Text

Annual Radiological Environmental Operating Report
	ML19119A087
Person / Time
Site:	Harris
Issue date:	04/29/2019
From:	Mccabe B; Duke Energy Progress
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	RA-19-0136
	Download: ML19119A087 (204)
	v • d • e

£-,DUKE Brian C. McCabe Support Services Manager ENERGY@ Harris Nuclear Plant 5413 Shearon Harris Road New Hill, NC 27562-9300 919.362.2124 April 29, 2019 Serial: RA-19-0136 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 Shearon Harris Nuclear Power P lant, Unit 1 Docket No. 50-400/Renewed License No. NPF-63

Subject:

Annual Radiological Environmental Operating Report Ladies and Gentlemen:

In accordance with Harris Nuclear Plant Technical Specification 6.9.1.3, Duke Energy Progress, LLC, is providing the enclosed Annual Radiological Environmental Operating Report for 2018.

This submittal contains no regulatory commitments. Please refer any questions regarding this submittal to Sarah McDaniel at (919) 362-2002.

Sincerely, BMJ,rr\ C /l14 Brian C. McCabe Enclosure cc: J. Zeiler, NRC Sr. Resident Inspector, HNP M. Barillas, NRC Project Manager, HNP NRC Regional Administrator, Region II

Brian C. McCabe Support Services Manager Harris Nuclear Plant 5413 Shearon Harris Road New Hill, NC 27562-9300 919.362.2124 Serial: RA-19-0136 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 Shearon Harris Nuclear Power Plant, Unit 1 Docket No. 50-400/Renewed License No. NPF-63

Subject:

Annual Radiological Environmental Operating Report Ladies and Gentlemen:

In accordance with Harris Nuclear Plant Technical Specification 6.9.1.3, Duke Energy Progress, LLC, is providing the enclosed Annual Radiological Environmental Operating Report for 2018.

This submittal contains no regulatory commitments. Please refer any questions regarding this submittal to Sarah McDaniel at (919) 362-2002.

Sincerely, Brian C. McCabe Enclosure cc: J. Zeiler, NRC Sr. Resident Inspector, HNP M. Barillas, NRC Project Manager, HNP NRC Regional Administrator, Region II

ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT DUKE ENERGY PROGRESS, LLC SHEARON HARRIS NUCLEAR POWER PLANT 2018

TABLE OF CONTENTS 1.0 Executive Summary . . . . . . . . . . . . 1-1 2.0 Introduction . . . . . . . . . . . . . 2-1 2.1 Site Description and Sample Locations . . . . . . . 2-1 2.2 Scope and Requirements of the REMP . . . . . . . 2-1 2.3 Statistical and Calculational Methodology . . . . . . . 2-2 2.3.1 Estimation of the Mean Value . . . . . . . . 2-2 2.3.2 Lower Limit of Detection and Minimum Detectable Activity . . 2-2 2.3.3 Trend Identification . . . . . . . . . . 2-3 3.0 Interpretation of Results . . . . . . . . . . . 3-1 3.1 Airborne Radioiodine and Particulates . . . . . . . 3-2 3.2 Drinking Water . . . . . . . . . . . . 3-4 3.3 Surface Water . . . . . . . . . . . . 3-6 3.4 Ground Water . . . . . . . . . . . . 3-8 3.5 Milk . . . . . . . . . . . . . . 3-9 3.6 Broadleaf Vegetation . . . . . . . . . . . 3-10 3.7 Food Products . . . . . . . . . . . . 3-12 3.8 Aquatic Vegetation. . . . . . . . . . . . 3-13 3.9 Fish . . . . . . . . . . . . . . 3-14 3.10 Shoreline Sediment . . . . . . . . . . . 3-15 3.11 Bottom Sediment . . . . . . . . . . . 3-16 3.12 Direct Gamma Radiation . . . . . . . . . . 3-18 3.12.1 Environmental TLD . . . . . . . . . 3-18 3.13 Land Use Census . . . . . . . . . . . 3-21 4.0 Quality Assurance . . . . . . . . . . . . 4-1 4.1 Sample Collection . . . . . . . . . . 4-1 4.2 Sample Analysis . . . . . . . . . . . 4-1 4.3 Dosimetry Analysis . . . . . . . . . . . 4-1 4.4 Laboratory Equipment Quality Assurance . . . . . . . 4-1 4.4.1 Daily Quality Control . . . . . . . . . 4-1 4.4.2 Calibration Verification . . . . . . . . . 4-1 4.4.3 Batch Processing . . . . . . . . . . 4-1 4.5 Duke Energy Interlaboratory Comparison Program . . . . . 4-2 4.5.1 Eckert & Ziegler Analytics Cross Check Program. . . . . 4-2 4.6 State of North Carolina Intercomparison Program . . . . . 4-2 4.7 TLD Intercomparison Program . . . . . . . . . 4-2 4.7.1 Nuclear Technology Services Intercomparison Program . . . 4-2 4.7.2 Internal Cross Check (Duke Energy) . . . . . . 4-3 4.8 General Engineering Laboratory, LLC (GEL) . . . . . . 4-3 i

Appendices Appendix A: Environmental Sampling and Analysis Procedures . . . . A-1 I. Change of Sampling Procedures . . . . . . . . A-2 II. Description of Analysis Procedures . . . . . . . . A-2 III. Change of Analysis Procedures . . . . . . . . . A-3 IV. Sampling and Analysis Procedures . . . . . . . . A-3 A.1 Airborne Particulate and Radioiodine . . . . . . A-3 A.2 Drinking Water . . . . . . . . . . A-4 A.3 Surface Water . . . . . . . . . . A-4 A.4 Ground Water . . . . . . . . . . . A-5 A.5 Milk . . . . . . . . . . . . A-6 A.6 Broadleaf Vegetation . . . . . . . . . A-6 A.7 Food Products . . . . . . . . . . . A-6 A.8 Aquatic Vegetation . . . . . . . . . . A-6 A.9 Fish . . . . . . . . . . . . A-7 A.10 Shoreline Sediment . . . . . . . . . . A-7 A.11 Bottom Sediment . . . . . . . . . . A-7 A.12 Direct Gamma Radiation (TLD) . . . . . . . A-7 A.13 Annual Land Use Census . . . . . . . . A-8 V. Global Positioning System (GPS) Analysis . . . . . . . A-8 Appendix B: Radiological Environmental Monitoring Program -

Summary of Results 2018 . . . . . . . . . B-1 Radiological Environmental Monitoring Program Data Summary. . . B-2 Footnotes to Appendix B . . . . . . . . . . B-5 Appendix C: Sampling Deviations & Unavailable Analyses . . . . . C-1 C.1 Sampling Deviations. . . . . . . . . . C-2 C.2 Unavailable Analyses . . . . . . . . . C-4 Appendix D: Analytical Deviations . . . . . . . . . . D-1 Analytical Deviations . . . . . . . . . D-2 Appendix E: Radiological Environmental Monitoring Program Results 2018 . . E-1 Appendix F: Errata to Previous Reports . . . . . . . . . F-1 Errata to the 2018 HNP AREOR . . . . . . . F-2 LIST OF FIGURES 2.1-1 Map of Site Boundary . . . . . . . . . . 2-4 2.1-2 Harris Nuclear Plant Sampling Locations - One mile radius . . . . 2-5 2.1-3 Harris Nuclear Plant Sampling Locations - Ten mile radius . . . . 2-6 3.1 Concentration of Gross Beta in Air Particulate. . . . . . . 3-2 3.2-1 Concentration of Gross Beta in Drinking Water . . . . . . 3-4 3.2-2 Concentration of Tritium in Drinking Water. . . . . . . 3-5 3.3 Concentration of Tritium in Surface Water. . . . . . . 3-7 3.6 Concentration of Cs-137 in Broadleaf Vegetation . . . . . 3-10 3.11 Concentration of Co-60 and Cs-137 in Bottom Sediment . . . . 3-16 3.12 Direct Gamma Radiation (TLD) Results. . . . . . . 3-19 3.13 Harris Nuclear Plant 2018 Land Use Census Map. . . . . . 3-23 ii

LIST OF TABLES 2.1-A Radiological Monitoring Program Sampling Locations . . . . 2-7 2.1-B Radiological Monitoring Program Sampling Locations (TLD Sites) . . 2-9 2.2-A Reporting Levels for Radioactivity Concentrations in Environmental Samples 2-10 2.2-B REMP Analysis Frequency . . . . . . . . . 2-10 2.2-C Detection Capabilities for the A Priori Lower Limit of Detection. . . 2-11 3.1-A Mean Concentration of Gross Beta in Air Particulate . . . . . 3-3 3.1-B Mean Concentration of Air Radioiodine (I-131). . . . . . 3-3 3.2 Mean Concentration of Radionuclides in Drinking Water. . . . . 3-5 3.3 Mean Concentration of Radionuclides in Surface Water. . . . . 3-7 3.6 Mean Concentration of Cs-137 in Broadleaf Vegetation . . . . 3-11 3.11 Mean Concentration of Radionuclides in Bottom Sediment. . . . 3-17 3.12 Direct Gamma Radiation (TLD) Results. . . . . . . . 3-20 3.13 Harris Land Use Census Comparison (2017 - 2018). . . . . . 3-22 4.0-A Eckert & Ziegler Analytics Cross Check Program . . . . . 4-4 4.0-B 2018 Environmental Dosimeter Cross Check Results . . . . . 4-6 4.0-C 2018 GEL Laboratories, LLC QA Results . . . . . . 4-8 LIST OF ACRONYMS USED IN THIS TEXT (in alphabetical order)

A Annually APAC Air Particulate Air Cartridge/Radioiodine AR Action Request - Corrective Action Program AREOR Annual Radiological Environmental Operating Report BLV Broadleaf Vegetation BW Biweekly C Control DW Drinking Water EZA Eckert and Ziegler Analytics GEL General Engineering Laboratory, LLC GPS Global Positioning System GW Ground Water HNP Harris Nuclear Plant or Shearon Harris Nuclear Plant LLD Lower Limit of Detection LUC Land Use Census M Monthly MAPEP Department of Energy Mixed Analyte Performance Evaluation Program MDA Minimum Detectable Activity mR/STD Qtr milliroentgen per standard quarter MWe Mega Watts electric NIST National Institute of Standards and Technology NCR Nuclear Condition Report - Corrective Action Program NRC Nuclear Regulatory Commission ODCM Offsite Dose Calculation Manual pCi/kg picocurie per kilogram pCi/l picocurie per liter pCi/m3 picocurie per cubic meter Q Quarterly REMP Radiological Environmental Monitoring Program SA Semiannually SM Semimonthly SW Surface Water TECH SPECs Technical Specifications TLD Thermoluminescent Dosimeter

µCi/ml microcurie per milliliter UFSAR Updated Final Safety Analysis Report W Weekly iii

1.0 EXECUTIVE

SUMMARY

This Annual Radiological Environmental Operating Report describes the Shearon Harris Nuclear Plant Radiological Environmental Monitoring Program (REMP), and the program results for the calendar year 2018.

Included in the report are the identification of sampling locations, descriptions of environmental sampling and analysis procedures, comparisons of present environmental radioactivity levels and pre-operational environmental data, analysis of trends in environmental radiological data as potentially affected by plant operations, and a summary of environmental radiological sampling results. Quality assurance practices, sampling deviations, unavailable samples, and program changes are also discussed.

Sampling activities were conducted as prescribed by the Harris Nuclear Plant Offsite Dose Calculation Manual (ODCM). One thousand five hundred and forty-three samples were analyzed comprising 1,613 test results in order to compile data for the 2018 report. Based on the annual land use census, the current number of sampling sites for Harris Nuclear Plant is sufficient.

Concentrations observed in the environment in 2018 for plant related radionuclides were generally within the ranges of concentrations observed in the past. Inspection of the data showed that radioactivity concentrations in drinking water, ground water, surface water, bottom sediment, and aquatic vegetation are higher than the activities reported for samples collected prior to the operation of the station. Measured concentrations, including tritium, were not higher than expected and all positively identified measurements attributable to station operation were within limits as specified in the HNP ODCM and regulatory limits.

Section 1 - Page 1

2.0 INTRODUCTION

2.1 SITE DESCRIPTION AND SAMPLE LOCATIONS Duke Energy Corporations Shearon Harris Nuclear Plant is a one-unit facility located on the shore of Harris Lake in southwest Wake County, North Carolina. The pressurized water reactor nuclear steam supply system furnished by Westinghouse Electric Corporation is designed to produce a net electrical output of approximately 930 MWe. Initial criticality was achieved on January 3, 1987.

Condenser cooling is accomplished utilizing a closed system incorporating a cooling tower, instead of using lake water directly. Liquid effluents are released into Harris Lake via the station discharge canal and are not accompanied by the large additional dilution water flow associated with once-through condenser cooling. This design results in greater radionuclide concentrations in the discharge canal given comparable liquid effluent source terms.

Sampling locations are chosen based upon meteorological factors, preoperational monitoring, and results of the land use surveys. Figure 2.1-1 is a map of the HNP site boundary. Sample points beyond the site boundary are considered offsite. Figures 2.1-2 and 2.1-3 are maps depicting the Thermoluminescent Dosimeter (TLD) monitoring locations and the sampling locations. The location numbers shown on these maps correspond to those listed in Tables 2.1-A and 2.1-B. Figure 2.1-2 comprises all sample locations within a one mile radius of HNP. Figure 2.1-3 comprises all sample locations within a 10 mile radius of HNP.

2.2 SCOPE AND REQUIREMENTS OF THE REMP An environmental monitoring program has been in effect at Harris Nuclear Plant since 1982, five years prior to commencing operation. The preoperational program provides data on the existing environmental radioactivity levels for the site and vicinity, which may be used to determine whether increases in environmental levels are attributable to the station. The operational program provides surveillance and backup support of detailed effluent monitoring which is necessary to evaluate the significance, if any, of the contributions to the existing environmental radioactivity levels that result from station operation.

This monitoring program is based on NRC guidance and is conducted in accordance with Operational Requirement 3.12.1 in the HNP Offsite Dose Calculation Manual and applicable procedures; with regards to sample media, sampling locations, sampling frequency and analytical sensitivity requirements. Indicator and control locations were established for comparison purposes to distinguish radioactivity of plant origin from natural or other man-made environmental radioactivity. The environmental monitoring program also verifies projected and anticipated radionuclide concentrations in the environment and related exposures from releases of radionuclides from Shearon Harris Nuclear Plant. This program satisfies the requirements of Section IV.B.2 of Appendix I to 10CFR50 and provides surveillance of all appropriate critical exposure pathways to man and protects vital interests of the company, public and state and federal Section 2 - Page 1

agencies concerned with the environment. Reporting levels for activity found in environmental samples are listed in Table 2.2-A. Table 2.2-B lists the REMP analysis and frequency schedule.

The Annual Land Use Census, required by the HNP Offsite Dose Calculation Manual is performed to ensure that changes in the use of areas at or beyond the site boundary are identified and that modifications to the REMP are made if required by changes in land use. This census satisfies the requirements of Section IV.B.3 of Appendix I to 10CFR50. Results are shown in Table 3.13.

Participation in an interlaboratory comparison program is performed in fulfillment of HNP ODCM Operational Requirements. The comparison program provides for independent checks on the precision and accuracy of measurements of radioactive material in REMP sample matrices.

Such checks are performed as part of the quality assurance program for environmental monitoring in order to demonstrate that the results are valid for the purposes of Section IV.B.2 of Appendix I to 10CFR50. A summary of the results obtained as part of this comparison program are in Section 4 of this annual report.

2.3 STATISTICAL AND CALCULATIONAL METHODOLOGY 2.3.1 ESTIMATION OF THE MEAN VALUE There was one (1) basic statistical calculation performed on the raw data resulting from the environmental sample analysis program. The calculation involved the determination of the mean value for the indicator and the control samples for each sample medium. The mean is a widely used statistic. This value was used in the reduction of the data generated by the sampling and analysis of the various media in the Radiological Environmental Monitoring Program. Net activity (or concentration)" is the activity (or concentration) determined to be present in the sample. No "Minimum Detectable Activity", "Lower Limit of Detection", "Less Than Level", or negative activities or concentrations are included in the calculation of the mean. The following equation was used to estimate the mean:

N x i x = i =1 N

Where:

x = estimate of the mean, i = individual sample, N = total number of samples with a net activity (or concentration),

i = net activity (or concentration) for sample i.

2.3.2 LOWER LIMIT OF DETECTION AND MINIMUM DETECTABLE ACTIVITY The Lower Limit of Detection (LLD) and Minimum Detectable Activity (MDA) are used throughout the REMP.

Section 2 - Page 2

LLD - The LLD, as defined in the ODCM as the smallest concentration of radioactive material in a sample that will yield a net count, above the system background, that will be detected with 95% probability with only 5% probability of falsely concluding that a blank observation represents a "real" signal. The LLD is an a priori (before the fact) lower limit of detection. The actual LLD is dependent upon the standard deviation of the background-counting rate, the counting efficiency, the sample size (mass or volume), the radiochemical yield and the radioactive decay of the sample between sample collection and counting. The "required" LLDs for each sample medium and selected radionuclides are given in the ODCM and are listed in Table 2.2-C.

MDA - The MDA is the net counting rate (sample after subtraction of background) that must be surpassed before a sample is considered to contain a scientifically measurable amount of a radioactive material exceeding background amounts. The MDA is calculated using a sample background and may be thought of as an "actual" LLD for a particular sample measurement. Certain gross counting measurements display a calculated negative value, indicating background is greater than sample activity.

2.3.3 TREND IDENTIFICATION One of the purposes of an environmental monitoring program is to determine if there is a buildup of radionuclides in the environment due to the operation of the nuclear plant.

Visual inspection of tabular or graphical presentations of data (including preoperational) is used to determine if a trend exists. A decrease in a particular radionuclide's concentration in an environmental medium does not indicate that reactor operations are removing radioactivity from the environment, but that reactor operations are not adding that radionuclide to the environment in quantities exceeding the preoperational level and that the normal removal processes (radioactive decay, deposition, resuspension, etc.) are influencing the concentration.

Substantial increases or decreases in the amount of a particular radionuclide's release from the nuclear plant will greatly affect the resulting environmental levels; therefore, a knowledge of the release of a radionuclide from the nuclear plant is necessary to completely interpret the trends, or lack of trends, determined from the environmental data.

Factors that may affect environmental levels of radionuclides include prevailing weather conditions (periods of drought, solar cycles or heavier than normal precipitation),

construction in or around either the nuclear plant or the sampling location, and addition or deletion of other sources of radioactive materials (such as the 1986 Chernobyl accident and the Japan earthquake and tsunami, which triggered the 2011 Fukushima Dai-ichi Nuclear Power Plant incident). Some of these factors may be obvious while others are sometimes unknown. Therefore, how trends are identified will include some judgment by plant personnel.

Section 2 - Page 3

Figure 2.1-1 Map of Site Boundary Section 2 - Page 4

Figure 2.1-2 Harris Nuclear Plant Sampling Locations - One Mile Radius Section 2 - Page 5

Figure 2.1-3 Harris Nuclear Plant Sampling Locations - Ten Mile Radius Section 2 - Page 6

TABLE 2.1-A HARRIS NUCLEAR PLANT RADIOLOGICAL MONITORING PROGRAM SAMPLING LOCATIONS Table 2.1-B Codes Table 2.1-B Codes (Cont.)

W Weekly SM Semimonthly AC Air Cartridge SB Sediment Bottom FI Fish BW BiWeekly Q Quarterly AP Air Particulate AV Aquatic Vegetation MK Milk M Monthly SA Semiannually SW Surface Water FP Food Product A Annual DW Drinking Water BLV Broadleaf Vegetation C Control I Indicator SS Sediment Shoreline GW Ground Water Site Type Location Description(4) AC & SW DW SS SB AV FP(1) Fish Milk BLV(2) GW AP (FI) (Mk)

1 I 0.1 mi. S on SR 1134 from SR W/Q 1011 Intersection, N sector, 2.6 mi. from site.

2 I 1.4 mi. S on SR 1134 from SR W/Q 1011 intersection, NNE sector, 1.4 mi. from site.

4 I 0.7 mi. N on SR 1127 from W/Q intersection with US, NNE sector, 3.1 mi. from site 5 C Pittsboro, WNW sector, W/Q SM/M

>12 mi. from site M(2) 12 I SHNPP Site, SSW sector, 0.9 M(2) mi. from site.

26 I Harris Lake Spillway, S sector, W/Q M SA A 4.7 mi. from site.

40 I NE Harnett Metro Water M Treatment Plant Intake building, SSE sector, 17.2 mi. from site.

41 I Shoreline of Mixing Zone of SA A Cooling Tower Blowdown Line, S sector, 3.8 mi. from site.

43 C Sanford Water Treatment Plant, M SW sector, 8.5 mi. from site.

44 I Site varies within Harris Lake SA 45 C Site varies above Buckhorn Dam on Cape Fear River SA 46 I NE Harnett Metro Water BW/M Treatment Plant Intake building, SSE sector, 17.2 mi. from site.

47 I 1.3 mi. N on SR 1912 from W/Q intersection of NC 42, SSW sector, 3.4 mi. from site.

51 I SHNPP Water Treatment Plant (On Site) BW/M 52 I Harris Lake in the Vicinity of SA the Mixing Zone of the Cooling Tower, S sector, 3.8 mi. of site.

57 I SHNPP Site (LP-13), N. side of Q Aux Res Intake canal, SSW sector,0.4 mi. from site.

58 C Sanford Water Treatment Plant, BW/M SW sector, 8.5 mi. from site.

59 I SHNPP Site (W-13), N. Side of Q Old Construction Road, NNE sector, 0.5 mi. from site.

60 I SHNPP Site, (W-9A), W. bank Q of Harris Lake SE of Cooling Tower, ESE sector, 0.5 mi. from site.

61 C Harris Lake East of New Hill- A Holleman Rd, E sector, 2.5 mi.

of site.

Section 2 - Page 7

Site Type Location Description(4) AC & SW DW SS SB AV FP(1) Fish Milk BLV(2) GW AP (FI) (Mk)

63 I SHNPP Site, SW sector, 0.6 mi. W/Q M(2) from site.

68 I SHNPP Site (LP-6), N. of Old Q Steam Generator building, W sector, 0.2 mi. of site.

69 I SHNPP Site, (LP-7), N. side of Q Warehouse 9, NNE sector, 0.2 mi. from site.

70 I SHNPP Site (LP-9), N. side of Q Plant Entrance, E sector, 0.4 mi.

of site.

71 I SHNPP Site (LP-16), S. of Q Switchyard, SE sector, 0.3 mi.

of site.

72 I SHNPP Site (MWA-12), N. of Q Cooling Tower Makeup Water Intake Structures, SE sector, 0.2 mi. from site.

73 I SHNPP Site, N. of Emergency Q Service Water Screening Structure, SE sector,0.2 mi. from site.

74 I SHNPP Site, N. of helicopter Q landing pad, SSE sector, 0.2 mi.

from site.

75 I SHNPP Site, W. of Security Q Building Entrance, ESE sector, 0.1 mi from site.

77 I SHNPP Site (BD-MW1), Along Q the Cooling Tower Blowdown Line, S sector, 0.4 mi. from site.

78 I SHNPP Site (BD-MW2), Along Q the Cooling Tower Blowdown Line, S sector, 0.5 mi. from site.

79 I SHNPP Site (BD-MW3), Along Q the Cooling Tower Blowdown Line, S sector, 0.5 mi. from site.

80 I SHNPP Site (BD-MW5), Along Q the Cooling Tower Blowdown Line, S sector, 0.6 mi. from site.

81 I SHNPP Site (BD-MW7), Along Q the Cooling Tower Blowdown Line, S sector, 0.6 mi. from site.

82 I SHNPP Site (BD-MW8), Along Q the Cooling Tower Blowdown Line, S sector, 0.6 mi. from site.

83 I SHNPP Site (BD-MW16), Q Along the Cooling Tower Blowdown Line, S sector, 1.6 mi. from site.

90 I SHNPP Site, SSW sector, 0.5 W/Q mi. from site.

91 I HE&EC, Sewage Treatment W/Q Facility, ENE sector, 1.6 mi.

from site.

97 C Granite Springs Farm, NW sector, 19.1 mi. from site. M(1) 102 I Goat Farm, W sector, 2.82 mi. SM(3) from site.

(1) When Available, during Harvest/Growing Season (2) During Growing Season per ODCM - May through October (3) When goats are lactating (4) GPS data reflect approximate accuracy to within 2-5 meters. GPS field measurements were taken as close as possible to the item of interest.

Section 2 - Page 8

TABLE 2.1-B HARRIS NUCLEAR PLANT RADIOLOGICAL MONITORING PROGRAM SAMPLING LOCATIONS (TLD SITES)

Table 2.1-C Codes IR Inner Ring OR Outer Ring C Control SI Special Interest Site Measure Location(1) Distance Sector Site Measure Location(1) Distance Sector

Type (miles) # Type (miles) 1 IR 0.1 mi. on SR 1134 from 2.6 N 25 OR 0.2 mi. W on SR 1402 from 4.7 SSE SR 1011 intersection intersection of SR 1400.

2 IR 1.4 mi. S on SR 1134 1.4 NNE 26 OR Harris lake Spillway 4.7 S from SR 1011 intersection 3 SI HE&EC Visitor Center 1.9 ENE 27 OR NC 42 @ Buckhorn United 4.8 SSW (Population Center) Methodist Church 4 SI New Hill (Population 3.1 NNE 28 OR 0.6mi. on SR 1924 from 4.8 SW Center), 0.7 mi. N on SR intersection of SR 1916.

1127 from intersection with US 1 5 C Pittsboro 13.3 WNW 29 OR Parking Lot of Arclin, Inc. on 5.7 WSW SR 1916.

6 IR Intersection of SR 1134 & 0.8 ENE 30 OR Exit intersection of SR 1972 and 5.6 W SR 1135 US 1 7 IR Extension of SR 1134 0.7 E 31 OR At intersection of SR 1908, 4.7 WNW 1909, 1910.

8 IR Dead end of road. 0.6 ESE 32 SI Jordan Lake (Population 6.4 NNW Extension of SR 1134. Center), SR 1008.

9 IR 1 mi. S on SR 1130 from 2.2 SE 33 OR SR 1142. 1.7 mi. from 4.5 NNW intersection of SR 1127, intersection of SR 1141.

1115, and 1130.

10 IR SR 1130 S of intersection 2.2 SSE 48 OR SR 1142. 1.5 mi. from 4.5 N of SR 1127, 1115, and intersection of SR 1141.

1130.

11 IR SHNPP site 0.6 S 49 IR SR 1127. 0.3 mi. S from 2.5 NE intersection with US 1.

12 IR SHNPP site 0.9 SSW 50 SI Holleman Crossroad (Population 2.6 ESE Center), SR 1127 W from intersection SR 1115 and 1130.

13 IR SHNPP site 0.7 WSW 53 OR SR 1972 N from intersection of 5.8 NW SR 1910 and SR 1972.

14 IR SHNPP site. Access road 1.5 W 56 IR SR 1912 at intersection of SR 3.0 WSW to aux. reservoir. 1912 and SR 1924.

15 IR SR 1911. 2.0 W 63 IR SHNPP site 0.6 SW 19 OR 0.6 mi. E on SR 1142 5.0 NNE 93 IR SR 1911 2.2 WNW from intersection of SR 1141.

20 OR US 1 at intersection SR 4.5 NE 94 IR Old US HWY 1 2.0 NW 1149.

21 OR 1.2 mi. W on SR 1152 4.8 ENE 95 IR Bonsal Rd. 2.0 NNW from intersection SR 1153.

22 OR Formerly Ragans Dairy 4.3 E 98 SI Holly Springs School Complex 5.9 E on SR 1115. (Population Center) 23 OR Intersection of SR 1127 4.8 ESE 99 SI Friendship High School 5.5 NNE and SR 1116. (Population Center) 24 OR Sweet Springs Church on 4.0 SE SR 1116.

(1) GPS data reflect approximate accuracy to within 2-5 meters. GPS field measurements were taken as close as possible to the item of interest.

Section 2 - Page 9

TABLE 2.2-A REPORTING LEVELS FOR RADIOACTIVITY CONCENTRATIONS IN ENVIRONMENTAL SAMPLES Analysis Water Airborne Fish Milk Food Products (pCi/liter) Particulate or (pCi/kg-wet) (pCi/liter) (pCi/kg-wet)

Gases (pCi/m3)

H-3 20,000(a)

Mn-54 1,000 30,000 Fe-59 400 10,000 Co-58 1,000 30,000 Co-60 300 10,000 Zn-65 300 20,000 Zr-Nb-95 400 I-131 2(b) 0.9 3 100 Cs-134 30 10 1,000 60 1,000 Cs-137 50 20 2,000 70 2,000 Ba-La-140 200 300 (a) For drinking water samples. This is 40 CFR Part 141 value. If no drinking water pathway exists, a value of 30,000 pCi/liter may be used.

(b) If no drinking water pathway exists, a value of 20 pCi/liter may be used.

TABLE 2.2-B REMP ANALYSIS FREQUENCY Sample Analysis Gamma Tritium Low Gross TLD Medium Schedule Isotopic Level Beta I-131 Air Radioiodine Weekly X Air Particulate Weekly X Quarterly X Direct Radiation Quarterly X Surface Water Monthly Composite(d) X X X Drinking Water Monthly Composite(c) X X Ground Water Quarterly X X Bottom Sediment Semiannually X Shoreline Sediment Semiannually X Milk Semimonthly/Monthly X X Fish Semiannually X Aquatic Vegetation Annually X Broadleaf Vegetation Monthly(a) X Food Products Monthly(b) X (a) During growing season per ODCM - May through October (b) When Available (c) Low-level I-131 will be analyzed on each composite when the dose calculated for the consumption of the water is greater than 1 mrem/yr.

(d) 1st quarter only; Analysis Discontinued (AR # 02240431)

Section 2 - Page 10

TABLE 2.2-C DETECTION CAPABILITIES FOR THE A PRIORI LOWER LIMIT OF DETECTION Analysis Water Airborne Fish Milk Food Products Sediment (pCi/liter) Particulates or (pCi/kg-wet) (pCi/liter) (pCi/kg-wet) (pCi/kg-dry)

Gases (pCi/m3)

Gross Beta 4 0.01 H-3 2000 (a)

Mn-54 15 130 Fe-59 30 260 Co-58, 60 15 130 Zn-65 30 260 Zr-Nb-95 15 I-131 1(b) 0.07 1 60 Cs-134 15 0.05 130 15 60 150 Cs-137 18 0.06 150 18 80 180 Ba-La-140 15 15 (a) If no drinking water pathway exists, a value of 3000 pCi/liter may be used.

(b) If no drinking water pathway exists, a value of 15 pCi/liter may be used.

Section 2 - Page 11

3.0 INTERPRETATION OF RESULTS Review of all 2018 REMP analysis results was performed to identify changes in environmental levels as a result of plant operations. The following section depicts and explains the review of these results. Sample data for 2018 was compared to historical data.

Over the years of operation, analysis and collection changes have taken place that do not allow direct comparisons for some data collected from 1984 (preoperational) through 2018.

Summary tables containing 2018 information required by Technical Specifications 6.9.1.3 and HNP ODCM E.3 are located in Appendix B. REMP results for 2018 are located in Appendix E.

Evaluation for significant trends was performed for radionuclides that are listed as required within the HNP ODCM. The radionuclides include: H-3, Mn-54, Fe-59, Co-58, Co-60, Zn-65, Zr-95, Nb-95, I-131, Cs-134, Cs-137, Ba-140 and La-140. Other radionuclides detected that are the result of plant operation, but not required for reporting, are trended.

The HNP ODCM addresses actions to be taken if radionuclides other than those required are detected in samples collected. The occurrences of these radionuclides could be the result of HNP liquid effluents which contained the radionuclides.

All 2018 sample analysis results were reviewed to detect and identify any significant trends. All negative concentration values were replaced with zero for calculation purposes.

Any zero concentrations used in tables or graphs represent activity measurements less than detectable levels.

Review of the 2018 data presented in this section supports the conclusion that there were no significant changes in environmental sample radionuclide concentrations of samples collected and analyzed from HNP and surrounding areas that were attributable to plant operations. Inspection of the data showed that radioactivity concentrations were as expected and all positively identified measurements attributed to plant operations were within HNP ODCM regulatory limits; thus presenting no significant impact to the environment or public health and safety.

Data presented in Sections 3.1 through 3.12 support the conclusion that there was no significant increase in radioactivity in the environment around Harris Nuclear Plant due to station operations in 2018. Similarly, there was no significant increase in ambient background radiation levels in the surrounding areas. The 2018 land use census data, shown in Section 3.13, indicates that no program changes are required as a result of the census.

Section 3 - Page 1

3.1 AIRBORNE RADIOIODINE AND PARTICULATES In 2018, 468 radioiodine and particulate samples were analyzed, 416 from eight indicator locations and 52 at the control location. Particulate samples were analyzed weekly for gross beta. A quarterly gamma analysis was performed on the quarterly filter composite (by location).

Figure 3.1 shows individual sample gross beta results for the indicator location with highest annual mean and the control location samples during 2018. The two sample locations results are similar in concentration and have varied negligibly.

There were no detectable gamma emitters attributable to plant operations identified for particulate filters analyzed during 2018. Table 3.1-A shows the highest indicator annual mean and control location annual mean for gross beta in air particulate.

There was no detectable I-131 in air radioiodine samples analyzed in 2018. Table 3.1-B shows the highest indicator annual mean and control location annual mean for I-131 since 1999. The table shows similar concentrations for both the indicator and control locations.

No I-131 activity due to HNP operations has been detected during the entire operating history of the plant.

K-40 and Be-7 were observed in air samples and quarterly particulate composites but are naturally occurring radionuclides.

Figure 3.1 pCi/m3 Concentration of Gross Beta in Air Particulate 1.00E-01 9.00E-02 8.00E-02 7.00E-02 6.00E-02 5.00E-02 4.00E-02 3.00E-02 2.00E-02 1.00E-02 0.00E+00 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 Indicator Location Control Location There is no reporting level for gross beta in air particulate Section 3 - Page 2

Table 3.1-A Mean Concentration of Gross Beta in Air Particulate Year Indicator Location (pCi/m3) Control Location (pCi/m3) 1999 2.38E-2 1.87E-2 2000 1.83E-2 1.80E-2 2001 1.74E-2 1.60E-2 2002 1.70E-2 1.67E-2 2003 1.78E-2 1.70E-2 2004 2.13E-2 2.00E-2 2005 2.14E-2 2.07E-2 2006 1.99E-2 1.98E-2 2007 2.26E-2 2.29E-2 2008 2.25E-2 2.13E-2 2009 2.07E-2 1.92E-2 2010 2.76E-2 2.12E-2 2011 2.40E-2 2.10E-2 2012 2.29E-2 2.10E-2 2013 1.67E-2 1.65E-2 2014 1.86E-2 1.82E-2 2015 1.82E-2 1.82E-2 2016 1.98E-2 1.95E-2 2017 2.06E-2 2.05E-2 2018 1.96E-2 1.89E-2 Table 3.1-B Mean Concentration of Air Radioiodine (I-131)

Year Indicator Location (pCi/m3) Control Location (pCi/m3) 1999 0.00E+0 0.00E+0 2000 0.00E+0 0.00E+0 2001 0.00E+0 0.00E+0 2002 0.00E+0 0.00E+0 2003 0.00E+0 0.00E+0 2004 0.00E+0 0.00E+0 2005 0.00E+0 0.00E+0 2006 0.00E+0 0.00E+0 2007 0.00E+0 0.00E+0 2008 0.00E+0 0.00E+0 2009 0.00E+0 0.00E+0 2010 0.00E+0 0.00E+0 2011(1) 1.66E-1 1.08E-1 2012 0.00E+0 0.00E+0 2013 0.00E+0 0.00E+0 2014(2) 0.00E+0 0.00E+0 2015 0.00E+0 0.00E+0 2016 0.00E+0 0.00E+0 2017 0.00E+0 0.00E+0 2018 0.00E+0 0.00E+0 0.00E+0 indicates no detectable measurements (1) 2011 concentrations affected by Fukushima Dai-ichi (2) 2014 Gamma spectroscopy system was replaced 10JUL2014. Gamma spectroscopy system hardware, detector cooling apparatus, software, electronics, nuclide identification libraries, and analytical test matrix components for test matrices were modified (NCR #

0739995). No analytical changes were observed due to the 2014 gamma spectroscopy system change.

Section 3 - Page 3

3.2 DRINKING WATER Gross beta analysis, tritium, and gamma spectroscopy were performed on 39 drinking water samples. Two indicator locations were sampled, along with one control location.

No gamma emitting radionuclides attributable to plant operations were identified in any 2018 drinking water samples. There have been no gamma emitting radionuclides attributable to plant operations identified in drinking water samples during the entire operating history of the plant.

Figure 3.2-1 and Table 3.2 shows highest annual mean gross beta concentrations for the indicator locations and control location since 1999. The indicator locations (downstream of the plant effluent release point) average concentration was 3.48 pCi/l in 2018 and the control location concentration was 3.68 pCi/l. The table shows that current gross beta levels are not statistically different from 1999.

Tritium was detected in thirteen indicator samples from Location 51 and in no control samples during 2018. The mean indicator tritium concentration for 2018 was 3,270 pCi/l, 16.35% of reporting level. Figure 3.2-2 and Table 3.2 display the highest indicator and control location annual mean concentrations for tritium since 1999.

The dose for consumption of water was less than one mrem per year, historically and for 2018; therefore, low-level iodine analysis is not required.

K-40 and Be-7 are naturally occurring radionuclides that were observed in drinking water samples in 2018.

Figure 3.2-1 pCi/liter Concentration of Gross Beta in Drinking Water 20 18 16 14 12 10 8

6 4

2 0

1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 Indicator Location Control Location There is no reporting level for gross beta in drinking water Section 3 - Page 4

Figure 3.2-2 pCi/liter Concentration of Tritium in Drinking Water 30000 25000 20000 15000 10000 5000 0

1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 Indicator Location Control Location EPA Reporting Level Prior to 2009, drinking water indicator location # 51 was previously not classified as a public drinking water source. In 2009, location # 51 was classified as a public drinking water source; however, it is not a community drinking water source.

Table 3.2 Mean Concentration of Radionuclides in Drinking Water Gross Beta (pCi/l) Tritium (pCi/l)

YEAR Indicator Control Indicator Control Location Location Location Location 1999 4.55E+0 4.83E+0 2.37E+3 0.00E+0 2000 4.45E+0 4.73E+0 2.06E+3 0.00E+0 2001 5.11E+0 5.39E+0 3.76E+3 0.00E+0 2002 5.80E+0 6.03E+0 4.07E+3 0.00E+0 2003 3.81E+0 3.69E+0 2.40E+3 0.00E+0 2004 4.82E+0 4.96E+0 3.66E+3 0.00E+0 2005 4.95E+0 4.86E+0 4.20E+3 0.00E+0 2006 5.07E+0 4.58E+0 4.03E+3 0.00E+0 2007 5.01E+0 5.67E+0 3.12E+3 0.00E+0 2008 4.92E+0 5.40E+0 4.54E+3 0.00E+0 2009 5.37E+0 5.58E+0 3.95E+3 0.00E+0 2010 5.07E+0 5.09E+0 2.23E+3 0.00E+0 2011 5.58E+0 6.22E+0 2.65E+3 0.00E+0 2012 5.47E+0 5.69E+0 6.51E+3 0.00E+0 2013 3.37E+0 3.60E+0 5.89E+3 0.00E+0 2014 3.56E+0 4.06E+0 4.83E+3 0.00E+0 2015 3.97E+0 4.28E+0 4.74E+3 0.00E+0 2016 3.76E+0 3.40E+0 4.32E+3 0.00E+0 2017 4.52E+0 4.44E+0 4.02E+3 0.00E+0 2018 3.48E+0 3.68E+0 3.27E+3 0.00E+0 0.00E+0 indicates no detectable measurements Prior to 2009, drinking water indicator location # 51 was previously not classified as a public drinking water source. In 2009, location # 51 was classified as a public drinking water source; however, it is not a community drinking water source.

Section 3 - Page 5

3.3 SURFACE WATER A total of 39 monthly surface water samples were analyzed for gamma emitting radionuclides and tritium. Two indicator locations and one control location were sampled.

Location 26, Harris Lake Spillway, is the only indicator location sample that contained tritium with an average concentration of 7,460 pCi/l and showed a range of activities from 3,620 to 12,800 pCi/l. Tritium was not detected in the thirteen control samples collected during 2018.

No gamma emitting radionuclides attributable to plant operations were identified in 2018 surface water samples. Table 3.3 summarizes the indicator annual means of radionuclides detected since 1999. Visual inspection of the tabular data did not reveal any increasing trends.

Surface water samples were only analyzed for Gross Beta in the first quarter of 2018. Gross Beta is not a required sample analysis per the HNP ODCM. Self-Assessment AR#

02240431 determined the gross beta analysis was not required and the analysis was discontinued. Average gross beta concentrations at the indicator and control locations during the first quarter of 2018 were 5.12 pCi/l and 4.72 pCi/l, respectively.

Figure 3.3 displays the highest indicator and control annual means for tritium since 1999.

K-40 and Be-7 are naturally occurring radionuclides that were observed in surface water samples in 2018.

Section 3 - Page 6

Figure 3.3 pCi/liter Concentration of Tritium in Surface Water 30000 25000 20000 15000 10000 5000 0

1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 Indicator Location Control Location There is no reporting level for tritium in surface water, however, if no drinking water pathway exists, a value of 30,000 pCi/l may be used.

Table 3.3 Mean Concentrations of Radionuclides in Surface Water Gross Beta (pCi/l) Tritium (pCi/l)

YEAR Indicator Control Indicator Control Location Location Location Location 1999 4.55E+0 4.83E+0 3.63E+3 0.00E+0 2000 4.45E+0 4.73E+0 3.52E+3 0.00E+0 2001 5.11E+0 5.39E+0 4.31E+3 0.00E+0 2002 5.80E+0 6.03E+0 4.49E+3 0.00E+0 2003 3.81E+0 3.69E+0 2.67E+3 0.00E+0 2004 4.82E+0 4.96E+0 4.20E+3 0.00E+0 2005 4.95E+0 4.86E+0 5.94E+3 0.00E+0 2006 5.07E+0 4.58E+0 4.73E+3 0.00E+0 2007 5.01E+0 5.67E+0 5.26E+3 0.00E+0 2008 5.11E+0 5.40E+0 6.68E+3 0.00E+0 2009 5.62E+0 5.58E+0 5.50E+3 0.00E+0 2010 5.23E+0 5.09E+0 3.83E+3 0.00E+0 2011 5.76E+0 6.22E+0 4.36E+3 0.00E+0 2012 6.66E+0 5.69E+0 8.08E+3 0.00E+0 2013 4.57E+0 3.60E+0 8.21E+3 0.00E+0 2014 4.27E+0 4.06E+0 5.44E+3 0.00E+0 2015 3.99E+0 4.28E+0 6.17E+3 0.00E+0 2016 4.03E+0 3.40E+0 5.68E+3 0.00E+0 2017 4.02E+0 4.05E+0 5.98E+3 0.00E+0 2018 5.12E+0(1) 4.72E+0(1) 7.46E+3 0.00E+0 0.00E+0 indicates no detectable measurements (1) 1st quarter only; Analysis Discontinued (AR # 02240431)

Section 3 - Page 7

3.4 GROUND WATER Eighteen indicator ground water sample locations were sampled quarterly on site at HNP, there is no control location. In total, seventy-two ground water samples were analyzed for gamma emitters and tritium in 2018. The measured ground water gamma and tritium concentrations were below environmental requirements stated in the HNP ODCM.

No gamma emitting radionuclides attributable to plant operations were identified in 2018 ground water samples.

Tritium was detected in some ground water samples, ranging from 174 pCi/l to 1,160 pCi/l in 2018; however, the results are well below the EPA reportable drinking water limit (20,000 pCi/l) and non-drinking water limit (30,000 pCi/l). The ground water wells, located on site at HNP, are monitoring wells and are not a water supply for drinking or irrigation.

Therefore, there is no radiological dose via this pathway.

K-40 and Be-7 are naturally occurring radionuclides that were observed in ground water samples in 2018.

Section 3 - Page 8

3.5 MILK A total of 31 milk samples were analyzed by gamma spectroscopy and low-level iodine during 2018. One indicator goat milk location was sampled from late spring to late fall and one control cow milk location was sampled the entire year.

There were no gamma emitting radionuclides attributable to plant operations identified in milk samples in 2018. Cs-137 was identified in one goat milk sample collected in October of 2018 (NCR # 02243290). An evaluation was conducted in 2018 (AR # 02243634) to determine if any further actions were warranted. The outcome of this study deemed that there is no risk to the public and the Cs-137 most likely is from past nuclear weapons testing. In the 1950s and 1960s, Cs-137 was released during bomb testing and fallout occurred over the Earth. Trees and vegetation grown in contaminated soil concentrated the Cs-137 into their leaves and wood. Plant leaves can be consumed by grazing animals, such as goats and cows, and the radioactivity transferred into the animals milk. Broadleaf vegetation samples show that Cs-137 is naturally present in the environment in the area and likely influenced the positive result.

K-40 and Be-7 are naturally occurring radionuclides that were observed in milk samples in 2018.

Section 3 - Page 9

3.6 BROADLEAF VEGETATION In lieu of the monthly indicator milk samples, per HNP ODCM, indicator broadleaf vegetation samples were collected in both the SW and SSW sectors of HNP. Broadleaf sampling is conducted to simulate dose to an individual via the milk pathway for compliance purposes.

Gamma spectroscopy was performed on 18 broadleaf vegetation samples during 2018 during the growing season (May through October). Two indicator locations and one control location were sampled.

No gamma emitting radionuclides, other than naturally occurring, were reported in vegetation samples. However, it is not unusual for Cs-137 to be present in vegetation. It is a constituent of nuclear weapons test fallout and nuclear plant accidents and has been observed in samples from indicator and control locations in the past. Figure 3.6 and Table 3.6 shows the mean activity of Cs-137 at the indicator and control locations.

K-40 and Be-7 are naturally occurring radionuclides that were observed in broadleaf vegetation samples in 2018.

Figure 3.6 pCi/kg Concentration of Cs-137 in Broadleaf Vegetation 500 450 400 350 300 250 200 150 100 50 0

1999 2003 2007 2011 2015 Indicator Location Control Location Section 3 - Page 10

Table 3.6 Mean Concentration of Cs-137 in Broadleaf Vegetation Year Indicator Location (pCi/kg) Control Location (pCi/kg) 1999 0.00E+0 0.00E+0 2000 0.00E+0 0.00E+0 2001 7.39E+1 0.00E+0 2002 6.86E+1 0.00E+0 2003 0.00E+0 0.00E+0 2004 0.00E+0 0.00E+0 2005 0.00E+0 0.00E+0 2006 7.35E+1 0.00E+0 2007 3.77E+1 0.00E+0 2008 6.23E+1 0.00E+0 2009 0.00E+0 0.00E+0 2010 0.00E+0 0.00E+0 2011 0.00E+0 0.00E+0 2012 0.00E+0 0.00E+0 2013 0.00E+0 0.00E+0 2014 4.77E+0 2.20E+1 2015 0.00E+0 0.00E+0 2016 0.00E+0 0.00E+0 2017 0.00E+0 0.00E+0 2018 0.00E+0 0.00E+0 Section 3 - Page 11

3.7 FOOD PRODUCTS The HNP Land Use Census (LUC) has never identified any gardens irrigated by water in which liquid plant wastes have been discharged; therefore, food product collection is not required. There is no indicator location for this media type and sampling at a control location is maintained for historical integrity.

During the 2018 growing season twenty-eight samples were collected and analyzed for gamma radionuclides. From January to August, the three different species of food products collected from the one location were analyzed individually for gamma emitters. In September, this was changed to a single mixed food product sample (AR # 02227572).

Gamma analyses of the food products detected no plant-related activity in any of the twenty-eight samples from control location #97 collected in 2018.

K-40 and Be-7 are naturally occurring radionuclides that were observed in food product samples in 2018.

Section 3 - Page 12

3.8 AQUATIC VEGETATION The 2018 data shows that there were three aquatic vegetation indicator samples and two control samples collected from Harris Lake, which are sampled annually. The aquatic vegetation samples (Lyngbya and Hydrilla) from Harris Lake are not consumed by humans, thus pose no radiological dose to the general public by the ingestion pathway.

Gamma analyses of the aquatic vegetation detected historical plant-related activity in the two indicator samples and the one control sample collected during 2018. Cs-137 activity was detected with a concentration of 8.31 pCi/kg at Location #41, which is 3.8 miles S of the plant (NCR # 02236885). An evaluation was conducted in 2018 (AR # 02243634) to determine if any further actions were warranted. The positive detection was caused by a change in the collection species. Historically, Hydrilla has been collected and analyzed for gamma emitters but due to Harris Lake Hydrilla control measures there was inadequate supply of this species so Lyngbya was collected. Lyngbya is a blue green alga mat that floats along the lake surface. The vegetation is not consumed by fish, so it tends to be long lived and less controlled. Since Harris Lake is the recipient of radioactive discharges, the Lyngbya may be accumulating Cs-137 from the water as it floats around the lake surface.

Because of the free-floating nature of Lyngbya, the positive detection of Cs-137 should be anticipated and does not indicate an unusual accumulation of Cs-137 in the Harris Lake environment.

No long-term trends have been readily observed in these samples.

K-40 and Be-7 are naturally occurring radionuclides that were observed in aquatic vegetation samples in 2018.

Section 3 - Page 13

3.9 FISH Gamma spectroscopy was performed on 12 fish samples collected during 2018; four samples of bottom-feeding species (catfish) and eight samples of free-swimming species (sunfish and largemouth bass) from the indicator and control locations.

There were no gamma emitting radionuclides attributable to plant operations identified in any fish samples in 2018.

K-40 and Be-7 are naturally occurring radionuclides that were observed in fish samples collected during 2018.

Section 3 - Page 14

3.10 SHORELINE SEDIMENT Shoreline sediment samples were collected semiannually in 2018 from two indicator locations. There is no control location for this sample media type.

Gamma analyses of the four shoreline sediments detected natural activity in the samples collected during 2018. No long-term trends are readily observed in these samples.

K-40 and Be-7 are naturally occurring radionuclides that were observed in shoreline sediment samples collected during 2018.

Section 3 - Page 15

3.11 BOTTOM SEDIMENT During 2018, a total of two bottom sediment samples were analyzed from the indicator location. There is no control location for bottom sediment.

The 2018 data indicated an annual average mean activity of 177 pCi/kg of Co-60, and 125 pCi/kg of Cs-137 activity in the indicator samples which are sampled semiannually. The bottom sediment sample from Harris Lake poses no radiological dose to the general public via this pathway due to the fact that it is not easily accessible (i.e. bottom sediment is approximately forty to sixty feet underwater). The positive detection most likely is from past nuclear weapons testing and historical plant discharges. These samples are for long-term trends for liquid effluent monitoring.

Figure 3.11 and Table 3.11 provide individual sample gamma results for the highest annual mean indicator location concentrations since 1999 for Co-60 and Cs-137.

Naturally occurring K-40 was observed in some bottom sediment samples collected during 2018.

Figure 3.11 pCi/kg Concentration of Co-60 and Cs-137 in Bottom Sediment 14000 12000 10000 8000 6000 4000 2000 0

1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 Co-60 Indicator Location Cs-137 Indicator Location There is no reporting level for Co-60 or Cs-137 in Bottom Sediment.

Section 3 - Page 16

Table 3.11 Mean Concentration of Radionuclides in Bottom Sediment YEAR Control Co-60 (pCi/kg) Cs-137 (pCi/kg)

Location Indicator Indicator Location Location 1999 No Control 1.05E+4 4.40E+2 2000 No Control 2.42E+3 3.69E+2 2001 No Control 6.03E+3 4.20E+2 2002 No Control 3.12E+3 3.91E+2 2003 No Control 2.52E+3 2.78E+2 2004 No Control 9.17E+2 1.52E+2 2005 No Control 2.49E+3 3.33E+2 2006 No Control 1.23E+3 2.11E+2 2007 No Control 5.92E+2 2.15E+2 2008 No Control 1.15E+3 1.99E+2 2009 No Control 7.50E+2 1.50E+2 2010 No Control 6.84E+2 2.23E+2 2011 No Control 7.30E+2 2.43E+2 2012 No Control 1.79E+3 2.19E+2 2013 No Control 4.20E+2 1.94E+2 2014(1) No Control 4.31E+2 1.26E+2 2015 No Control 2.66E+2 1.39E+2 2016 No Control 2.13E+2 1.85E+2 2017 No Control 2.14E+2 8.35E+1 2018 No Control 1.77E+2 1.25E+2 (1) 2014 Gamma spectroscopy system was replaced 10JUL2014. Gamma spectroscopy system hardware, detector cooling apparatus, software, electronics, nuclide identification libraries, and analytical test matrix components for test matrices were modified (NCR # 0739995). No analytical changes were observed due to the 2014 gamma spectroscopy system change.

Section 3 - Page 17

3.12 DIRECT GAMMA RADIATION 3.12.1 ENVIRONMENTAL TLD The Harris Updated Final Safety Analysis Report (UFSAR) Section 2.1.1.2 identifies that the minimum distance (+/- 25 ft.) and direction from the reactor to an exclusion area boundary is 6790 ft. ESE. This is the same boundary established for determining radioactive effluent release limits. No permanent public access is permitted within the exclusion area. Harris has forty-one routine monitoring stations.

TLD locations designated as "inner ring" are located in each of the sixteen meteorological sectors in the general area of the Site Boundary. The inner ring TLDs are used as indicators. TLD locations designated as "outer ring" are outside the Site Boundary, located in each of the sixteen meteorological sectors, and are within 6 -

8 km from the site. All outer ring TLD locations are used as indicators. The balance of the stations are placed in locations such as population centers, nearby residences, or schools and are designated as "special interest" and one "control" location. These locations were chosen to reduce the probability of influence from Harris operation on data. The control locations are not used as background subtraction in the TLD analysis. Their purpose is to provide a comparison to indicator locations.

Thermoluminescent dosimeters (TLDs) were used to monitor ambient radiation exposures in the plant environs. In 2018, 161 TLDs were analyzed, 157 at indicator locations and 4 at the control location. TLDs are collected and analyzed quarterly.

The TLD with the highest annual mean was 17.5 mR/Std Qtr. at indicator location

94, 2.0 miles NW of plant center.

Comparison of the average annual TLD exposure within the area of the Site Boundary (inner ring) of the plant with at a distance of 6 - 8 km (outer ring) and the special interest and control since 1999 is presented in Figure 3.12 and Table 3.12.

As of first quarter 2014, the environmental TLDs that are placed in the field for REMP are Harshaw TLDs. Panasonic TLDs were the type of environmental TLDs for REMP monitoring prior to 2014. This change was a merger initiative in order to achieve fleet standardization of the TLD program. This change in environmental TLDs for the REMP indicates a step change in activity as mentioned in NCR #

01982479 between the Panasonic TLD readings prior to 2014 and the Harshaw TLD readings from 2014 to present. There are three factors that can be attributed to the step increase that was observed: (1) the annealing method levels employed were lower for the Panasonic TLDs, (2) transit control subtraction differences, and (3) the calculation/method of fade correction (fixed fade control - vs - actual in field TLDs).

Data accrual began in 2016 for enhanced analytical methods which will be evaluated for future implementation when sufficient data is available. The new methods will improve data transparency and interpretation.

A TLD intercomparison program is conducted as part of the quality assurance program. Results of this program are included in Section 4.7.

Section 3 - Page 18

Figure 3.12 mR/Std. Qtr. Direct Gamma Radiation (TLD) Results 40 30 20 10 0

1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 Inner Ring Outer Ring Control There is no reporting level for Direct Radiation (TLD).

Section 3 - Page 19

Table 3.12 Direct Gamma Radiation (TLD) Results Inner Ring Average Outer Ring Average Control Average Year (mR/Std. Qtr.) (mR/Std. Qtr.) (mR/Std. Qtr.)

1999 1.15E+1 1.15E+1 1.53E+1 2000 1.13E+1 1.12E+1 1.54E+1 2001 1.15E+1 1.13E+1 1.50E+1 2002 1.14E+1 1.14E+1 1.48E+1 2003 1.13E+1 1.11E+1 1.45E+1 2004 1.16E+1 1.14E+1 1.52E+1 2005 1.18E+1 1.15E+1 1.55E+1 2006 1.21E+1 1.16E+1 1.55E+1 2007 1.15E+1 1.12E+1 1.43E+1 2008 1.18E+1 1.15E+1 1.49E+1 2009 1.18E+1 1.15E+1 1.51E+1 2010 1.19E+1 1.14E+1 1.47E+1 2011 1.19E+1 1.14E+1 1.47E+1 2012 1.17E+1 1.11E+1 1.46E+1 2013 1.15E+1 1.09E+1 1.47E+1 2014 1.50E+1 1.39E+1 1.82E+1 2015 1.46E+1 1.38E+1 1.78E+1 2016 1.44E+1 1.37E+1 1.61E+1 2017 1.50E+1 1.39E+1 1.59E+1 2018 1.50E+1 1.38E+1 1.61E+1 Section 3 - Page 20

3.13 LAND USE CENSUS The 2018 HNP Annual Land Use Census was conducted July 24 and 25, 2018, as required by the HNP ODCM 4.12.2. Table 3.13 summarizes the comparison between the 2017 and 2018 census results. A map indicating identified locations is shown in Figure 3.13.

During the 2018 census no irrigated gardens, no new meat animals nearer than existing gardens, or new milk locations were identified. The nearest residence is located in the NNW sector at 1.55 miles. No environmental program changes were required as a result of the 2018 land use census.

Section 3 - Page 21

Table 3.13 Harris Land Use Census Comparison (2017 - 2018)

Nearest Pathway (Miles)

RESIDENCE GARDEN MEAT ANIMAL(1) MILK ANIMAL SECTOR 2017 2018 2017 2018 2017 2018 2017 2018 North 2.21 2.21 2.29 2.29 2.21 2.21 4.14(2) 4.14(2)

North-Northeast 1.81 1.81 1.81 1.81 --- --- --- ---

Northeast 2.43 2.29* 2.92 2.92 --- --- --- ---

East-Northeast 1.78 1.78 2.06 ---* 2.01 2.01 --- ---

East 1.88 1.88 2.16 2.16 --- --- --- ---

East-Southeast 2.73 2.73 2.83 2.83 --- --- --- ---

Southeast 4.11 4.11 4.11 4.11 4.11 ---* --- ---

South-Southeast 4.26 4.26 4.26 4.26 --- --- --- ---

South --- --- --- --- --- --- --- ---

South-Southwest 3.82 3.82 4.13 4.13 --- --- --- ---

Southwest 2.76 2.76 --- --- --- --- --- ---

West-Southwest 4.29 4.29 4.29 4.29 --- --- --- ---

West 2.75 2.75 2.75 4.19* --- --- 2.82(3) 2.82(3)

West-Northwest 2.13 2.13 4.33 3.75* --- --- --- ---

Northwest 2.24 2.24 3.17 3.17 --- --- --- ---

North-Northwest 1.55 1.55 1.82 1.82 1.82 1.82 --- ---

Sector and distance determined by Global Positioning System.

Represents a change from the previous year.

--- Indicates no occurrences within the 5 mile radius (1) Meat animal was only identified at the nearest garden or closer in each sector. Poultry and egg laying animals were not classified as meat animals for the 2018 census.

(2) Goat Milk - Milk is used to feed goat kids, make a small quantity of cheese, and to make soap for personal use. Owner said they can now supply enough milk to participate in the HNP REMP. This dairy is not required due to HNP already having a dairy within 5 km (3.11 miles) and the dose being <1.0 mRem/year.

(3) Goat Milk - Milk is used to feed goat kids during the breeding months and the family consumes what is left. The milk that is not suitable for consumption is given to someone to make soap. This location participates in the REMP and milk is collected for 4 - 6 consecutive months per year (Late-Spring to Late-Fall months).

Section 3 - Page 22

Figure 3.13 Section 3 - Page 23

4.0 QUALITY ASSURANCE 4.1 SAMPLE COLLECTION EnRad Laboratories and Environmental Services performed the environmental sample collections as specified by approved sample collection procedures.

4.2 SAMPLE ANALYSIS EnRad Laboratories and General Engineering Laboratories (GEL), LLC performed the environmental sample analyses as specified by approved analysis procedures. EnRad Laboratories is located in Huntersville, North Carolina, at Duke Energys Environmental Center. GEL is located in Charleston, South Carolina.

4.3 DOSIMETRY ANALYSIS The Dosimetry and Records group performed the environmental dosimetry measurements as specified by approved dosimetry analysis procedures. The Dosimetry and Records Laboratory is located in Huntersville, North Carolina, at Duke Energys Environmental Center.

4.4 LABORATORY EQUIPMENT QUALITY ASSURANCE 4.4.1 DAILY QUALITY CONTROL EnRad Laboratories has an internal quality assurance program which monitors each type of instrumentation for reliability and accuracy. Daily quality control checks ensure that instruments are in proper working order and these checks are used to monitor instrument performance.

4.4.2 CALIBRATION VERIFICATION National Institute of Standards and Technology (NIST) standards that represent counting geometries are analyzed as unknowns at various frequencies ranging from weekly to annually to verify that efficiency calibrations are valid. The frequency is dependent upon instrument use and performance. Investigations are performed and documented should calibration verification data fall outside of the acceptable limits.

4.4.3 BATCH PROCESSING Method quality control samples are analyzed with sample analyses that are processed in batches. These include tritium analyses in drinking water, surface water, and ground water samples.

Section 4 - Page 1

4.5 DUKE ENERGY INTERLABORATORY COMPARISON PROGRAM In 2018 Duke Energy Environmental Laboratory (EnRad) participated in interlaboratory programs to satisfy Radiological Environmental Monitoring Program requirements in Duke Energy nuclear plant Offsite Dose Calculation Manuals and Selected Licensee Commitments Manuals, as applicable.

EnRad Laboratory participated in an interlaboratory program with Eckert & Ziegler Analytics (EZA) in 2018. EZA results were evaluated against the NRC Inspection Manual Procedure 84750 (IP 84750) acceptance criteria stated in EnRad Procedure 515, Cross Check Program Administration. All regulatory requirements continue to be met by the EZA Cross Check Program.

4.5.1 ECKERT & ZIEGLER ANALYTICS CROSS CHECK PROGRAM EZA mixed gamma in liquid, mixed gamma in soil, low-level I-131 in liquid, mixed gamma air filter composites, I-131 air cartridges, strontium in water, gross alpha and beta in water, gross alpha and beta in filters, and tritium in water were analyzed at various times of the year at EnRad Laboratories. A summary of the applicable REMP EnRad Laboratory program results for 2018 is documented in Table 4.0-A.

Interlaboratory cross check samples from EZA were received and analyzed in three of the four quarters of 2018. Table 4.0-A lists the performance for specific samples.

Forty-six nuclide results were reported to EZA of which forty-six (100 %) met the acceptance criteria based on IP 84750.

4.6 STATE OF NORTH CAROLINA INTERCOMPARISON PROGRAM Harris Nuclear Power Plant routinely participates in an environmental sample intercomparison program. Program elements include sampling frequency and analysis parameters for surface water, ground water, cow milk, air particulate, air radioiodine, fish, bottom sediment, and shoreline sediment samples that have been collected. Samples are routinely split with the State of North Carolina for intercomparison analysis for Harris Nuclear Plant.

4.7 TLD INTERCOMPARISON PROGRAM 4.7.1 NUCLEAR TECHNOLOGY SERVICES INTERCOMPARISON PROGRAM Radiation Dosimetry and Records participates in a quarterly TLD intercomparison program administered by Nuclear Technology Services, Inc. of Roswell, GA.

Nuclear Technology Services irradiates environmental dosimeters quarterly and sends them to the Radiation Dosimetry and Records group for analysis of the unknown estimated delivered exposure. A summary of the 2018 Nuclear Technology Services Intercomparison Report is documented in Table 4.0-B.

Section 4 - Page 2

The individual measurements were evaluated and results falling outside the acceptable ratio criteria had an evaluation performed to identify any recommended remedial actions and to reduce anomalous errors.

4.7.2 INTERNAL CROSS CHECK (DUKE ENERGY)

Radiation Dosimetry and Records participates in a quarterly TLD internal comparison program administered internally by the Dosimetry Lab. The Dosimetry Lab Staff irradiates environmental dosimeters quarterly and submits them for analysis of the unknown estimated delivered exposure. A summary of the 2018 Internal Cross Check (Duke Energy) Program is documented in Table 4.0-B.

4.8 GENERAL ENGINEERING LABORATORY, LLC (GEL)

General Engineering Laboratory, LLC (GEL) participated in various Quality Assurance Programs for Inter-laboratory, Intra-laboratory, Third Party Cross Check programs, and a number of proficiency testing programs during 2018. A summary of the GEL quality assurance program results for the sample media types sent to GEL during 2018 is documented in Table 4.0-C. Table 4.0-C may not be applicable to all plants or stations.

Section 4 - Page 3

TABLE 4.0-A ECKERT & ZIEGLER ANALYTICS CROSS CHECK PROGRAM 2018 Cross Check Results for EnRad Laboratories Interlaboratory cross check samples from EZA were received and analyzed in three of the four quarters of 2018. Results are reported directly to Eckert & Ziegler Analytics. Environmental cross check samples were analyzed in replicate, and the result closest to the mean is reported to Eckert & Ziegler Analytics. The acceptance criteria for the program was based on the NRC Inspection Manual Procedure 84750 (IP 84750). Table 4.0-A lists the performance for specific samples.

Forty-six nuclide results were reported to EZA of which forty-six (100 %) met the acceptance criteria based on IP 84750.

EnRad EZA EnRad/EZA Sample Sample ID Nuclide Quarter Units Evaluation Value Value Ratio Beta Filter in E12096 Cs-137 1 pCi 212 207 1.02 Agreement Planchet E12180 Cs-137 2 pCi 202 210 0.96 Agreement I-131 in E12095 I-131 1 pCi 99.2 95.3 1.04 Agreement Charcoal Cartridge E12246 I-131 3 pCi 82.0 81.6 1.00 Agreement Gamma in E12094 Ce-141 1 pCi 83.8 82.0 1.02 Agreement Composite 1 Agreement Filter Co-58 pCi 124 121 1.02 Co-60 1 pCi Agreement 197 199 0.99 Cr-51 1 pCi Agreement 349 347 1.01 Cs-134 1 pCi Agreement 180 191 0.94 Cs-137 1 pCi Agreement 192 183 1.05 Fe-59 1 pCi Agreement 160 148 1.08 Mn-54 1 pCi Agreement 138 140 0.99 Zn-65 1 pCi 283 Agreement 260 1.09 Gamma in E12249 Ce-141 3 pCi/g 0.217 0.221 0.98 Agreement Simulated 3 Agreement Co-58 pCi/g 0.239 0.248 0.96 Soil Co-60 3 pCi/g 0.317 0.328 0.97 Agreement Cr-51 3 pCi/g 0.407 0.457 0.89 Agreement Cs-134 3 pCi/g 0.207 0.212 0.98 Agreement Cs-137 3 pCi/g 0.311 0.330 0.94 Agreement Fe-59 3 pCi/g 0.196 0.206 0.95 Agreement Mn-54 3 pCi/g 0.309 0.289 1.07 Agreement Zn-65 3 pCi/g 0.362 0.347 1.04 Agreement Section 4 - Page 4

TABLE 4.0-A (Cont.)

Sample EnRad EZA EnRad/EZA Sample Nuclide Quarter Units Evaluation ID Value Value Ratio Gamma in E12250 Ce-141 3 pCi/L 146 137 1.07 Agreement Water 3 Agreement Co-58 pCi/L 164 153 1.07 Co-60 3 215 202 1.06 Agreement pCi/L Cr-51 3 307 282 1.09 Agreement pCi/L Cs-134 3 127 131 0.97 Agreement pCi/L Cs-137 3 169 157 1.07 Agreement pCi/L Fe-59 3 138 127 1.08 Agreement pCi/L I-131 3 64.7 62.5 1.04 Agreement pCi/L Mn-54 3 193 178 1.08 Agreement pCi/L Zn-65 3 240 214 1.12 Agreement pCi/L Gamma in E12097 Ce-141 1 pCi/L 79.4 77.0 1.03 Agreement Milk 1 Agreement Co-58 pCi/L 116 114 1.02 Co-60 1 pCi/L 192 187 1.03 Agreement Cr-51 1 Agreement pCi/L 335 326 1.03 Cs-134 1 Agreement pCi/L 174 180 0.97 Cs-137 1 Agreement pCi/L 183 172 1.06 Fe-59 1 Agreement pCi/L 151 139 1.09 Mn-54 1 Agreement pCi/L 141 131 1.07 Zn-65 1 Agreement pCi/L 266 244 1.09 LLI-131 in E12097 I-131 1 pCi/L 101 108 0.93 Agreement Milk Gross Beta E12178 Cs-137 2 pCi/L 224 226 0.99 Agreement in Water E12248 Cs-137 3 pCi/L 174 199 0.88 Agreement Tritium in E12179 H-3 2 pCi/L 11300 11000 1.02 Agreement Water E12247 H-3 3 pCi/L 13100 12900 1.00 Agreement Section 4 - Page 5

TABLE 4.0-B 2018 ENVIRONMENTAL DOSIMETER CROSS-CHECK RESULTS Nuclear Technology Services Radiation Dosimetry and Records participates in a quarterly TLD intercomparison program administered by Nuclear Technology Services, Inc. of Roswell, GA. Nuclear Techno1ogy Services irradiates environmental dosimeters quarterly and sends them to Radiation Dosimetry and Records group for analysis of the unknown estimated delivered exposure. The individual measurements were evaluated and results falling outside the acceptable ratio criteria had an evaluation performed to identify any recommended remedial actions and to reduce anomalous errors.

1st Quarter 2018 2nd Quarter 2018 TLD Reported Delivered Bias Pass/Fail TLD Reported Delivered Bias Pass/Fail Number (mR) (mR) (% diff) Criteria Pass/Fail Number (mR) (mR) (% diff) Criteria Pass/Fail 103109 84.34 76.32 10.51 <+/-15% Pass 100476 57.72 60.80 -5.07 <+/-15% Pass 103168 83.20 76.32 9.01 <+/-15% Pass 101207 59.63 60.80 -1.92 <+/-15% Pass 102842 79.60 76.32 4.30 <+/-15% Pass 100628 58.40 60.80 -3.95 <+/-15% Pass 102197 79.34 76.32 3.96 <+/-15% Pass 100232 54.45 60.80 -10.44 <+/-15% Pass 102240 79.98 76.32 4.80 <+/-15% Pass 103236 58.36 60.80 -4.01 <+/-15% Pass Average Bias (B) 6.51 Average Bias (B) -5.08 Standard Deviation (S) 3.03 Standard Deviation (S) 3.21 Measure Performance lBl+S 9.54 <15% Pass Measure Performance lBl+S 8.29 <15% Pass 3rd Quarter 2018 4th Quarter 2018 TLD Reported Delivered Bias Pass/Fail TLD Reported Delivered Bias Pass/Fail Number (mR) (mR) (% diff) Criteria Pass/Fail Number (mR) (mR) (% diff) Criteria Pass/Fail 102475 18.69 18.84 -0.80 <+/-15% Pass 103532 67.52 61.93 9.03 <+/-15% Pass 100674 18.66 18.84 -0.96 <+/-15% Pass 102805 67.74 61.93 9.38 <+/-15% Pass 100287 17.66 18.84 -6.96 <+/-15% Pass 103209 66.84 61.93 7.93 <+/-15% Pass 101172 18.23 18.84 -3.24 <+/-15% Pass 103347 69.03 61.93 11.46 <+/-15% Pass 101202 18.48 18.84 -1.91 <+/-15% Pass 103399 67.21 61.93 8.53 <+/-15% Pass Average Bias (B) -2.63 Average Bias (B) 9.27 Standard Deviation (S) 2.25 Standard Deviation (S) 1.35 Measure Performance lBl+S 4.88 <15% Pass Measure Performance lBl+S 10.61 <15% Pass Section 4 - Page 6

TABLE 4.0-B (Cont.)

2018 ENVIRONMENTAL DOSIMETER CROSS CHECK RESULTS Internal Crosscheck (Duke Energy)

Radiation Dosimetry and Records participates in a quarterly TLD internal comparison program administered internally by the Dosimetry Lab. The Dosimetry Lab Staff irradiates environmental dosimetry quarterly and submits them for analysis of the unknown estimated delivered exposure.

1st Quarter 2018 2nd Quarter 2018 TLD Reported Delivered Bias Pass/Fail TLD Reported Delivered Bias Pass/Fail Number (mR) (mR) (% diff) Criteria Pass/Fail Number (mR) (mR) (% diff) Criteria Pass/Fail 103932 34.28 37.26 -7.99 <+/-15% Pass 103049 20.41 18.49 10.38 <+/-15% Pass 103952 34.50 37.26 -7.40 <+/-15% Pass 103360 21.06 18.49 13.90 <+/-15% Pass 104007 34.95 37.26 -6.19 <+/-15% Pass 100021 18.06 18.49 -2.33 <+/-15% Pass 103961 35.30 37.26 -5.26 <+/-15% Pass 102504 20.03 18.49 8.33 <+/-15% Pass 103962 35.10 37.26 -5.79 <+/-15% Pass 102466 19.51 18.49 5.52 <+/-15% Pass 103931 35.54 37.26 -4.61 <+/-15% Pass 100208 17.93 18.49 -3.03 <+/-15% Pass 104011 35.22 37.26 -5.47 <+/-15% Pass 101155 18.66 18.49 0.92 <+/-15% Pass 103950 35.48 37.26 -4.77 <+/-15% Pass 101145 17.93 18.49 -3.03 <+/-15% Pass 103949 35.37 37.26 -5.07 <+/-15% Pass 101272 18.00 18.49 -2.65 <+/-15% Pass 103951 35.75 37.26 -4.05 <+/-15% Pass 100515 17.87 18.49 -3.35 <+/-15% Pass Average Bias (B) -5.66 Average Bias (B) 2.47 Standard Deviation (S) 1.24 Standard Deviation (S) 6.52 Measure Performance lBl+S 6.90 <15% Pass Measure Performance lBl+S 8.99 <15% Pass 3rd Quarter 2018 4th Quarter 2018 TLD Reported Delivered Bias Pass/Fail TLD Reported Delivered Bias Pass/Fail Number (mR) (mR) (% diff) Criteria Pass/Fail Number (mR) (mR) (% diff) Criteria Pass/Fail 102886 44.09 40.0 10.23 <+/-15% Pass 102089 46.94 45.0 4.31 <+/-15% Pass 102730 44.27 40.0 10.68 <+/-15% Pass 102442 45.03 45.0 0.07 <+/-15% Pass 102248 41.02 40.0 2.55 <+/-15% Pass 102336 47.40 45.0 5.33 <+/-15% Pass 102867 42.58 40.0 6.45 <+/-15% Pass 103721 48.89 45.0 8.64 <+/-15% Pass 102464 40.91 40.0 2.27 <+/-15% Pass 102738 48.54 45.0 7.87 <+/-15% Pass 102752 43.09 40.0 7.73 <+/-15% Pass 103194 47.94 45.0 6.53 <+/-15% Pass 102803 43.80 40.0 9.50 <+/-15% Pass 102931 47.59 45.0 5.76 <+/-15% Pass 103531 43.17 40.0 7.93 <+/-15% Pass 103742 49.22 45.0 9.38 <+/-15% Pass 102880 44.04 40.0 10.10 <+/-15% Pass 102029 47.14 45.0 4.76 <+/-15% Pass 102415 42.26 40.0 5.65 <+/-15% Pass 102290 46.10 45.0 2.44 <+/-15% Pass Average Bias (B) 7.31 Average Bias (B) 5.51 Standard Deviation (S) 3.06 Standard Deviation (S) 2.84 Measure Performance lBl+S 10.37 <15% Pass Measure Performance lBl+S 8.35 <15% Pass Section 4 - Page 7

TABLE 4.0-C 2018 GEL Laboratories, LLC QA Results Interlaboratory cross check samples from Eckert & Ziegler Analytics (EZA) and Proficiency Tests from the Department of Energy Mixed Analyte Performance Evaluation Program (MAPEP) were received and analyzed by GEL in all four quarters of 2018 from EZA and in two quarters from MAPEP. Table 4.0-C lists the performance for specific samples.

Table 4.0-C may not be applicable to all plants/stations.

GEL Known Acceptance Sample Sample Nuclide Quarter Units Evaluation Value Value Range/Ratio ID Hard To Detect in MAPEP Fe-55 2 Bq/kg 67 N/A False Pos Test Agreement Soil Ni-63 2 Bq/kg 1.05 N/A False Pos Test Agreement MaS38 Sr-90 2 Bq/kg -108 N/A False Pos Test Agreement MAPEP Fe-55 4 Bq/kg 434 512 358 - 666 Agreement Ni-63 4 Bq/kg 793 765 536 - 995 Agreement MaS39 Sr-90 4 Bq/kg 162 193 135 - 251 Agreement I-131 in Milk with E12173 I-131 1 pCi/L 105 108 0.97 Agreement EZA E12173 I-131 2 pCi/L 78.9 71.9 1.10 Agreement E12242 I-131 3 pCi/L 71.8 58.2 1.23 Agreement E12348 I-131 4 pCi/L 95.8 93.3 1.03 Agreement Gross Beta in Water E12304(1) Cs-137 4 pCi/L 241 295 0.82 Agreement (1)

One set of December 2018 Gross Beta in water analyses were analyzed at GEL.

Section 4 - Page 8

APPENDIX A ENVIRONMENTAL SAMPLING

&

ANALYSIS PROCEDURES 2018 Appendix A - Page 1

APPENDIX A ENVIRONMENTAL SAMPLING AND ANALYSIS PROCEDURES Adherence to established procedures for sampling and analysis of environmental media at Harris Nuclear Plant was required to ensure compliance with the Harris Nuclear Plant Offsite Dose Calculation Manual. Analytical procedures were employed to ensure that the ODCM detection capabilities were achieved.

