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2017 Annual Radiological Environmental Operating Report (AREOR)
	ML18138A280
Person / Time
Site:	Oconee
Issue date:	05/15/2018
From:	Dills J; Duke Energy Carolinas
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	ONS-2018-025
	Download: ML18138A280 (177)
	v • d • e

{{#Wiki_filter:(, DUKE .; ENERGY~** ONS-2018-025 May 15 , 2018 U.S. Nuclear Regulatory Commission Document Control Desk Washington , DC 20555

Subject:

Duke Energy Carolinas , LLC Oconee Nuclear Station , Units 1 , 2 and 3 Docket Nos. 50-269 , 50--270 and 50-287 Johnny Dill s Plant Manager Oconee Nuclear Station Duke Energy ON01VP I 7800 Rochester Hwy Seneca , SC 29672 o: 864.873.6 4 13 t 864.873.4208 John.Dills@duke-energy.com 2017 Annual Radiological Environmental Operating Report (AREOR) Pursuant to Oconee Nuclear Station Technical Specification 5.6.2 and Selected Licensee Commitment 16.11.10 , please find the enclosed 2017 Annual Radiological Environmental Operating Report. This report covers operation of Units 1 , 2 and 3 during the 2017 calendar year. Any questions concerning this report may be directed to Kay Brocklesby at 864-873-6661. Sincerely , Johnny Dills Plant Manager Oconee Nuclear Station Enclosure U.S. Nuclear Regulatory Commission 2017 Annual Radiological Environmental Operating Report May 15, 2018 Page 2 xc (with enclosure)

Ms. Catherine Haney Administrator , Region II U.S. Nuclear Regulatory Commission Marquis One Tower 245 Peachtree Center Ave., NE, Suite 1200 Atlanta , GA 30303-1257 Mr. Eddy Crowe (by electronic mail only) NRC Senior Resident Inspector Oconee Nuclear Station Ms. Audrey Klett , Project Manager (by electronic mail only) U.S. Nuclear Regulatory Commission 11555 Rockville Pike Mail Stop OWFN/8G-9A Rockville, MD 20852 Ms. Susan E. Jenkins , Manager (by electronic mail only) Radioactive

& Infectious Waste Management SC Department. of Health and Environmental Control 2600 Bull St. Columbia, SC 29201 Mr. Gary Stewart State Voluntary Cleanup Section S.C. Dept. of Health & Environmental Control 2600 Bull Street Columbia, SC 29201-1708 Ms. Anuradha Nair Gimmi , Manager Nuclear Response and Emergency Environmental Surveillance Division of Emergency Response S.C. Dept. of Health & Environmental Control 2600 Bull Street Columbia , SC 29201-1708 /~DUKE ENERG~ ANNUAL RADIOLO G ICAL ENVIRON ME NTAL OPERA TING R E PORT DUKE ENERGY CORPORATION OCONEE NUCLEAR STATION Unit s 1 , 2, and 3 2017 TABLE OF CONTENTS 1.0 Executive Summar)* 2.0 Introduction 2.1 Site Description and S a mple Loc a t i ons 2.2 Scope and Requiremenc s of the REMP 2.3 Statistical and Calculational Methodology . 2.3.1 Estimation of the Me a n V a lue . 2.3.2 Lower Limit of Detection and Minimum Detect a b l e Activi ty 2.3.3 Trend Identification 3.0 Interpretation of Results . 3.1 Airborne R a dioiodine and P a rticul a te 3.2 Drinkin g Water. 3.3 Surface W a ter . 3.4 Milk. 3.5 Broadleaf Ve g etation 3.6 Fi s h . 3.7 Shoreline Sediment . 3.8' Direct Gamm a. Radiation 3.8.1 Environmental TLD. 3.8.2 ISFSI 3.9 Land se Censu s 4.0 Evaluation of Dose . 4.1 Dose from Environm e nt a l M eas urements 4.2 Estimated Do s e from Releases 4.3 Compari s on of Dose s 5.0 Quality Assurance 5.1 Sample Collection 5.2 Sample Analysis 5.3 Dosimetry Analysis 5.4 Laboratory Equipment Quality Assurance 5.4.1 Daily Quality Control 5.4.2 Calibration Verification . 5.4.3 Batch Processing 5.5 Duke Energy Interlaboratory Comparison Program 5.5.1 Duke Energy Interlaboratory Pro g ram 5.5.2 Eckert & Ziegler Analytics Cross Check Program 5.5.3 ERA Proficiency Testing . . 6 Intercomparison Pro g ram . 5.7 TLD lntercomparison Program . 5. 7. I Nuclear Technology Services lntercomparison Program 5.7.2 Internal Cross Check (Duke Ene rg y). Appendices Appendix A: Environmental Sampling & Analysis Procedures .

I. Change of Sampling Procedures. II. Description of Analysis Procedures III. Change of Analysis Procedures . IV. Sampling and Analysis Procedures 1-1 2-1 2-1 2-1 2-2 2-2 2-3. 2-3 3-1 3-2 3-5 3-8 3-10 3-12 3-14 3-17 3-19 3-19 3-20 3-24 4-1 4-1 4-1 4-2 5-1 5-1 5-1 5-1 5-1 5-1 5-1 5-1 5-1 5-2 5-2 5-3 5-3 5-3 5-3 5-4 A-I A-2 A-2 A-3 A-3 A. I Airborne Particulate and Radioiodin e A-3 A.2 Drinking Water A-3 A.3 Surface Water. A-4 A.4 Milk A-4 A.5 Broadleaf Vegetation A*4 A.6 Fish A-4 A.7 Shoreline Sediment . A-4 A.8 Direct Gamma Radiation (TLD) A*5 A.9 Annual Land Use Census . A-5 V. Global Positioning System (GPS) Analysis. A 5 Appendix B: Radiological Environmental Monitoring Program* Summary of Results. B* 1 Air Particulate . B-2 Air Radioiodine. B-2 Drinking Water. B-2 Surface Water . B-2 Milk. B-2 Broadleaf Vegetation B-3 Fish . B-3 Shoreline Sediment . B-3 Direct Gamma Radiation (TLD) B 3 Appendix C: Sampling Deviations

& Unavailable Analyses C-1 C. l Sampling Deviations . C-2 C.2 Una'!ailable Analyses. C-) Appendix D: Analytical Deviations . D-*1 Appendix E: Radiological Environmental Monitoring Pro g ram Results E-1 Appendix F: Errata to Previous Reports F* 1 LIST OF FIGURES 2.1-1 2.1-2 3.1 3.2-l 3.2-2 3.3 3.5 3.6-l 3.6-2 3.7 3.8 3.9 Oconee Nuclear Station Sampling Location s Map (One Mi l e Radius) .. Oconee Nuclear Station Sampling Location s Map (Ten Mile Radius) Concentration of Gross Beta in Air Particulate . Concentration of Gross Beta in Drinking Water . Concentration of Tritium in Drinking Water Concentration of Tritium in Surface Water. Concentration of Cs-137 in Broad leaf Vegetation Concentration of Cs-137 in Fish Concentration of Cs-134 in Fish Concentration of Cs-137 in Shoreline Sediment : Direct Gamma Radiation (TLD) Results Oconee Nuclear Station 2017 Land Use Censu s Map LIST OF TABLES 2.1-A 2.1-B 2.2-A 2.2-B 2.2-C 3.1-A 3.1-B 3.2 3.3 3.4 3.5 Oconee Radiological Monitoring Program Sampling Locations Oconee Radiological Monitoring Program Sampling Location s (TLD Sites) Reporting Levels for Radioactivity Concentrations in Environmental Samples REMP Analysis Frequency Maximum Values for the A PRIORI Lower Limits of Detection Mean Concentration of Air Radioiodine (1-131) . Mean Concentration of Gross Beta in Air Particulate . Mean ~oncentrations of Radionuclides in Drinking Water Mean Concentrations of Radionuclides in Surface Water Mean Concentration of Radionuclides in Milk . Mean Concentration of Radionuclides in Vegetation ii 2-4 2-5 3-4 3-6 3-6 3-8 3-12 3-15 3-15 3-17 3-20 3-25 2-6 2-7 2-8 2-8 2-9 3-3 3-4 3-7 3-9 3-11 3-13 3.6 3.7 3.8-A 3.8-B 3.9 4.1-A 4.1-B 5.0-A 5.0-B Mean Concentrations of Radionuclides in Fish . Mean Concentrations of Radionuclides in Shoreline Sediment Direct Gamma Radiation (TLD) Results Direct Gamma Radiation (TLD) Oconee 2017 Investigation Level Ocon ee 2017 Land Use Census Results Oconee Nuclear Station 2017 Environmental and Effluent Dose Comparison Ma ximum Individual Dose for 2017 based on Environmental Measurements (rnrem) for Oconee Nuclear Station Eckert & Ziegler Analytics Cross Check Program 2017 Environmental Dosimeter Cross-Check Results LIST OF ACRONYMS USED IN THIS TEXT (i11 alpha/Je1irnl order) AREOR Annual Radiolol!ical Environmenrnl Opera1inl! Repor t ARERR Annual Radiologi cal Efnuenl Rel ease Report BW BiWeekly C Control CR Condi1ion Report (analOl!OUS 10 Nucl earCo ndi1ion R eport (NCR)) ERA En viron mental Re source Associates EZA Eckert & Ziei:lcr Analytics GEL General Engineering 1 . .aboratorv GI-LU Gastrointesrinal -Lower La r!!e In testine GPS Global Posilioninl! Sy stem I lndicaror IR Inner Rini! ISFSI lndeocndcnt Soenl Fuel Sloragc ln s 1 a lla 1ion LLD Lower Limi1 of De1ec1ion LU Low Level Iodine M Month ly MDA Minimum De1ec1able Activity mrem Millirem MWe MeJ?awatt (electrical) NIST National ln s 1itu1c of Standards and Tcchnoloi:y NCR Nuclea r Condi1ion Reoon (analogous to Condition R enon (C R)) NRC Nuclear Regulatory Commission ODCM Offsil c Dose Calculation Manual ONS Oconee Nuclear Station OR Ourer Rini: pC i/ks: picocurie oer kilogr am oCi/1 oicocurie oer li1er pCi/m3 picocurie per cubic m e le r 0 Quarterly REMP Rndiolol!ical Environmental Moni1orine Prol!ram SA Semiannually SI Soecial ln1ere s t SLCs Selected Licensee Commitmen1s SM Semimonthly T. Body Total Body TECH SPECs Techn ical Specifications TLD Thermoluminescent Do simete r uC i/ml micr ocurie per milliliter UFSAR Updated Final Safety Analy sis Report w Weekly iii 3-16 3-18 3-21 3-22 3-24 4-3 4-5 5-5 5-8 1.0 EXECUTIV E

SUMMARY

This Annual Radiological Environmental Operating Report describe s the Oconee Nuclear Station Radiological Environmental Monitoring Program (REMP), and the program results for the calendar year 2017. Included arc the identification of sampling locations , descriptions of environmental sampling and analysis procedures, comparisons of present environmental radioactivity levels and preoperational environmental data, comparisons of doses calculated from environmental measurements and effluent data, analysi s of trends in environmental radiological data as potentially affected by station operations, and a summary of environmental radiological sampling results. Quality assurance practices and program changes are also discussed. Sampling activities were conducted as prescribed by Selected Licensee Commitments (SLC's). Required analyses were performed and detection capabilities were met for all collected samples as required by SLC's. One-thousand fifty-three samples were analyzed comprising I, 121 test results in order to compile d<ita for the 2017 report. Based on the annual land use census, the current number of sampling sites for Oconee Nuclear Station is sufficient. Concentrations observed in the environment in 2017 for station related radionuclides were within the ranges of concentrations observed in the past. Inspection of data showed that radioactivity concentration in drinking water, surface water, fish, shoreline s ediment , and broadleaf vegetation are hi g her than the activities reported for samples collected at control locations. All po itively identified measurements attributable to station operation were within limits as specified in SLC's. Additionally, environmental radiological monitoring data is consistent with effluents introduced into the env ironment by plant operations. The total body dose e timated to the maximum exposed member of the public as calculated by environmental ampling data , excluding TLD results, was 2.49E-01 mrem for 2017. Background radiation dose in the United State is approximately 620 mrem per year (approximately half from naturally occurring sources such as radon and half from man-made sources such as medical processes) .' It is therefore concluded that station operations has had no significant radiological impact on the health and safety of the public or the environment. 'NCRP (2009). Narional Council on Rad ia1100 Protection and Measurements. lo111:i11g Rad iation Exposnre of1he Pop11/atio11 of1he U11i1ed States. NCRP Rcp on No. 160 (Nat,onal Cooncil on Radiation Protection and Mcasurcmenrs, Bethesda. Maryland). Sccrion I

Page I

2.0 INTRODUCTION

2.1 SITE DESCRIPTION AND SAMPLE LOCATIONS Oconee Nuclear Station (ONS) is located in Oconee County , South Carolina, approximately 8 miles northeast of Seneca, South Carolina, on the shore of Lake Keowee. This lake was formed by damming the Keowee and Little Rivers in that location. Immediately to the south is the U.S. Government Hartwell Project. The Keowee Hydroelectric Plant near the station joins Lake Keowee and the upper reaches of Lake Hartwell. To the north, the Jocassee Hydroelectric Plant joins Lake Jocassee and Lake Keowee. Jocassee is a pumped storage plant. ONS consists of three pressurized water reactors. Each unit has an output of 846 megawatts net. Unit I license for operation was issued 2/6/1973. Unit 2 license for operation was issued 10/6/1973. Unit 3 license for operation was issued 7/19/1974. An independent spent fuel storage installation is also located at the site. Figures 2.1-1 and 2.1-2 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 2.1-1 comprises all sample locations within a one mile radius of ONS. Figure 2.1-2 comprises all sample locations within a ten mile radius of ONS. 2.2 SCOPE AND REQUIREM E NTS O F THE REMP An environmental monitoring program h as been in effect at Oconee Nuclear Station since 1969, four years prior to operation of Unit I in I 973. The preoperational program provides data on the existing environmental radioactivity levels for the site and vicinity which may be used to determine whether increa es in environmental levels are attributable to the station. The operational program provide s urveillance and backup support of detailed effluent monitoring which is necessary to evaluate the significance, if any, of the contributions to the exi s ting environmental radioactivity levels that result from station operation. This monitoring program is based on NRC guidance as reflected in the Selected Licen~ee Commitments Manual, with regard to sample media, sampling locations, sampling frequency, and analytical sensitivity requirements. Indicator and control locations were established for comparison purposes to distinguish radioactivity of station origin from natural or other "manmade" environmental radioactivity. The environmental monitoring program also verifies projected and anticipated radionuclide concentrations in the environment and related expo s ures from releases of radionuclide from Oconee Nuclear Station. This program satisfie s. the requirements of Section IV.B.2 of Appendix I to 10CFR50 and IOCFR72.44(d)(2) and provides surveillance of all appropriate critical exposure pathways to man and protects vital intere ts of the company, public, and state and federal agencies concerned with the environment. Reporting levels for radioactivity found in environmental samples are listed in Table 2.2-A. Table 2.2-B lists the REMP analysis and frequency schedu l e. S ec t i on 2 -Page l The Annual Land Use Census, required by Selected Licensee Commitments, is performed to ensure that changes in the use of areas at or beyond the site boundary arc identified and that modifications to the Radiological Environmental Monitoring Program 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 3.9. Participation in an interlaboratory compari s on program as required by Selected Licensee Commitments 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 IOCFR50. A summary of the results obtained as part of this comparison program are in Section 5 of this annual report. 2.3 STATISTICAL AND CALCULATIONAL METHODOLOGY 2.3.1 ESTIMATION OF THE MEAN VALU E 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 s tatistic. This value wa 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: Where: x = estimate of the mean, i = individual sample, X -_,_1_ N N = total number of samples with a net activity (or concentration), X; = net activity (or concentration) for sample i. S ec tion 2 -Page 2 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 Environmental Monitoring Program. LLD -The LLD, as defined in the Selected Licensee Commitments Manual is 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 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" LLD's for each sample medium and selected radionuclides are given in the Selected Licensee Commitments 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 l s 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 station. Visual inspection of tabular or graphical presentation of data (including preoperational) is used to determine if a trend exists. A decrea s e 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 level ; therefore, a knowledge of the release of a radionuclide from the nuclear plant i nece ary to completely interpret the trends, or lack of trends, determined from the environmental data. Some 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 Chernobyl accident or the Fukushima accident). Some of these factors may be obvious while others are sometimes unknown. Therefore, how trends are identified will include some judgment by plant personnel. Secti o n 2

Page 3 Figure 2.1-1 Section 2
Page 4 Oconee Nuclear Station Sampling Locations Map (One Mile Radius) Legend
TLD Locations .a. All Other Locations

/',/ ONS Railroads ONS Roads t=Jstates CJ counties 1111 NHDWaterbody App m x .m ate IO cabOn of features 9~ow., 0 0.25 0.5 ----==== Mites ProJecOon NCSP NA027 Map generated

?01 6 Figure 2.1-2 Se ctio n 2

Pa g e 5 Oconee Nuclear Station Sampling Locations Map (Ten Mile Radius) Legend
TLD Locations
All Other Locations
/',/ ONS Railroads NavteqHwys c:::i States CJ counties -NHOWaterbody Incorporated Areas Appro 10m a t e ocation ot fea t ures s riown 0 2 3 *--==-~=:i i Miles Pr o: ec i ion NCSP NA027 Mali generated 2016 w BW M C Site # 060 060 062 063 06 3.1 064 066 067 068 071 077 078.1 079 081 084 085 091 TABLE 2.1-A OCONEE RADIOLOGICAL MONITORING PROGRAM SAMPLING LOCATIONS Table 2.1-A Codes W e ekly SM Semimonthly BiWeckly Q Qu a rterly Monthly SA Semiannually Control I Indicator Measure Location Description
Air Rad. & Surf aC'r Drinklnx ShortNn t Type Par1 fr ula(e \\atr r \\'attt Sodlmtn< I Greenville Water Int ake Road (3.23 NE) M c"" Greenville Water Int a ke Road (2.28 NE) C Lak e Kcowce Hydro Intake {0.85 mi ENE) M Lake Hartwell Hwy 183 Bridge I (0.80 mi ESE) [000.71 I Lake Hartwell Hwy 183 (0.79 mi E) M C Seneca Municipa l Water Supply(6.67 mi SSW) M [004.11 I Ander s on Municip a l W a ter Supply (18.9 mi M SSE) [012] Lawrence Ramsey Bridge Hwy 27 I {4.34 mi SSE) [005.2] SA C Hil!.h Fall s County Park { 1.8 2 mi W) SA C Clemson Dairy (1 0.2 mi SSE) [006.3) I Skimmer Wall ( 1.00 mi SW) w I Recreation Site (0.53 mi WSW) w I Keowe e Dam (0.56 mi NE) w C Clemson Operation s Center {9.33 mi SE) w I Sue Crai g Road (2.58 mi NNE) w I Lake S e r v i c e s I Bm ld inl! B91 2 5 (0.88 m i NNW) w I Holders Landini!.

Road (2.09 m i le~ S) SA " GPS data reflect approximate accura c y to within 2-5 meters. GPS fi e ld measurem e nts wer e taken a s clo s e a s possible to the item of intere s t. Control for Fish Only [ I Lo ca tion Number~ prio r t o 1984 S ect i on 2 Page 6 Fi s h ~lllk nroadl ta f \'ra.dad o n SA SA SA SM M M M M IR C Sile # 020 021 022 023 024 025 026 027 028 029 030 031 076 032 033 034 035 036 037 038 039 040 04 1 042 043 TABLE 2.1-B OCONEE RADIOLOCICAL MONITORING PROGRAM SAMPLING LOCATIONS (TLD SITES) Table 2.1-B Codes I Inner Ring I OR I Outer Rin g I Control I SI I Special In terest Measure Location* Distance Sector Site Measure Location* Tvpe (miles) # Tvne IR Si 1e B ou n<lary 0.1 6 N 044 OR HWY 130 al linle Riv e r Dam Terminu , of HWY 588 IR Site B oun d ary 0.25 NNE 045 OR a1 Cr ooked Creek HWY 188 01 IR Sile Boundary 0.5 3 NE 046 OR Crooked Creek JR Si1e Bound>r)' 0.93 ENE 047 OR Nev.* Hurc Church , HWY I 88 JR Si1c Boundar)' 0.81 E 0-18 OR JCT HWY J7j & 1 88 IR Site Boundary 0.42 ESE 049 OR JCT HWY 201 & Y 2 Stamp Creek l..lnd,ng. IR ! Sil e B o undary 0.34 SE 050 OR End of IIWY 92 HWY 128. IR Si1c B u undar)' 0.49 SSE 051 OR I mile N OF HWY I JO DPC Branch Oflicc S ue , IR Si1e B ou ndary 0.46 s 052 SI Pi cke n s JR S i t e B o undary 0.56 SSW 053 SI DPC Br.inch 0(1icc Site, L,bcn y JR Sile B o und:1r y 0.42 SW 054 SI P o<t Offi c e -HWY 9) Norris JR Sue Boundar)' 0 , 27 WSW 055 SI Clcin so n Mctc~)rok)g)' Plot JR S11c B oundary 019 w 05 6 SI \Va.1 cr Tower -Sc n~c:a IR SllC B o undary 0.1 9 WNW 057 SI O..: o n cc Mcmor(;J I H osp il:11 IR Snc Bound:iry 0.2 1 WNW 058 C Branch RJ Suh sta ti on. Walhalla tR Si1c Bou ndary 0.22 NW 059 SI Tamas s ec Dar S c h ool Skimm e r wall s h ared wi1h oir IR Sile B oundary 0.17 NNW 077 .. SI m o nit o ring s1a 1io n ONS Recr eatio n Sile s h ored OR M11 4.! Creel,; Landing 4.1 8 N 078.1** SI wilh a ir ml'~nitoring sta ti on OR Keow<-c Church. HWY 3 27 4.85 NNE 081 C Clemson Opera tions Center Con,*cmencc Man. Lake Services Bld g 91 25 shared OR J CT HWY 1 83 & 1'3 4.2 4 NE 085 .. SI v,dlh air m o nil o ring. h.k..-.ilion HWY I JJ. I m i le E.lst Lake Ke owtt Servkc Rd :J[ OR of JCT HWY 1 8.l & 1.1 3 4.02 ENE 086°0 SI 8 001 l..lnding OR Micrm,a,*c TO\\Cr , S1x M i le: 4.74 E 087°0 SI End of Waterfall Rd Doug H o llow Rd I Tran s mi ssion OR J CT HWY 101 & 13l 4.25 ESE os8** SI Tower L a" rcnce Charcl Church. I ntersection OR HWY 13.l 4.93 SE 089" SI H wy 130 & Kc owcc Ri\'Cr Rd HWY 291 a l Crcs ('cnt Rcsoon:c s, Kcowcc OR l s.nq ueena Pork 4.09 SSE 090** SI R iver Rd :it 8e3vcr Da m

GPS do10 rcncc1 accuracy 10 w11h1n 2 5 me1crs GPS lield mcn surcmcn t s were taken ns c lo se a s possthle 10 1hc ,1em of ,n1 ere,1. ** TLD t ocn1ion nddc d 1 0 Oconee REMP. ODCM R ev1s,on 58 (NCR# 02035669). Sec tion 2 Pa ge 7 Distance Sector (miles) 3.96 s 4.78 SSW 4.61 SW 3.58 WSW 3.64 w 3.60 WNW 3.53 NW 4.64 NNW 1 2.4 ENE 1 1.7 E 8 60 ESE 9.27 SSE 7.3 0 SSW 8.42 SW 9.39 WSW 9.2 0 NW 1.00 SW 0.53 WSW 9.33 SE 0.88 NNW 0.83 NW 1.33 WNW 1.00 SSW 1.19 s 0.79 SE TABLE 2.2-A REPORTING LEVELS FOR RADIOACTIVITY CONCENTRATIONS IN ENVIRONMENTAL SAMPLES Analysis Water Air Particulates Fish (pCi/liter) or Gases (pCi/kg-wet) (oCi/m 3) H-3 20.000 101 ------Mn-54 1,000 ---30,000 Fe-59 400 ---1.0.000 Co-58 1.000 ---30, 000 Co-60 300 ---10,000 Zn-65 300 ---20,000 Zr-Nb-95 400 ------1-131 2'") 0.9 ---Cs-134 30 10 t.000 Cs-137 50 20 2,000 Ba-La-140 200 ------(a) For drinking water samp l es only. Th i s is 40CFR P a rt 141 value. (b) If l ow-level 1-13 1 analyses are performed.

TABLE 2.2-B Milk (pCi/liter) ... ---*-... ----3 60 70 300 REMP ANALYSIS FREQUENCY Sample Analy sis Gamma Tritium Low Le ve l Medium Schedule Isotopic 1-131 Air Radi oiodi ne We ek ly X ------Air W eek l y ---------Parti culate Quarterly Composite X ------Direct Radiation Quart e rly ------... Surface Monthly X -----* Water Quarterly Composite ---X **-Drin king Monthl y X ---(a) Water Quarterly Composite ---X ---Shoreline Sediment Semiannually X ------Milk Semimonthly X ---X Fish Semiannually X ---... Broad leaf Vegetation Monthly X ------Gross Beta X ---... ... **-X ---------------Broad leaf Vegetation (pCi/kg-wet) --... ...... -. .. -.. 100 1 , 000 2,000 ---TLD ---------X ------... ... *-----------(a) Low level 1-131 ana ly sis will be performed if abnormal relea ses occu r which could reasonably result in> I pCi/litcr of 1-1 3 1 in drinking water. An LLD of I pCi/liter will be req uired for this ana l ysis. Section 2 -Page 8 TABLE 2.2-C MAXIMUM VALUES FOR THE A PRIORI LOWER LIMITS OF DETECTION Analysis Water Air Fish Mil k B road leaf Sediment (pCi/liter) Pa rticulates (pCi/kg-wet) (pCi/1 iter) Ve getatio n (pCi/kg-dry) or Gases (pCi/kg-wet) (pCi/mJ) Gross Beta 4 0.01 ----** *-* **-H-3 2000 ... --* ... . .. *--Mn-54 15 ---130 ... ------F e-59 30 ... 260 ... *----Co-58, 60 15 ... 130 -----*--Zn-65 30 ... 260 ... ... *-* Zr-95 15 -------** *--*--Nb-95 15 -------** ... . .. 1-131 15'"' 0.07 ---I 60 Cs-134 1 5 0.05 130 15 60 150 Cs-137 18 0.06 150 18 80 180 Ba-La-140 15 ---... 15 -----(a) LLD for low-level 1-131 ana ly s es is I pCi/liter if performed ScCllon 2

Pa ge 9 3.0 INTERPRET ATION OF RESULTS Review of 2017 REMP analysis results was performed to identify changes in environmental levels as a result of station operations. The review is summarized in this section. Data from 2017 was compared to preoperational and historical data. Sample data for some media is not directly comparable to preoperational and earlier operational s ample results because of either significant changes in the analysis methods or changes in the reporting of the results. Summary tables containing 2017 information required by Technical Specification Administrative Control 5.6.2 are located in Appendix B. REMP results for 2017 are located in Appendix E. Evaluation for significant trends was performed for the radionuclides that have required LLDs listed in Selected Licensee Commitment 16.1 l.6. These radionuclides are collectively referred to as "Selected Licensee Commitments radionuclides" and include H-3, Mn-54, Fe-59 , Co-58 , Co-60, Zn-65, Zr-95 , Nb-95, 1-131, Cs-134 , Cs-137, Ba-140, and La-140. Drinking water gro ss beta results are routinely trended. Trending of air particulate gross beta results was initiated in 1996 when the analysis was resumed. Trending is also performed for other radionuclides that are detected and could have been the result of station effluents. Only Selected Licensee Commitment radionuclides were detected in 2011. Trending was performed by comparing annual mean concentrations of any effluent related detected radionuclide to historical results. Factors evaluated include the frequency of detection and the concentration in terms of the percent of the radionuclide's SLC reporting level (Table 2.2-A). All maximum percent of reporting level values were well below the I 00% action level. The highest value reached during 2017 due to ONS operation was 2.1 % for H-3 in a drinking water sample collected at location 066. Changes in sample location , analytical technique, and presentation of results must be consider e d when reviewing for trends. Calculation of the annual mean concentrations has been performed differently over the history of the REMP. During 1979-1986 , all net results (sample minus background), positive and negative, were included in the calculation of the mean. Only positive net ac_tivity results were used to calculate the mean for the other. years. A change in gamma spectroscopy analysis systems in 1987 ended a period when many measurements yielded detectable low-level activity for both indicator and control location samples. It is thought that the method the previous system used to estimate net activity may have been vulnerable to positive re su lts. Data presented in Sections 3.1 -3.8 support the conclusion that there were no significant increases in radionuclides in the environment around ONS due to station operations in 2017. Sectio n 3
Pag e I 3.1 AIRBORNE RADIOIODINE AND PARTICULATES In 2017, 318 radioiodine and particulate samples were analyzed, 265 from five indicator locations and 53 from the control location.

Particulate samples were analyzed weekly for gross beta. A quarterly gamma analysis was performed on the quarterly filter composite (by location). An additional gamma analysis was performed on the final 2017 air particulate sample set for calendar reconciliation purposes (NCR # 02174505). Radioiodine samples received a weekly gamma analysis. There was no detectable 1-131 in air samples in 2017. Table 3.1-A gives the highest indicator location annual mean and control location annual mean for l-131 since the preoperational period. The table shows similar historical concentrations for both the indicator and control locations and the activities decreasing from early in the operational history of the plant. No 1-131 activity due to ONS plant operations has been detected since 1994. There were no detectable gamma emitting radionuclides detected in air particulate samples in 2017 due to ONS plant operations. No gamma emitting particulates due to ONS plant operations have been detected in indicator location samples since the change in gamma spectroscopy analysis systems in 1987. Beta analysis of particulate filters was initiated in March of 1996 and became required by Selected Licensee Commitments in 1998. Gross beta analysis was performed on particulate filters during the preoperational and early operational history of the plant but had not been required since 1984. Figure 3.1 summarizes gross beta results for the indicator location with the highest annual mean and the control location samples. Both the indicator and control location results are similar in concentration and are near the lower range of preoperational gross beta results which ranged from 0.04 to 1.46 pCi/m3. K-40 and Be-7 observed in air samples are naturally occurring radionuclides. Section 3

Pa ge 2 Table 3.1-A Mean Concentration of Air Radioiodine (1-131} Year Preopcrational I 969-I 972 Feb. 1973 -Jun e 1973 July 1973 -D ec. 1973 Jan. 197 4 -Jun e 197 4 July 1974 -Dec. 1974 Jan. 1975 -June 1975 July 1975 -Dec. 1975 1976 1977 1978 1979 1980 1981 198 2 1983 1984 1985 1986 1987 (" 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 20 01 2002 2003 2004 2005 2006 2007 2008 2009 2010 20 11 1-* 2012 2013 2014 w 2015 2016 2017 O.OOEO indicates no detectable measurements 1979 -1986 mean based on all net activity (I) 1987-Gnmmu spec tr oscopy s ystem c hang e Indicator Location (pCi/m 3) O.OOEO O.OOEO O.OOEO O.OOEO 2.60E-2 8.65E-2 1. l 3E-2 2.76E-2 3.60E-2 2.19E-1 7.54E-3 3.07E-3 6.31 E-3 2.87E-3 I .48E-3 8.l !E-4 7.7lE-4 5.02E-3 4.29E-3 O.OOEO 4.99E-4 O.OOEO O.OOEO 0.00EO O.OOEO l.03E-2 O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO 0.00EO 0.00EO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO 5.05E-2 O.OOEO O.OOEO 0.00EO O.OOEO O.OOEO O.OOEO (212011 concentra1ion affcc1ed by Fuku shima Daiichi . Control Location (pCi/m 3) O.OOEO O.OOEO O.OOEO O.OOEO 8.00E*3 3.12E-2 9.52E-3 2.18E-2 3.60E-2 l.15E 1 4.75E-4 9.67E-4 5.39E*4 8.!0E-4 3.05E*4 -2.30E-5 4.54E 4 7.86E-3 5.19E*3 O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO 0.00EO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOE.O O.OOEO O.OOEO O.OOEO 0.00EO 4.13E-2 O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO (3) 2014 Gamma spcclroscopy sys tem was replaced IOJUL201-l. Gam ma spec troscop y sys1em hardware. detec1or cooling appara1us.

software. elec1ronics. nuclid e idcntitica1ion libra rie s, and anal)1icul test molrix components for test matnces were modified (NCR# 0739995). No o na l)1ical changes were noted due to the 2014 gamma spectroscopy system change. Section 3 -Page 3 pCl/m 3 4.SOO E*2 4.000E*2 3.SOOE*2 3.000 E-2 2.SOOE-2 2.000 E-2 1.SOO E-2 l.OOOE-2 S.OOOE-3 O.OOOE+O t 1996 1 9 9 8 Figur e 3.1 Concentration of Gross Beta in Air Particulate 2000 200 2 t*-----1 [ 20 0 4 2006 2008 20 10

Indica t o r location ...._C ontro l lo c ation 2 012 Tir e re is 1 10 r e p ort i ng l e l'e l fo r gross b e t a in air pa rri c ul a t e 2014 Table 3.1-B Mean Concentration of Gross Beta in Air Particulate r 2016 Monitorln~

Period Indicator Location (p C l/mJ) C ontrol Location (pCl/mJ) 1996 3.87E-2 3.69E-2 1 997 2.87E-2 2.92E-2 1 998 2.47E-2 l.56E-2 1999 2.85 E-2 2.23E-2 ---------2000 2.38E-2 l.85E-2 ---2001 2.0SE-2 I .94E-2 --------2 002 2.0IE-2 l.84E-2 -2003 l.86E-2 I .82E-2 ------2 004 l.92E-2 l.90E-2 ---2005 l.95E-2 1.91 E-2 --2006 2.09E-2 2.00E-2 -200 7 2.31E-2 2.13E-2 *-2 008 2.08E-2 2.04E-2 i--2009 l.82E-2 l.80E-2 20 1 0 2.02E-2 2.04E-2 201 1 2.06E-2 l.9 2 E-2 -2012 2.63E-2 l.97E-2 --2013 l.96E-2 l.74E-2 2014 2.1 I E-2 l.86E-2 --20 1 5 2.1 3E-2 l.78E-2 20 1 6 2.37E-2 2.1 7E-2 2017 2.5 8E-2 2.28E-2 Sec r ion 3

P age 4 3.2 DRINKING WATER Gross beta analysis and gamma spectroscopy were performed on 42 monthly drinking water samples. These samples were composited to form 12 quarterly composite period samples for Tritium analysis with additional Tritium analyses performed on the final 2017 monthly composites for calendar reconciliation purposes (NCR # 02174946). Two indicator locations and a control location were sampled; however, only one of the indicator locations is downstream of the effluent release point. Table 3.2 lists the highest indicator location annual mean and control location annual mean for gross beta results* since the preoperational period. The indicator location had an average concentration of 1.25 pCi/liter in 2017 , and the control location had a concentration of 1.19 pCi/liter.

For comparison purposes , the 2016 indicator mean was 1.44 pCi/liter. Table 3.2 and Figure 3.2-1 shows the highest indicator and control location annual means for gross beta. The table shows that 2017 gross beta levels in drinking water are lower than preoperational concentrations. Tritium was detected in five of the fifteen composite samples during 2017. The 2017 mean indicator location 066 concentration was 419 pCi/liter, which is 2.1 % of the 20 , 000 pCi/1 Tritium reporting level. Table 3.2 and Figure 3.2-2 show the highest indkator and control location annual means for Tritium since analysi s was initiated early in the operational period. Tritium concentrations have decreased at both the indicator and control locations. The closure of the Clemson water plant in 1989 is one rea s on for the decrease shown in the table and graph. The Clemson site was typically the high mean location when the plant was in operation. There were no gamma emitting radionuclides attributable to plant operations identified in drinking water samples in 2017. Gamma spectroscopy analysi s has not detected any gamma activity in the water supplies since 1988. The dose for consumption of water was less than one mrem per year based on effluent calculations and there were no abnormal releases exceeding I pCi/liter I-131 in 2017; therefore low-level iodine analysis is not required. K-40 and Be-7 observed in drinking water samples are naturally occurring radionuclides. Section 3 Pa ge 5 Figure 3.2-1 pCl/llter Concentration of Gross Beta In Drinking Water 10 ,-.--.,....--..---..---- ..----,------....---....--- ~---.---...... --...... ---.--..... 1976 pCl/llter 5000 4500 4000 + 3500 3000 2000 1500 1000 0 ( 1974 1982 1978 1988 1994 2000 2006

Ind i cator loeitio n -.-Cootrol locat i on Figure 3.2-2 Concentration of Tritium In Drinking Water 1983 19118 1993 1998 2003 2008 2013
Indicator Loaitlon ..... Contro l Loaotlon -20" Rtport l nc Ltvtl C11rre11t reporting level i111pleme11ted 1984 Se c tion 3 -Page 6 Table 3.2 Mean Concentrations of Radionuclides in Drinking Water Gross Beta (pCi/1) Year Indicator Control Location Location Preopcrational ending Jan. I 971 3.03 5.90 Preoperational ending Jan. I 973 3.58 4.94 Feb. 1973 -Jun e 1973 Qualit a tiv e result s reported June 1973 -Dec. 1973 7.15 21.78 Jan. 1974 -Jun e 1974 3.13 6.98 July 1974 -Dec. 1974 2.24 2.02 Jan. 1975 -June 1975 1.98 1.59 July 1975 -Dec. 1975 2.01 1.22 1976 2.38 2.00 1977 2.70 2.30 1 978 2.56 2.17 1979 1.8 3 1.36 1980 1.86 1.63 1981 1.98 1.88 1982 2.04 1.45 19 83 1.85 1.54 1984 1.87 1.08 1985 2.14 1.16 1 986 1.91 I 1.04 1987 2.00 1.20 1988 2.00 1.40 1989 2.30 1.80 1990 3.00 2.70 1991 1.80 1.40 199 2 3.20 1.60 1993 2.10 1.90 1994 1.90 2.10 1995 5.10 2.90 1996 2.07 1.77 1997 2.52 2.23 1998 2.48 1.70 1999 1.73 1.49 2000 2.07 1.68 2001 1.75 1.29 2002 1.61 1.21 2003 1.51 1.05 2004 1.58 1.25 2005 1.28 1.37 2006 1.54 1.75 2007 1.58 1.08 2008 1.82 1.25 2009 1.37 1.19 20 10 1.10 0.97 2011 1.18 1.00 2012 1.40 0.92 2013 1.57 I.I I 2014 1.43 1.12 2015 2.34 1.46 2016 1.44 1.15 2017 1.25 1.19 0.00 indicate s no detectable measurement s 1989 -Clemson water plnnt closes; nearest downstream plant is Anderson. 1979 -1986 mean ba se d on all net activity result s Section 3
Page 7 Tritium (pCi/1) Indicator Control Location Location Analysis not reQuired Analysis not required Analysis not reQuired Analysis not reQuired Analysis not rcauired 525 330 600 300 2990 505 2196 224 1200 290 1050 333 576 235 660 200 830 127 643 153 937 220 765 145 856 210 1240 503 815 680 1570 0.00 1350 559 0.00 0.00 558 0.00 0.00 0.00 0.00 0.00 0.00 0.00 248 0.00 214 0.00 194 0.00 0.00 0.00 185 0.00 251 0.00 390 0.00 338 0.00 266 0.00 225 0.00 377 0.00 340 0.00 40 2 0.00 372 0.00 415 0.00 308 0.00 339 0.00 322 0.00 325 0.00 292 0.00 325 0.00 317 0.00 419 0.00 3.3 SURFACE WATER Gamma spectroscopy was performed on 28 monthly surface water samples. These samples were composited to form eight quarterly composite period samples for Tritium analysis with additional Tritium analyses performed on the final 2017 monthly composites for calendar reconciliation purposes (NCR # 02174946). One indicator and one control location were sampled. The indicator location is near the liquid effluent release point. Tritium was detected in the five indicator location samples. The 2017 average concentration was 5,564 pCi/liter.

The individual samples ranged from 2,580 to I 0,900 pCi/liter. For comparison purposes, t.he 20 I 6 mean concentration was 4,285 pCi/liter. Tritium .was not detected in any control surface water samples. Figure 3.3 shows the indicator and control annual means for Tritium since the preoperational period. Table 3.3 lists the indicator annual means. Gamma spectroscopy analysis did not detect any station related gamma activity during 2017. No gamma emitting radionuclides attributable to station operation have been detected in surface water samples since 1999. Table 3.3 summarizes the indicator annual means of radionuclides detected since the change in the gamma spectroscopy analysis system in 1987. Visual inspection of the gamma spectroscopy tabular data covering the early operational period through 2017 did not reveal any increasing trends. K-40 and Be-7 observed in surface water samples are naturally occurring radionuclides. Figure 3.3 pCl/llter Concentration of Tritium In Surface Water 60000 ---,,.----,,.----, ,.-----, ,-........,---,---.----,.-----,.---.,---,. ---.----,- ---,---,----, 50000 30000 20000 10000 [ -*-k'ld b tor location _._Co n tr ol l o nt ion J There is 110 reporting le v el for Tritium in s urf ace ll'ater S ec t i on 3 -Pag e 8 Table 3.3 Mean Concentrations of Radionuclides in Surface Water Year Co-58 (pC i/1) Preoperationa l 1969 Preoperational 1 970 Preoperationa l 197 I Preooerational 1972 1973 1974 O.OOEO Jan. 1975 -June 1975 O.OOEO July 1975 -Dec. 1975 O.OOEO 1976 l.08E2 1977 2.60EI 1978 2.96E2 1979 l.33EO 1980 l.56EO 1981 l.lOEO 1982 6.14E-I 1983 6.99E-1 1984 9.40E-J 19 8 5 2.15E-1 1986 3.28EO )98Jl'I 5.IOEI 1988 6.20EO 1989 5.30EO 1990 l.70EO 1991 5.40EO 1992 2.50EO 1993 O.OOEO 1994 O.OOEO 1995 O.OOEO 1996 O.OOEO 1997 O.OOEO 1998 O.OOEO 1999 2.73El 2000 O.OOEO 2001 O.OOEO 2002 O.OOEO 2003 O.OOEO 2004 0.00EO 2005 O.OOEO 2006 O.OOEO 2007 O.OOEO 2008 O.OOEO 2009 O.OOEO 2010 O.OOEO 2011 O.OOEO 2012 O.OOEO 2013 O.OOEO 2014 1-> O.OOEO 2015 O.OOEO 2016 O.OOEO 2017 O.OOEO O.OOEO indic a te s no detectable m e asurements 1979-1 9 86 mean ba s ed on a ll nel a c ti,*ily re s ult s Co-60 (pCi/1) Nb-95 (pCi/1) Cs-137 (oCi/1) Qualitati v e results reported Qualitative result s reported Qualitati ve results reported Qualit a tive result s reported Qualitative resu l ts reported I.32El O.OOEO l.60El O.OOEO O.OO E O 0.00EO l.34El O.OOEO O.OOEO 3.30EI O.OOEO 3.50El l.80EI O.OOEO 3.IOEI O.OOEO 0.00EO 2.22EI 2.60EO l.78EO 2.82EO 2.30EO l.22EO 5.40EO 6.IOE-1 l.70EO 3.90EO l.99EO 2.29EO 4.85EO 3.02EO 3.91E-l 6.83£-1 6.30E-I 7.90E-I 4.83E-l 6.27E-1 4.95E-1 9.90£-1 1.23£0 l.14EO 3.07E-1 3.40EO 4.00EO O.OOEO 5.00EO 2.50EO 3.50EO 3.00EO O.OOEO 3.40EO l.60EO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO 0.00EO O.OOEO O.OOEO 0.00EO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO 0.00EO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO 0.00EO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO 0.00EO O.OOEO O.OOEO O.OOEO 0.QOEO O.OOEO O.OOEO (I) 1987 -Gamma spectro s copy s yste111 change . H-3 oCi/1) 4.86E2 5.94E2 4.0IE2 3.62E2 O.OOEO l.99E3 l.56E4 5.5 2 E4 2.95E4 2.90E3 8.00E2 4.37E3 4.93E3 7.21E3 6.13E3 8.40£3 9.90E3 l.05E4 l.26E4 7.08E3 I.IOE4 l.02E4 l.03E4 5.76E3 6.22E3 8.62E3 5.75E3 6.65E3 4.54E3 5.50E3 3.35E3 l.l 3E4 I.48E4 7.43E3 I.OOE4 4.77E3 3.S6E3 5.15E3 6.72E3 9.91E3 9.4 3 E3 4.6 8 E3 l.23E4 4.75E3 5.76E3 3.68E3 3.49E3 7.73E3 4.29E3 5.56E3 (2) 2014 G a mm a spe c troscop y s y s tem wa s re p l a ced I OJUL2014. Gamma s pectr os copy sys tem hardware. de t ector cool i ng app ara tu s. sof1 ware. electronics. nucl i d e identitica1ion librJrie s , and analytical te s 1 matri~ componcnls for 1e s 1 matrices were modified (NCR# 0739995). No analytical c hange s w e re n o ted due co the 2014 gamma s pectr osc opy sys t e m chan ge. Se c tion 3 -Page 9 3.4 MILK Gamma spectroscopy and low level iodine analysis was performed on 26 milk samples collected from the control location in 2017. No indicator dairies were sampled during 2017 and none were identified by the 2017 land use census (NCR# 02132422). The milk animal found at 3.27 miles in the East sector during the 2016 LUC was not incl u ded in the ONS REMP and was no longer present during the 2017 LUC (NCR # 0204509 I). The milk animal found at 4.66 miles in the East sector during the 2016 LUC was still present during the 2017 LUC and appears on Figure 3.9, but the milk is not used for human consumption (NCR # 02132422) and the location is not included in the ONS REMP. There were no gamma emitting radionuclides due to ONS plant operations identified in milk samples in 2017. Cs-137 is the only radionuclide, other than naturally occurring, reported in milk samples since 1988 (excluding Fukushima Daiichi). Cs-137 in milk is not unusual. It is a constituent of nuclear weapons test fallout and nuclear plant accidents and has been observed periodically in samples from indicator and control locations since the preoperational period. Table 3.4 lists the highest indicator location annual mean and control location annual mean for Cs-137 since the pryoperational period. The table shows similar concentratjons for both indicator and control locations. K-40 observed in milk samples is a naturally occurring radionuclide. Section 3 P a ge 10 Table 3.4 Mean Concentration of Radionuclides in Milk Year Preoperational Feb. 1973-June 1973 July 1973-De c.1973 Jan. 1974 June 1974 Ju ly 1974-D~c. 1974 Jan. 1975 Jun e 1975 July 1975 -Dec. 1975 1976 1977 197.8 197 9 19 80 19 8 1 1 982 1 983 1 984 19 85 1 986 1 987'11 19 88 198 9 1 990 19 9 1 199 2 1 993 1 994 1995 1 996 1997 1 998 1999 2000 2001 2002 2003 2004 2oos*-1 2006 2007 2008 2009 2 010 2011 20 1 2 2013 2014'" 2015 2016 2017 O.OOEO indi cates no detectable meas ur eme nt s 1979 -1 986 mean based o n all ne t act i vity result s ( 1 J 1 987 -Gamma s pectroscopy system change Cs-137 Indicator (oCl/l) Cs-137 Control (pCl/l) l.57EI l.46EI Qualitative result s reported Qualitative resu lt s r eported 5.BOEO Qualitative results reported 5.30EO 0.00EO 1.1 1 El O.OOEO l.5 1 EI 9.45EO O.OOEO O.OOEO l.80El 7.47EO 0.00EO O.OOEO l.33E I l.33E I 7.25EO 2.52EO 3.58EO 2.63EO 5.52EO 5.51EO 2.7 1EO 3.25EO 5.04EO -4.27E-1 2.30EO 2.58EO 2.38EO l.31EO 2.92EO 2.97EO 4.90EO 4.90EO 3.90EO 3.20EO 4.70EO 2.90EO 6.40EO O.OOEO 5.00EO O.OOEO 6.60E O O.OOEO O.OOEO O.OOEO O.OOEO l.80EO 2.30EO 2.00EO O.OOEO 4.IOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO No Indicator Location O.OOEO No Indicator Location O.OOEO No Indi cator Location O.OOEO No Ind icator Location O.OOEO No I ndicator Location O.OOEO No Indicator Location O.OOEO No Ind ica t or Location O.OOEO No Indicator Location O.OOEO N o Indicator L ocation O.OOEO No In dica tor Lo cation O.OOEO No Indicator Location O.OOEO No In dicator L ocalion O.OOEO (2) The Oconee milk program was upd ated to align wi th NUREG-130 I durin g 2005 (NCR # 01753418). Location 071 wa s de signated as the new

con1rol site effec tive with the 7/12/2005 sampling.
(3) 20 1 4 Gamma spectrosco p y sys t em was replaced I O JUL 2014. Gamma spec troscopy system h ardware, detector cooling app ara tus , software.

electronics. nuclide identificat ion l ibmries. and analytical t est matrix co mpon e nt s for te s t m a trice s were modi lied (NCR# 0739995). No analytical c h anges were noted due to the 2014 gamma spectr osc opy system change. Section 3 -Page 1 1 3.5 BROADLEAF VEGETATION Gamma spectroscopy wa performed on 48 broadleaf vegetation samples during 2017. Three indicator locations and one control location were sampl e d. Cs-137 was reported in one indicator sample at a concentration of 39.4 pCi/kg ( 1.97% of reporting level). Cs-137 wa s not detected in any of the control samples in 201 7. Cs-137 is the only radionuclide , other than naturally occurring, reported in vegetation sample s since the change in gamma spectroscopy analysis systems in 1987. Figure 3.5 shows the indicator and control annual means for Cs-13 7 since the early operational period of the plant. Table 3.5 shows historical concentrations of Cs-I 37. It is not unusual for Cs-137 to be pr ese nt in vegetation. It is a constituent of nuclear weapons test fallout and nuclear plant accident and has been observed in samples from indicator and control locations since the preoperational period. Table 3.5 lists the highest indicator location annual mean and control location annual mean for Cs-137 since early in the station's operational history. Vi s ual inspection of the tabular data did not reveal any increasing trends. K-40 and Be-7 observed m broadleaf vegetation samples are naturally occurring radionuclides. Figure 3.5 pCf/lqi Concentration of Cs-137 In Broadleaf Vegetation 2500 2000 1500

1000 500 0 a4 ,_.~...-...-i'9-4

.... ota.-..-,,,*** ** 1974 1983 1988 1993 l 9'JB 2003 2CJ0a lOU [ a lnd l utor lout kl n -RtpottlnJ Level 1 2011 concentration affcc red by Fukushim a Da iic hi Se ct ion 3

P ag e 12 Table 3.5 Mean Concentration of Radionuclides in Vegetation Year Cs-137 Indicator (pCi/ke) Cs-137 Control (pCi/k2) July 1974 -Dec. 1974 l.54E3 O.OOEO J an. 1975 -June 1975 l.55E3 l.59E3 July 1975 -Dec. 1975 O.OOEO O.OOEO 1976 O.OOEO O.OOEO 1977 O.OOEO 7.90E2 1978 I. 19E2 8.19EI 1979 5.04EI 2.96El 1980 2.80EI l.55EI 1981 2.99EI 2.60EI 1982 2.42EI 2.62EJ 1983 7.44EO 5.35E-l 1984 L37EI 4.74E2t 1985 l.62EI 2.20E2 1986 3.28EI 3.12E2 1987 1'1 2.70EI 4.20E I 1988 2.40EI 7.50EI 1989 O.OOEO J.08E2 1990 2.73E2 J.74E2 1991 2.20El I .45E2 1992 O.OOEO l.46E2 1993 O.OOEO l.49E2 1994 O.OOEO l.06E2 1995 4.30EI l.58E2 1996 3.79EI l.83E2 1997 4.73El l.35E2 1998 7.28EI l.61E2tt 1999 l.34E2 O.OOEottt 2000 l.06E2 O.OOEO 2001 3.19El O.OOEO 2002 8.44EI 0.00EO 2003 O.OOEO O.OOEO 2004 O.OOEO 5.96EI 2005 4.51EI 4.IIEI 2006 l.77El O.OOEO 2007 O.OOEO O.OOEO 2008 O.OOEO O.OOEO 2009 O.OOEO O.OOEO 2010 O.OOEO 0.00EO 201 1 6.68EI tttt 3.35El tttt 2012 O.OOEO O.OOEO 2013 2.57EI 0.00EO 2014<-* O.OOEO O.OOEO 2015 0.00EO O.OOEO 2016 O.OOEO O.OOEO 2017 3.94EI O.OOEO O.OOEO indicate s no detectable measurements t Control l ocauon changed to 073 1n 1984 Qualitat ive results reported prior to 1974 tt Control l ocation 081 added in 1998 1979-1 986 mean ba se d on all net activity ttt Control location 073 removed in 1999 {I) 1987 -Gamma spec tr oscopy system change tttt 2011 concentration affected by Fukushima Daiich i (2) 20 14 Gamma s pectroscopy system was replaced IOJUL2014. Gamma spec t roscopy sys tem hardware , de1ector cooling apparatus , so rt ware. electronics. nuclide identification l ibraries , and analy1i ca l te st matrix components for t est matrice s were modi lied (NC R# 07 39995 ). No analytical changes were noted due to the 2014 gamma spectroscopy system change. Section 3 -Page 13 3.6 FISH In 2017, gamma spectroscopy was performed on 12 fish samples. Two downstream indicator locations and one control location were sampled. Cs-137 was identified in one of the eight indicator location samples with an average concentration of 17.3 pCi/kg (0.87 % of reporting level). Cs-137 was not detected in any of the control location samples. Figures 3.6-1 and 3.6-2 are graphs displaying the annual means for Cs-137 and Cs-134. Historically, both are contributors to the calculated dose from liquid effluents from ingestion of fish. Radioactivity concentrations in downstream fish samples are higher than those reported in preoperational fish samples, however, concentrations in fish have decreased over time with decreases in radioactive material releases from the plant. One factor affecting the trend analysis is a change in sampling locations. In 1984 , a second downstream fish location was added. Location 063 is closer to the liquid effluent discharge point and has been the highest mean indicator since it was added. Table 3.6 lists the highest indicator location annual means since the preoperational period for radionuclides detected in 2017. Also included in the table are radionuclides that have been identified in this media since the change in analysis systems in 1987. Comparison of data to previous years does not indicate any increases in concentrations.

K-40 observed in fish samples is a naturally occurring radionuclide. Section 3 -Pag e 14 Figure 3.6-1 pCl/1<& Concentration of Cs-137 In Fish 2500 ----.--....---...--~--~--~-~-- ........ --..... ---.--....---..... ---,....-- -,---~-~~ 2000 I 1500

1000 ' 500 1970 1975 1979 1984 1989 1994 1999 2004 2009 2014
lndicat0r Loution Con11o l loc1Uon -Rep0rtinc Ltvel Figure 3.6-2 pCl/"8 Concentration of Cs-134 In Fish 700 600 --' 500 -400 -; -l -' -.J 1 . I ., .J ~{;,~::-. .........

-.. --!' ---------------300 200 100 1970 1975 1979 1984 1989 1994 1999 2004 2009 2014

Indicator lo<11!on _.,_ Control Loac l on Current reporting levels implemented 1984 Se ct i o n 3
Page 15 Table 3.6 Mean Concentrations of Radionuclides in Fish Year Co-58 (pCi/kg) Co-60 (pCi/kg) Cs-134 (pCi/kg) Cs-137 (pCi/kg) Preop ending Jan.1971 O.OOEO O.OOEO O.OOEO J.46E2 Preop ending Jan.1973 O.OOEO O.OOEO O.OOEO l.66E2 Feb. 1973 -June 1973 Qunlitativc results reported-no s ign ificant measurements nbove back11.round Julv 1973 -Dec. 1973 O.OOEO Jan. 1974 -June 1974 O.OOEO July 1974 -Dec. 1974 O.OOEO Jan. 1975 -June l 975 O.OOEO Julv 1975 -Dec. 1975 8.50El 1976 5.70EI 1977 0.00EO 1978 3.27E2 1979 l.91EO 1980 l.45 EI 1981 2.25EI 19 82 9.83E-I 1983 3.35El 1984 1.21 E2 1985 l.6 2E I 1986 9.56EI 1987{') l.63E2 1 988 9.60EI 19 89 4.30El 1990 t.50El 1991 4.59EI 1992 6.lOEI 1993 O.OOEO 19 94 O.OOEO 1995 O.OOEO 1996 O.OOEO 1997 O.OOEO 1998 O.OOEO 1999 O.OOEO 2000 O.OOEO 2001 l.72EI 2002 O.OOEO 2003 5.02El 2004 O.OOEO 2005 0.00EO 2006 O.OOEO 2007 O.OOEO 2008 O.OOEO 2009 9.0lEO 2010 O.OOEO 2011 O.OOEO 2012 l.23E2 2013 O.OOEO 2014 1'1 O.OOEO 2015 O.OOEO 2016 O.OOEO 2017 O.OOEO O.OOEO indicales no de1ec1ablc measurement s 1979 -1986 mean based on all nel activity (I) 1987 -Gamma spcclro sco py syste m change O.OOEO O.OOEO l.89E2 O.OOEO O.OOEO 2.47E l O.OOEO O.OOEO 4.85El O.OOEO 3.8 1El l.05E2 O.OOEO 7.00EI 3.13E2 l.14 E2 7.73EI l.66E2 O.OOEO l.80E2 3.60E2 O.OOEO 3.3 1E 2 O.OOEO t.56EI 9.26EI 3.88E2 l.90EI I.IOE2 3.99E2 l.49El I .40E2 4.51E2 8.03EO l.17E2 2.94E2 4.53EO l.24E2 3.32E2 6.23El 3.87E2 l.04E3 I.JOEi 7.93El 2.85E2 2.59E I 2.57E2 7.36E2 6.30EI 9.80E l 3.93E2 0.00EO 7.20El 2.60E2 l.50EI 8.60EI 3.36E2 O.OOEO 4.80EI l.l9E2 O.OOEO l.25E2 l.94E2 O.OOEO 4.BOEI l.36E2 O.OOEO 2.!0EI J.IOE2 O.OOEO 2.80EI l.05E2 O.OOEO 3.IOEI 9.20E l O.OOEO 4.49EI l.25E2 O.OOEO O.OOEO I. l 8E2 O.OOEO O.OOEO 5.79EI O.OOEO O.OOEO l.04E2 O.OOEO O.OOEO 7.54El 0.00EO O.OOEO 9.92EI 0.00EO O.OOEO 9.37EI 0.00EO O.OOEO 6.04E I O.OOEO O.OOEO 5.29El O.OOEO O.OOEO 5.14EI O.OOEO O.OOEO 5.58El O.OOEO O.OOEO 4.lOEI O.OOEO O.OOEO 3.l3EI 0.00EO O.OOEO 2.68E I O.OOEO O.OOEO 2.69EI O.OOEO O.OOEO 3.53E I 3.61EI O.OOEO 4.32EI O.OOEO O.OOEO 2.44E l 0.00EO O.OOEO l.40EI O.OOEO O.OOEO 1.94EI O.OOEO O.OOEO 2.74El O.OOEO O.OOEO l.73EI (2) 2014 Gamma spectroscopy system was replaced lOJUl.2014. Gamma spcclrosco py sys tem hardware. detL'CIOr coo ling apparatus , s oftw a re , elec troni cs, nuclide id enti'fication libraries. and analytical 1e s 1 mmri x components for tesl matrice s were modified (NCR# 0739995). No ana lyl ica l changes were noted due 10 the 2014 gamma spectrosco py sys lem change. Section 3 -Page 16 3.7 SHORELINE SEDIMENT Gamma spectroscopy was performed on six sediment samples. Two downstream indicator locations and one control location were sampled. Four samples were taken from indicator locations and two from the control location. Indicator location 063 shoreline sediment (Lake Hartwell Hwy 183 Bridge (0.80 mi. ESE)) was replaced with indicator location 091 Shoreline Sediment (Holders Landing Road (2.09 mi. S)) due to indicator location 063 safety and access concerns (NCR# 02053661).

Cs-137 was identified in three of the four indicator location samples. Cs-137 was not identified in the control location samples. The highest 2017 individual sample Cs-137 concentration was 122 pCi/kg. Table 3. 7 lists the highest indicator location annual means since shoreline sediment was initiated in 1984. Included in the table are radionuclides that have been identified in this media since the change in analysis systems in 1987. Visual inspection of the tabular data did not reveal any trends. Figure 3.7 is a graph of the Cs-137 annual means. Historically, Cs-137 is a contributor to the calculated dose from liquid effluents from shoreline sediment. No trends are apparent. t t K-40 and Be-7 observed in shoreline samples are naturally occurring radionuclides. pCl/l<a 1000 -900 soo 700 600 soo 400 300 I 200 I 1984 Figure 3.7 Concentration of Cs-137 In Shoreline Sediment * ... * -~ 1981 1992 1996 2000 2004 2008 2012

lndic~tOf location 063 lndie1tor loca ti on 067 _....., tndi c a1 o r locat io n 09 1 -+-Control lou t i on 068 There are 110 reporting levels for s horeline sediment Scccion 3
P a ge 17 * * ..

Table 3.7 Mean Concentrations of Radionuclides in Shoreline Sediment (pCi/kg) Year Mn-54 Co-58 1 984 I. IOEI l.09EI 1985 9.39EO l.27EO 1986 2.24EI 1.62EI 1987 11 1 5.40E I 4.70E2 1988 3.3 0EI l.20E2 1989 2.30El l.24E2 1990 3.40EI 8.00EI 1991 3.26EI 5.60El 1992 8.79EI l.79E2 1993 8.20EI 8.20EI 1994 5.JOEI 7.00El 1995 I .43E2 3.90EI 1996 O.OOEO 5.IOEI 1997 O.OOEO O.OOEO 1998 O.OOEO O.OOEO 1999 6.96EI O.OOEO 2000 O.OOEO 0.00EO 2001 O.OOEO 2.lOEI 2002 O.OOEO O.OOEO 2003 O.OOEO O.OOEO 2004 8.54EI O.OOEO 2005 2.00E2 O.OOEO 2006 O.OOEO O.OOEO 2007 O.OOEO O.OOEO 2008 O.OOEO O.OOEO 2009 O.OOEO O.OOEO 2010 O.OOEO O.OOEO 2011 O.OOEO O.OOEO 2012 O.OOEO O.OOEO 2013 O.OOEO O.OOEO 2014"' O.OOEO O.OOEO 2015 O.OOEO O.OOEO 2016 O.OOEO O.OOEO 2017 O.OOEO 0.00EO O.OOEO mc.hcatcs no dclcclablc measurement s 1984 -1986 m ea n based on a ll n e t a c t i vity (I) 1 987 G a mma spectro sc opy sy s tem change Co-60 1.19E I 4.79EO 2.50EI 5.07E2 l.87E2 l.96E2 2.59E2 8.57EI l.12E2 6.50EI l.49E2 2.40EI O.OOEO O.OOEO 0.00EO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO 0.00EO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO 0.00EO Zn-65 Cs-134 Cs-137 A2-llOm O.OOEO 7.77EI 5.16EI O.OOEO O.OOEO 7.63EI 9.47EI O.OOEO O.OOEO l.41E2 7.12E 2 O.OOEO O.OOEO 1.0lE2 6.22E2 3.46E 2 6.70EI 6.60EI 7.59E2 l.62E2 O.OOEO 5.40EI 8.48E2 5.50EI O.OOEO 4.50EI 5.36E2 l.71E2 O.OOEO 6.91EI l.24E2 I.IOE2 O.OOEO 5.60EI 3.31E2 l.69E2 O.OOEO 3.20EI 1.36E 2 5.63EI O.OOEO 6.70EI 2.38E2 l.04E2 0.00EO I.IOEI 5.20EI O.OOEO O.OOEO l.98El 1.19E 2 O.OOEO O.OOEO O.OOEO 1.06E2 O.OOEO O.OOEO O.OOEO I.OIE2 O.OOEO O.OOEO 0.00EO 7.38EI 0.00EO O.OOEO O.OOEO 8.54EI O.OOEO O.OOEO O.OOEO l.20E2 O.OOEO O.OOEO O.OOEO 6.96EI O.OOEO O.OOEO O.OOEO l.93E2 O.OOEO O.OOEO O.OOEO 9.56EI O.OOEO O.OOEO , O.OOEO 6.53EI O.OOEO O.OOEO O.OOEO 5.0IEI O.OOEO O.OOEO 0.00EO 2.97E2 O.OOEO O.OOEO O.OOEO l.78E2 O.OOEO O.OOEO O.OOEO 6.97EI O.OOEO O.OOEO O.OOEO J.15E2 O.OOEO O.OOEO O.OOEO 6.83EI O.OOEO O.OOEO O.OOEO 6.35El O.OOEO O.OOEO O.OOEO 4.37EI O.OOEO O.OOEO O.OOEO 2.1 IEI O.OOEO O.OOEO O.OOEO 2.24El O.OOEO O.OOEO O.OOEO l.36E2 O.OOEO O.OOEO 0.00EO l.2 2E2 0.00EO Sb-125 O.OOEO O.OOEO 0.00EO O.OOEO 3.67E2 l.86E2 9.00El l.78E2 2.08E2 1.11 E2 l.29E2 O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO (2) 2014 Gamma s pectro s c o py s ystem was r e placed IOJUL2014. Gamma spe c tro sc op y syste m hardwa re. det ec t o r c ooling appar a tus. software. electronic

s. nuclide i<lentilicalion librnrie s. *and analyt i cal lesl matri., component s for te s t matn c e s w e re modi lied (NCR # 07 39995). N o analyt ica l c hanges were n o ted du e t o lh e 2014 g a m m a s pectr osc opy sys tem d1ang e. Section 3

Page 18 3.8 DIRECT GAMMA RADIATION 3.8.1 ENVIRONMENT AL TLD Oconee is licensed with an exclusion area boundary defined by UFSAR Section 2.1.1.2 as a l mile radius from station center. This is the same boundary established for determining radioactive effluent release limits. No permanent public access is permitted within the exclusion area. TLD locations designated as "inner ring" were placed within exclusion area upon inception of the REMP and all are used as indicators.

Due to close proximity with Oconee, inner ring TLD locations are not good indicators of radiation exposure to a member of the public, but are good at determining nearby environmental effects due to plant operation. Based on their placement, inner ring TLD locations are expected to occasionally be influenced by normal plant operation. TLD locations designated as "outer ring" are outside the 1 mile exclusion area but within a 5 mile radius of station center. All outer ring TLD locations are used as indicators. A subset of TLD locations within a 7 to 13 mile radius from station center are designated as "special interest." The two "control" locations are greater than 9 miles from station center. These locations were chosen to reduce the probability of influence from Oconee 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. In 2017, 200 total TLDs were analyzed, 192 at indicator locations and 8 at control locations. TLDs are collected and analyzed quarterly. Transit and laboratory background dose is determined and subtracted from gross field readings as required by ANSI N545-I 975. Based on Appendix B TLD data, the highest annual total dose was 111 mrem at indicator location 024, 0.81 miles E of station center. Figure 3.8 and Table 3.8-A show TLD inner ring, outer ring, and control location annual averages in mrem per year. Data is provided from 1984 when TLD locations were added and arranged in an inner ring and outer ring configuration. Preoperational data is also provided in the table. As shown in the graph, historical inner and outer ring averages compare similarly, while control data is somewhat higher. This is most likely an artifact of the underlying geologic structures at the c~ntrol locations. Comparing data from the 2017 Oconee Annual Radiological Effluent Release Report (ARERR), dose to a member of the public resulting from gaseous effluent releases at Oconee is a small fraction of measured TLD dose. Therefore, it can be concluded that gaseous effluents from Oconee had negligible impact on measured TLD values. Starting in 2014, enhanced analytical methods were implemented. Quarterly and annual baseline dose was determined using appropriate statistical methods considering data from 2000 through 2012. Quarterly and annual dose for 2017 was compared to baseline values to determine if an Investigation Level had been exceeded for evaluation of potential dose to a member of the public. No TLD location exceeded the Quarterly or Annual Investigation Level in 2017, therefore no evaluation of dose to a member of the public from direct or scattered radiation was performed. Table 3.8-B summarizes the data. SeCll o n 3 Pag e 19 A TLD intercomparison program is conducted as part of the quality assurance program. Results of this program are included in section 5.7. 3.8.2 ISFSI The Oconee ISFSJ began operation in 1990. It is located 0.25 miles southwest of station center in a secured area specifically constructed to provide dry storage for spent nuclear fuel. The ISFSI employs the NUHOMS horizontal storage module design. Irradiated fuel assemblies are confined, protected , and shielded by a reinforced concrete module. The system is completely passive and designed to provide shielding and safe confinement of spent fuel for a range of postulated accident conditions and natural phenomena. Decay heat is removed from the module by a passive ventilation system. No radiological liquid or gaseous effluents are expected from the passive storage provided by the ISFSI. Therefore any dose to offsite locations would be from direct and scattered gamma radiation. The Oconee REMP serves as the operational program for the ISFSI. Several environmental TLD locations are presently located at the Oconee site boundary fence near the ISFSI. The closest of these is 0.3 miles from the ISFSI, well within the I mile exclusion boundarr In addition, dose rates at the ISFSI restricted area fence are monitored with TLDs as part of the routine REMP. These are used, in part, to control occupational exposure and augment the REMP according to the Oconee ISFSI UFSAR. The maximum TLD dose at the ISFSI fence , which is not accessible to the public, was 587 mrem per standard quarter. This is consistent with previous measurements. Figure 3.8 mrem/year Direct Gamma Radiation (TLD) Results 250 --~~-~-~----~~-~ ~~~-~' 200 150 so 0 1984 1988 1992 1996 2000 2004 2008 JOU l-0 16 L ___ ...._ __ 1on_e,_R_l ns ____ ----__ 0u_te_r R_i na _____ -+-_C_on_trol_ --J There is 110 reporting le1 1 el for Direct Radiation (TLD) Secf,on 3 Page 20 Table 3.8-A Direct Gamma Radiation (TLD) ResultsCIJ Inner Ring Average Outer Ring Average Control Average Year (mrem/vr) (mrem/yr) (mrem/yr) Preooerational l.07E2 1.18E2 l.42E2 1984 7.54EI 7.96EI l.05E2 1985 I.I IE2 l.15E2 I .49E2 1986 9.90EI I.OIE2 l.43E2 1987 8.0IEI 8.44EI 9.91EI 1988 6.87EI 7.47EI 1.07E2 1989 6.0SEI 5.86EI 8.49EI 1990 4.96EI 4.82EI 6.66EI 1991 5.BIEI 6.IBEI 8.36EI 1992 7.24EI 6.95El 8.74EI 1993 7.1 IEI 7.66EI 8.84EI 1994 8.25EI 9.00EI l.06E2 1995 8.89EI 9.66EI l.25E2 1996 6.51EI 7.44EI 9.60EI 1997 6.92EI 7.96EI 9.93EI 1998 6.81EI 7.68EI I.I 2E2 1999 7.0BEI 7.84EI 9.88EI 2000 7.24EI 8.03EI I.OOE2 2001 6.99EI 7.83EI 9.71EI 2002 , 7.28EI 8.1 IEI l.03E2 2003 7.36EI 8.23EI l.03E2 2004 7.61EI 8.31EI l.05E2 2005 7.54EI 8.46EI 9.95EI 2006 7.79EI 8.57EI t.04E2 2007 7.70EI 8.55EI l.03E2 2008 8.04EI 9.03EI l.05E2 2 009 8.08EI 8.98EI l.06E2 2010 7.94EI 8.85EI 9.77EI 2011 7.96EI 8.91EI l.05E2 2012 7.89EI 8.79EI l.05E2 2013 7.83EI 8.84EI l.06E2 2014 7.58EI 8.46EI l.05E2 2015 7.48EI 8.67EI l.04E2 2016 7.59EI 8.65EI J.06E2 2017 7.18EI 8.17EI I.OIE2 (I) iOl4 AREOR. tabula r r es ult s con\'erted rro m mR/yr to mrem/yr (n" 0.95) Section 3

Page 21 Table 3.8-B Direct Gamma Radiation (TLD) Oconee 2017 Investigation Level Oconee 2017 MDD,lf 7 Oconee 2017 MDDA: 11 Quarterly (mrem) I Annual(mrem)

Location Bo M 0 Ql MoQ2 M 0 Q3 M 0 Q4 LoQl L 0 Q2 L 0 Q3 LoQ4 BA 20 18.9 20.6 17.4 12.7 18.0 ND ND ND ND 75.7 21 14.0 16.2 12.7 8.6 13.5 ND ND ND ND 56.9 22 21.8 24.9 21.1 17.2 22.2 ND ND ND ND 89.7 23 21.9 25.3 19.3 15.6 20.9 ND ND ND ND 87.8 24 22.8 32.9 25.6 23.7 28.6 IO.I ND ND ND 98.6 25 17.1 20.7 16.3 l 1.7 18.4 ND ND ND ND* 72.9 26 16.5 19.0 15.8 I 1.7 17.I ND ND ND ND 67.2 27 19.2 21.2 17.6 12.7 18.4 ND ND ND ND 78.1 28 17.0 17.9 14.3 10.6 16.3 ND ND ND ND 68.3 29 15.7 17.4 13.6 10.0 15.2 ND ND ND ND 63.3 30 17.0 1 9.4 17.l 12.9 19.7 ND ND ND ND 70.6 31 16.4 17.8 15.1 11.5 16.0 ND ND ND ND 65.7 32 22.9 21.9 17.8 13.8 17.1 ND ND ND ND 94.5 33 19.5 19.7 15.4 11.4 16.3 ND ND ND ND 77.9 34 21.5 19.3 15.9 1 2.6 16.6 ND ND ND ND 86.0 35 22.9 26.3 21.7 16.5 21.5 ND ND ND ND 93.3 36 26.5 29.3 22.3 20.7 26.2 ND ND ND ND 105.1 37 20.4 23.6 20.2 12.3 17.5 ND ND ND ND 82.0 38 21.9 24.9 20.7 16.2 21.8 ND ND ND ND 87.5 39 24.2 27.5 22.7 17.1 22.3 ND ND ND ND 96.2 40 23.7 29.7 23.9 19.5 24.2 ND ND ND ND IOI.I 41 17.3 1 9.4 16.0 11.6 17.8 ND ND ND ND 69.1 42 25.0 27.1 25.5 18.9 24.1 ND ND ND ND 102.2 43 23.8 26.0 22.2 18.3 23.6 ND ND ND ND 95.3 44 18.3 19.9 18.0 13.8 18.7 ND ND ND ND 80.0 45 17.0 18.6 14.9 11.3 17.8 ND ND ND ND 67.9 46 21.5 25.2 21.4 17.1 21.9 ND ND ND ND 91.8 47 22.4 25.2 20.8 17.1 22.9 ND ND ND ND 91.1 48 25.3 27.3 23.9 18.4 24.8 ND ND ND ND 101.3 50 17.7 20.9 15.7 12.1 17.3 ND ND ND ND 70.9 51 19.0 21.5 17.5 12.1 17.7 ND ND ND ND 76.2 52 22.9 27.6 21.6 18.2 21.9 ND ND ND ND 94.8 53 25.1 28.6 21.9 16.2 25.1 ND ND ND ND 102.3 54 18.5 20.I 17.1 12.2 18.7 ND ND ND ND 76.5 55 15.5 17.5 14.3 10.4 15.4 ND ND ND ND 65.1 56 22.8 27.5 22.0 !7.4 23.2 ND ND ND ND 91.8 57 22.4 27.7 2 1.9 1 8.9 25.2 ND ND ND ND 93.6 58 29.3 33.0 27.2 22.5 30.2 ND ND ND ND 119.7 59 24.1 26.3 22.2 18.1 24.3 ND ND ND ND 98.5 76 20.8 29.5 22.1 17.3 24.8 8.7 ND ND ND 89.0 ,, .. 17.9 18.0 11.8 ---9.6 ND ND ND ND 69.6 78.)U 24.9 26.7 21.0 12.0 17.9 ND ND ND ND 97.8 81 21.9 24.2 20.2 17.0 26.9 ND ND ND ND 91.1 85"* 18.3 23.0 17.3 14.4 18.3 ND ND ND ND 73.1 86** 15.9 20.0 15.8 11.8 16.0 ND ND ND ND 63.7 87** 16.0 19.2 15.6 11.6 17.7 ND ND ND ND 63.9 88** 19.0 22.2 17.8 15.7 20.3 ND ND ND ND 76.1 89** 20.5 24.2 19.6 16.2 22.0 ND ND ND ND 82.0 90 .. 22.7 26.5 20.9 18.7 24.6 ND ND ND ND 90.7

Ma delermined by n ormalizing available quarterly data to 4 full quarter s ** Tesl Locations added to ODCM for 2017QI (ONS ODCM Revision 58). baseline an a lysi s ongoing (NCR# 02035669) indic a tes no data resulting from mi ss ing TLD. erroneou s TLD reading. or omitted after investigation

!',,,, M. LA 68.7 ND 50.9 ND 85.4 ND 81.0 ND 110.7 12.0 67.2 ND 63.6 ND 69.9 ND 59.2 ND 56.1 ND 69.1 ND 60.3 ND 70.6 ND 62.8 ND 64.4 ND 86.0 ND 98.5 ND 73.5 ND 83.5 ND 89.6 ND 97.4 ND 64.7 ND 95.6 ND 90.2 ND 70.3 ND 62.6 ND 85.6 ND 86.0 ND 94.4 ND 65.9 ND 68.7 ND 89.2 ND 91.9 ND 68.1 ND 57.6 ND 90.1 ND 93.7 ND 112.9 ND 90.9 ND 93.8 ND 52.4 ND 77.5 ND 88.4 ND 73.1 ND 63.6 ND 64.0 ND 76.0 ND 82.0 ND 90.7 ND Note: Data may be omitted after investigation considering the following: (I) Other TLD locations' data from upwind. downwind. and adjacent sectors (2) Review of documentation o n locat ion's characteristics. geograp hy. topo grap hy , etc. (3) Comparison with other radiological data (i.e. gaseous effluent releases, di rect radiation reports. surveys , dose calculations. Area TLDs. etc.). Section 3 -Page 22 T able 3.8-B definition of terms

M DDv = minimum differential dose, quarter l y. 3 times 90"' percentile sv determined from analysis in mrem MDD A = minimum differential dose , annual. J times 90"' percentiles" determined from analysis in mrem B v = Quarterly ba se line (mrem)
Mll = location's 91 day standard quarter normalized dose (mrem per standard quarter) averaged between multiple TLD s at each lo c ation.
Lv = quarterly investigation level dose (mrem)
B" = baseline backgrou n d dose (mrem) (annual)
M" = annual monitoring d a t a -Ma determined by normalizing available quarterly dara to 4 full quarter s
L,. = annual investigation level do se (mrem)
ND = n ot delected Section 3 -Page 23 3.9 LAND USE CENSUS The Land Use Census was conducted during the growing season (5/24 -5/25/201 7) as required by SLC 16.11.6. Table 3.9 summarizes census results. A map indicating identified locations is shown in Figure 3.9. The nearest residence is located in the NNW sector at 1.03 miles. No program changes were required based on the results of the census. Table 3.9 Oconee 2017 Land Use Census Results* Nearest Pathways (Miles) RESIDENCE MJLKANIMAL SECTOR 2016 2017 2016 North 2.98 2.98 ---North-Northeast 1.84 1.84 ---Northeast 1.20 1.20 ---East-Northeast 1.34 1.34 ' ---East 1.64 1.64 3.27 East-Southeast 1.57 1.57 ---Southeast 1.46 1.46 ---South-Southeast 1.54 1.54 --South 1.96 1.96 -** South-Southwest 1.36 1.34'-' --* Southwest 1.27 1.27 ---West-Southwest 1.76 1.76 ---West 1.58 1.58 ---West-Northwest 1.35 1.35 ---Northwest 1.04 1.04 ---North-Northwest 1.03 1.03 ---NOTE: Se c tor and d i stance s were determined b y Glo ba l Po s i t i onin g Sy s t e m
Repre se nt s a change f rom lhe previ o u s ye a r -*-Indicates no occurren c es w i thin the 5 m i le radi u s . 2017 --* ---------4.66*0) ... ------... --* --------* *--------(I) Goal milk used 10 feed g o al k i d s. Milk not u se d for huma n con sump t io n (NCR #0 2 1 32422). S e c tio n 3
P ag e 24 Figure 3.9 Sect i on 3
Page 25 Oconee Nuclear Station 2017 Land Use Census Map Legend
ONS Residence

() ONS Milk Animal * /'v" ONS Railroads /',./ NavteqHwys NavteqStreets t:Jlstates CJeountJes -NHDWaterbody ' M l'k sample locnt>on 1n !ast Sec10r 11 unol>le t o supply eno09h mik to partic,pate ,n the REMP sampl i ng progn,m !lroadleol vegeta!Jon 15 eolltct<d on l<<J ol m 1k =piing .Appro un.Jte l oca t ,on of fe3lutes shown 0 0.5 2 Miles --Proieeuon NCSP NA017 4.1 4.0 EVALUATION OF DOSE DOSE FROM ENVIRONMENTAL MEASUREMENTS Annual doses to maximum exposed individuals were estimated based on measured concentrations of radionuclides in 2017 ONS REMP samples. The primary purpose of estimating doses based on sample results is to allow comparison to effluent program dose estimates. Doses based on sample results were conservatively calculated in a manner as equivalent as possible to effluent-based dose estimates. Doses based on REMP samp le results were calcu lated using the methodology and data presented in NRC Regulatory Guide 1.109. Measured radionuclide concentrations, averaged over the entire year for a specific radionuclide, indicator location, and sample type, were used to calculate REMP-based doses, after subtracting the applicable average background concentration (as measured at the corresponding control location). Regulatory Guide I. I 09 consumption rates for the maximum exposed individual were used in the calculations. A dose factor of zero was assumed when the guide li sted "NO DA TA" as the dose factor for a given radionuclide and organ. Maximum dose estimates calculated using drinking water, fish, and shoreline sediment results are reported in Table 4. I-A. The individual critical population and pathway dose calculations are contained in Table 4.1-B. No radionuclides attributable to ONS operations were detected in milk, airborne radioiodine or airborne particulate samples. Naturally occurring K-40 and Be-7 were detected in some samples but were not included in any REMP-based dose estimates. Dose estimates were not calculated for surface water samples because surface water is not considered a potable drinking water source although surface water tritium concentrations are used in calculating doses from fish. REMP TLD exposure results are discussed in Section 3.8. The maximum environmental organ dose estimate for any single sample type (excluding TLD results) collected during 2017 was 3.35E-1 mrem to the child bone from the consumption of vegetation. 4.2 ESTIMATED DOSE FROM RELEASES Throughout the year, dose estimates were calculated based on actual 2017 liquid and gaseous effluent release data. Effluent-based dose estimates were calculated using OpenEMS which employs methodology and data presented in NRC Regulatory Guide 1.109. These doses are shown in Table 4.1-A along with the corresponding REMP-based dose estimates. Summaries of OpenEMS dose calculations are reported in the Annual Radioactive Effluent Release Report. Sec1ion 4 Page I The effluent-based liquid release doses are summations of the dose contributions of the drinking water, fish, and shoreline pathways. For iodine, particulate, and tritium exposure the effluent-based gaseous release doses are summations of the dose contributors from ground/plane, milk, inhalation and vegetation pathways. 4.3 COMPARISON OF DOSES The liquid environmental and release data doses given in Table 4.1-A agree reasonably well. The similarity of the doses indicate that the radioactivity levels in the environment do not differ significantly from those expected ba s ed on effluent measurements and modeling of the environmental exposure pathways. There are some differences in how effluent and environmental doses are calculated that affect the comparison. Doses calculated from environmental data are conservative because they are based on a mean that includes only sample s with a net positive activity versus a mean that includes all sample results (i.e. zero results are not included in the mean). Also, airborne tritium is not measured in environmental samples but is used to calculate effluent doses. Additionally, in 2010 Oconee began reporting estimated dose from effluent Carbon 14 (C-14). This change came about with the issuing of .Regulatory Guide 1.21 , Revision 2 , Measuring, Evaluating and Reporting Radioactive Material in Liquid and Gaseous Effluents and Solid Waste. A description of this change is found in the 2010 Annual Radiological Effluent Release Report. C-14 is not easily measured in the environment and therefore, environmental and effluent doses from C-14 cannot be compared directly. In calculations based on liquid release effluent pathways , fish, drinking water , and shoreline sediment were the predominant dose pathways based on environmental and effluent samples. The maximum total organ dose based on 2017 environmental sample results was 8.78E-02 mrem to the child liver. The maximum total organ do e of l.43E-l mrem for liquid effluentbased estimates was to the child total body and GI-LLI. The gaseous effluent dose is due to C-14 and tritium in broadleaf vegetation. The maximum total organ dose for gaseous effluent estimates wa 3.49E-I mrem to the child bone, with C-14 being the primary dose contributor. Vegetation was the only gaseous release pathway media that contained detectable activity. The maximum total organ dose for gaseous environmental estimates was 3.35E-I mrem to the child bone. The doses calculated do not exceed 40CFR 190 or 1 OCFR50 dose commitment limits for members of the public. Doses to members of the public attributable to the operation of ONS are being maintained well within regulatory limit s and are described in the Annual Radiological Effluent Release Report (ARERR). Se c tion 4

Pa g e 2 TABLE 4.1-A Page I of 2 OCONEE NUCLEAR STATION 2017 ENVIRONMENTAL AND EFFLUENT DOSE COMPARISON LIQUID RELEASE PATHWAY Environmental Critical Critical Maximum Dose <3> Organ OT Age<*l Pathway (l)
Location Effluent Data (mrem) Skin Environmental Teen Shoreline Sediment 063 (0.80 mi ESE) 3.20E-04 Skin Effluent Teen NIA Discharge Pt. 4.ISE-05 Bone Environmental Child Fish 067 (4.34 mi SSE) 3.90E-02 Bone Effluent Child NIA Discharge Pt. l.66E-04 Liver Environmental Child Fish 067 (4.34 mi SSE) 8.78E-02 Liver Effluent Child NIA 18.9 mi SSE l.42E-OI T. Body Environmental Adult Fish 067 (4.34 mi SSE) 6.91E-02 T.Body Effluent Child NIA 18.9 mi SSE I .43E-01 Thyroid Environmental Child Drinking Water 066 (18.9 mi SSE) 5.04E-02 Thyroid Effluent Child NIA 18.9 mi SSE l.42E-01 Kidney Environmental Child Drinking Water 066 (18.9 mi SSE) 6.26E-02 Kidney Effluent Child NIA 18.9 mi SSE I .42E-01 Lung Environmental Child Drinking Water 066 ( 18.9 mi SSE) 5.48E-02 Lung Effluent Child NIA 18.9 mi SSE l.42E-01 Gl-LLI Environmental Child Drinking Water 066 (18.9 mi SSE) 5.07E-02 GI-LU Effluent Child NIA 18.9 mi SSE l.43E-OI (I) Critical Age is the highe st total do se (all pathway s) to an age group. (2) Critial Pathway is the highest individual dose within the identified Critical Age group. Not available at time of repon compilation. (3) Maximum dose is a summation of the fish, drinking water and shore l ine sediment pathways.

