Text

2014 Annual Radiological Environmental Operating Report
	ML15146A364
Person / Time
Site:	Oconee
Issue date:	05/15/2015
From:	Batson S; Duke Energy Carolinas
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
Shared Package
ML15146A365	List: ML15146A306; ONS-2015-059, 2014 Annual Radiological Environmental Operating Report; ONS-2015-059, Oconee, Units 1, 2 and 3 - Transmittal of 2014 Annual Radiological Environmental Operating Report;
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	ONS-2015-059
	Download: ML15146A364 (168)
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ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT DUKE ENERGY CORPORATION OCONEE NUCLEAR STATION Units 1, 2, and 3 2014

TABLE OF CONTENTS 1.0 Executive Summary . . . . . . . . . . . . 1-1 2.0 Introduction . . . . . . . . . . . . . 2-1 2.1 Site Description and Sample Locations . . . . . . . 2-1 2.2 Scope and Requirements of the REMP . . . . . . . 2-1 2.3 Statistical and Calculational Methodology . . . . . . . 2-2 2.3.1 Estimation of the Mean Value . . . . . . . . 2-2 2.3.2 Lower 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 . . . . . . . . . . . . . . 3-10 3.5 Broadleaf Vegetation . . . . . . . . . . 3-12 3.6 Fish . . . . . . . . . . . . . . 3-14 3.7 Shoreline Sediment . . . . . . . . . . . 3-17 3.8 Direct Gamma Radiation . . . . . . . . . . 3-19 3.8.1 Environmental TLD . . . . . . . . . . 3-19 3.8.2 ISFSI . . . . . . . . . . . . 3-20 3.9 Land Use Census . . . . . . . . . . . 3-24 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 . . . . . . . . . . . 5-1 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 Interlaboratory Comparison Program . . . . . 5-1 5.5.1 Duke Energy Intercomparison Program . . . . . . 5-2 5.5.2 Eckert & Ziegler Analytics Cross Check Program . . . . 5-2 5.5.3 ERA Proficiency Testing . . . . . . . . . 5-2 5.6 Duke Energy Audits . . . . . . . . . . . 5-3 5.7 U.S. Nuclear Regulatory Commission Inspections . . . . . 5-3 5.8 Intercomparison Program . . . . . . . . . . 5-3 5.9 TLD Intercomparison Program . . . . . . . . . 5-3 5.9.1 Nuclear Technology Services Intercomparison Program . . . 5-3 5.9.2 Internal Crosscheck (Duke Energy) . . . . . . . 5-3 Appendices Appendix A: Environmental Sampling and Analysis Procedures . . . . A-1 I. Change of Sampling Procedures . . . . . . . . . A-2 II. Description of Analysis Procedures . . . . . . . . A-2 i

III. Change of Analysis Procedures . . . . . . . . . A-3 IV. Sampling and Analysis Procedures . . . . . . . . A-3 A.1 Airborne Particulate and Radioiodine . . . . . . A-3 A.2 Drinking Water . . . . . . . . . . A-4 A.3 Surface Water . . . . . . . . . . . A-4 A.4 Milk . . . . . . . . . . . . A-4 A.5 Broadleaf Vegetation . . . . . . . . . A-4 A.6 Fish . . . . . . . . . . . . A-4 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 Env. 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 and Unavailable Analyses . . . . . C-1 C.1 Sampling Deviations . . . . . . . . . . C-2 C.2 Unavailable Analyses . . . . . . . . . . C-2 Appendix D: Analytical Deviations . . . . . . . . . . D-1 Appendix E: Radiological Environmental Monitoring Program Results . . . E-1 Appendix F: Errata to Previous Reports . . . . . . . . . F-1 LIST OF FIGURES 2.1-1 Sampling Locations Map (One Mile Radius) . . . . . . 2-4 2.1-2 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 . . . . . . . 3-8 3.5 Concentration of Cs-137 in Broadleaf Vegetation . . . . . 3-12 3.6-1 Concentration of Cs-137 in Fish . . . . . . . . 3-15 3.6-2 Concentration of Cs-134 in Fish . . . . . . . . 3-15 3.7 Concentration of Cs-137 in Shoreline Sediment . . . . . . 3-18 3.8 Direct Gamma Radiation (TLD) Results . . . . . . . 3-20 3.9 2014 Land Use Census Map . . . . . . . . . 3-25 LIST OF TABLES 2.1-A Radiological Monitoring Program Sampling Locations . . . . 2-6 2.1-B 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 Lower Limits of Detection . . . . . 2-9 3.1-A Mean Concentration of Air Radioiodine (I-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 3.3 Mean Concentrations of Radionuclides in Surface Water . . . . 3-9 3.4 Mean Concentration of Radionuclides in Milk . . . . . . 3-11 ii

3.5 Mean Concentration of Radionuclides in Vegetation . . . . . 3-13 3.6 Mean Concentrations of Radionuclides in Fish . . . . . . 3-16 3.7 Mean Concentrations of Radionuclides in Shoreline Sediment . . . 3-18 3.8-A Direct Gamma Radiation (TLD) Results . . . . . . . 3-21 3.8-B Direct Gamma Radiation (TLD) Oconee 2014 Investigation Level . . 3-22 3.9 Oconee 2014 Land Use Census Results . . . . . . . 3-24 4.1-A 2014 Environmental and Effluent Dose Comparison . . . . . 4-3 4.1-B Maximum Individual Dose for 2014 based on Environmental Measurements (mrem) for Oconee Nuclear Station . . . . . 4-5 5.0-A Duke Energy Interlaboratory Comparison Program . . . . . 5-4 5.0-B Eckert & Ziegler Analytics Cross Check Program . . . . . 5-6 5.0-C Environmental Resource Associates (ERA) Proficiency Testing . . . 5-8 5.0-D 2014 Environmental Dosimeter Cross-Check Results . . . . . 5-9 LIST OF ACRONYMS USED IN THIS TEXT (in alphabetical order)

BW BiWeekly C Control EPA Environmental Protection Agency ERA Environmental Resource Associates GI-LLI Gastrointestinal - Lower Large Intestine GPS Global Positioning System ISFSI Independent Spent Fuel Storage Installation LLD Lower Limit of Detection M Monthly MDA Minimum Detectable Activity MOA Memorandum of Agreement mrem Millirem NIST National Institute of Standards and Technology NRC Nuclear Regulatory Commission ODCM Offsite Dose Calculation Manual ONS Oconee Nuclear Station pCi/kg picocurie per kilogram pCi/l picocurie per liter pCi/m3 picocurie per cubic meter PIP Problem Investigation Program Q Quarterly REMP Radiological Environmental Monitoring Program SA Semiannually SLCs Selected Licensee Commitments SM Semimonthly TECH SPECs Technical Specifications TLD Thermoluminescent Dosimeter Ci/ml microcurie per milliliter UFSAR Updated Final Safety Analysis Report W Weekly iii

1.0 EXECUTIVE

SUMMARY

This Annual Radiological Environmental Operating Report describes the Oconee Nuclear Station Radiological Environmental Monitoring Program (REMP), and the program results for the calendar year 2014.

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 (SLCs). Required analyses were performed and detection capabilities were met for all collected samples as required by SLCs. Nine-hundred ninety-two samples were analyzed comprising 1,057 test results in order to compile data for the 2014 report. Based on the annual land use census, the current number of sampling sites for Oconee Nuclear Station is sufficient.

Concentrations observed in the environment in 2014 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 SLCs.

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 3.71E-02 mrem for 2014. 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. Ionizing Radiation Exposure of the Population of the United States, NCRP Report No. 160 (National Council on Radiation Protection and Measurements, Bethesda, Maryland).

Section 1 - Page 1

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 2/6/1973. Unit 2 license for operation was issued 10/6/1973. Unit 3 license for operation was issued 7/19/1974. An independent spent fuel storage installation is also located at the site.

Figures 2.1-1 and 2.1-2 are maps depicting the Thermoluminescent Dosimeter (TLD) monitoring locations and the sampling locations. The location numbers shown on these maps correspond to those listed in Tables 2.1-A and 2.1-B. Figure 2.1-1 comprises all sample locations within a one mile radius of ONS. Figure 2.1-2 comprises all sample locations within a ten mile radius of ONS.

2.2 SCOPE AND 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 determine whether increases in environmental levels are attributable to the station. The operational program provides surveillance and backup support of detailed effluent monitoring which is necessary to evaluate the significance, if any, of the contributions to the existing environmental radioactivity levels that result from station operation.

This monitoring program is based on NRC guidance 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. Reporting levels for radioactivity found in environmental samples are listed in Table 2.2-A. Table 2.2-B lists the REMP analysis and frequency schedule.

Section 2 - Page 1

The Annual Land Use Census, required by Selected Licensee Commitments, is performed to ensure that changes in the use of areas at or beyond the site boundary 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:

N x

i =1 i

x =

N Where:

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

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

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 radioactive material exceeding background amounts. The MDA is calculated using a sample background and may be thought of as an "actual" LLD for a particular sample measurement. Certain gross counting measurements display a calculated negative value, indicating background is greater than sample activity.

2.3.3 TREND IDENTIFICATION One of the purposes of an environmental monitoring program is to determine if there is a buildup of radionuclides in the environment due to the operation of the nuclear 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 normal removal processes (radioactive decay, deposition, resuspension, etc.) are influencing the concentration.

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

Legend

TlD locations

All Other locat10ns

/'></ ONS_Railroods

/'V ONS_Roods

~- I States Q lcounties NHDWaterbody 0*--*0-=2= 5 ==~05 Moles Section 2 - Page 4

Figure 2.1-2 Oconee Nuclear j

Station Sampling Locations Map (Ten Mile Radius)

Legend

TlD l ocations

All Other l ocations A/ ONS_Railroads

/ ' / NavteqHwys Counties NHDWaterbody Incorporated Areas Approximate location of features shown 0 2 3

*Miles Projection NCSP NAD27 Section 2 - Page 5

TABLE 2.1-A OCONEE RADIOLOGICAL MONITORING PROGRAM SAMPLING LOCATIONS Table 2.1-A Codes W Weekly SM Semimonthly BW BiWeekly Q Quarterly M Monthly SA Semiannually C Control I Indicator Site Measure Location Description* Air Rad. &

Particulate Surface Water Drinking Water Shoreline Sediment Fish Milk Broadleaf Vegetation

Type 060 I Greenville Water Intake Road (3.23 NE) M 060 C** Greenville Water 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) [000.7] SA SA 063.1 I Lake Hartwell Hwy 183 (0.79 mi E) M 064 C Seneca Municipal Water Supply(6.67 mi SSW) M

[004.1]

066 I Anderson Municipal Water Supply (18.9 mi M SSE) [012]

Lawrence Ramsey Bridge Hwy 27 067 I (4.34 mi SSE) [005.2] 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) W M 085 I Lake Services / 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 prior to 1984 Section 2 - Page 6

TABLE 2.1-B OCONEE RADIOLOCICAL MONITORING PROGRAM SAMPLING LOCATIONS (TLD SITES)

Table 2.1-B Codes IR Inner Ring OR Outer Ring C Control SI Special Interest Site Measure Location* Distance Sector Site Measure Location* Distance Sector

Type (miles) # Type (miles)

MICROWAVE TOWER, SIX 020 IR SITE BOUNDARY 0.16 N 040 OR MILE 4.74 E 021 IR SITE BOUNDARY 0.25 NNE 041 OR JCT HWY 101 & 133 4.25 ESE LAWRENCE CHAPEL 022 IR SITE BOUNDARY 0.53 NE 042 OR CHURCH, HWY 133 4.93 SE HWY 291 AT 023 IR SITE BOUNDARY 0.93 ENE 043 OR ISSAQUEENA PARK 4.09 SSE HWY 130 AT LITTLE 024 IR SITE BOUNDARY 0.79 E 044 OR RIVER DAM 3.96 S TERMINUS OF HWY 588 025 IR SITE BOUNDARY 0.42 ESE 045 OR AT CROOKED CREEK 4.78 SSW HWY 188 AT 026 IR SITE BOUNDARY 0.34 SE 046 OR CROOKED CREEK 4.61 SW NEW HOPE CHURCH, 027 IR SITE BOUNDARY 0.49 SSE 047 OR HWY 188 3.58 WSW 028 IR SITE BOUNDARY 0.46 S 048 OR JCT HWY 175 & 188 3.64 W 029 IR SITE BOUNDARY 0.56 SSW 049 OR JCT HWY 201 & 92 3.60 WNW STAMP CREEK LANDING, 030 IR SITE BOUNDARY 0.42 SW 050 OR END OF HWY 92 3.53 NW HWY 128, 1 MILE N OF 031 IR SITE BOUNDARY 0.27 WSW 051 OR HWY 130 4.64 NNW DPC BRANCH OFFICE 076 IR SITE BOUNDARY 0.19 W 052 SI SITE - PICKENS 12.4 ENE DPC BRANCH OFFICE 032 IR SITE BOUNDARY 0.19 WNW 053 SI SITE - LIBERTY 11.7 E POST OFFICE - HWY 93 033 IR SITE BOUNDARY 0.21 WNW 054 SI NORRIS 8.60 ESE CLEMSON 034 IR SITE BOUNDARY 0.22 NW 055 SI METEOROLOGY PLOT 9.27 SSE WATER TOWER - SENECA 035 IR SITE BOUNDARY 0.17 NNW 056 SI 7.30 SSW OCONEE MEMORIAL 036 OR MILE CREEK LANDING 4.18 N 057 SI HOSPITAL 8.42 SW KEOWEE CHURCH, BRANCH RD 037 OR HWY 327 4.85 NNE 058 C SUBSTATION,WALHALLA 9.39 WSW CONVENIENCE MART, 038 OR JCT HWY 183 & 133 4.24 NE 059 SI TAMASSEE DAR SCHOOL 9.20 NW HWY 133, 1 MILE EAST CLEMSON 039 OR OF JCT HWY 183 & 133 4.02 ENE 081 C OPERATIONS CENTER 9.33 SE

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

Section 2 - Page 7

TABLE 2.2-A REPORTING LEVELS FOR RADIOACTIVITY CONCENTRATIONS IN ENVIRONMENTAL SAMPLES Analysis Water Air Particulates Fish Milk Broadleaf (pCi/liter) or Gases (pCi/kg-wet) (pCi/liter) Vegetation (pCi/m3) (pCi/kg-wet)

H-3 20,000(a) --- --- --- ---

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

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

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

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

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

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

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

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

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

TABLE 2.2-B REMP ANALYSIS FREQUENCY Sample Analysis Gamma Tritium Low Level Gross TLD Medium Schedule Isotopic I-131 Beta Air Radioiodine Weekly X --- --- ---

AirParticulate Weekly --- --- --- X ---

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 --- --- --- ---

Broadleaf Vegetation Monthly X --- --- --- ---

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

Section 2 - Page 8

TABLE 2.2-C MAXIMUM VALUES FOR THE LOWER LIMITS OF DETECTION Analysis Water Air Fish Milk Broadleaf Sediment (pCi/liter) Particulates (pCi/kg-wet) (pCi/liter) Vegetation (pCi/kg-dry) or Gases (pCi/kg-wet)

(pCi/m3)

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 --- --- --- --- ---

I-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 I-131 analyses is 1 pCi/liter if performed Section 2 - Page 9

3.0 INTERPRETATION OF RESULTS Review of 2014 REMP analysis results was performed to identify changes in environmental levels as a result of station operations. The review is summarized in this section. Data from 2014 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 2014 information required by Technical Specification Administrative Control 5.6.2 are located in Appendix B. REMP results for 2014 are located in Appendix E.

Evaluation for significant trends was performed for the radionuclides that have required LLDs listed in Selected Licensee Commitment 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 2014.

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 2014 due to ONS operation was 1.46% 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 2014.

Section 3 - Page 1

3.1 AIRBORNE RADIOIODINE AND PARTICULATES In 2014, 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 performed on the quarterly filter composite (by location).

Radioiodine samples received a weekly gamma analysis.

There was no detectable I-131 in air samples in 2014. 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 2014 due to ONS plant operations. No gamma emitting particulates due to ONS plant operations have been detected in indicator location samples since the change in gamma spectroscopy analysis systems in 1987.

Beta analysis of particulate filters was initiated in March of 1996 and became required by Selected Licensee Commitments in 1998. Gross beta analysis was performed on particulate filters during the preoperational and early operational history of the plant but had not been required since 1984. Figure 3.1 summarizes gross beta results for the indicator location with the highest annual mean and the control location samples. Both the indicator and control location results are similar in concentration and are near the lower range of preoperational gross beta results which ranged from 0.04 to 1.46 pCi/m3.

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

Section 3 - Page 2

Table 3.1-A Mean Concentration of Air Radioiodine (I-131)

Year Indicator Location (pCi/m3) Control Location (pCi/m3)

Preoperational 1969-1972 0.00E0 0.00E0 Feb. 1973 - June 1973 0.00E0 0.00E0 July 1973 - Dec. 1973 0.00E0 0.00E0 Jan. 1974 - June 1974 0.00E0 0.00E0 July 1974 - Dec. 1974 2.60E-2 8.00E-3 Jan. 1975 - June 1975 8.65E-2 3.12E-2 July 1975 - Dec. 1975 1.13E-2 9.52E-3 1976 2.76E-2 2.18E-2 1977 3.60E-2 3.60E-2 1978 2.19E-1 1.15E-1 1979 7.54E-3 4.75E-4 1980 3.07E-3 9.67E-4 1981 6.31E-3 5.39E-4 1982 2.87E-3 8.10E-4 1983 1.48E-3 3.05E-4 1984 8.11E-4 -2.30E-5 1985 7.71E-4 4.54E-4 1986 5.02E-3 7.86E-3 1987(1) 4.29E-3 5.19E-3 1988 0.00E0 0.00E0 1989 4.99E-4 0.00E0 1990 0.00E0 0.00E0 1991 0.00E0 0.00E0 1992 0.00E0 0.00E0 1993 0.00E0 0.00E0 1994 1.03E-2 0.00E0 1995 0.00E0 0.00E0 1996 0.00E0 0.00E0 1997 0.00E0 0.00E0 1998 0.00E0 0.00E0 1999 0.00E0 0.00E0 2000 0.00E0 0.00E0 2001 0.00E0 0.00E0 2002 0.00E0 0.00E0 2003 0.00E0 0.00E0 2004 0.00E0 0.00E0 2005 0.00E0 0.00E0 2006 0.00E0 0.00E0 2007 0.00E0 0.00E0 2008 0.00E0 0.00E0 2009 0.00E0 0.00E0 2010 0.00E0 0.00E0 2011 5.05E-2 4.13E-2 2012 0.00E0 0.00E0 2013 0.00E0 0.00E0 2014(2) 0.00E0 0.00E0 0.00E0 indicates no detectable measurements 1979 - 1986 mean based on all net activity 2011 concentration affected by Fukushima Daiichi (1) 1987 - Gamma spectroscopy system change (2) 2014 - Gamma spectroscopy system change Section 3 - Page 3

Figure 3.1 pCi/m3 Concentration of Gross Beta in Air Particulate 4.500E-2 4.000E-2 3.500E-2 3.000E-2 2.500E-2 2.000E-2 1.500E-2 1.000E-2 5.000E-3 0.000E+0 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 Indicator Location Control Location There is no reporting level for gross beta in air particulate Table 3.1-B Mean Concentration of Gross Beta in Air Particulate Monitoring Period Indicator Location (pCi/m3) Control Location (pCi/m3) 1996 3.87E-2 3.69E-2 1997 2.87E-2 2.92E-2 1998 2.47E-2 1.56E-2 1999 2.85E-2 2.23E-2 2000 2.38E-2 1.85E-2 2001 2.05E-2 1.94E-2 2002 2.01E-2 1.84E-2 2003 1.86E-2 1.82E-2 2004 1.92E-2 1.90E-2 2005 1.95E-2 1.91E-2 2006 2.09E-2 2.00E-2 2007 2.31E-2 2.13E-2 2008 2.08E-2 2.04E-2 2009 1.82E-2 1.80E-2 2010 2.02E-2 2.04E-2 2011 2.06E-2 1.92E-2 2012 2.63E-2 1.97E-2 2013 1.96E-2 1.74E-2 Average (2004 - 2013) 2.08E-2 1.95E-2 2014 2.11E-2 1.86E-2 Section 3 - Page 4

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 annual mean for gross beta results since the preoperational period. The indicator location had an average concentration of 1.43 pCi/liter in 2014, and the control location had a concentration of 1.12 pCi/liter. For comparison purposes, the 2013 indicator mean was 1.57 pCi/liter. The table shows that 2014 gross beta levels in drinking water are lower than preoperational concentrations.

The dose for consumption of water was less than one mrem per year, historically and for 2014; therefore low-level iodine analysis is not required.

Tritium was detected in two of the twelve composite samples during 2014. The 2014 mean indicator location 066 concentration was 292 pCi/liter, which is 1.46% of the 20,000 pCi/l Tritium reporting level. Table 3.2 and Figure 3.2 show the highest indicator and control location annual means for Tritium since analysis was initiated early in the operational period. Tritium concentrations have decreased at both the indicator and control locations. The closure of the Clemson water plant in 1989 is one 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 2014. 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 Current reporting level implemented 1984 pCi/liter 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 Indicator Location Control Location 20 % 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 ending 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 1.22 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 1.40 558 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 1.51 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 1.10 0.97 308 0.00 2011 1.18 1.00 339 0.00 2012 1.40 0.92 322 0.00 2013 1.57 1.11 325 0.00 2014 1.43 1.12 292 0.00 0.00 indicates no detectable measurements 1989 - Clemson water plant closes; nearest downstream plant is Anderson.

1979 - 1986 mean based on all net activity results Section 3 - Page 6

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

Tritium was detected in the four indicator location samples. The 2014 average concentration was 3,493 pCi/liter. The individual samples ranged from 1,420 to 6,960 pCi/liter. For comparison purposes, the 2013 mean concentration was 3,683 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 2014. No gamma emitting radionuclides attributable to station operation have been detected in surface water samples since 1999. Table 3.3 summarizes the indicator annual means of radionuclides detected since the change in the gamma spectroscopy analysis system in 1987. Visual inspection of the gamma spectroscopy tabular data covering the early operational period through 2014 did not reveal any increasing trends.

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

Section 3 - Page 7

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

1969 1975 1978 1983 1988 1993 1998 2003 2008 2013 Indicator Location Control Location There is no reporting level for Tritium in surface water Section 3 - Page 8

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

Preoperational 1969 Qualitative results reported 4.86E2 Preoperational 1970 Qualitative results reported 5.94E2 Preoperational 1971 Qualitative results reported 4.01E2 Preoperational 1972 Qualitative results reported 3.62E2 1973 Qualitative results reported 0.00E0 1974 0.00E0 1.32E1 0.00E0 1.60E1 1.99E3 Jan. 1975 - June 1975 0.00E0 0.00E0 0.00E0 0.00E0 1.56E4 July 1975 - Dec. 1975 0.00E0 1.34E1 0.00E0 0.00E0 5.52E4 1976 1.08E2 3.30E1 0.00E0 3.50E1 2.95E4 1977 2.60E1 1.80E1 0.00E0 3.10E1 2.90E3 1978 2.96E2 0.00E0 0.00E0 2.22E1 8.00E2 1979 1.33E0 2.60E0 1.78E0 2.82E0 4.37E3 1980 1.56E0 2.30E0 1.22E0 5.40E0 4.93E3 1981 1.10E0 6.10E-1 1.70E0 3.90E0 7.21E3 1982 6.14E-1 1.99E0 2.29E0 4.85E0 6.13E3 1983 6.99E-1 3.02E0 3.91E-1 6.83E-1 8.40E3 1984 9.40E-1 6.30E-1 7.90E-1 4.83E-1 9.90E3 1985 2.15E-1 6.27E-1 4.95E-1 9.90E-1 1.05E4 1986 3.28E0 1.23E0 1.14E0 3.07E-1 1.26E4 1987(1) 5.10E1 3.40E0 4.00E0 0.00E0 7.08E3 1988 6.20E0 5.00E0 2.50E0 3.50E0 1.10E4 1989 5.30E0 3.00E0 0.00E0 3.40E0 1.02E4 1990 1.70E0 1.60E0 0.00E0 0.00E0 1.03E4 1991 5.40E0 0.00E0 0.00E0 0.00E0 5.76E3 1992 2.50E0 0.00E0 0.00E0 0.00E0 6.22E3 1993 0.00E0 0.00E0 0.00E0 0.00E0 8.62E3 1994 0.00E0 0.00E0 0.00E0 0.00E0 5.75E3 1995 0.00E0 0.00E0 0.00E0 0.00E0 6.65E3 1996 0.00E0 0.00E0 0.00E0 0.00E0 4.54E3 1997 0.00E0 0.00E0 0.00E0 0.00E0 5.50E3 1998 0.00E0 0.00E0 0.00E0 0.00E0 3.35E3 1999 2.73E1 0.00E0 0.00E0 0.00E0 1.13E4 2000 0.00E0 0.00E0 0.00E0 0.00E0 1.48E4 2001 0.00E0 0.00E0 0.00E0 0.00E0 7.43E3 2002 0.00E0 0.00E0 0.00E0 0.00E0 1.00E4 2003 0.00E0 0.00E0 0.00E0 0.00E0 4.77E3 2004 0.00E0 0.00E0 0.00E0 0.00E0 3.86E3 2005 0.00E0 0.00E0 0.00E0 0.00E0 5.15E3 2006 0.00E0 0.00E0 0.00E0 0.00E0 6.72E3 2007 0.00E0 0.00E0 0.00E0 0.00E0 9.91E3 2008 0.00E0 0.00E0 0.00E0 0.00E0 9.43E3 2009 0.00E0 0.00E0 0.00E0 0.00E0 4.68E3 2010 0.00E0 0.00E0 0.00E0 0.00E0 1.23E4 2011 0.00E0 0.00E0 0.00E0 0.00E0 4.75E3 2012 0.00E0 0.00E0 0.00E0 0.00E0 5.76E3 2013 0.00E0 0.00E0 0.00E0 0.00E0 3.68E3 2014(2) 0.00E0 0.00E0 0.00E0 0.00E0 3.49E3 0.00E0 indicates no detectable measurements 1979-1986 mean based on all net activity results (1) 1987 - Gamma spectroscopy system change (2) 2014 - Gamma spectroscopy system change Section 3 - Page 9

3.4 MILK Gamma spectroscopy and low level iodine analysis was performed on 26 milk samples collected from the control location in 2014. No indicator dairies were sampled during 2014 and none were identified by the 2014 land use census.

There were no gamma emitting radionuclides due to ONS plant operations identified in milk samples in 2014. Cs-137 is the only radionuclide, other than naturally occurring, reported in milk samples since 1988 (excluding Fukushima Daiichi). Cs-137 in milk is not unusual. It is a constituent of nuclear weapons test fallout and nuclear plant accidents and has been observed periodically in samples from indicator and control locations since the preoperational period.

Table 3.4 lists the highest indicator location annual mean and control location annual mean for Cs-137 since the 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 10

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

Preoperational 1.57E1 1.46E1 Feb. 1973 - June 1973 Qualitative results reported Qualitative results reported July 1973 - Dec. 1973 5.80E0 Qualitative results reported Jan. 1974 - June 1974 5.30E0 0.00E0 July 1974 - Dec. 1974 1.11E1 0.00E0 Jan. 1975 - June 1975 1.51E1 9.45E0 July 1975 - Dec. 1975 0.00E0 0.00E0 1976 1.80E1 7.47E0 1977 0.00E0 0.00E0 1978 1.33E1 1.33E1 1979 7.25E0 2.52E0 1980 3.58E0 2.63E0 1981 5.52E0 5.51E0 1982 2.71E0 3.25E0 1983 5.04E0 -4.27E-1 1984 2.30E0 2.58E0 1985 2.38E0 1.31E0 1986 2.92E0 2.97E0 1987(1) 4.90E0 4.90E0 1988 3.90E0 3.20E0 1989 4.70E0 2.90E0 1990 6.40E0 0.00E0 1991 5.00E0 0.00E0 1992 6.60E0 0.00E0 1993 0.00E0 0.00E0 1994 0.00E0 1.80E0 1995 2.30E0 2.00E0 1996 0.00E0 4.10E0 1997 0.00E0 0.00E0 1998 0.00E0 0.00E0 1999 0.00E0 0.00E0 2000 0.00E0 0.00E0 2001 0.00E0 0.00E0 2002 0.00E0 0.00E0 2003 0.00E0 0.00E0 2004 0.00E0 0.00E0 2005 0.00E0 0.00E0 2006 No Indicator Location 0.00E0 2007 No Indicator Location 0.00E0 2008 No Indicator Location 0.00E0 2009 No Indicator Location 0.00E0 2010 No Indicator Location 0.00E0 2011 No Indicator Location 0.00E0 2012 No Indicator Location 0.00E0 2013 No Indicator Location 0.00E0 2014(2) No Indicator Location 0.00E0 0.00E0 indicates no detectable measurements 1979 - 1986 mean based on all net activity results (1) 1987 - Gamma spectroscopy system change (2) 2014 - Gamma spectroscopy system change The Oconee milk program was updated to align with NUREG-1301 during 2005 and documented in PIP O-04-01179. Location 071 was designated as the new control site effective with the 7/12/2005 sampling. No indicator dairies were identified by the 2014 land use census.

Section 3 - Page 11

3.5 BROADLEAF VEGETATION Gamma spectroscopy was performed on 48 broadleaf vegetation samples during 2014. Three indicator locations and one control location were sampled. There were no gamma emitting radionuclides attributable to ONS station operation identified in vegetation samples in 2014.

Cs-137 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-137 since the early operational period of the plant. Table 3.5 shows historical concentrations of Cs-137.

It is not unusual for Cs-137 to be present in vegetation. It is a constituent of nuclear weapons test fallout and nuclear plant accidents and has been observed in samples from indicator and control locations 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 stations operational history. Visual inspection of the tabular data did not reveal any increasing trends.

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

Figure 3.5 pCi/kg 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 2011 concentration affected by Fukushima Daiichi Section 3 - Page 12

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

July 1974 - Dec. 1974 1.54E3 0.00E0 Jan. 1975 - June 1975 1.55E3 1.59E3 July 1975 - Dec. 1975 0.00E0 0.00E0 1976 0.00E0 0.00E0 1977 0.00E0 7.90E2 1978 1.19E2 8.19E1 1979 5.04E1 2.96E1 1980 2.80E1 1.55E1 1981 2.99E1 2.60E1 1982 2.42E1 2.62E1 1983 7.44E0 5.35E-1 1984 1.37E1 4.74E2 1985 1.62E1 2.20E2 1986 3.28E1 3.12E2 1987(1) 2.70E1 4.20E1 1988 2.40E1 7.50E1 1989 0.00E0 1.08E2 1990 2.73E2 1.74E2 1991 2.20E1 1.45E2 1992 0.00E0 1.46E2 1993 0.00E0 1.49E2 1994 0.00E0 1.06E2 1995 4.30E1 1.58E2 1996 3.79E1 1.83E2 1997 4.73E1 1.35E2 1998 7.28E1 1.61E2 1999 1.34E2 0.00E0 2000 1.06E2 0.00E0 2001 3.19E1 0.00E0 2002 8.44E1 0.00E0 2003 0.00E0 0.00E0 2004 0.00E0 5.96E1 2005 4.51E1 4.11E1 2006 1.77E1 0.00E0 2007 0.00E0 0.00E0 2008 0.00E0 0.00E0 2009 0.00E0 0.00E0 2010 0.00E0 0.00E0 2011 6.68E1 3.35E1 2012 0.00E0 0.00E0 2013 2.57E1 0.00E0 2014(2) 0.00E0 0.00E0 0.00E0 indicates no detectable measurements Control location changed to 073 in 1984 Qualitative results reported prior to 1974 Control location 081 added in 1998 1979 - 1986 mean based on all net activity Control location 073 removed in 1999 (1) 1987 - Gamma spectroscopy system change 2011 concentration affected by Fukushima Daiichi (2) 2014 - Gamma spectroscopy system change Section 3 - Page 13

3.6 FISH In 2014, gamma spectroscopy was performed on 12 fish samples. Two downstream indicator and one control location were sampled. Cs-137 was identified in two of the eight indicator location samples. Cs-137 was detected in two of the four control location samples at a mean concentration of 8.82 pCi/kg. The highest average indicator concentration for Cs-137 was 14.0 pCi/kg (0.7% of reporting level).

Figures 3.6-1 and 3.6-2 are graphs displaying the annual means for Cs-137 and Cs-134.

Historically, both are contributors to the calculated dose from liquid effluents from ingestion of fish. Radioactivity concentrations in downstream fish samples are higher than those reported in preoperational fish samples, however, concentrations in fish have decreased over time with decreases in radioactive material releases from the plant.

One factor affecting the trend analysis is a change in sampling locations. In 1984, a second downstream fish location was added. Location 063 is closer to the liquid effluent discharge point and has been the highest mean indicator since it was added.

Table 3.6 lists the highest indicator location annual means since the preoperational period for radionuclides detected in 2014. Also included in the table are radionuclides that have been identified in this media since the change in analysis systems in 1987. Comparison of data to previous years does not indicate any increases in concentrations.

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

Section 3 - Page 14

Figure 3.6-1 pCi/kg Concentration of Cs-137 in Fish 2500 2000 1500 1000 500 0

1970 1974 1976 1978 1981 1984 1987 1990 1993 1996 1999 2002 2005 2008 2011 2014 Indicator Location Control Location Reporting Level Figure 3.6-2 pCi/kg Concentration of Cs-134 in Fish 700 600 500 400 300 200 100 0

1970 1974 1976 1978 1981 1984 1987 1990 1993 1996 1999 2002 2005 2008 2011 2014 Indicator Location Control Location 50% Reporting Level Current reporting levels implemented 1984 Section 3 - Page 15

Table 3.6 Mean Concentrations of Radionuclides in Fish Year Co-58 (pCi/kg) Co-60 (pCi/kg) Cs-134 (pCi/kg) Cs-137 (pCi/kg)

Preop ending Jan.1971 0.00E0 0.00E0 0.00E0 1.46E2 Preop ending Jan.1973 0.00E0 0.00E0 0.00E0 1.66E2 Feb. 1973 - June 1973 Qualitative results reported-no significant measurements above background July 1973 - Dec. 1973 0.00E0 0.00E0 0.00E0 1.89E2 Jan. 1974 - June 1974 0.00E0 0.00E0 0.00E0 2.47E1 July 1974 - Dec. 1974 0.00E0 0.00E0 0.00E0 4.85E1 Jan. 1975 - June 1975 0.00E0 0.00E0 3.81E1 1.05E2 July 1975 - Dec. 1975 8.50E1 0.00E0 7.00E1 3.13E2 1976 5.70E1 1.14E2 7.73E1 1.66E2 1977 0.00E0 0.00E0 1.80E2 3.60E2 1978 3.27E2 0.00E0 3.31E2 0.00E0 1979 1.91E0 1.56E1 9.26E1 3.88E2 1980 1.45E1 1.90E1 1.10E2 3.99E2 1981 2.25E1 1.49E1 1.40E2 4.51E2 1982 9.83E-1 8.03E0 1.17E2 2.94E2 1983 3.35E1 4.53E0 1.24E2 3.32E2 1984 1.21E2 6.23E1 3.87E2 1.04E3 1985 1.62E1 1.10E1 7.93E1 2.85E2 1986 9.56E1 2.59E1 2.57E2 7.36E2 1987(1) 1.63E2 6.30E1 9.80E1 3.93E2 1988 9.60E1 0.00E0 7.20E1 2.60E2 1989 4.30E1 1.50E1 8.60E1 3.36E2 1990 1.50E1 0.00E0 4.80E1 1.19E2 1991 4.59E1 0.00E0 1.25E2 1.94E2 1992 6.10E1 0.00E0 4.80E1 1.36E2 1993 0.00E0 0.00E0 2.10E1 1.10E2 1994 0.00E0 0.00E0 2.80E1 1.05E2 1995 0.00E0 0.00E0 3.10E1 9.20E1 1996 0.00E0 0.00E0 4.49E1 1.25E2 1997 0.00E0 0.00E0 0.00E0 1.18E2 1998 0.00E0 0.00E0 0.00E0 5.79E1 1999 0.00E0 0.00E0 0.00E0 1.04E2 2000 0.00E0 0.00E0 0.00E0 7.54E1 2001 1.72E1 0.00E0 0.00E0 9.92E1 2002 0.00E0 0.00E0 0.00E0 9.37E1 2003 5.02E1 0.00E0 0.00E0 6.04E1 2004 0.00E0 0.00E0 0.00E0 5.29E1 2005 0.00E0 0.00E0 0.00E0 5.14E1 2006 0.00E0 0.00E0 0.00E0 5.58E1 2007 0.00E0 0.00E0 0.00E0 4.10E1 2008 0.00E0 0.00E0 0.00E0 3.13E1 2009 9.01E0 0.00E0 0.00E0 2.68E1 2010 0.00E0 0.00E0 0.00E0 2.69E1 2011 0.00E0 0.00E0 0.00E0 3.53E1 2012 1.23E2 3.61E1 0.00E0 4.32E1 2013 0.00E0 0.00E0 0.00E0 2.44E1 2014(2) 0.00E0 0.00E0 0.00E0 1.40E1 0.00E0 indicates no detectable measurements 1979 - 1986 mean based on all net activity (1) 1987 - Gamma spectroscopy system change (2) 2014 - Gamma spectroscopy system change Section 3 - Page 16

3.7 SHORELINE SEDIMENT Gamma spectroscopy was performed on six sediment samples. Two downstream indicator locations and one control location were sampled. Four samples were taken from indicator locations and two from the control location.

Cs-137 was identified in one of the four indicator location samples. Cs-137 was not identified in the control location samples. The highest 2014 individual sample Cs-137 concentration was 21.1 pCi/kg. For comparison, the highest 2013 individual sample Cs-137 concentration was 43.7 pCi/kg. Table 3.7 lists the highest indicator location annual means since shoreline sediment was initiated in 1984. Included in the table are radionuclides that have been identified in this media since the change in analysis systems in 1987.

Visual inspection of the tabular data did not reveal any trends. Figure 3.7 is a graph of the Cs-137 annual means. Historically, Cs-137 is a contributor to the calculated dose from liquid effluents from shoreline sediment. No trends are apparent.

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

Figure 3.7 pCi/kg Concentration of Cs-137 in Shoreline Sediment 1000 900 800 700 600 500 400 300 200 100 0

1984 1987 1990 1993 1996 1999 2002 2005 2008 2011 2014 Indicator Location 063 Indicator Location 067 Control Location 068 There are no reporting levels for shoreline sediment Section 3 - Page 17

Table 3.7 Mean Concentrations of Radionuclides in Shoreline Sediment (pCi/kg)

Year Mn-54 Co-58 Co-60 Zn-65 Cs-134 Cs-137 Ag-110m Sb-125 1984 1.10E1 1.09E1 1.19E1 0.00E0 7.77E1 5.16E1 0.00E0 0.00E0 1985 9.39E0 1.27E0 4.79E0 0.00E0 7.63E1 9.47E1 0.00E0 0.00E0 1986 2.24E1 1.62E1 2.50E1 0.00E0 1.41E2 7.12E2 0.00E0 0.00E0 1987(1) 5.40E1 4.70E2 5.07E2 0.00E0 1.01E2 6.22E2 3.46E2 0.00E0 1988 3.30E1 1.20E2 1.87E2 6.70E1 6.60E1 7.59E2 1.62E2 3.67E2 1989 2.30E1 1.24E2 1.96E2 0.00E0 5.40E1 8.48E2 5.50E1 1.86E2 1990 3.40E1 8.00E1 2.59E2 0.00E0 4.50E1 5.36E2 1.71E2 9.00E1 1991 3.26E1 5.60E1 8.57E1 0.00E0 6.91E1 1.24E2 1.10E2 1.78E2 1992 8.79E1 1.79E2 1.12E2 0.00E0 5.60E1 3.31E2 1.69E2 2.08E2 1993 8.20E1 8.20E1 6.50E1 0.00E0 3.20E1 1.36E2 5.63E1 1.11E2 1994 5.30E1 7.00E1 1.49E2 0.00E0 6.70E1 2.38E2 1.04E2 1.29E2 1995 1.43E2 3.90E1 2.40E1 0.00E0 1.10E1 5.20E1 0.00E0 0.00E0 1996 0.00E0 5.10E1 0.00E0 0.00E0 1.98E1 1.19E2 0.00E0 0.00E0 1997 0.00E0 0.00E0 0.00E0 0.00E0 0.00E0 1.06E2 0.00E0 0.00E0 1998 0.00E0 0.00E0 0.00E0 0.00E0 0.00E0 1.01E2 0.00E0 0.00E0 1999 6.96E1 0.00E0 0.00E0 0.00E0 0.00E0 7.38E1 0.00E0 0.00E0 2000 0.00E0 0.00E0 0.00E0 0.00E0 0.00E0 8.54E1 0.00E0 0.00E0 2001 0.00E0 2.10E1 0.00E0 0.00E0 0.00E0 1.20E2 0.00E0 0.00E0 2002 0.00E0 0.00E0 0.00E0 0.00E0 0.00E0 6.96E1 0.00E0 0.00E0 2003 0.00E0 0.00E0 0.00E0 0.00E0 0.00E0 1.93E2 0.00E0 0.00E0 2004 8.54E1 0.00E0 0.00E0 0.00E0 0.00E0 9.56E1 0.00E0 0.00E0 2005 2.00E2 0.00E0 0.00E0 0.00E0 0.00E0 6.53E1 0.00E0 0.00E0 2006 0.00E0 0.00E0 0.00E0 0.00E0 0.00E0 5.01E1 0.00E0 0.00E0 2007 0.00E0 0.00E0 0.00E0 0.00E0 0.00E0 2.97E2 0.00E0 0.00E0 2008 0.00E0 0.00E0 0.00E0 0.00E0 0.00E0 1.78E2 0.00E0 0.00E0 2009 0.00E0 0.00E0 0.00E0 0.00E0 0.00E0 6.97E1 0.00E0 0.00E0 2010 0.00E0 0.00E0 0.00E0 0.00E0 0.00E0 1.15E2 0.00E0 0.00E0 2011 0.00E0 0.00E0 0.00E0 0.00E0 0.00E0 6.83E1 0.00E0 0.00E0 2012 0.00E0 0.00E0 0.00E0 0.00E0 0.00E0 6.35E1 0.00E0 0.00E0 2013 0.00E0 0.00E0 0.00E0 0.00E0 0.00E0 4.37E1 0.00E0 0.00E0 2014(2) 0.00E0 0.00E0 0.00E0 0.00E0 0.00E0 2.11E1 0.00E0 0.00E0 0.00E0 indicates no detectable measurements 1984 - 1986 mean based on all net activity (1) 1987 - Gamma spectroscopy system change (2) 2014 - Gamma spectroscopy system change Section 3 - Page 18

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 permanent public access is permitted within the exclusion area. TLD locations designated as "inner ring" were placed within exclusion area upon inception of the REMP and all are used as indicators. Due to close proximity with Oconee, inner ring TLD locations are not good indicators of radiation exposure to a member of the public, but are good at determining nearby environmental effects due to plant operation. Based on their placement, inner ring TLD locations are expected to occasionally be influenced by normal plant operation. TLD locations designated as "outer ring" are outside the 1 mile exclusion area but within a 5 mile radius of station center. All outer ring TLD locations are used as indicators. A subset of TLD locations within a 7 to 13 mile radius from station center are designated as "special interest". The two "control" locations are greater than 9 miles from station center. These locations were chosen to reduce the probability of influence from Oconee operation on data. The control locations are not used as background subtraction in the TLD analysis. Their purpose is to provide a comparison to indicator locations.

In 2014, 167 total TLDs were analyzed, 159 at indicator locations and 8 at control locations. TLDs are collected and analyzed quarterly. Transit and laboratory background dose is determined and subtracted from gross field readings as required by ANSI N545-1975. The highest annual total dose was 104 mrem at indicator location 048, 3.64 miles W of station center. Figure 3.8 and Table 3.8 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 2014 Oconee Annual Radiological Effluent Release Report (ARERR), dose to a member of the public resulting from gaseous effluent releases at Oconee is a small fraction of measured TLD dose. Therefore, it can be concluded that gaseous effluents from Oconee had negligible impact on measured TLD values.

Starting in 2014, enhanced analytical methods were implemented. Quarterly and annual baseline dose was determined using appropriate statistical methods considering data from 2000 through 2012. Quarterly and annual dose for 2014 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 2014, 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 19

A TLD intercomparison program is conducted as part of the quality assurance program. Results of this program are included in section 5.9.

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 effluents are expected from the passive storage provided by the ISFSI. Therefore any dose to offsite locations would be from direct and scattered gamma radiation.

The Oconee REMP serves as the operational program for the ISFSI. Several environmental TLD locations are presently located at the Oconee site boundary fence near the ISFSI. The closest of these is 0.3 miles from the ISFSI, well within the 1 mile exclusion boundary. In addition, dose rates at the ISFSI restricted area fence are monitored with TLDs as part of the routine REMP. These are used, in part, to control occupational exposure and augment the REMP according to the Oconee ISFSI UFSAR. The maximum TLD dose at the ISFSI fence, which is not accessible to the public, was 578 mrem per standard quarter. This is consistent with previous measurements.

Figure 3.8 mrem/year Direct Gamma Radiation (TLD) Results 250 200 150 100 50 0

1984 1987 1990 1993 1996 1999 2002 2005 2008 2011 2014 Inner Ring Outer Ring Control There is no reporting level for Direct Radiation (TLD)

AREOR 2014, results converted from mR/yr to mrem/yr (n

0.95)

Section 3 - Page 20

Table 3.8-A Direct Gamma Radiation (TLD) Results(1)

Inner Ring Average Outer Ring Average Control Average Year (mrem/yr) (mrem/yr) (mrem/yr)

Preoperational 1.07E2 1.18E2 1.42E2 1984 7.54E1 7.96E1 1.05E2 1985 1.11E2 1.15E2 1.49E2 1986 9.90E1 1.01E2 1.43E2 1987 8.01E1 8.44E1 9.91E1 1988 6.87E1 7.47E1 1.07E2 1989 6.05E1 5.86E1 8.49E1 1990 4.96E1 4.82E1 6.66E1 1991 5.81E1 6.18E1 8.36E1 1992 7.24E1 6.95E1 8.74E1 1993 7.11E1 7.66E1 8.84E1 1994 8.25E1 9.00E1 1.06E2 1995 8.89E1 9.66E1 1.25E2 1996 6.51E1 7.44E1 9.60E1 1997 6.92E1 7.96E1 9.93E1 1998 6.81E1 7.68E1 1.12E2 1999 7.08E1 7.84E1 9.88E1 2000 7.24E1 8.03E1 1.00E2 2001 6.99E1 7.83E1 9.71E1 2002 7.28E1 8.11E1 1.03E2 2003 7.36E1 8.23E1 1.03E2 2004 7.61E1 8.31E1 1.05E2 2005 7.54E1 8.46E1 9.95E1 2006 7.79E1 8.57E1 1.04E2 2007 7.70E1 8.55E1 1.03E2 2008 8.04E1 9.03E1 1.05E2 2009 8.08E1 8.98E1 1.06E2 2010 7.94E1 8.85E1 9.77E1 2011 7.96E1 8.91E1 1.05E2 2012 7.89E1 8.79E1 1.05E2 2013 7.83E1 8.84E1 1.06E2 2014 7.58E1 8.46E1 1.05E2 (1) 2014 AREOR, tabular results converted from mR/yr to mrem/yr (n

0.95)

Section 3 - Page 21

Table 3.8-B Direct Gamma Radiation (TLD) Oconee 2014 Investigation Level Oconee 2014 MDDQ: 7 Oconee 2014 MDDA: 11 Quarterly (mrem) Annual(mrem)

Location BQ MQQ1 MQQ2 MQQ3 MQQ4 LQQ1 LQQ2 LQQ3 LQQ4 BA M A* LA 20 18.9 21.1 16.8 17.8 19.1 ND ND ND ND 75.7 74.8 ND 21 14.0 17.5 12.0 13.0 13.6 ND ND ND ND 56.9 56.1 ND 22-P 21.8 24.8 20.0 20.2 23.2 ND ND ND ND 89.7 88.3 ND 22-S 19.8 22.1 18.9 20.1 21.9 ND ND ND ND 83.5 83.0 ND 23-P 21.9 23.5 20.3 20.3 22.6 ND ND ND ND 87.8 86.7 ND 23-S 24.4 26.1 22.5 22.3 24.2 ND ND ND ND 97.4 95.2 ND 24-P 22.8 26.1 21.8 21.9 25.1 ND ND ND ND 98.6 94.8 ND 24-S 24.4 27.0 20.8 22.2 25.1 ND ND ND ND 98.4 95.1 ND 25 17.1 21.5 16.2 17.9 19.2 ND ND ND ND 72.9 74.7 ND 26 16.5 18.6 15.0 15.6 15.4 ND ND ND ND 67.2 64.6 ND 27-P 19.2 21.3 16.8 17.1 18.1 ND ND ND ND 78.1 73.2 ND 27-S 19.6 24.7 20.2 20.0 21.0 ND ND ND ND 80.1 86.0 ND 28 17.0 17.6 14.4 15.6 17.9 ND ND ND ND 68.3 65.5 ND 29 15.7 16.2 14.3 13.7 15.7 ND ND ND ND 63.3 59.9 ND 30 17.0 18.1 14.5 15.8 18.5 ND ND ND ND 70.6 67.0 ND 31 16.4 18.1 14.1 16.7 16.9 ND ND ND ND 65.7 65.7 ND 32 22.9 19.5 16.3 15.6 19.1 ND ND ND ND 94.5 70.5 ND 33 19.5 21.2 16.8 17.0 20.7 ND ND ND ND 77.9 75.7 ND 34 21.5 23.9 20.1 19.9 22.4 ND ND ND ND 86.0 86.4 ND 35 22.9 26.6 21.3 22.1 25.7 ND ND ND ND 93.3 95.7 ND 36-P 26.5 26.6 --- 21.6 25.5 ND ND ND ND 105.1 98.2 ND 36-S 23.0 23.4 19.9 19.2 22.7 ND ND ND ND 92.2 85.1 ND 37-P 20.4 22.4 16.5 17.0 17.7 ND ND ND ND 82.0 73.6 ND 37-S 17.9 19.4 18.2 19.2 21.0 ND ND ND ND 71.6 77.8 ND 38-P 21.9 24.2 19.3 18.4 22.7 ND ND ND ND 87.5 84.6 ND 38-S 25.6 25.7 20.0 20.6 24.8 ND ND ND ND 102.4 91.2 ND 39-P 24.2 25.4 21.9 22.3 24.1 ND ND ND ND 96.2 93.8 ND 39-S 23.2 24.7 20.6 20.9 22.0 ND ND ND ND 92.7 88.3 ND 40 23.7 28.1 23.0 23.3 26.9 ND ND ND ND 101.1 101.3 ND 41-P 17.3 18.6 14.5 14.6 17.4 ND ND ND ND 69.1 65.2 ND 41-S 16.9 19.5 15.4 14.9 17.7 ND ND ND ND 68.3 67.5 ND 42-P 25.0 27.7 23.3 24.3 26.2 ND ND ND ND 102.2 101.6 ND 42-S 24.8 26.6 22.9 23.2 24.9 ND ND ND ND 102.0 97.6 ND 43 23.8 --- 20.9 21.4 23.9 ND ND ND ND 95.3 88.3 ND 44-P 18.3 20.7 16.9 17.5 18.1 ND ND ND ND 80.0 73.2 ND 44-S 18.7 18.6 15.1 15.6 17.7 ND ND ND ND 74.8 67.0 ND 45-P 17.0 17.6 14.4 14.8 19.2 ND ND ND ND 67.9 66.0 ND 45-S 18.5 20.0 16.9 17.5 19.3 ND ND ND ND 79.4 73.6 ND 46-P 21.5 23.9 20.1 21.6 22.4 ND ND ND ND 91.8 88.1 ND 46-S 20.7 21.1 19.2 19.1 22.0 ND ND ND ND 83.3 81.4 ND 47 22.4 25.3 20.7 20.1 22.6 ND ND ND ND 91.1 88.7 ND 48-P 25.3 26.9 23.2 24.7 26.6 ND ND ND ND 101.3 101.4 ND 48-S 25.4 28.4 22.9 23.2 25.3 ND ND ND ND 103.7 99.8 ND 49-P 20.7 24.1 20.2 21.5 22.7 ND ND ND ND 82.6 88.5 ND 49-S 19.2 22.0 18.1 19.4 20.3 ND ND ND ND 78.6 79.9 ND 50-P 17.7 19.2 15.4 18.1 18.4 ND ND ND ND 70.9 71.1 ND 50-S 16.6 18.6 14.3 15.4 16.9 ND ND ND ND 66.4 65.2 ND 51-P 19.0 20.0 17.6 17.5 18.6 ND ND ND ND 76.2 73.6 ND 51-S 18.1 21.6 16.2 16.4 19.3 ND ND ND ND 72.6 73.5 ND

Ma determined by normalizing available quarterly data to 4 full quarters Table 3.8-B continued on the next page Section 3 - Page 22

Table 3.8-B continued from preceding page Oconee 2014 MDDQ: 7 Oconee 2014 MDDA: 11 Quarterly (mrem) Annual(mrem)

Location BQ MQQ1 MQQ2 MQQ3 MQQ4 LQQ1 LQQ2 LQQ3 LQQ4 BA M A* LA 52-P 22.9 25.7 21.6 21.3 23.3 ND ND ND ND 94.8 91.8 ND 52-S 28.9 31.8 28.6 27.1 29.7 ND ND ND ND 117.0 117.2 ND 53-P 25.1 27.8 22.4 20.6 26.0 ND ND ND ND 102.3 96.9 ND 53-S 24.9 30.2 22.0 22.5 25.0 ND ND ND ND 103.6 99.8 ND 54-P 18.5 23.0 16.2 16.5 20.4 ND ND ND ND 76.5 76.2 ND 54-S 20.6 24.7 20.1 19.7 21.9 ND ND ND ND 85.7 86.4 ND 55-P 15.5 18.5 13.4 14.0 16.2 ND ND ND ND 65.1 62.0 ND 55-S 15.2 17.4 14.7 14.7 15.9 ND ND ND ND 65.0 62.7 ND 56-P 22.8 24.7 21.5 21.1 22.5 ND ND ND ND 91.8 89.8 ND 56-S 16.3 19.3 14.4 15.1 15.6 ND ND ND ND 65.4 64.4 ND 57-P 22.4 26.8 20.8 20.1 23.4 ND ND ND ND 93.6 91.1 ND 57-S 19.7 22.2 18.3 19.3 19.4 ND ND ND ND 76.7 79.2 ND 58 29.3 33.2 30.0 28.6 31.1 ND ND ND ND 119.7 122.8 ND 59 24.1 25.7 22.9 24.1 24.1 ND ND ND ND 98.5 96.9 ND 76 20.8 25.7 20.6 20.0 20.4 ND ND ND ND 89.0 86.7 ND 81 21.9 24.2 21.2 20.5 23.5 ND ND ND ND 91.1 89.4 ND

Ma determined by normalizing available quarterly data to 4 full quarters Table 3.8-B definition of terms

MDDQ = minimum differential dose, quarterly, 3 times 90th percentile sQ determined from analysis in mrem

MDDA = minimum differential dose, annual, 3 times 90th percentile sA determined from analysis in mrem

BQ = Quarterly baseline (mrem)

MQ = locations 91 day standard quarter normalized dose (mrem per standard quarter)

LQ = quarterly investigation level dose (mrem)

BA = baseline background dose (mrem) (annual)

MA = annual monitoring data - Ma determined by normalizing available quarterly data to 4 full quarters

LA = annual investigation level dose (mrem)

ND = not detected Section 3 - Page 23

3.9 LAND USE CENSUS The Land Use Census was conducted during the growing season (5/12 - 5/13/2014) 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 2014 Land Use Census Results Sector Distance Sector Distance (Miles) (Miles)

Nearest Residence 2.98 Nearest Residence 1.96 N Nearest Milk Animal - S Nearest Milk Animal -

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

Nearest Residence 1.20 Nearest Residence 1.31 NE Nearest Milk Animal - SW Nearest Milk Animal -

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

Nearest Residence 1.64 Nearest Residence 1.58 E Nearest Milk Animal - W Nearest Milk Animal -

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

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

Nearest Residence 1.54 Nearest Residence 1.03 SSE Nearest Milk Animal - NNW Nearest Milk Animal -

- indicates no occurrences within the 5 mile radius

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

Section 3 - Page 24

Figure 3.9 Section 3 - Page 25

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 2014 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 milk, airborne radioiodine or airborne particulate samples. Naturally occurring K-40 and Be-7 were detected in some samples but were not included in any REMP-based dose estimates. Dose estimates were not calculated for surface water samples because surface water is not considered a potable drinking water source although surface water tritium concentrations are used in calculating doses from fish. REMP TLD exposure results are discussed in Section 3.8.