Environmental sampling was performed by EnRad Laboratories and Environmental Services.

Environmental analysis was performed by EnRad Laboratories, Dosimetry and Records, and General Engineering Laboratories, LLC (GEL).

This appendix describes the environmental sampling frequencies and analysis procedures by media type.

I. CHANGE OF SAMPLING PROCEDURES Food product sample collection Procedure 750, Food Products Sampling at Harris Nuclear Plant, was changed to one mixed food product collection per site instead of three separate types of food product sample collections per site. This change was due to a lack of sufficient sample volume of each food product type. The food product sample collection change meets the HNP ODCM food products sampling requirements and is documented in AR # 02227572.

TLD #11 (SHNPP Site, S Sector, 0.6 mi. from site) was moved from the wet land area to GW-82 (SHNPP Site, S Sector, 0.6 mi. from site) due to safety concerns identified during the Nuclear General Office (NGO) Environmental thermoluminescent dosimeter (TLD)

Documentation Project (AR # 02202715). Because neither the mileage nor sector changed during the TLD move, an ODCM update was not required.

Water sampling collection Procedure 748, Water Sampling at Harris Nuclear Plant, was changed to eliminate sample collection for gross beta analysis. Self-Assessment AR # 02240431 determined that the gross beta analysis was not required and the gross beta analysis was discontinued.

II. DESCRIPTION OF ANALYSIS PROCEDURES Gamma spectroscopy analyses are performed using high purity germanium gamma detectors and Canberra analytical software. Designated sample volumes are transferred to appropriate counting geometries and analyzed by gamma spectroscopy. Perishable Appendix A - Page 2

samples such as fish, food products, aquatic vegetation, and broadleaf vegetation are ground to achieve a homogeneous mixture. Soils and sediments are dried, sifted to remove foreign objects (rocks, clams, glass, etc.), and then transferred to an appropriate counting geometry.

Low-level iodine analyses are performed by passing a designated sample aliquot through a pre-measured amount of ion exchange resin to remove and concentrate any iodine in the aqueous sample (milk). The resin is then dried, mixed thoroughly, and a net resin weight determined before being transferred to an appropriate counting geometry and analyzed by gamma spectroscopy.

Tritium analyses are performed by using low-level environmental liquid scintillation analysis technique on a Perkin-Elmer 4910TR liquid scintillation system or Perkin-Elmer 3100TR liquid scintillation system. Tritium samples are distilled and batch processed with a laboratory fortified blank, matrix spike, matrix spike duplicate, and blank to verify instrument performance and sample preparation technique are acceptable.

Gross beta analysis is performed by concentrating a designated aliquot of sample precipitate and analyzing by Tennelec XLB Series 5 gas-flow proportional counters.

Samples are batch processed with a blank to ensure sample contamination has not occurred.

III. CHANGE OF ANALYSIS PROCEDURES No analysis procedures were changed during 2018.

IV. SAMPLING AND ANALYSIS PROCEDURES A.1 AIRBORNE PARTICULATE AND RADIOIODINE Airborne particulate and radioiodine samples at each of nine locations were composited continuously by means of continuous air samplers. Air particulates were collected on a particulate filter and radioiodines were collected in a charcoal cartridge positioned behind the filter in the sampler. The samplers are designed to operate at a constant flow rate (in order to compensate for any filter loading) and are set to sample approximately 2 cubic feet per minute. Filters and cartridges were collected weekly. A separate weekly gamma analysis was performed on each charcoal cartridge. A weekly gross beta analysis was performed on each filter and then the filters, by location, were composited to produce quarterly filter samples for gamma analysis. The continuous composite samples were collected from the locations listed below.

Location 1 = 0.1 mi. S on SR 1134 from SR 1011 intersection. N sector, 2.6 mi. from site.

Appendix A - Page 3

Location 2 = 1.4 mi. S on SR 1134 from SR 1011 intersection. NNE sector, 1.4 mi. from site.

Location 4 = 0.7 mi. N on SR 1127 from intersection with US 1. NNE sector, 3.1 mi. from site.

Location 5 = Pittsboro (Control Station), WNW sector, >12mi. from site.

Location 26 = Harris Lake Spillway, S sector, 4.7 mi. from site.

Location 47 = 1.3 mi. N on SR 1912 from intersection of NC 42, SSW sector, 3.4 mi. from site.

Location 63 = SHNPP site, SW sector, 0.6 mi. from site.

Location 90 = SHNPP site, SSW sector, 0.5 mi. from site.

Location 91 = HE&EC, Sewage Treatment Facility, ENE sector, 1.6 mi.

from site.

A.2 DRINKING WATER Bimonthly composite drinking water samples were collected from location 51, with aliquots going to monthly composite samples. A monthly composite drinking water sample was collected from the remaining drinking water locations. Gross beta, tritium, and gamma analyses were performed on the monthly composites. The composites are collected from the locations listed below.

Location 46 = NE Harnett Metro Water Treatment Plant Intake Building SSE sector, 17.2 mi. from site.

Location 51 = SHNPP Water Treatment Building (on Site)

Location 58 = Sanford Water Treatment Plant (Control Station), SW sector, 8.5 mi. from site.

A.3 SURFACE WATER Bimonthly composite surface water samples were collected from location 26, with aliquots going to monthly composite samples. A monthly composite surface water sample was collected from the remaining surface water locations.

Tritium and gamma analyses were performed on the monthly composites. The composites are collected from the locations listed below.

Location 26 = Harris Lake Spillway, S sector, 4.7 mi. from site.

Location 40 = NE Harnett Metro Water Treatment Plant Intake Building SSE sector, 17.2 mi. from site.

Location 43 = Sanford Water Treatment Plant (Control Station), SW sector, 8.5 mi. from site.

Appendix A - Page 4

A.4 GROUND WATER Grab samples were collected quarterly from ground water wells at eighteen locations. A gamma analysis and tritium analysis were performed on each sample.

The samples were collected from the locations listed below.

Location 57 = SHNPP Site (LP-13), N. side of Aux Res Intake canal, SSW sector, 0.4 mi. from site Location 59 = SHNPP Site (W-13), N. Side of Old Construction Road, NNE sector, 0.5 mi. from site.

Location 60 = SHNPP Site (W-9A), W. bank of Harris Lake SE of Cooling Tower, ESE sector, 0.5 mi. from site.

Location 68 = SHNPP Site (LP-6), N. of Old Steam Generator Building, W sector, 0.2 mi. from site.

Location 69 = SHNPP Site (LP-7), S. side of Warehouse 9, NNE sector, 0.2 mi. from site.

Location 70 = SHNPP Site (LP-9), N. side of Plant Entrance Road, E sector, 0.4 mi. from site.

Location 71 = SHNPP Site (LP-16), S. of Switch Yard, SE sector, 0.3 mi from site.

Location 72 = SHNPP Site (MWA-12), N. of Cooling Tower Makeup Water Intake Structures, SE sector, 0.2 mi. from site.

Location 73 = SHNPP Site, N. of Emergency Service Water Screening Structure, S sector, 0.2 mi. from site.

Location 74 = SHNPP Site, N. of helicopter landing pad, SSE sector, 0.2 mi. from site.

Location 75 = SHNPP Site, W. of Security Building Entrance, ESE sector, 0.1 mi. from site.

Location 77 = SHNPP Site (BD-MW1), Along the Cooling Tower Blowdown Line, S Sector, 0.4 mi. from site.

Location 78 = SHNPP Site (BD-MW2), Along the Cooling Tower Blowdown Line, S Sector, 0.5 mi. from site.

Location 79 = SHNPP Site (BD-MW3), Along the Cooling Tower Blowdown Line, S Sector, 0.5 mi. from site.

Location 80 = SHNPP Site (BD-MW5), Along the Cooling Tower Blowdown Line, S Sector, 0.6 mi. from site.

Location 81 = SHNPP Site (BD-MW7), Along the Cooling Tower Blowdown Line, S Sector, 0.6 mi. from site.

Location 82 = SHNPP Site (BD-MW8), Along the Cooling Tower Blowdown Line, S Sector, 0.6 mi. from site.

Location 83 = SHNPP Site (BD-MW16), Along the Cooling Tower Blowdown Line, SSW Sector, 1.6 mi. from site.

Appendix A - Page 5

A.5 MILK Monthly grab samples were collected at the control location January through May and November and December of 2018. Biweekly grab samples were collected from the control location and the indicator location mid-May through October of 2018. A gamma and low-level Iodine-131 analysis were performed on each sample. The grab samples were collected from the locations listed below.

Location 5 = Mancos Dairy, Pittsboro, (Control Station), WNW sector,

>12mi. from site.

Location 102 = Goat Farm, W sector, 2.82 mi. from site.

A.6 BROADLEAF VEGETATION Monthly samples were collected when available during the growing season of May through October. A gamma analysis was performed on each sample. The samples were collected from the locations listed below.

Location 5 = Pittsboro (Control Station), NNW sector, >12 mi. from site.

Location 12 = SHNPP Site, SSW sector, 0.9 mi. from site.

Location 63 = SHNPP Site, SW sector, 0.6 mi. from site.

A.7 FOOD PRODUCTS Monthly samples were collected when available during the growing season at one location. A gamma analysis was performed on each sample. The samples were collected from the location listed below.

Location 97 = Granite Springs Farm (Control Station), NW sector, 19.1 mi. from site.

A.8 AQUATIC VEGETATION Annual samples were collected at each of the three locations. A gamma analysis was performed on each sample. The samples were collected from the locations listed below.

Location 26 = Harris Lake Spillway, S sector, 4.7 mi. from site.

Location 41 = Shoreline of Mixing Zone of Cooling Tower Blowdown Line, S sector, 3.8 mi. from site.

Location 61 = Harris Lake East of New Hill - Holleman Rd (Control Location), E sector, 2.5 mi. from site.

Appendix A - Page 6

A.9 FISH Semiannual samples of bottom feeders (catfish) and free swimmers (sunfish and largemouth bass) were collected at each of two locations. A gamma analysis was performed on the edible portions of each sample. The samples were collected from the locations listed below.

Location 44 = Site varies within the Harris Lake Location 45 = Site varies above Buckhorn Dam on Cape Fear River (Control Station)

A.10 SHORELINE SEDIMENT Semiannual samples were collected at each of two locations. A gamma analysis was performed on each sample following the drying and removal of rocks and clams. The samples were collected from the locations listed below.

Location 26 = 4.6 miles S Location 41 = 3.8 miles S A.11 BOTTOM SEDIMENT Semiannual samples were collected from the one location. A gamma analysis was performed on each sample following the drying and removal of rocks and clams.

The samples were collected from the location listed below.

Location 52 = Harris Lake in the Vicinity of the Mixing Zone of the Cooling Tower, S sector, 3.8 mi. from site.

A.12 DIRECT GAMMA RADIATION (TLD)

Thermoluminescent dosimeters (TLD) were collected quarterly at forty-one locations. A gamma exposure rate was determined for each TLD. TLD locations are listed in Table 2.1-B. The TLDs were placed as indicated below.

An inner ring of 18 TLDs, one in each meteorological sector in the general area of the site boundary.

An outer ring of 16 TLDs, one in each meteorological sector in the 6 to 8 kilometer range.

The remaining TLDs were placed in special interest areas such as population centers, residential areas, schools, and at a control location.

Appendix A - Page 7

A.13 ANNUAL LAND USE CENSUS An Annual Land Use Census was conducted to identify within a distance of 8 kilometers (5.0 miles) from the plant, the nearest location from the site boundary in each of the sixteen meteorological sectors, the following:

The Nearest Residence

The Nearest Garden greater than 50 square meters or 500 square feet

The Nearest Milk-giving Animal (cow, goat, etc.)

The Nearest Meat Animal (beef, hogs, etc.) was only identified at the nearest garden or closer in each sector, and poultry and egg laying animals were not classified as meat animals for the 2018 census.

The census was conducted during the growing season from July 24 - 25, 2018.

Results are shown in Table 3.12.3-1. No changes were made to the sampling procedures during 2018 as a result of the 2018 census.

V. GLOBAL POSITIONING SYSTEM (GPS) ANALYSIS The Shearon Harris Nuclear Plant centerline used for GPS measurements was referenced from the Shearon Harris Nuclear Plant Updated Final Safety Analysis Report (UFSAR), section 2.1.1.1, Specification of Location. Waypoint coordinates used for HNP GPS measurements were latitude 35°-38'-00"N and longitude 78°-57'-

22"W. Maps and tables were generated using North American Datum (NAD) 27. Data normally reflect accuracy to within 2 to 5 meters from point of measurement. All GPS field measurements were taken as close as possible to the item of interest. Distances for the locations are displayed using three significant figures.

Appendix A - Page 8

APPENDIX B RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

OF RESULTS 2018 Appendix B - Page 1

HARRIS NUCLEAR PLANT RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM DATA

SUMMARY

Shearon Harris Nuclear Power Plant Docket Numbers: STN 50-400 Wake County, North Carolina Calendar Year: 2018 Location w/Highest Annual Mean(2)

Medium or Pathway Type and Lower Limit All Indicator Control Locations No. of Sampled or Measured Total No. of of Detection Locations Name, Distance, Mean(2)(3) Mean(2)(3) Non-Routine (Unit of Measurement) Measurements (LLD)(1) Mean(2)(3) and Direction Range(2) Range(2) Report Performed Range(2) Meas.

Loc. # 5 Air Particulate Gross Beta See Table 2.2-C 1.90E-02 (416/416) 1.96E-02 (52/52) 1.89E-02 (52/52) 0 Loc. # 1 (pCi/m3) 468(4) 6.27E 3.12E-02 8.50E 2.91E-02 4.90E 2.98E-02 2.6 miles N See Table 2.2-C All less than LLD ----- ----- All less than LLD 0 Gamma 36 Air Radioiodine I-131 See Table 2.2-C All less than LLD ----- All less than LLD 0

(pCi/m3) 468(4)

Loc. # 46 Loc. # 58 Drinking Water(4)(8) Gross Beta 4 3.45E+00 (26/26) NE Harnett Metro 3.48E+00 (13/13) 3.68E+00 (13/13) 0 (pCi/l) 39 2.34E+00 - 5.15E+00 Water Treatment Plant 2.34E+00 - 5.15E+00 1.65E+00 - 6.57E+00

- Lillington 17.2 miles SSE Gamma See Table 2.2-C All less than LLD ----- ----- All less than LLD 0 39 Loc. # 51 Tritium(5) 2000(7) 3.27E+03 (13/26) Water Treatment 3.27E+03 (13/13) All less than LLD 0 39 2.40E+03 - 6.18E+03 Building on Site 2.4E+03 - 6.18E+03 Loc. # 26 Loc. # 43 Surface Water(4) Gross Beta 4 4.77E+00 (8/8) Harris Lake Spillway 5.12E+0 (4/4) 4.72E+00 (4/4) 0 (pCi/l) 12(9) 3.09E+00 - 6.67E+00 4.7 miles S 3.96E+00 - 6.67E+00 3.70E+00 - 5.93E+00 Gamma See Table 2.2-C All less than LLD ----- ----- All less than LLD 0 39 Loc. # 26 Tritium 2000(7) 7.46E+03 (13/26) Harris Lake Spillway 7.46E+3 (13/13) 0 All less than LLD 39 3.62E+03 - 1.28E+04 4.7 miles S 3.62E+03 - 1.28E+04 Appendix B - Page 2

HARRIS NUCLEAR PLANT RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM DATA

SUMMARY

(cont.)

Shearon Harris Nuclear Power Plant Docket Numbers: STN 50-400 Wake County, North Carolina Calendar Year: 2018 Location w/Highest Annual Mean(2)

Medium or Pathway Type and Lower Limit All Indicator Control Locations No. of Sampled or Measured Total No. of of Detection Locations Name, Distance, Mean(2)(3) Mean(2)(3) Non-Routine (Unit of Measurement) Measurements (LLD)(1) Mean(2)(3) and Direction Range(2) Range(2) Report Performed Range(2) Meas.

Ground Water Gamma See Table 2.2-C All less than LLD ----- ----- No Control 0 (pCi/l) 72 Loc. # 83 Tritium 2000(7) 4.84E+02 (21/72) On Site (BD-MW16) 1.10E+03 (4/4) No Control 0 72 1.74E+02 - 1.16E+03 along Cooling Tower 1.05E+03 - 1.16E+03 Blowdown line 1.6 miles SSW Milk I-131 See Table 2.2-C All less than LLD ----- All less than LLD 0

(pCi/l) 31 Gamma See Table 2.2-C 5.89E+00 (1/12) All less than LLD 0 102 5.89E+00 (1/12) 31 5.89E+00 - 5.89E+00 Goat Farm 5.89E+00 - 5.89E+00 Cs-137(10) 2.82 miles W Broadleaf Vegetation Gamma See Table 2.2-C All less than LLD ----- ----- All less than LLD 0 (pCi/kg, wet) 18(4)

Food Products Gamma See Table 2.2-C All less than LLD ----- ----- All less than LLD 0 (pCi/kg, wet) 28(4)(11)

Aquatic Vegetation Gamma See Table 2.2-C 8.31E+00 (1/2) Loc. # 41 8.31E+00 (1/1) All less than LLD Shoreline of Mixing 8.31E+00 - 8.31E+00 0 (pCi/kg, wet) 3 8.31E+00 - 8.31E+00 Cs-137(12) Zone of Cooling Tower Blowdown 3.8 miles S Fish Gamma See Table 2.2-C All less than LLD ----- ----- All less than LLD 0 (pCi/kg, wet) 12 Appendix B - Page 3

HARRIS NUCLEAR PLANT RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM DATA

SUMMARY

(cont.)

Shearon Harris Nuclear Plant Docket Numbers: STN 50-400 Wake County, North Carolina Calendar Year: 2018 Location w/Highest Annual Mean(2)

Medium or Pathway Type and Lower Limit All Indicator Control Locations No. of Sampled or Measured Total No. of of Detection Locations Name, Distance, Mean(2)(3) Mean(2)(3) Non-Routine (Unit of Measurement) Measurements (LLD)(1) Mean(2)(3) and Direction Range(2) Range(2) Report Performed Range(2) Meas.

Sediments -- Shoreline Gamma See Table 2.2-C All less than LLD ----- ----- No Control 0 (pCi/kg, dry) 4 Sediments -- Bottom Gamma See Table 2.2-C 1.77E+02 (2/2) Loc. # 52 1.77E+02 (2/2) 0 (pCi/kg, dry) 2 1.64E+02 - 1.90E+02 Harris Lake Cooling 1.64E+02 - 1.90E+02 No Control Co-60 Tower Mixing Zone 3.8 miles S Cs-137 See Table 2.2-C 1.25E+02 (2/2) Loc. # 52 1.25E+02 (2/2) 0 8.28E+01 - 1.67E+02 Harris Lake Cooling 8.28E+01 - 1.67E+02 No Control Tower Mixing Zone 3.8 miles S Direct Radiation (TLD) TLD Readout ----- 1.44E+01 (157/157) Loc. # 94 1.75E+01 (4/4) Loc. # 5 0 (mR per quarter)(6) 161(4) 9.94E+00 - 2.21E+01 Old US Hwy 1 1.58E+01 - 1.88E+01 1.61E+01 (4/4) 1.45E+01 - 1.77E+01 2.0 miles NW Appendix B - Page 4

Footnotes to Appendix B

1. The Lower Limit of Detection (LLD) is the smallest concentration of radioactive material in a sample that will yield a net count above system background, which will be detected with 95 percent probability and with only 5 percent probability of falsely concluding that a blank observation represents a "real" signal. Due to counting statistics and varying volumes, occasionally lower LLDs are achieved. Refer to Section 2.3.2 for an explanation of how LLD values were derived.

2. Mean and range are based on detectable measurements only.

3. The fractions of all samples with detectable activities at specific locations are indicated in parentheses.

4. Missing samples or surveillances are discussed in Appendix C or Appendix D.

5. Although quarterly composite samples are required, monthly composite samples are used to provide more frequent and sensitive analyses.

6. TLD exposure is reported in milliroentgen (mR) per standard quarter (91 days).

7. Tritium Lower Limit of Detection (LLD) is approximately 2.00E+2 pCi/L for samples that typically demonstrate activity less than the LLD.

8. Drinking Water 51 (DW-51) has been included, as of 2009, in the Data Summary even though it does not meet the EPA (Environmental Protection Agency) definition of a public drinking water supply.

9. Gross Beta samples were only collected and analyzed at Surface Water locations during the 1st Quarter of 2018.

10. Cs-137 identified in Goat Milk sample collected 29OCT2018 (NCR # 02243290). Follow-up trend evaluation of Cs-137 in REMP samples at HNP documented in AR # 02243634.

11. Food Product sampling was evaluated (AR # 02227572) and changed to one Mixed Food Product sample rather than three separate Food Product samples. 10SEP2018 was the first Mixed Food Product sample.

12. Cs-137 identified in AQV sample (Lyngbya) collected 10OCT2018 documented in NCR # 02236885.

Follow-up trend evaluation of Cs-137 in REMP samples at HNP documented in AR # 02243634.

Appendix B - Page 5

APPENDIX C SAMPLING DEVIATIONS

&

UNAVAILABLE ANALYSES 2018 Appendix C - Page 1

APPENDIX C HARRIS NUCLEAR PLANT SAMPLING DEVIATIONS & UNAVAILABLE ANALYSES DEVIATION & UNAVAILABLE REASON CODES BF Blown Fuse PM Preventive Maintenance CN Construction PO Power Outage FZ Sample Frozen PS Pump out of service / Undergoing repair IV Insufficient Volume SL Sample Loss/Lost due to Lab Accident IW Inclement Weather SM Motor / Rotor Seized LC Line Clog to Sampler SU Seasonally Unavailable OT Other TF Torn Filter PI Power Interrupt VN Vandalism C.1 SAMPLING DEVIATIONS Air Particulate and Air Radioiodine REMP weekly air samples (Air Particulate (AP) or Air Radioiodine (AR)) that experience any downtime during a surveillance period are reported as a Deviation and classified as a Sampling Deviation. However, the sample is counted and the data reported, whereas a Deviation with no available sample is classified as an Unavailable Analyses and does not have any data reported. The Harris REMP air samplers operated for a total of 99.5%

availability in 2018.

Scheduled Description & Corrective Location Collection Dates Code Action to Prevent Recurrence Action 81.36 hours4.166667e-4 days 0.01 hours 5.952381e-5 weeks 1.3698e-5 months of downtime due to blown fuse and seized 2 1/15 - 1/22/2018 PI pump. NCR # 02179183 1.16 hours1.851852e-4 days 0.00444 hours 2.645503e-5 weeks 6.088e-6 months of downtime due to power interruption from 5 1/15 - 1/22/2018 IW snow storm. NCR # 02179186 23.63 hours7.291667e-4 days 0.0175 hours 1.041667e-4 weeks 2.39715e-5 months of downtime due to power interruption 47 1/15 - 1/22/2018 IW from snow storm. NCR # 02179187 2.23 hours2.662037e-4 days 0.00639 hours 3.80291e-5 weeks 8.7515e-6 months of downtime due to unknown power 47 1/22 - 1/29/2018 PI interruption. NCR # 02180764 2.22 hours2.546296e-4 days 0.00611 hours 3.637566e-5 weeks 8.371e-6 months of downtime due to unknown power 26 1/22 - 1/29/2018 PI interruption. NCR # 02180766 3.71 hours8.217593e-4 days 0.0197 hours 1.173942e-4 weeks 2.70155e-5 months of downtime due to power interruption from 1 2/26 - 3/5/2018 PI high winds. NCR # 02189513 5.40 hours4.62963e-4 days 0.0111 hours 6.613757e-5 weeks 1.522e-5 months of downtime due to power interruption from 26 2/26 - 3/5/2018 PI high winds. NCR # 02189514 7.97 hours0.00112 days 0.0269 hours 1.603836e-4 weeks 3.69085e-5 months of downtime due to power interruption from 47 2/26 - 3/5/2018 PI high winds. NCR # 02189515 5.32 hours3.703704e-4 days 0.00889 hours 5.291005e-5 weeks 1.2176e-5 months of downtime due to power interruption from 5 6/18 - 6/25/2018 PI thunderstorms. NCR # 02215536 36.91 hours0.00105 days 0.0253 hours 1.50463e-4 weeks 3.46255e-5 months of downtime due to power interruption and 26 7/16 - 7/23/2018 PI tripped GFCI. NCR # 02220888 1.62 hours7.175926e-4 days 0.0172 hours 1.025132e-4 weeks 2.3591e-5 months of downtime due to power interruption from 5 7/23 - 7/30/2018 PI thunderstorms. NCR # 02222112 4.68 hours7.87037e-4 days 0.0189 hours 1.124339e-4 weeks 2.5874e-5 months of downtime due to power interruption from 26 7/23 - 7/30/2018 PI thunderstorms. NCR # 02222115 2.41 hours4.74537e-4 days 0.0114 hours 6.779101e-5 weeks 1.56005e-5 months of downtime due to power interruption from 1 9/10 - 9/17/2018 IW Hurricane Florence. NCR # 02231527 Appendix C - Page 2

2.29 hours3.356481e-4 days 0.00806 hours 4.794974e-5 weeks 1.10345e-5 months of downtime due to power interruption from 4 9/10 - 9/17/2018 IW Hurricane Florence. NCR # 02231530 7.40 hours4.62963e-4 days 0.0111 hours 6.613757e-5 weeks 1.522e-5 months of downtime due to power interruption from 5 9/10 - 9/17/2018 IW Hurricane Florence and tripped GFCI. NCR # 02231538 39.05 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months of downtime due to power interruption 26 9/10 - 9/17/2018 IW from Hurricane Florence. NCR # 02231540 29.53 hours6.134259e-4 days 0.0147 hours 8.763227e-5 weeks 2.01665e-5 months of downtime due to power interruption 1 10/8 - 10/15/2018 IW from Hurricane Michael. NCR # 02237487 20.82 hours9.490741e-4 days 0.0228 hours 1.35582e-4 weeks 3.1201e-5 months of downtime due to power interruption 4 10/8 - 10/15/2018 IW from Hurricane Michael. NCR # 02237497 0.25 hours2.893519e-4 days 0.00694 hours 4.133598e-5 weeks 9.5125e-6 months of downtime due to power interruption from 5 10/8 - 10/15/2018 IW Hurricane Michael. NCR # 02237499 87.67 hours7.75463e-4 days 0.0186 hours 1.107804e-4 weeks 2.54935e-5 months of downtime due to power interruption 26 10/8 - 10/15/2018 IW from Hurricane Michael and tripped GFCI. NCR # 02237492 Drinking Water and Surface Water REMP monthly drinking water samples (Drinking Water (DW)) or surface water samples (Surface Water (SW))

that experience any downtime during a surveillance period are reported as a Deviation and classified as a Sampling Deviation. The sample is counted and the data reported, whereas a Deviation with no available sample is classified as an Unavailable Analyses and does not have any data reported. The Harris REMP water samplers operated for a total of 99.3% availability in 2018.

Scheduled Description &

Location Collection Dates Code Action to Prevent Recurrence Corrective Action 103.7 hours8.101852e-5 days 0.00194 hours 1.157407e-5 weeks 2.6635e-6 months of total downtime for monthly composite due to freezing of water sampler and sampler tubing.

Grab Sample taken (NCR# 02176875 documents 26 12/26/17 - 1/22/2018 FZ 12/26/18 - 1/8/19 collection with 96 hours0.00111 days 0.0267 hours 1.587302e-4 weeks 3.6528e-5 months of downtime). NCR # 02179451 4.0 hours0 days 0 hours 0 weeks 0 months of downtime due to sampling program not stopping when programmed volume was input (see NCR

02186244 for equipment malfunction details) during 26 2/19 - 3/19/2018 OT HNP requested maintenance. NCR # 02193001 26 6/11 - 7/9/2018 PS 287.52 hours6.018519e-4 days 0.0144 hours 8.597884e-5 weeks 1.9786e-5 months of downtime due to pump rotor jamming. NCR # 02217791 Appendix C - Page 3

C.2 UNAVAILABLE ANALYSES TLDs Scheduled Description & Corrective Location Collection Dates Code Action to Prevent Recurrence Action TLD was found on the ground, not in its designated 3 1/10 - 4/11/2018 OT location - TLD not valid. NCR # 02197915 TLD was found on the ground, appeared to be by human intervention, not in its designated location - TLD not 33 7/11 - 10/10/2018 VN valid. NCR # 02236558 TLD was found on the ground, not in its designated location due to construction (tree removal) in the area -

56 7/11 - 10/10/2018 CN TLD not valid. NCR # 02236559 Appendix C - Page 4

APPENDIX D ANALYTICAL DEVIATIONS 2018 Appendix D - Page 1

APPENDIX D HARRIS NUCLEAR PLANT ANALYTICAL DEVIATIONS No Analytical deviations were incurred for the 2018 HNP Radiological Environmental Monitoring Program.

Appendix D - Page 2

APPENDIX E RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM RESULTS 2018 This appendix includes sample analysis report summaries and supportive data generated from each sample medium for 2018.

Appendix E - Page 1

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 1 Sample Point 1 [ INDICATOR - N @ 2.6 miles ]

Sample ID: 465964 Sample Dates: 1/2/2018 - 1/8/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.58E-02 3.60E-03 3.65E-03 Sample ID: 466164 Sample Dates: 1/8/2018 - 1/15/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.87E-02 2.93E-03 3.08E-03 Sample ID: 466362 Sample Dates: 1/15/2018 - 1/22/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.86E-02 3.26E-03 2.78E-03 Sample ID: 466950 Sample Dates: 1/22/2018 - 1/29/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.60E-02 2.66E-03 3.08E-03 Sample ID: 467309 Sample Dates: 1/29/2018 - 2/5/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.44E-02 2.67E-03 3.05E-03 Sample ID: 467618 Sample Dates: 2/5/2018 - 2/12/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.90E-02 2.93E-03 3.06E-03 Sample ID: 468410 Sample Dates: 2/12/2018 - 2/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.89E-02 3.00E-03 3.37E-03 Sample ID: 468731 Sample Dates: 2/19/2018 - 2/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.18E-02 2.77E-03 3.57E-03 Sample ID: 469543 Sample Dates: 2/26/2018 - 3/5/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.83E-02 3.04E-03 3.42E-03 Sample ID: 470565 Sample Dates: 3/5/2018 - 3/12/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.28E-02 3.15E-03 3.16E-03 Sample ID: 471132 Sample Dates: 3/12/2018 - 3/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.36E-02 3.11E-03 3.00E-03 Sample ID: 471687 Sample Dates: 3/19/2018 - 3/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.53E-02 2.42E-03 2.52E-03 Sample ID: 472465 Sample Dates: 3/26/2018 - 4/2/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.37E-02 2.70E-03 3.22E-03 Sample ID: 472474 Sample Dates: 1/2/2018 - 4/2/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.44E-03 0.00E+00 1.44E-03 Cs-137 <1.64E-03 0.00E+00 1.64E-03 Be-7 1.77E-01 4.22E-02 3.83E-02 K-40 <2.15E-02 0.00E+00 2.15E-02 Sample ID: 472949 Sample Dates: 4/2/2018 - 4/9/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.92E-02 2.81E-03 3.12E-03 Sample ID: 473240 Sample Dates: 4/9/2018 - 4/16/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.94E-02 2.72E-03 2.88E-03 Sample ID: 473605 Sample Dates: 4/16/2018 - 4/23/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.06E-02 2.83E-03 2.95E-03 Sample ID: 474125 Sample Dates: 4/23/2018 - 4/30/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.51E-02 2.86E-03 3.44E-03 Sample ID: 474503 Sample Dates: 4/30/2018 - 5/7/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.93E-02 3.20E-03 3.65E-03 Sample ID: 474862 Sample Dates: 5/7/2018 - 5/14/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.88E-02 3.43E-03 3.20E-03 Sample ID: 475186 Sample Dates: 5/14/2018 - 5/21/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.05E-02 2.51E-03 3.16E-03 Sample ID: 475511 Sample Dates: 5/21/2018 - 5/29/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.30E-02 2.58E-03 3.21E-03 Sample ID: 476336 Sample Dates: 5/29/2018 - 6/4/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.89E-02 2.78E-03 2.73E-03 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 2 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 1 Sample Point 1 [ INDICATOR - N @ 2.6 miles ]

Sample ID: 477348 Sample Dates: 6/4/2018 - 6/11/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.83E-02 3.47E-03 3.45E-03 Sample ID: 478078 Sample Dates: 6/11/2018 - 6/18/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.11E-02 3.12E-03 3.17E-03 Sample ID: 478398 Sample Dates: 6/18/2018 - 6/25/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.81E-02 3.03E-03 3.44E-03 Sample ID: 478749 Sample Dates: 6/25/2018 - 7/2/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.68E-02 2.85E-03 3.17E-03 Sample ID: 478758 Sample Dates: 4/2/2018 - 7/2/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.23E-03 0.00E+00 1.23E-03 Cs-137 <7.97E-04 0.00E+00 7.97E-04 Be-7 1.81E-01 3.80E-02 2.24E-02 K-40 <2.44E-02 0.00E+00 2.44E-02 Sample ID: 479030 Sample Dates: 7/2/2018 - 7/9/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.41E-02 2.80E-03 3.42E-03 Sample ID: 479851 Sample Dates: 7/9/2018 - 7/16/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.88E-02 3.54E-03 3.46E-03 Sample ID: 480221 Sample Dates: 7/16/2018 - 7/23/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.01E-02 3.02E-03 3.19E-03 Sample ID: 481048 Sample Dates: 7/23/2018 - 7/30/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.86E-02 2.69E-03 2.84E-03 Sample ID: 481492 Sample Dates: 7/30/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.08E-02 2.19E-03 2.65E-03 Sample ID: 481925 Sample Dates: 8/6/2018 - 8/13/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.23E-02 3.21E-03 3.32E-03 Sample ID: 482457 Sample Dates: 8/13/2018 - 8/20/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.20E-02 2.75E-03 2.63E-03 Sample ID: 482782 Sample Dates: 8/20/2018 - 8/27/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.14E-02 2.79E-03 2.79E-03 Sample ID: 483407 Sample Dates: 8/27/2018 - 9/4/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.87E-02 2.69E-03 2.81E-03 Sample ID: 483982 Sample Dates: 9/4/2018 - 9/10/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.11E-02 3.58E-03 4.01E-03 Sample ID: 484152 Sample Dates: 9/10/2018 - 9/17/2018 Nuclide Activity 2 Sigma Error MDA Beta 8.50E-03 2.27E-03 2.90E-03 Sample ID: 485003 Sample Dates: 9/17/2018 - 9/24/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.41E-02 3.23E-03 3.07E-03 Sample ID: 485233 Sample Dates: 9/24/2018 - 10/1/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.61E-02 2.78E-03 3.16E-03 Sample ID: 485457 Sample Dates: 7/2/2018 - 10/1/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.60E-03 0.00E+00 1.60E-03 Cs-137 <1.42E-03 0.00E+00 1.42E-03 Be-7 1.76E-01 3.75E-02 2.25E-02 K-40 <2.89E-02 0.00E+00 2.89E-02 Sample ID: 486124 Sample Dates: 10/1/2018 - 10/8/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.91E-02 3.47E-03 3.13E-03 Sample ID: 486673 Sample Dates: 10/8/2018 - 10/15/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.75E-02 3.22E-03 3.66E-03 Sample ID: 487712 Sample Dates: 10/15/2018 - 10/22/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.53E-02 3.27E-03 3.05E-03 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 3 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 1 Sample Point 1 [ INDICATOR - N @ 2.6 miles ]

Sample ID: 487959 Sample Dates: 10/22/2018 - 10/29/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.75E-02 2.49E-03 2.54E-03 Sample ID: 488444 Sample Dates: 10/29/2018 - 11/5/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.01E-02 2.73E-03 2.71E-03 Sample ID: 488820 Sample Dates: 11/5/2018 - 11/12/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.98E-02 2.95E-03 3.06E-03 Sample ID: 489124 Sample Dates: 11/12/2018 - 11/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.79E-02 2.69E-03 2.97E-03 Sample ID: 489709 Sample Dates: 11/19/2018 - 11/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.65E-02 3.23E-03 2.97E-03 Sample ID: 490125 Sample Dates: 11/26/2018 - 12/3/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.73E-02 2.74E-03 3.13E-03 Sample ID: 490771 Sample Dates: 12/3/2018 - 12/11/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.15E-02 2.75E-03 2.53E-03 Sample ID: 491151 Sample Dates: 12/11/2018 - 12/18/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.01E-02 3.02E-03 3.13E-03 Sample ID: 491455 Sample Dates: 12/18/2018 - 12/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.98E-02 2.44E-03 2.40E-03 Sample ID: 491711 Sample Dates: 12/26/2018 - 12/31/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.55E-02 3.89E-03 4.28E-03 Sample ID: 491720 Sample Dates: 10/1/2018 - 12/31/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <3.67E-04 0.00E+00 3.67E-04 Cs-137 <1.56E-03 0.00E+00 1.56E-03 Be-7 1.42E-01 2.18E-02 2.30E-02 K-40 <2.94E-02 0.00E+00 2.94E-02 Sample Point 2 [ INDICATOR - NNE @ 1.4 miles ]

Sample ID: 465965 Sample Dates: 1/2/2018 - 1/8/2018 Nuclide Activity 2 Sigma Error MDA Beta 3.08E-02 3.84E-03 3.65E-03 Sample ID: 466165 Sample Dates: 1/8/2018 - 1/15/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.69E-02 2.84E-03 3.08E-03 Sample ID: 466363 Sample Dates: 1/15/2018 - 1/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.88E-02 4.33E-03 5.22E-03 Sample ID: 466951 Sample Dates: 1/22/2018 - 1/29/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.52E-02 2.63E-03 3.09E-03 Sample ID: 467310 Sample Dates: 1/29/2018 - 2/5/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.41E-02 2.65E-03 3.05E-03 Sample ID: 467619 Sample Dates: 2/5/2018 - 2/12/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.76E-02 2.86E-03 3.06E-03 Sample ID: 468411 Sample Dates: 2/12/2018 - 2/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.68E-02 2.89E-03 3.36E-03 Sample ID: 468732 Sample Dates: 2/19/2018 - 2/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.25E-02 2.81E-03 3.58E-03 Sample ID: 469544 Sample Dates: 2/26/2018 - 3/5/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.15E-02 3.15E-03 3.35E-03 Sample ID: 470566 Sample Dates: 3/5/2018 - 3/12/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.92E-02 2.97E-03 3.16E-03 Sample ID: 471133 Sample Dates: 3/12/2018 - 3/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.64E-02 3.23E-03 2.99E-03 Sample ID: 471688 Sample Dates: 3/19/2018 - 3/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.48E-02 2.40E-03 2.53E-03 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 4 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 2 Sample Point 2 [ INDICATOR - NNE @ 1.4 miles ]

Sample ID: 472466 Sample Dates: 3/26/2018 - 4/2/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.38E-02 2.70E-03 3.22E-03 Sample ID: 472475 Sample Dates: 1/2/2018 - 4/2/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.73E-03 0.00E+00 1.73E-03 Cs-137 <1.66E-03 0.00E+00 1.66E-03 Be-7 1.15E-01 3.74E-02 4.21E-02 K-40 <2.84E-02 0.00E+00 2.84E-02 Sample ID: 472950 Sample Dates: 4/2/2018 - 4/9/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.86E-02 2.78E-03 3.12E-03 Sample ID: 473241 Sample Dates: 4/9/2018 - 4/16/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.02E-02 2.74E-03 2.88E-03 Sample ID: 473606 Sample Dates: 4/16/2018 - 4/23/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.99E-02 2.80E-03 2.96E-03 Sample ID: 474126 Sample Dates: 4/23/2018 - 4/30/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.32E-02 2.76E-03 3.44E-03 Sample ID: 474504 Sample Dates: 4/30/2018 - 5/7/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.36E-02 3.40E-03 3.65E-03 Sample ID: 474863 Sample Dates: 5/7/2018 - 5/14/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.51E-02 3.26E-03 3.19E-03 Sample ID: 475187 Sample Dates: 5/14/2018 - 5/21/2018 Nuclide Activity 2 Sigma Error MDA Beta 9.99E-03 2.49E-03 3.17E-03 Sample ID: 475512 Sample Dates: 5/21/2018 - 5/29/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.11E-02 2.48E-03 3.21E-03 Sample ID: 476337 Sample Dates: 5/29/2018 - 6/4/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.19E-02 2.40E-03 2.73E-03 Sample ID: 477349 Sample Dates: 6/4/2018 - 6/11/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.53E-02 3.34E-03 3.45E-03 Sample ID: 478079 Sample Dates: 6/11/2018 - 6/18/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.32E-02 3.23E-03 3.17E-03 Sample ID: 478399 Sample Dates: 6/18/2018 - 6/25/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.28E-02 3.26E-03 3.44E-03 Sample ID: 478750 Sample Dates: 6/25/2018 - 7/2/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.02E-02 3.02E-03 3.17E-03 Sample ID: 478759 Sample Dates: 4/2/2018 - 7/2/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <2.17E-03 0.00E+00 2.17E-03 Cs-137 <1.20E-03 0.00E+00 1.20E-03 Be-7 1.62E-01 3.74E-02 2.80E-02 K-40 2.04E-02 1.19E-02 4.62E-03 Sample ID: 479031 Sample Dates: 7/2/2018 - 7/9/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.71E-02 2.96E-03 3.42E-03 Sample ID: 479852 Sample Dates: 7/9/2018 - 7/16/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.71E-02 3.47E-03 3.46E-03 Sample ID: 480222 Sample Dates: 7/16/2018 - 7/23/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.83E-02 2.92E-03 3.19E-03 Sample ID: 481049 Sample Dates: 7/23/2018 - 7/30/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.83E-02 2.67E-03 2.85E-03 Sample ID: 481493 Sample Dates: 7/30/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.09E-02 2.20E-03 2.65E-03 Sample ID: 481926 Sample Dates: 8/6/2018 - 8/13/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.74E-02 2.97E-03 3.33E-03 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 5 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 2 Sample Point 2 [ INDICATOR - NNE @ 1.4 miles ]

Sample ID: 482458 Sample Dates: 8/13/2018 - 8/20/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.29E-02 2.79E-03 2.63E-03 Sample ID: 482783 Sample Dates: 8/20/2018 - 8/27/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.98E-02 2.72E-03 2.79E-03 Sample ID: 483408 Sample Dates: 8/27/2018 - 9/4/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.39E-02 2.45E-03 2.81E-03 Sample ID: 483983 Sample Dates: 9/4/2018 - 9/10/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.93E-02 3.48E-03 4.01E-03 Sample ID: 484153 Sample Dates: 9/10/2018 - 9/17/2018 Nuclide Activity 2 Sigma Error MDA Beta 6.27E-03 2.09E-03 2.86E-03 Sample ID: 485004 Sample Dates: 9/17/2018 - 9/24/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.28E-02 3.16E-03 3.07E-03 Sample ID: 485234 Sample Dates: 9/24/2018 - 10/1/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.86E-02 2.90E-03 3.15E-03 Sample ID: 485458 Sample Dates: 7/2/2018 - 10/1/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.52E-03 0.00E+00 1.52E-03 Cs-137 <1.25E-03 0.00E+00 1.25E-03 Be-7 1.51E-01 3.69E-02 2.92E-02 K-40 <3.49E-02 0.00E+00 3.49E-02 Sample ID: 486125 Sample Dates: 10/1/2018 - 10/8/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.97E-02 3.50E-03 3.13E-03 Sample ID: 486674 Sample Dates: 10/8/2018 - 10/15/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.90E-02 2.90E-03 3.02E-03 Sample ID: 487713 Sample Dates: 10/15/2018 - 10/22/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.23E-02 3.13E-03 3.05E-03 Sample ID: 487960 Sample Dates: 10/22/2018 - 10/29/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.74E-02 2.49E-03 2.53E-03 Sample ID: 488445 Sample Dates: 10/29/2018 - 11/5/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.97E-02 2.71E-03 2.71E-03 Sample ID: 488821 Sample Dates: 11/5/2018 - 11/12/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.81E-02 2.87E-03 3.06E-03 Sample ID: 489125 Sample Dates: 11/12/2018 - 11/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.62E-02 2.62E-03 2.97E-03 Sample ID: 489710 Sample Dates: 11/19/2018 - 11/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.88E-02 3.33E-03 2.96E-03 Sample ID: 490126 Sample Dates: 11/26/2018 - 12/3/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.87E-02 2.81E-03 3.13E-03 Sample ID: 490772 Sample Dates: 12/3/2018 - 12/11/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.07E-02 2.71E-03 2.53E-03 Sample ID: 491152 Sample Dates: 12/11/2018 - 12/18/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.87E-02 2.95E-03 3.13E-03 Sample ID: 491456 Sample Dates: 12/18/2018 - 12/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.50E-02 2.23E-03 2.40E-03 Sample ID: 491712 Sample Dates: 12/26/2018 - 12/31/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.47E-02 3.84E-03 4.28E-03 Sample ID: 491721 Sample Dates: 10/1/2018 - 12/31/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.50E-03 0.00E+00 1.50E-03 Cs-137 <3.09E-04 0.00E+00 3.09E-04 Be-7 1.13E-01 3.49E-02 3.81E-02 K-40 <2.72E-02 0.00E+00 2.72E-02 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 6 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 4 Sample Point 4 [ INDICATOR - NNE @ 3.1 miles ]

Sample ID: 465967 Sample Dates: 1/2/2018 - 1/8/2018 Nuclide Activity 2 Sigma Error MDA Beta 3.04E-02 3.80E-03 3.65E-03 Sample ID: 466167 Sample Dates: 1/8/2018 - 1/15/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.50E-02 2.73E-03 3.08E-03 Sample ID: 466365 Sample Dates: 1/15/2018 - 1/22/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.69E-02 3.20E-03 2.78E-03 Sample ID: 466953 Sample Dates: 1/22/2018 - 1/29/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.45E-02 2.58E-03 3.07E-03 Sample ID: 467312 Sample Dates: 1/29/2018 - 2/5/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.54E-02 2.72E-03 3.05E-03 Sample ID: 467621 Sample Dates: 2/5/2018 - 2/12/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.78E-02 2.87E-03 3.06E-03 Sample ID: 468413 Sample Dates: 2/12/2018 - 2/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.74E-02 2.99E-03 3.47E-03 Sample ID: 468734 Sample Dates: 2/19/2018 - 2/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 9.45E-03 2.58E-03 3.48E-03 Sample ID: 469546 Sample Dates: 2/26/2018 - 3/5/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.25E-02 3.18E-03 3.32E-03 Sample ID: 470568 Sample Dates: 3/5/2018 - 3/12/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.84E-02 2.93E-03 3.16E-03 Sample ID: 471135 Sample Dates: 3/12/2018 - 3/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.19E-02 3.00E-03 2.96E-03 Sample ID: 471690 Sample Dates: 3/19/2018 - 3/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.38E-02 2.37E-03 2.57E-03 Sample ID: 472468 Sample Dates: 3/26/2018 - 4/2/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.41E-02 2.73E-03 3.24E-03 Sample ID: 472477 Sample Dates: 1/2/2018 - 4/2/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.63E-03 0.00E+00 1.63E-03 Cs-137 <1.65E-03 0.00E+00 1.65E-03 Be-7 1.64E-01 3.97E-02 3.39E-02 K-40 1.06E-02 1.19E-02 1.84E-02 Sample ID: 472952 Sample Dates: 4/2/2018 - 4/9/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.15E-02 2.90E-03 3.11E-03 Sample ID: 473243 Sample Dates: 4/9/2018 - 4/16/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.01E-02 2.73E-03 2.86E-03 Sample ID: 473608 Sample Dates: 4/16/2018 - 4/23/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.92E-02 2.77E-03 2.97E-03 Sample ID: 474128 Sample Dates: 4/23/2018 - 4/30/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.18E-02 2.67E-03 3.41E-03 Sample ID: 474506 Sample Dates: 4/30/2018 - 5/7/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.07E-02 3.27E-03 3.67E-03 Sample ID: 474865 Sample Dates: 5/7/2018 - 5/14/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.67E-02 3.34E-03 3.20E-03 Sample ID: 475189 Sample Dates: 5/14/2018 - 5/21/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.05E-02 2.51E-03 3.15E-03 Sample ID: 475514 Sample Dates: 5/21/2018 - 5/29/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.10E-02 2.47E-03 3.21E-03 Sample ID: 476339 Sample Dates: 5/29/2018 - 6/4/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.73E-02 2.70E-03 2.73E-03 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 7 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 4 Sample Point 4 [ INDICATOR - NNE @ 3.1 miles ]

Sample ID: 477351 Sample Dates: 6/4/2018 - 6/11/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.30E-02 3.24E-03 3.45E-03 Sample ID: 478081 Sample Dates: 6/11/2018 - 6/18/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.97E-02 3.05E-03 3.17E-03 Sample ID: 478401 Sample Dates: 6/18/2018 - 6/25/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.08E-02 3.17E-03 3.44E-03 Sample ID: 478752 Sample Dates: 6/25/2018 - 7/2/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.04E-02 3.06E-03 3.20E-03 Sample ID: 478761 Sample Dates: 4/2/2018 - 7/2/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.60E-03 0.00E+00 1.60E-03 Cs-137 <1.01E-03 0.00E+00 1.01E-03 Be-7 1.40E-01 3.63E-02 3.40E-02 K-40 <2.34E-02 0.00E+00 2.34E-02 Sample ID: 479033 Sample Dates: 7/2/2018 - 7/9/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.61E-02 2.89E-03 3.39E-03 Sample ID: 479854 Sample Dates: 7/9/2018 - 7/16/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.51E-02 3.40E-03 3.48E-03 Sample ID: 480224 Sample Dates: 7/16/2018 - 7/23/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.95E-02 2.98E-03 3.17E-03 Sample ID: 481051 Sample Dates: 7/23/2018 - 7/30/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.02E-02 2.76E-03 2.84E-03 Sample ID: 481495 Sample Dates: 7/30/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.10E-02 2.20E-03 2.66E-03 Sample ID: 481928 Sample Dates: 8/6/2018 - 8/13/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.29E-02 3.22E-03 3.32E-03 Sample ID: 482460 Sample Dates: 8/13/2018 - 8/20/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.44E-02 2.86E-03 2.63E-03 Sample ID: 482785 Sample Dates: 8/20/2018 - 8/27/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.99E-02 2.72E-03 2.79E-03 Sample ID: 483410 Sample Dates: 8/27/2018 - 9/4/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.72E-02 2.62E-03 2.81E-03 Sample ID: 483985 Sample Dates: 9/4/2018 - 9/10/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.05E-02 3.54E-03 4.01E-03 Sample ID: 484155 Sample Dates: 9/10/2018 - 9/17/2018 Nuclide Activity 2 Sigma Error MDA Beta 7.34E-03 2.20E-03 2.90E-03 Sample ID: 485006 Sample Dates: 9/17/2018 - 9/24/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.70E-02 3.37E-03 3.09E-03 Sample ID: 485236 Sample Dates: 9/24/2018 - 10/1/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.05E-02 3.09E-03 3.29E-03 Sample ID: 485460 Sample Dates: 7/2/2018 - 10/1/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.67E-03 0.00E+00 1.67E-03 Cs-137 <1.23E-03 0.00E+00 1.23E-03 Be-7 1.50E-01 3.86E-02 3.60E-02 K-40 <2.25E-02 0.00E+00 2.25E-02 Sample ID: 486127 Sample Dates: 10/1/2018 - 10/8/2018 Nuclide Activity 2 Sigma Error MDA Beta 3.10E-02 3.45E-03 2.99E-03 Sample ID: 486676 Sample Dates: 10/8/2018 - 10/15/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.78E-02 3.09E-03 3.43E-03 Sample ID: 487715 Sample Dates: 10/15/2018 - 10/22/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.58E-02 3.30E-03 3.05E-03 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 8 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 4 Sample Point 4 [ INDICATOR - NNE @ 3.1 miles ]

Sample ID: 487962 Sample Dates: 10/22/2018 - 10/29/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.77E-02 2.51E-03 2.54E-03 Sample ID: 488447 Sample Dates: 10/29/2018 - 11/5/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.82E-02 2.64E-03 2.70E-03 Sample ID: 488823 Sample Dates: 11/5/2018 - 11/12/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.85E-02 2.89E-03 3.06E-03 Sample ID: 489127 Sample Dates: 11/12/2018 - 11/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.76E-02 2.68E-03 2.97E-03 Sample ID: 489712 Sample Dates: 11/19/2018 - 11/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.70E-02 3.27E-03 2.99E-03 Sample ID: 490128 Sample Dates: 11/26/2018 - 12/3/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.28E-02 2.97E-03 3.12E-03 Sample ID: 490774 Sample Dates: 12/3/2018 - 12/11/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.14E-02 2.74E-03 2.53E-03 Sample ID: 491154 Sample Dates: 12/11/2018 - 12/18/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.17E-02 3.10E-03 3.13E-03 Sample ID: 491458 Sample Dates: 12/18/2018 - 12/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.98E-02 2.45E-03 2.40E-03 Sample ID: 491714 Sample Dates: 12/26/2018 - 12/31/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.80E-02 4.00E-03 4.28E-03 Sample ID: 491723 Sample Dates: 10/1/2018 - 12/31/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.63E-03 0.00E+00 1.63E-03 Cs-137 <1.34E-03 0.00E+00 1.34E-03 Be-7 1.19E-01 3.20E-02 2.71E-02 K-40 <3.19E-02 0.00E+00 3.19E-02 Sample Point 5 [ CONTROL - WNW @ 12 miles ]

Sample ID: 465969 Sample Dates: 1/2/2018 - 1/8/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.75E-02 3.67E-03 3.64E-03 Sample ID: 466169 Sample Dates: 1/8/2018 - 1/15/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.66E-02 2.81E-03 3.08E-03 Sample ID: 466367 Sample Dates: 1/15/2018 - 1/22/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.70E-02 3.23E-03 2.83E-03 Sample ID: 466955 Sample Dates: 1/22/2018 - 1/29/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.42E-02 2.56E-03 3.05E-03 Sample ID: 467314 Sample Dates: 1/29/2018 - 2/5/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.56E-02 2.73E-03 3.05E-03 Sample ID: 467623 Sample Dates: 2/5/2018 - 2/12/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.66E-02 2.81E-03 3.06E-03 Sample ID: 468415 Sample Dates: 2/12/2018 - 2/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.67E-02 2.91E-03 3.39E-03 Sample ID: 468736 Sample Dates: 2/19/2018 - 2/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.25E-02 2.79E-03 3.55E-03 Sample ID: 469548 Sample Dates: 2/26/2018 - 3/5/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.15E-02 3.11E-03 3.28E-03 Sample ID: 470570 Sample Dates: 3/5/2018 - 3/12/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.44E-02 3.26E-03 3.22E-03 Sample ID: 471137 Sample Dates: 3/12/2018 - 3/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.30E-02 3.09E-03 3.02E-03 Sample ID: 471692 Sample Dates: 3/19/2018 - 3/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.46E-02 2.37E-03 2.50E-03 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 9 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 5 Sample Point 5 [ CONTROL - WNW @ 12 miles ]

Sample ID: 472470 Sample Dates: 3/26/2018 - 4/2/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.40E-02 2.72E-03 3.22E-03 Sample ID: 472479 Sample Dates: 1/2/2018 - 4/2/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.61E-03 0.00E+00 1.61E-03 Cs-137 <1.32E-03 0.00E+00 1.32E-03 Be-7 1.64E-01 3.76E-02 1.49E-02 K-40 <3.21E-02 0.00E+00 3.21E-02 Sample ID: 472954 Sample Dates: 4/2/2018 - 4/9/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.01E-02 2.85E-03 3.12E-03 Sample ID: 473245 Sample Dates: 4/9/2018 - 4/16/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.29E-02 2.88E-03 2.91E-03 Sample ID: 473610 Sample Dates: 4/16/2018 - 4/23/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.74E-02 2.65E-03 2.90E-03 Sample ID: 474130 Sample Dates: 4/23/2018 - 4/30/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.45E-02 2.84E-03 3.46E-03 Sample ID: 474508 Sample Dates: 4/30/2018 - 5/7/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.57E-02 3.49E-03 3.64E-03 Sample ID: 474867 Sample Dates: 5/7/2018 - 5/14/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.43E-02 3.27E-03 3.25E-03 Sample ID: 475191 Sample Dates: 5/14/2018 - 5/21/2018 Nuclide Activity 2 Sigma Error MDA Beta 9.46E-03 2.43E-03 3.13E-03 Sample ID: 475516 Sample Dates: 5/21/2018 - 5/29/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.03E-02 2.44E-03 3.21E-03 Sample ID: 476341 Sample Dates: 5/29/2018 - 6/4/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.51E-02 2.58E-03 2.73E-03 Sample ID: 477353 Sample Dates: 6/4/2018 - 6/11/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.26E-02 3.25E-03 3.50E-03 Sample ID: 478083 Sample Dates: 6/11/2018 - 6/18/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.46E-02 3.26E-03 3.12E-03 Sample ID: 478403 Sample Dates: 6/18/2018 - 6/25/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.40E-02 3.39E-03 3.55E-03 Sample ID: 478754 Sample Dates: 6/25/2018 - 7/2/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.90E-02 2.97E-03 3.17E-03 Sample ID: 478763 Sample Dates: 4/2/2018 - 7/2/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <2.15E-03 0.00E+00 2.15E-03 Cs-137 <1.19E-03 0.00E+00 1.19E-03 Be-7 1.69E-01 3.80E-02 2.73E-02 K-40 <2.53E-02 0.00E+00 2.53E-02 Sample ID: 479035 Sample Dates: 7/2/2018 - 7/9/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.63E-02 2.92E-03 3.42E-03 Sample ID: 479856 Sample Dates: 7/9/2018 - 7/16/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.39E-02 3.32E-03 3.46E-03 Sample ID: 480226 Sample Dates: 7/16/2018 - 7/23/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.05E-02 3.03E-03 3.18E-03 Sample ID: 481053 Sample Dates: 7/23/2018 - 7/30/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.06E-02 2.80E-03 2.87E-03 Sample ID: 481497 Sample Dates: 7/30/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA Beta 9.90E-03 2.14E-03 2.64E-03 Sample ID: 481930 Sample Dates: 8/6/2018 - 8/13/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.95E-02 3.08E-03 3.33E-03 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 10 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 5 Sample Point 5 [ CONTROL - WNW @ 12 miles ]

Sample ID: 482462 Sample Dates: 8/13/2018 - 8/20/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.37E-02 2.83E-03 2.63E-03 Sample ID: 482787 Sample Dates: 8/20/2018 - 8/27/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.68E-02 2.58E-03 2.78E-03 Sample ID: 483412 Sample Dates: 8/27/2018 - 9/4/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.56E-02 2.54E-03 2.82E-03 Sample ID: 483987 Sample Dates: 9/4/2018 - 9/10/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.82E-02 3.42E-03 4.01E-03 Sample ID: 484157 Sample Dates: 9/10/2018 - 9/17/2018 Nuclide Activity 2 Sigma Error MDA Beta 4.90E-03 2.07E-03 2.99E-03 Sample ID: 485008 Sample Dates: 9/17/2018 - 9/24/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.94E-02 3.00E-03 3.08E-03 Sample ID: 485238 Sample Dates: 9/24/2018 - 10/1/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.69E-02 2.85E-03 3.20E-03 Sample ID: 485462 Sample Dates: 7/2/2018 - 10/1/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.42E-03 0.00E+00 1.42E-03 Cs-137 <1.17E-03 0.00E+00 1.17E-03 Be-7 1.35E-01 3.32E-02 2.51E-02 K-40 <3.06E-02 0.00E+00 3.06E-02 Sample ID: 486129 Sample Dates: 10/1/2018 - 10/8/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.98E-02 3.47E-03 3.08E-03 Sample ID: 486678 Sample Dates: 10/8/2018 - 10/15/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.69E-02 2.80E-03 3.04E-03 Sample ID: 487717 Sample Dates: 10/15/2018 - 10/22/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.53E-02 3.27E-03 3.06E-03 Sample ID: 487964 Sample Dates: 10/22/2018 - 10/29/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.69E-02 2.49E-03 2.57E-03 Sample ID: 488449 Sample Dates: 10/29/2018 - 11/5/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.77E-02 2.59E-03 2.67E-03 Sample ID: 488825 Sample Dates: 11/5/2018 - 11/12/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.66E-02 2.80E-03 3.06E-03 Sample ID: 489129 Sample Dates: 11/12/2018 - 11/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.70E-02 2.66E-03 2.97E-03 Sample ID: 489714 Sample Dates: 11/19/2018 - 11/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.61E-02 3.23E-03 2.99E-03 Sample ID: 490130 Sample Dates: 11/26/2018 - 12/3/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.87E-02 2.79E-03 3.10E-03 Sample ID: 490776 Sample Dates: 12/3/2018 - 12/11/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.69E-02 2.51E-03 2.53E-03 Sample ID: 491156 Sample Dates: 12/11/2018 - 12/18/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.45E-02 3.22E-03 3.13E-03 Sample ID: 491460 Sample Dates: 12/18/2018 - 12/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.59E-02 2.30E-03 2.44E-03 Sample ID: 491716 Sample Dates: 12/26/2018 - 12/31/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.20E-02 3.64E-03 4.16E-03 Sample ID: 491725 Sample Dates: 10/1/2018 - 12/31/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.59E-03 0.00E+00 1.59E-03 Cs-137 <3.28E-04 0.00E+00 3.28E-04 Be-7 1.25E-01 3.34E-02 2.62E-02 K-40 <2.74E-02 0.00E+00 2.74E-02 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 11 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 26 Sample Point 26 [ INDICATOR - S @ 4.7 miles ]

Sample ID: 465966 Sample Dates: 1/2/2018 - 1/8/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.92E-02 3.78E-03 3.68E-03 Sample ID: 466166 Sample Dates: 1/8/2018 - 1/15/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.85E-02 2.89E-03 3.04E-03 Sample ID: 466364 Sample Dates: 1/15/2018 - 1/22/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.70E-02 3.22E-03 2.81E-03 Sample ID: 466952 Sample Dates: 1/22/2018 - 1/29/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.31E-02 2.52E-03 3.09E-03 Sample ID: 467311 Sample Dates: 1/29/2018 - 2/5/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.41E-02 2.67E-03 3.06E-03 Sample ID: 467620 Sample Dates: 2/5/2018 - 2/12/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.02E-02 2.99E-03 3.05E-03 Sample ID: 468412 Sample Dates: 2/12/2018 - 2/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.51E-02 2.85E-03 3.43E-03 Sample ID: 468733 Sample Dates: 2/19/2018 - 2/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.07E-02 2.66E-03 3.50E-03 Sample ID: 469545 Sample Dates: 2/26/2018 - 3/5/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.22E-02 3.20E-03 3.37E-03 Sample ID: 470567 Sample Dates: 3/5/2018 - 3/12/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.02E-02 3.07E-03 3.24E-03 Sample ID: 471134 Sample Dates: 3/12/2018 - 3/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.26E-02 3.07E-03 3.02E-03 Sample ID: 471689 Sample Dates: 3/19/2018 - 3/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.54E-02 2.42E-03 2.51E-03 Sample ID: 472467 Sample Dates: 3/26/2018 - 4/2/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.47E-02 2.76E-03 3.24E-03 Sample ID: 472476 Sample Dates: 1/2/2018 - 4/2/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.42E-03 0.00E+00 1.42E-03 Cs-137 <1.16E-03 0.00E+00 1.16E-03 Be-7 1.43E-01 3.85E-02 3.81E-02 K-40 <2.58E-02 0.00E+00 2.58E-02 Sample ID: 472951 Sample Dates: 4/2/2018 - 4/9/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.05E-02 2.86E-03 3.11E-03 Sample ID: 473242 Sample Dates: 4/9/2018 - 4/16/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.14E-02 2.81E-03 2.89E-03 Sample ID: 473607 Sample Dates: 4/16/2018 - 4/23/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.19E-02 2.87E-03 2.92E-03 Sample ID: 474127 Sample Dates: 4/23/2018 - 4/30/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.35E-02 2.80E-03 3.48E-03 Sample ID: 474505 Sample Dates: 4/30/2018 - 5/7/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.22E-02 3.27E-03 3.55E-03 Sample ID: 474864 Sample Dates: 5/7/2018 - 5/14/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.63E-02 3.38E-03 3.28E-03 Sample ID: 475188 Sample Dates: 5/14/2018 - 5/21/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.16E-02 2.57E-03 3.15E-03 Sample ID: 475513 Sample Dates: 5/21/2018 - 5/29/2018 Nuclide Activity 2 Sigma Error MDA Beta 9.27E-03 2.39E-03 3.23E-03 Sample ID: 476338 Sample Dates: 5/29/2018 - 6/4/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.61E-02 2.56E-03 2.60E-03 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 12 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 26 Sample Point 26 [ INDICATOR - S @ 4.7 miles ]

Sample ID: 477350 Sample Dates: 6/4/2018 - 6/11/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.04E-02 3.23E-03 3.62E-03 Sample ID: 478080 Sample Dates: 6/11/2018 - 6/18/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.18E-02 3.14E-03 3.13E-03 Sample ID: 478400 Sample Dates: 6/18/2018 - 6/25/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.84E-02 3.06E-03 3.46E-03 Sample ID: 478751 Sample Dates: 6/25/2018 - 7/2/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.53E-02 2.75E-03 3.14E-03 Sample ID: 478760 Sample Dates: 4/2/2018 - 7/2/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.39E-03 0.00E+00 1.39E-03 Cs-137 <1.68E-03 0.00E+00 1.68E-03 Be-7 1.25E-01 3.26E-02 2.77E-02 K-40 <2.68E-02 0.00E+00 2.68E-02 Sample ID: 479032 Sample Dates: 7/2/2018 - 7/9/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.49E-02 2.88E-03 3.47E-03 Sample ID: 479853 Sample Dates: 7/9/2018 - 7/16/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.45E-02 3.33E-03 3.42E-03 Sample ID: 480223 Sample Dates: 7/16/2018 - 7/23/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.70E-02 3.42E-03 4.10E-03 Sample ID: 481050 Sample Dates: 7/23/2018 - 7/30/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.93E-02 2.76E-03 2.90E-03 Sample ID: 481494 Sample Dates: 7/30/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.03E-02 2.17E-03 2.66E-03 Sample ID: 481927 Sample Dates: 8/6/2018 - 8/13/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.72E-02 2.94E-03 3.32E-03 Sample ID: 482459 Sample Dates: 8/13/2018 - 8/20/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.20E-02 2.77E-03 2.66E-03 Sample ID: 482784 Sample Dates: 8/20/2018 - 8/27/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.74E-02 2.59E-03 2.77E-03 Sample ID: 483409 Sample Dates: 8/27/2018 - 9/4/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.45E-02 2.49E-03 2.84E-03 Sample ID: 483984 Sample Dates: 9/4/2018 - 9/10/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.23E-02 3.59E-03 3.92E-03 Sample ID: 484154 Sample Dates: 9/10/2018 - 9/17/2018 Nuclide Activity 2 Sigma Error MDA Beta 8.99E-03 2.81E-03 3.78E-03 Sample ID: 485005 Sample Dates: 9/17/2018 - 9/24/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.30E-02 3.16E-03 3.06E-03 Sample ID: 485235 Sample Dates: 9/24/2018 - 10/1/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.59E-02 2.79E-03 3.17E-03 Sample ID: 485459 Sample Dates: 7/2/2018 - 10/1/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <2.33E-03 0.00E+00 2.33E-03 Cs-137 <8.42E-04 0.00E+00 8.42E-04 Be-7 1.33E-01 3.42E-02 2.73E-02 K-40 <3.27E-02 0.00E+00 3.27E-02 Sample ID: 486126 Sample Dates: 10/1/2018 - 10/8/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.95E-02 3.42E-03 3.05E-03 Sample ID: 486675 Sample Dates: 10/8/2018 - 10/11/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.53E-02 4.82E-03 6.60E-03 Sample ID: 487714 Sample Dates: 10/15/2018 - 10/22/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.73E-02 3.34E-03 3.02E-03 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 13 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 26 Sample Point 26 [ INDICATOR - S @ 4.7 miles ]

Sample ID: 487961 Sample Dates: 10/22/2018 - 10/29/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.64E-02 2.46E-03 2.57E-03 Sample ID: 488446 Sample Dates: 10/29/2018 - 11/5/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.88E-02 2.64E-03 2.66E-03 Sample ID: 488822 Sample Dates: 11/5/2018 - 11/12/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.62E-02 2.78E-03 3.07E-03 Sample ID: 489126 Sample Dates: 11/12/2018 - 11/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.64E-02 2.62E-03 2.97E-03 Sample ID: 489711 Sample Dates: 11/19/2018 - 11/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.46E-02 3.15E-03 2.98E-03 Sample ID: 490127 Sample Dates: 11/26/2018 - 12/3/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.81E-02 2.77E-03 3.12E-03 Sample ID: 490773 Sample Dates: 12/3/2018 - 12/11/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.83E-02 2.59E-03 2.53E-03 Sample ID: 491153 Sample Dates: 12/11/2018 - 12/18/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.13E-02 3.07E-03 3.13E-03 Sample ID: 491457 Sample Dates: 12/18/2018 - 12/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.64E-02 2.31E-03 2.43E-03 Sample ID: 491713 Sample Dates: 12/26/2018 - 12/31/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.83E-02 3.46E-03 4.16E-03 Sample ID: 491722 Sample Dates: 10/1/2018 - 12/31/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.02E-03 0.00E+00 1.02E-03 Cs-137 <1.36E-03 0.00E+00 1.36E-03 Be-7 1.11E-01 3.23E-02 3.11E-02 K-40 <2.60E-02 0.00E+00 2.60E-02 Sample Point 47 [ INDICATOR - SSW @ 3.4 miles ]

Sample ID: 465968 Sample Dates: 1/2/2018 - 1/8/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.33E-02 3.50E-03 3.68E-03 Sample ID: 466168 Sample Dates: 1/8/2018 - 1/15/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.78E-02 2.86E-03 3.04E-03 Sample ID: 466366 Sample Dates: 1/15/2018 - 1/22/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.68E-02 3.53E-03 3.26E-03 Sample ID: 466954 Sample Dates: 1/22/2018 - 1/29/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.62E-02 2.67E-03 3.08E-03 Sample ID: 467313 Sample Dates: 1/29/2018 - 2/5/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.27E-02 2.58E-03 3.06E-03 Sample ID: 467622 Sample Dates: 2/5/2018 - 2/12/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.84E-02 2.90E-03 3.05E-03 Sample ID: 468414 Sample Dates: 2/12/2018 - 2/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.42E-02 2.80E-03 3.43E-03 Sample ID: 468735 Sample Dates: 2/19/2018 - 2/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.05E-02 2.65E-03 3.50E-03 Sample ID: 469547 Sample Dates: 2/26/2018 - 3/5/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.95E-02 3.08E-03 3.40E-03 Sample ID: 470569 Sample Dates: 3/5/2018 - 3/12/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.10E-02 3.12E-03 3.26E-03 Sample ID: 471136 Sample Dates: 3/12/2018 - 3/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.43E-02 3.15E-03 3.02E-03 Sample ID: 471691 Sample Dates: 3/19/2018 - 3/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.41E-02 2.35E-03 2.51E-03 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 14 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 47 Sample Point 47 [ INDICATOR - SSW @ 3.4 miles ]

Sample ID: 472469 Sample Dates: 3/26/2018 - 4/2/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.32E-02 2.69E-03 3.24E-03 Sample ID: 472478 Sample Dates: 1/2/2018 - 4/2/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.29E-03 0.00E+00 1.29E-03 Cs-137 <1.22E-03 0.00E+00 1.22E-03 Be-7 1.27E-01 3.62E-02 3.53E-02 K-40 <2.73E-02 0.00E+00 2.73E-02 Sample ID: 472953 Sample Dates: 4/2/2018 - 4/9/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.05E-02 2.87E-03 3.11E-03 Sample ID: 473244 Sample Dates: 4/9/2018 - 4/16/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.93E-02 2.72E-03 2.89E-03 Sample ID: 473609 Sample Dates: 4/16/2018 - 4/23/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.27E-02 2.91E-03 2.93E-03 Sample ID: 474129 Sample Dates: 4/23/2018 - 4/30/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.29E-02 2.76E-03 3.48E-03 Sample ID: 474507 Sample Dates: 4/30/2018 - 5/7/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.30E-02 3.30E-03 3.55E-03 Sample ID: 474866 Sample Dates: 5/7/2018 - 5/14/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.78E-02 3.45E-03 3.28E-03 Sample ID: 475190 Sample Dates: 5/14/2018 - 5/21/2018 Nuclide Activity 2 Sigma Error MDA Beta 9.67E-03 2.45E-03 3.14E-03 Sample ID: 475515 Sample Dates: 5/21/2018 - 5/29/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.04E-02 2.45E-03 3.23E-03 Sample ID: 476340 Sample Dates: 5/29/2018 - 6/4/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.36E-02 2.42E-03 2.61E-03 Sample ID: 477352 Sample Dates: 6/4/2018 - 6/11/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.26E-02 3.28E-03 3.54E-03 Sample ID: 478082 Sample Dates: 6/11/2018 - 6/18/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.23E-02 3.20E-03 3.19E-03 Sample ID: 478402 Sample Dates: 6/18/2018 - 6/25/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.21E-02 3.24E-03 3.46E-03 Sample ID: 478753 Sample Dates: 6/25/2018 - 7/2/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.81E-02 2.91E-03 3.14E-03 Sample ID: 478762 Sample Dates: 4/2/2018 - 7/2/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <2.25E-03 0.00E+00 2.25E-03 Cs-137 <1.25E-03 0.00E+00 1.25E-03 Be-7 1.17E-01 3.65E-02 4.06E-02 K-40 1.54E-02 1.19E-02 1.41E-02 Sample ID: 479034 Sample Dates: 7/2/2018 - 7/9/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.62E-02 2.95E-03 3.47E-03 Sample ID: 479855 Sample Dates: 7/9/2018 - 7/16/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.64E-02 3.41E-03 3.42E-03 Sample ID: 480225 Sample Dates: 7/16/2018 - 7/23/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.18E-02 3.11E-03 3.20E-03 Sample ID: 481052 Sample Dates: 7/23/2018 - 7/30/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.07E-02 2.77E-03 2.82E-03 Sample ID: 481496 Sample Dates: 7/30/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.15E-02 2.24E-03 2.66E-03 Sample ID: 481929 Sample Dates: 8/6/2018 - 8/13/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.35E-02 3.26E-03 3.31E-03 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 15 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 47 Sample Point 47 [ INDICATOR - SSW @ 3.4 miles ]

Sample ID: 482461 Sample Dates: 8/13/2018 - 8/20/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.24E-02 2.78E-03 2.66E-03 Sample ID: 482786 Sample Dates: 8/20/2018 - 8/27/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.64E-02 2.55E-03 2.77E-03 Sample ID: 483411 Sample Dates: 8/27/2018 - 9/4/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.59E-02 2.58E-03 2.84E-03 Sample ID: 483986 Sample Dates: 9/4/2018 - 9/10/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.79E-02 3.36E-03 3.92E-03 Sample ID: 484156 Sample Dates: 9/10/2018 - 9/17/2018 Nuclide Activity 2 Sigma Error MDA Beta 9.20E-03 2.32E-03 2.90E-03 Sample ID: 485007 Sample Dates: 9/17/2018 - 9/24/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.70E-02 3.35E-03 3.06E-03 Sample ID: 485237 Sample Dates: 9/24/2018 - 10/1/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.44E-02 2.70E-03 3.17E-03 Sample ID: 485461 Sample Dates: 7/2/2018 - 10/1/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <2.21E-03 0.00E+00 2.21E-03 Cs-137 <1.45E-03 0.00E+00 1.45E-03 Be-7 1.60E-01 4.15E-02 4.03E-02 K-40 <1.96E-02 0.00E+00 1.96E-02 Sample ID: 486128 Sample Dates: 10/1/2018 - 10/8/2018 Nuclide Activity 2 Sigma Error MDA Beta 3.12E-02 3.51E-03 3.05E-03 Sample ID: 486677 Sample Dates: 10/8/2018 - 10/15/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.53E-02 2.75E-03 3.09E-03 Sample ID: 487716 Sample Dates: 10/15/2018 - 10/22/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.42E-02 3.21E-03 3.04E-03 Sample ID: 487963 Sample Dates: 10/22/2018 - 10/29/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.59E-02 2.43E-03 2.57E-03 Sample ID: 488448 Sample Dates: 10/29/2018 - 11/5/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.03E-02 2.71E-03 2.66E-03 Sample ID: 488824 Sample Dates: 11/5/2018 - 11/12/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.77E-02 2.86E-03 3.07E-03 Sample ID: 489128 Sample Dates: 11/12/2018 - 11/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.56E-02 2.58E-03 2.97E-03 Sample ID: 489713 Sample Dates: 11/19/2018 - 11/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.44E-02 3.15E-03 2.98E-03 Sample ID: 490129 Sample Dates: 11/26/2018 - 12/3/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.75E-02 2.75E-03 3.12E-03 Sample ID: 490775 Sample Dates: 12/3/2018 - 12/11/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.61E-02 2.47E-03 2.53E-03 Sample ID: 491155 Sample Dates: 12/11/2018 - 12/18/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.93E-02 2.97E-03 3.13E-03 Sample ID: 491459 Sample Dates: 12/18/2018 - 12/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.62E-02 2.30E-03 2.43E-03 Sample ID: 491715 Sample Dates: 12/26/2018 - 12/31/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.20E-02 3.66E-03 4.17E-03 Sample ID: 491724 Sample Dates: 10/1/2018 - 12/31/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.02E-03 0.00E+00 1.02E-03 Cs-137 <1.71E-03 0.00E+00 1.71E-03 Be-7 9.85E-02 3.08E-02 3.07E-02 K-40 <2.42E-02 0.00E+00 2.42E-02 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 16 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 63 Sample Point 63 [ INDICATOR - SW @ 0.6 miles ]