Section 4

Page 3 Page 2 of 2 GASEOUS RELEASE PATHWAY IODINE, PARTICULATE, and TRITIUM Environmental or Critical Critical Maximum Dose <3> Organ Effluent Data Age (I) Pathway <2> Location (mrem) Skin Environmental Skin Effluent Teen NIA I.Omi.NE 4.71E-l I Bone Environmental Child Vegetation 084 (2.58 mi NNE) 3.35E-01 Bone Effluent Child NIA 1.0 mi. SW 3.49E-OI Liver Environmental Child Vegetation 084 (2.58 mi NNE) 3.21E-OI Liver Effluent Child NIA ' 1.0 mi. SW I.OIE-01 T. Body Environmental Adult Vegetation 084 (2.58 mi NNE) I .80E-Ol T. Body Effluent Child NIA 1.0 mi. SW 1.0 I E-01 Thyroid Environmental Thyroid Effluent Child NIA 1.0 mi. SW 1.0IE-01 Kidney Environmental Child Vegetation 084 (2.58 mi NNE) l .04E-Ol Kidney Effluent Child NIA I.Omi. SW l.OIE-01 Lung Environmental Child Vegetation 084 (2.58 mi NNE) 3.76E-02 Lung Effluent Child NIA I.Omi.SW 1.01 E-01 GI-LLI Environmental Adult Vegetation 084 (2.58 mi NNE) 5.32E-03 GI-LLI Effluent Child NIA I.Omi.SW I.OlE-01 ( 1) Critical Age is the highest total dose (all pathways) to an age group. (2) Critial Pathway is the highest individual dose within the identified Critical Age group. Not available at time of report compilation. (3) Maximum dose is a summation of the ground/plane , inhalation , milk and vegetation pathways.

S ec tion 4

Page 4 TABLE4.l-B Maximum Indi vidual Do se for 20 1 7 based o n En viro nm e ntal Measur ements (mrem)for Oc o ne e Nuclear Station Age Sample Medium Bone *uver T.Body Thyroid Kidney Lung GI-LLI Skin Infant Airborne O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Drinking Water O.OOE+OO 4.26E-02 4.26E-02 4.26E-02 4.26E-02 4.26E-02 4.26E-02 O.OOE+OO Milk O.OOE+o O O.OOE+OO O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO TOTAL O.OOE+OO 4.26E-02 4.26E-02 4.2 6E-02 4.26E-02 4.2 6E-02 4.26E-02 O.OOE+OO Child Airborne O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Drinking Water O.OOE+OO 4.34E-02 4.34E-02 4.34E-02 4.34E-02 4.34E-02 4.34E-02 O.OOE+OO Milk O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Broadleaf Vegetation 3.35E-01 3.21E-OI 4.73E-02 O.OOE+OO I.04E-OI 3.76E-02 2.0IE-03 O.OOE+OO Fish 3.90E-02 4.44E-02 I .25E-02 7.0IE-03 1.92E-02 1.14E-02 7.25E-03 O.OOE+OO Shoreline Sediment O.OOE+OO O.OOE+OO 5.74E-05 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 6.70E-05 TOTAL 3.74E-01 4.09E-OI l.03E-Ol 5.04E-02 l.67E-01 9.24E-02 5.27E-02 6.70E-05 Teen Airborne 0.00E+OO O.O OE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Drinking Water O.OOE+OO 2.27E-02 2.2 7E-02 2.27E-02 2.27E-02 2.27E-02 2.27E-02 O.OOE+OO Milk O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Broadleaf Vegetation J.85E-01 2.47E-01 8.59E-02 O.OOE+OO 8.39E-02 3.26E-02 3.5IE-03 O.OOE+OO Fish . 3. JOE-02 4.97E-02 2.29E-02 8.49E-03 2.25E-02 l.39E-02 9.08E-03 O.OOE+OO Shoreline Sediment O.OOE+OO O.OOE+OO 2.75E-04 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO 3.20E-04 TOTAL 2. I6E-OI 3.19E-OI l.32E-Ol 3.12E-02 l.29E-01 6.92E-02 3.53E-02 3.20E-04 Adult Airborne O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Drinking Wat e r O.OOE+OO 3.21 E-02 3.2IE-02 3.2IE-02 3.21 E-02 3.21E-02 3.2IE-02 O.OOE+OO M i lk O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Broadleaf Vegetation 2.0IE-01 2.75E-Ol l.80E-Ol O.OOE+OO 9.33E-02 3.IOE-02 5.32E-03 O.OOE+OO Fish 2.90E-02 5.06E-02 3.70E-02 I. IOE-02 2.45E-02 1.55E-0 2 I .18E-02 0.00E+OO Shoreline Sediment O.OOE+OO O.OOE+OO 4.92E-05 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+oO 5.74E-05 -TOTAL 2.30E-01 3.58E-01 2.49E-Ol 4:3 IE-02 l .SOE-01 7.86E-02 4.92E-02 5.74E-05 Note: Dose tables are provided for sample media d is playing p os itive nuclide occurrence.

Scc11on 4

Page 5 Oconee Nuclear Station Dose from Drinking Water Pathway for 2017 Data Maximum Exposed Infant Infant Dose from Drinking Water Pathwa y (mrem) = Usage (I) x Dose Factor (mrem/pCi ingested) x Concentr-,ltion (pCi/1) U sage (intak* in one year) = 330 I Highest Annual Net Mean Ingestion Dose Factor Concentration Dose (mrem} Indicator Water Radionudide Bone Liver T.Body Th y roid Kidne y Luni: GJ-LLI Location lpCi/1) Bone Livtr T.Body Th y ro i d Kidne y Lun,: GI-LLI Mn-S4 NO DATA l.99E.OS 4.SIE-06 N O DATA 4.41 E.06 NO DATA 7.31&-06 ALL 0.00 O.OOE+-00 O.OOE+OO O.OOE+OO O.OOE+-00 O.OOE+OO O.OOE+OO O.OOE+OO C o-58 NO DATA 3.60 E-06 8.98E-06 NODATA NODATA NODATA 8.97E-06 ALL 0.00 O.OOE+-00 O.OOE+OO O.OO E+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Fe-59 3.08E.OS S.J8E.OS l.12E.OS NODATA NODATA 159E.0S 2.57E.OS AL L 0.00 O.OOE+-00 O.DOE+M O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO c~ NO DATA 1.08E.0S 2.SSE.05 NODATA NODATA NODATA 2.S7E.OS ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+-00 O.OOE+-00 O.OOE+OO O.OOE+OO Zn4i5 1.84E.OS 6.31E.OS 2.91E.OS NO DATA 3.06E.OS NO DATA S.J3E-OS ALL 0.00 O.OOE+-00 O.OOE+OO O.OOE+-00 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Nb-95 4.20E.08 1.73E.08 I.OOE.08 NO DATA l.24E-08 NO DATA l.46E-0S ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+-00 0.08E+OO O.OOE+OO O.OOE+OO Zr-95 2.06E.07 S.02E.f8 3.56E-08 NO DATA 5.41E-08 NO DATA 2.SOE.05 ALL 0.00 O.OOE+-00 O.OOE+Oe 0.00E+OO O.OOE+-00 O.OOE+OO O.OOE+OO O.OOE+OO 1-131 3.59E.OS 4.23E.f5 1.86E.05 1.39E-02 4.94E.05 NO DATA 1.SIE.(16 ALL 0.00 O.OOE+-00 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Cs-134 3.77 E-04 7.t3E-t4 7.IOE.05 NO DATA l.81 E--04 7.4 2E.OS l.91E-06 A LL 0.00 O.OOE+-00 O.OOE+OO O.OOE+OO O.OOE+OO O.OO E+-00 O.OOE+oo O.OOE+-00 Cs-137 S.22 E-04 6.IIE-04 4.JJE-05 NO DATA l.64E-04 6.64E.OS l.91E.(16 ALI , 0.00 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+-00 O.OOE+OO O.OOE+OO O.OOE+OO BaLa-140 1.71 E-04 l.71E.07 8.SIE-06 NO DATA 4.06E.ffl! I.OSE.07 4.20E-OS ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+-00 0.00E+OO 0.00E+OO H-3 NODA TA J.08E.07 3.0SE.07 3.0SE.07 3.0SE.07 3.08E..07 3.08E.07 066 419 0.08E+OO 4.26E.02 4.26E.02 4.26E.02 4.26E-02 4.26E-02 4.26E.02 Dose Commitment (mrtm)
O.OOE+OO 4.26E..02 4.26E.02 4.26E.02 4.26&-02 4.2 6E.02 4.2 6E.02 S,-ct,oo -I
P a ge 6 Oconee Nuclear Station Dose from Drinking Water Pathway for 2017 Data Maximum Exposed Child Child Dose from Drinking Water Pathway (mrem) = Usage (I) x Do s e Factor (mrem/pCi ingested) x Concentration (pCi/1) sage (intake in one year) = 510 I Highest Annual Net Mean Ingestion Dose Factor Concentration Dose {mrem} Indicator Water Radionuclide Bone Liver T. Body Thyroid Kidney Luni: Gl-LLI Location (pCIII> Bone Livt"r T. Body Thyroid Kidney Luni: GI-LLI Mn-54 NO DATA 1.07E-0S 2.85E-06 NO DATA J.OOE-06 NO DATA 8.98E-06 ALL 0.00 O.OOE+tNJ O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.UOE+OO 0.00E+OO Co-S8 NO DATA t.SOE--06 5.5 IE-<Hi NO DATA NO DATA NO DATA LOSE-OS ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+-00 O.OOE+OO O.OOE+OO O.OOE+-00 Fc-59 1.6S E-05 2.67E-OS 1.JJE-05 NO DATA NO DATA 7.74E-06 2.78E-05 ALL 0.00 O.OOE+OO O.OOE+tNJ O.OOE+OO O.OOE+-00 O.OOE+-00 O.Ol>E+tNJ O.OO E+OO CD-60 NO DATA 5.29E-06 I.S6E-OS NO DATA NO DATA NO DATA 2.'JJE-05 ALL 0.00 O.OOE+OO O.Ol)E+-00 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+tNJ Zn~S 1.J7E-OS 3.6SE-OS 2.27E-OS NO DATA 2..JOE-05 NO DATA 6.41E-<Hi ALL 0.00 O.OOE+OO 0.()(>E:+00 O.OOE+OO O.OOE+OO 0.00E+OO U.IN)E+OO O.OOE+OO Nb-95 2.25E-08 8.76E--09 6.26E-09 NO DATA 8.2JE-09 NO DATA 1.62E-115 ALL 0.00 O.(N)E+-00 O.<>OE+-00 O.OOE+OO O.OOE+t>O O.OOE+OO O.OOE+OO 0.00E+OO Zr-9S 1.16E~)7 2.SSE-08 2.27E-08 NO DATA 3.6SE-O!I NO DATA 2.66E-05 ALL 0.00 O.OOE+tNJ U.OOE+OO O.llOE+()O O.OOE+-00 O.OOE+-00 O.OOE+OO 0.00 E+-00 1-131 1.72E-OS l.7JE-05 9.83E-<Hi S.72E-03 2.84E-OS NO DATA l.54E-06 ALL 0.00 O.OOE+t>O O.UOE+-00 O.OOE+t>O O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO c~-134 2.J4E-04 J.84E-04 8.IOE~>S NO DATA 1.19E-04 4.27E-OS 2.07E-<Hi ALL 0.00 O.OOE+-00 O.OOE+OO O.OOE+OO O.OOE+-00 O.OOE+OO O.OOE+-00 U.OOE+OO Cs-137 J.27E-04 J.IJE~)4 4.62E-US NO DATA l.02E-04 3.67E~>S l.96E-06 ALL 0.00 O.<N>E+OO O.OOE+OO O.OOE+-00 O.OOE+OO O.OOE+lNJ O.OOE+OO O.OOE+t>O BaLa-140 8.JIE~IS 7.28E-08 4.85E-06 NO DATA 2.37E-08 4.J4E-O!!

4.21E-OS ALL 0.00 0.00E+tMI O.OOE+OO O.OOE+lMJ O.OOE+OO O.OOE+OO O.OOE+OO O.UOE+OO H 0 J NO DATA 2.0JE-07 2.0JE-07 2.0JE-07 2.0JE-07 2.0JE-07 2.0JE-07 066 419 O.OOE+OO 4.J4E-02 4.34E-02 4.34E-02 4.J4E-02 4.J4E-02 4.J4E-02 Dose Commitmmt (mreml = O.OOE+t>O 4.34E-02 4.34E-02 4.34E-02 4.34E-02 4.34E-02 4.34E-02 Scc110n 4 -Page 7 Oconee Nuclear Station Dose from Broadleaf Vegetation Pathway for 2017 Data Maximum Exposed Child Child Dose from Vegetation Pathway (mrem):: Usage (kg) x Dose Factor (mrem/pCi ingested) x Concentration (pCi/kg) Usage (intake in one y ear):: 26 kg Highest Annual Net Mean Ingestion Dose Factor Concentration Indicator Food Radionuclide Bone Liver T.Body Thyroid Kidney Lun~ GI-LLI Location (pCilkg) Bone Liv~r T. Body 1-IJ_I J.72E-OS l.73E-05 9.S3E-06 S.72£-03 2.84E-0S NO DATA l.54E-06 ALL 0.00 O.OOE+OO O.CIOE+OO O.OOE+OO Cs-134 2.34E-04 J.84E-04 !1.IOE-OS NO DATA 1.19E-04 4.27E-OS 2.07E-06 ALL '0.00 O.CIOE+OO O.OOE+OO O.OOE+OO Cs-137 3.27E-04 J.IJE-04 4.62E-OS NO DATA J.02E-04 J.67E-OS l.96E-06 Oll4 J9.4 3.JSE-01 J.21E-OI 4.7JE-02 Dose Commitment C mrcm)

J.JSE-41 J.21E-OI 4.7JE;02 Sc-c u on -I l'age 8 Dose {mreml Thyroid Kidney Lung Gl-LLI 0.00E+OO O.OOE+oo O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 1.04E-Ot J.76E-02 2.0IE-OJ O.OOE-HIO l.04E-OI J.76E-02 2.0IE-OJ Oconee Nuclear Station Dose from Fish Pathway for 2017 Data Maximum Exposed Child Child Dose from Fish Pathway (mrem) = Us age (kg) x Dose Factor (mrem/pCi ingested) x Concentration (pCi/kg) H-3 Concentration in Fish = Surrace Water pCi/1 x Bioaccumulation Factor 0.9 pCi/kg per pCi/1 = 5564 pCi/1 x 0.9 = 5008 pCi/kg U sage (intakA, in one, y ear) = 6.9 kg Highest Annual Net Mean Ingestion Dose Factor Concentration Indicator Fish --Radionuclide Bone Liver T. Body Thyroid Kidney Lunl( Gl-LLI Locntion (pC~J Bone Livt-r T.Body Mn-54 NO DATA l.07E-0S 2.SSE-06 NO DATA 3.00E-06 NO DATA 8.\ISE--06 ALL 0.00 O.OOE+-00 O.OOE+-00 O.OOE+-00 Co-58 NO DATA I.SOE--06 5.51 E--06 NODAl'A NODATA NODATA I.OSE-0 5 ALL 0.00 O.OOE+OO O.OOE+-00 O.OOE+OO Fr-59 L6SE-05 2.67E.05 l.33E-05 NODATA NODATA 7.74E--06 2-78E-05 ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+OO C0-60 NO DATA S.29E-06 l.56E-05 NODATA NODATA NODATA 2.93E-05 ALL 0.00 O.OOE+OO O.OOE+-00 O.OOE+OO Zn-65 l.37E-OS J.6SE-05 2.27E-OS NO DATA 2.JOE-05 NO DATA 6.41E-06 ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+-00 Cs-134 2.34E-04 3.84E-04 8.IOE-05 NO DATA t.l!IE-04 4.27E-0S 2.07E-06 ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+OO es.in 3.27E-04 3.13E-04 4.62E-05 NO DA T A I.02E-04 J.67E-05 1.96£-06 067 17.3 3.IIOE-02 3.74£-02 S.SIE-03 H-3 NO DATA 2.03E-07 2.03E-07 2.03E-07 2.03£-07 2.03E-07 2.03£-07 063 5008 O.OOE+-00 7.0IE-03 7.0IE-03 Dose Commitment (mr<m)
J.90E.02 4.44E-02 l.2 SE-02 Scct o oo 4 l'ogc 9 Dose {mrem} Thyroid Kidne y Lung Gl-LLI O_OOE+OO O.OOE+OO O.OOE+-00 O.OOE+OO .O;OOE+tO O.OOE+-00 O.OOE+-00 0.00E+OO O.OOE+-00 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+-00 O.OOE+OO O.OOE+OO O.OOE+-00 O.OOE+-00 O.OOE+OO O.OOE+OO O.OCIE+OO O.OOE+Oa O.OOE+OO O.OOE+OO O.OOE+-00 O.OOE+OO l.22E-02 4.38E-03 2.34E-04 7.0IE.03 7.0IE-03 7.0IE-03 7.0IE-03 7.0tE-03 1.,u;-02 1.14£-02 7.25E-03 Oconee Nuclear Station Dosefrom Shoreline Sediment Pathway for 2017 Data Maximum Exposed Child Shoreline Recreation=

S hore Width Factor = Sediment Surface Mas., = 14 0.2 40 hr (in one year) Child Do s e from Shoreline Sediment P11thwa y (mrem) = Shoreline Recreation (hr) " External Dose F11clor (mrem/hr per pCilm') ,r. Shore Width Factor "Sediment Surface Mass (kg/m') x Sediment Concentration (pCi/kg) External Dose Factor Standing on Contaminated Ground (mrem/hr per pCi!m') Radionuclide T. Body Skin Cs-134 1.20E-08 1.40E-08 Cs-137 4.20E-09 4.90E-09 Highest Annual Net Mean Concentration Indicator Sediment Location (pCi/kg) ALL 0.00 091 122 Dose Conunitment (mrcm) "' S L-c tio n 4

P ag e J O (mrem) T. Body Skin O.OOE+-00 O.OOE+-00 S.74E-0S 6.70E-OS 5.74E-05 6.70E-05 Oconee Nuclear Station Dose from Drinking Water Pathway for 2017 Data Maximum Exposed Teen Teen Dose from Drinking Water Pathw 11y (mrem) = Usage (I) x Dose Factor (mrem/pCi ingested) x Concentration (pCi/1) sage (intakAe in one y .. rl = 510 I Highest Annual Net Mean** Ingestion Dose Factor Concentration Dose {mrem} Indicator Water Radionuclide Bono Liver T. Body Thyroid Kidne y Lung Gl*LLI Location l pCill) Bono Liver T. Body Thyroid Kidney Lung Cl-Lt.I Mn-54 NO DATA 5.90E-06 1.17E-06 NO DATA l.76E-06 NO DATA 1.llE-05 ALL o.oo O.OOE+OO 0.00E+OO O.OOE+OO . O.OOE+OO O.OOE+OO O.OOE+OO O.OOE..00 Co-58 NOOATA 9.72E-07 2.lAE-06 NO DATA NODATA NOl>ATA 1.J4E-05 ALL 0.00 O.OOE+OO O.OOE+OO o.OOE+OO O.OOE+OO O.OOE..00 O.OOE+OO O.OOE+OO Ft-59 5.87E-06 l.37E-05 5.29E-06 NO DATA NO DA TA 4.JlE-06 3.24E-OS ALL 11.00 O.OOE..00 O.OOE+OO O.OOE+OO O.OOE+-00 O.OOE+OO o.OOE+OO O.OOE+-00 Co-60 NO DATA 2.81 E-06 6.JJE-06 NO DATA NO DATA NO DATA 3.66E-OS A LL 0.00 O.OOE+-00 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Zn-65 S.76E--06 2.00E-05 9.JJE-06 NO DATA 1.l8E-05 NO DATA 8.47E-06 ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 0.00E+-00 O.OOE+OO O.OOE+OO Nb-95 8.llE-09 4.56E-09 2.SIE,09 NOOATA 4.42£-09 NO DATA 1.95E-OS ALL 0.00 O.OOE+-00 O.OOE+-00 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE..00 Zr-95 4.12E-08 1.JOE--08 8.94E-09 NO DATA 1.91E-08 NO DATA J.OOE-OS A LL 0.00 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 1-131 S.8SE-06 8.19E-06 4.40E.o6 2.J9E-03 J.41E-OS NOOATA 1.62E-06 ALL 0.00 O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO O.OOE..00 O.OOE+OO O.OOE+OO C s-134 8.37E-05 1.97£-04 9.1 4E-OS NO DATA 6.26E-OS 2.39E-05 USE-06 A LL 0.00 O.OO E+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE..00 O.OOE+OO Cs-137 l.12E-04 l.49E-04 S.19E-OS NO DATA S.07E-OS l.97E-OS 2.12E-06 ALL 0.00 O.OOE..00 O.OOE+OO O.OOE+OO O.OOE+OO 0.00E..00 O.OOE+OO O.OOE+OO BaLa-140 2.84E-OS 3.48E-08 1.83E-06 NO DATA I.ISE-08 2.34E-08 4.JSE-05 ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO H-3 NO DATA l.06E-07 l.06E-07 l.06E-07 l.06 E-<r7 1.06E-07 l.06E-07 066 419 O.OOE+-00 2.27E.Ol 2.27E.02 2.27E-Ol 2.27E.02 2.27E.02 2.27E.02 Dose Commilmmt (mrom),< O.OOE+OO 2.27E.02 2.27E.02 2.27E-02 l.27E-02 2.27E-02 2.27E-02 Sc:ctto n-+ Page 11 Oconee Nuclear Station Dose from Broadleaf Vegetation Pathway for 2017 Data Maximum Exposed Teen Teen Dose from Vegetation Pathway (mrem) = Usage (kg) x Dose Factor (mrem/pCi ingested) x Concentration (pCi/kg) Usage (intake in one year) = 42 kg Highest Annual Net Mean Ingestion Dose Factor Concentration Indicator Food Radionudide Bone Liver T.Body Thyroid Kidn ey Lung GI.LLI Location l pCi/iq: J Bone Liver T. Body 1-IJI S.8SE.o6 8.19E.o6 4.40E-06 2.39E-03 1.41E-OS NO DATA 1.62E-06 ALL 0.00 O.OOE+OO O.OOE+OO O.OOE40 Cs-134 8.37E.OS l.97E-04 9.14E.OS NO DATA 6.26E-OS 2.39E.OS 2.4SE-06 ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+OO Cs-137 1.12E-04 l.49E-04 S.19E.0S NO DATA 5.07E-0S 1.97E-OS 2.12E-06 084 39.4 l.85E.Ol 2.47E.OI 8.59E.02 D<><e Commitment (mrem)
t.85E.Ol 2.47E.Ol 8.S9E-02 Section -I* Page 12 Dose {mrem} Thyroid Kidney Lunie; Gl-LLI D.OOE+OO O.OOE+OO O.OOE+OO D.OOE+OO O.OOE+OO O.IIOE+OO D.OOE+OO O.OOE+-00 O.OOE+OO 8.39E-02 3.2 6E.02 3.SIE-03 O.OOE+OO 8.39E-02 3.26E.02 3.SIE-03 Oconee Nuclear Station Dosefrom Fish Pathway for 2017 Data Maximum Exposed Teen Teen Dose from Fish Pathway (mrem) = Usage (kg) " Dose Factor (mrem/pCi ingested) " Concentration (pCi/kg) H-3 Concentration in Fish= Surrace Water pCi/1" Bioaccumulation Factor 0.9 pCi/kg per pCi/1 = 5564 pCi/1 "0.9 = 5008 pCi/kg Usage (in1:1kt in one yea.I = 16 kg Highest Annual Ini:estion Dose Factor Net Mean Concentration Radionudidc Bone Liver T.Bod y Thyroid Kidney Luni: GI-LU Location (pCi/lq:) Bone Liver T. Body Mn-S4 NO DATA S.90E-06 1.17E-06 NO DATA l.76E-06 NO DATA l.?IE--05 ALL 0.00 O.OOE+OO O.OOE+OO O.OIE+OO Co-58 NO DATA 9.72E-07 2.24E-06 NODATA NODATA NODATA l.J4E--05 ALL 0.0 O.OOE+OO O.OOE+OO O.OOE+OO fc-59 5.87E--06 l.37E-0S 5.29E-06 NODATA NODATA 4.32E--06 3.24E--05 ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+OO CIHO NO DATA 2.SIE.-6 6.33E-06 NO DATA NO DATA NO DATA 3.66E-05 ALL 0.00 O.OOE+OO O.OOE-+-00 O.OOE+OO Zrl-65 S.76E--06 2.00E--05 9.33E-06 NO DATA l.28E-05 NO DATA 8.47E-06 ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+-00 Cs*IJ4 8.37E-05 1.97E-04 9.14E--OS NO DATA 6.26E--05 2.39E-05 2.4SE-06 ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+OO Cs-137 I.12E-04 l.49E-04 5.19E-OS NO DATA 5.07E-t5 l.97E--05 2.12E-06 067 17.3 3.IOE-02 4.12E-02 1.44E-02 H-3 NO DATA 1.06E-07 l.06E-07 1.06E--07 l.06E--07 1.06E--07 l.06E--07 063 S008 O.OOE+OO 8.49E-03 8.49E--03 Commitment (mrem) J.IOE-02 4.97E-02 2.29E-02 S c."Cllon .a .. P:1~ 11 Dose (mrem} Th y roid Kidney Lun~ GI-LLI O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO 0.00E+OO -0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 0.001!+00 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO l.40E-02 5.45E-03 5.87£-04 8.4,E-03 8.49E-03 8.49E--03 8.49E-03 8.49£-03 2.2SE--02 1.39E--02 9.0SE-03 Oconee Nuclear Station Dose from Shoreline Sediment Pathway for 2017 Data Maximum Exposed Teen Shoreline Recreation

= Shore Width Factor = Sediment Surface Mass = 67 hr (in one year) 0.2 4-0 ki:/m" Teen Do.,e from Shoreline Sediment Pathway (mrem) = Shoreline Recreation (hr) x External Dose Factor (mrem/hr per pCilm") x Shore Width Factor x Sediment Surface Ma\-s (kglm') x Sediment Concentration (pCi/kg) External Dose Factor Standing on Contaminated Ground (mrcm'hr per pCi/m"J Radionuclide T.Body Skin Cs-134 l.20E-08 1.40E-08 Cs-137 4.20E-09 4.90E-09 High~t Annual Net Mean Concentration Indicator Sediment Location CpCi/kg) ALL 0.00 091 122 Dose Commitment (mrcm) = S ec l ion 4

Page 14 (mrcm) T. Body Skin O.OOE+OO O.OOE+OO 2.75E-04 3.20E-04 2.75E-04 3.20E-04 Oconee Nuclear Station Dose from Drinking Water Pathway for 2017 Data Maximum Exposed Adult Adult Dose rrom Drinking Water Pathway (mrem) = Usage (I) x Dose Factor (mrem/pCi ingested) x Concentration (pCi/1) Usage (inlakr in one yt a r) = 730 I Highest Annual Net Mean Ingestion Dose Factor Concentr.ition Dose (mrem} Indicator Water Radionucli<k Bon* Liver T.Body Th y roid Kidney Lung GI-LLI Location (pCi/ll Bon* Liv,r T. Bod y Thyro i d Kidne y Lung Gl*LLI Mn-54 NO DATA 4.S7E-06 8.72E-07 NO DATA 1.J6E-06 NO DATA 1.40E-0 5 ALL 0.00 O.OOE+OO O.OOE..00 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Co-S8 NO DATA 7.45E-07 l.67E-06 NO DATA NO DATA NO DATA 1.SIE-05 ALL 0.00 O.OOE..00 O.OOE+OO O.OOE..00 O.OOE+OO O.OOE+OO O.OOE..00 O.OOE..00 Fe-59 4.J4E-06 l.02E-OS 3.YIE-06 NO DATA NO DA TA 2.SSE-06 3.40E-05 ALL 0.00 O.OOE..00 O.OOE+OO O.OOE..00 0.00E+OO O.OOE+OO O.OOE+oo O.OOE+OO Co-641 NO DATA 2.14E-06 4.72E.06 NODATA NODATA NODATA 4.0ZE-0 5 ALL 0.00 O.OOE..00 O.OOE+OO O.OOE..00 O.OOE..00 O.OOE+OO O.OOE+oo O.OOE+OO Zn-GS 4.84E-06 1.54E-OS 6.96E-06 NO DAT A l.03E.05 NO DATA 9.70E-06 ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Nb-95 6.22E-09 3.46E-09 1.86E.09 NO DAT A 3.42E-09 NO DATA 2.!0E-05 ALL 0.00 O.OOE+OO O.OOE+OO D.OOE+oo O.OOE+oO O.OOE+oo O.OOE+oo O.OOE+OO Zr-95 3.04E-08 9.75E-09 6.litE-09 NO DATA l.53E-08 NO DATA 3.09E-OS A LL 0.00 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 1-131 4.16E-06 S.9SE-06 3.41E-06 l.9SE-03 1.02E-OS NO DATA l.57E-06 ALL 0.00 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.IIOE+OO O.OOE+OO Cs-134 6.22E-05 l.48E-04 l.21E-04 NO DATA 4.79E-OS l.59E-05 l.59E.06 ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Cs-137 7.97E-0S l.09E-04 7.14E-OS NO DATA 3.70E-OS l.23E-OS 2.l lE-06 ALL 0.00 O.OOE+OO O.OOE+OO t.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO BaLa-1411 2.03E-0S 2.SSE-08 l.33E-06 NO DATA 8.67E-09 l.46E-08 4.ISE-05 ALL 0.00 O.OOE+OO O.OOE+OO 9.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO H-3 NO DATA I.OSE-07 I.OSE-07 I.OSE-07 l.OSE-07 1.05E-07 l.OSE-07 066 419 O.OOE+OO 3.21E-02 3.21E-02 3.21E-0 2 3.21E-02 3.21E-02 3.21E-02 D(t.'ii:l' Commitment (mrem)
O.OOE+OO 3.llE-02 3.21E-02 3.llE-0 2 3.21E-Ol 3.ZIE-02 3.21E-02 Sffi i oo ,!
i':IJ!e I .

Oconee Nuclear Station Dose from Broadleaf Vegetation Pathway for 2017 Data Maximum Exposed Adult Adult Dose from Vegetation (mrem) = Usage (kg) x Dose Factor (mrem/pCi ini:ested) x Concentration (pCi/kg) Usage (intake in one year) = 64 kg Highest Annual Net Mean Ingestion Dose Factor Concentration Indicator Food Radionudide Bone Liver T.Body Thyroid Kidney Lung Gl-LLI Locution (pCiJki:) Bone Liver T. Body 1-131 4.16E-06 5.9SE-06 3.41E-06 l.95E..OJ l.02E-05 NO DATA l.57E..fl6 ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+OO Cs-134 6.22E..0S 1.48E-04 1.21E-04 NO DATA 4.79E..OS I.S9E..OS 2.59E-06 ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+OO c,.131 7.97E..05 l.09E..fl4 7.14E..05 NO DATA J.70E..05 l.23E..OS 2.!IE-06 084 39.4 2.0IE..01 2.7SE..01 l.SOE..01 Dose Commitment (mrcml

2.0IE..01 2.7SE..OI I.SOE..01 S t-ctton 4
Pogc I 6 Dose {mrem} Thyroid Kidney Luni: Gl*LLI O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 9.JJE..02 3.IOE..02 5.32E..03 O.OOE+OO 9.33E..02 3.IOE..02 5.32E..03 Oconee Nuclear Station Dose from Fish Pathway for 2017 Data Maximum Exposed Adult Adult Dose from Fish Pathway (mrem) :: Usage (kg) x Dose Factor (mrem/pCi ingested) x Concentration (pCi/kg) H-3 Concentration in Fish = Surface Water pCi/1 x Bioaccumulation Factor 0.9 pCi/kg per pCi/l-.:: 5564 pCi/1 x 0.9 = 5008 pCi/kg Usage (intake in on* ycur) = 21 kg Highest Annual Net Mean Ingestion Dose Factor Concentr.llion Radionuclidr Bone, Ll*er T. Bod y Thyro i d Kidney Luni: Gl*LLI Lo ca tion (pCi/kj:) B o ne Liver T.Body Mn-54 NO DATA 4.57E-06 8.72E-07 NO DATA l.36E-06 NO DATA l.40E-05 ALL 0.00 O.OOE+OO O.OOE+-00 O.OOE+-00 Co-58 NO DATA 7.4SE-07 l.67E-06 NO DATA NO DATA NO DATA l.SIE-05 ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+OO Fe-59 4.34E-06 l.02E-05 3.91E-06 NO DATA NO DATA 2.85E-06 3.40E-05 ALL 0.00 O.OOE+oO O.OOE+oo O.OOE+-00 Co-641 NO DATA 2.14E-06 4.72E-06 NODATA NODATA NODAT 4.02E-05 A LL 0.00 O.OOE+oo O.OOE+-00 O.OOE+oo 7..n-45 4.84E-06 l.54E-05 6.96E-06 NO DATA t.OJE-05 NO DATA 9.70E-06 ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+-00 Cs-134 6.22E-05 l.48E-04 l.21E-04 NO DATA 4.79E-OS 1.59E-05 2.59E-06 ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+OO C.<-137 7.97E-05 l.09E-04 7.14E-05 NO DATA 3.70E-OS 1.23£-05 2.IIE-06 067 17.3 2.90E-02 3.96E-D2 2.S9E-02 H-3 NO DATA 1.0SE-07 1.0SE-07 l.OSE-07 l.OSE-07 l.OSE-07 t.OSE-07 063 5008 O.OOE+-00 I.IOE-02 1.IOE-02 Dose Commitment (mrcm) 2.90E-02 5.06E-02 3.70E-02 Section -l'a~c 17 Dose (mrem) T hyroid Kidne y Lung Gl-LLI O.OOE+-00 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+-00 0.00E+OO O.OOE+OO 0.00E+OO 0.00E+OO O.OOE+oo O.OOE+-00 O.OOE+OO O.OO E+OO O.OOE+OO O.OOE+-00 O.OOE+OO 0.00E+-00 O.OOE+OO O.OOE+OO O.OOE+-00 O.OOE+OO O.OOE+OO O.OOE+-00 O.OOE+OO O.OOE+OO 1.34E-02 4.47E-03 7.67E-04 I.IOE-02 1.IOE-02 I.IOE-02 l.lOE-02 I.IOE-02 2.4SE-02 1.SSE-02 1.lSE-02 Oconee Nuclear Station Dose from Shoreline Sediment Pathway for 2017 Data Maximum Exposed Adult Shoreline Recrcotion

= Shore Width Factor = Sediment Surfoce Mass = 12 hr (in one year) 0.2 40 kg!m' Adult l>o,;e from Shoreline Sediment Pathway (mttm) = Shoreline Rttreation (hr) x E>.1emal Do s e Factor (mrcm/hr per pCi!m') x Shore Width Factor x Sediment Surface Mas.s (kg/m') x Sediment Concentration (pCi!kg J External Dose Factor Stand i ng on Contaminated Ground (mrem'hr per pCilm') Radionudidc T. Body Skin C s-134 C s-137 l.20E-08 1.40E-08 4.20E-09 4.90E-09 Highest Annual Net Mean Concentration Indicator Location ALL 091 Sediment (pCi/kg) 0.00 122 Dose Commitment (mrcm) = Sect i o n 4 -P ag.: 18 Dose (mrcm) T.Body Skin O.OOE+OO 0.00E+-00 4.92E-OS S.74E-OS 4.9 2 E-OS S.74E-OS 5.0 QUAL I TY ASSURANCE 5.1 SAMPLE COLLECTION EnRad Laboratories and the Environmental Water Resources Group performed the environmental sample collections as specified by approved sample collection procedures. 5.2 SAMPLE ANALYSIS EnRad Laboratories performed the environmental sample analyses as specified by approved analysis procedures. EnRad Laboratories is located in Huntersville, North Carolina, at Duke Energy's Environmental Center. 5.3 DOSIMETRY ANALYSIS The Radiation Dosimetry and Records group performed the environmental dosimetry measurements as specified by approved dosimetry analysis procedures. 5.4 LABO RA TORY E Q UIPMENT Q UALITY ASSURANCE 5.4.1 DAILY Q UALITY 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. 5.4.2 CALIBRATION VERIFICATION National Institute of Standard and Technology (NIST) standards that represent counting geometries are analyzed a unknowns at variou s frequencies ranging from weekly to annually to verify that efficiency calibrations are valid. The frequency is dependent upon in s trument u s e and performance. Investigations are performed and documented s hould calibration verification data fall outside of the acceptable limi ts. 5.4.3 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. 5.5 DUKE ENERGY INTERLABORATORY COMPARISON PROGRAM In 2017 Duke Energy Environmental Laboratory (EnRad) participated in interlaboratory programs to satisfy Radiological Environmental Monitoring Program requirements in Secuon 5 -Pag e I Duke Energy nuclear plant Offsite Dose Calculation Manuals and Selected Licensee Commitments Manuals, as applicable. The EnRad organization , in 2017, elected to voluntarily withdraw its North Carolina State Drinking Water Certification with the North Carolina Department of Health and Human Services, State Laboratory of Public Health. It was determined that there was no longer a business case for maintaining this certification (NCR # 020933 I 9). Samples requiring this certification are sent to General Engineering Laboratories, LLC (GEL), which maintains the necessary certifications to meet regulatory commitments for drinking water. EnRad Laboratory participated in an interlaboratory program with Eckert & Ziegler Analytics (EZA) in 2017. 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. Low-level Iodine-I 31 analysis of drinking water was not required during 2017 since the dose calculated for the consumption of the water was not greater than l mrem per year and there were no abnormal releases exceeding I pCi/liter 1-131 in 2017 in the ONS program. This dose was calculated monthly during 2017 to ensure that low-level Iodine-131 analysis of drinking water samples was not required. 5.5.1 DUKE ENERGY INTERLABORATORY PROGRAM EnRad Laboratories made the determination in 2017 to discontinue its participation in the Duke Energy Fleet Scientific Services (FSS) Interlaboratory Program, as EnRad already maintains a sufficient cross check program through EZA. Historically, Duke Energy FSS has maintained its own Interlaboratory Program ~upporting the Duke Energy Fleet. At EnRad, this has been a supplement to EnRad's participation in the EZA Cross Check Program. In 2017, FSS determined that shifting business needs had reduced the need for the FSS lnterlaboratory Program and the majority of the Interlaboratory Program has been discontinued. 5.5.2 ECKERT & Z I EGLER ANALYTICS CROSS CHECK PROGRAM EnRad Laboratories participated in the Eckert & Ziegler Analytics (EZA) Cross Check Program during 2017. Cross check samples including mixed gamma in liquid, mixed gamma in vegetation, low-level 1-13 I in liquid, mixed gamma air filters (single and composites), mixed gamma and 1-131 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. A summary of the EnRad Laboratory program results for 2017 is documented in Table 5.0-A. Interlaboratory cross check samples from EZA were received and analyzed in all four quarters of 2017. Table 5.0-A lists the performance for specific samples. Eighty-seven nuclide results were reported to EZA of which eighty-six (98.9%) met the acceptance criteria based .on IP 84750. One EZA cross check nuclide result did exhibit a high bias and EnRad proactively initiated an NCR to investigate this bia . Sec1 i on 5 -Page 2 In the second quarter of 2017, a mixed gamma in filter cross check (E 11890) yielded a disagreement on only the Zinc-65 nuclide value (ratio to the known of 130% ). An overall high bias was noted across all other nuclides, primarily in the high energy range. NCR # 02138003 was written to investigate and document the failure. It was determined that the geometry used for gamma filter counting contained compounding biases, leading to consistently high results in the upper energy range. Following the implementation of a new filter geometry, an equivalent filter cross check (E 12011) was analyzed in the fourth quarter of 2017. The cross check passed with reduced biases, and a Zinc-65 nuclide value of 111 % of the known. 5.5.3 ERA PROFICiENCY TESTING EnRad Laboratories made the determination in 2017 to discontinue its participation in the Environmental Resource Associates (ERA) Proficiency Testing program , as this program's participation was solely for the purpose of maintaining EnRad's North Carolina State Drinking Water Certification requirements (NCR# 02093319). 5.6 INTERCOMPARISON PROGRAM Oconee Nuclear Station routinely participates in an environmental sample intercomparison program. Program elements include sampling frequency and analysis parameters for drinking water, surface water, milk, fish, broadleaf vegetation, and shoreline sediment samples that have been collected. Samples are routinely split with a vendor laboratory for intercomparison analysis. 5.7 TLD INTERCOMPARISON PROGRAM 5.7.1 NUCLEAR TECHNOLOGY SERVICES INTERCOMPARISON PROGRAM Radiation Dosimetry and Records participates in a quarterly TLD intercomparison program administered by Nuclear Technology Services, Inc. of R os well, GA. Nuclear Technolo g y Services irradiates environmental dosimeters quarterly and sends them to the Radiation Dosimetry and Records group for analysi of the unknown estimated delivered exposure. A summary of the 2017 Nuclear Technology Service lntercomparison Report is documented in Table 5.0-B. The individual mea s urements were evaluated and results falling outside the acceptable ratio criteria had an evaluation performed to identify any recommended remedial actions and to reduce anomalous erro rs. During first quarter of 2017 an environmental external 0 TLD cross check failed and NCR# 021 47 8 47 was written to document the failure of the four individual TLDs; however, the overall result fell within both the Duke Energy and Nuclear Technology Services, Inc. acceptance criteria. To prevent recurrence, the four TLDs were pulled and visually i nspected for abnormalitie in the elements and overall integrity of the TLDs and no' abnormalities were found. The four TLDs were checked

per procedure and T LDs # 533830 and 103632 were both removed from service. Complete Section 5 P-J ge 3 documentation of any evaluation will be available and provided to the NRC upon request. 5.7.2 INTERNAL CROSS CHECK (DUKE ENERGY) Radiation Do s imetry and Record s participates in a qu a rterly TLD internal comparison program admini s tered internally by the Dosimetry Lab. Th e Dosimetry Lab Staff irradiates environmental do s imeters quarterly and submits them for analysis of the unknown estimated delivered exposure. A summary of the 2017 Internal Cross Check (Duke Energy) Program i s documented in Table 5.0-B. Se c lio n 5 -Pa ge 4 ----i .. '

TABLES.0-A ECKERT & ZIEGLER ANALYTICS CROSSCHECK PROGRAM 2017 Cross Check Results for EnRad Laboratories Interlaboratory cross check samples from EZA were received and analyzed in all four quarters of 2017. 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 5.0-A lists the performance for specific samples. Eighty-seven nuclide results were reported to EZA of which eighty-six (98.9%) met the acceptance criteria based on IP 84750. Sample Sample ID Nuclide Quarter Units EnRad EZA EnRad/EZA Evaluation Value Value Ratio Beta Filter in El 1755 Cs-137 I pCi 247 244 1.01 Agreement Pinochet El 1925A Cs-137 3 pCi 191 199 0.96 Agreement Gamma in El 1924 Ce-141 3 pCi 58.8 60.0 0.98 Agreement Cartridge Co-58 3 pCi 81.0 80.7 1.00 Agreement Co-60 3 pCi 182 181 1.01 Agreement Cr-51 3 pCi 144 150 0.96 Agreement Cs-134 3 pCi 132 138 0.95 Agreement Cs-137 3 pCi 123 119 1.04 Agreement Fe-59 3 pCi 88.3 86.5 1.02 Agreement Mn-54 3 pC1 89.7 84.7 1.06 Agreement Zn-65 3 pCi 141 127 1.11 Agreement LLI-131 El2007 1-13 I 4 pCi/L 58.8 57.7 1.02 Agreement in Water LLI-131 in El 1889 1-131 2 Milk pCi/L 95.4 96.3 0.99 Agreement 1-131 in El 1754 1-131 I pCi 98.t 93.5 1.05 Agreement Charcoal Cartridge El2003 I-131 3 pCi 64.7 64.5 1.00 Agreement Gamma in E12010 Cc-141 4 pCi/g 0.202 0.195 1.04 Agreement Simulated Co-58 Vegetation 4 pCi/g 0.181 0.178 1.02 Agreement (Coffee Co-60 4 pCi/g 0.334 0.342 0.98 Agreement Grounds) Cr-51 4 pC i/g 0.423 0.479 0.88 Agreement Cs-134 4 pCi/g 0.220 0.247 0.89 Agreement Cs-137 4 pCi/g 0.281 0.280 1.00 Agreement Fe-59 4 pCi/g 0.227 0.224 1.01 Agreement Mn-54 4 pCi/g 0.337 0.318 1.06 Agreement Zn-65 4 pCi/g 0.447 0.418 1.07 Agreement Section 5 Page 5 --1 TABLE 5.0-A (Cont.) Sample Sample ID Nuclide Quarter Units EnRa d EZA EnRad/EZA Evaluation Value Value Ratio Gamma in El 1752 Ce-141 I pCi IOI 97.3 1.04 Ag r eeme nt Composite Cr-51 I pCi 202 195 1.04 Agreement Filter C s-1 34 I pCi 90.4 80.5 1.12 Agreeme nt .Cs-137 I pCi 99.8 93.9 1.06 Agreement Co-58 I pCi 106 100 1.06 Agreement Mn-54 I pCi 126 110 1.14 Agreement Fe-59 I pCi IOI 86.4 1.17 Agreement Zn-65 I pCi 164 134 1.22 Agreement Co-60 I pCi 132 123 1.08 Agreement* Gamma in El 17 53 1-131 I pCi/L JOI 97.8 1.03 Agreement Water Ce-141 145 1.03 I pCi/L 149 Agreement I Cr-51 I 282 291 0.97 Agreement pCi/L Cs-134 I pCi/L 117 120 0.97 Agreement Cs* 137 I oCi/L 142 140 1.01 Agreement Co-58 I pCi/L 154 150 1.03 Agreement Mn-54 I pCi/L 174 165 1.06 Agreement Fe-59 I r>Ci/L 139 129 1.08 Agreement Zn-65 I r>Ci/L 226 200 1.1 3 Agreement Co-60 I oCi/L 189 183 1.03 Agreement Gamma in El2006 l-131 3 oCi/L 71.8 79.2 0.91 Agreement Water Ce-141 3 105 99.5 1.06 Agreement pCi/L Cr-51 3 oCi/L 240 248 0.97 Agreement C s-134 3 pCi/L 208 229 0.91 Agreement Cs-137 3 pCi/L 202 196 1.03 Agreement Co-58 3 pCi/L 135 134 I.OJ Agreement Mn-54 3 pCi/L 148 140 1.05 Agreement Fe-59 3 pCi/L 148 143 1.03 Agreement Zn-65 3 nCi/L 238 210 1.1 3 Agreement Co-60 3 pCi/L 294 299 0.98 Agreement Se c tion 5 Page 6 TABLE 5.0-A (Cont.) Sample Sample Nuclide Quarter Units EnRad EZA EnRad/EZA Evaluation ID Value Value Ratio Gamma in EI 1890 Ce-141 2 pCi 119 114 1.04 Agreement Filter Co-58 (Falcon) 2 pCi 124 117 1.06 Agreement Co-60 2 pCi 150 144 1.04 Agreement Cr-51 2 pCi 240 23 8 I.QI Agreement Cs-134 2 pCi 148 142 1.04 Agreement Cs-137 2 pCi 122 113 1.08 Agreement Fe-59 2 pCi 107 87.0 1.23 Agreement Mn-54 2 pCi 146 130 1.13 Agreement Zn-65 2 pCi 200 154 1.30 Non-Agreement' Gamma in El201 I Cc-141 4 pCi 82.5 76.2 1.08 Agreement Filter (Falcon) Co-58 4 pCi 70.8 69.6 1.02 Agreement , Co-60 4 pCi 144 134 1.07 , Agreement Cr-51 4 pCi 202 188 1.08 Agreement Cs-134 4 pCi 97.4 96.7 1.01 Agreement Cs-137 4 pCi 119 110 1.09 Agreement Fe-59 4 pCi 98.5 87.9 1.12 Agreement Mn-54 4 pCi 13 2 125 1.06 Agreement Zn-65 4 pCi 181 164 I.I I Agreement Gamma in El 1756 Milk 1-131 I pCi/L 105 97.9 1.07 Agreement Ce-141 I pCi/L 149 145 1.03 Agreement Cr-51 I pCi/L 331 290 1.14 Agreement Cs-134 I oCi/L 116 120 0.97 Agreement Cs-137 I oCi/L 150 140 1.07 Agreement Co-58 I pCi/L 152 150 1.02 Agreement Mn-54 I pCi/L 177 164 1.08 Agreement Fe-59 I pCi/L 148 129 1.15 Agreement Zn-65 I pCi/L 224 199 1.12 Agreement Co-60 I pCi/L 194 183 1.06 Agreement Gross Beta El 1892 Cs-137 2 pCi/L 255 270 0.94 Agreement in Water E12009 Cs-137 4 pCi/L 250 265 0.94 Agreement Tritium in El 1891 H-3 2 pCi/L 14300 14000 1.02 Agreement Water El2008 H-3 4 pCi/L 13400 0.98 Agreement 13200 I) NCR #02138003 Section 5 Page 7 TABLES.0-B 2017ENVIRONMENTAL DOSIMETER CROSS-CHECK RES UL TS Nuclear Technology Services 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 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 2017 2nd Quarter 2017 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 10 3469 79.16 72.16 9.70 ' <+/-15% Pa~s !03126 20.33 18.90 7.57 <+/-15% Pass 103632 83.94 72.16 16.32 <+/-15% Fai l*" 103068 20.20 18.90 6.88 <+/-15% Pas s 103636 76.22 72.16 5.63 <+/-15% Pass 103065 19.51 18.90 3.23 <+/-15% Pas s 103637 77.82 72.16 7.84 <+/-15% Pass !02830 20.64 18.90 9.21 <+/-15% Pass 103642 79.08 72.16 9.59 <+/-15% Pass 103002 20.18 18.90 6.77 <+/-15% Pass Average Bias (B) 9.82 Average Bia s (B) 6.73 Standard Deviation (S) 4.00 Standard Deviation (S) 2.19 Measure Performance IBl+S 13.81 <15% Pass Measure Per formance IBl+S 8.92 <15% Pass 3rd Quarter 2017 4th Quarter 2017 TLD Reported Delivered Bias P ass/Fail TLD Reported Delivered Bias Pass/Fail Number (mR) (mR) (% diff) Criteria Pass/Fail Number (mR) (mR) (%diff) Criteria Pass/Fail 102253 60.07 60.04 0.05 <+/-15% Pas s 102343 72.30 70.02 3.26 <+/-15% Pass 101122 62.80 60.04 4.60 <+/-15% Pass 102265 72.85 70.02 4.04 <+/-15% Pa ss 103099 60.78 60.04 1.23 <+l-15% P ass 102340 71.25 70.02 1.76 <+/-15% Pass 102288 61.20 60.04 1.9 3 <+/-15% Pass 103972 66.99 70.02 -4.33 <+/-15% Pass 100163 59.82 60.04 -0.37 <+/-15% Pass 103921 68.54 70.02 -2.11 <+l-15% Pass Average Bias (B) 1.49 Average Bias (B) 0.52 Standard Deviation (S) 1.96 Stand ard Deviation (S) 3.60 Measure Performance IBl+S 3.45 <15% Pass Measure Performance IBl+S 4.12 <15% Pass Fait** refe rs to NCR #02147847 Section 5 Page 8 TAB LES.0-B (Con t.) 2017 E NVIRONMENTAL DOS IM E TER C RO SS CH E CK RES ULTS In t erna l C r ossc h eck (D uk e Energy) Radi a tion D os im e try and R eco rd s p a rt ici p a t es in a qu ar terly TLD internal c omp a ri s on pro gra m a dmin is t e red int e rn a ll y by the Dosimetry Lab. T h e Do s imetry Lab St a ff irradi a t es env i ronmenta l do s imetry quarterly a nd s ubmit s them for an a ly s i s of th e un k n o wn e s timated deli ve red e x po s ur e.

1 s t Quarter 2 017 2 nd Qu a rt e r 2 0 17 TLD R epo rt ed Delivered B ias P ass/Fai l TLD R e p orte d D el iver ed B ias P ass/Fa i l Number (mRJ (m R) (% diff) Crite r ia P uss/Fail N umber (m R) (m R) (% diff) C r ile r ia P ass/F a i l 1 02207 49.22 48.0 2.54 <+/-1 5'k 1';, s s 1 02 51 9 46.79 43.0 8.8 1 <+/-154 P ass 1 02208 47.57 48.0 -0.90 <+/-1 5'k P a ss 1 02870 49.1 8 43.0 1 4.37 <+l-15'k P ass 1 034 10 52.06 4 8.0 8.46 <+/-1 5'k Pa ss 10 3 5 37 4 6.05 43.0 7.09 <+/-15% P ass 1 02167 49.65 48.0 3.44 <+/-1 5'k P ass 1 03 5 4 1 47.33 43.0 1 0.07 <+l-15% P ass 1 02079 5 1.39 48.0 7.06 <+/-1 5% P a ss 1 0 3111 48.21 43.0 1 2.1 2 <+/-1 5'k P ass 1 03 4 09 50.33 48.0 4.85 <+/-1 5% P a ss 1 02304 45.04 43.0 4.7 4 <+/-154 P-,ISS 102209 49.32 48.0 2.75 <+/-1 5% P ass 1 02 87 3 47.59 43.0 1 0.67 <+/-1 5% P as s 1022 14 49.46 48.0 3.04 <+/-15'k P ass 1 02872 47.85 43.0 1 1.28 <+/-1 5% P ass 10 2 11 7 49.94 48.0 4.04 <+/-1 5'.:I-Pa ss 10 2 8 7 1 4 7.8 0 4 3.0 11.16 <+l-1 5'k Pa ss 1022 0 1 49.83 48.0 3.81 <+/-15% P as s 1 0286 1 48.11 43.0 1 1.88 <+/-1 5% P ass A ve rage B ias (8) 3.91 Average B ias (8) 10.22 Standard Deviati o n (S) 2.56 St a ndar d De viation (S J 2.74 M easure P erformance IB l+S 6.47 <15'k P ass M eas u re P erfo n na n ce I B l+S 1 2.96 <1 5% P as s 3r d Quar ter 20 1 7 4th Q u ar t er 2017 I TLD R eported Delivered B ias P a ss/Fail TLD R eporte d D elivered Bi as P as s/F a il Number (mRJ (m R) ('k diff) Cri t eria Pass/Fail Numb e r (mR) (mR) ('k di f f) Criteri a Pa ss/F a il 10 1 195 19.81 18.8 5.15 <+/-15% P ass 10395 1 5 0.92 50.0 1.84 <+/-1 5<:r Pu ss 103731 1 9.45 1 8.8 3.24 <+l-15% Pa ss 10 3 949 51.06 5 0.0 2.1 2 <+/-1 5% P a ss 10 1 190 19.90 18.8 5.63 <+/-15% P ass 10 3 950 51.04 50.0* 2.0 8 <+f-1 5 Ck P ass 103532 20.61 18.8 9.39 <+l-1 5'k P ass 1040 11 51.3 8 50.0 2.76 <+/-I 5'k P ass 1 00 3 1 4 19.7 0 18.8 4.56 <+/-15% P us s 10 39 31 51.1 0 50.0 2.2 0 <+I-IS'k Pa ss 1 0 1 264 1 8.93 1 8.8 0.48 <+/-1 5% P ass 1 04004 50.7 4 50.0 1.4 8 <+l-1 5'k Pa ss 1 0 13 45 19.18 1 8.8 1.80 <+l-1 5'k P ass 1 0 3 996 4 9.6 3 50.0 -0.74 <+l-1 5'k Pa ss 1 01397 20.06 1 8.8 6.48 <+/-1 5'k P ass 103 963 52.9 7 5 0.0 5.9 4 <+/-1 5'il-Pa ss 1 00868 20.45 1 8.8 8.55 <+/-15'k P ass 10 3 947 49.17 5 0.0 -1.66 <+I-I 5'k Pa ss 1 03078 20.5 1 18.8 8.86 <+l-15'k P ass 10 3 929 49.88 50.0 -0.2 4 <+/-1 5'k P as s Average B ias (B J 5.41 A v erage B i a s (D) 1.58 Standard D eviation (S) 3.01 St andar d D ev i a t ion (S) 2.1 2 M e a s ur e P erfonnance I B l+S 8.43 <1 5'k P ass Mea s ur e Pe r forma nce I B l+S 3.7 0 <1 5'k P ass S ec tion 5 -P age 9

---*--------------------- APPENDIX A ENVIRONMENTAL SAMPLING & ANALYSIS PROCEDURES , A p pen d i x A -P ag e I APPENDIX A ENVIRONMENTAL SAMPLING AND ANALYSIS PROCEDURES Adherence to established procedures for sampling and analysi of all environmental media at Oconee Nuclear Station is required to ensure compliance with Station Selected Licensee Commitments. Analytical procedures were employed to ensure that Selected Licensee Commitments detection capabilities were achieved. Environmental sampling and analyses were performed by EnRad Laboratories, Dosimetry and Records, and the Environmental Water Resources Group. Section IV of this appendix describes the environmental sampling frequencies and analysis procedures by media type. I. CHANGE OF SAMPLING PROCEDURES Location 063 Shoreline Sediment (Lake Hartwell Hwy 183 Bridge (0.80 mi. ESE)) was replaced with location 091 Shoreline Sediment (Holders Landing Road (2.09 mi. S)) due to location 063 safety and access concerns (NCR# 02053661). 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 samples such as fish and broadleaf vegetation are ground to achieve a homogeneous mixture. Soils and sediments are dried, sifted to remove foreign objects (rocks, clams, glass, etc.) then transferred to appropriate counting geometry. Low-level iodine analyses are performed by passing a designated sample aliquot through a pre-weighed 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 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 2900TR liquid scintillation system or PerkinElmer 3 lOOTR liquid scintillation system. Tritium samples are distilled and batch processed with a laboratory fortified blank, matrix spike, matrix spik~ duplicate, and blank to verify instrument performance and sample preparation technique are acceptable.

Appendix A -Pa g e 2 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 PROCEDU RE S The tritium preparation procedure was modified during 2017 to align with ASTM Method D4107-08, Standard Test Method for Tritium in Drinking Water; Water and Environmental Technology, Volume 11.02. 2014 Edition. Tritium dark adaptation times were also reduced (NCR# 02134015). IV. SAMPLING AND ANALYSIS PROCEDURES A.1 AIRBORNE PARTICULATE AND RADIOIODINE Airborne particulate and radioiodine samples at each of six locations were composited continuously by means of continuous air samplers. Air particulates were collected on a particulate filter and radioiodines were c9llected 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 perfonned on each charcoal cartridge. A weekly gross beta analysis was performed on each filter. A quarterly gamma analysis was performed on the quarterly filter composite (by location). The continuous composite samples were collected from the locations listed below. Location 077 = Skimmer Wall (1.00 mi. SW) Location 078. l = Recreation Site (0.53 mi. WSW) Location 079 = Keowee Dam (0.56 mi. NE) Location 081 = Clemson Operations Center (9.33 mi. SE)(Control) Location 084 = Sue Craig Road (2.58 mi. NNE) Location 085 = Lake Services/ Building B9125 (0.88 mi. NNW) A.2 DRINKING WATER Monthly composite samplers were operated to collect an aliquot at least every two hours. Gross beta and gamma analysis was performed on the monthly composites. Tritium analysis was perfonned on the quarterly composites. The composites were collected monthly from the locations listed below. Location 060 = Greenville Water Intake Rd. (3.23 mi. NE) Location 064 = Seneca (6.67 mi. SSW)(Control) Location 066 = Anderson (18.9 mi SSE) Append1 K A

P a ge 3 A.3 SURFACE WATER Monthly composite samplers were operated to collect an aliquot at least every two hours. Gamma analysis was performed on the monthly composites.

Tritium analysis was performed on the quarterly composites sample. The composites were collected monthly from the locations listed below. A.4 MILK Location 062 = Lake Keowee Hydro Intake (0.85 mi. ENE)(Control) Location 063.1 = Lake Hartwell Hwy 183 Bridge (0.79 mi. E) Biweekly grab samples were collected at one location although the Oconee ODCM requires semimonthly samples. Biweekly grab samples are taken to meet the required sample frequency for scheduling purposes. A gamma and low-level Iodine-131 analysis was performed on each sample. The biweekly grab samples were collected from the location li s ted below. Location 071 = Clemson Dairy ( 10.2 mi. SSE)(Control) A.5 BROADLEAF VEGETATION Monthly samples were collected and a gamma analysis was performed on each sample. The samples were collected from the locations listed below. A.6 FISH Location 077::: Skimmer Wall (I .00 mi. SW) Location 079 = Keowee Dam (0.56 mi. NE) Location 081 = Clemson Operations Center (9.33 mi. SE)(Control) Location 084 = Sue Craig Road (2.58 mi. NNE) Semiannual samples were collected and a gamma analysis was performed on the edible portions of each sample. The samples were collected from the locations listed below. Location 060 = Greenville Water Intake Rd. (2.28 mi. NE)(Control) Location 063 ::::; Lake Hartwell Hwy 183 Bridge (0.80 mi. ESE) Location 067 = Lawrence Ramsey Bridge Hwy 27 (4.34 mi. SSE) A.7 SHORELINE SEDIMENT Semiannual samples were collected and 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 067 = Lawrence Ramsey Bridge Hwy 27 (4.34 mi. SSE) Location 068 = High Falls County Park ( 1.82 mi. W)(Control) A p pen dix A P age 4 Location 091 = Holders Landing Road (2.09 mi. S) A.8 DIRECT GAMMA RADIATION (TLD) Thennoluminescent dosimeter s (TLD) were collected quarterly at fifty locations. A gamma exposure rate was detennined for each TLD. The TLDs were placed as indicated below. *

An inner rin g of 1 7 TLD s , one in each meteorological sector in the general area of the ite boundary.

An outer rin g of 16 TLD s , one in each meteorological sector in the 6 to 8 kilometer range. The remaining TLD were placed in pecial interest areas such as population center , re s idential area s , schools, and control locations. TLD Locations are listed in Table 2.1-B. A.9 ANNUAL LAND USE CENSUS An annual Land U s e Cen s u s was conducted to identify within a distance of 8 kilometers (5.0 miles) from the station, the following locations in each of the sixteen meteorological sectors: *

The Nearest Residence The Nearest Milk-giving Animal (cow, goat, etc.) where milk is used for human consumption The census was conducted during the growing season 5/24 -5/25/2017.

Results are shown in Table 3.9. No changes were made to the sampling procedures during 2017 as a result of the 2017 census. V. GLOBAL POSITIONING SYSTEM (GPS) ANALYSIS The Oconee site centerline used for GPS measurements was referenced from the Oconee Nuclear Station Updated Final Safety Analysis Report (UFSAR), section 2.1.1.1, Specification of Location. Waypoint coordinates used for ONS GPS measurements were latitude 34°-47'-38.2"N and longitude 82°-53'-55.4" W. Maps and tables were generated using North American Datum (NAO) 27. Data normally reflect accuracy to within 2 to 5 meters from point of measurement. 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 5

* --*-***-**---* -*-**-------:* *, I I *, *, APPENDIXB RADIOLOGICAL ENVIRONMENTAL MONITORING

,, PROGRAM **

SUMMARY

OF RESULTS Appen d ix B -P age I OCONEE NUCLEAR STATION RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM DA TA

SUMMARY

Oconee Nuclear Station Oconee County, South Carolina Medium or Pathway Type and Lower Limit Sampled or Measured Total No. of of Detection (Unit of Measurement) Measurements (LLD)°1 Performed Air Particulate Gross Beta See Table 2.2-C (pCi/m') 3 J 8(4X 61 Gamma See Table 2.2-C 30 (4H61 Air Radio iodine Gamm a Sec Table 2.2-C (pCi/m') 3 J8 1 4r.M Drinking Water Gross Beta 4 (pCi/1) 42'**11 Gamma Sec Table 2.2-C 42 14 M1l Tritium 15 1 4 11 7) 2000 Surface Water Gamma Sec Table 2.2-C (pCi/l) 28'*111 , Tritium 2000 10 1 4~71 Milk Gamma Sec Table 2.2-C (pC i/1) 26 1-131 Sec Table 2.2-C 26 All Indicator Locationsm '31 Mean Ran2e 2.36E-2 (265/26 5) l .02E-2 -4.87E-2 All less than LLD All less than LLD 1.20 ( 18/28) 0.69-1.90 All lc,;s than LLD 419 (5/10) 289 -563 All less than LLD 5564 (5/5) 2580 -10900 No Indicator Location No Indicator Location Appe n d ix B

Page 2 Docket Numbers 50-269, 270. 287 Calendar Year 2017 Location w/Highest Annual Mean Control Locations Name, Distance, Mean Mean and Direction Range1211.,1 Range 121 1 31 081 (9.33 mi SE) 077 2.58E-2 (53/53) 2.28E-2 (53/53) (1.00 mi SW) I .39E-2 -4.87E-2 I. IOE-2-4.48 E-2 --------All less th a n LLD --*--------All less than LLD 064 (6.67 mi SSW) 066 1.25 ( 14/14) 1.19 (9/14) ( 18.9 mi SSE) 0.71 -1.90 0.80-1.8 6 ----------All less than LLD 066 419 (5/5) All less than LLD (18.9 mi SSE) 289 -563 -----........... All less than LLD 063.1 5564 (5/5) All less than LLD (0.79 mi E) 2580-10900 ----------All less than LLD ----------All less than LLD No.of Non-Routine Report Meas. 0 0 0 0 0 0 0 0 0 0 OCONEE NUCLEAR STATION RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM DA TA

SUMMARY

O c onee Nu cl ear Statio n Oconee County , South Carolina Medium or Pathway T y pe and Lower Limit Sampled or Measured Total No. of of Detection (Unit of Measurement) Measurements (LLD)'11 Performed Broadlcaf V e g e t ation G a mm a Sec T ab l e 2.2-C (pC i/k g , wet) 48 C s-1 37 80 Fi s h G am m a Sec Ta bl e 2.2-C (pC i/k g. we t) 12 C s-1 37 15 0 Scd i m c nt s--S hor e li ne G amm a Sec Table 2.2-C (pCi/k g, d ry) 6 Cs-1 37 1 80 TLD TLD R e ad o ut (mR per qu a rter) 151 -----200 All Indicator Locations (21 (J I Mean Ranee 39.4 ( 1/36) 3 9.4 -39.4 17.3 (l/8) 17.3 -17.3 7 8.9 (3/4) 38.6 122 2 0.4 (19 2/19 2) 8.99 34.7 Appe n dix B -Page 3 Dock e t N umb e r s 50-2 69 , 27 0 , 287 Calendar Y ea r 2 0 17 **Location w/Highest Annual Mean Control Locations Name , Distance, Mean Mean and Direction Range 1 2 101 Rarige<2 l (J I 08 4 39.4 ( 1/12) All l ess th a n L LD (2.5 8 mi NNE) 39.4-39.4 All l ess than LLD 067 17.3 (1/4) (4.34 m i SS E) 17.3 -17.3 091 122 ( 1/2) All less t h an LLD (2.09 m i S) 122 -122 V:>O (\U':I m , W:Svv) 02 4 29.2 (4/4) 08 I (9.3 3 mi SE) 26.5 (8/8) (0.81 mi E) 25.0 3 4.7 1 7.9-34.7 No.of Non-Routine Report Mea s. 0 0 0 0 Footnotes to Appendix B I. The Lower Limit of Detection (LLD) is the smallest concentration of radioactive material in a samp le 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 explana tion of how LLD values were d erived. 2. Mean and range are based on detectable measurements only. 3. The fractions of all samp le s with detectable activities at specific lo cations are indicated in p arentheses.