The maximum environmental organ dose estimate for any single sample type (excluding TLD results) collected during 2014 was 4.58E-2 mrem to the child liver from the consumption of drinking water.

4.2 ESTIMATED DOSE FROM RELEASES Throughout the year, dose estimates were calculated based on actual 2014 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 reported in the Annual Radioactive Effluent Release Report.

Section 4 - Page 1

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 and drinking water were the predominant dose pathways based on environmental and effluent samples. The maximum total organ dose based on 2014 environmental sample results was 4.58E-2 mrem to the child liver. The maximum total organ dose of 1.62E-1 mrem for liquid effluent-based estimates was to the child liver.

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 vegetation. The maximum total organ dose for gaseous effluent estimates was 3.39E-1 mrem to the child bone. 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.

Section 4 - Page 2

TABLE 4.1-A Page 1 of 2 OCONEE NUCLEAR STATION 2014 ENVIRONMENTAL AND EFFLUENT DOSE COMPARISON LIQUID RELEASE PATHWAY Environmental Critical Critical Maximum Dose (3)

Organ or Location Age (1) Pathway (2) (mrem)

Effluent Data Skin Environmental Teen Shoreline Sediment 067 (4.34 mi SSE) 5.54E-05 Skin Effluent Teen Shoreline Sediment Discharge Pt. 8.51E-04 Bone Environmental Child Fresh Water Fish 063 (0.80 mi ESE) 1.17E-02 Bone Effluent Child Fresh Water Fish Discharge Pt. 6.20E-02 Liver Environmental Child Drinking Water 066 (18.9 mi SSE) 4.58E-02 Liver Effluent Child Drinking Water 18.9 mi SSE 1.62E-01 T. Body Environmental Adult Drinking Water 066 (18.9 mi SSE) 3.71E-02 T. Body Effluent Adult Fresh Water Fish Discharge Pt. 1.46E-01 Thyroid Environmental Child Drinking Water 066 (18.9 mi SSE) 3.46E-02 Thyroid Effluent Child Drinking Water 18.9 mi SSE 1.22E-01 Kidney Environmental Child Drinking Water 066 (18.9 mi SSE) 3.83E-02 Kidney Effluent Child Drinking Water 18.9 mi SSE 1.34E-01 Lung Environmental Child Drinking Water 066 (18.9 mi SSE) 3.59E-02 Lung Effluent Child Drinking Water 18.9 mi SSE 1.26E-01 GI-LLI Environmental Child Drinking Water 066 (18.9 mi SSE) 3.47E-02 GI-LLI Effluent Adult Drinking Water 18.9 mi SSE 1.31E-01 (1) Critical Age is the highest total dose (all pathways) to an age group.

(2) Critial Pathway is the highest individual dose within the identified Critical Age group.

(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 (1) Pathway (2) (mrem)

Skin Environmental - - - 0.00E+00 Skin Effluent All Ground Plane 1.0 mi. SW 6.24E-06 Bone Environmental - - - 0.00E+00 Bone Effluent Child Vegetation 1.0 mi. SW 3.39E-01 Liver Environmental - - - 0.00E+00 Liver Effluent Child Vegetation 1.0 mi. SW 1.25E-01 T. Body Environmental - - - 0.00E+00 T. Body Effluent Child Vegetation 1.0 mi. SW 1.25E-01 Thyroid Environmental - - - 0.00E+00 Thyroid Effluent Child Vegetation 1.0 mi. SW 1.25E-01 Kidney Environmental - - - 0.00E+00 Kidney Effluent Child Vegetation 1.0 mi. SW 1.25E-01 Lung Environmental - - - 0.00E+00 Lung Effluent Child Vegetation 1.0 mi. SW 1.25E-01 GI-LLI Environmental - - - 0.00E+00 GI-LLI Effluent Child Vegetation 1.0 mi. SW 1.25E-01 (1) Critical Age is the highest total dose (all pathways) to an age group.

(2) Critial Pathway is the highest individual dose within the identified Critical Age group.

(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 2014 based on Environmental Measurements (mrem) for Oconee Nuclear Station Age Sample Medium Bone Liver T. Body Thyroid Kidney Lung GI-LLI Skin Infant Airborne 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Drinking Water 0.00E+00 2.97E-02 2.97E-02 2.97E-02 2.97E-02 2.97E-02 2.97E-02 0.00E+00 Milk 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 TOTAL 0.00E+00 2.97E-02 2.97E-02 2.97E-02 2.97E-02 2.97E-02 2.97E-02 0.00E+00 Child Airborne 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Drinking Water 0.00E+00 3.02E-02 3.02E-02 3.02E-02 3.02E-02 3.02E-02 3.02E-02 0.00E+00 Milk 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Broadleaf Vegetation 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Fish 1.17E-02 1.56E-02 6.06E-03 4.40E-03 8.05E-03 5.72E-03 4.47E-03 0.00E+00 Shoreline Sediment 0.00E+00 0.00E+00 9.93E-06 0.00E+00 0.00E+00 0.00E+00 0.00E+00 1.16E-05 TOTAL 1.17E-02 4.58E-02 3.63E-02 3.46E-02 3.83E-02 3.59E-02 3.47E-02 1.16E-05 Teen Airborne 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Drinking Water 0.00E+00 1.58E-02 1.58E-02 1.58E-02 1.58E-02 1.58E-02 1.58E-02 0.00E+00 Milk 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Broadleaf Vegetation 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Fish 9.28E-03 1.77E-02 9.63E-03 5.33E-03 9.53E-03 6.96E-03 5.51E-03 0.00E+00 Shoreline Sediment 0.00E+00 0.00E+00 4.75E-05 0.00E+00 0.00E+00 0.00E+00 0.00E+00 5.54E-05 TOTAL 9.28E-03 3.35E-02 2.55E-02 2.11E-02 2.53E-02 2.28E-02 2.13E-02 5.54E-05 Adult Airborne 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Drinking Water 0.00E+00 2.24E-02 2.24E-02 2.24E-02 2.24E-02 2.24E-02 2.24E-02 0.00E+00 Milk 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Broadleaf Vegetation 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Fish 8.67E-03 1.88E-02 1.47E-02 6.93E-03 1.10E-02 8.27E-03 7.16E-03 0.00E+00 Shoreline Sediment 0.00E+00 0.00E+00 8.51E-06 0.00E+00 0.00E+00 0.00E+00 0.00E+00 9.93E-06 TOTAL 8.67E-03 4.12E-02 3.71E-02 2.93E-02 3.34E-02 3.07E-02 2.96E-02 9.93E-06 Note: Dose tables are provided for sample media displaying positive nuclide occurrence.

Section 4 - Page 5

Oconee Nuclear Station Dose from Drinking Water Pathway for 2014 Data Maximum Exposed Infant Infant Dose from Drinking Water Pathway (mrem) = Usage (l) x Dose Factor (mrem/pCi ingested) x Concentration (pCi/l)

Usage (intake in one year) = 330 l Highest Annual Net Mean Ingestion Dose Factor Concentration Dose (mrem)

Indicator Water Radionuclide Bone Liver T. Body Thyroid Kidney Lung GI-LLI Location (pCi/l) Bone Liver T. Body Thyroid Kidney Lung GI-LLI Mn-54 NO DATA 1.99E-05 4.51E-06 NO DATA 4.41E-06 NO DATA 7.31E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Co-58 NO DATA 3.60E-06 8.98E-06 NO DATA NO DATA NO DATA 8.97E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Fe-59 3.08E-05 5.38E-05 2.12E-05 NO DATA NO DATA 1.59E-05 2.57E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Co-60 NO DATA 1.08E-05 2.55E-05 NO DATA NO DATA NO DATA 2.57E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Zn-65 1.84E-05 6.31E-05 2.91E-05 NO DATA 3.06E-05 NO DATA 5.33E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Nb-95 4.20E-08 1.73E-08 1.00E-08 NO DATA 1.24E-08 NO DATA 1.46E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Zr-95 2.06E-07 5.02E-08 3.56E-08 NO DATA 5.41E-08 NO DATA 2.50E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 I-131 3.59E-05 4.23E-05 1.86E-05 1.39E-02 4.94E-05 NO DATA 1.51E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cs-134 3.77E-04 7.03E-04 7.10E-05 NO DATA 1.81E-04 7.42E-05 1.91E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cs-137 5.22E-04 6.11E-04 4.33E-05 NO DATA 1.64E-04 6.64E-05 1.91E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 BaLa-140 1.71E-04 1.71E-07 8.81E-06 NO DATA 4.06E-08 1.05E-07 4.20E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 H-3 NO DATA 3.08E-07 3.08E-07 3.08E-07 3.08E-07 3.08E-07 3.08E-07 066 292 0.00E+00 2.97E-02 2.97E-02 2.97E-02 2.97E-02 2.97E-02 2.97E-02 Dose Commitment (mrem) = 0.00E+00 2.97E-02 2.97E-02 2.97E-02 2.97E-02 2.97E-02 2.97E-02 Section 4 - Page 6

Oconee Nuclear Station Dose from Drinking Water Pathway for 2014 Data Maximum Exposed Child Child Dose from Drinking Water Pathway (mrem) = Usage (l) x Dose Factor (mrem/pCi ingested) x Concentration (pCi/l)

Usage (intake in one year)= 510 l Highest Annual Net Mean Ingestion Dose Factor Concentration Dose (mrem)

Indicator Water Radionuclide Bone Liver T. Body Thyroid Kidney Lung GI-LLI Location (pCi/l) Bone Liver T. Body Thyroid Kidney Lung GI-LLI Mn-54 NO DATA 1.07E-05 2.85E-06 NO DATA 3.00E-06 NO DATA 8.98E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Co-58 NO DATA 1.80E-06 5.51E-06 NO DATA NO DATA NO DATA 1.05E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Fe-59 1.65E-05 2.67E-05 1.33E-05 NO DATA NO DATA 7.74E-06 2.78E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 C0-60 NO DATA 5.29E-06 1.56E-05 NO DATA NO DATA NO DATA 2.93E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Zn-65 1.37E-05 3.65E-05 2.27E-05 NO DATA 2.30E-05 NO DATA 6.41E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 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+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Zr-95 1.16E-07 2.55E-08 2.27E-08 NO DATA 3.65E-08 NO DATA 2.66E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 I-131 1.72E-05 1.73E-05 9.83E-06 5.72E-03 2.84E-05 NO DATA 1.54E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cs-134 2.34E-04 3.84E-04 8.10E-05 NO DATA 1.19E-04 4.27E-05 2.07E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cs-137 3.27E-04 3.13E-04 4.62E-05 NO DATA 1.02E-04 3.67E-05 1.96E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 BaLa-140 8.31E-05 7.28E-08 4.85E-06 NO DATA 2.37E-08 4.34E-08 4.21E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 H-3 NO DATA 2.03E-07 2.03E-07 2.03E-07 2.03E-07 2.03E-07 2.03E-07 066 292 0.00E+00 3.02E-02 3.02E-02 3.02E-02 3.02E-02 3.02E-02 3.02E-02 Dose Commitment (mrem) = 0.00E+00 3.02E-02 3.02E-02 3.02E-02 3.02E-02 3.02E-02 3.02E-02 Section 4 - Page 7

Oconee Nuclear Station Dose from Fish Pathway for 2014 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/l x Bioaccumulation Factor 0.9 pCi/kg per pCi/l = 3493 pCi/l x 0.9 = 3144 pCi/kg Usage (intake in one year) = 6.9 kg Highest Annual Net Mean Ingestion Dose Factor Concentration Dose (mrem)

Indicator Fish Radionuclide Bone Liver T. Body Thyroid Kidney Lung GI-LLI Location (pCi/kg) Bone Liver T. Body Thyroid Kidney Lung GI-LLI Mn-54 NO DATA 1.07E-05 2.85E-06 NO DATA 3.00E-06 NO DATA 8.98E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Co-58 NO DATA 1.80E-06 5.51E-06 NO DATA NO DATA NO DATA 1.05E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Fe-59 1.65E-05 2.67E-05 1.33E-05 NO DATA NO DATA 7.74E-06 2.78E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 C0-60 NO DATA 5.29E-06 1.56E-05 NO DATA NO DATA NO DATA 2.93E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Zn-65 1.37E-05 3.65E-05 2.27E-05 NO DATA 2.30E-05 NO DATA 6.41E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cs-134 2.34E-04 3.84E-04 8.10E-05 NO DATA 1.19E-04 4.27E-05 2.07E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cs-137 3.27E-04 3.13E-04 4.62E-05 NO DATA 1.02E-04 3.67E-05 1.96E-06 063 5.18 1.17E-02 1.12E-02 1.65E-03 0.00E+00 3.65E-03 1.31E-03 7.01E-05 H-3 NO DATA 2.03E-07 2.03E-07 2.03E-07 2.03E-07 2.03E-07 2.03E-07 063 3144 0.00E+00 4.40E-03 4.40E-03 4.40E-03 4.40E-03 4.40E-03 4.40E-03 Dose Commitment (mrem) = 1.17E-02 1.56E-02 6.06E-03 4.40E-03 8.05E-03 5.72E-03 4.47E-03 Section 4 - Page 8

Oconee Nuclear Station Dose from Shoreline Sediment Pathway for 2014 Data Maximum Exposed Child Shoreline Recreation = 14 hr (in one year)

Shore Width Factor = 0.2 Sediment Surface Mass = 40 kg/m2 Child Dose from Shoreline Sediment Pathway (mrem) = Shoreline Recreation (hr) x External Dose Factor (mrem/hr per pCi/m2) x Shore Width Factor x Sediment Surface Mass (kg/m2) x Sediment Concentration (pCi/kg)

External Dose Factor Standing Highest Annual Net Dose on Contaminated Ground Mean Concentration (mrem/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 0.00E+00 0.00E+00 Cs-137 4.20E-09 4.90E-09 067 21.1 9.93E-06 1.16E-05 Dose Commitment (mrem) = 9.93E-06 1.16E-05 Section 4 - Page 9

Oconee Nuclear Station Dose from Drinking Water Pathway for 2014 Data Maximum Exposed Teen Teen Dose from Drinking Water Pathway (mrem) = Usage (l) x Dose Factor (mrem/pCi ingested) x Concentration (pCi/l)

Usage (intake in one year)= 510 l Highest Annual Net Mean Ingestion Dose Factor Concentration Dose (mrem)

Indicator Water Radionuclide Bone Liver T. Body Thyroid Kidney Lung GI-LLI Location (pCi/l) Bone Liver T. Body Thyroid Kidney Lung GI-LLI Mn-54 NO DATA 5.90E-06 1.17E-06 NO DATA 1.76E-06 NO DATA 1.21E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Co-58 NO DATA 9.72E-07 2.24E-06 NO DATA NO DATA NO DATA 1.34E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Fe-59 5.87E-06 1.37E-05 5.29E-06 NO DATA NO DATA 4.32E-06 3.24E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Co-60 NO DATA 2.81E-06 6.33E-06 NO DATA NO DATA NO DATA 3.66E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Zn-65 5.76E-06 2.00E-05 9.33E-06 NO DATA 1.28E-05 NO DATA 8.47E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Nb-95 8.22E-09 4.56E-09 2.51E-09 NO DATA 4.42E-09 NO DATA 1.95E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Zr-95 4.12E-08 1.30E-08 8.94E-09 NO DATA 1.91E-08 NO DATA 3.00E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 I-131 5.85E-06 8.19E-06 4.40E-06 2.39E-03 1.41E-05 NO DATA 1.62E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cs-134 8.37E-05 1.97E-04 9.14E-05 NO DATA 6.26E-05 2.39E-05 2.45E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cs-137 1.12E-04 1.49E-04 5.19E-05 NO DATA 5.07E-05 1.97E-05 2.12E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 BaLa-140 2.84E-05 3.48E-08 1.83E-06 NO DATA 1.18E-08 2.34E-08 4.38E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 H-3 NO DATA 1.06E-07 1.06E-07 1.06E-07 1.06E-07 1.06E-07 1.06E-07 066 292 0.00E+00 1.58E-02 1.58E-02 1.58E-02 1.58E-02 1.58E-02 1.58E-02 Dose Commitment (mrem)= 0.00E+00 1.58E-02 1.58E-02 1.58E-02 1.58E-02 1.58E-02 1.58E-02 Section 4 - Page 10

Oconee Nuclear Station Dose from Fish Pathway for 2014 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/l x Bioaccumulation Factor 0.9 pCi/kg per pCi/l = 3493 pCi/l x 0.9 = 3144 pCi/kg Usage (intake in one year) = 16 kg Highest Annual Ingestion Dose Factor Net Mean Dose (mrem)

Concentration Radionuclide Bone Liver T. Body Thyroid Kidney Lung GI-LLI Location (pCi/kg) Bone Liver T. Body Thyroid Kidney Lung GI-LLI Mn-54 NO DATA 5.90E-06 1.17E-06 NO DATA 1.76E-06 NO DATA 1.21E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Co-58 NO DATA 9.72E-07 2.24E-06 NO DATA NO DATA NO DATA 1.34E-05 ALL 0.0 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Fe-59 5.87E-06 1.37E-05 5.29E-06 NO DATA NO DATA 4.32E-06 3.24E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Co-60 NO DATA 2.81E-06 6.33E-06 NO DATA NO DATA NO DATA 3.66E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Zn-65 5.76E-06 2.00E-05 9.33E-06 NO DATA 1.28E-05 NO DATA 8.47E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cs-134 8.37E-05 1.97E-04 9.14E-05 NO DATA 6.26E-05 2.39E-05 2.45E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cs-137 1.12E-04 1.49E-04 5.19E-05 NO DATA 5.07E-05 1.97E-05 2.12E-06 063 5.18 9.28E-03 1.23E-02 4.30E-03 0.00E+00 4.20E-03 1.63E-03 1.76E-04 H-3 NO DATA 1.06E-07 1.06E-07 1.06E-07 1.06E-07 1.06E-07 1.06E-07 063 3144 0.00E+00 5.33E-03 5.33E-03 5.33E-03 5.33E-03 5.33E-03 5.33E-03 Dose Commitment (mrem) = 9.28E-03 1.77E-02 9.63E-03 5.33E-03 9.53E-03 6.96E-03 5.51E-03 Section 4 - Page 11

Oconee Nuclear Station Dose from Shoreline Sediment Pathway for 2014 Data Maximum Exposed Teen Shoreline Recreation = 67 hr (in one year)

Shore Width Factor = 0.2 2

Sediment Surface Mass = 40 kg/m Teen Dose from Shoreline Sediment Pathway (mrem) = Shoreline Recreation (hr) x External Dose Factor (mrem/hr per pCi/m2) x Shore Width Factor x Sediment Surface Mass (kg/m2) x Sediment Concentration (pCi/kg)

External Dose Factor Standing Highest Annual Net Dose on Contaminated Ground Mean Concentration (mrem/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 0.00E+00 0.00E+00 Cs-137 4.20E-09 4.90E-09 067 21.1 4.75E-05 5.54E-05 Dose Commitment (mrem) = 4.75E-05 5.54E-05 Section 4 - Page 12

Oconee Nuclear Station Dose from Drinking Water Pathway for 2014 Data Maximum Exposed Adult Adult Dose from Drinking Water Pathway (mrem) = Usage (l) x Dose Factor (mrem/pCi ingested) x Concentration (pCi/l)

Usage (intake in one year) = 730 l Highest Annual Net Mean Ingestion Dose Factor Concentration Dose (mrem)

Indicator Water Radionuclide Bone Liver T. Body Thyroid Kidney Lung GI-LLI Location (pCi/l) 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 1.40E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Co-58 NO DATA 7.45E-07 1.67E-06 NO DATA NO DATA NO DATA 1.51E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Fe-59 4.34E-06 1.02E-05 3.91E-06 NO DATA NO DATA 2.85E-06 3.40E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Co-60 NO DATA 2.14E-06 4.72E-06 NO DATA NO DATA NO DATA 4.02E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Zn-65 4.84E-06 1.54E-05 6.96E-06 NO DATA 1.03E-05 NO DATA 9.70E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Nb-95 6.22E-09 3.46E-09 1.86E-09 NO DATA 3.42E-09 NO DATA 2.10E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Zr-95 3.04E-08 9.75E-09 6.60E-09 NO DATA 1.53E-08 NO DATA 3.09E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 I-131 4.16E-06 5.95E-06 3.41E-06 1.95E-03 1.02E-05 NO DATA 1.57E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cs-134 6.22E-05 1.48E-04 1.21E-04 NO DATA 4.79E-05 1.59E-05 2.59E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cs-137 7.97E-05 1.09E-04 7.14E-05 NO DATA 3.70E-05 1.23E-05 2.11E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 BaLa-140 2.03E-05 2.55E-08 1.33E-06 NO DATA 8.67E-09 1.46E-08 4.18E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 H-3 NO DATA 1.05E-07 1.05E-07 1.05E-07 1.05E-07 1.05E-07 1.05E-07 066 292 0.00E+00 2.24E-02 2.24E-02 2.24E-02 2.24E-02 2.24E-02 2.24E-02 Dose Commitment (mrem) = 0.00E+00 2.24E-02 2.24E-02 2.24E-02 2.24E-02 2.24E-02 2.24E-02 Section 4 - Page 13

Oconee Nuclear Station Dose from Fish Pathway for 2014 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/l x Bioaccumulation Factor 0.9 pCi/kg per pCi/l = 3493 pCi/l x 0.9 = 3144 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 GI-LLI Location (pCi/kg) 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 1.40E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Co-58 NO DATA 7.45E-07 1.67E-06 NO DATA NO DATA NO DATA 1.51E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Fe-59 4.34E-06 1.02E-05 3.91E-06 NO DATA NO DATA 2.85E-06 3.40E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Co-60 NO DATA 2.14E-06 4.72E-06 NO DATA NO DATA NO DATA 4.02E-05 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Zn-65 4.84E-06 1.54E-05 6.96E-06 NO DATA 1.03E-05 NO DATA 9.70E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cs-134 6.22E-05 1.48E-04 1.21E-04 NO DATA 4.79E-05 1.59E-05 2.59E-06 ALL 0.00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Cs-137 7.97E-05 1.09E-04 7.14E-05 NO DATA 3.70E-05 1.23E-05 2.11E-06 063 5.18 8.67E-03 1.19E-02 7.77E-03 0.00E+00 4.02E-03 1.34E-03 2.30E-04 H-3 NO DATA 1.05E-07 1.05E-07 1.05E-07 1.05E-07 1.05E-07 1.05E-07 063 3144 0.00E+00 6.93E-03 6.93E-03 6.93E-03 6.93E-03 6.93E-03 6.93E-03 Dose Commitment (mrem) = 8.67E-03 1.88E-02 1.47E-02 6.93E-03 1.10E-02 8.27E-03 7.16E-03 Section 4 - Page 14

Oconee Nuclear Station Dose from Shoreline Sediment Pathway for 2014 Data Maximum Exposed Adult Shoreline Recreation = 12 hr (in one year)

Shore Width Factor = 0.2 2

Sediment Surface Mass = 40 kg/m Adult Dose from Shoreline Sediment Pathway (mrem) = Shoreline Recreation (hr) x External Dose Factor (mrem/hr per pCi/m2) x Shore Width Factor x Sediment Surface Mass (kg/m2) x Sediment Concentration (pCi/kg)

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

(mrem/hr per pCi/m2) Indicator Sediment Radionuclide T. Body Skin Location (pCi/kg) T. Body Skin Cs-134 1.20E-08 1.40E-08 ALL 0.00 0.00E+00 0.00E+00 Cs-137 4.20E-09 4.90E-09 067 21.1 8.51E-06 9.93E-06 Dose Commitment (mrem) = 8.51E-06 9.93E-06 Section 4 - Page 15

5.0 QUALITY ASSURANCE 5.1 SAMPLE COLLECTION EnRad Laboratories, Fisheries, and Aquatic Ecology performed the environmental sample collections as specified by approved sample collection procedures.

5.2 SAMPLE ANALYSIS EnRad Laboratories performed the environmental sample analyses as specified by approved analysis procedures. EnRad Laboratories is located in Huntersville, North Carolina, at Duke Energys Environmental Center.

5.3 DOSIMETRY ANALYSIS The Radiation Dosimetry and Records group performed environmental 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 gross beta in drinking water and tritium analyses.

5.5 DUKE ENERGY INTERLABORATORY COMPARISON PROGRAM In 2014 Duke Energy Environmental Laboratory (EnRad) participated in interlaboratory programs to satisfy Radiological Environmental Monitoring Program requirements in Section 5 - Page 1

Duke Energy nuclear plant Offsite Dose Calculation Manuals and Selected Licensee Commitments Manuals, as applicable. In addition, EnRad Laboratory participated in the Environmental Resource Associates (ERA) RadCheMTM Proficiency Testing program to satisfy the 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. ERA reported results were evaluated based on National Environmental Laboratory Accreditation Conference (NELAC) Field of Proficiency Testing criteria. FSS results were evaluated as prescribed in the Duke Energy Nuclear Generation Procedure SRPMP 9-2.

A low-level Iodine-131 in water cross check was not performed during 2014, but was performed during 2013. A low-level Iodine-131 in milk cross check was performed during 2014. The preparation and analysis of both media (milk and water) for the low-level Iodine-131 analysis is accomplished using the EnRad procedure 54, Preparation of Samples for low-level I-131 Analysis. Low-level Iodine-131 sample preparation and testing for both media is a similar process. A low-level Iodine-131 cross check in water is scheduled for the second quarter 2015 cross check program. Low-level Iodine-131 analysis of water was not required during 2014 since the dose calculated for the consumption of the water was not greater than 1 mrem per year in any supported program (PIP G-15-00781 or CR # 744148).

5.5.1 DUKE ENERGY INTERCOMPARISON PROGRAM EnRad Laboratories participated in the Duke Energy Fleet Scientific Services (FSS) Intercomparison Program during 2014. Interlaboratory cross-check samples, including gamma in water (Marinelli beakers), low-level I-131 in milk, and tritium in water samples were analyzed during 2014. A summary of the EnRad Laboratory program results for 2014 is documented in Table 5.0-A.

5.5.2 ECKERT & ZIEGLER ANALYTICS CROSS CHECK PROGRAM EnRad Laboratories participated in the Eckert & Ziegler Analytics Cross Check Program during 2014. Cross-check samples including air filters, air cartridges, gross beta in water, various gamma samples in Marinelli beakers (soil, vegetation, and milk), and Iodine in milk samples were analyzed at various times of the year.

A summary of the EnRad Laboratory program results for 2014 is documented in Table 5.0-B.

5.5.3 ERA PROFICIENCY TESTING EnRad Laboratories performed method proficiency testing through a program administered by Environmental Resource Associates (ERA) of Arvada, CO. ERA supplied requested method proficiency samples for analysis and nuclide concentration determination. ERA reported proficiency test results to the North Section 5 - Page 2

Carolina Department of Health and Human Services, North Carolina Public Health Drinking Water Laboratory Certification Program. A summary of these proficiency test data for 2014 is documented in Table 5.0-C.

5.6 DUKE ENERGY AUDITS The Oconee Nuclear Station Radiological Environmental Monitoring Program was audited by the Quality Assurance Group in 2014. No environmental monitoring issues were identified.

5.7 U.S. NUCLEAR REGULATORY COMMISSION INSPECTIONS The Oconee Nuclear Station Radiological Environmental Monitoring Program was audited by the NRC in 2014. No findings were noted in the 2014 report.

5.8 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.

5.9 TLD INTERCOMPARISON PROGRAM 5.9.1 NUCLEAR TECHNOLOGY SERVICES INTERCOMPARISON PROGRAM Radiation Dosimetry and Records participates in a quarterly TLD intercomparison program administered by Nuclear Technology Services, Inc. of Roswell, GA.

Nuclear Technology Services irradiates environmental dosimeters quarterly and sends them to the Radiation Dosimetry and Records group for analysis of the unknown estimated delivered exposure. A summary of the 2014 Nuclear Technology Services Intercomparison 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. Complete documentation of any evaluation will be available and provided to the NRC upon request.

5.9.2 INTERNAL CROSSCHECK (DUKE ENERGY)

Radiation Dosimetry and Records participates in a quarterly TLD intracomparison program administered internally by the Dosimetry Lab. The Dosimetry Lab Staff irradiates environmental dosimeters quarterly and submits them for analysis of the unknown estimated delivered exposure. A summary of the 2014 Internal Cross Check (Duke Energy) Result is documented in Table 5.0-D.

Section 5 - Page 3

TABLE 5.0-A DUKE ENERGY INTERLABORATORY COMPARISON PROGRAM 2014 EnRad Fleet Scientific Services Cross Check Performance Summary Cross check samples were distributed by Fleet Scientific Services (FSS) in accordance with Duke Energy Nuclear Generation Procedure SRPMP 9-2. Seven water samples were analyzed for tritium and gamma emitters, while three milk samples were analyzed for low-level I-131. The below table lists results for specific analyses. Fifty- eight results were evaluated as prescribed in procedure SRPMP 9-2. The acceptance criteria for the program was based on the NRC Inspection Manual Procedure 84750 (IP 84750). These results passed the acceptance criteria for the program.

EnRad FSS EnRad/FSS Sample Sample ID Nuclide Quarter Units Evaluation Value Value Ratio Milk LLI-131 3 pCi/L 3.04E+03 2.96E+03 1.03 Agreement 3 pCi/L 3.06E+03 2.96E+03 1.03 Agreement Q143LIM1 I-131 3 pCi/L 3.07E+03 2.96E+03 1.04 Agreement 3 pCi/L 1.25E+03 1.27E+03 0.98 Agreement Q143LIM2 I-131 3 pCi/L 1.25E+03 1.27E+03 0.98 Agreement 3 pCi/L 1.24E+03 1.27E+03 0.97 Agreement 3 pCi/L 4.64E+02 4.58E+02 1.01 Agreement Q143LIM3 I-131 3 pCi/L 4.70E+02 4.58E+02 1.03 Agreement Tritium in Water Q143TWR1 H-3 3 pCi/L 1.77E+03 1.85E+03 0.96 Agreement 3 pCi/L 1.79E+03 1.85E+03 0.97 Agreement 3 pCi/L 1.78E+03 1.85E+03 0.96 Agreement Q143TWR2 H-3 3 pCi/L 1.76E+05 1.81E+05 0.97 Agreement 3 pCi/L 1.75E+05 1.81E+05 0.96 Agreement Tritium in Water Q141TWR1 H-3 1 pCi/L 1.10E+03 1.05E+03 1.05 Agreement 1.14E+03 1.05E+03 1.09 Agreement 1.11E+03 1.05E+03 1.06 Agreement Q141TWR2 H-3 1 pCi/L 7.04E+03 7.46E+03 0.94 Agreement 7.03E+03 7.46E+03 0.94 Agreement 7.16E+03 7.46E+03 0.96 Agreement Q141TWR3 H-3 1 pCi/L 3.13E+03 3.21E+03 0.98 Agreement 3.11E+03 3.21E+03 0.97 Agreement 3.13E+03 3.21E+03 0.98 Agreement Section 5 - Page 4

TABLE 5.0-A (Cont.)

EnRad FSS EnRad/FSS Sample Sample ID Nuclide Quarter Units Evaluation Value Value Ratio Gamma in Water Q143GWSL-1.0 L Cr-51 3 pCi/L 1.71E+05 1.80E+05 0.95 Agreement 3 pCi/L 1.70E+05 1.80E+05 0.95 Agreement Mn-54 3 pCi/L 6.34E+04 5.99E+04 1.06 Agreement 3 pCi/L 6.35E+04 5.99E+04 1.06 Agreement Co-58 3 pCi/L 6.80E+04 6.89E+04 0.99 Agreement 3 pCi/L 6.81E+04 6.89E+04 0.99 Agreement Fe-59 3 pCi/L 8.72E+04 8.38E+04 1.04 Agreement 3 pCi/L 8.75E+04 8.38E+04 1.04 Agreement Co-60 3 pCi/L 1.27E+05 1.22E+05 1.04 Agreement 3 pCi/L 1.26E+05 1.22E+05 1.03 Agreement Zn-65 3 pCi/L 3.52E+04 3.12E+04 1.13 Agreement 3 pCi/L 3.53E+04 3.12E+04 1.13 Agreement Cs-134 3 pCi/L 5.97E+04 6.35E+04 0.91 Agreement 3 pCi/L 5.95E+04 6.53E+04 0.91 Agreement Cs-137 3 pCi/L 8.01E+04 7.87E+04 1.02 Agreement 3 pCi/L 7.98E+04 7.87E+04 1.01 Agreement Ce-141 3 pCi/L 7.13E+04 7.65E+04 0.93 Agreement 3 pCi/L 7.24E+04 7.65E+04 0.95 Agreement Q143GWSL-3.5 L Cr-51 3 pCi/L 1.76E+05 1.80E+05 0.98 Agreement 3 pCi/L 1.73E+05 1.80E+05 0.96 Agreement Mn-54 3 pCi/L 6.32E+04 5.99E+04 1.06 Agreement 3 pCi/L 6.31E+04 5.99E+04 1.05 Agreement Co-58 3 pCi/L 6.89E+04 6.89E+04 1.00 Agreement 3 pCi/L 6.84E+04 6.89E+04 0.99 Agreement Fe-59 3 pCi/L 8.54E+04 8.38E+04 1.02 Agreement 3 pCi/L 8.69E+04 8.38E+04 1.04 Agreement Co-60 3 pCi/L 1.28E+05 1.22E+05 1.05 Agreement 3 pCi/L 1.27E+05 1.22E+05 1.04 Agreement Zn-65 3 pCi/L 3.42E+04 3.12E+04 1.10 Agreement 3 pCi/L 3.45E+04 3.12E+04 1.11 Agreement Cs-134 3 pCi/L 6.39E+04 6.53E+04 0.98 Agreement 3 pCi/L 6.17E+04 6.53E+04 0.95 Agreement Cs-137 3 pCi/L 8.11E+04 7.87E+04 1.03 Agreement 3 pCi/L 8.08E+04 7.87E+04 1.03 Agreement Ce-141 3 pCi/L 7.39E+04 7.65E+04 0.97 Agreement 3 pCi/L 7.36E+04 7.65E+04 0.96 Agreement Section 5 - Page 5

TABLE 5.0-B ECKERT & ZIEGLER ANALYTICS CROSS CHECK PROGRAM 2014 Cross Check Results for EnRad Laboratories Cross check samples are received, prepared, and analyzed in all four quarters of 2014. Results are reported directly to Eckert & Ziegler Analytics. Environmental cross check samples were analyzed in replicate, and the result closest to the mean is reported to Eckert & Ziegler Analytics. The acceptance criteria for the program was based on the NRC Inspection Manual Procedure 84750 (IP 84750). Fifty environmental results were reported, of which 49 (98%) met the acceptance criteria based on IP 84750.

EnRad EZA EnRad/EZA Sample Sample ID Nuclide Quarter Units Evaluation Value Value Ratio Beta Filter in E10901 Gross Beta 2 pCi 201 199 1.01 Agreement Planchet Gamma in Soil E10904 Ce-141 2 pCi/g 0.23 0.24 0.96 Agreement Cr-51 2 pCi/g 0.48 0.49 0.98 Agreement Cs-134 2 pCi/g 0.24 0.32 0.76 Non-Agreement*

Cs-137 2 pCi/g 0.27 0.31 0.86 Agreement Co-58 2 pCi/g 0.18 0.22 0.83 Agreement Mn-54 2 pCi/g 0.29 0.3 0.96 Agreement Fe-59 2 pCi/g 0.2 0.2 1.01 Agreement Zn-65 2 pCi/g 0.49 0.49 1.00 Agreement Co-60 2 pCi/g 0.41 0.44 0.94 Agreement I-131 in Milk E10801 I-131 1 pCi/L 93.8 99.8 0.94 Agreement Gross Beta in E10905 Gross Beta 2 pCi/L 265 249 1.06 Agreement Water I-131 Charcoal E10802 I-131 1 pCi 76.1 75.1 1.01 Agreement Cartridge Gamma in E10902 Ce-141 2 pCi/g 0.22 0.24 0.91 Agreement Vegetation (Coffee Cr-51 2 pCi/g 0.42 0.5 0.85 Agreement Grounds)

Cs-134 2 pCi/g 0.28 0.32 0.88 Agreement Cs-137 2 pCi/g 0.22 0.24 0.94 Agreement Co-58 2 pCi/g 0.21 0.22 0.96 Agreement Mn-54 2 pCi/g 0.28 0.3 0.92 Agreement Fe-59 2 pCi/g 0.19 0.2 0.95 Agreement Zn-65 2 pCi/g 0.44 0.49 0.89 Agreement Co-60 2 pCi/g 0.38 0.44 0.87 Agreement

See PIP G-14-01710 Section 5 - Page 6

TABLE 5.0-B (Cont.)

EnRad EZA EnRad/EZA Sample Sample ID Nuclide Quarter Units Evaluation Value Value Ratio Gamma in E10987 Ce-141 3 pCi 64.1 62.6 1.02 Agreement Composite Filter Cr-51 3 pCi 135 143 0.94 Agreement Cs-134 3 pCi 74.6 78.3 0.95 Agreement Cs-137 3 pCi 97.8 95.9 1.02 Agreement Co-58 3 pCi 71.7 71 1.01 Agreement Mn-54 3 pCi 69.5 70.4 0.99 Agreement Fe-59 3 pCi 86.8 78.4 1.11 Agreement Zn-65 3 pCi 37 36.2 1.02 Agreement Co-60 3 pCi 161 148 1.09 Agreement Gamma in Milk E10800 I-131 1 pCi/L 97.3 98.5 0.99 Agreement Ce-141 1 pCi/L 120 119 1.01 Agreement Cr-51 1 pCi/L 505 491 1.03 Agreement Cs-134 1 pCi/L 192 210 0.92 Agreement Cs-137 1 pCi/L 255 253 1.01 Agreement Co-58 1 pCi/L 274 268 1.02 Agreement Mn-54 1 pCi/L 314 297 1.06 Agreement Fe-59 1 pCi/L 232 219 1.06 Agreement Zn-65 1 pCi/L 318 323 0.99 Agreement Co-60 1 pCi/L 335 337 0.99 Agreement Gamma in Soil E11051 Ce-141 4 pCi/g 0.31 0.35 0.89 Agreement Cr-51 4 pCi/g 0.61 0.648 0.94 Agreement Cs-134 4 pCi/g 0.25 0.263 0.95 Agreement Cs-137 4 pCi/g 0.36 0.396 0.91 Agreement Co-58 4 pCi/g 0.19 0.208 0.91 Agreement Mn-54 4 pCi/g 0.35 0.36 0.97 Agreement Fe-59 4 pCi/g 0.27 0.279 0.97 Agreement Zn-65 4 pCi/g 0.46 0.474 0.97 Agreement Co-60 4 pCi/g 0.34 0.375 0.91 Agreement Section 5 - Page 7

TABLE 5.0-C ENVIRONMENTAL RESOURCE ASSOCIATES (ERA)

PROFICIENCY TESTING 2014 Proficiency Test Results for EnRad Laboratories North Carolina Department of Health and Human Services Laboratory Certification EnRad Laboratories Proficiency test samples are received, prepared, and analyzed in second and fourth quarters of 2014. 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.

EnRad ERA Acceptance Sample Sample ID Nuclide Quarter Units Evaluation Value Value Limits Gamma Emitters in RAD-97 Ba-133 2 pCi/L 87.51 87.9 74.0 - 96.7 Agreement Water Cs-134 2 pCi/L 41.01 44.3 35.5 - 48.7 Agreement Cs-137 2 pCi/L 85.47 89.1 80.2 - 101 Agreement Co-60 2 pCi/L 62.75 64.2 57.8 - 73.1 Agreement Zn-65 2 pCi/L 249.8 235 212 - 275 Agreement Gamma Emitters in RAD-99 Ba-133 4 pCi/L 46.9 49.1 40.3 - 54.5 Agreement Water Cs-134 4 pCi/L 81.7 89.8 73.7 - 98.8 Agreement Cs-137 4 pCi/L 96.9 98.8 88.9 - 111 Agreement Co-60 4 pCi/L 91 92.1 82.9 - 104 Agreement Zn-65 4 pCi/L 335 310 279 - 362 Agreement Tritium in Water RAD-97 H-3 2 pCi/L 8680 8770 7610 - 9650 Agreement RAD-99 H-3 4 pCi/L 6290 6880 5940 - 7570 Agreement Iodine-131 in RAD-97 I-131 2 pCi/L 25.9 25.7 21.3 - 30.3 Agreement Water RAD-99 I-131 4 pCi/L 20.4 20.3 16.8 - 24.4 Agreement Section 5 - Page 8

TABLE 5.0-D 2014 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 the Radiation Dosimetry and Records group for analysis of the unknown estimated delivered exposure. The individual measurements were evaluated and results falling outside the acceptable ratio criteria had an evaluation performed to identify any recommended remedial actions and to reduce anomalous errors. Complete documentation of any evaluation will be available and provided to the NRC upon request.

1st Quarter 2014 2nd Quarter 2014 TLD Reported Delivered Bias Pass/Fail TLD Reported Delivered Bias Pass/Fail Number (mR) (mR) (% diff) Criteria Pass/Fail Number (mR) (mR) (% diff) Criteria Pass/Fail 102403 93.2 90.40 3.12 <+/-15% Pass 102196 18.07 18.66 -3.16 <+/-15% Pass 103045 99.3 90.40 9.87 <+/-15% Pass 102193 19.44 18.66 4.18 <+/-15% Pass 103009 101.0 90.40 11.76 <+/-15% Pass 102192 17.28 18.66 -7.40 <+/-15% Pass 102243 90.3 90.40 -0.09 <+/-15% Pass 102176 17.70 18.66 -5.14 <+/-15% Pass 102858 97.9 90.40 8.33 <+/-15% Pass 102175 18.66 18.66 0.00 <+/-15% Pass Average Bias (B) 6.60 Average Bias (B) -2.30 Standard Deviation (S) 4.93 Standard Deviation (S) 4.53 Measure Performance lBl+S 11.53 <15% Pass Measure Performance lBl+S 6.83 <15% Pass 3rd Quarter 2014 4th Quarter 2014 TLD Reported Delivered Bias Pass/Fail TLD Reported Delivered Bias Pass/Fail Number (mR) (mR) (% diff) Criteria Pass/Fail Number (mR) (mR) (% diff) Criteria Pass/Fail 103705 70.04 69.7 0.49 <+/-15% Pass 101241 84.63 77.7 8.92 <+/-15% Pass 103704 69.36 69.7 -0.49 <+/-15% Pass 103494 87.46 77.7 12.56 <+/-15% Pass 103686 71.90 69.7 3.16 <+/-15% Pass 103229 88.45 77.7 13.84 <+/-15% Pass 103685 72.82 69.7 4.48 <+/-15% Pass 103493 89.19 77.7 14.79 <+/-15% Pass 103517 73.71 69.7 5.75 <+/-15% Pass 103044 91.02 77.7 17.14 <+/-15% **Fail Average Bias (B) 2.68 Average Bias (B) 13.45 Standard Deviation (S) 2.63 Standard Deviation (S) 3.04 Measure Performance lBl+S 5.31 <15% Pass Measure Performance lBl+S 16.49 <15% **Fail

- Refer to PIP G-15-00554 Section 5 - Page 9

TABLE 5.0-D (Cont.)

Internal Crosscheck (Duke Energy)

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

1st Quarter 2014 2nd Quarter 2014 TLD Reported Delivered Bias Pass/Fail TLD Reported Delivered Bias Pass/Fail Number (mR) (mR) (% diff) Criteria Pass/Fail Number (mR) (mR) (% diff) Criteria Pass/Fail 101221 30.14 32.7 -7.83 <+/-15% Pass 103635 22.36 21.8 2.57 <+/-15% Pass 102801 32.82 32.7 0.37 <+/-15% Pass 102777 22.93 21.8 5.18 <+/-15% Pass 100019 30.32 32.7 -7.28 <+/-15% Pass 103181 22.78 21.8 4.50 <+/-15% Pass 103173 32.14 32.7 -1.71 <+/-15% Pass 103218 22.82 21.8 4.68 <+/-15% Pass 100085 30.90 32.7 -5.50 <+/-15% Pass 103657 22.29 21.8 2.25 <+/-15% Pass 101024 30.92 32.7 -5.44 <+/-15% Pass 102927 21.90 21.8 0.46 <+/-15% Pass 100350 30.73 32.7 -6.02 <+/-15% Pass 103396 21.54 21.8 -1.19 <+/-15% Pass 102359 30.71 32.7 -6.09 <+/-15% Pass 102723 22.84 21.8 4.77 <+/-15% Pass 103174 30.26 32.7 -7.46 <+/-15% Pass 103394 22.47 21.8 3.07 <+/-15% Pass 101376 31.49 32.7 -3.70 <+/-15% Pass 103058 22.36 21.8 2.57 <+/-15% Pass Average Bias (B) -5.07 Average Bias (B) 2.89 Standard Deviation (S) 2.65 Standard Deviation (S) 2.05 Measure Performance lBl+S 7.72 <15% Pass Measure Performance lBl+S 4.93 <15% Pass 3rd Quarter 2014 4th Quarter 2014 TLD Reported Delivered Bias Pass/Fail TLD Reported Delivered Bias Pass/Fail Number (mR) (mR) (% diff) Criteria Pass/Fail Number (mR) (mR) (% diff) Criteria Pass/Fail 102737 47.05 43.6 7.91 <+/-15% Pass 102768 57.48 54.5 5.47 <+/-15% Pass 102750 46.06 43.6 5.64 <+/-15% Pass 103263 55.38 54.5 1.61 <+/-15% Pass 102773 48.32 43.6 10.83 <+/-15% Pass 103453 56.30 54.5 3.30 <+/-15% Pass 102824 45.81 43.6 5.07 <+/-15% Pass 102746 54.25 54.5 -0.46 <+/-15% Pass 102397 44.38 43.6 1.79 <+/-15% Pass 103656 56.09 54.5 2.92 <+/-15% Pass 102832 46.37 43.6 6.35 <+/-15% Pass 102482 53.50 54.5 -1.83 <+/-15% Pass 102725 47.00 43.6 7.80 <+/-15% Pass 103446 54.71 54.5 0.39 <+/-15% Pass 102481 45.21 43.6 3.69 <+/-15% Pass 103339 53.55 54.5 -1.74 <+/-15% Pass 102758 45.97 43.6 5.44 <+/-15% Pass 103582 53.97 54.5 -0.97 <+/-15% Pass 103120 46.87 43.6 7.50 <+/-15% Pass 103288 55.43 54.5 1.71 <+/-15% Pass Average Bias (B) 6.20 Average Bias (B) 1.04 Standard Deviation (S) 2.51 Standard Deviation (S) 2.40 Measure Performance lBl+S 8.71 <15% Pass Measure Performance lBl+S 3.44 <15% Pass Section 5 - Page 10

APPENDIX A ENVIRONMENTAL SAMPLING ANALYSIS PROCEDURES Appendix A - Page 1

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 performed by EnRad Laboratories, Dosimetry and Records, and Fisheries and Aquatic Ecology.

Section IV of this appendix describes the environmental sampling frequencies and analysis procedures by media type.

I. CHANGE OF SAMPLING PROCEDURES No changes were made to the sampling procedures during 2014.

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

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

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

Tritium analyses are performed quarterly by using low-level environmental liquid scintillation analysis technique on a Packard 2550 liquid scintillation system or Perkin-Elmer 2900TR liquid scintillation system. Tritium samples are distilled and batch processed with a laboratory fortified blank, matrix spike, matrix spike duplicate, and blank to verify instrument performance and sample preparation technique are acceptable.

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

Appendix A - Page 2

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

III. CHANGE OF ANALYSIS PROCEDURES REMP analytical results reporting with 2 Sigma error was initiated during 2014, replacing the 1 Sigma error reporting (PIP G-14-01981).

Low-level Iodine-131 (LLI-131) test components were modified to include only the LLI-131 component; all other components such as Berrylium-7 and Potassium-40 were removed (PIP G-14-02526).

Gamma spectroscopy milk Iodine-131 MDA requirement was removed from the GAMMAMILK analysis as the required low-level Iodine-131 (LLI-131) requirement is satisfied by the GAMMALLI LLI-131 preparation and testing procedure and gamma spectroscopy analysis (PIP G-14-02692).

The gamma spectroscopy system was replaced during 2014 (10JUL2014). Gamma spectroscopy system hardware, detector cooling apparatus, software, electronics, nuclide identification libraries, and analytical test matrix components for test matrices were modified (PIP G-15-000625).

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

Location 077 = Skimmer Wall (1.00 mi. SW)

Location 078.1 = Recreation Site (0.53 mi. WSW)

Location 079 = Keowee Dam (0.56 mi. NE)

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

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

Location 085 = Lake Services / Building B9125 (0.88 mi. NNW)

Appendix A - Page 3

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 performed 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 performed on the monthly composites. Tritium analysis was performed on the quarterly 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 performed 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 performed 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)

A.6 FISH Semiannual samples were collected and a gamma analysis was performed on the edible portions of each sample. The samples were collected from the locations listed below.

Location 060 = Greenville Water Intake Rd. (2.28 mi. NE)(Control)

Appendix A - Page 4

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

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

A.7 SHORELINE SEDIMENT Semiannual samples were collected and a gamma analysis was performed on each sample following the drying and removal of rocks and clams. The samples were collected from the locations listed below.

Location 063 = Lake Hartwell 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)

Thermoluminescent dosimeters (TLD) were collected quarterly at forty-two locations. A gamma exposure rate was determined 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 Nearest Milk-giving Animal (cow, goat, etc.) where milk is used for human consumption The census was conducted during the growing season 5/12 - 5/13/2014. Results are shown in Table 3.9. No changes were made to the sampling procedures during 2014 as a result of the 2014 census.

Appendix A - Page 5

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

APPENDIX B RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

OF RESULTS 2014 Appendix B - Page 1

OCONEE NUCLEAR STATION RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM DATA

SUMMARY

Oconee Nuclear Station Docket Numbers 50-269, 270, 287 Oconee County, South Carolina Calendar Year 2014 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(2) (3) 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 See Table 2.2-C 2.01E-2 (260/260) 084 2.11E-2 (52/52) 1.86E-2 (52/52) 0 (pCi/m3) 312(4) 9.82E 3.55E-2 (2.58 mi NNE) 1.32E 3.28E-2 9.53E 2.93E-2 0

Gamma See Table 2.2-C All less than LLD ----- ----- All less than LLD 24 Air Radioiodine Gamma 0 See Table 2.2-C All less than LLD ----- All less than LLD (pCi/m3) 312(4) -----

064 (6.67 mi SSW)

Drinking Water Gross Beta 4 1.33 (20/26) 066 1.43 (13/13) 1.12 (10/13) 0 (pCi/l) 39 0.72 - 2.34 (18.9 mi SSE) 0.82 - 2.34 0.76 - 1.74 Gamma See Table 2.2-C All less than LLD ----- ----- All less than LLD 0 39 0

Tritium 292 (2/8) 066 292 (2/4) All less than LLD 2000 12 223 - 361 (18.9 mi SSE) 223 - 361 Surface Water Gamma See Table 2.2-C All less than LLD ----- ----- All less than LLD 0 (pCi/l) 26 Tritium 2000 3493 (4/4) 063.1 3493 (4/4) All less than LLD 0 8 1420 - 6960 (0.79 mi E) 1420 - 6960 Milk Gamma See Table 2.2-C No Indicator Location 0 (pCi/l) ----- ----- All less than LLD 26 I-131 See 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 2014 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(2) (3) 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.

Broadleaf 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 13.4 (2/8) 063 14.0 (2/4) 8.82 (2/4)

Cs-137 150 10.2 - 17.7 (0.80 mi ESE) 10.2 - 17.7 7.44 - 10.2 Sediments--Shoreline Gamma See Table 2.2-C 0 All less than LLD (pCi/kg, dry) 6 21.1 (1/4) 067 21.1 (1/2)

Cs-137 180 21.1 - 21.1 (4.34 mi SSE) 21.1 - 21.1 058 (9.39 mi WSW)

TLD TLD Readout 21.4 (159/159) 27.2 (4/4) 081 (9.33 mi SE) 0

048 27.5 (8/8)

(mR per quarter) (5) 167(4) 12.5 - 29.6 24.2 - 29.2 (3.64 mi W) 22.2 - 34.9 Appendix B - Page 3

Footnotes to Appendix B

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

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

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

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

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

Appendix B - Page 4

APPENDIX C SAMPLING DEVIATIONS UNAVAILABLE ANALYSES Appendix C - Page 1

APPENDIX C OCONEE NUCLEAR STATION SAMPLING DEVIATIONS & UNAVAILABLE ANALYSES DEVIATION & UNAVAILABLE REASON CODES BF Blown Fuse PO Power Outage FZ Sample Frozen PS Pump out of service / Undergoing Repair IW Inclement Weather SL Sample Loss/Lost due to Lab Accident LC Line Clog to Sampler SM Motor / Rotor Seized OT Other TF Torn Filter PI Power Interrupt VN Vandalism PM Preventive Maintenance CN Construction C.1 SAMPLING DEVIATIONS Air Particulate and Air Radioiodines Scheduled Actual Description & Corrective Location Collection Dates Collection Dates Code Action to Prevent Recurrence Action Identity Power to sampling equipment interrupted for about 14.22 hours2.546296e-4 days <br />0.00611 hours <br />3.637566e-5 weeks <br />8.371e-6 months <br /> due to undetermined reason. Power was restored and no work request was necessary as a result of this 085 1/6 - 1/13/2014 1/6 - 1/13/2014 PI event. G-14-00078 C.2 UNAVAILABLE ANALYSES TLD Scheduled Description & Corrective Location Collection Dates Code Action to Prevent Recurrence Action Identity 043 12/17/2013 - 3/18/2014 VN TLD missing. 2nd quarter TLD placed. G-14-00645 Appendix C - Page 2

APPENDIX D ANALYTICAL DEVIATIONS No Analytical deviations were incurred for the 2014 Radiological Environmental Monitoring Program Appendix D - Page 1

APPENDIX E RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM RESULTS 2014 This appendix includes sample analysis report summaries and supportive data generated from each sample medium for 2014.