Sample ID: 465970 Sample Dates: 1/2/2018 - 1/8/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.74E-02 3.68E-03 3.65E-03 Sample ID: 466170 Sample Dates: 1/8/2018 - 1/15/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.62E-02 2.78E-03 3.05E-03 Sample ID: 466368 Sample Dates: 1/15/2018 - 1/22/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.95E-02 3.29E-03 2.76E-03 Sample ID: 466956 Sample Dates: 1/22/2018 - 1/29/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.18E-02 2.48E-03 3.13E-03 Sample ID: 467315 Sample Dates: 1/29/2018 - 2/5/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.52E-02 2.71E-03 3.04E-03 Sample ID: 467624 Sample Dates: 2/5/2018 - 2/12/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.60E-02 2.78E-03 3.07E-03 Sample ID: 468416 Sample Dates: 2/12/2018 - 2/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.54E-02 2.81E-03 3.34E-03 Sample ID: 468737 Sample Dates: 2/19/2018 - 2/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.08E-02 2.73E-03 3.59E-03 Sample ID: 469549 Sample Dates: 2/26/2018 - 3/5/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.93E-02 3.05E-03 3.35E-03 Sample ID: 470571 Sample Dates: 3/5/2018 - 3/12/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.09E-02 3.05E-03 3.15E-03 Sample ID: 471138 Sample Dates: 3/12/2018 - 3/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.48E-02 3.14E-03 2.96E-03 Sample ID: 471693 Sample Dates: 3/19/2018 - 3/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.38E-02 2.37E-03 2.56E-03 Sample ID: 472471 Sample Dates: 3/26/2018 - 4/2/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.38E-02 2.71E-03 3.22E-03 Sample ID: 472480 Sample Dates: 1/2/2018 - 4/2/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.24E-03 0.00E+00 1.24E-03 Cs-137 <1.02E-03 0.00E+00 1.02E-03 Be-7 1.38E-01 3.74E-02 3.64E-02 K-40 1.16E-02 1.29E-02 2.00E-02 Sample ID: 472955 Sample Dates: 4/2/2018 - 4/9/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.09E-02 2.89E-03 3.12E-03 Sample ID: 473246 Sample Dates: 4/9/2018 - 4/16/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.86E-02 2.64E-03 2.84E-03 Sample ID: 473611 Sample Dates: 4/16/2018 - 4/23/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.81E-02 2.75E-03 3.00E-03 Sample ID: 474131 Sample Dates: 4/23/2018 - 4/30/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.16E-02 2.68E-03 3.44E-03 Sample ID: 474509 Sample Dates: 4/30/2018 - 5/7/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.74E-02 3.12E-03 3.67E-03 Sample ID: 474868 Sample Dates: 5/7/2018 - 5/14/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.29E-02 3.12E-03 3.14E-03 Sample ID: 475192 Sample Dates: 5/14/2018 - 5/21/2018 Nuclide Activity 2 Sigma Error MDA Beta 9.80E-03 2.50E-03 3.21E-03 Sample ID: 475517 Sample Dates: 5/21/2018 - 5/29/2018 Nuclide Activity 2 Sigma Error MDA Beta 9.81E-03 2.41E-03 3.21E-03 Sample ID: 476342 Sample Dates: 5/29/2018 - 6/4/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.46E-02 2.55E-03 2.74E-03 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 17 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 63 Sample Point 63 [ INDICATOR - SW @ 0.6 miles ]

Sample ID: 477354 Sample Dates: 6/4/2018 - 6/11/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.33E-02 3.23E-03 3.40E-03 Sample ID: 478084 Sample Dates: 6/11/2018 - 6/18/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.08E-02 3.13E-03 3.20E-03 Sample ID: 478404 Sample Dates: 6/18/2018 - 6/25/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.04E-02 3.15E-03 3.44E-03 Sample ID: 478755 Sample Dates: 6/25/2018 - 7/2/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.73E-02 2.92E-03 3.22E-03 Sample ID: 478764 Sample Dates: 4/2/2018 - 7/2/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <3.76E-04 0.00E+00 3.76E-04 Cs-137 <1.06E-03 0.00E+00 1.06E-03 Be-7 1.74E-01 4.15E-02 3.69E-02 K-40 1.54E-02 1.24E-02 1.60E-02 Sample ID: 479036 Sample Dates: 7/2/2018 - 7/9/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.23E-02 2.67E-03 3.36E-03 Sample ID: 479857 Sample Dates: 7/9/2018 - 7/16/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.44E-02 3.35E-03 3.46E-03 Sample ID: 480227 Sample Dates: 7/16/2018 - 7/23/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.76E-02 2.90E-03 3.19E-03 Sample ID: 481054 Sample Dates: 7/23/2018 - 7/30/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.11E-02 2.80E-03 2.84E-03 Sample ID: 481498 Sample Dates: 7/30/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA Beta 9.00E-03 2.15E-03 2.74E-03 Sample ID: 481931 Sample Dates: 8/6/2018 - 8/13/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.97E-02 3.01E-03 3.21E-03 Sample ID: 482463 Sample Dates: 8/13/2018 - 8/20/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.31E-02 2.80E-03 2.63E-03 Sample ID: 482788 Sample Dates: 8/20/2018 - 8/27/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.85E-02 2.65E-03 2.78E-03 Sample ID: 483413 Sample Dates: 8/27/2018 - 9/4/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.69E-02 2.60E-03 2.81E-03 Sample ID: 483988 Sample Dates: 9/4/2018 - 9/10/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.08E-02 3.60E-03 4.07E-03 Sample ID: 484158 Sample Dates: 9/10/2018 - 9/17/2018 Nuclide Activity 2 Sigma Error MDA Beta 7.65E-03 2.18E-03 2.83E-03 Sample ID: 485009 Sample Dates: 9/17/2018 - 9/24/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.20E-02 3.13E-03 3.09E-03 Sample ID: 485239 Sample Dates: 9/24/2018 - 10/1/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.58E-02 2.74E-03 3.10E-03 Sample ID: 485463 Sample Dates: 7/2/2018 - 10/1/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.00E-03 0.00E+00 1.00E-03 Cs-137 <1.20E-03 0.00E+00 1.20E-03 Be-7 1.43E-01 3.70E-02 3.48E-02 K-40 <3.81E-02 0.00E+00 3.81E-02 Sample ID: 486130 Sample Dates: 10/1/2018 - 10/8/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.65E-02 3.39E-03 3.18E-03 Sample ID: 486679 Sample Dates: 10/8/2018 - 10/15/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.65E-02 2.76E-03 3.00E-03 Sample ID: 487718 Sample Dates: 10/15/2018 - 10/22/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.34E-02 3.18E-03 3.06E-03 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 18 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 63 Sample Point 63 [ INDICATOR - SW @ 0.6 miles ]

Sample ID: 487965 Sample Dates: 10/22/2018 - 10/29/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.56E-02 2.38E-03 2.51E-03 Sample ID: 488450 Sample Dates: 10/29/2018 - 11/5/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.86E-02 2.67E-03 2.73E-03 Sample ID: 488826 Sample Dates: 11/5/2018 - 11/12/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.67E-02 2.80E-03 3.06E-03 Sample ID: 489130 Sample Dates: 11/12/2018 - 11/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.84E-02 2.72E-03 2.97E-03 Sample ID: 489715 Sample Dates: 11/19/2018 - 11/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.49E-02 3.14E-03 2.93E-03 Sample ID: 490131 Sample Dates: 11/26/2018 - 12/3/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.78E-02 2.78E-03 3.17E-03 Sample ID: 490777 Sample Dates: 12/3/2018 - 12/11/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.63E-02 2.49E-03 2.53E-03 Sample ID: 491157 Sample Dates: 12/11/2018 - 12/18/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.85E-02 2.94E-03 3.13E-03 Sample ID: 491461 Sample Dates: 12/18/2018 - 12/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.71E-02 2.33E-03 2.40E-03 Sample ID: 491717 Sample Dates: 12/26/2018 - 12/31/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.98E-02 3.61E-03 4.28E-03 Sample ID: 491726 Sample Dates: 10/1/2018 - 12/31/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.59E-03 0.00E+00 1.59E-03 Cs-137 <1.46E-03 0.00E+00 1.46E-03 Be-7 1.02E-01 3.53E-02 4.09E-02 K-40 <2.20E-02 0.00E+00 2.20E-02 Sample Point 90 [ INDICATOR - SSW @ 0.5 miles ]

Sample ID: 465971 Sample Dates: 1/2/2018 - 1/8/2018 Nuclide Activity 2 Sigma Error MDA Beta 3.04E-02 3.81E-03 3.65E-03 Sample ID: 466171 Sample Dates: 1/8/2018 - 1/15/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.95E-02 2.95E-03 3.05E-03 Sample ID: 466369 Sample Dates: 1/15/2018 - 1/22/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.24E-02 2.97E-03 2.76E-03 Sample ID: 466957 Sample Dates: 1/22/2018 - 1/29/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.11E-02 2.44E-03 3.13E-03 Sample ID: 467316 Sample Dates: 1/29/2018 - 2/5/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.14E-02 2.49E-03 3.04E-03 Sample ID: 467625 Sample Dates: 2/5/2018 - 2/12/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.70E-02 2.83E-03 3.06E-03 Sample ID: 468417 Sample Dates: 2/12/2018 - 2/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.41E-02 2.75E-03 3.34E-03 Sample ID: 468738 Sample Dates: 2/19/2018 - 2/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.05E-02 2.70E-03 3.59E-03 Sample ID: 469550 Sample Dates: 2/26/2018 - 3/5/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.98E-02 3.07E-03 3.35E-03 Sample ID: 470572 Sample Dates: 3/5/2018 - 3/12/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.36E-02 3.18E-03 3.15E-03 Sample ID: 471139 Sample Dates: 3/12/2018 - 3/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.49E-02 3.14E-03 2.96E-03 Sample ID: 471694 Sample Dates: 3/19/2018 - 3/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.48E-02 2.42E-03 2.56E-03 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 19 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 90 Sample Point 90 [ INDICATOR - SSW @ 0.5 miles ]

Sample ID: 472472 Sample Dates: 3/26/2018 - 4/2/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.23E-02 2.62E-03 3.22E-03 Sample ID: 472481 Sample Dates: 1/2/2018 - 4/2/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.67E-03 0.00E+00 1.67E-03 Cs-137 <1.05E-03 0.00E+00 1.05E-03 Be-7 1.76E-01 4.05E-02 3.11E-02 K-40 <3.77E-02 0.00E+00 3.77E-02 Sample ID: 472956 Sample Dates: 4/2/2018 - 4/9/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.08E-02 2.88E-03 3.12E-03 Sample ID: 473247 Sample Dates: 4/9/2018 - 4/16/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.12E-02 2.76E-03 2.84E-03 Sample ID: 473612 Sample Dates: 4/16/2018 - 4/23/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.11E-02 2.89E-03 3.00E-03 Sample ID: 474132 Sample Dates: 4/23/2018 - 4/30/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.25E-02 2.72E-03 3.44E-03 Sample ID: 474510 Sample Dates: 4/30/2018 - 5/7/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.19E-02 3.33E-03 3.67E-03 Sample ID: 474869 Sample Dates: 5/7/2018 - 5/14/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.43E-02 3.19E-03 3.14E-03 Sample ID: 475193 Sample Dates: 5/14/2018 - 5/21/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.08E-02 2.56E-03 3.21E-03 Sample ID: 475518 Sample Dates: 5/21/2018 - 5/29/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.29E-02 2.56E-03 3.21E-03 Sample ID: 476343 Sample Dates: 5/29/2018 - 6/4/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.66E-02 2.67E-03 2.74E-03 Sample ID: 477355 Sample Dates: 6/4/2018 - 6/11/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.75E-02 3.41E-03 3.40E-03 Sample ID: 478085 Sample Dates: 6/11/2018 - 6/18/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.16E-02 3.17E-03 3.20E-03 Sample ID: 478405 Sample Dates: 6/18/2018 - 6/25/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.35E-02 3.29E-03 3.44E-03 Sample ID: 478756 Sample Dates: 6/25/2018 - 7/2/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.63E-02 2.85E-03 3.22E-03 Sample ID: 478765 Sample Dates: 4/2/2018 - 7/2/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.59E-03 0.00E+00 1.59E-03 Cs-137 <1.71E-03 0.00E+00 1.71E-03 Be-7 2.08E-01 4.23E-02 1.90E-02 K-40 <3.04E-02 0.00E+00 3.04E-02 Sample ID: 479037 Sample Dates: 7/2/2018 - 7/9/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.57E-02 2.86E-03 3.36E-03 Sample ID: 479858 Sample Dates: 7/9/2018 - 7/16/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.79E-02 3.50E-03 3.46E-03 Sample ID: 480228 Sample Dates: 7/16/2018 - 7/23/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.02E-02 3.02E-03 3.19E-03 Sample ID: 481055 Sample Dates: 7/23/2018 - 7/30/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.85E-02 2.68E-03 2.84E-03 Sample ID: 481499 Sample Dates: 7/30/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.08E-02 2.25E-03 2.74E-03 Sample ID: 481932 Sample Dates: 8/6/2018 - 8/13/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.13E-02 3.08E-03 3.21E-03 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 20 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 90 Sample Point 90 [ INDICATOR - SSW @ 0.5 miles ]

Sample ID: 482464 Sample Dates: 8/13/2018 - 8/20/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.09E-02 2.70E-03 2.63E-03 Sample ID: 482789 Sample Dates: 8/20/2018 - 8/27/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.73E-02 2.60E-03 2.78E-03 Sample ID: 483414 Sample Dates: 8/27/2018 - 9/4/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.62E-02 2.57E-03 2.81E-03 Sample ID: 483989 Sample Dates: 9/4/2018 - 9/10/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.94E-02 3.53E-03 4.07E-03 Sample ID: 484159 Sample Dates: 9/10/2018 - 9/17/2018 Nuclide Activity 2 Sigma Error MDA Beta 8.02E-03 2.20E-03 2.83E-03 Sample ID: 485010 Sample Dates: 9/17/2018 - 9/24/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.43E-02 3.24E-03 3.09E-03 Sample ID: 485240 Sample Dates: 9/24/2018 - 10/1/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.71E-02 2.80E-03 3.10E-03 Sample ID: 485464 Sample Dates: 7/2/2018 - 10/1/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <2.41E-03 0.00E+00 2.41E-03 Cs-137 <1.01E-03 0.00E+00 1.01E-03 Be-7 1.38E-01 3.33E-02 2.37E-02 K-40 <3.00E-02 0.00E+00 3.00E-02 Sample ID: 486131 Sample Dates: 10/1/2018 - 10/8/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.92E-02 3.51E-03 3.18E-03 Sample ID: 486680 Sample Dates: 10/8/2018 - 10/15/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.77E-02 2.82E-03 3.00E-03 Sample ID: 487719 Sample Dates: 10/15/2018 - 10/22/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.37E-02 3.20E-03 3.06E-03 Sample ID: 487966 Sample Dates: 10/22/2018 - 10/29/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.66E-02 2.43E-03 2.51E-03 Sample ID: 488451 Sample Dates: 10/29/2018 - 11/5/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.71E-02 2.60E-03 2.73E-03 Sample ID: 488827 Sample Dates: 11/5/2018 - 11/12/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.95E-02 2.94E-03 3.06E-03 Sample ID: 489131 Sample Dates: 11/12/2018 - 11/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.56E-02 2.58E-03 2.97E-03 Sample ID: 489716 Sample Dates: 11/19/2018 - 11/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.56E-02 3.17E-03 2.93E-03 Sample ID: 490132 Sample Dates: 11/26/2018 - 12/3/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.12E-02 2.93E-03 3.17E-03 Sample ID: 490778 Sample Dates: 12/3/2018 - 12/11/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.91E-02 2.63E-03 2.53E-03 Sample ID: 491158 Sample Dates: 12/11/2018 - 12/18/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.78E-02 2.90E-03 3.13E-03 Sample ID: 491462 Sample Dates: 12/18/2018 - 12/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.66E-02 2.30E-03 2.40E-03 Sample ID: 491718 Sample Dates: 12/26/2018 - 12/31/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.30E-02 3.77E-03 4.28E-03 Sample ID: 491727 Sample Dates: 10/1/2018 - 12/31/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.65E-03 0.00E+00 1.65E-03 Cs-137 <1.35E-03 0.00E+00 1.35E-03 Be-7 8.64E-02 3.54E-02 4.67E-02 K-40 <2.98E-02 0.00E+00 2.98E-02 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 21 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 91 Sample Point 91 [ INDICATOR - ENE @ 1.6 miles ]

Sample ID: 465972 Sample Dates: 1/2/2018 - 1/8/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.41E-02 3.55E-03 3.70E-03 Sample ID: 466172 Sample Dates: 1/8/2018 - 1/15/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.58E-02 2.75E-03 3.04E-03 Sample ID: 466370 Sample Dates: 1/15/2018 - 1/22/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.82E-02 3.22E-03 2.72E-03 Sample ID: 466958 Sample Dates: 1/22/2018 - 1/29/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.27E-02 2.54E-03 3.15E-03 Sample ID: 467317 Sample Dates: 1/29/2018 - 2/5/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.27E-02 2.58E-03 3.07E-03 Sample ID: 467626 Sample Dates: 2/5/2018 - 2/12/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.55E-02 2.74E-03 3.05E-03 Sample ID: 468418 Sample Dates: 2/12/2018 - 2/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.48E-02 2.76E-03 3.31E-03 Sample ID: 468739 Sample Dates: 2/19/2018 - 2/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.20E-02 2.82E-03 3.63E-03 Sample ID: 469551 Sample Dates: 2/26/2018 - 3/5/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.72E-02 2.91E-03 3.30E-03 Sample ID: 470573 Sample Dates: 3/5/2018 - 3/12/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.18E-02 3.13E-03 3.21E-03 Sample ID: 471140 Sample Dates: 3/12/2018 - 3/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.47E-02 3.12E-03 2.93E-03 Sample ID: 471695 Sample Dates: 3/19/2018 - 3/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.47E-02 2.43E-03 2.58E-03 Sample ID: 472473 Sample Dates: 3/26/2018 - 4/2/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.24E-02 2.64E-03 3.24E-03 Sample ID: 472482 Sample Dates: 1/2/2018 - 4/2/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.41E-03 0.00E+00 1.41E-03 Cs-137 <1.40E-03 0.00E+00 1.40E-03 Be-7 1.62E-01 3.58E-02 1.70E-02 K-40 <2.94E-02 0.00E+00 2.94E-02 Sample ID: 472957 Sample Dates: 4/2/2018 - 4/9/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.86E-02 2.78E-03 3.11E-03 Sample ID: 473248 Sample Dates: 4/9/2018 - 4/16/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.09E-02 2.73E-03 2.81E-03 Sample ID: 473613 Sample Dates: 4/16/2018 - 4/23/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.97E-02 2.81E-03 2.99E-03 Sample ID: 474133 Sample Dates: 4/23/2018 - 4/30/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.15E-02 2.71E-03 3.52E-03 Sample ID: 474511 Sample Dates: 4/30/2018 - 5/7/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.42E-02 3.39E-03 3.59E-03 Sample ID: 474870 Sample Dates: 5/7/2018 - 5/14/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.64E-02 3.30E-03 3.15E-03 Sample ID: 475194 Sample Dates: 5/14/2018 - 5/21/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.08E-02 2.57E-03 3.23E-03 Sample ID: 475519 Sample Dates: 5/21/2018 - 5/29/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.31E-02 2.59E-03 3.23E-03 Sample ID: 476344 Sample Dates: 5/29/2018 - 6/4/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.69E-02 2.65E-03 2.69E-03 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 22 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 91 Sample Point 91 [ INDICATOR - ENE @ 1.6 miles ]

Sample ID: 477356 Sample Dates: 6/4/2018 - 6/11/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.49E-02 3.30E-03 3.41E-03 Sample ID: 478086 Sample Dates: 6/11/2018 - 6/18/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.32E-02 3.26E-03 3.23E-03 Sample ID: 478406 Sample Dates: 6/18/2018 - 6/25/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.52E-02 3.38E-03 3.45E-03 Sample ID: 478757 Sample Dates: 6/25/2018 - 7/2/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.00E-02 3.00E-03 3.14E-03 Sample ID: 478766 Sample Dates: 4/2/2018 - 7/2/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <2.09E-03 0.00E+00 2.09E-03 Cs-137 <1.16E-03 0.00E+00 1.16E-03 Be-7 1.64E-01 3.77E-02 3.00E-02 K-40 2.25E-02 1.33E-02 1.29E-02 Sample ID: 479038 Sample Dates: 7/2/2018 - 7/9/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.63E-02 2.93E-03 3.43E-03 Sample ID: 479859 Sample Dates: 7/9/2018 - 7/16/2018 Nuclide Activity 2 Sigma Error MDA Beta 3.06E-02 3.61E-03 3.46E-03 Sample ID: 480229 Sample Dates: 7/16/2018 - 7/23/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.21E-02 3.12E-03 3.19E-03 Sample ID: 481056 Sample Dates: 7/23/2018 - 7/30/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.02E-02 2.75E-03 2.83E-03 Sample ID: 481500 Sample Dates: 7/30/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA Beta 8.69E-03 2.07E-03 2.64E-03 Sample ID: 481933 Sample Dates: 8/6/2018 - 8/13/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.95E-02 3.07E-03 3.34E-03 Sample ID: 482465 Sample Dates: 8/13/2018 - 8/20/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.02E-02 2.67E-03 2.65E-03 Sample ID: 482790 Sample Dates: 8/20/2018 - 8/27/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.00E-02 2.72E-03 2.78E-03 Sample ID: 483415 Sample Dates: 8/27/2018 - 9/4/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.55E-02 2.54E-03 2.81E-03 Sample ID: 483990 Sample Dates: 9/4/2018 - 9/10/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.97E-02 3.49E-03 3.98E-03 Sample ID: 484160 Sample Dates: 9/10/2018 - 9/17/2018 Nuclide Activity 2 Sigma Error MDA Beta 7.83E-03 2.22E-03 2.89E-03 Sample ID: 485011 Sample Dates: 9/17/2018 - 9/24/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.28E-02 3.15E-03 3.05E-03 Sample ID: 485241 Sample Dates: 9/24/2018 - 10/1/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.61E-02 2.76E-03 3.11E-03 Sample ID: 485465 Sample Dates: 7/2/2018 - 10/1/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.99E-03 0.00E+00 1.99E-03 Cs-137 <1.39E-03 0.00E+00 1.39E-03 Be-7 1.46E-01 3.89E-02 3.85E-02 K-40 <3.02E-02 0.00E+00 3.02E-02 Sample ID: 486132 Sample Dates: 10/1/2018 - 10/8/2018 Nuclide Activity 2 Sigma Error MDA Beta 3.01E-02 3.54E-03 3.17E-03 Sample ID: 486681 Sample Dates: 10/8/2018 - 10/15/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.78E-02 2.85E-03 3.05E-03 Sample ID: 487720 Sample Dates: 10/15/2018 - 10/22/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.45E-02 3.23E-03 3.04E-03 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 23 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 91 Sample Point 91 [ INDICATOR - ENE @ 1.6 miles ]

Sample ID: 487967 Sample Dates: 10/22/2018 - 10/29/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.67E-02 2.43E-03 2.50E-03 Sample ID: 488452 Sample Dates: 10/29/2018 - 11/5/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.96E-02 2.74E-03 2.75E-03 Sample ID: 488828 Sample Dates: 11/5/2018 - 11/12/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.91E-02 2.93E-03 3.07E-03 Sample ID: 489132 Sample Dates: 11/12/2018 - 11/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.93E-02 2.76E-03 2.97E-03 Sample ID: 489717 Sample Dates: 11/19/2018 - 11/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.74E-02 3.23E-03 2.91E-03 Sample ID: 490133 Sample Dates: 11/26/2018 - 12/3/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.06E-02 2.94E-03 3.21E-03 Sample ID: 490779 Sample Dates: 12/3/2018 - 12/11/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.88E-02 2.62E-03 2.53E-03 Sample ID: 491159 Sample Dates: 12/11/2018 - 12/18/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.03E-02 3.01E-03 3.12E-03 Sample ID: 491463 Sample Dates: 12/18/2018 - 12/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.66E-02 2.29E-03 2.38E-03 Sample ID: 491719 Sample Dates: 12/26/2018 - 12/31/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.31E-02 3.80E-03 4.34E-03 Sample ID: 491728 Sample Dates: 10/1/2018 - 12/31/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.89E-03 0.00E+00 1.89E-03 Cs-137 <1.73E-03 0.00E+00 1.73E-03 Be-7 1.29E-01 3.34E-02 2.86E-02 K-40 <3.25E-02 0.00E+00 3.25E-02 Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 1 Sample Point 1 [ INDICATOR - N @ 2.6 miles ]

Sample ID: 465973 Sample Dates: 1/2/2018 - 1/8/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.38E-02 0.00E+00 2.38E-02 Cs-134 <1.84E-02 0.00E+00 1.84E-02 Cs-137 <2.26E-02 0.00E+00 2.26E-02 Be-7 <1.34E-01 0.00E+00 1.34E-01 K-40 5.26E-01 2.26E-01 2.62E-01 Sample ID: 466173 Sample Dates: 1/8/2018 - 1/15/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.55E-02 0.00E+00 2.55E-02 Cs-134 <1.69E-02 0.00E+00 1.69E-02 Cs-137 <1.72E-02 0.00E+00 1.72E-02 Be-7 <1.27E-01 0.00E+00 1.27E-01 K-40 5.25E-01 2.00E-01 2.08E-01 Sample ID: 466371 Sample Dates: 1/15/2018 - 1/22/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.44E-02 0.00E+00 2.44E-02 Cs-134 <1.93E-02 0.00E+00 1.93E-02 Cs-137 <1.87E-02 0.00E+00 1.87E-02 Be-7 <9.96E-02 0.00E+00 9.96E-02 K-40 <3.53E-01 0.00E+00 3.53E-01 Sample ID: 466959 Sample Dates: 1/22/2018 - 1/29/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.78E-02 0.00E+00 1.78E-02 Cs-134 <1.39E-02 0.00E+00 1.39E-02 Cs-137 <1.84E-02 0.00E+00 1.84E-02 Be-7 <1.17E-01 0.00E+00 1.17E-01 K-40 5.54E-01 1.99E-01 1.88E-01 Sample ID: 467318 Sample Dates: 1/29/2018 - 2/5/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.39E-02 0.00E+00 2.39E-02 Cs-134 <1.50E-02 0.00E+00 1.50E-02 Cs-137 <1.62E-02 0.00E+00 1.62E-02 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 24 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 1 Sample Point 1 [ INDICATOR - N @ 2.6 miles ]

Sample ID: 467318 Sample Dates: 1/29/2018 - 2/5/2018 Nuclide Activity 2 Sigma Error MDA Be-7 <1.12E-01 0.00E+00 1.12E-01 K-40 4.36E-01 1.73E-01 1.69E-01 Sample ID: 467627 Sample Dates: 2/5/2018 - 2/12/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.09E-02 0.00E+00 2.09E-02 Cs-134 <1.53E-02 0.00E+00 1.53E-02 Cs-137 <1.80E-02 0.00E+00 1.80E-02 Be-7 <1.03E-01 0.00E+00 1.03E-01 K-40 4.39E-01 1.79E-01 1.83E-01 Sample ID: 468419 Sample Dates: 2/12/2018 - 2/19/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.66E-02 0.00E+00 2.66E-02 Cs-134 <1.22E-02 0.00E+00 1.22E-02 Cs-137 <1.59E-02 0.00E+00 1.59E-02 Be-7 <1.04E-01 0.00E+00 1.04E-01 K-40 4.66E-01 1.75E-01 1.63E-01 Sample ID: 468740 Sample Dates: 2/19/2018 - 2/26/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.10E-02 0.00E+00 2.10E-02 Cs-134 <1.87E-02 0.00E+00 1.87E-02 Cs-137 <1.94E-02 0.00E+00 1.94E-02 Be-7 <1.22E-01 0.00E+00 1.22E-01 K-40 4.62E-01 1.76E-01 1.54E-01 Sample ID: 469552 Sample Dates: 2/26/2018 - 3/5/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.65E-02 0.00E+00 2.65E-02 Cs-134 <1.29E-02 0.00E+00 1.29E-02 Cs-137 <1.78E-02 0.00E+00 1.78E-02 Be-7 <1.37E-01 0.00E+00 1.37E-01 K-40 7.29E-01 2.18E-01 1.62E-01 Sample ID: 470574 Sample Dates: 3/5/2018 - 3/12/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.13E-02 0.00E+00 2.13E-02 Cs-134 <1.66E-02 0.00E+00 1.66E-02 Cs-137 <1.83E-02 0.00E+00 1.83E-02 Be-7 <1.15E-01 0.00E+00 1.15E-01 K-40 5.41E-01 1.90E-01 1.67E-01 Sample ID: 471141 Sample Dates: 3/12/2018 - 3/19/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.25E-02 0.00E+00 2.25E-02 Cs-134 <1.89E-02 0.00E+00 1.89E-02 Cs-137 <1.88E-02 0.00E+00 1.88E-02 Be-7 <1.08E-01 0.00E+00 1.08E-01 K-40 3.94E-01 1.76E-01 2.01E-01 Sample ID: 471696 Sample Dates: 3/19/2018 - 3/26/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.36E-02 0.00E+00 2.36E-02 Cs-134 <2.15E-02 0.00E+00 2.15E-02 Cs-137 <1.97E-02 0.00E+00 1.97E-02 Be-7 <1.10E-01 0.00E+00 1.10E-01 K-40 5.02E-01 2.02E-01 2.23E-01 Sample ID: 472483 Sample Dates: 3/26/2018 - 4/2/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.18E-02 0.00E+00 2.18E-02 Cs-134 <1.42E-02 0.00E+00 1.42E-02 Cs-137 <1.81E-02 0.00E+00 1.81E-02 Be-7 <1.17E-01 0.00E+00 1.17E-01 K-40 5.40E-01 1.85E-01 1.53E-01 Sample ID: 472958 Sample Dates: 4/2/2018 - 4/9/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.39E-02 0.00E+00 2.39E-02 Cs-134 <1.75E-02 0.00E+00 1.75E-02 Cs-137 <1.66E-02 0.00E+00 1.66E-02 Be-7 <1.25E-01 0.00E+00 1.25E-01 K-40 4.52E-01 2.21E-01 2.92E-01 Sample ID: 473249 Sample Dates: 4/9/2018 - 4/16/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.06E-02 0.00E+00 2.06E-02 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 25 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 1 Sample Point 1 [ INDICATOR - N @ 2.6 miles ]

Sample ID: 473249 Sample Dates: 4/9/2018 - 4/16/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.70E-02 0.00E+00 1.70E-02 Cs-137 <1.51E-02 0.00E+00 1.51E-02 Be-7 <1.44E-01 0.00E+00 1.44E-01 K-40 4.90E-01 1.73E-01 1.36E-01 Sample ID: 473614 Sample Dates: 4/16/2018 - 4/23/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.48E-02 0.00E+00 2.48E-02 Cs-134 <2.15E-02 0.00E+00 2.15E-02 Cs-137 <1.63E-02 0.00E+00 1.63E-02 Be-7 <1.05E-01 0.00E+00 1.05E-01 K-40 2.27E-01 1.62E-01 2.30E-01 Sample ID: 474134 Sample Dates: 4/23/2018 - 4/30/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.37E-02 0.00E+00 2.37E-02 Cs-134 <1.71E-02 0.00E+00 1.71E-02 Cs-137 <1.76E-02 0.00E+00 1.76E-02 Be-7 <1.29E-01 0.00E+00 1.29E-01 K-40 5.68E-01 1.96E-01 1.79E-01 Sample ID: 474512 Sample Dates: 4/30/2018 - 5/7/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.23E-02 0.00E+00 2.23E-02 Cs-134 <1.54E-02 0.00E+00 1.54E-02 Cs-137 <1.72E-02 0.00E+00 1.72E-02 Be-7 <1.20E-01 0.00E+00 1.20E-01 K-40 6.24E-01 1.87E-01 3.52E-02 Sample ID: 474871 Sample Dates: 5/7/2018 - 5/14/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.30E-02 0.00E+00 2.30E-02 Cs-134 <1.48E-02 0.00E+00 1.48E-02 Cs-137 <1.74E-02 0.00E+00 1.74E-02 Be-7 <1.16E-01 0.00E+00 1.16E-01 K-40 4.34E-01 1.79E-01 1.92E-01 Sample ID: 475195 Sample Dates: 5/14/2018 - 5/21/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.12E-02 0.00E+00 2.12E-02 Cs-134 <1.71E-02 0.00E+00 1.71E-02 Cs-137 <1.93E-02 0.00E+00 1.93E-02 Be-7 <1.26E-01 0.00E+00 1.26E-01 K-40 5.13E-01 2.14E-01 2.51E-01 Sample ID: 475520 Sample Dates: 5/21/2018 - 5/29/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.06E-02 0.00E+00 2.06E-02 Cs-134 <1.67E-02 0.00E+00 1.67E-02 Cs-137 <1.62E-02 0.00E+00 1.62E-02 Be-7 <1.08E-01 0.00E+00 1.08E-01 K-40 4.99E-01 1.54E-01 3.01E-02 Sample ID: 476345 Sample Dates: 5/29/2018 - 6/4/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.96E-02 0.00E+00 2.96E-02 Cs-134 <2.10E-02 0.00E+00 2.10E-02 Cs-137 <1.51E-02 0.00E+00 1.51E-02 Be-7 <1.61E-01 0.00E+00 1.61E-01 K-40 5.38E-01 2.36E-01 2.82E-01 Sample ID: 477357 Sample Dates: 6/4/2018 - 6/11/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.97E-02 0.00E+00 1.97E-02 Cs-134 <1.95E-02 0.00E+00 1.95E-02 Cs-137 <1.46E-02 0.00E+00 1.46E-02 Be-7 <1.27E-01 0.00E+00 1.27E-01 K-40 4.16E-01 1.94E-01 2.38E-01 Sample ID: 478087 Sample Dates: 6/11/2018 - 6/18/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.53E-02 0.00E+00 2.53E-02 Cs-134 <1.79E-02 0.00E+00 1.79E-02 Cs-137 <1.98E-02 0.00E+00 1.98E-02 Be-7 <1.30E-01 0.00E+00 1.30E-01 K-40 5.14E-01 2.15E-01 2.53E-01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 26 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 1 Sample Point 1 [ INDICATOR - N @ 2.6 miles ]

Sample ID: 478407 Sample Dates: 6/18/2018 - 6/25/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.24E-02 0.00E+00 2.24E-02 Cs-134 <1.24E-02 0.00E+00 1.24E-02 Cs-137 <1.72E-02 0.00E+00 1.72E-02 Be-7 <1.22E-01 0.00E+00 1.22E-01 K-40 5.32E-01 2.20E-01 2.64E-01 Sample ID: 478767 Sample Dates: 6/25/2018 - 7/2/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.27E-02 0.00E+00 2.27E-02 Cs-134 <1.53E-02 0.00E+00 1.53E-02 Cs-137 <1.60E-02 0.00E+00 1.60E-02 Be-7 <1.21E-01 0.00E+00 1.21E-01 K-40 4.26E-01 1.98E-01 2.44E-01 Sample ID: 479039 Sample Dates: 7/2/2018 - 7/9/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.73E-02 0.00E+00 1.73E-02 Cs-134 <1.76E-02 0.00E+00 1.76E-02 Cs-137 <1.60E-02 0.00E+00 1.60E-02 Be-7 <1.05E-01 0.00E+00 1.05E-01 K-40 5.67E-01 2.27E-01 2.74E-01 Sample ID: 479860 Sample Dates: 7/9/2018 - 7/16/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.92E-02 0.00E+00 1.92E-02 Cs-134 <2.10E-02 0.00E+00 2.10E-02 Cs-137 <1.84E-02 0.00E+00 1.84E-02 Be-7 <1.26E-01 0.00E+00 1.26E-01 K-40 <4.20E-01 0.00E+00 4.20E-01 Sample ID: 480230 Sample Dates: 7/16/2018 - 7/23/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.12E-02 0.00E+00 2.12E-02 Cs-134 <1.91E-02 0.00E+00 1.91E-02 Cs-137 <1.52E-02 0.00E+00 1.52E-02 Be-7 <1.20E-01 0.00E+00 1.20E-01 K-40 5.84E-01 2.00E-01 1.85E-01 Sample ID: 481057 Sample Dates: 7/23/2018 - 7/30/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.46E-02 0.00E+00 2.46E-02 Cs-134 <2.07E-02 0.00E+00 2.07E-02 Cs-137 <1.44E-02 0.00E+00 1.44E-02 Be-7 <1.19E-01 0.00E+00 1.19E-01 K-40 4.59E-01 1.80E-01 1.74E-01 Sample ID: 481501 Sample Dates: 7/30/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.39E-02 0.00E+00 2.39E-02 Cs-134 <1.22E-02 0.00E+00 1.22E-02 Cs-137 <1.65E-02 0.00E+00 1.65E-02 Be-7 <1.15E-01 0.00E+00 1.15E-01 K-40 4.53E-01 1.78E-01 1.80E-01 Sample ID: 481934 Sample Dates: 8/6/2018 - 8/13/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.94E-02 0.00E+00 1.94E-02 Cs-134 <1.85E-02 0.00E+00 1.85E-02 Cs-137 <1.58E-02 0.00E+00 1.58E-02 Be-7 <1.04E-01 0.00E+00 1.04E-01 K-40 5.52E-01 2.00E-01 1.92E-01 Sample ID: 482466 Sample Dates: 8/13/2018 - 8/20/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.64E-02 0.00E+00 1.64E-02 Cs-134 <1.61E-02 0.00E+00 1.61E-02 Cs-137 <1.52E-02 0.00E+00 1.52E-02 Be-7 <1.15E-01 0.00E+00 1.15E-01 K-40 2.92E-01 1.39E-01 1.33E-01 Sample ID: 482791 Sample Dates: 8/20/2018 - 8/27/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.43E-02 0.00E+00 1.43E-02 Cs-134 <1.41E-02 0.00E+00 1.41E-02 Cs-137 <1.63E-02 0.00E+00 1.63E-02 Be-7 <7.62E-02 0.00E+00 7.62E-02 K-40 1.39E-01 1.23E-01 1.83E-01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 27 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 1 Sample Point 1 [ INDICATOR - N @ 2.6 miles ]

Sample ID: 483416 Sample Dates: 8/27/2018 - 9/4/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.79E-02 0.00E+00 1.79E-02 Cs-134 <1.74E-02 0.00E+00 1.74E-02 Cs-137 <1.64E-02 0.00E+00 1.64E-02 Be-7 <9.63E-02 0.00E+00 9.63E-02 K-40 5.51E-01 1.84E-01 1.76E-01 Sample ID: 483991 Sample Dates: 9/4/2018 - 9/10/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.02E-02 0.00E+00 2.02E-02 Cs-134 <1.92E-02 0.00E+00 1.92E-02 Cs-137 <2.21E-02 0.00E+00 2.21E-02 Be-7 <1.33E-01 0.00E+00 1.33E-01 K-40 7.99E-01 2.47E-01 1.84E-01 Sample ID: 484161 Sample Dates: 9/10/2018 - 9/17/2018 Nuclide Activity 2 Sigma Error MDA I-131 <3.41E-02 0.00E+00 3.41E-02 Cs-134 <1.44E-02 0.00E+00 1.44E-02 Cs-137 <1.79E-02 0.00E+00 1.79E-02 Be-7 <1.17E-01 0.00E+00 1.17E-01 K-40 3.55E-01 1.58E-01 1.61E-01 Sample ID: 485012 Sample Dates: 9/17/2018 - 9/24/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.54E-02 0.00E+00 2.54E-02 Cs-134 <1.54E-02 0.00E+00 1.54E-02 Cs-137 <1.99E-02 0.00E+00 1.99E-02 Be-7 <1.24E-01 0.00E+00 1.24E-01 K-40 4.60E-01 1.80E-01 1.75E-01 Sample ID: 485242 Sample Dates: 9/24/2018 - 10/1/2018 Nuclide Activity 2 Sigma Error MDA I-131 <3.04E-02 0.00E+00 3.04E-02 Cs-134 <1.81E-02 0.00E+00 1.81E-02 Cs-137 <1.19E-02 0.00E+00 1.19E-02 Be-7 <1.34E-01 0.00E+00 1.34E-01 K-40 5.39E-01 1.77E-01 1.18E-01 Sample ID: 486136 Sample Dates: 10/1/2018 - 10/8/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.35E-02 0.00E+00 2.35E-02 Cs-134 <1.93E-02 0.00E+00 1.93E-02 Cs-137 <1.59E-02 0.00E+00 1.59E-02 Be-7 <1.34E-01 0.00E+00 1.34E-01 K-40 5.95E-01 1.98E-01 1.56E-01 Sample ID: 486682 Sample Dates: 10/8/2018 - 10/15/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.66E-02 0.00E+00 2.66E-02 Cs-134 <2.51E-02 0.00E+00 2.51E-02 Cs-137 <2.02E-02 0.00E+00 2.02E-02 Be-7 <1.37E-01 0.00E+00 1.37E-01 K-40 5.69E-01 2.31E-01 2.54E-01 Sample ID: 487721 Sample Dates: 10/15/2018 - 10/22/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.30E-02 0.00E+00 2.30E-02 Cs-134 <1.36E-02 0.00E+00 1.36E-02 Cs-137 <1.55E-02 0.00E+00 1.55E-02 Be-7 <1.17E-01 0.00E+00 1.17E-01 K-40 6.73E-01 1.94E-01 3.51E-02 Sample ID: 487968 Sample Dates: 10/22/2018 - 10/29/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.28E-02 0.00E+00 2.28E-02 Cs-134 <1.55E-02 0.00E+00 1.55E-02 Cs-137 <1.32E-02 0.00E+00 1.32E-02 Be-7 <1.18E-01 0.00E+00 1.18E-01 K-40 5.93E-01 1.92E-01 1.49E-01 Sample ID: 488453 Sample Dates: 10/29/2018 - 11/5/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.06E-02 0.00E+00 2.06E-02 Cs-134 <1.99E-02 0.00E+00 1.99E-02 Cs-137 <1.80E-02 0.00E+00 1.80E-02 Be-7 <1.36E-01 0.00E+00 1.36E-01 K-40 4.34E-01 1.84E-01 1.98E-01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 28 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 1 Sample Point 1 [ INDICATOR - N @ 2.6 miles ]

Sample ID: 488829 Sample Dates: 11/5/2018 - 11/12/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.12E-02 0.00E+00 2.12E-02 Cs-134 <1.51E-02 0.00E+00 1.51E-02 Cs-137 <1.68E-02 0.00E+00 1.68E-02 Be-7 <1.37E-01 0.00E+00 1.37E-01 K-40 3.62E-01 1.72E-01 2.01E-01 Sample ID: 489133 Sample Dates: 11/12/2018 - 11/19/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.66E-02 0.00E+00 1.66E-02 Cs-134 <1.53E-02 0.00E+00 1.53E-02 Cs-137 <1.89E-02 0.00E+00 1.89E-02 Be-7 <1.05E-01 0.00E+00 1.05E-01 K-40 4.87E-01 1.89E-01 1.93E-01 Sample ID: 489718 Sample Dates: 11/19/2018 - 11/26/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.01E-02 0.00E+00 2.01E-02 Cs-134 <1.48E-02 0.00E+00 1.48E-02 Cs-137 <1.65E-02 0.00E+00 1.65E-02 Be-7 <1.19E-01 0.00E+00 1.19E-01 K-40 4.88E-01 1.83E-01 1.77E-01 Sample ID: 490134 Sample Dates: 11/26/2018 - 12/3/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.17E-02 0.00E+00 2.17E-02 Cs-134 <1.83E-02 0.00E+00 1.83E-02 Cs-137 <1.82E-02 0.00E+00 1.82E-02 Be-7 <1.28E-01 0.00E+00 1.28E-01 K-40 5.13E-01 2.00E-01 2.14E-01 Sample ID: 490780 Sample Dates: 12/3/2018 - 12/11/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.88E-02 0.00E+00 1.88E-02 Cs-134 <1.33E-02 0.00E+00 1.33E-02 Cs-137 <1.60E-02 0.00E+00 1.60E-02 Be-7 <1.19E-01 0.00E+00 1.19E-01 K-40 4.79E-01 1.63E-01 1.30E-01 Sample ID: 491160 Sample Dates: 12/11/2018 - 12/18/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.69E-02 0.00E+00 1.69E-02 Cs-134 <1.80E-02 0.00E+00 1.80E-02 Cs-137 <1.90E-02 0.00E+00 1.90E-02 Be-7 <1.13E-01 0.00E+00 1.13E-01 K-40 2.66E-01 1.69E-01 2.31E-01 Sample ID: 491464 Sample Dates: 12/18/2018 - 12/26/2018 Nuclide Activity 2 Sigma Error MDA I-131 <3.43E-02 0.00E+00 3.43E-02 Cs-134 <1.15E-02 0.00E+00 1.15E-02 Cs-137 <1.60E-02 0.00E+00 1.60E-02 Be-7 <9.69E-02 0.00E+00 9.69E-02 K-40 <2.78E-01 0.00E+00 2.78E-01 Sample ID: 491729 Sample Dates: 12/26/2018 - 12/31/2018 Nuclide Activity 2 Sigma Error MDA I-131 <4.80E-02 0.00E+00 4.80E-02 Cs-134 <2.25E-02 0.00E+00 2.25E-02 Cs-137 <2.35E-02 0.00E+00 2.35E-02 Be-7 <2.24E-01 0.00E+00 2.24E-01 K-40 1.08E+00 2.99E-01 5.14E-02 Sample Point 2 [ INDICATOR - NNE @ 1.4 miles ]

Sample ID: 465974 Sample Dates: 1/2/2018 - 1/8/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.44E-02 0.00E+00 2.44E-02 Cs-134 <1.84E-02 0.00E+00 1.84E-02 Cs-137 <2.11E-02 0.00E+00 2.11E-02 Be-7 <1.34E-01 0.00E+00 1.34E-01 K-40 5.32E-01 2.33E-01 2.80E-01 Sample ID: 466174 Sample Dates: 1/8/2018 - 1/15/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.53E-02 0.00E+00 2.53E-02 Cs-134 <1.37E-02 0.00E+00 1.37E-02 Cs-137 <2.07E-02 0.00E+00 2.07E-02 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 29 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 2 Sample Point 2 [ INDICATOR - NNE @ 1.4 miles ]

Sample ID: 466174 Sample Dates: 1/8/2018 - 1/15/2018 Nuclide Activity 2 Sigma Error MDA Be-7 <1.15E-01 0.00E+00 1.15E-01 K-40 4.62E-01 2.09E-01 2.59E-01 Sample ID: 466372 Sample Dates: 1/15/2018 - 1/19/2018 Nuclide Activity 2 Sigma Error MDA I-131 <4.88E-02 0.00E+00 4.88E-02 Cs-134 <3.95E-02 0.00E+00 3.95E-02 Cs-137 <3.28E-02 0.00E+00 3.28E-02 Be-7 <2.45E-01 0.00E+00 2.45E-01 K-40 <7.82E-01 0.00E+00 7.82E-01 Sample ID: 466960 Sample Dates: 1/22/2018 - 1/29/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.29E-02 0.00E+00 2.29E-02 Cs-134 <2.05E-02 0.00E+00 2.05E-02 Cs-137 <1.80E-02 0.00E+00 1.80E-02 Be-7 <1.35E-01 0.00E+00 1.35E-01 K-40 4.59E-01 1.88E-01 1.98E-01 Sample ID: 467319 Sample Dates: 1/29/2018 - 2/5/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.74E-02 0.00E+00 2.74E-02 Cs-134 <1.84E-02 0.00E+00 1.84E-02 Cs-137 <1.35E-02 0.00E+00 1.35E-02 Be-7 <1.24E-01 0.00E+00 1.24E-01 K-40 4.96E-01 2.30E-01 3.02E-01 Sample ID: 467628 Sample Dates: 2/5/2018 - 2/12/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.22E-02 0.00E+00 2.22E-02 Cs-134 <1.61E-02 0.00E+00 1.61E-02 Cs-137 <1.98E-02 0.00E+00 1.98E-02 Be-7 <1.26E-01 0.00E+00 1.26E-01 K-40 5.39E-01 1.89E-01 1.63E-01 Sample ID: 468420 Sample Dates: 2/12/2018 - 2/19/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.30E-02 0.00E+00 2.30E-02 Cs-134 <1.80E-02 0.00E+00 1.80E-02 Cs-137 <1.77E-02 0.00E+00 1.77E-02 Be-7 <1.25E-01 0.00E+00 1.25E-01 K-40 4.33E-01 1.93E-01 2.34E-01 Sample ID: 468741 Sample Dates: 2/19/2018 - 2/26/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.22E-02 0.00E+00 2.22E-02 Cs-134 <1.07E-02 0.00E+00 1.07E-02 Cs-137 <1.81E-02 0.00E+00 1.81E-02 Be-7 <1.39E-01 0.00E+00 1.39E-01 K-40 5.09E-01 2.22E-01 2.73E-01 Sample ID: 469553 Sample Dates: 2/26/2018 - 3/5/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.43E-02 0.00E+00 2.43E-02 Cs-134 <1.52E-02 0.00E+00 1.52E-02 Cs-137 <1.79E-02 0.00E+00 1.79E-02 Be-7 <1.13E-01 0.00E+00 1.13E-01 K-40 5.61E-01 2.00E-01 1.92E-01 Sample ID: 470575 Sample Dates: 3/5/2018 - 3/12/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.17E-02 0.00E+00 2.17E-02 Cs-134 <1.43E-02 0.00E+00 1.43E-02 Cs-137 <1.73E-02 0.00E+00 1.73E-02 Be-7 <1.11E-01 0.00E+00 1.11E-01 K-40 5.99E-01 1.81E-01 3.46E-02 Sample ID: 471142 Sample Dates: 3/12/2018 - 3/19/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.30E-02 0.00E+00 2.30E-02 Cs-134 <2.05E-02 0.00E+00 2.05E-02 Cs-137 <1.55E-02 0.00E+00 1.55E-02 Be-7 <1.17E-01 0.00E+00 1.17E-01 K-40 4.39E-01 1.77E-01 1.84E-01 Sample ID: 471697 Sample Dates: 3/19/2018 - 3/26/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.11E-02 0.00E+00 2.11E-02 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 30 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 2 Sample Point 2 [ INDICATOR - NNE @ 1.4 miles ]

Sample ID: 471697 Sample Dates: 3/19/2018 - 3/26/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.29E-02 0.00E+00 1.29E-02 Cs-137 <1.93E-02 0.00E+00 1.93E-02 Be-7 <1.35E-01 0.00E+00 1.35E-01 K-40 4.33E-01 2.18E-01 2.89E-01 Sample ID: 472484 Sample Dates: 3/26/2018 - 4/2/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.91E-02 0.00E+00 1.91E-02 Cs-134 <1.72E-02 0.00E+00 1.72E-02 Cs-137 <1.57E-02 0.00E+00 1.57E-02 Be-7 <1.11E-01 0.00E+00 1.11E-01 K-40 6.50E-01 2.14E-01 1.99E-01 Sample ID: 472959 Sample Dates: 4/2/2018 - 4/9/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.27E-02 0.00E+00 2.27E-02 Cs-134 <2.01E-02 0.00E+00 2.01E-02 Cs-137 <1.94E-02 0.00E+00 1.94E-02 Be-7 <1.34E-01 0.00E+00 1.34E-01 K-40 5.57E-01 2.28E-01 2.75E-01 Sample ID: 473250 Sample Dates: 4/9/2018 - 4/16/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.13E-02 0.00E+00 2.13E-02 Cs-134 <1.88E-02 0.00E+00 1.88E-02 Cs-137 <1.75E-02 0.00E+00 1.75E-02 Be-7 <1.21E-01 0.00E+00 1.21E-01 K-40 3.59E-01 1.79E-01 2.23E-01 Sample ID: 473615 Sample Dates: 4/16/2018 - 4/23/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.42E-02 0.00E+00 2.42E-02 Cs-134 <1.79E-02 0.00E+00 1.79E-02 Cs-137 <1.79E-02 0.00E+00 1.79E-02 Be-7 <1.16E-01 0.00E+00 1.16E-01 K-40 5.55E-01 1.88E-01 1.43E-01 Sample ID: 474135 Sample Dates: 4/23/2018 - 4/30/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.14E-02 0.00E+00 2.14E-02 Cs-134 <1.57E-02 0.00E+00 1.57E-02 Cs-137 <1.66E-02 0.00E+00 1.66E-02 Be-7 <9.75E-02 0.00E+00 9.75E-02 K-40 4.41E-01 1.97E-01 2.38E-01 Sample ID: 474513 Sample Dates: 4/30/2018 - 5/7/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.45E-02 0.00E+00 2.45E-02 Cs-134 <2.07E-02 0.00E+00 2.07E-02 Cs-137 <1.99E-02 0.00E+00 1.99E-02 Be-7 <1.29E-01 0.00E+00 1.29E-01 K-40 5.50E-01 1.93E-01 1.70E-01 Sample ID: 474872 Sample Dates: 5/7/2018 - 5/14/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.27E-02 0.00E+00 2.27E-02 Cs-134 <1.31E-02 0.00E+00 1.31E-02 Cs-137 <1.86E-02 0.00E+00 1.86E-02 Be-7 <1.24E-01 0.00E+00 1.24E-01 K-40 4.36E-01 1.95E-01 2.36E-01 Sample ID: 475196 Sample Dates: 5/14/2018 - 5/21/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.42E-02 0.00E+00 2.42E-02 Cs-134 <1.72E-02 0.00E+00 1.72E-02 Cs-137 <1.52E-02 0.00E+00 1.52E-02 Be-7 <1.21E-01 0.00E+00 1.21E-01 K-40 4.73E-01 1.77E-01 1.51E-01 Sample ID: 475521 Sample Dates: 5/21/2018 - 5/29/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.97E-02 0.00E+00 1.97E-02 Cs-134 <1.38E-02 0.00E+00 1.38E-02 Cs-137 <1.50E-02 0.00E+00 1.50E-02 Be-7 <1.03E-01 0.00E+00 1.03E-01 K-40 4.51E-01 1.68E-01 1.66E-01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 31 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 2 Sample Point 2 [ INDICATOR - NNE @ 1.4 miles ]

Sample ID: 476346 Sample Dates: 5/29/2018 - 6/4/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.81E-02 0.00E+00 2.81E-02 Cs-134 <2.17E-02 0.00E+00 2.17E-02 Cs-137 <2.14E-02 0.00E+00 2.14E-02 Be-7 <1.65E-01 0.00E+00 1.65E-01 K-40 6.45E-01 2.32E-01 2.24E-01 Sample ID: 477358 Sample Dates: 6/4/2018 - 6/11/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.18E-02 0.00E+00 2.18E-02 Cs-134 <1.64E-02 0.00E+00 1.64E-02 Cs-137 <1.57E-02 0.00E+00 1.57E-02 Be-7 <1.13E-01 0.00E+00 1.13E-01 K-40 5.55E-01 2.05E-01 2.15E-01 Sample ID: 478088 Sample Dates: 6/11/2018 - 6/18/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.66E-02 0.00E+00 2.66E-02 Cs-134 <2.11E-02 0.00E+00 2.11E-02 Cs-137 <1.89E-02 0.00E+00 1.89E-02 Be-7 <1.27E-01 0.00E+00 1.27E-01 K-40 5.56E-01 1.88E-01 1.42E-01 Sample ID: 478408 Sample Dates: 6/18/2018 - 6/25/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.16E-02 0.00E+00 2.16E-02 Cs-134 <1.78E-02 0.00E+00 1.78E-02 Cs-137 <1.77E-02 0.00E+00 1.77E-02 Be-7 <1.44E-01 0.00E+00 1.44E-01 K-40 5.88E-01 2.23E-01 2.53E-01 Sample ID: 478768 Sample Dates: 6/25/2018 - 7/2/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.07E-02 0.00E+00 2.07E-02 Cs-134 <1.81E-02 0.00E+00 1.81E-02 Cs-137 <1.60E-02 0.00E+00 1.60E-02 Be-7 <1.19E-01 0.00E+00 1.19E-01 K-40 <3.80E-01 0.00E+00 3.80E-01 Sample ID: 479040 Sample Dates: 7/2/2018 - 7/9/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.73E-02 0.00E+00 1.73E-02 Cs-134 <1.63E-02 0.00E+00 1.63E-02 Cs-137 <1.87E-02 0.00E+00 1.87E-02 Be-7 <1.02E-01 0.00E+00 1.02E-01 K-40 5.91E-01 1.87E-01 1.26E-01 Sample ID: 479861 Sample Dates: 7/9/2018 - 7/16/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.30E-02 0.00E+00 2.30E-02 Cs-134 <1.48E-02 0.00E+00 1.48E-02 Cs-137 <1.88E-02 0.00E+00 1.88E-02 Be-7 <1.29E-01 0.00E+00 1.29E-01 K-40 <4.04E-01 0.00E+00 4.04E-01 Sample ID: 480231 Sample Dates: 7/16/2018 - 7/23/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.67E-02 0.00E+00 1.67E-02 Cs-134 <1.34E-02 0.00E+00 1.34E-02 Cs-137 <1.99E-02 0.00E+00 1.99E-02 Be-7 <1.11E-01 0.00E+00 1.11E-01 K-40 3.94E-01 1.91E-01 2.40E-01 Sample ID: 481058 Sample Dates: 7/23/2018 - 7/30/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.56E-02 0.00E+00 2.56E-02 Cs-134 <2.12E-02 0.00E+00 2.12E-02 Cs-137 <1.52E-02 0.00E+00 1.52E-02 Be-7 <1.22E-01 0.00E+00 1.22E-01 K-40 3.73E-01 1.95E-01 2.54E-01 Sample ID: 481502 Sample Dates: 7/30/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.44E-02 0.00E+00 2.44E-02 Cs-134 <1.48E-02 0.00E+00 1.48E-02 Cs-137 <1.49E-02 0.00E+00 1.49E-02 Be-7 <1.34E-01 0.00E+00 1.34E-01 K-40 6.19E-01 2.05E-01 1.86E-01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 32 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 2 Sample Point 2 [ INDICATOR - NNE @ 1.4 miles ]

Sample ID: 481935 Sample Dates: 8/6/2018 - 8/13/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.30E-02 0.00E+00 2.30E-02 Cs-134 <1.71E-02 0.00E+00 1.71E-02 Cs-137 <1.84E-02 0.00E+00 1.84E-02 Be-7 <1.35E-01 0.00E+00 1.35E-01 K-40 3.87E-01 1.69E-01 1.76E-01 Sample ID: 482467 Sample Dates: 8/13/2018 - 8/20/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.44E-02 0.00E+00 1.44E-02 Cs-134 <8.53E-03 0.00E+00 8.53E-03 Cs-137 <1.54E-02 0.00E+00 1.54E-02 Be-7 <1.20E-01 0.00E+00 1.20E-01 K-40 3.60E-01 1.56E-01 1.63E-01 Sample ID: 482792 Sample Dates: 8/20/2018 - 8/27/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.03E-02 0.00E+00 2.03E-02 Cs-134 <1.55E-02 0.00E+00 1.55E-02 Cs-137 <1.33E-02 0.00E+00 1.33E-02 Be-7 <9.72E-02 0.00E+00 9.72E-02 K-40 3.78E-01 1.77E-01 2.11E-01 Sample ID: 483417 Sample Dates: 8/27/2018 - 9/4/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.94E-02 0.00E+00 1.94E-02 Cs-134 <1.30E-02 0.00E+00 1.30E-02 Cs-137 <9.65E-03 0.00E+00 9.65E-03 Be-7 <1.42E-01 0.00E+00 1.42E-01 K-40 3.21E-01 1.68E-01 2.21E-01 Sample ID: 483992 Sample Dates: 9/4/2018 - 9/10/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.29E-02 0.00E+00 2.29E-02 Cs-134 <1.92E-02 0.00E+00 1.92E-02 Cs-137 <1.92E-02 0.00E+00 1.92E-02 Be-7 <1.51E-01 0.00E+00 1.51E-01 K-40 4.77E-01 2.19E-01 2.58E-01 Sample ID: 484162 Sample Dates: 9/10/2018 - 9/17/2018 Nuclide Activity 2 Sigma Error MDA I-131 <3.32E-02 0.00E+00 3.32E-02 Cs-134 <1.91E-02 0.00E+00 1.91E-02 Cs-137 <2.05E-02 0.00E+00 2.05E-02 Be-7 <1.34E-01 0.00E+00 1.34E-01 K-40 3.30E-01 1.49E-01 1.50E-01 Sample ID: 485013 Sample Dates: 9/17/2018 - 9/24/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.41E-02 0.00E+00 2.41E-02 Cs-134 <1.89E-02 0.00E+00 1.89E-02 Cs-137 <1.61E-02 0.00E+00 1.61E-02 Be-7 <1.35E-01 0.00E+00 1.35E-01 K-40 4.68E-01 1.74E-01 1.45E-01 Sample ID: 485243 Sample Dates: 9/24/2018 - 10/1/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.86E-02 0.00E+00 2.86E-02 Cs-134 <1.47E-02 0.00E+00 1.47E-02 Cs-137 <1.54E-02 0.00E+00 1.54E-02 Be-7 <1.12E-01 0.00E+00 1.12E-01 K-40 5.21E-01 1.87E-01 1.75E-01 Sample ID: 486137 Sample Dates: 10/1/2018 - 10/8/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.26E-02 0.00E+00 2.26E-02 Cs-134 <1.66E-02 0.00E+00 1.66E-02 Cs-137 <1.60E-02 0.00E+00 1.60E-02 Be-7 <1.09E-01 0.00E+00 1.09E-01 K-40 3.51E-01 1.80E-01 2.22E-01 Sample ID: 486683 Sample Dates: 10/8/2018 - 10/15/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.34E-02 0.00E+00 2.34E-02 Cs-134 <1.42E-02 0.00E+00 1.42E-02 Cs-137 <1.34E-02 0.00E+00 1.34E-02 Be-7 <1.13E-01 0.00E+00 1.13E-01 K-40 4.31E-01 1.64E-01 1.37E-01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 33 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 2 Sample Point 2 [ INDICATOR - NNE @ 1.4 miles ]

Sample ID: 487722 Sample Dates: 10/15/2018 - 10/22/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.27E-02 0.00E+00 2.27E-02 Cs-134 <1.82E-02 0.00E+00 1.82E-02 Cs-137 <2.14E-02 0.00E+00 2.14E-02 Be-7 <1.17E-01 0.00E+00 1.17E-01 K-40 3.92E-01 1.68E-01 1.73E-01 Sample ID: 487969 Sample Dates: 10/22/2018 - 10/29/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.22E-02 0.00E+00 2.22E-02 Cs-134 <1.55E-02 0.00E+00 1.55E-02 Cs-137 <1.69E-02 0.00E+00 1.69E-02 Be-7 <1.41E-01 0.00E+00 1.41E-01 K-40 4.71E-01 1.70E-01 1.38E-01 Sample ID: 488454 Sample Dates: 10/29/2018 - 11/5/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.28E-02 0.00E+00 2.28E-02 Cs-134 <1.87E-02 0.00E+00 1.87E-02 Cs-137 <1.48E-02 0.00E+00 1.48E-02 Be-7 <1.21E-01 0.00E+00 1.21E-01 K-40 5.18E-01 2.07E-01 2.28E-01 Sample ID: 488830 Sample Dates: 11/5/2018 - 11/12/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.06E-02 0.00E+00 2.06E-02 Cs-134 <1.85E-02 0.00E+00 1.85E-02 Cs-137 <1.82E-02 0.00E+00 1.82E-02 Be-7 <1.11E-01 0.00E+00 1.11E-01 K-40 4.84E-01 1.84E-01 1.80E-01 Sample ID: 489134 Sample Dates: 11/12/2018 - 11/19/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.33E-02 0.00E+00 2.33E-02 Cs-134 <1.81E-02 0.00E+00 1.81E-02 Cs-137 <1.84E-02 0.00E+00 1.84E-02 Be-7 <1.09E-01 0.00E+00 1.09E-01 K-40 3.58E-01 1.82E-01 2.28E-01 Sample ID: 489719 Sample Dates: 11/19/2018 - 11/26/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.25E-02 0.00E+00 2.25E-02 Cs-134 <1.69E-02 0.00E+00 1.69E-02 Cs-137 <1.60E-02 0.00E+00 1.60E-02 Be-7 <1.10E-01 0.00E+00 1.10E-01 K-40 3.54E-01 1.58E-01 1.67E-01 Sample ID: 490135 Sample Dates: 11/26/2018 - 12/3/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.35E-02 0.00E+00 2.35E-02 Cs-134 <1.63E-02 0.00E+00 1.63E-02 Cs-137 <1.68E-02 0.00E+00 1.68E-02 Be-7 <1.23E-01 0.00E+00 1.23E-01 K-40 5.85E-01 2.05E-01 1.96E-01 Sample ID: 490781 Sample Dates: 12/3/2018 - 12/11/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.92E-02 0.00E+00 1.92E-02 Cs-134 <1.26E-02 0.00E+00 1.26E-02 Cs-137 <1.34E-02 0.00E+00 1.34E-02 Be-7 <1.24E-01 0.00E+00 1.24E-01 K-40 3.87E-01 1.64E-01 1.84E-01 Sample ID: 491161 Sample Dates: 12/11/2018 - 12/18/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.15E-02 0.00E+00 2.15E-02 Cs-134 <2.02E-02 0.00E+00 2.02E-02 Cs-137 <1.52E-02 0.00E+00 1.52E-02 Be-7 <9.81E-02 0.00E+00 9.81E-02 K-40 3.49E-01 1.66E-01 1.92E-01 Sample ID: 491465 Sample Dates: 12/18/2018 - 12/26/2018 Nuclide Activity 2 Sigma Error MDA I-131 <3.04E-02 0.00E+00 3.04E-02 Cs-134 <1.07E-02 0.00E+00 1.07E-02 Cs-137 <1.26E-02 0.00E+00 1.26E-02 Be-7 <1.12E-01 0.00E+00 1.12E-01 K-40 3.58E-01 1.87E-01 2.53E-01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 34 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 2 Sample Point 2 [ INDICATOR - NNE @ 1.4 miles ]

Sample ID: 491730 Sample Dates: 12/26/2018 - 12/31/2018 Nuclide Activity 2 Sigma Error MDA I-131 <4.66E-02 0.00E+00 4.66E-02 Cs-134 <2.13E-02 0.00E+00 2.13E-02 Cs-137 <2.64E-02 0.00E+00 2.64E-02 Be-7 <1.95E-01 0.00E+00 1.95E-01 K-40 <5.74E-01 0.00E+00 5.74E-01 Sample Point 4 [ INDICATOR - NNE @ 3.1 miles ]

Sample ID: 465976 Sample Dates: 1/2/2018 - 1/8/2018 Nuclide Activity 2 Sigma Error MDA I-131 <3.24E-02 0.00E+00 3.24E-02 Cs-134 <1.75E-02 0.00E+00 1.75E-02 Cs-137 <1.77E-02 0.00E+00 1.77E-02 Be-7 <1.85E-01 0.00E+00 1.85E-01 K-40 4.53E-01 1.86E-01 1.74E-01 Sample ID: 466176 Sample Dates: 1/8/2018 - 1/15/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.67E-02 0.00E+00 2.67E-02 Cs-134 <1.68E-02 0.00E+00 1.68E-02 Cs-137 <1.77E-02 0.00E+00 1.77E-02 Be-7 <1.31E-01 0.00E+00 1.31E-01 K-40 4.30E-01 1.71E-01 1.59E-01 Sample ID: 466374 Sample Dates: 1/15/2018 - 1/22/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.99E-02 0.00E+00 1.99E-02 Cs-134 <1.82E-02 0.00E+00 1.82E-02 Cs-137 <1.39E-02 0.00E+00 1.39E-02 Be-7 <1.35E-01 0.00E+00 1.35E-01 K-40 4.86E-01 2.05E-01 2.44E-01 Sample ID: 466962 Sample Dates: 1/22/2018 - 1/29/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.83E-02 0.00E+00 1.83E-02 Cs-134 <2.20E-02 0.00E+00 2.20E-02 Cs-137 <2.01E-02 0.00E+00 2.01E-02 Be-7 <1.03E-01 0.00E+00 1.03E-01 K-40 6.67E-01 2.07E-01 1.54E-01 Sample ID: 467321 Sample Dates: 1/29/2018 - 2/5/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.49E-02 0.00E+00 2.49E-02 Cs-134 <1.84E-02 0.00E+00 1.84E-02 Cs-137 <1.86E-02 0.00E+00 1.86E-02 Be-7 <1.27E-01 0.00E+00 1.27E-01 K-40 3.49E-01 1.82E-01 2.35E-01 Sample ID: 467630 Sample Dates: 2/5/2018 - 2/12/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.19E-02 0.00E+00 2.19E-02 Cs-134 <1.68E-02 0.00E+00 1.68E-02 Cs-137 <1.24E-02 0.00E+00 1.24E-02 Be-7 <1.17E-01 0.00E+00 1.17E-01 K-40 4.06E-01 1.81E-01 2.05E-01 Sample ID: 468422 Sample Dates: 2/12/2018 - 2/19/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.79E-02 0.00E+00 2.79E-02 Cs-134 <1.52E-02 0.00E+00 1.52E-02 Cs-137 <1.74E-02 0.00E+00 1.74E-02 Be-7 <1.21E-01 0.00E+00 1.21E-01 K-40 4.39E-01 1.88E-01 2.13E-01 Sample ID: 468743 Sample Dates: 2/19/2018 - 2/26/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.59E-02 0.00E+00 2.59E-02 Cs-134 <1.45E-02 0.00E+00 1.45E-02 Cs-137 <1.76E-02 0.00E+00 1.76E-02 Be-7 <1.36E-01 0.00E+00 1.36E-01 K-40 6.18E-01 2.09E-01 1.94E-01 Sample ID: 469555 Sample Dates: 2/26/2018 - 3/5/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.43E-02 0.00E+00 2.43E-02 Cs-134 <1.43E-02 0.00E+00 1.43E-02 Cs-137 <1.91E-02 0.00E+00 1.91E-02 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 35 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 4 Sample Point 4 [ INDICATOR - NNE @ 3.1 miles ]

Sample ID: 469555 Sample Dates: 2/26/2018 - 3/5/2018 Nuclide Activity 2 Sigma Error MDA Be-7 <1.25E-01 0.00E+00 1.25E-01 K-40 <3.70E-01 0.00E+00 3.70E-01 Sample ID: 470577 Sample Dates: 3/5/2018 - 3/12/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.40E-02 0.00E+00 2.40E-02 Cs-134 <1.66E-02 0.00E+00 1.66E-02 Cs-137 <1.91E-02 0.00E+00 1.91E-02 Be-7 <9.79E-02 0.00E+00 9.79E-02 K-40 4.18E-01 1.90E-01 2.27E-01 Sample ID: 471144 Sample Dates: 3/12/2018 - 3/19/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.32E-02 0.00E+00 2.32E-02 Cs-134 <1.68E-02 0.00E+00 1.68E-02 Cs-137 <1.32E-02 0.00E+00 1.32E-02 Be-7 <1.07E-01 0.00E+00 1.07E-01 K-40 3.46E-01 1.77E-01 2.24E-01 Sample ID: 471699 Sample Dates: 3/19/2018 - 3/26/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.12E-02 0.00E+00 2.12E-02 Cs-134 <1.74E-02 0.00E+00 1.74E-02 Cs-137 <1.87E-02 0.00E+00 1.87E-02 Be-7 <1.09E-01 0.00E+00 1.09E-01 K-40 6.70E-01 1.97E-01 3.63E-02 Sample ID: 472486 Sample Dates: 3/26/2018 - 4/2/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.47E-02 0.00E+00 2.47E-02 Cs-134 <1.79E-02 0.00E+00 1.79E-02 Cs-137 <1.58E-02 0.00E+00 1.58E-02 Be-7 <1.18E-01 0.00E+00 1.18E-01 K-40 4.77E-01 1.80E-01 1.70E-01 Sample ID: 472961 Sample Dates: 4/2/2018 - 4/9/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.43E-02 0.00E+00 2.43E-02 Cs-134 <1.94E-02 0.00E+00 1.94E-02 Cs-137 <1.60E-02 0.00E+00 1.60E-02 Be-7 <1.19E-01 0.00E+00 1.19E-01 K-40 3.64E-01 1.77E-01 2.12E-01 Sample ID: 473252 Sample Dates: 4/9/2018 - 4/16/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.24E-02 0.00E+00 2.24E-02 Cs-134 <1.75E-02 0.00E+00 1.75E-02 Cs-137 <1.65E-02 0.00E+00 1.65E-02 Be-7 <1.31E-01 0.00E+00 1.31E-01 K-40 4.41E-01 2.01E-01 2.49E-01 Sample ID: 473617 Sample Dates: 4/16/2018 - 4/23/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.37E-02 0.00E+00 2.37E-02 Cs-134 <1.49E-02 0.00E+00 1.49E-02 Cs-137 <1.89E-02 0.00E+00 1.89E-02 Be-7 <1.17E-01 0.00E+00 1.17E-01 K-40 7.55E-01 2.09E-01 3.59E-02 Sample ID: 474137 Sample Dates: 4/23/2018 - 4/30/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.52E-02 0.00E+00 2.52E-02 Cs-134 <1.40E-02 0.00E+00 1.40E-02 Cs-137 <1.65E-02 0.00E+00 1.65E-02 Be-7 <1.23E-01 0.00E+00 1.23E-01 K-40 3.96E-01 1.82E-01 2.17E-01 Sample ID: 474515 Sample Dates: 4/30/2018 - 5/7/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.48E-02 0.00E+00 2.48E-02 Cs-134 <1.62E-02 0.00E+00 1.62E-02 Cs-137 <1.77E-02 0.00E+00 1.77E-02 Be-7 <1.14E-01 0.00E+00 1.14E-01 K-40 4.44E-01 1.56E-01 3.54E-02 Sample ID: 474874 Sample Dates: 5/7/2018 - 5/14/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.46E-02 0.00E+00 2.46E-02 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 36 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 4 Sample Point 4 [ INDICATOR - NNE @ 3.1 miles ]

Sample ID: 474874 Sample Dates: 5/7/2018 - 5/14/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.87E-02 0.00E+00 1.87E-02 Cs-137 <1.65E-02 0.00E+00 1.65E-02 Be-7 <9.60E-02 0.00E+00 9.60E-02 K-40 4.53E-01 1.64E-01 1.21E-01 Sample ID: 475198 Sample Dates: 5/14/2018 - 5/21/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.03E-02 0.00E+00 2.03E-02 Cs-134 <1.55E-02 0.00E+00 1.55E-02 Cs-137 <1.63E-02 0.00E+00 1.63E-02 Be-7 <1.20E-01 0.00E+00 1.20E-01 K-40 4.18E-01 1.66E-01 1.48E-01 Sample ID: 475523 Sample Dates: 5/21/2018 - 5/29/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.11E-02 0.00E+00 2.11E-02 Cs-134 <1.56E-02 0.00E+00 1.56E-02 Cs-137 <1.38E-02 0.00E+00 1.38E-02 Be-7 <1.22E-01 0.00E+00 1.22E-01 K-40 3.12E-01 1.72E-01 2.33E-01 Sample ID: 476348 Sample Dates: 5/29/2018 - 6/4/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.08E-02 0.00E+00 2.08E-02 Cs-134 <1.77E-02 0.00E+00 1.77E-02 Cs-137 <2.33E-02 0.00E+00 2.33E-02 Be-7 <1.56E-01 0.00E+00 1.56E-01 K-40 4.30E-01 2.23E-01 2.90E-01 Sample ID: 477360 Sample Dates: 6/4/2018 - 6/11/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.02E-02 0.00E+00 2.03E-02 Cs-134 <1.41E-02 0.00E+00 1.41E-02 Cs-137 <1.67E-02 0.00E+00 1.67E-02 Be-7 <1.13E-01 0.00E+00 1.13E-01 K-40 6.18E-01 2.04E-01 1.82E-01 Sample ID: 478090 Sample Dates: 6/11/2018 - 6/18/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.51E-02 0.00E+00 2.51E-02 Cs-134 <1.86E-02 0.00E+00 1.86E-02 Cs-137 <1.79E-02 0.00E+00 1.79E-02 Be-7 <1.47E-01 0.00E+00 1.47E-01 K-40 4.88E-01 1.82E-01 1.63E-01 Sample ID: 478410 Sample Dates: 6/18/2018 - 6/25/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.77E-02 0.00E+00 2.77E-02 Cs-134 <1.78E-02 0.00E+00 1.78E-02 Cs-137 <1.57E-02 0.00E+00 1.57E-02 Be-7 <1.22E-01 0.00E+00 1.22E-01 K-40 4.05E-01 2.21E-01 3.06E-01 Sample ID: 478770 Sample Dates: 6/25/2018 - 7/2/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.14E-02 0.00E+00 2.14E-02 Cs-134 <1.69E-02 0.00E+00 1.69E-02 Cs-137 <1.50E-02 0.00E+00 1.50E-02 Be-7 <1.32E-01 0.00E+00 1.32E-01 K-40 4.72E-01 1.97E-01 2.22E-01 Sample ID: 479042 Sample Dates: 7/2/2018 - 7/9/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.06E-02 0.00E+00 2.06E-02 Cs-134 <1.74E-02 0.00E+00 1.74E-02 Cs-137 <1.49E-02 0.00E+00 1.49E-02 Be-7 <1.35E-01 0.00E+00 1.35E-01 K-40 3.69E-01 1.58E-01 1.57E-01 Sample ID: 479863 Sample Dates: 7/9/2018 - 7/16/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.14E-02 0.00E+00 2.14E-02 Cs-134 <2.05E-02 0.00E+00 2.05E-02 Cs-137 <1.80E-02 0.00E+00 1.80E-02 Be-7 <1.11E-01 0.00E+00 1.11E-01 K-40 4.19E-01 1.81E-01 1.97E-01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 37 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 4 Sample Point 4 [ INDICATOR - NNE @ 3.1 miles ]

