Text

2016 Annual Radiological Environmental Operating Report
	ML17142A068
Person / Time
Site:	Oconee
Issue date:	05/15/2017
From:	Teresa Ray; Duke Energy Carolinas
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	ONS-2017-037
	Download: ML17142A068 (179)
	v • d • e

~-,DUKE Thomas D. Ray ' :

Vice President

~ ENERGY Oconee Nuclear Statio_n Duke Energy ON01 VP I 7800 Rochester Hwy Seneca, SC 29672 o: 864.873.5016

f. 864.873. 4208 Tom.Ray@duke-energy.com ONS-2017-037 May15,2017 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 2016 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 2016 Annual Radiological Environmental Operating Report. This report covers operation of Units 1, 2 and 3 during the 2016 calendar year.

Any questions concerning this report may be directed to Kay Brocklesby at 864-873-6661.

Sincerely,

~y])~

Vice President Oconee Nuclear Station Enclosure www.duke-energy.com

U.S. Nuclear Regulatory Commission May 15, 2017 Page2 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 i I

DUKE ENERGYft ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT DUKE ENERGY CORPORATION OCONEE NUCLEAR STATION Units 1, 2, and 3 2016

TABLE OF CONTENTS 1.0 Executive Summary 1-1 2.0 Introduction 2-1 2.1 Site Description and Sample Locations 2-1 2.2 Scope and Requirements of the REMP 2-1 2.3 Statistical and Calculational Methodology . 2-2 2.3. l Estimation of the Mean Value . 2-2 2.3.2 Lower Level of Detection and Minimum Detectable Activity 2-3 2.3 .3 Trend Identification 2-3 3.0 Interpretation of Results . 3-1 3.1 Airborne Radioiodine and Particulates 3-2 3.2 Drinking Water. 3-5 3.3 Surface Water . 3-7 3.4 Milk. 3-9 3.5 BroadleafVegetation 3-11 3.6 Fish . 3-13 3.7 Shoreline Sediment . 3-16 3.8 Direct Gamma Radiation 3-18 3.8.1 Environmental TLD. 3-18 3.8.2 ISFSI 3-19 3.9 Land Use Census 3-23 4.0 Evaluation of Dose 4-1 4.1 Dose from Environmental Measurements 4-1 4.2 Estimated Dose from Releases 4-1 4.3 Comparison of Doses 4-2 5.0 Quality Assurance 5-1 5.1 Sample Collection 5-1 5.2 Sample Analysis 5-I 5 .3 Dosimetry Analysis 5-1 5.4 Laboratory Equipment Quality Assurance 5-1 5.4.1 Daily Quality Control 5-1 5.4.2 Calibration Verification . 5-1 5.4.3 Batch Processing 5-1 5.5 Duke Energy Interlaboratmy Comparison Program 5-1 5.5.1 Duke Energy Interlaboratory Program 5-2 5.5.2 Ecke1i & Ziegler Analytics Cross Check Program 5-2 5.5.3 ERA Proficiency Testing . 5-3 5.6 lntercornparison Program . 5-4 5.7 TLD lntercomparison Program . 5-4 5.7.1 Nuclear Technology Services lntercomparison Program 5-4 Appendices Appendix A: Environmental Sampling & Analysis Procedures A-1 I. Change of Sampling Procedures. A-2 II. Description of Analysis Procedures A-2 III. Change of Analysis Procedures . A-3 IV. Sampling and Analysis Procedures A-3 A. I Airborne Pmiiculate and Radioiodine A-3

A.2 Drinking Water A-4 A.3 Surface Water . A-4 A.4 Milk A-4 A.5 BroadleafVegetation A-4 A.6 Fish A-5 A.7 Shoreline Sediment. A-5 A.8 Direct Gamma Radiation (TLD) A-5 A.9 Annual Land Use Census . A-5 V. Global Positioning System (GPS) Analysis. A-6 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 Unavailable Analyses. C-3 Appendix D: Analytical Deviations . D-1 Appendix E: RadioJogical Environmental Monitoring Program Results ., E-1 Appendix F: EtTata to Previous Reports

F-1 LIST OF FIGURES 2.1-1 Oconee Nuclear Station Sampling Locations Map (One Mile Radius) .. 2-4 2.1-2 Oconee Nuclear Station Sampling Locations Map (Ten Mile Radius) 2-5 3.1 Concentration of Gross Beta in Air Particulate 3-4 3.2 Concentration of Tritium in Drinking Water 3-5 3.3 Concentration of Tritium in Surface Water. 3-7 3.5 Concentration of Cs-13 7 in Broad leaf Vegetation 3-11 3.6-1 Concentration of Cs-137 in Fish 3-14 3.6-2 Concentration of Cs-134 in Fish 3-14 3.7 Concentration of Cs-13 7 in Shoreline Sediment . 3-16 3.8 Direct Gamma Radiation (TLD) Results 3-19 3.9 Oconee Nuclear Station 2016 Land Use Census Map 3-24 LIST OF TABLES 2.1-A Oconee Radiological Monitoring Program Sampling Locations 2-6 2.1-B Oconee Radiological Monitoring Program Sampling Locations (TLD Sites) 2-7 2.2-A Reporting Levels for Radioactivity Concentrations in Environmental Samples 2-8 2.2-B REMP Analysis Frequency 2-8 2.2-C Maximum Values for the A PRIORI Lower Limits of Detection 2-9 3.1-A Mean Concentration of Air Radioiodine (1-131) . 3-3 3.1-B Mean Concentration of Gross Beta in Air Particulate . 3-4 3.2 Mean Concentrations of Radionuclides in Drinking Water 3-6

.) ..) Mean Concentrations of Radionuclides in Surface Water 3-8 3.4 Mean Concentration of Radionuclides in Milk . 3-10 3.5 Mean Concentration of Radionuclides in Vegetation . 3-12 3.6 Mean Concentrations of Radionuclides in Fish . 3-15 3.7 Mean Concentrations ofRadionuclides in Shoreline Sediment 3-17 II

3.8-A Direct Gamma Radiation (TLD) Results 3-20 3.8-B Direct Gamma Radiation (TLD) Oconee 2016 Investigation Level 3-21 3.9 Oconee 2016 Land Use Census Results 3-23 4.1-A Oconee Nuclear Station 2016 Environmental and Effluent Dose Comparison 4-3 4.1-B Maximum Individual Dose for 2016 based on Environmental Measurements (1mem) for Oconee Nuclear Station 4-5 5.0-A Duke Energy Interlaboratory Comparison Program 5-5 5.0-B Eckert &. Ziegler Analytics Cross Check Program . 5-12 5.0-C Environmental Resource Associates (ERA) Proficiency Testing 5-15 5.0-D 2016 Environmental Dosimeter Cross-Check Results . 5-16 LIST OF ACRONYMS USED IN THIS TEXT (in alphabetical orde1~

AREOR Annual Radiological Environmental Operating Report ARERR Annual Radiological Effluent Release Report BW Biweekly c Control CR Condition Report (analogous to Nuclear Condition Report (NCR))

ERA Environmental Resource Associates EZA Eckert & Ziegler Analytics GEL General Engineering Laboratory GI-LL! Gastrointestinal - Lower Large Intestine OPS Global Positioning System

[ Indicator IR Inner Ring

!SFSI Indcpe'ndent Spent Fuel Storage Installation LLD Lower Limit of Detection LL! Low Level Iodine M Monthly MDA Minimum Detectable Activity mrcm Milli rem MWe Megawatt (electrical)

NIST National Institute of Standards and Technology NCR Nuclear Condition Report (analogous to Condition Report (CR))

NRC Nuclear Regulatory Commission ODCM Offsite Dose Calculation Manual ONS Oconee Nuclear Station OR Outer Ring pCi/kg picocurie per kilogram pCi/l picocurie per liter pCi/m3 picocurie per cubic meter Q Quarterly REMP Radiological Environmental Monitoring Program SA Semiannuallv Sl Special 1nterest SLCs Selected Licensee Commitments SM Semimonthly T. Body Total Body TECH SPECs Technical Specifications TLD Thermoluminescent Dosimeter

~tCi/ml microcuric per milliliter UFSAR Updated Final Safety Analysis Report w Weekly Ill

1.0 EXECUTIVE

SUMMARY

This Annual Radiological Environmental Operating Report describes the Oconee Nuclear Station Radiological Environmental Monitoring Program (REMP), and the program results for the calendar year 2016.

Included are the identification of sampling locations, descriptions of environmental sampling and analysis procedures, comparisons of present environmental radioactivity levels and pre-operational environmental data, comparisons of doses calculated from environmental measurements and effluent data, analysis 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 twenty-four samples were analyzed comprising 1,089 test results in orde~* to compile data for the 2016 report. Based on the, anntial land use census, the current number of sampling sites for Oconee Nuclear Station is sufficient.

Concentrations observed in the environment in 2016 for station related radionuclides were within the ranges of concentrations observed in the past. Inspection of data showed that radioactivity concentrations in drinking water, surface water, fish, and shoreline sediment are higher than the activities reported for samples collected at control locations. All positively 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 environment by plant operations. The total body dose estimated to the maximum exposed member of the public as calculated by environmental sampling data, excluding TLD results, was 5.43E-02 mrem for 2016. Background radiation dose in the United States 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). 1 It is therefore concluded that station operations has had no significant radiological impact on the health and safety of the public or the environment.

1 NCRP (2009). National Council on Radiation Protection and Measurements. loni::ing Radiation Exposure of the Population of the United States, NCRP Report No. 160 (National Council on Radiation Protection and Measurements, Bethesda, Maryland).

Section 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 1 license for operation was issued 2/611973. Unit 2 license for operation was issued 10/611973. Unit 3 license for operation was issued 7119/1974. An independent spent fuel storage installation is also located at the site.

Figures 2.1-1 and 2.1-2 are maps depicting the Thennoluminescent 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 i.I-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 REQUIREMENTS OF THE REMP An environmental monitoring program has been in effect at Oconee Nuclear Station since 1969, four years prior to operation of Unit 1 in 1973. The preoperational program provides data on the existing environmental radioactivity levels for the site and vicinity which may be used to dete1mine whether increases in environmental levels are attributable to the station. The operational program provides surveillance and backup supp01i of detailed effluent monitoring which is necessary to evaluate the significance, if any, of the contributions to the existing environmental radioactivity levels that result from station operation.

This monitoring program is based on NRC guidance as reflected in the Selected Licensee 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 "man-made" environmental radioactivity. The environmental monitoring program also verifies projected and anticipated radionuclide concentrations in the environment and related exposures from releases of radionuclides from Oconee Nuclear Station. This program satisfies the requirements of Section IV.B.2 of Appendix I to 10CFR50 and 10CFR72.44(d)(2) and provides surveillance of all appropriate critical exposure pathways to man and protects vital interests of the company, public, and state and federal agencies concerned with the environment. Repo1iing levels for radioactivity found in environmental samples are listed in Table 2.2-A. Table 2.2-B lists the REMP analysis and frequency schedule.

Section 2 - Page I

The Annual Land Use Census, required by Selected Licensee Conu11itments, is performed to ensure that changes in the use of areas at or beyond the site boundary are 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 comparison 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 10CFR50. 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 VALUE There was one (1) basic statistical calculation performed on the raw data resulting from the environmental sample analysis program. The calculation involved the determination of the mean value for the indicator and, the control samples for each sample medium.

The mean is a widely used statistic. This value was used in the reduction of the data generated by the sampling and analysis of the various media in the Radiological Environmental Monitoring Program. "Net activity (or concentration)" is the activity (or concentration) determined to be present in the sample. No "Minimum Detectable Activity", "Lower Limit of Detection", "Less Than Level", or negative activities or concentrations are included in the calculation of the mean. The following equation was used to estimate the mean:

i=l x

N Where:

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

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

Section 2 - Page 2

2.3.2 LOWER LEVEL OF DETECTION AND MINIMUM DETECTABLE ACTIVITY The Lower Level 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 radioacttve material exceeding background amounts. The .MDA is calculated using a sample background and may be thought of as an "actual" LLD for a particular sample measurement. Certain gross counting measurements display a calculated negative value, indicating background is greater than sample activity.

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

Visual inspection of tabular or graphical presentations of data (including preoperational) is used to determine if a trend exists. A decrease in a particular radionuclide's concentration in an environmental medium does not indicate that reactor operations are removing radioactivity from the environment but that reactor operations are not adding that radionuclide to the environment in quantities exceeding the preoperational level and that the nomrnl 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 enviromnental levels; therefore, a knowledge of the release of a radionuclide from the nuclear plant is necessary to completely interpret the trends, or lack of trends, determined from the envirom11ental 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.

Section 2 - Page 3

Figure 2.1-1 Oconee Nuclear Station Sampling Locations Map (One Mile Radius)

~I I Legend

TLD Locations

.a. All Other Locations t /'x/ ONS Railroads

/"'-., / ONS Roads 11.~ States Jll Counties

. . NHDWaterbody Approximate location offeatures shown 0

---mc======:::Jo_s 0.25 Miles Pro1ection NCSP NA027

- 089 ap generated 20 16 Section 2 - Page 4

Figure 2.1-2 Oconee Nuclear J Station Sampling Locations Map (Ten Mile Radi us)

Legend

TLD Locations

All Other Locations

,/\../ ONS Railroads NavteqHwys

~ i States L _J Counties NHDWaterbody Incorporated Areas Approunate location of features shown 0 2 3

1Miles Projection NCSP NAD27

(

Section 2 - Page 5

TABLE2.1-A OCONEE RADIOLOGICAL MONITORING PROGRAM SAMPLING LOCATIONS Table 2.*1-A Codes w Weeklv SM Semimonthly BW Bi Weekly Q Quarterly M Monthly SA Semiannually c Control I Indicator Site i\leasurc Air Rad.& Surfocc Drinking Shordinc Fish Milk Broal.llcaf Location Description* Partirnlate \Vatrr \Vat er Sediment Vegetation

Tvnc 060 I Greenville Water Intake Road (3.23 NE) M 060 c Greenville Wat.:r Intake Road (2.28 NE) SA 062 c Lake Keowee Hydro Intake (0.85 mi ENE) M Lake Hartwell Hwy 183 Bridge 063 I (0.80 mi ESE) f000.7] SA SA 063.l I Lake Hartwell Hwy 183 (0.79 mi E) M 064 c Seneca Municipal Water Supply(6.67 mi SSW) M f004.l J 066 I Anderson Municipal Water Supply (18.9 mi M SSE) f012] '

Lawrence Ramsey Bridge Hwy 27 067 I (4.34 mi SSE) f005.2] SA SA 068 c High Falls County Park ( 1.82 mi W) SA 071 c Clemson Dairy (10.2 mi SSE) [006.3] SM 077 I Skimmer Wall ( 1.00 mi SW) w M 078.1 I Recreation Site (0.53 mi WSW) w 079 I Keowee Dam (0.56 mi NE) w M 081 c Clemson Operations Center (9.33 mi SE) w M 084 I Sue Craig Road (2.58 mi NNE) \V M 085 I Lake Services I Building B9125 (0.88 mi NNW) w

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

- Control for Fish Only

[] Location Numbers pr~or to 1984 Section 2 - Page 6

TABLE2.1-B OCONEE RADIOLOCICAL MONITORING PROGRAM SAMPLING LOCATIONS (TLD SITES)

Table 2.1-8 Codes IR I Inner Ring I OR I Outer Ring c I Control I SI I Special Interest Site i\kasure Location* Distance Sector Site i\leasure Location* Distance Sector

Tv11e (miles) # Tv11e (miles) 020 IR Site Boundary 0. I6 N 044 OR HWY 130 at Little Ri\*cr Dam 3.96 s Tenninus of HWY 588 021 IR Site Boundaty 0.25 NNE 045 OR at Crooked Creek 4.78 SSW HWY 188 a1 022 IR Site Boundary 0.53 NE 046 OR Crooked Creek 4.61 SW 023 IR Site Boundary 0.93 ENE 047 OR New Hope Church, HWY 188 3.58 \VSW 024 IR Sile Boundary 0.81 E 048 OR JCTHWY 175& 188 3.64 w 025 IR Site Boundary 0.42 ESE 049 OR JCT llWY 201 & 92 3.60 WNW Stamp Creek Landing.

026 IR Site Boundary 0.34 SE 050 OR End of HWY92 3.53 NW HWY 128, 027 IR Site Boundary 0.49 SSE 051 OR I mile N OF !!WY 130 4.64 NNW DPC Branch Office Site, 028 IR Site Boundary 0.46 s 052 Sl Pickens 12.4 ENE 029 IR Site Boundary 0.56 SSW 053 SJ DPC Branch Office Site. Liberty I l.7 E 030 IR Site Bounda1y 0.42 SW 054 SI Post Otlice - HWY 93 Norris 8.60 ESE 031 JR Site Boundary 0.27 WSW 055 SI Clemson Meteorology Plot 9.27 SSE 076 JR Site Bounda1y O.I9 w 056 SJ Water Tower - Seneca 7.30 SSW 032 IR Site Boundary O.I9 \VNW 057 SI Oconee Memorial Hospital 8.42 SW 033 IR Site Boundary 0.21 WNW 058 c Branch Rd Substation, Walhalla 9.39 WSW 034 IR Site Boundary 0.22 NW 059 SI Tamassee Dar School 9.20 NW Skinm1er wall shared with air 035 IR Site Boundary 0.17 NNW 077 .. SI monitoring station l.00 SW ONS Recreation Sile shared 036 OR Mile Creek Landing 4.18 N 078.l" SI with air monitoring station 0.53 WSW 037 OR Keowee Church, HWY 327 4.85 NNE 081 c Clemson Operations Center 9.33 SE Convenience Matt, Lake Se1vices Bldg 9125 shared 038 OR JCT HWY 183 & 133 4.24 NE 085" SI with air monitoring location 0.88 NNW HWY 133, 1 mile East Lake Keowee Service Rd at 039 OR ofJCTHWY 183& 133 4.02 ENE 086" SI Boat Landing 0.83 NW 040 OR Microwave Tower, Six Mile 4.74 E 087"" SI End of Waterfall Rd l.33 WNW Doug Hollow Rd I Transmission 041 OR JCT HWY IOI & 133 4.25 ESE 088" SI Tower l.00 SSW Lawrence Chapel Church, Intersection 042 OR HWY 133 4.93 SE 089"" SI Hwy 130 & Keowce River Rd l. l 9 s HWY 291 at Crescent Resources, Keowee 043 OR Issaq ueena Park 4.09 SSE 090** SI River Rd at Beaver Dam 0.79 SE

GPS data reflect accuracy to w1thm 2-)- meters. GPS field measurements were taken as close as possible to the ttem of mterest.

- TLD location added to Oconee REMP, ODCM Revision 58 (NCR# 02035669).

Section 2 - Page 7

TABLE2.2-A REPORTING LEVELS FOR RADIOACTIVITY CONCENTRATIONS IN ENVIRONMENTAL SAMPLES Analysis Water Air Particulates Fish Milk Broadleaf (pCi/liter) or Gases (pCi/kg-wet) (pCi/litcr) Vegetation 3

(pCi/m ) (pCi/kg-wet) 1-1-3 20,0001"1 --- --- --- ---

Mn-54 1,000 --- 30,000 --- ---

Fe-59 400 --- 10,000 --- ---

Co-58 1,000 --- 30,000 --- ---

Co-60 300 --- 10,000 --- ---

Zn-65 300 --- 20,000 --- ---

Zr-Nb-95 400 --- --- --- ---

I-131 i"J 0.9 --- 3 100 Cs-134 30 10 1,000 60 1,000 Cs-137 50 20 2,000 70 2,000 Ba-La-140 200 --- --- 300 ---

(a) For drinking water samples only. This is 40CFR Part 141 value.

(b) If low-level I-131 analyses are performed.

TABLE2.2-B REMP ANALYSIS FREQUENCY Sample Analysis Gamma Tritium Low Level Gross TLD Medium Schedule Isotopic I-131 Beta Air Radioiodine Weekly x --- --- ---

Air Weekly --- --- --- x ---

Particulate Quarterly Composite x --- --- --- ---

Direct Radiation Quarterly --- --- --- --- x Surface Monthly x --- --- --- ---

Water Quarterly Composite --- x --- --- ---

Drinking Monthly x --- (a) x ---

Water Quarterly Composite --- x --- --- ---

Shoreline Sediment Semiannually x --- --- --- --- .

Milk Semimonthly x --- x --- ---

Fish Semiannually x --- --- --- ---

Broad leaf Vegetation Monthly x --- --- --- ---

(a) Low level I-131 analysis will be pe1iormed if abnormal releases occur which could reasonably result in> 1 pCi/litcr of 1-131 in d1inking water. An LLD of 1 pCi/liter will be required for this analysis.

Section 2 - Page 8 j

TABLE2.2-C MAXIMUM VALUES FOR THE A PRIORI LOWER LIMITS OF DETECTION Analysis Water Air Fish Milk Broad leaf Sediment (pCi/litcr) Particulates (pCi/kg-wet) (pCi/liter) Vegetation (pCi/kg-dry) or Gases (pCi/kg-wet)

(pCi/111 3 )

Gross Beta 4 0.01 --- --- --- ---

H-3 2000 --- --- --- --- ---

Mn-54 15 --- 130 --- --- ---

Fe-59 30 --- 260 --- --- ---

Co-58, 60 15 --- 130 --- --- ---

Zn-65 30 --- 260 --- --- ---

Zr-95 15 --- --- --- --- ---

Nb-95 15 --- --- --- --- ---

1-131 15(a) 0.07 --- 1 60 Cs-134 15 0.05 130 15 60 150 Cs-137 18 0.06 150 18 80 180 Ba-La-140 15 --- --- 15 --- ---

(a) LLD for low-level 1-131 analyses is I pCi/I iter if performed Section 2 - Page 9

3.0 INTERPRETATION OF RESULTS Review of 2016 REMP analysis results was perfonned to identify changes in environmental levels as a result of station operations. The review is summarized in this section. Data from 2016 was compared to preoperational and historical data. Sample data for some media is not directly comparable to preoperational and earlier operational sample results because of either significant changes in the analysis methods or changes in the reporting of the results. Summary tables containing 2016 information required by Technical Specification Administrative Control 5.6.2 are located in Appendix B. REMP results for 2016 are located in Appendix E.

Evaluation for significant trends was performed for the radionuclides that have required LLDs listed in Selected Licensee Co1mnitment 16.11.6. 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, I-131, Cs-134, Cs-137, Ba-140, and La-140. Drinking water gross 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: 2016.

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 100% action level.

The highest value reached during 2016 due to ONS operation was 1.84% for H-3 in a drinking water sample collected at location 066.

Changes in sample location, analytical technique, and presentation of results must be considered 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 activity 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 false-positive results.

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 2016.

Section 3 - Page l

3.1 AIRBORNE RADIOIODINE AND PARTICULATES In 2016, 312 radioiodine and particulate samples were analyzed, 260 from five indicator locations and 52 from the control location. Particulate samples were analyzed weekly for gross beta. A quarterly gamma analysis was perfom1ed on the qllarterly filter composite (by location).

Radioiodine samples received a weekly gamma analysis.

Western North Carolina wildfires created smoky conditions affecting some air monitoring equipment during 2016 reducing air flow due to filter loading. Air radioiodine and particulate samples collected during these conditions indicated reduced volume, but no sampling deviations or data anomalies were incmTed (NCR# 02080812, 02082178).

There was no detectable I-131 in air samples in 2016. Table 3.1-A gives the highest indicator location annual mean and control location annual mean for I-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 I-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 2016 due to ONS plant operations,. No gamma emitting particulates due to ONS plant operati9ns have been detected in indicator location samples since the change in gamma spectroscopy analysis systems in 19 8 7.

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 - Page 2

Table 3.1-A Mean Concentration of Air Radioiodinc (1-131)

Year Indicator Location (pCi/m 3 ) Control Location (pCi/m 3 )

Preoperational 1969-1972 O.OOEO O.OOEO Feb. 1973 - June 1973 O.OOEO O.OOEO July 1973 - Dec. 1973 O.OOEO O.OOEO Jan. 1974 - June 1974 O.OOEO O.OOEO July 1974 - Dec. 1974 2.60E-2 8.00E-3 Jan. 1975 - June I 975 8.65E-2 3.12E-2 July 1975 - Dec. 1975 l.13E-2 9.52E-3 1976 2.76E-2 2.18E-2 1977 3.60E-2 3.60E-2 1978 2.19E-l l.15E-l 1979 7.54E-3 4.75E-4 1980 3.07E-3 9.67E-4 1981 6.3 lE-3 5.39E-4 1982 2.87E-3 8.lOE-4 1983 l.48E-3 3.05E-4 1984 8.1 lE-4 -2.30E-5 1985 7.71E-4 4.54E-4 1986 5.02E-3 7.86E-3 1987(!) 4.29E-3 5.19E-3 1988 o*.ooE6 O.OOEO 1989 4.99E-4 O.OOEO 1990 O.OOEO O.OOEO 1991 O.OOEO O.OOEO 1992 O.OOEO O.OOEO 1993 O.OOEO O.OOEO 1994 I .03E-2 O.OOEO 1995 O.OOEO O.OOEO 1996 O.OOEO O.OOEO 1997 O.OOEO O.OOEO 1998 O.OOEO O.OOEO 1999 O.OOEO O.OOEO 2000 O.OOEO O.OOEO 2001 O.OOEO O.OOEO 2002 O.OOEO O.OOEO 2003 O.OOEO O.OOEO 2004 O.OOEO O.OOEO 2005 O.OOEO 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 (21 5.05E-2 4.13E-2 2012 O.OOEO O.OOEO 2013 O.OOEO O.OOEO 2014< 3l O.OOEO O.OOEO 2015 O.OOEO O.OOEO 2016 O.OOEO O.OOEO O.OOEO indicates no detectable measurements (I) 1987 - Gamma spectroscopy system change.

1979 - 1986 mean based on all net activity (2) 2011 concentration affected by Fukushima Daiichi (3) 2014- Gamma spectroscopy system change Section 3 - Page 3

Figure 3.1 pCi/m3 Concentration of Gross Beta in Air Particulate 4.SOOE-2 4.000E-2 3.SOOE-2 3.000E-2 I 2.SOOE-2 -

2.000E-2 l .SOOE-2 1.000E-2 I 5.000E-3 l 0.000E+O 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016

Indicator Location - . - control Location There is no reporting level f or gross beta in air partirnlate Table 3.1-B Mea n Concentration of G ross Beta in Air Particulate Monitoring Pe riod Indica tor Loca tion (pCi/m3 ) Control Location (pCi/m3 )

1996 3.87 E-2 3.69E-2 1997 2.87 E-2 2.92E-2 1998 2.47E-2 I .56E-2 1999 2.85E-2 2.23E-2 2000 2.3 8E-2 l.85E-2 2001 2.0SE-2 I .94E-2 2002 2.0l E-2 I .84E-2 2003 I .86E-2 I .82E-2 2004 I .92E-2 I .90E-2 2005 I .95E-2 1.9 1E-2 2006 2.09E-2 2.00 E-2 2007 2.3 1E-2 2. I3E-2 2008 2.08 E-2 2.04E-2 2009 I .82E-2 I .80E-2 20 10 2.02E-2 2.04E-2 20 11 2.06E-2 I .92E-2 20 12 2.63E-2 I .97E-2 20 13 I .96E-2 I .74E-2 20 14 2.1 IE-2 I .86E-2 20 15 2.13E-2 l.78E-2 201 6 2.37E-2 2. I7E-2 ec llon 3 - Page -I

3.2 DRINKING WATER Gross beta analysis and gamma spectroscopy were performed on 39 monthly drinking water samples. These samples were composited to form 12 quarterly period samples for Tritium analysis . 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 ann ual mean for gross beta results since the preoperational period. The indicator location had an average concentration of 1.44 pCi/liter in 20 16, and the control location had a concentration of 1.15 pCi/liter. For comparison purposes, the 2015 indicator mean was 2.34 pCi/liter. The table shows that 2016 gross beta levels in drinking water are lower than preoperational concentrations.

The dose for consumption of water was less than one mrem per year and there were no abnonnal releases exceeding 1 pCi/liter I-131 in 2016; therefore low-level iodine analysis is not required .

Tritium was detected in four of the twelve composite sampl es during 20 16. The 20 16 mean indicator location 066 concentration was 317 pCi/liter, which is 1.59% of the 20,000 pCi/l Tritium reporting level. Table 3.2 and Figure 3.2 show the highest indicator and control location amrnal means for Tritium since analysis was initiated early in the operational period. Tritium concentrati ons have decreased at both the indicator and control locations. The closure of the Clemson water plant in 1989 is one reason 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 20 16. Gamma spectroscopy analysis has not detected any gamma activity in the water supplies since 1988. K-40 observed in drinking water samples is a naturally occurring radionuclide.

Figure 3.2 Curren/ reporting level implemen!ed 1984 pCl/llter Concentration of Tritium in Drinking Water 5000 4500 4000 -

3500 3000 2500 2000 1500 1000 500 0

1974 1978 1983 1988 1993 1998 2003 2008 2013 lndicator Location ...._ Control Location - 2 0 % Reporting Level Section 3 - Page 5

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

Year Indicator Control Indicator Control Location Location Location Location Preoperational endin_g Jan. 1971 3.03 5.90 Analysis not required Preoperational ending Jan. 1973 3.58 4.94 Analysis not required Feb. 1973 - June 1973 Qualitative results reported Analysis not required June 1973 - Dec. 1973 7.15 21.78 Analysis not required Jan. 1974 - June 1974 3.13 6.98 Analysis not required July 1974 - Dec. 1974 2.24 2.02 525 330 Jan. 1975 - June 1975 1.98 1.59 600 300 July 1975 - Dec. 1975 2.01 l.22 2990 505 1976 2.38 2.00 2196 224 1977 2.70 2.30 1200 290 1978 2.56 2.17 1050 333 1979 1.83 1.36 576 235 1980 1.86 1.63 660 200 1981 1.98 1.88 830 127 1982 2.04 1.45 643 153 1983 1.85 1.54 937 220 1984 1.87 1.08 765 145 1985 2.14 1.16 ' 856 210 1986 1.91 1.04 1240 503 1987 2.00 1.20 815 680 1988 2.00 1.40 1570 0.00 1989 2.30 1.80 1350 559 1990 3.00 2.70 0.00 0.00 1991 1.80 I .40 558 0.00 1992 3.20 1.60 0.00 0.00 1993 2.10 1.90 0.00 0.00 1994 1.90 2.10 0.00 0.00 1995 5.10 2.90 248 0.00 1996 2.07 1.77 214 0.00 1997 2.52 2.23 194 0.00 1998 2.48 1.70 0.00 0.00 1999 1.73 1.49 185 0.00 2000 2.07 1.68 251 0.00 2001 1.75 1.29 390 0.00 2002 1.61 1.21 338 0.00 2003 1.5 I 1.05 266 0.00 2004 1.58 1.25 225 0.00 2005 1.28 1.37 377 0.00 2006 1.54 1.75 340 0.00 2007 1.58 1.08 402 0.00 2008 1.82 1.25 372 0.00 2009 1.37 1.19 415 0.00 2010 I. I 0 0.97 308 0.00 2011 I. 18 1.00 339 0.00 2012 1.40 0.92 322 0.00 *>

2013 1.57 1.1 I 325 0.00 2014 1.43 1.12 292 0.00 2015 2.34 1.46 325 0.00 2016 1.44 1.15 317 0.00 0.00 indicates no detectable measurements 1989 - Clemson water plant closes: nearest downstream plant is Anderson.

1979 - ! 986 mean based on all net activity results Section 3 - Page 6

3.3 SURFACE WATER Gamma spectroscopy was perfonned on 26 monthly surface water samples. These samples were composited to form eight quarterly samples for Tritium analysis. One indicator and one control location -v ere sampled . The indicator location is near the liquid effluent release point.

Tritium was detected in the four indicator location samples. The 20 16 average concentration was 4,285 pCi/liter. The indi idual samples ranged from 3,380 to 4,710 pCi/liter. For comparison purposes, the 2015 mean concentration was 7.730 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 2016 . o gamma emitting radionuclides attrib utable 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 ana lysis system in 1987. Visual inspection of the gamma spectroscopy tabular data covering the early operational period thro ugh 2016 did not reveal any increasing trends.

K-40 and Be-7 observed in surface water samples are naturally occurring radionucli des.

Figure 3.3 pCl/llter Concentration of Tritium in Surface Water 60000 50000 40000 30000 20000 10000 0

1969 1975 1980 1986 1992 1998 2004 2010 2016 Ind icator Locat ion _._ Control Location There is no reporting level f or Tritium in swface water ec llon 3 - Page 7

Table 3.3 Mean Concentrations of Radionudides in Surface Water Year Co-58 (pCi/l) Co-60 (pCi/I) Nb-95 (pCi/l) Cs-137 (pCi/I) H-3 pCi/I)

Preoperational 1969 Qualitative results repo1ted 4.86E2 Preoperational 1970 Qualitative results reported 5.94E2 Preoperational 1971 Qualitative results reported 4.0IE2 Preoperational 1972 Qualitative results reported 3.62E2 1973 Qualitative results reported O.OOEO 1974 O.OOEO l.32El O.OOEO l.60El l.99E3 Jan. 1975 - June 1975 O.OOEO O.OOEO O.OOEO O.OOEO l.56E4 July 1975 - Dec. 1975 O.OOEO l .34El O.OOEO O.OOEO 5.52E4 1976 l .OSE2 3.30El O.OOEO 3.50El 2.95E4 1977 2.60El I.SOE! O.OOEO 3.IOEI 2.90E3 1978 2.96E2 O.OOEO O.OOEO 2.22El 8.00E2 1979 l .33EO 2.60EO 1.78EO 2.82EO 4.37E3 1980 l.56EO 2.30EO l.22EO 5.40EO 4.93E3 1981 I.I OEO 6.IOE-1 l.70EO 3.90EO 7.2IE3 1982 6.14E-l l.99EO 2.29EO 4.85EO 6.13E3 1983 6.99E-l 3.02EO 3.91E-l 6.83E-1 8.40E3 1984 9.40E-l 6.30E-l 7.90E-l 4.83E-l 9.90E3 1985 2.15E-l 6.27E-l 4.95E-l 9.90E-l 1.05E4 1986 3.28EO l.23EO 1.14EO 3.07E-l l.26E4 198i 1) 5*_10Ei 3.40EO 4.00EO O.OOEO 7.08E3 1988 6.20EO 5.00EO 2.50EO 3.50EO l. IOE4 1989 5.30EO 3.00EO O.OOEO 3.40EO l.02E4 1990 l.70EO l.60EO O.OOEO O.OOEO l.03E4 1991 5.40EO O.OOEO O.OOEO O.OOEO 5.76E3 1992 2.50EO O.OOEO O.OOEO O.OOEO 6.22E3 1993 O.OOEO O.OOEO O.OOEO O.OOEO 8.62E3 1994 O.OOEO O.OOEO O.OOEO O.OOEO 5.75E3 1995 O.OOEO O.OOEO O.OOEO O.OOEO 6.65E3 1996 O.OOEO O.OOEO O.OOEO O.OOEO 4.54E3 1997 O.OOEO O.OOEO O.OOEO O.OOEO 5.50E3 1998 O.OOEO O.OOEO O.OOEO O.OOEO 3.35E3 1999 2.73El O.OOEO O.OOEO O.OOEO l. l3E4 2000 O.OOEO O.OOEO O.OOEO O.OOEO I .48E4 2001 O.OOEO O.OOEO O.OOEO O.OOEO 7.43E3 2002 O.OOEO O.OOEO O.OOEO O.OOEO l.OOE4 2003 O.OOEO O.OOEO O.OOEO O.OOEO 4.77E3 2004 O.OOEO O.OOEO O.OOEO O.OOEO 3.86E3 2005 O.OOEO O.OOEO O.OOEO 0.00EO 5.15E3 2006 O.OOEO O.OOEO O.OOEO O.OOEO 6.72E3 2007 O.OOEO O.OOEO O.OOEO O.OOEO 9.9IE3 2008 O.OOEO O.OOEO O.OOEO O.OOEO 9.43E3 2009 O.OOEO O.OOEO O.OOEO O.OOEO 4.68E3 2010 O.OOEO O.OOEO O.OOEO O.OOEO l.23E4 2011 O.OOEO O.OOEO O.OOEO O.OOEO 4.75E3 2012 O.OOEO O.OOEO O.OOEO O.OOEO 5.76E3 2013 O.OOEO O.OOEO O.OOEO O.OOEO 3.68E3 2014( 2 ) O.OOEO O.OOEO O.OOEO O.OOEO 3.49E3 2015 O.OOEO O.OOEO O.OOEO O.OOEO 7.73E3 2016 O.OOEO O.OOEO O.OOEO O.OOEO 4.29E3 O.OOEO indicates no detectable measurements ( l) 1987 - Gamma spectroscopy system change l 979-1986 mean based on all net activity results (2) 2014 - Gamma spectroscopy system change Section 3 - Page 8

3.4 MILK Gamma spectroscopy and low level iodine analysis was performed on 26 milk samples collected from the control location in 2016. No indicator dairies were sampled during 2016.

A milk animal was identified by the 2016 land use census in the E sector at 3.27 miles and appears on Figure 3.9, but the location cannot supply sufficient milk to participate in the sampling program (NCR # 02045091). No indicator dairies suitable for REMP sampling purposes were identified by the census.

There were no gamma emitting radionuclides due to ONS plant operations identified in milk samples in 2016. Cs-13 7 is the only radionuclide, other than naturally occurring, repo1ied 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-13 7 since the preoperational period. The table shows similar concentrations for both indicator and control locations.

K-40 observed in milk samples is a naturally occurring radionuclide.

Section 3 - Page 9

Table 3.4 Mean Concentration of Radionuclides in Milk Year Cs-137 Indicator (pCi/I) Cs-137 Control (pCi/I)

Preoperational 1.57El l.46El Feb. I 973 - June 1973 Qualitative results reported Qualitative results reported July 1973 - Dec. 1973 5.80EO Qualitative results reported Jan. 1974-June 1974 5.30EO O.OOEO July I 974 - Dec. 1974 1.l lEl O.OOEO Jan. 1975 - June I 975 1.5 I EI 9.45EO July 1975 - Dec. 1975 O.OOEO O.OOEO 1976 l.80EI 7.47EO 1977 O.OOEO O.OOEO 1978 l.33El I.33El 1979 7.25EO 2.52EO 1980 3.58EO 2.63EO 1981 5.52EO 5.51EO 1982 2.71EO 3.25EO 1983 5.04EO -4.27E-1 1984 2.30EO 2.58EO 1985 2.38EO l.3IEO 1986 2.92EO 2.97EO 198i 1> 4.90EO 4.90EO 1988 3.90EO 3.20EO 1989 4.70EO 2.90EO 1990 6.40EO O.OOEO 1991 5.00EO O.OOEO 1992 6.60EO O.OOEO 1993 O.OOEO O.OOEO 1994 O.OOEO l.80EO 1995 2.30EO 2.00EO 1996 O.OOEO 4.IOEO 1997 O.OOEO O.OOEO 1998 O.OOEO O.OOEO 1999 O.OOEO O.OOEO 2000 O.OOEO O.OOEO 2001 O.OOEO O.OOEO 2002 O.OOEO 0.00EO 2003 O.OOEO O.OOEO 2004 O.OOEO O.OOEO 2005 O.OOEO O.OOEO 2006 No Indicator Location O.OOEO 2007 No Indicator Location O.OOEO 2008 No Indicator Location O.OOEO 2009 No Indicator Location O.OOEO 2010 No Indicator Location O.OOEO 201 l No Indicator Location O.OOEO 2012 No Indicator Location O.OOEO 2013 No Indicator Location O.OOEO 2014( 2 ) No Indicator Location O.OOEO 2015 No Indicator Location O.OOEO 2016 No Indicator Location O.OOEO O.OOEO indicates no detectable measurements (I) 1987 - Gamma spectroscopy system change 1979 - 1986 mean based on all net activity results (2) 2014- Gamma spectroscopy system change The Oconee milk program was updated to align with NUREG-1301 during 2005 (NCR# 01753418). Locatiol) 071 was designated as the new control site effective with the 7/12/2005 sampling. No indicator dairies suitable for REMP sampling purposes were identified by the 2016 land use census (NCR# 02045091).

Section 3 - Page l 0

3.5 BROADLEAF VEGETATION Gamma spectroscopy was performed on 48 broad leaf vegetation samples during 20 16. Three indicator locations and one control location were sampled . There were no ganmrn emitting radionucl ides attributable to 0 S station operation identified in vegetation samples in 2016.

Cs- 13 7 is the only radionuclide, other than naturally occurring, reported in vegetation samples 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-13 7.

It is not unusual for Cs-I 37 to be present in vegetation. It is a constituent of nuclear weapons test fallo ut and nuc lear plant accidents and has been obse rved 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. Visual 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 pCl/k8 Concentration of Cs-137 in Broadleaf Vegetation 2500 2000 1500

1000 500 0

1974 1978 1983 1988 1993 1998 2003 2008 2013 Indicator Location -.-- Control Location - Reporting Level 20 11 concentration affected b) Fukushima Daiichi Secti on 3 - Page I I

Table 3.5 Mean Concentration of.Radionuclides in Vegetation Year Cs- 137 Indicator (pCi/kg) Cs-137 Control (pCi/kg)

July 1974 - Dec. 1974 l.54 E3 O.OOEO Jan. 1975 - June 1975 1. 55E3 l .59E3 July 1975 - Dec. 1975 O.OOEO O.OOEO 1976 O.OOEO O.OOEO 1977 O.OO EO 7.90E2 1978 l.19 E2 8. 19EI 1979 5.04EI 2.96EI 1980 2.80E I l.55E I 1981 2.99E I 2.60E I 1982 2.42EI 2.62E I 1983 7.44EO 5.35E- 1 1984 l .37E I 4.74E2t 1985 l.62 E I 2.20E2 1986 3.28EI 3. 12E2 1987()) 2.70E I 4.20E I 1988 2.40E I 7.50El 1989 O.OOEO l .08E2 1990 2.73E2 1.74E2 1991 2.20E I I .45E2 1992 O.OOEO I .46E2

' 1993 O.OOEO ' 1.49E2 1994 O.OOEO 1.06E2 1995 4.30EI 1.58E2 1996 3.79E I l.8 3E2 1997 4.73EI l.35E2 1998 7.28EI 1.61 E2tt 1999 1.34E2 O.OOEOttt 2000 1.06E2 O.OOEO 200 1 3. 19EI O.OOEO 2002 8.44E I O.OO EO 2003 O.OO EO O.OOEO 2004 O.OOEO 5.96EI 2005 4.5 1EI 4.1 IE I 2006 l.77 E I O.OOEO 2007 O.OOEO O.OOEO 2008 O.OOEO O.OOEO 2009 O.OO EO O.OOEO 20 10 O.OOEO O.OOEO 201 1 6.68E I tttt 3.35E ltttt 20 12 O.OOEO O.OOEO 20 13 2.57EI O.OOEO 2014<2 > O.OOEO O.OOEO 20 15 O.OOEO O.OOEO 20 16 O.OO EO O.OOEO O.OOEO 111d1cates no detec table measurements t Cont ro l locat1 on changed to 073 111 1984 Qualitati ve results reported prior to 1974 tt Contro l location 081 added in 1998 1979 - 1986 mean based on all net activity t t t Co ntrol location 073 removed in 1999

( I) 1987 - Gamma spectroscopy system change tttt 20 11 concentration affected by Fukushima Daiichi (2) 20 14 - Gamma spec troscop~ system change Section 3 - Page 12

3.6 FISH In 20 16, gamma spectroscopy was performed on 12 fish samples. Two downstream indicator locations and one control location were sampled. Cs-13 7 was identified in three of the eight indicator location samples. Cs-13 7 was detected in one of the four control location samples at a mean concentration of 13 .1 pCi/kg. The highest average indicator concentration for Cs-137 was 27.4 pCi/kg (1.37 % ofreporting level).

Figures 3.6-1 and 3.6-2 are graphs displaying the annua l 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 radionucl ides detected in 2016. Also included in the table are radionucl ides that have been identified in thi~ 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.

Secti on 3 - Page 13

Figure 3.6~1 pCl/lcg Concentration of Cs-137 in Fish 2500 2000 1500 1000 500 1970 1975 1979 1984 1989 1994 1999 2004 2009 2014

Indicator Location --- Control Location - Reporting Level Figure 3.6-2 pCl/lcg Concentration of Cs-134 in Fish 700 000 500 400 300 200 100 0

1970 1975 1979 1984 1989 1994 1999 2004 2009 2014

Indicator Location --- Control Location - 50% Reporting Level Current reporting levels implemented 19 ./

Sec ti on 3 - Page 14

Table 3.6 Mean Concentrations of Radionuclides in Fish Year Co-58 (pCi/kg) Co-60 (1>Ci/k2) Cs-134 (pCi/k2) Cs-13 7 ( pCi/k2)

Preop ending Jan.197 1 O.OOEO O.OOEO O.OOEO I .46E2 Preop end ing Jan.1973 O.OOEO O.OOEO O.OOEO I .66E2 Feb. 1973 - June 1973 Qualitat ive results reported-no significant measurements above background Ju ly 1973 - Dec. 1973 O.OOEO O.OOEO O.OOEO l.89E2 Jan . 1974 - June 1974 O.OOEO O.OOEO 0.00EO 2.47EI Ju ly 1974 - Dec. 1974 O.OOEO O.OOEO O.OOEO 4.85E I Jan . 1975-June 1975 O.OOEO O.OOEO 3.8 1EI I .05E2 July 1975 - Dec. 1975 8.50E I O.OOEO 7.00EI 3.13E2 1976 5.70EI 1. 14E2 7.73E I 1.66E2 1977 O.OOEO O.OOEO 1.80E2 3.60E2 1978 3.27E2 O.OOEO 3.3 IE2 O.OOEO 1979 l.91EO l.56EI 9.26E I 3.88E2 1980 l.45 E I l.90E I l.IOE2 3.99E2 198 1 2.25EI l.49EI I .40E2 4.5 IE2 1982 9.83 E-1 8.03EO l.17E2 2.94E2 1983 3.35E I 4.53EO l .24E2 3.32E2 1984 l.2 1E2 6.23E I 3.87E2 1.04E3 1985 J.62E I I. IOE I 7.93E I 2.85E2 1986 9.56E I 2.59E l 2.57E2 7.36E2 198i 1> l.63E2 6.30E l 9.80E I 3.93E2 1988 9.60EI O.OOEO 7.20E I 2.60E2 1989 4.30E I I.SOE I 8.60E I 3.36E2 1990 l.50E I O.OOEO 4.80E I l.1 9E2 199 1 4.59E I O.OOEO l.25E2 l.94E2 1992 6. IOEI O.OOEO 4.80El I .36E2 1993 O.OOEO O.OOEO 2. IOEI l. IOE2 1994 O.OOEO O.OOEO 2.80E I I .05E2 1995 O.OOEO O.OOEO 3. IOE I 9.20E I 1996 O.OOEO O.OOEO 4.49E I l.25E2 1997 O.OOEO O.OOEO O.OOEO l.1 8E2 1998 O.OOEO O.OOEO O.OOEO 5.79E I 1999 O.OOEO O.OOEO O.OOEO I .04E2 2000 O.OOEO O.OOEO O.OOEO 7.54E I 200 1 l.72EI O.OOEO O.OOEO 9.92E I 2002 O.OOEO O.OOEO O.OOEO 9.37E I 2003 5.02 E I O.OOEO O.OOEO 6.04E l 2004 O.OOEO O.OOEO O.OOEO 5.29E I 2005 O.OOEO O.OOEO O.OOEO 5.1 4E I 2006 O.OOEO O.OOEO O.OOEO 5.58E l 2007 O.OOEO O.OOEO O.OOEO 4. IOE I 2008 O.OOEO O.OOEO O.OOEO 3. 13E I 2009 9.0I EO O.OOEO O.OOEO 2.68E I 20 10 O.OOEO O.OOEO O.OOEO 2.69E I 2011 O.OOEO O.OOEO O.OOEO 3.53E I 20 12 l.23E2 3.6 1EI O.OOEO 4.32EI 2013 O.OOEO O.OOEO O.OOEO 2.44E I 20 1412) O.OOEO O.OOEO O.OOEO 1.40E I 2015 O.OOEO O.OOEO O.OOEO l.94E I 20 16 O.OO EO O.OOEO O.OOEO 2.74EI O.OOEO indicates no detectable measurements 1979 - 1986 mean based on all net activity

( I ) 1987 - Gamma spectroscopy sys tem change (2) 20 14 -Gamma spectra copy system change Secti on 3 - Page 15

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.

Cs-13 7 was identified in two of the four indicator location samp les. Cs-13 7 was not identified in the control location samples. The highest 20 I 6 individual sample Cs-137 concentration v as 254 pCi/kg. Table 3.7 lists the highest indicator location annual means since shoreline sedi ment 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-1 37 is a contributor to the calculated dose from liquid effluents from shoreline sediment. o trends are apparent.

K-40 and Be-7 observed in shoreline samples are naturally occurring radionuclides.

Figur.e 3.7 pCl/kg Concentration of Cs-137 in Shoreline Sediment 1000 900 800 700 600 500 400 300 200 100 0

1984 1988 1992 1996 2000 2004 2008 2012 2016

Indicator location 063 -.- Indicator location 067 _.. Control location 068 Th ere are 110 reporling levels f or shoreline sedim enl Secti on 3 - Page 16

Table 3. 7 Mean Concentrations of Rad ionuclides in Shorelin e Sedim ent (pCi/kg)

Year Mn-54 Co-58 Co-60 Zn-65 Cs-134 Cs-137 Ai?;-1 lOm Sb-125 1984 l. IOE I l.09EI l.l 9E l O.OOEO 7.77El 5. 16E t O.OOEO O.OOEO 1985 9.39EO l.27EO 4.79EO O.OOEO 7.63EI 9.47E I O.OOEO O.OOEO 1986 2.24E I l.62E I 2.50Et O.OOEO 1.41 E2 7. 12E2 O.OOEO O.OOEO 1987(!) 5.40E I 4.70E2 5.07E2 O.OOEO l. OIE2 6.22E2 3.46E2 O.OOEO 1988 3.30E I l.20E2 l .87E2 6.70El 6.60E1 7.59E2 1.62E2 3.67E2 1989 2.30E I l.24 E2 l. 96E2 O.OOEO 5.40E I 8.48E2 5.50E l l.86E2 1990 3.40E l 8.00 EI 2.59E2 O.OOEO 4.50El 5.36E2 1.7 1E2 9.00E I 199 1 3.26E1 5.60E I 8.57El O.OOEO 6.9 1E I l.24E2 1. IOE2 l. 78E2 1992 8.79EI l.79 E2 l. I 2E2 O.OO EO 5.60El 3.3 1E2 l .69E2 2.08E2 1993 8.20E l 8.20E l 6.50E I O.OOEO 3.20EI 1.36E2 5.63E I I. I I E2 1994 5.30E I 7.00E I I .49E2 O.OOEO 6.70E l 2.38E2 l .04E2 l. 29E2 1995 t .43E2 3.90El 2.40E I O.OOEO I. JOEi 5.20E l O.OOEO O.OOEO 1996 O.OOEO 5. IOEI O.OOEO O.OOEO l.98El l. 19E2 O.OOEO O.OOEO 1997 O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO l.06E2 O.OOEO O.OOEO 1998 O.OOEO O.OOEO O.OOEO O.OOEO 0-.00EO l.Ot E2 O.OOEO O.OOEO 1999 6.96E I O.OOEO O.OOEO O.OOEO O.OOEO 7.38E t O.OOEO O.OOEO 2000 O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO 8.54E l O.OOEO O.OOEO 200 1 O.OOEO 2. IOE t O.OOEO O.OOEO O.OOEO t.20E2 O.OOEO O.OOEO 2002 O.OO EO O.OOEO O.OO EO O.OOEO O.OOEO 6.96E t O.OOEO O.OOEO 2003 O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO l. 93E2 O.OOEO O.OOEO 2004 8.54E t O.OOEO O.OO EO O.OOEO O.OOEO 9.56E t O.OO EO O. OOEO 2005 2.00E2 O.OOEO O.OOEO O.OOEO O.OOEO 6.53E t O.OOEO O.OOEO 2006 O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO 5.0 tE t O.OO EO O.OOEO 2007 O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO 2.97E2 O.OOEO O.OOEO 2008 O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO t.7 8E2 O.OOEO O. OOEO 2009 O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO 6.97E t O.OOEO O.OOEO 20 10 O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO 1.l 5E2 O.OOEO O.OOEO 20 1 t O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO 6.83E t O. OOEO O.OOEO 20 12 O.OOEO O.OOEO O.OOEO O.OO EO O.OOEO 6.35E l O.OOEO O.OOEO 2013 O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO 4.37E t O.OOEO O.OOEO 2014<2 > O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO 2. t !E t 0.00EO O.OOEO 20 15 O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO 2.24E t O.OOEO O. OOEO 20 16 O.OOEO O.OOEO O.OOEO O.OOEO O.OOEO t .36E2 O.OOEO O.OOEO O.OOEO indi cates no detectab le measurements 1984 - 1986 mean based on all net activity

( I) 1987 - Gamma spectroscop} sys tem change (2) 20 14 - Garnma spectru copy S)slem change Section 3 - Page I 7

3.8 DIRECT GAMMA RADIATION 3.8.1 ENVIRONMENTAL TLD Oconee is licensed with an exclusion area boundary defined by UFSAR Section 2.1.1.2 as a 1 mile radius from station center. This is the same boundary established for determining radioactive effluent release limits. No pe1manent 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 a "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 20 16, 199 total TLDs were analyzed, 191 at indicator locations and 8 at control locations. TLDs are co llected and analyzed quarterly . Transit and laboratory background dose is determined and subtracted from gross field readings as required by ANSI N545-1975. Based on Appendix B TLD data, the highest annual total dose was 106 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 control locations.

Comparing data from the 20 16 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 effl uents 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 20 12. Quarterly and annual dose for 20 16 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 2016, 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.

Section 3 - Page 18

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 ISFSI 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 effl uents 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 1 mile exclusion boundary. In addition, dose rates at the ISFSI resti~icted 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 598 mrem per standard quarter. This is consistent with previous measurements.

Figure 3.8 mrem/year Direct Gamma Radiation (TLD} Results 250 200 150 100 so 0

1984 1988 1992 1996 2000 2004 2012 2016

-k- lnnerRing -e-- outer Ring __._ Control There is no reporting level for Direct Radiation (TLD)

Section 3 - Page 19

Table 3.8-A Direct Gamma Radiation (TLD) Results Inner Ring Average Outer Ring Avera ge Control Average Year (mrem/yr) (mrcm/yr) (mrcm/yr)

Preoperational 1.07 E2 l. 18 E2 I .42E2 1984 7.54E I 7.96E I l.05E2 1985 l.11 E2 l. I 5E2 I .49E2 1986 9.90E 1 l.O IE2 l .43E2 1987 8.0IE I 8.44E I 9.91 E I 1988 6.87E I 7.47 E I l .07E2 1989 6.05EI 5.86E I 8.49E I 1990 4.96E I 4.82E I 6.66E I 199 1 5.8 IEI 6. 18 E I 8.36E I 1992 7.24E I 6.95E I 8.74E I 1993 7. 1 IE I 7.66E l 8.84E l 1994 8.25E l 9.00E I l .06E2 1995 8.89E I 9.66E l l .25E2 1996 6.5 1E I 7.44EI 9.60E I 1997 6.92E I 7.96E I 9.93E I 1998 6.81EI 7.68E I l.12 E2 1999 7.08 E l 7.84E l 9.88E1 2000 7.24E I 8.03E I l.OQE2 2001 6.99E l 7.83 E1 9.71E l 2002 7.28E I 8. 1 IE I l.03E2 2003 7.36E I 8.23E l l.03E2 2004 7.6 1E l 8.3 1E I l .05E2 2005 7.54E I 8.46E I 9.95EI 2006 7.79El 8.57E l l .04E2 2007 7.70 E1 8.55E I l.03E2 2008 8.04EI 9.03 E l l .05E2 2009 8.08E I 8.98E I l .06E2 2010 7.94E l 8.85E l 9.77£ 1 2011 7.96E I 8.9 1E I l.05E2 20 12 7.89E I 8.79E l l.05E2 20 13 7.83EI 8.84EI l .06E2 20 14 7.58E I 8.46 El l .05E2 20 15 7.48E I 8.67E I l.04E2 20 16 7.59E l 8.65E l l .06E2 ect1on 3 - Page 20

Table 3.8-B Direct Gamma Radiation (TLD) Oconee 2016 Investigation Level r-- Oconee 2016 MDDo: 7 - -r---- -----6co11ee:fo 16 MbbA: 11 I Qu a rter ly (mrcm) I A nnu al(mrem )

Lora tion nQ 1\1 0 Q I l\I QQ2 i\ l oQJ MQQ.t LQQ I LQQ2 l 'QQ3 l 'QQ.t BA i\ I,.' LA 20 18.9 20.1 19.7 16.2 19.2 ND ND ND ND 75 .7 75 .2 ND 21 14 .0 14.6 13.5 12.0 13.8 ND ND ND ND 56 .9 53 .9 ND 22 21.8 23 .9 2 1. 5 18.9 24 .0 ND ND ND ND 89.7 88.4 ND 23 21.9 22.4 2 1.l 19.7 25 .0 ND ND ND ND 87 .8 88 .2 ND 2-t 22 .8 25 .7 26.9 23 .9 29.5 ND ND ND ND 98 .6 106.0 ND 25 17. 1 18.9 19.0 15 . 1 18.7 ND ND ND ND 72.9 71.7 ND 26 16.5 18.3 16.4 14.3 15. 1 ND ND ND ND 67.2 64 .2 ND 27 19.2 20.0 17.8 16.8 19.3 ND ND ND ND 78. 1 73 .8 ND 28 17.0 17.9 16. 1 14.S 16.4 ND ND ND ND 68 3 64 .9 ND 29 15.7 16. 1 16.0 12 .9 18.8 ND ND ND ND 63 3 63 .7 ND 30 17 0 19.2 18.2 IH 17.6 ND ND ND ND 70 6 69.9 ND 31 16.4 18.3 15.9 14.3 16.6 ND ND ND ND 65 7 65 .2 ND 32 22.9 22.0 18.4 16.5 19.7 ND ND ND ND 94.5 76.7 ND 33 19.S 19.6 16.2 14.4 17. 1 ND ND ND ND 77.9 67.3 ND 34 2 1. 5 20.0 18.6 15.2 17.7 ND ND ND ND 86.0 71. 5 ND 35 22.9 25.7 23.3 19.9 23 .2 ND ND ND ND 93.3 92.0 ND 36 26.5 28.4 26.2 22.3 26.8 ND ND ND ND 105 . 1 103 .7 ND 37 20.4 19.3 20.3 16.4 19.0 ND ND ND ND 82 0 75 .1 ND 38 2 1.9 24.7 22.3 19 8 21 4 ND ND ND ND 87 5 88.2 ND 39 24.2 25.4 24.4 22.9 23 .9 ND ND ND ND 962 96.6 ND 40 23 .7 29.0 27.3 22 .5 25 .8 ND ND ND ND IOI. I 104.6 ND 41 17.3 18.9 16.7 14.3 17. 1 ND ND ND ND 69. 1 67.0 ND

.t2 25 .0 26.4 28.4 23 .0 23 .9 ND ND ND ND 102.2 101.7 ND 43 23 .8 25.4 24. 1 212 24.9 ND ND ND ND 95 .3 95 .6 ND

.t4 18.3 20.0 18.5 17.1 18.4 ND ND ND ND 80.0 7.J I ND

-'=' 17 .0 16.9 17.6 14.9 18.4 ND ND ND ND 67 9 67 .8 ND 46 2 1.5 22.5 24.7 19.8 2 1. 5 ND ND ND ND 9 1. 8 88.4 ND

.t7 22.4 24 .2 2 1.9 18.3 22 .5 ND ND ND ND 9 1.l 87.0 ND

.t8 25.3 26.8 25 .2 21.3 27.5 ND ND ND ND 10 1.3 100.7 ND 49 20.7 2 1.9 20.5 18.5 23 .8 ND ND ND ND 82.6 84.6 ND so 17.7 19.6 18.3 15.5 20.3 ND ND ND ND 70.9 73 .7 ND 51 19.0 18.9 19.4 17.3 19.0 ND ND ND ND 76.2 74 .6 ND 52 22 .9 25 .5 23 .8 18.5 23 .7 ND ND ND ND 9.J.8 91.5 ND 53 25 .1 27.9 25 .1 19.9 24 .7 ND ND ND ND 102.3 97 .6 ND 5-t 18.5 20.2 18 4 14.S 17.5 ND ND ND ND 76.5 70.7 ND 55 15.5 17. 1 17.0 13.3 15.2 ND ND ND ND 65 .1 62 .6 ND 56 22.8 25 .7 23 9 2 1.0 25 .5 ND ND ND ND 91.8 96.0 ND 57 22.4 26.7 23 .2 2 1.S 23 .8 ND ND ND ND 93 6 95 .2 ND 58 29.3 34. 1 30.3 26.8 31.3 ND ND ND ND 11 9.7 122 5 ND 59 24 .1 25 .8 24 .5 --- 28 .6 ND ND ND ND 98 .5 105.3 ND 76 20.8 24 . 1 22.8 21.0 24.4 ND ND ND ND 89 .0 92.3 ND 81 2 1.9 24 .5 22.6 19.7 2 1. 8 ND ND ND ND 9 1.l 88.S ND

Ma determined by normalizing avai lab le quarterl y data to 4 full quarters

--- indicates no data resulting from missing TLD. erroneous TLD reading. or omitted aner investigation "0 1<

Eight ind ica tor location TLDs [077, 078 I. 085 , 086. 087. 088. 089. 090 1 were added to the Oconee REMP with the Oconee ODCM Revision 58 (NCR # 02035669) The eight TLD locations are s~hed ul ed to be inc luded in Table 3 8-B with the 20 17 anal) sis Note : Data ma) be omitted after investigation co nsidering the fo ll o\1 ing* ( I) Other TLD locations* data from up\1ind, down wind, and adjacent sectors (2) Rcvie\1 of documentation on location's characteristics. geography. topograph) . etc. (3) Comparison with o th ~r radiological data (i.e gaseous efflue nt releases. direct radiation reports. surveys. dose calculations. Area TLDs, etc).

Section 3 - Page 2 1

Table 3.8-B definition of terms MDD0 = minim um different ial dose. qu arterl y, 3 times 90'" perce ntil e s0 determined from analys is in mrem MDDA= minimum differenti al dose. annual, 3 times 90'" percentile sA determined from analys is in mrcm B0 = Quarterl y base line (mrem)

M0 = location's 9 1 day standard qu arter normalized dose (mrem per standard quarter) averaged between multiple TLDs at each locati on.

L0 = qu arterl y investigation level dose (mrem)

BA= baseline backgro und dose (m re m) (ann ual)

MA= ann ual monitoring data - Ma determined by normalizing avai lable quarterly data to 4 fu ll quarters

LA = annual investi gation level dose (mrem)

ND = not detected Section 3 - Page 22

3.9 LAND USE CENSUS The Land Use Census was conducted during the growing season (5/18 - 511912016) 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 2016 Land Use Census Results

Sector Distance Sector Distance (Miles) (Miles)

Nearest Residence 2.98 Nearest Residence 1.96 N Nearest Mil k An imal - s Nearest Milk An imal -

Nearest Residence 1.84 Nearest Residence 1.36 NNE Neare t Milk Animal - SSW Nearest Milk Animal -

Nearest Residence 1.20 Nearest Residence 1.27 NE Nearest Mi lk Animal - SW Nea rest Mitk Animal -

Nearest Residence 1.34 Nearest Residence 1.76 ENE Nearest Milk Animal - WSW Nearest Milk Animal -

Nearest Residence 1.64 Nearest Res idence 1.58 E Nearest Mi lk Animal 3.27<11 w Nearest Milk Anima l -

Nearest Res idence 1.57 Nearest Residence 1.35 ESE Nearest Milk Animal - WNW Nearest Milk Animal -

Nearest Residence 1.46 Nearest Residence 1.04 SE earest Milk Animal - NW Nearest Milk Animal -

Nearest Res idence 1.5-l Nearest Residence 1.03 SSE Nearest Mi lk Anim al - NNW Nearest Milk Animal -

- -** mdtcates no occ urrences wtthm the 5 mil e radius (I) Sample location is un able to supp ly suffi cient mil~ for participation in the RE IP sampling program . Broadlearvegetation is collected in lieu of mil k sampltng (N CR # 02045091)

GPS data rcflccl appro ximate accurac) to \\ithin 2-5 meters. GPS fie ld meas urements taken as cl ose as poss ibl e to the item o r in1crest Section 3 - Page 23

Figure 3.9 Oconee Nuclea r Station 20 16 Land Use Census Map Legend

ONS Residence

() ONSMilkAnimal*

/ " - / O S Railroads A/ NavteqHwys

,, " NavteqStreets r-~ States

[. =:~ Counties

- NHDWaterbody

Milk sample localion in East Sedor is unable I> supply enough m* lo participate in Ile REMP sampmg program. Bro:xlleat veoetatlon Is COiiected in lieu at mill< samp ng.

Approxsnale locatbn or features shown 0 0.5 2Miles

..:=-*-==---*

Projedion NCSP NAD27 Secti on 3 - Page 24

4.0 EVALUATION OF DOSE 4.1 DOSE FROM ENVIRONMENTAL MEASUREMENTS Annual doses to maximum exposed individuals were estimated based on measured concentrations of radionuclides in 2016 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 sample results were calculated 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 1.109 consumption rates for the maximum exposed individual were used in the calculations. A dose factor of zero was assumed when the guide listed "NO DATA" 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 4.1-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 vegetation, 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 m 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 2016 was 4.12E-2 mrem to the adult Jiver from the consumption of fish.

4.2 ESTIMATED DOSE FROM RELEASES Throughout the year, dose estimates were calculated based on actual 2016 liquid and gaseous effluent release data. Effluent-based dose estimates were calculated using the RETDAS computer program 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 RETDAS dose calculations are repmied in the Annual Radioactive Effluent Release Report.

Section 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 based 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 samples 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 2016 environmental sample results was 6. 91 E-2 mrem to the child liver. The maximum total organ dose of 1.58E-1 mrem for liquid effluent-based estimates was to the child liver, total body, thyroid, kidney, lung, and GI-LLI.

In calculations based on gaseous release pathways, vegetation was the predominant dose pathway for effluent samples. The gaseous effluent *dose is due to C-14 and tritium in broadleaf vegetat'ion. The maximum total organ dose for gaseous effluent estimates was 3.38E-1 mrem to the child bone, with C-14 being the primary dose contributor. No radioactivity was detected from gaseous pathways in environmental samples; therefore, there is no calculated dose.

The doses calculated do not exceed 40CFR190 or 10CFR50 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 limits and are described in the Annual Radiological Effluent Release Report (ARERR).