4. Missing samp le s or surveillances are discussed in Appendix C or Appendix D. S. TLD exposure is reported in milliroentgen (mR) per standard quarter (91 days). TLD data indicated in section 3.8 (Direct Gamma Radiation) are reported in mrem /yr (n " 0.95 ergs/g-Roentgen) 2* 6. Gamma filter composite calendar reconciliation period, 2017 (NCR# 02174505).

7. Tritium cornposit~ calendar reconci liation period , 2017 (NCR # 0 2 17 4946). 2 Cember. H. (2009). ln1rodu c 1iQn t o H ea lth Phy s i cs. 4*h Edition. Uni1ed States: McG raw-Hill Comp an i es. Inc. Appcndi, B

Page 4 APPENDIXC SAMPLING DEVIATIONS

& UNA VAIL.ABLE ANALYSES Appendi x C

Page I APPENDIXC OCONEE NUCLEAR STATION SAMPLING DE VIA TIO NS & UNAVAILABLE ANALYSES DEVIATION

& UNAVAILABLE REASON CODES BF Blown Fu se PM Preventive Maintenanc e CN Construction PO Power Outa2e FZ Sample Frozen PS Pump out or service I Under2oin2 repair IV Insufficient Volume SL Samole Loss/Lost due to Lab Accident IW Inclement Weather SM Motor/ R o tor Seized LC Line Clog to Samoler SU Sea so nally Unavailable OT Other TF Torn Filter Pl 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 s urv eillance 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 sa mple is classified as an " Unavailable Analyse s" and does not have any data report ed. The air samplers operated for a total of 99.1 % availability in 2017. Scheduled Description & Corrective Location Collection Dates Code Action to Prevent Recurrence Action 079 1/3-1/9/2017 Pl 3.23 hours downtime, undetermined cause. NCR # 02090890 4.78 hour s down tim e due to seve re thunderstorm/hi gh 077 2/27 -3/6/2017 Pl winds. NCR# 02106181 4.77 hour s downtime due to severe thunder s torm/h ig h 078.1 2/27 -3/6/20 17 PI winds. NCR# 02106182 2.54 hours downtime due to severe thunderstorm/hi g h 079 'J,./27 -3/6/2017 PI wind s. NCR# 02106183 084 6/19 -6/26/2017 PI 2.67 hours downtime due to severe thunderstorm. NCR # 02133946 078.l 7/ I 0-7/17/2017 PI 14.2 8 hour s downtime due to severe thunderstorm. NCR# 02137725 1.05 hours downtime du e to Keo wee main step-up 079 7/3) -8nt2017 CN tran sfo rmer relocation. NCR# 02142061 0.93 hours downtime du e to old Keowee s tep-up 079 8/7 -8/14/2017 CN transformer removal. NCR # 02144093 38.22 hours downtime due to severe weather/high wind s 078.1 9/11 -9/18/2017 IW associated with Hurricane Irma remnant s. NCR# 02151980 38.25 hours downtime due to severe weather/high winds 077 9/11-9/18/2017 IW associated with Hurricane Irma remnants. NCR# 0215 1979 8.64 hours downtime due to severe weather/high winds 085 9/11 -9/18/2017 IW associated with Hurri cane Irma remnants. NCR# 0 2 151981 078. I 10/2 -10/9/2017 Pl 142.95 hours downtime due to power line short. NCR# 02157384 078.1 I 0/9 -I 0/16/20 17 PO 149.78 hours downtime due to power line short. NCR # 0 2 158886 078.1 l 0/16 -10/23/20 l 7 Pl 4.30 hours downtime due to power line s hort. NCR # 02160541 077 I 0/23 -l 0/30/20 I 7 Pl 1.59 hours downtime due to severe s torms/high winds. NCR# 02161951 078.1 I 0/23 -l 0/30/2017 PI 1.58 hours downtime due to severe storms/high wind s. NCR#0 216 195 2 085 12/l l -12/18/2017 Pl 0.48 hours downtime , undetermined cause. NCR# 02174842 Append ix C -Page 2 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." 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 drinking and surface water samplers operated for a total of 98.3% availability in 2017. D. k' Wt rm mg a er Scheduled Description & Corrective Location Collection Dates Code Action to Prevent Recurrence Action Pump failure during composite period caused 200 hours of downtime. Ava i lable composite collected nnd n grab sample was taken. Pump was replaced and normal 060 5/22 -6/19/2017 PS samplin~ resumed. NCR # 02132275 Surface Water Scheduled Description & Corrective Location Collection Dates Code Action to Prevent Recurrence Action Power interruption attributable to severe weather on 5/22/2017 caused the sampler pump to switch to halt mode. A grab sample wa~ taken and pump wa s returned 063.1 5/22 -6/19/20 I 7 PI to normal operation on 6/19/2017. NCR# 02132276 The reservoir pump was inoperable at time of collection. Work request # 20086506 initiated. The reservoir pump 062 9/11 10/9/2017 PS was replaced and normal sampling resumed. NCR# 02157381 C.2 UNAVAILABLE ANALYSES There were no unavailable analyses during 2017. Appendix C

Page 3 L __ -APPENDIXD ANALYTICAL DEVIATIONS No Analytical deviations were incurred for the 2 017 Radiological Environmental Monitoring Program A ppendi:x D -Page 1

-** -*-*-----APPENDIXE RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM RESULTS : 2017 This appendix includes sample analysis rep011 summaries and s upportive data generated from each sample medium for 2017. A ppendix E -Pa ge l OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: AIR PARTICULATE Concentration (Activity)

pCi/m3 Sample Point 077 (INDICATOR*

SW@ 1 miles) Sample ID: 431833 Sample Dates: 12/27/2016 -113/2017 Nuclide Activity 2 Sigma Error MDA Beta 1 78 E-02 2 81E 0 3 2.97 E-03 Sample ID: 432240 Sample Dates: 113/2017 -1/912017 Nuclide Activity 2 Sigma Error MDA Beta 2 0 1E-02 3 56 E-03 4.1 3E-0 3 Sample ID: 432934 Sample Dates: 1/912017. 1/16/2017 Nuclide Activity 2 Sigma Erro r MDA Be t a 2 1 6E-0 2 3 1 8E-0 3 3.4 3 E-03 Sample ID: 433330 Sample Dates: 1/1612017 -1/23/2017 Nuclide Activity 2 Sigma Erro r MDA Be t a 1 7 0E-0 2 2 6 9 E-0 3 3.00 E-03 Sample ID: 433749 Sample Dates: 1/2312017

1/30/2017 Nuclide Activity 2 Sigma Error MDA Bet a 1 79E-02 2 69E-03 2.99E-03 Sample ID: 434489 Sample Dates: 1130/2017

-2/6/2017 Nuclide Activity 2 Sigma Error MDA Bet a 2 6 6E-0 2 3 37E-0 3 3.3 0E-03 Sample ID: 435135 Sample Datu: 2/612017 -2/1312017 Nuclide Activity 2 Sigma Error MDA Beta 2 6 5E-02 3 32 E 0 3 3 07E-03 Sample ID: 43S836 Sample Oates: 2/13/2017

212012017 Nuclide Activity 2 Sigma Error MDA Be t a 1 95E-0 2 2 7 8E-0 3 2 97E-0 3 Sample ID: 436288 Sample Dates: 2/2012017

-2/27/2017 Nuclide Activity 2 Sigma Error MDA Be t a 2 4 7E--0 2 2.8 7 E-0 3 2.6 9 E-0 3 Sample ID: 436744 Sample Dates: 2/27/2017 -3/6/2017 Nuclide Activ i ty 2 Sigma Erro r MDA Be t a 2 32E-0 2 3.1 8E-03 3.0 1 E-03 Sample ID: 437815 Sample Dates: 3/6/2017 -3/13/2017 Nuclide Activity 2 Sigma Error MDA Be t a 2 1 3E-0 2 3.0 7E-0 3 3.18 E-0 3 I Sample ID: 438328 Sample DatH: 3/13/2017 -3120/2017 Nuclide Activity 2 Sigma Error MDA B e la 2.1 3E-0 2 2 9 1 E 03 3 17 E-03 Sample ID: 438833 Sample Dates: 3/20/2017

3/27/2017 Nuclide Activity 2 Sigma Error MDA Be t a 2.54E-0 2 2.90E-0 3 2 66E-0 3 Sample ID: 439215 Sample Oates: 12/27/2016. 3/27/2017 Nuclide Activity 2 Sigma Error MCA Cs-134 <5 9 9E-04 0.0 0 E+O O 5.9 9E-04 Cs-137 <5 1 8E-04 O.OO E+OO 5.18 E-04 Be-7 1 9 1E-0 1 2 77E-0 2 9.8 6E-03 K-4 0 <1 16 E-0 2 O.OO E+O O 1 1 SE-0 2 Sample ID: 439209 Sample Dates: 3/27/2017
4/3/2017 Nuclide Activity 2 Sigma Error MDA Beta 1 91 E-02 3 0 2E-0 3 3 29E-03 Sample ID: 440037 Sample Dates: 4/3/2017 -4/10/2017 Nuclide Activity 2 Sigma Error MDA Beta 2 0 7E-0 2 31 2 E--03 3 31E-0 3 Sample ID: 440625 Sample Dates: 4/10/2017

-4/17/2017 Nuclide Activity 2 Sigma Error MCA Beta 2 94 E-0 2 3 4 9 E-0 3 3 34E-0 3 Sample ID: 441441 Sample Oates: 4/17/2017 -4/24/2017 Nuclide Activity 2 Sigma Error MCA Beta 1 74 E-0 2 2.8 9 E-0 3 3 1 6E-0 3 Sample ID: 441890 Sample Datu: 4 1 24/2017. 5/112017 Nuclide Activity 2 Sigma Error MDA Beta 1.4 6 E-02 2.9 2E-03 3 61E-03 Sample ID: 442351 Sample Dates: 5/1/2017 -5/812017 Nuclide Activity 2 Sigma Error MDA Beta 2 06E-02 2 71E-03 2.68E-0 3 Sample ID: 442894 Sample Dates: 5/8/2017 -5/15/2017 Nuclide Activity 2 Sigma Error MDA Beta 2 88E-0 2 3.4 5 E-03 3.2 8 E-0 3 Sample ID: 443334 Sample Dates: 5/15/2017. 5/22/2017 Nuclide Activity 2 Sigma Error MDA B e ta 3.06E-0 2 3.1 2E-0 3 2.64 E-0 3 Sample ID: 443886 Sample DatH: 5/2212017 -5130/2017 Nuclide Activity 2 Sigma Error MDA Beta 1 6BE-0 2 2.7 0 E-0 3 2.98E-0 3 Sample ID: 444293 Sample Dates: 5/3012017

6/5/2017 Nuclide Acti*lty 2 Sigma Error MOA Beta 3 4 7E-Q2 4 1 9E-0 3 4.06E-0 3 Report Generated@

3/21/20 1 8 14*30*38 C E!li) EnRad Laboratories Appendix E -Page 2 of 93 Duke Energy Annual Report -Append i x E 13339 Hagers Fe r ry Road Huntersville , North Ca r olina 28078 OCONEE Radiological Environmental Monitoring

Analysis Report -2017 (Appendix E) Media Type: AIR PARTICULATE Concentration (Activity)

pCi/m3 Sample Point 077 [ INDICATOR

-SW@ 1 miles) Sample ID: 445355 Sample Dates: 61512017 -6/12/2017 Nuclide Activity 2 Sigma Error MOA Beta 1.97E-02 2 77E-0 3 2 95E-03 Sample ID: 446355 Sample Dates: 6112/2017 -8/19/2017 Nuclide Activity 2 Sigma Error MOA Beta 2 12E-02 2 75E-03 2 76E-03 Sample ID: 446853 Sample Oates: 6119/2017 -6/26/2017 Nuclide Activity 2 Sigma Error MOA Beta 1.44E-02 2 84E-03 3 40E-03 Sample ID: 447227 Sample Oates: 3127/2017 -6/26/2017 Nuclide Activity 2 Sigma Error MCA Cs-134 <4.59E-04 O.OOE+OO 4 59E-04 Cs-137 <4 70E-04 O.OOE+OO 4 70E-04 Be-7 166E-01 2 72E-02 6 1 5E-03 K-40 <1 09E-02 0.00E+OO 1 09E-02 Sample 10: 447221 Sample Dates: 6/26/2017 -7/3/2017 Nuclide Activity 2 Sigma Error MOA Beta 2 40E-02 2 89E-03 2 76E-03 Sample ID: 447837 Sample Oates: 7/3/2017

7/10/2017 Nuclide Activity 2 Sigma Error MCA Beta 2 15E-0 2 3 14E-03 3.24E-03 Sample ID: <<8305 Sample Oates: 7/1012017

-7/17/2017 Nuclide Activity 2 Sigma Error MOA Beta 2.90E-02 3.46E-03 3.22E-03 Sample ID: 448921 Sample Dates: 711712017 -7/24/2017 Nuclide Activity 2 Sigma Error MOA Beta 3.94E-02 3.95E-03 345E-03 Sample ID: 449250 Sample Dates: 712412017 -7/3112017 Nuclide Activity 2 Sigma Error MDA Beta 3.04E-02 3.57E-03 3.43E-03 Sample ID: 449970 Sample Oates: 7/31/2017 -817/2017 Nuclide Activity 2 Sigma Error MDA B (!ta 2.75E-02 3.07E-03 2 66E-03 Sample ID: 450237 Sample Dates: 81712017 -8/14/2017 Nuclide Activity 2 S igma Error MCA Beta 2.13E-02 3.06E-03 3.06E-03 Sample ID: 450754 Sample Dates: 811412017 -812112017 Nuclide Activity 2 Sigma Error MDA Beta 3.25E-02 3.62E-03 3 25E-03 Sample ID: 451218 Sample Dates: 8/2112017. 8/2812017 Nuclide Activity 2 Sigma Error MOA Beta 3 82E-02 3 91E-03 3 39E-03 Sample ID: 451561 Sample Dates: 8/28/2017 -91512017 Nuclide Act ivity 2 Sigma Error MDA Beta 2 03E-02 2 51E*03 2 45E-03 Sample ID: 452395 Sam pie Dates: 9/512017

9/1112017 Nuclide Activity 2 Sigma Error MDA Beta 2 67E-02 3 78E-03 3 96E-03 Sample ID: 452814 Sample Oate s: 9/11/2017.

9/18/2017 Nuclide Activity 2 Sigma Erro r MDA Beta 3 62E-02 3 93E-03 3.5 1 E-0 3 Sample ID: 452969 Sample Oates: 9118/2017 -9/2512017 Nuclide Activity 2 Sigma Error MOA Beta 4 87E-02 4 34E-03 3.49E-03 Sample ID: 454248 Sample Oates: 612612017

9/25/2017 Nuclide Activity 2 Sigma Error MOA Cs-134 <1.42E-03 0 OOE+OO 1.42E-03 Cs-137 <1.52E-03 OOOE+OO 1.52&0 3 Be-7 2.0SE-01 4.30E-02 2.85E-02 K-40 <2.72E-02 0 OOE+OO 2 72E-02 Sample ID: 453473 Sample Oates: 9/2512017

-101212017 Nuclide Activity 2 Sigma Error MDA Beta 3.SBE-02 3.82E-03 3.39E-03 Sample ID: 454242 Sample Dates: 1012/2017

1019/2017 Nuclide Activity 2 Sigma Error MDA Beta 2.29E-02 3.27E-03 3 57E-03 Sample ID: 455105 Sample Dates: 10/912017

-1 0/16/20 17 Nuclide Activity 2 Sigma Error MDA Beta 2 02E-02 2 71E-03 2 72E-03 Sample ID: 455441 Sample Dates: 1011612017 -10123/2017 Nuclide Activity 2 Sigma Error MDA Beta 2 39E-02 2 83E-03 2 57E-0 3 Sample ID: 456071 Sample Oates: 1012312017 -10130/2017 Nuclide Activity 2 Sigma Error MDA Beta 1 39E-02 2 48E-03 2.88E-03 Report Generated@ 3/21/201814

30: 38 ({i@ EnRad Laboratories Append i x E -Page 3 of 93 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078 OCONEE Radiological Environmental Monitoring Ana*lysis Report* 2017 (Appendix E) Media Typ11: AIR PARTICULATE Concentration (Activity)

pCi/m3 Sample Point 077 (INDICATOR*

SW@ 1 miles] Sample ID: 461437 Sample Dates: 10/30/2017 -11/6/2017 Nuclide Activity 2 Sigma Error MDA Beta 2.84E-02 2 96E-03 2.46E-03 Sample ID: 461993 Sample Dates: 11/6/2017 -11/13/2017 Nuclide Activity 2 S i gma Error MDA Beta 2 52E-02 3 01E-0 3 2 89E-03 Sample ID: 462632 Sample Dates: 11/13/2017 -11/20/2017 Nuclide Activity 2 Sigma Error MDA B eta 3 18E-02 3 58E-0 3 3 19E-03 Sample ID: 463121 Sample Oates: 11/20/2017 -11/27/2017 Nuclide Activity 2 Sigma Erro r MDA Beta 3.25E-02 3 58E-03 3 13E-03 sample ID: 463531 Sample Dates: 11/27/2017. 12/4/2017 Nuclide Activity 2 Sigma Error MDA Beta 4.04E-02 3.85E-03 3 07E-03 Sample ID: 464172 Sample Dates: 12/4/2017 -1 2/11/2017 Nuclide Activity 2 Sigma Error MDA Seta 3.42E-02 3.64E*0 3 3.09E-03 Sample I D: 464729 Sample Dates: 12/11/2017 -12/18/2017 Nuclide Activity 2 Sigma Error MDA Beta 2.55E-02 3.33E-03 3.38E-03 Sample ID: 464995 Sample Dates: 12/18/2017 -12/26/2017 Nuclide Activity 2 Sigma Error MDA Beta 2.45E-02 3 OSE-03 3 01E-03 Sample ID: 465662 Sample Dates: 9/25/2017 -12126/2017 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.40E-03 0 OOE+OO 1 40E-03 Cs-137 <1 51E-03 O.OOE+OO 1 51E-03 Be-7 1 57E-01 3 52E-02 2 4 0E-02 K-40 <2 41E-02 0 OOE+OO 2 41E-02 $ample ID: 465231 Sample Dates: 12126/2017. 1/2/2018 Nuclide Activity 2 S i gma Error MDA Bet a 4.03E-02 3.83E-03 3.04E-03 Cs-134 <1.31E-02 0 OOE+OO 1 31E-02 Cs-137 <8.08E-03 0 OOE+OO 8.0BE-03 B e-7 <1.55E-01 0 OOE+OO 1.55E-0 1 K-40 <1.69E-01 0 OOE+OO 1 69E-0 1 Samp l e Point 078.1 [ INDICATOR -WSW@0.53 miles] Sample ID: 431834 Sample Dates: 12/27/2016 -1/3/2017 Nuclide Activity 2 Sigma Error MDA Be ta 1 34E-02 2 57E-03 2 97E-03 Samp l e ID: 432241 Sample Oates: 1/3/2017 -1/9/2017 Nuclide Activity 2 Sigma Error MOA Beta 1 78E-02 3 45E-03 4 14E-03 Sample ID: 432935 Sample Dates: 1/9/2017 -1/16/2017 Nuclide Activity 2 Sigma Error MDA Beta 1 74E-02 2 97E-03 3.43E-03 Sample ID: 433331 Sample Oates: 1/16/2017 -1/23/2017 Nuclide Activity 2 Sigma Error MOA Beta 1.56E-02 2 , 62E-03 306E-03 Sample ID: 433750 Sample Dates: 1/23/2017 -1/30/2017 Nuclide Activity 2 Sigma Error MDA Beta 1 55E-02 2.SBE-03 2 99E-03 Sample 10: 434490 Sample Datea: 1/30/2017 -2/6/2017 Nuclide Activity 2 Sigma Error MOA Beta 2 36E-02 3 24E-03 3 30E-03 Sample ID: 435136 Sample Dates: 2/8/2017 -2/13/2017 Nuclide Activity 2 Sigma Error MDA Beta 2 43E-02 3 21E-03 3 07E-03 Samp l e I D: 435837 Sample Dates: 2113/2017 -2/20/2017 Nuclide Activity 2 Sigma Error MDA Beta 1.51E-02 2.57E-03 2 98E-03 Sample ID: 436289 Sample Dates: 2120/2017. 2127/2017 Nuclide Activity 2 Sigma Error MOA Beta 2.27E-02 2. 78E-03 2 69E-03 Samp l e ID: 436745 Sample Dates: 212712017 -3/6/2017 Nuclide Activity 2 Sigma Error MDA Beta 2 37E-02 3.21E-03 3.0 1E-03 Sample ID: 437616 Sample Dates: 316/2017 -3/13/2017 Nuclide Activity 2 Sigma Error MDA Beta 1 68E-02 2 84E-03 3. 18E-03 Sample ID: 438329 Sample Dates: 3/13/2017

3/20/2017 Nuclide Activity 2 Sigma Error MDA Beta
1 BSE-02 2.82E-03 3 22E-03 Report Generated@

3/21/2018 14: 30*38 c{i ij]) EnRad Laboratories Appendix E -Page 4 of 93 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersv1 I e , North Carolina 28078 OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: AIR PARTICULATE Concentration (Activity)

pC i/m3 Sample Point 078.1 ( I NDICATOR *WSW@ 0.53 miles J Sample ID: 438834 S a mple Dat es: 3/20/2017. 3/27/2017 Nuclide A c t i vity 2 S i gm a Erro r MOA Be ta 2.0 4E-02 2 69E-0 3 2 6 6E-03 Sample ID: 439216 Samp l e Datea: 12/27/2016

-3/27/2017 Nuclide Act i v i ty 2 S i gma Error MDA C s-134 <4.93 E-0 4 O.OOE+OO 4 93E-04 C s-137 <5.52 E-04 O.OOE+OO 5 52E-04 Be-7 1.66 E-01 2 59E-0 2 1 06 E-02 K-4 0 <1.34 E-0 2 O.OOE+O O 1 34E-02 Sample ID: 4 3 9210 Sa m ple D a tes: 3/27/2017

4/3/2017 Nuclide Act i vity 2 Sigma Error MDA Beta 1.6 0 E-0 2 2.B6E-03 3 2 B E-03 Sample ID: 4400 3 8 Sample Dates: 4/3/2 0 17
4/10/2017 Nuc li de A c tiv i ty 2 Sigma Error MDA B e t a 1.72 E-02 2.95E-0 3 3.3 1 E-03 Sample ID: 440626 Sample Datas: 4/10/2017

-4/17/2017 Nuclide Activity 2 Sigma Error MDA B e t a 2.4 0E--02 3.26E-03 3.3 4 E-03 Sample ID: 441442 Sample Datea: 4/17/2017. 4/24/2017 Nu c lide Activity 2 Sigma Error MDA Beta 1.30E-02 2.65E-0 3 3.17 E-03 SamptelD: 441891 Sample Date s: 4/24/2017 -5/1/2017 Nuclide A cti vity 2 S i gma Error MDA B e ta 1.54 E-02 2 96E-0 3 3.6 1 E-03 Sample ID: 442352 Sample DatH: 5/1/2017 -5/8/2017 Nuclide Activity 2 Sigma Error MDA B eta 1.83 E-02 2.60E-03 2.68 E-0 3 Sample ID: 442895 Sample Dates: 5/8/2017 -5/15/2017 Nuclide A c tivity 2 Sigma Er r or MDA Bet a 2.2 1E-0 2 3 16E-03 3.28 E-0 3 Sample ID: 443335 Sample Dates: 5/15/2017 -5/22/2017 Nuclide Activ i ty 2 Sigma Error MDA B e t a 2.5 9E-0 2 2 94E-03 2.64 E-03 Sample ID: 443887 Sampl e Dates: 5/22/2017

5/30/2017 Nuclide A c tivity 2 Sigm a Error MDA B eta 1.4 8E-02 2 60E-03 2 98E-0 3 Sample ID: 444294 Sample Dates: 5/30/2017

-6/5/2017 Nuclide Activity 2 S i gma Error MDA B e ta 2.6 1E-0 2 3 8 1E-03 4 06E-03 Sample ID: 445356 Sample Dates: 6/5/20 1 7 -6/12/2017 Nuclide Activity 2 Sigma Error MDA B e ta 1.8 1 E-02 2 70E*0 3 2 96E-03 Sample ID: 446356 Sample Dates: 611212017 -6/1912017 Nuclide Activity 2 Sigma Erro r MDA B e la 2 O OE-02 2.7 0E.Q3 2.76E-0 3 Samp l e ID: 446854 Sample Datu: 6/19/2017 -6/26/2017 Nuclide Activity 2 Sigma Error MDA Be t a 1.42E-02 2.83E-0 3 3.4 0E-03 Sample ID: 447228 Sample Dates: 3/27/2017 -6126/2017 Nuclide Activity 2 Sigma Error MDA Cs-134 <5 77E-04 O.OOE+OO 5 77 E-04 C s-13 7 <5.3 7E-04 O.OOE+OO 5.37 E-04 Be-7 1.7 0 E-01 2.4 5E-0 2 8.64 E-03 K-40 1 05 E-02 6.04E-03 6 1 9E-03 Sample ID: 447222 Sample Dates: 6/26/2017 -7/3/2017 Nuclide Act i vity 2 S i gma Error MOA Beta 1.96E-0 2 2.69E-03 2 7 6E-03 Sample ID: 447838 Sample Dates: 7/312017 -7/10/2017 Nuclide Activity 2 Sigma Error MOA Be ta 2 01E-02 3 07E-03 3.25E-0 3 Sample ID: 448306 Sample Dates: 7/10/2017 -7/16/2017 Nuclide Act i vity 2 S i gma Error MDA Beta 2 2 2 E-02 3.34 E-03 3.51E-0 3 Sample ID: 448922 Sample Dates: 7/17/2017. 7/24/2017 Nuclide Act i vity 2 Sigma Error MDA Beta 3 44E-0 2 3.7 6E-03 3.4 5E--03 Sample ID: 449251 Sample Dates: 7/24/2017

7/31/2017 Nuclide Activity 2 Sigma Error MOA Be t a 2.2 8 E-0 2 3.24E-03 3.4 3 E-03 Samp l e ID: 449971 S a mple Oates: 7/31/2017.

8/7/2017 Nuclide Activity 2 Sigma Error MDA Beta 2.38E-0 2 2.92E-03 2.8 6E-03 Sample ID: 450238 Sample DatH: 8/7/2017

8/14/2017 Nuclide Activity 2 Sigma Error MDA Beta 1 SO E-0 2 2.73E-0 3 3.06E-03 Report Generated@

3/21/201814

30: 38 c@ EnRad Laboratories Append , x E -Page 5 of 93 Duke Energy Annual Report -Appendi x E 13339 Hagers Ferry Road Huntersville , North Carolina 28078 OCONEE Radiological Environmental Monitoring Analysis Report* 2017 (Appendix E) Media Type: AIR PARTICULATE Concentration (Activity):

pCilm3 Sample Point 078.1 [INDICATOR* WSW@ 0.53 miles) Sample ID: 450755 Sample Oates: 8/14/2017 -8/21/2017 Nuclide Activity 2 Sigma Error MDA Beta 2 27E-02 3 19E-03 3 25E-03 Sample ID: 451219 Sample Dates: 8/21/2017 -8128/2017 Nuclide Activity 2 Sigma Error MDA Beta 3 22E-02 3.66E-03 3.39E-03 Sample ID: 451562 Sample Dates: 8128/2017 -9/5/2017 Nucllda Activity 2 Sigma Error MDA Bela 1 71E-02 2.37E-03 2 45E-03 Sample ID: 452396 Sample Da1as: 9/512017

9111/2017 Nuclide Activity 2 Sigma Error MDA Bela 2 01E-02 3.47E-03 3.96E-03 Sample ID: 452815 Sample Dates: 9/11/2017

-9/18/2017 Nuclide Activity 2 Sigma Error MDA Beta 2 68E-0 2 3.56E-03 3.SSE-03 Sample ID: 452970 Sample Dates: 9/18/2017 -9/2512017 Nucllda Activity 2 Sigma Error MDA Bela 3 7 1E-02 3.89E-03 3.4 6 E-0 3 Sample ID: 454249 Sample Dates: 6/26/2017 -9/25/2017 Nucllde Activity 2 Sigma Error MDA Cs-134 <1 65E-03 O.OOE+OO 1.65E-03 Cs-137 c: 1.46E-03 O.OOE+OO 1.46E-0 3 Be-7 156E-01 3 74E-02 2.77E-02 K-40 <3 52E-02 O.OOE+OO 3.5 2E-02 Sample ID: 453474 Sample Dates: 9/25/2017 -10/2/2017 Nuclide Activity 2 Sigma Error MDA Beta 2 93E-02 3 51E-03 3 38E-03 Sample ID: 454243 Sample Dates: 101212017 -10/3/2017 Nucllde Activity 2 Sigma Error MDA Bela 1 63E-02 4 36E-03 6.73E-03 Sample ID: 455106 Sample Dales: 10/13/20 17 -1011412 017 Nuclide Activity 2 Sigma Error MOA Beta 1 02E-02 4 81E-03 7 83E-03 Sample ID: '455442 Sample Dales: 10116/2017 -10/23/2017 Nuclide Activity 2 Sigma Error MDA Bela 2 46E-02 2 92E-03 2.64 E-03 Sample ID: 456072 Sample Dates: 1012312017 -10/30/2017 Nucllde Activity 2 Sigma Error MDA Bela 1 30E-02 2.43E-03 2.88E-03 Sample ID: 461438 Sample Oates: 10/30/2017 -11/612017 Nuclide Activity 2 Sigma Error MDA Bela 2 77E-02 2.92E-03 2.46E-03 Sample ID: 461994 Sample Dates: 1116/2017 -11/13/2017 Nuclide Activity 2 Sigma Error MDA Beta 2.0SE-02 2.81E-03 2.89E-03 Sample ID: 462633 Sample Dates: 1111312017 -11/20/2017 Nuclide Activity 2 Sigma Error MDA Beta 2.99E-02 3.51E-03 3 19E-03 Sample ID: 463122 Sample Dates: 11/20/2017

1112712017 Nuclide Activity 2 Sigma Error MDA Beta 2.98E-02 3.46E-03 3.13E-03 Sample ID: 463532 Sample Dates: 11/27/2017

-12/4/2017 Nucllde Activity 2 Sigma Error MDA Bela 4.25E*02 3.94E-03 3.07E-03 Sample ID: 464173 Sample Dates: 121412017 -12111/2 017 Nuclide Activity 2 Sigma Error MDA Beta 2.81 E-02 3.38E-03 3.lOE-03 Sample ID: 464730 Sample Dates: 12111/2017 -12118/2017 Nuclide Activity 2 Sigma Error MDA Beta 2.32E*02 3.23E-03 3.38E-03 Sample 10: 464996 Sample Dates: 12118/2017 -12/26/2017 Nucllda Activity 2 S i gma Error MDA Beta 2.2 8E-02 2.97E-03 3.01E-03 Sample ID: '465653 Sample Dates: 9/25/2017 -1212612017 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.47E-03 0.00E+OO 1.47E-03 Cs-137 <1.56 E-03 0.00E+OO 1 56E-03 Be-7 1.25E*01 4.26E-02 5 21E-02 K-40 <4.45E-02 0.00E+OO 4 45E-02 SampletD: 465232 Sample Dates: 12126/2017 -1/2 12018 Nuclide Activity 2 Sigma Error MDA Beta 3.50 E-02 3.63E-03 3.04E-03 Cs-134 <1.52E-02 0.00E+OO 1.52E-02 Cs-137 <1.21E*02 0.00E+OO 1.21E-02 Be-7 1.67 E--0 1 1.11E-01 1.67E-01 K-40 <2.89E-01 0.00E+OO 2.89E-01 Report Generated@ 3/21/201814

30: 38 l i ID EnRad Laborator i es Appendix E -Page 6 of 93 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road HuntersviNe , North Carolina 28078 OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: AIR PARTICULATE Concentration (Act ivi ty): pCl/m3 Sample Point 079 ( INDICATOR

NE @ 0.56 miles] Sample 10: 431835 Sample Dates: 12/27/2018

-1/3/2017 Nuclide Activity 2 Sigma Error MDA Beta 1 OBE-02 2.42E-0 3 2 95E-03 Sample ID: 432242 Sample Dates: 1/3/2017

1/9/2017 Nuclide Activity 2 Sigma Error MDA Beta 2.14 E-02 3.70E-03 4.25E-03 Sample ID: 432936 Sample Dates: 1/9/2017
1/16 120 17 Nuclide Activity 2 Sigma Error MDA Beta 1 64E-02 3.03E*03 3.4 3E-03 Sample ID: 433332 Sample Dates: 1/1812017

-1/23/2017 Nuclide Activity 2 Sigma Error MDA Beta 1 B2E-02 2.74E*03 3.06E-03 Sample ID: 433751 Sample Oates: 1123/2017

1/30/2017 Nuclide Activity 2 Sigma Error MDA Beta 1 42E-02 2 51E-03 2 98E-03 Sample ID: 434491 Sample Dates: 1/30/2017
2/6/2017 Nuclide Activity 2 Sigma Error MDA Beta 2 47E-02 3 29E*03 3 3 1E-03 Sample ID: 435137 . Sample Dates: 2/6/2017
2/13/2017 Nuclide Activity 2 Sigma Error MOA Beta 2 10E-02 3 04E*03 3 OSE-03 Sample ID: 435838 Sample Dates; 2/13/2017

-2/20/2017 Nuclide Activity 2 Sigma Error MDA Beta 1.59E-02 2 62E-03 2 99E-0 3 Sample ID; 436290 Sample Dates: 2/20/2017

2/27/2017 Nuclide Activity 2 Sigma Error MDA Beta 2.23E-02 2 75E*03 2 67E-03 Sample ID: 436748 Sample Dates: 2127/2017
3/6/2017 Nuclide Act ivity 2 Sigma Error MDA Beta 2 25E-02 3 14E-03 3 OOE-03 Sample ID: 437617 Sample Oates: 3/6/2017
3/13/2017 Nuclide Activity 2 Sigma Error MDA Beta 1 79E-02 2.BSE-03 3.17E-03 Sample ID: 438330 Sample Dates: 3/13/2017

-3/20/2017 Nuclide Activity 2 Sigma Error MDA Beta 2 37E-02 3.0JE-03 3.20E-03 Sample ID; 438835 Sample Dates: 3/20/2017. 3/27/2017 Nuclide Activity 2 Sigma Error MDA Beta 2.SSE-02 2 91E-03 2.67E-03 Sample ID: 439217 Sample Dates: 12/27/2016

3/27/2017 Nuclide Activity 2 Sigma Error MDA Cs-134 <5.72E-04 O.OOE+OO 5 72E-04 Cs-137 <5.53E-04 O.OOE+OO 5 53E-04 Be-7 159E-01 2 50E-02 9 1 0E-03 K-40 <1.23E-02 O.OOE+OO 1 23E-02 Sample ID; 439211 Sample Dates: 3127/2017 -4/3/2017 Nuclide Activity 2 Sigma Error MDA Beta 1 55E-02 2 SOE-03 3 24E-03 Sample ID: 440039 Sample Dates; 4/312017 -4/10/2017 Nuclide Activity 2 Sigma Error MDA Bel li 1 66E-02 2.95E-03 3.36E-03 Sample ID: 440627 Sample Dates: 4/1012017
4117 (2017 Nuclide Activity 2 Sigma Error MDA Beta 2 64E-02 3.38E-03 3.35E-03 Sample ID: 441443 Sam pi. Dates: 41'17 1 2017 -4/24/2017 Nuclide Activity 2 Sigma Error MOA Beta 1 35E-02 2.67E-03 3.15E-03 Sample ID: 441892 Sample Oates: 4/24/2017
511 1 2017 Nuclide Activity 2 Sigma Error MDA Beta 1 55E-0 2 2 98E-03 3.62E-03 Sample ID: 442353 Sampi. Dates; 5/112017 -5/8/2017 Nuclide Activity 2 Sigma Error MDA Beta 1 76E-02 2 57E-03 2.SBE-03 Sample ID: 442898 Sample Dates: 5/812017 -5/15/2017 Nuclide Activity 2 Sigma Error MDA Beta 2.63E-02 3.33E-03 3 27E-03 Sample ID: 443336 Sample Dates: 5/15/2017.

5/22/2017 Nuclide Activity 2 Sigma Error MDA Beta 2 76E-02 3.00E-03 2 64E-03 Sample ID: 443888 Sample Dates: 5122/2017. 5130/2017 Nuclide Activity 2 Sigma Error MDA Beta 1 SOE-02 2.62E-03 2.99E-03 Sample ID; 444295 Sample Dates: 5/30/2017 -615/2017 Nuclide Activity 2 Sigma Er r or MDA Beta 2 77E-02 3.87E-03 4.05E-03 Report Generated@ 3/21/2018 14: 30: 38 c En ID EnRad laboratories Appendix E

Page 7 of 93 Duke Ene rgy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersv ill e North Carolina 28078 OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: AIR PARTICULATE Concentration (Activity):

pCl/m3 Sample Point 079 [ INDICATOR -NE @ 0.56 mlles ] Sample 10: 445357 Sample Oates: 6/5/2017

6/12/2017 Nuclide Activity 2 Sigma Error MOA Bala 1.66E-02 2.62E-03 2 96E-03 Sample ID: 446357 Sample Dates: 6/12/2017

-6/1912017 Nuclide Activity 2 Sigma Error MOA Beta 1.91E-02 2.63E-03 2 72E-03 Sample ID: 446855 Sample Dates: 6/19/2017 -8126/2017 Nucl i de Activity 2 Sigma Error MOA Beta 1.36E-02 2.83E-03 3 45E-0 3 Sample 10: 447229 Sample Dalee: 3/27/2017

6/26/2017 Nuclide Activity 2 Sigma Error MOA Cs-134 <7.59E-04 O.OOE+OO 7 59E 04 Cs-137 <3.71E-04 O.OOE+OO 3.71E-04 Be-7 1.48 E-01 2.36E-02 1.34E-02 K-40 1.94E-02 8.10E-03 6.4 3E 03 Sample ID: 447223 Sample Dales: 6/26/2017
713/2017 Nuclide Activity 2 Sigma Error MOA Beta 2.1 4E-02 2.78E-03 2.76E-03 Sample ID: 447839 Sample Dates: 713/2017
7/10/2017 Nuclide Activity 2 Sigma Error MOA Beta 1.86E-02 2.99E-03 3.24E-03 Sample ID: 448307 Sample Dates: 7/10/2017

-7117/2017 Nuclide Activity 2 Sigma Error MDA Beta 2.38E-02 3.21E-03 3 20E*03 Sample ID: 448923 Sample Date&: 7/1712017 -7/24/2017 Nuclide Activity 2 Sigma Error MDA Beta 3.12E-02 3.65E-03 3.47E-03 Sample ID: 449252 Sample Dates: 7/2412017

7/3112017 Nuclide Activity 2 Sigma Error MDA Bela 2.19E-02 3 19E-03 3.43E-03 Sample ID: 449972 Sample Dates: 7/31/2017

-8f7/2017 Nuclide Activity 2 Sigma Error MOA Beta 2.84E-02 3.13E-03 2 89E-03 Sample ID: 450239 Sample Dates: 8f7/2017

8/14/2017 Nuclide Activity 2 Sigma Error MDA Beta 1.67E-02 2.B2E-03 3 OGE-03 Sample 10: 450756 Sample Oates: 8/1412017

-8/2112017 Nuclide Activity 2 Sigma Error MDA Beta 2.52E-02 3.32E-03 3.26E-03 Sample ID: 451220 Sample Dates: 8/21/2017 -812812017 Nuclide Activity 2 Sigma Error MDA Bela 3.33E-02 3 72E-03 3.40E-03 Sample ID: 451563 Sample Dates: 8/2812017

915/2017 Nuclide Activity 2 Sigma Error MDA Beta 1.78E-02 2.40E-03 2 45E 03 Sample ID: 452397 Sample Oates: 9/512017 -911112017 Nuclide Activity 2 Sigma Error MOA Beta 2 35E-02 3 GOE-03 3.90E-03 Sample ID: 452816 Sample Oates: 9/11/2017
9/18/2017 Nuclide Activity 2 Sigma Error MOA Beta 2 51E-02 2 94E-03 2 7 5E-03 Sample ID: 452971 Sample Oates: 9/18/2017

-9/2512017 Nuclide Activity 2 Sigma Error MOA Beta 4 OSE-02 4 03E-03 3 49 E-03 Sample ID: 454250 Sample Oates: 6/2612017

9/2512017 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.32E-03 OOOE+OO 1 32E-03 Cs-137 <1 64E-03 OOOE+OO 1.64E-03 Be-7 1 78E-01 4.29E-02 3.72E-02 K-40 <3.28E-02 OOOE+OO 328E-02 Sample ID: 453475 Sample Oates: 9/2512017

-10/2/2017 Nuclide Activity 2 Sigma Error MDA Beta 3.26E-02 3.64E-03 3.36E-03 Sample ID: 454244 Sample Dates: 10/212017

10/912017 Nuclide Activity 2 Sigma Error MOA Beta 1 75E-02 3 04E-03 3 SBE-03 Sample ID: 455107 Sample Datu: 101912017.

10/1612017 Nuclide Activity 2 Sigma Error MDA Beta 1 75E-02 2 GOE-03 2 75E-0 3 Sample ID: 455443 Sample Dates: 10/16 12017 -10/23/2017 Nuclide Activity 2 Sigma Error MOA Beta 2 89E-02 3 02E-03 2 54E-03 Sample 10: 456073 Sample Datu: 10/23/2017 -10130/2017 Nuclide Activity 2 Sigma Error MDA Beta 1 80E-02 2 66E-03 2 86E 03 Report Generated@ 3/21/201814 " 30 38 c f!@ EnRad Laborator i es Appendix E -Page 8 of 93 Duke Energy Annua Report

Appendix E 13339 Hagers Ferry Road Huntersville. North Ca r olina 28078 OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: AIR PARTICULATE Concentration (Activity):

pCl/m3 Sample Point 079 ( INDICATOR -NE@ 0.56 mlles J Sample ID: 461439 Sample Dates: 10/30/2017 -11/6/2017 Sample ID: 461995 Sample Dates: 11/6/2017

11/13/2017 Sample ID: 462634 Sample Dates: 11/13/2017

-11/20/2017 Sample ID: 463123 Sample Datu: 11/20/2017 -11/27/2017 Sample ID: 463533 Sample Datea: 11/27/2017. 12/4/2017 Sample ID: ,&64174 Sample Oates: 12/4/2017 -12/11/2017 Sample ID: A64731 Sample Dates: 12/11/2017 -12/18/2017 Sample ID: 464997 Sample Oates: 12/18/2017

12/26/2017 Sample ID: 465654 Sample Oates: 9/25/2017

-12/26/2017 Sample ID: 465233 Sample Oates: 12/26/2017 -1/2/2018 Sample Point 081 (CONTROL* SE@ 9.33 miles J Sample 10: 431836 Sample Oates: 12/27/2016 -1/3/2017 Sample ID: 432243 Sample Oates: 1/3/2 017

1/9/2017 Sample ID: 432937 Sample Oates: 1/9/2017 -1/16/2017 Sample ID: 433333 Sample Oates: 1/16/2017

-1/23/2017 Sample ID: 433752 Sample Dates: 1/2312017

1/30/2017 Sample ID: 43"492 Sample Oates: 1/30/2017
2/6/2017 Sample 10: 435138 Sample Oates: 2/6/2017 -2/13/2017 Sample 10: 435839 Sample Oatea: 2/13/2017
2/20/2017 Sample 10: 436291 Sample Oates: 2/20/2017
2/27/2017 Sample ID: 436747 Sample Oates: 2/27/2017.

3/6/2017 Sample ID: 437618 Sample Dates: 3/6/2017 -3/13/2017 Sample ID: 438331 Sample Oates: 3/13/2017. 3/2012017 Report Generated@ 3/21/2018 1 4: 30: 38 Duke Energy Annual Report

Append i x E Nuclide Beta Nuclide Beta Nuclide Beta Nuclide Beta Nuclide Beta Nuclide Beta Nuclide Beta Nuclide Be ta Nuclide Cs-134 Cs-137 Be-7 K-40 Nuclide Beta Cs-134 Cs-137 Be-7 K-40 Nuclide Beta Nuclide Beta Nuclide Beta Nuclide Beta Nuclide Beta Nuclide Beta Nuclide Beta Nuclide Bela Nuclide Beta Nuclide Beta Nuclide Beta Nuclide Beta EnRad Laboratories 13339 Hagers Ferry Road Huntersville. North Carotma 28078 Activity 3 14E 0 2 Activity 2.48E*0 2 Activity 2 78E.0 2 Activity 3 51E.0 2 Activity 4.2 8E-02 Activity 3 54E-0 2 Activity 315E-02 Activity 2.SOE-0 2 Activity <1 38E-03 <1 13E-03 1.48E-0 1 <2.77E-02 Activity 3 78E-02 <151E02 <1 16E-0 2 1 06E*0 1 <2 OOE-0 1 Activity 1 58E-02 Activ i ty 1 88E-02 Activity 1 77E-02 Activity 1 60E-02 Activity 1.BBE-02 Activity 2 32E-02 Activity 2 71E-02 Activity 1 52E-02 Activity 2 31E-02 Activity 2.07E-02 Activity 1 56E-02 Activity 2 02E-02 2 Sigma Error MDA 3 07E*03 2 45E-03 2 Sigma Error MDA 3 OOE-03 2 90E-03 2 Sigma Error MOA 3 42E-03 3 21E-03 2 S i gma Error MOA 3 69E-03 3 13E-03 2 Sigma Error MCA 3.93E-03 3 06E-03 2 Sigma Error MDA 3.70E-03 3 11E-03 2 Sigma Error MDA 3.SOE-03 3.38E-0 3 2 Sigma Error MOA 3 19E 03 3.01E-03 2 Sigma Error MDA 0.00E+OO 1 38E-03 0.00E+OO 11 3E-0 3 3 74E-02 3 63E-02 0.00E+OO 2 77E-0 2 2 S igma Error MOA 3 73E-03 3 03E-03 O.OOE+OO 1 51E-02 O.OOE+O O 116E-02 9 98E-02 1 59E-01 0.00E+OO 2 OOE-01 2 Sigma Error MOA 2 71E.0 3 2 98 E-0 3 2 Sigma Error MOA 3.50E-03 4 14E-03 2 Sigma Error MOA 2.98E-03 3.42E-03 2 Sigma Error MDA 2 65E-03 3.07E-03 2 Sigma Error MDA 2 74E 03 3 OOE-03 2 Sigma Error MDA 3.21E-03 3 29E-03 2 Sigma Error MDA 3 35E-03 3 07E-03 2 Sigma Error MOA 2 57E-03 2 96E-03 2 Sigma Error MCA 2 82E 03 2 71E-03 2 Sigma Error MDA 2.99E-03 2 91E-03 2 Sigma Error MDA 2.78E-03 3.18E-03 2 Sigma Error MDA 2 90E-03 3.2JE-03 Append i x E
Page 9 of 93 OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: AIR PARTICULATE Concentration (Activity):

pCi/m3 Sample Point 081 [CONTROL* SE@ 9.33 miles] Sample 10: 438836 Sample Oates: 3/20/2 017 -3/27/2017 Nuclide Activity 2 Sigma Error MOA Beta 2.45E*02 2 67E-03 2.67E-03 Sample ID: 439218 Sample Dales: 12/27/2016. 3/27/2017 Nu clide Activity 2 Sigma Error MDA Cs-134 <4.6 3E-04 0.00E+OO 4.63E-04 Cs-137 <3.67E-04 O.OOE+OO 3.67E-04 Be-7 1.66£-01 2 48E-02 7.90E-03 K-40 <977E-03 O.OOE+OO 9.77E-03 Sample 10: 439212 Sample Oates: 3127/2017 -4/3/2017 Nuclide Activity 2 Sigma Error MOA Beta 1 71E-02 2 90E-0 3 3.27E-03 Sample ID: 440040 Sample Oates: 4/312017 -4/1012017 Nuclide Activity 2 Sigma Error MOA Beta 1 6 3 E-02 2.90E-03 3 31E-0 3 Sample ID: 440628 Sample Oates: 4/10/2017 -4/17/2017 Nuclide Activity 2 Sigma Error MDA Beta 2.50 -02 3.3~E-03 3.36E-03 Sample ID: 441444 Sample D atu: 4/17/2017 -4/24/2017 Nuclide Activity 2 Sigma Error MOA Beta 1.41 -02 2 70E-0 3 3.14E-03 Sample ID: 441893 Sample Oates: 4/2412017 -5/1/2017 Nuclide Activity 2 Sigma Error MOA Beta 1 1 D E-02 274E-03 3.62E-03 Sample ID: 442354 Sample Oates: 5/1/2017

5/8/2017 Nuclide Activity 2 Sigma Error MOA Beta 1.68E-02 2 SJE-03 2.68E-03 Sample ID: 442897 Sample Dates: 5/8/2017 -5/1512017 Nuclide Activity 2 Sigma Error MDA Beta 2.40E-02 3 23E-0 3 3.27E-0 3 Sample ID: 443337 Sample Oates: 5/15/2017
5/22/2017 Nuclide Activity 2 Sigma Error MDA Beta 2 ~SE-02 2 92E-03 2.63E-0 3 Sample ID: 443889 Sample Oates: 5/22/2017
5/30/2017 Nuclide Activity 2 Sigma Error MOA Beta 1 36E-02 2 54E*03 2 99E-03 Sample 10: 444296 Sample Oates: 5/30/2017

-6/5/2017 Nuclide Activity 2 Sigma Error MCA Beta 2 73E--02 3.86E-03 4 07E-03 Sampte ID: 445358 Sample Oates: 6/5/2017 -6/12/2017 Nuclide Activity 2 Sigma Error MDA Beta 1 64E-0 2 2.61E-03 2.95E--03 Sample tD: 446358 Sample Dates: 6/12/2017 -6/19/2017 Nuclide Activity 2 Sigma Error MDA Beta 1 99E-02 2 70E-03 2 7BE-03 Sample ID: 446856 Sample Dates: 6/19/2017

612612017 Nuclide Activity 2 Sigma Error MOA Beta 1 33E-0 2 2 77E-03 3.38E-03 Sample ID: 447230 Sample Dates: 3/27/2017

-6/26/2017 Nuclide Activity 2 Sigma Error MDA Cs-134 <565E-04 O.OOE+OO 5.65E-04 Cs-137 <4 46E-04 OOOE+OO 4.4 6E-04 B e-7 1 48E 0 1 2 2 4E-02 1 07E-02 K-4 0 631E-0 3 4 97E-03 6 32E-03 Sample ID: 447224 Sample Dates: 6/26/2017

7/3/2017 Nuclide Activity 2 Sigma Error MOA Beta 1 76E-0 2 2.60E-03 2 76E-03 Sample ID: 447840 Sample OatH: 7/3/2017 -7/10/2017 Nuclide Activity 2 Sigma Error MDA Beta 2 OSE-0 2 3.10E-03 3 25E-03 Sample 10: 448308 Sample Dates: 7/10/2017.

7/17/2017 Nuclide Activity 2 Sigma Error MDA Bet a 2 32E-0 2 3.1BE-03 3.20E-03 Sample ID: 448924 Sampi. Datu: 7/17/2017 -7/24/2017 Nuclide Activity 2 Sigma Error MOA Beta 3.11E-02 3.64E-03 3.46E-03 Sample ID: 449253 Sample Oates: 712412017. 7/31/2017 Nuclide Activity 2 Sigma Error MDA Beta 2 37E-02 3 27E-03 3.43E-03 Sample ID: 449973 Sample Oatea: 7/31/2017 -8/7/2017 Nuclide Activity 2 Sigma Error MDA Beta 2 28E-0 2 2.88E-03 2.66E-03 Sample ID: 450240 Sample Dates: Bn/2017 -8/14/2017 Nuclide Activity 2 Sigma Error MOA Beta 1 85E-0 2 2 92E-03 3 07E--03 Report Generated@ 3/21/2018 14.30.38 EnRad Laboratories Appendix E -Page 10 of 93 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersville North Carolina 28078 OCONEE Radiological Environmental Monitoring Analysis Report* i017 (Appendix E) Media Type: AIR PARTICULATE Concentration (Act i vity): pCilm3 Sample Point 081 (CONTROL* SE@ 9.33 miles] Sample ID: 450757 Sam pie Dates: 8/14/2017 -8/21/2017 Nuclide Act i v i ty 2 Sigma Error MDA B eta 2 SSE-0 2 J.3 1E-03 325E-03 Sample ID: 451221 Sample Dates: 8/21/2017 -8/28/2017 Nuclide Act i vity 2 Sigma Error MDA Be t a 3.00E-02 3.57E-03 3.38E-03 Sample ID: 451564 Sample Dates: 8/28/2017 -9/5/2017 Nuclide Activity 2 Sigma Error MDA Bet a 1 92E*0 2 2 47E-03 2.4 5E-03 Sample ID: 452398 Sample Dates: 9/5/2017 -9/11/2017 Nuclide Activity 2 Sigma Er r or MCA Bela 2 02E-0 2 J 49E-03 3.99E-0 3 Sample ID: 452817 Sample Dates: 9/11/2017

9/18/2017 Nuclide Activity 2 Sigma Error MDA B e t a 2 2 7E-0 2 2.84E-0 3 2 74E-0 3 Sampte I D: 452972 Sample Dates: 9/18/2017

-9125/2017 Nuclide Activity 2 Sigma Error MDA Beta 4 48E-02 4.1SE-03 3 45E*OJ Sample ID: 454251 Sample Dates: 6/26/2017 -9/25/2017 Nuclide Activity 2 Sigma Error MDA C s-134 <1 46E-OJ OOOE+OO 1.46E-OJ Cs-13 7 <1 JJE-03 OOOE+OO 1.J J E-0 3 B e-7 1.5 5 E-01 J.58E*02 2 OSE-02 K-4 0 <2 66E-02 O.OOE+O O 2.66E-0 2 Sample ID: 453476 Sample Dates: 9/25/2017 -10/2/2017 Nuclide Activity 2 Sigma Error MDA B e t a 3.43E-02 3 72E-03 3.39 E-03 Sample ID: 454245 Sample Dates: 10 1 212017 -10/9/2017 Nuclide Activity 2 Sigma Error MDA Beta 1.72E-02 3 01E-03 J.57E-0 3 Sample ID: 455108 Sample Dates: 10/9/2017 -10/16/2017 Nuclide Activity 2 Sigma Error MDA B e t a 1 63E-0 2 2 55E-03 2 76E-03 l Sample I D: 455444 Sample Dates: 10/16/2017

10/23/2017 Nuclide Activity 2 Sigma Error MDA Beta 3 10E-02 3.11E-03 2 53E-OJ Sample ID: 456074 Sample Dates: 10/23/2017

-10/30/2017 Nuclide Activity 2 Sigma Error MDA Bet a 1 47E-02 2.SOE-03 2.86E-03 Sample I D: 461440 Sample Dates: 10/30/2017 -11 1 6/2017 Nuclide Activity 2 Sigma Error MDA B e ta 2 88E-0 2 2 97E-03 2.46E-03 Sample ID: 461996 Sample Dates: 11/6/2017 -1111312017 Nuclide Activity 2 Sigma Error MDA Beta 2.49E-02 2.99E-03 2.88E-OJ Sample ID: 462635 Sample Dates: 11113/2017 -11/20/2017 Nuclide Activity 2 Sigma Error MDA Be t a 2.90E-02 3.46E-03 3.20E-03 Sample ID: 463124 Sample Dates: 11/20/2017 -11/2712017 Nuclide Activity 2 Sigma Erro r MDA Beta 3.58E-02 J.7 1 E-03 3 13E-0 3 Sample ID: 463534 Sample Dates: 11127/2017 -12/4/2017 Nuclide Activity 2 Sigma Erro r MDA Beta 4.03E-0 2 3.85E-03 3.07E-03 Sample ID: 464175 Sample Dates: 12/4/2017 -12/11/2017 Nucl i de Activity 2 Sigma Error MDA Beta 3.21E-02 J.57E-03 3.10E-03 Sample ID: 464732 Sample Dates: 12/11/2017 -12/18/2017 Nuclide Activity 2 Sigma Error MDA Beta 3.17E-02 3.60 E-03 3.37E-03 Sample I D: 464998 Sam pie Dates: 12/18/2017 -12/26/2017 Nuclide Activity 2 Sigma Error MDA Beta 2.71E-02 3.15E-03 3.02E-03 Sample ID: 465655 Sample Dates: 9/25/2017 -12/26/2017 Nuclide Activity 2 Sigma Error MDA C s*134 <9.70E-04 O.OOE+OO 9 70E-04 C s-137 <1.62E-03 O.OOE+OO 1 62E-03 Be-7 1.22E-01 3.SOE-02 3 70E-02 K-4 0 <2.61E-02 O.OOE+OO 2 61E-0 2 SamptelD: 465234 Sample Dates: 12/26/2017 -112/2018 Nuclide Activity 2 Sigma Error MDA Beta 3.0SE-02 344E-03 3.04E-03 Cs-134 <t.12E-0 2 O.OOE+OO 1 12E-02 C s-137 <8.33E-03 O.OOE+OO 8.33E-OJ Be-7 2.0JE-01 9*_41E-02 1.28E-0 1 K-40 1.49E-01 1.12E-01 1.59E-0 1 Report Generated@ 3/21/2018 14 30: 38 EnRad Labo r atories Append i x E -Page 11 of 93 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersv il le. North Carol i na 28078 OCONEE Radiological Environmental Monitoring Ana l ys i s Report -2017 (Appendix E) Media Type: AIR PART I CULATE Concentration (Act i v i ty): pCilm3 Sample Point 084 ( INDICATOR

NNE@ 2.58 miles) Sample ID: 4 3 1837 Sample Dates: 12127/2016

-1/3/2017 Nuclide Activ i ty 2 Sigma Erro r MDA Be ta 1.43E-02 2.S3E-03 2 97E-03 Sample ID; 432244 Sample Oates: 1/3/2017 -1/912017 Nuclide Activity 2 Sigma Erro r MDA B e ta 2 1 7E-02 3.S4 E-03 4 13E-03 Sample ID: 432938 Sample Date s; 11912017 -1/16/2017 Nuclide Activ i ty 2 S i gma E r ror MDA Be ta 1 56E-02 2.88E-03 3.43E-03 Sample ID: 433334 Sample Dates: 1/1612017 -1 1 2312017 Nuclide Activity 2 S i gma Erro r MDA B et a 1 S 3 E-02 2 S6E-03 3 06E-0 3 Sample ID: 433753 Sample Oate s: 1123/2017 -1130 1 2017 Nucl i de Activity 2 Sigma Erro r MDA Bet a 1 62E-02 2 S1E-03 2 99E-0 3 Sample ID: 434493 Sample D a te a; 1 1 30/2017 -216 1 2017 Nuclide Act i vity 2 Sigma Erro r MOA B et a 2 5 1 E-02 3.30E-03 3 JOE-03 Sample ID: 435139 Sample Oates; 21812017 -2113 1 2017 Nuclide A c tivity 2 S i gma E r ror MDA Beta 2.S4 E-0 2 3.3 1 E-03 3 0 7E-0 3 Sample ID: 435840 Sample Dates: 2/13/2017. 212012017 Nuclide Activity 2 Sigma Erro r MDA B e t a 1 5 9E-02 2.60E-0 3 2 S6E-0 3 S a mple ID: 436292 Sample Dates: 2120/2017 -2127/201 7 Nuclide Activity 2 Sigma Error MOA Bet a 2 1 4E-02 2 73E-03 2.7 0E-03 Sample ID: 436748 Sample D a tes: 21 27/2017 -3/6/2017 Nuclide Act i vity 2 S i gma Erro r MDA Be t a 2 59E-02 3 25E-03 2.92E-0 3 Sample ID: 437619 Sample Dates: 3/6/2017

3/13/2017 Nuclide Activity 2 S i gma Error MDA B e t a 1 88E-02 2 94E-03 3 18E-03 l Sample ID: 438332 Sample Dat es: 3/13/2017

-3/20 1 2017 Nuclide Activity 2 Sigma Error MDA Beta 1 93E-02 2 86E-0 3 3 2 4 E-03 Sample ID: 438837 Sample Dates: 3/2012017

3127/2017 Nuclide Activity 2 Sigma Error MDA B eta 2 2 S E-02 2 79E-03 2 65E*03 Sample ID: 439219 Sample Dates: 12127/2016

-3/27/2017 Nuclide Activity 2 S i gma Error MDA Cs-134 <6.21 E-04 O.OOE+OO 6.21E-04 C s-137 <2 76E*04 0.00E+OO 2 7 6E-04 Be-7 1 60 E-01 2 38 E-02 1 2 6 E-0 2 K-4 0 <1 55E-02 0 OOE+OO 1 55 E-0 2 Sample 10: 439213 Sample Oates: 3/2 7/2017

413 1 2017 Nucl i de Act i v i ty 2 S i gma Erro r MDA B eta 1 58 E-0 2 2 8 5 E-0 3 3 2 9 E-03 Sample ID: 440041 S a mple Oates: 4 1 3 1 2017 -4/10/2017 Nuclide Activity 2 Sigma Erro r MDA B e ta 169 E-0 2 2 93E-03 3 3 1 E-03 Sample ID: 440629 Sample Dat e s: 4/10/2017 -4/17/2017 Nuclide Activity 2 Sigma Erro r MDA Beta 2 46E-02 3.28E-03 3 34 E-0 3 Sample ID: 441445 Sample Datu: 4/17/2017

-4 1 2412017 Nuclide Activity 2 Sigma Error MOA B e t a 1 31 E-0 2 2.6 5E-03 3.1SE-0 3 Sample ID: 441894 Sample Dat es: 4124/2017 -51112017 Nuclid e Act i v i ty 2 Sigma Error MDA Be t a 1 71 E-02 3 OSE-03 3.6 1 E-0 3 S a mple 10: 442355 Sample Datu: 5/1/2017 -51812017 Nuclid e Activity 2 Sigma Error MDA B e t a 1 63E-0 2 2 5 1 E-0 3 2 68E-03 Sample ID: 442898 Sample Oates: 5/8/2017 -5/15/2017 Nuclide Activ i ty 2 Sigma Error MDA Be t a 2 66E-02 3 36E-03 3 2 7E-0 3 Sample ID: 443338 Sample Dates: 5/15/2017 -5122 1 2017 Nuclide Activity 2 Sigma Error MDA B e ta 3.05E-02 3.12E-03 2.S4E-0 3 Sample ID; 443890 Sample Oates: 5122/2017 -5/30 1 2017 Nuclide Activity 2 Sigma Erro r MDA Beta 1.46E-0 2 2 59E-03 2.96E-03 Sample ID: 444297 Sample Oates: 5 1 30/2017 -615 1 2017 Nuclide Activity 2 Sigma Error MDA Beta 2 74E-02 3.86E-03 4 OOE-0 3 Report Gene r a t ed @3/211 2 018 14: 30 38 c@]) EnRad Labo r a t o *e s Append ix E -Page 12 of 93 Duke Energy Annual Report

Append i x E 13339 Hagers Ferry Road Huntersvi~e. North Car rni na 28078 OCONEE Radiological Environmental Monitoring Analysis Report-2017 (Appendix E) Media Type: AIR PARTICULATE Concentration (Act ivity): pCi/m3 Sample Point 084 [ INDICATOR

-NNE @ 2.58 miles J Sample ID: 445359 Sample Dalee: 615/2017 -6/12/2017 Nuclide Activity 2 Sigma Error MOA Beta 1.70E-02 2.64E-03 2 95E-03 Sample 10: 446359 Sam pie Oates: 6/12/2017 -6/1912017 Nuclide Activity 2 Sigma Error MDA Beta 1.BBE-02 264E-03 2.76E-03 Sample ID: 446857 Sample Dates: 6/19/2017 -612612017 Nuclide Activity 2 Sigma Error MDA Beta 1.34E-02 2.82E-03 3.4SE-03 Sample 10: 447231 Sample Dain: 3/27/2017 -6/2612017 Nuclide Activity 2 Sigma Error MDA Cs-134 <5.09E-04 O.OOE+OO 5.09E-04 Cs-137 <4.49E-04 O.OOE+OO 4.49E-04 Be-7 1.40E-01 2 21E-02 1.21E-02 K-40 <1.42E-02 O.OOE+OO 1.42E-02 Sample ID: 447225 Sample Dates: 6/26/2017 -7/3/2017 Nuclide Activity 2 Sigma Error MDA Beta 2.24E-02 2 82E-03 2 76E-03 Sample ID: 447841 Sample Dates: 7/3/2017 -7/10/2017 Nuclide Activity 2 Sigma Error MDA Beta 1.98E-02 3.00E-03 3 25E-03 Sample ID: 448309 Sample Dates: 7/10/2017 -7/17/2017 Nuclide Activity 2 Sigma Error MDA Beta 2.51E-02 3.28E-03 3 21E-03 Sample ID: 448925 Sample Oates: 7/17/2017 -7/24/2017 Nuclide Activity 2 Sigma Error MDA Bela 3.SOE-02 3.78E-03 3.45E-03 Sample ID: 449254 Sample Dates: 7124/2017 -7/31/2017 Nuclide Activity 2 Sigma Error MDA Beta 2.50E-02 3.34E-03 3.43E-03 Sample ID: 449974 Sample Dates: 7/31/2017 -8/712017 Nuclide Activity 2 Sigma Error MDA Beta 2.70E-02 3.05E-03 2.86E-03 Sample ID: 450241 Sample Dates: 8/7/2017 -8/14/2017 Nuclide Activlly 2 Sigma Error MDA Beta 1.SOE-02 2 94E-03 3.07E-03 Sample ID: 450758 Sample Dates: 8/14/2017 -8/21/2017 Nuclide Activity 2 Sigma Error MDA Beta 2.40E-02 3 25E-03 3 24E-03 Sample ID: 451222 Sample Dates: 8/21/2017 -8/28/2017 Nuclide Activity 2 Sigma Error MDA Beta 3.68E-0 2 3.85E-03 3 39E-03 Sample ID: 451565 Sample Dates; 8/28/2017 -9/5/2017 Nuclide Activity 2 Sigma Error MDA Beta 1.87E*02 2 4 5 E-0 3 2 45E-03 Sample ID: 452399 Sample Oates: 9/5/2017 -9/1112017 Nuclide Activity 2 Sigma Error MDA Beta 2.41E-02 3 66E-03 3.96E-03 Sample 10: 452818 Sample Oates: 9/11/2017 -9 118/2017 Nuclide Activity 2 Sigma Error MDA Beta 2 78E-02 3.03E-03 2 72E-03 Sample ID: 452973 Sample Dates: 9/18/2017 -9/25/2017 Nuclide Activity 2 Sigma Error MDA Beta 4 56E*02 4 22E-03 3.49E-03 Sample ID: 454252 Sample Dates: 6/26/2017 -9/25/2017 Nuclide Activity 2 Sigma Error MDA Cs-134 <4 01E-04 O.OOE+OO 4 01E-04 Cs-137 <1.59E-03 O.OO E+OO 1 59E-03 Be-7 1 64E-01 4 62E-0 2 5 04E-02 K-40 <2.73E-02 0 OOE+OO 2 73E-02 Sample ID: 453477 Sample Dates: 9/25/2017 -10/2/2017 Nuclide Activity 2 Sigma Error MDA Beta 3.37E-02 3.7 0 E-03 3.39E-03 Sample ID: 454246 Sample Dates; 10/2/2017 -10/9/2017 Nuclide Activily 2 Sigma Error MDA Beta 1.45E-02 2.8 7 E-03 3.56E-03 Sample ID: 455109 Sample Dates: 10/9/2017 -10/16/2017 Nucllde Ac11vlly 2 Sigma Error MDA Beta 1 8SE-02 2~E-03 2.75E-03 Sample ID: 455445 Sample Dales: 10/16/2017 -10/23/2017 Nuclide Activity 2 Sigma Error MDA Beta 2 07E-02 2 67E-03 2.54E-03 Sample ID: 456075 Sample Dates; 10/2312017 -10/30/2017 Nuclide Activity 2 Sigma Error MOA Beta 1.41E-02 2 47E-03 2 86E-03 Report Generated@ 3/21/201814

30 38 c f!@ EnRad Laboratories Appendix E -Page 13 of 93 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersville , North Carolina 28078 OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: AIR PARTICULATE Concentration (Activity)

pCi/m3 Sample Point 084 [INDICATOR*

NNE@ 2.58 miles] Sample ID: 461441 Sample Dates: 10/30/2017

11/6/2017 Nuclide Activity 2 Sigma Error MOA Beta 2.68E-02 2B9E-03 2.46E-03 Sample ID: 461997 Sample Dates: 11/6/2017

-11/13/2017 Nuclide Activity 2 Sigma Error MDA Beta 1.94E-02 2. 75E-03 2 B9E-03 Sample ID: 462638 Sample Dates: 11/13/2017 -11/20/2017 Nuclide Activity 2 Sigma Error MDA Beta 2.29E-02 3 18E-03 319E-03 Sample ID: 463125 Sam pie Dates: 11/20/2017 -11/27/2017 Nuclide Activity 2 Sigma Error MOA Beta 2 57E-02 3 28E-03 3 13E-03 Sample ID: 463535 Sample Dates: 11/27/2017

12/4/2017 Nuclide Activity 2 Sigma Error MOA Beta 3 45E*02 3 62E-03 307E-03 Sample ID: 464178 Sample Oates: 12/4/2017
12/11/2017 Nuclide Activity 2 Sigma Error MDA Beta 2 86E-02 3 41E-03 3 10E-03 Sample ID: 464733 Sample Oates: 12/11/2017

-12/18/2017 Nuclide Activity 2 Sigma Error MDA Beta 2 52E-02 3.32E-03 3 37E-03 Sample 10: 484999 Sample Dates: 12/18/2017 -12/26/20 17 Nuclide Activity 2 S i gma Error MOA Beta 2.1 6E-02 2.92E-03 3.02E-03 Sample ID: 465656 Sample Dates: 9/25/2017

12/26/2017 Nuclide Activity 2 Sigma Error MDA Cs-134 <2 lOE-03 0.00E+OO 2 lOE-03 Cs-137 <1 62E-03 OOOE+OO 1.62E-03 Be-7 1 34E-01 3 38E-02 2 58E-02 K-40 <2.43E-02 O.OOE+OO 2.43E-02 Sample ID: 465235 Sample Dates: 12/2612017

-1/212018 Nuclide Activity 2 Sigma Error MDA Beta 3 09E-02 3 45E-03 3 04E-03 Cs-134 '<1 64E-02 0 OOE+OO 1 64E-02 Cs-137 <1 01E*02 0.00E+OO 101E*0 2 Be-7 101E-01 7 SBE-02 114E-01 K-40 3 36E-01 1 31E-01 109E-01 Sample Point 085 [INDICATOR* NNW@ 0.88 miles] Sample ID: 431838 Sample Dates: 12/27/2016

1/3/2017 Nuclide Activity 2 Sigma Error MDA Beta 1.SOE-02 2.67E-03 2 97E-03 Sample ID: 432245 Sample Oatea: 1/3/2017 -1/9/2017 Nuclide Activity 2 Sigma Error MOA Beta 2 25E-02 3.68E-03 4.14E-03 Sample ID: 432939 Sample Dates: 119/2017 -1/16/2017 Nuclide Activity 2 Sigma Error MDA Beta 1 93E-02 3.07E-03 3.43E-03 Sample ID: 433335 Sample Oates: 1/16/2017 -1/23/2 017 Nucllde Activity 2 Sigma Error MDA Beta 1 68E-02 2 68E-03 306E-03 Sample ID: 433754 Sample Dates: 1/23/2017

-1/30/2 017 Nuclide Activity 2 Sigma Error MOA Beta 1 74E-02 2 67E-03 2 99E-0 3 Sample ID: 434494 Sample Oates: 1/3012017

2/6/2017 Nuclide Activity 2 Sigma Error MDA Beta 2 90E-02 3.48E-03 3.30E-03 Sample ID: 435140 Sample Dates: 2/6/2017. 2/13/2017 Nuclide Activity 2 Sigma Error MDA Beta 2 38E-02 3 19 E-03 3.07E-03 Sample ID: 435841 Sample Dates: 2/13/2017
2/20/2017 Nuclide Activity 2 Sigma Error MDA Beta 1.93E-02 2 77E-03 2 98E-03 Sample ID: 436293 Sample Oates: 2/20/2017
2/27/2017 Nuclide Activity 2 Sigma Error MDA Beta 2 27E-02 2 78E-03 269E-03 SampleiO: 436749 Sample Dates: 2/27/2017
3/6/2017 Nuclide Activity 2 Sigma Error MOA Beta 2 84E-02 3 36E-03 2 93E-03 Sample ID: 437620 Sample Dates: 3/6/2017
311312017 Nuclide Activity 2 Sigma Error MDA Beta 1 91E-02 2.96E-03 3 18E-0 3 Sample ID: 438333 Sample DatH: 3/1312017.