Sample ID: 480233 Sample Dates: 7/16/2018 - 7/23/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.94E-02 0.00E+00 1.94E-02 Cs-134 <1.84E-02 0.00E+00 1.84E-02 Cs-137 <1.85E-02 0.00E+00 1.85E-02 Be-7 <1.00E-01 0.00E+00 1.00E-01 K-40 6.59E-01 1.99E-01 1.33E-01 Sample ID: 481060 Sample Dates: 7/23/2018 - 7/30/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.49E-02 0.00E+00 2.49E-02 Cs-134 <1.89E-02 0.00E+00 1.89E-02 Cs-137 <1.71E-02 0.00E+00 1.71E-02 Be-7 <1.15E-01 0.00E+00 1.15E-01 K-40 3.64E-01 1.92E-01 2.51E-01 Sample ID: 481504 Sample Dates: 7/30/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.74E-02 0.00E+00 2.74E-02 Cs-134 <1.70E-02 0.00E+00 1.70E-02 Cs-137 <1.87E-02 0.00E+00 1.87E-02 Be-7 <1.24E-01 0.00E+00 1.24E-01 K-40 <3.93E-01 0.00E+00 3.93E-01 Sample ID: 481937 Sample Dates: 8/6/2018 - 8/13/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.10E-02 0.00E+00 2.10E-02 Cs-134 <1.56E-02 0.00E+00 1.56E-02 Cs-137 <1.63E-02 0.00E+00 1.63E-02 Be-7 <1.24E-01 0.00E+00 1.24E-01 K-40 6.61E-01 2.11E-01 1.75E-01 Sample ID: 482469 Sample Dates: 8/13/2018 - 8/20/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.64E-02 0.00E+00 1.64E-02 Cs-134 <1.56E-02 0.00E+00 1.56E-02 Cs-137 <1.69E-02 0.00E+00 1.69E-02 Be-7 <9.12E-02 0.00E+00 9.12E-02 K-40 2.17E-01 1.49E-01 2.10E-01 Sample ID: 482794 Sample Dates: 8/20/2018 - 8/27/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.64E-02 0.00E+00 1.64E-02 Cs-134 <1.65E-02 0.00E+00 1.65E-02 Cs-137 <1.42E-02 0.00E+00 1.42E-02 Be-7 <8.63E-02 0.00E+00 8.63E-02 K-40 <2.94E-01 0.00E+00 2.94E-01 Sample ID: 483419 Sample Dates: 8/27/2018 - 9/4/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.01E-02 0.00E+00 2.01E-02 Cs-134 <1.59E-02 0.00E+00 1.59E-02 Cs-137 <1.36E-02 0.00E+00 1.36E-02 Be-7 <1.02E-01 0.00E+00 1.02E-01 K-40 4.93E-01 1.78E-01 1.81E-01 Sample ID: 483994 Sample Dates: 9/4/2018 - 9/10/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.46E-02 0.00E+00 2.46E-02 Cs-134 <2.01E-02 0.00E+00 2.01E-02 Cs-137 <2.21E-02 0.00E+00 2.21E-02 Be-7 <1.51E-01 0.00E+00 1.51E-01 K-40 5.24E-01 2.20E-01 2.37E-01 Sample ID: 484164 Sample Dates: 9/10/2018 - 9/17/2018 Nuclide Activity 2 Sigma Error MDA I-131 <3.19E-02 0.00E+00 3.19E-02 Cs-134 <1.67E-02 0.00E+00 1.67E-02 Cs-137 <1.88E-02 0.00E+00 1.88E-02 Be-7 <1.27E-01 0.00E+00 1.27E-01 K-40 <3.51E-01 0.00E+00 3.51E-01 Sample ID: 485015 Sample Dates: 9/17/2018 - 9/24/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.41E-02 0.00E+00 2.41E-02 Cs-134 <1.38E-02 0.00E+00 1.38E-02 Cs-137 <2.09E-02 0.00E+00 2.09E-02 Be-7 <1.18E-01 0.00E+00 1.18E-01 K-40 4.75E-01 1.95E-01 2.13E-01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 38 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 4 Sample Point 4 [ INDICATOR - NNE @ 3.1 miles ]

Sample ID: 485245 Sample Dates: 9/24/2018 - 10/1/2018 Nuclide Activity 2 Sigma Error MDA I-131 <3.78E-02 0.00E+00 3.78E-02 Cs-134 <2.01E-02 0.00E+00 2.01E-02 Cs-137 <1.76E-02 0.00E+00 1.76E-02 Be-7 <1.49E-01 0.00E+00 1.49E-01 K-40 4.11E-01 2.09E-01 2.75E-01 Sample ID: 486139 Sample Dates: 10/1/2018 - 10/8/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.03E-02 0.00E+00 2.03E-02 Cs-134 <1.72E-02 0.00E+00 1.72E-02 Cs-137 <1.68E-02 0.00E+00 1.68E-02 Be-7 <1.33E-01 0.00E+00 1.33E-01 K-40 4.47E-01 1.65E-01 1.30E-01 Sample ID: 486685 Sample Dates: 10/8/2018 - 10/15/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.78E-02 0.00E+00 2.78E-02 Cs-134 <2.09E-02 0.00E+00 2.09E-02 Cs-137 <1.66E-02 0.00E+00 1.66E-02 Be-7 <1.28E-01 0.00E+00 1.28E-01 K-40 4.75E-01 1.97E-01 2.05E-01 Sample ID: 487724 Sample Dates: 10/15/2018 - 10/22/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.58E-02 0.00E+00 2.58E-02 Cs-134 <1.88E-02 0.00E+00 1.88E-02 Cs-137 <1.60E-02 0.00E+00 1.60E-02 Be-7 <1.32E-01 0.00E+00 1.32E-01 K-40 3.88E-01 1.45E-01 3.51E-02 Sample ID: 487971 Sample Dates: 10/22/2018 - 10/29/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.24E-02 0.00E+00 2.24E-02 Cs-134 <1.69E-02 0.00E+00 1.69E-02 Cs-137 <1.69E-02 0.00E+00 1.69E-02 Be-7 <1.13E-01 0.00E+00 1.13E-01 K-40 3.92E-01 1.98E-01 2.59E-01 Sample ID: 488456 Sample Dates: 10/29/2018 - 11/5/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.01E-02 0.00E+00 2.01E-02 Cs-134 <1.79E-02 0.00E+00 1.79E-02 Cs-137 <1.85E-02 0.00E+00 1.85E-02 Be-7 <1.04E-01 0.00E+00 1.04E-01 K-40 4.15E-01 1.86E-01 2.13E-01 Sample ID: 488832 Sample Dates: 11/5/2018 - 11/12/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.25E-02 0.00E+00 2.25E-02 Cs-134 <2.03E-02 0.00E+00 2.03E-02 Cs-137 <1.47E-02 0.00E+00 1.47E-02 Be-7 <1.08E-01 0.00E+00 1.08E-01 K-40 5.60E-01 1.86E-01 1.38E-01 Sample ID: 489136 Sample Dates: 11/12/2018 - 11/19/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.18E-02 0.00E+00 2.18E-02 Cs-134 <1.74E-02 0.00E+00 1.74E-02 Cs-137 <1.84E-02 0.00E+00 1.84E-02 Be-7 <1.18E-01 0.00E+00 1.18E-01 K-40 4.97E-01 1.72E-01 1.16E-01 Sample ID: 489721 Sample Dates: 11/19/2018 - 11/26/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.43E-02 0.00E+00 2.43E-02 Cs-134 <1.95E-02 0.00E+00 1.95E-02 Cs-137 <1.80E-02 0.00E+00 1.80E-02 Be-7 <1.05E-01 0.00E+00 1.05E-01 K-40 4.44E-01 1.95E-01 2.31E-01 Sample ID: 490137 Sample Dates: 11/26/2018 - 12/3/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.16E-02 0.00E+00 2.16E-02 Cs-134 <1.90E-02 0.00E+00 1.90E-02 Cs-137 <1.95E-02 0.00E+00 1.95E-02 Be-7 <1.28E-01 0.00E+00 1.28E-01 K-40 5.00E-01 1.87E-01 1.75E-01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 39 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 4 Sample Point 4 [ INDICATOR - NNE @ 3.1 miles ]

Sample ID: 490783 Sample Dates: 12/3/2018 - 12/11/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.11E-02 0.00E+00 2.11E-02 Cs-134 <1.52E-02 0.00E+00 1.52E-02 Cs-137 <1.92E-02 0.00E+00 1.92E-02 Be-7 <1.05E-01 0.00E+00 1.05E-01 K-40 3.62E-01 1.86E-01 2.49E-01 Sample ID: 491163 Sample Dates: 12/11/2018 - 12/18/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.07E-02 0.00E+00 2.07E-02 Cs-134 <1.64E-02 0.00E+00 1.64E-02 Cs-137 <1.27E-02 0.00E+00 1.27E-02 Be-7 <9.11E-02 0.00E+00 9.11E-02 K-40 2.85E-01 1.33E-01 1.18E-01 Sample ID: 491467 Sample Dates: 12/18/2018 - 12/26/2018 Nuclide Activity 2 Sigma Error MDA I-131 <3.27E-02 0.00E+00 3.27E-02 Cs-134 <1.42E-02 0.00E+00 1.42E-02 Cs-137 <1.35E-02 0.00E+00 1.35E-02 Be-7 <1.09E-01 0.00E+00 1.09E-01 K-40 <2.98E-01 0.00E+00 2.98E-01 Sample ID: 491732 Sample Dates: 12/26/2018 - 12/31/2018 Nuclide Activity 2 Sigma Error MDA I-131 <4.85E-02 0.00E+00 4.85E-02 Cs-134 <2.94E-02 0.00E+00 2.94E-02 Cs-137 <2.57E-02 0.00E+00 2.57E-02 Be-7 <1.76E-01 0.00E+00 1.76E-01 K-40 <5.81E-01 0.00E+00 5.81E-01 Sample Point 5 [ CONTROL - WNW @ 12 miles ]

Sample ID: 465978 Sample Dates: 1/2/2018 - 1/8/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.59E-02 0.00E+00 2.59E-02 Cs-134 <1.83E-02 0.00E+00 1.83E-02 Cs-137 <2.00E-02 0.00E+00 2.00E-02 Be-7 <1.34E-01 0.00E+00 1.34E-01 K-40 4.39E-01 2.00E-01 2.29E-01 Sample ID: 466178 Sample Dates: 1/8/2018 - 1/15/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.36E-02 0.00E+00 2.36E-02 Cs-134 <1.95E-02 0.00E+00 1.95E-02 Cs-137 <1.99E-02 0.00E+00 1.99E-02 Be-7 <1.44E-01 0.00E+00 1.44E-01 K-40 5.19E-01 1.92E-01 1.85E-01 Sample ID: 466376 Sample Dates: 1/15/2018 - 1/22/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.35E-02 0.00E+00 2.35E-02 Cs-134 <1.92E-02 0.00E+00 1.92E-02 Cs-137 <1.87E-02 0.00E+00 1.87E-02 Be-7 1.64E-03 7.20E-02 1.33E-01 K-40 3.80E-01 1.61E-01 1.59E-01 Sample ID: 466964 Sample Dates: 1/22/2018 - 1/29/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.16E-02 0.00E+00 2.16E-02 Cs-134 <1.70E-02 0.00E+00 1.70E-02 Cs-137 <1.51E-02 0.00E+00 1.51E-02 Be-7 <1.20E-01 0.00E+00 1.20E-01 K-40 <3.90E-01 0.00E+00 3.90E-01 Sample ID: 467323 Sample Dates: 1/29/2018 - 2/5/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.71E-02 0.00E+00 2.71E-02 Cs-134 <1.58E-02 0.00E+00 1.58E-02 Cs-137 <1.72E-02 0.00E+00 1.72E-02 Be-7 <1.21E-01 0.00E+00 1.21E-01 K-40 4.44E-01 1.66E-01 1.37E-01 Sample ID: 467632 Sample Dates: 2/5/2018 - 2/12/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.12E-02 0.00E+00 2.12E-02 Cs-134 <1.68E-02 0.00E+00 1.68E-02 Cs-137 <1.85E-02 0.00E+00 1.85E-02 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 40 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 5 Sample Point 5 [ CONTROL - WNW @ 12 miles ]

Sample ID: 467632 Sample Dates: 2/5/2018 - 2/12/2018 Nuclide Activity 2 Sigma Error MDA Be-7 <1.29E-01 0.00E+00 1.29E-01 K-40 4.27E-01 1.65E-01 1.38E-01 Sample ID: 468424 Sample Dates: 2/12/2018 - 2/19/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.97E-02 0.00E+00 2.97E-02 Cs-134 <1.69E-02 0.00E+00 1.69E-02 Cs-137 <1.70E-02 0.00E+00 1.70E-02 Be-7 <1.08E-01 0.00E+00 1.08E-01 K-40 5.12E-01 1.65E-01 3.38E-02 Sample ID: 468745 Sample Dates: 2/19/2018 - 2/26/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.01E-02 0.00E+00 2.01E-02 Cs-134 <1.48E-02 0.00E+00 1.48E-02 Cs-137 <1.84E-02 0.00E+00 1.84E-02 Be-7 <1.38E-01 0.00E+00 1.38E-01 K-40 6.21E-01 1.88E-01 3.58E-02 Sample ID: 469557 Sample Dates: 2/26/2018 - 3/5/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.36E-02 0.00E+00 2.36E-02 Cs-134 <1.89E-02 0.00E+00 1.89E-02 Cs-137 <1.66E-02 0.00E+00 1.66E-02 Be-7 <1.17E-01 0.00E+00 1.17E-01 K-40 4.66E-01 2.01E-01 2.39E-01 Sample ID: 470579 Sample Dates: 3/5/2018 - 3/12/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.72E-02 0.00E+00 1.72E-02 Cs-134 <1.90E-02 0.00E+00 1.90E-02 Cs-137 <1.72E-02 0.00E+00 1.72E-02 Be-7 <1.07E-01 0.00E+00 1.07E-01 K-40 3.49E-01 2.15E-01 3.08E-01 Sample ID: 471146 Sample Dates: 3/12/2018 - 3/19/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.66E-02 0.00E+00 2.66E-02 Cs-134 <1.42E-02 0.00E+00 1.42E-02 Cs-137 <1.72E-02 0.00E+00 1.72E-02 Be-7 <1.33E-01 0.00E+00 1.33E-01 K-40 4.60E-01 1.87E-01 2.02E-01 Sample ID: 471701 Sample Dates: 3/19/2018 - 3/26/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.29E-02 0.00E+00 2.29E-02 Cs-134 <1.77E-02 0.00E+00 1.77E-02 Cs-137 <1.62E-02 0.00E+00 1.62E-02 Be-7 <1.13E-01 0.00E+00 1.13E-01 K-40 4.98E-01 1.88E-01 1.80E-01 Sample ID: 472488 Sample Dates: 3/26/2018 - 4/2/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.32E-02 0.00E+00 2.32E-02 Cs-134 <1.65E-02 0.00E+00 1.65E-02 Cs-137 <1.14E-02 0.00E+00 1.14E-02 Be-7 <1.23E-01 0.00E+00 1.23E-01 K-40 5.83E-01 1.89E-01 1.37E-01 Sample ID: 472963 Sample Dates: 4/2/2018 - 4/9/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.03E-02 0.00E+00 2.03E-02 Cs-134 <1.68E-02 0.00E+00 1.68E-02 Cs-137 <1.81E-02 0.00E+00 1.81E-02 Be-7 <1.20E-01 0.00E+00 1.20E-01 K-40 2.90E-01 1.65E-01 2.13E-01 Sample ID: 473254 Sample Dates: 4/9/2018 - 4/16/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.98E-02 0.00E+00 1.98E-02 Cs-134 <1.78E-02 0.00E+00 1.78E-02 Cs-137 <1.90E-02 0.00E+00 1.90E-02 Be-7 <1.28E-01 0.00E+00 1.28E-01 K-40 5.01E-01 2.44E-01 3.31E-01 Sample ID: 473619 Sample Dates: 4/16/2018 - 4/23/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.62E-02 0.00E+00 2.62E-02 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 41 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 5 Sample Point 5 [ CONTROL - WNW @ 12 miles ]

Sample ID: 473619 Sample Dates: 4/16/2018 - 4/23/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.53E-02 0.00E+00 1.53E-02 Cs-137 <1.94E-02 0.00E+00 1.94E-02 Be-7 <1.40E-01 0.00E+00 1.40E-01 K-40 4.26E-01 1.52E-01 3.50E-02 Sample ID: 474139 Sample Dates: 4/23/2018 - 4/30/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.33E-02 0.00E+00 2.33E-02 Cs-134 <1.78E-02 0.00E+00 1.78E-02 Cs-137 <2.02E-02 0.00E+00 2.02E-02 Be-7 <1.09E-01 0.00E+00 1.09E-01 K-40 3.67E-01 1.53E-01 1.39E-01 Sample ID: 474517 Sample Dates: 4/30/2018 - 5/7/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.22E-02 0.00E+00 2.22E-02 Cs-134 <1.61E-02 0.00E+00 1.61E-02 Cs-137 <2.10E-02 0.00E+00 2.10E-02 Be-7 <1.42E-01 0.00E+00 1.42E-01 K-40 5.55E-01 1.95E-01 1.77E-01 Sample ID: 474876 Sample Dates: 5/7/2018 - 5/14/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.19E-02 0.00E+00 2.19E-02 Cs-134 <1.65E-02 0.00E+00 1.65E-02 Cs-137 <1.62E-02 0.00E+00 1.62E-02 Be-7 <1.21E-01 0.00E+00 1.21E-01 K-40 5.74E-01 1.98E-01 1.82E-01 Sample ID: 475200 Sample Dates: 5/14/2018 - 5/21/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.30E-02 0.00E+00 2.30E-02 Cs-134 <1.95E-02 0.00E+00 1.95E-02 Cs-137 <1.56E-02 0.00E+00 1.56E-02 Be-7 <1.34E-01 0.00E+00 1.34E-01 K-40 3.79E-01 1.56E-01 1.37E-01 Sample ID: 475525 Sample Dates: 5/21/2018 - 5/29/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.89E-02 0.00E+00 1.89E-02 Cs-134 <1.67E-02 0.00E+00 1.67E-02 Cs-137 <1.77E-02 0.00E+00 1.77E-02 Be-7 <1.06E-01 0.00E+00 1.06E-01 K-40 3.26E-01 1.52E-01 1.78E-01 Sample ID: 476350 Sample Dates: 5/29/2018 - 6/4/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.88E-02 0.00E+00 2.88E-02 Cs-134 <1.94E-02 0.00E+00 1.94E-02 Cs-137 <1.59E-02 0.00E+00 1.59E-02 Be-7 <1.35E-01 0.00E+00 1.35E-01 K-40 5.55E-01 2.57E-01 3.31E-01 Sample ID: 477362 Sample Dates: 6/4/2018 - 6/11/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.00E-02 0.00E+00 2.00E-02 Cs-134 <1.98E-02 0.00E+00 1.98E-02 Cs-137 <2.00E-02 0.00E+00 2.00E-02 Be-7 <1.09E-01 0.00E+00 1.09E-01 K-40 5.19E-01 2.05E-01 2.29E-01 Sample ID: 478092 Sample Dates: 6/11/2018 - 6/18/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.85E-02 0.00E+00 2.85E-02 Cs-134 <2.01E-02 0.00E+00 2.01E-02 Cs-137 <1.86E-02 0.00E+00 1.86E-02 Be-7 <1.31E-01 0.00E+00 1.31E-01 K-40 4.05E-01 2.00E-01 2.55E-01 Sample ID: 478412 Sample Dates: 6/18/2018 - 6/25/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.77E-02 0.00E+00 2.77E-02 Cs-134 <1.70E-02 0.00E+00 1.70E-02 Cs-137 <1.73E-02 0.00E+00 1.73E-02 Be-7 <1.23E-01 0.00E+00 1.23E-01 K-40 3.86E-01 1.88E-01 2.32E-01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 42 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 5 Sample Point 5 [ CONTROL - WNW @ 12 miles ]

Sample ID: 478772 Sample Dates: 6/25/2018 - 7/2/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.06E-02 0.00E+00 2.06E-02 Cs-134 <2.11E-02 0.00E+00 2.11E-02 Cs-137 <1.49E-02 0.00E+00 1.49E-02 Be-7 <1.30E-01 0.00E+00 1.30E-01 K-40 6.20E-01 2.45E-01 2.99E-01 Sample ID: 479044 Sample Dates: 7/2/2018 - 7/9/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.31E-02 0.00E+00 2.31E-02 Cs-134 <1.56E-02 0.00E+00 1.56E-02 Cs-137 <1.65E-02 0.00E+00 1.65E-02 Be-7 <1.23E-01 0.00E+00 1.23E-01 K-40 5.46E-01 1.88E-01 1.62E-01 Sample ID: 479865 Sample Dates: 7/9/2018 - 7/16/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.20E-02 0.00E+00 2.20E-02 Cs-134 <1.98E-02 0.00E+00 1.98E-02 Cs-137 <2.06E-02 0.00E+00 2.06E-02 Be-7 <1.29E-01 0.00E+00 1.29E-01 K-40 3.96E-01 2.22E-01 3.08E-01 Sample ID: 480235 Sample Dates: 7/16/2018 - 7/23/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.58E-02 0.00E+00 2.58E-02 Cs-134 <1.78E-02 0.00E+00 1.78E-02 Cs-137 <1.86E-02 0.00E+00 1.86E-02 Be-7 <1.14E-01 0.00E+00 1.14E-01 K-40 5.16E-01 1.82E-01 1.52E-01 Sample ID: 481062 Sample Dates: 7/23/2018 - 7/30/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.44E-02 0.00E+00 2.44E-02 Cs-134 <1.34E-02 0.00E+00 1.34E-02 Cs-137 <2.09E-02 0.00E+00 2.09E-02 Be-7 <1.44E-01 0.00E+00 1.44E-01 K-40 <3.65E-01 0.00E+00 3.65E-01 Sample ID: 481506 Sample Dates: 7/30/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.62E-02 0.00E+00 2.62E-02 Cs-134 <1.55E-02 0.00E+00 1.55E-02 Cs-137 <1.74E-02 0.00E+00 1.74E-02 Be-7 <1.08E-01 0.00E+00 1.08E-01 K-40 4.96E-01 1.75E-01 1.44E-01 Sample ID: 481939 Sample Dates: 8/6/2018 - 8/13/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.16E-02 0.00E+00 2.16E-02 Cs-134 <1.39E-02 0.00E+00 1.39E-02 Cs-137 <1.93E-02 0.00E+00 1.93E-02 Be-7 <1.30E-01 0.00E+00 1.30E-01 K-40 6.13E-01 2.23E-01 2.37E-01 Sample ID: 482471 Sample Dates: 8/13/2018 - 8/20/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.78E-02 0.00E+00 1.78E-02 Cs-134 <1.39E-02 0.00E+00 1.39E-02 Cs-137 <1.42E-02 0.00E+00 1.42E-02 Be-7 <1.08E-01 0.00E+00 1.08E-01 K-40 3.23E-01 1.67E-01 2.05E-01 Sample ID: 482796 Sample Dates: 8/20/2018 - 8/27/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.67E-02 0.00E+00 1.67E-02 Cs-134 <1.18E-02 0.00E+00 1.18E-02 Cs-137 <1.48E-02 0.00E+00 1.48E-02 Be-7 <9.89E-02 0.00E+00 9.89E-02 K-40 1.59E-01 1.43E-01 2.17E-01 Sample ID: 483421 Sample Dates: 8/27/2018 - 9/4/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.12E-02 0.00E+00 2.12E-02 Cs-134 <1.69E-02 0.00E+00 1.69E-02 Cs-137 <1.11E-02 0.00E+00 1.11E-02 Be-7 <9.08E-02 0.00E+00 9.08E-02 K-40 4.05E-01 1.57E-01 1.55E-01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 43 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 5 Sample Point 5 [ CONTROL - WNW @ 12 miles ]

Sample ID: 483996 Sample Dates: 9/4/2018 - 9/10/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.27E-02 0.00E+00 2.27E-02 Cs-134 <2.39E-02 0.00E+00 2.39E-02 Cs-137 <1.85E-02 0.00E+00 1.85E-02 Be-7 <1.54E-01 0.00E+00 1.54E-01 K-40 6.50E-01 2.59E-01 2.98E-01 Sample ID: 484166 Sample Dates: 9/10/2018 - 9/17/2018 Nuclide Activity 2 Sigma Error MDA I-131 <3.41E-02 0.00E+00 3.41E-02 Cs-134 <1.93E-02 0.00E+00 1.93E-02 Cs-137 <1.93E-02 0.00E+00 1.93E-02 Be-7 <1.17E-01 0.00E+00 1.17E-01 K-40 3.94E-01 1.75E-01 1.92E-01 Sample ID: 485017 Sample Dates: 9/17/2018 - 9/24/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.96E-02 0.00E+00 2.96E-02 Cs-134 <2.07E-02 0.00E+00 2.07E-02 Cs-137 <1.95E-02 0.00E+00 1.95E-02 Be-7 <1.08E-01 0.00E+00 1.08E-01 K-40 4.27E-01 1.86E-01 2.10E-01 Sample ID: 485247 Sample Dates: 9/24/2018 - 10/1/2018 Nuclide Activity 2 Sigma Error MDA I-131 <3.14E-02 0.00E+00 3.14E-02 Cs-134 <1.71E-02 0.00E+00 1.71E-02 Cs-137 <1.56E-02 0.00E+00 1.56E-02 Be-7 <1.14E-01 0.00E+00 1.14E-01 K-40 5.54E-01 1.73E-01 3.41E-02 Sample ID: 486141 Sample Dates: 10/1/2018 - 10/8/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.15E-02 0.00E+00 2.15E-02 Cs-134 <1.38E-02 0.00E+00 1.38E-02 Cs-137 <1.91E-02 0.00E+00 1.91E-02 Be-7 <1.29E-01 0.00E+00 1.29E-01 K-40 5.06E-01 1.83E-01 1.57E-01 Sample ID: 486687 Sample Dates: 10/8/2018 - 10/15/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.34E-02 0.00E+00 2.34E-02 Cs-134 <1.73E-02 0.00E+00 1.73E-02 Cs-137 <1.73E-02 0.00E+00 1.73E-02 Be-7 <1.35E-01 0.00E+00 1.35E-01 K-40 4.91E-01 1.70E-01 1.13E-01 Sample ID: 487726 Sample Dates: 10/15/2018 - 10/22/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.41E-02 0.00E+00 2.41E-02 Cs-134 <1.75E-02 0.00E+00 1.75E-02 Cs-137 <1.94E-02 0.00E+00 1.94E-02 Be-7 <1.32E-01 0.00E+00 1.32E-01 K-40 6.93E-01 2.23E-01 2.08E-01 Sample ID: 487973 Sample Dates: 10/22/2018 - 10/29/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.09E-02 0.00E+00 2.09E-02 Cs-134 <1.71E-02 0.00E+00 1.71E-02 Cs-137 <1.80E-02 0.00E+00 1.80E-02 Be-7 <1.08E-01 0.00E+00 1.08E-01 K-40 2.74E-01 1.76E-01 2.48E-01 Sample ID: 488458 Sample Dates: 10/29/2018 - 11/5/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.28E-02 0.00E+00 2.28E-02 Cs-134 <1.55E-02 0.00E+00 1.55E-02 Cs-137 <1.57E-02 0.00E+00 1.57E-02 Be-7 <9.92E-02 0.00E+00 9.92E-02 K-40 4.21E-01 2.08E-01 2.69E-01 Sample ID: 488834 Sample Dates: 11/5/2018 - 11/12/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.96E-02 0.00E+00 1.96E-02 Cs-134 <1.79E-02 0.00E+00 1.79E-02 Cs-137 <1.68E-02 0.00E+00 1.68E-02 Be-7 <1.26E-01 0.00E+00 1.26E-01 K-40 3.51E-01 1.90E-01 2.51E-01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 44 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 5 Sample Point 5 [ CONTROL - WNW @ 12 miles ]

Sample ID: 489138 Sample Dates: 11/12/2018 - 11/19/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.12E-02 0.00E+00 2.12E-02 Cs-134 <1.74E-02 0.00E+00 1.74E-02 Cs-137 <1.84E-02 0.00E+00 1.84E-02 Be-7 <1.27E-01 0.00E+00 1.27E-01 K-40 4.34E-01 1.72E-01 1.63E-01 Sample ID: 489723 Sample Dates: 11/19/2018 - 11/26/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.35E-02 0.00E+00 2.35E-02 Cs-134 <1.50E-02 0.00E+00 1.50E-02 Cs-137 <1.57E-02 0.00E+00 1.57E-02 Be-7 <1.12E-01 0.00E+00 1.12E-01 K-40 4.80E-01 1.60E-01 3.42E-02 Sample ID: 490139 Sample Dates: 11/26/2018 - 12/3/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.29E-02 0.00E+00 2.29E-02 Cs-134 <1.82E-02 0.00E+00 1.82E-02 Cs-137 <1.55E-02 0.00E+00 1.55E-02 Be-7 <1.31E-01 0.00E+00 1.31E-01 K-40 4.04E-01 1.93E-01 2.39E-01 Sample ID: 490785 Sample Dates: 12/3/2018 - 12/11/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.22E-02 0.00E+00 2.22E-02 Cs-134 <1.52E-02 0.00E+00 1.52E-02 Cs-137 <1.34E-02 0.00E+00 1.34E-02 Be-7 <1.07E-01 0.00E+00 1.07E-01 K-40 <3.68E-01 0.00E+00 3.68E-01 Sample ID: 491165 Sample Dates: 12/11/2018 - 12/18/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.44E-02 0.00E+00 1.44E-02 Cs-134 <1.16E-02 0.00E+00 1.16E-02 Cs-137 <1.68E-02 0.00E+00 1.68E-02 Be-7 <9.40E-02 0.00E+00 9.40E-02 K-40 <2.78E-01 0.00E+00 2.78E-01 Sample ID: 491469 Sample Dates: 12/18/2018 - 12/26/2018 Nuclide Activity 2 Sigma Error MDA I-131 <3.51E-02 0.00E+00 3.51E-02 Cs-134 <1.32E-02 0.00E+00 1.32E-02 Cs-137 <1.62E-02 0.00E+00 1.62E-02 Be-7 <9.53E-02 0.00E+00 9.53E-02 K-40 4.31E-01 1.62E-01 1.56E-01 Sample ID: 491734 Sample Dates: 12/26/2018 - 12/31/2018 Nuclide Activity 2 Sigma Error MDA I-131 <5.45E-02 0.00E+00 5.45E-02 Cs-134 <2.51E-02 0.00E+00 2.51E-02 Cs-137 <2.31E-02 0.00E+00 2.31E-02 Be-7 <1.88E-01 0.00E+00 1.88E-01 K-40 4.81E-01 2.57E-01 3.46E-01 Sample Point 26 [ INDICATOR - S @ 4.7 miles ]

Sample ID: 465975 Sample Dates: 1/2/2018 - 1/8/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.95E-02 0.00E+00 2.95E-02 Cs-134 <2.09E-02 0.00E+00 2.09E-02 Cs-137 <2.08E-02 0.00E+00 2.08E-02 Be-7 <1.53E-01 0.00E+00 1.53E-01 K-40 6.96E-01 2.26E-01 1.76E-01 Sample ID: 466175 Sample Dates: 1/8/2018 - 1/15/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.76E-02 0.00E+00 2.76E-02 Cs-134 <1.35E-02 0.00E+00 1.35E-02 Cs-137 <1.59E-02 0.00E+00 1.59E-02 Be-7 <1.23E-01 0.00E+00 1.23E-01 K-40 5.76E-01 2.11E-01 2.21E-01 Sample ID: 466373 Sample Dates: 1/15/2018 - 1/22/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.11E-02 0.00E+00 2.11E-02 Cs-134 <1.71E-02 0.00E+00 1.71E-02 Cs-137 <1.72E-02 0.00E+00 1.72E-02 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 45 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 26 Sample Point 26 [ INDICATOR - S @ 4.7 miles ]

Sample ID: 466373 Sample Dates: 1/15/2018 - 1/22/2018 Nuclide Activity 2 Sigma Error MDA Be-7 <1.21E-01 0.00E+00 1.21E-01 K-40 4.36E-01 1.82E-01 1.97E-01 Sample ID: 466961 Sample Dates: 1/22/2018 - 1/29/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.09E-02 0.00E+00 2.09E-02 Cs-134 <1.79E-02 0.00E+00 1.79E-02 Cs-137 <1.94E-02 0.00E+00 1.94E-02 Be-7 <1.04E-01 0.00E+00 1.04E-01 K-40 3.38E-01 2.01E-01 2.78E-01 Sample ID: 467320 Sample Dates: 1/29/2018 - 2/5/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.34E-02 0.00E+00 2.34E-02 Cs-134 <1.59E-02 0.00E+00 1.59E-02 Cs-137 <1.82E-02 0.00E+00 1.82E-02 Be-7 <1.13E-01 0.00E+00 1.13E-01 K-40 4.38E-01 2.08E-01 2.65E-01 Sample ID: 467629 Sample Dates: 2/5/2018 - 2/12/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.50E-02 0.00E+00 2.50E-02 Cs-134 <2.11E-02 0.00E+00 2.11E-02 Cs-137 <1.60E-02 0.00E+00 1.60E-02 Be-7 <1.26E-01 0.00E+00 1.26E-01 K-40 4.04E-01 1.73E-01 1.84E-01 Sample ID: 468421 Sample Dates: 2/12/2018 - 2/19/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.24E-02 0.00E+00 2.24E-02 Cs-134 <1.64E-02 0.00E+00 1.64E-02 Cs-137 <1.62E-02 0.00E+00 1.62E-02 Be-7 <1.10E-01 0.00E+00 1.10E-01 K-40 6.01E-01 1.96E-01 1.60E-01 Sample ID: 468742 Sample Dates: 2/19/2018 - 2/26/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.83E-02 0.00E+00 1.83E-02 Cs-134 <1.17E-02 0.00E+00 1.17E-02 Cs-137 <1.62E-02 0.00E+00 1.62E-02 Be-7 <1.20E-01 0.00E+00 1.20E-01 K-40 6.43E-01 1.98E-01 1.28E-01 Sample ID: 469554 Sample Dates: 2/26/2018 - 3/5/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.75E-02 0.00E+00 2.75E-02 Cs-134 <1.91E-02 0.00E+00 1.91E-02 Cs-137 <1.58E-02 0.00E+00 1.58E-02 Be-7 <1.32E-01 0.00E+00 1.32E-01 K-40 5.02E-01 1.92E-01 1.91E-01 Sample ID: 470576 Sample Dates: 3/5/2018 - 3/12/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.04E-02 0.00E+00 2.04E-02 Cs-134 <1.77E-02 0.00E+00 1.77E-02 Cs-137 <1.68E-02 0.00E+00 1.68E-02 Be-7 <1.21E-01 0.00E+00 1.21E-01 K-40 6.81E-01 1.96E-01 3.55E-02 Sample ID: 471143 Sample Dates: 3/12/2018 - 3/19/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.27E-02 0.00E+00 2.27E-02 Cs-134 <1.71E-02 0.00E+00 1.71E-02 Cs-137 <1.57E-02 0.00E+00 1.57E-02 Be-7 <1.22E-01 0.00E+00 1.22E-01 K-40 5.75E-01 2.25E-01 2.65E-01 Sample ID: 471698 Sample Dates: 3/19/2018 - 3/26/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.19E-02 0.00E+00 2.19E-02 Cs-134 <1.38E-02 0.00E+00 1.38E-02 Cs-137 <1.57E-02 0.00E+00 1.57E-02 Be-7 <1.29E-01 0.00E+00 1.29E-01 K-40 5.70E-01 2.04E-01 2.00E-01 Sample ID: 472485 Sample Dates: 3/26/2018 - 4/2/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.23E-02 0.00E+00 2.23E-02 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 46 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 26 Sample Point 26 [ INDICATOR - S @ 4.7 miles ]

Sample ID: 472485 Sample Dates: 3/26/2018 - 4/2/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.59E-02 0.00E+00 1.59E-02 Cs-137 <1.58E-02 0.00E+00 1.58E-02 Be-7 <1.35E-01 0.00E+00 1.35E-01 K-40 5.36E-01 1.71E-01 3.46E-02 Sample ID: 472960 Sample Dates: 4/2/2018 - 4/9/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.15E-02 0.00E+00 2.15E-02 Cs-134 <1.61E-02 0.00E+00 1.61E-02 Cs-137 <1.80E-02 0.00E+00 1.80E-02 Be-7 <1.37E-01 0.00E+00 1.37E-01 K-40 4.47E-01 2.06E-01 2.56E-01 Sample ID: 473251 Sample Dates: 4/9/2018 - 4/16/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.40E-02 0.00E+00 2.40E-02 Cs-134 <1.83E-02 0.00E+00 1.83E-02 Cs-137 <1.80E-02 0.00E+00 1.80E-02 Be-7 <1.30E-01 0.00E+00 1.30E-01 K-40 4.45E-01 2.04E-01 2.54E-01 Sample ID: 473616 Sample Dates: 4/16/2018 - 4/23/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.04E-02 0.00E+00 2.04E-02 Cs-134 <1.46E-02 0.00E+00 1.46E-02 Cs-137 <1.56E-02 0.00E+00 1.56E-02 Be-7 <1.18E-01 0.00E+00 1.18E-01 K-40 3.36E-01 1.82E-01 2.36E-01 Sample ID: 474136 Sample Dates: 4/23/2018 - 4/30/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.44E-02 0.00E+00 2.44E-02 Cs-134 <1.73E-02 0.00E+00 1.73E-02 Cs-137 <1.95E-02 0.00E+00 1.95E-02 Be-7 <1.46E-01 0.00E+00 1.46E-01 K-40 4.29E-01 1.79E-01 1.90E-01 Sample ID: 474514 Sample Dates: 4/30/2018 - 5/7/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.27E-02 0.00E+00 2.27E-02 Cs-134 <1.42E-02 0.00E+00 1.42E-02 Cs-137 <1.67E-02 0.00E+00 1.67E-02 Be-7 <1.14E-01 0.00E+00 1.14E-01 K-40 6.33E-01 2.05E-01 1.77E-01 Sample ID: 474873 Sample Dates: 5/7/2018 - 5/14/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.32E-02 0.00E+00 2.32E-02 Cs-134 <1.73E-02 0.00E+00 1.73E-02 Cs-137 <2.04E-02 0.00E+00 2.04E-02 Be-7 <1.41E-01 0.00E+00 1.41E-01 K-40 4.26E-01 2.00E-01 2.50E-01 Sample ID: 475197 Sample Dates: 5/14/2018 - 5/21/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.08E-02 0.00E+00 2.08E-02 Cs-134 <1.77E-02 0.00E+00 1.77E-02 Cs-137 <1.62E-02 0.00E+00 1.62E-02 Be-7 <1.40E-01 0.00E+00 1.40E-01 K-40 4.49E-01 1.79E-01 1.74E-01 Sample ID: 475522 Sample Dates: 5/21/2018 - 5/29/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.94E-02 0.00E+00 1.94E-02 Cs-134 <1.57E-02 0.00E+00 1.57E-02 Cs-137 <1.47E-02 0.00E+00 1.47E-02 Be-7 <1.38E-01 0.00E+00 1.38E-01 K-40 3.01E-01 1.46E-01 1.72E-01 Sample ID: 476347 Sample Dates: 5/29/2018 - 6/4/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.44E-02 0.00E+00 2.44E-02 Cs-134 <1.69E-02 0.00E+00 1.69E-02 Cs-137 <2.40E-02 0.00E+00 2.40E-02 Be-7 <1.18E-01 0.00E+00 1.18E-01 K-40 5.63E-01 2.37E-01 2.83E-01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 47 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 26 Sample Point 26 [ INDICATOR - S @ 4.7 miles ]

Sample ID: 477359 Sample Dates: 6/4/2018 - 6/11/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.12E-02 0.00E+00 2.12E-02 Cs-134 <1.65E-02 0.00E+00 1.65E-02 Cs-137 <1.80E-02 0.00E+00 1.80E-02 Be-7 <1.19E-01 0.00E+00 1.19E-01 K-40 4.49E-01 1.72E-01 1.48E-01 Sample ID: 478089 Sample Dates: 6/11/2018 - 6/18/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.33E-02 0.00E+00 2.33E-02 Cs-134 <1.90E-02 0.00E+00 1.90E-02 Cs-137 <1.51E-02 0.00E+00 1.51E-02 Be-7 <1.20E-01 0.00E+00 1.20E-01 K-40 5.65E-01 1.87E-01 1.32E-01 Sample ID: 478409 Sample Dates: 6/18/2018 - 6/25/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.51E-02 0.00E+00 2.51E-02 Cs-134 <1.98E-02 0.00E+00 1.98E-02 Cs-137 <1.47E-02 0.00E+00 1.47E-02 Be-7 <1.45E-01 0.00E+00 1.45E-01 K-40 <3.32E-01 0.00E+00 3.32E-01 Sample ID: 478769 Sample Dates: 6/25/2018 - 7/2/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.22E-02 0.00E+00 2.22E-02 Cs-134 <1.92E-02 0.00E+00 1.92E-02 Cs-137 <1.64E-02 0.00E+00 1.64E-02 Be-7 <1.29E-01 0.00E+00 1.29E-01 K-40 5.62E-01 1.75E-01 3.46E-02 Sample ID: 479041 Sample Dates: 7/2/2018 - 7/9/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.02E-02 0.00E+00 2.02E-02 Cs-134 <2.07E-02 0.00E+00 2.07E-02 Cs-137 <1.86E-02 0.00E+00 1.86E-02 Be-7 <1.17E-01 0.00E+00 1.17E-01 K-40 4.12E-01 2.12E-01 2.84E-01 Sample ID: 479862 Sample Dates: 7/9/2018 - 7/16/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.12E-02 0.00E+00 2.12E-02 Cs-134 <1.62E-02 0.00E+00 1.62E-02 Cs-137 <1.91E-02 0.00E+00 1.91E-02 Be-7 <1.13E-01 0.00E+00 1.13E-01 K-40 4.57E-01 1.88E-01 2.01E-01 Sample ID: 480232 Sample Dates: 7/16/2018 - 7/23/2018 Nuclide Activity 2 Sigma Error MDA I-131 <3.05E-02 0.00E+00 3.05E-02 Cs-134 <2.46E-02 0.00E+00 2.46E-02 Cs-137 <2.22E-02 0.00E+00 2.22E-02 Be-7 <1.43E-01 0.00E+00 1.43E-01 K-40 5.51E-01 2.22E-01 2.21E-01 Sample ID: 481059 Sample Dates: 7/23/2018 - 7/30/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.64E-02 0.00E+00 2.64E-02 Cs-134 <1.72E-02 0.00E+00 1.72E-02 Cs-137 <1.47E-02 0.00E+00 1.47E-02 Be-7 <1.34E-01 0.00E+00 1.34E-01 K-40 <4.01E-01 0.00E+00 4.01E-01 Sample ID: 481503 Sample Dates: 7/30/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.17E-02 0.00E+00 2.17E-02 Cs-134 <1.41E-02 0.00E+00 1.41E-02 Cs-137 <1.45E-02 0.00E+00 1.45E-02 Be-7 <1.09E-01 0.00E+00 1.09E-01 K-40 5.18E-01 1.74E-01 1.21E-01 Sample ID: 481936 Sample Dates: 8/6/2018 - 8/13/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.22E-02 0.00E+00 2.22E-02 Cs-134 <1.56E-02 0.00E+00 1.56E-02 Cs-137 <1.78E-02 0.00E+00 1.78E-02 Be-7 <1.11E-01 0.00E+00 1.11E-01 K-40 5.46E-01 1.94E-01 1.73E-01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 48 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 26 Sample Point 26 [ INDICATOR - S @ 4.7 miles ]

Sample ID: 482468 Sample Dates: 8/13/2018 - 8/20/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.79E-02 0.00E+00 1.79E-02 Cs-134 <1.75E-02 0.00E+00 1.75E-02 Cs-137 <1.67E-02 0.00E+00 1.67E-02 Be-7 <9.27E-02 0.00E+00 9.27E-02 K-40 4.96E-01 1.62E-01 3.36E-02 Sample ID: 482793 Sample Dates: 8/20/2018 - 8/27/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.75E-02 0.00E+00 1.75E-02 Cs-134 <1.29E-02 0.00E+00 1.29E-02 Cs-137 <1.25E-02 0.00E+00 1.25E-02 Be-7 <7.94E-02 0.00E+00 7.94E-02 K-40 3.96E-01 1.49E-01 1.14E-01 Sample ID: 483418 Sample Dates: 8/27/2018 - 9/4/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.92E-02 0.00E+00 1.92E-02 Cs-134 <1.37E-02 0.00E+00 1.37E-02 Cs-137 <1.46E-02 0.00E+00 1.46E-02 Be-7 <1.08E-01 0.00E+00 1.08E-01 K-40 3.53E-01 1.55E-01 1.74E-01 Sample ID: 483993 Sample Dates: 9/4/2018 - 9/10/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.31E-02 0.00E+00 2.31E-02 Cs-134 <2.20E-02 0.00E+00 2.20E-02 Cs-137 <2.11E-02 0.00E+00 2.11E-02 Be-7 <1.34E-01 0.00E+00 1.34E-01 K-40 4.61E-01 2.02E-01 2.19E-01 Sample ID: 484163 Sample Dates: 9/10/2018 - 9/17/2018 Nuclide Activity 2 Sigma Error MDA I-131 <4.88E-02 0.00E+00 4.88E-02 Cs-134 <1.88E-02 0.00E+00 1.88E-02 Cs-137 <2.60E-02 0.00E+00 2.60E-02 Be-7 <1.70E-01 0.00E+00 1.70E-01 K-40 6.38E-01 2.53E-01 2.71E-01 Sample ID: 485014 Sample Dates: 9/17/2018 - 9/24/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.51E-02 0.00E+00 2.51E-02 Cs-134 <1.69E-02 0.00E+00 1.69E-02 Cs-137 <1.55E-02 0.00E+00 1.55E-02 Be-7 <1.11E-01 0.00E+00 1.11E-01 K-40 4.80E-01 1.86E-01 1.84E-01 Sample ID: 485244 Sample Dates: 9/24/2018 - 10/1/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.99E-02 0.00E+00 2.99E-02 Cs-134 <1.48E-02 0.00E+00 1.48E-02 Cs-137 <1.83E-02 0.00E+00 1.83E-02 Be-7 <1.06E-01 0.00E+00 1.06E-01 K-40 5.91E-01 2.13E-01 2.25E-01 Sample ID: 486138 Sample Dates: 10/1/2018 - 10/8/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.97E-02 0.00E+00 1.97E-02 Cs-134 <2.06E-02 0.00E+00 2.06E-02 Cs-137 <1.44E-02 0.00E+00 1.44E-02 Be-7 <1.38E-01 0.00E+00 1.38E-01 K-40 3.11E-01 1.83E-01 2.48E-01 Sample ID: 486684 Sample Dates: 10/8/2018 - 10/11/2018 Nuclide Activity 2 Sigma Error MDA I-131 <5.40E-02 0.00E+00 5.40E-02 Cs-134 <2.77E-02 0.00E+00 2.77E-02 Cs-137 <2.77E-02 0.00E+00 2.77E-02 Be-7 <1.99E-01 0.00E+00 1.99E-01 K-40 1.02E+00 3.18E-01 3.00E-01 Sample ID: 487723 Sample Dates: 10/15/2018 - 10/22/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.16E-02 0.00E+00 2.16E-02 Cs-134 <1.44E-02 0.00E+00 1.44E-02 Cs-137 <1.48E-02 0.00E+00 1.48E-02 Be-7 <1.22E-01 0.00E+00 1.22E-01 K-40 5.10E-01 1.91E-01 1.89E-01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 49 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 26 Sample Point 26 [ INDICATOR - S @ 4.7 miles ]

Sample ID: 487970 Sample Dates: 10/22/2018 - 10/29/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.09E-02 0.00E+00 2.09E-02 Cs-134 <1.69E-02 0.00E+00 1.69E-02 Cs-137 <1.76E-02 0.00E+00 1.76E-02 Be-7 <1.01E-01 0.00E+00 1.01E-01 K-40 4.41E-01 2.07E-01 2.63E-01 Sample ID: 488455 Sample Dates: 10/29/2018 - 11/5/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.21E-02 0.00E+00 2.21E-02 Cs-134 <1.70E-02 0.00E+00 1.70E-02 Cs-137 <1.87E-02 0.00E+00 1.87E-02 Be-7 <1.29E-01 0.00E+00 1.29E-01 K-40 4.62E-01 1.97E-01 2.27E-01 Sample ID: 488831 Sample Dates: 11/5/2018 - 11/12/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.05E-02 0.00E+00 2.05E-02 Cs-134 <1.59E-02 0.00E+00 1.59E-02 Cs-137 <1.78E-02 0.00E+00 1.78E-02 Be-7 <1.18E-01 0.00E+00 1.18E-01 K-40 5.24E-01 1.91E-01 1.81E-01 Sample ID: 489135 Sample Dates: 11/12/2018 - 11/19/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.08E-02 0.00E+00 2.08E-02 Cs-134 <1.44E-02 0.00E+00 1.44E-02 Cs-137 <1.84E-02 0.00E+00 1.84E-02 Be-7 <1.24E-01 0.00E+00 1.24E-01 K-40 4.34E-01 1.69E-01 1.50E-01 Sample ID: 489720 Sample Dates: 11/19/2018 - 11/26/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.45E-02 0.00E+00 2.45E-02 Cs-134 <1.49E-02 0.00E+00 1.49E-02 Cs-137 <1.80E-02 0.00E+00 1.80E-02 Be-7 <1.26E-01 0.00E+00 1.26E-01 K-40 3.69E-01 1.75E-01 2.09E-01 Sample ID: 490136 Sample Dates: 11/26/2018 - 12/3/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.40E-02 0.00E+00 2.40E-02 Cs-134 <1.46E-02 0.00E+00 1.46E-02 Cs-137 <1.67E-02 0.00E+00 1.67E-02 Be-7 <1.10E-01 0.00E+00 1.10E-01 K-40 6.26E-01 1.87E-01 3.53E-02 Sample ID: 490782 Sample Dates: 12/3/2018 - 12/11/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.09E-02 0.00E+00 2.09E-02 Cs-134 <1.52E-02 0.00E+00 1.52E-02 Cs-137 <1.60E-02 0.00E+00 1.60E-02 Be-7 <1.05E-01 0.00E+00 1.05E-01 K-40 5.99E-01 1.83E-01 1.40E-01 Sample ID: 491162 Sample Dates: 12/11/2018 - 12/18/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.84E-02 0.00E+00 1.84E-02 Cs-134 <1.42E-02 0.00E+00 1.42E-02 Cs-137 <1.69E-02 0.00E+00 1.69E-02 Be-7 <9.16E-02 0.00E+00 9.16E-02 K-40 3.74E-01 1.66E-01 1.85E-01 Sample ID: 491466 Sample Dates: 12/18/2018 - 12/26/2018 Nuclide Activity 2 Sigma Error MDA I-131 <3.55E-02 0.00E+00 3.55E-02 Cs-134 <1.50E-02 0.00E+00 1.50E-02 Cs-137 <1.65E-02 0.00E+00 1.65E-02 Be-7 <1.16E-01 0.00E+00 1.16E-01 K-40 4.83E-01 1.71E-01 1.63E-01 Sample ID: 491731 Sample Dates: 12/26/2018 - 12/31/2018 Nuclide Activity 2 Sigma Error MDA I-131 <5.20E-02 0.00E+00 5.20E-02 Cs-134 <2.51E-02 0.00E+00 2.51E-02 Cs-137 <2.94E-02 0.00E+00 2.94E-02 Be-7 <1.94E-01 0.00E+00 1.94E-01 K-40 7.03E-01 2.67E-01 2.60E-01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 50 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 47 Sample Point 47 [ INDICATOR - SSW @ 3.4 miles ]

Sample ID: 465977 Sample Dates: 1/2/2018 - 1/8/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.54E-02 0.00E+00 2.54E-02 Cs-134 <2.56E-02 0.00E+00 2.56E-02 Cs-137 <2.08E-02 0.00E+00 2.08E-02 Be-7 <1.56E-01 0.00E+00 1.56E-01 K-40 7.30E-01 2.40E-01 2.11E-01 Sample ID: 466177 Sample Dates: 1/8/2018 - 1/15/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.48E-02 0.00E+00 2.48E-02 Cs-134 <1.52E-02 0.00E+00 1.52E-02 Cs-137 <1.84E-02 0.00E+00 1.84E-02 Be-7 <1.38E-01 0.00E+00 1.38E-01 K-40 5.09E-01 2.02E-01 2.24E-01 Sample ID: 466375 Sample Dates: 1/15/2018 - 1/22/2018 Nuclide Activity 2 Sigma Error MDA I-131 <4.48E-02 0.00E+00 4.48E-02 Cs-134 <9.87E-03 0.00E+00 9.87E-03 Cs-137 <1.04E-02 0.00E+00 1.04E-02 Be-7 <1.01E-01 0.00E+00 1.01E-01 K-40 2.30E-01 1.27E-01 1.78E-01 Sample ID: 466963 Sample Dates: 1/22/2018 - 1/29/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.31E-02 0.00E+00 2.31E-02 Cs-134 <1.86E-02 0.00E+00 1.86E-02 Cs-137 <1.64E-02 0.00E+00 1.64E-02 Be-7 <1.27E-01 0.00E+00 1.27E-01 K-40 5.92E-01 2.26E-01 2.54E-01 Sample ID: 467322 Sample Dates: 1/29/2018 - 2/5/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.31E-02 0.00E+00 2.31E-02 Cs-134 <1.97E-02 0.00E+00 1.97E-02 Cs-137 <1.73E-02 0.00E+00 1.73E-02 Be-7 <1.19E-01 0.00E+00 1.19E-01 K-40 4.97E-01 1.64E-01 3.45E-02 Sample ID: 467631 Sample Dates: 2/5/2018 - 2/12/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.26E-02 0.00E+00 2.26E-02 Cs-134 <1.99E-02 0.00E+00 1.99E-02 Cs-137 <1.60E-02 0.00E+00 1.60E-02 Be-7 <9.11E-02 0.00E+00 9.11E-02 K-40 3.24E-01 1.84E-01 2.47E-01 Sample ID: 468423 Sample Dates: 2/12/2018 - 2/19/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.32E-02 0.00E+00 2.32E-02 Cs-134 <1.21E-02 0.00E+00 1.21E-02 Cs-137 <1.75E-02 0.00E+00 1.75E-02 Be-7 <1.34E-01 0.00E+00 1.34E-01 K-40 7.29E-01 2.12E-01 1.49E-01 Sample ID: 468744 Sample Dates: 2/19/2018 - 2/26/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.35E-02 0.00E+00 2.35E-02 Cs-134 <1.83E-02 0.00E+00 1.83E-02 Cs-137 <2.12E-02 0.00E+00 2.12E-02 Be-7 <1.26E-01 0.00E+00 1.26E-01 K-40 5.26E-01 2.09E-01 2.35E-01 Sample ID: 469556 Sample Dates: 2/26/2018 - 3/5/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.49E-02 0.00E+00 2.49E-02 Cs-134 <1.62E-02 0.00E+00 1.62E-02 Cs-137 <1.72E-02 0.00E+00 1.72E-02 Be-7 <1.12E-01 0.00E+00 1.12E-01 K-40 4.88E-01 1.94E-01 2.04E-01 Sample ID: 470578 Sample Dates: 3/5/2018 - 3/12/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.19E-02 0.00E+00 2.19E-02 Cs-134 <1.79E-02 0.00E+00 1.79E-02 Cs-137 <1.52E-02 0.00E+00 1.52E-02 Be-7 <1.45E-01 0.00E+00 1.45E-01 K-40 4.64E-01 1.72E-01 1.37E-01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 51 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 47 Sample Point 47 [ INDICATOR - SSW @ 3.4 miles ]

Sample ID: 471145 Sample Dates: 3/12/2018 - 3/19/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.67E-02 0.00E+00 2.67E-02 Cs-134 <1.84E-02 0.00E+00 1.84E-02 Cs-137 <1.67E-02 0.00E+00 1.67E-02 Be-7 <1.19E-01 0.00E+00 1.19E-01 K-40 5.73E-01 2.20E-01 2.52E-01 Sample ID: 471700 Sample Dates: 3/19/2018 - 3/26/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.87E-02 0.00E+00 2.87E-02 Cs-134 <1.55E-02 0.00E+00 1.55E-02 Cs-137 <1.77E-02 0.00E+00 1.77E-02 Be-7 <1.14E-01 0.00E+00 1.14E-01 K-40 4.71E-01 1.73E-01 1.40E-01 Sample ID: 472487 Sample Dates: 3/26/2018 - 4/2/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.59E-02 0.00E+00 2.59E-02 Cs-134 <1.59E-02 0.00E+00 1.59E-02 Cs-137 <1.91E-02 0.00E+00 1.91E-02 Be-7 <1.05E-01 0.00E+00 1.05E-01 K-40 3.51E-01 1.75E-01 2.16E-01 Sample ID: 472962 Sample Dates: 4/2/2018 - 4/9/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.96E-02 0.00E+00 1.96E-02 Cs-134 <1.88E-02 0.00E+00 1.88E-02 Cs-137 <1.66E-02 0.00E+00 1.66E-02 Be-7 <1.16E-01 0.00E+00 1.16E-01 K-40 3.97E-01 1.93E-01 2.41E-01 Sample ID: 473253 Sample Dates: 4/9/2018 - 4/16/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.26E-02 0.00E+00 2.26E-02 Cs-134 <1.89E-02 0.00E+00 1.89E-02 Cs-137 <2.01E-02 0.00E+00 2.01E-02 Be-7 <1.30E-01 0.00E+00 1.30E-01 K-40 4.37E-01 1.70E-01 1.59E-01 Sample ID: 473618 Sample Dates: 4/16/2018 - 4/23/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.40E-02 0.00E+00 2.40E-02 Cs-134 <1.77E-02 0.00E+00 1.77E-02 Cs-137 <2.12E-02 0.00E+00 2.12E-02 Be-7 <1.08E-01 0.00E+00 1.08E-01 K-40 5.70E-01 2.13E-01 2.26E-01 Sample ID: 474138 Sample Dates: 4/23/2018 - 4/30/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.38E-02 0.00E+00 2.38E-02 Cs-134 <2.03E-02 0.00E+00 2.03E-02 Cs-137 <1.82E-02 0.00E+00 1.82E-02 Be-7 <1.25E-01 0.00E+00 1.25E-01 K-40 6.38E-01 1.87E-01 3.46E-02 Sample ID: 474516 Sample Dates: 4/30/2018 - 5/7/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.02E-02 0.00E+00 2.02E-02 Cs-134 <1.95E-02 0.00E+00 1.95E-02 Cs-137 <1.57E-02 0.00E+00 1.57E-02 Be-7 <1.20E-01 0.00E+00 1.20E-01 K-40 <4.29E-01 0.00E+00 4.29E-01 Sample ID: 474875 Sample Dates: 5/7/2018 - 5/14/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.09E-02 0.00E+00 2.09E-02 Cs-134 <1.92E-02 0.00E+00 1.92E-02 Cs-137 <1.96E-02 0.00E+00 1.96E-02 Be-7 <1.13E-01 0.00E+00 1.13E-01 K-40 3.59E-01 1.87E-01 2.42E-01 Sample ID: 475199 Sample Dates: 5/14/2018 - 5/21/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.23E-02 0.00E+00 2.23E-02 Cs-134 <1.70E-02 0.00E+00 1.70E-02 Cs-137 <1.57E-02 0.00E+00 1.57E-02 Be-7 <1.26E-01 0.00E+00 1.26E-01 K-40 3.99E-01 2.23E-01 3.10E-01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 52 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 47 Sample Point 47 [ INDICATOR - SSW @ 3.4 miles ]

Sample ID: 475524 Sample Dates: 5/21/2018 - 5/29/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.60E-02 0.00E+00 1.60E-02 Cs-134 <1.39E-02 0.00E+00 1.39E-02 Cs-137 <1.24E-02 0.00E+00 1.24E-02 Be-7 <1.21E-01 0.00E+00 1.21E-01 K-40 3.70E-01 1.42E-01 1.16E-01 Sample ID: 476349 Sample Dates: 5/29/2018 - 6/4/2018 Nuclide Activity 2 Sigma Error MDA I-131 <3.28E-02 0.00E+00 3.28E-02 Cs-134 <1.78E-02 0.00E+00 1.78E-02 Cs-137 <1.83E-02 0.00E+00 1.83E-02 Be-7 <1.26E-01 0.00E+00 1.26E-01 K-40 6.57E-01 2.01E-01 3.87E-02 Sample ID: 477361 Sample Dates: 6/4/2018 - 6/11/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.04E-02 0.00E+00 2.04E-02 Cs-134 <1.89E-02 0.00E+00 1.89E-02 Cs-137 <1.66E-02 0.00E+00 1.66E-02 Be-7 <1.13E-01 0.00E+00 1.13E-01 K-40 <3.88E-01 0.00E+00 3.88E-01 Sample ID: 478091 Sample Dates: 6/11/2018 - 6/18/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.76E-02 0.00E+00 2.76E-02 Cs-134 <1.73E-02 0.00E+00 1.73E-02 Cs-137 <1.70E-02 0.00E+00 1.70E-02 Be-7 <1.15E-01 0.00E+00 1.15E-01 K-40 5.53E-01 2.04E-01 2.03E-01 Sample ID: 478411 Sample Dates: 6/18/2018 - 6/25/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.39E-02 0.00E+00 2.39E-02 Cs-134 <1.43E-02 0.00E+00 1.43E-02 Cs-137 <1.58E-02 0.00E+00 1.58E-02 Be-7 <1.10E-01 0.00E+00 1.10E-01 K-40 3.00E-01 1.65E-01 2.11E-01 Sample ID: 478771 Sample Dates: 6/25/2018 - 7/2/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.23E-02 0.00E+00 2.23E-02 Cs-134 <1.80E-02 0.00E+00 1.80E-02 Cs-137 <1.53E-02 0.00E+00 1.53E-02 Be-7 <1.37E-01 0.00E+00 1.37E-01 K-40 4.95E-01 1.94E-01 2.06E-01 Sample ID: 479043 Sample Dates: 7/2/2018 - 7/9/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.14E-02 0.00E+00 2.14E-02 Cs-134 <1.65E-02 0.00E+00 1.65E-02 Cs-137 <1.73E-02 0.00E+00 1.73E-02 Be-7 <1.25E-01 0.00E+00 1.25E-01 K-40 5.05E-01 1.80E-01 1.51E-01 Sample ID: 479864 Sample Dates: 7/9/2018 - 7/16/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.27E-02 0.00E+00 2.27E-02 Cs-134 <1.17E-02 0.00E+00 1.17E-02 Cs-137 <1.62E-02 0.00E+00 1.62E-02 Be-7 <1.25E-01 0.00E+00 1.25E-01 K-40 4.71E-01 1.95E-01 2.16E-01 Sample ID: 480234 Sample Dates: 7/16/2018 - 7/23/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.18E-02 0.00E+00 2.18E-02 Cs-134 <1.98E-02 0.00E+00 1.98E-02 Cs-137 <1.69E-02 0.00E+00 1.69E-02 Be-7 <1.24E-01 0.00E+00 1.24E-01 K-40 5.81E-01 1.94E-01 1.61E-01 Sample ID: 481061 Sample Dates: 7/23/2018 - 7/30/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.37E-02 0.00E+00 2.37E-02 Cs-134 <1.53E-02 0.00E+00 1.53E-02 Cs-137 <1.37E-02 0.00E+00 1.37E-02 Be-7 <1.11E-01 0.00E+00 1.11E-01 K-40 2.59E-01 1.95E-01 2.92E-01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 53 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 47 Sample Point 47 [ INDICATOR - SSW @ 3.4 miles ]

Sample ID: 481505 Sample Dates: 7/30/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.28E-02 0.00E+00 2.28E-02 Cs-134 <1.56E-02 0.00E+00 1.56E-02 Cs-137 <1.83E-02 0.00E+00 1.83E-02 Be-7 <1.24E-01 0.00E+00 1.24E-01 K-40 4.88E-01 1.94E-01 2.11E-01 Sample ID: 481938 Sample Dates: 8/6/2018 - 8/13/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.16E-02 0.00E+00 2.16E-02 Cs-134 <2.20E-02 0.00E+00 2.20E-02 Cs-137 <1.73E-02 0.00E+00 1.73E-02 Be-7 <1.21E-01 0.00E+00 1.21E-01 K-40 4.70E-01 2.40E-01 3.27E-01 Sample ID: 482470 Sample Dates: 8/13/2018 - 8/20/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.67E-02 0.00E+00 2.67E-02 Cs-134 <1.48E-02 0.00E+00 1.48E-02 Cs-137 <1.67E-02 0.00E+00 1.67E-02 Be-7 <1.25E-01 0.00E+00 1.25E-01 K-40 2.79E-01 1.31E-01 1.25E-01 Sample ID: 482795 Sample Dates: 8/20/2018 - 8/27/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.42E-02 0.00E+00 1.42E-02 Cs-134 <1.15E-02 0.00E+00 1.15E-02 Cs-137 <1.38E-02 0.00E+00 1.38E-02 Be-7 <8.35E-02 0.00E+00 8.35E-02 K-40 <2.77E-01 0.00E+00 2.77E-01 Sample ID: 483420 Sample Dates: 8/27/2018 - 9/4/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.10E-02 0.00E+00 2.10E-02 Cs-134 <1.55E-02 0.00E+00 1.55E-02 Cs-137 <1.50E-02 0.00E+00 1.50E-02 Be-7 <9.18E-02 0.00E+00 9.18E-02 K-40 3.06E-01 1.46E-01 1.70E-01 Sample ID: 483995 Sample Dates: 9/4/2018 - 9/10/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.28E-02 0.00E+00 2.28E-02 Cs-134 <2.27E-02 0.00E+00 2.27E-02 Cs-137 <1.87E-02 0.00E+00 1.87E-02 Be-7 <1.48E-01 0.00E+00 1.48E-01 K-40 5.29E-01 2.12E-01 2.14E-01 Sample ID: 484165 Sample Dates: 9/10/2018 - 9/17/2018 Nuclide Activity 2 Sigma Error MDA I-131 <3.54E-02 0.00E+00 3.54E-02 Cs-134 <1.93E-02 0.00E+00 1.93E-02 Cs-137 <2.04E-02 0.00E+00 2.04E-02 Be-7 <1.13E-01 0.00E+00 1.13E-01 K-40 <3.61E-01 0.00E+00 3.61E-01 Sample ID: 485016 Sample Dates: 9/17/2018 - 9/24/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.52E-02 0.00E+00 2.52E-02 Cs-134 <2.00E-02 0.00E+00 2.00E-02 Cs-137 <1.98E-02 0.00E+00 1.98E-02 Be-7 <1.17E-01 0.00E+00 1.17E-01 K-40 5.13E-01 2.16E-01 2.59E-01 Sample ID: 485246 Sample Dates: 9/24/2018 - 10/1/2018 Nuclide Activity 2 Sigma Error MDA I-131 <3.25E-02 0.00E+00 3.25E-02 Cs-134 <2.00E-02 0.00E+00 2.00E-02 Cs-137 <1.60E-02 0.00E+00 1.60E-02 Be-7 <1.30E-01 0.00E+00 1.30E-01 K-40 2.50E-01 1.89E-01 2.83E-01 Sample ID: 486140 Sample Dates: 10/1/2018 - 10/8/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.23E-02 0.00E+00 2.23E-02 Cs-134 <1.61E-02 0.00E+00 1.61E-02 Cs-137 <1.76E-02 0.00E+00 1.76E-02 Be-7 <1.31E-01 0.00E+00 1.31E-01 K-40 3.77E-01 1.82E-01 2.20E-01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 54 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 47 Sample Point 47 [ INDICATOR - SSW @ 3.4 miles ]

Sample ID: 486686 Sample Dates: 10/8/2018 - 10/15/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.65E-02 0.00E+00 2.65E-02 Cs-134 <1.54E-02 0.00E+00 1.54E-02 Cs-137 <1.61E-02 0.00E+00 1.61E-02 Be-7 <1.28E-01 0.00E+00 1.28E-01 K-40 5.84E-01 1.91E-01 1.38E-01 Sample ID: 487725 Sample Dates: 10/15/2018 - 10/22/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.85E-02 0.00E+00 1.85E-02 Cs-134 <2.05E-02 0.00E+00 2.05E-02 Cs-137 <1.54E-02 0.00E+00 1.54E-02 Be-7 <1.20E-01 0.00E+00 1.20E-01 K-40 5.95E-01 1.99E-01 1.70E-01 Sample ID: 487972 Sample Dates: 10/22/2018 - 10/29/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.58E-02 0.00E+00 2.58E-02 Cs-134 <1.90E-02 0.00E+00 1.90E-02 Cs-137 <1.71E-02 0.00E+00 1.71E-02 Be-7 <1.14E-01 0.00E+00 1.14E-01 K-40 <4.20E-01 0.00E+00 4.20E-01 Sample ID: 488457 Sample Dates: 10/29/2018 - 11/5/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.35E-02 0.00E+00 2.35E-02 Cs-134 <1.96E-02 0.00E+00 1.96E-02 Cs-137 <1.51E-02 0.00E+00 1.51E-02 Be-7 <1.03E-01 0.00E+00 1.03E-01 K-40 4.05E-01 1.63E-01 1.42E-01 Sample ID: 488833 Sample Dates: 11/5/2018 - 11/12/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.33E-02 0.00E+00 2.33E-02 Cs-134 <1.59E-02 0.00E+00 1.59E-02 Cs-137 <1.64E-02 0.00E+00 1.64E-02 Be-7 <1.18E-01 0.00E+00 1.18E-01 K-40 <3.44E-01 0.00E+00 3.44E-01 Sample ID: 489137 Sample Dates: 11/12/2018 - 11/19/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.91E-02 0.00E+00 1.91E-02 Cs-134 <1.60E-02 0.00E+00 1.60E-02 Cs-137 <1.88E-02 0.00E+00 1.88E-02 Be-7 <1.30E-01 0.00E+00 1.30E-01 K-40 3.06E-01 1.74E-01 2.28E-01 Sample ID: 489722 Sample Dates: 11/19/2018 - 11/26/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.28E-02 0.00E+00 2.28E-02 Cs-134 <1.33E-02 0.00E+00 1.33E-02 Cs-137 <1.45E-02 0.00E+00 1.45E-02 Be-7 <1.01E-01 0.00E+00 1.01E-01 K-40 3.45E-01 1.56E-01 1.63E-01 Sample ID: 490138 Sample Dates: 11/26/2018 - 12/3/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.11E-02 0.00E+00 2.11E-02 Cs-134 <1.76E-02 0.00E+00 1.76E-02 Cs-137 <1.86E-02 0.00E+00 1.86E-02 Be-7 <1.45E-01 0.00E+00 1.45E-01 K-40 5.63E-01 1.87E-01 1.33E-01 Sample ID: 490784 Sample Dates: 12/3/2018 - 12/11/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.88E-02 0.00E+00 1.88E-02 Cs-134 <1.46E-02 0.00E+00 1.46E-02 Cs-137 <1.67E-02 0.00E+00 1.67E-02 Be-7 <1.15E-01 0.00E+00 1.15E-01 K-40 3.22E-01 1.50E-01 1.71E-01 Sample ID: 491164 Sample Dates: 12/11/2018 - 12/18/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.13E-02 0.00E+00 2.13E-02 Cs-134 <1.36E-02 0.00E+00 1.36E-02 Cs-137 <1.17E-02 0.00E+00 1.17E-02 Be-7 <1.00E-01 0.00E+00 1.00E-01 K-40 <2.78E-01 0.00E+00 2.78E-01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 55 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 47 Sample Point 47 [ INDICATOR - SSW @ 3.4 miles ]

Sample ID: 491468 Sample Dates: 12/18/2018 - 12/26/2018 Nuclide Activity 2 Sigma Error MDA I-131 <3.20E-02 0.00E+00 3.20E-02 Cs-134 <1.81E-02 0.00E+00 1.81E-02 Cs-137 <1.37E-02 0.00E+00 1.37E-02 Be-7 <9.84E-02 0.00E+00 9.84E-02 K-40 3.56E-01 1.37E-01 1.08E-01 Sample ID: 491733 Sample Dates: 12/26/2018 - 12/31/2018 Nuclide Activity 2 Sigma Error MDA I-131 <5.02E-02 0.00E+00 5.02E-02 Cs-134 <2.87E-02 0.00E+00 2.87E-02 Cs-137 <2.37E-02 0.00E+00 2.37E-02 Be-7 <1.50E-01 0.00E+00 1.50E-01 K-40 4.62E-01 2.65E-01 3.57E-01 Sample Point 63 [ INDICATOR - SW @ 0.6 miles ]

Sample ID: 465979 Sample Dates: 1/2/2018 - 1/8/2018 Nuclide Activity 2 Sigma Error MDA I-131 <3.10E-02 0.00E+00 3.10E-02 Cs-134 <1.92E-02 0.00E+00 1.92E-02 Cs-137 <1.64E-02 0.00E+00 1.64E-02 Be-7 <1.48E-01 0.00E+00 1.48E-01 K-40 5.56E-01 2.30E-01 2.62E-01 Sample ID: 466179 Sample Dates: 1/8/2018 - 1/15/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.60E-02 0.00E+00 2.60E-02 Cs-134 <1.81E-02 0.00E+00 1.81E-02 Cs-137 <1.70E-02 0.00E+00 1.70E-02 Be-7 <1.18E-01 0.00E+00 1.18E-01 K-40 3.44E-01 1.80E-01 2.29E-01 Sample ID: 466377 Sample Dates: 1/15/2018 - 1/22/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.22E-02 0.00E+00 2.22E-02 Cs-134 <1.68E-02 0.00E+00 1.68E-02 Cs-137 <1.49E-02 0.00E+00 1.49E-02 Be-7 <1.15E-01 0.00E+00 1.15E-01 K-40 5.74E-01 1.94E-01 1.72E-01 Sample ID: 466965 Sample Dates: 1/22/2018 - 1/29/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.45E-02 0.00E+00 2.45E-02 Cs-134 <2.01E-02 0.00E+00 2.01E-02 Cs-137 <2.05E-02 0.00E+00 2.05E-02 Be-7 <1.26E-01 0.00E+00 1.26E-01 K-40 5.72E-01 2.17E-01 2.35E-01 Sample ID: 467324 Sample Dates: 1/29/2018 - 2/5/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.22E-02 0.00E+00 2.22E-02 Cs-134 <1.58E-02 0.00E+00 1.58E-02 Cs-137 <1.81E-02 0.00E+00 1.81E-02 Be-7 <1.33E-01 0.00E+00 1.33E-01 K-40 3.62E-01 1.60E-01 1.66E-01 Sample ID: 467633 Sample Dates: 2/5/2018 - 2/12/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.35E-02 0.00E+00 2.35E-02 Cs-134 <2.12E-02 0.00E+00 2.12E-02 Cs-137 <1.80E-02 0.00E+00 1.80E-02 Be-7 <1.17E-01 0.00E+00 1.17E-01 K-40 4.27E-01 1.68E-01 1.53E-01 Sample ID: 468425 Sample Dates: 2/12/2018 - 2/19/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.54E-02 0.00E+00 2.54E-02 Cs-134 <1.60E-02 0.00E+00 1.60E-02 Cs-137 <1.76E-02 0.00E+00 1.76E-02 Be-7 <1.43E-01 0.00E+00 1.43E-01 K-40 5.90E-01 1.87E-01 1.34E-01 Sample ID: 468746 Sample Dates: 2/19/2018 - 2/26/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.34E-02 0.00E+00 2.34E-02 Cs-134 <2.01E-02 0.00E+00 2.01E-02 Cs-137 <1.82E-02 0.00E+00 1.82E-02 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 56 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 63 Sample Point 63 [ INDICATOR - SW @ 0.6 miles ]