Appendix E - Page 1

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 280641 Sample Dates: 12/30/2013 - 1/6/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.00E-02 1.46E-03 3.19E-03 Sample ID: 280814 Sample Dates: 1/6/2014 - 1/13/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.48E-02 1.42E-03 3.53E-03 Sample ID: 281173 Sample Dates: 1/13/2014 - 1/20/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.60E-02 1.40E-03 3.27E-03 Sample ID: 281494 Sample Dates: 1/20/2014 - 1/27/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.79E-02 1.43E-03 3.23E-03 Sample ID: 282117 Sample Dates: 1/27/2014 - 2/3/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.14E-02 1.51E-03 3.25E-03 Sample ID: 282929 Sample Dates: 2/3/2014 - 2/10/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.73E-02 1.42E-03 3.22E-03 Sample ID: 283376 Sample Dates: 2/10/2014 - 2/17/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.40E-02 1.54E-03 3.08E-03 Sample ID: 284543 Sample Dates: 2/17/2014 - 2/24/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.00E-02 1.46E-03 3.16E-03 Sample ID: 285104 Sample Dates: 2/24/2014 - 3/3/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.41E-02 1.55E-03 3.18E-03 Sample ID: 285709 Sample Dates: 3/3/2014 - 3/10/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.87E-02 1.43E-03 3.08E-03 Sample ID: 286213 Sample Dates: 3/10/2014 - 3/17/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.07E-02 1.40E-03 2.68E-03 Sample ID: 287098 Sample Dates: 3/17/2014 - 3/24/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.41E-02 1.31E-03 3.09E-03 Sample ID: 288349 Sample Dates: 3/24/2014 - 3/31/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.11E-02 1.40E-03 2.71E-03 Sample ID: 289037 Sample Dates: 12/30/2013 - 3/31/2014 Nuclide Activity Sigma Error 1 LLD Cs-134 <2.73E-04 0.00E+00 2.73E-04 Cs-137 <3.35E-04 0.00E+00 3.35E-04 Be-7 1.28E-01 5.95E-03 5.07E-03 K-40 9.33E-03 1.76E-03 3.04E-03 Sample ID: 289073 Sample Dates: 3/31/2014 - 4/7/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.69E-02 1.43E-03 3.28E-03 Sample ID: 289459 Sample Dates: 4/7/2014 - 4/14/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.89E-02 1.34E-03 2.57E-03 Sample ID: 289869 Sample Dates: 4/14/2014 - 4/21/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.81E-02 1.44E-03 3.25E-03 Sample ID: 291474 Sample Dates: 4/21/2014 - 4/28/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.25E-02 1.48E-03 2.92E-03 Sample ID: 292768 Sample Dates: 4/28/2014 - 5/5/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.88E-02 1.42E-03 2.98E-03 Sample ID: 293030 Sample Dates: 5/5/2014 - 5/12/2014 Nuclide Activity Sigma Error 1 LLD Beta 3.02E-02 1.62E-03 2.81E-03 Sample ID: 294661 Sample Dates: 5/12/2014 - 5/19/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.89E-02 1.43E-03 3.06E-03 Sample ID: 295170 Sample Dates: 5/19/2014 - 5/27/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.25E-02 1.35E-03 2.53E-03 Sample ID: 295431 Sample Dates: 5/27/2014 - 6/2/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.15E-02 1.66E-03 3.54E-03 Sample ID: 295946 Sample Dates: 6/2/2014 - 6/9/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.60E-02 1.36E-03 3.10E-03 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 2 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 296191 Sample Dates: 6/9/2014 - 6/16/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.37E-02 1.29E-03 3.05E-03 Sample ID: 296712 Sample Dates: 6/16/2014 - 6/23/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.51E-02 1.53E-03 2.93E-03 Sample ID: 296939 Sample Dates: 6/23/2014 - 6/30/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.74E-02 1.40E-03 3.05E-03 Sample ID: 297301 Sample Dates: 3/31/2014 - 6/30/2014 Nuclide Activity Sigma Error 1 LLD Cs-134 <1.63E-03 0.00E+00 1.63E-03 Cs-137 <2.34E-03 0.00E+00 2.34E-03 Be-7 1.53E-01 4.62E-02 3.80E-02 K-40 <5.37E-02 0.00E+00 5.37E-02 Sample ID: 297336 Sample Dates: 6/30/2014 - 7/7/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.96E-02 2.78E-03 2.92E-03 Sample ID: 297624 Sample Dates: 7/7/2014 - 7/14/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.05E-02 2.94E-03 3.24E-03 Sample ID: 298160 Sample Dates: 7/14/2014 - 7/21/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.08E-02 2.82E-03 2.96E-03 Sample ID: 350188 Sample Dates: 7/21/2014 - 7/28/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.92E-02 2.77E-03 2.91E-03 Sample ID: 350929 Sample Dates: 7/28/2014 - 8/4/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.92E-02 2.79E-03 3.05E-03 Sample ID: 351175 Sample Dates: 8/4/2014 - 8/11/2014 Nuclide Activity Sigma Error 1 LLD Beta 3.55E-02 3.43E-03 2.89E-03 Sample ID: 351614 Sample Dates: 8/11/2014 - 8/18/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.23E-02 2.89E-03 2.97E-03 Sample ID: 353425 Sample Dates: 8/18/2014 - 8/25/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.66E-02 2.83E-03 3.38E-03 Sample ID: 354055 Sample Dates: 8/25/2014 - 9/2/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.46E-02 2.70E-03 2.42E-03 Sample ID: 354444 Sample Dates: 9/2/2014 - 9/8/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.65E-02 2.93E-03 3.43E-03 Sample ID: 354760 Sample Dates: 9/8/2014 - 9/15/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.25E-02 2.48E-03 3.11E-03 Sample ID: 355159 Sample Dates: 9/15/2014 - 9/22/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.92E-02 3.35E-03 3.39E-03 Sample ID: 355632 Sample Dates: 9/22/2014 - 9/29/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.35E-02 2.54E-03 3.08E-03 Sample ID: 355638 Sample Dates: 6/30/2014 - 9/29/2014 Nuclide Activity Sigma Error 1 LLD Cs-134 <1.02E-03 0.00E+00 1.02E-03 Cs-137 <8.90E-04 0.00E+00 8.90E-04 Be-7 9.57E-02 2.27E-02 2.21E-02 K-40 1.46E-02 7.44E-03 2.48E-03 Sample ID: 356495 Sample Dates: 9/29/2014 - 10/6/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.34E-02 3.03E-03 3.21E-03 Sample ID: 357047 Sample Dates: 10/6/2014 - 10/13/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.31E-02 2.82E-03 2.66E-03 Sample ID: 358046 Sample Dates: 10/13/2014 - 10/20/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.42E-02 2.54E-03 2.97E-03 Sample ID: 358654 Sample Dates: 10/20/2014 - 10/27/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.33E-02 2.82E-03 2.61E-03 Sample ID: 359288 Sample Dates: 10/27/2014 - 11/3/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.64E-02 3.21E-03 3.34E-03 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 3 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 360028 Sample Dates: 11/3/2014 - 11/10/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.42E-02 2.93E-03 2.85E-03 Sample ID: 360710 Sample Dates: 11/10/2014 - 11/17/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.97E-02 3.26E-03 3.06E-03 Sample ID: 361572 Sample Dates: 11/17/2014 - 11/24/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.78E-02 3.18E-03 3.07E-03 Sample ID: 361951 Sample Dates: 11/24/2014 - 12/1/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.89E-02 2.81E-03 3.13E-03 Sample ID: 362781 Sample Dates: 12/1/2014 - 12/8/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.10E-02 2.92E-03 3.21E-03 Sample ID: 363521 Sample Dates: 12/8/2014 - 12/15/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.41E-02 2.95E-03 2.79E-03 Sample ID: 363968 Sample Dates: 12/15/2014 - 12/22/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.77E-02 3.17E-03 3.09E-03 Sample ID: 364504 Sample Dates: 12/22/2014 - 12/29/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.44E-02 2.51E-03 2.90E-03 Sample ID: 364510 Sample Dates: 9/29/2014 - 12/29/2014 Nuclide Activity Sigma Error 1 LLD Cs-134 <7.23E-04 0.00E+00 7.23E-04 Cs-137 <7.00E-04 0.00E+00 7.00E-04 Be-7 1.16E-01 2.27E-02 1.68E-02 K-40 <1.73E-02 0.00E+00 1.73E-02 Sample Point 078.1 [ INDICATOR - WSW @ 0.53 miles ]

Sample ID: 280642 Sample Dates: 12/30/2013 - 1/6/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.73E-02 1.40E-03 3.18E-03 Sample ID: 280815 Sample Dates: 1/6/2014 - 1/13/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.48E-02 1.42E-03 3.52E-03 Sample ID: 281174 Sample Dates: 1/13/2014 - 1/20/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.47E-02 1.37E-03 3.27E-03 Sample ID: 281495 Sample Dates: 1/20/2014 - 1/27/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.96E-02 1.47E-03 3.23E-03 Sample ID: 282118 Sample Dates: 1/27/2014 - 2/3/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.94E-02 1.46E-03 3.25E-03 Sample ID: 282930 Sample Dates: 2/3/2014 - 2/10/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.69E-02 1.41E-03 3.23E-03 Sample ID: 283377 Sample Dates: 2/10/2014 - 2/17/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.00E-02 1.45E-03 3.08E-03 Sample ID: 284544 Sample Dates: 2/17/2014 - 2/24/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.05E-02 1.47E-03 3.15E-03 Sample ID: 285105 Sample Dates: 2/24/2014 - 3/3/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.42E-02 1.56E-03 3.19E-03 Sample ID: 285710 Sample Dates: 3/3/2014 - 3/10/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.87E-02 1.43E-03 3.08E-03 Sample ID: 286214 Sample Dates: 3/10/2014 - 3/17/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.74E-02 1.32E-03 2.68E-03 Sample ID: 287099 Sample Dates: 3/17/2014 - 3/24/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.22E-02 1.26E-03 3.09E-03 Sample ID: 288350 Sample Dates: 3/24/2014 - 3/31/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.17E-02 1.42E-03 2.72E-03 Sample ID: 289038 Sample Dates: 12/30/2013 - 3/31/2014 Nuclide Activity Sigma Error 1 LLD Cs-134 <3.61E-04 0.00E+00 3.61E-04 Cs-137 <3.32E-04 0.00E+00 3.32E-04 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 4 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 289038 Sample Dates: 12/30/2013 - 3/31/2014 Nuclide Activity Sigma Error 1 LLD Be-7 1.41E-01 6.14E-03 5.38E-03 K-40 9.65E-03 2.21E-03 3.46E-03 Sample ID: 289074 Sample Dates: 3/31/2014 - 4/7/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.66E-02 1.42E-03 3.27E-03 Sample ID: 289460 Sample Dates: 4/7/2014 - 4/14/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.76E-02 1.31E-03 2.58E-03 Sample ID: 289870 Sample Dates: 4/14/2014 - 4/21/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.72E-02 1.42E-03 3.25E-03 Sample ID: 291475 Sample Dates: 4/21/2014 - 4/28/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.49E-02 1.53E-03 2.94E-03 Sample ID: 292769 Sample Dates: 4/28/2014 - 5/5/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.02E-02 1.45E-03 2.98E-03 Sample ID: 293031 Sample Dates: 5/5/2014 - 5/12/2014 Nuclide Activity Sigma Error 1 LLD Beta 3.04E-02 1.63E-03 2.82E-03 Sample ID: 294662 Sample Dates: 5/12/2014 - 5/19/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.84E-02 1.42E-03 3.06E-03 Sample ID: 295171 Sample Dates: 5/19/2014 - 5/27/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.16E-02 1.33E-03 2.53E-03 Sample ID: 295432 Sample Dates: 5/27/2014 - 6/2/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.91E-02 1.59E-03 3.54E-03 Sample ID: 295947 Sample Dates: 6/2/2014 - 6/9/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.36E-02 1.30E-03 3.09E-03 Sample ID: 296192 Sample Dates: 6/9/2014 - 6/16/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.19E-02 1.25E-03 3.05E-03 Sample ID: 296713 Sample Dates: 6/16/2014 - 6/23/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.86E-02 1.39E-03 2.93E-03 Sample ID: 296940 Sample Dates: 6/23/2014 - 6/30/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.46E-02 1.32E-03 3.05E-03 Sample ID: 297302 Sample Dates: 3/31/2014 - 6/30/2014 Nuclide Activity Sigma Error 1 LLD Cs-134 <7.99E-04 0.00E+00 7.99E-04 Cs-137 <8.95E-04 0.00E+00 8.95E-04 Be-7 1.33E-01 2.84E-02 2.54E-02 K-40 7.54E-03 7.32E-03 1.08E-02 Sample ID: 297337 Sample Dates: 6/30/2014 - 7/7/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.87E-02 2.73E-03 2.92E-03 Sample ID: 297625 Sample Dates: 7/7/2014 - 7/14/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.72E-02 2.79E-03 3.24E-03 Sample ID: 298161 Sample Dates: 7/14/2014 - 7/21/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.39E-02 2.50E-03 2.96E-03 Sample ID: 350189 Sample Dates: 7/21/2014 - 7/28/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.62E-02 2.61E-03 2.91E-03 Sample ID: 350930 Sample Dates: 7/28/2014 - 8/4/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.61E-02 2.65E-03 3.06E-03 Sample ID: 351176 Sample Dates: 8/4/2014 - 8/11/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.81E-02 3.15E-03 2.89E-03 Sample ID: 351615 Sample Dates: 8/11/2014 - 8/18/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.02E-02 2.80E-03 2.97E-03 Sample ID: 353426 Sample Dates: 8/18/2014 - 8/25/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.87E-02 2.92E-03 3.37E-03 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 5 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 354057 Sample Dates: 8/25/2014 - 9/2/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.09E-02 2.54E-03 2.42E-03 Sample ID: 354445 Sample Dates: 9/2/2014 - 9/8/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.12E-02 2.66E-03 3.42E-03 Sample ID: 354761 Sample Dates: 9/8/2014 - 9/15/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.16E-02 2.44E-03 3.11E-03 Sample ID: 355162 Sample Dates: 9/15/2014 - 9/22/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.75E-02 3.28E-03 3.39E-03 Sample ID: 355633 Sample Dates: 9/22/2014 - 9/29/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.30E-02 2.51E-03 3.08E-03 Sample ID: 355639 Sample Dates: 6/30/2014 - 9/29/2014 Nuclide Activity Sigma Error 1 LLD Cs-134 <7.95E-04 0.00E+00 7.95E-04 Cs-137 <6.83E-04 0.00E+00 6.83E-04 Be-7 1.24E-01 2.45E-02 1.90E-02 K-40 <1.77E-02 0.00E+00 1.77E-02 Sample ID: 356497 Sample Dates: 9/29/2014 - 10/6/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.26E-02 3.00E-03 3.21E-03 Sample ID: 357048 Sample Dates: 10/6/2014 - 10/13/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.40E-02 2.87E-03 2.67E-03 Sample ID: 358047 Sample Dates: 10/13/2014 - 10/20/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.21E-02 2.42E-03 2.96E-03 Sample ID: 358655 Sample Dates: 10/20/2014 - 10/27/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.26E-02 2.79E-03 2.61E-03 Sample ID: 359290 Sample Dates: 10/27/2014 - 11/3/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.15E-02 3.01E-03 3.34E-03 Sample ID: 360029 Sample Dates: 11/3/2014 - 11/10/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.58E-02 3.01E-03 2.85E-03 Sample ID: 360711 Sample Dates: 11/10/2014 - 11/17/2014 Nuclide Activity Sigma Error 1 LLD Beta 3.17E-02 3.34E-03 3.06E-03 Sample ID: 361573 Sample Dates: 11/17/2014 - 11/24/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.50E-02 3.06E-03 3.07E-03 Sample ID: 361952 Sample Dates: 11/24/2014 - 12/1/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.84E-02 2.79E-03 3.13E-03 Sample ID: 362782 Sample Dates: 12/1/2014 - 12/8/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.05E-02 2.90E-03 3.21E-03 Sample ID: 363522 Sample Dates: 12/8/2014 - 12/15/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.33E-02 2.91E-03 2.79E-03 Sample ID: 363969 Sample Dates: 12/15/2014 - 12/22/2014 Nuclide Activity Sigma Error 1 LLD Beta 3.04E-02 3.28E-03 3.10E-03 Sample ID: 364505 Sample Dates: 12/22/2014 - 12/29/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.62E-02 2.60E-03 2.90E-03 Sample ID: 364511 Sample Dates: 9/29/2014 - 12/29/2014 Nuclide Activity Sigma Error 1 LLD Cs-134 <6.10E-04 0.00E+00 6.10E-04 Cs-137 <7.83E-04 0.00E+00 7.83E-04 Be-7 1.13E-01 2.26E-02 1.87E-02 K-40 <1.28E-02 0.00E+00 1.28E-02 Sample Point 079 [ INDICATOR - NE @ 0.56 miles ]

Sample ID: 280643 Sample Dates: 12/30/2013 - 1/6/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.61E-02 1.37E-03 3.17E-03 Sample ID: 280816 Sample Dates: 1/6/2014 - 1/13/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.49E-02 1.42E-03 3.53E-03 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 6 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 281175 Sample Dates: 1/13/2014 - 1/20/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.25E-02 1.31E-03 3.28E-03 Sample ID: 281496 Sample Dates: 1/20/2014 - 1/27/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.59E-02 1.39E-03 3.23E-03 Sample ID: 282119 Sample Dates: 1/27/2014 - 2/3/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.73E-02 1.42E-03 3.24E-03 Sample ID: 282931 Sample Dates: 2/3/2014 - 2/10/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.72E-02 1.42E-03 3.23E-03 Sample ID: 283378 Sample Dates: 2/10/2014 - 2/17/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.05E-02 1.46E-03 3.08E-03 Sample ID: 284545 Sample Dates: 2/17/2014 - 2/24/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.74E-02 1.39E-03 3.14E-03 Sample ID: 285106 Sample Dates: 2/24/2014 - 3/3/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.30E-02 1.53E-03 3.19E-03 Sample ID: 285711 Sample Dates: 3/3/2014 - 3/10/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.28E-02 1.29E-03 3.10E-03 Sample ID: 286215 Sample Dates: 3/10/2014 - 3/17/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.81E-02 1.34E-03 2.68E-03 Sample ID: 287100 Sample Dates: 3/17/2014 - 3/24/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.45E-02 1.32E-03 3.09E-03 Sample ID: 288351 Sample Dates: 3/24/2014 - 3/31/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.73E-02 1.32E-03 2.77E-03 Sample ID: 289039 Sample Dates: 12/30/2013 - 3/31/2014 Nuclide Activity Sigma Error 1 LLD Cs-134 <2.67E-04 0.00E+00 2.67E-04 Cs-137 <3.78E-04 0.00E+00 3.78E-04 Be-7 1.26E-01 5.94E-03 4.34E-03 K-40 9.01E-03 1.74E-03 3.52E-03 Sample ID: 289075 Sample Dates: 3/31/2014 - 4/7/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.81E-02 1.44E-03 3.21E-03 Sample ID: 289461 Sample Dates: 4/7/2014 - 4/14/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.82E-02 1.32E-03 2.58E-03 Sample ID: 289871 Sample Dates: 4/14/2014 - 4/21/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.75E-02 1.43E-03 3.25E-03 Sample ID: 291476 Sample Dates: 4/21/2014 - 4/28/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.81E-02 1.37E-03 2.92E-03 Sample ID: 292770 Sample Dates: 4/28/2014 - 5/5/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.68E-02 1.36E-03 2.98E-03 Sample ID: 293032 Sample Dates: 5/5/2014 - 5/12/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.13E-02 1.43E-03 2.80E-03 Sample ID: 294663 Sample Dates: 5/12/2014 - 5/19/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.85E-02 1.42E-03 3.08E-03 Sample ID: 295172 Sample Dates: 5/19/2014 - 5/27/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.46E-02 1.39E-03 2.53E-03 Sample ID: 295433 Sample Dates: 5/27/2014 - 6/2/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.01E-02 1.62E-03 3.56E-03 Sample ID: 295948 Sample Dates: 6/2/2014 - 6/9/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.25E-02 1.27E-03 3.10E-03 Sample ID: 296193 Sample Dates: 6/9/2014 - 6/16/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.39E-02 1.30E-03 3.05E-03 Sample ID: 296714 Sample Dates: 6/16/2014 - 6/23/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.05E-02 1.42E-03 2.92E-03 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 7 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 296941 Sample Dates: 6/23/2014 - 6/30/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.55E-02 1.35E-03 3.06E-03 Sample ID: 297303 Sample Dates: 3/31/2014 - 6/30/2014 Nuclide Activity Sigma Error 1 LLD Cs-134 <7.39E-04 0.00E+00 7.39E-04 Cs-137 <1.01E-03 0.00E+00 1.01E-03 Be-7 1.30E-01 3.43E-02 3.08E-02 K-40 1.65E-02 1.19E-02 1.35E-02 Sample ID: 297338 Sample Dates: 6/30/2014 - 7/7/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.24E-02 2.90E-03 2.93E-03 Sample ID: 297626 Sample Dates: 7/7/2014 - 7/14/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.92E-02 2.88E-03 3.25E-03 Sample ID: 298162 Sample Dates: 7/14/2014 - 7/21/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.53E-02 2.56E-03 2.96E-03 Sample ID: 350190 Sample Dates: 7/21/2014 - 7/28/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.59E-02 2.61E-03 2.91E-03 Sample ID: 350931 Sample Dates: 7/28/2014 - 8/4/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.41E-02 2.56E-03 3.06E-03 Sample ID: 351177 Sample Dates: 8/4/2014 - 8/11/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.65E-02 3.08E-03 2.90E-03 Sample ID: 351616 Sample Dates: 8/11/2014 - 8/18/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.99E-02 2.76E-03 2.94E-03 Sample ID: 353427 Sample Dates: 8/18/2014 - 8/25/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.68E-02 2.85E-03 3.41E-03 Sample ID: 354059 Sample Dates: 8/25/2014 - 9/2/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.74E-02 2.38E-03 2.42E-03 Sample ID: 354446 Sample Dates: 9/2/2014 - 9/8/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.23E-02 2.71E-03 3.42E-03 Sample ID: 354762 Sample Dates: 9/8/2014 - 9/15/2014 Nuclide Activity Sigma Error 1 LLD Beta 9.82E-03 2.34E-03 3.10E-03 Sample ID: 355165 Sample Dates: 9/15/2014 - 9/22/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.81E-02 3.33E-03 3.41E-03 Sample ID: 355634 Sample Dates: 9/22/2014 - 9/29/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.20E-02 2.46E-03 3.08E-03 Sample ID: 355640 Sample Dates: 6/30/2014 - 9/29/2014 Nuclide Activity Sigma Error 1 LLD Cs-134 <8.87E-04 0.00E+00 8.87E-04 Cs-137 <7.53E-04 0.00E+00 7.53E-04 Be-7 1.05E-01 2.20E-02 1.63E-02 K-40 <1.72E-02 0.00E+00 1.72E-02 Sample ID: 356499 Sample Dates: 9/29/2014 - 10/6/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.28E-02 3.01E-03 3.21E-03 Sample ID: 357049 Sample Dates: 10/6/2014 - 10/13/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.10E-02 2.72E-03 2.64E-03 Sample ID: 358048 Sample Dates: 10/13/2014 - 10/20/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.35E-02 2.53E-03 3.00E-03 Sample ID: 358656 Sample Dates: 10/20/2014 - 10/27/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.90E-02 2.64E-03 2.62E-03 Sample ID: 359292 Sample Dates: 10/27/2014 - 11/3/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.43E-02 3.14E-03 3.35E-03 Sample ID: 360030 Sample Dates: 11/3/2014 - 11/10/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.36E-02 2.91E-03 2.85E-03 Sample ID: 360712 Sample Dates: 11/10/2014 - 11/17/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.58E-02 3.10E-03 3.06E-03 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 8 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 361574 Sample Dates: 11/17/2014 - 11/24/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.74E-02 2.73E-03 3.08E-03 Sample ID: 361953 Sample Dates: 11/24/2014 - 12/1/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.86E-02 2.79E-03 3.13E-03 Sample ID: 362783 Sample Dates: 12/1/2014 - 12/8/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.89E-02 2.82E-03 3.20E-03 Sample ID: 363523 Sample Dates: 12/8/2014 - 12/15/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.58E-02 3.03E-03 2.80E-03 Sample ID: 363970 Sample Dates: 12/15/2014 - 12/22/2014 Nuclide Activity Sigma Error 1 LLD Beta 3.21E-02 3.34E-03 3.10E-03 Sample ID: 364506 Sample Dates: 12/22/2014 - 12/29/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.40E-02 2.49E-03 2.90E-03 Sample ID: 364512 Sample Dates: 9/29/2014 - 12/29/2014 Nuclide Activity Sigma Error 1 LLD Cs-134 <9.48E-04 0.00E+00 9.48E-04 Cs-137 <3.93E-04 0.00E+00 3.93E-04 Be-7 1.00E-01 2.09E-02 1.65E-02 K-40 1.47E-02 9.12E-03 1.11E-02 Sample Point 081 [ CONTROL - SE @ 9.33 miles ]

Sample ID: 280644 Sample Dates: 12/30/2013 - 1/6/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.74E-02 1.40E-03 3.19E-03 Sample ID: 280817 Sample Dates: 1/6/2014 - 1/13/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.04E-02 1.31E-03 3.51E-03 Sample ID: 281176 Sample Dates: 1/13/2014 - 1/20/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.12E-02 1.28E-03 3.26E-03 Sample ID: 281497 Sample Dates: 1/20/2014 - 1/27/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.77E-02 1.43E-03 3.23E-03 Sample ID: 282120 Sample Dates: 1/27/2014 - 2/3/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.64E-02 1.40E-03 3.26E-03 Sample ID: 282932 Sample Dates: 2/3/2014 - 2/10/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.50E-02 1.36E-03 3.22E-03 Sample ID: 283379 Sample Dates: 2/10/2014 - 2/17/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.77E-02 1.41E-03 3.11E-03 Sample ID: 284546 Sample Dates: 2/17/2014 - 2/24/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.96E-02 1.44E-03 3.14E-03 Sample ID: 285107 Sample Dates: 2/24/2014 - 3/3/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.30E-02 1.54E-03 3.20E-03 Sample ID: 285712 Sample Dates: 3/3/2014 - 3/10/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.69E-02 1.38E-03 3.07E-03 Sample ID: 286216 Sample Dates: 3/10/2014 - 3/17/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.94E-02 1.37E-03 2.69E-03 Sample ID: 287101 Sample Dates: 3/17/2014 - 3/24/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.26E-02 1.27E-03 3.09E-03 Sample ID: 288352 Sample Dates: 3/24/2014 - 3/31/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.02E-02 1.42E-03 2.84E-03 Sample ID: 289040 Sample Dates: 12/30/2013 - 3/31/2014 Nuclide Activity Sigma Error 1 LLD Cs-134 <3.17E-04 0.00E+00 3.17E-04 Cs-137 <3.14E-04 0.00E+00 3.14E-04 Be-7 1.43E-01 5.21E-03 3.74E-03 K-40 1.33E-02 1.97E-03 2.42E-03 Sample ID: 289076 Sample Dates: 3/31/2014 - 4/7/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.32E-02 1.31E-03 3.19E-03 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 9 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 289462 Sample Dates: 4/7/2014 - 4/14/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.54E-02 1.25E-03 2.59E-03 Sample ID: 289872 Sample Dates: 4/14/2014 - 4/21/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.08E-02 1.51E-03 3.24E-03 Sample ID: 291477 Sample Dates: 4/21/2014 - 4/28/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.80E-02 1.37E-03 2.91E-03 Sample ID: 292771 Sample Dates: 4/28/2014 - 5/5/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.07E-02 1.46E-03 2.97E-03 Sample ID: 293033 Sample Dates: 5/5/2014 - 5/12/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.93E-02 1.61E-03 2.83E-03 Sample ID: 294664 Sample Dates: 5/12/2014 - 5/19/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.00E-02 1.45E-03 3.06E-03 Sample ID: 295173 Sample Dates: 5/19/2014 - 5/27/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.40E-02 1.38E-03 2.54E-03 Sample ID: 295434 Sample Dates: 5/27/2014 - 6/2/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.83E-02 1.57E-03 3.52E-03 Sample ID: 295949 Sample Dates: 6/2/2014 - 6/9/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.37E-02 1.30E-03 3.09E-03 Sample ID: 296194 Sample Dates: 6/9/2014 - 6/16/2014 Nuclide Activity Sigma Error 1 LLD Beta 9.53E-03 1.18E-03 3.04E-03 Sample ID: 296715 Sample Dates: 6/16/2014 - 6/23/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.18E-02 1.46E-03 2.94E-03 Sample ID: 296942 Sample Dates: 6/23/2014 - 6/30/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.73E-02 1.39E-03 3.05E-03 Sample ID: 297304 Sample Dates: 3/31/2014 - 6/30/2014 Nuclide Activity Sigma Error 1 LLD Cs-134 <6.28E-04 0.00E+00 6.28E-04 Cs-137 <6.27E-04 0.00E+00 6.27E-04 Be-7 1.32E-01 2.70E-02 2.16E-02 K-40 7.94E-03 6.29E-03 7.74E-03 Sample ID: 297339 Sample Dates: 6/30/2014 - 7/7/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.20E-02 2.88E-03 2.92E-03 Sample ID: 297627 Sample Dates: 7/7/2014 - 7/14/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.02E-02 2.93E-03 3.24E-03 Sample ID: 298163 Sample Dates: 7/14/2014 - 7/21/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.23E-02 2.90E-03 2.98E-03 Sample ID: 350191 Sample Dates: 7/21/2014 - 7/28/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.80E-02 2.71E-03 2.91E-03 Sample ID: 350932 Sample Dates: 7/28/2014 - 8/4/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.69E-02 2.69E-03 3.06E-03 Sample ID: 351178 Sample Dates: 8/4/2014 - 8/11/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.64E-02 3.07E-03 2.89E-03 Sample ID: 351617 Sample Dates: 8/11/2014 - 8/18/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.68E-02 2.64E-03 2.98E-03 Sample ID: 353428 Sample Dates: 8/18/2014 - 8/25/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.77E-02 2.87E-03 3.38E-03 Sample ID: 354061 Sample Dates: 8/25/2014 - 9/2/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.21E-02 2.59E-03 2.42E-03 Sample ID: 354447 Sample Dates: 9/2/2014 - 9/8/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.17E-02 2.67E-03 3.42E-03 Sample ID: 354763 Sample Dates: 9/8/2014 - 9/15/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.19E-02 2.46E-03 3.12E-03 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 10 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 355168 Sample Dates: 9/15/2014 - 9/22/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.46E-02 3.17E-03 3.39E-03 Sample ID: 355635 Sample Dates: 9/22/2014 - 9/29/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.18E-02 2.45E-03 3.08E-03 Sample ID: 355641 Sample Dates: 6/30/2014 - 9/29/2014 Nuclide Activity Sigma Error 1 LLD Cs-134 <7.12E-04 0.00E+00 7.12E-04 Cs-137 <8.69E-04 0.00E+00 8.69E-04 Be-7 1.17E-01 2.25E-02 1.32E-02 K-40 9.91E-03 8.26E-03 1.17E-02 Sample ID: 356501 Sample Dates: 9/29/2014 - 10/6/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.29E-02 3.03E-03 3.24E-03 Sample ID: 357050 Sample Dates: 10/6/2014 - 10/13/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.43E-02 2.89E-03 2.68E-03 Sample ID: 358049 Sample Dates: 10/13/2014 - 10/20/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.59E-02 2.60E-03 2.93E-03 Sample ID: 358657 Sample Dates: 10/20/2014 - 10/27/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.24E-02 2.78E-03 2.61E-03 Sample ID: 359295 Sample Dates: 10/27/2014 - 11/3/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.21E-02 3.03E-03 3.34E-03 Sample ID: 360031 Sample Dates: 11/3/2014 - 11/10/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.22E-02 2.85E-03 2.86E-03 Sample ID: 360713 Sample Dates: 11/10/2014 - 11/17/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.60E-02 3.11E-03 3.06E-03 Sample ID: 361575 Sample Dates: 11/17/2014 - 11/24/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.72E-02 2.71E-03 3.05E-03 Sample ID: 361954 Sample Dates: 11/24/2014 - 12/1/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.50E-02 2.63E-03 3.14E-03 Sample ID: 362784 Sample Dates: 12/1/2014 - 12/8/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.21E-02 2.97E-03 3.21E-03 Sample ID: 363524 Sample Dates: 12/8/2014 - 12/15/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.83E-02 2.67E-03 2.78E-03 Sample ID: 363971 Sample Dates: 12/15/2014 - 12/22/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.33E-02 2.99E-03 3.10E-03 Sample ID: 364507 Sample Dates: 12/22/2014 - 12/29/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.39E-02 2.49E-03 2.91E-03 Sample ID: 364513 Sample Dates: 9/29/2014 - 12/29/2014 Nuclide Activity Sigma Error 1 LLD Cs-134 <4.84E-04 0.00E+00 4.84E-04 Cs-137 <8.69E-04 0.00E+00 8.69E-04 Be-7 9.66E-02 1.97E-02 1.36E-02 K-40 <1.77E-02 0.00E+00 1.77E-02 Sample Point 084 [ INDICATOR - NNE @ 2.58 miles ]

Sample ID: 280645 Sample Dates: 12/30/2013 - 1/6/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.88E-02 1.43E-03 3.18E-03 Sample ID: 280818 Sample Dates: 1/6/2014 - 1/13/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.43E-02 1.41E-03 3.53E-03 Sample ID: 281177 Sample Dates: 1/13/2014 - 1/20/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.35E-02 1.33E-03 3.26E-03 Sample ID: 281498 Sample Dates: 1/20/2014 - 1/27/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.98E-02 1.47E-03 3.23E-03 Sample ID: 282121 Sample Dates: 1/27/2014 - 2/3/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.99E-02 1.47E-03 3.25E-03 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 11 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 282933 Sample Dates: 2/3/2014 - 2/10/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.83E-02 1.45E-03 3.22E-03 Sample ID: 283380 Sample Dates: 2/10/2014 - 2/17/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.20E-02 1.49E-03 3.08E-03 Sample ID: 284547 Sample Dates: 2/17/2014 - 2/24/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.03E-02 1.47E-03 3.16E-03 Sample ID: 285108 Sample Dates: 2/24/2014 - 3/3/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.68E-02 1.61E-03 3.18E-03 Sample ID: 285713 Sample Dates: 3/3/2014 - 3/10/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.54E-02 1.35E-03 3.08E-03 Sample ID: 286217 Sample Dates: 3/10/2014 - 3/17/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.86E-02 1.35E-03 2.68E-03 Sample ID: 287102 Sample Dates: 3/17/2014 - 3/24/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.38E-02 1.30E-03 3.09E-03 Sample ID: 288353 Sample Dates: 3/24/2014 - 3/31/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.79E-02 1.34E-03 2.76E-03 Sample ID: 289041 Sample Dates: 12/30/2013 - 3/31/2014 Nuclide Activity Sigma Error 1 LLD Cs-134 <2.71E-04 0.00E+00 2.71E-04 Cs-137 <3.60E-04 0.00E+00 3.60E-04 Be-7 1.16E-01 5.70E-03 4.81E-03 K-40 1.09E-02 2.14E-03 3.04E-03 Sample ID: 289077 Sample Dates: 3/31/2014 - 4/7/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.73E-02 1.43E-03 3.23E-03 Sample ID: 289463 Sample Dates: 4/7/2014 - 4/14/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.82E-02 1.33E-03 2.59E-03 Sample ID: 289873 Sample Dates: 4/14/2014 - 4/21/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.05E-02 1.50E-03 3.24E-03 Sample ID: 291478 Sample Dates: 4/21/2014 - 4/28/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.47E-02 1.52E-03 2.91E-03 Sample ID: 292772 Sample Dates: 4/28/2014 - 5/5/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.92E-02 1.43E-03 2.98E-03 Sample ID: 293034 Sample Dates: 5/5/2014 - 5/12/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.68E-02 1.55E-03 2.82E-03 Sample ID: 294665 Sample Dates: 5/12/2014 - 5/19/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.37E-02 1.53E-03 3.06E-03 Sample ID: 295174 Sample Dates: 5/19/2014 - 5/27/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.71E-02 1.44E-03 2.54E-03 Sample ID: 295435 Sample Dates: 5/27/2014 - 6/2/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.65E-02 1.77E-03 3.53E-03 Sample ID: 295950 Sample Dates: 6/2/2014 - 6/9/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.55E-02 1.34E-03 3.09E-03 Sample ID: 296195 Sample Dates: 6/9/2014 - 6/16/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.38E-02 1.30E-03 3.05E-03 Sample ID: 296716 Sample Dates: 6/16/2014 - 6/23/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.48E-02 1.52E-03 2.93E-03 Sample ID: 296943 Sample Dates: 6/23/2014 - 6/30/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.09E-02 1.48E-03 3.06E-03 Sample ID: 297305 Sample Dates: 3/31/2014 - 6/30/2014 Nuclide Activity Sigma Error 1 LLD Cs-134 <6.09E-04 0.00E+00 6.09E-04 Cs-137 <8.76E-04 0.00E+00 8.76E-04 Be-7 1.38E-01 2.86E-02 1.77E-02 K-40 8.64E-03 6.57E-03 3.34E-03 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 12 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 297340 Sample Dates: 6/30/2014 - 7/7/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.50E-02 3.01E-03 2.92E-03 Sample ID: 297628 Sample Dates: 7/7/2014 - 7/14/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.23E-02 3.02E-03 3.25E-03 Sample ID: 298164 Sample Dates: 7/14/2014 - 7/21/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.98E-02 2.77E-03 2.97E-03 Sample ID: 350192 Sample Dates: 7/21/2014 - 7/28/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.93E-02 2.77E-03 2.92E-03 Sample ID: 350933 Sample Dates: 7/28/2014 - 8/4/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.92E-02 2.79E-03 3.06E-03 Sample ID: 351179 Sample Dates: 8/4/2014 - 8/11/2014 Nuclide Activity Sigma Error 1 LLD Beta 3.27E-02 3.33E-03 2.90E-03 Sample ID: 351618 Sample Dates: 8/11/2014 - 8/18/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.46E-02 2.99E-03 2.98E-03 Sample ID: 353429 Sample Dates: 8/18/2014 - 8/25/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.76E-02 2.88E-03 3.39E-03 Sample ID: 354063 Sample Dates: 8/25/2014 - 9/2/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.28E-02 2.62E-03 2.42E-03 Sample ID: 354448 Sample Dates: 9/2/2014 - 9/8/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.57E-02 2.89E-03 3.42E-03 Sample ID: 354764 Sample Dates: 9/8/2014 - 9/15/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.41E-02 2.56E-03 3.11E-03 Sample ID: 355171 Sample Dates: 9/15/2014 - 9/22/2014 Nuclide Activity Sigma Error 1 LLD Beta 3.10E-02 3.41E-03 3.39E-03 Sample ID: 355636 Sample Dates: 9/22/2014 - 9/29/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.32E-02 2.52E-03 3.08E-03 Sample ID: 355642 Sample Dates: 6/30/2014 - 9/29/2014 Nuclide Activity Sigma Error 1 LLD Cs-134 <8.87E-04 0.00E+00 8.87E-04 Cs-137 <8.90E-04 0.00E+00 8.90E-04 Be-7 1.08E-01 2.28E-02 1.80E-02 K-40 <2.11E-02 0.00E+00 2.11E-02 Sample ID: 356503 Sample Dates: 9/29/2014 - 10/6/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.42E-02 3.09E-03 3.24E-03 Sample ID: 357051 Sample Dates: 10/6/2014 - 10/13/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.30E-02 2.80E-03 2.63E-03 Sample ID: 358050 Sample Dates: 10/13/2014 - 10/20/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.59E-02 2.64E-03 2.98E-03 Sample ID: 358658 Sample Dates: 10/20/2014 - 10/27/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.20E-02 2.76E-03 2.60E-03 Sample ID: 359297 Sample Dates: 10/27/2014 - 11/3/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.47E-02 3.14E-03 3.34E-03 Sample ID: 360032 Sample Dates: 11/3/2014 - 11/10/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.85E-02 3.12E-03 2.86E-03 Sample ID: 360714 Sample Dates: 11/10/2014 - 11/17/2014 Nuclide Activity Sigma Error 1 LLD Beta 3.28E-02 3.37E-03 3.05E-03 Sample ID: 361576 Sample Dates: 11/17/2014 - 11/24/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.63E-02 3.11E-03 3.06E-03 Sample ID: 361955 Sample Dates: 11/24/2014 - 12/1/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.04E-02 2.88E-03 3.14E-03 Sample ID: 362785 Sample Dates: 12/1/2014 - 12/8/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.53E-02 3.10E-03 3.21E-03 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 13 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 363525 Sample Dates: 12/8/2014 - 12/15/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.15E-02 2.83E-03 2.79E-03 Sample ID: 363972 Sample Dates: 12/15/2014 - 12/22/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.31E-02 2.98E-03 3.09E-03 Sample ID: 364508 Sample Dates: 12/22/2014 - 12/29/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.42E-02 2.51E-03 2.92E-03 Sample ID: 364514 Sample Dates: 9/29/2014 - 12/29/2014 Nuclide Activity Sigma Error 1 LLD Cs-134 <9.27E-04 0.00E+00 9.27E-04 Cs-137 <6.84E-04 0.00E+00 6.84E-04 Be-7 1.23E-01 2.23E-02 1.32E-02 K-40 <1.36E-02 0.00E+00 1.36E-02 Sample Point 085 [ INDICATOR - NNW @ 0.88 miles ]

Sample ID: 280647 Sample Dates: 12/30/2013 - 1/6/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.05E-02 1.48E-03 3.19E-03 Sample ID: 280820 Sample Dates: 1/6/2014 - 1/13/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.55E-02 1.53E-03 3.85E-03 Sample ID: 281179 Sample Dates: 1/13/2014 - 1/20/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.47E-02 1.36E-03 3.27E-03 Sample ID: 281500 Sample Dates: 1/20/2014 - 1/27/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.64E-02 1.40E-03 3.23E-03 Sample ID: 282123 Sample Dates: 1/27/2014 - 2/3/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.02E-02 1.48E-03 3.25E-03 Sample ID: 282935 Sample Dates: 2/3/2014 - 2/10/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.52E-02 1.37E-03 3.22E-03 Sample ID: 283382 Sample Dates: 2/10/2014 - 2/17/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.32E-02 1.52E-03 3.08E-03 Sample ID: 284549 Sample Dates: 2/17/2014 - 2/24/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.26E-02 1.51E-03 3.13E-03 Sample ID: 285110 Sample Dates: 2/24/2014 - 3/3/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.39E-02 1.56E-03 3.20E-03 Sample ID: 285715 Sample Dates: 3/3/2014 - 3/10/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.79E-02 1.41E-03 3.08E-03 Sample ID: 286219 Sample Dates: 3/10/2014 - 3/17/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.95E-02 1.37E-03 2.68E-03 Sample ID: 287104 Sample Dates: 3/17/2014 - 3/24/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.52E-02 1.34E-03 3.09E-03 Sample ID: 288355 Sample Dates: 3/24/2014 - 3/31/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.98E-02 1.37E-03 2.73E-03 Sample ID: 289042 Sample Dates: 12/30/2013 - 3/31/2014 Nuclide Activity Sigma Error 1 LLD Cs-134 <4.79E-04 0.00E+00 4.79E-04 Cs-137 <4.44E-04 0.00E+00 4.44E-04 Be-7 1.31E-01 6.21E-03 5.93E-03 K-40 1.58E-02 2.44E-03 5.29E-03 Sample ID: 289079 Sample Dates: 3/31/2014 - 4/7/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.71E-02 1.44E-03 3.28E-03 Sample ID: 289465 Sample Dates: 4/7/2014 - 4/14/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.74E-02 1.30E-03 2.58E-03 Sample ID: 289875 Sample Dates: 4/14/2014 - 4/21/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.15E-02 1.52E-03 3.25E-03 Sample ID: 291480 Sample Dates: 4/21/2014 - 4/28/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.45E-02 1.53E-03 2.93E-03 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 14 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 292774 Sample Dates: 4/28/2014 - 5/5/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.07E-02 1.46E-03 2.98E-03 Sample ID: 293036 Sample Dates: 5/5/2014 - 5/12/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.79E-02 1.58E-03 2.83E-03 Sample ID: 294667 Sample Dates: 5/12/2014 - 5/19/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.27E-02 1.52E-03 3.07E-03 Sample ID: 295176 Sample Dates: 5/19/2014 - 5/27/2014 Nuclide Activity Sigma Error 1 LLD Beta 3.00E-02 1.50E-03 2.54E-03 Sample ID: 295437 Sample Dates: 5/27/2014 - 6/2/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.47E-02 1.73E-03 3.55E-03 Sample ID: 295952 Sample Dates: 6/2/2014 - 6/9/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.32E-02 1.29E-03 3.10E-03 Sample ID: 296197 Sample Dates: 6/9/2014 - 6/16/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.64E-02 1.36E-03 3.05E-03 Sample ID: 296718 Sample Dates: 6/16/2014 - 6/23/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.75E-02 1.58E-03 2.94E-03 Sample ID: 296945 Sample Dates: 6/23/2014 - 6/30/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.33E-02 1.54E-03 3.07E-03 Sample ID: 297306 Sample Dates: 3/31/2014 - 6/30/2014 Nuclide Activity Sigma Error 1 LLD Cs-134 <4.19E-04 0.00E+00 4.19E-04 Cs-137 <5.36E-04 0.00E+00 5.36E-04 Be-7 1.61E-01 2.98E-02 2.61E-02 K-40 <1.25E-02 0.00E+00 1.25E-02 Sample ID: 297342 Sample Dates: 6/30/2014 - 7/7/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.47E-02 3.01E-03 2.93E-03 Sample ID: 297630 Sample Dates: 7/7/2014 - 7/14/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.49E-02 3.13E-03 3.25E-03 Sample ID: 298166 Sample Dates: 7/14/2014 - 7/21/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.19E-02 2.89E-03 2.99E-03 Sample ID: 350193 Sample Dates: 7/21/2014 - 7/28/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.86E-02 2.74E-03 2.91E-03 Sample ID: 350934 Sample Dates: 7/28/2014 - 8/4/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.99E-02 2.84E-03 3.08E-03 Sample ID: 351180 Sample Dates: 8/4/2014 - 8/11/2014 Nuclide Activity Sigma Error 1 LLD Beta 3.29E-02 3.35E-03 2.90E-03 Sample ID: 351619 Sample Dates: 8/11/2014 - 8/18/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.55E-02 3.03E-03 2.98E-03 Sample ID: 353430 Sample Dates: 8/18/2014 - 8/25/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.05E-02 3.00E-03 3.38E-03 Sample ID: 354065 Sample Dates: 8/25/2014 - 9/2/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.26E-02 2.63E-03 2.44E-03 Sample ID: 354449 Sample Dates: 9/2/2014 - 9/8/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.46E-02 2.84E-03 3.43E-03 Sample ID: 354765 Sample Dates: 9/8/2014 - 9/15/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.21E-02 2.47E-03 3.12E-03 Sample ID: 355173 Sample Dates: 9/15/2014 - 9/22/2014 Nuclide Activity Sigma Error 1 LLD Beta 3.01E-02 3.38E-03 3.39E-03 Sample ID: 355637 Sample Dates: 9/22/2014 - 9/29/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.18E-02 2.46E-03 3.09E-03 Sample ID: 355643 Sample Dates: 6/30/2014 - 9/29/2014 Nuclide Activity Sigma Error 1 LLD Cs-134 <9.94E-04 0.00E+00 9.94E-04 Cs-137 <6.26E-04 0.00E+00 6.26E-04 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 15 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 355643 Sample Dates: 6/30/2014 - 9/29/2014 Nuclide Activity Sigma Error 1 LLD Be-7 1.29E-01 2.50E-02 1.91E-02 K-40 9.35E-03 7.45E-03 9.98E-03 Sample ID: 356506 Sample Dates: 9/29/2014 - 10/6/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.26E-02 3.01E-03 3.22E-03 Sample ID: 357052 Sample Dates: 10/6/2014 - 10/13/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.03E-02 2.70E-03 2.68E-03 Sample ID: 358051 Sample Dates: 10/13/2014 - 10/20/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.43E-02 2.53E-03 2.95E-03 Sample ID: 358659 Sample Dates: 10/20/2014 - 10/27/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.87E-02 2.62E-03 2.61E-03 Sample ID: 359299 Sample Dates: 10/27/2014 - 11/3/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.00E-02 2.95E-03 3.34E-03 Sample ID: 360033 Sample Dates: 11/3/2014 - 11/10/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.30E-02 2.88E-03 2.86E-03 Sample ID: 360715 Sample Dates: 11/10/2014 - 11/17/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.33E-02 2.99E-03 3.05E-03 Sample ID: 361577 Sample Dates: 11/17/2014 - 11/24/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.19E-02 2.93E-03 3.07E-03 Sample ID: 361956 Sample Dates: 11/24/2014 - 12/1/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.04E-02 2.87E-03 3.13E-03 Sample ID: 362786 Sample Dates: 12/1/2014 - 12/8/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.97E-02 2.87E-03 3.21E-03 Sample ID: 363526 Sample Dates: 12/8/2014 - 12/15/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.52E-02 2.99E-03 2.79E-03 Sample ID: 363973 Sample Dates: 12/15/2014 - 12/22/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.87E-02 3.21E-03 3.10E-03 Sample ID: 364509 Sample Dates: 12/22/2014 - 12/29/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.44E-02 2.51E-03 2.90E-03 Sample ID: 364515 Sample Dates: 9/29/2014 - 12/29/2014 Nuclide Activity Sigma Error 1 LLD Cs-134 <7.07E-04 0.00E+00 7.07E-04 Cs-137 <6.26E-04 0.00E+00 6.26E-04 Be-7 1.04E-01 2.05E-02 1.38E-02 K-40 <2.04E-02 0.00E+00 2.04E-02 Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 Sample Point 077 [ INDICATOR - SW @ 1 miles ]