3/2012017 Nuclide Activity 2 Sigma Error MDA Beta 2 34E-02 3.03E-03 3.22E-03 Report Generated@ 3/21/2018 1 4: 30: 38 EnRad Laboratones Append ix E -Page 14 ol 93 Duke Energy Ann al Report

Appendix E 13339 Hagers Ferry Road Huntersville. North Carolina 28078 OCONEE Radiological Environmental Monitoring Analysis Report* 2017 (Appendix E) Media Type: AIR PARTICULATE Concentration (Activity):

pCl/m3 Sample Point 085 [ INDICATOR -NNW@ 0.88 miles] Sample ID: 438838 Sample Dates: 3/20/2017 -3/27/2017 Nuclide Activity 2 Sigma Error MCA Beta 2.61E-02 3.01E*03 2 , 66E*03 Sample 10: 439220 Sample Oates: 12127/2016 -3/27/2017 Nuclide Activity 2 Sigma Error MOA Cs-134 <6.23E-04 OOOE+OO 6.23E-04 Cs-137 <3.50E-04 OOOE+OO 3.50E-04 Be-7 1.65E-01 2.63E-02 1 O OE-02 K-40 1 35E-02 6.85E-OJ 6 64E-03 Sample ID: 439214 Sample Dates: 3/27/2017. 41312017 Nuclide Activity 2 Sigma Error MCA Beta 1 71E-02 2 90E-OJ 3 28E*03 Sample ID: 440042 Sample Dates: 4/3/2017 -4/10/2017 Nuclide Activity 2 Sigma Error MDA Beta 2.07E-02 3 13E-0 3 3 32E-0 3 Sample ID: 440630 Sample Dates: 4/10/2017 -4117/2017 Nuclide Activity 2 Sigma Error MCA Beta 2 .. 94E-02 3.49E-03 3 34E-0 3 SamptelO: 441448 Sample Dates: 4/17/2017 -4124/2017 Nuclide Activity 2 Sigma Error MDA B8ta 1.35E-02 2.68E-03 317E-03 Sample ID: 441695 Sample Dates: 4/2412017 -511/2017 Nuclide Activity 2 Sigma Error MCA Beta 1 54E-02 2 97E-03 3 61E*03 Sample ID: 442356 Sample Dates: 511/2017 -5/8/2017 Nuclide Activity 2 Sigma Error MCA Beta 1 80E-02 2 59E.0 3 2.68E*03 Sample ID: 442899 Sample Dates: 518/2017 -5/15/2017 Nuclide Activity 2 Sigma Error MCA Beta 2.62E.02 3 34E.03 3.28E-0 3 Sample ID: 443339 Sample Dates: 5/15/2017 -5/22/2017 Nuclide Activity 2 Sigma Error MDA Beta 2.95E-02 3.08E-0 3 264E*03 Sample ID: 443891 Sample Dates: 5/22/2017

5/3012017 Nuclide Activity 2 Sigma Error MCA Beta 1.61E-02 2.67E-0 3 2 98E*03 Sample ID: 444298 Sample Dales: 5/30/2017
6/5/2017 Nuclide Activity 2 Sigma Error MCA Beta 3 03E-02 4.QOE-03 4 OOE-03 Sample ID: 445360 Sample Oates: 6/512017 -6112/2017 Nuclide Activity 2 Sigma Error MDA Beta 1 91E-02 2 74E-03 2 96E-03 Sample 10: 446360 Sample Dates: 6/12/2017

-6/19/2017 Nuclide Activity 2 Sigma Error MCA Beta 2 32E-02 2 64E-03 2 76E-03 Sample ID: 446858 Sample Oates: 6/19/2017 -6/2612017 Nuclide Activity 2 Sigma Error MCA Beta 1 44E-02 2 SSE-03 3.40E-03 Sample ID: 447232 Sample Dates: 3/27/2017

6/26/2017 Nuclide Activity 2 Sigma Error MCA Cs-134 <6.64E-04 O.OOE+OO 6.84E-04 C s, 137 <5.42E-04 OOOE+OO 5.42E-04 Be-7 1. 76E*01 2.66E-02 1 JOE-02 K-40 1 37E*02 7.57E-03 8.64E-03 Sample 10: 447226 Sample Dates: 6/2612017

-7/3/2017 Nuclide Activity 2 Sigma Error MOA Beta 2 35E-02 2 86E-03 2.76E-03 Sample ID: 447842 Sample Oates: 7/3/2017 -7/10/2017 Nuclide Activity 2 Sigma Error MCA Beta 1.SSE-02 2 86E-03 3 24E-03 Sample ID: 448310 Sample Dates: 7110/2017 -7/1712017 Nuclide Activity 2 Sigma Error MDA Beta 2 2 4E-02 316E-03 3 22E-0 3 Sample ID: 448926 Sample Dates: 7/17/2017. 7/24/2017 Nuclide Activity 2 Sigma Error MCA Beta 3 54E-02 3 79E-03 3.45E-03 Sample 10: 449255 Sample Oates: 7/2412017 -7/31/2017 Nuclide Activity 2 Sigma Error MDA Bela 2 48E-02 3 32E-03 3.43E-03 Sample ID: 449975 Sample Dales: 7/31/2017

8f7/2017 Nuclide Activity 2 Sigma Error MCA Beta 2.69E-02 3.05E*03 2 86E-0 3 Sample 10: 450242 Sample Oates: 8/712017
8114/2017 Nuclide Activity 2 Sigma Error MDA Bela 2.04E-02 3.01E-03 3 06E-03 Report Generated@

3/21/2018 14: 30.38 EnRad Laboratories Appendix E -Page 1 5 of 93 Duke Energy Annual Report

Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078 OCONEE Radiological Environmental Monitoring Analysis Report
2017 (Appendix E) Media Type: AIR PARTICULATE Concentration (Activity)

pCi/m3 Sample Point 085 [ INDICATOR

-NNW @ 0.88 miles ] Sample ID: 450759 Sample Dates: 8114/2017 -812112017 Nuclide Activity 2 Sigma Error MDA Bela 2 331:*02 3.22E-03 3.25E-03 Sample ID: 451223 Sample Dates: 812112017

8/2812017 Nuclide Activity 2 Sigma Error MDA Beta 2 9Z *02 3 54E-03 3 39E-03 Sample ID: 451566 Sample Dales: 8128/2017

-91512017 Nuclide Activity 2 Sigma Error MDA Beta 1 85E-02 2.44E-03 2 45E-03 Sample 10: 452400 Sample Oates: 91512017 -9111/2017 Nuclide Activity 2 Sigma Error MDA Beta 1 92E-02 3.42E-03 396E-03 Sample ID: 452819 Sample Dates: 911112017 -9/18/2017 Nuclide Activity 2 Sigma Error MDA Bela 2.71E-02 3 10E-03 2 86E-0 3 Sample ID: 452974 Sample Dates: 9/1812017 -9/25/2017 Nuclide Activity 2 Sigma Error MDA Beta 3.95E-02 4 OOE-03 349E-03 Sample ID: 454253 sample Oates: 612612017 -9/2512017 Nuclide Activity* 2 Sigma Error MOA Cs-134 <1 40E-03 0 OOE+OO 1 40E-03 Cs-137 <1 , 77E-03 0 OOE+OO 1 77E-03 Be-7 1.59E-01 3.73E-02 2 74E-02 K-40 <3 14E-02 0 OOE+OO 3.14E-02 Sample ID: 453478 Sample Dates: 9/25/2017 -10/212017 Nuclide Activity 2 Sigma Error MDA Bela 3.43E-02 3 72E-03 3.38E-03 Sample ID: 454247 Sample Dates: 101212017 -1019/2017 Nuclide Activity 2 Sigma Error MDA Bela 1 49E-02 2.91E-03 3.58E-03 Sampkl ID: 455110 Sample Dates: 10/912017 -10/1612017 Nuclide Activity 2 Sigma Error MOA Beta 1 69E-02 2.SSE-03 2 72E-0 3 Sample ID: 455446 Sample Dates: 1011612017 -10/2312017 Nuclide Activity 2 Sigma Error MDA Beta 2 59E-02 2 93E-0 3 2 57E-03 Sample ID: 456076 Sample Dates: 10123/2017 -10/30/2017 Nuclide Activity 2 Sigma Error MDA Beta 1 69E-02 2 61E-0 3 2 66E-03 Sample ID: 461442 Sample Dates; 10130/2017

11/6/2017 Nuclide Activity 2 Sigma Error MDA Beta 3.34E-02 3 16E-03 2 46E-03 Sample ID: 461998 Sample Dates: 11/612017

-11/13/2017 Nuclide Activity 2 Sigma Error MDA Beta 2.41E-02 2.96E-03 2 69E-03 Sample ID: 462637 Sample Dates: 11/13/2017

11/2012017 Nuclide Activity 2 Sigma Error MDA Beta 3.44E-02 3.69E-03 3.20E-03 Sample ID: 463126 Sample Dates: 11/20/2017

-11/27/2017 Nuclide Activity 2 Sigma Error MDA Beta 3.44E-02 3.65E-03 3.13E-03 Sample ID: 463536 Sample Dates: 11/27/2017 -12/4/2017 Nuclide Activity 2 Sigma Error MOA Bela 4 12E-02 3.86E-03 3.07E-03 Sample ID: 464177 Sample Dates; 12/4/2017 -12/1112017 Nuclide Activity 2 Sigma Error MDA Beta 3 35E-02 3.62E-03 3 10E-03 SamptelD: 464734 Sample Dates; 12/1112017 -12/18/2017 Nuclide Activity 2 Sigma Error MOA Bela 2.55E-02 3 34E-03 3 39E-03 Sample ID: 465000 Sample Dates: 12/18/2017 -12/2612017 Nuclide Activity 2 Sigma Error MDA Beta 2 39E-02 3 02E-03 3 01E-03 Sample ID: 465657 Sample Oates: 912512017. 12/28/2017 Nuclide Activity 2 Sigma Error MOA Cs-134 <1 71E-03 0 OOE+OO 1 71E*03 Cs-137 <1.51E-03 OOOE+OO 1 51E*03 Be-7 1 65E-01 3.59E-02 2.31E-02 K-40 <2.41E-02 0 OOE+OO 2 41E-02 Sample ID: 465236 Sample Dates: 12/26/2017 -1/2/2018 Nuclide Activity 2 Sigma Error MDA Bela 3 63E-02 3.68E-03 3.04E-03 Cs-134 <1 06E-02 0.00E+OO 1.06E-02 Cs-137 <1 02E-02 O.OOE+OO 1 02E-02 B e-7 6 91E-02 7.92E*02 1.241:-01 K-40 <1 92E-01 O.OOc+OO 1 92E-01 Report Generated@ 3121/2018 14: 30:38 c m@ EnRad Laboratories Appendix E

Page 16 of 93 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078 OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: AIR RADIOIODINE Concentration (Activity)

pCi/m3 Sample Point 077 [ INDICATOR

SW@ 1 miles ] Sample ID: 431845 Sample Dates: 12/27/2016

-1/3/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <9.50E--0 3 O.OOE+OO 9.50E-0 3 Cs-134 <7.SOE-03 O.OO E+OO 7 60E-03 C s-137 <8.77 E-03 O.OOE+OO 8 77E-03 B e-7 <4.0SE-0 2 O.OO E+OO 4.06E-0 2 K-40 3.72E-01 1 3 3E-01 3 OSE-0 2 Sample ID: 432246 Sample Dates: 1/3/2017 -1/9/2017 Nuclide Activity 2 Sigma Error MOA 1-1 31 <9.75E-03 O.OOE+OO 9 75E-03 Cs-134 <7.13E-0 3 0.00 E+OO 7 1 3 E-0 3 Cs-137 <7.95E-03 O.OOE+OO 7 95E-0 3 Be-7 <7.07E-0 2 O.OOE+OO 7 07E-02 K-40 4.61E-01 1.56E-01 3 37E-0 2 Sample ID: 432940 Sample Dates: 1/9/2017 -1/16/2017 Nuclide Activity 2 Sigma Error MDA 1-1 3 1 <8.49E-03 0 OOE+OO 8 49E-0 3 Cs-1~ <9.34E-03 0 OOE+OO 9 34E-0 3 Cs-137 <9 , 45E-03 0 OOE+OO 9451:-03 Be-7 <5.SO E-02 0 OO E+OO 5 SOE-02 K-40 3.48E-01 1 23 E-01 2 77E-02 Sample ID: 433336 Sample Dates: 1/16/2017 -1/23/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <9.59E-03 0 OOE+OO 9 , 59E 03 Cs-134 <4.68E-0 3 O.OOE+OO 4.68E-03 Cs-137 <6.75E-03 O.OOE+OO 6 75E-03 Be-7 <5.6 7 E-02 O.OOE+OO 5.6 7 E 0 2 K-40 5 71E*01 162E-01 2.86E-0 2 Sample ID: 433755 Sample Dates: 1/2312017

1/30/2017 Nuclide Activity 2 Sigma Error MDA 1-1 3 1 <6.45E-03 O.OOE+OO 6.45E-03 Cs-134 <7.56E-03 O.OOE+OO 7 56E*0 3 Cs-137 <7.76E-03 O.OO E+OO 7.76E-03 Be-7 <7.02E-02 O.OOE+OO 7 02E-02 K-40 2.17E-01 116E-01 1 35E*0 1 Sample ID: 434495 Sample Dates: 1/3012017

-216/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <1.0SE--02 0 OOE+OO 1 OSE-02 Cs-134 <7.59 E-03 0 OOE+OO 7 59E*0 3 Cs-137 <8.77E-03 OOOE+OO 8 77E-0 3 Be-7 <5.65E-02 0.00 E+OO 5.65E-02 K-4 0 4 79E-01 1.68E-01 1.47E-0 1 Sample ID: 435141 Sample Dates: 2/6/2017

2/13/2017 Nuclide Activity 2 Sigma Error MOA 1-131 <6 76E-03 O.OO E+OO 6.76E-0 3 C s-134 <6 78E-0 3 O.O O E+OO 6.78E-03 Cs-1 3 7 <7 8 3 E-03 0 OOE+OO 7.83E-03 Be-7 <6.13E-02 O.OOE+OO 6.13E-02 K-40 369E-01 1.2 8E-01 2.78E-02 Sample ID: 435842 Sample Oates: 2113/2017

-2/2012017 Nuclide Activity 2 Sigma Error MDA 1-1 3 1 <1 07E-02 O.OOE+OO 1.07E-02 Cs-134 <8 29E-03 O.OOE+OO 8.29E-03 C s-137 <1 33E-02 O.OOE+OO 1.33E-02 B e-7 <6.25E-0 2 O.OOE+OO 6.25E--0 2 K-40 <2.26E-01 O.OOE+OO 2.26E-01 sample ID: 436294 Sample Dates: 212012017

2127/2017 Nuclide Activity 2 Sigma Error MOA 1-131 <1.19 E*0 2 O.OOE+OO 1. t9E-02 Cs-1 34 <6.BSE-03 0 OOE+OO 6.BSE-03 C s-137 <5.61E-03 O.OOE+OO 5.6 1 E-03 Be-7 <5 OBE-02 O.OOE+OO 5.0SE-02 K-4 0 <2.2 3E-01 O.OOE+OO 2.23E-01 Sample 10: 436750 Sample Oates: 2127/2017

-316/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <8.43E-03 O.OOE+OO 8.43E-03 Cs-134 <6.11E-03 O.OOE+OO 6.11E-03 Cs*137 <1.00E-02 O.OOE+OO 1.00E-02 Be-7 <5.78E--02 O.OOE+OO 5.78E-02 K-40 2.17E-01 9.91E-02 2.94E-02 Report Generated@ 3/21/2018 14 30.38 <E ll[) EnRad Laboratories Appendix E -Page 17 of 93 Duke Energy Annual Report

Appendix E 13339 Hagers Ferry Road Huntersville. North Carolina 28078 OCONEE Radiological Environmental Monitoring Analysis Report* 2017 (Appendix E) Media Type: AIR RADIOIODINE Concentration (Activity)

pCi/m3 Sample Point 077 [ INDICATOR

-SW@ 1 miles] Sample ID: 437621 Sample Dates: 3/6/2017 -3/1312017 Nuclide Activity 2 Sigma Error MDA 1-131 <6 7 3 E-03 O.OOE+OO 6.73E-03 Cs-134 <6.24E-03 O.OOE+OO 6.24E-03 Cs-137 <1.03E-02 O.OOE+OO 1.03E-02 Be-7 <6.0BE-02 O.OOE+OO 6.0BE-02 K-40 2 , 23E-01 9 74E-02 2 75E-02 Sample ID: 438334 Sample Dates: 3/13/2017 -3/20/2017 Nuclide Activ i ty 2 Sigma Error MDA 1-131 <119E-0 2 O.OOE+OO 1 19E-02 Cs-134 <7 65E-03 O.OOE+OO 7.65E-03 Cs-137 <1 OOE-02 O.OOE+OO 1.00E-02 Be-7 <6.53E-02 O.OOE+OO 6 53E-02 K-40 2 58E-0 1 1 2 1E-01 1.21E-01 Sample ID: 438839 Sample Dates: 3/20/2017 -3127/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <7 15E-03 OOOE+OO 71 5 E-0 3 Cs-134 <7 06E-03 0 OOE+OO 7 06E-03 Cs-137 <1 06E-02 0 OOE+OO 1 06 E-02 Be-7 <5 24E-02 0 OOE+OO 5 24E-02 K-40 1 58 E-01 6.53E-0 2 3 OSE-02 Sample ID: 439221 Sample Dates: 3/27/2017 -4/3/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <110E-02 OOOE+OO 110E-02 Cs-134 <7 62E-03 OOOE+OO 7 62E-03 Cs-13 7 <9 46E-03 O O OE+OO 9 46E-03 B e-7 <5.72E-0 2 O.OOE+OO 5.72E-0 2 K-40 2 17E-01 1.13E-01 1.17E-01 Sample ID: 440043 Sample Dates: 4/3/2017 -4/10/2017 Nucllde Activity 2 Sigma Error MDA 1-131 <6 96E-03 O.OOE+OO 8.96E-03 Cs-134 <6.BOE-03 O.OOE+OO 6.BOE-03 Cs-137 <1 04E-02 O.OO E+OO 1.04E-02 Be-7 <5.47E-02 O.OOE+OO 5.47E-02 K-40 <2.07E-01 0.00E+OO 2.07E-01 Sample ID: 440631 Sample Dates: 4/10/2017 -4/17/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <7 10E-03 0 OOE+OO 7.10E-03 Cs-134 <1 03E-02 0 OOE+OO 1.03E-02 Cs-137 <7.65E-03 0 OOE+OO 7 65E-03 Be-7 <3.01E-02 0 OOE+OO 3 01E-02 K-40 5.BBE-01 184E-01 1 54E-01 Sample ID: 441447 Sample Dates: 4/17/2017 -4/24/2017 Nucllde Activity 2 Sigma Error MDA 1-131 <7.47E-03 0.00E+OO 7 47E-03 Cs-134 <8.53E-0 3 0.00E+OO 8 53E-03 Cs , 1 3 7 <7.18E-03 O.OOE+OO 7 18E-03 Be-7 <5.18E-02 O.OOE+OO 5 18E-02 K-4 0 2.89E-01 1.43E-01 1.66E-01 Sample ID: 441896 Sample Dates: 412412017 -5/1/2017 Nucllde Activity 2 Sigma Error MDA 1.13; <7.74E-03 O.OOE+OO 7.74E-03 Cs-134 <8.37E-03 O.OOE+OO 6.37E-03 Cs-137 <6.43E-03 OOOE+OO 6.43E-03 Be-7 <4.81E-02 O.OOE+OO 4.81E-0 2 K-4 0 4.39E-01 162E-01 1.43E-01 Sample ID: 442357 Sample Dates: 5/112017. 51812017 Nuclide Activity 2 Sigma Error MDA 1-1 3 1 <8.1 1 E-03 0 OOE+OO B 11E-03 Cs-134 <3.67E-03 0 OOE+OO. 3 67E--03 C s-137 <6.68E-03 0 OOE+OO 668E-03 Be-7 <6.94E-02 0 OOE+OO 694E-02 K-4 0 3 23E-0 1 1 31E-01 119E-01 Sample ID: 442900 Sample Dates: 51812017 -5/15/2017 Nuclide Activity 2 Sigma Error MDA 1-13 1 <7.95E--03 O.OOE+OO 7 95E-03 Cs-134 <7.20E-03 O.OOE+OO 7.20E-03 Cs-1 3 7 <6.40E-03 O.OOE+OO 6.40E-03 Be-7 <6.20E-02 O.OOE+OO 6.20E-02 K-40 3.87E-01 1 48E-01 1.44E-01 Report Generated@ 3/21/2018 14 30: 38 c@ EnRad Laboratories Appendix E -Page 18 of 93 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersville , North Carolina 28078 OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: AIR RADIOIODINE Concentration (Activity)

pCl/m3 Sample Point 077 [INDICATOR*

SW@ 1 miles J Sample ID: 443340 Sample Dates: 5/1512017 -6/22/2017 Nuclide Activity 2 Sigma Error MDA 1-13 1 <8.55E-03 O.OOE+OO 8 55E-03 C s-134 <5.37E-03 O.OOE+OO 5 37E-0 3 Cs-137 <4.56E-03 O.OOE+OO 4 56E-03 Be-7 <4.32E-02 O.OOE+OO 4 32E-02 K-40 3.59E-01 1.43 E-01 1 39E-0 1 Sample ID: 443892 Sample Dales: 5/22/2017 -5/30/2017 Nuclide Activ i ty 2 Sigma Error MDA 1-13 1 <7 , 95E-03 O.OOE+OO 7 95E-03 Cs-134 <3.26E-03 O.OOE+OO 3 26E-03 Cs-137 <7 21E-03 O.OOE+OO 7 21E-0 3 Be-7 <5 39E-02 O.OOE+OO 5 39E-02 K-40 266E-01 11 6 E-01 116E-0 1 Sample ID: 444299 Sample Oates: 5130/2017 -6/5/2017 Nuclide Activity 2 Sigma Error MDA 1-1 31 <8.40E-0 3 O.OOE+OO 8 40E-0 3 Cs-1 34 <!) 67E-03 O.OOE+OO 967E-0 3 Cs-137 <6 67E-03 0.00E+OO 8.67E-0 3 Be-7 <6 04E-0 2 0 OOE+OO 6.04E-0 2 K-40 <2 5 2 E-01 0 OOE+OO 2.53E-0 1 Sample ID: 445361 Sample Dates: 6/5/2017. 6/12/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <6.16E-03 0 OOE+OO 6 16E-0 3 Cs-134 <5.41E-0 3 0 OOE+OO 5.41E-0 3 Cs-137 <6.73E-0 3 O.OOE+OO 6.73E-0 3 Be-7 <5.SSE-02 0 OOE+OO 5.65E-02 K-4 0 <1.99E-0 1 O.OOE+OO 1 99E-0 1 Sample ID: 446361 Sample Dates: 6/12/2017 -6/1912017 Nuclide Activity 2 Sigma Error MDA 1-13 1 <6.46E-03 O.OOE+OO 6.4SE-0 3 Cs-134 <6.68E-03 O.OOE+OO 6 68E-03 Cs-137 <7 71E-03 O.OOE+OO 7 71E-03 Be-7 <5 79E-02 0.00E+OO 5 79E-02 K-40 <2.38E-01 O.OOE+OO 2 38E-01 Sample ID: 446859 Sample Dates: 6/1912017. 6/26/2017 Nucl i de Activity 2 Sigma Error MDA 1-131 <7.67E-03 O.OOE+OO 7 67E-0 3 Cs-134 <6 10E-03 O.OOE+OO 6.10E-0 3 Cs-13 7 <5 87E-03 O.OOE+OO 5.87E-03 Be-7 <6 44E-02 0 OOE+OO 6.44E 02 K-40 2 02E-01 9.43E-02 2.88E-02 Sample ID: 447233 Sample Dates: 6126/2017 -7/3/2017 Nuclide Activity 2 Sigma Error MDA 1-13 1 <1 03E-02 0 OOE+OO 1.03E-0 2 Cs-134 <7 03E-0 3 0 OOE+OO 7 OJE , 03 Cs-137 <8 12E-03 0 OOE+OO 8.12E-03 Be-7 <6.04E-02 0 OOE+OO 6 04E-0 2 K-40 <1.97E-01 0 OOE+OO 197E-01 Sample ID: 447843 Sample Dates: 7/312017

7/10/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <7 , 43E-03 O.OOE+OO 7 43E-0 3 Cs-134 <4 97E-03 O.OOE+OO 4 97E-03 Cs-1 3 7 <7.99E-0 3 O.OOE+OO 7 99E-03 Be-7 <5 62E-02 0.00E+OO 562E-02 K-40 2 02E-01 115E-0 1 1 32E*01 Sample ID: 448311 Sample Dates: 7/10/2017
7/17/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <6 53E-03 0 OOE+OO 6 53E-0 3 Cs-134 <6 34E-03 O.OOE+OO 6 34E-03 Cs-13 7 <1 04E-0 2 0 OOE+OO 1 04E-02 Be-7 <3 96E-0 2 0 OOE+OO 396E*02 K-40 <2 48E-01 0 OOE+OO 2.48E-01 Sample ID: 448927 Sample Dates: 7117/2017

-7/2412017 Nuclide Activity 2 Sigma Error MDA 1-1 31 <7 71E-03 0 OOE+OO 77 1 E-03 Cs-134 <5.14E-03 O.OOE+OO 5 14 E-03 Cs-137 <9 70E-03 O.OOE+OO 9 70E-03 Se-7 <8.0SE-02 0.00E+OO 8 06E-02 K-40 <2.34E-01 O.OOE+OO 2 34E-0 1 Report Generated@ 3/21/2018 14: 30'38 <f!ID EnRad Laborato ri es Append i x E -Page 19 of 93 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Hun1ersville , North Carolina 28078 OCONEE Radiological Environmental Monitoring Analysis**Report. 2017 (Appendix E) Media Type: AIR RADIOIODINE Concentration (Activlty): pCl/mJ Sample Point 077 [ INDICATOR -SW@ 1 miles ) Sample ID: 449256 Sample Dates: 712412017 -7/31/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <8.83E-03 0 OOE+OO 8.83E-03 Cs-134 <8.19E-03 O.OOE+OO 8 19E-03 Cs-137 <8.12E-03 0.00E+OO 8 12E-03 Be-7 <4.10E-02 0 OOE+OO 4 10E-02 K-40 9.48E-02 112E-01 1 SOE-01 Sample ID: 449976 Sample Dates: 7/31/2017 -817/2017 Nuclide Activity 2 Sigma Error MOA 1-13 1 <7.65E-03 0.00E+OO 7.65E-03 Cs-134 <6 22E-03 O.OOE+OO 8.22E-03 Cs-137 <1 13E-02 OOOE+OO 1.13E-02 Be-7 <4 08E-02 O.OOE+OO 4.08E-02 K-40 <2 16E-01 O.OOE+OO 2.16E-01 Sample ID: 450243 Sample Dates: 817/2017 -8/14/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <8 56E-03 O.OOE+OO 8.56E-03 Cs-134 <6 97E-03 O.OOE+09 6.97E-03 Cs-137 <9 75E-03 O.OOE+OO 9.75E-03 B e-7 <5.62E-02 OOOE+OO 5.62E-02 K-40 <1.88E-01 OOOE+OO 1 88E-01 Sample ID: 450760 Sample Dates: 8/14/2 017 -8/21/2017 Nuclide Activity 2 S igma Error MDA 1-131 <6.91E-03 0 OOE+OO 6.91E-03 Cs-134 <9.68E-03 0 OOE+OO 9.6BE-03 Cs-13 7 <1.09E-02 0 OOE+OO 1 09E-02 Be-7 <6.29E-02 0 OOE+OO 6.29E-02 K-40 1 61E-01 1 03E-01 1 20E-01 Sample ID: 451224 Sample Dates: 8/21/2017

8/28/2017 Nuclide Act i vity 2 Sigma Error MDA 1-131 <5 26E-03 O.OOE+OO 5 26E-03 Cs-134 <7 93E-03 O.OOE+OO 7 93E-03 Cs-137 <9 34E-03 0.00E+OO 9 34E-03 Be-7 <4 79E-02 O.OOE+OO 4 79E-02 K-40 <2 JOE-01 O.OOE+OO 2 30E-01 Sample ID: 451567 Sample Dates: 8/28/2017
9/5/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <8.51E-03 O.OOE+OO 8.51E-03 Cs-134 <4.37E-03 0 OOE+OO 4 37E-03 Cs-137 <9.27E-03 0 OOE+OO 9.27E-03 B e-7 <6.31E-02 0 OOE+<lO 6.31E-02 K-40 <2.46E-01 OOOE+OO 2.46E-0 1 Sample ID: 452401 Sample Dates: 915/2017 -9/11/2017 Nuclide Activity 2 S i gma Error MDA 1-131 <1.16E-02 0 OOE+OO 1 16E-02 Cs-134 <8.66E-03 O.OOE+OO 8 66E-03 Cs-137 <1.43E-02 0.00E+OO 1 43E-02 Be-7 <4.39E-02 O.OOE+OO 4 39E-02 K-40 <3 20E-01 O.OOE+OO 3 20E-01 Sample ID: 452820 Sample Dates: 9/1112017. 9118/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <1 41E-02 O.OOE+OO 141E-02 Cs-134 <1 22E-02 O.OOE+OO 1.22E-02 Cs-137 <1 23E-02 0 OOE+OO 1 23E-02 Be-7 <6.04E-02 0.00E+OO 6.04E-02 K-40 1 76E-0 1 1 0 3E-01 3.97E-02 Sample ID: 452975 Sample Oates: 9/18/2017 -9/25/2017 Nuclide Activity 2 Sigma Error MOA 1-131 <8 10E-03 OOOE+OO 6. lOE-03 Cs-134 <1 12E-02 0 OOE+OO 112E-02 Cs-137 <1.26E-02 0 OOE+OO 1 26E 02 Be-7 <6.45E-02 0 OOE+OO 6.45E-02 K-40 1.61E-01 1 OSE-01 1 28E-01 Sample ID: 453479 Sample DatH: 9/2512017

-10/2/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <1 90E-02 O.OOE+OO 1 90E-02 Cs-134 <1 29E-02 O.OOE+OO 1 29E-02 Cs-137 <1 38E-02 O.OOE+O O 1 38E-02 Be-7 <1 08E-01 O.OOE+OO 1 OBE-01 K-40 <2.54E-01 O.OOE+OO 2.54E-01 Report Generated@ 3/21/2018 14:30: 38 c f!@ EnRad Laboratories Appendix E

Page 20 of 93 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersville , North Carolina 28078 OCONEE Radiological Environmental Monitoring Analysis Report* 2017 (Appendix E) Media Type: AIR RADIOIODINE Concentration (Activity)

pCi/m3 Sample Point 077 (INDICATOR

SW@ 1 miles J Sample ID: 454254 Sample Dates: 1012/2017

-10/9/2 017 Nuc lide Act i vity 2 Sigma Error MDA 1-1 31 <1.90E-02 O.OOE+OO 1 90E-02 Cs-134 <1 , 01E-02 0 OOE+OO 1 01E-02 Cs-137 <1.36E-0 2 0 OOE+OO 1 36E-02 Be-7 <1.0SE-01 OOOE+OO 1 OSE-01 K-40 1.61E-01 1.22E-01 1 71E-01 Sample ID: 455111 Sample Oates: 10/9/2017 -10/16/2017 Nuclide Activity 2 Sigma Error MOA 1-13 1 <1.17E-0 2 0 OOE+O O 1.17E-02 Cs-134 <1.SSE-02 OOOE+OO 1.SSE-02 Cs-137 <1.BOE-02 0 OOE+OO 1 80E-02 Be-7 <1.15E-01 0 OOE+OO 115E-01 K-40 <2.71E-01 O.OOE+OO 2 71E-01 Sample ID: 455447 Sample Dates: 10/16/2017 -10/2312017 Nuclide Activity 2 Sigma Error MDA 1-131 <1.9BE-02 O.OOE+OO 1 98E-02 Cs-134 <1.54E-02 O.OOE+OO 1.54E-02 Cs-137 <1.SSE-02 O.OOE+OO 1.55E-02 Be-7 <1.32E-01 O.OOE+OO 1 32E-01 K-40 4.02E-01 2 OSE-01 2 69E-01 Sample ID: 456077 Sample Dates: 10/23/2017 -10/30/2017 Nuclide Activity 2 Sigma Error MOA 1-131 <2 33E-02 0 OOE+OO 2 33E-02 Cs-134 <2 OBE-02 0.00E+OO 2 OBE-02 Cs-137 <1 51E-0 2 0 OOE+OO 1 51E-02 Be-7 <12 0E-01 0 OOE+OO 1 20E-01 K-40 6.17E-01 196E-01 135E-01 Sample ID: 461443 Sample Dates: 10/30/2017 -1 1/6/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <2.28E-02 OOOE+OO 2 2SE-02 Cs-134 <1.62E-02 0 OOE+OO 1.62E-02 Cs-137 <1.73E-02 OOOE+OO 1 73E-02 Be-7 <1.18E-01 0 OOE+OO 118E-01 K-40 5.23E-01 1 BBE-01 1 76E-01 Sample ID: 461999 Sample Dales: 11/6/2017

11/13/2017 Nuclide Activity 2 S i gma Error MDA 1-131 <2.42E-02 O.OOE+OO 2.42E-02 Cs-134 <2 10E-02 O.OOE+OO 2 10E-02 Cs-137 <1.40E-02 O.OOE+OO 1 40E-02 Be-7 *<1 11E-01 O.OOE+OO 111E-01 K-40 5 93E-01 215E-01 221E-01 Sample ID: 462638 Sample Dates: 11/13/2017

-11/20/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <1 91E-02 0.00E+OO 191E-02 Cs-134 <1 34E-0 2 O.OOE+OO 1 34E*02 Cs-137 1 63E-02 0 OOE+OO 1 63E-02 Be-7 <1 OBE-01 OOOE+OO 1 OBE-01 K-40 4 35E-01 1 99E-01 2 45E-01 Sample ID: 463127 Sample Dates: 11/20/2017 -11/27/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <2 35E-02 0 OOE+OO 2 35E-02 Cs-134 <1 61E-02 0 OOE+OO 1.61E-02 Cs-137 <1.BOE-02 0 OOE+OO 1.BOE-02 Be-7 <1.25E-01 0 OOE+OO 1 25E-01 K-40 4.42E-01 1.S9E-01 213E-01 Sample ID: 463537 Sample Dates: 11/27/2017 -12/4/2017 Nuclide Activity 2 Sigma Error MDA 1-13 1 <2.16E-02 O.OOE+OO 2 16 E-02 Cs-134 <1.42E-02 O.OOE+OO 1.42E-02 Cs-137 <1.47E-02 O.OOE+OO 1.47E-02 Be-7 <1 29E-01 0.00E+OO 129E-01 K-40 3.65E-01 1 95E-01 2 SOE-01 Sample ID: 464178 Sample Dates: 12/4/2017 -12/11/2017 Nuclide Activity 2 Sigma Error MDA t-131 <2.26E-02 0 OOE+O O 2 26E-02 Cs-134 <2. 17E-02 0 OOE*OO 2 17E-02 Cs-137 <1.SOE-02 0 OOE+OO 1 SOE-02 Be-7 <1 19E-01 0 OOE+OO 119E-01 K-40 5.86E-01 1 90E-0 1 1 33E-01 Report Generated@ 3/21/2018 14.30 38 c (!@ EnRad Laboratories Appendix E Page 21 of 93 Duke Energy Annual Report -Appendix E 13339 Hagers Fe r ry Road Hun te rsvi l le , North Carolina 28078 OCONEE Radiological Environmental Monitoring Analysis Report

2017 (Appendix E) Media Type: AIR RAOIOIODINE Concentration (Activity):

pCi/m3 Sample Point 077 [ INDICATOR

SW@ 1 miles J Sample ID: 464735 Sample Dates: 12/11/2017

-12/18/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <1.SOE-02 OOOE+OO 1.BOE-02 Cs-134 <1.72E-02 0 OOE+OO 1 72E-02 Cs-137 <1 53E-02 OOOE+OO 1 53E-02 Be-7 <1.20E-01 0 OOE+OO 1.20E-0 1 K-40 5.89E-01 1.98E-01 1 73E-0 1 Sample ID: 465001 Sample Dates: 12/18/2017 -12/26/2017 Nu c lide Activity 2 Sigma Error MDA 1-131 <3 20E-02 O.OOE+OO 3 20E-02 Cs-134 <1.41E-02 O.OOE+OO 1 41E-02 Cs-137 <1 45E-02 O.OOE+OO 1 45E-02 Be-7 <1 13E-01 0.00E+OO 113E-01 K-40 3 61E-01 1 57E-01 1 75E-01 Sample ID: 465237 Sample Dates: 12/2612017 -1/2/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <2.67E-02 O.OOE+OO 2.67E-02 c~-134 <1.78E-02' O.OOE+OO 1 78E-02 C$-13 7 <1 81E-02 0 OOE+OO 1 81E-02 Be-7 <1.32E-01 0 OOE+OO 1.32E-0 1 K-40 4.70E-01 191E-01 211E-01 Sample Point 078.1 [INDICATOR* WSW@ 0.53 miles J Sample ID: 431846 Sample Dates: 12/27/2016 -1/312017 Nuclide Activity 2 Sigma Error MDA 1-131 <9.00E-03 O.OOE+OO 9 OOE-03 Cs-134 <6 68E-03 0.00E+OO 668E-03 Cs-137 <7.71E-03 O.OOE+OO 7 71E-0 3 Be-7 <4 63E-02 O.OOE+OO 4 63E*02 K-40 364E-01 1.47E-01 1 52E-01 Sample ID: 4*32247 Sample Dates: 1/3/2017 -1/9/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <9 60E-03 O.OOE+OO 9.60E-03 Cs-134 <9 08E-03 O.OOE+OO 9 08E-03 Cs-137 <766E-03 O.OOE+OO 7.66E-03 Be-7 <5.99E-02 0 OOE+OO 5.99E-02 K-40 <3.45E-01 0 OOE+OO 3.45E-01 Sample ID: 432941 Sample Dales: 1/9 1 2017

1/16/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <8 9SE-03 OOOE+OO 8 96E-03 Cs-134 <6.2SE-03 0 OOE+OO 6.26E-03 Cs-137 <7.77E-03 O.OOE+OO 7 77E-03 Be-7 <5 05E-02 O.OOE+OO 5 05E-02 K-40 3 86E-01 1 30E-01 2 75E-02 Samp l e ID: 433337 Sample Oates: 1/1612017.

1/23/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <1 17E-02 O.OOE+OO 117E-02 Cs-134 <7 29E-03 O.OOE+OO 7 29E-0 3 Cs-137 <6 49E-03 O.OO E+OO 6.49E-03 Be-7 <5.SOE-02 O.OOE+OO 5.SOE-02 K-40 3.93E-01 1.42E-01 1. 13E-01 Sample ID: 433756 Sample Dates: 1/23/2017 -1/30/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <9.98E-03 0 OOE+OO 9 98E-03 Cs-134 <6. 70E-03 0 OOE+OO 6 70E-03 Cs-137 <7 08E-03 0 OOE+OO 7 08E-03 Be-7 <5.07E-02 0 OOE+O O 5 07E-02 K-40 <2 62E-01 0.00E..0 0 2 62E*01 Sample ID: 434496 Sample Dates: 1130/2017 -2/612017 Nuclide Activity 2 S igma Error MDA 1-131 <114E*02 o.OOE+-00 114E-02 Cs-134 <7 75E-03 0 OOE+OO 7 75E-03 Cs-137 <6.34E-03 O.OOE+OO 6.34E-03 Be-7 <7 67E-02 0 OOE+OO 7.67E-02 K-40 3.31E-01 166E-01 2.08E-01 Sample ID: 435142 Sample Oates: 2/6/2017 -2/13/2017 Nuclide Activity 2 Sigma Error MOA 1-131 <8.43E-03 0 OOE+OO 8.43E-03 Cs-134 <7 96E-03 0 OOE+O O 7.96E-03 Cs-137 <7 13E-03 O OOE+OO 7 13E-03 ' Be-7 <1 04E-02 O.OOE+OO 1 04E*02 K-40 4 19E-01 1.44E-01 1 04E*01 Report Generated@ 3/21/2016 14: 30: 36 c f!@ EnRad Laboratories Appendix E -Page 22 of 93 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersville , North Carolina 26078 OCONEE Radiological Environm*ental Monitoring Analysis Report* 2017 (Appendix E) Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 Sample Point 078.1 [ INDICATOR -WSW @ 0.53 miles ] Sample ID: 435843 Sampl* Dates: 2/13/2017 -2/20/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <4.41E-03 O.OOE+OO 4.41E-03 Cs-134 <6.79E-03 0 OOE+OO 6.79E-03 Cs-137 <8.45E-03 0 OOE+OO 8.45E-03 Be-7 <6.57E-02 OOOE+OO 6.57E-02 K-40 3.85E-01 1.34E-01 2.98E-02 Sample ID: 436295 Sample Dates: 2120/2017

2127/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <1 07E-02 O.OOE+OO 1.07E-02 Cs-134 <7.01E-03 0 OOE*OO 7.01E-03 Cs-137 <9.21E-03 O.OOE+OO 9.21E-03 Be-7 <5.96E-02 O.OOE+OO 5.96E-02 K-40 <1.94E-01 O.OOE+OO 1.94E-01 Sample ID: 436751 Sample Dates: 2/27/2017.

3/6/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <8.44E-03 0 OOE+OO 8.44E-03 Cs-134 <9.20E-03 O.OOE+OO 9 20E-03 Cs-137 <8.25E-03 O.OOE+OO 8.25E-03 Be-7 <4.92E-02 O.OOE*OO 4.92E-02 K-40 <1 96E-01 O.OOE+OO 1.96E--0 1 Samp l e ID: 437622 Sample DatH: 3/6/2017 -3/13/2 017 Nuclide Activity 2 Sigma Error MDA 1-131 <6 83E-03 O.OOE+OO 6.83E-03 Cs-134 <4 SOE-03 0 OOE+OO 4.SOE-03 Cs-137 <848E-03 O.OOE+OO 8.48E-03 Be-7 <5.12E-02 O.OOE+OO 5.12E-02 K-40 1.76E-01 8.68E-02 2.81E-02 Sample ID: 438335 Sample Dates: 3/13/2017. 3/20/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <7 49E-03 0.00E+OO 7.49E-03 Cs-134 <5 94E-03 O.OOE+OO 5.94E-03 Cs-137 <1.07E-02 0.00E.00 1.07E-02 Be-7 <6 39E-02 O.OOE+OO 6.39E-02 K-40 1 93E-01 1.03E-01 1.06E--01 Sample ID: 438840 Sample Dates: 3/20/2017. 3/27/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <8 SOE-03 O.OOE+OO 8.90E-03 Cs-134 <7 52E--03 OOOE*OO 7 52E-03 Cs-137 <115E-02 OOOE+OO 1.15E-02 Be-7 <4.14E-02 OOOE+O O 4 14E-02 K-40 <2 , 16E-01 O.OOE+OO 216E-01 Sample ID: 439222 Sample Dates: 3/27/2017 -4/3/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <1 01E-02 0 OOE+OO 1 01E-02 Cs-134 <8 75E-03 0 OOE+OO 8.75E-03 Cs-137 <9.65E-03 0 OOE+OO 9 65E-03 Be-7 <6 69E-02 0 OOE+OO 6.69E-02 K-40 2 27E-01 1 25E-01 1.45E-01 Sample ID: 440044 Sample Dates: 4/3/2017. 4/10/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <1.07E-02

O.OOE+OO 1 0 7E*02 Cs-134 <8.SSE-03 O.OOE*OO 8 55E*03 Cs-137 <1.11E-02 0 OOE+OO 111E-02 Be-7 <5.38E-02 0 OOE+OO 5 38E-02 K-40 2 BOE-01 1 31E-01 1 37E-01 Sample ID: 440632 Sample Dates: 4/10/2017

-4/17/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <8 94E-03 0 OOE+OO 6.94E-03 Cs-134 <8 72E-03 OOOE+OO 8 72E-0 3 Cs-137 <5 SSE-03 0 OOE+OO 5.SSE.0 3 Be-7 <4.65E--02 OOOE+OO 4.65E*02 K-40 4 48E-01 1 53E-01 1 22E-01 Sample ID: 441448 Sample Dates: 4/17/2017 -4/24/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <7 29E-03 O.OOE+OO 7 29E*03 Cs-134 <6 90E-03 0 OOE+OO 6 90E-03 Cs-137 <9 83E-03 0 OOE+OO 9 83E.0 3 Be-7 <6 33E-02 0 OOE*OO 6.33E.0 2 K-40 <3 38E-01 0 OOE+OO 3.38E-01 Report Generated@ 3/21/2018 14.30: 38 c f!@) EnRad Laboratories Appendix E

Page 23 of 93 Ouke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersville , North Carolina 28078 OCONEE Radiological Environmental Monitoring Analysis R~port -2017 (Appendix E) Media Type: AIR RADIOIODINE Concentration (Activity)

pCl/m3 Sample Point 078.1 [ INDICATOR

-WSW@ 0.53 miles] Sample ID: 441897 Sample Oates: 4124/2017 -5/1/2017 Nuclide Activity 2 Sigma Error MOA 1-131 <116E-02 O.OOE+OO 116E-02 Cs-134 <7 30E-03 O.OOE+OO 7 30E s o3 Cs-137 <7 .SSE-03 O.OOE+OO 7 45E-03 Be-7 <5.86E-0 2 0.00E+OO 5 86E-02 K-40 5.14E-01 1.61E-01 316E-02 Sample ID: 442358 Sample Dates: 511 f 2017

518/2017 Nuclide Activity 2 Sigma Error MDA 1-13 1 <6.81E-0 3 O.OOE+OO 681E-03 Cs 134 <9.0SE-0 3 O.OOE+OO 9.08E-03 Cs-137 <1.07E-02 O.OOE+OO 1.07E-02 Be-7 <6 57E-02 O.OOE+OO 6 57E-02 K-40 <2 97E-01 O.OOE+OO 2.97E-01 Sample ID: 442901 Sample Dates: 518/2017
5115/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <9 JOE-03 O.OOE+OO 9 JOE-03 Cs-134 <4 97E-03 O.OOE+OO 4 97E-03 Cs-137 <7 98E-03 O.OOE+OO 7.98E-03 Be-7 <5 19E-0 2 O.OOE+OO 5 19E-0 2 K-40 5 48E*01 1.64E-01 3 OJE-02 Sample ID: 443341 Sample Datu: 5/15/2017.

5122/2017 Nuclide Activity 2 Sigma Error MDA 1-1 3 1 <9 64E-03 0.00E+OO 9 64E-03 Cs-134 <6.41E03 O.OOE+OO 6 41E-03 Cs-137 <7 96E-0 3 O.OOE+OO 7.96E-03 B e-7 <5.21E-02 O.OOE+OO 5.21E-02 K-40 4.80E-01 1.48E-01 2.83E-02 Sample ID: 443893 Sample Dates: 5/22/2017 -5/30/2017 N u clide Activity 2 Sigma Error MDA 1-13 1 <8 21E-03 0.00E+OO 8.21E-03 C1.-134 <7 90 E-03 O.OOE+OO 7 OOE-03 Cs-137 <7 39E 03 O.OOE+OO 7.39E-03 Be-7 <4 42E-02 O.OOE+OO 4 42E-02 K-40 5 48E-0 1 1.53E-01 2 61E-02 Sample ID: 444300 Sample Dates: 5130/2017

6/5/2017 Nuclide Activity 2 Sigma Error MDA 1-1 31 <9 71E-03 O.OOE+OO 9 71E*03 Cs-134 <7.45E-03 O.OOE+OO 7.45E-03 Cs-137 <1 34E-02 O.OOE+OO 1 34E-02 Be-7 <6.4BE-02 0 OOE+OO 6.48E-02 K-40 <2.69E-01 O.OOE+OO Z 69E-01 Sample ID: 445362 Sample Dates: 6/5/2017.

6/12/2017 Nu c lide Activity 2 Sigma Error MDA 1-131 <1 03E-02 O.OOE+OO 1 03E-02 Cs-134 <9 36E-03 0 OOE+OO 9 36E-03 Cs-137 <111E-02 0 OOE+OO 111E*02 Be-7 <5.63E-0 2 O.OOE+OO 5 63E-0 2 K-40 2 18E-01 111E-01 1 OBE-01 Sample ID: 446362 Sample Oates: 6/1212017. 6/19/2017 tf u: Clide Activity 2 Sigma Error MDA 1-131 <1.30E-02 O OOE.0 0 1 30E-02 Cs-134 <9.14E-03 0 OOE+O O 9 14E-03 Cs-137 <1 14E-02 0 OOE+-0 0 1.14E-0 2 Be-7 <4.38E-02 0 OOE+OO 4 38E-02 K-40 <2.57E-01 O.OOE+O O 2 57E-01 Sample ID: 446860 Sample Date$: 6/19/2017 -6/26/2017 Nuclide Activity 2 Sigma Erro r MDA l.-131 <6.91E-03 0 OOE+OO 6 91E-03 C s-134 <5.87E-03 0 OOE+OO 5 87E-03 C s-137 <9.12E-03 O.OOE+OO 9 1 2E-0 3 Be-7 <5.16E-02 0 OOE+OO 5 16E-02 K-40 <2.40E-01 0 OOE+OO 2 40E*01 Sample ID: 447234 Sample Oates: 6126/2017

7/3/2017 t,luclide Activity 2 Sigma Error MOA 1-131 <9.70E-03 O.OOE+OO 9 70E-03 C s-134 <6.76E-03 O.OOE+OO 6.76E-0 3 C s-137 <9 92E-03 O.OOE+OO 9 , 92E-03 Be-7 <5.86E-02 O.OOE+OO 5 86 E*02 K-4 0 8.43E-92 113 E-0 1 1.86E-01 Report Generated@

3/21/2018 14: 30 38 c f@ EnRad Laboratories Appendix E -Page 24 of 93 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersvi ll e. North Carolina 28078 OCONEE Radiological EnvironmentarMonitoring Analysis Report -2017 (Appendix E) Media Type: AIR RAOIOIOOINE Concentration (Activity): pCi/m3 Sample Point 078.1 [INDICATOR* WSW@ 0.53 miles J Sample ID: 447844 Sample Oates: 71312017

7/10/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <1.00E-02 0 OOE+OO 1.00E-02 Cs-134 <6.58E-03 0 OOE+OO 6 58E-03 Cs-137 <1.18E-02 0.00E+OO 118E*0 2 Be-7 <4.08E-02 O.OOE+OO 4.0SE-02 K-40 <2.38E-01 O.OOE+OO 2 38E-01 Sample ID: 448312 Sample Dates: 7/10/2017
7/16/2017 Nuclide Activity 2 Sigma Error MOA 1-1 31 <8.72E-03 O.OO E+OO 8 7 2 E-03 Cs-1 34 <5.58E-03 O.OOE+OO 5.58E-03 Cs-137 <6.93E-03 O.OOE+OO 6 9 3 E-03 B e-7 <5.54E-02 O , OOE+OO 5 54E-02 K-40 1.53 E-01 1 06E-01 1 38 E-0 1 Sample ID: 448928 Sample Dates: 7117/2017.

7/2412017 Nuclide Activity 2 Sigma Error MDA 1-131 <5.SSE-03 O.OOE+OO 5 SSE-03 Cs-134 <9.04E-03 0 OOE+OO 904E-03 Cs-137 <9.70E-03 OOOE+OO 9 70E-03 B e-7 <6.92E-02 0 OOE+OO 6 92E-02 K-40 <2.65E-01 0 OOE+OO 2.65E-01 Sample ID: 449257 Sample Dates: 7/2412017

7131/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <1.0SE-02 O.OOE+OO 1 OSE-02 Cs-134 <6 10E-03 0 OOE+OO 6.10E-03 Cs-137 <1 06E-02 0 OOE+OO 1.06E-02 Be-7 <3 03E-02 O.OOE+OO 3.03E-02 K-40 2 93E-01 116E-01 2.94E-02 Sample ID: 449977 Sample Dates: 7131/2017

-8f7/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <7.79E-03 0 OOE+OO 7.79E-03 Cs-134 <7.70E-03 0 OOE+OO 7 70E-03 Cs-137 <1.01E-02 O.OOE+OO 1 01E-0 2 Be-7 <6.16E-02 0 OOE+OO 6 16 E-02 K-40 1.94E-01 1 17E-01 1 46E-01 Sample ID: 450244 Sample Dates: 8f7/2017 -8/1412017 Nuclide Activity 2 Sigma Error MDA 1-131 <7.92E-03 0 OOE+OO 7 92E*03 C s-134 <6.48E-03 0 OOE+OO 6.46E-03 Cs-137 <8.67E-03 0 OOE+OO 8 67E-03 B e-7 <6.32E-02 0 OOE+O O 6.32E-0 2 K-40 1 63E-01 9 56E-02 6.87E-02 Sample ID: 450761 Sample Dates: 8114/2017 -8/2112017 Nuclide Activity 2 Sigma Error MOA 1-131 <6 44E-03 0 OOE+O O 6.44E-0 3 Cs-134 <8 68E-03 O.OOE+O O 8.68E-03 Cs-137 <1 13E-02 O.OOE+OO 1.13E-02 Be-7 <5.87E-02 0 OOE+OO 5.87E--02 K-40 <2 SOE-01 O.OOE+OO 2.60E-0 1 Sample 10: 451225 Sample Oates: 8/21/2017 -B/2812017 Nuclide Activity 2 Sigma Error MOA 1-131 <8.37E-03 0 OOE+OO 8 37E-0 3 Cs-134 <6.78E-03 OOOE+OO 6 78E-0 3 Cs-137 <8.43E-03 OOOE+OO 8.43E*03 Be-7 <3_59E-02 0 OOE+O O 3 59E-0 2 K-40 2 15E-01 1.12E-01 1 22E*01 Sample 10: 451568 Sample Oates: 8128/2017 -915/2017 Nuclide Activity 2 Sigma Error MOA 1-131 <8 OOE-03 O.OOE+OO 8.00E-0 3 Cs-134 <7 84E-03 0 OOE+OO 7.84E-03 Cs-137 <8 24E-03 O.OOE+O O 8.24E-0 3 Be-7 <4 97E-02 O.OOE+OO 4.97E*02 K-40 <2 16E-01 O.OOE+OO 2.16E-01 Sample ID: 452402 Sample Dates: 9/512017 -9/11/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <7.28E-03 0 OOE+O O 7 28E*03 Cs-134 <5.24E-03 0-00E+O O 5 24E-03 Cs-137 <9.89E-03 0 OOE+OO 9 89E-03 Be-7 <6.43E-02 0 OOE+O O 6 43E-02 K-40 <2.27E-01 0 OOE+O O 2.27E*01 Report Generated@ 3/21/2018 14: 30*38 c (ru) EnRad Laboratories Appendix E

Page 25 of 93 Duke Energy Annua l Report
Appendix E 13339 Hagers Ferry Road Huntersville , North Carolina 28078 OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: AIR RADIOIODlNE Concentration (Activity)

pCi/m 3 Sample Point 078.1 [ INDICATOR

-WSW@ 0.53 miles] Sample ID: 452821 Sample Dates: 9/11/2017 -9/18/2017 Nuclide Activity 2 S i gma Erro r MOA 1-131 <1 21E-02 O.OOE+OO 1.2 1 E-02 Cs-134 <1 10E-02 O.OOE+OO 1.10E-02 Cs-13 7 <1 24E-02 O.OOE+OO 1.24E-0 2 Be-7 <5 70E-0 2 O.OOE+OO 5.70E-0 2 K-40 305E-01 1.99E-01 2.80E-01 Sample 10: 452976 Sample Dates: 9/18/2017 -9/25/2017 Nuclide Activity 2 Sigma Error MOA 1-131 <7 36E-03 O.OOE+OO 7.36E-03 C s-134 <8.SOE-03 O.OOE+OO 8.50 E-03 Cs-13 7 <1 25E-0 2 O.OOE+OO 1.25E-02 B e-7 <7 1 0 E-02 O.OOE+OO 7.10E-02 K-40 2.6 2 E-01 1.4 2 E-01 1.78E-01 Sample 10: 453480 Sample Dates: 9/25/2017 -10/2/2017 Nuclide Activity 2 Sigma Error MOA 1-131 <1.90E-02 O.OOE+OO 1.90E-02 Cs-134 <1.62E-02 O.OOE+OO 1.62E-02 Cs-137 <1.46E-02 O.OOE+OO 1.46E-02 Be-7 <1.17E-01 O.OOE+OO 117E-01 K-40 4.02E*01 172E-01 1.84E-01 Sample ID: 454255 Sample Dates: 1012/2017 -1013/2017 Nuclide Activity 2 Sigma Error MOA 1-131 <4.60E-02 OOOE+OO 4.60E-02 Cs-134 <3 98E-02 O.OOE+OO 3.98E-02 Cs-137 <4.62E-02 O.OOE+OO 4.62E-0 2 Be-7 <3.18E-01 O.OOE+OO 3.18E-01 K-40 9.25E-01 5 15E-01 7.70E-01 Sample ID: 455112 Sample Dates: 10/13/2017 -10/1412017 Nuclide Activity 2 Sigma Error MOA 1-131 <5.10E-0 2 O.OOE+OO 5.10E-02 Cs-134 <4.9 2 E-02 O.OOE+OO 4.92E-02 C s-137 <4.81E-02 O.OOE+OO 4.81E-02 Be-7 <3.00E-01 O.OOE+OO 3.00E-01 K-40 3 94E+OO 7 08E*01 712E-01 Sample ID: 455448 Samp l e Dates: 10/16/2017 -1012312017 Nuclide Activity 2 S i gma Error MDA 1-131 <2.52E-02 O.OOE+OO 2.52E-02 Cs-134 <1.SOE-0 2 OOOE+OO 1.BOE-02 Cs-137 <1.60E-02 OOOE+OO 1.60E-02 Be-7 <1 39E-01 OOOE+OO 1 39E-01 K-40 7 59E-01 2.1 0E-01 3 61E 02 Sample ID: 456078 Sample Oates: 10/23/2017 -1013012017 Nuclide Activity 2 Sigma Error MDA 1-1 3 1 <1 83E-02 OOOE+OO 1.83E*0 2 Cs-134 <1 70E-02 0 OOE+OO 1.70E*02 Cs-137 <1 82E-02 O.OOE+O O 1 82E*0 2 B e*7 <1 38E*01 O.OOE+O O 138E-01 K-40 5.0SE-01 2 06E*01 2 34E-01 Sample ID: 481444 Sample Dates: 10/30/2017 -1116/2017 Nuclide Activity 2 Sigma Error MOA 1-1 3 1 <1.84E-02 O.OOE+OO 1 84E*02 Cs-1 34 <1 47E-02 O.OOE+OO 1 47E*0 2 Cs-137 <1.49E-02 0 OOE+OO 1 49E-02 Be-7 <1 31E-01 0 OOE+OO 1 31E*01 K-40 6 10E-01 2 OOE-01 177E-01 Sample ID: 462000 Sample Oates: 111612017 -11113/2017 Nuclide Activity 2 S i gma Error MDA l-13 1 <2 19E-02 OOO E+OO 2 19E-02 Cs-134 <1 79E-0 2 0 OOE+OO 1 79E*02 Cs-1 3 7 <2 18E-02 0 OOE+OO 2 18E-0 2 Be-7 <1.30E-01 0 OOE+0 1l 1 30E-01 K-40 4 35E-01 1.69E-01 1 45E*01 Sample ID: 462639 Sample Oates: 11/1312017 -1112012017 Nuclide Activity 2 Sigma Error MOA 1*1 3 1 <2 38E*02 0 OOE+OO 2 38E-0 2 Cs-1 34 <1 97E-02 O.OO E+OO 1 97E-0 2 Cs-137 <1 58E-02 O.OOE+OO 1 58E-02 8~7 <1 42E-01 0 OOE+OO 142E*01 K""IO 5 8 6 E*01 2.20E-01 2 46E-01 Report Generated@ 3/21/2018 14 30: 38 c f!ID EnRad Laboratories Appendix E

Page 26 of 93 Duke Energy Annual Report
Appendix E 13339 Hagers Ferry Road Huntersville , North Carolina 28078 OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: AIR RADIOIODINE Concentration (Activity):

pCl/m3 Sample Point 078.1 [INDICATOR* WSW@ 0.53 miles J Sample ID: 463128 Sample Dates: 11/20/2017 -11/27/2017 Sample ID: 463538 Sample Dates: 11/27/2017 -12/4/2017 Sample ID: 464179 Sample Dates: 12/4/2017 -12/11/2017 Sample ID: 464736 Sample Dates: 12/11/2017 -12/18/2017 Sample ID: 465002 Sample Dates: 12/18/2017

12/26/2017 Sample 10: 465238 Sample Dates: 12/26/2 017 -1/2/2018 Sample Point 079 [ INDICATOR

-NE@ 0.56 miles] Sample ID: 431847 Sample Dates: 12/27/2016 -1/3/2017 Sample ID: 432248 Sample Dates: 1/3/2017 -1/9/2017 Sample ID: 432942 Sample Dates: 1/9/2017 -1/16/2017 Sample ID: 433338 Sample Dates: 1/16/2017 -1/23/2017 Report Generated@ 3/21/2018 14: 30: 38 Duke Energy Annual Report -Appendix E Nucllde 1-131 Cs-134 Cs-137 Be-7 K-40 Nuclide 1-131 Cs-134 Cs-137 Be-7 K-40 Nuclide 1-131 Cs-134 Cs-137 Be-7 K-40 Nucllde 1-131 Cs-134 Cs-137 Be-7 K-40 Nuclide 1-131 Cs-134 Cs-137 Be-7 K-40 Nuclide 1-131 Cs-1 34 Cs-137 Be-7 K-40 Nuclide 1-131 Cs-134 Cs-137 Be-7 K-40 Nuclide 1-131 Cs-134 Cs-137 Be-7 K-40 Nuclide 1-1 31 Cs-134 Cs-137 Be-7 K-40 Nuclide 1-131 Cs-134 Cs-137 Be-7 K-40 EnRad Laborator i es 13339 Hagers Ferry Road Huntersville, North Carolina 28078 Activity <2 OSE-02 <2 OOE-02 <1.85E-02 <1.19E-01 6.0SE-01 Activity <2 67E-02 <1.78E-02 <1.72E-02 <1 23E-01 4.82E-01 Activity <2 OSE-02 <1 82E-02 <1 71E-0 2 <1 22E-01 5 80E-01 Activity <2 18E-02 <1.66E-02 <1 68E-02 1 34E-02 4 74E-01 Activity <3 57E-02 <1 48E-02 <1.73E-02 <1.07E-0 1 4 53E-0 1 Activity <2 54E-02 <1 64E-02 <1 97E-02 <1 24E-01 4 03E-01 Activity <1 17E-02 <1.01E-02 <8 SOE-03 <3 76E-02 381E-01 Activ i ty <7 37E-03 <9 40E-03 <1 36E-02 <7 OOE-02 5 73E-01 Activity <7 53E-03 <7 76E-03 <4.47E-03 <3.66E-02 <2 81E-01 Activity <8 33E-03 <8 60E-03 <9 06E-03 <619E-02 4 12E-01 2 Sigma Error MDA 0.00E+OO 2 OSE-02 O.OOE+OO 2.00E-02 OOOE+OO 1.85E-02 OOOE+OO 119E-01 2.25E-01 2.51E-01 2 Sigma Error MDA OOOE+OO 2.67E-02 0 OOE+OO 1 78E-02 0 OOE+OO 1 72E-02 0 OOE+OO 1 23E-01 161E 01 3 43E-02 2 Sigma Error MDA O.OOE+OO 2 OSE-02 0.00E+O O 1 82E-02 O.OOE+OO 1 71E-02 0.00E+OO 1 22E-01 1 94E-01 1 SSE-01 2 Sigma Error MDA 0 OOE+OO 2 18E-0 2 O.OOE+OO 1 66E-02 OOOE+OO 1.68E-02 9 33E-02 1.66E-0 1 1.70E-01 131E-01 2 Sigma Error MDA 0 OOE+OO 3 57E-02 0 OOE+OO 1.48E-02 0.00E+OO 1 73E-02 O.OOE+OO 1 07E-01 1 67E-01 1 58E-01 2 Sigma Error MDA 0.00E+OO 2 54E-02 O.OOE+OO 164E-02 0 OOE+OO 1 97E-02 0 OOE+OO 1 24E-01 1.97E-01 2 52E-01 2 Sigma Error MDA 0 OOE+OO 117E-02 0 OOE+OO 1.01E-02 0 OOE+OO 8.SOE-03 0 OOE+OO 3.76E-02 1.44E-01 1 24E-01 2 Sigma Error MDA O.OOE+OO 7 37E-03 0 OOE+OO 9 40E-03 O.OO E+OO 1.36E-02 O.OOE+OO 7.00E-02 1 92E-0 1 1.40E-0 1 2 Sigma Error MDA 0 OOE+O O 7 53E-03 0 OOE+OO 7 76E-03 0 OOE+OO 4.47E-0 3 0 OOE+OO 3.66E-02 0 OOE+OO 2.81E-01 2 Sigma Error MDA 0.00E+OO 8 33E-03 0.00E+OO 860E-03 0.00E+OO 9 06E-03 0 OOE+OO 6 19E-02 1 SSE-01 1 43E-01 Append i x E -Page 27 of 92 OCONEE Radiological Environmental Monitoring Analysis Rep'Ort. 2017 (Appendix E) Med ia Type: AIR RADIOIODINE Concentration (Activity}: pCi/m3 Sample Point 079 [ INDICATOR -NE@ 0.56 miles] Sample ID: 433757 Sample Dates: 1/23/2017 -1/30/2017 Nuclide Activity 2 Sigma Error MCA 1-13 1 <1.0SE-02 0 OOE+OO 1.0SE-0 2 Cs-134 <7.27E-03 O.OOE+OO 7 27E-03 Cs-137 <7.88E-03 O.OOE+OO 7 88E-03 Be-7 <5.16E-02 O.OOE+OO 516E-02 K-40 4.13E-01 1.46E-01 1 14E-01 Sample ID: 434497 Sample Dates: 1 1 30/2017

2/612017 Nuclide Activity 2 Sigma Error MCA 1-131 <6 79E-03 O.OOE+OO 6 79E-03 Cs-134 <8.46E-03 0 OOE+OO 8.46E-0 3 Cs-137 <7.92E-03 0 OOE+OO 7.92E-03 Be-7 <7.35E-02 0 OOE+OO 7 35E-02 K-40 3.45E-01 1 32E-01 1.04E-01 Sample ID: 435143 Sample Dates: 2/612017
2/13/2017 Nuclide Activity 2 Sigma Error MOA 1-131 <9.43E-03 0 OOE+OO 9 43E-03 Cs-134 <7.71E-03 O.OOE+OO 7 71E-03 Cs-137 <7 91E-03 O.OOE+OO 7 91E-03 8e-7 <5.52E-02 O.OOE+OO 5 52E-02 K-40 3.60E-01 1 59E-01 1 87E-01 Sample ID: 435844 Sample Dales: 2/13/2017
2/20/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <8 64E-03 O.OOE+OO 8.64E-03 Cs-134 <5 25E-03 0 OOE+OO 5.25E-03 Cs-137 <1 01E-02 0 OOE+OO 1.01E-02 Be-7 <5.16E-02 0 OOE+OO 5 16E-0 2 K-40 <2 09E-01 OOOE+OO 2.09E-01 Sample ID: 436296 Sample Datea: 2/20/2017

-2/27/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <7 97E-03 O.OOE+OO 7 97E-03 Cs-134 <3.63E-03 t O.OOE+OO 3 63E-03 Cs-137 <9.20E-03 O.OOE+OO 9 20E-03 Be-7 <4 73E-02 OOOE+OO 4 73E-02 K-40 2 82E-01 111E-01 2 83E-02 Sample ID; 436752 Sample Dales: 2/27/2017 -3/6/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <9 57E-03 OOOE+OO 9 57E-0 3 Cs-134 <7 75E-03 OOOE+OO 7 75E-03 Cs-137 <9.63E-03 OOOE+OO 9 63E-03 8e-7 <4.99E-02 0 OOE+OO 4 99E 0 2 K-40 <2.22E-01 O.OOE+OO 2 22E-01 Sample ID: 437623 Sample Dates: 3/6/2017 -3/13/2017 Nuclide Activity 2 Sigma Error MCA 1-131 <7 97E-03 O.OOE+OO 7 97E-03 Cs-134 <4.90E-03 O.OOE+OO 4 90E-03 Cs-137 <7 OSE-03 0 OOE+OO 7.06E-03 Be-7 <5.54E-02 0 OOE+OO 5 54E-02 K-40 4.32E-02 7 93E-02 1.39E 01 Sample ID: 438336 Sample Dalaa: 3/1312017

3/20/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <8.69E-03 OOOE+OO 8 69E-03 Cs-134 <8.07E-03 O.OOE+OO 6 07E-03 Cs-137 <116E-02 O.OOE+OO 1 16E-02 Be-7 <8.46E-02 O.OOE+OO 8 46E-02 K-40 <2.26E-01 0.00E+OO 2 26E-01 Sample ID: 438841 Sample Dates: 3/20/2017. 3/27/2017 Nuclide Activity 2 Sigma Error MOA 1-131 <9.30E-03 0 OOE+OO 9.30E-03 Cs-134 <7.14E-03 0 OOE+OO 7.14E-03 Cs-137 <1.10E-02 0 OOE+OO 110E-02 Be-7 <5.35E-02 0 OOE+OO 5 35E-02 K-40 <2.53E-01 O.OOE+OO 2 53E-01 Sample ID: 439223 Sample Dales: 3/2712017

-4/3/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <6.35E-03 0.00E+OO 6 35E*03 Cs-134 <7.98E-03 0 OOE+OO 7 98E-03 Cs-137 <8 93E-03 OOOE+OO 8.93E-03 Be-7 <5.82E-02 0 OOE+OO 5.82E-02 K-'10 <2.46E-01 OOOE+OO 2.46E 01 Report Generated@ 3/21/2018 14.30'38 ((![) EnRad laboratories Append i x E -Page 28 of 93 Duke Ene r gy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersville, North Carcx i na 28078 OCONEE Radiological Environmental Mt>nitoring Analysis Report -2017 (Appendix E) Media Type: AIR RADIOIODINE Concentration (Activity)

pCi/m3 Sample Point 079 [INDICATOR*

NE@ 0.56 mlles J Sample ID: 440045 Sample Dates: 4/3/2017 -4/10/2017 Nuclide Activity 2 S i gma Error MDA 1-131 <1.39E*02 O.OOE+OO 1.39E*02 Cs-134 <8.33E-03 OOOE+OO 8.33E*03 Cs-137 <9.72E-03 0 OOE+OO 9 72E-03 Be-7 <4.79E-02 0 OOE+O O 4.79E*02 K-40 1.89E-01 1.08 E-01 117E-01 Sample ID: 440633 Sample Dates: 4/10/2017 -4/17/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <6 9DE-03 0 OOE+OO 6 90E-03 Cs-134 <7 38E-03 0 OOE+OO 7 38E-03 Cs-137 <8 OOE-03 0 OOE+OO 8.00E-03 Be-7 <5 94E-02 OOOE+OO 5 94E-02 K-40 3.47E-01 1.35E-01 113E-01 Sample ID: 441449 Sample Pates: 4/17/2017 -4/24/2017 Nuclide Activity 2 Sigma Error MDA 1-13 1 <6.75E-03 O.OOE+OO 6.75E 03 Cs-134 <6.78E-03 O.OOE+OO 6.78E*03 Cs-137 <7.82E-03 0.00E+OO 7 82E-03 Be-7 <5.07E-02 O.OOE+OO 5 07E 02 K-40 2 94E-01 1 47E-01 1 8 2E-01 Sample ID: 441898 Sample Pates: 412412017 . 5/112017 Nuclide Activity 2 Sigma Error MDA 1-131 <7.68E-03 0 OOE+OO 7.68E*03 Cs-134 <7 OSE-03 0 OOE+OO 7.0SE-03 Cs-137 <7.48E-03 0 OOE+OO 7.48E-03 Be-7 <7 03E-02 0 OOE+OO 7.03E-02 K-40 4 1 8E-01 1.39E-01 2.90E-02 Sample ID: 442359 Sample Dales: 5/112017

5/812017 Nuclide Activity 2 Sigma Error MOA 1-131 <1 03E-02 0 OOE+OO 1.03E-0 2 Cs-134 <7 53E-03 0 OOE+OO 7.53E-03 Cs-13 7 <9 35E-03 OOOE+OO 9.35E-03 Be-7 <6.03 E-02 O.OOE+OO 6 03E*02 K-40 5.26E-01 168E-01 1.16E-01 Sample ID: 442902 Sample DalH: 5/8/2017 -5/1512017 Nuclide Activity 2 Sigma Error MPA 1-131 <8.02E-03 0 OOE+OO 8.02E-03 Cs-134 <5.87E-03 0 OOE+OO 5.87E-03 Cs-137 <9.62E-03 0 OOE+OO 9.62 E-03 B e-7 <4 77E-02 0 OOE+OO 4 77E-02 1<-4 0 4 90E-01 1 50E-01 2.83E-02 Sample ID: 443342 Sample Pates: 5/15/2017

-5/22/2017 Nuclide Activity 2 S i gma Error MDA l-131 <9 31E-03 0 OOE+OO 9.31 E-0 3 Cs-134 <8 50E-03 0 OOE+OO 8 50E-03 Cs-137 <6 83E-03 0 OOE+OO 6.83E-03 Be-7 <7 16E-02 0 OOE+OO 7 16E-02 K-40 4 59E-01 1 54E-0 1 1 05E-01 Sample ID: 443894 Sample Pates: 5/22/2017

5/30/2017 Nuclide Activity 2 Sigma Error MOA 1-131 <9.87E-03 O.OOE+OQ. 9 87E-03 Cs-134 <6.85E-03 0 OOE+OO 685E-03 Cs-137 <8.50E-03 0 OOE+OO 8 SOE-03 Be-7 <5 58E-02 O.OOE+OO 5 58E-0 2 K-40 <3 04E-01 0 OOE+OO 3.04E-01 Sample 10: 444301 Sample Dates: 5/30/2017

-61512017 Nuclide Activity 2 Sigma Error MPA 1-131 <5 84E-0 3 OOOE+OO 5.84E-03 Cs-134 <8 84E-03 0 OOE+OO 8.84E-0 3 C s-137 <1 04E-02 0 OOE+O O 1.04E-02 8 e-7 <6.70E-02 0 OOE+OO 6 70E-02 K-40 7.0SE-02 1.25E-01 2.14E-01 Sample IP: 445363 Sample Oates: 6/S/2017 -6/12/2017 Nuclide Activity 2 Sigma Error MPA 1-131 <8.62E-03 OOOE+OO 8 62E-03 C s-134 <8.21E-03 0.00E+OO 8 21E-03 C i-137 <111E-02 0 OOE+OO 111E-02 B e-7 <5.20E-02 0 OOE+OO 5 20E-02 K-40 <1 84E-01 OOOE+OO 1 84E-01 Report Generated@ 3/21/2018 14: 30 38 c fi ij) EnRad Laboratories Appendix E

Page 29 of 93 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersville North Carol in a 28078 OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: AIR RADIOIODINE Concentration (Activity)

pCi/m3 Sample Point 079 [INDICATOR*

NE@ 0.56 miles] Sample ID: 446363 Sample Dates: 6112/2017

611912017 Nuclide Activity 2 Sigma Error MDA 1-131 <8 SOE-03 O.OOE+OO 8.SOE-03 Cs-134 <7.47E-03 O.OOE+OO 7.47E-03 Cs-137 <9 27E-03 0.00E+OO 9 27E-03 Be-7 <6 44E-02 O.OOE+OO 644E-02 K-40 1 52E-01 9 83E-02 117E-01 Sample ID: 446861 Sample Dates: 6119/2017

-612612017 Nuclide Activity 2 Sigma Error MDA 1-131 <8 SSE-03 0.00E+OO 8 SSE-03 Cs-134 <9 93E-03 O.OOE+OO 9 93E-03 Cs-137 <1 19E-02 O.OOE+OO 119E-02 Be-7 <5.53E-02 0.00E+OO 5 53E-02 K-40 <2 61E-01 OOOE+oo 261E-0 1 Sample ID: 447235 Sample Dates: 6126/2017

71312017 Nuclide Activity 2 Sigma Error MDA 1-131 <1.24E*02 OOOE+OO 1 24E-02 Cs-134 <6.64E-03 0 OOE+-00 6.64E-03 Cs-137 <9.53E-03 0 OOE+OO 9.53E-03 Be-7 <4.7SE-02 OOOE+OO 4 75E-02 K-40 <1 90E-01 O.OOE+OO 190E-01 Sample ID: 447845 Sample Dates: 71312017.

711012017 Nuclide Activity 2 Sigma Error MDA 1-131 <7 9BE-03 O.OOE+OO 7.98E-03 Cs-134 <7 61E-03 O.OOE+OO 761E-03 Cs-137 <9 92E-03 O.OOE+OO 9 92E-03 Be-7 <5.46E-02 O.OOE+OO 5 46E-02 K-40 <1 92E-01 O.OOE+OO 1 92E-01 Sample ID: 448313 Sample Dates: 7110/2017 -7/17/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <6 OSE-03 0.00E+OO 8 OSE-03 Cs-134 <6.SOE-03 O.OOE+OO 6 SOE-03 Cs-137 <1.18E-02 O.OOE+OO 11BE-02 B e-7 <6.44E-02 0 OOE+OO 6 44E-02 K-40 <2 15E-01 0 OOE+OO 2 15E-01 Sample ID: 448929 Sample Dates: 7117/2017 -7124/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <6.91E-03 0 OOE+OO 6 91E-03 Cs-134 <7.75E-03 0 OOE+OO 7 75E-03 Cs-137 <7 95E-03 O.OOE+OO 7 95E-03 Be-7 <5 SSE-0 2 0 OOE+OO 5 5 6E-02 K-40 2 14E-01 1 04E-01 9 15E 02 Sample ID: 449258 Sample Dates: 712412017

713112017 Nuclide Activity 2 Sigma Error MDA 1-131 <9 52E-03 O.OOE+OO 9 52E-03 Cs-134 <3 51E*0 3 0 OOE+OO 3 51E-03 Cs-137 <8 69E-03 O.OOE+OO 8 89E 03 B e-7 <3.61E*02 0 OOE+OO 3 61E-02 K-40 <2.17E-01 0 OOE+OO 2 17E-01 Sample ID: 449978 Sample Dates: 713112017.