Section 4 - Page 2

TABLE 4.1-A Page 1 of 2 OCONEE NUCLEAR STATION 2016 ENVIRONMENTAL AND EFFLUENT DOSE COMPARISON LIQUID RELEASE PATHWAY Environmental Critical Critical Maximum Dose <3>

Organ Olr Aue(I) Location Pathway <2> (mrcm)

Effluent Data "'

Skin Environmental Teen Shoreline Sediment 067 (4.34 mi SSE) 3.57E-04 Skin Effluent Teen Shoreline Sediment Discharge Pt. 3.09E-04 Bone Environmental Child Fish 063 (0.80 mi ESE) 3.23E-02 Bone Effluent Child Fresh Water Fish Discharge Pt. 7.17E-03 Liver Environmental Child Fish 063 (0.80 mi ESE) 6.91E-02 Liver Effluent Child Drinking Water 18.9mi SSE l.58E-Ol T. Body Environmental Adult Fish 063 (0.80 mi ESE) 5.43E-02 T. Body Effluent Child Drinking Water 18.9 mi SSE 1.58E-01 Thyroid Environmental Child Drinking Water 066 ( 18.9 mi SSE) 3.82E-02 Thyroid Effluent Child Drinking Water 18.9 mi SSE 1.58E-Ol Kidney Environmental Child Drinking Water 066 (18. 9 mi SSE) 4.83E-02 Kidney Effluent Child Drinking Water 18.9 mi SSE 1.58E-01 Lung Environmental Child Drinking Water 066 (18.9 mi SSE)

4.l 8E-02 Lung Effluent Child Drinking Water 18.9 mi SSE 1.58E-01 GI-LLI Environmental Child Drinking Water 066 (18.9 mi SSE) 3.84E-02 Gl-LLI Effluent Child Drinking Water 18.9 mi SSE l.58E-01 (I) 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.

(3) Maximum dose is a summation of the fish, drinking water and shoreline 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 Location Effluent Data Age o> Pathway <2> (mrem)

Skin Environmental O.OOE+OO Skin Effluent All Ground Plane 1.0 mi. SW 4.88E-08 Bone Environmental O.OOE+OO Bone Effluent Child Vegetation 1.0 mi. SW 3.38E-Ol Liver Environmental O.OOE+OO

' Liver Effluent Child Vegetation 1.0 mi. SW 1.IOE-01 T. Body Environmental O.OOE+OO T. Body Effluent Child Vegetation 1.0 mi. SW 1. IOE-01 Thyroid Environmental O.OOE+OO Thyroid Effluent Child Vegetation 1.0 mi. SW 1. IOE-01 Kidney Enviromnental O.OOE+OO Kidney Effluent Child Vegetation 1.0 mi. SW 1.lOE-01 Lung Enviromnental O.OOE+OO Lung Effluent Child Vegetation 1.0 mi. SW l.lOE-01 GI-LLI Environmental O.OOE+OO GI-LLI Effluent* Child Vegetation 1.0 mi. SW l.IOE-01 (I) 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.

(3) Maximum dose is a summation of the ground/plane, inhalation, milk and vegetation pathways.

Section 4 - Page 4

TABLE 4.1-B _

Maximum Individual Dose for 2016 based on Environmental .Mea~*urements (mrem) for Oconee Nuclear Station Age Sample Medium Bone Liver 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 0.00E+OO Drinking Water O.OOE+OO 3.22E-02 3.22E-02 3.22E-02 3.22E-02 3.22E-02 3.22E-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 TOTAL O.OOE+OO 3.22E-02 3.22E-02 3.22E-02 3.22E-02 3.22E-02 3.22E-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 3.28E-02 3.28E-02 3.28E-02 3.28E-02 3.28E-02 3.28E-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 Broad leaf Vegetation O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+oo.

Fish 3.23E-02 3.63E-02 9.96E-03 5.40E-03 1.55E-02 9.02E-03 5.60E-03 O.OOE+OO Shoreline Sediment O.OOE+OO O.OOE+OO 6.40E-05 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 7.46E-05 TOTAL 3.23E-02 6.91E-02 4.28E-02 3.82E-02 4.83E-02 4.18E-02 3.84E-02 7.46E-05 Teen 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 1. 71 E-02 1.71E-02 l.71E-02 l.7 lE-02 1.7IE-02 1.71 E-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 Broad leaf Vegetation O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Fish 2.56E-02 4.06E-02 l .84E-02 6.54E-03 1.81 E-02 I. I OE-02 7.03E-03 O.OOE+OO Shoreline Sediment O.OOE+OO O.OOE+OO 3.06E-04 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 3.57E-04 TOTAL 2.56E-02 5.77E-02 3.58E-02 2.36E-02 3.52E-02 2.8IE-02 2.41E-02 3.57E-04 Adu!t 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 2.43E-02 2.43E-02 2.43E-02 2.43E-02 2.43E-02 2.43E-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 Broad leaf Vegetation O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Fish 2.39E-02 4.12E-02 2.99E-02 8.SOE-03 I .96E-02 l .22E-02 9.14E-03 O.OOE+OO Shoreline Sediment O.OOE+OO O.OOE+OO 5.48E-05 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 6.40E-05 TOTAL 2.39E-02 6.55E-02 5.43E-02 3.28E-02 4.39E-02 3.65E-02 3.34E-02 6.40E-05 Note: Dose tables are provided for sample media displaying positive nuclide occurrence.

Section 4 - Page 5

Oconee Nuclear Station Dose from Drinking Water Path wiry for 2016 Data Maximum Exposed J/1jant Infant Dose from Drinking Water Pathway (mrem) =Usage (I) x Dose Factor (mrem/pCi ingested) x Concentration (pCi/I)

Usage (intake in one year)= 330 I Highest Annual Net Mean Ingestion Dose Factor Concentration Dose {mrem}"

Indicator Water Radionuclide Bone Liver T. Bod)' Thyroid Kidney Lun~ GI-LL! Location (pCi/I) Bone Liver T. Body Thyroid Kidne)' Lung GI-LL!

Mn-54 NO DATA l.99E-05 4.51 E-06 NO DATA 4.41E-06 NO DATA 7.31E-06 ALL 0.00 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Co-58 NO DATA 3.60E-06 8.98E-06 NO DATA NO DATA NO DATA 8.97E-06 ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO U.OOE+OO O.OOE+OO .

Fe-59 3.USE-05 5.38E-05 2.12E-05 NO DATA NO DATA 1.59E-05 2.57E-05 ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO Co-60 NO DATA 1.0SE-05 2.55E-05 NO DATA NO DATA NO DATA 2.57E-05 ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 0.00E+OO Zn-65 l.8-IE-05 6.31 E-05 2.91E-05 NO DATA* 3.06E-05 NO DATA 5.33E-05 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 4.20E-08 1.73E-08 1.00E-08 NO DATA 1.24E-08 NO DATA 1.46E-05 ALL o.oo** O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO Zr-95 2.06E-07 5.0ZE-08 3.56E-08 NO DATA 5.4IE-08 NO DATA 2.50E-05 ALL 0.00 0.00E+OO O.OOE+UO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 0.00E+OO 1-131 3.59E-05 4.23E-05 1.86E-05 l.39E-02 4.94E-05 NO DATA 1.51 E-06 ALL 0.00 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Cs-134 3.77E-04 7.03E-0-1 7.IOE-05 NO DATA l.SIE-04 7.42E-05 1.91 E-06 ALL 0.00 O.OOE+OO O.OOE+OO U.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Cs-137 5.22E-04 6.11 E-04 4.33E-05 NO DATA l.64E-O-I 6.64E-05 1.91 E-06 ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO BaLa-140 l.71E-04 l.71E-07 8.81E-06 NO DATA 4.06E-08 l.OSE-07 4.20E-05 ALL 0.00 O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO H-3 NO DATA 3.0SE-07 3.08E-07 3.08E-07 3.08E-07 3.0SE-07 3.0SE-07 066 317 O.OOE+OO 3.22E-02 3.22E-02 3.22E-02 3.22E-02 3.22E-02 3.22E-02

Dose Commitment (mrcm) = O.OOE+OO 3.22E-02 3.22E-02 3.22E-02 3.22E-02 3.22E-02 3.22E-02 Section 4 - Page 6

Oconee Nuclear Station Dose from Drinking Water Pathway for 2016 Data Maximum Exposed Child Child Dose from Drinking Water Pathway (mrem) =Usage (I) x Dose Factor (mrem/pCi ingested2 x Concentration (1>Ci/I)

Usage (intake in one yearF 510 I Highest Annual Net Mean Ingestion Dose Factor Concentration Dose (mrem}

Indicator Water Radionuclide Bone Liver T.Body Thyroid Kidney Lung GI-LL! Location (pCi/l) Bone Liver T.Body Thyroid Kidney Lung GI-LL!

Mn-54 NO DATA l.07E-05 2,85E-06 NO DATA 3.00E-06 NO DATA 8.98E-06 ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO -- O.OOE+OO O.OOE+OO 0.00E+OO Co-58 NO DATA 1.SOE-06 5.SIE-06 NO DATA NO DATA NO DATA 1.0SE-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 Fe-59 l.65E-05 2.67E-05 1.33E-05 NO DATA NO DATA 7.74E-06 2.78E-05 ALL 0.00 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO 0.00E+OO 0.00E+OO O.OOE+OO C0-60 NO DATA 5.29E-06 1.56E-05 NO DATA NO DATA NO DATA 2.93E-05 ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+OO O.OO!c+OO !l.OOE+OO O.OOE+OO O.OOE+OO Zn-65 l.37E-05 3.65E-05 2.27E-05 NO DATA 2.30E-05 NO DATA 6.41E-06 ALL 0.00 O.OOE+OO. O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO 0.00E+OO 0.00E+OO Nb-95 2.25E-08 8.76E-09 6.26E-09 NO DATA 8.23E-09 NO DATA 1.62E-05 ALL 0.00 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 0.00E+OO 0.00E+OO Zr-95 l.lGE-07 2.SSE-08 2.27E-08 NO DATA 3.65E-08 NO DATA 2.66E-05 ALL 0.00 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO 1-131 1.72E-05 1.73E-05 9.83E-06 5.72E-03 2.84E-05 NO DATA l.54E-06 ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO Cs-134 2.34E-04 3.84E-04 8.IOE-05 NO DATA 1.19E-04 4.27E-05 2.07E-06 ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO Cs-137 3.27E-04 3.13E-04 4.62E-05 NO DATA l.02E-04 3.67E-05 l.96E-06 ALL 0.00 O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO BaLa-140 8.JIE-05 7.28E-08 4.SSE-06 NO DATA 2.37E-08 4.34E-08 4.21E-05 ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO H-3 NO DATA 2.03E-07 2.03E-07 2.03E-07 2.03E-07 2.03E-07 2.03E-07 066 317 O.OOE+OO 3.28E-02 3.28E-02 3.28E-02 3.28E-02 3.28E-02 3.28E-02 Dose Commitment (mrcm) = O.OOE+OO 3.28E-02 3.28E-02 3.28E-02 -- 3.28E-02 3.28E-02 3.28E-02 Section 4 - Page 7

Oconee Nuclear Station Dose from Fish Pathway for 2016 Data Maximum Exposed Child Child 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/I = 4285 pCi/I x 0.9 = 3857 pCi/kg Usage (intake in one year)= 6.9 kg Highest Annual Net Mean lni:;estion Dose Factor Concentration Dose (mrem}

Indicator Fish Radionuclide Bone Liver T. Body Thyroid Kidney Lung Gl-LLI Location (pCi/kg) Bone Liver T. Body Thyroid Kidney Lung Gl-LLI Mn-54 NO DATA 1.07E-05 2.85E-06 NO DATA 3.00E-06 NO DATA 8.98E-06 ALL 0.00 O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Co-58 NO DATA l.SOE-06 5.51E-06 NO DATA NO DATA NO DATA 1.05E-05 ALL 0.00 O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Fe-59 1.65E-05 2.67E-05 l.33E-05 NO DATA NO DATA 7.74E-06 2.78E-05 ALL 0.00 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 0.00E+OO C0-60 NO DATA 5.29E-06 l.56E-05 NO DATA NO DATA NO DATA 2.93E-05 ALL 0.00 0.00E+OO O.OOE+OO 0.00E+OO 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO Zn-65 I.37E-05 3.65E-05 2.27E-05 NO DATA 2.30£-05 NO DATA 6.41E-06 ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO 0.00E+OO O.OOE+OO Cs-134 2.34E-04 3.84E-04 8.IOE-05 NO DATA 1.19E-04 4.27E-05 2.07E-06

ALL 0.00 O.OOE+OO 0.00E+OO O.OOE+OO 0.00E+OO O.OOE+OO 0.00E+OO O.OOE+OO Cs-137 3.27E-04 3.13E-04 4.62£-05 NO DATA. 1.02E-04 3.67E-05 1.96E-06 063 14.3 3.23£-02 3.09£-02 4.56£-03 0.00E+OO I.OIE-02 3.62E-03 1.93E-04 H-3 NO DATA 2.03£-07 2.03E-07 2.03E-07 2.03E-07 2.03E-07 2.03E-07 063 3857 - O.OOE+OO 5.40£-03 5.40£-03 5.40E-03 5.40£-03 5.40E-03 5.40£-03 Dose Commitment (mrem) = 3.23E-02 3.63E-02 9.96E-03 5.40E-03 l.55E-02 9.02E-03 5.60£-03 Section 4 - Page 8

Oconee Nuclear Station Dose from Shoreline Sediment Pathway for 2016 Data Maximum Exposed Child Shoreline Recreation= 1.t hr (in one year)

Shore \Vidth Factor= 0.2 2

Sediment Surface i\fass = .to kg/m Child Dose from Shoreline Sediment Pathway (mrem) =Shoreline Recreation (hr) x External 2

Dose Factor (mrem/hr per pCi/m ) x Shore Width Factor x Sediment Surface Mass (kg/m2) x Sediment Concentration (pCi/kg)

External Dose Factor Standing Highest Annual Net on Contaminated Ground Mean Concentration 2

(mrem/hr per pCi/m ) Indicator Sediment (mrem)

Radionuclide T. Body Skin Location (pCi/kg) T.Body Skin Cs-134 1.20E-08 l.40E-08 ALL 0.00 O.OOE+OO O.OOE+OO Cs-137 4.20E-09 4.90E-09 067 136 6.40E-05 7.46E-05 Dose Commitment (mrem) = 6.40E-05 7.46E-05 Section 4 - Page 9

Oconee Nuclear Station Dose from Drinking Water Pathway for 2016 Data Maximum Exposed Teen Teen Dose from Drinking Water Pathway (mrem) =Usage (I) x Dose Factor (mrem/pCi ingested) x Concentration (pCi/l)

Usage (intake in one year)= 510 I Highest Annual Net Mean Ini:estion Dose Factor Concentration Dose (rnrern)

Indicator \Vatcr Radionuclide Bone Liver T. Body . Thyroid Kidney Lung GI-LL! Location (pCi/1) Bone Liver T. Body Thyroid Kidney Lung GI-LL!

Mn-54 NO DATA 5.90E-06 l.17E-06 NO DATA 1.76E-06 NO DATA l.21E-05 ALL O.QO O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO 0.00E+OO Co-58 NO DATA 9.72E-07 2.24E-06 NO DATA NO DATA NO DATA J.34E-05 ALL o;oo O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Fe-59 5.87E-06 1.37E-05 5.29E-06 NO DA TA NO DA TA 4.32E-06 3.24E-05 ALL 0.00 O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Co-60 NO DATA 2.81E-06 6.33E-06 NO DATA NO DATA NO DATA 3.66E-05 ALL 0.00 O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO O.OCJE+OO O.OOE+OO Zn-65 5.76E-06 2.00E-05 9.33E-06 NO DATA 1.28E-05 NO DATA 8.47£-06 ALL 0.00 O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Nb-95 8.22E-09 4.56£-09 2.SIE-09 NO DATA 4.42E-09 NO DA TA 1.95E-05 ALL 0.00 O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Zr-95 4.12E-08 1.30E-08 8.94E-09 NO DATA l.9IE-08 NO DATA 3.00E-05 ALL 0.00 O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 1-131 5.85E-06 8.19E-06 4.40E-06 2.39E-03 J.41E-05 NO DA TA l.62E-06 ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO Cs-134 8.37E-05 1.97E-04 9.14E-05 NO DA TA 6.26E-05 2.39E-05 2.45E-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 1.12E-04 J.49E-04 5.19E-05 NO DA TA 5.07E-05 l.97E-05 2.12E-06 ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO BaLa-140 2.84E-05 3.48E-08 1.83E-06 NO DATA 1.181~-08 2.34E-08 4.38E-05 ALL 0.00 O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO H-3 NO DATA J.06E-07 J.06E-07 1.06E-07 1.06E-07 l.06E-07 l.06E-07 066 317 O.OOE+OO l.71E-02 l.71E-02 1.71E-02 l.71E-02 1.71E-02 l.71E-02 Dose Commitment (mrcm)= O.OOE+OO l.71E-02 l.71E-02 1.71 E-02 l.71E-02 J.71E-02 1.71E-02 Section 4 - Page I 0

Oconee Nuclear Station Dose from Fish Pathway for 2016 Data Maximum Exposed Teen Teen 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/I x Bioaccumulation Factor 0.9 pCi/kg per pCi/I = 4285 pCi/l x 0.9 = 3857 pCi/kg Usage (intake in one year)= 16 kg Highest Annual In~estion Dose Factor Net Mean Dose {mrem)

Concentration Radionuclide Bone Liver T. Body Thyroid . Kidney Lung Gl-LLI Location (pCi/kg) Bone Liver T.Body Thyroid Kidney Lung Gl-LLI Mn-54 NO DATA 5.90E-06 1.17E-06 NO DATA 1.76E-06 NO DATA l.21E-05 ALL 0.00 ~ O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO 0.00E+OO Co-58 NO DATA 9.72E-07 2.24E-06 NO DATA NO DATA NO DATA l.34E-05 ALL 0.0 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO Fc-59 5.87E-06 l.37E-05 5.29E-06 NO DATA NO DATA -l.32E-06 3.2-IE-05 ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 0.00E+OO Co-60 NO DATA 2.SIE-06 6.33E-06 NO DATA NO DATA NO DATA 3.66E-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 Zn-65 5.76E-06 2.00E-05 9.33E-06 NO DATA 1.28E-05 NO DATA 8.47E-06 ALL 0.00 O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO Cs-134 8.37E-05 l.97E-04 9.14E-05 NO DATA 6.26E-05 2.39E-05 2.-15E-06 ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO 0.00E+OO Cs-137 1.12E-04 l.49E-O-I 5.19E-05 NO DATA 5.07E-05 1.97E-05 2.12E-06 063 14.3 2.56E-02 3AIE-02 1.19E-02 O.OOE+OO 1.16E-02 4.5!E-03 4.85E-04 H-3 NO DATA !.06E-07 1.06E-07 1.06E-07 l.06E-07 1.06E-07 !.06E-07 063 3857 O.OOE+OO 6.5-IE-03 6.5-IE-03 6.5-IE-03 6.5-IE-03 6.54E-03 6.54E-03 Dose Commitment (mrem) = 2.56E-02 -l.06E-02 1.84E-02 6.54E-03 l.81E-02 l.IOE-02 7.03E-03 Section 4 - Page 11

Oconee Nuclear Station Dose from Shoreline Sediment Pathway for 2016 Data Maximum Exposed Teen Shoreline Ret*reation = 67 hr (in one year)

Shore Width Factor= 0.2 Sediment Snrfat*e :'\lass= 40 kg/m2 Teen Dose from Shoreline Sediment Pathway (mrem) =Shoreline Recreation (hr) x External Dose Factor (mrem/hr per pCi/m 2) x Shore Width Factor x Sediment Surface Mass (kg/nf) x Sediment Concentration (pCi/kg)

Extern:il Dose Factor Standing Highest Annual Net on Contaminated Ground Mean Concentration (mrcm/hr per pCi/m2) Indicator Sediment (mrem)

Radionuclide T. Body Skin Location (pCi/kg) - T. Body Skin Cs-134 1.20E-08 1.40E-08 ALL 0.00 O.OOE+OO O.OOE+OO Cs-137 4.20E-09 4.90E-09 067 136 3.06E-04 3.57E-04 Dose Commitment (mrem) = 3.06E-04 3.57E-04 Section 4 - Page 12

Oconee Nuclear Station Dose from Drinking Water Pathway for 2016 Data Maximum Exposed Adult Adult Dose from Drinking Water Pathway (mrem) =Usage (I) x Dose Factor (mrem/pCi ingested) x Concentration (pCi/I)

Usage (intake in one year)= 730 I Highest Annual Net Mean In~estion Dose Factor Concentration Dose (mrem)

Indicator \Yater Radionuclide Bone Liver T. Body Thyroid Kidney Lung Gl-LLI Lo ration (pCi/1) Bone Liver T. Body Thyroid Kidney Lung GI-LLI Mn-54 NO DATA 4.57E-06 8.72E-07 NO DATA 1.36E-06 NO DATA 1.-IOE-05 ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO

Co-58 NO DATA 7.-ISE-07 I.67E-06 NO DATA NO DATA NO DATA I.51E-05 ALL 0.00 O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Fe-59 4.34E-06 I.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+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Co-60 NO DATA 2.l-IE-06 4.72E-06 NO DATA NO DATA NO DATA 4.02E-05 ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO Zn-65 4.84E-06 l.54E-05 6.96E-06 NO DATA I.03E-05 NO DATA 9.70E-06 ALL 0.00 O.OOE+OO n.OOE+OO O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO 0.00E+OO Nb-95 6.22E-09 3.46E-09 I.86E-09 NO DATA 3.42E-09 NO DATA 2.IOE-05 ALL 0.00 O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO Zr-95 3.04E-08 9.75E-09 6.60E-09 NO DATA l.53E-08 NO DATA 3.09E-05 ALL 0.00 O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO 1-131 4.16E-06 5.95E-06 3.41E-06 I.95E-03 I.02E-05 NO DATA I.57E-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-134 6.22E-05 1.48E-04 l.21E-04 NO DATA 4.79E-05 I.59E-05 2.59E-06 ALL 0.00 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO Cs-137 7.97E-05 1.09E-04 7.14E-05 NO DATA 3.70E-05 1.23E-05 2.11 E-06 ALL 0.00 O.OOE+OO 0.00E+OO O.OOE+OO 0.00E+OO 0.00E+OO O.OOE+OO 0.00E+OO BaLa-140 2.03E-05 2.SSE-08 l.33E-06 NO DATA 8.67E-09 I.46E-08 4.ISE-05 ALL 0.00 O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO 0.00E+OO O.OOE+OO H-3 NO DATA 1.0SE-07 I.OSE-07 I.OSE-07 I.OSE-07 l.OSE-07 I.OSE-07 066 317 O.OOE+OO 2.43E-02 2.43E-02 2.43E-02 2.43E-02 2.43E-02 2.43E-02 Dose Commitment (mrem) = O.OOE+OO 2.43E-02 2.43E-02 2.43E-02 2.43E-02 2.43E-02 2.43E-02 Section 4 - Page 13

Oconee Nuclear Station Dose from Fish Pathway for)016 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/I x Bioaccumulation Factor 0.9 pCi/kg per pCi/I = 4285 pCi/I x 0.9 = 3857 pCi/kg Usage (intake in one year)= 21 kg Highest Annual Net Mean Ingestion Dose Factor Concentration Dose (mrem)

Radionuclide Bone Liver T. Body Thyroid Kidney Lung Gl-LLI Location (pCiiki;) Bone Liver T. Body Thyroid Kidney Lung GI-LLI Mn-54 NO DATA 4.57E-06 8.72E-07 NO DATA I.36E-06 NO DATA IAOE-05 ALL 0.00 0.00E+OO O.OOE+OO O.OOE+OO 0.00E+OO 0.00E+OO 0.00E+OO O.OOE+OO Co-58 NO DATA 7.45E-07 l.67E-06 NO DATA NO DATA NO DATA I.51E-05 ALL 0.00 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO F<~59 4.34E-06 1.02E-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+OO O.OOE+OO 0.00E+OO O.OOE+OO 0.00E+OO Co-60 NO DATA 2.14E-06 4.72E-06 NO DATA NO DATA NODAL\ 4.02E-05 ALL 0.00 O.OOE+OO 0.00E+OO 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO 0.00E+OO Zn-65 4.84E-06 l.54E-05 6.96E-06 NO DATA 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 0.00E+OO O.OOE+OO Cs-134 6.22E-05 1.48E-04 l.21E-04 NO DATA 4.79E-05 1.59E-05 2.59E-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-05 l.09E-04 7.14E-05 NO DATA 3.70E-05 l.23E-05 2.llE-06 063 14.3 2.39E-02 3.27E-02 2.l-IE-02 O.OOE+OO 1.1 lE-02 3.69E-03 6.34E-04 H-3 NO DATA 1.0SE-07 l.OSE-07 l.OSE-07 l.OSE-07 1.0SE-07 l.05E-07 063 3857 0.00E+OO 8.50E-03 8.SOE-03 8.SOE-03 8.50E-03 8.50E-03 8.SOE-03 Dose Commitment (mrem) ~ 2.39E-02 4.12E-02 2.99E-02 8.SOE-03 1.96E-02 1.22E-02 9.14E-03 Section 4 - Page 14

Oconee Nuclear Station Dose from Shoreline Sediment Pat~~way for 2016 Data Maximum Exposed Adult Shoreline Recreation = 12 hr (in one year)

Shorr Width Factor= 0.2 2

Sediment Surface i\'fass = 40 kg/m Adult Dose from Shoreline Sediment Pathway (mrem) =Shoreline Recreation (hr) x External 2 2 Dose Factor (mrem/hr per pCi/m ) x Shore Width Factor x Sediment Surface Mass (kg/m ) x Sediment Concentration (pCi/kg)

External Dose Factor Standing Highest Annual Net on Contaminated Ground Mean Concentration (mrem)

(mrem/hr per pCi/m 2) Indicator Sediment Radionuclide T. Body Skin Location (pCi/kg) T.Body Skin Cs-134 l.20E-08 J.40E-08 ALL 0.00 0.00E+OO O.OOE+OO Cs-137 4.20E-09 4.90E-09 067 136 5.48E-05 6.40E-05 Dose Commitment (mrem) = 5.48E-05 6.40E-05 Section 4 - Page 15

5.0 QUALITY ASSURANCE 5.1 SAMPLE COLLECTION EnRad Laboratories and the Envirom11ental Water Resources Group performed the environmental sample collections as specified by approved sample collection procedu'res.

5.2 SAMPLE ANALYSIS EnRad Laboratories perfo1med 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 enviroll11ental dosimetry measurements as specified by approved dosimetry analysis procedures.

5.4 LABORATORY EQUIPMENT QUALITY ASSURANCE 5.4.1 DAILY QUALITY CONTROL EnRad Laboratories has an internal quality assurance program which monitors each type of instrumentation for reliability and accuracy. Daily quality control checks ensure that instruments are in proper working order and these checks are used to monitor instrument performance.

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

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 2016 Duke Energy Enviromnental Laboratory (EnRad) pmiicipated in interlaboratory programs to satisfy Radiological Environmental Monitoring Program requirements in Section 5 - Page l

. Duke Energy nuclear plant Offsite D?se Calculatio!l Manuals and Selected Licensee Commitments Manuals, as applicable. In addition, EnRad Laboratory participated in the ERA RadCheMTM Proficiency Testing program to satisfy North Carolina state drinking water radiochemistry certification requirements.

EnRad Laboratory participated in three interlaboratory programs: Eckert & Ziegler Analytics (EZA), ERA, and Fleet Scientific Services (FSS). EZA results were evaluated against IP 84750 acceptance criteria stated in EnRad Procedure 515, Cross Check Program Administration. ERA evaluated reported results based on National Enviromnental Laboratory Accreditation Conference (NELAC) Field of Proficiency Testing criteria. FSS results were evaluated as prescribed in Duke Energy Nuclear Generation Procedure SRPMP 9-2.

Low-level Iodine-131 analysis of drinking water was not required during 2016 since the dose calculated for the consumption of the water was not greater than 1 mrem per year and there were no abnormal releases exceeding 1 pCi/liter I-131 in 2016 in the ONS program. This dose was calculated monthly during 2016 to ensure that low-level Iodine-131 analysis of drinking water samples was not required.

5.5.1 DUKE ENERGY INTERLABORATORY PROGRAM EnRad Laboratories participated in the Duke Energy Fleet Scientific Services (FSS) Interlaboratory Program during 2016. Interlaboratory cross check samples including mixed gamma in water (Marinelli beakers), low-level 1-131 in water, gross beta in water, and tritium in water samples were analyzed during 2016. A summary of the EnRad Laboratory program results for 2016 is documented in Table 5.0-A.

Interlaboratory cross checks were distributed by Fleet Scientific Services (FSS) staff in accordance with SRPMP 9-2. One media type, water, was analyzed for mixed gamma, tritium, beta, and LLl-131. Table 5.0-A lists results for specific analyses. One-hundred and seventy-four results were reported of which 164 (94.3%) were in agreement.

NCR # 02072622 was written by FSS staff due to five out of nine third qumier alpha nuclide results from the FSS cross check samples Alpha/Beta in Water (Ql63ABW1, Q163ABW2 and Q163ABW3) showed non-agreement, three other results showed warning limit evaluations.

In the third quarter of 2016, one data set of the tlu*ee analyzed for. FSS Tritium in Water Sample Q163TWR3 showed a low bias when compared to the known value.

NCR # 02074856 was initiated to investigate why this sample set was lower than expected.

5.5.2 ECKERT & ZIEGLER ANALYTICS CROSS CHECK PROGRAM EnRad Laboratories participated in the Eckert & Ziegler Analytics Cross Check Program during 2016. Cross check. samples including air filters (single and composites), air cartridges, gross beta in water, various mixed gamma samples in Section 5 - Page 2

Marinelli beakers (soil, vegetation, milk,_ and water), t\itium in water, and Iodine in milk and water samples were analyzed at various times of the year. A summary of the EnRad Laboratory program results for 2016 is documented in Table 5.0-B.

Interlaboratory cross check samples from EZA were received and analyzed in all four quarters of 2016. Table 5.0-B lists the performance for specific samples.

Seventy-nine results were reported of which 79 (100%) met the acceptance criteria based on IP 84750. Five EZA cross check samples did exhibit either a high or low bias in at least one nuclide of interest and EnRad proactively initiated NCRs to investigative these biases. The first bias was found in the second quarter gross alpha/beta in water sample (El 1527), where a high alpha activity bias was evident in the sample set. NCR # 02052857 was written to investigate the high alpha activity bias in the water samples.

In the third quarter of 2016, the Gamma in Composite Filter cross check (E 11590) showed a low activity bias for the Cr-51 nuclide, the other eight reported nuclides were all found to be in trend. NCR # 02080821 was initiated to track the actions for investigating the Cr-51 activity bias. The Gamma in Water cross check (El 1588), which was also analyzed in the third quarter of 2016 showed a high activity bias for the Fe-59 isotope. The remaining nine isotopes of sample El 1588 were all founq _to be within trend, NCR# 02074444 was written to inyestigate the high Fe-59 activity bias.

NCR# 02027474 was written to document and track the associated actions of an overall high activity bias in the LLI-131 in Milk cross check samples (El 1472) analyzed in the first quarter of 2016. In the second quarter of 2016, LLI-131 in Water cross check samples (El 1526) also showed an overall high bias within the sample set. NCR# 02045683 was initiated to investigate this continued LLI-131 bias since the samples are analyzed the same and the simulated milk matrix is similar to that of the water. In the third quarter of 2016, cross check El 1592, LLI-131 in Milk was analyzed and no activity bias was evident.

5.5.3 ERA PROFICIENCY TESTING EnRad Laboratories performed method proficiency testing through a program administeted by Environmental Resource Associates (ERA) of Arvada, CO. ERA supplied requested method proficiency samples for analysis and nuclide concentration determination. ERA rep01ied proficiency test results to the North Carolina Department of Health and Human Services, No1ih Carolina Public Health Drinking Water Laboratory Ce1iification Program. A summary of these proficiency test data for 2016 is documented in Table 5.0-C.

Proficiency samples were distributed in the second and fourth quarters. Table 5.0-C summarizes the results and evaluation. Fomieen results were reported of which 14 (100%) were in agreement.

Two NCRs were proactively written to investigate nuclide activity biases seen in ERA Proficiency Samples. NCR # 02032824 was written to investigate a high activity bias in the Zn-65 nuclide of Proficiency Sample RAD-105, Gamma Section 5 - Page 3

Emitters _in Water, which was analyzed in the_ second quart.er of 2016. The remaining four identified nuclides in sample RAD-105 were within trend. In the fourth quarter of 2016, NCR # 02081918 was written to document and track the actions of an overall high bias in the sample set for Proficiency Sample RAD-107, I-131 in Water. However, during review of data for AREOR preparations, it was found that the closure for NCR# 02081918 was insufficient to explain the event, so NCR# 02103716 was generated to better document the possible cause of the I-131 bias.

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 a~'d Records participates in a quarterly TLD intercomparison program administered by Nuclear Technology Services, Inc. of Roswell, GA.

Nuclear Technology Services irradiates environmental dosimeters quaiierly and sends them to the Radiation Dosimetry and Records group for analysis of the unknown estimated delivered exposure. A summary of the 2016 Nuclear Technology Services lntercomparison Report is documented in Table 5.0-D.

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. During third and fomih quarters of 2016 an environmental external TLD cross check failed and NCR # 02106779 was written to document the failures. To prevent recurrence, the two TLDs were pulled and visually inspected for abnormalities in the elements and overall integrity of the TLDs and no abnormalities were found. The two TLDs were then annealed and iITadiated to I 00 GU, then read 7 days later. Both TLDs over responded on E3 or E4 and were outside of the 10% acceptance criteria per procedure RD/O/B/4000/13, Environmental Monitoring. TLD # 103523 and 103511 were both removed from Environmental TLD inventory and removed from service.

Complete documentation of any evaluation will be available and provided to the NRC upon request.

Section 5 - Page 4

TABLE 5.0-A DUKE ENERGY INTERLABORATORY COMPARISON PROGRAM 2016 EnRad Fleet Scientific Services Cross Check Performance Summary lnterlaboratory cross checks were distributed by Fleet Scientific Services (FSS) staff in accordance with SRPMP 9-2.

One media type, water, was analyzed for mixed gamma, tritium, beta, and LLI-131. Table 5.0-A lists results for specific analyses. One-hundred and seventy-four results were repo1ied of which I 64 (94.3%) were in agre-ernent.

En Rad GO EnRad/GO Sample Sample ID Nuclide Quaiier Units Evaluation Value Value Ratio Gamma in QI6IGWR l pCi/L 7540 6890 l.09 Agreement Water 1.0 L Mn-54 1 pCi/L 7500 6890 1.09 Agreement 1 pCi/L 7540 6890 l.09 Agreement 1 pCi/L 4960 4880 1.02 Agreement Co-57 1 pCi/L 5060 4880 l.04 Agreement 1 pCi/L 5070 4880 l.04 Agreement 1 pCi/L 4400 4370 1.0 l Agreement Co-60 I pCi/L 4760 4370 1.09 Agre.::ment 1 pCi/L 4530 4370 1.04 Agreement 1 pCi/L 11900 10600 1.12 Agreement Zn-65 1 pCi/L 12200 10600 1.15 Agreement l pCi/L 11800 10600 1.11 Agreement l pCi/L 3170 3310 0.96 Agreement Y-88 1 pCi/L 3460 3310 1.04 Agreement 1 pCi/L 3270 3310 0.99 Agreement 1 pCi/L 9800 9190 1.07 Agreement*

Sn-I 13 1 pCi/L 9720 9190 l.06 Agreement 1 pCi/L 9700 9190 1.06 Agreement 1 pCi/L 6970 7750 0.90 Agreement Cs-134 1 pCi/L 7020 7750 0.91 Agreement 1 pCi/L 6980 7750 0.90 Agreement 1 pCi/L 5240 4930 1.06 Agreement Cs-137 1 pCi/L 5340 4930 1.08 Agreement 1 pCi/L 5230 4930 1.06 Agreement Section 5 - Page 5

TABLE 5.0-A (Cont.)

En Rad GO EnRad/GO Sample Sample ID Nuclide Quarter Units Evaluation Value Value Ratio Gamma in Ql61GWR I pCi/L 7640 6890 1.11 Agreement Water 3.5 L Mn-54 l pCi/L 7680 6890 l.12 Agreement 1 pCi/L 7690 6890 1.12 Agreement 1 pCi/L 5110 4880 1.05 Agreement Co-57 1 pCi/L 5240 4880 1.07 Agreement 1 pCi/L 5210 4880 l.07 Agreement I pCi/L 4750 4370 1.09 Agreement Co-60 I pCi/L 4710 4370 1.08 Agreement I pCi/L 4630 4370 l.06 Agreement I pCi/L 11900 10600 l.12 Agreement Zn-65 I pCi/L 12000 10600 1.13 Agreement I pCi/L : : 11800 10600 1.11 Agreement I pCi/L 3360 3310 I.OJ Agreement Y-88 I pCi/L 3490 3310 1.05 Agreement 1 pCi/L 3380 3310 l.02 Agreement I pCi/L 9970 9190 I.OS Agreement Sn-113 I pCi/L 9970 9190 1.08 Agreement 1 pCi/L 9860 9190 1.07 Agreement I pCi/L 7410 7750 0.96 Agreement Cs-134 I pCi/L 7390 7750 0.95 Agreement I pCi/L 7350 7750 0.95 Agreement l pCi/L 5340 4930 1.08 Agreement Cs-137 I pCi/L 5420 4930 I. I0 Agreement I pCi/L 5250 4930 1.06 Agreement Sectimi 5 - Page 6

TABLE 5.0-A (Cont.)

En Rad GO En Rad/GO Sample Sample JD Nuclide Quarter Units Evaluation Value Value Ratio QI63GWR 3 pCi/L 30400 26400 1.15 Agreement Gamma in 0.25 L Cr-51 3 pCi/L 28800 26400 1.09 Agreement Water 3 pCi/L 28600 26400 1.08 Agreement 3 pCi/L 26700 21800 1.23 Agreement Mn-54 3 pCi/L 25300 21800 I.I 6 Agn:ement 3 pCi/L 24900 21800 1.14 Agreement 3 pCi/L 23100 20200 1.14 Agreement Co-58 3 pCi/L 21700 20200 1.07 Agreement 3 pCi/L 21500 20200 1.06 Agreement 3 pCi/L 19100 14900 1.28 Warning 1 Fe-59 3 pCi/L 18100 14900 1.21 Agreement

' 3 pCi/L <18000 14900 1.20 Agreement 3 pCi/L 38100 31400 1.21 Agreement Co-60 3 pCi/L 35600 31400 l.13 Agreement 3 pCi/L 35600 31400 1.13 Agreement 3 pCi/L 52500 40000 1.31 Warning 1 Zn-65 3 pCi/L 49200 40000 l.23 Agreement 3 pCi/L 49100 40000 1.23 Agreement 3 pCi/L 32100 31300 l.03 Agreement Cs-134 3 pCi/L 30200 31300 0.97 Agreement 3 pCi/L 29700 31300 0.95 Agreement 3 pCi/L 25900 22100 1.17 Agreement Cs-137 3 pCi/L 24500 22100 1.11 Agreement 3 pCi/L 24100 22100 1.09 Agreement 3 pCi/L 16900 14700 I. I 5 Agreement Ce-141 3 pCi/L 15800 14700 l.08 Agreement 3 pCi/L 16100 14700 I. I0 Agreement I) Warnings were caused by expected double humped co111c1dence sunurnng and the FSS cross check provider did not request an mvest1gat1on and does not constitute a non-agreement.

Section 5 - Page 7

TABLE 5.0~A (Cont.)

En Rad GO En Rad/GO Sample Sample ID Nuclide Quarter Units Evaluation Value Value Ratio Ql63GWR 3 pCi/L 27200 26400 1.03 Agreement Gamma in 0.5 L Cr-51 3 pCi/L 27200 26400 1.03 Agreement Water 3 pCi/L 26900 26400 1.02 Agreement 3 pCi/L 23700 21800 1.09 _:\greement Mn-54 3 pCi/L 23900 21800 I. I 0 Agreement 3 pCi/L 24000 21800 1.10 Agreement 3 pCi/L 20400 20200 I.OJ Agreement Co-58 3 pCi/L 20700 20200 l.02 Agreement 3 pCi/L 20700 20200 1.02 Agreement 3 pCi/L 16800 14900 1.12 Agreement Fe-59 3 pCi/L 17100 14900 1.14 Agreement 1._ .'

3 pCi/L 17200 . 14900 1.15 Agreement 3 pCi/L 33500 31400 1.07 Agreement Co-60 3 pCi/L 34200 31400 1.09 Agreement 3 pCi/L 34000 31400 1.08 Agreement 3 pCi/L 46100 40000 1.15 Agreement Zn-65 3 pCi/L 47000 40000 1.17 Agreement 3 pCi/L 46900 40000 1.17 Agreement 3 pCi/L 30900 31300 0.99 Agreement Cs-134 3 pCi/L 28800 31300 0.92 Agreement 3 pCi/L 28800 31300 0.92 Agreement 3 pCi/L 22900 . 22100 l.04 Agreement Cs-137 3 pCi/L 23300 22100 l.05 Agreement 3 pCi/L 23200 22100 1.05 Agreement 3 pCi/L 15000 14700 1.02 Agreem.ent Ce-141 3 pCi/L 15300 14700 1.04 Agreement 3 pCi/L 15300 14700 1.04 Agreement Section 5 - Page 8

TABLE 5.0-A (Cont.)

En Rad GO En Rad/GO Sample Sample ID Nuclide Quarter Units Evaluation Value Value Ratio Ql63GWR 3 pCi/L 27700 26400 1.05 Agreement Gamma in 3.5 L Cr-51 3 pCi/L 27600 26400 1.04 Agreement Water 3 pCi/L 27400 26400 1.04 Agreement 3 pCi/L 23600 21800 1.08 Agreement Mn-54 3 pCi/L 23800 21800 1.09 Agreement 3 pCi/L 23700 21800 1.09 Agreement 3 pCi/L 20600 20200 1.02 Agreement Co-58 3 pCi/L 20800 20200 1.03 Agreement 3 pCi/L 20700 20200 1.02 Agreement 3 pCi/L 16500 14900 I. IO Agreement Fe-59 3 pCi/L 16700 14900 I. 12 Agreement 3 pCi/L 16500 14900 I. I0 Agreement 3 pCi/L 34100 31400 1.09 Agreement Co-60 3 pCi/L 34100 31400 1.09 Agreement 3 pCi/L 34000 31400 1.08 Agreement 3 pCi/L 45600 40000 I. 14 Agreement Zn-65 3 pCi/L 45900 40000 1.15 Agreement 3 pCi/L 45500 40000 I. 14 Agreement 3 pCi/L 32700 31300 1.05 Agreement Cs-134 3 pCi/L 30100 31300 0.96 Agreement 3 pCi/L 29900 31300 0.96 Agreement 3 pCi/L 23100 22100 1.05 Agreement Cs-137 3 pCi/L 23400 22100 1.06 Agreement 3 pCi/L 23200 22100 1.05 Agreement 3 pCi!L 15400 14700 1.05 Agreement Ce-141 3 pCi/L 15700 14700 1.07 Agreement 3 pCi/L 15500 14700 1.06 Agreement Section 5 - Page 9

TABLE 5.0-A (Cont.)

En Rad GO EnRad/GO Sample Sample ID Nuclide Qumier Units Evaluation Value Value Ratio Tritium in I pCi/L. 4880 4730 1.03 Agreement Water QI61TWR1 H-3 I pCi/L 4810 4730 1.02 Agreement 1 pCi/L 4770 4730 1.01 Agreement 1 pCi/L 80200 81200 0.99 Agreement Q161TWR2 H-3 1 pCi/L 80100 81200 0.99 Agreement 1 pCi/L 79700 81200' 0.98 Agreement 1 pCi/L 488 471 1.04 Agreement Q161TWR3 H-3 I pCi/L 478 471 1.02 Agreement 1 pCi/L 479 471 1.02 Agreement Tritium in 3 pCi/L 1230 1250 0.98 Agreement Water QI63TWR1 H-3 3 pCi/L 1170 1250 0.93 Agreement 3 pCi/L 1220 1250 0.97\'. Agreement 3 pCi/L 134000 134000 1.00 Agreement Q163TWR2 H-3 3 pCi/L 134000 134000 1.00 Agreement 3 pCi/L 132000 134000 0.99 Agreement 3 pCi/L 380 387 0.98 Agreement2 Ql63TWR3 H-3 3 pCi/L Agrecment2 388 387 1.00 3 pCi/L 413 1.07 Agreement 2 387

2) NCR# 02074856 Section 5 -Page 10

TABLE 5.0-A (Cont.)

Sample Sample ID En Rad GO En Rad/GO Nuclide Quarter Units Evaluation Value Value Ratio 2 pCi/L 84.7 79.6 1.06 Agreement LLI-131 in Q162LIW4 1-131 2 pCi/L 85.6 79.6 1.07 Agreement Water 2 pCi/L 84.4 79.6 1.06 Agreement 2 pCi/L 2030 1850 1.10 Agreement Ql62LlW5 I-131 2 pCi/L 1950 1850 1.05 Agreement 2 pCi/L 2000 1850 1.08 Agreement 2 pCi/L 403 380 1.06 Agreement Q162LIW6 I-131 2 pCi/L 396 380 1.04 Agreement 2 pCi/L 391 380 1.03 Agreement Alpha Beta in 3 pCi/L 603 470 1.28 Warning3 Water Am-241 3 pCi/L 591 470 1.26 Warnino 3

. b

' 3 pCi/L 588 470 1.25 '*

Agreement QI63ABW1 Cs-137 3 pCi/L 293 289 1.01 Agreement 3 pCi/L 293 289 1.01 Agreeinent 3 pCi/L 288 289 1.00 Agreement 3 pCi/L 381 271 1.41 Non-Agreement 3 Am-241 3 pCi/L 380 271 1.40 Non-Agreement' 3 pCi/L 377 271 1.39 Non-Agreement' Ql63ABW2 3 pCi/L 262 258 1.02 Agreement Cs-137 3 pCi/L 260 258 1.01 Agreement 3 pCi/L 270 258 1.05 Agreement 3 pCi/L 321 238 1.35 N on-Agreement3 Am-241 3 pCi/L 326 238 1.37 Non-Agreement' Ql63ABW3 3 pCi/L 308 238 1.29 Warning3 3 pCi/L 489 493 0.99 Agreement Cs-137 3 pCi/L 486 493 0.99 Agreement 3 pCi/L 483 493 0.98 Agreement

3) NCR# 02072622 Section 5 - Page 11

TABLE 5.0-B ECKERT & ZIEGLER ANALYTICS CROSSCHECK PROGRAM 2016 Cross Check Results for EnRad Laboratories Interlaboratory cross check samples from EZA were received and analyzed in all four quarters of 2016. Results are repo1ted directly to Eckert & Ziegler Analytics. Environmental cross check samples \Vere analyzed in replicate, and the result closest to the mean is repo1ted to Eckert & Ziegler Analytics. The acceptance criteria for the program was based on the NRC Inspection Manual Procedure 84750 (IP 84750). Table 5.0-B lists the performance for specific samples.

Seventy-nine results were reported of which 79 (I 00%) met the acceptance criteria based on IP 84750.

En Rad EZA EnRad/EZA Sample Sample ID Nuclide Qumter Units Evaluation Value Value Ratio El 1474A Cs-137 I pCi 139 134 1.05 Agreement Beta Filter in El 1591 Cs-137 3 pCi 55.5 56.7 0.98 Agreement Planchet El 1665A Cs-137 4 pCi 225 228 0.99 Agreement l.

Gamma in El 1529 Ce-141 2 '*

pCi/g 0.19 0.21 0.92 Agreement '

Soil Cr-51 2 pCi/g 0.41 0.42 0.98 Agreement Cs-134 2 pCi/g 0.26 0.27 0.97 Agreement Cs-137 2 pCi/g 0.25 0.26 0.94 Agreement Co-58 2 pCi/g 0.20 0.22 0.91 Agreement Mn-54 2 pCi/g 0.20 0.19 1.02 Agreement Fe-59 2 pCi/g 0.19 0.19 1.04 Agreement Zn-65 2 pCi/g 0.37 0.36 1.04 Agreement Co-60 2 pCi/g 0.25 0.26 0.96 Agreement LL!-131 El 1526 1-131 2 pCi/L 109 99.8 1.09 Agreement 1 in Water Gross Arn-241 2 pCi/L 83.6 74.9 1.12 Agrcemcnt 2 Alpha/Beta in El 1527 Water Cs-137 2 pCi/L 251 250 1.00 Agrecment2 Gamma in El 1528 Ce-141 2 pCi/g 0.23 0.23 1.0 I Agreement Vegetation Cr-51 2 pCi/g 0.44 0.45 0.98 Agreement (Coffee Grounds) Cs-134 2 pCi/g 0.27 0.29 0.94 Agreement Cs-137 2 pCi/g 0.20 0.20 1.00 Agreement Co-58 2 pCi/g 0.22 0.23 0.96 Agreement Mn-54 2 pCi/g 0.21 0.21 1.00 Agreement Fe-59 2 pCi/g 0.20 0.20 1.00 Agreement Zn-65 2 pCi/g 0.45 0.39 1.17 Agreement Co-60 2 pCi/g 0.28 0.28 0.98 Agreement I) NCR# 02045683

2) NCR# 02052857 Section 5 - Page 12

TABLE 5.0-B (Cont.)

En Rad EZA EnRad/EZA Sample Sample ID Nuclide Quarter Units Evaluation Value Value Ratio Gamma in Ell47J*.* Ce-141 1 pCi 80.1 75.6 1.06 Agreement Composite Filter Cr-51 I pCi 213 187 1.14 Agreement Cs-134 1 pCi 102 99.9 1.02 Agreement Cs-137 I pCi 119 124 0.96 Agreement Co-58 I pCi 86.9 90.2 0.96 Agreement Mn-54 I pCi 92.9 89.6 J.04 Agreement Fe-59 I pCi 110 IOI 1.09 Agreement Zn-65 I pCi 139 137 I.01 Agreement Co-60 I pCi 195 187 1.04 Agreement Gamma in Ell590 Ce-141 3 pCi 76.0 70.3 1.08 Agreement Composite Filter Cr-51 3 pCi 183 178 1.03 Agreement3 Cs-134 3 pCi ', 102 102 1.00 Agreement Cs-137 3 pCi 88.3 89.4 0.99 Agreement Co-58 3 pCi 72.1 73.4 0.98 Agreement Mn-54 3 pCi 115 115 1.00 Agreement Fe-59 3 pCi 63.5 68.4 0.93 Agreement Zn-65 3 pCi 143 135 1.06 Agreement Co-60 3 pCi 104 102 1.02 Agreement Gamma in EI 1588 I-131 3 pCi/L 50.3 49.0 1.03 Agreement Water Ce-141 3 pCi/L 89.5 85.2 1.05 Agreement Cr-51 3 pCi/L 230 215 1.07 Agreement Cs-134 3 pCi/L 112 124 0.90 Agreement Cs-137 3 pCi/L. 112 108 1.03 Agreement Co-58 3 pCi/L 88.9 89.0 I.00 Agreement Mn-54 3 pCi/L 149 139 I.07 Agreement Fe-59 3 pCi/L 97.4 82.8 1.18 Agreement4 Zn-65 3 pCi/L 180 163 1.10 Agreement Co-60 3 pCi/L 131 123 1.06 Agreement

3) NCR# 02080821

4) NCR# 02074444 Section 5 - Page 13

TABLE 5.0-B (Cont.)

Sample EnRad EZA EnRad/EZA Sample Nuclide Quaiter Units Evaluation ID Value Value Ratio Gamma in El1589 Ce-141 3 pCi 84.6 72.9 1.16 Agreement Filter Cr-51 3 pCi 209 184 I. I 3 Agreement (Falcon)

Cs-134 3 pCi 123 106 l.16 Agreement Cs-137 3 pCi 99.8 92.7 1.08 Agreement Co-58 3 pCi 75.8 76.1 1.00 Agreement Mn-54 3 pCi 123 I 19 1.03 Agreement Fe-59 3 pCi 79.7 70.9 I. 12 Agreement Zn-65 3 pCi 171 140 1.22 Agreement Co-60 3 pCi I 16 105 I.IO Agreement Gamma in El 1475 1-131 I pCi/L 86.5 82.2 1.05 Agreement Milk Ce-141 I pCi/L IOI 98.4 1.03 Agreement Cr-51 I pCi/L 243 24J 1.00 Agreement Cs-134 Agreement

I pCi/L 121 '* 130 0.93 Cs-137 I pCi/L 175 161 1.09 Agreement Co-58 1 pCi/L 117 117 1.00 Agreement Mn-54 1 pCi/L 127 117 l.09 Agreement Fe-59 I pCi/L 143 131 1.09 Agreement Zn-65 l pCi/L 186 179 1.04 Agreement Co-60 l pCi/L 266 244 1.09 Agreement Gross Am-241 4 pCi/L 135 146 0.92 Agreement Alpha/Beta El 1668 in Water Cs-137 4 pCi/L 270 293 0.92 Agreement LLI-131 in El 1472 1-131 l pCi/L 102 92 1.11 Agreement5 Milk El 1592 1-131 3 pCi/L 82.6 81.5 I.OJ Agreement Tritium in El 1530 H-3 2 pCi/L 12200 12000 1.0 I Agreement

Water Ell666 H-3 4 pCi/L 11900 11900 1.00 Agreement 1-131 111 Ell473 1-131 I pCi 90 89 1.0 I Agreement Charcoal El 1587 1-131 3 pCi 61.9 58.6 1.06 Agreement Cartridge

5) NCR# 02027474 Section 5 - Page 14

TABLE 5.0-C ENVIRONMENTAL RESOURCE ASSOCIATES (ERA)

PROFICIENCY TESTING 2016 Proficiency T~st Results for EnRad Laboratories Notih Carolina Depaiiment of Health and Human Services Laboratory Certification EnRad Laboratories Proficiency test samples are received, prepared, and analyzed in second and fourth quarters of 2016. Results are reported directly to Environmental Resource Associates as described in the instruction package within the study period. Proficiency test data are reported to ERA for evaluation. The acceptance criteria for the program was based on the National Environmental Laboratory Accreditation Conference (NELAC) Field of Proficiency Testing criteria. Fourteen results were reported of which 14 ( 100 % ) met the acceptance criteria. ERA reports proficiency test results to the North Carolina Department of Health and Human Services, North Carolina Public Drinking Water Laboratory Certification Program. This testing is to satisfy the North Carolina state drinking water radiochemistry certification requirements, 1

EnRad ERA Acceptance Sample Sample ID Nuclide Quarter Units Evaluation Value Value Limits Ba-133 2 pCi/L 56.6 58.8 48.7-64.9 Agreement Gamma Cs-134 2 pCi/L 42.8 43.3 34.6-47.6 Agreement Emitters in RAD-105 Cs-137 2 pCi/L 86.3 78.4 70.6-88.9 Agreement Water pCi/L Agreement Co-60 2 IOI 102 91.8-114 Zn-65 2 pCi/L 244 214 193-251 Agreement 1 Ba-133 4 pCi/L 54 54.9 45.4-60.7 Agreement Cs-134 4 pCi/L 77.4 81.8 67.0-90.0 Agreement RAD-107 Cs-137 4 pCi/L 210 210 189-233 Agreement Co-60 4 pCi/L 68.9 64.5 58.0-73.4 Agreement Zn-65 4 -pCi/L 280 245 220-287 Agreement Tritium in RAD-105 H-3 2 pCi/L 7940 7840 6790-8620 Agreement Water RAD-107 H-3 4 pCi/L 9670 9820 8540-10800 Agreement Iodine-131 RAD-105 I-131 2 pCi/L 28.1 26.6 22.1-31.3 Agreement in Water RAD-107 I-131 4 pCi/L 30.7 26.3 21.9-31.0 Agreement2 l) NCR # 02032824

2) NCR# 02081918 Section 5 - Page 15

TABLE 5.0-D 2016 ENVIRONMENTAL DOSIMETER CROSS-CHECK RESULTS Nuclear Technology Services Radiation Dosimetry and Records participates in a quarterly TLD intercomparison program administered by Nuclear Technology Services, Inc. of Roswell, GA. Nuclear 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 reconunended remedial actions and to reduce anomalous errors. Complete documentation of any evaluation will be available and provided to the NRC upon request.

l, lst Quarter 2016 2nd Quarter 2016 TLD Reported Delivered Bias Pass/Fail TLD Reported Delivered Bias Pass/Fail Number (mR) (mR) (%dirt) Criteria Pass/Fail Number (mR) (mR) (% dif!) Criteria Pass/Fail 102234 90.33 88.74 1.79 <+/-15% Pass 103685 16.86 15.90 6.04 <+!-15% Pass 102082 87.38 88.74 -1.53 <+/-15% Pass 103686 17.24 15.90 8.43 <+/-15% Pass 103299 90.78 88.74 2.30 <+/-15% Pass 103704 15.76 15.90 -0.88 <+/-15% Pass 103287 95.55 88.74 7.67 <+/-15% Pass 103705 16.21 15.90 1.95 <+/-15% Pass 103752 92.49 88.74 4.23 <+/-15% Pass 103714 17.45 15.90 9.75 <+/-15% Pass Average Bias (B) 2.89 Average Bias (B) 5.06 Standard Deviation (S) 3.38 Standard Deviation (S) 4.45 Measure Performance IBl+S 6.27 <15% Pass Measure Perfonnance IBl+S 9.51 <15% Pass 3rd Quarter 2016 4th Quarter 2016 TLD Reported Delivered Bias Pass/Fail TLD Reported Delivered Bias Pass/Fail Number (mR) (mR) (% dift) Criteria Pass/Fail Number (mRJ (mR) (%diff) Criteria Pass/Fail 102058 73.65 69.8 5.58 <+/-15% Pass 100527 81.50 75.3 8.23 <+/-15% Pass 103540 76.65 69.8 9.88 <+/-15% Pass 100345 80.56 75.3 6.99 <+/-15% Pass 103523 82.05 69.8 17.62 <+/-15% Fail 1 101386 82.55 75.3 9.63 <+/-15% Pass 100795 74.03 69.8 6.12 <+l-15% Pass 100123 81.17 75.3 7.80 <+/-15% Pass 100355 71.79 69.8 2.91 <+/-15% Pass 103511 87.26 75.3 15.88 <+/-15% Fail 1 Average Bias (B) 8.42 Average Bias (B) 9.71 Standard Deviation (S) 5.71 Standard Deviation (S) 3.58 Measure Performance IBl+S 14.13 <15% Pass Measure Performance IBl+S 13.29 <15% Pass I) NCR# 02106779 generated for 3ru and 4'"Quarter2016 failures Section 5 - Page 16

APPENDIX A ENVIRONMENTAL SAMPLING ANALYSIS PROCEDURES .

Appendix A - Page I

APPENDIX A ENVIRONMENTAL SAMPLING AND ANALYSIS PROCEDURES Adherence to established procedures for sampling and analysis 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 perfonned by EnRad Laboratories, Dosimet1y 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 Telemetric REMP air location equipment monitoring was implemented during 2016 and dual air sampler placement discontinued (NCR# 01993676).

REMP air filter orientation was changed during 2016 by inward facing the scrim side (shiny side or fuzzy side) and outward facing the crosshatch side (dull side or paper side) as indicated by manufacturer recommendation (NCR# 02026783, 02088364).

Eight indicator location TLDs were added to the Oconee REMP with ODCM revision 58 (NCR # 02035669). The sampling procedure was changed in 2016 with programmatic changes implemented in 2017 (ODCM revision 58). Indicator location number, distance/sector, and description are shown.

077 (l.00 miles SW) - Skimmer wall, air monitoring location 078.1 (0.53 miles WSW) - ONS Recreation site, air monitoring location 085 (0.88 miles NNW) - Lake Services Bldg 9125, air monitoring location 0

086 (0.83 miles NW) - Lake Keowee Service Rd at Boat Landing 087 (1.33 miles WNW) - End of Waterfall Road 088 (1.00 SSW) - Doug Hollow Rd I Transmission Tower 089 (1.19 miles S) - Intersection Hwy 130 & Keowee River Road 090 (0.79 miles SE) - Crescent Resources, Keowee River Road at Beaver Darn II. DESCRIPTION OF ANALYSIS PROCEDURES Ganuna spectroscopy analyses are perfo1med using high purity germanium gamma detectors and CanbetTa analytical software. Designated sample volumes are transfetTed to appropriate counting geometries and analyzed by gamma spectroscopy.

Perishable samples such as fish and broadleaf vegetation are ground to achieve a Appendix A - Page 2

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 detennined before being transferred to appropriate counting geometry and analyzed by gamma spectroscopy.

Tritium analyses are perfonned quarterly by using low-level environmental liquid scintillation analysis technique on a Perkin-Elmer 2900TR liquid scintillation system or Perkin-Elmer 31 OOTR liquid scintillation system. Tritium samples are distilled and batch processed with a laboratory fo1iified blank, matrix spike, matrix spike duplicate, and blank to verify instrument perfonnance and sample preparation technique are acceptable.

Gross beta analysis is perfo1111ed 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 OCCUlTed.

III. CHANGE OF ANALYSIS PROCEDURES REMP air filter orientation was changed during 2016 by inward facing the scrim side (shiny side or fuzzy side) and outward facing the crosshatch side (dull side or paper side) as indicated by manufacturer recommendation (NCR # 02026783, 02088364). Calibration standards using the new configuration were implemented during 2016.

IV. SAMPLING AND ANALYSIS PROCEDURES A.1 AIRBORNE PARTICULATE AND RADIOIODINE Airborne paiiiculate 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 collected in a charcoal cartridge positioned behind the filter in the sampler. The samplers are designed to operate at a constant flow rate (in order to compensate for any filter loading) and are set to sample approximately 2 cubic feet per minute. Filters and cartridges were collected weekly. A separate weekly gamma analysis was perfonned on each charcoal cartridge. A weekly gross beta analysis was perfonned on each filter. A quarterly gaimna analysis was perfonned 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 078.1 = Recreation Site (0.53 mi. WSW)

Location 079 = Keowee Dam (0.56 mi. NE)

Appendix A - Page 3

Location 081 =Clemson Operations Center (9.33 mi. SE)(Control)

Location 084 =Sue Craig Road (2.58 mi. NNE)

Location 085 =Lake Services I 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)

A.3 SURFACE WATER Monthly composite samplers were operated to collect an aliquot at least every two hours. Gamma analysis was perfonned on the monthly composites. Tritium analysis was perfonned on the qu~11erly composites sample. The composites were collected monthly from the locations listed below.

Location 062 =Lake Keowee Hydro Intake (0.85 mi. ENE)(Control)

Location 063.1 =Lake Hartwell Hwy 183 Bridge (0.79 mi. E)

A.4 MILK 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 perfonned on each sample. The biweekly grab samples were collected from the location listed below.

Location 071 =Clemson Dairy (10.2 mi. SSE)(Control)

A.5 BROADLEAF VEGETATION Monthly samples were collected and a gamma analysis was perf01med on each sample. The samples were collected from the locations listed below.

Location 077 =Skimmer Wall (1.00 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)

Appendix A - Page 4

A.6 FISH Semiannual samples were collected and a garmna analysis was perfo1med 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 perf01111ed on each sample following the drying and removal of rocks and clams. The samples were collected from the locations listed below.

Location 063 =Lake Haitwell Hwy 183 Bridge (0.80 mi. ESE)

Location 067 =Lawrence Ramsey Bridge Hwy 27 (4.34 mi. SSE)

Location 068 = High Falls County Park (1.82 mi. W)(Control)

A.8 DIRECT GAMMA RADIATION (TLD)

Thennoluminescent dosimeters (TLD) were collected quaiterly at fifty locations.

A gamma exposure rate was detennined for each TLD. The TLDs were placed as indicated below.

An inner ring of 17 TLDs, one in each meteorological sector in the general area of the site boundary.

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

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

TLD Locations are listed in Table 2.1-B.

A.9 ANNUAL LAND USE CENSUS An annual Land Use Census 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 Neai*est Milk-giving Animal (cow, goat, etc.) where milk is used for human consumption Appendix A - Page 5

The census was conducted during the growing season 5/18 - 51l912016. Results are shown in Table 3.9. No changes were made to the sampling procedures during 2016 as a result of the 2016 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 (NAD) 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 6

APPENDIXB RADIOLOGICAL ENVIRONMENTAL MONITORING

" PROGRAM -,

SUMMARY

OF RESULTS Appendix B - Page I

OCONEE NUCLEAR STATION RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM DATA

SUMMARY

Oconee Nuclear Station Docket Numbers 50-269, 270, 287 Oconee County, South Carolina Calendar Year 2016 Location w/Highest Annual Mean Medium or Pathway Type and Lower Limit All Indicator Control Locations No. of Sampled or Measured Total No. of of Detection Loca tions 121 <3J Name, Distance, Mean Mean Non-Routine (Unit of Measurement) Measurements (LLD)< 1> Mean and Direction Range<2> <3 > Range< 2><3 > Report Performed Range Meas.

081 (9.33 mi SE)

Air Particulate Gross Beta 2.23E-2 (260/260) 2.37E-2 (52/52) 2. I 7E-2 (52/52) 0 See Table 2.2-C 077 (pCi/m 3 ) 312<4 > 8.51 E 5.59E-2 (1.00 mi SW) 1.11 E 4.53E-2 9.83E 4.26E-2

- 0 Gamma See Table 2.2-C All less than LLD ----- ----- All less than LLD 24 Air Radioiodine 0 Gamma Set: Table 2.2-C All less than LLD ----- ----- All less than LLD (pCi/m 3 ) 312< 4 >

064 (6.67 mi SSW)

Drinking Water Gross Beta 4 1.28 (20/26) 066 1.44 ( 10/13) 1.15(11/13) 0 (pCi/I) 39 0.59-2.24 ( 18.9 mi SSE) 0.60-2.24 0.78 - 1.82 Gamma See Table 2.2-C All less than LLD .......... ----- All less than LLD 0 39 Tritium 317 (4/8) 066 317(4/4) All less than LLD 0 2000 12 295 - 368 ( 18.9 mi SSE) 295 - 368 Surface Water Gamma See Table 2.2-C All less than LLD ----- ----- All less than LLD 0 (pCi/I) 26 Tritium 2000 4285 (4/4) 063.1 4285 (4/4) All Jess than LLD 0.

8 3380-4710 (0.79 mi E) 3380-4710

Milk (pCi/l)

Gamma 26 Sec Table 2.2-C No Indicator Location ----- ----- All less than LLD 0

1-131 Sec Table 2.2-C No Indicator Location

----- All less than LLD 0 26 Appendix B - Page 2

OCONEE NUCLEAR STATION RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM DATA

SUMMARY

Oconee Nuclear Station Docket Numbers 50-269, 270, 287 Oconee County. South Carolina - Calendar Year 2016 Location w/Highest Annual Mean Medium or Pathway Type and Lower Limit All Indicator Control Locations No. of Sampled or Measured Total No. of of Detection Locations! 2l <3l Name, Distance, Mean Mean Non-Routine (Unit of Measurement) Measurements (LLD)< 1l Mean and Direction Range<2><3> Range<2><3> Report Performed Range Meas.

