Text

Annual Radiological Environmental Operating Report
	ML13175A174
Person / Time
Site:	Oconee
Issue date:	05/15/2013
From:	; Duke Energy Carolinas
To:	; Office of Nuclear Reactor Regulation
References
	Download: ML13175A174 (204)
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ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT DUKE ENERGY CORPORATION OCONEE NUCLEAR STATION Units 1, 2, and 3 2012

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 . . . . . . . . . . 3-20 3.8.1 Environmental TLD . . . . . . . . . . 3-20 3.8.2 ISFSI . . . . . . . . . . . . 3-20 3.9 Land Use Census . . . . . . . . . . . 3-25 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 Intercomparison Program . . . . . . . 5-1 5.6 Eckert & Ziegler Analytics Cross Check Program . . . . . 5-2 5.7 ERA Proficiency Testing . . . . . . . . . . 5-2 5.8 Duke Energy Audits . . . . . . . . . . . 5-2 5.9 U.S. Nuclear Regulatory Commission Inspections . . . . . 5-2 5.10 State of South Carolina Intercomparison Program . . . . . 5-2 5.11 TLD Intercomparison Program . . . . . . . . . 5-3 5.11.1 Nuclear Technology Services Intercomparison Program . . . 5-3 5.11.2 Internal Crosscheck (Duke Energy) . . . . . . . 5-3 6.0 References . . . . . . . . . . . . . 6-1 i

Appendices Appendix A: Environmental Sampling and Analysis Procedures . . . . A-1 I. Change of Sampling Procedures . . . . . . . . . A-2 II. Description of Analysis Procedures . . . . . . . . A-2 III. Change of Analysis Procedures . . . . . . . . . A-3 IV. Sampling and Analysis Procedures . . . . . . . . A-3 A.1 Airborne Particulate and Radioiodine . . . . . . A-3 A.2 Drinking Water . . . . . . . . . . A-3 A.3 Surface Water . . . . . . . . . . . A-4 A.4 Milk . . . . . . . . . . . . A-4 A.5 Broadleaf Vegetation . . . . . . . . . A-4 A.6 Fish . . . . . . . . . . . . A-4 A.7 Shoreline Sediment . . . . . . . . . . A-4 A.8 Direct Gamma Radiation (TLD) . . . . . . . A-5 A.9 Annual Land Use Census . . . . . . . . . A-5 V. Global Positioning System (GPS) Analysis . . . . . . . A-5 Appendix B: Radiological Env. Monitoring Program - Summary of Results . . B-1 Air Particulate . . . . . . . . . . . . B-2 Air Radioiodine. . . . . . . . . . . . B-3 Drinking Water . . . . . . . . . . . . B-4 Surface Water . . . . . . . . . . . . B-5 Milk . . . . . . . . . . . . . . B-6 Broadleaf Vegetation . . . . . . . . . . B-7 Fish . . . . . . . . . . . . . . B-8 Shoreline Sediment . . . . . . . . . . . B-9 Direct Gamma Radiation (TLD) . . . . . . . . B-10 Appendix C: Sampling Deviations and Unavailable Analyses . . . . . C-1 C.1 Sampling Deviations . . . . . . . . . . C-2 C.2 Unavailable Analyses . . . . . . . . . . C-3 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 3.7-1 Concentration of Cs-137 in Shoreline Sediment . . . . . . 3-18 3.7-2 Concentration of Co-60 in Shoreline Sediment . . . . . . 3-18 3.8-1 Direct Gamma Radiation (TLD) Results . . . . . . . 3-21 3.8-2 Oconee Inner Ring (TLD) Results . . . . . . . . 3-23 3.8-3 Oconee Outer Ring (TLD) Results . . . . . . . . 3-24 3.9 2012 Land Use Census Map . . . . . . . . . 3-26 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 ii

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 Concentrations of Radionuclides in Milk . . . . . . 3-11 3.5 Mean Concentrations 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 . . . 3-19 3.8-A Direct Gamma Radiation (TLD) Results . . . . . . . 3-22 3.8-B Direct Gamma Radiation (TLD) Results Inner Ring . . . . . 3-23 3.8-C Direct Gamma Radiation (TLD) Results Outer Ring . . . . . 3-24 3.9 Oconee 2012 Land Use Census Results . . . . . . . 3-25 4.1-A 2012 Environmental and Effluent Dose Comparison . . . . . 4-3 4.1-B Maximum Individual Dose for 2012 based on Environmental Measurements 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 . . . . . 5-10 5.0-C Environmental Resource Associates (ERA) Proficiency Testing . . . 5-13 5.0-D 2012 Environmental Dosimeter Cross-Check Results . . . . . 5-15 LIST OF ACRONYMS USED IN THIS TEXT (in alphabetical order)

BW BiWeekly C Control DEHNR Department of Environmental Health and Natural Resources DHEC Department of Health and Environmental 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 2012.

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 sixty-nine samples were analyzed comprising 1,346 test results in order to compile data for the 2012 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 2012 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, shoreline sediment, and fish 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 6.68E-02 mrem for 2012. 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)

(reference 6.15). It is therefore concluded that station operations has had no significant radiological impact on the health and safety of the public or the environment.

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 (reference 6.8):

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.

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). 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 Location s

... All Othef locations A/ ONS_Railroads

/'V ONS_Roads L I States C) eounties Keo_" NHDWaterbody 258"L--~

.+

' .....~'~.2~'~===='~i~

Pn;edion NCSP ",",027 s

Section 2 - Page 4

Figure 2.1-2 Oconee Nuclear Stati on Sampling Locations Map (Ten Mil e Radius)

Legend

TLD Locations

... All Other Loca tions

/"0/ ONS Railroads

/ ' . / NavteqHwys I::l States C l eounties NHOWaterbody Incorporated Areas

....,pr""im~lc loe.lion of f(:I>lIJ.et 3hCM'n o_

-*. 2 3

I Miles Projedia> 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 Air Rad. & Surface Drinking Shoreline Fish Milk Broadleaf Location Description* Particulate Water Water Sediment 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 (6.67 mi SSW) [004.1] M 066 I Anderson (18.9 mi SSE) [012] M 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 074 I Keowee Key Resort (2.36 mi NNW) W 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 Air Particulate Weekly X 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 2012 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 2012 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.

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 2012.

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 2012 due to ONS operation was 4.33% for Co-58, Co-60, and Cs-137 in a fish sample collected at location 063.

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 2012.

Section 3 - Page 1

3.1 AIRBORNE RADIOIODINE AND PARTICULATES In 2012, 312 radioiodine and particulate samples were analyzed, 260 from five indicator locations and 52 from the control location. Particulate samples were analyzed weekly for gamma and gross beta. Radioiodine samples received a weekly gamma analysis.

Indicator location 074 was replaced by indicator location 085 in 2012. Location 074 was determined to be located too close to a municipal waste treatment facility (reference 6.16).

Location 085 was the highest indicator location during 2012. The data from this location is slightly higher than typical and was effective 9/17/2012 through 12/31/2012.

There was no detectable I-131 in air samples in 2012. 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 2012 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.

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

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 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 0.00E0 = no detectable measurements 1979 - 1986 mean based on all net activity results 2011 concentration affected by Fukushima Daiichi 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 Indicator Location Control Location Pre-operational sample results ranged from 0.04 to1.46 pCi/m3 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 Average (2002 - 2011) 2.01E-2 1.94E-2 2012 2.63E-2 1.97E-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 1.40 pCi/liter in 2012, and the control location had a concentration of 0.92 pCi/liter. The 2011 indicator mean was 1.18 pCi/liter. The table shows that 2012 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 2012; therefore low-level iodine analysis is not required.

Tritium was detected in four of the twelve composite samples during 2012. The 2012 mean indicator location 066 concentration was 322 pCi/liter, which is 1.61% of the 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 identified in drinking water samples in 2012.

Gamma spectroscopy analysis has not detected any activity in the water supplies since 1988.

K-40 is the naturally occurring radionuclide that was observed in drinking water samples.

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 1976 1979 1982 1985 1988 1991 1994 1997 2000 2003 2006 2009 2012 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 0.00 = 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 2012 average concentration was 5,755 pCi/liter. The individual samples ranged from 3,960 pCi/liter to 7,640 pCi/liter. The 2011 mean concentration was 4,750 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 activity during 2012. 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 2012 did not reveal any increasing trends.

K-40 and Be-7 are the naturally occurring radionuclide observed in surface water samples in 2012.

Section 3 - Page 7

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

1969 1972 1975 1977 1980 1983 1986 1989 1992 1995 1998 2001 2004 2007 2010 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 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 0.00E0 = no detectable measurements 1979-1986 mean based on all net activity results Section 3 - Page 9

3.4 MILK Gamma spectroscopy and low level iodine analysis was performed on 26 milk samples collected in 2012. One control location was sampled. No indicator dairies were identified by the 2012 land use census.

There were no gamma emitting radionuclides due to ONS plant operations identified in milk samples in 2012. 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 has been observed in samples from indicator and control locations in previous years.

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 is a naturally occurring radionuclide observed in milk samples in 2012.

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 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 0.00E0 = no detectable measurements 1979 - 1986 mean based on all net activity results 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 2012 land use census.

Section 3 - Page 11

3.5 BROADLEAF VEGETATION Gamma spectroscopy was performed on 48 broadleaf vegetation samples during 2012. 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 2012.

Cs-137 is the only radionuclide, other than naturally occurring, reported in vegetation samples since the change in gamma spectroscopy analysis systems in 1987. 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 has been observed in samples from indicator and control locations in previous years. 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 are naturally occurring radionuclides that were observed in broadleaf vegetation samples in 2012.

Figure 3.5 pCi/kg Concentration of Cs 137 in Broadleaf Vegetation 2500 2000 1500 1000 500 0

1974 1976 1979 1982 1985 1988 1991 1994 1997 2000 2003 2006 2009 2012 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 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 0.00E0 = no detectable measurements Only qualitative results reported prior to 1974 Control location changed to 073 in 1984 Control location 081 added in 1998 Control location 073 was removed in 1999 1979 - 1986 mean based on all net activity results 2011 concentration affected by Fukushima Daiichi Section 3 - Page 13

3.6 FISH In 2012, gamma spectroscopy was performed on 12 fish samples. Two downstream indicator and one control location were sampled. Cs-137 was identified in seven of the eight indicator location samples. Cs-137 was detected in three of the four control location samples at a mean concentration of 28.0 pCi/kg. The highest average indicator concentration for Cs-137 was 43.2 pCi/kg (2.16% of reporting level).

Co-58 and Co-60 were detected in one of the four indicator samples. Co-58 was identified at location 063 with an annual mean concentration of 123 pCi/kg (0.41% of reporting level).

Co-60 was identified at location 063 with an annual mean concentration of 36.1 pCi/kg (0.36% of reporting level). An evaluation of these results was performed to document the review of sample collection and analysis methods and the review of effluent releases (reference 6.14). Additional fish sampling was performed at location 063 in January 2013 which produced analytical results similar to other fish from previous sampling events.

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 2012. 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 was observed in fish samples in addition to the radionuclides discussed above.

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 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 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 1.63E2 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 0.00E0 = no detectable measurements 1979 - 1986 mean based on all net activity results 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 the four indicator location samples. Cs-137 was not identified in the control location samples. The highest 2012 individual sample Cs-137 concentration was 80.6 pCi/kg. The highest 2011 individual sample Cs-137 concentration was 81.1 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 3.7-1 is a graph of the Cs-137 annual means. Figure 3.7-2 is a graph of the Co-60 annual means. Historically, both are contributors to the calculated dose from liquid effluents from shoreline sediment. No trends are apparent.

K-40 and Be-7 are naturally occurring radionuclides observed in shoreline sediment samples in 2012.

Section 3 - Page 17

Figure 3.7-1 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 Indicator Location 063 Indicator Location 067 Control Location 068 Figure 3.7-2 pCi/kg Concentration of Co 60 in Shoreline Sediment 1000 900 800 700 600 500 400 300 200 100 0

1984 1987 1990 1993 1996 1999 2002 2005 2008 2011 Indicator Location 063 Indicator Location 067 Control Location 068 There are no reporting levels for shoreline sediment Section 3 - Page 18

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 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 0.00E0 = no detectable measurements 1984-1986 mean based on all net activity results Section 3 - Page 19

3.8 DIRECT GAMMA RADIATION 3.8.1 ENVIRONMENTAL TLD In 2012, 168 Thermoluminescent Dosimeters (TLD) were analyzed, 160 at indicator locations, 8 at the two control locations. TLDs are collected and analyzed quarterly.

A transit background for environmental TLDs is determined based on ANSI N545.

The highest annual mean exposure for an indicator location was 107 milliroentgen.

TLDs at three locations produced the same average (location 036 at 4.18 miles from site; location 040 at 4.74 miles from site; and location 042 at 4.93 miles from site).

The highest quarterly result was 31 milliroentgen at location 042. The annual mean exposure for the control locations was 111 milliroentgen.

Figure 3.8-1 and Table 3.8-A show TLD inner ring (site boundary), outer ring (4-5 miles), and control location annual averages in milliroentgen 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, inner and outer ring averages historically compare closely, with control data somewhat higher. Inner and outer ring averages comprise a number of data points with control averages representing only two locations. The control locations have historically been higher than indicator locations. This is most likely an artifact of the underlying geologic structures at the control locations. The control locations are 9.39 miles WSW and 9.33 miles SE, well beyond the influence of the plant.

Figures 3.8-2 and 3.8-3 show the TLD mean for each inner and outer ring TLD location from 1984 through 2012. Data prior to 1984 was not included due to programmatic changes implemented in 1984.

The calculated total body dose (from gaseous effluents) for 2012 was 1.22E-1 mrem, which is 0.15% of the average inner ring TLD values. Therefore, it can be concluded that discharges from the plant had very little impact upon the measured TLD values.

A TLD intercomparison program is conducted as part of the quality assurance program. Results of this program are included in section 5.10.

3.8.2 ISFSI The Oconee Independent Spent Fuel Storage Installation (ISFSI) is a fenced, secured area constructed to provide dry storage for spent nuclear fuel. The principal components of the ISFSI are concrete horizontal storage modules that hold stainless steel dry storage canisters containing irradiated fuel assemblies. Oconee began storage of spent fuel at the ISFSI in 1990.

Section 3 - Page 20

The ISFSI is located in the southwest end of the plant, approximately 400 meters from Unit 2 reactor building. The radiological environmental monitoring program for Oconee also serves as the operational program for the ISFSI. No liquid or airborne effluents are anticipated from the passive storage provided by the ISFSI. Therefore any dose to offsite points would be from direct and scattered gamma radiation.

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 and used in monitoring occupational exposure controls.

The maximum measurement from TLDs at the Independent Spent Fuel Storage Installation fence (which is not accessible to the public) was 622 milliroentgen per standard quarter. This is consistent with previous measurements.

Figure 3.8-1 mR/year Direct Gamma Radiation (TLD) Results 250 200 150 100 50 0

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

Section 3 - Page 21

Table 3.8-A Direct Gamma Radiation (TLD) Results Year Inner Ring Average Outer Ring Average Control (mR/yr) (mR/yr) (mR/yr)

Preoperational 113 124 149 1984 79.4 83.8 110 1985 117 122 157 1986 104 106 151 1987 84.3 88.8 104 1988 72.3 78.6 113 1989 63.7 61.7 89.4 1990 52.2 50.7 70.1 1991 61.2 65.0 88.0 1992 76.2 73.2 92.0 1993 74.8 80.6 93.0 1994 86.8 94.7 112 1995 93.6 102 132 1996 68.5 78.3 101 1997 72.8 83.8 104 1998 71.7 80.8 118 1999 74.5 82.5 104 2000 76.2 84.5 106 2001 73.6 82.4 102 2002 76.6 85.3 108 2003 77.4 86.6 109 2004 80.1 87.5 110 2005 79.3 89.0 105 2006 82.0 90.2 109 2007 81.0 90.0 108 2008 84.6 95.0 111 2009 83.7 93.0 110 2010 83.6 93.2 103 2011 83.7 94.0 111 Average (2002 - 2011) 81.2 90.4 108 2012 83.1 92.6 111 Section 3 - Page 22

Figure 3.8-2 mR/year Oconee Inner Ring (TLD) Results 220 200 180 160 140 120 100 80 60 40 20 N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW WNW NW NNW (020) (021) (022) (023) (024) (025) (026) (027) (028) (029) (030) (031) (076) (032) (033) (034) (035) 2012 1984 2011 High/Low/Mean Table 3.8-B Direct Gamma Radiation (TLD) Results Inner Ring (mR/year) 1984 - 2011 1984 - 2011 1984 - 2011 Sector Location Mean Low High 2012 N 020 8.31E+01 6.71E+01 1.36E+02 8.00E+01 NNE 021 6.06E+01 3.72E+01 9.75E+01 6.00E+01 NE 022 8.45E+01 5.44E+01 1.15E+02 9.60E+01 ENE 023 9.45E+01 7.08E+01 1.26E+02 9.52E+01 E 024 9.86E+01 8.09E+01 1.48E+02 1.06E+02 ESE 025 7.32E+01 4.67E+01 1.12E+02 7.52E+01 SE 026 7.02E+01 4.59E+01 1.21E+02 6.80E+01 SSE 027 7.18E+01 4.63E+01 1.04E+02 8.40E+01 S 028 6.86E+01 4.87E+01 1.06E+02 7.40E+01 SSW 029 6.83E+01 4.94E+01 1.07E+02 6.60E+01 SW 030 7.09E+01 5.04E+01 1.13E+02 7.40E+01 WSW 031 6.99E+01 5.04E+01 1.13E+02 7.20E+01 W 076 8.49E+01 6.97E+01 9.92E+01 9.32E+01 WNW 032 9.63E+01 7.19E+01 1.46E+02 9.92E+01 WNW 033 8.64E+01 6.77E+01 1.45E+02 8.20E+01 NW 034 1.05E+02 8.21E+01 1.89E+02 9.12E+01 NNW 035 9.24E+01 6.55E+01 1.28E+02 9.72E+01 Section 3 - Page 23

Figure 3.8-3 mR/year Oconee Outer Ring (TLD) Results 220 200 180 160 140 120 100 80 60 40 20 N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW (036) (037) (038) (039) (040) (041) (042) (043) (044) (045) (046) (047) (048) (049) (050) (051) 2012 1984 2011 High/Low/Mean Table 3.8-C Direct Gamma Radiation (TLD) Results Outer Ring (mR/year) 1984 - 2011 1984 - 2011 1984 - 2011 Sector Location Mean Low High 2012 N 036 9.97E+01 6.72E+01 1.39E+02 1.07E+02 NNE 037 8.22E+01 5.21E+01 1.22E+02 8.72E+01 NE 038 9.54E+01 6.71E+01 1.43E+02 9.00E+01 ENE 039 9.60E+01 6.14E+01 1.40E+02 1.02E+02 E 040 9.97E+01 8.05E+01 1.44E+02 1.07E+02 ESE 041 7.50E+01 5.06E+01 1.19E+02 7.52E+01 SE 042 1.01E+02 7.13E+01 1.43E+02 1.07E+02 SSE 043 9.56E+01 6.41E+01 1.45E+02 1.04E+02 S 044 7.84E+01 5.86E+01 1.29E+02 8.32E+01 SSW 045 7.29E+01 5.19E+01 1.14E+02 7.20E+01 SW 046 8.45E+01 4.55E+01 1.19E+02 9.80E+01 WSW 047 8.36E+01 5.22E+01 1.30E+02 9.40E+01 W 048 1.00E+02 5.44E+01 1.47E+02 1.04E+02 WNW 049 8.59E+01 5.33E+01 1.22E+02 9.40E+01 NW 050 7.40E+01 5.09E+01 1.01E+02 7.60E+01 NNW 051 7.81E+01 5.00E+01 1.14E+02 8.12E+01 Section 3 - Page 24

3.9 LAND USE CENSUS The Land Use Census was conducted during the growing season (6/13/2012) 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 2012 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 25

Figure 3.9 Oconee Nuclear Station 2012 Land Use Census Map Legend

ONS_Resideoce

/'../ ONS_Railroads

/V NaVleqHwys

/'V NaVleqStreEts e states o Counties NHDWaterOOdy

- t. -

I'Ioojectio<o HCSP HAO.:!l Section 3 - Page 26

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 2012 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 were detected in broadleaf vegetation, milk, airborne radioiodine or airborne particulate samples. Naturally occurring K-40 and Be-7 were detected in some samples but were not included in any REMP-based dose estimates. Dose estimates were not calculated for surface water samples because surface water is not considered a potable drinking water source although surface water tritium concentrations are used 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 2012 was 8.16E-2 mrem to the adult GI-LLI from consuming fish.

4.2 ESTIMATED DOSE FROM RELEASES Throughout the year, dose estimates were calculated based on actual 2012 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 (reference 6.6).

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 Section 4 - Page 1

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 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 2012 environmental sample results was 1.06E-1 mrem to the adult GI-LLI. The maximum total organ dose of 6.61E-1 mrem for liquid effluent-based estimates was to the adult GI-LLI.

In calculations based on gaseous release pathways, vegetation was the predominant dose pathway for effluent samples. The gaseous effluent dose is due to C-14 and tritium in broadleaf vegetation. The maximum total organ dose for gaseous effluent estimates was 3.30E-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 2012 ENVIRONMENTAL AND EFFLUENT DOSE COMPARISON LIQUID RELEASE PATHWAY Environmental (3)

Critical Critical Maximum Dose Organ or Location Age (1) Pathway (2) (mrem)

Effluent Data Skin Environmental Teen Shoreline Sediment 067 (4.34 mi SSE) 1.67E-04 Skin Effluent Teen Shoreline Sediment Discharge Pt. 3.51E-03 Bone Environmental Child Fish 063 (0.80 mi ESE) 3.43E-02 Bone Effluent Child Fish Discharge Pt. 1.46E-02 Liver Environmental Child Fish 063 (0.80 mi ESE) 7.62E-02 Liver Effluent Child Drinking Water Discharge Pt. 1.22E-01 T. Body Environmental Adult Fish 063 (0.80 mi ESE) 6.68E-02 T. Body Effluent Adult Fish Discharge Pt. 1.15E-01 Thyroid Environmental Child Drinking Water 066 (18.9 mi SSE) 4.06E-02 Thyroid Effluent Child Drinking Water 18.9 mi SSE 1.06E-01 Kidney Environmental Child Drinking Water 066 (18.9 mi SSE) 5.13E-02 Kidney Effluent Child Drinking Water 18.9 mi SSE 1.11E-01 Lung Environmental Child Drinking Water 066 (18.9 mi SSE) 4.44E-02 Lung Effluent Child Drinking Water 18.9 mi SSE 1.08E-01 GI-LLI Environmental Adult Fish 063 (0.80 mi ESE) 1.06E-01 GI-LLI Effluent Adult Fish Discharge Pt. 6.61E-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 9.07E-10 Bone Environmental - - - 0.00E+00 Bone Effluent Child Vegetation 1.0 mi. SW 3.30E-01 Liver Environmental - - - 0.00E+00 Liver Effluent Child Vegetation 1.0 mi. SW 1.22E-01 T. Body Environmental - - - 0.00E+00 T. Body Effluent Child Vegetation 1.0 mi. SW 1.22E-01 Thyroid Environmental - - - 0.00E+00 Thyroid Effluent Child Vegetation 1.0 mi. SW 1.22E-01 Kidney Environmental - - - 0.00E+00 Kidney Effluent Child Vegetation 1.0 mi. SW 1.22E-01 Lung Environmental - - - 0.00E+00 Lung Effluent Child Vegetation 1.0 mi. SW 1.22E-01 GI-LLI Environmental - - - 0.00E+00 GI-LLI Effluent Child Vegetation 1.0 mi. SW 1.22E-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 2012 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 3.27E-02 3.27E-02 3.27E-02 3.27E-02 3.27E-02 3.27E-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 3.27E-02 3.27E-02 3.27E-02 3.27E-02 3.27E-02 3.27E-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 3.33E-02 3.33E-02 3.33E-02 3.33E-02 3.33E-02 3.33E-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 3.43E-02 4.29E-02 2.07E-02 7.26E-03 1.80E-02 1.11E-02 2.37E-02 0.00E+00 Shoreline Sediment 0.00E+00 0.00E+00 2.99E-05 0.00E+00 0.00E+00 0.00E+00 0.00E+00 3.48E-05 TOTAL 3.43E-02 7.62E-02 5.40E-02 4.06E-02 5.13E-02 4.44E-02 5.70E-02 3.48E-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 1.74E-02 1.74E-02 1.74E-02 1.74E-02 1.74E-02 1.74E-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 2.72E-02 4.86E-02 2.95E-02 8.79E-03 2.11E-02 1.36E-02 5.68E-02 0.00E+00 Shoreline Sediment 0.00E+00 0.00E+00 1.43E-04 0.00E+00 0.00E+00 0.00E+00 0.00E+00 1.67E-04 TOTAL 2.72E-02 6.60E-02 4.70E-02 2.62E-02 3.85E-02 3.10E-02 7.42E-02 1.67E-04 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 2.47E-02 2.47E-02 2.47E-02 2.47E-02 2.47E-02 2.47E-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 2.54E-02 4.98E-02 4.21E-02 1.14E-02 2.32E-02 1.53E-02 8.16E-02 0.00E+00 Shoreline Sediment 0.00E+00 0.00E+00 2.56E-05 0.00E+00 0.00E+00 0.00E+00 0.00E+00 2.99E-05 TOTAL 2.54E-02 7.45E-02 6.68E-02 3.61E-02 4.79E-02 4.00E-02 1.06E-01 2.99E-05 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 2012 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-07 066 322 0.00E+00 3.27E-02 3.27E-02 3.27E-02 3.27E-02 3.27E-02 3.27E-02 Dose Commitment (mrem) = 0.00E+00 3.27E-02 3.27E-02 3.27E-02 3.27E-02 3.27E-02 3.27E-02 Section 4 - Page 6

Oconee Nuclear Station Dose from Drinking Water Pathway for 2012 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-07 066 322 0.00E+00 3.33E-02 3.33E-02 3.33E-02 3.33E-02 3.33E-02 3.33E-02 Dose Commitment (mrem) = 0.00E+00 3.33E-02 3.33E-02 3.33E-02 3.33E-02 3.33E-02 3.33E-02 Section 4 - Page 7

Oconee Nuclear Station Dose from Fish Pathway for 2012 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 = 5755 pCi/l x 0.9 = 5180 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-05 063 123 0.00E+00 1.53E-03 4.68E-03 0.00E+00 0.00E+00 0.00E+00 8.91E-03 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-05 063 36.1 0.00E+00 1.32E-03 3.89E-03 0.00E+00 0.00E+00 0.00E+00 7.30E-03 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 15.2 3.43E-02 3.28E-02 4.85E-03 0.00E+00 1.07E-02 3.85E-03 2.06E-04 H-3 NO DATA 2.03E-07 2.03E-07 2.03E-07 2.03E-07 2.03E-07 2.03E-07 063 5180 0.00E+00 7.26E-03 7.26E-03 7.26E-03 7.26E-03 7.26E-03 7.26E-03 Dose Commitment (mrem) = 3.43E-02 4.29E-02 2.07E-02 7.26E-03 1.80E-02 1.11E-02 2.37E-02 Section 4 - Page 8

Oconee Nuclear Station Dose from Shoreline Sediment Pathway for 2012 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 63.5 2.99E-05 3.48E-05 Dose Commitment (mrem) = 2.99E-05 3.48E-05 Section 4 - Page 9

Oconee Nuclear Station Dose from Drinking Water Pathway for 2012 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-07 066 322 0.00E+00 1.74E-02 1.74E-02 1.74E-02 1.74E-02 1.74E-02 1.74E-02 Dose Commitment (mrem)= 0.00E+00 1.74E-02 1.74E-02 1.74E-02 1.74E-02 1.74E-02 1.74E-02 Section 4 - Page 10

Oconee Nuclear Station Dose from Fish Pathway for 2012 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 = 5755 pCi/l x 0.9 = 5180 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-05 063 123 0.00E+00 1.91E-03 4.41E-03 0.00E+00 0.00E+00 0.00E+00 2.64E-02 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-05 063 36.1 0.00E+00 1.62E-03 3.66E-03 0.00E+00 0.00E+00 0.00E+00 2.11E-02 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 15.2 2.72E-02 3.62E-02 1.26E-02 0.00E+00 1.23E-02 4.79E-03 5.16E-04 H-3 NO DATA 1.06E-07 1.06E-07 1.06E-07 1.06E-07 1.06E-07 1.06E-07 063 5180 0.00E+00 8.79E-03 8.79E-03 8.79E-03 8.79E-03 8.79E-03 8.79E-03 Dose Commitment (mrem) = 2.72E-02 4.86E-02 2.95E-02 8.79E-03 2.11E-02 1.36E-02 5.68E-02 Section 4 - Page 11

Oconee Nuclear Station Dose from Shoreline Sediment Pathway for 2012 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 63.5 1.43E-04 1.67E-04 Dose Commitment (mrem) = 1.43E-04 1.67E-04 Section 4 - Page 12

Oconee Nuclear Station Dose from Drinking Water Pathway for 2012 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-07 066 322 0.00E+00 2.47E-02 2.47E-02 2.47E-02 2.47E-02 2.47E-02 2.47E-02 Dose Commitment (mrem) = 0.00E+00 2.47E-02 2.47E-02 2.47E-02 2.47E-02 2.47E-02 2.47E-02 Section 4 - Page 13

Oconee Nuclear Station Dose from Fish Pathway for 2012 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 = 5755 pCi/l x 0.9 = 5180 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-05 063 123 0.00E+00 1.92E-03 4.31E-03 0.00E+00 0.00E+00 0.00E+00 3.90E-02 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-05 063 36.1 0.00E+00 1.62E-03 3.58E-03 0.00E+00 0.00E+00 0.00E+00 3.05E-02 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 15.2 2.54E-02 3.48E-02 2.28E-02 0.00E+00 1.18E-02 3.93E-03 6.74E-04 H-3 NO DATA 1.05E-07 1.05E-07 1.05E-07 1.05E-07 1.05E-07 1.05E-07 063 5180 0.00E+00 1.14E-02 1.14E-02 1.14E-02 1.14E-02 1.14E-02 1.14E-02 Dose Commitment (mrem) = 2.54E-02 4.98E-02 4.21E-02 1.14E-02 2.32E-02 1.53E-02 8.16E-02 Section 4 - Page 14

Oconee Nuclear Station Dose from Shoreline Sediment Pathway for 2012 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 63.5 2.56E-05 2.99E-05 Dose Commitment (mrem) = 2.56E-05 2.99E-05 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 Energy Corporations 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 out of 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 all tritium analyses.

5.5 DUKE ENERGY INTERCOMPARISON PROGRAM EnRad Laboratories participated in the Duke Energy Nuclear Generation Department Intercomparison Program during 2012. Interlaboratory cross-check standards, including Marinelli beakers, air filters, air cartridges, gross beta in water, and tritium in Section 5 - Page 1

water samples were analyzed at various times of the year. A summary of the EnRad Laboratory program results for 2012 is documented in Table 5.0-A.

5.6 ECKERT & ZIEGLER ANALYTICS CROSS CHECK PROGRAM EnRad Laboratories participated in the Eckert & Ziegler Analytics Cross Check Program during 2012. Cross-check standards including, Marinelli beakers, air filters, tritium in water, and Iodine in milk samples were analyzed at various times of the year.

A summary of the EnRad Laboratory program results for 2012 is documented in Table 5.0-B.

5.7 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 Carolina Department of Health and Human Services, North Carolina Public Health Drinking Water Laboratory Certification Program. A summary of these proficiency test data for 2012 is documented in Table 5.0-C.

5.8 DUKE ENERGY AUDITS The Oconee Nuclear Station Radiological Environmental Monitoring Program was audited by the Quality Assurance Group in 2012 (reference 6.13). Audits at Catawba, McGuire, Oconee, and EnRad Laboratories identified procedure and report enhancements (references 6.13, 6.17, 6.18, 6.19). No environmental monitoring issues were identified.

5.9 U.S. NUCLEAR REGULATORY COMMISSION INSPECTIONS The Oconee Nuclear Station Radiological Environmental Monitoring Program was audited by the NRC in 2012 (reference 6.12). No issues were identified.

5.10 STATE OF SOUTH CAROLINA INTERCOMPARISON PROGRAM Oconee Nuclear Station routinely participates with the Bureau of Radiological Health of the States Department of Health and Environmental Control (DHEC) in an intercomparison program. The Memorandum of Agreement (MOA) between SC DHEC and Duke Energy describes the sampling frequency and analysis parameters for drinking water, surface water, milk, fish, vegetation, and shoreline sediment samples collected by EnRad Laboratories. Samples are routinely split with DHEC for intercomparison analysis. DHEC collects air samples near two of the locations sampled for air by ONS.

Results of the analyses performed on split and duplicate samples are sent to DHEC.

Section 5 - Page 2

5.11 TLD INTERCOMPARISON PROGRAM 5.11.1 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 Nuclear Technology Services Intercomparison Report is documented in Table 5.0-D.

5.11.2 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 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 2012 CROSS-CHECK RESULTS FOR ENRAD LABORATORIES Cross-Check samples are normally analyzed a minimum of three times. A status of "3 Pass" indicates that all three analyses yielded results within the designated acceptance range. A status of "2 Pass" indicates that two analyses of the cross check was performed and both analyses yielded results within the designated acceptance range. A status of "1 Pass" indicates that one analysis of the cross-check was performed and yielded results within the designated acceptance range.

If applicable, footnote explanations are included following this table.

Gamma in Water 3.5 liters Reference Sample I.D. Nuclide Acceptance Reference Mean Reported Cross Check Date Range Value Value Status pCi/l pCi/l pCi/l 2/28/2012 Q121GWR Cr-51 6.92 - 12.27 E3 9.23 E3 9.10 E3 3 Pass Mn-54 2.15 - 3.81 E3 2.87 E3 3.01 E3 3 Pass Co-58 1.64 - 2.90 E3 2.18 E3 2.18 E3 3 Pass Fe-59 2.29 - 4.06 E3 3.05 E3 3.19 E3 3 Pass Co-60 2.98 - 5.28 E3 3.97 E3 4.12 E3 3 Pass Zn-65 3.69 - 6.55 E3 4.93 E3 5.09 E3 3 Pass Cs-134 1.62 - 2.86 E3 2.15 E3 1.95 E3 3 Pass Cs-137 1.69 - 3.00 E3 2.25 E3 2.18 E3 3 Pass Ce-141 3.89 - 6.90 E3 5.19 E3 5.17 E3 3 Pass 5/31/2012 Q122GWR Cr-51 2.66 - 4.72 E3 3.55 E3 3.76 E3 3 Pass Mn-54 6.35 - 11.26 E2 8.46 E2 9.00 E2 3 Pass Co-58 4.96 - 8.80 E2 6.62 E2 6.78 E2 3 Pass Fe-59 7.41 - 13.13 E2 9.87 E2 10.73 E2 3 Pass Co-60 1.67 - 2.96 E3 2.22 E3 2.31 E3 3 Pass Zn-65 0.97 - 1.71 E3 1.29 E3 1.40 E3 3 Pass Cs-134 0.83 - 1.47 E3 1.10 E3 1.06 E3 3 Pass Cs-137 0.99 - 1.76 E3 1.32 E3 1.30 E3 3 Pass Ce-141 5.19 - 9.20 E2 6.92 E2 7.20 E2 3 Pass 8/23/2012 Q123GWSL Cr-51 1.76 - 3.12 E5 2.34 E5 2.24 E5 3 Pass Mn-54 0.84 - 1.49 E5 1.12 E5 1.12 E5 3 Pass Co-58 5.08 - 9.01 E4 6.77 E4 6.54 E4 3 Pass Fe-59 0.87 - 1.55 E5 1.17 E5 1.19 E5 3 Pass Co-60 6.27 - 11.12 E4 8.36 E4 8.52 E4 3 Pass Zn-65 0.84 - 1.48 E5 1.11 E5 1.14 E5 3 Pass Cs-134 4.50 - 7.99 E4 6.00 E4 5.57 E4 3 Pass Cs-137 7.12 - 12.63 E4 9.50 E4 8.71 E4 3 Pass Ce-141 1.07 - 1.89 E5 1.42 E5 1.37 E5 3 Pass Section 5 - Page 4

Gamma in Water 3.5 liters, continued Reference Sample I.D. Nuclide Acceptance Reference Mean Reported Cross Check Date Range Value Value Status pCi/l pCi/l pCi/l 12/3/2012 Q124GWR Cr-51 6.84 - 12.10 E3 9.12 E3 9.19 E3 2 Pass Mn-54 2.12 - 3.75 E3 2.82 E3 2.92 E3 2 Pass Co-58 1.86 -3.30 E3 2.48 E3 2.48 E3 2 Pass Fe-59 2.21 - 3.92 E3 2.95 E3 3.09 E3 2 Pass Co-60 3.11 - 5.51 E3 4.14 E3 4.36 E3 2 Pass Zn-65 3.42 - 6.06 E3 4.56 E3 4.74 E3 2 Pass Cs-134 3.04 - 5.39 E3 4.05 E3 3.98 E3 2 Pass Cs-137 2.13 - 3.78 E3 2.84 E3 2.72 E3 2 Pass Ce-141 0.99 - 1.76 E3 1.32 E3 1.36 E3 2 Pass Gamma in Water 1.0 liter Reference Sample I.D. Nuclide Acceptance Reference Mean Reported Cross Check Date Range Value Value Status pCi/l pCi/l pCi/l 2/28/2012 Q121GWR Cr-51 6.92 - 12.27 E3 9.23 E3 8.95 E3 3 Pass Mn-54 2.15 - 3.81 E3 2.87 E3 2.87 E3 3 Pass Co-58 1.64 - 2.90 E3 2.18 E3 2.07 E3 3 Pass Fe-59 2.29 - 4.06 E3 3.05 E3 3.05 E3 3 Pass Co-60 2.98 - 5.28 E3 3.97 E3 3.93 E3 3 Pass Zn-65 3.69 - 6.55 E3 4.93 E3 4.85 E3 3 Pass Cs-134 1.62 - 2.86 E3 2.15 E3 1.86 E3 3 Pass Cs-137 1.69 - 3.00 E3 2.25 E3 2.08 E3 3 Pass Ce-141 3.89 - 6.90 E3 5.19 E3 4.85 E3 3 Pass 5/31/2012 Q122GWR Cr-51 2.66 - 4.72 E3 3.55 E3 3.69 E3 3 Pass Mn-54 6.35 - 11.26 E2 8.46 E2 8.96 E2 3 Pass Co-58 4.96 - 8.80 E2 6.62 E2 6.64 E2 3 Pass Fe-59 7.41 - 13.13 E2 9.87 E2 10.53 E2 3 Pass Co-60 1.67 - 2.96 E3 2.22 E3 2.27 E3 3 Pass Zn-65 0.97 - 1.71 E3 1.29 E3 1.39 E3 3 Pass Cs-134 0.83 - 1.47 E3 1.10 E3 1.04 E3 3 Pass Cs-137 0.99 - 1.76 E3 1.32 E3 1.29 E3 3 Pass Ce-141 5.19 - 9.20 E2 6.92 E2 6.86 E2 3 Pass 8/23/2012 Q123GWSL Cr-51 1.76 - 3.12 E5 2.34 E5 2.23 E5 3 Pass Mn-54 0.84 - 1.49 E5 1.12 E5 1.12 E5 3 Pass Co-58 5.08 - 9.01 E4 6.77 E4 6.64 E4 3 Pass Fe-59 0.87 - 1.55 E5 1.17 E5 1.19 E5 3 Pass Co-60 6.27 - 11.12 E4 8.36 E4 8.42 E4 3 Pass Zn-65 0.84 - 1.48 E5 1.11 E5 1.13 E5 3 Pass Cs-134 4.50 - 7.99 E4 6.00 E4 5.62 E4 3 Pass Cs-137 7.12 - 12.63 E4 9.50 E4 8.84 E4 3 Pass Ce-141 1.07 - 1.89 E5 1.42 E5 1.36 E5 3 Pass Section 5 - Page 5

Gamma in Water 1.0 liter, continued Reference Sample I.D. Nuclide Acceptance Reference Mean Reported Cross Check Date Range Value Value Status pCi/l pCi/l pCi/l 12/3/2012 Q124GWR Cr-51 6.84 - 12.10 E3 9.12 E3 9.55 E3 1 Pass Mn-54 2.12 - 3.75 E3 2.82 E3 3.07 E3 1 Pass Co-58 1.86 -3.30 E3 2.48 E3 2.60 E3 1 Pass Fe-59 2.21 - 3.92 E3 2.95 E3 3.24 E3 1 Pass Co-60 3.11 - 5.51 E3 4.14 E3 4.49 E3 1 Pass Zn-65 3.42 - 6.06 E3 4.56 E3 5.08 E3 1 Pass Cs-134 3.04 - 5.39 E3 4.05 E3 3.98 E3 1 Pass Cs-137 2.13 - 3.78 E3 2.84 E3 2.84 E3 1 Pass Ce-141 0.99 - 1.76 E3 1.32 E3 1.38 E3 1 Pass Gamma in Water 0.5 liter Reference Sample I.D. Nuclide Acceptance Reference Mean Reported Cross Check Date Range Value Value Status pCi/l pCi/l pCi/l 2/28/2012 Q121GWR Cr-51 6.92 - 12.27 E3 9.23 E3 8.85 E3 3 Pass Mn-54 2.15 - 3.81 E3 2.87 E3 2.90 E3 3 Pass Co-58 1.64 - 2.90 E3 2.18 E3 2.07 E3 3 Pass Fe-59 2.29 - 4.06 E3 3.05 E3 3.11 E3 3 Pass Co-60 2.98 - 5.28 E3 3.97 E3 3.96 E3 3 Pass Zn-65 3.69 - 6.55 E3 4.93 E3 4.93 E3 3 Pass Cs-134 1.62 - 2.86 E3 2.15 E3 1.81 E3 3 Pass Cs-137 1.69 - 3.00 E3 2.25 E3 2.08 E3 3 Pass Ce-141 3.89 - 6.90 E3 5.19 E3 4.91 E3 3 Pass 5/31/2012 Q122GWR Cr-51 2.66 - 4.72 E3 3.55 E3 3.65 E3 3 Pass Mn-54 6.35 - 11.26 E2 8.46 E2 8.84 E2 3 Pass Co-58 4.96 - 8.80 E2 6.62 E2 6.50 E2 3 Pass Fe-59 7.41 - 13.13 E2 9.87 E2 10.73 E2 3 Pass Co-60 1.67 - 2.96 E3 2.22 E3 2.23 E3 3 Pass Zn-65 0.97 - 1.71 E3 1.29 E3 1.38 E3 3 Pass Cs-134 0.83 - 1.47 E3 1.10 E3 0.97 E3 3 Pass Cs-137 0.99 - 1.76 E3 1.32 E3 1.26 E3 3 Pass Ce-141 5.19 - 9.20 E2 6.92 E2 6.77 E2 3 Pass 8/23/2012 Q123GWSL Cr-51 1.76 - 3.12 E5 2.34 E5 2.28 E5 3 Pass Mn-54 0.84 - 1.49 E5 1.12 E5 1.15 E5 3 Pass Co-58 5.08 - 9.01 E4 6.77 E4 6.68 E4 3 Pass Fe-59 0.87 - 1.55 E5 1.17 E5 1.22 E5 3 Pass Co-60 6.27 - 11.12 E4 8.36 E4 8.61 E4 3 Pass Zn-65 0.84 - 1.48 E5 1.11 E5 1.17 E5 3 Pass Cs-134 4.50 - 7.99 E4 6.00 E4 5.56 E4 3 Pass Cs-137 7.12 - 12.63 E4 9.50 E4 8.97 E4 3 Pass Ce-141 1.07 - 1.89 E5 1.42 E5 1.38 E5 3 Pass Section 5 - Page 6

Gamma in Water 0.5 liter, continued Reference Sample I.D. Nuclide Acceptance Reference Mean Reported Cross Check Date Range Value Value Status pCi/l pCi/l pCi/l 12/3/2012 Q124GWR Cr-51 6.84 - 12.10 E3 9.12 E3 9.30 E3 1 Pass Mn-54 2.12 - 3.75 E3 2.82 E3 2.88 E3 1 Pass Co-58 1.86 -3.30 E3 2.48 E3 2.44 E3 1 Pass Fe-59 2.21 - 3.92 E3 2.95 E3 3.13 E3 1 Pass Co-60 3.11 - 5.51 E3 4.14 E3 4.26 E3 1 Pass Zn-65 3.42 - 6.06 E3 4.56 E3 4.74 E3 1 Pass Cs-134 3.04 - 5.39 E3 4.05 E3 3.84 E3 1 Pass Cs-137 2.13 - 3.78 E3 2.84 E3 2.69 E3 1 Pass Ce-141 0.99 - 1.76 E3 1.32 E3 1.33 E3 1 Pass Gamma in Water 0.25 liter Reference Sample I.D. Nuclide Acceptance Reference Mean Reported Cross Check Date Range Value Value Status pCi/l pCi/l pCi/l 2/28/2012 Q121GWR Cr-51 6.92 - 12.27 E3 9.23 E3 8.90 E3 3 Pass Mn-54 2.15 - 3.81 E3 2.87 E3 2.95 E3 3 Pass Co-58 1.64 - 2.90 E3 2.18 E3 2.11 E3 3 Pass Fe-59 2.29 - 4.06 E3 3.05 E3 3.10 E3 3 Pass Co-60 2.98 - 5.28 E3 3.97 E3 3.93 E3 3 Pass Zn-65 3.69 - 6.55 E3 4.93 E3 4.96 E3 3 Pass Cs-134 1.62 - 2.86 E3 2.15 E3 1.82 E3 3 Pass Cs-137 1.69 - 3.00 E3 2.25 E3 2.11 E3 3 Pass Ce-141 3.89 - 6.90 E3 5.19 E3 4.91 E3 3 Pass Gamma in Filter Reference Sample I.D. Nuclide Acceptance Reference Mean Reported Cross Check Date Range Value Value Status pCi pCi pCi 9/13/2012 E10237 Cr-51 1.61 - 2.85 E2 2.14 E2 2.04 E2 1 Pass Mn-54 1.27 - 2.25 E2 1.69 E2 1.68 E2 1 Pass Co-58 6.50 - 11.53 E1 8.67 E1 8.43 E1 1 Pass Fe-59 0.96 - 1.79 E2 1.31 E2 1.31 E2 1 Pass Co-60 0.98 - 1.74 E2 1.31 E2 1.36 E2 1 Pass Zn-65 1.25 - 2.21 E2 1.66 E2 1.70 E2 1 Pass Cs-134 7.01 - 12.42 E1 9.34 E1 9.12 E1 1 Pass Cs-137 1.13 - 2.00 E2 1.50 E2 1.37 E2 1 Pass Ce-141 1.06 - 1.88 E2 1.41 E2 1.34 E2 1 Pass 12/6/2012 E10318 Cr-51 2.81 - 4.99 E2 3.75 E2 3.14 E2 1 Pass Mn-54 0.94 - 1.66 E2 1.25 E2 1.20 E2 1 Pass Co-58 0.80 - 1.41 E1 1.06 E2 1.05 E2 1 Pass Fe-59 0.94 - 1.66 E2 1.25 E2 1.29 E2 1 Pass Co-60 1.38 - 2.45 E2 1.84 E2 1.95 E2 1 Pass Zn-65 1.51 - 2.67 E2 2.01 E2 1.84 E2 1 Pass Cs-134 1.34 - 2.38 E1 1.79 E2 1.71 E2 1 Pass Cs-137 0.95 - 1.68 E2 1.26 E2 1.19 E2 1 Pass Ce-141 4.13 - 7.33 E1 5.51 E1 4.60 E1 1 Pass Section 5 - Page 7

Iodine in Milk Reference Sample I.D. Nuclide Acceptance Reference Mean Reported Cross Check Date Range Value Value Status pCi/l pCi/l pCi/l 7/17/2012 Q123LIM1 I-131 1.44 - 2.55 E2 1.92 E2 1.95 E2 3 Pass 7/17/2012 Q123LIM2 I-131 1.52 - 2.70 E3 2.03 E3 2.09 E3 3 Pass 7/17/2012 Q123LIM3 I-131 4.28 - 7.58 E2 5.70 E2 5.90 E2 3 Pass Iodine on Cartridge Reference Sample I.D. Nuclide Acceptance Reference Mean Reported Cross Check Date Range Value Value Status pCi pCi pCi 9/13/2012 E10238 I-131 7.29 - 12.93 E1 9.72 E1 10.02 E1 2 Pass 12/6/2012 E10319 I-131 5.45 - 9.67 E1 7.27 E1 7.50 E1 3 Pass Beta in Water Reference Sample I.D. Nuclide Acceptance Reference Mean Reported Cross Check Date Range Value Value Status pCi/l pCi/l pCi/l 6/6/2012 Q122ABW1 Cs-137 6.89 - 12.21 E1 9.18 E1 9.22 E1 3 Pass 6/6/2012 Q122ABW2 Cs-137 2.89 - 5.12 E2 3.85 E2 3.99 E2 3 Pass 6/6/2012 Q122ABW3 Cs-137 1.71 - 3.03 E2 2.28 E2 2.34 E2 3 Pass Beta Air Particulate Reference Sample I.D. Nuclide Acceptance Reference Mean Reported Cross Check Date Range Value Value Status pCi pCi pCi 5/11/2012 A27290A Cs-137 6.40 - 11.34 E2 8.53 E2 8.51 E2 3 Pass 8/17/2012 A27829 Cs-137 6.05 - 10.72 E2 8.06 E2 7.76 E2 3 Pass Section 5 - Page 8

Tritium in Water Reference Sample I.D. Nuclide Acceptance Reference Mean Reported Cross Check Date Range Value Value Status pCi/l pCi/l pCi/l 2/28/2012 Q121TWR1 H-3 1.45 - 2.57 E6 1.93 E6 1.94 E6 3 Pass 2/28/2012 Q121TWR2 H-3 3.22 - 5.70 E5 4.29 E5 4.33 E5 3 Pass 2/28/2012 Q121TWR3 H-3 4.83 - 8.57 E3 6.44 E3 6.43 E3 3 Pass 5/31/2012 Q122TWR1 H-3 7.49 - 13.28 E3 9.98 E3 10.07 E3 3 Pass 5/31/2012 Q122TWR2 H-3 5.35 - 9.49 E2 7.14 E2 7.17 E2 3 Pass 5/31/2012 Q122TWR3 H-3 1.85 - 3.28 E3 2.47 E3 2.46 E3 3 Pass 8/23/2012 Q123TWR1 H-3 5.05 - 8.96 E5 6.74 E5 6.81 E5 3 Pass 8/23/2012 Q123TWR2 H-3 2.17 - 3.85 E6 2.89 E6 2.89 E6 3 Pass 8/23/2012 Q123TWR3 H-3 4.96 - 8.80 E2 6.61 E2 7.26 E2 3 Pass Section 5 - Page 9

TABLE 5.0-B ECKERT & ZIEGLER ANALYTICS CROSS CHECK PROGRAM 2012 CROSS-CHECK RESULTS FOR ENRAD LABORATORIES Cross-Check samples are received, prepared, and analyzed. Results are reported directly to Eckert & Ziegler Analytics If applicable, footnote explanations are included following this table Gamma in Water 3.5 liters Acceptance Reference Reported Reference Range Value Value Cross Check Date Sample I.D. Nuclide Ratio pCi/l pCi/l Ratio Status 3/15/2012 E10049 I-131 0.80 - 1.20 9.38E+01 9.78E+01 1.04 Pass Ce-141 0.80 - 1.20 1.84E+02 1.90E+02 1.03 Pass Cr-51 0.80 - 1.20 3.09E+02 3.14E+02 1.02 Pass Cs-134 0.80 - 1.20 1.06E+02 9.65E+01 0.91 Pass Cs-137 0.80 - 1.20 1.13E+02 1.12E+02 1.00 Pass Co-58 0.80 - 1.20 9.34E+01 9.33E+01 1.00 Pass Mn-54 0.80 - 1.20 1.38E+02 1.45E+02 1.05 Pass Fe-59 0.80 - 1.20 1.19E+02 1.31E+02 1.10 Pass Zn-65 0.80 - 1.20 2.35E+02 2.42E+02 1.03 Pass Co-60 0.80 - 1.20 1.97E+02 2.10E+02 1.07 Pass 9/13/2012 E10242 I-131 0.80 - 1.20 9.99E+01 1.05E+02 1.05 Pass Ce-141 0.80 - 1.20 2.51E+02 2.56E+02 1.02 Pass Cr-51 0.80 - 1.20 3.80E+02 4.08E+02 1.07 Pass Cs-134 0.80 - 1.20 1.66E+02 1.52E+02 0.92 Pass Cs-137 0.80 - 1.20 2.67E+02 2.58E+02 0.97 Pass Co-58 0.80 - 1.20 1.54E+02 1.50E+02 0.97 Pass Mn-54 0.80 - 1.20 3.00E+02 3.06E+02 1.02 Pass Fe-59 0.80 - 1.20 2.33E+02 2.45E+02 1.05 Pass Zn-65 0.80 - 1.20 2.95E+02 3.16E+02 1.07 Pass Co-60 0.80 - 1.20 2.33E+02 2.43E+02 1.04 Pass Gamma in Milk Acceptance Reference Reported Reference Range Value Value Cross Check Date Sample I.D. Nuclide Ratio pCi/l pCi/l Ratio Status 6/14/2012 E10142 I-131 0.80 - 1.20 9.97E+01 9.84E+01 0.99 Pass Ce-141 0.80 - 1.20 8.22E+01 8.25E+01 1.00 Pass Cr-51 0.80 - 1.20 4.02E+02 4.20E+02 1.05 Pass Cs-134 0.80 - 1.20 1.74E+02 1.59E+02 0.91 Pass Cs-137 0.80 - 1.20 2.12E+02 2.11E+02 1.00 Pass Co-58 0.80 - 1.20 9.23E+01 9.37E+01 1.01 Pass Mn-54 0.80 - 1.20 1.32E+02 1.35E+02 1.02 Pass Fe-59 0.80 - 1.20 1.28E+02 1.37E+02 1.07 Pass Zn-65 0.80 - 1.20 1.99E+02 2.05E+02 1.03 Pass Co-60 0.80 - 1.20 3.55E+02 3.64E+02 1.02 Pass Section 5 - Page 10

Gamma in Filter Acceptance Reference Reported Reference Range Value Value Cross Check Date Sample I.D. Nuclide Ratio pCi pCi Ratio Status 6/14/2012 E10138 Ce-141 0.80 - 1.20 7.50E+01 8.35E+01 1.11 Pass Cr-51 0.80 - 1.20 3.66E+02 3.71E+02 1.01 Pass Cs-134 0.80 - 1.20 1.59E+02 1.64E+02 1.03 Pass Cs-137 0.80 - 1.20 1.93E+02 1.89E+02 0.98 Pass Co-58 0.80 - 1.20 8.42E+01 8.93E+01 1.06 Pass Mn-54 0.80 - 1.20 1.21E+02 1.24E+02 1.03 Pass Fe-59 0.80 - 1.20 1.17E+02 1.32E+02 1.13 Pass Zn-65 0.80 - 1.20 1.82E+02 2.02E+02 1.11 Pass Co-60 0.80 - 1.20 3.24E+02 3.42E+02 1.05 Pass 9/13/2012 E10244 Ce-141 0.80 - 1.20 1.29E+02 1.32E+02 1.03 Pass Cr-51 0.80 - 1.20 1.95E+02 2.04E+02 1.05 Pass Cs-134 0.80 - 1.20 8.51E+01 8.90E+01 1.05 Pass Cs-137 0.80 - 1.20 1.37E+02 1.40E+02 1.02 Pass Co-58 0.80 - 1.20 7.89E+01 8.59E+01 1.09 Pass Mn-54 0.80 - 1.20 1.54E+02 1.63E+02 1.06 Pass Fe-59 0.80 - 1.20 1.19E+02 1.36E+02 1.14 Pass Zn-65 0.80 - 1.20 1.51E+02 1.67E+02 1.10 Pass Co-60 0.80 - 1.20 1.19E+02 1.30E+02 1.09 Pass

`

Iodine in Milk Acceptance Reference Reported Reference Range Value Value Cross Check Date Sample I.D. Nuclide Ratio pCi/l pCi/l Ratio Status 9/13/2012 E10239 I-131 0.80 - 1.20 9.98E+01 1.00E+02 1.00 Pass I-131 in Charcoal Cartridge Acceptance Reference Reported Reference Range Value Value Cross Check Date Sample I.D. Nuclide Ratio pCi pCi Ratio Status 6/14/2012 E10139 I-131 0.80 - 1.20 9.73E+01 9.24E+01 0.95 Pass Beta in Water Acceptance Reference Reported Reference Range Value Value Cross Check Date Sample I.D. Nuclide Ratio pCi/l pCi/l Ratio Status 6/14/2012 E10140 Cs-137 0.80 - 1.20 1.48E+02 1.63E+02 1.10 Pass Beta in Air Filter Acceptance Reference Reported Reference Range Value Value Cross Check Date Sample I.D. Nuclide Ratio pCi pCi Ratio Status 3/15/2012 E10050A Cs-137 0.80 - 1.20 1.61E+02 1.62E+02 1.01 Pass 9/13/2012 E10240 Cs-137 0.80 - 1.20 1.67E+02 1.52E+02 0.91 Pass 9/13/2012 E10241 Cs-137 0.80 - 1.20 9.10E+01 8.46E+01 0.93 Pass Section 5 - Page 11

Tritium in Water Acceptance Reference Reported Reference Range Value Value Cross Check Date Sample I.D. Nuclide Ratio pCi/l pCi/l Ratio Status 3/15/2012 E10052 H-3 0.80 - 1.20 4.47E+03 4.28E+03 0.96 Pass 6/14/2012 E10141 H-3 0.80 - 1.20 4.97E+03 4.70E+03 0.95 Pass 9/13/2012 E10243 H-3 0.80 - 1.20 1.30E+04 1.31E+04 1.01 Pass Section 5 - Page 12

TABLE 5.0-C ENVIRONMENTAL RESOURCE ASSOCIATES (ERA)

PROFICIENCY TESTING 2012 PROFICIENCY TEST RESULTS FOR ENRAD LABORATORIES North Carolina Department of Health and Human Services Laboratory Certification EnRad Laboratories, Laboratory Number 37817 Proficiency test samples are received, prepared, analyzed, and reported to Environmental Resource Associates as described in the instruction package within the study period. Proficiency test data are reported to ERA for evaluation. ERA reports proficiency test results to the North Carolina Department of Health and Human Services, North Carolina Public Drinking Water Laboratory Certification Program.

If applicable, footnote explanations are included following this data table.

Gamma Emitters in Water Reference Sample I.D. Nuclide Acceptance Reference Reported Proficiency Check Date Range Value Value Status pCi/l pCi/l pCi/l 4/9/2012 RAD-89* Ba-133 69.1 - 90.5 8.23E+01 8.21E+01 Pass Cs-134 60.6 - 81.6 7.42E+01 6.86E+01 Pass Cs-137 140 - 172 1.55E+02 1.45E+02 Pass Co-60 65.6 - 82.6 7.29E+01 7.78E+01 Pass Zn-65 94.5 - 125 1.05E+02 1.14E+02 Pass 10/5/2012 RAD-91** Ba-133 71.3 - 93.3 8.48E+01 8.60E+01 Pass Cs-134 62.6 - 84.3 7.66E+01 6.41E+01 Pass Cs-137 165 - 203 1.83E+02 1.68E+02 Pass Co-60 70.5 - 88.5 7.83E+01 7.88E+01 Pass Zn-65 184 - 240 2.04E+02 2.09E+02 Pass Tritium in Water Reference Sample I.D. Nuclide Acceptance Reference Reported Proficiency Check Date Range Value Value Status pCi/l pCi/l pCi/l 4/9/2012 RAD-89* H-3 13800 - 17400 1.58E+04 1.52E+04 Pass 10/5/2012 RAD-91** H-3 4190 - 5380 4.89E+03 4.80E+03 Pass

ERA study period 4/9/2012 - 5/24/2012, ERA data report issue date 6/4/2012

- ERA study period 10/5/2012 - 11/19/2012, ERA data report issue date 11/28/2012 Section 5 - Page 13

I-131 in Water Reference Sample I.D. Nuclide Acceptance Reference Reported Proficiency Check Date Range Value Value Status pCi/l pCi/l pCi/l 10/5/2012 RAD-91** I-131 20.6 - 29.4 2.48E+01 2.47E+01 Pass

ERA study period 4/9/2012 - 5/24/2012, ERA data report issue date 6/4/2012

- ERA study period 10/5/2012 - 11/19/2012, ERA data report issue date 11/28/2012 Section 5 - Page 14

TABLE 5.0-D 2012 ENVIRONMENTAL DOSIMETER CROSS-CHECK RESULTS Nuclear Technology Services 1st Quarter 2012 2nd Quarter 2012 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 102442 78.8 77.4 1.81 <+/-15% Pass 102414 17.4 17.0 2.29 <+/-15% Pass 102257 83.0 77.4 7.22 <+/-15% Pass 102430 17.9 17.0 5.00 <+/-15% Pass 102337 77.7 77.4 0.40 <+/-15% Pass 102462 18.0 17.0 5.94 <+/-15% Pass 102221 78.3 77.4 1.15 <+/-15% Pass 102490 16.9 17.0 -0.65 <+/-15% Pass 102483 82.3 77.4 6.37 <+/-15% Pass 102523 18.4 17.0 8.35 <+/-15% Pass Average Bias (B) 3.39 Average Bias (B) 4.19 Standard Deviation (S) 3.16 Standard Deviation (S) 3.47 Measure Performance lBl+S 6.55 <15% Pass Measure Performance lBl+S 7.65 <15% Pass 3rd Quarter 2012 4th Quarter 2012 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 102508 76.2 74.7 2.02 <+/-15% Pass 102432 94.0 90.4 3.94 <+/-15% Pass 102393 75.3 74.7 0.87 <+/-15% Pass 102452 95.9 90.4 6.07 <+/-15% Pass 102281 77.2 74.7 3.29 <+/-15% Pass 102453 94.1 90.4 4.09 <+/-15% Pass 102373 77.6 74.7 3.84 <+/-15% Pass 102455 99.6 90.4 10.10 <+/-15% Pass 102311 78.0 74.7 4.47 <+/-15% Pass 102473 91.8 90.4 1.56 <+/-15% Pass Average Bias (B) 2.90 Average Bias (B) 5.15 Standard Deviation (S) 1.45 Standard Deviation (S) 3.19 Measure Performance lBl+S 4.35 <15% Pass Measure Performance lBl+S 8.34 <15% Pass Section 5 - Page 15

Internal Crosscheck (Duke Energy) 1st Quarter 2012 2nd Quarter 2012 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 102046 32.6 33.0 -1.27 <+/-15% Pass 102468 34.2 35.0 -2.26 <+/-15% Pass 102017 32.1 33.0 -2.82 <+/-15% Pass 102437 35.4 35.0 1.00 <+/-15% Pass 102250 32.2 33.0 -2.42 <+/-15% Pass 102371 34.0 35.0 -2.77 <+/-15% Pass 102082 32.0 33.0 -3.12 <+/-15% Pass 102402 34.2 35.0 -2.40 <+/-15% Pass 102339 32.0 33.0 -3.15 <+/-15% Pass 102406 35.6 35.0 1.66 <+/-15% Pass 102332 31.9 33.0 -3.48 <+/-15% Pass 102012 34.3 35.0 -2.14 <+/-15% Pass 102436 32.0 33.0 -3.18 <+/-15% Pass 102496 32.1 35.0 -8.29 <+/-15% Pass 102255 32.4 33.0 -1.97 <+/-15% Pass 102391 34.2 35.0 -2.34 <+/-15% Pass 102238 32.6 33.0 -1.36 <+/-15% Pass 102407 34.8 35.0 -0.63 <+/-15% Pass 101256 31.1 33.0 -5.88 <+/-15% Pass 102336 35.2 35.0 0.51 <+/-15% Pass Average Bias (B) -2.87 Average Bias (B) -1.77 Standard Deviation (S) 1.31 Standard Deviation (S) 2.80 Measure Performance lBl+S 4.18 <15% Pass Measure Performance lBl+S 4.56 <15% Pass 3rd Quarter 2012 4th Quarter 2012 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 102149 39.1 40.0 -2.27 <+/-15% Pass 102258 30.6 30.0 2.03 <+/-15% Pass 102318 38.9 40.0 -2.78 <+/-15% Pass 102373 29.2 30.0 -2.70 <+/-15% Pass 102364 38.6 40.0 -3.55 <+/-15% Pass 102001 30.0 30.0 0.07 <+/-15% Pass 102433 39.6 40.0 -1.00 <+/-15% Pass 102311 29.0 30.0 -3.50 <+/-15% Pass 102434 39.7 40.0 -0.78 <+/-15% Pass 102296 28.9 30.0 -3.60 <+/-15% Pass 102083 38.3 40.0 -4.20 <+/-15% Pass 102281 29.1 30.0 -2.97 <+/-15% Pass 102019 38.4 40.0 -4.13 <+/-15% Pass 102227 30.5 30.0 1.53 <+/-15% Pass 102280 38.0 40.0 -5.03 <+/-15% Pass 102393 29.0 30.0 -3.30 <+/-15% Pass 102154 39.1 40.0 -2.20 <+/-15% Pass 102163 28.9 30.0 -3.70 <+/-15% Pass 102286 37.9 40.0 -5.28 <+/-15% Pass 102248 30.0 30.0 0.00 <+/-15% Pass Average Bias (B) -3.12 Average Bias (B) -1.61 Standard Deviation (S) 1.57 Standard Deviation (S) 2.27 Measure Performance lBl+S 4.69 <15% Pass Measure Performance lBl+S 3.88 <15% Pass Section 5 - Page 16

6.0 REFERENCES

6.1 Oconee Selected License Commitment Manual 6.2 Oconee Technical Specifications 6.3 Oconee Updated Final Safety Analysis Report 6.4 Oconee Offsite Dose Calculation Manual 6.5 Oconee Annual Radiological Environmental Operating Report 1969-2011 6.6 Oconee Annual Radioactive Effluent Release Report 2012 6.7 Probability and Statistics in Engineering and Management Science, Hines and Montgomery, 1969, pages 287-293.