8/712017 Nuclide Activity 2 Sigma Error MDA 1-131 <7.51E-03 0 OOE+OO 7 51E-03 Cs-1 34 <7 68E-03 0 OOE+OO 7.68E-03 Cs-137 <9.53E-03 0 OOE+OO 9 53E-03 Be-7 <5 12 E-02 0 OOE+OO 5 , 1 2E*02 K-40 9 26E*02 8.46E-02 1.22E-01 Sample ID: 450245 Sample Dates: 817/2017 -8/14/2017 Nuclide Activity 2 Sigma Error MDA 1*131 <9 98E*03 O.OOE+OO 9 98E-03 Cs-134 <7 08E-03 0.00E+OO 7 OS E-03 Cs*137 <8 79E*03 OOOE+OO 8 79E-03 Be-7 <4 OOE-02 O.OOE+OO 4 06E-02 K-40 2 07E*01 1 10E-0 1 1 13E-01 Sample ID: 450762 Sample Dates: 8114/2017. 812112017 Nuclide Activity 2 Sigma Error MOA 1-131 <9.56E-03 0 OOE+OO 9 SSE-0 3 Cs-134 <8.41E-0 3 0 OOE+OO 6 41E-03 Cs-137 <8.56E*03 0 OOE+OO 8.SSE-03 Be-7 <4 74E-02 0 OOE+OO 4.74E-02 K-40 <234E-01 0 OOE+OO 2 34E-01 Report Generated@ 3/21/2018 14 30'38 c f![) EnRad Laboratories Appendix E

Page 30 of 93 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersv i lle, North Carolina 28078 OCONEE Radiological Environmental Monitoring Analysis Report. 2017 (Appendix E) Media Type: AIR RADIOIODINE Concentration (Activity):

pCi/mJ Sample Point 079 [ INDICATOR -NE @ 0.56 miles] Sample ID: 451226 Sample Oates: 8/21/2017

8 1 28 1 2017 Nuclide Activity 2 Sigma Error MOA 1-131 <9.71E*03 0 OOE+OO 9.71E-03 Cs-134 <8.93E*03 0 OOE+OO 8 93E-03 Cs-137 <111E-02 0 OOE+OO 1 11E-02 Be-7 <6.49E-02 0 OOE+OO 6 49E-02 K-40 3.0SE-01 1 18E-01 2 95E-02 Sample ID; 451569 Sample Dates: 8/28/2017
s.'S/2 0 17 Nuclide Activity 2 Sigma Error MOA 1-131 <7.62E-03 0 OOE+OO 7 62E-03 Cs-134 <5.17E-03 0 OOE+OO 5 17E-03 Cs-137 <9.46E-03 0 OOE+OO 946E-03 Be-7 <2 BSE-02 O.OOE+OO 2 85E-02 K-40 2 16E-01 1 03E-01 9 17E-02 Sample ID: 452403 Sample Oates: 915/2017
9111 1 2 0 17 Nuclid e Activity 2 Sigma Error MDA 1-1 31 <9 32E-03 0.00E+OO 9 32E-03 C s-\34 <7 30E-03 O.OOE+oo* 7.30E-03 C s-137 <1 37E-02 O.OOE+OO 1 37E-02 Be-7 <7.74E-02 0.00E+OO 7.74E-02 K-40 2.30E*01 126E-01 1.35E-01 Sample 10: 452822 Sample Dates: 9 111/2017
911812017 Nuclide Activity 2 Sigma Error MDA 1-131 <6.07E-03 0 OOE+OO 6.07E-03 Cs-134 <5.18E-03 O.OOE+OO 5.18E-03 Cs-13 7 <1 27E 02 OOOE+OO \.27E-02 Be-7 <6.16E-02 0 OOE+OO 616E-02 K-40 <2 19E-01 OOOE+OO 2.19E-01 Sample ID: 452977 Sample Dates: 9/18/2017
9125/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <B.07E-03 0 OOE+OO 8.07E-03 Cs-134 <5.49E*03 0 OOE+OO 5.49E-03 Cs-137 <1 09E-0 2 0 OOE+OO 1 09E-02 Be-7 <6 9BE.0 2 0 OOE+OO 6 9BE*02 K-40 <2 31E*01 0 OOE+OO 2 31E-01 Sample ID! 453431 Sample Dates: 9125/2017
1012/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <142E-02 O.OOE+OO 1 42E 02 Cs-134 <1 28E-02 0 OOE+OO 1 2BE-02 Cs-137 <1 42E-02 O , O OE+OO 1 42E-02 Be-7 <8.82E-02 0.00E+OO 8 82E-02 K-40 2 38E-01 1 27E-01 1 43E-01 Sample ID: 454256 Sample Dates: 1012/2017

-101912017 Nuclide Activity 2 Sigma Error MOA 1-131 <1 61 E-02 O OOE+OO 161E-02 Cs-134 <1.BOE-02 O.OOE+OO 1.SOE-02 Cs-137 <1 44E-02 0 OOE+OO 1.44E-02 Be-7 <110E-01 0 OOE+OO 110E-01 K-40 <3 79E-01 0 OOE+OO 3.79E-01 Sample ID: 455113 Sample Oates: 10/912 017

10/1612017 Nuclide Activity 2 Sigma Error MOA 1-131 <1 BOE-02 OOOE+OO 1.80 E*02 Cs-134 <1 30E-02 OOOE+OO 1 30 E-0 2 Cs-137 <1 55E-02 0 OOE+OO 1 55E*02 Be-7 <8 49E-02 0 OOE+OO B 49E*02 K-40 2 75E-0 1 1 46E 01 1 76E-01 Sample ID: 455449 Sample Oates: 10/16/2017

-10/2312017 Nuclide Activity 2 Sigma Error MDA 1-131 <2 46E-02 0.00E+OO 2 46E*02 Cs-134 <1 60E-02 OOOE+OO 1 SOE-02 Cs-137 <1 64E*02 O , OOE+OO 164E-02 Be-7 <1 51E-01 O.OOE+OO 1.51E*01 K-40 3.85E-01 144E-01 3.47E*02 Sample ID: 456079 Sample Oates: 10/2312017 -10130/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <2.29E-02 0 OOE+OO 2 29E-02 Cs-134 <1.45E-02 OOOE+OO 1.45E*02 Cs-137 <1 71E-02 0 OOE+OO 1 71E-02 Be-7 <1 19E-01 OOOE+OO 119E-01 K-40 4 67E-01 2.16E*01 2.75E-01 Report Generated@ 3/21/2018 14: 30: 38 c f!ID EnRad Laborato ri es Appendix E. Page 31 of 93 Duke Energy Annual Report

Appendix E 13339 Hagers Ferry Road Huntersville , North Carolina 28078 OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: AIR RADIOIODINE Concentration (Activity)

pCi/m3 Sample Point 079 [ INDICATOR

-NE@ 0.56 miles J Sample ID: 461445 Sample Datea: 1013012017 -111612017 Nuclide Activity 2 Sigma Error MDA 1-131 <2 35E*02 0.00E+OO 2.35E-02 Cs-134 <1 21E*02 0.00E+OO 1 2\E-02 Cs-137 <1.81E*02 O.OOE+OO 1 8\E-02 Be-7 <1.12E-0 1 O.OOE+OO 112E-01 K-40 6.63E*01 2 12E-01 1 92E-01 Sample ID: 462001 Sample Dates; 11/6/2017

11 1 1312017 Nuclide Activity 2 Sigma Error MDA 1-131 <2.43E*02 O.OOE+OO 2 43E-02 Cs-134 <1.86E-02 0.00E+OO 1 8 6E-02 Cs-137 <2 02E-02 0.00E+OO 2 02E-02 Be-7 <1.4 2E*01 0.00E+OO 1 42E-0 1 K-40 4.04E*0 1 2 07E-01 272E-01 Sample ID: 462640 Sample Dates: 11/1 3/2017 -11120/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <1 93E*0 2 0 OOE+OO 1.93E-0 2 Cs-134 <1 59E 0 2. 0 OOE+OO 1.59E-0 2 Cs-137 <1 87E-0 2 0 OOE+OO 1 87E*02 Be-7 <1 15E*01 0 OOE+OO 115E-01 K-40 554&01 1 82E-01 1.24E-01 Sample ID; 463129 Sample Oates: 11 1 20/2017 -11/27/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <202E-02 0 OOE+O O 2 02E-0 2 Cs-1 34 <168E*02 O.OOE+O O 1 68E-02 Cs-1 37 <1 55E*02 O.OOE+OO 1.55E-02 Be-7 <1 12E-0 1 O.OOE+O O 112E*01 K-40 6.42E-01 2.12E-01 193E-01 Sample ID: 463539 Sample Dates: 11/27 1 2017 -12/4/2017 Nuclide Activity 2 Sigma Error MDA 1*131 <2 19E*0 2 O.OOE+OO 2 19E-02 Cs'134 <1.49E*0 2 O.OOE+OO 1 49E-02 Cs-137 <1 76E*02 O.OOE+OO 1 76E 02 Be-7 <114E*01 O.OOE+OO 114E-01 K-40 <3.77E-01 O.OOE+OO 3 77E-01 Sample ID: 464180 Sample Dates: 12'4/2017
12 1 11 1 2017 Nuclide Activity 2 Sigma Error MDA 1-131 <2 30E-0 2 0 OOE+OO 2 30E*02 Cs-134 <1 76E-02 0 OOE+OO 1.76E-02 Cs-137 <1 SOE-02 OOOE+OO 1.50E*02 Be-7 <1 25E-01 O.O O E+OO 1.25E-0 1 K-40 4 63E-01 2.0GE-01 2.SOE-01 Sample ID: 464737 Sample Dates; 12/11/2017

-12/18/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <1 BSE-02 O.OOE+OO 1.85E-02 Cs-134 <1.79E-02 O.OOE+OO 1 79E-02 Cs-137 <2 03E-02 O.OOE+OO 2.03E-02 Be-7 <1.11E-01 0.00E+OO 111E-01 K-40 559E-01 2 15E-01 2 42E-01 Sample ID: 465003 Sample Dates: 12/18/2017 -12/26/2017 Nuclide Activity 2 Sigma Error MOA t-131 <3.11E*02 O.OOE+OO 311E-02 Cs-134 <1.46E*02 O.OOE+OO 1 48 E-02 Cs-137 <1.45E-02 O.OO E+OO 1 45E*02 Be-7 <1 16E*01 O.OOE+OO 11 6 E*01 K-40 4.59E*01 1.70E-01 1 68E-01 Samp l e ID: 465239 Sample Dates: 1212612017 -1/2/2018 Nuclide Activity 2 Sigma Error MDA 1-131 <2 57E-02 0 OOE+OO 2.57E-0 2 Cs-134 <1.57E-02 O.OOE+OO 1.57E*02 Cs-137 <1.80E*02 O.O OE+OO 1 eoe-02 Be-7 <1.32E-01 O.OOE+OO 1 , 32E*01 K-40 4.53E*01 1.67E-01 1.38E-01 Sample Point 081 [CONTROL* SE@ 9.33 miles J Sample I D: 431848 Sample Dates: 12/27/2016

1/3/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <9 64E-03 OOOE+OO 964E-03 Cs-134 <7.51E-03 0.00E+OO 7 51E-03 Cs*137 <8.28E-03 0 OOE+OO 828E-03 'Be-7 <4.16E-02 0 OOE+OO 4 16E-02 K-40 4 20E-01 1.56E*01 154E-01 Report Generated@

3/21/201814 30: 38 EnRad Laboratories Appendix E

Page 32 of 93 Duke Energy Annual Report
Appendix E 13339 Hagers Ferry Road Huntersvi ll e , North Carolina 28078 OCONEE Radiological Environmental
Monitoring Analysis Report* 2017 (Appendix E) Media Type: AIR RADIOIODINE Concentration (Activity)

pC ifm 3 Sample Point 081 [ CONTROL -SE @ 9.33 miles ) Sample ID: 432249 Sample Dates: 1/3/2017 -1/9/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <1.38E-02 0 OOE+OO 1 38E-02 Cs-134 <7.47E-03 0 OOE+OO 7 47E-03 Cs-137 <8.SOE-03 O.OOE+OO B SOE-03 Be-7 <6.87 E-02 0.00E+OO 6 87E-02 K-40 5.05E-01 1.69E-01 1 04E-01 Sample ID: 432943 Sample Dates: 1/9/2017 -1 1 1612017 Nuclide Activity 2 Sigma Error MDA 1-131 <6.66E-03 O.OOE+OO 6 66E-03 Cs-134 <8.4 2E-03 O.OOE+OO 8 42E-03 Cs-137 <1.15E-02 0.00E+OO 1 15E-02 Be-7 <8.01E-02 O.OOE+OO 8.01E-0 2 K-40 <3.04E-01 O.OOE+OO 3.04E-01 Sample ID: 433339 Sample Dales: 1/16/2017. 1 1 2312017 Nuclide Act i vity 2 S i gma Error MDA 1-131 <9.53E-03 O.OOE+OO 9.53E-03 Cs-134 <6.35E-03 O.OOE+OO 6 35E-03 Cs-137 <8.48E-03 O.OOE+OO 8.48E-03 Be-7 <S.12E-02 O.OOE+OO 5 12E-02 K-40 3.63E-01 1 3SE-01 1 03E*01 Sample ID: 433758 Sample Oates: 1/23 1 2017 -1 1 30/2017 Nuclide Activity 2 Sigma Error MOA 1-131 <1.0SE-02 O.OOE+OO 1 OSE-02 Cs-134 <6.38E-03 0 OOE+OO 6 38E-03 Cs-137 <990E--03 0 OOE+OO 9 90E-03 Be-7 <6.81E--02 0 OOE+OO 681E-02 K-40 3.75E-01 165E-01 190E-01 Sample ID: 434498 Sample Dates: 1 1 30/2017

2/6/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <6.39E-03 0 OOE+OO 6 39E-03 Cs-134 <8.58E-03 0 OOE+OO 8 SBE-03 Cs-137 <9.03E-03 0 OOE+OO 9 03E-03 Be-7 <4.94E-02 O.OOE+OO 4 94E-02 K-40 4.70E-01 1.49E-01 2.96E-02 Sample ID: 435144 Sample Oates: 2/6/2017
2/1312017 Nuclide Activity 2 Sigma Error MDA 1-131 <9.81E-03 O.OOE+OO 9.81E-03 Cs-134 <6.42E-03 O.OOE+OO 6.42E-03 Cs-137 <-9.36E-03 O.OOE+OO 9.36E-03 Be-7 <604E-02 o OOE+OO 6.04E-02 K-40 551E-01 1 BOE-01 1 50E-01 Sample ID: 435845 Sample Dates: 2/13/2017. 2/20/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <9 26E-03 O.OOE+OO 9 26E*03 Cs-134 <5 30E-03 0 OOE+OO 5.30E-03 Cs-137 <1.11E-02 0 QOE+OO 1 1 1E-02 Be-7 <4.77E-02 OOOE+OO 4 77E-02 K-40 1.60E-01 962E*02 1 OBE-01 Sample ID: 436297 Sample Dales: 2/20/2017.

2/27/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <8.83E-03 OOOE+OO 6 63E-03 Cs-134 <7.BOE-03 0 OOE+OO 7 SOE-03 Cs-137 <7 62E*03 0 OOE+OO 7 62E-03 Be-7 <4.54E-02 O.OOE+OO 4 54E-02 K-40 <1 94E-01 O.OOE+OO 1.94E-01 Sample ID: 436753 Sample Dates: 2/27/2017

3/6/2017 Nuclide Activity 2 Sigma Error MDA 1-1 31 <6 84E-03 O.OOE+OO 6 , 8 4E-0 3 Cs-134 <7 72E-03 O.OOE+OO 7 72E-03 Cs-137 <1 06E-02 O.OOE+OO 1.0SE-02 Be 7 <4 07E-02 O OOE+O O 4.07E-02 K-40 3 09E-01 1 34E-01 1 24E-01 Sample ID: 437624 Sample Dates: 3/6/2017
3/13/2017 Nuclide Activ i ty 2 Sigma Error MDA 1-131 <8.58E-03 0 OOE+O O 6 56E-03 Cs*134 <5.33E-03 0 OOE+OO 5 33E-03 Cs*137 <9.77E-03 0 OOE+OO 9 77E-03 Be-7 <4.75E-02 0 OOE+OO 4 75E-02 K-4 0 <2.21E-01 0 OOE+OO 2 21E-01 Report Generated@

3121/2018 14 30: 38 (@ EnRad Laboratories Appendix E

Page 33 of 93 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersville , North Carol i na 28078 OCONEE Radiological Environmental Monitoring Analysis Report'-2017 (Appendix E) Media Type: AIR RADIOIODINE Concentration (Activity):

pCl/m3 Sample Point 081 [ CONTROL -SE@ 9.33 miles J Sample ID: 438337 Sample Dales: 3/1312017 -3/20/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <8.23E-03 0.00E+OO 8.23E-03 Cs-134 <6.0SE-03 O.OOE+OO 6.0SE-03 Cs-137 <8.25E-03 O.OOE+OO 8.25E-03 Be-7 <5.76E-02 O.OOE+OO 5.76E-02 K-40 <2.26E-01 O.OOE+OO 2.26E-01 Sample ID: 438842 Sample Oates: 3/20/2017 -3/27/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <9.53E-03 O.OOE+OO 9.53E-03 Cs-134 <7 51E-03 O.OOE*OO 7 51E-03 Cs-137 <1 02E-02 O.OOE+OO 1 02E-02 Be-7 <3 59E-02 0.00E+OO 3 59E-02 K-40 <2 37E-01 O.OOE+OO 2.37E-01 Sample ID: 439224 Sample Dates: 3/27/2017 -413/2017 Nuclide Activity 2 Sigma Error MCA 1-131 <9 49E--0 3 O.OOE+OO 9.49E-03 Cs-134 <6 17E-03 OOOE+OO *s.17E-03 Cs-137 <1 11E-02 0 OOE+OO 111E-02 Be-7 <5.85E-02 0 OOE+OO 5.85E-02 K-40 3.05E-01 1 18E-01 2.95E-02 Sample 10: 440046 Sample Dates: 4/312017 -4/10/2017 Nuclide Activity 2 Sigma Error MOA 1-131 <9.92E-03 O.OOE+OO 9.92E-03 Cs-134 <7 24E-03 O.OOE*OO 7.24E-03 Cs-137 <6.45E*0 3 O.OOE+OO 6.45E-03 Be-7 <5.09E-0 2 O.OOE+OO 5.09E-02 K-40 <2 07E-01 0.00E+OO 2.07E-01 Sample ID: 440834 Sample Dales: 4/10/2017 -4/17/2017 Nuclide Activity 2 Sigma Error MOA 1-131 <1 04E-0 2 O.OOE+OO 1 04E-02 Cs-134 <3 96E-03 'O.OOE+OO 3.96E-03 Cs-137 <8 76E-03 O.OOE+O O 8.76E-03 Be-7 <5 65E-02 0.00E+OO 5.65E-02 K-40 5 39E-01 1 73E-01 127E-01 Sample ID: 441450 Sample Dates: 4/17/2017 -4/24/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <9.76E-0 3 0 OOE+OO 9.76E-03 Cs-134 <6 64E-03 O.OOE*OO 6.64E-03 Cs-137 <6.29E-03 0 OOE+OO 6.29E-03 Be-7 <2.81E-02 0 OOE+OO 2.81E-02 K-40 3.51E-01 1 23E-01 2 72E-02 Sample ID: 441899 Sample Dates: 4/2412017

5/1/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <9.83E-03 O.OOE+OO 9.B3E-03 Cs-134 <7 96E-03 O.OOE+OO 7 96E-03 Cs-137 <4 5BE-03 O.OOE+OO 4 SBE-03 Be-7 <4 35E-02 O.OOE+OO 4 35E-02 K-40 6.11E-01 1 87E-01 1 53E-01 Sample ID: 442360 Sample Dales: 5/112017.

518/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <8.58E-03 0 OOE+OO 8.SBE-03 Cs-134 <4.44E-03 0 OOE+OO 4.44E--03 Cs-137 <6.39E-03 OOOE+OO 6.39E--03 Be-7 <4 16E-02 O.OOE+OO 4. 16E-02 K-40 4.68E-01 1.44E-01 2 76E-02 Sample ID: 442903 Sample Dates: 518/2017. 5/15/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <8 96E-03 O.OOE+OO B 96E-03 Cs-134 <6 70E-03 O.OOE+OO 6 70E-03 Cs-137 <1 06E-02 0.00E+OO 1 06E-02 Be-7 <5 41E-02 O.OOE+OO 5.4 1 E-02 K-40 3 BSE-01 1 67E-01 194E-01 Sample ID: 443343 Sample Dates: 5/15/2017

5/22/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <1.06E-02 0 OOE+OO 1.06E-02 Cs-134 <5.BSE-03 0 OOE+OO 5.BSE-03 Cs-137 <7 26E-03 O.OOE+OO 7.26E-03 Be-7 <S.77E-02 O.OOE+OO 5.77E-02 K-40 3 18E-01 1.23E-01 3.0SE-02 Report Generated@

3/21/2018 14.30: 38 c f!@ EnRad Laboratories Appendix E -Page 34 of 93 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersville. North Carolina 28078 OCONEE Radiological Environmental Monitoring Analysis Report-2017 (Appendix E) Media Type: AIR RA01010DINE Concentrat i on (Activity)

pCl/m3 Sample Point 081 ( CONTROL -SE@ 9.33 miles] Sample 10: 443895 Sample Oates: 5122/2017

5/30/2017 Nuclide Activ i ty 2 Sigma Error MCA 1-131 <8.60E-03 0 OOE+OO 8.60E-03 Cs-134 <7.52E-03 O.OOE+OO 7 52E-0 3 Cs-137 <8.30E-03 O.OOE+OO 8.30E-03 Be-7 <5.44E-02 O.OOE+OO 5 44E-02 K-40 4.43E-01 151 E*01 1 26E-01 Sample ID: 444302 Sample Oates: 5/30/2017
6/5/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <7.78E-03 0 OOE+OO 7.78E-03 Cs-134 <6 03E-03 O.OO E+OO 6.03E-03 Cs-137 <1 18E-0 2 0 OOE+OO 118E-02 B e-7 <S.99E-02 0 OOE+OO 5.99E-02 K-40 2 64E-01 1.23E-01 1.03E-01 Sample 10: 445364 Sample Dates: 6/5/2017.

6/12/2017 Nuclide Activity 2 Sigma Error MOA 1-1 31 <9.01E-03 O.OOE+OO 9.01E-03 Cs-134 <6.36E-03 0.00E+OO 6.38E-03 Cs-1 37 <8.96E-03 O.OOE+OO 6 96E-0 3 B e-7 <5.09E-02 O.OOE+OO 5 09E-0 2 K-40 <2.00E-01 0.00E+OO 2 OOE-01 Sample 10: 446364 Sample Dates: 6/12/2017. 6/19/2017 Nuclide Activity 2 Sigma Error MOA 1-131 <7 97E-03 0 OOE+OO 7.97E-03 Cs-134 <5 10E-03 OOOE+OO 5 10E-03 Cs-137 <9 BOE-03 0 OOE+OO 9.BOE-03 Be-7 <5.0BE-02 OOOE+OO 508E-02 K-40 <215E-01 OOOE+OO 2 15E-0 1 Sample ID: 446862 Sample Dates: 6/1912017 -61 26/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <8.68E-03 O.OOE+OO 8 68E-03 Cs-134 <9 11E-03 O.OOE+OO 9 11E-03 Cs-137 <1.00E-02 O.OOE+OO 1 OOE-02 Be-7 <4 70E-02 0 OOE+OO 4 70E-02 K-40 1 28E-01 8 47E-02 9.70E-02 Sample ID: 447236 Sample Dates: 6/26/2017 -7/3/20 17 Nuclide Activity 2 Sigma Error MOA 1-131 <1.12E-02 0 OOE+OO 112E-02 Cs-134 <8.47E-03 0 OOE+OO 8.47E-03 Cs-137 <1.0SE-0 2 0 OOE+OO 1.0SE-02 Be-7 <5.67E-02 O.OOE+OO 5 67E-02 K-40 <2 51E-01 O.OOE+OO 2 51E-01 Sample ID: 447846 Sample Oates: 7/312017

7/10/2017 Nucl i de Activity 2 Sigma Error MOA 1-131 <7.49E-03 0 OOE+OO 7.49E-03 Cs-134 <6 82E-03 0 OOE+OO 6.82 E-03 Cs-137 <7 22E-03 0 OOE+OO 7.22 E-03 Be-7 <6.18E-02 0 OOE+OO 6.18E-0 2 K-40 1.07E-01 8.46E-02 1.13E-01 Sample 10: 448314 Sample Oates: 7/10/2017

-7 1 17/2017 Nuclide Activity 2 Sigma Error MOA i-13 1 <7.29E-03 O.OOE+OO 7 29E-03 Cs-134 <6.BOE-0 3 O.OOE+OO 6 BOE-03 Cs-137 <8 98E-03 O , OOE+OO 8.98E-03 Be-7 <4 22E-02 O.OOE+OO 4 22E-02 K-40 <2.20E-01 0 OOE+OO 2.20E-01 Sample ID: 448930 Sample Oates: 7/17/2017 -7/24/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <7 72E-03 0 OOE+OO 7.72E-03 C s-134 <3.67E-03 0 OOE+OO 3.67E-03 Cs-137 <8.73E-0 3 0 OOE+OO 8 73E-03 Be-7 <1.09E-02 O.OOE+OO 1 09E-02 K-40 1.42E-01 9 72E-02 1 23E-01 Sample ID: 449259 Sample Oates: 7/2412017 -7/31/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <7.40E-0 3 OOOE+OO 7.40E-03 Cs-134 <6.40E-03 0 OOE+OO 6.40E-03 Cs-137 <1.06E-02 OOOE+OO 1.06E-02 Be-7 <S.21E-02 0 OOE+OO S.21E-02 K--40 2 41E-01 114E-01 1.09E-01 Report Generated@ 3/21/2018 14: 30: 38 c (!@ EnRad Laborator ies Appendix E -Page 35 of 93 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersville. North Caro~na 28078 OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: AIR RADIOIOOINE Concentration (Activity)

pCl/m3 Sample Point 081 [ CONTROL -SE@ 9.33 miles) Sample ID: 449979 Sample Dates: 7/3112017

8f7/2017 Nuclide Activity 2 Sigma Error MCA 1-131 <1.02E-02 O.OOE+OO 1.02E-02 Cs-134 <6.92E-03 O.OOE+OO 6.92E-03 Cs-137 <1.11E*02 O.OOE+OO 1.11E-02 Be-7 <5.95E-02 O.OOE+OO 5.95E-02 K-40 1.76E-01 116E-01 1.54E-01 Sample ID: 450246 Sample Dates: 81712017 -811412017 Nuclide Activity 2 Sigma Error MCA 1-131 <9.04E-03 O.OOE+OO 9.04E-03 Cs-1 34 <5.13E-03 O.OOE+OO 5.13E-03 Cs-137 <1.07E-02 0.00E+OO 1.07E-02 Be-7 <7.29E-02 O.OOE+OO 7.29E-02 K-40 <2.28E-01 O.OOE+OO 2.28E-01 Sample ID: 450763 Sample Dates: 811412017

-812112017 Nuclide Activity 2 Sigma Error MCA 1-131 <7.70E-03 O.OOE+OO 7 70E-03 Cs-1~ <7.03E-03 O.OOE+OO 7.03E-03 Cs-137 <8.73E-03 OOOE+OO 8.73E-03 Be-7 <6.37E-02 O.OOE+OO 6.37E-02 K-40 <2.27E-01 O.OOE+OO 2.27E-01 Sample ID: 451227 Sample Dates: 8/21/2017

8/2812017 Nuclide Activity 2 Sigma Error MDA 1-131 <6.74E-03 O.OOE+OO 6.74E-03 Cs-134 <8.33E-03 O.OOE+OO B.33E-03 Cs-137 <9.42E-03 O.OOE+OO 9.42E-03 Be-7 <5.79E*02 0.00E+OO 5.79E-02 K-40 <2.23E-01 O.OOE+OO 2.23E*01 Sample ID: 451570 Sample Dates: 8/28/2017
9/5/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <8.0SE-03 O.OOE+OO 8.0SE-03 Cs-134 <7.45E-03 O.OOE+OO 7.45E-03 Cs-137 <9.25E-03 0.00E+OO 925E-03 Be-7 <4.97E-02 OOOE+OO 4.97E-0 2 K-40 1.47E-01 7.71E-02 2 66E-02 Sample ID: 452404 Sample Dates: 915/2017
9/1112017 Nuclide Activity 2 Sigma Error MDA 1-131 <114E-02 O.OOE+OO 1.14E-02 Cs-134 <B.73E-03 0.00E+OO 8.73E-03 Cs-137 <B.68E-03 O.OOE+OO 8.68E-03 Be-7 <7 OOE-02 0.00E+OO 7.00E-02 K-40 <2 3BE-01 O.OOE+OO 2.38E-01 Sample ID: 452B23 Sample Dates: 9111/2017
9/18/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <9 23E-03 O.OOE+OO 9 23E-03 Cs-134 <B 55E-03 O.OOE+OO 8 SSE-03 Cs-137 <1 06E-02 0 OOE+OO 1 06E-02 Be-7 <5.95E-02 0 OOE+OO 595E-02 K-40 <2 24E-01 0 OOE+OO 2 24E-01 Sample 10: 452978 Sample Oates: 9/18/2017
9/25/2017 Nuclide Activity 2 Sigma Error MOA 1-131 <1.00E-02 0 OOE+OO 1.00E-02 Cs-134 <1.0SE-02 0.00E+OO 1 OSE-02 Cs-137 <8 07E-03 O.OOE+OO 8.07E-03 Be-7 <4 68E-02 O.OOE+OO 4.68E-02 K-40 1 97E-01 1 22E-01 1 54E-01 Sample ID: 453482 Sample Dates: 9/2512017.

10/2/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <1 76E-02 0 OOE+OO 1 76E-02 Cs-134 <2 09E-02 OOOE+OO 2 09E-02 Cs-137 <1 38E-02 OOOE+OO 1 38E-02 Be-7 <6.29E-02 0 OOE+OO 6 29E-02 K-40 2.78E-01 1 54E-01 1 89E-0 1 Sample ID: 454257 Sample Dates: 10/2/2017. 10/9/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <1.39E-02 0.00E+OO 1 39E-02 Cs-134 <1 42E-02 O.OOE+OO 1.42E-02 Cs-137 <1 69E-02 O.OOE+OO 1.69E-02 Be-7 <8 79E-02 0.00E+OO 8 79E-02 K-40 1 62E-01 2 70E-01 2 02E-01 Report Generated @3/21/2018 14*30*38 <li@ EnRad Laboratories Appendix E

Page 36 of 93 Duke Energy Annual Report
Append x E 13339 Hagers Ferry Road Huntersville , North Carolina 28078 OCONEE Radiological Environmental Monitoring Analysis Report* 2017 (Appendix E) Media Type: AIR RADIOIODINE Concentration (Activity):

pCi/m3 Sample Point 081 [ CONTROL -SE@ 9.33 miles) Sample ID: 455114 Sample Datea: 101912017

10/16/2017 Nuclide Activity 2 Sigma Error MOA 1-131 <2.14E-02 O.OOE+OO 2.14E-02 Cs-134 <1.84E-02 O.OOE+OO 1 84E*02 Cs-137 <1.61E-02 O.OOE+OO 161E-02 8e-7 <1.26E-01 0 OOE+OO 126E-01 K-40 <3.BOE-01 O.OOE+OO 3.BOE-01 Sample ID: 455450 Sample Oates: 10/1 6/2017
10/2312017 Nuclide Activity 2 Sigma Error MDA 1-131 <2.49E-02 0 OOE+OO 2 49E-02 Cs-134 <1.25E-02 OOOE+OO 1 25E-02 Cs-137 <1.78E-02 OOOE+OO 1 78E-0 2 Be-7 <1.34E-0 1 OOOE+OO 134E-01 K-40 5.20E-01 1.93E-01 1 92E-01 Sample ID: 456080 Sample Dates: 1012312017

-1 0/3012017 Nuclide Activity 2 Sigma Error MDA 1-131 <2.48E-02 0 OOE+OO 2.48E , 02 Cs-134 <1.45E-02" 0 OOE+OO 1 45E-02 Cs-137 <1.81E-02 O.OOE+OO 1 81E-02 Be-7 <1.16E-01 O.OOE+OO 116E-01 K-40 3.76E-01 169E-01 1 84E-01 Sample ID: 461446 Sample Dates: 10/30/2017

11/6/2017 Nuclide Act ivity 2 Sigma Error MDA 1-131 <2.39E-02 O.OOE+OO 2 39E-02 Cs-134 <1.69E-02 O.OOE+OO 1 69E-02 Cs-137 <1.54E-02 O.OOE+OO 1 54E-02 Be-7 <115E-01 0 OOE+OO 11 5E-01 K-40 S.10E-01 166E-01 177E-01 Sample ID: 462002 Sample Dates: 11/6/2017

-11/13/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <2.59E-02 0 OOE+OO 2.59E-02 Cs-134 <1.64E-02 0 OOE+OO 164E-02 Cs-137 <2 01E-02 0 OOE+OO 2 01E-0 2 Be-7 <1 30E-01 0 OOE+OO 1.30E-01 K-40 5 66E-01 1 76E-01 3 57E-02 Sample ID: 462641 Sample Dates: 11/13/2017 -11120/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <2 18E-02 O.OOE+OO 2 18E*02 Cs-134 <2 14E-02 O.OOE+OO 2 14E-02 Cs-137 <1 73E-02 O.OOE+OO 1 73E-02 Be-7 <1.24E-01 O.OOE+OO 1 24E 0 1 K-40 4.26E-01 1 94E-01 2 35E*0 1 Sample ID: 463130 Sample Dates: 11/20/2017 -11/27/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <1 96E-02 O.OOE+OO 1 96E*02 Cs-134 <1 36E-02 O.OOE+OO 1 , 36E*02 Cs-137 <1 75E-02 0 OOE+OO 1 75E-02 Be-7 <1 09E-01 0 OOE+OO 1 OSE-01 K-40 <l.93E-01 2 16E-01 2.66E-01 Samp l e ID: 463540 Sample Dates: 1112712017, 12/4/2017 Nuclide Activity 2 Sigma Error MOA 1-131 <2.51E-02 0 OOE+OO 2 51E-02 Cs-134 <1.SOE-02 O.OOE+OO 1 SOE-02 Cs-137 <1.77E-02 O.OOE+OO 1 77E*02 Be , 7 <1.21 E-01 0.00E+OO 121E-0 1 K-40 <3.98E-01 O.OOE+OO 3 96E-01 Sample ID: 464181 Sample Oates: 12/4/2017 -1 2/11/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <1.97E*02 O.OOE+OO 1 97E-02 Cs-134 <1.69E-02 O.OOE+OO 1.69E-02 Cs-137 <1.31E-02 O.OOE+OO 1 31E-02 Be-7 <1.16E-01 O.OOE+OO 116E*01 K-40 5.07E-01 2 OOE-01 2.17E-01 Sample ID: 464738 Sample Oates: 12/11/2017 -12/18/2017 Nuclide Activity 2 S i gma Error MDA f-131 <2.20E-02 O.OOE+OO 2 20E-02 Cs-134 <1.BSE-02 0 OOE+OO 1 85E*02 Cs-137 <1.81E-02 O.OOE+OO 1 6 1 E-02 Be-7 <9.30E-02 0.00E+OO 930E-02 K-40 5.12E-01 1 98E*01 212E 0 1 Report Generated@ 3/21/2018 14.30 38 En@ EnRad laborato ries Appendix E

Page 37 of 93 Duke Energy Annual Report
Appendix E 13339 Hagers Ferry Road Huntersvl l*e. North Carof1na 28078 OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: AIR RADIOlODINE Concentration (Activity):

pCilml Sample Point 081 [CONTROL* SE@ 9.33 miles] Sample ID: 485004 Sample Dates: 12/18/2017 -12/2612017 Nuclide Activity 2 Sigma Error MDA 1-1 31 <3 2 1E-02 OOOE+OO 3 21E-02 Cs-134 <1 81E-02 OOOE+OO 1.81 E-02 Cs-137 <1 3 0E-02 O OOE+OO 1 30E-02 Be-7 <116E-01 O OOE+OO 116E-01 K-40 4 34E-01 1 74E-01 190E 01 Sample ID: 465240 Sample Dates: 12/2612017 -1/2/2018 Nuclide Activity 2 Sigma Error MDA 1-1 31 <2.40E-02 O.OOE+OO 2.40E-02 Cs-134 <2.12E-02 O.OOE+OO 2.12E-02 Cs-137 <1.40E-02 O.OOE+OO 1 40E-02 Be-7 <1 SOE-01 O.OOE+OO 1.SOE-01 K-40 4.01E-01 2 14E-01 2 92E-01 Sample Point 084 [INDICATOR

NNE @ 2.58 miles) Sample ID: 4311t49 Sample Dates: 12/27/2016

-1/3/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <119E-02 O.OOE+OO 119E-02 Cs-134 <1.43E-03 0 OOE+OO 1 43E-03 Cs-137 <8.59E-03 0 OOE+OO 8 59E-03 Be-7 <6.4 2E-02 0 OOE+OO 642E-0 2 K-40 2.98E-01 1.32E-01 130E 01 Sample ID: 432250 Sample Dates: 1/3/2017 -1/9/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <9.79E-03 O.OOE+OO 9.79E-03 Cs-134 <6.26E-03 0.00E+OO 6.26E-03 Cs-137 <1.0BE-02 O.OOE+OO 1 OBE-02 Be-7 <3.42E-02 O.OOE+OO 3.42E*02 K-40 4.60E-01 157E-01 3 37E-0 2 Sample ID: 432944 Sample Dates: 1/9/2017 -1/16/2017 Nuclide Act i vity 2 S igma Error MDA 1-131 <7 53E-03 O.OOE+OO 7 5 3 E-03 Cs-134 <5 36E-03 O.DqE+OO 5 36E-03 Cs-137 <1 6BE-03 O.OOE+OO 1 6BE-03 Be-7 <2 93E-02 OOOE+OO 2 9 E-02 K-40 3 57E-01 145E-01 146E-01 Sample ID: 433340 Sample Dates: 1 (1612017

1/23/2017 Nuclide Activity 2 Sigma Error MDA 1-13 1 <91BE-03 OOOE+OO 9 18E-0 3 Cs-134 <7 43E-03 OOOE+OO 7 4 3 E-0 3 Cs-137 <1 07E-02 0 OOE+OO 1.07E-02 Be-7 <4 78E-02 0 OOE+OO 4.78E-02 K-40 4 83E-01 1.60E-01 125E-01 Sample ID: 433759 Sample Dates: 1/23/2017.

1/30/2017 Nuclide Activity 2 Sigma Error MOA* 1-13 1 <1 OOE-02 O.OOE*OO 1 06E-02 Cs-134 <6 9BE-03 O.OOE+OO 6 98E-03 Cs-137 <7 39E-03 O.OOE*OO 7 39E-03 Be-7 <7 24E-02 0 OOE+OO 7 24 E-02 K-40 3 48E-01 1 39E-01 1 34E*01 Sample JD: 434499 Sample Dates: 113012017 -2/612017 Nuclide Activity 2 Sigma Error MDA 1-131 <4 53E-03 0 OOE+OO 4 53E-03 Cs-134 <3 75E-03 0 OOE+OO 3.75E-03 Cs-137 <4.32E-03 OOOE+OO 4 32E-03 Be-7 <2 58E-02 0 OOE+OO 2 58E-02 K-40 4 BO E-01 9 OOE-02 6.38E-02 Sample ID: 435145 Sample Dates: 2/6/2017 -2/1312017 Nuclide Activity 2 Sigma Error MDA 1-131 <9.97E-03 0.00l::+00 9.97E-03 Cs-134 <6 SSE-03 0.00E+OO 6 55E-03 Cs-137 <8 15E-03 0 OOE+OO 8 15E-03 Be-7 <6 BSE-02 O.OOE+OO 6 65E-02 K-40 4 82E-01 148E-01 2 84E-02 Sample ID: 435846 Sample Dates: 2/1312017. 2/20/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <1 09E-02 0 OOE+OO 1 09E*02 Cs-134 <8.09E-03 0 OOE+OO 8 09E-03 Cs-137 <8 78E , 03 0 OOE+OO 8 78E-03 Be-7 <6.BSE-02 0 OOE+OO 6.85E-0 2 K-40 1.66E-01 1 03E-01 1 19E-01 Report Generated@ 3/2112018 14: 30: 38 c En[) EnRad Laboratories Appendix E Page 38 of 93 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersville , North Carol i na 28078 OCONEE Radiological Environmental Monitorin~fAnalysis Report* 2017 (Appendix E) Media Type: AIR RADIOIODINE Concentration (Activity)

pCi/m3 Sample Point 084 [ INDICATOR

-NNE@ 2.58 miles] Sample ID: 436298 Sample Dates: 2/20/2017 -2/2712017 Nuclide Activity 2 Sigma Error MOA 1-131 <7.34E-03 O.OOE+OO 7 34E-03 Cs-134 <6.72E-03 O.OOE+OO 6.72E-03 Cs-137 <1.03E-02 0.00E+OO 1.03E-02 Be-7 <S.41E-02 O.OOE+OO 5.41E-02 K-40 <2.23E-01 O.OOE+OO 2.23E-01 Sample ID: 436754 Sample Dates: 2/2712017 -316/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <8.31E-03 O.OOE+OO 8.31E-03 C s-134 <6.73E-03 O.O O E+OO 6.73E-03 Cs-137 <1.06E*02 O.OOE+OO 1.06E-02 Be-7 <5.78 E-0 2 O.O O E+OO 5.78E-02 K-40 <1.62E-0 1 0.0 0 E+OO 1.62E-01 Sample ID: 437625 Sample Dates: 316/2017 -311312017 Nuclide Activity 2 Sigma Error MDA 1-131 <8.84E-0 3 O.OO E+OO 6.64E-03 Ca-134 <6.57E-03 0 OOE+OO 6.57E-03 ~-137 <1.17E-0 2 0 OOE+OO 117E-02 Be-7 <4.03E-0 2 0 OOE+OO 4.03E-02 K-40 1.25E-01 1 12E-01 1.67E-01 Sample ID: 438338 Sample Dates: 3/13/2017 -312012017 Nuclide Activity 2 Sigma Error MDA 1-131 <9 07E*03 0 OOE+OO 9.07E-03 c~-134 <6 60E*03 O.OOE+OO 6.BOE-03 Cs-137 <1 15E-0 2 0 OOE+OO 1.15E-02 Be-7 <4 84E-0 2 O.OOE+OO 4 84E-02 K-40 <1.74E-01 O.OOE+OO 1 74E*01 Sample ID: 438843 Sample Dates: 3/2012017

3127/2017 Nuclide Activity 2 Sigma Error MOA 1-131 <1.17E-02 0 OOE+OO 1.17E-02 Cs-134 <8.32E*03 O.OO E+OO 8 32E-03 Cs-137 <7.82E-03 O.OO E+OO 7.62E-03 Be-7 <5.56E-02 O.OO E+OO 5.56E-02 K-40 2.96E-01 1 17E*01 2 97E-02 Sample ID: 439225 Sample Dates: 312712017.

4/312017 Nuclide Activity 2 Sigma Error MDA 1-131 <7.96E-03 OOOE+OO 7.96E-03 Cs-134 <5.82E-03 0 OOE+OO 582E-03 Cs-137 <1 OSE-02 0 OOE+OO 1.0SE-02 Be-7 <6 26E-02 OOOE+O O 6.26E-02 K-40 <2 37E-01 0 OOE+OO 2.37E-01 Sample ID: 440047 Sample Dates: 4/312017 -411012017 Nuclide Activity 2 Sigma Error MDA 1-131 <7 99E-03 O.OOE+OO 7 99E-03 Cs-134 <5 76E-03 0.00E+OO 5 76E-03 Cs-137 <1 OBE-02 0 OOE+OO 1.0BE-02 Be-7 <5 07E-02 O.OOE+OO 5 07E-02 K-40 <2 40E-01 0.00E+OO 2 40E*01 Sample ID: 440635 Sample Dates: 4/1012017 -411712017 Nuclide Activity 2 Sigma Error MDA 1-131 <8.62E-03 O O OE+OO 8 62E-03 Cs-134 <9.07E-03 0.00E+OO 9 07E-03 Cs-137 <8.16E-03 O.OOE+OO 8 16E-03 Be-7 <6.34E-0 2 0 OOE+OO 6.34E-02 K-40 3.24E-01 1 39E-01 1.45E-01 Sample ID: 441451 Sample Dates: 4117/2017 -4124/2017 Nuclide Activity 2 Sigma Error MOA 1-131 <7.40E-03 0 OOE+OO 7.40E-03 Cs-134 <5 9 1 E-03 0 OOE+OO 5.91E-03 Cs-137 <6 59E*03 0.00E+OO 6.59E-03 Be-7 <4 72E*0 2 O.OOE+OO 4.72E-02 K-40 4 27E-0 1 1 47E-01 1.14E-01 Sample 10: 441900 Sample Oates: 4124/2017 -51112017 Nuclide Activity 2 Sigma Error MDA 1-13 1 <a77E-03 O.OOE+OO 6 77E-03 Cs-134 <4 7 4E-03 O.OOE+OO 4 74E-03 Cs-137 <8 9 6E-03 0 OOE+OO 8.96E-03 Be-7 <4.8 9E-02 O O OE+OO 4 89E-02 K-40 3.6 7E-01 1.46E*O 1 43E-01 Report Generated@ 3/21/2018 14: 30: 38 c (!W) EnRad Laboratories Appendix E

Page 39 of 92 Duke Ene r gy Annual Report -Append i x E 13339 Hagers Ferry Road Huntersville North Carolina 28078 OCONEE Radiological Environmental Moriltoring Analysis Report. 2017 (Appendix E) Media Type: AIR RADIOIODINE Concentration (Activity)

pCi/m3 Sample Po i nt 084 [INDICATOR. NNE@ 2.58 miles] Sample 10: 442361 S a mple Dates: 5/1/2017 . 5/812017 Nuclide Activity 2 Sigma Error MDA 1-131 <7 78E-03 OOO E+OO 7 78E-03 Cs-134 <7 21E-03 0 OOE+OO 7.2 1 E-03 Cs-137 <9.56E-03 0 OOE+OO 9.56E-03 Be-7 <5.77E-0 2 O.OOE+OO 5 77E-02 K-40 4.85E-01 1.71E-01 1 62E 0 1 Sample 10: 442904 Sample Dates: 5/8/2017

5/1512017 Nuclide Act i vity 2 Sigma Error MDA 1-13 1 <7 93E-0 3 O.OOE+OO 7 93E-03 C s-134 <6.30E-03 O.OOE+OO 6 30 E-03 Cs-137 <9.47E-0 3 O.OO E+OO 9 47E-03 Be-7 <61 9 E-02 O.OOE+OO 6 19E-02 K-40 3.69 E-0 1 1 27E-0 1 2 7 8 E-0 2 Sample ID: 443344 Sample Oates: 511512017

-5/2212017 Nuclide Activity 2 S i gma Error MDA 1-131 <8 99E-03 0 OOE+OO 8 9 9 E-03 Cs-134 <8_99E-03 0 OOE+OO 8 , 99E-03 Cs-137 <7.12E-03 0 OOE+OO 7.12E-03 Be-7 <5.48E-02 OOOE+OO 5.48E-02 K-40 4 43E*01 1.5 2 E-01 1.23 E-01 Sample 10: 443896 Sample Dates: 5122/2017 -5/30/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <9.73E-03 O.OOE+OO 9 73E-03 Cs-134 <8.02E-03 O.OOE+OO 8 02E-03 Cs-137 <6.94E-03 O.OOE+OO 6 94E-0 3 Be-7 <3.75E-0 2 O.OOE+OO 3 75E-02 K-40 3.00E-01 1 OSE-01 2 46E-02 Sample ID: 444303 Sample Dates: 5130/2017

6/5/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <8 30E-03 0 OOE+OO 8 JOE-03 C s-134 <9 26E-03 0 OOE+OO 9.26E-03 Cs-137 <1 30E-02 0 OOE+OO 1 30E-02 Be-7 <4.81E-02 0 OOE+OO 4 81E-02 K-40 2 19E-01 114E-01 1.0SE-01 Sample ID: 445365 Sample Dates: 615/2017.

611212017 Nuclide Activity 2 Sigma Error MOA 1-131 <7.0BE-03 O.OOE+OO 7 08E-03 Cs-134 <8.16E-03 O.OOE+OO 8 16E-03 C s-137 <1.20E-0 2 O.OOE+OO 1 20E-02 Be-7 <6.5 2E-02 0 OOE+OO 6 52E-02 K-40 1 38 E-01 884E-02 962E*02 Sample 10: 446365 Sample Dates: 8/12/2017 -6/1912017 Nuclide Activity 2 Sigma Error MOA 1-131 <9 19E*03 0 OO E+OO 919E*03 Cs-134 <9 09E*03 OOOE+OO 9.09E*03 Cs-137 <9 98E-03 0 OOE+OO 9 98E*03 B&-7 <4 23E*02 0 OOE+OO 4.23E-02 K-4 0 <2 37 E.-01 0 OOE+OO 2.37E*01 Sample ID: 446863 Sample Dates: 6119/2017 -6/26/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <9.95E-03 O.OOE+OO 9 95E-03 C s-134 <7 13E-03 O.OOE+OO 7 13E*03 Cs-137 <1.26E-02 OOOE+OO 1 26E-02 Be-7 <6.4 7E-02 O.OOE+OO 6 47E-02 K-40 <2.3 1 E-01 O.OOE+OO 2 31E-01 Sample ID: 447237 Sample Dates: 6/26/2017 -71312017 Nuclide Activity 2 Sigma Error MDA 1-1 31 <7 35E-03 0 OOE+OO 7 35E-03 Cs-134 <6 26E-0 3 0 OOE+OO 6.26E-03 Cs-137 <83 6 E*0 3 O.OOE+OO 8.36E-03 Be-7 <5.50E-02 O.OOE+OO 5.SOE-0 2 K-40 <1 77E*01 O.OOE+OO 1 77E-0 1 Sample ID: 447847 Sample Dates: 713/2017. 7/10/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <9.43E-03 O.OOE+OO 9.43E 03 Cs-134 <8.1 6E-03 O.OOE+OO 8 16E-03 Cs-137 <1.01 E-02 O.OOE+OO 1 01E-02 B 7 <6.17E-02 O.OO E+OO 6 17E-02 K-4 0 2.26E-0 1 1 08E-01 9 26E-02 Report Generated@ 3/21/2018 14: 30: 38 c[ID EnRad Laborator i es Appendix E -Page 40 of 93 Duke Energy Annua l Report -Appendix E 13339 Hagers Ferry Road Huntersville. North Carol i na 28078 OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 Sample Point 084 [INDICATOR* NNE@ 2.58 miles] Sample ID: 448315 Sample Dates: 7/10/2017. 7/17/2017 Nucllde Activity 2 Sigma Error MOA 1-131 <1 OOE-02 O.OOE+OO 1.00E-02 Cs-134 <1.01E-02 0 OOE+OO 1 01E-02 Cs-137 <8.02E-03 0 OOE+OO 8.02E-03 Be-7 <3.21E-02 0 OOE+OO 3.21E-02 K-40 1.43E-01 9 06E-02 9.68E-02 Sample ID: 448931 Sample Dates: 7/17/2017. 7/24/2017 Nuclide Activity 2 Sigma Error MOA 1-131 <9.96E-03 0 OOE+OO 9 96E-03 Cs-134 <6.52E-03 0 OOE+OO 6.52E-03 Cs-137 <1. 17E-02 0 OOE+OO 1.17E-02 Be-7 <5.22E-02 OOOE+OO 5 22E*02 K-40 1 93E-01 1.15E-01 1 37E-01 Sample ID: 449260 Sample Dates: 7/24/2017. 7/31/2017 Nuclide Activity 2 Sigma Error MOA 1-131 <7 06E-03 0 OOE+OO 7 06E-03 Cs-134 <7 52E-03 O.OOE+OO 7 52E-03 Cs-137 <1 10E-02 O.OOE+OO 110E-02 Be-7 <7 16E-02 O.OOE+OO 7 16E-02 K-40 <2 25E-01 O.OOE+OO 2 25E-01 Sample ID: 449980 Sample Oates: 7/31/2017

817/2017 Nuclide Activity 2 Sigma Error MOA 1-131 <9.67E-03 O.OOE+OO 9.87E-03 Cs-134 <6.43E-03 O.OOE+OO 6.43E-03 Cs-137 <1.06E-02 O.OOE+OO 1 06E-02 Be-7 <5.63E-02 O.OOE+OO 5.63E-02 K-'10 1.00E-01 9 39E-02 3.03E-02 Sample ID: 450247 Sample Datea: 8f7/2017.

8/14/2017 Nuclide Activity 2 Sigma Error MOA 1-131 <8.47E-03 OOOE+OO 8.47E-03 Cs-134 <7 91E-03 OOOE+OO 7 91E-03 Cs-137 <9.81E-03 0 OOE+OO 9.81E-03 Be-7 <5.45E-02 0 OOE+OO 5.45E-02 K-40 <1.90E-01 0 OOE+OO 1 SOE-01 Sample ID: 450764 Sample Dates: 8/14/2017. 8/21/2017 Nucllde Activity 2 Sigma Error MDA 1-131 <1 04E-02 O.OOE+OO 1 04E-02 Cs-134 <5 65E-03 O.OOE+OO 585E-03 Cs-137 <1 07E-02 O.OOE+OO 1 07E-02 Be-7 <5 22E-02 O.OOE+OO 5 22E-0 2 K-40 164E-01 9 93E 02 1 OSE-0 1 Sample ID: 451228 Sample Oates: 8/2112017 -8/28/2017 Nuclide Activity 2 Sigma Error MOA 1-131 <8.55E-03 O.OOE+OO 8.SSE-0 3 Cs-134 <6.42E-03 OOOE+OO 6.42E-03 Cs-137 <8.58E-03 O.OOE+OO 8.58E-0 3 Be-7 <4.73E-02 0 OOE+OO 4.73E 02 K-40 <2 30E-01 OOOE+OO 2.30E*0 1 Sample ID: 451571 Sample Dates: 8/2812017

9/512017 Nucllde Activity 2 Sigma Error MOA 1-131 <7 36E-03 0 OOE+OO 7 36E-03 Cs-134 <6 69E-03 OOOE+OO 669E*0 3 Cs-137 <9 85E-03 0 OOE+OO 9 85E-03 Be-7 <4 83E-02 0 OOE+OO 4 83E-0 2 K-40 192E-01 9.65E-02 1 OOE 0 1 Sample ID: 452405 Sample Oates: 915/2017.

9/11/2017 Nucllde Activity 2 Sigma Error MDA 1-131 <8 OOE-03 O.OOE+OO 890E*03 Cs-134 <5.35E-03 O.OOE+OO 5 35E-0 3 Cs-137 <1 14E-02 O.OOE+OO 114E 02 Be-7 <6 51 E-02 O.OOE+OO 6.51E-02 K-40 <2.72E-01 O.OOE+OO 2 72E-01 Sample ID: 452824 Sample Dates: 9/11/2017

911812017 Nuclide Activity 2 Sigma Error MD.A 1-131 <9.20E-03 OOOE+OO 9.20E*03 Cs-134 <6 96E-03 0 OOE+OO 6.96E-03 Cs-137 <931E-03 0 OOE+OO 9 31E*03 Be-7 <511E-02 0 OOE+OO 511E 02 K-'10 <2 09E-01 O.OOE+OO 2 09E-01 Report Generated@

3/21/2018 14*30: 38 (E!ID EnRad Laboratories Appendix E

Page 41 of 93 Duke Energy Annual Report
Appendix E 13339 Hagers Ferry Road Huntersville. North Carolina 28078 OCONEE Radiological Environmental Monitoring Analysis Report
2017 (Appendix E) Media Type: AIR RADIOIODINE Concentration (Activity):

pCi/m3 Sample Point 084 [INDICATOR* NNE@ 2.58 miles] Sample 10: 452979 Sample Oatea: 9/18/2017. 9/25/2017 Nuclide Act ivity 2 Sigma Error MOA 1-131 <8.49E-03 O.OOE+OO 8 49E-03 Cs-134 <9.42E-03 O.OOE+OO 9 42E-03 Cs-137 <7.21E-03 0.00E+OO 7 21E-03 Be-7 <6.1 6E-02 O.OOE+OO 6 16E-02 K-40 <2 32E-01 O.OOE+OO 2.32E-01 Sample 10: 463483 Sample Oates: 9/2512017

10/2/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <1 53E-02 0 OO E+OO 1.53E-02 Cs-134 <1 89E-02 0 OOE+OO 1.89E-02 Cs-137 <1 52E-02 0 OOE+OO 1 52E-02 Be-7 <1 03E-01 0 OOE+OO 1.03E*01 K-40 351E-01 171E-01 210E-01 Sample ID: 454258 Sample Dates: 10/2/2017

-10/9/2017 Nuclide Activity 2 Sigma Error MCA 1-131 <1.73E-02 O.OOE+OO 1 73E-02 Cs-134 <1.SOE-02 O.OOE+OO 1.60E-02 Cs-137 <1.44E-02 O.OOE+OO 1 44E-02 Be-7 <1.01E-01 O.OOE+OO 1 01E-01 K-40 2 17E-01 1 46E-01 2 03E-01 Sample ID: 455115 Sample Dates: 10/9/2017 -10/16/2017 Nuclide Activity 2 Sigma Error MCA 1-13 1 <1.91E-02 0 OO E+OO 1 91E-02 Cs-134 <1 69E-02 O.OOE+OO 1 69E-02 Cs-137 <1 68E-02 O OOE+OO 1.68E-02 Be-7 <1 OSE-01 0 OOE+OO 1.06E-01 K-40 1 70E-01 1 38E-01 2 02E-01 Sample ID: 465451 Sample Dates: 10/16/2017 -10/23/2017 Nuclide Activity 2 S igma Error MDA 1-131 <2.41E-02 0 OOE+OO 2.41E-02 Cs-134 <1 52E-02 OOOE+OO 1.52E-02 Cs-137 <1 79E-02 O.OOE+OO 1 79E-02 Be-7 <1.13E-01 0.00E+OO 1 13E-01 K-40 5 13E-01 1.79E-0 1 1 39E-01 Sample ID: 456081 Sample Oates: 10/23/2017 -10/30/2017 Nuclide Activity 2 Sigma Error MCA 1-131 <1.97E-02 0 OOE+OO 1 97E-02 Cs-134 <1 27E-02 0.00E+OO 1 27E-02 Cs-137 <1 71E-02 O.OOE+OO 1 71E-02 Be-7 <1.42E-01 0 OOE+OO 1 42E-01 K-40 5.70E-01 1 78E-01 3.51E*02 Sample ID: 461447 Sample Oates: 10/30/2017 -11/6/2017 Nuclide Activ ity 2 Sigma Error MOA 1-131 <2.11E-02 0.00E+OO 2.11E-02 Cs-134 <1.55E-02 0.00E+OO 1.SSE-02 Cs-137 <1.78E-02 O.OOE+OO 1 78E-02 Be-7 <1.29E-01 O.OOE+OO 129E-01 K-40 4.63E-01 2 OSE-01 2 56E-01 Sample ID: 462003 Sample Dates: 11/6/2017 -11/13/2017 Nuclide Activity 2 Sigma Error MOA 1-131 <2.26E-0 2 O.OOE+OO 2 26E-02 Cs-134 <1.85E-02 O.OOE+OO 1.85E-02 Cs-137 <1.64E-02 O OOE+OO 1.64E-02 Be-7 <1.25E-01 0 OOE+OO 125E-01 K-40 4.49E-01 1.83E-01 1.89E-01 Sample ID: 462642 Sample Dates: 11/13/2017 -11/20/2017 Nuclide Activity 2 Sigma Error MCA 1-131 <2.0SE-02 0.00E+OO 2.0SE-02 Cs-134 <1.34E-02 O.OOE+OO 1 34E-02 Cs-137 <1.86E-02 O.OOE+OO 1.86E-02 Be-7 <1.18E-01 O.OOE+OO 118E-01 K-40 3.95E-01 1 45E-01 3 45E-02 Sample ID: 463131 Sample Dates: 11/20/2017 -11/27/2017 Nuclide Activ ity 2 Sigma Error MCA 1-131 <2 OBE-02 O.OOE+OO 2 OBE-02 Cs-134 <1.61E-02 OOOE+OO 161E-02 Cs-137 <1.60E-02 0 OOE+OO 1 SOE-02 Be-7 <1.28E-01 O OO E+OO 1.28E-01 K-40 4.27E-01 2.0 BE-01 2.68E-01 Report Generated@ 3/21/2018 14*30: 38 C E!~ EnRad Laboratories Appendix E -Page 42 of 93 Duke Energy Annual Report -Append i x E 13339 Hagers Ferry Road Huntersville, North Carolina 28078 OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: AIR RADIOIODINE Concentration (Activity)

pCl/m3 Sample Point 084 [INDICATOR*

NNE@ 2.58 miles J Sample ID: 463541 Sample Date s: 11/27 12 017 -121 4/2017 Nuclide Activity 2 Sigma Error MOA 1-131 <2.38E-02 0 OOE+OO 2 38E*02 Cs-134 <1 , 85E-02 0 OOE+OO .85E-02 Cs-137 <1 52E-02 0 OOE+O O 1.52E-0 2 Be-7 <1.21E-01 OOOE+OO 121E*01 K-40 3 98E-01 1.67E-01 1.69E*01 Sample ID: 464182 Sample Dates: 121412017 -1 2/11/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <216E-02 OOOE+OO 2 16E-02 Cs-134 <1 37E-02 OOOE+OO 1 37E*02 Cs-137 <1.81E-02 0 OOE+OO 1 81E-02 Be-7 2 34E-02 6 91E-02 1 22E-01 K-40 8 52E-01 2 32E 01 1 55E-01 Sample ID: 464739 Sample Oates: 12/1112017 -12/18/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <2 06E-02 O.OOE+OO 2 06E-02 Cs-134 <1 85E-02 O.OOE+OO 1 85E-02 Cs-137 <2 06E-02 O.OOE+OO 2 06E-02 B e-7 <1 23E-01 O.OOE+OO 1 23E-0 1 K-40 4.45E-01 1 99E-0 1 242E-01 Sample ID: 465005 Sample Dates: 1211812017

12/26/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <3.47E-02 0 OOE+O{) 3.47E-02 Cs-134 <1.76E-02 0 OOE+OO 1 76E-02 Cs-137 <1 49E-02 0 OOE+OO 1.49E-02 Be-7 <9 71E-02 OOOE+OO 9.71E-02 K-40 4.82E-0 1 176E*01 1 7SE-01 Sample ID: 465241 Sample Dates: 12126/2017

-1/2/2018 Nuclide Activity 2 Sigma Error MDA 1-131 <2 19E-02 0 OOE+OO 2 19E 0 2 Cs-134 <1 64E-02 0 OOE+OO 1.64E*02 Cs-137 <1 71E-02 0 OOE+OO 1 71E-02 Be-7 <1 24E-01 O.OOE+OO 1 24E*0 1 K-40 3 6 3 E-01 1 78E*01 2 1 9E-01 Sample Point 085 [ INDICATOR -NNW@ 0.88 miles] Sample ID: 431850 Sample Dates: 1212712016 -1/3/2017 Nuclide Act i vity 2 Sigma Error MDA 1-131 <8.58E-03 0 OOE+OO 8 58E-03 Cs-134 <4 57E-03 0.00E+OO 4 57E-03 Cs-137 <6.59E-03 0 OOE+OO 6 59E-03 Be-7 <5.60E-02 0 OOE+OO 5 60E-02 K-40 5.47E-01 1 57E-01 2 80E-02 Sample ID: 432251 Sample Dates: 11312017 -1/912017 Nuclide Activity 2 Sigma Error MDA 1-131 <1 16E-02 0 OOE+OO 11SE-02 Cs-134 <5 90E-03 0 OOE+OO 5 90E-03 Cs-137 <: 1 04E-0 2 0 OOE+OO 1 04E-02 B e-7 <8 02E-02 0 OOE+OO 8.02E-02 K-40 4 12E-01 1 53E-01 3 61E-02 Sample ID: 432945 Sample Dates: 1/9/2017 -1/1612017 Nuclide Activity 2 Sigma Error MDA 1-131 <1 OSE-02 O.OOE+OO 1 O SE-02 Cs-134 <6.54E-03 O.OOE+OO 6 54E-03 Cs 137 <: 7.28 E-03 O.OOE+OO 7 28E-03 Be-7 <4.06E-02 O.OOE+DO 4 06 E-02 K-40 3.19E-01 124E-01 3 09E-02 Sample ID: 433341 Sample Dates: 1/1612017 -11 23/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <7.42E-03 0 OOE+OO 7 42E-03 Cs-134 <7.60E-03 0 OOE+OO 7 , 60E-03 C s-137 <1 01E-02 DODE+OO 1.01E-02 Be-7 <6.4SE-02 0 OOE+OO 6.48E-02 K-40 5 04E-01 1 78E-01 1.69E-01 Sample ID: 433780 Sample Dates: 1123/2017 -1/30/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <1 OOE-02 0 OOE+OD 1.DDE-02 Cs-134 <9.4 3E-03 O.OOE+OO 9 43E-03 Cs-137 <:9 47E-03 O.OOE+OO 9 47E-03 Be-7 <5 27E-02 O.OOE+OO 5 27E-02 K-40 5.67E-01 1 67E-01 3 07E-02 Report Generated@ 3/2112018 14: 30*38 c En lffi) EnRad Laboratoies Appendix E

Page 43 of 93 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersville, North Carofina 28078
- ocoNEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: AIR RADIOIODINE Concentration (Activity):

pCl/m3 Sample Point 085 ( INDICATOR -NNW@ 0.88 miles) Sample ID: 434500 Sample Dates: 1/30/2017

2/6/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <1.04E-02 0 OOE+OO 1 04E-02 Cs-134 <4 58E-03 0 OOE+OO 4 , 58E-03 Cs-137 <8 64E-03 0 OOE+OO 8.64E-03 Be-7 <5 60E-02 0 OOE+OO 5.60E-0 2 K-40 3 59E-01 1.27E-01 2 86E-02 Sample I D: 435146 Sample Dates: 2/612017. 2/1312017 Nuclide Activity 2 Sigma Error MDA 1-131 <8 84E-03 0 OOE+OO 8.84E-03 Cs-134 <5.86E-03 OOOE+OO 5 86E-03 Cr.-137 <1 83E*03 OOOE+OO 1 83E-03 Be-7 <5.24E-02 0 OOE+OO 524E-02 K-4 0 3.31E-01 1 26&01 3 09 E-02 Sample ID: 435847 Sample Dates: 2/1312017

-2/20J2017 Nuclide Activity 2 Sigma Error MDA 1*131 <9.23E*03 O.OOE+OO 9 23E-03 Cs-134 <8 82E-03 O.OOE+OO 8 82E*03 Cs-137 <7 56E-03 0 OOE+OO 7.56E.03 Be-7 <6.41E-02 O.OOE+OO 6.41E-02 K-40 119E-01 8 47E-02 1.02E-01 Sample ID: 436299 Sample Dates: 2/20/2017

2127/2017 Nuclide Act ivity 2 Sigma Error MDA 1-131 <8 98E-03 0 OOE+OO 8.98E-03 Cs-134 <680E-03 OOOE+OO 6.BOE-03 Cs-137 <1 26E-02 OOOE+OO 1.26E-02 Be-7 <5 45E-02 0 OOE+OO 5.45E-02 K-40 1 -41E*01 7 93E*02 2.94E-02 Sample ID: 436755 Sample Dates: 2/27/2017
3/6/2017 Nuc lide Activity 2 S igma Error MDA 1-131 <6.99E-03 OOOE+OO 6.99E-03 Cs-134 <7 36E-03 t O.OOE+OO 7 36E-03 Cs-137 <9.14E-03 O.OOE+OO 9 14E-03 Be-7 <5.90E-02 O.OOE+OO 5.00E-02 K-40 167E 01 1 OSE-01 1.21E-01 Sample ID: 437626 Sample Dates: 3/6/2017 -3/13/2017 Nuclide Activity 2 S igm a Error MDA 1-1 31 <1.02E-02 O , O OE+OO 1.02E-02 Cs-134 <1 02E-02 O.OO E+OO 1.02E-02 Cs-137 <7 56E 03 O OO E+OO 7.S6E-03 Be-7 <6 08E-02 0 OOE+OO 6.0S E-02 K-40 <2 84E-01 0 OOE+OO 2 84E-01 Sample ID: 438339 Sample Oates: 3/13/2017

-3/20/2017 Nuclide Activity 2 Sigma Error MD4 1-131 <9 73E.03 0 OOE+OO 9.73E-03 Cs-134 <8.06E-03 0 OOE+OO 8 06E-03 Cs-137 <7 86E-03 0 OOE+OO 7 86E-03 Be-7 <6.57E 0 2 0 OOE+OO 6 57E-02 K-40 1.89E-0 1 1 22E-01 1 63E-01 Sample ID: 43884-4 Sample Dates: 3/20/2017. 3/27/2017 Nuclide Activity 2 S i gma Error MDA 1-131 <9.04E*03 O.OOE+OO 904E-03 Cs-1 34 <7.40E-03 O.OOE+OO 7 40E-03 Cs-137 <8.04E-03 O.OOE+OO 8.04E-03 Be-7 <521E-02 0.00E+OO 5.21E-02 K-40 1 69E 01 9 52E-02 9.93E-02 Sample ID: -439226 Sample Date,: 3/27/2017. 4/3/2017 Nuclide Activity 2 Sigma Error MOA 1-131 <1 02E-02 OOOE+OO 1.02E-02 Cs-134 <6 96E-03 0 OOE+OO 6.96E-03 Cs*137 <111E-02 OOOE+OO 1.11E-02 Be-7 <5.65E-02 OOOE+OO 5.65E-02 K-40 <2 31 E.01 OOOE+OO 2.31E-01 Sample ID: 440048 Sample Oates: 4/3/2017

4/10/2017 Nuclide Activity 2 Sigma Error MDA l-1 3 1 <8 12E-03 0 OOE+OO 8 12E-03 C s*1 34 <3.62E-03 O.OOE+OO 3.62E-03 C s-37 <1 02E-02 O.OOE+OO 1.02E-02 Be 7 <5 19E-0 2 O.OOE+OO 5.19E-02 K-40 <2 12E.01 0.00E+OO 2 12E-01 Report Generated@

3/21/201814 .30: 38 c ij ij) EnRad Laboratories Append i x E -Page 44 of 93 Duke Ene r gy Annua l Report -Appendix E 13339 Hagers Ferry Road Huntersville , North CaroNna 28078 OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: AIR RADIOIODINE Concentration (Activity)

pCi/m3 Sample Point 085 [INDICATOR. NNW@ 0.88 miles] Sample ID: 440836 Sample Dates: 4/10/2017

-4/17/2017 Nuclide Activity 2 S i gma Error MDA 1-131 <9.46E-03 O.OOE+OO 9.48E-0 3 Cs-134 <8.20E-03 O.OOE+OO 8.20E-03 Cs-137 <8.89E-03 O.OOE+OO 8.89E-03 Be-7 <6.18E-02 O.OOE+OO 6 18E-02 K-40 2.86E-01 1 17E*01 3 1 0 E-0 2 Sample ID: 441452 Sample Dates: 4/17/2017 -4/24/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <1.01E-0 2 O.OOE+OO 1 01E-02 C s-1 34 <6.19E-0 3 O.OOE+OO 619E-03 C s-1 3 7 <9.29E-03 O.OOE+OO 929E-03 B e-7 <6.91E-02 O.OO E+OO 6 91E-02 K-40 3.65E-01 1.32 E-01 9 50E-0 2 Sample ID: 441901 Sample Dates: 4/24/2017. 5/1/2017 Nuclide Activity 2 S i gma Error MOA 1-131 <8.22 E-03 0 OOE+OO 8 22E-03 Cs-134 <5.07E-03 0 OOE+OO 5.07 E-03 Cs-137 <1.08E-0 2 0 OOE+OO 1 OSE-02 Be-7 <5.72E-0 2 O.OOE+OO 5.72 E-02 K-40 3.12E-0 1 1.43E-01 1 5 2 E-01 Sample 10: 442362 Sample Dates: 5/1/2017 . 5/812017 Nuclide Activity 2 Sigma Error MOA 1-131 <9.59E-03 O.OOE+OO 9 59E-03 Cs-134 <7.75E-03 O.OOE+OO 7.75E-03 Cs-137 <7.96E-03 O.OOE+OO 7.96E-03 Be-7 <5.55E-0 2 O.OOE+OO 5 SSE-02 K-40 2.16 E-01 1 36E-0 1 1.SSE-0 1 Sample ID: 442905 Sample Dates: 5/8/2017

5/15/2017 Nuclide Act i vity 2 S i gma Error MOA 1-131 <1.0 2 E-02 O.OOE+OO 1 02E-0 2 Cs-134 <7.0SE-03 O.OOE+OO 7 OSE-03 Cs-137 <5 77E-03 O.OOE+OO 5 77E-03 Be-7 <4 64E-0 2 OOOE+OO 4 84E*02 K-<10 3 18E-01 136E-01 14 0 E-01 Sample ID: 443345 Sample Oates: 5/15 1 2017 -5/22/2017 Nuclide Activity 2 Sigma Error MOA 1-131 <5.54E-03 0 OOE+OO 5 54 E-03 Cs-134 <7.6 2 E-03 0 OOE+OO 7 62E-03 C s-137 <5.54E-0 3 OOOE+OO 5 54E-03 Be-7 <5.11E-0 2 O OO E+O ll 511E-02 K-<1 0 4 62E-01 1 68E-0 1 170E-01 Sample 10: 443897 Sample Oates: 5122/2017

-5/30/2017 Nuclide Act i vity 2 Sigma Error MDA 1-131 <7 96E-03 O.O O E+OO 7 96E-0 3 C s-1 3 4 <6 12E-03 O.OOE+OO 6 12E*03 C s-137 <7 59E-03 O.OOE+O O 7.59E-03 Be-7 <3.82E*02 OOOE+O O 3 62E-02 K-40 <2 84E-0 1 O.OOE+OO 2 64E*01 Sample ID: 444304 Sample Dates: 5/30/2017 -6/5/2017 Nuclide Activity 2 Sigma Error MOA 1*13 1 <8 63E-03 0 OOE+OO 8 63E-03 Cs-134 <9 42E-03 OOOE+OO 9 42E-0 3 Cs-137 <1 44E-02 OOOE+OO 144E 02 Be-7 <7 09E-0 2 OOOE+OO 709&02 K-4 0 <3.40E-01 OOOE+OO 3 40E-01 Sample ID: 445366 Sample Dates: 6/5 1 2017 -6/12/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <7 94E-03 0 OOE+OO 7.94E 0 3 Cs-134 <7 67E-03 0 OOE+OO 7.67E-03 Cs-137 <1 OSE-02 OOOE+O O 1 OSE-02 Be-7 <5.4SE-02 O.OOE+O O 5.4SE-02 K-<10 <1 94E-01 O.OOE+OO 1.94E-01 Sample ID: 446366 Sample Dates: 6/12/2017

6/19/2017 Nuclide Activity 2 Sigma Error MOA 1--31 <6 S6E-03 OOOE+OO 8 S6E-03 C s-134 <6.45E-03 O.OOE+OO 6.45E-03 C s-1 3 7 <7 35E-0 3 0 OOE+OO 7 35E-03 B e-7 <4 27E-02 O OOE+OO 4 27E-0 2 K-40 2 54E-01 1.2 0 E*01 1 23E-0 1 Report Generaled@

3/21/2018 14: 30: 38 <E!@ EnRad Laborato~es Appendix E -Page 45 of 93 Duke Energy Annual Report

Appendix E 13339 Hagers Ferry Road Huntersville North Carolina 28078 OCONEE Radiological Environmental Monitoring Analysis Report* 2017 (Appendix E) Media Type: AIR RAOIOIODINE Concentration (Activity)

pClfm3 Sample Point 085 [INDICATOR*

NNW@ 0.88 miles} Sample ID: 446864 Sample Oates: 6/19/2017 -6/26/2017 Nu.:llde Activity 2 Sigma Error MDA 1-131 <8.86E-03 O.OOE+OO 8.86E-03 Cs-134 <7.66E-03 0.00E+OO 7.66E-03 Cs-137 <7.26E-03 O.OOE+OO 7.26E-03 Be-7 <4.04E-02 O.OOE+OO 4.04E-02 K-40 <2.68E-01 O.OOE+OO 2.68E-01 Sample ID: 447238 Sample Oates: 6/26/2017 -7/3/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <5.76E-03 OOOE+OO 5.76E-03 Cs-134 <4.54E-03 O.OOE+OO 4 54E-03 Cs-137 <6.53E-03 O.OOE+OO 6.53E-03 Be-7 <5.22E-02 O.OOE+OO 5.22E-02 K-40 1.74E-01 1.07E-01 1 32E-01 Sample ID: 447848 Sample Dates: 7/3/2017 -7/10/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <8.13E-03 O.OOE+OO 8.13E-03 Cs-1 34 <B.16.E-03 O.OOE+OO 8.1BE-03 Cs-137 <1.02E-02 O.OOE+OO 1.02E-02 Be-7 <6.28E-02 O.OOE+OO 6.2BE-02 K-40 1.09E-01 9 99E-02 1.49E-01 Sample ID: 448316 Sample Dates: 7/10/2017. 7/17/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <9.92E-03 O.OOE+OO 9.92E-03 Cs-134 <1.28E-03 O.OOE+OO 1.28E-03 Cs-137 <9.78E-03 O.OOE+OO 9.7BE-03 Be-7 <5.78E-02 O.OOE+OO 5.78E-02 K-40 1.78E-01 1.0SE-0 1 1.26E-01 Sample ID: 448932 Sample Oates: 7/17/2017. 7/24/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <5.40E-03 O.OOE+OO 5.40E-03 Cs-134 <6.65E-03 0.00E+OO 6.65E-03 Cs-137 <1.14E-02 O.OOE+OO 1.14E-02 Be-7 <2.98E-02 O.OOE+OO 2 98E-02 K-40 <2.33E-01 O.OOE+OO 2.33E-01 Sample ID: 449261 Sample Dates: 7/24/2017 -7/31/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <1.02E-02 O.OOE+OO 1.02E-02 Cs-134 <5 37E-03 0.00E+OO 5.37E-03 Cs-137 <8.13E-03 0.00E+OO 8.13E-03 Be-7 <6 38E-02 0 OOE+OO 6.38E-02 K-40 1 72E-01 9.57E-02 9.69E-02 Sample ID: 449981 Sample Dates: 7/31/2017 -817/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <6.94E-03 OOOE+OO 6 94E-03 Cs-134 <6.57E-03 OOOE+OO 6 57E-03 Cs-137 <8. HE-03 OOOE+OO 8 17E-03 Be-7 <3 72E-02 0 OOE+OO 3 72E-02 K-40 <2 18E-01 0 OOE+OO 2 18E-01 Sample ID: 450248 Sample Dates: 8/7/2017 -8/14/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <1.09E-02 O.OOE+OO 1.09E-02 Cs-134 <6 93E-03 O.OOE+OO 6.93E-03 Cs-137 <1 09E-02 O.OOE+OO 1.09E-02 Be-7 <4 60E-02 0 OOE+OO 4.60E-02 K-40 2 23E-01 113E-01 1.13E-01 Sample ID: 450765 Sample Dates: 8/14/2017

8/21/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <6.98E-03 0 OOE+OO 6.98E-03 Cs-134 <8.07E-03 0 OOE+OO 8.07E-03 Cs-137 <6.81E-03 0 OOE+OO 6.81E-03 Be-7 <7.07E-02 OOOE+OO 7.07E-02 K-40 6.24E-02 7.57E-02 120E-01 Sample 10: 451229 Sample Dates: 8121/2017