Sample ID: 468746 Sample Dates: 2/19/2018 - 2/26/2018 Nuclide Activity 2 Sigma Error MDA Be-7 <1.23E-01 0.00E+00 1.23E-01 K-40 <4.31E-01 0.00E+00 4.31E-01 Sample ID: 469558 Sample Dates: 2/26/2018 - 3/5/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.66E-02 0.00E+00 2.66E-02 Cs-134 <1.81E-02 0.00E+00 1.81E-02 Cs-137 <1.54E-02 0.00E+00 1.54E-02 Be-7 <1.07E-01 0.00E+00 1.07E-01 K-40 4.76E-01 1.61E-01 3.49E-02 Sample ID: 470580 Sample Dates: 3/5/2018 - 3/12/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.36E-02 0.00E+00 2.36E-02 Cs-134 <1.58E-02 0.00E+00 1.58E-02 Cs-137 <1.63E-02 0.00E+00 1.63E-02 Be-7 <1.21E-01 0.00E+00 1.21E-01 K-40 7.77E-01 2.08E-01 3.45E-02 Sample ID: 471147 Sample Dates: 3/12/2018 - 3/19/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.35E-02 0.00E+00 2.35E-02 Cs-134 <1.86E-02 0.00E+00 1.86E-02 Cs-137 <1.31E-02 0.00E+00 1.31E-02 Be-7 <1.19E-01 0.00E+00 1.19E-01 K-40 5.70E-01 1.74E-01 3.36E-02 Sample ID: 471702 Sample Dates: 3/19/2018 - 3/26/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.06E-02 0.00E+00 2.06E-02 Cs-134 <1.81E-02 0.00E+00 1.81E-02 Cs-137 <1.54E-02 0.00E+00 1.54E-02 Be-7 <1.34E-01 0.00E+00 1.34E-01 K-40 3.82E-01 1.96E-01 2.51E-01 Sample ID: 472489 Sample Dates: 3/26/2018 - 4/2/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.31E-02 0.00E+00 2.31E-02 Cs-134 <1.84E-02 0.00E+00 1.84E-02 Cs-137 <2.10E-02 0.00E+00 2.10E-02 Be-7 <1.15E-01 0.00E+00 1.15E-01 K-40 <3.53E-01 0.00E+00 3.53E-01 Sample ID: 472964 Sample Dates: 4/2/2018 - 4/9/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.13E-02 0.00E+00 2.13E-02 Cs-134 <2.01E-02 0.00E+00 2.01E-02 Cs-137 <2.11E-02 0.00E+00 2.11E-02 Be-7 <1.32E-01 0.00E+00 1.32E-01 K-40 5.70E-01 2.10E-01 2.19E-01 Sample ID: 473255 Sample Dates: 4/9/2018 - 4/16/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.04E-02 0.00E+00 2.04E-02 Cs-134 <2.02E-02 0.00E+00 2.02E-02 Cs-137 <1.63E-02 0.00E+00 1.63E-02 Be-7 <1.16E-01 0.00E+00 1.16E-01 K-40 4.68E-01 1.82E-01 1.88E-01 Sample ID: 473620 Sample Dates: 4/16/2018 - 4/23/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.37E-02 0.00E+00 2.37E-02 Cs-134 <1.74E-02 0.00E+00 1.74E-02 Cs-137 <1.35E-02 0.00E+00 1.35E-02 Be-7 <1.15E-01 0.00E+00 1.15E-01 K-40 4.46E-01 2.12E-01 2.68E-01 Sample ID: 474140 Sample Dates: 4/23/2018 - 4/30/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.71E-02 0.00E+00 2.71E-02 Cs-134 <1.64E-02 0.00E+00 1.64E-02 Cs-137 <1.51E-02 0.00E+00 1.51E-02 Be-7 <1.01E-01 0.00E+00 1.01E-01 K-40 4.16E-01 1.49E-01 3.42E-02 Sample ID: 474518 Sample Dates: 4/30/2018 - 5/7/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.19E-02 0.00E+00 2.19E-02 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 57 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 63 Sample Point 63 [ INDICATOR - SW @ 0.6 miles ]

Sample ID: 474518 Sample Dates: 4/30/2018 - 5/7/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.55E-02 0.00E+00 1.55E-02 Cs-137 <1.51E-02 0.00E+00 1.51E-02 Be-7 <1.44E-01 0.00E+00 1.44E-01 K-40 5.19E-01 2.06E-01 2.29E-01 Sample ID: 474877 Sample Dates: 5/7/2018 - 5/14/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.13E-02 0.00E+00 2.13E-02 Cs-134 <2.00E-02 0.00E+00 2.00E-02 Cs-137 <1.83E-02 0.00E+00 1.83E-02 Be-7 <1.14E-01 0.00E+00 1.14E-01 K-40 4.54E-01 1.79E-01 1.86E-01 Sample ID: 475201 Sample Dates: 5/14/2018 - 5/21/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.30E-02 0.00E+00 2.30E-02 Cs-134 <1.58E-02 0.00E+00 1.58E-02 Cs-137 <1.95E-02 0.00E+00 1.95E-02 Be-7 <1.16E-01 0.00E+00 1.16E-01 K-40 5.84E-01 1.97E-01 1.56E-01 Sample ID: 475526 Sample Dates: 5/21/2018 - 5/29/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.98E-02 0.00E+00 1.98E-02 Cs-134 <1.77E-02 0.00E+00 1.77E-02 Cs-137 <1.51E-02 0.00E+00 1.51E-02 Be-7 <1.11E-01 0.00E+00 1.11E-01 K-40 3.22E-01 1.80E-01 2.49E-01 Sample ID: 476351 Sample Dates: 5/29/2018 - 6/4/2018 Nuclide Activity 2 Sigma Error MDA I-131 <3.04E-02 0.00E+00 3.04E-02 Cs-134 <2.32E-02 0.00E+00 2.32E-02 Cs-137 <1.98E-02 0.00E+00 1.98E-02 Be-7 <1.24E-01 0.00E+00 1.24E-01 K-40 3.85E-01 2.07E-01 2.66E-01 Sample ID: 477363 Sample Dates: 6/4/2018 - 6/11/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.87E-02 0.00E+00 1.87E-02 Cs-134 <1.55E-02 0.00E+00 1.55E-02 Cs-137 <1.87E-02 0.00E+00 1.87E-02 Be-7 <1.09E-01 0.00E+00 1.09E-01 K-40 4.17E-01 2.00E-01 2.55E-01 Sample ID: 478093 Sample Dates: 6/11/2018 - 6/18/2018 Nuclide Activity 2 Sigma Error MDA I-131 <3.63E-02 0.00E+00 3.63E-02 Cs-134 <1.67E-02 0.00E+00 1.67E-02 Cs-137 <2.17E-02 0.00E+00 2.17E-02 Be-7 <1.41E-01 0.00E+00 1.41E-01 K-40 4.14E-01 1.79E-01 1.92E-01 Sample ID: 478413 Sample Dates: 6/18/2018 - 6/25/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.55E-02 0.00E+00 2.55E-02 Cs-134 <1.78E-02 0.00E+00 1.78E-02 Cs-137 <1.81E-02 0.00E+00 1.81E-02 Be-7 <1.19E-01 0.00E+00 1.19E-01 K-40 4.62E-01 1.66E-01 1.21E-01 Sample ID: 478773 Sample Dates: 6/25/2018 - 7/2/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.15E-02 0.00E+00 2.15E-02 Cs-134 <1.97E-02 0.00E+00 1.97E-02 Cs-137 <1.51E-02 0.00E+00 1.51E-02 Be-7 <1.46E-01 0.00E+00 1.46E-01 K-40 4.77E-01 2.07E-01 2.46E-01 Sample ID: 479045 Sample Dates: 7/2/2018 - 7/9/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.30E-02 0.00E+00 2.30E-02 Cs-134 <1.85E-02 0.00E+00 1.85E-02 Cs-137 <1.58E-02 0.00E+00 1.58E-02 Be-7 <1.27E-01 0.00E+00 1.27E-01 K-40 6.31E-01 1.91E-01 1.24E-01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 58 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 63 Sample Point 63 [ INDICATOR - SW @ 0.6 miles ]

Sample ID: 479866 Sample Dates: 7/9/2018 - 7/16/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.97E-02 0.00E+00 1.97E-02 Cs-134 <1.79E-02 0.00E+00 1.79E-02 Cs-137 <1.89E-02 0.00E+00 1.89E-02 Be-7 <1.38E-01 0.00E+00 1.38E-01 K-40 5.22E-01 2.20E-01 2.62E-01 Sample ID: 480236 Sample Dates: 7/16/2018 - 7/23/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.97E-02 0.00E+00 1.97E-02 Cs-134 <1.79E-02 0.00E+00 1.79E-02 Cs-137 <1.41E-02 0.00E+00 1.41E-02 Be-7 <1.29E-01 0.00E+00 1.29E-01 K-40 5.28E-01 1.76E-01 1.17E-01 Sample ID: 481063 Sample Dates: 7/23/2018 - 7/30/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.44E-02 0.00E+00 2.44E-02 Cs-134 <1.69E-02 0.00E+00 1.69E-02 Cs-137 <1.76E-02 0.00E+00 1.76E-02 Be-7 <1.05E-01 0.00E+00 1.05E-01 K-40 5.11E-01 1.88E-01 1.73E-01 Sample ID: 481507 Sample Dates: 7/30/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.81E-02 0.00E+00 2.81E-02 Cs-134 <1.94E-02 0.00E+00 1.94E-02 Cs-137 <1.30E-02 0.00E+00 1.30E-02 Be-7 <1.09E-01 0.00E+00 1.09E-01 K-40 4.55E-01 1.67E-01 1.28E-01 Sample ID: 481940 Sample Dates: 8/6/2018 - 8/13/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.09E-02 0.00E+00 2.09E-02 Cs-134 <1.85E-02 0.00E+00 1.85E-02 Cs-137 <1.77E-02 0.00E+00 1.77E-02 Be-7 <1.17E-01 0.00E+00 1.17E-01 K-40 5.32E-01 2.04E-01 2.19E-01 Sample ID: 482472 Sample Dates: 8/13/2018 - 8/20/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.55E-02 0.00E+00 1.55E-02 Cs-134 <1.33E-02 0.00E+00 1.33E-02 Cs-137 <1.48E-02 0.00E+00 1.48E-02 Be-7 <9.20E-02 0.00E+00 9.20E-02 K-40 1.69E-01 1.13E-01 1.42E-01 Sample ID: 482797 Sample Dates: 8/20/2018 - 8/27/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.45E-02 0.00E+00 1.45E-02 Cs-134 <1.46E-02 0.00E+00 1.46E-02 Cs-137 <1.42E-02 0.00E+00 1.42E-02 Be-7 <9.46E-02 0.00E+00 9.46E-02 K-40 <3.37E-01 0.00E+00 3.37E-01 Sample ID: 483422 Sample Dates: 8/27/2018 - 9/4/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.97E-02 0.00E+00 1.97E-02 Cs-134 <1.64E-02 0.00E+00 1.64E-02 Cs-137 <1.56E-02 0.00E+00 1.56E-02 Be-7 <7.00E-02 0.00E+00 7.00E-02 K-40 4.77E-01 1.89E-01 2.19E-01 Sample ID: 483997 Sample Dates: 9/4/2018 - 9/10/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.81E-02 0.00E+00 2.81E-02 Cs-134 <1.76E-02 0.00E+00 1.76E-02 Cs-137 <1.95E-02 0.00E+00 1.95E-02 Be-7 <1.60E-01 0.00E+00 1.60E-01 K-40 5.66E-01 2.35E-01 2.61E-01 Sample ID: 484167 Sample Dates: 9/10/2018 - 9/17/2018 Nuclide Activity 2 Sigma Error MDA I-131 <3.23E-02 0.00E+00 3.23E-02 Cs-134 <1.94E-02 0.00E+00 1.94E-02 Cs-137 <1.91E-02 0.00E+00 1.91E-02 Be-7 <1.30E-01 0.00E+00 1.30E-01 K-40 5.50E-01 2.01E-01 2.07E-01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 59 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 63 Sample Point 63 [ INDICATOR - SW @ 0.6 miles ]

Sample ID: 485018 Sample Dates: 9/17/2018 - 9/24/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.28E-02 0.00E+00 2.28E-02 Cs-134 <1.27E-02 0.00E+00 1.27E-02 Cs-137 <1.57E-02 0.00E+00 1.57E-02 Be-7 <1.19E-01 0.00E+00 1.19E-01 K-40 4.57E-01 1.98E-01 2.30E-01 Sample ID: 485248 Sample Dates: 9/24/2018 - 10/1/2018 Nuclide Activity 2 Sigma Error MDA I-131 <3.50E-02 0.00E+00 3.50E-02 Cs-134 <2.00E-02 0.00E+00 2.00E-02 Cs-137 <1.75E-02 0.00E+00 1.75E-02 Be-7 <1.07E-01 0.00E+00 1.07E-01 K-40 4.64E-01 1.55E-01 3.31E-02 Sample ID: 486142 Sample Dates: 10/1/2018 - 10/8/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.15E-02 0.00E+00 2.15E-02 Cs-134 <1.52E-02 0.00E+00 1.52E-02 Cs-137 <1.73E-02 0.00E+00 1.73E-02 Be-7 <1.21E-01 0.00E+00 1.21E-01 K-40 4.49E-01 2.17E-01 2.79E-01 Sample ID: 486688 Sample Dates: 10/8/2018 - 10/15/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.10E-02 0.00E+00 2.10E-02 Cs-134 <1.77E-02 0.00E+00 1.77E-02 Cs-137 <1.51E-02 0.00E+00 1.51E-02 Be-7 <1.19E-01 0.00E+00 1.19E-01 K-40 4.16E-01 2.04E-01 2.66E-01 Sample ID: 487727 Sample Dates: 10/15/2018 - 10/22/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.32E-02 0.00E+00 2.32E-02 Cs-134 <1.82E-02 0.00E+00 1.82E-02 Cs-137 <2.06E-02 0.00E+00 2.06E-02 Be-7 <1.17E-01 0.00E+00 1.17E-01 K-40 4.12E-01 1.65E-01 1.49E-01 Sample ID: 487974 Sample Dates: 10/22/2018 - 10/29/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.34E-02 0.00E+00 2.34E-02 Cs-134 <1.73E-02 0.00E+00 1.73E-02 Cs-137 <1.31E-02 0.00E+00 1.31E-02 Be-7 <1.15E-01 0.00E+00 1.15E-01 K-40 2.49E-01 1.88E-01 2.82E-01 Sample ID: 488459 Sample Dates: 10/29/2018 - 11/5/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.01E-02 0.00E+00 2.01E-02 Cs-134 <2.01E-02 0.00E+00 2.01E-02 Cs-137 <1.66E-02 0.00E+00 1.66E-02 Be-7 <1.26E-01 0.00E+00 1.26E-01 K-40 4.55E-01 1.74E-01 1.47E-01 Sample ID: 488835 Sample Dates: 11/5/2018 - 11/12/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.32E-02 0.00E+00 2.32E-02 Cs-134 <1.25E-02 0.00E+00 1.25E-02 Cs-137 <1.68E-02 0.00E+00 1.68E-02 Be-7 <1.24E-01 0.00E+00 1.24E-01 K-40 4.49E-01 1.88E-01 2.08E-01 Sample ID: 489139 Sample Dates: 11/12/2018 - 11/19/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.31E-02 0.00E+00 2.31E-02 Cs-134 <1.99E-02 0.00E+00 1.99E-02 Cs-137 <2.01E-02 0.00E+00 2.01E-02 Be-7 <1.12E-01 0.00E+00 1.12E-01 K-40 4.34E-01 2.05E-01 2.60E-01 Sample ID: 489724 Sample Dates: 11/19/2018 - 11/26/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.34E-02 0.00E+00 2.34E-02 Cs-134 <1.74E-02 0.00E+00 1.74E-02 Cs-137 <1.48E-02 0.00E+00 1.48E-02 Be-7 <1.21E-01 0.00E+00 1.21E-01 K-40 4.95E-01 1.61E-01 3.36E-02 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 60 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 63 Sample Point 63 [ INDICATOR - SW @ 0.6 miles ]

Sample ID: 490140 Sample Dates: 11/26/2018 - 12/3/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.17E-02 0.00E+00 2.17E-02 Cs-134 <2.05E-02 0.00E+00 2.05E-02 Cs-137 <1.64E-02 0.00E+00 1.64E-02 Be-7 <1.33E-01 0.00E+00 1.33E-01 K-40 3.88E-01 1.70E-01 1.77E-01 Sample ID: 490786 Sample Dates: 12/3/2018 - 12/11/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.04E-02 0.00E+00 2.04E-02 Cs-134 <1.63E-02 0.00E+00 1.63E-02 Cs-137 <1.39E-02 0.00E+00 1.39E-02 Be-7 <1.13E-01 0.00E+00 1.13E-01 K-40 5.55E-01 1.76E-01 1.37E-01 Sample ID: 491166 Sample Dates: 12/11/2018 - 12/18/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.55E-02 0.00E+00 2.55E-02 Cs-134 <1.88E-02 0.00E+00 1.88E-02 Cs-137 <1.94E-02 0.00E+00 1.94E-02 Be-7 <1.32E-01 0.00E+00 1.32E-01 K-40 4.29E-01 2.06E-01 2.63E-01 Sample ID: 491470 Sample Dates: 12/18/2018 - 12/26/2018 Nuclide Activity 2 Sigma Error MDA I-131 <3.61E-02 0.00E+00 3.61E-02 Cs-134 <1.48E-02 0.00E+00 1.48E-02 Cs-137 <1.44E-02 0.00E+00 1.44E-02 Be-7 <1.12E-01 0.00E+00 1.12E-01 K-40 2.74E-01 1.47E-01 1.87E-01 Sample ID: 491735 Sample Dates: 12/26/2018 - 12/31/2018 Nuclide Activity 2 Sigma Error MDA I-131 <3.84E-02 0.00E+00 3.84E-02 Cs-134 <2.58E-02 0.00E+00 2.58E-02 Cs-137 <1.81E-02 0.00E+00 1.81E-02 Be-7 <1.81E-01 0.00E+00 1.81E-01 K-40 6.00E-01 2.93E-01 3.72E-01 Sample Point 90 [ INDICATOR - SSW @ 0.5 miles ]

Sample ID: 465980 Sample Dates: 1/2/2018 - 1/8/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.99E-02 0.00E+00 2.99E-02 Cs-134 <1.84E-02 0.00E+00 1.84E-02 Cs-137 <1.89E-02 0.00E+00 1.89E-02 Be-7 <1.38E-01 0.00E+00 1.38E-01 K-40 4.77E-01 2.10E-01 2.38E-01 Sample ID: 466180 Sample Dates: 1/8/2018 - 1/15/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.49E-02 0.00E+00 2.49E-02 Cs-134 <1.88E-02 0.00E+00 1.88E-02 Cs-137 <2.31E-02 0.00E+00 2.31E-02 Be-7 <1.18E-01 0.00E+00 1.18E-01 K-40 5.30E-01 2.05E-01 2.22E-01 Sample ID: 466378 Sample Dates: 1/15/2018 - 1/22/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.44E-02 0.00E+00 2.44E-02 Cs-134 <1.62E-02 0.00E+00 1.62E-02 Cs-137 <1.59E-02 0.00E+00 1.59E-02 Be-7 <1.12E-01 0.00E+00 1.12E-01 K-40 4.62E-01 1.65E-01 1.25E-01 Sample ID: 466966 Sample Dates: 1/22/2018 - 1/29/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.43E-02 0.00E+00 2.43E-02 Cs-134 <1.95E-02 0.00E+00 1.95E-02 Cs-137 <1.72E-02 0.00E+00 1.72E-02 Be-7 <1.13E-01 0.00E+00 1.13E-01 K-40 4.48E-01 1.91E-01 2.11E-01 Sample ID: 467325 Sample Dates: 1/29/2018 - 2/5/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.60E-02 0.00E+00 2.60E-02 Cs-134 <1.78E-02 0.00E+00 1.78E-02 Cs-137 <1.85E-02 0.00E+00 1.85E-02 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 61 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 90 Sample Point 90 [ INDICATOR - SSW @ 0.5 miles ]

Sample ID: 467325 Sample Dates: 1/29/2018 - 2/5/2018 Nuclide Activity 2 Sigma Error MDA Be-7 <1.24E-01 0.00E+00 1.24E-01 K-40 6.26E-01 2.00E-01 1.61E-01 Sample ID: 467634 Sample Dates: 2/5/2018 - 2/12/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.43E-02 0.00E+00 2.43E-02 Cs-134 <1.82E-02 0.00E+00 1.82E-02 Cs-137 <1.24E-02 0.00E+00 1.24E-02 Be-7 <1.14E-01 0.00E+00 1.14E-01 K-40 4.48E-01 1.94E-01 2.25E-01 Sample ID: 468426 Sample Dates: 2/12/2018 - 2/19/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.59E-02 0.00E+00 2.59E-02 Cs-134 <2.02E-02 0.00E+00 2.02E-02 Cs-137 <1.84E-02 0.00E+00 1.84E-02 Be-7 <1.19E-01 0.00E+00 1.19E-01 K-40 3.47E-01 1.45E-01 1.26E-01 Sample ID: 468747 Sample Dates: 2/19/2018 - 2/26/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.57E-02 0.00E+00 2.57E-02 Cs-134 <2.01E-02 0.00E+00 2.01E-02 Cs-137 <1.86E-02 0.00E+00 1.86E-02 Be-7 <1.29E-01 0.00E+00 1.29E-01 K-40 5.85E-01 2.18E-01 2.32E-01 Sample ID: 469559 Sample Dates: 2/26/2018 - 3/5/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.45E-02 0.00E+00 2.45E-02 Cs-134 <1.81E-02 0.00E+00 1.81E-02 Cs-137 <1.60E-02 0.00E+00 1.60E-02 Be-7 <1.07E-01 0.00E+00 1.07E-01 K-40 4.79E-01 1.93E-01 2.10E-01 Sample ID: 470581 Sample Dates: 3/5/2018 - 3/12/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.29E-02 0.00E+00 2.29E-02 Cs-134 <1.73E-02 0.00E+00 1.73E-02 Cs-137 <1.82E-02 0.00E+00 1.82E-02 Be-7 <1.35E-01 0.00E+00 1.35E-01 K-40 4.39E-01 2.06E-01 2.60E-01 Sample ID: 471148 Sample Dates: 3/12/2018 - 3/19/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.24E-02 0.00E+00 2.24E-02 Cs-134 <1.97E-02 0.00E+00 1.97E-02 Cs-137 <1.59E-02 0.00E+00 1.59E-02 Be-7 <1.25E-01 0.00E+00 1.25E-01 K-40 3.69E-01 2.04E-01 2.80E-01 Sample ID: 471703 Sample Dates: 3/19/2018 - 3/26/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.14E-02 0.00E+00 2.14E-02 Cs-134 <1.58E-02 0.00E+00 1.58E-02 Cs-137 <1.71E-02 0.00E+00 1.71E-02 Be-7 <1.28E-01 0.00E+00 1.28E-01 K-40 4.22E-01 1.96E-01 2.37E-01 Sample ID: 472490 Sample Dates: 3/26/2018 - 4/2/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.49E-02 0.00E+00 2.49E-02 Cs-134 <2.07E-02 0.00E+00 2.07E-02 Cs-137 <1.41E-02 0.00E+00 1.41E-02 Be-7 <1.21E-01 0.00E+00 1.21E-01 K-40 5.42E-01 2.04E-01 2.17E-01 Sample ID: 472965 Sample Dates: 4/2/2018 - 4/9/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.43E-02 0.00E+00 2.43E-02 Cs-134 <1.69E-02 0.00E+00 1.69E-02 Cs-137 <1.81E-02 0.00E+00 1.81E-02 Be-7 <1.23E-01 0.00E+00 1.23E-01 K-40 4.71E-01 1.86E-01 1.90E-01 Sample ID: 473256 Sample Dates: 4/9/2018 - 4/16/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.05E-02 0.00E+00 2.05E-02 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 62 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 90 Sample Point 90 [ INDICATOR - SSW @ 0.5 miles ]

Sample ID: 473256 Sample Dates: 4/9/2018 - 4/16/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.80E-02 0.00E+00 1.80E-02 Cs-137 <1.93E-02 0.00E+00 1.93E-02 Be-7 <1.25E-01 0.00E+00 1.25E-01 K-40 3.43E-01 1.78E-01 2.28E-01 Sample ID: 473621 Sample Dates: 4/16/2018 - 4/23/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.50E-02 0.00E+00 2.50E-02 Cs-134 <1.58E-02 0.00E+00 1.58E-02 Cs-137 <1.42E-02 0.00E+00 1.42E-02 Be-7 <1.37E-01 0.00E+00 1.37E-01 K-40 4.78E-01 1.94E-01 2.05E-01 Sample ID: 474141 Sample Dates: 4/23/2018 - 4/30/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.40E-02 0.00E+00 2.40E-02 Cs-134 <1.57E-02 0.00E+00 1.57E-02 Cs-137 <1.51E-02 0.00E+00 1.51E-02 Be-7 <1.08E-01 0.00E+00 1.08E-01 K-40 4.42E-01 1.66E-01 1.37E-01 Sample ID: 474519 Sample Dates: 4/30/2018 - 5/7/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.24E-02 0.00E+00 2.24E-02 Cs-134 <1.63E-02 0.00E+00 1.63E-02 Cs-137 <1.57E-02 0.00E+00 1.57E-02 Be-7 <1.49E-01 0.00E+00 1.49E-01 K-40 4.71E-01 2.06E-01 2.47E-01 Sample ID: 474878 Sample Dates: 5/7/2018 - 5/14/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.28E-02 0.00E+00 2.28E-02 Cs-134 <1.53E-02 0.00E+00 1.53E-02 Cs-137 <1.57E-02 0.00E+00 1.57E-02 Be-7 <1.14E-01 0.00E+00 1.14E-01 K-40 4.66E-01 1.77E-01 1.73E-01 Sample ID: 475202 Sample Dates: 5/14/2018 - 5/21/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.17E-02 0.00E+00 2.17E-02 Cs-134 <1.73E-02 0.00E+00 1.73E-02 Cs-137 <1.86E-02 0.00E+00 1.86E-02 Be-7 <1.22E-01 0.00E+00 1.22E-01 K-40 4.09E-01 1.84E-01 2.07E-01 Sample ID: 475527 Sample Dates: 5/21/2018 - 5/29/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.69E-02 0.00E+00 1.69E-02 Cs-134 <1.44E-02 0.00E+00 1.44E-02 Cs-137 <1.66E-02 0.00E+00 1.66E-02 Be-7 <1.06E-01 0.00E+00 1.06E-01 K-40 2.46E-01 1.22E-01 1.29E-01 Sample ID: 476352 Sample Dates: 5/29/2018 - 6/4/2018 Nuclide Activity 2 Sigma Error MDA I-131 <3.01E-02 0.00E+00 3.01E-02 Cs-134 <1.78E-02 0.00E+00 1.78E-02 Cs-137 <2.39E-02 0.00E+00 2.39E-02 Be-7 <1.47E-01 0.00E+00 1.47E-01 K-40 5.06E-01 2.37E-01 2.96E-01 Sample ID: 477364 Sample Dates: 6/4/2018 - 6/11/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.07E-02 0.00E+00 2.07E-02 Cs-134 <1.69E-02 0.00E+00 1.69E-02 Cs-137 <1.60E-02 0.00E+00 1.60E-02 Be-7 <1.15E-01 0.00E+00 1.15E-01 K-40 4.50E-01 1.65E-01 1.30E-01 Sample ID: 478094 Sample Dates: 6/11/2018 - 6/18/2018 Nuclide Activity 2 Sigma Error MDA I-131 <3.92E-02 0.00E+00 3.92E-02 Cs-134 <1.82E-02 0.00E+00 1.82E-02 Cs-137 <1.91E-02 0.00E+00 1.91E-02 Be-7 <1.35E-01 0.00E+00 1.35E-01 K-40 6.25E-01 2.13E-01 1.97E-01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 63 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 90 Sample Point 90 [ INDICATOR - SSW @ 0.5 miles ]

Sample ID: 478414 Sample Dates: 6/18/2018 - 6/25/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.48E-02 0.00E+00 2.48E-02 Cs-134 <1.85E-02 0.00E+00 1.85E-02 Cs-137 <1.57E-02 0.00E+00 1.57E-02 Be-7 <1.13E-01 0.00E+00 1.13E-01 K-40 3.21E-01 1.69E-01 2.11E-01 Sample ID: 478774 Sample Dates: 6/25/2018 - 7/2/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.27E-02 0.00E+00 2.27E-02 Cs-134 <1.90E-02 0.00E+00 1.90E-02 Cs-137 <1.57E-02 0.00E+00 1.57E-02 Be-7 <1.14E-01 0.00E+00 1.14E-01 K-40 6.24E-01 2.11E-01 1.95E-01 Sample ID: 479046 Sample Dates: 7/2/2018 - 7/9/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.91E-02 0.00E+00 1.91E-02 Cs-134 <1.96E-02 0.00E+00 1.96E-02 Cs-137 <1.37E-02 0.00E+00 1.37E-02 Be-7 <1.10E-01 0.00E+00 1.10E-01 K-40 4.43E-01 1.75E-01 1.77E-01 Sample ID: 479867 Sample Dates: 7/9/2018 - 7/16/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.20E-02 0.00E+00 2.20E-02 Cs-134 <1.98E-02 0.00E+00 1.98E-02 Cs-137 <2.26E-02 0.00E+00 2.26E-02 Be-7 <1.18E-01 0.00E+00 1.18E-01 K-40 4.45E-01 1.85E-01 1.97E-01 Sample ID: 480237 Sample Dates: 7/16/2018 - 7/23/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.25E-02 0.00E+00 2.25E-02 Cs-134 <1.85E-02 0.00E+00 1.85E-02 Cs-137 <1.95E-02 0.00E+00 1.95E-02 Be-7 <1.08E-01 0.00E+00 1.08E-01 K-40 4.11E-01 2.02E-01 2.61E-01 Sample ID: 481064 Sample Dates: 7/23/2018 - 7/30/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.40E-02 0.00E+00 2.40E-02 Cs-134 <1.69E-02 0.00E+00 1.69E-02 Cs-137 <1.76E-02 0.00E+00 1.76E-02 Be-7 <1.22E-01 0.00E+00 1.22E-01 K-40 4.03E-01 1.88E-01 2.25E-01 Sample ID: 481508 Sample Dates: 7/30/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA I-131 <3.33E-02 0.00E+00 3.33E-02 Cs-134 <1.94E-02 0.00E+00 1.94E-02 Cs-137 <1.80E-02 0.00E+00 1.80E-02 Be-7 <1.01E-01 0.00E+00 1.01E-01 K-40 4.13E-01 1.96E-01 2.44E-01 Sample ID: 481941 Sample Dates: 8/6/2018 - 8/13/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.52E-02 0.00E+00 2.52E-02 Cs-134 <1.14E-02 0.00E+00 1.14E-02 Cs-137 <1.63E-02 0.00E+00 1.63E-02 Be-7 <1.04E-01 0.00E+00 1.04E-01 K-40 4.33E-01 1.87E-01 2.13E-01 Sample ID: 482473 Sample Dates: 8/13/2018 - 8/20/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.64E-02 0.00E+00 1.64E-02 Cs-134 <1.03E-02 0.00E+00 1.03E-02 Cs-137 <1.38E-02 0.00E+00 1.38E-02 Be-7 <9.77E-02 0.00E+00 9.77E-02 K-40 2.20E-01 1.15E-01 1.07E-01 Sample ID: 482798 Sample Dates: 8/20/2018 - 8/27/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.01E-02 0.00E+00 1.01E-02 Cs-134 <1.57E-02 0.00E+00 1.57E-02 Cs-137 <1.35E-02 0.00E+00 1.35E-02 Be-7 <1.23E-01 0.00E+00 1.23E-01 K-40 <2.93E-01 0.00E+00 2.93E-01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 64 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 90 Sample Point 90 [ INDICATOR - SSW @ 0.5 miles ]

Sample ID: 483423 Sample Dates: 8/27/2018 - 9/4/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.91E-02 0.00E+00 1.91E-02 Cs-134 <1.30E-02 0.00E+00 1.30E-02 Cs-137 <1.04E-02 0.00E+00 1.04E-02 Be-7 <7.77E-02 0.00E+00 7.77E-02 K-40 3.16E-01 1.66E-01 2.18E-01 Sample ID: 483998 Sample Dates: 9/4/2018 - 9/10/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.78E-02 0.00E+00 2.78E-02 Cs-134 <2.20E-02 0.00E+00 2.20E-02 Cs-137 <2.45E-02 0.00E+00 2.45E-02 Be-7 <1.67E-01 0.00E+00 1.67E-01 K-40 5.97E-01 1.99E-01 4.25E-02 Sample ID: 484168 Sample Dates: 9/10/2018 - 9/17/2018 Nuclide Activity 2 Sigma Error MDA I-131 <4.26E-02 0.00E+00 4.26E-02 Cs-134 <1.77E-02 0.00E+00 1.77E-02 Cs-137 <1.65E-02 0.00E+00 1.65E-02 Be-7 <1.07E-01 0.00E+00 1.07E-01 K-40 3.74E-01 1.72E-01 1.98E-01 Sample ID: 485019 Sample Dates: 9/17/2018 - 9/24/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.41E-02 0.00E+00 2.41E-02 Cs-134 <1.55E-02 0.00E+00 1.55E-02 Cs-137 <2.04E-02 0.00E+00 2.04E-02 Be-7 <1.05E-01 0.00E+00 1.05E-01 K-40 <3.22E-01 0.00E+00 3.22E-01 Sample ID: 485249 Sample Dates: 9/24/2018 - 10/1/2018 Nuclide Activity 2 Sigma Error MDA I-131 <3.19E-02 0.00E+00 3.19E-02 Cs-134 <1.66E-02 0.00E+00 1.66E-02 Cs-137 <1.75E-02 0.00E+00 1.75E-02 Be-7 <9.62E-02 0.00E+00 9.62E-02 K-40 5.24E-01 1.77E-01 1.37E-01 Sample ID: 486143 Sample Dates: 10/1/2018 - 10/8/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.20E-02 0.00E+00 2.20E-02 Cs-134 <1.83E-02 0.00E+00 1.83E-02 Cs-137 <1.44E-02 0.00E+00 1.44E-02 Be-7 <1.28E-01 0.00E+00 1.28E-01 K-40 6.71E-01 2.13E-01 1.67E-01 Sample ID: 486689 Sample Dates: 10/8/2018 - 10/15/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.83E-02 0.00E+00 2.83E-02 Cs-134 <1.77E-02 0.00E+00 1.77E-02 Cs-137 <1.51E-02 0.00E+00 1.51E-02 Be-7 <1.13E-01 0.00E+00 1.13E-01 K-40 4.87E-01 1.86E-01 1.89E-01 Sample ID: 487728 Sample Dates: 10/15/2018 - 10/22/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.59E-02 0.00E+00 2.59E-02 Cs-134 <1.94E-02 0.00E+00 1.94E-02 Cs-137 <1.49E-02 0.00E+00 1.49E-02 Be-7 <9.19E-02 0.00E+00 9.19E-02 K-40 4.70E-01 1.81E-01 1.74E-01 Sample ID: 487975 Sample Dates: 10/22/2018 - 10/29/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.75E-02 0.00E+00 1.75E-02 Cs-134 <1.80E-02 0.00E+00 1.80E-02 Cs-137 <1.89E-02 0.00E+00 1.89E-02 Be-7 <1.36E-01 0.00E+00 1.36E-01 K-40 5.55E-01 2.01E-01 2.08E-01 Sample ID: 488460 Sample Dates: 10/29/2018 - 11/5/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.17E-02 0.00E+00 2.17E-02 Cs-134 <2.01E-02 0.00E+00 2.01E-02 Cs-137 <1.96E-02 0.00E+00 1.96E-02 Be-7 <1.32E-01 0.00E+00 1.32E-01 K-40 3.43E-01 1.62E-01 1.77E-01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 65 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 90 Sample Point 90 [ INDICATOR - SSW @ 0.5 miles ]

Sample ID: 488836 Sample Dates: 11/5/2018 - 11/12/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.18E-02 0.00E+00 2.18E-02 Cs-134 <1.58E-02 0.00E+00 1.58E-02 Cs-137 <1.63E-02 0.00E+00 1.63E-02 Be-7 <1.29E-01 0.00E+00 1.29E-01 K-40 3.30E-01 1.67E-01 2.03E-01 Sample ID: 489140 Sample Dates: 11/12/2018 - 11/19/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.14E-02 0.00E+00 1.14E-02 Cs-134 <7.47E-03 0.00E+00 7.47E-03 Cs-137 <6.76E-03 0.00E+00 6.76E-03 Be-7 <5.17E-02 0.00E+00 5.17E-02 K-40 2.81E-01 8.11E-02 9.34E-02 Sample ID: 489725 Sample Dates: 11/19/2018 - 11/26/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.12E-02 0.00E+00 2.12E-02 Cs-134 <1.39E-02 0.00E+00 1.39E-02 Cs-137 <1.63E-02 0.00E+00 1.63E-02 Be-7 <1.24E-01 0.00E+00 1.24E-01 K-40 4.54E-01 1.79E-01 1.85E-01 Sample ID: 490141 Sample Dates: 11/26/2018 - 12/3/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.42E-02 0.00E+00 2.42E-02 Cs-134 <1.57E-02 0.00E+00 1.57E-02 Cs-137 <1.59E-02 0.00E+00 1.59E-02 Be-7 2.03E-02 7.97E-02 1.42E-01 K-40 2.89E-01 1.37E-01 1.54E-01 Sample ID: 490787 Sample Dates: 12/3/2018 - 12/11/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.08E-02 0.00E+00 2.08E-02 Cs-134 <1.58E-02 0.00E+00 1.58E-02 Cs-137 <1.43E-02 0.00E+00 1.43E-02 Be-7 <1.08E-01 0.00E+00 1.08E-01 K-40 4.15E-01 1.40E-01 3.04E-02 Sample ID: 491167 Sample Dates: 12/11/2018 - 12/18/2018 Nuclide Activity 2 Sigma Error MDA I-131 <3.43E-02 0.00E+00 3.43E-02 Cs-134 <1.38E-02 0.00E+00 1.38E-02 Cs-137 <1.63E-02 0.00E+00 1.63E-02 Be-7 <1.20E-01 0.00E+00 1.20E-01 K-40 4.66E-01 2.04E-01 2.48E-01 Sample ID: 491471 Sample Dates: 12/18/2018 - 12/26/2018 Nuclide Activity 2 Sigma Error MDA I-131 <3.05E-02 0.00E+00 3.05E-02 Cs-134 <1.42E-02 0.00E+00 1.42E-02 Cs-137 <1.39E-02 0.00E+00 1.39E-02 Be-7 <1.27E-01 0.00E+00 1.27E-01 K-40 4.67E-01 1.58E-01 1.23E-01 Sample ID: 491736 Sample Dates: 12/26/2018 - 12/31/2018 Nuclide Activity 2 Sigma Error MDA I-131 <5.39E-02 0.00E+00 5.39E-02 Cs-134 <2.13E-02 0.00E+00 2.13E-02 Cs-137 <2.43E-02 0.00E+00 2.43E-02 Be-7 <1.81E-01 0.00E+00 1.81E-01 K-40 6.51E-01 3.03E-01 3.79E-01 Sample Point 91 [ INDICATOR - ENE @ 1.6 miles ]

Sample ID: 465981 Sample Dates: 1/2/2018 - 1/8/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.80E-02 0.00E+00 2.80E-02 Cs-134 <1.51E-02 0.00E+00 1.51E-02 Cs-137 <1.91E-02 0.00E+00 1.91E-02 Be-7 <1.24E-01 0.00E+00 1.24E-01 K-40 4.48E-01 1.67E-01 4.05E-02 Sample ID: 466181 Sample Dates: 1/8/2018 - 1/15/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.47E-02 0.00E+00 2.47E-02 Cs-134 <1.44E-02 0.00E+00 1.44E-02 Cs-137 <1.36E-02 0.00E+00 1.36E-02 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 66 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 91 Sample Point 91 [ INDICATOR - ENE @ 1.6 miles ]

Sample ID: 466181 Sample Dates: 1/8/2018 - 1/15/2018 Nuclide Activity 2 Sigma Error MDA Be-7 <1.38E-01 0.00E+00 1.38E-01 K-40 5.10E-01 2.02E-01 2.23E-01 Sample ID: 466379 Sample Dates: 1/15/2018 - 1/22/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.55E-02 0.00E+00 2.55E-02 Cs-134 <1.66E-02 0.00E+00 1.66E-02 Cs-137 <1.71E-02 0.00E+00 1.71E-02 Be-7 <1.23E-01 0.00E+00 1.23E-01 K-40 5.81E-01 1.92E-01 1.64E-01 Sample ID: 466967 Sample Dates: 1/22/2018 - 1/29/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.46E-02 0.00E+00 2.46E-02 Cs-134 <1.96E-02 0.00E+00 1.96E-02 Cs-137 <1.83E-02 0.00E+00 1.83E-02 Be-7 <1.30E-01 0.00E+00 1.30E-01 K-40 <4.14E-01 0.00E+00 4.14E-01 Sample ID: 467326 Sample Dates: 1/29/2018 - 2/5/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.46E-02 0.00E+00 2.46E-02 Cs-134 <2.03E-02 0.00E+00 2.03E-02 Cs-137 <1.73E-02 0.00E+00 1.73E-02 Be-7 <1.51E-01 0.00E+00 1.51E-01 K-40 4.96E-01 1.97E-01 2.16E-01 Sample ID: 467635 Sample Dates: 2/5/2018 - 2/12/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.89E-02 0.00E+00 1.89E-02 Cs-134 <1.60E-02 0.00E+00 1.60E-02 Cs-137 <1.60E-02 0.00E+00 1.60E-02 Be-7 <1.10E-01 0.00E+00 1.10E-01 K-40 6.20E-01 1.94E-01 1.32E-01 Sample ID: 468427 Sample Dates: 2/12/2018 - 2/19/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.33E-02 0.00E+00 2.33E-02 Cs-134 <1.37E-02 0.00E+00 1.37E-02 Cs-137 <1.65E-02 0.00E+00 1.65E-02 Be-7 <1.12E-01 0.00E+00 1.12E-01 K-40 3.85E-01 1.57E-01 1.48E-01 Sample ID: 468748 Sample Dates: 2/19/2018 - 2/26/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.24E-02 0.00E+00 2.24E-02 Cs-134 <1.76E-02 0.00E+00 1.76E-02 Cs-137 <1.79E-02 0.00E+00 1.79E-02 Be-7 <1.24E-01 0.00E+00 1.24E-01 K-40 5.28E-01 1.74E-01 3.67E-02 Sample ID: 469560 Sample Dates: 2/26/2018 - 3/5/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.34E-02 0.00E+00 2.34E-02 Cs-134 <2.12E-02 0.00E+00 2.12E-02 Cs-137 <1.46E-02 0.00E+00 1.46E-02 Be-7 <1.12E-01 0.00E+00 1.12E-01 K-40 3.86E-01 1.75E-01 2.00E-01 Sample ID: 470582 Sample Dates: 3/5/2018 - 3/12/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.38E-02 0.00E+00 2.38E-02 Cs-134 <2.12E-02 0.00E+00 2.12E-02 Cs-137 <1.85E-02 0.00E+00 1.85E-02 Be-7 <1.26E-01 0.00E+00 1.26E-01 K-40 4.51E-01 1.72E-01 1.50E-01 Sample ID: 471149 Sample Dates: 3/12/2018 - 3/19/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.31E-02 0.00E+00 2.31E-02 Cs-134 <1.53E-02 0.00E+00 1.53E-02 Cs-137 <1.42E-02 0.00E+00 1.42E-02 Be-7 <1.15E-01 0.00E+00 1.15E-01 K-40 4.21E-01 1.69E-01 1.69E-01 Sample ID: 471704 Sample Dates: 3/19/2018 - 3/26/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.28E-02 0.00E+00 2.28E-02 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 67 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 91 Sample Point 91 [ INDICATOR - ENE @ 1.6 miles ]

Sample ID: 471704 Sample Dates: 3/19/2018 - 3/26/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.82E-02 0.00E+00 1.82E-02 Cs-137 <2.19E-02 0.00E+00 2.19E-02 Be-7 <1.20E-01 0.00E+00 1.20E-01 K-40 4.35E-01 2.07E-01 2.58E-01 Sample ID: 472491 Sample Dates: 3/26/2018 - 4/2/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.12E-02 0.00E+00 2.12E-02 Cs-134 <2.39E-02 0.00E+00 2.39E-02 Cs-137 <1.73E-02 0.00E+00 1.73E-02 Be-7 <1.36E-01 0.00E+00 1.36E-01 K-40 2.57E-01 1.65E-01 2.27E-01 Sample ID: 472966 Sample Dates: 4/2/2018 - 4/9/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.19E-02 0.00E+00 2.19E-02 Cs-134 <2.06E-02 0.00E+00 2.06E-02 Cs-137 <1.80E-02 0.00E+00 1.80E-02 Be-7 <1.17E-01 0.00E+00 1.17E-01 K-40 4.45E-01 1.64E-01 1.22E-01 Sample ID: 473257 Sample Dates: 4/9/2018 - 4/16/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.90E-02 0.00E+00 1.90E-02 Cs-134 <1.52E-02 0.00E+00 1.52E-02 Cs-137 <1.75E-02 0.00E+00 1.75E-02 Be-7 <1.34E-01 0.00E+00 1.34E-01 K-40 5.02E-01 1.62E-01 3.32E-02 Sample ID: 473622 Sample Dates: 4/16/2018 - 4/23/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.19E-02 0.00E+00 2.19E-02 Cs-134 <2.00E-02 0.00E+00 2.00E-02 Cs-137 <1.60E-02 0.00E+00 1.60E-02 Be-7 <1.34E-01 0.00E+00 1.34E-01 K-40 5.14E-01 1.82E-01 1.41E-01 Sample ID: 474142 Sample Dates: 4/23/2018 - 4/30/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.47E-02 0.00E+00 2.47E-02 Cs-134 <1.88E-02 0.00E+00 1.88E-02 Cs-137 <1.70E-02 0.00E+00 1.70E-02 Be-7 <1.21E-01 0.00E+00 1.21E-01 K-40 5.51E-01 2.08E-01 2.24E-01 Sample ID: 474520 Sample Dates: 4/30/2018 - 5/7/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.39E-02 0.00E+00 2.39E-02 Cs-134 <1.86E-02 0.00E+00 1.86E-02 Cs-137 <1.48E-02 0.00E+00 1.48E-02 Be-7 <9.44E-02 0.00E+00 9.44E-02 K-40 <3.77E-01 0.00E+00 3.77E-01 Sample ID: 474879 Sample Dates: 5/7/2018 - 5/14/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.26E-02 0.00E+00 2.26E-02 Cs-134 <1.96E-02 0.00E+00 1.96E-02 Cs-137 <1.96E-02 0.00E+00 1.96E-02 Be-7 <1.23E-01 0.00E+00 1.23E-01 K-40 4.51E-01 1.78E-01 1.84E-01 Sample ID: 475203 Sample Dates: 5/14/2018 - 5/21/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.87E-02 0.00E+00 1.87E-02 Cs-134 <1.82E-02 0.00E+00 1.82E-02 Cs-137 <1.82E-02 0.00E+00 1.82E-02 Be-7 <1.43E-01 0.00E+00 1.43E-01 K-40 3.13E-01 1.98E-01 2.80E-01 Sample ID: 475528 Sample Dates: 5/21/2018 - 5/29/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.15E-02 0.00E+00 2.15E-02 Cs-134 <1.39E-02 0.00E+00 1.39E-02 Cs-137 <1.56E-02 0.00E+00 1.56E-02 Be-7 <1.01E-01 0.00E+00 1.01E-01 K-40 3.93E-01 1.55E-01 1.54E-01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 68 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 91 Sample Point 91 [ INDICATOR - ENE @ 1.6 miles ]

Sample ID: 476353 Sample Dates: 5/29/2018 - 6/4/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.77E-02 0.00E+00 2.77E-02 Cs-134 <2.59E-02 0.00E+00 2.59E-02 Cs-137 <1.83E-02 0.00E+00 1.83E-02 Be-7 <1.44E-01 0.00E+00 1.44E-01 K-40 6.51E-01 2.14E-01 1.51E-01 Sample ID: 477365 Sample Dates: 6/4/2018 - 6/11/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.28E-02 0.00E+00 2.28E-02 Cs-134 <1.76E-02 0.00E+00 1.76E-02 Cs-137 <1.50E-02 0.00E+00 1.50E-02 Be-7 <1.12E-01 0.00E+00 1.12E-01 K-40 3.98E-01 1.72E-01 1.88E-01 Sample ID: 478095 Sample Dates: 6/11/2018 - 6/18/2018 Nuclide Activity 2 Sigma Error MDA I-131 <3.81E-02 0.00E+00 3.81E-02 Cs-134 <2.21E-02 0.00E+00 2.21E-02 Cs-137 <1.92E-02 0.00E+00 1.92E-02 Be-7 <1.26E-01 0.00E+00 1.26E-01 K-40 3.77E-01 1.73E-01 1.91E-01 Sample ID: 478415 Sample Dates: 6/18/2018 - 6/25/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.51E-02 0.00E+00 2.51E-02 Cs-134 <1.66E-02 0.00E+00 1.66E-02 Cs-137 <1.86E-02 0.00E+00 1.86E-02 Be-7 <1.17E-01 0.00E+00 1.17E-01 K-40 5.35E-01 1.70E-01 3.45E-02 Sample ID: 478775 Sample Dates: 6/25/2018 - 7/2/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.91E-02 0.00E+00 1.91E-02 Cs-134 <1.92E-02 0.00E+00 1.92E-02 Cs-137 <1.48E-02 0.00E+00 1.48E-02 Be-7 <1.21E-01 0.00E+00 1.21E-01 K-40 3.52E-01 1.64E-01 1.83E-01 Sample ID: 479047 Sample Dates: 7/2/2018 - 7/9/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.14E-02 0.00E+00 2.14E-02 Cs-134 <1.89E-02 0.00E+00 1.89E-02 Cs-137 <1.84E-02 0.00E+00 1.84E-02 Be-7 <1.27E-01 0.00E+00 1.27E-01 K-40 5.40E-01 1.95E-01 1.90E-01 Sample ID: 479868 Sample Dates: 7/9/2018 - 7/16/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.21E-02 0.00E+00 2.21E-02 Cs-134 <1.71E-02 0.00E+00 1.71E-02 Cs-137 <1.58E-02 0.00E+00 1.58E-02 Be-7 <1.14E-01 0.00E+00 1.14E-01 K-40 3.72E-01 1.55E-01 1.36E-01 Sample ID: 480238 Sample Dates: 7/16/2018 - 7/23/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.45E-02 0.00E+00 2.45E-02 Cs-134 <1.85E-02 0.00E+00 1.85E-02 Cs-137 <1.29E-02 0.00E+00 1.29E-02 Be-7 <1.15E-01 0.00E+00 1.15E-01 K-40 6.50E-01 2.09E-01 1.80E-01 Sample ID: 481065 Sample Dates: 7/23/2018 - 7/30/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.37E-02 0.00E+00 2.37E-02 Cs-134 <1.88E-02 0.00E+00 1.88E-02 Cs-137 <1.75E-02 0.00E+00 1.75E-02 Be-7 <1.25E-01 0.00E+00 1.25E-01 K-40 5.64E-01 2.30E-01 2.78E-01 Sample ID: 481509 Sample Dates: 7/30/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.19E-02 0.00E+00 2.19E-02 Cs-134 <1.93E-02 0.00E+00 1.93E-02 Cs-137 <1.90E-02 0.00E+00 1.90E-02 Be-7 <1.18E-01 0.00E+00 1.18E-01 K-40 3.98E-01 1.71E-01 1.85E-01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 69 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 91 Sample Point 91 [ INDICATOR - ENE @ 1.6 miles ]

Sample ID: 481942 Sample Dates: 8/6/2018 - 8/13/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.79E-02 0.00E+00 1.79E-02 Cs-134 <1.64E-02 0.00E+00 1.64E-02 Cs-137 <1.69E-02 0.00E+00 1.69E-02 Be-7 <1.15E-01 0.00E+00 1.15E-01 K-40 4.17E-01 1.74E-01 1.75E-01 Sample ID: 482474 Sample Dates: 8/13/2018 - 8/20/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.68E-02 0.00E+00 1.68E-02 Cs-134 <1.53E-02 0.00E+00 1.53E-02 Cs-137 <1.32E-02 0.00E+00 1.32E-02 Be-7 <9.87E-02 0.00E+00 9.87E-02 K-40 1.98E-01 1.46E-01 2.06E-01 Sample ID: 482799 Sample Dates: 8/20/2018 - 8/27/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.85E-02 0.00E+00 1.85E-02 Cs-134 <1.83E-02 0.00E+00 1.83E-02 Cs-137 <1.33E-02 0.00E+00 1.33E-02 Be-7 <8.45E-02 0.00E+00 8.45E-02 K-40 6.28E-01 1.84E-01 3.40E-02 Sample ID: 483424 Sample Dates: 8/27/2018 - 9/4/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.14E-02 0.00E+00 2.14E-02 Cs-134 <1.42E-02 0.00E+00 1.42E-02 Cs-137 <1.56E-02 0.00E+00 1.56E-02 Be-7 <9.96E-02 0.00E+00 9.96E-02 K-40 <2.95E-01 0.00E+00 2.95E-01 Sample ID: 483999 Sample Dates: 9/4/2018 - 9/10/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.21E-02 0.00E+00 2.21E-02 Cs-134 <1.82E-02 0.00E+00 1.82E-02 Cs-137 <1.47E-02 0.00E+00 1.47E-02 Be-7 <1.47E-01 0.00E+00 1.47E-01 K-40 4.76E-01 2.34E-01 2.96E-01 Sample ID: 484169 Sample Dates: 9/10/2018 - 9/17/2018 Nuclide Activity 2 Sigma Error MDA I-131 <3.86E-02 0.00E+00 3.86E-02 Cs-134 <1.67E-02 0.00E+00 1.67E-02 Cs-137 <1.91E-02 0.00E+00 1.91E-02 Be-7 <1.33E-01 0.00E+00 1.33E-01 K-40 5.31E-01 1.85E-01 1.55E-01 Sample ID: 485020 Sample Dates: 9/17/2018 - 9/24/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.31E-02 0.00E+00 2.31E-02 Cs-134 <1.36E-02 0.00E+00 1.36E-02 Cs-137 <1.65E-02 0.00E+00 1.65E-02 Be-7 <1.26E-01 0.00E+00 1.26E-01 K-40 6.45E-01 2.07E-01 1.72E-01 Sample ID: 485250 Sample Dates: 9/24/2018 - 10/1/2018 Nuclide Activity 2 Sigma Error MDA I-131 <3.02E-02 0.00E+00 3.02E-02 Cs-134 <1.60E-02 0.00E+00 1.60E-02 Cs-137 <1.95E-02 0.00E+00 1.95E-02 Be-7 <1.11E-01 0.00E+00 1.11E-01 K-40 4.94E-01 1.68E-01 1.17E-01 Sample ID: 486144 Sample Dates: 10/1/2018 - 10/8/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.20E-02 0.00E+00 2.20E-02 Cs-134 <1.68E-02 0.00E+00 1.68E-02 Cs-137 <1.78E-02 0.00E+00 1.78E-02 Be-7 <1.39E-01 0.00E+00 1.39E-01 K-40 4.47E-01 1.71E-01 1.40E-01 Sample ID: 486690 Sample Dates: 10/8/2018 - 10/15/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.35E-02 0.00E+00 2.35E-02 Cs-134 <1.66E-02 0.00E+00 1.67E-02 Cs-137 <1.74E-02 0.00E+00 1.74E-02 Be-7 <1.27E-01 0.00E+00 1.27E-01 K-40 5.37E-01 1.85E-01 1.53E-01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 70 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 91 Sample Point 91 [ INDICATOR - ENE @ 1.6 miles ]

Sample ID: 487729 Sample Dates: 10/15/2018 - 10/22/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.45E-02 0.00E+00 2.45E-02 Cs-134 <2.10E-02 0.00E+00 2.10E-02 Cs-137 <1.93E-02 0.00E+00 1.93E-02 Be-7 <1.32E-01 0.00E+00 1.32E-01 K-40 4.72E-01 1.87E-01 1.92E-01 Sample ID: 487976 Sample Dates: 10/22/2018 - 10/29/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.28E-02 0.00E+00 2.28E-02 Cs-134 <1.72E-02 0.00E+00 1.72E-02 Cs-137 <1.66E-02 0.00E+00 1.66E-02 Be-7 <1.14E-01 0.00E+00 1.14E-01 K-40 3.98E-01 1.68E-01 1.77E-01 Sample ID: 488461 Sample Dates: 10/29/2018 - 11/5/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.34E-02 0.00E+00 2.34E-02 Cs-134 <1.68E-02 0.00E+00 1.68E-02 Cs-137 <1.36E-02 0.00E+00 1.36E-02 Be-7 <1.39E-01 0.00E+00 1.39E-01 K-40 6.07E-01 2.20E-01 2.25E-01 Sample ID: 488837 Sample Dates: 11/5/2018 - 11/12/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.28E-02 0.00E+00 2.28E-02 Cs-134 <1.15E-02 0.00E+00 1.15E-02 Cs-137 <1.91E-02 0.00E+00 1.91E-02 Be-7 <1.02E-01 0.00E+00 1.02E-01 K-40 4.12E-01 1.72E-01 1.76E-01 Sample ID: 489141 Sample Dates: 11/12/2018 - 11/19/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.46E-02 0.00E+00 1.46E-02 Cs-134 <7.36E-03 0.00E+00 7.36E-03 Cs-137 <6.22E-03 0.00E+00 6.22E-03 Be-7 <4.87E-02 0.00E+00 4.87E-02 K-40 3.97E-01 9.69E-02 1.05E-01 Sample ID: 489726 Sample Dates: 11/19/2018 - 11/26/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.45E-02 0.00E+00 2.45E-02 Cs-134 <1.79E-02 0.00E+00 1.79E-02 Cs-137 <1.75E-02 0.00E+00 1.75E-02 Be-7 <1.18E-01 0.00E+00 1.18E-01 K-40 4.63E-01 1.89E-01 2.12E-01 Sample ID: 490142 Sample Dates: 11/26/2018 - 12/3/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.03E-02 0.00E+00 2.03E-02 Cs-134 <1.67E-02 0.00E+00 1.67E-02 Cs-137 <1.10E-02 0.00E+00 1.10E-02 Be-7 <1.13E-01 0.00E+00 1.13E-01 K-40 <3.61E-01 0.00E+00 3.61E-01 Sample ID: 490788 Sample Dates: 12/3/2018 - 12/11/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.37E-02 0.00E+00 2.37E-02 Cs-134 <1.52E-02 0.00E+00 1.52E-02 Cs-137 <1.52E-02 0.00E+00 1.52E-02 Be-7 <9.04E-02 0.00E+00 9.04E-02 K-40 5.41E-01 1.80E-01 1.63E-01 Sample ID: 491168 Sample Dates: 12/11/2018 - 12/18/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.78E-02 0.00E+00 2.78E-02 Cs-134 <1.34E-02 0.00E+00 1.34E-02 Cs-137 <1.42E-02 0.00E+00 1.42E-02 Be-7 <9.49E-02 0.00E+00 9.49E-02 K-40 2.23E-01 1.17E-01 1.17E-01 Sample ID: 491472 Sample Dates: 12/18/2018 - 12/26/2018 Nuclide Activity 2 Sigma Error MDA I-131 <3.20E-02 0.00E+00 3.20E-02 Cs-134 <1.22E-02 0.00E+00 1.22E-02 Cs-137 <1.62E-02 0.00E+00 1.61E-02 Be-7 <1.19E-01 0.00E+00 1.19E-01 K-40 3.67E-01 1.89E-01 2.57E-01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 71 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 91 Sample Point 91 [ INDICATOR - ENE @ 1.6 miles ]

Sample ID: 491737 Sample Dates: 12/26/2018 - 12/31/2018 Nuclide Activity 2 Sigma Error MDA I-131 <4.32E-02 0.00E+00 4.32E-02 Cs-134 <2.90E-02 0.00E+00 2.90E-02 Cs-137 <2.04E-02 0.00E+00 2.04E-02 Be-7 <2.03E-01 0.00E+00 2.03E-01 K-40 7.11E-01 2.75E-01 2.72E-01 Media Type: AQUATIC VEGETATION Concentration (Activity): pCi/kg wet 26 Sample Point 26 [ INDICATOR - S @ 4.7 miles ]

Sample ID: 486133 Sample Dates: 10/1/2018 - 10/1/2018 ALLIWEED Nuclide Activity 2 Sigma Error MDA Mn-54 <1.75E+01 0.00E+00 1.75E+01 Co-58 <2.32E+01 0.00E+00 2.32E+01 Fe-59 <4.25E+01 0.00E+00 4.25E+01 Co-60 <1.66E+01 0.00E+00 1.66E+01 Zn-65 <4.73E+01 0.00E+00 4.73E+01 Zr-95 <3.14E+01 0.00E+00 3.14E+01 Nb-95 <1.84E+01 0.00E+00 1.84E+01 I-131 <2.88E+01 0.00E+00 2.88E+01 Cs-134 <2.60E+01 0.00E+00 2.60E+01 Cs-137 <1.67E+01 0.00E+00 1.67E+01 BaLa-140 <2.88E+01 0.00E+00 2.88E+01 Be-7 <2.27E+02 0.00E+00 2.27E+02 K-40 3.87E+03 6.58E+02 4.30E+02 Sample Point 41 [ INDICATOR - S @ 3.8 miles ]

Sample ID: 486134 Sample Dates: 10/1/2018 - 10/1/2018 LYNGBYA Nuclide Activity 2 Sigma Error MDA Mn-54 <9.37E+00 0.00E+00 9.37E+00 Co-58 <8.88E+00 0.00E+00 8.88E+00 Fe-59 <1.61E+01 0.00E+00 1.61E+01 Co-60 <1.63E+01 0.00E+00 1.63E+01 Zn-65 <3.16E+01 0.00E+00 3.16E+01 Zr-95 <2.42E+01 0.00E+00 2.42E+01 Nb-95 <1.42E+01 0.00E+00 1.42E+01 I-131 <1.82E+01 0.00E+00 1.82E+01 Cs-134 <1.39E+01 0.00E+00 1.39E+01 Cs-137 8.31E+00 7.02E+00 1.02E+01 BaLa-140 <1.91E+01 0.00E+00 1.91E+01 Be-7 5.84E+02 1.38E+02 1.32E+02 K-40 4.17E+02 1.79E+02 2.22E+02 Sample Point 61 [ CONTROL - E @ 2.5 miles ]

Sample ID: 486135 Sample Dates: 10/1/2018 - 10/1/2018 HYDRILLA Nuclide Activity 2 Sigma Error MDA Mn-54 <1.68E+01 0.00E+00 1.68E+01 Co-58 <1.55E+01 0.00E+00 1.55E+01 Fe-59 <1.94E+01 0.00E+00 1.94E+01 Co-60 <1.49E+01 0.00E+00 1.49E+01 Zn-65 <3.29E+01 0.00E+00 3.29E+01 Zr-95 <2.70E+01 0.00E+00 2.70E+01 Nb-95 <1.65E+01 0.00E+00 1.65E+01 I-131 <1.81E+01 0.00E+00 1.81E+01 Cs-134 <1.60E+01 0.00E+00 1.60E+01 Cs-137 <1.44E+01 0.00E+00 1.44E+01 BaLa-140 <2.32E+01 0.00E+00 2.32E+01 Be-7 2.74E+02 1.15E+02 1.47E+02 K-40 2.55E+03 4.25E+02 2.15E+02 Media Type: CROPS Concentration (Activity): pCi/kg wet 97 Sample Point 97 [ CONTROL - NW @ 19.1 miles ]

Sample ID: 465982 Sample Dates: 1/8/2018 - 1/8/2018 KALE Nuclide Activity 2 Sigma Error MDA I-131 <1.88E+01 0.00E+00 1.88E+01 Cs-134 <2.11E+01 0.00E+00 2.11E+01 Cs-137 <1.62E+01 0.00E+00 1.62E+01 Be-7 <1.85E+02 0.00E+00 1.85E+02 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 72 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: CROPS Concentration (Activity): pCi/kg wet 97 Sample Point 97 [ CONTROL - NW @ 19.1 miles ]

Sample ID: 465982 Sample Dates: 1/8/2018 - 1/8/2018 KALE Nuclide Activity 2 Sigma Error MDA K-40 6.36E+03 7.97E+02 1.78E+02 Sample ID: 465984 Sample Dates: 1/8/2018 - 1/8/2018 LETTUCE Nuclide Activity 2 Sigma Error MDA I-131 <1.80E+01 0.00E+00 1.80E+01 Cs-134 <2.14E+01 0.00E+00 2.14E+01 Cs-137 <1.98E+01 0.00E+00 1.98E+01 Be-7 <1.05E+02 0.00E+00 1.05E+02 K-40 2.60E+03 4.53E+02 2.30E+02 Sample ID: 465983 Sample Dates: 1/8/2018 - 1/8/2018 MUSTGREENS Nuclide Activity 2 Sigma Error MDA I-131 <1.26E+01 0.00E+00 1.26E+01 Cs-134 <1.54E+01 0.00E+00 1.54E+01 Cs-137 <1.47E+01 0.00E+00 1.47E+01 Be-7 <9.46E+01 0.00E+00 9.46E+01 K-40 4.16E+03 5.48E+02 2.98E+02 Sample ID: 467636 Sample Dates: 2/12/2018 - 2/12/2018 ARUGULA Nuclide Activity 2 Sigma Error MDA I-131 <1.91E+01 0.00E+00 1.91E+01 Cs-134 <1.40E+01 0.00E+00 1.40E+01 Cs-137 <1.36E+01 0.00E+00 1.36E+01 Be-7 <1.03E+02 0.00E+00 1.03E+02 K-40 2.89E+03 4.30E+02 1.71E+02 Sample ID: 467637 Sample Dates: 2/12/2018 - 2/12/2018 COLLARDS Nuclide Activity 2 Sigma Error MDA I-131 <2.11E+01 0.00E+00 2.11E+01 Cs-134 <1.90E+01 0.00E+00 1.90E+01 Cs-137 <1.63E+01 0.00E+00 1.63E+01 Be-7 1.58E+02 1.10E+02 1.66E+02 K-40 3.48E+03 5.20E+02 2.36E+02 Sample ID: 467638 Sample Dates: 2/12/2018 - 2/12/2018 KALE Nuclide Activity 2 Sigma Error MDA I-131 <3.28E+01 0.00E+00 3.28E+01 Cs-134 <2.61E+01 0.00E+00 2.61E+01 Cs-137 <2.15E+01 0.00E+00 2.15E+01 Be-7 2.48E+02 1.74E+02 2.64E+02 K-40 4.04E+03 6.71E+02 3.77E+02 Sample ID: 470584 Sample Dates: 3/12/2018 - 3/12/2018 CHARD Nuclide Activity 2 Sigma Error MDA I-131 <4.78E+01 0.00E+00 4.78E+01 Cs-134 <2.78E+01 0.00E+00 2.78E+01 Cs-137 <2.88E+01 0.00E+00 2.88E+01 Be-7 <2.50E+02 0.00E+00 2.50E+02 K-40 3.81E+03 6.97E+02 2.61E+02 Sample ID: 470583 Sample Dates: 3/12/2018 - 3/12/2018 ARUGULA Nuclide Activity 2 Sigma Error MDA I-131 <4.27E+01 0.00E+00 4.27E+01 Cs-134 <2.35E+01 0.00E+00 2.35E+01 Cs-137 <3.16E+01 0.00E+00 3.16E+01 Be-7 <2.64E+02 0.00E+00 2.64E+02 K-40 3.17E+03 7.16E+02 6.39E+02 Sample ID: 470585 Sample Dates: 3/12/2018 - 3/12/2018 KALE Nuclide Activity 2 Sigma Error MDA I-131 <4.58E+01 0.00E+00 4.58E+01 Cs-134 <3.09E+01 0.00E+00 3.09E+01 Cs-137 <4.20E+01 0.00E+00 4.20E+01 Be-7 <3.18E+02 0.00E+00 3.18E+02 K-40 4.70E+03 9.33E+02 7.03E+02 Sample ID: 472967 Sample Dates: 4/9/2018 - 4/9/2018 KALE Nuclide Activity 2 Sigma Error MDA I-131 <4.69E+01 0.00E+00 4.69E+01 Cs-134 <2.82E+01 0.00E+00 2.82E+01 Cs-137 <3.01E+01 0.00E+00 3.01E+01 Be-7 <2.31E+02 0.00E+00 2.31E+02 K-40 4.12E+03 6.75E+02 3.72E+02 Sample ID: 472968 Sample Dates: 4/9/2018 - 4/9/2018 LETTUCE Nuclide Activity 2 Sigma Error MDA I-131 <3.93E+01 0.00E+00 3.93E+01 Cs-134 <2.04E+01 0.00E+00 2.04E+01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 73 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: CROPS Concentration (Activity): pCi/kg wet 97 Sample Point 97 [ CONTROL - NW @ 19.1 miles ]

Sample ID: 472968 Sample Dates: 4/9/2018 - 4/9/2018 LETTUCE Nuclide Activity 2 Sigma Error MDA Cs-137 <2.71E+01 0.00E+00 2.71E+01 Be-7 <2.69E+02 0.00E+00 2.69E+02 K-40 1.57E+03 4.33E+02 2.74E+02 Sample ID: 472969 Sample Dates: 4/9/2018 - 4/9/2018 PARSLEY Nuclide Activity 2 Sigma Error MDA I-131 <2.24E+01 0.00E+00 2.24E+01 Cs-134 <3.86E+01 0.00E+00 3.86E+01 Cs-137 <3.51E+01 0.00E+00 3.51E+01 Be-7 <1.90E+02 0.00E+00 1.90E+02 K-40 4.23E+03 7.81E+02 5.00E+02 Sample ID: 474883 Sample Dates: 5/7/2018 - 5/7/2018 ARUGULA Nuclide Activity 2 Sigma Error MDA I-131 <1.59E+01 0.00E+00 1.59E+01 Cs-134 <1.68E+01 0.00E+00 1.68E+01 Cs-137 <1.55E+01 0.00E+00 1.55E+01 Be-7 <1.38E+02 0.00E+00 1.38E+02 K-40 3.95E+03 5.43E+02 2.18E+02 Sample ID: 474884 Sample Dates: 5/7/2018 - 5/7/2018 CHARD Nuclide Activity 2 Sigma Error MDA I-131 <1.49E+01 0.00E+00 1.49E+01 Cs-134 <1.66E+01 0.00E+00 1.66E+01 Cs-137 <2.08E+01 0.00E+00 2.08E+01 Be-7 <1.15E+02 0.00E+00 1.15E+02 K-40 2.47E+03 4.43E+02 2.88E+02 Sample ID: 474885 Sample Dates: 5/7/2018 - 5/7/2018 LETTUCE Nuclide Activity 2 Sigma Error MDA I-131 <2.20E+01 0.00E+00 2.20E+01 Cs-134 <2.62E+01 0.00E+00 2.62E+01 Cs-137 <2.48E+01 0.00E+00 2.48E+01 Be-7 <1.94E+02 0.00E+00 1.94E+02 K-40 1.83E+03 4.25E+02 5.89E+01 Sample ID: 477369 Sample Dates: 6/4/2018 - 6/4/2018 CABBAGE Nuclide Activity 2 Sigma Error MDA I-131 <1.36E+01 0.00E+00 1.36E+01 Cs-134 <1.46E+01 0.00E+00 1.46E+01 Cs-137 <1.65E+01 0.00E+00 1.65E+01 Be-7 1.29E+01 5.27E+01 9.62E+01 K-40 1.79E+03 3.28E+02 1.44E+02 Sample ID: 477370 Sample Dates: 6/4/2018 - 6/4/2018 CHARD Nuclide Activity 2 Sigma Error MDA I-131 <1.30E+01 0.00E+00 1.30E+01 Cs-134 <1.33E+01 0.00E+00 1.33E+01 Cs-137 <1.36E+01 0.00E+00 1.36E+01 Be-7 2.17E+02 1.20E+02 1.77E+02 K-40 1.69E+03 3.13E+02 1.46E+02 Sample ID: 477371 Sample Dates: 6/4/2018 - 6/4/2018 BOKCHOY Nuclide Activity 2 Sigma Error MDA I-131 <1.12E+01 0.00E+00 1.12E+01 Cs-134 <1.44E+01 0.00E+00 1.44E+01 Cs-137 <1.98E+01 0.00E+00 1.98E+01 Be-7 <1.05E+02 0.00E+00 1.05E+02 K-40 2.66E+03 4.11E+02 2.04E+02 Sample ID: 479051 Sample Dates: 7/2/2018 - 7/2/2018 CABBAGE Nuclide Activity 2 Sigma Error MDA I-131 <1.65E+01 0.00E+00 1.65E+01 Cs-134 <1.28E+01 0.00E+00 1.28E+01 Cs-137 <1.60E+01 0.00E+00 1.60E+01 Be-7 <6.81E+01 0.00E+00 6.81E+01 K-40 1.37E+03 2.71E+02 1.20E+02 Sample ID: 479052 Sample Dates: 7/2/2018 - 7/2/2018 CUCUMBERS Nuclide Activity 2 Sigma Error MDA I-131 <1.43E+01 0.00E+00 1.43E+01 Cs-134 <1.11E+01 0.00E+00 1.11E+01 Cs-137 <1.39E+01 0.00E+00 1.39E+01 Be-7 <5.90E+01 0.00E+00 5.90E+01 K-40 9.46E+02 2.12E+02 1.43E+02 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 74 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: CROPS Concentration (Activity): pCi/kg wet 97 Sample Point 97 [ CONTROL - NW @ 19.1 miles ]

Sample ID: 479053 Sample Dates: 7/2/2018 - 7/2/2018 SQUASH Nuclide Activity 2 Sigma Error MDA I-131 <1.58E+01 0.00E+00 1.58E+01 Cs-134 <1.19E+01 0.00E+00 1.19E+01 Cs-137 <1.13E+01 0.00E+00 1.13E+01 Be-7 <9.98E+01 0.00E+00 9.98E+01 K-40 1.39E+03 2.57E+02 1.52E+02 Sample ID: 481946 Sample Dates: 8/7/2018 - 8/7/2018 ONIONS Nuclide Activity 2 Sigma Error MDA I-131 <1.79E+01 0.00E+00 1.79E+01 Cs-134 <1.41E+01 0.00E+00 1.41E+01 Cs-137 <1.12E+01 0.00E+00 1.12E+01 Be-7 <8.58E+01 0.00E+00 8.58E+01 K-40 1.60E+03 2.91E+02 1.46E+02 Sample ID: 481947 Sample Dates: 8/7/2018 - 8/7/2018 PEPPERS Nuclide Activity 2 Sigma Error MDA I-131 <1.50E+01 0.00E+00 1.50E+01 Cs-134 <1.22E+01 0.00E+00 1.22E+01 Cs-137 <1.09E+01 0.00E+00 1.09E+01 Be-7 <8.57E+01 0.00E+00 8.57E+01 K-40 1.90E+03 3.14E+02 1.50E+02 Sample ID: 481948 Sample Dates: 8/7/2018 - 8/7/2018 TOMATOES Nuclide Activity 2 Sigma Error MDA I-131 <1.67E+01 0.00E+00 1.67E+01 Cs-134 <1.22E+01 0.00E+00 1.22E+01 Cs-137 <8.71E+00 0.00E+00 8.71E+00 Be-7 <8.54E+01 0.00E+00 8.54E+01 K-40 1.34E+03 2.56E+02 1.58E+02 Sample ID: 484003 Sample Dates: 9/10/2018 - 9/10/2018 MIXEDCROPS Nuclide Activity 2 Sigma Error MDA I-131 <1.17E+01 0.00E+00 1.17E+01 Cs-134 <1.12E+01 0.00E+00 1.12E+01 Cs-137 <1.03E+01 0.00E+00 1.03E+01 Be-7 <9.09E+01 0.00E+00 9.09E+01 K-40 1.38E+03 3.01E+02 2.67E+02 Sample ID: 486148 Sample Dates: 10/8/2018 - 10/8/2018 MIXEDCROPS Nuclide Activity 2 Sigma Error MDA I-131 <1.07E+01 0.00E+00 1.07E+01 Cs-134 <1.54E+01 0.00E+00 1.54E+01 Cs-137 <1.44E+01 0.00E+00 1.44E+01 Be-7 5.56E+01 7.25E+01 1.19E+02 K-40 2.26E+03 4.10E+02 3.18E+02 Sample ID: 488838 Sample Dates: 11/5/2018 - 11/5/2018 MIXEDCROPS Nuclide Activity 2 Sigma Error MDA I-131 <1.17E+01 0.00E+00 1.17E+01 Cs-134 <1.39E+01 0.00E+00 1.39E+01 Cs-137 <1.41E+01 0.00E+00 1.41E+01 Be-7 7.70E+01 8.69E+01 1.41E+02 K-40 2.60E+03 3.98E+02 1.83E+02 Sample ID: 490789 Sample Dates: 12/3/2018 - 12/3/2018 MIXEDCROPS Nuclide Activity 2 Sigma Error MDA I-131 <1.47E+01 0.00E+00 1.47E+01 Cs-134 <1.90E+01 0.00E+00 1.90E+01 Cs-137 <1.36E+01 0.00E+00 1.36E+01 Be-7 <1.29E+02 0.00E+00 1.29E+02 K-40 2.46E+03 4.15E+02 3.66E+01 Media Type: DRINKING WATER Concentration (Activity): pCi/l 46 Sample Point 46 [ INDICATOR - SSE @ 17.2 miles ]

Sample ID: 466184 Sample Dates: 12/26/2017 - 1/22/2018 Nuclide Activity 2 Sigma Error MDA Beta 5.15E+00 1.12E+00 1.58E+00 Mn-54 <4.28E+00 0.00E+00 4.28E+00 Co-58 <3.43E+00 0.00E+00 3.43E+00 Fe-59 <7.56E+00 0.00E+00 7.56E+00 Co-60 <3.51E+00 0.00E+00 3.51E+00 Zn-65 <1.05E+01 0.00E+00 1.05E+01 Zr-95 <5.66E+00 0.00E+00 5.66E+00 Nb-95 <4.75E+00 0.00E+00 4.75E+00 I-131 <9.63E+00 0.00E+00 9.63E+00 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 75 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: DRINKING WATER Concentration (Activity): pCi/l 46 Sample Point 46 [ INDICATOR - SSE @ 17.2 miles ]