Sample ID: 280636 Sample Dates: 12/30/2013 - 1/6/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.77E-02 0.00E+00 2.77E-02 Cs-134 <1.86E-02 0.00E+00 1.86E-02 Cs-137 <1.87E-02 0.00E+00 1.87E-02 Be-7 <1.72E-01 0.00E+00 1.72E-01 K-40 4.24E-01 1.09E-01 7.64E-02 Sample ID: 280809 Sample Dates: 1/6/2014 - 1/13/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.74E-02 0.00E+00 2.74E-02 Cs-134 <1.88E-02 0.00E+00 1.88E-02 Cs-137 <1.72E-02 0.00E+00 1.72E-02 Be-7 <1.63E-01 0.00E+00 1.63E-01 K-40 <5.99E-01 0.00E+00 5.99E-01 Sample ID: 281168 Sample Dates: 1/13/2014 - 1/20/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.37E-02 0.00E+00 1.37E-02 Cs-134 <1.37E-02 0.00E+00 1.37E-02 Cs-137 <9.40E-03 0.00E+00 9.40E-03 Be-7 <7.18E-02 0.00E+00 7.18E-02 K-40 4.99E-01 1.04E-01 1.56E-01 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 16 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 281489 Sample Dates: 1/20/2014 - 1/27/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.30E-02 0.00E+00 1.30E-02 Cs-134 <9.69E-03 0.00E+00 9.69E-03 Cs-137 <8.40E-03 0.00E+00 8.40E-03 Be-7 <7.24E-02 0.00E+00 7.24E-02 K-40 5.25E-01 7.91E-02 1.54E-01 Sample ID: 282112 Sample Dates: 1/27/2014 - 2/3/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.22E-02 0.00E+00 2.22E-02 Cs-134 <1.56E-02 0.00E+00 1.56E-02 Cs-137 <1.43E-02 0.00E+00 1.43E-02 Be-7 <1.69E-01 0.00E+00 1.69E-01 K-40 5.26E-01 1.43E-01 2.57E-01 Sample ID: 282924 Sample Dates: 2/3/2014 - 2/10/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.80E-02 0.00E+00 2.80E-02 Cs-134 <1.62E-02 0.00E+00 1.62E-02 Cs-137 <1.72E-02 0.00E+00 1.72E-02 Be-7 <1.45E-01 0.00E+00 1.45E-01 K-40 4.65E-01 1.16E-01 2.18E-01 Sample ID: 283371 Sample Dates: 2/10/2014 - 2/17/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.68E-02 0.00E+00 1.68E-02 Cs-134 <1.39E-02 0.00E+00 1.39E-02 Cs-137 <1.45E-02 0.00E+00 1.45E-02 Be-7 <1.17E-01 0.00E+00 1.17E-01 K-40 2.80E-01 8.09E-02 1.77E-01 Sample ID: 284538 Sample Dates: 2/17/2014 - 2/24/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.92E-02 0.00E+00 1.92E-02 Cs-134 <1.88E-02 0.00E+00 1.88E-02 Cs-137 <1.70E-02 0.00E+00 1.70E-02 Be-7 <1.33E-01 0.00E+00 1.33E-01 K-40 <4.54E-01 0.00E+00 4.54E-01 Sample ID: 285099 Sample Dates: 2/24/2014 - 3/3/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.24E-02 0.00E+00 2.24E-02 Cs-134 <1.86E-02 0.00E+00 1.86E-02 Cs-137 <1.66E-02 0.00E+00 1.66E-02 Be-7 <1.10E-01 0.00E+00 1.10E-01 K-40 <3.67E-01 0.00E+00 3.67E-01 Sample ID: 285704 Sample Dates: 3/3/2014 - 3/10/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.08E-02 0.00E+00 1.08E-02 Cs-134 <9.27E-03 0.00E+00 9.27E-03 Cs-137 <9.50E-03 0.00E+00 9.50E-03 Be-7 <6.89E-02 0.00E+00 6.89E-02 K-40 4.88E-01 8.25E-02 1.01E-01 Sample ID: 286208 Sample Dates: 3/10/2014 - 3/17/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.57E-02 0.00E+00 2.57E-02 Cs-134 <2.15E-02 0.00E+00 2.15E-02 Cs-137 <2.11E-02 0.00E+00 2.11E-02 Be-7 <1.51E-01 0.00E+00 1.51E-01 K-40 3.74E-01 1.04E-01 2.06E-01 Sample ID: 287093 Sample Dates: 3/17/2014 - 3/24/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.44E-02 0.00E+00 1.44E-02 Cs-134 <1.06E-02 0.00E+00 1.06E-02 Cs-137 <1.46E-02 0.00E+00 1.46E-02 Be-7 <7.50E-02 0.00E+00 7.50E-02 K-40 3.59E-01 1.04E-01 5.83E-02 Sample ID: 288344 Sample Dates: 3/24/2014 - 3/31/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.71E-02 0.00E+00 1.71E-02 Cs-134 <6.88E-03 0.00E+00 6.88E-03 Cs-137 <1.50E-02 0.00E+00 1.50E-02 Be-7 <9.05E-02 0.00E+00 9.05E-02 K-40 3.33E-01 1.13E-01 2.45E-01 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 17 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 289068 Sample Dates: 3/31/2014 - 4/7/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.76E-02 0.00E+00 2.76E-02 Cs-134 <1.48E-02 0.00E+00 1.48E-02 Cs-137 <2.90E-02 0.00E+00 2.90E-02 Be-7 <1.83E-01 0.00E+00 1.83E-01 K-40 6.22E-01 1.36E-01 8.01E-02 Sample ID: 289454 Sample Dates: 4/7/2014 - 4/14/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.30E-02 0.00E+00 2.30E-02 Cs-134 <1.42E-02 0.00E+00 1.42E-02 Cs-137 <1.67E-02 0.00E+00 1.67E-02 Be-7 <1.55E-01 0.00E+00 1.55E-01 K-40 <6.47E-01 0.00E+00 6.47E-01 Sample ID: 289864 Sample Dates: 4/14/2014 - 4/21/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.28E-02 0.00E+00 2.28E-02 Cs-134 <1.85E-02 0.00E+00 1.85E-02 Cs-137 <1.59E-02 0.00E+00 1.59E-02 Be-7 <1.89E-01 0.00E+00 1.89E-01 K-40 <5.01E-01 0.00E+00 5.01E-01 Sample ID: 291469 Sample Dates: 4/21/2014 - 4/28/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.44E-02 0.00E+00 2.44E-02 Cs-134 <1.58E-02 0.00E+00 1.58E-02 Cs-137 <2.15E-02 0.00E+00 2.15E-02 Be-7 <1.63E-01 0.00E+00 1.63E-01 K-40 4.79E-01 1.16E-01 7.62E-02 Sample ID: 292763 Sample Dates: 4/28/2014 - 5/5/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.22E-02 0.00E+00 1.22E-02 Cs-134 <1.12E-02 0.00E+00 1.12E-02 Cs-137 <1.14E-02 0.00E+00 1.14E-02 Be-7 <1.07E-01 0.00E+00 1.07E-01 K-40 2.90E-01 1.03E-01 1.72E-01 Sample ID: 293025 Sample Dates: 5/5/2014 - 5/12/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.47E-02 0.00E+00 1.47E-02 Cs-134 <7.49E-03 0.00E+00 7.49E-03 Cs-137 <1.74E-02 0.00E+00 1.74E-02 Be-7 <7.87E-02 0.00E+00 7.87E-02 K-40 <3.82E-01 0.00E+00 3.82E-01 Sample ID: 294656 Sample Dates: 5/12/2014 - 5/19/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.28E-02 0.00E+00 1.28E-02 Cs-134 <1.27E-02 0.00E+00 1.27E-02 Cs-137 <1.50E-02 0.00E+00 1.50E-02 Be-7 <9.46E-02 0.00E+00 9.46E-02 K-40 5.69E-01 1.12E-01 5.91E-02 Sample ID: 295165 Sample Dates: 5/19/2014 - 5/27/2014 Nuclide Activity Sigma Error 1 LLD I-131 <3.33E-02 0.00E+00 3.33E-02 Cs-134 <1.86E-02 0.00E+00 1.86E-02 Cs-137 <1.87E-02 0.00E+00 1.87E-02 Be-7 <1.15E-01 0.00E+00 1.15E-01 K-40 3.68E-01 9.51E-02 1.77E-01 Sample ID: 295426 Sample Dates: 5/27/2014 - 6/2/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.63E-02 0.00E+00 2.63E-02 Cs-134 <1.92E-02 0.00E+00 1.92E-02 Cs-137 <2.44E-02 0.00E+00 2.44E-02 Be-7 <1.44E-01 0.00E+00 1.44E-01 K-40 5.82E-01 1.41E-01 9.26E-02 Sample ID: 295941 Sample Dates: 6/2/2014 - 6/9/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.05E-02 0.00E+00 2.05E-02 Cs-134 <2.60E-02 0.00E+00 2.60E-02 Cs-137 <2.33E-02 0.00E+00 2.33E-02 Be-7 <1.53E-01 0.00E+00 1.53E-01 K-40 3.97E-01 1.06E-01 7.66E-02 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 18 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 296186 Sample Dates: 6/9/2014 - 6/16/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.36E-02 0.00E+00 1.36E-02 Cs-134 <9.19E-03 0.00E+00 9.19E-03 Cs-137 <1.21E-02 0.00E+00 1.21E-02 Be-7 <7.31E-02 0.00E+00 7.31E-02 K-40 6.03E-01 8.52E-02 1.13E-01 Sample ID: 296707 Sample Dates: 6/16/2014 - 6/23/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.27E-02 0.00E+00 2.27E-02 Cs-134 <1.51E-02 0.00E+00 1.51E-02 Cs-137 <2.45E-02 0.00E+00 2.45E-02 Be-7 <1.24E-01 0.00E+00 1.24E-01 K-40 5.87E-01 1.28E-01 2.02E-01 Sample ID: 296934 Sample Dates: 6/23/2014 - 6/30/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.13E-02 0.00E+00 1.13E-02 Cs-134 <6.95E-03 0.00E+00 6.95E-03 Cs-137 <1.04E-02 0.00E+00 1.04E-02 Be-7 <7.60E-02 0.00E+00 7.60E-02 K-40 6.69E-01 1.06E-01 1.42E-01 Sample ID: 297331 Sample Dates: 6/30/2014 - 7/7/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.99E-02 0.00E+00 1.99E-02 Cs-134 <1.26E-02 0.00E+00 1.26E-02 Cs-137 <3.61E-03 0.00E+00 3.61E-03 Be-7 <9.12E-02 0.00E+00 9.12E-02 K-40 4.44E-01 1.02E-01 1.76E-01 Sample ID: 297619 Sample Dates: 7/7/2014 - 7/14/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.72E-02 0.00E+00 2.72E-02 Cs-134 <1.17E-02 0.00E+00 1.17E-02 Cs-137 <1.57E-02 0.00E+00 1.57E-02 Be-7 <1.13E-01 0.00E+00 1.13E-01 K-40 4.62E-01 1.94E-01 1.98E-01 Sample ID: 298155 Sample Dates: 7/14/2014 - 7/21/2014 Nuclide Activity Sigma Error 1 LLD I-131 <3.71E-02 0.00E+00 3.71E-02 Cs-134 <1.49E-02 0.00E+00 1.49E-02 Cs-137 <1.27E-02 0.00E+00 1.27E-02 Be-7 <1.32E-01 0.00E+00 1.32E-01 K-40 3.34E-01 2.46E-01 3.17E-01 Sample ID: 350194 Sample Dates: 7/21/2014 - 7/28/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.71E-02 0.00E+00 2.71E-02 Cs-134 <1.74E-02 0.00E+00 1.74E-02 Cs-137 <1.94E-02 0.00E+00 1.94E-02 Be-7 <1.24E-01 0.00E+00 1.24E-01 K-40 5.85E-01 3.02E-01 3.02E-01 Sample ID: 350935 Sample Dates: 7/28/2014 - 8/4/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.02E-02 0.00E+00 2.02E-02 Cs-134 <1.03E-02 0.00E+00 1.03E-02 Cs-137 <1.29E-02 0.00E+00 1.29E-02 Be-7 <1.32E-01 0.00E+00 1.32E-01 K-40 <5.35E-01 0.00E+00 5.35E-01 Sample ID: 351181 Sample Dates: 8/4/2014 - 8/11/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.54E-02 0.00E+00 2.54E-02 Cs-134 <1.88E-02 0.00E+00 1.88E-02 Cs-137 <1.31E-02 0.00E+00 1.31E-02 Be-7 <1.36E-01 0.00E+00 1.36E-01 K-40 <5.68E-01 0.00E+00 5.68E-01 Sample ID: 351620 Sample Dates: 8/11/2014 - 8/18/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.49E-02 0.00E+00 2.49E-02 Cs-134 <2.70E-02 0.00E+00 2.70E-02 Cs-137 <1.85E-02 0.00E+00 1.85E-02 Be-7 <1.52E-01 0.00E+00 1.52E-01 K-40 <6.02E-01 0.00E+00 6.02E-01 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 19 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 353431 Sample Dates: 8/18/2014 - 8/25/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.52E-02 0.00E+00 2.52E-02 Cs-134 <1.59E-02 0.00E+00 1.59E-02 Cs-137 <2.86E-02 0.00E+00 2.86E-02 Be-7 <1.72E-01 0.00E+00 1.72E-01 K-40 7.30E-01 3.05E-01 8.25E-02 Sample ID: 354068 Sample Dates: 8/25/2014 - 9/2/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.02E-02 0.00E+00 2.02E-02 Cs-134 <2.20E-02 0.00E+00 2.20E-02 Cs-137 <1.65E-02 0.00E+00 1.65E-02 Be-7 <7.15E-02 0.00E+00 7.15E-02 K-40 4.74E-01 2.50E-01 2.50E-01 Sample ID: 354450 Sample Dates: 9/2/2014 - 9/8/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.93E-02 0.00E+00 2.93E-02 Cs-134 <2.67E-02 0.00E+00 2.67E-02 Cs-137 <2.23E-02 0.00E+00 2.23E-02 Be-7 <1.40E-01 0.00E+00 1.40E-01 K-40 <7.66E-01 0.00E+00 7.66E-01 Sample ID: 354766 Sample Dates: 9/8/2014 - 9/15/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.50E-02 0.00E+00 1.50E-02 Cs-134 <1.77E-02 0.00E+00 1.77E-02 Cs-137 <1.26E-02 0.00E+00 1.26E-02 Be-7 <6.16E-02 0.00E+00 6.16E-02 K-40 2.86E-01 2.13E-01 2.81E-01 Sample ID: 355175 Sample Dates: 9/15/2014 - 9/22/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.86E-02 0.00E+00 1.86E-02 Cs-134 <1.33E-02 0.00E+00 1.33E-02 Cs-137 <2.35E-02 0.00E+00 2.35E-02 Be-7 <8.25E-02 0.00E+00 8.25E-02 K-40 5.32E-01 2.81E-01 2.69E-01 Sample ID: 355644 Sample Dates: 9/22/2014 - 9/29/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.98E-02 0.00E+00 1.98E-02 Cs-134 <1.69E-02 0.00E+00 1.69E-02 Cs-137 <2.30E-02 0.00E+00 2.30E-02 Be-7 <1.02E-01 0.00E+00 1.02E-01 K-40 3.25E-01 2.57E-01 3.50E-01 Sample ID: 356508 Sample Dates: 9/29/2014 - 10/6/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.22E-02 0.00E+00 2.22E-02 Cs-134 <1.84E-02 0.00E+00 1.84E-02 Cs-137 <1.89E-02 0.00E+00 1.89E-02 Be-7 <1.86E-01 0.00E+00 1.86E-01 K-40 <5.57E-01 0.00E+00 5.57E-01 Sample ID: 357053 Sample Dates: 10/6/2014 - 10/13/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.32E-02 0.00E+00 2.32E-02 Cs-134 <1.83E-02 0.00E+00 1.83E-02 Cs-137 <1.87E-02 0.00E+00 1.87E-02 Be-7 <8.12E-02 0.00E+00 8.12E-02 K-40 <6.25E-01 0.00E+00 6.25E-01 Sample ID: 358052 Sample Dates: 10/13/2014 - 10/20/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.55E-02 0.00E+00 1.55E-02 Cs-134 <1.34E-02 0.00E+00 1.34E-02 Cs-137 <1.68E-02 0.00E+00 1.68E-02 Be-7 <1.37E-01 0.00E+00 1.37E-01 K-40 <5.73E-01 0.00E+00 5.73E-01 Sample ID: 358660 Sample Dates: 10/20/2014 - 10/27/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.51E-02 0.00E+00 2.51E-02 Cs-134 <1.03E-02 0.00E+00 1.03E-02 Cs-137 <1.88E-02 0.00E+00 1.88E-02 Be-7 <1.54E-01 0.00E+00 1.54E-01 K-40 1.52E-01 1.96E-01 3.14E-01 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 20 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 359302 Sample Dates: 10/27/2014 - 11/3/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.12E-02 0.00E+00 1.12E-02 Cs-134 <2.25E-02 0.00E+00 2.25E-02 Cs-137 <4.80E-03 0.00E+00 4.80E-03 Be-7 <1.19E-01 0.00E+00 1.19E-01 K-40 5.36E-01 3.11E-01 3.69E-01 Sample ID: 360034 Sample Dates: 11/3/2014 - 11/10/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.01E-02 0.00E+00 2.01E-02 Cs-134 <1.17E-02 0.00E+00 1.17E-02 Cs-137 <9.99E-03 0.00E+00 9.99E-03 Be-7 <1.43E-01 0.00E+00 1.43E-01 K-40 3.65E-01 2.15E-01 2.34E-01 Sample ID: 360716 Sample Dates: 11/10/2014 - 11/17/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.79E-02 0.00E+00 1.79E-02 Cs-134 <1.54E-02 0.00E+00 1.54E-02 Cs-137 <1.92E-02 0.00E+00 1.92E-02 Be-7 <1.22E-01 0.00E+00 1.22E-01 K-40 3.83E-01 2.41E-01 2.56E-01 Sample ID: 361578 Sample Dates: 11/17/2014 - 11/24/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.99E-02 0.00E+00 1.99E-02 Cs-134 <1.71E-02 0.00E+00 1.71E-02 Cs-137 <1.65E-02 0.00E+00 1.65E-02 Be-7 <1.57E-01 0.00E+00 1.57E-01 K-40 <6.56E-01 0.00E+00 6.56E-01 Sample ID: 361957 Sample Dates: 11/24/2014 - 12/1/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.23E-02 0.00E+00 1.23E-02 Cs-134 <9.52E-03 0.00E+00 9.52E-03 Cs-137 <9.33E-03 0.00E+00 9.33E-03 Be-7 <3.38E-02 0.00E+00 3.38E-02 K-40 5.26E-01 1.82E-01 1.49E-01 Sample ID: 362787 Sample Dates: 12/1/2014 - 12/8/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.73E-02 0.00E+00 2.73E-02 Cs-134 <1.32E-02 0.00E+00 1.32E-02 Cs-137 <4.14E-03 0.00E+00 4.14E-03 Be-7 <1.06E-01 0.00E+00 1.06E-01 K-40 7.02E-01 4.63E-01 6.80E-01 Sample ID: 363527 Sample Dates: 12/8/2014 - 12/15/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.25E-02 0.00E+00 1.25E-02 Cs-134 <1.11E-02 0.00E+00 1.11E-02 Cs-137 <1.39E-02 0.00E+00 1.39E-02 Be-7 <6.69E-02 0.00E+00 6.69E-02 K-40 4.35E-01 1.63E-01 3.93E-02 Sample ID: 363974 Sample Dates: 12/15/2014 - 12/22/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.53E-02 0.00E+00 1.53E-02 Cs-134 <1.06E-02 0.00E+00 1.06E-02 Cs-137 <1.17E-02 0.00E+00 1.17E-02 Be-7 <1.00E-01 0.00E+00 1.00E-01 K-40 4.04E-01 1.72E-01 4.76E-02 Sample ID: 364516 Sample Dates: 12/22/2014 - 12/29/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.08E-02 0.00E+00 1.08E-02 Cs-134 <1.09E-02 0.00E+00 1.09E-02 Cs-137 <1.21E-02 0.00E+00 1.21E-02 Be-7 <8.21E-02 0.00E+00 8.21E-02 K-40 4.41E-01 1.63E-01 3.86E-02 Sample Point 078.1 [ INDICATOR - WSW @ 0.53 miles ]

Sample ID: 280640 Sample Dates: 12/30/2013 - 1/6/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.49E-02 0.00E+00 2.49E-02 Cs-134 <1.80E-02 0.00E+00 1.80E-02 Cs-137 <1.98E-02 0.00E+00 1.98E-02 Be-7 <1.71E-01 0.00E+00 1.71E-01 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 21 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 280640 Sample Dates: 12/30/2013 - 1/6/2014 Nuclide Activity Sigma Error 1 LLD K-40 4.63E-01 1.38E-01 7.62E-02 Sample ID: 280813 Sample Dates: 1/6/2014 - 1/13/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.18E-02 0.00E+00 2.18E-02 Cs-134 <1.45E-02 0.00E+00 1.45E-02 Cs-137 <2.53E-02 0.00E+00 2.53E-02 Be-7 <1.32E-01 0.00E+00 1.32E-01 K-40 6.30E-01 1.56E-01 7.82E-02 Sample ID: 281172 Sample Dates: 1/13/2014 - 1/20/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.26E-02 0.00E+00 1.26E-02 Cs-134 <1.16E-02 0.00E+00 1.16E-02 Cs-137 <1.11E-02 0.00E+00 1.11E-02 Be-7 <8.19E-02 0.00E+00 8.19E-02 K-40 3.13E-01 7.83E-02 5.29E-02 Sample ID: 281493 Sample Dates: 1/20/2014 - 1/27/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.47E-02 0.00E+00 1.47E-02 Cs-134 <1.24E-02 0.00E+00 1.24E-02 Cs-137 <1.33E-02 0.00E+00 1.33E-02 Be-7 <5.44E-02 0.00E+00 5.44E-02 K-40 3.32E-01 1.05E-01 2.09E-01 Sample ID: 282116 Sample Dates: 1/27/2014 - 2/3/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.97E-02 0.00E+00 1.97E-02 Cs-134 <1.83E-02 0.00E+00 1.83E-02 Cs-137 <1.14E-02 0.00E+00 1.14E-02 Be-7 <1.47E-01 0.00E+00 1.47E-01 K-40 6.17E-01 1.32E-01 2.57E-01 Sample ID: 282928 Sample Dates: 2/3/2014 - 2/10/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.41E-02 0.00E+00 1.41E-02 Cs-134 <8.47E-03 0.00E+00 8.47E-03 Cs-137 <9.07E-03 0.00E+00 9.07E-03 Be-7 <6.38E-02 0.00E+00 6.38E-02 K-40 4.94E-01 1.01E-01 1.47E-01 Sample ID: 283375 Sample Dates: 2/10/2014 - 2/17/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.39E-02 0.00E+00 1.39E-02 Cs-134 <9.44E-03 0.00E+00 9.44E-03 Cs-137 <8.49E-03 0.00E+00 8.49E-03 Be-7 <7.53E-02 0.00E+00 7.53E-02 K-40 6.75E-01 8.94E-02 3.20E-02 Sample ID: 284542 Sample Dates: 2/17/2014 - 2/24/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.45E-02 0.00E+00 1.45E-02 Cs-134 <9.56E-03 0.00E+00 9.56E-03 Cs-137 <1.12E-02 0.00E+00 1.12E-02 Be-7 <1.08E-01 0.00E+00 1.08E-01 K-40 <3.93E-01 0.00E+00 3.93E-01 Sample ID: 285103 Sample Dates: 2/24/2014 - 3/3/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.85E-02 0.00E+00 1.85E-02 Cs-134 <1.24E-02 0.00E+00 1.24E-02 Cs-137 <1.14E-02 0.00E+00 1.14E-02 Be-7 <1.41E-01 0.00E+00 1.41E-01 K-40 3.82E-01 1.33E-01 2.70E-01 Sample ID: 285708 Sample Dates: 3/3/2014 - 3/10/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.00E-02 0.00E+00 1.00E-02 Cs-134 <6.32E-03 0.00E+00 6.32E-03 Cs-137 <9.77E-03 0.00E+00 9.77E-03 Be-7 <6.91E-02 0.00E+00 6.91E-02 K-40 2.79E-01 6.71E-02 8.77E-02 Sample ID: 286212 Sample Dates: 3/10/2014 - 3/17/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.53E-02 0.00E+00 2.53E-02 Cs-134 <2.26E-02 0.00E+00 2.26E-02 Cs-137 <1.37E-02 0.00E+00 1.37E-02 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 22 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 286212 Sample Dates: 3/10/2014 - 3/17/2014 Nuclide Activity Sigma Error 1 LLD Be-7 <1.57E-01 0.00E+00 1.57E-01 K-40 <6.23E-01 0.00E+00 6.23E-01 Sample ID: 287097 Sample Dates: 3/17/2014 - 3/24/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.28E-02 0.00E+00 1.28E-02 Cs-134 <1.21E-02 0.00E+00 1.21E-02 Cs-137 <1.05E-02 0.00E+00 1.05E-02 Be-7 <8.88E-02 0.00E+00 8.88E-02 K-40 3.49E-01 8.23E-02 1.87E-01 Sample ID: 288348 Sample Dates: 3/24/2014 - 3/31/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.27E-02 0.00E+00 1.27E-02 Cs-134 <1.12E-02 0.00E+00 1.12E-02 Cs-137 <1.21E-02 0.00E+00 1.21E-02 Be-7 <1.03E-01 0.00E+00 1.03E-01 K-40 4.57E-01 1.02E-01 2.07E-01 Sample ID: 289072 Sample Dates: 3/31/2014 - 4/7/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.06E-02 0.00E+00 2.06E-02 Cs-134 <1.30E-02 0.00E+00 1.30E-02 Cs-137 <1.98E-02 0.00E+00 1.98E-02 Be-7 <1.29E-01 0.00E+00 1.29E-01 K-40 6.48E-01 1.38E-01 2.22E-01 Sample ID: 289458 Sample Dates: 4/7/2014 - 4/14/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.20E-02 0.00E+00 2.20E-02 Cs-134 <2.31E-02 0.00E+00 2.31E-02 Cs-137 <2.18E-02 0.00E+00 2.18E-02 Be-7 <1.95E-01 0.00E+00 1.95E-01 K-40 2.46E-01 1.03E-01 2.99E-01 Sample ID: 289868 Sample Dates: 4/14/2014 - 4/21/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.36E-02 0.00E+00 1.36E-02 Cs-134 <1.29E-02 0.00E+00 1.29E-02 Cs-137 <1.42E-02 0.00E+00 1.42E-02 Be-7 <7.23E-02 0.00E+00 7.23E-02 K-40 4.75E-01 9.87E-02 1.30E-01 Sample ID: 291473 Sample Dates: 4/21/2014 - 4/28/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.52E-02 0.00E+00 2.52E-02 Cs-134 <1.76E-02 0.00E+00 1.76E-02 Cs-137 <1.77E-02 0.00E+00 1.77E-02 Be-7 <1.10E-01 0.00E+00 1.10E-01 K-40 5.64E-01 1.26E-01 3.47E-01 Sample ID: 292767 Sample Dates: 4/28/2014 - 5/5/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.06E-02 0.00E+00 2.06E-02 Cs-134 <1.46E-02 0.00E+00 1.46E-02 Cs-137 <2.22E-02 0.00E+00 2.22E-02 Be-7 <1.62E-01 0.00E+00 1.62E-01 K-40 4.07E-01 1.09E-01 2.63E-01 Sample ID: 293029 Sample Dates: 5/5/2014 - 5/12/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.34E-02 0.00E+00 1.34E-02 Cs-134 <1.39E-02 0.00E+00 1.39E-02 Cs-137 <1.59E-02 0.00E+00 1.59E-02 Be-7 <8.65E-02 0.00E+00 8.65E-02 K-40 1.46E-01 7.70E-02 6.26E-02 Sample ID: 294660 Sample Dates: 5/12/2014 - 5/19/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.40E-02 0.00E+00 1.40E-02 Cs-134 <1.22E-02 0.00E+00 1.22E-02 Cs-137 <1.44E-02 0.00E+00 1.44E-02 Be-7 <9.92E-02 0.00E+00 9.92E-02 K-40 3.06E-01 9.71E-02 1.72E-01 Sample ID: 295169 Sample Dates: 5/19/2014 - 5/27/2014 Nuclide Activity Sigma Error 1 LLD I-131 <4.34E-02 0.00E+00 4.34E-02 Cs-134 <1.08E-02 0.00E+00 1.08E-02 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 23 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 295169 Sample Dates: 5/19/2014 - 5/27/2014 Nuclide Activity Sigma Error 1 LLD Cs-137 <1.64E-02 0.00E+00 1.64E-02 Be-7 <1.52E-01 0.00E+00 1.52E-01 K-40 2.95E-01 8.50E-02 2.22E-01 Sample ID: 295430 Sample Dates: 5/27/2014 - 6/2/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.63E-02 0.00E+00 2.63E-02 Cs-134 <2.39E-02 0.00E+00 2.39E-02 Cs-137 <2.43E-02 0.00E+00 2.43E-02 Be-7 <2.22E-01 0.00E+00 2.22E-01 K-40 6.51E-01 1.49E-01 2.53E-01 Sample ID: 295945 Sample Dates: 6/2/2014 - 6/9/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.81E-02 0.00E+00 2.81E-02 Cs-134 <1.26E-02 0.00E+00 1.26E-02 Cs-137 <2.61E-02 0.00E+00 2.61E-02 Be-7 <1.48E-01 0.00E+00 1.48E-01 K-40 5.66E-01 1.27E-01 7.65E-02 Sample ID: 296190 Sample Dates: 6/9/2014 - 6/16/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.17E-02 0.00E+00 2.17E-02 Cs-134 <1.68E-02 0.00E+00 1.68E-02 Cs-137 <2.02E-02 0.00E+00 2.02E-02 Be-7 <1.65E-01 0.00E+00 1.65E-01 K-40 4.04E-01 1.08E-01 3.40E-01 Sample ID: 296711 Sample Dates: 6/16/2014 - 6/23/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.42E-02 0.00E+00 2.42E-02 Cs-134 <1.56E-02 0.00E+00 1.56E-02 Cs-137 <2.83E-02 0.00E+00 2.83E-02 Be-7 <1.46E-01 0.00E+00 1.46E-01 K-40 4.22E-01 1.45E-01 2.02E-01 Sample ID: 296938 Sample Dates: 6/23/2014 - 6/30/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.24E-02 0.00E+00 2.24E-02 Cs-134 <1.82E-02 0.00E+00 1.82E-02 Cs-137 <1.50E-02 0.00E+00 1.50E-02 Be-7 <1.36E-01 0.00E+00 1.36E-01 K-40 6.12E-01 1.34E-01 2.19E-01 Sample ID: 297335 Sample Dates: 6/30/2014 - 7/7/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.54E-02 0.00E+00 2.54E-02 Cs-134 <2.48E-02 0.00E+00 2.48E-02 Cs-137 <2.48E-02 0.00E+00 2.48E-02 Be-7 <1.78E-01 0.00E+00 1.78E-01 K-40 4.25E-01 1.10E-01 2.65E-01 Sample ID: 297623 Sample Dates: 7/7/2014 - 7/14/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.82E-02 0.00E+00 2.82E-02 Cs-134 <1.01E-02 0.00E+00 1.01E-02 Cs-137 <1.26E-02 0.00E+00 1.26E-02 Be-7 <9.69E-02 0.00E+00 9.69E-02 K-40 2.14E-01 1.95E-01 2.88E-01 Sample ID: 298159 Sample Dates: 7/14/2014 - 7/21/2014 Nuclide Activity Sigma Error 1 LLD I-131 <4.76E-02 0.00E+00 4.76E-02 Cs-134 <1.02E-02 0.00E+00 1.02E-02 Cs-137 <1.26E-02 0.00E+00 1.26E-02 Be-7 <1.69E-01 0.00E+00 1.69E-01 K-40 5.39E-01 2.76E-01 2.58E-01 Sample ID: 350195 Sample Dates: 7/21/2014 - 7/28/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.71E-02 0.00E+00 2.71E-02 Cs-134 <2.03E-02 0.00E+00 2.03E-02 Cs-137 <2.16E-02 0.00E+00 2.16E-02 Be-7 <1.73E-01 0.00E+00 1.73E-01 K-40 <5.51E-01 0.00E+00 5.51E-01 Sample ID: 350936 Sample Dates: 7/28/2014 - 8/4/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.66E-02 0.00E+00 1.66E-02 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 24 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 350936 Sample Dates: 7/28/2014 - 8/4/2014 Nuclide Activity Sigma Error 1 LLD Cs-134 <1.30E-02 0.00E+00 1.30E-02 Cs-137 <1.88E-02 0.00E+00 1.88E-02 Be-7 <1.44E-01 0.00E+00 1.44E-01 K-40 <5.75E-01 0.00E+00 5.75E-01 Sample ID: 351182 Sample Dates: 8/4/2014 - 8/11/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.04E-02 0.00E+00 2.04E-02 Cs-134 <1.88E-02 0.00E+00 1.88E-02 Cs-137 <1.92E-02 0.00E+00 1.92E-02 Be-7 <1.80E-01 0.00E+00 1.80E-01 K-40 5.62E-01 3.21E-01 3.80E-01 Sample ID: 351621 Sample Dates: 8/11/2014 - 8/18/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.61E-02 0.00E+00 1.61E-02 Cs-134 <1.92E-02 0.00E+00 1.92E-02 Cs-137 <1.60E-02 0.00E+00 1.60E-02 Be-7 <1.00E-01 0.00E+00 1.00E-01 K-40 3.21E-01 2.34E-01 2.91E-01 Sample ID: 353432 Sample Dates: 8/18/2014 - 8/25/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.20E-02 0.00E+00 2.20E-02 Cs-134 <3.43E-02 0.00E+00 3.43E-02 Cs-137 <1.67E-02 0.00E+00 1.67E-02 Be-7 <1.50E-01 0.00E+00 1.50E-01 K-40 3.95E-01 2.22E-01 8.24E-02 Sample ID: 354069 Sample Dates: 8/25/2014 - 9/2/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.73E-02 0.00E+00 1.73E-02 Cs-134 <1.70E-02 0.00E+00 1.70E-02 Cs-137 <1.13E-02 0.00E+00 1.13E-02 Be-7 <9.03E-02 0.00E+00 9.03E-02 K-40 <4.69E-01 0.00E+00 4.69E-01 Sample ID: 354451 Sample Dates: 9/2/2014 - 9/8/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.72E-02 0.00E+00 1.72E-02 Cs-134 <2.30E-02 0.00E+00 2.30E-02 Cs-137 <1.92E-02 0.00E+00 1.92E-02 Be-7 <1.40E-01 0.00E+00 1.40E-01 K-40 4.91E-01 3.30E-01 4.18E-01 Sample ID: 354767 Sample Dates: 9/8/2014 - 9/15/2014 Nuclide Activity Sigma Error 1 LLD I-131 <8.54E-03 0.00E+00 8.54E-03 Cs-134 <9.38E-03 0.00E+00 9.38E-03 Cs-137 <9.23E-03 0.00E+00 9.23E-03 Be-7 <5.94E-02 0.00E+00 5.94E-02 K-40 4.00E-01 1.45E-01 1.09E-01 Sample ID: 355176 Sample Dates: 9/15/2014 - 9/22/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.86E-02 0.00E+00 1.86E-02 Cs-134 <1.54E-02 0.00E+00 1.54E-02 Cs-137 <1.66E-02 0.00E+00 1.66E-02 Be-7 <1.35E-01 0.00E+00 1.35E-01 K-40 4.74E-01 2.65E-01 2.59E-01 Sample ID: 355645 Sample Dates: 9/22/2014 - 9/29/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.11E-02 0.00E+00 1.11E-02 Cs-134 <8.53E-03 0.00E+00 8.53E-03 Cs-137 <1.06E-02 0.00E+00 1.06E-02 Be-7 <5.41E-02 0.00E+00 5.41E-02 K-40 5.38E-01 2.01E-01 2.11E-01 Sample ID: 356509 Sample Dates: 9/29/2014 - 10/6/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.82E-02 0.00E+00 1.82E-02 Cs-134 <1.30E-02 0.00E+00 1.30E-02 Cs-137 <1.89E-02 0.00E+00 1.89E-02 Be-7 <1.67E-01 0.00E+00 1.67E-01 K-40 <5.36E-01 0.00E+00 5.36E-01 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 25 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 357054 Sample Dates: 10/6/2014 - 10/13/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.22E-02 0.00E+00 1.22E-02 Cs-134 <1.30E-02 0.00E+00 1.30E-02 Cs-137 <1.28E-02 0.00E+00 1.28E-02 Be-7 <1.19E-01 0.00E+00 1.19E-01 K-40 6.47E-01 2.81E-01 7.97E-02 Sample ID: 358053 Sample Dates: 10/13/2014 - 10/20/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.19E-02 0.00E+00 2.19E-02 Cs-134 <1.34E-02 0.00E+00 1.34E-02 Cs-137 <1.67E-02 0.00E+00 1.67E-02 Be-7 <1.49E-01 0.00E+00 1.49E-01 K-40 3.34E-01 2.03E-01 8.22E-02 Sample ID: 358661 Sample Dates: 10/20/2014 - 10/27/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.62E-02 0.00E+00 1.62E-02 Cs-134 <1.03E-02 0.00E+00 1.03E-02 Cs-137 <2.10E-02 0.00E+00 2.10E-02 Be-7 <1.32E-01 0.00E+00 1.32E-01 K-40 4.45E-01 3.05E-01 4.05E-01 Sample ID: 359304 Sample Dates: 10/27/2014 - 11/3/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.14E-02 0.00E+00 2.14E-02 Cs-134 <1.53E-02 0.00E+00 1.53E-02 Cs-137 <1.91E-02 0.00E+00 1.91E-02 Be-7 <1.56E-01 0.00E+00 1.56E-01 K-40 5.11E-01 2.89E-01 3.18E-01 Sample ID: 360035 Sample Dates: 11/3/2014 - 11/10/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.76E-02 0.00E+00 1.76E-02 Cs-134 <1.30E-02 0.00E+00 1.30E-02 Cs-137 <1.91E-02 0.00E+00 1.91E-02 Be-7 <9.22E-02 0.00E+00 9.22E-02 K-40 <5.61E-01 0.00E+00 5.61E-01 Sample ID: 360717 Sample Dates: 11/10/2014 - 11/17/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.50E-02 0.00E+00 2.50E-02 Cs-134 <1.33E-02 0.00E+00 1.33E-02 Cs-137 <1.65E-02 0.00E+00 1.65E-02 Be-7 <1.22E-01 0.00E+00 1.22E-01 K-40 <5.66E-01 0.00E+00 5.66E-01 Sample ID: 361579 Sample Dates: 11/17/2014 - 11/24/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.99E-02 0.00E+00 1.99E-02 Cs-134 <1.53E-02 0.00E+00 1.53E-02 Cs-137 <1.65E-02 0.00E+00 1.65E-02 Be-7 <1.20E-01 0.00E+00 1.20E-01 K-40 5.68E-01 2.65E-01 8.11E-02 Sample ID: 361958 Sample Dates: 11/24/2014 - 12/1/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.74E-02 0.00E+00 2.74E-02 Cs-134 <1.19E-02 0.00E+00 1.19E-02 Cs-137 <1.49E-02 0.00E+00 1.49E-02 Be-7 <8.64E-02 0.00E+00 8.64E-02 K-40 3.71E-01 2.53E-01 3.37E-01 Sample ID: 362788 Sample Dates: 12/1/2014 - 12/8/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.52E-02 0.00E+00 1.52E-02 Cs-134 <1.47E-02 0.00E+00 1.47E-02 Cs-137 <2.43E-02 0.00E+00 2.43E-02 Be-7 <9.11E-02 0.00E+00 9.11E-02 K-40 6.00E-01 2.74E-01 2.30E-01 Sample ID: 363528 Sample Dates: 12/8/2014 - 12/15/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.18E-02 0.00E+00 1.18E-02 Cs-134 <1.11E-02 0.00E+00 1.11E-02 Cs-137 <1.31E-02 0.00E+00 1.31E-02 Be-7 <8.84E-02 0.00E+00 8.84E-02 K-40 3.26E-01 1.65E-01 1.82E-01 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 26 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 363975 Sample Dates: 12/15/2014 - 12/22/2014 Nuclide Activity Sigma Error 1 LLD I-131 <9.48E-03 0.00E+00 9.48E-03 Cs-134 <1.24E-02 0.00E+00 1.24E-02 Cs-137 <1.43E-02 0.00E+00 1.43E-02 Be-7 <1.18E-01 0.00E+00 1.18E-01 K-40 4.57E-01 1.83E-01 4.77E-02 Sample ID: 364517 Sample Dates: 12/22/2014 - 12/29/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.30E-02 0.00E+00 1.30E-02 Cs-134 <9.72E-03 0.00E+00 9.72E-03 Cs-137 <1.36E-02 0.00E+00 1.36E-02 Be-7 <9.13E-02 0.00E+00 9.13E-02 K-40 5.41E-01 1.82E-01 3.86E-02 Sample Point 079 [ INDICATOR - NE @ 0.56 miles ]

Sample ID: 280637 Sample Dates: 12/30/2013 - 1/6/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.30E-02 0.00E+00 2.30E-02 Cs-134 <2.34E-02 0.00E+00 2.34E-02 Cs-137 <1.14E-02 0.00E+00 1.14E-02 Be-7 <1.85E-01 0.00E+00 1.85E-01 K-40 <5.50E-01 0.00E+00 5.50E-01 Sample ID: 280810 Sample Dates: 1/6/2014 - 1/13/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.66E-02 0.00E+00 2.66E-02 Cs-134 <1.70E-02 0.00E+00 1.70E-02 Cs-137 <2.18E-02 0.00E+00 2.18E-02 Be-7 <1.73E-01 0.00E+00 1.73E-01 K-40 <6.07E-01 0.00E+00 6.07E-01 Sample ID: 281169 Sample Dates: 1/13/2014 - 1/20/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.20E-02 0.00E+00 1.20E-02 Cs-134 <8.76E-03 0.00E+00 8.76E-03 Cs-137 <7.72E-03 0.00E+00 7.72E-03 Be-7 <6.00E-02 0.00E+00 6.00E-02 K-40 3.92E-01 8.76E-02 1.40E-01 Sample ID: 281490 Sample Dates: 1/20/2014 - 1/27/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.44E-02 0.00E+00 1.44E-02 Cs-134 <1.35E-02 0.00E+00 1.35E-02 Cs-137 <1.25E-02 0.00E+00 1.25E-02 Be-7 <6.88E-02 0.00E+00 6.88E-02 K-40 2.59E-01 7.47E-02 2.74E-01 Sample ID: 282113 Sample Dates: 1/27/2014 - 2/3/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.14E-02 0.00E+00 2.14E-02 Cs-134 <2.36E-02 0.00E+00 2.36E-02 Cs-137 <1.66E-02 0.00E+00 1.66E-02 Be-7 <1.44E-01 0.00E+00 1.44E-01 K-40 5.32E-01 1.22E-01 2.03E-01 Sample ID: 282925 Sample Dates: 2/3/2014 - 2/10/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.06E-02 0.00E+00 2.06E-02 Cs-134 <1.28E-02 0.00E+00 1.28E-02 Cs-137 <1.82E-02 0.00E+00 1.82E-02 Be-7 4.73E-02 3.34E-02 8.81E-02 K-40 6.35E-01 1.25E-01 6.60E-02 Sample ID: 283372 Sample Dates: 2/10/2014 - 2/17/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.62E-02 0.00E+00 1.62E-02 Cs-134 <1.25E-02 0.00E+00 1.25E-02 Cs-137 <1.01E-02 0.00E+00 1.01E-02 Be-7 <8.76E-02 0.00E+00 8.76E-02 K-40 3.42E-01 8.55E-02 5.78E-02 Sample ID: 284539 Sample Dates: 2/17/2014 - 2/24/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.24E-02 0.00E+00 2.24E-02 Cs-134 <1.60E-02 0.00E+00 1.60E-02 Cs-137 <1.46E-02 0.00E+00 1.46E-02 Be-7 <1.42E-01 0.00E+00 1.42E-01 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 27 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 284539 Sample Dates: 2/17/2014 - 2/24/2014 Nuclide Activity Sigma Error 1 LLD K-40 <5.26E-01 0.00E+00 5.26E-01 Sample ID: 285100 Sample Dates: 2/24/2014 - 3/3/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.82E-02 0.00E+00 1.82E-02 Cs-134 <1.41E-02 0.00E+00 1.41E-02 Cs-137 <2.18E-02 0.00E+00 2.18E-02 Be-7 <9.48E-02 0.00E+00 9.48E-02 K-40 <4.89E-01 0.00E+00 4.89E-01 Sample ID: 285705 Sample Dates: 3/3/2014 - 3/10/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.40E-02 0.00E+00 2.40E-02 Cs-134 <1.77E-02 0.00E+00 1.77E-02 Cs-137 <1.68E-02 0.00E+00 1.68E-02 Be-7 <9.78E-02 0.00E+00 9.78E-02 K-40 5.99E-01 1.57E-01 3.70E-01 Sample ID: 286209 Sample Dates: 3/10/2014 - 3/17/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.31E-02 0.00E+00 2.31E-02 Cs-134 <2.08E-02 0.00E+00 2.08E-02 Cs-137 <1.83E-02 0.00E+00 1.83E-02 Be-7 <1.76E-01 0.00E+00 1.76E-01 K-40 <4.05E-01 0.00E+00 4.05E-01 Sample ID: 287094 Sample Dates: 3/17/2014 - 3/24/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.58E-02 0.00E+00 1.58E-02 Cs-134 <9.50E-03 0.00E+00 9.50E-03 Cs-137 <1.48E-02 0.00E+00 1.48E-02 Be-7 <1.01E-01 0.00E+00 1.01E-01 K-40 <4.66E-01 0.00E+00 4.66E-01 Sample ID: 288345 Sample Dates: 3/24/2014 - 3/31/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.14E-02 0.00E+00 1.14E-02 Cs-134 <6.49E-03 0.00E+00 6.49E-03 Cs-137 <7.80E-03 0.00E+00 7.80E-03 Be-7 <7.45E-02 0.00E+00 7.45E-02 K-40 5.99E-01 8.39E-02 3.17E-02 Sample ID: 289069 Sample Dates: 3/31/2014 - 4/7/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.70E-02 0.00E+00 2.70E-02 Cs-134 <1.92E-02 0.00E+00 1.92E-02 Cs-137 <2.38E-02 0.00E+00 2.38E-02 Be-7 <1.93E-01 0.00E+00 1.93E-01 K-40 5.50E-01 1.26E-01 2.77E-01 Sample ID: 289455 Sample Dates: 4/7/2014 - 4/14/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.21E-02 0.00E+00 1.21E-02 Cs-134 <8.66E-03 0.00E+00 8.66E-03 Cs-137 <1.40E-02 0.00E+00 1.40E-02 Be-7 <7.14E-02 0.00E+00 7.14E-02 K-40 <4.34E-01 0.00E+00 4.34E-01 Sample ID: 289865 Sample Dates: 4/14/2014 - 4/21/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.00E-02 0.00E+00 1.00E-02 Cs-134 <8.22E-03 0.00E+00 8.22E-03 Cs-137 <1.34E-02 0.00E+00 1.34E-02 Be-7 <1.05E-01 0.00E+00 1.05E-01 K-40 <3.98E-01 0.00E+00 3.98E-01 Sample ID: 291470 Sample Dates: 4/21/2014 - 4/28/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.12E-02 0.00E+00 2.12E-02 Cs-134 <1.46E-02 0.00E+00 1.46E-02 Cs-137 <2.38E-02 0.00E+00 2.38E-02 Be-7 <1.45E-01 0.00E+00 1.45E-01 K-40 5.07E-01 1.19E-01 7.61E-02 Sample ID: 292764 Sample Dates: 4/28/2014 - 5/5/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.48E-02 0.00E+00 1.48E-02 Cs-134 <1.01E-02 0.00E+00 1.01E-02 Cs-137 <1.53E-02 0.00E+00 1.53E-02 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 28 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 292764 Sample Dates: 4/28/2014 - 5/5/2014 Nuclide Activity Sigma Error 1 LLD Be-7 <7.28E-02 0.00E+00 7.28E-02 K-40 <4.44E-01 0.00E+00 4.44E-01 Sample ID: 293026 Sample Dates: 5/5/2014 - 5/12/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.68E-02 0.00E+00 1.68E-02 Cs-134 <1.14E-02 0.00E+00 1.14E-02 Cs-137 <1.39E-02 0.00E+00 1.39E-02 Be-7 <1.13E-01 0.00E+00 1.13E-01 K-40 7.12E-01 1.52E-01 1.69E-01 Sample ID: 294657 Sample Dates: 5/12/2014 - 5/19/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.69E-02 0.00E+00 1.69E-02 Cs-134 <1.36E-02 0.00E+00 1.36E-02 Cs-137 <1.92E-02 0.00E+00 1.92E-02 Be-7 <1.03E-01 0.00E+00 1.03E-01 K-40 5.84E-01 1.19E-01 6.58E-02 Sample ID: 295166 Sample Dates: 5/19/2014 - 5/27/2014 Nuclide Activity Sigma Error 1 LLD I-131 <3.95E-02 0.00E+00 3.95E-02 Cs-134 <1.45E-02 0.00E+00 1.45E-02 Cs-137 <1.71E-02 0.00E+00 1.71E-02 Be-7 <1.02E-01 0.00E+00 1.02E-01 K-40 3.92E-01 9.80E-02 6.62E-02 Sample ID: 295427 Sample Dates: 5/27/2014 - 6/2/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.55E-02 0.00E+00 2.55E-02 Cs-134 <2.42E-02 0.00E+00 2.42E-02 Cs-137 <2.66E-02 0.00E+00 2.66E-02 Be-7 <1.72E-01 0.00E+00 1.72E-01 K-40 6.53E-01 1.50E-01 9.30E-02 Sample ID: 295942 Sample Dates: 6/2/2014 - 6/9/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.47E-02 0.00E+00 1.47E-02 Cs-134 <4.83E-03 0.00E+00 4.83E-03 Cs-137 <1.33E-02 0.00E+00 1.33E-02 Be-7 <1.20E-01 0.00E+00 1.20E-01 K-40 3.74E-01 9.34E-02 1.66E-01 Sample ID: 296187 Sample Dates: 6/9/2014 - 6/16/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.21E-02 0.00E+00 2.21E-02 Cs-134 <1.88E-02 0.00E+00 1.88E-02 Cs-137 <1.81E-02 0.00E+00 1.81E-02 Be-7 <1.05E-01 0.00E+00 1.05E-01 K-40 5.80E-01 1.18E-01 2.68E-01 Sample ID: 296708 Sample Dates: 6/16/2014 - 6/23/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.07E-02 0.00E+00 2.07E-02 Cs-134 <1.64E-02 0.00E+00 1.64E-02 Cs-137 <2.26E-02 0.00E+00 2.26E-02 Be-7 <1.69E-01 0.00E+00 1.69E-01 K-40 3.22E-01 1.22E-01 3.84E-01 Sample ID: 296935 Sample Dates: 6/23/2014 - 6/30/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.34E-02 0.00E+00 1.34E-02 Cs-134 <6.61E-03 0.00E+00 6.61E-03 Cs-137 <3.05E-03 0.00E+00 3.05E-03 Be-7 <7.48E-02 0.00E+00 7.48E-02 K-40 2.98E-01 7.70E-02 1.43E-01 Sample ID: 297332 Sample Dates: 6/30/2014 - 7/7/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.31E-02 0.00E+00 1.31E-02 Cs-134 <8.81E-03 0.00E+00 8.81E-03 Cs-137 <1.52E-02 0.00E+00 1.52E-02 Be-7 <1.39E-01 0.00E+00 1.39E-01 K-40 4.68E-01 1.05E-01 1.76E-01 Sample ID: 297620 Sample Dates: 7/7/2014 - 7/14/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.16E-02 0.00E+00 2.16E-02 Cs-134 <6.54E-03 0.00E+00 6.54E-03 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 29 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 297620 Sample Dates: 7/7/2014 - 7/14/2014 Nuclide Activity Sigma Error 1 LLD Cs-137 <1.01E-02 0.00E+00 1.01E-02 Be-7 <3.58E-02 0.00E+00 3.58E-02 K-40 4.86E-01 1.54E-01 3.06E-02 Sample ID: 298156 Sample Dates: 7/14/2014 - 7/21/2014 Nuclide Activity Sigma Error 1 LLD I-131 <3.60E-02 0.00E+00 3.60E-02 Cs-134 <1.49E-02 0.00E+00 1.49E-02 Cs-137 <1.85E-02 0.00E+00 1.85E-02 Be-7 <3.23E-02 0.00E+00 3.23E-02 K-40 <6.81E-01 0.00E+00 6.81E-01 Sample ID: 350196 Sample Dates: 7/21/2014 - 7/28/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.36E-02 0.00E+00 2.36E-02 Cs-134 <1.34E-02 0.00E+00 1.34E-02 Cs-137 <1.32E-02 0.00E+00 1.32E-02 Be-7 <1.63E-01 0.00E+00 1.63E-01 K-40 4.85E-01 2.46E-01 8.22E-02 Sample ID: 350937 Sample Dates: 7/28/2014 - 8/4/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.58E-02 0.00E+00 2.58E-02 Cs-134 <1.03E-02 0.00E+00 1.03E-02 Cs-137 <2.10E-02 0.00E+00 2.10E-02 Be-7 <1.02E-01 0.00E+00 1.02E-01 K-40 <6.11E-01 0.00E+00 6.11E-01 Sample ID: 351183 Sample Dates: 8/4/2014 - 8/11/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.23E-02 0.00E+00 2.23E-02 Cs-134 <1.05E-02 0.00E+00 1.05E-02 Cs-137 <1.92E-02 0.00E+00 1.92E-02 Be-7 <1.49E-01 0.00E+00 1.49E-01 K-40 3.72E-01 2.62E-01 3.29E-01 Sample ID: 351622 Sample Dates: 8/11/2014 - 8/18/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.77E-02 0.00E+00 1.77E-02 Cs-134 <1.89E-02 0.00E+00 1.89E-02 Cs-137 <1.83E-02 0.00E+00 1.83E-02 Be-7 <9.89E-02 0.00E+00 9.89E-02 K-40 <5.78E-01 0.00E+00 5.78E-01 Sample ID: 353433 Sample Dates: 8/18/2014 - 8/25/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.03E-02 0.00E+00 2.03E-02 Cs-134 <2.86E-02 0.00E+00 2.86E-02 Cs-137 <1.96E-02 0.00E+00 1.96E-02 Be-7 <1.51E-01 0.00E+00 1.51E-01 K-40 5.53E-01 2.65E-01 8.32E-02 Sample ID: 354071 Sample Dates: 8/25/2014 - 9/2/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.40E-02 0.00E+00 2.40E-02 Cs-134 <1.71E-02 0.00E+00 1.71E-02 Cs-137 <1.43E-02 0.00E+00 1.43E-02 Be-7 <9.05E-02 0.00E+00 9.05E-02 K-40 4.31E-01 2.48E-01 2.74E-01 Sample ID: 354452 Sample Dates: 9/2/2014 - 9/8/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.60E-02 0.00E+00 2.60E-02 Cs-134 <2.67E-02 0.00E+00 2.67E-02 Cs-137 <2.23E-02 0.00E+00 2.23E-02 Be-7 <1.40E-01 0.00E+00 1.40E-01 K-40 7.88E-01 3.64E-01 3.15E-01 Sample ID: 354768 Sample Dates: 9/8/2014 - 9/15/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.00E-02 0.00E+00 1.00E-02 Cs-134 <1.09E-02 0.00E+00 1.09E-02 Cs-137 <7.81E-03 0.00E+00 7.81E-03 Be-7 <5.03E-02 0.00E+00 5.03E-02 K-40 4.82E-01 1.51E-01 2.97E-02 Sample ID: 355178 Sample Dates: 9/15/2014 - 9/22/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.87E-02 0.00E+00 1.87E-02 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 30 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 355178 Sample Dates: 9/15/2014 - 9/22/2014 Nuclide Activity Sigma Error 1 LLD Cs-134 <1.55E-02 0.00E+00 1.55E-02 Cs-137 <1.94E-02 0.00E+00 1.94E-02 Be-7 <1.22E-01 0.00E+00 1.22E-01 K-40 3.42E-01 2.38E-01 2.77E-01 Sample ID: 355646 Sample Dates: 9/22/2014 - 9/29/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.97E-02 0.00E+00 1.97E-02 Cs-134 <1.03E-02 0.00E+00 1.03E-02 Cs-137 <1.29E-02 0.00E+00 1.29E-02 Be-7 <1.32E-01 0.00E+00 1.32E-01 K-40 6.80E-01 2.89E-01 8.01E-02 Sample ID: 356511 Sample Dates: 9/29/2014 - 10/6/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.38E-02 0.00E+00 2.38E-02 Cs-134 <1.98E-02 0.00E+00 1.98E-02 Cs-137 <1.62E-02 0.00E+00 1.62E-02 Be-7 <1.34E-01 0.00E+00 1.34E-01 K-40 5.56E-01 2.78E-01 2.39E-01 Sample ID: 357055 Sample Dates: 10/6/2014 - 10/13/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.14E-02 0.00E+00 2.14E-02 Cs-134 <1.02E-02 0.00E+00 1.02E-02 Cs-137 <1.60E-02 0.00E+00 1.60E-02 Be-7 <1.31E-01 0.00E+00 1.31E-01 K-40 <5.85E-01 0.00E+00 5.85E-01 Sample ID: 358054 Sample Dates: 10/13/2014 - 10/20/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.37E-02 0.00E+00 2.37E-02 Cs-134 <1.07E-02 0.00E+00 1.07E-02 Cs-137 <1.96E-02 0.00E+00 1.96E-02 Be-7 <8.48E-02 0.00E+00 8.48E-02 K-40 4.61E-01 2.41E-01 8.33E-02 Sample ID: 358662 Sample Dates: 10/20/2014 - 10/27/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.26E-02 0.00E+00 2.26E-02 Cs-134 <1.68E-02 0.00E+00 1.68E-02 Cs-137 <1.63E-02 0.00E+00 1.63E-02 Be-7 <1.44E-01 0.00E+00 1.44E-01 K-40 <5.36E-01 0.00E+00 5.36E-01 Sample ID: 359306 Sample Dates: 10/27/2014 - 11/3/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.14E-02 0.00E+00 2.14E-02 Cs-134 <1.53E-02 0.00E+00 1.53E-02 Cs-137 <2.13E-02 0.00E+00 2.13E-02 Be-7 <1.33E-01 0.00E+00 1.33E-01 K-40 <5.43E-01 0.00E+00 5.43E-01 Sample ID: 360036 Sample Dates: 11/3/2014 - 11/10/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.75E-02 0.00E+00 1.75E-02 Cs-134 <1.00E-02 0.00E+00 1.00E-02 Cs-137 <1.63E-02 0.00E+00 1.63E-02 Be-7 <9.20E-02 0.00E+00 9.20E-02 K-40 <4.15E-01 0.00E+00 4.15E-01 Sample ID: 360718 Sample Dates: 11/10/2014 - 11/17/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.00E-02 0.00E+00 2.00E-02 Cs-134 <1.87E-02 0.00E+00 1.87E-02 Cs-137 <1.65E-02 0.00E+00 1.65E-02 Be-7 <1.22E-01 0.00E+00 1.22E-01 K-40 4.80E-01 2.44E-01 8.14E-02 Sample ID: 361580 Sample Dates: 11/17/2014 - 11/24/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.00E-02 0.00E+00 2.00E-02 Cs-134 <1.05E-02 0.00E+00 1.05E-02 Cs-137 <1.31E-02 0.00E+00 1.31E-02 Be-7 <1.34E-01 0.00E+00 1.34E-01 K-40 4.63E-01 2.86E-01 3.41E-01 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 31 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 361959 Sample Dates: 11/24/2014 - 12/1/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.95E-02 0.00E+00 2.95E-02 Cs-134 <3.00E-03 0.00E+00 3.00E-03 Cs-137 <1.02E-02 0.00E+00 1.02E-02 Be-7 <1.12E-01 0.00E+00 1.12E-01 K-40 <5.03E-01 0.00E+00 5.03E-01 Sample ID: 362789 Sample Dates: 12/1/2014 - 12/8/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.52E-02 0.00E+00 1.52E-02 Cs-134 <8.86E-03 0.00E+00 8.86E-03 Cs-137 <1.01E-02 0.00E+00 1.01E-02 Be-7 <8.80E-02 0.00E+00 8.80E-02 K-40 6.27E-01 1.95E-01 3.77E-02 Sample ID: 363529 Sample Dates: 12/8/2014 - 12/15/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.13E-02 0.00E+00 2.13E-02 Cs-134 <1.37E-02 0.00E+00 1.37E-02 Cs-137 <1.71E-02 0.00E+00 1.71E-02 Be-7 <1.48E-01 0.00E+00 1.48E-01 K-40 5.17E-01 2.60E-01 2.29E-01 Sample ID: 363976 Sample Dates: 12/15/2014 - 12/22/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.11E-02 0.00E+00 2.11E-02 Cs-134 <1.40E-02 0.00E+00 1.40E-02 Cs-137 <1.43E-02 0.00E+00 1.43E-02 Be-7 <1.18E-01 0.00E+00 1.18E-01 K-40 5.60E-01 2.24E-01 1.99E-01 Sample ID: 364518 Sample Dates: 12/22/2014 - 12/29/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.22E-02 0.00E+00 1.22E-02 Cs-134 <6.40E-03 0.00E+00 6.40E-03 Cs-137 <1.29E-02 0.00E+00 1.29E-02 Be-7 <7.71E-02 0.00E+00 7.71E-02 K-40 4.72E-01 1.82E-01 1.49E-01 Sample Point 081 [ CONTROL - SE @ 9.33 miles ]