Broad kaf Vegetation Gamma See Table 2.2-C All less than LLD ----- .......... All less than LLD 0 (pCi/kg, wet) 48

~

Fish Gamma See Table 2.2-C .. 060 (2.28 mi NE) 0 (pCi/kg, wet) 12 21.1 (3/8) 063 27.4 ( 1/4) 13.1(1/4)

Cs-137 150 11.8 - 27.4 (0.8 mi ESE) 27.4-27.4 13.1-13.1 Sediments--Shoreline Gamma See Table 2.2-C 0 All less than LLD (pCi/kg, dry) 6 136 (2/4) 067 136 (2/2)

Cs-137 180 18.9-254 (4.34 mi SSE) 18.9-254 058 (9.39 mi WSW)

TLD 21.6 (191/191) 27.9 (4/4) 081 (9.33 mi SE) 0 TLD Readout 024 (mR per quarter) <5> 199< 4 > ----- 12.6-31.1 25.3 - 31.1 27.8 (8/8)

(0.81 mi E) 20.7-35.9 Appendix B - Page 3 **

Footnotes to Appendix B

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

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

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

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

5. TLD exposure is reported in milliroentgen (mR) per standard quarter (9 I days).

Appendix B - Page 4

APPENDIXC SAMPLING DEVIATIONS UNAVAIL,ABLE ANALYSES Appendix C - Page 1

APPENDIXC OCONEE NUCLEAR STATION SAMPLING DEVIATIONS & UNAVAILABLE ANALYSES DEVIATION & UNAVAILABLE REASON CODES BF Blown Fuse PM Preventive Maintenance CN Construction PO Power Outage PZ Sample Frozen PS Pump out of service I Undergoing repair IV Insufficient Volume SL Sample Loss/Lost due to Lab Accident IW Inclement Weather SM Motor I Rotor Seized LC Line Clog to Sampler SU Seasonally Unavailable OT Other TF Torn Filter PI Power Interrupt VN Vandalism C.1 SAMPLING DEVIATIONS Air Particulate and Air Radioiodinc REMP weekly air samples (Air Particulate (AP) or Air Radioiodine (AR)) that experience any downtime during a surveillance period are repo1ied 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 air samplers operated for a total of 99.8% availability in 2016. .

Scheduled Description & Corrective Location Collection Dates Code Action to Prevent Recurrence Action 085 2/22 - 2/29/2016 PI 2.41 hours4.74537e-4 days 0.0114 hours 6.779101e-5 weeks 1.56005e-5 months downtime due to severe thunderstorm. NCR# 02006841 077 5/16 - 5/23/2016 PI 3.03 hours3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months downtime due to severe thunderstonn. NCR# 02032753 078.1 5/16- 5/23/2016 PI 3.02 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months downtime due to severe thunderstorm. NCR# 02032754 077 6/13 - 612012016 PI 1.78 hours9.027778e-4 days 0.0217 hours 1.289683e-4 weeks 2.9679e-5 months downtime, cause unknown. NCR# 02040542 078.1 6/13 - 6/20/2016 PI 0.67 hours7.75463e-4 days 0.0186 hours 1.107804e-4 weeks 2.54935e-5 months downtime, cause unknown. NCR# 02040544 078.1 6/27 - 7/5/2016 Pl 107 hours0.00124 days 0.0297 hours 1.76918e-4 weeks 4.07135e-5 months downtime due to severe thunderstonn. NCR# 02043745 081 7/5 - 7/11/2016 PI 2.60 hours6.944444e-4 days 0.0167 hours 9.920635e-5 weeks 2.283e-5 months downtime due to severe thunderstorm. NCR# 02045193 077 11/28- 12/5/2016 PI , 3.27 hours3.125e-4 days 0.0075 hours 4.464286e-5 weeks 1.02735e-5 months downtime due to loss of retail power. NCR# 02083974 078.1 11/28-12/5/2016 PI 3 .29 hours3.356481e-4 days 0.00806 hours 4.794974e-5 weeks 1.10345e-5 months downtime due to loss of retail power. NCR# 02083974 079 11/28 - 12/5/2016 PI 1.23 hours2.662037e-4 days 0.00639 hours 3.80291e-5 weeks 8.7515e-6 months downtime due to loss ofretail power. NCR# 02083974 077 12/5 - 12/12/2016 Pl 0.14 hours1.62037e-4 days 0.00389 hours 2.314815e-5 weeks 5.327e-6 months downtime due to loss ofretail power. NCR# 02086137 078.1 12/5 - 12112/2016 PI 0.12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months downtime due to loss of retail power. NCR# 02086138 Appendix C - Page 2

Drinking Water and Surface Water REMP monthly drinking water samples (Drinking Water (OW)) 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 of99.9% availability in 2016. There were no drinking water or surface water sampling deviations or unavailable drinking water or surface water samples duri11g 20 l 6.

Scheduled Description & Corrective Location Collection Dates Code Action to Prevent Recurrence Action Reservoir pump was found out of service 3/28/2016 due to tripped breaker. Available composite was collected, a grab sample was taken. Work request 20027395 was 2/29 - 3/28/2016 initiated. Breaker repaired and pump returned to 063 3/28 - 412512016 Pl service, estimated downtime of 2 clays. NCR# 02014969 C.2 UNAVAILABLE ANALYSES TLD Scheclulecl Description & Corrective Location Collection Dates Code Action to Prevent Recurrence Action 059 I 6/14-9/13/2016 I VN I TLDmissingattimeofcollection. I NCR# 02062223 Appendix C - Page 3

APPENDIXD ANALYTICAL DEVIATIONS No Analytical deviations were incurred for the 2016 Radiological Environmental Monitoring Program Appendix D - Page I

APPENDIXE RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM RESULTS ,

2016 This appendix includes sample analysis repmi summaries and supportive data generated from each sample medium for 2016.

Appendix E - Page l

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 Sample Point 077 [.INDICATOR - SW@ 1 miles ]

Sample ID: 398716 Sample Dates: 12/28/2015 -1/5/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.04E-02 2.43E-03 2.15E-03 Sample ID: 398980 Sample Dates: 1/5/2016 -1/11/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.11E-02 2.64E-03 3.38E-03 Sample ID: 399287 Sample Dates: 1/11/2016 -1/18/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.71E-02 3.00E-03 2.62E-03 Sample ID: 400028 Sample Dates: 1/18/2016 - 1/25/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.60E-02 2.53E-03 2.68E-03 Sample ID: 400390 Sample Dates: 1/25/2016 -2/1/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.29E-02 2.89E-03 2.90E-03 Sample ID: 401028 Sample Dates: 2/1/2016 - 2/8/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.84E-02 2.65E-03 2.70E-03 Sample ID: 401382 Sample Dates: 2/8/2016 -2/15/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.79E-02 2.65E-03 2.74E-03 Sample ID: 401827 Sample Dates: 2/15/2016 - 2/22/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.36E-02 2.39E-03 2.68E-03 Sample ID: 402348 Sample Dates: 2/22/2016 - 2/29/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.47E-02 2.43E-03 2.62E-03 Sample ID: 403072 Sample Dates: 2/29/2016 - 3/7/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.52E-02 2.61E-03 3.04E-03 Sample ID: 404563 Sample Dates: 3/7/2016 - 3/14/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.55E-02 2.65E-03 3.12E-03 Sample ID: 405430 1

Sample Dates: 3/14/201 6 -3/21/2016 Nuclide Activity '

2 Sigma Error MDA Beta 2.35E-02 2.97E-03 3.03E-03 Sample ID: 406061 Sample Dates: 3/21/2016 -3/28/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.92E-02 2.73E-03 2.85E-03 Sample ID: 406420 Sample Dates: 12/28/2015 - 3/28/2016 Nuclide Activity 2 Sigma Error MDA Cs-134 <6.54E-04 O.OOE+OO 6.54E-04 Cs-137 <2.90E-04 0.00E+OO 2.90E-04 Be-7 1.57E-01 2.48E-02 1.23E-02 K-40 <1.19E-02 O.OOE+OO 1.19E-02 Sample ID: 406414 Sample Dates: 3/28/2016 - 4/4/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.90E-02 2.72E-03 2.88E-03 Sample ID: 407594 Sample Dates: 4/4/2016 -4/11/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.68E-02 2.66E-03 2.93E-03 Sample ID: 408155 Sample Dates: 4/11/2016 -4/18/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.86E-02 2.67E-03 2.77E-03 Sample ID: 409477 Sample Dates: 4/18/2016 - 4/25/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.51E-02 .2.92E-03 2.58E-03 Sample ID: 409809 Sample Dates: 4/25/2016 - 5/2/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.24E-02 2.83E-03 2.68E-03

\

Sample ID: 410983 Sample Dates: 5/2/2016 - 5/9/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.87E-02 2.61 E-03 2.52E-03 Sample ID: 411455 Sample Dates: 5/9/2016 - 5/16/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.28E-02 2.89E-03 2.76E-03 Sample ID: 411788 Sample Dates: 5/16/2016 - 5/23/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.90E-02 2.71 E-03 2.79E-03 Sample ID: 412248 Sample Dates: 5/23/2016 -5/31/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.75E-02 2.93E-03 2.70E-03 Sample ID: 412766 Sample Dates: 5/31/2016 - 6/6/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.47E-02 3.22E-03 3.07E-03 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 2 of 91 Duke Energy Annual Report -Appendix E En:==-> 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E).

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 Sample Poinf077 [INDICATOR- SW@ 1 miles]

Sample ID: 413381 Sample Dates: *6/6/2016 - 6/13/2016 Nuclide Activity i Sigma Error MDA Beta 2.57E-02 3.00E-03 2.71 E-03 Sample ID: 413917 Sample Dates: 6/13/2016 - 6/20/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.68E-02 3.11 E-03 2.97E-03 Sample ID: 415055 Sample Dates: 6/20/2016 - 6/27/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.54E-02 2.99E-03 2.72E-03 Sample ID: 415456 Sample Dates: 3/28/2016 - 6/27/2016 Nuclide Activity 2 Sigma Error MDA Cs-134 <5.62E-04 0.00E+OO 5.62E-04 Cs-137 <6.89E-04 O.OOE+OO 6.89E-04 Be-7 2.17E-01 3.05E-02 1.15E-02 K-40 <1.41E-02 O.OOE+OO 1.41 E-02 Sample ID: 415450 Sample Dates: 6/27/2016 -7/5/2016 Nuclide Activity 2 Sigma Error MDA Beta 3.12E-02 2.92E-03 2.17E-03 Sample ID: 416433 Sample Dates: 7/5/2016 -7/1112016 Nuclide Activity 2 Sigma Error MDA Beta 1.86E-02 3.02E-03 3.32E-03 Sample ID: 417046 Sample Dates: 7/1112016 - 7/18/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.05E-02 2.81 E-03 2.88E-03 Sample ID: 417437 Sample Dates: 7/18/2016 - 7/25/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.70E-02 3.10E-03 2.88E-03 Sample ID: 417830 Sample Dates: 7/25/2016 - 8/1/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.24E-02 2.90E-03 2.86E-03 Sample ID: 418306 Sample Dates: 8/1/2016 - 8/8/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.99E-02 2.78E-03 2;89E-03 Sample ID: 419024 Sample Dates: 8/8/2016 - 8/15/2016* Nuclide Activity 2 Sigma Error

' MDA Beta 1.15E-02 2.33E-03 2.81 E-03 Sample ID: 419522 Sample Dates: 8/15/2016 - 8/22/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.43E-02 2.57E-03 3.01 E-03 Sample ID: 420051 Sample Dates: 8/22/2016 - 8/29/2016 Nuclide Activity 2 Sigma Error MDA Beta 3.09E-02 3.25E-03 2.87E-03 Sample ID: 420597 Sample Dates: 8/29/2016 - 9/6/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.89E-02 2.89E-03 2.44E-03 Sample ID: 421463 Sample Dates: 9/6/2016 - 9/12/2016 Nuclide Activity 2 Sigma Error MDA Beta 3.84E-02 3.91 E-03 3.51E-03 Sample ID: 422599 Sample Dates: 9/12/2016 - 9/19/2016 Nuclide Activity 2 Sigma Error MDA Beta

2.95E-02 3.18E-03 2.79E-03 Sample ID: 423342 Sample Dates: 9/19/2016 ~ 9/26/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.66E-02 3.02E-03 2.67E-03 Sample ID: 424482 Sample Dates: 6/27/2016 -9/26/2016 Nuclide Activity 2 Sigma Error MDA Cs-134 <4.63E-04* O.OOE+OO 4.63E-04 Cs-137 <2.90E-04 O.OOE+OO 2.90E-04 Be-7 1.71 E-01 2.57E-02 8.23E-03 K-40 <1.46E-02 O.OOE+OO 1.46E-02 Sample ID: 424476 Sample Dates: 9/26/2016 - 10/3/2016 Nuclide Activity 2 Sigma Error MDA Beta 3.12E-02 3.26E-03 2.85E-03 Sample ID: 425478 Sample Dates: 10/3/2016 -10/10/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.30E-02 2.88E-03 2.85E-03 Sample ID: 426020 Sample Dates: 10/10/2016 -10/17/2016 Nuclide Activity 2 Sigma Error MDA Beta 3.39E-02 3.41E-03 2.90E-03 Sample ID: 426389 Sample Dates: 10/17/2016 - 10/24/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.32E-02 2.93E-03 2.86E-03 Sample ID: 427073 Sample Dates: 10/24/2016 -10/31/2016 Nuclide Activity 2 Sigma Error MDA Beta 4.53E-02 3.72E-03 2.54E-03 Report Generated@ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 3 of 91 Duke Energy Annual Report - Appendix E En]) 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 Sample Point 077 [INDICATOR - SW@ 1 miles]

Sample ID: 427741 Sample Dates: 10/31/2016 -11/7/2016 Nuclide Activity 2 Sigma Error MDA Beta 4.27E-02 3.59E-03 2.54E-03 Sample ID: 428241 Sample Dates: 11/7/2016 -11/14/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.34E-02 2.43E-03 2.76E-03 Sample ID: 428917 Sample Dates: 11/14/2016 -11/21/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.39E-02 4.01E-03 4.49E-03 Sample ID: 429419 Sample Dates: 11/21/2016 -11/28/2016 Nuclide Activity 2 Sigma Error MDA Beta 3.27E-02 3.34E-03 2.88E-03 Sample ID: 429979 Sample Dates: 11128/2016 - 12/5/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.33E-02 2.98E-03 2.99E-03 Sample ID: 430605 Sample Dates: 12/5/2016 - 12/12/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.29E-02 2.81 E-03 2.63E-03 Sample ID: 431087 Sample bates: 12/12/2016 -12/19/2016 Nuclide Activity 2 Sigma Error MDA Beta 3.00E-02 3.48E-03 2.94E-03 Sample ID: 431487 Sample Dates: 12/19/2016 -12/27/2016 Nuclide Activity 2 Sigma Error MDA Beta 4.06E-02 3.67E-03 2.87E-03 Sample ID: 431839 Sample Dates: 9/26/2016 -12/27/2016 Nuclide Activity 2 Sigma Error MDA Cs-134 <5.79E-04 0.00E+OO 5.79E-04 Cs-137 <5.68E-04 O.OOE+OO 5.68E-04 Be-7 1.54E-01 2.39E-02 1.23E-02 K-40 <1.02E-02 O.OOE+OO 1.02E-02 Sample Point 078.1 [INDICATOR - WSW@0.53 miles]

Sample ID: 398717 Sample Dates: 12/28/2015 - 1"/5/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.00E-02 2.41E-03 2.15E-03 Sample ID: 398981 Sample Dates: 1/5/2016 -1/11/2016 Nuclide Activity 2 Sigma Error MDA Beta 8.9BE-03 2.51 E-03 3.38E-03 Sample ID: 399288 Sample Dates: 1/11 /2016 - 1/18/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.92E-02 2.64E-03 2.62E-03 Sample ID: 400029 Sample Dates: 1/18/2016 -1/25/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.53E-02 2.49E-03 2.68E-03 Sample ID: 400391 Sample Dates: 1/25/2016 - 2/1/2016 Nuclide *Activity 2 Sigma Error MDA Beta 2.13E-02 2.82E-03 2.90E-03 Sample ID: 401029 Sample Dates: 2/1/2016 -2/8/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.83E-02 2.65E-03 2.70E-03 Sample ID: 401383 Sample Dates: 2/8/2016 - 2/15/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.71E-02 2.61 E-03 2.74E-03 Sample ID: 401828 Sample Dates: 2/15/2016 - 2/22/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.29E-02 2.35E-03 2.68E-03 Sample ID: 402349 Sample Dates: 2/22/2016 - 2/29/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.52E-02 2.45E-03 2.63E-03 Sample ID: 403073 Sample Dates: 2/29/2016 - 317/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.48E-02 2.59E-03 3.04E-03 Sample ID: 404564 Sample Dates: 3/7/2016 - 3/14/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.82E-02 2.77E-03 3.12E-03 Sample ID: 405431 Sample Dates: 3/14/2016 - 3/21/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.86E-02 2.76E-03 3.03E-03 Sample ID: 406062 Sample Dates: 3/21/2016 - 3/28/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.99E-02 2.76E-03 2.85E-03 Sample ID: 406421 Sample Dates: 12/28/2015 - 3/28/2016 Nuclide Activity 2 Sigma Error MDA Cs-134 <5.61E-04 O.OOE+OO 5.61 E-04 Cs-137 <6.87E-04 O.OOE+OO 6.87E-04 Be-7. 1.27E-01 2.21E-02 1.43E-02 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 4 of 91 Duke Energy Annual Report -Appendix E En-~ 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 Sample Point 078.1 [INDICATOR - WsW@ 0.53 miles]

Sample ID: 406421 Sample Dates: 1212812015 -312812016 Nuclide Activity 2 Sigma Error MDA.

K-40 8.85E-03 6.24E-03 7.85E-03 Sample ID: 406415 Sample Dates: 3128/2016 - 4/4/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.95E-02 2.75E-03 2.87E-03 Sample ID: 407595 Sample Dates: 41412016 -411112016 Nuclide Activity 2 Sigma Error MDA Beta 1.40E-02 2.52E-03 2.94E-03 Sample ID: 408156 Sample Dates: 4/11/2016 -4118/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.12E-02 2.79E-03 2.76E-03 Sample ID: 409478 Sample Dates: 4/1812016 - 4/2512016 Nuclide Activity 2 Sigma Error MDA Beta 2.46E-02 2.90E-03 2.59E-03 Sample ID: 409810 Sample Dates: 412512016 - 51212016 Nuclide Activity 2 Sigma Error MDA Beta 2.12E-02 2.77E-03 2.68E-03 Sample ID: 410984 Sample Dates: 512/2016 - 5/9/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.67E-02 2.51 E-03 2.52E-03 Sample ID: 411456 Sample Dates: 51912016 - 5/16/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.14E-02 2.83E-03 2.76E-03 Sample ID: 411789 Sample Dates: 5/16/2016 - 5/23/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.60E-02 2.56E-03 2.79E-03 Sample ID: 412249 Sample Dates: 5/23/2016 -5/31/2016 Nuclide Activity . 2 Sigma Error MDA Beta 2.75E-02 2.94E-03 2.71 E-03 Sample ID: 412767 Sample Dates: 5/31/2016 - 6/6/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.17E-D2 3.08E-03 3.D7E-03 Sample ID: '413382 Sample Dates: 6/6/2016 - 6/13/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.14E-02 2.81 E-03 2.71E-03 Sample ID: 413918 Sample Dates: 6/13/2016 - 6/20/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.28E-02 2.93E-03 2.95E-03 Sample ID: 415056 Sample Dates: 6/20/2016 - 6/27/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.56E-02 3.00E-03 2.72E-03 Sample ID: 415457 Sample Dates: 3/2812016 - 6/2712016 Nuclide Activity 2 Sigma Error MDA Cs-134 <5.38E-04 O.OOE+OO 5.38E-04 Cs-137 <2.91E-04 O.OOE+OO 2.91 E-04 Be-7 2.12E-01 3.00E-02 9.23E-03 K-40 <1.09E-02 O.OOE+OO 1.09E-02 Sample ID: 415451 Sample Dates: 6/27/2016 *- 7/5/2016 Nuclide Activity 2 Sigma Error MDA Beta 5.59E-02 9.31 E-03 9.79E-03 Sample ID: 416434 Sample Dates: 7/5/2016 - 7/11/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.61E-02 2.89E-03 3.32E-03 Sample ID: 417047 Sample Dates: 7/11/2016 -7/18/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.89E-02 2.74E-03 2.BBE-03 Sample ID: 417438 Sample Dates: 7/18/2016 -7/25/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.65E-02 3.07E-03 2.88E-03 Sample ID: 417831 Sample Dates: 7/25/2016 -8/1/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.88E-02 2.73E-03 2.86E-03 Sample ID: 418307 Sample Dates: 8/112016 - 8/8/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.06E-02 2.81 E-03 2.89E-03 Sample ID: 419025 Sample Dates: 8/8/2016 - 8/15/2016 Nuclide Activity 2 Sigma Error MDA Beta 9.85E-03 2.23E-03 2.81E-03 Sample ID: 419523 Sample Dates: 8/15/2016 - 8/22/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.09E-02 2.39E-03 3.01E-03 Sample ID: 420052 Sample Dates: 8/22/2016 - 8/29/2016 Nuclide Activity .2 Sigma Error MDA Beta 2.55E-02 3.03E-03 2.87E-03 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 5 of 91 Duke Energy Annual Report -Appendix E En~ 13339 Hagers Ferry Road Huntersville, North Carolina 28078

_OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 Sample Point 078.1 [INDICATOR* WSW@ 0.53.miles]

Sample ID: 420598 Sample Dates: 8/29/2016 - 9/6/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.92E-02 2.91 E-03 2.44E-03 Sample ID: 421464 Sample Dates: 9/6/2016 - 9/12/2016 Nuclide Activity 2 Sigma Error MDA Beta 3.59E-02 3.82E-03 3.51E-03 Sample ID: 422600 Sample Dates: 9/12/2016 - 9/19/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.47E-02 2.98E-03 2.79E-03 Sample ID: 423343 Sample Dates: 9/19/2016 - 9/26/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.50E-02 2.95E-03 2.67E-03 Sample ID: 424483 Sample Dates: 6/27/2016 - 9/26/2016 Nuclide Activity 2 Sigma Error MDA Cs-134 <1.51 E-04 0.00E+OO 1.51 E-04 Cs-137 <6.24E-04 O.OOE+OO 6.24E-04 Be-7 1.61 E-01 2.57E-02 1.31 E-02 K-40 <1.55E-02 O.OOE+OO 1.55E-02 Sample ID: 424477 Sample Dates: 912612016 - 101312016 Nuclide Activity 2 Sigma Error MDA Beta 2.97E-02 3.20E-03 2.85E-03 Sample ID: 425479 Sample Dates: 10/3/2016 -10/10/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.09E-02 2.82E-03 2.89E-03 Sample ID: 426021 Sample Dates: 10/10/2016 -10/17/2016 Nuclide Activity 2 Sigma Error MDA Beta 3.09E-02 3.26E-03 2.86E-03 Sample ID: 426390 Sample Dates: 10/17/2016 -10/24/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.06E-02 2.81 E-03 2.86E-03 Sample ID: 427074 Sample Dates: 10/24/2016 -10/31/2016 Nuclide Activity 2 Sigma Error MDA Beta 4.24E-02 3.62E-03 2.54E-03 Sample ID: 427742 Sample Dates: 10/31/2016 -11/7/2016 '

Nuclide Activity 2 Sigma Error MDA Beta 4.19E-02 3.57E-03 2.54E-03 Sample ID: 428242 Sample Dates: 11/7/2016 -11/14/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.54E-02 2.54E-03 2.75E-03 Sample ID: 428918 Sample Dates: 11 /14/2016 - 11 /21/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.65E-D2 4.15E-03 4.50E-03 Sample ID: 429420 Sample Dates: 11/21/2016 -11/28/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.50E-02 3.02E-03 2.88E-03 Sample ID: 429980 Sample Dates: 11 /28/2016 - 12/5/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.88E-02 2.78E-03 2.99E-03 Sample ID: 430606 Sample Dates: 12/5/2016 -12/12/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.09E-02 2.72E-03 2.63E-03 Sample ID: 431088 Sample Dates: 12/12/2016 -12/19/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.11 E-02 3.06E-03 2.94E-03 Sample ID: 431488 Sample Dates: 12/19/2016 -12/27/2016 Nuclide Activity 2 Sigma Error MDA Beta 3.60E-02 3.50E-03 2.87E-03 Sample ID: 431840 Sample Dates: 9/26/2016 -12/27/2016 Nuclide Activity 2 Sigma Error MDA Cs-134 <5.75E-04 O.OOE+OO 5.75E-04 Cs-137 <5.94E-04 O.OOE+OO 5.94E-04 Be-7 1.13E-01 2.13E-02 1.53E-02 K-40 9.39E-03 5.87E-03 6.09E-03 Sample Point 079 [ INDICATOR - NE @ 0.56 miles]

Sample ID: 398718 Sample Dates: 12/28/2015 - 1/5/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.75E-02 2.29E-03 2.14E-03 Sample ID: 398982 Sample Dates: 1/5/2016 -1/11/2016 Nuclide Activity 2 Sigma Error MDA Beta 9.65E-03 2.57E-03 3.40E-03 Sample ID: 399289 Sample Dates: 1/11/2016-1/18/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.19E-02 2.77E-03 2.61E-03 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 6 of 91 Duke Energy Annual Report-Appendix E En~ 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE.Radiological Environmental Monitoring Analysis Report.- 2016 (Appendix E)

Media Type: AIR PARTICULATE Concentration {Activity): pCi/m3 Sample Point 079 [ INDICATOR - NE@ 0.56 miles]

Sample ID: 400030 Sample Dates: 1/18/2016 -1/25/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.68E-02 2.58E-03 2.69E-03 Sample ID: 400392 Sample Dates: 1/25/2016 - 2/1 /2016 Nuclide Activity 2 Sigma Error MDA Beta 2.09E-02 2.80E-03 2.89E-03 Sample ID: 401030 Sample Dates: 2/1/2016 - 2/8/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.53E-02 2.50E-03 2.71E-03 Sample ID: 401384 Sample Dates: 2/8/2016 - 2/15/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.12E-02 2.80E-03 2.74E-03 Sample ID: 401829 Sample Dates: 2/15/2016 -2/22/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.21 E-02 2.31E-03 2.69E-03 Sample ID: 402350 Sample Dates: 2/22/2016 - 2/29/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.45E-02 2.42E-03 2.62E-03 Sample ID: 403074 Sample Dates: 2/29/2016 - 3/7/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.60E-02 2.65E-03 3.04E-03 Sample ID: 404565 Sample Dates: 3/7/2016 - 3/14/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.46E-02 2.61E-03 3.12E-03 Sample ID: 405432 Sample Dates: 3/14/2016 - 3/21/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.91E-02 2.78E-03 3.03E-03 Sample ID: 406063 Sample Dates: 3/21/2016 -3/28/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.05E-02 2.78E-03 2.85E-03 Sample ID: 406422 Sample Dates: 12/28/2015 - 3/28/2016 Nuclide Activity 2 Sigma Error MDA Cs-134 <3.46E-04 O.OOE+OO 3.46E-04 Cs-137 <4.45E-04 O.OOE+OO 4.45E-04 Be-7 1.41 E~01 2.22E-02 1.24E-02 K-40 <1.21E-02 O.OOE+OO 1.21 E-02 Sample ID: 406416 Sample Dates: 3/28/2016 - 4/4/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.81 E-02 2.67E-03 2.86E-03 Sample ID: 407596 Sample Dates: 4/4/2016 -4/11/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.46E-02 2.57E-03 2.96E-03 Sample ID: 408157 Sample Dates: 4/11/2016 -4/18/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.92E-02 2.70E-03 2.76E-03 Sample ID: 409479 Sample Dates: 4/18/2016 - 4/25/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.27E-02 2.81 E-03 2.58E-03 Sample ID: 409811 Sample Dates: 4/25/2016 - 5/2/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.00E-02 2.73E-03 2.69E-03 Sample ID: 410985 Sample Dates: 5/2/2016 - 5/9/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.56E-02 2.44E-03 2.51 E-03 Sample ID: 411457 Sample Dates: 5/9/2016 - 5/16/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.06E-02 2.79E-03 2.76E-03 Sample ID: 411790 Sample Dates: 5/16/2016 - 5/23/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.31 E-02 2.37E-03 2.73E-03 Sample ID: 412250 Sample Dates: 5/23/2016 - 5/31/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.53E-02 2.85E-03 2.72E-03 Sample ID: 412768 Sample Dates: 5/31 /2016 - 6/6/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.86E-02 2.92E-03 3.07E-03 Sample ID: 413383 Sample Dates: 6/6/2016 - 6/13/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.05E-02 2.76E-03 2.72E-03 Sample ID: 413919 Sample Dates: 6/13/2016 - 6/20/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.30E-02 2.92E-03 2.92E-03 Sample ID: 415057 Sample Dates: 6/20/2016 - 6/27/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.63E-02 3.04E-03 2.74E-03 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 7 of 91 Duke Energy Annual Report -Appendix E En:=> 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3

'Sample Point 079 [INDICATOR - NE@ 0.56 miles]

Sample ID: 415458 Sample Dates: 312812016 - 612712016 Nuclide Activity 2 Sigma Error MDA Cs-134 <4.88E-04 O.OOE+OO 4.88E-04 Cs-137 <5.46E-04 O.OOE+OO 5.46E-04 Be-7 1.86E-01 2.84E-02 1.21 E-02 K-40 8.03E-03 4.90E-03 1.98E-03 Sample ID: 415452 Sample Dates: 612712016 - 71512016 Nuclide Activity 2 Sigma Error MDA Beta 2.16E-02 2.51E-03 2.16E-03 Sample ID: 416435 Sample Dates: 71512016 - 7111/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.57E-02 2.BBE-03 3.33E-03 Sample ID: 417048 Sample Dates: 711112016 - 711812016 Nuclide Activity 2 Sigma Error MDA Beta 1.89E-02 2.73E-03 2.87E-03 Sample ID: 417439 Sample Dates: 711812016 -712512016 Nuclide Activity 2 Sigma Error MDA Beta 2.22E-02 2.90E-03 2.89E-03 Sample ID: 417832 Sample Dates: 712512016 - 81112016 Nuclide Activity 2 Sigma Error MDA Beta 1.83E-02 2.70E-03 2.86E-03 Sample ID: 418308 Sample Dates: 81112016 - 81812016 Nuclide Activity 2 Sigma Error MDA Beta 1.90E-02 2.74E-03 2.89E-03 Sample ID: 419026 Sample Dates: 81812016 - 8/1512016 Nuclide Activity 2 Sigma Error MDA Beta 1.02E-02 2.25E-03 2.79E-03 Sample ID: 419524 Sample Dates: 8/1512016 - 812212016 Nuclide Activity 2 Sigma Error MDA Beta 1.10E-02 2.40E-03 3.01E-03 Sample ID: 420053 Sample Dates: 8/2212016 - 8129/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.36E-02 2.96E-03 2.BBE-03 Sample ID: 420599 Sample Dates: 8129/2016 - 9/612016 Nuclide Activity 2 Sigma Error MDA Beta 2.09E-02 2.56E-03 2.44E-03 Sample ID: 421465 Sample Dates: 91612016 - 911212016 Nuclide Activity 2 Sigma Error MDA Beta 3.59E-02 3.80E-03 3.49E-03 Sample ID: 422601 Sample Dates: 911212016 - 911912016 Nuclide Activity 2 Sigma Error MDA Beta 2.64E-02 3.06E-03 2.BOE-03 Sample ID: 423344 Sample Dates: 9/1912016 - 912612016 Nuclide Activity 2 Sigma Error MDA Beta 2.44E-02 2.93E-03 2.67E-03 Sample ID: 424484 Sample Dates: 612712016 - 9/2612016 Nuclide Activity 2 Sigma Error MDA Cs-134 <5.98E-04 O.OOE+OO 5.98E-04 Cs-137 <3.66E-04 O.OOE+OO 3.66E-04 Be-7 1.38E-01 2.22E-02 9.19E-03 K-40 <1.29E-02 O.OOE+OO 1.29E-02 Sample ID: 424478 Sample Dates: 9/2612016 - 10/312016 Nuclide Activity 2 Sigma Error MDA Beta 3.00E-02 3.21E-03 2.85E-03 Sample ID: 425480 Sample Dates: 1013/2016 - 10110/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.12E-02 2.81 E-03 2.86E-03 Sample ID: 426022 Sample Dates: 10/10/2016 -10117/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.68E-02 3.12E-03 2.89E-03 Sample ID: 426391 Sample Dates: 10117/2016 -10124/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.99E-02 2.78E-03 2.87E-03 Sample ID: 427075 Sample Dates: 10/2412016 -10/31/2016 Nuclide Activity 2 Sigma Error MDA Beta 3.84E-02 3.47E-03 2.54E-03 Sample ID: 427743 Sample Dates: 10/31/2016 -11/7/2016 Nuclide Activity 2 Sigma Error MDA Beta 3.96E-02 3.48E-03 2.53E-03 Sample ID: 428243 Sample Dates: 11/7/2016 -11/14/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.76E-02 2.65E-03 2.75E-03 Sample ID: 428919 Sample Dates: 11/14/2016 -11/21/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.92E-02 3.77E-03 4.50E-03 EnRad Laboratories

En :J>

Report Generated @ 4/4/2017 13:40:53 Appendix E - Page 8 of 91 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Envi.ronmental Monitoring Analysis Report - 2016 (Appendix I;:)

Media Type: AIR PARTICULATE Concentration {Activity): pCi/m3

sample Point 079 [INDICATOR - NE@ 0.56 miles]

Sample ID: 429421 Sample Dates:* 11121/2016 -11128/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.90E-02 2.75E-03 2.88E-03 Sample ID: 429981 Sample Dates: 11 /28/2016 - 12/5/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.94E-02 2.78E-03 2.95E-03 Sample ID: 430607 Sample Dates: 12/5/2016 -12/12/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.01E-02 2.69E-03 2.64E-03 Sample ID: 431089 Sample Dates: 12/12/2016 - 12/19/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.47E-02 3.23E-03 2.94E-03 Sample ID: 431489 Sample Dates: 12/19/2016 -12/27/2016 Nuclide Activity 2 Sigma Error MDA Beta 3.78E-02 3.57E-03 2.88E-03 Sample ID: 431841 Sample Dates: 9/26/2016 -12/27/2016 Nuclide Activity 2 Sigma Error MDA Cs-134 <4.70E-04 O.OOE+OO 4.70E-04 Cs-137 <4.29E-04 O.OOE+OO 4.29E-04 Be-7 1.27E-01 2.18E-02 1.11E-02 K-40 <1.32E-02 O.OOE+OO 1.32E-02 Sample Point 081 [CONTROL - SE @ 9.33 miles ]

Sample ID: 398719 Sample Dates: 12/28/2015 - 1/5/2016 N,uclide Activity 2 Sigma Error MDA Beta 1.79E-02 2.32E-03 2.15E-03 Sample ID: 398983 Sample Dates: 1/5/2016 -1/11/2016 Nuclide Activity 2 Sigma Error MDA Beta 9.83E-03 2.56E-03 3.37E-03 Sample ID: 399290 Sample Dates: 1/11/2016 -1/18/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.40E-02 2.88E-03 2.64E-03 Sample ID: 400031 Sample Dates: 1/18/2016 -1/25/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.16E-02 2.28E-03 2.66E-03 Sample ID: 400393 Sample Dates: 1/25/2016 - 2/1 /2016 Nuclide Activity 2 Sigma Error MDA Beta 1.96E-02 2.76E-03 2.92E-03 Sample ID: 401031 Sample Dates: 2/1/2016 - 2/8/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.67E-02 2.56E-03 2.69E-03 Sample ID: 401385 Sample Dates: 2/8/2016 - 2/15/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.71E-02 2.60E-03 2.74E-03 Sample ID: 401830 Sample Dates: 2/15/2016 - 2/22/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.28E-02 2.34E-03 2.68E-03 Sample ID: 402351 Sample Dates: 2/22/2016 - 2/29/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.39E-02 2.39E-03 2.63E-03 Sample ID: 403075 Sample Dates: 2/29/2016 - 3/7 /2016 Nuclide Activity 2 Sigma Error MDA Beta 1.16E-02 2.43E-03 3.04E-03 Sample ID: 404566 Sample Dates: 3/7/2016 - 3/14/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.36E-02 2.57E-03 3.15E-03 Sample ID: 405433 Sample Dates: 3/14/2016 - 3/21/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.92E-02 2.78E-03 3.03E-03 Sample ID: 406064 Sample Dates: 3/21 /2016 - 3/28/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.71E-02 2.62E-03 2.84E-03 Sample ID: 406423 Sample Dates: 12/28/2015 - 3/28/2016 Nuclide Activity 2 Sigma Error MDA Cs-134 <7.22E-04 O.OOE+OO 7.22E-04 Cs-137 <6.62E-04 O.OOE+OO 6.62E-04 Be-7 1.34E-01 2.17E-02 1.31 E-02 K-40 <1.40E-02 O.OOE+OO 1.40E-02 Sample ID: 406417 Sample Dates: 3/28/2016 - 4/4/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.58E-02 2.58E-03 2.90E-03 Sample ID: 407597 Sample Dates: 4/4/2016 -4/11/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.42E-02 2.51E-03 2.90E-03 Report Generated@ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 9 of 91 Duke Energy Annual Report-Appendix E En~ 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environment~! Monitoring Analysis Report - 2016 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 Sample Pofnt 081 [CONTROL - SE @ 9.33 miles ]

Sample ID: 408158 Sample Dates: 4/1112016 "4/18/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.96E-02 2.72E-03 2.77E-03 Sample ID: 409480 Sample Dates: 4/1 B/2016 - 4/25/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.50E-02 2.91 E-03 2.59E-03 Sample ID: 409812 Sample Dates: 4/25/2016 - 5/2/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.99E-02 2.72E-03 2.68E-03 Sample ID: 410986 Sample Dates: 5/2/2016 - 5/9/2016 *Nuclide Activity 2 Sigma Error MDA Beta 1.42E-02 2.37E-03 2.51E-03 Sample ID: 411458 Sample Dates: 5/9/2016 - 5/16/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.06E-02 2.79E-03 2.76E-03 Sample ID: 411791 Sample Dates: 5/16/2016 - 5/23/2016 Nuclide ActiVity 2 Sigma Error MDA Beta 1.61E-02 2.53E-03 2.74E-03 Sample ID: 412251 Sample Dates: 5/23/2016 -5/31/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.22E-02 2.72E-03 2.70E-03 Sample ID: 412769 Sample Dates: 5/3112016 - 6/6/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.94E-02 2.97E-03 3.08E-03 Sample ID: 413384 Sample Dates: 6/6/2016 - 6/13/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.19E-02 2.83E-03 2.71E-03 Sample ID: 413920 Sample Dates: 6/13/2016 - 6/20/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.99E-02 2.BOE-03 2.95E-03 Sample ID: 415058 Sample Dates: 6/20/2016 - 6/27/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.76E-02 3.0BE-03 2.71 E-03

' Sample ID: 415459 Sample Dates: 3/28/2016 - 6/27/2016 Nuclide Activity 2 Sigma Error MDA Cs-134 <6.77E-04 O.OOE+OO 6.77E-04 Cs-137 <4.98E-04 O.OOE+OO 4.98E-04 Be-7 2.0?E-01 2.85E-02 1.31 E-02 K-40 <1.28E-02 0.00E+OO 1.28E-02 Sample ID: 415453 Sample Dates: 6/27/2016 - 7/5/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.68E-02 2.74E-03 2.17E-03 Sample ID: 416436 Sample Dates: 7/5/2016 -7/11/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.58E-02 2.91 E-03 3.37E-03 Sample ID: 417049 Sample Dates: 7/11/2016 - 7/18/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.03E-02 2.BOE-03 2.89E-03 Sample ID: 417440 Sample Dates: 7/18/2016 - 7/25/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.43E-02 2.99E-03 2.89E-03 Sample ID: 417833 Sample Dates: 7/25/2016 - 8/1 /2016 Nuclide Activity 2 Sigma Error MDA Beta 1.63E-02 2.60E-03 2.85E-03 Sample ID: 418309 Sample Dates: 8/1/2016 - 8/8/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.14E-02 2.85E-03 2.89E-03 Sample ID: 419027 Sample Dates: 8/8/2016 - *a/15/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.02E-02 2.26E-03 2.81E-03 Sample ID: 419525 Sample Dates: 8/15/2016 - 8/22/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.11E-02 2.40E-03 3.00E-03 Sample ID: 420054 Sample Dates: 8/22/2016 - 8/29/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.87E-02 3.17E-03 2.B?E-03 Sample ID: 420600 Sample Dates: 8/29/2016 - 9/6/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.66E-02 2.BOE-03 2.44E-03 Sample ID: 421466 Sample Dates: 9/6/2016 - 9/12/2016 Nuclide Activity 2 Sigma Error MDA Beta 4.26E-02 4.07E-03 3.51E-03 Sample ID: 422602 Sample Dates: 9/12/2016 - 9/19/2016 Nuclide Activity 2 Sigma Error MDA Beta 3.29E-02 3.33E-03 2.81E-03 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 10 of 91 Duke Energy Annual Report -Appendix E En:> 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological-Environmental Monitoring Analysis Report- 2016 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 Sample Point 081 [ CO.NTROL - SE@ 9.33 miles] ..

Sample ID: 423345 Sample Dates: 9/19/2016 - 9/26/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.41E-02 2.90E-03 2.65E-03 Sample ID: 424485 Sample Dates: 6/27/2016 - 9/26/2016 Nuclide Activity 2 Sigma Error MDA Cs-134 <3.84E-D4 O.OOE+OO 3.84E-D4 Cs-137 <3.83E-04 O.OOE+OO 3.83E-04 Be-7 1.52E-01 2.46E-02 1.48E-02 K-40 <1.49E-02 O.OOE+OO 1.49E-02 Sample ID: 424479 Sample Dates: 9/26/2016 - 10/3/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.95E-02 3.20E-03 2.86E-03 Sample ID: 425481 Sample Dates: 10/3/2016 -10/10/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.14E-02 2.87E-03 2.93E-03 Sample ID: 426023 Sample Dates: 10/10/2016 -10/17/2016 Nuclide Activity 2 Sigma Error MDA Beta 3.21E-02 3.28E-03 2.81E-03 Sample ID: 426392 Sample Dates: 1011712016 -10124/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.18E-02 2.87E-03 2.86E-03 Sample ID: 427076 Sample Dates: 10/24/2016 -10131/2016 Nuclide Activity 2 Sigma Error MDA Beta 4.25E-02 3.63E-03 2.54E-03 Sample ID: 427744 Sample Dates: 10/31/2016 -11/7/2016 Nuclide Activity 2 Sigma Error MDA Beta 3.96E-D2 3.5DE-03 2.56E-03 Sample ID: 428244 Sample Dates: 1117/2016 -11/14/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.06E-02 2.79E-03 2.74E-03 Sample ID: 428920 Sample Dates: 11114/2016 -11/21/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.68E-02 3.18E-03, 3.74E-03 Sample ID: 429422 Sample Dates: 11/2112016 -11128/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.83E-02 3.15E-03 2.87E-03 Sample ID: 429982 Sample Dates: 11/28/2016 -12/5/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.96E-02 2.79E-03 2.95E-03 Sample ID: 430608 Sample Dates: 12/5/2016 - 12/12/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.97E-02 2.65E-03 2.61E-03 Sample ID: 431090 Sample Dates: 12/12/2016 - 12/19/2016 Nuclide Activity 2 Sigma Error MDA Beta 3.32E-02 3.63E-03 2.95E-03 Sample ID: 431490 Sample Dates: 12/19/2016 -12/27/2016 Nuclide Activity 2 Sigma Error MDA Beta 4.09E-02 3.69E-03 2.87E-03 Sample ID: 431842 Sample Dates: 9/26/2016 - 12/27/2016 Nuclide Activity 2 Sigma Error MDA Cs-134 <5.38E-04 O.OOE+OO 5.38E-04 Cs-137 <4.72E-04 O.OOE+OO 4.72E-04 Be-7 1.29E-01 2.27E-02 1.59E-02 K-40 <1.40E-02 O.OOE+OO 1.4DE-02 Sample Point 084 [ INDICATOR - NNE @ 2.58 miles]

Sa.mple ID: 398720 Sample Dates: 12/28/2015 -1/5/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.90E-02 2.37E-03 2.15E-03 Sample ID: 398984 Sample Dates: 1/5/2016 -1/11/2016 Nuclide Activity 2 Sigma Error MDA Beta 9.38E-03 2.53E-03 3.37E-03 Sample ID: 399291 Sample Dates: 111112016 - 1/18/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.04E-02 2.71E-03 2.63E-03 Sample ID: 400032 Sample Dates: 1118/2016 -1/25/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.85E-02 2.65E-03 2.67E-03 Sample ID: 400394 Sample Dates: 1/25/2016 - 2/1/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.04E-02 2.79E-03 2.90E-03 Sample ID: 401032 Sample Dates: 2/1/2016 -2/8/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.86E-02 2.66E-03 2.69E-03 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 11 of 91 Duke Energy Annual Report -Appendix E En:> 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Ana~ysis Report - 2016 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 Sample Point 084 [INDICATOR- NNE @ 2.58 miles]

Sample ID: 401386 Sample Dates: 2/8/2016 - 2/15/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.77E-02 2.64E-03 2.74E-03 Sample ID: 401831 Sample Dates: 2/15/2016 -2/22/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.66E-02 2.55E-03 2.68E-03 Sample ID: 402352 Sample Dates: 2/22/2016 -2/29/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.53E-02 2.46E-03 2.62E-03 Sample ID: 403076 Sample Dates: 2/29/2016 - 3/7/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.51 E-02 2.61E-03 3.04E-03 Sample ID: 404567 Sample Dates: 3/7/2016 -3/14/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.57E-02 2.66E-03 3.12E-03 Sample ID: 405434 Sample Dates: 3/14/2016 - 3/21/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.91E-02 2.79E-03 3.04E-03 Sample ID: 406065 Sample Dates: 3/21/2016 - 3/28/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.79E-02 2.66E-03 2.85E-03 Sample ID: 406424 Sample Dates: 12/28/2015 - 3/28/2016 Nuclide Activity 2 Sigma Error MDA Cs-134 <5.65E-04 O.OOE+OO 5.65E-04 Cs-137 <4.86E-04 O.OOE+OO 4.86E-04 Be-7 1.43E-01 2.26E-02 1.37E-02 K-40 <1.06E-02 O.OOE+OO 1.06E-02 Sample ID: 406418 Sample Dates: 3/28/2016 -4/4/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.66E-02 2.62E-03 2.90E-03 Sample ID: 407598 Sample Dates: 4/4/2016 -4/11/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.18E-02 2.38E-03 2.90f'-03

(

Sample ID: 408159 Sample Dates: 4/11/2016 -4/18/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.BBE-02 2.68E-03 2.77E-03 Sample ID: 409481 Sample Dates: 4/18/2016 - 4/25/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.49E-02 2.91E-03 2.58E-03 Sample ID: 409813 Sample Dates: 4/25/2016 - 5/2/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.88E-02 2.66E-03 2.68E-03 Sample ID: 410987 Sample Dates: 5/2/2016 - 5/9/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.70E-02 2.52E-03 2.51E-03 Sample ID: 411459 Sample Dates: 5/9/2016 - 5/16/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.01E-02 2.77E-03 2.76E-03 Sample ID: 411792 Sample Dates: 5/16/2016 - 5/23/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.60E-02 2.53E-03 2.75E-03 Sample ID: 412252 Sample Dates: 5/23/2016 -5/31/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.38E-02 2.78E-03 2.70E-03 Sample ID: 412770 Sample Dates: 5/3112016 - 6/6/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.99E-02 2.99E-03 3.0?E-03 Sample ID: 413385 Sample Dates: 6/6/2016 - 6/13/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.39E-02 2.92E-03 2.71E-03 Sample ID: 413921 Sample Dates: 6/13/2016 - 6/20/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.82E-02 3.15E-03 2.94E-03 Sample ID: 415059 Sample Dates: 6/20/2016 - 6/27/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.75E-02 3.0SE-03 2.72E-03 Sample ID: 415460 Sample Dates: 3/28/2016 - 6/27/2016 Nuclide Activity 2 Sigma Error MDA Cs-134 <4.36E-04 O.OOE+OO 4.36E-04 Cs-137 <5.57E-04 O.OOE+OO 5.57E-04 Be-7 1.91E-01 2.66E-02 1.11E-02 K-40 <1.16E-02 O.OOE+OO 1.16E-02 Sample ID: 415454 Sample Dates: 6/27/2016 -7/5/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.S?E-02 2.71E-03 2.17E-03 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 12 of 91 Duke Energy Annual Report -Appendix E En-:=::> 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 Sample Point 084 [INDICATOR - NNE @ 2.58 miles]

Sample ID: 416437 Sample Dates: 7/5/2016 -7/1112016 Nuclide Activity 2 Sigma Error MDA Beta 1.63E-02 2.90E-03 3.32E-03 Sample ID: 417050 Sample Dates: 7/11 /2016 - 7/18/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.92E-02 2.74E-03 2.88E-03 Sample ID: 417441 Sample Dates: 7/18/2016 - 7/25/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.0BE-02 2.81 E-03 2.88E-03 Sample ID: 417834 Sample Dates: 7/25/2016 - 8/1 /2016 Nuclide Activity 2 Sigma Error MDA Beta 2.04E-02 2.81 E-03 2.86E-03 Sample ID: 418310 Sample Dates: 8/1/2016 -8/8/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.24E-02 2.90E-03 2.89E-03 Sample ID: 419028 Sample Dates: 8/8/2016 - 8/15/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.01 E-02 2.25E-03 2.81 E-03 Sample ID: 419526 Sample Dates: 8/15/2016 - 8/22/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.04E-02 2.36E-03 3.01 E-03 Sample ID: 420055 Sample Dates: 8/22/2016 - 8/29/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.62E-02 3.0BE-03 2.87E-03 Sample ID: 420601 Sample Dates: 8/29/2016 - 9/6/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.67E-02 2.81 E-03 2.44E-03 Sample ID: 421467 Sample Dates: 9/6/2016 - 9/12/2016 Nuclide Activity 2 Sigma Error MDA Beta 4.05E-02 3.99E-03 3.51E-03 Sample ID: 422603 Sample Dates: 9/12/2016 - 9/19/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.65E-02 3.0?E-03 2.80E-03 Sample ID: 423346 Sample Dates: 9/19/2016 - 9/26/2016 Nuclide '

Activity 2 Sigma Error MDA Beta 2.15E-02 2.79E-03 2.66E-03 Sample ID: 424486 Sample Dates: 6/27/2016 - 9/26/2016 Nuclide Activity 2 Sigma Error MDA Cs-134 <5.17E-04 0.00E+OO 5.17E-04 Cs-137 <4.09E-04 O.OOE+OO 4.09E-04 Be-7 1.44E-01 2.16E-02 5.82E-03 K-40 6.76E-03 5.71 E-03 7.98E-03 Sample ID: 424480 Sample Dates: 9/26/2016 - 10/3/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.95E-02 3.20E-03 2.86E-03 Sample ID: 425482 Sample Dates: 10/3/2016 -10/10/2016 / Nu.elide Activity 2 Sigma Error MDA Beta 1.82E-02 2.67E-03 2.86E-03 Sample ID: 426024 Sample Dates: 10/10/2016 -10/17/2016 Nuclide Activity 2 Sigma Error MDA Beta 3.03E-02 3.25E-03 2.88E-03 Sample ID: 426393 Sample Dates: 10/17/2016 - 10/24/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.18E-02 2.86E-03 2.86E-03 Sample ID: 427077 Sample Dates: 10/24/2016 -10/31/2016 Nuclide Activity 2 Sigma Error MDA Beta 4.38E-02 3.68E-03 2.54E-03 Sample ID: 427745 Sample Dates: 10/31 /2016 - 11 /7/2016 Nuclide Activity 2 Sigma Error MDA Beta 4.25E-02 3.59E-03 2.54E-03 Sample ID: 428245 Sample Dates: 11/7/2016 -11/14/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.09E-02 2.82E-03 2.75E-03 Sample ID: 428921 Sample Dates: 11/14/2016 -11/21/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.04E-02 3.84E-03 4.49E-03 Sample ID: 429423 Sample Dates: 11/21/2016 -11128/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.16E-02 3.49E-03 3.84E-03 Sample ID: 429983 Sample Dates: 11 /28/2016 - 12/5/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.33E-02 2.94E-03 2.93E-03 Sample ID: 430609 Sample Dates: 12/5/2016 -12/12/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.00E-02 2.68E-03 2.63E-03 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 13 of 91 Duke Energy Annual Report - Appendix E En =2> 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 Sample Point 084 [INDICATOR - NNE @ 2.58 miles]

Sample ID: 431091

Sample Dates: 12/12/2016 -12/19/2016 Nuclide Activity 2 Sigma Error MDA Beta 3.03E-02 3.50E-03 2.95E-03 Sample ID: 431491 Sample Dates: 12/19/2016 -12/27/2016 Nuclide Activity 2 Sigma Error MDA Beta 3.72E-02 3.55E-03 2.87E-03

. Sample ID: 431843 Sample Dates: 9/26/2016 -12/27/2016 Nuclide Activity 2 Sigma Error MDA Cs-134 <6.03E-04 O.OOE+OO 6.03E-04 Cs-137 <5.18E-04 O.OOE+OO 5.18E-04 Be-7 1.43E-01 2.34E-02 1.38E-02 K-40 4.69E-03 6.17E-03 1.01 E-02 Sample Point 085 [INDICATOR - NNW@ 0.88 miles]

Sample ID: 398721 Sample Dates: 12/28/2015 - 1/5/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.15E-02 2.48E-03 2.15E-03 Sample ID: 398985 Sample Dates: 1/5/2016 -1/11/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.24E-02 2.71E-03 3.37E-03 Sample ID: 399292 Sample Dates: 1/11/2016 -1/18/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.SBE-02 2.99E-03 2.62E-03 Sample ID: 400033 Sample Dates: 1/18/2016 -1/25/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.57E-02 2.52E-03 2.69E-03 Sample ID: 400395 Sample Dates: 1/25/2016 - 2/1/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.97E-02 2.75E-03 2.90E-03 Sample ID: 401033 Sample Dates: 2/1 /2016 - 2/8/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.15E-02 2.BOE-03 2.70E-03 Sample ID: 401387 Sample Dates: 2/8/2016 - 2/*15/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.76E-02 2.63E-03 2.75E-03 Sample ID: 401832 Sample Dates: 2/15/2016 - 2/22/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.72E-02 2.57E-03 2.68E-03 Sample ID: 402353 Sample Dates: 2/22/2016 - 2/29/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.46E-02 2.45E-03 2.66E-03 Sample ID: 403077 Sample Dates: 2/29/2016 - 3/7/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.55E-02 2.62E-03 3.03E-03 Sample ID: 404568 Sample Dates: 3/7/2016 -3/14/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.37E-02 2.56E-03 3.12E-03 Sample ID: 405435 Sample Dates: 3/14/2016 - 3/21 /2016 Nuclide Activity 2 Sigma Error MDA Beta 1.66E-02 2.67E-03 3.03E-03 Sample ID: 406066 Sample Dates: 3/21/2016 - 3/28/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.74E-02 2.65E-03 2.85E-03 Sample ID: 406425 Sample Dates: 12/28/2015 - 3/28/2016 Nuclide Activity 2 Sigma Error MDA Cs-134 <3.84E-04 O.OOE+OO 3.84E-04 Cs-137 <5.41E-04 O.OOE+OO 5.41E-04 Be-7 1.51 E-01 2.39E-02 1.07E-02 K-40 <1.35E-02 O.OOE+OO 1.35E-02 Sample ID: 406419 Sample Dates: 3/28/2016 - 4/4/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.36E-02 2.45E-03 2.87E-03 Sample ID: 407599 Sample Dates: 4/4/2016 - 4/11/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.33E-02 2.48E-03 2.93E-03 Sample ID: 408160 Sample Dates: 4/11/2016 -4/18/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.14E-02 2.SOE-03 2.76E-03 Sample ID: 409482 Sample Dates: 4/18/2016 -4/25/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.23E-02 2.79E-03 2.59E-03 Sample ID: 409814 Sample Dates: 4/25/2016 - 5/2/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.10E-02 2.77E-03 2.68E-03 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 14 of 91 Duke Energy Annual Report -Appendix E EnJ) 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 Sample Point 085 [INDICATOR - NNW@ 0.88 miles]

Sample ID: 410988 Sample Dates: 5/2/2016 -5/9/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.32E-02 2.32E-03 2.52E-03 Sample ID: 411460 Sample Dates: 5/9/2016 - 5/16/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.35E-02 2.92E-03 2.76E-03 Sample ID: 411793 Sample Dates: 5/16/2016 - 5/23/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.64E-02 2.54E-03 2.74E-03 Sample ID: 412253 Sample Dates: 5/23/2016 -5/31/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.67E-02 2.90E-03 2.71E-03 Sample ID: 412771 Sample Dates: 5/31/2016 - 6/6/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.03E-02 3.00E-03 3.07E-03 Sample ID: 413386 Sample Dates: 6/6/2016 - 6/13/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.28E-02 2.87E-03 2.71E-03 Sample ID: 413922 Sample Dates: 6/13/2016 - 6/20/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.21E-02 2.89E-03 2.94E-03 Sample ID: 415060 Sample Dates: 6/20/2016 - 6/27/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.49E-02 2.97E-03 2.72E-03 Sample ID: 415461 Sample Dates: 3/28/2016 - 6/27/2016 Nuclide Activity 2 Sigma Error MDA Cs-134 <7.0BE-04 O.OOE+OO 7.0SE-04 Cs-137 <4.89E-04 O.OOE+OO 4.89E-04 Be-7 1.71 E-01 2.51E-02 1.11E-02 K-40 <1.29E-02 O.OOE+OO 1.29E-02 Sample ID: 415455 Sample Dates: 6/27/2016 - 7/5/2016 Nuclide Activity 2 Sigma Error MDA Beta 3.12E-02 2.92E-03 2.16E-03 Sample ID: 416438 Sample Dates: 7/5/2016 - 7/11/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.55E-02 2.86E-03 3.32E-03 Sample ID: 417051 Sample Dates: 7/11/2016 -7/18/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.94E-02 2.77E-03 2.88E-03 Sample ID: 417442 Sample Dates: 7/18/2016 -7/25/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.96E-02 3.20E-03 2.88E-03 Sample ID: 417835 Sample Dates: 7/25/2016 - 8/1/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.01E-02 2.79E-03 2.86E-03 Sample ID: 418311 Sample Dates: 8/1/2016 -8/8/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.02E-02 2.SOE-03 2.89E-03 Sample ID: 419029 Sample Dates: 8/8/2016 - 8/15/2016 Nuclide Activity 2 Sigma Error MDA Beta 8.51E-03 2.16E-03 2.81 E-03 Sample ID: 419527 Sample Dates: 8/15/2016 - 8/22/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.35E-02 2.53E-03 3.01E-03 Sample ID: 420056 Sample Dates: 8/22/2016 - 8/29/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.65E-02 3.07E-03 2.87E-03 Sample ID: 420602 Sample Dates: 8/29/2016 - 9/6/2016 Nuclide Activity 2 Sigma Error MDA Beta 3.11E-02 2.98E-03 2.44E-03 Sample ID: 421468 Sample Dates: 9/6/2016 -9/12/2016 Nuclide Activity 2 Sigma Error MDA Beta 3.BBE-02 3.93E-03 3.51E-03 Sample ID: 422604 Sample Dates: 9/12/2016 - 9/19/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.79E-02 3.12E-03 2.79E-03 Sample ID: 423347 Sample Dates: 9/19/2016 - 9/26/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.47E-02 2.94E-03 2.66E-03 Sample ID: 424487 Sample Dates: 6/27/2016 - 9/26/2016 Nuclide Activity 2 Sigma Error MDA Cs-134 <5.77E-04 O.OOE+OO 5.77E-04 Cs-137 <4.09E-04 O.OOE+OO 4.09E-04 Be-7 1.71E-01 2.46E-02 9.50E-03 K-40 9.71 E-03 5.95E-03 6.59E-03 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 15 of 91 Duke Energy Annual Report -Appendix E

En~ 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 Sample Point 085 [INDICATOR - NNW@ 0.88 miles]

Sample ID: 424481 Sample Dates: 9/2612016 -10/312016 Nuclide Activity 2 Sigma Error MDA Beta 2.77E-02 3.12E-03 2.85E-03 Sample ID: 425483 Sample Dates: 10/3/2016 - 10/10/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.19E-02 2.87E-03 2.90E-03 Sample ID: 426025 Sample Dates: 10/10/2016 -10/17/2016 Nuclide Activity 2 Sigma Error MDA Beta 3.12E-02 3.27E-03 2.85E-03 Sample ID: 426394 Sample Dates: 10/1712016 - 10/24/2016 Nuclide Activity 2 Sigma Error MDA Beta , 2.19E-02 2.87E-03 2.86E-03 Sample ID: 427078 Sample Dates: 10/24/2016 - 10/3112016 Nuclide Activity 2 Sigma Error MDA Beta 4.0BE-02 3.56E-03 2.54E-03 Sample ID: 427746 Sample Dates: 10/31 /2016 -11 /7/2016 Nuclide Activity 2 Sigma Error MDA Beta 4.64E-02 3.73E-03 2.54E-03 Sample ID: 428246 Sample Dates: 11/7/2016 -11/14/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.13E-02 2.83E-03 2.75E-03 Sample ID: 428922 Sample Dates: 1111412016 - 11/21/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.69E-02 4.17E-03 4.50E-03 Sample ID: 429424 Sample Dates: 11/2112016 -11/28/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.69E-02 3.10E-03 2.88E-03 Sample ID: 429984 Sample Dates: 11/28/2016 -12/5/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.10E-02 2.84E-03 2.93E-03 Sample ID: 430610 Sample Dates: 1215/2016 -12/12/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.37E-02 2.84E-03 2.63E-03 Sample ID: 431092 Sample Dates: 12/12/2016 - 12/19/2016 Nuclide Activity 2 Sigma Error MDA Beta 3.77E-02 3.83E-03 2.94E-03 Sample ID: 431492 Sample Dates: 12/1912016 -12/27/2016 Nuclide Activity 2 Sigma Error MDA Beta 4.13E-02 3.70E-03 2.87E-03 Sample ID: 431844 Sample Dates: 9/26/2016 -12/27/2016 Nuclide Activity 2 Sigma Error MDA Cs-134 <8.62E-04 O.OOE+OO 8.62E-04 Cs-137 <5.33E-04 O.OOE+OO 5.33E-04 Be-7 1.45E-01 2.41 E-02 1.40E-02 K-40 7.71 E-03 6.69E-03 9.69E-03 Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 Sample Point 077 [INDICATOR - SW@ 1 miles]

Sample ID: 398728 Sample Dates: 12/2812015 -1/5/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.43E-02 O.OOE+OO 1.43E-02 Cs-134 <1.15E-02 O.OOE+OO 1.15E-02 Cs-137 <1.42E-02 O.OOE+OO 1.42E-02 Be-7 <8.26E-02 O.OOE+OO 8.26E-02 K-40 4.5BE-01 1.71E-01 4.13E-02 Sample ID: 398986 Sample Dates: 1/5/2016 -1/11/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.55E-03 O.OOE+OO 8.55E-03 Cs-134 <7.82E-03 O.OOE+OO 7.B2E-03 Cs-137 <1.05E-02 O.OOE+OO 1.05E-02 Be-7 <7.52E-02 O.OOE+OO 7.52E-02 K-40 <1.35E-01 O.OOE+OO 1.35E-01 Sample ID: 399293 Sample Dates: 1/11/2016 -1/18/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.86E-02 O.OOE+OO 1.86E-02 Cs-134 <1.16E-02 O.OOE+OO 1.16E-02 Cs-137 <8.03E-03 O.OOE+OO 8.03E-03 Be-7 <1.19E-01 O.OOE+OO 1.19E-01 K-40 3.41 E-01 1.94E-01 2.35E-01 Sample ID: 400034 Sample Dates: 1/18/2016 - 1/25/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.68E-03 O.OOE+OO 7.68E-03 Cs-134 <8.27E-03 O.OOE+OO 8.27E-03 Cs-137 <7.36E-03 O.OOE+OO 7.36E-03 Be-7 <5.79E-02 O.OOE+OO 5.79E-02 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 16 of 91 Duke Energy Annual Report -Appendix E En=:> 13339 Hagers Ferry Road Huntersville, North Carolina 28078 L_

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 Sample Point 077 [INDICATOR - SW@ 1 miles]*,

Sample ID: 400034 Sample Dates: 1/18/2016 -1/25/2016 Nuclide Activity 2 Sigma Error MDA K-40 <3.21E-01 O.OOE+OO 3.21E-01 Sample ID: 400396 Sample Dates: 1/25/2016 - 2/1/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.69E-02 O.OOE+OO 1.69E-02 Cs-134 <1.63E-02 O.OOE+OO 1.63E-02 Cs-137 <1.41 E-02 O.OOE+OO 1.41 E-02 Be-7 <9.19E-02 O.OOE+OO 9.19E-02 K-40 6.41 E-01 2.17E-01 4.69E-02 Sample ID: 401034 Sample Dates: 2/1/2016 - 2/8/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.60E-03 O.OOE+OO 8.60E-03 Cs-134 <5.49E-03 O.OOE+OO 5.49E-03 Cs-137 <8.32E-03 O.OOE+OO 8.32E-03 Be-7 <6.09E-02 0.00E+OO 6.09E-02 K-40 3.39E-01 1.35E-01 1.19E-01 Sample ID: 401388 Sample Dates: 2/8/2016 - 2/15/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.30E-03 O.OOE+OO 9.30E-03 Cs-134 <7.64E-03 O.OOE+OO 7.64E-03 Cs-137 <8.42E-03 O.OOE+OO 8.42E-03 Be-7 <4.73E-02 O.OOE+OO 4.73E-02 K-40 3.23E-01 1.25E-01 9.23E-02 Sample ID: 401833 Sample Dates: 2/15/2016 -2/22/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.19E-03 O.OOE+OO 8.19E-03 Cs-134 <7.09E-03 O.OOE+OO 7.09E-03 Cs-137 <7.52E-03 O.OOE+OO 7.52E-03 Be-7 <5.66E-02 O.OOE+OO 5.66E-02 K-40 4.21 E-01 1.46E-01 1.11E-01 I