Sample ID: 466184 Sample Dates: 12/26/2017 - 1/22/2018 Nuclide Activity 2 Sigma Error MDA Cs-134 <2.93E+00 0.00E+00 2.93E+00 Cs-137 <3.87E+00 0.00E+00 3.87E+00 BaLa-140 <1.12E+01 0.00E+00 1.12E+01 Be-7 <4.37E+01 0.00E+00 4.37E+01 K-40 4.65E+01 2.74E+01 3.09E+01 H3DW <-4.5E+01 0.00E+00 1.78E+02 Sample ID: 468752 Sample Dates: 1/22/2018 - 2/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 4.78E+00 1.07E+00 1.52E+00 Mn-54 <3.06E+00 0.00E+00 3.06E+00 Co-58 <1.84E+00 0.00E+00 1.84E+00 Fe-59 <6.65E+00 0.00E+00 6.65E+00 Co-60 <2.74E+00 0.00E+00 2.74E+00 Zn-65 <6.57E+00 0.00E+00 6.57E+00 Zr-95 <5.29E+00 0.00E+00 5.29E+00 Nb-95 <3.38E+00 0.00E+00 3.38E+00 I-131 <1.17E+01 0.00E+00 1.17E+01 Cs-134 <3.13E+00 0.00E+00 3.13E+00 Cs-137 <2.96E+00 0.00E+00 2.96E+00 BaLa-140 <7.63E+00 0.00E+00 7.63E+00 Be-7 <2.74E+01 0.00E+00 2.74E+01 K-40 9.14E+01 3.03E+01 2.81E+01 H3DW <-2.4E+00 0.00E+00 1.85E+02 Sample ID: 471708 Sample Dates: 2/19/2018 - 3/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 3.92E+00 8.76E-01 1.22E+00 Mn-54 <3.38E+00 0.00E+00 3.38E+00 Co-58 <3.76E+00 0.00E+00 3.76E+00 Fe-59 <1.01E+01 0.00E+00 1.01E+01 Co-60 <4.22E+00 0.00E+00 4.22E+00 Zn-65 <8.35E+00 0.00E+00 8.35E+00 Zr-95 <7.10E+00 0.00E+00 7.10E+00 Nb-95 <5.23E+00 0.00E+00 5.23E+00 I-131 <1.19E+01 0.00E+00 1.19E+01 Cs-134 <4.22E+00 0.00E+00 4.22E+00 Cs-137 <3.87E+00 0.00E+00 3.87E+00 BaLa-140 <8.39E+00 0.00E+00 8.39E+00 Be-7 <4.21E+01 0.00E+00 4.21E+01 K-40 4.46E+01 2.41E+01 8.63E+00 H3DW <-1.3E+02 0.00E+00 1.91E+02 Sample ID: 473626 Sample Dates: 3/19/2018 - 4/16/2018 Nuclide Activity 2 Sigma Error MDA Beta 3.53E+00 9.54E-01 1.38E+00 Mn-54 <2.57E+00 0.00E+00 2.57E+00 Co-58 <2.76E+00 0.00E+00 2.76E+00 Fe-59 <6.82E+00 0.00E+00 6.82E+00 Co-60 <3.04E+00 0.00E+00 3.04E+00 Zn-65 <5.87E+00 0.00E+00 5.87E+00 Zr-95 <6.05E+00 0.00E+00 6.05E+00 Nb-95 <3.84E+00 0.00E+00 3.84E+00 I-131 <1.18E+01 0.00E+00 1.18E+01 Cs-134 <3.32E+00 0.00E+00 3.32E+00 Cs-137 <3.11E+00 0.00E+00 3.11E+00 BaLa-140 <5.48E+00 0.00E+00 5.48E+00 Be-7 <2.77E+01 0.00E+00 2.77E+01 K-40 <5.47E+01 0.00E+00 5.47E+01 H3DW <-7.3E+01 0.00E+00 1.74E+02 Sample ID: 475207 Sample Dates: 4/16/2018 - 5/14/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.48E+00 9.95E-01 1.55E+00 Mn-54 <2.70E+00 0.00E+00 2.70E+00 Co-58 <2.66E+00 0.00E+00 2.66E+00 Fe-59 <7.34E+00 0.00E+00 7.34E+00 Co-60 <2.95E+00 0.00E+00 2.95E+00 Zn-65 <4.57E+00 0.00E+00 4.57E+00 Zr-95 <3.83E+00 0.00E+00 3.83E+00 Nb-95 <3.60E+00 0.00E+00 3.60E+00 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 76 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: DRINKING WATER Concentration (Activity): pCi/l 46 Sample Point 46 [ INDICATOR - SSE @ 17.2 miles ]

Sample ID: 475207 Sample Dates: 4/16/2018 - 5/14/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.09E+01 0.00E+00 1.09E+01 Cs-134 <2.46E+00 0.00E+00 2.46E+00 Cs-137 <2.24E+00 0.00E+00 2.24E+00 BaLa-140 <5.46E+00 0.00E+00 5.46E+00 Be-7 <2.41E+01 0.00E+00 2.41E+01 K-40 8.55E+01 2.92E+01 3.48E+01 H3DW <3.76E+01 0.00E+00 1.93E+02 Sample ID: 478099 Sample Dates: 5/14/2018 - 6/11/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.99E+00 8.92E-01 1.33E+00 Mn-54 <2.70E+00 0.00E+00 2.70E+00 Co-58 <3.31E+00 0.00E+00 3.31E+00 Fe-59 <7.62E+00 0.00E+00 7.62E+00 Co-60 <3.03E+00 0.00E+00 3.03E+00 Zn-65 <5.59E+00 0.00E+00 5.59E+00 Zr-95 <5.69E+00 0.00E+00 5.69E+00 Nb-95 <4.03E+00 0.00E+00 4.03E+00 I-131 <1.15E+01 0.00E+00 1.15E+01 Cs-134 <3.20E+00 0.00E+00 3.20E+00 Cs-137 <2.52E+00 0.00E+00 2.52E+00 BaLa-140 <6.45E+00 0.00E+00 6.45E+00 Be-7 <2.85E+01 0.00E+00 2.85E+01 K-40 6.06E+01 3.18E+01 4.31E+01 H3DW <4.96E+01 0.00E+00 1.89E+02 Sample ID: 479873 Sample Dates: 6/11/2018 - 7/9/2018 Nuclide Activity 2 Sigma Error MDA Beta 3.17E+00 1.10E+00 1.69E+00 Mn-54 <2.27E+00 0.00E+00 2.27E+00 Co-58 <2.70E+00 0.00E+00 2.70E+00 Fe-59 <7.10E+00 0.00E+00 7.10E+00 Co-60 <3.21E+00 0.00E+00 3.21E+00 Zn-65 <5.93E+00 0.00E+00 5.93E+00 Zr-95 <5.06E+00 0.00E+00 5.06E+00 Nb-95 <3.68E+00 0.00E+00 3.68E+00 I-131 <1.13E+01 0.00E+00 1.13E+01 Cs-134 <2.98E+00 0.00E+00 2.98E+00 Cs-137 <2.48E+00 0.00E+00 2.48E+00 BaLa-140 <9.60E+00 0.00E+00 9.60E+00 Be-7 <2.70E+01 0.00E+00 2.70E+01 K-40 <4.39E+01 0.00E+00 4.39E+01 H3DW <1.78E+01 0.00E+00 1.81E+02 Sample ID: 481952 Sample Dates: 7/9/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.51E+00 1.15E+00 1.84E+00 Mn-54 <2.28E+00 0.00E+00 2.28E+00 Co-58 <2.44E+00 0.00E+00 2.44E+00 Fe-59 <4.25E+00 0.00E+00 4.25E+00 Co-60 <2.39E+00 0.00E+00 2.39E+00 Zn-65 <4.60E+00 0.00E+00 4.60E+00 Zr-95 <3.94E+00 0.00E+00 3.94E+00 Nb-95 <3.01E+00 0.00E+00 3.01E+00 I-131 <1.15E+01 0.00E+00 1.15E+01 Cs-134 <2.42E+00 0.00E+00 2.42E+00 Cs-137 <1.97E+00 0.00E+00 1.97E+00 BaLa-140 <8.32E+00 0.00E+00 8.32E+00 Be-7 <2.69E+01 0.00E+00 2.69E+01 K-40 3.14E+01 2.19E+01 3.29E+01 H3DW <1.67E+01 0.00E+00 1.88E+02 Sample ID: 484009 Sample Dates: 8/6/2018 - 9/4/2018 Nuclide Activity 2 Sigma Error MDA Beta 4.63E+00 8.96E-01 1.21E+00 Mn-54 <3.14E+00 0.00E+00 3.14E+00 Co-58 <4.01E+00 0.00E+00 4.01E+00 Fe-59 <8.07E+00 0.00E+00 8.07E+00 Co-60 <2.79E+00 0.00E+00 2.79E+00 Zn-65 <3.98E+00 0.00E+00 3.98E+00 Zr-95 <5.45E+00 0.00E+00 5.45E+00 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 77 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: DRINKING WATER Concentration (Activity): pCi/l 46 Sample Point 46 [ INDICATOR - SSE @ 17.2 miles ]

Sample ID: 484009 Sample Dates: 8/6/2018 - 9/4/2018 Nuclide Activity 2 Sigma Error MDA Nb-95 <4.66E+00 0.00E+00 4.66E+00 I-131 <1.19E+01 0.00E+00 1.19E+01 Cs-134 <3.61E+00 0.00E+00 3.61E+00 Cs-137 <3.04E+00 0.00E+00 3.04E+00 BaLa-140 <1.11E+01 0.00E+00 1.11E+01 Be-7 <2.75E+01 0.00E+00 2.75E+01 K-40 <5.41E+01 0.00E+00 5.41E+01 H3DW <3.89E+01 0.00E+00 1.92E+02 Sample ID: 485254 Sample Dates: 9/4/2018 - 10/1/2018 Nuclide Activity 2 Sigma Error MDA Beta 3.09E+00 1.05E+00 1.59E+00 Mn-54 <3.14E+00 0.00E+00 3.14E+00 Co-58 <2.98E+00 0.00E+00 2.98E+00 Fe-59 <7.72E+00 0.00E+00 7.72E+00 Co-60 <3.05E+00 0.00E+00 3.05E+00 Zn-65 <6.62E+00 0.00E+00 6.62E+00 Zr-95 <3.80E+00 0.00E+00 3.80E+00 Nb-95 <3.34E+00 0.00E+00 3.34E+00 I-131 <1.09E+01 0.00E+00 1.09E+01 Cs-134 <3.24E+00 0.00E+00 3.24E+00 Cs-137 <3.75E+00 0.00E+00 3.75E+00 BaLa-140 <1.08E+01 0.00E+00 1.08E+01 Be-7 <2.95E+01 0.00E+00 2.95E+01 K-40 <5.76E+01 0.00E+00 5.76E+01 H3DW <-7.1E+00 0.00E+00 1.95E+02 Sample ID: 488465 Sample Dates: 10/1/2018 - 10/29/2018 Nuclide Activity 2 Sigma Error MDA Beta 3.18E+00 9.60E-01 1.43E+00 Mn-54 <2.90E+00 0.00E+00 2.90E+00 Co-58 <2.96E+00 0.00E+00 2.96E+00 Fe-59 <4.61E+00 0.00E+00 4.61E+00 Co-60 <2.50E+00 0.00E+00 2.50E+00 Zn-65 <5.18E+00 0.00E+00 5.18E+00 Zr-95 <5.08E+00 0.00E+00 5.08E+00 Nb-95 <3.23E+00 0.00E+00 3.23E+00 I-131 <1.17E+01 0.00E+00 1.17E+01 Cs-134 <2.76E+00 0.00E+00 2.76E+00 Cs-137 <2.32E+00 0.00E+00 2.32E+00 BaLa-140 <7.48E+00 0.00E+00 7.48E+00 Be-7 <2.83E+01 0.00E+00 2.83E+01 K-40 3.39E+01 3.28E+01 5.22E+01 H3DW <4.05E+01 0.00E+00 1.90E+02 Sample ID: 490146 Sample Dates: 10/29/2018 - 11/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 3.43E+00 9.43E-01 1.37E+00 Mn-54 <2.89E+00 0.00E+00 2.89E+00 Co-58 <3.07E+00 0.00E+00 3.07E+00 Fe-59 <7.31E+00 0.00E+00 7.31E+00 Co-60 <2.90E+00 0.00E+00 2.90E+00 Zn-65 <4.90E+00 0.00E+00 4.90E+00 Zr-95 <5.44E+00 0.00E+00 5.44E+00 Nb-95 <3.60E+00 0.00E+00 3.60E+00 I-131 <1.14E+01 0.00E+00 1.14E+01 Cs-134 <2.76E+00 0.00E+00 2.76E+00 Cs-137 <3.42E+00 0.00E+00 3.42E+00 BaLa-140 <6.63E+00 0.00E+00 6.63E+00 Be-7 <2.60E+01 0.00E+00 2.60E+01 K-40 5.98E+01 2.80E+01 3.13E+01 H3DW <-2.4E+00 0.00E+00 1.88E+02 Sample ID: 491741 Sample Dates: 11/26/2018 - 12/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.34E+00 8.39E-01 1.29E+00 Mn-54 <1.00E+00 0.00E+00 1.00E+00 Co-58 <1.12E+00 0.00E+00 1.12E+00 Fe-59 <2.44E+00 0.00E+00 2.44E+00 Co-60 <9.91E-01 0.00E+00 9.91E-01 Zn-65 <1.96E+00 0.00E+00 1.96E+00 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 78 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: DRINKING WATER Concentration (Activity): pCi/l 46 Sample Point 46 [ INDICATOR - SSE @ 17.2 miles ]

Sample ID: 491741 Sample Dates: 11/26/2018 - 12/26/2018 Nuclide Activity 2 Sigma Error MDA Zr-95 <2.19E+00 0.00E+00 2.19E+00 Nb-95 <1.76E+00 0.00E+00 1.76E+00 I-131 <9.74E+00 0.00E+00 9.74E+00 Cs-134 <1.11E+00 0.00E+00 1.11E+00 Cs-137 <9.11E-01 0.00E+00 9.11E-01 BaLa-140 <3.66E+00 0.00E+00 3.66E+00 Be-7 <1.09E+01 0.00E+00 1.09E+01 K-40 6.96E+01 1.24E+01 1.30E+01 H3DW <-6.9E+01 0.00E+00 1.94E+02 Sample Point 51 [ INDICATOR - -- @ 0 miles ]

Sample ID: 466970 Sample Dates: 12/26/2017 - 1/22/2018 Nuclide Activity 2 Sigma Error MDA Beta 4.62E+00 1.05E+00 1.50E+00 Mn-54 <2.76E+00 0.00E+00 2.76E+00 Co-58 <3.70E+00 0.00E+00 3.70E+00 Fe-59 <8.78E+00 0.00E+00 8.78E+00 Co-60 <2.62E+00 0.00E+00 2.62E+00 Zn-65 <5.59E+00 0.00E+00 5.59E+00 Zr-95 <6.88E+00 0.00E+00 6.88E+00 Nb-95 <4.72E+00 0.00E+00 4.72E+00 I-131 <1.18E+01 0.00E+00 1.18E+01 Cs-134 <4.56E+00 0.00E+00 4.56E+00 Cs-137 <3.24E+00 0.00E+00 3.24E+00 BaLa-140 <9.08E+00 0.00E+00 9.08E+00 Be-7 <2.59E+01 0.00E+00 2.59E+01 K-40 <5.96E+01 0.00E+00 5.96E+01 H3DW 6.18E+03 2.39E+02 1.77E+02 Sample ID: 468753 Sample Dates: 1/22/2018 - 2/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 4.46E+00 9.37E-01 1.27E+00 Mn-54 <3.13E+00 0.00E+00 3.13E+00 Co-58 <3.79E+00 0.00E+00 3.79E+00 Fe-59 <6.38E+00 0.00E+00 6.38E+00 Co-60 <2.83E+00 0.00E+00 2.83E+00 Zn-65 <5.88E+00 0.00E+00 5.88E+00 Zr-95 <5.64E+00 0.00E+00 5.64E+00 Nb-95 <2.87E+00 0.00E+00 2.87E+00 I-131 <1.17E+01 0.00E+00 1.17E+01 Cs-134 <2.91E+00 0.00E+00 2.91E+00 Cs-137 <3.11E+00 0.00E+00 3.11E+00 BaLa-140 <5.39E+00 0.00E+00 5.39E+00 Be-7 <2.74E+01 0.00E+00 2.74E+01 K-40 <5.16E+01 0.00E+00 5.16E+01 H3DW 3.40E+03 1.93E+02 1.86E+02 Sample ID: 471709 Sample Dates: 2/19/2018 - 3/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 3.88E+00 8.33E-01 1.15E+00 Mn-54 <2.64E+00 0.00E+00 2.64E+00 Co-58 <3.01E+00 0.00E+00 3.01E+00 Fe-59 <6.51E+00 0.00E+00 6.51E+00 Co-60 <2.63E+00 0.00E+00 2.63E+00 Zn-65 <6.49E+00 0.00E+00 6.49E+00 Zr-95 <6.19E+00 0.00E+00 6.19E+00 Nb-95 <3.75E+00 0.00E+00 3.75E+00 I-131 <1.13E+01 0.00E+00 1.13E+01 Cs-134 <3.01E+00 0.00E+00 3.01E+00 Cs-137 <2.78E+00 0.00E+00 2.78E+00 BaLa-140 <6.80E+00 0.00E+00 6.80E+00 Be-7 <2.05E+01 0.00E+00 2.05E+01 K-40 3.23E+01 2.56E+01 3.87E+01 H3DW 2.53E+03 1.77E+02 1.91E+02 Sample ID: 473627 Sample Dates: 3/19/2018 - 4/16/2018 Nuclide Activity 2 Sigma Error MDA Beta 3.85E+00 9.30E-01 1.32E+00 Mn-54 <2.48E+00 0.00E+00 2.48E+00 Co-58 <4.18E+00 0.00E+00 4.18E+00 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 79 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: DRINKING WATER Concentration (Activity): pCi/l 51 Sample Point 51 [ INDICATOR - -- @ 0 miles ]

Sample ID: 473627 Sample Dates: 3/19/2018 - 4/16/2018 Nuclide Activity 2 Sigma Error MDA Fe-59 <1.06E+01 0.00E+00 1.06E+01 Co-60 <5.05E+00 0.00E+00 5.05E+00 Zn-65 <8.64E+00 0.00E+00 8.64E+00 Zr-95 <7.41E+00 0.00E+00 7.41E+00 Nb-95 <4.99E+00 0.00E+00 4.99E+00 I-131 <1.18E+01 0.00E+00 1.18E+01 Cs-134 <5.16E+00 0.00E+00 5.16E+00 Cs-137 <5.21E+00 0.00E+00 5.21E+00 BaLa-140 <1.18E+01 0.00E+00 1.18E+01 Be-7 <3.13E+01 0.00E+00 3.13E+01 K-40 <5.01E+01 0.00E+00 5.01E+01 H3DW 2.40E+03 1.68E+02 1.74E+02 Sample ID: 475208 Sample Dates: 4/16/2018 - 5/14/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.61E+00 9.64E-01 1.48E+00 Mn-54 <2.95E+00 0.00E+00 2.95E+00 Co-58 <3.47E+00 0.00E+00 3.47E+00 Fe-59 <5.54E+00 0.00E+00 5.54E+00 Co-60 <2.41E+00 0.00E+00 2.41E+00 Zn-65 <5.93E+00 0.00E+00 5.93E+00 Zr-95 <4.13E+00 0.00E+00 4.13E+00 Nb-95 <2.30E+00 0.00E+00 2.30E+00 I-131 <1.18E+01 0.00E+00 1.18E+01 Cs-134 <3.61E+00 0.00E+00 3.61E+00 Cs-137 <2.78E+00 0.00E+00 2.78E+00 BaLa-140 <7.51E+00 0.00E+00 7.51E+00 Be-7 <2.39E+01 0.00E+00 2.39E+01 K-40 <4.90E+01 0.00E+00 4.90E+01 H3DW 2.53E+03 1.78E+02 1.93E+02 Sample ID: 478100 Sample Dates: 5/14/2018 - 6/11/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.61E+00 8.42E-01 1.27E+00 Mn-54 <2.72E+00 0.00E+00 2.72E+00 Co-58 <2.49E+00 0.00E+00 2.49E+00 Fe-59 <7.17E+00 0.00E+00 7.17E+00 Co-60 <2.13E+00 0.00E+00 2.13E+00 Zn-65 <8.49E+00 0.00E+00 8.49E+00 Zr-95 <6.78E+00 0.00E+00 6.78E+00 Nb-95 <3.87E+00 0.00E+00 3.87E+00 I-131 <1.18E+01 0.00E+00 1.18E+01 Cs-134 <2.28E+00 0.00E+00 2.28E+00 Cs-137 <3.23E+00 0.00E+00 3.23E+00 BaLa-140 <8.26E+00 0.00E+00 8.26E+00 Be-7 <3.13E+01 0.00E+00 3.13E+01 K-40 3.63E+01 2.79E+01 4.07E+01 H3DW 3.87E+03 2.03E+02 1.89E+02 Sample ID: 479874 Sample Dates: 6/11/2018 - 7/9/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.58E+00 1.03E+00 1.61E+00 Mn-54 <3.76E+00 0.00E+00 3.76E+00 Co-58 <3.65E+00 0.00E+00 3.65E+00 Fe-59 <9.15E+00 0.00E+00 9.15E+00 Co-60 <3.65E+00 0.00E+00 3.65E+00 Zn-65 <7.21E+00 0.00E+00 7.21E+00 Zr-95 <6.13E+00 0.00E+00 6.13E+00 Nb-95 <5.37E+00 0.00E+00 5.37E+00 I-131 <1.19E+01 0.00E+00 1.19E+01 Cs-134 <4.62E+00 0.00E+00 4.62E+00 Cs-137 <4.03E+00 0.00E+00 4.03E+00 BaLa-140 <7.23E+00 0.00E+00 7.23E+00 Be-7 <2.42E+01 0.00E+00 2.42E+01 K-40 <6.19E+01 0.00E+00 6.19E+01 H3DW 3.73E+03 1.94E+02 1.81E+02 Sample ID: 481953 Sample Dates: 7/9/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.98E+00 1.12E+00 1.75E+00 Mn-54 <2.41E+00 0.00E+00 2.41E+00 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 80 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: DRINKING WATER Concentration (Activity): pCi/l 51 Sample Point 51 [ INDICATOR - -- @ 0 miles ]

Sample ID: 481953 Sample Dates: 7/9/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA Co-58 <2.55E+00 0.00E+00 2.55E+00 Fe-59 <6.40E+00 0.00E+00 6.40E+00 Co-60 <1.68E+00 0.00E+00 1.68E+00 Zn-65 <5.07E+00 0.00E+00 5.07E+00 Zr-95 <4.94E+00 0.00E+00 4.94E+00 Nb-95 <3.52E+00 0.00E+00 3.52E+00 I-131 <1.15E+01 0.00E+00 1.15E+01 Cs-134 <2.70E+00 0.00E+00 2.70E+00 Cs-137 <2.26E+00 0.00E+00 2.26E+00 BaLa-140 <6.99E+00 0.00E+00 6.99E+00 Be-7 <2.23E+01 0.00E+00 2.23E+01 K-40 6.80E+01 2.69E+01 3.42E+01 H3DW 3.92E+03 2.05E+02 1.89E+02 Sample ID: 484010 Sample Dates: 8/6/2018 - 9/4/2018 Nuclide Activity 2 Sigma Error MDA Beta 3.34E+00 8.17E-01 1.16E+00 Mn-54 <2.48E+00 0.00E+00 2.48E+00 Co-58 <3.18E+00 0.00E+00 3.18E+00 Fe-59 <5.37E+00 0.00E+00 5.37E+00 Co-60 <2.91E+00 0.00E+00 2.91E+00 Zn-65 <4.97E+00 0.00E+00 4.97E+00 Zr-95 <5.52E+00 0.00E+00 5.52E+00 Nb-95 <3.36E+00 0.00E+00 3.36E+00 I-131 <1.13E+01 0.00E+00 1.13E+01 Cs-134 <3.41E+00 0.00E+00 3.41E+00 Cs-137 <2.81E+00 0.00E+00 2.81E+00 BaLa-140 <7.65E+00 0.00E+00 7.65E+00 Be-7 <2.27E+01 0.00E+00 2.27E+01 K-40 7.28E+01 2.85E+01 3.43E+01 H3DW 3.16E+03 1.92E+02 1.92E+02 Sample ID: 485255 Sample Dates: 9/4/2018 - 10/1/2018 Nuclide Activity 2 Sigma Error MDA Beta 3.24E+00 1.02E+00 1.54E+00 Mn-54 <2.50E+00 0.00E+00 2.50E+00 Co-58 <3.02E+00 0.00E+00 3.02E+00 Fe-59 <4.89E+00 0.00E+00 4.89E+00 Co-60 <3.01E+00 0.00E+00 3.01E+00 Zn-65 <5.33E+00 0.00E+00 5.33E+00 Zr-95 <5.21E+00 0.00E+00 5.21E+00 Nb-95 <3.10E+00 0.00E+00 3.10E+00 I-131 <1.05E+01 0.00E+00 1.05E+01 Cs-134 <2.69E+00 0.00E+00 2.69E+00 Cs-137 <1.92E+00 0.00E+00 1.92E+00 BaLa-140 <6.29E+00 0.00E+00 6.29E+00 Be-7 <2.23E+01 0.00E+00 2.23E+01 K-40 <4.11E+01 0.00E+00 4.11E+01 H3DW 2.68E+03 1.82E+02 1.95E+02 Sample ID: 488466 Sample Dates: 10/1/2018 - 10/29/2018 Nuclide Activity 2 Sigma Error MDA Beta 3.39E+00 9.51E-01 1.40E+00 Mn-54 <2.72E+00 0.00E+00 2.72E+00 Co-58 <3.41E+00 0.00E+00 3.41E+00 Fe-59 <5.62E+00 0.00E+00 5.62E+00 Co-60 <2.84E+00 0.00E+00 2.84E+00 Zn-65 <6.66E+00 0.00E+00 6.66E+00 Zr-95 <5.83E+00 0.00E+00 5.83E+00 Nb-95 <4.09E+00 0.00E+00 4.09E+00 I-131 <1.20E+01 0.00E+00 1.20E+01 Cs-134 <3.96E+00 0.00E+00 3.96E+00 Cs-137 <2.51E+00 0.00E+00 2.51E+00 BaLa-140 <8.42E+00 0.00E+00 8.42E+00 Be-7 <2.13E+01 0.00E+00 2.13E+01 K-40 <4.31E+01 0.00E+00 4.31E+01 H3DW 2.49E+03 1.77E+02 1.91E+02 Sample ID: 490147 Sample Dates: 10/29/2018 - 11/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 4.25E+00 9.73E-01 1.36E+00 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 81 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: DRINKING WATER Concentration (Activity): pCi/l 51 Sample Point 51 [ INDICATOR - -- @ 0 miles ]

Sample ID: 490147 Sample Dates: 10/29/2018 - 11/26/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <2.85E+00 0.00E+00 2.85E+00 Co-58 <3.61E+00 0.00E+00 3.61E+00 Fe-59 <7.08E+00 0.00E+00 7.08E+00 Co-60 <2.22E+00 0.00E+00 2.22E+00 Zn-65 <6.61E+00 0.00E+00 6.61E+00 Zr-95 <6.15E+00 0.00E+00 6.15E+00 Nb-95 <3.35E+00 0.00E+00 3.35E+00 I-131 <1.19E+01 0.00E+00 1.19E+01 Cs-134 <3.61E+00 0.00E+00 3.61E+00 Cs-137 <3.16E+00 0.00E+00 3.16E+00 BaLa-140 <9.24E+00 0.00E+00 9.24E+00 Be-7 <3.07E+01 0.00E+00 3.07E+01 K-40 <4.29E+01 0.00E+00 4.29E+01 H3DW 2.78E+03 1.81E+02 1.87E+02 Sample ID: 491742 Sample Dates: 11/26/2018 - 12/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.67E+00 8.48E-01 1.28E+00 Mn-54 <1.30E+00 0.00E+00 1.30E+00 Co-58 <2.04E+00 0.00E+00 2.04E+00 Fe-59 <4.06E+00 0.00E+00 4.06E+00 Co-60 <1.39E+00 0.00E+00 1.39E+00 Zn-65 <2.97E+00 0.00E+00 2.97E+00 Zr-95 <2.74E+00 0.00E+00 2.74E+00 Nb-95 <2.07E+00 0.00E+00 2.07E+00 I-131 <1.09E+01 0.00E+00 1.09E+01 Cs-134 <1.81E+00 0.00E+00 1.81E+00 Cs-137 <1.48E+00 0.00E+00 1.48E+00 BaLa-140 <5.70E+00 0.00E+00 5.70E+00 Be-7 <1.55E+01 0.00E+00 1.55E+01 K-40 2.70E+01 1.25E+01 1.66E+01 H3DW 2.87E+03 1.87E+02 1.98E+02 Sample Point 58 [ CONTROL - SW @ 8.47 miles ]

Sample ID: 466185 Sample Dates: 12/26/2017 - 1/22/2018 Nuclide Activity 2 Sigma Error MDA Beta 4.91E+00 1.11E+00 1.58E+00 Mn-54 <4.00E+00 0.00E+00 4.00E+00 Co-58 <4.00E+00 0.00E+00 4.00E+00 Fe-59 <7.39E+00 0.00E+00 7.39E+00 Co-60 <2.88E+00 0.00E+00 2.88E+00 Zn-65 <8.18E+00 0.00E+00 8.19E+00 Zr-95 <7.61E+00 0.00E+00 7.61E+00 Nb-95 <5.25E+00 0.00E+00 5.25E+00 I-131 <1.15E+01 0.00E+00 1.15E+01 Cs-134 <3.32E+00 0.00E+00 3.32E+00 Cs-137 <4.22E+00 0.00E+00 4.22E+00 BaLa-140 <7.82E+00 0.00E+00 7.82E+00 Be-7 <3.54E+01 0.00E+00 3.54E+01 K-40 8.82E+01 4.14E+01 5.15E+01 H3DW <-3.3E+01 0.00E+00 1.78E+02 Sample ID: 468754 Sample Dates: 1/22/2018 - 2/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 6.57E+00 1.07E+00 1.33E+00 Mn-54 <2.83E+00 0.00E+00 2.83E+00 Co-58 <3.29E+00 0.00E+00 3.29E+00 Fe-59 <6.64E+00 0.00E+00 6.64E+00 Co-60 <3.14E+00 0.00E+00 3.14E+00 Zn-65 <5.44E+00 0.00E+00 5.44E+00 Zr-95 <5.62E+00 0.00E+00 5.62E+00 Nb-95 <3.86E+00 0.00E+00 3.86E+00 I-131 <1.02E+01 0.00E+00 1.02E+01 Cs-134 <3.26E+00 0.00E+00 3.26E+00 Cs-137 <2.63E+00 0.00E+00 2.63E+00 BaLa-140 <7.32E+00 0.00E+00 7.32E+00 Be-7 <2.24E+01 0.00E+00 2.24E+01 K-40 4.02E+01 2.95E+01 4.34E+01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 82 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: DRINKING WATER Concentration (Activity): pCi/l 58 Sample Point 58 [ CONTROL - SW @ 8.47 miles ]

Sample ID: 468754 Sample Dates: 1/22/2018 - 2/19/2018 Nuclide Activity 2 Sigma Error MDA H3DW <-3.1E+01 0.00E+00 1.85E+02 Sample ID: 471710 Sample Dates: 2/19/2018 - 3/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 4.66E+00 9.06E-01 1.22E+00 Mn-54 <2.85E+00 0.00E+00 2.85E+00 Co-58 <3.05E+00 0.00E+00 3.05E+00 Fe-59 <6.00E+00 0.00E+00 6.00E+00 Co-60 <2.42E+00 0.00E+00 2.42E+00 Zn-65 <5.59E+00 0.00E+00 5.59E+00 Zr-95 <5.82E+00 0.00E+00 5.82E+00 Nb-95 <3.81E+00 0.00E+00 3.81E+00 I-131 <1.14E+01 0.00E+00 1.14E+01 Cs-134 <3.38E+00 0.00E+00 3.38E+00 Cs-137 <2.95E+00 0.00E+00 2.95E+00 BaLa-140 <8.90E+00 0.00E+00 8.90E+00 Be-7 <3.17E+01 0.00E+00 3.17E+01 K-40 1.08E+02 3.64E+01 3.81E+01 H3DW <-1.3E+02 0.00E+00 1.91E+02 Sample ID: 473628 Sample Dates: 3/19/2018 - 4/16/2018 Nuclide Activity 2 Sigma Error MDA Beta 3.87E+00 9.64E-01 1.37E+00 Mn-54 <3.40E+00 0.00E+00 3.40E+00 Co-58 <3.23E+00 0.00E+00 3.23E+00 Fe-59 <6.02E+00 0.00E+00 6.02E+00 Co-60 <3.49E+00 0.00E+00 3.49E+00 Zn-65 <7.77E+00 0.00E+00 7.77E+00 Zr-95 <6.23E+00 0.00E+00 6.23E+00 Nb-95 <4.38E+00 0.00E+00 4.38E+00 I-131 <1.15E+01 0.00E+00 1.15E+01 Cs-134 <3.07E+00 0.00E+00 3.07E+00 Cs-137 <3.18E+00 0.00E+00 3.18E+00 BaLa-140 <7.71E+00 0.00E+00 7.71E+00 Be-7 <2.74E+01 0.00E+00 2.74E+01 K-40 2.14E+01 2.48E+01 3.98E+01 H3DW <3.07E+01 0.00E+00 1.74E+02 Sample ID: 475209 Sample Dates: 4/16/2018 - 5/14/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.93E+00 1.01E+00 1.54E+00 Mn-54 <2.52E+00 0.00E+00 2.52E+00 Co-58 <3.06E+00 0.00E+00 3.06E+00 Fe-59 <6.15E+00 0.00E+00 6.15E+00 Co-60 <2.45E+00 0.00E+00 2.45E+00 Zn-65 <4.77E+00 0.00E+00 4.77E+00 Zr-95 <5.15E+00 0.00E+00 5.15E+00 Nb-95 <2.56E+00 0.00E+00 2.56E+00 I-131 <1.09E+01 0.00E+00 1.09E+01 Cs-134 <2.35E+00 0.00E+00 2.35E+00 Cs-137 <2.58E+00 0.00E+00 2.58E+00 BaLa-140 <7.17E+00 0.00E+00 7.17E+00 Be-7 <2.83E+01 0.00E+00 2.83E+01 K-40 4.52E+01 2.53E+01 3.44E+01 H3DW <-3.8E+01 0.00E+00 1.93E+02 Sample ID: 478101 Sample Dates: 5/14/2018 - 6/11/2018 Nuclide Activity 2 Sigma Error MDA Beta 3.23E+00 8.90E-01 1.31E+00 Mn-54 <2.67E+00 0.00E+00 2.67E+00 Co-58 <4.14E+00 0.00E+00 4.14E+00 Fe-59 <8.61E+00 0.00E+00 8.61E+00 Co-60 <4.98E+00 0.00E+00 4.98E+00 Zn-65 <9.18E+00 0.00E+00 9.18E+00 Zr-95 <8.87E+00 0.00E+00 8.87E+00 Nb-95 <4.92E+00 0.00E+00 4.92E+00 I-131 <1.12E+01 0.00E+00 1.12E+01 Cs-134 <3.30E+00 0.00E+00 3.30E+00 Cs-137 <3.60E+00 0.00E+00 3.60E+00 BaLa-140 <2.50E+00 0.00E+00 2.50E+00 Be-7 <3.77E+01 0.00E+00 3.77E+01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 83 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: DRINKING WATER Concentration (Activity): pCi/l 58 Sample Point 58 [ CONTROL - SW @ 8.47 miles ]

Sample ID: 478101 Sample Dates: 5/14/2018 - 6/11/2018 Nuclide Activity 2 Sigma Error MDA K-40 <7.00E+01 0.00E+00 7.00E+01 H3DW <1.67E+01 0.00E+00 1.91E+02 Sample ID: 479875 Sample Dates: 6/11/2018 - 7/9/2018 Nuclide Activity 2 Sigma Error MDA Beta 3.35E+00 1.10E+00 1.68E+00 Mn-54 <3.18E+00 0.00E+00 3.18E+00 Co-58 <3.54E+00 0.00E+00 3.54E+00 Fe-59 <6.55E+00 0.00E+00 6.55E+00 Co-60 <4.24E+00 0.00E+00 4.24E+00 Zn-65 <5.18E+00 0.00E+00 5.18E+00 Zr-95 <4.17E+00 0.00E+00 4.17E+00 Nb-95 <3.49E+00 0.00E+00 3.49E+00 I-131 <1.19E+01 0.00E+00 1.19E+01 Cs-134 <3.79E+00 0.00E+00 3.79E+00 Cs-137 <3.09E+00 0.00E+00 3.09E+00 BaLa-140 <7.88E+00 0.00E+00 7.88E+00 Be-7 <2.85E+01 0.00E+00 2.85E+01 K-40 <4.51E+01 0.00E+00 4.51E+01 H3DW <1.57E+01 0.00E+00 1.82E+02 Sample ID: 481954 Sample Dates: 7/9/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.68E+00 1.15E+00 1.81E+00 Mn-54 <1.46E+00 0.00E+00 1.46E+00 Co-58 <1.74E+00 0.00E+00 1.74E+00 Fe-59 <3.52E+00 0.00E+00 3.52E+00 Co-60 <1.52E+00 0.00E+00 1.52E+00 Zn-65 <3.14E+00 0.00E+00 3.14E+00 Zr-95 <3.25E+00 0.00E+00 3.25E+00 Nb-95 <2.52E+00 0.00E+00 2.52E+00 I-131 <9.26E+00 0.00E+00 9.26E+00 Cs-134 <1.95E+00 0.00E+00 1.95E+00 Cs-137 <1.49E+00 0.00E+00 1.49E+00 BaLa-140 <5.73E+00 0.00E+00 5.73E+00 Be-7 <1.38E+01 0.00E+00 1.38E+01 K-40 2.55E+01 1.65E+01 2.50E+01 H3DW <2.40E+00 0.00E+00 1.89E+02 Sample ID: 484011 Sample Dates: 8/6/2018 - 9/4/2018 Nuclide Activity 2 Sigma Error MDA Beta 4.63E+00 8.94E-01 1.21E+00 Mn-54 <3.15E+00 0.00E+00 3.15E+00 Co-58 <3.51E+00 0.00E+00 3.51E+00 Fe-59 <9.62E+00 0.00E+00 9.62E+00 Co-60 <2.37E+00 0.00E+00 2.37E+00 Zn-65 <5.51E+00 0.00E+00 5.51E+00 Zr-95 <8.61E+00 0.00E+00 8.61E+00 Nb-95 <5.27E+00 0.00E+00 5.27E+00 I-131 <1.18E+01 0.00E+00 1.18E+01 Cs-134 <4.22E+00 0.00E+00 4.22E+00 Cs-137 <3.71E+00 0.00E+00 3.71E+00 BaLa-140 <1.11E+01 0.00E+00 1.11E+01 Be-7 <3.55E+01 0.00E+00 3.55E+01 K-40 <6.80E+01 0.00E+00 6.80E+01 H3DW <-2.2E+01 0.00E+00 1.93E+02 Sample ID: 485256 Sample Dates: 9/4/2018 - 10/1/2018 Nuclide Activity 2 Sigma Error MDA Beta 2.62E+00 1.02E+00 1.58E+00 Mn-54 <3.70E+00 0.00E+00 3.70E+00 Co-58 <3.47E+00 0.00E+00 3.47E+00 Fe-59 <7.07E+00 0.00E+00 7.07E+00 Co-60 <2.84E+00 0.00E+00 2.84E+00 Zn-65 <5.97E+00 0.00E+00 5.97E+00 Zr-95 <6.15E+00 0.00E+00 6.15E+00 Nb-95 <4.47E+00 0.00E+00 4.47E+00 I-131 <1.12E+01 0.00E+00 1.12E+01 Cs-134 <1.92E+00 0.00E+00 1.92E+00 Cs-137 <3.82E+00 0.00E+00 3.82E+00 BaLa-140 <7.07E+00 0.00E+00 7.07E+00 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 84 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: DRINKING WATER Concentration (Activity): pCi/l 58 Sample Point 58 [ CONTROL - SW @ 8.47 miles ]

Sample ID: 485256 Sample Dates: 9/4/2018 - 10/1/2018 Nuclide Activity 2 Sigma Error MDA Be-7 <2.87E+01 0.00E+00 2.87E+01 K-40 5.49E+01 3.47E+01 4.97E+01 H3DW <-1.4E+02 0.00E+00 1.98E+02 Sample ID: 488467 Sample Dates: 10/1/2018 - 10/29/2018 Nuclide Activity 2 Sigma Error MDA Beta 3.19E+00 9.58E-01 1.42E+00 Mn-54 <3.76E+00 0.00E+00 3.76E+00 Co-58 <3.35E+00 0.00E+00 3.35E+00 Fe-59 <9.93E+00 0.00E+00 9.93E+00 Co-60 <3.59E+00 0.00E+00 3.59E+00 Zn-65 <9.25E+00 0.00E+00 9.25E+00 Zr-95 <6.97E+00 0.00E+00 6.97E+00 Nb-95 <4.70E+00 0.00E+00 4.70E+00 I-131 <1.18E+01 0.00E+00 1.18E+01 Cs-134 <3.92E+00 0.00E+00 3.92E+00 Cs-137 <3.19E+00 0.00E+00 3.19E+00 BaLa-140 <1.11E+01 0.00E+00 1.11E+01 Be-7 <3.56E+01 0.00E+00 3.56E+01 K-40 <7.23E+01 0.00E+00 7.23E+01 H3DW <-8.4E+01 0.00E+00 1.91E+02 Sample ID: 490148 Sample Dates: 10/29/2018 - 11/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 3.58E+00 9.45E-01 1.37E+00 Mn-54 <2.61E+00 0.00E+00 2.61E+00 Co-58 <2.54E+00 0.00E+00 2.54E+00 Fe-59 <7.18E+00 0.00E+00 7.18E+00 Co-60 <2.08E+00 0.00E+00 2.08E+00 Zn-65 <5.92E+00 0.00E+00 5.92E+00 Zr-95 <5.70E+00 0.00E+00 5.70E+00 Nb-95 <4.31E+00 0.00E+00 4.31E+00 I-131 <1.17E+01 0.00E+00 1.17E+01 Cs-134 <3.40E+00 0.00E+00 3.40E+00 Cs-137 <2.80E+00 0.00E+00 2.80E+00 BaLa-140 <5.77E+00 0.00E+00 5.77E+00 Be-7 <2.97E+01 0.00E+00 2.97E+01 K-40 <4.80E+01 0.00E+00 4.80E+01 H3DW <-3.6E+01 0.00E+00 1.89E+02 Sample ID: 491743 Sample Dates: 11/26/2018 - 12/26/2018 Nuclide Activity 2 Sigma Error MDA Beta 1.65E+00 8.03E-01 1.28E+00 Mn-54 <1.74E+00 0.00E+00 1.74E+00 Co-58 <2.18E+00 0.00E+00 2.18E+00 Fe-59 <3.80E+00 0.00E+00 3.80E+00 Co-60 <1.49E+00 0.00E+00 1.49E+00 Zn-65 <5.03E+00 0.00E+00 5.03E+00 Zr-95 <3.47E+00 0.00E+00 3.47E+00 Nb-95 <2.71E+00 0.00E+00 2.71E+00 I-131 <1.18E+01 0.00E+00 1.18E+01 Cs-134 <1.98E+00 0.00E+00 1.98E+00 Cs-137 <1.98E+00 0.00E+00 1.98E+00 BaLa-140 <5.58E+00 0.00E+00 5.58E+00 Be-7 <1.79E+01 0.00E+00 1.79E+01 K-40 3.46E+01 2.00E+01 2.96E+01 H3DW <-2.6E+01 0.00E+00 1.96E+02 Media Type: FISH Concentration (Activity): pCi/kg wet 44 Sample Point 44 [ INDICATOR - -- @ 0 miles ]

Sample ID: 472415 Sample Dates: 4/19/2018 - 4/19/2018 BOTMFEEDER Nuclide Activity 2 Sigma Error MDA Mn-54 <3.74E+01 0.00E+00 3.74E+01 Co-58 <2.98E+01 0.00E+00 2.98E+01 Fe-59 <9.73E+01 0.00E+00 9.73E+01 Co-60 <4.38E+01 0.00E+00 4.38E+01 Zn-65 <7.92E+01 0.00E+00 7.92E+01 Nb-95 <5.15E+01 0.00E+00 5.15E+01 I-131 <1.27E+02 0.00E+00 1.27E+02 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 85 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: FISH Concentration (Activity): pCi/kg wet 44 Sample Point 44 [ INDICATOR - -- @ 0 miles ]

Sample ID: 472415 Sample Dates: 4/19/2018 - 4/19/2018 BOTMFEEDER Nuclide Activity 2 Sigma Error MDA Cs-134 <4.42E+01 0.00E+00 4.42E+01 Cs-137 <4.22E+01 0.00E+00 4.22E+01 Be-7 <3.55E+02 0.00E+00 3.55E+02 K-40 2.78E+03 7.79E+02 6.33E+02 Ag-110M <3.25E+01 0.00E+00 3.25E+01 Sb-122 <4.20E+03 0.00E+00 4.20E+03 Sb-125 <5.16E+01 0.00E+00 5.16E+01 Sample ID: 472416 Sample Dates: 4/19/2018 - 4/19/2018 FREESWIM Nuclide Activity 2 Sigma Error MDA Mn-54 <3.61E+01 0.00E+00 3.61E+01 Co-58 <4.40E+01 0.00E+00 4.40E+01 Fe-59 <9.45E+01 0.00E+00 9.45E+01 Co-60 <4.68E+01 0.00E+00 4.68E+01 Zn-65 <8.50E+01 0.00E+00 8.50E+01 Nb-95 <5.69E+01 0.00E+00 5.69E+01 I-131 <1.45E+02 0.00E+00 1.45E+02 Cs-134 <4.80E+01 0.00E+00 4.80E+01 Cs-137 <3.63E+01 0.00E+00 3.63E+01 Be-7 <2.93E+02 0.00E+00 2.93E+02 K-40 3.42E+03 8.31E+02 5.64E+02 Ag-110M <2.88E+01 0.00E+00 2.88E+01 Sb-122 <5.48E+03 0.00E+00 5.48E+03 Sb-125 <8.05E+01 0.00E+00 8.05E+01 Sample ID: 472417 Sample Dates: 4/19/2018 - 4/20/2018 FREESWIM Nuclide Activity 2 Sigma Error MDA Mn-54 <2.67E+01 0.00E+00 2.67E+01 Co-58 <3.49E+01 0.00E+00 3.49E+01 Fe-59 <6.05E+01 0.00E+00 6.05E+01 Co-60 <3.81E+01 0.00E+00 3.81E+01 Zn-65 <1.05E+02 0.00E+00 1.05E+02 Nb-95 <5.88E+01 0.00E+00 5.88E+01 I-131 <1.24E+02 0.00E+00 1.24E+02 Cs-134 <3.40E+01 0.00E+00 3.40E+01 Cs-137 <1.98E+01 0.00E+00 1.98E+01 Be-7 <3.05E+02 0.00E+00 3.05E+02 K-40 2.98E+03 8.02E+02 6.14E+02 Ag-110M <2.69E+01 0.00E+00 2.69E+01 Sb-122 <4.61E+03 0.00E+00 4.61E+03 Sb-125 <7.91E+01 0.00E+00 7.91E+01 Sample ID: 485466 Sample Dates: 10/1/2018 - 10/1/2018 BOTMFEEDER Nuclide Activity 2 Sigma Error MDA Mn-54 <5.76E+01 0.00E+00 5.76E+01 Co-58 <7.08E+01 0.00E+00 7.08E+01 Fe-59 <1.52E+02 0.00E+00 1.52E+02 Co-60 <7.05E+01 0.00E+00 7.05E+01 Zn-65 <1.61E+02 0.00E+00 1.61E+02 Nb-95 <3.98E+01 0.00E+00 3.98E+01 I-131 <9.98E+01 0.00E+00 9.98E+01 Cs-134 <6.42E+01 0.00E+00 6.42E+01 Cs-137 <6.97E+01 0.00E+00 6.97E+01 Be-7 <4.31E+02 0.00E+00 4.31E+02 K-40 3.61E+03 1.08E+03 1.07E+03 Ag-110M <6.99E+01 0.00E+00 6.99E+01 Sb-122 <9.70E+02 0.00E+00 9.70E+02 Sb-125 <1.63E+02 0.00E+00 1.63E+02 Sample ID: 485467 Sample Dates: 10/1/2018 - 10/1/2018 FREESWIM Nuclide Activity 2 Sigma Error MDA Mn-54 <4.72E+01 0.00E+00 4.72E+01 Co-58 <6.47E+01 0.00E+00 6.47E+01 Fe-59 <8.86E+01 0.00E+00 8.86E+01 Co-60 <7.01E+01 0.00E+00 7.01E+01 Zn-65 <1.44E+02 0.00E+00 1.44E+02 Nb-95 <6.46E+01 0.00E+00 6.46E+01 I-131 <1.33E+02 0.00E+00 1.33E+02 Cs-134 <6.81E+01 0.00E+00 6.81E+01 Cs-137 <5.60E+01 0.00E+00 5.60E+01 Be-7 <4.32E+02 0.00E+00 4.32E+02 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 86 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: FISH Concentration (Activity): pCi/kg wet 44 Sample Point 44 [ INDICATOR - -- @ 0 miles ]

Sample ID: 485467 Sample Dates: 10/1/2018 - 10/1/2018 FREESWIM Nuclide Activity 2 Sigma Error MDA K-40 4.34E+03 1.07E+03 6.42E+02 Ag-110M <6.15E+01 0.00E+00 6.15E+01 Sb-122 <8.50E+02 0.00E+00 8.50E+02 Sb-125 <1.77E+02 0.00E+00 1.77E+02 Sample ID: 485468 Sample Dates: 10/1/2018 - 10/1/2018 FREESWIM Nuclide Activity 2 Sigma Error MDA Mn-54 <5.73E+01 0.00E+00 5.73E+01 Co-58 <3.11E+01 0.00E+00 3.11E+01 Fe-59 <1.11E+02 0.00E+00 1.11E+02 Co-60 <6.24E+01 0.00E+00 6.24E+01 Zn-65 <1.04E+02 0.00E+00 1.04E+02 Nb-95 <4.97E+01 0.00E+00 4.97E+01 I-131 <9.20E+01 0.00E+00 9.20E+01 Cs-134 <5.87E+01 0.00E+00 5.87E+01 Cs-137 <5.32E+01 0.00E+00 5.32E+01 Be-7 <4.35E+02 0.00E+00 4.35E+02 K-40 3.59E+03 9.41E+02 7.87E+02 Ag-110M <4.84E+01 0.00E+00 4.84E+01 Sb-122 <4.80E+02 0.00E+00 4.80E+02 Sb-125 <1.17E+02 0.00E+00 1.17E+02 Sample Point 45 [ CONTROL - -- @ 0 miles ]

Sample ID: 472418 Sample Dates: 4/20/2018 - 4/20/2018 FREESWIM Nuclide Activity 2 Sigma Error MDA Mn-54 <9.29E+00 0.00E+00 9.29E+00 Co-58 <1.04E+01 0.00E+00 1.04E+01 Fe-59 <9.02E+01 0.00E+00 9.02E+01 Co-60 <3.61E+01 0.00E+00 3.61E+01 Zn-65 <8.22E+01 0.00E+00 8.22E+01 Nb-95 <6.17E+01 0.00E+00 6.17E+01 I-131 <1.63E+02 0.00E+00 1.63E+02 Cs-134 <2.77E+01 0.00E+00 2.77E+01 Cs-137 <3.45E+01 0.00E+00 3.45E+01 Be-7 <4.46E+02 0.00E+00 4.46E+02 K-40 4.20E+03 1.03E+03 7.19E+02 Ag-110M <3.58E+01 0.00E+00 3.58E+01 Sb-122 <3.81E+03 0.00E+00 3.81E+03 Sb-125 <4.92E+01 0.00E+00 4.92E+01 Sample ID: 472419 Sample Dates: 4/20/2018 - 4/20/2018 FREESWIM Nuclide Activity 2 Sigma Error MDA Mn-54 <3.29E+01 0.00E+00 3.29E+01 Co-58 <3.38E+01 0.00E+00 3.38E+01 Fe-59 <5.23E+01 0.00E+00 5.23E+01 Co-60 <3.86E+01 0.00E+00 3.86E+01 Zn-65 <6.01E+01 0.00E+00 6.01E+01 Nb-95 <2.97E+01 0.00E+00 2.97E+01 I-131 <1.22E+02 0.00E+00 1.22E+02 Cs-134 <2.96E+01 0.00E+00 2.96E+01 Cs-137 <2.17E+01 0.00E+00 2.17E+01 Be-7 <3.26E+02 0.00E+00 3.26E+02 K-40 2.68E+03 6.82E+02 3.86E+02 Ag-110M <2.85E+01 0.00E+00 2.85E+01 Sb-122 <3.27E+03 0.00E+00 3.27E+03 Sb-125 <5.26E+01 0.00E+00 5.26E+01 Sample ID: 472420 Sample Dates: 4/20/2018 - 4/20/2018 BOTMFEEDER Nuclide Activity 2 Sigma Error MDA Mn-54 <3.63E+01 0.00E+00 3.63E+01 Co-58 <2.28E+01 0.00E+00 2.28E+01 Fe-59 <1.02E+02 0.00E+00 1.02E+02 Co-60 <3.68E+01 0.00E+00 3.68E+01 Zn-65 <6.63E+01 0.00E+00 6.63E+01 Nb-95 <3.75E+01 0.00E+00 3.75E+01 I-131 <1.13E+02 0.00E+00 1.13E+02 Cs-134 <4.30E+01 0.00E+00 4.30E+01 Cs-137 <3.11E+01 0.00E+00 3.11E+01 Be-7 <2.20E+02 0.00E+00 2.20E+02 K-40 3.41E+03 8.53E+02 6.52E+02 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 87 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: FISH Concentration (Activity): pCi/kg wet 45 Sample Point 45 [ CONTROL - -- @ 0 miles ]

Sample ID: 472420 Sample Dates: 4/20/2018 - 4/20/2018 BOTMFEEDER Nuclide Activity 2 Sigma Error MDA Ag-110M <3.39E+01 0.00E+00 3.39E+01 Sb-122 <3.17E+03 0.00E+00 3.17E+03 Sb-125 <8.11E+01 0.00E+00 8.11E+01 Sample ID: 485469 Sample Dates: 10/1/2018 - 10/1/2018 FREESWIM Nuclide Activity 2 Sigma Error MDA Mn-54 <4.98E+01 0.00E+00 4.98E+01 Co-58 <5.13E+01 0.00E+00 5.13E+01 Fe-59 <9.88E+01 0.00E+00 9.88E+01 Co-60 <4.75E+01 0.00E+00 4.75E+01 Zn-65 <1.46E+02 0.00E+00 1.46E+02 Nb-95 <6.57E+01 0.00E+00 6.57E+01 I-131 <1.21E+02 0.00E+00 1.21E+02 Cs-134 <6.84E+01 0.00E+00 6.84E+01 Cs-137 <6.21E+01 0.00E+00 6.21E+01 Be-7 <5.58E+02 0.00E+00 5.58E+02 K-40 4.78E+03 1.17E+03 9.60E+02 Ag-110M <5.66E+01 0.00E+00 5.66E+01 Sb-122 <7.63E+02 0.00E+00 7.63E+02 Sb-125 <1.77E+02 0.00E+00 1.77E+02 Sample ID: 485470 Sample Dates: 10/1/2018 - 10/1/2018 FREESWIM Nuclide Activity 2 Sigma Error MDA Mn-54 <5.61E+01 0.00E+00 5.61E+01 Co-58 <6.54E+01 0.00E+00 6.54E+01 Fe-59 <8.21E+01 0.00E+00 8.21E+01 Co-60 <5.95E+01 0.00E+00 5.95E+01 Zn-65 <1.16E+02 0.00E+00 1.16E+02 Nb-95 <6.90E+01 0.00E+00 6.90E+01 I-131 <1.01E+02 0.00E+00 1.01E+02 Cs-134 <7.42E+01 0.00E+00 7.42E+01 Cs-137 <5.95E+01 0.00E+00 5.95E+01 Be-7 <5.05E+02 0.00E+00 5.05E+02 K-40 4.67E+03 1.07E+03 5.86E+02 Ag-110M <5.18E+01 0.00E+00 5.18E+01 Sb-122 <7.52E+02 0.00E+00 7.52E+02 Sb-125 <1.26E+02 0.00E+00 1.26E+02 Sample ID: 485471 Sample Dates: 10/1/2018 - 10/1/2018 BOTMFEEDER Nuclide Activity 2 Sigma Error MDA Mn-54 <4.75E+01 0.00E+00 4.75E+01 Co-58 <3.25E+01 0.00E+00 3.25E+01 Fe-59 <9.99E+01 0.00E+00 9.99E+01 Co-60 <4.76E+01 0.00E+00 4.76E+01 Zn-65 <9.34E+01 0.00E+00 9.34E+01 Nb-95 <4.79E+01 0.00E+00 4.79E+01 I-131 <9.57E+01 0.00E+00 9.57E+01 Cs-134 <5.97E+01 0.00E+00 5.97E+01 Cs-137 <4.14E+01 0.00E+00 4.14E+01 Be-7 <4.55E+02 0.00E+00 4.55E+02 K-40 3.68E+03 9.22E+02 8.07E+02 Ag-110M <3.54E+01 0.00E+00 3.54E+01 Sb-122 <7.31E+02 0.00E+00 7.31E+02 Sb-125 <1.18E+02 0.00E+00 1.18E+02 Media Type: GROUND WATER Concentration (Activity): pCi/l 57 Sample Point 57 [ INDICATOR - SSW @ 0.4 miles ]

Sample ID: 467117 Sample Dates: 2/20/2018 - 2/20/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.99E+00 0.00E+00 5.99E+00 Co-58 <6.03E+00 0.00E+00 6.03E+00 Fe-59 <1.05E+01 0.00E+00 1.05E+01 Co-60 <6.81E+00 0.00E+00 6.81E+00 Zn-65 <1.09E+01 0.00E+00 1.09E+01 Zr-95 <1.12E+01 0.00E+00 1.12E+01 Nb-95 <7.37E+00 0.00E+00 7.37E+00 I-131 <9.72E+00 0.00E+00 9.72E+00 Cs-134 <5.12E+00 0.00E+00 5.12E+00 Cs-137 <6.99E+00 0.00E+00 6.99E+00 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 88 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: GROUND WATER Concentration (Activity): pCi/l 57 Sample Point 57 [ INDICATOR - SSW @ 0.4 miles ]

Sample ID: 467117 Sample Dates: 2/20/2018 - 2/20/2018 Nuclide Activity 2 Sigma Error MDA BaLa-140 <1.19E+01 0.00E+00 1.19E+01 Be-7 <4.81E+01 0.00E+00 4.81E+01 K-40 <1.04E+02 0.00E+00 1.04E+02 H3GW <4.48E+01 0.00E+00 1.86E+02 Sample ID: 474243 Sample Dates: 5/8/2018 - 5/8/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.42E+00 0.00E+00 5.42E+00 Co-58 <5.70E+00 0.00E+00 5.70E+00 Fe-59 <1.23E+01 0.00E+00 1.23E+01 Co-60 <5.53E+00 0.00E+00 5.53E+00 Zn-65 <1.06E+01 0.00E+00 1.06E+01 Zr-95 <1.17E+01 0.00E+00 1.17E+01 Nb-95 <7.16E+00 0.00E+00 7.16E+00 I-131 <1.03E+01 0.00E+00 1.03E+01 Cs-134 <6.04E+00 0.00E+00 6.04E+00 Cs-137 <6.92E+00 0.00E+00 6.92E+00 BaLa-140 <1.07E+01 0.00E+00 1.07E+01 Be-7 <4.15E+01 0.00E+00 4.15E+01 K-40 <1.24E+02 0.00E+00 1.24E+02 H3GW <-4.2E+01 0.00E+00 1.83E+02 Sample ID: 481128 Sample Dates: 8/7/2018 - 8/7/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <6.20E+00 0.00E+00 6.20E+00 Co-58 <6.98E+00 0.00E+00 6.98E+00 Fe-59 <1.36E+01 0.00E+00 1.36E+01 Co-60 <4.44E+00 0.00E+00 4.44E+00 Zn-65 <9.52E+00 0.00E+00 9.52E+00 Zr-95 <8.81E+00 0.00E+00 8.81E+00 Nb-95 <6.82E+00 0.00E+00 6.82E+00 I-131 <7.07E+00 0.00E+00 7.07E+00 Cs-134 <6.97E+00 0.00E+00 6.97E+00 Cs-137 <4.96E+00 0.00E+00 4.96E+00 BaLa-140 <7.86E+00 0.00E+00 7.86E+00 Be-7 <4.60E+01 0.00E+00 4.60E+01 K-40 <1.07E+02 0.00E+00 1.07E+02 H3GW <-3.8E+01 0.00E+00 1.80E+02 Sample ID: 481198 Sample Dates: 11/14/2018 - 11/14/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.68E+00 0.00E+00 5.68E+00 Co-58 <5.62E+00 0.00E+00 5.62E+00 Fe-59 <1.13E+01 0.00E+00 1.13E+01 Co-60 <5.59E+00 0.00E+00 5.59E+00 Zn-65 <9.90E+00 0.00E+00 9.90E+00 Zr-95 <1.02E+01 0.00E+00 1.02E+01 Nb-95 <5.90E+00 0.00E+00 5.90E+00 I-131 <9.40E+00 0.00E+00 9.40E+00 Cs-134 <6.35E+00 0.00E+00 6.35E+00 Cs-137 <5.33E+00 0.00E+00 5.33E+00 BaLa-140 <9.82E+00 0.00E+00 9.82E+00 Be-7 <4.23E+01 0.00E+00 4.23E+01 K-40 <1.13E+02 0.00E+00 1.13E+02 H3GW <9.47E+00 0.00E+00 1.85E+02 Sample Point 59 [ INDICATOR - NNE @ 0.5 miles ]

Sample ID: 467118 Sample Dates: 2/21/2018 - 2/21/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.76E+00 0.00E+00 5.76E+00 Co-58 <4.29E+00 0.00E+00 4.29E+00 Fe-59 <9.86E+00 0.00E+00 9.86E+00 Co-60 <7.78E+00 0.00E+00 7.78E+00 Zn-65 <1.26E+01 0.00E+00 1.26E+01 Zr-95 <1.15E+01 0.00E+00 1.15E+01 Nb-95 <7.08E+00 0.00E+00 7.08E+00 I-131 <7.57E+00 0.00E+00 7.57E+00 Cs-134 <6.45E+00 0.00E+00 6.45E+00 Cs-137 <6.40E+00 0.00E+00 6.40E+00 BaLa-140 <9.73E+00 0.00E+00 9.73E+00 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 89 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: GROUND WATER Concentration (Activity): pCi/l 59 Sample Point 59 [ INDICATOR - NNE @ 0.5 miles ]

Sample ID: 467118 Sample Dates: 2/21/2018 - 2/21/2018 Nuclide Activity 2 Sigma Error MDA Be-7 <4.17E+01 0.00E+00 4.17E+01 K-40 <9.26E+01 0.00E+00 9.26E+01 H3GW <-4.7E+00 0.00E+00 1.86E+02 Sample ID: 474244 Sample Dates: 5/8/2018 - 5/8/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <2.56E+00 0.00E+00 2.56E+00 Co-58 <4.54E+00 0.00E+00 4.54E+00 Fe-59 <7.76E+00 0.00E+00 7.76E+00 Co-60 <3.79E+00 0.00E+00 3.79E+00 Zn-65 <7.51E+00 0.00E+00 7.51E+00 Zr-95 <7.98E+00 0.00E+00 7.98E+00 Nb-95 <4.51E+00 0.00E+00 4.51E+00 I-131 <1.10E+01 0.00E+00 1.10E+01 Cs-134 <4.25E+00 0.00E+00 4.25E+00 Cs-137 <3.66E+00 0.00E+00 3.66E+00 BaLa-140 <9.57E+00 0.00E+00 9.57E+00 Be-7 <3.15E+01 0.00E+00 3.15E+01 K-40 <7.75E+01 0.00E+00 7.75E+01 H3GW <-8.0E+01 0.00E+00 1.89E+02 Sample ID: 481129 Sample Dates: 8/6/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <4.97E+00 0.00E+00 4.97E+00 Co-58 <3.35E+00 0.00E+00 3.35E+00 Fe-59 <1.15E+01 0.00E+00 1.15E+01 Co-60 <5.53E+00 0.00E+00 5.53E+00 Zn-65 <1.19E+01 0.00E+00 1.19E+01 Zr-95 <9.05E+00 0.00E+00 9.05E+00 Nb-95 <7.19E+00 0.00E+00 7.19E+00 I-131 <8.58E+00 0.00E+00 8.58E+00 Cs-134 <6.69E+00 0.00E+00 6.69E+00 Cs-137 <6.14E+00 0.00E+00 6.14E+00 BaLa-140 <1.08E+01 0.00E+00 1.08E+01 Be-7 <4.10E+01 0.00E+00 4.10E+01 K-40 1.40E+02 5.38E+01 4.45E+01 H3GW <-4.3E+01 0.00E+00 1.80E+02 Sample ID: 481199 Sample Dates: 11/12/2018 - 11/12/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.33E+00 0.00E+00 5.33E+00 Co-58 <5.11E+00 0.00E+00 5.11E+00 Fe-59 <1.08E+01 0.00E+00 1.08E+01 Co-60 <5.43E+00 0.00E+00 5.43E+00 Zn-65 <9.68E+00 0.00E+00 9.68E+00 Zr-95 <9.73E+00 0.00E+00 9.73E+00 Nb-95 <5.28E+00 0.00E+00 5.28E+00 I-131 <1.02E+01 0.00E+00 1.02E+01 Cs-134 <6.59E+00 0.00E+00 6.59E+00 Cs-137 <5.87E+00 0.00E+00 5.87E+00 BaLa-140 <2.06E+00 0.00E+00 2.06E+00 Be-7 <4.17E+01 0.00E+00 4.17E+01 K-40 <9.74E+01 0.00E+00 9.74E+01 H3GW <-2.1E+01 0.00E+00 1.84E+02 Sample Point 60 [ INDICATOR - ESE @ 0.5 miles ]

Sample ID: 467119 Sample Dates: 2/21/2018 - 2/21/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <6.35E+00 0.00E+00 6.35E+00 Co-58 <4.62E+00 0.00E+00 4.62E+00 Fe-59 <8.10E+00 0.00E+00 8.10E+00 Co-60 <4.83E+00 0.00E+00 4.83E+00 Zn-65 <1.13E+01 0.00E+00 1.13E+01 Zr-95 <8.86E+00 0.00E+00 8.86E+00 Nb-95 <6.79E+00 0.00E+00 6.79E+00 I-131 <6.78E+00 0.00E+00 6.78E+00 Cs-134 <5.51E+00 0.00E+00 5.51E+00 Cs-137 <5.17E+00 0.00E+00 5.17E+00 BaLa-140 <7.19E+00 0.00E+00 7.19E+00 Be-7 <4.06E+01 0.00E+00 4.06E+01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 90 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: GROUND WATER Concentration (Activity): pCi/l 60 Sample Point 60 [ INDICATOR - ESE @ 0.5 miles ]

Sample ID: 467119 Sample Dates: 2/21/2018 - 2/21/2018 Nuclide Activity 2 Sigma Error MDA K-40 9.47E+01 5.08E+01 6.29E+01 H3GW <0.00E+00 0.00E+00 1.86E+02 Sample ID: 474245 Sample Dates: 5/8/2018 - 5/8/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <6.01E+00 0.00E+00 6.01E+00 Co-58 <7.90E+00 0.00E+00 7.90E+00 Fe-59 <1.31E+01 0.00E+00 1.31E+01 Co-60 <5.86E+00 0.00E+00 5.86E+00 Zn-65 <1.13E+01 0.00E+00 1.13E+01 Zr-95 <1.18E+01 0.00E+00 1.18E+01 Nb-95 <5.55E+00 0.00E+00 5.55E+00 I-131 <1.05E+01 0.00E+00 1.05E+01 Cs-134 <5.35E+00 0.00E+00 5.35E+00 Cs-137 <5.15E+00 0.00E+00 5.15E+00 BaLa-140 <7.97E+00 0.00E+00 7.97E+00 Be-7 <3.86E+01 0.00E+00 3.86E+01 K-40 9.75E+01 6.22E+01 8.71E+01 H3GW <-1.3E+02 0.00E+00 1.83E+02 Sample ID: 481130 Sample Dates: 8/6/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.91E+00 0.00E+00 5.91E+00 Co-58 <5.29E+00 0.00E+00 5.29E+00 Fe-59 <8.42E+00 0.00E+00 8.42E+00 Co-60 <3.84E+00 0.00E+00 3.84E+00 Zn-65 <8.83E+00 0.00E+00 8.83E+00 Zr-95 <8.84E+00 0.00E+00 8.84E+00 Nb-95 <4.91E+00 0.00E+00 4.91E+00 I-131 <8.90E+00 0.00E+00 8.90E+00 Cs-134 <5.95E+00 0.00E+00 5.95E+00 Cs-137 <4.75E+00 0.00E+00 4.75E+00 BaLa-140 <9.29E+00 0.00E+00 9.29E+00 Be-7 <3.99E+01 0.00E+00 3.99E+01 K-40 <9.51E+01 0.00E+00 9.51E+01 H3GW <-2.2E+01 0.00E+00 1.80E+02 Sample ID: 481200 Sample Dates: 11/12/2018 - 11/12/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <4.28E+00 0.00E+00 4.28E+00 Co-58 <5.19E+00 0.00E+00 5.19E+00 Fe-59 <9.82E+00 0.00E+00 9.82E+00 Co-60 <6.05E+00 0.00E+00 6.05E+00 Zn-65 <1.08E+01 0.00E+00 1.08E+01 Zr-95 <1.01E+01 0.00E+00 1.01E+01 Nb-95 <6.74E+00 0.00E+00 6.74E+00 I-131 <9.30E+00 0.00E+00 9.30E+00 Cs-134 <4.77E+00 0.00E+00 4.77E+00 Cs-137 <5.18E+00 0.00E+00 5.18E+00 BaLa-140 <9.79E+00 0.00E+00 9.79E+00 Be-7 <4.91E+01 0.00E+00 4.91E+01 K-40 <9.48E+01 0.00E+00 9.48E+01 H3GW <-1.0E+02 0.00E+00 1.84E+02 Sample Point 68 [ INDICATOR - W @ 0.2 miles ]

Sample ID: 467120 Sample Dates: 2/20/2018 - 2/20/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.53E+00 0.00E+00 5.53E+00 Co-58 <5.72E+00 0.00E+00 5.72E+00 Fe-59 <1.41E+01 0.00E+00 1.41E+01 Co-60 <3.84E+00 0.00E+00 3.84E+00 Zn-65 <1.17E+01 0.00E+00 1.17E+01 Zr-95 <8.84E+00 0.00E+00 8.84E+00 Nb-95 <5.16E+00 0.00E+00 5.16E+00 I-131 <8.77E+00 0.00E+00 8.77E+00 Cs-134 <4.63E+00 0.00E+00 4.63E+00 Cs-137 <4.75E+00 0.00E+00 4.75E+00 BaLa-140 <6.60E+00 0.00E+00 6.60E+00 Be-7 <4.35E+01 0.00E+00 4.35E+01 K-40 <8.82E+01 0.00E+00 8.82E+01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 91 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: GROUND WATER Concentration (Activity): pCi/l 68 Sample Point 68 [ INDICATOR - W @ 0.2 miles ]

Sample ID: 467120 Sample Dates: 2/20/2018 - 2/20/2018 Nuclide Activity 2 Sigma Error MDA H3GW <4.72E+00 0.00E+00 1.86E+02 Sample ID: 474246 Sample Dates: 5/9/2018 - 5/9/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.80E+00 0.00E+00 5.80E+00 Co-58 <4.36E+00 0.00E+00 4.36E+00 Fe-59 <1.20E+01 0.00E+00 1.20E+01 Co-60 <6.69E+00 0.00E+00 6.69E+00 Zn-65 <1.36E+01 0.00E+00 1.36E+01 Zr-95 <1.15E+01 0.00E+00 1.15E+01 Nb-95 <6.93E+00 0.00E+00 6.93E+00 I-131 <7.51E+00 0.00E+00 7.51E+00 Cs-134 <4.99E+00 0.00E+00 4.99E+00 Cs-137 <7.06E+00 0.00E+00 7.06E+00 BaLa-140 <8.00E+00 0.00E+00 8.00E+00 Be-7 <4.42E+01 0.00E+00 4.42E+01 K-40 9.92E+01 5.46E+01 6.95E+01 H3GW <-7.1E+00 0.00E+00 1.83E+02 Sample ID: 481131 Sample Dates: 8/7/2018 - 8/7/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.53E+00 0.00E+00 5.53E+00 Co-58 <5.10E+00 0.00E+00 5.10E+00 Fe-59 <9.37E+00 0.00E+00 9.37E+00 Co-60 <5.84E+00 0.00E+00 5.84E+00 Zn-65 <1.11E+01 0.00E+00 1.11E+01 Zr-95 <9.71E+00 0.00E+00 9.71E+00 Nb-95 <6.16E+00 0.00E+00 6.16E+00 I-131 <6.89E+00 0.00E+00 6.89E+00 Cs-134 <6.38E+00 0.00E+00 6.38E+00 Cs-137 <5.70E+00 0.00E+00 5.70E+00 BaLa-140 <8.15E+00 0.00E+00 8.15E+00 Be-7 <3.50E+01 0.00E+00 3.50E+01 K-40 7.52E+01 6.69E+01 1.04E+02 H3GW <9.61E+01 0.00E+00 1.80E+02 Sample ID: 481201 Sample Dates: 11/14/2018 - 11/14/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <6.04E+00 0.00E+00 6.04E+00 Co-58 <4.37E+00 0.00E+00 4.37E+00 Fe-59 <1.31E+01 0.00E+00 1.31E+01 Co-60 <7.01E+00 0.00E+00 7.01E+00 Zn-65 <9.34E+00 0.00E+00 9.34E+00 Zr-95 <9.90E+00 0.00E+00 9.90E+00 Nb-95 <6.61E+00 0.00E+00 6.61E+00 I-131 <8.26E+00 0.00E+00 8.26E+00 Cs-134 <4.76E+00 0.00E+00 4.76E+00 Cs-137 <5.70E+00 0.00E+00 5.70E+00 BaLa-140 <7.12E+00 0.00E+00 7.12E+00 Be-7 <3.83E+01 0.00E+00 3.83E+01 K-40 <8.11E+01 0.00E+00 8.11E+01 H3GW <7.78E+01 0.00E+00 1.84E+02 Sample Point 69 [ INDICATOR - NNE @ 0.2 miles ]

Sample ID: 467121 Sample Dates: 2/20/2018 - 2/20/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.51E+00 0.00E+00 5.51E+00 Co-58 <6.09E+00 0.00E+00 6.09E+00 Fe-59 <1.22E+01 0.00E+00 1.22E+01 Co-60 <5.43E+00 0.00E+00 5.43E+00 Zn-65 <1.52E+01 0.00E+00 1.52E+01 Zr-95 <6.92E+00 0.00E+00 6.92E+00 Nb-95 <6.39E+00 0.00E+00 6.39E+00 I-131 <8.84E+00 0.00E+00 8.84E+00 Cs-134 <6.98E+00 0.00E+00 6.98E+00 Cs-137 <4.26E+00 0.00E+00 4.26E+00 BaLa-140 <7.60E+00 0.00E+00 7.60E+00 Be-7 <3.72E+01 0.00E+00 3.72E+01 K-40 9.09E+01 5.53E+01 7.50E+01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 92 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: GROUND WATER Concentration (Activity): pCi/l 69 Sample Point 69 [ INDICATOR - NNE @ 0.2 miles ]

Sample ID: 467121 Sample Dates: 2/20/2018 - 2/20/2018 Nuclide Activity 2 Sigma Error MDA H3GW <-3.3E+01 0.00E+00 1.86E+02 Sample ID: 474247 Sample Dates: 5/8/2018 - 5/8/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <4.52E+00 0.00E+00 4.52E+00 Co-58 <4.95E+00 0.00E+00 4.95E+00 Fe-59 <8.33E+00 0.00E+00 8.33E+00 Co-60 <4.34E+00 0.00E+00 4.34E+00 Zn-65 <8.60E+00 0.00E+00 8.60E+00 Zr-95 <7.32E+00 0.00E+00 7.32E+00 Nb-95 <5.11E+00 0.00E+00 5.11E+00 I-131 <1.05E+01 0.00E+00 1.05E+01 Cs-134 <6.58E+00 0.00E+00 6.58E+00 Cs-137 <4.13E+00 0.00E+00 4.13E+00 BaLa-140 <8.85E+00 0.00E+00 8.85E+00 Be-7 <4.50E+01 0.00E+00 4.50E+01 K-40 <1.10E+02 0.00E+00 1.10E+02 H3GW <-4.0E+01 0.00E+00 1.83E+02 Sample ID: 481132 Sample Dates: 8/7/2018 - 8/7/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <4.51E+00 0.00E+00 4.51E+00 Co-58 <5.77E+00 0.00E+00 5.77E+00 Fe-59 <9.08E+00 0.00E+00 9.08E+00 Co-60 <5.28E+00 0.00E+00 5.28E+00 Zn-65 <1.14E+01 0.00E+00 1.14E+01 Zr-95 <8.22E+00 0.00E+00 8.22E+00 Nb-95 <6.33E+00 0.00E+00 6.33E+00 I-131 <8.27E+00 0.00E+00 8.27E+00 Cs-134 <5.52E+00 0.00E+00 5.52E+00 Cs-137 <5.85E+00 0.00E+00 5.85E+00 BaLa-140 <8.80E+00 0.00E+00 8.80E+00 Be-7 <4.37E+01 0.00E+00 4.37E+01 K-40 7.91E+01 6.03E+01 9.02E+01 H3GW <-1.8E+01 0.00E+00 1.80E+02 Sample ID: 481202 Sample Dates: 11/12/2018 - 11/12/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.28E+00 0.00E+00 5.28E+00 Co-58 <4.75E+00 0.00E+00 4.75E+00 Fe-59 <1.28E+01 0.00E+00 1.28E+01 Co-60 <6.77E+00 0.00E+00 6.77E+00 Zn-65 <9.96E+00 0.00E+00 9.96E+00 Zr-95 <8.32E+00 0.00E+00 8.32E+00 Nb-95 <5.93E+00 0.00E+00 5.93E+00 I-131 <8.32E+00 0.00E+00 8.32E+00 Cs-134 <6.13E+00 0.00E+00 6.13E+00 Cs-137 <5.53E+00 0.00E+00 5.53E+00 BaLa-140 <1.17E+01 0.00E+00 1.17E+01 Be-7 <3.95E+01 0.00E+00 3.95E+01 K-40 <7.43E+01 0.00E+00 7.43E+01 H3GW <6.63E+01 0.00E+00 1.85E+02 Sample Point 70 [ INDICATOR - E @ 0.4 miles ]