6.8 Practical Statistics for the Physical Sciences, Havilcek and Crain, 1988, pages 83-93.

6.9 Nuclear Regulatory Commission Regulatory Guide 1.109, Calculation of Annual Doses to Man from Routine Releases of Reactor Effluents for the Purposes of Evaluating Compliance with 10CFR50, Appendix I.

6.10 EnRad Laboratories Operating Procedures 6.11 RETDAS, Radiological Effluent Tracking and Dose Assessment Software, Canberra Version 3.5.1, DPC Revision #4.0 6.12 NRC Integrated Inspection Report 05000269/2012004, 05000270/2012004, 05000287/2012004 6.13 Radiological Effluent Controls Audit 12-19 (NOS)(REC)(ONS) 6.14 Problem Investigation Program Database, V 3.4.3, Duke Energy Company, O-12-14486 6.15 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).

6.16 Problem Investigation Program Database, V 3.4.3, Duke Energy Company, G-10-01378 6.17 Radiological Effluent Controls Audit 12-18 (NOS)(REC)(CNS) 6.18 Radiological Effluent Controls Audit 12-20 (NOS)(REC)(MNS) 6.19 Radiological Effluent Controls Audit 12-21 (NOS)(REC)(NGO)

Section 6 - Page 1

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 Indicator location 085 (Air Radioiodine, Air Particulate) was added as a replacement for indicator location 074 (Air Radioiodine, Air Particulate), which was removed from the program (reference 6.16) since the location was determined to be located too close to a municipal waste treatment facility.

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 tritium spike and blank to verify instrument performance and sample preparation technique are acceptable.

Appendix A - Page 2

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

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

III. CHANGE OF ANALYSIS PROCEDURES No analysis procedures were changed during 2012.

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 and air particulate. A weekly gross beta analysis was performed on each filter. The continuous composite samples were collected from the locations listed below.

Location 074 = Keowee Key Resort (2.36 mi. NNW)

Programmatic sampling terminated 9/17/2012, reference 6.16 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)

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

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

Programmatic sampling initiated 9/17/2012, reference 6.16 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)

Location 066 = Anderson (18.9 mi SSE)

Appendix A - Page 3

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

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

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

A.4 MILK Semimonthly grab samples were collected at one location. A gamma and low-level Iodine-131 analysis was performed on each sample. The semimonthly grab samples were collected from the location listed below.

Location 071 = Clemson Dairy (10.2 mi. SSE)

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)

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)

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)

Appendix A - Page 4

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 6/13/2012. Results are shown in Table 3.9. No changes were made to the sampling procedures during 2012 as a result of the 2012 census.

V. GLOBAL POSITIONING SYSTEM (GPS) ANALYSIS The Oconee site centerline used for GPS measurements was referenced from the Oconee Nuclear Station Updated Final Safety Analysis Report (UFSAR), section 2.1.1.1, Specification of Location. Waypoint coordinates used for ONS GPS measurements were latitude 34°-47'-38.2"N and longitude 82°-53'-55.4"W. Maps and tables were generated using North American Datum (NAD) 27. Data normally reflect accuracy to within 2 to 5 meters from point of measurement. GPS field measurements were taken as close as possible to the item of interest. Distances for the locations are displayed using three significant figures.

Appendix A - Page 5

APPENDIX B RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

OF RESULTS 2012 Appendix B - Page 1

Environmental Radiological Monitoring Program Summary Facility: Oconee Nuclear Station Docket No. 50-269,270,287 Location: Oconee County, South Carolina Report Period: 01-JAN-2012 to 31-DEC-2012 Type and No. of Non-Medium or Location with Highest Total Lower Limit Control Routine Pathway All Indicator Locations Annual Mean Number of Detection Location Report Sampled Name, Distance, Direction of Meas.

Unit of Analyses Mean (Fraction) Location Mean (Fraction) Mean (Fraction)

(LLD)

Measurement Performed Range Code Range Range Air Particulate (pCi/m3) 081 (9.33 mi SE)

BETA 312 1.00E-02 2.09E-2 (260/260) 085 2.63E-2 (15/15) 1.97E-2 (52/52) 0 7.49E 3.90E-2 (0.88 mi NNW) 1.43E 3.63E-2 1.04E 3.28E-2 CS-134 312 5.00E-02 0.00 (0/260) 0.00 (0/15) 0.00 (0/52) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 CS-137 312 6.00E-02 0.00 (0/260) 0.00 (0/15) 0.00 (0/52) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 I-131 312 7.00E-02 0.00 (0/260) 0.00 (0/15) 0.00 (0/52) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 Mean and range based upon detectable measurements only Fraction of detectable measurements at specified locations is indicated in parentheses, (Fraction)

Zero range indicates no detectable activity measurements Report Generated @ 5/6/2013 10:58 AM Appendix B - Page 2

Environmental Radiological Monitoring Program Summary Facility: Oconee Nuclear Station Docket No. 50-269,270,287 Location: Oconee County, South Carolina Report Period: 01-JAN-2012 to 31-DEC-2012 No. of Non-Medium or Type and Total Lower Location with Highest All Indicator Control Routine Pathway Number Limit of Annual Mean Locations Location Report Sampled of Detection Name, Distance, Direction Meas.

Unit of Analyses Mean (Fraction) Location Mean (Fraction) Mean (Fraction)

(LLD)

Measurement Performed Range Code Range Range Air Radioiodine (pCi/m3) 081 (9.33 mi SE)

CS-134 312 5.00E-02 0.00 (0/260) 0.00 (0/52) 0.00 (0/52) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 CS-137 312 6.00E-02 0.00 (0/260) 0.00 (0/52) 0.00 (0/52) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 I-131 312 7.00E-02 0.00 (0/260) 0.00 (0/52) 0.00 (0/52) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 Mean and range based upon detectable measurements only Fraction of detectable measurements at specified locations is indicated in parentheses, (Fraction)

Zero range indicates no detectable activity measurements Report Generated @ 5/6/2013 10:59 AM Appendix B - Page 3

Environmental Radiological Monitoring Program Summary Facility: Oconee Nuclear Station Docket No. 50-269,270,287 Location: Oconee County, South Carolina Report Period: 01-JAN-2012 to 31-DEC-2012 No. of Non-Medium or Type and Total Lower Location with Highest All Indicator Control Routine Pathway Number Limit of Annual Mean Locations Location Report Sampled of Detection Name, Distance, Direction Meas.

Unit of Analyses Mean (Fraction) Location Mean (Fraction) Mean (Fraction)

(LLD)

Measurement Performed Range Code Range Range Drinking Water 064 (pCi/liter) (6.67 mi SSW)

BALA-140 39 15 0.00 (0/26) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 BETA 39 4 1.30 (19/26) 066 1.40 (11/13) 0.92 (11/13) 0 0.83 - 2.03 (18.9 mi SSE) 0.86 - 2.03 0.63 - 1.46 CO-58 39 15 0.00 (0/26) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 CO-60 39 15 0.00 (0/26) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 CS-134 39 15 0.00 (0/26) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 CS-137 39 18 0.00 (0/26) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 FE-59 39 30 0.00 (0/26) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 H-3 12 2000 322 (4/8) 066 322 (4/4) 0.00 (0/4) 0 293 - 360 (18.9 mi SSE) 293 - 360 0.00 - 0.00 I-131 39 15 0.00 (0/26) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 MN-54 39 15 0.00 (0/26) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 NB-95 39 15 0.00 (0/26) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 ZN-65 39 30 0.00 (0/26) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 ZR-95 39 15 0.00 (0/26) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 Mean and range based upon detectable measurements only Fraction of detectable measurements at specified locations is indicated in parentheses, (Fraction)

Zero range indicates no detectable activity measurements Report Generated @ 5/6/2013 10:59 AM Appendix B - Page 4

Environmental Radiological Monitoring Program Summary Facility: Oconee Nuclear Station Docket No. 50-269,270,287 Location: Oconee County, South Carolina Report Period: 01-JAN-2012 to 31-DEC-2012 No. of Non-Medium or Type and Total Lower Location with Highest All Indicator Control Routine Pathway Number Limit of Annual Mean Locations Location Report Sampled of Detection Name, Distance, Direction Meas.

Unit of Analyses Mean (Fraction) Location Mean (Fraction) Mean (Fraction)

(LLD)

Measurement Performed Range Code Range Range Surface Water 062 (pCi/liter) (0.85 mi ENE)

BALA-140 26 15 0.00 (0/13) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 CO-58 26 15 0.00 (0/13) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 CO-60 26 15 0.00 (0/13) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 CS-134 26 15 0.00 (0/13) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 CS-137 26 18 0.00 (0/13) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 FE-59 26 30 0.00 (0/13) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 H-3 8 2000 5755 (4/4) 063.1 5755 (4/4) 0.00 (0/4) 0 3960 - 7640 (0.79 mi E) 3960 - 7640 0.00 - 0.00 I-131 26 15 0.00 (0/13) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 MN-54 26 15 0.00 (0/13) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 NB-95 26 15 0.00 (0/13) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 ZN-65 26 30 0.00 (0/13) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 ZR-95 26 15 0.00 (0/13) 0.00 (0/13) 0.00 (0/13) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 Mean and range based upon detectable measurements only Fraction of detectable measurements at specified locations is indicated in parentheses, (Fraction)

Zero range indicates no detectable activity measurements Report Generated @ 5/6/2013 10:59 AM Appendix B - Page 5

Environmental Radiological Monitoring Program Summary Facility: Oconee Nuclear Station Docket No. 50-269, 270, 287 Location: Oconee County, South Carolina Report Period: 01-JAN-2012 to 31-DEC-2012 No. of Non-Medium or Type and Total Lower Location with Highest All Indicator Control Routine Pathway Number Limit of Annual Mean Locations Location Report Sampled of Detection Name, Distance, Direction Meas.

Unit of Analyses Mean (Fraction) Location Mean (Fraction) Mean (Fraction)

(LLD)

Measurement Performed Range Code Range Range Milk NO INDICATOR 071 (10.2 mi SSE)

(pCi/liter) LOCATION BALA-140 26 15 0.00 (0/0) 0.00 (0/0) 0.00 (0/26) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 CS-134 26 15 0.00 (0/0) 0.00 (0/0) 0.00 (0/26) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 CS-137 26 18 0.00 (0/0) 0.00 (0/0) 0.00 (0/26) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 I-131 26 15 0.00 (0/0) 0.00 (0/0) 0.00 (0/26) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 LLI-131 26 1 0.00 (0/0) 0.00 (0/0) 0.00 (0/26) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 Mean and range based upon detectable measurements only Fraction of detectable measurements at specified locations is indicated in parentheses, (Fraction)

Zero range indicates no detectable activity measurements Report Generated @ 5/6/2013 11:00 AM Appendix B - Page 6

Environmental Radiological Monitoring Program Summary Facility: Oconee Nuclear Station Docket No. 50-269,270,287 Location: Oconee County, South Carolina Report Period: 01-JAN-2012 to 31-DEC-2012 No. of Non-Medium or Type and Total Lower Location with Highest All Indicator Control Routine Pathway Number Limit of Annual Mean Locations Location Report Sampled of Detection Name, Distance, Direction Meas.

Unit of Analyses Mean (Fraction) Location Mean (Fraction) Mean (Fraction)

(LLD)

Measurement Performed Range Code Range Range Broadleaf Vegetation 081 (9.33 mi SE)

(pCi/kg-wet)

CS-134 48 60 0.00 (0/36) 0.00 (0/12) 0.00 (0/12) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 CS-137 48 80 0.00 (0/36) 0.00 (0/12) 0.00 (0/12) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 I-131 48 60 0.00 (0/36) 0.00 (0/12) 0.00 (0/12) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 Mean and range based upon detectable measurements only Fraction of detectable measurements at specified locations is indicated in parentheses, (Fraction)

Zero range indicates no detectable activity measurements Report Generated @ 5/6/2013 11:00 AM Appendix B - Page 7

Environmental Radiological Monitoring Program Summary Facility: Oconee Nuclear Station Docket No. 50-269,270,287 Location: Oconee County, South Carolina Report Period: 01-JAN-2012 to 31-DEC-2012 No. of Non-Medium or Type and Total Lower Location with Highest All Indicator Control Routine Pathway Number Limit of Annual Mean Locations Location Report Sampled of Detection Name, Distance, Direction Meas.

Unit of Analyses Mean (Fraction) Location Mean (Fraction) Mean (Fraction)

(LLD)

Measurement Performed Range Code Range Range Fish 060 (pCi/kg-wet) (2.28 mi NE)

CO-58 12 130 123 (1/8) 063 123 (1/4) 0.00 (0/4) 0 123 - 123 (0.80 mi ESE) 123 - 123 0.00 - 0.00 CO-60 12 130 36.1 (1/8) 063 36.1 (1/4) 0.00 (0/4) 0 36.1 - 36.1 (0.80 mi ESE) 36.1 - 36.1 0.00 - 0.00 CS-134 12 130 0.00 (0/8) 0.00 (0/4) 0.00 (0/4) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 CS-137 12 150 37.6 (7/8) 063 43.2 (4/4) 28.0 (3/4) 0 17.2 - 71.2 (0.80 mi ESE) 20.3 - 71.2 23.8 - 31.8 FE-59 12 260 0.00 (0/8) 0.00 (0/4) 0.00 (0/4) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 MN-54 12 130 0.00 (0/8) 0.00 (0/4) 0.00 (0/4) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 ZN-65 12 260 0.00 (0/8) 0.00 (0/4) 0.00 (0/4) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 Mean and range based upon detectable measurements only Fraction of detectable measurements at specified locations is indicated in parentheses, (Fraction)

Zero range indicates no detectable activity measurements Report Generated @ 5/6/2013 11:01 AM Appendix B - Page 8

Environmental Radiological Monitoring Program Summary Facility: Oconee Nuclear Station Docket No. 50-269,270,287 Location: Oconee County, South Carolina Report Period: 01-JAN-2012 to 31-DEC-2012 No. of Non-Medium or Type and Total Lower Location with Highest All Indicator Control Routine Pathway Number Limit of Annual Mean Locations Location Report Sampled of Detection Name, Distance, Direction Meas.

Unit of Analyses Mean (Fraction) Location Mean (Fraction) Mean (Fraction)

(LLD)

Measurement Performed Range Code Range Range Shoreline 068 Sediment (1.82 mi W)

(pCi/kg-dry)

CS-134 6 150 0.00 (0/4) 0.00 (0/2) 0.00 (0/2) 0 0.00 - 0.00 0.00 - 0.00 0.00 - 0.00 CS-137 6 180 43.7 (4/4) 067 63.5 (2/2) 0.00 (0/2) 0 21.5 - 80.6 (4.34 mi SSE) 46.4 - 80.6 0.00 - 0.00 Mean and range based upon detectable measurements only Fraction of detectable measurements at specified locations is indicated in parentheses, (Fraction)

Zero range indicates no detectable activity measurements Report Generated @ 5/6/2013 11:03 AM Appendix B - Page 9

Environmental Radiological Monitoring Program Summary Facility: Oconee Nuclear Station Docket No. 50-269,270,287 Location: Oconee County, South Carolina Report Period: 01-JAN-2012 to 31-DEC-2012 No. of Non-Type and Total Lower Locations with Highest Medium or All Indicator Control Routine Number Limit of Annual Mean Pathway Sampled Locations Location Report of Detection Name, Distance, Direction Meas.

Analyses Mean (Fraction) Location Mean (Fraction) Mean (Fraction)

Unit of Measurement (LLD)

Performed Range Code Range Range Direct Radiation TLD 058 (9.39 mi WSW)

(mR/standard quarter) 081 (9.33 mi SE) 168 0.00E+00 22.2 (160/160) 036 26.8 (4/4) 27.6 (8/8) 0 13.0 - 31.0 (4.18 mi N) 22.0 - 30.0 21.0 - 36.0 040 26.8 (4/4)

(4.74 mi E) 24.0 - 29.0 042 26.8 (4/4)

(4.93 mi SE) 24.0 - 31.0 Mean and range based upon detectable measurements only Fraction of detectable measurements at specified locations is indicated in parentheses, (Fraction)

Zero range indicates no detectable activity measurements Report Generated @ 5/6/2013 11:03 AM Appendix B - Page 10

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 2.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months , possibly attributable to thunderstorm. No work 077 7/9 - 7/16/2012 7/9 - 7/16/2012 PI request/repair was necessary. G-12-01153 Power to sampling equipment interrupted for about 2.4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months , possibly attributable to thunderstorm. No work 078.1 7/9 - 7/16/2012 7/9 - 7/16/2012 PI request/repair was necessary. G-12-01154 Power to sampling equipment interrupted for about 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months due to tree limb falling on power line, likely attributable to windy conditions from Hurricane Sandy. Work 085 10/22 - 10/29/2012 10/22 - 10/29/2012 PI request 105236 written. G-12-01813 Drinking Water Scheduled Actual Description & Corrective Location Collection Dates Collection Dates Code Action to Prevent Recurrence Action Identity Sampler did not collect sufficient volume, grab sample taken. Tubing was replaced and sampler was recalibrated to 066 4/30 - 5/29/2012 5/29 - 5/29/2012 OT prevent recurrence. G-12-00977 Appendix C - Page 2

Surface Water Scheduled Actual Description & Corrective Location Collection Dates Collection Dates Code Action to Prevent Recurrence Action Identity Reservoir pump found inoperative, work request 98322 written. Maintenance determined the reservoir pump 062 3/5 - 4/2/2012 3/5 - 4/2/2012 PS foot valve clogged. G-12-00809 C.2 UNAVAILABLE ANALYSES There were no unavailable samples for 2012.

Appendix C - Page 3

APPENDIX D ANALYTICAL DEVIATIONS No Analytical deviations were incurred for the 2012 Radiological Environmental Monitoring Program Appendix D - Page 1

APPENDIX E RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM RESULTS 2012 This appendix includes sample analysis report summaries and supportive data generated from each sample medium for 2012.

Appendix E - Page 1

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 Sample Point 074 [ INDICATOR - NNW @ 2.36 miles ]

Sample ID: 227183 Sample Dates: 1/3/2012 - 1/9/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.10E-02 1.67E-03 3.72E-03 I-131 <2.21E-02 0.00E+00 2.21E-02 Cs-134 <1.16E-02 0.00E+00 1.16E-02 Cs-137 <2.79E-02 0.00E+00 2.79E-02 Be-7 <2.55E-01 0.00E+00 2.55E-01 K-40 <4.83E-01 0.00E+00 4.83E-01 Sample ID: 227317 Sample Dates: 1/9/2012 - 1/16/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.03E-02 1.47E-03 3.09E-03 I-131 <6.00E-03 0.00E+00 6.00E-03 Cs-134 <7.09E-03 0.00E+00 7.09E-03 Cs-137 <8.02E-03 0.00E+00 8.02E-03 Be-7 9.41E-02 3.11E-02 6.15E-02 K-40 2.96E-01 5.50E-02 9.21E-02 Sample ID: 227531 Sample Dates: 1/16/2012 - 1/23/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.45E-02 1.34E-03 3.14E-03 I-131 <5.61E-03 0.00E+00 5.61E-03 Cs-134 <8.02E-03 0.00E+00 8.02E-03 Cs-137 <8.22E-03 0.00E+00 8.22E-03 Be-7 5.60E-02 2.83E-02 5.75E-02 K-40 2.90E-01 5.92E-02 1.07E-01 Sample ID: 227853 Sample Dates: 1/23/2012 - 1/30/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.41E-02 1.40E-03 3.52E-03 I-131 <5.54E-03 0.00E+00 5.54E-03 Cs-134 <4.23E-03 0.00E+00 4.23E-03 Cs-137 <5.60E-03 0.00E+00 5.60E-03 Be-7 1.27E-01 2.51E-02 4.32E-02 K-40 <1.73E-01 0.00E+00 1.73E-01 Sample ID: 228120 Sample Dates: 1/30/2012 - 2/6/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.16E-02 1.53E-03 3.38E-03 I-131 <8.30E-03 0.00E+00 8.30E-03 Cs-134 <9.43E-03 0.00E+00 9.43E-03 Cs-137 <1.24E-02 0.00E+00 1.24E-02 Be-7 1.92E-01 3.44E-02 6.64E-02 K-40 <2.45E-01 0.00E+00 2.45E-01 Sample ID: 229431 Sample Dates: 2/6/2012 - 2/13/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.94E-02 1.50E-03 3.38E-03 I-131 <5.73E-03 0.00E+00 5.73E-03 Cs-134 <7.62E-03 0.00E+00 7.62E-03 Cs-137 <8.18E-03 0.00E+00 8.18E-03 Be-7 7.21E-02 3.10E-02 5.32E-02 K-40 2.70E-01 5.01E-02 6.79E-02 Sample ID: 230057 Sample Dates: 2/13/2012 - 2/20/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.77E-02 1.40E-03 3.07E-03 I-131 <5.57E-03 0.00E+00 5.57E-03 Cs-134 <6.04E-03 0.00E+00 6.04E-03 Cs-137 <7.44E-03 0.00E+00 7.44E-03 Be-7 9.97E-02 3.59E-02 6.00E-02 K-40 2.75E-01 5.02E-02 9.50E-02 Sample ID: 230732 Sample Dates: 2/20/2012 - 2/27/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.78E-02 1.39E-03 3.01E-03 I-131 <6.66E-03 0.00E+00 6.66E-03 Cs-134 <8.72E-03 0.00E+00 8.72E-03 Cs-137 <7.11E-03 0.00E+00 7.11E-03 Be-7 1.42E-01 3.01E-02 5.25E-02 K-40 2.65E-01 6.50E-02 1.45E-01 Sample ID: 230941 Sample Dates: 2/27/2012 - 3/5/2012 Nuclide Activity 1 Sigma Error LLD Beta 7.49E-03 1.23E-03 3.50E-03 I-131 <7.58E-03 0.00E+00 7.58E-03 Cs-134 <5.39E-03 0.00E+00 5.39E-03 Cs-137 <4.81E-03 0.00E+00 4.81E-03 Be-7 1.11E-01 3.39E-02 5.69E-02 K-40 1.64E-01 5.54E-02 2.69E-02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 2 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 Sample Point 074 [ INDICATOR - NNW @ 2.36 miles ]

Sample ID: 231651 Sample Dates: 3/5/2012 - 3/12/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.32E-02 1.37E-03 3.43E-03 I-131 <1.66E-02 0.00E+00 1.66E-02 Cs-134 <1.70E-02 0.00E+00 1.70E-02 Cs-137 <2.24E-02 0.00E+00 2.24E-02 Be-7 2.43E-01 6.94E-02 1.47E-01 K-40 <4.28E-01 0.00E+00 4.28E-01 Sample ID: 232465 Sample Dates: 3/12/2012 - 3/19/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.67E-02 1.43E-03 3.36E-03 I-131 <7.24E-03 0.00E+00 7.24E-03 Cs-134 <8.41E-03 0.00E+00 8.41E-03 Cs-137 <9.30E-03 0.00E+00 9.30E-03 Be-7 1.78E-01 3.30E-02 5.18E-02 K-40 1.60E-01 5.17E-02 1.16E-01 Sample ID: 233305 Sample Dates: 3/19/2012 - 3/26/2012 Nuclide Activity 1 Sigma Error LLD Beta 9.50E-03 1.24E-03 3.32E-03 I-131 <6.09E-03 0.00E+00 6.09E-03 Cs-134 <7.49E-03 0.00E+00 7.49E-03 Cs-137 <6.76E-03 0.00E+00 6.76E-03 Be-7 1.34E-01 2.72E-02 4.89E-02 K-40 2.42E-01 6.69E-02 1.09E-01 Sample ID: 233546 Sample Dates: 3/26/2012 - 4/2/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.14E-02 1.46E-03 3.00E-03 I-131 <1.69E-02 0.00E+00 1.69E-02 Cs-134 <2.21E-02 0.00E+00 2.21E-02 Cs-137 <1.33E-02 0.00E+00 1.33E-02 Be-7 2.08E-01 6.00E-02 1.59E-01 K-40 <3.82E-01 0.00E+00 3.82E-01 Sample ID: 234464 Sample Dates: 4/2/2012 - 4/9/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.01E-02 1.55E-03 3.53E-03 I-131 <9.05E-03 0.00E+00 9.05E-03 Cs-134 <6.39E-03 0.00E+00 6.39E-03 Cs-137 <7.72E-03 0.00E+00 7.72E-03 Be-7 2.35E-01 3.50E-02 6.33E-02 K-40 1.20E-01 5.74E-02 9.98E-02 Sample ID: 234892 Sample Dates: 4/9/2012 - 4/16/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.53E-02 1.46E-03 3.63E-03 I-131 <1.35E-02 0.00E+00 1.35E-02 Cs-134 <1.88E-02 0.00E+00 1.88E-02 Cs-137 <2.14E-02 0.00E+00 2.14E-02 Be-7 1.17E-01 5.56E-02 1.70E-01 K-40 <4.45E-01 0.00E+00 4.45E-01 Sample ID: 235214 Sample Dates: 4/16/2012 - 4/23/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.63E-02 1.36E-03 3.07E-03 I-131 <1.79E-02 0.00E+00 1.79E-02 Cs-134 <1.66E-02 0.00E+00 1.66E-02 Cs-137 <1.53E-02 0.00E+00 1.53E-02 Be-7 1.46E-01 5.29E-02 9.52E-02 K-40 <3.91E-01 0.00E+00 3.91E-01 Sample ID: 235399 Sample Dates: 4/23/2012 - 4/30/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.27E-02 1.55E-03 3.32E-03 I-131 <1.74E-02 0.00E+00 1.74E-02 Cs-134 <1.63E-02 0.00E+00 1.63E-02 Cs-137 <2.34E-02 0.00E+00 2.34E-02 Be-7 2.33E-01 4.87E-02 1.32E-01 K-40 <5.21E-01 0.00E+00 5.21E-01 Sample ID: 235737 Sample Dates: 4/30/2012 - 5/7/2012 Nuclide Activity 1 Sigma Error LLD Beta 9.00E-03 1.23E-03 3.30E-03 I-131 <6.60E-03 0.00E+00 6.60E-03 Cs-134 <8.78E-03 0.00E+00 8.78E-03 Cs-137 <7.96E-03 0.00E+00 7.96E-03 Be-7 9.17E-02 2.45E-02 5.33E-02 K-40 2.47E-01 6.41E-02 1.16E-01 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 3 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 Sample Point 074 [ INDICATOR - NNW @ 2.36 miles ]

Sample ID: 235983 Sample Dates: 5/7/2012 - 5/14/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.55E-02 1.36E-03 3.13E-03 I-131 <1.66E-02 0.00E+00 1.66E-02 Cs-134 <1.56E-02 0.00E+00 1.56E-02 Cs-137 <2.05E-02 0.00E+00 2.05E-02 Be-7 <2.26E-01 0.00E+00 2.26E-01 K-40 <4.20E-01 0.00E+00 4.20E-01 Sample ID: 236193 Sample Dates: 5/14/2012 - 5/21/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.78E-02 1.50E-03 3.60E-03 I-131 <2.20E-02 0.00E+00 2.20E-02 Cs-134 <1.93E-02 0.00E+00 1.93E-02 Cs-137 <2.32E-02 0.00E+00 2.32E-02 Be-7 1.71E-01 5.22E-02 1.23E-01 K-40 <2.77E-01 0.00E+00 2.77E-01 Sample ID: 236506 Sample Dates: 5/21/2012 - 5/29/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.33E-02 1.13E-03 2.54E-03 I-131 <1.48E-02 0.00E+00 1.48E-02 Cs-134 <1.56E-02 0.00E+00 1.56E-02 Cs-137 <1.44E-02 0.00E+00 1.44E-02 Be-7 8.02E-02 2.67E-02 1.24E-01 K-40 <4.06E-01 0.00E+00 4.06E-01 Sample ID: 236805 Sample Dates: 5/29/2012 - 6/4/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.15E-02 1.49E-03 3.95E-03 I-131 <5.11E-03 0.00E+00 5.11E-03 Cs-134 <5.54E-03 0.00E+00 5.54E-03 Cs-137 <5.18E-03 0.00E+00 5.18E-03 Be-7 1.04E-01 2.48E-02 3.63E-02 K-40 3.60E-01 4.84E-02 3.98E-02 Sample ID: 237131 Sample Dates: 6/4/2012 - 6/11/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.86E-02 1.45E-03 3.24E-03 I-131 <1.20E-02 0.00E+00 1.20E-02 Cs-134 <1.48E-02 0.00E+00 1.48E-02 Cs-137 <2.18E-02 0.00E+00 2.18E-02 Be-7 1.52E-01 7.30E-02 1.84E-01 K-40 <4.92E-01 0.00E+00 4.92E-01 Sample ID: 237306 Sample Dates: 6/11/2012 - 6/18/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.97E-02 1.45E-03 3.08E-03 I-131 <1.65E-02 0.00E+00 1.65E-02 Cs-134 <1.43E-02 0.00E+00 1.43E-02 Cs-137 <1.53E-02 0.00E+00 1.53E-02 Be-7 1.16E-01 4.30E-02 1.71E-01 K-40 <3.92E-01 0.00E+00 3.92E-01 Sample ID: 237982 Sample Dates: 6/18/2012 - 6/25/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.05E-02 1.43E-03 2.97E-03 I-131 <1.66E-02 0.00E+00 1.66E-02 Cs-134 <2.09E-02 0.00E+00 2.09E-02 Cs-137 <1.88E-02 0.00E+00 1.88E-02 Be-7 1.51E-01 3.91E-02 1.19E-01 K-40 <3.81E-01 0.00E+00 3.81E-01 Sample ID: 238734 Sample Dates: 6/25/2012 - 7/2/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.21E-02 1.60E-03 3.52E-03 I-131 <1.72E-02 0.00E+00 1.72E-02 Cs-134 <1.75E-02 0.00E+00 1.75E-02 Cs-137 <1.98E-02 0.00E+00 1.98E-02 Be-7 2.85E-01 6.63E-02 1.13E-01 K-40 <4.12E-01 0.00E+00 4.12E-01 Sample ID: 239111 Sample Dates: 7/2/2012 - 7/9/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.84E-02 1.44E-03 3.21E-03 I-131 <6.58E-03 0.00E+00 6.58E-03 Cs-134 <7.29E-03 0.00E+00 7.29E-03 Cs-137 <8.72E-03 0.00E+00 8.72E-03 Be-7 9.47E-02 3.51E-02 5.81E-02 K-40 3.22E-01 5.44E-02 2.48E-02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 4 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 Sample Point 074 [ INDICATOR - NNW @ 2.36 miles ]

Sample ID: 239883 Sample Dates: 7/9/2012 - 7/16/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.05E-02 1.20E-03 3.01E-03 I-131 <1.99E-02 0.00E+00 1.99E-02 Cs-134 <1.84E-02 0.00E+00 1.84E-02 Cs-137 <2.14E-02 0.00E+00 2.14E-02 Be-7 1.01E-01 5.46E-02 1.63E-01 K-40 <4.18E-01 0.00E+00 4.18E-01 Sample ID: 240007 Sample Dates: 7/16/2012 - 7/23/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.07E-02 1.27E-03 3.32E-03 I-131 <6.07E-03 0.00E+00 6.07E-03 Cs-134 <6.78E-03 0.00E+00 6.78E-03 Cs-137 <9.60E-03 0.00E+00 9.60E-03 Be-7 8.80E-02 2.65E-02 4.29E-02 K-40 2.83E-01 6.23E-02 6.55E-02 Sample ID: 240329 Sample Dates: 7/23/2012 - 7/30/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.44E-02 1.35E-03 3.19E-03 I-131 <1.70E-02 0.00E+00 1.70E-02 Cs-134 <2.35E-02 0.00E+00 2.35E-02 Cs-137 <2.19E-02 0.00E+00 2.19E-02 Be-7 <1.97E-01 0.00E+00 1.97E-01 K-40 <3.64E-01 0.00E+00 3.64E-01 Sample ID: 240964 Sample Dates: 7/30/2012 - 8/6/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.08E-02 1.46E-03 3.04E-03 I-131 <1.49E-02 0.00E+00 1.49E-02 Cs-134 <1.86E-02 0.00E+00 1.86E-02 Cs-137 <2.64E-02 0.00E+00 2.64E-02 Be-7 <1.94E-01 0.00E+00 1.94E-01 K-40 <3.55E-01 0.00E+00 3.55E-01 Sample ID: 241235 Sample Dates: 8/6/2012 - 8/13/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.55E-02 1.37E-03 3.22E-03 I-131 <2.10E-02 0.00E+00 2.10E-02 Cs-134 <2.35E-02 0.00E+00 2.35E-02 Cs-137 <1.50E-02 0.00E+00 1.50E-02 Be-7 <2.29E-01 0.00E+00 2.29E-01 K-40 <4.03E-01 0.00E+00 4.03E-01 Sample ID: 241542 Sample Dates: 8/13/2012 - 8/20/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.39E-02 1.53E-03 3.10E-03 I-131 <5.24E-03 0.00E+00 5.24E-03 Cs-134 <7.38E-03 0.00E+00 7.38E-03 Cs-137 <8.25E-03 0.00E+00 8.25E-03 Be-7 1.51E-01 3.22E-02 5.47E-02 K-40 2.78E-01 5.85E-02 6.84E-02 Sample ID: 242131 Sample Dates: 8/20/2012 - 8/27/2012 Nuclide Activity 1 Sigma Error LLD Beta 3.19E-02 1.76E-03 3.37E-03 I-131 <1.52E-02 0.00E+00 1.52E-02 Cs-134 <2.43E-02 0.00E+00 2.43E-02 Cs-137 <2.01E-02 0.00E+00 2.01E-02 Be-7 2.04E-01 6.10E-02 1.76E-01 K-40 <3.94E-01 0.00E+00 3.94E-01 Sample ID: 242460 Sample Dates: 8/27/2012 - 9/4/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.19E-02 1.21E-03 3.04E-03 I-131 <7.18E-03 0.00E+00 7.18E-03 Cs-134 <3.95E-03 0.00E+00 3.95E-03 Cs-137 <6.73E-03 0.00E+00 6.73E-03 Be-7 5.04E-02 1.99E-02 5.04E-02 K-40 1.43E-01 4.30E-02 7.80E-02 Sample ID: 242987 Sample Dates: 9/4/2012 - 9/10/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.37E-02 1.53E-03 3.95E-03 I-131 <6.91E-03 0.00E+00 6.91E-03 Cs-134 <7.47E-03 0.00E+00 7.47E-03 Cs-137 <1.17E-02 0.00E+00 1.17E-02 Be-7 2.02E-01 4.26E-02 7.61E-02 K-40 <5.52E-02 0.00E+00 5.52E-02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 5 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

Media Type: AIR PARTICULATE Concentration (Activity): pCi/m3 Sample Point 074 [ INDICATOR - NNW @ 2.36 miles ]

Sample ID: 243745 Sample Dates: 9/10/2012 - 9/17/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.39E-02 1.59E-03 3.39E-03 I-131 <1.29E-02 0.00E+00 1.29E-02 Cs-134 <1.68E-02 0.00E+00 1.68E-02 Cs-137 <1.72E-02 0.00E+00 1.72E-02 Be-7 2.42E-01 4.95E-02 1.76E-01 K-40 4.37E-01 1.13E-01 7.87E-02 Sample Point 077 [ INDICATOR - SW @ 1 miles ]

Sample ID: 227184 Sample Dates: 1/3/2012 - 1/9/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.81E-02 1.59E-03 3.71E-03 I-131 <1.03E-02 0.00E+00 1.03E-02 Cs-134 <8.59E-03 0.00E+00 8.59E-03 Cs-137 <1.18E-02 0.00E+00 1.18E-02 Be-7 1.74E-01 3.81E-02 8.42E-02 K-40 <2.91E-01 0.00E+00 2.91E-01 Sample ID: 227318 Sample Dates: 1/9/2012 - 1/16/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.78E-02 1.41E-03 3.09E-03 I-131 <4.85E-03 0.00E+00 4.85E-03 Cs-134 <3.72E-03 0.00E+00 3.72E-03 Cs-137 <7.83E-03 0.00E+00 7.83E-03 Be-7 1.64E-01 2.34E-02 4.78E-02 K-40 <1.82E-01 0.00E+00 1.82E-01 Sample ID: 227532 Sample Dates: 1/16/2012 - 1/23/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.36E-02 1.54E-03 3.14E-03 I-131 <7.44E-03 0.00E+00 7.44E-03 Cs-134 <7.89E-03 0.00E+00 7.89E-03 Cs-137 <7.90E-03 0.00E+00 7.90E-03 Be-7 1.14E-01 2.73E-02 5.83E-02 K-40 <2.32E-01 0.00E+00 2.32E-01 Sample ID: 227854 Sample Dates: 1/23/2012 - 1/30/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.24E-02 1.36E-03 3.52E-03 I-131 <7.23E-03 0.00E+00 7.23E-03 Cs-134 <5.75E-03 0.00E+00 5.75E-03 Cs-137 <9.16E-03 0.00E+00 9.16E-03 Be-7 1.59E-01 2.75E-02 5.16E-02 K-40 1.04E-01 3.31E-02 9.05E-02 Sample ID: 228121 Sample Dates: 1/30/2012 - 2/6/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.82E-02 1.46E-03 3.39E-03 I-131 <7.88E-03 0.00E+00 7.88E-03 Cs-134 <7.60E-03 0.00E+00 7.60E-03 Cs-137 <1.05E-02 0.00E+00 1.05E-02 Be-7 1.04E-01 3.26E-02 6.02E-02 K-40 <1.52E-01 0.00E+00 1.52E-01 Sample ID: 229432 Sample Dates: 2/6/2012 - 2/13/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.20E-02 1.54E-03 3.33E-03 I-131 <7.68E-03 0.00E+00 7.68E-03 Cs-134 <7.16E-03 0.00E+00 7.16E-03 Cs-137 <8.11E-03 0.00E+00 8.11E-03 Be-7 1.06E-01 2.50E-02 6.10E-02 K-40 1.08E-01 4.30E-02 1.06E-01 Sample ID: 230058 Sample Dates: 2/13/2012 - 2/20/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.82E-02 1.41E-03 3.06E-03 I-131 <6.80E-03 0.00E+00 6.80E-03 Cs-134 <5.96E-03 0.00E+00 5.96E-03 Cs-137 <6.69E-03 0.00E+00 6.69E-03 Be-7 1.28E-01 3.39E-02 5.22E-02 K-40 3.02E-01 5.51E-02 1.47E-01 Sample ID: 230733 Sample Dates: 2/20/2012 - 2/27/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.64E-02 1.35E-03 3.01E-03 I-131 <8.85E-03 0.00E+00 8.85E-03 Cs-134 <8.05E-03 0.00E+00 8.05E-03 Cs-137 <9.13E-03 0.00E+00 9.13E-03 Be-7 1.30E-01 2.60E-02 7.50E-02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 6 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 230733 Sample Dates: 2/20/2012 - 2/27/2012 Nuclide Activity 1 Sigma Error LLD K-40 <1.18E-01 0.00E+00 1.18E-01 Sample ID: 230942 Sample Dates: 2/27/2012 - 3/5/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.48E-02 1.41E-03 3.50E-03 I-131 <6.75E-03 0.00E+00 6.75E-03 Cs-134 <6.39E-03 0.00E+00 6.39E-03 Cs-137 <1.02E-02 0.00E+00 1.02E-02 Be-7 1.71E-01 3.33E-02 5.30E-02 K-40 <1.33E-01 0.00E+00 1.33E-01 Sample ID: 231652 Sample Dates: 3/5/2012 - 3/12/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.47E-02 1.41E-03 3.43E-03 I-131 <8.50E-03 0.00E+00 8.50E-03 Cs-134 <8.82E-03 0.00E+00 8.82E-03 Cs-137 <9.14E-03 0.00E+00 9.14E-03 Be-7 2.06E-01 3.33E-02 5.74E-02 K-40 <1.37E-01 0.00E+00 1.37E-01 Sample ID: 232466 Sample Dates: 3/12/2012 - 3/19/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.48E-02 1.38E-03 3.35E-03 I-131 <5.34E-03 0.00E+00 5.34E-03 Cs-134 <2.88E-03 0.00E+00 2.88E-03 Cs-137 <7.66E-03 0.00E+00 7.66E-03 Be-7 1.61E-01 2.55E-02 4.98E-02 K-40 2.55E-01 4.82E-02 6.86E-02 Sample ID: 233306 Sample Dates: 3/19/2012 - 3/26/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.80E-02 1.45E-03 3.33E-03 I-131 <5.83E-03 0.00E+00 5.83E-03 Cs-134 <9.69E-03 0.00E+00 9.69E-03 Cs-137 <7.70E-03 0.00E+00 7.70E-03 Be-7 1.52E-01 3.26E-02 4.54E-02 K-40 <2.53E-01 0.00E+00 2.53E-01 Sample ID: 233547 Sample Dates: 3/26/2012 - 4/2/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.08E-02 1.45E-03 3.00E-03 I-131 <1.80E-02 0.00E+00 1.80E-02 Cs-134 <1.26E-02 0.00E+00 1.26E-02 Cs-137 <1.18E-02 0.00E+00 1.18E-02 Be-7 2.13E-01 5.57E-02 1.59E-01 K-40 <3.14E-01 0.00E+00 3.14E-01 Sample ID: 234465 Sample Dates: 4/2/2012 - 4/9/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.67E-02 1.48E-03 3.53E-03 I-131 <6.33E-03 0.00E+00 6.33E-03 Cs-134 <4.51E-03 0.00E+00 4.51E-03 Cs-137 <8.04E-03 0.00E+00 8.04E-03 Be-7 1.59E-01 2.68E-02 4.95E-02 K-40 <2.20E-01 0.00E+00 2.20E-01 Sample ID: 234893 Sample Dates: 4/9/2012 - 4/16/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.79E-02 1.51E-03 3.61E-03 I-131 <2.15E-02 0.00E+00 2.15E-02 Cs-134 <2.00E-02 0.00E+00 2.00E-02 Cs-137 <1.51E-02 0.00E+00 1.51E-02 Be-7 1.59E-01 6.37E-02 1.23E-01 K-40 <4.17E-01 0.00E+00 4.17E-01 Sample ID: 235215 Sample Dates: 4/16/2012 - 4/23/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.77E-02 1.40E-03 3.06E-03 I-131 <1.45E-02 0.00E+00 1.45E-02 Cs-134 <1.49E-02 0.00E+00 1.49E-02 Cs-137 <1.24E-02 0.00E+00 1.24E-02 Be-7 1.39E-01 5.74E-02 1.32E-01 K-40 <3.91E-01 0.00E+00 3.91E-01 Sample ID: 235400 Sample Dates: 4/23/2012 - 4/30/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.30E-02 1.56E-03 3.34E-03 I-131 <5.25E-03 0.00E+00 5.25E-03 Cs-134 <6.01E-03 0.00E+00 6.01E-03 Cs-137 <7.50E-03 0.00E+00 7.50E-03 Be-7 2.10E-01 3.64E-02 5.75E-02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 7 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 235400 Sample Dates: 4/23/2012 - 4/30/2012 Nuclide Activity 1 Sigma Error LLD K-40 2.98E-01 5.20E-02 2.44E-02 Sample ID: 235738 Sample Dates: 4/30/2012 - 5/7/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.75E-02 1.44E-03 3.28E-03 I-131 <5.24E-03 0.00E+00 5.24E-03 Cs-134 <8.30E-03 0.00E+00 8.30E-03 Cs-137 <5.57E-03 0.00E+00 5.57E-03 Be-7 1.93E-01 2.90E-02 6.34E-02 K-40 2.65E-01 5.20E-02 7.32E-02 Sample ID: 235984 Sample Dates: 5/7/2012 - 5/14/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.56E-02 1.36E-03 3.14E-03 I-131 <8.15E-03 0.00E+00 8.15E-03 Cs-134 <8.17E-03 0.00E+00 8.17E-03 Cs-137 <7.55E-03 0.00E+00 7.55E-03 Be-7 1.60E-01 2.72E-02 4.95E-02 K-40 1.96E-01 5.50E-02 9.13E-02 Sample ID: 236194 Sample Dates: 5/14/2012 - 5/21/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.83E-02 1.51E-03 3.59E-03 I-131 <8.33E-03 0.00E+00 8.33E-03 Cs-134 <9.90E-03 0.00E+00 9.90E-03 Cs-137 <7.90E-03 0.00E+00 7.90E-03 Be-7 1.64E-01 3.78E-02 7.75E-02 K-40 <2.62E-01 0.00E+00 2.62E-01 Sample ID: 236507 Sample Dates: 5/21/2012 - 5/29/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.08E-02 1.31E-03 2.55E-03 I-131 <4.75E-03 0.00E+00 4.75E-03 Cs-134 <5.88E-03 0.00E+00 5.88E-03 Cs-137 <1.13E-02 0.00E+00 1.13E-02 Be-7 1.73E-01 3.71E-02 5.39E-02 K-40 <2.09E-01 0.00E+00 2.09E-01 Sample ID: 236806 Sample Dates: 5/29/2012 - 6/4/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.59E-02 1.60E-03 3.97E-03 I-131 <1.28E-02 0.00E+00 1.28E-02 Cs-134 <6.49E-03 0.00E+00 6.49E-03 Cs-137 <1.14E-02 0.00E+00 1.14E-02 Be-7 <1.86E-01 0.00E+00 1.86E-01 K-40 <2.91E-01 0.00E+00 2.91E-01 Sample ID: 237132 Sample Dates: 6/4/2012 - 6/11/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.62E-02 1.39E-03 3.24E-03 I-131 <7.70E-03 0.00E+00 7.70E-03 Cs-134 <8.42E-03 0.00E+00 8.42E-03 Cs-137 <9.37E-03 0.00E+00 9.37E-03 Be-7 9.88E-02 3.29E-02 7.25E-02 K-40 <1.84E-01 0.00E+00 1.84E-01 Sample ID: 237307 Sample Dates: 6/11/2012 - 6/18/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.70E-02 1.38E-03 3.07E-03 I-131 <7.70E-03 0.00E+00 7.70E-03 Cs-134 <9.65E-03 0.00E+00 9.65E-03 Cs-137 <1.22E-02 0.00E+00 1.22E-02 Be-7 1.87E-01 3.47E-02 6.38E-02 K-40 <2.57E-01 0.00E+00 2.57E-01 Sample ID: 237983 Sample Dates: 6/18/2012 - 6/25/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.52E-02 1.54E-03 2.97E-03 I-131 <6.58E-03 0.00E+00 6.58E-03 Cs-134 <7.73E-03 0.00E+00 7.73E-03 Cs-137 <1.50E-02 0.00E+00 1.50E-02 Be-7 2.55E-01 4.51E-02 7.60E-02 K-40 <2.21E-01 0.00E+00 2.21E-01 Sample ID: 238735 Sample Dates: 6/25/2012 - 7/2/2012 Nuclide Activity 1 Sigma Error LLD Beta 3.06E-02 1.78E-03 3.52E-03 I-131 <1.36E-02 0.00E+00 1.36E-02 Cs-134 <1.32E-02 0.00E+00 1.32E-02 Cs-137 <1.47E-02 0.00E+00 1.47E-02 Be-7 <2.48E-01 0.00E+00 2.48E-01 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 8 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 238735 Sample Dates: 6/25/2012 - 7/2/2012 Nuclide Activity 1 Sigma Error LLD K-40 <4.00E-01 0.00E+00 4.00E-01 Sample ID: 239112 Sample Dates: 7/2/2012 - 7/9/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.82E-02 1.66E-03 3.22E-03 I-131 <7.60E-03 0.00E+00 7.60E-03 Cs-134 <7.44E-03 0.00E+00 7.44E-03 Cs-137 <9.47E-03 0.00E+00 9.47E-03 Be-7 2.25E-01 3.32E-02 5.18E-02 K-40 2.53E-01 5.06E-02 7.69E-02 Sample ID: 239884 Sample Dates: 7/9/2012 - 7/16/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.12E-02 1.23E-03 3.06E-03 I-131 <1.37E-02 0.00E+00 1.37E-02 Cs-134 <2.19E-02 0.00E+00 2.19E-02 Cs-137 <1.97E-02 0.00E+00 1.97E-02 Be-7 1.10E-01 5.27E-02 1.51E-01 K-40 <4.25E-01 0.00E+00 4.25E-01 Sample ID: 240008 Sample Dates: 7/16/2012 - 7/23/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.31E-02 1.33E-03 3.32E-03 I-131 <8.31E-03 0.00E+00 8.31E-03 Cs-134 <7.50E-03 0.00E+00 7.50E-03 Cs-137 <7.34E-03 0.00E+00 7.34E-03 Be-7 6.44E-02 3.02E-02 5.36E-02 K-40 <2.33E-01 0.00E+00 2.33E-01 Sample ID: 240330 Sample Dates: 7/23/2012 - 7/30/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.12E-02 1.51E-03 3.20E-03 I-131 <2.22E-02 0.00E+00 2.22E-02 Cs-134 <2.13E-02 0.00E+00 2.13E-02 Cs-137 <1.85E-02 0.00E+00 1.85E-02 Be-7 8.97E-02 4.49E-02 1.83E-01 K-40 <4.93E-01 0.00E+00 4.93E-01 Sample ID: 240965 Sample Dates: 7/30/2012 - 8/6/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.47E-02 1.55E-03 3.05E-03 I-131 <1.69E-02 0.00E+00 1.69E-02 Cs-134 <1.02E-02 0.00E+00 1.02E-02 Cs-137 <1.85E-02 0.00E+00 1.85E-02 Be-7 1.87E-01 5.07E-02 1.71E-01 K-40 <4.19E-01 0.00E+00 4.19E-01 Sample ID: 241236 Sample Dates: 8/6/2012 - 8/13/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.48E-02 1.35E-03 3.21E-03 I-131 <7.24E-03 0.00E+00 7.24E-03 Cs-134 <7.10E-03 0.00E+00 7.10E-03 Cs-137 <8.58E-03 0.00E+00 8.58E-03 Be-7 1.48E-01 3.39E-02 5.65E-02 K-40 <2.01E-01 0.00E+00 2.01E-01 Sample ID: 241543 Sample Dates: 8/13/2012 - 8/20/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.56E-02 1.56E-03 3.10E-03 I-131 <8.87E-03 0.00E+00 8.87E-03 Cs-134 <8.09E-03 0.00E+00 8.09E-03 Cs-137 <1.19E-02 0.00E+00 1.19E-02 Be-7 1.75E-01 3.45E-02 6.17E-02 K-40 <2.68E-01 0.00E+00 2.68E-01 Sample ID: 242132 Sample Dates: 8/20/2012 - 8/27/2012 Nuclide Activity 1 Sigma Error LLD Beta 3.49E-02 1.82E-03 3.38E-03 I-131 <6.78E-03 0.00E+00 6.78E-03 Cs-134 <6.32E-03 0.00E+00 6.32E-03 Cs-137 <1.06E-02 0.00E+00 1.06E-02 Be-7 1.39E-01 3.62E-02 5.74E-02 K-40 <2.40E-01 0.00E+00 2.40E-01 Sample ID: 242461 Sample Dates: 8/27/2012 - 9/4/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.12E-02 1.19E-03 3.03E-03 I-131 <1.54E-02 0.00E+00 1.54E-02 Cs-134 <1.53E-02 0.00E+00 1.53E-02 Cs-137 <1.86E-02 0.00E+00 1.86E-02 Be-7 1.28E-01 3.41E-02 9.83E-02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 9 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 242461 Sample Dates: 8/27/2012 - 9/4/2012 Nuclide Activity 1 Sigma Error LLD K-40 <3.89E-01 0.00E+00 3.89E-01 Sample ID: 242988 Sample Dates: 9/4/2012 - 9/10/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.79E-02 1.64E-03 3.96E-03 I-131 <7.78E-03 0.00E+00 7.78E-03 Cs-134 <8.68E-03 0.00E+00 8.68E-03 Cs-137 <9.42E-03 0.00E+00 9.42E-03 Be-7 1.64E-01 3.41E-02 5.85E-02 K-40 <2.73E-01 0.00E+00 2.73E-01 Sample ID: 243746 Sample Dates: 9/10/2012 - 9/17/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.59E-02 1.63E-03 3.39E-03 I-131 <4.67E-03 0.00E+00 4.67E-03 Cs-134 <6.41E-03 0.00E+00 6.41E-03 Cs-137 <2.20E-03 0.00E+00 2.20E-03 Be-7 2.12E-01 3.52E-02 4.87E-02 K-40 <1.91E-01 0.00E+00 1.91E-01 Sample ID: 244151 Sample Dates: 9/17/2012 - 9/24/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.51E-02 1.57E-03 3.10E-03 I-131 <2.23E-02 0.00E+00 2.23E-02 Cs-134 <1.54E-02 0.00E+00 1.54E-02 Cs-137 <3.32E-02 0.00E+00 3.32E-02 Be-7 1.15E-01 4.27E-02 9.55E-02 K-40 <4.48E-01 0.00E+00 4.48E-01 Sample ID: 245022 Sample Dates: 9/24/2012 - 10/1/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.89E-02 1.69E-03 3.34E-03 I-131 <2.02E-02 0.00E+00 2.02E-02 Cs-134 <1.63E-02 0.00E+00 1.63E-02 Cs-137 <1.40E-02 0.00E+00 1.40E-02 Be-7 1.97E-01 5.28E-02 1.78E-01 K-40 <3.84E-01 0.00E+00 3.84E-01 Sample ID: 245842 Sample Dates: 10/1/2012 - 10/8/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.54E-02 1.61E-03 3.26E-03 I-131 <2.10E-02 0.00E+00 2.10E-02 Cs-134 <2.11E-02 0.00E+00 2.11E-02 Cs-137 <2.09E-02 0.00E+00 2.09E-02 Be-7 1.57E-01 5.06E-02 8.87E-02 K-40 <5.36E-01 0.00E+00 5.36E-01 Sample ID: 246697 Sample Dates: 10/8/2012 - 10/15/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.83E-02 1.65E-03 3.20E-03 I-131 <1.87E-02 0.00E+00 1.87E-02 Cs-134 <2.35E-02 0.00E+00 2.35E-02 Cs-137 <2.11E-02 0.00E+00 2.11E-02 Be-7 1.40E-01 6.82E-02 1.47E-01 K-40 <3.53E-01 0.00E+00 3.53E-01 Sample ID: 247105 Sample Dates: 10/15/2012 - 10/22/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.66E-02 1.68E-03 3.56E-03 I-131 <1.60E-02 0.00E+00 1.60E-02 Cs-134 <1.72E-02 0.00E+00 1.72E-02 Cs-137 <1.59E-02 0.00E+00 1.59E-02 Be-7 1.72E-01 5.27E-02 1.70E-01 K-40 <4.18E-01 0.00E+00 4.18E-01 Sample ID: 247421 Sample Dates: 10/22/2012 - 10/29/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.95E-02 1.73E-03 3.53E-03 I-131 <1.63E-02 0.00E+00 1.63E-02 Cs-134 <1.79E-02 0.00E+00 1.79E-02 Cs-137 <1.56E-02 0.00E+00 1.56E-02 Be-7 2.10E-01 6.07E-02 2.77E-02 K-40 <4.68E-01 0.00E+00 4.68E-01 Sample ID: 247759 Sample Dates: 10/29/2012 - 11/5/2012 Nuclide Activity 1 Sigma Error LLD Beta 3.12E-02 1.73E-03 3.31E-03 I-131 <1.45E-02 0.00E+00 1.45E-02 Cs-134 <2.54E-02 0.00E+00 2.54E-02 Cs-137 <2.18E-02 0.00E+00 2.18E-02 Be-7 1.49E-01 6.92E-02 1.51E-01 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 10 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 247759 Sample Dates: 10/29/2012 - 11/5/2012 Nuclide Activity 1 Sigma Error LLD K-40 <4.16E-01 0.00E+00 4.16E-01 Sample ID: 247954 Sample Dates: 11/5/2012 - 11/12/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.91E-02 1.67E-03 3.26E-03 I-131 <1.53E-02 0.00E+00 1.53E-02 Cs-134 <2.03E-02 0.00E+00 2.03E-02 Cs-137 <1.61E-02 0.00E+00 1.61E-02 Be-7 1.82E-01 4.30E-02 1.29E-01 K-40 <3.14E-01 0.00E+00 3.14E-01 Sample ID: 248358 Sample Dates: 11/12/2012 - 11/19/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.55E-02 1.77E-03 4.13E-03 I-131 <2.05E-02 0.00E+00 2.05E-02 Cs-134 <1.80E-02 0.00E+00 1.80E-02 Cs-137 <1.75E-02 0.00E+00 1.75E-02 Be-7 <2.56E-01 0.00E+00 2.56E-01 K-40 2.27E-01 1.15E-01 2.14E-01 Sample ID: 248637 Sample Dates: 11/19/2012 - 11/26/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.75E-02 1.68E-03 3.43E-03 I-131 <1.20E-02 0.00E+00 1.20E-02 Cs-134 <2.15E-02 0.00E+00 2.15E-02 Cs-137 <2.61E-02 0.00E+00 2.61E-02 Be-7 <1.98E-01 0.00E+00 1.98E-01 K-40 <3.56E-01 0.00E+00 3.56E-01 Sample ID: 249010 Sample Dates: 11/26/2012 - 12/3/2012 Nuclide Activity 1 Sigma Error LLD Beta 3.33E-02 1.75E-03 3.22E-03 I-131 <1.69E-02 0.00E+00 1.69E-02 Cs-134 <1.63E-02 0.00E+00 1.63E-02 Cs-137 <1.33E-02 0.00E+00 1.33E-02 Be-7 1.40E-01 7.22E-02 1.93E-01 K-40 <4.88E-01 0.00E+00 4.88E-01 Sample ID: 249249 Sample Dates: 12/3/2012 - 12/10/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.91E-02 1.52E-03 3.56E-03 I-131 <1.64E-02 0.00E+00 1.64E-02 Cs-134 <1.64E-02 0.00E+00 1.64E-02 Cs-137 <2.10E-02 0.00E+00 2.10E-02 Be-7 1.27E-01 4.06E-02 1.57E-01 K-40 <4.60E-01 0.00E+00 4.60E-01 Sample ID: 249447 Sample Dates: 12/10/2012 - 12/17/2012 Nuclide Activity 1 Sigma Error LLD Beta 3.12E-02 1.76E-03 3.47E-03 I-131 <1.72E-02 0.00E+00 1.72E-02 Cs-134 <2.34E-02 0.00E+00 2.34E-02 Cs-137 <2.16E-02 0.00E+00 2.16E-02 Be-7 <2.07E-01 0.00E+00 2.07E-01 K-40 <4.50E-01 0.00E+00 4.50E-01 Sample ID: 249874 Sample Dates: 12/17/2012 - 12/24/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.30E-02 1.54E-03 3.19E-03 I-131 <2.05E-02 0.00E+00 2.05E-02 Cs-134 <1.59E-02 0.00E+00 1.59E-02 Cs-137 <1.89E-02 0.00E+00 1.89E-02 Be-7 2.33E-01 7.54E-02 1.56E-01 K-40 <4.15E-01 0.00E+00 4.15E-01 Sample ID: 250181 Sample Dates: 12/24/2012 - 12/31/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.80E-02 1.48E-03 3.47E-03 I-131 <2.10E-02 0.00E+00 2.10E-02 Cs-134 <1.84E-02 0.00E+00 1.84E-02 Cs-137 <1.82E-02 0.00E+00 1.82E-02 Be-7 <1.88E-01 0.00E+00 1.88E-01 K-40 <4.00E-01 0.00E+00 4.00E-01 Sample Point 078.1 [ INDICATOR - WSW @ 0.53 miles ]