Sample ID: 402354 Sample Dates: 2/22/2016 - 2/29/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.72E-03 O.OOE+OO 8.72E-03 Cs-134 <7.45E-03 O.OOE+OO 7.45E-03 Cs-137 <6.64E-03 O.OOE+OO 6.64E-03 Be-7 <4.81E-02 O.OOE+OO 4.81 E-02 K-40 3.10E-01 1.27E-01 1.12E-01 Sample ID: 403078 Sample Dates: 2/29/2016 - 3/7/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <6.90E-03 O.OOE+OO 6.90E-03 Cs-134 <8.26E-03 O.OOE+OO 8.26E-03 Cs-137 <8.21E-03 O.OOE+OO 8.21E-03 Be-7 <4.10E-02 O.OOE+OO 4.10E-02 K-40 3.78E-01 1.49E-01 1.33E-01 Sample ID: 404569 Sample Dates: 3/7/2016 - 3/14/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.02E-02 O.OOE+OO 1.02E-02 Cs-134 <6.02E-03 O.OOE+OO 6.02E-03 Cs-137 <9.35E-03 O.OOE+OO 9.35E-03 Be-7 <5.28E-02 O.OOE+OO 5.28E-02 K-40 4.83E-01 1.55E-01 1.04E-01 Sample ID: 405436 Sample Dates: 3/14/2016 - 3/21 /2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.57E-03 O.OOE+OO 8.57E-03 Cs-134 <7.03E-03 O.OOE+OO 7.03E-03 Cs-137 <7.45E-03 O.OOE+OO 7.45E-03 Be-7 <6.31E-02 0.00E+OO 6.31E-02 K-40 3.77E-01 1.49E-01 1.49E-01 Sample ID: 406067 Sample Dates: 3/21/2016 - 3/28/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.12E-02 O.OOE+OO 1.12E-02 Cs-134 <7.60E-03 O.OOE+OO 7.60E-03 Cs-137 <8.92E-03 O.OOE+OO 8.92E-03 Be-7 <5.13E-02 O.OOE+OO 5.13E-02 K-40 3.46E-01 1.23E-01 2.76E-02 Sample ID: 406426 Sample Dates: 3/28/2016 - 4/4/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.10E-02 O.OOE+OO 1.1DE-02 Cs-134 <6.26E-03 O.OOE+OO 6.26E-03 Cs-137 <5.50E-03 O.OOE+OO 5.SOE-03 Be-7 <4.74E-02 O.OOE+OO 4.74E-02 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 17 of 91 Duke Energy Annual Report -Appendix E

En;> 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 Sample Point 077 [INDICATOR - SW@ 1 miles]

Sample ID: 406426 Sample Dates: 3/28/2016 -4/4/2016 Nuclide Activity 2 Sigma Error MDA K-40 5.28E-01 1.54E-01 2.75E-02 Sample ID: 407600 Sample Dates: 4/4/2016 -4/11/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.10E-03 O.OOE+OO 8.10E-03 Cs-134 <6.54E-03 O.OOE+OO 6.54E-03 Cs-137 <8.86E-03 O.OOE+OO 8.86E-03 Be-7 <6.61E-02 O.OOE+OO 6.61E-02 K-40 4.15E-01 1.60E-01 1.51 E-01 Sample ID: 408161 Sample Dates: 4/1112016 - 4/18/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.16E-02 O.OOE+OO 1.16E-02 Cs-134 <5.80E-03 O.OOE+OO 5.80E-03 Cs-137 <7.20E-03 O.OOE+OO 7.20E-03 Be-7 <5.90E-02 O.OOE+OO 5.90E-02 K-40 3.57E-01 1.48E-01 1.59E-01 Sample ID: 409483 Sample Dates: 4/18/2016 - 4/25/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <6.20E-03 O.OOE+OO 6.2DE-03 Cs-134 <3.73E-03 O.OOE+OO 3.73E-03 Cs-137 <4.90E-03 O.OOE+OO 4.90E-03 Be-7 <3.37E-02 O.OOE+OO 3.37E-02 K-40 3.50E-01 1.02E-01 9.12E-02 Sample ID: 409815 Sample Dates: 4/25/2016 - 5/2/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.11E-03 O.OOE+OO 8.11E-03 Cs-134 <9.30E-03 0.00E+OO 9.30E-03 Cs-137 <1.11 E-02 O.OOE+OO 1.11 E-02 Be-7 <4.28E-02 O.OOE+OO 4.28E-02 K-40 <2.70E-01 O.OOE+OO 2.70E-01 Sample ID: 410989 Sample Dates: 5/2/2016 - 5/9/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.40E-03 O.OOE+OO 7.40E-03 Cs-134 <6.77E-03 O.OOE+OO 6.77E-03 Cs-137 <9.94E-03 O.OOE+OO 9.94E-03 Be-7 <4.64E-02 O.OOE+OO 4.64E-02 K-40 4.10E-01 1.35E-01 2.7BE-02 Sample ID: 411461 Sample Dates: 5/9/2016 - 5/16/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.43E-03 O.OOE+OO 7.43E-03 Cs-134 <8.02E-03 O.OOE+OO B.02E-03 Cs-137 <6.76E-03 O.OOE+OO 6.76E-03 Be-7 <5.73E-02 O.OOE+OO 5.73E-02 K-40 4.87E-01 1.56E-01 1.04E-01 Sample ID: 411794 Sample Dates: 5/16/2016 - 5/23/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.95E-03 O.OOE+OO 9.95E-03 Cs-134 <7.23E-03 O.OOE+OO 7.23E-03 Cs-137 <7.19E-03 O.OOE+OO 7.19E-03 Be-7 <5.51E-02 O.OOE+OO 5.51E-02 K-40 <2.94E-01 O.OOE+OO 2.94E-01 Sample ID: 412254 Sample Dates: 5/23/2016 - 5/31/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.84E-03 O.OOE+OO 7.84E-03 Cs-134 <6.41E-03 0.00E+OO 6.41E-03 Cs-137 <6.36E-03 O.OOE+OO 6.36E-03 Be-7 <4.58E-02 O.OOE+OO 4.58E-02 K-40 2.18E-01 9.10E-02 2.46E-02 Sample ID: 412772 Sample Dates: 5/31/2016 -6/6/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.12E-02 O.OOE+OO 1.12E-02 Cs-134 <8.31 E-03 O.OOE+OO 8.31E-03 Cs-137 <8.48E-03 O.OOE+OO 8.48E-03 Be-7 <7.60E-02 O.OOE+OO 7.60E-02 K-40 5.53E-01 1.93E-01 1.BOE-01 Sample ID: 413387 Sample Dates: 6/6/2016 - 6/13/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.58E-03 O.OOE+OO 8.58E-03 Cs-134 <7.62E-03 O.OOE+OO 7.62E-03 Cs-137 <8.41 E-03 O.OOE+OO 8.41 E-03 i3e-7 <4.66E-02 O.OOE+OO 4.66E-02 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 18 of 91 Duke Energy Annual Report -Append.ix E En~ 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report- 2016 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCilm3 Sample Point 077 [INDICATOR ~*sw@ 1 miles]

Sample ID: '413387 Sample Dates: 6/6/2016 - 6/13/2016 Nuclide Activity 2 Sigma Error MDA K-40 4.19E-01 1.45E-01 1.12E-01 Sample ID: 413923 Sample Dates: 6/13/2016 - 6/20/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.22E-02 O.OOE+OO 1.22E-02 Cs-134 <8.67E-03 O.OOE+OO 8.67E-03 Cs-137 <8.15E-03 O.OOE+OO 8.15E-03 Be-7 <4.76E-02 O.OOE+OO 4.76E-02 K-40 2.40E-01 1.07E-01 3.10E-02 Sample ID: 415061 Sample Dates: 6/20/2016 - 6/27/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.10E-02 O.OOE+OO 1.10E-02 Cs-134 <7.24E-03 O.OOE+OO 7.24E-03 Cs-137 <6.44E-03 O.OOE+OO 6.44E-03 Be-7 <5.84E-02 O.OOE+OO 5.84E-02 K-40 4.35E-01 1.45E-01 9.55E-02 Sample ID: 415462 Sample Dates: 6/27/2016 - 7/5/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <6.85E-03 O.OOE+oo 6.85E-03 Cs-134 <7.18E-03 O.OOE+OO 7.18E-03 Cs-137 <6.39E-03 O.OOE+OO 6.39E-03 Be-7 <4.63E-02 O.OOE+OO 4.63E-02 K-40 3.11 E-01 1.27E-01 1.19E-01 Sample ID: 416439 Sample Dates: 7/5/2016 -7/11/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.03E-02 O.OOE+OO 1.03E-02 Cs-134 <7.73E-03 O.OOE+OO 7.73E-03 Cs-137 <8.81 E-03 O.OOE+OO 8.81E-03 Be-7 <7.02E-02 O.OOE+OO 7.02E-02 K-40 <3.58E-01 O.OOE+OO 3.58E-01 Sample ID: 417052 Sample Dates: 7/11/2016 -7/18/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.93E-03 O.OOE+OO 7.93E-03 Cs-134 <6.22E-03 O.OOE+OO 6.22E-03 Cs-137 <8.84E-03 O.OOE+OO 8.84E-03 Be-7 <4.60E-02 O.OOE+OO 4.60E-02 K-40 3.16E-01 1.43E-01 1.63E-01 Sample ID: 417443 Sample Dates: 7/18/2016 -7/25/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.55E-03 O.OOE+OO 8.55E-03 Cs-134 <6.0SE-03 O.OOE+OO 6.05E-03 Cs-137 <7.53E-03 O.OOE+OO 7.53E-03 Be-7 <4.32E-02 O.OOE+OO 4.32E-02 K-40 2.76E-01 1.20E-01 1.06E-01 Sample ID: 417836 Sample Dates: 7/25/2016 - 8/1/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <5.30E-03 O.OOE+OO 5.30E-03 Cs-134 <8.37E-03 O.OOE+OO 8.37E-03 Cs-137 <5.81 E-03 O.OOE+OO 5.81E-03 Be-7 <6.35E-02 O.OOE+OO 6.35E-02 K-40 4.53E-01 1.51 E-01 1.07E-01 Sample ID: 418312 Sample Dates: 8/1 /2016 - 8/8/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.46E-03 O.OOE+OO 9.46E-03 Cs-134 <3.70E-03 O.OOE+OO 3.70E-03 Cs-137 <6.73E-03 O.OOE+OO 6.73E-03 Be-7 <6.67E-02 O.OOE+OO 6.67E-02 K-40 4.32E-01 1.56E-01 1.45E-01 Sample ID: 419030 Sample Dates: 8/8/2016 - 8/15/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.25E-02 O.OOE+OO 1.25E-02 Cs-134 <5.69E-03 O.OOE+OO 5.69E-03 Cs-137 <1.04E-02 O.OOE+OO 1.04E-02 Be-7 <4.55E-02 O.OOE+OO 4.55E-02 K-40 5.57E-01 1.79E-01 1.48E-01 Sample ID: 419528 Sample Dates: 8/15/2016 - 8/22/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <6.92E-03 O.OOE+OO 6.92E-03 Cs-134 <7.18E-03 O.OOE+OO 7.1BE-03 Cs-137 <4.66E-03 O.OOE+OO 4.66E-03 Be-7 <3.?BE-02 0.00E+OO 3.76E-02 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 19 of 91 Duke Energy Annual Report -Appendix E En:> 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 Sample Point 077 [INDICATOR - SW@ 1 miles ]

Sample ID: 419528 Sample Dates: 8/15/2016 - 8/22/2016 Nuclfde Activity 2 Sigma Error MDA K-40 3.17E-01 1.47E-01 1.70E-01 Sample ID: 420057 Sample Dates: 8/22/2016 - 8/29/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.54E-03 O.OOE+OO 8.54E-03 Cs-134 <7.05E-03 O.OOE+OO 7.05E-03 Cs-137 <6.70E-03 O.OOE+OO 6.70E-03 Be-7 <5.62E-02 O.OOE+OO 5.62E-02 K-40 3.58E-01 1.47E-01 1.54E-01 Sample ID: 420603 Sample Dates: 8/29/2016 - 9/6/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.78E-03 O.OOE+OO 8.78E-03 Cs-134 <4.73E-03 O.OOE+OO 4.73E-03 Cs-137 <6.56E-03 O.OOE+OO 6.56E-03 Be-7 <5.30E-02 O.OOE+OO 5.30E-02 K-40 3.21E-01 1.21 E-01 9.98E-02 Sample ID: 421469 Sample Dates: 9/6/2016 - 9/12/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.13E-02 O.OOE+OO 1.13E-02 Cs-134 <1.11E-02 O.OOE+OO 1.11E-02 Cs-137 <1.03E-02 O.OOE+OO 1.03E-02 Be-7 <7.83E-02 0.00E+OO 7.83E-02 K-40 4.73E-01 1.64E-01 1.19E-01 Sample ID: 422605 Sample Dates: 9/12/2016 - 9/19/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.06E-02 O.OOE+OO 1.06E-02 Cs-134 <4.67E-03 O.OOE+OO 4.67E-03 Cs-137 <6.73E-03 O.OOE+OO 6.73E-03 Be-7 <5.30E-02 O.OOE+OO 5.30E-02 K-40 <3.56E-01 O.OOE+OO 3.56E-01 Sample ID: 423348 Sample Dates: 9/19/2016 - 9/26/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <5.18E-03 O.OOE+OO 5.18E-03 Cs-134 <6.BOE-03 O.OOE+OO 6.BOE-03 Cs-137 <9.00E-03 O.OOE+OO 9.00E-03 Be-7 <4.65E-02 O.OOE+OO 4.65E-02 K-40 4.28E-01 1.59E-01 1.56E-01 Sample ID: 424488 Sample Dates: 9/26/2016 - 10/3/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.04E-02 O.OOE+OO 1.04E-02 Cs-134 <9.40E-03 O.OOE+OO 9.40E-03 Cs-137 <8.79E-03 O.OOE+OO B.79E-03 Be-7 <4.65E-02 O.OOE+OO 4.65E-02 K-40 3.74E-01 1.64E-01 1.87E-01 Sample ID: 425484 Sample Dates: 10/3/2016 -10/10/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.22E-03 O.OOE+OO 8.22E-03 Cs-134 <7.72E-03 O.OOE+OO 7.72E-03 Cs-137 <5.34E-03 O.OOE+OO 5.34E-03 Be-7 <4.95E-02 O.OOE+OO 4.95E-02 K-40 3.74E-01 1.26E-01 2.67E-02 Sample ID: 426026 Sam pie Dates: 1 0/1 0/2016 - 1 0/1712016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.80E-03 O.OOE+OO 8.BOE-03 Cs-134 <4.81E-03 O.OOE+OO 4.81 E-03 Cs-137 <6.93E-03 O.OOE+OO 6.93E-03 Be-7 <3.83E-02 O.OOE+OO 3.83E-02 K-40 2.96E-01 1.24E-01 1.04E-01 Sample ID: 426395 Sample Dates: 10/17/2016 -10/24/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <5.20E-03 0.00E+OO 5.20E-03 Cs-134 <7.57E-03 0.00E+OO 7.57E-03 Cs-137 <7.11E-03 0.00E+OO 7.11 E-03 Be-7 <5.78E-02 O.OOE+OO 5.7BE-02 K-40 3.85E-01 1.30E-01 2.75E-02 Sample ID: 427079 Sample Dates: 10/24/2016 -10/31/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.48E-03 O.OOE+OO 7.48E-03 Cs-134 <7.69E-03 O.OOE+OO 7.69E-03 Cs-137 <9.55E-03 0.00E+OO 9.55E-03 Be-7 <3.62E-02 O.OOE+OO 3.62E-02 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 20 of 91 Duke Energy Annual Report -Appendix E En~ 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 Sample Point 077 [INDICATOR - SW@ 1 miles]

Sample ID: 427079 Sample Dates: 10/2412016 -10/31/2016 Nuclide Activity 2 Sigma Error MDA K-40 3.46E-01 1.30E-01 9.67E-02 Sample ID: 427747 Sample Dates: 10/31/2016 -11/7/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.55E-03 O.OOE+OO 9.55E-03 Cs-134 <7.64E-03 O.OOE+OO 7.64E-03 Cs-137 <9.48E-03 O.OOE+OO 9.48E-03 Be-7 <4.70E-02 O.OOE+OO 4.70E-02 K-40 3.29E-01 1.57E-01 1.94E-01 Sample ID: 428247 Sample Dates: 11/7/2016 -11/14/.2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.15E-03 O.OOE+OO 9.15E-03 Cs-134 <4.56E-03 O.OOE+OO 4.56E-03 Cs-137 <7.32E-03 O.OOE+OO 7.32E-03 Be-7 <5.22E-02 O.OOE+OO 5.22E-02 K-40 4.39E-01 1.51 E-01 1.15E-01 Sample ID: 428923 Sample Dates: 11/14/2016 -11/21/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <2.57E-02 O.OOE+OO 2.57E-02 Cs-134 <1.28E-02 O.OOE+OO 1.28E-02 Cs-137 <1.14E-02 O.OOE+OO 1.14E-02 Be-7 <9.94E-02 0.00E+OO 9.94E-02 K-40 5.37E-01 2.10E-01 1.77E-01 Sample ID: 429425 Sample Dates: 11/21/2016 -11/28/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <4.72E-03 O.OOE+OO 4.72E-03 Cs-134 <8.31 E-03 0.00E+OO 8.31 E-03 Cs-137 <8.25E-03 O.OOE+OO 8.25E-03 Be-7 <5.82E-02 O.OOE+OO 5.82E-02 K-40 4.17E-01 1.43E-01 3.14E-02 Sample ID: 429985 '

Sample Dates: 11 /28/2016 - 12/5/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.54E-03 O.OOE+OO 9.54E-03 Cs-134 <6.32E-03 O.OOE+OO 6.32E-03 Cs-137 <6.45E-03 0.00E+OO 6.45E-03 Be-7 <6.82E-02 O.OOE+OO 6.82E-02 K-40 4.73E-01 1.46E-01 2.79E-02 Sample ID: 430611 Sample Dates: 12/5/2016 -12/12/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.13E-03 O.OOE+OO 7.13E-03 Cs-134 <5.64E-03 O.OOE+OO 5.64E-03 Cs-137 <7.65E-03 O.OOE+OO 7.65E-03 Be-7 <5.98E-02 0.00E+OO 5.98E-02 K-40 3.43E-01 1.32E-01 1.14E-01 Sample ID: 431093 Sample Dates: 12/12/2016 -12/19/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.65E-03 O.OOE+OO 8.65E-03 Cs-134 <7.00E-03 O.OOE+OO 7.00E-03 Cs-137 <5.73E-03 O.OOE+OO 5.73E-03 Be-7 <5.68E-02 O.OOE+OO 5.68E-02 K-40 3.62E-01 1.55E-01 1.74E-01 Sample ID: 431493 Sample Dates: 12/19/2016 -12/27/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.21E-03 O.OOE+OO 8.21 E-03 Cs-134 <7.97E-03 O.OOE+OO 7.97E-03 Cs-137 <6.32E-03 0.00E+OO 6.32E-03 Be-7 <4.83E-02 O.OOE+OO 4.83E-02 K-40 3.17E-01 1.18E-01 9.31E-02 Sample Point 078.1 [INDICATOR - WSW@ 0.53 miles]

Sample ID: 398729 Sample Dates: 12/28/2015 - 1/5/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.44E-02 O.OOE+OO 1.44E-02 Cs-134 <1.21E-02 O.OOE+OO 1.21 E-02 Cs-137 <1.33E-02 O.OOE+OO 1.33E-02 Be-7 <1.14E-01 O.OOE+OO 1.14E-01 K-40 <4.04E-01 O.OOE+OO 4.04E-01 Sample ID: 398987 Sample Dates: 1/5/2016 -1/11/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.82E-03 O.OOE+OO 7.82E-03 Cs-134 <8.26E-03 O.OOE+OO 8.26E-03 Cs-137 <7.83E-03 O.OOE+OO 7.83E-03 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 21 of 91 Duke Energy Annual Report -Appendix E En~ 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 Sample Point 078.1 [ INDICATOR-WSW@0.53 miles]

Sample ID: 398987 Sample Dates: 1/5/2016 -1111/2016 Nuclide Activity 2 Sigma Error MDA Be-7 <7.03E-02 O.OOE+OO 7.03E-02 K-40 <3.53E-01 O.OOE+OO 3.53E-01 Sample ID: 399294 Sample Dates: 1/11/2016 -1/18/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.54E-02 0.00E+OO 1.54E-02 Cs-134 <1.47E-02 O.OOE+OO 1.47E-02 Cs-137 <1.31E-02 O.OOE+OO 1.31 E-02 Be-7 <6.60E-02 O.OOE+OO 6.60E-02 K-40 4.21E-01 2.16E-01 2.56E-01 Sample ID: 400035 Sample Dates: 1/18/2016 - 1/25/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <6.22E-03 O.OOE+OO 6.22E-03 Cs-134 <6.94E-03 O.OOE+OO 6.94E-03 Cs-137 <B.63E-03 O.OOE+OO B.63E-03 Be-7 <6.29E-02 O.OOE+OO 6.29E-02 K-40 3.79E-01 1.31E-01 2.B5E-02 Sample ID: 400397 Sample Dates: 112512016 - 2/1/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.43E-02 O.OOE+OO 1.43E-02 Cs-134 <1.22E-02 O.OOE+OO 1.22E-02 Cs-137 <1.29E-02 O.OOE+OO 1.29E-02 Be-7 <7.55E-02 O.OOE+OO 7.55E-02 K-40 3.B6E-01 2.07E-01 2.49E-01 Sample ID: 401035 Sample Dates: 2/1/2016 - 2/8/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <6.14E-03 O.OOE+OO 6.14E-03 Cs-134 <5.95E-03 0.00E+OO 5.95E-03 Cs-137 <B.07E-03 O.OOE+OO B.07E-03 Be-7 <5.61E-02 O.OOE+OO 5.61 E-02 K-40 3.50E-01 1.47E-01 1.54E'01 Sample ID: 401389 Sample Dates: 2/812016 - 2/15/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.1BE-02 O.OOE+OO 1.18E-02 Cs-134 <3.71E-03 O.OOE+OO 3.71E-03 Cs-137 <5.82E-03 O.OOE+OO 5.B2E-03 Be-7 <5.33E-02 O.OOE+OO 5.33E-02 K-40 5.46E-01 1.58E-01 2.B5E-02 Sample ID: 401834 Sample Dates: 2/15/2016 - 2/22/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.57E-03 O.OOE+OO 7.57E-03 Cs-134 <4.53E-03 O.OOE+OO 4.53E-03 Cs-137 <1.01 E-02 O.OOE+OO 1.01 E-02 Be-7 <3.65E-02 O.OOE+OO 3.65E-02 K-40 3.76E-01 1.30E-01 2.83E-02 Sample ID: 402355 Sample Dates: 2/22/2016 - 2/29/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.43E-03 O.OOE+OO 7.43E-03 Cs-134 <3.64E-03 O.OOE+OO 3.64E-03 Cs-137 <B.66E-03 O.OOE+OO B.66E-03 Be-7 <4.81E-02 O.OOE+OO 4.81 E-02 K-40 <9.65E-02 0.00E+OO 9.65E-02 Sample ID: 403079 Sample Dates: 2/29/2016 - 3/7/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.70E-03 O.OOE+OO 9.70E-03 Cs-134 <7.59E-03 O.OOE+OO 7.59E-03 Cs-137 <6.77E-03 O.OOE+OO 6.77E-03 Be-7 <4.37E-02 O.OOE+OO 4.37E-02 K-40 2.25E-01 1.20E-01 1.41E-01 Sample ID: 404570 Sample Dates: 3/7/2016 - 3/14/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.58E-03 O.OOE+OO B.58E-03 Cs-134 <6.86E-03 O.OOE+OO 6.86E-03 Cs-137 <7.25E-03 O.OOE+OO 7.25E-03 Be-7 <5.1BE-02 O.OOE+OO 5.1 BE-02 K-40 3.39E-01 1.39E-01 1.35E-01 Sample ID: 405437 Sample Dates: 3/14/2016 - 3/2112016 Nuclide Activity 2 Sigma Error MDA 1-131 <B.02E-03 O.OOE+OO B.02E-03 Cs-134 <6.35E-03 O.OOE+OO 6.35E-03 Cs-137 <9.04E-03 O.OOE+OO 9.04E-03 Report Generated @4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 22 of 91 Duke Energy Annual Report -Appendix E En~ 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE-Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 Sampfe Point 078.1 [INDICATOR -WSW@0.53 miles]

Sample ID: 405437 Sample Dates: 3/14/2016 - 3/21/2016 Nuclide Activity 2 Sigma Error MDA Be-7 <4.69E-02 O.OOE+OO 4.69E-02 K-40 3.39E-01 1.37E-01 ) .30E-01 Sample ID: 406068 Sample Dates: 3/21/2016 - 3/28/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.23E-03 O.OOE+OO 8.23E-03 Cs-134 <7.77E-03 O.OOE+OO 7.77E-03 Cs-137 <9.65E-03 0.00E+OO 9.65E-03 Be-7 <5.64E-02 O.OOE+OO 5.64E-02 K~40 3.77E-01 1.30E-01 2.83E-02 Sample ID: 406427 Sample Dates: 3/28/2016 - 4/4/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.04E-02 0.00E+OO 1.04E-02 Cs-134 <5.84E-03 O.OOE+OO 5.84E-03 Cs-137 <6.24E-03 O.OOE+OO 6.24E-03 Be-7 <6.28E-02 O.OOE+OO 6.28E-02 K-40 3.55E-01 1.39E-01 1.12E-01 Sample ID: 407601 Sample Dates: 4/4/2016 -4/11/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.10E-02 O.OOE+OO 1.10E-02 Cs-134 <5.52E-03 O.OOE+OO 5.52E-03 Cs-137 <4.?0E-03 O.OOE+OO 4.70E-03 Be-7 <5.42E-02 O.OOE+OO 5.42E-02 K-40 <3.20E-01 0.00E+OO 3.20E-01 Sample ID: 408162 Sample Dates: 4/11/2016-4/18/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <6.74E-03 O.OOE+OO 6.74E-03 Cs-134 <6.91E-03 O.OOE+OO 6.91E-03 Cs-137 <8.58E-03 O.OOE+OO 8.58E-03 Be-7 <6.96E-02 O.OOE+OO 6.96E-02 K-40 3.42E-D1 1.38E-01 1.32E-01 Sample ID: 409484 Sample Dates: 4/18/2016 - 4/25/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.00E-02 O.OOE+OO 1.00E-02 Cs-134 <6.70E-03 0.00E+OO 6.70E-03 Cs-137 <9.35E-03 O.OOE+OO 9.35E-03 Be-7 <5.08E-02 0.00E+OO 5.08E-02 K-40 2.73E-01 1.29E-01 1.43E-01 Sample ID: 409816 Sample Dates: 4/25/2016 - 5/2/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.03E-02 O.OOE+OO 1.03E-02 Cs-134 <6.47E-03 0.00E+OO 6.47E-03 Cs-137 <1.06E-02 O.OOE+OO 1.06E-02 Be-7 <6.47E-02 O.OOE+OO 6.47E-02 K-40 3.95E-01 1.68E-01 1.BBE-01 Sample ID: 410990 Sample Dates: 5/2/2016 -5/9/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <6.79E-03 O.OOE+OO 6.79E-03 Cs-134 <9.01E-03 O.OOE+OO 9.01E-03 Cs-137 <8.92E-03 O.OOE+OO 8.92E-03 Be-7 <3.59E-02 O.OOE+OO 3.59E-02 K-40 3.76E-01 1.63E-01 1.92E-01 Sample ID: 411462 Sample Dates: 5/9/2016 - 5/16/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.26E-03 O.OOE+OO 9.26E-03 Cs-134 <6.07E-03 O.OOE+OO 6.07E-03 Cs-137 <5.84E-03 O.OOE+OO 5.84E-03 Be-7 <6.45E-02 O.OOE+OO 6.45E-02 K-40 3.75E-01 1.35E-01 9.38E-02 Sample ID: 411795 Sample Dates: 5/16/2016 - 5/23/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.97E-03 O.OOE+OO 8.97E-03 Cs-134 <7.BOE-03 O.OOE+OO 7.60E-03 Cs-137 <5.52E-03 O.OOE+OO 5.52E-03 Be-7 <4.68E-02 O.OOE+OO 4.6BE-02 K-40 3.24E-01 1.31 E-01 1.18E-01 Sample ID: 412255 Sample Dates: 5/23/2016 - 5/31 /2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.01E-03 O.OOE+OO 8.01E-03 Cs-134 <7.09E-03 O.OOE+OO 7.09E-03 Cs-137 <7.84E-03 O.OOE+OO 7.84E-03 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 23 of 91 Duke Energy Annual Report -Appendix E

En:=:> 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 Sample Point 078>1 [ INDICATOR - WSW@ 0.53 miles ]

Sample ID: 412255 Sample Dates: 5/23/2016 - 5/31/2016 Nuclide Activity 2 Sigma Error MDA Be-7 <4.30E-02 O.OOE+OO 4.30E-02 K-40 2.89E-01 1.16E-01 9.94E-02 Sample ID: 412773 Sample Dates: 5/31/2016 - 6/6/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.05E-02 O.OOE+OO 1.05E-02 Cs-134 <8.85E-03 O.OOE+OO 8.85E-03 Cs-137 <7.47E-03 O.OOE+OO 7.47E-03 Be-7 <8.10E-02 0.00E+OO 8.10E-02 K-40 4.03E-01 1.56E-01 1.35E-01 Sample ID: 413388 Sample Dates: 6/6/2016 - 6/13/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <5.38E-03 O.OOE+OO 5.38E-03 Cs-134 <6.45E-03 O.OOE+OO 6.45E-03 Cs-137 <9.69E-03 O.OOE+OO 9.69E-03 Be-7 <5.59E-02 O.OOE+OO 5.59E-02 K-40 4.94E-01 1.51 E-01 2.85E-02 Sample ID: 413924 Sample Dates: 6/13/2016 -6/20/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.09E-03 O.OOE+OO 9.09E-03 Cs-134 <7.73E-03 O.OOE+OO 7.73E-03 Cs-137 <7.93E-03 O.OOE+OO 7.93E-03 Be-7 <4.75E-02 0.00E+OO 4.75E-02 K-40 5.10E-01 1.61 E-01 1.12E-01 Sample ID: 415062 Sample Dates: 6/20/2016 - 6/27/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <5.22E-03 O.OOE+OO 5.22E-03 Cs-134 <6.83E-03 O.OOE+OO 6.83E-03 Cs-137 <1.00E-02 0.00E+OO 1.00E-02 Be-7 <5.49E-02 O.OOE+OO 5.49E-02 K-40 4.63E-01 1.55E-01 1.17E-01 Sample ID: 415463 Sample Dates: 6/27/2016 - 7/5/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <2.76E-02 O.OOE+OO 2.76E-02 C_s-134 <3.31E-02 O.OOE+OO 3.31E-02 Cs-137 <3.55E-02 O.OOE+OO 3.55E-02 Be-7 <2.56E-01 O.OOE+OO 2.56E-01 K-40 1.97E+OO 6.37E-01 4.92E-01 Sample ID: 416440 Sample Dates: 7/5/2016 - 7/11/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.75E-03 O.OOE+OO 9.75E-03 Cs-134 <5.48E-03 O.OOE+OO 5.48E-03 Cs-137 <9.63E-03 O.OOE+OO 9.63E-03 Be-7 <5.04E-02 O.OOE+OO 5.04E-02 K-40 4.74E-01 1.85E-01 1.93E-01 Sample ID: 417053 Sample Dates: 7/11/2016 -7/18/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.76E-03 0.00E+OO 9.76E-03 Cs-134 <5.72E-03 O.OOE+OO 5.72E-03 Cs-137 <7.11E-03 O.OOE+OO 7.11E-03 Be-7 <6.0BE-02 O.OOE+OO 6.0BE-02 K-40 3.22E-01 1.40E-01 1.52E-01 Sample ID: 417444 Sample Dates: 7/18/2016 - 7/25/2016 Nuclide Activity 2 Sigma Error _MDA 1-131 <7.90E-03 O.OOE+OO 7.90E-03 Cs-134 <6.82E-03 O.OOE+OO 6.82E-03 Cs-137 <9.03E-03 O.OOE+OO 9.03E-03 Be-7 <5.83E-02 O.OOE+OO 5.83E-02 K-40 4.64E-01 1.45E-01 2.BOE-02 Sample ID: 417837 Sample Dates: 7/25/2016 - 8/1 /2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.07E-02 O.OOE+OO 1.07E-02 Cs-134 <4.97E-03 O.OOE+OO 4.97E-03 Cs-137 <1.06E-02 O.OOE+OO 1.06E-02 Be-7 <3.15E-02 O.OOE+OO 3.15E-02 K-40 4.73E-01 1.60E-01 1.14E-01 Sample ID: 418313 Sample Dates: 8/1/2016 - 8/8/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.02E-02 O.OOE+OO 1.02E-02 Cs-134 <8.93E-03 O.OOE+OO 8.93E-03 Cs-137 <1.21 E-02 O.OOE+OO 1.21E-02 EnRad Laboratories Report Generated @ 4/4/2017 13:40:53 Appendix E - Page 24 of 91 Duke Energy Annual Report -Appendix E En~ 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 Sample Point 078.1 [INDICATOR -WSW@0.53 miles]

Sample ID: 426027 Sample Dates: 10/10/2016 -10/17/2016 Nuclide Activity 2 Sigma Error MDA Be-7 <1.18E-02 O.OOE+OO 1.18E-02 K-40 5.34E-01 1.81E-01 1.63E-01 Sample ID: 426396 Sample Dates: 10/17/2016 -10/24/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.99E-03 0.00E+OO 8.99E-03 Cs-134 <3.67E-03 O.OOE+OO 3.67E-03 Cs-137 <8.76E-03 O.OOE+OO 8.76E-03 Be-7 <4.78E-02 O.OOE+OO 4.78E-02 K-40 2.19E-01 1.23E-01 1.53E-01 Sample ID: 427080 Sample Dates: 10/24/2016 -10/31/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.88E-03 O.OOE+OO 9.88E-03 Cs-134 <7.59E-03 O.OOE+OO 7.59E-03 Cs-137 <1.17E-02 O.OOE+OO 1.17E-02 Be-7 <4.64E-02 O.OOE+OO 4.64E-02 K-40 3.94E-01 1.38E-01 3.05E-02 Sample ID: 427748 Sample Dates: 10/31/2016 -1117/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.42E-03 O.OOE+OO 8.42E-03 Cs-134 <6.31E-03 O.OOE+OO 6.31 E-03 Cs-137 <7.02E-03 O.OOE+OO 7.02E-03 Be-7 <5.98E-02 O.OOE+OO 5.98E-02 K-40 4.85E-01 1.60E-01 1.14E-01 Sample ID: 428248 Sample Dates: 11/7/2016 -11/14/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.01E-03 O.OOE+OO 8.01E-03 Cs-134 <8.16E-03 O.OOE+OO 8.16E-03 Cs-137 <7.26E-03 O.OOE+OO 7.26E-03 Be-7 <1.19E-02 O.OOE+OO 1.19E-02 K-40 <4.01E-01 O.OOE+OO 4.01E-01 Sample ID: 428924 Sample Dates: 11/14/2016 -11/21/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <2.62E-02 O.OOE+OO 2.62E-02 Cs-134 <1.03E-02 O.OOE+OO 1.03E-02 Cs-137 <1.27E-02 O.OOE+OO 1.27E-02 Be-7 <1.13E-01 O.OOE+OO 1.13E-01 K-40 7.17E-01 2.42E-01 1.81 E-01 Sample ID: 429426 Sample Dates: 11/21/2016 -11/28/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.58E-03 O.OOE+OO 9.58E-03 Cs-134 <6.84E-03 O.OOE+OO 6.84E-03 Cs-137 <7.23E-03 O.OOE+OO 7.23E-03 Be-7 <4.22E-02 O.OOE+OO 4.22E-02 K-40 4.85E-01 1.48E-01 2.80E-02 Sample ID: 429986 Sample Dates: 11128/2016 -12/5/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.89E-03 0.00E+OO 7.89E-03 Cs-134 <8.SOE-03 O.OOE+OO 8.50E-03 Cs-137 <8.73E-03 O.OOE+OO 8.73E-03 Be-7 <7.54E-02 O.OOE+OO 7.54E-02 K-40 4.37!=-01 1.45E-01 3.04E-02 Sample ID: 430612 Sample Dates: 12/5/2016 - 12/12/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <5.94E-03 O.OOE+OO 5.94E-03 Cs-134 <6.74E-03 O.OOE+OO 6.74E-03 Cs-137 <7.79E-03 0.00E+OO 7.79E-03 Be-7 <6.1 OE-02 O.OOE+OO 6.10E-02 K-40 3.02E-01 1.31 E-01 1.33E-01 Sample ID: 431094 Sam pie Dates: 12/12/2016 - 12/19/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.BOE-03 O.OOE+OO 8.80E-03 Cs-134 <8.43E-03 O.OOE+OO 8.43E-03 Cs-137 <4.62E-03 O.OOE+OO 4.62E-03 Be-7 <6.84E-02 O.OOE+OO 6.84E-02 K-40 4.28E-01 1.56E-01 1.40E-01 Sample ID: 431494 Sample Dates: 12/19/2016 -12/27/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.21E-03 O.OOE+OO 8.21 E-03 Cs-134 <6.69E-03 O.OOE+OO 6.69E-03 Cs-137 <B.29E-03 O.OOE+OO 6.29E-03 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 26 of 91 Duke Energy Annual Report -Appendix E En3> 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 Sample Point 078.1 ['INDICATOR - WSW@0.53 miles]

Sample ID: 431494 Samp.le Dates: 12/19/2016 -12/27/2016 Nuclide Activity 2 Sigma Error MDA Be-7 <3.18E-02 O.OOE+OO 3.18E-02 K-40 5.02E-01 1.42E-01 2.43E-02 Sample Point 079 [INDICATOR - NE@ 0.56 miles]

Sample ID: 398730 Sample Dates: 12/28/2015 -1/5/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.90E-02 O.OOE+OO 1.90E-02 Cs-134 <1.21E-02 O.OOE+OO 1.21 E-02 Cs-137 <8.73E-03 O.OOE+OO B.73E-03 Be-7 <B.21E-02 O.OOE+OO 8.21E-02 K-40 6.29E-01 2.34E-01 2.36E-01 Sample ID: 398988 Sample Dates: 1/5/2016 -1/11/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.17E-03 0.00E+OO 9.17E-03 Cs-134 <7.71E-03 O.OOE+OO 7.71 E-03 Cs-137 <1.20E-02 O.OOE+OO 1.20E-02 Be-7 <8.88E-02 O.OOE+OO 8.BBE-02 K-40 4.77E-01 1.97E-01 2.12E-01 Sample ID: 399295 Sample Dates: 1/11/2016 -1/18/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.54E-02 O.OOE+OO 1.54E-02 Cs-134 <1.40E-02 O.OOE+OO 1.40E-02 Cs-137 <1.54E-02 O.OOE+OO 1.54E-02 Be-7 <8.54E-02 O.OOE+OO 8.54E-02 K-40 <5.11E-01 O.OOE+OO 5.11E-01 Sample ID: 400036 Sample Dates: 1/18/2016 -1/25/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <6.99E-03 O.OOE+OO 6.99E-03 Cs-134 <7.14E-03 O.OOE+OO 7.14E-03 Cs-137 <7.55E-D3 O.OOE+OO 7.55E-03 Be-7 <6.0BE-02 O.OOE+OO 6.0BE-02 K-40 2.97E-01 1.37E-01 1.51E-01 Sample ID: 400398 Sample Dates: 1/25/2016 - 2/1/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.51 E-02 O.OOE+OO 1.51 E-02 Cs-134 <1.22E-02 O.OOE+OO 1.22E-02 Cs-137 <1.70E-02 O.OOE+OO 1.70E-02 Be-7 <8.39E-02 O.OOE+OO 8.39E-02 K-40 6.89E-01 2.42E-01 1.93E-01 Sample ID: 401036 Sample Dates: 211/2016 -2/8/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.28E-03 O.OOE+OO 8.28E-03 Cs-134 <8.84E-03 O.OOE+OO 8.84E-03 Cs-137 <8.31E-03 O.OOE+OO 8.31E-03 Be-7 <6.28E-02 O.OOE+OO 6.28E-02 K-40 <3.03E-01 O.OOE+OO 3.03E-01 Sample ID: 401390 Sample Dates: 2/8/2016 - 2/15/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.26E-03 0.00E+OO 8.26E-03 Cs-134 <8.68E-03 O.OOE+OO 8.68E-03 Cs-137 <8.16E-03 O.OOE+OO 8.16E-03 Be-7 <5.34E-02 a°.OOE+OO 5.34E-02 K-40 4.47E-01 1.48E-01 3.10E-02 Sample ID: 401835 Sample Dates: 2/15/2016 - 2/22/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.20E-02 O.OOE+OO 1.20E-02 Cs-134 <9.56E-03 O.OOE+OO 9.56E-03 Cs-137 <6.33E-03 O.OOE+OO 6.33E-03 Be-7 <4.74E-02 O.OOE+OO 4.74E-02 K-40 4.48E-01 1.48E-01 3.11 E-02 Sample ID: 402356 Sample Dates: 2/22/2016 - 2/29/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.94E-03 O.OOE+OO 7.94E-03 Cs-134 <7.BBE-03 O.OOE+OO 7.88E-03 Cs-137 <7.04E-03 O.OOE+OO 7.04E-03 Be-7 <4.64E-02 O.OOE+OO 4.64E-02 K-40 5.08E-01 1.61 E-01 1.22E-01 Sample ID: 403080 Sample Dates: 2/29/2016 - 3nt20i6 Nuclide Activity 2 Sigma Error MDA 1-131 <1.01 E-02 O.OOE+OO 1.01 E-02 Cs-134 <7.79E-03 O.OOE+OO 7.79E-03 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 27 of 91 Duke Energy Annual Report - Appendix E

En:> 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 Sample Point 079 [INDICATOR~* NE@ 0.56 miles]

Sample ID: 403080 Sample Dates: 2/29/2016 - 3/7/2016 Nuclide Activity 2 Sigma Error MDA Cs-137 <8.98E-03 O.OOE+OO 8.98E-03

Be-7 <5.36E-02 O.OOE+OO 5.36E-02 K-40 3.50E-01 1.40E-01 1.14E-01 Sample ID: 404571 Sample Dates: 3/7/2016 - 3/14/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.01E-02 O.OOE+OO 1.01 E-02 Cs-134 <4.01E-D3 0.00E+OO 4.01 E-03 Cs-137 <8.87E-03 O.OOE+OO 8.87E-03 Be-7 <5.30E-02 O.OOE+OO 5.30E-02 K-40 3.81E-01 1.54E-01 1.53E-01 Sample ID: 405438 Sample Dates: 3/14/2016 -3/21/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.25E-03 O.OOE+OO 7.25E-03 Cs-134 <4.52E-03 O.OOE+OO 4.52E-03 Cs-137 <9.0BE-03 O.OOE+OO 9.0BE-03 Be-7 <4.26E-02 O.OOE+OO 4.26E-02 K-40 2.86E-01 1.34E-01 1.48E-01 Sample ID: 406069 Sample Dates: 3/21/2016 -3/28/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.46E-03 O.OOE+OO 7.46E-03 Cs-134 <6.01E-03 O.OOE+OO 6.01 E-03 Cs-137 <7.47E-03 O.OOE+OO 7.47E-03 Be-7 <4.34E-02 O.OOE+OO 4.34E-02 K-40 2.37E-01 1.21 E-01 1.38E-01 Sample ID: 406428 Sample Dates: 3/28/2016 - 4/4/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.03E-02 O.OOE+OO 1.03E-02 Cs-134 <8.12E-03 O.OOE+OO 8.12E-03 Cs-137 <6.23E-03 O.OOE+OO 6.23E-03 Be-7 <4.78E-02 O.OOE+OO 4}8E-02 K-40 4.41 E-01 1.46E-01 3.07E-02 Sample ID: 407602 Sample Dates: 4/4/2016 -4/11/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.86E-03 0.00E+OO 9.86E-03 Cs-134 <7.95E-03 O.OOE+OO 7.95E-03 Cs-137 <9.16E-03 O.OOE+OO 9.16E-03 Be-7 <5.48E-02 O.OOE+OO 5.48E-02 K-40 3.77E-01 1.60E-01 1.67E-01 Sample ID: 408163 Sample Dates: 4/11/2016 -4/18/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.36E-03 O.OOE+OO 9.36E-03 Cs-134 <6.58E-03 O.OOE+OO 6.58E-03 Cs-137 <6.71E-03 0.00E+OO 6.71 E-03 Be-7 <5.31 E-02 O.OOE+OO 5.31 E-02 K-40 3.03E-01 1.15E-01 2.83E-02 Sample ID: 409485 Sample Dates: 4/18/2016 - 4/25/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.55E-03 O.OOE+OO 8.55E-03 Cs-134 <6.92E-03 O.OOE+OO 6.92E-03 Cs-137 <1.09E-02 O.OOE+OO 1.09E-02 Be-7 <5.60E-02 O.OOE+OO 5.60E-02 K-40 4.01E-01 1.45E-01 1.06E-01 Sample ID: 409817 Sample Dates: 4/25/2016 -5/2/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.51 E-03 O.OOE+OO 7.51E-03 cs-134 <6.66E-03 0.00E+OO 6.66E-03 Cs-137 <6.BOE-03 O.OOE+OO 6.BOE-03 Be-7 <6.41 E-02 O.OOE+OO 6.41 E-02 K-40 3.63E-01 1.48E-01 1.51E-01 Sample ID: 410991 Sample Dates: 5/2/2016 -5/9/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.09E-03 O.OOE+OO 9.09E-03 Cs-134 <7.75E-03 0.00E+OO 7.75E-03 Cs-137 <7.95E-03 O.OOE+OO 7.95E-03 Be-7 <6.24E-02 O.OOE+OO 6.24E-02 K-40 4.49E-01 1.51 E-01 1.11E-01 Sample ID: 411463 Sample Dates: 5/9/2016 - 5/16/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.14E-03 0.00E+OO 8.14E-03 Cs-134 <7.76E-03 O.OOE+OO 7.76E-03 Report Generated @4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 28 of 91 Duke Energy Annual Report - Appendix E

En*~ 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: AIR RADIOIODINE Concentration {Activity): pCifm3 Sample Point 079 [ INDICATOR - NE@ 0.56.miles]

Sample ID: 411463 Sample Dates: 5/9/2016 - 5/1G/2016 Nuclide Activity 2 Sigma Error MDA Cs-137 <8.20E-03 O.OOE+OO 8.20E-03 Be-7 <6.69E-02 0.00E+OO 6.69E-02 K-40 4.09E-01 1.48E-01 1.06E-01 Sample ID: 411796 Sample Dates: 5/16/2.016 -5/23/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.53E-03 O.OOE+OO 8.53E-03 Cs-134 <6.42E-03 O.OOE+OO 6.42E-03 Cs-137 <9.96E-03 0.00E+OO 9.96E-03 Be-7 <6.86E.-02 O.OOE+OO 6.86E-02 K-40 3.81 E-01 1.45E-01 1.19E-01 Sample ID: 412256 Sample Dates: 5/23/2016 - 5/31/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <6.33E-03 O.OOE+OO 6.33E-03 Cs-134 <5.86E-03 O.OOE+OO 5.86E-03 Cs-137 <5.63E-03 O.OOE+OO 5.63E-03 Be-7 <3.66E-02 O.OOE+OO 3.66E-02 K-40 3.88E-01 1.30E-01 2.77E-02 Sample ID: 412774 Sample Dates: 5/31 /2016 - 6/6/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.46E-03 O.OOE+OO 9.46E-03 Cs-134 <7.29E-03 O.OOE+OO 7.29E-03 Cs-137 <6.41E-03 O.OOE+OO 6.41 E-03 Be-7 <5.36E-02 O.OOE+OO 5.36E-02 K-40 5.07E-01 1.73E-01 1.32E-01 Sample ID: 413389 Sample Dates: 6/6/2016 - 6/13/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.14E-03 0.00E+OO 8.14E-03 Cs-134 <7.10E-03 O.OOE+OO 7.10E-03 Cs-137 <8.84E-03 O.OOE+OO 8.84E-03 Be-7 <6.37E-02 O.OOE+OO 6.37E-02 K-40 3.82E-01 1.38E-01 1.01 E-01 Sample ID: 413925 Sample Dates: 6/13/2016 - 6/20/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.02E-02 O.OOE+OO 1.02E-02 Cs-134 <5.67E-03 O.OOE+OO 5.67E-03 Cs-137 <8.58E-03 O.OOE+OO 8.58E-03 Be-7 <4.58E-02 O.OOE+OO 4.58E-02 K-40 4.43E-01 1.53E-01 1.12E-01 Sample ID: 415063 Sample Dates: 6/20/2016 - 6/27/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.17E-02 O.OOE+OO 1.17E-02 Cs-134 <8.45E-03 O.OOE+OO 8.45E-03 Cs-137 <7.90E-03 O.OOE+OO 7.90E-03 Be-7 <5.51 E-02 O.OOE+OO 5.51E-02 K-40 5.88E-01 1.65E-01 2.80E-02 Sample ID: 415464 Sample Dates: 6/27/2016 - 7/5/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.16E-03 O.OOE+OO 7.16E-03 Cs-134 <5.48E-03 O.OOE+OO 5.48E-03 Cs-137 <5.58E-03 O.OOE+OO 5.58E-03 Be-7 <5.09E-02 O.OOE+OO 5.09E-02.

K-40 2.84E-01 1.04E-01 2.41 E-02 Sample ID: 416441 Sample Dates: 7/5/2016 -7/11/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.01E-02 O.OOE+OO 1.01 E-02 Cs-134 <8.44E-03 O.OOE+OO 8.44E-03 Cs-137 <7.43E-03 O.OOE+OO 7.43E-03 Be-7 <6.17E-02 O.OOE+OO 6.17E-02 K-40 4.45E-01 1.59E-01 3.66E-02 Sample ID: 417054 Sample Dates: 7/1112016 - 7/18/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <4.59E-03 O.OOE+OO 4.59E-03 Cs-134 <8.09E-03 O.OOE+OO 8.09E-03 Cs-137 <1.00E-02 O.OOE+OO 1.00E-02 Be-7 <7.53E-02 O.OOE+OO 7.53E-02 K-40 3.83E-01 1.47E-01 1.25E-01 Sample ID: 417445 Sample Dates: 7/1812016 -7125/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.09E-02 O.OOE+OO 1.09E-02 Cs-134 <6.62E-03 O.OOE+OO 6.62E:o3 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 29 of 91 Duke Energy Annual Report -Appendix E EnJ) 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: AIR RADIOIODINE Concentration {Activity): pCi/m3 Sample Point 079 [ INDICATOR - NE @ 0.56 miles]

Sample ID: 417445 Sample Dates: 7/18/2016 - 7/25/2016 Nuclide Activity 2 Sigma Error MDA Cs-137 <8.97E-03 O.OOE+OO 8.97E-03 Be-7 <5.78E-02 O.OOE+OO 5.78E-02 K-40 4.53E-01 1.58E-01 1.16E-01 Sample ID: 417838 Sample Dates: 7125/2016 - 8/1/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.04E-02 O.OOE+OO 1.04E-02 Cs-134 <9.11 E-03 O.OOE+OO 9.11E-03 Cs-137 <9.57E-03 O.OOE+OO 9.57E-03 Be-7 <5.74E-02 O.QOE+OO 5.74E-02 K-40 4.12E-01 1.42E-01 3.10E-02 Sample ID: 418314 Sample Dates: 811/2016 - 8/8/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.09E-02 O.OOE+OO 1.09E-02 Cs-134 <7.73E-03 O.OOE+OO 7.73E-03 Cs-137 <8.92E-03 O.OOE+OO 8.92E-03 Be-7 <4.72E-02 O.OOE+OO 4.72E-02 K-40 3.05E-01 1.28E-01 1.02E-01 Sample ID: 419032 Sample Dates: 8/8/2016 - 8/15/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.02E-03 O.OOE+OO 8.02E-03 Cs-134 <7.58E-03 O.OOE+OO 7.58E-03 Cs-137 <8.75E-03 O.OOE+OO B.75E-03 Be-7 <5.64E-02 O.OOE+OO 5.64E-02 K-40 3.79E-01 1.48E-01 1.33E-01 Sample ID: 419530 Sample Dates: 8/15/2016 - 8/22/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.29E-03 O.OOE+OO 8.29E-03 Cs-134 <8.32E-03 O.OOE+OO 8.32E-03 Cs-137 <B.27E-03 O.OOE+OO 8.27E-03 Be-7 <6.26E-02 O.OOE+OO 6.26E-02 K-40 3.95E-01 1.39E-01 3.14E-02 Sample ID: 420059 Sample Dates: 8/22/2016 -8/29/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.14E-02 O.OOE+OO 1.14E-02 Cs-134 <7.71E-03 O.OOE+OO 7.71E-03 Cs-137 <9.57E-03 O.OOE+OO 9.57E-03 Be-7 <4.07E-02 O.OOE+OO 4.07E-02 K-40 3.68E-01 1.55E-01 1.62E-01 Sample ID: 420605 Sample Dates: 8/29/2016 - 9/6/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.30E-03 O.OOE+OO 7.30E-03 Cs-134 <6.32E-03 O.OOE+OO 6.32E-03 Cs-137 <6.28E-03 O.OOE+OO 6.2BE-03 Be-7 <5.68E-02 O.OOE+OO 5.68E-02 K-40 3.76E-01 1.30E-01 9.99E-02 Sample ID: 421471 Sample Dates: 9/6/2016 - 9/12/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <B.83E-03 O.OOE+OO B.83E-03 Cs-134 <B.31 E-03 O.OOE+OO 8.31E-03 Cs-137 <7.40E-03 O.OOE+OO 7.40E-03 Be-7 <6.31E-02 O.OOE+OO 6.31E-02 K-40 6.01E-01 1.77E-01 3.20E-02 Sample ID: 422607 Sample Dates: 9/12/2016 - 9/19/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <6.56E-03 O.OOE+OO 6.56E-03 Cs-134 <7.40E-03 0.00E+OO 7.40E-03 Cs-137 <6.59E-03 0.00E+OO 6.59E-03 Be-7 <5.24E-02 O.OOE+OO 5.24E-02 K-40 4.42E-01 1.42E-01 2.85E-02 Sample ID: 423350 Sample Dates: 9/19/2016 - 9/26/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.53E-03 O.OOE+OO 8.53E-03 Cs-134 <7.55E-03 O.OOE+OO 7.55E-03 Cs-137 <1.06E-02 O.OOE+OO 1.06E-02 Be-7 <4.60E-02 O.OOE+OO 4.60E-02 K-40 4.25E-01 1.63E-01 1.58E-01 Sample ID: 424490 Sample Dates: 9/26/2016 - 10/3/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.12E-03 O.OOE+OO 8.12E-03 Cs-134 <7.07E-03 O.OOE+OO 7.07E-03 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 30 of 91 Duke Energy Annual Report -Appendix E En:=> 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Anaiysis Report - 2016 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 Sample Point 079 [ INDICATOR - NE@ 0.56 miles]

Sample*l*D: 424490 Sample Dates: 9/26/2016 - 10/3/2016 Nuclide Activity 2 Sigma Error MDA Cs-137 <9.45E-03 0.00E+OO 9.45E-03 Be-7 <5.66E-02 O.OOE+OO 5.66E-02 K-40 3.79E-01 1.42E-01 1.01 E-01 Sample ID: 425486 Sample Dates: 10/3/2016 -10/10/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.24E-03 O.OOE+OO 9.24E-03 Cs-134 <6.12E-03 O.OOE+OO 6.12E-03 Cs-137 <7.61 E-03 O.OOE+OO 7.61 E-03 Be-7 <5.35E-02 O.OOE+OO 5.35E-02 K-40 3.84E-01 1.43E-01 1.32E-01 Sample ID: 426028 Sample Dates: 10/10/2016 - 10/17/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.78E-03 O.OOE+OO 8.78E-03 Cs-134 <7.28E-03 O.OOE+OO 7.28E-03 Cs-137 <7.71 E-03 O.OOE+OO 7.71 E-03 Be-7 <5.8DE-02 O.OOE+OO 5.80E-02 K-40 2.94E-01 1.35E-01 1.46E-01 Sample ID: 426397 Sample Dates: 10/17/2016 -10/24/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.15E-03 O.OOE+OO 9.15E-03 Cs-134 <5.74E-03 O.OOE+OO 5.74E-03 Cs-137 <4.87E-03 O.OOE+OO 4.87E-03 Be-7 <3.96E-02 O.OOE+OO 3.96E-02 K-40 <2.85E-01 O.OOE+OO 2.85E-01 Sample ID: 427081 Sample Dates: 10/24/2016 - 10/31 /2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.32E-02 O.OOE+OO 1.32E-02 Cs-134 <8.54E-03 O.OOE+OO 8.54E-03 Cs-137 <8.03E-03 O.OOE+OO 8.03E-03 Be-f <7.50E-02 o:ooE+oo 7.50E-02 K-40 3.28E-01 1.35E-01 1.16E-01 Sample ID: 427749 Sample Dates: 10/31/2016 -11/7/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.06E-03 O.OOE+OO 7.06E-03 Cs-134 <7.45E-03 O.OOE+OO 7.45E-03 Cs-137 <6.27E-03 O.OOE+OO 6.27E-03 Be-7 <5.74E-02 0.00E+OO 5.74E-02 K-40 <2.64E-01 O.OOE+OO 2.64E-01 Sample ID: 428249 Sample Dates: 11/7/2016 -11/14/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.63E-03 O.OOE+OO 9.63E-03 Cs-134 <8.13E-03 O.OOE+OO 8.13E-03 Cs-137 <6.51E-03 O.OOE+OO 6.51 E-03 Be-7 <5.59E-02 O.OOE+OO 5.59E-02 K-40 3.73E-01 1.29E-01 2.81E-02 Sample ID: 428925 Sample Dates: 11/14/2016 -11/21/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <2.62E-02 O.OOE+OO 2.62E-02 Cs-134 <1.59E-02 O.OOE+OO 1.59E-02 Cs-137 <1.30E-02 0.00E+OO 1.30E-02 Be-7 <1.06E-01 O.OOE+OO 1.06E-01 K-40 4.74E-01 2.15E-01 2.16E-01 Sample ID: 429427 Sample Dates: 11/21/2016 -11/28/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <6.17E-03 O.OOE+OO 6.17E-03 Cs-134 <7.32E-03 O.OOE+OO 7.32E-03 Cs-137 <6.53E-03 0.00E+OO 6.53E-03 Be-7 <4.71E-02 O.OOE+OO 4.71 E-02 K-40 4.35E-01 1.71E-01 1.90E-01 Sample ID: 429987 Sample Dates: 11/28/2016 -12/5/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.95E-03 O.OOE+OO 7.95E-03 Cs-134 <7.07E-03 O.OOE+OO 7.07E-03 Cs-137 <8.04E-03 O.OOE+OO 8.04E-03 Be-7 <5.24E-02 0.00E+OO 5.24E-02 K-40 <3.14E-01 O.OOE+OO 3.14E-01 Sample ID: 430613 Sample Dates: 12/5/2016 - 12/12/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.39E-03 0.00E+OO 9.39E-03 Cs-134 <5.63E-03 O.OOE+OO 5.63E-03 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 31 of91 Duke Energy Annual Report -Appendix E En~ 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: AIR RADIOIODINE Concentration {Activity): pCi/m3 Sample Point 079 [INDICATOR - NE @ 0.56 miles]

Sample ID: 430613 Sample Dates: 12/5/2016 -12/12/2016 Nuclide Activity 2 Sigma Error MDA Cs-137 <9.16E-03 O.OOE+OO 9.16E-03 Be-7 <3.88E-02 O.OOE+OO 3.88E-02 K-40 <2.89E-01 O.OOE+OO 2.89E-01 Sample ID: 431095 Sample Dates: 12/12/2016 -12/19/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.93E-03 O.OOE+OO 8.93E-03 Cs-134 <6.05E-03 O.OOE+OO 6.05E-03 Cs-137 <8.38E-03 O.OOE+OO B.3BE-03 Be-7 <5.95E-02 O.OOE+OO 5.95E-02 K-40 3.30E-01 1.40E-01 1.26E-01 Sample ID: 431495 Sample Dates: 12/19/2016 -12/27/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.91E-03 O.OOE+OO 7.91 E-03 Cs-134 <6.86E-03 0.00E+OO 6.86E-03 Cs-137 <7.04E-03 O.OOE+OO 7.04E-03 Be-7 <4.21E-02 O.OOE+OO 4.21 E-02 K-40 3.69E-01 1.21 E-01 2.50E-02 Sample Point 081 [ CONTROL - SE@ 9.33 miles]

Sample ID: 398731 Sample Dates: 12/28/2015 - 115/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.55E-02 O.OOE+OO 1.55E-02 Cs-134 <1.28E-02 O.OOE+OO 1.28E-02 Cs-137 <8.BOE-03 O.OOE+OO 8.BOE-03 Be-7 <8.29E-02 O.OOE+OO 8.29E-02 K-40 7.00E-01 2.30E-01 1.78E-01 Sample ID: 398989 Sample Dates: 1/5/2016 -1/11/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.84E-03 O.OOE+OO 9.84E-03 Cs-134 <1.06E-02 O.OOE+OO 1.06E-02 Cs-137 <1.02E-02 O.OOE+OO 1.02E-D2 Be-7 <5.61E-02 O.OOE+OO 5.61 E-02 K-40 4.61E-01 1.69E-01 1.38E-D1 Sample ID: 399296 Sample Dates: 1/11/2016 -1118/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.66E-02 O.OOE+OO 1.66E-02 Cs-134 <1.33E-02 O.OOE+OO 1.33E-02 Cs-137 <1.44E-02 O.OOE+OO 1.44E-02 Be-7 <7.73E-02 O.OOE+OO 7.73E-02 K-40 <4.77E-01 O.OOE+OO 4.77E-01 Sample ID: 400037 Sample Dates: 1/18/2016 - 1/25/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.76E-03 O.OOE+OO 8.76E-03 Cs-134 <7.38E-03 O.OOE+OO 7.38E-03 Cs-137 <8.60E-03 O.OOE+OO B.6DE-03 Be-7 <3.68E-02 O.OOE+OO 3.68E-02 K-40 4.3DE-01 1.40E-01 2.84E-02 Sample ID: 400399 Sample Dates: 1 /25/2016 - 2/1 /2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.79E-02 O.OOE+OO 1.79E-02 Cs-134 <1.45E-02 O.OOE+OO 1.45E-02 Cs-137 <1.52E-02 O.OOE+OO 1.52E-02 Be-7 <1.12E-01 O.OOE+OO 1.12E-01 K-40 5.75E-01 2.06E-01 4.72E-02 Sample ID: 401037 Sample Dates: 2/1/2016 - 2/8/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.55E-03 O.OOE+OO 7.55E-03 Cs-134 <8.81E-03 O.OOE+OO 8.81 E-03 Cs-137 <7.55E-03 O.OOE+OO 7.55E-03 Be-7 <8.37E-02 O.OOE+OO 8.37E-02 K-40 4.64E-01 1.58E-01 1.27E-01 Sample ID: 401391 Sample Dates: 2/8/2016 -2/15/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.70E-03 O.OOE+OO 1.70E-03 Cs-134 <6.89E-03 O.OOE+OO 6.89E-03 Cs-137 <7.29E-03 O.OOE+OO 7.29E-03 Be-7 <6.94E-02 O.OOE+OO 6.94E-02 K-40 3.17E-01 1.27E-01 1.03E-01 Sample ID: 401836 "Sample Dates: 2/15/2016 -2/2212016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.63E-03 O.OOE+OO 8.63E-03 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 32 of 91 Duke Energy Annual Report -Appendix E En~ 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: AIR RADIOIODINE Concentration {Activity): pCi/m3 Sample Point 08f'[ CONTROL - SE @ S'.33 miles]

Sample ID: 401836 Sample Dates: 2/15/2016 - 2/22/2016 Nuclide Activity 2 Sigma Error MDA Cs-134 <7.24E-03 O.OOE+OO 7.24E-03 Cs-137 <8.44E-03 O.OOE+OO 8.44E-03 Be-7 <5.83E-02 O.OOE+OO 5.83E-02 K-40 4.54E-01 1.50E-01 1.05E-01 Sample ID: 402357 Sample Dates: 2/22/2016 - 2/29/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.06E-03 O.OOE+OO 8.06E-03 Cs-134 <6.37E-03 O.OOE+OO 6.37E-03 Cs-137 <9.89E-03 O.OOE+OO 9.89E-03 Be-7 <4.63E-02 O.OOE+OO 4.63E-02 K-40 3.13E-01 1.31 E-01 1.13E-01 Sample ID: 403081 Sample Dates: 2/29/2016 - 317/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.65E-03 O.OOE+OO 8.65E-03 Cs-134 <7.79E-03 O.OOE+OO 7.79E-03 Cs-137 <6.56E-03 O.OOE+OO 6.56E-03 Be-7 <4.29E-02 O.OOE+OO 4.29E-02 K-40 4.14E-01 1.43E-01 9.85E-02 Sample ID: 404572 Sample Dates: 317/2016 - 3/14/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.07E-02 O.OOE+OO 1.07E-02 Cs-134 <5.19E-03 O.OOE+OO 5.19E-03 Cs-137 <8.98E-03 O.OOE+OO 8.98E-03 Be-7 <5.16E-02 O.OOE+OO 5.16E-02 K-40 5.32E-01 1.55E-01 2.77E-02 Sample ID: 405439 Sample Dates: 3/14/2016 - 3/21/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.23E-03 O.OOE+OO 9.23E-03 Cs-134 <8.12E-03 O.OOE+OO 8.12E-03 l

Cs-137 <7.26E-03 O.OOE+OO 7.26E-03 Be-7 <5.95E-02 O.OOE+OO 5.95E-02 K-40 3.87E-01 1.40E-01 1.06E-01 Sample ID: 406070 Sample Dates: 3/2112016 - 3/28/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.40E-03 O.OOE+OO 9.40E-03 Cs-134 <7.69E-03 O.OOE+OO 7.69E-03 Cs-137 <5.58E-03 O.OOE+OO 5.58E-03 Be-7 <5.57E-02 O.OOE+OO 5.57E-02 K-40 3.65E-01 1.36E-01 1.06E-01 Sample ID: 406429 Sample Dates: 3/28/2016 - 4/4/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.07E-02 O.OOE+OO 1.07E-02 Cs-134 <6.78E-03 0.00E+OO 6.78E-03 Cs-137 <7.81E-03 O.OOE+OO 7.81 E-03 Be-7 <3.69E-02 O.OOE+OO 3.69E-02 K-40 4.59E-01 1.43E-01 2.77E-02 Sample ID: 407603 Sample Dates: 4/4/2016 - 4/11/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.13E-02 O.OOE+OO 1.13E-02 Cs-134 <3.97E-03 O.OOE+OO 3.97E-03 Cs-137 <1.01E-02 O.OOE+OO 1.01 E-02 Be-7 <5.73E-02 O.OOE+OO 5.73E-02 K-40 4.27E-01 1.55E-01 1.27E-01 Sample ID: 408164 Sample Dates: 4/11/2016 - 4/18/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.10E-03 O.OOE+OO 9.10E-03 Cs-134 <8.68E-03 O.OOE+OO 8.68E-03 Cs-137 <7.31E-03 O.OOE+OO 7.31 E-03 Be-7 <4.79E-02 O.OOE+OO 4.79E-02 K-40 3.32E-01 1.39E-01 1.27E-01 Sample ID: 409486 Sample Dates: 4/18/2016 -4/25/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.38E-03 O.OOE+OO 7.38E-03 Cs-134 <9.01E-03 0.00E+OO 9.01 E-03 Cs-137 <4.55E-03 O.OOE+OO 4.55E-03 Be-7 <6.36E-02 O.OOE+OO 6.36E-02 K-40 3.63E-01 1.26E-01 2.81E-02 Sample ID: 409818 Sample Dates: 4/25/2016 - 5/2/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.11E-02 0.00E+OO 1.11 E-02 Report Generated @4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 33 of 91 Duke Energy Annual Report -Appendix E En:> 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCilm3 Sample Point 081 [ CONTROi:: - SE@ 9.33 miles] ..