Sample ID: 280638 Sample Dates: 12/30/2013 - 1/6/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.50E-02 0.00E+00 2.50E-02 Cs-134 <2.19E-02 0.00E+00 2.19E-02 Cs-137 <1.44E-02 0.00E+00 1.44E-02 Be-7 <1.26E-01 0.00E+00 1.26E-01 K-40 7.06E-01 1.41E-01 2.68E-01 Sample ID: 280811 Sample Dates: 1/6/2014 - 1/13/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.11E-02 0.00E+00 2.11E-02 Cs-134 <1.95E-02 0.00E+00 1.95E-02 Cs-137 <2.26E-02 0.00E+00 2.26E-02 Be-7 <1.93E-01 0.00E+00 1.93E-01 K-40 7.04E-01 1.70E-01 2.62E-01 Sample ID: 281170 Sample Dates: 1/13/2014 - 1/20/2014 Nuclide Activity Sigma Error 1 LLD I-131 <9.26E-03 0.00E+00 9.26E-03 Cs-134 <7.75E-03 0.00E+00 7.75E-03 Cs-137 <1.17E-02 0.00E+00 1.17E-02 Be-7 <7.32E-02 0.00E+00 7.32E-02 K-40 5.15E-01 7.85E-02 1.28E-01 Sample ID: 281491 Sample Dates: 1/20/2014 - 1/27/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.00E-02 0.00E+00 2.00E-02 Cs-134 <1.11E-02 0.00E+00 1.11E-02 Cs-137 <1.20E-02 0.00E+00 1.20E-02 Be-7 <1.09E-01 0.00E+00 1.09E-01 K-40 5.17E-01 1.34E-01 1.71E-01 Sample ID: 282114 Sample Dates: 1/27/2014 - 2/3/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.00E-02 0.00E+00 2.00E-02 Cs-134 <1.46E-02 0.00E+00 1.46E-02 Cs-137 <2.18E-02 0.00E+00 2.18E-02 Be-7 <1.65E-01 0.00E+00 1.65E-01 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 32 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 282114 Sample Dates: 1/27/2014 - 2/3/2014 Nuclide Activity Sigma Error 1 LLD K-40 <5.66E-01 0.00E+00 5.66E-01 Sample ID: 282926 Sample Dates: 2/3/2014 - 2/10/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.29E-02 0.00E+00 1.29E-02 Cs-134 <1.24E-02 0.00E+00 1.24E-02 Cs-137 <1.78E-02 0.00E+00 1.78E-02 Be-7 <1.02E-01 0.00E+00 1.02E-01 K-40 3.73E-01 9.04E-02 1.62E-01 Sample ID: 283373 Sample Dates: 2/10/2014 - 2/17/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.22E-02 0.00E+00 2.22E-02 Cs-134 <1.78E-02 0.00E+00 1.78E-02 Cs-137 <1.69E-02 0.00E+00 1.69E-02 Be-7 <1.67E-01 0.00E+00 1.67E-01 K-40 4.27E-01 1.48E-01 3.47E-01 Sample ID: 284540 Sample Dates: 2/17/2014 - 2/24/2014 Nuclide Activity Sigma Error 1 LLD I-131 <8.85E-03 0.00E+00 8.85E-03 Cs-134 <9.26E-03 0.00E+00 9.26E-03 Cs-137 <1.24E-02 0.00E+00 1.24E-02 Be-7 <7.36E-02 0.00E+00 7.36E-02 K-40 1.72E-01 8.39E-02 1.62E-01 Sample ID: 285101 Sample Dates: 2/24/2014 - 3/3/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.35E-02 0.00E+00 2.35E-02 Cs-134 <1.47E-02 0.00E+00 1.47E-02 Cs-137 <2.46E-02 0.00E+00 2.46E-02 Be-7 <1.42E-01 0.00E+00 1.42E-01 K-40 4.50E-01 1.13E-01 2.13E-01 Sample ID: 285706 Sample Dates: 3/3/2014 - 3/10/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.31E-02 0.00E+00 1.31E-02 Cs-134 <1.37E-02 0.00E+00 1.37E-02 Cs-137 <1.56E-02 0.00E+00 1.56E-02 Be-7 <1.50E-01 0.00E+00 1.50E-01 K-40 5.30E-01 1.13E-01 3.04E-01 Sample ID: 286210 Sample Dates: 3/10/2014 - 3/17/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.32E-02 0.00E+00 2.32E-02 Cs-134 <1.77E-02 0.00E+00 1.77E-02 Cs-137 <2.29E-02 0.00E+00 2.29E-02 Be-7 <1.39E-01 0.00E+00 1.39E-01 K-40 3.89E-01 1.68E-01 2.06E-01 Sample ID: 287095 Sample Dates: 3/17/2014 - 3/24/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.39E-02 0.00E+00 2.39E-02 Cs-134 <1.87E-02 0.00E+00 1.87E-02 Cs-137 <2.00E-02 0.00E+00 2.00E-02 Be-7 <1.53E-01 0.00E+00 1.53E-01 K-40 5.12E-01 1.21E-01 2.58E-01 Sample ID: 288346 Sample Dates: 3/24/2014 - 3/31/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.32E-02 0.00E+00 1.32E-02 Cs-134 <9.45E-03 0.00E+00 9.45E-03 Cs-137 <1.48E-02 0.00E+00 1.48E-02 Be-7 <7.21E-02 0.00E+00 7.21E-02 K-40 4.31E-01 7.74E-02 3.76E-02 Sample ID: 289070 Sample Dates: 3/31/2014 - 4/7/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.92E-02 0.00E+00 2.92E-02 Cs-134 <1.47E-02 0.00E+00 1.47E-02 Cs-137 <1.78E-02 0.00E+00 1.78E-02 Be-7 <1.53E-01 0.00E+00 1.53E-01 K-40 4.82E-01 1.43E-01 2.72E-01 Sample ID: 289456 Sample Dates: 4/7/2014 - 4/14/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.86E-02 0.00E+00 1.86E-02 Cs-134 <1.66E-02 0.00E+00 1.66E-02 Cs-137 <1.68E-02 0.00E+00 1.68E-02 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 33 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 289456 Sample Dates: 4/7/2014 - 4/14/2014 Nuclide Activity Sigma Error 1 LLD Be-7 <1.78E-01 0.00E+00 1.78E-01 K-40 <5.83E-01 0.00E+00 5.83E-01 Sample ID: 289866 Sample Dates: 4/14/2014 - 4/21/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.49E-02 0.00E+00 2.49E-02 Cs-134 <1.50E-02 0.00E+00 1.50E-02 Cs-137 <1.23E-02 0.00E+00 1.23E-02 Be-7 <1.80E-01 0.00E+00 1.80E-01 K-40 <5.60E-01 0.00E+00 5.60E-01 Sample ID: 291471 Sample Dates: 4/21/2014 - 4/28/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.53E-02 0.00E+00 2.53E-02 Cs-134 <2.19E-02 0.00E+00 2.19E-02 Cs-137 <1.85E-02 0.00E+00 1.85E-02 Be-7 <1.12E-01 0.00E+00 1.12E-01 K-40 3.87E-01 1.29E-01 7.62E-02 Sample ID: 292765 Sample Dates: 4/28/2014 - 5/5/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.36E-02 0.00E+00 2.36E-02 Cs-134 <1.63E-02 0.00E+00 1.63E-02 Cs-137 <2.86E-02 0.00E+00 2.86E-02 Be-7 <1.62E-01 0.00E+00 1.62E-01 K-40 <5.48E-01 0.00E+00 5.48E-01 Sample ID: 293027 Sample Dates: 5/5/2014 - 5/12/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.74E-02 0.00E+00 1.74E-02 Cs-134 <1.68E-02 0.00E+00 1.68E-02 Cs-137 <2.37E-02 0.00E+00 2.37E-02 Be-7 <1.56E-01 0.00E+00 1.56E-01 K-40 7.33E-01 1.44E-01 7.62E-02 Sample ID: 294658 Sample Dates: 5/12/2014 - 5/19/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.24E-02 0.00E+00 1.24E-02 Cs-134 <9.21E-03 0.00E+00 9.21E-03 Cs-137 <1.51E-02 0.00E+00 1.51E-02 Be-7 <6.89E-02 0.00E+00 6.89E-02 K-40 3.50E-01 7.00E-02 3.78E-02 Sample ID: 295167 Sample Dates: 5/19/2014 - 5/27/2014 Nuclide Activity Sigma Error 1 LLD I-131 <3.50E-02 0.00E+00 3.50E-02 Cs-134 <1.73E-02 0.00E+00 1.73E-02 Cs-137 <2.12E-02 0.00E+00 2.12E-02 Be-7 <1.04E-01 0.00E+00 1.04E-01 K-40 1.72E-01 1.07E-01 2.23E-01 Sample ID: 295428 Sample Dates: 5/27/2014 - 6/2/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.85E-02 0.00E+00 2.85E-02 Cs-134 <2.09E-02 0.00E+00 2.09E-02 Cs-137 <3.00E-02 0.00E+00 3.00E-02 Be-7 <1.46E-01 0.00E+00 1.46E-01 K-40 <6.97E-01 0.00E+00 6.97E-01 Sample ID: 295943 Sample Dates: 6/2/2014 - 6/9/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.39E-02 0.00E+00 2.39E-02 Cs-134 <1.46E-02 0.00E+00 1.46E-02 Cs-137 <1.40E-02 0.00E+00 1.40E-02 Be-7 <9.58E-02 0.00E+00 9.58E-02 K-40 3.74E-01 1.23E-01 2.67E-01 Sample ID: 296188 Sample Dates: 6/9/2014 - 6/16/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.31E-02 0.00E+00 2.31E-02 Cs-134 <1.52E-02 0.00E+00 1.52E-02 Cs-137 <2.60E-02 0.00E+00 2.60E-02 Be-7 <2.04E-01 0.00E+00 2.04E-01 K-40 <6.84E-01 0.00E+00 6.84E-01 Sample ID: 296709 Sample Dates: 6/16/2014 - 6/23/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.41E-02 0.00E+00 2.41E-02 Cs-134 <1.21E-02 0.00E+00 1.21E-02 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 34 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 296709 Sample Dates: 6/16/2014 - 6/23/2014 Nuclide Activity Sigma Error 1 LLD Cs-137 <4.41E-03 0.00E+00 4.41E-03 Be-7 <1.52E-01 0.00E+00 1.52E-01 K-40 <5.96E-01 0.00E+00 5.96E-01 Sample ID: 296936 Sample Dates: 6/23/2014 - 6/30/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.34E-02 0.00E+00 2.34E-02 Cs-134 <1.72E-02 0.00E+00 1.72E-02 Cs-137 <1.76E-02 0.00E+00 1.76E-02 Be-7 <9.85E-02 0.00E+00 9.85E-02 K-40 4.07E-01 1.09E-01 2.18E-01 Sample ID: 297333 Sample Dates: 6/30/2014 - 7/7/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.88E-02 0.00E+00 2.88E-02 Cs-134 <1.42E-02 0.00E+00 1.42E-02 Cs-137 <1.80E-02 0.00E+00 1.80E-02 Be-7 <1.96E-01 0.00E+00 1.96E-01 K-40 <5.70E-01 0.00E+00 5.70E-01 Sample ID: 297621 Sample Dates: 7/7/2014 - 7/14/2014 Nuclide Activity Sigma Error 1 LLD I-131 <4.44E-02 0.00E+00 4.44E-02 Cs-134 <1.06E-02 0.00E+00 1.06E-02 Cs-137 <1.65E-02 0.00E+00 1.65E-02 Be-7 <1.51E-01 0.00E+00 1.51E-01 K-40 <4.23E-01 0.00E+00 4.23E-01 Sample ID: 298157 Sample Dates: 7/14/2014 - 7/21/2014 Nuclide Activity Sigma Error 1 LLD I-131 <3.99E-02 0.00E+00 3.99E-02 Cs-134 <1.82E-02 0.00E+00 1.82E-02 Cs-137 <1.86E-02 0.00E+00 1.86E-02 Be-7 <1.44E-01 0.00E+00 1.44E-01 K-40 <6.37E-01 0.00E+00 6.37E-01 Sample ID: 350197 Sample Dates: 7/21/2014 - 7/28/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.39E-02 0.00E+00 2.39E-02 Cs-134 <1.55E-02 0.00E+00 1.55E-02 Cs-137 <1.67E-02 0.00E+00 1.67E-02 Be-7 <1.24E-01 0.00E+00 1.24E-01 K-40 2.53E-01 1.90E-01 1.99E-01 Sample ID: 350938 Sample Dates: 7/28/2014 - 8/4/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.88E-02 0.00E+00 1.88E-02 Cs-134 <1.30E-02 0.00E+00 1.30E-02 Cs-137 <2.29E-02 0.00E+00 2.29E-02 Be-7 <1.18E-01 0.00E+00 1.18E-01 K-40 6.09E-01 3.28E-01 3.79E-01 Sample ID: 351184 Sample Dates: 8/4/2014 - 8/11/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.84E-02 0.00E+00 1.84E-02 Cs-134 <1.05E-02 0.00E+00 1.05E-02 Cs-137 <2.14E-02 0.00E+00 2.14E-02 Be-7 <1.97E-01 0.00E+00 1.97E-01 K-40 <6.23E-01 0.00E+00 6.23E-01 Sample ID: 351623 Sample Dates: 8/11/2014 - 8/18/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.81E-02 0.00E+00 1.81E-02 Cs-134 <5.58E-03 0.00E+00 5.58E-03 Cs-137 <2.26E-02 0.00E+00 2.26E-02 Be-7 <1.72E-01 0.00E+00 1.72E-01 K-40 <6.03E-01 0.00E+00 6.03E-01 Sample ID: 353434 Sample Dates: 8/18/2014 - 8/25/2014 Nuclide Activity Sigma Error 1 LLD I-131 <3.07E-02 0.00E+00 3.07E-02 Cs-134 <2.60E-02 0.00E+00 2.60E-02 Cs-137 <1.94E-02 0.00E+00 1.94E-02 Be-7 6.48E-02 8.67E-02 1.42E-01 K-40 <5.52E-01 0.00E+00 5.52E-01 Sample ID: 354073 Sample Dates: 8/25/2014 - 9/2/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.05E-02 0.00E+00 2.05E-02 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 35 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 354073 Sample Dates: 8/25/2014 - 9/2/2014 Nuclide Activity Sigma Error 1 LLD Cs-134 <4.97E-03 0.00E+00 4.97E-03 Cs-137 <1.65E-02 0.00E+00 1.65E-02 Be-7 <1.28E-01 0.00E+00 1.28E-01 K-40 4.33E-01 2.33E-01 2.17E-01 Sample ID: 354453 Sample Dates: 9/2/2014 - 9/8/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.24E-02 0.00E+00 2.24E-02 Cs-134 <2.98E-02 0.00E+00 2.98E-02 Cs-137 <2.23E-02 0.00E+00 2.23E-02 Be-7 <1.96E-01 0.00E+00 1.96E-01 K-40 7.67E-01 3.34E-01 9.45E-02 Sample ID: 354769 Sample Dates: 9/8/2014 - 9/15/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.73E-02 0.00E+00 1.73E-02 Cs-134 <1.98E-02 0.00E+00 1.98E-02 Cs-137 <1.26E-02 0.00E+00 1.26E-02 Be-7 <1.18E-01 0.00E+00 1.18E-01 K-40 3.94E-01 2.19E-01 2.23E-01 Sample ID: 355180 Sample Dates: 9/15/2014 - 9/22/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.20E-02 0.00E+00 2.20E-02 Cs-134 <1.88E-02 0.00E+00 1.88E-02 Cs-137 <1.32E-02 0.00E+00 1.32E-02 Be-7 <1.35E-01 0.00E+00 1.35E-01 K-40 5.33E-01 3.14E-01 3.78E-01 Sample ID: 355647 Sample Dates: 9/22/2014 - 9/29/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.15E-02 0.00E+00 2.15E-02 Cs-134 <3.80E-03 0.00E+00 3.80E-03 Cs-137 <2.47E-02 0.00E+00 2.47E-02 Be-7 <8.09E-02 0.00E+00 8.09E-02 K-40 4.73E-01 3.16E-01 4.18E-01 Sample ID: 356513 Sample Dates: 9/29/2014 - 10/6/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.86E-02 0.00E+00 1.86E-02 Cs-134 <1.53E-02 0.00E+00 1.53E-02 Cs-137 <1.64E-02 0.00E+00 1.64E-02 Be-7 <1.05E-01 0.00E+00 1.05E-01 K-40 <7.17E-01 0.00E+00 7.17E-01 Sample ID: 357056 Sample Dates: 10/6/2014 - 10/13/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.82E-02 0.00E+00 1.82E-02 Cs-134 <1.84E-02 0.00E+00 1.84E-02 Cs-137 <2.47E-02 0.00E+00 2.47E-02 Be-7 <1.86E-01 0.00E+00 1.86E-01 K-40 4.39E-01 2.49E-01 2.36E-01 Sample ID: 358055 Sample Dates: 10/13/2014 - 10/20/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.51E-02 0.00E+00 2.51E-02 Cs-134 <1.87E-02 0.00E+00 1.87E-02 Cs-137 <2.33E-02 0.00E+00 2.33E-02 Be-7 <1.35E-01 0.00E+00 1.35E-01 K-40 4.80E-01 2.43E-01 8.12E-02 Sample ID: 358663 Sample Dates: 10/20/2014 - 10/27/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.15E-02 0.00E+00 2.15E-02 Cs-134 <1.30E-02 0.00E+00 1.30E-02 Cs-137 <1.88E-02 0.00E+00 1.89E-02 Be-7 <1.55E-01 0.00E+00 1.55E-01 K-40 2.07E-01 2.30E-01 3.56E-01 Sample ID: 359307 Sample Dates: 10/27/2014 - 11/3/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.65E-02 0.00E+00 1.65E-02 Cs-134 <1.86E-02 0.00E+00 1.86E-02 Cs-137 <1.91E-02 0.00E+00 1.91E-02 Be-7 <1.46E-01 0.00E+00 1.46E-01 K-40 <5.63E-01 0.00E+00 5.63E-01 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 36 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 360037 Sample Dates: 11/3/2014 - 11/10/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.36E-02 0.00E+00 2.36E-02 Cs-134 <1.42E-02 0.00E+00 1.42E-02 Cs-137 <1.00E-02 0.00E+00 1.00E-02 Be-7 <1.13E-01 0.00E+00 1.13E-01 K-40 6.92E-01 2.64E-01 6.47E-02 Sample ID: 360719 Sample Dates: 11/10/2014 - 11/17/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.81E-02 0.00E+00 2.81E-02 Cs-134 <1.33E-02 0.00E+00 1.33E-02 Cs-137 <2.34E-02 0.00E+00 2.34E-02 Be-7 <1.89E-01 0.00E+00 1.89E-01 K-40 2.40E-01 2.09E-01 2.80E-01 Sample ID: 361581 Sample Dates: 11/17/2014 - 11/24/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.42E-02 0.00E+00 1.42E-02 Cs-134 <1.70E-02 0.00E+00 1.70E-02 Cs-137 <2.12E-02 0.00E+00 2.12E-02 Be-7 <1.76E-01 0.00E+00 1.76E-01 K-40 <4.48E-01 0.00E+00 4.48E-01 Sample ID: 361960 Sample Dates: 11/24/2014 - 12/1/2014 Nuclide Activity Sigma Error 1 LLD I-131 <3.69E-02 0.00E+00 3.69E-02 Cs-134 <1.19E-02 0.00E+00 1.19E-02 Cs-137 <1.95E-02 0.00E+00 1.95E-02 Be-7 <1.69E-01 0.00E+00 1.69E-01 K-40 6.08E-01 2.48E-01 6.59E-02 Sample ID: 362790 Sample Dates: 12/1/2014 - 12/8/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.75E-02 0.00E+00 1.75E-02 Cs-134 <1.01E-02 0.00E+00 1.01E-02 Cs-137 <1.00E-02 0.00E+00 1.00E-02 Be-7 <1.14E-01 0.00E+00 1.14E-01 K-40 1.98E-01 2.14E-01 3.33E-01 Sample ID: 363530 Sample Dates: 12/8/2014 - 12/15/2014 Nuclide Activity Sigma Error 1 LLD I-131 <9.49E-03 0.00E+00 9.49E-03 Cs-134 <1.41E-02 0.00E+00 1.41E-02 Cs-137 <1.45E-02 0.00E+00 1.45E-02 Be-7 <7.84E-02 0.00E+00 7.84E-02 K-40 <3.76E-01 0.00E+00 3.76E-01 Sample ID: 363977 Sample Dates: 12/15/2014 - 12/22/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.79E-02 0.00E+00 1.79E-02 Cs-134 <1.32E-02 0.00E+00 1.32E-02 Cs-137 <1.54E-02 0.00E+00 1.54E-02 Be-7 <9.33E-02 0.00E+00 9.33E-02 K-40 4.92E-01 1.90E-01 4.76E-02 Sample ID: 364519 Sample Dates: 12/22/2014 - 12/29/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.10E-02 0.00E+00 1.10E-02 Cs-134 <1.35E-02 0.00E+00 1.35E-02 Cs-137 <9.28E-03 0.00E+00 9.28E-03 Be-7 <7.76E-02 0.00E+00 7.76E-02 K-40 3.73E-01 2.01E-01 2.60E-01 Sample Point 084 [ INDICATOR - NNE @ 2.58 miles ]

Sample ID: 280639 Sample Dates: 12/30/2013 - 1/6/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.77E-02 0.00E+00 2.77E-02 Cs-134 <2.03E-02 0.00E+00 2.03E-02 Cs-137 <1.86E-02 0.00E+00 1.86E-02 Be-7 <1.26E-01 0.00E+00 1.26E-01 K-40 <5.58E-01 0.00E+00 5.58E-01 Sample ID: 280812 Sample Dates: 1/6/2014 - 1/13/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.17E-02 0.00E+00 2.17E-02 Cs-134 <1.61E-02 0.00E+00 1.61E-02 Cs-137 <2.55E-02 0.00E+00 2.55E-02 Be-7 <1.51E-01 0.00E+00 1.51E-01 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 37 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 280812 Sample Dates: 1/6/2014 - 1/13/2014 Nuclide Activity Sigma Error 1 LLD K-40 4.06E-01 1.08E-01 2.63E-01 Sample ID: 281171 Sample Dates: 1/13/2014 - 1/20/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.20E-02 0.00E+00 2.20E-02 Cs-134 <1.07E-02 0.00E+00 1.07E-02 Cs-137 <1.38E-02 0.00E+00 1.38E-02 Be-7 <1.35E-01 0.00E+00 1.35E-01 K-40 4.08E-01 1.21E-01 2.76E-01 Sample ID: 281492 Sample Dates: 1/20/2014 - 1/27/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.12E-02 0.00E+00 1.12E-02 Cs-134 <9.64E-03 0.00E+00 9.64E-03 Cs-137 <1.12E-02 0.00E+00 1.12E-02 Be-7 <8.40E-02 0.00E+00 8.40E-02 K-40 2.33E-01 6.73E-02 5.26E-02 Sample ID: 282115 Sample Dates: 1/27/2014 - 2/3/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.93E-02 0.00E+00 1.93E-02 Cs-134 <1.39E-02 0.00E+00 1.39E-02 Cs-137 <1.75E-02 0.00E+00 1.75E-02 Be-7 <1.16E-01 0.00E+00 1.16E-01 K-40 7.05E-01 1.29E-01 1.69E-01 Sample ID: 282927 Sample Dates: 2/3/2014 - 2/10/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.08E-02 0.00E+00 1.08E-02 Cs-134 <1.22E-02 0.00E+00 1.22E-02 Cs-137 <9.84E-03 0.00E+00 9.84E-03 Be-7 <1.03E-01 0.00E+00 1.03E-01 K-40 4.35E-01 9.28E-02 5.35E-02 Sample ID: 283374 Sample Dates: 2/10/2014 - 2/17/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.66E-02 0.00E+00 1.66E-02 Cs-134 <4.29E-03 0.00E+00 4.29E-03 Cs-137 <1.73E-02 0.00E+00 1.73E-02 Be-7 <5.57E-02 0.00E+00 5.57E-02 K-40 2.37E-01 8.90E-02 5.22E-02 Sample ID: 284541 Sample Dates: 2/17/2014 - 2/24/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.28E-02 0.00E+00 1.28E-02 Cs-134 <1.29E-02 0.00E+00 1.29E-02 Cs-137 <1.08E-02 0.00E+00 1.08E-02 Be-7 <1.13E-01 0.00E+00 1.13E-01 K-40 3.90E-01 9.18E-02 2.63E-01 Sample ID: 285102 Sample Dates: 2/24/2014 - 3/3/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.56E-02 0.00E+00 1.56E-02 Cs-134 <1.39E-02 0.00E+00 1.39E-02 Cs-137 <9.32E-03 0.00E+00 9.32E-03 Be-7 <1.41E-01 0.00E+00 1.41E-01 K-40 4.19E-01 1.18E-01 2.54E-01 Sample ID: 285707 Sample Dates: 3/3/2014 - 3/10/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.52E-02 0.00E+00 2.52E-02 Cs-134 <1.97E-02 0.00E+00 1.97E-02 Cs-137 <2.54E-02 0.00E+00 2.54E-02 Be-7 <1.75E-01 0.00E+00 1.75E-01 K-40 3.63E-01 1.88E-01 3.38E-01 Sample ID: 286211 Sample Dates: 3/10/2014 - 3/17/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.50E-02 0.00E+00 2.50E-02 Cs-134 <1.62E-02 0.00E+00 1.62E-02 Cs-137 <1.91E-02 0.00E+00 1.91E-02 Be-7 <1.62E-01 0.00E+00 1.62E-01 K-40 4.89E-01 1.18E-01 2.06E-01 Sample ID: 287096 Sample Dates: 3/17/2014 - 3/24/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.20E-02 0.00E+00 1.20E-02 Cs-134 <1.34E-02 0.00E+00 1.34E-02 Cs-137 <1.08E-02 0.00E+00 1.08E-02 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 38 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 287096 Sample Dates: 3/17/2014 - 3/24/2014 Nuclide Activity Sigma Error 1 LLD Be-7 <6.63E-02 0.00E+00 6.63E-02 K-40 2.35E-01 9.91E-02 5.26E-02 Sample ID: 288347 Sample Dates: 3/24/2014 - 3/31/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.54E-02 0.00E+00 2.54E-02 Cs-134 <1.71E-02 0.00E+00 1.71E-02 Cs-137 <2.30E-02 0.00E+00 2.30E-02 Be-7 <1.70E-01 0.00E+00 1.70E-01 K-40 6.17E-01 1.32E-01 2.63E-01 Sample ID: 289071 Sample Dates: 3/31/2014 - 4/7/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.17E-02 0.00E+00 2.17E-02 Cs-134 <1.46E-02 0.00E+00 1.46E-02 Cs-137 <2.46E-02 0.00E+00 2.46E-02 Be-7 <1.56E-01 0.00E+00 1.56E-01 K-40 3.82E-01 1.27E-01 2.78E-01 Sample ID: 289457 Sample Dates: 4/7/2014 - 4/14/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.94E-02 0.00E+00 1.94E-02 Cs-134 <1.46E-02 0.00E+00 1.46E-02 Cs-137 <1.65E-02 0.00E+00 1.65E-02 Be-7 <8.40E-02 0.00E+00 8.40E-02 K-40 5.90E-01 1.18E-01 6.38E-02 Sample ID: 289867 Sample Dates: 4/14/2014 - 4/21/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.89E-02 0.00E+00 1.89E-02 Cs-134 <1.93E-02 0.00E+00 1.93E-02 Cs-137 <1.23E-02 0.00E+00 1.23E-02 Be-7 <1.36E-01 0.00E+00 1.36E-01 K-40 4.89E-01 1.18E-01 2.75E-01 Sample ID: 291472 Sample Dates: 4/21/2014 - 4/28/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.51E-02 0.00E+00 2.51E-02 Cs-134 <1.72E-02 0.00E+00 1.72E-02 Cs-137 <2.21E-02 0.00E+00 2.21E-02 Be-7 <1.23E-01 0.00E+00 1.23E-01 K-40 <6.30E-01 0.00E+00 6.30E-01 Sample ID: 292766 Sample Dates: 4/28/2014 - 5/5/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.51E-02 0.00E+00 1.51E-02 Cs-134 <1.08E-02 0.00E+00 1.08E-02 Cs-137 <1.04E-02 0.00E+00 1.04E-02 Be-7 <8.19E-02 0.00E+00 8.19E-02 K-40 4.17E-01 9.10E-02 2.21E-01 Sample ID: 293028 Sample Dates: 5/5/2014 - 5/12/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.15E-02 0.00E+00 1.15E-02 Cs-134 <1.14E-02 0.00E+00 1.14E-02 Cs-137 <1.05E-02 0.00E+00 1.05E-02 Be-7 <6.47E-02 0.00E+00 6.47E-02 K-40 3.64E-01 8.34E-02 1.38E-01 Sample ID: 294659 Sample Dates: 5/12/2014 - 5/19/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.30E-02 0.00E+00 2.30E-02 Cs-134 <1.45E-02 0.00E+00 1.45E-02 Cs-137 <2.28E-02 0.00E+00 2.28E-02 Be-7 <1.38E-01 0.00E+00 1.38E-01 K-40 <5.80E-01 0.00E+00 5.80E-01 Sample ID: 295168 Sample Dates: 5/19/2014 - 5/27/2014 Nuclide Activity Sigma Error 1 LLD I-131 <3.82E-02 0.00E+00 3.82E-02 Cs-134 <1.29E-02 0.00E+00 1.29E-02 Cs-137 <1.98E-02 0.00E+00 1.98E-02 Be-7 <1.36E-01 0.00E+00 1.36E-01 K-40 <5.09E-01 0.00E+00 5.09E-01 Sample ID: 295429 Sample Dates: 5/27/2014 - 6/2/2014 Nuclide Activity Sigma Error 1 LLD I-131 <3.37E-02 0.00E+00 3.37E-02 Cs-134 <2.24E-02 0.00E+00 2.24E-02 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 39 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 295429 Sample Dates: 5/27/2014 - 6/2/2014 Nuclide Activity Sigma Error 1 LLD Cs-137 <2.14E-02 0.00E+00 2.14E-02 Be-7 <1.62E-01 0.00E+00 1.62E-01 K-40 4.64E-01 1.61E-01 3.19E-01 Sample ID: 295944 Sample Dates: 6/2/2014 - 6/9/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.98E-02 0.00E+00 1.98E-02 Cs-134 <1.23E-02 0.00E+00 1.23E-02 Cs-137 <2.25E-02 0.00E+00 2.25E-02 Be-7 <1.57E-01 0.00E+00 1.57E-01 K-40 3.94E-01 1.34E-01 2.50E-01 Sample ID: 296189 Sample Dates: 6/9/2014 - 6/16/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.94E-02 0.00E+00 1.94E-02 Cs-134 <1.55E-02 0.00E+00 1.55E-02 Cs-137 <1.30E-02 0.00E+00 1.30E-02 Be-7 <1.02E-01 0.00E+00 1.02E-01 K-40 6.77E-01 1.28E-01 2.09E-01 Sample ID: 296710 Sample Dates: 6/16/2014 - 6/23/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.36E-02 0.00E+00 2.36E-02 Cs-134 <1.83E-02 0.00E+00 1.83E-02 Cs-137 <1.75E-02 0.00E+00 1.75E-02 Be-7 <1.68E-01 0.00E+00 1.68E-01 K-40 4.19E-01 1.31E-01 2.54E-01 Sample ID: 296937 Sample Dates: 6/23/2014 - 6/30/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.62E-02 0.00E+00 1.62E-02 Cs-134 <1.20E-02 0.00E+00 1.20E-02 Cs-137 <1.55E-02 0.00E+00 1.55E-02 Be-7 <7.59E-02 0.00E+00 7.59E-02 K-40 4.77E-01 9.75E-02 2.33E-01 Sample ID: 297334 Sample Dates: 6/30/2014 - 7/7/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.05E-02 0.00E+00 2.05E-02 Cs-134 <1.98E-02 0.00E+00 1.98E-02 Cs-137 <1.98E-02 0.00E+00 1.98E-02 Be-7 <1.66E-01 0.00E+00 1.66E-01 K-40 4.75E-01 1.57E-01 3.08E-01 Sample ID: 297622 Sample Dates: 7/7/2014 - 7/14/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.39E-02 0.00E+00 2.39E-02 Cs-134 <1.58E-02 0.00E+00 1.58E-02 Cs-137 <1.50E-02 0.00E+00 1.50E-02 Be-7 <1.16E-01 0.00E+00 1.16E-01 K-40 2.74E-01 2.21E-01 3.07E-01 Sample ID: 298158 Sample Dates: 7/14/2014 - 7/21/2014 Nuclide Activity Sigma Error 1 LLD I-131 <3.25E-02 0.00E+00 3.25E-02 Cs-134 <1.02E-02 0.00E+00 1.02E-02 Cs-137 <1.60E-02 0.00E+00 1.60E-02 Be-7 <1.44E-01 0.00E+00 1.44E-01 K-40 5.54E-01 2.69E-01 2.05E-01 Sample ID: 350198 Sample Dates: 7/21/2014 - 7/28/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.34E-02 0.00E+00 1.34E-02 Cs-134 <1.34E-02 0.00E+00 1.34E-02 Cs-137 <1.67E-02 0.00E+00 1.67E-02 Be-7 <1.07E-01 0.00E+00 1.07E-01 K-40 <6.83E-01 0.00E+00 6.83E-01 Sample ID: 350939 Sample Dates: 7/28/2014 - 8/4/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.71E-02 0.00E+00 2.71E-02 Cs-134 <1.83E-02 0.00E+00 1.83E-02 Cs-137 <1.28E-02 0.00E+00 1.28E-02 Be-7 <1.02E-01 0.00E+00 1.02E-01 K-40 2.51E-01 2.09E-01 2.71E-01 Sample ID: 351185 Sample Dates: 8/4/2014 - 8/11/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.57E-02 0.00E+00 2.57E-02 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 40 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 351185 Sample Dates: 8/4/2014 - 8/11/2014 Nuclide Activity Sigma Error 1 LLD Cs-134 <1.54E-02 0.00E+00 1.54E-02 Cs-137 <1.66E-02 0.00E+00 1.66E-02 Be-7 <1.05E-01 0.00E+00 1.05E-01 K-40 4.31E-01 2.91E-01 3.73E-01 Sample ID: 351624 Sample Dates: 8/11/2014 - 8/18/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.39E-02 0.00E+00 2.39E-02 Cs-134 <2.48E-02 0.00E+00 2.48E-02 Cs-137 <1.60E-02 0.00E+00 1.60E-02 Be-7 <1.30E-01 0.00E+00 1.30E-01 K-40 <6.19E-01 0.00E+00 6.19E-01 Sample ID: 353435 Sample Dates: 8/18/2014 - 8/25/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.69E-02 0.00E+00 2.69E-02 Cs-134 <5.87E-03 0.00E+00 5.87E-03 Cs-137 <4.90E-03 0.00E+00 4.90E-03 Be-7 <1.38E-01 0.00E+00 1.38E-01 K-40 4.26E-01 2.68E-01 3.06E-01 Sample ID: 354075 Sample Dates: 8/25/2014 - 9/2/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.04E-02 0.00E+00 2.04E-02 Cs-134 <1.35E-02 0.00E+00 1.35E-02 Cs-137 <1.65E-02 0.00E+00 1.65E-02 Be-7 <1.17E-01 0.00E+00 1.17E-01 K-40 3.55E-01 2.56E-01 3.46E-01 Sample ID: 354454 Sample Dates: 9/2/2014 - 9/8/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.01E-02 0.00E+00 2.01E-02 Cs-134 <2.30E-02 0.00E+00 2.30E-02 Cs-137 <1.52E-02 0.00E+00 1.52E-02 Be-7 <1.71E-01 0.00E+00 1.71E-01 K-40 <7.03E-01 0.00E+00 7.03E-01 Sample ID: 354770 Sample Dates: 9/8/2014 - 9/15/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.24E-02 0.00E+00 1.24E-02 Cs-134 <1.53E-02 0.00E+00 1.53E-02 Cs-137 <3.67E-03 0.00E+00 3.67E-03 Be-7 <7.77E-02 0.00E+00 7.77E-02 K-40 <5.48E-01 0.00E+00 5.48E-01 Sample ID: 355182 Sample Dates: 9/15/2014 - 9/22/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.48E-02 0.00E+00 2.48E-02 Cs-134 <1.54E-02 0.00E+00 1.54E-02 Cs-137 <1.93E-02 0.00E+00 1.93E-02 Be-7 <1.35E-01 0.00E+00 1.35E-01 K-40 4.79E-01 3.33E-01 4.55E-01 Sample ID: 355648 Sample Dates: 9/22/2014 - 9/29/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.28E-02 0.00E+00 2.28E-02 Cs-134 <1.03E-02 0.00E+00 1.03E-02 Cs-137 <1.29E-02 0.00E+00 1.29E-02 Be-7 <1.32E-01 0.00E+00 1.32E-01 K-40 5.05E-01 2.87E-01 3.17E-01 Sample ID: 356515 Sample Dates: 9/29/2014 - 10/6/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.26E-02 0.00E+00 2.26E-02 Cs-134 <2.00E-02 0.00E+00 2.00E-02 Cs-137 <1.64E-02 0.00E+00 1.64E-02 Be-7 <1.05E-01 0.00E+00 1.05E-01 K-40 5.17E-01 2.82E-01 2.91E-01 Sample ID: 357057 Sample Dates: 10/6/2014 - 10/13/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.32E-02 0.00E+00 2.32E-02 Cs-134 <1.48E-02 0.00E+00 1.48E-02 Cs-137 <2.06E-02 0.00E+00 2.06E-02 Be-7 <1.54E-01 0.00E+00 1.54E-01 K-40 <5.26E-01 0.00E+00 5.26E-01 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 41 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 358056 Sample Dates: 10/13/2014 - 10/20/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.03E-02 0.00E+00 2.03E-02 Cs-134 <2.05E-02 0.00E+00 2.05E-02 Cs-137 <1.33E-02 0.00E+00 1.33E-02 Be-7 <1.24E-01 0.00E+00 1.24E-01 K-40 4.48E-01 3.01E-01 3.87E-01 Sample ID: 358664 Sample Dates: 10/20/2014 - 10/27/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.41E-02 0.00E+00 1.41E-02 Cs-134 <1.03E-02 0.00E+00 1.03E-02 Cs-137 <2.29E-02 0.00E+00 2.29E-02 Be-7 <1.65E-01 0.00E+00 1.65E-01 K-40 <5.56E-01 0.00E+00 5.56E-01 Sample ID: 359309 Sample Dates: 10/27/2014 - 11/3/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.84E-02 0.00E+00 1.84E-02 Cs-134 <1.71E-02 0.00E+00 1.71E-02 Cs-137 <1.31E-02 0.00E+00 1.31E-02 Be-7 <1.46E-01 0.00E+00 1.46E-01 K-40 3.29E-01 2.34E-01 2.78E-01 Sample ID: 360038 Sample Dates: 11/3/2014 - 11/10/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.27E-02 0.00E+00 2.27E-02 Cs-134 <1.01E-02 0.00E+00 1.01E-02 Cs-137 <1.00E-02 0.00E+00 1.00E-02 Be-7 <8.00E-02 0.00E+00 8.00E-02 K-40 5.51E-01 2.34E-01 6.49E-02 Sample ID: 360720 Sample Dates: 11/10/2014 - 11/17/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.56E-02 0.00E+00 1.56E-02 Cs-134 <1.87E-02 0.00E+00 1.87E-02 Cs-137 <1.65E-02 0.00E+00 1.65E-02 Be-7 <1.35E-01 0.00E+00 1.35E-01 K-40 5.92E-01 3.25E-01 3.76E-01 Sample ID: 361582 Sample Dates: 11/17/2014 - 11/24/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.84E-02 0.00E+00 1.84E-02 Cs-134 <1.70E-02 0.00E+00 1.70E-02 Cs-137 <2.13E-02 0.00E+00 2.13E-02 Be-7 <1.67E-01 0.00E+00 1.67E-01 K-40 2.68E-01 1.80E-01 8.08E-02 Sample ID: 361961 Sample Dates: 11/24/2014 - 12/1/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.98E-02 0.00E+00 2.98E-02 Cs-134 <1.33E-02 0.00E+00 1.33E-02 Cs-137 <1.28E-02 0.00E+00 1.28E-02 Be-7 <8.65E-02 0.00E+00 8.65E-02 K-40 4.37E-01 2.09E-01 6.58E-02 Sample ID: 362791 Sample Dates: 12/1/2014 - 12/8/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.87E-02 0.00E+00 2.87E-02 Cs-134 <1.47E-02 0.00E+00 1.47E-02 Cs-137 <1.84E-02 0.00E+00 1.84E-02 Be-7 <1.56E-01 0.00E+00 1.56E-01 K-40 <5.95E-01 0.00E+00 5.95E-01 Sample ID: 363531 Sample Dates: 12/8/2014 - 12/15/2014 Nuclide Activity Sigma Error 1 LLD I-131 <8.52E-03 0.00E+00 8.52E-03 Cs-134 <8.43E-03 0.00E+00 8.43E-03 Cs-137 <1.39E-02 0.00E+00 1.39E-02 Be-7 <8.38E-02 0.00E+00 8.38E-02 K-40 5.07E-01 2.17E-01 2.45E-01 Sample ID: 363978 Sample Dates: 12/15/2014 - 12/22/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.63E-02 0.00E+00 1.63E-02 Cs-134 <1.53E-02 0.00E+00 1.53E-02 Cs-137 <1.31E-02 0.00E+00 1.31E-02 Be-7 <8.54E-02 0.00E+00 8.54E-02 K-40 5.80E-01 2.08E-01 4.76E-02 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 42 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 364520 Sample Dates: 12/22/2014 - 12/29/2014 Nuclide Activity Sigma Error 1 LLD I-131 <7.10E-03 0.00E+00 7.10E-03 Cs-134 <7.39E-03 0.00E+00 7.39E-03 Cs-137 <8.68E-03 0.00E+00 8.68E-03 Be-7 <5.71E-02 0.00E+00 5.71E-02 K-40 3.82E-01 1.34E-01 1.44E-01 Sample Point 085 [ INDICATOR - NNW @ 0.88 miles ]

Sample ID: 280658 Sample Dates: 12/30/2013 - 1/6/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.48E-02 0.00E+00 2.48E-02 Cs-134 <1.58E-02 0.00E+00 1.58E-02 Cs-137 <1.44E-02 0.00E+00 1.44E-02 Be-7 <1.29E-01 0.00E+00 1.29E-01 K-40 3.67E-01 1.02E-01 2.68E-01 Sample ID: 280831 Sample Dates: 1/6/2014 - 1/13/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.24E-02 0.00E+00 2.24E-02 Cs-134 <8.86E-03 0.00E+00 8.86E-03 Cs-137 <2.12E-02 0.00E+00 2.12E-02 Be-7 <1.45E-01 0.00E+00 1.45E-01 K-40 4.16E-01 1.42E-01 4.34E-01 Sample ID: 281190 Sample Dates: 1/13/2014 - 1/20/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.78E-02 0.00E+00 1.78E-02 Cs-134 <1.25E-02 0.00E+00 1.25E-02 Cs-137 <8.98E-03 0.00E+00 8.98E-03 Be-7 <7.33E-02 0.00E+00 7.33E-02 K-40 4.62E-01 1.23E-01 6.40E-02 Sample ID: 281511 Sample Dates: 1/20/2014 - 1/27/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.08E-02 0.00E+00 1.08E-02 Cs-134 <7.45E-03 0.00E+00 7.45E-03 Cs-137 <1.17E-02 0.00E+00 1.17E-02 Be-7 <6.62E-02 0.00E+00 6.62E-02 K-40 4.77E-01 7.54E-02 8.67E-02 Sample ID: 282134 Sample Dates: 1/27/2014 - 2/3/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.43E-02 0.00E+00 2.43E-02 Cs-134 <1.62E-02 0.00E+00 1.62E-02 Cs-137 <1.55E-02 0.00E+00 1.55E-02 Be-7 <1.58E-01 0.00E+00 1.58E-01 K-40 3.65E-01 1.01E-01 2.97E-01 Sample ID: 282946 Sample Dates: 2/3/2014 - 2/10/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.17E-02 0.00E+00 1.17E-02 Cs-134 <7.62E-03 0.00E+00 7.62E-03 Cs-137 <9.28E-03 0.00E+00 9.28E-03 Be-7 <6.36E-02 0.00E+00 6.36E-02 K-40 5.34E-01 8.05E-02 1.47E-01 Sample ID: 283393 Sample Dates: 2/10/2014 - 2/17/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.38E-02 0.00E+00 1.38E-02 Cs-134 <1.01E-02 0.00E+00 1.01E-02 Cs-137 <1.48E-02 0.00E+00 1.48E-02 Be-7 <7.06E-02 0.00E+00 7.06E-02 K-40 4.07E-01 9.34E-02 5.79E-02 Sample ID: 284560 Sample Dates: 2/17/2014 - 2/24/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.45E-02 0.00E+00 1.45E-02 Cs-134 <6.60E-03 0.00E+00 6.60E-03 Cs-137 <1.25E-02 0.00E+00 1.25E-02 Be-7 <9.54E-02 0.00E+00 9.54E-02 K-40 <4.21E-01 0.00E+00 4.21E-01 Sample ID: 285121 Sample Dates: 2/24/2014 - 3/3/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.90E-02 0.00E+00 1.90E-02 Cs-134 <1.88E-02 0.00E+00 1.88E-02 Cs-137 <1.23E-02 0.00E+00 1.23E-02 Be-7 <1.34E-01 0.00E+00 1.34E-01 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 43 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 285121 Sample Dates: 2/24/2014 - 3/3/2014 Nuclide Activity Sigma Error 1 LLD K-40 4.51E-01 1.13E-01 7.62E-02 Sample ID: 285726 Sample Dates: 3/3/2014 - 3/10/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.03E-02 0.00E+00 1.03E-02 Cs-134 <1.16E-02 0.00E+00 1.16E-02 Cs-137 <9.45E-03 0.00E+00 9.45E-03 Be-7 <9.01E-02 0.00E+00 9.01E-02 K-40 2.83E-01 1.16E-01 1.70E-01 Sample ID: 286230 Sample Dates: 3/10/2014 - 3/17/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.77E-02 0.00E+00 1.77E-02 Cs-134 <1.40E-02 0.00E+00 1.40E-02 Cs-137 <2.11E-02 0.00E+00 2.11E-02 Be-7 <1.31E-01 0.00E+00 1.31E-01 K-40 <6.60E-01 0.00E+00 6.60E-01 Sample ID: 287115 Sample Dates: 3/17/2014 - 3/24/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.26E-02 0.00E+00 2.26E-02 Cs-134 <1.79E-02 0.00E+00 1.79E-02 Cs-137 <2.34E-02 0.00E+00 2.34E-02 Be-7 <1.99E-01 0.00E+00 1.99E-01 K-40 5.48E-01 1.55E-01 2.59E-01 Sample ID: 288366 Sample Dates: 3/24/2014 - 3/31/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.56E-02 0.00E+00 1.56E-02 Cs-134 <1.28E-02 0.00E+00 1.28E-02 Cs-137 <3.53E-03 0.00E+00 3.53E-03 Be-7 <7.46E-02 0.00E+00 7.46E-02 K-40 <4.57E-01 0.00E+00 4.57E-01 Sample ID: 289090 Sample Dates: 3/31/2014 - 4/7/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.72E-02 0.00E+00 2.72E-02 Cs-134 <2.30E-02 0.00E+00 2.30E-02 Cs-137 <2.39E-02 0.00E+00 2.39E-02 Be-7 <1.40E-01 0.00E+00 1.40E-01 K-40 4.12E-01 1.10E-01 3.26E-01 Sample ID: 289476 Sample Dates: 4/7/2014 - 4/14/2014 Nuclide Activity Sigma Error 1 LLD I-131 <6.93E-03 0.00E+00 6.93E-03 Cs-134 <8.84E-03 0.00E+00 8.84E-03 Cs-137 <1.41E-02 0.00E+00 1.41E-02 Be-7 <7.25E-02 0.00E+00 7.25E-02 K-40 5.66E-01 8.84E-02 1.21E-01 Sample ID: 289886 Sample Dates: 4/14/2014 - 4/21/2014 Nuclide Activity Sigma Error 1 LLD I-131 <9.28E-03 0.00E+00 9.28E-03 Cs-134 <1.34E-02 0.00E+00 1.34E-02 Cs-137 <1.64E-02 0.00E+00 1.64E-02 Be-7 <1.09E-01 0.00E+00 1.09E-01 K-40 4.13E-01 9.49E-02 5.88E-02 Sample ID: 291491 Sample Dates: 4/21/2014 - 4/28/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.83E-02 0.00E+00 2.83E-02 Cs-134 <1.73E-02 0.00E+00 1.73E-02 Cs-137 <1.53E-02 0.00E+00 1.53E-02 Be-7 <1.56E-01 0.00E+00 1.56E-01 K-40 5.09E-01 1.20E-01 3.12E-01 Sample ID: 292785 Sample Dates: 4/28/2014 - 5/5/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.09E-02 0.00E+00 1.09E-02 Cs-134 <1.30E-02 0.00E+00 1.30E-02 Cs-137 <1.34E-02 0.00E+00 1.34E-02 Be-7 <7.21E-02 0.00E+00 7.21E-02 K-40 5.06E-01 8.44E-02 1.59E-01 Sample ID: 293047 Sample Dates: 5/5/2014 - 5/12/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.48E-02 0.00E+00 1.48E-02 Cs-134 <1.05E-02 0.00E+00 1.05E-02 Cs-137 <1.15E-02 0.00E+00 1.15E-02 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 44 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 293047 Sample Dates: 5/5/2014 - 5/12/2014 Nuclide Activity Sigma Error 1 LLD Be-7 <7.88E-02 0.00E+00 7.88E-02 K-40 3.83E-01 8.76E-02 1.18E-01 Sample ID: 294678 Sample Dates: 5/12/2014 - 5/19/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.06E-02 0.00E+00 2.06E-02 Cs-134 <1.90E-02 0.00E+00 1.90E-02 Cs-137 <1.90E-02 0.00E+00 1.90E-02 Be-7 <2.01E-01 0.00E+00 2.01E-01 K-40 5.79E-01 1.30E-01 2.70E-01 Sample ID: 295187 Sample Dates: 5/19/2014 - 5/27/2014 Nuclide Activity Sigma Error 1 LLD I-131 <4.19E-02 0.00E+00 4.19E-02 Cs-134 <1.55E-02 0.00E+00 1.55E-02 Cs-137 <2.02E-02 0.00E+00 2.02E-02 Be-7 <1.52E-01 0.00E+00 1.52E-01 K-40 3.84E-01 1.18E-01 2.87E-01 Sample ID: 295448 Sample Dates: 5/27/2014 - 6/2/2014 Nuclide Activity Sigma Error 1 LLD I-131 <3.22E-02 0.00E+00 3.22E-02 Cs-134 <1.74E-02 0.00E+00 1.74E-02 Cs-137 <2.65E-02 0.00E+00 2.65E-02 Be-7 <1.96E-01 0.00E+00 1.96E-01 K-40 <6.67E-01 0.00E+00 6.67E-01 Sample ID: 295963 Sample Dates: 6/2/2014 - 6/9/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.07E-02 0.00E+00 2.07E-02 Cs-134 <1.22E-02 0.00E+00 1.22E-02 Cs-137 <2.03E-02 0.00E+00 2.03E-02 Be-7 <1.59E-01 0.00E+00 1.59E-01 K-40 3.40E-01 9.80E-02 2.11E-01 Sample ID: 296208 Sample Dates: 6/9/2014 - 6/16/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.16E-02 0.00E+00 1.16E-02 Cs-134 <9.46E-03 0.00E+00 9.46E-03 Cs-137 <1.58E-02 0.00E+00 1.58E-02 Be-7 <7.62E-02 0.00E+00 7.62E-02 K-40 4.04E-01 7.51E-02 1.25E-01 Sample ID: 296729 Sample Dates: 6/16/2014 - 6/23/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.92E-02 0.00E+00 2.92E-02 Cs-134 <1.55E-02 0.00E+00 1.55E-02 Cs-137 <1.51E-02 0.00E+00 1.51E-02 Be-7 <1.44E-01 0.00E+00 1.44E-01 K-40 4.75E-01 1.15E-01 3.29E-01 Sample ID: 296956 Sample Dates: 6/23/2014 - 6/30/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.94E-02 0.00E+00 1.94E-02 Cs-134 <1.58E-02 0.00E+00 1.58E-02 Cs-137 <1.37E-02 0.00E+00 1.37E-02 Be-7 <8.32E-02 0.00E+00 8.32E-02 K-40 6.61E-01 1.45E-01 2.03E-01 Sample ID: 297353 Sample Dates: 6/30/2014 - 7/7/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.61E-02 0.00E+00 1.61E-02 Cs-134 <1.15E-02 0.00E+00 1.15E-02 Cs-137 <1.59E-02 0.00E+00 1.59E-02 Be-7 <1.01E-01 0.00E+00 1.01E-01 K-40 3.30E-01 1.05E-01 1.76E-01 Sample ID: 297641 Sample Dates: 7/7/2014 - 7/14/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.85E-02 0.00E+00 1.85E-02 Cs-134 <6.49E-03 0.00E+00 6.49E-03 Cs-137 <1.44E-02 0.00E+00 1.44E-02 Be-7 <7.45E-02 0.00E+00 7.45E-02 K-40 <3.80E-01 0.00E+00 3.80E-01 Sample ID: 298177 Sample Dates: 7/14/2014 - 7/21/2014 Nuclide Activity Sigma Error 1 LLD I-131 <4.54E-02 0.00E+00 4.54E-02 Cs-134 <1.67E-02 0.00E+00 1.67E-02 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 45 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 298177 Sample Dates: 7/14/2014 - 7/21/2014 Nuclide Activity Sigma Error 1 LLD Cs-137 <1.60E-02 0.00E+00 1.60E-02 Be-7 <1.29E-01 0.00E+00 1.29E-01 K-40 5.66E-01 2.84E-01 2.64E-01 Sample ID: 350199 Sample Dates: 7/21/2014 - 7/28/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.95E-02 0.00E+00 1.95E-02 Cs-134 <1.06E-02 0.00E+00 1.06E-02 Cs-137 <1.93E-02 0.00E+00 1.93E-02 Be-7 <1.83E-01 0.00E+00 1.83E-01 K-40 <6.64E-01 0.00E+00 6.64E-01 Sample ID: 350940 Sample Dates: 7/28/2014 - 8/4/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.20E-02 0.00E+00 2.20E-02 Cs-134 <1.51E-02 0.00E+00 1.51E-02 Cs-137 <1.62E-02 0.00E+00 1.62E-02 Be-7 <1.18E-01 0.00E+00 1.18E-01 K-40 <5.94E-01 0.00E+00 5.94E-01 Sample ID: 351186 Sample Dates: 8/4/2014 - 8/11/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.24E-02 0.00E+00 2.24E-02 Cs-134 <1.72E-02 0.00E+00 1.72E-02 Cs-137 <1.66E-02 0.00E+00 1.66E-02 Be-7 <1.36E-01 0.00E+00 1.36E-01 K-40 2.18E-01 1.80E-01 2.06E-01 Sample ID: 351625 Sample Dates: 8/11/2014 - 8/18/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.26E-02 0.00E+00 2.26E-02 Cs-134 <2.22E-02 0.00E+00 2.22E-02 Cs-137 <1.27E-02 0.00E+00 1.27E-02 Be-7 <1.16E-01 0.00E+00 1.16E-01 K-40 3.29E-01 2.45E-01 3.18E-01 Sample ID: 353436 Sample Dates: 8/18/2014 - 8/25/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.68E-02 0.00E+00 2.68E-02 Cs-134 <1.59E-02 0.00E+00 1.59E-02 Cs-137 <2.36E-02 0.00E+00 2.36E-02 Be-7 <1.06E-01 0.00E+00 1.06E-01 K-40 <6.83E-01 0.00E+00 6.83E-01 Sample ID: 354077 Sample Dates: 8/25/2014 - 9/2/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.04E-02 0.00E+00 2.04E-02 Cs-134 <2.20E-02 0.00E+00 2.20E-02 Cs-137 <4.15E-03 0.00E+00 4.15E-03 Be-7 <1.17E-01 0.00E+00 1.17E-01 K-40 <5.66E-01 0.00E+00 5.66E-01 Sample ID: 354455 Sample Dates: 9/2/2014 - 9/8/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.79E-02 0.00E+00 2.79E-02 Cs-134 <2.67E-02 0.00E+00 2.67E-02 Cs-137 <5.61E-03 0.00E+00 5.61E-03 Be-7 <1.21E-01 0.00E+00 1.21E-01 K-40 8.50E-01 3.82E-01 3.41E-01 Sample ID: 354771 Sample Dates: 9/8/2014 - 9/15/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.95E-02 0.00E+00 1.95E-02 Cs-134 <2.22E-02 0.00E+00 2.22E-02 Cs-137 <2.01E-02 0.00E+00 2.01E-02 Be-7 <1.02E-01 0.00E+00 1.02E-01 K-40 4.59E-01 3.17E-01 4.41E-01 Sample ID: 355184 Sample Dates: 9/15/2014 - 9/22/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.20E-02 0.00E+00 2.20E-02 Cs-134 <1.88E-02 0.00E+00 1.88E-02 Cs-137 <4.84E-03 0.00E+00 4.84E-03 Be-7 <3.04E-02 0.00E+00 3.04E-02 K-40 7.63E-01 3.49E-01 3.44E-01 Sample ID: 355649 Sample Dates: 9/22/2014 - 9/29/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.28E-02 0.00E+00 2.28E-02 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 46 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 355649 Sample Dates: 9/22/2014 - 9/29/2014 Nuclide Activity Sigma Error 1 LLD Cs-134 <1.98E-02 0.00E+00 1.98E-02 Cs-137 <1.89E-02 0.00E+00 1.89E-02 Be-7 <1.32E-01 0.00E+00 1.32E-01 K-40 5.23E-01 3.33E-01 4.38E-01 Sample ID: 356518 Sample Dates: 9/29/2014 - 10/6/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.84E-02 0.00E+00 2.84E-02 Cs-134 <1.03E-02 0.00E+00 1.03E-02 Cs-137 <1.63E-02 0.00E+00 1.63E-02 Be-7 <1.04E-01 0.00E+00 1.04E-01 K-40 6.62E-01 3.10E-01 2.79E-01 Sample ID: 357058 Sample Dates: 10/6/2014 - 10/13/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.80E-02 0.00E+00 1.80E-02 Cs-134 <1.68E-02 0.00E+00 1.68E-02 Cs-137 <1.29E-02 0.00E+00 1.29E-02 Be-7 <1.67E-01 0.00E+00 1.67E-01 K-40 3.81E-01 2.33E-01 2.31E-01 Sample ID: 358057 Sample Dates: 10/13/2014 - 10/20/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.79E-02 0.00E+00 2.79E-02 Cs-134 <1.55E-02 0.00E+00 1.55E-02 Cs-137 <1.93E-02 0.00E+00 1.93E-02 Be-7 <1.89E-01 0.00E+00 1.89E-01 K-40 <6.28E-01 0.00E+00 6.28E-01 Sample ID: 358665 Sample Dates: 10/20/2014 - 10/27/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.99E-02 0.00E+00 1.99E-02 Cs-134 <1.98E-02 0.00E+00 1.98E-02 Cs-137 <1.62E-02 0.00E+00 1.62E-02 Be-7 <1.18E-01 0.00E+00 1.18E-01 K-40 6.79E-01 2.89E-01 8.00E-02 Sample ID: 359311 Sample Dates: 10/27/2014 - 11/3/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.15E-02 0.00E+00 2.15E-02 Cs-134 <3.84E-03 0.00E+00 3.84E-03 Cs-137 <1.91E-02 0.00E+00 1.91E-02 Be-7 <1.33E-01 0.00E+00 1.33E-01 K-40 3.59E-01 2.66E-01 3.51E-01 Sample ID: 360039 Sample Dates: 11/3/2014 - 11/10/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.91E-02 0.00E+00 1.91E-02 Cs-134 <1.30E-02 0.00E+00 1.30E-02 Cs-137 <9.99E-03 0.00E+00 9.99E-03 Be-7 <7.97E-02 0.00E+00 7.97E-02 K-40 6.31E-01 2.69E-01 2.22E-01 Sample ID: 360721 Sample Dates: 11/10/2014 - 11/17/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.19E-02 0.00E+00 2.19E-02 Cs-134 <1.53E-02 0.00E+00 1.53E-02 Cs-137 <2.33E-02 0.00E+00 2.33E-02 Be-7 <1.36E-01 0.00E+00 1.36E-01 K-40 3.90E-01 2.19E-01 8.12E-02 Sample ID: 361583 Sample Dates: 11/17/2014 - 11/24/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.16E-02 0.00E+00 2.16E-02 Cs-134 <1.32E-02 0.00E+00 1.32E-02 Cs-137 <2.14E-02 0.00E+00 2.14E-02 Be-7 <1.46E-01 0.00E+00 1.46E-01 K-40 <6.22E-01 0.00E+00 6.22E-01 Sample ID: 361962 Sample Dates: 11/24/2014 - 12/1/2014 Nuclide Activity Sigma Error 1 LLD I-131 <2.27E-02 0.00E+00 2.27E-02 Cs-134 <1.19E-02 0.00E+00 1.19E-02 Cs-137 <1.66E-02 0.00E+00 1.66E-02 Be-7 <1.12E-01 0.00E+00 1.12E-01 K-40 3.71E-01 2.32E-01 2.79E-01 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 47 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 362792 Sample Dates: 12/1/2014 - 12/8/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.16E-02 0.00E+00 1.16E-02 Cs-134 <9.55E-03 0.00E+00 9.55E-03 Cs-137 <1.10E-02 0.00E+00 1.10E-02 Be-7 <1.05E-01 0.00E+00 1.05E-01 K-40 4.36E-01 1.73E-01 1.43E-01 Sample ID: 363532 Sample Dates: 12/8/2014 - 12/15/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.19E-02 0.00E+00 1.19E-02 Cs-134 <9.20E-03 0.00E+00 9.20E-03 Cs-137 <1.14E-02 0.00E+00 1.14E-02 Be-7 3.46E-02 3.86E-02 5.89E-02 K-40 4.35E-01 1.92E-01 2.05E-01 Sample ID: 363979 Sample Dates: 12/15/2014 - 12/22/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.63E-02 0.00E+00 1.63E-02 Cs-134 <1.54E-02 0.00E+00 1.54E-02 Cs-137 <1.64E-02 0.00E+00 1.64E-02 Be-7 4.20E-02 4.15E-02 5.65E-02 K-40 7.39E-01 2.36E-01 4.77E-02 Sample ID: 364521 Sample Dates: 12/22/2014 - 12/29/2014 Nuclide Activity Sigma Error 1 LLD I-131 <1.17E-02 0.00E+00 1.17E-02 Cs-134 <7.42E-03 0.00E+00 7.42E-03 Cs-137 <1.49E-02 0.00E+00 1.49E-02 Be-7 <8.22E-02 0.00E+00 8.22E-02 K-40 4.96E-01 1.89E-01 1.63E-01 Media Type: DRINKING WATER Concentration (Activity): pCi/l Sample Point 060 [ INDICATOR - NE @ 3.23 miles ]