Sample ID: 467122 Sample Dates: 2/20/2018 - 2/20/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.71E+00 0.00E+00 5.71E+00 Co-58 <4.67E+00 0.00E+00 4.67E+00 Fe-59 <1.03E+01 0.00E+00 1.03E+01 Co-60 <6.71E+00 0.00E+00 6.71E+00 Zn-65 <1.30E+01 0.00E+00 1.30E+01 Zr-95 <9.32E+00 0.00E+00 9.32E+00 Nb-95 <5.46E+00 0.00E+00 5.46E+00 I-131 <8.07E+00 0.00E+00 8.07E+00 Cs-134 <7.62E+00 0.00E+00 7.62E+00 Cs-137 <5.53E+00 0.00E+00 5.53E+00 BaLa-140 <7.55E+00 0.00E+00 7.55E+00 Be-7 <4.44E+01 0.00E+00 4.44E+01 K-40 9.80E+01 4.94E+01 5.75E+01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 93 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: GROUND WATER Concentration (Activity): pCi/l 70 Sample Point 70 [ INDICATOR - E @ 0.4 miles ]

Sample ID: 467122 Sample Dates: 2/20/2018 - 2/20/2018 Nuclide Activity 2 Sigma Error MDA H3GW <-8.5E+01 0.00E+00 1.86E+02 Sample ID: 474248 Sample Dates: 5/7/2018 - 5/7/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.08E+00 0.00E+00 5.08E+00 Co-58 <5.90E+00 0.00E+00 5.90E+00 Fe-59 <1.04E+01 0.00E+00 1.04E+01 Co-60 <5.87E+00 0.00E+00 5.87E+00 Zn-65 <1.20E+01 0.00E+00 1.20E+01 Zr-95 <7.13E+00 0.00E+00 7.13E+00 Nb-95 <6.70E+00 0.00E+00 6.70E+00 I-131 <1.03E+01 0.00E+00 1.03E+01 Cs-134 <5.35E+00 0.00E+00 5.35E+00 Cs-137 <4.90E+00 0.00E+00 4.90E+00 BaLa-140 <6.62E+00 0.00E+00 6.62E+00 Be-7 1.72E+00 2.55E+01 4.75E+01 K-40 8.12E+01 5.51E+01 7.69E+01 H3GW <-2.4E+00 0.00E+00 1.83E+02 Sample ID: 481133 Sample Dates: 8/6/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <4.88E+00 0.00E+00 4.88E+00 Co-58 <3.97E+00 0.00E+00 3.97E+00 Fe-59 <1.22E+01 0.00E+00 1.22E+01 Co-60 <4.46E+00 0.00E+00 4.46E+00 Zn-65 <1.28E+01 0.00E+00 1.28E+01 Zr-95 <1.03E+01 0.00E+00 1.03E+01 Nb-95 <6.01E+00 0.00E+00 6.01E+00 I-131 <7.85E+00 0.00E+00 7.85E+00 Cs-134 <5.70E+00 0.00E+00 5.70E+00 Cs-137 <6.36E+00 0.00E+00 6.36E+00 BaLa-140 <7.62E+00 0.00E+00 7.62E+00 Be-7 <4.75E+01 0.00E+00 4.75E+01 K-40 <7.52E+01 0.00E+00 7.52E+01 H3GW <-4.9E+01 0.00E+00 1.80E+02 Sample ID: 481203 Sample Dates: 11/12/2018 - 11/12/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <4.66E+00 0.00E+00 4.66E+00 Co-58 <4.60E+00 0.00E+00 4.60E+00 Fe-59 <1.01E+01 0.00E+00 1.01E+01 Co-60 <7.22E+00 0.00E+00 7.22E+00 Zn-65 <1.17E+01 0.00E+00 1.17E+01 Zr-95 <1.14E+01 0.00E+00 1.14E+01 Nb-95 <5.27E+00 0.00E+00 5.27E+00 I-131 <8.72E+00 0.00E+00 8.72E+00 Cs-134 <6.79E+00 0.00E+00 6.79E+00 Cs-137 <3.72E+00 0.00E+00 3.72E+00 BaLa-140 <1.07E+01 0.00E+00 1.07E+01 Be-7 <3.50E+01 0.00E+00 3.50E+01 K-40 4.56E+01 7.12E+01 1.19E+02 H3GW <-7.1E+00 0.00E+00 1.84E+02 Sample Point 71 [ INDICATOR - SE @ 0.3 miles ]

Sample ID: 467123 Sample Dates: 2/19/2018 - 2/19/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.13E+00 0.00E+00 5.13E+00 Co-58 <3.69E+00 0.00E+00 3.69E+00 Fe-59 <7.70E+00 0.00E+00 7.70E+00 Co-60 <6.56E+00 0.00E+00 6.56E+00 Zn-65 <9.67E+00 0.00E+00 9.67E+00 Zr-95 <8.07E+00 0.00E+00 8.07E+00 Nb-95 <5.76E+00 0.00E+00 5.76E+00 I-131 <9.18E+00 0.00E+00 9.18E+00 Cs-134 <5.21E+00 0.00E+00 5.21E+00 Cs-137 <5.36E+00 0.00E+00 5.36E+00 BaLa-140 <9.95E+00 0.00E+00 9.95E+00 Be-7 <4.95E+01 0.00E+00 4.95E+01 K-40 <8.33E+01 0.00E+00 8.33E+01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 94 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: GROUND WATER Concentration (Activity): pCi/l 71 Sample Point 71 [ INDICATOR - SE @ 0.3 miles ]

Sample ID: 467123 Sample Dates: 2/19/2018 - 2/19/2018 Nuclide Activity 2 Sigma Error MDA H3GW <-4.3E+01 0.00E+00 1.86E+02 Sample ID: 474249 Sample Dates: 5/7/2018 - 5/7/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.65E+00 0.00E+00 5.65E+00 Co-58 <5.60E+00 0.00E+00 5.60E+00 Fe-59 <1.07E+01 0.00E+00 1.07E+01 Co-60 <5.33E+00 0.00E+00 5.33E+00 Zn-65 <1.19E+01 0.00E+00 1.19E+01 Zr-95 <1.03E+01 0.00E+00 1.03E+01 Nb-95 <5.94E+00 0.00E+00 5.94E+00 I-131 <9.16E+00 0.00E+00 9.16E+00 Cs-134 <6.46E+00 0.00E+00 6.46E+00 Cs-137 <4.58E+00 0.00E+00 4.58E+00 BaLa-140 <1.13E+01 0.00E+00 1.13E+01 Be-7 <4.63E+01 0.00E+00 4.63E+01 K-40 1.88E+02 5.38E+01 9.61E+00 H3GW <-7.8E+01 0.00E+00 1.83E+02 Sample ID: 481134 Sample Dates: 8/8/2018 - 8/8/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.70E+00 0.00E+00 5.70E+00 Co-58 <5.19E+00 0.00E+00 5.19E+00 Fe-59 <1.07E+01 0.00E+00 1.07E+01 Co-60 <8.02E+00 0.00E+00 8.02E+00 Zn-65 <8.15E+00 0.00E+00 8.15E+00 Zr-95 <8.63E+00 0.00E+00 8.63E+00 Nb-95 <6.73E+00 0.00E+00 6.73E+00 I-131 <7.71E+00 0.00E+00 7.71E+00 Cs-134 <6.38E+00 0.00E+00 6.38E+00 Cs-137 <6.27E+00 0.00E+00 6.27E+00 BaLa-140 <1.17E+01 0.00E+00 1.17E+01 Be-7 <4.34E+01 0.00E+00 4.34E+01 K-40 1.18E+02 6.37E+01 8.45E+01 H3GW <-1.1E+01 0.00E+00 1.80E+02 Sample ID: 481204 Sample Dates: 11/14/2018 - 11/14/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.32E+00 0.00E+00 5.32E+00 Co-58 <4.79E+00 0.00E+00 4.79E+00 Fe-59 <8.33E+00 0.00E+00 8.33E+00 Co-60 <5.83E+00 0.00E+00 5.83E+00 Zn-65 <1.03E+01 0.00E+00 1.03E+01 Zr-95 <9.17E+00 0.00E+00 9.17E+00 Nb-95 <5.32E+00 0.00E+00 5.32E+00 I-131 <6.71E+00 0.00E+00 6.71E+00 Cs-134 <5.71E+00 0.00E+00 5.71E+00 Cs-137 <4.52E+00 0.00E+00 4.52E+00 BaLa-140 <9.64E+00 0.00E+00 9.64E+00 Be-7 <4.63E+01 0.00E+00 4.63E+01 K-40 5.53E+01 4.85E+01 7.32E+01 H3GW <4.03E+01 0.00E+00 1.85E+02 Sample Point 72 [ INDICATOR - SE @ 0.2 miles ]

Sample ID: 467124 Sample Dates: 2/19/2018 - 2/19/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.48E+00 0.00E+00 5.48E+00 Co-58 <5.15E+00 0.00E+00 5.15E+00 Fe-59 <1.11E+01 0.00E+00 1.11E+01 Co-60 <5.44E+00 0.00E+00 5.44E+00 Zn-65 <1.24E+01 0.00E+00 1.24E+01 Zr-95 <1.14E+01 0.00E+00 1.14E+01 Nb-95 <8.01E+00 0.00E+00 8.01E+00 I-131 <8.87E+00 0.00E+00 8.87E+00 Cs-134 <5.92E+00 0.00E+00 5.92E+00 Cs-137 <6.59E+00 0.00E+00 6.59E+00 BaLa-140 <1.17E+01 0.00E+00 1.17E+01 Be-7 <4.68E+01 0.00E+00 4.68E+01 K-40 <9.46E+01 0.00E+00 9.46E+01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 95 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: GROUND WATER Concentration (Activity): pCi/l 72 Sample Point 72 [ INDICATOR - SE @ 0.2 miles ]

Sample ID: 467124 Sample Dates: 2/19/2018 - 2/19/2018 Nuclide Activity 2 Sigma Error MDA H3GW <-1.4E+01 0.00E+00 1.86E+02 Sample ID: 474250 Sample Dates: 5/8/2018 - 5/8/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <7.45E+00 0.00E+00 7.45E+00 Co-58 <5.32E+00 0.00E+00 5.32E+00 Fe-59 <1.12E+01 0.00E+00 1.12E+01 Co-60 <6.50E+00 0.00E+00 6.50E+00 Zn-65 <1.33E+01 0.00E+00 1.33E+01 Zr-95 <1.14E+01 0.00E+00 1.14E+01 Nb-95 <8.19E+00 0.00E+00 8.19E+00 I-131 <1.16E+01 0.00E+00 1.16E+01 Cs-134 <6.36E+00 0.00E+00 6.36E+00 Cs-137 <6.03E+00 0.00E+00 6.03E+00 BaLa-140 <6.96E+00 0.00E+00 6.96E+00 Be-7 <4.72E+01 0.00E+00 4.72E+01 K-40 6.55E+01 5.57E+01 8.49E+01 H3GW <3.07E+01 0.00E+00 1.84E+02 Sample ID: 481135 Sample Dates: 8/7/2018 - 8/7/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <6.20E+00 0.00E+00 6.20E+00 Co-58 <5.48E+00 0.00E+00 5.48E+00 Fe-59 <1.23E+01 0.00E+00 1.23E+01 Co-60 <6.31E+00 0.00E+00 6.31E+00 Zn-65 <1.01E+01 0.00E+00 1.01E+01 Zr-95 <9.58E+00 0.00E+00 9.58E+00 Nb-95 <5.05E+00 0.00E+00 5.05E+00 I-131 <8.80E+00 0.00E+00 8.80E+00 Cs-134 <6.24E+00 0.00E+00 6.24E+00 Cs-137 <5.56E+00 0.00E+00 5.56E+00 BaLa-140 <1.15E+01 0.00E+00 1.15E+01 Be-7 <4.96E+01 0.00E+00 4.96E+01 K-40 <8.91E+01 0.00E+00 8.91E+01 H3GW <5.81E+01 0.00E+00 1.80E+02 Sample ID: 481205 Sample Dates: 11/13/2018 - 11/13/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <6.77E+00 0.00E+00 6.77E+00 Co-58 <6.85E+00 0.00E+00 6.85E+00 Fe-59 <1.42E+01 0.00E+00 1.42E+01 Co-60 <5.58E+00 0.00E+00 5.58E+00 Zn-65 <1.48E+01 0.00E+00 1.48E+01 Zr-95 <1.20E+01 0.00E+00 1.20E+01 Nb-95 <7.71E+00 0.00E+00 7.71E+00 I-131 <1.19E+01 0.00E+00 1.19E+01 Cs-134 <6.99E+00 0.00E+00 6.99E+00 Cs-137 <4.12E+00 0.00E+00 4.12E+00 BaLa-140 <9.81E+00 0.00E+00 9.81E+00 Be-7 <5.59E+01 0.00E+00 5.59E+01 K-40 1.73E+02 8.44E+01 1.15E+02 H3GW <2.13E+01 0.00E+00 1.85E+02 Sample Point 73 [ INDICATOR - S @ 0.2 miles ]

Sample ID: 467125 Sample Dates: 2/19/2018 - 2/19/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <4.79E+00 0.00E+00 4.79E+00 Co-58 <7.07E+00 0.00E+00 7.07E+00 Fe-59 <1.09E+01 0.00E+00 1.09E+01 Co-60 <5.86E+00 0.00E+00 5.86E+00 Zn-65 <1.20E+01 0.00E+00 1.20E+01 Zr-95 <6.25E+00 0.00E+00 6.25E+00 Nb-95 <6.66E+00 0.00E+00 6.66E+00 I-131 <9.89E+00 0.00E+00 9.89E+00 Cs-134 <5.65E+00 0.00E+00 5.65E+00 Cs-137 <5.38E+00 0.00E+00 5.38E+00 BaLa-140 <8.66E+00 0.00E+00 8.66E+00 Be-7 <4.11E+01 0.00E+00 4.11E+01 K-40 9.29E+01 6.48E+01 9.43E+01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 96 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: GROUND WATER Concentration (Activity): pCi/l 73 Sample Point 73 [ INDICATOR - S @ 0.2 miles ]

Sample ID: 467125 Sample Dates: 2/19/2018 - 2/19/2018 Nuclide Activity 2 Sigma Error MDA H3GW <-4.7E+01 0.00E+00 1.85E+02 Sample ID: 474251 Sample Dates: 5/8/2018 - 5/8/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.72E+00 0.00E+00 5.72E+00 Co-58 <6.76E+00 0.00E+00 6.76E+00 Fe-59 <1.04E+01 0.00E+00 1.04E+01 Co-60 <4.61E+00 0.00E+00 4.61E+00 Zn-65 <1.21E+01 0.00E+00 1.21E+01 Zr-95 <1.01E+01 0.00E+00 1.01E+01 Nb-95 <6.38E+00 0.00E+00 6.38E+00 I-131 <1.11E+01 0.00E+00 1.11E+01 Cs-134 <7.22E+00 0.00E+00 7.22E+00 Cs-137 <5.71E+00 0.00E+00 5.71E+00 BaLa-140 <1.03E+01 0.00E+00 1.03E+01 Be-7 <5.30E+01 0.00E+00 5.30E+01 K-40 1.66E+02 6.38E+01 6.54E+01 H3GW <-7.3E+01 0.00E+00 1.83E+02 Sample ID: 481136 Sample Dates: 8/6/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.34E+00 0.00E+00 5.34E+00 Co-58 <4.88E+00 0.00E+00 4.88E+00 Fe-59 <1.19E+01 0.00E+00 1.19E+01 Co-60 <4.83E+00 0.00E+00 4.83E+00 Zn-65 <1.19E+01 0.00E+00 1.19E+01 Zr-95 <8.53E+00 0.00E+00 8.53E+00 Nb-95 <4.21E+00 0.00E+00 4.21E+00 I-131 <8.35E+00 0.00E+00 8.35E+00 Cs-134 <5.52E+00 0.00E+00 5.52E+00 Cs-137 <5.69E+00 0.00E+00 5.69E+00 BaLa-140 <9.72E+00 0.00E+00 9.72E+00 Be-7 <3.61E+01 0.00E+00 3.61E+01 K-40 4.45E+01 3.80E+01 5.51E+01 H3GW <2.92E+01 0.00E+00 1.81E+02 Sample ID: 481206 Sample Dates: 11/13/2018 - 11/13/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <3.79E+00 0.00E+00 3.79E+00 Co-58 <3.55E+00 0.00E+00 3.55E+00 Fe-59 <8.54E+00 0.00E+00 8.54E+00 Co-60 <4.30E+00 0.00E+00 4.30E+00 Zn-65 <5.92E+00 0.00E+00 5.92E+00 Zr-95 <8.09E+00 0.00E+00 8.09E+00 Nb-95 <6.55E+00 0.00E+00 6.55E+00 I-131 <9.14E+00 0.00E+00 9.14E+00 Cs-134 <4.02E+00 0.00E+00 4.02E+00 Cs-137 <5.40E+00 0.00E+00 5.40E+00 BaLa-140 <1.11E+01 0.00E+00 1.11E+01 Be-7 <4.46E+01 0.00E+00 4.46E+01 K-40 4.51E+01 4.65E+01 7.41E+01 H3GW <-1.3E+02 0.00E+00 1.84E+02 Sample Point 74 [ INDICATOR - SSE @ 0.2 miles ]

Sample ID: 467126 Sample Dates: 2/20/2018 - 2/20/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <4.96E+00 0.00E+00 4.96E+00 Co-58 <6.39E+00 0.00E+00 6.39E+00 Fe-59 <1.25E+01 0.00E+00 1.25E+01 Co-60 <5.53E+00 0.00E+00 5.53E+00 Zn-65 <1.41E+01 0.00E+00 1.41E+01 Zr-95 <8.08E+00 0.00E+00 8.08E+00 Nb-95 <6.89E+00 0.00E+00 6.89E+00 I-131 <9.34E+00 0.00E+00 9.34E+00 Cs-134 <4.69E+00 0.00E+00 4.69E+00 Cs-137 <5.61E+00 0.00E+00 5.61E+00 BaLa-140 <7.87E+00 0.00E+00 7.87E+00 Be-7 <4.17E+01 0.00E+00 4.17E+01 K-40 1.26E+02 7.61E+01 1.10E+02 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 97 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: GROUND WATER Concentration (Activity): pCi/l 74 Sample Point 74 [ INDICATOR - SSE @ 0.2 miles ]

Sample ID: 467126 Sample Dates: 2/20/2018 - 2/20/2018 Nuclide Activity 2 Sigma Error MDA H3GW <-1.4E+01 0.00E+00 1.85E+02 Sample ID: 474252 Sample Dates: 5/9/2018 - 5/9/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.53E+00 0.00E+00 5.53E+00 Co-58 <5.31E+00 0.00E+00 5.31E+00 Fe-59 <1.33E+01 0.00E+00 1.33E+01 Co-60 <3.84E+00 0.00E+00 3.84E+00 Zn-65 <1.17E+01 0.00E+00 1.17E+01 Zr-95 <9.66E+00 0.00E+00 9.66E+00 Nb-95 <5.44E+00 0.00E+00 5.44E+00 I-131 <9.06E+00 0.00E+00 9.06E+00 Cs-134 <5.96E+00 0.00E+00 5.96E+00 Cs-137 <5.73E+00 0.00E+00 5.73E+00 BaLa-140 <9.50E+00 0.00E+00 9.50E+00 Be-7 <5.28E+01 0.00E+00 5.28E+01 K-40 5.41E+01 5.24E+01 8.18E+01 H3GW <3.53E+01 0.00E+00 1.83E+02 Sample ID: 481137 Sample Dates: 8/8/2018 - 8/8/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.71E+00 0.00E+00 5.71E+00 Co-58 <5.25E+00 0.00E+00 5.25E+00 Fe-59 <1.04E+01 0.00E+00 1.04E+01 Co-60 <3.04E+00 0.00E+00 3.04E+00 Zn-65 <1.03E+01 0.00E+00 1.03E+01 Zr-95 <9.55E+00 0.00E+00 9.55E+00 Nb-95 <5.54E+00 0.00E+00 5.54E+00 I-131 <7.41E+00 0.00E+00 7.41E+00 Cs-134 <6.80E+00 0.00E+00 6.80E+00 Cs-137 <3.42E+00 0.00E+00 3.42E+00 BaLa-140 <8.94E+00 0.00E+00 8.94E+00 Be-7 <4.52E+01 0.00E+00 4.52E+01 K-40 8.43E+01 5.31E+01 7.23E+01 H3GW <3.21E+01 0.00E+00 1.84E+02 Sample ID: 481207 Sample Dates: 11/14/2018 - 11/14/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.10E+00 0.00E+00 5.10E+00 Co-58 <4.49E+00 0.00E+00 4.49E+00 Fe-59 <9.66E+00 0.00E+00 9.66E+00 Co-60 <4.96E+00 0.00E+00 4.96E+00 Zn-65 <1.33E+01 0.00E+00 1.33E+01 Zr-95 <7.84E+00 0.00E+00 7.84E+00 Nb-95 <6.05E+00 0.00E+00 6.05E+00 I-131 <6.92E+00 0.00E+00 6.92E+00 Cs-134 <5.71E+00 0.00E+00 5.71E+00 Cs-137 <5.36E+00 0.00E+00 5.36E+00 BaLa-140 <9.21E+00 0.00E+00 9.21E+00 Be-7 <4.68E+01 0.00E+00 4.68E+01 K-40 <9.29E+01 0.00E+00 9.29E+01 H3GW <-6.6E+01 0.00E+00 1.84E+02 Sample Point 75 [ INDICATOR - ESE @ 0.1 miles ]

Sample ID: 467127 Sample Dates: 2/20/2018 - 2/20/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <6.34E+00 0.00E+00 6.34E+00 Co-58 <5.13E+00 0.00E+00 5.13E+00 Fe-59 <1.34E+01 0.00E+00 1.34E+01 Co-60 <5.95E+00 0.00E+00 5.95E+00 Zn-65 <1.12E+01 0.00E+00 1.12E+01 Zr-95 <1.05E+01 0.00E+00 1.05E+01 Nb-95 <6.87E+00 0.00E+00 6.87E+00 I-131 <9.07E+00 0.00E+00 9.07E+00 Cs-134 <5.46E+00 0.00E+00 5.46E+00 Cs-137 <6.46E+00 0.00E+00 6.46E+00 BaLa-140 <7.81E+00 0.00E+00 7.81E+00 Be-7 <3.64E+01 0.00E+00 3.64E+01 K-40 1.11E+02 5.58E+01 6.72E+01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 98 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: GROUND WATER Concentration (Activity): pCi/l 75 Sample Point 75 [ INDICATOR - ESE @ 0.1 miles ]

Sample ID: 467127 Sample Dates: 2/20/2018 - 2/20/2018 Nuclide Activity 2 Sigma Error MDA H3GW <8.69E+01 0.00E+00 1.72E+02 Sample ID: 474253 Sample Dates: 5/10/2018 - 5/10/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <6.02E+00 0.00E+00 6.02E+00 Co-58 <5.81E+00 0.00E+00 5.81E+00 Fe-59 <1.38E+01 0.00E+00 1.38E+01 Co-60 <4.83E+00 0.00E+00 4.83E+00 Zn-65 <1.07E+01 0.00E+00 1.07E+01 Zr-95 <9.47E+00 0.00E+00 9.47E+00 Nb-95 <6.97E+00 0.00E+00 6.97E+00 I-131 <7.32E+00 0.00E+00 7.32E+00 Cs-134 <7.10E+00 0.00E+00 7.10E+00 Cs-137 <5.85E+00 0.00E+00 5.85E+00 BaLa-140 <1.06E+01 0.00E+00 1.06E+01 Be-7 <4.33E+01 0.00E+00 4.33E+01 K-40 9.91E+01 5.49E+01 7.15E+01 H3GW <-3.8E+01 0.00E+00 1.83E+02 Sample ID: 481138 Sample Dates: 8/7/2018 - 8/7/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <4.20E+00 0.00E+00 4.20E+00 Co-58 <5.41E+00 0.00E+00 5.41E+00 Fe-59 <7.81E+00 0.00E+00 7.81E+00 Co-60 <7.03E+00 0.00E+00 7.03E+00 Zn-65 <1.36E+01 0.00E+00 1.36E+01 Zr-95 <1.02E+01 0.00E+00 1.02E+01 Nb-95 <6.24E+00 0.00E+00 6.24E+00 I-131 <8.33E+00 0.00E+00 8.33E+00 Cs-134 <5.79E+00 0.00E+00 5.79E+00 Cs-137 <5.22E+00 0.00E+00 5.22E+00 BaLa-140 <5.64E+00 0.00E+00 5.64E+00 Be-7 <4.57E+01 0.00E+00 4.57E+01 K-40 1.61E+02 5.71E+01 4.26E+01 H3GW <-5.5E+01 0.00E+00 1.85E+02 Sample ID: 481208 Sample Dates: 11/14/2018 - 11/14/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.31E+00 0.00E+00 5.31E+00 Co-58 <5.02E+00 0.00E+00 5.02E+00 Fe-59 <9.75E+00 0.00E+00 9.75E+00 Co-60 <5.83E+00 0.00E+00 5.83E+00 Zn-65 <1.43E+01 0.00E+00 1.43E+01 Zr-95 <8.34E+00 0.00E+00 8.34E+00 Nb-95 <7.00E+00 0.00E+00 7.00E+00 I-131 <7.95E+00 0.00E+00 7.95E+00 Cs-134 <5.47E+00 0.00E+00 5.47E+00 Cs-137 <5.16E+00 0.00E+00 5.16E+00 BaLa-140 <6.28E+00 0.00E+00 6.28E+00 Be-7 <4.72E+01 0.00E+00 4.72E+01 K-40 <1.06E+02 0.00E+00 1.06E+02 H3GW <-2.4E+00 0.00E+00 1.90E+02 Sample Point 77 [ INDICATOR - S @ 0.4 miles ]

Sample ID: 467129 Sample Dates: 2/21/2018 - 2/21/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.69E+00 0.00E+00 5.69E+00 Co-58 <5.66E+00 0.00E+00 5.66E+00 Fe-59 <1.01E+01 0.00E+00 1.01E+01 Co-60 <7.00E+00 0.00E+00 7.00E+00 Zn-65 <1.19E+01 0.00E+00 1.19E+01 Zr-95 <1.05E+01 0.00E+00 1.05E+01 Nb-95 <7.06E+00 0.00E+00 7.06E+00 I-131 <7.48E+00 0.00E+00 7.48E+00 Cs-134 <5.51E+00 0.00E+00 5.51E+00 Cs-137 <5.85E+00 0.00E+00 5.85E+00 BaLa-140 <7.92E+00 0.00E+00 7.92E+00 Be-7 <3.31E+01 0.00E+00 3.31E+01 K-40 <1.03E+02 0.00E+00 1.03E+02 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 99 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: GROUND WATER Concentration (Activity): pCi/l 77 Sample Point 77 [ INDICATOR - S @ 0.4 miles ]

Sample ID: 467129 Sample Dates: 2/21/2018 - 2/21/2018 Nuclide Activity 2 Sigma Error MDA H3GW 1.74E+02 1.05E+02 1.72E+02 Sample ID: 474255 Sample Dates: 5/7/2018 - 5/7/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <4.15E+00 0.00E+00 4.15E+00 Co-58 <5.61E+00 0.00E+00 5.61E+00 Fe-59 <1.02E+01 0.00E+00 1.02E+01 Co-60 <5.44E+00 0.00E+00 5.44E+00 Zn-65 <1.11E+01 0.00E+00 1.11E+01 Zr-95 <1.12E+01 0.00E+00 1.12E+01 Nb-95 <5.85E+00 0.00E+00 5.85E+00 I-131 <9.75E+00 0.00E+00 9.75E+00 Cs-134 <4.62E+00 0.00E+00 4.62E+00 Cs-137 <4.72E+00 0.00E+00 4.72E+00 BaLa-140 <7.42E+00 0.00E+00 7.42E+00 Be-7 <4.34E+01 0.00E+00 4.34E+01 K-40 5.11E+01 6.73E+01 1.11E+02 H3GW <1.64E+02 0.00E+00 1.81E+02 Sample ID: 481140 Sample Dates: 8/6/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.64E+00 0.00E+00 5.64E+00 Co-58 <5.03E+00 0.00E+00 5.03E+00 Fe-59 <8.96E+00 0.00E+00 8.96E+00 Co-60 <5.58E+00 0.00E+00 5.58E+00 Zn-65 <1.36E+01 0.00E+00 1.36E+01 Zr-95 <1.09E+01 0.00E+00 1.09E+01 Nb-95 <6.17E+00 0.00E+00 6.17E+00 I-131 <5.67E+00 0.00E+00 5.67E+00 Cs-134 <7.18E+00 0.00E+00 7.18E+00 Cs-137 <4.41E+00 0.00E+00 4.41E+00 BaLa-140 <1.63E+00 0.00E+00 1.63E+00 Be-7 <4.32E+01 0.00E+00 4.32E+01 K-40 <7.43E+01 0.00E+00 7.43E+01 H3GW <1.16E+02 0.00E+00 1.85E+02 Sample ID: 481210 Sample Dates: 11/14/2018 - 11/14/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.88E+00 0.00E+00 5.88E+00 Co-58 <3.62E+00 0.00E+00 3.62E+00 Fe-59 <9.13E+00 0.00E+00 9.13E+00 Co-60 <5.84E+00 0.00E+00 5.84E+00 Zn-65 <1.10E+01 0.00E+00 1.10E+01 Zr-95 <8.34E+00 0.00E+00 8.34E+00 Nb-95 <5.96E+00 0.00E+00 5.96E+00 I-131 <6.41E+00 0.00E+00 6.41E+00 Cs-134 <5.70E+00 0.00E+00 5.70E+00 Cs-137 <4.72E+00 0.00E+00 4.72E+00 BaLa-140 <6.42E+00 0.00E+00 6.42E+00 Be-7 <3.70E+01 0.00E+00 3.70E+01 K-40 <9.30E+01 0.00E+00 9.30E+01 H3GW <1.39E+02 0.00E+00 1.90E+02 Sample Point 78 [ INDICATOR - S @ 0.5 miles ]

Sample ID: 467130 Sample Dates: 2/21/2018 - 2/21/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.23E+00 0.00E+00 5.23E+00 Co-58 <6.66E+00 0.00E+00 6.66E+00 Fe-59 <6.82E+00 0.00E+00 6.82E+00 Co-60 <7.02E+00 0.00E+00 7.02E+00 Zn-65 <8.45E+00 0.00E+00 8.45E+00 Zr-95 <1.19E+01 0.00E+00 1.19E+01 Nb-95 <7.59E+00 0.00E+00 7.59E+00 I-131 <7.28E+00 0.00E+00 7.28E+00 Cs-134 <6.62E+00 0.00E+00 6.62E+00 Cs-137 <7.03E+00 0.00E+00 7.03E+00 BaLa-140 <6.49E+00 0.00E+00 6.49E+00 Be-7 <4.08E+01 0.00E+00 4.08E+01 K-40 <1.19E+02 0.00E+00 1.19E+02 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 100 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: GROUND WATER Concentration (Activity): pCi/l 78 Sample Point 78 [ INDICATOR - S @ 0.5 miles ]

Sample ID: 467130 Sample Dates: 2/21/2018 - 2/21/2018 Nuclide Activity 2 Sigma Error MDA H3GW 6.76E+02 1.22E+02 1.71E+02 Sample ID: 474256 Sample Dates: 5/7/2018 - 5/7/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.13E+00 0.00E+00 5.13E+00 Co-58 <6.95E+00 0.00E+00 6.95E+00 Fe-59 <1.21E+01 0.00E+00 1.21E+01 Co-60 <4.98E+00 0.00E+00 4.98E+00 Zn-65 <1.04E+01 0.00E+00 1.04E+01 Zr-95 <1.02E+01 0.00E+00 1.02E+01 Nb-95 <5.86E+00 0.00E+00 5.86E+00 I-131 <8.69E+00 0.00E+00 8.69E+00 Cs-134 <6.99E+00 0.00E+00 6.99E+00 Cs-137 <4.72E+00 0.00E+00 4.72E+00 BaLa-140 <5.92E+00 0.00E+00 5.92E+00 Be-7 <3.97E+01 0.00E+00 3.97E+01 K-40 5.94E+01 5.83E+01 9.18E+01 H3GW 2.99E+02 1.15E+02 1.82E+02 Sample ID: 481141 Sample Dates: 8/6/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.80E+00 0.00E+00 5.80E+00 Co-58 <6.56E+00 0.00E+00 6.56E+00 Fe-59 <9.37E+00 0.00E+00 9.37E+00 Co-60 <5.95E+00 0.00E+00 5.95E+00 Zn-65 <5.51E+00 0.00E+00 5.51E+00 Zr-95 <1.01E+01 0.00E+00 1.01E+01 Nb-95 <6.12E+00 0.00E+00 6.12E+00 I-131 <8.60E+00 0.00E+00 8.60E+00 Cs-134 <7.09E+00 0.00E+00 7.09E+00 Cs-137 <6.77E+00 0.00E+00 6.77E+00 BaLa-140 <7.83E+00 0.00E+00 7.83E+00 Be-7 <3.50E+01 0.00E+00 3.50E+01 K-40 1.39E+02 5.78E+01 5.96E+01 H3GW 4.89E+02 1.23E+02 1.85E+02 Sample ID: 481211 Sample Dates: 11/14/2018 - 11/14/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.70E+00 0.00E+00 5.69E+00 Co-58 <4.68E+00 0.00E+00 4.68E+00 Fe-59 <9.44E+00 0.00E+00 9.44E+00 Co-60 <5.61E+00 0.00E+00 5.61E+00 Zn-65 <1.38E+01 0.00E+00 1.38E+01 Zr-95 <1.02E+01 0.00E+00 1.02E+01 Nb-95 <6.75E+00 0.00E+00 6.75E+00 I-131 <1.01E+01 0.00E+00 1.01E+01 Cs-134 <5.64E+00 0.00E+00 5.64E+00 Cs-137 <6.58E+00 0.00E+00 6.58E+00 BaLa-140 <8.60E+00 0.00E+00 8.60E+00 Be-7 <5.46E+01 0.00E+00 5.46E+01 K-40 9.98E+01 6.79E+01 9.94E+01 H3GW 5.08E+02 1.27E+02 1.90E+02 Sample Point 79 [ INDICATOR - S @ 0.5 miles ]

Sample ID: 467131 Sample Dates: 2/21/2018 - 2/21/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <4.49E+00 0.00E+00 4.49E+00 Co-58 <6.03E+00 0.00E+00 6.03E+00 Fe-59 <9.48E+00 0.00E+00 9.48E+00 Co-60 <6.04E+00 0.00E+00 6.04E+00 Zn-65 <1.07E+01 0.00E+00 1.07E+01 Zr-95 <8.05E+00 0.00E+00 8.05E+00 Nb-95 <5.12E+00 0.00E+00 5.12E+00 I-131 <7.95E+00 0.00E+00 7.95E+00 Cs-134 <5.51E+00 0.00E+00 5.51E+00 Cs-137 <4.57E+00 0.00E+00 4.57E+00 BaLa-140 <6.13E+00 0.00E+00 6.13E+00 Be-7 <5.02E+01 0.00E+00 5.02E+01 K-40 9.86E+01 4.35E+01 3.67E+01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 101 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: GROUND WATER Concentration (Activity): pCi/l 79 Sample Point 79 [ INDICATOR - S @ 0.5 miles ]

Sample ID: 467131 Sample Dates: 2/21/2018 - 2/21/2018 Nuclide Activity 2 Sigma Error MDA H3GW 3.91E+02 1.13E+02 1.71E+02 Sample ID: 474257 Sample Dates: 5/8/2018 - 5/8/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <3.20E+00 0.00E+00 3.20E+00 Co-58 <3.15E+00 0.00E+00 3.15E+00 Fe-59 <6.31E+00 0.00E+00 6.31E+00 Co-60 <3.16E+00 0.00E+00 3.16E+00 Zn-65 <5.72E+00 0.00E+00 5.72E+00 Zr-95 <6.41E+00 0.00E+00 6.41E+00 Nb-95 <3.50E+00 0.00E+00 3.50E+00 I-131 <8.48E+00 0.00E+00 8.48E+00 Cs-134 <3.66E+00 0.00E+00 3.66E+00 Cs-137 <3.59E+00 0.00E+00 3.59E+00 BaLa-140 <5.69E+00 0.00E+00 5.69E+00 Be-7 <2.28E+01 0.00E+00 2.28E+01 K-40 5.52E+01 3.56E+01 5.34E+01 H3GW 2.80E+02 1.15E+02 1.82E+02 Sample ID: 481142 Sample Dates: 8/6/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.28E+00 0.00E+00 5.28E+00 Co-58 <4.42E+00 0.00E+00 4.42E+00 Fe-59 <1.15E+01 0.00E+00 1.15E+01 Co-60 <8.06E+00 0.00E+00 8.06E+00 Zn-65 <1.27E+01 0.00E+00 1.27E+01 Zr-95 <1.10E+01 0.00E+00 1.10E+01 Nb-95 <7.53E+00 0.00E+00 7.53E+00 I-131 <8.21E+00 0.00E+00 8.21E+00 Cs-134 <6.14E+00 0.00E+00 6.14E+00 Cs-137 <4.89E+00 0.00E+00 4.89E+00 BaLa-140 <7.95E+00 0.00E+00 7.95E+00 Be-7 <5.12E+01 0.00E+00 5.12E+01 K-40 1.49E+02 7.16E+01 9.27E+01 H3GW 2.73E+02 1.16E+02 1.85E+02 Sample ID: 481212 Sample Dates: 11/14/2018 - 11/14/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.53E+00 0.00E+00 5.53E+00 Co-58 <6.98E+00 0.00E+00 6.98E+00 Fe-59 <9.06E+00 0.00E+00 9.06E+00 Co-60 <7.09E+00 0.00E+00 7.09E+00 Zn-65 <1.12E+01 0.00E+00 1.12E+01 Zr-95 <9.97E+00 0.00E+00 9.97E+00 Nb-95 <5.28E+00 0.00E+00 5.28E+00 I-131 <8.08E+00 0.00E+00 8.08E+00 Cs-134 <5.01E+00 0.00E+00 5.01E+00 Cs-137 <6.21E+00 0.00E+00 6.21E+00 BaLa-140 <8.06E+00 0.00E+00 8.06E+00 Be-7 <4.31E+01 0.00E+00 4.31E+01 K-40 <9.53E+01 0.00E+00 9.53E+01 H3GW 1.95E+02 1.17E+02 1.90E+02 Sample Point 80 [ INDICATOR - S @ 0.6 miles ]

Sample ID: 467132 Sample Dates: 2/21/2018 - 2/21/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <3.51E+00 0.00E+00 3.51E+00 Co-58 <6.05E+00 0.00E+00 6.05E+00 Fe-59 <8.34E+00 0.00E+00 8.34E+00 Co-60 <5.84E+00 0.00E+00 5.84E+00 Zn-65 <1.04E+01 0.00E+00 1.04E+01 Zr-95 <1.09E+01 0.00E+00 1.09E+01 Nb-95 <6.67E+00 0.00E+00 6.67E+00 I-131 <7.77E+00 0.00E+00 7.77E+00 Cs-134 <5.70E+00 0.00E+00 5.70E+00 Cs-137 <5.70E+00 0.00E+00 5.70E+00 BaLa-140 <8.21E+00 0.00E+00 8.21E+00 Be-7 <3.94E+01 0.00E+00 3.94E+01 K-40 4.14E+01 5.02E+01 8.15E+01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 102 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: GROUND WATER Concentration (Activity): pCi/l 80 Sample Point 80 [ INDICATOR - S @ 0.6 miles ]

Sample ID: 467132 Sample Dates: 2/21/2018 - 2/21/2018 Nuclide Activity 2 Sigma Error MDA H3GW 3.71E+02 1.12E+02 1.72E+02 Sample ID: 474258 Sample Dates: 5/8/2018 - 5/8/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <4.51E+00 0.00E+00 4.51E+00 Co-58 <6.45E+00 0.00E+00 6.45E+00 Fe-59 <1.19E+01 0.00E+00 1.19E+01 Co-60 <6.71E+00 0.00E+00 6.71E+00 Zn-65 <1.13E+01 0.00E+00 1.13E+01 Zr-95 <9.34E+00 0.00E+00 9.34E+00 Nb-95 <6.08E+00 0.00E+00 6.08E+00 I-131 <8.72E+00 0.00E+00 8.72E+00 Cs-134 <6.58E+00 0.00E+00 6.58E+00 Cs-137 <4.79E+00 0.00E+00 4.79E+00 BaLa-140 <9.99E+00 0.00E+00 9.99E+00 Be-7 <4.65E+01 0.00E+00 4.65E+01 K-40 6.60E+01 6.06E+01 9.47E+01 H3GW 3.11E+02 1.15E+02 1.81E+02 Sample ID: 481143 Sample Dates: 8/6/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.49E+00 0.00E+00 5.49E+00 Co-58 <4.94E+00 0.00E+00 4.94E+00 Fe-59 <8.46E+00 0.00E+00 8.46E+00 Co-60 <7.00E+00 0.00E+00 7.00E+00 Zn-65 <7.61E+00 0.00E+00 7.61E+00 Zr-95 <1.02E+01 0.00E+00 1.02E+01 Nb-95 <7.63E+00 0.00E+00 7.63E+00 I-131 <5.70E+00 0.00E+00 5.70E+00 Cs-134 <5.51E+00 0.00E+00 5.51E+00 Cs-137 <6.61E+00 0.00E+00 6.61E+00 BaLa-140 <6.15E+00 0.00E+00 6.15E+00 Be-7 <4.33E+01 0.00E+00 4.33E+01 K-40 <9.89E+01 0.00E+00 9.89E+01 H3GW 2.78E+02 1.18E+02 1.88E+02 Sample ID: 481213 Sample Dates: 11/14/2018 - 11/14/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.48E+00 0.00E+00 5.48E+00 Co-58 <4.68E+00 0.00E+00 4.68E+00 Fe-59 <9.41E+00 0.00E+00 9.41E+00 Co-60 <3.96E+00 0.00E+00 3.96E+00 Zn-65 <1.14E+01 0.00E+00 1.14E+01 Zr-95 <8.63E+00 0.00E+00 8.63E+00 Nb-95 <4.75E+00 0.00E+00 4.75E+00 I-131 <8.73E+00 0.00E+00 8.73E+00 Cs-134 <6.79E+00 0.00E+00 6.79E+00 Cs-137 <5.53E+00 0.00E+00 5.53E+00 BaLa-140 <6.65E+00 0.00E+00 6.65E+00 Be-7 <3.87E+01 0.00E+00 3.87E+01 K-40 <8.58E+01 0.00E+00 8.58E+01 H3GW 2.25E+02 1.17E+02 1.90E+02 Sample Point 81 [ INDICATOR - S @ 0.6 miles ]

Sample ID: 467133 Sample Dates: 2/21/2018 - 2/21/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.58E+00 0.00E+00 5.58E+00 Co-58 <6.08E+00 0.00E+00 6.08E+00 Fe-59 <1.04E+01 0.00E+00 1.04E+01 Co-60 <7.03E+00 0.00E+00 7.03E+00 Zn-65 <1.24E+01 0.00E+00 1.24E+01 Zr-95 <1.06E+01 0.00E+00 1.06E+01 Nb-95 <6.46E+00 0.00E+00 6.46E+00 I-131 <7.06E+00 0.00E+00 7.06E+00 Cs-134 <5.78E+00 0.00E+00 5.78E+00 Cs-137 <5.79E+00 0.00E+00 5.79E+00 BaLa-140 <7.93E+00 0.00E+00 7.93E+00 Be-7 <3.56E+01 0.00E+00 3.56E+01 K-40 7.54E+01 6.01E+01 9.05E+01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 103 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: GROUND WATER Concentration (Activity): pCi/l 81 Sample Point 81 [ INDICATOR - S @ 0.6 miles ]

Sample ID: 467133 Sample Dates: 2/21/2018 - 2/21/2018 Nuclide Activity 2 Sigma Error MDA H3GW 4.20E+02 1.14E+02 1.72E+02 Sample ID: 474259 Sample Dates: 5/8/2018 - 5/8/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.13E+00 0.00E+00 5.13E+00 Co-58 <4.65E+00 0.00E+00 4.65E+00 Fe-59 <1.27E+01 0.00E+00 1.27E+01 Co-60 <4.98E+00 0.00E+00 4.98E+00 Zn-65 <8.90E+00 0.00E+00 8.90E+00 Zr-95 <9.82E+00 0.00E+00 9.82E+00 Nb-95 <5.86E+00 0.00E+00 5.86E+00 I-131 <1.04E+01 0.00E+00 1.04E+01 Cs-134 <6.17E+00 0.00E+00 6.17E+00 Cs-137 <5.70E+00 0.00E+00 5.70E+00 BaLa-140 <8.64E+00 0.00E+00 8.64E+00 Be-7 <5.09E+01 0.00E+00 5.09E+01 K-40 2.67E+01 4.74E+01 8.10E+01 H3GW 2.68E+02 1.14E+02 1.82E+02 Sample ID: 481144 Sample Dates: 8/6/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <4.55E+00 0.00E+00 4.55E+00 Co-58 <4.75E+00 0.00E+00 4.75E+00 Fe-59 <1.28E+01 0.00E+00 1.28E+01 Co-60 <7.74E+00 0.00E+00 7.74E+00 Zn-65 <1.07E+01 0.00E+00 1.07E+01 Zr-95 <1.08E+01 0.00E+00 1.08E+01 Nb-95 <5.69E+00 0.00E+00 5.69E+00 I-131 <9.39E+00 0.00E+00 9.39E+00 Cs-134 <5.08E+00 0.00E+00 5.08E+00 Cs-137 <4.90E+00 0.00E+00 4.90E+00 BaLa-140 <8.39E+00 0.00E+00 8.39E+00 Be-7 <4.94E+01 0.00E+00 4.94E+01 K-40 <8.31E+01 0.00E+00 8.31E+01 H3GW 3.21E+02 1.17E+02 1.85E+02 Sample ID: 481214 Sample Dates: 11/14/2018 - 11/14/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <4.75E+00 0.00E+00 4.75E+00 Co-58 <4.44E+00 0.00E+00 4.44E+00 Fe-59 <9.22E+00 0.00E+00 9.22E+00 Co-60 <3.74E+00 0.00E+00 3.74E+00 Zn-65 <8.53E+00 0.00E+00 8.53E+00 Zr-95 <9.36E+00 0.00E+00 9.36E+00 Nb-95 <4.88E+00 0.00E+00 4.88E+00 I-131 <1.10E+01 0.00E+00 1.10E+01 Cs-134 <4.96E+00 0.00E+00 4.96E+00 Cs-137 <3.53E+00 0.00E+00 3.53E+00 BaLa-140 <6.46E+00 0.00E+00 6.46E+00 Be-7 <3.12E+01 0.00E+00 3.12E+01 K-40 1.15E+02 3.33E+01 4.98E+01 H3GW 2.88E+02 1.19E+02 1.90E+02 Sample Point 82 [ INDICATOR - S @ 0.6 miles ]

Sample ID: 467134 Sample Dates: 2/21/2018 - 2/21/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <3.09E+00 0.00E+00 3.09E+00 Co-58 <3.54E+00 0.00E+00 3.54E+00 Fe-59 <7.45E+00 0.00E+00 7.45E+00 Co-60 <3.50E+00 0.00E+00 3.50E+00 Zn-65 <6.44E+00 0.00E+00 6.44E+00 Zr-95 <6.53E+00 0.00E+00 6.53E+00 Nb-95 <3.76E+00 0.00E+00 3.76E+00 I-131 <4.84E+00 0.00E+00 4.84E+00 Cs-134 <4.39E+00 0.00E+00 4.39E+00 Cs-137 <2.60E+00 0.00E+00 2.60E+00 BaLa-140 <5.27E+00 0.00E+00 5.27E+00 Be-7 <3.12E+01 0.00E+00 3.12E+01 K-40 6.23E+01 3.92E+01 5.78E+01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 104 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: GROUND WATER Concentration (Activity): pCi/l 82 Sample Point 82 [ INDICATOR - S @ 0.6 miles ]

Sample ID: 467134 Sample Dates: 2/21/2018 - 2/21/2018 Nuclide Activity 2 Sigma Error MDA H3GW <9.86E+01 0.00E+00 1.72E+02 Sample ID: 474260 Sample Dates: 5/8/2018 - 5/8/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.55E+00 0.00E+00 5.55E+00 Co-58 <5.44E+00 0.00E+00 5.44E+00 Fe-59 <7.59E+00 0.00E+00 7.59E+00 Co-60 <5.28E+00 0.00E+00 5.28E+00 Zn-65 <1.08E+01 0.00E+00 1.08E+01 Zr-95 <9.14E+00 0.00E+00 9.14E+00 Nb-95 <4.41E+00 0.00E+00 4.41E+00 I-131 <1.11E+01 0.00E+00 1.11E+01 Cs-134 <5.53E+00 0.00E+00 5.53E+00 Cs-137 <5.52E+00 0.00E+00 5.52E+00 BaLa-140 <1.02E+01 0.00E+00 1.02E+01 Be-7 <3.72E+01 0.00E+00 3.72E+01 K-40 <9.03E+01 0.00E+00 9.03E+01 H3GW <1.65E+02 0.00E+00 1.82E+02 Sample ID: 481145 Sample Dates: 8/6/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.86E+00 0.00E+00 5.86E+00 Co-58 <5.10E+00 0.00E+00 5.10E+00 Fe-59 <1.25E+01 0.00E+00 1.25E+01 Co-60 <4.96E+00 0.00E+00 4.96E+00 Zn-65 <1.37E+01 0.00E+00 1.37E+01 Zr-95 <8.88E+00 0.00E+00 8.88E+00 Nb-95 <5.80E+00 0.00E+00 5.80E+00 I-131 <7.27E+00 0.00E+00 7.27E+00 Cs-134 <6.78E+00 0.00E+00 6.78E+00 Cs-137 <4.01E+00 0.00E+00 4.01E+00 BaLa-140 <6.99E+00 0.00E+00 6.99E+00 Be-7 <3.81E+01 0.00E+00 3.81E+01 K-40 <1.06E+02 0.00E+00 1.06E+02 H3GW <9.28E+01 0.00E+00 1.84E+02 Sample ID: 481215 Sample Dates: 11/13/2018 - 11/13/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <4.59E+00 0.00E+00 4.59E+00 Co-58 <4.53E+00 0.00E+00 4.53E+00 Fe-59 <9.68E+00 0.00E+00 9.68E+00 Co-60 <4.44E+00 0.00E+00 4.44E+00 Zn-65 <1.11E+01 0.00E+00 1.11E+01 Zr-95 <9.10E+00 0.00E+00 9.10E+00 Nb-95 <7.75E+00 0.00E+00 7.75E+00 I-131 <1.15E+01 0.00E+00 1.15E+01 Cs-134 <5.50E+00 0.00E+00 5.50E+00 Cs-137 <4.39E+00 0.00E+00 4.39E+00 BaLa-140 <1.06E+01 0.00E+00 1.06E+01 Be-7 <4.78E+01 0.00E+00 4.78E+01 K-40 4.87E+01 5.18E+01 8.28E+01 H3GW <3.37E+01 0.00E+00 1.90E+02 Sample Point 83 [ INDICATOR - SSW @ 1.6 miles ]

Sample ID: 467135 Sample Dates: 2/21/2018 - 2/21/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.28E+00 0.00E+00 5.28E+00 Co-58 <7.08E+00 0.00E+00 7.08E+00 Fe-59 <1.34E+01 0.00E+00 1.34E+01 Co-60 <4.15E+00 0.00E+00 4.15E+00 Zn-65 <1.44E+01 0.00E+00 1.44E+01 Zr-95 <9.41E+00 0.00E+00 9.41E+00 Nb-95 <7.47E+00 0.00E+00 7.47E+00 I-131 <8.40E+00 0.00E+00 8.40E+00 Cs-134 <8.16E+00 0.00E+00 8.16E+00 Cs-137 <8.16E+00 0.00E+00 8.16E+00 BaLa-140 <7.53E+00 0.00E+00 7.53E+00 Be-7 <4.85E+01 0.00E+00 4.85E+01 K-40 <9.53E+01 0.00E+00 9.53E+01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 105 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: GROUND WATER Concentration (Activity): pCi/l 83 Sample Point 83 [ INDICATOR - SSW @ 1.6 miles ]

Sample ID: 467135 Sample Dates: 2/21/2018 - 2/21/2018 Nuclide Activity 2 Sigma Error MDA H3GW 1.16E+03 1.36E+02 1.72E+02 Sample ID: 474261 Sample Dates: 5/8/2018 - 5/8/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.55E+00 0.00E+00 5.55E+00 Co-58 <6.00E+00 0.00E+00 6.00E+00 Fe-59 <1.15E+01 0.00E+00 1.15E+01 Co-60 <5.86E+00 0.00E+00 5.86E+00 Zn-65 <1.04E+01 0.00E+00 1.04E+01 Zr-95 <1.16E+01 0.00E+00 1.16E+01 Nb-95 <6.61E+00 0.00E+00 6.61E+00 I-131 <1.05E+01 0.00E+00 1.05E+01 Cs-134 <5.34E+00 0.00E+00 5.34E+00 Cs-137 <5.81E+00 0.00E+00 5.81E+00 BaLa-140 <8.50E+00 0.00E+00 8.50E+00 Be-7 <3.94E+01 0.00E+00 3.94E+01 K-40 <1.03E+02 0.00E+00 1.03E+02 H3GW 1.11E+03 1.39E+02 1.82E+02 Sample ID: 481146 Sample Dates: 8/6/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <6.46E+00 0.00E+00 6.46E+00 Co-58 <5.79E+00 0.00E+00 5.79E+00 Fe-59 <1.18E+01 0.00E+00 1.18E+01 Co-60 <6.68E+00 0.00E+00 6.68E+00 Zn-65 <1.44E+01 0.00E+00 1.44E+01 Zr-95 <9.73E+00 0.00E+00 9.73E+00 Nb-95 <7.86E+00 0.00E+00 7.86E+00 I-131 <7.45E+00 0.00E+00 7.45E+00 Cs-134 <6.45E+00 0.00E+00 6.45E+00 Cs-137 <7.61E+00 0.00E+00 7.61E+00 BaLa-140 <7.84E+00 0.00E+00 7.84E+00 Be-7 <5.41E+01 0.00E+00 5.41E+01 K-40 <1.19E+02 0.00E+00 1.19E+02 H3GW 1.05E+03 1.38E+02 1.85E+02 Sample ID: 481216 Sample Dates: 11/13/2018 - 11/13/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.00E+00 0.00E+00 5.00E+00 Co-58 <4.94E+00 0.00E+00 4.94E+00 Fe-59 <1.11E+01 0.00E+00 1.11E+01 Co-60 <3.95E+00 0.00E+00 3.95E+00 Zn-65 <8.62E+00 0.00E+00 8.62E+00 Zr-95 <8.32E+00 0.00E+00 8.32E+00 Nb-95 <4.65E+00 0.00E+00 4.65E+00 I-131 <1.20E+01 0.00E+00 1.20E+01 Cs-134 <4.71E+00 0.00E+00 4.71E+00 Cs-137 <4.44E+00 0.00E+00 4.44E+00 BaLa-140 <1.12E+01 0.00E+00 1.12E+01 Be-7 <3.38E+01 0.00E+00 3.38E+01 K-40 6.08E+01 3.83E+01 5.40E+01 H3GW 1.07E+03 1.42E+02 1.90E+02 Media Type: MILK Concentration (Activity): pCi/l 5 Sample Point 5 [ CONTROL - WNW @ 12 miles ]

Sample ID: 461912 Sample Dates: 1/2/2018 - 1/2/2018 Nuclide Activity 2 Sigma Error MDA LLI-131 <6.36E-01 0.00E+00 6.36E-01 I-131 <1.07E+01 0.00E+00 1.07E+01 Cs-134 <6.91E+00 0.00E+00 6.91E+00 Cs-137 <6.97E+00 0.00E+00 6.97E+00 BaLa-140 <8.02E+00 0.00E+00 8.02E+00 Be-7 <6.26E+01 0.00E+00 6.26E+01 K-40 1.16E+03 2.05E+02 1.15E+02 Sample ID: 464914 Sample Dates: 2/5/2018 - 2/5/2018 Nuclide Activity 2 Sigma Error MDA LLI-131 <6.48E-01 0.00E+00 6.48E-01 I-131 <8.57E+00 0.00E+00 8.57E+00 Cs-134 <6.67E+00 0.00E+00 6.67E+00 Cs-137 <8.89E+00 0.00E+00 8.89E+00 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 106 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: MILK Concentration (Activity): pCi/l 5 Sample Point 5 [ CONTROL - WNW @ 12 miles ]

Sample ID: 464914 Sample Dates: 2/5/2018 - 2/5/2018 Nuclide Activity 2 Sigma Error MDA BaLa-140 <8.17E+00 0.00E+00 8.17E+00 Be-7 <3.94E+01 0.00E+00 3.94E+01 K-40 1.48E+03 2.43E+02 1.30E+02 Sample ID: 466333 Sample Dates: 3/5/2018 - 3/5/2018 Nuclide Activity 2 Sigma Error MDA LLI-131 <5.49E-01 0.00E+00 5.49E-01 I-131 <8.29E+00 0.00E+00 8.29E+00 Cs-134 <8.24E+00 0.00E+00 8.24E+00 Cs-137 <6.37E+00 0.00E+00 6.37E+00 BaLa-140 <7.97E+00 0.00E+00 7.97E+00 Be-7 <4.60E+01 0.00E+00 4.60E+01 K-40 1.51E+03 2.39E+02 1.09E+02 Sample ID: 468381 Sample Dates: 4/2/2018 - 4/2/2018 Nuclide Activity 2 Sigma Error MDA LLI-131 <5.80E-01 0.00E+00 5.80E-01 I-131 <5.90E+00 0.00E+00 5.90E+00 Cs-134 <5.84E+00 0.00E+00 5.84E+00 Cs-137 <8.35E+00 0.00E+00 8.35E+00 BaLa-140 <9.16E+00 0.00E+00 9.16E+00 Be-7 <5.10E+01 0.00E+00 5.10E+01 K-40 1.42E+03 2.27E+02 8.20E+01 Sample ID: 471103 Sample Dates: 4/30/2018 - 4/30/2018 Nuclide Activity 2 Sigma Error MDA LLI-131 <6.23E-01 0.00E+00 6.23E-01 I-131 <6.76E+00 0.00E+00 6.76E+00 Cs-134 <8.33E+00 0.00E+00 8.33E+00 Cs-137 <9.55E+00 0.00E+00 9.55E+00 BaLa-140 <6.51E+00 0.00E+00 6.51E+00 Be-7 <5.22E+01 0.00E+00 5.22E+01 K-40 1.35E+03 2.24E+02 8.04E+01 Sample ID: 473574 Sample Dates: 5/29/2018 - 5/29/2018 Nuclide Activity 2 Sigma Error MDA LLI-131 <6.49E-01 0.00E+00 6.49E-01 I-131 <6.17E+00 0.00E+00 6.17E+00 Cs-134 <8.61E+00 0.00E+00 8.61E+00 Cs-137 <4.45E+00 0.00E+00 4.45E+00 BaLa-140 <7.61E+00 0.00E+00 7.61E+00 Be-7 <4.78E+01 0.00E+00 4.78E+01 K-40 1.47E+03 2.31E+02 7.44E+01 Sample ID: 474460 Sample Dates: 6/11/2018 - 6/11/2018 Nuclide Activity 2 Sigma Error MDA LLI-131 <5.37E-01 0.00E+00 5.37E-01 I-131 <5.72E+00 0.00E+00 5.72E+00 Cs-134 <6.30E+00 0.00E+00 6.30E+00 Cs-137 <6.54E+00 0.00E+00 6.54E+00 BaLa-140 <7.43E+00 0.00E+00 7.43E+00 Be-7 <4.64E+01 0.00E+00 4.64E+01 K-40 1.38E+03 2.19E+02 1.73E+01 Sample ID: 475150 Sample Dates: 6/25/2018 - 6/25/2018 Nuclide Activity 2 Sigma Error MDA LLI-131 <5.99E-01 0.00E+00 5.99E-01 I-131 <7.01E+00 0.00E+00 7.01E+00 Cs-134 <8.77E+00 0.00E+00 8.77E+00 Cs-137 <6.40E+00 0.00E+00 6.40E+00 BaLa-140 <1.05E+01 0.00E+00 1.05E+01 Be-7 <3.93E+01 0.00E+00 3.93E+01 K-40 1.38E+03 2.25E+02 9.41E+01 Sample ID: 476298 Sample Dates: 7/9/2018 - 7/9/2018 Nuclide Activity 2 Sigma Error MDA LLI-131 <6.35E-01 0.00E+00 6.35E-01 I-131 <6.62E+00 0.00E+00 6.62E+00 Cs-134 <8.80E+00 0.00E+00 8.80E+00 Cs-137 <6.43E+00 0.00E+00 6.43E+00 BaLa-140 <8.11E+00 0.00E+00 8.11E+00 Be-7 <5.46E+01 0.00E+00 5.46E+01 K-40 1.57E+03 2.46E+02 8.40E+01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 107 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: MILK Concentration (Activity): pCi/l 5 Sample Point 5 [ CONTROL - WNW @ 12 miles ]

Sample ID: 478043 Sample Dates: 7/23/2018 - 7/23/2018 Nuclide Activity 2 Sigma Error MDA LLI-131 <6.07E-01 0.00E+00 6.07E-01 I-131 <6.92E+00 0.00E+00 6.92E+00 Cs-134 <9.05E+00 0.00E+00 9.05E+00 Cs-137 <6.29E+00 0.00E+00 6.29E+00 BaLa-140 <6.31E+00 0.00E+00 6.31E+00 Be-7 <4.83E+01 0.00E+00 4.83E+01 K-40 1.52E+03 2.36E+02 7.60E+01 Sample ID: 478693 Sample Dates: 8/6/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA LLI-131 <4.52E-01 0.00E+00 4.52E-01 I-131 <1.19E+01 0.00E+00 1.19E+01 Cs-134 <7.44E+00 0.00E+00 7.44E+00 Cs-137 <6.54E+00 0.00E+00 6.54E+00 BaLa-140 <8.03E+00 0.00E+00 8.03E+00 Be-7 <7.09E+01 0.00E+00 7.09E+01 K-40 1.21E+03 2.06E+02 8.94E+01 Sample ID: 479790 Sample Dates: 8/20/2018 - 8/20/2018 Nuclide Activity 2 Sigma Error MDA LLI-131 <6.48E-01 0.00E+00 6.48E-01 I-131 <6.22E+00 0.00E+00 6.22E+00 Cs-134 <6.63E+00 0.00E+00 6.63E+00 Cs-137 <6.40E+00 0.00E+00 6.40E+00 BaLa-140 <7.73E+00 0.00E+00 7.73E+00 Be-7 <5.86E+01 0.00E+00 5.86E+01 K-40 1.54E+03 2.43E+02 1.18E+02 Sample ID: 480189 Sample Dates: 9/4/2018 - 9/4/2018 Nuclide Activity 2 Sigma Error MDA LLI-131 <6.35E-01 0.00E+00 6.35E-01 I-131 <7.24E+00 0.00E+00 7.24E+00 Cs-134 <7.40E+00 0.00E+00 7.40E+00 Cs-137 <7.36E+00 0.00E+00 7.36E+00 BaLa-140 <8.97E+00 0.00E+00 8.97E+00 Be-7 <5.87E+01 0.00E+00 5.87E+01 K-40 1.43E+03 2.23E+02 1.73E+01 Sample ID: 481454 Sample Dates: 9/17/2018 - 9/17/2018 Nuclide Activity 2 Sigma Error MDA LLI-131 <6.26E-01 0.00E+00 6.26E-01 I-131 <7.10E+00 0.00E+00 7.10E+00 Cs-134 <5.10E+00 0.00E+00 5.10E+00 Cs-137 <6.85E+00 0.00E+00 6.85E+00 BaLa-140 <6.39E+00 0.00E+00 6.39E+00 Be-7 <5.45E+01 0.00E+00 5.45E+01 K-40 1.45E+03 2.34E+02 1.09E+02 Sample ID: 482425 Sample Dates: 10/1/2018 - 10/1/2018 Nuclide Activity 2 Sigma Error MDA LLI-131 <5.90E-01 0.00E+00 5.90E-01 I-131 <6.05E+00 0.00E+00 6.05E+00 Cs-134 <8.33E+00 0.00E+00 8.33E+00 Cs-137 <9.23E+00 0.00E+00 9.23E+00 BaLa-140 <6.49E+00 0.00E+00 6.49E+00 Be-7 <5.72E+01 0.00E+00 5.72E+01 K-40 1.45E+03 2.34E+02 8.12E+01 Sample ID: 483378 Sample Dates: 10/15/2018 - 10/15/2018 Nuclide Activity 2 Sigma Error MDA LLI-131 <5.80E-01 0.00E+00 5.80E-01 I-131 <6.42E+00 0.00E+00 6.42E+00 Cs-134 <7.24E+00 0.00E+00 7.24E+00 Cs-137 <7.33E+00 0.00E+00 7.33E+00 BaLa-140 <6.07E+00 0.00E+00 6.07E+00 Be-7 <4.23E+01 0.00E+00 4.23E+01 K-40 1.54E+03 2.47E+02 1.40E+02 Sample ID: 484533 Sample Dates: 10/29/2018 - 10/29/2018 Nuclide Activity 2 Sigma Error MDA LLI-131 <5.16E-01 0.00E+00 5.16E-01 I-131 <6.01E+00 0.00E+00 6.01E+00 Cs-134 <8.25E+00 0.00E+00 8.25E+00 Cs-137 <8.21E+00 0.00E+00 8.21E+00 BaLa-140 <9.55E+00 0.00E+00 9.55E+00 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 108 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: MILK Concentration (Activity): pCi/l 5 Sample Point 5 [ CONTROL - WNW @ 12 miles ]

Sample ID: 484533 Sample Dates: 10/29/2018 - 10/29/2018 Nuclide Activity 2 Sigma Error MDA Be-7 <5.17E+01 0.00E+00 5.17E+01 K-40 1.23E+03 2.23E+02 1.42E+02 Sample ID: 485412 Sample Dates: 11/12/2018 - 11/12/2018 Nuclide Activity 2 Sigma Error MDA LLI-131 <6.29E-01 0.00E+00 6.29E-01 I-131 <6.27E+00 0.00E+00 6.27E+00 Cs-134 <8.32E+00 0.00E+00 8.32E+00 Cs-137 <7.36E+00 0.00E+00 7.36E+00 BaLa-140 <5.88E+00 0.00E+00 5.88E+00 Be-7 <5.14E+01 0.00E+00 5.14E+01 K-40 1.51E+03 2.37E+02 9.80E+01 Sample ID: 486631 Sample Dates: 12/11/2018 - 12/11/2018 Nuclide Activity 2 Sigma Error MDA LLI-131 <6.35E-01 0.00E+00 6.35E-01 I-131 <7.05E+00 0.00E+00 7.05E+00 Cs-134 <7.74E+00 0.00E+00 7.74E+00 Cs-137 <4.51E+00 0.00E+00 4.51E+00 BaLa-140 <2.34E+00 0.00E+00 2.34E+00 Be-7 <4.91E+01 0.00E+00 4.91E+01 K-40 1.60E+03 2.45E+02 9.13E+01 Sample Point 102 [ INDICATOR - W @ 2.82 miles ]

Sample ID: 473573 Sample Dates: 5/29/2018 - 5/29/2018 Nuclide Activity 2 Sigma Error MDA I-131 <7.16E+00 0.00E+00 7.16E+00 Cs-134 <9.20E+00 0.00E+00 9.20E+00 Cs-137 <6.89E+00 0.00E+00 6.89E+00 BaLa-140 <9.06E+00 0.00E+00 9.06E+00 Be-7 <7.45E+01 0.00E+00 7.45E+01 K-40 1.66E+03 2.50E+02 8.34E+01 LLI-131 <8.75E-01 0.00E+00 8.75E-01 Sample ID: 474459 Sample Dates: 6/11/2018 - 6/11/2018 Nuclide Activity 2 Sigma Error MDA I-131 <7.53E+00 0.00E+00 7.53E+00 Cs-134 <5.13E+00 0.00E+00 5.13E+00 Cs-137 <7.75E+00 0.00E+00 7.75E+00 BaLa-140 <6.13E+00 0.00E+00 6.13E+00 Be-7 <3.88E+01 0.00E+00 3.88E+01 K-40 1.87E+03 2.85E+02 1.79E+02 LLI-131 <5.35E-01 0.00E+00 5.35E-01 Sample ID: 475149 Sample Dates: 6/25/2018 - 6/25/2018 Nuclide Activity 2 Sigma Error MDA I-131 <6.85E+00 0.00E+00 6.85E+00 Cs-134 <6.88E+00 0.00E+00 6.88E+00 Cs-137 <6.96E+00 0.00E+00 6.96E+00 BaLa-140 <2.29E+00 0.00E+00 2.29E+00 Be-7 <5.89E+01 0.00E+00 5.89E+01 K-40 1.50E+03 2.30E+02 1.73E+01 LLI-131 <7.32E-01 0.00E+00 7.32E-01 Sample ID: 476297 Sample Dates: 7/9/2018 - 7/9/2018 Nuclide Activity 2 Sigma Error MDA I-131 <7.43E+00 0.00E+00 7.43E+00 Cs-134 <4.31E+00 0.00E+00 4.31E+00 Cs-137 <8.63E+00 0.00E+00 8.63E+00 BaLa-140 <8.57E+00 0.00E+00 8.57E+00 Be-7 <5.79E+01 0.00E+00 5.79E+01 K-40 1.87E+03 2.80E+02 1.17E+02 LLI-131 <5.58E-01 0.00E+00 5.58E-01 Sample ID: 478042 Sample Dates: 7/23/2018 - 7/23/2018 Nuclide Activity 2 Sigma Error MDA I-131 <5.90E+00 0.00E+00 5.90E+00 Cs-134 <7.39E+00 0.00E+00 7.39E+00 Cs-137 <9.01E+00 0.00E+00 9.01E+00 BaLa-140 <9.04E+00 0.00E+00 9.04E+00 Be-7 <4.96E+01 0.00E+00 4.96E+01 K-40 2.07E+03 2.90E+02 1.21E+02 LLI-131 <6.79E-01 0.00E+00 6.79E-01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 109 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: MILK Concentration (Activity): pCi/l 102 Sample Point 102 [ INDICATOR - W @ 2.82 miles ]

Sample ID: 478692 Sample Dates: 8/6/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA I-131 <1.25E+01 0.00E+00 1.25E+01 Cs-134 <1.15E+01 0.00E+00 1.15E+01 Cs-137 <7.34E+00 0.00E+00 7.34E+00 BaLa-140 <1.06E+01 0.00E+00 1.06E+01 Be-7 <7.02E+01 0.00E+00 7.02E+01 K-40 1.71E+03 2.56E+02 9.80E+01 LLI-131 <9.75E-01 0.00E+00 9.75E-01 Sample ID: 479789 Sample Dates: 8/20/2018 - 8/20/2018 Nuclide Activity 2 Sigma Error MDA I-131 <6.37E+00 0.00E+00 6.37E+00 Cs-134 <7.38E+00 0.00E+00 7.38E+00 Cs-137 <8.71E+00 0.00E+00 8.71E+00 BaLa-140 <5.90E+00 0.00E+00 5.90E+00 Be-7 <5.39E+01 0.00E+00 5.39E+01 K-40 1.73E+03 2.54E+02 7.96E+01 LLI-131 <6.39E-01 0.00E+00 6.39E-01 Sample ID: 480188 Sample Dates: 9/4/2018 - 9/4/2018 Nuclide Activity 2 Sigma Error MDA I-131 <6.09E+00 0.00E+00 6.09E+00 Cs-134 <1.00E+01 0.00E+00 1.00E+01 Cs-137 <6.89E+00 0.00E+00 6.89E+00 BaLa-140 <6.45E+00 0.00E+00 6.45E+00 Be-7 <5.19E+01 0.00E+00 5.19E+01 K-40 1.70E+03 2.57E+02 1.10E+02 LLI-131 <4.79E-01 0.00E+00 4.79E-01 Sample ID: 481453 Sample Dates: 9/17/2018 - 9/17/2018 Nuclide Activity 2 Sigma Error MDA I-131 <9.03E+00 0.00E+00 9.03E+00 Cs-134 <7.25E+00 0.00E+00 7.25E+00 Cs-137 <7.33E+00 0.00E+00 7.33E+00 BaLa-140 <8.23E+00 0.00E+00 8.23E+00 Be-7 <5.21E+01 0.00E+00 5.21E+01 K-40 1.65E+03 2.49E+02 7.53E+01 LLI-131 <5.28E-01 0.00E+00 5.28E-01 Sample ID: 482424 Sample Dates: 10/1/2018 - 10/1/2018 Nuclide Activity 2 Sigma Error MDA I-131 <7.50E+00 0.00E+00 7.50E+00 Cs-134 <7.79E+00 0.00E+00 7.79E+00 Cs-137 <8.51E+00 0.00E+00 8.51E+00 BaLa-140 <6.38E+00 0.00E+00 6.38E+00 Be-7 <5.92E+01 0.00E+00 5.92E+01 K-40 1.81E+03 2.70E+02 1.29E+02 LLI-131 <5.28E-01 0.00E+00 5.28E-01 Sample ID: 483377 Sample Dates: 10/15/2018 - 10/15/2018 Nuclide Activity 2 Sigma Error MDA I-131 <6.17E+00 0.00E+00 6.17E+00 Cs-134 <8.15E+00 0.00E+00 8.15E+00 Cs-137 <1.10E+01 0.00E+00 1.10E+01 BaLa-140 <7.62E+00 0.00E+00 7.62E+00 Be-7 <4.78E+01 0.00E+00 4.78E+01 K-40 1.88E+03 2.70E+02 7.62E+01 LLI-131 <7.44E-01 0.00E+00 7.44E-01 Sample ID: 484532 Sample Dates: 10/29/2018 - 10/29/2018 Nuclide Activity 2 Sigma Error MDA I-131 <4.39E+00 0.00E+00 4.39E+00 Cs-134 <5.57E+00 0.00E+00 5.57E+00 Cs-137 5.89E+00 4.06E+00 5.99E+00 BaLa-140 <4.29E+00 0.00E+00 4.29E+00 Be-7 <3.57E+01 0.00E+00 3.57E+01 K-40 2.01E+03 2.30E+02 6.48E+01 LLI-131 <9.93E-01 0.00E+00 9.93E-01 Media Type: SEDIMENT_BOTTOM Concentration (Activity): pCi/kg dry 52 Sample Point 52 [ INDICATOR - S @ 3.8 miles ]

Sample ID: 466182 Sample Dates: 1/19/2018 - 1/19/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <5.97E+01 0.00E+00 5.97E+01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 110 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: SEDIMENT_BOTTOM Concentration (Activity): pCi/kg dry 52 Sample Point 52 [ INDICATOR - S @ 3.8 miles ]

Sample ID: 466182 Sample Dates: 1/19/2018 - 1/19/2018 Nuclide Activity 2 Sigma Error MDA Co-58 <3.87E+01 0.00E+00 3.87E+01 Fe-59 <9.34E+01 0.00E+00 9.34E+01 Co-60 1.64E+02 6.19E+01 6.68E+01 Zn-65 <1.21E+02 0.00E+00 1.21E+02 Zr-95 <7.99E+01 0.00E+00 7.99E+01 Nb-95 <5.43E+01 0.00E+00 5.43E+01 I-131 <9.02E+01 0.00E+00 9.02E+01 Cs-134 <6.14E+01 0.00E+00 6.14E+01 Cs-137 8.28E+01 4.16E+01 5.49E+01 Be-7 <4.09E+02 0.00E+00 4.09E+02 K-40 7.94E+03 1.40E+03 1.05E+03 Co-57 <3.21E+01 0.00E+00 3.21E+01 Mo-99 <3.30E+03 0.00E+00 3.30E+03 Ag-110M <3.56E+01 0.00E+00 3.56E+01 Sb-122 <5.59E+02 0.00E+00 5.59E+02 Sb-125 <1.12E+02 0.00E+00 1.12E+02 Sample ID: 479869 Sample Dates: 7/13/2018 - 7/13/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <4.44E+01 0.00E+00 4.44E+01 Co-58 <4.56E+01 0.00E+00 4.56E+01 Fe-59 <9.01E+01 0.00E+00 9.01E+01 Co-60 1.90E+02 6.58E+01 7.29E+01 Zn-65 <7.22E+01 0.00E+00 7.22E+01 Zr-95 <1.05E+02 0.00E+00 1.05E+02 Nb-95 <5.88E+01 0.00E+00 5.88E+01 I-131 <5.44E+01 0.00E+00 5.44E+01 Cs-134 <7.27E+01 0.00E+00 7.27E+01 Cs-137 1.67E+02 9.24E+01 1.42E+02 Be-7 <4.62E+02 0.00E+00 4.62E+02 K-40 1.01E+04 1.48E+03 6.99E+02 Co-57 <3.05E+01 0.00E+00 3.05E+01 Mo-99 <1.69E+03 0.00E+00 1.69E+03 Ag-110M <3.97E+01 0.00E+00 3.97E+01 Sb-122 <2.58E+02 0.00E+00 2.58E+02 Sb-125 <1.30E+02 0.00E+00 1.30E+02 Media Type: SEDIMENT_SHORE Concentration (Activity): pCi/kg dry 26 Sample Point 26 [ INDICATOR - S @ 4.6 miles ]