Sample ID: 227185 Sample Dates: 1/3/2012 - 1/9/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.85E-02 1.60E-03 3.72E-03 I-131 <2.20E-02 0.00E+00 2.20E-02 Cs-134 <1.87E-02 0.00E+00 1.87E-02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 11 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 227185 Sample Dates: 1/3/2012 - 1/9/2012 Nuclide Activity 1 Sigma Error LLD Cs-137 <2.81E-02 0.00E+00 2.81E-02 Be-7 1.43E-01 6.94E-02 1.86E-01 K-40 <5.92E-01 0.00E+00 5.92E-01 Sample ID: 227319 Sample Dates: 1/9/2012 - 1/16/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.07E-02 1.48E-03 3.09E-03 I-131 <7.33E-03 0.00E+00 7.33E-03 Cs-134 <5.79E-03 0.00E+00 5.79E-03 Cs-137 <1.08E-02 0.00E+00 1.08E-02 Be-7 1.44E-01 2.82E-02 5.61E-02 K-40 <2.42E-01 0.00E+00 2.42E-01 Sample ID: 227533 Sample Dates: 1/16/2012 - 1/23/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.90E-02 1.44E-03 3.14E-03 I-131 <8.87E-03 0.00E+00 8.87E-03 Cs-134 <1.05E-02 0.00E+00 1.05E-02 Cs-137 <7.83E-03 0.00E+00 7.83E-03 Be-7 1.36E-01 2.72E-02 1.47E-02 K-40 <2.22E-01 0.00E+00 2.22E-01 Sample ID: 227855 Sample Dates: 1/23/2012 - 1/30/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.62E-02 1.45E-03 3.52E-03 I-131 <8.09E-03 0.00E+00 8.09E-03 Cs-134 <1.18E-02 0.00E+00 1.18E-02 Cs-137 <8.93E-03 0.00E+00 8.93E-03 Be-7 1.25E-01 2.61E-02 6.57E-02 K-40 2.24E-01 6.21E-02 1.24E-01 Sample ID: 228122 Sample Dates: 1/30/2012 - 2/6/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.92E-02 1.48E-03 3.39E-03 I-131 <5.48E-03 0.00E+00 5.48E-03 Cs-134 <8.24E-03 0.00E+00 8.24E-03 Cs-137 <7.98E-03 0.00E+00 7.98E-03 Be-7 2.08E-01 3.49E-02 4.70E-02 K-40 <1.44E-01 0.00E+00 1.44E-01 Sample ID: 229433 Sample Dates: 2/6/2012 - 2/13/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.91E-02 1.50E-03 3.39E-03 I-131 <5.69E-03 0.00E+00 5.69E-03 Cs-134 <6.70E-03 0.00E+00 6.70E-03 Cs-137 <8.86E-03 0.00E+00 8.86E-03 Be-7 1.66E-01 2.60E-02 4.56E-02 K-40 <1.71E-01 0.00E+00 1.71E-01 Sample ID: 230059 Sample Dates: 2/13/2012 - 2/20/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.57E-02 1.34E-03 3.06E-03 I-131 <7.93E-03 0.00E+00 7.93E-03 Cs-134 <9.11E-03 0.00E+00 9.11E-03 Cs-137 <6.24E-03 0.00E+00 6.24E-03 Be-7 9.32E-02 3.36E-02 6.99E-02 K-40 <2.09E-01 0.00E+00 2.09E-01 Sample ID: 230734 Sample Dates: 2/20/2012 - 2/27/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.60E-02 1.35E-03 3.02E-03 I-131 <5.04E-03 0.00E+00 5.04E-03 Cs-134 <5.26E-03 0.00E+00 5.26E-03 Cs-137 <7.97E-03 0.00E+00 7.97E-03 Be-7 1.28E-01 2.50E-02 4.34E-02 K-40 <1.43E-01 0.00E+00 1.43E-01 Sample ID: 230943 Sample Dates: 2/27/2012 - 3/5/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.50E-02 1.42E-03 3.50E-03 I-131 <5.50E-03 0.00E+00 5.50E-03 Cs-134 <6.10E-03 0.00E+00 6.10E-03 Cs-137 <9.60E-03 0.00E+00 9.60E-03 Be-7 1.51E-01 2.76E-02 5.63E-02 K-40 1.69E-01 4.09E-02 7.04E-02 Sample ID: 231653 Sample Dates: 3/5/2012 - 3/12/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.71E-02 1.46E-03 3.43E-03 I-131 <7.61E-03 0.00E+00 7.61E-03 Cs-134 <8.50E-03 0.00E+00 8.50E-03 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 12 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 231653 Sample Dates: 3/5/2012 - 3/12/2012 Nuclide Activity 1 Sigma Error LLD Cs-137 <6.17E-03 0.00E+00 6.17E-03 Be-7 2.15E-01 5.40E-02 8.50E-02 K-40 1.26E-01 4.80E-02 1.42E-01 Sample ID: 232467 Sample Dates: 3/12/2012 - 3/19/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.46E-02 1.38E-03 3.35E-03 I-131 <1.60E-02 0.00E+00 1.60E-02 Cs-134 <2.28E-02 0.00E+00 2.28E-02 Cs-137 <1.96E-02 0.00E+00 1.96E-02 Be-7 2.17E-01 6.41E-02 1.47E-01 K-40 <4.69E-01 0.00E+00 4.69E-01 Sample ID: 233307 Sample Dates: 3/19/2012 - 3/26/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.53E-02 1.39E-03 3.33E-03 I-131 <4.52E-03 0.00E+00 4.52E-03 Cs-134 <5.76E-03 0.00E+00 5.76E-03 Cs-137 <7.82E-03 0.00E+00 7.82E-03 Be-7 1.68E-01 2.60E-02 3.63E-02 K-40 <1.37E-01 0.00E+00 1.37E-01 Sample ID: 233548 Sample Dates: 3/26/2012 - 4/2/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.93E-02 1.42E-03 3.00E-03 I-131 <6.58E-03 0.00E+00 6.58E-03 Cs-134 <7.77E-03 0.00E+00 7.77E-03 Cs-137 <7.69E-03 0.00E+00 7.69E-03 Be-7 2.00E-01 2.82E-02 5.73E-02 K-40 <2.19E-01 0.00E+00 2.19E-01 Sample ID: 234466 Sample Dates: 4/2/2012 - 4/9/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.57E-02 1.45E-03 3.53E-03 I-131 <6.80E-03 0.00E+00 6.80E-03 Cs-134 <9.45E-03 0.00E+00 9.45E-03 Cs-137 <1.02E-02 0.00E+00 1.02E-02 Be-7 2.05E-01 3.67E-02 6.15E-02 K-40 <2.14E-01 0.00E+00 2.14E-01 Sample ID: 234894 Sample Dates: 4/9/2012 - 4/16/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.96E-02 1.55E-03 3.63E-03 I-131 <5.68E-03 0.00E+00 5.68E-03 Cs-134 <6.26E-03 0.00E+00 6.26E-03 Cs-137 <8.89E-03 0.00E+00 8.89E-03 Be-7 2.33E-01 3.51E-02 6.89E-02 K-40 <1.57E-01 0.00E+00 1.57E-01 Sample ID: 235216 Sample Dates: 4/16/2012 - 4/23/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.71E-02 1.38E-03 3.06E-03 I-131 <1.33E-02 0.00E+00 1.33E-02 Cs-134 <1.47E-02 0.00E+00 1.47E-02 Cs-137 <1.98E-02 0.00E+00 1.98E-02 Be-7 1.26E-01 4.41E-02 1.34E-01 K-40 <4.97E-01 0.00E+00 4.97E-01 Sample ID: 235401 Sample Dates: 4/23/2012 - 4/30/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.20E-02 1.53E-03 3.32E-03 I-131 <5.89E-03 0.00E+00 5.89E-03 Cs-134 <7.02E-03 0.00E+00 7.02E-03 Cs-137 <8.02E-03 0.00E+00 8.02E-03 Be-7 2.15E-01 2.99E-02 4.01E-02 K-40 2.88E-01 5.09E-02 2.43E-02 Sample ID: 235739 Sample Dates: 4/30/2012 - 5/7/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.79E-02 1.49E-03 3.38E-03 I-131 <7.41E-03 0.00E+00 7.41E-03 Cs-134 <7.06E-03 0.00E+00 7.06E-03 Cs-137 <6.68E-03 0.00E+00 6.68E-03 Be-7 1.91E-01 3.19E-02 4.80E-02 K-40 <2.32E-01 0.00E+00 2.32E-01 Sample ID: 235985 Sample Dates: 5/7/2012 - 5/14/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.69E-02 1.39E-03 3.13E-03 I-131 <1.90E-02 0.00E+00 1.90E-02 Cs-134 <2.13E-02 0.00E+00 2.13E-02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 13 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 235985 Sample Dates: 5/7/2012 - 5/14/2012 Nuclide Activity 1 Sigma Error LLD Cs-137 <2.04E-02 0.00E+00 2.04E-02 Be-7 1.26E-01 7.29E-02 1.64E-01 K-40 <5.40E-01 0.00E+00 5.40E-01 Sample ID: 236195 Sample Dates: 5/14/2012 - 5/21/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.49E-02 1.44E-03 3.60E-03 I-131 <6.80E-03 0.00E+00 6.80E-03 Cs-134 <8.67E-03 0.00E+00 8.67E-03 Cs-137 <1.12E-02 0.00E+00 1.12E-02 Be-7 1.58E-01 2.97E-02 4.78E-02 K-40 <1.74E-01 0.00E+00 1.74E-01 Sample ID: 236508 Sample Dates: 5/21/2012 - 5/29/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.13E-02 1.32E-03 2.55E-03 I-131 <4.58E-03 0.00E+00 4.58E-03 Cs-134 <6.69E-03 0.00E+00 6.69E-03 Cs-137 <9.47E-03 0.00E+00 9.47E-03 Be-7 1.69E-01 3.16E-02 5.06E-02 K-40 <1.18E-01 0.00E+00 1.18E-01 Sample ID: 236807 Sample Dates: 5/29/2012 - 6/4/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.61E-02 1.61E-03 3.96E-03 I-131 <2.14E-02 0.00E+00 2.14E-02 Cs-134 <2.49E-02 0.00E+00 2.49E-02 Cs-137 <2.36E-02 0.00E+00 2.36E-02 Be-7 3.10E-01 7.37E-02 1.86E-01 K-40 <5.31E-01 0.00E+00 5.31E-01 Sample ID: 237133 Sample Dates: 6/4/2012 - 6/11/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.60E-02 1.38E-03 3.24E-03 I-131 <6.47E-03 0.00E+00 6.47E-03 Cs-134 <8.77E-03 0.00E+00 8.77E-03 Cs-137 <8.91E-03 0.00E+00 8.91E-03 Be-7 1.52E-01 3.38E-02 5.32E-02 K-40 <1.34E-01 0.00E+00 1.34E-01 Sample ID: 237308 Sample Dates: 6/11/2012 - 6/18/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.65E-02 1.37E-03 3.07E-03 I-131 <5.68E-03 0.00E+00 5.68E-03 Cs-134 <7.25E-03 0.00E+00 7.25E-03 Cs-137 <1.15E-02 0.00E+00 1.15E-02 Be-7 1.10E-01 3.44E-02 5.84E-02 K-40 <1.71E-01 0.00E+00 1.71E-01 Sample ID: 237984 Sample Dates: 6/18/2012 - 6/25/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.53E-02 1.54E-03 2.97E-03 I-131 <5.89E-03 0.00E+00 5.89E-03 Cs-134 <6.05E-03 0.00E+00 6.05E-03 Cs-137 <8.03E-03 0.00E+00 8.03E-03 Be-7 1.74E-01 3.46E-02 4.72E-02 K-40 2.64E-01 5.79E-02 9.42E-02 Sample ID: 238736 Sample Dates: 6/25/2012 - 7/2/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.77E-02 1.71E-03 3.52E-03 I-131 <9.58E-03 0.00E+00 9.58E-03 Cs-134 <1.07E-02 0.00E+00 1.07E-02 Cs-137 <9.66E-03 0.00E+00 9.66E-03 Be-7 2.40E-01 4.56E-02 8.05E-02 K-40 <2.48E-01 0.00E+00 2.48E-01 Sample ID: 239113 Sample Dates: 7/2/2012 - 7/9/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.94E-02 1.68E-03 3.22E-03 I-131 <6.62E-03 0.00E+00 6.62E-03 Cs-134 <8.41E-03 0.00E+00 8.41E-03 Cs-137 <1.20E-02 0.00E+00 1.20E-02 Be-7 1.84E-01 4.13E-02 6.59E-02 K-40 <1.54E-01 0.00E+00 1.54E-01 Sample ID: 239885 Sample Dates: 7/9/2012 - 7/16/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.31E-02 1.28E-03 3.06E-03 I-131 <6.98E-03 0.00E+00 6.98E-03 Cs-134 <7.95E-03 0.00E+00 7.95E-03 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 14 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 239885 Sample Dates: 7/9/2012 - 7/16/2012 Nuclide Activity 1 Sigma Error LLD Cs-137 <1.06E-02 0.00E+00 1.06E-02 Be-7 1.03E-01 4.25E-02 8.47E-02 K-40 <3.20E-01 0.00E+00 3.20E-01 Sample ID: 240009 Sample Dates: 7/16/2012 - 7/23/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.32E-02 1.33E-03 3.32E-03 I-131 <8.16E-03 0.00E+00 8.16E-03 Cs-134 <4.37E-03 0.00E+00 4.37E-03 Cs-137 <1.32E-02 0.00E+00 1.32E-02 Be-7 1.36E-01 3.06E-02 5.86E-02 K-40 <2.14E-01 0.00E+00 2.14E-01 Sample ID: 240331 Sample Dates: 7/23/2012 - 7/30/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.94E-02 1.47E-03 3.20E-03 I-131 <7.81E-03 0.00E+00 7.81E-03 Cs-134 <6.53E-03 0.00E+00 6.53E-03 Cs-137 <1.16E-02 0.00E+00 1.16E-02 Be-7 1.34E-01 3.03E-02 5.81E-02 K-40 1.84E-01 6.10E-02 1.19E-01 Sample ID: 240966 Sample Dates: 7/30/2012 - 8/6/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.47E-02 1.55E-03 3.05E-03 I-131 <1.47E-02 0.00E+00 1.47E-02 Cs-134 <2.07E-02 0.00E+00 2.07E-02 Cs-137 <1.92E-02 0.00E+00 1.92E-02 Be-7 2.07E-01 4.62E-02 7.55E-02 K-40 <3.89E-01 0.00E+00 3.89E-01 Sample ID: 241237 Sample Dates: 8/6/2012 - 8/13/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.36E-02 1.32E-03 3.22E-03 I-131 <6.74E-03 0.00E+00 6.74E-03 Cs-134 <9.33E-03 0.00E+00 9.33E-03 Cs-137 <1.04E-02 0.00E+00 1.04E-02 Be-7 <9.79E-02 0.00E+00 9.79E-02 K-40 <2.14E-01 0.00E+00 2.14E-01 Sample ID: 241544 Sample Dates: 8/13/2012 - 8/20/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.96E-02 1.65E-03 3.10E-03 I-131 <5.44E-03 0.00E+00 5.44E-03 Cs-134 <6.54E-03 0.00E+00 6.54E-03 Cs-137 <6.87E-03 0.00E+00 6.87E-03 Be-7 1.94E-01 2.86E-02 4.79E-02 K-40 <1.84E-01 0.00E+00 1.84E-01 Sample ID: 242133 Sample Dates: 8/20/2012 - 8/27/2012 Nuclide Activity 1 Sigma Error LLD Beta 3.19E-02 1.76E-03 3.37E-03 I-131 <7.26E-03 0.00E+00 7.26E-03 Cs-134 <9.32E-03 0.00E+00 9.32E-03 Cs-137 <1.08E-02 0.00E+00 1.08E-02 Be-7 2.27E-01 3.96E-02 5.33E-02 K-40 1.25E-01 5.10E-02 1.05E-01 Sample ID: 242462 Sample Dates: 8/27/2012 - 9/4/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.05E-02 1.18E-03 3.03E-03 I-131 <6.87E-03 0.00E+00 6.87E-03 Cs-134 <5.04E-03 0.00E+00 5.04E-03 Cs-137 <8.02E-03 0.00E+00 8.02E-03 Be-7 1.08E-01 2.40E-02 4.83E-02 K-40 1.17E-01 3.38E-02 2.63E-02 Sample ID: 242989 Sample Dates: 9/4/2012 - 9/10/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.66E-02 1.61E-03 3.96E-03 I-131 <1.99E-02 0.00E+00 1.99E-02 Cs-134 <1.77E-02 0.00E+00 1.77E-02 Cs-137 <2.67E-02 0.00E+00 2.67E-02 Be-7 1.44E-01 4.15E-02 1.27E-01 K-40 <5.18E-01 0.00E+00 5.18E-01 Sample ID: 243747 Sample Dates: 9/10/2012 - 9/17/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.54E-02 1.62E-03 3.39E-03 I-131 <8.40E-03 0.00E+00 8.40E-03 Cs-134 <3.71E-03 0.00E+00 3.71E-03 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 15 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 243747 Sample Dates: 9/10/2012 - 9/17/2012 Nuclide Activity 1 Sigma Error LLD Cs-137 <6.62E-03 0.00E+00 6.62E-03 Be-7 1.85E-01 3.00E-02 6.00E-02 K-40 <1.75E-01 0.00E+00 1.75E-01 Sample ID: 244152 Sample Dates: 9/17/2012 - 9/24/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.19E-02 1.50E-03 3.09E-03 I-131 <4.99E-03 0.00E+00 4.99E-03 Cs-134 <6.96E-03 0.00E+00 6.96E-03 Cs-137 <5.15E-03 0.00E+00 5.15E-03 Be-7 1.61E-01 4.36E-02 6.45E-02 K-40 <2.13E-01 0.00E+00 2.13E-01 Sample ID: 245023 Sample Dates: 9/24/2012 - 10/1/2012 Nuclide Activity 1 Sigma Error LLD Beta 3.11E-02 1.72E-03 3.32E-03 I-131 <1.76E-02 0.00E+00 1.76E-02 Cs-134 <9.93E-03 0.00E+00 9.93E-03 Cs-137 <1.67E-02 0.00E+00 1.67E-02 Be-7 1.91E-01 6.50E-02 1.08E-01 K-40 <4.11E-01 0.00E+00 4.11E-01 Sample ID: 245843 Sample Dates: 10/1/2012 - 10/8/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.80E-02 1.67E-03 3.29E-03 I-131 <4.96E-03 0.00E+00 4.96E-03 Cs-134 <7.64E-03 0.00E+00 7.64E-03 Cs-137 <2.26E-03 0.00E+00 2.26E-03 Be-7 1.47E-01 3.02E-02 6.55E-02 K-40 <1.64E-01 0.00E+00 1.64E-01 Sample ID: 246698 Sample Dates: 10/8/2012 - 10/15/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.93E-02 1.67E-03 3.19E-03 I-131 <1.84E-02 0.00E+00 1.84E-02 Cs-134 <1.91E-02 0.00E+00 1.91E-02 Cs-137 <1.95E-02 0.00E+00 1.95E-02 Be-7 1.22E-01 6.53E-02 1.47E-01 K-40 <4.13E-01 0.00E+00 4.13E-01 Sample ID: 247106 Sample Dates: 10/15/2012 - 10/22/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.37E-02 1.63E-03 3.56E-03 I-131 <1.83E-02 0.00E+00 1.83E-02 Cs-134 <1.95E-02 0.00E+00 1.95E-02 Cs-137 <1.34E-02 0.00E+00 1.34E-02 Be-7 1.65E-01 4.12E-02 1.13E-01 K-40 <4.45E-01 0.00E+00 4.45E-01 Sample ID: 247422 Sample Dates: 10/22/2012 - 10/29/2012 Nuclide Activity 1 Sigma Error LLD Beta 3.18E-02 1.77E-03 3.53E-03 I-131 <1.64E-02 0.00E+00 1.64E-02 Cs-134 <1.48E-02 0.00E+00 1.48E-02 Cs-137 <1.79E-02 0.00E+00 1.79E-02 Be-7 <2.17E-01 0.00E+00 2.17E-01 K-40 <3.87E-01 0.00E+00 3.87E-01 Sample ID: 247760 Sample Dates: 10/29/2012 - 11/5/2012 Nuclide Activity 1 Sigma Error LLD Beta 3.39E-02 1.78E-03 3.31E-03 I-131 <1.88E-02 0.00E+00 1.88E-02 Cs-134 <2.22E-02 0.00E+00 2.22E-02 Cs-137 <2.40E-02 0.00E+00 2.40E-02 Be-7 2.00E-01 5.32E-02 8.68E-02 K-40 <4.16E-01 0.00E+00 4.16E-01 Sample ID: 247955 Sample Dates: 11/5/2012 - 11/12/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.92E-02 1.68E-03 3.27E-03 I-131 <1.55E-02 0.00E+00 1.55E-02 Cs-134 <1.68E-02 0.00E+00 1.68E-02 Cs-137 <2.68E-02 0.00E+00 2.68E-02 Be-7 1.41E-01 4.54E-02 1.45E-01 K-40 <5.70E-01 0.00E+00 5.70E-01 Sample ID: 248359 Sample Dates: 11/12/2012 - 11/19/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.57E-02 1.77E-03 4.13E-03 I-131 <1.78E-02 0.00E+00 1.78E-02 Cs-134 <1.29E-02 0.00E+00 1.29E-02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 16 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 248359 Sample Dates: 11/12/2012 - 11/19/2012 Nuclide Activity 1 Sigma Error LLD Cs-137 <1.96E-02 0.00E+00 1.96E-02 Be-7 1.75E-01 4.25E-02 8.76E-02 K-40 <3.19E-01 0.00E+00 3.19E-01 Sample ID: 248638 Sample Dates: 11/19/2012 - 11/26/2012 Nuclide Activity 1 Sigma Error LLD Beta 3.17E-02 1.76E-03 3.44E-03 I-131 <1.33E-02 0.00E+00 1.33E-02 Cs-134 <1.84E-02 0.00E+00 1.84E-02 Cs-137 <1.96E-02 0.00E+00 1.96E-02 Be-7 1.04E-01 6.52E-02 1.12E-01 K-40 <3.56E-01 0.00E+00 3.56E-01 Sample ID: 249011 Sample Dates: 11/26/2012 - 12/3/2012 Nuclide Activity 1 Sigma Error LLD Beta 3.90E-02 1.85E-03 3.22E-03 I-131 <1.74E-02 0.00E+00 1.74E-02 Cs-134 <1.80E-02 0.00E+00 1.80E-02 Cs-137 <1.77E-02 0.00E+00 1.77E-02 Be-7 1.21E-01 6.24E-02 1.58E-01 K-40 <4.39E-01 0.00E+00 4.39E-01 Sample ID: 249250 Sample Dates: 12/3/2012 - 12/10/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.94E-02 1.52E-03 3.56E-03 I-131 <1.34E-02 0.00E+00 1.34E-02 Cs-134 <1.91E-02 0.00E+00 1.91E-02 Cs-137 <1.48E-02 0.00E+00 1.48E-02 Be-7 8.25E-02 5.53E-02 1.06E-01 K-40 <5.05E-01 0.00E+00 5.05E-01 Sample ID: 249448 Sample Dates: 12/10/2012 - 12/17/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.78E-02 1.69E-03 3.47E-03 I-131 <1.76E-02 0.00E+00 1.76E-02 Cs-134 <1.58E-02 0.00E+00 1.58E-02 Cs-137 <1.99E-02 0.00E+00 1.99E-02 Be-7 <1.99E-01 0.00E+00 1.99E-01 K-40 2.28E-01 1.08E-01 8.10E-02 Sample ID: 249875 Sample Dates: 12/17/2012 - 12/24/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.61E-02 1.60E-03 3.19E-03 I-131 <1.54E-02 0.00E+00 1.54E-02 Cs-134 <2.09E-02 0.00E+00 2.09E-02 Cs-137 <2.00E-02 0.00E+00 2.00E-02 Be-7 1.36E-01 3.78E-02 1.50E-01 K-40 <4.15E-01 0.00E+00 4.15E-01 Sample ID: 250182 Sample Dates: 12/24/2012 - 12/31/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.74E-02 1.47E-03 3.47E-03 I-131 <1.74E-02 0.00E+00 1.74E-02 Cs-134 <2.21E-02 0.00E+00 2.21E-02 Cs-137 <1.30E-02 0.00E+00 1.30E-02 Be-7 <1.63E-01 0.00E+00 1.63E-01 K-40 <4.82E-01 0.00E+00 4.82E-01 Sample Point 079 [ INDICATOR - NE @ 0.56 miles ]

Sample ID: 227186 Sample Dates: 1/3/2012 - 1/9/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.03E-02 1.65E-03 3.70E-03 I-131 <8.62E-03 0.00E+00 8.62E-03 Cs-134 <1.18E-02 0.00E+00 1.18E-02 Cs-137 <1.27E-02 0.00E+00 1.27E-02 Be-7 1.30E-01 4.47E-02 7.32E-02 K-40 <2.82E-01 0.00E+00 2.82E-01 Sample ID: 227320 Sample Dates: 1/9/2012 - 1/16/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.83E-02 1.43E-03 3.11E-03 I-131 <1.86E-02 0.00E+00 1.86E-02 Cs-134 <1.72E-02 0.00E+00 1.72E-02 Cs-137 <1.52E-02 0.00E+00 1.52E-02 Be-7 2.37E-01 5.71E-02 1.33E-01 K-40 <5.19E-01 0.00E+00 5.19E-01 Sample ID: 227534 Sample Dates: 1/16/2012 - 1/23/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.99E-02 1.46E-03 3.13E-03 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 17 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 227534 Sample Dates: 1/16/2012 - 1/23/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.31E-02 0.00E+00 1.31E-02 Cs-134 <1.63E-02 0.00E+00 1.63E-02 Cs-137 <2.27E-02 0.00E+00 2.27E-02 Be-7 1.13E-01 5.79E-02 2.76E-02 K-40 <5.12E-01 0.00E+00 5.12E-01 Sample ID: 227856 Sample Dates: 1/23/2012 - 1/30/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.26E-02 1.37E-03 3.53E-03 I-131 <1.51E-02 0.00E+00 1.51E-02 Cs-134 <1.63E-02 0.00E+00 1.63E-02 Cs-137 <2.15E-02 0.00E+00 2.15E-02 Be-7 1.63E-01 7.69E-02 1.32E-01 K-40 <4.43E-01 0.00E+00 4.43E-01 Sample ID: 228123 Sample Dates: 1/30/2012 - 2/6/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.00E-02 1.49E-03 3.37E-03 I-131 <4.04E-03 0.00E+00 4.04E-03 Cs-134 <5.84E-03 0.00E+00 5.84E-03 Cs-137 <6.94E-03 0.00E+00 6.94E-03 Be-7 1.21E-01 2.26E-02 3.81E-02 K-40 <1.38E-01 0.00E+00 1.38E-01 Sample ID: 229434 Sample Dates: 2/6/2012 - 2/13/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.10E-02 1.54E-03 3.37E-03 I-131 <6.83E-03 0.00E+00 6.83E-03 Cs-134 <6.68E-03 0.00E+00 6.68E-03 Cs-137 <9.92E-03 0.00E+00 9.92E-03 Be-7 1.27E-01 2.50E-02 5.57E-02 K-40 1.25E-01 5.04E-02 9.16E-02 Sample ID: 230060 Sample Dates: 2/13/2012 - 2/20/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.70E-02 1.39E-03 3.10E-03 I-131 <4.84E-03 0.00E+00 4.84E-03 Cs-134 <5.34E-03 0.00E+00 5.34E-03 Cs-137 <6.13E-03 0.00E+00 6.13E-03 Be-7 1.33E-01 2.94E-02 5.02E-02 K-40 <1.33E-01 0.00E+00 1.33E-01 Sample ID: 230735 Sample Dates: 2/20/2012 - 2/27/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.48E-02 1.32E-03 3.02E-03 I-131 <7.19E-03 0.00E+00 7.19E-03 Cs-134 <7.54E-03 0.00E+00 7.54E-03 Cs-137 <9.92E-03 0.00E+00 9.92E-03 Be-7 1.36E-01 2.49E-02 6.50E-02 K-40 <2.22E-01 0.00E+00 2.22E-01 Sample ID: 230944 Sample Dates: 2/27/2012 - 3/5/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.37E-02 1.38E-03 3.49E-03 I-131 <6.07E-03 0.00E+00 6.07E-03 Cs-134 <5.01E-03 0.00E+00 5.01E-03 Cs-137 <8.66E-03 0.00E+00 8.66E-03 Be-7 1.51E-01 3.76E-02 5.40E-02 K-40 <1.63E-01 0.00E+00 1.63E-01 Sample ID: 231654 Sample Dates: 3/5/2012 - 3/12/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.52E-02 1.43E-03 3.47E-03 I-131 <6.79E-03 0.00E+00 6.79E-03 Cs-134 <8.06E-03 0.00E+00 8.06E-03 Cs-137 <6.14E-03 0.00E+00 6.14E-03 Be-7 1.93E-01 3.32E-02 4.33E-02 K-40 1.45E-01 3.87E-02 7.97E-02 Sample ID: 232468 Sample Dates: 3/12/2012 - 3/19/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.45E-02 1.38E-03 3.35E-03 I-131 <9.61E-03 0.00E+00 9.61E-03 Cs-134 <7.65E-03 0.00E+00 7.65E-03 Cs-137 <1.17E-02 0.00E+00 1.17E-02 Be-7 1.20E-01 3.61E-02 7.77E-02 K-40 <2.24E-01 0.00E+00 2.24E-01 Sample ID: 233308 Sample Dates: 3/19/2012 - 3/26/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.51E-02 1.38E-03 3.33E-03 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 18 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 233308 Sample Dates: 3/19/2012 - 3/26/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.84E-03 0.00E+00 7.84E-03 Cs-134 <8.62E-03 0.00E+00 8.62E-03 Cs-137 <7.69E-03 0.00E+00 7.69E-03 Be-7 <1.16E-01 0.00E+00 1.16E-01 K-40 <2.33E-01 0.00E+00 2.33E-01 Sample ID: 233549 Sample Dates: 3/26/2012 - 4/2/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.20E-02 1.48E-03 3.00E-03 I-131 <5.09E-03 0.00E+00 5.09E-03 Cs-134 <6.52E-03 0.00E+00 6.52E-03 Cs-137 <7.84E-03 0.00E+00 7.84E-03 Be-7 1.83E-01 3.27E-02 4.61E-02 K-40 <1.39E-01 0.00E+00 1.39E-01 Sample ID: 234467 Sample Dates: 4/2/2012 - 4/9/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.46E-02 1.42E-03 3.53E-03 I-131 <1.58E-02 0.00E+00 1.58E-02 Cs-134 <1.48E-02 0.00E+00 1.48E-02 Cs-137 <1.71E-02 0.00E+00 1.71E-02 Be-7 2.13E-01 4.76E-02 1.16E-01 K-40 <4.31E-01 0.00E+00 4.31E-01 Sample ID: 234895 Sample Dates: 4/9/2012 - 4/16/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.71E-02 1.50E-03 3.63E-03 I-131 <9.23E-03 0.00E+00 9.23E-03 Cs-134 <8.36E-03 0.00E+00 8.36E-03 Cs-137 <1.09E-02 0.00E+00 1.09E-02 Be-7 2.10E-01 3.59E-02 7.08E-02 K-40 <4.30E-02 0.00E+00 4.30E-02 Sample ID: 235217 Sample Dates: 4/16/2012 - 4/23/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.38E-02 1.30E-03 3.07E-03 I-131 <1.84E-02 0.00E+00 1.84E-02 Cs-134 <1.29E-02 0.00E+00 1.29E-02 Cs-137 <2.32E-02 0.00E+00 2.32E-02 Be-7 1.01E-01 4.16E-02 1.49E-01 K-40 <4.21E-01 0.00E+00 4.21E-01 Sample ID: 235402 Sample Dates: 4/23/2012 - 4/30/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.18E-02 1.53E-03 3.31E-03 I-131 <8.09E-03 0.00E+00 8.09E-03 Cs-134 <1.00E-02 0.00E+00 1.00E-02 Cs-137 <1.16E-02 0.00E+00 1.16E-02 Be-7 1.64E-01 4.06E-02 7.00E-02 K-40 <1.90E-01 0.00E+00 1.90E-01 Sample ID: 235740 Sample Dates: 4/30/2012 - 5/7/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.53E-02 1.40E-03 3.31E-03 I-131 <7.68E-03 0.00E+00 7.68E-03 Cs-134 <8.02E-03 0.00E+00 8.02E-03 Cs-137 <9.65E-03 0.00E+00 9.65E-03 Be-7 1.42E-01 3.49E-02 7.35E-02 K-40 1.61E-01 4.15E-02 9.78E-02 Sample ID: 235986 Sample Dates: 5/7/2012 - 5/14/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.60E-02 1.37E-03 3.13E-03 I-131 <8.63E-03 0.00E+00 8.63E-03 Cs-134 <1.16E-02 0.00E+00 1.16E-02 Cs-137 <1.06E-02 0.00E+00 1.06E-02 Be-7 1.77E-01 3.80E-02 6.38E-02 K-40 <1.86E-01 0.00E+00 1.86E-01 Sample ID: 236196 Sample Dates: 5/14/2012 - 5/21/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.65E-02 1.47E-03 3.60E-03 I-131 <5.96E-03 0.00E+00 5.96E-03 Cs-134 <7.86E-03 0.00E+00 7.86E-03 Cs-137 <7.93E-03 0.00E+00 7.93E-03 Be-7 1.38E-01 3.41E-02 6.38E-02 K-40 <1.90E-01 0.00E+00 1.90E-01 Sample ID: 236509 Sample Dates: 5/21/2012 - 5/29/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.26E-02 1.35E-03 2.55E-03 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 19 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 236509 Sample Dates: 5/21/2012 - 5/29/2012 Nuclide Activity 1 Sigma Error LLD I-131 <5.76E-03 0.00E+00 5.76E-03 Cs-134 <7.19E-03 0.00E+00 7.19E-03 Cs-137 <6.00E-03 0.00E+00 6.00E-03 Be-7 1.51E-01 2.82E-02 4.99E-02 K-40 <1.80E-01 0.00E+00 1.80E-01 Sample ID: 236808 Sample Dates: 5/29/2012 - 6/4/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.70E-02 1.63E-03 3.97E-03 I-131 <1.62E-02 0.00E+00 1.62E-02 Cs-134 <2.66E-02 0.00E+00 2.66E-02 Cs-137 <2.12E-02 0.00E+00 2.12E-02 Be-7 1.31E-01 4.88E-02 2.34E-01 K-40 <6.22E-01 0.00E+00 6.22E-01 Sample ID: 237134 Sample Dates: 6/4/2012 - 6/11/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.72E-02 1.41E-03 3.24E-03 I-131 <5.98E-03 0.00E+00 5.98E-03 Cs-134 <7.65E-03 0.00E+00 7.65E-03 Cs-137 <7.83E-03 0.00E+00 7.83E-03 Be-7 1.45E-01 2.50E-02 4.35E-02 K-40 <1.96E-01 0.00E+00 1.96E-01 Sample ID: 237309 Sample Dates: 6/11/2012 - 6/18/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.69E-02 1.38E-03 3.08E-03 I-131 <9.01E-03 0.00E+00 9.01E-03 Cs-134 <7.31E-03 0.00E+00 7.31E-03 Cs-137 <8.17E-03 0.00E+00 8.17E-03 Be-7 1.77E-01 3.36E-02 5.62E-02 K-40 2.32E-01 4.95E-02 9.19E-02 Sample ID: 237985 Sample Dates: 6/18/2012 - 6/25/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.76E-02 1.58E-03 2.97E-03 I-131 <8.18E-03 0.00E+00 8.18E-03 Cs-134 <8.60E-03 0.00E+00 8.60E-03 Cs-137 <6.29E-03 0.00E+00 6.29E-03 Be-7 1.96E-01 3.82E-02 8.39E-02 K-40 <2.37E-01 0.00E+00 2.37E-01 Sample ID: 238737 Sample Dates: 6/25/2012 - 7/2/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.75E-02 1.72E-03 3.54E-03 I-131 <5.94E-03 0.00E+00 5.94E-03 Cs-134 <6.87E-03 0.00E+00 6.87E-03 Cs-137 <1.01E-02 0.00E+00 1.01E-02 Be-7 2.60E-01 3.81E-02 5.41E-02 K-40 <2.54E-01 0.00E+00 2.54E-01 Sample ID: 239114 Sample Dates: 7/2/2012 - 7/9/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.63E-02 1.61E-03 3.22E-03 I-131 <5.22E-03 0.00E+00 5.22E-03 Cs-134 <5.22E-03 0.00E+00 5.22E-03 Cs-137 <9.08E-03 0.00E+00 9.08E-03 Be-7 2.27E-01 2.73E-02 4.76E-02 K-40 <1.55E-01 0.00E+00 1.55E-01 Sample ID: 239886 Sample Dates: 7/9/2012 - 7/16/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.53E-02 1.33E-03 3.02E-03 I-131 <1.76E-02 0.00E+00 1.76E-02 Cs-134 <2.01E-02 0.00E+00 2.01E-02 Cs-137 <2.09E-02 0.00E+00 2.09E-02 Be-7 1.57E-01 4.74E-02 1.33E-01 K-40 <4.13E-01 0.00E+00 4.13E-01 Sample ID: 240010 Sample Dates: 7/16/2012 - 7/23/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.28E-02 1.32E-03 3.30E-03 I-131 <6.21E-03 0.00E+00 6.21E-03 Cs-134 <5.51E-03 0.00E+00 5.51E-03 Cs-137 <9.21E-03 0.00E+00 9.21E-03 Be-7 1.03E-01 2.66E-02 5.13E-02 K-40 <1.60E-01 0.00E+00 1.60E-01 Sample ID: 240332 Sample Dates: 7/23/2012 - 7/30/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.99E-02 1.49E-03 3.22E-03 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 20 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 240332 Sample Dates: 7/23/2012 - 7/30/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.02E-02 0.00E+00 1.02E-02 Cs-134 <5.25E-03 0.00E+00 5.25E-03 Cs-137 <1.02E-02 0.00E+00 1.02E-02 Be-7 2.16E-01 4.06E-02 4.81E-02 K-40 <1.96E-01 0.00E+00 1.96E-01 Sample ID: 240967 Sample Dates: 7/30/2012 - 8/6/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.15E-02 1.47E-03 3.04E-03 I-131 <1.81E-02 0.00E+00 1.81E-02 Cs-134 <2.02E-02 0.00E+00 2.02E-02 Cs-137 <1.13E-02 0.00E+00 1.13E-02 Be-7 <1.90E-01 0.00E+00 1.90E-01 K-40 <3.55E-01 0.00E+00 3.55E-01 Sample ID: 241238 Sample Dates: 8/6/2012 - 8/13/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.11E-02 1.26E-03 3.22E-03 I-131 <5.13E-03 0.00E+00 5.13E-03 Cs-134 <4.93E-03 0.00E+00 4.93E-03 Cs-137 <8.95E-03 0.00E+00 8.95E-03 Be-7 1.45E-01 2.61E-02 4.71E-02 K-40 <2.00E-01 0.00E+00 2.00E-01 Sample ID: 241545 Sample Dates: 8/13/2012 - 8/20/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.75E-02 1.61E-03 3.10E-03 I-131 <6.92E-03 0.00E+00 6.92E-03 Cs-134 <7.54E-03 0.00E+00 7.54E-03 Cs-137 <1.06E-02 0.00E+00 1.06E-02 Be-7 1.50E-01 3.42E-02 6.44E-02 K-40 <2.18E-01 0.00E+00 2.18E-01 Sample ID: 242134 Sample Dates: 8/20/2012 - 8/27/2012 Nuclide Activity 1 Sigma Error LLD Beta 3.37E-02 1.80E-03 3.37E-03 I-131 <7.65E-03 0.00E+00 7.65E-03 Cs-134 <7.30E-03 0.00E+00 7.30E-03 Cs-137 <8.98E-03 0.00E+00 8.98E-03 Be-7 1.45E-01 3.44E-02 5.29E-02 K-40 1.68E-01 5.52E-02 1.41E-01 Sample ID: 242463 Sample Dates: 8/27/2012 - 9/4/2012 Nuclide Activity 1 Sigma Error LLD Beta 8.73E-03 1.13E-03 3.04E-03 I-131 <7.49E-03 0.00E+00 7.49E-03 Cs-134 <8.41E-03 0.00E+00 8.41E-03 Cs-137 <7.56E-03 0.00E+00 7.56E-03 Be-7 1.26E-01 2.10E-02 3.33E-02 K-40 <1.75E-01 0.00E+00 1.75E-01 Sample ID: 242990 Sample Dates: 9/4/2012 - 9/10/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.40E-02 1.54E-03 3.95E-03 I-131 <6.13E-03 0.00E+00 6.13E-03 Cs-134 <8.98E-03 0.00E+00 8.98E-03 Cs-137 <1.01E-02 0.00E+00 1.01E-02 Be-7 9.60E-02 3.68E-02 9.52E-02 K-40 <2.20E-01 0.00E+00 2.20E-01 Sample ID: 243748 Sample Dates: 9/10/2012 - 9/17/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.43E-02 1.60E-03 3.39E-03 I-131 <7.70E-03 0.00E+00 7.70E-03 Cs-134 <1.03E-02 0.00E+00 1.03E-02 Cs-137 <8.30E-03 0.00E+00 8.30E-03 Be-7 1.66E-01 4.10E-02 6.46E-02 K-40 <1.82E-01 0.00E+00 1.82E-01 Sample ID: 244153 Sample Dates: 9/17/2012 - 9/24/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.27E-02 1.52E-03 3.10E-03 I-131 <6.18E-03 0.00E+00 6.18E-03 Cs-134 <9.03E-03 0.00E+00 9.03E-03 Cs-137 <8.72E-03 0.00E+00 8.72E-03 Be-7 1.25E-01 2.78E-02 5.72E-02 K-40 <1.90E-01 0.00E+00 1.90E-01 Sample ID: 245024 Sample Dates: 9/24/2012 - 10/1/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.94E-02 1.69E-03 3.33E-03 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 21 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 245024 Sample Dates: 9/24/2012 - 10/1/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.62E-02 0.00E+00 1.62E-02 Cs-134 <1.82E-02 0.00E+00 1.82E-02 Cs-137 <1.73E-02 0.00E+00 1.73E-02 Be-7 2.00E-01 5.28E-02 1.68E-01 K-40 <3.84E-01 0.00E+00 3.84E-01 Sample ID: 245844 Sample Dates: 10/1/2012 - 10/8/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.73E-02 1.64E-03 3.26E-03 I-131 <5.72E-03 0.00E+00 5.72E-03 Cs-134 <6.23E-03 0.00E+00 6.23E-03 Cs-137 <7.90E-03 0.00E+00 7.90E-03 Be-7 1.24E-01 3.56E-02 3.99E-02 K-40 <1.88E-01 0.00E+00 1.88E-01 Sample ID: 246699 Sample Dates: 10/8/2012 - 10/15/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.60E-02 1.62E-03 3.25E-03 I-131 <7.89E-03 0.00E+00 7.89E-03 Cs-134 <7.50E-03 0.00E+00 7.50E-03 Cs-137 <1.12E-02 0.00E+00 1.12E-02 Be-7 1.56E-01 3.43E-02 5.82E-02 K-40 <1.64E-01 0.00E+00 1.64E-01 Sample ID: 247107 Sample Dates: 10/15/2012 - 10/22/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.44E-02 1.63E-03 3.52E-03 I-131 <1.43E-02 0.00E+00 1.43E-02 Cs-134 <1.69E-02 0.00E+00 1.69E-02 Cs-137 <1.79E-02 0.00E+00 1.79E-02 Be-7 6.22E-02 3.96E-02 2.75E-02 K-40 <5.70E-01 0.00E+00 5.70E-01 Sample ID: 247423 Sample Dates: 10/22/2012 - 10/29/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.98E-02 1.73E-03 3.51E-03 I-131 <1.67E-02 0.00E+00 1.67E-02 Cs-134 <1.92E-02 0.00E+00 1.92E-02 Cs-137 <2.41E-02 0.00E+00 2.41E-02 Be-7 <1.64E-01 0.00E+00 1.64E-01 K-40 <3.84E-01 0.00E+00 3.84E-01 Sample ID: 247761 Sample Dates: 10/29/2012 - 11/5/2012 Nuclide Activity 1 Sigma Error LLD Beta 3.03E-02 1.72E-03 3.33E-03 I-131 <1.98E-02 0.00E+00 1.98E-02 Cs-134 <1.87E-02 0.00E+00 1.87E-02 Cs-137 <1.75E-02 0.00E+00 1.75E-02 Be-7 1.34E-01 5.14E-02 1.61E-01 K-40 <5.10E-01 0.00E+00 5.10E-01 Sample ID: 247956 Sample Dates: 11/5/2012 - 11/12/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.99E-02 1.48E-03 3.26E-03 I-131 <1.56E-02 0.00E+00 1.56E-02 Cs-134 <1.26E-02 0.00E+00 1.26E-02 Cs-137 <2.12E-02 0.00E+00 2.12E-02 Be-7 1.79E-01 6.71E-02 1.59E-01 K-40 1.85E-01 1.10E-01 3.06E-01 Sample ID: 248360 Sample Dates: 11/12/2012 - 11/19/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.41E-02 1.74E-03 4.13E-03 I-131 <1.33E-02 0.00E+00 1.33E-02 Cs-134 <2.07E-02 0.00E+00 2.07E-02 Cs-137 <2.39E-02 0.00E+00 2.39E-02 Be-7 1.91E-01 6.68E-02 1.34E-01 K-40 <4.46E-01 0.00E+00 4.46E-01 Sample ID: 248639 Sample Dates: 11/19/2012 - 11/26/2012 Nuclide Activity 1 Sigma Error LLD Beta 3.46E-02 1.82E-03 3.44E-03 I-131 <2.32E-02 0.00E+00 2.32E-02 Cs-134 <1.94E-02 0.00E+00 1.94E-02 Cs-137 <1.96E-02 0.00E+00 1.96E-02 Be-7 1.29E-01 6.03E-02 1.69E-01 K-40 3.56E-01 1.03E-01 2.85E-01 Sample ID: 249012 Sample Dates: 11/26/2012 - 12/3/2012 Nuclide Activity 1 Sigma Error LLD Beta 3.53E-02 1.79E-03 3.22E-03 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 22 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 249012 Sample Dates: 11/26/2012 - 12/3/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.71E-02 0.00E+00 1.71E-02 Cs-134 <1.78E-02 0.00E+00 1.78E-02 Cs-137 <1.54E-02 0.00E+00 1.54E-02 Be-7 <2.28E-01 0.00E+00 2.28E-01 K-40 <4.64E-01 0.00E+00 4.64E-01 Sample ID: 249251 Sample Dates: 12/3/2012 - 12/10/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.02E-02 1.54E-03 3.55E-03 I-131 <1.82E-02 0.00E+00 1.82E-02 Cs-134 <2.04E-02 0.00E+00 2.04E-02 Cs-137 <2.24E-02 0.00E+00 2.24E-02 Be-7 1.84E-01 4.91E-02 1.18E-01 K-40 <3.11E-01 0.00E+00 3.11E-01 Sample ID: 249449 Sample Dates: 12/10/2012 - 12/17/2012 Nuclide Activity 1 Sigma Error LLD Beta 3.18E-02 1.78E-03 3.48E-03 I-131 <2.02E-02 0.00E+00 2.02E-02 Cs-134 <2.07E-02 0.00E+00 2.07E-02 Cs-137 <1.98E-02 0.00E+00 1.98E-02 Be-7 1.67E-01 4.17E-02 9.57E-02 K-40 <2.96E-01 0.00E+00 2.96E-01 Sample ID: 249876 Sample Dates: 12/17/2012 - 12/24/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.41E-02 1.56E-03 3.19E-03 I-131 <2.06E-02 0.00E+00 2.06E-02 Cs-134 <1.79E-02 0.00E+00 1.79E-02 Cs-137 <2.09E-02 0.00E+00 2.09E-02 Be-7 1.55E-01 4.80E-02 9.64E-02 K-40 <3.86E-01 0.00E+00 3.86E-01 Sample ID: 250183 Sample Dates: 12/24/2012 - 12/31/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.48E-02 1.41E-03 3.47E-03 I-131 <1.49E-02 0.00E+00 1.49E-02 Cs-134 <1.84E-02 0.00E+00 1.84E-02 Cs-137 <2.18E-02 0.00E+00 2.18E-02 Be-7 1.46E-01 4.67E-02 1.24E-01 K-40 <4.18E-01 0.00E+00 4.18E-01 Sample Point 081 [ CONTROL - SE @ 9.33 miles ]

Sample ID: 227187 Sample Dates: 1/3/2012 - 1/9/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.63E-02 1.55E-03 3.71E-03 I-131 <6.88E-03 0.00E+00 6.88E-03 Cs-134 <3.78E-03 0.00E+00 3.78E-03 Cs-137 <6.69E-03 0.00E+00 6.69E-03 Be-7 1.53E-01 3.21E-02 5.53E-02 K-40 <1.83E-01 0.00E+00 1.83E-01 Sample ID: 227321 Sample Dates: 1/9/2012 - 1/16/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.82E-02 1.41E-03 3.07E-03 I-131 <1.81E-02 0.00E+00 1.81E-02 Cs-134 <2.37E-02 0.00E+00 2.37E-02 Cs-137 <1.65E-02 0.00E+00 1.65E-02 Be-7 1.35E-01 5.44E-02 1.12E-01 K-40 <4.70E-01 0.00E+00 4.70E-01 Sample ID: 227535 Sample Dates: 1/16/2012 - 1/23/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.91E-02 1.44E-03 3.14E-03 I-131 <6.23E-03 0.00E+00 6.23E-03 Cs-134 <7.67E-03 0.00E+00 7.67E-03 Cs-137 <8.25E-03 0.00E+00 8.25E-03 Be-7 8.53E-02 3.21E-02 7.30E-02 K-40 1.31E-01 4.36E-02 3.93E-02 Sample ID: 227857 Sample Dates: 1/23/2012 - 1/30/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.44E-02 1.41E-03 3.52E-03 I-131 <7.66E-03 0.00E+00 7.66E-03 Cs-134 <9.56E-03 0.00E+00 9.56E-03 Cs-137 <9.41E-03 0.00E+00 9.41E-03 Be-7 9.23E-02 3.09E-02 5.16E-02 K-40 9.90E-02 5.48E-02 1.25E-01 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 23 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 228124 Sample Dates: 1/30/2012 - 2/6/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.83E-02 1.49E-03 3.46E-03 I-131 <8.22E-03 0.00E+00 8.22E-03 Cs-134 <8.81E-03 0.00E+00 8.81E-03 Cs-137 <1.34E-02 0.00E+00 1.34E-02 Be-7 1.53E-01 4.16E-02 5.67E-02 K-40 <2.02E-01 0.00E+00 2.02E-01 Sample ID: 229435 Sample Dates: 2/6/2012 - 2/13/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.04E-02 1.52E-03 3.34E-03 I-131 <1.96E-02 0.00E+00 1.96E-02 Cs-134 <1.82E-02 0.00E+00 1.82E-02 Cs-137 <1.53E-02 0.00E+00 1.53E-02 Be-7 1.04E-01 3.30E-02 1.54E-01 K-40 <4.22E-01 0.00E+00 4.22E-01 Sample ID: 230061 Sample Dates: 2/13/2012 - 2/20/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.09E-02 1.22E-03 3.07E-03 I-131 <5.43E-03 0.00E+00 5.43E-03 Cs-134 <6.97E-03 0.00E+00 6.97E-03 Cs-137 <6.75E-03 0.00E+00 6.75E-03 Be-7 1.17E-01 2.97E-02 4.78E-02 K-40 <1.37E-01 0.00E+00 1.37E-01 Sample ID: 230736 Sample Dates: 2/20/2012 - 2/27/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.42E-02 1.30E-03 3.00E-03 I-131 <6.31E-03 0.00E+00 6.31E-03 Cs-134 <7.15E-03 0.00E+00 7.15E-03 Cs-137 <8.03E-03 0.00E+00 8.03E-03 Be-7 1.34E-01 3.53E-02 5.80E-02 K-40 <1.56E-01 0.00E+00 1.56E-01 Sample ID: 230945 Sample Dates: 2/27/2012 - 3/5/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.04E-02 1.32E-03 3.55E-03 I-131 <1.03E-02 0.00E+00 1.03E-02 Cs-134 <2.09E-02 0.00E+00 2.09E-02 Cs-137 <2.31E-02 0.00E+00 2.31E-02 Be-7 1.36E-01 6.22E-02 1.45E-01 K-40 <3.57E-01 0.00E+00 3.57E-01 Sample ID: 231655 Sample Dates: 3/5/2012 - 3/12/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.51E-02 1.40E-03 3.38E-03 I-131 <8.98E-03 0.00E+00 8.98E-03 Cs-134 <6.50E-03 0.00E+00 6.50E-03 Cs-137 <1.00E-02 0.00E+00 1.00E-02 Be-7 2.18E-01 3.66E-02 5.22E-02 K-40 <1.33E-01 0.00E+00 1.33E-01 Sample ID: 232469 Sample Dates: 3/12/2012 - 3/19/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.13E-02 1.31E-03 3.38E-03 I-131 <7.22E-03 0.00E+00 7.22E-03 Cs-134 <5.82E-03 0.00E+00 5.82E-03 Cs-137 <1.10E-02 0.00E+00 1.10E-02 Be-7 1.54E-01 2.67E-02 4.15E-02 K-40 <1.62E-01 0.00E+00 1.62E-01 Sample ID: 233309 Sample Dates: 3/19/2012 - 3/26/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.44E-02 1.37E-03 3.32E-03 I-131 <7.57E-03 0.00E+00 7.57E-03 Cs-134 <6.53E-03 0.00E+00 6.53E-03 Cs-137 <7.32E-03 0.00E+00 7.32E-03 Be-7 1.36E-01 2.84E-02 4.10E-02 K-40 <2.28E-01 0.00E+00 2.28E-01 Sample ID: 233550 Sample Dates: 3/26/2012 - 4/2/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.56E-02 1.34E-03 3.05E-03 I-131 <9.27E-03 0.00E+00 9.27E-03 Cs-134 <7.79E-03 0.00E+00 7.79E-03 Cs-137 <1.09E-02 0.00E+00 1.09E-02 Be-7 1.09E-01 5.04E-02 8.92E-02 K-40 <1.72E-01 0.00E+00 1.72E-01 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 24 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 234468 Sample Dates: 4/2/2012 - 4/9/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.43E-02 1.40E-03 3.47E-03 I-131 <6.22E-03 0.00E+00 6.22E-03 Cs-134 <7.12E-03 0.00E+00 7.12E-03 Cs-137 <7.01E-03 0.00E+00 7.01E-03 Be-7 1.90E-01 3.58E-02 6.30E-02 K-40 <1.92E-01 0.00E+00 1.92E-01 Sample ID: 234896 Sample Dates: 4/9/2012 - 4/16/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.73E-02 1.50E-03 3.62E-03 I-131 <7.60E-03 0.00E+00 7.60E-03 Cs-134 <7.16E-03 0.00E+00 7.16E-03 Cs-137 <7.48E-03 0.00E+00 7.48E-03 Be-7 2.03E-01 3.44E-02 5.75E-02 K-40 2.03E-01 5.67E-02 1.05E-01 Sample ID: 235218 Sample Dates: 4/16/2012 - 4/23/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.52E-02 1.33E-03 3.06E-03 I-131 <1.95E-02 0.00E+00 1.95E-02 Cs-134 <1.84E-02 0.00E+00 1.84E-02 Cs-137 <1.88E-02 0.00E+00 1.88E-02 Be-7 2.91E-01 5.50E-02 1.32E-01 K-40 <4.20E-01 0.00E+00 4.20E-01 Sample ID: 235403 Sample Dates: 4/23/2012 - 4/30/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.19E-02 1.55E-03 3.38E-03 I-131 <7.00E-03 0.00E+00 7.00E-03 Cs-134 <8.11E-03 0.00E+00 8.11E-03 Cs-137 <9.85E-03 0.00E+00 9.85E-03 Be-7 1.33E-01 2.92E-02 6.37E-02 K-40 <1.74E-01 0.00E+00 1.74E-01 Sample ID: 235741 Sample Dates: 4/30/2012 - 5/7/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.45E-02 1.36E-03 3.26E-03 I-131 <7.88E-03 0.00E+00 7.88E-03 Cs-134 <7.58E-03 0.00E+00 7.58E-03 Cs-137 <9.01E-03 0.00E+00 9.01E-03 Be-7 1.36E-01 3.19E-02 6.72E-02 K-40 <1.56E-01 0.00E+00 1.56E-01 Sample ID: 235987 Sample Dates: 5/7/2012 - 5/14/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.88E-02 1.43E-03 3.12E-03 I-131 <3.91E-03 0.00E+00 3.91E-03 Cs-134 <4.92E-03 0.00E+00 4.92E-03 Cs-137 <1.20E-02 0.00E+00 1.20E-02 Be-7 1.43E-01 3.95E-02 6.25E-02 K-40 <1.89E-01 0.00E+00 1.89E-01 Sample ID: 236197 Sample Dates: 5/14/2012 - 5/21/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.71E-02 1.49E-03 3.60E-03 I-131 <9.29E-03 0.00E+00 9.29E-03 Cs-134 <7.71E-03 0.00E+00 7.71E-03 Cs-137 <1.39E-02 0.00E+00 1.39E-02 Be-7 1.82E-01 3.09E-02 3.77E-02 K-40 <2.43E-01 0.00E+00 2.43E-01 Sample ID: 236510 Sample Dates: 5/21/2012 - 5/29/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.30E-02 1.37E-03 2.57E-03 I-131 <6.16E-03 0.00E+00 6.16E-03 Cs-134 <4.99E-03 0.00E+00 4.99E-03 Cs-137 <7.73E-03 0.00E+00 7.73E-03 Be-7 1.50E-01 2.86E-02 4.49E-02 K-40 2.28E-01 4.47E-02 7.85E-02 Sample ID: 236809 Sample Dates: 5/29/2012 - 6/4/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.64E-02 1.60E-03 3.92E-03 I-131 <1.30E-02 0.00E+00 1.30E-02 Cs-134 <1.25E-02 0.00E+00 1.25E-02 Cs-137 <9.66E-03 0.00E+00 9.66E-03 Be-7 2.16E-01 4.64E-02 8.28E-02 K-40 <2.30E-01 0.00E+00 2.30E-01 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 25 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 237135 Sample Dates: 6/4/2012 - 6/11/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.70E-02 1.42E-03 3.27E-03 I-131 <5.49E-03 0.00E+00 5.49E-03 Cs-134 <8.48E-03 0.00E+00 8.48E-03 Cs-137 <9.99E-03 0.00E+00 9.99E-03 Be-7 1.62E-01 3.63E-02 7.32E-02 K-40 <1.19E-01 0.00E+00 1.19E-01 Sample ID: 237310 Sample Dates: 6/11/2012 - 6/18/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.49E-02 1.32E-03 3.04E-03 I-131 <7.11E-03 0.00E+00 7.11E-03 Cs-134 <7.11E-03 0.00E+00 7.11E-03 Cs-137 <1.12E-02 0.00E+00 1.12E-02 Be-7 1.79E-01 3.60E-02 6.24E-02 K-40 1.44E-01 5.72E-02 9.64E-02 Sample ID: 237986 Sample Dates: 6/18/2012 - 6/25/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.31E-02 1.51E-03 3.02E-03 I-131 <1.81E-02 0.00E+00 1.81E-02 Cs-134 <1.20E-02 0.00E+00 1.20E-02 Cs-137 <1.20E-02 0.00E+00 1.20E-02 Be-7 1.60E-01 4.93E-02 1.46E-01 K-40 <4.83E-01 0.00E+00 4.83E-01 Sample ID: 238738 Sample Dates: 6/25/2012 - 7/2/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.68E-02 1.69E-03 3.48E-03 I-131 <6.89E-03 0.00E+00 6.89E-03 Cs-134 <7.90E-03 0.00E+00 7.90E-03 Cs-137 <9.01E-03 0.00E+00 9.01E-03 Be-7 2.41E-01 3.78E-02 5.61E-02 K-40 <1.84E-01 0.00E+00 1.84E-01 Sample ID: 239115 Sample Dates: 7/2/2012 - 7/9/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.57E-02 1.60E-03 3.21E-03 I-131 <7.36E-03 0.00E+00 7.36E-03 Cs-134 <6.23E-03 0.00E+00 6.23E-03 Cs-137 <1.16E-02 0.00E+00 1.16E-02 Be-7 1.55E-01 3.56E-02 5.49E-02 K-40 <2.10E-01 0.00E+00 2.10E-01 Sample ID: 239887 Sample Dates: 7/9/2012 - 7/16/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.20E-02 1.24E-03 3.02E-03 I-131 <2.10E-02 0.00E+00 2.10E-02 Cs-134 <1.91E-02 0.00E+00 1.91E-02 Cs-137 <1.74E-02 0.00E+00 1.74E-02 Be-7 8.53E-02 5.29E-02 1.46E-01 K-40 <3.20E-01 0.00E+00 3.20E-01 Sample ID: 240011 Sample Dates: 7/16/2012 - 7/23/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.23E-02 1.32E-03 3.35E-03 I-131 <6.63E-03 0.00E+00 6.63E-03 Cs-134 <6.76E-03 0.00E+00 6.76E-03 Cs-137 <8.75E-03 0.00E+00 8.75E-03 Be-7 9.82E-02 2.73E-02 5.70E-02 K-40 <1.85E-01 0.00E+00 1.85E-01 Sample ID: 240333 Sample Dates: 7/23/2012 - 7/30/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.49E-02 1.35E-03 3.16E-03 I-131 <5.86E-03 0.00E+00 5.86E-03 Cs-134 <6.00E-03 0.00E+00 6.00E-03 Cs-137 <7.69E-03 0.00E+00 7.69E-03 Be-7 9.79E-02 2.94E-02 4.48E-02 K-40 <1.70E-01 0.00E+00 1.70E-01 Sample ID: 240968 Sample Dates: 7/30/2012 - 8/6/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.99E-02 1.45E-03 3.06E-03 I-131 <1.71E-02 0.00E+00 1.71E-02 Cs-134 <1.53E-02 0.00E+00 1.53E-02 Cs-137 <1.68E-02 0.00E+00 1.68E-02 Be-7 9.19E-02 4.62E-02 1.35E-01 K-40 <3.57E-01 0.00E+00 3.57E-01 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 26 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 241239 Sample Dates: 8/6/2012 - 8/13/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.37E-02 1.33E-03 3.22E-03 I-131 <8.61E-03 0.00E+00 8.61E-03 Cs-134 <8.09E-03 0.00E+00 8.09E-03 Cs-137 <8.71E-03 0.00E+00 8.71E-03 Be-7 9.88E-02 3.49E-02 6.29E-02 K-40 2.04E-01 5.55E-02 8.28E-02 Sample ID: 241546 Sample Dates: 8/13/2012 - 8/20/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.71E-02 1.61E-03 3.15E-03 I-131 <1.41E-02 0.00E+00 1.41E-02 Cs-134 <1.90E-02 0.00E+00 1.90E-02 Cs-137 <1.77E-02 0.00E+00 1.77E-02 Be-7 2.30E-01 5.74E-02 1.48E-01 K-40 <4.87E-01 0.00E+00 4.87E-01 Sample ID: 242135 Sample Dates: 8/20/2012 - 8/27/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.67E-02 1.64E-03 3.33E-03 I-131 <1.65E-02 0.00E+00 1.65E-02 Cs-134 <2.39E-02 0.00E+00 2.39E-02 Cs-137 <2.18E-02 0.00E+00 2.18E-02 Be-7 1.42E-01 6.51E-02 1.43E-01 K-40 <4.18E-01 0.00E+00 4.18E-01 Sample ID: 242464 Sample Dates: 8/27/2012 - 9/4/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.16E-02 1.20E-03 3.02E-03 I-131 <5.14E-03 0.00E+00 5.14E-03 Cs-134 <8.81E-03 0.00E+00 8.81E-03 Cs-137 <1.00E-02 0.00E+00 1.00E-02 Be-7 1.18E-01 2.63E-02 3.86E-02 K-40 <1.93E-01 0.00E+00 1.93E-01 Sample ID: 242991 Sample Dates: 9/4/2012 - 9/10/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.76E-02 1.63E-03 3.96E-03 I-131 <9.27E-03 0.00E+00 9.27E-03 Cs-134 <7.07E-03 0.00E+00 7.07E-03 Cs-137 <1.10E-02 0.00E+00 1.10E-02 Be-7 1.35E-01 3.59E-02 4.78E-02 K-40 <2.12E-01 0.00E+00 2.12E-01 Sample ID: 243749 Sample Dates: 9/10/2012 - 9/17/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.46E-02 1.61E-03 3.42E-03 I-131 <6.18E-03 0.00E+00 6.18E-03 Cs-134 <9.71E-03 0.00E+00 9.71E-03 Cs-137 <9.15E-03 0.00E+00 9.15E-03 Be-7 1.06E-01 3.18E-02 1.36E-02 K-40 <1.90E-01 0.00E+00 1.90E-01 Sample ID: 244154 Sample Dates: 9/17/2012 - 9/24/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.17E-02 1.49E-03 3.07E-03 I-131 <7.08E-03 0.00E+00 7.08E-03 Cs-134 <6.89E-03 0.00E+00 6.89E-03 Cs-137 <9.84E-03 0.00E+00 9.84E-03 Be-7 7.34E-02 3.68E-02 6.30E-02 K-40 <2.36E-01 0.00E+00 2.36E-01 Sample ID: 245025 Sample Dates: 9/24/2012 - 10/1/2012 Nuclide Activity 1 Sigma Error LLD Beta 3.28E-02 1.77E-03 3.36E-03 I-131 <4.12E-03 0.00E+00 4.12E-03 Cs-134 <5.71E-03 0.00E+00 5.71E-03 Cs-137 <1.83E-03 0.00E+00 1.83E-03 Be-7 1.68E-01 3.00E-02 3.23E-02 K-40 <1.35E-01 0.00E+00 1.35E-01 Sample ID: 245845 Sample Dates: 10/1/2012 - 10/8/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.92E-02 1.68E-03 3.25E-03 I-131 <8.42E-03 0.00E+00 8.42E-03 Cs-134 <8.07E-03 0.00E+00 8.07E-03 Cs-137 <1.12E-02 0.00E+00 1.12E-02 Be-7 1.03E-01 2.32E-02 4.78E-02 K-40 <2.28E-01 0.00E+00 2.28E-01 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 27 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 246700 Sample Dates: 10/8/2012 - 10/15/2012 Nuclide Activity 1 Sigma Error LLD Beta 3.06E-02 1.67E-03 3.12E-03 I-131 <1.71E-02 0.00E+00 1.71E-02 Cs-134 <1.97E-02 0.00E+00 1.97E-02 Cs-137 <1.41E-02 0.00E+00 1.41E-02 Be-7 1.53E-01 4.76E-02 1.37E-01 K-40 <3.43E-01 0.00E+00 3.43E-01 Sample ID: 247108 Sample Dates: 10/15/2012 - 10/22/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.27E-02 1.64E-03 3.66E-03 I-131 <1.82E-02 0.00E+00 1.82E-02 Cs-134 <1.85E-02 0.00E+00 1.85E-02 Cs-137 <4.51E-03 0.00E+00 4.51E-03 Be-7 1.82E-01 4.98E-02 1.48E-01 K-40 <3.99E-01 0.00E+00 3.99E-01 Sample ID: 247424 Sample Dates: 10/22/2012 - 10/29/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.43E-02 1.63E-03 3.53E-03 I-131 <1.62E-02 0.00E+00 1.62E-02 Cs-134 <2.00E-02 0.00E+00 2.00E-02 Cs-137 <1.85E-02 0.00E+00 1.85E-02 Be-7 <1.99E-01 0.00E+00 1.99E-01 K-40 <3.81E-01 0.00E+00 3.81E-01 Sample ID: 247762 Sample Dates: 10/29/2012 - 11/5/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.78E-02 1.67E-03 3.33E-03 I-131 <1.56E-02 0.00E+00 1.56E-02 Cs-134 <1.56E-02 0.00E+00 1.56E-02 Cs-137 <2.02E-02 0.00E+00 2.02E-02 Be-7 1.85E-01 5.63E-02 9.43E-02 K-40 <4.97E-01 0.00E+00 4.97E-01 Sample ID: 247957 Sample Dates: 11/5/2012 - 11/12/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.63E-02 1.62E-03 3.28E-03 I-131 <2.04E-02 0.00E+00 2.04E-02 Cs-134 <1.78E-02 0.00E+00 1.78E-02 Cs-137 <1.63E-02 0.00E+00 1.63E-02 Be-7 2.27E-01 6.30E-02 1.21E-01 K-40 <3.84E-01 0.00E+00 3.84E-01 Sample ID: 248361 Sample Dates: 11/12/2012 - 11/19/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.76E-02 1.81E-03 4.12E-03 I-131 <1.86E-02 0.00E+00 1.86E-02 Cs-134 <1.47E-02 0.00E+00 1.47E-02 Cs-137 <1.79E-02 0.00E+00 1.79E-02 Be-7 1.08E-01 4.61E-02 1.31E-01 K-40 <2.98E-01 0.00E+00 2.98E-01 Sample ID: 248640 Sample Dates: 11/19/2012 - 11/26/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.97E-02 1.72E-03 3.42E-03 I-131 <1.93E-02 0.00E+00 1.93E-02 Cs-134 <2.11E-02 0.00E+00 2.11E-02 Cs-137 <1.74E-02 0.00E+00 1.74E-02 Be-7 1.95E-01 4.47E-02 1.09E-01 K-40 <6.03E-01 0.00E+00 6.03E-01 Sample ID: 249013 Sample Dates: 11/26/2012 - 12/3/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.84E-02 1.66E-03 3.24E-03 I-131 <1.96E-02 0.00E+00 1.96E-02 Cs-134 <1.64E-02 0.00E+00 1.64E-02 Cs-137 <2.16E-02 0.00E+00 2.16E-02 Be-7 1.88E-01 5.36E-02 1.52E-01 K-40 <3.54E-01 0.00E+00 3.54E-01 Sample ID: 249252 Sample Dates: 12/3/2012 - 12/10/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.56E-02 1.45E-03 3.59E-03 I-131 <1.70E-02 0.00E+00 1.70E-02 Cs-134 <1.26E-02 0.00E+00 1.26E-02 Cs-137 <1.74E-02 0.00E+00 1.74E-02 Be-7 8.34E-02 3.68E-02 1.41E-01 K-40 <4.13E-01 0.00E+00 4.13E-01 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 28 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 249450 Sample Dates: 12/10/2012 - 12/17/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.62E-02 1.65E-03 3.44E-03 I-131 <1.77E-02 0.00E+00 1.77E-02 Cs-134 <2.06E-02 0.00E+00 2.06E-02 Cs-137 <1.77E-02 0.00E+00 1.77E-02 Be-7 1.75E-01 4.95E-02 1.12E-01 K-40 <4.92E-01 0.00E+00 4.92E-01 Sample ID: 249877 Sample Dates: 12/17/2012 - 12/24/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.34E-02 1.54E-03 3.18E-03 I-131 <1.71E-02 0.00E+00 1.71E-02 Cs-134 <1.40E-02 0.00E+00 1.40E-02 Cs-137 <1.18E-02 0.00E+00 1.18E-02 Be-7 1.78E-01 6.13E-02 8.89E-02 K-40 <3.51E-01 0.00E+00 3.51E-01 Sample ID: 250184 Sample Dates: 12/24/2012 - 12/31/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.44E-02 1.40E-03 3.48E-03 I-131 <1.90E-02 0.00E+00 1.90E-02 Cs-134 <2.09E-02 0.00E+00 2.09E-02 Cs-137 <2.01E-02 0.00E+00 2.01E-02 Be-7 <1.66E-01 0.00E+00 1.66E-01 K-40 2.08E-01 7.86E-02 3.30E-01 Sample Point 084 [ INDICATOR - NNE @ 2.58 miles ]