Sample ID: 279017 Sample Dates: 12/9/2013 - 1/6/2014 Nuclide Activity Sigma Error 1 LLD Beta <2.78E-01 0.00E+00 1.20E+00 Mn-54 <2.39E+00 0.00E+00 2.39E+00 Co-58 <2.51E+00 0.00E+00 2.51E+00 Fe-59 <5.95E+00 0.00E+00 5.95E+00 Co-60 <3.30E+00 0.00E+00 3.30E+00 Zn-65 <5.51E+00 0.00E+00 5.51E+00 Zr-95 <4.66E+00 0.00E+00 4.66E+00 Nb-95 <4.04E+00 0.00E+00 4.04E+00 I-131 <1.44E+01 0.00E+00 1.44E+01 Cs-134 <2.28E+00 0.00E+00 2.28E+00 Cs-137 <2.68E+00 0.00E+00 2.68E+00 BaLa-140 <8.59E+00 0.00E+00 8.59E+00 Be-7 <2.80E+01 0.00E+00 2.80E+01 K-40 9.55E+01 1.64E+01 2.96E+01 Sample ID: 280863 Sample Dates: 1/6/2014 - 2/3/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.05E+00 3.70E-01 1.18E+00 Mn-54 <3.94E+00 0.00E+00 3.94E+00 Co-58 <4.28E+00 0.00E+00 4.28E+00 Fe-59 <6.58E+00 0.00E+00 6.58E+00 Co-60 <3.50E+00 0.00E+00 3.50E+00 Zn-65 <7.54E+00 0.00E+00 7.54E+00 Zr-95 <6.30E+00 0.00E+00 6.30E+00 Nb-95 <4.49E+00 0.00E+00 4.49E+00 I-131 <1.43E+01 0.00E+00 1.43E+01 Cs-134 <3.52E+00 0.00E+00 3.52E+00 Cs-137 <3.38E+00 0.00E+00 3.38E+00 BaLa-140 <7.70E+00 0.00E+00 7.70E+00 Be-7 <3.68E+01 0.00E+00 3.68E+01 K-40 1.70E+02 2.52E+01 3.33E+01 Sample ID: 282978 Sample Dates: 2/3/2014 - 3/3/2014 Nuclide Activity Sigma Error 1 LLD Beta <4.58E-01 0.00E+00 1.29E+00 Mn-54 <3.37E+00 0.00E+00 3.37E+00 Co-58 <3.77E+00 0.00E+00 3.77E+00 Fe-59 <7.38E+00 0.00E+00 7.38E+00 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 48 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 282978 Sample Dates: 2/3/2014 - 3/3/2014 Nuclide Activity Sigma Error 1 LLD Co-60 <3.72E+00 0.00E+00 3.72E+00 Zn-65 <7.34E+00 0.00E+00 7.34E+00 Zr-95 <7.39E+00 0.00E+00 7.39E+00 Nb-95 <4.67E+00 0.00E+00 4.67E+00 I-131 <1.43E+01 0.00E+00 1.43E+01 Cs-134 <3.05E+00 0.00E+00 3.05E+00 Cs-137 <3.76E+00 0.00E+00 3.76E+00 BaLa-140 <9.06E+00 0.00E+00 9.06E+00 Be-7 <3.35E+01 0.00E+00 3.35E+01 K-40 1.36E+02 2.24E+01 3.15E+01 Sample ID: 284706 Sample Dates: 12/9/2013 - 3/3/2014 Nuclide Activity Sigma Error 1 LLD H3DW <-2.4E+00 0.00E+00 1.88E+02 Sample ID: 285758 Sample Dates: 3/3/2014 - 3/31/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.62E+00 3.57E-01 1.08E+00 Mn-54 <2.62E+00 0.00E+00 2.62E+00 Co-58 <2.39E+00 0.00E+00 2.39E+00 Fe-59 <6.01E+00 0.00E+00 6.01E+00 Co-60 <3.23E+00 0.00E+00 3.23E+00 Zn-65 <5.09E+00 0.00E+00 5.09E+00 Zr-95 <3.95E+00 0.00E+00 3.95E+00 Nb-95 <3.16E+00 0.00E+00 3.16E+00 I-131 <8.80E+00 0.00E+00 8.80E+00 Cs-134 <2.29E+00 0.00E+00 2.29E+00 Cs-137 <2.80E+00 0.00E+00 2.80E+00 BaLa-140 <5.95E+00 0.00E+00 5.95E+00 Be-7 <2.52E+01 0.00E+00 2.52E+01 K-40 1.01E+02 1.54E+01 2.28E+01 Sample ID: 289122 Sample Dates: 3/31/2014 - 4/28/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.36E+00 3.97E-01 1.27E+00 Mn-54 <2.91E+00 0.00E+00 2.91E+00 Co-58 <3.70E+00 0.00E+00 3.70E+00 Fe-59 <5.91E+00 0.00E+00 5.91E+00 Co-60 <3.13E+00 0.00E+00 3.13E+00 Zn-65 <6.37E+00 0.00E+00 6.37E+00 Zr-95 <6.07E+00 0.00E+00 6.07E+00 Nb-95 <3.80E+00 0.00E+00 3.80E+00 I-131 <1.21E+01 0.00E+00 1.21E+01 Cs-134 <3.06E+00 0.00E+00 3.06E+00 Cs-137 <3.44E+00 0.00E+00 3.44E+00 BaLa-140 <8.30E+00 0.00E+00 8.30E+00 Be-7 <2.71E+01 0.00E+00 2.71E+01 K-40 1.74E+02 1.97E+01 2.83E+01 Sample ID: 292817 Sample Dates: 4/28/2014 - 5/27/2014 Nuclide Activity Sigma Error 1 LLD Beta <5.96E-01 0.00E+00 1.34E+00 Mn-54 <3.15E+00 0.00E+00 3.15E+00 Co-58 <3.78E+00 0.00E+00 3.78E+00 Fe-59 <6.64E+00 0.00E+00 6.64E+00 Co-60 <3.44E+00 0.00E+00 3.44E+00 Zn-65 <6.13E+00 0.00E+00 6.13E+00 Zr-95 <5.36E+00 0.00E+00 5.36E+00 Nb-95 <3.85E+00 0.00E+00 3.85E+00 I-131 <1.24E+01 0.00E+00 1.24E+01 Cs-134 <2.86E+00 0.00E+00 2.86E+00 Cs-137 <2.96E+00 0.00E+00 2.96E+00 BaLa-140 <1.02E+01 0.00E+00 1.02E+01 Be-7 <2.82E+01 0.00E+00 2.82E+01 K-40 3.09E+01 1.11E+01 3.18E+01 Sample ID: 295224 Sample Dates: 3/3/2014 - 5/27/2014 Nuclide Activity Sigma Error 1 LLD H3DW <-4.1E+01 0.00E+00 1.88E+02 Sample ID: 295480 Sample Dates: 5/27/2014 - 6/23/2014 Nuclide Activity Sigma Error 1 LLD Beta 7.19E-01 3.67E-01 1.19E+00 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 49 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 295480 Sample Dates: 5/27/2014 - 6/23/2014 Nuclide Activity Sigma Error 1 LLD Mn-54 <3.63E+00 0.00E+00 3.63E+00 Co-58 <4.05E+00 0.00E+00 4.05E+00 Fe-59 <8.42E+00 0.00E+00 8.42E+00 Co-60 <4.52E+00 0.00E+00 4.52E+00 Zn-65 <6.30E+00 0.00E+00 6.30E+00 Zr-95 <5.03E+00 0.00E+00 5.03E+00 Nb-95 <4.61E+00 0.00E+00 4.61E+00 I-131 <1.44E+01 0.00E+00 1.44E+01 Cs-134 <3.38E+00 0.00E+00 3.38E+00 Cs-137 <4.67E+00 0.00E+00 4.67E+00 BaLa-140 <7.83E+00 0.00E+00 7.83E+00 Be-7 <3.50E+01 0.00E+00 3.50E+01 K-40 9.62E+01 1.74E+01 2.56E+01 Sample ID: 296988 Sample Dates: 6/23/2014 - 7/21/2014 Nuclide Activity Sigma Error 1 LLD Beta <5.56E-01 0.00E+00 1.36E+00 Mn-54 <1.17E+00 0.00E+00 1.17E+00 Co-58 <1.35E+00 0.00E+00 1.35E+00 Fe-59 <3.17E+00 0.00E+00 3.17E+00 Co-60 <1.34E+00 0.00E+00 1.34E+00 Zn-65 <2.37E+00 0.00E+00 2.37E+00 Zr-95 <2.45E+00 0.00E+00 2.45E+00 Nb-95 <1.94E+00 0.00E+00 1.94E+00 I-131 <1.19E+01 0.00E+00 1.19E+01 Cs-134 <1.04E+00 0.00E+00 1.04E+00 Cs-137 <1.44E+00 0.00E+00 1.44E+00 BaLa-140 <5.75E+00 0.00E+00 5.75E+00 Be-7 <1.36E+01 0.00E+00 1.36E+01 K-40 8.41E+01 1.66E+01 2.03E+01 Sample ID: 353551 Sample Dates: 7/21/2014 - 8/18/2014 Nuclide Activity Sigma Error 1 LLD Beta 7.29E-01 7.18E-01 1.19E+00 Mn-54 <3.06E+00 0.00E+00 3.06E+00 Co-58 <3.81E+00 0.00E+00 3.81E+00 Fe-59 <8.33E+00 0.00E+00 8.33E+00 Co-60 <4.60E+00 0.00E+00 4.60E+00 Zn-65 <7.74E+00 0.00E+00 7.74E+00 Zr-95 <7.16E+00 0.00E+00 7.16E+00 Nb-95 <4.47E+00 0.00E+00 4.47E+00 I-131 <1.14E+01 0.00E+00 1.14E+01 Cs-134 <4.16E+00 0.00E+00 4.16E+00 Cs-137 <2.61E+00 0.00E+00 2.61E+00 BaLa-140 <1.00E+01 0.00E+00 1.00E+01 Be-7 <3.25E+01 0.00E+00 3.25E+01 K-40 6.01E+01 3.49E+01 5.00E+01 Sample ID: 354209 Sample Dates: 5/27/2014 - 8/18/2014 Nuclide Activity Sigma Error 1 LLD H3DW <1.11E+02 0.00E+00 1.88E+02 Sample ID: 354590 Sample Dates: 8/18/2014 - 9/15/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.10E+00 7.49E-01 1.22E+00 Mn-54 <1.87E+00 0.00E+00 1.87E+00 Co-58 <1.90E+00 0.00E+00 1.90E+00 Fe-59 <4.14E+00 0.00E+00 4.14E+00 Co-60 <1.86E+00 0.00E+00 1.86E+00 Zn-65 <4.07E+00 0.00E+00 4.07E+00 Zr-95 <3.74E+00 0.00E+00 3.74E+00 Nb-95 <2.84E+00 0.00E+00 2.84E+00 I-131 <7.48E+00 0.00E+00 7.48E+00 Cs-134 <2.26E+00 0.00E+00 2.26E+00 Cs-137 <1.92E+00 0.00E+00 1.92E+00 BaLa-140 <3.64E+00 0.00E+00 3.64E+00 Be-7 <1.88E+01 0.00E+00 1.88E+01 K-40 5.49E+01 2.25E+01 3.08E+01 Sample ID: 356861 Sample Dates: 9/15/2014 - 10/13/2014 Nuclide Activity Sigma Error 1 LLD Beta <0.00E+00 0.00E+00 1.26E+00 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 50 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 356861 Sample Dates: 9/15/2014 - 10/13/2014 Nuclide Activity Sigma Error 1 LLD Mn-54 <2.78E+00 0.00E+00 2.78E+00 Co-58 <3.15E+00 0.00E+00 3.15E+00 Fe-59 <6.26E+00 0.00E+00 6.26E+00 Co-60 <3.17E+00 0.00E+00 3.17E+00 Zn-65 <5.65E+00 0.00E+00 5.65E+00 Zr-95 <6.49E+00 0.00E+00 6.49E+00 Nb-95 <4.21E+00 0.00E+00 4.21E+00 I-131 <9.24E+00 0.00E+00 9.24E+00 Cs-134 <3.00E+00 0.00E+00 3.00E+00 Cs-137 <2.63E+00 0.00E+00 2.63E+00 BaLa-140 <8.09E+00 0.00E+00 8.09E+00 Be-7 <2.52E+01 0.00E+00 2.52E+01 K-40 1.11E+02 3.19E+01 3.71E+01 Sample ID: 359752 Sample Dates: 10/13/2014 - 11/10/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.31E+00 7.37E-01 1.18E+00 Mn-54 <1.39E+00 0.00E+00 1.39E+00 Co-58 <1.98E+00 0.00E+00 1.98E+00 Fe-59 <3.65E+00 0.00E+00 3.65E+00 Co-60 <1.47E+00 0.00E+00 1.47E+00 Zn-65 <2.97E+00 0.00E+00 2.97E+00 Zr-95 <2.53E+00 0.00E+00 2.53E+00 Nb-95 <2.16E+00 0.00E+00 2.16E+00 I-131 <1.01E+01 0.00E+00 1.01E+01 Cs-134 <1.67E+00 0.00E+00 1.67E+00 Cs-137 <1.28E+00 0.00E+00 1.28E+00 BaLa-140 <4.68E+00 0.00E+00 4.68E+00 Be-7 <1.59E+01 0.00E+00 1.59E+01 K-40 1.71E+01 1.35E+01 2.10E+01 Sample ID: 362149 Sample Dates: 11/10/2014 - 12/8/2014 Nuclide Activity Sigma Error 1 LLD Beta <-2.9E-01 0.00E+00 1.33E+00 Mn-54 <9.61E-01 0.00E+00 9.61E-01 Co-58 <1.29E+00 0.00E+00 1.29E+00 Fe-59 <2.93E+00 0.00E+00 2.93E+00 Co-60 <1.01E+00 0.00E+00 1.01E+00 Zn-65 <1.96E+00 0.00E+00 1.96E+00 Zr-95 <2.29E+00 0.00E+00 2.29E+00 Nb-95 <1.69E+00 0.00E+00 1.69E+00 I-131 <1.20E+01 0.00E+00 1.20E+01 Cs-134 <1.14E+00 0.00E+00 1.14E+00 Cs-137 <9.61E-01 0.00E+00 9.61E-01 BaLa-140 <4.82E+00 0.00E+00 4.82E+00 Be-7 <1.04E+01 0.00E+00 1.04E+01 K-40 1.03E+02 1.49E+01 1.57E+01 Sample ID: 364866 Sample Dates: 8/18/2014 - 12/8/2014 Nuclide Activity Sigma Error 1 LLD H3DW <5.03E+00 0.00E+00 1.91E+02 Sample Point 064 [ CONTROL - SSW @ 6.67 miles ]

Sample ID: 279018 Sample Dates: 12/9/2013 - 1/6/2014 Nuclide Activity Sigma Error 1 LLD Beta <5.11E-01 0.00E+00 1.21E+00 Mn-54 <2.87E+00 0.00E+00 2.87E+00 Co-58 <3.26E+00 0.00E+00 3.26E+00 Fe-59 <5.97E+00 0.00E+00 5.97E+00 Co-60 <3.10E+00 0.00E+00 3.10E+00 Zn-65 <6.64E+00 0.00E+00 6.64E+00 Zr-95 <5.62E+00 0.00E+00 5.62E+00 Nb-95 <4.58E+00 0.00E+00 4.58E+00 I-131 <1.34E+01 0.00E+00 1.34E+01 Cs-134 <2.65E+00 0.00E+00 2.65E+00 Cs-137 <3.26E+00 0.00E+00 3.26E+00 BaLa-140 <7.70E+00 0.00E+00 7.70E+00 Be-7 <2.95E+01 0.00E+00 2.95E+01 K-40 1.91E+02 2.17E+01 2.87E+01 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 51 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 280864 Sample Dates: 1/6/2014 - 2/3/2014 Nuclide Activity Sigma Error 1 LLD Beta 7.59E-01 3.62E-01 1.18E+00 Mn-54 <3.67E+00 0.00E+00 3.67E+00 Co-58 <4.44E+00 0.00E+00 4.44E+00 Fe-59 <8.28E+00 0.00E+00 8.28E+00 Co-60 <4.75E+00 0.00E+00 4.75E+00 Zn-65 <8.03E+00 0.00E+00 8.03E+00 Zr-95 <6.02E+00 0.00E+00 6.02E+00 Nb-95 <5.27E+00 0.00E+00 5.27E+00 I-131 <1.33E+01 0.00E+00 1.33E+01 Cs-134 <3.77E+00 0.00E+00 3.77E+00 Cs-137 <2.82E+00 0.00E+00 2.82E+00 BaLa-140 <8.96E+00 0.00E+00 8.96E+00 Be-7 <2.99E+01 0.00E+00 2.99E+01 K-40 <6.31E+01 0.00E+00 6.31E+01 Sample ID: 282979 Sample Dates: 2/3/2014 - 3/3/2014 Nuclide Activity Sigma Error 1 LLD Beta <1.02E-01 0.00E+00 1.29E+00 Mn-54 <3.82E+00 0.00E+00 3.82E+00 Co-58 <3.66E+00 0.00E+00 3.66E+00 Fe-59 <7.44E+00 0.00E+00 7.44E+00 Co-60 <3.75E+00 0.00E+00 3.75E+00 Zn-65 <6.95E+00 0.00E+00 6.95E+00 Zr-95 <6.69E+00 0.00E+00 6.69E+00 Nb-95 <4.30E+00 0.00E+00 4.30E+00 I-131 <1.24E+01 0.00E+00 1.24E+01 Cs-134 <3.07E+00 0.00E+00 3.07E+00 Cs-137 <3.02E+00 0.00E+00 3.02E+00 BaLa-140 <7.68E+00 0.00E+00 7.68E+00 Be-7 <3.34E+01 0.00E+00 3.34E+01 K-40 1.00E+02 1.95E+01 2.94E+01 Sample ID: 284707 Sample Dates: 12/9/2013 - 3/3/2014 Nuclide Activity Sigma Error 1 LLD H3DW <-3.3E+01 0.00E+00 1.89E+02 Sample ID: 285759 Sample Dates: 3/3/2014 - 3/31/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.39E+00 3.52E-01 1.08E+00 Mn-54 <3.43E+00 0.00E+00 3.43E+00 Co-58 <3.50E+00 0.00E+00 3.50E+00 Fe-59 <7.11E+00 0.00E+00 7.11E+00 Co-60 <2.92E+00 0.00E+00 2.92E+00 Zn-65 <5.89E+00 0.00E+00 5.89E+00 Zr-95 <5.48E+00 0.00E+00 5.48E+00 Nb-95 <3.97E+00 0.00E+00 3.97E+00 I-131 <1.40E+01 0.00E+00 1.40E+01 Cs-134 <3.08E+00 0.00E+00 3.08E+00 Cs-137 <3.14E+00 0.00E+00 3.14E+00 BaLa-140 <7.45E+00 0.00E+00 7.45E+00 Be-7 <3.16E+01 0.00E+00 3.16E+01 K-40 1.92E+02 2.24E+01 3.08E+01 Sample ID: 289123 Sample Dates: 3/31/2014 - 4/28/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.27E+00 3.94E-01 1.27E+00 Mn-54 <2.66E+00 0.00E+00 2.66E+00 Co-58 <3.03E+00 0.00E+00 3.03E+00 Fe-59 <5.78E+00 0.00E+00 5.78E+00 Co-60 <2.96E+00 0.00E+00 2.96E+00 Zn-65 <7.57E+00 0.00E+00 7.57E+00 Zr-95 <5.74E+00 0.00E+00 5.74E+00 Nb-95 <3.48E+00 0.00E+00 3.48E+00 I-131 <1.21E+01 0.00E+00 1.21E+01 Cs-134 <2.83E+00 0.00E+00 2.83E+00 Cs-137 <3.27E+00 0.00E+00 3.27E+00 BaLa-140 <7.60E+00 0.00E+00 7.60E+00 Be-7 <2.83E+01 0.00E+00 2.83E+01 K-40 9.57E+01 2.12E+01 3.14E+01 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 52 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 292818 Sample Dates: 4/28/2014 - 5/27/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.33E+00 4.16E-01 1.34E+00 Mn-54 <1.78E+00 0.00E+00 1.78E+00 Co-58 <2.72E+00 0.00E+00 2.72E+00 Fe-59 <5.48E+00 0.00E+00 5.48E+00 Co-60 <2.31E+00 0.00E+00 2.31E+00 Zn-65 <4.77E+00 0.00E+00 4.77E+00 Zr-95 <4.81E+00 0.00E+00 4.81E+00 Nb-95 <3.67E+00 0.00E+00 3.67E+00 I-131 <1.39E+01 0.00E+00 1.39E+01 Cs-134 <1.99E+00 0.00E+00 1.99E+00 Cs-137 <2.12E+00 0.00E+00 2.12E+00 BaLa-140 <6.55E+00 0.00E+00 6.55E+00 Be-7 <2.49E+01 0.00E+00 2.49E+01 K-40 1.74E+02 1.82E+01 1.67E+01 Sample ID: 295225 Sample Dates: 3/3/2014 - 5/27/2014 Nuclide Activity Sigma Error 1 LLD H3DW <-2.2E+01 0.00E+00 1.88E+02 Sample ID: 295481 Sample Dates: 5/27/2014 - 6/23/2014 Nuclide Activity Sigma Error 1 LLD Beta 9.41E-01 3.71E-01 1.19E+00 Mn-54 <3.51E+00 0.00E+00 3.51E+00 Co-58 <3.22E+00 0.00E+00 3.22E+00 Fe-59 <8.15E+00 0.00E+00 8.15E+00 Co-60 <4.97E+00 0.00E+00 4.97E+00 Zn-65 <7.66E+00 0.00E+00 7.66E+00 Zr-95 <6.83E+00 0.00E+00 6.83E+00 Nb-95 <4.93E+00 0.00E+00 4.93E+00 I-131 <1.44E+01 0.00E+00 1.44E+01 Cs-134 <3.15E+00 0.00E+00 3.15E+00 Cs-137 <3.85E+00 0.00E+00 3.85E+00 BaLa-140 <1.05E+01 0.00E+00 1.05E+01 Be-7 <3.22E+01 0.00E+00 3.22E+01 K-40 4.04E+01 1.87E+01 4.12E+01 Sample ID: 296989 Sample Dates: 6/23/2014 - 7/21/2014 Nuclide Activity Sigma Error 1 LLD Beta 8.98E-01 8.21E-01 1.36E+00 Mn-54 <1.31E+00 0.00E+00 1.31E+00 Co-58 <1.55E+00 0.00E+00 1.55E+00 Fe-59 <3.36E+00 0.00E+00 3.36E+00 Co-60 <1.49E+00 0.00E+00 1.49E+00 Zn-65 <2.92E+00 0.00E+00 2.92E+00 Zr-95 <2.93E+00 0.00E+00 2.93E+00 Nb-95 <2.35E+00 0.00E+00 2.35E+00 I-131 <1.10E+01 0.00E+00 1.10E+01 Cs-134 <1.19E+00 0.00E+00 1.19E+00 Cs-137 <1.30E+00 0.00E+00 1.30E+00 BaLa-140 <5.54E+00 0.00E+00 5.54E+00 Be-7 <1.38E+01 0.00E+00 1.38E+01 K-40 9.80E+01 2.09E+01 2.70E+01 Sample ID: 353552 Sample Dates: 7/21/2014 - 8/18/2014 Nuclide Activity Sigma Error 1 LLD Beta 9.66E-01 7.25E-01 1.19E+00 Mn-54 <3.03E+00 0.00E+00 3.03E+00 Co-58 <3.37E+00 0.00E+00 3.37E+00 Fe-59 <7.46E+00 0.00E+00 7.46E+00 Co-60 <4.14E+00 0.00E+00 4.14E+00 Zn-65 <7.31E+00 0.00E+00 7.31E+00 Zr-95 <6.59E+00 0.00E+00 6.59E+00 Nb-95 <4.28E+00 0.00E+00 4.28E+00 I-131 <1.07E+01 0.00E+00 1.07E+01 Cs-134 <4.04E+00 0.00E+00 4.04E+00 Cs-137 <3.24E+00 0.00E+00 3.24E+00 BaLa-140 <8.10E+00 0.00E+00 8.10E+00 Be-7 <2.57E+01 0.00E+00 2.57E+01 K-40 7.82E+01 3.45E+01 4.44E+01 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 53 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 354210 Sample Dates: 5/27/2014 - 8/18/2014 Nuclide Activity Sigma Error 1 LLD H3DW <1.36E+02 0.00E+00 1.90E+02 Sample ID: 354591 Sample Dates: 8/18/2014 - 9/15/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.05E+00 7.49E-01 1.22E+00 Mn-54 <1.75E+00 0.00E+00 1.75E+00 Co-58 <2.06E+00 0.00E+00 2.06E+00 Fe-59 <4.45E+00 0.00E+00 4.45E+00 Co-60 <1.60E+00 0.00E+00 1.60E+00 Zn-65 <3.59E+00 0.00E+00 3.59E+00 Zr-95 <3.92E+00 0.00E+00 3.92E+00 Nb-95 <2.70E+00 0.00E+00 2.70E+00 I-131 <1.19E+01 0.00E+00 1.19E+01 Cs-134 <2.10E+00 0.00E+00 2.10E+00 Cs-137 <1.66E+00 0.00E+00 1.66E+00 BaLa-140 <5.52E+00 0.00E+00 5.52E+00 Be-7 <1.79E+01 0.00E+00 1.79E+01 K-40 2.11E+02 3.17E+01 3.13E+01 Sample ID: 356862 Sample Dates: 9/15/2014 - 10/13/2014 Nuclide Activity Sigma Error 1 LLD Beta 8.98E-01 7.53E-01 1.26E+00 Mn-54 <2.61E+00 0.00E+00 2.61E+00 Co-58 <2.72E+00 0.00E+00 2.72E+00 Fe-59 <5.69E+00 0.00E+00 5.69E+00 Co-60 <2.70E+00 0.00E+00 2.70E+00 Zn-65 <4.81E+00 0.00E+00 4.81E+00 Zr-95 <5.43E+00 0.00E+00 5.43E+00 Nb-95 <3.48E+00 0.00E+00 3.48E+00 I-131 <1.03E+01 0.00E+00 1.03E+01 Cs-134 <2.94E+00 0.00E+00 2.94E+00 Cs-137 <2.25E+00 0.00E+00 2.25E+00 BaLa-140 <6.05E+00 0.00E+00 6.05E+00 Be-7 <2.31E+01 0.00E+00 2.31E+01 K-40 1.75E+02 3.75E+01 3.99E+01 Sample ID: 359753 Sample Dates: 10/13/2014 - 11/10/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.74E+00 7.57E-01 1.18E+00 Mn-54 <1.48E+00 0.00E+00 1.48E+00 Co-58 <1.88E+00 0.00E+00 1.88E+00 Fe-59 <4.23E+00 0.00E+00 4.23E+00 Co-60 <1.41E+00 0.00E+00 1.41E+00 Zn-65 <3.49E+00 0.00E+00 3.49E+00 Zr-95 <3.59E+00 0.00E+00 3.59E+00 Nb-95 <2.47E+00 0.00E+00 2.47E+00 I-131 <1.08E+01 0.00E+00 1.08E+01 Cs-134 <1.86E+00 0.00E+00 1.86E+00 Cs-137 <1.50E+00 0.00E+00 1.50E+00 BaLa-140 <5.64E+00 0.00E+00 5.64E+00 Be-7 <1.57E+01 0.00E+00 1.57E+01 K-40 1.75E+02 2.56E+01 2.29E+01 Sample ID: 362150 Sample Dates: 11/10/2014 - 12/8/2014 Nuclide Activity Sigma Error 1 LLD Beta <-9.1E-02 0.00E+00 1.33E+00 Mn-54 <6.26E-01 0.00E+00 6.26E-01 Co-58 <7.76E-01 0.00E+00 7.76E-01 Fe-59 <1.65E+00 0.00E+00 1.65E+00 Co-60 <6.18E-01 0.00E+00 6.18E-01 Zn-65 <1.27E+00 0.00E+00 1.27E+00 Zr-95 <1.57E+00 0.00E+00 1.57E+00 Nb-95 <1.31E+00 0.00E+00 1.31E+00 I-131 <1.17E+01 0.00E+00 1.17E+01 Cs-134 <6.84E-01 0.00E+00 6.84E-01 Cs-137 <6.54E-01 0.00E+00 6.54E-01 BaLa-140 <3.65E+00 0.00E+00 3.65E+00 Be-7 <7.41E+00 0.00E+00 7.41E+00 K-40 4.50E+01 1.20E+01 1.77E+01 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 54 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 364867 Sample Dates: 8/18/2014 - 12/8/2014 Nuclide Activity Sigma Error 1 LLD H3DW <1.58E+02 0.00E+00 1.91E+02 Sample Point 066 [ INDICATOR - SSE @ 18.9 miles ]

Sample ID: 279019 Sample Dates: 12/9/2013 - 1/6/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.23E+00 3.83E-01 1.21E+00 Mn-54 <3.58E+00 0.00E+00 3.58E+00 Co-58 <3.56E+00 0.00E+00 3.56E+00 Fe-59 <7.06E+00 0.00E+00 7.06E+00 Co-60 <2.22E+00 0.00E+00 2.22E+00 Zn-65 <7.77E+00 0.00E+00 7.77E+00 Zr-95 <7.51E+00 0.00E+00 7.51E+00 Nb-95 <5.05E+00 0.00E+00 5.05E+00 I-131 <1.43E+01 0.00E+00 1.43E+01 Cs-134 <3.27E+00 0.00E+00 3.27E+00 Cs-137 <3.71E+00 0.00E+00 3.71E+00 BaLa-140 <1.04E+01 0.00E+00 1.04E+01 Be-7 <3.44E+01 0.00E+00 3.44E+01 K-40 1.18E+02 1.98E+01 3.26E+01 Sample ID: 280865 Sample Dates: 1/6/2014 - 2/3/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.01E+00 3.70E-01 1.18E+00 Mn-54 <3.00E+00 0.00E+00 3.00E+00 Co-58 <3.78E+00 0.00E+00 3.78E+00 Fe-59 <7.90E+00 0.00E+00 7.90E+00 Co-60 <3.76E+00 0.00E+00 3.76E+00 Zn-65 <7.14E+00 0.00E+00 7.14E+00 Zr-95 <6.42E+00 0.00E+00 6.42E+00 Nb-95 <3.75E+00 0.00E+00 3.75E+00 I-131 <1.16E+01 0.00E+00 1.16E+01 Cs-134 <3.10E+00 0.00E+00 3.10E+00 Cs-137 <3.81E+00 0.00E+00 3.81E+00 BaLa-140 <6.78E+00 0.00E+00 6.78E+00 Be-7 <3.16E+01 0.00E+00 3.16E+01 K-40 1.17E+02 1.92E+01 2.79E+01 Sample ID: 282980 Sample Dates: 2/3/2014 - 3/3/2014 Nuclide Activity Sigma Error 1 LLD Beta 9.37E-01 4.01E-01 1.29E+00 Mn-54 <3.51E+00 0.00E+00 3.51E+00 Co-58 <3.36E+00 0.00E+00 3.36E+00 Fe-59 <6.86E+00 0.00E+00 6.86E+00 Co-60 <2.63E+00 0.00E+00 2.63E+00 Zn-65 <6.10E+00 0.00E+00 6.10E+00 Zr-95 <5.32E+00 0.00E+00 5.32E+00 Nb-95 <4.38E+00 0.00E+00 4.38E+00 I-131 <1.39E+01 0.00E+00 1.39E+01 Cs-134 <2.84E+00 0.00E+00 2.84E+00 Cs-137 <3.25E+00 0.00E+00 3.25E+00 BaLa-140 <8.06E+00 0.00E+00 8.06E+00 Be-7 <3.04E+01 0.00E+00 3.04E+01 K-40 1.78E+02 2.04E+01 2.69E+01 Sample ID: 284708 Sample Dates: 12/9/2013 - 3/3/2014 Nuclide Activity Sigma Error 1 LLD H3DW <1.73E+02 0.00E+00 1.89E+02 Sample ID: 285760 Sample Dates: 3/3/2014 - 3/31/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.00E+00 3.69E-01 1.09E+00 Mn-54 <3.43E+00 0.00E+00 3.43E+00 Co-58 <3.90E+00 0.00E+00 3.90E+00 Fe-59 <9.29E+00 0.00E+00 9.29E+00 Co-60 <4.84E+00 0.00E+00 4.84E+00 Zn-65 <8.99E+00 0.00E+00 8.99E+00 Zr-95 <6.71E+00 0.00E+00 6.71E+00 Nb-95 <5.73E+00 0.00E+00 5.73E+00 I-131 <1.43E+01 0.00E+00 1.43E+01 Cs-134 <3.42E+00 0.00E+00 3.42E+00 Cs-137 <4.51E+00 0.00E+00 4.51E+00 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 55 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 285760 Sample Dates: 3/3/2014 - 3/31/2014 Nuclide Activity Sigma Error 1 LLD BaLa-140 <1.23E+01 0.00E+00 1.23E+01 Be-7 <3.31E+01 0.00E+00 3.31E+01 K-40 7.84E+01 1.48E+01 3.84E+01 Sample ID: 289124 Sample Dates: 3/31/2014 - 4/28/2014 Nuclide Activity Sigma Error 1 LLD Beta 2.34E+00 4.21E-01 1.28E+00 Mn-54 <2.36E+00 0.00E+00 2.36E+00 Co-58 <2.85E+00 0.00E+00 2.85E+00 Fe-59 <5.24E+00 0.00E+00 5.24E+00 Co-60 <3.25E+00 0.00E+00 3.25E+00 Zn-65 <4.62E+00 0.00E+00 4.62E+00 Zr-95 <5.14E+00 0.00E+00 5.14E+00 Nb-95 <3.34E+00 0.00E+00 3.34E+00 I-131 <1.01E+01 0.00E+00 1.01E+01 Cs-134 <2.27E+00 0.00E+00 2.27E+00 Cs-137 <2.70E+00 0.00E+00 2.70E+00 BaLa-140 <7.46E+00 0.00E+00 7.46E+00 Be-7 <2.65E+01 0.00E+00 2.65E+01 K-40 4.84E+01 1.71E+01 2.75E+01 Sample ID: 292819 Sample Dates: 4/28/2014 - 5/27/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.90E+00 4.32E-01 1.36E+00 Mn-54 <2.43E+00 0.00E+00 2.43E+00 Co-58 <2.74E+00 0.00E+00 2.74E+00 Fe-59 <6.26E+00 0.00E+00 6.26E+00 Co-60 <2.98E+00 0.00E+00 2.98E+00 Zn-65 <4.89E+00 0.00E+00 4.89E+00 Zr-95 <4.80E+00 0.00E+00 4.80E+00 Nb-95 <3.48E+00 0.00E+00 3.48E+00 I-131 <1.44E+01 0.00E+00 1.44E+01 Cs-134 <2.43E+00 0.00E+00 2.43E+00 Cs-137 <2.84E+00 0.00E+00 2.84E+00 BaLa-140 <1.09E+01 0.00E+00 1.09E+01 Be-7 <2.88E+01 0.00E+00 2.88E+01 K-40 6.75E+01 1.50E+01 2.77E+01 Sample ID: 295226 Sample Dates: 3/3/2014 - 5/27/2014 Nuclide Activity Sigma Error 1 LLD H3DW 2.23E+02 6.09E+01 1.88E+02 Sample ID: 295482 Sample Dates: 5/27/2014 - 6/23/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.64E+00 3.91E-01 1.21E+00 Mn-54 <2.88E+00 0.00E+00 2.88E+00 Co-58 <3.69E+00 0.00E+00 3.69E+00 Fe-59 <6.82E+00 0.00E+00 6.82E+00 Co-60 <2.99E+00 0.00E+00 2.99E+00 Zn-65 <5.04E+00 0.00E+00 5.04E+00 Zr-95 <5.06E+00 0.00E+00 5.06E+00 Nb-95 <4.17E+00 0.00E+00 4.17E+00 I-131 <1.29E+01 0.00E+00 1.29E+01 Cs-134 <2.64E+00 0.00E+00 2.64E+00 Cs-137 <3.34E+00 0.00E+00 3.34E+00 BaLa-140 <6.79E+00 0.00E+00 6.79E+00 Be-7 <3.36E+01 0.00E+00 3.36E+01 K-40 1.55E+02 2.22E+01 2.72E+01 Sample ID: 296990 Sample Dates: 6/23/2014 - 7/21/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.13E+00 8.38E-01 1.37E+00 Mn-54 <1.22E+00 0.00E+00 1.22E+00 Co-58 <1.63E+00 0.00E+00 1.63E+00 Fe-59 <3.37E+00 0.00E+00 3.37E+00 Co-60 <1.17E+00 0.00E+00 1.17E+00 Zn-65 <2.60E+00 0.00E+00 2.60E+00 Zr-95 <2.82E+00 0.00E+00 2.82E+00 Nb-95 <2.02E+00 0.00E+00 2.02E+00 I-131 <1.06E+01 0.00E+00 1.06E+01 Cs-134 <1.15E+00 0.00E+00 1.15E+00 Cs-137 <1.33E+00 0.00E+00 1.33E+00 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 56 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 296990 Sample Dates: 6/23/2014 - 7/21/2014 Nuclide Activity Sigma Error 1 LLD BaLa-140 <5.21E+00 0.00E+00 5.21E+00 Be-7 <1.40E+01 0.00E+00 1.40E+01 K-40 1.58E+02 2.09E+01 1.65E+01 Sample ID: 353553 Sample Dates: 7/21/2014 - 8/18/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.16E+00 7.38E-01 1.19E+00 Mn-54 <2.90E+00 0.00E+00 2.90E+00 Co-58 <2.74E+00 0.00E+00 2.74E+00 Fe-59 <6.23E+00 0.00E+00 6.23E+00 Co-60 <3.63E+00 0.00E+00 3.63E+00 Zn-65 <6.56E+00 0.00E+00 6.56E+00 Zr-95 <5.07E+00 0.00E+00 5.07E+00 Nb-95 <3.41E+00 0.00E+00 3.41E+00 I-131 <1.05E+01 0.00E+00 1.05E+01 Cs-134 <3.55E+00 0.00E+00 3.55E+00 Cs-137 <3.06E+00 0.00E+00 3.06E+00 BaLa-140 <8.27E+00 0.00E+00 8.27E+00 Be-7 <2.79E+01 0.00E+00 2.79E+01 K-40 8.41E+01 3.14E+01 3.96E+01 Sample ID: 354211 Sample Dates: 5/27/2014 - 8/18/2014 Nuclide Activity Sigma Error 1 LLD H3DW <1.67E+02 0.00E+00 1.90E+02 Sample ID: 354592 Sample Dates: 8/18/2014 - 9/15/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.81E+00 7.88E-01 1.23E+00 Mn-54 <2.70E+00 0.00E+00 2.70E+00 Co-58 <3.01E+00 0.00E+00 3.01E+00 Fe-59 <6.79E+00 0.00E+00 6.79E+00 Co-60 <2.78E+00 0.00E+00 2.78E+00 Zn-65 <6.43E+00 0.00E+00 6.43E+00 Zr-95 <4.38E+00 0.00E+00 4.38E+00 Nb-95 <3.68E+00 0.00E+00 3.68E+00 I-131 <1.02E+01 0.00E+00 1.02E+01 Cs-134 <3.30E+00 0.00E+00 3.30E+00 Cs-137 <3.38E+00 0.00E+00 3.38E+00 BaLa-140 <7.71E+00 0.00E+00 7.71E+00 Be-7 <2.92E+01 0.00E+00 2.92E+01 K-40 5.96E+01 2.85E+01 3.91E+01 Sample ID: 356863 Sample Dates: 9/15/2014 - 10/13/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.30E+00 7.73E-01 1.27E+00 Mn-54 <3.06E+00 0.00E+00 3.06E+00 Co-58 <3.59E+00 0.00E+00 3.59E+00 Fe-59 <6.91E+00 0.00E+00 6.91E+00 Co-60 <2.41E+00 0.00E+00 2.41E+00 Zn-65 <5.35E+00 0.00E+00 5.35E+00 Zr-95 <5.84E+00 0.00E+00 5.84E+00 Nb-95 <4.21E+00 0.00E+00 4.21E+00 I-131 <1.19E+01 0.00E+00 1.19E+01 Cs-134 <3.63E+00 0.00E+00 3.63E+00 Cs-137 <2.71E+00 0.00E+00 2.71E+00 BaLa-140 <7.93E+00 0.00E+00 7.93E+00 Be-7 <2.77E+01 0.00E+00 2.77E+01 K-40 2.02E+02 3.95E+01 2.83E+01 Sample ID: 359754 Sample Dates: 10/13/2014 - 11/10/2014 Nuclide Activity Sigma Error 1 LLD Beta 1.34E+00 7.44E-01 1.18E+00 Mn-54 <1.90E+00 0.00E+00 1.90E+00 Co-58 <2.14E+00 0.00E+00 2.14E+00 Fe-59 <4.84E+00 0.00E+00 4.84E+00 Co-60 <2.03E+00 0.00E+00 2.03E+00 Zn-65 <3.46E+00 0.00E+00 3.46E+00 Zr-95 <3.94E+00 0.00E+00 3.94E+00 Nb-95 <2.67E+00 0.00E+00 2.67E+00 I-131 <1.19E+01 0.00E+00 1.19E+01 Cs-134 <1.72E+00 0.00E+00 1.72E+00 Cs-137 <1.84E+00 0.00E+00 1.84E+00 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 57 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 359754 Sample Dates: 10/13/2014 - 11/10/2014 Nuclide Activity Sigma Error 1 LLD BaLa-140 <5.56E+00 0.00E+00 5.56E+00 Be-7 <1.80E+01 0.00E+00 1.80E+01 K-40 4.28E+01 1.84E+01 2.45E+01 Sample ID: 362151 Sample Dates: 11/10/2014 - 12/8/2014 Nuclide Activity Sigma Error 1 LLD Beta 8.16E-01 7.94E-01 1.34E+00 Mn-54 <5.34E-01 0.00E+00 5.34E-01 Co-58 <6.99E-01 0.00E+00 6.99E-01 Fe-59 <1.47E+00 0.00E+00 1.47E+00 Co-60 <4.83E-01 0.00E+00 4.83E-01 Zn-65 <1.14E+00 0.00E+00 1.14E+00 Zr-95 <1.33E+00 0.00E+00 1.33E+00 Nb-95 <1.05E+00 0.00E+00 1.05E+00 I-131 <1.20E+01 0.00E+00 1.20E+01 Cs-134 <6.21E-01 0.00E+00 6.21E-01 Cs-137 <5.85E-01 0.00E+00 5.85E-01 BaLa-140 <3.54E+00 0.00E+00 3.54E+00 Be-7 <6.20E+00 0.00E+00 6.20E+00 K-40 4.33E+01 7.19E+00 8.42E+00 Sample ID: 364868 Sample Dates: 8/18/2014 - 12/8/2014 Nuclide Activity Sigma Error 1 LLD H3DW 3.61E+02 1.22E+02 1.90E+02 Media Type: FISH Concentration (Activity): pCi/kg wet Sample Point 060 [ INDICATOR - NE @ 3.23 miles ]

Sample ID: 287056 Sample Dates: 4/14/2014 - 4/14/2014 FREESWIM Nuclide Activity Sigma Error 1 LLD Mn-54 <7.94E+00 0.00E+00 7.94E+00 Co-58 <9.56E+00 0.00E+00 9.56E+00 Fe-59 <2.56E+01 0.00E+00 2.56E+01 Co-60 <1.06E+01 0.00E+00 1.06E+01 Zn-65 <2.18E+01 0.00E+00 2.18E+01 Nb-95 <1.04E+01 0.00E+00 1.04E+01 I-131 <2.72E+01 0.00E+00 2.72E+01 Cs-134 <7.00E+00 0.00E+00 7.00E+00 Cs-137 1.02E+01 5.68E+00 8.21E+00 Be-7 <7.32E+01 0.00E+00 7.32E+01 K-40 3.73E+03 1.39E+02 7.81E+01 Ag-110M <8.44E+00 0.00E+00 8.44E+00 Sb-122 <5.38E+02 0.00E+00 5.38E+02 Sb-125 <1.80E+01 0.00E+00 1.80E+01 Sample ID: 287053 Sample Dates: 4/16/2014 - 4/16/2014 BOTMFEEDER Nuclide Activity Sigma Error 1 LLD Mn-54 <1.42E+01 0.00E+00 1.42E+01 Co-58 <1.56E+01 0.00E+00 1.56E+01 Fe-59 <3.87E+01 0.00E+00 3.87E+01 Co-60 <2.42E+01 0.00E+00 2.42E+01 Zn-65 <3.89E+01 0.00E+00 3.89E+01 Nb-95 <2.04E+01 0.00E+00 2.04E+01 I-131 <1.95E+01 0.00E+00 1.95E+01 Cs-134 <1.72E+01 0.00E+00 1.72E+01 Cs-137 <2.16E+01 0.00E+00 2.16E+01 Be-7 <9.56E+01 0.00E+00 9.56E+01 K-40 3.40E+03 2.44E+02 2.05E+02 Ag-110M <1.88E+01 0.00E+00 1.88E+01 Sb-122 <8.02E+01 0.00E+00 8.02E+01 Sb-125 <4.46E+01 0.00E+00 4.46E+01 Sample ID: 359064 Sample Dates: 10/13/2014 - 10/13/2014 FREESWIM Nuclide Activity Sigma Error 1 LLD Mn-54 <6.65E+00 0.00E+00 6.65E+00 Co-58 <6.70E+00 0.00E+00 6.70E+00 Fe-59 <1.81E+01 0.00E+00 1.81E+01 Co-60 <1.16E+01 0.00E+00 1.16E+01 Zn-65 <1.99E+01 0.00E+00 1.99E+01 Nb-95 <9.61E+00 0.00E+00 9.61E+00 I-131 <1.46E+01 0.00E+00 1.46E+01 Cs-134 <8.66E+00 0.00E+00 8.66E+00 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 58 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

Media Type: FISH Concentration (Activity): pCi/kg wet Sample Point 060 [ INDICATOR - NE @ 3.23 miles ]

Sample ID: 359064 Sample Dates: 10/13/2014 - 10/13/2014 FREESWIM Nuclide Activity Sigma Error 1 LLD Cs-137 7.44E+00 6.35E+00 1.00E+01 Be-7 <6.63E+01 0.00E+00 6.63E+01 K-40 3.24E+03 3.58E+02 1.08E+02 Ag-110M <6.93E+00 0.00E+00 6.93E+00 Sb-122 <7.24E+01 0.00E+00 7.24E+01 Sb-125 <1.95E+01 0.00E+00 1.95E+01 Sample ID: 359065 Sample Dates: 10/13/2014 - 10/13/2014 BOTMFEEDER Nuclide Activity Sigma Error 1 LLD Mn-54 <1.72E+01 0.00E+00 1.72E+01 Co-58 <1.43E+01 0.00E+00 1.43E+01 Fe-59 <3.49E+01 0.00E+00 3.49E+01 Co-60 <2.18E+01 0.00E+00 2.18E+01 Zn-65 <3.27E+01 0.00E+00 3.27E+01 Nb-95 <1.70E+01 0.00E+00 1.70E+01 I-131 <2.03E+01 0.00E+00 2.03E+01 Cs-134 <2.03E+01 0.00E+00 2.03E+01 Cs-137 <1.77E+01 0.00E+00 1.77E+01 Be-7 <1.06E+02 0.00E+00 1.06E+02 K-40 2.76E+03 4.90E+02 2.58E+02 Ag-110M <1.42E+01 0.00E+00 1.42E+01 Sb-122 <4.11E+01 0.00E+00 4.11E+01 Sb-125 <4.16E+01 0.00E+00 4.16E+01 Sample Point 063 [ INDICATOR - ESE @ 0.8 miles ]