Sample ID: 466192 Sample Dates: 1/19/2018 - 1/19/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <2.37E+01 0.00E+00 2.37E+01 Co-58 <2.51E+01 0.00E+00 2.51E+01 Fe-59 <5.87E+01 0.00E+00 5.87E+01 Co-60 <2.04E+01 0.00E+00 2.04E+01 Zn-65 <6.79E+01 0.00E+00 6.79E+01 Zr-95 <5.56E+01 0.00E+00 5.56E+01 Nb-95 <3.01E+01 0.00E+00 3.01E+01 I-131 <4.54E+01 0.00E+00 4.54E+01 Cs-134 <3.42E+01 0.00E+00 3.42E+01 Cs-137 <2.31E+01 0.00E+00 2.31E+01 Be-7 <2.12E+02 0.00E+00 2.12E+02 K-40 1.47E+04 1.53E+03 4.09E+02 Co-57 <1.88E+01 0.00E+00 1.88E+01 Mo-99 <2.32E+03 0.00E+00 2.32E+03 Ag-110M <2.35E+01 0.00E+00 2.35E+01 Sb-122 <3.73E+02 0.00E+00 3.73E+02 Sb-125 <5.61E+01 0.00E+00 5.61E+01 Sample ID: 479876 Sample Dates: 7/13/2018 - 7/13/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <2.06E+01 0.00E+00 2.06E+01 Co-58 <1.77E+01 0.00E+00 1.77E+01 Fe-59 <3.44E+01 0.00E+00 3.44E+01 Co-60 <2.43E+01 0.00E+00 2.43E+01 Zn-65 <3.78E+01 0.00E+00 3.78E+01 Zr-95 <3.24E+01 0.00E+00 3.24E+01 Nb-95 <2.17E+01 0.00E+00 2.17E+01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 111 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: SEDIMENT_SHORE Concentration (Activity): pCi/kg dry 26 Sample Point 26 [ INDICATOR - S @ 4.6 miles ]

Sample ID: 479876 Sample Dates: 7/13/2018 - 7/13/2018 Nuclide Activity 2 Sigma Error MDA I-131 <2.18E+01 0.00E+00 2.18E+01 Cs-134 <2.32E+01 0.00E+00 2.32E+01 Cs-137 <1.86E+01 0.00E+00 1.86E+01 Be-7 1.17E+02 1.23E+02 2.00E+02 K-40 9.44E+03 1.01E+03 2.07E+02 Co-57 <1.31E+01 0.00E+00 1.31E+01 Mo-99 <5.68E+02 0.00E+00 5.68E+02 Ag-110M <1.37E+01 0.00E+00 1.37E+01 Sb-122 <9.29E+01 0.00E+00 9.29E+01 Sb-125 <3.34E+01 0.00E+00 3.34E+01 Sample Point 41 [ INDICATOR - S @ 3.8 miles ]

Sample ID: 466193 Sample Dates: 1/19/2018 - 1/19/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <1.96E+01 0.00E+00 1.96E+01 Co-58 <1.81E+01 0.00E+00 1.81E+01 Fe-59 <5.10E+01 0.00E+00 5.10E+01 Co-60 <2.09E+01 0.00E+00 2.09E+01 Zn-65 <5.47E+01 0.00E+00 5.47E+01 Zr-95 <3.54E+01 0.00E+00 3.54E+01 Nb-95 <1.96E+01 0.00E+00 1.96E+01 I-131 <2.88E+01 0.00E+00 2.88E+01 Cs-134 <2.57E+01 0.00E+00 2.57E+01 Cs-137 <2.42E+01 0.00E+00 2.42E+01 Be-7 <1.69E+02 0.00E+00 1.69E+02 K-40 1.16E+04 1.21E+03 3.05E+02 Co-57 <1.38E+01 0.00E+00 1.38E+01 Mo-99 <1.69E+03 0.00E+00 1.69E+03 Ag-110M <2.01E+01 0.00E+00 2.01E+01 Sb-122 <2.66E+02 0.00E+00 2.66E+02 Sb-125 <3.58E+01 0.00E+00 3.58E+01 Sample ID: 479877 Sample Dates: 7/13/2018 - 7/13/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <1.65E+01 0.00E+00 1.65E+01 Co-58 <1.69E+01 0.00E+00 1.69E+01 Fe-59 <4.57E+01 0.00E+00 4.57E+01 Co-60 <2.46E+01 0.00E+00 2.46E+01 Zn-65 <5.07E+01 0.00E+00 5.07E+01 Zr-95 <2.95E+01 0.00E+00 2.95E+01 Nb-95 <2.02E+01 0.00E+00 2.02E+01 I-131 <2.20E+01 0.00E+00 2.20E+01 Cs-134 <2.27E+01 0.00E+00 2.27E+01 Cs-137 <1.64E+01 0.00E+00 1.64E+01 Be-7 2.37E+02 1.36E+02 2.01E+02 K-40 1.10E+04 1.17E+03 1.43E+02 Co-57 <1.39E+01 0.00E+00 1.39E+01 Mo-99 <5.17E+02 0.00E+00 5.17E+02 Ag-110M <1.56E+01 0.00E+00 1.56E+01 Sb-122 <7.05E+01 0.00E+00 7.05E+01 Sb-125 <3.16E+01 0.00E+00 3.16E+01 Media Type: SURFACE WATER Concentration (Activity): pCi/l 26 Sample Point 26 [ INDICATOR - S @ 4.7 miles ]

Sample ID: 466968 Sample Dates: 12/26/2017 - 1/22/2018 Nuclide Activity 2 Sigma Error MDA Beta 3.96E+00 1.03E+00 1.51E+00 Mn-54 <3.79E+00 0.00E+00 3.79E+00 Co-58 <4.20E+00 0.00E+00 4.20E+00 Fe-59 <7.57E+00 0.00E+00 7.57E+00 Co-60 <3.46E+00 0.00E+00 3.46E+00 Zn-65 <7.09E+00 0.00E+00 7.09E+00 Zr-95 <6.15E+00 0.00E+00 6.15E+00 Nb-95 <4.70E+00 0.00E+00 4.70E+00 I-131 <1.18E+01 0.00E+00 1.18E+01 Cs-134 <3.18E+00 0.00E+00 3.18E+00 Cs-137 <4.20E+00 0.00E+00 4.20E+00 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 112 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: SURFACE WATER Concentration (Activity): pCi/l 26 Sample Point 26 [ INDICATOR - S @ 4.7 miles ]

Sample ID: 466968 Sample Dates: 12/26/2017 - 1/22/2018 Nuclide Activity 2 Sigma Error MDA BaLa-140 <8.10E+00 0.00E+00 8.10E+00 Be-7 <3.50E+01 0.00E+00 3.50E+01 K-40 <7.96E+01 0.00E+00 7.96E+01 H3SW 6.86E+03 2.50E+02 1.78E+02 Sample ID: 468749 Sample Dates: 1/22/2018 - 2/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 4.91E+00 1.05E+00 1.46E+00 Mn-54 <3.14E+00 0.00E+00 3.14E+00 Co-58 <3.20E+00 0.00E+00 3.20E+00 Fe-59 <8.08E+00 0.00E+00 8.08E+00 Co-60 <2.24E+00 0.00E+00 2.24E+00 Zn-65 <8.39E+00 0.00E+00 8.39E+00 Zr-95 <6.50E+00 0.00E+00 6.50E+00 Nb-95 <4.15E+00 0.00E+00 4.15E+00 I-131 <1.11E+01 0.00E+00 1.11E+01 Cs-134 <3.76E+00 0.00E+00 3.76E+00 Cs-137 <3.50E+00 0.00E+00 3.50E+00 BaLa-140 <1.00E+01 0.00E+00 1.00E+01 Be-7 <2.59E+01 0.00E+00 2.59E+01 K-40 2.99E+01 2.69E+01 4.07E+01 H3SW 1.28E+04 3.30E+02 1.85E+02 Sample ID: 471705 Sample Dates: 2/19/2018 - 3/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 4.95E+00 9.02E-01 1.20E+00 Mn-54 <3.12E+00 0.00E+00 3.12E+00 Co-58 <3.47E+00 0.00E+00 3.47E+00 Fe-59 <5.48E+00 0.00E+00 5.48E+00 Co-60 <3.26E+00 0.00E+00 3.26E+00 Zn-65 <7.08E+00 0.00E+00 7.08E+00 Zr-95 <7.03E+00 0.00E+00 7.03E+00 Nb-95 <4.46E+00 0.00E+00 4.46E+00 I-131 <1.12E+01 0.00E+00 1.12E+01 Cs-134 <3.33E+00 0.00E+00 3.33E+00 Cs-137 <3.35E+00 0.00E+00 3.35E+00 BaLa-140 <9.70E+00 0.00E+00 9.70E+00 Be-7 <2.78E+01 0.00E+00 2.78E+01 K-40 7.41E+01 2.85E+01 2.23E+01 H3SW 1.16E+04 3.15E+02 1.91E+02 Sample ID: 473623 Sample Dates: 3/19/2018 - 4/16/2018 Nuclide Activity 2 Sigma Error MDA Beta 6.67E+00 1.07E+00 1.37E+00 Mn-54 <2.93E+00 0.00E+00 2.93E+00 Co-58 <3.67E+00 0.00E+00 3.67E+00 Fe-59 <6.57E+00 0.00E+00 6.57E+00 Co-60 <3.54E+00 0.00E+00 3.54E+00 Zn-65 <6.12E+00 0.00E+00 6.12E+00 Zr-95 <5.49E+00 0.00E+00 5.49E+00 Nb-95 <3.98E+00 0.00E+00 3.98E+00 I-131 <1.20E+01 0.00E+00 1.20E+01 Cs-134 <3.79E+00 0.00E+00 3.79E+00 Cs-137 <3.31E+00 0.00E+00 3.31E+00 BaLa-140 <9.24E+00 0.00E+00 9.24E+00 Be-7 <2.76E+01 0.00E+00 2.76E+01 K-40 2.49E+01 2.25E+01 3.34E+01 H3SW 1.04E+04 2.98E+02 1.74E+02 Sample ID: 475204 Sample Dates: 4/16/2018 - 5/14/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <2.71E+00 0.00E+00 2.71E+00 Co-58 <3.28E+00 0.00E+00 3.28E+00 Fe-59 <4.95E+00 0.00E+00 4.95E+00 Co-60 <2.92E+00 0.00E+00 2.92E+00 Zn-65 <5.12E+00 0.00E+00 5.12E+00 Zr-95 <5.53E+00 0.00E+00 5.53E+00 Nb-95 <2.89E+00 0.00E+00 2.89E+00 I-131 <1.14E+01 0.00E+00 1.14E+01 Cs-134 <2.17E+00 0.00E+00 2.17E+00 Cs-137 <3.33E+00 0.00E+00 3.33E+00 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 113 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: SURFACE WATER Concentration (Activity): pCi/l 26 Sample Point 26 [ INDICATOR - S @ 4.7 miles ]

Sample ID: 475204 Sample Dates: 4/16/2018 - 5/14/2018 Nuclide Activity 2 Sigma Error MDA BaLa-140 <4.76E+00 0.00E+00 4.76E+00 Be-7 <2.26E+01 0.00E+00 2.26E+01 K-40 2.48E+01 2.70E+01 4.35E+01 H3SW 9.00E+03 2.83E+02 1.93E+02 Sample ID: 478096 Sample Dates: 5/14/2018 - 6/11/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <3.00E+00 0.00E+00 3.00E+00 Co-58 <3.45E+00 0.00E+00 3.45E+00 Fe-59 <6.14E+00 0.00E+00 6.14E+00 Co-60 <2.71E+00 0.00E+00 2.71E+00 Zn-65 <4.99E+00 0.00E+00 4.99E+00 Zr-95 <6.98E+00 0.00E+00 6.98E+00 Nb-95 <3.62E+00 0.00E+00 3.62E+00 I-131 <1.04E+01 0.00E+00 1.04E+01 Cs-134 <3.64E+00 0.00E+00 3.64E+00 Cs-137 <3.58E+00 0.00E+00 3.58E+00 BaLa-140 <4.26E+00 0.00E+00 4.26E+00 Be-7 <2.63E+01 0.00E+00 2.63E+01 K-40 5.30E+01 3.06E+01 4.19E+01 H3SW 7.89E+03 2.68E+02 1.89E+02 Sample ID: 479870 Sample Dates: 6/11/2018 - 7/9/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <2.87E+00 0.00E+00 2.87E+00 Co-58 <3.79E+00 0.00E+00 3.79E+00 Fe-59 <6.76E+00 0.00E+00 6.76E+00 Co-60 <3.40E+00 0.00E+00 3.40E+00 Zn-65 <7.06E+00 0.00E+00 7.06E+00 Zr-95 <6.47E+00 0.00E+00 6.47E+00 Nb-95 <5.09E+00 0.00E+00 5.09E+00 I-131 <1.20E+01 0.00E+00 1.20E+01 Cs-134 <3.90E+00 0.00E+00 3.90E+00 Cs-137 <3.62E+00 0.00E+00 3.62E+00 BaLa-140 <8.91E+00 0.00E+00 8.91E+00 Be-7 <2.35E+01 0.00E+00 2.35E+01 K-40 5.74E+01 3.25E+01 4.29E+01 H3SW 7.41E+03 2.54E+02 1.82E+02 Sample ID: 481949 Sample Dates: 7/9/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <2.08E+00 0.00E+00 2.08E+00 Co-58 <2.18E+00 0.00E+00 2.18E+00 Fe-59 <5.48E+00 0.00E+00 5.48E+00 Co-60 <1.81E+00 0.00E+00 1.81E+00 Zn-65 <4.89E+00 0.00E+00 4.89E+00 Zr-95 <3.90E+00 0.00E+00 3.90E+00 Nb-95 <2.59E+00 0.00E+00 2.59E+00 I-131 <1.17E+01 0.00E+00 1.17E+01 Cs-134 <2.60E+00 0.00E+00 2.60E+00 Cs-137 <2.47E+00 0.00E+00 2.47E+00 BaLa-140 <6.27E+00 0.00E+00 6.27E+00 Be-7 <1.86E+01 0.00E+00 1.86E+01 K-40 <3.12E+01 0.00E+00 3.12E+01 H3SW 7.17E+03 2.59E+02 1.89E+02 Sample ID: 484006 Sample Dates: 8/6/2018 - 9/4/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <2.75E+00 0.00E+00 2.75E+00 Co-58 <2.27E+00 0.00E+00 2.27E+00 Fe-59 <5.40E+00 0.00E+00 5.40E+00 Co-60 <2.46E+00 0.00E+00 2.46E+00 Zn-65 <4.31E+00 0.00E+00 4.31E+00 Zr-95 <5.08E+00 0.00E+00 5.08E+00 Nb-95 <3.40E+00 0.00E+00 3.40E+00 I-131 <9.40E+00 0.00E+00 9.40E+00 Cs-134 <2.98E+00 0.00E+00 2.98E+00 Cs-137 <2.48E+00 0.00E+00 2.48E+00 BaLa-140 <8.37E+00 0.00E+00 8.37E+00 Be-7 <2.48E+01 0.00E+00 2.48E+01 K-40 4.03E+01 2.06E+01 2.54E+01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 114 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: SURFACE WATER Concentration (Activity): pCi/l 26 Sample Point 26 [ INDICATOR - S @ 4.7 miles ]

Sample ID: 484006 Sample Dates: 8/6/2018 - 9/4/2018 Nuclide Activity 2 Sigma Error MDA H3SW 6.40E+03 2.52E+02 1.95E+02 Sample ID: 485251 Sample Dates: 9/4/2018 - 10/1/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <3.60E+00 0.00E+00 3.60E+00 Co-58 <4.21E+00 0.00E+00 4.21E+00 Fe-59 <5.86E+00 0.00E+00 5.86E+00 Co-60 <2.37E+00 0.00E+00 2.37E+00 Zn-65 <7.75E+00 0.00E+00 7.75E+00 Zr-95 <7.83E+00 0.00E+00 7.83E+00 Nb-95 <5.38E+00 0.00E+00 5.38E+00 I-131 <9.92E+00 0.00E+00 9.92E+00 Cs-134 <4.22E+00 0.00E+00 4.22E+00 Cs-137 <3.04E+00 0.00E+00 3.04E+00 BaLa-140 <9.42E+00 0.00E+00 9.42E+00 Be-7 <3.97E+01 0.00E+00 3.97E+01 K-40 <6.01E+01 0.00E+00 6.01E+01 H3SW 5.23E+03 2.29E+02 1.95E+02 Sample ID: 488462 Sample Dates: 10/1/2018 - 10/29/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <3.88E+00 0.00E+00 3.88E+00 Co-58 <3.57E+00 0.00E+00 3.57E+00 Fe-59 <6.98E+00 0.00E+00 6.98E+00 Co-60 <3.94E+00 0.00E+00 3.94E+00 Zn-65 <4.44E+00 0.00E+00 4.44E+00 Zr-95 <8.04E+00 0.00E+00 8.04E+00 Nb-95 <4.86E+00 0.00E+00 4.86E+00 I-131 <1.16E+01 0.00E+00 1.16E+01 Cs-134 <3.83E+00 0.00E+00 3.83E+00 Cs-137 <3.76E+00 0.00E+00 3.76E+00 BaLa-140 <9.86E+00 0.00E+00 9.86E+00 Be-7 <2.88E+01 0.00E+00 2.88E+01 K-40 <6.93E+01 0.00E+00 6.93E+01 H3SW 4.59E+03 2.17E+02 1.90E+02 Sample ID: 490143 Sample Dates: 10/29/2018 - 11/26/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <2.49E+00 0.00E+00 2.49E+00 Co-58 <2.37E+00 0.00E+00 2.37E+00 Fe-59 <6.14E+00 0.00E+00 6.14E+00 Co-60 <2.57E+00 0.00E+00 2.57E+00 Zn-65 <4.45E+00 0.00E+00 4.45E+00 Zr-95 <5.22E+00 0.00E+00 5.22E+00 Nb-95 <3.00E+00 0.00E+00 3.00E+00 I-131 <1.03E+01 0.00E+00 1.03E+01 Cs-134 <2.67E+00 0.00E+00 2.67E+00 Cs-137 <2.25E+00 0.00E+00 2.25E+00 BaLa-140 <5.72E+00 0.00E+00 5.72E+00 Be-7 <2.30E+01 0.00E+00 2.30E+01 K-40 <4.64E+01 0.00E+00 4.64E+01 H3SW 4.03E+03 2.06E+02 1.88E+02 Sample ID: 491738 Sample Dates: 11/26/2018 - 12/26/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <1.77E+00 0.00E+00 1.77E+00 Co-58 <2.08E+00 0.00E+00 2.08E+00 Fe-59 <3.83E+00 0.00E+00 3.83E+00 Co-60 <1.81E+00 0.00E+00 1.81E+00 Zn-65 <3.59E+00 0.00E+00 3.59E+00 Zr-95 <3.20E+00 0.00E+00 3.20E+00 Nb-95 <2.52E+00 0.00E+00 2.52E+00 I-131 <1.05E+01 0.00E+00 1.05E+01 Cs-134 <1.42E+00 0.00E+00 1.42E+00 Cs-137 <1.73E+00 0.00E+00 1.73E+00 BaLa-140 <4.84E+00 0.00E+00 4.84E+00 Be-7 <1.74E+01 0.00E+00 1.74E+01 K-40 2.51E+01 1.53E+01 2.26E+01 H3SW 3.62E+03 1.99E+02 1.95E+02 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 115 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: SURFACE WATER Concentration (Activity): pCi/l 40 Sample Point 40 [ INDICATOR - SSE @ 17.2 miles ]

Sample ID: 466969 Sample Dates: 12/26/2017 - 1/22/2018 Nuclide Activity 2 Sigma Error MDA Beta 4.41E+00 1.07E+00 1.55E+00 Mn-54 <3.37E+00 0.00E+00 3.37E+00 Co-58 <3.36E+00 0.00E+00 3.36E+00 Fe-59 <7.52E+00 0.00E+00 7.52E+00 Co-60 <4.30E+00 0.00E+00 4.30E+00 Zn-65 <5.99E+00 0.00E+00 5.99E+00 Zr-95 <6.61E+00 0.00E+00 6.61E+00 Nb-95 <3.76E+00 0.00E+00 3.76E+00 I-131 <1.16E+01 0.00E+00 1.16E+01 Cs-134 <3.73E+00 0.00E+00 3.73E+00 Cs-137 <4.06E+00 0.00E+00 4.06E+00 BaLa-140 <1.11E+01 0.00E+00 1.11E+01 Be-7 <4.01E+01 0.00E+00 4.01E+01 K-40 5.67E+01 3.13E+01 3.82E+01 H3SW <-1.4E+01 0.00E+00 1.78E+02 Sample ID: 468750 Sample Dates: 1/22/2018 - 2/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 6.02E+00 1.03E+00 1.30E+00 Mn-54 <3.08E+00 0.00E+00 3.08E+00 Co-58 <3.19E+00 0.00E+00 3.19E+00 Fe-59 <6.19E+00 0.00E+00 6.19E+00 Co-60 <2.62E+00 0.00E+00 2.62E+00 Zn-65 <5.29E+00 0.00E+00 5.29E+00 Zr-95 <4.88E+00 0.00E+00 4.88E+00 Nb-95 <3.92E+00 0.00E+00 3.92E+00 I-131 <1.11E+01 0.00E+00 1.11E+01 Cs-134 <3.41E+00 0.00E+00 3.41E+00 Cs-137 <3.07E+00 0.00E+00 3.07E+00 BaLa-140 <7.72E+00 0.00E+00 7.72E+00 Be-7 <2.59E+01 0.00E+00 2.59E+01 K-40 <5.99E+01 0.00E+00 5.99E+01 H3SW <-5.7E+01 0.00E+00 1.85E+02 Sample ID: 471706 Sample Dates: 2/19/2018 - 3/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 4.12E+00 8.70E-01 1.20E+00 Mn-54 <2.43E+00 0.00E+00 2.43E+00 Co-58 <2.32E+00 0.00E+00 2.32E+00 Fe-59 <5.73E+00 0.00E+00 5.73E+00 Co-60 <2.48E+00 0.00E+00 2.48E+00 Zn-65 <4.56E+00 0.00E+00 4.56E+00 Zr-95 <4.53E+00 0.00E+00 4.53E+00 Nb-95 <3.40E+00 0.00E+00 3.40E+00 I-131 <1.03E+01 0.00E+00 1.03E+01 Cs-134 <2.39E+00 0.00E+00 2.39E+00 Cs-137 <2.47E+00 0.00E+00 2.47E+00 BaLa-140 <5.45E+00 0.00E+00 5.45E+00 Be-7 <1.99E+01 0.00E+00 1.99E+01 K-40 3.58E+01 2.30E+01 3.30E+01 H3SW <-9.1E+01 0.00E+00 1.91E+02 Sample ID: 473624 Sample Dates: 3/19/2018 - 4/16/2018 Nuclide Activity 2 Sigma Error MDA Beta 3.09E+00 9.18E-01 1.35E+00 Mn-54 <4.51E+00 0.00E+00 4.51E+00 Co-58 <2.48E+00 0.00E+00 2.48E+00 Fe-59 <8.97E+00 0.00E+00 8.97E+00 Co-60 <3.87E+00 0.00E+00 3.87E+00 Zn-65 <6.37E+00 0.00E+00 6.37E+00 Zr-95 <6.67E+00 0.00E+00 6.67E+00 Nb-95 <3.23E+00 0.00E+00 3.23E+00 I-131 <1.09E+01 0.00E+00 1.09E+01 Cs-134 <4.43E+00 0.00E+00 4.43E+00 Cs-137 <4.21E+00 0.00E+00 4.21E+00 BaLa-140 <2.44E+00 0.00E+00 2.44E+00 Be-7 <5.04E+01 0.00E+00 5.04E+01 K-40 <6.80E+01 0.00E+00 6.80E+01 H3SW <4.02E+01 0.00E+00 1.74E+02 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 116 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: SURFACE WATER Concentration (Activity): pCi/l 40 Sample Point 40 [ INDICATOR - SSE @ 17.2 miles ]

Sample ID: 475205 Sample Dates: 4/16/2018 - 5/14/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <2.93E+00 0.00E+00 2.93E+00 Co-58 <2.77E+00 0.00E+00 2.77E+00 Fe-59 <7.08E+00 0.00E+00 7.08E+00 Co-60 <3.30E+00 0.00E+00 3.30E+00 Zn-65 <7.54E+00 0.00E+00 7.54E+00 Zr-95 <7.44E+00 0.00E+00 7.44E+00 Nb-95 <4.49E+00 0.00E+00 4.49E+00 I-131 <1.13E+01 0.00E+00 1.13E+01 Cs-134 <3.66E+00 0.00E+00 3.66E+00 Cs-137 <3.19E+00 0.00E+00 3.19E+00 BaLa-140 <8.27E+00 0.00E+00 8.27E+00 Be-7 <2.87E+01 0.00E+00 2.87E+01 K-40 <4.80E+01 0.00E+00 4.80E+01 H3SW <-7.1E+00 0.00E+00 1.93E+02 Sample ID: 478097 Sample Dates: 5/14/2018 - 6/11/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <2.49E+00 0.00E+00 2.49E+00 Co-58 <3.02E+00 0.00E+00 3.02E+00 Fe-59 <6.62E+00 0.00E+00 6.62E+00 Co-60 <3.18E+00 0.00E+00 3.18E+00 Zn-65 <5.21E+00 0.00E+00 5.21E+00 Zr-95 <5.35E+00 0.00E+00 5.35E+00 Nb-95 <3.99E+00 0.00E+00 3.99E+00 I-131 <1.11E+01 0.00E+00 1.11E+01 Cs-134 <3.72E+00 0.00E+00 3.72E+00 Cs-137 <2.82E+00 0.00E+00 2.82E+00 BaLa-140 <7.41E+00 0.00E+00 7.41E+00 Be-7 <3.20E+01 0.00E+00 3.20E+01 K-40 4.51E+01 2.47E+01 3.08E+01 H3SW <2.37E+01 0.00E+00 1.90E+02 Sample ID: 479871 Sample Dates: 6/11/2018 - 7/9/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <3.44E+00 0.00E+00 3.44E+00 Co-58 <2.87E+00 0.00E+00 2.87E+00 Fe-59 <6.11E+00 0.00E+00 6.11E+00 Co-60 <3.04E+00 0.00E+00 3.04E+00 Zn-65 <5.62E+00 0.00E+00 5.62E+00 Zr-95 <5.59E+00 0.00E+00 5.59E+00 Nb-95 <3.42E+00 0.00E+00 3.42E+00 I-131 <1.20E+01 0.00E+00 1.20E+01 Cs-134 <3.36E+00 0.00E+00 3.36E+00 Cs-137 <3.32E+00 0.00E+00 3.32E+00 BaLa-140 <7.64E+00 0.00E+00 7.64E+00 Be-7 <3.31E+01 0.00E+00 3.31E+01 K-40 2.98E+01 2.68E+01 4.10E+01 H3SW <3.57E+01 0.00E+00 1.81E+02 Sample ID: 481950 Sample Dates: 7/9/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <2.30E+00 0.00E+00 2.30E+00 Co-58 <2.72E+00 0.00E+00 2.72E+00 Fe-59 <5.54E+00 0.00E+00 5.54E+00 Co-60 <2.58E+00 0.00E+00 2.58E+00 Zn-65 <4.32E+00 0.00E+00 4.32E+00 Zr-95 <3.89E+00 0.00E+00 3.89E+00 Nb-95 <3.36E+00 0.00E+00 3.36E+00 I-131 <1.18E+01 0.00E+00 1.18E+01 Cs-134 <2.42E+00 0.00E+00 2.42E+00 Cs-137 <2.35E+00 0.00E+00 2.35E+00 BaLa-140 <8.13E+00 0.00E+00 8.13E+00 Be-7 <2.18E+01 0.00E+00 2.18E+01 K-40 <3.86E+01 0.00E+00 3.86E+01 H3SW <-3.6E+01 0.00E+00 1.87E+02 Sample ID: 484007 Sample Dates: 8/6/2018 - 9/4/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <2.66E+00 0.00E+00 2.66E+00 Co-58 <3.12E+00 0.00E+00 3.12E+00 Fe-59 <6.09E+00 0.00E+00 6.09E+00 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 117 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: SURFACE WATER Concentration (Activity): pCi/l 40 Sample Point 40 [ INDICATOR - SSE @ 17.2 miles ]

Sample ID: 484007 Sample Dates: 8/6/2018 - 9/4/2018 Nuclide Activity 2 Sigma Error MDA Co-60 <2.69E+00 0.00E+00 2.69E+00 Zn-65 <5.82E+00 0.00E+00 5.82E+00 Zr-95 <4.85E+00 0.00E+00 4.85E+00 Nb-95 <3.18E+00 0.00E+00 3.18E+00 I-131 <1.09E+01 0.00E+00 1.09E+01 Cs-134 <3.10E+00 0.00E+00 3.10E+00 Cs-137 <2.29E+00 0.00E+00 2.29E+00 BaLa-140 <6.98E+00 0.00E+00 6.98E+00 Be-7 <2.15E+01 0.00E+00 2.15E+01 K-40 <3.76E+01 0.00E+00 3.76E+01 H3SW <1.50E+02 0.00E+00 1.94E+02 Sample ID: 485252 Sample Dates: 9/4/2018 - 10/1/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <8.34E-01 0.00E+00 8.34E-01 Co-58 <9.09E-01 0.00E+00 9.09E-01 Fe-59 <2.05E+00 0.00E+00 2.05E+00 Co-60 <8.72E-01 0.00E+00 8.72E-01 Zn-65 <1.95E+00 0.00E+00 1.95E+00 Zr-95 <1.93E+00 0.00E+00 1.93E+00 Nb-95 <1.27E+00 0.00E+00 1.27E+00 I-131 <3.74E+00 0.00E+00 3.74E+00 Cs-134 <1.02E+00 0.00E+00 1.02E+00 Cs-137 <1.07E+00 0.00E+00 1.07E+00 BaLa-140 <2.54E+00 0.00E+00 2.54E+00 Be-7 <9.86E+00 0.00E+00 9.86E+00 K-40 3.97E+01 1.07E+01 1.38E+01 H3SW <4.80E+01 0.00E+00 1.98E+02 Sample ID: 488463 Sample Dates: 10/1/2018 - 10/29/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <2.86E+00 0.00E+00 2.86E+00 Co-58 <3.18E+00 0.00E+00 3.18E+00 Fe-59 <6.43E+00 0.00E+00 6.43E+00 Co-60 <2.97E+00 0.00E+00 2.97E+00 Zn-65 <6.83E+00 0.00E+00 6.83E+00 Zr-95 <6.23E+00 0.00E+00 6.23E+00 Nb-95 <3.86E+00 0.00E+00 3.86E+00 I-131 <1.13E+01 0.00E+00 1.13E+01 Cs-134 <4.06E+00 0.00E+00 4.06E+00 Cs-137 <2.44E+00 0.00E+00 2.44E+00 BaLa-140 <6.58E+00 0.00E+00 6.58E+00 Be-7 <2.76E+01 0.00E+00 2.76E+01 K-40 9.54E+01 2.97E+01 2.52E+01 H3SW <-9.5E+00 0.00E+00 1.89E+02 Sample ID: 490144 Sample Dates: 10/29/2018 - 11/26/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <3.31E+00 0.00E+00 3.31E+00 Co-58 <4.22E+00 0.00E+00 4.22E+00 Fe-59 <8.72E+00 0.00E+00 8.72E+00 Co-60 <3.11E+00 0.00E+00 3.11E+00 Zn-65 <7.44E+00 0.00E+00 7.44E+00 Zr-95 <5.99E+00 0.00E+00 5.99E+00 Nb-95 <4.15E+00 0.00E+00 4.15E+00 I-131 <1.15E+01 0.00E+00 1.15E+01 Cs-134 <3.02E+00 0.00E+00 3.02E+00 Cs-137 <2.28E+00 0.00E+00 2.28E+00 BaLa-140 <1.12E+01 0.00E+00 1.12E+01 Be-7 <3.15E+01 0.00E+00 3.15E+01 K-40 <6.68E+01 0.00E+00 6.68E+01 H3SW <1.19E+01 0.00E+00 1.89E+02 Sample ID: 491739 Sample Dates: 11/26/2018 - 12/26/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <1.50E+00 0.00E+00 1.50E+00 Co-58 <1.95E+00 0.00E+00 1.95E+00 Fe-59 <4.13E+00 0.00E+00 4.13E+00 Co-60 <1.40E+00 0.00E+00 1.40E+00 Zn-65 <3.64E+00 0.00E+00 3.64E+00 Zr-95 <3.64E+00 0.00E+00 3.64E+00 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 118 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: SURFACE WATER Concentration (Activity): pCi/l 40 Sample Point 40 [ INDICATOR - SSE @ 17.2 miles ]

Sample ID: 491739 Sample Dates: 11/26/2018 - 12/26/2018 Nuclide Activity 2 Sigma Error MDA Nb-95 <2.77E+00 0.00E+00 2.77E+00 I-131 <1.15E+01 0.00E+00 1.15E+01 Cs-134 <1.88E+00 0.00E+00 1.88E+00 Cs-137 <1.55E+00 0.00E+00 1.55E+00 BaLa-140 <5.10E+00 0.00E+00 5.10E+00 Be-7 <1.65E+01 0.00E+00 1.65E+01 K-40 6.69E+01 1.94E+01 2.36E+01 H3SW <-8.8E+01 0.00E+00 1.96E+02 Sample Point 43 [ CONTROL - SW @ 8.47 miles ]

Sample ID: 466183 Sample Dates: 12/26/2017 - 1/22/2018 Nuclide Activity 2 Sigma Error MDA Beta 5.93E+00 1.14E+00 1.56E+00 Mn-54 <2.75E+00 0.00E+00 2.75E+00 Co-58 <2.91E+00 0.00E+00 2.91E+00 Fe-59 <5.01E+00 0.00E+00 5.01E+00 Co-60 <2.63E+00 0.00E+00 2.63E+00 Zn-65 <6.26E+00 0.00E+00 6.26E+00 Zr-95 <5.94E+00 0.00E+00 5.94E+00 Nb-95 <3.89E+00 0.00E+00 3.89E+00 I-131 <1.02E+01 0.00E+00 1.02E+01 Cs-134 <3.28E+00 0.00E+00 3.28E+00 Cs-137 <3.04E+00 0.00E+00 3.04E+00 BaLa-140 <7.55E+00 0.00E+00 7.55E+00 Be-7 <2.57E+01 0.00E+00 2.57E+01 K-40 1.17E+02 3.27E+01 3.56E+01 H3SW <-2.4E+00 0.00E+00 1.78E+02 Sample ID: 468751 Sample Dates: 1/22/2018 - 2/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 5.05E+00 1.09E+00 1.53E+00 Mn-54 <3.14E+00 0.00E+00 3.14E+00 Co-58 <2.37E+00 0.00E+00 2.37E+00 Fe-59 <5.20E+00 0.00E+00 5.20E+00 Co-60 <3.43E+00 0.00E+00 3.43E+00 Zn-65 <6.32E+00 0.00E+00 6.32E+00 Zr-95 <6.83E+00 0.00E+00 6.83E+00 Nb-95 <3.71E+00 0.00E+00 3.71E+00 I-131 <1.16E+01 0.00E+00 1.16E+01 Cs-134 <3.59E+00 0.00E+00 3.59E+00 Cs-137 <3.23E+00 0.00E+00 3.23E+00 BaLa-140 <8.92E+00 0.00E+00 8.92E+00 Be-7 <2.93E+01 0.00E+00 2.93E+01 K-40 <5.36E+01 0.00E+00 5.36E+01 H3SW <4.96E+01 0.00E+00 1.85E+02 Sample ID: 471707 Sample Dates: 2/19/2018 - 3/19/2018 Nuclide Activity 2 Sigma Error MDA Beta 3.70E+00 8.52E-01 1.20E+00 Mn-54 <4.13E+00 0.00E+00 4.13E+00 Co-58 <4.99E+00 0.00E+00 4.99E+00 Fe-59 <9.24E+00 0.00E+00 9.24E+00 Co-60 <4.35E+00 0.00E+00 4.35E+00 Zn-65 <9.18E+00 0.00E+00 9.18E+00 Zr-95 <8.50E+00 0.00E+00 8.50E+00 Nb-95 <6.02E+00 0.00E+00 6.02E+00 I-131 <1.15E+01 0.00E+00 1.15E+01 Cs-134 <3.61E+00 0.00E+00 3.61E+00 Cs-137 <4.18E+00 0.00E+00 4.18E+00 BaLa-140 <1.20E+01 0.00E+00 1.20E+01 Be-7 <3.76E+01 0.00E+00 3.76E+01 K-40 <7.55E+01 0.00E+00 7.55E+01 H3SW <-1.3E+02 0.00E+00 1.91E+02 Sample ID: 473625 Sample Dates: 3/19/2018 - 4/16/2018 Nuclide Activity 2 Sigma Error MDA Beta 4.20E+00 9.64E-01 1.35E+00 Mn-54 <3.56E+00 0.00E+00 3.56E+00 Co-58 <2.86E+00 0.00E+00 2.86E+00 Fe-59 <8.10E+00 0.00E+00 8.10E+00 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 119 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: SURFACE WATER Concentration (Activity): pCi/l 43 Sample Point 43 [ CONTROL - SW @ 8.47 miles ]

Sample ID: 473625 Sample Dates: 3/19/2018 - 4/16/2018 Nuclide Activity 2 Sigma Error MDA Co-60 <2.62E+00 0.00E+00 2.62E+00 Zn-65 <7.82E+00 0.00E+00 7.82E+00 Zr-95 <6.63E+00 0.00E+00 6.63E+00 Nb-95 <3.53E+00 0.00E+00 3.53E+00 I-131 <1.17E+01 0.00E+00 1.17E+01 Cs-134 <2.54E+00 0.00E+00 2.54E+00 Cs-137 <3.86E+00 0.00E+00 3.86E+00 BaLa-140 <9.12E+00 0.00E+00 9.12E+00 Be-7 <2.38E+01 0.00E+00 2.38E+01 K-40 <5.82E+01 0.00E+00 5.82E+01 H3SW <-2.4E+01 0.00E+00 1.75E+02 Sample ID: 475206 Sample Dates: 4/16/2018 - 5/14/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <2.28E+00 0.00E+00 2.28E+00 Co-58 <2.78E+00 0.00E+00 2.78E+00 Fe-59 <6.24E+00 0.00E+00 6.24E+00 Co-60 <2.41E+00 0.00E+00 2.41E+00 Zn-65 <5.90E+00 0.00E+00 5.90E+00 Zr-95 <4.93E+00 0.00E+00 4.93E+00 Nb-95 <3.75E+00 0.00E+00 3.75E+00 I-131 <1.19E+01 0.00E+00 1.19E+01 Cs-134 <2.96E+00 0.00E+00 2.96E+00 Cs-137 <2.90E+00 0.00E+00 2.90E+00 BaLa-140 <8.55E+00 0.00E+00 8.55E+00 Be-7 <2.17E+01 0.00E+00 2.17E+01 K-40 4.60E+01 2.87E+01 4.09E+01 H3SW <-5.4E+01 0.00E+00 1.93E+02 Sample ID: 478098 Sample Dates: 5/14/2018 - 6/11/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <2.98E+00 0.00E+00 2.98E+00 Co-58 <3.85E+00 0.00E+00 3.85E+00 Fe-59 <6.91E+00 0.00E+00 6.91E+00 Co-60 <4.00E+00 0.00E+00 4.00E+00 Zn-65 <6.43E+00 0.00E+00 6.43E+00 Zr-95 <7.50E+00 0.00E+00 7.50E+00 Nb-95 <5.14E+00 0.00E+00 5.14E+00 I-131 <1.13E+01 0.00E+00 1.13E+01 Cs-134 <3.99E+00 0.00E+00 3.99E+00 Cs-137 <4.31E+00 0.00E+00 4.31E+00 BaLa-140 <8.00E+00 0.00E+00 8.00E+00 Be-7 <2.82E+01 0.00E+00 2.82E+01 K-40 <5.78E+01 0.00E+00 5.78E+01 H3SW <6.40E+01 0.00E+00 1.90E+02 Sample ID: 479872 Sample Dates: 6/11/2018 - 7/9/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <4.51E+00 0.00E+00 4.51E+00 Co-58 <4.23E+00 0.00E+00 4.23E+00 Fe-59 <1.01E+01 0.00E+00 1.01E+01 Co-60 <3.86E+00 0.00E+00 3.86E+00 Zn-65 <8.88E+00 0.00E+00 8.88E+00 Zr-95 <7.49E+00 0.00E+00 7.49E+00 Nb-95 <5.22E+00 0.00E+00 5.22E+00 I-131 <1.10E+01 0.00E+00 1.10E+01 Cs-134 <3.74E+00 0.00E+00 3.74E+00 Cs-137 <3.48E+00 0.00E+00 3.48E+00 BaLa-140 <1.18E+01 0.00E+00 1.18E+01 Be-7 <2.98E+01 0.00E+00 2.98E+01 K-40 <8.26E+01 0.00E+00 8.26E+01 H3SW <-1.6E+01 0.00E+00 1.81E+02 Sample ID: 481951 Sample Dates: 7/9/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <2.10E+00 0.00E+00 2.10E+00 Co-58 <2.01E+00 0.00E+00 2.01E+00 Fe-59 <4.32E+00 0.00E+00 4.32E+00 Co-60 <2.08E+00 0.00E+00 2.08E+00 Zn-65 <3.88E+00 0.00E+00 3.88E+00 Zr-95 <4.25E+00 0.00E+00 4.25E+00 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 120 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: SURFACE WATER Concentration (Activity): pCi/l 43 Sample Point 43 [ CONTROL - SW @ 8.47 miles ]

Sample ID: 481951 Sample Dates: 7/9/2018 - 8/6/2018 Nuclide Activity 2 Sigma Error MDA Nb-95 <3.00E+00 0.00E+00 3.00E+00 I-131 <1.06E+01 0.00E+00 1.06E+01 Cs-134 <2.35E+00 0.00E+00 2.35E+00 Cs-137 <1.95E+00 0.00E+00 1.95E+00 BaLa-140 <6.41E+00 0.00E+00 6.41E+00 Be-7 <1.84E+01 0.00E+00 1.84E+01 K-40 5.21E+01 2.13E+01 2.77E+01 H3SW <1.20E+01 0.00E+00 1.89E+02 Sample ID: 484008 Sample Dates: 8/6/2018 - 9/4/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <3.56E+00 0.00E+00 3.56E+00 Co-58 <3.64E+00 0.00E+00 3.64E+00 Fe-59 <6.15E+00 0.00E+00 6.15E+00 Co-60 <2.92E+00 0.00E+00 2.92E+00 Zn-65 <5.38E+00 0.00E+00 5.38E+00 Zr-95 <6.60E+00 0.00E+00 6.60E+00 Nb-95 <4.00E+00 0.00E+00 4.00E+00 I-131 <1.17E+01 0.00E+00 1.17E+01 Cs-134 <3.33E+00 0.00E+00 3.33E+00 Cs-137 <3.07E+00 0.00E+00 3.07E+00 BaLa-140 <6.71E+00 0.00E+00 6.71E+00 Be-7 <3.00E+01 0.00E+00 3.00E+01 K-40 6.01E+01 2.90E+01 3.63E+01 H3SW <5.94E+01 0.00E+00 1.95E+02 Sample ID: 485253 Sample Dates: 9/4/2018 - 10/1/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <3.80E+00 0.00E+00 3.80E+00 Co-58 <3.48E+00 0.00E+00 3.48E+00 Fe-59 <5.86E+00 0.00E+00 5.86E+00 Co-60 <8.71E-01 0.00E+00 8.71E-01 Zn-65 <7.75E+00 0.00E+00 7.75E+00 Zr-95 <8.85E+00 0.00E+00 8.85E+00 Nb-95 <4.19E+00 0.00E+00 4.19E+00 I-131 <1.09E+01 0.00E+00 1.09E+01 Cs-134 <3.75E+00 0.00E+00 3.75E+00 Cs-137 <3.27E+00 0.00E+00 3.27E+00 BaLa-140 <2.37E+00 0.00E+00 2.37E+00 Be-7 <4.48E+01 0.00E+00 4.48E+01 K-40 <7.83E+01 0.00E+00 7.83E+01 H3SW <-5.3E+01 0.00E+00 1.97E+02 Sample ID: 488464 Sample Dates: 10/1/2018 - 10/29/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <3.83E+00 0.00E+00 3.83E+00 Co-58 <3.28E+00 0.00E+00 3.28E+00 Fe-59 <8.66E+00 0.00E+00 8.66E+00 Co-60 <3.70E+00 0.00E+00 3.70E+00 Zn-65 <8.07E+00 0.00E+00 8.07E+00 Zr-95 <5.81E+00 0.00E+00 5.81E+00 Nb-95 <3.46E+00 0.00E+00 3.46E+00 I-131 <1.16E+01 0.00E+00 1.16E+01 Cs-134 <3.27E+00 0.00E+00 3.27E+00 Cs-137 <2.49E+00 0.00E+00 2.49E+00 BaLa-140 <6.78E+00 0.00E+00 6.78E+00 Be-7 <2.55E+01 0.00E+00 2.55E+01 K-40 <5.97E+01 0.00E+00 5.97E+01 H3SW <-3.1E+01 0.00E+00 1.91E+02 Sample ID: 490145 Sample Dates: 10/29/2018 - 11/26/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <3.23E+00 0.00E+00 3.23E+00 Co-58 <2.97E+00 0.00E+00 2.97E+00 Fe-59 <8.05E+00 0.00E+00 8.05E+00 Co-60 <3.42E+00 0.00E+00 3.42E+00 Zn-65 <6.03E+00 0.00E+00 6.03E+00 Zr-95 <6.68E+00 0.00E+00 6.68E+00 Nb-95 <4.78E+00 0.00E+00 4.78E+00 I-131 <1.16E+01 0.00E+00 1.16E+01 Cs-134 <3.67E+00 0.00E+00 3.67E+00 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 121 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: SURFACE WATER Concentration (Activity): pCi/l 43 Sample Point 43 [ CONTROL - SW @ 8.47 miles ]

Sample ID: 490145 Sample Dates: 10/29/2018 - 11/26/2018 Nuclide Activity 2 Sigma Error MDA Cs-137 <3.21E+00 0.00E+00 3.21E+00 BaLa-140 <7.68E+00 0.00E+00 7.68E+00 Be-7 <2.87E+01 0.00E+00 2.87E+01 K-40 7.98E+01 3.46E+01 4.36E+01 H3SW <-1.4E+01 0.00E+00 1.88E+02 Sample ID: 491740 Sample Dates: 11/26/2018 - 12/26/2018 Nuclide Activity 2 Sigma Error MDA Mn-54 <1.37E+00 0.00E+00 1.37E+00 Co-58 <1.68E+00 0.00E+00 1.68E+00 Fe-59 <3.12E+00 0.00E+00 3.12E+00 Co-60 <1.06E+00 0.00E+00 1.06E+00 Zn-65 <2.70E+00 0.00E+00 2.70E+00 Zr-95 <3.36E+00 0.00E+00 3.36E+00 Nb-95 <2.16E+00 0.00E+00 2.16E+00 I-131 <1.04E+01 0.00E+00 1.04E+01 Cs-134 <1.45E+00 0.00E+00 1.45E+00 Cs-137 <1.40E+00 0.00E+00 1.40E+00 BaLa-140 <5.95E+00 0.00E+00 5.95E+00 Be-7 <1.36E+01 0.00E+00 1.36E+01 K-40 1.65E+01 1.55E+01 2.48E+01 H3SW <-7.2E+01 0.00E+00 1.94E+02 Media Type: TLD Concentration (Activity): mR/Standard Quarter 1 Sample Point 1 [ INDICATOR - N @ 2.6 miles ] TLD RING TLD_INNER Sample ID: 470164 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 17.64 Sample ID: 477122 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 14.11 Sample ID: 483752 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 13.64 Sample ID: 490536 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 16.03 Sample Point 2 [ INDICATOR - NNE @ 1.4 miles ] TLD RING TLD_INNER Sample ID: 470172 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 17.45 Sample ID: 477130 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 15.74 Sample ID: 483760 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 13.63 Sample ID: 490544 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 16.14 Sample Point 3 [ INDICATOR - ENE @ 1.9 miles ] TLD RING TLD_SPEC Sample ID: 477141 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 13.69 Sample ID: 483771 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 12.07 Sample ID: 490555 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 13.87 Sample Point 4 [ INDICATOR - NNE @ 3.1 miles ] TLD RING TLD_SPEC Sample ID: 470188 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 14.62 Sample ID: 477146 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 12.13 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 122 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: TLD Concentration (Activity): mR/Standard Quarter 4 Sample Point 4 [ INDICATOR - NNE @ 3.1 miles ] TLD RING TLD_SPEC Sample ID: 483776 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 11.05 Sample ID: 490560 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 15.48 Sample Point 5 [ CONTROL - WNW @ 12 miles ] TLD RING TLD_CTRL Sample ID: 470191 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 16.72 Sample ID: 477149 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 15.61 Sample ID: 483779 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 14.51 Sample ID: 490563 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 17.68 Sample Point 6 [ INDICATOR - ENE @ 0.8 miles ] TLD RING TLD_INNER Sample ID: 470195 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 15.66 Sample ID: 477153 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 13.65 Sample ID: 483783 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 13.56 Sample ID: 490567 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 16.38 Sample Point 7 [ INDICATOR - E @ 0.7 miles ] TLD RING TLD_INNER Sample ID: 470197 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 18.99 Sample ID: 477155 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 15.64 Sample ID: 483785 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 13.21 Sample ID: 490569 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 16.31 Sample Point 8 [ INDICATOR - ESE @ 0.6 miles ] TLD RING TLD_INNER Sample ID: 470202 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 18.47 Sample ID: 477160 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 15.18 Sample ID: 483790 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 12.94 Sample ID: 490574 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 14.65 Sample Point 9 [ INDICATOR - SE @ 2.2 miles ] TLD RING TLD_INNER Sample ID: 470203 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 14.37 Sample ID: 477161 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 13.60 Sample ID: 483791 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 11.38 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 123 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: TLD Concentration (Activity): mR/Standard Quarter 9 Sample Point 9 [ INDICATOR - SE @ 2.2 miles ] TLD RING TLD_INNER Sample ID: 490575 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 13.04 Sample Point 10 [ INDICATOR - SSE @ 2.2 miles ] TLD RING TLD_INNER Sample ID: 470165 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 14.57 Sample ID: 477123 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 11.95 Sample ID: 483753 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 10.44 Sample ID: 490537 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 13.97 Sample Point 11 [ INDICATOR - S @ 0.6 miles ] TLD RING TLD_INNER Sample ID: 470166 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 16.49 Sample ID: 477124 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 11.41 Sample ID: 483754 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 12.15 Sample ID: 490538 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 14.41 Sample Point 12 [ INDICATOR - SSW @ 0.9 miles ] TLD RING TLD_INNER Sample ID: 470167 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 17.12 Sample ID: 477125 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 12.95 Sample ID: 483755 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 11.83 Sample ID: 490539 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 13.31 Sample Point 13 [ INDICATOR - WSW @ 0.7 miles ] TLD RING TLD_INNER Sample ID: 470168 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 16.15 Sample ID: 477126 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 14.11 Sample ID: 483756 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 13.05 Sample ID: 490540 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 13.67 Sample Point 14 [ INDICATOR - W @ 1.5 miles ] TLD RING TLD_INNER Sample ID: 470169 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 17.83 Sample ID: 477127 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 14.68 Sample ID: 483757 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 14.64 Sample ID: 490541 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 16.56 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 124 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: TLD Concentration (Activity): mR/Standard Quarter 15 Sample Point 15 [ INDICATOR - W @ 2 miles ] TLD RING TLD_INNER Sample ID: 470170 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 14.22 Sample ID: 477128 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 11.31 Sample ID: 483758 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 10.73 Sample ID: 490542 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 14.15 Sample Point 19 [ INDICATOR - NNE @ 5 miles ] TLD RING TLD_OUTER Sample ID: 470171 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 16.04 Sample ID: 477129 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 15.23 Sample ID: 483759 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 12.67 Sample ID: 490543 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 13.41 Sample Point 20 [ INDICATOR - NE @ 4.5 miles ] TLD RING TLD_OUTER Sample ID: 470173 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 18.35 Sample ID: 477131 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 16.37 Sample ID: 483761 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 14.18 Sample ID: 490545 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 16.8 Sample Point 21 [ INDICATOR - ENE @ 4.8 miles ] TLD RING TLD_OUTER Sample ID: 470174 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 17.43 Sample ID: 477132 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 13.59 Sample ID: 483762 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 12.56 Sample ID: 490546 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 14.97 Sample Point 22 [ INDICATOR - E @ 4.3 miles ] TLD RING TLD_OUTER Sample ID: 470175 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 14.14 Sample ID: 477133 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 12.28 Sample ID: 483763 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 11.82 Sample ID: 490547 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 14.61 Sample Point 23 [ INDICATOR - ESE @ 4.8 miles ] TLD RING TLD_OUTER Sample ID: 470176 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 16.59 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 125 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: TLD Concentration (Activity): mR/Standard Quarter 23 Sample Point 23 [ INDICATOR - ESE @ 4.8 miles ] TLD RING TLD_OUTER Sample ID: 477134 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 13.52 Sample ID: 483764 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 12.56 Sample ID: 490548 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 16.48 Sample Point 24 [ INDICATOR - SE @ 4 miles ] TLD RING TLD_OUTER Sample ID: 470177 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 14.84 Sample ID: 477135 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 12.40 Sample ID: 483765 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 12.68 Sample ID: 490549 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 13.59 Sample Point 25 [ INDICATOR - SSE @ 4.7 miles ] TLD RING TLD_OUTER Sample ID: 470178 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 17.93 Sample ID: 477136 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 13.31 Sample ID: 483766 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 12.65 Sample ID: 490550 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 14.32 Sample Point 26 [ INDICATOR - S @ 4.7 miles ] TLD RING TLD_OUTER Sample ID: 470179 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 13.73 Sample ID: 477137 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 12.82 Sample ID: 483767 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 10.66 Sample ID: 490551 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 13.17 Sample Point 27 [ INDICATOR - SSW @ 4.8 miles ] TLD RING TLD_OUTER Sample ID: 470180 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 14.74 Sample ID: 477138 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 11.17 Sample ID: 483768 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 10.95 Sample ID: 490552 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 10.39 Sample Point 28 [ INDICATOR - SW @ 4.8 miles ] TLD RING TLD_OUTER Sample ID: 470181 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 14.62 Sample ID: 477139 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 12.25 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 126 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: TLD Concentration (Activity): mR/Standard Quarter 28 Sample Point 28 [ INDICATOR - SW @ 4.8 miles ] TLD RING TLD_OUTER Sample ID: 483769 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 12.58 Sample ID: 490553 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 14.37 Sample Point 29 [ INDICATOR - WSW @ 5.7 miles ] TLD RING TLD_OUTER Sample ID: 470182 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 19.97 Sample ID: 477140 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 15.70 Sample ID: 483770 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 14.48 Sample ID: 490554 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 17.53 Sample Point 30 [ INDICATOR - W @ 5.6 miles ] TLD RING TLD_OUTER Sample ID: 470184 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 13.68 Sample ID: 477142 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 11.57 Sample ID: 483772 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 9.94 Sample ID: 490556 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 11.83 Sample Point 31 [ INDICATOR - WNW @ 4.7 miles ] TLD RING TLD_OUTER Sample ID: 470185 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 13.04 Sample ID: 477143 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 11.47 Sample ID: 483773 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 10.46 Sample ID: 490557 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 10.93 Sample Point 32 [ INDICATOR - NNW @ 6.4 miles ] TLD RING TLD_SPEC Sample ID: 470186 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 17.43 Sample ID: 477144 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 13.45 Sample ID: 483774 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 13.06 Sample ID: 490558 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 16 Sample Point 33 [ INDICATOR - NNW @ 4.5 miles ] TLD RING TLD_OUTER Sample ID: 470187 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 14.63 Sample ID: 477145 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 11.71 Sample ID: 490559 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 13.47 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 127 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: TLD Concentration (Activity): mR/Standard Quarter 48 Sample Point 48 [ INDICATOR - N @ 4.5 miles ] TLD RING TLD_OUTER Sample ID: 470189 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 17.51 Sample ID: 477147 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 14.86 Sample ID: 483777 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 13.90 Sample ID: 490561 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 17.25 Sample Point 49 [ INDICATOR - NE @ 2.5 miles ] TLD RING TLD_INNER Sample ID: 470190 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 19.97 Sample ID: 477148 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 16.44 Sample ID: 483778 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 13.23 Sample ID: 490562 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 16.73 Sample Point 50 [ INDICATOR - ESE @ 2.6 miles ] TLD RING TLD_SPEC Sample ID: 470192 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 13.99 Sample ID: 477150 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 12.13 Sample ID: 483780 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 11.23 Sample ID: 490564 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 13.2 Sample Point 53 [ INDICATOR - NW @ 5.8 miles ] TLD RING TLD_OUTER Sample ID: 470193 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 14.84 Sample ID: 477151 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 12.64 Sample ID: 483781 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 10.91 Sample ID: 490565 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 12.2 Sample Point 56 [ INDICATOR - WSW @ 3 miles ] TLD RING TLD_INNER Sample ID: 470194 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 16.04 Sample ID: 477152 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 12.11 Sample ID: 490566 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 13.09 Sample Point 63 [ INDICATOR - SW @ 0.6 miles ] TLD RING TLD_INNER Sample ID: 470196 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 22.08 Sample ID: 477154 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 14.98 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 128 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: TLD Concentration (Activity): mR/Standard Quarter 63 Sample Point 63 [ INDICATOR - SW @ 0.6 miles ] TLD RING TLD_INNER Sample ID: 483784 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 15.10 Sample ID: 490568 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 16.69 Sample Point 93 [ INDICATOR - WNW @ 2.2 miles ] TLD RING TLD_INNER Sample ID: 470204 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 18.01 Sample ID: 477162 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 14.42 Sample ID: 483792 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 18.31 Sample ID: 490576 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 15.66 Sample Point 94 [ INDICATOR - NW @ 2 miles ] TLD RING TLD_INNER Sample ID: 470205 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 18.37 Sample ID: 477163 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 17.14 Sample ID: 483793 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 15.75 Sample ID: 490577 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 18.78 Sample Point 95 [ INDICATOR - NNW @ 2 miles ] TLD RING TLD_INNER Sample ID: 470206 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 16.62 Sample ID: 477164 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 14.97 Sample ID: 483794 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 13.40 Sample ID: 490578 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 16 Sample Point 98 [ INDICATOR - E @ 5.9 miles ] TLD RING TLD_SPEC Sample ID: 470207 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 15.29 Sample ID: 477165 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 14.31 Sample ID: 483795 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 13.58 Sample ID: 490579 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 15.64 Sample Point 99 [ INDICATOR - NNE @ 5.47 miles ] TLD RING TLD_SPEC Sample ID: 470208 Sample Dates: 1/10/2018 - 4/11/2018 Nuclide Activity mR/Std Qtr 16.13 Sample ID: 477166 Sample Dates: 4/11/2018 - 7/11/2018 Nuclide Activity mR/Std Qtr 13.6 Sample ID: 483796 Sample Dates: 7/11/2018 - 10/10/2018 Nuclide Activity mR/Std Qtr 14.29 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 129 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: TLD Concentration (Activity): mR/Standard Quarter 99 Sample Point 99 [ INDICATOR - NNE @ 5.47 miles ] TLD RING TLD_SPEC Sample ID: 490580 Sample Dates: 10/10/2018 - 1/9/2019 Nuclide Activity mR/Std Qtr 15.76 Media Type: VEGETATION Concentration (Activity): pCi/kg wet 5 Sample Point 5 [ CONTROL - NNW @ 12 miles ]

Sample ID: 474881 Sample Dates: 5/7/2018 - 5/7/2018 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2.68E+01 0.00E+00 2.68E+01 Co-58 <2.58E+01 0.00E+00 2.58E+01 Fe-59 <4.65E+01 0.00E+00 4.65E+01 Co-60 <2.93E+01 0.00E+00 2.93E+01 Zn-65 <4.20E+01 0.00E+00 4.20E+01 Zr-95 <4.25E+01 0.00E+00 4.25E+01 Nb-95 <2.40E+01 0.00E+00 2.40E+01 I-131 <2.48E+01 0.00E+00 2.48E+01 Cs-134 <3.13E+01 0.00E+00 3.13E+01 Cs-137 <2.91E+01 0.00E+00 2.91E+01 BaLa-140 <4.41E+01 0.00E+00 4.41E+01 Be-7 3.57E+02 1.73E+02 2.29E+02 K-40 4.26E+03 7.41E+02 4.29E+02 Sample ID: 477367 Sample Dates: 6/4/2018 - 6/4/2018 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2.69E+01 0.00E+00 2.69E+01 Co-58 <2.22E+01 0.00E+00 2.22E+01 Fe-59 <5.10E+01 0.00E+00 5.10E+01 Co-60 <2.28E+01 0.00E+00 2.28E+01 Zn-65 <6.06E+01 0.00E+00 6.06E+01 Zr-95 <5.34E+01 0.00E+00 5.34E+01 Nb-95 <3.53E+01 0.00E+00 3.53E+01 I-131 <2.59E+01 0.00E+00 2.59E+01 Cs-134 <3.31E+01 0.00E+00 3.31E+01 Cs-137 <3.19E+01 0.00E+00 3.19E+01 BaLa-140 <3.66E+01 0.00E+00 3.66E+01 Be-7 8.44E+02 2.82E+02 3.51E+02 K-40 3.96E+03 7.44E+02 4.84E+02 Sample ID: 479049 Sample Dates: 7/2/2018 - 7/2/2018 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2.40E+01 0.00E+00 2.40E+01 Co-58 <2.56E+01 0.00E+00 2.56E+01 Fe-59 <6.50E+01 0.00E+00 6.50E+01 Co-60 <3.34E+01 0.00E+00 3.34E+01 Zn-65 <6.09E+01 0.00E+00 6.09E+01 Zr-95 <4.05E+01 0.00E+00 4.05E+01 Nb-95 <3.09E+01 0.00E+00 3.09E+01 I-131 <2.96E+01 0.00E+00 2.96E+01 Cs-134 <2.84E+01 0.00E+00 2.84E+01 Cs-137 <2.51E+01 0.00E+00 2.51E+01 BaLa-140 <3.88E+01 0.00E+00 3.88E+01 Be-7 1.42E+03 2.89E+02 2.71E+02 K-40 4.58E+03 6.77E+02 2.12E+02 Sample ID: 481944 Sample Dates: 8/6/2018 - 8/6/2018 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <3.40E+01 0.00E+00 3.40E+01 Co-58 <3.00E+01 0.00E+00 3.00E+01 Fe-59 <7.13E+01 0.00E+00 7.13E+01 Co-60 <2.19E+01 0.00E+00 2.19E+01 Zn-65 <6.96E+01 0.00E+00 6.96E+01 Zr-95 <5.00E+01 0.00E+00 5.00E+01 Nb-95 <3.48E+01 0.00E+00 3.48E+01 I-131 <4.66E+01 0.00E+00 4.66E+01 Cs-134 <3.88E+01 0.00E+00 3.88E+01 Cs-137 <3.05E+01 0.00E+00 3.05E+01 BaLa-140 <5.98E+01 0.00E+00 5.98E+01 Be-7 1.62E+03 3.63E+02 3.57E+02 K-40 3.34E+03 6.58E+02 4.08E+02 Sample ID: 484001 Sample Dates: 9/10/2018 - 9/10/2018 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <3.53E+01 0.00E+00 3.53E+01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 130 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: VEGETATION Concentration (Activity): pCi/kg wet 5 Sample Point 5 [ CONTROL - NNW @ 12 miles ]

Sample ID: 484001 Sample Dates: 9/10/2018 - 9/10/2018 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Co-58 <4.04E+01 0.00E+00 4.04E+01 Fe-59 <8.53E+01 0.00E+00 8.53E+01 Co-60 <3.89E+01 0.00E+00 3.89E+01 Zn-65 <1.06E+02 0.00E+00 1.06E+02 Zr-95 <8.01E+01 0.00E+00 8.01E+01 Nb-95 <3.95E+01 0.00E+00 3.95E+01 I-131 <4.48E+01 0.00E+00 4.48E+01 Cs-134 <4.52E+01 0.00E+00 4.52E+01 Cs-137 <2.58E+01 0.00E+00 2.58E+01 BaLa-140 <4.85E+01 0.00E+00 4.85E+01 Be-7 3.17E+03 5.70E+02 4.86E+02 K-40 4.20E+03 8.69E+02 5.87E+02 Sample ID: 486146 Sample Dates: 10/8/2018 - 10/8/2018 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <3.41E+01 0.00E+00 3.41E+01 Co-58 <2.48E+01 0.00E+00 2.48E+01 Fe-59 <5.63E+01 0.00E+00 5.63E+01 Co-60 <2.80E+01 0.00E+00 2.80E+01 Zn-65 <6.08E+01 0.00E+00 6.08E+01 Zr-95 <4.59E+01 0.00E+00 4.59E+01 Nb-95 <2.84E+01 0.00E+00 2.84E+01 I-131 <4.25E+01 0.00E+00 4.25E+01 Cs-134 <3.02E+01 0.00E+00 3.02E+01 Cs-137 <3.00E+01 0.00E+00 3.00E+01 BaLa-140 <3.33E+01 0.00E+00 3.33E+01 Be-7 2.67E+03 4.38E+02 4.00E+02 K-40 3.11E+03 5.80E+02 4.38E+02 Sample Point 12 [ INDICATOR - SSW @ 0.9 miles ]

Sample ID: 474880 Sample Dates: 5/7/2018 - 5/7/2018 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2.41E+01 0.00E+00 2.41E+01 Co-58 <2.42E+01 0.00E+00 2.42E+01 Fe-59 <6.19E+01 0.00E+00 6.19E+01 Co-60 <2.17E+01 0.00E+00 2.17E+01 Zn-65 <7.39E+01 0.00E+00 7.39E+01 Zr-95 <4.67E+01 0.00E+00 4.67E+01 Nb-95 <3.09E+01 0.00E+00 3.09E+01 I-131 <3.56E+01 0.00E+00 3.56E+01 Cs-134 <2.99E+01 0.00E+00 2.99E+01 Cs-137 <2.46E+01 0.00E+00 2.46E+01 BaLa-140 <4.00E+01 0.00E+00 4.00E+01 Be-7 4.81E+02 2.46E+02 3.54E+02 K-40 3.36E+03 6.39E+02 2.93E+02 Sample ID: 477366 Sample Dates: 6/4/2018 - 6/4/2018 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <3.53E+01 0.00E+00 3.53E+01 Co-58 <3.15E+01 0.00E+00 3.15E+01 Fe-59 <5.51E+01 0.00E+00 5.51E+01 Co-60 <3.87E+01 0.00E+00 3.87E+01 Zn-65 <6.07E+01 0.00E+00 6.07E+01 Zr-95 <7.55E+01 0.00E+00 7.55E+01 Nb-95 <3.47E+01 0.00E+00 3.47E+01 I-131 <3.98E+01 0.00E+00 3.98E+01 Cs-134 <3.96E+01 0.00E+00 3.96E+01 Cs-137 <4.71E+01 0.00E+00 4.71E+01 BaLa-140 <1.22E+01 0.00E+00 1.22E+01 Be-7 1.08E+03 3.33E+02 3.75E+02 K-40 2.55E+03 6.34E+02 3.80E+02 Sample ID: 479048 Sample Dates: 7/2/2018 - 7/2/2018 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <3.65E+01 0.00E+00 3.65E+01 Co-58 <3.48E+01 0.00E+00 3.48E+01 Fe-59 <5.80E+01 0.00E+00 5.80E+01 Co-60 <2.23E+01 0.00E+00 2.23E+01 Zn-65 <9.21E+01 0.00E+00 9.21E+01 Zr-95 <5.44E+01 0.00E+00 5.44E+01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 131 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: VEGETATION Concentration (Activity): pCi/kg wet 12 Sample Point 12 [ INDICATOR - SSW @ 0.9 miles ]

Sample ID: 479048 Sample Dates: 7/2/2018 - 7/2/2018 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Nb-95 <3.73E+01 0.00E+00 3.73E+01 I-131 <4.09E+01 0.00E+00 4.09E+01 Cs-134 <3.49E+01 0.00E+00 3.49E+01 Cs-137 <3.34E+01 0.00E+00 3.34E+01 BaLa-140 <6.11E+01 0.00E+00 6.11E+01 Be-7 1.26E+03 3.75E+02 4.45E+02 K-40 2.50E+03 6.02E+02 2.97E+02 Sample ID: 481943 Sample Dates: 8/6/2018 - 8/6/2018 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2.29E+01 0.00E+00 2.29E+01 Co-58 <2.29E+01 0.00E+00 2.29E+01 Fe-59 <3.61E+01 0.00E+00 3.61E+01 Co-60 <2.44E+01 0.00E+00 2.44E+01 Zn-65 <4.53E+01 0.00E+00 4.53E+01 Zr-95 <4.69E+01 0.00E+00 4.69E+01 Nb-95 <2.64E+01 0.00E+00 2.64E+01 I-131 <4.76E+01 0.00E+00 4.76E+01 Cs-134 <2.05E+01 0.00E+00 2.05E+01 Cs-137 <2.34E+01 0.00E+00 2.34E+01 BaLa-140 <3.81E+01 0.00E+00 3.81E+01 Be-7 2.09E+03 3.41E+02 2.88E+02 K-40 2.54E+03 4.81E+02 3.65E+02 Sample ID: 484000 Sample Dates: 9/10/2018 - 9/10/2018 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <3.63E+01 0.00E+00 3.63E+01 Co-58 <2.76E+01 0.00E+00 2.76E+01 Fe-59 <6.92E+01 0.00E+00 6.92E+01 Co-60 <3.99E+01 0.00E+00 3.99E+01 Zn-65 <8.18E+01 0.00E+00 8.18E+01 Zr-95 <5.22E+01 0.00E+00 5.22E+01 Nb-95 <3.57E+01 0.00E+00 3.57E+01 I-131 <3.85E+01 0.00E+00 3.85E+01 Cs-134 <3.85E+01 0.00E+00 3.85E+01 Cs-137 <4.01E+01 0.00E+00 4.01E+01 BaLa-140 <5.04E+01 0.00E+00 5.04E+01 Be-7 3.18E+03 5.75E+02 4.67E+02 K-40 2.87E+03 7.36E+02 6.26E+02 Sample ID: 486145 Sample Dates: 10/8/2018 - 10/8/2018 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <3.35E+01 0.00E+00 3.35E+01 Co-58 <4.06E+01 0.00E+00 4.06E+01 Fe-59 <6.93E+01 0.00E+00 6.93E+01 Co-60 <2.69E+01 0.00E+00 2.69E+01 Zn-65 <8.53E+01 0.00E+00 8.53E+01 Zr-95 <5.12E+01 0.00E+00 5.12E+01 Nb-95 <3.55E+01 0.00E+00 3.55E+01 I-131 <4.69E+01 0.00E+00 4.69E+01 Cs-134 <4.06E+01 0.00E+00 4.06E+01 Cs-137 <4.32E+01 0.00E+00 4.32E+01 BaLa-140 <6.18E+01 0.00E+00 6.18E+01 Be-7 3.71E+03 6.24E+02 5.14E+02 K-40 2.28E+03 6.96E+02 7.87E+02 Sample Point 63 [ INDICATOR - SW @ 0.6 miles ]

Sample ID: 474882 Sample Dates: 5/7/2018 - 5/7/2018 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2.48E+01 0.00E+00 2.48E+01 Co-58 <2.63E+01 0.00E+00 2.63E+01 Fe-59 <5.38E+01 0.00E+00 5.38E+01 Co-60 <2.88E+01 0.00E+00 2.88E+01 Zn-65 <6.30E+01 0.00E+00 6.30E+01 Zr-95 <4.06E+01 0.00E+00 4.06E+01 Nb-95 <2.58E+01 0.00E+00 2.58E+01 I-131 <2.68E+01 0.00E+00 2.68E+01 Cs-134 <2.78E+01 0.00E+00 2.78E+01 Cs-137 <2.09E+01 0.00E+00 2.09E+01 BaLa-140 <3.65E+01 0.00E+00 3.65E+01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 132 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: VEGETATION Concentration (Activity): pCi/kg wet 63 Sample Point 63 [ INDICATOR - SW @ 0.6 miles ]

Sample ID: 474882 Sample Dates: 5/7/2018 - 5/7/2018 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Be-7 2.91E+02 1.99E+02 2.99E+02 K-40 3.11E+03 6.29E+02 3.54E+02 Sample ID: 477368 Sample Dates: 6/4/2018 - 6/4/2018 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2.29E+01 0.00E+00 2.29E+01 Co-58 <2.11E+01 0.00E+00 2.11E+01 Fe-59 <3.40E+01 0.00E+00 3.40E+01 Co-60 <2.28E+01 0.00E+00 2.28E+01 Zn-65 <4.42E+01 0.00E+00 4.42E+01 Zr-95 <4.09E+01 0.00E+00 4.09E+01 Nb-95 <2.01E+01 0.00E+00 2.01E+01 I-131 <2.36E+01 0.00E+00 2.36E+01 Cs-134 <2.43E+01 0.00E+00 2.43E+01 Cs-137 <2.22E+01 0.00E+00 2.22E+01 BaLa-140 <1.99E+01 0.00E+00 1.99E+01 Be-7 5.91E+02 2.04E+02 2.68E+02 K-40 3.36E+03 5.41E+02 2.40E+02 Sample ID: 479050 Sample Dates: 7/2/2018 - 7/2/2018 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <5.63E+01 0.00E+00 5.63E+01 Co-58 <4.76E+01 0.00E+00 4.76E+01 Fe-59 <8.24E+01 0.00E+00 8.24E+01 Co-60 <2.90E+01 0.00E+00 2.90E+01 Zn-65 <8.28E+01 0.00E+00 8.28E+01 Zr-95 <6.22E+01 0.00E+00 6.22E+01 Nb-95 <5.06E+01 0.00E+00 5.06E+01 I-131 <4.36E+01 0.00E+00 4.36E+01 Cs-134 <3.28E+01 0.00E+00 3.28E+01 Cs-137 <4.37E+01 0.00E+00 4.37E+01 BaLa-140 <6.74E+01 0.00E+00 6.74E+01 Be-7 1.30E+03 3.76E+02 3.72E+02 K-40 2.84E+03 7.84E+02 6.64E+02 Sample ID: 481945 Sample Dates: 8/6/2018 - 8/6/2018 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <3.42E+01 0.00E+00 3.42E+01 Co-58 <2.82E+01 0.00E+00 2.82E+01 Fe-59 <6.72E+01 0.00E+00 6.72E+01 Co-60 <3.85E+01 0.00E+00 3.85E+01 Zn-65 <4.41E+01 0.00E+00 4.41E+01 Zr-95 <5.55E+01 0.00E+00 5.55E+01 Nb-95 <3.96E+01 0.00E+00 3.96E+01 I-131 <4.68E+01 0.00E+00 4.68E+01 Cs-134 <3.36E+01 0.00E+00 3.36E+01 Cs-137 <2.43E+01 0.00E+00 2.43E+01 BaLa-140 <4.22E+01 0.00E+00 4.22E+01 Be-7 1.81E+03 3.94E+02 4.09E+02 K-40 3.40E+03 7.10E+02 6.15E+02 Sample ID: 484002 Sample Dates: 9/10/2018 - 9/10/2018 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <4.59E+01 0.00E+00 4.59E+01 Co-58 <4.13E+01 0.00E+00 4.13E+01 Fe-59 <7.70E+01 0.00E+00 7.70E+01 Co-60 <4.84E+01 0.00E+00 4.84E+01 Zn-65 <8.45E+01 0.00E+00 8.45E+01 Zr-95 <7.74E+01 0.00E+00 7.74E+01 Nb-95 <4.38E+01 0.00E+00 4.38E+01 I-131 <4.79E+01 0.00E+00 4.79E+01 Cs-134 <4.60E+01 0.00E+00 4.60E+01 Cs-137 <3.80E+01 0.00E+00 3.80E+01 BaLa-140 <4.52E+01 0.00E+00 4.52E+01 Be-7 1.97E+03 4.62E+02 4.67E+02 K-40 3.23E+03 8.79E+02 9.33E+02 Sample ID: 486147 Sample Dates: 10/8/2018 - 10/8/2018 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2.67E+01 0.00E+00 2.67E+01 Co-58 <2.58E+01 0.00E+00 2.58E+01 Fe-59 <5.22E+01 0.00E+00 5.22E+01 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 133 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

HARRIS Radiological Environmental Monitoring Analysis Report - 2018 (Appendix E)

Media Type: VEGETATION Concentration (Activity): pCi/kg wet 63 Sample Point 63 [ INDICATOR - SW @ 0.6 miles ]

Sample ID: 486147 Sample Dates: 10/8/2018 - 10/8/2018 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Co-60 <3.08E+01 0.00E+00 3.08E+01 Zn-65 <6.33E+01 0.00E+00 6.33E+01 Zr-95 <5.69E+01 0.00E+00 5.69E+01 Nb-95 <3.13E+01 0.00E+00 3.13E+01 I-131 <4.46E+01 0.00E+00 4.46E+01 Cs-134 <2.91E+01 0.00E+00 2.91E+01 Cs-137 <2.19E+01 0.00E+00 2.19E+01 BaLa-140 <3.81E+01 0.00E+00 3.81E+01 Be-7 2.80E+03 4.37E+02 3.88E+02 K-40 3.08E+03 5.75E+02 4.65E+02 Report Generated @ 2/27/2019 08:35:41 EnRad Laboratories Appendix E - Page 134 of 134 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

APPENDIX F ERRATA TO PREVIOUS REPORTS 2018 Appendix F - Page 1

APPENDIX F ERRATA TO THE 2018 HNP AREOR There are no errata to be appended to the 2018 HNP AREOR.

Appendix F - Page 2

RA-19-0136, Annual Radiological Environmental Operating Report

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RA-19-0136, Annual Radiological Environmental Operating Report

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2.0 INTRODUCTION

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