Sample ID: 227188 Sample Dates: 1/3/2012 - 1/9/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.89E-02 1.61E-03 3.71E-03 I-131 <9.05E-03 0.00E+00 9.05E-03 Cs-134 <8.52E-03 0.00E+00 8.52E-03 Cs-137 <1.09E-02 0.00E+00 1.09E-02 Be-7 1.32E-01 2.88E-02 1.70E-02 K-40 <2.11E-01 0.00E+00 2.11E-01 Sample ID: 227322 Sample Dates: 1/9/2012 - 1/16/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.91E-02 1.44E-03 3.09E-03 I-131 <1.29E-02 0.00E+00 1.29E-02 Cs-134 <1.28E-02 0.00E+00 1.28E-02 Cs-137 <1.62E-02 0.00E+00 1.62E-02 Be-7 <1.90E-01 0.00E+00 1.90E-01 K-40 <4.20E-01 0.00E+00 4.20E-01 Sample ID: 227536 Sample Dates: 1/16/2012 - 1/23/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.98E-02 1.46E-03 3.14E-03 I-131 <8.27E-03 0.00E+00 8.27E-03 Cs-134 <1.09E-02 0.00E+00 1.09E-02 Cs-137 <1.04E-02 0.00E+00 1.04E-02 Be-7 1.29E-01 3.64E-02 5.66E-02 K-40 <2.75E-01 0.00E+00 2.75E-01 Sample ID: 227858 Sample Dates: 1/23/2012 - 1/30/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.38E-02 1.39E-03 3.52E-03 I-131 <5.35E-03 0.00E+00 5.35E-03 Cs-134 <6.38E-03 0.00E+00 6.38E-03 Cs-137 <7.43E-03 0.00E+00 7.43E-03 Be-7 1.52E-01 3.10E-02 5.09E-02 K-40 <1.85E-01 0.00E+00 1.85E-01 Sample ID: 228125 Sample Dates: 1/30/2012 - 2/6/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.82E-02 1.46E-03 3.39E-03 I-131 <5.32E-03 0.00E+00 5.32E-03 Cs-134 <6.68E-03 0.00E+00 6.68E-03 Cs-137 <7.11E-03 0.00E+00 7.11E-03 Be-7 1.54E-01 2.85E-02 4.80E-02 K-40 <1.89E-01 0.00E+00 1.89E-01 Sample ID: 229436 Sample Dates: 2/6/2012 - 2/13/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.48E-02 1.62E-03 3.39E-03 I-131 <5.33E-03 0.00E+00 5.33E-03 Cs-134 <8.35E-03 0.00E+00 8.35E-03 Cs-137 <9.15E-03 0.00E+00 9.15E-03 Be-7 8.36E-02 2.36E-02 6.31E-02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 29 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 229436 Sample Dates: 2/6/2012 - 2/13/2012 Nuclide Activity 1 Sigma Error LLD K-40 <1.93E-01 0.00E+00 1.93E-01 Sample ID: 230062 Sample Dates: 2/13/2012 - 2/20/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.76E-02 1.39E-03 3.07E-03 I-131 <4.65E-03 0.00E+00 4.65E-03 Cs-134 <7.28E-03 0.00E+00 7.28E-03 Cs-137 <9.68E-03 0.00E+00 9.68E-03 Be-7 1.27E-01 3.00E-02 5.27E-02 K-40 <2.04E-01 0.00E+00 2.04E-01 Sample ID: 230737 Sample Dates: 2/20/2012 - 2/27/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.69E-02 1.37E-03 3.02E-03 I-131 <4.28E-03 0.00E+00 4.28E-03 Cs-134 <1.10E-02 0.00E+00 1.10E-02 Cs-137 <1.06E-02 0.00E+00 1.06E-02 Be-7 1.44E-01 3.25E-02 7.75E-02 K-40 1.56E-01 5.20E-02 1.43E-01 Sample ID: 230946 Sample Dates: 2/27/2012 - 3/5/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.12E-02 1.33E-03 3.51E-03 I-131 <1.75E-02 0.00E+00 1.75E-02 Cs-134 <1.47E-02 0.00E+00 1.47E-02 Cs-137 <1.74E-02 0.00E+00 1.74E-02 Be-7 1.71E-01 6.32E-02 1.37E-01 K-40 <3.16E-01 0.00E+00 3.16E-01 Sample ID: 231656 Sample Dates: 3/5/2012 - 3/12/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.67E-02 1.45E-03 3.42E-03 I-131 <9.19E-03 0.00E+00 9.19E-03 Cs-134 <5.68E-03 0.00E+00 5.68E-03 Cs-137 <7.51E-03 0.00E+00 7.51E-03 Be-7 2.21E-01 3.20E-02 5.28E-02 K-40 1.89E-01 6.94E-02 1.06E-01 Sample ID: 232470 Sample Dates: 3/12/2012 - 3/19/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.35E-02 1.35E-03 3.36E-03 I-131 <6.66E-03 0.00E+00 6.66E-03 Cs-134 <6.20E-03 0.00E+00 6.20E-03 Cs-137 <8.37E-03 0.00E+00 8.37E-03 Be-7 1.56E-01 3.03E-02 6.31E-02 K-40 <2.36E-01 0.00E+00 2.36E-01 Sample ID: 233310 Sample Dates: 3/19/2012 - 3/26/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.59E-02 1.40E-03 3.33E-03 I-131 <8.58E-03 0.00E+00 8.58E-03 Cs-134 <1.07E-02 0.00E+00 1.07E-02 Cs-137 <7.98E-03 0.00E+00 7.98E-03 Be-7 1.68E-01 4.22E-02 8.27E-02 K-40 <2.42E-01 0.00E+00 2.42E-01 Sample ID: 233551 Sample Dates: 3/26/2012 - 4/2/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.88E-02 1.40E-03 2.99E-03 I-131 <1.87E-02 0.00E+00 1.87E-02 Cs-134 <1.91E-02 0.00E+00 1.91E-02 Cs-137 <1.60E-02 0.00E+00 1.60E-02 Be-7 2.13E-01 4.65E-02 1.31E-01 K-40 <5.48E-01 0.00E+00 5.48E-01 Sample ID: 234469 Sample Dates: 4/2/2012 - 4/9/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.75E-02 1.49E-03 3.53E-03 I-131 <8.55E-03 0.00E+00 8.55E-03 Cs-134 <8.16E-03 0.00E+00 8.16E-03 Cs-137 <9.98E-03 0.00E+00 9.98E-03 Be-7 2.02E-01 3.37E-02 7.49E-02 K-40 <1.91E-01 0.00E+00 1.91E-01 Sample ID: 234897 Sample Dates: 4/9/2012 - 4/16/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.03E-02 1.56E-03 3.62E-03 I-131 <1.57E-02 0.00E+00 1.57E-02 Cs-134 <1.01E-02 0.00E+00 1.01E-02 Cs-137 <1.20E-02 0.00E+00 1.20E-02 Be-7 1.91E-01 6.03E-02 1.34E-01 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 30 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 234897 Sample Dates: 4/9/2012 - 4/16/2012 Nuclide Activity 1 Sigma Error LLD K-40 <4.68E-01 0.00E+00 4.68E-01 Sample ID: 235219 Sample Dates: 4/16/2012 - 4/23/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.42E-02 1.31E-03 3.07E-03 I-131 <1.93E-02 0.00E+00 1.93E-02 Cs-134 <1.80E-02 0.00E+00 1.80E-02 Cs-137 <1.89E-02 0.00E+00 1.89E-02 Be-7 1.88E-01 6.75E-02 1.54E-01 K-40 <4.21E-01 0.00E+00 4.21E-01 Sample ID: 235404 Sample Dates: 4/23/2012 - 4/30/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.67E-02 1.64E-03 3.34E-03 I-131 <5.52E-03 0.00E+00 5.52E-03 Cs-134 <9.72E-03 0.00E+00 9.72E-03 Cs-137 <1.04E-02 0.00E+00 1.04E-02 Be-7 1.92E-01 2.96E-02 1.24E-02 K-40 <1.66E-01 0.00E+00 1.66E-01 Sample ID: 235742 Sample Dates: 4/30/2012 - 5/7/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.59E-02 1.40E-03 3.28E-03 I-131 <8.45E-03 0.00E+00 8.45E-03 Cs-134 <8.65E-03 0.00E+00 8.65E-03 Cs-137 <1.13E-02 0.00E+00 1.13E-02 Be-7 2.18E-01 4.53E-02 7.36E-02 K-40 <2.46E-01 0.00E+00 2.46E-01 Sample ID: 235988 Sample Dates: 5/7/2012 - 5/14/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.63E-02 1.38E-03 3.14E-03 I-131 <7.06E-03 0.00E+00 7.06E-03 Cs-134 <5.64E-03 0.00E+00 5.64E-03 Cs-137 <5.58E-03 0.00E+00 5.58E-03 Be-7 1.96E-01 2.62E-02 4.23E-02 K-40 3.58E-01 5.74E-02 2.48E-02 Sample ID: 236198 Sample Dates: 5/14/2012 - 5/21/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.71E-02 1.48E-03 3.59E-03 I-131 <7.66E-03 0.00E+00 7.66E-03 Cs-134 <8.65E-03 0.00E+00 8.65E-03 Cs-137 <9.73E-03 0.00E+00 9.73E-03 Be-7 2.20E-01 2.93E-02 4.85E-02 K-40 <2.37E-01 0.00E+00 2.37E-01 Sample ID: 236511 Sample Dates: 5/21/2012 - 5/29/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.32E-02 1.36E-03 2.55E-03 I-131 <5.64E-03 0.00E+00 5.64E-03 Cs-134 <5.37E-03 0.00E+00 5.37E-03 Cs-137 <7.70E-03 0.00E+00 7.70E-03 Be-7 1.24E-01 2.86E-02 4.83E-02 K-40 2.01E-01 5.35E-02 8.44E-02 Sample ID: 236810 Sample Dates: 5/29/2012 - 6/4/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.55E-02 1.60E-03 3.98E-03 I-131 <8.81E-03 0.00E+00 8.81E-03 Cs-134 <8.67E-03 0.00E+00 8.67E-03 Cs-137 <1.08E-02 0.00E+00 1.08E-02 Be-7 1.25E-01 4.58E-02 8.50E-02 K-40 <2.28E-01 0.00E+00 2.28E-01 Sample ID: 237136 Sample Dates: 6/4/2012 - 6/11/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.83E-02 1.44E-03 3.23E-03 I-131 <1.52E-02 0.00E+00 1.52E-02 Cs-134 <1.79E-02 0.00E+00 1.79E-02 Cs-137 <1.88E-02 0.00E+00 1.88E-02 Be-7 1.73E-01 4.92E-02 1.31E-01 K-40 <3.96E-01 0.00E+00 3.96E-01 Sample ID: 237311 Sample Dates: 6/11/2012 - 6/18/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.42E-02 1.31E-03 3.07E-03 I-131 <7.01E-03 0.00E+00 7.01E-03 Cs-134 <7.80E-03 0.00E+00 7.80E-03 Cs-137 <8.34E-03 0.00E+00 8.34E-03 Be-7 1.60E-01 3.07E-02 4.67E-02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 31 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 237311 Sample Dates: 6/11/2012 - 6/18/2012 Nuclide Activity 1 Sigma Error LLD K-40 2.50E-01 5.64E-02 9.75E-02 Sample ID: 237987 Sample Dates: 6/18/2012 - 6/25/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.69E-02 1.57E-03 2.98E-03 I-131 <1.27E-02 0.00E+00 1.27E-02 Cs-134 <1.30E-02 0.00E+00 1.30E-02 Cs-137 <2.26E-02 0.00E+00 2.26E-02 Be-7 1.42E-01 5.45E-02 1.58E-01 K-40 <5.07E-01 0.00E+00 5.07E-01 Sample ID: 238739 Sample Dates: 6/25/2012 - 7/2/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.69E-02 1.70E-03 3.52E-03 I-131 <5.55E-03 0.00E+00 5.55E-03 Cs-134 <7.26E-03 0.00E+00 7.26E-03 Cs-137 <2.54E-03 0.00E+00 2.54E-03 Be-7 4.64E-02 1.59E-02 6.30E-02 K-40 <1.26E-01 0.00E+00 1.26E-01 Sample ID: 239116 Sample Dates: 7/2/2012 - 7/9/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.73E-02 1.63E-03 3.21E-03 I-131 <8.41E-03 0.00E+00 8.41E-03 Cs-134 <8.14E-03 0.00E+00 8.14E-03 Cs-137 <9.42E-03 0.00E+00 9.42E-03 Be-7 1.63E-01 3.28E-02 5.33E-02 K-40 <1.56E-01 0.00E+00 1.56E-01 Sample ID: 239888 Sample Dates: 7/9/2012 - 7/16/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.41E-02 1.30E-03 3.02E-03 I-131 <1.62E-02 0.00E+00 1.62E-02 Cs-134 <1.28E-02 0.00E+00 1.28E-02 Cs-137 <1.93E-02 0.00E+00 1.93E-02 Be-7 1.66E-01 4.15E-02 1.14E-01 K-40 <3.90E-01 0.00E+00 3.90E-01 Sample ID: 240012 Sample Dates: 7/16/2012 - 7/23/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.42E-02 1.36E-03 3.32E-03 I-131 <5.68E-03 0.00E+00 5.68E-03 Cs-134 <6.66E-03 0.00E+00 6.66E-03 Cs-137 <7.95E-03 0.00E+00 7.95E-03 Be-7 1.44E-01 3.52E-02 5.25E-02 K-40 <1.88E-01 0.00E+00 1.88E-01 Sample ID: 240334 Sample Dates: 7/23/2012 - 7/30/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.16E-02 1.52E-03 3.20E-03 I-131 <7.63E-03 0.00E+00 7.63E-03 Cs-134 <6.33E-03 0.00E+00 6.33E-03 Cs-137 <8.57E-03 0.00E+00 8.57E-03 Be-7 1.68E-01 4.25E-02 5.81E-02 K-40 <2.04E-01 0.00E+00 2.04E-01 Sample ID: 240969 Sample Dates: 7/30/2012 - 8/6/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.20E-02 1.49E-03 3.06E-03 I-131 <1.54E-02 0.00E+00 1.54E-02 Cs-134 <1.81E-02 0.00E+00 1.81E-02 Cs-137 <1.92E-02 0.00E+00 1.92E-02 Be-7 9.33E-02 4.75E-02 1.33E-01 K-40 <3.89E-01 0.00E+00 3.89E-01 Sample ID: 241240 Sample Dates: 8/6/2012 - 8/13/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.40E-02 1.33E-03 3.21E-03 I-131 <6.98E-03 0.00E+00 6.98E-03 Cs-134 <7.82E-03 0.00E+00 7.82E-03 Cs-137 <9.71E-03 0.00E+00 9.71E-03 Be-7 9.52E-02 2.85E-02 5.37E-02 K-40 3.14E-01 6.22E-02 8.85E-02 Sample ID: 241547 Sample Dates: 8/13/2012 - 8/20/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.56E-02 1.56E-03 3.09E-03 I-131 <6.81E-03 0.00E+00 6.81E-03 Cs-134 <4.78E-03 0.00E+00 4.78E-03 Cs-137 <7.22E-03 0.00E+00 7.22E-03 Be-7 1.91E-01 3.03E-02 5.45E-02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 32 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 241547 Sample Dates: 8/13/2012 - 8/20/2012 Nuclide Activity 1 Sigma Error LLD K-40 <2.14E-01 0.00E+00 2.14E-01 Sample ID: 242136 Sample Dates: 8/20/2012 - 8/27/2012 Nuclide Activity 1 Sigma Error LLD Beta 3.33E-02 1.80E-03 3.40E-03 I-131 <7.76E-03 0.00E+00 7.76E-03 Cs-134 <8.24E-03 0.00E+00 8.24E-03 Cs-137 <1.36E-02 0.00E+00 1.36E-02 Be-7 <1.40E-01 0.00E+00 1.40E-01 K-40 <2.26E-01 0.00E+00 2.26E-01 Sample ID: 242465 Sample Dates: 8/27/2012 - 9/4/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.26E-02 1.22E-03 3.02E-03 I-131 <5.18E-03 0.00E+00 5.18E-03 Cs-134 <7.45E-03 0.00E+00 7.45E-03 Cs-137 <9.28E-03 0.00E+00 9.28E-03 Be-7 1.12E-01 3.05E-02 6.73E-02 K-40 <2.31E-01 0.00E+00 2.31E-01 Sample ID: 242992 Sample Dates: 9/4/2012 - 9/10/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.59E-02 1.60E-03 3.96E-03 I-131 <2.12E-02 0.00E+00 2.12E-02 Cs-134 <1.17E-02 0.00E+00 1.17E-02 Cs-137 <9.44E-03 0.00E+00 9.44E-03 Be-7 <1.44E-01 0.00E+00 1.44E-01 K-40 <5.18E-01 0.00E+00 5.18E-01 Sample ID: 243750 Sample Dates: 9/10/2012 - 9/17/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.48E-02 1.61E-03 3.38E-03 I-131 <1.40E-03 0.00E+00 1.40E-03 Cs-134 <6.41E-03 0.00E+00 6.41E-03 Cs-137 <9.07E-03 0.00E+00 9.07E-03 Be-7 1.69E-01 3.96E-02 6.33E-02 K-40 <1.86E-01 0.00E+00 1.86E-01 Sample ID: 244155 Sample Dates: 9/17/2012 - 9/24/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.22E-02 1.51E-03 3.10E-03 I-131 <4.63E-03 0.00E+00 4.63E-03 Cs-134 <5.67E-03 0.00E+00 5.67E-03 Cs-137 <7.03E-03 0.00E+00 7.03E-03 Be-7 1.54E-01 3.73E-02 6.70E-02 K-40 <1.61E-01 0.00E+00 1.61E-01 Sample ID: 245026 Sample Dates: 9/24/2012 - 10/1/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.76E-02 1.66E-03 3.35E-03 I-131 <1.13E-02 0.00E+00 1.13E-02 Cs-134 <1.77E-02 0.00E+00 1.77E-02 Cs-137 <1.89E-02 0.00E+00 1.89E-02 Be-7 1.24E-01 6.56E-02 1.56E-01 K-40 <4.66E-01 0.00E+00 4.66E-01 Sample ID: 245846 Sample Dates: 10/1/2012 - 10/8/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.80E-02 1.66E-03 3.26E-03 I-131 <8.33E-03 0.00E+00 8.33E-03 Cs-134 <6.51E-03 0.00E+00 6.51E-03 Cs-137 <9.57E-03 0.00E+00 9.57E-03 Be-7 1.79E-01 2.88E-02 3.78E-02 K-40 <1.80E-01 0.00E+00 1.80E-01 Sample ID: 246701 Sample Dates: 10/8/2012 - 10/15/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.97E-02 1.67E-03 3.20E-03 I-131 <7.21E-03 0.00E+00 7.21E-03 Cs-134 <7.60E-03 0.00E+00 7.60E-03 Cs-137 <9.32E-03 0.00E+00 9.32E-03 Be-7 9.80E-02 3.22E-02 6.40E-02 K-40 <1.61E-01 0.00E+00 1.61E-01 Sample ID: 247109 Sample Dates: 10/15/2012 - 10/22/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.22E-02 1.60E-03 3.56E-03 I-131 <1.55E-02 0.00E+00 1.55E-02 Cs-134 <2.22E-02 0.00E+00 2.22E-02 Cs-137 <1.92E-02 0.00E+00 1.92E-02 Be-7 6.57E-02 4.74E-02 1.32E-01 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 33 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 247109 Sample Dates: 10/15/2012 - 10/22/2012 Nuclide Activity 1 Sigma Error LLD K-40 <3.19E-01 0.00E+00 3.19E-01 Sample ID: 247425 Sample Dates: 10/22/2012 - 10/29/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.92E-02 1.72E-03 3.53E-03 I-131 <1.55E-02 0.00E+00 1.55E-02 Cs-134 <2.05E-02 0.00E+00 2.05E-02 Cs-137 <1.37E-02 0.00E+00 1.37E-02 Be-7 <2.05E-01 0.00E+00 2.05E-01 K-40 <4.42E-01 0.00E+00 4.42E-01 Sample ID: 247763 Sample Dates: 10/29/2012 - 11/5/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.78E-02 1.66E-03 3.31E-03 I-131 <1.66E-02 0.00E+00 1.66E-02 Cs-134 <1.47E-02 0.00E+00 1.47E-02 Cs-137 <2.34E-02 0.00E+00 2.34E-02 Be-7 2.26E-01 5.52E-02 9.39E-02 K-40 <4.42E-01 0.00E+00 4.42E-01 Sample ID: 247958 Sample Dates: 11/5/2012 - 11/12/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.84E-02 1.66E-03 3.26E-03 I-131 <1.47E-02 0.00E+00 1.47E-02 Cs-134 <1.84E-02 0.00E+00 1.84E-02 Cs-137 <1.49E-02 0.00E+00 1.49E-02 Be-7 1.90E-01 5.08E-02 1.32E-01 K-40 <3.83E-01 0.00E+00 3.83E-01 Sample ID: 248362 Sample Dates: 11/12/2012 - 11/19/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.36E-02 1.74E-03 4.14E-03 I-131 <1.92E-02 0.00E+00 1.92E-02 Cs-134 <1.55E-02 0.00E+00 1.55E-02 Cs-137 <1.82E-02 0.00E+00 1.82E-02 Be-7 1.57E-01 5.89E-02 1.13E-01 K-40 <4.46E-01 0.00E+00 4.46E-01 Sample ID: 248641 Sample Dates: 11/19/2012 - 11/26/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.83E-02 1.69E-03 3.43E-03 I-131 <2.13E-02 0.00E+00 2.13E-02 Cs-134 <2.17E-02 0.00E+00 2.17E-02 Cs-137 <1.75E-02 0.00E+00 1.75E-02 Be-7 3.29E-01 5.82E-02 1.22E-01 K-40 <4.93E-01 0.00E+00 4.93E-01 Sample ID: 249014 Sample Dates: 11/26/2012 - 12/3/2012 Nuclide Activity 1 Sigma Error LLD Beta 3.60E-02 1.80E-03 3.22E-03 I-131 <1.58E-02 0.00E+00 1.58E-02 Cs-134 <1.97E-02 0.00E+00 1.97E-02 Cs-137 <2.58E-02 0.00E+00 2.58E-02 Be-7 1.53E-01 3.96E-02 8.64E-02 K-40 <5.53E-01 0.00E+00 5.53E-01 Sample ID: 249253 Sample Dates: 12/3/2012 - 12/10/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.75E-02 1.48E-03 3.56E-03 I-131 <1.85E-02 0.00E+00 1.85E-02 Cs-134 <1.64E-02 0.00E+00 1.64E-02 Cs-137 <2.10E-02 0.00E+00 2.10E-02 Be-7 <2.11E-01 0.00E+00 2.11E-01 K-40 <4.60E-01 0.00E+00 4.60E-01 Sample ID: 249451 Sample Dates: 12/10/2012 - 12/17/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.88E-02 1.71E-03 3.46E-03 I-131 <1.47E-02 0.00E+00 1.47E-02 Cs-134 <1.74E-02 0.00E+00 1.74E-02 Cs-137 <2.32E-02 0.00E+00 2.32E-02 Be-7 1.90E-01 5.69E-02 1.44E-01 K-40 <4.21E-01 0.00E+00 4.21E-01 Sample ID: 249878 Sample Dates: 12/17/2012 - 12/24/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.20E-02 1.51E-03 3.19E-03 I-131 <1.83E-02 0.00E+00 1.83E-02 Cs-134 <1.74E-02 0.00E+00 1.74E-02 Cs-137 <1.50E-02 0.00E+00 1.50E-02 Be-7 1.69E-01 6.48E-02 1.88E-01 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 34 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 249878 Sample Dates: 12/17/2012 - 12/24/2012 Nuclide Activity 1 Sigma Error LLD K-40 <3.86E-01 0.00E+00 3.86E-01 Sample ID: 250185 Sample Dates: 12/24/2012 - 12/31/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.46E-02 1.40E-03 3.47E-03 I-131 <1.57E-02 0.00E+00 1.57E-02 Cs-134 <2.18E-02 0.00E+00 2.18E-02 Cs-137 <2.13E-02 0.00E+00 2.13E-02 Be-7 1.25E-01 4.43E-02 1.50E-01 K-40 <5.04E-01 0.00E+00 5.04E-01 Sample Point 085 [ INDICATOR - NNW @ 0.88 miles ]

Sample ID: 227195 Sample Dates: 1/3/2012 - 1/9/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.54E-02 1.77E-03 3.73E-03 I-131 <2.69E-02 0.00E+00 2.69E-02 Cs-134 <2.38E-02 0.00E+00 2.38E-02 Cs-137 <2.25E-02 0.00E+00 2.25E-02 Be-7 2.16E-01 5.10E-02 1.28E-01 K-40 <5.32E-01 0.00E+00 5.32E-01 Sample ID: 227329 Sample Dates: 1/9/2012 - 1/16/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.18E-02 1.50E-03 3.09E-03 I-131 <7.78E-03 0.00E+00 7.78E-03 Cs-134 <7.31E-03 0.00E+00 7.31E-03 Cs-137 <8.76E-03 0.00E+00 8.76E-03 Be-7 1.29E-01 3.29E-02 7.12E-02 K-40 3.07E-01 6.32E-02 1.11E-01 Sample ID: 227543 Sample Dates: 1/16/2012 - 1/23/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.50E-02 1.58E-03 3.15E-03 I-131 <1.53E-02 0.00E+00 1.53E-02 Cs-134 <1.96E-02 0.00E+00 1.96E-02 Cs-137 <1.59E-02 0.00E+00 1.59E-02 Be-7 1.49E-01 5.53E-02 1.60E-01 K-40 <4.37E-01 0.00E+00 4.37E-01 Sample ID: 227865 Sample Dates: 1/23/2012 - 1/30/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.44E-02 1.41E-03 3.52E-03 I-131 <1.35E-02 0.00E+00 1.35E-02 Cs-134 <1.91E-02 0.00E+00 1.91E-02 Cs-137 <2.30E-02 0.00E+00 2.30E-02 Be-7 1.83E-01 6.46E-02 1.60E-01 K-40 <5.12E-01 0.00E+00 5.12E-01 Sample ID: 228132 Sample Dates: 1/30/2012 - 2/6/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.95E-02 1.49E-03 3.39E-03 I-131 <1.10E-02 0.00E+00 1.10E-02 Cs-134 <1.49E-02 0.00E+00 1.49E-02 Cs-137 <1.78E-02 0.00E+00 1.78E-02 Be-7 1.89E-01 8.15E-02 1.72E-01 K-40 <3.45E-01 0.00E+00 3.45E-01 Sample ID: 229443 Sample Dates: 2/6/2012 - 2/13/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.58E-02 1.64E-03 3.38E-03 I-131 <7.44E-03 0.00E+00 7.44E-03 Cs-134 <8.79E-03 0.00E+00 8.79E-03 Cs-137 <8.37E-03 0.00E+00 8.37E-03 Be-7 1.23E-01 3.19E-02 3.81E-02 K-40 <2.37E-01 0.00E+00 2.37E-01 Sample ID: 230069 Sample Dates: 2/13/2012 - 2/20/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.70E-02 1.38E-03 3.08E-03 I-131 <8.88E-03 0.00E+00 8.88E-03 Cs-134 <1.11E-02 0.00E+00 1.11E-02 Cs-137 <1.19E-02 0.00E+00 1.19E-02 Be-7 1.08E-01 2.86E-02 7.33E-02 K-40 1.21E-01 4.57E-02 4.67E-02 Sample ID: 230744 Sample Dates: 2/20/2012 - 2/27/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.68E-02 1.36E-03 3.01E-03 I-131 <1.64E-02 0.00E+00 1.64E-02 Cs-134 <1.68E-02 0.00E+00 1.68E-02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 35 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 230744 Sample Dates: 2/20/2012 - 2/27/2012 Nuclide Activity 1 Sigma Error LLD Cs-137 <1.29E-02 0.00E+00 1.29E-02 Be-7 <1.96E-01 0.00E+00 1.96E-01 K-40 <4.48E-01 0.00E+00 4.48E-01 Sample ID: 230953 Sample Dates: 2/27/2012 - 3/5/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.43E-02 1.40E-03 3.51E-03 I-131 <6.60E-03 0.00E+00 6.60E-03 Cs-134 <9.34E-03 0.00E+00 9.34E-03 Cs-137 <9.32E-03 0.00E+00 9.32E-03 Be-7 1.31E-01 3.16E-02 6.21E-02 K-40 <2.40E-01 0.00E+00 2.40E-01 Sample ID: 231663 Sample Dates: 3/5/2012 - 3/12/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.63E-02 1.44E-03 3.44E-03 I-131 <7.36E-03 0.00E+00 7.36E-03 Cs-134 <6.27E-03 0.00E+00 6.27E-03 Cs-137 <7.00E-03 0.00E+00 7.00E-03 Be-7 1.85E-01 2.99E-02 5.43E-02 K-40 2.99E-01 5.28E-02 7.87E-02 Sample ID: 232477 Sample Dates: 3/12/2012 - 3/19/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.42E-02 1.37E-03 3.36E-03 I-131 <6.40E-03 0.00E+00 6.40E-03 Cs-134 <7.36E-03 0.00E+00 7.36E-03 Cs-137 <7.99E-03 0.00E+00 7.99E-03 Be-7 1.08E-01 3.27E-02 5.06E-02 K-40 <1.40E-01 0.00E+00 1.40E-01 Sample ID: 233317 Sample Dates: 3/19/2012 - 3/26/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.63E-02 1.41E-03 3.33E-03 I-131 <1.96E-02 0.00E+00 1.96E-02 Cs-134 <2.34E-02 0.00E+00 2.34E-02 Cs-137 <1.52E-02 0.00E+00 1.52E-02 Be-7 2.34E-01 5.67E-02 1.13E-01 K-40 <4.67E-01 0.00E+00 4.67E-01 Sample ID: 233558 Sample Dates: 3/26/2012 - 4/2/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.91E-02 1.41E-03 3.00E-03 I-131 <8.17E-03 0.00E+00 8.17E-03 Cs-134 <1.02E-02 0.00E+00 1.02E-02 Cs-137 <1.01E-02 0.00E+00 1.01E-02 Be-7 1.84E-01 4.20E-02 5.51E-02 K-40 <2.38E-01 0.00E+00 2.38E-01 Sample ID: 234476 Sample Dates: 4/2/2012 - 4/9/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.61E-02 1.45E-03 3.52E-03 I-131 <1.40E-02 0.00E+00 1.40E-02 Cs-134 <1.51E-02 0.00E+00 1.51E-02 Cs-137 <1.81E-02 0.00E+00 1.81E-02 Be-7 1.86E-01 5.58E-02 1.26E-01 K-40 <3.66E-01 0.00E+00 3.66E-01 Sample ID: 234904 Sample Dates: 4/9/2012 - 4/16/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.73E-02 1.50E-03 3.63E-03 I-131 <5.95E-03 0.00E+00 5.95E-03 Cs-134 <6.93E-03 0.00E+00 6.93E-03 Cs-137 <6.75E-03 0.00E+00 6.75E-03 Be-7 1.60E-01 3.14E-02 5.63E-02 K-40 3.42E-01 6.59E-02 7.66E-02 Sample ID: 235226 Sample Dates: 4/16/2012 - 4/23/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.69E-02 1.38E-03 3.06E-03 I-131 <1.60E-02 0.00E+00 1.60E-02 Cs-134 <1.49E-02 0.00E+00 1.49E-02 Cs-137 <2.16E-02 0.00E+00 2.16E-02 Be-7 1.35E-01 6.17E-02 1.87E-01 K-40 <4.51E-01 0.00E+00 4.51E-01 Sample ID: 235411 Sample Dates: 4/23/2012 - 4/30/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.17E-02 1.53E-03 3.32E-03 I-131 <1.81E-02 0.00E+00 1.81E-02 Cs-134 <1.78E-02 0.00E+00 1.78E-02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 36 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 235411 Sample Dates: 4/23/2012 - 4/30/2012 Nuclide Activity 1 Sigma Error LLD Cs-137 <1.98E-02 0.00E+00 1.98E-02 Be-7 2.64E-01 5.19E-02 1.30E-01 K-40 <3.15E-01 0.00E+00 3.15E-01 Sample ID: 235749 Sample Dates: 4/30/2012 - 5/7/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.78E-02 1.45E-03 3.30E-03 I-131 <5.97E-03 0.00E+00 5.97E-03 Cs-134 <6.02E-03 0.00E+00 6.02E-03 Cs-137 <8.31E-03 0.00E+00 8.31E-03 Be-7 1.96E-01 2.68E-02 4.16E-02 K-40 3.98E-01 6.92E-02 9.66E-02 Sample ID: 235995 Sample Dates: 5/7/2012 - 5/14/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.67E-02 1.39E-03 3.13E-03 I-131 <1.69E-02 0.00E+00 1.69E-02 Cs-134 <1.61E-02 0.00E+00 1.61E-02 Cs-137 <2.12E-02 0.00E+00 2.12E-02 Be-7 2.74E-01 5.37E-02 1.55E-01 K-40 <4.97E-01 0.00E+00 4.97E-01 Sample ID: 236205 Sample Dates: 5/14/2012 - 5/21/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.69E-02 1.48E-03 3.60E-03 I-131 <2.06E-02 0.00E+00 2.06E-02 Cs-134 <1.90E-02 0.00E+00 1.90E-02 Cs-137 <2.40E-02 0.00E+00 2.40E-02 Be-7 2.20E-01 5.40E-02 8.83E-02 K-40 <3.58E-01 0.00E+00 3.58E-01 Sample ID: 236518 Sample Dates: 5/21/2012 - 5/29/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.39E-02 1.38E-03 2.55E-03 I-131 <1.64E-02 0.00E+00 1.64E-02 Cs-134 <1.37E-02 0.00E+00 1.37E-02 Cs-137 <1.51E-02 0.00E+00 1.51E-02 Be-7 1.78E-01 4.93E-02 1.16E-01 K-40 2.56E-01 8.11E-02 1.84E-01 Sample ID: 236817 Sample Dates: 5/29/2012 - 6/4/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.61E-02 1.61E-03 3.98E-03 I-131 <1.16E-02 0.00E+00 1.16E-02 Cs-134 <1.06E-02 0.00E+00 1.06E-02 Cs-137 <1.58E-02 0.00E+00 1.58E-02 Be-7 1.85E-01 5.06E-02 9.56E-02 K-40 1.86E-01 6.20E-02 5.58E-02 Sample ID: 237143 Sample Dates: 6/4/2012 - 6/11/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.67E-02 1.40E-03 3.23E-03 I-131 <1.58E-02 0.00E+00 1.58E-02 Cs-134 <1.99E-02 0.00E+00 1.99E-02 Cs-137 <1.88E-02 0.00E+00 1.88E-02 Be-7 1.75E-01 5.54E-02 1.70E-01 K-40 <3.18E-01 0.00E+00 3.18E-01 Sample ID: 237318 Sample Dates: 6/11/2012 - 6/18/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.57E-02 1.35E-03 3.08E-03 I-131 <1.94E-02 0.00E+00 1.94E-02 Cs-134 <1.72E-02 0.00E+00 1.72E-02 Cs-137 <1.71E-02 0.00E+00 1.71E-02 Be-7 <1.84E-01 0.00E+00 1.84E-01 K-40 <3.59E-01 0.00E+00 3.59E-01 Sample ID: 237994 Sample Dates: 6/18/2012 - 6/25/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.64E-02 1.56E-03 2.98E-03 I-131 <8.16E-03 0.00E+00 8.16E-03 Cs-134 <1.12E-02 0.00E+00 1.12E-02 Cs-137 <1.35E-02 0.00E+00 1.35E-02 Be-7 1.83E-01 3.94E-02 6.10E-02 K-40 1.85E-01 5.59E-02 4.55E-02 Sample ID: 238746 Sample Dates: 6/25/2012 - 7/2/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.84E-02 1.74E-03 3.55E-03 I-131 <7.20E-03 0.00E+00 7.20E-03 Cs-134 <6.40E-03 0.00E+00 6.40E-03 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 37 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 238746 Sample Dates: 6/25/2012 - 7/2/2012 Nuclide Activity 1 Sigma Error LLD Cs-137 <1.30E-02 0.00E+00 1.30E-02 Be-7 2.32E-01 3.85E-02 5.55E-02 K-40 <2.14E-01 0.00E+00 2.14E-01 Sample ID: 239123 Sample Dates: 7/2/2012 - 7/9/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.71E-02 1.63E-03 3.22E-03 I-131 <9.68E-03 0.00E+00 9.68E-03 Cs-134 <8.74E-03 0.00E+00 8.74E-03 Cs-137 <6.30E-03 0.00E+00 6.30E-03 Be-7 2.04E-01 4.87E-02 6.83E-02 K-40 <2.27E-01 0.00E+00 2.27E-01 Sample ID: 239895 Sample Dates: 7/9/2012 - 7/16/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.32E-02 1.28E-03 3.03E-03 I-131 <1.58E-02 0.00E+00 1.58E-02 Cs-134 <1.75E-02 0.00E+00 1.75E-02 Cs-137 <1.76E-02 0.00E+00 1.76E-02 Be-7 9.99E-02 5.96E-02 1.76E-01 K-40 <3.56E-01 0.00E+00 3.56E-01 Sample ID: 240019 Sample Dates: 7/16/2012 - 7/23/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.40E-02 1.35E-03 3.32E-03 I-131 <6.16E-03 0.00E+00 6.16E-03 Cs-134 <5.41E-03 0.00E+00 5.41E-03 Cs-137 <8.37E-03 0.00E+00 8.37E-03 Be-7 1.16E-01 3.00E-02 7.88E-02 K-40 2.39E-01 6.38E-02 4.61E-02 Sample ID: 240353 Sample Dates: 7/23/2012 - 7/30/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.41E-02 1.58E-03 3.21E-03 I-131 <5.94E-03 0.00E+00 5.94E-03 Cs-134 <9.98E-03 0.00E+00 9.98E-03 Cs-137 <9.97E-03 0.00E+00 9.97E-03 Be-7 1.32E-01 2.49E-02 4.91E-02 K-40 <2.08E-01 0.00E+00 2.08E-01 Sample ID: 240976 Sample Dates: 7/30/2012 - 8/6/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.26E-02 1.50E-03 3.05E-03 I-131 <1.49E-02 0.00E+00 1.49E-02 Cs-134 <1.51E-02 0.00E+00 1.51E-02 Cs-137 <1.71E-02 0.00E+00 1.71E-02 Be-7 1.06E-01 4.01E-02 1.34E-01 K-40 <4.45E-01 0.00E+00 4.45E-01 Sample ID: 241247 Sample Dates: 8/6/2012 - 8/13/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.45E-02 1.35E-03 3.22E-03 I-131 <1.55E-02 0.00E+00 1.55E-02 Cs-134 <2.03E-02 0.00E+00 2.03E-02 Cs-137 <2.28E-02 0.00E+00 2.28E-02 Be-7 2.36E-01 4.92E-02 1.43E-01 K-40 <3.18E-01 0.00E+00 3.18E-01 Sample ID: 241554 Sample Dates: 8/13/2012 - 8/20/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.74E-02 1.60E-03 3.10E-03 I-131 <8.69E-03 0.00E+00 8.69E-03 Cs-134 <8.54E-03 0.00E+00 8.54E-03 Cs-137 <8.34E-03 0.00E+00 8.34E-03 Be-7 1.28E-01 3.93E-02 5.16E-02 K-40 1.46E-01 5.16E-02 4.93E-02 Sample ID: 242143 Sample Dates: 8/20/2012 - 8/27/2012 Nuclide Activity 1 Sigma Error LLD Beta 3.53E-02 1.84E-03 3.40E-03 I-131 <1.80E-02 0.00E+00 1.80E-02 Cs-134 <1.86E-02 0.00E+00 1.86E-02 Cs-137 <2.17E-02 0.00E+00 2.17E-02 Be-7 2.64E-01 6.37E-02 1.45E-01 K-40 <4.42E-01 0.00E+00 4.42E-01 Sample ID: 242472 Sample Dates: 8/27/2012 - 9/4/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.33E-02 1.24E-03 3.04E-03 I-131 <1.98E-02 0.00E+00 1.98E-02 Cs-134 <1.54E-02 0.00E+00 1.54E-02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 38 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 242472 Sample Dates: 8/27/2012 - 9/4/2012 Nuclide Activity 1 Sigma Error LLD Cs-137 <1.71E-02 0.00E+00 1.71E-02 Be-7 <1.89E-01 0.00E+00 1.89E-01 K-40 <3.40E-01 0.00E+00 3.40E-01 Sample ID: 242999 Sample Dates: 9/4/2012 - 9/10/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.75E-02 1.63E-03 3.96E-03 I-131 <7.61E-03 0.00E+00 7.61E-03 Cs-134 <9.76E-03 0.00E+00 9.76E-03 Cs-137 <7.11E-03 0.00E+00 7.11E-03 Be-7 1.36E-01 3.24E-02 7.62E-02 K-40 <2.62E-01 0.00E+00 2.62E-01 Sample ID: 243757 Sample Dates: 9/10/2012 - 9/17/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.37E-02 1.58E-03 3.39E-03 I-131 <5.72E-03 0.00E+00 5.72E-03 Cs-134 <6.23E-03 0.00E+00 6.23E-03 Cs-137 <1.08E-02 0.00E+00 1.08E-02 Be-7 2.38E-01 3.97E-02 7.24E-02 K-40 <1.66E-01 0.00E+00 1.66E-01 Sample ID: 244162 Sample Dates: 9/17/2012 - 9/24/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.45E-02 1.56E-03 3.09E-03 I-131 <7.88E-03 0.00E+00 7.88E-03 Cs-134 <8.67E-03 0.00E+00 8.67E-03 Cs-137 <1.15E-02 0.00E+00 1.15E-02 Be-7 1.58E-01 4.06E-02 6.63E-02 K-40 1.85E-01 6.09E-02 9.85E-02 Sample ID: 245033 Sample Dates: 9/24/2012 - 10/1/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.91E-02 1.69E-03 3.34E-03 I-131 <1.52E-02 0.00E+00 1.52E-02 Cs-134 <2.10E-02 0.00E+00 2.10E-02 Cs-137 <2.16E-02 0.00E+00 2.16E-02 Be-7 2.34E-01 4.88E-02 1.48E-01 K-40 <3.65E-01 0.00E+00 3.65E-01 Sample ID: 245853 Sample Dates: 10/1/2012 - 10/8/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.67E-02 1.63E-03 3.26E-03 I-131 <8.25E-03 0.00E+00 8.25E-03 Cs-134 <1.00E-02 0.00E+00 1.00E-02 Cs-137 <1.19E-02 0.00E+00 1.19E-02 Be-7 1.82E-01 3.22E-02 5.75E-02 K-40 <2.73E-01 0.00E+00 2.73E-01 Sample ID: 246708 Sample Dates: 10/8/2012 - 10/15/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.98E-02 1.68E-03 3.22E-03 I-131 <2.26E-02 0.00E+00 2.26E-02 Cs-134 <1.74E-02 0.00E+00 1.74E-02 Cs-137 <2.57E-02 0.00E+00 2.57E-02 Be-7 <2.41E-01 0.00E+00 2.41E-01 K-40 <4.92E-01 0.00E+00 4.92E-01 Sample ID: 247116 Sample Dates: 10/15/2012 - 10/22/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.31E-02 1.61E-03 3.55E-03 I-131 <1.45E-02 0.00E+00 1.45E-02 Cs-134 <1.65E-02 0.00E+00 1.65E-02 Cs-137 <2.14E-02 0.00E+00 2.14E-02 Be-7 <1.68E-01 0.00E+00 1.68E-01 K-40 <2.77E-01 0.00E+00 2.77E-01 Sample ID: 247432 Sample Dates: 10/22/2012 - 10/29/2012 Nuclide Activity 1 Sigma Error LLD Beta 3.00E-02 1.75E-03 3.54E-03 I-131 <1.55E-02 0.00E+00 1.55E-02 Cs-134 <1.73E-02 0.00E+00 1.73E-02 Cs-137 <2.05E-02 0.00E+00 2.05E-02 Be-7 1.34E-01 3.71E-02 1.33E-01 K-40 <3.55E-01 0.00E+00 3.55E-01 Sample ID: 247770 Sample Dates: 10/29/2012 - 11/5/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.94E-02 1.70E-03 3.34E-03 I-131 <1.84E-02 0.00E+00 1.84E-02 Cs-134 <1.83E-02 0.00E+00 1.83E-02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 39 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 247770 Sample Dates: 10/29/2012 - 11/5/2012 Nuclide Activity 1 Sigma Error LLD Cs-137 <2.26E-02 0.00E+00 2.26E-02 Be-7 <2.05E-01 0.00E+00 2.05E-01 K-40 <4.69E-01 0.00E+00 4.69E-01 Sample ID: 247965 Sample Dates: 11/5/2012 - 11/12/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.78E-02 1.65E-03 3.28E-03 I-131 <2.00E-02 0.00E+00 2.00E-02 Cs-134 <2.19E-02 0.00E+00 2.19E-02 Cs-137 <2.02E-02 0.00E+00 2.02E-02 Be-7 1.23E-01 5.31E-02 1.11E-01 K-40 <4.66E-01 0.00E+00 4.66E-01 Sample ID: 248369 Sample Dates: 11/12/2012 - 11/19/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.40E-02 1.74E-03 4.13E-03 I-131 <1.84E-02 0.00E+00 1.84E-02 Cs-134 <2.19E-02 0.00E+00 2.19E-02 Cs-137 <1.75E-02 0.00E+00 1.75E-02 Be-7 <2.01E-01 0.00E+00 2.01E-01 K-40 <3.76E-01 0.00E+00 3.76E-01 Sample ID: 248648 Sample Dates: 11/19/2012 - 11/26/2012 Nuclide Activity 1 Sigma Error LLD Beta 3.09E-02 1.75E-03 3.44E-03 I-131 <1.70E-02 0.00E+00 1.70E-02 Cs-134 <2.18E-02 0.00E+00 2.18E-02 Cs-137 <2.25E-02 0.00E+00 2.25E-02 Be-7 <2.46E-01 0.00E+00 2.46E-01 K-40 <5.29E-01 0.00E+00 5.29E-01 Sample ID: 249021 Sample Dates: 11/26/2012 - 12/3/2012 Nuclide Activity 1 Sigma Error LLD Beta 3.63E-02 1.80E-03 3.22E-03 I-131 <2.24E-02 0.00E+00 2.24E-02 Cs-134 <1.89E-02 0.00E+00 1.89E-02 Cs-137 <1.55E-02 0.00E+00 1.55E-02 Be-7 2.74E-01 6.49E-02 1.20E-01 K-40 <5.11E-01 0.00E+00 5.11E-01 Sample ID: 249260 Sample Dates: 12/3/2012 - 12/10/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.87E-02 1.51E-03 3.56E-03 I-131 <1.37E-02 0.00E+00 1.37E-02 Cs-134 <2.15E-02 0.00E+00 2.15E-02 Cs-137 <1.73E-02 0.00E+00 1.73E-02 Be-7 <2.09E-01 0.00E+00 2.09E-01 K-40 <4.83E-01 0.00E+00 4.83E-01 Sample ID: 249458 Sample Dates: 12/10/2012 - 12/17/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.47E-02 1.63E-03 3.47E-03 I-131 <1.74E-02 0.00E+00 1.74E-02 Cs-134 <1.29E-02 0.00E+00 1.29E-02 Cs-137 <1.66E-02 0.00E+00 1.66E-02 Be-7 <1.78E-01 0.00E+00 1.78E-01 K-40 <4.22E-01 0.00E+00 4.22E-01 Sample ID: 249885 Sample Dates: 12/17/2012 - 12/24/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.47E-02 1.57E-03 3.19E-03 I-131 <1.99E-02 0.00E+00 1.99E-02 Cs-134 <1.58E-02 0.00E+00 1.58E-02 Cs-137 <2.07E-02 0.00E+00 2.07E-02 Be-7 <2.11E-01 0.00E+00 2.11E-01 K-40 <4.90E-01 0.00E+00 4.90E-01 Sample ID: 250192 Sample Dates: 12/24/2012 - 12/31/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.43E-02 1.40E-03 3.47E-03 I-131 <1.58E-02 0.00E+00 1.58E-02 Cs-134 <1.67E-02 0.00E+00 1.67E-02 Cs-137 <1.88E-02 0.00E+00 1.88E-02 Be-7 <1.97E-01 0.00E+00 1.97E-01 K-40 <4.56E-01 0.00E+00 4.56E-01 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 40 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 Sample Point 074 [ INDICATOR - NNW @ 2.36 miles ]

Sample ID: 227172 Sample Dates: 1/3/2012 - 1/9/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.38E-03 0.00E+00 9.38E-03 Cs-134 <1.04E-02 0.00E+00 1.04E-02 Cs-137 <1.06E-02 0.00E+00 1.06E-02 Be-7 2.89E-02 2.21E-02 6.14E-02 K-40 8.80E-01 1.10E-01 1.44E-01 Sample ID: 227306 Sample Dates: 1/9/2012 - 1/16/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.60E-03 0.00E+00 7.60E-03 Cs-134 <9.80E-03 0.00E+00 9.80E-03 Cs-137 <1.10E-02 0.00E+00 1.10E-02 Be-7 <7.81E-02 0.00E+00 7.81E-02 K-40 5.99E-01 9.03E-02 1.72E-01 Sample ID: 227520 Sample Dates: 1/16/2012 - 1/23/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.13E-03 0.00E+00 8.13E-03 Cs-134 <9.08E-03 0.00E+00 9.08E-03 Cs-137 <1.34E-02 0.00E+00 1.34E-02 Be-7 <6.76E-02 0.00E+00 6.76E-02 K-40 5.15E-01 1.02E-01 1.38E-01 Sample ID: 227842 Sample Dates: 1/23/2012 - 1/30/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.43E-03 0.00E+00 7.43E-03 Cs-134 <8.11E-03 0.00E+00 8.11E-03 Cs-137 <1.13E-02 0.00E+00 1.13E-02 Be-7 <7.83E-02 0.00E+00 7.83E-02 K-40 6.45E-01 1.08E-01 1.09E-01 Sample ID: 228109 Sample Dates: 1/30/2012 - 2/6/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.29E-02 0.00E+00 1.29E-02 Cs-134 <1.38E-02 0.00E+00 1.38E-02 Cs-137 <1.62E-02 0.00E+00 1.62E-02 Be-7 <9.44E-02 0.00E+00 9.44E-02 K-40 4.97E-01 1.06E-01 1.62E-01 Sample ID: 229420 Sample Dates: 2/6/2012 - 2/13/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.34E-03 0.00E+00 7.34E-03 Cs-134 <8.70E-03 0.00E+00 8.70E-03 Cs-137 <1.27E-02 0.00E+00 1.27E-02 Be-7 <1.18E-01 0.00E+00 1.18E-01 K-40 2.25E-01 1.05E-01 2.32E-01 Sample ID: 230046 Sample Dates: 2/13/2012 - 2/20/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.35E-02 0.00E+00 1.35E-02 Cs-134 <9.80E-03 0.00E+00 9.80E-03 Cs-137 <1.40E-02 0.00E+00 1.40E-02 Be-7 <1.40E-01 0.00E+00 1.40E-01 K-40 4.87E-01 1.06E-01 6.27E-02 Sample ID: 230721 Sample Dates: 2/20/2012 - 2/27/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.95E-03 0.00E+00 7.95E-03 Cs-134 <8.36E-03 0.00E+00 8.36E-03 Cs-137 <1.22E-02 0.00E+00 1.22E-02 Be-7 <7.96E-02 0.00E+00 7.96E-02 K-40 4.53E-01 1.08E-01 1.18E-01 Sample ID: 230930 Sample Dates: 2/27/2012 - 3/5/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.09E-03 0.00E+00 9.09E-03 Cs-134 <9.83E-03 0.00E+00 9.83E-03 Cs-137 <1.45E-02 0.00E+00 1.45E-02 Be-7 <6.70E-02 0.00E+00 6.70E-02 K-40 4.58E-01 9.75E-02 5.62E-02 Sample ID: 231640 Sample Dates: 3/5/2012 - 3/12/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.50E-02 0.00E+00 1.50E-02 Cs-134 <1.17E-02 0.00E+00 1.17E-02 Cs-137 <1.75E-02 0.00E+00 1.75E-02 Be-7 <9.38E-02 0.00E+00 9.38E-02 K-40 3.78E-01 9.45E-02 1.69E-01 Sample ID: 232454 Sample Dates: 3/12/2012 - 3/19/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.07E-02 0.00E+00 1.07E-02 Cs-134 <1.20E-02 0.00E+00 1.20E-02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 41 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 Sample Point 074 [ INDICATOR - NNW @ 2.36 miles ]

Sample ID: 232454 Sample Dates: 3/12/2012 - 3/19/2012 Nuclide Activity 1 Sigma Error LLD Cs-137 <1.07E-02 0.00E+00 1.07E-02 Be-7 <9.84E-02 0.00E+00 9.84E-02 K-40 4.29E-01 1.16E-01 1.49E-01 Sample ID: 233294 Sample Dates: 3/19/2012 - 3/26/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.64E-03 0.00E+00 8.64E-03 Cs-134 <1.14E-02 0.00E+00 1.14E-02 Cs-137 <1.34E-02 0.00E+00 1.34E-02 Be-7 <7.79E-02 0.00E+00 7.79E-02 K-40 5.13E-01 9.59E-02 1.16E-01 Sample ID: 233535 Sample Dates: 3/26/2012 - 4/2/2012 Nuclide Activity 1 Sigma Error LLD I-131 <6.82E-03 0.00E+00 6.82E-03 Cs-134 <1.32E-02 0.00E+00 1.32E-02 Cs-137 <1.78E-02 0.00E+00 1.78E-02 Be-7 <1.07E-01 0.00E+00 1.07E-01 K-40 3.81E-01 9.24E-02 2.03E-01 Sample ID: 234453 Sample Dates: 4/2/2012 - 4/9/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.28E-03 0.00E+00 9.28E-03 Cs-134 <1.08E-02 0.00E+00 1.08E-02 Cs-137 <1.05E-02 0.00E+00 1.05E-02 Be-7 <7.13E-02 0.00E+00 7.13E-02 K-40 5.78E-01 9.87E-02 1.10E-01 Sample ID: 234881 Sample Dates: 4/9/2012 - 4/16/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.23E-02 0.00E+00 1.23E-02 Cs-134 <1.74E-02 0.00E+00 1.74E-02 Cs-137 <1.76E-02 0.00E+00 1.76E-02 Be-7 <1.57E-01 0.00E+00 1.57E-01 K-40 2.19E-01 1.13E-01 2.43E-01 Sample ID: 235203 Sample Dates: 4/16/2012 - 4/23/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.47E-02 0.00E+00 1.47E-02 Cs-134 <1.54E-02 0.00E+00 1.54E-02 Cs-137 <2.00E-02 0.00E+00 2.00E-02 Be-7 <1.30E-01 0.00E+00 1.30E-01 K-40 <3.68E-01 0.00E+00 3.68E-01 Sample ID: 235388 Sample Dates: 4/23/2012 - 4/30/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.86E-03 0.00E+00 9.86E-03 Cs-134 <8.74E-03 0.00E+00 8.74E-03 Cs-137 <1.40E-02 0.00E+00 1.40E-02 Be-7 <7.43E-02 0.00E+00 7.43E-02 K-40 2.09E-01 6.30E-02 5.14E-02 Sample ID: 235726 Sample Dates: 4/30/2012 - 5/7/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.43E-03 0.00E+00 8.43E-03 Cs-134 <9.68E-03 0.00E+00 9.68E-03 Cs-137 <9.00E-03 0.00E+00 9.00E-03 Be-7 <7.40E-02 0.00E+00 7.40E-02 K-40 3.42E-01 6.36E-02 8.47E-02 Sample ID: 235972 Sample Dates: 5/7/2012 - 5/14/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.33E-02 0.00E+00 1.33E-02 Cs-134 <1.23E-02 0.00E+00 1.23E-02 Cs-137 <1.48E-02 0.00E+00 1.48E-02 Be-7 <6.70E-02 0.00E+00 6.70E-02 K-40 2.06E-01 1.18E-01 2.63E-01 Sample ID: 236182 Sample Dates: 5/14/2012 - 5/21/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.10E-02 0.00E+00 1.10E-02 Cs-134 <1.59E-02 0.00E+00 1.59E-02 Cs-137 <1.06E-02 0.00E+00 1.06E-02 Be-7 <9.73E-02 0.00E+00 9.73E-02 K-40 <4.82E-01 0.00E+00 4.82E-01 Sample ID: 236495 Sample Dates: 5/21/2012 - 5/29/2012 Nuclide Activity 1 Sigma Error LLD I-131 <6.86E-03 0.00E+00 6.86E-03 Cs-134 <2.46E-03 0.00E+00 2.46E-03 Cs-137 <1.24E-02 0.00E+00 1.24E-02 Be-7 <1.20E-01 0.00E+00 1.20E-01 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 42 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 Sample Point 074 [ INDICATOR - NNW @ 2.36 miles ]

Sample ID: 236495 Sample Dates: 5/21/2012 - 5/29/2012 Nuclide Activity 1 Sigma Error LLD K-40 3.12E-01 9.82E-02 5.39E-02 Sample ID: 236794 Sample Dates: 5/29/2012 - 6/4/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.46E-02 0.00E+00 1.46E-02 Cs-134 <1.16E-02 0.00E+00 1.16E-02 Cs-137 <2.21E-02 0.00E+00 2.21E-02 Be-7 <9.61E-02 0.00E+00 9.61E-02 K-40 4.01E-01 1.36E-01 1.99E-01 Sample ID: 237120 Sample Dates: 6/4/2012 - 6/11/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.10E-03 0.00E+00 9.10E-03 Cs-134 <1.40E-02 0.00E+00 1.40E-02 Cs-137 <1.42E-02 0.00E+00 1.42E-02 Be-7 <7.18E-02 0.00E+00 7.18E-02 K-40 3.80E-01 1.17E-01 2.34E-01 Sample ID: 237295 Sample Dates: 6/11/2012 - 6/18/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.28E-02 0.00E+00 1.28E-02 Cs-134 <1.24E-02 0.00E+00 1.24E-02 Cs-137 <2.17E-02 0.00E+00 2.17E-02 Be-7 <1.10E-01 0.00E+00 1.10E-01 K-40 5.06E-01 1.08E-01 6.22E-02 Sample ID: 237971 Sample Dates: 6/18/2012 - 6/25/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.03E-03 0.00E+00 8.03E-03 Cs-134 <9.66E-03 0.00E+00 9.66E-03 Cs-137 <1.03E-02 0.00E+00 1.03E-02 Be-7 <7.80E-02 0.00E+00 7.80E-02 K-40 6.66E-01 9.66E-02 1.05E-01 Sample ID: 238723 Sample Dates: 6/25/2012 - 7/2/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.21E-02 0.00E+00 1.21E-02 Cs-134 <7.75E-03 0.00E+00 7.75E-03 Cs-137 <1.35E-02 0.00E+00 1.35E-02 Be-7 <1.11E-01 0.00E+00 1.11E-01 K-40 3.04E-01 8.44E-02 1.98E-01 Sample ID: 239100 Sample Dates: 7/2/2012 - 7/9/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.27E-02 0.00E+00 1.27E-02 Cs-134 <1.90E-02 0.00E+00 1.90E-02 Cs-137 <1.35E-02 0.00E+00 1.35E-02 Be-7 <1.32E-01 0.00E+00 1.32E-01 K-40 <4.68E-01 0.00E+00 4.68E-01 Sample ID: 239872 Sample Dates: 7/9/2012 - 7/16/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.10E-02 0.00E+00 1.10E-02 Cs-134 <2.78E-03 0.00E+00 2.78E-03 Cs-137 <1.31E-02 0.00E+00 1.31E-02 Be-7 <8.89E-02 0.00E+00 8.89E-02 K-40 2.91E-01 1.02E-01 2.50E-01 Sample ID: 239996 Sample Dates: 7/16/2012 - 7/23/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.54E-02 0.00E+00 1.54E-02 Cs-134 <1.40E-02 0.00E+00 1.40E-02 Cs-137 <1.75E-02 0.00E+00 1.75E-02 Be-7 <1.10E-01 0.00E+00 1.10E-01 K-40 <4.31E-01 0.00E+00 4.31E-01 Sample ID: 240318 Sample Dates: 7/23/2012 - 7/30/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.34E-02 0.00E+00 1.34E-02 Cs-134 <1.17E-02 0.00E+00 1.17E-02 Cs-137 <1.43E-02 0.00E+00 1.43E-02 Be-7 <1.27E-01 0.00E+00 1.27E-01 K-40 5.66E-01 1.16E-01 1.78E-01 Sample ID: 240953 Sample Dates: 7/30/2012 - 8/6/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.29E-03 0.00E+00 9.29E-03 Cs-134 <1.02E-02 0.00E+00 1.02E-02 Cs-137 <8.43E-03 0.00E+00 8.43E-03 Be-7 <7.47E-02 0.00E+00 7.47E-02 K-40 3.90E-01 1.02E-01 1.50E-01 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 43 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

Media Type: AIR RADIOIODINE Concentration (Activity): pCi/m3 Sample Point 074 [ INDICATOR - NNW @ 2.36 miles ]

Sample ID: 241224 Sample Dates: 8/6/2012 - 8/13/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.07E-02 0.00E+00 1.07E-02 Cs-134 <1.34E-02 0.00E+00 1.34E-02 Cs-137 <1.52E-02 0.00E+00 1.52E-02 Be-7 <1.00E-01 0.00E+00 1.00E-01 K-40 2.86E-01 7.66E-02 5.53E-02 Sample ID: 241531 Sample Dates: 8/13/2012 - 8/20/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.02E-03 0.00E+00 7.02E-03 Cs-134 <6.87E-03 0.00E+00 6.87E-03 Cs-137 <9.55E-03 0.00E+00 9.55E-03 Be-7 <7.46E-02 0.00E+00 7.46E-02 K-40 6.70E-01 8.95E-02 1.09E-01 Sample ID: 242120 Sample Dates: 8/20/2012 - 8/27/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.59E-03 0.00E+00 7.59E-03 Cs-134 <9.83E-03 0.00E+00 9.83E-03 Cs-137 <1.20E-02 0.00E+00 1.20E-02 Be-7 <4.18E-02 0.00E+00 4.18E-02 K-40 4.90E-01 9.08E-02 1.15E-01 Sample ID: 242449 Sample Dates: 8/27/2012 - 9/4/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.01E-03 0.00E+00 8.01E-03 Cs-134 <7.79E-03 0.00E+00 7.79E-03 Cs-137 <9.26E-03 0.00E+00 9.26E-03 Be-7 <7.49E-02 0.00E+00 7.49E-02 K-40 4.40E-01 8.33E-02 1.12E-01 Sample ID: 242976 Sample Dates: 9/4/2012 - 9/10/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.77E-02 0.00E+00 1.77E-02 Cs-134 <1.51E-02 0.00E+00 1.51E-02 Cs-137 <1.85E-02 0.00E+00 1.85E-02 Be-7 <1.06E-01 0.00E+00 1.06E-01 K-40 3.73E-01 1.28E-01 7.31E-02 Sample ID: 243734 Sample Dates: 9/10/2012 - 9/17/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.63E-03 0.00E+00 9.63E-03 Cs-134 <9.36E-03 0.00E+00 9.36E-03 Cs-137 <1.90E-02 0.00E+00 1.90E-02 Be-7 <7.63E-02 0.00E+00 7.63E-02 K-40 <4.06E-01 0.00E+00 4.06E-01 Sample Point 077 [ INDICATOR - SW @ 1 miles ]