Sample ID: 287054 Sample Dates: 4/14/2014 - 4/14/2014 BOTMFEEDER Nuclide Activity Sigma Error 1 LLD Mn-54 <1.41E+01 0.00E+00 1.41E+01 Co-58 <1.46E+01 0.00E+00 1.46E+01 Fe-59 <3.07E+01 0.00E+00 3.07E+01 Co-60 <1.68E+01 0.00E+00 1.68E+01 Zn-65 <2.87E+01 0.00E+00 2.87E+01 Nb-95 <1.41E+01 0.00E+00 1.41E+01 I-131 <2.10E+01 0.00E+00 2.10E+01 Cs-134 <1.20E+01 0.00E+00 1.20E+01 Cs-137 1.77E+01 5.68E+00 1.31E+01 Be-7 <1.09E+02 0.00E+00 1.09E+02 K-40 3.64E+03 1.55E+02 1.21E+02 Ag-110M <1.08E+01 0.00E+00 1.08E+01 Sb-122 <1.33E+02 0.00E+00 1.33E+02 Sb-125 <2.87E+01 0.00E+00 2.87E+01 Sample ID: 287057 Sample Dates: 4/14/2014 - 4/14/2014 FREESWIM Nuclide Activity Sigma Error 1 LLD Mn-54 <1.23E+01 0.00E+00 1.23E+01 Co-58 <1.23E+01 0.00E+00 1.23E+01 Fe-59 <2.71E+01 0.00E+00 2.71E+01 Co-60 <1.59E+01 0.00E+00 1.59E+01 Zn-65 <3.51E+01 0.00E+00 3.51E+01 Nb-95 <1.39E+01 0.00E+00 1.39E+01 I-131 <2.09E+01 0.00E+00 2.09E+01 Cs-134 <1.11E+01 0.00E+00 1.11E+01 Cs-137 <1.75E+01 0.00E+00 1.75E+01 Be-7 <9.73E+01 0.00E+00 9.73E+01 K-40 3.77E+03 1.73E+02 9.72E+01 Ag-110M <1.16E+01 0.00E+00 1.16E+01 Sb-122 <1.27E+02 0.00E+00 1.27E+02 Sb-125 <2.77E+01 0.00E+00 2.77E+01 Sample ID: 359066 Sample Dates: 10/15/2014 - 10/15/2014 FREESWIM Nuclide Activity Sigma Error 1 LLD Mn-54 <4.88E+00 0.00E+00 4.88E+00 Co-58 <5.81E+00 0.00E+00 5.81E+00 Fe-59 <1.35E+01 0.00E+00 1.35E+01 Co-60 <5.57E+00 0.00E+00 5.57E+00 Zn-65 <1.43E+01 0.00E+00 1.43E+01 Nb-95 <7.13E+00 0.00E+00 7.13E+00 I-131 <1.17E+01 0.00E+00 1.17E+01 Cs-134 <6.57E+00 0.00E+00 6.57E+00 Cs-137 1.02E+01 4.75E+00 6.88E+00 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 59 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 359066 Sample Dates: 10/15/2014 - 10/15/2014 FREESWIM Nuclide Activity Sigma Error 1 LLD Be-7 <4.14E+01 0.00E+00 4.14E+01 K-40 3.11E+03 3.14E+02 6.77E+01 Ag-110M <4.74E+00 0.00E+00 4.74E+00 Sb-122 <1.11E+02 0.00E+00 1.11E+02 Sb-125 <1.25E+01 0.00E+00 1.25E+01 Sample ID: 359070 Sample Dates: 10/15/2014 - 10/22/2014 BOTMFEEDER Nuclide Activity Sigma Error 1 LLD Mn-54 <7.29E+00 0.00E+00 7.29E+00 Co-58 <3.85E+01 0.00E+00 3.85E+01 Fe-59 <6.83E+01 0.00E+00 6.83E+01 Co-60 <4.70E+01 0.00E+00 4.70E+01 Zn-65 <5.04E+01 0.00E+00 5.04E+01 Nb-95 <3.26E+01 0.00E+00 3.26E+01 I-131 <3.29E+01 0.00E+00 3.29E+01 Cs-134 <4.78E+01 0.00E+00 4.78E+01 Cs-137 <4.51E+01 0.00E+00 4.51E+01 Be-7 <2.44E+02 0.00E+00 2.44E+02 K-40 3.49E+03 8.45E+02 5.66E+02 Ag-110M <3.68E+01 0.00E+00 3.68E+01 Sb-122 <9.12E+01 0.00E+00 9.12E+01 Sb-125 <7.49E+01 0.00E+00 7.49E+01 Sample Point 067 [ INDICATOR - SSE @ 4.34 miles ]

Sample ID: 287055 Sample Dates: 4/14/2014 - 4/14/2014 BOTMFEEDER Nuclide Activity Sigma Error 1 LLD Mn-54 <2.52E+01 0.00E+00 2.52E+01 Co-58 <2.13E+01 0.00E+00 2.13E+01 Fe-59 <4.94E+01 0.00E+00 4.94E+01 Co-60 <2.34E+01 0.00E+00 2.34E+01 Zn-65 <4.26E+01 0.00E+00 4.26E+01 Nb-95 <2.67E+01 0.00E+00 2.67E+01 I-131 <3.29E+01 0.00E+00 3.29E+01 Cs-134 <1.67E+01 0.00E+00 1.67E+01 Cs-137 <2.32E+01 0.00E+00 2.32E+01 Be-7 <1.49E+02 0.00E+00 1.49E+02 K-40 3.50E+03 2.52E+02 1.87E+02 Ag-110M <1.86E+01 0.00E+00 1.86E+01 Sb-122 <1.92E+02 0.00E+00 1.92E+02 Sb-125 <4.80E+01 0.00E+00 4.80E+01 Sample ID: 287058 Sample Dates: 4/14/2014 - 4/14/2014 FREESWIM Nuclide Activity Sigma Error 1 LLD Mn-54 <1.18E+01 0.00E+00 1.18E+01 Co-58 <1.28E+01 0.00E+00 1.28E+01 Fe-59 <3.37E+01 0.00E+00 3.37E+01 Co-60 <1.68E+01 0.00E+00 1.68E+01 Zn-65 <3.56E+01 0.00E+00 3.56E+01 Nb-95 <1.60E+01 0.00E+00 1.60E+01 I-131 <1.72E+01 0.00E+00 1.72E+01 Cs-134 <1.29E+01 0.00E+00 1.29E+01 Cs-137 <1.83E+01 0.00E+00 1.83E+01 Be-7 <1.08E+02 0.00E+00 1.08E+02 K-40 3.91E+03 2.04E+02 1.36E+02 Ag-110M <1.33E+01 0.00E+00 1.33E+01 Sb-122 <6.60E+01 0.00E+00 6.60E+01 Sb-125 <2.87E+01 0.00E+00 2.87E+01 Sample ID: 359068 Sample Dates: 10/13/2014 - 10/13/2014 FREESWIM Nuclide Activity Sigma Error 1 LLD Mn-54 <1.32E+01 0.00E+00 1.32E+01 Co-58 <1.47E+01 0.00E+00 1.47E+01 Fe-59 <3.17E+01 0.00E+00 3.17E+01 Co-60 <1.76E+01 0.00E+00 1.76E+01 Zn-65 <3.49E+01 0.00E+00 3.49E+01 Nb-95 <1.30E+01 0.00E+00 1.30E+01 I-131 <1.55E+01 0.00E+00 1.55E+01 Cs-134 <1.48E+01 0.00E+00 1.48E+01 Cs-137 <1.92E+01 0.00E+00 1.92E+01 Be-7 <8.02E+01 0.00E+00 8.02E+01 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 60 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 359068 Sample Dates: 10/13/2014 - 10/13/2014 FREESWIM Nuclide Activity Sigma Error 1 LLD K-40 2.95E+03 4.68E+02 2.18E+02 Ag-110M <1.08E+01 0.00E+00 1.08E+01 Sb-122 <2.79E+01 0.00E+00 2.79E+01 Sb-125 <3.47E+01 0.00E+00 3.47E+01 Sample ID: 359069 Sample Dates: 10/13/2014 - 10/13/2014 BOTMFEEDER Nuclide Activity Sigma Error 1 LLD Mn-54 <1.52E+01 0.00E+00 1.52E+01 Co-58 <1.52E+01 0.00E+00 1.52E+01 Fe-59 <3.50E+01 0.00E+00 3.50E+01 Co-60 <2.46E+01 0.00E+00 2.46E+01 Zn-65 <5.04E+01 0.00E+00 5.04E+01 Nb-95 <1.66E+01 0.00E+00 1.66E+01 I-131 <2.33E+01 0.00E+00 2.33E+01 Cs-134 <2.23E+01 0.00E+00 2.23E+01 Cs-137 <2.90E+01 0.00E+00 2.90E+01 Be-7 <1.79E+02 0.00E+00 1.79E+02 K-40 1.94E+03 4.31E+02 5.58E+01 Ag-110M <2.03E+01 0.00E+00 2.03E+01 Sb-122 <4.64E+01 0.00E+00 4.64E+01 Sb-125 <5.05E+01 0.00E+00 5.05E+01 Media Type: MILK Concentration (Activity): pCi/l Sample Point 071 [ CONTROL - SSE @ 10.2 miles ]

Sample ID: 280686 Sample Dates: 1/13/2014 - 1/13/2014 Nuclide Activity Sigma Error 1 LLD Be-7 <3.69E+00 0.00E+00 3.69E+00 K-40 1.31E+01 2.73E+00 4.91E+00 LLI-131 <4.90E-01 0.00E+00 4.90E-01 I-131 <7.91E+00 0.00E+00 7.91E+00 Cs-134 <8.36E+00 0.00E+00 8.36E+00 Cs-137 <9.54E+00 0.00E+00 9.54E+00 BaLa-140 <1.42E+01 0.00E+00 1.42E+01 Be-7 <7.04E+01 0.00E+00 7.04E+01 K-40 1.55E+03 1.19E+02 9.86E+01 Sample ID: 281231 Sample Dates: 1/27/2014 - 1/27/2014 Nuclide Activity Sigma Error 1 LLD Be-7 <3.09E+00 0.00E+00 3.09E+00 K-40 9.14E+00 2.75E+00 3.80E+00 LLI-131 <5.84E-01 0.00E+00 5.84E-01 I-131 <9.31E+00 0.00E+00 9.31E+00 Cs-134 <5.92E+00 0.00E+00 5.92E+00 Cs-137 <7.73E+00 0.00E+00 7.73E+00 BaLa-140 <1.07E+01 0.00E+00 1.07E+01 Be-7 <6.54E+01 0.00E+00 6.54E+01 K-40 1.41E+03 1.16E+02 9.44E+01 Sample ID: 283421 Sample Dates: 2/10/2014 - 2/10/2014 Nuclide Activity Sigma Error 1 LLD Be-7 <4.63E+00 0.00E+00 4.63E+00 K-40 1.56E+01 4.03E+00 8.23E+00 LLI-131 <6.04E-01 0.00E+00 6.04E-01 I-131 <7.35E+00 0.00E+00 7.35E+00 Cs-134 <8.61E+00 0.00E+00 8.61E+00 Cs-137 <1.00E+01 0.00E+00 1.00E+01 BaLa-140 <8.28E+00 0.00E+00 8.28E+00 Be-7 <6.60E+01 0.00E+00 6.60E+01 K-40 1.44E+03 1.24E+02 1.10E+02 Sample ID: 282162 Sample Dates: 2/24/2014 - 2/24/2014 Nuclide Activity Sigma Error 1 LLD Be-7 <5.16E+00 0.00E+00 5.16E+00 K-40 1.60E+01 3.73E+00 7.09E+00 LLI-131 <6.42E-01 0.00E+00 6.42E-01 I-131 <6.50E+00 0.00E+00 6.50E+00 Cs-134 <5.56E+00 0.00E+00 5.56E+00 Cs-137 <5.99E+00 0.00E+00 5.99E+00 BaLa-140 <6.23E+00 0.00E+00 6.23E+00 Be-7 <4.67E+01 0.00E+00 4.67E+01 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 61 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 282162 Sample Dates: 2/24/2014 - 2/24/2014 Nuclide Activity Sigma Error 1 LLD K-40 1.55E+03 8.27E+01 4.85E+01 Sample ID: 285153 Sample Dates: 3/10/2014 - 3/10/2014 Nuclide Activity Sigma Error 1 LLD Be-7 1.74E+00 1.20E+00 3.19E+00 K-40 4.63E+01 4.31E+00 4.53E+00 LLI-131 <6.37E-01 0.00E+00 6.37E-01 I-131 <8.75E+00 0.00E+00 8.75E+00 Cs-134 <5.71E+00 0.00E+00 5.71E+00 Cs-137 <8.65E+00 0.00E+00 8.65E+00 BaLa-140 <9.66E+00 0.00E+00 9.66E+00 Be-7 4.28E+01 2.06E+01 5.04E+01 K-40 1.54E+03 1.12E+02 8.79E+01 Sample ID: 286262 Sample Dates: 3/24/2014 - 3/24/2014 Nuclide Activity Sigma Error 1 LLD Be-7 <3.21E+00 0.00E+00 3.21E+00 K-40 9.36E+00 2.71E+00 4.37E+00 LLI-131 <6.37E-01 0.00E+00 6.37E-01 I-131 <6.01E+00 0.00E+00 6.01E+00 Cs-134 <6.03E+00 0.00E+00 6.03E+00 Cs-137 <7.35E+00 0.00E+00 7.35E+00 BaLa-140 <5.64E+00 0.00E+00 5.64E+00 Be-7 <5.13E+01 0.00E+00 5.13E+01 K-40 1.51E+03 8.15E+01 3.73E+01 Sample ID: 288398 Sample Dates: 4/7/2014 - 4/7/2014 Nuclide Activity Sigma Error 1 LLD Be-7 <4.00E+00 0.00E+00 4.00E+00 K-40 1.25E+01 3.18E+00 3.32E+00 LLI-131 <6.04E-01 0.00E+00 6.04E-01 I-131 <8.11E+00 0.00E+00 8.11E+00 Cs-134 <7.16E+00 0.00E+00 7.16E+00 Cs-137 <8.35E+00 0.00E+00 8.35E+00 BaLa-140 <1.27E+01 0.00E+00 1.27E+01 Be-7 <6.58E+01 0.00E+00 6.58E+01 K-40 1.43E+03 1.20E+02 9.65E+01 Sample ID: 289505 Sample Dates: 4/21/2014 - 4/21/2014 Nuclide Activity Sigma Error 1 LLD Be-7 <2.56E+00 0.00E+00 2.56E+00 K-40 2.21E+01 3.09E+00 3.75E+00 LLI-131 <5.14E-01 0.00E+00 5.14E-01 I-131 <8.59E+00 0.00E+00 8.59E+00 Cs-134 <6.84E+00 0.00E+00 6.84E+00 Cs-137 <1.04E+01 0.00E+00 1.04E+01 BaLa-140 <1.00E+01 0.00E+00 1.00E+01 Be-7 <6.45E+01 0.00E+00 6.45E+01 K-40 1.41E+03 1.06E+02 2.18E+01 Sample ID: 291520 Sample Dates: 5/5/2014 - 5/5/2014 Nuclide Activity Sigma Error 1 LLD Be-7 <3.68E+00 0.00E+00 3.68E+00 K-40 1.57E+01 3.22E+00 5.18E+00 LLI-131 <6.08E-01 0.00E+00 6.08E-01 I-131 <9.00E+00 0.00E+00 9.00E+00 Cs-134 <6.67E+00 0.00E+00 6.67E+00 Cs-137 <9.70E+00 0.00E+00 9.70E+00 BaLa-140 <1.05E+01 0.00E+00 1.05E+01 Be-7 <6.58E+01 0.00E+00 6.58E+01 K-40 1.55E+03 1.22E+02 9.99E+01 Sample ID: 293076 Sample Dates: 5/19/2014 - 5/19/2014 Nuclide Activity Sigma Error 1 LLD Be-7 <3.41E+00 0.00E+00 3.41E+00 K-40 2.10E+01 4.55E+00 6.75E+00 LLI-131 <5.86E-01 0.00E+00 5.86E-01 I-131 <8.92E+00 0.00E+00 8.92E+00 Cs-134 <9.04E+00 0.00E+00 9.04E+00 Cs-137 <1.12E+01 0.00E+00 1.12E+01 BaLa-140 <1.05E+01 0.00E+00 1.05E+01 Be-7 <8.59E+01 0.00E+00 8.59E+01 K-40 1.50E+03 1.15E+02 9.10E+01 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 62 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 295230 Sample Dates: 6/2/2014 - 6/2/2014 Nuclide Activity Sigma Error 1 LLD Be-7 <3.50E+00 0.00E+00 3.50E+00 K-40 1.31E+01 2.61E+00 4.55E+00 LLI-131 <6.06E-01 0.00E+00 6.06E-01 I-131 <7.83E+00 0.00E+00 7.83E+00 Cs-134 <6.19E+00 0.00E+00 6.19E+00 Cs-137 <7.81E+00 0.00E+00 7.81E+00 BaLa-140 <5.94E+00 0.00E+00 5.94E+00 Be-7 <5.05E+01 0.00E+00 5.05E+01 K-40 1.60E+03 9.00E+01 8.43E+01 Sample ID: 295992 Sample Dates: 6/16/2014 - 6/16/2014 Nuclide Activity Sigma Error 1 LLD Be-7 <4.06E+00 0.00E+00 4.06E+00 K-40 1.12E+01 3.16E+00 6.86E+00 LLI-131 <5.85E-01 0.00E+00 5.85E-01 I-131 <6.94E+00 0.00E+00 6.94E+00 Cs-134 <9.17E+00 0.00E+00 9.17E+00 Cs-137 <1.05E+01 0.00E+00 1.05E+01 BaLa-140 <1.22E+01 0.00E+00 1.22E+01 Be-7 <6.27E+01 0.00E+00 6.27E+01 K-40 1.45E+03 1.18E+02 9.55E+01 Sample ID: 296758 Sample Dates: 6/30/2014 - 6/30/2014 Nuclide Activity Sigma Error 1 LLD Be-7 <3.44E+00 0.00E+00 3.44E+00 K-40 1.10E+01 3.05E+00 4.52E+00 LLI-131 <6.41E-01 0.00E+00 6.41E-01 I-131 <9.07E+00 0.00E+00 9.07E+00 Cs-134 <9.76E+00 0.00E+00 9.76E+00 Cs-137 <1.08E+01 0.00E+00 1.08E+01 BaLa-140 <3.05E+00 0.00E+00 3.05E+00 Be-7 <6.16E+01 0.00E+00 6.16E+01 K-40 1.39E+03 1.15E+02 1.03E+02 Sample ID: 297385 Sample Dates: 7/14/2014 - 7/14/2014 Nuclide Activity Sigma Error 1 LLD LLI-131 <6.13E-01 0.00E+00 6.13E-01 I-131 <3.18E+01 0.00E+00 3.18E+01 Cs-134 <1.12E+01 0.00E+00 1.12E+01 Cs-137 <1.37E+01 0.00E+00 1.37E+01 BaLa-140 <1.00E+01 0.00E+00 1.00E+01 Be-7 <1.18E+02 0.00E+00 1.18E+02 K-40 1.56E+03 3.64E+02 5.04E+01 Sample ID: 350680 Sample Dates: 7/28/2014 - 7/28/2014 Nuclide Activity Sigma Error 1 LLD LLI-131 <6.50E-01 0.00E+00 6.50E-01 I-131 <5.82E+00 0.00E+00 5.82E+00 Cs-134 <6.16E+00 0.00E+00 6.16E+00 Cs-137 <6.54E+00 0.00E+00 6.54E+00 BaLa-140 <1.10E+01 0.00E+00 1.10E+01 Be-7 <4.52E+01 0.00E+00 4.52E+01 K-40 1.40E+03 2.22E+02 1.26E+02 Sample ID: 351626 Sample Dates: 8/11/2014 - 8/11/2014 Nuclide Activity Sigma Error 1 LLD LLI-131 <6.26E-01 0.00E+00 6.26E-01 I-131 <9.39E+00 0.00E+00 9.39E+00 Cs-134 <7.92E+00 0.00E+00 7.92E+00 Cs-137 <1.26E+01 0.00E+00 1.26E+01 BaLa-140 <1.19E+01 0.00E+00 1.19E+01 Be-7 <8.99E+01 0.00E+00 8.99E+01 K-40 1.52E+03 2.57E+02 2.25E+01 Sample ID: 354079 Sample Dates: 8/25/2014 - 8/25/2014 Nuclide Activity Sigma Error 1 LLD LLI-131 <6.45E-01 0.00E+00 6.45E-01 I-131 <9.84E+00 0.00E+00 9.84E+00 Cs-134 <9.54E+00 0.00E+00 9.54E+00 Cs-137 <1.04E+01 0.00E+00 1.04E+01 BaLa-140 <8.09E+00 0.00E+00 8.09E+00 Be-7 <5.93E+01 0.00E+00 5.93E+01 K-40 1.02E+03 2.06E+02 1.17E+02 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 63 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 354772 Sample Dates: 9/8/2014 - 9/8/2014 Nuclide Activity Sigma Error 1 LLD LLI-131 <6.43E-01 0.00E+00 6.43E-01 I-131 <9.81E+00 0.00E+00 9.81E+00 Cs-134 <1.07E+01 0.00E+00 1.07E+01 Cs-137 <8.92E+00 0.00E+00 8.92E+00 BaLa-140 <8.08E+00 0.00E+00 8.08E+00 Be-7 <6.58E+01 0.00E+00 6.58E+01 K-40 1.74E+03 2.83E+02 1.05E+02 Sample ID: 355650 Sample Dates: 9/22/2014 - 9/22/2014 Nuclide Activity Sigma Error 1 LLD LLI-131 <5.75E-01 0.00E+00 5.75E-01 I-131 <7.63E+00 0.00E+00 7.63E+00 Cs-134 <8.97E+00 0.00E+00 8.97E+00 Cs-137 <9.62E+00 0.00E+00 9.62E+00 BaLa-140 <7.79E+00 0.00E+00 7.79E+00 Be-7 <7.36E+01 0.00E+00 7.36E+01 K-40 1.45E+03 2.49E+02 2.25E+01 Sample ID: 357063 Sample Dates: 10/6/2014 - 10/6/2014 Nuclide Activity Sigma Error 1 LLD LLI-131 <6.49E-01 0.00E+00 6.49E-01 I-131 <1.04E+01 0.00E+00 1.04E+01 Cs-134 <1.02E+01 0.00E+00 1.02E+01 Cs-137 <1.08E+01 0.00E+00 1.08E+01 BaLa-140 <3.02E+00 0.00E+00 3.02E+00 Be-7 <5.95E+01 0.00E+00 5.95E+01 K-40 1.47E+03 2.55E+02 9.68E+01 Sample ID: 358666 Sample Dates: 10/20/2014 - 10/20/2014 Nuclide Activity Sigma Error 1 LLD LLI-131 <5.43E-01 0.00E+00 5.43E-01 I-131 <7.17E+00 0.00E+00 7.17E+00 Cs-134 <9.25E+00 0.00E+00 9.25E+00 Cs-137 <8.17E+00 0.00E+00 8.17E+00 BaLa-140 <2.42E+00 0.00E+00 2.42E+00 Be-7 <5.49E+01 0.00E+00 5.49E+01 K-40 1.47E+03 2.42E+02 1.31E+02 Sample ID: 360044 Sample Dates: 11/3/2014 - 11/3/2014 Nuclide Activity Sigma Error 1 LLD LLI-131 <6.29E-01 0.00E+00 6.29E-01 I-131 <8.16E+00 0.00E+00 8.16E+00 Cs-134 <8.33E+00 0.00E+00 8.33E+00 Cs-137 <8.54E+00 0.00E+00 8.54E+00 BaLa-140 <7.93E+00 0.00E+00 7.93E+00 Be-7 <5.68E+01 0.00E+00 5.68E+01 K-40 1.56E+03 2.42E+02 1.83E+01 Sample ID: 361584 Sample Dates: 11/17/2014 - 11/17/2014 Nuclide Activity Sigma Error 1 LLD LLI-131 <5.88E-01 0.00E+00 5.88E-01 I-131 <7.14E+00 0.00E+00 7.14E+00 Cs-134 <1.17E+01 0.00E+00 1.17E+01 Cs-137 <1.04E+01 0.00E+00 1.04E+01 BaLa-140 <8.22E+00 0.00E+00 8.22E+00 Be-7 <7.25E+01 0.00E+00 7.25E+01 K-40 1.49E+03 2.70E+02 1.60E+02 Sample ID: 362797 Sample Dates: 12/1/2014 - 12/1/2014 Nuclide Activity Sigma Error 1 LLD LLI-131 <6.16E-01 0.00E+00 6.16E-01 I-131 <1.18E+01 0.00E+00 1.18E+01 Cs-134 <9.54E+00 0.00E+00 9.54E+00 Cs-137 <1.12E+01 0.00E+00 1.12E+01 BaLa-140 <3.02E+00 0.00E+00 3.02E+00 Be-7 <8.22E+01 0.00E+00 8.22E+01 K-40 1.68E+03 2.81E+02 1.33E+02 Sample ID: 363980 Sample Dates: 12/15/2014 - 12/15/2014 Nuclide Activity Sigma Error 1 LLD LLI-131 <5.99E-01 0.00E+00 5.99E-01 I-131 <8.85E+00 0.00E+00 8.85E+00 Cs-134 <1.16E+01 0.00E+00 1.16E+01 Cs-137 <7.63E+00 0.00E+00 7.63E+00 BaLa-140 <1.11E+01 0.00E+00 1.11E+01 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 64 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 363980 Sample Dates: 12/15/2014 - 12/15/2014 Nuclide Activity Sigma Error 1 LLD Be-7 <7.62E+01 0.00E+00 7.62E+01 K-40 1.69E+03 2.96E+02 1.53E+02 Sample ID: 364944 Sample Dates: 12/29/2014 - 12/29/2014 Nuclide Activity Sigma Error 1 LLD LLI-131 <5.94E-01 0.00E+00 5.94E-01 I-131 <1.04E+01 0.00E+00 1.04E+01 Cs-134 <1.13E+01 0.00E+00 1.13E+01 Cs-137 <1.07E+01 0.00E+00 1.07E+01 BaLa-140 <1.20E+01 0.00E+00 1.20E+01 Be-7 <6.28E+01 0.00E+00 6.28E+01 K-40 1.32E+03 2.61E+02 1.92E+02 Media Type: SEDIMENT_SHORE Concentration (Activity): pCi/kg Sample Point 063 [ INDICATOR - ESE @ 0.8 miles ]

Sample ID: 287065 Sample Dates: 4/14/2014 - 4/14/2014 Nuclide Activity Sigma Error 1 LLD Mn-54 <2.34E+01 0.00E+00 2.34E+01 Co-58 <1.99E+01 0.00E+00 1.99E+01 Fe-59 <5.20E+01 0.00E+00 5.20E+01 Co-60 <2.29E+01 0.00E+00 2.29E+01 Zn-65 <5.19E+01 0.00E+00 5.19E+01 Zr-95 <3.57E+01 0.00E+00 3.57E+01 Nb-95 <2.24E+01 0.00E+00 2.24E+01 I-131 <3.20E+01 0.00E+00 3.20E+01 Cs-134 <1.72E+01 0.00E+00 1.72E+01 Cs-137 <2.29E+01 0.00E+00 2.29E+01 Be-7 <1.56E+02 0.00E+00 1.56E+02 K-40 2.46E+04 4.47E+02 1.72E+02 Co-57 <1.77E+01 0.00E+00 1.77E+01 Mo-99 <8.68E+02 0.00E+00 8.68E+02 Ag-110M <1.86E+01 0.00E+00 1.86E+01 Sb-122 <1.53E+02 0.00E+00 1.53E+02 Sb-125 <5.19E+01 0.00E+00 5.19E+01 Sample ID: 357260 Sample Dates: 10/6/2014 - 10/6/2014 Nuclide Activity Sigma Error 1 LLD Mn-54 <5.11E+01 0.00E+00 5.11E+01 Co-58 <4.55E+01 0.00E+00 4.55E+01 Fe-59 <1.14E+02 0.00E+00 1.14E+02 Co-60 <4.47E+01 0.00E+00 4.47E+01 Zn-65 <1.30E+02 0.00E+00 1.30E+02 Zr-95 <9.40E+01 0.00E+00 9.40E+01 Nb-95 <5.56E+01 0.00E+00 5.56E+01 I-131 <6.05E+01 0.00E+00 6.05E+01 Cs-134 <6.55E+01 0.00E+00 6.55E+01 Cs-137 <4.56E+01 0.00E+00 4.56E+01 Be-7 <3.55E+02 0.00E+00 3.55E+02 K-40 2.37E+04 2.60E+03 8.34E+02 Co-57 <3.61E+01 0.00E+00 3.61E+01 Mo-99 <2.63E+03 0.00E+00 2.63E+03 Ag-110M <3.45E+01 0.00E+00 3.45E+01 Sb-122 <3.36E+02 0.00E+00 3.36E+02 Sb-125 <1.19E+02 0.00E+00 1.19E+02 Sample Point 067 [ INDICATOR - SSE @ 4.34 miles ]

Sample ID: 287066 Sample Dates: 4/14/2014 - 4/14/2014 Nuclide Activity Sigma Error 1 LLD Mn-54 <3.26E+01 0.00E+00 3.26E+01 Co-58 <3.10E+01 0.00E+00 3.10E+01 Fe-59 <7.30E+01 0.00E+00 7.30E+01 Co-60 <3.83E+01 0.00E+00 3.83E+01 Zn-65 <7.22E+01 0.00E+00 7.22E+01 Zr-95 <6.60E+01 0.00E+00 6.60E+01 Nb-95 <3.58E+01 0.00E+00 3.58E+01 I-131 <4.77E+01 0.00E+00 4.77E+01 Cs-134 <2.85E+01 0.00E+00 2.85E+01 Cs-137 <3.94E+01 0.00E+00 3.94E+01 Be-7 3.70E+02 1.23E+02 2.62E+02 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 65 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 287066 Sample Dates: 4/14/2014 - 4/14/2014 Nuclide Activity Sigma Error 1 LLD K-40 9.81E+03 4.26E+02 3.00E+02 Co-57 <2.19E+01 0.00E+00 2.19E+01 Mo-99 <1.54E+03 0.00E+00 1.54E+03 Ag-110M <2.91E+01 0.00E+00 2.91E+01 Sb-122 <2.55E+02 0.00E+00 2.55E+02 Sb-125 <6.88E+01 0.00E+00 6.88E+01 Sample ID: 357261 Sample Dates: 10/6/2014 - 10/6/2014 Nuclide Activity Sigma Error 1 LLD Mn-54 <9.94E+00 0.00E+00 9.94E+00 Co-58 <9.32E+00 0.00E+00 9.32E+00 Fe-59 <2.08E+01 0.00E+00 2.08E+01 Co-60 <8.87E+00 0.00E+00 8.87E+00 Zn-65 <2.01E+01 0.00E+00 2.01E+01 Zr-95 <1.86E+01 0.00E+00 1.86E+01 Nb-95 <1.23E+01 0.00E+00 1.23E+01 I-131 <2.29E+01 0.00E+00 2.29E+01 Cs-134 <1.37E+01 0.00E+00 1.37E+01 Cs-137 2.11E+01 1.18E+01 1.88E+01 Be-7 1.27E+02 7.04E+01 1.12E+02 K-40 1.34E+04 1.16E+03 1.19E+02 Co-57 <7.98E+00 0.00E+00 7.98E+00 Mo-99 <2.38E+03 0.00E+00 2.38E+03 Ag-110M <7.13E+00 0.00E+00 7.13E+00 Sb-122 <3.40E+02 0.00E+00 3.40E+02 Sb-125 <1.98E+01 0.00E+00 1.98E+01 Sample Point 068 [ CONTROL - W @ 1.82 miles ]

Sample ID: 287067 Sample Dates: 4/14/2014 - 4/14/2014 Nuclide Activity Sigma Error 1 LLD Mn-54 <2.20E+01 0.00E+00 2.20E+01 Co-58 <2.00E+01 0.00E+00 2.00E+01 Fe-59 <5.01E+01 0.00E+00 5.01E+01 Co-60 <2.36E+01 0.00E+00 2.36E+01 Zn-65 <5.39E+01 0.00E+00 5.39E+01 Zr-95 <3.81E+01 0.00E+00 3.81E+01 Nb-95 <2.18E+01 0.00E+00 2.18E+01 I-131 <2.72E+01 0.00E+00 2.72E+01 Cs-134 <1.48E+01 0.00E+00 1.48E+01 Cs-137 <1.74E+01 0.00E+00 1.74E+01 Be-7 2.54E+02 7.88E+01 1.76E+02 K-40 8.00E+03 3.43E+02 1.46E+02 Co-57 <1.49E+01 0.00E+00 1.49E+01 Mo-99 <9.75E+02 0.00E+00 9.75E+02 Ag-110M <2.07E+01 0.00E+00 2.07E+01 Sb-122 <1.40E+02 0.00E+00 1.40E+02 Sb-125 <4.52E+01 0.00E+00 4.52E+01 Sample ID: 357262 Sample Dates: 10/6/2014 - 10/6/2014 Nuclide Activity Sigma Error 1 LLD Mn-54 <3.28E+01 0.00E+00 3.28E+01 Co-58 <2.55E+01 0.00E+00 2.55E+01 Fe-59 <5.20E+01 0.00E+00 5.20E+01 Co-60 <2.48E+01 0.00E+00 2.48E+01 Zn-65 <5.29E+01 0.00E+00 5.29E+01 Zr-95 <5.60E+01 0.00E+00 5.60E+01 Nb-95 <3.42E+01 0.00E+00 3.42E+01 I-131 <4.30E+01 0.00E+00 4.30E+01 Cs-134 <3.70E+01 0.00E+00 3.70E+01 Cs-137 <2.64E+01 0.00E+00 2.64E+01 Be-7 <2.61E+02 0.00E+00 2.61E+02 K-40 5.50E+03 8.01E+02 4.82E+02 Co-57 <2.37E+01 0.00E+00 2.37E+01 Mo-99 <1.48E+03 0.00E+00 1.48E+03 Ag-110M <2.67E+01 0.00E+00 2.67E+01 Sb-122 <2.50E+02 0.00E+00 2.50E+02 Sb-125 <6.58E+01 0.00E+00 6.58E+01 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 66 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 279023 Sample Dates: 12/9/2013 - 1/6/2014 Nuclide Activity Sigma Error 1 LLD Mn-54 <2.23E+00 0.00E+00 2.23E+00 Co-58 <1.96E+00 0.00E+00 1.96E+00 Fe-59 <4.65E+00 0.00E+00 4.65E+00 Co-60 <2.12E+00 0.00E+00 2.12E+00 Zn-65 <4.26E+00 0.00E+00 4.26E+00 Zr-95 <4.01E+00 0.00E+00 4.01E+00 Nb-95 <2.74E+00 0.00E+00 2.74E+00 I-131 <1.26E+01 0.00E+00 1.26E+01 Cs-134 <1.78E+00 0.00E+00 1.78E+00 Cs-137 <2.12E+00 0.00E+00 2.12E+00 BaLa-140 <6.46E+00 0.00E+00 6.46E+00 Be-7 <2.30E+01 0.00E+00 2.30E+01 K-40 1.71E+02 1.43E+01 1.99E+01 Sample ID: 280869 Sample Dates: 1/6/2014 - 2/3/2014 Nuclide Activity Sigma Error 1 LLD Mn-54 <4.10E+00 0.00E+00 4.10E+00 Co-58 <3.76E+00 0.00E+00 3.76E+00 Fe-59 <8.52E+00 0.00E+00 8.52E+00 Co-60 <5.73E+00 0.00E+00 5.73E+00 Zn-65 <9.67E+00 0.00E+00 9.67E+00 Zr-95 <7.84E+00 0.00E+00 7.84E+00 Nb-95 <5.24E+00 0.00E+00 5.24E+00 I-131 <1.44E+01 0.00E+00 1.44E+01 Cs-134 <3.96E+00 0.00E+00 3.96E+00 Cs-137 <4.43E+00 0.00E+00 4.43E+00 BaLa-140 <8.70E+00 0.00E+00 8.70E+00 Be-7 <4.57E+01 0.00E+00 4.57E+01 K-40 7.57E+01 1.51E+01 3.52E+01 Sample ID: 282984 Sample Dates: 2/3/2014 - 3/3/2014 Nuclide Activity Sigma Error 1 LLD Mn-54 <2.47E+00 0.00E+00 2.47E+00 Co-58 <2.63E+00 0.00E+00 2.63E+00 Fe-59 <6.36E+00 0.00E+00 6.36E+00 Co-60 <2.72E+00 0.00E+00 2.72E+00 Zn-65 <6.04E+00 0.00E+00 6.04E+00 Zr-95 <4.98E+00 0.00E+00 4.98E+00 Nb-95 <3.24E+00 0.00E+00 3.24E+00 I-131 <1.10E+01 0.00E+00 1.10E+01 Cs-134 <2.40E+00 0.00E+00 2.40E+00 Cs-137 <2.54E+00 0.00E+00 2.54E+00 BaLa-140 <6.07E+00 0.00E+00 6.07E+00 Be-7 <2.57E+01 0.00E+00 2.57E+01 K-40 1.95E+02 1.78E+01 2.80E+01 Sample ID: 284709 Sample Dates: 12/9/2013 - 3/3/2014 Nuclide Activity Sigma Error 1 LLD H3SW <2.84E+01 0.00E+00 1.89E+02 Sample ID: 285764 Sample Dates: 3/3/2014 - 3/31/2014 Nuclide Activity Sigma Error 1 LLD Mn-54 <3.35E+00 0.00E+00 3.35E+00 Co-58 <3.46E+00 0.00E+00 3.46E+00 Fe-59 <7.84E+00 0.00E+00 7.84E+00 Co-60 <4.46E+00 0.00E+00 4.46E+00 Zn-65 <5.47E+00 0.00E+00 5.47E+00 Zr-95 <6.73E+00 0.00E+00 6.73E+00 Nb-95 <5.11E+00 0.00E+00 5.11E+00 I-131 <1.38E+01 0.00E+00 1.38E+01 Cs-134 <3.33E+00 0.00E+00 3.33E+00 Cs-137 <3.76E+00 0.00E+00 3.76E+00 BaLa-140 <8.68E+00 0.00E+00 8.68E+00 Be-7 <3.50E+01 0.00E+00 3.50E+01 K-40 5.65E+01 2.03E+01 3.55E+01 Sample ID: 289128 Sample Dates: 3/31/2014 - 4/28/2014 Nuclide Activity Sigma Error 1 LLD Mn-54 <3.58E+00 0.00E+00 3.58E+00 Co-58 <3.23E+00 0.00E+00 3.23E+00 Fe-59 <8.82E+00 0.00E+00 8.82E+00 Co-60 <4.70E+00 0.00E+00 4.70E+00 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 67 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 289128 Sample Dates: 3/31/2014 - 4/28/2014 Nuclide Activity Sigma Error 1 LLD Zn-65 <6.98E+00 0.00E+00 6.98E+00 Zr-95 <7.60E+00 0.00E+00 7.60E+00 Nb-95 <5.19E+00 0.00E+00 5.19E+00 I-131 <1.45E+01 0.00E+00 1.45E+01 Cs-134 <2.84E+00 0.00E+00 2.84E+00 Cs-137 <3.98E+00 0.00E+00 3.98E+00 BaLa-140 <1.07E+01 0.00E+00 1.07E+01 Be-7 <3.35E+01 0.00E+00 3.35E+01 K-40 8.57E+01 1.86E+01 3.77E+01 Sample ID: 292823 Sample Dates: 4/28/2014 - 5/27/2014 Nuclide Activity Sigma Error 1 LLD Mn-54 <1.42E+00 0.00E+00 1.42E+00 Co-58 <1.58E+00 0.00E+00 1.58E+00 Fe-59 <3.91E+00 0.00E+00 3.91E+00 Co-60 <1.70E+00 0.00E+00 1.70E+00 Zn-65 <3.29E+00 0.00E+00 3.29E+00 Zr-95 <3.20E+00 0.00E+00 3.20E+00 Nb-95 <2.15E+00 0.00E+00 2.15E+00 I-131 <1.45E+01 0.00E+00 1.45E+01 Cs-134 <1.40E+00 0.00E+00 1.40E+00 Cs-137 <1.58E+00 0.00E+00 1.58E+00 BaLa-140 <7.31E+00 0.00E+00 7.31E+00 Be-7 <1.61E+01 0.00E+00 1.61E+01 K-40 <2.66E+01 0.00E+00 2.66E+01 Sample ID: 295227 Sample Dates: 3/3/2014 - 5/27/2014 Nuclide Activity Sigma Error 1 LLD H3SW <-1.1E+02 0.00E+00 1.90E+02 Sample ID: 295486 Sample Dates: 5/27/2014 - 6/23/2014 Nuclide Activity Sigma Error 1 LLD Mn-54 <3.72E+00 0.00E+00 3.72E+00 Co-58 <4.05E+00 0.00E+00 4.05E+00 Fe-59 <1.00E+01 0.00E+00 1.00E+01 Co-60 <4.13E+00 0.00E+00 4.13E+00 Zn-65 <9.14E+00 0.00E+00 9.14E+00 Zr-95 <7.22E+00 0.00E+00 7.22E+00 Nb-95 <5.47E+00 0.00E+00 5.47E+00 I-131 <1.43E+01 0.00E+00 1.43E+01 Cs-134 <3.09E+00 0.00E+00 3.09E+00 Cs-137 <4.39E+00 0.00E+00 4.39E+00 BaLa-140 <1.19E+01 0.00E+00 1.19E+01 Be-7 <3.97E+01 0.00E+00 3.97E+01 K-40 1.13E+02 3.10E+01 4.90E+01 Sample ID: 296994 Sample Dates: 6/23/2014 - 7/21/2014 Nuclide Activity Sigma Error 1 LLD Mn-54 <1.60E+00 0.00E+00 1.60E+00 Co-58 <1.80E+00 0.00E+00 1.80E+00 Fe-59 <4.04E+00 0.00E+00 4.04E+00 Co-60 <1.80E+00 0.00E+00 1.80E+00 Zn-65 <3.39E+00 0.00E+00 3.39E+00 Zr-95 <3.20E+00 0.00E+00 3.20E+00 Nb-95 <2.60E+00 0.00E+00 2.60E+00 I-131 <1.19E+01 0.00E+00 1.19E+01 Cs-134 <1.52E+00 0.00E+00 1.52E+00 Cs-137 <1.84E+00 0.00E+00 1.84E+00 BaLa-140 <5.77E+00 0.00E+00 5.77E+00 Be-7 <1.94E+01 0.00E+00 1.94E+01 K-40 1.03E+02 2.22E+01 2.63E+01 Sample ID: 353437 Sample Dates: 7/21/2014 - 8/18/2014 Nuclide Activity Sigma Error 1 LLD Mn-54 <3.00E+00 0.00E+00 3.00E+00 Co-58 <3.21E+00 0.00E+00 3.21E+00 Fe-59 <6.02E+00 0.00E+00 6.02E+00 Co-60 <3.02E+00 0.00E+00 3.02E+00 Zn-65 <5.60E+00 0.00E+00 5.60E+00 Zr-95 <6.58E+00 0.00E+00 6.58E+00 Nb-95 <3.50E+00 0.00E+00 3.50E+00 I-131 <9.94E+00 0.00E+00 9.94E+00 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 68 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 353437 Sample Dates: 7/21/2014 - 8/18/2014 Nuclide Activity Sigma Error 1 LLD Cs-134 <3.27E+00 0.00E+00 3.27E+00 Cs-137 <3.09E+00 0.00E+00 3.09E+00 BaLa-140 <8.94E+00 0.00E+00 8.94E+00 Be-7 <2.57E+01 0.00E+00 2.57E+01 K-40 6.98E+01 6.66E+01 1.08E+02 Sample ID: 354212 Sample Dates: 5/27/2014 - 8/18/2014 Nuclide Activity Sigma Error 1 LLD H3SW <3.83E+01 0.00E+00 1.88E+02 Sample ID: 355186 Sample Dates: 8/18/2014 - 9/15/2014 Nuclide Activity Sigma Error 1 LLD Mn-54 <2.38E+00 0.00E+00 2.38E+00 Co-58 <3.05E+00 0.00E+00 3.05E+00 Fe-59 <6.55E+00 0.00E+00 6.55E+00 Co-60 <3.45E+00 0.00E+00 3.45E+00 Zn-65 <6.34E+00 0.00E+00 6.34E+00 Zr-95 <6.97E+00 0.00E+00 6.97E+00 Nb-95 <3.73E+00 0.00E+00 3.73E+00 I-131 <1.08E+01 0.00E+00 1.08E+01 Cs-134 <3.93E+00 0.00E+00 3.93E+00 Cs-137 <3.24E+00 0.00E+00 3.24E+00 BaLa-140 <7.20E+00 0.00E+00 7.20E+00 Be-7 <2.81E+01 0.00E+00 2.81E+01 K-40 6.74E+01 3.01E+01 3.74E+01 Sample ID: 358058 Sample Dates: 9/15/2014 - 10/13/2014 Nuclide Activity Sigma Error 1 LLD Mn-54 <2.68E+00 0.00E+00 2.68E+00 Co-58 <3.00E+00 0.00E+00 3.00E+00 Fe-59 <7.66E+00 0.00E+00 7.66E+00 Co-60 <3.06E+00 0.00E+00 3.06E+00 Zn-65 <1.27E+00 0.00E+00 1.27E+00 Zr-95 <6.85E+00 0.00E+00 6.85E+00 Nb-95 <5.00E+00 0.00E+00 5.00E+00 I-131 <1.11E+01 0.00E+00 1.11E+01 Cs-134 <3.67E+00 0.00E+00 3.67E+00 Cs-137 <3.20E+00 0.00E+00 3.20E+00 BaLa-140 <8.04E+00 0.00E+00 8.04E+00 Be-7 <1.96E+01 0.00E+00 1.96E+01 K-40 4.05E+01 2.66E+01 3.48E+01 Sample ID: 360722 Sample Dates: 10/13/2014 - 11/10/2014 Nuclide Activity Sigma Error 1 LLD Mn-54 <2.54E+00 0.00E+00 2.54E+00 Co-58 <2.88E+00 0.00E+00 2.88E+00 Fe-59 <5.94E+00 0.00E+00 5.94E+00 Co-60 <2.18E+00 0.00E+00 2.18E+00 Zn-65 <4.80E+00 0.00E+00 4.80E+00 Zr-95 <5.20E+00 0.00E+00 5.20E+00 Nb-95 <3.57E+00 0.00E+00 3.57E+00 I-131 <1.18E+01 0.00E+00 1.18E+01 Cs-134 <2.66E+00 0.00E+00 2.66E+00 Cs-137 <2.34E+00 0.00E+00 2.34E+00 BaLa-140 <7.32E+00 0.00E+00 7.32E+00 Be-7 <2.33E+01 0.00E+00 2.33E+01 K-40 2.04E+02 3.97E+01 4.16E+01 Sample ID: 363533 Sample Dates: 11/10/2014 - 12/8/2014 Nuclide Activity Sigma Error 1 LLD Mn-54 <1.24E+00 0.00E+00 1.24E+00 Co-58 <1.48E+00 0.00E+00 1.48E+00 Fe-59 <3.10E+00 0.00E+00 3.10E+00 Co-60 <1.19E+00 0.00E+00 1.19E+00 Zn-65 <2.57E+00 0.00E+00 2.57E+00 Zr-95 <2.84E+00 0.00E+00 2.84E+00 Nb-95 <2.03E+00 0.00E+00 2.03E+00 I-131 <1.05E+01 0.00E+00 1.05E+01 Cs-134 <1.49E+00 0.00E+00 1.49E+00 Cs-137 <1.14E+00 0.00E+00 1.14E+00 BaLa-140 <4.16E+00 0.00E+00 4.16E+00 Be-7 <1.27E+01 0.00E+00 1.27E+01 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 69 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 363533 Sample Dates: 11/10/2014 - 12/8/2014 Nuclide Activity Sigma Error 1 LLD K-40 1.75E+02 3.21E+01 4.29E+01 Sample ID: 364522 Sample Dates: 8/18/2014 - 12/8/2014 Nuclide Activity Sigma Error 1 LLD H3SW <8.01E+01 0.00E+00 1.90E+02 Sample Point 063.1 [ INDICATOR - E @ 0.79 miles ]

Sample ID: 279024 Sample Dates: 12/9/2013 - 1/6/2014 Nuclide Activity Sigma Error 1 LLD Mn-54 <2.74E+00 0.00E+00 2.74E+00 Co-58 <2.83E+00 0.00E+00 2.83E+00 Fe-59 <5.38E+00 0.00E+00 5.38E+00 Co-60 <2.93E+00 0.00E+00 2.93E+00 Zn-65 <5.38E+00 0.00E+00 5.38E+00 Zr-95 <5.36E+00 0.00E+00 5.36E+00 Nb-95 <4.12E+00 0.00E+00 4.12E+00 I-131 <1.44E+01 0.00E+00 1.44E+01 Cs-134 <2.04E+00 0.00E+00 2.04E+00 Cs-137 <2.67E+00 0.00E+00 2.67E+00 BaLa-140 <8.60E+00 0.00E+00 8.60E+00 Be-7 <2.75E+01 0.00E+00 2.75E+01 K-40 4.86E+01 1.62E+01 2.94E+01 Sample ID: 280870 Sample Dates: 1/6/2014 - 2/3/2014 Nuclide Activity Sigma Error 1 LLD Mn-54 <3.47E+00 0.00E+00 3.47E+00 Co-58 <3.89E+00 0.00E+00 3.89E+00 Fe-59 <8.50E+00 0.00E+00 8.50E+00 Co-60 <3.97E+00 0.00E+00 3.97E+00 Zn-65 <8.32E+00 0.00E+00 8.32E+00 Zr-95 <7.08E+00 0.00E+00 7.08E+00 Nb-95 <4.55E+00 0.00E+00 4.55E+00 I-131 <1.41E+01 0.00E+00 1.41E+01 Cs-134 <3.17E+00 0.00E+00 3.17E+00 Cs-137 <3.72E+00 0.00E+00 3.72E+00 BaLa-140 <7.29E+00 0.00E+00 7.29E+00 Be-7 <3.56E+01 0.00E+00 3.56E+01 K-40 1.36E+02 2.70E+01 3.44E+01 Sample ID: 282985 Sample Dates: 2/3/2014 - 3/3/2014 Nuclide Activity Sigma Error 1 LLD Mn-54 <3.19E+00 0.00E+00 3.19E+00 Co-58 <3.27E+00 0.00E+00 3.27E+00 Fe-59 <6.75E+00 0.00E+00 6.75E+00 Co-60 <3.18E+00 0.00E+00 3.18E+00 Zn-65 <5.85E+00 0.00E+00 5.85E+00 Zr-95 <5.82E+00 0.00E+00 5.82E+00 Nb-95 <4.06E+00 0.00E+00 4.06E+00 I-131 <1.37E+01 0.00E+00 1.37E+01 Cs-134 <2.79E+00 0.00E+00 2.79E+00 Cs-137 <2.93E+00 0.00E+00 2.93E+00 BaLa-140 <6.84E+00 0.00E+00 6.84E+00 Be-7 <3.03E+01 0.00E+00 3.03E+01 K-40 1.64E+02 1.97E+01 2.77E+01 Sample ID: 284710 Sample Dates: 12/9/2013 - 3/3/2014 Nuclide Activity Sigma Error 1 LLD H3SW 2.06E+03 8.57E+01 1.89E+02 Sample ID: 285765 Sample Dates: 3/3/2014 - 3/31/2014 Nuclide Activity Sigma Error 1 LLD Mn-54 <3.65E+00 0.00E+00 3.65E+00 Co-58 <3.40E+00 0.00E+00 3.40E+00 Fe-59 <1.02E+01 0.00E+00 1.02E+01 Co-60 <4.38E+00 0.00E+00 4.38E+00 Zn-65 <7.21E+00 0.00E+00 7.21E+00 Zr-95 <7.52E+00 0.00E+00 7.52E+00 Nb-95 <4.76E+00 0.00E+00 4.76E+00 I-131 <1.41E+01 0.00E+00 1.41E+01 Cs-134 <3.61E+00 0.00E+00 3.61E+00 Cs-137 <3.29E+00 0.00E+00 3.29E+00 BaLa-140 <5.61E+00 0.00E+00 5.61E+00 Be-7 <3.68E+01 0.00E+00 3.68E+01 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 70 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 285765 Sample Dates: 3/3/2014 - 3/31/2014 Nuclide Activity Sigma Error 1 LLD K-40 7.27E+01 1.68E+01 2.94E+01 Sample ID: 289129 Sample Dates: 3/31/2014 - 4/28/2014 Nuclide Activity Sigma Error 1 LLD Mn-54 <3.25E+00 0.00E+00 3.25E+00 Co-58 <3.24E+00 0.00E+00 3.24E+00 Fe-59 <8.64E+00 0.00E+00 8.64E+00 Co-60 <3.95E+00 0.00E+00 3.95E+00 Zn-65 <5.67E+00 0.00E+00 5.67E+00 Zr-95 <5.70E+00 0.00E+00 5.70E+00 Nb-95 <4.61E+00 0.00E+00 4.61E+00 I-131 <1.21E+01 0.00E+00 1.21E+01 Cs-134 <2.73E+00 0.00E+00 2.73E+00 Cs-137 <3.57E+00 0.00E+00 3.57E+00 BaLa-140 <8.93E+00 0.00E+00 8.93E+00 Be-7 <3.13E+01 0.00E+00 3.13E+01 K-40 7.46E+01 1.62E+01 4.03E+01 Sample ID: 292824 Sample Dates: 4/28/2014 - 5/27/2014 Nuclide Activity Sigma Error 1 LLD Mn-54 <2.05E+00 0.00E+00 2.05E+00 Co-58 <2.47E+00 0.00E+00 2.47E+00 Fe-59 <4.42E+00 0.00E+00 4.42E+00 Co-60 <2.26E+00 0.00E+00 2.26E+00 Zn-65 <4.47E+00 0.00E+00 4.47E+00 Zr-95 <4.45E+00 0.00E+00 4.45E+00 Nb-95 <2.75E+00 0.00E+00 2.75E+00 I-131 <1.44E+01 0.00E+00 1.44E+01 Cs-134 <2.04E+00 0.00E+00 2.04E+00 Cs-137 <2.19E+00 0.00E+00 2.19E+00 BaLa-140 <6.10E+00 0.00E+00 6.10E+00 Be-7 <2.39E+01 0.00E+00 2.39E+01 K-40 1.60E+02 1.52E+01 1.74E+01 Sample ID: 295228 Sample Dates: 3/3/2014 - 5/27/2014 Nuclide Activity Sigma Error 1 LLD H3SW 3.53E+03 1.02E+02 1.90E+02 Sample ID: 295487 Sample Dates: 5/27/2014 - 6/23/2014 Nuclide Activity Sigma Error 1 LLD Mn-54 <2.74E+00 0.00E+00 2.74E+00 Co-58 <2.95E+00 0.00E+00 2.95E+00 Fe-59 <7.04E+00 0.00E+00 7.04E+00 Co-60 <3.20E+00 0.00E+00 3.20E+00 Zn-65 <6.67E+00 0.00E+00 6.67E+00 Zr-95 <5.37E+00 0.00E+00 5.37E+00 Nb-95 <3.91E+00 0.00E+00 3.91E+00 I-131 <9.92E+00 0.00E+00 9.92E+00 Cs-134 <2.98E+00 0.00E+00 2.98E+00 Cs-137 <3.32E+00 0.00E+00 3.32E+00 BaLa-140 <9.12E+00 0.00E+00 9.12E+00 Be-7 <3.02E+01 0.00E+00 3.02E+01 K-40 8.42E+01 1.40E+01 2.57E+01 Sample ID: 296995 Sample Dates: 6/23/2014 - 7/21/2014 Nuclide Activity Sigma Error 1 LLD Mn-54 <1.46E+00 0.00E+00 1.46E+00 Co-58 <1.62E+00 0.00E+00 1.62E+00 Fe-59 <3.65E+00 0.00E+00 3.65E+00 Co-60 <1.49E+00 0.00E+00 1.49E+00 Zn-65 <2.85E+00 0.00E+00 2.85E+00 Zr-95 <2.98E+00 0.00E+00 2.98E+00 Nb-95 <2.27E+00 0.00E+00 2.27E+00 I-131 <9.50E+00 0.00E+00 9.50E+00 Cs-134 <1.16E+00 0.00E+00 1.16E+00 Cs-137 <1.45E+00 0.00E+00 1.45E+00 BaLa-140 <5.82E+00 0.00E+00 5.82E+00 Be-7 <1.35E+01 0.00E+00 1.35E+01 K-40 8.76E+01 1.86E+01 2.32E+01 Sample ID: 353438 Sample Dates: 7/21/2014 - 8/18/2014 Nuclide Activity Sigma Error 1 LLD Mn-54 <2.43E+00 0.00E+00 2.43E+00 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 71 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 353438 Sample Dates: 7/21/2014 - 8/18/2014 Nuclide Activity Sigma Error 1 LLD Co-58 <2.61E+00 0.00E+00 2.61E+00 Fe-59 <6.67E+00 0.00E+00 6.67E+00 Co-60 <1.93E+00 0.00E+00 1.93E+00 Zn-65 <5.08E+00 0.00E+00 5.08E+00 Zr-95 <5.51E+00 0.00E+00 5.51E+00 Nb-95 <3.59E+00 0.00E+00 3.59E+00 I-131 <1.19E+01 0.00E+00 1.19E+01 Cs-134 <2.82E+00 0.00E+00 2.82E+00 Cs-137 <2.84E+00 0.00E+00 2.84E+00 BaLa-140 <6.85E+00 0.00E+00 6.85E+00 Be-7 <2.77E+01 0.00E+00 2.77E+01 K-40 8.95E+01 2.54E+01 2.69E+01 Sample ID: 354213 Sample Dates: 5/27/2014 - 8/18/2014 Nuclide Activity Sigma Error 1 LLD H3SW 1.42E+03 1.51E+02 1.88E+02 Sample ID: 355188 Sample Dates: 8/18/2014 - 9/15/2014 Nuclide Activity Sigma Error 1 LLD Mn-54 <3.97E+00 0.00E+00 3.97E+00 Co-58 <3.69E+00 0.00E+00 3.69E+00 Fe-59 <7.42E+00 0.00E+00 7.42E+00 Co-60 <3.76E+00 0.00E+00 3.76E+00 Zn-65 <5.24E+00 0.00E+00 5.24E+00 Zr-95 <6.06E+00 0.00E+00 6.06E+00 Nb-95 <4.69E+00 0.00E+00 4.69E+00 I-131 <1.15E+01 0.00E+00 1.15E+01 Cs-134 <3.94E+00 0.00E+00 3.94E+00 Cs-137 <3.84E+00 0.00E+00 3.84E+00 BaLa-140 <7.08E+00 0.00E+00 7.08E+00 Be-7 <2.85E+01 0.00E+00 2.85E+01 K-40 8.15E+01 3.35E+01 3.54E+01 Sample ID: 358059 Sample Dates: 9/15/2014 - 10/13/2014 Nuclide Activity Sigma Error 1 LLD Mn-54 <2.03E+00 0.00E+00 2.03E+00 Co-58 <1.92E+00 0.00E+00 1.92E+00 Fe-59 <4.58E+00 0.00E+00 4.58E+00 Co-60 <1.64E+00 0.00E+00 1.64E+00 Zn-65 <4.30E+00 0.00E+00 4.30E+00 Zr-95 <4.28E+00 0.00E+00 4.28E+00 Nb-95 <2.88E+00 0.00E+00 2.88E+00 I-131 <1.17E+01 0.00E+00 1.17E+01 Cs-134 <2.38E+00 0.00E+00 2.38E+00 Cs-137 <1.81E+00 0.00E+00 1.81E+00 BaLa-140 <5.84E+00 0.00E+00 5.84E+00 Be-7 <1.92E+01 0.00E+00 1.92E+01 K-40 1.76E+02 3.48E+01 4.14E+01 Sample ID: 360723 Sample Dates: 10/13/2014 - 11/10/2014 Nuclide Activity Sigma Error 1 LLD Mn-54 <2.59E+00 0.00E+00 2.59E+00 Co-58 <2.76E+00 0.00E+00 2.76E+00 Fe-59 <5.51E+00 0.00E+00 5.51E+00 Co-60 <2.80E+00 0.00E+00 2.80E+00 Zn-65 <5.34E+00 0.00E+00 5.34E+00 Zr-95 <4.84E+00 0.00E+00 4.84E+00 Nb-95 <3.51E+00 0.00E+00 3.51E+00 I-131 <1.06E+01 0.00E+00 1.06E+01 Cs-134 <2.93E+00 0.00E+00 2.93E+00 Cs-137 <2.29E+00 0.00E+00 2.29E+00 BaLa-140 <6.38E+00 0.00E+00 6.38E+00 Be-7 <2.14E+01 0.00E+00 2.14E+01 K-40 1.02E+02 2.96E+01 3.76E+01 Sample ID: 363534 Sample Dates: 11/10/2014 - 12/8/2014 Nuclide Activity Sigma Error 1 LLD Mn-54 <1.29E+00 0.00E+00 1.29E+00 Co-58 <1.71E+00 0.00E+00 1.71E+00 Fe-59 <3.11E+00 0.00E+00 3.11E+00 Co-60 <1.21E+00 0.00E+00 1.21E+00 Zn-65 <3.03E+00 0.00E+00 3.03E+00 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 72 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 363534 Sample Dates: 11/10/2014 - 12/8/2014 Nuclide Activity Sigma Error 1 LLD Zr-95 <2.99E+00 0.00E+00 2.99E+00 Nb-95 <2.33E+00 0.00E+00 2.33E+00 I-131 <1.09E+01 0.00E+00 1.09E+01 Cs-134 <1.43E+00 0.00E+00 1.43E+00 Cs-137 <1.54E+00 0.00E+00 1.54E+00 BaLa-140 <5.35E+00 0.00E+00 5.35E+00 Be-7 <1.43E+01 0.00E+00 1.43E+01 K-40 2.96E+01 1.55E+01 2.32E+01 Sample ID: 364523 Sample Dates: 8/18/2014 - 12/8/2014 Nuclide Activity Sigma Error 1 LLD H3SW 6.96E+03 2.61E+02 1.91E+02 Media Type: TLD Concentration (Activity): mR/Standard Quarter Sample Point 020 [ INDICATOR - N @ 0.16 miles ] TLD RING TLD_INNER Sample ID: 286453 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 22.20 Sample ID: 296401 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 17.90 Sample ID: 365635 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 17.60 Sample ID: 362556 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 20.25 Sample Point 021 [ INDICATOR - NNE @ 0.25 miles ] TLD RING TLD_INNER Sample ID: 286454 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 18.44 Sample ID: 296402 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 12.47 Sample ID: 365636 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 13.84 Sample ID: 362557 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 13.18 Sample Point 022 [ INDICATOR - NE @ 0.53 miles ] TLD RING TLD_INNER Sample ID: 286455 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 26.15 Sample ID: 296403 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 21.32 Sample ID: 365637 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 20.91 Sample ID: 362558 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 24.39 Sample Point 023 [ INDICATOR - ENE @ 0.93 miles ] TLD RING TLD_INNER Sample ID: 286456 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 24.68 Sample ID: 296404 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 20.03 Sample ID: 365638 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 20.25 Sample ID: 362559 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 23.45 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 73 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