-8/28/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <1.06E-02 O.OOE+OO 1.06E-02 Cs-134 <B 03E-03 O.OOE+OO 8.03E-03 Cs-137 <8 71E-03 O.OOE+OO 8.71E-03 Be-7 <6 42E-02 OOOE+OO 6.42E-02 K-40 1 46E-01 8 78E-02 8.28E-02 Report Generated@ 3/21/2018 14'30: 38 c Ei@) EnRad Laboratories Appendix E -Page 46 of 93 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersville , North Carolina 28078 OCONEE Radiological Environmental Monito'ring Analysis Report -2017 (Appendix E) Media Type: AIR RADIOIODINE Concentration (Activity)

pCUm3 Sample Point 085 [INDICATOR*

NNW@ 0.88 miles) Sample ID: 451572 Sample Dates: 8/28/2017 . 9/5/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <8.22E-03 0 OOE+OO 8 22E-03 Cs-134 <8.37E-03 OOOE+OO 8 37E-03 Cs-137 <9 93E-03 OOOE+OO 9 , 93E*0 3 ae-7 <6.46E-02 0 OOE+OO 6.46E-02 K-40 <1.96E-01 0 OOE+OO 196E-01 Sample ID: 452406 Sample Dates: 9/5/2017. 9/11/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <1.06E-02 0 OOE+OO 1 OOE-02 Cs-134 <5 97E-03 O.OOE+OO 5.97E-03 Cs-137 <9 72E-03 O.OOE+OO 9.72E-0 3 Be-7 <6 72E-02 O.OOE+OO 6 72E*02 K-40 116E-01 1 07E-01 1.57E.0 1 Sample ID: 452825 Sample Dates: 9/11/2017. 9/18/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <7 18E-03 O.OOE+OO 7.18E-0 3 Cs-134 <628~-03 0 OOE+OO 6 28E-03 Cs-137 <1 1 3E-02 O.OOE+OO 113E*02 Be-7 <6.95E-02 0 OOE+OO 6 95E-0 2 K-40 <2.46E-01 OOOE+OO 2 45E-01 Sample ID: 452980 Sample Dates: 9/18/2017

9/25/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <8 1 lE-03 0 OOE+OO 811E*03 Cs-134 <7 86E-03 OOOE+OO 7.86E-03 Cs-137 <8.62E-0 3 O.OOE+OO 8 62E*03 Be-7 <368E-02 O.OOE+OO 3 68E-0 2 K-40 2 32E-01 113E-01 113E*01 Sample ID: 453484 Sample Dates: 9/2512017
10/212017 Nuclide Activity 2 Sigma Error MOA 1-131 <1.81E-02 O.OOE+OO 1.81E-02 ' Cs-134 <9.0SE-03 0.00E+OO 9 05E*03 Cs-137 <1 69E-02 OOOE+OO 1 sgi;.02 Be-7 <9.87E-02 O.OOE+OO 9 87E-0 2 K-40 <3.76E-01 O.OOE+OO 3 76E 0 1 Sample 10: 454259 Sample Oates: 10/2/2017

-10/9/2017 Nuclide Activity 2 Sigma Error MOA 1-131 <1 72E-02 0 OOE+OO 1 72E*02 Cs-134 <1.18E-02 0 OOE+OO 1.16E-02 Cs-137 <1.65E-02 0 OOE+OO 165E*02 Be-7 <1 01E-01 0 OOE+OO 1.01E-01 K-40 355E-01 1 56E-01 1 57E-01 Sample ID: 455116 Sample Dates: 10/912017

10/16/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <1 59E-02 0.00E+OO 1 59E-02 Cs-134 <1 71E-02 O.OOE+OO 1.71E-02 Cs-137 <1 60E-02 O.OOE+OO 1.60E-02 Be-7 <1 OBE-01 O.OOE+OO 1 OBE-01 K-40 2 44E-01 1 28E-01 1 28E-01 Sample ID: 455452 Sample Dates: 10/16/2017

-10/23/20 17 Nuclide Activity 2 Sigma Error MDA 1-131 <2.15E-02 OOOE+OO 2 1SE-02 Cs-134 <1.89E-02 0 OOE+OO 1 89E-02 c,-131 <1 76E-02 0 OOE+OO 1.76E-02 Be-7 <1 OBE-01 0 OOE+OO 1 07E-01 K-40 3 67E-01 2.17E-01 3.0BE-01 Sample ID: 456082 Sample Dates: 10/23/2017 -10/30/2017 Nuclide Activity 2 Sigma Error MOA 1-131 <2 24E-02 0.00E+OO 2.24E-02 C s-134 <1 69E-02 O.OOE+OO 1.69E-02 C s-137 <1 71E-02 O.OOE+OO 1 71E-02 Be-7 <1 26E-01 O.OOE+OO 126E-01 K-40 5.28E-01 1 98E-01 199E-01 Sample ID: 461448 Sample Dates: 10/30/2017 -11/6/2 017 Nuclide Activity 2 Sigma Error MDA 1-131 <2.35E-0 2 0 OOE+OO 2 35E*0 2 C s-134 <1 75E-02 0 OOE+OO 1 75E-02 C s-137 <1 82E-02 0 OOE+OO 1.82E-02 Be-7 <1 18E-01 O.OOE+OO 1 18E-01 K-40 4 35E-01 1 75E-01 1 79E-01 Report Generated@ 3/21/201814 30 38 c ro w EnRad Laboratones Appendix E -Page 4 7 of 93 Duke Energy Annual Report

Appendix E 13339 Hagers Ferry Road Huntersville , North Caro li na 28078 OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: AIR RADIOIODINE Concentration (Activity):

pCl/m3 Sample Point 085 [ INDICATOR -NNW @ 0.88 miles] Sample ID: 462004 Sample Dates: 111612017 -11 113/2017 Sample ID: 462643 Sample Dates: 1111312017

11120/2017 Sample ID: 463132 Sample Dates: 11120/2017
11/27/2017 Sample ID: 463542 Sample Dates: 11/2712017

-1214/2017 Sample ID: 464183 Sample Dates: 12/412017 -1211112017 Sample ID: 464740 Sample Oates: 1211112017 -12118/2017 Sample ID: 465006 Sample Oates: 1211812017

12/2612017 Samp l e ID: 465242 Sample Dates: 12126/2017 -11212018 Media Type: DRINKING WATER Concentration (Activity):

pCi/1 Samp l e Point 060 [ INDICATOR -NE @ 3.23 miles] Sample ID: 431608 Sample Dates: 121512016 -1/312017 Report Generated@ 3/21/2018 14: 30: 38 Duke Energy Annual Report -Appendix E Nuclide 1-131 Cs-134 Cs-137 Be-7 K-40 Nuclide 1-131 Cs-134 Cs-137 Be-7 K-40 Nuclide 1-131 Cs-134 Cs-137 B e-7 K-40 Nuclide 1-13 1 Cs-134 Cs-137 Be-7 K-40 Nuclide 1-131 Cs-134 Cs-137 Be-7 K-40 Nucllde 1-131 Cs-134 Cs-137 Be-7 K-40 Nuclide 1-131 Cs-134 Cs-137 Be-7 K-40 Nuclide 1-131 Cs-134 Cs-137 B e-7 K-40 Nuclide Beta Mn-54 Co-56 Fe-59 Co-60 Zn-65 Zr-95 Nb-95 1-131 Cs-134 EnRad Laboratories 13339 Hagers Ferry Road Huntersville. North Carolina 28078 A c tivity <2 56E-02 <1 56E-02 <2 06 E-0 2 <1 12E-01 4.58E-01 Activity <2 28E-02 < 1 72E-02 <1.68E-02 <1 34E-01 6 , 02E-01 Activity <2.29E*02 , q 531::: 02 <1 98E-02 <1 13E-01 4 39E-01 Activity <2 15E-0 2 <1 65E-02 <1.94E-02 <114E-01 3.98E-01 Activity <2.30E-02 <1 76E-02 <1.76E-02 <1 03E-01 3 57E-01 Act i vity <2 25E*02 <1 73E-02 <1 91E-02 <1.37E-01 2.62E-01 Activity <3 , 71E-02 <1 60E-02 <1.45E*02 <1 13E-01 5 OBE-01 Activity <2 28E-02 <1 50E-02 <1 , B1E-02 <1 OSE-01 4.48E-0 1 Act i vity <5 08E-01 <1 71E+OO <2 14E+OO <3 95E+OO <1 57E+OO <4 61E+OO <4 03E+OO <2 32E+OO <9 67E+OO <2.17E+OO 2 Sigma Error MDA O.OOE+OO 2 56E*02 O.OOE+OO 1 56E-02 O.OOE+OO 2.0SE-02 0.00E+OO 1.12E-01 1.71E*01 1 35E-01 2 Sigma Error MDA O.OOE+OO 2.28E-02 O.OOE+OO 1.72E-02 O.OOE+OO 1 68E-02 O.OOE+OO 1 34E 01 2.19E-01 2 36E-01 2 S i gma Error MDA 0.00E+OO 2 29E-02 O.OOE+OO 1 53E-02 O.OOE+OO 1 98E*02 O.OOE+OO 113E-01 1.82E-01 1 93E-01 2 Sigma Error MDA O.OOE+OO 2.15E-02 O.OOE+OO 1.65E-02 O.OOE+OO 1 94E-02 O.OOE+OO 114E*01 1.67E-01 1.69E-01 2 Sigma Error MDA O.OOE+OO 2 30E*02 O.OOE+OO 1 76E-02 O.OOE+OO 1 76E-02 O.OOE+OO 1 03E-01 1.4 8E-0 1 1 20E.0 1 2 Sigma Error MOA O.OOE+OO 2.25E-02 O.OOE+OO 1 73E-02 O.OOE+OO 1 91E-02 OOOE+OO 1.37E-01 1.88E-01 2 70E-01 2 S i gma Error MDA OOOE+OO 3 71E-02 0 OOE+OO 1.60E*02 0.00E+OO 1.45 E-02 O.OOE+OO 113E*01 1 57E-01 306E-02 2 Sigma Error MDA 0 OOE+OO

2 28E-02 O.OOE+OO 1.SOE*02 0 OOE+OO 1 61E-02 OOOE+OO 1 OSE-01 1.72E-01 1.59E*01 2 Sigma Error MDA O.OOE+O O 1.21E+OO O.OOf:+00 1.71E+00 O.OOE+OO 2 14E+OO O.OOE+OO 3.9 5E+O O O.OOE+OO 1 57E+OO O.OOE+OO 4 61E+OO 0 OOE+OO 4 OJE+OO 0 OOE+OO 2 32E+OO 0 OOE+OO 9 67E+OO 0 OOE+OO 2 17E+OO Appendix E
Page 48 of 93
- ocONEE Radiological Environmental Monitoring Analysis Report. 2017 (Appendix E) Media Type: DRINKING WATER Concentration (Activity):

pCi/1 Sample Point 060 [INDICATOR* NE@ 3.23 miles] Sample ID: 431608 Sample Oates: 12/512016 -1/3/2017 Nucllde Activity 2 Sigma Error MOA Cs-137 <2 16E+OO OOOE+OO 2 16E+OO Bala-140 <590E+OO 0 OOE+OO 5 90E+OO Be-7 <2 16E+01 0 OOE+OO 2 16E+01 K-40 <3 26E+01 0 OOE+OO 3 26E+01 Sample ID: 433494 Sample Dates: 1/3/2017 -1/30/2017 Nuclide Activity 2 Sigma Error MDA Beta <211E-01 O.OOE+OO 119 E+OO Mn-54 <2 98E+OO O.OOE+OO 2 98E+OO Co-58 <2 95E+OO 0.00E+OO 2 95E+OO Fe-59 <7 59E+OO O.OOE+OO 7 59E+OO Co-60 <3.08E+OO O.OOE+OO 308E+OO Zn-65 <2.78E+OO O.OOE+OO 2.78E+OO Zr-95 <5.85E+OO 0.00E+OO 5.85E+OO Nb-95 <4.46E+OO O.OOE+OO 4 46E+OO 1-131 <1.20E+01 O.OOE+OO 1.20E+01 Cs-134 <3.81E+OO O.OOE+OO 3.81E+OO Cs-137 <3.07E+OO 0.00E+OO 3.07E+OO Bala-140 <6.69E+OO O.OOE+OO 6.69E+OO Be-7 <3 19E+01 O.OOE+OO 3.19E+01 K-40 6.88E+01 3.31E+01 4.27E+01 Sample ID: 434745 Sample Dateg: 12/5/2016 -2/27/2017 Nuclide Activity 2 Sigma Error MOA H3DW <-2 4E+01 O.OOE+OO 1 90E+02 Sample ID: 436099 Sample Dates: 1/3012017 -212712017 Nuclide Activity 2 Sigma Error MDA Beta <2. 17E-01 O.OOE+OO 1.20E+OO Mn-54 <3 54E+OO 0 OOE+OO 3.54E+OO Co-58 <3 73E+OO OOOE+OO 3 73E+OO Fe-59 <7 12E+OO , 0 OOE+OO 7.12E+OO Co~ <2 78E+OO 0 OOE+OO 2 78E+OO Zn-65 <8 76E+OO 0 OOE+OO 8 76E+oo Zr-95 <6 20E+OO 0 OOE+OO 6 20E+OO Nb-95 <4 86E+OO OOOE+OO 4 86E+OO 1-131 <119E+01 0 OOE+OO 119E+01 Cs-134 <3.49E+OO O.OOE+OO 3 49E+OO Cs-137 <4 48E+OO O.OOE+OO 4 48E+OO Bala-140 <2 25E+OO O.OOE+OO 2 25E+OO Be-7 <3.62E+01 O.OOE+OO 3.62E+01 K-40 <7.29E+01 O.OOE+OO 7 29E+01 Sample ID: 438667 Sample Dates: 2/27/2017 -3/27/2017 Nuclide Activity 2 Sigma Error MOA Beta <4 92E-01 O.OOE+OO 1.43E+OO Mn-54 <3 07E+OO O.OOE+OO 3.07E+OO Co-58 <2 96E+OO 0 OOE+OO 2 96E+OO Fe-59 <6.43E+OO O.OOE+OO 6.43E+OO Co-60 <3 25E+OO 0 OOE+OO 3.25E+OO Zn-65 <5 32E+OO 0 OOE+OO 5 32E+OO Zr-95 <6 06E+OO OOOE+OO 6.06E+OO Nb-95 <4 07E+OO 0 OOE+OO 4.07E+OO 1-131 <114E+01 0 OOE+OO 114E+01 Cs-134 <3 89E+OO 0 OOE+OO 389E+OO Cs-137 <3 32E+OO 0 OOE+OO 3 32E+OO Bala-140 <4 24E+OO 0 OOE+OO 4 24E+OO Be-7 <2 54E+01 0 OOE+OO 2 54E+01 K-40 6.24E+01 3.00E+0 1 3 70E+01 Sample ID: 440798 Sample Oates: 312712017

4/2412017 Nuclide Activity 2 Sigma Error MDA Beta 6 94E-01 6 75E-01 11 2E+OO Mn-54 <2 57E+OO 0.00E+OO 2.57E+OO Co-58 <2 79E+OO O.OOE+OO 2 79E+OO Fe-59 <6.49E+OO 0.00E+OO 6.49E+OO Co-60 <2 BSE+OO O.OOE+OO 2.85E+OO Zn-65 <5.74E+OO O.OOE+OO 5 74E+OO Zr-95 <5.97E+OO O.OOE+OO 5.97E+OO Nb-95 <3 66E+OO 0 OOE+OO 3.66E-t00 1-131 <9 60E+OO 0 OOE+OO 9.59E+OO Cs-134 <2 72E+OO OOOE+OO 2. 72E+OO Cs-137 <2 74E+OO 0 OOE+OO 2 74E+OO Report Generated@

3/21/2018 14: 30: 38 EnRad Laboratories Appendix E

Page 49 of 93 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersville, Nort h Carolina 28078 OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: DRINKING WATER Concentration (Activity)

pCi/1 Sample Po i nt 060 [ INDICATOR

-NE @ 3.23 miles] Sample ID: <<0798 Sample Oates: 3/27/2017 -4/24/2017 Nuclide Activity 2 Sigma Error MDA Bala-140 <5.71E+OO 0 O OE+OO 5.71E+OO Be-7 <2.25E+01 O.OOE+OO 2 25E+01 K-40 8.95E+01 3.55E+01 4.72E+0 1 Sample ID: 442367 Sample Dates: 2127/2017

5/22/2017 Noolide Act i vity 2 Sigma Error MOA H3DW <-96 E+01 O.OOE+OO 1 98E+02 Sample ID: 443066 Sample Dates: 4/24/2017

-5/22/2017 Nuclide Activity 2 S i gma Error MDA Beta <1 84E-0 1 O.OOE+OO 1 39E+OO Mn-54 <3 01E+OO O.OOE+OO 3 01E+OO Co-58 <3 9 1 E+OO O.OO E+OO 3.91E+OO Fe-59 <7 19E+OO 0 OOE+OO 7.1 9E+OO Co-60 <4 02E+OO 0 OOE+OO 4 02E+OO Zn-65 <7 75E+OO 0 OOE+OO 7.75E+OO Zr-95 <6 71E+OO OOOE+OO 6.71E+OO Nb-95 <5.07E+OO O.OOE+OO 5.07E+OO 1-131 <116E+01 O.OOE+oO 116E+01 Cs-134 <3.49E+OO O.OOE+OO 3.49E+OO Cs-137 <3.29E+OO O.OOE+OO 3 29 E+OO Bala-140 <1 01E+01 O.OOE+OO 1 01E+01 Be-7 <3.08E+01 0.00E+OO 3 08E+01 K-40 <6.09E+01 O.OOE+OO 6 09E+01 Sample ID: 445671 Sample Dates: 5/22/2017 -6/19/2017 Nuclide Activity 2 Sigma Error MDA Be l a 1.4 6 E+OO 8 43 E-01 1 35E+OO Mn-54 <3 49E+OO 0 OOE+OO 3.49E+OO Co-58 <2 89E+OO 0 OOE+OO 2 89E+OO Fe-59 <6 90E+OO OOOE+OO 6 , 90E+OO Co-6p <2 63E+OO OOOE+OO 2.63E+OO Zn-65 <7 32E+OO O.OOE+OO 7 32E+OO Zr-95 <6 70E+OO 0.00E+OO 6 70E+OO Nb-95 <4 13E+OO O.OOE+OO 4 13E+OO 1-131 <1 07E+01 O.OOE+OO 1 07E+01 Cs-134 <2.88E+OO O.OOE+OO 2 88E+OO C s-137 <2.64E+OO O.OOE+OO 2 64E+OO Bala-140 <1 12E+01 O.OOE+OO 112E+01 Be-7 <3 0 2 E+01 0 OOE+OO 302E+01 K-40 <4 99 E+01 OOOE+OO 4 99 E+01 Sample ID: 447964 Sample Oates: 6/19/2017 -7/17/2017 Nuclide Activity 2 Sigma Error MDA Beta <5.51E-01 OOOE+OO 1.48E+OO Mn-54 <3.22E+OO O.OOE+OO 3.22E+OO Co-58 <2 69E+OO O.OO E+OO 2.69E+OO Fe-59 <6.17E+OO O.OOE+OO 6.17E+OO Co-60 <3.00E+OO 0.00E+OO 3.00E+OO Zn-65 <4.30E+OO O.OOE+OO 4 30E+OO Zr-95 <4.27E+OO O.OOE+OO 4 27E+OO Nb-95 <3.12E+OO O.OOE+OO 3 12E+OO 1-131 <1.10E+01 O.OOE+OO 110E .. 0 1 Cs-134 <3 31E+OO O.OOE+OO 3.31E+OO Cs-1 37 <2.42E+OO 0 OOE+OO 2 42E+OO Bala-140 <7.67 E+OO 0 OOE+OO 7.67E+OO Be-7 7.00E+OO 2 OOE+01 3.44E+0 1 K-40 4.26E+01 2.53E+01 3.52E+0 1 Sample ID: 450054 Sample Dates: 5/22/2017 -8/14/2017 Noolide Act i vity 2 Sigma Error MDA H3DW <-5.9E+01 O.OOE+OO 2 OSE+0 2 Sample ID: 450093 Sample Dates: 7/17/2017 -8/14/2017 Nuclide Activity 2 Sigma Error MDA Beta 8.72E-01 853E-01 1.42E+OO Mn-54 <2.51E+OO O.OOE+OO 2 51E+OO Co-58 <3 31E+OO O.OOE+OO 3.3 1 E+OO Fe-59 <7.11E+OO OOOE+OO 7.11E+OO Co-60 <3.37E+OO 0 OOE+OO 3.37E+OO Zn-65 <6.61E+OO 0 OOE+OO 6.61E+OO Zr-95 <5.58E+OO O.OOE+OO 5.58E+OO Nb , 95 <4.6JE+OO O.OOE+OO 4.63E+OO 1-131 <1 18E+01 O.OOE+OO 1 18E+01 Cs-134 <4.21E+OO O.OOE+OO 4 21E+OO Report Generated@ 3/21/2018 14: 30: 38 cfI ID EnRad Laboratories Appendix E -Page 50 of 9~ Duke Energy Annual Report -Append i x E 13339 Hagers Ferry Road Huntersville, North Carolina 28078 OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: DRINKING WATER Concentration (Activity)

pCi/1 Sample Point 060 [INDICATOR*

NE@ 3.23 miles] Sample ID: 450093 Sample Dates: 7/17/2017. 8/14/2017 Nuclide Activity 2 Sigme Error MDA Cs-137 <3.68E+OO 0 OOE+OO 3 66E+OO Bala-140 <1.01E+01 O.OOE+OO 1 01E+01 Be-7 <3 05E+01 O.OOE+OO 305E+01 K-40 4 79E+01 3.40E+01 4 96E+01 Sample 10: 451826 Sample Dates: 8/14/2017

9/1112017 Nuclide Activity 2 Sigma Error MDA Beta <3.00E-01 0 OOE+OO 1 20E+OO Mn-54 <2 73E+OO 0 OOE+OO 2.73E+OO Co-56 <2 61E+OO 0 OOE+OO 2 61E+OO Fe-59 <6 25E+OO 0 OOE+OO 6 25E+OO Co-60 <2 96E+OO 0 OOE+OO 2.9SE+O O Zn-65 <5 07E+OO 0 OOE+OO 5.07E+OO Zr-95 <4.90E+OO 0 OOE+OO 4.90E+OO Nb-95 <4 90E+OO O.OOE+O O 4.90E+OO 1-131 <110E+01 O O OE+OO 110E+01 Cs-134 <2 75E+OO 0.00E+OO 2 75E+OO Cs-137 <2 40E+OO O.OOE+OO 2.40E+O O Bala-140 <6.65E+OO O.OOE+OO 8.85E+OO B e-7 <2.54E+01 O.OOE+OO 2 54E+01 K-40 1 84E+01 2.36E+01 3.90E+01 Sample ID: 454590 Sample Oates: 9/11/2017 . 101912017 Nuclide Activity 2 Sigma Error MDA Beta <367E-01 O.OOE+OO 1 36E+OO Mn-54 <2.44E+OO O.OOE+OO 2 44E+OO Co-58 <2 63E+OO O.OOE+OO 2 63E+OO Fe-59 <6 33E+OO 0 OOE+OO 6 33E+OO Co-60 <2 75E+OO O.OOE+OO 2 75E+OO Zn-65 <5 BOE+OO 0 OOE+OO 5 BOE+OO Zr-95 <5 50E+OO , OOOE+OO 5 50E+OO Nb-95 <3 71E+OO 0 OOE+OO 3.71E+OO 1-131 <119E+01 O.OOE+OO 1.19E+01 Cs-134 <2 49E+OO OOOE+O O 2.49E+OO Cs-137 <2.59E+OO O.OOE+OO 2.59E+O O Bala-140 <8.23E+OO 0.00E+OO 8.23E+OO Be-7 <2.51E+01 O.OOE+OO 2 51E+01 K-40 4 84E+01 2 79E+01 3 , 88E+01 Sample ID: 461751 Sample Dates: 101912017

-1 116/2017 Nuclide Activity 2 S i gma Error MDA Beta <5 74E-01 O.OOE+OO 1.48E+OO Mn-54 <4.45E+OO O.OOE+OO 4.45E+OO Co-5 8 <5.31E+OO O.OOE+OO 5.31E+OO Fe-59 <9 14E+OO O.OOE+OO 9.14E+OO Co-60 <4 30E+OO 0.00E+OO 4 30E+OO Zn-6 5 <6 51E+OO O.OOE+OO 6 51E+OO Zr-95 <8 41E+OO 0 OOE+OO 6 41E+OO Nb-95 <5 10E+OO 0 OOE+OO 5 10E+OO 1-131 <1 19E+01 0 OOE+OO 1 19E+01 Cs-134 <5 30E+OO 0 OOE+OO 5 30E+OO Cs-137 <3.76E+OO 0 OOE+OO 3 76E+OO B a la-140 <9 76E+OO 0 OOE+OO 9.76E+OO Be-7 <2 69E+01 0 OOE+OO 2 69E+01 K-40 <7.29E+01 0 OOE+OO 7.29E+01 Sample ID: 462375 Sample Dates: 811412017 -12/4/2017 Nuclide Activity 2 Sigma Error MDA H3DW <-7 OE+OO 0.00E+OO 1 90 E+02 Sample ID: 463807 Sample Dates: 111612017 -121412017 Nuclide Activity 2 Sigma Error MOA Beta <4 90E-01 0 OOE+OO 140E+OO Mn-54 <3.16E+OO O.OOE+OO 3 1SE+OO C<r 58 <3 65E+OO O.OOE+OO 3.65E+OO Fe-59 <6 06E+OO 0 OOE+OO 606E+OO Co-6 0 <3 70E+OO 0 OOE+OO 3 70E+OO Zn-65 <6 46E+OO OOOE+OO 646E+OO Zr*95 <7 52E+OO OOOE+OO 7 52E+OO Nb-95 <4 65E+OO OOOE+OO 465E+OO 1-3 1 <\ 14E+01 0 OOE+OO 114E+01 Cs*134 <3.51E+OO. 0 OOE+OO 3 51E+OO Cs-137 <4.05E+OO O.OOE+OO 4.05E+OO Report Generated@ 3/21/2018 14: 30.38 c f!@ EnRad Laborato11es Appendix E -Page 51 of 9~ Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersville , North Carofina 28078 OCONEE Ra.diological Environmental Monitoring Analysis Report. 2017 (Appendix E) Media Type: DRINKING WATER Concentration (Activity): pCi/1 Sample Point 060 [ INDICATOR -NE@ 3.23 miles J Sample ID: 463807 Sample Dates: 11/6/2017 -12/4/2017 Sample ID: 465394 Sample Dates: 12/4/2017 -1/2/2018 Sample Point 064 [ CONTROL -SSW@ 6.67 miles) Sample ID: 431609 Sample DatH: 12/5/2016 -1/3/2017 Sample ID: 433495 Sample Dates: 1/3/2017 -1/30/2017 Sample ID: 434746 Sample Dates: 12/5/2016 -2/27/2017 Sample ID: 436100 Sample Dates: 1/30/2017 -2/27/2017 Report Generated@ 3/21/201814

30: 38 Duke Energy Annual Report -Appendix E E n ij) Nuclide Bala-140 Be-7 K-40 Nuclide Beta Mn-54 Co-58 Fe-59 Co-60 Zn-6S Zr-95 Nb-95 1-131 Cs-134 Cs-137 Bala-140 Be-7 K-40 H3DW Nuclide Beta Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr-95 Nb-95 1-131 Cs-134 Cs-137 Bala-140 Be-7 K-40 Nuclide Beta Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr-95 Nb-95 1-131 Cs-134 Cs-137 Bala-140 Be-7 K-40 Nuclide H3DW Nuclide Beta Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr-95 Nb-95 1-131 EnRad Laboratories 13339 Hagers Ferry Road Huntersville, North Carolina 28078 Activity <7.80E+OO <2 82E+01 <661E+01 Activity 1 06E+OO <311E+OO <2 99E+OO <6.86E+OO <2 47E+OO <6.S7E+OO <5.11E+OO <4.3 2 E+OO <116E+01 <3 06E+OO <2 76E+OO <7 73E+OO <3 30E+01 <5 02E+01 <9 61E+01 Activity 8 57E 01 <1.97E+OO <2 16E+OO <5.29E+OO <1.89E+OO <3 99E+OO <4 40E+OO <2 26E+OO <1 20E+01 <2 01E+OO <2 24E+OO <613E+OO <2 16E+01 1 82E+01 Activity 7 98E-01 <2 97E+OO <2 92E+OO <5 87E+OO <3 68E+OO <5 49E+OO <6.24E+OO <4 07E+OO <1 12E+01 <3.30E+OO <2.55E+OO <6.95E+OO <2.69E+01 <5.02E+01 Activity <-4.0E+01 Activity <1 66E-01 <2.22E+OO <2.47E+OO <6.55E+OO <2.82E+OO <5.88E+OO <4 89E+OO <311E+OO <1 07E+01 2 Sigma Error MDA O.OOE+OO 7 SOE+OO O.OOE+OO 2 82E+0 1 O.OOE+OO 6.61E+0 1 2 Sigma Error MDA 818E-01 1.34E+OO OOOE+OO 3 11E+OO 0 OOE+OO 2 99E+OO OOOE+OO 6.86E+OO 0 OOE+OO 2 47E+OO 0 O OE+O O 6.57E+OO 0 OOE+OO 511E+OO 0 OOE+OO 4 32 E*OO O.OOE+OO 116E+01 O.OOE+OO 3 06E+OO O.OOE+OO 2 76E+OO O.OOE+OO 7 73E+OO 0 OOE+OO 3.30E+01 O.OOE+OO 5.02E+01 0 OOE+OO 1 67E+0 2 2 Sigma Error MDA 7.38E-01 1 22E+OO 0 OOE+OO 1 97 E+OO O.OOE+OO 2 16E+OO O.OOE+OO 5 29E+OO O.OOE+OO 1 89E+OO O.OOE+OO 3 99E+OO O.OOE+OO 4 40E+OO 0 OOE+OO 2.26E+OO 0 OOE+OO 1 20E+01 0 OOE+OO 2.01E+OO 0 OOE+OO 2 24E+OO 0 OOE+OO 6 13E+OO OOOE+OO 2 16E+01 2 09E+01 3.40E+01 2 Sigma Error MOA 7 21E-01 119E+OO 0.00E+OO 2 97E+OO 0 OOE+OO 2 92E+OO O.OOE+OO 5.87E+OO 0 OOE+OO 3.68E+OO 0 OOE+OO 5.49E+OO 0 OOE+OO 6.24E+OO 0 OOE+OO 4.07E+OO 0 OOE+OO 112E+01 0 OOE+OO 3.30E+OO O.OOE+OO 2 SSE+OO O.OOE+OO 6 95E+OO O.OOE+OO 2 69E+01 O.OOE+OO S.02E+01 2 Sigma Error MCA O.OOE+OO 1.92E+02 2 Sigma Error MDA O.OOE+OO 1.22E+OO 0 OOE+OO 2.22E+OO O.OOE+OO 2.47E+OO O.OOE+OO 6 55E+OO O.OOE+OO 2 82E+OO O.OOE+OO 5.88E+OO O.OOE+OO 4.89E+OO O.OOE+OO . 3.11E+OO 0 OOE+OO 1.07E+-01 Appendix E -Page 52 of 93 OCONEE Radiological Environmental Monitoring Ari'alysis Report* 2017 (Appendix E) Media Type: DRINKING WATER Concentration (Activity)

pCi/1 Sample Point 064 [CONTROL* SSW@ 6.67 miles J Sample ID: 436100 Sample Oates: 1/30/2017

-2/2712017 Sample ID: 438668 Sample Dales: 2/2712017 -3/27/2017 Sample 10: 440799 Sample Oates: 3/27/2017 -4124/2017 Sample ID: 442368 Sample Dates: 2127/2017

5/22/2017 Sample ID: 443067 Sample Dates: 4/24/2017
5/22/2017 Sample ID: 445672 Sample Dates: S/22/2017

-6/19/2017 Report Generated@ 3/21/2018 14: 30: 38 Duke Energy Annual Report -Appendix E Nuclide Cs-134 Cs-137 Bala-140 Be-7 K-40 Nuclide Beta Mn-54 Co-58 Fe-59 C o-60 Zn-65 Zr-95 Nb-95 1-131 Cs-134 Cs-137 Bala-140 Be-7 K-40 Nuclide Beta Mn-54 Co-58 Fe-59 Co-60 Zn-65 , Zr-95 Nb-95 l-131 Cs-134 Cs-137 Bala-140 Be-7 K-40 Nuclide H 3D W Nuclide Beta Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr-95 Nb-95 1-131 Cs-134 Cs-137 Bala-140 Be-7 K-40 Nuclide Beta Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr-95 Nb-9 5 1-13 1* Cs-134 EnRad Laboratories 13339 Hagers Ferry Road Huntersville , North Carolina 28078 Activity <3. 7E+OO <2.77E+OO <7.12E+OO 2.42E+01 <4.43E+01 Activity 1.86E+OO <3.85E+OO <4.14E+OO <7.14E+OO <2.95E+OO <4.89E+OO <7.S1E+OO <3.48E+OO <11 8E+01 <4 , 12E+OO <3.99E+OO <5.70E+OO <2.80E+01 2.98E+01 Activity 1 13E+OO <2.22E+OO <4.00E+OO <6.57E+OO <4.14E+OO <7 17E+OO <5.74E+OO <5.03E+OO <1.20E+01 <4.46E+OO <4 02E+OO <5 67E+OO 5 SOE+OO 2 77E+01 Activity <-6 9E+01 Activity 1.40E+OO <3.4 6E+OO <3.39E .. OO <B.11E+OO <4.09E+OO <6.69E+OO <5 70E+OO <4 85E+OO <1 14E+01 <4 76E+OO <3.74E+OO <9.57E+OO <2.93E+01 <6.01E+01 Activity 1 01E+OO <2.67E+OO <2.79E+OO <6.6SE+OO <3.36E+OO <5 27E+OO <3 2SE+OO <4 49E+OO <117E+01 <2 78E+OO 2 Sigma Error MOA 0 OOE+OO 3 17E+OO 0 OOE+OO 2 77E+OO 0 OOE+OO 7 12E+OO 2 22E+01 3 53E+01 0 OOE+OO 4 43E+01 2 Sigma Error MOA 9 09E--01 1.44E+OO O.OOE+OO 3.85E+OO O.OOE+OO 4.14E+OO O.OOE+OO 7.14E+OO O.OOE+OO 2 95E+O O 0.00E+OO 4.69E+OO 0 , 00E+OO 7 61E+OO 0.00E+OO 3.48E+OO

0 OOE+OO 118E+01 O.OOE+OO 4 12E+OO 0 OOE+OO 3.99E+OO 0 OOE+OO 5 70E+OO 0 OOE+OO 2 80E+01 2 80E+01 4 24E+01 2 Sigma Error MOA 7.03E-01 113E+OO 0 OOE+OO 2 22E+OO 0.00E+OO 4 OOE+OO O.OOE+OO 6 57E+OO O.OOE+OO 4 14E+OO O.OOE+OO 7.17E+OO O.OOE+OO 5.74E+OO Q , OOE+OO 5.03E+OO O.OOE+OO 1 20E+01 0 OOE+OO 4.46E+OO O.OOE+OO 4.02E+OO 0 OOE+OO 5.67E+OO 1 84E+01 3 31E+01 3 09E+01 4 93E+01 2 Sigma Error MDA 0 OOE+OO 2 OOE+02 2 Sigma Error MDA 8.68E-01 140E+OO 0 OOE+OO 3 48E+OO 0.00E+OO 3.39E+OO O.OOE+OO 8.11E+OO O.OOE .. 00 4 09E+OO o.ooe .. oo 6.69E+OO O.OOE+OO 5.70E+OO* O.OOE+OO 4.SSE+OO O.OOE+OO 1.14E+01 0 OOE+OO 4 78E+OO O.OOE+OO 3 74E+OO 0 OOE+OO 9.57E+OO 0 OOE+OO 2 93E+01 0 OOE+OO 6 01E+01 2 Sigma Error MDA 8.2SE-01 1 37E+OO O.OOE+OO 2 67E+OO O.OOE+OO 2 79E+OO O.OOE+OO 6.68E+OO O.OOE+OO 3 36E+OO O.OOE+OO 527E+OO O.OOE+OO 3.26E+OO O.OOE+OO 4.49E+OO O.OOE+OO 1.17E+01 0 OOE+OO 2.78E+OO Appendix E -Page 53 of 93 OCONEE Radiological Environmental Monitoring Analysis Report
2017 (Appendix E) Media Type: DRINKING WATER Concentration (Activity):

pCi/1 Sample Point 064 [CONTROL* SSW@ 6.67 miles) Sample ID: 445672 Sample Dates: 5/22/2017. 6/19/2017 Nuclide Activity 2 Sigma Error MDA Cs-137 <2.86E+OO O.OOE+OO 2 86E+OO Bala-140 <8 15E+OO OOOE+OO 8 15E+OO Be-7 <3.05E+01 0 OOE+OO 3 05E+01 K-40 3 54E+01 2 26E+01 2 77E+01 Sample ID: <<7965 Sample Dates: 6/1912017 -7/17/2017 Nuclide Activity 2 Sigma Error MDA Beta <-2.BE-02 OOOE+OO 1 4BE+OO Mn-54 <2 28E+OO 0 OOE+OO 2 28E+OO Co-58 <2 58E+OO 0 OOE+OO 2 58E+OO Fe-59 <5 82E+OO 0 OOE+OO 5.82E+OO Co-60 <1 79E+OO 0 OOE+OO 1 79E+OO Zn-65 <4.14E+OO 0 OOE+OO 4 14E+OO Zr-95 <3.07E+OO 0 OOE+OO 3.07E+OO Nb-95 <2.45E+OO O.OOE+OO 2 45E+OO 1-131 <8.25E+OO O.OOE+OO 8.25E+OO Cs-134 <2.38E+OO O.OOE+OO 2.38E+OO Cs-137 <1.57E+OO O.OOE+OO 1 57E+OO Bala-140 <4 77E+OO O.OOE+OO 4 77E+OO Be-7 <2 17E+01 0.00E+OO 2 17E+01 K-40 2 79E+01 2 16E+01 3 31E+01 Sample ID: 450055 Sample Oates: 5/22/2017. 8/14/2017 Nuclide Activity 2 Sigma Error MOA H3DW <-7 7E+01 0.00E+OO 2 02E+02 Sample ID: 450094 Sample Oates: 7/1712017

8/14/2017 Nuclide Activity 2 Sigma Error MDA Beta 1 SOE+OO 8.91E-01 1 43E+OO Mn-54 <3.51E+OO 0 OOE+OO 3 51E+OO Co-58 <4.73E+OO 0 OOE+OO 4 73E+OO Fe-59 <119E+01 OOOE+OO 119E+01 Co-60 <4.70E+OO OOOE+OO 4 70E+OO Zn-65 <9.91E+OO OOOE+OO 9 91E+OO Zr-95 <6 35E+OO OOOE+OO 6 35E+OO Nb-95 <6 96E+OO 0 OOE+OO 6 96E+OO 1-131 <1 18E+01 0 OOE+OO 11BE+01 Cs-134 <4 18E+OO 0 OOE+OO 4 18E+OO C s-137 <411E+OO 0 OOE+OO 4.11E+OO Bala-140 <9 40E+OO 0 OOE+OO 9.40E+OO Be-7 <4 22E+01 O.OOE+OO 4.22E+01 K-40 4 28E+01 3 37E+0 1 4.71E+01 Sample ID: 451827 Sample Dates: 8/14/2017. 9/11/2017 Nuclide Activity 2 Sigma Error MDA Beta <4.23E-01 O.OOE+OO 1.22E+OO Mn-54 <2.89 E+OO O.OOE+OO 2.89E+OO Co-58 <3.13E+OO O.OOE+OO 3.13E+OO Fe-59 <7.68E+OO O.OOE+OO 7.68E+OO Co-60 <3.41E+OO O.OOE+OO 3.41E+OO Zn-65 <5.82E+OO 0 OOE+OO 5.8 2E+OO Zr-95 <5.70E+OO O.OOE+OO 5 70E+OO Nb-95 <3.42E+OO O.OOE+OO 3.42E+OO 1-131 <116E+01 OOOE+OO 1 16E+01 Cs-134 <3 28E+OO 0 OOE+OO 3 28E+OO Cs-1 37 <3 21E+OO OOOE+OO 3 21E+OO Bala-140 <6 15E+OO OOOE+OO 6.15E+OO Be-7 <2 85E+01 0 OOE+OO 2.85E+01 K-40 8 82E+01 3.48E+01 4 28E+01 Sample ID: 454591 Sample Dates: 9/11/2017

-10/9/2017 Nuclide Activ i ty 2 Sigma Error MDA Beta <4 77E-01 O.OOE+OO 1.38E+OO Mn-54 <2.69E+OO O.OOE+OO 2.69E+OO Co-58 <2.67E+OO 0.00E+OO 2.67E+OO Fe-59 <5.79E+OO O.OOE+OO 5.79E+OO Co-60 <2.29E+OO O.OOE+OO 2.29E+OO Zn-65 <5.87E+OO O.OOE+OO 5.87E+OO Zr-95 <4.28E+OO O.OOE+OO 4.28E+OO Nb-95 <4.00E+OO 0 OOE+OO 4.00E+OO 1-131 <1.19E+01 0 OOE+OO 1.19E+01 Cs-134 <3 37E+OO OOOE+OO 3.37E+OO Cs-137 <3 02E+OO OOOE+OO 302E+OO Report Generated@ 3/2112018 14: 30: 38 c f1 W) EnRad Laboratories Append i x E

Page 54 of 93 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersville , North Carolina 28078 OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: DRINKING WATER Concentration (Activity)

pCf/1 Sample Point 064 [ CONTROL -SSW@ 6.67 miles ] Sample 10; 454591 Sample Oates; 9/1112017. 101912017 Sample ID: 461752 Sample Dates: 1019/2017

-11/6/2017 Sample 10; 462376 Sample Dates: 8/1412017 -12/4/2017 Sample ID: 463808 Sample Dates: 11/6/2017 -12/412017 Sample ID: 465395 Sample Dates: 12/4/2017 -1/2/2018 Sample Point 066 (INDICATOR. SSE@ 18.9 miles J Sample ID: 431610 Sample Dates: 1215/2016 -1/3/2017 Report Generated@ 3/21/2018 14: 30: 38 Duke Energy Annual Report -Appendix E Nuclide Bala-140 Be-7 K-40 Nuclide Beta Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr-95 Nb-95 1-131 Cs-1 34 Cs-137 Bala-1 40 Be-7 K-40 Nuclide H3DW Nuclide Beta Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr-95 Nb-95 l-131 Cs-134 Cs-137 Bala-140 Be-7 K-40 Nuclide Beta Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr-95 Nb-95 1-131 Cs-134 Cs-137 Bala-140 Be-7 K-40 H3DW Nuclide Beta Mn-54 Co-58 Fe-59 C o-60 Zn-65 Zr-95 Nb-95 1-131 EnRad Laboratories 13339 Hagers Ferry Road Huntersville , North Carolina 28078 Activity <806 E+OO <2.47E+01 <4.53E+01 Activity <7.09E-01 <3.35E+OO <3.39E+OO <5.55E+OO <2.01E+OO <6.24E+OO <6.61E+OO <4.01E+OO <1.17E+01 <2.91E+OO <3.44E+OO <6.26E+OO <2.05E+01 9.01E+0 1 Activity <-1.6E+0 1 Activity 9.53E-01 <2.79E+OO <3.30E+OO <6.88E+OO <3.18E+OO <8.85E+OO <7.59E+OO <4.97E+OO <1.19E+01 <3.65E+OO <3.47E*OO <1.05E+01 <3.79E+01 5.44E+01 Activity 1 18E+OO <1.67E+OO <2.27E+OO <4 09 E+OO <1.62E+OO <3.03E+OO <2 93E+OO <2 17E+OO <9 77E+OO <2 17E+OO <1 81E+OO <5.22E+OO <1 88E+01 3.49E+01 <3.28E+01 Activity 9.18E-01 <1.91E+OO <2 14E+OO <4.30E+OO <1 73E+OO <4.17E+OO <3.46E+OO <2 73E+OO <117E+01 2 Sigma Error MDA O.OOE+OO 8 06E+OO O.OOE+OO 2 47E+01 O.OOE+OO 4 53E+01 2 Sigma Error MDA 0.00E+OO 1 48E+OO O.OOE+OO 3 35E+OO O.OOE+OO 3.39E+OO O.OOE+OO 5.55E+OO O.OOE+OO 2 01E+OO O.OOE+OO 6.24E+OO O.OOE+OO 6.61E+OO 0.00E+OO 4.01E+OO O.OOE+OO 1 17E+01 O.OOE+OO 2 91E+OO O.OOE+OO 3.44E+OO O.OO E+OO 6.26E+OO O.OOE+OO 2 05E+01 3.4 2E+01 4.01E+01 2 Sigma Error MDA OOOE+OO 1.92E+02 2 Sigma Error MDA 8.48 E-01 1 40E+OO OOOE+OO 2 79E+OO 0 OOE+OO 3 30E+OO O.OOE+OO 688E+OO o.oq E+OO 318E+OO O.OOE+OO 8 85E+OO O.OOE+OO 7 59E+OO O.OOE+OO 4 97E+OO O.OOE+OO 119E+01 O.OOE+OO 3 65E+OO 0.00E+OO 3 47E+OO O.OOE+OO 1 05E+01 O.OOE+OO 3 79E+01 3.31E+01 4 40E+01 2 Sigma Error MDA 8 32E-01 1.35E+OO O.OOE+OO 1 67E+OO O.OOE+OO 2.27E+OO 0 OOE+OO 4 09E+OO O.OOE+OO 1 6 2 E+OO 0 OOE+OO 3.03E+OO 0 OOE+OO 2 93E+OO OOOE+OO 2 17E+OO 0 OOE+OO 9.77E+OO OOOE+OO 2 17E+OO OOOE+OO 1 81E+OO 0 OOE+OO 5 22E+OO 0 OOE+OO 1 88E+0 1 1 91E+01 2 81E+01 0 OOE+OO 1 67E+02 2 Sigma Error MDA 7 53E-01 1 24E+OO O.OOE+OO 1.91E+OO 0 OOE+OO 2.14E+OO 0 OOE+OO 4 30E+OO O.OOE+OO 1.73E+-00 0 OOE+OO 4. 17E+OO 0 OOE+OO 3.46E+OO OOOE+OO 2.73E+OO 0 OOE+OO 1 17E+01 Appendix E -Page 55 of 93 OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: DRINKING WATER Concentrat i on (Activity)

pCi/1 Sample Point 066 [ INDICATOR

-SSE@ 18.9 miles] Sample ID: 431610 Sample Dates: 12/5/2016 . 1/3/2017 Sample ID: 433496 Sample Dates: 1/3/2017

1 1 30/2017 Sample ID: 434747 Sample Dates: 1215/2016
2127/2017 Sample ID: 436101 Sample Dates: 1 1 30/2017
2127/2017 Sample ID: 438669 Sample Dates: 2/27/2017
3/27/2017 Sample ID: 440800 Sample Dates: 3127/2017
4124/2017 Report Generated@

3/21/2018 14: 30: 38 Duke Energy Annual Report

Appendix E Nuclide Cs-134 Cs-137 Bala-140 Be-7 K-40 Nuclide B eta M n-54 Co-58 Fe-59 Co-60 Zn-65 Zr-95 Nb-95 1-131 Cs-134 Cs-137 Bala-140 Be-7 K-40 Nuclide H3DW Nuclide Beta Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr-95 Nb-95 1-1 31 Cs-134 Cs-137 Bala-14 0 Be-7 K-40 Nuclide Bet a Mn-54 Co-58 F 59 Co-60 Zn-65 Zr-95 Nb-95 1-13 1 Cs-134 Cs-137 Ba l a-140 Be-7 K-40 Nuclide Beta Mn-54 Co-58 Fe-59 Co-80 Zn-65 Zr-95 Nb-95 1-131 Cs-134 EnRad Laboratories 13339 Hagers Ferry Road Huntersville. North Carolina 28078 Activity <2 16E+OO <2.04E+OO <5.58E+OO <1.84E+01 5.87E+01 Activity 1.35E+OO <2.74E+OO <3.0 3E+OO <6.88E+OO <4.15E+OO <7.90E+OO <6.49E+OO <5.10E+OO <1.20E+01 <3.43E+OO <2.88E+OO <1.01E+01 <2.56E+01 <6.08E+01 Activity 4 01E+0 2 Act i vity 1 17E+OO <3 33E+OO <4 13E+OO <8.44E+OO <2.76E+OO <6.65E+OO <7.0BE+OO

<4.94E+OO <1 19E+01 <3.36E+OO <3.48E+OO <7.73E+OO <2.99E+01 6 01E+01 Activity 7.12E-01 <2.75E+OO <3.44E+OO <7 77E+O O <3 43E+OO <5 18E+OO <3 57E+OO <2 63E+OO <1 18E+01 <4 85E+O O <3.14E+OO <8.85E+OO <3.82E+-0 1 5.21E+01 Activity 1.54E+OO <2.66E+OO <-3 28E+OO -c 6.45E+OO <3.SOE+OO <5.71E+OO <4.59E+OO <3.69E+OO "'113 E+01 <2.83E+OO 2 S ig ma Error MCA O.OOE+OO 2 1 6E+OO O.OOE+OO 2 04E+OO O.OOE+OO 5 58E+OO O.OOE+OO 1.84E+0 1 2.03E+01 2 51E+01 2 Sigma Error MCA 7 57E-01 1 21E+OO 0.00E+OO 2 74E+OO 0 OOE+OO 3 03E+O O O.OOE+OO 6 88E+OO 0 OOE+OO 4 15E+OO 0 OOE+OO 7.90E+OO 0 OOE+OO 649E+OO OOOE+OO 5 10E+OO 0 OOE+OO *1 20E+01 0 OOE+OO 3 43E+OO 0 OOE+OO 2.88E+OO 0 OOE+OO 1.01E+01 0 OOE+OO 2 , 56E+01 0 OOE+OO 6.08E+01 2 S igm a Error MDA 1 22E+02 1.90E+02 2 Sigma Error MCA 7 59E-01 1.23E+OO O.OOE+OO 3.33E+OO O.OOE+OO 4 13E+OO 0 OOE+OO 8.44E+OO O.OOE+OO 2.76E+OO O.OOE+OO 6.65E+OO 0.00E+OO 7 08E+OO O.OOE+OO 4 94E+OO OOOE+OO 1 19E+01 OOOE+OO 3 36E+OO OOOE+OO 3 48E+OO 0 OOE+OO 7 73E+OO 0 OOE+OO 2 99E+01 3.65E+01 5 0,4E+01 2 Sigma Error MDA 8 76E*01 1 47 E+OO O.OOE+OO 2 7 5E+OO O.OOE+OO 3.44E+OO O.OOE+OO 7 77E+OO O.OOE+OO 3.4 3E+OO O.OOE+OO 5.16E+OO 0.00E+OO 3 57E+OO O.OOE+OO 2.63E+OO O.OOE+OO 1 18E+01 O.OOE+OO 4 65E+OO O.OOE+OO 3 14E+OO O.OOE+OO 8 85E+OO O.OOE+OO 3 8 2E+01 3.29E+01 4 47E+01 2 S igm a Error MDA 7 36E-01 1 16E+OO O.OOE+OO 2 66E+OO O.OOE+OO 3.28E+OO O.OOE+OO 6.45E+OO O.OOE+OO 3.80E+OO O.OOE+OO 5.71E+OO O.OOE+OO 4 59E+OO O.OOE+OO 3.69E+OO O.OOE+OO 1 13E+01 O.OOE+OO 2 83E+OO Appendix E

Page 56 of 93 OCONEE Radiological Environmental Monitoring Analysis Report. 2017 (Appendix E) Media Type: DRINKING WATER Concentration (Activity)

pCl/1 Sample Point 066 [ INDICATOR

-SSE@ 18.9 miles] Sample ID: 440800 Sample Oates: 312712017 -412412017 Nuclide Activity 2 Sigma Error MDA Cs-137 <2.77E+OO O.OOE+OO 2.77E+OO Bala-140 <8.63E+OO 0 OOE+OO 8.63E+OO Be-7 <2.51E+01 O.OOE+OO 2 51E+01 K-40 4 37E+01 2.20E+01 2.44E+01 Sample ID: 442369 Sample Dates: 2/27/2017

512212017 Nuclide Activity 2 Sigma Error MOA H30W 2 89E+02 1 , 24E+02 1 98E+02 Sample ID: 443068 Sample Dates: 4/24/2017.

5/22/2017 Nuclide Activity 2 Sigma Error MDA Beta 1 17E+OO 8 71E-01 1.43E+OO Mn-54 <2.63E+OO O.OOE+OO 263E+OO Co-58 <2.93E+OO 0 OOE+OO 2 93E+OO Fe-59 <613 E+OO OOOE+O ll 6 13E+OO Co-60 <2.97E+OO 0 OOE+OO 2 97E+OO Zn-65 <5.46E+OO 0 OOE+OO 546E+OO Zr-95 <4 37E+OO 0 OOE+OO 4 37E+OO Nb-95 <3 21E+OO 0 OOE+O O 3 21E+OO 1-131 <1 01E+01 0 OOE+OO 1 01E+01 Cs-134 <2 83E+OO 0 OOE+OO 2 83E+OO Cs-137 <2 40E+OO 0.00E+OO 2 4 0E+OO Bala-140 <6 30E+OO O.OOE+OO 6 30E+OO Be-7 <2 49E+01 O.O OE+OO 2 49E+01 K-40 4 74E+01 2.31E+01 2 79E+01 Sample ID: 4'45673 Sample Dates; 5122/2017

6/1912017 Nuclide Activity 2 Sigma Error MOA Beta 1 39E+OO 8 59E-01 1.39E+OO Mn-54 <3.51E+OO OOOE+OO 3.51E+OO Co-56 <4.48E+OO 0.00E+OO 4.48E+OO Fe-59 <9 34E+OO O.OOE+OO 9.34E+OO Co-{;0 <4.31E+OO 0 OOE+OO 4.31E+OO Zn-6 5 <7.93E+OO O.OOE+OO 7 93E+OO Zr-95 <S.94E+OO 0 OOE+OO 6.94E+OO Nb-95 <4.04E+OO 0 OOE+OO 4 04E+OO 1-131 <1.19E+01 0 OOE+OO 119E+01 Cs-134 <4 94E+OO OOOE+OO 4 94E+OO Cs-137 <4 70E+OO 0 OOE+OO 4 70E+OO Bala-140 <1.10E+01 0 OOE+OO 110E+01 Be-7 <3 81E+01 0 OOE+OO 3 81E+01 K-40 <619E+01 0 OOE+OO S 19E+01 Sample 10: 447966 Sample Dates: 6/19/2017
7/1712017 Nuclide Activity 2 Sigma Error MDA Beta 9.24E-01 9.10E-01 1 51E+OO Mn-54 <2 08E+OO O.OOE+OO 2 08E+OO Co-58 <2 99E+OO 0 OOE+OO 2 99E+OO Fe-59 <6.40E+OO O.OOE+OO 6.40E+OO Co-60 <4 51E+OO OOOE+O O 4 51E+OO Zn-65 <6.64E+OO 0 OOE+OO 6.64E+OO Z r-95 <6.31E+OO O.OO E+OO 8.31E+OO Nb-95 <5.27E+OO 0 OOE+OO 5.27E+OO 1-131 <119E+01 0 OOE+OO 119E+01 Cs-134 <4 1 4E+OO O.OOE+OO 4 14E+OO Cs-137 <4 , 08E+OO 0 OOE+OO 4.0BE+OO Bala-140 <110E+01 O.OOE+OO 11 0E+01 Be-7 <3 93E+01 O.OOE+OO 3.93E+01 K-40 3 07E+01 2 44E+01 3 28E+01 Sample ID: 450056 Sample Dates: 5/22/2017
8114/2017 Nuclide Activity 2 Sigma Error MDA H3DW 4 62E+02 1 32E+02 2 03E+02 Sample 10: 450095 Sample Dates: 7/17/2017
8/1412017 Nuclide Activity 2 Sigma Error MDA Beta 190E+OO 9.19E-01 1 45E+OO Mn-54 <2 52E+OO 0 OOE+OO 2 52E+OO Co-58 <2 65E+OO 0.00E+OO 2.65E+OO Fe-59 <5.31E+OO O.OOE+OO 5.31E+OO Co-60 <1 65E+OO O , OOE+OO 1.65E+OO Zn-65 <6.20E+OO 0.00E+OO 6.20E+OO Zr-95 <5.33E+OO OOOE+OO 5.33E+OO Nb-95 <2.98E+OO O , OOE+OO 2 98E+OO 1-131 <1.04E+01 0.00E+OO 1.04E+01 Report Generated@

3/21/2018 14: 30: 38 c (!ID EnRad Laborator ies Append ix E -Page 57 of 93 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersville , North Carolina 28078 OCONEE Radiological Environmental Monitoring Analysis Report*~ 2017 (Appendix E) Media Type: DRINKING WATER Concentration (Activity)

pCi/1 Sample Point 066 [INDICATOR*

SSE@ 18.9 miles] Sample ID: 450095 Sample Dales: 7/17/2017

8/1412017 Nuclide Activity 2 Sigma Error MDA Cs-134 <2.86E+OO OOOE+OO 2 86E+OO Cs-1 37 <2 99E+OO O.OOE+OO 2 99E+OO Bala-140 <4 54E+OO OOOE+OO 4.64E+OO Be-7 <2 15E*01 0 OOE+OO 2 15E+01 K-40 2 87E+01 2.41E+0 1 3 , 72E+01 Sample ID: 451828 Sample Dales: 811412017.

9/11/2017 Nuclide Activity 2 Sigma Error MDA Beta 9.48E-01 7 53E-01 1.24E+OO Mn-54 <3 08E+OO O.OOE+OO 3'08E+OO Co-58 <4 2 7E+OO 0.00E+OO 4 27E+OO F e-59 <5.88E+OO O.OOE+OO 5.88E+OO Co-60 <3.22E+OO O.OOE+OO 3 22E+OO Zn-65 <5.45E+OO O.OOE+OO 5.45E+OO Zr-95 <5.80E+OO O.OOE+OO 5 80E+OO Nb-95 <3.87E+OO O.OOE+OO 3.67E+OO 1-131 <1.15E+01 0 OOE+OO 1 *15E+01 Cs-134 <3.08E+OO 0 OOE+OO 3 08E+OO Cs-13 7 <2.69E+OO 0 OOE+OO 2 69E+OO Bala-140 <8.32E+OO 0 OOE+OO 8 32E+OO Be-7 <3.26E+01 0 OOE+OO 3 26E+01 K-40 <5.60E+01 OOOE+OO 5 60E+01 Sample 10: 454592 Sample Dates: 9/11/2017 -1019/2017 Nuclide Activity 2 Sigma Error MOA Beta 918E-01 8.49E-01 140E+OO Mn-54 -<2 07E+OO 0.0 0E+OO 2.07E+OO Co-58 <2 15E+OO 0 OOE+OO 2 15E+OO Fe-59 <4 85E+OO O.OOE+OO 4 85E+OO Co-60 -<2 15E+OO O.OOE+OO 2 15E+OO Zn-65 " 5 59E+OO 1 0.00E+OO 5 59E+OO Zr-95 <460E+OO O.OOE+OO 4 , 60E+OO Nb-95 <2 14E+OO O.OOE+OO 2.14E+OO 1-131 <1 06E+01 0.00E+OO 1 08E+01 Cs-134 <2 23E+OO 0.00E+OO 2 23E+00 Cs-137 <2 54E+OO OOOE+OO 2 54E+OO Bala-140 <6.16E+OO 0 OO E+OO 6 16E+OO Be-7 <1 94E+01 0 OOE+OO 1 94E+01 K-40 5 17E+01 2.47E+01 3 38E+01 Sample 10: 461753 Sample Dates: 10/9/2017. 11/612017 Nuclide Activity 2 Sigma Error MOA Beta 1.38E+OO 9 16E-01 1 SOE+OO Mn-54 <2.22E+OO 0 OOE+OO 2 22E+OO Co-58 <3.75E+OO O.OOE+OO 3-75E+OO Fe-59 <6.83E+OO O.OOE+OO 6.83E+OO Co-60 <3.86E+OO O.OOE+OO 3.86E+OO Zn-65 <6 36E+OO O.OOE+OO 6.36E+OO Zr-95 <7 85E*OO O.OOE+OO 7.85E+OO Nb-95 <4 98E+OO 0.00E+OO 4.98E+OO 1*131 <114E+01 O.OOE+OO 1.14E+01 Cs-134 <4 21E+OO O.OOE+OO 4.21E+OO Cs-137 <4 20E+OO O.OOE+OO 4.20E+OO B La*14 0 <9.62E+OO O.OOE+OO 9.62E+OO Be--7 <3.65E+01 O.OOE+OO 3.65E+01 K-40 <6.60E+01 O.OOE+OO 6 60E+01 Sample 10: 462377 Sample Dales: 8/1412017 -121412017 Nuclide Activity 2 Sigma Error MOA H30W 3 78E+02 1 22E+02 1.90E+02 Sample 10: 463809 Sample Oates: 111612017 -1214/2017 Nuclide Activity 2 Sigma Error MOA Beta 1.29E+OO 8.73E-01 1 42E+OO Mn-54 <3.49E+OO O.OOE+OO 3.49E+OO Co-5 8 <3 27E+OO O.OOE+OO 3.27E+OO Fe-59 <7 81E+OO O_OOE+OO 7.81E+OO Co-60 <317E+OO O.OOE+OO 3.17E+OO Zn-65 <4 94E+OO O.OOE+OO 4.94E+OO Zr-95 <5 27E+OO O.OOE+OO 5.27E+OO Nb-95 <4 18E+OO O.OOE+OO 4.18E+OO 1-131 <1 07E+01

O.OOE+OO 1.07E+01 C s-134 <3.26E+OO O.OOE+OO 3.26E+OO Report Generated@

3/21/2018 14: 30 38 c[ffi) EnRad L aboratories Appendix E

Page 58 of 93 Duke Energy Annual Report. Appendix E 13339 Hagers Ferry Road Huntersvilfe, North Carol i na 28078 OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: DRINKING WATER Concentration (Activity):

pCi/1 Sample Point 066 [ INDICATOR -SSE @ 18.9 miles J Sample ID: 463809 Sample Dates: 11/6/2017 -12/4/2017 Nuclide Cs-137 Bala-140 Be-7 K-40 Sample ID: 465396 Sample Dates: 12/4/2017 -112/2018 Nuclide Beta Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr-95 Nb-95 1-13 1 Cs-134 Cs-13 7 Bala-140 Be-7 K-40 H3DW Media Type: FISH Concentration (Activity)

pCi/kg wet Sample Point 060 [ CONTROL FISH/ INDICATOR

-NE@ 3.23 miles) Sample ID: 439871 Sample Oates: 4/512017 -4/5/2017 Sample ID: 439872 Sample Dates: 4/5/2017 -4/5/2017 Sample ID: 454950 Sample Oates: 10/17/2017 -10120/2017 Report Generated@ 3/21/2018 14: 30: 38 Duke Energy Annual Report -Appendix E FREESWIM Nuclide Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 1-131 Cs-134. Cs-137 Be-7 K-40 Ag-110M Sb-122 Sb-125 BOTMFEEDER Nuclide Mn-54 Co-56 Fe-59 Co-60 Zn-65 Nb-95 1-13 1 Cs-134 Cs-137 B e-7 K-40 Ag-110M Sb-122 Sb-125 FREESWIM Nuclide Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 1-131 Cs-134 Cs-137 Be-7 EnRad Laboratories 13339 Hagers Ferry Road Huntersville , North Ca r o li na 28078 Activity <3 1SE+OO <6 35E+OO <2 83E+01 9 93E+01 Activity 1 89E+OO <1.93E+OO <2.19E+OO <3.84E+OO <1 70E+OO <3 98E+OO <4 33E+OO <3 17E+OO <1 17E+01 <2 24E+OO <2 04E+OO <5 27E+OO <1.65E+01 5.37E+01 5.63E+02 Activity <1 71E+01 <1 34E+01 <2 15E+01 <1 64E+01 <4.37E+01 <2 OOE+01 <2 16E+01 <2 15E+01 <2.27E+01 <113E+02 3.21E+03 <1.67E+01 <8 31E+01 <3 62E+01 Activity <1 88E+01 <1 47E+01 <4.18E+01 <2 07E+01 <4.43E+01 <1.28E+01 <2 46E+01 <1 78E+01 <2 57E+01 <8 11E+01 318E+03 <1 24E+01 <7 29E+01 <3.72E+01 Activity <3.96E+01 <6 27E+01 <2 38E+01 <6 42E+01 <1 01E+02 <4 95E*01 <4.48E+01 <4 93E+01 <4.97E+01 <3 12E+02 2 Sigma Error MDA 0.00E+OO 316E+OO O.OOE+OO 6.35E+Otl O.OOE+OO 2 83E+0 1 3.43E+01 3.66E+01 2 Sigma Error MDA 8 74E-01 1 37E+OO 0 OOE+O O 1 93E+OO 0 OOE+OO 2 19E+OO 0 OOE+OO 3 84E+OO 0 OOE+OO 1 70E+OO 0 OOE+OO 3.98E+OO 0.00E+OO 4 33E+OO O.OOE+OO 3.17E+OO O.OOE+OO 117E+01 O.OOE+OO 2.24E+OO O.OOE+OO 2.04E+O O O.OOE+OO 5.27E+OO O.OOE+OO 1.65E+01 2.23E+01 3 06E+01 1.17E+02 1 68E+02 2 Sigma Error MDA O.OOE+OO 1 71E+01 O.OOE+OO 1.34E+01 O.OOE+OO 2 15E+01 O.OOE+OO 1 64E+01 0.00E+OO 4 37E+01 O.OOE+OO 2 OOE+01 O.OOE+OO 2 16E+01 o OOE+OO 2 15E+0 1 0 OOE+OO 2 27E+01 0 OOE+OO 113E+0 2 5 80E+02 3 82E+02 0.00E+OO 1 67E+01 O.OO E+OO 8.31E+01 O.OOE+OO 3.62E+01 2 Sigma Error MDA 0.00E+OO 1 88E+01 0 O OE+OO 1.47E+01 0 OOE+OO 4 18E+0 1 0 OOE+OO 2 07E+0 1 OOOE+OO 4 43E+01 0 OOE+OO 1 28E+01 O.OOE+OO 246E+01 O.OOE+OO 1.78E+01 O.OOE+OO 2 57E+01 O.OOE+OO 8 1 1E+01 5 76E+02 3.02E+02 0 OOE+OO 1 24E+01 O.OOE+OO 7 29E+01 0 OOE+O O 3 72E+01 2 Sigma Error MDA 0 OOE+OO 3 96E+01 0 OOE+OO 6 27E+01 0 OOE+OO 2.38E+01 O.OOE+OO 6.42E+01 O.OOE+OO 1.01E+02 0 OOE+OO 4.95E+01 0 OOE+OO 4.48E+01 O.OOE+OO 4.93E+01 OOOE+OO 4 97E+0 1 0 OOE+OO 3 12E+02 Append ix E -Page 59 of 93 OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: FISH Concentration (Activity)

pCilkg wet Sample Point 060 [ CONTROL FISH/ INDICATOR

-NE@ 3.23 miles] Sample ID: 454950 Sample Dates: 10/17/2017 -10/2012017 FREESWIM Nuclide Activity 2 S igma Error MDA K-40 3 43E+03 9.0 5E+02 1 45E+02 Ag-110M <5.03E+01 0 OOE+OO 5 03E+01 Sb-122 <2.38E+02 O.OOE+OO 2 36E+02 S1r125 <1 09E+02 0.00E+OO 1 09E+02 Sample ID: 454951 Sample Dates: 10/19/2017 -10120/2017 BOTMFEEDER Nuclide Activity 2 Sigma Error MOA Mn-54 <2 6 2E+01 0 OOE+OO 2 , 62E+01 Co-58 <3.12E+0 1 0 OOE+OO ~.1 2E+01 Fe-59 <7.83E+0 1 OOOE+OO 7 83E+01 Co-60 <2 53E+0 1 0 O OE+OO 2.53E+01 Zn-65 <7.20E+O\ OOOE+OO 7.20E+01 Nb-95 <3 55E+01 O.OOE+OO 3 5 5E+01 1-131 <3 \2E+01 O.OOE+OO 3 \2E+01 Cs-134 <3 93E+O\ O.OOE+OO 3 9 3E+01 Cs-137 <3.58E+01 O.OOE+OO 3 56E+01 Be-7 <1 98E+02 0.00E+OO 1 98E+02 K-40 2.5SE+03 6 9 1 E+02 5.62E+02 Ag-110M <1.49E+0 1 O.OOE+OO 1 49E+01 Sb-122 <1 11E+0 2 0 OOE+OO 1.11E+02 Sb-125 <7.39E+01 OOOE+OO 7.39E+01 Sample Point 063 [ INDICATOR -ESE@ 0.8 miles] Sample ID: 439873 Sample Dates: 416/2017 -4/612017 BOTMFEEDER Nuclide Actl11lty 2 Sigma Error MDA Mn-54 <3 46E+01 O.OOE+OO 3 4 6E+01 Co-56 <3 23E+01 O.OOE+OO 3 23E+01 Fe-59 <6 77E+01 O.OOE+OO 6 77E+01 Co-60 <2 64E+01 0.00E+OO 2.64E+01 Zn-65 <6.27E+01 0 OOE+OO 6.27E+01 Nb-95 <3.52E+01 0 OOE+OO 3.52E+O\ 1-13 1 <3 39E+01 0 OOE+OO 3 39E+01 Cs-134 <416E+01 OOOE+OO 4.16 E+01 Cs-137 <4.02E+01 0 OOE+OO 4.02E+01 Be-7 <2 65E+02 0 OOE+OO 2 65E+02 K-40 3 68E+03 8.35E+0 2 4 14E+02 A!}-110M <2 11E+01 O.OO E+OO 2 11E+01 Sb-122 <1 22E+02 O.OOE+OO 1 22E+02 Sb-125 <5.64E+01 O.OOE+OO 5 64 E+01 Sample ID: 439874 Sample Dates: 41612017 -41612017 FREESWIM Nuclide Acll11lty 2 Sigma Error MDA Mn-54 <2.66E+01 O.OOE+OO 2.88E+01 Co-58 <4.75E+01 0 OOE+O O 4 75E+01 Fe-59 <5 90E+01 0 OOE+O O 5.90E+01 Co-60 <5.10E+01 0 OOE+O O 5.10E+01 Zn-65 <7 35E+01 O.OOE+OO 7 3 5E+01 Nb-95 <3.56E+01 O.OOE+OO 3 56E+01 1-131 <4.30E+01 O.OOE+OO 4 30E+01 Cs-134 <4 98E+01 O.O OE+O O 4 9 6E+01 Cs-137 <5.17E+01 O.OOE+OO 5 17E+0 1 Be-7 <3.24E+02 0 OOE+OO 3 24E+02 K-40 4.65E+03 9.38E+02 1 06E+02 Ag-110M <3.66E+01 0 OOE+OO 3.66E+01 Sb-122 <1.49E+0 2 0 OOE+OO 1 49E+0 2 Sb-125 <7.9 0E+01 OOOE+OO 7.90E+01 Sample 10: 454952 Sam pie Dates: 10118/2017 -10/1812017 FREESWIM Nuclide Activity 2 Sigma Error MDA Mn-54 <5.91E+01 O.OOE+OO 5 91E+01 Co-58 <4.85E+0 1 O.OOE+OO 4 85E+01 Fe-59 <8.61E+01 O.OOE+OO 8 61E+01 Co-60 <4.21E+01 O.OOE+OO 4 21E+01 Zn-65 <9.33E+01 0 OOE+OO 9 33E+01 Nb-95 <5.75E+01 O.OOE+OO 5.75E+01 1-131 <9.09E+01 0 OOE+OO 9.09E+01 Cs-134 <5.76E+01 0 OOE+OO 5 76E+01 Cs-137 <7.35E+01 OOOE+OO 7.35E+0 1 Be-7 <4.47E+02 O.OOE+OO 4 47E+0 2 K-40 3.69E+03 1.03E+03 7 22E+02 Ag-110M <3.65E+01 O.OOE+OO 3 65E+01 Report Generated@ 3/21/2018 14: 30: 38 EnRad Laborator i es Appendix E -Page 60 of 93 Duke Energy Annual Report -Append i x E 13339 Hagers Ferry Road Huntersville , North Carolina 28078 OCONEE Radiological Environmental Monitoring Analysis Report. 2017 (Appendix E) Media Type: FISH Concentration (Activity)

pCl/kg wet Sample Point 063 ( INDICATOR

ESE@ 0.8 miles] Sample ID: 454952 Sample Dates: 10/18/2017. 10/18/2017 Sample ID: 454953 Sample Oates: 10/18/2017.