Sample ID: 227173 Sample Dates: 1/3/2012 - 1/9/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.14E-02 0.00E+00 1.14E-02 Cs-134 <1.50E-02 0.00E+00 1.50E-02 Cs-137 <3.84E-03 0.00E+00 3.84E-03 Be-7 <1.15E-01 0.00E+00 1.15E-01 K-40 4.51E-01 1.10E-01 2.05E-01 Sample ID: 227307 Sample Dates: 1/9/2012 - 1/16/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.85E-03 0.00E+00 8.85E-03 Cs-134 <6.90E-03 0.00E+00 6.90E-03 Cs-137 <1.24E-02 0.00E+00 1.24E-02 Be-7 <7.23E-02 0.00E+00 7.23E-02 K-40 <3.42E-01 0.00E+00 3.42E-01 Sample ID: 227521 Sample Dates: 1/16/2012 - 1/23/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.17E-02 0.00E+00 1.17E-02 Cs-134 <1.04E-02 0.00E+00 1.04E-02 Cs-137 <1.22E-02 0.00E+00 1.22E-02 Be-7 <8.66E-02 0.00E+00 8.66E-02 K-40 1.42E-01 1.02E-01 1.64E-01 Sample ID: 227843 Sample Dates: 1/23/2012 - 1/30/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.38E-03 0.00E+00 9.38E-03 Cs-134 <1.21E-02 0.00E+00 1.21E-02 Cs-137 <1.07E-02 0.00E+00 1.07E-02 Be-7 <8.00E-02 0.00E+00 8.00E-02 K-40 1.69E-01 8.44E-02 1.76E-01 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 44 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 228110 Sample Dates: 1/30/2012 - 2/6/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.29E-02 0.00E+00 1.29E-02 Cs-134 <1.06E-02 0.00E+00 1.06E-02 Cs-137 <1.89E-02 0.00E+00 1.89E-02 Be-7 <1.20E-01 0.00E+00 1.20E-01 K-40 <4.95E-01 0.00E+00 4.95E-01 Sample ID: 229421 Sample Dates: 2/6/2012 - 2/13/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.94E-03 0.00E+00 9.94E-03 Cs-134 <9.77E-03 0.00E+00 9.77E-03 Cs-137 <1.31E-02 0.00E+00 1.31E-02 Be-7 <6.38E-02 0.00E+00 6.38E-02 K-40 4.72E-01 7.98E-02 1.60E-01 Sample ID: 230047 Sample Dates: 2/13/2012 - 2/20/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.32E-02 0.00E+00 1.32E-02 Cs-134 <1.67E-02 0.00E+00 1.67E-02 Cs-137 <1.50E-02 0.00E+00 1.50E-02 Be-7 <1.18E-01 0.00E+00 1.18E-01 K-40 4.86E-01 1.06E-01 6.25E-02 Sample ID: 230722 Sample Dates: 2/20/2012 - 2/27/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.60E-03 0.00E+00 9.60E-03 Cs-134 <1.28E-02 0.00E+00 1.28E-02 Cs-137 <1.25E-02 0.00E+00 1.25E-02 Be-7 <8.19E-02 0.00E+00 8.19E-02 K-40 3.75E-01 1.06E-01 2.34E-01 Sample ID: 230931 Sample Dates: 2/27/2012 - 3/5/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.98E-03 0.00E+00 8.98E-03 Cs-134 <5.87E-03 0.00E+00 5.87E-03 Cs-137 <1.07E-02 0.00E+00 1.07E-02 Be-7 <6.93E-02 0.00E+00 6.93E-02 K-40 5.94E-01 8.67E-02 8.97E-02 Sample ID: 231641 Sample Dates: 3/5/2012 - 3/12/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.03E-02 0.00E+00 1.03E-02 Cs-134 <1.14E-02 0.00E+00 1.14E-02 Cs-137 <1.36E-02 0.00E+00 1.36E-02 Be-7 <9.29E-02 0.00E+00 9.29E-02 K-40 5.59E-01 1.14E-01 1.93E-01 Sample ID: 232455 Sample Dates: 3/12/2012 - 3/19/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.61E-03 0.00E+00 8.61E-03 Cs-134 <1.06E-02 0.00E+00 1.06E-02 Cs-137 <1.13E-02 0.00E+00 1.13E-02 Be-7 <9.23E-02 0.00E+00 9.23E-02 K-40 3.74E-01 8.13E-02 1.49E-01 Sample ID: 233295 Sample Dates: 3/19/2012 - 3/26/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.16E-02 0.00E+00 1.16E-02 Cs-134 <2.64E-03 0.00E+00 2.64E-03 Cs-137 <1.55E-02 0.00E+00 1.55E-02 Be-7 <6.79E-02 0.00E+00 6.79E-02 K-40 <3.67E-01 0.00E+00 3.67E-01 Sample ID: 233536 Sample Dates: 3/26/2012 - 4/2/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.10E-02 0.00E+00 1.10E-02 Cs-134 <1.20E-02 0.00E+00 1.20E-02 Cs-137 <1.09E-02 0.00E+00 1.09E-02 Be-7 <4.69E-02 0.00E+00 4.69E-02 K-40 3.04E-01 7.60E-02 1.62E-01 Sample ID: 234454 Sample Dates: 4/2/2012 - 4/9/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.15E-02 0.00E+00 1.15E-02 Cs-134 <1.02E-02 0.00E+00 1.02E-02 Cs-137 <1.31E-02 0.00E+00 1.31E-02 Be-7 <4.54E-02 0.00E+00 4.54E-02 K-40 3.41E-01 9.47E-02 1.89E-01 Sample ID: 234882 Sample Dates: 4/9/2012 - 4/16/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.11E-02 0.00E+00 1.11E-02 Cs-134 <1.41E-02 0.00E+00 1.41E-02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 45 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 234882 Sample Dates: 4/9/2012 - 4/16/2012 Nuclide Activity 1 Sigma Error LLD Cs-137 <1.65E-02 0.00E+00 1.65E-02 Be-7 <1.10E-01 0.00E+00 1.10E-01 K-40 2.92E-01 1.09E-01 2.54E-01 Sample ID: 235204 Sample Dates: 4/16/2012 - 4/23/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.40E-02 0.00E+00 1.40E-02 Cs-134 <1.49E-02 0.00E+00 1.49E-02 Cs-137 <1.72E-02 0.00E+00 1.72E-02 Be-7 <9.99E-02 0.00E+00 9.99E-02 K-40 3.02E-01 8.37E-02 2.10E-01 Sample ID: 235389 Sample Dates: 4/23/2012 - 4/30/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.04E-03 0.00E+00 9.04E-03 Cs-134 <7.47E-03 0.00E+00 7.47E-03 Cs-137 <1.30E-02 0.00E+00 1.30E-02 Be-7 <6.77E-02 0.00E+00 6.77E-02 K-40 3.69E-01 6.97E-02 1.86E-01 Sample ID: 235727 Sample Dates: 4/30/2012 - 5/7/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.71E-03 0.00E+00 8.71E-03 Cs-134 <1.06E-02 0.00E+00 1.06E-02 Cs-137 <1.20E-02 0.00E+00 1.20E-02 Be-7 <9.68E-02 0.00E+00 9.68E-02 K-40 1.98E-01 8.82E-02 1.82E-01 Sample ID: 235973 Sample Dates: 5/7/2012 - 5/14/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.10E-02 0.00E+00 1.10E-02 Cs-134 <1.19E-02 0.00E+00 1.19E-02 Cs-137 <1.35E-02 0.00E+00 1.35E-02 Be-7 <9.41E-02 0.00E+00 9.41E-02 K-40 <3.94E-01 0.00E+00 3.94E-01 Sample ID: 236183 Sample Dates: 5/14/2012 - 5/21/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.35E-03 0.00E+00 9.35E-03 Cs-134 <7.96E-03 0.00E+00 7.96E-03 Cs-137 <8.74E-03 0.00E+00 8.74E-03 Be-7 <4.98E-02 0.00E+00 4.98E-02 K-40 8.99E-01 1.03E-01 1.10E-01 Sample ID: 236496 Sample Dates: 5/21/2012 - 5/29/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.05E-03 0.00E+00 8.05E-03 Cs-134 <9.24E-03 0.00E+00 9.24E-03 Cs-137 <1.02E-02 0.00E+00 1.02E-02 Be-7 <5.10E-02 0.00E+00 5.10E-02 K-40 2.32E-01 8.16E-02 1.48E-01 Sample ID: 236795 Sample Dates: 5/29/2012 - 6/4/2012 Nuclide Activity 1 Sigma Error LLD I-131 <2.05E-02 0.00E+00 2.05E-02 Cs-134 <1.24E-02 0.00E+00 1.24E-02 Cs-137 <1.61E-02 0.00E+00 1.61E-02 Be-7 <1.03E-01 0.00E+00 1.03E-01 K-40 <4.83E-01 0.00E+00 4.83E-01 Sample ID: 237121 Sample Dates: 6/4/2012 - 6/11/2012 Nuclide Activity 1 Sigma Error LLD I-131 <6.34E-03 0.00E+00 6.34E-03 Cs-134 <1.09E-02 0.00E+00 1.09E-02 Cs-137 <1.64E-02 0.00E+00 1.64E-02 Be-7 <7.57E-02 0.00E+00 7.57E-02 K-40 2.50E-01 6.92E-02 1.79E-01 Sample ID: 237296 Sample Dates: 6/11/2012 - 6/18/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.67E-03 0.00E+00 7.67E-03 Cs-134 <2.37E-03 0.00E+00 2.37E-03 Cs-137 <1.47E-02 0.00E+00 1.47E-02 Be-7 <5.17E-02 0.00E+00 5.17E-02 K-40 3.07E-01 1.00E-01 1.67E-01 Sample ID: 237972 Sample Dates: 6/18/2012 - 6/25/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.02E-02 0.00E+00 1.02E-02 Cs-134 <1.17E-02 0.00E+00 1.17E-02 Cs-137 <1.45E-02 0.00E+00 1.45E-02 Be-7 <7.45E-02 0.00E+00 7.45E-02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 46 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 237972 Sample Dates: 6/18/2012 - 6/25/2012 Nuclide Activity 1 Sigma Error LLD K-40 3.15E-01 1.05E-01 1.48E-01 Sample ID: 238724 Sample Dates: 6/25/2012 - 7/2/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.53E-03 0.00E+00 7.53E-03 Cs-134 <1.30E-02 0.00E+00 1.30E-02 Cs-137 <1.36E-02 0.00E+00 1.36E-02 Be-7 <6.18E-02 0.00E+00 6.18E-02 K-40 3.28E-01 6.70E-02 1.49E-01 Sample ID: 239101 Sample Dates: 7/2/2012 - 7/9/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.08E-03 0.00E+00 7.08E-03 Cs-134 <7.57E-03 0.00E+00 7.57E-03 Cs-137 <1.17E-02 0.00E+00 1.17E-02 Be-7 <7.90E-02 0.00E+00 7.90E-02 K-40 6.29E-01 8.64E-02 8.51E-02 Sample ID: 239873 Sample Dates: 7/9/2012 - 7/16/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.84E-03 0.00E+00 8.84E-03 Cs-134 <7.77E-03 0.00E+00 7.77E-03 Cs-137 <1.31E-02 0.00E+00 1.31E-02 Be-7 <7.83E-02 0.00E+00 7.83E-02 K-40 6.58E-01 8.88E-02 1.09E-01 Sample ID: 239997 Sample Dates: 7/16/2012 - 7/23/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.30E-02 0.00E+00 1.30E-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 <1.10E-01 0.00E+00 1.10E-01 K-40 3.45E-01 1.05E-01 1.73E-01 Sample ID: 240319 Sample Dates: 7/23/2012 - 7/30/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.57E-03 0.00E+00 7.57E-03 Cs-134 <1.04E-02 0.00E+00 1.04E-02 Cs-137 <1.38E-02 0.00E+00 1.38E-02 Be-7 <7.12E-02 0.00E+00 7.12E-02 K-40 <3.36E-01 0.00E+00 3.36E-01 Sample ID: 240954 Sample Dates: 7/30/2012 - 8/6/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.01E-03 0.00E+00 8.01E-03 Cs-134 <1.20E-02 0.00E+00 1.20E-02 Cs-137 <8.39E-03 0.00E+00 8.39E-03 Be-7 <7.34E-02 0.00E+00 7.34E-02 K-40 4.39E-01 7.65E-02 1.22E-01 Sample ID: 241225 Sample Dates: 8/6/2012 - 8/13/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.54E-02 0.00E+00 1.54E-02 Cs-134 <1.38E-02 0.00E+00 1.38E-02 Cs-137 <1.66E-02 0.00E+00 1.66E-02 Be-7 <9.84E-02 0.00E+00 9.84E-02 K-40 3.70E-01 1.11E-01 6.25E-02 Sample ID: 241532 Sample Dates: 8/13/2012 - 8/20/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.98E-03 0.00E+00 8.98E-03 Cs-134 <9.81E-03 0.00E+00 9.81E-03 Cs-137 <1.35E-02 0.00E+00 1.35E-02 Be-7 <7.88E-02 0.00E+00 7.88E-02 K-40 3.60E-01 8.22E-02 1.52E-01 Sample ID: 242121 Sample Dates: 8/20/2012 - 8/27/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.15E-02 0.00E+00 1.15E-02 Cs-134 <1.17E-02 0.00E+00 1.17E-02 Cs-137 <1.32E-02 0.00E+00 1.32E-02 Be-7 <7.67E-02 0.00E+00 7.67E-02 K-40 4.76E-01 1.21E-01 1.54E-01 Sample ID: 242450 Sample Dates: 8/27/2012 - 9/4/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.26E-03 0.00E+00 8.26E-03 Cs-134 <9.84E-03 0.00E+00 9.84E-03 Cs-137 <1.38E-02 0.00E+00 1.38E-02 Be-7 <6.91E-02 0.00E+00 6.91E-02 K-40 2.77E-01 5.91E-02 1.12E-01 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 47 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 242977 Sample Dates: 9/4/2012 - 9/10/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.14E-02 0.00E+00 1.14E-02 Cs-134 <9.59E-03 0.00E+00 9.59E-03 Cs-137 <1.44E-02 0.00E+00 1.44E-02 Be-7 <7.54E-02 0.00E+00 7.54E-02 K-40 4.20E-01 1.02E-01 6.67E-02 Sample ID: 243735 Sample Dates: 9/10/2012 - 9/17/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.08E-03 0.00E+00 7.08E-03 Cs-134 <8.49E-03 0.00E+00 8.49E-03 Cs-137 <1.36E-02 0.00E+00 1.36E-02 Be-7 <8.19E-02 0.00E+00 8.19E-02 K-40 3.35E-01 1.14E-01 1.53E-01 Sample ID: 244140 Sample Dates: 9/17/2012 - 9/24/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.82E-02 0.00E+00 1.82E-02 Cs-134 <1.40E-02 0.00E+00 1.40E-02 Cs-137 <1.22E-02 0.00E+00 1.22E-02 Be-7 <1.13E-01 0.00E+00 1.13E-01 K-40 5.16E-01 1.10E-01 2.01E-01 Sample ID: 245012 Sample Dates: 9/24/2012 - 10/1/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.01E-02 0.00E+00 1.01E-02 Cs-134 <7.92E-03 0.00E+00 7.92E-03 Cs-137 <1.10E-02 0.00E+00 1.10E-02 Be-7 <9.42E-02 0.00E+00 9.42E-02 K-40 3.35E-01 8.38E-02 1.50E-01 Sample ID: 245832 Sample Dates: 10/1/2012 - 10/8/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.54E-03 0.00E+00 9.54E-03 Cs-134 <1.10E-02 0.00E+00 1.10E-02 Cs-137 <8.94E-03 0.00E+00 8.94E-03 Be-7 <7.96E-02 0.00E+00 7.96E-02 K-40 3.52E-01 8.81E-02 1.60E-01 Sample ID: 246687 Sample Dates: 10/8/2012 - 10/15/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.44E-02 0.00E+00 1.44E-02 Cs-134 <1.84E-02 0.00E+00 1.84E-02 Cs-137 <1.38E-02 0.00E+00 1.38E-02 Be-7 <1.31E-01 0.00E+00 1.31E-01 K-40 3.34E-01 1.11E-01 6.24E-02 Sample ID: 247095 Sample Dates: 10/15/2012 - 10/22/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.35E-03 0.00E+00 9.35E-03 Cs-134 <5.66E-03 0.00E+00 5.66E-03 Cs-137 <8.67E-03 0.00E+00 8.67E-03 Be-7 <7.48E-02 0.00E+00 7.48E-02 K-40 2.12E-01 6.70E-02 1.81E-01 Sample ID: 247411 Sample Dates: 10/22/2012 - 10/29/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.29E-03 0.00E+00 9.29E-03 Cs-134 <1.03E-02 0.00E+00 1.03E-02 Cs-137 <1.19E-02 0.00E+00 1.19E-02 Be-7 <8.46E-02 0.00E+00 8.46E-02 K-40 2.74E-01 7.60E-02 5.70E-02 Sample ID: 247749 Sample Dates: 10/29/2012 - 11/5/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.31E-03 0.00E+00 8.31E-03 Cs-134 <8.60E-03 0.00E+00 8.60E-03 Cs-137 <8.46E-03 0.00E+00 8.46E-03 Be-7 <8.47E-02 0.00E+00 8.47E-02 K-40 1.93E-01 9.01E-02 1.79E-01 Sample ID: 247944 Sample Dates: 11/5/2012 - 11/12/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.06E-03 0.00E+00 9.06E-03 Cs-134 <9.17E-03 0.00E+00 9.17E-03 Cs-137 <9.46E-03 0.00E+00 9.46E-03 Be-7 <7.97E-02 0.00E+00 7.97E-02 K-40 <3.79E-01 0.00E+00 3.79E-01 Sample ID: 248348 Sample Dates: 11/12/2012 - 11/19/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.01E-02 0.00E+00 1.01E-02 Cs-134 <8.81E-03 0.00E+00 8.81E-03 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 48 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 248348 Sample Dates: 11/12/2012 - 11/19/2012 Nuclide Activity 1 Sigma Error LLD Cs-137 <9.61E-03 0.00E+00 9.61E-03 Be-7 <5.75E-02 0.00E+00 5.75E-02 K-40 2.58E-01 1.04E-01 2.06E-01 Sample ID: 248627 Sample Dates: 11/19/2012 - 11/26/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.30E-02 0.00E+00 1.30E-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 <1.22E-01 0.00E+00 1.22E-01 K-40 4.86E-01 1.09E-01 6.57E-02 Sample ID: 249000 Sample Dates: 11/26/2012 - 12/3/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.45E-02 0.00E+00 1.45E-02 Cs-134 <1.59E-02 0.00E+00 1.59E-02 Cs-137 <1.56E-02 0.00E+00 1.56E-02 Be-7 <7.56E-02 0.00E+00 7.56E-02 K-40 <4.92E-01 0.00E+00 4.92E-01 Sample ID: 249239 Sample Dates: 12/3/2012 - 12/10/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.01E-02 0.00E+00 1.01E-02 Cs-134 <1.50E-02 0.00E+00 1.50E-02 Cs-137 <1.38E-02 0.00E+00 1.38E-02 Be-7 <1.07E-01 0.00E+00 1.07E-01 K-40 4.04E-01 9.79E-02 6.42E-02 Sample ID: 249437 Sample Dates: 12/10/2012 - 12/17/2012 Nuclide Activity 1 Sigma Error LLD I-131 <6.62E-03 0.00E+00 6.62E-03 Cs-134 <8.39E-03 0.00E+00 8.39E-03 Cs-137 <9.70E-03 0.00E+00 9.70E-03 Be-7 <6.79E-02 0.00E+00 6.79E-02 K-40 2.78E-01 7.72E-02 5.79E-02 Sample ID: 249864 Sample Dates: 12/17/2012 - 12/24/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.44E-02 0.00E+00 1.44E-02 Cs-134 <1.50E-02 0.00E+00 1.50E-02 Cs-137 <1.21E-02 0.00E+00 1.21E-02 Be-7 <9.02E-02 0.00E+00 9.02E-02 K-40 3.37E-01 1.23E-01 2.35E-01 Sample ID: 250171 Sample Dates: 12/24/2012 - 12/31/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.40E-03 0.00E+00 9.40E-03 Cs-134 <7.72E-03 0.00E+00 7.72E-03 Cs-137 <1.20E-02 0.00E+00 1.20E-02 Be-7 <8.52E-02 0.00E+00 8.52E-02 K-40 4.03E-01 7.49E-02 3.76E-02 Sample Point 078.1 [ INDICATOR - WSW @ 0.53 miles ]

Sample ID: 227177 Sample Dates: 1/3/2012 - 1/9/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.12E-02 0.00E+00 1.12E-02 Cs-134 <1.31E-02 0.00E+00 1.31E-02 Cs-137 <1.56E-02 0.00E+00 1.56E-02 Be-7 <1.11E-01 0.00E+00 1.11E-01 K-40 4.02E-01 9.48E-02 6.04E-02 Sample ID: 227311 Sample Dates: 1/9/2012 - 1/16/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.35E-03 0.00E+00 9.35E-03 Cs-134 <1.14E-02 0.00E+00 1.14E-02 Cs-137 <1.24E-02 0.00E+00 1.24E-02 Be-7 <6.41E-02 0.00E+00 6.41E-02 K-40 2.92E-01 7.53E-02 1.64E-01 Sample ID: 227525 Sample Dates: 1/16/2012 - 1/23/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.42E-03 0.00E+00 9.42E-03 Cs-134 <1.47E-02 0.00E+00 1.47E-02 Cs-137 <1.64E-02 0.00E+00 1.64E-02 Be-7 <8.23E-02 0.00E+00 8.23E-02 K-40 4.66E-01 9.92E-02 1.54E-01 Sample ID: 227847 Sample Dates: 1/23/2012 - 1/30/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.13E-02 0.00E+00 1.13E-02 Cs-134 <1.31E-02 0.00E+00 1.31E-02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 49 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 227847 Sample Dates: 1/23/2012 - 1/30/2012 Nuclide Activity 1 Sigma Error LLD Cs-137 <9.19E-03 0.00E+00 9.19E-03 Be-7 <1.04E-01 0.00E+00 1.04E-01 K-40 4.62E-01 1.03E-01 1.66E-01 Sample ID: 228114 Sample Dates: 1/30/2012 - 2/6/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.23E-02 0.00E+00 1.23E-02 Cs-134 <1.54E-02 0.00E+00 1.54E-02 Cs-137 <1.25E-02 0.00E+00 1.25E-02 Be-7 <1.15E-01 0.00E+00 1.15E-01 K-40 3.79E-01 1.07E-01 2.00E-01 Sample ID: 229425 Sample Dates: 2/6/2012 - 2/13/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.77E-03 0.00E+00 7.77E-03 Cs-134 <9.08E-03 0.00E+00 9.08E-03 Cs-137 <1.54E-02 0.00E+00 1.54E-02 Be-7 <8.70E-02 0.00E+00 8.70E-02 K-40 5.17E-01 8.38E-02 9.91E-02 Sample ID: 230051 Sample Dates: 2/13/2012 - 2/20/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.39E-02 0.00E+00 1.39E-02 Cs-134 <1.03E-02 0.00E+00 1.03E-02 Cs-137 <1.47E-02 0.00E+00 1.47E-02 Be-7 <9.48E-02 0.00E+00 9.48E-02 K-40 4.56E-01 1.02E-01 2.05E-01 Sample ID: 230726 Sample Dates: 2/20/2012 - 2/27/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.99E-03 0.00E+00 7.99E-03 Cs-134 <7.60E-03 0.00E+00 7.60E-03 Cs-137 <1.04E-02 0.00E+00 1.04E-02 Be-7 <6.72E-02 0.00E+00 6.72E-02 K-40 5.02E-01 8.04E-02 3.48E-02 Sample ID: 230935 Sample Dates: 2/27/2012 - 3/5/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.98E-03 0.00E+00 8.98E-03 Cs-134 <8.76E-03 0.00E+00 8.76E-03 Cs-137 <1.38E-02 0.00E+00 1.38E-02 Be-7 <6.57E-02 0.00E+00 6.57E-02 K-40 2.90E-01 8.03E-02 1.45E-01 Sample ID: 231645 Sample Dates: 3/5/2012 - 3/12/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.01E-03 0.00E+00 8.01E-03 Cs-134 <1.25E-02 0.00E+00 1.25E-02 Cs-137 <1.38E-02 0.00E+00 1.38E-02 Be-7 <6.72E-02 0.00E+00 6.72E-02 K-40 4.16E-01 1.11E-01 1.47E-01 Sample ID: 232459 Sample Dates: 3/12/2012 - 3/19/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.58E-03 0.00E+00 8.58E-03 Cs-134 <1.05E-02 0.00E+00 1.05E-02 Cs-137 <9.01E-03 0.00E+00 9.01E-03 Be-7 <5.59E-02 0.00E+00 5.59E-02 K-40 4.50E-01 9.34E-02 1.45E-01 Sample ID: 233299 Sample Dates: 3/19/2012 - 3/26/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.12E-02 0.00E+00 1.12E-02 Cs-134 <9.61E-03 0.00E+00 9.61E-03 Cs-137 <8.97E-03 0.00E+00 8.97E-03 Be-7 <9.21E-02 0.00E+00 9.21E-02 K-40 5.18E-01 8.30E-02 1.26E-01 Sample ID: 233540 Sample Dates: 3/26/2012 - 4/2/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.77E-03 0.00E+00 8.77E-03 Cs-134 <9.98E-03 0.00E+00 9.98E-03 Cs-137 <1.19E-02 0.00E+00 1.19E-02 Be-7 <6.58E-02 0.00E+00 6.58E-02 K-40 4.19E-01 7.40E-02 1.42E-01 Sample ID: 234458 Sample Dates: 4/2/2012 - 4/9/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.29E-03 0.00E+00 8.29E-03 Cs-134 <1.08E-02 0.00E+00 1.08E-02 Cs-137 <5.91E-03 0.00E+00 5.91E-03 Be-7 <5.53E-02 0.00E+00 5.53E-02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 50 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 234458 Sample Dates: 4/2/2012 - 4/9/2012 Nuclide Activity 1 Sigma Error LLD K-40 <4.21E-01 0.00E+00 4.21E-01 Sample ID: 234886 Sample Dates: 4/9/2012 - 4/16/2012 Nuclide Activity 1 Sigma Error LLD I-131 <5.93E-03 0.00E+00 5.93E-03 Cs-134 <1.37E-02 0.00E+00 1.37E-02 Cs-137 <1.81E-02 0.00E+00 1.81E-02 Be-7 <7.91E-02 0.00E+00 7.91E-02 K-40 4.10E-01 9.67E-02 1.63E-01 Sample ID: 235208 Sample Dates: 4/16/2012 - 4/23/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.90E-03 0.00E+00 7.90E-03 Cs-134 <8.34E-03 0.00E+00 8.34E-03 Cs-137 <1.08E-02 0.00E+00 1.08E-02 Be-7 <7.12E-02 0.00E+00 7.12E-02 K-40 4.01E-01 7.32E-02 1.23E-01 Sample ID: 235393 Sample Dates: 4/23/2012 - 4/30/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.28E-03 0.00E+00 7.28E-03 Cs-134 <1.06E-02 0.00E+00 1.06E-02 Cs-137 <1.20E-02 0.00E+00 1.20E-02 Be-7 <7.72E-02 0.00E+00 7.72E-02 K-40 5.38E-01 9.69E-02 9.08E-02 Sample ID: 235731 Sample Dates: 4/30/2012 - 5/7/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.40E-03 0.00E+00 7.40E-03 Cs-134 <8.46E-03 0.00E+00 8.46E-03 Cs-137 <1.29E-02 0.00E+00 1.29E-02 Be-7 <6.69E-02 0.00E+00 6.69E-02 K-40 4.32E-01 9.18E-02 1.24E-01 Sample ID: 235977 Sample Dates: 5/7/2012 - 5/14/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.45E-03 0.00E+00 9.45E-03 Cs-134 <1.11E-02 0.00E+00 1.11E-02 Cs-137 <1.36E-02 0.00E+00 1.36E-02 Be-7 <7.23E-02 0.00E+00 7.23E-02 K-40 6.17E-01 1.14E-01 2.02E-01 Sample ID: 236187 Sample Dates: 5/14/2012 - 5/21/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.33E-03 0.00E+00 9.33E-03 Cs-134 <9.26E-03 0.00E+00 9.26E-03 Cs-137 <1.20E-02 0.00E+00 1.20E-02 Be-7 <5.96E-02 0.00E+00 5.96E-02 K-40 4.10E-01 8.59E-02 1.09E-01 Sample ID: 236500 Sample Dates: 5/21/2012 - 5/29/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.80E-03 0.00E+00 9.80E-03 Cs-134 <8.24E-03 0.00E+00 8.24E-03 Cs-137 <1.81E-02 0.00E+00 1.81E-02 Be-7 <8.09E-02 0.00E+00 8.09E-02 K-40 2.54E-01 9.08E-02 2.12E-01 Sample ID: 236799 Sample Dates: 5/29/2012 - 6/4/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.53E-03 0.00E+00 8.53E-03 Cs-134 <1.09E-02 0.00E+00 1.09E-02 Cs-137 <8.80E-03 0.00E+00 8.80E-03 Be-7 <6.64E-02 0.00E+00 6.64E-02 K-40 5.52E-01 8.84E-02 1.20E-01 Sample ID: 237125 Sample Dates: 6/4/2012 - 6/11/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.84E-03 0.00E+00 7.84E-03 Cs-134 <7.57E-03 0.00E+00 7.57E-03 Cs-137 <1.11E-02 0.00E+00 1.11E-02 Be-7 <6.30E-02 0.00E+00 6.30E-02 K-40 <4.14E-01 0.00E+00 4.14E-01 Sample ID: 237300 Sample Dates: 6/11/2012 - 6/18/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.03E-03 0.00E+00 8.03E-03 Cs-134 <1.04E-02 0.00E+00 1.04E-02 Cs-137 <1.32E-02 0.00E+00 1.32E-02 Be-7 <7.58E-02 0.00E+00 7.58E-02 K-40 3.35E-01 6.70E-02 9.86E-02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 51 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 237976 Sample Dates: 6/18/2012 - 6/25/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.14E-03 0.00E+00 7.14E-03 Cs-134 <8.85E-03 0.00E+00 8.85E-03 Cs-137 <1.30E-02 0.00E+00 1.30E-02 Be-7 <1.89E-02 0.00E+00 1.89E-02 K-40 3.59E-01 8.24E-02 5.11E-02 Sample ID: 238728 Sample Dates: 6/25/2012 - 7/2/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.50E-02 0.00E+00 1.50E-02 Cs-134 <1.62E-02 0.00E+00 1.62E-02 Cs-137 <1.73E-02 0.00E+00 1.73E-02 Be-7 <8.67E-02 0.00E+00 8.67E-02 K-40 3.48E-01 1.11E-01 6.40E-02 Sample ID: 239105 Sample Dates: 7/2/2012 - 7/9/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.30E-03 0.00E+00 8.30E-03 Cs-134 <1.21E-02 0.00E+00 1.21E-02 Cs-137 <1.38E-02 0.00E+00 1.38E-02 Be-7 <7.12E-02 0.00E+00 7.12E-02 K-40 1.28E-01 8.10E-02 9.86E-02 Sample ID: 239877 Sample Dates: 7/9/2012 - 7/16/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.04E-02 0.00E+00 1.04E-02 Cs-134 <8.84E-03 0.00E+00 8.84E-03 Cs-137 <1.42E-02 0.00E+00 1.42E-02 Be-7 <9.53E-02 0.00E+00 9.53E-02 K-40 3.25E-01 7.69E-02 1.76E-01 Sample ID: 240001 Sample Dates: 7/16/2012 - 7/23/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.32E-02 0.00E+00 1.32E-02 Cs-134 <1.29E-02 0.00E+00 1.29E-02 Cs-137 <1.48E-02 0.00E+00 1.48E-02 Be-7 <8.21E-02 0.00E+00 8.21E-02 K-40 <4.41E-01 0.00E+00 4.41E-01 Sample ID: 240323 Sample Dates: 7/23/2012 - 7/30/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.32E-03 0.00E+00 8.32E-03 Cs-134 <1.07E-02 0.00E+00 1.07E-02 Cs-137 <1.12E-02 0.00E+00 1.12E-02 Be-7 <5.91E-02 0.00E+00 5.91E-02 K-40 4.88E-01 8.13E-02 1.02E-01 Sample ID: 240958 Sample Dates: 7/30/2012 - 8/6/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.91E-03 0.00E+00 9.91E-03 Cs-134 <1.17E-02 0.00E+00 1.17E-02 Cs-137 <1.17E-02 0.00E+00 1.17E-02 Be-7 <9.24E-02 0.00E+00 9.24E-02 K-40 3.59E-01 9.14E-02 1.58E-01 Sample ID: 241229 Sample Dates: 8/6/2012 - 8/13/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.69E-03 0.00E+00 7.69E-03 Cs-134 <1.15E-02 0.00E+00 1.15E-02 Cs-137 <1.11E-02 0.00E+00 1.11E-02 Be-7 <5.20E-02 0.00E+00 5.20E-02 K-40 4.98E-01 8.30E-02 1.01E-01 Sample ID: 241536 Sample Dates: 8/13/2012 - 8/20/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.67E-03 0.00E+00 7.67E-03 Cs-134 <1.12E-02 0.00E+00 1.12E-02 Cs-137 <1.05E-02 0.00E+00 1.05E-02 Be-7 <5.09E-02 0.00E+00 5.09E-02 K-40 5.22E-01 9.28E-02 9.72E-02 Sample ID: 242125 Sample Dates: 8/20/2012 - 8/27/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.34E-03 0.00E+00 7.34E-03 Cs-134 <1.22E-02 0.00E+00 1.22E-02 Cs-137 <1.84E-02 0.00E+00 1.84E-02 Be-7 <8.20E-02 0.00E+00 8.20E-02 K-40 <3.80E-01 0.00E+00 3.80E-01 Sample ID: 242454 Sample Dates: 8/27/2012 - 9/4/2012 Nuclide Activity 1 Sigma Error LLD I-131 <6.35E-03 0.00E+00 6.35E-03 Cs-134 <1.05E-02 0.00E+00 1.05E-02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 52 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 242454 Sample Dates: 8/27/2012 - 9/4/2012 Nuclide Activity 1 Sigma Error LLD Cs-137 <7.74E-03 0.00E+00 7.74E-03 Be-7 <7.06E-02 0.00E+00 7.06E-02 K-40 <3.52E-01 0.00E+00 3.52E-01 Sample ID: 242981 Sample Dates: 9/4/2012 - 9/10/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.02E-03 0.00E+00 7.02E-03 Cs-134 <1.63E-02 0.00E+00 1.63E-02 Cs-137 <2.05E-02 0.00E+00 2.05E-02 Be-7 <7.05E-02 0.00E+00 7.05E-02 K-40 3.60E-01 9.61E-02 6.94E-02 Sample ID: 243739 Sample Dates: 9/10/2012 - 9/17/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.60E-03 0.00E+00 7.60E-03 Cs-134 <9.52E-03 0.00E+00 9.52E-03 Cs-137 <1.17E-02 0.00E+00 1.17E-02 Be-7 <6.23E-02 0.00E+00 6.23E-02 K-40 4.78E-01 8.09E-02 9.98E-02 Sample ID: 244144 Sample Dates: 9/17/2012 - 9/24/2012 Nuclide Activity 1 Sigma Error LLD I-131 <5.63E-03 0.00E+00 5.63E-03 Cs-134 <9.03E-03 0.00E+00 9.03E-03 Cs-137 <9.11E-03 0.00E+00 9.11E-03 Be-7 <7.30E-02 0.00E+00 7.30E-02 K-40 3.63E-01 8.80E-02 5.77E-02 Sample ID: 245016 Sample Dates: 9/24/2012 - 10/1/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.20E-02 0.00E+00 1.20E-02 Cs-134 <1.42E-02 0.00E+00 1.42E-02 Cs-137 <1.25E-02 0.00E+00 1.25E-02 Be-7 <9.87E-02 0.00E+00 9.87E-02 K-40 3.10E-01 8.61E-02 2.09E-01 Sample ID: 245836 Sample Dates: 10/1/2012 - 10/8/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.02E-02 0.00E+00 1.02E-02 Cs-134 <9.58E-03 0.00E+00 9.58E-03 Cs-137 <2.81E-03 0.00E+00 2.81E-03 Be-7 <7.94E-02 0.00E+00 7.94E-02 K-40 2.56E-01 7.40E-02 5.77E-02 Sample ID: 246691 Sample Dates: 10/8/2012 - 10/15/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.07E-03 0.00E+00 8.07E-03 Cs-134 <1.02E-02 0.00E+00 1.02E-02 Cs-137 <9.06E-03 0.00E+00 9.06E-03 Be-7 <5.83E-02 0.00E+00 5.83E-02 K-40 3.72E-01 1.07E-01 2.39E-01 Sample ID: 247099 Sample Dates: 10/15/2012 - 10/22/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.17E-03 0.00E+00 7.17E-03 Cs-134 <1.17E-02 0.00E+00 1.17E-02 Cs-137 <1.32E-02 0.00E+00 1.32E-02 Be-7 <5.36E-02 0.00E+00 5.36E-02 K-40 3.18E-01 8.21E-02 5.73E-02 Sample ID: 247415 Sample Dates: 10/22/2012 - 10/29/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.44E-02 0.00E+00 1.44E-02 Cs-134 <1.52E-02 0.00E+00 1.52E-02 Cs-137 <1.28E-02 0.00E+00 1.28E-02 Be-7 <1.12E-01 0.00E+00 1.12E-01 K-40 4.63E-01 1.04E-01 1.67E-01 Sample ID: 247753 Sample Dates: 10/29/2012 - 11/5/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.10E-03 0.00E+00 7.10E-03 Cs-134 <8.98E-03 0.00E+00 8.98E-03 Cs-137 <9.66E-03 0.00E+00 9.66E-03 Be-7 <6.81E-02 0.00E+00 6.81E-02 K-40 3.72E-01 8.64E-02 1.26E-01 Sample ID: 247948 Sample Dates: 11/5/2012 - 11/12/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.06E-02 0.00E+00 1.06E-02 Cs-134 <1.27E-02 0.00E+00 1.27E-02 Cs-137 <1.06E-02 0.00E+00 1.06E-02 Be-7 <6.23E-02 0.00E+00 6.23E-02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 53 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 247948 Sample Dates: 11/5/2012 - 11/12/2012 Nuclide Activity 1 Sigma Error LLD K-40 4.06E-01 9.07E-02 5.48E-02 Sample ID: 248352 Sample Dates: 11/12/2012 - 11/19/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.31E-03 0.00E+00 8.31E-03 Cs-134 <1.01E-02 0.00E+00 1.01E-02 Cs-137 <1.26E-02 0.00E+00 1.26E-02 Be-7 <7.76E-02 0.00E+00 7.76E-02 K-40 1.90E-01 7.49E-02 3.90E-02 Sample ID: 248631 Sample Dates: 11/19/2012 - 11/26/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.50E-03 0.00E+00 7.50E-03 Cs-134 <9.39E-03 0.00E+00 9.39E-03 Cs-137 <8.01E-03 0.00E+00 8.01E-03 Be-7 <6.32E-02 0.00E+00 6.32E-02 K-40 2.74E-01 9.99E-02 1.86E-01 Sample ID: 249004 Sample Dates: 11/26/2012 - 12/3/2012 Nuclide Activity 1 Sigma Error LLD I-131 <6.58E-03 0.00E+00 6.58E-03 Cs-134 <6.28E-03 0.00E+00 6.28E-03 Cs-137 <7.81E-03 0.00E+00 7.81E-03 Be-7 <4.62E-02 0.00E+00 4.62E-02 K-40 2.93E-01 7.84E-02 5.66E-02 Sample ID: 249243 Sample Dates: 12/3/2012 - 12/10/2012 Nuclide Activity 1 Sigma Error LLD I-131 <4.73E-03 0.00E+00 4.73E-03 Cs-134 <1.17E-02 0.00E+00 1.17E-02 Cs-137 <4.71E-03 0.00E+00 4.71E-03 Be-7 <7.46E-02 0.00E+00 7.46E-02 K-40 3.53E-01 8.56E-02 2.64E-01 Sample ID: 249441 Sample Dates: 12/10/2012 - 12/17/2012 Nuclide Activity 1 Sigma Error LLD I-131 <6.22E-03 0.00E+00 6.22E-03 Cs-134 <9.40E-03 0.00E+00 9.40E-03 Cs-137 <7.69E-03 0.00E+00 7.69E-03 Be-7 <7.61E-02 0.00E+00 7.61E-02 K-40 1.71E-01 8.02E-02 1.93E-01 Sample ID: 249868 Sample Dates: 12/17/2012 - 12/24/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.58E-03 0.00E+00 8.58E-03 Cs-134 <8.79E-03 0.00E+00 8.79E-03 Cs-137 <1.18E-02 0.00E+00 1.18E-02 Be-7 <5.41E-02 0.00E+00 5.41E-02 K-40 2.95E-01 7.88E-02 5.69E-02 Sample ID: 250175 Sample Dates: 12/24/2012 - 12/31/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.26E-02 0.00E+00 1.26E-02 Cs-134 <1.11E-02 0.00E+00 1.11E-02 Cs-137 <1.15E-02 0.00E+00 1.15E-02 Be-7 <7.98E-02 0.00E+00 7.98E-02 K-40 3.97E-01 9.36E-02 5.96E-02 Sample Point 079 [ INDICATOR - NE @ 0.56 miles ]

Sample ID: 227174 Sample Dates: 1/3/2012 - 1/9/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.03E-02 0.00E+00 1.03E-02 Cs-134 <1.04E-02 0.00E+00 1.04E-02 Cs-137 <1.15E-02 0.00E+00 1.15E-02 Be-7 <8.48E-02 0.00E+00 8.48E-02 K-40 4.25E-01 1.02E-01 1.86E-01 Sample ID: 227308 Sample Dates: 1/9/2012 - 1/16/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.10E-02 0.00E+00 1.10E-02 Cs-134 <8.89E-03 0.00E+00 8.89E-03 Cs-137 <1.41E-02 0.00E+00 1.41E-02 Be-7 <6.80E-02 0.00E+00 6.80E-02 K-40 5.02E-01 1.06E-01 1.53E-01 Sample ID: 227522 Sample Dates: 1/16/2012 - 1/23/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.22E-03 0.00E+00 9.22E-03 Cs-134 <8.59E-03 0.00E+00 8.59E-03 Cs-137 <1.47E-02 0.00E+00 1.47E-02 Be-7 <8.26E-02 0.00E+00 8.26E-02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 54 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 227522 Sample Dates: 1/16/2012 - 1/23/2012 Nuclide Activity 1 Sigma Error LLD K-40 3.84E-01 8.69E-02 1.22E-01 Sample ID: 227844 Sample Dates: 1/23/2012 - 1/30/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.14E-03 0.00E+00 8.14E-03 Cs-134 <6.16E-03 0.00E+00 6.16E-03 Cs-137 <1.21E-02 0.00E+00 1.21E-02 Be-7 <6.08E-02 0.00E+00 6.08E-02 K-40 5.34E-01 1.02E-01 1.02E-01 Sample ID: 228111 Sample Dates: 1/30/2012 - 2/6/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.44E-03 0.00E+00 7.44E-03 Cs-134 <1.16E-02 0.00E+00 1.16E-02 Cs-137 <1.29E-02 0.00E+00 1.29E-02 Be-7 <7.42E-02 0.00E+00 7.42E-02 K-40 <4.18E-01 0.00E+00 4.18E-01 Sample ID: 229422 Sample Dates: 2/6/2012 - 2/13/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.32E-03 0.00E+00 8.32E-03 Cs-134 <1.10E-02 0.00E+00 1.10E-02 Cs-137 <1.51E-02 0.00E+00 1.51E-02 Be-7 <4.85E-02 0.00E+00 4.85E-02 K-40 <4.07E-01 0.00E+00 4.07E-01 Sample ID: 230048 Sample Dates: 2/13/2012 - 2/20/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.48E-03 0.00E+00 8.48E-03 Cs-134 <1.07E-02 0.00E+00 1.07E-02 Cs-137 <1.46E-02 0.00E+00 1.46E-02 Be-7 <7.01E-02 0.00E+00 7.01E-02 K-40 2.50E-01 9.28E-02 1.67E-01 Sample ID: 230723 Sample Dates: 2/20/2012 - 2/27/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.07E-02 0.00E+00 1.07E-02 Cs-134 <1.02E-02 0.00E+00 1.02E-02 Cs-137 <1.22E-02 0.00E+00 1.22E-02 Be-7 <7.13E-02 0.00E+00 7.13E-02 K-40 4.96E-01 1.05E-01 1.63E-01 Sample ID: 230932 Sample Dates: 2/27/2012 - 3/5/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.36E-02 0.00E+00 1.36E-02 Cs-134 <1.18E-02 0.00E+00 1.18E-02 Cs-137 <1.21E-02 0.00E+00 1.21E-02 Be-7 <1.02E-01 0.00E+00 1.02E-01 K-40 3.14E-01 8.40E-02 6.07E-02 Sample ID: 231642 Sample Dates: 3/5/2012 - 3/12/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.58E-03 0.00E+00 7.58E-03 Cs-134 <1.01E-02 0.00E+00 1.01E-02 Cs-137 <1.39E-02 0.00E+00 1.39E-02 Be-7 <6.75E-02 0.00E+00 6.75E-02 K-40 4.93E-01 1.12E-01 1.21E-01 Sample ID: 232456 Sample Dates: 3/12/2012 - 3/19/2012 Nuclide Activity 1 Sigma Error LLD I-131 <6.17E-03 0.00E+00 6.17E-03 Cs-134 <7.58E-03 0.00E+00 7.58E-03 Cs-137 <8.73E-03 0.00E+00 8.73E-03 Be-7 <4.84E-02 0.00E+00 4.84E-02 K-40 2.77E-01 7.02E-02 1.22E-01 Sample ID: 233296 Sample Dates: 3/19/2012 - 3/26/2012 Nuclide Activity 1 Sigma Error LLD I-131 <6.40E-03 0.00E+00 6.40E-03 Cs-134 <8.68E-03 0.00E+00 8.68E-03 Cs-137 <7.58E-03 0.00E+00 7.58E-03 Be-7 <6.12E-02 0.00E+00 6.12E-02 K-40 4.01E-01 1.07E-01 2.14E-01 Sample ID: 233537 Sample Dates: 3/26/2012 - 4/2/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.16E-03 0.00E+00 8.16E-03 Cs-134 <7.41E-03 0.00E+00 7.41E-03 Cs-137 <9.05E-03 0.00E+00 9.05E-03 Be-7 <5.06E-02 0.00E+00 5.06E-02 K-40 4.64E-01 7.63E-02 9.52E-02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 55 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 234455 Sample Dates: 4/2/2012 - 4/9/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.15E-03 0.00E+00 8.15E-03 Cs-134 <8.93E-03 0.00E+00 8.93E-03 Cs-137 <9.97E-03 0.00E+00 9.97E-03 Be-7 <6.24E-02 0.00E+00 6.24E-02 K-40 4.48E-01 7.68E-02 9.84E-02 Sample ID: 234883 Sample Dates: 4/9/2012 - 4/16/2012 Nuclide Activity 1 Sigma Error LLD I-131 <6.27E-03 0.00E+00 6.27E-03 Cs-134 <1.23E-02 0.00E+00 1.23E-02 Cs-137 <1.29E-02 0.00E+00 1.29E-02 Be-7 <1.11E-01 0.00E+00 1.11E-01 K-40 <3.49E-01 0.00E+00 3.49E-01 Sample ID: 235205 Sample Dates: 4/16/2012 - 4/23/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.73E-03 0.00E+00 9.73E-03 Cs-134 <1.11E-02 0.00E+00 1.11E-02 Cs-137 <1.35E-02 0.00E+00 1.35E-02 Be-7 <1.06E-01 0.00E+00 1.06E-01 K-40 3.67E-01 1.45E-01 2.89E-01 Sample ID: 235390 Sample Dates: 4/23/2012 - 4/30/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.33E-02 0.00E+00 1.33E-02 Cs-134 <9.60E-03 0.00E+00 9.60E-03 Cs-137 <1.32E-02 0.00E+00 1.32E-02 Be-7 <1.14E-01 0.00E+00 1.14E-01 K-40 2.95E-01 8.18E-02 2.63E-01 Sample ID: 235728 Sample Dates: 4/30/2012 - 5/7/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.10E-02 0.00E+00 1.10E-02 Cs-134 <1.37E-02 0.00E+00 1.37E-02 Cs-137 <1.14E-02 0.00E+00 1.14E-02 Be-7 <1.06E-01 0.00E+00 1.06E-01 K-40 3.76E-01 8.64E-02 2.11E-01 Sample ID: 235974 Sample Dates: 5/7/2012 - 5/14/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.21E-02 0.00E+00 1.21E-02 Cs-134 <9.42E-03 0.00E+00 9.42E-03 Cs-137 <1.25E-02 0.00E+00 1.25E-02 Be-7 <6.20E-02 0.00E+00 6.20E-02 K-40 3.69E-01 8.79E-02 1.61E-01 Sample ID: 236184 Sample Dates: 5/14/2012 - 5/21/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.22E-02 0.00E+00 1.22E-02 Cs-134 <1.38E-02 0.00E+00 1.38E-02 Cs-137 <1.71E-02 0.00E+00 1.71E-02 Be-7 <8.45E-02 0.00E+00 8.45E-02 K-40 <4.27E-01 0.00E+00 4.27E-01 Sample ID: 236497 Sample Dates: 5/21/2012 - 5/29/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.86E-03 0.00E+00 8.86E-03 Cs-134 <1.01E-02 0.00E+00 1.01E-02 Cs-137 <1.08E-02 0.00E+00 1.08E-02 Be-7 <5.87E-02 0.00E+00 5.87E-02 K-40 2.31E-01 7.65E-02 1.84E-01 Sample ID: 236796 Sample Dates: 5/29/2012 - 6/4/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.40E-02 0.00E+00 1.40E-02 Cs-134 <1.64E-02 0.00E+00 1.64E-02 Cs-137 <1.52E-02 0.00E+00 1.52E-02 Be-7 <7.04E-02 0.00E+00 7.04E-02 K-40 <5.90E-01 0.00E+00 5.90E-01 Sample ID: 237122 Sample Dates: 6/4/2012 - 6/11/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.06E-02 0.00E+00 1.06E-02 Cs-134 <1.06E-02 0.00E+00 1.06E-02 Cs-137 <1.56E-02 0.00E+00 1.56E-02 Be-7 <9.53E-02 0.00E+00 9.53E-02 K-40 3.98E-01 9.13E-02 5.66E-02 Sample ID: 237297 Sample Dates: 6/11/2012 - 6/18/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.04E-02 0.00E+00 1.04E-02 Cs-134 <1.03E-02 0.00E+00 1.03E-02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 56 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 237297 Sample Dates: 6/11/2012 - 6/18/2012 Nuclide Activity 1 Sigma Error LLD Cs-137 <1.26E-02 0.00E+00 1.26E-02 Be-7 <6.65E-02 0.00E+00 6.65E-02 K-40 3.76E-01 7.11E-02 9.88E-02 Sample ID: 237973 Sample Dates: 6/18/2012 - 6/25/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.14E-02 0.00E+00 1.14E-02 Cs-134 <1.34E-02 0.00E+00 1.34E-02 Cs-137 <1.46E-02 0.00E+00 1.46E-02 Be-7 <9.15E-02 0.00E+00 9.15E-02 K-40 <3.75E-01 0.00E+00 3.75E-01 Sample ID: 238725 Sample Dates: 6/25/2012 - 7/2/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.09E-02 0.00E+00 1.09E-02 Cs-134 <9.82E-03 0.00E+00 9.82E-03 Cs-137 <1.76E-02 0.00E+00 1.76E-02 Be-7 <8.49E-02 0.00E+00 8.49E-02 K-40 3.29E-01 8.79E-02 1.70E-01 Sample ID: 239102 Sample Dates: 7/2/2012 - 7/9/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.43E-03 0.00E+00 9.43E-03 Cs-134 <9.10E-03 0.00E+00 9.10E-03 Cs-137 <1.56E-02 0.00E+00 1.56E-02 Be-7 <8.83E-02 0.00E+00 8.83E-02 K-40 <4.12E-01 0.00E+00 4.12E-01 Sample ID: 239874 Sample Dates: 7/9/2012 - 7/16/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.49E-03 0.00E+00 8.49E-03 Cs-134 <7.48E-03 0.00E+00 7.48E-03 Cs-137 <1.03E-02 0.00E+00 1.03E-02 Be-7 <6.77E-02 0.00E+00 6.77E-02 K-40 4.80E-01 8.51E-02 9.98E-02 Sample ID: 239998 Sample Dates: 7/16/2012 - 7/23/2012 Nuclide Activity 1 Sigma Error LLD I-131 <6.15E-03 0.00E+00 6.15E-03 Cs-134 <8.97E-03 0.00E+00 8.97E-03 Cs-137 <1.60E-02 0.00E+00 1.60E-02 Be-7 <8.12E-02 0.00E+00 8.12E-02 K-40 3.43E-01 8.07E-02 1.40E-01 Sample ID: 240320 Sample Dates: 7/23/2012 - 7/30/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.23E-03 0.00E+00 8.23E-03 Cs-134 <8.98E-03 0.00E+00 8.98E-03 Cs-137 <1.27E-02 0.00E+00 1.27E-02 Be-7 <4.74E-02 0.00E+00 4.74E-02 K-40 4.08E-01 7.44E-02 9.81E-02 Sample ID: 240955 Sample Dates: 7/30/2012 - 8/6/2012 Nuclide Activity 1 Sigma Error LLD I-131 <5.76E-03 0.00E+00 5.76E-03 Cs-134 <7.81E-03 0.00E+00 7.81E-03 Cs-137 <1.08E-02 0.00E+00 1.08E-02 Be-7 <7.79E-02 0.00E+00 7.79E-02 K-40 5.25E-01 8.88E-02 1.07E-01 Sample ID: 241226 Sample Dates: 8/6/2012 - 8/13/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.36E-03 0.00E+00 9.36E-03 Cs-134 <1.16E-02 0.00E+00 1.16E-02 Cs-137 <1.36E-02 0.00E+00 1.36E-02 Be-7 <7.50E-02 0.00E+00 7.50E-02 K-40 5.69E-01 9.80E-02 1.03E-01 Sample ID: 241533 Sample Dates: 8/13/2012 - 8/20/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.38E-02 0.00E+00 1.38E-02 Cs-134 <1.47E-02 0.00E+00 1.47E-02 Cs-137 <1.94E-02 0.00E+00 1.94E-02 Be-7 <1.08E-01 0.00E+00 1.08E-01 K-40 4.75E-01 1.04E-01 1.71E-01 Sample ID: 242122 Sample Dates: 8/20/2012 - 8/27/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.12E-03 0.00E+00 9.12E-03 Cs-134 <1.00E-02 0.00E+00 1.00E-02 Cs-137 <9.64E-03 0.00E+00 9.64E-03 Be-7 <6.68E-02 0.00E+00 6.68E-02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 57 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 242122 Sample Dates: 8/20/2012 - 8/27/2012 Nuclide Activity 1 Sigma Error LLD K-40 6.51E-01 9.03E-02 9.09E-02 Sample ID: 242451 Sample Dates: 8/27/2012 - 9/4/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.05E-02 0.00E+00 1.05E-02 Cs-134 <8.94E-03 0.00E+00 8.94E-03 Cs-137 <1.60E-02 0.00E+00 1.60E-02 Be-7 <9.36E-02 0.00E+00 9.36E-02 K-40 <3.84E-01 0.00E+00 3.84E-01 Sample ID: 242978 Sample Dates: 9/4/2012 - 9/10/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.66E-02 0.00E+00 1.66E-02 Cs-134 <1.87E-02 0.00E+00 1.87E-02 Cs-137 <2.06E-02 0.00E+00 2.06E-02 Be-7 <1.30E-01 0.00E+00 1.30E-01 K-40 3.78E-01 1.01E-01 7.30E-02 Sample ID: 243736 Sample Dates: 9/10/2012 - 9/17/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.65E-02 0.00E+00 1.65E-02 Cs-134 <1.55E-02 0.00E+00 1.55E-02 Cs-137 <1.33E-02 0.00E+00 1.33E-02 Be-7 <1.12E-01 0.00E+00 1.12E-01 K-40 3.43E-01 8.85E-02 6.18E-02 Sample ID: 244141 Sample Dates: 9/17/2012 - 9/24/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.80E-03 0.00E+00 8.80E-03 Cs-134 <9.40E-03 0.00E+00 9.40E-03 Cs-137 <1.35E-02 0.00E+00 1.35E-02 Be-7 <5.05E-02 0.00E+00 5.05E-02 K-40 <4.16E-01 0.00E+00 4.16E-01 Sample ID: 245013 Sample Dates: 9/24/2012 - 10/1/2012 Nuclide Activity 1 Sigma Error LLD I-131 <5.74E-03 0.00E+00 5.74E-03 Cs-134 <8.00E-03 0.00E+00 8.00E-03 Cs-137 <1.07E-02 0.00E+00 1.07E-02 Be-7 <5.32E-02 0.00E+00 5.32E-02 K-40 3.70E-01 6.35E-02 2.94E-02 Sample ID: 245833 Sample Dates: 10/1/2012 - 10/8/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.00E-03 0.00E+00 9.00E-03 Cs-134 <9.75E-03 0.00E+00 9.75E-03 Cs-137 <9.71E-03 0.00E+00 9.71E-03 Be-7 <5.80E-02 0.00E+00 5.80E-02 K-40 4.17E-01 7.60E-02 9.90E-02 Sample ID: 246688 Sample Dates: 10/8/2012 - 10/15/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.45E-02 0.00E+00 1.45E-02 Cs-134 <1.47E-02 0.00E+00 1.47E-02 Cs-137 <1.79E-02 0.00E+00 1.79E-02 Be-7 <1.09E-01 0.00E+00 1.09E-01 K-40 3.51E-01 9.07E-02 1.69E-01 Sample ID: 247096 Sample Dates: 10/15/2012 - 10/22/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.14E-02 0.00E+00 1.14E-02 Cs-134 <9.79E-03 0.00E+00 9.79E-03 Cs-137 <7.75E-03 0.00E+00 7.75E-03 Be-7 <9.58E-02 0.00E+00 9.58E-02 K-40 <3.70E-01 0.00E+00 3.70E-01 Sample ID: 247412 Sample Dates: 10/22/2012 - 10/29/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.22E-03 0.00E+00 9.22E-03 Cs-134 <9.18E-03 0.00E+00 9.18E-03 Cs-137 <1.27E-02 0.00E+00 1.27E-02 Be-7 <4.62E-02 0.00E+00 4.62E-02 K-40 <4.37E-01 0.00E+00 4.37E-01 Sample ID: 247750 Sample Dates: 10/29/2012 - 11/5/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.78E-03 0.00E+00 9.78E-03 Cs-134 <9.03E-03 0.00E+00 9.03E-03 Cs-137 <1.24E-02 0.00E+00 1.24E-02 Be-7 <6.90E-02 0.00E+00 6.90E-02 K-40 4.45E-01 7.87E-02 1.26E-01 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 58 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 247945 Sample Dates: 11/5/2012 - 11/12/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.00E-02 0.00E+00 1.00E-02 Cs-134 <9.46E-03 0.00E+00 9.46E-03 Cs-137 <1.49E-02 0.00E+00 1.49E-02 Be-7 <7.75E-02 0.00E+00 7.75E-02 K-40 3.93E-01 7.90E-02 3.84E-02 Sample ID: 248349 Sample Dates: 11/12/2012 - 11/19/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.80E-03 0.00E+00 7.80E-03 Cs-134 <1.24E-02 0.00E+00 1.24E-02 Cs-137 <9.84E-03 0.00E+00 9.84E-03 Be-7 <6.96E-02 0.00E+00 6.96E-02 K-40 4.88E-01 8.24E-02 1.00E-01 Sample ID: 248628 Sample Dates: 11/19/2012 - 11/26/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.15E-03 0.00E+00 8.15E-03 Cs-134 <6.36E-03 0.00E+00 6.36E-03 Cs-137 <1.04E-02 0.00E+00 1.04E-02 Be-7 <5.98E-02 0.00E+00 5.98E-02 K-40 <4.08E-01 0.00E+00 4.08E-01 Sample ID: 249001 Sample Dates: 11/26/2012 - 12/3/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.59E-03 0.00E+00 8.59E-03 Cs-134 <9.70E-03 0.00E+00 9.70E-03 Cs-137 <7.89E-03 0.00E+00 7.89E-03 Be-7 <6.38E-02 0.00E+00 6.38E-02 K-40 3.36E-01 9.95E-02 1.70E-01 Sample ID: 249240 Sample Dates: 12/3/2012 - 12/10/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.71E-03 0.00E+00 7.71E-03 Cs-134 <9.53E-03 0.00E+00 9.53E-03 Cs-137 <1.49E-02 0.00E+00 1.49E-02 Be-7 <9.55E-02 0.00E+00 9.55E-02 K-40 3.41E-01 8.26E-02 1.49E-01 Sample ID: 249438 Sample Dates: 12/10/2012 - 12/17/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.24E-03 0.00E+00 7.24E-03 Cs-134 <6.44E-03 0.00E+00 6.44E-03 Cs-137 <8.58E-03 0.00E+00 8.58E-03 Be-7 <5.83E-02 0.00E+00 5.83E-02 K-40 5.38E-01 1.08E-01 1.54E-01 Sample ID: 249865 Sample Dates: 12/17/2012 - 12/24/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.61E-02 0.00E+00 1.61E-02 Cs-134 <1.35E-02 0.00E+00 1.35E-02 Cs-137 <1.30E-02 0.00E+00 1.30E-02 Be-7 <8.52E-02 0.00E+00 8.52E-02 K-40 <3.55E-01 0.00E+00 3.55E-01 Sample ID: 250172 Sample Dates: 12/24/2012 - 12/31/2012 Nuclide Activity 1 Sigma Error LLD I-131 <6.78E-03 0.00E+00 6.78E-03 Cs-134 <6.36E-03 0.00E+00 6.36E-03 Cs-137 <1.03E-02 0.00E+00 1.03E-02 Be-7 <6.00E-02 0.00E+00 6.00E-02 K-40 2.14E-01 8.76E-02 2.28E-01 Sample Point 081 [ CONTROL - SE @ 9.33 miles ]