Sample ID: 409818 Sample Dates: 4/25/2016 - 5/2/2016 Nuclide Activity 2 Sigma Error MDA Cs-134 <6.62E-03 O.OOE+OO 6.62E-03 Cs-137 <6.36E-03 0.00E+OO 6.36E-03 Be-7 <5.31E-02 O.OOE+OO 5.31 E-02 K-40 4.45E-01 1.54E-01 1.04E-01 Sample ID: 410992 Sample Dates: 5/2/2016 - 519/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.43E-03 O.OOE+OO 7.43E-03 Cs-134 <8.00E-03 O.OOE+OO 8.00E-03 C~-137 <1.15E-02 O.OOE+OO 1.15E-02 Be-7 <5.13E-02 O.OOE+OO 5.13E-02 K-40 4.45E-01 1.46E-01 3.02E-02 Sample ID: 411464 Sample Dates: 519/2016 -5/1612016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.02E-02 O.OOE+OO 1.02E-02 Cs-134 <7.26E-03 O.OOE+OO 7.26E-03 Cs-137 <9.00E-03 O.OOE+OO 9.00E-03 Be-7 <6.57E-02 O.OOE+OO 6.57E-02 K-40 3.39E-01 1.32E-01 1.11 E-01 Sample ID: 411797 Sample Dates: 5/16/2016 - 5/2312016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.00E-02 O.OOE+OO 1.00E-02 Cs-134 <6.47E-03 O.OOE+OO 6.47E-03 Cs-137 <8.66E-03 O.OOE+OO 8.66E-03 Be-7 <4.27E-02 O.OOE+OO 4.27E-02 K-40 3.91 E-01 1.31E-01 2.79E-02 Sample ID: 412257 Sample Dates: 512312016 - 5131/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.94E-03 O.OOE+OO 9.94E-03 Cs-134 <6.78E-03 O.OOE+OO 6.78E-03 1

Cs-137 <6.96E-03 O.OOE+OO 6.96E-03 Be-7 <5.20E-02 O.OOE+OO 5.20E-02 K-40 <2.33E-01 O.OOE+OO 2.33E-01 Sample ID: 412775 Sample Dates: 5/31/2016 - 6/6/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <6.98E-03 O.OOE+OO 6.98E-03 Cs-134 <1.11 E-02 0.00E+OO 1.11 E-02 Cs-137 <7.62E-03 O.OOE+OO 7.62E-03 Be-7 <6.45E-02 O.OOE+OO 6.45E-02 K-40 4.39E-01 1.51 E-01 3.30E-02 Sample ID: 413390 Sample Dates: 6/6/2016 - 6/13/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.04E-03 O.OOE+OO 9.04E-03 Cs-134 <7.72E-03 O.OOE+OO 7.72E-03 Cs-137 <9.58E-03 O.OOE+OO 9.58E-03 Be-7 <4.74E-02 O.OOE+OO 4.74E-02 K-40 3.78E-01 1.35E-01 3.11 E-02 Sample ID: 413926 Sample Dates: 6/13/2016 - 6/20/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.96E-03 O.OOE+OO 7.96E-03 Cs-134 <5.36E-03 O.OOE+OO 5.36E-03 Cs-137 <7.44E-03 O.OOE+OO 7.44E-03 Be-7 <5.65E-02 O.OOE+OO 5.65E-02 K-40 3.67E-01 1.34E-01 9.97E-02 Sample ID: 415064 Sample Dates: 6/20/2016 - 6/27/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.97E-03 O.OOE+OO 8.97E-03 Cs-134 <7.66E-03 O.OOE+OO 7.66E-03 Cs-137 <8.46E-03 O.OOE+OO 8.46E-03 Be-7 <6.47E-02 O.OOE+OO 6.47E-02 K-40 3.28E-01 1.32E-01 1.18E-01 Sample ID: 415465 Sample Dates: 6/27/2016 - 7/5/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.28E-03 0.00E+OO 8.28E-03 Cs-134 <6.05E-03 O.OOE+OO 6.05E-03 Cs-137 <6.40E-03 O.OOE+OO 6.40E-03 Be-7 <3.74E-02 O.OOE+OO 3.74E-02 K-40 2.93E-01 1.07E-01 2.48E-02 Sample ID: 416442 Sample Dates: 7/5/2016 - 7/1112016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.83E-03 O.OOE+OO 9.83E-03 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 34 of 91 Duke Energy Annual Report -Appendix E En=9 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 Sample Point 081 [CONTROL - SE @ 9.33 miles ]

Sample ID: 416442 Sample Dates: 71512016 -1/11/2016 Nuclide Activity 2 Sigma Error MDA Cs-134 <8.11E-03 O.OOE+OO 8.11 E-03 Cs-137 <1.07E-02 0.00E+OO 1.07E-02 Be-7 <7.68E-02 O.OOE+OO 7.68E-02 K-40 4.27E-01 1.67E-01 1.54E-01 Sample ID: 417055 Sample Dates: 7/1112016 - 7/18/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.12E-03 D.OOE+OO 8.12E-03 Cs-134 <8.10E-D3 D.ODE+OD 8.10E-03 Cs-137 <6.50E-03 D.OOE+OO 6.50E-03 Be-7 <4.71E-02 D.OOE+OO 4.71E-02 K-40 3.22E-01 1.19E-01 2.81 E-02 Sample ID: 417446 Sample Dates: 7/1812016 -7/25/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.81E-03 O.OOE+OO 9.81 E-03 Cs-134 <6.48E-03 O.OOE+OO 6.48E-03 Cs-137 <8.05E-03 O.OOE+OO 8.05E-03 Be-7 <5.66E-02 O.OOE+OO 5.66E-02 K-40 3.86E-01 1.45E-01 1.14E-01 Sample ID: 417839 Sample Dates: 7/25/2016 - 8/1 /201 S Nuclide Activity 2 Sigma Error MDA 1-131 <7.38E-03 O.OOE+OO 7.38E-03 Cs-134 <7.21 E-03 O.OOE+OO 7.21 E-03 Cs-137 <7.16E-03 O.OOE+OO 7.16E-03 B~-7 <2.84E-02 O.OOE+OO 2.84E-02 K-40 3.75E-01 1.5BE-01 1.79E-01 Sample ID: 418315 Sample Dates: B/1/2016 -81812016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.02E-02 O.OOE+OO 1.02E-02 Cs-134 <6.81E-03 O.OOE+OO 6.81E-03 cs-137 <6.46E-03 O.OOE+OO 6.46E-03 Be-7 <2.86E-02 O.OOE+OO 2.86E-02 K-40 4.74E-01 1.46E-01 2.79E-02 Sample ID: 419033 Sample Dates: 8/8/2016 - 8/15/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.83E-03 O.OOE+OO 7.83E-03 Cs-134 <6.71E-03 0.00E+OO 6.71 E-03 Cs-137 <8.34E-03 O.OOE+OO 8.34E-03 Be-7 <5.74E-02 O.OOE+OO 5.74E-02 K-40 <3.23E-01 O.OOE+OO 3.23E-01 Sample ID: 419531 Sample Dates: 8/15/2016 - 8/2212016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.03E-03 O.OOE+OO 9.03E-03 Cs-134 <5.85E-03 O.OOE+OO 5.85E-03 Cs-137 <5.62E-03 O.OOE+OO 5.62E-03 Be-7 <5.88E-02 O.OOE+OO 5.BBE-02 K-40 4.77E-01 1.47E-01 2.81 E-02 Sample ID: 420060 Sample Dates: 8/22/2016 - 8/29/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.39E-03 O.OOE+OO 7.39E-03 Cs-134 <8.00E-03 O.OOE+OO 8.00E-03 Cs-137 <9.47E-03 O.OOE+OO 9.47E-03 Be-7 <4.16E-02 O.OOE+OO 4.16E-02 K-40 4.00E-01 1.42E-01 1.10E-01 Sample ID: 420606 Sample Dates: 8/29/2016 - 9/6/201 S Nuclide Activity 2 Sigma Error MDA 1-131 <6.85E-03 O.OOE+OO 6.85E-03 Cs-134 <7.80E-03 O.OOE+OO 7.80E-03 Cs-137 <5.40E-03 O.OOE+OO 5.40E-03 Be-7 <5.67E-02 O.OOE+OO 5.67E-02 K-40 2.85E-01 1.18E-01 1.02E-01 Sample ID: 421472 Sample Dates: 9/6/2016 - 9/12/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.16E-02 O.OOE+OO 1.16E-02 Cs-134 <7.59E-03 O.OOE+OO 7.59E-03 Cs-137 <7.75E-03 O.OOE+OO 7.75E-03 Be-7 <6.98E-02 O.OOE+OO 6.98E-02 K-40 4.49E-01 1.61 E-01 1.21E-01 Sample ID: 422608 Sample Dates: 9/1212016 - 9/19/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.74E-03 O.OOE+OO 8.i4E-03 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 35 of 91 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 Sample Point 081 [CONTROL - SE @ 9.33 miles]

Sample ID: 422608 Sample Dates: 9/12/2016-9/19/2016 Nuclide Activity 2 Sigma Error MDA Cs-134 <9.00E-03 O.OOE+OO 9.00E-03 Cs-137 <8.79E-03 O.OOE+OO 8.79E-03 Be-7 <4.70E-02 O.OOE+OO 4.70E-02 K-40 5.87E-01 1.71 E-01 3.06E-02 Sample ID: 423351 Sample Dates: 9/19/2016 -9/26/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.98E-03 O.OOE+OO 7.98E-03 Cs-134 <5.85E-03 O.OOE+OO 5.85E-03 Cs-137 <7.93E-03 O.OOE+OO 7.93E-03 Be-7 <3.64E-02 O.OOE+OO 3.64E-02 K-40 3.91E-01 1.38E-01 9.45E-02 Sample ID: 424491 Sample Dates: 9/26/2016 - 10/3/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.01E-03 O.OOE+OO 7.01E-03 Cs-134 <4.71E-03 O.OOE+OO 4.71E-03 Cs-137 <7.57E-03 O.OOE+OO 7.57E-03 Be-7 <4.35E-02 O.OOE+DO 4.35E-02 K-40 2.94E-01 1.30E-01 1.31E-01 Sample ID: 425487 Sample Dates: 10/3/2016 -10/10/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.03E-02 O.OOE+DO 1.03E-02 Cs-134 <6.40E-03 O.OOE+OO 6.40E-03 Cs-137 <5.63E-03 O.OOE+OO 5.63E-03 Be-7 <6.63E-02 O.OOE+OO 6.63E-02 K-40 3.54E-01 1.26E-01 2.82E-02 Sample ID: 426029 Sample Dates: 10/10/2016 -10/17/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.45E-03 O.OOE+OO 7.45E-03 Cs-134 <6.42E-03 O.OOE+DO 6.42E-03 Cs-137 <B.'71E-03 O.OOE+OO 8.71 E-03 Be-7 <4.61E-02 O.OOE+OO 4.61E-02 K-40 4.93E-01 1.73E-01 1.58E-01 Sample ID: 426398 Sample Dates: 10/17/2016 -10/24/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.90E-03 O.OOE+OO 8.90E-03 Cs-134 <6.75E-03 O.OOE+OO 6.75E-03 Cs-137 <4.38E-03 O.OOE+OO 4.38E-03 Be-7 <6.98E-02 O.OOE+OO 6.98E-02 K-40 3.78E-01 1.29E-01 2.??E-02 Sample ID: 427082 Sample Dates: 10/24/2016 -10/31/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.74E-03 O.OOE+OO 9.74E-03 Cs-134 <6.97E-03 O.OOE+OO 6.97E-03 Cs-137 <6.61E-03 O.OOE+OO 6.61 E-03 Be-7 <6.33E-02 O.OOE+OO 6.33E-02 K-40 4.33E-01 1.41E-01 2.86E-02 Sample ID: 427750 Sample Dates: 10/31/2016 -11/7/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.04E-02 O.OOE+OO 1.04E-02 Cs-134 <6.36E-03 O.OOE+OO 6.36E-03 Cs-137 <9.27E-03 O.OOE+OO 9.27E-03 Be-7 <7.13E-02 O.OOE+OO 7.13E-02 K-40 2.97E-01 1.38E-01 1.49E-01 Sample ID: 428250 Sample Dates: 11/7/2016 -11/14/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.03E-02 O.OOE+OO 1.03E-02 C9-134 <1.00E-02 O.OOE+OO 1.00E-02 Cs-137 <1.09E-02 O.OOE+OO 1.09E-02 Be-7 <6.73E-02 O.OOE+OO 6.73E-02 K-40 3.70E-01 1.34E-01 3.14E-02 Sample ID: 428926 Sample Dates: 11/14/2016 -11/21/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.86E-02 O.OOE+OO 1.86E-02 Cs-134 <1.24E-02 O.OOE+OO 1.24E-02 Cs-137 <1.11E-02 O.OOE+OO 1.11E-02 Be-7 <7.79E-02 O.OOE+OO 7.79E-02 K-40 4.15E-01 1.70E-01 1.55E-D1 Sample ID: 429428 Sample Dates: 11/21/2016 -11/28/2016 Nuclide Activity 2 Sigma Error MDA.

1-131 <9.77E-03 O.OOE+OO 9.??E-03 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 36 of 91 Duke Energy Annual Report -Appendix E En~ 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 Sample Point 081 [CONTROL - SE@ 9.33 miles]

Sample ID: 429428 Sample Dates: 11/21/2016 -11/28/2016 Nuclide Activity 2 Sigma Error MDA Cs-134 <6.98E-03 O.OOE+OO 6.98E-03 Cs-137 <7.38E-03 O.OOE+OO 7.38E-03 Be-7 <3.71E-02 O.OOE+OO 3.71E-02 K-40 3.96E-01 1.59E-01 1.68E-01 Sample ID: 429988 Sample Dates: 11/28/2016-12/512016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.00E-02 O.OOE+OO 1.00E-02 Cs-134 <7.61E-03 O.OOE+OO 7.61E-03 Cs-137 <4.93E-03 O.OOE+OO 4.93E-03 Be-7 <6.16E-02 O.OOE+OO 6.16E-02 K-40 4.66E-01 1.58E-01 1.12E-01 Sample ID: 430614 Sample Dates: 121512016 - 12/12/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.10E-03 O.OOE+OO 9.10E-03 Cs-134 <6.35E-03 O.OOE+OO 6.35E-03 Cs-137 <9.26E-03 O.OOE+OO 9.26E-03 Be-7 <4.56E-02 O.OOE+OO 4.56E-02 K-40 5.06E-01 1.76E-01 1.65E-01 Sample ID: 431096 Sample Dates: 12/12/2016 -12/19/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.24E-02 O.OOE+OO 1.24E-02 Cs-134 <1.35E-03 O.OOE+OO 1.35E-03 Cs-137 <9.82E-03 O.OOE+OO 9.82E-03 Be-7 <3.75E-02 O.OOE+OO 3.75E-02 K-40 3.12E-01 1.37E-01 1.42E-01 Sample ID: 431496 Sample Dates: 12/19/2016 -12/27/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.02E-03 O.OOE+OO 9.02E-03 Cs-134 <7.07E-03 O.OOE+OO 7.07E-03 Cs-137 <7.67E-03 O.OOE+OO 7.67E-03 Be-7 <6.32E-02 O.OOE+OO 6.32E-02 K-40 4.11E-01 1.43E-01 1.14E-01 Sample Point 084 [INDICATOR - NNE@ 2.58 miles]

Sample ID: 398732 Sample Dates: 12/28/2015 -1/5/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.35E-02 O.OOE+OO 1.35E-02 Cs-134 <1.39E-02 O.OOE+OO 1.39E-02 Cs-137 <1.34E-02 O.OOE+OO 1.34E-02 Be-7 <9.48E-02 O.OOE+OO 9.48E-02 K-40 5.35E-01 1.86E-01 4.14E-02 Sample ID: 398990 Sample Dates: 1/5/2016 -1/11/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.05E-02 0.00E+OO 1.05E-02 Cs-134 <4.69E-03 O.OOE+OO 4.69E-03 Cs-137 <1.04E-02 0.00E+OO 1.04E-02 Be-7 <7.15E-02 O.OOE+OO 7.15E-02 K-40 6.13E-01 1.89E-01 3.61 E-02 Sample ID: 399297 Sample Dates: 1/11/2016 -1/1812016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.65E-02 O.OOE+OO 1.65E-02 Cs-134 <1.72E-02 O.OOE+OO 1.72E-02 Cs-137 <1.54E-02 0.00E+OO 1.54E-02 Be-7 <1.13E-01 O.OOE+OO 1.13E-01 K-40 4.94E-01 1.91E-01 4.78E-02 Sample ID: 400038 Sample Dates: 1/18/2016 -1/2512016 Nuclide Activity 2 Sigma Error MDA 1-131 <6.23E-03 O.OOE+OO 6.23E-03 Cs-134 <7.78E-03 O.OOE+OO 7.78E-03 Cs-137 <8.59E-03 O.OOE+OO 8.59E-03 Be-7 <5.57E-02 O.OOE+OO 5.57E-02 K-40 4.82E-01 1.49E-01 2.84E-02 Sample ID: 400400 Sample Dates: 112512016 - 21112016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.34E-02 O.OOE+OO 1.34E-02 Cs-134 <1.38E-02 O.OOE+OO 1.38E-02 Cs-137 <1.52E-02 O.OOE+OO 1.52E-02 Be-7 <8.44E-02 O.OOE+OO 8.44E-02 K-40 3.92E-01 1.SOE-01 1.54E-01 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 37 of 91 Duke Energy Annual Report -Appendix E En=:> 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radio.logical Environmental Monitoring Analysis Repoi:t- 2016.(Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 Sample Point 1184 [INDICATOR - NNE @ 2.58 miles]

Sample ID:* 401038 Sample Dates: 2/1/2016 - 2/8/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.87E-03 O.OOE+OO 9.87E-03 Cs-134 <5.84E-03 O.OOE+OO 5.84E-03 Cs-137 <5.61 E-03 O.OOE+OO 5.61E-03 Be-7 <5.53E-02 O.OOE+OO 5.53E-02 K-40 2.79E-01 1.10E-01 2.BOE-02 Sample ID: 401392 Sample Dates: 2/8/2016 -2/15/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.46E-03 O.OOE+OO 7.46E-03 Cs-134 <8.03E-03 O.OOE+OO 8.03E-03 Cs-137 <9.48E-03 O.OOE+OO 9.48E-03 Be-7 <6.25E-02 O.OOE+OO 6.25E-02 K-40 5.42E-01 1.57E-01 2.77E-02 Sample ID: 401837 Sample Dates: 2/15/2016 - 2/22/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.11E-03 O.OOE+OO 9.11E-03 Cs-134 <7.21E-03 O.OOE+OO 7.21E-03 Cs-137 <1.04E-02 O.OOE+OO 1.04E-02 Be-7 <4.67E-02 O.OOE+OO 4.67E-02 K-40 2.96E-01 1.13E-01 2.77E-02 Sample ID: 402358 Sample Dates: 2/22/2016 - 2/29/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.40E-03 O.OOE+OO 7.40E-03 Cs-134 <B.74E-03 O.OOE+OO B.74E-03 Cs-137 <B.43E-03 O.OOE+OO 8.43E-03 Be-7 <7.12E-02 O.OOE+OO 7.12E-02 K-40 3.36E-01 1.37E-01 1.31 E-01 Sample ID: 403082 Sample Dates: 2/29/2016 - 3/7/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.61 E-03 O.OOE+OO 9.61E-03 Cs-134 <7.68E-03 'O.OOE+OO 7.68E-03 Cs-137 <7.87E-03 O.OOE+OO 7.87E-03 Be-7 <4.73E-02 O.OOE+OO 4.73E-02 K-40 2.78E-01 1.31E-01 1.46E-01 Sample ID: 404573 Sample Dates: 3/7/2016 - 3/14/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.64E-03 O.OOE+OO 11.64E-03 Cs-134 <7.58E-03 O.OOE+OO 7.58E-03 Cs-137 <7.77E-03 O.OOE+OO 7.77E-03 Be-7 <4.68E-02 O.OOE+OO 4.68E-02 K-40 2.82E-01 1.23E-01 1.17E-01 Sample ID: 405440 Sample Dates: 3/14/2016 - 3/2112016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.20E-03 O.OOE+OO 9.20E-03 Cs-134 <6.41 E-03 O.OOE+OO 6.41E-03 Cs-137 <9.11E-03 O.OOE+OO 9.11 E-03 Be-7 <5.60E-02 O.OOE+OO 5.60E-02 K-40 4.32E-01 1.46E-01 1.00E-01 Sample ID: 406071 Sample Dates: 3/21/2016 - 3/28/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <B.29E-03 O.OOE+OO 8.29E-03 Cs-134 <8.64E-03 O.OOE+OO 8.64E-03 Cs-137 <8.12E-03 O.OOE+OO 8.12E-03 Be-7 <5.32E-02 O.OOE+OO 5.32E-02 K-40 3.99E-01 1.39E-01 3.09E-02 Sample ID: 406430 Sample Dates: 3/28/2016 - 4/4/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.09E-02 O.OOE+OO 1.09E-02 Cs-134 <8.40E-03 O.OOE+OO 8.40E-03 Cs-137 <5.81E-03 O.OOE+OO 5.81 E-03 Be-7 <6.86E-02 O.OOE+OO 6.86E-02 K-40 3.78E-01 1.30E-01 2.84E-02 Sample ID: 407604 Sample Dates: 4/4/2016 -4/11/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.70E-03 O.OOE+OO 8.70E-03 Cs-134 <8.46E-03 O.OOE+OO 8.46E-03 Cs-137 <7.91E-03 O.OOE+OO 7.91 E-03 Be-7 <5.58E-02 O.OOE+OO 5.58E-02 K-40 4.56E-01 1.76E-01 1.95E-01 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 38 of 91 Duke Energy Annual Report -Appendix E En:=> 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis .Report- 2016 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCilm3 Sample Point 084 [INDICATOR - NNE@ 2.58 miles]

Sample ID: 408165 Sample Dates: 4/11/2016 -4/18/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.03E-02 O.OOE+OO 1.03E-02 Cs-134 <7.66E-03 O.OOE+OO 7.66E-03 Cs-137 <9.51E-03 0.00E+OO 9.51 E-03 Be-7 <7.66E-02 O.OOE+OO 7.66E-02 K-40 3.28E-01 1.50E-01 1.76E-01 Sample ID: 409487 Sample Dates: 4/18/2016 -4/25/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.01E-02 O.OOE+OO 1.01E-02 Cs-134 <6.49E-03 O.OOE+OO 6.49E-03 Cs-137 <9.45E-03 O.OOE+OO 9.45E-03 Be-7 <5.74E-02 O.OOE+OO 5.74E-02 K-40 3.73E-01 1.44E-01 1.21E-01 Sample ID: 409819 Sample Dates: 4/25/2016 - 5/2/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <6.83E-03 O.OOE+OO 6.83E-03 Cs-134 <5.80E-03 O.OOE+OO 5.BOE-03 Cs-137 <8.46E-03 O.OOE+OO 8.46E-03 Be-7 <5.85E-02 O.OOE+OO 5.85E-02 K-40 2.57E-01 1.05E-01 2.78E-02 Sample ID: 410993 Sample Dates: 5/2/2016 - 5/9/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.11E-03 O.OOE+OO 9.11E-03 Cs-134 <7.06E-03 O.OOE+OO 7.06E-03 Cs-137 <7.4BE-03 O.OOE+OO 7.48E-03 Be-7 <5.23E-02 O.OOE+OO 5.23E-02 K-40 3.65E-01 1.27E-01 2.83E-02 Sample ID: 411465 Sample Dates: 5/9/2016 - 5/16/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.75E-03 O.OOE+OO 8.75E-03 Cs-134 <8.59E-03 O.OOE+OO 8.59E-03 Cs-137 <6.59E-03 O.OOE+OO 6.59E-03 Be-7 <6.03E-02 O.OOE+OO 6.03E-02 K-40 4.32E-01 1.40E-01 2.85E-02 Sample ID: 411798 Sample Dates: 5/16/2016 - 5/23/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.93E-03 O.OOE+OO 7.93E-03 Cs-134 <8.54E-03 O.OOE+OO 8.54E-03 Cs-137 <6.20E-03 O.OOE+OO 6.20E-03 Be-7 <5.71E-02 O.OOE+OO 5.71E-02 K-40 4.73E-01 1.51E-01 3.05E-02 Sample ID: 412258 Sample Dates: 5/23/2016 - 5/31/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <6.42E-03 O.OOE+OO 6.42E-03 Cs-134 <8.09E-03 O.OOE+OO 8.09E-03 Cs-137 <6.66E-03 O.OOE+OO 6.66E-03 Be-7 <5.68E-02 O.OOE+OO 5.68E-02 K-40 4.00E-01 1.26E-01 2.52E-02 Sample ID: 412776 Sample Dates: 5/31/2016 - 6/6/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.15E-02 O.OOE+OO 1.15E-02 Cs-134 <8.76E-03 O.OOE+OO 8.76E-03 Cs-137 <1.01E-02 O.OOE+OO 1.01 E-02 Be-7 <7.43E-02 O.OOE+OO 7.43E-02 K-40 4.55E-01 1.59E-01 3.52E-02 Sample ID: 413391 Sample Dates: 6/6/2016 - 6/13/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.13E-02 O.OOE+OO 1.13E-02 Cs-134 <7.02E-03 O.OOE+OO 7.02E-03 Cs-137 <8.72E-03 O.OOE+OO 8.72E-03 Be-7 <6.45E-02 O.OOE+OO 6.45E-02 K-40 4.00E-01 1.44E-01 9.58E-02 Sample ID: 413927 Sample Dates: 6/13/2016 - 6/20/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.71E-03 O.OOE+OO 8.71 E-03 Cs-134 <7.63E-03 O.OOE+OO 7.63E-03 Cs-137 <6.23E-03 O.OOE+OO 6.23E-03 Be-7 <6.57E-02 O.OOE+OO 6.57E-02 K-40 4.DOE-01 1.67E-01 1.85E-01 Report Generated @ 41412017 13:40:53 EnRad Laboratories Appendix E - Page 39 of 91 Duke Energy Annual Report -Appendix E En.S) 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report- 2016 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 Sample Point 084 [INDICATOR - NNE@ 2.58 miles]

Sample ID: 415065 . Sample Dates: 6/20/2016 - 6/27/2016 Nuclide 'Activity 2 Sigma Error MDA 1-131 <7.41E-03 O.OOE+OO 7.41E-03 Cs-134 <6.32E-03 O.OOE+OO 6.32E-03 Cs-137 <6.44E-03 O.OOE+OO 6.44E-03 Be-7 <5.84E-02 O.OOE+OO 5.84E-02 K-40 3.55E-01 1.40E-01 1.32E-01 Sample ID: 415466 Sample Dates: 6/27/2016 - 7/5/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.01E-02 O.OOE+OO 1.01 E-02 Cs-134 <4.35E-03 O.OOE+OO 4.35E-03 Cs-137 <7.63E-03 O.OOE+OO 7.63E-03 Be-7 <5.31E-02 O.OOE+OO 5.31 E-02 K-40 4.50E-01 1.39E-01 2.65E-02 Sample ID: 416443 Sample Dates: 7/5/2016 -7/11/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.43E-03 O.OOE+OO 8.43E-03 Cs-134 <8.94E-03 O.OOE+OO 8.94E-03 Cs-137 <1.05E-02 O.OOE+OO 1.05E-02 Be-7 <5.43E-02 O.OOE+OO 5.43E-02 K-40 4.19E-01 1.79E-01 2.01E-01 Sample ID: 417056 Sample Dates: 7/11/20_16 - 7/18/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.21E-03 O.OOE+OO 9.21 E-03 Cs-134 <7.94E-03 O.OOE+OO 7.94E-03 Cs-137 <7.07E-03 O.OOE+OO 7.07E-03 Be-7 <6.36E-02 O.OOE+OO 6.36E-02 K-40 <3.12E-01 O.OOE+OO 3.12E-01 Sample ID: 417447 Sample Dates: 7/18/2016 - 7/25/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.37E-03 O.OOE+OO 9.37E-03 Cs-134 <5.79E-03' O.OOE+OO 5.79E-03 Cs-137 <8.98E-03 O.OOE+OO 8.98E-03 Be-7 <5.83E-02 O.OOE+OO 5.83E-02 K-40 3.47E-01 1.34E-01 1.14E-01 Sample ID: 417840 Sample Dates: 7/25/2016 -8/1/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.46E-03 O.OOE+OO 8.46E-03 Cs-134 <8.00E-03 O.OOE+OO 8.00E-03 Cs-137 <7.81E-03 O.OOE+OO 7.81E-03 Be-7 <4.65E-02 O.OOE+OO 4.65E-02 K-40 3.47E-01 1.23E-01 2.77E-02 Sample ID: 418316 Sample Dates: 8/1/2016 - 8/8/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.42E-03 O.OOE+OO 8.42E-03 Cs-134 <8.00E-03 O.OOE+OO 8.00E-03 Cs-137 <8.40E-03 O.OOE+OO 8.40E-03 Be-7 <2.85E-02 O.OOE+OO 2.85E-02 K-40 5.65E-01 1.66E-01 9.72E-02 Sample ID: 419034 Sample Dates: 8/8/2016 - 8/15/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.24E-03 O.OOE+OO 7.24E-03 Cs-134 <6.68E-03 O.OOE+OO 6.68E-03 Cs-137 <6.::i3E-03 O.OOE+OO 6.33E-03 Be-7 <5.00E-02 O.OOE+OO 5.00E-02 K-40 3.32E-01 1.20E-01 2.73E-02 Sample ID: 419532 Sample Dates: 8/15/2016 - 8/22/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.49E-03 O.OOE+OO 9.49E-03 Cs-134 <8.82E-03 O.OOE+OO 8.82E-03 Cs-137 <7.92E-03 O.OOE+OO 7.92E-03 Be-7 <4.22E-02 O.OOE+OO 4.22E-02 K-40 2.83E-01 1.34E-01 1.50E-01 Sample ID: 420061 Sample Dates: 8/22/2016 - 8/29/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.09E-02 O.OOE+OO 1.09E-02 Cs-134 <7.58E-03 O.OOE+OO 7.58E-03 Cs-137 <6.38E-03 O.OOE+OO 6.38E-03 Be-7 <4.15E-02 O.OOE+OO 4.15E-02 K-40 3.64E-01 1.46E-01 1.49E-01 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 40 of 91 Duke Energy Annual Report -Appendix E En~ 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 Sample Point 084 [INDICATOR - NNE@ 2.58 miles]

Sample ID: 420607 Sample Dates: B/29/2016 - 9/6/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <5.62E-03 O.OOE+OO 5.62E-03 Cs-134 <5.51E-03 O.OOE+OO 5.51E-03 Cs-137 <7.82E-03 O.OOE+OO 7.82E-03 Be-7 <4.48E-02 O.OOE+OO 4.48E-02 K-40 4.02E-01 1.40E-01 1.26E-01 Sample ID: 421473 Sample Dates: 9/6/2016 - 9/12/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.61E-03 O.OOE+OO 9.61 E-03 Cs-134 <6.64E-03 O.OOE+OO 6.64E-03 Cs-137 <7.39E-03 O.OOE+OO 7.39E-03 Be-7 <5.39E-02 O.OOE+OO 5.39E-02 K-40 3.94E-01 1.59E-01 1.55E-01 Sample ID: 422609 Sample Dates: 9/12/2016 - 9/19/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.20E-02 O.OOE+OO 1.20E-02 Cs-134 <7.06E-03 O.OOE+OO 7.06E-03 Cs-137 <1.17E-02 O.OOE+OO 1.17E-02 Be-7 <5.71E-02 O.OOE+OO 5.71 E-02 K-40 5.41E-D1 1.63E-01 3.DSE-02 Sample ID: 423352 Sample Dates: 9/19/2016 - 9/26/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.34E-D3 O.OOE+OO 8.34E-03 Cs-134 <6.26E-D3 O.OOE+OO 6.26E-03 Cs-137 <6.38E-D3 O.DOE+OO 6.38E-03 Be-7 <5.77E-D2 O.ODE+OO 5.77E-D2 K-40 2.94E-D1 1.13E-01 2.75E-D2 Sample ID: 424492 Sample Dates: 9/26/2016 - 10/3/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.25E-03 O.OOE+OO 9.25E-03 Cs-134 <8.25E-03 D.DOE+oo 8.25E-03 Cs-137 <8.06E-03 O.OOE+OO 8.06E-03 Be-7 <6.65E-02 O.OOE+OO 6.65E-02 K-40 3.61E-01 1.37E-01 1.11E-01 Sample ID: 425488 Sample Dates: 10/3/2016 - 10/10/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.69E-03 D.DOE+DO 7.69E-03 Cs-134 <7.39E-03 D.OOE+OO 7.39E-03 Cs-137 <6.94E-03 O.OOE+OO 6.94E-D3 Be-7 <4.97E-02 D.OOE+OO 4.97E-02 K-40 3.68E-01 1.33E-01 1.D2E-01 Sample ID: 426030 Sample Dates: 10/10/2016 -10/17/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <B.12E-03 O.OOE+OO B.12E-03 Cs-134 <5.29E-03 O.DDE+DO 5.29E-03 Cs-137 <7.99E-03 D.DOE+OO 7.99E-03 Be-7 <5:59E-02 0.00E+OO 5.59E-02 K-40 4.49E-01 1.43E-01 2.83E-02 Sample ID: 426399 Sample Dates: 10/17/2016 -10/24/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.94E-03 O.ODE+OO 9.94E-03 Cs-134 <7.67E-03 O.OOE+OO 7.67E-03 Cs-137 <8.11E-D3 O.OOE+OO B.11E-03 Be-7 <4.0SE-02 O.OOE+OO 4.0SE-02 K-40 3.53E-01 1.45E-01 1.37E-01 Sample ID: 427083 Sample Dates: 10/24/2016 -10/31/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.99E-03 D.OOE+OO 9.99E-03 Cs-134 <6.81E-03 D.OOE+OO 6.81 E-03 Cs-137 <6.46E-03 D.OOE+OO 6.46E-03 Be-7 <6.50E-02 O.OOE+OO 6.SOE-02 K-40 3.38E-01 1.33E-01 1.1 SE-01 Sample ID: 427751 Sample Dates: 10/31/2016 -11/7/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.32E-03 O.OOE+OO 9.32E-03 Cs-134 <7.57E-03 O.OOE+OO 7.57E-03 Cs-137 <6.18E-03 O.OOE+OO 6.18E-03 Be-7 <4.67E-02 O.OOE+OO 4.67E-02 K-40 2.92E-01 1.17E-01 3.04E-02 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 41 of 91 Duke Energy Annual Report - Appendix E En:> 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E).

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 Sample Point 084 [INDICATOR*:. NNE@ 2.58 miles]

Sample ID: 428251 Sample Dates: 1V7/2016 -11/14/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.07E-02 O.OOE+OO 1.07E-02 Cs-134 <8.18E-03 O.OOE+OO 8.18E-03 Cs-137 <1.13E-02 0.00E+OO 1.13E-02 Be-7 <6.61E-02 O.OOE+OO 6.61 E-02 K-40 4.66E-01 1.88E-01 2.15E-01 Sample ID: 428927 Sample Dates: 11/14/2016 -11/21/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <2.22E-02 O.OOE+OO 2.22E-02 Cs-134 <1.21E-02 O.OOE+OO 1.21E-02 Cs-137 <1.24E-02 O.OOE+OO 1.24E-02 Be-7 <7.95E-02 O.OOE+OO 7.95E-02 K-40 3.BBE-01 1.85E-01 1.91 E-01 Sample ID: 429429 Sample Dates: 11/21/2016 -11128/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.33E-02 O.OOE+OO 1.33E-02 Cs-134 <9.47E-03 O.OOE+OO 9.47E-03 Cs-137 <9.66E-03 O.OOE+OO 9.66E-o3 Be-7 <6.95E-02 O.OOE+OO 6.95E-02 K-40 7.53E-01 2.37E-01 1.71 E-01 Sample ID: 429989 Sample Dates: 11/28/2016 - 12/5/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.76E-03 O.OOE+OO 7.76E-03 Cs-134 <8.21E-03 O.OOE+OO 8.21E-03 Cs-137 <7.02E-03 O.OOE+OO 7.02E-03 Be-7 <5.03E-02 O.OOE+OO 5.03E-02 K-40 4.61E-01 1.42E-01 2.71E-02 Sample ID: 430615 Sample Dates: 12/5/2016 - 12/12/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.1 BE-03 O.OOE+OO 8.18E-03

' Cs-134 <5.61 E-03 O.OOE+OO 5!61E-03 Cs-137 <8.18E-03 O.OOE+OO 8.1BE-03 Be-7 <5.65E-02 O.OOE+OO 5.65E-02 K-40 4.47E-01 1.69E-01 1.85E-01 Sample ID: 431097 Sample Dates: 12/12/2016 -12/19/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.04E-03 O.OOE+OO 9.04E-03 Cs-134 <8.48E-03 O.OOE+OO 8.48E-03 Cs-137 <9.88E-03 O.OOE+OO 9.88E-03 Be-7 <3.36E-02 O.OOE+OO 3.36E-02 K-40 4.25E-01 1.46E-01 3.20E-02 Sample ID: 431497 Sam pie Dates: 12/19/2016 - 12/2712016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.89E-03 O.OOE+OO 7.89E-03 Cs-134 <6.60E-03 O.OOE+OO 6.60E-03 Cs-137 <7.71E-03 O.OOE+OO 7.71E-03 Be-7 <5.60E-02 O.OOE+OO 5.60E-02 K-40 3.87E-01 1.32E-01 9.98E-02 Sample Point 085 [INDICATOR - NNW@ 0.88 miles]

Sample ID: 398733 Sample Dates: 12/28/2015 - 1/5/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.54E-02 O.OOE+OO 1.54E-02 Cs-134 <1.0BE-02 O.OOE+OO 1.0BE-02 Cs-137 <1.33E-02 O.OOE+OO 1.33E-02 Be-7 <1.10E-01 O.OOE+OO 1.10E-01 K-40 5.17E-01 1.99E-01 1.71 E-01 Sample ID: 398991 Sample Dates: 1/5/2016 -1/11/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.18E-03 O.OOE+OO 9.18E-03 Cs-134 <9.44E-03 O.OOE+OO 9.44E-03 Cs-137 <1.04E-02 O.OOE+OO 1.04E-02 Be-7 <7.10E-02 O.OOE+OO 7.10E-02 K-40 <9.22E-02 O.OOE+OO 9.22E-02 Sample ID: 399298 Sample Dates: 1/11)2016 -1/18/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.35E-02 O.OOE+OO 1.35E-02 Cs-134 <1.54E-02 O.OOE+OO 1.54E-02 Cs-137 <8.03E-03 O.OOE+OO 8.03E-03 Be-7 <9.34E-02 O.OOE+OO 9.34E-02 K-40 5.63E-01 2.0SE-01 4.77E:o2 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 42 of 91 Duke Energy Annual Report -Appendix E En==> 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCilm3

sample Point 085 [ INDICATOR - NNW@ 0:88 miles]

Sample ID: 400039 Sample Dates: 1/18/2016 -1/2512016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.05E-03 O.OOE+OO 9.05E-03 Cs-134 <8.30E-03 O.OOE+OO 8.30E-03 Cs-137 <9.68E-03 O.OOE+OO 9.68E-03 Be-7 <5.33E-02 O.OOE+OO 5.33E-02 K-40 2.47E-01 1.47E-01 1.94E-01 Sample ID: 400401 Sample Dates: 1/25/2016 - 2/112016 Nuclide Activity 2 Sigma Error MDA 1-131 <2.05E-02 O.OOE+OO 2.05E-02 Cs-134 <1.22E-02 O.OOE+OO 1.22E-02 Cs-137 <1.51E-02 O.OOE+OO 1.51E-02 Be-7 <9.20E-02 O.OOE+OO 9.20E-02 K-40 7.74E-01 2.73E-01 2.61E-01 Sample ID: 401039 Sample Dates: 2/112016 -2/8/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.61E-03 O.OOE+OO 8.61E-03 Cs-134 <7.90E-03 O.OOE+OO 7.90E-03 Cs-137 <8.10E-03 O.OOE+OO 8.10E-03 Be-7 <5.24E-02 O.OOE+OO 5.24E-02 K-40 4.57E-01 1.45E-01 2.88E-02 Sample ID: 401393 Sample Dates: 2/812016

2115/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.25E-03 O.OOE+OO 8.25E-03 Cs-134 <8.59E-03 O.OOE+OO 8.59E-03 Cs-137 <8.02E-03 O.OOE+OO 8.02E-03 Be-7 <5.27E-02 O.OOE+OO 5.27E-02 K-40 4.44E-01 1.75E-01 1.96E-01 Sample ID: 401838 Sample Dates: 2/15/2016 - 2/2212016 Nuclide Activity 2 Sigma Error MDA 1-131 <6.97E-03 O.OOE+OO 6.97E-03 Cs-134 <5.38E-03 O.OOE+OO 5.38E-03 Cs-137 <8.15E-03 O.OOE+OO 8.15E-03 Be-7 <5.65E-02 O.OOE+OO 5.65E-02 K-40 4.31 E-01 1.49E-01 1.13E-01 Sample ID: 402359 Sample Dates: 2/22/2016 - 2/29/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.75E-03 O.OOE+OO 9.75E-03 Cs-134 <8.24E-03 O.OOE+OO 8.24E-03 Cs-137 <6.32E-03 O.OOE+OO 6.32E-03 Be-7 <7.76E-02 O.OOE+OO 7.76E-02 K-40 2.88E-01 1.44E-01 1.70E-01 Sample ID: 403083 Sample Dates: 2/29/2016 - 31712016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.03E-03 O.OOE+OO 8.03E-03 Cs-134 <7.83E-03 O.OOE+OO 7.83E-03 Cs-137 <7.36E-03 O.OOE+OO 7.36E-03 Be-7 <6.02E-02 O.OOE+OO 6.02E-02 K-40 3.83E-01 1.48E-01 1.41 E-01 Sample ID: 404574 Sample Dates: 3/7/2016 - 3/14/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.20E-03 O.OOE+OO 9.20E-03 Cs-134 <6.90E-03 O.OOE+OO 6.90E-03 Cs-137 <9.63E-03 O.OOE+OO 9.63E-03 Be-7 <4.28E-02 O.OOE+OO 4.28E-02 K-40 3.25E-01 1.40E-01 1.47E-01 Sample ID: 405441 Sample Dates: 3/1412016 - 3/21/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.93E-03 O.OOE+OO 7.93E-03 Cs-134 <7.29E-03 O.OOE+OO 7.29E-03 Cs-137 <7.24E-03 O.OOE+OO 7.24E-03 Be-7 <6.56E-02 O.OOE+OO 6.56E-02 K-40 4.77E-01 1.47E-01 2.81 E-02 Sample ID: 406072 Sample Dates: 3/21/2016 - 3/28/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.81E-03 O.OOE+OO 9.81 E-03 Cs-134 <7.BOE-03 O.OOE+OO 7.60E-03 Cs-137 <7.14E-03 O.OOE+OO 7.14E-03 Be-7 <3.64E-02 O.OOE+OO 3.64E-02 K-40 3.55E-01 1.35E-01 1.14E-01 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 43 of 91 Duke Energy Annual Report -Appendix E *E_n_y 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 Sample Point 085 [INDICATOR - NNW@ 0.88 miles]

Sample lb: 406431 Sample Dates: 3128/2016 - 4/4/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <USE-02 O.OOE+OO 1.18E-02 Cs-134 <7.12E-03 O.OOE+OO 7.12E-03 Cs-137 <9.50E-03 O.OOE+OO 9.50E-03 Be-7 <7.08E-02 O.OOE+OO 7.08E-02 K-40 6.60E-01 1.90E-01 1.20E-01 Sample ID: 407605 Sample Dates: 4/4/2016 -411112016 Nuclide Activity 2 Sigma Error MDA 1-131 <6.80E-03 O.OOE+OO 6.80E-03 Cs-134 <6.56E-03 O.OOE+OO 6.56E-03 Cs-137 <1.03E-02 o:noE+oo 1.03E-02 Be-7 <3.78E-02 O.OOE+OO 3.78E-02 K-40 4.14E-01 1.67E-01 1.84E-01 Sample ID: 408166 Sample Dates: 4/1112016 -4/1812016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.24E-03 O.OOE+OO 7.24E-03 Cs-134 <B.48E-03 O.OOE+OO 8.48E-03 Cs-137 <1.11E-02 O.OOE+OO 1.11 E-02 Be-7 <5.21E-02 O.OOE+OO 5.21 E-02 K-40 4.45E-01 1.76E-01 1.91 E-01 Sample ID: 409488 Sample Dates: 4/1812016 - 4/25/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.23E-03 O.OOE+OO 7.23E-03 Cs-134 <7.57E-03 O.OOE+OO 7.57E-03 Cs-137 <8.36E-03 O.OOE+OO 8.36E-03 Be-7 <4.18E-02 O.OOE+OO 4.18E-02 K-40 3.76E-01 1.28E-01 2.76E-02 Sample ID: 409820 Sample Dates: 4125/2016 - 5/2/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.65E-03 O.OOE+OO 8.65E-03 Cs-134 <5.32E-03 O.OOE+OO 5.32E-03 Cs-137 <8.04E-03 O.OOE+OO 8.04E-03 Be-7 <4.77E-02 O.OOE+OO 4.77E-02 K-40 3.27E-01 1.21E-01 2.86E-02 Sample ID: 410994 Sample Dates: 51212016 -519/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.00E-02 O.OOE+OO 1.00E-02 Cs-134 <6.55E-03 O.OOE+OO 6.55E-03 Cs-137 <8.13E-03 O.OOE+OO 8.13E-03 Be-7 <6.57E-02 O.OOE+OO 6.57E-02 K-40 4.45E-01 1.47E-01 3.09E-02 Sample ID: 41t466 Sample Dates: 51912016 - 5/1612016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.70E-03 O.OOE+OO 8.70E-03 Cs-134 <6.46E-03 O.OOE+OO 6.46E-03 Cs-137 <1.00E-02 O.OOE+OO 1.00E-02 Be-7 <5.70E-02 O.OOE+OO 5.70E-02 K-40 4.16E-01 1.42E-01 3.05E-02 Sample ID: 411799 Sample Dates: 5116/2016 -5/2312016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.87E-03 O.OOE+OO 9.87E-03 Cs-134 <6.44E-03 O.OOE+OO 6.44E-03 Cs-137 <7.99E-03 O.OOE+OO 7.99E-03 Be-7 <4.67E-02 O.OOE+OO 4.67E-02 K-40 4.49E-01 1.47E-01 3.04E-02 Sample ID: 412259 Sample Dates: 5/23/2016 - 5/3112016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.07E-02 O.OOE+OO 1.07E-02 Cs-134 <8.48E-03 0.00E+OO 8.48E-03 Cs-137 <7.26E-03 O.OOE+OO 7.26E-03 Be-7 <1.06E-02 O.OOE+OO 1.06E-02 K-40 3.03E-01 1.45E-01 1.76E-01 Sample ID: 412777 Sample Dates: 513112016 - 616/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.02E-03 O.OOE+OO 9.02E-03 Cs-134 <7.62E-03 O.OOE+OO 7.62E-03 Cs-137 <6.72E-03 O.OOE+OO 6.72E-03 Be-7 <4.96E-02 O.OOE+OO 4.96E-02 K-40 4.50E-01 1.63E-01 1.26E-01 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 44 of 91 Duke Energy Annual Report - Appendix E En:=> 13339 Hagers Ferry Road Huntersville, North Carolina 28078

.OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 Sample Point 085 [ INDICATOR - NNW@ 0.88 miles]

Sample ID: 413392' Sample Dates: 6/6/2016 -6/13/2016 *Nuclide Activity 2 Sigma Error MDA 1-131 <6.84E-03 O.OOE+OO 6.84E-03 Cs-134 <7.25E-03 O.OOE+OO 7.25E-03 Cs-137 <7.21 E-03 O.OOE+OO 7.21 E-03 Be-7 <5.48E-02 O.OOE+OO 5.48E-02 K-40 4.63E-01 1.44E-01 2.79E-02 Sample ID: 413928 Sample Dates: 6/13/2016 - 6/20/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <5.60E-03 0.00E+OO 5.60E-03 Cs-134 <6.51E-03 O.OOE+OO 6.51 E-03 Cs-137 <1.03E-02 O.OOE+OO 1.03E-02 Be-7 <4.80E-02 O.OOE+OO 4.80E-02 K-40 2.76E-01 1.45E-01 1.84E-01 Sample ID: 415066 Sample Dates: 6/20/2016 - 6/27/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <6.78E-03 O.OOE+OO 6.78E-03 Cs-134 <8.07E-03 O.OOE+OO 8.07E-03 Cs-137 <6.48E-03 O.OOE+OO 6.48E-03 Be-7 <6.78E-02 O.OOE+OO 6.78E-02 K-40 4.34E-01 1.40E-01 2.BOE-02 Sample ID: 415467 Sample Dates: 6/27/2016 - 7/5/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.18E-03 O.OOE+OO 8.18E-03 Cs-134 <6.18E-03 O.OOE+OO 6.18E-03 Cs-137 <5.06E-03 O.OOE+OO 5.06E-03 Be-7 <4.21E-02 O.OOE+OO 4.21E-02 K-40 3.00E-01 1.26E-01 1.33E-01 Sample ID: 416444 Sample Dates: 7/5/2016 -7/11/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.04E-02 O.OOE+OO 1.04E-02 Cs-134 <6.22E-03 O.OOE+OO' 6.22E-03 Cs-137 <1.01E-02 O.OOE+OO 1.01 E-02 Be-7 <4.98E-02 O.OOE+OO 4.98E-02 K-40 5.1BE-01 1.66E-01 3.34E-02 Sample ID: 417057 Sample Dates: 7/11/2016 - 7/18/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.03E-03 O.OOE+OO 9.03E-03 Cs-134 <7.01E-03 O.OOE+OO 7.01 E-03 Cs-137 <8.72E-03 O.OOE+OO 8.72E-03 Be-7 <4.26E-02 O.OOE+OO 4.26E-02 K-40 3.42E-01 1.22E-01 2.81E-02 Sample ID: 417448 Sample Dates: 7/18/2016 - 7/25/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <6.14E-03 O.OOE+OO 6.14E-03 Cs-134 <4.79E-03 O.OOE+OO 4.79E-03 Cs-137 <7.35E-03 O.OOE+OO 7.35E-03 Be-7 <4.76E-02 O.OOE+OO 4.76E-02 K-40 4.84E-01 1.49E-01 2.85E-02 Sample ID: 417841 Sample Dates: 7/25/2016 - 8/1/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.94E-03 O.OOE+OO 9.94E-03 Cs-134 <8.17E-03 O.OOE+OO 8.17E-03 Cs-137 <6.56E-03 O.OOE+OO 6.56E-03 Be-7 <4.25E-02 O.OOE+OO 4.25E-02 K-40 5.15E-01 1.62E-01 1.09E-01 Sample ID: 418317 Sample Dates: 8/1/2016 - 8/8/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.49E-03 O.OOE+OO 9.49E-03 Cs-134 <8.19E-03 O.OOE+OO 8.19E-03 Cs-137 <8.61E-03 O.OOE+OO 8.61E-03 Be-7 <5.18E-02 O.OOE+OO 5.18E-02 K-40 5.04E-01 1.52E-01 2.85E-02 Sample ID: 419035 Sample Dates: 8/8/2016 - 8/15/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.41E-03 O.OOE+OO 8.41E-03 Cs-134 <6.35E-03 O.OOE+OO 6.35E-03 Cs-137 <7.89E-03 O.OOE+OO 7.89E-03 Be-7 <3.62E-02 O.OOE+OO 3.62E-02 K-40 3.73E-01 1.29E-01 2.80E-02 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 45 of 91 Duke Energy Annual Report - Appendix E En=-:> 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report.- 2016 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 Sample Point 085 [INDICATOR - NNW@ 0.88 miles]

Sample ID: 419533 Sample Dates: 8/15/2016 - 8/2212016 Nuclide *Activity 2 Sigma Error MDA 1-131 <1.00E-02 O.OOE+OO 1.00E-02 Cs-134 <8.28E-03 O.OOE+OO 8.28E-03 Cs-137 <8.0SE-03 O.OOE+OO 8.0SE-03 Be-7 <5.63E-02 O.OOE+OO 5.63E-02 K-40 2.83E-01 1.29E-01 1.34E-01 Sample ID: 420062 Sample Dates: 8/22/2016 - 8/29/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.47E-03 O.OOE+OO 7.47E-03 Cs-134 <8.14E-03 O.OOE+OO 8.14E-03 Cs-137 <7.29E-03 O.OOE+OO 7.29E-03 Be-7 <5.16E-02 O.OOE+OO 5.16E-02 K-40 3.17E-01 1.26E-01 1.01E-01 Sample ID: 420608 Sample Dates: 8/29/2016 - 9/6/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.92E-03 O.OOE+OO 7.92E-03 Cs-134 <5.16E-03 O.OOE+OO 5.16E-03 Cs-137 <8.45E-03 O.OOE+OO 8.45E-03 Be-7 <4.91 E-02 O.OOE+OO 4.91 E-02 K-40 3.21 E-01 1.38E-01 1.58E-01 Sample ID: 421474 Sample Dates: 9/6/2016 - 9/12/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.07E-03 O.OOE+OO 9.07E-03 Cs-134 <8.99E-03 O.OOE+OO 8.99E-03 Cs-137 <8.45E-03 O.OOE+OO 8.45E-03 Be-7 <4.26E-02 O.OOE+OO 4.26E-02 K-40 4.82E-01 1.71E-01 1.37E-01 Sample ID: 422610 Sample Dates: 9/1-2/2016 - 9/19/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.09E-02 O.OOE+OO 1.09E-02 Cs-134 <6.45E-b3 O.OOE+OO 6.45E-03 Cs-137 <8.74E-03 O.OOE+OO 8.74E-03 Be-7 <6.87E-02 O.OOE+OO 6.87E-02 K-40 3.59E-01 1.31E-01 3.04E-02 Sample ID: 423353 Sample Dates: 9/19/2016 - 9/26/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <5.97E-03 O.OOE+OO 5.97E-03 Cs-134 <7.63E-03 O.OOE+OO 7.63E-03 Cs-137 <5.55E-03 O.OOE+OO 5.55E-03 Be-7 <4.15E-02 O.OOE+OO 4.15E-02 K-40 4.94E-01 1.57E-01 1.0BE-01 Sample ID: 424493 Sample Dates: 9/26/2016 - 10/3/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.19E-03 O.OOE+OO 9.19E-03 Cs-134 <9.31E-03 O.OOE+OO 9.31 E-03 Cs-137 <7.38E-03 O.OOE+OO 7.38E-03 Be-7 <5.22E-02 O.OOE+OO 5.22E-02 K-40 3.68E-01 1.43E-01 1.30E-01 Sample ID: 425489 Sample Dates: 10/3/2016 -10/10/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.58E-03 O.OOE+OO 9.58E-03 Cs-134 <5.79E-03 O.OOE+OO 5.79E-03 Cs-137 <6.44E-03 O.OOE+OO 6.44E-03 Be-7 <4.71 E-02 O.OOE+OO 4.71E-02 K-40 4.22E-01 1.37E-01 2.79E-02 Sample ID: 426031 Sample Dates: 10/10/2016 -10/17/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.02E-03 O.OOE+OO 8.02E-03 Cs-134 <6.BBE-03 O.OOE+OO 6.BBE-03 Cs-137 <9.62E-03 O.OOE+OO 9.62E-03 Be-7 <6.22E-02 O.OOE+OO 6.22E-02 K-40 3.95E-01 1.43E-01 1.16E-01 Sample ID: 426400 Sample Dates: 10/17/2016 -10/24/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.02E-03 O.OOE+OO 8.02E-03 Cs-134 <8.50E-03 O.OOE+OO 8.50E-03 Cs-137 <4.46E-03 O.OOE+OO 4.46E-03 Be-7 <4.23E-02 O.OOE+OO 4.23E-02 K-40 3.65E-01 1.28E-01 2.82E-02 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 46 of 91 Duke Energy Annual Report - Appendix E EnY 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental N!onitoring Analysis Report - 2016 (Appendix E)

Media Type: AIR RADIOIODINE Concentration {Activity): pCi/m3 Sample Point 085 [INDICATOR - NNW@ 0.88 miles]

Sample ID: 427084 Sample Dates: 10/24/2016 - 10/31/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.18E-03 0.00E+OO 8.18E-03 Cs-134 <6.47E-03 O.OOE+OO 6.47E-03 Cs-137 <9.72E-03 O.OOE+OO 9.72E-03 Be-7 <4.28E-02 0.00E+OO 4.28E-02 K-40 4.32E-01 1.50E-01 1.15E-01 Sample ID: 427752 Sample Dates: 10/31/2016 -1117/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.85E-03 O.OOE+OO 8.85E-03 Cs-134 <8.57E-03 O.OOE+OO 8.57E-03 Cs-137 <B.B2E-03 O.OOE+OO 8.B2E-03 Be-7 <5.03E-02 O.OOE+OO 5.03E-02 K-40 3.49E-01 1.36E-01 1.22E-01 Sample ID: 428252 Sample Dates: 11/7/2016-11/14/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <B.23E-03 O.OOE+OO 8.23E-03 Cs-134 <8.34E-03 O.OOE+OO 8.34E-03 Cs-137 <9.03E-03 O.OOE+OO 9.03E-03 Be-7 <4.84E-02 O.OOE+OO 4.84E-02 K-40 3.83E-01 1.37E-01 3.15E-02 Sample ID: 428928 Sample Dates: 11/14/2016 -11/21/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.77E-02 O.OOE+OO 1.77E-02 Cs-134 <9.25E-03 O.OOE+OO 9.25E-03 Cs-137 <1.25E-02 0.00E+OO 1.25E-02 Be-7 <9.36E-02 O.OOE+OO 9.36E-02 K-40 6.22E-01 2.69E-01 3.21E-01 Sample ID: 429430 Sample Dates: 11/21/2016 -11/28/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.03E-03 O.OOE+OO 7.03E-03 Cs-134 <7.00E-03 O.OOE+OO 7.00E-03 Cs-137 <6.63E-03 O.OOE+OO 6.63E-03 Be-7 <4.BOE-02 O.OOE+OO 4.BOE-02 K-40 4.03E-01 1.36E-01 2.87E-02 Sample ID: 429990 Sample Dates: 11/28/2016 -12/5/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <8.47E-03 O.OOE+OO 8.47E-03 Cs-134 <3.55E-03 O.OOE+OO 3.55E-03 Cs-137 <5.56E-03 O.OOE+OO 5.56E-03 Be-7 <5.52E-02 O.OOE+OO 5.52E-02 K-40 3.34E-01 1.55E-01 1.BBE-01 Sample ID: 430616 Sample Dates: 12/5/2016 -12/12/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <7.BOE-03 O.OOE+OO 7.BOE-03 Cs-134 <5.14E-03 O.OOE+OO 5.14E-03 Cs-137 <7.78E-03 O.OOE+OO 7.78E-03 Be-7 <5.04E-02 O.OOE+OO 5.04E-02 K-40 <3.09E-01 O.OOE+OO 3.09E-01 Sample ID: 431098 Sample Dates: 12112/2016 -12/19/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.85E-03 O.OOE+OO 9.85E-03 Cs-134 <8.43E-03 O.OOE+OO 8.43E-03 Cs-137 <4.62E-03 O.OOE+OO 4.62E-03 Be-7 <4.92E-02 O.OOE+OO 4.92E-02 K-40 4.89E-01 1.66E-01 1.41E-01 Sample ID: 431498 Sample Dates: 12/19/2016 - 12/27/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <9.64E-03 O.OOE+OO 9.64E-03 Cs-134 <5.18E-03 O.OOE+OO 5.18E-03 Cs-137 <7.17E-03 O.OOE+OO 7.17E-03 Be-7 <4.66E-02 O.OOE+OO 4.66E-02 K-40 4.26E-01 1.43E-01 1.01E-01 Media Type: DRINKING WATER Concentration (Activity): pCi/I Sample Point 060 [INDICATOR - NE@ 3.23 miles]

Sample ID: 398479 Sample Dates: 12/7/2015 - 1 /5/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.27E+OO 7.63E-01 1.23E+OO Mn-54 <4.05E+OO O.OOE+OO 4.05E+OO Co-58 <3.55E+OO O.OOE+OO 3.55E+OO Fe-59 <B.84E+OO O.OOE+OO 8.84E+OO Report Generated@ 41412017 13:40:53 EnRad Laboratories Appendix E - Page 47 of 91 Duke Energy Annual Report -Appendix E

En~ 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: DRINKING WATER Concentration (Activity): pCi/I Sample Point 060 [INDICATOR - NE@ 3.23 miles]

Sample ID: 398479 Sample Dates: '12/7/2015 -1/5/2016 Nuclide Activity 2 Sigma Error MDA Co-60 <3.51E+OO O.OOE+OO 3.51E+OO Zn-65 <8.46E+OO O.OOE+OO 8.46E+OO Zr-95 <6.78E+OO O.OOE+OO 6.78E+OO Nb-95 <4.02E+OO 0.00E+OO 4.02E+OO 1-131 <1.15E+01 O.OOE+OO 1.15E+01 Cs-134 <3.23E+OO O.OOE+OO 3.23E+OO Cs-137 <3.72E+OO O.OOE+OO 3.72E+OO Bala-140 <6.96E+OO O.OOE+OO 6.96E+OO Be-7 <3.83E+01. O.OOE+OO 3.83E+01 K-40 <6.11E+01 O.OOE+OO 6.11E+01 Sample ID: 400161 Sample Dates: 1/5/2016 -2/1/2016 Nuclide Activity 2 Sigma Error MDA Beta <5.61 E-01 O.OOE+OO 1.24E+OO Mn-54 <2.88E+OO O.OOE+OO 2.BBE+OO Co-58 <3.00E+OO O.OOE+OO 3.00E+OO Fe-59 <6.64E+OO 0.00E+OO 6.64E+OO Co-60 <3.10E+OO O.OOE+OO 3.10E+OO Zn-65 <7.91 E+OO O.OOE+OO 7.91E+OO Zr-95 <5.32E+OO O.OOE+OO 5.32E+OO Nb-95 <4.48E+OO O.OOE+OO 4.48E+OO 1-131 <1.19E+01 O.OOE+OO 1.19E+01 Cs-134 <4.28E+OO O.OOE+OO 4.28E+OO Cs-137 <3.50E+OO O.OOE+OO 3.50E+OO Bala-140 <9.19E+OO O.OOE+OO 9.19E+OO Be-7 <3.01 E+01 O.OOE+OO 3.01E+01 K-40 1.83E+01 2.81E+01 4.72E+01 Sample ID: 401966 Sample Dates: 2/1 /2016 - 2/29/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.69E+OO 7.56E-01 1.17E+OO Mn-54 <4.15E+OO O.OOE+OO 4.15E+OO Co-58 <4.42E+OO O.OOE+OO 4.42E+OO Fe-59 <6.82E+OO O.OOE+OO 6.82E+OO Co-60 <3.84E+OO O.OOE+OO 3.84E+OO Zn-65 <8.84E+OO O.OOE+OO 8.84E+OO Zr-95 <9.46E+OO O.OOE+OO 9.46E+OO Nb-95 <3.21E+OO O.OOE+OO 3.21E+OO 1-131 <1.20E+01 O.OOE+OO 1.20E+01 Cs-134 <3.72E+OO O.OOE+OO 3.72E+OO Cs-137 <4.49E+OO O.OOE+OO 4.49E+OO Bala-140 <9.66E+OO O.OOE+OO 9.66E+OO Be-7 <3.11E+01 O.OOE+OO 3.11E+01 K-40 5.97E+01 3.64E+01 4.70E+01 Sample ID: 403612 Sample Dates: 12/7/2015 - 2/29/2016 Nuclide Activity 2 Sigma Error MDA H3DW <-6.1 E+01 O.OOE+OO 1.97E+02 Sample ID: 405638 Sample Dates: 2/29/2016 - 3/28/2016 Nuclide Activity 2 Sigma Error MDA Beta* 6.19E-01 6.92E-01 1.16E+OO Mn-54 <1.42E+OO O.OOE+OO 1.42E+OO Co-58 <1.75E+OO O.OOE+OO 1.75E+OO Fe-59 <3.16E+OO O.OOE+OO 3.16E+OO Co-60 <1.63E+OO O.OOE+OO 1.63E+OO Zn-65 <2.55E+OO O.OOE+OO 2.55E+OO Zr-95 <3.26E+OO O.OOE+OO 3.26E+OO Nb-95 <2.28E+OO O.OOE+OO 2.28E+OO 1-131 <9.67E+OO O.OOE+OO 9.67E+OO Cs-134 <1.56E+OO O.OOE+OO 1.56E+OO Cs-137 <1.69E+OO O.OOE+OO 1.69E+OO Bala-140 <5.66E+OO O.OOE+OO 5.66E+OO Be-7 <1.55E+01 O.OOE+OO 1.55E+01 K-40 4.75E+01 1.57E+01 1.95E+01 Sample ID: 408522 Sample Dates: 3/28/2016 - 4/25/2016 Nuclide Activity 2 Sigma Error MDA Beta <4.22E-01 O.OOE+OO 1.26E+OO Mn-54 <3.58E+OO O.OOE+OO 3.58E+OO Co-58 <3.70E+OO O.OOE+OO 3.70E+OO Fe-59 <8.11E+OO O.OOE+OO 8.11E+OO Co-60 <4.09E+OO O.OOE+OO 4.09E+OO Zn-65 <1.14E+01 O.OOE+OO 1.14E+01 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 48 of 91 Duke Energy Annual Report -Appendix E En:Y 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report- 2016 (Appendix E)

Media Type: DRINKING WATER Concentration (Activity): pCi/I Sample Point 060 [INDICATOR - NE @ 3.23 miles]