10/18/2017 Sample Point 067 [ INDICATOR

SSE @ 4.34 miles ] Sample 10: 439875 Sample Dates: 4/5/2017
415/2017 Sample ID: 439876 Sample Dales: 4/5/2017. 4/512017 Sample ID: 454954 Sample Dates: 10/18/2017

-10/18/2017 Report Generated@ 3/21/2018 14: 30: 38 Duke Energy Annual Report -Appendix E FREESWIM Nuclide Sb-122 Sb-125 BOTMFEEDER Nuclide Mn-54 Co-58 Fe-59 C<HiO Zn-65 Nb-95 1-131 Cs-134 Cs-137 Be-7 K-40 Ag-110M Sb-122 Sb-125 FREESWIM Nuclide Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 1-13 1 Cs-134 Cs-137 Be-7 K-4 0 Ag-110M Sb-122 Sb-125 BOTMFEEDER Nuclide Mn-54 Co-58 Fe-59 Co-60 Zn-6 5 Nb-95 1-131 Cs-134 Cs-137 B e-7 K-40 Ag-110M Sb-122 Sb-1 2 5 FREESWIM Nuclide Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 1-131 Cs-134 Cs-137 Be-7 K-40 Ag-110M Sb-122 Sb-125 EnRad Laboratories 13339 Hagers Ferry Road Huntersville , North Carolina 28078 Activity <1.95E+02 <1 35E+02 Activ i ty <5.78E+01 <6.79E+01 <7.84E+01 <5.98E+01 <8.30E+01 <4.30E+01 <8.2 3 E+01 <3.62E+01 <5.53E+01 <4.34E+0 2 3.23E+03 <5 71E+01 <2.67E+02 <1 05E+02 Activity <1 55E+01 <1 59E+01 <2 27E+01 <5.02E+OO <4.62E+01 <1.24E+01 <2.8 2 E+01 <2.51E+01 <2 16E+01 <1.41E+02 4 03E+03 <1 57E+01 <7 05E+01 <3 59E+01 Activity <1 52E+01 <1 33E+01 <3.66E+01 <4.22E+-OO <3.60E+01 <1.34 E+01 <161E+01 <1.70E+01 1 73E+01 <1 33E+02 3 54E+03 <1 0 1 E+01 <6 56E+01 <3 87E+01 Activity <2.85E+01 <4 73E+01 <5.46E+01 <4.82E+01 <8.46E+01 <4.17E+01 <4 64E+01 <3 1BE+01 <4 90E+01 <2 64E+02 3 46E+03 <3.73E+01 <2 14E+02 <9.1 4E+01 2 Sigma Error MDA O.OOE+OO 1.95E+02 O.OOE+OO 1.35E+02 2 Sigma Error MOA O.OOE+OO 5 78E+01 O.OOE+OO 6. 79E+01 0 OOE+OO 7.64E+01 O.OOE+OO 5 98E+01 O.OOE+OO 8 30E+01 0 OOE+OO 4.30E+01 O.OOE+OO 8 23E+01 0 OOE+OO 3 62E+01 0 OOE+OO 5 5 3E+OI 0 OOE+OO 4 34E+02 9 51E+02 1 75E+02 OOOE+OO 5 71E+01 0 OOE+OO 2 87E+02 O.OOE+OO 1.05E+02 2 Sigma Error MDA OOOE+OO 1.55E+01 0 OOE+OO 1 59E+01 O.OOE+-00 2 27E+0 1 0 OOE+OO 5.02E+OO 0 OOE+OO 4.62E+0 1 0 OOE+OO 1 24E+01 0 OOE+OO 2 82E+OI 0 OOE+OO 2 51E+01 0 OOE+OO 2 16E+01 0 OOE+OO 1 41E+02 6.44E+02 2 26E+02 O.OOE+OO 1 57E+0 1 O.OOE+OO 7 05E+01 0.00E+OO 3.59E+01 2 Sigma Error MOA O.OOE+OO 1.52E+01 0 OOE+OO 1.3 3 E+01 0 OOE+OO 3.66E+01 0 OOE+OO 4 22E+OO 0 OOE+OO 3.60E+01 0 OOE+OO 1 34E+01 OOOE+OO 1 61E+01 0 OOE+OO 1 70E+01 143E+o1 2 16E+01 O.OOE+OO 1 33E+02 5.62E+02 1.68E+02 O.OOE+OO 1.01E+01 O.OOE+OO 8.56E+01 O , OOE+OO 3.87E+01 2 Sigma Error MDA O.OOE+OO 2.85E+01 OOOE+OO 4.73E+01 OOOE+OO 5.46E+01 0 OOE+OO 4.82E+01 0 OOE+OO 6.46E+01 O.OOE+OO 4 17E+01 O.OOE+O O 4.64E+0 1 O.OOE+OO 3.18E+01 O.OOE+OO 4 90E+01 O.OOE+OO 2.64E+0 2 8.3 8E+02 1.22E+02 O.OOE+OO 3.73E+01 O.OOE+OO 2 14E+02 0 OOE+OO 9.14E+01 Appendix E

Page 61 of 9~

OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: FISH Concentration (Activity)

pCi/kg wet Sample Point 067 [ INDICATOR

SSE @ 4.34 miles ] Sample ID: 454955 Sample Dates: 10/19/2017

-10/19/2017 Media Type: MILK Concentration (Activity)

pCi/1 Sample Point 071 [CONTROL* SSE@ 10.2 miles J Sample ID: -432946 Sample Dates: 1/9/2017 -1/9/2017 Sample ID: 433761 Sample Dates: 1/23/2017 , 1 1 23/2017 Sample ID: 435151 Sample Dates: 2/8/2017 -2/8/2017 Sample ID: 436300 Sample Dates: 2/20/2017. 2120/2017 Sample ID: 437631 Sample Dates: 3/6/2017 -3/6/2017 Sample ID: 438845 Sample Dates: 3/20/2017. 3/20/2017 Report Genera t ed@ 3/21/2018 14 30'38 Duke Energy Annual Report -Appendix E BOTMFEEDER Nuclide Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 1-131 Cs-134 Cs-137 Be-7 K-40 Ag-110M Sb-122 Sb-125 Nuclide L L l-1 31 1-131 C s-134 C s-137 Bal a-140 Be-7 K-40 Nuclide L U-131 1*1 31 C s-134 C s-137 Bala-140 Be-7 K-40 Nuclide LU-131 1-1 31 Cs-134 Cs-137 Bala-140 fle.7 K-40 Nuclide LU-131 1-131 Cs-134 Cs-137 Bala-140 Be-7 K-40 Nuclide LLl-1 31 1-131 Cs-134 Cs-137 Bala-140 Be-7 K-40 Nuclide LLl-131 1-131 Cs-134 Cs-137 EnRad Laboratories 13339 Hagers Ferry Road Huntersville , North Carolina 28078 Activity <2 89E+01 <2 51E+01 <5 87E+01 <2.20E+01

<4 87E+01 <3 63E+01 <3.04E+01 <2 75E+01 <3.28E+01 <1.88E+02 2 58E+03 <2.49E+01 <1.23E+02 <4 38E+01 Activity <6.16E--01 <7.44E+OO <3.66E+OO <5.57E+OO <7.55E+OO <5.62E+01 1.40E+03 Activity <5.88E-01 <6.42E+OO <7.88E+OO <9.33E+OO <2.19E+OO <4.65E+01 1.54E+03 Activ i ty <5.27E-01 <7.13E+OO <8.25E+OO <9.74E+OO <2.44E+OO <5.19E+01 1.41E+03 Activity <5.82E-01 <7.67E+OO <7.40E+OO <7.73E+OO <7.55E+OO <5.40E+01 1.41E+03 Activity <6.46E--01 <8.06E+OO <6.82E+OO <9.10E+OO <9.42E+OO <5.58E+01 1.68E+03 Activity ~.30E-01 <8.10E+OO <9.47E+OO <7.08E+OO 2 Sigma Error MDA O.OOE+OO 2 89E+01 0.00E+OO 2.51E+01 O.OOE+OO 5.87E+01 O.OOE+OO 2 20E+01 O.OOE+OO 4.87E+01 0 OOE+OO 3.63E+01 O.OOE+OO 3.04E+01 O.OOE+OO 2 75E+01 0 OOE+OO 3.28 E+0 1 0 O OE+OO 1 88E+0 2 5 98E+02 8.14E+01 0 OOE+OO 2.49E+01 0 OOE+OO 1 23E+02 0 OOE+OO 4.38E+01 2 S i gma Error MDA 0 OOE+OO 6.1SE-01 O.OOE+OO 7.44E+OO O.OOE+OO 3.86E+OO 0.00E+OO 5.57E+OO O.OOE+OO 7.55E+OO 0.00E+OO 5.62E+01 2 23E+02 6.99E+01 2 Sigma Error MDA 0 OOE+OO 588E-01 0 OOE+OO 6.42E+OO 0 OOE+OO 7.88E+OO 0 OOE+OO 9.33E+OO 0 OOE+OO 2.19E+OO 0 OOE+OO 4.6SE+01 2 4 0E+02 1.05E+0 2 2 Sigma Error MDA O.OOE+OO 5.27E-01 O.OOE+OO 7 13E+OO O.OOE+OO 8 25E+OO O.OOE+OO 9 74E+OO 0.00E*OO 2 44E+OO 0.00E+OO 5 19E+01 2.32E+02 8 39E+01 2 Sigma Error MDA O.OOE*OO 5 82E-0 1 O.OOE*OO 7.67E+OO O.OOE+OO . 7 40E+OO O.OOE+OO 7 73E+OO O.OOE+OO 7 55E+O O 0 OOE+OO 5.40E+01 2 24E+02 7.84E+01 2 S i gma Error MDA O.OOE+OO 6.46E-0 1 O.OOE+OO 8 06E+OO O.OOE+OO 6 82E+OO O.OOE*OO 9 10E+OO 0.00E+OO 9 42E+OO O.OOE+OO 5 58E+01 2.53E+02 1 8SE+01 2 Sigma Error MDA 0.00E+OO 6 30E-01 O.OOE+OO 8.10E+OO O.OOE+OO 9.47E+OO OOOE+OO 7.08E+OO Appendix E -Page 62 of 93 OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: MILK Concentration (Activity)

pCi/1 Sample Point 071 (CONTROL*

SSE@ 10.2 miles) Sample ID: 438845 Sample Dates: 3/2012017

3/2012017 Nuclide Activity 2 Sigma Error MDA Bala-140 <6.73E+OO O.OOE+OO 6.73E+OO Be-7 <5.90E+01 0 OOE+OO 5.90E+01 K-40 1.57E+03 2 50E+02 1.20E+02 Sample 10: 440053 Sample Oates: 4/3/2017 -4/3/2017 Nuclide Activity 2 Sigma Error MOA LLl-131 <5.89E-01 O.OOE+OO 5 89E-01 1-1 31 <9.71E+OO O.OOE+OO 9.71E+OO Cs-134 <9.01E+OO 0.00E+OO 9.01E+OO Cs-137 <9.44E+OO O.OOE+OO 9.44E+OO BaLa-140 <9.73E+OO O.OOE+OO 9.73E+OO Be-7 <5.36E+01 O.OOE+OO 5.36E+01 K-40 1.58E+03 2.47E+02 7.96E+01 Sample ID: 441453 Sample Oates: 4/17/2017

-4/17/2017 Nuclide Activity 2 Sigma Error MDA LLl-131 <5 47E-01 O.OOE+OO 5 47E-01 1-131 <5.22E+OO O.OOE+OO 5.22E+OO Cs-134 <8 72E+OO O.OOE+OO 8 72E+OO Cs-137 <7 34E+OO O.OOE+OO 7 34E+OO BaLa-140 <2 19E+OO O.OOE+OO 2 19E+OO Be-7 <4 06E+01 0 OOE+OO 4 06E+01 K-40 1.47E+03 2.33E+02 1 06E+02 Sample ID: 442370 Sample Dates: 5/112017 -5/112017 Nuclide Activity 2 Sigma Error MDA LLl-131 <5.26E-01 OOOE+OO 5 26E-01 1-131 <5.09E+OO 0 OOE+OO 5.09E+OO Cs-134 <9.24E+OO 0.00E+OO 9.24E+OO Cs-137 <8.17E+OO O.OOE+OO 8.17E+OO BaLa-140 <9.27E+OO O.OOE+OO 9.27E+OO Be-7 <4.90E+01 O.OOE+OO 4.90E+01 K-40 1 43E+03 2.3 2E+02 8.49E+01 Sample ID: 443346 Sample Dates: 5/1512017

511512017 Nuclide Activity 2 Sigma Error MOA LLl-1 31 <6 26E-01 O.OOE+OO 6 26E-01 1-131 <7.32E+OO O.OOE+OO 7.32E+OO Cs-134 <7.6BE+OO O.OOE+OO 7.68E+OO Cs-13 7 <6 22E+OO O.OOE+OO 6 22E+OO Bala-140 <1 13E+01 O.OOE+OO 113E+01 Be-7 <5 82E+01 O.OOE+OO 5 82E+01 K-4 0 1 54E+03 2.45E+02 8 52E+01 Sample ID: 444305 Sample Dates: 5/30/2017
5/30/2017 Nuclide Activity 2 Sigma Error MDA LLl-1 3 1 <6.07E-01 0 OOE+OO 6 07E-01 1-131 <7.97E+OO 0 OOE+OO 7 97E+OO Cs*\34 <9.01E+OO OOOE+OO 9.01E+OO Cs-1 3 7 <B.36E+OO O.OOE+OO 8.36E+OO Bala-140 <6.66E+OO O.OOE+OO 6.66E+OO Be-7 <6 13E+01 O.OOE+OO 613E+01 K-40 1.34E+03 2.23E+02 7.47E+01 Sample 10: 446367 Sample Dates: 6/12/2017

-6/12/2017 Nuclide Activity 2 Sigma Error MDA LLl-131 <6.16E-01 O.OOE+OO 616E-01 1-131 <7 12E+OO O.OOE+OO 7 12E+OO C s-134 <1 02E+01 O.OOE+OO 1 02E+01 Cs-137 <1 04E+01 O.OOE+OO 1 04E+01 Ba a*140 <2 43E+OO 0 OOE+OO 2 43E+OO B e 0 7 <4 87E+01 0 OOE+OO 487E+01 K-40 1 44E+03 2 32E+02 1 92E+01 Sample ID: 447239 Sample Dates: 6/2612017 -6/26/2017 Nuclide Activity 2 Sigma Error MDA LLl-131 <6 09E-01 0 OOE+OO 6.09E-01 1-131 <7.17E+OO O.OOE+OO 7 17E+OO Cs-134 <7.40E+OO 0.00E+OO 7.40E+OO Cs*137 <8.08E+OO O.OOE+OO 8.08E+OO BaLa-14 0 <6.24E+OO O.OOE+OO 6.24E+OO Be ,7 <5.68E+01 O.OOE+OO 5.68E+01 K-40 1.42E+03 2.26E+02 912E+01 Sample 10: 448317 Sample Oates: 7/10/2017 -7J10/2017 Nuclide Activity 2 Sigma Error . MDA LLl-131 <5.67E-01 O.OOE+OO 5.67E-01 Report Generated@ 3/21/2018 14: 30*38 c (i ffi) EnRad Laborato es Append i x E -Page 63 of 9~ Duke Energy Annua l Report

Appendix E 13339 Hagers Ferry Road Huntersville North Carolina 28078 OCONEE Radiological Environmental Monitoring Analysis Report* 2017 (Appendix E) Media Type: MILK Concentration (Activity)

pCl/1 Sample Point 071 [CONTROL*

SSE@ 10.2 miles) Sample ID; 448317 Sample Dates: 7/10/2017 -7/10/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <8.35E+OO 0 OOE+OO 8 35E+OO Cs-134 <5.63E+OO 0 OOE+OO 5 63E+OO Cs-137 <7.71E+OO 0 OOE+OO 7.71E+OO Bala-140 <7.53E+OO 0 OOE+OO 7 53E-+OO Be-7 <4.06E-+01 0 OOE+OO 4.06E+01 K-40 1.47E-+03 2 3 3E+02 1.10E+0 2 Sample ID: 449262 Sample Dates: 7/24/2017 -7/24/2017 Nuclide Activity 2 Sigma Error MDA LLl-13 1 <5.93E-01 0.00E-+00 593E-01 1-131 <7.25E+OO O.O O E+OO 7.25E+OO Cs-134 <9.46E+OO O.OOE+OO 9.46E+OO Cs-137 <6.58E+OO O.OOE+OO 6 58E+OO Bala-140 <6.42E+OO O.OOE+OO 6.42E+OO Be-7 <5.31E+01 O.OOE+OO 5.31E+01 K-40 1.51E+03 2.48E+02 1 38E.+02 Sample ID: 450253 Sample Dates: 81712017 -817/2017 Nuclide Activity 2 Sigma Error MDA LLl-13 1 <642E-01 O.OOE+OO 6.4 2 E-01 1-131 <7 18E+OO O.OOE+OO 7 18E+OO Cs-134 <9.B2E+OO OOOE+OO 9 82E+OO Cs-13 7 <9.39E+OO OOOE+OO 9 39E+OO Bala-140 <2.45E+OO 0 OOE+OO 245E+OO Be-7 <4 53E+01 OOOE+OO 4.53E+01 K-40 1.42E+03 2 30E+02 1.92E+01 Sample ID: 451230 Sample Dates: 8/21/2017 -8/21/2017 Nuclide Activity 2 Sigma Error MDA LU-131 <5.33E-01 O.OOE+OO 5 33E-01 1-131 <6 95E+OO O.OOE+OO 6.95E+OO Cs-134 <6.30E+OO 0.00 , E+OO 6 30E+OO Cs-137 <7 73E+OO O.OOE+OO 7.73E+OO Bala-140 <B.74E+OO O.OOE+OO 8 74E+OO Be-7 <5.16E+01 0.00E+OO 516E+01 K-40 1.48E+03 2 31E+02 7 73E+01 Sample ID: 452411 Sample Dates: 915/2017

9/5/2017 Nuclide Activity 2 Sigma Error MDA LU-131 <6 39E-01 0 OOE+OO 6.39E-0 1 1-131 <5.BOE+OO 0 OOE+OO 5 BOE+OO Cs-134 <9 75E+OO OOOE+OO 9.75E+OO Cs-137 <8 21E+OO O.OOE+OO 8.21E+OO Bala-140 <8 38E+OO O.OOE+OO 8.38E+OO Be-7 <4 15E+01 O.OOE+OO 4.15E+01 K-40 1 33E+03 2.24E+02 6.01E+0 1 Sample ID: 453485 Sample Dalee: 9/1812017

-9/18/2017 Nuclide Activity 2 Sigma Error MDA LU-131 <4.99E-01 O.OOE+OO 4 99E-01 1-131 <6.96E+OO 0.00E+OO 6.96E+OO Cs-134 <6.88E+OO O.OOE+OO 688E+OO Cs-137 <5.57E+OO O.OOE+OO 5 57E+OO Bala-140 <7 55E+OO O.OOE+OO 7 55E+OO Be-7 <4.65E+01 0 OOE+OO 4 65E+01 K-40 1.44E+03 2 27E+02 81 1 E+01 Sample ID: 455121 Sample Dates: 1012/2017 -1012/2017 Nuclide Activity 2 Sigma Error MDA LLl-131 <5.36E-01 0.00E+OO 5 36E-01 1-131 <8 04E+OO O.OOE+OO 8.04E+OO Cs-134 <5 65E+OO O.OOE+OO 5.65E+OO Cs-137 <6.0BE+OO O.OOE+OO 6.0BE+OO Bala-140 <6.28E+OO O.OOE+OO 6.28E+OO Be-7 <6.11E+01 O.OOE+OO 6.11E+01 K-40 1.47E+03 2.27E+02 1 73E+01 Sample ID: 456083 Sample Dates: 1 0/1612017 -10/16/2017 Nuclide Activity 2 Sigma Error MDA LLl-131 <5.58E-01 0 OOE+OO 5.58E-0 1 1-131 <7.44E+OO 0 OOE+OO 7.44E+OO Cs-134 <7 74E+OO 0 OOE+OO 7.74E+OO Cs-137 <6 1 0E+OO 0.00E+OO 8.10E+OO Bala-140 <2 36E+OO O.OOE+OO 2.36E+OO Be-7 <4 92E+01 O.OOE+OO 4.92E+01 K-40 1 33E+03 2.20E+02 9.47E+01 Report Generated@ 3/21/2018 14: 30: 38 E a@ EnRad Laboratories Appendix E

Page 64 of 93 Duke Energy Annual Report -Appendix E 13339 H a g e r s Ferry Road Huntersville , North Carolina 28078 OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: MILK Concentration (Activity)

pCi/1 Sample Point 071 [ CONTROL -SSE@ 10.2 miles] Sample ID: 462005 Sample Oates: 10/30/2017

10/30/2017 Nuclide LLl-131 1-13 1 Cs-134 Cs-137 Bala-140 Be-7 K-40 Sample ID: 463133 Sample OatH: 11/13/2017

-11/13/2017 Nuclide LLl-1 31 1-131 Cs-134 Cs-137 Bala-140 Be-7 K-40 Sample ID: 464184 Sample Oates: 11/27/2017 -11/27/2017 Nuclide LLl-131 1-131 Cs-134 Cs-137 Ba l a-140 Be-7 K-40 Sample 10: 465007 Sample Oates: 12/11/2017 -12/11/2017 Nuclide LLl-131 1-131 Cs-134 Cs-137 Bala-140 Be-7 K-40 Sample ID: 465664 Sample Oates: 12/26/2017 -12/26/2017 Nuclide LLl-1 3 1 1-131 Cs-134 Cs-137 Bala-140 Be-7 K-40 Media Type: SEDIMENT_SHORE Concentration (Activity)

pCi/kg Samp l e Point 067 ( INDICATOR

-SSE@ 4.34 miles] Sample 10: 437633 Sample Oates: 3/20/2017

3/20/2017 Sample ID: 452412 . Sample Oates: 9/1812017

-9/18/2017 Report Generated@ 3/21/201814

30: 38 Duke Energy Annual Report -Appendix E Nuclide Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr-95 Nb-95 1-131 Cs-134 Cs-137 Be-7 K-40 Co-57 Mo-99 Ag-1 1 0M Sb*122 Sb-1 25 Nuclide Mn-54 EnRad Laborator i es 13339 Hagers Ferry Road H u ntersville , North Carolina 28078 Activity <6.36E-01 <6.40E+OO <5.91E+OO <6.85E+OO <7 77E+OO <5.41E+01 1 39E+03 Activity <5 21E-01 <6 24E+OO <1.07E+01 <6 03E+OO <6 36E+OO <4 38E+01 1.4SE+03 Activ i ty <6.06E-01 <8.79E+OO <6.88E+OO <6.96E+OO <6.30E+OO <6.87E+01 1.43E+03 Activity <6 02E-01 ,:=8.28E+OO <1.03E+01 <8.36E+OO <8 10E+OO <5 31E+01 1 60E+03 Activity <6.49E-01 <6.32E+OO <7 88E+OO <6.08E+OO <2 30E+OO <5.22E+01 1 49E+03 Activity <3.40E+01 <2 37E+01 <.t 7SE+01 <2 83E+01 <4 50E+01 <4 99E+01 <2 92E+01 <3.53E+01 <3.91E+01 3.86E+01 <2.43E+02 113E+04 <2 12E+01 <1.02E+03 <2 11E+01 <1 89E+02 <5 61E+01 Activity <3.96E+01 2 S igma Error MOA OOOE+OO 6.36E-01 0 OOE+OO 6.40 E+OO OOOE+OO 5.91E+OO OOOE+OO 6.85E+OO 0 OOE+OO 7.77E+OO O.OOE+OO 5.41E+01 2 25E+02 9.33E+01 2 Sigma Error MOA O.OOE+OO 5 21E-01 O.OOE+OO 6.24E+OO O.OOE+OO 1.07E+01 O.OOE+OO 6.03E+OO O.OOE+OO 6.36E+OO O , OOE+OO 4.3SE+01 2.45E+02 1.38E+02 2 Sigma Error MOA O.OOE+OO 6.0 6E-0 1 O.OOE+OO 8 79E+OO O.OOE+OO 6 88E+OO O.OOE+OO 6.96E+OO O.OOE+OO 6.30E+OO 0.00E+OO 6.87E+01 2 29E+02 9.84E+01 2 S igma Error MOA 0 OOE+OO 6 02E-01 0 OOE+OO 8.28E+OO O.OOE+OO 1.03E+01 O.OOE+OO 8.36E+OO O.OOE+OO 8.10E+OO O.OOE+OO 5.31E+01 2.55E+02 1 31E+02 2 Sigma Error MOA O.OOE+OO 6.49E-01 O.OOE+OO 6 32E+OO O.OOE+OO 7 88E+OO O.OOE+OO 6 08E+OO O.OOE+OO 2 30E+OO 0 OOE+OO 5 22E+01 2 40E+02 1 38E+02 2 Sigma Error MOA OO OE+OO 3.40E+01 0 OOE+OO 2 37E+01 0.00E+OO 4.78E+01 0.00E+OO 2.83E+01 O.OOE+OO 4 50E+01 O.OOE+OO 4 99E+01 O.OOE+OO 2 92E+01 O , OOE+OO 3 53E+01 O.OOE+OO 39 1 E+01 3 88E+01 2 55E+01 0 OOE+OO 2 43E+02 1 20E+03 3.11E+02 OOOE+OO 2 12E+01 0 OOE+OO 1 02E+03 O.OOE+OO 2.1 1E+01 0 OOE+OO 1 89E+0 2 0 OOE+OO 5.61E+01 2 Sigma Error MOA O.OOE+OO 3.96E+01 Appendlx E -Page 65 of 93 OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: SEDIMENT_SHORE Concentration (Activity)

Sample Point 067 ( INDICATOR

-SSE @ 4.34 mi les J Sample 10: 452412 Sample Oates: 9/18/2017 -9/1 8 1 2 0 17 Sample Point 068 [ CONTROL

W @ 1.82 miles ) Sample ID: 437634 Sample Dates: 3/20/2017
3/2012017 Sample ID: 452413 Sample Dates: 911812017

-9118/2017 Sample Point 091 [ INDICATOR

S @ 2.09 miles] Sample 10: 437636 Sample Dataa: 3/2012017

-3/2012017 Report Generated@ 3/21/2018 14: 30: 38 Duke Energy Annual Report -Appendix E pCl/kg Nuclide Co-58 Fe-59 Co-60 Zn-65 Zr-95 Nt>-95 1-131 Cs-134 Cs-137 Be-7 K-40 Co-57 Mo-99 Ag-110M Sb-1 22 Sb-125 Nuclide Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr-95 Nb-95 1-13 1 Cs-134 Cs-137 Be-7 K-40 C o-57 M o-99 Ag-110M Sb-122 Sb-125 Nuclide Mn-54 Co-58 Fe-59 Co.SO Zn-65 Zr-95 Nb-95 1-131 Cs-134 Cs-13 7 Be-7 K-40 Co-57 Mo-99 Ag-110M Sb-122 Sb-125 Nuclide Mn-54 Co,58 Fe-59 c~o Zn-65 Zr*95 Nb-95 1-131 EnRad Labo ratories 13339 Hagers Ferry Road Huntersville. North Carolina 28078 Activity <2.30E+01 <5 75E+01 .-2 56E+01 <7 07E+01 <5 07E+01 <3 30E+01 <3 27E+01 <5 01E+01 7 61E+01 1 55E+02 2 10E+04 <2 62E+01 <4 79E+02 <3.05E+01 <7.20E+01 <6.97E+01 Activity <1 26E+01 <1 62E+01 <3.81E+01 <1 31E+01 <3.48E+01 <2.90E+01 <2 07E+0 1 <1 78E+01 <2 02E+01 <1 66E+01 1 82E+02 5 50E+03 <1 26E+01 <5 82E+02 <1 67E+01 <1 02E+02 <3 60E+01 Activity <1 98E+-0 1 <1 38E+-0 1 <3.02E+-0 1 <1.99E+01 <3 79E+01 <3.06E+01 <1 78E+0 1 <1 69E+0 1 <2 12E+0 1 <2 31E+0 1 <1 87E+02 5 96E+03 <1 51E+0 1 <2 74E+02 <1 74E+01 <4 62E+01 <3.60E+01 Activity <3.16E+01 <3 38E+01 .-7 41E+01 <3.60E+0 1 <6 72E+0 1 <5 89E+01 <3 70E+01 <4 33E+01 2 Sigma Erro r MDA 0 OOE+OO 2 30E+01 0 OOE+OO 5 75E+01 0 OOE+OO 2 56E+01 OOOE+OO 7 07E+01 0 OOE+OO 5 07E+01 0 OOE+OO 3 30E+01 0 OOE+OO 3 27E+01 0 OOE+OO 5 01E+01 3 58E+01 5 32E+01 2.22E+02 3 67E+02 2 01E+03 4.31E+02 0.00E+OO 2 62E+01 0.00E+OO 4.79E+02 O.OOE+OO 3.05E+01 O.OOE+OO 7.20E+01 O.OOE+OO 6 97E+01 2 Sigma Error MOA O.OOE+OO 1.26E+01 0 OOE+OO 1 62E+01 0.00E+OO 3 81E+01 0 OOE+OO 1 31E+01 OOOE+OO 3 48E+01 OOOE+OO 2 90E+01 OOOE+OO 2 07E+01 0 OOE+OO 1 78E+01 0 OOE+OO 2 02E+01 OOOE+OO 1 66E+01 1 20E+02 1 83E+02 6 62E+02 2.96E+01 O.OOE+OO 1 26E+01 0 OOE+OO 5.82E+02 O.OOE+OO 1 67E+01 O.OOE+OO 1 02E+02 O.OOE+OO 3.60E+01 2 Sigma Error MDA O.OOE+OO 1.98E+01 O.OOE+OO 1.38E+01 O.OOE+O O 3 0 2E+01 O.OOE+OO 1.99E+01 OOOE+OO 3 79E+01 0 OOE+OO 3 06E+01 0 OOE+OO 1 78E+01 0 OOE+OO 1 69E+01 0 OOE+OO 2 12E+01 OOOE+OO 2 31E+01 0 OOE+OO 1 87E+02 7 28E+02 2 OOE+02 0 OOE+OO 1 51E+01 OOOE+OO 2 74E+02 0 OOE+OO 1 74E+01 O.OOE+OO 462E+01 O.OOE+OO 3.60E+01 2 Sigma Error MOA 0 OOE+OO 3.16E+01 0 OOE+OO 3.38E+01 0 O OE+OO 7.41E+01 OOOE+OO 3.60E+01 OOOE+OO 6 72E+01 0 OOE+OO 589E+01 OOOE+OO 3 70E+0 1 OOOE+OO 4 33E+01 Append i x E -Page 66 of 93 OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: SEDIMENT_SHORE Concentrat i on (Activity)

pCi/kg Sample Point 091 (INDICATOR*

S@ 2.09 miles J Sample ID: 437635 Sample Dates: 3/20/2017 -3/20/2017 Nuclide Acllvlty Cs-134 <5 14E+01 Cs-137 1.22E+02 Be-7 1.62E+01 K-40 2.48E+04 Co-57 <2.53E+01 Mo-99 <1 31E+03 Ag-110M <3 03E+01 Sb-122 <1 78E+02 Sb-125 <6 95E+01 Sample IO: 452414 Sample Dates: 9/18/2017 -9/18/2017 Nuclide Activity Mn-54 <5 01E+01 Co-58 <3 65E+01 Fe-59 <7 74E+01 Co-60 <3 57E+01 Zn-{;5 <1 04E+02 Zr-95 <9 39E+01 Nb-95 <4 33E+01 1-131 <4.42E+01 Cs-134 <6.93E+01 Cs-137 <4 70E+01 Be-7 <2.43E+02 K-40 2.47E+04 Co-57 <3.59E+01 Mo-99 <6.84E+02 Ag-110M <4 10E+01 Sb-122 <1 84E+02 Sb-125 <9.16E+01 Media Type: SURFACE WATER Concentration (Activity): pCl/1 Sample Point 062 [ CONTROL -ENE@ 0.85 miles J Sample ID: 432256 Sample Dates: 12/5/2016 -1/3/2017 Nuclide Activity Mn-54 <2 04E+OO Co-58 <2 19E+OO Fe-59 <4 32E+OO Co-60 <1 78E+OO Zn-{;5 <4 46E+OO Z r-95 <3.71E+OO Nt>-95 <2 SBE+OO 1-1 31 <116E+01 C s*134 <2 O SE+OO C s-137 <2.0 0E+OO B a L a , 140 <5 99E*OO Be-7 <2.3 4E+01 K-40 2.99E+01 Sample ID: 434501 Sample Dates: 1/3/2017 -1/30/2017 Nuclide Activity Mn-54 <4 03E+OO Co-58 <2 88E+OO Fe-59 <8 34E+OO Co-60 <3 0 1E+OO Zn-{;5 <9 46E+OO Zr-95 <7 91E+OO Nb-95 <5 22E+OO 1-131 <114E+01 C s-134 <3.52E+OO C s , 137 <4.41E+OO BaLa-140 <1.06E+01 Be-7 <3.28E+01 K-40 <7.04E+01 Sample ID: 434748 Sample Dates: 12/5/2016 -2/27/2017 Nuclide Activity H3SW <*1 6E+01 Sample ID: 436756 Sample Dates: 1/30/2017

2/27/2017 Nuclide Activity Mn-54 <3 52E+OO Co-5 8 <2.B3E+OO Report Generated@

3/21/2018 14: 30*38 EnRad Laboratones Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Hu n tersv<< e. North Carolina 28078 2 Sigma Error MDA 0 OOE+OO 5.14 E+0 1 3 75E+01 4.94E+01 1.60E+02 2 79E+02 2 35E+03 5.31E+02 O.OOE+OO 2 53E+01 O.OO E+OO 1 31E+03 O.OOE+OO 3.03E+01 0 OOE+OO 1 78E+02 O.OOE+OO 6.95E+01 2 Sigma Error MDA O.OOE+OO 5.01E+01 OOOE+OO 3.65E+01 0.00E+OO 7 74E+01 OOOE+OO 3.57E+01 O.OOE+OO 1 04E+02 0.00E+OO 9.39E+01 0 OOE+OO 4 33E+01 O.OOE+OO 4 42E+01 0 OOE+OO 693E+01 0 OOE+OO 4 70E+01 OOOE+OO 2 43E+02 2 42E+03 4 42E+02 0 OOE+OO 3 59E+01 0 OOE+OO 684E+02 OOOE+OO 4 10E+01 OOOE+OO 184E+02 O.OOE+OO 9 16E+01 2 Sigma Error MDA O.OOE+OO 2.04E+OO O.OOE+OO 2 19E+OO 0.00E+OO 4.32E+OO O.OOE+OO 1 78 E+OO 0 OO E+OO 4.46E+OO 0 OOE+OO 3 71E+OO 0 OOE+OO 25BE+OO 0 OOE+OO 116E*01 OOOE+OO 2 OSE+OO 0 OOE+OO 2 OOE+OO 0 OOE+OO 5 99E+OO 0 OOE+OO 2 34E+01 2 OBE+01 3 12E+01 2 Sigma Error MDA 0 OOE+OO 4.03E+OO 0 OOE+OO 2 BBE+OO O.OOE+OO 8.34E+OO O.OOE+OO 3.01E+OO O.OOE+OO 9.46E+OO O.OOE+OO 7.91E+OO 0 OOE+OO 5.22E+OO 0 OOE+OO 114E+01 0 OOE+OO 3.52E+OO 0 OOE+OO 4.41E+OO 0 OOE+OO 1 06E+01 0 OOE+OO 3 28E+01 0 OOE+OO 7 04E+01 2 Sigma Error MDA 0 OOE+OO 1 90E+02 2 Sigma Error MDA O.OOE+OO 3.52E+OO O.OOE+OO 2 83E+OO Appendix E

Page 67 of 93 OCONEE Radiological Environmental Monitoring Analysis Report* 2017 (Appendix E) Media Type: SURFACE WATER Concentration (Activity):

pCi/1 Sample Point 062 [ CONTROL -ENE@ 0.85 miles ] Sample ID: 436756 Sample Dates: 1/30/2017 -2/2712017 Nucllde Activity 2 Sigma Error MOA Fe-59 <7.49E+OO O.OOE+OO 7 49E+OO Co-60 <2.73E+OO O.OOE+OO 2 73E+OO Zn-65 <5.03E+OO 0.00E+OO 5 03E+OO Zr-95 <6.07E+OO O.OOE+OO 6.07E+OO Nb-95 <4.26E+OO O.OOE+OO 4.26E+OO 1-131 <1.14E+01 0.00E+OO 1.14E+01 Cs-134 <2.66E+OO OOOE+OO 2 66E+OO Cs-137 <3.4 1 E+OO O.OOE+OO 3.41E+OO Bala-140 <9.96E+OO O.OOE+OO 9.96E+OO Be-7 <2.49E+01 0 OOE+OO 2 49E+01 K-40 <5.05E+01 O.OOE+OO 5.05E+0 1 Sample ID: 439227 Sample Dates: 2/27/2017 -3/27/2017 Nuclide Activity 2 Sigma Error MDA Mn-54 <3.29E+OO 0 OOE+OO 3.29E+OO Co-58 <4.18E+OO 0 O_OE+OO 4.18E+OO Fe-59 <8.67E+OO OOQE+OO 8 67E+OO Co-60 <2.46E+OO OOOE+OO 2.46E+OO Zn-65 <9.25E+OO 0 OOE+OO 9 25E+OO Zr-95 <6.48E+OO OOOE+OO 6 4SE+OO Nb-95 <3.77E+OO 0 OOE+OO 3 77E+OO 1-131 <1.08E+01 0 OOE+OO 1 08E+01 Cs-134 <4.63E+OO 0 OOE+OO 4 63E+OO Cs-137 <4.0SE+OO Q.OOE+OO 4 OSE+OO Bala-140 <1.12E+01 0 OOE+OO 1.12E+01 Be-7 <4.19E+01 0.00E+OO 4 19E+01 K-40 <5.99E+01 O.OOE+OO 5.99E+01 Sample 10: 441902 Sample Dates: 3127 1 2017

4124/2017 Nucllda Activity 2 Sigma Error MDA Mn-54 <3 24E+OO 0 OOE+OO 3.24E+OO Co-58 <2.67E+OO 0 OOE+OO 2 67E+OO Fe-59 <6.07E+OO O.OOE+OO 6.07E+OO Co-60 <2.91E+OO 0 OOE+OO 2.91E+OO Zn-65 <5.94E+OO 0 OOE+OO 5 94E+OO Zr-95 <5.35E+OO 0 OOE+OO 5.35E+OO Nb-95 <3.51E+OO OOOE+OO 3 51E+OO 1-131 <1 14E+01 OOOE+OO 1 14E+01 Cs-134 <3.22E+OO OOOE+OO 3 22E+OO Cs-137 <3.SOE+OO OOOE+OO 3 50E+OO Bala-14 0 <9.38E+OO OOOE+OO 9 38E+OO Be*7 <2 70E+01 OOOE+OO 2 70E+01 K-4 0 7 31E+01 3 23E+01 3 99E+01 Sample 10: 442371 Sample Dates: 212712017.

5122/2017 Nucllda Activity 2 Sigma Error MOA H3SW <-1 7E+01 O.OOE+OO 1 98E+02 Sample ID: <<3898 Sample Dates: 4/2412017 -5122/2017 Nuclide Activity 2 Sigma Error MDA Mn-54 <2 80E+OO . 0.00E+OO 2.80E*OO Co*58 <2 69E+OO O.OOE+OO 2 69E+OO Fe-59 <7 75E+OO 0 OOE+OO 7 75E+OO Co-60 <3.0SE+OO 0 OOE+OO 3.0SE+OO Zn-65 <5.97E+OO 0 OOE+OO 5 97E+OO Zr-95 <6.58E+OO 0 OOE+OO 6 58E+OO Nb-95 <3.51E+OO 0 OOE+OO 3 51E+OO 1-131 <1.09E+01 0 OOE+OO 1 09E+0 1 Cs-134 <3.11E+OO 0 OOE+OO 311E+OO Cs 137 <3.32E+OO 0 OOE+OO 3 32E+OO Bala-1 40 <7.28E+OO 0 OOE+OO 7 28E+OO Be-7 <2.44E+01 O.OOE+OO 2 44E+01 K-40 6.62E+01 3.43E+01 4.54E+01 Sample ID: 446865 Sample Oates: 5122/2017 -6/19/2017 Nuclide Activity 2 Sigma Error MDA Mn-54 <3 09E+OO O.OOE+OO 3.09E+OO Co-58 <3.44E+OO O.OOE+OO 3.44E+OO Fe-59 <5.73E+OO O.OOE+OO S.73E+OO Co-60 <3.11E+OO 0 OOE+OO 3 11E+OO Zn-65 <6.10E+OO 0 OOE+OO 6.10E+OO z,.95 <4.87E+OO 0 OOE+OO 4 87E+OO Nl>-95 <3.73E+OO OOOE+OO 3 73E+OO Report Generated@ 3121/2018 14: 30: 38 c[ffi) EnRad Laboratories Appendix E

Page 68 of 93 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersville , North Carolina 28078 OCONEE.Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: SURFACE WATER Concentration (Activity)

pCt/1 Sample Point 062 ( CONTROL -ENE@ 0.85 miles J Sample ID: 446865 Sample Dales: 5/22/2017

-6/19/2017 Nuclide Activity 2 Sigma Error MDA 1-131 <1 05E+01 O.OOE+OO 1 05E+01 Cs-134 <3.88E+OO 0 OOE+OO 3 88E+OO Cs-137 <2.88E+OO O.OOE+OO 2 86E+OO Bala-140 <7.44E+OO O.OOE+OO 7.44E+OO Be-7 <3.29E+01 OOOE+OO 3 29E+01 K-40 2.77E+01 3.03E+01 4 86E+01 Sample ID: 448933 Sample Dates: 6/19/2017 -7/17/2017 Nuclide Activity 2 Sigma Error MDA Mn-54 <3.0tE+OO 0.00E+OO 301E+OO Co-58 <3 73E+OO O.OOE+OO 3 73E+O O Fe-59 <7 20E+OO O.OOE+OO 7 20E+OO Co-60 <3.35E+OO 0.00E+OO 3 35E+OO Zn-65 <5 87E+OO O.OOE+OO 5 87E+OO Zr-95 <6 93E+OO 0 OOE+OO 693E+OO Nb-95 <3 64E+OO 0.00E+OO 364E+OQ 1-13 1 <116E+01 0 OOE+OO 1.16E+01-Cs-134 <3 73E+OO 0 OOE+OO 3.73E+OO Cs-137 <3 83E+OO O.OOE+OO 3.83E+OO Bala-140 <8 82E+OO O.OOE+OO 8.82E+OO Be-7 <2 81E+01 O.OOE+OO 2.81E+01 K-40 2 26E+01 2 46E+01 3.92E+01 Sample ID: 450057 Sample Dates: 5/22/2017 -8/14/2017 Nuclide Activity 2 Sigma Error MDA H3SW <1 20E+01 0 OOE+OO 2.03E+02 Sample ID: 450766 Sample Dates: 7/17/2017 -8/14/2017 Nuclide Activity 2 Sigma Error MDA Mn-54 <2 68E+OO 0 OOE+O O 2.68E+OO Co-58 <2.32E+OO O.OOE+OO 2 32E+OO Fe-59 <6.07E+OO O.OOE+OO 6.07E+OO Co-60 <2 81E+OO O.OOE+OO 2.81E+OO Zn-65 <5.16E+OO O.OOE+O O 5 16E+OO Zr-95 <4.86E+OO O.OOE+OO 4 66E+OO Nb-95 <4 06E+OO OOOE+O O 4 06E+OO 1-131 <1.01E+01 O.OOE+OO 1 01E+01 Cs-134 <2 60E+OO O.OOE+OO 2 60E+OO Cs-137 <2.49E+OO O.OOE+OO 2 49E+OO Bala-140 <7.03E+OO O.OOE+OO 7 03E+OO Be-7 <2 13E+01 O.OOE+O O 2 13E+01 K-40 6 42E+01 2 78E+01 3 60E+01 Sample ID: 452826 Sample Dates: 8/14/2017 -9/11/2017 Nuclide Activity 2 Sigma Error MDA Mn-54 <3 OSE+OO 0 OOE+OO 3 OSE+OO Co-58 <3 40E+OO OOOE+OO 3.40E+OO Fe-59 <8 38E+OO 0 OOE+OO 8 38E+OO Co-60 <3 27E+OO 0 OOE+O O 3.27E+OO Zn-65 <4 81E+OO 0 OOE+OO 4.81E+OO Zr-95 <6.82E+OO 0 OOE+OO 6.82E*OO Nb-95 <4.20E+OO 0 OOE+OO 4.20E+OO 1-131 <1 14E+01 0 OOE+OO 1.14E+01 Cs-134 <3.39E+OO O.OOE+OO 3 39E+OO Cs-137 <3 77E+OO O.OO E+OO 3 77E+OO Bala-140 <8.60E+OO O.OOE+OO 8 SOE+OO B e-7 <2.62E+01 0.00E+OO 2 6 2E+01 K-40 4 96E+01 3.20E+01 4 S6E+01 Sample ID: 455453 Sample Dates: 9/11/2017 -10/9/2017 Nuclide Activity 2 Sigma Error MDA Mn-54 <3 03E+OO 0 OOE+OO 3 03E+OO Co-58 <2 91E+OO O.OOE+OO 2 91E+OO Fe-59 <6 04E+OO O.OOE+OO 6.04E+OO Co-60 <2 74E+OO OOOE+OO 2.74E+OO Zn-65 <6 40E+OO 0 OOE+OO 6.40E+OO Zr-95 <5 16E+OO 0 OOE+OO 5.16E+OO Nb-95 <2 61E+OO 0 OOE+OO 2 61E+OO 1-131 <1.15E+01 0 OOE+OO 1 , 15E+01 Cs-134 <3.04E+OO 0 OOE+OO 3.04E+OO Cs-137 <2.86E+OO O.OOE+OO 2 86E+OO Bala-140 <5.SOE+OO O.OOE+OO 5.SOE+OO Be-7 <2 50E+01 O.OOE+OO 2.50E+01 Report Generated@ 3/21/2016 14: 30: 36 EnRad Laboratories Appendix E -Page 69 of 93 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersville , North Carolina 28078 OCONEE Radiological Envirdnmental Monitoring Analysis Report -2017 (Appendix E) Media Type: SURFACE WATER Concentration (Activity): pCl/1 Sample Point 062 [ CONTROL

ENE @ 0.85 miles ] Sample 10: 455453 Sample Dates: 9/11/2017
10/9/2017 Sample ID: 462648 Sample Oates: 10/9/2017

-11/6/2017 Sample ID: 462378 Sample Dates: 8/14/2017 -1214/2017 Sample ID: 464746 Sample Oates: 11/6/2017. 1214/2017 Sample 10: 466023 Sample Dates: 12/4/2017 -1/2/2018 Sample Point 063.1 [INDICATOR* E @0.79 miles) Sample 10: 432257 Sample Dates: 1215/2016. 1/3/2017 Report Generated@ 3/21/2018 14: 30.38 Duke Energy Annual Report

Appendix E c@ Nuclide K-40 Nuclide Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr-95 Nb-95 1-131 Cs-1 34 Cs-137 Bala-140 Be-7 K-40 Nuclide H3SW Nuclide Mn-54 Co-58 Fe-59 Co-60 Zn-65 Z r-95 Nl>-95 l-131 Cs-134 Cs-137 Bala-140 Be-7 K-40 Nuclide Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr-95 Nb-95 1-131 Cs-134 Cs-137 Bala-140 Be-7 K-40 H3SW Nuclide Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr-95 Nb*95 1-131 Cs-134 Cs-137 Bala-140 Be-7 K-40 EnRad Laboratories 13339 Hagers Ferry Road Huntersville. North Carolina 28078 Activity <4 59E+01 Activity <2 71E+OO <3.01E+OO <7 72E+OO <3.64E+OO <7.67E+OO <6.46E+OO

<5.02E+OO <1 14E+01 <3.82E+OO <3.90E+OO <1.08E+01 <3.52E+01 <7 16E+01 Activity <-56E+01 Activity <3 19E+OO <3 OOE+OO <6 09E+OO <4 08E+OO <7 10E+OO <7 34E+OO <3.79E+OO <110E+01 <3.85E+OO <3.73E+OO <1.07E+01 <3.35E+01 1.09E+01 Activity <1 77E+OO <1 93E+OO <4.0SE+OO <1 70E+OO <3.73E+OO <4 07E+OO <2 66E+OO <1 03E+01 <2 16E+OO <1 95E+OO <467E+OO <1 73E+01 4 95E+01 * <6 56E+01 Activity <2 83E+OO <2 27E+OO <4 78E+OO <1 8 1E+OO <5.46E+OO <5 33E+OO <3 35E+OO <116E+01 <3 18E+OO <2 71E+OO <6.~E+OO <2 69E+01 6.83E+01 2 Sigma Error MDA 0 OOE+OO 4.59E+01 2 Sigma Error MOA 0 OOE+OO 2 71E+OO OOOE+OO 301E+OO OOOE+OO 7 72E+OO OOOE+OO 364E+OO OOOE+OO 7 67E+OO OOOE+OO 646E+OO OOOE+OO 502E+OO 0 OOE+OO 1 14E+01 OOOE+OO 3 82E+OO OOOE+OO 3 90E+OO 0 OOE+OO 1 08E+01 0 OOE+OO 3.52E+01 0 OOE+OO 7 16E+01 2 Sigma Error MDA O.OOE+OO 1 90E+02 2 Sigma Error MDA O.OOE+OO 319E+OO O.OOE+OO 3.00E+OO O.OOE+OO 6 09E+OO 0.00E+OO 4 08E+OO 0 OOE+OO 7.10E+OO O.OOE+OO 7 34E+OO 0 OOE+OO 3 79E+OO 0 OOE+OO 110E+01 0 OOE+OO 3 85E+OO OOOE+OO 3 73E+OO 0 OOE+OO 1 07E+01 0 OOE+OO 3 35E+01 2 67E+01 4 72E+01 2 Sigma Error MDA O.OOE+OO 1 77E+OO O.OOE+OO 1 93E+OO 0.00E+OO 4.05E+OO O.OOE+O O 1 70E+OO O.OOE+O O 3 73E+O O O.OOE+OO 4.07E+OO 0 OOE+OO 2.66E+OO O.OOE+OO 1 03E+01 0 OOE+OO 2 16E+OO 0 OOE+OO 1 95E+OO 0 OOE+OO 4 67E+OO OOOE+OO 1 73E+01 1 65E+01 1 76E+01 0 OOE+OO 1 67E+02 2 Sigma Error MOA O.OOE+OO 2.83E+OO 0 OOE+OO 2.27E+OO O.OOE+OO 4.78E+OO O.OOE+OO 1.81E+OO O , OOE+OO 5.46E+OO O.OOE+OO 5 33E+OO OOOE+OO 3.35E+O O O.OOE+OO 1 16E+01 0 OOE+OO 3 18E+OO 0 OOE+OO 2 71E+OO 0 OOE+OO 6.44E+OO 0 OOE+OO 2 69E+01 3 03E+01 4 01E+0 1 Appendix E

Page 70 of 93 OCONEE Radiological Envirohmental Monitoring Analysis Report -2017 (Appendix E) Media Type: SURFACE WATER Concentration (Activity):

pCln Sample Point 063.1 [INDICATOR* E@ 0.79 miles) Sample ID: 434502 Sample Dates: 1/3/2017

1/3012017 Nuclide Activity 2 Sigma Error MOA Mn-54 <3.66E+OO O.OOE+O O 3.66E+OO Co-5 8 <4.43E+OO 0 OOE+OO 4.43E+OO Fe-59 <7.96E+OO 0 OOE+OO 7.96E+OO Co-60 <3.92E+OO O.OOE+OO 3.92E+OO Zn-65 <8.45E+OO O.OOE+OO 8.45E+OO Zr-95 <7 20E+OO O.OOE+OO 7.20E+OO Nb-95 <3.54E+OO O.OOE+OO 3.54E+OO 1-131 <1 09E+01 O.OOE+OO 1 09E+01 Cs-134 <3 56E+OO O.OOE+OO 3.S6E+OO Cs-137 <3.82E+OO O.OOE+OO 3 82E+OO Bala-140 <9.21E+OO O.OOE+OO 9 21E+D0 Be-7 <366E+01 OOOE+OO 3 66E+01 K-40 <6 06E+01 0 OOE+OO 6 06E+01 Sample JD: 434749 Sample Oates: 12/512016

-212712017 Nuclide Activity 2 Sigma Error MDA H3SW 2 56E+03 1 69E+02 1 90E+02 Sample ID: 436757 Sample Oates: 1 1 30/2017

2/27/2017 Nuclide Activity 2 Sigma Error MDA Mn-54 <3 77E+OO 0 OOE+OO 3.77E+OO Co-58 <4 37E+OO OOOE+OO 4.37E+OO Fe-59 <6.51E+OO O.OOE+OO 6.51E+OO Co-60 <3.66E+OO 0 OOE+OO 3.66E+OO Zn-65 <7 04E+OO 0 OOE+OO 7.04E+OO Zr-95 <6.69E+OO O.OOE+OO 6.69E+OO Nb-95 <3 96E+OO O.OOE+OO 3.96E+OO 1-131 <1 12E+01 O.OOE+OO 112E+01 Cs-134 <3.96E+OO O.OOE+OO 3.98E+OO Cs-137 <319E+OO O.OOE+OO 3 19E+OO Bala-140 <6 55E+OO O.OOE+OO 655E+OO Be-7 <2 57E+01 O.OOE+OO 2 57E+01 K-40 2 81E+01 3 10E+01 4 96E+0 1 Sample ID: 439228 Sample Dates: 2 1 27/2017 -3127/2017 Nuclide Activity 2 Sigma Error MDA Mn-54 <2 76E+OO OOOE+OO 2 76E+OO Co-58 <3 40E+OO 0 OOE+OO 3.40E+OO Fe-59 <4 17E+OO 0 OOE+OO 4 HE+OO Co~ <2 27E+OO OOOE+OO 2.27E+OO Zn-65 <6.14E+OO OOOE+OO 6.14E+OO Zr-95 <5.9 1E+OO O.OOE+OO 5.91E+OO Nb-95 <3.69E+OO O.OOE+OO 3.69E+OO 1-131 <1 15E+01 0 OOE+OO 115E+01 Cs-134 <2 91E+OO O.OOE+OO 2.91E+OO Cs-137 <2.73E+OO O.OOE+OO 2 73E+OO Bala-140 <7 12E+OO O.OOE+OO 7 12E+OO Be-7 <2 80E+01 O.OOE+OO 2 80E+01 K-40 3 82E+01 2.20E+01 2 94E+01 Sample ID: 441903 Sample Dates: 3127/2017
4/2412017 Nucllde Activity 2 Sigma Error MDA Mn-54 <4 34E+OO O.OOE+OO 4 34E+OO Co-58 <4 21E+OO 0 OOE+OO 4 21E+OO Fe-59 <7 61E+OO 0 OOE+OO 7 61E+OO Co-60 <2 98E+OO 0 OOE+OO 2 98E+OO Zn-65 <1 07E+0 1 O.OOE+OO 1.07E+01 Zr-95 <1 11E+01 O.OOE+OO 1 11E+01 Nb-95 <6.35E+OO O.OOE+OO 6.35E+OO 1-131 <1.17E+01 O.OOE+OO 1.17E+01 Cs-134 <3.74E+OO O.OOE+OO 3.74E+OO Cs-137 <4.36E+OO 0.00E+OO 4.3SE+OO Bala-140 <9.55E+OO O.OOE+OO 9.SSE+OO Be-7 <3.52E+01 O.OOE+OO 3.52E+01 K-40 3.72E+01 2.48E+01 2 76E+01 Sample ID: 442372 Sample Dates: 2127/2017

-5/22/2017 Nuclide Activity 2 Sigma Error MOA H3SW 3.24E+03 1 9SE+02 1 97E+02 Sample ID: 443899 Sample Oates: 412412017

5/22/2017 Nuclide Activity 2 Sigma Error MDA Mn-54 <3.03E+OO 0 OOE+OO 3.03E+OO Co-58 <3.49E+OO D OOE+OO 3.49E+OO Fe-59 <7.56E+OO 0 OOE+OO 7.58E+OO Report Generated@

3/21/2018 14 30: 38 EnRad Laborato es Appendix E -Page 71 of 93 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersville North Carolina 28078 OCONEE Radiological Environmental Monitoring Analysis Report. 2017 (Appendix E) Media Type: SURFACE WATER Concentration (Activity)

pCl/1 Sample Point 063.1 [INDICATOR*

E@0.79 miles] Sample ID: 443899 Sample Dates: 4/24/2017. 5/22/2017 Sample ID: 446866 Sample Dates: 6/1 9/2017 -6119/2017 Sample 10: 448934 Sample Dates: 6/19/2017

7 1 17/2017 Sample ID: 450058 Sample Dates: 6/19/2017
8/14/2017 Sample ID: 450767 Sample Dates: 7/17/2017
8/14/2017 Sample ID: 452827 Sample Dates: 8/14/2017.

9/11/2017 Report Genera1ed@ 3/21/2018 14:3 0: 38 Duke Energy Annual Report -Append ix E Nuclide Co-00 Zn-65 Zr-95 Nb-95 1-131 Cs-134 Cs-137 Bala-140 Be-7 K-40 Nuclide Mn-54 Co-58 Fe-59 Co-6 0 Zn-65 Zr-95 Nb-95 1-131 Cs-134 Cs-137 Bala-140 Be-7 K-40 Nuclide Mn-54 Co-58 F e-59 Co-60 Zn-65 Zr-95 Nb-95 1-131 Cs-134 Cs-137 Bala-140 Be-7 K-40 Nuclide H3SW Nuclide Mn-54 Co-58 Fe-59 Co-00 Zn-65 Zr-95 Nb-95 1-131 Cs-134 Cs-137 Ba la-140 Be-7 K-40 Nuclide Mn-54 Co-58 Fe-59 Co.SO Zn-65 Zr-95 Nb-95 1-13 1 EnRad Laboratories 13339 Hagers Fe r ry Road Huntersville , North Caro lin a 28078 Activity <2.88E+OO <5.90E+OO <5 75E+OO <4 19E+OO <1 15E+01 <316E+OO <2 76E+OO <6.65E+OO <2.84E+01 7 06E+01 Activity <3 22E+OO '<3.47E+OO <6.50E+OO <3 65E+OO <8 49E+OO <4 63E+OO <3.61E+OO <4.95E+OO <3.64E+OO <3.66E+OO <5.37E+OO <1 98E+01 3.69E+01 Activity <3.44E+OO <3.67E+OO <9.44E+OO <4.42E+OO <7.42E+OO <8.38E+OO <-'l.90E+OO <1.20E+01 <4.60E+OO <3 57E+OO <111E+01 <3.32E+01 6 27E+01 Activity 3.41E+03 Activity <2.4 3E+OO <2.70E+OO <5.29E+OO <2.87E+OO <7.07E+OO <5.26E+OO <3.85E+OO <1.20E+01 <2.83E+OO <2.23E+OO <612E+OO <311E+01 1 26E+01 Activity <2 20E+OO <1.56E+OO <6.7BE+OO <2.34E+OO <5.61E+OO <4.34E+OO <3.58E+OO <1.03E+01 2 Sigma Error MDA 0 OO E+OO 2 88E+OO OOOE+OO 590E+OO OOOE+OO 5 75E+OO 0 OOE-+00 4 19E+OO OOOE+OO 115E+01 OOOE+OO 3 16E+OO 0 OOE-+00 2 76E+OO 0 OOE-+00 8 65E+OO 0 OOE-+00 2 64E+01 362E+01 5 16E+01 2 Sigma Error MDA O.OOE+OO 3 22E+OO O.OOE+OO 3 47E+OO O.OOE+OO 6 50E+OO O.OOE+OO 3 65E+OO O.OOE+OO 8.49E+OO O.OOE+OO 4 63E+OO O.OOE+OO 3.61E+OO O.OOE+OO 4.9SE+OO OOOE+OO 364E+OO 0 OOE+OO 3.66E+OO 0 OOE+OO 5.37E+OO 0 OOE+OO 1 98E+01 3.08E+01 4.39E+01 2 Sigma Error MDA 0 OOE+OO 3.44E+OO OOOE+OO 3 67E+OO 0 OOE+OO 9.44E+OO 0 OOE+OO 4 42E+OO O OOE+OO 7 42E+OO 0 OOE+OO 8 38E+OO 0 OOE+OO 4 90E+OO O.OOE+OO 1 20E+01 O.OOE+OO 4 60E+OO 0 OOE+OO 3 57E+OO 0.00E+OO 111E+01 O.OOE+OO 3 32E+01 3 76E+01 4 51E+01 2 Sigma Error MOA 2 02E+02 2 05E+02 2 Sigma Error MDA 0 OOE+OO 2.43E+OO 0 OOE+OO 2 70E+OO 0 OOE+OO 5.29E+OO O.OOE+OO 2.87E+OO OOOE+OO 7 07E+OO 0 OOE+OO 5.26 E+OO 0 OOE+OO 3 85E+OO OOOE+OO 1 20E+01 0 OOE+OO 2 8 3E+O O O OOE-+00 2 23E+OO 0 OOE-+00 6 12E+OO 0 OOE+OO 3 1 1E+01 2.11E+01 3 60E+01 2 Sigma Error MDA O.OOE+OO 2.20E+OO O.OOE+OO 1 56E+OO O.OOE+OO 6.78E+OO O.OOE+OO 2 34E+OO 0 OOE+OO 5.61E+OO 0 OOE+OO 4.34E+OO 0 OOE+OO 3 58E+OO 0 OOE+OO 1 03E+01 Appendix E

Page 72 of 93 OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: SURFACE WATER Concentration (Activity):

pCin Sample Point 063.1 [ INDICATOR -E @ 0. 79 miles] Sample ID: 452827 Sample Oates: 8/14/2017 -9/11/2017 Nuclide Activity 2 Sigma Error MDA Cs-134 <2 76E+OO OOOE+OO 2 76E+OO Cs-137 <2 77E+OO O.OOE+OO 2 77E+O O Bala-140 <7 26E+OO 0 OOE+OO 7 26E+OO Be-7 <2 41E+01 0 OOE+OO 2 41E+0 1 K-40 5 52E+01 2.49E+01 3 09E-+-0 1 Sample ID: 455454 Sample Datea: 9/11/2017 -10/912017 Nuclide Activity 2 Sigma Error MOA Mn-54 <4 36E+OO 0 OOE+OO 4 36E+OO Co-56 <4 26E+OO 0 OOE+OO 4 26E+OO Fe-59 <7 76E+OO OOOE+OO 7 78E+OO Co-60 <2 37E+OO OOOE+OO 2 37E+OO Zn-65 <6 92E+OO 0 OOE+OO 8 92E+OO Zr-95 <6.75E+OO 0 OOE+OO 6 75E+OO Nb-95 <S.S6E+OO 0 OOE+OO S 56E+OO 1-131 <1 01E+!)1 0 OOE+OO 1 01E+0 1 Cs-134 <4.83E+OO 0 OOE+OO 4 63E+O O Cs-137 <4.04E+OO 0 OOE+OO 4.04E+OO Bala-140 <115E+01 0 OOE+OO 1.15E+0 1 Be-7 <3.83E+01 O.OOE+OO 3 63E+01 K-40 3 70E+01 2.72E+01 3.50E+Q1 Sample ID: 462649 Sample Dates: 10/9/2017

1116/2017 Nuclide Activity 2 Stgma Error MDA Mn-54 <4 41E+OO O.OOE+OO 4.41E+OO Co-58 <4 24E+OO O.OOE+OO 4.24E+OO Fe-59 <6 67E+OO O.OOE+OO 6.67E+OO Co-60 <3 83E+OO 0.00E+OO 3.63E+OO Zn-65 <6 09E+OO O.OOE+OO 8 09E+OO Zr-95 <5 66E+OO O.OOE+OO 5.66E+OO , Nb-95 <3 58E+OO 0 OOE+OO 3 SBE+OO 1-131 <116E+01 0.00E+OO 116E+01 Cs-134 <4 41E+OO 0.00E+OO 4 41E+OO Cs-137 <3 71E+OO 0 OOE+OO 3 71E+OO Bala-140 <8.67E+OO 0 OOE+OO 8 67E+OO Be-7 7.83E+OO 2 23E+01 3 94E+01 K-40 7 53E+01 3 31E+01 3 06E+01 Sample ID: 462379 Sample Dates: 8114/2017

-1214/2017 Nuclide Activity 2 Sigma Error MDA H3SW 1.09E+04 3 05E+02 1 89E+0 2 Sample ID: 464746 Sample Oates: 11/6/2017 -1214/2017 Nuclide Activity 2 Sigma Error MOA Mn-54 <3.12E+OO OOOE+OO 3 12E+OO Co-58 <2 99E+OO 0 OOE+OO 2.99E+OO Fe-59 <6.46E+OO 0 OOE+OO 6.46E+OO Co-60 <2 75E+OO 0 OOE+OO 2.75E+OO Zn-65 <5 81E+OO O.OOE+OO 5.61E+OO Zr-95 <5 74E+OO Q.OOE+OO 5 74E+OO Nb-95 <3 35E+OO 0.00E+OO 3.35E+OO 1-131 <1 08E+01 0 OOE+OO 1.08E+01 Cs-134 <3 53E+OO O.OOE+OO 3*53E+OO Cs-137 <3.20E+OO O.OOE+OO 3.20E+OO Bala-140 <5 76E+OO 0 OOE+OO 5 76E+OO Be-7 <2.81E+01 O.OOE+OO 2 81E+01 K-40 2 67E+01 2.74E+01 4 37E+01 Sample ID: 466024 Sample Oates: 1214/2017 -1/212018 Nuclide Activity 2 Sigma Error MDA Mn-54 <2 24E+OO OOOE+OO 2 24E+OO Co-58 <3.21E+OO OOOE+OO 3 21E+OO Fe-59 <5.45E+OO OOOE+OO 5 4SE+OO Co-60 <2.44E+OO 0 OOE+OO 2 44E+OO Zn-65 <4 87E+OO 0 OOE+OO 4.87E+OO Zr-95 <4 20E+OO O.OOE+OO 4.20E+OO Nb-95 <319E+OO 0 OOE+OO 319E+OO 1-131 <111E+01 O.OOE+OO 111E+01 Cs-134 <2 99E+OO 0 OOE+OO 2.99E+OO Cs-137 <2 79E+OO O.OOE+OO 2 79E+OO 6ala-140 <6 99E+OO O.OOE+OO 6.99E+OO Be-7 <2 75E+01 0 OOE+OO 2 75E+0 1 K-40 3 18E+01 2 17E+01 3 18E+01 Report Generated@ 3/21/2018 14: 30: 38 c@ EnRad Laborator i es Appendix E -Page 73 of 93 Duke Energy Annual Report

Appendix E 13339 Hagers Ferry Road Huntersville.

North Carolina 28078 OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: SURFACE WATER Concentration (Activity)

pCi/1 Sample Point 063.1 [INDICATOR

E@ 0.79 miles] Sample ID: 466024 Sample Dates: 12/412017

-1/2/2018 Nuclide H3SW Media Type: TLD Concentration (Activity)

mR/Standard Quarter Sample Point 020 [INDICATOR*

N@ 0.16 miles] Sample ID: 437250 Sample Dates: 12/1312016

3/14/2017 Sample ID: 445148 Sample Dates: 3/14/2017
6/13/2017 Sample ID: 452179 Sample Dates: 6/13 1 2017
9/13/2017 Sample ID: 464561 Sample Dates: 9/13/2017
12/1212017 Sample Point 021 [ INDICATOR
NNE @ 0.25 miles] Sample ID: 437251 Sample Dates: 12/13/2016

-3114/2017 Sample ID: 445149 Sample Dates: 3/1412017 -6/13/2017 Sample ID: 452180 Sample Dates: 6/1312017

9/13/2017 Sample ID: 464562 Sample Dates: 9/13/2017. 12/12/2017 Sample Point 022 [INDICATOR
NE@ 0.53 miles J Sample ID: 437252 Sample Dates: 12/13/2016

-3/1412017 Sample ID: 445150 Sample Dates: 3/14/2017 -8/13/2017 Sample ID: 452181 Sample Datea: 6/13/2017 -9/13/2017 Sample ID: 464563 Sample Dates: 9/13/2017

12/12/2017 Sample Point 023 (INDICATOR*

ENE @ 0.93 miles) Sample ID: 437253 Sample Dates: 12/13/2016

3/1412017 Sample ID: 445151 Sample Dates: 3114/2017

-6/13/2017 Sample ID: 452182 Sample Dates: 6/13/2017. 9/1312017 Sample ID: 484564 Sample Dates: 9/13/2017 -12/12/2017 Sample Point 024 [INDICATOR* E@ 0.81 miles] Sample ID: 437254 Sample Dates: 12/13/2016 -3/1412017 Sample ID: 445152 Sample Dates: 311412017 -6/13/2017 Sample ID: 452183 Sample Dates: 6/13/2017 -9/13/2017 Sample ID: 464565 Sample Dates: 911312017 -12/12/2017 Report Generated@ 3/21/201814

30: 38 Duke Ene r gy Annual Report

Appendix E Nuclide mR/Std Otr Nuclide mR/StdQt r Nuclide mRIStd Otr Nuclide mR/S t d Otr Nuclide mR/Std Qtr Nuclide mRIStd Otr Nuclide mR/Std Qtr Nuclide mR/Std Qtr Nuclide mR/StdQtr Nuclide mR/StdQtr Nuclide m R/Std Qtr Nuclide mR/Std Qtr Nucllde mR/StdOI<

Nuclide mR/Std Ol r Nuclide mR/Std Q t r Nuclide m R/SldOlr Nuclide mR/Std Qtr Nuclide mR/SldQtr Nuclide mR/SldQlr Nuclide mR/Std Otr EnRad Laboratories 13339 Hagers Ferry Road Huntersvi le , North Carol i na 28078 Activity 7 69 E+03 Activity 2 1 70 Activity 18 3 1 Activity 1 3 4 2 Activity 18 94 Activity 17.04 Activity 1 3.43 Activity 8.9 9 Activity 14 17 Activity 2 6 2 3 A c tivity 22 1 8 Activity 1 8 06 Activity 23.38 Activity 26.62 Activity 20 34 Act i vity 1643 Activity 22 04 Activity 34.65 Activity 26.86 Activity 24 95 Activity 30 14 2 Sigma Error MDA 2 60E+0 2 1.68E+02 TLD R I NG TLO_INNER TLD RING TLD_INNER TLD RING TLD_INNER TLD RING TLD_INNER TLD RING TLD_INNER Appendix E. Page 74 of 93 OCONEE Radiological Environmental Monitoring Analysis *Report* 2017 (Appendix E) Media Type: TLD Concentration (Activity)

mR/Standard Quarter Sample Point 025 [INDICATOR

ESE@ 0.42 miles] Sample ID: 437255 Sample Dates: 12/13/2016

-3/14/2017 Sample ID: 445153 Sample Dates: 3/1412017

6/1312017 Sample ID: 452184 Sample Oates: 6113/2017

-9/13/2017 Sample ID: 464568 Sample Dates: 9/1312017 -12/12/2017 Sample Point 026 [INDICATOR* SE@ 0.34 mile s J Sample ID: 437256 Sample Oates: 12/13/2016 -3/14/2017 Sample ID: 445154 Sample Dates: 31*1412017

6113/2017 Sample 10: 452185 Sample Date,: 6113/2017 -9113/2017 Sample ID: 464567 Sample Oates: 911312017

-12/12/2017 Sample Point 027 [INDICATOR* SSE@ 0.49 miles] Sample ID: 437257 Sample Oates: 12/13/2016 -3/14/2017 Sample ID: 445155 Sample Dates: 3114/2017 -6/13/2017 Sample 10: 452 1 86 Sample Oates: 6/1312017. 9/1312017 Sample 10: 464568 Sample Dates: 9/1312017 -12/12/2017 Sample Point 028 [ INDICATOR

S @ 0.46 miles ] Sample 10: 437258 Sample Oates: 12/13/2016

-3114/2017 Sample ID: 445156 Sample Oates: 3/14/2017 -611312017 Sample ID: 462187 Sample Dates: 6/13/2017 -9/13/2017 Sample 10: 464569 Sam pie Dates: 9/13/2017 -12/12/2017 Sample Point 029 [ INDICATOR

SSW@ 0.56 miles] Sample ID: 437259 Sample Dates: 12/1312016
3/14/2017 Sample 10: 445157 Sample Oates: 3114/2017 -6/1312017 Sample 10: 452188 Sample Dates: 6/13/2017

-9/13/2017 Sample ID: 464570 Sample Oates: 9/13/2017 -12112/2017 Sample Point 030 [INDICATOR* SW@ 0.42 miles] Sample ID: 437260 Sample DatH: 12/13/2016 -3/14/2017 Sample 10: 445158 Sample Dates: 311412017. 8/13/2017 Report Generaled@ 3/2 1 12018 14: 30: 38 Duke Energy Annual Report -Appendix E c@ Nuclide mR/Std Otr Nuclide mR/S t d Otr Nuclide mR/StdOtr Nuclide mR/StdQ t r Nuclide mR/Std Ot r Nuclide mR/Std Qt r Nuclide mR/Std Otr Nuclide mR/S t d Qtr Nuclide mR/SldO tr Nuclide m R/StdOtr Nuclide mR/S t dOt r Nuclide mR/StdOtr Nuclide mR/Std Qtr Nuclide mRIStdOt r Nuclide mRIStd Otr Nuclide m R/Std Ot r Nuclide m R/StdOtr Nuclide mR/StdOtr Nuclide mR/StdQtr Nuclide m R/StdOtr Nuclide mR/StdO t r Nuclide mR/Std Qtr EnRad Laboratories 13339 Hagers Ferry Road Huntersville, North Carolina 28078 Activity 21.79 Activity 17.22 Activity 1 2.2 9 Activity 19.3 7 Activity 20.00 Activity 16.61 Activity 1 2 34 Actlvlty 18.05 Act i vity 2 2.31 Activity 18.53 Activity 13.37 Activity 1 9.4 1 Activity 18 76 Activ i ty 15.1 2 Activity 11.21 Activity 17 22 Activity 1 8 29 Activity 14 35 Activity 10 49 Act i vity 16.05 Activity 20.45 Activ i ty 1804 TLO RING TLO_INNER TLO RING TLO_INNER TLO RING TLO_INNER TLO RING TLO_INNER TLO RING TLO_INNER. TLO RING TLO_INNER Appendix E

Page 75 of 9'.

OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type; TLD Concentration (Activity); mR/Standard Quarter Sample Point 030 [INDICATOR* SW@ 0.42 miles J Sample ID: 452189 Sample Oates: 6/13/2017 -9/13/2017 Sample ID: <164571 Sample Dates: 9/13/2017 -12/12/2017 Sample Point 031 (INDICATOR-WSW@ 0.27 miles] Sample ID: 437261 Sample Dates: 12/13/2016 -3/14/2017 Sample ID: 445159 Sample Dates: 3/14/2017 -6/13/2017 Sample ID: 452190 Sample Dates: 6/13/2017 -9/1 3/2017 Sample ID: 464572 Sample Dates: 9/13/2017 -12/12/2017 Sample Point 032 [INDICATOR* WNW @0.19 miles] Sample ID: 437262 Sample Oates: 12/13/2016 -3/14/2017 Sample 10: 445160 Sample Dates: 3/14/2017 -6/13/2017 Sample 10: 452191 Sample Dates: 6/13/2017. 9/13/2017 Sample ID: 464573 Sample Oates: 9/13/2017 -12/12/2017 Sample Point 033 ( INDICATOR -WNW @ 0.21 miles ] Sample 10: 437263 Sample Dates: 12/13/2016 -3/1412017 Sample ID: 445161 Sample Dates: 3/14/2017 -6/1 312017 Sample ID: 452192 Sample Dales: 6/13/2017 -9/13/2017 Sample ID: 464574 Sample Dates: 9/13/2017 -12/12/2017 Sample Point 034 [ INDICATOR

NW@ 0.22 miles] Sample 10: 437264 Sample Oates: 12/13/2016

-3/14/2017 Sampla 10: 445162 Sample Oates: 3/14/2017 -6/13/2017 Sample 10: 452193 Sample Dates: 6/13/2017 -9/13/2017 Sample ID: 464575 Sample Dates: 9/13/2017 -12/12/2017 Sample Point 035 ( INDICATOR

NNW @ 0.17 miles ] Sample ID: 437265 Sample Dates: 12/13/2016

-3/1412017 Sample ID; 445163 Sample Oates: 3/1412017 -6/13/2017 Sample 10: 452194 Sam pie Dates: 6/13/2017 -9/13/2017 SamptelO: 464576 Sample Dates: 9/13/2017 -12/12/2017 Report Generated@ 3/21/2018 14: 30: 38 Duke Energy Annual Report -Appendix E Nuclide mR/StdO tr Nuclide mR/Std Otr Nuclide mR/StdOtr Nuclide mR/Std Qtr Nuclide mR/Std Ot r Nuclide mR/Std Otr Nuclide mR/Sld 01r Nucllda mR/SldOtr Nuclide mR/StdQtr Nucllde mR/Std Otr Nuclide mR/Std Otr Nuclide mR/StdOlr Nuclid e mR/Std Olr Nuclide mR/Std Ol r Nuclide mR/S td Qtr Nuclide mFVStd Otr Nuclide mR/S td Ot r Nuclide mR/Std Qtr Nuclide mR/Std Otr Nuclide mR/Std Otr Nuclide mR/Std Otr Nuclide mR/Std Otr EnRad laboralones 13339 Hagers Ferry R o ad Huntersville. North Ca rol i na 2 8078 Activity 13 57 Activity 20 72 Activity 1669 Activity 15 90 Activity 12.09 Activity 16.78 Activity 2314 Activity 1867 Activity 14.54 Activity 18.02 Activity 2067 Activity 1619 Activity 1199 Activity 17 22 Activity 20.29 Act i vity 16.66 Activity 13 34 Activity 17 46 Activity 27 70 Activity 22 76 Activ i ty 17 37 Activ i ty 22 64 TLD RING TLO_INNER TLD RING TLD_INNER TLD RING TLD INNER TLO RING TLO_INNER TLD RING TLD_INNER TLD RING TLD_INNER Appendix E -Page 76 of 93 OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: TLD Concentration (Activity)

mR/Standard Quarter Sample Polnt036 [ INDICATOR -N @4.18 miles J Sample ID: 437266 Sample Oates: 12/13/2016

-3/14/2017 Sample 10: 445164 Sample Dates: 3/14/2017 -6/13/2017 Sample ID: 452195 Sample Oates: 6/13/2017 -9/13/2017 Sample to: 464577 Sample Oates: 9/13/2017 -12/12/2017 Sample Point 037 [ INDICATOR -NNE @4.85 miles] Sample ID: 437267 Sample Dates: 12/13/2016 -3/1412017 Sample ID: 445165 Sample Oates: 3/14/2017 -6/1312017 Sample ID: 452196 Sampla Oates: 6/13/2017 -9/13/2017 Sample ID: 464578 Sample Dates: 9/13/2017 -12/1212017 Sample Point 038 [ INDICATOR -NE @4.24 miles] Sample ID: 437268 Sample Oates: 12/13/2016 -3/14/2017 Sample ID: 445166 Sample Dates: 3/14/2017 -6/1312017 Sample ID: 452197 Sample Dates: 6/13/2017 -9/13/2017 Sample ID: 464579 Sample Oates: 9/13/2017 -12/1212017 Sample Point 039 [ INDICATOR -ENE@ 4.02 miles J Sample ID: 437269 Sample Dates: 12/1312016 -3/14/2017 Sample ID: 445167 Sample Oates: 3/14/2017 -6/13/2017 Sample ID: 452198 Sample Dates: 6/13/2017 -9/13/2017 Sample 10: 464580 Sample Oates: 9/13/2017 -12/12/2017 Sample Point 040 [ INDICATOR -E@ 4.74 miles] Sample ID: 437270 Sample Dates: 12113/2016 -3/14/2017 Sample I D: 445168 Sample Dates: 3/14/2017 -6/13/2017 Sample I D: 452199 Sample Oates: 8113/2017 -9/13/2017 Sample 10: 464581 Sample Oates: 9/13/2017 -12112/2017 Sample Point 041 ( INDICATOR -ESE @4.25 miles] Sample ID: 437271 Sample Dates: 12/13/2016 -3/14/2017 Sample ID: 445169 Sample Dates: 3/14/2017 -6/13/2017 Report Generated@ 3/21/2018 14: 30: 38 Duke Energy Annual Report -Appendix E EnRad Laborator i es Nuclide mR/Sld Qlr Nuclide mR/StdOt, Nuclide mR/Sld Qtr Nuclide mR/S td Qlr Nuclide m RIStdQlr Nuclide mR/StdQl r Nuclide m R/S t dQt r Nuclide mRIStdOtr Nuclide mR/StdOt r Nuclide mR/Std Qtr Nuclide m R/S tdQtr Nuclide mR/StdOtr Nuclide m RIStd Qtr Nuclide m RISldQlr Nuclide mR/Sld Ql r Nuclide mRISld Qtr Nuclide mR/Std Qlr Nuclide mR/StdQtr Nuclide mR/SldOtr Nuclide mR/StdQtr Nuclide mR/Std Otr Nuclide mR/Std Qtr

13339 Hage rs Ferry Road Huntersville. North Caro li na 28078 t Activity 30.8 4 Activity 2355 Activity 2 1 75 Activity 2 7 55 Activity 24 76 Activity 2 1.2 7 Activity 12 9 4 Act i vity 18.45 Activ i ty 2 6 21 Activity 2 1 76 Activity 17 04 Activity 22 9 Activity 2 8.89 Activity 2 391 Activity 18 04 Activity 23.5 2 Activity 31.30 Activity 25.16 Activ i ty 2049 Activity 25 51 Activity 20.38 Activity 16.80 TLO RING TLO_OUTER TLD RING TLD_OUTER TLO RING TLO_OUTER TLO RING TLD_OUTER TLD RING TLO_OUTER TLO RING TLD_OUTER Appendix E -Page 77 of 93 OCONEE Radiological Environmental Monitoring Analysis Report
2017 (Appendix E) Media Type: TLO Concentration (Activity)

mR/Standard Quarter Sample Point 041 [INDICATOR*

ESE@ 4.25 miles] Sample ID: 452200 Sample Dates: 6/13/2017 -9/13/2017 Sample ID: 464582 Sample Dates: 9/13/2017

12/12/2017 Sample Point 042 ( INDICATOR
SE@ 4.93 miles] Sample ID: 437272 Sample Oates: 12/13/2016.