Sample ID: 227175 Sample Dates: 1/3/2012 - 1/9/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.12E-02 0.00E+00 1.12E-02 Cs-134 <1.02E-02 0.00E+00 1.02E-02 Cs-137 <9.55E-03 0.00E+00 9.55E-03 Be-7 <6.96E-02 0.00E+00 6.96E-02 K-40 <4.08E-01 0.00E+00 4.08E-01 Sample ID: 227309 Sample Dates: 1/9/2012 - 1/16/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.62E-03 0.00E+00 9.62E-03 Cs-134 <1.11E-02 0.00E+00 1.11E-02 Cs-137 <1.31E-02 0.00E+00 1.31E-02 Be-7 <7.60E-02 0.00E+00 7.60E-02 K-40 2.78E-01 7.41E-02 1.17E-01 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 59 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 227523 Sample Dates: 1/16/2012 - 1/23/2012 Nuclide Activity 1 Sigma Error LLD I-131 <6.74E-03 0.00E+00 6.74E-03 Cs-134 <1.10E-02 0.00E+00 1.10E-02 Cs-137 <1.37E-02 0.00E+00 1.37E-02 Be-7 <5.11E-02 0.00E+00 5.11E-02 K-40 3.66E-01 8.39E-02 5.20E-02 Sample ID: 227845 Sample Dates: 1/23/2012 - 1/30/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.18E-02 0.00E+00 1.18E-02 Cs-134 <1.07E-02 0.00E+00 1.07E-02 Cs-137 <2.04E-02 0.00E+00 2.04E-02 Be-7 <8.27E-02 0.00E+00 8.27E-02 K-40 3.65E-01 9.14E-02 1.91E-01 Sample ID: 228112 Sample Dates: 1/30/2012 - 2/6/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.20E-03 0.00E+00 8.20E-03 Cs-134 <1.23E-02 0.00E+00 1.23E-02 Cs-137 <1.27E-02 0.00E+00 1.27E-02 Be-7 <6.07E-02 0.00E+00 6.07E-02 K-40 5.04E-01 8.18E-02 1.24E-01 Sample ID: 229423 Sample Dates: 2/6/2012 - 2/13/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.41E-02 0.00E+00 1.41E-02 Cs-134 <1.26E-02 0.00E+00 1.26E-02 Cs-137 <1.08E-02 0.00E+00 1.08E-02 Be-7 <1.10E-01 0.00E+00 1.10E-01 K-40 4.60E-01 1.03E-01 1.68E-01 Sample ID: 230049 Sample Dates: 2/13/2012 - 2/20/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.13E-03 0.00E+00 8.13E-03 Cs-134 <9.47E-03 0.00E+00 9.47E-03 Cs-137 <1.06E-02 0.00E+00 1.06E-02 Be-7 <8.98E-02 0.00E+00 8.98E-02 K-40 4.94E-01 8.11E-02 3.60E-02 Sample ID: 230724 Sample Dates: 2/20/2012 - 2/27/2012 Nuclide Activity 1 Sigma Error LLD I-131 <6.31E-03 0.00E+00 6.31E-03 Cs-134 <7.47E-03 0.00E+00 7.47E-03 Cs-137 <2.79E-03 0.00E+00 2.79E-03 Be-7 <9.74E-02 0.00E+00 9.74E-02 K-40 3.52E-01 1.06E-01 1.44E-01 Sample ID: 230933 Sample Dates: 2/27/2012 - 3/5/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.36E-02 0.00E+00 1.36E-02 Cs-134 <1.36E-02 0.00E+00 1.36E-02 Cs-137 <1.50E-02 0.00E+00 1.50E-02 Be-7 <1.33E-01 0.00E+00 1.33E-01 K-40 <3.67E-01 0.00E+00 3.67E-01 Sample ID: 231643 Sample Dates: 3/5/2012 - 3/12/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.17E-03 0.00E+00 7.17E-03 Cs-134 <7.48E-03 0.00E+00 7.48E-03 Cs-137 <8.98E-03 0.00E+00 8.98E-03 Be-7 <3.76E-02 0.00E+00 3.76E-02 K-40 4.69E-01 8.78E-02 9.92E-02 Sample ID: 232457 Sample Dates: 3/12/2012 - 3/19/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.10E-02 0.00E+00 1.10E-02 Cs-134 <8.86E-03 0.00E+00 8.86E-03 Cs-137 <1.11E-02 0.00E+00 1.11E-02 Be-7 <8.85E-02 0.00E+00 8.85E-02 K-40 3.14E-01 8.66E-02 3.61E-02 Sample ID: 233297 Sample Dates: 3/19/2012 - 3/26/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.37E-03 0.00E+00 7.37E-03 Cs-134 <7.93E-03 0.00E+00 7.93E-03 Cs-137 <7.40E-03 0.00E+00 7.40E-03 Be-7 <6.87E-02 0.00E+00 6.87E-02 K-40 3.81E-01 7.75E-02 1.23E-01 Sample ID: 233538 Sample Dates: 3/26/2012 - 4/2/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.72E-03 0.00E+00 8.72E-03 Cs-134 <9.34E-03 0.00E+00 9.34E-03 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 60 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 233538 Sample Dates: 3/26/2012 - 4/2/2012 Nuclide Activity 1 Sigma Error LLD Cs-137 <1.54E-02 0.00E+00 1.54E-02 Be-7 <8.61E-02 0.00E+00 8.61E-02 K-40 4.00E-01 9.17E-02 1.56E-01 Sample ID: 234456 Sample Dates: 4/2/2012 - 4/9/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.43E-03 0.00E+00 9.43E-03 Cs-134 <1.13E-02 0.00E+00 1.13E-02 Cs-137 <5.58E-03 0.00E+00 5.58E-03 Be-7 <7.65E-02 0.00E+00 7.65E-02 K-40 3.77E-01 7.13E-02 3.64E-02 Sample ID: 234884 Sample Dates: 4/9/2012 - 4/16/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.80E-03 0.00E+00 7.80E-03 Cs-134 <1.17E-02 0.00E+00 1.17E-02 Cs-137 <1.12E-02 0.00E+00 1.12E-02 Be-7 <7.55E-02 0.00E+00 7.55E-02 K-40 2.53E-01 8.31E-02 1.57E-01 Sample ID: 235206 Sample Dates: 4/16/2012 - 4/23/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.01E-02 0.00E+00 1.01E-02 Cs-134 <1.20E-02 0.00E+00 1.20E-02 Cs-137 <1.24E-02 0.00E+00 1.24E-02 Be-7 <6.25E-02 0.00E+00 6.25E-02 K-40 3.10E-01 7.75E-02 5.23E-02 Sample ID: 235391 Sample Dates: 4/23/2012 - 4/30/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.09E-03 0.00E+00 8.09E-03 Cs-134 <9.93E-03 0.00E+00 9.93E-03 Cs-137 <1.14E-02 0.00E+00 1.14E-02 Be-7 <5.81E-02 0.00E+00 5.81E-02 K-40 4.13E-01 7.41E-02 1.24E-01 Sample ID: 235729 Sample Dates: 4/30/2012 - 5/7/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.15E-02 0.00E+00 1.15E-02 Cs-134 <1.12E-02 0.00E+00 1.12E-02 Cs-137 <1.64E-02 0.00E+00 1.64E-02 Be-7 <9.31E-02 0.00E+00 9.31E-02 K-40 3.27E-01 1.14E-01 2.24E-01 Sample ID: 235975 Sample Dates: 5/7/2012 - 5/14/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.30E-02 0.00E+00 1.30E-02 Cs-134 <1.30E-02 0.00E+00 1.30E-02 Cs-137 <1.70E-02 0.00E+00 1.70E-02 Be-7 <1.00E-01 0.00E+00 1.00E-01 K-40 2.41E-01 9.69E-02 2.04E-01 Sample ID: 236185 Sample Dates: 5/14/2012 - 5/21/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.04E-03 0.00E+00 9.04E-03 Cs-134 <8.84E-03 0.00E+00 8.84E-03 Cs-137 <1.20E-02 0.00E+00 1.20E-02 Be-7 <7.42E-02 0.00E+00 7.42E-02 K-40 2.26E-01 8.77E-02 1.72E-01 Sample ID: 236498 Sample Dates: 5/21/2012 - 5/29/2012 Nuclide Activity 1 Sigma Error LLD I-131 <6.96E-03 0.00E+00 6.96E-03 Cs-134 <9.64E-03 0.00E+00 9.64E-03 Cs-137 <1.29E-02 0.00E+00 1.29E-02 Be-7 <6.81E-02 0.00E+00 6.81E-02 K-40 2.93E-01 7.33E-02 4.95E-02 Sample ID: 236797 Sample Dates: 5/29/2012 - 6/4/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.43E-03 0.00E+00 9.43E-03 Cs-134 <1.11E-02 0.00E+00 1.11E-02 Cs-137 <1.42E-02 0.00E+00 1.42E-02 Be-7 <1.30E-01 0.00E+00 1.30E-01 K-40 <3.64E-01 0.00E+00 3.64E-01 Sample ID: 237123 Sample Dates: 6/4/2012 - 6/11/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.44E-02 0.00E+00 1.44E-02 Cs-134 <9.41E-03 0.00E+00 9.41E-03 Cs-137 <1.91E-02 0.00E+00 1.91E-02 Be-7 <8.93E-02 0.00E+00 8.93E-02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 61 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 237123 Sample Dates: 6/4/2012 - 6/11/2012 Nuclide Activity 1 Sigma Error LLD K-40 <4.25E-01 0.00E+00 4.25E-01 Sample ID: 237298 Sample Dates: 6/11/2012 - 6/18/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.57E-03 0.00E+00 8.57E-03 Cs-134 <1.05E-02 0.00E+00 1.05E-02 Cs-137 <1.45E-02 0.00E+00 1.45E-02 Be-7 <7.59E-02 0.00E+00 7.59E-02 K-40 6.83E-01 1.16E-01 1.24E-01 Sample ID: 237974 Sample Dates: 6/18/2012 - 6/25/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.38E-03 0.00E+00 9.38E-03 Cs-134 <9.62E-03 0.00E+00 9.62E-03 Cs-137 <8.94E-03 0.00E+00 8.94E-03 Be-7 <4.82E-02 0.00E+00 4.82E-02 K-40 4.34E-01 7.13E-02 8.47E-02 Sample ID: 238726 Sample Dates: 6/25/2012 - 7/2/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.37E-03 0.00E+00 7.37E-03 Cs-134 <6.34E-03 0.00E+00 6.34E-03 Cs-137 <1.66E-02 0.00E+00 1.66E-02 Be-7 <7.18E-02 0.00E+00 7.18E-02 K-40 3.72E-01 8.53E-02 5.29E-02 Sample ID: 239103 Sample Dates: 7/2/2012 - 7/9/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.20E-03 0.00E+00 8.20E-03 Cs-134 <9.33E-03 0.00E+00 9.33E-03 Cs-137 <8.60E-03 0.00E+00 8.60E-03 Be-7 <7.20E-02 0.00E+00 7.20E-02 K-40 3.68E-01 8.40E-02 1.22E-01 Sample ID: 239875 Sample Dates: 7/9/2012 - 7/16/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.14E-02 0.00E+00 1.14E-02 Cs-134 <1.15E-02 0.00E+00 1.15E-02 Cs-137 <1.32E-02 0.00E+00 1.32E-02 Be-7 <7.95E-02 0.00E+00 7.95E-02 K-40 5.43E-01 8.37E-02 1.25E-01 Sample ID: 239999 Sample Dates: 7/16/2012 - 7/23/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.74E-03 0.00E+00 7.74E-03 Cs-134 <1.17E-02 0.00E+00 1.17E-02 Cs-137 <1.35E-02 0.00E+00 1.35E-02 Be-7 <5.24E-02 0.00E+00 5.24E-02 K-40 4.32E-01 8.83E-02 9.49E-02 Sample ID: 240321 Sample Dates: 7/23/2012 - 7/30/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.04E-02 0.00E+00 1.04E-02 Cs-134 <1.14E-02 0.00E+00 1.14E-02 Cs-137 <2.09E-02 0.00E+00 2.09E-02 Be-7 <6.64E-02 0.00E+00 6.64E-02 K-40 <4.24E-01 0.00E+00 4.24E-01 Sample ID: 240956 Sample Dates: 7/30/2012 - 8/6/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.38E-03 0.00E+00 9.38E-03 Cs-134 <1.14E-02 0.00E+00 1.14E-02 Cs-137 <1.46E-02 0.00E+00 1.46E-02 Be-7 <9.14E-02 0.00E+00 9.14E-02 K-40 2.29E-01 7.23E-02 6.18E-02 Sample ID: 241227 Sample Dates: 8/6/2012 - 8/13/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.91E-03 0.00E+00 8.91E-03 Cs-134 <7.45E-03 0.00E+00 7.45E-03 Cs-137 <1.07E-02 0.00E+00 1.07E-02 Be-7 <5.88E-02 0.00E+00 5.88E-02 K-40 6.02E-01 1.21E-01 1.45E-01 Sample ID: 241534 Sample Dates: 8/13/2012 - 8/20/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.44E-03 0.00E+00 9.44E-03 Cs-134 <1.36E-02 0.00E+00 1.36E-02 Cs-137 <1.53E-02 0.00E+00 1.53E-02 Be-7 <7.87E-02 0.00E+00 7.87E-02 K-40 3.22E-01 8.59E-02 2.20E-01 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 62 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 242123 Sample Dates: 8/20/2012 - 8/27/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.13E-02 0.00E+00 1.13E-02 Cs-134 <1.02E-02 0.00E+00 1.02E-02 Cs-137 <1.58E-02 0.00E+00 1.58E-02 Be-7 <1.24E-01 0.00E+00 1.24E-01 K-40 4.10E-01 1.20E-01 2.23E-01 Sample ID: 242452 Sample Dates: 8/27/2012 - 9/4/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.68E-02 0.00E+00 1.68E-02 Cs-134 <1.11E-02 0.00E+00 1.11E-02 Cs-137 <1.60E-02 0.00E+00 1.60E-02 Be-7 <9.23E-02 0.00E+00 9.23E-02 K-40 3.45E-01 8.38E-02 1.76E-01 Sample ID: 242979 Sample Dates: 9/4/2012 - 9/10/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.88E-03 0.00E+00 9.88E-03 Cs-134 <1.24E-02 0.00E+00 1.24E-02 Cs-137 <1.17E-02 0.00E+00 1.17E-02 Be-7 <7.99E-02 0.00E+00 7.99E-02 K-40 2.78E-01 1.29E-01 2.71E-01 Sample ID: 243737 Sample Dates: 9/10/2012 - 9/17/2012 Nuclide Activity 1 Sigma Error LLD I-131 <4.87E-03 0.00E+00 4.87E-03 Cs-134 <2.31E-03 0.00E+00 2.31E-03 Cs-137 <9.42E-03 0.00E+00 9.42E-03 Be-7 <7.28E-02 0.00E+00 7.28E-02 K-40 2.51E-01 7.25E-02 1.75E-01 Sample ID: 244142 Sample Dates: 9/17/2012 - 9/24/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.02E-03 0.00E+00 9.02E-03 Cs-134 <1.21E-02 0.00E+00 1.21E-02 Cs-137 <1.24E-02 0.00E+00 1.24E-02 Be-7 <7.83E-02 0.00E+00 7.83E-02 K-40 3.79E-01 8.70E-02 1.50E-01 Sample ID: 245014 Sample Dates: 9/24/2012 - 10/1/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.46E-03 0.00E+00 9.46E-03 Cs-134 <7.98E-03 0.00E+00 7.98E-03 Cs-137 <1.11E-02 0.00E+00 1.11E-02 Be-7 <6.83E-02 0.00E+00 6.83E-02 K-40 3.37E-01 8.43E-02 5.70E-02 Sample ID: 245834 Sample Dates: 10/1/2012 - 10/8/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.65E-03 0.00E+00 9.65E-03 Cs-134 <1.36E-02 0.00E+00 1.36E-02 Cs-137 <2.92E-03 0.00E+00 2.92E-03 Be-7 <7.29E-02 0.00E+00 7.29E-02 K-40 2.66E-01 9.15E-02 1.76E-01 Sample ID: 246689 Sample Dates: 10/8/2012 - 10/15/2012 Nuclide Activity 1 Sigma Error LLD I-131 <4.00E-03 0.00E+00 4.00E-03 Cs-134 <8.73E-03 0.00E+00 8.73E-03 Cs-137 <8.84E-03 0.00E+00 8.84E-03 Be-7 <6.34E-02 0.00E+00 6.34E-02 K-40 2.86E-01 7.65E-02 2.33E-01 Sample ID: 247097 Sample Dates: 10/15/2012 - 10/22/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.72E-03 0.00E+00 8.72E-03 Cs-134 <9.56E-03 0.00E+00 9.56E-03 Cs-137 <1.16E-02 0.00E+00 1.16E-02 Be-7 <7.07E-02 0.00E+00 7.07E-02 K-40 2.40E-01 7.22E-02 1.59E-01 Sample ID: 247413 Sample Dates: 10/22/2012 - 10/29/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.03E-03 0.00E+00 8.03E-03 Cs-134 <7.98E-03 0.00E+00 7.98E-03 Cs-137 <1.24E-02 0.00E+00 1.24E-02 Be-7 <1.71E-02 0.00E+00 1.71E-02 K-40 <3.34E-01 0.00E+00 3.34E-01 Sample ID: 247751 Sample Dates: 10/29/2012 - 11/5/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.57E-03 0.00E+00 9.57E-03 Cs-134 <1.43E-02 0.00E+00 1.43E-02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 63 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 247751 Sample Dates: 10/29/2012 - 11/5/2012 Nuclide Activity 1 Sigma Error LLD Cs-137 <1.70E-02 0.00E+00 1.70E-02 Be-7 <1.12E-01 0.00E+00 1.12E-01 K-40 3.30E-01 8.53E-02 5.95E-02 Sample ID: 247946 Sample Dates: 11/5/2012 - 11/12/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.63E-03 0.00E+00 9.63E-03 Cs-134 <9.35E-03 0.00E+00 9.35E-03 Cs-137 <1.10E-02 0.00E+00 1.10E-02 Be-7 <5.02E-02 0.00E+00 5.02E-02 K-40 3.29E-01 8.09E-02 1.45E-01 Sample ID: 248350 Sample Dates: 11/12/2012 - 11/19/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.80E-03 0.00E+00 9.80E-03 Cs-134 <8.95E-03 0.00E+00 8.95E-03 Cs-137 <1.30E-02 0.00E+00 1.30E-02 Be-7 <1.03E-01 0.00E+00 1.03E-01 K-40 2.86E-01 7.94E-02 2.39E-01 Sample ID: 248629 Sample Dates: 11/19/2012 - 11/26/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.28E-02 0.00E+00 1.28E-02 Cs-134 <1.08E-02 0.00E+00 1.08E-02 Cs-137 <1.82E-02 0.00E+00 1.82E-02 Be-7 <8.07E-02 0.00E+00 8.07E-02 K-40 <4.54E-01 0.00E+00 4.54E-01 Sample ID: 249002 Sample Dates: 11/26/2012 - 12/3/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.04E-03 0.00E+00 8.04E-03 Cs-134 <9.61E-03 0.00E+00 9.61E-03 Cs-137 <1.40E-02 0.00E+00 1.40E-02 Be-7 <8.84E-02 0.00E+00 8.84E-02 K-40 3.43E-01 1.15E-01 1.91E-01 Sample ID: 249241 Sample Dates: 12/3/2012 - 12/10/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.61E-03 0.00E+00 9.61E-03 Cs-134 <1.09E-02 0.00E+00 1.09E-02 Cs-137 <1.42E-02 0.00E+00 1.42E-02 Be-7 <8.09E-02 0.00E+00 8.09E-02 K-40 3.27E-01 6.82E-02 1.05E-01 Sample ID: 249439 Sample Dates: 12/10/2012 - 12/17/2012 Nuclide Activity 1 Sigma Error LLD I-131 <6.98E-03 0.00E+00 6.98E-03 Cs-134 <9.59E-03 0.00E+00 9.59E-03 Cs-137 <1.24E-02 0.00E+00 1.24E-02 Be-7 <7.55E-02 0.00E+00 7.55E-02 K-40 2.55E-01 7.36E-02 5.74E-02 Sample ID: 249866 Sample Dates: 12/17/2012 - 12/24/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.03E-02 0.00E+00 1.03E-02 Cs-134 <1.22E-02 0.00E+00 1.22E-02 Cs-137 <1.06E-02 0.00E+00 1.06E-02 Be-7 <7.88E-02 0.00E+00 7.88E-02 K-40 3.62E-01 8.48E-02 1.55E-01 Sample ID: 250173 Sample Dates: 12/24/2012 - 12/31/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.14E-03 0.00E+00 7.14E-03 Cs-134 <9.47E-03 0.00E+00 9.47E-03 Cs-137 <1.18E-02 0.00E+00 1.18E-02 Be-7 <5.59E-02 0.00E+00 5.59E-02 K-40 2.79E-01 6.23E-02 1.02E-01 Sample Point 084 [ INDICATOR - NNE @ 2.58 miles ]

Sample ID: 227176 Sample Dates: 1/3/2012 - 1/9/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.93E-02 0.00E+00 1.93E-02 Cs-134 <1.22E-02 0.00E+00 1.22E-02 Cs-137 <1.25E-02 0.00E+00 1.25E-02 Be-7 <1.09E-01 0.00E+00 1.09E-01 K-40 2.84E-01 1.17E-01 1.83E-01 Sample ID: 227310 Sample Dates: 1/9/2012 - 1/16/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.16E-03 0.00E+00 9.16E-03 Cs-134 <8.55E-03 0.00E+00 8.55E-03 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 64 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 227310 Sample Dates: 1/9/2012 - 1/16/2012 Nuclide Activity 1 Sigma Error LLD Cs-137 <1.25E-02 0.00E+00 1.25E-02 Be-7 <6.01E-02 0.00E+00 6.01E-02 K-40 3.06E-01 8.02E-02 1.40E-01 Sample ID: 227524 Sample Dates: 1/16/2012 - 1/23/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.48E-02 0.00E+00 1.48E-02 Cs-134 <1.54E-02 0.00E+00 1.54E-02 Cs-137 <1.47E-02 0.00E+00 1.47E-02 Be-7 <9.60E-02 0.00E+00 9.60E-02 K-40 4.13E-01 9.74E-02 6.21E-02 Sample ID: 227846 Sample Dates: 1/23/2012 - 1/30/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.12E-02 0.00E+00 1.12E-02 Cs-134 <1.42E-02 0.00E+00 1.42E-02 Cs-137 <1.23E-02 0.00E+00 1.23E-02 Be-7 <1.03E-01 0.00E+00 1.03E-01 K-40 3.83E-01 1.19E-01 2.54E-01 Sample ID: 228113 Sample Dates: 1/30/2012 - 2/6/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.11E-03 0.00E+00 7.11E-03 Cs-134 <7.12E-03 0.00E+00 7.12E-03 Cs-137 <1.13E-02 0.00E+00 1.13E-02 Be-7 <6.39E-02 0.00E+00 6.39E-02 K-40 3.68E-01 6.96E-02 1.53E-01 Sample ID: 229424 Sample Dates: 2/6/2012 - 2/13/2012 Nuclide Activity 1 Sigma Error LLD I-131 <2.32E-03 0.00E+00 2.32E-03 Cs-134 <1.43E-02 0.00E+00 1.43E-02 Cs-137 <1.46E-02 0.00E+00 1.46E-02 Be-7 <1.40E-01 0.00E+00 1.40E-01 K-40 2.83E-01 8.18E-02 6.38E-02 Sample ID: 230050 Sample Dates: 2/13/2012 - 2/20/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.50E-03 0.00E+00 7.50E-03 Cs-134 <7.01E-03 0.00E+00 7.01E-03 Cs-137 <1.23E-02 0.00E+00 1.23E-02 Be-7 <6.74E-02 0.00E+00 6.74E-02 K-40 5.56E-01 9.71E-02 1.25E-01 Sample ID: 230725 Sample Dates: 2/20/2012 - 2/27/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.33E-02 0.00E+00 1.33E-02 Cs-134 <1.04E-02 0.00E+00 1.04E-02 Cs-137 <1.80E-02 0.00E+00 1.80E-02 Be-7 <6.37E-02 0.00E+00 6.37E-02 K-40 3.84E-01 1.15E-01 1.63E-01 Sample ID: 230934 Sample Dates: 2/27/2012 - 3/5/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.45E-02 0.00E+00 1.45E-02 Cs-134 <1.49E-02 0.00E+00 1.49E-02 Cs-137 <1.74E-02 0.00E+00 1.74E-02 Be-7 <1.03E-01 0.00E+00 1.03E-01 K-40 3.41E-01 1.08E-01 1.65E-01 Sample ID: 231644 Sample Dates: 3/5/2012 - 3/12/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.78E-03 0.00E+00 9.78E-03 Cs-134 <1.12E-02 0.00E+00 1.12E-02 Cs-137 <1.38E-02 0.00E+00 1.38E-02 Be-7 <7.96E-02 0.00E+00 7.96E-02 K-40 3.42E-01 1.03E-01 2.32E-01 Sample ID: 232458 Sample Dates: 3/12/2012 - 3/19/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.03E-02 0.00E+00 1.03E-02 Cs-134 <1.17E-02 0.00E+00 1.17E-02 Cs-137 <1.24E-02 0.00E+00 1.24E-02 Be-7 <7.11E-02 0.00E+00 7.11E-02 K-40 <4.43E-01 0.00E+00 4.43E-01 Sample ID: 233298 Sample Dates: 3/19/2012 - 3/26/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.04E-02 0.00E+00 1.04E-02 Cs-134 <7.55E-03 0.00E+00 7.55E-03 Cs-137 <1.71E-02 0.00E+00 1.71E-02 Be-7 <9.51E-02 0.00E+00 9.51E-02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 65 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 233298 Sample Dates: 3/19/2012 - 3/26/2012 Nuclide Activity 1 Sigma Error LLD K-40 4.51E-01 1.21E-01 1.63E-01 Sample ID: 233539 Sample Dates: 3/26/2012 - 4/2/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.03E-02 0.00E+00 1.03E-02 Cs-134 <1.47E-02 0.00E+00 1.47E-02 Cs-137 <1.29E-02 0.00E+00 1.29E-02 Be-7 <6.69E-02 0.00E+00 6.69E-02 K-40 6.95E-01 1.25E-01 2.03E-01 Sample ID: 234457 Sample Dates: 4/2/2012 - 4/9/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.12E-02 0.00E+00 1.12E-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 <8.78E-02 0.00E+00 8.78E-02 K-40 2.88E-01 9.61E-02 1.47E-01 Sample ID: 234885 Sample Dates: 4/9/2012 - 4/16/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.20E-03 0.00E+00 7.20E-03 Cs-134 <8.60E-03 0.00E+00 8.60E-03 Cs-137 <1.29E-02 0.00E+00 1.29E-02 Be-7 <8.48E-02 0.00E+00 8.48E-02 K-40 3.65E-01 8.38E-02 1.40E-01 Sample ID: 235207 Sample Dates: 4/16/2012 - 4/23/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.57E-02 0.00E+00 1.57E-02 Cs-134 <1.52E-02 0.00E+00 1.52E-02 Cs-137 <1.44E-02 0.00E+00 1.44E-02 Be-7 <9.80E-02 0.00E+00 9.80E-02 K-40 3.07E-01 1.13E-01 1.67E-01 Sample ID: 235392 Sample Dates: 4/23/2012 - 4/30/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.01E-02 0.00E+00 1.01E-02 Cs-134 <9.66E-03 0.00E+00 9.66E-03 Cs-137 <8.42E-03 0.00E+00 8.42E-03 Be-7 <9.25E-02 0.00E+00 9.25E-02 K-40 3.12E-01 8.07E-02 5.63E-02 Sample ID: 235730 Sample Dates: 4/30/2012 - 5/7/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.24E-02 0.00E+00 1.24E-02 Cs-134 <1.47E-02 0.00E+00 1.47E-02 Cs-137 <9.78E-03 0.00E+00 9.78E-03 Be-7 <9.29E-02 0.00E+00 9.29E-02 K-40 3.64E-01 1.13E-01 2.12E-01 Sample ID: 235976 Sample Dates: 5/7/2012 - 5/14/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.93E-03 0.00E+00 9.93E-03 Cs-134 <8.12E-03 0.00E+00 8.12E-03 Cs-137 <1.25E-02 0.00E+00 1.25E-02 Be-7 <8.77E-02 0.00E+00 8.77E-02 K-40 <3.24E-01 0.00E+00 3.24E-01 Sample ID: 236186 Sample Dates: 5/14/2012 - 5/21/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.04E-02 0.00E+00 1.04E-02 Cs-134 <1.23E-02 0.00E+00 1.23E-02 Cs-137 <1.56E-02 0.00E+00 1.56E-02 Be-7 <4.94E-02 0.00E+00 4.94E-02 K-40 2.71E-01 7.24E-02 5.23E-02 Sample ID: 236499 Sample Dates: 5/21/2012 - 5/29/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.61E-03 0.00E+00 7.61E-03 Cs-134 <7.99E-03 0.00E+00 7.99E-03 Cs-137 <8.23E-03 0.00E+00 8.23E-03 Be-7 <8.65E-02 0.00E+00 8.65E-02 K-40 4.33E-01 6.94E-02 7.92E-02 Sample ID: 236798 Sample Dates: 5/29/2012 - 6/4/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.32E-03 0.00E+00 8.32E-03 Cs-134 <1.57E-02 0.00E+00 1.57E-02 Cs-137 <1.79E-02 0.00E+00 1.79E-02 Be-7 <7.52E-02 0.00E+00 7.52E-02 K-40 4.42E-01 1.02E-01 1.70E-01 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 66 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 237124 Sample Dates: 6/4/2012 - 6/11/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.61E-03 0.00E+00 8.61E-03 Cs-134 <8.86E-03 0.00E+00 8.86E-03 Cs-137 <1.24E-02 0.00E+00 1.24E-02 Be-7 <8.60E-02 0.00E+00 8.60E-02 K-40 4.79E-01 9.14E-02 9.46E-02 Sample ID: 237299 Sample Dates: 6/11/2012 - 6/18/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.23E-02 0.00E+00 1.23E-02 Cs-134 <1.46E-02 0.00E+00 1.46E-02 Cs-137 <1.17E-02 0.00E+00 1.17E-02 Be-7 <1.02E-01 0.00E+00 1.02E-01 K-40 <4.05E-01 0.00E+00 4.05E-01 Sample ID: 237975 Sample Dates: 6/18/2012 - 6/25/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.02E-02 0.00E+00 1.02E-02 Cs-134 <1.11E-02 0.00E+00 1.11E-02 Cs-137 <1.48E-02 0.00E+00 1.48E-02 Be-7 <5.84E-02 0.00E+00 5.84E-02 K-40 <3.87E-01 0.00E+00 3.87E-01 Sample ID: 238727 Sample Dates: 6/25/2012 - 7/2/2012 Nuclide Activity 1 Sigma Error LLD I-131 <6.90E-03 0.00E+00 6.90E-03 Cs-134 <8.85E-03 0.00E+00 8.85E-03 Cs-137 <1.24E-02 0.00E+00 1.24E-02 Be-7 <6.38E-02 0.00E+00 6.38E-02 K-40 7.15E-01 9.31E-02 8.91E-02 Sample ID: 239104 Sample Dates: 7/2/2012 - 7/9/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.13E-03 0.00E+00 8.13E-03 Cs-134 <6.46E-03 0.00E+00 6.46E-03 Cs-137 <1.13E-02 0.00E+00 1.13E-02 Be-7 <8.18E-02 0.00E+00 8.18E-02 K-40 4.14E-01 7.44E-02 1.41E-01 Sample ID: 239876 Sample Dates: 7/9/2012 - 7/16/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.08E-03 0.00E+00 7.08E-03 Cs-134 <7.97E-03 0.00E+00 7.97E-03 Cs-137 <1.30E-02 0.00E+00 1.30E-02 Be-7 <7.18E-02 0.00E+00 7.18E-02 K-40 2.92E-01 7.74E-02 1.23E-01 Sample ID: 240000 Sample Dates: 7/16/2012 - 7/23/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.26E-02 0.00E+00 1.26E-02 Cs-134 <1.18E-02 0.00E+00 1.18E-02 Cs-137 <1.86E-02 0.00E+00 1.86E-02 Be-7 <1.11E-01 0.00E+00 1.11E-01 K-40 3.43E-01 8.86E-02 6.19E-02 Sample ID: 240322 Sample Dates: 7/23/2012 - 7/30/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.32E-03 0.00E+00 9.32E-03 Cs-134 <1.11E-02 0.00E+00 1.11E-02 Cs-137 <1.29E-02 0.00E+00 1.29E-02 Be-7 <8.97E-02 0.00E+00 8.97E-02 K-40 5.38E-01 8.41E-02 1.18E-01 Sample ID: 240957 Sample Dates: 7/30/2012 - 8/6/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.30E-03 0.00E+00 8.30E-03 Cs-134 <9.35E-03 0.00E+00 9.35E-03 Cs-137 <1.24E-02 0.00E+00 1.24E-02 Be-7 <6.37E-02 0.00E+00 6.37E-02 K-40 3.48E-01 8.20E-02 5.22E-02 Sample ID: 241228 Sample Dates: 8/6/2012 - 8/13/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.07E-03 0.00E+00 9.07E-03 Cs-134 <9.79E-03 0.00E+00 9.79E-03 Cs-137 <1.76E-02 0.00E+00 1.76E-02 Be-7 <1.27E-01 0.00E+00 1.27E-01 K-40 3.94E-01 9.55E-02 1.98E-01 Sample ID: 241535 Sample Dates: 8/13/2012 - 8/20/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.60E-03 0.00E+00 9.60E-03 Cs-134 <1.07E-02 0.00E+00 1.07E-02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 67 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 241535 Sample Dates: 8/13/2012 - 8/20/2012 Nuclide Activity 1 Sigma Error LLD Cs-137 <1.26E-02 0.00E+00 1.26E-02 Be-7 <6.35E-02 0.00E+00 6.35E-02 K-40 2.22E-01 8.19E-02 1.69E-01 Sample ID: 242124 Sample Dates: 8/20/2012 - 8/27/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.09E-03 0.00E+00 8.09E-03 Cs-134 <6.98E-03 0.00E+00 6.98E-03 Cs-137 <1.23E-02 0.00E+00 1.23E-02 Be-7 <6.47E-02 0.00E+00 6.47E-02 K-40 <4.94E-01 0.00E+00 4.94E-01 Sample ID: 242453 Sample Dates: 8/27/2012 - 9/4/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.74E-03 0.00E+00 9.74E-03 Cs-134 <7.11E-03 0.00E+00 7.11E-03 Cs-137 <1.11E-02 0.00E+00 1.11E-02 Be-7 <6.28E-02 0.00E+00 6.28E-02 K-40 4.75E-01 7.94E-02 9.80E-02 Sample ID: 242980 Sample Dates: 9/4/2012 - 9/10/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.49E-02 0.00E+00 1.49E-02 Cs-134 <1.76E-02 0.00E+00 1.76E-02 Cs-137 <1.92E-02 0.00E+00 1.92E-02 Be-7 <6.44E-02 0.00E+00 6.44E-02 K-40 <4.47E-01 0.00E+00 4.47E-01 Sample ID: 243738 Sample Dates: 9/10/2012 - 9/17/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.10E-02 0.00E+00 1.10E-02 Cs-134 <1.50E-02 0.00E+00 1.50E-02 Cs-137 <1.74E-02 0.00E+00 1.74E-02 Be-7 <1.10E-01 0.00E+00 1.10E-01 K-40 <4.67E-01 0.00E+00 4.67E-01 Sample ID: 244143 Sample Dates: 9/17/2012 - 9/24/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.18E-02 0.00E+00 1.18E-02 Cs-134 <1.24E-02 0.00E+00 1.24E-02 Cs-137 <2.24E-02 0.00E+00 2.24E-02 Be-7 <8.33E-02 0.00E+00 8.33E-02 K-40 <3.87E-01 0.00E+00 3.87E-01 Sample ID: 245015 Sample Dates: 9/24/2012 - 10/1/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.19E-03 0.00E+00 8.19E-03 Cs-134 <9.65E-03 0.00E+00 9.65E-03 Cs-137 <9.32E-03 0.00E+00 9.32E-03 Be-7 <7.47E-02 0.00E+00 7.47E-02 K-40 4.69E-01 8.04E-02 1.18E-01 Sample ID: 245835 Sample Dates: 10/1/2012 - 10/8/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.09E-02 0.00E+00 1.09E-02 Cs-134 <9.51E-03 0.00E+00 9.51E-03 Cs-137 <1.27E-02 0.00E+00 1.27E-02 Be-7 <9.47E-02 0.00E+00 9.47E-02 K-40 4.03E-01 7.62E-02 1.06E-01 Sample ID: 246690 Sample Dates: 10/8/2012 - 10/15/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.98E-03 0.00E+00 7.98E-03 Cs-134 <8.60E-03 0.00E+00 8.60E-03 Cs-137 <1.16E-02 0.00E+00 1.16E-02 Be-7 <7.53E-02 0.00E+00 7.53E-02 K-40 <4.71E-01 0.00E+00 4.71E-01 Sample ID: 247098 Sample Dates: 10/15/2012 - 10/22/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.42E-02 0.00E+00 1.42E-02 Cs-134 <1.36E-02 0.00E+00 1.36E-02 Cs-137 <1.24E-02 0.00E+00 1.24E-02 Be-7 <1.05E-01 0.00E+00 1.05E-01 K-40 4.42E-01 1.02E-01 6.30E-02 Sample ID: 247414 Sample Dates: 10/22/2012 - 10/29/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.46E-03 0.00E+00 7.46E-03 Cs-134 <8.24E-03 0.00E+00 8.24E-03 Cs-137 <7.56E-03 0.00E+00 7.56E-03 Be-7 <7.52E-02 0.00E+00 7.52E-02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 68 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 247414 Sample Dates: 10/22/2012 - 10/29/2012 Nuclide Activity 1 Sigma Error LLD K-40 2.74E-01 7.60E-02 5.70E-02 Sample ID: 247752 Sample Dates: 10/29/2012 - 11/5/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.74E-03 0.00E+00 9.74E-03 Cs-134 <1.04E-02 0.00E+00 1.04E-02 Cs-137 <1.07E-02 0.00E+00 1.07E-02 Be-7 <9.95E-02 0.00E+00 9.95E-02 K-40 4.59E-01 7.87E-02 1.18E-01 Sample ID: 247947 Sample Dates: 11/5/2012 - 11/12/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.37E-03 0.00E+00 7.37E-03 Cs-134 <7.44E-03 0.00E+00 7.44E-03 Cs-137 <1.62E-02 0.00E+00 1.62E-02 Be-7 <9.92E-02 0.00E+00 9.92E-02 K-40 <3.41E-01 0.00E+00 3.41E-01 Sample ID: 248351 Sample Dates: 11/12/2012 - 11/19/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.96E-03 0.00E+00 9.96E-03 Cs-134 <8.50E-03 0.00E+00 8.50E-03 Cs-137 <1.60E-02 0.00E+00 1.60E-02 Be-7 <4.38E-02 0.00E+00 4.38E-02 K-40 <3.99E-01 0.00E+00 3.99E-01 Sample ID: 248630 Sample Dates: 11/19/2012 - 11/26/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.29E-03 0.00E+00 8.29E-03 Cs-134 <1.09E-02 0.00E+00 1.09E-02 Cs-137 <9.58E-03 0.00E+00 9.58E-03 Be-7 <8.02E-02 0.00E+00 8.02E-02 K-40 4.87E-01 1.02E-01 1.61E-01 Sample ID: 249003 Sample Dates: 11/26/2012 - 12/3/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.96E-03 0.00E+00 8.96E-03 Cs-134 <7.41E-03 0.00E+00 7.41E-03 Cs-137 <1.25E-02 0.00E+00 1.25E-02 Be-7 <6.24E-02 0.00E+00 6.24E-02 K-40 2.00E-01 7.31E-02 1.49E-01 Sample ID: 249242 Sample Dates: 12/3/2012 - 12/10/2012 Nuclide Activity 1 Sigma Error LLD I-131 <6.36E-03 0.00E+00 6.36E-03 Cs-134 <1.01E-02 0.00E+00 1.01E-02 Cs-137 <1.13E-02 0.00E+00 1.13E-02 Be-7 <7.10E-02 0.00E+00 7.10E-02 K-40 4.50E-01 7.82E-02 3.68E-02 Sample ID: 249440 Sample Dates: 12/10/2012 - 12/17/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.11E-03 0.00E+00 9.11E-03 Cs-134 <4.18E-03 0.00E+00 4.18E-03 Cs-137 <1.30E-02 0.00E+00 1.30E-02 Be-7 <8.13E-02 0.00E+00 8.13E-02 K-40 4.49E-01 9.80E-02 1.53E-01 Sample ID: 249867 Sample Dates: 12/17/2012 - 12/24/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.90E-03 0.00E+00 9.90E-03 Cs-134 <8.61E-03 0.00E+00 8.61E-03 Cs-137 <9.86E-03 0.00E+00 9.86E-03 Be-7 <7.14E-02 0.00E+00 7.14E-02 K-40 4.14E-01 7.56E-02 3.73E-02 Sample ID: 250174 Sample Dates: 12/24/2012 - 12/31/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.09E-02 0.00E+00 1.09E-02 Cs-134 <1.34E-02 0.00E+00 1.34E-02 Cs-137 <1.33E-02 0.00E+00 1.33E-02 Be-7 <8.31E-02 0.00E+00 8.31E-02 K-40 <4.30E-01 0.00E+00 4.30E-01 Sample Point 085 [ INDICATOR - NNW @ 0.88 miles ]

Sample ID: 227244 Sample Dates: 1/3/2012 - 1/9/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.59E-03 0.00E+00 9.59E-03 Cs-134 <1.15E-02 0.00E+00 1.15E-02 Cs-137 <1.32E-02 0.00E+00 1.32E-02 Be-7 <8.26E-02 0.00E+00 8.26E-02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 69 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 227244 Sample Dates: 1/3/2012 - 1/9/2012 Nuclide Activity 1 Sigma Error LLD K-40 7.18E-01 1.15E-01 1.76E-01 Sample ID: 227336 Sample Dates: 1/9/2012 - 1/16/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.24E-03 0.00E+00 8.24E-03 Cs-134 <8.74E-03 0.00E+00 8.74E-03 Cs-137 <1.03E-02 0.00E+00 1.03E-02 Be-7 <7.19E-02 0.00E+00 7.19E-02 K-40 4.14E-01 1.08E-01 2.19E-01 Sample ID: 227547 Sample Dates: 1/16/2012 - 1/23/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.35E-02 0.00E+00 1.35E-02 Cs-134 <9.75E-03 0.00E+00 9.75E-03 Cs-137 <1.65E-02 0.00E+00 1.65E-02 Be-7 <9.50E-02 0.00E+00 9.50E-02 K-40 3.26E-01 8.70E-02 1.76E-01 Sample ID: 227869 Sample Dates: 1/23/2012 - 1/30/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.18E-02 0.00E+00 1.18E-02 Cs-134 <1.48E-02 0.00E+00 1.48E-02 Cs-137 <1.53E-02 0.00E+00 1.53E-02 Be-7 <1.08E-01 0.00E+00 1.08E-01 K-40 2.51E-01 1.02E-01 2.09E-01 Sample ID: 228137 Sample Dates: 1/30/2012 - 2/6/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.08E-02 0.00E+00 1.08E-02 Cs-134 <1.17E-02 0.00E+00 1.17E-02 Cs-137 <9.14E-03 0.00E+00 9.14E-03 Be-7 <7.34E-02 0.00E+00 7.34E-02 K-40 <4.43E-01 0.00E+00 4.43E-01 Sample ID: 229447 Sample Dates: 2/6/2012 - 2/13/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.35E-03 0.00E+00 8.35E-03 Cs-134 <7.18E-03 0.00E+00 7.18E-03 Cs-137 <1.26E-02 0.00E+00 1.26E-02 Be-7 <6.67E-02 0.00E+00 6.67E-02 K-40 6.01E-01 8.49E-02 8.77E-02 Sample ID: 230073 Sample Dates: 2/13/2012 - 2/20/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.15E-03 0.00E+00 8.15E-03 Cs-134 <1.18E-02 0.00E+00 1.18E-02 Cs-137 <1.72E-02 0.00E+00 1.72E-02 Be-7 <7.00E-02 0.00E+00 7.00E-02 K-40 3.34E-01 1.12E-01 1.90E-01 Sample ID: 230748 Sample Dates: 2/20/2012 - 2/27/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.00E-02 0.00E+00 1.00E-02 Cs-134 <1.15E-02 0.00E+00 1.15E-02 Cs-137 <1.65E-02 0.00E+00 1.65E-02 Be-7 <1.10E-01 0.00E+00 1.10E-01 K-40 4.87E-01 1.31E-01 6.28E-02 Sample ID: 230957 Sample Dates: 2/27/2012 - 3/5/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.19E-03 0.00E+00 7.19E-03 Cs-134 <9.80E-03 0.00E+00 9.80E-03 Cs-137 <1.04E-02 0.00E+00 1.04E-02 Be-7 <5.96E-02 0.00E+00 5.96E-02 K-40 6.78E-01 9.56E-02 8.82E-02 Sample ID: 231667 Sample Dates: 3/5/2012 - 3/12/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.95E-03 0.00E+00 9.95E-03 Cs-134 <1.02E-02 0.00E+00 1.02E-02 Cs-137 <1.37E-02 0.00E+00 1.37E-02 Be-7 <4.68E-02 0.00E+00 4.68E-02 K-40 6.98E-01 9.59E-02 9.41E-02 Sample ID: 232481 Sample Dates: 3/12/2012 - 3/19/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.10E-02 0.00E+00 1.10E-02 Cs-134 <1.39E-02 0.00E+00 1.39E-02 Cs-137 <1.42E-02 0.00E+00 1.42E-02 Be-7 <9.56E-02 0.00E+00 9.56E-02 K-40 2.62E-01 1.16E-01 2.40E-01 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 70 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 233321 Sample Dates: 3/19/2012 - 3/26/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.26E-02 0.00E+00 1.26E-02 Cs-134 <9.64E-03 0.00E+00 9.64E-03 Cs-137 <1.44E-02 0.00E+00 1.44E-02 Be-7 <1.11E-01 0.00E+00 1.11E-01 K-40 3.93E-01 9.54E-02 2.42E-01 Sample ID: 233562 Sample Dates: 3/26/2012 - 4/2/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.25E-03 0.00E+00 8.25E-03 Cs-134 <1.01E-02 0.00E+00 1.01E-02 Cs-137 <9.49E-03 0.00E+00 9.49E-03 Be-7 <8.04E-02 0.00E+00 8.04E-02 K-40 3.98E-01 1.03E-01 1.62E-01 Sample ID: 234525 Sample Dates: 4/2/2012 - 4/9/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.22E-03 0.00E+00 9.22E-03 Cs-134 <9.80E-03 0.00E+00 9.80E-03 Cs-137 <1.16E-02 0.00E+00 1.16E-02 Be-7 <1.09E-01 0.00E+00 1.09E-01 K-40 4.92E-01 1.08E-01 6.34E-02 Sample ID: 234911 Sample Dates: 4/9/2012 - 4/16/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.01E-03 0.00E+00 8.01E-03 Cs-134 <9.97E-03 0.00E+00 9.97E-03 Cs-137 <7.83E-03 0.00E+00 7.83E-03 Be-7 <7.51E-02 0.00E+00 7.51E-02 K-40 5.02E-01 9.34E-02 1.16E-01 Sample ID: 235230 Sample Dates: 4/16/2012 - 4/23/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.52E-03 0.00E+00 9.52E-03 Cs-134 <8.10E-03 0.00E+00 8.10E-03 Cs-137 <9.00E-03 0.00E+00 9.00E-03 Be-7 <8.25E-02 0.00E+00 8.25E-02 K-40 6.52E-01 8.78E-02 1.08E-01 Sample ID: 235415 Sample Dates: 4/23/2012 - 4/30/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.00E-02 0.00E+00 1.00E-02 Cs-134 <1.03E-02 0.00E+00 1.03E-02 Cs-137 <1.09E-02 0.00E+00 1.09E-02 Be-7 <7.92E-02 0.00E+00 7.92E-02 K-40 3.62E-01 8.29E-02 1.41E-01 Sample ID: 235753 Sample Dates: 4/30/2012 - 5/7/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.56E-02 0.00E+00 1.56E-02 Cs-134 <1.33E-02 0.00E+00 1.33E-02 Cs-137 <9.39E-03 0.00E+00 9.39E-03 Be-7 <1.12E-01 0.00E+00 1.12E-01 K-40 3.54E-01 9.15E-02 2.13E-01 Sample ID: 235999 Sample Dates: 5/7/2012 - 5/14/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.87E-03 0.00E+00 7.87E-03 Cs-134 <9.68E-03 0.00E+00 9.68E-03 Cs-137 <1.08E-02 0.00E+00 1.08E-02 Be-7 <8.52E-02 0.00E+00 8.52E-02 K-40 4.68E-01 7.90E-02 1.24E-01 Sample ID: 236209 Sample Dates: 5/14/2012 - 5/21/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.65E-03 0.00E+00 9.65E-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 <5.67E-02 0.00E+00 5.67E-02 K-40 4.36E-01 9.99E-02 6.20E-02 Sample ID: 236522 Sample Dates: 5/21/2012 - 5/29/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.86E-03 0.00E+00 7.86E-03 Cs-134 <7.60E-03 0.00E+00 7.60E-03 Cs-137 <1.04E-02 0.00E+00 1.04E-02 Be-7 <7.59E-02 0.00E+00 7.59E-02 K-40 6.31E-01 8.02E-02 1.09E-01 Sample ID: 236821 Sample Dates: 5/29/2012 - 6/4/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.31E-02 0.00E+00 1.31E-02 Cs-134 <2.14E-02 0.00E+00 2.14E-02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 71 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 236821 Sample Dates: 5/29/2012 - 6/4/2012 Nuclide Activity 1 Sigma Error LLD Cs-137 <1.92E-02 0.00E+00 1.92E-02 Be-7 <8.14E-02 0.00E+00 8.14E-02 K-40 4.93E-01 1.16E-01 3.48E-01 Sample ID: 237147 Sample Dates: 6/4/2012 - 6/11/2012 Nuclide Activity 1 Sigma Error LLD I-131 <6.36E-03 0.00E+00 6.36E-03 Cs-134 <1.32E-02 0.00E+00 1.32E-02 Cs-137 <1.56E-02 0.00E+00 1.56E-02 Be-7 <8.05E-02 0.00E+00 8.05E-02 K-40 2.88E-01 7.45E-02 1.42E-01 Sample ID: 237322 Sample Dates: 6/11/2012 - 6/18/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.55E-02 0.00E+00 1.55E-02 Cs-134 <1.79E-02 0.00E+00 1.79E-02 Cs-137 <1.33E-02 0.00E+00 1.33E-02 Be-7 <9.85E-02 0.00E+00 9.85E-02 K-40 3.40E-01 1.12E-01 2.11E-01 Sample ID: 237998 Sample Dates: 6/18/2012 - 6/25/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.16E-03 0.00E+00 7.16E-03 Cs-134 <8.72E-03 0.00E+00 8.72E-03 Cs-137 <1.16E-02 0.00E+00 1.16E-02 Be-7 <5.79E-02 0.00E+00 5.79E-02 K-40 3.00E-01 8.92E-02 1.83E-01 Sample ID: 238750 Sample Dates: 6/25/2012 - 7/2/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.39E-02 0.00E+00 1.39E-02 Cs-134 <1.30E-02 0.00E+00 1.30E-02 Cs-137 <1.12E-02 0.00E+00 1.12E-02 Be-7 <1.41E-01 0.00E+00 1.41E-01 K-40 3.67E-01 1.14E-01 1.80E-01 Sample ID: 239150 Sample Dates: 7/2/2012 - 7/9/2012 Nuclide Activity 1 Sigma Error LLD I-131 <5.09E-03 0.00E+00 5.09E-03 Cs-134 <1.23E-02 0.00E+00 1.23E-02 Cs-137 <1.36E-02 0.00E+00 1.36E-02 Be-7 <6.05E-02 0.00E+00 6.05E-02 K-40 2.14E-01 6.44E-02 5.25E-02 Sample ID: 239902 Sample Dates: 7/9/2012 - 7/16/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.32E-03 0.00E+00 8.32E-03 Cs-134 <7.97E-03 0.00E+00 7.97E-03 Cs-137 <1.21E-02 0.00E+00 1.21E-02 Be-7 <8.15E-02 0.00E+00 8.15E-02 K-40 5.13E-01 8.52E-02 1.52E-01 Sample ID: 240023 Sample Dates: 7/16/2012 - 7/23/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.10E-02 0.00E+00 1.10E-02 Cs-134 <9.86E-03 0.00E+00 9.86E-03 Cs-137 <1.06E-02 0.00E+00 1.06E-02 Be-7 <7.79E-02 0.00E+00 7.79E-02 K-40 <4.44E-01 0.00E+00 4.44E-01 Sample ID: 240357 Sample Dates: 7/23/2012 - 7/30/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.83E-03 0.00E+00 7.83E-03 Cs-134 <1.08E-02 0.00E+00 1.08E-02 Cs-137 <1.24E-02 0.00E+00 1.24E-02 Be-7 <6.87E-02 0.00E+00 6.87E-02 K-40 5.66E-01 8.25E-02 1.03E-01 Sample ID: 240980 Sample Dates: 7/30/2012 - 8/6/2012 Nuclide Activity 1 Sigma Error LLD I-131 <7.93E-03 0.00E+00 7.93E-03 Cs-134 <9.78E-03 0.00E+00 9.78E-03 Cs-137 <1.46E-02 0.00E+00 1.46E-02 Be-7 <5.73E-02 0.00E+00 5.73E-02 K-40 5.77E-01 8.25E-02 3.18E-02 Sample ID: 241251 Sample Dates: 8/6/2012 - 8/13/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.86E-03 0.00E+00 9.86E-03 Cs-134 <1.64E-02 0.00E+00 1.64E-02 Cs-137 <1.17E-02 0.00E+00 1.17E-02 Be-7 <1.02E-01 0.00E+00 1.02E-01 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 72 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 241251 Sample Dates: 8/6/2012 - 8/13/2012 Nuclide Activity 1 Sigma Error LLD K-40 4.11E-01 9.97E-02 6.53E-02 Sample ID: 241558 Sample Dates: 8/13/2012 - 8/20/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.08E-02 0.00E+00 1.08E-02 Cs-134 <1.29E-02 0.00E+00 1.29E-02 Cs-137 <1.18E-02 0.00E+00 1.18E-02 Be-7 <8.58E-02 0.00E+00 8.58E-02 K-40 2.83E-01 8.16E-02 2.21E-01 Sample ID: 242147 Sample Dates: 8/20/2012 - 8/27/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.44E-02 0.00E+00 1.44E-02 Cs-134 <1.56E-02 0.00E+00 1.56E-02 Cs-137 <1.18E-02 0.00E+00 1.18E-02 Be-7 <9.44E-02 0.00E+00 9.44E-02 K-40 4.50E-01 1.03E-01 6.41E-02 Sample ID: 242477 Sample Dates: 8/27/2012 - 9/4/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.83E-03 0.00E+00 9.83E-03 Cs-134 <9.24E-03 0.00E+00 9.24E-03 Cs-137 <1.29E-02 0.00E+00 1.29E-02 Be-7 <5.78E-02 0.00E+00 5.78E-02 K-40 5.37E-01 8.26E-02 1.07E-01 Sample ID: 243003 Sample Dates: 9/4/2012 - 9/10/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.48E-02 0.00E+00 1.48E-02 Cs-134 <1.13E-02 0.00E+00 1.13E-02 Cs-137 <1.96E-02 0.00E+00 1.96E-02 Be-7 <1.30E-01 0.00E+00 1.30E-01 K-40 3.80E-01 1.01E-01 2.05E-01 Sample ID: 243761 Sample Dates: 9/10/2012 - 9/17/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.09E-02 0.00E+00 1.09E-02 Cs-134 <1.51E-02 0.00E+00 1.51E-02 Cs-137 <1.15E-02 0.00E+00 1.15E-02 Be-7 <9.60E-02 0.00E+00 9.60E-02 K-40 <4.88E-01 0.00E+00 4.88E-01 Sample ID: 244166 Sample Dates: 9/17/2012 - 9/24/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.63E-03 0.00E+00 9.63E-03 Cs-134 <1.25E-02 0.00E+00 1.25E-02 Cs-137 <1.42E-02 0.00E+00 1.42E-02 Be-7 <6.86E-02 0.00E+00 6.86E-02 K-40 4.92E-01 8.19E-02 1.22E-01 Sample ID: 245037 Sample Dates: 9/24/2012 - 10/1/2012 Nuclide Activity 1 Sigma Error LLD I-131 <6.81E-03 0.00E+00 6.81E-03 Cs-134 <7.46E-03 0.00E+00 7.46E-03 Cs-137 <7.51E-03 0.00E+00 7.51E-03 Be-7 <5.34E-02 0.00E+00 5.34E-02 K-40 <5.02E-01 0.00E+00 5.02E-01 Sample ID: 245857 Sample Dates: 10/1/2012 - 10/8/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.33E-02 0.00E+00 1.33E-02 Cs-134 <1.56E-02 0.00E+00 1.56E-02 Cs-137 <1.77E-02 0.00E+00 1.77E-02 Be-7 <8.18E-02 0.00E+00 8.18E-02 K-40 <4.25E-01 0.00E+00 4.25E-01 Sample ID: 246712 Sample Dates: 10/8/2012 - 10/15/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.58E-03 0.00E+00 9.58E-03 Cs-134 <1.13E-02 0.00E+00 1.13E-02 Cs-137 <7.58E-03 0.00E+00 7.58E-03 Be-7 <5.56E-02 0.00E+00 5.56E-02 K-40 4.65E-01 9.91E-02 5.71E-02 Sample ID: 247120 Sample Dates: 10/15/2012 - 10/22/2012 Nuclide Activity 1 Sigma Error LLD I-131 <9.81E-03 0.00E+00 9.81E-03 Cs-134 <1.00E-02 0.00E+00 1.00E-02 Cs-137 <1.37E-02 0.00E+00 1.37E-02 Be-7 <5.31E-02 0.00E+00 5.31E-02 K-40 4.16E-01 7.72E-02 1.24E-01 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 73 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 247436 Sample Dates: 10/22/2012 - 10/29/2012 Nuclide Activity 1 Sigma Error LLD I-131 <5.67E-03 0.00E+00 5.67E-03 Cs-134 <4.75E-03 0.00E+00 4.75E-03 Cs-137 <7.33E-03 0.00E+00 7.33E-03 Be-7 <3.96E-02 0.00E+00 3.96E-02 K-40 3.70E-01 7.37E-02 7.58E-02 Sample ID: 247777 Sample Dates: 10/29/2012 - 11/5/2012 Nuclide Activity 1 Sigma Error LLD I-131 <5.12E-03 0.00E+00 5.12E-03 Cs-134 <2.33E-03 0.00E+00 2.33E-03 Cs-137 <1.09E-02 0.00E+00 1.09E-02 Be-7 <8.05E-02 0.00E+00 8.05E-02 K-40 2.16E-01 8.46E-02 1.80E-01 Sample ID: 247969 Sample Dates: 11/5/2012 - 11/12/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.06E-02 0.00E+00 1.06E-02 Cs-134 <1.16E-02 0.00E+00 1.16E-02 Cs-137 <1.25E-02 0.00E+00 1.25E-02 Be-7 <8.87E-02 0.00E+00 8.87E-02 K-40 6.59E-01 9.41E-02 9.64E-02 Sample ID: 248373 Sample Dates: 11/12/2012 - 11/19/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.74E-03 0.00E+00 8.74E-03 Cs-134 <6.67E-03 0.00E+00 6.67E-03 Cs-137 <1.10E-02 0.00E+00 1.10E-02 Be-7 <9.34E-02 0.00E+00 9.34E-02 K-40 3.61E-01 8.76E-02 5.74E-02 Sample ID: 248652 Sample Dates: 11/19/2012 - 11/26/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.18E-02 0.00E+00 1.18E-02 Cs-134 <1.78E-02 0.00E+00 1.78E-02 Cs-137 <1.58E-02 0.00E+00 1.58E-02 Be-7 <9.89E-02 0.00E+00 9.89E-02 K-40 <4.88E-01 0.00E+00 4.88E-01 Sample ID: 249039 Sample Dates: 11/26/2012 - 12/3/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.13E-02 0.00E+00 1.13E-02 Cs-134 <1.21E-02 0.00E+00 1.21E-02 Cs-137 <1.57E-02 0.00E+00 1.57E-02 Be-7 <9.89E-02 0.00E+00 9.89E-02 K-40 2.40E-01 7.24E-02 1.87E-01 Sample ID: 249264 Sample Dates: 12/3/2012 - 12/10/2012 Nuclide Activity 1 Sigma Error LLD I-131 <5.80E-03 0.00E+00 5.80E-03 Cs-134 <1.32E-02 0.00E+00 1.32E-02 Cs-137 <1.45E-02 0.00E+00 1.45E-02 Be-7 <1.00E-01 0.00E+00 1.00E-01 K-40 2.59E-01 7.48E-02 5.84E-02 Sample ID: 249462 Sample Dates: 12/10/2012 - 12/17/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.46E-03 0.00E+00 8.46E-03 Cs-134 <7.24E-03 0.00E+00 7.24E-03 Cs-137 <1.18E-02 0.00E+00 1.18E-02 Be-7 <8.14E-02 0.00E+00 8.14E-02 K-40 3.43E-01 8.57E-02 5.79E-02 Sample ID: 249889 Sample Dates: 12/17/2012 - 12/24/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.45E-02 0.00E+00 1.45E-02 Cs-134 <1.23E-02 0.00E+00 1.23E-02 Cs-137 <1.58E-02 0.00E+00 1.58E-02 Be-7 <1.04E-01 0.00E+00 1.04E-01 K-40 <3.88E-01 0.00E+00 3.88E-01 Sample ID: 250196 Sample Dates: 12/24/2012 - 12/31/2012 Nuclide Activity 1 Sigma Error LLD I-131 <8.40E-03 0.00E+00 8.40E-03 Cs-134 <1.12E-02 0.00E+00 1.12E-02 Cs-137 <7.60E-03 0.00E+00 7.60E-03 Be-7 <8.45E-02 0.00E+00 8.45E-02 K-40 <3.18E-01 0.00E+00 3.18E-01 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 74 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 227343 Sample Dates: 12/12/2011 - 1/9/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.03E+00 3.86E-01 1.23E+00 Mn-54 <3.95E+00 0.00E+00 3.95E+00 Co-58 <4.97E+00 0.00E+00 4.97E+00 Fe-59 <1.13E+01 0.00E+00 1.13E+01 Co-60 <6.22E+00 0.00E+00 6.22E+00 Zn-65 <7.94E+00 0.00E+00 7.94E+00 Zr-95 <5.22E+00 0.00E+00 5.22E+00 Nb-95 <3.84E+00 0.00E+00 3.84E+00 I-131 <5.15E+00 0.00E+00 5.15E+00 Cs-134 <4.10E+00 0.00E+00 4.10E+00 Cs-137 <4.91E+00 0.00E+00 4.91E+00 BaLa-140 <5.41E+00 0.00E+00 5.41E+00 Be-7 <4.15E+01 0.00E+00 4.15E+01 K-40 <9.79E+01 0.00E+00 9.79E+01 Sample ID: 229454 Sample Dates: 1/9/2012 - 2/6/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.52E+00 3.55E-01 1.08E+00 Mn-54 <8.46E+00 0.00E+00 8.46E+00 Co-58 <6.13E+00 0.00E+00 6.13E+00 Fe-59 <1.67E+01 0.00E+00 1.67E+01 Co-60 <7.25E+00 0.00E+00 7.25E+00 Zn-65 <1.31E+01 0.00E+00 1.31E+01 Zr-95 <1.22E+01 0.00E+00 1.22E+01 Nb-95 <5.96E+00 0.00E+00 5.96E+00 I-131 <7.10E+00 0.00E+00 7.10E+00 Cs-134 <6.92E+00 0.00E+00 6.92E+00 Cs-137 <7.66E+00 0.00E+00 7.66E+00 BaLa-140 <1.22E+01 0.00E+00 1.22E+01 Be-7 <6.59E+01 0.00E+00 6.59E+01 K-40 1.65E+02 3.69E+01 5.89E+01 Sample ID: 231151 Sample Dates: 12/12/2011 - 3/5/2012 Nuclide Activity 1 Sigma Error LLD H3DW <4.49E+00 0.00E+00 1.72E+02 Sample ID: 231674 Sample Dates: 2/6/2012 - 3/5/2012 Nuclide Activity 1 Sigma Error LLD Beta <-9.7E-02 0.00E+00 1.23E+00 Mn-54 <6.71E+00 0.00E+00 6.71E+00 Co-58 <7.89E+00 0.00E+00 7.89E+00 Fe-59 <1.38E+01 0.00E+00 1.38E+01 Co-60 <1.03E+01 0.00E+00 1.03E+01 Zn-65 <1.83E+01 0.00E+00 1.83E+01 Zr-95 <1.03E+01 0.00E+00 1.03E+01 Nb-95 <8.16E+00 0.00E+00 8.16E+00 I-131 <7.04E+00 0.00E+00 7.04E+00 Cs-134 <7.44E+00 0.00E+00 7.44E+00 Cs-137 <7.25E+00 0.00E+00 7.25E+00 BaLa-140 <7.16E+00 0.00E+00 7.16E+00 Be-7 <4.88E+01 0.00E+00 4.88E+01 K-40 7.41E+01 3.05E+01 5.46E+01 Sample ID: 234532 Sample Dates: 3/5/2012 - 4/2/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.51E+00 3.66E-01 1.13E+00 Mn-54 <5.88E+00 0.00E+00 5.88E+00 Co-58 <6.56E+00 0.00E+00 6.56E+00 Fe-59 <3.11E+00 0.00E+00 3.11E+00 Co-60 <8.80E+00 0.00E+00 8.80E+00 Zn-65 <1.14E+01 0.00E+00 1.14E+01 Zr-95 <1.05E+01 0.00E+00 1.05E+01 Nb-95 <6.87E+00 0.00E+00 6.87E+00 I-131 <6.88E+00 0.00E+00 6.88E+00 Cs-134 <5.46E+00 0.00E+00 5.46E+00 Cs-137 <5.83E+00 0.00E+00 5.83E+00 BaLa-140 <2.63E+00 0.00E+00 2.63E+00 Be-7 <3.54E+01 0.00E+00 3.54E+01 K-40 <1.12E+02 0.00E+00 1.12E+02 Sample ID: 235760 Sample Dates: 4/2/2012 - 4/30/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.32E+00 3.66E-01 1.14E+00 Mn-54 <4.10E+00 0.00E+00 4.10E+00 Co-58 <4.02E+00 0.00E+00 4.02E+00 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 75 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 235760 Sample Dates: 4/2/2012 - 4/30/2012 Nuclide Activity 1 Sigma Error LLD Fe-59 <9.68E+00 0.00E+00 9.68E+00 Co-60 <5.92E+00 0.00E+00 5.92E+00 Zn-65 <1.07E+01 0.00E+00 1.07E+01 Zr-95 <9.02E+00 0.00E+00 9.02E+00 Nb-95 <5.20E+00 0.00E+00 5.20E+00 I-131 <4.93E+00 0.00E+00 4.93E+00 Cs-134 <5.56E+00 0.00E+00 5.56E+00 Cs-137 <5.12E+00 0.00E+00 5.12E+00 BaLa-140 <4.68E+00 0.00E+00 4.68E+00 Be-7 <4.45E+01 0.00E+00 4.45E+01 K-40 2.10E+02 3.23E+01 5.91E+01 Sample ID: 236828 Sample Dates: 4/30/2012 - 5/29/2012 Nuclide Activity 1 Sigma Error LLD Beta 8.33E-01 3.72E-01 1.21E+00 Mn-54 <3.77E+00 0.00E+00 3.77E+00 Co-58 <6.70E+00 0.00E+00 6.70E+00 Fe-59 <1.25E+01 0.00E+00 1.25E+01 Co-60 <8.14E+00 0.00E+00 8.14E+00 Zn-65 <1.44E+01 0.00E+00 1.44E+01 Zr-95 <1.07E+01 0.00E+00 1.07E+01 Nb-95 <4.64E+00 0.00E+00 4.64E+00 I-131 <7.45E+00 0.00E+00 7.45E+00 Cs-134 <6.01E+00 0.00E+00 6.01E+00 Cs-137 <8.36E+00 0.00E+00 8.36E+00 BaLa-140 <7.16E+00 0.00E+00 7.16E+00 Be-7 <3.50E+01 0.00E+00 3.50E+01 K-40 <9.81E+01 0.00E+00 9.81E+01 Sample ID: 236891 Sample Dates: 3/5/2012 - 5/29/2012 Nuclide Activity 1 Sigma Error LLD H3DW <1.55E+01 0.00E+00 1.72E+02 Sample ID: 238757 Sample Dates: 5/29/2012 - 6/25/2012 Nuclide Activity 1 Sigma Error LLD Beta 9.80E-01 3.71E-01 1.19E+00 Mn-54 <7.67E+00 0.00E+00 7.67E+00 Co-58 <6.06E+00 0.00E+00 6.06E+00 Fe-59 <1.65E+01 0.00E+00 1.65E+01 Co-60 <1.09E+01 0.00E+00 1.09E+01 Zn-65 <1.18E+01 0.00E+00 1.18E+01 Zr-95 <9.10E+00 0.00E+00 9.10E+00 Nb-95 <7.26E+00 0.00E+00 7.26E+00 I-131 <6.88E+00 0.00E+00 6.88E+00 Cs-134 <6.85E+00 0.00E+00 6.85E+00 Cs-137 <8.65E+00 0.00E+00 8.65E+00 BaLa-140 <2.68E+00 0.00E+00 2.68E+00 Be-7 <5.23E+01 0.00E+00 5.23E+01 K-40 <1.43E+02 0.00E+00 1.43E+02 Sample ID: 240364 Sample Dates: 6/25/2012 - 7/23/2012 Nuclide Activity 1 Sigma Error LLD Beta <2.71E-01 0.00E+00 1.33E+00 Mn-54 <5.60E+00 0.00E+00 5.60E+00 Co-58 <6.17E+00 0.00E+00 6.17E+00 Fe-59 <1.24E+01 0.00E+00 1.24E+01 Co-60 <1.03E+01 0.00E+00 1.03E+01 Zn-65 <1.36E+01 0.00E+00 1.36E+01 Zr-95 <1.04E+01 0.00E+00 1.04E+01 Nb-95 <6.46E+00 0.00E+00 6.46E+00 I-131 <5.22E+00 0.00E+00 5.22E+00 Cs-134 <6.22E+00 0.00E+00 6.22E+00 Cs-137 <6.38E+00 0.00E+00 6.38E+00 BaLa-140 <9.05E+00 0.00E+00 9.05E+00 Be-7 <4.39E+01 0.00E+00 4.39E+01 K-40 <1.04E+02 0.00E+00 1.04E+02 Sample ID: 242154 Sample Dates: 7/23/2012 - 8/20/2012 Nuclide Activity 1 Sigma Error LLD Beta <-1.2E-02 0.00E+00 1.32E+00 Mn-54 <6.35E+00 0.00E+00 6.35E+00 Co-58 <4.78E+00 0.00E+00 4.78E+00 Fe-59 <8.61E+00 0.00E+00 8.61E+00 Co-60 <9.72E+00 0.00E+00 9.72E+00 Zn-65 <1.38E+01 0.00E+00 1.38E+01 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 76 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 242154 Sample Dates: 7/23/2012 - 8/20/2012 Nuclide Activity 1 Sigma Error LLD Zr-95 <1.28E+01 0.00E+00 1.28E+01 Nb-95 <6.83E+00 0.00E+00 6.83E+00 I-131 <5.02E+00 0.00E+00 5.02E+00 Cs-134 <6.31E+00 0.00E+00 6.31E+00 Cs-137 <6.43E+00 0.00E+00 6.43E+00 BaLa-140 <7.41E+00 0.00E+00 7.41E+00 Be-7 <5.99E+01 0.00E+00 5.99E+01 K-40 <9.04E+01 0.00E+00 9.04E+01 Sample ID: 242489 Sample Dates: 5/29/2012 - 8/20/2012 Nuclide Activity 1 Sigma Error LLD H3DW <8.98E+01 0.00E+00 1.72E+02 Sample ID: 244173 Sample Dates: 8/20/2012 - 9/17/2012 Nuclide Activity 1 Sigma Error LLD Beta <5.76E-01 0.00E+00 1.28E+00 Mn-54 <4.45E+00 0.00E+00 4.45E+00 Co-58 <5.14E+00 0.00E+00 5.14E+00 Fe-59 <9.09E+00 0.00E+00 9.09E+00 Co-60 <5.84E+00 0.00E+00 5.84E+00 Zn-65 <9.76E+00 0.00E+00 9.76E+00 Zr-95 <7.07E+00 0.00E+00 7.07E+00 Nb-95 <5.87E+00 0.00E+00 5.87E+00 I-131 <6.42E+00 0.00E+00 6.42E+00 Cs-134 <4.21E+00 0.00E+00 4.21E+00 Cs-137 <4.93E+00 0.00E+00 4.93E+00 BaLa-140 <6.64E+00 0.00E+00 6.64E+00 Be-7 <4.67E+01 0.00E+00 4.67E+01 K-40 1.54E+02 2.80E+01 4.36E+01 Sample ID: 247128 Sample Dates: 9/17/2012 - 10/15/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.13E+00 4.03E-01 1.29E+00 Mn-54 <5.98E+00 0.00E+00 5.98E+00 Co-58 <2.94E+00 0.00E+00 2.94E+00 Fe-59 <1.62E+01 0.00E+00 1.62E+01 Co-60 <1.20E+01 0.00E+00 1.20E+01 Zn-65 <1.43E+01 0.00E+00 1.43E+01 Zr-95 <1.04E+01 0.00E+00 1.04E+01 Nb-95 <6.18E+00 0.00E+00 6.18E+00 I-131 <7.54E+00 0.00E+00 7.54E+00 Cs-134 <6.83E+00 0.00E+00 6.83E+00 Cs-137 <8.26E+00 0.00E+00 8.26E+00 BaLa-140 <1.39E+01 0.00E+00 1.39E+01 Be-7 <5.06E+01 0.00E+00 5.06E+01 K-40 <1.53E+02 0.00E+00 1.53E+02 Sample ID: 248380 Sample Dates: 10/15/2012 - 11/12/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.09E+00 3.82E-01 1.22E+00 Mn-54 <6.64E+00 0.00E+00 6.64E+00 Co-58 <6.01E+00 0.00E+00 6.01E+00 Fe-59 <1.15E+01 0.00E+00 1.15E+01 Co-60 <9.39E+00 0.00E+00 9.39E+00 Zn-65 <1.78E+01 0.00E+00 1.78E+01 Zr-95 <1.37E+01 0.00E+00 1.37E+01 Nb-95 <8.09E+00 0.00E+00 8.09E+00 I-131 <6.88E+00 0.00E+00 6.88E+00 Cs-134 <5.40E+00 0.00E+00 5.40E+00 Cs-137 <7.20E+00 0.00E+00 7.20E+00 BaLa-140 <1.08E+01 0.00E+00 1.08E+01 Be-7 <5.52E+01 0.00E+00 5.52E+01 K-40 <1.12E+02 0.00E+00 1.12E+02 Sample ID: 249031 Sample Dates: 11/12/2012 - 12/10/2012 Nuclide Activity 1 Sigma Error LLD Beta <-1.4E-01 0.00E+00 1.44E+00 Mn-54 <4.28E+00 0.00E+00 4.28E+00 Co-58 <5.36E+00 0.00E+00 5.36E+00 Fe-59 <7.68E+00 0.00E+00 7.68E+00 Co-60 <7.44E+00 0.00E+00 7.44E+00 Zn-65 <1.11E+01 0.00E+00 1.11E+01 Zr-95 <6.20E+00 0.00E+00 6.20E+00 Nb-95 <4.82E+00 0.00E+00 4.82E+00 I-131 <4.63E+00 0.00E+00 4.63E+00 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 77 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 249031 Sample Dates: 11/12/2012 - 12/10/2012 Nuclide Activity 1 Sigma Error LLD Cs-134 <5.16E+00 0.00E+00 5.16E+00 Cs-137 <5.22E+00 0.00E+00 5.22E+00 BaLa-140 <7.89E+00 0.00E+00 7.89E+00 Be-7 <4.05E+01 0.00E+00 4.05E+01 K-40 <1.02E+02 0.00E+00 1.02E+02 Sample ID: 249469 Sample Dates: 8/20/2012 - 12/10/2012 Nuclide Activity 1 Sigma Error LLD H3DW <3.94E+01 0.00E+00 1.78E+02 Sample Point 064 [ CONTROL - SSW @ 6.67 miles ]