Media Type: TLD Concentration (Activity): mR/Standard Quarter Sample Point 024 [ INDICATOR - E @ 0.79 miles ] TLD RING TLD_INNER Sample ID: 286457 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 27.46 Sample ID: 296405 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 22.65 Sample ID: 365640 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 23.31 Sample ID: 362560 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 25.48 Sample Point 025 [ INDICATOR - ESE @ 0.42 miles ] TLD RING TLD_INNER Sample ID: 286458 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 22.59 Sample ID: 296406 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 18.03 Sample ID: 365641 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 18.35 Sample ID: 362561 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 21.13 Sample Point 026 [ INDICATOR - SE @ 0.34 miles ] TLD RING TLD_INNER Sample ID: 286460 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 19.59 Sample ID: 296408 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 15.75 Sample ID: 365642 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 16.38 Sample ID: 362562 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 19.32 Sample Point 027 [ INDICATOR - SSE @ 0.49 miles ] TLD RING TLD_INNER Sample ID: 286461 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 22.42 Sample ID: 296409 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 18.32 Sample ID: 365643 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 18.93 Sample ID: 362563 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 19.13 Sample Point 028 [ INDICATOR - S @ 0.46 miles ] TLD RING TLD_INNER Sample ID: 286462 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 18.54 Sample ID: 296410 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 15.46 Sample ID: 365645 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 15.62 Sample ID: 362564 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 19.07 Sample Point 029 [ INDICATOR - SSW @ 0.56 miles ] TLD RING TLD_INNER Sample ID: 286463 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 17.09 Sample ID: 296411 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 15.44 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 74 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

Media Type: TLD Concentration (Activity): mR/Standard Quarter Sample Point 029 [ INDICATOR - SSW @ 0.56 miles ] TLD RING TLD_INNER Sample ID: 365646 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 14.30 Sample ID: 362565 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 15.86 Sample Point 030 [ INDICATOR - SW @ 0.42 miles ] TLD RING TLD_INNER Sample ID: 286464 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 19.09 Sample ID: 296412 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 15.55 Sample ID: 365647 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 16.34 Sample ID: 362566 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 20.73 Sample Point 031 [ INDICATOR - WSW @ 0.27 miles ] TLD RING TLD_INNER Sample ID: 286465 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 19.00 Sample ID: 296413 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 14.18 Sample ID: 365649 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 18.11 Sample ID: 362567 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 17.66 Sample Point 032 [ INDICATOR - WNW @ 0.19 miles ] TLD RING TLD_INNER Sample ID: 286466 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 20.49 Sample ID: 296414 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 16.81 Sample ID: 365650 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 16.52 Sample ID: 362568 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 21.54 Sample Point 033 [ INDICATOR - WNW @ 0.21 miles ] TLD RING TLD_INNER Sample ID: 286467 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 22.33 Sample ID: 296415 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 17.59 Sample ID: 365651 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 17.82 Sample ID: 362569 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 21.95 Sample Point 034 [ INDICATOR - NW @ 0.22 miles ] TLD RING TLD_INNER Sample ID: 286468 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 25.24 Sample ID: 296416 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 21.00 Sample ID: 365652 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 20.77 Sample ID: 362570 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 23.81 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 75 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

Media Type: TLD Concentration (Activity): mR/Standard Quarter Sample Point 035 [ INDICATOR - NNW @ 0.17 miles ] TLD RING TLD_INNER Sample ID: 286469 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 28.03 Sample ID: 296417 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 23.01 Sample ID: 365654 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 23.55 Sample ID: 362571 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 25.50 Sample Point 036 [ INDICATOR - N @ 4.18 miles ] TLD RING TLD_OUTER Sample ID: 286470 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 28.00 Sample ID: 296418 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 21.73 Sample ID: 365655 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 22.95 Sample ID: 362572 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 26.96 Sample Point 037 [ INDICATOR - NNE @ 4.85 miles ] TLD RING TLD_OUTER Sample ID: 286471 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 23.61 Sample ID: 296419 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 16.41 Sample ID: 365656 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 20.77 Sample ID: 362573 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 19.07 Sample Point 038 [ INDICATOR - NE @ 4.24 miles ] TLD RING TLD_OUTER Sample ID: 286472 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 25.48 Sample ID: 296420 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 19.48 Sample ID: 365657 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 19.42 Sample ID: 362574 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 22.73 Sample Point 039 [ INDICATOR - ENE @ 4.02 miles ] TLD RING TLD_OUTER Sample ID: 286473 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 26.70 Sample ID: 296421 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 22.95 Sample ID: 365659 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 22.88 Sample ID: 362575 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 24.42 Sample Point 040 [ INDICATOR - E @ 4.74 miles ] TLD RING TLD_OUTER Sample ID: 286474 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 29.59 Sample ID: 296422 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 24.40 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 76 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

Media Type: TLD Concentration (Activity): mR/Standard Quarter Sample Point 040 [ INDICATOR - E @ 4.74 miles ] TLD RING TLD_OUTER Sample ID: 365660 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 24.56 Sample ID: 362576 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 28.23 Sample Point 041 [ INDICATOR - ESE @ 4.25 miles ] TLD RING TLD_OUTER Sample ID: 286491 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 19.61 Sample ID: 296439 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 15.82 Sample ID: 365662 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 15.16 Sample ID: 362577 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 18.56 Sample Point 042 [ INDICATOR - SE @ 4.93 miles ] TLD RING TLD_OUTER Sample ID: 286475 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 29.20 Sample ID: 296423 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 24.22 Sample ID: 365663 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 24.95 Sample ID: 362578 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 26.92 Sample Point 043 [ INDICATOR - SSE @ 4.09 miles ] TLD RING TLD_OUTER Sample ID: 296424 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 21.81 Sample ID: 365664 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 22.05 Sample ID: 362579 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 25.10 Sample Point 044 [ INDICATOR - S @ 3.96 miles ] TLD RING TLD_OUTER Sample ID: 286477 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 21.76 Sample ID: 296425 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 17.29 Sample ID: 365665 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 18.50 Sample ID: 362580 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 18.76 Sample Point 045 [ INDICATOR - SSW @ 4.78 miles ] TLD RING TLD_OUTER Sample ID: 286478 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 18.48 Sample ID: 296426 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 15.76 Sample ID: 365667 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 15.42 Sample ID: 362581 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 19.72 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 77 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

Media Type: TLD Concentration (Activity): mR/Standard Quarter Sample Point 046 [ INDICATOR - SW @ 4.61 miles ] TLD RING TLD_OUTER Sample ID: 286479 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 25.19 Sample ID: 296427 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 20.99 Sample ID: 365668 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 21.33 Sample ID: 362582 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 22.99 Sample Point 047 [ INDICATOR - WSW @ 3.58 miles ] TLD RING TLD_OUTER Sample ID: 286480 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 26.62 Sample ID: 296428 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 21.39 Sample ID: 365670 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 21.82 Sample ID: 362583 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 23.81 Sample Point 048 [ INDICATOR - W @ 3.64 miles ] TLD RING TLD_OUTER Sample ID: 286481 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 28.32 Sample ID: 296429 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 24.21 Sample ID: 365671 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 27.17 Sample ID: 362584 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 29.24 Sample Point 049 [ INDICATOR - WNW @ 3.6 miles ] TLD RING TLD_OUTER Sample ID: 286482 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 25.43 Sample ID: 296430 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 21.39 Sample ID: 365672 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 22.63 Sample ID: 362585 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 22.92 Sample Point 050 [ INDICATOR - NW @ 3.53 miles ] TLD RING TLD_OUTER Sample ID: 286483 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 20.22 Sample ID: 296431 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 16.02 Sample ID: 365673 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 19.78 Sample ID: 362586 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 19.44 Sample Point 051 [ INDICATOR - NNW @ 4.64 miles ] TLD RING TLD_OUTER Sample ID: 286484 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 20.96 Sample ID: 296432 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 18.53 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 78 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

Media Type: TLD Concentration (Activity): mR/Standard Quarter Sample Point 051 [ INDICATOR - NNW @ 4.64 miles ] TLD RING TLD_OUTER Sample ID: 365675 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 18.55 Sample ID: 362587 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 23.64 Sample Point 052 [ INDICATOR - ENE @ 12.4 miles ] TLD RING TLD_SPEC Sample ID: 286485 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 27.04 Sample ID: 296433 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 22.99 Sample ID: 365676 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 22.37 Sample ID: 362588 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 24.09 Sample Point 053 [ INDICATOR - E @ 11.7 miles ] TLD RING TLD_SPEC Sample ID: 286486 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 29.27 Sample ID: 296434 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 24.19 Sample ID: 365678 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 21.18 Sample ID: 362589 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 26.83 Sample Point 054 [ INDICATOR - ESE @ 8.6 miles ] TLD RING TLD_SPEC Sample ID: 286487 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 24.23 Sample ID: 296435 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 16.80 Sample ID: 365679 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 16.25 Sample ID: 362590 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 21.57 Sample Point 055 [ INDICATOR - SSE @ 9.27 miles ] TLD RING TLD_SPEC Sample ID: 286488 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 19.54 Sample ID: 296436 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 14.07 Sample ID: 365680 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 14.33 Sample ID: 362591 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 15.61 Sample Point 056 [ INDICATOR - SSW @ 7.3 miles ] TLD RING TLD_SPEC Sample ID: 286489 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 25.96 Sample ID: 296437 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 23.45 Sample ID: 365681 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 22.73 Sample ID: 362592 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 24.04 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 79 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

Media Type: TLD Concentration (Activity): mR/Standard Quarter Sample Point 057 [ INDICATOR - SW @ 8.42 miles ] TLD RING TLD_SPEC Sample ID: 286490 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 28.17 Sample ID: 296438 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 21.66 Sample ID: 365683 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 29.42 Sample ID: 362593 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 24.53 Sample Point 058 [ CONTROL - WSW @ 9.39 miles ] TLD RING TLD_CTRL Sample ID: 286492 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 34.90 Sample ID: 296440 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 29.21 Sample ID: 365684 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 28.84 Sample ID: 362594 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 32.08 Sample Point 059 [ INDICATOR - NW @ 9.2 miles ] TLD RING TLD_SPEC Sample ID: 286493 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 27.10 Sample ID: 296441 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 24.53 Sample ID: 365685 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 25.76 Sample ID: 362595 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 25.07 Sample Point 076 [ INDICATOR - W @ 0.19 miles ] TLD RING TLD_INNER Sample ID: 286494 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 27.02 Sample ID: 296442 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 22.16 Sample ID: 365687 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 21.51 Sample ID: 362596 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 21 Sample Point 081 [ CONTROL - SE @ 9.33 miles ] TLD RING TLD_CTRL Sample ID: 286495 Sample Dates: 12/17/2013 - 3/18/2014 Nuclide Activity mR/Std Qtr 25.53 Sample ID: 296443 Sample Dates: 3/18/2014 - 6/17/2014 Nuclide Activity mR/Std Qtr 23.20 Sample ID: 365688 Sample Dates: 6/17/2014 - 9/16/2014 Nuclide Activity mR/Std Qtr 22.17 Sample ID: 362597 Sample Dates: 9/16/2014 - 12/16/2014 Nuclide Activity mR/Std Qtr 24.3 Media Type: VEGETATION Concentration (Activity): pCi/kg wet Sample Point 077 [ INDICATOR - SW @ 1 miles ]

Sample ID: 275257 Sample Dates: 1/6/2014 - 1/6/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD I-131 <3.63E+01 0.00E+00 3.63E+01 Cs-134 <3.17E+01 0.00E+00 3.17E+01 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 80 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 275257 Sample Dates: 1/6/2014 - 1/6/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD Cs-137 <2.43E+01 0.00E+00 2.43E+01 Be-7 2.57E+03 2.47E+02 2.48E+02 K-40 3.86E+03 3.09E+02 2.90E+02 Sample ID: 279583 Sample Dates: 2/3/2014 - 2/3/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD I-131 <3.59E+01 0.00E+00 3.59E+01 Cs-134 <3.90E+01 0.00E+00 3.90E+01 Cs-137 <3.30E+01 0.00E+00 3.30E+01 Be-7 7.27E+02 1.33E+02 2.66E+02 K-40 2.75E+03 3.59E+02 4.91E+02 Sample ID: 281220 Sample Dates: 3/3/2014 - 3/3/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD I-131 <3.74E+01 0.00E+00 3.74E+01 Cs-134 <2.85E+01 0.00E+00 2.85E+01 Cs-137 <3.32E+01 0.00E+00 3.32E+01 Be-7 7.06E+02 1.46E+02 2.90E+02 K-40 3.36E+03 3.30E+02 3.36E+02 Sample ID: 284401 Sample Dates: 4/7/2014 - 4/7/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD I-131 <2.87E+01 0.00E+00 2.87E+01 Cs-134 <4.72E+01 0.00E+00 4.72E+01 Cs-137 <4.66E+01 0.00E+00 4.66E+01 Be-7 1.75E+03 1.95E+02 2.70E+02 K-40 3.57E+03 4.15E+02 5.09E+02 Sample ID: 287038 Sample Dates: 5/5/2014 - 5/5/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD I-131 <2.88E+01 0.00E+00 2.88E+01 Cs-134 <3.57E+01 0.00E+00 3.57E+01 Cs-137 <3.89E+01 0.00E+00 3.89E+01 Be-7 2.56E+02 8.86E+01 2.77E+02 K-40 3.54E+03 3.91E+02 3.11E+02 Sample ID: 289839 Sample Dates: 6/2/2014 - 6/2/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD I-131 <2.50E+01 0.00E+00 2.50E+01 Cs-134 <2.15E+01 0.00E+00 2.15E+01 Cs-137 <3.04E+01 0.00E+00 3.04E+01 Be-7 7.00E+02 1.00E+02 1.69E+02 K-40 3.47E+03 2.74E+02 1.98E+02 Sample ID: 294843 Sample Dates: 7/7/2014 - 7/7/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD Mn-54 <1.72E+01 0.00E+00 1.72E+01 Co-58 <1.89E+01 0.00E+00 1.89E+01 Fe-59 <5.59E+01 0.00E+00 5.59E+01 Co-60 <1.89E+01 0.00E+00 1.89E+01 Zn-65 <5.20E+01 0.00E+00 5.20E+01 Zr-95 <3.08E+01 0.00E+00 3.08E+01 Nb-95 <2.56E+01 0.00E+00 2.56E+01 I-131 <4.78E+01 0.00E+00 4.78E+01 Cs-134 <1.33E+01 0.00E+00 1.33E+01 Cs-137 <1.57E+01 0.00E+00 1.57E+01 BaLa-140 <4.67E+01 0.00E+00 4.67E+01 Be-7 7.25E+02 2.12E+02 2.65E+02 K-40 4.10E+03 5.90E+02 3.03E+02 Sample ID: 296611 Sample Dates: 8/4/2014 - 8/4/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD Mn-54 <3.01E+01 0.00E+00 3.01E+01 Co-58 <3.34E+01 0.00E+00 3.34E+01 Fe-59 <7.77E+01 0.00E+00 7.77E+01 Co-60 <5.92E+01 0.00E+00 5.92E+01 Zn-65 <6.70E+01 0.00E+00 6.70E+01 Zr-95 <5.16E+01 0.00E+00 5.16E+01 Nb-95 <3.79E+01 0.00E+00 3.79E+01 I-131 <3.74E+01 0.00E+00 3.74E+01 Cs-134 <3.22E+01 0.00E+00 3.22E+01 Cs-137 <4.64E+01 0.00E+00 4.64E+01 BaLa-140 <5.33E+01 0.00E+00 5.33E+01 Be-7 1.15E+03 4.08E+02 5.13E+02 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 81 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 296611 Sample Dates: 8/4/2014 - 8/4/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD K-40 3.81E+03 9.01E+02 5.32E+02 Sample ID: 354456 Sample Dates: 9/2/2014 - 9/2/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD Mn-54 <3.43E+01 0.00E+00 3.43E+01 Co-58 <3.84E+01 0.00E+00 3.84E+01 Fe-59 <8.46E+01 0.00E+00 8.46E+01 Co-60 <4.79E+01 0.00E+00 4.79E+01 Zn-65 <8.85E+01 0.00E+00 8.85E+01 Zr-95 <6.96E+01 0.00E+00 6.96E+01 Nb-95 <3.07E+01 0.00E+00 3.07E+01 I-131 <3.49E+01 0.00E+00 3.49E+01 Cs-134 <3.57E+01 0.00E+00 3.57E+01 Cs-137 <3.27E+01 0.00E+00 3.27E+01 BaLa-140 <6.02E+01 0.00E+00 6.02E+01 Be-7 1.84E+03 4.37E+02 4.43E+02 K-40 3.77E+03 8.55E+02 5.54E+02 Sample ID: 357059 Sample Dates: 10/6/2014 - 10/6/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD Mn-54 <2.56E+01 0.00E+00 2.56E+01 Co-58 <2.81E+01 0.00E+00 2.81E+01 Fe-59 <6.46E+01 0.00E+00 6.46E+01 Co-60 <2.99E+01 0.00E+00 2.99E+01 Zn-65 <6.74E+01 0.00E+00 6.74E+01 Zr-95 <4.72E+01 0.00E+00 4.72E+01 Nb-95 <2.81E+01 0.00E+00 2.81E+01 I-131 <2.80E+01 0.00E+00 2.80E+01 Cs-134 <3.50E+01 0.00E+00 3.50E+01 Cs-137 <2.72E+01 0.00E+00 2.72E+01 BaLa-140 <7.34E+00 0.00E+00 7.34E+00 Be-7 2.32E+03 3.84E+02 3.00E+02 K-40 4.56E+03 7.45E+02 4.01E+02 Sample ID: 360040 Sample Dates: 11/3/2014 - 11/3/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD Mn-54 <2.87E+01 0.00E+00 2.87E+01 Co-58 <2.54E+01 0.00E+00 2.54E+01 Fe-59 <5.53E+01 0.00E+00 5.53E+01 Co-60 <2.57E+01 0.00E+00 2.57E+01 Zn-65 <5.61E+01 0.00E+00 5.61E+01 Zr-95 <3.04E+01 0.00E+00 3.04E+01 Nb-95 <2.34E+01 0.00E+00 2.34E+01 I-131 <2.30E+01 0.00E+00 2.30E+01 Cs-134 <3.23E+01 0.00E+00 3.23E+01 Cs-137 <2.38E+01 0.00E+00 2.38E+01 BaLa-140 <2.95E+01 0.00E+00 2.95E+01 Be-7 2.74E+03 4.38E+02 3.30E+02 K-40 2.89E+03 5.69E+02 2.62E+02 Sample ID: 362793 Sample Dates: 12/1/2014 - 12/1/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD Mn-54 <2.25E+01 0.00E+00 2.25E+01 Co-58 <2.76E+01 0.00E+00 2.76E+01 Fe-59 <5.39E+01 0.00E+00 5.39E+01 Co-60 <2.91E+01 0.00E+00 2.91E+01 Zn-65 <6.77E+01 0.00E+00 6.77E+01 Zr-95 <4.27E+01 0.00E+00 4.27E+01 Nb-95 <2.93E+01 0.00E+00 2.93E+01 I-131 <2.92E+01 0.00E+00 2.92E+01 Cs-134 <2.88E+01 0.00E+00 2.88E+01 Cs-137 <2.68E+01 0.00E+00 2.68E+01 BaLa-140 <2.05E+01 0.00E+00 2.05E+01 Be-7 2.66E+03 4.18E+02 2.97E+02 K-40 3.11E+03 5.95E+02 3.44E+02 Sample Point 079 [ INDICATOR - NE @ 0.56 miles ]

Sample ID: 275259 Sample Dates: 1/6/2014 - 1/6/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD I-131 <4.74E+01 0.00E+00 4.74E+01 Cs-134 <3.86E+01 0.00E+00 3.86E+01 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 82 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 275259 Sample Dates: 1/6/2014 - 1/6/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD Cs-137 <5.76E+01 0.00E+00 5.76E+01 Be-7 7.66E+02 2.36E+02 4.36E+02 K-40 2.31E+03 3.65E+02 6.21E+02 Sample ID: 279585 Sample Dates: 2/3/2014 - 2/3/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD I-131 <5.52E+01 0.00E+00 5.52E+01 Cs-134 <2.79E+01 0.00E+00 2.79E+01 Cs-137 <4.29E+01 0.00E+00 4.29E+01 Be-7 8.54E+02 1.85E+02 4.25E+02 K-40 1.66E+03 3.14E+02 1.61E+02 Sample ID: 281222 Sample Dates: 3/3/2014 - 3/3/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD I-131 <5.74E+01 0.00E+00 5.74E+01 Cs-134 <4.37E+01 0.00E+00 4.37E+01 Cs-137 <5.35E+01 0.00E+00 5.35E+01 Be-7 <5.21E+02 0.00E+00 5.21E+02 K-40 2.37E+03 3.53E+02 4.81E+02 Sample ID: 284402 Sample Dates: 4/7/2014 - 4/7/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD I-131 <2.77E+01 0.00E+00 2.77E+01 Cs-134 <2.82E+01 0.00E+00 2.82E+01 Cs-137 <2.62E+01 0.00E+00 2.62E+01 Be-7 3.96E+02 7.71E+01 1.81E+02 K-40 2.96E+03 2.60E+02 2.74E+02 Sample ID: 287039 Sample Dates: 5/5/2014 - 5/5/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD I-131 <2.39E+01 0.00E+00 2.39E+01 Cs-134 <1.77E+01 0.00E+00 1.77E+01 Cs-137 <2.63E+01 0.00E+00 2.63E+01 Be-7 4.11E+02 9.15E+01 1.67E+02 K-40 3.65E+03 2.60E+02 1.74E+02 Sample ID: 289840 Sample Dates: 6/2/2014 - 6/2/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD I-131 <2.87E+01 0.00E+00 2.87E+01 Cs-134 <2.63E+01 0.00E+00 2.63E+01 Cs-137 <2.91E+01 0.00E+00 2.91E+01 Be-7 5.20E+02 1.38E+02 2.35E+02 K-40 3.10E+03 3.20E+02 3.25E+02 Sample ID: 294844 Sample Dates: 7/7/2014 - 7/7/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD Mn-54 <1.60E+01 0.00E+00 1.60E+01 Co-58 <1.84E+01 0.00E+00 1.84E+01 Fe-59 <3.99E+01 0.00E+00 3.99E+01 Co-60 <1.69E+01 0.00E+00 1.69E+01 Zn-65 <3.48E+01 0.00E+00 3.48E+01 Zr-95 <3.13E+01 0.00E+00 3.13E+01 Nb-95 <1.98E+01 0.00E+00 1.98E+01 I-131 <4.79E+01 0.00E+00 4.79E+01 Cs-134 <1.30E+01 0.00E+00 1.30E+01 Cs-137 <1.54E+01 0.00E+00 1.54E+01 BaLa-140 <2.78E+01 0.00E+00 2.78E+01 Be-7 4.11E+02 1.52E+02 2.23E+02 K-40 3.73E+03 4.60E+02 2.67E+02 Sample ID: 296612 Sample Dates: 8/4/2014 - 8/4/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD Mn-54 <1.53E+01 0.00E+00 1.53E+01 Co-58 <1.67E+01 0.00E+00 1.67E+01 Fe-59 <3.29E+01 0.00E+00 3.29E+01 Co-60 <2.01E+01 0.00E+00 2.01E+01 Zn-65 <4.84E+01 0.00E+00 4.84E+01 Zr-95 <3.34E+01 0.00E+00 3.34E+01 Nb-95 <1.80E+01 0.00E+00 1.80E+01 I-131 <2.69E+01 0.00E+00 2.69E+01 Cs-134 <1.59E+01 0.00E+00 1.59E+01 Cs-137 <1.67E+01 0.00E+00 1.67E+01 BaLa-140 <3.42E+01 0.00E+00 3.42E+01 Be-7 3.85E+02 1.50E+02 2.11E+02 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 83 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 296612 Sample Dates: 8/4/2014 - 8/4/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD K-40 4.09E+03 6.12E+02 5.18E+02 Sample ID: 354457 Sample Dates: 9/2/2014 - 9/2/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD Mn-54 <3.51E+01 0.00E+00 3.51E+01 Co-58 <3.49E+01 0.00E+00 3.49E+01 Fe-59 <6.18E+01 0.00E+00 6.18E+01 Co-60 <3.46E+01 0.00E+00 3.46E+01 Zn-65 <8.64E+01 0.00E+00 8.64E+01 Zr-95 <5.41E+01 0.00E+00 5.41E+01 Nb-95 <3.39E+01 0.00E+00 3.39E+01 I-131 <3.39E+01 0.00E+00 3.39E+01 Cs-134 <4.06E+01 0.00E+00 4.06E+01 Cs-137 <3.03E+01 0.00E+00 3.03E+01 BaLa-140 <2.61E+01 0.00E+00 2.61E+01 Be-7 6.41E+02 2.35E+02 2.82E+02 K-40 3.05E+03 6.93E+02 5.69E+02 Sample ID: 357060 Sample Dates: 10/6/2014 - 10/6/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD Mn-54 <3.89E+01 0.00E+00 3.89E+01 Co-58 <3.27E+01 0.00E+00 3.27E+01 Fe-59 <6.17E+01 0.00E+00 6.17E+01 Co-60 <3.60E+01 0.00E+00 3.60E+01 Zn-65 <9.11E+01 0.00E+00 9.11E+01 Zr-95 <5.67E+01 0.00E+00 5.67E+01 Nb-95 <3.63E+01 0.00E+00 3.63E+01 I-131 <3.83E+01 0.00E+00 3.83E+01 Cs-134 <4.36E+01 0.00E+00 4.36E+01 Cs-137 <3.17E+01 0.00E+00 3.17E+01 BaLa-140 <3.75E+01 0.00E+00 3.75E+01 Be-7 1.03E+03 3.07E+02 3.33E+02 K-40 3.56E+03 7.72E+02 5.42E+02 Sample ID: 360041 Sample Dates: 11/3/2014 - 11/3/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD Mn-54 <4.47E+01 0.00E+00 4.47E+01 Co-58 <4.87E+01 0.00E+00 4.87E+01 Fe-59 <8.06E+01 0.00E+00 8.06E+01 Co-60 <4.57E+01 0.00E+00 4.57E+01 Zn-65 <1.01E+02 0.00E+00 1.01E+02 Zr-95 <6.77E+01 0.00E+00 6.77E+01 Nb-95 <4.25E+01 0.00E+00 4.25E+01 I-131 <4.08E+01 0.00E+00 4.08E+01 Cs-134 <4.44E+01 0.00E+00 4.44E+01 Cs-137 <4.62E+01 0.00E+00 4.62E+01 BaLa-140 <4.16E+01 0.00E+00 4.16E+01 Be-7 7.30E+02 4.54E+02 6.98E+02 K-40 2.97E+03 8.04E+02 7.70E+02 Sample ID: 362794 Sample Dates: 12/1/2014 - 12/1/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD Mn-54 <1.18E+01 0.00E+00 1.18E+01 Co-58 <1.18E+01 0.00E+00 1.18E+01 Fe-59 <2.86E+01 0.00E+00 2.86E+01 Co-60 <1.30E+01 0.00E+00 1.30E+01 Zn-65 <2.73E+01 0.00E+00 2.73E+01 Zr-95 <2.26E+01 0.00E+00 2.26E+01 Nb-95 <1.43E+01 0.00E+00 1.43E+01 I-131 <4.77E+01 0.00E+00 4.77E+01 Cs-134 <1.26E+01 0.00E+00 1.26E+01 Cs-137 <1.28E+01 0.00E+00 1.28E+01 BaLa-140 <2.86E+01 0.00E+00 2.86E+01 Be-7 1.12E+03 1.63E+02 1.55E+02 K-40 3.31E+03 3.73E+02 2.20E+02 Sample Point 081 [ CONTROL - SE @ 9.33 miles ]

Sample ID: 275260 Sample Dates: 1/6/2014 - 1/6/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD I-131 <4.34E+01 0.00E+00 4.34E+01 Cs-134 <2.72E+01 0.00E+00 2.72E+01 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 84 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 275260 Sample Dates: 1/6/2014 - 1/6/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD Cs-137 <4.33E+01 0.00E+00 4.33E+01 Be-7 3.76E+02 1.57E+02 3.56E+02 K-40 4.57E+03 5.10E+02 4.99E+02 Sample ID: 279586 Sample Dates: 2/3/2014 - 2/3/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD I-131 <3.43E+01 0.00E+00 3.43E+01 Cs-134 <3.27E+01 0.00E+00 3.27E+01 Cs-137 <4.42E+01 0.00E+00 4.42E+01 Be-7 4.19E+02 1.24E+02 2.93E+02 K-40 3.78E+03 4.10E+02 4.79E+02 Sample ID: 281223 Sample Dates: 3/3/2014 - 3/3/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD I-131 <5.06E+01 0.00E+00 5.06E+01 Cs-134 <4.93E+01 0.00E+00 4.93E+01 Cs-137 <6.36E+01 0.00E+00 6.36E+01 Be-7 <5.24E+02 0.00E+00 5.24E+02 K-40 3.13E+03 4.43E+02 5.74E+02 Sample ID: 284403 Sample Dates: 4/7/2014 - 4/7/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD I-131 <4.84E+01 0.00E+00 4.84E+01 Cs-134 <4.55E+01 0.00E+00 4.55E+01 Cs-137 <5.26E+01 0.00E+00 5.26E+01 Be-7 <5.14E+02 0.00E+00 5.14E+02 K-40 3.68E+03 5.00E+02 7.30E+02 Sample ID: 287040 Sample Dates: 5/5/2014 - 5/5/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD I-131 <4.08E+01 0.00E+00 4.08E+01 Cs-134 <3.66E+01 0.00E+00 3.66E+01 Cs-137 <5.85E+01 0.00E+00 5.85E+01 Be-7 6.12E+02 1.70E+02 3.64E+02 K-40 3.90E+03 4.61E+02 4.80E+02 Sample ID: 289841 Sample Dates: 6/2/2014 - 6/2/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD I-131 <4.81E+01 0.00E+00 4.81E+01 Cs-134 <4.32E+01 0.00E+00 4.32E+01 Cs-137 <4.43E+01 0.00E+00 4.43E+01 Be-7 2.39E+02 1.67E+02 2.90E+02 K-40 4.70E+03 4.81E+02 3.85E+02 Sample ID: 294845 Sample Dates: 7/7/2014 - 7/7/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD Mn-54 <2.22E+01 0.00E+00 2.22E+01 Co-58 <1.95E+01 0.00E+00 1.95E+01 Fe-59 <5.70E+01 0.00E+00 5.70E+01 Co-60 <2.61E+01 0.00E+00 2.61E+01 Zn-65 <5.42E+01 0.00E+00 5.42E+01 Zr-95 <4.25E+01 0.00E+00 4.25E+01 Nb-95 <2.67E+01 0.00E+00 2.67E+01 I-131 <4.78E+01 0.00E+00 4.78E+01 Cs-134 <1.29E+01 0.00E+00 1.29E+01 Cs-137 <2.00E+01 0.00E+00 2.00E+01 BaLa-140 <3.91E+01 0.00E+00 3.91E+01 Be-7 6.87E+02 2.09E+02 2.53E+02 K-40 3.51E+03 5.70E+02 2.60E+02 Sample ID: 296613 Sample Dates: 8/4/2014 - 8/4/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD Mn-54 <2.29E+01 0.00E+00 2.29E+01 Co-58 <2.67E+01 0.00E+00 2.67E+01 Fe-59 <5.45E+01 0.00E+00 5.45E+01 Co-60 <3.18E+01 0.00E+00 3.18E+01 Zn-65 <6.07E+01 0.00E+00 6.07E+01 Zr-95 <3.34E+01 0.00E+00 3.34E+01 Nb-95 <2.59E+01 0.00E+00 2.59E+01 I-131 <2.34E+01 0.00E+00 2.34E+01 Cs-134 <2.43E+01 0.00E+00 2.43E+01 Cs-137 <2.32E+01 0.00E+00 2.32E+01 BaLa-140 <3.53E+01 0.00E+00 3.53E+01 Be-7 2.11E+03 3.59E+02 2.74E+02 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 85 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 296613 Sample Dates: 8/4/2014 - 8/4/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD K-40 5.24E+03 8.15E+02 4.35E+02 Sample ID: 354458 Sample Dates: 9/2/2014 - 9/2/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD Mn-54 <4.65E+01 0.00E+00 4.65E+01 Co-58 <3.35E+01 0.00E+00 3.35E+01 Fe-59 <5.52E+01 0.00E+00 5.52E+01 Co-60 <5.78E+01 0.00E+00 5.78E+01 Zn-65 <7.95E+01 0.00E+00 7.95E+01 Zr-95 <8.30E+01 0.00E+00 8.30E+01 Nb-95 <3.49E+01 0.00E+00 3.49E+01 I-131 <3.48E+01 0.00E+00 3.48E+01 Cs-134 <4.55E+01 0.00E+00 4.55E+01 Cs-137 <3.20E+01 0.00E+00 3.20E+01 BaLa-140 <4.93E+01 0.00E+00 4.93E+01 Be-7 2.32E+03 4.81E+02 4.08E+02 K-40 5.13E+03 1.01E+03 3.99E+02 Sample ID: 357061 Sample Dates: 10/6/2014 - 10/6/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD Mn-54 <4.69E+01 0.00E+00 4.69E+01 Co-58 <3.63E+01 0.00E+00 3.63E+01 Fe-59 <8.14E+01 0.00E+00 8.14E+01 Co-60 <3.91E+01 0.00E+00 3.91E+01 Zn-65 <9.68E+01 0.00E+00 9.68E+01 Zr-95 <7.37E+01 0.00E+00 7.37E+01 Nb-95 <4.05E+01 0.00E+00 4.05E+01 I-131 <4.53E+01 0.00E+00 4.53E+01 Cs-134 <4.62E+01 0.00E+00 4.62E+01 Cs-137 <4.75E+01 0.00E+00 4.75E+01 BaLa-140 <4.66E+01 0.00E+00 4.66E+01 Be-7 1.69E+03 4.14E+02 4.64E+02 K-40 4.80E+03 9.13E+02 5.86E+02 Sample ID: 360042 Sample Dates: 11/3/2014 - 11/3/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD Mn-54 <2.15E+01 0.00E+00 2.15E+01 Co-58 <1.76E+01 0.00E+00 1.76E+01 Fe-59 <3.66E+01 0.00E+00 3.66E+01 Co-60 <2.58E+01 0.00E+00 2.58E+01 Zn-65 <5.72E+01 0.00E+00 5.72E+01 Zr-95 <3.69E+01 0.00E+00 3.69E+01 Nb-95 <1.82E+01 0.00E+00 1.82E+01 I-131 <1.75E+01 0.00E+00 1.75E+01 Cs-134 <3.15E+01 0.00E+00 3.15E+01 Cs-137 <2.09E+01 0.00E+00 2.09E+01 BaLa-140 <2.71E+01 0.00E+00 2.71E+01 Be-7 1.33E+03 2.77E+02 2.48E+02 K-40 2.58E+03 5.31E+02 3.42E+02 Sample ID: 362795 Sample Dates: 12/1/2014 - 12/1/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD Mn-54 <1.76E+01 0.00E+00 1.76E+01 Co-58 <2.13E+01 0.00E+00 2.13E+01 Fe-59 <4.88E+01 0.00E+00 4.88E+01 Co-60 <2.24E+01 0.00E+00 2.24E+01 Zn-65 <5.61E+01 0.00E+00 5.61E+01 Zr-95 <4.09E+01 0.00E+00 4.09E+01 Nb-95 <2.57E+01 0.00E+00 2.57E+01 I-131 <2.42E+01 0.00E+00 2.42E+01 Cs-134 <3.36E+01 0.00E+00 3.36E+01 Cs-137 <2.36E+01 0.00E+00 2.36E+01 BaLa-140 <2.17E+01 0.00E+00 2.17E+01 Be-7 1.12E+03 2.44E+02 2.37E+02 K-40 3.16E+03 5.45E+02 2.20E+02 Sample Point 084 [ INDICATOR - NNE @ 2.58 miles ]

Sample ID: 275261 Sample Dates: 1/6/2014 - 1/6/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD I-131 <3.14E+01 0.00E+00 3.14E+01 Cs-134 <2.39E+01 0.00E+00 2.39E+01 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 86 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 275261 Sample Dates: 1/6/2014 - 1/6/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD Cs-137 <2.82E+01 0.00E+00 2.82E+01 Be-7 4.53E+03 2.77E+02 2.63E+02 K-40 2.03E+03 3.00E+02 3.30E+02 Sample ID: 279587 Sample Dates: 2/3/2014 - 2/3/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD I-131 <2.23E+01 0.00E+00 2.23E+01 Cs-134 <2.22E+01 0.00E+00 2.22E+01 Cs-137 <1.99E+01 0.00E+00 1.99E+01 Be-7 1.40E+03 1.18E+02 1.78E+02 K-40 2.88E+03 2.08E+02 1.87E+02 Sample ID: 281224 Sample Dates: 3/3/2014 - 3/3/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD I-131 <2.27E+01 0.00E+00 2.27E+01 Cs-134 <2.29E+01 0.00E+00 2.29E+01 Cs-137 <2.90E+01 0.00E+00 2.90E+01 Be-7 2.70E+03 1.81E+02 1.98E+02 K-40 2.72E+03 2.50E+02 2.21E+02 Sample ID: 284405 Sample Dates: 4/7/2014 - 4/7/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD I-131 <3.74E+01 0.00E+00 3.74E+01 Cs-134 <3.67E+01 0.00E+00 3.67E+01 Cs-137 <4.50E+01 0.00E+00 4.50E+01 Be-7 2.18E+03 2.34E+02 2.94E+02 K-40 2.42E+03 3.29E+02 5.99E+02 Sample ID: 287042 Sample Dates: 5/5/2014 - 5/5/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD I-131 <3.33E+01 0.00E+00 3.33E+01 Cs-134 <3.17E+01 0.00E+00 3.17E+01 Cs-137 <3.14E+01 0.00E+00 3.14E+01 Be-7 2.90E+02 1.31E+02 2.43E+02 K-40 3.46E+03 3.82E+02 3.95E+02 Sample ID: 289843 Sample Dates: 6/2/2014 - 6/2/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD I-131 <5.83E+01 0.00E+00 5.83E+01 Cs-134 <4.79E+01 0.00E+00 4.79E+01 Cs-137 <5.14E+01 0.00E+00 5.14E+01 Be-7 4.58E+02 2.39E+02 4.00E+02 K-40 3.62E+03 4.27E+02 3.69E+02 Sample ID: 294847 Sample Dates: 7/7/2014 - 7/7/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD Mn-54 <1.48E+01 0.00E+00 1.48E+01 Co-58 <1.48E+01 0.00E+00 1.48E+01 Fe-59 <3.94E+01 0.00E+00 3.94E+01 Co-60 <1.65E+01 0.00E+00 1.65E+01 Zn-65 <3.43E+01 0.00E+00 3.43E+01 Zr-95 <2.85E+01 0.00E+00 2.85E+01 Nb-95 <1.60E+01 0.00E+00 1.60E+01 I-131 <4.11E+01 0.00E+00 4.11E+01 Cs-134 <1.12E+01 0.00E+00 1.12E+01 Cs-137 <1.53E+01 0.00E+00 1.53E+01 BaLa-140 <2.46E+01 0.00E+00 2.46E+01 Be-7 7.01E+02 1.64E+02 1.94E+02 K-40 2.74E+03 3.93E+02 2.03E+02 Sample ID: 296615 Sample Dates: 8/4/2014 - 8/4/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD Mn-54 <4.21E+01 0.00E+00 4.21E+01 Co-58 <4.50E+01 0.00E+00 4.50E+01 Fe-59 <1.04E+02 0.00E+00 1.04E+02 Co-60 <6.77E+01 0.00E+00 6.77E+01 Zn-65 <7.67E+01 0.00E+00 7.67E+01 Zr-95 <1.49E+01 0.00E+00 1.49E+01 Nb-95 <3.32E+01 0.00E+00 3.32E+01 I-131 <3.70E+01 0.00E+00 3.70E+01 Cs-134 <4.11E+01 0.00E+00 4.11E+01 Cs-137 <5.96E+01 0.00E+00 5.96E+01 BaLa-140 <6.09E+01 0.00E+00 6.09E+01 Be-7 1.12E+03 3.39E+02 2.85E+02 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 87 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2014 (Appendix E)

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

Sample ID: 296615 Sample Dates: 8/4/2014 - 8/4/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD K-40 2.34E+03 7.79E+02 6.91E+02 Sample ID: 354459 Sample Dates: 9/2/2014 - 9/2/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD Mn-54 <1.46E+01 0.00E+00 1.46E+01 Co-58 <1.55E+01 0.00E+00 1.55E+01 Fe-59 <3.39E+01 0.00E+00 3.39E+01 Co-60 <1.53E+01 0.00E+00 1.53E+01 Zn-65 <3.65E+01 0.00E+00 3.65E+01 Zr-95 <2.93E+01 0.00E+00 2.93E+01 Nb-95 <1.89E+01 0.00E+00 1.89E+01 I-131 <4.41E+01 0.00E+00 4.41E+01 Cs-134 <1.96E+01 0.00E+00 1.96E+01 Cs-137 <1.39E+01 0.00E+00 1.39E+01 BaLa-140 <3.15E+01 0.00E+00 3.15E+01 Be-7 3.00E+02 1.46E+02 2.26E+02 K-40 2.24E+03 3.94E+02 4.52E+02 Sample ID: 357062 Sample Dates: 10/6/2014 - 10/6/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD Mn-54 <2.09E+01 0.00E+00 2.09E+01 Co-58 <2.24E+01 0.00E+00 2.24E+01 Fe-59 <5.49E+01 0.00E+00 5.49E+01 Co-60 <3.06E+01 0.00E+00 3.06E+01 Zn-65 <5.42E+01 0.00E+00 5.42E+01 Zr-95 <4.52E+01 0.00E+00 4.52E+01 Nb-95 <2.99E+01 0.00E+00 2.99E+01 I-131 <4.71E+01 0.00E+00 4.71E+01 Cs-134 <2.74E+01 0.00E+00 2.74E+01 Cs-137 <2.72E+01 0.00E+00 2.72E+01 BaLa-140 <4.61E+01 0.00E+00 4.61E+01 Be-7 1.21E+03 3.18E+02 4.33E+02 K-40 3.04E+03 4.91E+02 3.74E+02 Sample ID: 360043 Sample Dates: 11/3/2014 - 11/3/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD Mn-54 <1.73E+01 0.00E+00 1.73E+01 Co-58 <1.46E+01 0.00E+00 1.46E+01 Fe-59 <2.71E+01 0.00E+00 2.71E+01 Co-60 <1.46E+01 0.00E+00 1.46E+01 Zn-65 <3.17E+01 0.00E+00 3.17E+01 Zr-95 <2.53E+01 0.00E+00 2.53E+01 Nb-95 <1.63E+01 0.00E+00 1.63E+01 I-131 <1.37E+01 0.00E+00 1.37E+01 Cs-134 <2.09E+01 0.00E+00 2.09E+01 Cs-137 <1.56E+01 0.00E+00 1.56E+01 BaLa-140 <1.71E+01 0.00E+00 1.71E+01 Be-7 1.83E+03 2.48E+02 1.92E+02 K-40 2.78E+03 3.89E+02 2.53E+02 Sample ID: 362796 Sample Dates: 12/1/2014 - 12/1/2014 MIXEDBLV Nuclide Activity Sigma Error 1 LLD Mn-54 <2.16E+01 0.00E+00 2.16E+01 Co-58 <1.74E+01 0.00E+00 1.74E+01 Fe-59 <4.49E+01 0.00E+00 4.49E+01 Co-60 <3.01E+01 0.00E+00 3.01E+01 Zn-65 <6.32E+01 0.00E+00 6.32E+01 Zr-95 <3.57E+01 0.00E+00 3.57E+01 Nb-95 <1.91E+01 0.00E+00 1.91E+01 I-131 <2.01E+01 0.00E+00 2.01E+01 Cs-134 <1.67E+01 0.00E+00 1.67E+01 Cs-137 <2.25E+01 0.00E+00 2.25E+01 BaLa-140 <2.29E+01 0.00E+00 2.29E+01 Be-7 3.22E+03 4.32E+02 1.73E+02 K-40 2.69E+03 5.51E+02 4.48E+02 (1) Effective 10JUL2014, analytical samples indicating detectable activity are reported with 2 Sigma error.

Report Generated @ 3/25/2015 15:45:42 EnRad Laboratories Appendix E - Page 88 of 88 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

APPENDIX F ERRATA TO PREVIOUS REPORTS Appendix F - Page 1

APPENDIX F ERRATA TO THE 2014 AREOR Oconee AREORs: 2009, 2011, and 2013 Report titled "Environmental TLD Dose Report" used by the Dosimetry Laboratory to communicate final TLD results was found to have an error in the calculation of dose per standard quarter. The error would have existed since the reports first use for 2nd quarter 2009 and only applies to quarters where date ranges were other than a standard quarter (not equal to 91 days). Oconee environmental TLD data were evaluated and it was determined the quarters affected were Oconee 3Q2009, Oconee 1Q2011, and Oconee 1Q2013. Oconee environmental TLD results were updated during 2015 in the EnRad Sample Manager database to indicate the corrected dose per standard quarter values derived from the new Dosimetry Laboratory reporting mechanism. (PIP G-14-02451).

2009 Oconee AREOR entities affected:

Section 3.8, Figure 3.8

Section 3.8, Table 3.8

2009 inner ring average updated from 83.7 mR/yr to 85.1 mR/yr

2009 outer ring average updated from 93.0 mR/yr to 94.5 mR/yr

2009 control average updated from 110 mR/yr to 112 mR/yr 2009 Appendix B, Direct Radiation TLD section 2009 TLD Appendix B section as originally reported All Indicator Locations Location with Highest Annual Mean Control Location Mean (Fraction) Location Mean (Fraction) Mean (Fraction)

Range Code Range Range 22.3 (160 / 160) 042 27.5 (4 / 4) 27.5 (8 / 8) 13.9 - 30.9 (4.93 mi SE) 23.2 - 30.7 20.4 - 34.8 Updated 2009 TLD Appendix B section All Indicator Locations Location with Highest Annual Mean Control Location Mean (Fraction) Location Mean (Fraction) Mean (Fraction)

Range Code Range Range 22.6 (160 / 160) 042 28.0 (4 / 4) 28.0 (8 / 8) 15.0 - 30.9 (4.93 mi SE) 25.1- 30.7 22.0 - 34.8 Appendix F - Page 2

2011 Oconee AREOR entities affected:

Section 3.8, Figure 3.8-1, Figure 3.8-2, Figure 3.8-3

Section 3.8, Table 3.8-A, Table 3.8-B, Table 3.8-C

2011 inner ring average updated from 83.7 mR/yr to 83.8 mR/yr

2011 outer ring average updated from 94.0 mR/yr to 93.8 mR/yr

2011 control average updated from 111 mR/yr to 111 mR/yr 2011 Appendix B, Direct Radiation TLD section 2011 TLD Appendix B section as originally reported All Indicator Locations Location with Highest Annual Mean Control Location Mean (Fraction) Location Mean (Fraction) Mean (Fraction)

Range Code Range Range 22.4 (160 / 160) 048 28.0 (4 / 4) 27.8 (8 / 8) 12.0 - 32.0 (3.64 mi W) 25.0 - 32.0 20.0 - 37.0 Updated 2011 TLD Appendix B section All Indicator Locations Location with Highest Annual Mean Control Location Mean (Fraction) Location Mean (Fraction) Mean (Fraction)

Range Code Range Range 22.4 (160 / 160) 048 28.0 (4 / 4) 27.7 (8 / 8) 12.0 - 32.1 (3.64 mi W) 25.0- 31.8 20.0 - 36.8 2013 Oconee AREOR entities affected:

Section 3.8, Figure 3.8

Section 3.8, Table 3.8

2013 inner ring average updated from 80.7 mR/yr to 82.4 mR/yr

2013 outer ring average updated from 91.0 mR/yr to 93.0 mR/yr

2013 control average updated from 110 mR/yr to 112 mR/yr 2013 Appendix B, Direct Radiation TLD section 2013 TLD Appendix B section as originally reported All Indicator Locations Location with Highest Annual Mean Control Location Mean (Fraction) Location Mean (Fraction) Mean (Fraction)

Range Code Range Range 21.7 (159 / 159) 040 27.6 (3 / 3) 27.5 (8 / 8) 14.0 - 29.7 (4.74 mi E) 26.0 - 29.7 21.0 - 35.3 Updated 2013 TLD Appendix B section All Indicator Locations Location with Highest Annual Mean Control Location Mean (Fraction) Location Mean (Fraction) Mean (Fraction)

Range Code Range Range 22.1 (159 / 159) 040 28.3 (3 / 3) 28.1 (8 / 8) 14.0 - 31.9 (4.74 mi E) 26.0 - 31.9 21.0 - 38.1 Appendix F - Page 3

ONS-2015-059, 2014 Annual Radiological Environmental Operating Report

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ONS-2015-059, 2014 Annual Radiological Environmental Operating Report

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