Sample ID: 408522. Sample Dates: 3/28/2016 -4/l!5/2016 Nuclide Activity 2 Sigma Error MDA Zr-95 <9.09E+OO O.OOE+OO 9.09E+OO Nb-95 <5.99E+OO O.OOE+OO 5.99E+OO 1-131 <9.87E+OO O.OOE+OO 9.87E+OO Cs-134 <4.90E+OO O.OOE+OO 4.90E+OO Cs-137 <3.22E+OO O.OOE+OO 3.22E+OO Bala-140 <7.10E+OO O.OOE+OO 7.10E+OO Be-7 <3.59E+01 O.OOE+OO 3.59E+01 K-40 <8.45E+01 O.OOE+OO 8.45E+01 Sample ID: 411595 Sample Dates: 4/2512016 - 512312016 Nuclide Activity 2 Sigma Error MDA Beta <-1.SE-02 O.OOE+OO 1.36E+OO Mn-54 <2.39E+OO O.OOE+OO 2.39E+OO Co-58 <3.49E+OO O.OOE+OO 3.49E+OO Fe-59 <8.84E+OO O.OOE+OO 8.84E+OO Co-60 <4.71E+OO O.OOE+OO 4.71E+OO Zn-65 <8.23E+OO O.OOE+OO 8.23E+OO Zr-95 <7.30E+OO O.OOE+OO 7.30E+OO Nb-95 <3.64E+OO O.OOE+OO 3.64E+OO 1-131 <1.18E+01 O.OOE+OO 1.18E+01 Cs-134 <4.47E+OO O.OOE+OO 4.47E+OO Cs-137 <4.94E+OO O.OOE+OO 4.94E+OO Bala-140 <6.09E+OO O.OOE+OO 6.09E+OO Be-7 <3.38E+01 O.OOE+OO 3.38E+01 K-40 <6.44E+01 O.OOE+OO 6.44E+01 Sample ID: 413186 Sample Dates: 2/29/2016 - 512312016 Nuclide Activity 2 Sigma Error MDA H3DW <1.74E+01 O.OOE+OO 1.96E+02 Sample ID: 413518 Sam,ple Dates: 5123/2016 - 6/20/2016 Nuclide A\=tivity 2 Sigma Error MDA Beta 6.34E-01 7.28E-01 1.22E+OO Mn-54 <3.74E+OO O.OOE+OO 3.74E+OO Co-58 <2.05E+OO O.OOE+OO 2.05E+OO Fe-59 <8.37E+OO O.OOE+OO 8.37E+OO Co-60 <2.48E+OO O.OOE+OO 2.48E+OO Zn-65 <7.37E+OO O.OOE+OO 7.37E+OO Zr-95 <6.82E+OO O.OOE+OO 6.82E+OO Nb-95 <3.50E+OO O.OOE+OO 3.50E+OO 1-131 <1.13E+01 O.OOE+OO 1.13E+01 Cs-134 <2.89E+OO O.OOE+OO 2.89E+OO Cs-137 <3.75E+OO 0.00E+OO 3.75E+OO Bala-140 <2.02E+OO O.OOE+OO 2.02E+OO Be-7 <3.49E+01 O.OOE+OO 3.49E+01 K-40 <5.48E+01 O.OOE+OO 5.48E+01 Sample ID: 416857 Sample Dates: 6/20/2016 -7/18/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.36E+OO 8.06E-01 1.32E+OO Mn-54 <3.99E+OO O.OOE+OO 3.99E+OO Co-58 <3.06E+OO O.OOE+OO 3.06E+OO Fe-59 <9.64E+OO O.OOE+OO 9.64E+OO Co-60 <4.62E+OO O.OOE+OO 4.62E+OO Zn-65 <6.09E+OO O.OOE+OO 6.09E+OO Zr-95 <9.89E+OO O.OOE+OO 9.89E+OO Nb-95 <4.99E+OO O.OOE+OO 4.99E+OO 1-131 <1.17E+01 O.OOE+OO 1.17E+01 Cs-134 <2.73E+OO O.OOE+OO 2.73E+OO Cs-137 <4.02E+OO O.OOE+OO 4.02E+OO Bala-140 <7.97E+OO O.OOE+OO 7.97E+OO Be-7 <3.71E+01 O.OOE+OO 3.71E+01 K-40 <6.14E+01 O.OOE+OO 6.14E+01 Sample ID: - 418779 Sample Dates: 7/18/2016

8115/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.22E+OO 7.36E-01 1.18E+OO Mn-54 <3.14E+OO O.OOE+OO 3.14E+OO Co-58 <3.02E+OO O.OOE+OO 3.02E+OO Fe-59 <5.80E+OO O.OOE+OO 5.BOE+OO Co-60 <3.46E+OO O.OOE+OO 3.46E+OO Zn-65 <5.02E+OO O.OOE+OO 5.02E+OO Zr-95 *<3.70E+OO 0.00E+OO 3.70E+OO Nb-95 <3.54E+OO 0.00E+OO 3.54E+OO Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 49 of 91 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: DRINKING WATER Concentration (Activity): pCi/I Sample Point 060 [INDICATOR - NE@ 3.23 miles]

Sample ID: 418779 Sample Dates: 7/18/2016 - 8/15/2016 Nuclide Activity 2 Sigma Error MDA 1-131 <1.15E+01 O.OOE+OO 1.15E+01 Cs-134 <3.38E+OO O.OOE+OO 3.38E+OO Cs-137 <2.53E+OO O.OOE+OO 2.53E+OO Bala-140 <6.95E+OO 0.00E+OO 6.95E+OO Be-7 <2.23E+o1 O.OOE+OO 2.23E+01 K-40 <4.94E+01 O.OOE+OO 4.94E+01 Sample ID: 420867 Sample Dates: 5/23/2016 -8/15/2016 Nuclide Activity 2 Sigma Error MDA H3DW <2.50E+01 O.OOE+OO 1.96E+02 Sample ID: 420778 Sample Dates: 8/15/2016 - 9/12/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.38E+OO 7.48E-01 1.19E+OO Mn-54 <1.72E+OO 0.00E+OO 1.72E+OO Co-58 <2.05E+OO O.OOE+OO 2.05E+OO Fe-59 <4.16E+OO O.OOE+OO 4.16E+OO Co-60 <1.76E+OO O.OOE+OO 1.76E+OO Zn-65 <3.37E+OO O.OOE+OO 3.37E+OO Zr-95 <3.92E+OO O.OOE+OO 3.92E+OO Nb-95 <2.81E+OO O.OOE+OO 2.81E+OO 1-131 <1.12E+01 O.OOE+OO 1.12E+01 Cs-134 <2.01E+OO O.OOE+OO 2.01E+OO Cs-137 <1.80E+OO O.OOE+OO 1.80E+OO Bala-140 <6.71E+OO O.OOE+OO 6.71E+OO Be-7 7.94E+OO 1.43E+01 2.40E+01 K-40 4.97E+01 1.96E+01 2.56E+01 Sample ID: 424744 Sample Dates: 9/12/2016 -10/10/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.38E+OO 7.28E-01 1.15E+OO Mn-54 <3.09E+OO O.OOE+OO 3.09E+OO I

Co-58 <3.69E+OO .O.OOE+OO 3.69E+OO Fe-59 <6.78E+OO O.OOE+OO 6.78E+OO Co-60 <2.45E+OO O.OOE+OO 2.45E+OO Zn-65 <5.50E+OO O.OOE+OO 5.50E+OO Zr-95 <5.85E+OO O.OOE+OO 5.85E+OO Nb-95 <3.20E+OO O.OOE+OO 3.20E+OO 1-131 <1.15E+01 O.OOE+OO 1.15E+01 Cs-134 <2.99E+OO O.OOE+OO 2.99E+OO Cs-137 <3.10E+OO O.OOE+OO 3.10E+OO Bala-140 <8.37E+OO O.OOE+OO 8.37E+OO Be-7 <3.05E+01 O.OOE+OO 3.05E+01 K-40 <5.1BE+01 O.OOE+OO 5.1BE+01 Sample ID: 427418 Sample Dates: 10/10/2016 -1117/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.07E+OO 6.87E-01 1.11E+OO Mn-54 <3.11E+OO O.OOE+OO 3.11E+OO Co-58 <3.59E+OO O.OOE+OO 3.59E+OO Fe-59 <3.35E+OO O.OOE+OO 3.35E+OO Co-60 <3.01E+OO 0.00!::+00 3.01E+OO Zn-65 <7.67E+OO O.OOE+OO 7.67E+OO Zr-95 <6.37E+OO O.OOE+OO 6.37E+OO Nb-95 <4.04E+OO O.OOE+OO 4.04E+OO 1-131 <1.14E+01 O.OOE+OO 1.14E+01 Cs-134 <3.01 E+OO O.OOE+OO 3.01E+OO Cs-137 <2.34E+OO O.OOE+OO 2.34E+OO Bala-140 <7.81E+OO O.OOE+OO 7.81E+OO Be-7 <2.53E+01 0.00E+OO 2.53E+01 K-40 <4.99E+01 O.OOE+OO 4.99E+01 Sample ID: 427846 Sample Dates: 8/15/2016 - 12/5/2016 Nuclide Activity 2 Sigma Error MDA H3DW <2.95E+01 O.OOE+OO 1.88E+02 Sample ID: 429631 Sample Dates: 11/7/2016 -12/5/2016 Nuclide Activity 2 Sigma Error MDA Beta 5.88E-01 7.23E-01 1.22E+OO Mn-54 <3.40E+OO O.OOE+OO 3.40E+OO Co-58 <3.31E+OO O.OOE+OO 3.31E+OO Fe-59 <6.13E+OO O.OOE+OO 6.13E+OO Co-60 <3.09E+OO O.OOE+OO 3.09E+OO Zn-65 <5.30E+OO O.OOE+OO 5.30E+OO Zr-95 <6.09E+OO O.OOE+OO 6.09E+OO Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 50 of 91 Duke Energy Annual Report -Appendix E En~ 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: DRINKING WATER Concentration {Activity): pCi/I Sample Point 060 [INDICATOR - NE@ 3.23 miles]

Sample ID: 429631 Sample Dates: '111712016 -12/5/2016 Nuclide Activity 2 Sigma Error MDA Nb-95 <4.72E+OO O.OOE+OO 4.72E+OO 1-131 <1.07E+01 O.OOE+OO 1.07E+01 Cs-134 <3.77E+OO O.OOE+OO 3.77E+OO Cs-137 <3.56E+OO O.OOE+OO 3.56E+OO Bala-140 <7.35E+OO O.OOE+OO 7.35E+OO Be-7 <2.80E+01 O.OOE+OO 2.80E+01 K-40 4.26E+01 2.37E+01 2.80E+01 Sample Point 064 [CONTROL - SSW@ 6.67 miles]

Sample ID: 398480 Sample Dates: 12/7/2015 -1/5/2016 Nuclide Activity 2 Sigma Error MDA Beta <5.36E-01 O.OOE+OO 1.23E+OO Mn-54 <3.84E+OO O.OOE+OO 3.84E+OO Co-58 <3.90E+OO O.OOE+OO 3.90E+OO Fe-59 <9.55E+OO O.OOE+OO 9.55E+OO Co-60 <2.68E+OO O.OOE+OO 2.68E+OO Zn-65 <7.26E+OO O.OOE+OO 7.26E+OO Zr-95 <6.12E+OO 0.00E+OO 6.12E+OO Nb-95 <4.26E+OO O.OOE+OO 4.26E+OO 1-131 <1.14E+01 O.OOE+OO 1.14E+01 Cs-134 <3.08E+OO O.OOE+OO 3.08E+OO Cs-137 <3.12E+OO O.OOE+OO 3.12E+OO Bala-140 <1.16E+01 O.OOE+OO 1.16E+01 Be-7 <3.35E+01 O.OOE+OO 3.35E+01 K-40 <5.55E+01 0.00E+OO 5.55E+01 Sample ID: 400162 Sample Dates: 1/5/2016 - 2/1/2016 Nuclide Activity 2 Sigma Error MDA Beta 8.47E-01 7.02E-01 1.15E+OO Mn-54 <3.93E+OO O.OOE+OO 3.93E+OO Co-58 <3.30E+OO O.OOE+OO 3.30E+OO Fe-59 <6.07E+OO O.OOE+OO 6.07E+OO Co-60 <4.68E+OO O.OOE+OO 4.68E+OO Zn-65 <8.01 E+OO O.OOE+OO 8.01E+OO Zr-95 <7.73E+OO O.OOE+OO 7.73E+OO Nb-95 <5.59E+OO O.OOE+OO 5.59E+OO 1-131 <1.19E+01 O.OOE+OO 1.19E+01 Cs-134 <4.13E+OO O.OOE+OO 4.13E+OO Cs-137 <4.83E+OO O.OOE+OO 4.83E+OO Bala-140 <1.19E+01 O.OOE+OO 1.19E+01 Be-7 <2.72E+01 O.OOE+OO 2.72E+01 K-40 <5.95E+01 O.OOE+OO 5.95E+01 Sample ID: 401967 Sample Dates: 2/1/2016 -2/29/2016 Nuclide Activity 2 Sigma Error MDA Beta 7.78E-01 7.09E-01 1.17E+OO Mn-54 <4.46E+OO O.OOE+OO 4.46E+OO Co-58 <4.48E+OO O.OOE+OO 4.48E+OO Fe-59 <9.33E+OO O.OOE+OO 9.33E+OO Co-60 <4.31E+OO O.OOE+OO 4.31E+OO Zn-65 <7.11 E+OO O.OOE+OO 7.11E+OO Zr-95 <9.59E+OO O.OOE+.00 9.59E+OO Nb-95 <5.33E+OO O.OOE+OO 5.33E+OO 1-131 <1.12E+01 O.OOE+OO 1.12E+01 Cs-134 <3.56E+OO O.OOE+OO 3.56E+OO Cs-137 <5.05E+OO O.OOE+OO 5.05E+OO Bala-140 <9.43E+OO O.OOE+OO 9.43E+OO Be-7 <3.15E+01 O.OOE+OO 3.15E+01 K-40 3.00E+01 2.53E+01 3.35E+01 Sample ID: 403613 Sample Dates: 12/7/2015 - 2/29/2016 Nuclide Activity 2 Sigma Error MDA H3DW <-6.1 E+01 O.OOE+OO 1.96E+02 Sample ID: 405639 Sample Dates: 2/29/2016 - 3/28/2016 Nuclide Activity 2 Sigma Error MDA Beta 8.59E-01 7.06E-01 1.16E+OO Mn-54 <1.55E+OO O.OOE+OO 1.55E+OO Co-58 <1.85E+OO O.OOE+OO 1.85E+OO Fe-59 <3.59E+OO O.OOE+OO 3.59E+OO Co-60 <1.70E+OO O.OOE+OO 1.70E+OO Zn-65 <3.69E+OO O.OOE+OO 3.69E+OO Zr-95 <3.55E+OO O.OOE+OO 3.55E+OO Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 51 of 91 Duke Energy Annual Report - Appendix E En:=J 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report- 2016 (Appendix E)

Media Type: DRINKING WATER Concentration (Activity): pCi/I Sample Point 064 [CONTROL - SSW@ 6.67 miles]

Sample ID: 405639 Sample Dates: 2/2912016 -3128/2016 Nuclide Activity 2 Sigma Erro'r MDA Nb-95 <2.50E+OO O.OOE+OO 2.50E+OO 1-131 <1.18E+01 O.OOE+OO 1.18E+01 Cs-134 <1.65E+OO O.OOE+OO 1.65E+OO Cs-137 <1.53E+OO 0.00E+OO 1.53E+OO Bala-140 <5.99E+OO O.OOE+OO 5.99E+OO Be-7 <1.58E+01 O.OOE+OO 1.58E+01 K-40 2.55E+01 1.72E+01 2.64E+01 Sample ID: 408523 Sample Dates: 3/2812016 - 412512016 Nuclide Activity 2 Sigma Error MDA Beta 1.03E+OO 7.73E-01 1.27E+OO Mn-54 <2.47E+OO O.OOE+OO 2.47E+OO Co-58 <2.61E+OO O.OOE+OO 2.61E+OO Fe-59 <4.21E+OO O.OOE+OO 4.21E+OO Co-60 <2.82E+OO O.OOE+OO 2.82E+OO Zn-65 <3.90E+OO O.OOE+OO 3.90E+OO Zr-95 <4.63E+OO O.OOE+OO 4.63E+OO Nb-95 <2.68E+OO O.OOE+OO 2.68E+OO 1-131 <1.08E+01 O.OOE+OO 1.08E+01 Cs-134 <2.88E+OO O.OOE+OO 2.88E+OO Cs-137 <2.06E+OO O.OOE+OO 2.06E+OO Bala-140 <6.03E+OO O.OOE+OO 6.03E+OO Be-7 <2.69E+01 O.OOE+OO 2.69E+01 K-40 <3.33E+01 O.OOE+OO 3.33E+01 Sample ID: 411596 Sample Dates: 412512016 - 5/2312016 Nuclide Activity 2 Sigma Error MDA Beta 9.14E-01 8.21E-01 1.36E+OO Mn-54 <2.81E+OO O.OOE+OO 2.81E+OO Co-58 <2.70E+OO O.OOE+OO 2.70E+OO Fe-59 <7.15E+OO O.OOE+OO 7.15E+OO Co-60 <4.22E+OO O.OOE+OO 4.22E+OO Zn-65 <5.99E+OO O.OOE+OO 5.99E+OO Zr-95 <6.60E+OO O.OOE+OO 6.60E+OO Nb-95 <3.81E+OO O.OOE+OO 3.81 E+OO 1-131 <1.18E+01 O.OOE+OO 1.18E+01 Cs-134 <2.50E+OO O.OOE+OO 2.50E+OO Cs-137 <2.27E+OO O.OOE+OO 2.27E+OO Bala-140 <8.60E+OO O.OOE+OO 8.60E+OO Be-7 <3.04E+01 O.OOE+OO 3.04E+01 K-40 4.52E+01 2.26E+01 2.30E+01 Sample ID: 413187 Sample Dates: 2/29/2016 - 5123/2016 Nuclide Activity 2 Sigma Error MDA H3DW <3.97E+01 O.OOE+OO 1.96E+02 Sample ID: 413519 Sample Dates: 5/23/2016 - 6/20/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.52E+OO 7.71 E-01 1.22E+OO Mn-54 <3.21E+OO O.OOE+OO 3.21E+OO Co-58 <3.06E+OO O.OOE+OO 3.06E+OO Fe-59 <6.95E+OO O.OOE+OO 6.95E+OO Co-60 <3.85E+OO O.OOE+OO 3.85E+OO Zn-65 <7.38E+OO O.OOE+OO 7.38E+OO Zr-95 <5.42E+OO O.OOE+OO 5.42E+OO Nb-95 <3.75E+OO O.OOE+OO 3.75E+OO 1-131 <1.20E+01 O.OOE+OO 1.20E+01 Cs-134 <3.18E+OO O.OOE+OO 3.18E+OO Cs-137 <3.30E+OO O.OOE+OO 3.30E+OO Bala-140 <8.81E+OO O.OOE+OO 8.81E+OO Be-7 <2.74E+01 O.OOE+OO 2.74E+01 K-40 <6.18E+01 O.OOE+OO 6.18E+01 Sample ID: 416858 Sample Dates: 6/20/2016 -7/18/2016 Nuclide Activity 2 Sigma Error MDA Beta 9.45E-01 7.88E-01 1.32E+OO Mn-54 <2.66E+OO O.OOE+OO 2.66E+OO Co-58 <3.24E+OO O.OOE+OO 3.24E+OO Fe-59 <5.46E+OO 0.00E+OO 5.46E+OO Co-60 <2.59E+OO O.OOE+OO 2.59E+OO Zn-65 <4.76E+OO O.OOE+OO 4.76E+OO Zr-95 <4.89E+OO O.OOE+OO 4.89E+OO Nb-95 * <3.22E+OO O.OOE+OO 3.22E+OO 1-131 <9.99E+OO O.OOE+OO 9.99E+OO Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 52 of 91 Duke Energy Annual Report -Appendix E En~ 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: DRINKING WATER Concentration {Activity): pCi/I Sample Point 064 [CONTROL - SSW@ 6.67 miles]

Sample ID: 416858 Sample Dates: 6/20/2016 - 7/18/2016 Nuclide Activity 2 Sigma Error MDA Cs-134 <2.64E+OO O.OOE+OO 2.64E+OO Cs-137 <2.89E+OO O.OOE+OO 2.89E+OO Bala-140 <8.17E+OO O.OOE+OO 8.17E+OO Be-7 <1.94E+01 O.OOE+OO 1.94E+01 K-40 <4.55E+01 O.OOE+OO 4.55E+01 Sample ID: 418780 Sample Dates: 7/18/2016, -8/15/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.23E+OO 7.37E-01 1.18E+OO Mn-54 <2.50E+OO O.OOE+OO 2.50E+OO Co-58 <2.78E+OO O.OOE+OO 2.78E+OO Fe-59 <5.91E+OO O.OOE+OO 5.91E+OO Co-60 <3.18E+OO O.OOE+OO 3.18E+OO Zn-65 <5.11E+OO O.OOE+OO 5.11E+OO Zr-95 <5.42E+OO O.OOE+OO 5.42E+OO Nb-95 <3.97E+OO O.OOE+OO 3.97E+OO 1-131 <1.11 E+01 O.OOE+OO 1.11E+01 Cs-134 <3.52E+OO O.OOE+OO 3.52E+OO Cs-137 <3.82E+OO O.OOE+OO 3.82E+OO Bala-140 <6 ..38E+OO O.OOE+OO 6.38E+OO Be-7 <2.15E+01 0.00E+OO 2.15E+01 K-40 <5.04E+01 O.OOE+OO 5.04E+01 Sample ID: 420868 Sample Dates: 5/23/2016 - 8/15/2016 Nuclide Activity 2 Sigma Error MDA H3DW <2.49E+01 O.OOE+OO 1.95E+02 Sample ID: 420779 Sample Dates: 8/15/2016 -9/12/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.35E+OO 7.47E-01 1.19E+OO Mn-54 <2.19E+OO O.OOE+OO 2.19E+OO Co-58 <2.99E+OO O.OOE+OO 2.9,9E+OO Fe-59 <5.15E+OO O.OOE+OO 5.15E+OO Co-60 <2.32E+OO O.OOE+OO 2.32E+OO Zn-65 <4.76E+OO O.OOE+OO 4.76E+OO Zr-95 <4.80E+OO O.OOE+OO 4.BOE+OO Nb-95 <3.13E+OO O.OOE+OO 3.13E+OO 1-131 <1.18E+01 O.OOE+OO 1.18E+01 Cs-134 <2.46E+OO O.OOE+OO 2.46E+OO Cs-137 <2.86E+OO O.OOE+OO 2.86E+OO Bala-140 <8.28E+OO O.OOE+OO 8.28E+OO Be-7 <2.35E+01 O.OOE+OO 2.35E+01 K-40 <3.10E+01 O.OOE+OO 3.10E+01 Sample ID: 424745 Sample Dates: 9/12/2016 -10/10/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.36E+OO 7.31 E-01 1.15E+OO Mn-54 <3.81E+OO O.OOE+OO 3.81E+OO Co-58 <3.83E+OO O.OOE+OO 3.83E+OO Fe-59 <7.58E+OO O.OOE+OO 7.58E+OO Co-60 <3.33E+OO O.OOE+OO 3.33E+OO Zn-65 <7.43E+OO O.OOE+OO 7.43E+OO Zr-95 <6.79E+OO O.OOE+OO 6.79E+OO Nb-95 <4.48E+OO O.OOE+OO 4.48E+OO 1-131 <1.16E+01 O.OOE+OO 1.16E+01 Cs-134 <3.20E+OO O.OOE+OO 3.20E+OO Cs-137 <3.45E+OO O.OOE+OO 3.45E+OO Bala-140 <7.73E+OO O.OOE+OO 7.73E+OO Be-7 <3.42E+01 O.OOE+OO 3.42E+01 K-40 <5.79E+01 O.OOE+OO 5.79E+01 Sample ID: 427419 Sample Dates: 10/10/2016 -11/7/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.82E+OO 7.24E-01 1.11E+OO Mn-54 <2.90E+OO O.OOE+OO 2.90E+OO Co-58 <2.67E+OO 0.00E+OO 2.67E+OO Fe-59 <6.40E+OO O.OOE+OO 6.40E+OO Co-60 <2.53E+OO O.OOE+OO 2.53E+OO Zn-65 <6.70E+OO O.OOE+OO 6.70E+OO Zr-95 <4.52E+OO O.OOE+OO 4.52E+OO Nb-95 <4.35E+OO O.OOE+OO 4.35E+OO 1-131 <1.13E+01 O.OOE+OO 1.13E+01 Cs-134 <3.58E+OO* O.OOE+OO 3.58E+OO Cs-137 <2.89E+OO O.OOE+OO 2.89E+OO Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 53 of 91 Duke Energy Annual Report -Appendix E En~ 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: DRINKING WATER Concentration (Activity): pCi/I Sample Point 064 [CONTROL - SSW@ 6.67*miles]

Sampie ID: 427419 Sample Dates: 10/10/2016 -11/7/2016 Nuclide Activity 2 Sigma Error MDA Bala-140 <5.09E+OO O.OOE+OO 5.09E+OO Be-7 <2.48E+01 O.OOE+OO 2.48E+01 K-40 <4.79E+01 O.OOE+OO 4.79E+01 Sample ID: 427847 Sample Dates: 8/15/2016 - 12/5/2016 Nuclide Activity 2 Sigma Error MDA H3DW <-1.8E+01 O.OOE+OO 1.88E+02 Sample ID: 429632 Sample Dates: 11/7/2016 -12/5/2016 Nuclide Activity 2 Sigma Error MDA Beta <3.20E-01 O.OOE+OO 1.22E+OO Mn-54 <2.96E+OO O.OOE+OO 2.96E+OO Co-58 <3.91E+OO O.OOE+OO 3.91E+OO Fe-59 <6.50E+OO O.OOE+OO 6.50E+OO Co-60 <2.32E+OO O.OOE+OO 2.32E+OO Zn-65 <5.53E+OO O.OOE+OO 5.53E+OO Zr-95 <7.17E+OO O.OOE+OO 7.17E+OO Nb-95 <4.85E+OO O.OOE+OO 4.85E+OO 1-131 <1.06E+01 O.OOE+OO 1.06E+01 Cs-134 <3.28E+OO O.OOE+OO 3.28E+OO Cs-137 <3.63E+OO O.OOE+OO 3.63E+OO Bala-140 <5.20E+OO O.OOE+OO 5.20E+OO Be-7 <2.74E+01 O.OOE+OO 2.74E+01 K-40 <6.56E+01 O.OOE+OO 6.56E+01 Sample Point 066 [INDICATOR- SSE@ 18.9 miles]

Sample ID: 398481 Sample Dates: 12/7/2015 -1/5/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.36E+OO 7.70E-01 1.23E+OO Mn-54 <2.59E+OO O.OOE+OO 2.59E+OO Co-58 <2.98E+OO O.OOE+OO 2.98E+OO Fe-59 <6.50E+OO O.OOE+OO 6.50E+OO Co-60 <2.74E+OO O.OOE+OO 2.74E+OO Zn-65 <5.05E+OO O.OOE+OO 5.05E+OO Zr-95 <5.73E+OO O.OOE+OO 5.73E+OO Nb-95 <3.83E+OO O.OOE+OO 3.83E+OO 1-131 <1.16E+01 O.OOE+OO 1.16E+01 Cs-134 <3.04E+OO O.OOE+OO 3.04E+OO Cs-137 <2.50E+OO O.OOE+OO 2.50E+OO Bala-140 <6.01E+OO O.OOE+OO 6.01E+OO Be-7 <2.17E+01 O.OOE+OO 2.17E+01 K-40 <4.44E+01 O.OOE+OO 4.44E+01 Sample ID: 400163 Sample Dates: 1/5/2016 - 2/1/2016 Nuclide Activity 2 Sigma Error MDA Beta 2.24E+OO 8.11E-01 1.24E+OO Mn-54 <3.39E+OO O.OOE+OO 3.39E+OO Co-58 <3.34E+OO O.OOE+OO 3.34E+OO Fe-59 <6.08E+OO O.OOE+OO 6.08E+OO Co-60 <4.32E+OO O.OOE+OO 4.32E+OO Zn-65 <7.94E+OO O.OOE+OO 7.94E+OO Zr-95 <5.92E+OO O.OOE+OO 5.92E+OO Nb-95 <5.50E+OO O.OOE+OO 5.50E+OO 1-131 <1.20E+01 O.OOE+OO 1.20E+01 Cs-134 <3.11 E+OO O.OOE+OO 3.11E+OO Cs-137 <3.89E+OO O.OOE+OO 3.89E+OO Bala-140 <1.03E+01 O.OOE+OO 1.03E+01 Be-7 <3.00E+01 O.OOE+OO 3.00E+01 K-40 <4.76E+01 O.OOE+OO 4.76E+01 Sample ID: 401968 Sample Dates: 2/1 /2016 - 2/29/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.61 E+OO 7.52E-01 1.18E+OO Mn-54 <2.74E+OO O.OOE+OO 2.74E+OO Co-58 <3.05E+OO O.OOE+OO 3.05E+OO Fe-59 <8.51E+OO O.OOE+OO 8.51E+OO Co-60 <3.11E+OO O.OOE+OO 3.11E+OO Zn-65 <5.72E+OO O.OOE+OO 5.72E+OO Zr-95 <5.40E+OO O.OOE+OO . 5.40E+OO Nb-95 <3.09E+OO O.OOE+OO 3.09E+OO 1-131 <1.11E+01 O.OOE+OO 1.11E+01 Cs-134 <3.66E+OO O.OOE+OO 3.66E+OO Cs-137 <3.19E+OO O.OOE+OO 3.19E+OO Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 54 of 91 Duke Energy Annual Report -Appendix E En~ 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Re1Port- 2016 (Appendix E)

Media Type: DRINKING WATER Concentration (Activity): pCi/I Sample Point 066 [INDICATOR - SSE @ 18.9 miles]

Sample ID: 401968 Sample Dates: 2/1 /2016 _.2/29/2016 Nuclide Activity 2 Sigma Error MDA Bala-140 <9.38E+OO O.OOE+OO 9.38E+OO Be-7 <2.88E+01 O.OOE+OO 2.88E+01 K-40 <5.14E+01 O.OOE+OO 5.14E+01 Sample ID: 403614 Sample Dates: 1217/2015 - 2/29/2016 Nuclide Activity 2 Sigma Error MDA H3DW 2.96E+02 1.22E+02 1.96E+02 Sample ID: 405640 Sample Dates: 2/29/2016 - 3/28/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.50E+OO 7.44E-01 1.17E+OO Mn-54 <1.29E+OO O.OOE+OO 1.29E+OO Co-58 <1.66E+OO O.OOE+OO 1.66E+OO Fe-59 <3.46E+OO O.OOE+OO 3.46E+OO Co-60 <1.32E+OO O.OOE+OO 1.32E+OO Zn-65 <2.32E+OO O.OOE+OO 2.32E+OO Zr-95 <2.89E+OO O.OOE+OO 2.89E+OO Nb-95 <2.20E+OO O.OOE+OO 2.20E+OO 1-131 <9.93E+OO O.OOE+OO 9.93E+OO Cs-134 <1.42E+OO O.OOE+OO 1.42E+OO Cs-137 <1.39E+OO O.OOE+OO 1.39E+OO Bala-140 <4.66E+OO O.OOE+OO 4.66E+OO Be-7 <1.29E+01 O.OOE+OO 1.29E+01 K-40 6.19E+01 1.56E+01 1.86E+01 Sample ID: 408524 Sample Dates: 3/28/2016 - 4/25/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.14E+OO 7.81 E-01 1.27E+OO Mn-54 <2.38E+OO O.OOE+OO 2.38E+OO Co-58 <2.97E+OO O.OOE+OO 2.97E+OO Fe-59 <6.07E+OO O.OOE+OO 6.07E+OO Co-60 <~.91E+OO O.OOE+OO 2.91E+OO Zn-65 <5.63E+OO O.OOE+OO 5.63E+OO Zr-95 <4.51E+OO O.OOE+OO 4.51E+OO Nb-95 <3.77E+OO O.OOE+OO 3.77E+OO 1-131 <9.76E+OO O.OOE+OO 9.76E+OO Cs-134 <3.57E+OO O.OOE+OO 3.57E+OO Cs-137 <3.38E+OO O.OOE+OO 3.38E+OO Bala-140 <5.60E+OO O.OOE+OO 5.60E+OO Be-7 <2.35E+01 O.OOE+OO 2.35E+01 K-40 <4.63E+01 O.OOE+OO 4.63E+01 Sample ID: 411597 Sample Dates: 4/25/2016 - 5/23/2016 Nuclide Activity 2 Sigma Error MDA Beta <2.03E-01 O.OOE+OO 1.36E+OO Mn-54 <3.16E+OO O.OOE+OO 3.16E+OO Co-58 <2.70E+OO 0.00E+OO 2.70E+OO Fe-59 <6.08E+OO O.OOE+OO 6.08E+OO Co-60 <2.66E+OO O.OOE+OO 2.66E+OO Zn-65 <3.68E+OO O.OOE+OO 3.68E+OO Zr-95 <5.27E+OO O.OOE+OO 5.27E+OO Nb-95 <3.57E+OO O.OOE+OO 3.57E+OO 1-131 <1.10E+01 O.OOE+OO 1.10E+01 Cs-134 <2.20E+OO O.OOE+OO 2.20E+OO Cs-137 <2.53E+OO O.OOE+OO 2.53E+OO Bala-140 <6.42E+OO O.OOE+OO 6.42E+OO Be-7 <2.48E+01 O.OOE+OO 2.48E+01 K-40 5.28E+01 2.61E+01 3.47E+01 Sample ID: 413188 Sample Dates: 2/29/2016 - 5/23/2016 Nuclide Activity 2 Sigma Error MDA H3DW 2.95E+02 1.24E+02 1.96E+02 Sample ID: 413520 Sample Dates: 5/23/2016 - 6/20/2016 Nuclide Activity 2 Sigma Error MDA Beta <5.09E-01 O.OOE+OO 1.23E+OO Mn-54 <2.91E+OO O.OOE+OO 2.91E+OO Co-58 <2.76E+OO O.OOE+OO 2.76E+OO Fe-59 <6.05E+OO O.OOE+OO 6.05E+OO Co-60 <2.40E+OO O.OOE+OO 2.40E+OO Zn-65 * <3.13E+OO O.OOE+OO 3.13E+OO Zr-95 <5.42E+OO O.OOE+OO 5.42E+OO Nb-95 <3.33E+OO O.OOE+OO 3.33E+OO 1-131. <1.16E+01 O.OOE+OO 1_.16E+01 Cs-134 <2.74E+OO O.OOE+OO 2.74E+OO Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 55 of 91 Duke Energy Annual Report -Appendix E En?> 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: DRINKING WATER Concentration (Activity): pCill Sample Point 066 [INDICATOR - SSE@ 1 B.9 miles]

Sample ID: 413520 Sample Dates: 5/23/2016 - 6/20/2016 Nuclide Activity 2 Sigma Error MDA Cs-137 <2.74E+OO O.OOE+OO 2.74E+OO Bala-140 <5.54E+OO O.OOE+OO 5.54E+OO Be-7 <2.15E+01 O.OOE+OO 2.15E+01 K-40 <5.04E+01 0.00E+OO 5.04E+01 Sample ID: 416859 Sample Dates: 6/20/2016 - 7/18/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.13E+OO 8.01 E-01 1.33E+OO Mn-54 <3.41E+OO O.OOE+OO 3.41E+OO Co-58 <4.00E+OO O.OOE+OO 4.00E+OO Fe-59 <5.11 E+OO O.OOE+OO 5.11E+OO Co-60 <3.03E+OO O.OOE+OO 3.03E+OO Zn-65 <7.95E+OO O.OOE+OO 7.95E+OO Zr-95 <5.95E+OO O.OOE+OO 5.95E+OO Nb-95 <4.50E+OO O.OOE+OO 4.50E+OO 1-131 <1.19E+01 O.OOE+OO 1.19E+01 Cs-134 <3.34E+OO O.OOE+OO 3.34E+OO Cs-137 <2.81E+OO O.OOE+OO 2.81E+OO Bala-140 <7.26E+OO O.OOE+OO 7.26E+OO Be-7 <3.36E+01 O.OOE+OO 3.36E+01 K-40 5.32E+01 3.50E+01 5.10E+01 Sample ID: 418781 Sample Dates: 7/18/2016 - 8/15/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.70E+OO 7.65E-01 1.19E+OO Mn-54 <2.81E+OO O.OOE+OO 2.81E+OO Co-58 <3.40E+OO O.OOE+OO 3.40E+OO Fe-59 <5.57E+OO O.OOE+OO 5.57E+OO Co-60 <2.46E+OO O.OOE+OO 2.46E+OO Zn-65 <5.75E+OO O.OOE+OO 5.75E+OO Zr-95 <6.33E+OO O.OOE+OO 6.33E+OO Nb-95 <3.73E+OO O.OOE+OO 3.73E+OO 1-131 <1.12E+01 O.OOE+OO 1.12E+01 Cs-134 <3.02E+OO O.OOE+OO 3.02E+OO Cs-137 <2.96E+OO O.OOE+OO 2.96E+OO Bala-140 <6.32E+OO O.OOE+OO 6.32E+OO Be-7 <2.73E+01 O.OOE+OO 2.73E+01 K-40 7.05E+01 2.86E+01 3.15E+01 Sample ID: 420869 Sample Dates: 5/23/2016 - 8/15/2016 Nuclide Activity 2 Sigma Error MDA H3DW 3.10E+02 1.23E+02 1.97E+02 Sample ID: 420780 Sample Dates: 8/15/2016 -9/12/2016 Nuclide Activity 2 Sigma Error MDA Beta 6.00E-01 7.15E-01 1.20E+OO Mn-54 <2.22E+OO O.OOE+OO 2.22E+OO Co-58 <2.26E+OO O.OOE+OO 2.26E+OO Fe-59 <5.70E+OO O.OOE+OO 5.70E+OO Co-60 <2.01E+OO O.OOE+OO 2.01E+OO Zn-65 <3.24E+OO O.OOE+OO 3.24E+OO Zr-95 <4.03E+OO a°.OOE+OO 4.03E+OO Nb-95 <2.87E+OO O.OOE+OO 2.87E+OO 1-131 <1.18E+p1 0.00E+OO 1.18E+01 Cs-134 <2.35E+OO O.OOE+OO 2.35E+OO Cs-137 <2.42E+OO O.OOE+OO 2.42E+OO Bala-140 <5.14E+OO O.OOE+OO 5.14E+OO Be-7 <2.00E+01 O.OOE+OO 2.00E+01 K-40 4.40E+01 2.23E+01 3.0BE+01 Sample ID: 424746 Sample Dates: 9/12/2016 -10/10/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.86E+OO 7.58E-01 1.16E+OO Mn-54 <3.20E+OO O.OOE+OO 3.20E+OO Co-58 <3.56E+OO O.OOE+OO 3.56E+OO Fe-59 <7.21E+OO O.OOE+OO 7.21E+OO Co-60 <2.39E+OO O.OOE+OO 2.39E+OO Zn-65 <5.69E+OO O.OOE+OO 5.69E+OO Zr-95 <5.35E+OO O.OOE+OO 5.35E+OO Nb-95 <4.54E+OO O.OOE+OO 4.54E+OO 1-131 <1.17E+01 O.OOE+OO 1.17E+01 Cs-134 <3.19E+OO O.OOE+OO 3.19E+OO Cs-137 <3.50E+OO O.OOE+OO 3.50E+OO Bala-140 <1.03E+01 O.OOE+OO 1.03E+01 EnRad Laboratories En =9 Report Generated @ 4/4/2017 13:40:53 Appendix E - Page 56 of 91 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: DRINKING WATER Concentration (Activity): pCi/I Sample Point 066 [INDICATOR - SSE@ 18.9 miles]

Sample ID: 424746 Sample Dates: 9/12/2016 -10/10/2016 Nuclide Activity 2 Sigma Error MDA Be-7 <3.12E+01 O.OOE+OO 3.12E+01 K-40 <5.14E+01 O.OOE+OO 5.14E+01 Sample ID: 427420 Sample Dates: 10/10/2016 -11/7/2016 Nuclide Activity 2 Sigma Error MDA Beta 1.22E+OO 8.89E-01 1.45E+OO Mn-54 <2.28E+OO O.OOE+OO 2.28E+OO Co-58 <2.88E+OO 0,00E+OO 2.88E+OO Fe-59 <5.84E+OO O.OOE+OO 5.84E+OO Co-60 <2.29E+OO O.OOE+OO 2.29E+OO Zn-65 <4.98E+OO O.OOE+OO 4.98E+OO Zr-95 <3.80E+OO O.OOE+OO 3.80E+OO Nb-95 <3.06E+OO O.OOE+OO 3.06E+OO 1-131 <1.02E+01 O.OOE+OO 1.02E+01 Cs-134 <2.62E+OO O.OOE+OO 2.62E+OO Cs-137 <3.10E+OO O.OOE+OO 3.10E+OO Bala-140 <6.47E+OO O.OOE+OO 6.47E+OO Be-7 <2.55E+01 O.OOE+OO 2.55E+01 K-40 <4.25E+01 O.OOE+OO 4.25E+01 Sample ID: 427848 Sample Dates: 8/15/2016 -12/5/2016 Nuclide Activity 2 Sigma Error MDA H3DW 3.68E+02 1.19E+02 1.88E+02 Sample ID: 429633 Sample Dates: 11/7/2016 -12/5/2016 Nuclide Activity 2 Sigma Error MDA Beta <5.58E-01 O.OOE+OO 1.25E+OO Mn-54 <3.12E+OO O.OOE+OO 3.12E+OO Co-58 <3.07E+OO O.OOE+OO 3.07E+OO Fe-59 <6.99E+OO O.OOE+OO 6.99E+OO Co-60 <3.87E+OO O.OOE+OO 3.87E+OO Zn-65 <6.14E+OO O.OOE+OO 6.14E+OO Zr-95 <4.91 E+OO O.OOE+OO 4.91E+OO Nb-95 <3.76E+OO O.OOE+OO 3.76E+OO 1-131 <1.18E+01 O.OOE+OO 1.18E+01 Cs-134 <4.22E+OO O.OOE+OO 4.22E+OO Cs-137 <3.51 E+OO O.OOE+OO 3.51E+OO Bala-140 <5.81E+OO O.OOE+OO 5.81E+OO Be-7 <2.76E+01 O.OOE+OO 2.76E+01 K-40 5.82E+01 2.94E+01 3.59E+01 Media Type: FISH Concentration (Activity): pCi/kg wet Sample Point 060 [CONTROL FISH /INDICATOR - NE @ 3.23 miles]

Sample ID: 407428 Sample Dates: 4/5/2016 - 4/5/2016 FREESWIM Nuclide Activity 2 Sigma Error MDA Mn-54 <1.02E+01 O.OOE+OO 1.02E+01 Co-58 <9.03E+OO O.OOE+OO 9.03E+OO Fe-59 <3.38E+01 O.OOE+OO 3.38E+01 Co-60 <1.45E+01 O.OOE+OO 1.45E+01 Zn-65 <3.96E+01 O.OOE+OO 3.96E+01 Nb-95 <1.06E+01 O.OOE+OO 1.06E+01 1-131 <1.58E+01 O.OOE+OO 1.58E+01 Cs-134 <1.27E+01 O.OOE+OO 1.27E+01 Cs-137 <2.34E+01 O.OOE+OO 2.34E+01 Be-7 <7.64E+01 O.OOE+OO 7.64E+01 K-40 3.83E+03 5.55E+02 1.68E+02 Ag-110M <7.67E+OO O.OOE+OO 7.67E+OO Sb-122 <6.90E+01 O.OOE+OO 6.90E+01 Sb-125 <2.89E+01 O.OOE+OO 2.89E+01 Sample ID: 407429 Sample Dates: 4/5/2016 - 4/5/2016 BOTMFEEDER Nuclide Activity 2 Sigma Error MDA Mn-54 <1.79E+01 O.OOE+OO 1.79E+01 Co-58 <1.40E+01 O.OOE+OO 1.40E+01 Fe-59 <3.67E+01 O.OOE+OO 3.67E+01 Co-60 <2.59E+01 O.OOE+OO 2.59E+01 Zn-65 <4.24E+01 O.OOE+OO 4.24E+01 Nb-95 <1.98E+01 O.OOE+OO 1.98E+01 1-131 <2.50E+01 O.OOE+OO 2.50E+01 Cs-134 <2.13E+01 O.OOE+OO 2.13E+01 Cs-137 1.31 E+01 1.48E+01 2.37E+01 Be-7 <1.26E+02 O.OOE+OO 1.26E+02 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 57 of 91 Duke Energy Annual Report -Appendix E En=9 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: FISH Concentration (Activity): pCi/kg wet Sample Point 060 [CONTROL FISH /INDICATOR - NE@ 3.23 miles J Saniple ID: 407429 Sample Dates: 4/5/2016 -4/5/2016 BOTMFEEDER Nuclide Activity 2 Sigma Error MDA K-40 3.39E+03 5.97E+02 3.40E+02 Ag-110M <1.65E+01 O.OOE+OO 1.65E+01 Sb-122 <9.14E+01 O.OOE+OO 9.14E+01 Sb-125 <4.01E+01 O.OOE+OO 4.01E+01 Sample ID: 425293 Sample Dates: 10/10/2016 -10/10/2016 FREESWIM Nuclide Activity 2 Sigma Error MDA Mn-54 <2.16E+01 O.OOE+OO 2.16E+01 Co-58 <1.93E+01 O.OOE+OO 1.93E+01 Fe-59 <2.91E+01 O.OOE+OO 2.91E+01 Co-60 <1.83E+01 O.OOE+OO 1.83E+01 Zn-65 <5.48E+01 O.OOE+OO 5.48E+01 Nb-95 <1.76E+01 O.OOE+OO 1.76E+01 1-131 <1.48E+01 O.OOE+OO 1.48E+01 Cs-134 <2.54E+01 O.OOE+OO 2.54E+01 Cs-137 <2.48E+01 O.OOE+OO 2.48E+01 Be-7 <1.13E+02 O.OOE+OO 1.13E+02 K-40 3.95E+03 6.65E+02 3.42E+02 Ag-110M <2.05E+01 O.OOE+OO 2.05E+01 Sb-122 <3.91E+01 O.OOE+OO 3.91E+01 Sb-125 <3.54E+01 O.OOE+OO 3.54E+01 Sample ID: 425294 Sample Dates: 10/10/2016 -10/10/2016 BOTMFEEDER Nuclide Activity 2 Sigma Error MDA Mn-54 <1.47E+01 O.OOE+OO 1.47E+01 Co-58 <1.27E+01 O.OOE+OO 1.27E+01 Fe-59 <4.11 E+01 O.OOE+OO 4.11E+01 Co-60 <2.37E+01 O.OOE+OO 2.37E+01 Zn-65 <4.15E+01 O.OOE+OO 4.15E+01 Nb-95 <1.76E+01 O.OOE+OO 1.76E+01 1-131 <1.48E+01 O.OOE+OO < 1.48E+01 Cs-134 <1.83E+01 O.OOE+OO 1.B3E+01 Cs-137 <2.57E+01 O.OOE+OO 2.57E+01 Be-7 <B.04E+01 O.OOE+OO B.04E+01 K-40 3.26E+03 6.05E+02 3.83E+02 Ag-110M <8.66E+OO O.OOE+OO B.66E+OO Sb-122 <4.4BE+01 O.OOE+OO 4.48E+01 Sb-125 <3.56E+01 O.OOE+OO 3.56E+01 Sample Point 063 [ INDICATOR - ESE @ 0.8 miles J Sample ID: 407430 Sample Dates: 4/5/2016 -4/5/2016 FREESWIM Nuclide Activity 2 Sigma Error MDA Mn-54 <1.37E+01 0.00E+OO 1.37E+01 Co-58 <2.28E+01 O.OOE+OO 2.28E+01 Fe-59 <5.01E+01 O.OOE+OO 5.01E+01 Co-60 <2.29E+01 O.OOE+OO 2.29E+01 Zn-65 <4.92E+01 O.OOE+OO 4.92E+01 Nb-95 <2.17E+01 O.OOE+OO 2.17E+01 1-131 <2.78E+01 O.OOE+OO 2.78E+01 Cs-134 <1.78E+01 O.OOE+OO 1.78E+01 Cs-137 <2.67E+01 O.OOE+OO 2.67E+01 Be-7 <1.37E+02 O.OOE+OO 1.37E+02 K-40 3.85E+03 6.64E+02 2.73E+02 Ag-110M <1.92E+01 O.OOE+OO 1.92E+01 Sb-122 <8.55E+01 O.OOE+OO 8.55E+01 Sb-125 <4.13E+01 O.OOE+OO 4.13E+01 Sample ID: 407431 Sample Dates: 4/6/2016 -4/6/2016 BOTMFEEDER Nuclide Activity 2 Sigma Error MDA Mn-54 <1.39E+01 O.OOE+OO 1.39E+01 Co-58 <1.27E+01 O.OOE+OO 1.27E+01 Fe-59 <3.28E+01 O.OOE+OO 3.28E+01 Co-60 <2.00E+01 O.OOE+OO 2.00E+01 Zn-65 <3.84E+01 O.OOE+OO 3.84E+01 Nb-95 <1.55E+01 O.OOE+OO 1.55E+01 1-131 <1.51 E+01 O.OOE+OO 1.51 E+01 Cs-134 <1.82E+01 O.OOE+OO 1.82E+01 Cs-137 2.74E+01 1.43E+01 1.73E+01 Be-7 <1.20E+02 O.OOE+OO 1.20E+02 K-40 3.35E+03 5.55E+02 2.28E+02 Ag-110M <1.31 E+01 O.OOE+OO 1.31 E+01 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 58 of 91 Duke Energy Annual Report -Appendix E En.~ 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: FISH Concentration (Activity): pCi/kg wet Sample Point 063 ['INDICATOR - ESE@ 0.8 miles]

Sample ID: 407431 Sample Dates: 4/6/2016: 41612016 BOTMFEEDER Nuclide Activity 2 Sigma Error MDA Sb-122 <7.22E+01 O.OOE+OO 7.22E+01 Sb-125 <2.77E+01 O.OOE+OO 2.77E+01 Sample ID: 425295 Sample Dates: 10/1012016 -10110/2016 FREESWIM Nuclide Activity 2 Sigma Error MDA Mn-54 <3.29E+01 O.OOE+OO 3.29E+01 Co-58 <2.82E+01 O.OOE+OO 2.82E+01 Fe-59 <7.60E+01 O.OOE+OO 7.60E+01 Co-60 <3.15E+01 O.OOE+OO 3.15E+01 Zn-65 <4.36E+01 O.OOE+OO 4.36E+01 Nb-95 <3.24E+01 O.OOE+OO 3.24E+01 1-131 <3.25E+01 O.OOE+OO 3.25E+01 Cs-134 <3.43E+01 O.OOE+OO 3.43E+01 Cs-137 <4.10E+01 O.OOE+OO 4.10E+01 Be-7 <2.36E+02 O.OOE+OO 2.36E+02 K-40 4.64E+03 8.80E+02 9.24E+01 Ag-110M <2.85E+01 O.OOE+OO 2.85E+01 Sb-122 <7.68E+01 O.OOE+OO 7.68E+01 Sb-125 <8.13E+01 O.OOE+OO 8.13E+D1 Sample ID: 425296 Sample Dates: 10110/2016 -1011012016 BOTMFEEDER Nuclide Activity 2 Sigma Error MDA Mn-54 <4.00E+01 O.OOE+OO 4.00E+01 Co-58 <4.01E+01 O.OOE+OO 4.01E+01 Fe-59 <1.01E+02 O.OOE+OO 1.01E+02 Co-60 <4.50E+01 O.OOE+OO 4.50E+01 Zn-65 <1.02E+02 O.OOE+OO 1.02E+02 Nb-95 <4.29E+01 O.OOE+OO 4.29E+01 1-131 <3.86E+01 O.OOE+OO 3.86E+01 Cs-134 <3.46E+01 O.OOE+OO 3.46E+01 Cs-137 <5.60E+01 O.OOE+OO 5.60Et01 Be-7 <3.16E+02 O.OOE+OO 3.16E+02 K-40 4.16E+03 1.04E+03 7.49E+02 Ag-110M <5.59E+01 O.OOE+OO 5.59E+01 Sb-122 <8.68E+01 O.OOE+OO 8.68E+01 Sb-125 <1.04E+02 O.OOE+OO 1.04E+02 Sample Point 067 [ INDICATOR - SSE@ 4.34 miles]

Sample ID: 407432 Sample Dates: 4/5/2016 -4/5/2016 FREESWIM Nuclide Activity 2 Sigma Error MDA Mn-54 <1.41E+01 O.OOE+OO 1.41E+01 Co-58 <1.02E+01 O.OOE+OO 1.02E+01 Fe-59 <3.06E+01 O.OOE+OO 3.06E+.01 Co-60 <1.83E+01 O.OOE+OO 1.83E+01 Zn-65 <3.80E+01 O.OOE+OO 3.80E+01 Nb-95 <1.68E+01 O.OOE+OO 1.68E+01 1-131 <1.78E+01 O.OOE+OO 1.78E+01 Cs-134 <1.69E+01 O.OOE+OO 1.69E+01 Cs-137 1.18E+01 1.08E+01 1.63E+01 Be-7 <1.08E+02 O.OOE+OO 1.08E+02 K-40 3.88E+03 5.84E+02 4.13E+01 Ag-110M <1.32E+01 O.OOE+OO .1.32E+01 Sb-122 <7.34E+01 O.OOE+OO 7.34E+01 Sb-125 <3.62E+01 O.OOE+OO 3.62E+01 Sample ID: 407433 Sample Dates: 4/5/2016 -4/6/2016 BOTMFEEDER Nuclide Activity 2 Sigma Error MDA Mn-54 <1.22E+01 O.OOE+OO 1.22E+01 Co-58 <1.40E+01 O.OOE+OO 1.4DE+01 Fe-59 <3.55E+01 O.OOE+OO 3.55E+01 Co-60 <2.15E+01 O.OOE+OO 2.15E+01 Zn-65 <3.47E+01 O.OOE+OO 3.47E+01 Nb-95 <1.41E+01 O.OOE+OO 1.41 E+01 1-131 <1.87E+01 O.OOE+OO 1.87E+01 Cs-134 <1.79E+01 O.OOE+OO 1.79E+01 Cs-137 <1.90E+01 O.OOE+OO 1.90E+01 Be-7 <1.12E+02 O.OOE+OO 1.12E+02 K-40 2.74E+03 4.93E+02 2.45E+02 Ag-110M <1.18E+D1 O.OOE+OO 1.1 BE+01 Sb-122 <6.29E+01 O.OOE+OO 6.29E+01 Sb-125 <3.18E+01 O.OOE+OO 3.1BE+01 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 59 of 91 Duke Energy Annual Report -Appendix E EnJ) 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report- 2016 (Appendix E)

Media Type: FISH Concentration (Activity): pCi/kg wet Sample Point 067 [INDICATOR - SSE @ 4.34 mlles]

Sample ID: 425297

Sample Dates: 10/10/2016 -10/10/2016 FREESWIM Nuclide -Activity 2 Sigma Error MDA Mn-54 <2.29E+01 O.OOE+OO 2.29E+01 Co-58 <1.65E+01 O.OOE+OO 1.65E+01 Fe-59 <5.29E+01 O.OOE+OO 5.29E+01 Co-60 <2.39E+01 O.OOE+OO 2.39E+01 Zn-65 <5.47E+01 O.OOE+OO 5.47E+01 Nb-95 <2.73E+01 O.OOE+OO 2.73E+01 1-131 <2.21 E+01 O.OOE+OO 2.21E+01 Cs-134 <4.63E+OO O.OOE+OO 4.63E+OO Cs-137 <3.15E+01 . O.OOE+OO 3.15E+01 Be-7 <1.62E+02 O.OOE+OO 1.62E+02 K-40 3.84E+03 6.59E+02 6.02E+01 Ag-110M <1.98E+01 O.OOE+OO 1.98E+01 Sb-122 <3.60E+01 O.OOE+OO 3.60E+01 Sb-125 <5.73E+01 O.OOE+OO 5.73E+01 Sample ID: 425298 Sample Dates: 10/10/2016 -10/10/2016 BOTMFEEDER Nuclide Activity 2 Sigma Error MDA Mn-54 <2.08E+01 O.OOE+OO 2.08E+01 Co-58 <1.57E+01 O.OOE+OO 1.57E+01 Fe-59 <3.32E+01 O.OOE+OO 3.32E+01 Co-60 <1.28E+01 O.OOE+OO 1.28E+01 Zn-65 <3.65E+01 O.OOE+OO 3.65E+01 Nb-95 <1.86E+01 O.OOE+OO 1.86E+01 1-131 <1.50E+01 O.OOE+OO 1.50E+01 Cs-134 <1.89E+01 O.OOE+OO 1.89E+01 Cs-137 2.42E+01 1.40E+01 1.78E+01 Be-7 <9.96E+01 O.OOE+OO 9.96E+01 K-40 3.81 E+03 6.03E+02 4.74E+01 Ag-110M <1.63E+01 O.OOE+OO 1.63E+01 Sb-122 <2.81 E+01 O.OOE+OO 2.81 E+01 Sb-125 <5.08E+01 O.OOE+OO 5.08E+01 Media Type: MILK Concentration (Activity): pCi/I Sample Point 071 [ CONTROL - SSE @ 10.2 miles ]

Sample ID: 399299 Sample Dates: 1/11/2016 -1/11/2016 Nuclide Activity 2 Sigma Error MDA LLl-131 <5.50E-01 O.OOE+OO 5.50E-01 1-131 <5.86E+OO O.OOE+OO 5.86E+OO Cs-134 <6.37E+OO O.OOE+OO 6.37E+OO Cs-137 <8.51 E+OO O.OOE+OO 8.51E+OO Bala-140 <2.24E+OO O.OOE+OO 2.24E+OO Be-7 <5.44E+01 O.OOE+OO 5.44E+01 K-40 1.54E+03 2.48E+02 1.46E+02 Sample ID: 400402 Sample Dates: 1 /2512016 - 1 /2512016 Nuclide Activity 2 Sigma Error MDA LLl-131 <5.93E-01 O.OOE+OO 5.93E-01 1-131 <7.82E+OO O.OOE+OO 7.82E+OO Cs-134 <6.66E+OO O.OOE+OO 6.66E+OO Cs-137 <6.91E+OO O.OOE+OO 6.91E+OO Bala-140 <6.34E+OO O.OOE+OO 6.34E+OO Be-7 <5.92E+01 O.OOE+OO 5.92E+01 K-40 1.62E+03 2.51E+02 8.97E+01 Sample ID: 401394 Sample Dates: 218/2016 - 2/8/2016 Nuclide Activity 2 Sigma Error MDA LLl-131 <6.32E-01 O.OOE+OO 6.32E-01 1-131 <5.15E+OO O.OOE+OO 5.15E+OO Cs-134 <8.30E+OO O.OOE+OO 8.30E+OO Cs-137 <7.71E+OO O.OOE+OO 7.71E+OO Bala-140 <2.17E+OO O.OOE+OO 2.17E+OO Be-7 <5.38E+01 O.OOE+OO 5.38E+01 K-40 1.44E+03 2.29E+02 9.99E+01 Sample ID: 402360 Sample Dates: 2122/2016 - 2/2212016 Nuclide Activity 2 Sigma Error MDA LLl-131 <6.24E-01 0.00E+OO 6.24E-01 1-131 <5.61E+OO O.OOE+OO 5.61E+OO Cs-134 <7.97E+OO O.OOE+OO 7.97E+OO Cs-137 <9.44E+OO O.OOE+OO 9.44E+OO Bala-140 <7.73E+OO O.OOE+OO 7.73E+OO Be-7 <4.70E+01 O.OOE+OO 4.70E+01 Report Generated @ 414/2017 13:40:53 EnRad Laboratories Appendix E - Page 60 of 91 Duke Energy Annual Report - Appendix E En=:> 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: MILK Concentration (Activity}: pCi/I Sample Point 071 [CONTROL* SSE@ 10':2 miles]

sample ID: 402360 Sample Dates: 2/22/2016 -2/22/2016 Nuclide Activity 2 Sigma Error MDA K-40 1.47E+03 2.45E+02 1.60E+02 Sample ID: 404579 Sample Dates: 3/7/2016 - 3/7/2016 Nuclide Activity 2 Sigma Error MDA LLl-131 <5.07E-01 O.OOE+OO 5.07E-01 1-131 <7.45E+OO O.OOE+OO 7.45E+OO Cs-134 <7.28E+OO O.OOE+OO 7.28E+OO Cs-137 <8.54E+OO O.OOE+OO 8.54E+OO Bala-140 <6.57E+OO O.OOE+OO 6.57E+OO Be-7 <4.95E+01 O.OOE+OO 4.95E+01 K-40 1.68E+03 2.56E-i-02 8.37E+01 Sample ID: 406073 Sample Dates: 3/21/2016 - 3/21/2016 Nuclide Activity 2 Sigma Error MDA LLl-131 <6.47E-01 O.OOE+OO 6.47E-01 1-131 <7.91E+OO O.OOE+OO 7.91E+OO Cs-134 <7.38E+OO O.OOE+OO 7.38E+OO Cs-137 <9.31E+OO O.OOE+OO 9.31E+OO Bala-140 <1.06E+01 O.OOE+OO 1.06E+01 Be-7 <5.83E+01 O.OOE+OO 5.83E+01 K-40 1.55E+03 2.40E+02 1.05E+02 Sample ID: 407610 Sample Dates: 4/4/2016 - 4/4/2016 Nuclide Activity 2 Sigma Error MDA LLl-131 <6.45E-01 O.OOE+OO 6.45E-01 1-131 <6.41E+OO 0.00E+OO 6.41 E+OO Cs-134 <9.05E+OO O.OOE+OO 9.05E+OO Cs-137 <7.20E+OO O.OOE+OO 7.20E+OO Bala-140 <2.34E+OO 0.00E+OO 2.34E+OO Be-7 <2.37E+01 O.OOE+OO 2.37E+01 K-40 1.39E+03 2.24E+02 7.93E+01

'Sample ID: 409~89 Sample Dates: 4/1 B/2016 - 4/1 B/2016 Nuclide Activity 2 Sigma Error MDA LLl-131 <6.19E-01 O.OOE+OO 6.19E-01 1-131 <6.15E+OO O.OOE+OO 6.15E+OO Cs-134 <5.44E+OO O.OOE+OO 5.44E+OO Cs-137 <5.57E+OO O.OOE+OO 5.57E+OO Bala-140 <8.70E+OO O.OOE+OO B.70E+OO Be-7 <4.57E+01 O.OOE+OO 4.57E+01 K-40 1.39E+03 2.34E+02 1.09E+02 Sample ID: 410999 Sample Dates: 5/2/2016 - 5/2/2016 Nuclide Activity 2 Sigma Error MDA LLl-131 <5.76E-01 O.OOE+OO 5.76E-01 1-131 <6.90E+OO O.OOE+OO 6.90E+OO Cs-134 <8.30E+OO O.OOE+OO 8.30E+OO Cs-137 <6.07E+OO O.OOE+OO 6.07E+OO Bala-140 <9.66E+OO O.OOE+OO 9.66E+OO Be-7 <4.64E+01 O.OOE+OO 4.64E+01 K-40 1.35E+03 2.22E+02 1.14E+02 Sample ID: 411800 Sample Dates: 5/16/2016 -5/16/2016 Nuclide Activity 2 Sigma Error MDA LLl-131 <6.21E-01 O.OOE+OO 6.21E-01 1-131 <7.05E+OO O.OOE+OO 7.05E+OO Cs-134 <6.52E+OO O.OOE+OO 6.52E+OO Cs-137 <5.76E+OO O.OOE+OO 5.76E+OO Bala-140 <6.38E+OO O.OOE+OO 6.38E+OO Be-7 <5.62E+01 O.OOE+OO 5.62E+01 K-40 1.47E+03 2.42E+02 1.50E+02 Sample ID: 412778 Sample Dates: 5/31/2016 - 5/31/2016 Nuclide Activity 2 Sigma Error MDA LLl-131 <6.34E-01 O.OOE+OO 6.34E-01 1-131 <6.97E+OO O.OOE+OO 6.97E+OO Cs-134 <9.14E+OO O.OOE+OO 9.14E+OO Cs-137 <6.54E+OO O.OOE+OO 6.54E+OO Bala-140 <5.99E+OO O.OOE+OO 5.99E+OO Be-7 <5.17E+01 O.OOE+OO 5.17E+01 K-40 1.39E+03 2.23E+02 7.83E+01 Sample ID: 413929 Sample Dates: 6/13/2016 - 6/13/2016 Nuclide Activity 2 Sigma Error MDA LLl-131 <5.55E-01 O.OOE+OO 5.55E-01 1-131 <5.56E+OO O.OOE+OO 5.56E+OO Cs-134 <6.88E+OO O.OOE+OO 6.B8E+OO Cs-137 <8.41E+OO O.OOE+OO 8.41E+OO

@ 4/4/2017 13:40:53 EnRad Laboratories Report Generated Appendix E - Page 61 of 91 Duke Energy Annual Report -Appendix E En9 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report- 2016 (Appendix E)

Media Type: MILK Concentration (Activity): pCi/I

.. Sample Point 071 [CONTROL - SSE@ 10.2 miles]

Sample ID: 41.3929 Sample Dates: 6/13/2016 - 6/13/2016 Nuclide Activity 2 Sigma Error MDA Bala-140 <7.56E+OO O.OOE+OO 7.56E+OO Be-7 <5.84E+01 O.OOE+OO 5.84E+01 K-40 1.55E+03 2.39E+02 9.12E+01 Sample ID: 415468 Sample Dates: 6/27/2016 - 6/27/2016 Nuclide Activity 2 Sigma Error MDA LLl-131 <6.30E-01 O.OOE+OO 6.30E-01 1-131 <5.13E+OO O.OOE+OO 5.13E+OO Cs-134 <7.40E+OO O.OOE+OO 7.40E+OO Cs-137 <8.41E+OO O.OOE+OO 8.41 E+OO Bala-140 <9.66E+OO O.OOE+OO 9.66E+OO Be-7 <5.82E+01 O.OOE+OO 5.82E+01 K-40 1.53E+03 2.39E+02 1.07E+02 Sample ID: 417058 Sample Dates: 7/11/2016 - 711112016 Nuclide Activity 2 Sigma Error MDA LLl-131 <6.31E-01 O.OOE+OO 6.31E-01 1-131 <7.83E+OO O.OOE+OO 7.83E+OO Cs-134 <7.38E+OO O.OOE+OO 7.38E+OO Cs-137 <6.52E+OO O.OOE+OO 6.52E+OO Bala-140 <7.48E+OO O.OOE+OO 7.48E+OO Be-7 <3.72E+01 O.OOE+OO 3.72E+01 K-40 1.56E+03 2.40E+02 9.64E+01 Sample ID: 417842 Sample Dates: 7/25/2016 - 7/25/2016 Nuclide Activity 2 Sigma Error MDA LLl-131 <6.06E-01 O.OOE+OO 6.06E-01 1-131 <5.14E+OO O.OOE+OO 5.14E+OO Cs-134 <8.74E+OO O.OOE+OO 8.74E+OO Cs-137 <7.73E+OO O.OOE+OO 7.73E+OO Bala-140 <2.18E+OO O.OOE+OO 2.18E+OO Be-7 1