Sample ID: 227344 Sample Dates: 12/12/2011 - 1/9/2012 Nuclide Activity 1 Sigma Error LLD Beta 8.54E-01 3.82E-01 1.23E+00 Mn-54 <4.46E+00 0.00E+00 4.46E+00 Co-58 <3.37E+00 0.00E+00 3.37E+00 Fe-59 <1.04E+01 0.00E+00 1.04E+01 Co-60 <6.84E+00 0.00E+00 6.84E+00 Zn-65 <9.62E+00 0.00E+00 9.62E+00 Zr-95 <6.62E+00 0.00E+00 6.62E+00 Nb-95 <4.55E+00 0.00E+00 4.55E+00 I-131 <5.59E+00 0.00E+00 5.59E+00 Cs-134 <4.81E+00 0.00E+00 4.81E+00 Cs-137 <5.28E+00 0.00E+00 5.28E+00 BaLa-140 <6.24E+00 0.00E+00 6.24E+00 Be-7 <3.82E+01 0.00E+00 3.82E+01 K-40 <1.14E+02 0.00E+00 1.14E+02 Sample ID: 229455 Sample Dates: 1/9/2012 - 2/6/2012 Nuclide Activity 1 Sigma Error LLD Beta 7.58E-01 3.35E-01 1.08E+00 Mn-54 <4.74E+00 0.00E+00 4.74E+00 Co-58 <6.03E+00 0.00E+00 6.03E+00 Fe-59 <1.61E+01 0.00E+00 1.61E+01 Co-60 <8.99E+00 0.00E+00 8.99E+00 Zn-65 <1.35E+01 0.00E+00 1.35E+01 Zr-95 <7.80E+00 0.00E+00 7.80E+00 Nb-95 <7.84E+00 0.00E+00 7.84E+00 I-131 <5.35E+00 0.00E+00 5.35E+00 Cs-134 <5.42E+00 0.00E+00 5.42E+00 Cs-137 <7.08E+00 0.00E+00 7.08E+00 BaLa-140 <1.13E+01 0.00E+00 1.13E+01 Be-7 <4.74E+01 0.00E+00 4.74E+01 K-40 <1.03E+02 0.00E+00 1.03E+02 Sample ID: 231152 Sample Dates: 12/12/2011 - 3/5/2012 Nuclide Activity 1 Sigma Error LLD H3DW <6.93E+00 0.00E+00 1.77E+02 Sample ID: 231675 Sample Dates: 2/6/2012 - 3/5/2012 Nuclide Activity 1 Sigma Error LLD Beta 6.31E-01 3.73E-01 1.23E+00 Mn-54 <4.26E+00 0.00E+00 4.26E+00 Co-58 <4.02E+00 0.00E+00 4.02E+00 Fe-59 <9.93E+00 0.00E+00 9.93E+00 Co-60 <6.43E+00 0.00E+00 6.43E+00 Zn-65 <1.26E+01 0.00E+00 1.26E+01 Zr-95 <7.74E+00 0.00E+00 7.74E+00 Nb-95 <5.38E+00 0.00E+00 5.38E+00 I-131 <6.56E+00 0.00E+00 6.56E+00 Cs-134 <4.78E+00 0.00E+00 4.78E+00 Cs-137 <4.34E+00 0.00E+00 4.34E+00 BaLa-140 <7.47E+00 0.00E+00 7.47E+00 Be-7 <3.80E+01 0.00E+00 3.80E+01 K-40 1.46E+02 2.91E+01 3.97E+01 Sample ID: 234533 Sample Dates: 3/5/2012 - 4/2/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.46E+00 3.65E-01 1.12E+00 Mn-54 <4.12E+00 0.00E+00 4.12E+00 Co-58 <4.27E+00 0.00E+00 4.27E+00 Fe-59 <7.45E+00 0.00E+00 7.45E+00 Co-60 <5.57E+00 0.00E+00 5.57E+00 Zn-65 <1.30E+01 0.00E+00 1.30E+01 Zr-95 <6.90E+00 0.00E+00 6.90E+00 Nb-95 <4.64E+00 0.00E+00 4.64E+00 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 78 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 234533 Sample Dates: 3/5/2012 - 4/2/2012 Nuclide Activity 1 Sigma Error LLD I-131 <5.13E+00 0.00E+00 5.13E+00 Cs-134 <4.24E+00 0.00E+00 4.24E+00 Cs-137 <5.59E+00 0.00E+00 5.59E+00 BaLa-140 <7.89E+00 0.00E+00 7.89E+00 Be-7 <3.30E+01 0.00E+00 3.30E+01 K-40 1.67E+02 2.51E+01 3.94E+01 Sample ID: 235761 Sample Dates: 4/2/2012 - 4/30/2012 Nuclide Activity 1 Sigma Error LLD Beta 8.39E-01 3.54E-01 1.14E+00 Mn-54 <7.82E+00 0.00E+00 7.82E+00 Co-58 <6.47E+00 0.00E+00 6.47E+00 Fe-59 <1.06E+01 0.00E+00 1.06E+01 Co-60 <6.89E+00 0.00E+00 6.89E+00 Zn-65 <1.74E+01 0.00E+00 1.74E+01 Zr-95 <8.97E+00 0.00E+00 8.97E+00 Nb-95 <4.24E+00 0.00E+00 4.24E+00 I-131 <6.93E+00 0.00E+00 6.93E+00 Cs-134 <8.34E+00 0.00E+00 8.34E+00 Cs-137 <7.75E+00 0.00E+00 7.75E+00 BaLa-140 <9.24E+00 0.00E+00 9.24E+00 Be-7 <4.09E+01 0.00E+00 4.09E+01 K-40 <1.12E+02 0.00E+00 1.12E+02 Sample ID: 236829 Sample Dates: 4/30/2012 - 5/29/2012 Nuclide Activity 1 Sigma Error LLD Beta 9.69E-01 3.76E-01 1.21E+00 Mn-54 <4.78E+00 0.00E+00 4.78E+00 Co-58 <4.22E+00 0.00E+00 4.22E+00 Fe-59 <7.21E+00 0.00E+00 7.21E+00 Co-60 <5.59E+00 0.00E+00 5.59E+00 Zn-65 <1.02E+01 0.00E+00 1.02E+01 Zr-95 <7.33E+00 0.00E+00 7.33E+00 Nb-95 <6.43E+00 0.00E+00 6.43E+00 I-131 <5.07E+00 0.00E+00 5.07E+00 Cs-134 <4.13E+00 0.00E+00 4.13E+00 Cs-137 <5.80E+00 0.00E+00 5.80E+00 BaLa-140 <7.13E+00 0.00E+00 7.13E+00 Be-7 <4.45E+01 0.00E+00 4.45E+01 K-40 1.50E+02 3.28E+01 4.38E+01 Sample ID: 236892 Sample Dates: 3/5/2012 - 5/29/2012 Nuclide Activity 1 Sigma Error LLD H3DW <-3.8E+01 0.00E+00 1.71E+02 Sample ID: 238758 Sample Dates: 5/29/2012 - 6/25/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.35E+00 3.80E-01 1.19E+00 Mn-54 <6.15E+00 0.00E+00 6.15E+00 Co-58 <6.21E+00 0.00E+00 6.21E+00 Fe-59 <1.26E+01 0.00E+00 1.26E+01 Co-60 <1.24E+01 0.00E+00 1.24E+01 Zn-65 <1.39E+01 0.00E+00 1.39E+01 Zr-95 <1.04E+01 0.00E+00 1.04E+01 Nb-95 <5.23E+00 0.00E+00 5.23E+00 I-131 <5.25E+00 0.00E+00 5.25E+00 Cs-134 <7.91E+00 0.00E+00 7.91E+00 Cs-137 <9.59E+00 0.00E+00 9.59E+00 BaLa-140 <2.64E+00 0.00E+00 2.64E+00 Be-7 <5.81E+01 0.00E+00 5.81E+01 K-40 <1.16E+02 0.00E+00 1.16E+02 Sample ID: 240365 Sample Dates: 6/25/2012 - 7/23/2012 Nuclide Activity 1 Sigma Error LLD Beta 9.93E-01 4.09E-01 1.33E+00 Mn-54 <6.06E+00 0.00E+00 6.06E+00 Co-58 <5.86E+00 0.00E+00 5.86E+00 Fe-59 <8.54E+00 0.00E+00 8.54E+00 Co-60 <8.91E+00 0.00E+00 8.91E+00 Zn-65 <1.71E+01 0.00E+00 1.71E+01 Zr-95 <1.18E+01 0.00E+00 1.18E+01 Nb-95 <4.80E+00 0.00E+00 4.80E+00 I-131 <7.82E+00 0.00E+00 7.82E+00 Cs-134 <4.82E+00 0.00E+00 4.82E+00 Cs-137 <7.68E+00 0.00E+00 7.68E+00 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 79 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 240365 Sample Dates: 6/25/2012 - 7/23/2012 Nuclide Activity 1 Sigma Error LLD BaLa-140 <1.05E+01 0.00E+00 1.05E+01 Be-7 <5.81E+01 0.00E+00 5.81E+01 K-40 <1.24E+02 0.00E+00 1.24E+02 Sample ID: 242155 Sample Dates: 7/23/2012 - 8/20/2012 Nuclide Activity 1 Sigma Error LLD Beta 9.03E-01 4.07E-01 1.32E+00 Mn-54 <5.01E+00 0.00E+00 5.01E+00 Co-58 <3.35E+00 0.00E+00 3.35E+00 Fe-59 <8.20E+00 0.00E+00 8.20E+00 Co-60 <7.25E+00 0.00E+00 7.25E+00 Zn-65 <1.28E+01 0.00E+00 1.28E+01 Zr-95 <1.02E+01 0.00E+00 1.02E+01 Nb-95 <5.55E+00 0.00E+00 5.55E+00 I-131 <5.78E+00 0.00E+00 5.78E+00 Cs-134 <5.16E+00 0.00E+00 5.16E+00 Cs-137 <5.27E+00 0.00E+00 5.27E+00 BaLa-140 <4.68E+00 0.00E+00 4.68E+00 Be-7 <4.12E+01 0.00E+00 4.12E+01 K-40 1.11E+02 2.45E+01 4.18E+01 Sample ID: 242490 Sample Dates: 5/29/2012 - 8/20/2012 Nuclide Activity 1 Sigma Error LLD H3DW <2.25E+00 0.00E+00 1.73E+02 Sample ID: 244174 Sample Dates: 8/20/2012 - 9/17/2012 Nuclide Activity 1 Sigma Error LLD Beta 6.64E-01 3.88E-01 1.28E+00 Mn-54 <5.62E+00 0.00E+00 5.62E+00 Co-58 <4.78E+00 0.00E+00 4.78E+00 Fe-59 <7.43E+00 0.00E+00 7.43E+00 Co-60 <6.76E+00 0.00E+00 6.76E+00 Zn-65 <1.06E+01 0.00E+00 1.06E+01 Zr-95 <8.45E+00 0.00E+00 8.45E+00 Nb-95 <4.14E+00 0.00E+00 4.14E+00 I-131 <4.87E+00 0.00E+00 4.87E+00 Cs-134 <4.26E+00 0.00E+00 4.26E+00 Cs-137 <6.13E+00 0.00E+00 6.13E+00 BaLa-140 <6.25E+00 0.00E+00 6.25E+00 Be-7 <3.56E+01 0.00E+00 3.56E+01 K-40 1.10E+02 2.67E+01 4.96E+01 Sample ID: 247129 Sample Dates: 9/17/2012 - 10/15/2012 Nuclide Activity 1 Sigma Error LLD Beta 7.40E-01 3.94E-01 1.29E+00 Mn-54 <7.60E+00 0.00E+00 7.60E+00 Co-58 <6.74E+00 0.00E+00 6.74E+00 Fe-59 <1.15E+01 0.00E+00 1.15E+01 Co-60 <1.10E+01 0.00E+00 1.10E+01 Zn-65 <1.80E+01 0.00E+00 1.80E+01 Zr-95 <1.27E+01 0.00E+00 1.27E+01 Nb-95 <8.45E+00 0.00E+00 8.45E+00 I-131 <8.53E+00 0.00E+00 8.53E+00 Cs-134 <7.73E+00 0.00E+00 7.73E+00 Cs-137 <9.34E+00 0.00E+00 9.34E+00 BaLa-140 <1.02E+01 0.00E+00 1.02E+01 Be-7 <6.51E+01 0.00E+00 6.51E+01 K-40 1.06E+02 3.81E+01 6.91E+01 Sample ID: 248381 Sample Dates: 10/15/2012 - 11/12/2012 Nuclide Activity 1 Sigma Error LLD Beta <4.66E-01 0.00E+00 1.22E+00 Mn-54 <6.97E+00 0.00E+00 6.97E+00 Co-58 <5.19E+00 0.00E+00 5.19E+00 Fe-59 <9.14E+00 0.00E+00 9.14E+00 Co-60 <8.04E+00 0.00E+00 8.04E+00 Zn-65 <1.38E+01 0.00E+00 1.38E+01 Zr-95 <1.04E+01 0.00E+00 1.04E+01 Nb-95 <7.81E+00 0.00E+00 7.81E+00 I-131 <6.64E+00 0.00E+00 6.64E+00 Cs-134 <7.25E+00 0.00E+00 7.25E+00 Cs-137 <7.07E+00 0.00E+00 7.07E+00 BaLa-140 <9.32E+00 0.00E+00 9.32E+00 Be-7 <6.83E+01 0.00E+00 6.83E+01 K-40 <9.87E+01 0.00E+00 9.87E+01 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 80 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 249032 Sample Dates: 11/12/2012 - 12/10/2012 Nuclide Activity 1 Sigma Error LLD Beta <-6.8E-01 0.00E+00 1.44E+00 Mn-54 <4.92E+00 0.00E+00 4.92E+00 Co-58 <4.90E+00 0.00E+00 4.90E+00 Fe-59 <1.55E+01 0.00E+00 1.55E+01 Co-60 <1.02E+01 0.00E+00 1.02E+01 Zn-65 <2.09E+01 0.00E+00 2.09E+01 Zr-95 <1.28E+01 0.00E+00 1.28E+01 Nb-95 <1.01E+01 0.00E+00 1.01E+01 I-131 <7.90E+00 0.00E+00 7.90E+00 Cs-134 <8.06E+00 0.00E+00 8.06E+00 Cs-137 <9.66E+00 0.00E+00 9.66E+00 BaLa-140 <7.49E+00 0.00E+00 7.49E+00 Be-7 <6.31E+01 0.00E+00 6.31E+01 K-40 <1.21E+02 0.00E+00 1.21E+02 Sample ID: 249470 Sample Dates: 8/20/2012 - 12/10/2012 Nuclide Activity 1 Sigma Error LLD H3DW <2.32E+01 0.00E+00 1.78E+02 Sample Point 066 [ INDICATOR - SSE @ 18.9 miles ]

Sample ID: 227345 Sample Dates: 12/12/2011 - 1/9/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.61E+00 4.00E-01 1.24E+00 Mn-54 <3.94E+00 0.00E+00 3.94E+00 Co-58 <5.60E+00 0.00E+00 5.60E+00 Fe-59 <8.01E+00 0.00E+00 8.01E+00 Co-60 <6.07E+00 0.00E+00 6.07E+00 Zn-65 <2.05E+00 0.00E+00 2.05E+00 Zr-95 <7.44E+00 0.00E+00 7.44E+00 Nb-95 <4.82E+00 0.00E+00 4.82E+00 I-131 <5.84E+00 0.00E+00 5.84E+00 Cs-134 <4.42E+00 0.00E+00 4.42E+00 Cs-137 <5.67E+00 0.00E+00 5.67E+00 BaLa-140 <6.71E+00 0.00E+00 6.71E+00 Be-7 <3.83E+01 0.00E+00 3.83E+01 K-40 <9.63E+01 0.00E+00 9.63E+01 Sample ID: 229456 Sample Dates: 1/9/2012 - 2/6/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.05E+00 3.45E-01 1.09E+00 Mn-54 <5.68E+00 0.00E+00 5.68E+00 Co-58 <4.46E+00 0.00E+00 4.46E+00 Fe-59 <9.16E+00 0.00E+00 9.16E+00 Co-60 <6.31E+00 0.00E+00 6.31E+00 Zn-65 <6.95E+00 0.00E+00 6.95E+00 Zr-95 <8.79E+00 0.00E+00 8.79E+00 Nb-95 <5.50E+00 0.00E+00 5.50E+00 I-131 <7.05E+00 0.00E+00 7.05E+00 Cs-134 <4.60E+00 0.00E+00 4.60E+00 Cs-137 <4.99E+00 0.00E+00 4.99E+00 BaLa-140 <7.42E+00 0.00E+00 7.42E+00 Be-7 <4.39E+01 0.00E+00 4.39E+01 K-40 1.53E+02 2.84E+01 5.54E+01 Sample ID: 231153 Sample Dates: 12/12/2011 - 3/5/2012 Nuclide Activity 1 Sigma Error LLD H3DW 3.17E+02 5.69E+01 1.70E+02 Sample ID: 231676 Sample Dates: 2/6/2012 - 3/5/2012 Nuclide Activity 1 Sigma Error LLD Beta <4.95E-01 0.00E+00 1.23E+00 Mn-54 <5.10E+00 0.00E+00 5.10E+00 Co-58 <5.36E+00 0.00E+00 5.36E+00 Fe-59 <1.41E+01 0.00E+00 1.41E+01 Co-60 <7.74E+00 0.00E+00 7.74E+00 Zn-65 <1.43E+01 0.00E+00 1.43E+01 Zr-95 <1.40E+01 0.00E+00 1.40E+01 Nb-95 <7.81E+00 0.00E+00 7.81E+00 I-131 <6.91E+00 0.00E+00 6.91E+00 Cs-134 <4.64E+00 0.00E+00 4.64E+00 Cs-137 <7.28E+00 0.00E+00 7.28E+00 BaLa-140 <1.12E+01 0.00E+00 1.12E+01 Be-7 <4.67E+01 0.00E+00 4.67E+01 K-40 <1.29E+02 0.00E+00 1.29E+02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 81 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 234534 Sample Dates: 3/5/2012 - 4/2/2012 Nuclide Activity 1 Sigma Error LLD Beta 2.03E+00 3.80E-01 1.13E+00 Mn-54 <7.02E+00 0.00E+00 7.02E+00 Co-58 <6.75E+00 0.00E+00 6.75E+00 Fe-59 <1.54E+01 0.00E+00 1.54E+01 Co-60 <8.82E+00 0.00E+00 8.82E+00 Zn-65 <1.84E+01 0.00E+00 1.84E+01 Zr-95 <1.35E+01 0.00E+00 1.35E+01 Nb-95 <6.54E+00 0.00E+00 6.54E+00 I-131 <7.17E+00 0.00E+00 7.17E+00 Cs-134 <6.51E+00 0.00E+00 6.51E+00 Cs-137 <9.09E+00 0.00E+00 9.09E+00 BaLa-140 <9.88E+00 0.00E+00 9.88E+00 Be-7 <6.82E+01 0.00E+00 6.82E+01 K-40 1.49E+02 3.50E+01 7.34E+01 Sample ID: 235762 Sample Dates: 4/2/2012 - 4/30/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.57E+00 3.73E-01 1.15E+00 Mn-54 <5.47E+00 0.00E+00 5.47E+00 Co-58 <4.75E+00 0.00E+00 4.75E+00 Fe-59 <9.61E+00 0.00E+00 9.61E+00 Co-60 <6.31E+00 0.00E+00 6.31E+00 Zn-65 <1.01E+01 0.00E+00 1.01E+01 Zr-95 <6.14E+00 0.00E+00 6.14E+00 Nb-95 <4.62E+00 0.00E+00 4.62E+00 I-131 <6.04E+00 0.00E+00 6.04E+00 Cs-134 <4.13E+00 0.00E+00 4.13E+00 Cs-137 <5.31E+00 0.00E+00 5.31E+00 BaLa-140 <6.01E+00 0.00E+00 6.01E+00 Be-7 <3.86E+01 0.00E+00 3.86E+01 K-40 2.05E+02 2.78E+01 4.79E+01 Sample ID: 236830 Sample Dates: 5/29/2012 - 5/29/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.74E+00 3.96E-01 1.22E+00 Mn-54 <5.05E+00 0.00E+00 5.05E+00 Co-58 <3.36E+00 0.00E+00 3.36E+00 Fe-59 <1.02E+01 0.00E+00 1.02E+01 Co-60 <7.15E+00 0.00E+00 7.15E+00 Zn-65 <1.15E+01 0.00E+00 1.15E+01 Zr-95 <7.59E+00 0.00E+00 7.59E+00 Nb-95 <3.00E+00 0.00E+00 3.00E+00 I-131 <5.34E+00 0.00E+00 5.34E+00 Cs-134 <4.17E+00 0.00E+00 4.17E+00 Cs-137 <5.14E+00 0.00E+00 5.14E+00 BaLa-140 <5.97E+00 0.00E+00 5.97E+00 Be-7 <3.91E+01 0.00E+00 3.91E+01 K-40 1.33E+02 2.28E+01 3.43E+01 Sample ID: 236893 Sample Dates: 3/5/2012 - 5/29/2012 Nuclide Activity 1 Sigma Error LLD H3DW 3.60E+02 5.80E+01 1.71E+02 Sample ID: 238759 Sample Dates: 5/29/2012 - 6/25/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.80E+00 3.92E-01 1.20E+00 Mn-54 <2.90E+00 0.00E+00 2.90E+00 Co-58 <5.23E+00 0.00E+00 5.23E+00 Fe-59 <8.80E+00 0.00E+00 8.80E+00 Co-60 <8.37E+00 0.00E+00 8.37E+00 Zn-65 <1.17E+01 0.00E+00 1.17E+01 Zr-95 <8.67E+00 0.00E+00 8.67E+00 Nb-95 <5.32E+00 0.00E+00 5.32E+00 I-131 <5.94E+00 0.00E+00 5.94E+00 Cs-134 <4.30E+00 0.00E+00 4.30E+00 Cs-137 <5.75E+00 0.00E+00 5.75E+00 BaLa-140 <6.88E+00 0.00E+00 6.88E+00 Be-7 <4.08E+01 0.00E+00 4.08E+01 K-40 1.28E+02 2.69E+01 6.29E+01 Sample ID: 240366 Sample Dates: 6/25/2012 - 7/23/2012 Nuclide Activity 1 Sigma Error LLD Beta 8.61E-01 4.09E-01 1.34E+00 Mn-54 <4.31E+00 0.00E+00 4.31E+00 Co-58 <4.84E+00 0.00E+00 4.84E+00 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 82 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 240366 Sample Dates: 6/25/2012 - 7/23/2012 Nuclide Activity 1 Sigma Error LLD Fe-59 <9.02E+00 0.00E+00 9.02E+00 Co-60 <7.85E+00 0.00E+00 7.85E+00 Zn-65 <9.11E+00 0.00E+00 9.11E+00 Zr-95 <8.92E+00 0.00E+00 8.92E+00 Nb-95 <5.42E+00 0.00E+00 5.42E+00 I-131 <5.14E+00 0.00E+00 5.14E+00 Cs-134 <5.43E+00 0.00E+00 5.43E+00 Cs-137 <6.92E+00 0.00E+00 6.92E+00 BaLa-140 <8.36E+00 0.00E+00 8.36E+00 Be-7 <4.07E+01 0.00E+00 4.07E+01 K-40 1.39E+02 2.77E+01 6.20E+01 Sample ID: 242156 Sample Dates: 7/23/2012 - 8/20/2012 Nuclide Activity 1 Sigma Error LLD Beta 9.71E-01 4.08E-01 1.32E+00 Mn-54 <5.18E+00 0.00E+00 5.18E+00 Co-58 <4.99E+00 0.00E+00 4.99E+00 Fe-59 <1.14E+01 0.00E+00 1.14E+01 Co-60 <7.95E+00 0.00E+00 7.95E+00 Zn-65 <1.09E+01 0.00E+00 1.09E+01 Zr-95 <9.04E+00 0.00E+00 9.04E+00 Nb-95 <4.51E+00 0.00E+00 4.51E+00 I-131 <5.22E+00 0.00E+00 5.22E+00 Cs-134 <4.08E+00 0.00E+00 4.08E+00 Cs-137 <4.93E+00 0.00E+00 4.93E+00 BaLa-140 <6.41E+00 0.00E+00 6.41E+00 Be-7 <3.74E+01 0.00E+00 3.74E+01 K-40 5.81E+01 1.61E+01 3.81E+01 Sample ID: 242491 Sample Dates: 5/29/2012 - 8/20/2012 Nuclide Activity 1 Sigma Error LLD H3DW 2.93E+02 5.75E+01 1.73E+02 Sample ID: 244175 Sample Dates: 8/20/2012 - 9/17/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.26E+00 4.04E-01 1.28E+00 Mn-54 <6.77E+00 0.00E+00 6.77E+00 Co-58 <8.49E+00 0.00E+00 8.49E+00 Fe-59 <1.36E+01 0.00E+00 1.36E+01 Co-60 <1.08E+01 0.00E+00 1.08E+01 Zn-65 <1.28E+01 0.00E+00 1.28E+01 Zr-95 <1.25E+01 0.00E+00 1.25E+01 Nb-95 <8.79E+00 0.00E+00 8.79E+00 I-131 <7.13E+00 0.00E+00 7.13E+00 Cs-134 <7.32E+00 0.00E+00 7.32E+00 Cs-137 <9.35E+00 0.00E+00 9.35E+00 BaLa-140 <1.18E+01 0.00E+00 1.18E+01 Be-7 <5.45E+01 0.00E+00 5.45E+01 K-40 1.40E+02 3.41E+01 7.97E+01 Sample ID: 247130 Sample Dates: 9/17/2012 - 10/15/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.32E+00 4.08E-01 1.30E+00 Mn-54 <4.74E+00 0.00E+00 4.74E+00 Co-58 <5.31E+00 0.00E+00 5.31E+00 Fe-59 <1.32E+01 0.00E+00 1.32E+01 Co-60 <7.43E+00 0.00E+00 7.43E+00 Zn-65 <1.04E+01 0.00E+00 1.04E+01 Zr-95 <7.58E+00 0.00E+00 7.58E+00 Nb-95 <6.45E+00 0.00E+00 6.45E+00 I-131 <6.50E+00 0.00E+00 6.50E+00 Cs-134 <6.62E+00 0.00E+00 6.62E+00 Cs-137 <6.62E+00 0.00E+00 6.62E+00 BaLa-140 <7.34E+00 0.00E+00 7.34E+00 Be-7 <4.96E+01 0.00E+00 4.96E+01 K-40 3.83E+01 2.26E+01 4.80E+01 Sample ID: 248382 Sample Dates: 10/15/2012 - 11/12/2012 Nuclide Activity 1 Sigma Error LLD Beta 1.16E+00 3.87E-01 1.23E+00 Mn-54 <7.70E+00 0.00E+00 7.70E+00 Co-58 <4.91E+00 0.00E+00 4.91E+00 Fe-59 <1.44E+01 0.00E+00 1.44E+01 Co-60 <5.64E+00 0.00E+00 5.64E+00 Zn-65 <1.42E+01 0.00E+00 1.42E+01 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 83 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 248382 Sample Dates: 10/15/2012 - 11/12/2012 Nuclide Activity 1 Sigma Error LLD Zr-95 <1.08E+01 0.00E+00 1.08E+01 Nb-95 <4.82E+00 0.00E+00 4.82E+00 I-131 <8.16E+00 0.00E+00 8.16E+00 Cs-134 <6.60E+00 0.00E+00 6.60E+00 Cs-137 <7.64E+00 0.00E+00 7.64E+00 BaLa-140 <9.34E+00 0.00E+00 9.34E+00 Be-7 <5.42E+01 0.00E+00 5.42E+01 K-40 <1.33E+02 0.00E+00 1.33E+02 Sample ID: 249033 Sample Dates: 11/12/2012 - 12/10/2012 Nuclide Activity 1 Sigma Error LLD Beta <-6.0E-01 0.00E+00 1.45E+00 Mn-54 <4.55E+00 0.00E+00 4.55E+00 Co-58 <4.69E+00 0.00E+00 4.69E+00 Fe-59 <9.84E+00 0.00E+00 9.84E+00 Co-60 <7.42E+00 0.00E+00 7.42E+00 Zn-65 <1.23E+01 0.00E+00 1.23E+01 Zr-95 <8.02E+00 0.00E+00 8.02E+00 Nb-95 <5.30E+00 0.00E+00 5.30E+00 I-131 <5.30E+00 0.00E+00 5.30E+00 Cs-134 <4.86E+00 0.00E+00 4.86E+00 Cs-137 <5.37E+00 0.00E+00 5.37E+00 BaLa-140 <7.10E+00 0.00E+00 7.10E+00 Be-7 <3.89E+01 0.00E+00 3.89E+01 K-40 5.65E+01 2.06E+01 5.26E+01 Sample ID: 249471 Sample Dates: 8/20/2012 - 12/10/2012 Nuclide Activity 1 Sigma Error LLD H3DW 3.15E+02 5.93E+01 1.78E+02 Media Type: FISH_BTMFEEDER Concentration (Activity): pCi/kg Sample Point 060 [ INDICATOR - NE @ 3.23 miles ]

Sample ID: 233500 Sample Dates: 4/16/2012 - 4/16/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <1.11E+01 0.00E+00 1.11E+01 Co-58 <1.18E+01 0.00E+00 1.18E+01 Fe-59 <2.70E+01 0.00E+00 2.70E+01 Co-60 <1.60E+01 0.00E+00 1.60E+01 Zn-65 <3.28E+01 0.00E+00 3.28E+01 Nb-95 <1.04E+01 0.00E+00 1.04E+01 I-131 <1.04E+01 0.00E+00 1.04E+01 Cs-134 <1.31E+01 0.00E+00 1.31E+01 Cs-137 3.18E+01 4.82E+00 7.97E+00 Be-7 <7.50E+01 0.00E+00 7.50E+01 K-40 3.04E+03 1.68E+02 7.98E+01 Ag-110M <7.24E+00 0.00E+00 7.24E+00 Sb-122 <1.85E+01 0.00E+00 1.85E+01 Sb-125 <2.48E+01 0.00E+00 2.48E+01 Sample ID: 244928 Sample Dates: 10/8/2012 - 10/8/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <1.39E+01 0.00E+00 1.39E+01 Co-58 <1.34E+01 0.00E+00 1.34E+01 Fe-59 <3.42E+01 0.00E+00 3.42E+01 Co-60 <1.97E+01 0.00E+00 1.97E+01 Zn-65 <3.21E+01 0.00E+00 3.21E+01 Nb-95 <1.57E+01 0.00E+00 1.57E+01 I-131 <1.44E+01 0.00E+00 1.44E+01 Cs-134 <1.34E+01 0.00E+00 1.34E+01 Cs-137 2.38E+01 6.69E+00 1.13E+01 Be-7 <1.10E+02 0.00E+00 1.10E+02 K-40 2.84E+03 1.86E+02 8.22E+01 Ag-110M <1.20E+01 0.00E+00 1.20E+01 Sb-122 <2.15E+01 0.00E+00 2.15E+01 Sb-125 <3.78E+01 0.00E+00 3.78E+01 Sample Point 063 [ INDICATOR - ESE @ 0.8 miles ]

Sample ID: 233501 Sample Dates: 4/16/2012 - 4/16/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <1.46E+01 0.00E+00 1.46E+01 Co-58 <1.32E+01 0.00E+00 1.32E+01 Fe-59 <3.02E+01 0.00E+00 3.02E+01 Co-60 <2.05E+01 0.00E+00 2.05E+01 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 84 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 233501 Sample Dates: 4/16/2012 - 4/16/2012 Nuclide Activity 1 Sigma Error LLD Zn-65 <2.56E+01 0.00E+00 2.56E+01 Nb-95 <1.09E+01 0.00E+00 1.09E+01 I-131 <1.04E+01 0.00E+00 1.04E+01 Cs-134 <1.35E+01 0.00E+00 1.35E+01 Cs-137 4.54E+01 6.85E+00 1.17E+01 Be-7 <1.00E+02 0.00E+00 1.00E+02 K-40 4.47E+03 2.07E+02 1.12E+02 Ag-110M <1.16E+01 0.00E+00 1.16E+01 Sb-122 <1.62E+01 0.00E+00 1.62E+01 Sb-125 <3.49E+01 0.00E+00 3.49E+01 Sample ID: 244929 Sample Dates: 10/8/2012 - 10/8/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <2.46E+01 0.00E+00 2.46E+01 Co-58 1.23E+02 2.36E+01 3.28E+01 Fe-59 <9.62E+01 0.00E+00 9.62E+01 Co-60 3.61E+01 1.07E+01 2.85E+01 Zn-65 <7.34E+01 0.00E+00 7.34E+01 Nb-95 <5.15E+01 0.00E+00 5.15E+01 I-131 <5.29E+02 0.00E+00 5.29E+02 Cs-134 <2.93E+01 0.00E+00 2.93E+01 Cs-137 7.12E+01 1.18E+01 2.06E+01 Be-7 <3.14E+02 0.00E+00 3.14E+02 K-40 3.37E+03 2.93E+02 2.64E+02 Ag-110M <1.69E+01 0.00E+00 1.69E+01 Sb-122 <0.00E+00 0.00E+00 0.00E+00 Sb-125 <6.24E+01 0.00E+00 6.24E+01 Sample Point 067 [ INDICATOR - SSE @ 4.34 miles ]

Sample ID: 233502 Sample Dates: 4/16/2012 - 4/16/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <2.32E+01 0.00E+00 2.32E+01 Co-58 <2.36E+01 0.00E+00 2.36E+01 Fe-59 <5.42E+01 0.00E+00 5.42E+01 Co-60 <3.24E+01 0.00E+00 3.24E+01 Zn-65 <6.09E+01 0.00E+00 6.09E+01 Nb-95 <2.31E+01 0.00E+00 2.31E+01 I-131 <2.06E+01 0.00E+00 2.06E+01 Cs-134 <2.50E+01 0.00E+00 2.50E+01 Cs-137 3.20E+01 1.51E+01 2.24E+01 Be-7 <1.86E+02 0.00E+00 1.86E+02 K-40 5.32E+03 3.36E+02 2.30E+02 Ag-110M <1.96E+01 0.00E+00 1.96E+01 Sb-122 <3.22E+01 0.00E+00 3.22E+01 Sb-125 <5.99E+01 0.00E+00 5.99E+01 Sample ID: 244930 Sample Dates: 10/8/2012 - 10/8/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <3.00E+01 0.00E+00 3.00E+01 Co-58 <2.71E+01 0.00E+00 2.71E+01 Fe-59 <7.85E+01 0.00E+00 7.85E+01 Co-60 <4.18E+01 0.00E+00 4.18E+01 Zn-65 <8.28E+01 0.00E+00 8.28E+01 Nb-95 <3.22E+01 0.00E+00 3.22E+01 I-131 <3.01E+01 0.00E+00 3.01E+01 Cs-134 <2.52E+01 0.00E+00 2.52E+01 Cs-137 4.09E+01 1.43E+01 2.37E+01 Be-7 <2.14E+02 0.00E+00 2.14E+02 K-40 3.22E+03 3.37E+02 3.23E+02 Ag-110M <2.91E+01 0.00E+00 2.91E+01 Sb-122 <5.76E+01 0.00E+00 5.76E+01 Sb-125 <6.59E+01 0.00E+00 6.59E+01 Media Type: FISH_PREDATOR Concentration (Activity): pCi/kg Sample Point 060 [ INDICATOR - NE @ 3.23 miles ]

Sample ID: 233503 Sample Dates: 4/16/2012 - 4/16/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <2.08E+01 0.00E+00 2.08E+01 Co-58 <1.23E+01 0.00E+00 1.23E+01 Fe-59 <3.61E+01 0.00E+00 3.61E+01 Co-60 <2.02E+01 0.00E+00 2.02E+01 Zn-65 <4.30E+01 0.00E+00 4.30E+01 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 85 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 233503 Sample Dates: 4/16/2012 - 4/16/2012 Nuclide Activity 1 Sigma Error LLD Nb-95 <1.44E+01 0.00E+00 1.44E+01 I-131 <1.63E+01 0.00E+00 1.63E+01 Cs-134 <1.50E+01 0.00E+00 1.50E+01 Cs-137 2.84E+01 8.70E+00 1.24E+01 Be-7 <1.04E+02 0.00E+00 1.04E+02 K-40 3.41E+03 2.30E+02 1.15E+02 Ag-110M <1.63E+01 0.00E+00 1.63E+01 Sb-122 <2.09E+01 0.00E+00 2.09E+01 Sb-125 <3.52E+01 0.00E+00 3.52E+01 Sample ID: 244931 Sample Dates: 10/8/2012 - 10/8/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <1.28E+01 0.00E+00 1.28E+01 Co-58 <2.25E+01 0.00E+00 2.25E+01 Fe-59 <3.30E+01 0.00E+00 3.30E+01 Co-60 <2.68E+01 0.00E+00 2.68E+01 Zn-65 <5.13E+01 0.00E+00 5.13E+01 Nb-95 <2.08E+01 0.00E+00 2.08E+01 I-131 <1.82E+01 0.00E+00 1.82E+01 Cs-134 <1.92E+01 0.00E+00 1.92E+01 Cs-137 <2.44E+01 0.00E+00 2.44E+01 Be-7 1.18E+02 5.10E+01 1.44E+02 K-40 3.09E+03 2.70E+02 2.67E+02 Ag-110M <1.61E+01 0.00E+00 1.61E+01 Sb-122 <2.95E+01 0.00E+00 2.95E+01 Sb-125 <4.37E+01 0.00E+00 4.37E+01 Sample Point 063 [ INDICATOR - ESE @ 0.8 miles ]

Sample ID: 233504 Sample Dates: 4/16/2012 - 4/16/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <1.86E+01 0.00E+00 1.86E+01 Co-58 <1.82E+01 0.00E+00 1.82E+01 Fe-59 <4.28E+01 0.00E+00 4.28E+01 Co-60 <2.52E+01 0.00E+00 2.52E+01 Zn-65 <4.79E+01 0.00E+00 4.79E+01 Nb-95 <1.64E+01 0.00E+00 1.64E+01 I-131 <1.71E+01 0.00E+00 1.71E+01 Cs-134 <1.83E+01 0.00E+00 1.83E+01 Cs-137 3.59E+01 7.60E+00 1.90E+01 Be-7 <1.31E+02 0.00E+00 1.31E+02 K-40 3.68E+03 2.58E+02 2.34E+02 Ag-110M <1.90E+01 0.00E+00 1.90E+01 Sb-122 <2.46E+01 0.00E+00 2.46E+01 Sb-125 <4.46E+01 0.00E+00 4.46E+01 Sample ID: 244932 Sample Dates: 10/8/2012 - 10/8/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <1.24E+01 0.00E+00 1.24E+01 Co-58 <1.50E+01 0.00E+00 1.50E+01 Fe-59 <2.94E+01 0.00E+00 2.94E+01 Co-60 <1.95E+01 0.00E+00 1.95E+01 Zn-65 <2.64E+01 0.00E+00 2.64E+01 Nb-95 <1.30E+01 0.00E+00 1.30E+01 I-131 <1.10E+01 0.00E+00 1.10E+01 Cs-134 <1.37E+01 0.00E+00 1.37E+01 Cs-137 2.03E+01 6.13E+00 1.51E+01 Be-7 <8.42E+01 0.00E+00 8.42E+01 K-40 3.97E+03 2.29E+02 1.80E+02 Ag-110M <1.28E+01 0.00E+00 1.28E+01 Sb-122 <2.29E+01 0.00E+00 2.29E+01 Sb-125 <2.68E+01 0.00E+00 2.68E+01 Sample Point 067 [ INDICATOR - SSE @ 4.34 miles ]

Sample ID: 233505 Sample Dates: 4/16/2012 - 4/16/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <7.74E+00 0.00E+00 7.74E+00 Co-58 <1.06E+01 0.00E+00 1.06E+01 Fe-59 <2.50E+01 0.00E+00 2.50E+01 Co-60 <7.39E+00 0.00E+00 7.39E+00 Zn-65 <2.13E+01 0.00E+00 2.13E+01 Nb-95 <1.03E+01 0.00E+00 1.03E+01 I-131 <9.82E+00 0.00E+00 9.82E+00 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 86 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 233505 Sample Dates: 4/16/2012 - 4/16/2012 Nuclide Activity 1 Sigma Error LLD Cs-134 <1.04E+01 0.00E+00 1.04E+01 Cs-137 <1.63E+01 0.00E+00 1.63E+01 Be-7 <8.88E+01 0.00E+00 8.88E+01 K-40 3.34E+03 1.59E+02 6.84E+01 Ag-110M <1.02E+01 0.00E+00 1.02E+01 Sb-122 <1.54E+01 0.00E+00 1.54E+01 Sb-125 <2.25E+01 0.00E+00 2.25E+01 Sample ID: 244933 Sample Dates: 10/8/2012 - 10/8/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <1.43E+01 0.00E+00 1.43E+01 Co-58 <1.70E+01 0.00E+00 1.70E+01 Fe-59 <5.08E+01 0.00E+00 5.08E+01 Co-60 <1.60E+01 0.00E+00 1.60E+01 Zn-65 <4.21E+01 0.00E+00 4.21E+01 Nb-95 <1.72E+01 0.00E+00 1.72E+01 I-131 <1.40E+01 0.00E+00 1.40E+01 Cs-134 <1.44E+01 0.00E+00 1.44E+01 Cs-137 1.72E+01 5.44E+00 1.51E+01 Be-7 <1.00E+02 0.00E+00 1.00E+02 K-40 3.52E+03 2.30E+02 1.62E+02 Ag-110M <1.52E+01 0.00E+00 1.52E+01 Sb-122 <2.37E+01 0.00E+00 2.37E+01 Sb-125 <3.21E+01 0.00E+00 3.21E+01 Media Type: MILK Concentration (Activity): pCi/l Sample Point 071 [ CONTROL - SSE @ 10.2 miles ]

Sample ID: 227247 Sample Dates: 1/3/2012 - 1/3/2012 Nuclide Activity 1 Sigma Error LLD Be-7 <5.18E+00 0.00E+00 5.18E+00 K-40 1.85E+01 4.67E+00 8.30E+00 LLI-131 <6.42E-01 0.00E+00 6.42E-01 I-131 <5.24E+00 0.00E+00 5.24E+00 Cs-134 <5.40E+00 0.00E+00 5.40E+00 Cs-137 <7.36E+00 0.00E+00 7.36E+00 BaLa-140 <5.94E+00 0.00E+00 5.94E+00 Be-7 <4.04E+01 0.00E+00 4.04E+01 K-40 1.40E+03 7.40E+01 4.32E+01 Sample ID: 227550 Sample Dates: 1/16/2012 - 1/16/2012 Nuclide Activity 1 Sigma Error LLD Be-7 <4.83E+00 0.00E+00 4.83E+00 K-40 5.60E+01 4.71E+00 5.86E+00 LLI-131 <6.17E-01 0.00E+00 6.17E-01 I-131 <5.65E+00 0.00E+00 5.65E+00 Cs-134 <4.79E+00 0.00E+00 4.79E+00 Cs-137 <6.44E+00 0.00E+00 6.44E+00 BaLa-140 <1.31E+00 0.00E+00 1.31E+00 Be-7 <4.80E+01 0.00E+00 4.80E+01 K-40 1.59E+03 7.81E+01 5.03E+01 Sample ID: 228140 Sample Dates: 1/30/2012 - 1/30/2012 Nuclide Activity 1 Sigma Error LLD Be-7 <4.94E+00 0.00E+00 4.94E+00 K-40 9.52E+00 4.41E+00 7.64E+00 LLI-131 <6.47E-01 0.00E+00 6.47E-01 I-131 <6.90E+00 0.00E+00 6.90E+00 Cs-134 <6.82E+00 0.00E+00 6.82E+00 Cs-137 <9.89E+00 0.00E+00 9.89E+00 BaLa-140 <7.01E+00 0.00E+00 7.01E+00 Be-7 <4.71E+01 0.00E+00 4.71E+01 K-40 1.30E+03 1.15E+02 9.52E+01 Sample ID: 230076 Sample Dates: 2/13/2012 - 2/13/2012 Nuclide Activity 1 Sigma Error LLD Be-7 <5.20E+00 0.00E+00 5.20E+00 K-40 3.05E+01 3.27E+00 7.72E+00 LLI-131 <6.45E-01 0.00E+00 6.45E-01 I-131 <8.76E+00 0.00E+00 8.76E+00 Cs-134 <8.47E+00 0.00E+00 8.47E+00 Cs-137 <1.12E+01 0.00E+00 1.12E+01 BaLa-140 <1.13E+01 0.00E+00 1.13E+01 Be-7 <7.54E+01 0.00E+00 7.54E+01 K-40 1.46E+03 1.36E+02 1.23E+02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 87 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 230960 Sample Dates: 2/27/2012 - 2/27/2012 Nuclide Activity 1 Sigma Error LLD Be-7 <3.63E+00 0.00E+00 3.63E+00 K-40 3.32E+01 3.82E+00 5.40E+00 LLI-131 <5.24E-01 0.00E+00 5.24E-01 I-131 <6.21E+00 0.00E+00 6.21E+00 Cs-134 <4.84E+00 0.00E+00 4.84E+00 Cs-137 <6.15E+00 0.00E+00 6.15E+00 BaLa-140 <4.99E+00 0.00E+00 4.99E+00 Be-7 <3.69E+01 0.00E+00 3.69E+01 K-40 1.65E+03 8.42E+01 3.67E+01 Sample ID: 232484 Sample Dates: 3/12/2012 - 3/12/2012 Nuclide Activity 1 Sigma Error LLD Be-7 <3.77E+00 0.00E+00 3.77E+00 K-40 2.72E+01 4.25E+00 7.08E+00 LLI-131 <5.44E-01 0.00E+00 5.44E-01 I-131 <8.53E+00 0.00E+00 8.53E+00 Cs-134 <8.09E+00 0.00E+00 8.09E+00 Cs-137 <1.00E+01 0.00E+00 1.00E+01 BaLa-140 <7.71E+00 0.00E+00 7.71E+00 Be-7 <5.25E+01 0.00E+00 5.25E+01 K-40 1.53E+03 1.20E+02 9.52E+01 Sample ID: 233565 Sample Dates: 3/26/2012 - 3/26/2012 Nuclide Activity 1 Sigma Error LLD Be-7 <4.60E+00 0.00E+00 4.60E+00 K-40 3.27E+01 3.67E+00 4.04E+00 LLI-131 <5.99E-01 0.00E+00 5.99E-01 I-131 <5.94E+00 0.00E+00 5.94E+00 Cs-134 <4.99E+00 0.00E+00 4.99E+00 Cs-137 <5.30E+00 0.00E+00 5.30E+00 BaLa-140 <4.49E+00 0.00E+00 4.49E+00 Be-7 <3.69E+01 0.00E+00 3.69E+01 K-40 1.78E+03 8.45E+01 4.56E+01 Sample ID: 234914 Sample Dates: 4/9/2012 - 4/9/2012 Nuclide Activity 1 Sigma Error LLD Be-7 <4.41E+00 0.00E+00 4.41E+00 K-40 4.90E+01 5.48E+00 5.72E+00 LLI-131 <5.62E-01 0.00E+00 5.62E-01 I-131 <6.53E+00 0.00E+00 6.53E+00 Cs-134 <5.72E+00 0.00E+00 5.72E+00 Cs-137 <6.94E+00 0.00E+00 6.94E+00 BaLa-140 <6.82E+00 0.00E+00 6.82E+00 Be-7 <4.69E+01 0.00E+00 4.69E+01 K-40 1.70E+03 8.35E+01 5.30E+01 Sample ID: 235432 Sample Dates: 4/23/2012 - 4/23/2012 Nuclide Activity 1 Sigma Error LLD Be-7 <5.30E+00 0.00E+00 5.30E+00 K-40 7.00E+01 5.59E+00 5.46E+00 LLI-131 <6.47E-01 0.00E+00 6.47E-01 I-131 <5.70E+00 0.00E+00 5.70E+00 Cs-134 <4.83E+00 0.00E+00 4.83E+00 Cs-137 <5.51E+00 0.00E+00 5.51E+00 BaLa-140 <5.91E+00 0.00E+00 5.91E+00 Be-7 <4.23E+01 0.00E+00 4.23E+01 K-40 1.53E+03 8.20E+01 5.45E+01 Sample ID: 236002 Sample Dates: 5/7/2012 - 5/7/2012 Nuclide Activity 1 Sigma Error LLD Be-7 <4.28E+00 0.00E+00 4.28E+00 K-40 5.04E+01 4.68E+00 6.11E+00 LLI-131 <5.96E-01 0.00E+00 5.96E-01 I-131 <6.04E+00 0.00E+00 6.04E+00 Cs-134 <5.24E+00 0.00E+00 5.24E+00 Cs-137 <5.85E+00 0.00E+00 5.85E+00 BaLa-140 <1.31E+00 0.00E+00 1.31E+00 Be-7 <4.84E+01 0.00E+00 4.84E+01 K-40 1.73E+03 8.15E+01 5.85E+01 Sample ID: 236525 Sample Dates: 5/21/2012 - 5/21/2012 Nuclide Activity 1 Sigma Error LLD Be-7 <4.77E+00 0.00E+00 4.77E+00 K-40 2.60E+01 3.89E+00 7.13E+00 LLI-131 <6.30E-01 0.00E+00 6.30E-01 I-131 <5.56E+00 0.00E+00 5.56E+00 Cs-134 <3.76E+00 0.00E+00 3.76E+00 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 88 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 236525 Sample Dates: 5/21/2012 - 5/21/2012 Nuclide Activity 1 Sigma Error LLD Cs-137 <6.02E+00 0.00E+00 6.02E+00 BaLa-140 <6.34E+00 0.00E+00 6.34E+00 Be-7 <4.84E+01 0.00E+00 4.84E+01 K-40 1.51E+03 8.35E+01 4.62E+01 Sample ID: 237150 Sample Dates: 6/4/2012 - 6/4/2012 Nuclide Activity 1 Sigma Error LLD Be-7 <4.73E+00 0.00E+00 4.73E+00 K-40 5.81E+01 5.50E+00 6.03E+00 LLI-131 <6.48E-01 0.00E+00 6.48E-01 I-131 <7.12E+00 0.00E+00 7.12E+00 Cs-134 <5.34E+00 0.00E+00 5.34E+00 Cs-137 <4.96E+00 0.00E+00 4.96E+00 BaLa-140 <2.27E+00 0.00E+00 2.27E+00 Be-7 <4.47E+01 0.00E+00 4.47E+01 K-40 1.59E+03 7.97E+01 4.08E+01 Sample ID: 238001 Sample Dates: 6/18/2012 - 6/18/2012 Nuclide Activity 1 Sigma Error LLD Be-7 <4.04E+00 0.00E+00 4.04E+00 K-40 1.96E+01 4.32E+00 7.27E+00 LLI-131 <5.96E-01 0.00E+00 5.96E-01 I-131 <8.25E+00 0.00E+00 8.25E+00 Cs-134 <7.55E+00 0.00E+00 7.55E+00 Cs-137 <9.86E+00 0.00E+00 9.86E+00 BaLa-140 <1.07E+01 0.00E+00 1.07E+01 Be-7 <7.24E+01 0.00E+00 7.24E+01 K-40 1.37E+03 1.05E+02 9.04E+01 Sample ID: 239153 Sample Dates: 7/2/2012 - 7/2/2012 Nuclide Activity 1 Sigma Error LLD Be-7 <5.11E+00 0.00E+00 5.11E+00 K-40 2.38E+01 5.16E+00 9.46E+00 LLI-131 <5.98E-01 0.00E+00 5.98E-01 I-131 <4.69E+00 0.00E+00 4.69E+00 Cs-134 <4.69E+00 0.00E+00 4.69E+00 Cs-137 <7.06E+00 0.00E+00 7.06E+00 BaLa-140 <3.62E+00 0.00E+00 3.62E+00 Be-7 <4.37E+01 0.00E+00 4.37E+01 K-40 1.54E+03 7.94E+01 5.60E+01 Sample ID: 240026 Sample Dates: 7/16/2012 - 7/16/2012 Nuclide Activity 1 Sigma Error LLD Be-7 <3.98E+00 0.00E+00 3.98E+00 K-40 1.39E+01 2.22E+00 5.61E+00 LLI-131 <5.87E-01 0.00E+00 5.87E-01 I-131 <7.94E+00 0.00E+00 7.94E+00 Cs-134 <5.89E+00 0.00E+00 5.89E+00 Cs-137 <8.14E+00 0.00E+00 8.14E+00 BaLa-140 <6.90E+00 0.00E+00 6.90E+00 Be-7 <5.33E+01 0.00E+00 5.33E+01 K-40 1.28E+03 1.01E+02 8.08E+01 Sample ID: 240983 Sample Dates: 7/30/2012 - 7/30/2012 Nuclide Activity 1 Sigma Error LLD Be-7 <5.33E+00 0.00E+00 5.33E+00 K-40 1.60E+01 3.98E+00 6.96E+00 LLI-131 <6.20E-01 0.00E+00 6.20E-01 I-131 <8.88E+00 0.00E+00 8.88E+00 Cs-134 <6.84E+00 0.00E+00 6.84E+00 Cs-137 <1.06E+01 0.00E+00 1.06E+01 BaLa-140 <4.97E+00 0.00E+00 4.97E+00 Be-7 <5.68E+01 0.00E+00 5.68E+01 K-40 1.64E+03 1.20E+02 1.12E+02 Sample ID: 241561 Sample Dates: 8/13/2012 - 8/13/2012 Nuclide Activity 1 Sigma Error LLD Be-7 <4.06E+00 0.00E+00 4.06E+00 K-40 5.60E+01 4.66E+00 5.04E+00 LLI-131 <6.25E-01 0.00E+00 6.25E-01 I-131 <7.46E+00 0.00E+00 7.46E+00 Cs-134 <7.15E+00 0.00E+00 7.15E+00 Cs-137 <9.57E+00 0.00E+00 9.57E+00 BaLa-140 <7.73E+00 0.00E+00 7.73E+00 Be-7 <5.26E+01 0.00E+00 5.26E+01 K-40 1.48E+03 1.16E+02 7.38E+01 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 89 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 242480 Sample Dates: 8/27/2012 - 8/27/2012 Nuclide Activity 1 Sigma Error LLD Be-7 <4.07E+00 0.00E+00 4.07E+00 K-40 1.86E+01 3.58E+00 5.15E+00 LLI-131 <5.01E-01 0.00E+00 5.01E-01 I-131 <7.14E+00 0.00E+00 7.14E+00 Cs-134 <8.62E+00 0.00E+00 8.62E+00 Cs-137 <1.10E+01 0.00E+00 1.10E+01 BaLa-140 <2.60E+00 0.00E+00 2.60E+00 Be-7 <5.74E+01 0.00E+00 5.74E+01 K-40 1.36E+03 1.01E+02 8.20E+01 Sample ID: 243764 Sample Dates: 9/10/2012 - 9/10/2012 Nuclide Activity 1 Sigma Error LLD Be-7 <5.63E+00 0.00E+00 5.63E+00 K-40 <2.62E+01 0.00E+00 2.62E+01 LLI-131 <6.38E-01 0.00E+00 6.38E-01 I-131 <6.45E+00 0.00E+00 6.45E+00 Cs-134 <8.14E+00 0.00E+00 8.14E+00 Cs-137 <7.63E+00 0.00E+00 7.63E+00 BaLa-140 <1.27E+01 0.00E+00 1.27E+01 Be-7 <5.94E+01 0.00E+00 5.94E+01 K-40 1.42E+03 1.05E+02 7.06E+01 Sample ID: 245054 Sample Dates: 9/24/2012 - 9/24/2012 Nuclide Activity 1 Sigma Error LLD Be-7 <4.44E+00 0.00E+00 4.44E+00 K-40 1.95E+01 3.35E+00 8.14E+00 LLI-131 <5.97E-01 0.00E+00 5.97E-01 I-131 <1.06E+01 0.00E+00 1.06E+01 Cs-134 <7.28E+00 0.00E+00 7.28E+00 Cs-137 <8.96E+00 0.00E+00 8.96E+00 BaLa-140 <1.26E+01 0.00E+00 1.26E+01 Be-7 <6.76E+01 0.00E+00 6.76E+01 K-40 1.40E+03 1.13E+02 9.56E+01 Sample ID: 246717 Sample Dates: 10/8/2012 - 10/8/2012 Nuclide Activity 1 Sigma Error LLD Be-7 <6.52E+00 0.00E+00 6.52E+00 K-40 <1.62E+01 0.00E+00 1.62E+01 LLI-131 <6.39E-01 0.00E+00 6.39E-01 I-131 <7.33E+00 0.00E+00 7.33E+00 Cs-134 <6.40E+00 0.00E+00 6.40E+00 Cs-137 <9.23E+00 0.00E+00 9.23E+00 BaLa-140 <7.73E+00 0.00E+00 7.73E+00 Be-7 <5.21E+01 0.00E+00 5.21E+01 K-40 1.26E+03 1.06E+02 7.56E+01 Sample ID: 247439 Sample Dates: 10/22/2012 - 10/22/2012 Nuclide Activity 1 Sigma Error LLD Be-7 <3.53E+00 0.00E+00 3.53E+00 K-40 1.59E+01 3.81E+00 7.00E+00 LLI-131 <5.35E-01 0.00E+00 5.35E-01 I-131 <5.62E+00 0.00E+00 5.62E+00 Cs-134 <4.98E+00 0.00E+00 4.98E+00 Cs-137 <6.79E+00 0.00E+00 6.79E+00 BaLa-140 <6.69E+00 0.00E+00 6.69E+00 Be-7 <4.60E+01 0.00E+00 4.60E+01 K-40 1.42E+03 8.06E+01 4.52E+01 Sample ID: 247972 Sample Dates: 11/5/2012 - 11/5/2012 Nuclide Activity 1 Sigma Error LLD Be-7 <4.01E+00 0.00E+00 4.01E+00 K-40 5.14E+00 1.96E+00 6.64E+00 LLI-131 <4.96E-01 0.00E+00 4.96E-01 I-131 <7.37E+00 0.00E+00 7.37E+00 Cs-134 <7.91E+00 0.00E+00 7.91E+00 Cs-137 <7.76E+00 0.00E+00 7.76E+00 BaLa-140 <9.01E+00 0.00E+00 9.01E+00 Be-7 <5.34E+01 0.00E+00 5.34E+01 K-40 1.20E+03 9.90E+01 6.95E+01 Sample ID: 248668 Sample Dates: 11/19/2012 - 11/19/2012 Nuclide Activity 1 Sigma Error LLD Be-7 <5.23E+00 0.00E+00 5.23E+00 K-40 <2.06E+01 0.00E+00 2.06E+01 LLI-131 <6.44E-01 0.00E+00 6.44E-01 I-131 <5.52E+00 0.00E+00 5.52E+00 Cs-134 <5.25E+00 0.00E+00 5.25E+00 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 90 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 248668 Sample Dates: 11/19/2012 - 11/19/2012 Nuclide Activity 1 Sigma Error LLD Cs-137 <6.94E+00 0.00E+00 6.94E+00 BaLa-140 <7.31E+00 0.00E+00 7.31E+00 Be-7 <3.51E+01 0.00E+00 3.51E+01 K-40 1.43E+03 7.66E+01 4.50E+01 Sample ID: 249267 Sample Dates: 12/3/2012 - 12/3/2012 Nuclide Activity 1 Sigma Error LLD Be-7 <5.15E+00 0.00E+00 5.15E+00 K-40 2.70E+01 4.57E+00 6.83E+00 LLI-131 <6.43E-01 0.00E+00 6.43E-01 I-131 <4.63E+00 0.00E+00 4.63E+00 Cs-134 <7.23E+00 0.00E+00 7.23E+00 Cs-137 <8.73E+00 0.00E+00 8.73E+00 BaLa-140 <8.56E+00 0.00E+00 8.56E+00 Be-7 <5.13E+01 0.00E+00 5.13E+01 K-40 1.37E+03 1.02E+02 8.78E+01 Sample ID: 249892 Sample Dates: 12/17/2012 - 12/17/2012 Nuclide Activity 1 Sigma Error LLD Be-7 <3.56E+00 0.00E+00 3.56E+00 K-40 <2.36E+01 0.00E+00 2.36E+01 LLI-131 <6.26E-01 0.00E+00 6.26E-01 I-131 <5.95E+00 0.00E+00 5.95E+00 Cs-134 <4.90E+00 0.00E+00 4.90E+00 Cs-137 <6.80E+00 0.00E+00 6.80E+00 BaLa-140 <6.14E+00 0.00E+00 6.14E+00 Be-7 <5.09E+01 0.00E+00 5.09E+01 K-40 1.56E+03 7.97E+01 7.57E+01 Sample ID: 250457 Sample Dates: 12/31/2012 - 12/31/2012 Nuclide Activity 1 Sigma Error LLD Be-7 <3.81E+00 0.00E+00 3.81E+00 K-40 1.44E+01 3.16E+00 7.10E+00 LLI-131 <5.75E-01 0.00E+00 5.75E-01 I-131 <8.21E+00 0.00E+00 8.21E+00 Cs-134 <7.98E+00 0.00E+00 7.98E+00 Cs-137 <8.54E+00 0.00E+00 8.54E+00 BaLa-140 <8.20E+00 0.00E+00 8.20E+00 Be-7 <5.46E+01 0.00E+00 5.46E+01 K-40 1.30E+03 1.04E+02 9.49E+01 Media Type: SEDIMENT_SHORE Concentration (Activity): pCi/kg Sample Point 063 [ INDICATOR - ESE @ 0.8 miles ]

Sample ID: 233512 Sample Dates: 4/16/2012 - 4/16/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <2.52E+01 0.00E+00 2.52E+01 Co-58 <2.22E+01 0.00E+00 2.22E+01 Fe-59 <5.51E+01 0.00E+00 5.51E+01 Co-60 <2.61E+01 0.00E+00 2.61E+01 Zn-65 <5.92E+01 0.00E+00 5.92E+01 Zr-95 <4.02E+01 0.00E+00 4.02E+01 Nb-95 <2.49E+01 0.00E+00 2.49E+01 I-131 <1.90E+01 0.00E+00 1.90E+01 Cs-134 <1.85E+01 0.00E+00 1.85E+01 Cs-137 2.61E+01 7.84E+00 2.24E+01 Be-7 <1.77E+02 0.00E+00 1.77E+02 K-40 2.39E+04 4.46E+02 2.75E+02 Co-57 <1.60E+01 0.00E+00 1.60E+01 Mo-99 <2.53E+02 0.00E+00 2.53E+02 Ag-110M <1.82E+01 0.00E+00 1.82E+01 Sb-122 <4.18E+01 0.00E+00 4.18E+01 Sb-125 <5.23E+01 0.00E+00 5.23E+01 Sample ID: 244940 Sample Dates: 10/1/2012 - 10/1/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <2.34E+01 0.00E+00 2.34E+01 Co-58 <2.61E+01 0.00E+00 2.61E+01 Fe-59 <5.89E+01 0.00E+00 5.89E+01 Co-60 <3.09E+01 0.00E+00 3.09E+01 Zn-65 <7.67E+01 0.00E+00 7.67E+01 Zr-95 <4.77E+01 0.00E+00 4.77E+01 Nb-95 <2.71E+01 0.00E+00 2.71E+01 I-131 <2.47E+01 0.00E+00 2.47E+01 Cs-134 <2.21E+01 0.00E+00 2.21E+01 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 91 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 244940 Sample Dates: 10/1/2012 - 10/1/2012 Nuclide Activity 1 Sigma Error LLD Cs-137 2.15E+01 8.69E+00 2.55E+01 Be-7 <1.96E+02 0.00E+00 1.96E+02 K-40 2.09E+04 5.61E+02 2.74E+02 Co-57 <1.49E+01 0.00E+00 1.49E+01 Mo-99 <4.14E+02 0.00E+00 4.14E+02 Ag-110M <2.06E+01 0.00E+00 2.06E+01 Sb-122 <6.74E+01 0.00E+00 6.74E+01 Sb-125 <5.94E+01 0.00E+00 5.94E+01 Sample Point 067 [ INDICATOR - SSE @ 4.34 miles ]