3/14/2017 Sample ID: 445170 Sample Dates: 3/14/2017 -6/13/2017 Sample ID: 452201 Sample Dates: 6/13/2017

911312017 Sample ID: 464583 Sampl e Dates: 911312017
12/12/2017 Sample Point 043 (INDICATOR.

SSE@ 4.09 miles] Sample ID: 437273 Sample Dates: 12/1312016 -3/1412017 Sample ID: 445171 Sample Dates: 3114/2017

6/13/2017 Sample ID: 452202 Sample Dates: 6/1312017
9/13/2017 Sample ID: 464584 Sample Dates: 9/13/2017 -12/12/2017 Sample Point 044 (INDICATOR
S@ 3.96 mlles] Sample ID: 437274 Sample Oates: 12/13/2016. 3/14/2017 Sample ID: 445172 Sample Dates: 3/14/2017
6/13/2017 Sample ID: 452203 Sample Dates: 6113/2017

-9/13/2017 Sample ID: 464585 Sample Dates: 9/1312017 -12/12/2017 Sample Point 045 [ INDICATOR

SSW@ 4.78 miles] Sample ID: 437275 Sample Dates: 12/13/2016

-3/14/2017 Sample ID: 445173 Sample Oates: 3/14/2017. 6/13/2017 Sample ID: 452204 Sample Dates: 6/13/2017 -9113/2017 Sample ID: 464586 Sample Dates: 9/13/2017 -12/12/2017 Samp l e Point 046 [ INDICATOR

SW@ 4.61 miles] Sample 1 0: 437276 Sample Dates: 12/13/2016. 3/14/2017 Sample ID: 445174 Sample Dates: 3/1412017
6/13/2017 Sample ID: 452205 Sample Oates: 6/13/2017.

9/13/2017 Sample ID: 484587 Sample Dates: V/13/2017 -12/12/2017 Report Generated@ 3/21/2018 14: 30: 38 Duke Energy Annual Report

Appendix E Nuclide mR/Std Qtr Nuclide mR/Std Q tr Nuclide mR/Std Qtr Nuclide mR/StdQt r Nuclide mR/Std Qtr Nuclide *mR/Std Otr Nuclide mR/Std Ot r Nuclide mR/$td0tr Nuclide mR/S t d Q t r Nuclide mR/StdQtr Nuclide mR/StdOtr Nuclide mR/StdOtr Nuclide mR/Std Qtr Nuclide mR/Std Otr Nuclide mR/StdQtr Nuclide mR/StdOtr Nuclide mR/Sld Qtr Nuclide mR/StdOt, Nuclide mR/StdQlr Nuclide mR/StdQtr Nuclide mR/StdOtr Nuclide mR/StdOt r EnRad Laboratories 13339 Hagers Ferry Road Huntersville , North Carolina 28078 Activity 12.20 Activ i ty 18.72 Activ i ty 2851 Act i vity 26.81 Activity 19.95 Activity 25.4 2 Activity 27 36 Activity 23 3 8 Activity 19 33 Activity 24.78 Activity 20 9 3 Activity 18 92 Activity 14 49 Activity 19.69 Act i vity 19 55 Activity 1 5 75 Activity 11 95 Activity 18 72 Activity 2654 Activity 22 45 Activity 17.97 Act i vity 2 3 11 TLO RING TLD_OUTER TLD RING TLD_OUTER TLD RING TLO_OUTER TLD RING TLD_OUTER TLO RING TLO_OUTER TLO R I NG TLD_OUTER Append i x E
Page 78 of 93 OCONEE Radiological Environmental Monitoring Analysis Report* 2017 (Appendix E) Media Type: TLD Concentration (Activity):

mR/Standard Quarter Sample Point 047 [ INDICATOR -WSW@ 3.58 miles] Sample ID: 437277 Sample Dates: 12/13/2016

3/14/2017 Sample ID: 445175 Sample Dates: 3/14/2017.

6/13/2017 Sample ID: 452206 Sample Dates: 6113/2017 -9/13/2017 Sample ID: 464588 Sample Oates: 9/13/2017 -12/12/2017 Sample Point 048 ( INDICATOR -W@ 3.64 miles J Sample ID: 437278 Sample Dates: 12/13/2016. 3/14/2017 Sample ID: 445176 Sample Dates: 3/14/2017 -6/13/2017 Sample ID: 452207 Sample Dates: 6/13/2017. 9/13/2017 Samp l e ID: 464589 Sample Dates: 9/13/2017 -12/12/2017 Sample Point 049 [ INDICATOR

WNW @ 3.6 miles ) Sample ID: 437279 Sample Dates: 12/13/2016

-3/14/2017 Sample ID: 445177 Sample Dates: 3/14/2017 -6/13/2017 Sample ID: 452208 Sample Dates: 6113/2017

9/13/2017 Sample ID: 464590 Sample Dates: 9/13/2017

-12/12/2017 Sample Point 050 ( IND I CATOR -NW @ 3.53 miles ) Sample ID: 437280 Sample Dates: 12/13/2016 -3/1412017 Sample ID: 445178 Sample Dates: 3/14/2017 -8/1312017 Sample ID: 452209 Sample Dates: 6/1312017 -9/1312017 Sample ID: 464591 Sample Dates: 9113/2017 -12/12/2017 Sample Point 051 ( INDICATOR -NNW@ 4.64 miles J Sample ID: 437281 Sample Dates: 12/13/2016 -3/1412017 Sample ID: 445179 Sample Dates: 3/14/2017 -6/13/2017 Sample ID: 452210 Sample Dates: 6/13/2017 -9/13/2017 Sample I D: 464592 Sample Dates: 9/1312017 -12/12/2017 Sample Point 052 (INDICATOR* ENE@ 12.4 miles) Sample ID: 437282 Sample Oatea: 12/13/2016

3114/2017 Sample ID: 445180 Sample Dates: 3/1412017

-6/1312017 Report Generated@ 3/21/2018 14: 30: 38 Duke Energy Annual Report -Appendix E Nuclide mRIStd Qtr Nuclide mR/StdQtr Nuclide mR1Std0tr Nuclide mR/Std Qtr Nuclide mR1S td0tr Nuclide mR/StdOtr Nuclide mRIStd at, Nuclide mRIStd Qtr Nuclide mR/Std Ctr Nuclide mR1Std0tr Nuclide mR/StdQtr Nuclide mR/StdQtr Nuclide mR/Std Qtr Nuclide mR/SldQtr Nuclide mRIStd Qtr Nuclide mRIStd Qtr Nuclide mRIStd Qtr Nuclide mR1Std0tr Nuclide mRIStd Qtr Nuclide mRIStd Ctr Nuclide mR/$td Qtr Nuclide mRIStd Ctr EnRad Laboratories 13339 Hagers Ferry Road Huntersville. North Carolina 28078 Activity 26 55 Activity 21.93 Activity 17 98 Activity 24.08 Activity 28 73 Activity 2519 Activity 19 39 Activity 26.13 Activity 25.42 Activity 20.86 Activity 14.99 Activity 2302 Activity 2204 Activity 16.52 Activity 12.66 Activity 18.24 Activity 22 64 Activity 18.37 Activity 12 75 Activity 18.58 Activity 2901 Activity 2266 TLD RING TLD_OUTER TLD RING TLD_OUTER TLD RING TLD_OUTER TLO RING TLD_OUTER TLO RING TLD_OUTER TLO RING TLD_SPEC Appendix E -Page 79 of 93 OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E)* Media Type: TLD Concentration (Activity): mR/Standard Quarter Sample Point 052 ( INDICATOR -ENE@ 12.4 miles) Sample ID: 452211 Sample Dates: 6/1312017 -911312017 Sample ID: 484593 Sample Dates: 9/13 1 2017 -12/12/2017 Sample Point 053 [ INDICATOR -E@ 11.7 miles) Sample ID: 437283 Sample Dates: 12/1312016

311412017 Sample ID: 445181 Sample Oates: 3114/2017 -6113/2017 Sample ID: 452212 Sample Dates: 6/1312017

-911312017 .Sample ID: 464594 Sample Dates: 9113 1 2017 -12/12/2017 Sample Point 054 [ INDICATOR -ESE@ 8.6 miles] Sample ID: 437284 Sample Dates: 12/1312016 -3114/2017 Sample ID: 445182 Sample Dates: 3/14/2017

611312017 Sample ID: 452213 Sample Dates: 6/1312017

-911312017 Sample ID: 464595 Sample Dates: 911312017 -12/12/2017 Sample Point 0!55 ( INDICATOR -SSE@ 9.27 miles) Sample ID: 437285 Sample Dates: 12/13/2016. 3114/2017 Sample ID: 445183 Sample Dates: 3/14/2017 -6/13/2017 Sample ID: 452214 Sample Dates: 6113/2017 -9/13/2017 Sample ID: 464596 Sample Dates: 9/13/2017 -12/12/2017 Sample Point 056 [ INDICATOR -SSW@ 7.3 miles] Samp141 ID: 437286 Sample Dates: 12/13/2016 -3/14/2017 Sample ID: 445184 Sample Dates: 3/14/2017 -6/13/2017 Sample 10: 452215 Sample Dates: 6/13/2017 -9/13/2017 Sample ID: 464597 Sample Dates: 9/13/2017 -12/12/2017 Sample Point 057 [ INDICATOR -SW@ 8.42 miles) Sampl*ID: 437287 Sample Dates: 12/13/2016 -3/1412017 Sample ID: 445185 Sample Oates: 3114/2017. 6/13/2017 Sample ID: 452216 Sample Oates: 6/13/2017 -9/13/2017 Sample ID: 464598 Sample Dates: 9/13/2017. 12/12/2017 Report Generated@ 3/21/2018 14.30: 38 Duke Energy Annual Report -Appendix E Nuclide mR/Std Qtr Nuclide mR/Sld Otr Nuclide mR/Std Qtr Nuclide mR/S l d Qlr Nuclide mR/StdOl r Nuclide mR/StdQtr Nuclide mR/Std Qtr Nuclide mR/S t d Otr Nuclide mR/Sld Qtr Nuclide mR/SldQ t r Nuclide mR/StdQtr Nuclide mR/StdQtr Nuclide mR/StdOtr Nuclide mR/SldQ t r Nuclide mR/SldOlr Nuclide mR/StdOtr Nuclide mR/StdQtr Nuclide mR/Std Otr Nuclide mR/StdQl r Nuclide mR/StdOtr Nuclide mR/Std Qtr Nuclide mR/Std Otr EnRad Laboratories 13339 Hagers Ferry Road Hunte r sville , North Ca r olina 28078 Activity 19.2 2 Activity 22.99 Activity 30 13 Activity 231 0 Activity 17 1 1 Activity 26 36 Activity 21-20 Activity 18.0 2 Activity 12 81 Activity 19.7 6 Activity 18 44 Activity 1 5 11 Activity 10 86 Activity 16 24 Activity 28.90 Activity

23.23 Activity 18 34 Activity 24.41 Activity 2 9 24 Activity 2 3.02 Activity 19.89 Act i vity 26.51 ----------, TLD RING TLD_SPEC TLD RING TLO_SPEC TLD RING TLO_SPEC TLD RING TLD_SPEC TLD RING TLO_SPEC TLD RING TLD_SPEC Appendix E -Page 80 ol 93 OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: TLD Concentration (Activity):

mR/Standard Quarter Sample Point 058 [ CONTROL* WSW@ 9.39 miles ] Sample ID: 437288 Sample Dates: 12/13/2016

3/1412017 Sample ID: 445186 Sample Dates: 3114/2017

-6113/2017 Sample ID: 452217 Sample Dates: 6113/2017 -911312017 Sample ID: 464599 Sample Dates: 9/13/2017 -12/12/2017 Sample Point 059 [INDICATOR* NW@ 9.2 mlles] Sample ID: 437289 Sample Dates: 12/13/2016. 3114/2017 Sample ID:. 445187 Sample Dales: 3/14/2017

6/13/2017 Sample ID: 452218 Sample Oates: 6/1312017. 9/13/2017 Sample ID: 464600 Sample Dates: 9/13/2017

-12/12/2017 Sample Point 076 [ INDICATOR

W @ 0.19 miles] Sample ID: 437290 Sample Dates: 12/13/2016.

3114/2017 Sample ID: 445188 Sample Dates: 3/14/2017. 6/13/2017 Sample ID: 452219 Sample Dates: 6/13/2017 -9/13/2017 Sample ID: 464601 Sample Dataa: 9113/2017 -12/12/2017 Sample Point 077 [INDICATOR* SW@ 1 miles] Sample ID: 437291 Sample Dates: 12/13/2016

3/14/2017 Sample ID: 445189 Sample Dates: 3/14/2017
6/13/2017 Sample ID: 452220 Sample Oates: 6/13/2017.

9/13/2017 Sample ID: 464602 Sample Dataa: 9/13/2017 -12/12/2017 Sample Point 078.1 [ INDICATOR -.WSW@ 0.53 miles] Sample ID: 437292 Sample Dates: 12/13/2016 -3/14/2017 Sample ID: 445190 Sample Dates: 3/1-4/2017. 6/13/2017 Sample ID: 452221 Sample Dates: 611312017. 9/13/2017 Sample ID: 464603 Sample Dates: 9/1312017 -12/12/2017 Sample Point 081 [CONTROL* SE@ 9.33 miles J Sample ID: 437293 Sample Dates: 12/13/2016 -3/14/2017 Sample ID: 445191 Sample Dates: 3/14/2017 -6/13/2017 Report Generated@ 3/21/201814

30*38 Duke Energy Annual Report -Appendix E Nuclide mR/StdQtr Nuclide mR/StdQtr Nuclide mR/Std Otr Nuclide mR/Std Qlr Nucllde mR/Std Qlr Nuclide mR/SldOtr Nuclide mR/Std Ott Nuclide mR/Std Q t r Nuclide mR/Std Otr Nuclide mR/StdOtr Nuclide mR/StdOtr Nuclide mR/Std Qtr Nuclide mR/Std Otr Nuclide mR/StdQtr Nucllde mR/StdOt, Nuclide mR/StdQtr Nucllde mR/StdQtr Nuclide mR/Std Otr Nuclide mR/StdQtr Nuclide mR/StdQtr Nuclide mR/Std Otr Nuclide mR/Std at, EnRad Laboratories 13339 Hagers Ferry Road Hunte r sville , North Carolina 28078 Activity 34.66 Activity 2861 Activity 23.68 Activity 31 78 Activity 27.67 Activity 23 39 Activity 1901 Activity 25.55 Activity 3113 Activity 23.2 6 Activity 1817 Activity 2614 Activity 21 41 Activity 17 47 Activity 12 13 Activity 17.04 Activity 29 72 Activity 2607 Activity 19 76 Activity 24.74 Activity 25.99 Activity 21 30 TLD RING TLD_CTRL TLD RING TLD_SPEC TLO RING TLD_INNER TLD RING TLD_SPEC TLD RING TLD_SPEC TLD RING TLD_CTRL Append i x E -Page 81 of 93 OCONEE Radiological Environmental Monitoring Analysis*Report -2017 (Appendix E) Media Type: TLD Concentration (Activity):

mR/Standard Quarter Sample Point 081 [ CONTROL -SE@ 9.33 mlles] Sample ID: 452222 Sample Dates: 6/13/2017 -9/13/2017 Sample ID: 464604 Sample Dates: 9/1312017 -1211212017 Sample Point 085 [ INDICATOR -NNW @ 0.88 miles ) Sample ID: 437294 Sample Oates: 12/13/2016 -3/1412017 Sample ID: 445192 Sample Dates: 3/14/2017 -6/13/2017 Sample ID: 452223 Sample Dates: 6/13/2017 -9/1312017 Sample ID: 464605 Sample Dates: 9113/2017 -1211212017 Sample Po int 086 [ INDICATOR -NW@ 0.83 miles) Sample ID: 437295 Sample Dates: 12113/2016 -3/1412017 Sample ID: 445193 Sample Dates: 3/14/2017 -6/13/2017 Sample ID: 452224 Sample Dates: 6/13/2017 -9/13/2017 Sample to: 484608 Sample Dates: 9/13/2017 -12/12/2017 Sample Point 087 (INDICATOR-WNW@ 1.33 miles) Sample ID: 437296 Sample Dates: 12/13/2016 -3114/2017 Sample ID: 445194 Sample Dates: 3/14/2017 -6/1312017 Sample ID: 452225 Sample Dates: 6/13/2017 -9/13/2017 Sample ID: 464607 Sample Dates: 9/13/2017 -12/12/2017 Sample Point 088 [ INDICATOR -SSW@ 1 miles J Sample ID: 437297 Sample Dates: 12113/2016 -3/14/2017 Sample ID: 445195 Sample Dates: 3/1412017 -6/13/2 017 Sample ID: 452226 Sample Dates: 6/13/2017 -9 1 13/2017 Sample ID: 464608 Sample Dates: 9/1312017 -12112/2017 Sample Point 089 [ INDICATOR -S @1.19 miles) Sample ID: 437293 Sample Dates: 12/13/2016 -3/14/2017 Sample ID; 445196 Sample Datea: 3/1412017 -611312 017 Sample ID! 452227 Sample Dates: 6113/2017 -9/13/2017 Sample 10: 464609 Sample DatH: 9/1312017 -12/12/2017 Report Generated@ 3/21/2018 14: 30: 38 Duke Energy Annual Report -Appendix E Nuclide mR/Std Qtr Nuclide mR/StdOtr Nuclide mR/Std Qtr Nuclide mR/Std Otr Nuclide mRIStdQtr Nuclide mRIStd Otr Nuclide mR/StdOt r Nuclide mR/StdOtr Nuclide mR/StdOlr Nuclide mR/Std Qtr Nuclide mR/Std Qtr Nuclide mR/Std Otr Nuclide mR/Std Otr Nuclide mR/Std Qtr Nucllda mR/StdQtr Nuclide mR/Std Qtr Nuclide mR/Std Qtr Nuclide mR/SldQt r Nuclide mR/Std Otr Nuclide mR/StdQtr Nuclide mR/StdQ t r Nuellde mR/Std Qtr EnRad Laboratories 13339 Hagers Ferry Road Huntersville , North Carolina 28078 Activity 17 92 Activity 28 3 Activity 24 22 Activity 18 25 Activity 15 20 Activity 1932 Activity 21.15 Activity 16 63 Activity 1242 Activity 16.84 Activity 20 16 Activity 1641 Activity 1216 Activity 18.59 Activity 23 38 Activity 18 74 Activity 16 52 Activity 21.43 Activity 25 55 Activity 20 57 Activity 16.99 Activity *23.24 TLD RING TLD_CTRL TLO RING TLD_SPEC TLD RING TLD_SPEC TLD RING TLO_SPEC TLD RING TLD SPEC TLO RING TLD_SPEC Appendix E -Page 82 of 93 OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: TLD Concentration (Activity)

mR/Standard Quarter Sample Point 090 ( INDICATOR

SE@ 0.79 miles] TLD RING TLD_SPEC Sample ID: 437299 Sample Dates: 12/13/2016

-3/14/2017 Nuclide Activity mRISldQtr 27 90 Sample ID: 445197 Sample Dates: 3/14/2017

6/13/2017 Nuclide Activity mRIStd Otr 21.97 Sample ID: 452228 Sample Dates: 6/13/2017

-9/13/2017 Nuclide Activity mR/Std Olr 19 73 Sample ID: 464610 Sample Dates: 9/13/2017 -12/12/2017 Nuclide Activity mR/Std Qtr 2586 Media Type: VEGETATION Concentration (Activity): pCi/kg wet Sample Point 077 [ INDICATOR

SW@ 1 miles] Sample ID: 432252 Sample Dates: 1/3/2017 -1/3/2017 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2 72E-+01 O.OOE+OO 2 72E+01 Co-58 <314E.0 1' O.OOE.00 3.14E+01 Fe-59 <6 53E.0 1 O.OOE+OO 6.53E+01 Co-60 <3 34E.0 1 O.OOE+OO 3 34E+01 Zn-65 <6 91E+0 1 O.OOE+OO 6.91E+01 Z r-95 <6 25E+01 O.OOE+OO 6.25E+01 Nb-95 <4 26E+01 O.OOE+OO 4.26E+01 1-131 <4 69E+01 O.OOE+OO 4.69E+01 Cs-134 <4 32E+01 0 OOE+OO 4 32E+01 Cs-137 <3.36E+01 0 OOE+OO 3 36E+01 Bala-140 <4 30E+01 0 OOE+OO 4 30E+01 Be-7 1.27E+03 3 27E+02 3 20E+02 K-40 2.41E+03 6 27E+02 5 58E+02 Sample ID: 435147 Sample Datu: 2/6/2017 -2/6/2017 MIXEDBLV Nuclide Activity 2 Sigma Error MOA Mn-54 <3 35E+01 0 OOE+OO 3.35E+01 Co-58 <3.48E+01 0 OOE+OO 3.48E+01 Fe-59 <5 75E+01 0 OOE+OO 5.75E+01 Co-60 <4 44E+01 0.00E+OO 4.44E+01 Zn-65 <5 26E+01 O.OOE+OO 5.26E+01 Zr-95 <5 79E+01 O.OOE+OO 5 79E+01 Nb-95 <351E+OI O.OOE+OO 3.51E+01 1-131 .-2 97E+01 O O OE+OO 2 97E+01 Cs-134 <3 43E+01 O.O OE+OO 3.43E+0 1 Cs-137 <3 11E+01 O.OOE+OO 3 11E+01 Bala-140 <4 01E+0 1 O O OE+O O 4 01E+0 1 Be-7 1 41E+03 3.53E+02 3 70E+02 K-40 2 37E+03 6 10 E+02 5 15E+02 Sample 10: 437627 Sample Datas: 3/6/2017 -3/6/2017 M I XEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <3.93E+01 0 OOE+OO 3 93E+01 C o-58 <3 31E+01 0 OOE+OO 3.31E+01 F e-59 <6 25E+01 O.OOE+OO 6.25E+01 C o-60 <3 99E+01 OOOE+OO 3.99E+01 Zn-65 <7 48E+01 0 OOE+OO 7.48E+01 Zr-95 <6 02E+01 0 OOE+OO 6.02E+01 Nb-95 <3 53E+01 O.OOE+OO 3 53E+01 1-131 <3 65E+01 O.OOE+OO 3.65E+01 Cs-134 <4 25E+01 O.OOE+OO 4 25E+01 Cs-137 <3.37E+01 O.OOE+OO 3 37E+01 Bala-140 <4 91E+01 O.OOE+OO 4 91E+01 Be-7 1.31E+03 3.44E+02 3 48E+02 K-40 2.43E+03 6.07E+02 3 83E+02 Sample ID: 440049 Sample Dates: 4/3/2017.

4/3/2017 MIXEDBLV Nuclide Activity 2 S i gma Error MOA Mn-54 <2 OOE+01 0 OOE+OO 2 OOE+01 C o-58 <1.99E+01 0 OOE+OO 1.99E+01 Fe-5 9 <5.70E+01 0 OOE+OO 5.70E+01 C'o-60 <2 91E+01 0 OOE+OO 2.91E+01 Zn-65 <5 54E+01 OOOE+OO 5 54E+01 Zr-95 <3 45E+01 0.00E+OO 3.45E+01 Nb-95 <211E+01 O.OO E+OO 2.11E+0 1 1-131 <3.06E+01 O.OOE+OO 3.06E+01 Cs-134 <3.39E+01 O.OOE+OO 3.39E+01 Report Generated@ 3/21/2018 14: 30;38 Cf!ID EnRad Laboratories Appendix E -Page 83 of 93 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersville , North Carolma 28078 OCONEE Radiological Environmental Monitoring Analysis Report .:: 2011 (Appendix E) Media Type: VEGETATION Concentration (Activity)

pCl/kgwet Sample Point 077 (INDICATOR*

SW@ 1 miles) Sample ID: 440049 Sample Dates: 4/3/2017 -4/3/2017 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Cs-137 <2.81E+01 O.OOE+OO 2.81E+01 Bala-140 <3.00E+01 O.OOE+OO 3.00E+01 Be-7 2.94E+03 4.68E+02 3.17E+02 K-40 3.88E+03 7.05E+02 2 70E+02 Sample ID: 442363 Sample Dates: 5/1/2017 -5/1/2017 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <3.79E+01 O.OOE+OO 3.79E+01 Co-58 <3.21E+01 O.OOE+OO 3.21E+01 Fe-59 <6.98E+01 O.OOE+OO 6.98E+01 Co-60 <4.63E+01 O.OOE+OO 4.63E+01 Zn-65 <7.20E+01 OOOE+OO 7.20E+01 Zr-95 <5.85E+01 OOOE+OO 5.85E+01 Nb-95 <3.15E+01 OOOE+OO 3.15E+01 1-131 <2.84E+01 OOOE+OO 2.84E+01 Cs-134 <3.18E+01 0 OOE+OO 3.18E+01 Cs-137 <3.09E+01 0 OOE+OO 3.09E+01 Bala-140 <3.85E+01 0 OOE+OO 3.85E+01 Be-7 3.74E+02 2.63E+02 3.99E+02 K-40 3.54E+03 7.76E+02 6 19E+02 Sample ID: 445367 Sample Dates: 8/5/2017 -6/5/2017 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <3.05E+01 O.OOE+OO 3 OSE+01 Co-58 <2.09E+01 O.OOE+OO 2 09E+01 Fe-59 <3.81E+01 O.OOE+OO 3.81E+01 Co.SO <1.87E+01 O.OOE+OO 1.87E+01 Zn-65 <5.30E+01 O.OOE+OO 5.30E+01 Zr-95 <4.01E+01 0.00E+OO 4 01E+01 Nb-95 <3.76E+01 O.OOE+OO 3.76E+01 1-1 31 <2.53E+01 O.OOE+OO 2.53E+01 Cs-134 <2.83E+01 O.OOE+OO 2.83E+01 Cs-137 <2.87E+01 0 OOE+OO 2.67E+01 Bala-140 <7.37E+OO OOOE+OO 7.37E+OO Be-7 5.61E+02 2 26E+02 3.01E+02 K-40 3.68E+03 6 31E+02 2.30E+02 Sample ID: 447849 Sample Dates: 7/3/2017 . 7/3/2017 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2 70E+01 0 OOE+OO 2 70E+0 1 Co-58 <2.44E+01 0 OOE+OO 2.44E+01 Fe-59 <6.79E+01 O.OOE+OO 6 79E+01 Co-60 <3.08E+01 O.OOE+OO 3 06E+01 Zn-6 5 <6.53E+01 O.OOE+OO 6 53E+01 Zr-95 <5.50E+01 O.OOE+O O 5 50E+01 Nb-95 <3.40 E+0 1 O.OOE+OO 3 40E+01 1*131 <3.17E+01 O.OOE+OO 3 17E+01 Cs-134 <3.65E+01 O.OOE+OO 3 65E+01 Cs 137 <2.61E+01 O.OOE+OO 2 61E+01 Bala-14 0 <2.4 4E+01 O.OOE+OO 2 44E+01 B e-7 2.12E+03 3.85E+02 2.96E+02 K-40 4.40E+03 8.03E+02 5 76E+02 Sample ID: 450249 Sample Dates: 817/2017

817/2017 MIXEOBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <3.55E+01 OOOE+OO 3 55E+01 Co-5 8 <3.01E+01 0 OOE+OO 3.01E+0 1 Fe 5 9 <5.33E+01 0 OOE+OO 5 33E+01 Co-6 0 <3.16 E+0 1 O.OOE+OO 3.16E+01 Zn-65 <5.94E+01 O.OOE+OO 5 94E+01 Z r-95 <5.41E+0 1 O.OOE+OO 5.41E+01 Nb-95 <2.80E+01 O.OOE+OO 2 60E+01 1-131 <2.19E+01 O.OOE+OO 2 19E+01 Cs-134 <3.25E+01 O.OOE+OO 3.25E+01 Cs-137 <3.24E+01 O.OOE+OO 3.24E+01 Bala*1 40 <3.45E*01 O.OOE+OO 3.45E+01 Be-7 1.66E+03 3 57E+02 3.43E+0 2 K-40 4.30E+03 7 54E+02 3.71E+02 Sample ID: 452407 Sample Datea: 9/5/2017
9/5/2017 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2.56E+01 -OOOE+OO 2.56E+0 1 Co-58 <2.0 1E+01 0 OOE+OO 2.01E+0 1 Report Generated

@ 312112018 14: 30: 38 c fn ffi) EnRad laborator i es Appendix E -Page 84 of 93 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersville , North Carohna 28078 OCONEE Radiological Environmental Monitoring Analysis Report. 2017 (Appendix E) Media Type: VEGETATION Concentration (Activity)

pCi/kg wet Sample Point 077 [ INDICATOR

-SW@ 1 miles J Sample ID: 452407 Sample Dates: 9/5/2017

9/5/2017 MIXEDBLV Nucllde Activity 2 Sigma Error MDA Fe-59 <5.27E+01 O.OOE+OO 5 27E+01 Co-60 <2.08E+01 0 OOE+OO 2 06E+01 Zn-65 <5.51E+01 O.OOE+OO 551E+01 Zr-95 <4 14E+01 O.OOE+OO 4 14E+01 Nb-95 <2.48E+01 0 ODE+OO 2 48E+01 1-131 <2.32E+01 0 OOE+OO 2 32E+01 Cs-134 <4 56E+0 1 OOOE+OO 4 56E+01 Cs-137 <2.60E+01 OOOE+OO 2 60E+Of Bala-140 <2.79E+01 0 OOE+OO 2 79E+01 Be-7 1 64E+03 3 27E+02 2 75E+02 K-40 3 35E+03 6 44E+02 3 89E+02 Sample ID: 455117 Sample Dates: 10/212017

-10/2/2017 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2 80E+D1 DOOE+OO 2 80E+01 Co-58 <2 95E+01 OOOE+OO 2.95E+01 Fe-59 <4 94E+D1 OOOE+OO 4.94E+01 Co-60 <2 80E+01 O.OOE+OO 2.80E+01 Zn-65 <4 88E+01 0.00E+OO 4.88E+01 Zr-95 <5 12E+01 0 OOE+OO 5.12E+01 Nb-95 <3.15E+01 O , OOE+OO 3 15E+01 1-131 <2.82E+01 O.OOE+OO 2.82E+01 Cs-134 <3.72E+01 OOOE+OO 3 72E+01 Cs-137 <2.48E+01 0 OOE+OO 2.48E+01 Bala-140 <2 85E+01 O.OOE+OO 2 85E+01 Be-7 1.10E+03 282E+02 3 29E+02 K-40 3.28E+03 6 16E+02 4 64E+02 Sample ID: 462644 Sample Dates: 11/6/2017 -1116/2017 MIXEDBLV Nucllde Activity 2 Sigma Error MDA Mn-54 <4., 13E+01 0 OOE+OO 4 13E+01 Co-58 <4 79E+01 0 OOE+OO 4 79E+01 Fe-59 <6 05E+01 OOOE+OO 6 05E+01 Co-60 <4 85E+01 OOOE+OO 4 85E+01 Zn-65 <8 90E+01 OOOE+OO 8.90E+01 Zr-95 <8 50E+01 0 OOE+OO 8 50E+01 Nb-95 <5 OOE+01 OOOE+OO 5.00E+01 1-131 <4 42E+01 OOOE+OO 4 , 42E+01 Cs-134 <4 79E+01 0 OOE+OO 4 79E+01 Cs-137 <S 10E+01 O.OOE+OO 5.10E+01 Bala-140 <5 69E+01 O.OOE+OO 5.69E+01 Be-7 3 35E+03 6.04E+02 5 54E+02 K-40 4 76E+03 9.22E+02 5.57E+02 Sample ID: 464741 Sample Dates: 12/412017 -12/412017 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2 96E+01 OOOE+OO 2 96E+01 Co-58 <3. 10E+01 O.OOE+OO 3 10E+01 Fe-59 <5 16E+01 0 OOE+OO 5 1SE+01 Co-60 <2.89E+01 0 OOE+OO 2 89E+01 Zn-65 <5.90E+01 OOOE+OO 5 90E+01 Zr-95 <S 11E+01 0 OOE+OO 51 1 E+01 Nb-95 <3 36E+01 0 OOE+OO 3 36E+01 1-131 <4 79E+01 OOOE+OO 4 79E+01 Cs-134 <3.44E+01 0 OOE+OO 3.44E+0 1 Cs-137 <3 20E+01 0 OOE+OO 3.20E+01 Bala-140 <4 04E+01 O.OOE+OO 4.0 4E+01 Be-7 1 34E+03 2 21E+02 2.98E+02 K-40 5 16E+03 6.71E+02 4 44 +0 2 Sample Point 079 [ INDICATOR -NE@ 0.56 miles J Sample ID: 432253 Sample Dates: 1/312017

1/3/2017 MIXEDBLV Nuclide Activity 2 S igma Error MDA Mn-54 <2.81E+01 O.OOE+OO
2.81E+01 Co-58 <1 96E+01 O.OOE+OO 1 9SE+01 Fe-59 <5.28E+01 0.00E+OO 5 28E+01 Co-60 <1 , 54E+01 O.OOE+OO 1 54E+01 Zn-65 <5 53E+01 0 OOE+OO 5 53E+01 Zr-95 <5.06E+01 0 OOE+OO 5 0SE+01 Nb-95 <2.41E+01 0 OOE+OO 2 41E+01 1-131 <3 04E+01 OOOE+OO 3.04E+01 Report Generated@

3121/201814 '30: 38 EnRad L aboratories Appendix E

Page 85 of 93 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersv i l e , North Carolina 28078 OCONEE Radiological Environmental Monitoring Analysis Report
2017 (Appendix
E) Media Type: VEGETATION Concentration (Activity)

pCi/kg wet Sample Point 079 [ INDICATOR

-NE@ 0.56 miles] Sample ID: 432253 Sample Dates: 1/3/2017 -1/3/2 017 MIXEDBLV Nuclide Activity 2 S fg ma Error MDA Cs-134 <313E+01 OOOE+OO 3 13E+01 Cs-137 <2 41E+01 OOOE+OO 2.41E+01 Bala-140 <2 68E+01 OOOE+OO 268E+01 Be-7 2 50E+03 4 11E+02 2 94E+02 K-40 2 83E+03 5 64E+02 3 30E+02 Sample ID: 435148 Sample DatH: 2/6/2017 -2/6/2017 MIXEDBLV Nuclide Activity 2 S igma Error MDA Mn-54 <2 48E+01 OOOE+OO 2 48E+01 Co-58 <2 15E+01 0 OOE+OO 2 15E+01 Fe-59 <2 86E+01 0 OOE+OO 2 86E+01 Co-60 <2 39 E+0 1 O.OOE+OO 2 39E+01 Zn-65 <4 16E+01 O.OOE+OO 4 16E+01 Zr-95 <3.90E+01 O.OOE+OO 390E+01 Nb-95 <1 96E+01 O.OOE+OO 1 96E+01 1-131 <2 53E+01 O.OOE+OO 2 53E+01 Cs-134 <3.09E+01 O.OOE+OO 3 09E+01 Cs-137 <2.10E+01 O.OOE+OO 2 10E+01 Bala-140 <3.05E+01 0.00E+OO 3 05E+0 1 Be-7 2.64E+03 4.06E+02 2 69E+02 K-40 3.03E+03 5.71E+02 2 98E+02 Sample ID: 437628 Sample Dates: 316/2017 -3/6/2017 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <4 17E+01 O.OOE+OO 4 17E+01 Co-58 <3 38E+01 0 OOE+OO 3.38E+01 Fe-59 <6 39E+01 0 OOE+OO 6.39E+01 Co-60 <2 29E+01 0 OOE+OO 2.29E+01 ZrH>5 <8 15E+01 OOOE+OO 8 15E+01 Zr-95 <5 21E+01 OOOE+OO 5 21E+01 Nb-95 <3 29E+01 OOOE+OO 3 29E+01 1-131 <4 10E+01 0 OOE+OO 4 10E+01 Cs-134 <4 OOE+01 0 OOE+OO 4 OOE+01 Cs-137 <3 45E+01 0 OOE+OO 3.45E+01 Bala-140 <1 13E+01 0 OOE+OO 1 13E+01 Be-7 1 76E+03 4 03E+02 3 84E+02 K-40 2 76E+03 7 10E+02 6 26E+02 Sample ID: 440050 Sample Dates: 4/3/2017 -41312017 MIXEDBLV Nuclide Activity 2 S i gma Error MDA Mn-54 <2 25E+01 O.OO E+OO 2 25E+0 1 Co-58 <1.99E+01 O.OOE+OO 1 99E+01 F'e-59 <4.86E+01 O.OOE+OO 4.8 6E+01 Co-60 <2.24E+01 O.OOE+OO 2 24E+01 Zn-65 <6.80E+01 O.OOE+OO 6.80E+01 Zr-95 <4.08E+01 0 OOE+OO 4.08E+01 Nb-95 <2.39E+01 0 OOE+OO 2.39E+01 1-131 <2 30E+01 0 OOE+OO 2.30E+0 1 C s-134 <3 21E+01 0 OOE+OO 3.21E+01 C s-137 <2 93E+01 0 OOE+OO 2.93E+01 Bsl a-140 <2 55E+01 0 OOE+OO 2.55E+01 Be-7 . 2 52E+03 4 03E+02 2.80E+02 K-40 3.44E+03 6 38E+02 3.91E+02 Sample ID: 442364 l?ample Dates: 5/1/2017 -5/1/2017 MIXEDBLV Nuclide Act i vity 2 Sigma Error MDA Mn-54 <3.06E+01 0 OOE+OO 3 06E+01 C o,5 8 <2.93E+01 0 OOE+OO 2 93E+01 Fe-59 <7 07E+01 O.OOE+OO 7.07E+01 C o-60 <4.22E+01 O.OOE+OO 4 22E+01 ZIH>S <8.45E+01 O.OOE+OO 8 45E+01 Zr-95 <5.58E+01 0.00E+OO 5.58E+01 Nb-95 <3.41E+01 O.OOE+OO 3.41E+01 1-131 <3.70E+01 O.OOE+OO 3.70E+01 C s-134 <3.09E+01 0 OOE+OO 3.09E+01 C s-137 <3.99E+01 O.OOE+OO 3.99E+01 Ba a-140 <2.77E+01 O.OOE+OO 2 77E+0 1 Be-7 2.84E+02 2 18E+02 3.35E+02 K-40 3 84E+03 7 78E+02 5.98E+02 Sample ID: 445368 Sample Dates: 6/512017 -6/5/2Q17 MJXEDBLV Nuclide Activity 2 Sigma Error MOA Mn-54 <2 75E+01 OOOE+OO 2 75E+01 Report Generated@ 3/21/2018 14 30: 38 c f!ID EnRad Laborato ri es Appendix E -Page 86 of 93 Duke Energy Annua l Report -Appendix E 13339 Hagers Ferry Road Huntersville , North Carolina 28078 OCONEE Radiological Environmental Monitoring Analysis Report-2017 (Appendix E) Media Type: VEGETATION Concentration (Activity)

pCl/kg wet Sample Point 079 [ INDICATOR

NE@ 0.56 miles] Sample ID: 445368 Sample Dates: 6/5/2017
615/2017 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Co-58 <3.52E+01 O.OOE+OO 3.52E+01 Fe-59 <6.29E+01 OOOE+OO 6.29E+01 Co-60 <3.09E+01 O.OOE+OO 3.09E+01 Zn-65 <7.64E+01 O.OOE+OO 7.64E+0 1 Zr-95 <5.98E+01 O.OOE+OO 5.98E+01 Nb-95 <3.55E+01 O.OOE+OO 3 55E+01 1-131 <2.87E+01 O.OOE+OO 2.87E+0 1 Cs-134 <3.18E+01 O.OOE+OO 3 181:+01 Cs-137 <3.06E+01 O.OOE+OO 3 06E+01 Bala-140 <2 99E+01 O.OOE+OO 2.99E+01 Be-7 6.9BE+02 2.34E+02 2 90E+02 K-40 3.57E+03 6.51E+02 4 03E+02 Sample ID: 447850 Sample Dates: 7/3/2017
7/3/2017 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <3.11E+01 O.OOE+OO 311E+01 Co-58 <3.1 2E+01 O.OOE+OO 3 12E+01 Fe-59 <7 95E+01 O.OOE+OO 7 95E+01 Co-60 <3.23E+01 O.OOE+OO 3.23E+01 Zn-65 <6.30E+01 O.OOE+OO 6 30E+01 Zr-95 <7.03E+01 O.OOE+OO 7 03E+01 Nb-95 <2.67E+01 0.00E+OO 2 67E+01 1-131 <3.49E+01 O.OOE+OO 3.49E+01 Cs-134 <2 50E+01 OOOE+OO 2 50E+01 Cs-137 <3 1BE+01 OOOE+OO 3.1BE+01 Bala-140 <3 94E+01 OOOE+OO 3.94E+01 Be-7 6 69E+02 2 71E+02 3.41E+02 K-40 3.45E+03 7.41E+02 4 75E+02 Sample ID: 450250 Sample Dates: 8/7/2017 -6/7/2017 M I XEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <3.34E+01 0 OOE+OO 3.34E+01 Co-58 <4 48E+01 O.OOE+OO 4.48E+0 1 Fe-59 <5.96E+01 O.OOE+OO 5.96E+0 1 Co-60 <2 70E+01 O.OOE+OO 2 70E+01 Zn-65 <7.16E+01 O.OOE+OO 7 16E+01 Zr-95 <7 16E+01 O.OOE+OO 7 16E+01 Nb-95 <3.51E+01 O.OOE+OO 3 51E+01 1-131 <2.83E+01 O.OOE+OO 2 83E+01 c,-134 <3.92E+01 O.OOE+OO 3 92E+01 Cs-137 <3.52E+01 0.00E+OO 3 52E+01 Ba l a-140 <4.15E+01 O.OOE+OO 4 15E+01 B e-7 6.09E+02 2 57 E+02 3 32E+02 K-40 3.47E+03 6 95E+02 7 90E+0 1 Sample 10: 452408 Sample Oates: 9/5/2017 -9/5/2017 MIXEDBLV Nuclide Act ivi ty 2 Sigma Error MDA Mn-54 <4 28E+01 0 OOE+OO 4.28E+01 Co-58 <3 73E+01 0 OOE+OO 3.73E+01 e-59 <6 15E+01 O.OOE+OO 6 15E+01 C o-60 <3.92E+01 0 OOE+O O 3.92E+01 Zn-65 <6.2BE+01 0 OOE+OO 6.28E+0 1 Zr-95 <6.21E+01 0 OOE+OO 6.21E+01 Nb-95 <4.59E+01 O.OOE+OO 4.59E+01 1-131 <3.35E+01 OOOE+OO 3 3SE+01 Cs-134 <4.36E+01 O.OOE+OO 4.36E+01 C s-137 <4.26E+01 0.00E+OO 4 26E+01 Ba l a-140 <4.30E*01 O.OOE+OO 4 30E+01 Be-7 1.09E*03 3.51E+02 4 33E+02 K-40 4.69E+03 8.60E+02 3 76E+02 Sample 10: 455118 Sample Dates: 10/2/2017

-10/212017 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2 70E+0 1 O.OOE+OO 2 70E+01 C o-58 <2.60E+01 O.OOE+OO 2 60E*01 Fe-59 <3.82E+01 O.OOE+OO 3 B2E+01 C o-60 <2.7BE+01 O.OOE+OO 2 78E+01 Zn-65 <6 42E+01 0 OOE+OO 6.42E+01 Zr-95 <3.48E+01 OOOE+OO 3.48E+01 Nb-95 <2 60E+01 OOOE+OO 2 60E+01 1-131 <2 38E+01 OOOE+OO 2.3BE+01 C s-134 <2 90E+01 OOOE+OO 2 90E+01 Report Generated@ 3/21/2018 14*30'38 cf[ij) EnRad Laboratories Appendix E -Page 87 of 93 Duke Energy Annua l Report -Appendix E 13339 Hagers Ferry Road Huntersville , North Carol i na 28078 OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: VEGETATION Concentration (Activity): pCl/kg wet Sample Point 079 [ INDICATOR -NE@ 0.56 miles] Sample ID: 455118 Sample Dates: 10/2/2017 -10/2/2017 Sample ID: 462645 Sample Dates: 11/6/2017 -11/6/2017 Sample ID: 464742 Sample Dat&1: 12/4/2017 -12/412017 Sample Point 081 [ CONTROL -SE @ 9.33 miles ] Sample ID: 432254 Sample Dates: 1/3/2017 -1/3/2017 Sample ID: 435149 Sample Dates: 2/6/2017 -2/6/2017 Report Generated@ 3/21/2018 14.30.38 Duke Energy Annual Report -Appendix E MIXEDBLV Nuclide Cs-137 BaLa-140 Be-7 K-40 MIXEDBLV Nuclide Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr-95 Nb-95 1-131 Cs-134 Cs-137 BaLa-140 Be-7 K-40 MJXEDBLV Nuclide Mn-54 Co-56 Fe-59 Co-60 Zn-65 Zr-95 Nb-95 1-131 Cs-134 Cs-137 Bala-140 Be-7 K-40 MIXEDBLV Nucllda Mn 54 Co-58 Fe-59 Co-60 Zn-65 Zr-95 Nb-9S 1-1 31 Cs 134 Cs*137 Ba La-140 B e-7 K-40 MIXEDBLV Nuclide Mn-54 Co*58 Fe-59 Co-60 Zn-{)5 Zr-95 Nb-95 1-131 Cs-134 Cs-137 BaLa-140 Be-7 K-40 EnRad Laboratories 13339 Hagers Ferry Road Huntersville , North Carolina 28078 Activity <2.14E+01 <3.58E+01 1.13E+0 3 4.76E+03 Activity <3.66E+01 <3.80E+01 <8.20E+01 <4.75E+01 <8.83E+01 <6.59E+01 <4.03E+01 <3.94E+01 <4.64E+01 <3.83E~01 <6.73E+01 1.17E+03 4.38E+03 Activity <2.66E+01 <2.44E+01 <5.23E+01 <3.08E+01 <5.31E+01 <4.68E+01 <2.78E+01 <3.51E+01 <2.84E+01 <2.63E+01 <4.35E+01 1.56E+03 4.82E+03 Activity <2 17E+01 <2 04E+01 <5.22E+01 <2 22E+01 <7 93E+01 <3.55E+01 <3.23E+01 <3.58E+01 <2.42E+01 <2.88E+01 <4.28E+01 9 13E+02 <3 39E+02 Activity <2 18E+01 <2 50E+01 <3 92E+01 <2 27E+01 <3 95E+01 <5.01E+01 <1 66E+01 <2.05E+01 <3.65E+01 <2.45E+01 <2.00E+01 9 75E+02 4.62E+03 2 Sigma Error MDA O.OOE+OO 2 14E+01 O.OOE+OO 3.58E+01 2.57E+02 2.77E+02 6.90E+02 2 45E+02 2 Sigma Error MDA O.OOE+OO 3.66E+01 O.OOE+OO 3.80E+01 O.OOE+OO 8.20E+01 O.OOE+OO 4.75E+01 O.OOE+OO 8.83E+01 O.OOE+OO 6.59E+01 0 OOE+OO 4.03E+01 0 OOE+OO 3.94E+01 OOOE+OO 4.64E+01 0 OOE+OO 3.83E+01 O.OOE+OO 6 73E+01 1.92E+02 4.07E+02 8.39E+02 8 13E+02 2 Sigma Error MDA O.OOE+OO 2 66E+01 O.OOE+OO 2.44E+01 O.OOE+OO 5 23E+01 O.OOE+OO 3.08E+01 O.OOE+OO 5.31E+01 O.OOE+OO 4 68E+01 O.OOE+OO 2 78E+01 O.OOE+OO 3.51E+01 0.00E+OO 2.84E+01 0 OOE+OO 2.63E+01 O.OOE+OO 4.35E+01 1 62E+02 2.63E+02 6 25E+02 4.42E+02 2 Sigma Error MDA 0 OOE+OO 2 17E+01 0 OOE+OO 2 04E+01 0 OOE+OO 5 22E+01 OOOE+OO 2 22E+01 O.OOE+OO 7 93E+01 O.OOE+OO 3 55E+01 O.OOE+OO 3 23E+01 0.00E+OO 3.58E+01 O.OOE+OO 2 42E+01 0 OOE+OO 2 , 88E+01 0 OOE+OO 'l.28E+01 2 52E+02 2 50E+02 0 OOE+OO 3.39E+02 2 Sigma Error MDA 0 OOE+OO 2.18E+01 0 OOE+O O 2 50E+01 0 OOE+OO 392E+01 OOOE+OO 2 27E+01 0 OOE+OO 3 95E+01 O.OOE+OO 5 01E+01 O.OOE+OO 166E+01 O.OOE+OO 205E+01 O.OOE+OO 3.65E+01 0 OOE+OO 2.45E+01 O.OOE+OO 2 OOE+01 2 72E+02 3.15E+0 2 7 27E+02 5 74E+01 Appendix E -Page 88 of 93 OCONEE Radiological Envlronmental Monitoring Analysis Report -2017 (Appendix E) Media Type: VEGETATION Concentration (Activity): pCi/kg wet Sample Point 081 [ CONTROL -SE @ 9.33 miles J Sample ID: 437629 Sample Dates: 3/6/2017 -3/6/2017 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <1.90E+D1 O.OOE+OO 1.90E+01 Co-58 <1 47E+01 O.OOE+OO 1.47E+01 Fe-59 <3.13E+01 0.00E+OO 3 13E+01 Co-60 <2.29E+01 O.OOE+OO 2.29E+01 Zn-65 <3.48E+01 0 OOE+OO 3.48E+01 Zr-95 <2.88E+01 0 OOE+OO 2 88E+01 Nb-95 <1.33E+01 O.OOE+OO 1 33E+01 1-131 <1 36E+01 0 OOE+OO 1 36E+01 Cs-134 <1 , 96E+01 0 OOE+OO 1 96E+01 Cs-137 <1.61E+01 O.OOE+OO 1 61E+01 Bala-140 <1 91E+01 0 OOE+OO 191E+01 Be-7 4.08E+02 1 56E+02 1 99E+02 K-40 4 66E+03 6 69E+02 2 94E+02 Sample ID: 440051 Sam pie Dates: 4/3/2017 . 4/3/2017 M I XEDBLV Nuclide Activity 2 Slgma_Error MDA Mn-54 <318E+01 0 OOE+OO 3 18E+01 Co-58 <2 71E+01 0 OOE+OO 2 71E+01 Fe-59 <4 88E+01 OOOE+OO 4 88E+01 Co-60 <3 35E+01 0 OOE+OO 3 35E+01 Zn-65 <6 57E+01 0 OOE+OO 6 57E+01 Zr-95 <4 70E+01 0 OOE+OO 4 70E+01 Nb-95 <2 07E+01 0 OOE+OO 2.07E+01 1-13 1 <2 45E+01 0 OOE+OO 2 45E+01 Cs-134 <3 45E+01 0 OOE+OO 3.45E+01 Cs-1 37 <3 08E+01 0 OOE+OO 3.08E+0 1 Bala-1 40 <2 94E+01 O.OOE+OO 2 94E+0 1 Be-7 1 74E+03 3 54E+02 3.21E+02 K-40 3 75E+03 7 21E+02 5.15E+0 2 Sample ID: 442365 Sample Dates: 511 1 2017 -511/2011 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <3 12E+01 O.OOE+OO 3 12E+01 Co-58 <2 86E+01 O.OOE+OO 2.86E+01 Fe-59 <6.59E+01 O.OOE+OO 6.59E+01 Co-60 <2.81E+01 0.00E+OO 2 81E+01 Zn-65 <6.84E+01 O.OOE+OO 6 84E+01 Zr-95 <5.20E+01 0 OOE+OO 5 20E+01 Nb-95 <3.97E+01 O.OOE+OO 3 97E+01 1-131 <2 77E+01 O.OOE+OO 2 77E+0 1 Cs-134 <3.63E+01 O.OOE+OO 3 63E+01 Cs-1 37 <3.58E+01 O.OOE+OO 3 58E+01 Bala-1 40 <2.74E+01 O.OOE+OO 2 74E+01 B e-7 6 99E+02 2.67E+02 3 43E+02 K-40 3. 75E+03 7.29E+02 4 19E+02 Sample ID: 445369 Sample Dates: 6/512017

615/2017 M IXE DBLV Nuclide Activity 2 Sigma Error MDA M n-54 <2 01E+01 0 OOE+OO 2 01E+01 Co-58 <2 12E+01 0 OOE+OO 2.12E+01 Fe-59 <4.01E+01 O.OOE+OO 4 01E+01 C0-60 <2.55E+01 O.OOE+OO 2 55E+01 Zn-65 <5.91E+01 O.OOE+OO 5 91E+01 Zr-95 <4.36E+01 O.OOE+OO 4.36E+01 Nb-95 <2.06E+01 O.OOE+OO 2.06E+01 1-131 <2.56E+01 0.00E+OO 2 56E+01 Cs-134 <2 50E+01 O.OOE+OO 2.50E+01 Cs-137 <2.61E+01 O.OOE+OO 2.61E+01 Bala-140 <2.82E+01 O.OOE+OO 2.82E+01 Be-7 1.07E+03 2.35E+02 1.92E+02 K-40 4 09E+03 6.79E+02 3 66E+02 Sample ID: 447851 Sample Dates: 7/3/2017 -7/3/2017 MIXEDBLV Nuclide Activ i ty 2 Sigma Error MOA Mn54 <2.31E+01 O.OOE+OO 2 31E+01 Co-56 <2.09E+01 O.OOE+OO 2.09E+0 1 Fe-59 <5.58E+01 O.OOE+OO 5.58E+0 1 C o-60 <1.87E+01 O.OOE+OO 1 87E+01 Zn-65 <5.28E+01 0.00E+OO 5 28E+01 Z r-95 <4.38E+01 0 OOE+OO 4 38E+01 Nb-95 <2.28E+01 0 OOE+OO 2 26E+01 1-131 <2.20E+01 0 OOE+OO 2 20E+01 Report Generated@

3/21/2018 14: 30 38 C f!_@ EnRad Laboratories Appendix E -Page 89 of 93 Duke Energy Annual Report

Appendix E 13339 Hagers Ferry Road Huntersv i lle. North Carol i na 28078 OCONEE Radiological Environmental Monitoring Analysis Report* 2017 (Appendix E) Media Type: VEGETATION Concentration (Activity)

pCi/kg wet Sample Po i nt 081 [ CONTROL -SE@ 9.33 miles J Sample ID: 447851 Sample Dates: 7/3/2017 -7/312017 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Cs-134 <2 92 E+01 0 OOE+OO 2.9 2 E+01 C s-137 <3 08E+01 0 OOE+OO 3.08E+01 Bala-140 <265E+01 0 OOE+OO 2.6 5 E+01 Be-7 1 69E+03 3 26E+02 286E+02 K-40 4 73E+03 7 38E+0 2 2 94E+02 Sample JD: 450251 Sample Dates: 8/7/2017

817/2017 MIXEDBLV Nuclide Activity 2 S i gma Error MDA Mn-54 <2 16E+01 0 OO E+O O 2 1 6 E+01 Co-58 <2 3 1E+01 0 OOE+OO 2 31E+01 Fe-59 <4 93E+01 0 OOE+OO 4.93E+01 Co-60 <4.01E+01 OOO E+OO 4.01E+0 1 Zn-65 <5 9 1E+01 0 OOE+OO 5 91E+0 1 Zr-9 5 <2 64E+01 0 OOE+OO 2.64E+01 Nb-95 <2.24E+01 OOO E+OO 2 24E+01 1-1 3 1 <2.01E+01 0 OOE+OO 2 01E+01 Cs-1 3 4 <3.22E+01 0 OOE+OO 3 22E+0 1 Cs-137 <2.53E+01 0 OOE+OO 2 53E+01 Bala-140 <2.36E+01 0 OOE+OO 2 36E+01 B e-7 1 74E+03 3.59E+02 3.3 1 E+0 2 K-40 4.6 1 E+03 8.1 1 E+02 5.03E+0 2 Sample ID: 452409 Sample Dates: 9/5 1 2017
9/5/2017 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2.85E+01 O.OOE+OO 2 8SE+01 Co-58 <2.27E+01 O.OOE+OO 2 27E+01 Fe-59 <4.89E+01 O.OOE+OO 4.89E+01 Co-60 <3.86E+01 0.00E+OO 3.86E+01 Zn-65 <5 OSE+01 0 OOE+OO 5.05E+01 Zr-95 <3.43E+01 O.OOE+OO 3.43E+01 Nb-95 <3 04E+01 , O.OOE+OO 3.04E+0 1 1-131 <2 58E+01 O.OOE+OO 2.58E+01 Cs-134 <3 52E+01 O.OOE+OO 3.52E+01 Cs-137 <2 76E+01 O.OOE+OO 2.76E+01 Bala-140 <2 76E+01 O.OOE+OO 2.76E+01 Be-7 2 27E+03 4.06E+02 3.52E+0 2 K-40 4 30E+03 7 3 9 E+02 3.94E+02 Sample ID: 455119 Sample Dales: 10/2/2017

-10/2/2017 MIXEDBLV Nuclide Activ i ty 2 Sigma Error MDA Mn-54 <1 88E+01 0 OOE+OO 1.88E+01 Co-5 8 <161E+01 0 OOE+OO 1 61E+0 1 F e-59 <3 47E+01 O.OO E+OO 3.4 7 E+0 1 Co-60 <2 18E+0 1 0 OOE+OO 2 18E+01 Zn-65 <3.37E+0 1 O.OOE+OO 3.37E+0 1 Zr-9 5 <3.68E+0 1 OOO E+OO 3 68E+01 Nb-9 5 <1 94E+01 OOOE+OO 1 94E+01 1-131 <1.64E+01 OOOE+OO 1 64E+01 Cs-134 <2.40E+01 OOOE+OO 2 40E+0 1 Cs-137 <1 93E+01 0 OOE+OO 1 93E+0 1 Ba l a-140 <2 17E+01 0 OOE+OO 2 17E+01 Be-7 1.88E+03 2 90E+02 2 35E+02 K--4 0 3.49E+03 5 27E+02 3 52E+02 Sample JD: 482646 Sample Dates: 11/6/2017 -11/6/2017 M I XEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <4.17E+01 O.OOE+OO 4 17E+0 1 Co-58 <3.26E+01 O.OOE+OO 3.26E+01 Fe-59 <7.26E+01 OOOE+OO 7 26E+0 1 Co-60 <4.6 3E+01 0.00E+OO 4.63E+0 1 Zn-65 <9 33E+01 OOOE+OO 9.33E+0 1 Zr-95 <6.61E+01 O.OOE+OO 6 61E+0 1 Nb-95 <4 38E+01 O.OOE+OO 4.38E+01 1*131 <4 31E+01 0 OOE+OO 4.31E+01 Cs*134 <4 72E+01 OOOE+OO 4 72E+01 Cs-137 <4.4SE+01 O.OOE+OO 4.46E+01 Bala-14 0 <4 09E+01 0 OOE+OO 4 09E+01 Be*7 114E+03 3 1 8E+02 4.19E+02 K-4 0 9.87E+03 1 22E+03 6 59E+02 Sample JD: 464743 Sampl4\ Dates: 12/4/2017 -12/4/2017 MIXEDBLV Nuclide Act i vity .2 Sigma Error MDA Mn-54 <2.44E+01 0 OOE+OO 2 44E+01 Report Generated@ 3/21/2018 14: 30 38 c (i@ EnRad Laboratories Appendix E

Page 90 of 93 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Hunlersville. North Carol i na 28078 OCONEE Radiologlcal Environmental Monitoring Analysis Report. 2017 (Appendix E) Media Type: VEGETATION Concentration (Activity)

pCl/kg wet Sample Point 081 [ CONTROL -SE@ 9.33 miles) Sample ID: 464743 Sample Oates: 12/4/2017

-12/4/2017 MIXEDBLV Nuclide Activity 2 Sigma Error MOA Co-58 <2 30E+01 0 OOE+OO 2 30E+01 Fe-59 <4.92E+01 0 OOE+OO 4 92E+01 Co-60 <2 48E+01 OOOE+OO 2 48E+01 Zn-65 <5 31E+01 0 OOE+OO 5.31E+01 Zr-95 <4.55E+01 0 OOE+OO 4.55E+01 Nb-95 <2 87E+01 0 OOE+OO 2 87E+01 1-131 <3.96E+01 O.OOE+OO 3 96E+01 Cs-134 <2 62E+01 0 OOE+OO 2 62E+01 Cs-137 <2 84 E+01 0 OOE+OO 2 84E+01 Bala-1 40 <3.59E+01 O.OOE+OO 3.59E+0 1 Be-7 115E+03 2 65E+02 3.49E+02 K-40 4 79E+03 6.41E+02 4 77E+0 2 Sample Point 084 { INDICATOR

NNE @ 2.58 miles ) Sample ID: 432255 Sample Dates: 1/3/2017 -1/3/2017 MIXED8LV Nucllde Activity 2 Sigma Error MOA Mn-54 <2.31E+01 O.OOE+OO 2 31E+01 Co-58 <1.64E+01 O.OOE+OO 1.64E+01 Fe-59 <3 84E+01 O.OOE+OO 3 84E+01 Co-60 <3.20E+01 O.OOE+OO 3 20E+01 Zn-65 <3.1 4E+01 O.OOE+OO 3.14E+01 Zr-95 <4 3 0E+01 O.OOE+OO 4 30E+01 Nb-95 <2.77E+01 O.OOE+OO 2 77E+01 1-13 1 <3.7 8E+01 O.OOE+OO 3 78E+01 Cs-134 <2 88E+01 0 OOE+OO 2 88E+01 Cs-137 <2.22E+01 O.OOE+OO 2 22E+01 Bala-140 <2.35E+01 O.OOE+OO 2 35E+01 Be-7 3 38E+03 4 74E+0 2 2 63E+0 2 K-40 2.94E+03 5 56E+02 3 18E+0 2 Sample ID: 435150 Sample Dates: 21 6/2 017
2/6/2017 MIXEOBLV Nuclide Activity 2 S i gma Error MDA Mn-54 <3 OOE+01 OOOE+OO 3 OOE+01 Co-58 <2 08E+0 1 OOOE+OO 2 08E+01 Fe-59 <4 75E+01 OOOE+OO 4 75E+01 Co-60 <2 35E+01 OOO E+OO 2 35E+01 Zn-65 <6 01E+01 0 OOE+OO 6.0 1E+01 Z r-95 <4 98E+01 0 OOE+OO 4 98E+01 Nb-95 <2 14E+01 0 OOE+OO 2 14E+01 1-131 <2 09E+01 O O OE+OO 2 09E+01 C s-134 <3 15E+01 0 OOE+OO 3.15E+01 Cs-137 <2 91E+01 0 OOE+OO 2.91E+01 Bala-140 <3 01E+01 0 OOE+OO 3.01E+01 B e-7 3.47E+03 4.61E+0 2 2.23E+02 K-40 7 12E+02 2 83E+02 3 59E+02 Sample ID: 437630 Sample Dates: 316/2017.

3/6/2017 MIXEDBLV Nuclide Act i vity 2 Sigma Error MDA Mn-54 <3 28E+01 OOOE+OO 3 28E+01 Co-58 <3.66E+01 O.OOE+OO 3 66E+01 Fe-59 <6 07E+01 0 OOE+OO 6 07E+01 Co-60 <4 13E+01 O , OOE+OO 4 13E+01 Zn-65 <7.98E+01 O.OOE+OO 7 98E+01 Zr-95 <6 55E+01 0 OOE+OO 6 55E+01 Nb-95 <2.57E+01 0 OOE+OO 2 57E+01 1-131 <3 57E+01 0 OOE+OO 3 57E+01 Cs-134 <3.68E+01 0 OOE+OO 3 68E+01 Cs-137 <3 55E+01 0 OOE+OO 3 55E+01 B ala-1 40 <2 71E+01 0 OOE+OO 2 71E+01 B e-7 2 76E+03 4 95E+02 4 25E+02 K-40 3 57E+03 7 95E+02 7 21E+02 Sample ID: 440052 Sample Oates: 4/3/2017 -4/3/2017 MIXEDBLV Nuclide Act i vity 2 Sigma Error MDA Mn-54 <1 98E+01 O.OOE+OO 1 98E+0 1 Co-58 <2 62E+01 0 OOE+OO 2 62E+01 Fe-59 <2 53E+01 0 OOE+OO 2 53E+01 Co-60 <1 61E+01 0 OOE+OO 1.61E+01 Zn-65 <4 12E+01 0 OOE+OO 4 12E+01 Zr-95 <4 35E+0 1 O.OOE+OO 4 35E+01 Nb-95 <2 85E+01 0 OOE+OO 2 85E+01 Report Generated@ 3/21/2018 14: 30: 38 c (!ij) EnRad Laboratories Appendix E -Page 91 of 93 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Hun t e r sville , North Carolina 28078 OCONEE Radiological Environmental Monitoring Analysis Report -2017 (Appendix E) Media Type: VEGETATION Concentration (Activity): pCi/kg wet Sample Point 084 [INDICATOR* NNE@ 2.58 miles] Sample 10: 440052 Sample Dates: 4/3/2017

4/3/2017 MIXEOBLV Nuclide Activity 2 Sigma Error MOA 1-131 <2.65E+01 OOOE+OO 2 65E+01 Cs-134 <3.41E+01 0 OOE+OO 3.41E+01 Cs-137 <2.76E+01 0 OOE+OO 2 76E+01 Bala-140 <3.51E+01 OOOE+OO 3.51E+01 Be-7 3.65E+03 5 22E+02 3.24E+02 K-40 4.48E+03 7 46E+02 3.63E+02 Sample ID: 442366 Sample Oates: 5/1/2017.

5/1/2017 MIXEOBLV Nucllda Activity 2 Sigma Error MOA Mn-54 <3.09E+01 OOOE+OO 3.09E+01 Co-58 <3.11E+01 0 OOE+OO 3 11E+01 Fe-59 <6.31E+01 O.OOE+OO 6.31E+01 Co-60 <2.9SE+01 0 OOE+OO 2 9SE+01 Zn-65 <7.62E+01 O.OOE+OO 7.62E+01 Zt-95 <5.08E+01 0 OOE+OO 5.08E+01 Nb-95 <2.69E+01 O.OOE+OO 2 69E+01 1-131 <3.29E+01 O.OOE+OO 3.29E+01 Cs-134 <3.55E+01 O.OOE+OO 3.55E+01 Cs-137 <3.14E+01 O.OOE+OO 314E+01 Bala-140 <4.99E+01 O.OOE+OO 4.99E+01 Be-7 6.59E+02 2 26E+02 2.77E+02 K--40 2.84E+03 5.92E+02 4.45E+02 Sample 10: 445370 Sample Oates: 6/5/2017 -6/5/2017 MIXEOBLV Nuclide Activity 2 Sigma Error MOA Mn-54 <2 74E+01 O.OOE+OO 2 74E+01 Co-56 <2 43E+01 O.OOE+OO 2.43E+01 Fe-59 <4 75E+01 O.OOE+OO 4 75E+01 Co-60 <3 30E+01 O.OOE+OO 3 30E+01 Zn-65 <5 27E+01 O.OOE+OO 5 27E+01 Zr-95 <4 22E+01 O.OOE+OO 4 22E+01 Nb-95 <3 36E+01 O.OOE+OO 336E+01 1-131 <2 69E+01 0.00E+OO 2 69E+01 Cs-134 <4 25E+01 0 OOE+OO 4 25E+01 Cs-137 <2 66E+o1 OOOE+OO 2 66E+01 Bala-140 <3.67E+01 0 OOE+OO 3 67E+01 B e-7 5.34E+02 2 61E+02 3 69E+02 K--40 2.72E+03 5 86E+02 3 16E+0 2 Sample ID: 447852 Sample Oates: 7/3/2017

7/3/2017 MIXEDBLV Nuclide Activity 2 Sigma Error MOA Mn-54 <3 72E+01 0 OOE+OO 3 72E+01 Co-56 <2 98E+01 OOOE+OO 2 98E+01 Fe-59 <7.23E+01 0 OOE+OO 7 23E+01 Co-60 <2 65E+01 0 OOE+OO 2.65E+01 Zn-65 <3.68E+01 OOOE+OO 3.68E+01 Zr-95 <6.24E+01 OOOE+OO 6.24E+01 Nb-95 <3 53E+01 0 OOE+<l O 3.53E+0 1 1-131 <3.52E+01 0 OOE+OO 3.52E+01 Cs-134 <3 12E+01 O.OOE+OO 3.12E+01 Cs-137 <318E+01 0 OOE+OO 3 18E+01 Bala-140 <3.75E+01 0 OOE+OO 3.75E+01 Be-7 1 39E+03 3.56E+02 3.72E+02 K--40 3 22E+03 6 82E+02 3.62E+02 Sample ID: 450252 Sample Oates: 817/2017 -817/2017 MIXEOSLV Nuclide Activity 2 Sigma Error MOA Mn-54 <3 55E+01 0.00E+OO 355E+01 Co-58 <2 72E+01 OOOE+OO 2 72E+01 Fe-59 <5 84E+01 0 OOE+OO 5 B4E+01 Co-60 <1 95E+01 0.00E+OO 1 95E+01 Zn-65 <7 32E+01 0-00E+OO 7 32E+01 Zr-95 <4 72E+01 0 OOE+OO 4 72E+01 Nb-95 <J.43E+01 0 OOE+OO 3 43E+01 1-131 <2 70E+01 0 OOE+OO 2 70E+01 Cs-134 <3.24E+01 0 OOE+OO 3 24E+01 Cs-137 <3.20E+01 0 OOE+OO 3 20E+01 Bala-140 <2 58E+01 0 OOE+OO 2 58E+01 Be-7 8.18E+02 2 74E+02 3.30E+02 K-40 3 01E+03 649E+02 422E+02 Report Generated@

3/21/2018 14: 30 38 c fi_R]) EnRad Laboratories Append x E

Page 92 of 93 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078 OCONEE Radiological Environ mental Monitoring Analysis Report. 2017 (Appendix E) Media Type: VEGETATION Concentration (Act ivi ty): pCl/kg wet Sample Po in t 084 [ INDICATOR

-NNE@ 2.58 miles) Sample ID: 452410 Sample Datea: 9 1512017 -9 15/2 017 Sample ID: 455120 Sample Oates: 101212017 -10 12120 17 Sample 10: 462647 Sample Dates: 1116 12017 -111612017 Sample ID: 464744 Sample Dales: 12/412017 -121412017 Report Generated@ 3/21/2018 14: 30: 38 Duke Energy Annual R ep ort -Appendix E MIXEDB LV Nuclide Mn-54 Co-58 Fe-59 Co-60 Zn-65 Z r-95 N l>-95 1-131 Cs-134 Cs-137 Bala-140 B e-7 K-40 MIXEOBLV Nuclide Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr-95 Nb-95 1-131 Cs-134 Cs-137 Bala-140 Be-7 K-40 MIXEDBLV Nuclide Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr-95 Nb-95 1-1 31 Cs-134 Cs-137 Bala-140 Be-7 K-40 MIXEDBLV Nuclide Mn-54 Co-58 Fe-59 Co~ Zn-65 Zr-95 Nb-95 1-131 Cs-134 Cs-13 7 BaLa-140 Be-7 K-40 EnRad Laborato es 13339 Hagers Ferry Road Hunte rsville. North Carolina 28078 Activity <2 80E+01 <1 85E+01 <4 98E+01 <2 94E+01 <2 88E+01 <4 OOE+01 <2 71E+01 <2 92E+01 <3 14E+01 <2 49E+0 1 <3 60E+01 2 31E+03 2.13E+03 Activity <2 88E+01 <2 90E+01 <7.39E+01 <2 17E+01 <5 88E+01 <4.88E+01 <2.93E+01 <3 38E+01 <3.41E+01 3 94E+01 <3 10E+01 1 32E+03 3.76E+03 Activity <3 85E+01 <3 32E+01 <5 92E+01 <3 89E+01 <7 67E+01 <6 79E+01 <4 12E+01 <4 04E+01 <4 64E+01 <416E+01 <5.02E+01 5.23E+03 4.52E+03 Activity <3.04E+01 <3.02E+01 <5.41E+01 <3.16E+01 <616E+01 <5 73E+01 <2 97E+01 <4 68E+01 <3 07E+01 <3 30E+01 <4 77E+01 2 85E+03 5 14E+03 l 2 Sigma Error MDA O.OOE+OO 2 80E+01 0 OOE+OO 1.85E+01 0 OOE+OO 4 96E+01 O.OOE+OO 2 94E+01 O.OOE+OO 2.88E+01 OOOE+OO 4.00E+01 0.00E+OO 2 71E+01 O.OOE+OO 2.92E+01 O.OOE+OO 3.14E+01 O.OOE+OO 2 49E+01 O.OOE+OO 3 60E+01 3.99E+02 3 15 E+02 5 19E+02 424E+02 2 Sigma Error MDA O.OOE+OO 2 88E+01 O.OOE+OO 2 90E+01 O.OOE+OO 7 39E+01 0.00E+OO 2 17E+01 0 OOE+OO 5.8BE+01 0 OOE+OO 4 8BE+01 0 OOE+OO 2 93E+01 0 OOE+OO 3.38E+01 0 OOE+OO 3.41E+01 2 98E+01 4.60E+01 0 OOE+OO 3.10E+01 3 32E+02 3 94E+02 7 OOE+02 5.55E+02 2 Sigma Error MDA O.OOE+OO 3.85E+01 0 OOE+OO 3 32E+01 O.OOE+OO 5 92E+01 O.OOE+OO 3 B9E+0 1 O.OOE+OO 7 67E+01 O.OOE+OO 6 79E+0 1 O.OOE+OO 4 12E+0 1 O.OOE+OO 4 04E+01 O.OOE+OO 4 64E+01 0 OOE+OO 4 16E+01 O.OOE+OO 5 02E+01 6 78E+02 4.74E+02 7 92E+02 6 15E+02 2 Sigma Error MDA 0 OOE+OO 3.04E+01 O.OOE+OO 3.02E+01 0 OOE+OO 5.41E+0 1 OOOE+OO 3.16E+01 OOOE+OO 6.16E+0 1 0 OOE+OO 5 73E+01 0 OOE+OO 2.97E+01 0 OOE+OO 4.68E+01 0 OOE+OO 3 07E+0 1 O.OOE+OO 3 30E+01 0 OOE+OO 4 77E+01 6.73E+02 307E+02 1.11E+03 3 01 E+02 Appendix E -Page 93 of 9 3 APPENDIXF ERRATA TO PREVIOUS REPORTS Appendix F -P age 1 ----, I : APPENDIXF ERRATA TOTHE2017 AREOR Oconee AREOR: 2015, 2016 During the creation of the 2017 Oconee Land Use Census (LUC) map, it was determined the sector grid was off by 1.2 degrees. The 1.2 degree variance associated with the 2017 map indicated in the Oconee 2017 AREOR (Figure 3.9) was mitigated prior to generating the 2017 map. The 1.2 degree variance did not show a clear visual representation of the nearest residences on the map. The 1.2 degree variance did not cause the misidentification of the nearest residence in any sector , because the compass rose was used in the field to determine the proper sector. The 2015 and 2016 Oconee AREOR LUC maps did indicate the 1.2 degree variance. The land use census data table (Table 3.9) was not affected. The visual representation of the attributes closest to the sector lines were the only way these maps were. affected. The map vendor indicated the variance was attrib~table to the differences in some land elevations in the piedmont regions of North and South Carolina. The 1.2 degree variance was corrected on the 2015 and 2016 Oconee Land Use Census maps which are indicated below (NCR # 02163452). Appendix F P a g e 2 Oconee Nuclear Station 2015 Land Use Census Map Legend II' ONS Residence / / O NS Ra i lroads / N a vleqHwys NavleqStreets c::Jstate s Cl Counbes -NHOWalerbody

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't"l9fb lon is cortcled ,n ieu ol r,,S~ 1;1""*'9 0 0.5 1 2 Moles --P..,.-NCSP NA027 Ap pe n d i x F

P age 3 Oconee Nuclear Station 2016 Land Use Census Map Legend
ONS Residence

/VONS Ra1koads /'.../ NavteqHwys 'v Nav1eqS1ree1s

c:Jscotes Ocounties

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@@ Line 3: / Line 3: @@
 | issue date = 05/15/2018
 | title = 2017 Annual Radiological Environmental Operating Report (AREOR)
-| author name = Dills J R
+| author name = Dills J
 | author affiliation = Duke Energy Carolinas, LLC
 | addressee name =

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ONS-2018-025, 2017 Annual Radiological Environmental Operating Report (AREOR): Difference between revisions

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