<4.05E+01 O.OOE+OO 4.05E+01 K-40 1.61 E+03 2.44E+02 8.08E+01 Sample ID: 419036 Sample Dates: 8/B/2016 - 8/8/2016 Nuclide Activity 2 Sigma Error MDA LLl-131 <6.50E-01 O.OOE+OO 6.50E-01 1-131 <5.75E+OO O.OOE+OO 5.75E+OO Cs-134 <8.33E+OO O.OOE+OO 8.33E+OO Cs-137 <8.17E+OO O.OOE+OO 8.17E+OO Bala-140 <2.31E+OO O.OOE+OO 2.31E+OO Be-7 <5.43E+01 O.OOE+OO 5.43E+01 K-40 1.53E+03 2.42E+02 8.06E+01 Sample ID: 420063 Sample Dates: 8/22/2016 - 8/22/2016 Nuclide Activity 2 Sigma Error MDA LLl-131 <5.00E-01 O.OOE+OO 5.00E-01 1-131 <3.39E+OO O.OOE+OO 3.39E+OO Cs-134 <7.40E+OO O.OOE+OO 7.40E+OO Cs-137 <8.41E+OO O.OOE+OO 8.41E+OO Bala-140 <5.93E+OO O.OOE+OO 5.93E+OO Be-7 <5.61E+01 O.OOE+OO 5.61E+01 K-40 1.45E+03 2.25E+02 1.73E+01 Sample ID: 421479 Sample Dates: 9/6/2016 - 9/6/2016 Nuclide Activity 2 Sigma Error MDA LLl-131 <6.30E-01 O.OOE+OO 6.30E-01 1-131 <6.63E+OO O.OOE+OO 6.63E+OO Cs-134 <7.40E+OO O.OOE+OO 7.40E+OO Cs-137 <6.0BE+OO O.OOE+OO 6.0BE+OO Bala-140 <5.94E+OO O.OOE+OO 5.94E+OO Be-7 <6.22E+01 O.OOE+OO 6.22E+01 K-40 1.19E+03 2.07E+02 1.13E+02 Sample ID: 423354 Sample Dates: 9/19/2016 - 9/19/2016 Nuclide Activity 2 Sigma Error MDA LLl-131 <6.39E-01 O.OOE+OO 6.39E-01 1-131 <6.87E+OO O.OOE+OO 6.87E+OO Cs-134 <7.38E+OO O.OOE+OO 7.38E+OO Cs-137 <8.39E+OO O.OOE+OO 8.39E+OO Bala-140 <2.17E+OO O.OOE+OO 2.17E+OO Be-7 <5.38E+01 O.OOE+OO 5.38E+01 K-40 1.34E+03 2.25E+02 1.36E+02 Sample ID: 425494 Sample Dates: 10/3/2016 -10/3/2016 Nuclide Activity 2 Sigma Error MDA LLl-1'31 <6.04E-01 O.OOE+OO 6.04E-01 1-131 <6.70E+OO O.OOE+OO 6.70E+OO Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 62 of 91 Duke Energy Annual Report -Appendix E En=:> 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: MILK Concentration (Activity): pCi/I Sample Point 071 [CONTROL - SSE@ 10.2 miles]

Sample ID: 425494 Sample Dates: 10/3/2016 -10/3/2016' Nuclide Activity 2 Sigma Error MDA Cs-134 <6.86E+OO O.OOE+OO 6.86E+OO Cs-137 <6.52E+OO O.OOE+OO 6.52E+OO Bala-140 <2.19E+OO O.OOE+OO 2.19E+OO Be-7 <4.37E+01 O.OOE+OO 4.37E+01 K-40 1.53E+03 2.38E+02 1.05E+02 Sample ID: 426401 Sample Dates: 10/17/2016 -10/17/2016 Nuclide Activity 2 Sigma Error MDA LLl-131 <6.31E-01 O.OOE+OO 6.31 E-01 1-131 <5.86E+OO 0.00E+OO 5.86E+OO Cs-134 <5.63E+OD O.OOE+OO 5.63E+OD Cs-137 <6.07E+OO O.OOE+OO 6.07E+OO Bala-140 <2.19E+OO D.OOE+OO 2.19E+OO Be-7 <4.91 E+01 O.OOE+OO 4.91E+01 K-40 1.54E+03 2.39E+02 1.07E+02 Sample ID: 427753 Sample Dates: 10/31/2016 -10/31/2016 Nuclide Activity 2 Sigma Error MDA LLl-131 <5.71 E-01 D.OOE+OO 5.71 E-01 1-131 <7.30E+OO O.ODE+OO 7.3DE+OO Cs-134 <4.08E+OO O.OOE+OO 4.0BE+OO Cs-137 <6.43E+OO O.OOE+OO 6.43E+OO Bala-140 <9.26E+OO O.OOE+OO 9.26E+OO Be-7 <4.90E+01 O.OOE+OO 4.90E+01 K-40 1.57E+03 2.48E+02 1.06E+02 Sample ID: 428929 Sample Dates: 11/14/2016 -11/14/2016 Nuclide Activity 2 Sigma Error MDA LLl-131 <6.41 E-01 O.OOE+OO 6.41 E-01 1-131 <7.58E+OO O.ODE+OO 7.58E+OO Cs-134 <7.12E+OO O.OOE+OO 7.12E+OO Cs-1,_37 <7.99E+OO O.OOE+OO 7.99E+OO Bala-140 <8.03E+OO O.OOE+OO 8.03E+OO Be-7 <5.85E+01 O.OOE+OO 5.85E+01 K-40 1.48E+03 2.32E+02 7.85E+01 Sample ID: 429991 Sample Dates: 11/28/2016 -11/28/2016 Nuclide Activity 2 Sigma Error MDA LLl-131 <6.03E-01 O.OOE+OO 6.03E-01 1-131 <5.37E+OO O.OOE+OO 5.37E+OO Cs-134 <9.04E+OO O.OOE+OO 9.04E+OO Cs-137 <6.76E+OO O.OOE+OO 6.76E+OO Bala-140 <7.75E+OO O.ODE+OO 7.75E+DO Be-7 <4.19E+01 O.OOE+OO 4.19E+01 K-40 1.49E+03 2.38E+02 1.12E+02 Sample ID: 431099 Sample Dates: 12/12/2016 - 12112/2016 Nuclide Activity 2 Sigma Error MDA LLl-131 <5.28E-01 O.OOE+OO 5.2BE-01 1-131 <6.14E+bo O.OOE+OO 6.14E+OO Cs-134 <6.30E+OO O.OOE+OO 6.30E+OO Cs-137 <5.57E+OO O.OOE+OO 5.57E+OO Bala-140 <7.53E+OO

O.OOE+OO 7.53E+OO Be-7 <5.16E+01 O.OOE+OO 5.16E+01 K-40 1.63E+03 2.46E+02 8.47E+01 Sample ID: 431851 Sample Dates: 12/27/2016 -12/27/2016 Nuclide Activity 2 Sigma Error MDA LLl-131 <5.47E-01 O.OOE+OO 5.47E-01 1-131 <6.92E+OO O.OOE+OO 6.92E+OO Cs-134 <7.40E+OO O.OOE+OO 7.40E+OO Cs-137 <7.73E+OO O.OOE+OO 7.73E+OO Bala-140 <1.06E+01 O.OOE+OO 1.06E+01 Be-7 * <4.91E+01 O.OOE+OO 4.91E+01 K-40 1.40E+03 2.29E+02 1.15E+02 Media Type: SEDIMENT_SHORE Concentration (Activity): pCi/kg Sample Point 063 [ INDICATOR - ESE@ 0.8 miles]

Sample ID: 406122 Sample Dates: 3/21/2016 - 3/21/2016 Nuclide Activity 2 Sigma Error MDA Mn-54 <4.52E+01 O.OOE+OO 4.52E+01 Co-58 <3.78E+01 O.OOE+OO 3.78E+01 Fe-59 <8.95E+01 O.OOE+OO 8.95E+01 Co-60 <3.86E+01 O.OOE+OO 3.86E+01 Zn-65 <8.63E+01 O.OOE+OO 8.63E+01 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 63 of 91 Duke Energy Annual Report -Appendix E

En-~ 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report- 2016 (Appendix E)

Media Type: SEDIMENT_SHORE Concentration (Activity): pCi/kg Sample Point 063 [INDICATOR - ESE @ 0.8 miles]

Sample ID: 406122 Sample Dates: 3/21 /2016 - 3/2112016 Nuclide Activity 2 Sigma Error MDA Zr-95 <9.B7E+01 O.OOE+OO 9.87E+01 Nb-95 <5.61E+01 O.OOE+OO 5.61E+01 1-131 <1.11 E+02 O.OOE+OO 1.11E+02 Cs-134 <5.83E+01 O.OOE+OO 5.83E+01 Cs-137 <4.08E+01 O.OOE+OO 4.08E+01 Be-7 <3.08E+02 O.OOE+OO 3.08E+02 K-40 2.29E+04 2.16E+03 4.98E+02 Co-57 <3.62E+01 O.OOE+OO 3.62E+01 Mo-99 <1.17E+04 0.00E+OO 1.17E+04 Ag-110M <3.61 E+01 O.OOE+OO 3.61E+01 Sb-122 <1.93E+03 O.OOE+OO 1.93E+03 Sb-125 <9.82E+01 O.OOE+OO 9.82E+01 Sample ID: 421851 Sample Dates: 9/19/2016 -9/19/2016 Nuclide Activity 2 Sigma Error MDA Mn-54 <3.37E+01 O.OOE+OO 3.37E+01 Co-58 <2.55E+01 O.OOE+OO 2.55E+01 Fe-59 <7.67E+01 O.OOE+OO 7.67E+01 Co-60 <3.28E+01 O.OOE+OO 3.28E+01 Zn-65 <8.03E+01 O.OOE+OO 8.03E+01 Zr-95 <5.28E+01 O.OOE+OO 5.28E+01 Nb-95 <2.5BE+01 O.OOE+OO 2.58E+01 1-131 <2.71E+01 O.OOE+OO 2.71E+01 Cs-134 <4.00E+01 O.OOE+OO 4.00E+01 Cs-137 <3.34E+01 O.OOE+OO 3.34E+01 Be-7 <1.86E+02 O.OOE+OO 1.86E+02 K-40 2.57E+04 2.60E+03 2.06E+02 Co-57 <2.14E+01 O.OOE+OO 2.14E+01 Mo-99 <5.66E+02 O.OOE+OO 5.66E+02 Ag-110M <2.49E'+01 O.OOE+o'o *2.49E+01 Sb-122 <5.81E+01 O.OOE+OO 5.81E+01 Sb-125 <7.25E+01 O.OOE+OO 7.25E+01 Sample Point 067 [INDICATOR - SSE@ 4.34 miles]

Sample ID: 406123 Sample Dates: 3/2112016 - 3/2112016 Nuclide Activity 2 Sigma Error MDA Mn-54 <3.24E+01 O.OOE+OO 3.24E+01 Co-58 <2.45E+01 O.OOE+OO 2.45E+01 Fe-59 <5.50E+01 O.OOE+OO 5.50E+01 Co-60 <2.73E+01 O.OOE+OO 2.73E+01 Zn-65 <5.70E+01 0.00E+OO 5.70E+01 Zr-95 <5.69E+01 O.OOE+OO 5.69E+01 Nb-95 <3.13E+01 O.OOE+OO 3.13E+01 1-131 <7.31E+01 O.OOE+OO 7.31E+01 Cs-134 <3.03E+01 O.OOE+OO 3.03E+01 Cs-137 1.89E+01 2.38E+01 3.90E+01 Be-7 2.38E+02 1.95E+02 3.10E+02 K-40 1.36E+04 1.40E+03 4.64E+02 Co-57 <1.93E+01 O.OOE+OO 1.93E+01 Mo-99 <7.71E+03 O.OOE+OO 7.71E+03 Ag-110M <2.41 E+01 o:ooE+oo 2.41E+01 Sb-122 <9.99E+02 O.OOE+OO 9.99E+02 Sb-125 <5.83E+01 O.OOE+OO 5.83E+01 Sample ID: 421852 Sample Dates: 9/19/2016 - 9/19/2016 Nuclide Activity 2 Sigma Error MDA Mn-54 <3.17E+01 O.OOE+OO 3.17E+01 Co-58 <2.82E+01 O.OOE+OO 2.B2E+01 Fe-59 <5.23E+01 O.OOE+OO 5.23E+01 Co-60 <3.04E+01 O.OOE+OO 3.04E+01 Zn-65 <5.46E+01 O.OOE+OO 5.46E+01 Zr-95 <5.66E+01 O.OOE+OO 5.66E+01 Nb-95 <2.59E+01 O.OOE+OO 2.59E+01 1-131 <3.54E+01 O.OOE+OO 3.54E+01 Cs-134 <4.53E+01 O.OOE+OO 4.53E+01 Cs-137 2.54E+02 5.00E+01 5.10E+01 Be-7 1.77E+02 1.89E+02 3.08E+02 K-40 1.24E+04 1.32E+03 2.72E+02 Co-57 <2.58E+01 O.QOE+OO 2.58E+01 Mo-99 <4.30E+02 O.OOE+OO 4.30E+02 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 64 of 91 Duke Energy Annual Report -Appendix E

En~ 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: SEDIMENT_SHORE Concentration (Activity): pCi/kg Sample Point 067 [INDICATOR - SSE@ 4.34 miles]

Sample ID: "421852 Sample Dates: 9/19/2016 - 9/19/2016 Nuclide Activity 2 Sigma Error MDA Ag-110M <2.71E+01 O.OOE+OO 2.71E+01 Sb-122 <8.39E+01 O.OOE+OO 8.39E+01 Sb-125 <7.56E+01 O.OOE+OO 7.56E+01 Sample Point 068 [CONTROL -W@ 1.82 miles]

Sample ID: 406124 Sample Dates: 3/21/2016 - 3/21/2016 Nuclide Activity 2 Sigma Error MDA Mn-54 <2.68E+01 O.OOE+OO 2.68E+01 Co-58 <2.41 E+01 O.OOE+OO 2.41E+01 Fe-59 <4.70E+01 0.00E+OO 4.70E+01 Co-60 <2.20E+01 O.OOE+OO 2.20E+01 Zn-65 <5.64E+01 0.00E+OO 5.64E+01 Zr-95 <5.66E+01 O.OOE+OO 5.66E+01 Nb-95 <3.44E+01 O.OOE+OO 3.44E+01 1-131 <5.97E+01 O.OOE+OO 5.97E+01 Cs-134 <3.87E+01 O.OOE+OO 3.87E+01 Cs-137 <2.90E+01 O.OOE+OO 2.90E+01 Be-7 <2.45E+02 O.OOE+OO 2.45E+02 K-40 5.83E+03 7.99E+02 4.02E+02 Co-57 <1.83E+01 O.OOE+OO 1.83E+01 Mo-99 <7.67E+03 O.OOE+OO 7.67E+03 Ag-110M <2.13E+01 O.OOE+OO 2.13E+01 Sb-122 <1.42E+03 O.OOE+OO 1.42E+03 Sb-125 <5.66E+01 O.OOE+OO 5.66E+01 Sample ID: 421853 Sample Dates: 9/19/2016 - 9/19/2016 Nuclide Activity 2 Sigma Error MDA Mn-54 <1.97E+01 O.OOE+OO 1.97E+01 Co-58 <1.52E+01 O.OOE+OO 1.52E+01 Fe-59 <3.83E+01 o.poE+OO 3.83E+01 Co-60 <1.74E+01 O.OOE+OO 1.74E+01 Zn-65 <3.96E+01 O.OOE+OO 3.96E+01 Zr-95 <3.06E+01 O.OOE+OO 3.06E+01 Nb-95 <1.59E+01 O.OOE+OO 1.59E+01 1-131 <1.92E+01 O.OOE+OO 1.92E+01 Cs-134 <2.61E+01 O.OOE+OO 2.61E+01 Cs-137 <1.41E+01 O.OOE+OO 1.41E+01 Be-7 <1.15E+02 O.OOE+OO 1.15E+02 K-40 6.74E+03 7.B2E+02 1.42E+02 Co-57 <1.48E+01 O.OOE+OO 1.4BE+01 Mo-99 <2.37E+02 O.OOE+OO 2.37E+02 Ag-110M <1.63E+01 O.OOE+OO 1.63E+01 Sb-122 <3.34E+01 O.OOE+OO 3.34E+01 Sb-125 <4.00E+01 O.OOE+OO 4.00E+01 Media Type: SURFACE WATER Concentration (Activity): pCi/I Sample Point 062 [CONTROL - ENE@ 0.85 miles]

Sample ID: 398996 Sample Dates: 12/7/2015 - 1 /5/2016 Nuclide Activity 2 Sigma Error MDA Mn-54 <2.92E+OO O.OOE+OO 2.92E+OO Co-58 <3.26E+OO O.OOE+OO 3.26E+OO Fe-59 <6.67E+OO O.OOE+OO 6.67E+OO Co-60 <2.83E+OO O.OOE+OO 2.83E+OO Zn-65 <4.44E+OO O.OOE+OO 4.44E+OO Zr-95 <5.98E+OO O.OOE+OO 5.98E+OO Nb-95 <3.69E+OO O.OOE+OO 3.69E+OO 1-131 <1.18E+01 O.OOE+OO 1.18E+01 Cs-134 <3.13E+OO O.OOE+OO 3.13E+OO Cs-137 <2.42E+OO O.OOE+OO 2.42E+OO Bala-140 <9.58E+OO O.OOE+OO 9.58E+OO Be-7 <2.58E+01 O.OOE+OO 2.58E+01 K-40 5.98E+01 2.60E+01 2.75E+01 Sample ID: 401044 Sample Dates: 1/5/2016 - 2/1/2016 Nuclide Activity 2 Sigma Error MDA Mn-54 <3.50E+OO O.OOE+OO 3.50E+OO Co-58 <4.44E+OO O.OOE+OO 4.44E+OO Fe-59 <1.06E+01 O.OOE+OO 1.06E+01 Co-60 <3.33E+OO O.OOE+OO 3.33E+OO in-65 <6.12E+OO O.OOE+OO 6.12E+OO Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 65 of 91 Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report- 2016 (Appendix E)

Media Type: SURFACE WATER Concentration (Activity): pCi/I Sample Point 062 [ CONTR0L - ENE @ 0.85 miles]

Sample ID: 401044 Sample Dates: 1/5/2016 - 2/1/2016 Nuclide Activity 2 Sigma Error MDA Zr-95 <8.74E+OO O.OOE+OO 8.74E+OO Nb-95 <5.25E+OO O.OOE+OO 5.25E+OO 1-131 <1.16E+01 O.OOE+OO 1.16E+01 Cs-134 <3.19E+OO O.OOE+OO 3.19E+OO Cs-137 <4.32E+OO O.OOE+OO 4.32E+OO Bala-140 <1.17E+01 O.OOE+OO 1.17E+01 Be-7 <1.93E+01 O.OOE+OO 1.93E+01 K-40 <5.64E+01 O.OOE+OO 5.64E+01 Sample ID: 403084 Sample Dates: 2/1/2016 - 212912016 Nuclide Activity 2 Sigma Error MDA Mn-54 <3.67E+OO O.OOE+OO 3.67E+OO Co-58 <3.92E+OO O.OOE+OO 3.92E+OO Fe-59 <8.53E+OO O.OOE+OO 8.53E+OO Co-60 <3.56E+OO O.OOE+OO 3.56E+OO Zn-65 <6.56E+OO O.OOE+OO 6.56E+OO Zr-95 <5.62E+OO O.OOE+OO 5.62E+OO Nb-95 <4.01E+OO O.OOE+OO 4.01E+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 <3.10E+OO O.OOE+OO 3.10E+OO Bala-140 <8.21 E+OO O.OOE+OO 8.21E+OO Be-7 <3.45E+01 O.OOE+OO 3.45E+01 K-40 <4.70E+01 O.OOE+OO 4.70E+01 Sample ID: 403615 Sample Dates: 12/7/2015 - 2/2912016 Nuclide Activity 2 Sigma Error MDA H3SW <-6.7E+01 O.OOE+OO 1.96E+02 Sample ID: 406432 Sample Dates: 2129/2016 - 3/28/2016 Nuclide Activity 2 Sigma Error MDA Mn-54 <1.80E+OO O.OOE+OO 1.80E+OO Co-58 <1.74E+OO O.OOE+OO 1.74E+OO Fe-59 <4.18E+OO O.OOE+OO 4.18E+OO Co-60 <1.50E+OO O.OOE+OO 1.50E+OO Zn-65 <3.48E+OO O.OOE+OO 3.48E+OO Zr-95 <3.79E+OO O.OOE+OO 3.79E+OO Nb-95 <2.59E+OO O.OOE+OO 2.59E+OO 1-131 <1.16E+01 O.OOE+OO 1.16E+01 Cs-134 <1.76E+OO O.OOE+OO 1.76E+OO Cs-137 <1.74E+OO O.OOE+OO 1.74E+OO Bala-140 <4.89E+OO O.OOE+OO 4.89E+OO Be-7 <1.70E+01 O.OOE+OO 1.70E+01 K-40 6.53E+01 1.98E+01 2.35E+01 Sample ID: 409821 Sample Dates: 312812016 - 4/2512016 Nuclide Activity 2 Sigma Error MDA Mn-54 <2.86E+OO O.OOE+OO 2.86E+OO Co-58 <3.53E+OO O.OOE+OO 3.53E+OO Fe-59 <7.58E+OO O.OOE+OO 7.58E+OO Co-60 <3.81E+OO O.OOE+OO 3.81E+OO Zn-65 <6.61E+OO O.OOE+OO 6.61E+OO Zr-95 <5.95E+OO O.OOE+OO 5.95E+OO Nb-95 <3.78E+OO 0.00E+OO 3.78E+OO 1-131 <1.14E+01 O.OOE+OO 1.14E+01 Cs-134 <4.11 E+OO O.OOE+OO 4.11E+OO Cs-137 <3.33E+OO O.OOE+OO 3.33E+OO Bala-140 <1.13E+01 O.OOE+OO 1.13E+01 Be-7 <2.79E+01 0.00E+OO 2.79E+01 K-40 3.21E+01 3.74E+01 6.06E+01 Sample ID: 412260 Sample Dates: 4125/2016 - 5/2312016 Nuclide Activity 2 Sigma Error MDA Mn-54 <2.82E+OO O.OOE+OO 2.82E+OO Co-58 <2.59E+OO O.OOE+OO 2.59E+OO Fe-59 <7.87E+OO O.OOE+OO 7.87E+OO Co-60 <2.87E+OO O.OOE+OO 2.87E+OO Zn-65 <5.76E+OO O.OOE+OO 5.76E+OO Zr-95 <4.95E+OO O.OOE+OO 4.95E+OO Nb-95 <4.19E+OO O.OOE+OO 4.19E+OO 1-131 <1.19E+01 O.OOE+OO 1.19E+01 Cs-134 <2.78E+OO O.OOE+OO 2.78E+OO Cs-137 <3.47E+OO O.OOE+OO 3.47E+DO Bala-140 <1.06E+01 O.OOE+OO 1.06E+01 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 66 of 91 Duke Energy Annual Report - Appendix E

En=:> 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Env.ironmerital Monitoring Analysis Report - 2016 (Appendix.E)

Media Type: SURFACE WATER Concentration (Activity): pCi/I Sample Point 062 [CONTROL - ENE@ 0.85 miles]

Sample ID: 412260 Sample Dates: 4125/2016 - 5/2312016 Nuclide Activity 2 Sigma Error MDA Be-7 <3.86E+01 O.OOE+OO 3.86E+01 K-40 <5.32E+01 O.OOE+OO 5.32E+01 Sample ID: 413189 Sample Dates: 2/29/2016 - 5/23/2016 Nuclide Activity 2 Sigma Error MDA H3SW <-4.7E+01 O.OOE+OO 1.95E+02 Sample ID: 415067 Sample Dates: 5/23/2016 - 6/20/2016 Nuclide Activity 2 Sigma Error MDA Mn-54 <2.45E+OO O.OOE+OO 2.45E+OO Co-58 <2.81E+OO O.OOE+OO 2.81E+OO Fe-59 <6.29E+OO O.OOE+OO 6.29E+OO Co-60 <2.72E+OO O.OOE+OO 2.72E+OO znc65 <6.04E+OO O.OOE+OO 6.04E+OO Zr-95 <5.26E+OO O.OOE+OO 5.26E+OO Nb-95 <2.97E+OO O.OOE+OO 2.97E+OO 1-131 <1.05E+01 O.OOE+OO 1.05E+01 Cs-134 <3.25E+OO O.OOE+OO 3.25E+OO Cs-137 <3.01E+OO O.OOE+OO 3.01 E+OO Bala-140 <6.41 E+OO O.OOE+OO 6.41E+OO Be-7 <2.60E+01 O.OOE+OO 2.60E+01 K-40 1.99E+01 2.55E+01 4.19E+Q1 Sample ID: 417449 Sample Dates: 6/20/2016 - 7/18/2016 Nuclide Activity 2 Sigma Error MDA Mn-54 <4.99E+OO O.OOE+OO 4.99E+OO Co-58 <4.67E+OO O.OOE+OO 4.67E+OO Fe-59 <8.43E+OO O.OOE+OO 8.43E+OO Co-60 <4.27E+OO 0.00E+OO 4.27E+OO Zn-65 <7.86E+OO O.OOE+OO 7.86E+OO Zr-95 <6.85E+OO O.OOE+OO 6.85E+OO Nb-95 <5.77E+OO O.OOE+OO 5.77E+OO 1-131 <1.20E+01 O.OOE+OO 1.20E+01 Cs-134 <3.17E+OO O.OOE+OO 3.17E+OO Cs-137 <4.0BE+OO O.OOE+OO 4.08E+OO Bala-140 <1.06E+01 O.OOE+OO 1.06E+01 Be-7 <3.11E+01 O.OOE+OO 3.11E+01 K-40 <6.39E+01 O.OOE+OO 6.39E+01 Sample ID: 419534 Sample Dates: 7/18/2016 - 8/15/2016 Nuclide Activity 2 Sigma Error MDA Mn-54 <3.14E+OO O.OOE+OO 3.14E+OO Co-58 <4.00E+OO O.OOE+OO 4.00E+OO Fe-59 <6.83E+OO O.OOE+OO 6.83E+OO Co-60 <3.46E+OO O.OOE+OO 3.46E+OO Zn-65 <9.39E+OO O.OOE+OO 9.39E+OO Zr-95 <6.66E+OO 0.00E+OO 6.66E+OO Nb-95 <4.98E+OO O.OOE+OO 4.98E+OO 1-131 <1.17E+01 O.OOE+OO 1.17E+01 Cs-134 <4.43E+OO O.OOE+OO 4.43E+OO Cs-137 <4.95E+OO O.OOE+OO 4.95E+OO Bala-140 <9.62E+OO O.OOE+OO 9.62E+OO Be-7 <3.99E+01 O.OOE+OO 3.99E+01 K-40 <5.06E+01 O.OOE+OO 5.06E+01 Sample ID: 420870 Sample Dates: 5/23/2016 - 8/15/2016 Nuclide Activity 2 Sigma Error MDA H3SW <-9.5E+01 O.OOE+OO 1.97E+02 Sample ID: 422611 Sample Dates: 8/15/2016 - 9/12/2016 Nuclide Activity 2 Sigma Error MDA Mn-54 <1.30E+OO O.OOE+OO 1.30E+OO Co-58 <1.70E+OO O.OOE+OO 1.70E+OO Fe-59 <3.85E+OO O.OOE+OO 3.85E+OO Co-60 <1.50E+OO O.OOE+OO 1.50E+OO Zn-65 <2.86E+OO O.OOE+OO 2.86E+OO Zr-95 <3.00E+OO O.OOE+OO 3.00E+OO Nb-95 <2.29E+OO O.OOE+OO 2.29E+OO 1-131 <1.01E+01 O.OOE+OO 1.01E+01 Cs-134 <1.87E+OO O.OOE+OO 1.87E+OO Cs-137 <1.68E+OO O.OOE+OO 1.68E+OO Bala-140 <5.52E+OO O.OOE+OO 5.52E+OO Be-7 <1.44E+01 O.OOE+OO 1.44E+01 K-40 5.15.E+01 1.66E+01 2.02E+01 EnRad Laboratories Report Generated @ 4/4/2017 13:40:53 Appendix E - Page 67 of 91 Duke Energy Annual Report -Appendix E

En:=> 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: SURFACE WATER Concentration (Activity): pCi/I Sample Point 062 [CONTROL - ENE@*0.85 miles]

Sample ID: 426032 Sample Dates: 9/12/2016 - 10/10/2016 Nuclide Activity 2 Sigma Error MDA Mn-54 <3.80E+OO O.OOE+OO 3.80E+OO Co-58 <5.05E+OO O.OOE+OO 5.05E+OO Fe-59 <8.44E+OO O.OOE+OO 8.44E+OO Co-60 <3.86E+OO O.OOE+OO 3.86E+OO Zn-65 <7.12E+OO O.OOE+OO 7.12E+OO Zr-95 <6.24E+OO O.OOE+OO 6.24E+OO Nb-95 <4.82E+OO O.OOE+OO 4.82E+OO 1-131 <1.12E+01 O.OOE+OO 1.12E+01 Cs-134 <3.99E+OO O.OOE+OO 3.99E+OO Cs-137 <3.67E+OO O.OOE+OO 3.67E+OO Bala-140 <8.71E+OO O.OOE+OO 8.71E+OO Be-7 <3.01E+01 O.OOE+OO 3.01E+01 K-40 <6.40E+01 0.00E+OO 6.40E+01 Sample ID: 428257 Sample Dates: 10/10/2016 -11/712016 Nuclide Activity 2 Sigma Error MDA Mn-54 <2.45E+OO O.OOE+OO 2.45E+OO Co-58 <2.74E+OO O.OOE+OO 2.74E+OO Fe-59 <7.96E+OO O.OOE+OO 7.96E+OO I Co-60 <3.02E+OO O.OOE+OO 3.02E+OO Zn-65 <6.53E+OO O.OOE+OO 6.53E+OO Zr-95 <6.47E+OO O.OOE+OO 6.47E+OO Nb-95 <4.77E+OO O.OOE+OO 4.77E+OO 1-131 <1.19E+01 O.OOE+OO 1.19E+01 Cs-134 <3.11E+OO O.OOE+OO 3.11E+OO Cs-137 <3.15E+OO O.OOE+OO 3.15E+OO Bala-140 <7.83E+OO O.OOE+OO 7.83E+OO Be-7 <3.40E+01 O.OOE+OO 3.40E+01 K-40 <5.00E+01 O.OOE+OO 5.00E+01 Sample ID: 427849 Sample Dates: 8/15/2016 - 1215/2016 Nuclide Activity 2 Sigma Error MDA H3SW <-9.9E+OO O.OOE+OO 1.89E+02 Sample ID: 430621 Sample Dates: 11/7/2016 -12/5/2016 Nuclide Activity 2 Sigma Error MDA Mn-54 <4.73E+OO O.OOE+OO 4.73E+OO Co-58 <3.24E+OO O.OOE+OO 3.24E+OO Fe-59 <1.02E+01 O.OOE+OO 1.02E+01 Co-60 <4.58E+OO O.OOE+OO 4.58E+OO Zn-65 <9.98E+OO O.OOE+OO 9.9BE+OO Zr-95 <6.75E+OO O.OOE+OO 6.75E+OO Nb-95 <5.92E+OO O.OOE+OO 5.92E+OO 1-131 <1.10E+01 O.OOE+OO 1.10E+01 Cs-134 <4.04E+OO O.OOE+OO 4.04E+OO Cs-137 <3.92E+OO 0.00E+OO 3.92E+OO Bala-140 <1.19E+01 O.OOE+OO 1.19E+01 Be-7 <3.30E+01 O.OOE+OO 3.30E+01 K-40 <7.39E+01 O.OOE+OO 7.39E+01 Sample Point 063:1 [INDICATOR - E @0.79 miles]

Sample ID: 398997 Sample Dates: 1217/2015 -1/5/2016 Nuclide Activity 2 Sigma Error MDA Mn-54 <2.77E+OO O.OOE+OO 2.77E+OO Co-58 <2.97E+OO O.OOE+OO 2.97E+OO Fe-59 <5.83E+OO O.OOE+OO 5.83E+OO Co-60 <2.64E+OO O.OOE+OO 2.64E+OO Zn-65 <4.46E+OO O.OOE+OO 4.46E+OO Zr-95 <5.96E+OO O.OOE+OO 5.96E+OO Nb-95 <3.62E+OO O.OOE+OO 3.62E+OO 1-131 <1.00E+01 O.OOE+OO 1.00E+01 Cs-134 <2.26E+OO O.OOE+OO 2.26E+OO Cs-137 <3.17E+OO O.OOE+OO 3.17E+OO Bala-140 <7.00E+OO O.OOE+OO 7.00E+OO Be-7 <2.32E+D1 O.OOE+OO 2.32E+01 K-40 4.50E+01 3.34E+D1 5.17E+01 Sample ID: 401045 Sample Dates: 1/5/2016- 2/1/2016 Nuclide Activity 2 Sigma Error MDA Mn-54 <2.81E+OO O.OOE+OO 2.81E+OO Co-58 <3.45E+OO O.OOE+OO 3.45E+OO Fe-59 <7.81E+OO O.OOE+OO 7.81E+OO Co-60 <4.18E+OO O.OOE+OO 4.1BE+OO EnRad Laboratories Report Generated @ 4/4/2017 13:40:53 Appendix E - Page 68 of 91 Duke Energy Annual Report -Appendix E En~ 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: SURFACE WATER Concentration (Activity): pCi/I Sample Point 063.1 [INDICATOR - E @0.79 miles]*

Sample ID: 401045 Sample Dates: 1/5/2016 - 2/1/2016 Nuclide Activity 2 Sigma Error MDA Zn-65 <6.50E+OO 0.00E+OO 6.50E+OO Zr-95 <7.39E+OO O.OOE+OO 7.39E+OO Nb-95 <4.36E+OO O.OOE+OO 4.36E+OO 1-131 <1.18E+01 O.OOE+OO 1.18E+01 Cs-134 <2.93E+OO O.OOE+OO 2.93E+OO Cs-137 <3.02E+OO O.OOE+OO 3.02E+OO Bala-140 <6.34E+OO 0.00E+OO 6.34E+OO Be-7 <3.64E+01 O.OOE+OO 3.64E+01 K-40 <5.84E+01 O.OOE+OO *5.84E+01 Sample ID: 403085 Sample Dates: 2/1 /2016 - 2/29/2016 Nuclide Activity 2 Sigma Error MDA Mn-54 <2.57E+OO O.OOE+OO 2.57E+OO Co-58 <2.58E+OO O.OOE+OO 2.58E+OO Fe-59 <6.12E+OO O.OOE+OO 6.12E+OO Co-60 <2.23E+OO O.OOE+OO 2.23E+OO Zn-65 <5.68E+OO O.OOE+OO 5.68E+OO Zr-95 <4.58E+OO O.OOE+OO 4.58E+OO Nb-95 <3.22E+OO O.OOE+OO 3.22E+OO 1-131 <1.20E+01 O.OOE+OO 1.20E+01 Cs-134 <2.13E+OO O.OOE+OO 2.13E+OO Cs-137 <2.50E+OO O.OOE+OO 2.50E+OO Bala-140 <6.73E+OO O.OOE+OO 6.73E+OO Be-7 <3.00E+01 O.OOE+OO 3.00E+01 K-40 4.50E+01 2.37E+01 3.05E+01 Sample ID: 403616 Sample Dates: 12/7/2015 - 2/29/2016 Nuclide Activity 2 Sigma Error MDA H3SW 4.41E+03 2.01E+02 1.95E+02 Sample ID: 406433 Sample Dates: 2/29/2016 - 3/28/2016 Nuclid!! Activity 2 Sigma Error MDA

' Mn-54* <1.74E+OO O.OOE+OO 1.74E+OO Co-58 <1.94E+OO 0.00E+OO 1.94E+OO Fe-59 <4.54E+OO O.OOE+OO 4.54E+OO Co-60 <1.56E+OO O.OOE+OO 1.56E+OO Zn-65 <3.85E+OO O.OOE+OO 3.85E+OO Zr-95 <3.04E+OO O.OOE+OO 3.04E+OO Nb-95 <2.82E+OO O.OOE+OO 2.82E+OO 1-131 <1.20E+01 O.OOE+OO 1.20E+01 Cs-134 <1.73E+OO O.OOE+OO 1.73E+OO Cs-137 <1.SOE+OO O.OOE+OO 1.SOE+OO Bala-140 <5.87E+OO O.OOE+OO 5.87E+OO Be-7 <1.71E+01 O.OOE+OO 1.71 E+01 K-40 4.06E+01 2.05E+01 3.00E+01 Sample ID: 409822 Sample Dates: 3/28/2016 - 4/25/2016 Nuclide Activity 2 Sigma Error MDA Mn-54 <2.58E+OO O.OOE+OO 2.58E+OO Co-58 <2.98E+OO O.OOE+OO 2.98E+OO Fe-59 <4.24E+OO O.OOE+OO 4.24E+OO Co-60 <2.60E+OO O.OOE+OO 2.60E+OO Zn-65 <6.37E+OO O.OOE+OO 6.37E+OO Zr-95 <5.29E+OO O.OOE+OO 5.29E+OO Nb-95 <3.49E+OO O.OOE+OO 3.49E+OO 1-131 <1.1 OE+01 O.OOE+OO 1.1 OE+01 Cs-134 <3.94E+OO O.OOE+OO 3.94E+OO Cs-137 <2.27E+OO O.OOE+OO 2.27E+OO Bala-140 <7.32E+OO O.OOE+OO 7.32E+OO Be-7 <3.32E+01 O.OOE+OO 3.32E+01 K-40 3.93E+01 2.35E+01 3.04E+01 Sample ID: 412261 Sample Dates: 4/25/2016 - 5/23/2016 Nuclide Activity 2 Sigma Error MDA Mn-54 <2.16E+OO O.OOE+OO 2.16E+OO Co-58 <2.40E+OO O.OOE+OO 2.40E+OO Fe-59 <5.70E+OO D.DDE+OO 5.70E+DO Co-60 <2.49E+OD D.OOE+DO 2.49E+OD Zn-65 <4.96E+OD D.OOE+OO 4.96E+OD Zr-95 <4.40E+DD D.ODE+DD 4.40E+OO Nb-95 <3.D2E+OO D.DOE+OO 3.02E+OO 1-131 <1.04E+D1 O.OOE+OO 1.04E+01 Cs-134 <2.67E+OO D.OOE+OO 2.67E+DO Cs-137 <2.1DE+OO O.OOE+OO 2.10E+OO Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories 69 of 91 En~

Appendix E - Page Duke Energy Annual Report -Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: SURFACE WATER Concentration (Activity): pCi/I Sample.Point 063.1 [INDICATOR- E@ 0.79 miles]

Sample ID: 412261 Sample Dates: 4/25/2016 - 5/23/20.16 Nuclide Activity 2 Sigma Error MDA Bala-140 <5.24E+OO O.OOE+OO 5.24E+OO Be-7 <2.20E+01 O.OOE+OO 2.20E+01 K-40 <3.74E+01 O.OOE+OO 3.74E+01 Sample ID: 413190 Sample Dates: 2/29/2016 - 5/23/2016 Nuclide Activity 2 Sigma Error MDA H3SW 3.38E+03 1.99E+02 1.95E+02 Sample ID: 415068 Sample Dates: 5/23/2016 - 6/20/2016 Nuclide Activity 2 Sigma Error MDA Mn-54 <3.06E+OO O.OOE+OO 3.06E+OO Co-58 <3.19E+OO O.OOE+OO 3.19E+OO Fe-59 <7.31E+OO O.OOE+OO 7.31E+OO Co-60 <3.06E+OO O.OOE+OO 3.06E+OO Zn-65 <6.26E+OO O.OOE+OO 6.26E+OO Zr-95 <5.44E+OO O.OOE+OO 5.44E+OO Nb-95 <4.85E+OO O.OOE+OO 4.85E+OO 1-131 <1.20E+01 O.OOE+OO 1.20E+01 Cs-134 <2.81E+OO O.OOE+OO 2.81E+OO Cs-137 <3.31E+OO O.OOE+OO 3.31E+OO Bala-140 <4.16E+OO O.OOE+OO 4.16E+OO Be-7 <2.53E+01 O.OOE+OO 2.53E+01 K-40 <5.42E+01 O.OOE+OO 5.42E+01 Sample ID: 417450 Sample Dates: 6/20/2016 -7/18/2016 Nuclide Activity 2 Sigma Error MDA Mn-54 <4.18E+OO O.OOE+OO 4.18E+OO Co-58 <5.83E+OO O.OOE+OO 5.83E+OO Fe-59 <1.15E+01 O.OOE+OO 1.15E+01 Co-60 <3.83E+OO O.OOE+OO 3.83E+OO Zn-65 <8.29E+OO O.OOE+OO 8.29E+OO Zr-95 <6.20E+oq O.OOE+OO 6.20E+OO Nb-95 <4.76E+OO O.OOE+OO 4.76E+OO 1-131 <1.18E+01 O.OOE+OO 1.18E+01 Cs-134 <4.22E+OO O.OOE+OO 4.22E+OO Cs-137 <2.BOE+OO O.OOE+OO 2.80E+OO Bala-140 <9.55E+OO O.OOE+OO 9.55E+OO Be-7 <3.79E+01 O.OOE+OO 3.79E+01 K-40 <5.01E+01 O.OOE+OO 5.01E+01 Sample ID: 419535 Sample Dates: 7/18/2016 -8/15/2016 Nuclide Activity 2 Sigma Error MDA Mn-54 <2.90E+OO O.OOE+OO 2.90E+OO Co-58 <3.94E+OO O.OOE+OO 3.94E+OO Fe-59 <7.11 E+OO O.OOE+OO 7.11E+OO Co-60 <2.48E+OO D.OOE+OO 2.48E+OO Zn-65 <6.63E+OO O.OOE+OO 6.63E+OO Zr-95 <6.48E+OO O.OOE+OO 6.48E+OO Nb-95 <4.10E+OO O.OOE+OO 4.10E+OO 1-131 <1.16E+01 O.OOE+OO 1.16E+01 Cs-134 <2.98E+OO O.OOE+OO 2.98E+OO Cs-137 <3.81E+OO O.OOE+OO 3.81E+OO Bala-140 <9.11 E+OO O.OOE+OO 9.11E+OO Be-7 <2.57E+01 O.OOE+OO 2.57E+01 K-40 6.82E+01 3.24E+01 4.11E+01 Sample ID: 420871 Sample Dates: 5/23/2016 - 8/15/2016 Nuclide Activity 2 Sigma Error MDA H3SW 4.64E+03 2.04E+02 1.96E+02 Sample ID: 422612 Sample Dates: 8/15/2016 - 9/12/2016 Nuclide Activity 2 Sigma Error MDA Mn-54 <1.85E+OO O.OOE+OO 1.85E+OO Co-58 <2.42E+OO O.OOE+OO 2.42E+OO Fe-59 <5.66E+OO O.OOE+OO 5.66E+OO Co-60 <2.29E+OO 0.00E+OO 2.29E+OO Zn-65 <3.09E+OO O.OOE+OO 3.09E+OO Zr-95 <3.57E+OO O.DOE+OO 3.57E+OO Nb-95 <3.17E+OO O.OOE+OO 3.17E+OO 1-131 <1.19E+01 O.OOE+OO 1.19E+01 Cs-134 <2.16E+OO O.OOE+OO 2.16E+OO Cs-137 <2.36E+OO O.DOE+OO 2.36E+OO Bala-140 <6.36E+OO O.OOE+OO 6.36E+OO Be-7 <2.30E+01 O.OOE+OO 2.30E+01 EnRad Laboratories Appendix E - Page 70 of 91 Report Generated @ 4/4/2017 13:40:53 Duke Energy Annual Report -Appendix E En~ 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: SURFACE WATER Concentration (Activity): pCi/I Sample Point 063.f[ INDICATOR- E@ 0.79 miles]

Sample ID: 422612 Sample Dates: B/15/2016 - 9/12/2016 Nuclide Activity 2 Sigma Error MDA K-40 4.54E+01 2.26E+01 3.06E+01 Sample ID: 426033 Sample Dates: 9/12/2016 -10/10/2016 Nuclide Activity 2 Sigma Error MDA Mn-54 <2.69E+OO O.OOE+OO 2.69E+OO Co-58 <3.01E+OO O.OOE+OO 3.01E+OO Fe-59 <8.25E+OO O.OOE+OO 8.25E+OO Co-60' <2.14E+OO O.OOE+OO 2.14E+OO Zn-65 <6.38E+OO O.OOE+OO 6.38E+OO Zr-95 <6.61E+OO O.OOE+OO 6.61E+OO Nb-95 <4.22E+OO O.OOE+OO 4.22E+OO 1-131 <1.14E+01 O.OOE+OO 1.14E+01 Cs-134 <3.09E+OO O.OOE+OO 3.09E+OO Cs-137 <3.58E+OO O.OOE+OO 3.58E+OO Bala-140 <7.64E+OO O.OOE+OO 7.64E+OO Be-7 <3.24E+01 O.OOE+OO 3.24E+01 K-40 5.09E+01 2.94E+01 4.02E+01 Sample ID: 428258 Sample Dates: 10/10/2016 -11/7/2016 Nuclide Activity 2 Sigma Error MDA Mn-54 <2.50E+OO O.OOE+OO 2.50E+OO Co-58 <2.69E+OO O.OOE+OO 2.69E+OO Fe-59 <5.86E+OO O.OOE+OO 5.86E+OO Co-60 <2.77E+OO O.OOE+OO 2.77E+OO Zn-65 <6.85E+OO O.OOE+OO 6.85E+OO Zr-95 <3.86E+OO O.OOE+OO 3.86E+OO Nb-95 <4.29E+OO O.OOE+OO 4.29E+OO 1-131 <1.16E+01 O.OOE+OO 1.16E+01 Cs-134 <2.30E+OO O.OOE+OO 2.30E+OO Cs-137 <3.33E+OO O.OOE+OO 3.33E+OO Bala-140 <6.42E+OO O.OOE3+00 6.42E+OO Be-7 <2.37E+01 O.OOE+OO 2.37E+01 K-40 <5.14E+01 O.OOE+OO 5.14E+01 Sample ID: 427850 Sample Dates: B/15/2016 - 12/5/2016 Nuclide Activity 2 Sigma Error MDA H3SW 4.71E+03 2.04E+02 1.88E+02 Sample ID: 430622 Sample Dates: 11/7/2016 - 12/5/2016 Nuclide Activity 2 Sigma Error MDA Mn-54 <2.68E+OO O.OOE+OO 2.68E+OO Co-58 <2.98E+OO O.OOE+OO 2.98E+OO Fe-59 <7.55E+OO O.OOE+OO 7.55E+OO Co-60 <2.15E+OO O.OOE+OO 2.15E+OO Zn-65 <6.20E+OO O.OOE+OO 6.20E+OO Zr-95 <6.18E+OO 0.00E+OO 6.18E+OO Nb-95 <4.09E+OO O.OOE+OO 4.09E+OO 1-131 <1.11E+01 O.OOE+OO 1.11E+01 Cs-134 <3.97E+OO O.OOE+OO 3.97E+OO Cs-137 <4.00E+OO O.OOE+OO 4.00E+OO Bala-140 <8.38E+OO O.OOE+OO 8.38E+OO Be-7 <2.60E+01 O.OOE+OO 2.60E+01 K-40 <4.93E+01 0.00E+OO 4.93E+01 Media Type: TLD Concentration (Activity): mR/Standard Quarter Sample Point 020 [INDICATOR- N @0.16 miles] TLD RING TLD_INNER Sample ID: 403503 Sample Dates: 12/15/2015 -3/15/2016 Nuclide Activity mR/Std Qtr 21.23 Sample ID: 413077 Sample Dates: 3/15/2016 - 6/14/2016 Nuclide Activity mR/Std Qtr 20.66 Sample ID: 421076 Sample Dates: 6/14/2016 - 9/13/2016 Nuclide Activity mR/Std Qtr 17.09 Sample ID: 430420 Sample Dates: 9/13/2016 -12/13/2016 Nuclide Activity mR/Std Qtr 20.23 Sample Point 021 [INDICATOR - NNE@ 0.25 miles] TLD RING TLD_INNER Sample ID: 403504 Sample Dates: 12/1512015 - 3115/2016 Nuclide Activity mR/Std Qtr 15.39 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 71 of 91 Duke Energy Annual Report-Appendix E En:=> 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report- 2016. (Appendix E)

Media Type: TLD Concentration (Activity): mR/Standard Quarter Sample Poinf<l21 [INDICATOR'- NNE @ 0.25 miles] TLD RING TLD_INNER Sample ID:' 413078 Sample Dates: 3/15/2016 -6/14/2016 Nuclide Activity mRIStd Qtr 14.19 Sample ID: 421077 Sample Dates: 6/14/2016 - 9/13/2016 Nuclide Activity mR/Std Qtr 12.60 Sample ID: 430421 Sample Dates: 9/13/2016 -12/13/2016 Nuclide Activity mRIStd Qtr 14.49 Sample Point 022 [INDICATOR - NE @ 0.53 miles] TLD RING TLD_INNER Sample ID: 403505 Sample Dates: 12/15/2015 - 3/15/2016 Nuclide Activity mR/Std Qtr 25.19 Sample ID: 413079 Sample Dates: 3/15/2016 - 6/14/2016 Nuclide Activity mRIStd Qtr 22.62 Sample ID: 421078 Sample Dates: 6/14/2016 - 9/13/2016 Nuclide Activity mR/Std Qtr 19.88 Sample ID: 430422 Sample Dates: 9/13/2016 -12/13/2016 Nuclide Activity mRIStd Qtr 25.30 Sample Point 023 [INDICATOR - ENE @ 0.93 miles ] TLD RING TLD_INNER Sample ID: 403506 Sample Dates: 12/15/2015 - 3/15/2016 Nuclide Activity mR/Std Qtr 26.17 Sample ID: 413080 Sample Dates: 3/15/2016 - 6/14/2016 Nuclide Activity mR/Std Qtr 24.90 Sample ID: 421079 Sample Dates: 6/14/2016 - 9/13/2016 Nuclide Activity mRIStd Qtr 20.70 Sample ID: 430423 Sample Dates: 9/13/2016 -12/13/2016 Nuclide Activity mRIStd Qtr 26.30 Sample Point 024 [INDICATOR - E @ 0.81 miles] TLD RING TLD_INNER Sample ID: 403507 Sample Dates: 12/15/2015 -3/15/2016 Nuclide Activity mR/Std Qtr 27.02 Sample ID: 413081 Sample Dates: 3/15/2016 - 6/14/2016 Nuclide Activity mR/Std Qtr 28.32 Sample ID: 421080 Sample Dates: 6/14/2016 - 9/13/2016 Nuclide Activity mR/Std Qtr 25.25 Sample ID: 430424 Sample Dates: 9/13/2016 - 12/13/2016 Nuclide Activity mR/Std Qtr 31.10 Sample Point 025 [INDICATOR - ESE@ 0.42 miles] TLD RING TLD_INNER Sample ID: 403508 Sample Dates: 12/15/2015 - 3/15/2016 Nuclide Activity mR/Std Qtr 19.92 Sample ID: 413082 Sample Dates: 3/15/2016 - 6/14/2016 Nuclide Activity mR/Std Qtr 20.04 Sample ID: 421081 Sample Dates: 6/14/2016 - 9/13/2016 Nuclide Activity mR/Std Qtr 15.88 Sample ID: 430425 Sample Dates: 9/13/2016 -12/13/2016 Nuclide Activity mR/Std Qtr 19.71 Sample Point 026 [INDICATOR - SE @ 0.34 miles] TLD RING TLD_INNER Sample ID: 403509 Sample Dates: 12/15/2015 -3/15/2016 Nuclide Activity mR/Std Qtr 19.34 Sample ID: 413083 Sample Dates: 3/15/2016 - 6/14/2016 Nuclide Activity mR/Std Qtr 17.30 Sample ID: 421082 Sample Dates: 6/14/2016 - 9/13/2016 Nuclide Activity mR/Std Qtr 15.12 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 72 of 91 Duke Energy Annual Report -Appendix E En~ 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental-Monitoring Analysis Report - 2016 (Appendix E)

Media Type: TLD Concentration (Activity): mR/Standard Quarter Sample Point 026 [INDICATOR - SE@ 0.34 miles] TLD RING TLD_INNER Sample ID: 430426 Sample Dates: 911312016 -12113/2016 Nu"clide Activity mR/Std Qtr 15.88 Sample Point 027 [INDICATOR - SSE @ 0.49 miles] TLD RING TLD_INNER Sample ID: 403510 Sample Dates: 12/15/2015 - 3/15/2016 Nuclide Activity mR/Std Qtr 21.00 Sample ID: 413084 Sample Dates: 3/15/2016 -6/14/2016 Nuclide Activity mR/Std Qtr 18.75 Sample ID: 421083 Sample Dates: 6/14/2016 - 9/13/2016 Nuclide Activity mR/Std Qtr 17.73 Sample ID: 430427 Sample Dates: 9/1312016 -12/13/2016 Nuclide Activity mR/Std Qtr 20.26 Sample Point 028 [INDICATOR - S @ 0.46 miles] TLD RING TLD_INNER Sample ID: 403511 Sample Dates: 1211512015 - 3/15/2016 Nuclide Activity mR/Std Qtr 18.82 Sample ID: 413085 Sample Dates: 3/15/2016 - 6/14/2016 Nuclide Activity mR/Std Qtr 16.94 Sample ID: 421084 Sample Dates: 6/14/2016 - 9113/2016 Nuclide Activity mR/Std Qtr 15.34 Sample ID: 430428 Sample Dates: 9/13/2016 - 12/13/2016 Nuclide Activity mR/Std Qtr 17.33 Sample Point 029 [INDICATOR - SSW@ 0.56 miles] TLD RING TLD_INNER Sample ID: 403512 Sample Dates: 12/15/2015 - 3t15/2016 Nuclide Activity mR/Std Qtr 16.94 Sample ID: 413086 Sample Dates: 3/15/2016 - 6/14/2016 Nuclide Activity mR/Std Qtr 16.80 Sample ID: 421085 Sample Dates: 6/14/2016 - 9/13/2016 Nuclide Activity mR/Std Qtr 13.61 Sample ID: 430429 Sample Dates: 9/13/2016 -12/13/2016 Nuclide Activity mR/Std Qtr 19.78 Sample Point 030 [INDICATOR - SW@ 0.42 miles] TLD RING TLD_INNER Sample ID: 403513 Sample Dates: 12/15/2015 - 3/15/2016 Nuclide Activity mR/Std Qtr 20.17 Sample ID: 413087 Sample Dates: 3/15/2016 - 6/14/2016 Nuclide Activity mR/Std Qtr 19.21 Sample ID: 421086 Sample Dates: 6/14/2016 - 9/13/2016 Nuclide Activity mR/Std Qtr 15.73 Sample ID: 430430 Sample Dates: 9/13/2016 - 12/13/2016 Nuclide Activity mR/Std Qtr 18.48 Sample Point 031 [INDICATOR - WSW@ 0.27 miles] TLD RING TLD_INNER Sample ID: 403514 Sample Dates: 12/15/2015 - 3/15/2016 Nuclide Activity mR/Std Qtr 19.31 Sample ID: 413088 Sample Dates: 3/1512016-6/14/2016 Nuclide Activity mR/Std Qtr 16.69 Sample ID: 421087 Sample Dates: 6/14/2016- 9/13/2016 Nuclide Activity mR/Std Qtr 15.10 Sample ID: 430431 Sample Dates: 9/13/2016 -12/13/2016 Nuclide Activity mR/Std Qtr 17.55 Report Generated @4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 73 of 91 Duke Energy Annual Report -Appendix E En;) 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: TLD Concentration (Activity): mR/Standard Quarter Sample Point 032 [INDICATOR - WNW@ 0.19 miles 1** .. TLD RING TLD_INNER Sample ID: 403515 Sample Dates: 12/15/2015 -3/15/2016 Nuclide Activity mR/Std Qtr 23.21 Sample ID: 413089 Sample Dates: 3/15/2016 - 6/14/2016 Nuclide Activity mR/Std Qtr 19.44 Sample ID: 421088 Sample Dates: 6/14/2016 -9/13/2016 Nuclide Activity mR/Std Qtr 17.40 Sample ID: 430432 Sample Dates: 9/13/2016 -12/13/2016 Nuclide Activity mR/Std Qtr 20.75 Sample Point 033 [INDICATOR - WNW@ 0.21 miles] TLD RING TLD_INNER Sample ID: 403516 Sample Dates: 12/15/2015 -3/15/2016 Nuclide Activity mR/Sld Qtr 20.63 Sample ID: 413090 Sample Dates: 3/15/2016 - 6/14/2016 Nuclide Activity mRIStd Qtr 17.02 Sample ID: 421089 Sample Dates: 6/14/2016 - 9/13/2016 Nuclide Activity mR/Std Qtr 15.15 Sample ID: 430433 Sample Dates: 9/13/2016 -12/13/2016 Nuclide Activity mR/Std Qtr 17.98 Sample Point 034 [ INDICATOR - NW@ 0.22 miles] TLD RING TLD_INNER Sample ID: 403517 Sample Dates: 12/15/2015-3/15/2016 Nuclide Activity mR/Std Qtr 21.09 Sample ID: 413091 Sample Dates: 3/15/2016 - 6/14/2016 Nuclide Activity mR/Std Qtr 19.56 Sample ID: 421090 Sample Dates: 6/14/2016 - 9/13/2016 Nuclide Activity mR/Std Qtr 16.03 Sample ID: 430434 Sample Dates: 9/13/2016 -12/13/2016 Nuclide Activity mR/Std Qtr 18.65 Sample Point 035 [INDICATOR - NNW@0.17 miles] TLD RING TLD_INNER Sample ID: 403518 Sample Dates: 12/15/2015 - 3/15/2016 Nuclide Activity mR/Std Qtr 27.02 Sample ID: 413092 Sample Dates: 3/15/2016 -6/14/2016 Nuclide Activity mR/Std oir 24.46 Sample ID: 421091 Sample Dates: 6/14/2016 - 9/13/2016 Nuclide Activity mR/Std Qlr 20.92 Sample ID: 430435 Sample Dates: 9/1312016 -12/13/2016 Nuclide Activity

.mRJStd Qtr 24.40 Sample Point 036 [ INDICATOR - N @4.18 miles] TLD RING TLD_OUTER Sample ID: 403519 Sample Dates: 12115/2015 - 3115/2016 Nuclide Activity mRIStd Qtr 29.91 Sample ID: 413093 Sample Dates: 3/15/2016 - 6/14/2016 Nuclide Activity mRIStd Qtr 27.64 Sample ID: 421092 Sample Dates: 6/14/2016 - 9/13/2016 Nuclide Activity mRIStd Qtr 23.52 Sample ID: 430436 Sample Dates: 9/1312016 -12/1312016 Nuclide Activity mR/Sld Qtr 28.20 Sample Point 037 [INDICATOR - NNE@ 4.85 miles] TLD RING TLD_OUTER Sample ID: 403520 Sample Dates: 12/15/2015 - 3/15/2016 Nuclide Activity mR/Std Qtr 20.31 Sample ID: 413094 Sample Dates: 3/15/2016 - 6114/2016 Nuclide Activity mR/Std Qtr 21.40 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 74 of 91 Duke Energy Annual Report -Appendix E En~ 13339 Hagers Ferry Road Huntersville, North Carolina 28078

. OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: TLD Concentration (Activity): mR/Standard Quarter Sample Point 037 [INDICATOR - NNE @ 4.85 miles] TLD RING n::o_OUTER TLD RING TLD_OUTER TLD RING TLD_OUTER TLD RING TLD_OUTER TLD RING TLD_OUTER TLD RING TLD_OUTER Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 75 of 91 Duke Energy Annual Report - Appendix E En:=:> 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: TLD Concentration (Activity): mR/Standard Quarter Sample Point 043 [INDICATOR - SSE@ 4.09 miles] TLD RING TLD.:..OUTER .,

Sample ID: 403526 Sample Dates: 12/15/2015 -3/15/2016 Nuclide Activity mRJStd Qtr 26.71 Sample ID: 413100 Sample Dates: 3/15/2016 -6/14/2016 Nuclide Activity mR!Std Qtr 25.44 Sample ID: 421099 Sample Dates: 6/14/2016 -9/13/2016 Nuclide Activity mR!Std Qtr 22.31 Sample ID: 430443 Sample Dates: 9/13/2016 -12/13/2016 Nuclide Activity mR/Std Qtr 26.23 Sample Point 044 [INDICATOR - S @ 3.96 miles] TLD RING TLD_OUTER Sample ID: 403527 Sample Dates: 12/15/2015 - 3/15/2016 Nuclide Activity mR!Std Qtr 21.07 Sample ID: 413101 Sample Dates: 3/15/2016 -6/14/2016 Nuclide Activity mR!Std Qtr 19.51 Sample ID: 421100 Sample Dates: 6/14/2016 -9/13/2016 Nuclide Activity mR!Std Qtr 18.02 Sample ID: 430444 Sample Dates: 9/13/2016 -12/13/2016 Nuclide Activity mR!Std Qtr 19.44 Sample Point 045 [INDICATOR - SSW@ 4.78 miles] TLD RING TLD_OUTER Sample ID: 403528 Sample Dates: 12/15/2015 -3/15/2016 Nuclide Activity mR/Std Qtr 17.76 Sample ID: 413102 Sample Dates: 3/15/2016 - 6/14/2016 Nuclide Activity mR!Std Qtr 18.53 Sample ID: 421101 Sample Dates: 6/14/2016 - 9/13/2016 Nuclide Activity mR!Std Qtr 15.72 Sample ID: 430445 Sample Dates: 9/13/2016 -12/13/2016 Nuclide Activity mR!Std Qtr 19.41 Sample Point 046 [INDICATOR - SW@ 4.61 miles] TLD RING TLD_OUTER Sample ID: 403529 Sample Dates: 12/15/2015 - 3/15/2016 Nuclide Activity mR!Std Qtr 23.72 Sample ID: 413103 Sample Dates: 3/15/2016 - 6/14/2016 Nuclide Activity mR!Std Qtr 25.98 Sample ID: 421102 Sample Dates: 6/14/2016 - 9/13/2016 Nuclide Activity mRJStd Qtr 20.84 Sample ID: 430446 Sample Dates: 9/13/2016 -12/13/2016 Nuclide Activity mR!Std Qtr 22.64 Sample Point 047 [ INDICATOR - WSW@ 3.58 miles] TLD RING TLD_OUTER Sample ID: 403530 Sample Dates: 12/15/2015 -3/15/2016 Nuclide Activity mR!Std Qtr 25.53 Sample ID: 413104 Sample Dates: 3/15/2016 - 6/14/2016 Nuclide Activity mR!Std Qtr 23.10 Sample ID: 421103 Sample Dates: 6/14/2016 - 9/13/2016 Nuclide Activity mR!Std Qtr 19.27 Sample ID: 430447 Sample Dates: 9/13/2016 -12/13/2016 Nuclide Activity mR!Std Qtr 23.69 Sample Point 048 [ INDICATOR - W@ 3.64 miles ] TLD RING TLD_OUTER Sample ID: 403531 Sample Dates: 12/15/2015 - 3/15/2016 Nuclide Activity mR!Std Qtr 28.16 Sample ID: 413105 Sample Dates: 3/15/2016 -6/14/2016 Nuclide Activity mR/Std Qtr 26.48 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 76 of 91 Duke Energy Annual Report -Appendix E EnY 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report.- 2016 (Appendix E)

Media Type: TLD Concentration (Activity): mR/Standard Quarter Sampie Point 048 [INDICATOR - W@ 3.64 miles l TLD RING TLD_OUTER Sample ID: 421104 Sample Dates: 6/14/2016 - 9/1312016 Nuclide Activity mR/Std Qtr 22.40 Sample ID: 430448 Sample Dates: 9/13/2016 -12/13/2016 Nuclide Activity mR/Std Qtr 28.86 Sample Point 049 [INDICATOR - WNW@ 3.6 miles ] TLD RING TLD_OUTER Sample ID: 403532 Sample Dates: 12/15/2015

3/15/2016 Nuclide Activity mRIStd Qtr 23.04 Sample ID: 413106 Sample Dates: 3/15/2016 - 6/14/2016 Nuclide Activity mR/Std Qtr 21.56 Sample ID: 421105 Sample Dates: 6/14/2016 - 9/13/2016 Nuclide Activity mR/Std Qtr 19.53 Sample ID: 430449 Sample Dates: 9/13/2016 -12/13/2016 Nuclide Activity mRIStd Qtr 25.04 Sample Point 050 [INDICATOR - NW@ 3.53 miles] TLD RING TLD_OUTER Sample ID: 403533 Sample Dates: 12/15/2015 - 3/15/2016 Nuclide Activity mR/Std Qtr 20.58 Sample ID: 413107 Sample Dates: 3/15/2016

6/14/2016 Nuclide Activity mR/Std Qtr 19.30 Sample ID: 421106 Sample Dates: 6/14/2016

9/13/2016 Nuclide Activity mR/Std Qtr 16.29 Sample ID: 430450 Sample Dates: 9/13/2016 -12/13/2016 Nuclide Activity mR/Std Qtr 21.'39 Sample Point 051 [INDICATOR - NNW@ 4.64 miles] TLD RING TLD_OUTER Sample ID: 403534 Sample Dates: 12/15/2015 -3/15/2016 Nuclide Activity mR/Std Qtr 19.92 Sample ID: 413108 Sample Dates: 3/15/2016 - 6/14/2016 Nuclide Activity mR/Std Qtr 20.42 Sample ID: 421107 Sample Dates: 6/14/2016 - 9/13/2016 Nuclide Activity mR/Std Qtr 18.19 Sample ID: 430451 Sample Dates: 9/13/2016 -12/13/2016 Nuclide Activity mR/Std Qtr 19.98 Sample Point 052 [INDICATOR - ENE@ 12.4 miles] TLD RING TLD_SPEC Sample ID: 403535 Sample Dates: 12/15/2015 -3/15/2016 Nuclide Activity mR/Std Qtr 26.82 Sample ID: 413109 Sample Dates: 3/15/2016 - 6/14/2016 Nuclide Activity mR/Std Qtr 25.10 Sample ID: 421108 Sample Dates: 6/14/2016 - 9/13/2016 Nuclide Activity.

mRIStd Qtr 19.48 Sample ID: 430452 Sample Dates: 9/13/2016-12/13/2016 Nuclide Activity mR/Std Qtr 24.94 Sample Point 053 [INDICATOR - E@ 11.7 miles] TLD RING TLD_SPEC Sample ID: 403536 Sample Dates: 12/15/2015 -3/15/2016 Nuclide Activity mR/Std Qtr 29.40 Sample ID: 413110 Sample Dates: 3/15/2016 - 6/14/2016 ,Nuclide Activity mR/Std Qtr 26.36 Sample ID: 421109 Sample Dates: 6/14/2016 - 9/13/2016 Nuclide Activity mR/Std Qtr 20.88 Sample ID: 430453 Sample Dates: 9/13/2016 - 12/13/2016 Nuclide Activity mR/Std Qtr 26.03 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 77 of 91 Duke Energy Annual Report -Appendix E En=:> 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: TLD Concentration (Activity): mR/Standard Quarter Sample Point 054'[ INDICATOR - ESE@ 8.6 miles] TLD RING TLD_SPEC Sample ID: 403537 Sample Dates: 12/15/2015 -3/15/2016 Nuclide Activity mR/Std Qtr 21.27 Sample ID: 413111 Sample Dates: 3/15/2016 -6/14/2016 Nuclide Activity mR/Std Qtr 19.38 Sample ID: 421110 Sample Dates: 6/14/2016 - 9/13/2016 Nuclide Activity mR/Std Qtr 15.33 Sample ID: 430454 Sample Dates: 9/13/2016 -12/13/2016 Nuclide Activity mRIStd Qtr 18.45 Sample Point 055 [INDICATOR - SSE @ 9.27 miles] TLD RING TLD_SPEC Sample ID: 403538 Sample Dates: 12/15/2015 - 3/15/2016 Nuclide Activity mR/Std Qtr 17.99 Sample ID: 413112 Sample Dates: 3/15/2016 - 6/14/2016 Nuclide Activity mR/Std Qtr 17.91 Sample ID: 421111 Sample Dates: 6/14/2016 - 9/13/2016 Nuclide Activity mR/Std Qtr 13.95 Sample ID: 430455 Sample Dates: 9/13/2016 -12/13/2016 Nuclide Activity mR/Std Qtr 16.00 Sample Point 056 [INDICATOR - SSW@ 7.3 miles] TLD RING TLD_SPEC Sample ID: 403539 Sample Dates: 12/15/2015 -3/15/2016 Nuclide Activity mR/Std Qtr 27.00 Sample ID: 413113 Sample Dates: 3/15/2016 -6/14/2016 Nuclide Activity mR/Std Qtr 25.18 Sample ID: 421112 Sample Dates: 6/14/2016 - 9/13/2016 Nuclide Activity mR/Std Qtr 22.12 Sample ID: 430456 Sample Dates: 9/13/2016 -12/13/2016 Nuclide Activity mRIStd Qtr 26.84 Sample Point 057 [INDICATOR - SW@ 8.42 miles] TLD RING TLD_SPEC Sample ID: 403540 Sample Dates: 12/15/2015 - 3/15/2016 Nuclide Activity mR/Std Qtr 28.11 Sample ID: 413114 Sample Dates: 3/15/2016 -6/14/2016 Nuclide Activity mR/Std Qtr 24.36 Sample ID: 421113 Sample Dates: 6/14/2016 - 9/13/2016 Nuclide Activity mR/Std Qtr 22.58 Sample ID: 430457 Sample Dates: 9/13/2016 -12/13/2016 Nuclide Activity mR/Std Qtr 25.12 Sample Point 058 [CONTROL - WSW@ 9.39 miles] TLD RING TLD_CTRL Sample ID: 403541 Sample Dates:* 12/15/2015 -3/15/2016 Nuclide Activity mR/Std Qtr 35.86 Sample ID: 413115 Sample Dates: 3/15/2016 -6/14/2016 Nuclide Activity mR/Std Qtr 31.94 Sample ID: 421114 Sample Dates: 6/14/2016 - 9/13/2016 Nuclide Activity mR/Std Qtr 28.23 Sample ID: 430458 Sample Dates: 9/13/2016 -12/13/2016 Nuclide Activity mR/Std Qtr 32.95 Sample Point 059 [INDICATOR - NW@ 9.2 miles] TLD RING TLD_SPEC Sample ID: 403542 Sample Dates: 12/15/2015 -3/15/2016 Nuclide Activity mR/Std Qtr 27.18 Sample ID: 413116 Sample Dates: 3/15/2016 - 6/14/2016 Nuclide Activity mR/Std Qtr 25.84 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 78 of 91 .