Sample ID: 233513 Sample Dates: 4/16/2012 - 4/16/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <2.43E+01 0.00E+00 2.43E+01 Co-58 <1.89E+01 0.00E+00 1.89E+01 Fe-59 <4.43E+01 0.00E+00 4.43E+01 Co-60 <2.50E+01 0.00E+00 2.50E+01 Zn-65 <4.76E+01 0.00E+00 4.76E+01 Zr-95 <3.48E+01 0.00E+00 3.48E+01 Nb-95 <2.08E+01 0.00E+00 2.08E+01 I-131 <1.97E+01 0.00E+00 1.97E+01 Cs-134 <1.72E+01 0.00E+00 1.72E+01 Cs-137 4.64E+01 1.62E+01 2.04E+01 Be-7 <1.60E+02 0.00E+00 1.60E+02 K-40 1.52E+04 3.42E+02 2.13E+02 Co-57 <1.42E+01 0.00E+00 1.42E+01 Mo-99 <2.42E+02 0.00E+00 2.42E+02 Ag-110M <1.90E+01 0.00E+00 1.90E+01 Sb-122 <4.14E+01 0.00E+00 4.14E+01 Sb-125 <4.79E+01 0.00E+00 4.79E+01 Sample ID: 244941 Sample Dates: 10/1/2012 - 10/1/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <2.38E+01 0.00E+00 2.38E+01 Co-58 <1.98E+01 0.00E+00 1.98E+01 Fe-59 <4.59E+01 0.00E+00 4.59E+01 Co-60 <2.29E+01 0.00E+00 2.29E+01 Zn-65 <4.02E+01 0.00E+00 4.02E+01 Zr-95 <3.83E+01 0.00E+00 3.83E+01 Nb-95 <2.42E+01 0.00E+00 2.42E+01 I-131 <3.31E+01 0.00E+00 3.31E+01 Cs-134 <1.85E+01 0.00E+00 1.85E+01 Cs-137 8.06E+01 1.31E+01 1.95E+01 Be-7 4.22E+02 7.80E+01 1.55E+02 K-40 1.49E+04 3.45E+02 1.82E+02 Co-57 <1.48E+01 0.00E+00 1.48E+01 Mo-99 <1.10E+03 0.00E+00 1.10E+03 Ag-110M <1.80E+01 0.00E+00 1.80E+01 Sb-122 <1.87E+02 0.00E+00 1.87E+02 Sb-125 <4.82E+01 0.00E+00 4.82E+01 Sample Point 068 [ CONTROL - W @ 1.82 miles ]

Sample ID: 233514 Sample Dates: 4/16/2012 - 4/16/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <1.94E+01 0.00E+00 1.94E+01 Co-58 <1.45E+01 0.00E+00 1.45E+01 Fe-59 <3.95E+01 0.00E+00 3.95E+01 Co-60 <1.98E+01 0.00E+00 1.98E+01 Zn-65 <3.89E+01 0.00E+00 3.89E+01 Zr-95 <2.51E+01 0.00E+00 2.51E+01 Nb-95 <1.82E+01 0.00E+00 1.82E+01 I-131 <1.53E+01 0.00E+00 1.53E+01 Cs-134 <1.44E+01 0.00E+00 1.44E+01 Cs-137 <1.82E+01 0.00E+00 1.82E+01 Be-7 1.89E+02 6.15E+01 1.20E+02 K-40 5.66E+03 2.67E+02 1.34E+02 Co-57 <9.15E+00 0.00E+00 9.15E+00 Mo-99 <2.01E+02 0.00E+00 2.01E+02 Ag-110M <1.29E+01 0.00E+00 1.29E+01 Sb-122 <2.74E+01 0.00E+00 2.74E+01 Sb-125 <3.30E+01 0.00E+00 3.30E+01 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 92 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

Media Type: SEDIMENT_SHORE Concentration (Activity): pCi/kg Sample Point 068 [ CONTROL - W @ 1.82 miles ]

Sample ID: 244942 Sample Dates: 10/1/2012 - 10/1/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <1.46E+01 0.00E+00 1.46E+01 Co-58 <1.40E+01 0.00E+00 1.40E+01 Fe-59 <3.70E+01 0.00E+00 3.70E+01 Co-60 <1.87E+01 0.00E+00 1.87E+01 Zn-65 <3.66E+01 0.00E+00 3.66E+01 Zr-95 <2.41E+01 0.00E+00 2.41E+01 Nb-95 <1.46E+01 0.00E+00 1.46E+01 I-131 <1.52E+01 0.00E+00 1.52E+01 Cs-134 <1.23E+01 0.00E+00 1.23E+01 Cs-137 <1.54E+01 0.00E+00 1.54E+01 Be-7 2.20E+02 6.46E+01 1.04E+02 K-40 1.05E+04 2.92E+02 1.49E+02 Co-57 <9.97E+00 0.00E+00 9.97E+00 Mo-99 <2.05E+02 0.00E+00 2.05E+02 Ag-110M <1.24E+01 0.00E+00 1.24E+01 Sb-122 <3.44E+01 0.00E+00 3.44E+01 Sb-125 <3.46E+01 0.00E+00 3.46E+01 Media Type: SURFACE WATER Concentration (Activity): pCi/l Sample Point 062 [ CONTROL - ENE @ 0.85 miles ]

Sample ID: 227349 Sample Dates: 12/12/2011 - 1/9/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <6.00E+00 0.00E+00 6.00E+00 Co-58 <7.56E+00 0.00E+00 7.56E+00 Fe-59 <1.48E+01 0.00E+00 1.48E+01 Co-60 <7.82E+00 0.00E+00 7.82E+00 Zn-65 <1.02E+01 0.00E+00 1.02E+01 Zr-95 <1.27E+01 0.00E+00 1.27E+01 Nb-95 <7.72E+00 0.00E+00 7.72E+00 I-131 <7.20E+00 0.00E+00 7.20E+00 Cs-134 <6.29E+00 0.00E+00 6.29E+00 Cs-137 <7.72E+00 0.00E+00 7.72E+00 BaLa-140 <1.18E+01 0.00E+00 1.18E+01 Be-7 <6.56E+01 0.00E+00 6.56E+01 K-40 <1.26E+02 0.00E+00 1.26E+02 Sample ID: 229460 Sample Dates: 1/9/2012 - 2/6/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <5.42E+00 0.00E+00 5.42E+00 Co-58 <4.86E+00 0.00E+00 4.86E+00 Fe-59 <1.07E+01 0.00E+00 1.07E+01 Co-60 <7.38E+00 0.00E+00 7.38E+00 Zn-65 <1.12E+01 0.00E+00 1.12E+01 Zr-95 <7.97E+00 0.00E+00 7.97E+00 Nb-95 <4.73E+00 0.00E+00 4.73E+00 I-131 <6.20E+00 0.00E+00 6.20E+00 Cs-134 <4.96E+00 0.00E+00 4.96E+00 Cs-137 <5.86E+00 0.00E+00 5.86E+00 BaLa-140 <7.24E+00 0.00E+00 7.24E+00 Be-7 <3.95E+01 0.00E+00 3.95E+01 K-40 1.63E+02 2.48E+01 5.20E+01 Sample ID: 231154 Sample Dates: 12/12/2011 - 3/5/2012 Nuclide Activity 1 Sigma Error LLD H3SW <-4.7E+01 0.00E+00 1.72E+02 Sample ID: 231680 Sample Dates: 2/6/2012 - 3/5/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <5.33E+00 0.00E+00 5.33E+00 Co-58 <4.44E+00 0.00E+00 4.44E+00 Fe-59 <9.67E+00 0.00E+00 9.67E+00 Co-60 <7.83E+00 0.00E+00 7.83E+00 Zn-65 <1.01E+01 0.00E+00 1.01E+01 Zr-95 <1.03E+01 0.00E+00 1.03E+01 Nb-95 <5.29E+00 0.00E+00 5.29E+00 I-131 <5.90E+00 0.00E+00 5.90E+00 Cs-134 <5.68E+00 0.00E+00 5.68E+00 Cs-137 <6.15E+00 0.00E+00 6.15E+00 BaLa-140 <4.86E+00 0.00E+00 4.86E+00 Be-7 <3.42E+01 0.00E+00 3.42E+01 K-40 1.10E+02 2.60E+01 4.60E+01 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 93 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 234538 Sample Dates: 3/5/2012 - 4/2/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <3.72E+00 0.00E+00 3.72E+00 Co-58 <6.78E+00 0.00E+00 6.78E+00 Fe-59 <1.07E+01 0.00E+00 1.07E+01 Co-60 <8.73E+00 0.00E+00 8.73E+00 Zn-65 <1.74E+01 0.00E+00 1.74E+01 Zr-95 <1.44E+01 0.00E+00 1.44E+01 Nb-95 <5.25E+00 0.00E+00 5.25E+00 I-131 <5.36E+00 0.00E+00 5.36E+00 Cs-134 <6.46E+00 0.00E+00 6.46E+00 Cs-137 <5.60E+00 0.00E+00 5.60E+00 BaLa-140 <9.17E+00 0.00E+00 9.17E+00 Be-7 <4.72E+01 0.00E+00 4.72E+01 K-40 <1.16E+02 0.00E+00 1.16E+02 Sample ID: 235766 Sample Dates: 4/2/2012 - 4/30/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <5.25E+00 0.00E+00 5.25E+00 Co-58 <4.72E+00 0.00E+00 4.72E+00 Fe-59 <8.57E+00 0.00E+00 8.57E+00 Co-60 <4.71E+00 0.00E+00 4.71E+00 Zn-65 <1.19E+01 0.00E+00 1.19E+01 Zr-95 <8.65E+00 0.00E+00 8.65E+00 Nb-95 <3.69E+00 0.00E+00 3.69E+00 I-131 <4.98E+00 0.00E+00 4.98E+00 Cs-134 <4.83E+00 0.00E+00 4.83E+00 Cs-137 <5.13E+00 0.00E+00 5.13E+00 BaLa-140 <5.75E+00 0.00E+00 5.75E+00 Be-7 <3.21E+01 0.00E+00 3.21E+01 K-40 6.05E+01 2.95E+01 5.75E+01 Sample ID: 236834 Sample Dates: 4/30/2012 - 5/29/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <5.58E+00 0.00E+00 5.58E+00 Co-58 <1.99E+00 0.00E+00 1.99E+00 Fe-59 <8.90E+00 0.00E+00 8.90E+00 Co-60 <7.89E+00 0.00E+00 7.89E+00 Zn-65 <1.14E+01 0.00E+00 1.14E+01 Zr-95 <1.22E+01 0.00E+00 1.22E+01 Nb-95 <7.34E+00 0.00E+00 7.34E+00 I-131 <6.88E+00 0.00E+00 6.88E+00 Cs-134 <6.72E+00 0.00E+00 6.72E+00 Cs-137 <7.89E+00 0.00E+00 7.89E+00 BaLa-140 <7.14E+00 0.00E+00 7.14E+00 Be-7 <5.33E+01 0.00E+00 5.33E+01 K-40 <1.21E+02 0.00E+00 1.21E+02 Sample ID: 236894 Sample Dates: 3/5/2012 - 5/29/2012 Nuclide Activity 1 Sigma Error LLD H3SW <-4.4E+00 0.00E+00 1.71E+02 Sample ID: 238763 Sample Dates: 5/29/2012 - 6/25/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <6.06E+00 0.00E+00 6.06E+00 Co-58 <8.30E+00 0.00E+00 8.30E+00 Fe-59 <1.37E+01 0.00E+00 1.37E+01 Co-60 <8.82E+00 0.00E+00 8.82E+00 Zn-65 <1.69E+01 0.00E+00 1.69E+01 Zr-95 <1.25E+01 0.00E+00 1.25E+01 Nb-95 <6.51E+00 0.00E+00 6.51E+00 I-131 <8.61E+00 0.00E+00 8.61E+00 Cs-134 <7.17E+00 0.00E+00 7.17E+00 Cs-137 <9.29E+00 0.00E+00 9.29E+00 BaLa-140 <1.01E+01 0.00E+00 1.01E+01 Be-7 <4.48E+01 0.00E+00 4.48E+01 K-40 <1.48E+02 0.00E+00 1.48E+02 Sample ID: 240370 Sample Dates: 6/25/2012 - 7/23/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <5.06E+00 0.00E+00 5.06E+00 Co-58 <5.54E+00 0.00E+00 5.54E+00 Fe-59 <8.74E+00 0.00E+00 8.74E+00 Co-60 <7.50E+00 0.00E+00 7.50E+00 Zn-65 <8.45E+00 0.00E+00 8.45E+00 Zr-95 <6.34E+00 0.00E+00 6.34E+00 Nb-95 <4.61E+00 0.00E+00 4.61E+00 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 94 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 240370 Sample Dates: 6/25/2012 - 7/23/2012 Nuclide Activity 1 Sigma Error LLD I-131 <5.53E+00 0.00E+00 5.53E+00 Cs-134 <4.30E+00 0.00E+00 4.30E+00 Cs-137 <7.25E+00 0.00E+00 7.25E+00 BaLa-140 <5.83E+00 0.00E+00 5.83E+00 Be-7 <4.32E+01 0.00E+00 4.32E+01 K-40 1.43E+02 3.12E+01 4.55E+01 Sample ID: 242160 Sample Dates: 7/23/2012 - 8/20/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <5.88E+00 0.00E+00 5.88E+00 Co-58 <5.01E+00 0.00E+00 5.01E+00 Fe-59 <9.65E+00 0.00E+00 9.65E+00 Co-60 <7.93E+00 0.00E+00 7.93E+00 Zn-65 <1.30E+01 0.00E+00 1.30E+01 Zr-95 <7.10E+00 0.00E+00 7.10E+00 Nb-95 <4.76E+00 0.00E+00 4.76E+00 I-131 <5.47E+00 0.00E+00 5.47E+00 Cs-134 <4.81E+00 0.00E+00 4.81E+00 Cs-137 <5.94E+00 0.00E+00 5.94E+00 BaLa-140 <4.55E+00 0.00E+00 4.55E+00 Be-7 <3.82E+01 0.00E+00 3.82E+01 K-40 2.16E+02 3.67E+01 4.90E+01 Sample ID: 242492 Sample Dates: 5/29/2012 - 8/20/2012 Nuclide Activity 1 Sigma Error LLD H3SW <-2.0E+01 0.00E+00 1.71E+02 Sample ID: 244179 Sample Dates: 8/20/2012 - 9/17/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <7.32E+00 0.00E+00 7.32E+00 Co-58 <6.14E+00 0.00E+00 6.14E+00 Fe-59 <1.29E+01 0.00E+00 1.29E+01 Co-60 <9.48E+00 0.00E+00 9.48E+00 Zn-65 <1.31E+01 0.00E+00 1.31E+01 Zr-95 <9.67E+00 0.00E+00 9.67E+00 Nb-95 <4.74E+00 0.00E+00 4.74E+00 I-131 <7.77E+00 0.00E+00 7.77E+00 Cs-134 <6.60E+00 0.00E+00 6.60E+00 Cs-137 <6.95E+00 0.00E+00 6.95E+00 BaLa-140 <1.09E+01 0.00E+00 1.09E+01 Be-7 <5.16E+01 0.00E+00 5.16E+01 K-40 <1.15E+02 0.00E+00 1.15E+02 Sample ID: 247134 Sample Dates: 9/17/2012 - 10/15/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <5.97E+00 0.00E+00 5.97E+00 Co-58 <7.72E+00 0.00E+00 7.72E+00 Fe-59 <1.26E+01 0.00E+00 1.26E+01 Co-60 <6.94E+00 0.00E+00 6.94E+00 Zn-65 <1.19E+01 0.00E+00 1.19E+01 Zr-95 <8.14E+00 0.00E+00 8.14E+00 Nb-95 <6.91E+00 0.00E+00 6.91E+00 I-131 <7.18E+00 0.00E+00 7.18E+00 Cs-134 <6.43E+00 0.00E+00 6.43E+00 Cs-137 <5.96E+00 0.00E+00 5.96E+00 BaLa-140 <2.71E+00 0.00E+00 2.71E+00 Be-7 <6.33E+01 0.00E+00 6.33E+01 K-40 <1.25E+02 0.00E+00 1.25E+02 Sample ID: 248386 Sample Dates: 10/15/2012 - 11/12/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <9.39E+00 0.00E+00 9.39E+00 Co-58 <6.96E+00 0.00E+00 6.96E+00 Fe-59 <1.74E+01 0.00E+00 1.74E+01 Co-60 <1.08E+01 0.00E+00 1.08E+01 Zn-65 <2.34E+01 0.00E+00 2.34E+01 Zr-95 <1.22E+01 0.00E+00 1.22E+01 Nb-95 <5.27E+00 0.00E+00 5.27E+00 I-131 <6.97E+00 0.00E+00 6.97E+00 Cs-134 <6.99E+00 0.00E+00 6.99E+00 Cs-137 <9.57E+00 0.00E+00 9.57E+00 BaLa-140 <8.06E+00 0.00E+00 8.06E+00 Be-7 <4.19E+01 0.00E+00 4.19E+01 K-40 1.57E+02 3.60E+01 7.27E+01 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 95 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 249034 Sample Dates: 11/12/2012 - 12/10/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <8.54E+00 0.00E+00 8.54E+00 Co-58 <8.56E+00 0.00E+00 8.56E+00 Fe-59 <1.21E+01 0.00E+00 1.21E+01 Co-60 <7.94E+00 0.00E+00 7.94E+00 Zn-65 <3.80E+00 0.00E+00 3.80E+00 Zr-95 <1.14E+01 0.00E+00 1.14E+01 Nb-95 <6.63E+00 0.00E+00 6.63E+00 I-131 <8.15E+00 0.00E+00 8.15E+00 Cs-134 <5.36E+00 0.00E+00 5.36E+00 Cs-137 <7.28E+00 0.00E+00 7.28E+00 BaLa-140 <9.81E+00 0.00E+00 9.81E+00 Be-7 <3.72E+01 0.00E+00 3.72E+01 K-40 1.40E+02 3.41E+01 8.92E+01 Sample ID: 249475 Sample Dates: 8/20/2012 - 12/10/2012 Nuclide Activity 1 Sigma Error LLD H3SW <-6.0E+01 0.00E+00 1.78E+02 Sample Point 063.1 [ INDICATOR - E @ 0.79 miles ]

Sample ID: 227350 Sample Dates: 12/12/2011 - 1/9/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <4.72E+00 0.00E+00 4.72E+00 Co-58 <3.36E+00 0.00E+00 3.36E+00 Fe-59 <9.97E+00 0.00E+00 9.97E+00 Co-60 <7.06E+00 0.00E+00 7.06E+00 Zn-65 <7.22E+00 0.00E+00 7.22E+00 Zr-95 <8.14E+00 0.00E+00 8.14E+00 Nb-95 <4.62E+00 0.00E+00 4.62E+00 I-131 <6.54E+00 0.00E+00 6.54E+00 Cs-134 <5.21E+00 0.00E+00 5.21E+00 Cs-137 <5.15E+00 0.00E+00 5.15E+00 BaLa-140 <6.55E+00 0.00E+00 6.55E+00 Be-7 <4.80E+01 0.00E+00 4.80E+01 K-40 2.47E+02 3.69E+01 3.72E+01 Sample ID: 229461 Sample Dates: 1/9/2012 - 2/6/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <5.11E+00 0.00E+00 5.11E+00 Co-58 <6.31E+00 0.00E+00 6.31E+00 Fe-59 <6.94E+00 0.00E+00 6.94E+00 Co-60 <7.80E+00 0.00E+00 7.80E+00 Zn-65 <1.37E+01 0.00E+00 1.37E+01 Zr-95 <1.25E+01 0.00E+00 1.25E+01 Nb-95 <7.64E+00 0.00E+00 7.64E+00 I-131 <7.83E+00 0.00E+00 7.83E+00 Cs-134 <5.36E+00 0.00E+00 5.36E+00 Cs-137 <6.17E+00 0.00E+00 6.17E+00 BaLa-140 <9.02E+00 0.00E+00 9.02E+00 Be-7 <4.54E+01 0.00E+00 4.54E+01 K-40 1.65E+02 3.18E+01 9.32E+01 Sample ID: 231155 Sample Dates: 12/12/2011 - 3/5/2012 Nuclide Activity 1 Sigma Error LLD H3SW 5.35E+03 1.13E+02 1.72E+02 Sample ID: 231681 Sample Dates: 2/6/2012 - 3/5/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <8.05E+00 0.00E+00 8.05E+00 Co-58 <7.91E+00 0.00E+00 7.91E+00 Fe-59 <1.63E+01 0.00E+00 1.63E+01 Co-60 <6.17E+00 0.00E+00 6.17E+00 Zn-65 <1.67E+01 0.00E+00 1.67E+01 Zr-95 <1.38E+01 0.00E+00 1.38E+01 Nb-95 <6.97E+00 0.00E+00 6.97E+00 I-131 <8.08E+00 0.00E+00 8.08E+00 Cs-134 <6.29E+00 0.00E+00 6.29E+00 Cs-137 <7.71E+00 0.00E+00 7.71E+00 BaLa-140 <1.31E+01 0.00E+00 1.31E+01 Be-7 <5.81E+01 0.00E+00 5.81E+01 K-40 1.00E+02 2.59E+01 8.50E+01 Sample ID: 234539 Sample Dates: 3/5/2012 - 4/2/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <5.51E+00 0.00E+00 5.51E+00 Co-58 <4.54E+00 0.00E+00 4.54E+00 Fe-59 <1.70E+01 0.00E+00 1.70E+01 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 96 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 234539 Sample Dates: 3/5/2012 - 4/2/2012 Nuclide Activity 1 Sigma Error LLD Co-60 <7.89E+00 0.00E+00 7.89E+00 Zn-65 <1.72E+01 0.00E+00 1.72E+01 Zr-95 <1.20E+01 0.00E+00 1.20E+01 Nb-95 <7.09E+00 0.00E+00 7.09E+00 I-131 <7.92E+00 0.00E+00 7.92E+00 Cs-134 <6.27E+00 0.00E+00 6.27E+00 Cs-137 <7.20E+00 0.00E+00 7.20E+00 BaLa-140 <1.18E+01 0.00E+00 1.18E+01 Be-7 <5.33E+01 0.00E+00 5.33E+01 K-40 <1.26E+02 0.00E+00 1.26E+02 Sample ID: 235767 Sample Dates: 4/2/2012 - 4/30/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <5.07E+00 0.00E+00 5.07E+00 Co-58 <4.47E+00 0.00E+00 4.47E+00 Fe-59 <1.02E+01 0.00E+00 1.02E+01 Co-60 <6.22E+00 0.00E+00 6.22E+00 Zn-65 <1.01E+01 0.00E+00 1.01E+01 Zr-95 <1.03E+01 0.00E+00 1.03E+01 Nb-95 <5.70E+00 0.00E+00 5.70E+00 I-131 <4.97E+00 0.00E+00 4.97E+00 Cs-134 <4.35E+00 0.00E+00 4.35E+00 Cs-137 <5.09E+00 0.00E+00 5.09E+00 BaLa-140 <6.36E+00 0.00E+00 6.36E+00 Be-7 <4.13E+01 0.00E+00 4.13E+01 K-40 5.09E+01 2.16E+01 6.18E+01 Sample ID: 236835 Sample Dates: 4/30/2012 - 5/29/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <8.11E+00 0.00E+00 8.11E+00 Co-58 <9.59E+00 0.00E+00 9.59E+00 Fe-59 <1.79E+01 0.00E+00 1.79E+01 Co-60 <7.61E+00 0.00E+00 7.61E+00 Zn-65 <1.83E+01 0.00E+00 1.83E+01 Zr-95 <1.35E+01 0.00E+00 1.35E+01 Nb-95 <9.97E+00 0.00E+00 9.97E+00 I-131 <8.99E+00 0.00E+00 8.99E+00 Cs-134 <8.16E+00 0.00E+00 8.16E+00 Cs-137 <8.05E+00 0.00E+00 8.05E+00 BaLa-140 <1.31E+01 0.00E+00 1.31E+01 Be-7 <6.11E+01 0.00E+00 6.11E+01 K-40 1.12E+02 4.82E+01 9.74E+01 Sample ID: 236895 Sample Dates: 3/5/2012 - 5/29/2012 Nuclide Activity 1 Sigma Error LLD H3SW 7.64E+03 1.30E+02 1.71E+02 Sample ID: 238764 Sample Dates: 5/29/2012 - 6/25/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <4.77E+00 0.00E+00 4.77E+00 Co-58 <4.32E+00 0.00E+00 4.32E+00 Fe-59 <9.76E+00 0.00E+00 9.76E+00 Co-60 <8.29E+00 0.00E+00 8.29E+00 Zn-65 <8.54E+00 0.00E+00 8.54E+00 Zr-95 <7.87E+00 0.00E+00 7.87E+00 Nb-95 <5.21E+00 0.00E+00 5.21E+00 I-131 <5.34E+00 0.00E+00 5.34E+00 Cs-134 <5.01E+00 0.00E+00 5.01E+00 Cs-137 <5.96E+00 0.00E+00 5.96E+00 BaLa-140 <7.17E+00 0.00E+00 7.17E+00 Be-7 <4.80E+01 0.00E+00 4.80E+01 K-40 7.42E+01 2.54E+01 5.16E+01 Sample ID: 240371 Sample Dates: 6/25/2012 - 7/23/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <5.34E+00 0.00E+00 5.34E+00 Co-58 <4.50E+00 0.00E+00 4.50E+00 Fe-59 <1.08E+01 0.00E+00 1.08E+01 Co-60 <6.44E+00 0.00E+00 6.44E+00 Zn-65 <8.21E+00 0.00E+00 8.21E+00 Zr-95 <8.39E+00 0.00E+00 8.39E+00 Nb-95 <4.14E+00 0.00E+00 4.14E+00 I-131 <5.07E+00 0.00E+00 5.07E+00 Cs-134 <5.29E+00 0.00E+00 5.29E+00 Cs-137 <4.93E+00 0.00E+00 4.93E+00 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 97 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 240371 Sample Dates: 6/25/2012 - 7/23/2012 Nuclide Activity 1 Sigma Error LLD BaLa-140 <6.15E+00 0.00E+00 6.15E+00 Be-7 <4.01E+01 0.00E+00 4.01E+01 K-40 9.78E+01 2.74E+01 3.31E+01 Sample ID: 242161 Sample Dates: 7/23/2012 - 8/20/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <5.39E+00 0.00E+00 5.39E+00 Co-58 <4.97E+00 0.00E+00 4.97E+00 Fe-59 <1.08E+01 0.00E+00 1.08E+01 Co-60 <6.44E+00 0.00E+00 6.44E+00 Zn-65 <1.21E+01 0.00E+00 1.21E+01 Zr-95 <8.81E+00 0.00E+00 8.81E+00 Nb-95 <5.72E+00 0.00E+00 5.72E+00 I-131 <6.30E+00 0.00E+00 6.30E+00 Cs-134 <3.95E+00 0.00E+00 3.95E+00 Cs-137 <6.49E+00 0.00E+00 6.49E+00 BaLa-140 <3.70E+00 0.00E+00 3.70E+00 Be-7 <4.04E+01 0.00E+00 4.04E+01 K-40 2.06E+02 2.82E+01 5.25E+01 Sample ID: 242493 Sample Dates: 5/29/2012 - 8/20/2012 Nuclide Activity 1 Sigma Error LLD H3SW 6.07E+03 1.19E+02 1.72E+02 Sample ID: 244180 Sample Dates: 8/20/2012 - 9/17/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <3.96E+00 0.00E+00 3.96E+00 Co-58 <4.49E+00 0.00E+00 4.49E+00 Fe-59 <8.39E+00 0.00E+00 8.39E+00 Co-60 <8.44E+00 0.00E+00 8.44E+00 Zn-65 <7.24E+00 0.00E+00 7.24E+00 Zr-95 <6.20E+00 0.00E+00 6.20E+00 Nb-95 <5.16E+00 0.00E+00 5.16E+00 I-131 <5.23E+00 0.00E+00 5.23E+00 Cs-134 <4.95E+00 0.00E+00 4.95E+00 Cs-137 <5.78E+00 0.00E+00 5.78E+00 BaLa-140 <7.03E+00 0.00E+00 7.03E+00 Be-7 <3.50E+01 0.00E+00 3.50E+01 K-40 8.55E+01 2.49E+01 5.73E+01 Sample ID: 247135 Sample Dates: 9/17/2012 - 10/15/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <7.00E+00 0.00E+00 7.00E+00 Co-58 <8.76E+00 0.00E+00 8.76E+00 Fe-59 <1.75E+01 0.00E+00 1.75E+01 Co-60 <7.89E+00 0.00E+00 7.89E+00 Zn-65 <1.58E+01 0.00E+00 1.58E+01 Zr-95 <1.44E+01 0.00E+00 1.44E+01 Nb-95 <8.15E+00 0.00E+00 8.15E+00 I-131 <7.21E+00 0.00E+00 7.21E+00 Cs-134 <8.52E+00 0.00E+00 8.52E+00 Cs-137 <9.44E+00 0.00E+00 9.44E+00 BaLa-140 <7.80E+00 0.00E+00 7.80E+00 Be-7 <5.40E+01 0.00E+00 5.40E+01 K-40 <1.67E+02 0.00E+00 1.67E+02 Sample ID: 248387 Sample Dates: 10/15/2012 - 11/12/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <4.43E+00 0.00E+00 4.43E+00 Co-58 <4.76E+00 0.00E+00 4.76E+00 Fe-59 <1.02E+01 0.00E+00 1.02E+01 Co-60 <4.37E+00 0.00E+00 4.37E+00 Zn-65 <8.20E+00 0.00E+00 8.20E+00 Zr-95 <9.47E+00 0.00E+00 9.47E+00 Nb-95 <6.00E+00 0.00E+00 6.00E+00 I-131 <6.62E+00 0.00E+00 6.62E+00 Cs-134 <4.77E+00 0.00E+00 4.77E+00 Cs-137 <6.82E+00 0.00E+00 6.82E+00 BaLa-140 <6.46E+00 0.00E+00 6.46E+00 Be-7 <4.71E+01 0.00E+00 4.71E+01 K-40 6.81E+01 2.93E+01 3.78E+01 Sample ID: 249035 Sample Dates: 11/12/2012 - 12/10/2012 Nuclide Activity 1 Sigma Error LLD Mn-54 <6.19E+00 0.00E+00 6.19E+00 Co-58 <4.56E+00 0.00E+00 4.56E+00 Fe-59 <9.63E+00 0.00E+00 9.63E+00 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 98 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 249035 Sample Dates: 11/12/2012 - 12/10/2012 Nuclide Activity 1 Sigma Error LLD Co-60 <9.39E+00 0.00E+00 9.39E+00 Zn-65 <1.22E+01 0.00E+00 1.22E+01 Zr-95 <9.14E+00 0.00E+00 9.14E+00 Nb-95 <7.57E+00 0.00E+00 7.57E+00 I-131 <6.75E+00 0.00E+00 6.75E+00 Cs-134 <5.27E+00 0.00E+00 5.27E+00 Cs-137 <5.86E+00 0.00E+00 5.86E+00 BaLa-140 <7.81E+00 0.00E+00 7.81E+00 Be-7 <4.92E+01 0.00E+00 4.92E+01 K-40 1.26E+02 2.26E+01 8.32E+01 Sample ID: 249476 Sample Dates: 8/20/2012 - 12/10/2012 Nuclide Activity 1 Sigma Error LLD H3SW 3.96E+03 1.03E+02 1.78E+02 Media Type: TLD Concentration (Activity): mR/Standard Quarter Sample Point 020 [ INDICATOR - N @ 0.16 miles ] TLD RING TLD_INNER Sample ID: 232852 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 22.0 Sample ID: 237538 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 19.0 Sample ID: 243904 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 19.0 Sample ID: 249559 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 20.0 Sample Point 021 [ INDICATOR - NNE @ 0.25 miles ] TLD RING TLD_INNER Sample ID: 232853 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 17.0 Sample ID: 237539 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 14.0 Sample ID: 243905 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 13.0 Sample ID: 249560 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 16.0 Sample Point 022 [ INDICATOR - NE @ 0.53 miles ] TLD RING TLD_INNER Sample ID: 232854 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 29.0 Sample ID: 237540 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 22.0 Sample ID: 243906 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 21.0 Sample ID: 249561 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 24.0 Sample Point 023 [ INDICATOR - ENE @ 0.93 miles ] TLD RING TLD_INNER Sample ID: 232855 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 26.0 Sample ID: 237541 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 24.0 Sample ID: 243907 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 21.0 Sample ID: 249562 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 24.0 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 99 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

Media Type: TLD Concentration (Activity): mR/Standard Quarter Sample Point 024 [ INDICATOR - E @ 0.79 miles ] TLD RING TLD_INNER Sample ID: 232856 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 30.0 Sample ID: 237542 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 26.0 Sample ID: 243908 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 23.0 Sample ID: 249563 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 27.0 Sample Point 025 [ INDICATOR - ESE @ 0.42 miles ] TLD RING TLD_INNER Sample ID: 232857 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 22.0 Sample ID: 237543 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 18.0 Sample ID: 243909 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 17.0 Sample ID: 249564 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 18.0 Sample Point 026 [ INDICATOR - SE @ 0.34 miles ] TLD RING TLD_INNER Sample ID: 232859 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 19.0 Sample ID: 237545 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 16.0 Sample ID: 243911 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 15.0 Sample ID: 249566 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 18.0 Sample Point 027 [ INDICATOR - SSE @ 0.49 miles ] TLD RING TLD_INNER Sample ID: 232860 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 23.0 Sample ID: 237546 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 20.0 Sample ID: 243912 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 19.0 Sample ID: 249567 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 22.0 Sample Point 028 [ INDICATOR - S @ 0.46 miles ] TLD RING TLD_INNER Sample ID: 232861 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 20.0 Sample ID: 237547 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 18.0 Sample ID: 243913 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 17.0 Sample ID: 249568 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 19.0 Sample Point 029 [ INDICATOR - SSW @ 0.56 miles ] TLD RING TLD_INNER Sample ID: 232862 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 18.0 Sample ID: 237548 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 16.0 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 100 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

Media Type: TLD Concentration (Activity): mR/Standard Quarter Sample Point 029 [ INDICATOR - SSW @ 0.56 miles ] TLD RING TLD_INNER Sample ID: 243914 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 14.0 Sample ID: 249569 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 18.0 Sample Point 030 [ INDICATOR - SW @ 0.42 miles ] TLD RING TLD_INNER Sample ID: 232863 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 21.0 Sample ID: 237549 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 18.0 Sample ID: 243915 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 16.0 Sample ID: 249570 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 19.0 Sample Point 031 [ INDICATOR - WSW @ 0.27 miles ] TLD RING TLD_INNER Sample ID: 232864 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 19.0 Sample ID: 237550 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 18.0 Sample ID: 243916 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 16.0 Sample ID: 249571 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 19.0 Sample Point 032 [ INDICATOR - WNW @ 0.19 miles ] TLD RING TLD_INNER Sample ID: 232865 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 27.0 Sample ID: 237551 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 24.0 Sample ID: 243917 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 22.0 Sample ID: 249572 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 26.0 Sample Point 033 [ INDICATOR - WNW @ 0.21 miles ] TLD RING TLD_INNER Sample ID: 232866 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 24.0 Sample ID: 237552 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 20.0 Sample ID: 243918 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 17.0 Sample ID: 249573 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 21.0 Sample Point 034 [ INDICATOR - NW @ 0.22 miles ] TLD RING TLD_INNER Sample ID: 232867 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 25.0 Sample ID: 237553 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 22.0 Sample ID: 243919 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 21.0 Sample ID: 249574 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 23.0 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 101 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

Media Type: TLD Concentration (Activity): mR/Standard Quarter Sample Point 035 [ INDICATOR - NNW @ 0.17 miles ] TLD RING TLD_INNER Sample ID: 232868 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 27.0 Sample ID: 237554 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 23.0 Sample ID: 243920 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 22.0 Sample ID: 249575 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 25.0 Sample Point 036 [ INDICATOR - N @ 4.18 miles ] TLD RING TLD_OUTER Sample ID: 232869 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 30.0 Sample ID: 237555 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 26.0 Sample ID: 243921 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 22.0 Sample ID: 249576 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 29.0 Sample Point 037 [ INDICATOR - NNE @ 4.85 miles ] TLD RING TLD_OUTER Sample ID: 232870 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 25.0 Sample ID: 237556 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 20.0 Sample ID: 243922 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 20.0 Sample ID: 249577 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 22.0 Sample Point 038 [ INDICATOR - NE @ 4.24 miles ] TLD RING TLD_OUTER Sample ID: 232871 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 27.0 Sample ID: 237557 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 21.0 Sample ID: 243923 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 19.0 Sample ID: 249578 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 23.0 Sample Point 039 [ INDICATOR - ENE @ 4.02 miles ] TLD RING TLD_OUTER Sample ID: 232872 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 29.0 Sample ID: 237558 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 24.0 Sample ID: 243924 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 22.0 Sample ID: 249579 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 27.0 Sample Point 040 [ INDICATOR - E @ 4.74 miles ] TLD RING TLD_OUTER Sample ID: 232873 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 29.0 Sample ID: 237559 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 26.0 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 102 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

Media Type: TLD Concentration (Activity): mR/Standard Quarter Sample Point 040 [ INDICATOR - E @ 4.74 miles ] TLD RING TLD_OUTER Sample ID: 243925 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 24.0 Sample ID: 249580 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 28.0 Sample Point 041 [ INDICATOR - ESE @ 4.25 miles ] TLD RING TLD_OUTER Sample ID: 232890 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 21.0 Sample ID: 237576 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 18.0 Sample ID: 243942 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 17.0 Sample ID: 249597 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 19.0 Sample Point 042 [ INDICATOR - SE @ 4.93 miles ] TLD RING TLD_OUTER Sample ID: 232874 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 31.0 Sample ID: 237560 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 26.0 Sample ID: 243926 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 24.0 Sample ID: 249581 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 26.0 Sample Point 043 [ INDICATOR - SSE @ 4.09 miles ] TLD RING TLD_OUTER Sample ID: 232875 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 28.0 Sample ID: 237561 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 25.0 Sample ID: 243927 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 24.0 Sample ID: 249582 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 27.0 Sample Point 044 [ INDICATOR - S @ 3.96 miles ] TLD RING TLD_OUTER Sample ID: 232876 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 24.0 Sample ID: 237562 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 20.0 Sample ID: 243928 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 18.0 Sample ID: 249583 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 21.0 Sample Point 045 [ INDICATOR - SSW @ 4.78 miles ] TLD RING TLD_OUTER Sample ID: 232877 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 19.0 Sample ID: 237563 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 17.0 Sample ID: 243929 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 17.0 Sample ID: 249584 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 19.0 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 103 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

Media Type: TLD Concentration (Activity): mR/Standard Quarter Sample Point 046 [ INDICATOR - SW @ 4.61 miles ] TLD RING TLD_OUTER Sample ID: 232878 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 27.0 Sample ID: 237564 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 24.0 Sample ID: 243930 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 21.0 Sample ID: 249585 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 26.0 Sample Point 047 [ INDICATOR - WSW @ 3.58 miles ] TLD RING TLD_OUTER Sample ID: 232879 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 27.0 Sample ID: 237565 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 22.0 Sample ID: 243931 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 21.0 Sample ID: 249586 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 24.0 Sample Point 048 [ INDICATOR - W @ 3.64 miles ] TLD RING TLD_OUTER Sample ID: 232880 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 29.0 Sample ID: 237566 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 25.0 Sample ID: 243932 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 24.0 Sample ID: 249587 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 26.0 Sample Point 049 [ INDICATOR - WNW @ 3.6 miles ] TLD RING TLD_OUTER Sample ID: 232881 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 26.0 Sample ID: 237567 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 22.0 Sample ID: 243933 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 21.0 Sample ID: 249588 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 25.0 Sample Point 050 [ INDICATOR - NW @ 3.53 miles ] TLD RING TLD_OUTER Sample ID: 232882 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 21.0 Sample ID: 237568 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 18.0 Sample ID: 243934 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 17.0 Sample ID: 249589 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 20.0 Sample Point 051 [ INDICATOR - NNW @ 4.64 miles ] TLD RING TLD_OUTER Sample ID: 232883 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 22.0 Sample ID: 237569 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 19.0 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 104 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

Media Type: TLD Concentration (Activity): mR/Standard Quarter Sample Point 051 [ INDICATOR - NNW @ 4.64 miles ] TLD RING TLD_OUTER Sample ID: 243935 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 19.0 Sample ID: 249590 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 21.0 Sample Point 052 [ INDICATOR - ENE @ 12.4 miles ] TLD RING TLD_SPEC Sample ID: 232884 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 29.0 Sample ID: 237570 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 23.0 Sample ID: 243936 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 22.0 Sample ID: 249591 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 28.0 Sample Point 053 [ INDICATOR - E @ 11.7 miles ] TLD RING TLD_SPEC Sample ID: 232885 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 30.0 Sample ID: 237571 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 25.0 Sample ID: 243937 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 23.0 Sample ID: 249592 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 27.0 Sample Point 054 [ INDICATOR - ESE @ 8.6 miles ] TLD RING TLD_SPEC Sample ID: 232886 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 23.0 Sample ID: 237572 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 20.0 Sample ID: 243938 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 18.0 Sample ID: 249593 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 21.0 Sample Point 055 [ INDICATOR - SSE @ 9.27 miles ] TLD RING TLD_SPEC Sample ID: 232887 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 18.0 Sample ID: 237573 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 16.0 Sample ID: 243939 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 14.0 Sample ID: 249594 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 17.0 Sample Point 056 [ INDICATOR - SSW @ 7.3 miles ] TLD RING TLD_SPEC Sample ID: 232888 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 26.0 Sample ID: 237574 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 22.0 Sample ID: 243940 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 21.0 Sample ID: 249595 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 28.0 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 105 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

Media Type: TLD Concentration (Activity): mR/Standard Quarter Sample Point 057 [ INDICATOR - SW @ 8.42 miles ] TLD RING TLD_SPEC Sample ID: 232889 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 28.0 Sample ID: 237575 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 24.0 Sample ID: 243941 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 26.0 Sample ID: 249596 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 24.0 Sample Point 058 [ CONTROL - WSW @ 9.39 miles ] TLD RING TLD_CTRL Sample ID: 232891 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 36.0 Sample ID: 237577 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 31.0 Sample ID: 243943 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 27.0 Sample ID: 249598 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 31.0 Sample Point 059 [ INDICATOR - NW @ 9.2 miles ] TLD RING TLD_SPEC Sample ID: 232892 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 29.0 Sample ID: 237578 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 23.0 Sample ID: 243944 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 23.0 Sample ID: 249599 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 28.0 Sample Point 076 [ INDICATOR - W @ 0.19 miles ] TLD RING TLD_INNER Sample ID: 232893 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 26.0 Sample ID: 237579 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 22.0 Sample ID: 243945 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 21.0 Sample ID: 249600 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 24.0 Sample Point 081 [ CONTROL - SE @ 9.33 miles ] TLD RING TLD_CTRL Sample ID: 232894 Sample Dates: 12/13/2011 - 3/13/2012 Nuclide Activity mR/Std Qtr 27.0 Sample ID: 237580 Sample Dates: 3/13/2012 - 6/12/2012 Nuclide Activity mR/Std Qtr 23.0 Sample ID: 243946 Sample Dates: 6/12/2012 - 9/11/2012 Nuclide Activity mR/Std Qtr 21.0 Sample ID: 249601 Sample Dates: 9/11/2012 - 12/11/2012 Nuclide Activity mR/Std Qtr 25.0 Media Type: VEGETATION Concentration (Activity): pCi/kg Sample Point 077 [ INDICATOR - SW @ 1 miles ]

Sample ID: 226933 Sample Dates: 1/3/2012 - 1/3/2012 Nuclide Activity 1 Sigma Error LLD I-131 <3.57E+01 0.00E+00 3.57E+01 Cs-134 <3.21E+01 0.00E+00 3.21E+01 Cs-137 <3.61E+01 0.00E+00 3.61E+01 Be-7 1.50E+03 2.09E+02 3.21E+02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 106 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 226933 Sample Dates: 1/3/2012 - 1/3/2012 Nuclide Activity 1 Sigma Error LLD K-40 3.08E+03 2.99E+02 3.98E+02 Sample ID: 227928 Sample Dates: 2/6/2012 - 2/6/2012 Nuclide Activity 1 Sigma Error LLD I-131 <2.52E+01 0.00E+00 2.52E+01 Cs-134 <2.76E+01 0.00E+00 2.76E+01 Cs-137 <4.33E+01 0.00E+00 4.33E+01 Be-7 7.66E+02 1.74E+02 2.77E+02 K-40 2.29E+03 3.46E+02 4.55E+02 Sample ID: 230880 Sample Dates: 3/5/2012 - 3/5/2012 Nuclide Activity 1 Sigma Error LLD I-131 <3.16E+01 0.00E+00 3.16E+01 Cs-134 <2.67E+01 0.00E+00 2.67E+01 Cs-137 <2.69E+01 0.00E+00 2.69E+01 Be-7 1.58E+03 1.63E+02 1.84E+02 K-40 3.28E+03 3.04E+02 2.52E+02 Sample ID: 233484 Sample Dates: 4/2/2012 - 4/2/2012 Nuclide Activity 1 Sigma Error LLD I-131 <2.68E+01 0.00E+00 2.68E+01 Cs-134 <2.99E+01 0.00E+00 2.99E+01 Cs-137 <3.87E+01 0.00E+00 3.87E+01 Be-7 4.51E+02 1.27E+02 2.56E+02 K-40 3.90E+03 3.65E+02 2.50E+02 Sample ID: 235420 Sample Dates: 5/7/2012 - 5/7/2012 Nuclide Activity 1 Sigma Error LLD I-131 <2.89E+01 0.00E+00 2.89E+01 Cs-134 <2.44E+01 0.00E+00 2.44E+01 Cs-137 <3.11E+01 0.00E+00 3.11E+01 Be-7 1.16E+03 1.42E+02 2.02E+02 K-40 4.49E+03 3.63E+02 7.93E+01 Sample ID: 236732 Sample Dates: 6/4/2012 - 6/4/2012 Nuclide Activity 1 Sigma Error LLD I-131 <2.64E+01 0.00E+00 2.64E+01 Cs-134 <2.92E+01 0.00E+00 2.92E+01 Cs-137 <3.01E+01 0.00E+00 3.01E+01 Be-7 6.22E+02 1.15E+02 2.42E+02 K-40 3.93E+03 3.36E+02 3.00E+02 Sample ID: 238699 Sample Dates: 7/2/2012 - 7/2/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.72E+01 0.00E+00 1.72E+01 Cs-134 <1.55E+01 0.00E+00 1.55E+01 Cs-137 <2.12E+01 0.00E+00 2.12E+01 Be-7 1.82E+03 1.20E+02 1.18E+02 K-40 5.07E+03 2.71E+02 1.48E+02 Sample ID: 240342 Sample Dates: 8/6/2012 - 8/6/2012 Nuclide Activity 1 Sigma Error LLD I-131 <2.08E+01 0.00E+00 2.08E+01 Cs-134 <2.04E+01 0.00E+00 2.04E+01 Cs-137 <2.17E+01 0.00E+00 2.17E+01 Be-7 1.80E+03 1.54E+02 1.54E+02 K-40 4.26E+03 2.81E+02 2.43E+02 Sample ID: 242213 Sample Dates: 9/4/2012 - 9/4/2012 Nuclide Activity 1 Sigma Error LLD I-131 <2.95E+01 0.00E+00 2.95E+01 Cs-134 <2.77E+01 0.00E+00 2.77E+01 Cs-137 <2.65E+01 0.00E+00 2.65E+01 Be-7 1.37E+03 1.80E+02 2.61E+02 K-40 2.41E+03 3.20E+02 9.17E+01 Sample ID: 244912 Sample Dates: 10/1/2012 - 10/1/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.90E+01 0.00E+00 1.90E+01 Cs-134 <2.98E+01 0.00E+00 2.98E+01 Cs-137 <2.91E+01 0.00E+00 2.91E+01 Be-7 2.37E+03 2.02E+02 2.47E+02 K-40 2.02E+03 2.68E+02 3.26E+02 Sample ID: 247388 Sample Dates: 11/5/2012 - 11/5/2012 Nuclide Activity 1 Sigma Error LLD I-131 <3.51E+01 0.00E+00 3.51E+01 Cs-134 <3.57E+01 0.00E+00 3.57E+01 Cs-137 <4.01E+01 0.00E+00 4.01E+01 Be-7 2.33E+03 2.07E+02 3.45E+02 K-40 3.55E+03 3.95E+02 3.19E+02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 107 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 248657 Sample Dates: 12/3/2012 - 12/3/2012 Nuclide Activity 1 Sigma Error LLD I-131 <3.39E+01 0.00E+00 3.39E+01 Cs-134 <2.91E+01 0.00E+00 2.91E+01 Cs-137 <3.47E+01 0.00E+00 3.47E+01 Be-7 8.51E+02 1.76E+02 2.18E+02 K-40 2.37E+03 2.83E+02 2.46E+02 Sample Point 079 [ INDICATOR - NE @ 0.56 miles ]

Sample ID: 226935 Sample Dates: 1/3/2012 - 1/3/2012 Nuclide Activity 1 Sigma Error LLD I-131 <3.88E+01 0.00E+00 3.88E+01 Cs-134 <4.02E+01 0.00E+00 4.02E+01 Cs-137 <4.75E+01 0.00E+00 4.75E+01 Be-7 1.32E+03 2.89E+02 3.50E+02 K-40 2.79E+03 4.01E+02 4.34E+02 Sample ID: 227930 Sample Dates: 2/6/2012 - 2/6/2012 Nuclide Activity 1 Sigma Error LLD I-131 <2.59E+01 0.00E+00 2.59E+01 Cs-134 <2.06E+01 0.00E+00 2.06E+01 Cs-137 <3.18E+01 0.00E+00 3.18E+01 Be-7 1.72E+03 1.51E+02 2.06E+02 K-40 3.30E+03 3.47E+02 4.39E+02 Sample ID: 230882 Sample Dates: 3/5/2012 - 3/5/2012 Nuclide Activity 1 Sigma Error LLD I-131 <3.46E+01 0.00E+00 3.46E+01 Cs-134 <3.51E+01 0.00E+00 3.51E+01 Cs-137 <4.52E+01 0.00E+00 4.52E+01 Be-7 1.58E+03 1.74E+02 2.51E+02 K-40 2.85E+03 3.62E+02 4.92E+02 Sample ID: 233486 Sample Dates: 4/2/2012 - 4/2/2012 Nuclide Activity 1 Sigma Error LLD I-131 <2.35E+01 0.00E+00 2.35E+01 Cs-134 <2.02E+01 0.00E+00 2.02E+01 Cs-137 <2.48E+01 0.00E+00 2.48E+01 Be-7 6.97E+02 1.04E+02 1.76E+02 K-40 3.99E+03 2.79E+02 2.54E+02 Sample ID: 235422 Sample Dates: 5/7/2012 - 5/7/2012 Nuclide Activity 1 Sigma Error LLD I-131 <2.39E+01 0.00E+00 2.39E+01 Cs-134 <2.02E+01 0.00E+00 2.02E+01 Cs-137 <2.36E+01 0.00E+00 2.36E+01 Be-7 6.71E+02 9.04E+01 1.31E+02 K-40 4.39E+03 3.06E+02 1.98E+02 Sample ID: 236734 Sample Dates: 6/4/2012 - 6/4/2012 Nuclide Activity 1 Sigma Error LLD I-131 <3.29E+01 0.00E+00 3.29E+01 Cs-134 <3.45E+01 0.00E+00 3.45E+01 Cs-137 <4.12E+01 0.00E+00 4.12E+01 Be-7 3.45E+02 1.44E+02 2.89E+02 K-40 3.35E+03 3.72E+02 2.96E+02 Sample ID: 238701 Sample Dates: 7/2/2012 - 7/2/2012 Nuclide Activity 1 Sigma Error LLD I-131 <4.19E+01 0.00E+00 4.19E+01 Cs-134 <4.09E+01 0.00E+00 4.09E+01 Cs-137 <4.97E+01 0.00E+00 4.97E+01 Be-7 6.90E+02 1.37E+02 3.05E+02 K-40 3.97E+03 4.30E+02 3.38E+02 Sample ID: 240344 Sample Dates: 8/6/2012 - 8/6/2012 Nuclide Activity 1 Sigma Error LLD I-131 <3.71E+01 0.00E+00 3.71E+01 Cs-134 <2.66E+01 0.00E+00 2.66E+01 Cs-137 <3.56E+01 0.00E+00 3.56E+01 Be-7 1.22E+03 1.60E+02 2.50E+02 K-40 3.81E+03 3.91E+02 2.91E+02 Sample ID: 242215 Sample Dates: 9/4/2012 - 9/4/2012 Nuclide Activity 1 Sigma Error LLD I-131 <2.30E+01 0.00E+00 2.30E+01 Cs-134 <2.14E+01 0.00E+00 2.14E+01 Cs-137 <2.53E+01 0.00E+00 2.53E+01 Be-7 1.42E+03 1.19E+02 1.68E+02 K-40 3.26E+03 2.39E+02 2.17E+02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 108 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 244913 Sample Dates: 10/1/2012 - 10/1/2012 Nuclide Activity 1 Sigma Error LLD I-131 <3.68E+01 0.00E+00 3.68E+01 Cs-134 <3.07E+01 0.00E+00 3.07E+01 Cs-137 <3.79E+01 0.00E+00 3.79E+01 Be-7 1.22E+03 1.67E+02 2.42E+02 K-40 4.90E+03 3.61E+02 3.07E+02 Sample ID: 247389 Sample Dates: 11/5/2012 - 11/5/2012 Nuclide Activity 1 Sigma Error LLD I-131 <2.52E+01 0.00E+00 2.52E+01 Cs-134 <3.05E+01 0.00E+00 3.05E+01 Cs-137 <3.22E+01 0.00E+00 3.22E+01 Be-7 8.95E+02 1.19E+02 2.01E+02 K-40 2.46E+03 3.07E+02 2.95E+02 Sample ID: 248658 Sample Dates: 12/3/2012 - 12/3/2012 Nuclide Activity 1 Sigma Error LLD I-131 <3.05E+01 0.00E+00 3.05E+01 Cs-134 <4.45E+01 0.00E+00 4.45E+01 Cs-137 <4.00E+01 0.00E+00 4.00E+01 Be-7 1.12E+03 1.69E+02 1.82E+02 K-40 2.58E+03 3.48E+02 3.37E+02 Sample Point 081 [ CONTROL - SE @ 9.33 miles ]

Sample ID: 226936 Sample Dates: 1/3/2012 - 1/3/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.80E+01 0.00E+00 1.80E+01 Cs-134 <2.47E+01 0.00E+00 2.47E+01 Cs-137 <1.96E+01 0.00E+00 1.96E+01 Be-7 5.02E+02 8.67E+01 1.57E+02 K-40 2.92E+03 2.55E+02 3.30E+02 Sample ID: 227931 Sample Dates: 2/6/2012 - 2/6/2012 Nuclide Activity 1 Sigma Error LLD I-131 <2.14E+01 0.00E+00 2.14E+01 Cs-134 <2.56E+01 0.00E+00 2.56E+01 Cs-137 <3.53E+01 0.00E+00 3.53E+01 Be-7 8.96E+02 1.33E+02 2.05E+02 K-40 4.06E+03 3.21E+02 2.09E+02 Sample ID: 230883 Sample Dates: 3/5/2012 - 3/5/2012 Nuclide Activity 1 Sigma Error LLD I-131 <2.71E+01 0.00E+00 2.71E+01 Cs-134 <2.66E+01 0.00E+00 2.66E+01 Cs-137 <3.14E+01 0.00E+00 3.14E+01 Be-7 1.35E+03 1.44E+02 1.94E+02 K-40 4.57E+03 3.35E+02 1.74E+02 Sample ID: 233487 Sample Dates: 4/2/2012 - 4/2/2012 Nuclide Activity 1 Sigma Error LLD I-131 <2.59E+01 0.00E+00 2.59E+01 Cs-134 <2.65E+01 0.00E+00 2.65E+01 Cs-137 <2.93E+01 0.00E+00 2.93E+01 Be-7 3.68E+02 1.14E+02 2.12E+02 K-40 4.17E+03 3.90E+02 3.36E+02 Sample ID: 235423 Sample Dates: 5/7/2012 - 5/7/2012 Nuclide Activity 1 Sigma Error LLD I-131 <2.01E+01 0.00E+00 2.01E+01 Cs-134 <1.83E+01 0.00E+00 1.83E+01 Cs-137 <2.00E+01 0.00E+00 2.00E+01 Be-7 5.11E+02 6.98E+01 1.19E+02 K-40 3.54E+03 2.68E+02 2.14E+02 Sample ID: 236735 Sample Dates: 6/4/2012 - 6/4/2012 Nuclide Activity 1 Sigma Error LLD I-131 <3.43E+01 0.00E+00 3.43E+01 Cs-134 <2.65E+01 0.00E+00 2.65E+01 Cs-137 <3.63E+01 0.00E+00 3.63E+01 Be-7 1.15E+03 1.20E+02 1.85E+02 K-40 2.73E+03 3.32E+02 1.91E+02 Sample ID: 238702 Sample Dates: 7/2/2012 - 7/2/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.62E+01 0.00E+00 1.62E+01 Cs-134 <1.94E+01 0.00E+00 1.94E+01 Cs-137 <2.37E+01 0.00E+00 2.37E+01 Be-7 1.15E+03 1.15E+02 1.32E+02 K-40 3.87E+03 2.87E+02 2.30E+02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 109 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 240345 Sample Dates: 8/6/2012 - 8/6/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.62E+01 0.00E+00 1.62E+01 Cs-134 <1.83E+01 0.00E+00 1.83E+01 Cs-137 <1.85E+01 0.00E+00 1.85E+01 Be-7 9.66E+02 1.19E+02 1.61E+02 K-40 2.40E+03 2.12E+02 1.71E+02 Sample ID: 242216 Sample Dates: 9/4/2012 - 9/4/2012 Nuclide Activity 1 Sigma Error LLD I-131 <2.52E+01 0.00E+00 2.52E+01 Cs-134 <2.38E+01 0.00E+00 2.38E+01 Cs-137 <2.73E+01 0.00E+00 2.73E+01 Be-7 1.19E+03 1.85E+02 1.99E+02 K-40 3.15E+03 3.30E+02 9.36E+01 Sample ID: 244914 Sample Dates: 10/1/2012 - 10/1/2012 Nuclide Activity 1 Sigma Error LLD I-131 <3.00E+01 0.00E+00 3.00E+01 Cs-134 <2.79E+01 0.00E+00 2.79E+01 Cs-137 <3.81E+01 0.00E+00 3.81E+01 Be-7 1.07E+03 1.52E+02 2.17E+02 K-40 2.68E+03 3.39E+02 3.25E+02 Sample ID: 247390 Sample Dates: 11/5/2012 - 11/5/2012 Nuclide Activity 1 Sigma Error LLD I-131 <2.34E+01 0.00E+00 2.34E+01 Cs-134 <2.30E+01 0.00E+00 2.30E+01 Cs-137 <3.21E+01 0.00E+00 3.21E+01 Be-7 6.45E+02 1.24E+02 2.15E+02 K-40 5.18E+03 3.56E+02 2.11E+02 Sample ID: 248659 Sample Dates: 12/3/2012 - 12/3/2012 Nuclide Activity 1 Sigma Error LLD I-131 <2.46E+01 0.00E+00 2.46E+01 Cs-134 <2.94E+01 0.00E+00 2.94E+01 Cs-137 <3.96E+01 0.00E+00 3.96E+01 Be-7 1.00E+03 1.59E+02 2.01E+02 K-40 4.76E+03 3.57E+02 2.67E+02 Sample Point 084 [ INDICATOR - NNE @ 2.58 miles ]

Sample ID: 226937 Sample Dates: 1/3/2012 - 1/3/2012 Nuclide Activity 1 Sigma Error LLD I-131 <3.14E+01 0.00E+00 3.14E+01 Cs-134 <2.41E+01 0.00E+00 2.41E+01 Cs-137 <2.80E+01 0.00E+00 2.80E+01 Be-7 5.51E+03 2.50E+02 2.11E+02 K-40 5.18E+03 3.35E+02 1.94E+02 Sample ID: 227932 Sample Dates: 2/6/2012 - 2/6/2012 Nuclide Activity 1 Sigma Error LLD I-131 <2.47E+01 0.00E+00 2.47E+01 Cs-134 <2.43E+01 0.00E+00 2.43E+01 Cs-137 <3.10E+01 0.00E+00 3.10E+01 Be-7 4.88E+03 2.28E+02 2.01E+02 K-40 3.78E+03 2.88E+02 2.73E+02 Sample ID: 230884 Sample Dates: 3/5/2012 - 3/5/2012 Nuclide Activity 1 Sigma Error LLD I-131 <2.70E+01 0.00E+00 2.70E+01 Cs-134 <2.76E+01 0.00E+00 2.76E+01 Cs-137 <2.47E+01 0.00E+00 2.47E+01 Be-7 4.74E+03 2.29E+02 1.81E+02 K-40 3.76E+03 2.89E+02 2.45E+02 Sample ID: 233488 Sample Dates: 4/2/2012 - 4/2/2012 Nuclide Activity 1 Sigma Error LLD I-131 <2.75E+01 0.00E+00 2.75E+01 Cs-134 <2.60E+01 0.00E+00 2.60E+01 Cs-137 <2.80E+01 0.00E+00 2.80E+01 Be-7 2.76E+02 1.08E+02 1.79E+02 K-40 4.10E+03 3.09E+02 2.60E+02 Sample ID: 235424 Sample Dates: 5/7/2012 - 5/7/2012 Nuclide Activity 1 Sigma Error LLD I-131 <1.86E+01 0.00E+00 1.86E+01 Cs-134 <1.64E+01 0.00E+00 1.64E+01 Cs-137 <1.66E+01 0.00E+00 1.66E+01 Be-7 4.59E+02 6.84E+01 1.28E+02 K-40 3.08E+03 2.10E+02 1.83E+02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 110 of 111 Duke Energy Annual Report - Appendix E 13339 Hagers Ferry Road Huntersville, North Carolina 28078

OCONEE Radiological Environmental Monitoring Analysis Report - 2012 (Appendix E)

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

Sample ID: 236736 Sample Dates: 6/4/2012 - 6/4/2012 Nuclide Activity 1 Sigma Error LLD I-131 <3.76E+01 0.00E+00 3.76E+01 Cs-134 <3.45E+01 0.00E+00 3.45E+01 Cs-137 <3.26E+01 0.00E+00 3.26E+01 Be-7 5.00E+02 1.19E+02 2.68E+02 K-40 3.32E+03 3.20E+02 3.85E+02 Sample ID: 238703 Sample Dates: 7/2/2012 - 7/2/2012 Nuclide Activity 1 Sigma Error LLD I-131 <2.22E+01 0.00E+00 2.22E+01 Cs-134 <2.61E+01 0.00E+00 2.61E+01 Cs-137 <2.74E+01 0.00E+00 2.74E+01 Be-7 1.04E+03 1.16E+02 2.29E+02 K-40 2.38E+03 2.84E+02 9.18E+01 Sample ID: 240346 Sample Dates: 8/6/2012 - 8/6/2012 Nuclide Activity 1 Sigma Error LLD I-131 <2.64E+01 0.00E+00 2.64E+01 Cs-134 <3.58E+01 0.00E+00 3.58E+01 Cs-137 <2.72E+01 0.00E+00 2.72E+01 Be-7 1.26E+03 1.78E+02 2.04E+02 K-40 2.02E+03 3.60E+02 4.17E+02 Sample ID: 242217 Sample Dates: 9/4/2012 - 9/4/2012 Nuclide Activity 1 Sigma Error LLD I-131 <2.50E+01 0.00E+00 2.50E+01 Cs-134 <3.17E+01 0.00E+00 3.17E+01 Cs-137 <3.71E+01 0.00E+00 3.71E+01 Be-7 1.00E+03 1.45E+02 2.35E+02 K-40 2.10E+03 2.84E+02 3.71E+02 Sample ID: 244916 Sample Dates: 10/1/2012 - 10/1/2012 Nuclide Activity 1 Sigma Error LLD I-131 <2.94E+01 0.00E+00 2.94E+01 Cs-134 <2.28E+01 0.00E+00 2.28E+01 Cs-137 <3.36E+01 0.00E+00 3.36E+01 Be-7 1.34E+03 1.38E+02 1.95E+02 K-40 3.02E+03 3.20E+02 3.10E+02 Sample ID: 247392 Sample Dates: 11/5/2012 - 11/5/2012 Nuclide Activity 1 Sigma Error LLD I-131 <3.39E+01 0.00E+00 3.39E+01 Cs-134 <2.84E+01 0.00E+00 2.84E+01 Cs-137 <3.95E+01 0.00E+00 3.95E+01 Be-7 1.64E+03 2.00E+02 2.80E+02 K-40 3.09E+03 3.55E+02 4.35E+02 Sample ID: 248661 Sample Dates: 12/3/2012 - 12/3/2012 Nuclide Activity 1 Sigma Error LLD I-131 <2.64E+01 0.00E+00 2.64E+01 Cs-134 <2.59E+01 0.00E+00 2.59E+01 Cs-137 <3.00E+01 0.00E+00 3.00E+01 Be-7 1.37E+03 1.52E+02 1.96E+02 K-40 2.36E+03 2.80E+02 3.35E+02 Report Generated @ 4/4/2013 16:31:52 EnRad Laboratories Appendix E - Page 111 of 111 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 2012 AREOR There are no errata to be appended to the 2012 AREOR.

Appendix F - Page 2

ML13175A174

Contents

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SUMMARY

2.0 INTRODUCTION

6.0 REFERENCES

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ML13175A174

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SUMMARY

2.0 INTRODUCTION

6.0 REFERENCES

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