Duke Energy Annual Report -Appendix E En?> 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: TLD Concentration (Activity): mR/Standard Quarter Sample Point 059 [ INDICATOR - NW@ 9.2 miles] TLD RING TLD_SPEC Sample ID: 430459 Sample Dates: 9/13/2016 - 12/13/2016 Nuclide Activity mR/Std Qtr 30.10 Sample Point 076 [INDICATOR - W@ 0.19 miles] TLD RING TLD_INNER Sample ID: 403543 Sample Dates: 12/15/2015 - 3/15/2016 Nuclide Activity mR/Std Qtr 25.35 Sample ID: 413117 Sample Dates: 3/15/2016 - 6/14/2016 Nuclide Activity mR/Std Qtr 24.00 Sample ID: 421116 Sample Dates: 6/14/2016 - 9/13/2016 Nuclide Activity mR/Std Qtr 22.06 Sample ID: 430460 Sample Dates: 9/13/2016 - 12/13/2016 Nuclide Activity mR/Std Qtr 25.70 Sample Point 077 [INDICATOR - SW@ 1 miles] TLD RING TLD_SPEC Sample ID: 403559 Sample Dates: 12/15/2015 - 3/15/2016 Nuclide Activity mR/Std Qtr 21.80 Sample ID: 413133 Sample Dates: 3/15/2016 - 6/14/2016 Nuclide Activity mR/Std Qtr 20.07 Sample ID: 421117 Sample Dates: 6/14/2016 - 9/13/2016 Nuclide Activity mR/Std Qtr 17.02 Sample ID: 430461 Sample Dates: 9/13/2016 - 12/13/2016 Nuclide Activity mR/Std Qtr 17.24 Sample Point 078.1 [INDICATOR -WSW@ 0.53 miles] TLD RING TLD_SPEC Sample ID: 403558 Sample Dates:' 12/15/2015 - 3/15/2016 Nuclide Activity mR/Std Qtr 28.68 Sample ID: 413132 Sample Dates: 3/15/2016 -6/14/2016 Nuclide Activity mR/Std Qtr 26.75 Sample ID: 421118 Sample Dates: 6/14/2016 - 9/13/2016 Nuclide Activity mR/Std Qtr 23.30 Sample ID: 430462 Sample Dates: 9/13/2016 - 12/13/2016 Nuclide Activity mR/Std Qtr 25.92 Sample Point 081 [CONTROL - SE @ 9.33 miles] TLD RING TLD_CTRL Sample ID: 403544 Sample Dates: 12/15/2015 -3/15/2016 Nuclide Activity mR/Std Qtr 25.85 Sample ID: 413118 Sample Dates: 3/15/2016 - 6/14/2016 Nuclide Activity mR/Std Qtr 23.84 Sample ID: 421119 Sample Dates: 6/14/2016 - 9/13/2016 Nuclide Activity mR/Std Qtr 20.69 Sample ID: 430463 Sample Dates: 9/13/2016 -12/13/2016 Nuclide Activity mR/Std Qtr 22.93 Sample Point 085 [INDICATOR

NNW@ 0.88 miles] TLD RING TLD_SPEC Sample ID: 403569 Sample Dates: 12/15/2015

3/15/2016 Nuclide Activity mR/Std Qtr 21.82 Sample ID: 413143 Sample Dates: 3/15/2016 - 6/14/2016 Nuclide Activity mR/Std Qtr 21.06 Sample ID: 421120 Sample Dates: 6/14/2016

9/13/2016 Nuclide Activity mR/Std Qtr 18.03 Sample ID: 430464 Sample Dates: 9/13/2016 -12/13/2016 Nuclide Activity mR/Std Qtr 19.50 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 79 of 91 Duke Energy Annual Report -Appendix E En:> 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological.Environmental Monitoring Analysis Report- 2016 (Appendix E)

Media Type: TLD Concentration (Activity): mR/Standard Quarter Sample Point 086 [INDICATOR - NW@ 0.83 miles] TLD RING TLD_SPEC Sample ID: 403570. Sample Dates: 12/15/2015 -3/15/2016 Nuclide Activity mR/Std Qtr 19.64 Sample ID: 413144 Sample Dates: 3/15/2016 -6/14/2016 Nuclide Activity mR/Std Qtr 16.76 Sample ID: 421121 Sample Dates: 6/14/2016 - 9/13/2016 Nuclide Activity mR/Std Qtr 16.05 Sample ID: 430465 Sample Dates: 9/13/2016 -12/13/2016 Nuclide Activity mR/Std Qtr 19.62 Sample Point 087 [INDICATOR - WNW@ 1.33 miles] TLD RING TLD_SPEC Sample ID: 403557 Sample Dates: 12115/2015 - 3/15/2016 Nuclide Activity mR/Std Qtr 19.64 Sample ID: 413131 Sample Dates: 3/15/2016 - 6/14/2016 Nuclide Activity mR/Std Qtr 18.82 Sample ID: 421122 Sample Dates: 6/14/2016 -9/13/2016 Nuclide Activity mR/Std Qtr 15.42 Sample ID: 430466 Sample Dates: 9/13/2016 -12/13/2016 Nuclide Activity mR/Std Qtr 18.78 Sample Point 088 [INDICATOR - SSW@ 1 miles] TLD RING TLD_SPEC Sample ID: 403560 Sample Dates: 12/15/2015 - 3/15/2016 Nuclide Activity mR/Std Qtr 22.20 Sample ID: 413134 Sample Dates: 3/15/2016 - 6/14/2016 Nuclide Activity mR/Std Qtr 20.62 Sample ID: 421123 Sample Dates: 6/14/2016 - 9/13/2016 Nuclide Activity mR/Std Qtr 18.34 Sample ID: 430467 Sample Dates: 9/13/2016 -12/13/2016 Nuclide Activity mR/Std Qtr 22.79 Sample Point 089 [INDICATOR - S @ 1.19 miles] TLD RING TLD_SPEC Sample ID: 403561 Sample Dates: 12/15/2015 -3/15/2016 Nuclide Activity mR/Std Qtr 24.66 Sample ID: 413135 Sample Dates: 3/15/2016 -6/14/2016 Nuclide Activity mR/Std Qtr 23.36 Sample ID: 421124 Sample Dates: 6/14/2016 - 9/13/2016 Nuclide Activity mR/Std Qtr 21.87 Sample ID: 430468 Sample Dates: 9/13/2016 -12/13/2016 Nuclide Activity mR/Std Qtr 23.24 Sample Point 090 [INDICATOR - SE@ 0.79 miles] TLD RING TLD_SPEC Sample ID: 403562 Sample Dates: 12/15/2015 - 3/15/2016 Nuclide Activity mR/Std Qtr 26.61 Sample ID: 413136 Sample Dates: 3/15/2016 - 6/14/2016 Nuclide Activity mR/Std Qtr 24.92 Sample ID: 421125 Sample Dates: 6/14/2016 - 9/13/2016 Nuclide Activity mR/Std Qtr 22.69 Sample ID: 430469 Sample Dates: 9/13/2016 -12/13/2016 Nuclide Activity mR/Std Qtr 24.53 Media Type: VEGETATION Concentration (Activity): pCi/kg wet Sample Point 077 [INDICATOR - SW@ 1 miles]

Sample ID: 398992 Sample Dates: 1/5/2016 -1/5/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2.65E+01 O.OOE+OO 2.65E+01 Co-58 <2.17E+01 O.OOE+OO 2.17E+01 Fe-59 <6.D2E+01 O.OOE+OO 6.02E+01 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 80 of 91 Duke Energy Annual Report -Appendix E En:> 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report- 2016 (Appendix E)

Media Type: VEGETATION Concentration (Activity): pCi/kg wet Sample Point 077 [INDICATOR - SW@ 1 miles]

Sample ID: 398992 s*ample Dates: 1/5/2016 -1/5/2016 MIXEDBLV Nuclide "Activity 2 Sigma Error MDA Co-60 <2.73E+01 O.OOE+OO 2.73E+01 Zn-65 <6.14E+01 O.OOE+OO 6.14E+01 Zr-95 <5.24E+01 O.OOE+OO 5.24E+01 Nb-95 <2.76E+01 O.OOE+OO 2.76E+01 1-131 <2.B3E+01 O.OOE+OO 2.83E+01 Cs-134 <3.40E+01 O.OOE+OO 3.40E+01 Cs-137 <3.42E+01 O.OOE+OO 3.42E+01 Bala-140 <1.06E+01 O.OOE+OO 1.06E+01 Be-7 1.88E+03 4.05E+02 3.67E+02 K-40 2.88E+03 6.79E+02 5.09E+02 Sample ID: 401040 Sample Dates: 2/1/2016 - 2/1/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2.66E+01 O.OOE+OO 2.66E+01 Co-58 <2.33E+01 O.OOE+OO 2.33E+01 Fe-59 <6.49E+01 O.OOE+OO 6.49E+01 Co-60 <3.64E+01 O.OOE+OO 3.64E+01 Zn-65 <5.41 E+01 O.OOE+OO 5.41E+01 Zr-95 <5.79E+01 O.OOE+OO 5.79E+01 Nb-95 <2.75E+01 O.OOE+OO 2.75E+01 1-131 <3.18E+01 O.OOE+OO 3.18E+01 Cs-134 <3.86E+01 O.OOE+OO 3.86E+01 Cs-137 <2.57E+01 O.OOE+OO 2.57E+01 Bala-140 <3.86E+01 O.OOE+OO 3.86E+01 Be-7 1.22E+03 3.11E+02 3.20E+02 K-40 2.24E+03 5.95E+02 5.59E+02 Sample ID: 404575 Sample Dates: 3/7/2016 - 3/7/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <3.52E+01 O.OOE+OO 3.52E+01 Co-58 <2.77E+01 O.OOE+OO 2.77E+01 Fe-59 <5.61E+01 O.OOE+OO 5.61E+01 Co-60 <3.33E+01 O.OOE+OO 3.33E+01 Zn-65 <6.65E+01 O.OOE+OO 6.65E+01 Zr-95 <5.48E+01 O.OOE+OO 5.48E+01 Nb-95 <2.69E+01 O.OOE+OO 2.69E+01 1-131 <2.69E+01 O.OOE+OO 2.69E+01 Cs-134 <3.70E+01 O.OOE+OO 3.70E+01 Cs-137 <3.07E+01 O.OOE+OO 3.07E+01 Bala-140 <4.07E+01 O.OOE+OO 4.07E+01 Be-7 1.58E+03 3.51E+02 3.37E+02 K-40 2.59E+03 5.82E+02 3.59E+02 Sample ID: 407606 Sample Dates: 4/412016 -4/4/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <1.38E+01 O.OOE+OO 1.38E+01 Co-58 <1.72E+01 O.OOE+OO 1.72E+01 Fe-59 <2.75E+01 O.OOE+OO 2.75E+01 Co-60 <1.25E+01 O.OOE+OO 1.25E+01 Zn-65 <3.71 E+01 O.OOE+OO 3.71E+01 Zr-95 <2.99E+01 O.OOE+OO 2.99E+01 Nb-95 <1.07E+01 O.OOE+OO 1.07E+01 1-131 <1.25E+01 O.OOE+OO 1.25E+01 Cs-134 <1.72E+01 O.OOE+OO 1.72E+01 Cs-137 <1.67E+01 O.OOE+OO 1.67E+01 Bala-140 <1.33E+01 O.OOE+OO 1.33E+01 Be-7 1.03E+03 2.22E+02 2.34E+02 K-40 3.45E+03 5.37E+02 2.87E+02 Sample ID: 410995 Sample Dates: 5/2/2016 -5/2/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2.03E+01 O.OOE+OO 2.03E+01 Co-58 <1.94E+01 O.OOE+OO 1.94E+01 Fe-59 <4.21 E+01 O.OOE+OO 4.21E+01 Co-60 <1.26E+01 O.OOE+OO 1.26E+01 Zn-65 <4.48E+01 O.OOE+OO 4.48E+01 Zr-95 <3.51E+01 O.OOE+OO 3.51E+01 Nb-95 <1.96E+01 O.OOE+OO 1.96E+01 1-131 <1.95E+01 O.OOE+OO 1.95E+01 Cs-134 <2.04E+01 D.OOE+OO 2.04E+01 Cs-137 <2.37E+01 O.OOE+OO 2.37E+01 Bala-140 <2.04E+01 O.OOE+OO 2.04E+01 EnRad Laboratories Report Generated @ 4/4/2017 13:40:53 Appendix E - Page 81 of 91 Duke Energy Annual Report -Appendix E En~ 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: VEGETATION Concentration (Activity): pCi/kg wet Sample Point 077 [ INDICATOR - SW@ 1 miles]

Sample ID: 410995 Sample Dates: 5/2/2016 - 5/2/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Be-7 2.54E+02 1.36E+02 1.90E+02 K-40 3.56E+03 6.16E+02 4.20E+02 Sample ID: 413393 Sample Dates: 6/6/2016 - 6/6/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <1.87E+01 O.OOE+OO 1.87E+01 Co-58 <1.31 E+01 O.OOE+OO 1.31E+01 Fe-59 <2.99E+01 O.OOE+OO 2.99E+01 Co-60 <2.03E+01 O.OOE+OO 2.03E+01 Zn-65 <3.83E+01 O.OOE+OO 3.83E+01 Zr-95 <2.85E+01 O.OOE+OO 2.85E+01 Nb-95 <1.43E+01 O.OOE+OO 1.43E+01 1-131 <1.53E+01 O.OOE+OO 1.53E+01 Cs-134 <1.85E+01 O.OOE+OO 1.85E+01 Cs-137 <1.72E+01 O.OOE+OO 1.72E+01 Bala-140 <2.30E+01 O.OOE+OO 2.30E+01 Be-7 6.73E+02 1.67E+02 1.99E+02 K-40 3.40E+03 4.80E+02 2.61E+02 Sample ID: 416445 Sample Dates: 7/5/2016 - 7/5/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2.37E+01 O.OOE+OO 2.37E+01 Co-58 <2.26E+01 O.OOE+OO 2.26E+01 Fe-59 <4.55E+01 O.OOE+OO 4.55E+01 Co-60 <1.64E+01 O.OOE+OO 1.64E+01 Zn-65 <S.79E+01 O.OOE+OO 5.79E+01 Zr-95 <4.19E+01 O.OOE+OO 4.19E+01 Nb-95 <2.47E+01 O.OOE+OO 2.47E+01 1-131 <1.98E+01 O.OOE+OO 1.98E+01 Cs-134 <3.06E+01 O.OOE+OO 3.06E+01 Cs-137 <1.77E+01 O.OOE+OO 1.77E+01 Bala-140 <2.08E+01 O.OOE+OO 2.08E+01 Be-7 5.03E+02 2.21E+02 3.15E+02 K-40 4.75E+03 7.08E+02 2.85E+02 Sample ID: 418318 Sample Dates: 8/1/2016 - 8/112016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2.42E+01 O.OOE+OO 2.42E+01 Co-58 <2.20E+01 O.OOE+OO 2.20E+01 Fe-59 <5.00E+01 O.OOE+OO 5.00E+01

'Co-60 <1.80E+01 O.OOE+OO 1.80E+01 Zn-65 <6.12E+01 O.OOE+OO 6.12E+01 Zr-95 <5.13E+01 O.OOE+OO 5.13E+01 Nb-95 <2.02E+01 O.OOE+OO 2.02E+01 1-131 <1.79E+01 O.OOE+OO 1.79E+01 Cs-134 <3.67E+01 O.OOE+OO 3.67E+01 Cs-137 <2.16E+01 O.OOE+OO 2.16E+01 Bala-140 <2.97E+01 O.OOE+OO 2.97E+01 Be-7 8.98E+02 2.50E+02 2.91E+02 K-40 3.74E+03 6.67E+02 4.73E+02 Sample ID: 421475 Sample Dates: 9/6/2016 - 9/6/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <1.28E+01 O.OOE+OO 1.28E+01 Co-58 <1.10E+01 0.00E+OO 1.10E+01 Fe-59 <2.02E+01 O.OOE+OO 2.02E+01 Co-60 <1.36E+01 O.OOE+OO 1.36E+01 Zn-65 <3.02E+01 O.OOE+OO 3.02E+01 Zr-95 <2.83E+01 O.OOE+OO 2.83E+01 Nb-95 <1.08E+01 O.OOE+OO 1.08E+01 1-131 <1.09E+01 O.OOE+OO 1.09E+01 Cs-134 <2.27E+01 O.OOE+OO 2.27E+01 Cs-137 <1.27E+01 O.OOE+OO 1.27E+01 Bala-140 <1.51 E+01 O.OOE+OO 1.51E+01 Be-7 2.15E+03 2.55E+02 1.51E+02 K-40 3.01 E+03 3.75E+02 2.10E+02 Sample ID: 425490 Sample Dates: 10/3/2016 - 10/3/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <3.37E+01 O.OOE+OO 3.37E+01 Co-58 <3.67E+01 O.OOE+OO 3.67E+01 Fe-59 <7.59E+01 O.OOE+OO 7.59E+01 Co-60 <4.35E+01 O.OOE+OO 4.35E+01 Zn-65 <8.53E+01 O.OOE+OO 8.53E+01

@ 4/4/2017 13:40:53 EnRad Laboratories Report Generated Appendix E - Page 82 of 91 Duke Energy Annual Report -Appendix E En=:> 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: VEGETATION Concentration (Activity): pCi/kg wet Sample Point 077 [INDICATOR - SW@ 1 miles ]

Sample ID: 425490 Sample Dates: 10/3/2016 -10/3/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Zr-95 <7.33E+01 O.OOE+OO 7.33E+01 Nb-95 <3.82E+01 O.OOE+OO 3.82E+01 1-131 <3.97E+01 O.OOE+OO 3.97E+01 Cs-134 <4.65E+01 O.OOE+OO 4.65E+01 Cs-137 <4.14E+01 O.OOE+OO 4.14E+01 Bala-140 <4.76E+01 O.OOE+OO 4.76E+01 Be-7 2.75E+03 4.90E+02 3.54E+02 K-40 3.90E+03 7.61E+02 8.38E+01 Sample ID: 428253 Sample Dates: 1117/2016 -11/7/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2.41E+01 O.OOE+OO 2.41E+01 Co-58 <3.22E+01 O.OOE+OO 3.22E+01 Fe-59 <6.11E+01 O.OOE+OO 6.11E+01 Co-60 <2.53E+01 O.OOE+OO 2.53E+01 Zn-65 <5.35E+01 O.OOE+OO 5.35E+01 Zr-95 <4.62E+01 O.OOE+OO 4.62E+01 Nb-95 <2.81E+01 O.OOE+OO 2.81E+01 1-131 <2.76E+01 O.OOE+OO 2.76E+01 Cs-134 <2.86E+01 O.OOE+OO 2.86E+01 Cs-137 <2.71E+01 O.OOE+OO 2.71E+01 Bala-140 <2.90E+01 O.OOE+OO 2.90E+01 Be-7 1.74E+03 3.58E+02 3.36E+02 K-40 2.74E+03 5.85E+02 3.67E+02 Sample ID: 430617 Sample Dates: 12/5/2016 - 12/5/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <3.71E+01 O.OOE+OO 3.71E+01 Co-58 <3.16E+01 O.OOE+OO 3.16E+01 Fe-59 <5.70E+01 O.OOE+OO 5.70E+01 Co-60 <3.33E+01 O.OOE+OO 3.33E+01 Zn-65 <6.33E+01 O.OOE+OO 6.33E+01 Zr-95 <5.97E+01 O.OOE+OO 5.97E+01 Nb-95 <3.08E+01 O.OOE+OO 3.08E+01 1-131 <2.89E+01 O.OOE+OO 2.89E+01 Cs-134 <4.16E+01 O.OOE+OO 4.16E+01 Cs-137 <4.14E+01 O.OOE+OO 4.14E+01 Bala-140 <4.48E+01 O.OOE+OO 4.48E+01 Be-7 1.14E+03 3.08E+02 3.20E+02 K-40 2.65E+03 6.68E+02 6.07E+02 Sample Point 079 [INDICATOR - NE@ 0.56 miles]

Sample ID: 398993 Sample Dates: 115/2016 -1/5/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2.04E+01 O.OOE+OO 2.04E+01 Co-58 <2.03E+01 O.OOE+OO 2.03E+01 Fe-59 <4.86E+01 O.OOE+OO 4.86E+01 Co-60 <3.11E+01 O.OOE+OO 3.11E+01 Zn-65 <4.08E+0.1 O.OOE+OO 4.08E+01 Zr-95 <3.34E+01 O.OOE+OO 3.34E+01 Nb-95 <2.30E+01 O.OOE+OO 2.30E+01 1-131 <1.83E+01 O.OOE+OO 1.83E+01 Cs-134 <2.84E+01 O.OOE+OO 2.84E+01 Cs-137 <1.78E+01 O.OOE+OO 1.78E+01 Bala-140 <2.55E+01 O.OOE+OO 2.55E+01 Be-7 3.65E+03 4.80E+02 2.44E+02 K-40 2.96E+03 5.33E+02 2.31E+02 Sample ID: 401041 Sample Dates: 2/1/2016 - 2/1/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2.73E+01 O.OOE+OO 2.73E+01 Co-58 <2.10E+01 O.OOE+OO 2.10E+01 Fe-59 <5.92E+01 O.OOE+OO 5.92E+01 Co-60 <5.21E+OO O.OOE+OO 5.21E+OO Zn-65 <4.40E+01 O.OOE+OO 4.40E+01 Zr-95 <4.31 E+01 O.OOE+OO 4.31E+01 Nb-95 <1.94E+01 O.OOE+OO 1.94E+01 1-131 <2.80E+01 O.OOE+OO 2.80E+01 Cs-134 <2.08E+01 O.OOE+OO 2.08E+01 Cs-137 <2.64E+01 O.OOE+OO 2.64E+01 Bala-140 <2.88E+01 O.OOE+OO 2.88E+01 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 83 of 91 Duke Energy Annual Report -Appendix E En*~ 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 {Appendix E).

Media Type: VEGETATION Concentration (Activity): pCi/kg wet Sample Point 079 [INDICATOR - NE @ 0.56 miles]

Sample ID: 401041 Sample Dates: 2/1/2016 - 2/1/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Be-7 4.30E+03 5.57E+02 2.93E+02 K-40 3.19E+03 6.10E+02 4.48E+02 Sample ID: 404576 Sample Dates: 3/7/2016 - 3n/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2.67E+01 O.OOE+OO 2.67E+01 Co-58 <1.42E+01 O.OOE+OO 1.42E+01 Fe-59 <2.91E+01 O.OOE+OO 2.91E+01 Co-60 <2.08E+01 O.OOE+OO 2.08E+01 Zn-65 <5.02E+01 O.OOE+OO 5.02E+01 Zr-95 <2.90E+01 O.OOE+OO 2.90E+01 Nb-95 <1.07E+01 O.OOE+OO 1.07E+01 1-131 <2.00E+01 O.OOE+OO 2.00E+01 Cs-134 <2.42E+01 O.OOE+OO 2.42E+01 Cs-137 <2.09E+01 O.OOE+OO 2.09E+01 BaLa-140 <2.14E+01 O.OOE+OO 2.14E+01 Be-7 3.52E+03 4.74E+02 2.66E+02 K-40 3.11E+03 5.58E+02 3.47E+02 Sample ID: 407607 Sample Dates: 4/4/2016 -4/4/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2.61E+01 O.OOE+OO 2.61E+01 Co-58 <1.79E+01 O.OOE+OO 1.79E+01 Fe-59 <2.92E+01 O.OOE+OO 2.92E+01 Co-60 <1.87E+01 O.OOE+OO 1.87E+01 Zn-65 <5.04E+01 O.OOE+OO 5.04E+01 Zr-95 <3.10E+01 O.OOE+OO 3.10E+01 Nb-95 <1.63E+01 O.OOE+OO 1.63E+01 1-131 <1.91 E+01 O.OOE+OO 1.91E+01 Cs-134 <2.33E+01 O.OOE+OO 2.33E+01 Cs-137 <2.18E+01 'O.OOE+OO 2.18E+01 Bala-140 <1.71 E+01 O.OOE+OO 1.71E+01 Be-7 1.09E+03 2.45E+02 2.39E+02 K-40 4.18E+03 6.53E+02 2.99E+02 Sample ID: 410996 Sample Dates: 5/2/2016 -5/2/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2.29E+01 O.OOE+OO 2.29E+01 Co-58 <2.18E+01 O.OOE+OO 2.18E+01 Fe-59 <3.43E+01 O.OOE+OO 3.43E+01 Co-60 <2.77E+01 O.OOE+OO 2.77E+01 Zn-65 <5.09E+01 O.OOE+OO 5.09E+01 Zr-95 <3.05E+01 O.OOE+OO 3.05E+01 Nb-95 <2.42E+01 O.OOE+OO 2.42E+01 1-131 <1.71 E+01 O.OOE+OO 1.71E+01 Cs-134 <1.86E+01 O.OOE+OO 1.86E+01 Cs-137 <2.13E+01 O.OOE+OO 2.13E+01 Bala-140 <2.55E+01 O.OOE+OO 2.55E+01 Be-7 2.31E+02 1.37E+02 1.94E+02 K-40 3.00E+03 5.62E+02 3.48E+02 Sample ID: 413394 Sample Dates: 6/6/2016 -6/6/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2.46E+01 . O.OOE+OO 2.46E+01 Co-58 <2.44E+01 O.OOE+OO 2.44E+01 Fe-59 <4.20E+01 O.OOE+OO 4.20E+01 Co-60 <3.40E+01 O.OOE+OO 3.40E+01 Zn-65 <5.91 E+01 O.OOE+OO 5.91E+01 Zr-95 <4.44E+01 O.OOE+OO 4.44E+01 Nb-95 <2.58E+01 O.OOE+OO 2.58E+01 1-131 <2.12E+01 O.OOE+OO 2.12E+01 Cs-134 <2.76E+01 O.OOE+OO 2.76E+01 Cs-137 <3.12E+01 O.OOE+OO 3.12E+01 Bala-140 <2.14E+01 O.OOE+OO 2.14E+01 Be-7 3.42E+02 2.12E+02 3.16E+02 K-40 3.25E+03 6.14E+02 2.43E+02 Sample ID: 416446 Sample Dates: 7/5/2016 -7/5/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2.31E+01 O.OOE+OO 2.31E+01 Co-58 <2.29E+01 O.OOE+OO 2.29E+01 Fe-59 <3.91E+01 O.OOE+OO 3.91 E+01 Co-60 <2.08E+01 O.OOE+OO 2.08E+01 Zn-65 <4.04E+01 O.OOE+OO 4.04E+01 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 84 of 91 Duke Energy Annual Report -Appendix E En~ 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: VEGETATION Concentration (Activity): pCi/kg wet Sample Ppint 079 [INDICATOR - NE @ 0.56 miles]

Sample ID: 416446 Sample Dates: 7/5/2016 -7/5/2016 MIXED8LV Nuclide Activity 2 Sigma Error MDA Zr-95 <3.41 E+01 O.OOE+OO 3.41E+01 Nb-95 <2.37E+01 O.OOE+OO 2.37E+01 1-131 <2.07E+01 O.OOE+OO 2.07E+01 Cs-134 <2.70E+01 O.OOE+OO 2.70E+01 Cs-137 <1.82E+01 O.OOE+OO 1.82E+01 Bala-140 <2.95E+01 O.OOE+OO 2.95E+01 Be-7 1.01 E+03 2.40E+02 2.32E+02 K-40 3.33E+03 6.32E+02 4.81E+02 Sample ID: 418319 Sample Dates: 8/1/2016 - 8/1/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <3.19E+01 O.OOE+OO 3.19E+01 Co-58 <2.62E+01 O.OOE+OO 2.62E+01 Fe-59 <4.76E+01 0.00E+OO 4.76E+01

. Co-60 <2.76E+01 O.OOE+OO 2.76E+01 Zn-65 <5.85E+01 O.OOE+OO 5.85E+01 Zr-95 <5.03E+01 O.OOE+OO 5.03E+01 Nb-95 <2.92E+01 O.OOE+OO 2.92E+01 1-131 <3.03E+01 O.OOE+OO 3.03E+01 Cs-134 <4.65E+01 O.OOE+OO 4.65E+01 Cs-137 <3.74E+01 O.OOE+OO 3.74E+01 Bala-140 <3.51E+01 O.OOE+OO 3.51E+01 Be-7 1.36E+03 3.20E+02 3.11E+02 K-40 2.95E+03 6.40E+02 4.44E+02 Sample ID: 421476 Sample Dates: 9/6/2016 -9/6/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2.55E+01 O.OOE+OO 2.55E+01 Co-58 <2.21 E+01 O.OOE+OO 2.21E+01 Fe-59 <4.40E+01 O.OOE+OO 4.40E+01 Co-60 <2.36E+01 O.OOE+OO 2.36E+01 Zn-65 <4.95E+01 O.OOE+OO 4.95E+01 Zr-95 <3.96E+01 O.OOE+OO 3.96E+01 Nb-95 <2.12E+01 O.OOE+OO 2.12E+01 1-131 <1.77E+01 O.OOE+OO 1.77E+01 Cs-134 <2.94E+01 O.OOE+OO 2.94E+01 Cs-137 <2.24E+01 O.OOE+OO 2.24E+01 Bala-140 <2.75E+01 O.OOE+OO 2.75E+01 Be-7 2.28E+03 3.73E+02 3.05E+02 K-40 2.05E+03 4.59E+02 3.52E+02 Sample ID: 425491 Sample Dates: 10/3/2016 - 10/3/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2.52E+01 O.OOE+OO 2.52E+01 Co-58 <3.12E+01 O.OOE+OO 3.12E+01 Fe-59 <6.21E+01 O.OOE+OO 6.21E+01 Co-60 <3.30E+01 O.OOE+OO 3.30E+01 Zn-65 <9.27E+01 O.OOE+OO 9.27E+01 Zr-95 <6.00E+01 O.OOE+OO 6.00E+01 Nb-95 <3.90E+01 O.OOE+OO 3.90E+01 1-131 <2.86E+01 O.OOE+OO 2.86E+01 Cs-134 <3.74E+01 O.OOE+OO 3.74E+01 Cs-137 <2.45E+01 O.OOE+oo 2.45E+01 Bala-140 <4.73E+01 O.OOE+OO 4.73E+01 Be-7 9.47E+02 3.07E+02 3.55E+02 K-40 3.03E+03 6.81E+02 3.68E+02 Sample ID: 428254 Sample Dates: 11/7/2016 -11/7/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <3.82E+01 O.OOE+OO 3.82E+01 Co-58 <3.54E+01 O.OOE+OO 3.54E+01 Fe-59 <6.28E+01 O.OOE+OO 6.28E+01 Co-60 <3.07E+01 O.OOE+OO 3.07E+01 Zn-65 <5.97E+01 O.OOE+OO 5.97E+01 Zr-95 <7.21 E+01 O.OOE+OO 7.21E+01 Nb-95 <3.30E+01 O.OOE+OO 3.30E+01 1-131 <2.80E+01 O.OOE+OO 2.80E+01 Cs-134 <3.30E+01 O.OOE+OO 3.30E+01 Cs-137 <2.49E+01 O.OOE+OO 2.49E+01 Bala-140 <3.50E+01 O.OOE+OO 3.50E+01 Be-7 8.68E+02 2.77E+02 3.10E+02 K-40 3.66E+03 7.73E+02 5.83E+02

@ 4/4/2017 13:40:53 EnRad Laboratories Report Generated Appendix E - Page 85 of 91 Duke Energy Annual Report -Appendix E En~ 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: VEGETATION Concentration (Activity): pCi/kg wet Sample Point 079 [INDICATOR - NE@ 0.56 miles]

Sample ID: 430618 Sample Dates: 12/5/2016 -12/5/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2.19E+01 O.OOE+OO 2.19E+01 Co-58 <3.42E+01 O.OOE+OO 3.42E+01 Fe-59 <5.85E+01 O.OOE+OO 5.85E+01 Co-60 <2.46E+01 O.OOE+OO 2.46E+01 Zn-65 <6.51E+01 O.OOE+OO 6.51E+01 Zr-95 <5.00E+01 O.OOE+OO 5.00E+01 Nb-95 <3.08E+01 O.OOE+OO 3.08E+01 1-131 <3.63E+01 O.OOE+OO 3.63E+01 Cs-134 <3.56E+01 O.OOE+OO 3.56E+01 Cs-137 <4.15E+01 O.OOE+OO 4.15E+01 Bala-140 <4.64E+01 O.OOE+OO 4.64E+01 Be-7 1.91 E+03 3.78E+02 3.06E+02 K-40 3.49E+03 6.9BE+02 3.99E+02 Sample Point 081 [CONTROL - SE@ 9.33 miles]

Sample JD: 398994 Sample Dates: 1/5/2016 -1/5/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2.70E+01 O.OOE+OO 2.70E+01 Co-58 <2.39E+01 O.OOE+OO 2.39E+01 Fe-59 <4.91 E+01 O.OOE+OO 4.91E+01 Co-60 <2.73E+01 O.OOE+OO 2.73E+01 Zn-65 <6.06E+01 O.OOE+OO 6.06E+01 Zr-95 <5.05E+01 O.OOE+OO 5.05E+01 Nb-95 <2.62E+01 O.OOE+OO 2.62E+01 1-131 <2.96E+01 O.OOE+OO 2.96E+01 Cs-134 <2.92E+01 O.OOE+OO 2.92E+01 Cs-137 <2.BOE+01 O.OOE+OO 2.80E+01 Bala-140 <2.07E+01 O.OOE+OO 2.07E+01 Be-7 1.96E+03 3.69E+02 3.34E+o2 K-40 3.28E+03 5.98E+02 2.46E+02 Sample ID: 401042 Sample Dates: 2/1/2016 -2/1/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2.46E+01 O.OOE+OO 2.46E+01 Co-58 <2.62E+01 O.OOE+OO 2.62E+01 Fe-59 <4.31E+01 O.OOE+OO 4.31E+01 Co-60 <2.35E+01 O.OOE+OO 2.35E+01 Zn-65 <6.22E+01 O.OOE+OO 6.22E+01 Zr-95 <5.28E+01 O.OOE+OO 5.28E+01 Nb-95 <3.22E+01 O.OOE+OO 3.22E+01 1-131 <3.00E+01 O.OOE+OO 3.00E+01 Cs-134 <4.69E+01 O.OOE+OO 4.69E+01 Cs-137 <2.81E+01 O.OOE+OO 2.81E+01 Bala-140 <9.59E+OO O.OOE+OO 9.59E+OO Be-7 1.40E+03 3.49E+02 3.75E+02 K-40 2.92E+03 6.30E+02 4.20E+02

. Sample ID: 404577 Sample Dates: 3/7/2016 -3/7/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <1.56E+01 O.OOE+OO 1.56E+01 Co-58 <1.43E+01 O.OOE+OO 1.43E+01 Fe-59 <4.75E+01 O.OOE+OO 4.75E+01 Co-60 <2.61E+01 O.OOE+OO 2.61E+01 Zn-65 <5.28E+01 O.OOE+OO 5.28E+01 Zr-95 <4.14E+01 O.OOE+OO 4.14E+01 Nb-95 <2.09E+01 O.OOE+OO 2.09E+01 1-131 <1.91 E+01 O.OOE+OO 1.91E+01 Cs-134 <2.69E+01 O.OOE+OO 2.69E+01 Cs-137 <2.17E+01 O.OOE+OO 2.17E+01 Bala-140 <2.51E+01 O.OOE+OO 2.51E+01 Be-7 1.64E+03 2.94E+02 2.34E+02 K-40 2.74E+03 4.92E+02 4.73E+01 Sample JD: 407608 Sample Dates: 4/4/2016 - 4/4/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <3.07E+01 O.OOE+OO 3.07E+01 Co-58 <2.79E+01 O.OOE+OO 2.79E+01 Fe-59 <4.84E+01 O.OOE+OO 4.84E+01 Co-60 <3.36E+01 O.OOE+OO 3.36E+01 Zn-65 <7.79E+01 O.OOE+OO 7.79E+01 Zr-95 <4.84E+01 O.OOE+OO 4.84E+01 EnRad Laboratories Report Generated @ 4/4/2017 13:40:53 Appendix E - Page 86 of 91 Duke Energy Annual Report -Appendix E En~ 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (App.endix E)

Media Type: VEGETATION Concentration (Activity): pCi/kg wet Sample Point 081 [CONTROL - SE @*9.33 miles]

Sample ID: 407608 Sample Dates: 4/4/2016 -4/4/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Nb-95 <2.98E+01 O.OOE+OO 2.98E+01 1-131 <2.51E+01 O.OOE+OO 2.51E+01 Cs-134 <4.10E+01 O.OOE+OO 4.10E+01 Cs-137 <3.33E+01 O.OOE+OO 3.33E+01 Bala-140 <3.72E+01 O.OOE+OO 3.72E+01 Be-7 1.31E+03 3.11E+02 2.95E+02 K-40 5.34E+03 8.54E+02 6.96E+01 Sample ID: 410997 . Sample Dates: 5/2/2016 - 5/2/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <1.89E+01 O.OOE+OO 1.89E+01 Co-58 <1.95E+01 0.00E+OO 1.95E+01 Fe-59 <4.60E+01 O.OOE+OO 4.60E+01 Co-60 <1.89E+01 O.OOE+OO 1.89E+01 Zn-65 <3.30E+01 O.OOE+OO 3.30E+01 Zr-95 <3.74E+01 O.OOE+OO 3.74E+01 Nb-95 <1.80E+01 O.OOE+OO 1.80E+01 1-131 <1.48E+01 O.OOE+OO 1.48E+01 Cs-134 <1.93E+01 O.OOE+OO 1.93E+01 Cs-137 <2.24E+01 O.OOE+OO 2.24E+01 Bala-140 <1.49E+01 O.OOE+OO 1.49E+01 Be-7 3.85E+02 1.51E+02 1.94E+02 K-40 2.66E+03 4.67E+02 1.68E+02 Sample ID: 413395 Sample Dates: 6/6/2016 -6/6/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <1.69E+01 O.OOE+OO 1.69E+01 Co-58 <1.57E+01 O.OOE+OO 1.57E+01 Fe-59 <3.06E+01 O.OOE+OO 3.06E+01 Co-60 <1.77E+01 0.00E+OO 1.77E+01 Zn-65 <5.19E+01 O.OOE+OO 5.19E+01 1 Zr-95 <4.12E+01 O.OOE+OO 4.12E+Oi Nb-95 <2.47E+01 O.OOE+OO 2.47E+01 1-131 <1.80E+01 O.OOE+OO 1.80E+01 Cs-134 <2.46E+01 O.OOE+OO 2.46E+01 Cs-137 <2.68E+01 O.OOE+OO 2.68E+01 Bala-140 <2.55E+01 O.OOE+OO 2.55E+01 Be-7 4.50E+02 1.75E+02 2.31E+02 K-40 3.17E+03 5.53E+02 3.25E+02 Sample ID: 416447 Sample Dates: 7/5/2016 - 7/5/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2.50E+01 O.OOE+OO 2.50E+01 Co-58 <2.47E+01 0.00E+OO 2.47E+01 Fe-59 <5.08E+01 O.OOE+OO 5.08E+01 Co-60 <2.63E+01 O.OOE+OO 2.63E+01 Zn-65 <5.37E+01 O.OOE+OO 5.37E+01 Zr-95 <4.07E+01 O.OOE+OO 4.07E+01 Nb-95 <2.69E+01 O.OOE+OO 2.69E+01 1-131 <1.87E+01 O.OOE+OO 1.87E+01 Cs-134 <3.05E+01 O.OOE+OO 3.05E+01 Cs-137 <2.73E+01 O.OOE+OO 2.73E+01 Bala-140 <3.02E+01 O.OOE+OO 3.02E+01 Be-7 6.53E+02 2.60E+02 3.55E+02 K-40 3.56E+03 7.41E+02 7.00E+02 Sample ID: 418320 Sample Dates: 8/1/2016 -8/1/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <1.90E+01 O.OOE+OO 1.90E+01 Co-58 <1.99E+01 O.OOE+OO 1.99E+01 Fe-59 <4.97E+01 O.OOE+OO 4.97E+01 Co-60 <2.93E+01 O.OOE+OO 2.93E+01 Zn-65 <4.81E+01 O.OOE+OO 4.81E+01 Zr-95 <2.84E+01 O.OOE+OO 2.84E+01 Nb-95 <2.10E+01 O.OOE+OO 2.10E+01 1-131 <1.72E+01 O.OOE+OO 1.72E+01 Cs-134 <2.67E+01 O.OOE+OO 2.67E+01 Cs-137 <2.82E+01 O.OOE+OO 2.82E+01 Bala-140 <2.84E+01 O.OOE+OO 2.84E+01 Be-7 1.34E+03 2.99E+02 3.21E+02 K-40 4.70E+03 7.09E+02 2.04E+02 EnRad Laboratories Report Generated @ 4/4/2017 13:40:53 Appendix E - Page 87 of 91 Duke Energy Annual Report -Appendix E

En:> 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: VEGETATION Concentration (Activity): pCi/kg wet Sample Point 081 [CONTROL - SE@ 9.33 miles f Sample ID: 421477

Sample Dates: 9/6/2016 - 9/6/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2.09E+01 O.OOE+OO 2.09E+01 Co-58 <1.98E+01 O.OOE+OO 1.98E+01 Fe-59 <5.60E+01 O.OOE+OO 5.60E+01 Co-60 <1.29E+01 O.OOE+OO 1.29E+01 Zn-65 <2.24E+01 O.OOE+OO 2.24E+01 Zr-95 <4.00E+01 O.OOE+OO 4.00E+01 Nb-95 <2.57E+01 O.OOE+OO 2.57E+01 1-131 <1.89E+01 O.OOE+OO 1.89E+01 Cs-134 <2.02E+01 0.00E+OO 2.02E+01 Cs-137 <1.85E+01 O.OOE+OO 1.85E+01 Bala-140 <6.07E+OO O.OOE+OO 6.07E+OO Be-7 1.04E+03 2.41E+02 2.43E+02 K-40 5.25E+03 7.78E+02 4.37E+02 Sample ID: 425492 Sample Dates: 10/3/2016 - 10/3/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2.71E+01 O.OOE+OO 2.71E+01 Co-58 <1.94E+01 O.OOE+OO 1.94E+01 Fe-59 <5.24E+01 O.OOE+OO 5.24E+01 Co-60 <2.44E+01 O.OOE+OO 2.44E+01 Zn-65 <4.24E+01 O.OOE+OO 4.24E+01 Zr-95 <4.15E+01 O.OOE+OO 4.15E+01 Nb-95 <2.31E+01 O.OOE+OO 2.31E+01 1-131 <2.44E+01 O.OOE+OO 2.44E+D1 Cs-134 <3.13E+D1 O.OOE+OO 3.13E+01 Cs-137 <2.44E+01 O.OOE+OO 2.44E+01 Bala-140 <3.15E+01 O.OOE+OO 3.15E+01 Be-7 1.22E+D3 2.7DE+02 2.52E+02 K-40 5.13E+03 8.58E+02 6.79E+02 Sample ID: 428255 Sample Dates: 11/7/2016 -11/7/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <3.61E+01 O.OOE+OO 3.61 E+01 Co-58 <3.04E+01 O.OOE+OO 3.04E+01 Fe-59 <7.82E+01 O.OOE+OO 7.82E+01 Co-60 <3.39E+01 O.OOE+OO 3.39E+01 Zn-65 <7.19E+01 O.OOE+OO 7.19E+01 Zr-95 <7.04E+01 O.OOE+OO 7.04E+01 Nb-95 <3.49E+01 O.OOE+OO 3.49E+01 1-131 <2.92E+01 O.OOE+OO 2.92E+01 Cs-134 <4.05E+01 O.OOE+OO 4.05E+01 Cs-137 <3.81E+01 O.OOE+OO 3.81E+01 Bala-140 <3.92E+01 O.OOE+OO 3.92E+01 Be-7 1.15E+03 3.64E+02 4.39E+02 K-40 3.44E+03 7.34E+02 3.61E+02 Sample ID: 430619 Sample Dates: 12/5/2016 -12/5/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <3.05E+01 O.OOE+OO 3.05E+01 Co-58 <2.13E+01 O.OOE+OO 2.13E+01 Fe-59 <4.17E+01 O.OOE+OO 4.17E+01 Co-60 <2.38E+01 O.OOE+OO 2.38E+01 Zn-65 <6.12E+01 O.OOE+OO 6.12E+01 Zr-95 <4.36E+01 O.ODE+OO 4.36E+01 Nb-95 <2.07E+01 O.OOE+OO 2.07E+01 1-131 <2.84E+01 O.OOE+OO 2.84E+01 Cs-134 <3.20E+01 O.OOE+OO 3.20E+01 Cs-137 <2.66E+01 O.OOE+OO 2.66E+01 Bala-140 <3.91E+01 O.OOE+OO 3.91E+01 Be-7 1.16E+03 3.16E+02 3.77E+02 K-40 3.61E+03 6.62E+02 3.48E+02 Sample Point 084 [INDICATOR - NNE @ 2.58 miles]

Sample ID: 398995 Sample Dates: 1/5/2016 -1/5/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2.19E+01 O.OOE+OO 2.19E+01 Co-58 <1.BBE+01 O.OOE+OO 1.BBE+01 Fe-59 <3.45E+01 O.OOE+OO 3.45E+01 Co-60 <3.06E+01 O.OOE+OO 3.06E+01 Zn-65 <4.50E+01 O.OOE+OO 4.50E+01 Zr-95 <3.26E+o1* O.OOE+OO 3.26E+01 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 88 of 91 Duke Energy Annual Report -Appendix E

EnJ) 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: VEGETATION Concentration (Activity): pCi/kg wet Sample Point 084 [INDICATOR - NNE @ 2.58 miles]

Sample ID: 398995 Sample Dates: 1/5/2016 -1/5/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Nb-95 <2.29E+01 O.OOE+OO 2.29E+01 1-131 <2.29E+01 O.OOE+OO 2.29E+01 Cs-134 <2.55E+01 O.OOE+OO 2.55E+01 Cs-137 <2.02E+01 O.OOE+OO 2.02E+01 Bala-140 <2.96E+01 O.OOE+OO 2.96E+01 Be-7 8.12E+03 8.78E+02 2.35E+02 K-40 3.18E+03 5.50E+02 4.99E+01 Sample ID: 401043 Sample Dates: 2/1/2016 c.2/1/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2.46E+01 O.OOE+OO 2.46E+01 Co-58 <2.67E+01 O.OOE+OO 2.67E+01 Fe-59 <5.92E+01 O.OOE+OO 5.92E+01 Co-60 <2.90E+01 O.OOE+OO 2.90E+01 Zn-65 <5.39E+01 O.OOE+OO 5.39E+01 Zr-95 <3.89E+01 O.OOE+OO 3.89E+01 Nb-95 <2.20E+01 O.OOE+OO 2.20E+01 1-131 <2.62E+01 O.OOE+OO 2.63E+01 Cs-134 <3.08E+01 O.OOE+OO 3.08E+01 Cs-137 <2.47E+01 O.OOE+OO 2.47E+01 Bala-140 <2.68E+01 O.OOE+OO 2.68E+01 Be-7 5.50E+03 6.73E+02 2.96E+02 K-40 3.37E+03 5.95E+02 5.60E+01 Sample ID: 404578 Sample Dates: 3/7/2016 - 3/7/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <9.96E+OO O.OOE+OO 9.96E+OO Co-58 <8.99E+OO O.OOE+OO 8.99E+OO Fe-59 <1.70E+01 O.OOE+OO 1.70E+01 Co-60 <1.01 E+01 O.OOE+OO 1.01E+01

'Zn-65 <2.31 E+01 O.OOE+OO 2.31E+01 Zr-95 <1.66E+01 O.OOE+OO 1.66E+01 Nb-95 <1.04E+01 O.OOE+OO 1.04E+01 1-131 <1.11 E+01 O.OOE+OO 1.11E+01 Cs-134 <1.07E+01 O.OOE+OO 1.07E+01 Cs-137 <1.07E+01 O.OOE+OO 1.07E+01 Bala-140 <1.30E+01 O.OOE+OO 1.30E+01 Be-7 6.21E+03 6.71E+02 8.81E+01 K-40 3.09E+03 3.44E+02 1.05E+02 Sample ID: 407609 Sample Dates: 4/4/2016 -4/4/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <1.94E+D1 O.OOE+OO 1.94E+01 Co-58 <1.76E+01 O.OOE+OO 1.76E+01 Fe-59 <2.36E+01 O.OOE+OO 2.36E+01 Co-60 <2.44E+01 O.OOE+OO 2.44E+01 Zn-65 <3.99E+01 O.OOE+OO 3.99E+01 Zr-95 <3.35E+01 O.OOE+OO 3.35E+01 Nb-95 <1.71E+01 O.OOE+OO 1.71E+01 1-131 <1.64E+01 O.OOE+OO 1.64E+01 Cs-134 <1.87E+01 O.OOE+OO 1.87E+01 Cs-137 <2.10E+01 O.OOE+OO 2.10E+01 Bala-140 <1.61E+01 O.OOE+OO 1.61E+01 Be-7 2.78E+03 3.89E+02 2.24E+02 K-40 4.30E+03 6.36E+02 4.42E+01 Sample ID: 410998 Sample Dates: 5/2/2016

5/2/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2.51 E+01 O.OOE+OO 2.51E+01 Co-58 <3.00E+01 O.OOE+OO 3.00E+01 Fe-59 <6.27E+01 O.OOE+OO 6.27E+01 Co-60 <2.91E+01 O.OOE+OO 2.91E+01 Zn-65 <5.08E+01 O.OOE+OO 5.0BE+01 Zr-95 <4.30E+01 O.OOE+OO 4.30E+01 Nb-95 <2.66E+01 O.OOE+OO 2.66E+01 1-131 <2.55E+01 O.OOE+OO 2.55E+01 Cs-134 <2.98E+01 . O.OOE+OO 2.98E+01 Cs-137 <3.55E+01 O.OOE+OO 3.55E+01 Bala-140 <3.73E+01 O.OOE+OO 3.73E+01 Be-7 <2.89E+02 O.OOE+OO 2.89E+02 K-40 2.97E+03 6.56E+02 5.48E+02 Report Generated @ 4/4/2017 13:40:53 EnRad Laboratories Appendix E - Page 89 of 91 Duke Energy Annual Report -Appendix E En:=> 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2016 (Appendix E)

Media Type: VEGETATION Concentration (Activity): pCi/kg wet Sample Point 084 [INDICATOR - NNE @ 2.58 miles]

Sample ID: 413396 Sample Dates: 6/6/2016 ~ 6/6/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <3.33E+01 O.OOE+OO 3.33E+01 Co-58 <2.67E+01 0.00E+OO 2.67E+01 Fe-59 <6.08E+01 O.OOE+OO 6.08E+01 Co-60 <2.58E+01 O.OOE+OO 2.58E+01 Zn-65 <6.83E+01 O.OOE+OO 6.83E+01 Zr-95 <5.47E+01 O.OOE+OO 5.47E+01 Nb-95 <3.56E+01 0.00E+OO 3.56E+01 1-131 <2.61E+01 O.OOE+OO 2.61E+01 Cs-134 <3.03E+01 O.OOE+OO 3.03E+01 Cs-137 <3.09E+01 O.OOE+OO 3.09E+01 Bala-140 <9.68E+OO O.OOE+OO 9.68E+OO Be-7 1.38E+03 3.42E+02 3.49E+02 K-40 3.34E+03 7.10E+02 4.85E+02 Sample ID: 416448 Sample Dates: 7/5/2016-7/5/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2.34E+01 O.OOE+OO 2.34E+01 Co-58 <2.79E+01 O.OOE+OO 2.79E+01 Fe-59 <5.50E+01 O.OOE+OO 5.50E+01 Co-60 <2.45E+01 O.OOE+OO 2.45E+01 Zn-65 <3.83E+01 O.OOE+OO 3.83E+01 Zr-95 <4.01 E+01 O.OOE+OO 4.01E+01 Nb-95 <2.60E+01 O.OOE+OO 2.60E+01 1-131 <1.95E+01 O.OOE+OO 1.95E+01 Cs-134 <2.63E+01 O.OOE+OO 2.63E+01 Cs-137 <3.06E+01 O.OOE+OO 3.06E+01 Bala-140 <2.80E+01 O.OOE+OO 2.80E+01 Be-7 1.04E+03 2.36E+02 1.97E+02 K-40 3<'13E+03 5.65E+02 5.55E+01 Sample ID: 418321 Sample Dates: 8/1 /2016 - 8/1 /2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <3.23E+01 O.OOE+OO 3.23E+01 Co-58 <2.52E+01 O.OOE+OO 2.52E+01 Fe-59 <4.75E+01 O.OOE+OO 4.75E+01 Co-60 <3.08E+01 O.OOE+OO 3.08E+01 Zn-65 <7.94E+01 O.OOE+OO 7.94E+01 Zr-95 <3.60E+01 O.OOE+OO 3.60E+01 Nb-95 <2.66E+01 O.OOE+OO 2.66E+01 1-131 <2.46E+01 0.00E+OO 2.46E+01 Cs-134 <3.84E+01 O.OOE+OO 3.84E+01 Cs-137 <3.22E+01 O.OOE+OO 3.22E+01 Bala-140 <2.79E+01 O.OOE+OO 2.79E+01 Be-7 7.52E+02 2.31E+02 2.55E+02 K-40 1.67E+03 5.07E+02 5.33E+02 Sample ID: 421478 Sample Dates: 9/6/2016 -9/6/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <3.52E+01 O.OOE+OO 3.52E+01 Co-58 <3.03E+01 O.OOE+OO 3.03E+01 Fe-59 <3.80E+01 O.OOE+OO 3.80E+01 Co-60 <3.22E+01 O.OOE+OO 3.22E+01 Zn-65 <5.61E+01 O.OOE+OO 5.61E+01 Zr-95 <4.48E+01 O.OOE+OO 4.48E+01 Nb-95 <2.82E+01 O.OOE+OO 2.82E+01 1-131 <2.59E+01 O.OOE+OO 2.59E+01 Cs-134 <3.86E+01 O.OOE+OO 3.86E+01 Cs-137 <3.16E+.01 O.OOE+OO 3.16E+01 Bala-140 <4.11E+01 O.OOE+OO 4.11E+01 Be-7 1.87E+03 3.71E+02 3.52E+02 K-40 3.30E+03 6.38E+02 3.74E+02 Sample ID: 425493 Sample Dates: 10/3/2016 -10/3/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <1.98E+01 O.OOE+OO 1.98E+01 Co-58 <2.09E+01 0.00E+OO 2.09E+01 Fe-59 <4.02E+01 O.OOE+OO 4.02E+01 Co-60 <1.91 E+01 O.OOE+OO 1.91E+01 Zn-65 <4.21E+01 O.OOE+OO 4.21E+01 Zr-95 <3.84E+01 O.OOE+OO 3.84E+01 Nb-95. <2.14E+01 O.OOE+OO 2.14E+01 1-131 <3.17E+01 O.OOE+OO 3.17E+01 EnRad Laboratories Report Generated @ 4/4/2017 13:40:53 Appendix E - Page 90 of 91 Duke Energy Annual Report -Appendix E En~ 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report- 2016 (Appendix E)

Media Type: VEGETATION Concentration (Activity): pCi/kg wet Sample Point 084 [INDICATOR - NNE @ 2.58 miles]

Sample ID: 425493 Sample Dates: 10/3/2016 -10/3/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Cs-134 <2.67E+01 O.OOE+OO 2.67E+01 Cs-137 <2.23E+01 O.OOE+OO 2.23E+01 Bala-140 <2.52E+01 O.OOE+OO 2.52E+01 Be-7 1.81E+03 2.44E+02 1.81E+02 K-40 3.49E+03 4.86E+02 2.86E+02 Sample ID: 428256 Sample Dates: 1117/2016 -11/7/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <3.40E+01 O.OOE+OO 3.40E+01 Co-58 <3.39E+01 O.OOE+OO 3.39E+01 Fe-59 <8.33E+01 O.OOE+OO 8.33E+01 Co-60 <3.51 E+01 O.OOE+OO 3.51E+01 Zn-65 <9.28E+01 O.OOE+OO 9.28E+01 Zr-95 <5.87E+01 O.OOE+OO 5.87E+01 Nb-95 <4.37E+01 O.OOE+OO 4.37E+01 1-131 <4.13E+01 O.OOE+OO 4.13E+01 Cs-134 <4.62E+01 O.OOE+OO 4.62E+01 Cs-137 <5.78E+01 0.00E+OO 5.78E+01 Bala-140 <6.61E+01 O.OOE+OO 6.61E+01 Be-7 9.36E+02 3.62E+02 4.58E+02 K-40 2.62E+03 6.65E+02 1.03E+02 Sample ID: 430620 Sample Dates: 12/5/2016 - 12/5/2016 MIXEDBLV Nuclide Activity 2 Sigma Error MDA Mn-54 <2.59E+01 O.OOE+OO 2.59E+01 Co-58 <2.09E+01 O.OOE+OO 2.09E+01 Fe-59 <3.16E+01 O.OOE+OO 3.16E+01 Co-60 <2.85E+01 O.OOE+OO 2.85E+01 Zn-65 <4.54E+01 O.OOE+OO 4.55E+01 Zr-95 <3.86E+01 O.OOE+OO 3.86E+01 Nb-95 <1.89E+01 O.OOE+OO 1.89E+01 1-131 <2.78E+01 O.OOE+OO 2.78E+01 Cs-134 <2.51E+01 O.OOE+OO 2.51E+01 Cs-137 <2.51E+01 O.OOE+OO 2.51E+01 Bala-140 <2.15E+D1 O.OOE+OO 2.15E+01 Be-7 3.11E+03 4.60E+02 2.68E+02 K-40 2.52E+03 5.30E+02 2.80E+02

@ 4/4/2017 13:40:53 EnRad Laboratories Report Generated Appendix E - Page 91 of 91 Duke Energy Annual Report -Appendix E En=:> 13339 Hagers Ferry Road Huntersville, North Carolina 28078

APPENDIXF ERRATA TO PREVIOUS REPORTS Appendix F - Page l

APPENDIXF ERRATA TO THE 2016 AREOR Oconee AREOR: 2008 During a 2016 NOS audit, it was identified that some samples processed by the EnRad laboratory using the APEX gamma counting geometry 025LMAR310 did not have the required a priori lower limit of detection (LLD) calculated prior to performing the analysis.

An a posteriori LLD was calculated and all required lower limit of detections were satisfied (NCR# 02021801 ). The failure to calculate the a priori LLD prior to performing the analysis is an Analytical Deviation.

EnRad performed an extent of condition to assess which samples had been processed using the 025LMAR310 geometry. The Sample Manager database was evaluated for any references to the 025LMAR3 l 0 geometry and its various alternate historical names. Oconee broadleaf vegetation indicator lo~ation 084 w?s determined to have been impacted (NCR# 02042799).

Oconee broadleaf vegetation indicator location was located in the NNE sector at 2.58 miles (Sue Craig Road). The impacted sample was assigned Sample Manager ID # 93197 (Lab Manager LM3_28001026) for collection period 3MAR2008. Gamma analysis results and the a posteriori LLDs were reviewed and the analysis was determined valid.

The a posteriori LLD satisfied the requirements of Oconee Selected Licensee Commitments (SLC) 16.11 RADIOLOGICAL EFFLUENTS CONTROLS, 16.11.6 Radiological Environmental Monitoring, Table 16.11.6-2 (Maximum values for the Lower Limits of Detection (LLD)). While the a priori lower limits of detection (LLD) were not calculated prior to perfmming the analysis, all analytical results for this sample were valid. There were no collection discrepancies identified with this sample.

Oconee AREOR: 2014, 2015 During a 2016 Dosimetry Laboratory peer assessment, it was discovered the 2014 and 2015 (all quarters) internal environmental TLD crosschecks were not completed in accordance with procedure RD/O/B/4000/13, Environmental Monitoring (NCR # 02073609). Environmental monitoring is not National Voluntary Laboratory Accreditation Program (NVLAP) accredited, but the internal crosscheck data was reported to the NRC in the 2014 and 2015 AREORs.

External environmental TLD crosschecks were performed during 2014 and 2015 in accordance with procedure RD/O/B/4000/13, Environmental Monitoring, therefore environmental TLD QA/QC was perfonned.

Laboratory TLD data supporting the 2014 and 2015 internal environmental TLD crosscheck result tables could not be located during the 2016 assessment. The internal environmental crosscheck (Duke Energy) table indicated in the quality assurance section of the 2014 and Appendix F - Page 2

2015 i*eports is therefore not consi.dered acceptable and is reinoved from the 2014 and 2015 reports. The internal environmental TLD crosscheck data were not presented in the 2016 AREOR and were removed from the quality assurance section in entirety.

Oconee AREOR: 2015 During a 2016. NRC audit, it was determined the ISCO water sampling device at drinking water location 066 (Anderson Municipal Water Supply) operated one day beyond the calibration due date (NCR# 02036714). The calibration due date for the ISCO water sampler (EnRad ID# 00278) located and operating at Oconee REMP drinking water location 066 on 5/28/2015 was 5/27/2015. The ISCO sampler was not calibrated until 5/28/2015, therefore the ISCO sampler was out of calibration for one day during the collection period of 5/26/2015 to 6/22/2015. Location 066 is an indicator drinking water location and is located in the SSE sector at 18.9 miles.

Oconee AREOR: 2015 The 2015 appendix E "Radiological Environmental Monitoring Program Results" summary did not display the gross beta test component (Nuclide) for sample number 384918 in the 2015 report execution. The result was from ~rinking water location 064 (SSW sector at 6.67 miles (Seneca Drinking Water))' for monitori11g period 7/20/2015-8/17/2015. The gross beta result for sample number 3 87918 was determined present in the database. Sample number 387918 gross beta result 9.31E-01 +/- 7.07E-Ol pCi/l was included in the 2015 Appendix B "Radiological Environmental Monitoring Program Data Summary" and was included as one of the thitieen 2015 drinking water control location gross beta test results indicated. The amended 2015 report for sample 387918 is indicated below.

OCONEE Radiological Environmental Monitoring Analysis Report - 2015 (Appendix E)

Media Type: DRINKING WATER Concentration (ActMty): pCUI Sample Point 064 [CONTROL* SSW@ 6.67 miles J Sample IC: 384918 Sample Cales: 712012015 - 8/1712015 Nuclide Acciviry Z Sigma Error MOA e:er.J 9.31E*OI 7.07E-01 1.16E*OO Mn-54 <2.46E*OO O.OOE+OO 2.46E*CO Co-5a <2.76E+Ci0 O.OOE+OO 2.76E+OO Fo-59 <5.81E+OO O.OOE*OO 5 61E*OO Co-BO <2,73E+OO O.OOE+OO 2..73E*OO Zo-65 <S.SS-E+OO O.OOE+OO 5.59E+O-O Zr*9S <5.0SE*OO O.OOE+OO 5 OSE*OO Nb-95 <2.75E*OO O.OOE+OO :?.75E+Cil r.13i <1 13E+Ot O.OOE+OO l.13E*01 Cs-134 <2.82E*OO O.OOE*OO 282E*OO Cs,137 <2.9.JE+OO O.OOE+OO 2.9-tE*lJ-0 eaLa-140 -::s. 14E+OO O.OOE+OO a.t*E*O-O 91!"-7 .t::2.69E+Ot O.OOE+OO 2.S.9E+01 K-lD 1.06E+01 1.97E+01 J.40E*01 Appendix F - Page 3

ONS-2017-037, 2016 Annual Radiological Environmental Operating Report

Contents

Text

Subject:

SUMMARY

2.0 INTRODUCTION

SUMMARY

SUMMARY

SUMMARY

Navigation menu

ONS-2017-037, 2016 Annual Radiological Environmental Operating Report

Text

Subject:

SUMMARY

2.0 INTRODUCTION

SUMMARY

SUMMARY

SUMMARY

Navigation menu

Search