ML18134A043

Annual Radiological Environmental Operating Report

ML18134A043
Person / Time
Site:	San Onofre
Issue date:	04/30/2018
From:	Chesapeake Nuclear Services, GEL Labs, Southern California Edison Co
To:	Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation
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ML18134A032	List: ML18134A042 ML18134A043
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Download: ML18134A043 (119)

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{{#Wiki_filter:2017 San Onofre Nuclear Generating Station Annual Radiological Environmental Operating Report E U DISORN License Numbers: DPR-13, NPF-10, NPF-15 An ED I SON INTERNATIONAL 1 Company April 2018 Prepared by: Chesape ke N dear Service m =i

• I L aboratories LLC a member of The GEL Group INC 2017 AREOR This 2017 Annual Radiolog i cal Environmental Operating Report (AREOR) for the San Onofre Nuclear Generating Station (SONGS) fulfills the requirements of Technical Specifications (TS} Section §D6.9.1.3 of SONGS Unit 1 License DPR-13 , Section §5.7.1.2 of the permanently defueled SONGS Un i ts 2 and 3 Licenses NPF-1 0 and NPF-15, respect i vely , and the Independent Spent Fuel Storage Installat i on (ISFSI) facility. The 2017 AREOR covers the results of the environmental monitoring performed around SONGS dur i ng the ti me period January 1 , 2017 through December 31 , 2017. Page Ii 2017 AREOR Table of Contents 1 Executive Summary ...............

............................... ................ ........................ ............. .......... 1 2 Radiological Environmental Monitoring Program .............................. .................................... 2 2.1 Program Overview ..................... .............................. ................. ................................... 2 2.2 Site Area and Description ................................ ............................. ................ ............... 3 2.3 Sample Collection and Analyses ................................................................................. 6 2.3.1 Detection Limit Terminology ................................ ...................... .......................... 7 2.4 Regulations and Guidance ...................................... .................................................... 8 2.5 NRC Reporting Levels ...................... ..................... ................................... .................. 10 2.6 Summary of Analysis of Results and Trends .................................... ............ .............. 10 3 Land Use Census ........................ .......................... ..................... ........................ ................. 12 4 Quality Assurance ............................................................................. ................. ............. .... 12 5 Program Deviations .............. .................................... .................... .................... ........... ........ 13 6 Conclus i on ............................................ .................... .......................................................... 13 7 Re f erences ............................... ..................... ...................................................................... 13 APPENDIX A. SAMPLE TYPE AND SAM PUNG LOCATIONS ................................................. 14 APPENDIX B. RESULTS AND DISCUSSIONS OF 2017 ENVIRONMENTAL DATA ................ 26 A. Results and Discussions of 2017 Environmental Data ................................................... 28 1. Direct Radiation ...................... ....................... ................................... .................... 28 2. Airborne Particulate, Iodine , and Composite Isotopic Analyses .................... ......... 33 3. Ocean Water .................................................... ........... ........................ ................. 34 4. Drinking Water ......................................................................................... ............. 34 5. Shoreline Sediment (Beach Sand) ...................... .................................................. 34 6. Ocean Bottom Sediments ......................................... .............................. .............. 34 7. Marine Species (Flesh) ........................................ ................................................. 35 8. Local Crops .................... .......................... ............................. ............ ................... 35 9. Soil ........................... .................. ..................... ................................................... .. 35 10. Kelp ..................................... ................. ................................................. ............... 36 Page I ii 2017 AREOR 11. Correlation of Effluent Concentration to Concentrations in the Environment ......... 37 B. Statistical Summary of REMP Data For 2017 ................. ............................................... 39 APPENDIX C.

SUMMARY

OF QUALITY CONTROL PROGRAMS ...................... ........... ........ .45 A. Summary ................... ............................ ........................................ ................................ 46 B. Quarterly Duplicate TLDs ......................... .................................................. .......... ........ .46 C. Annual Duplicate TLDs .................................................................................................. 46 D. Calibration of Air Sampler Volume Meters .............................. ................................ ...... .46 E. lnterlaboratory Cross-Check Program: ......................................................................... .47 F. Analytical Laboratory Cross Check Program Summary ................................................ .48 APPENDIX D. COMPARISON OF OPERATIONAL TO PREOPERATIONAL DATA ................. 67 A. Direct Radiation .............................................................. ..................... .......................... 69 8. Airborne Particulates ............... ................................................................................... ... 69 C. Radioiodine ................ ................................................ ................................................... 70 D. Ocean Water .......................... ..................................................... .................................. 70 E. Drinking Water .......................................... ................. ........... ......................................... 71 F. Shoreline Sediments (Sand) ....................................................... ................................... 71 G. Ocean Bottom Sediments ................................ ................ ......................... ..................... 72 H. Marine Species (Flesh) ................................................... ........................................ ....... 73 I. Local Crops ................................................................ ................................ ........... ........ 74 J. Soil .................................... ............................................................................................ 75 K. Kelp .................................. ...................... .............. .......................... ................... ............ 75 APPENDIX E. DEVIATIONS FROM ODCM SAMPLING REQUIREMENTS IN 2017 ................ 77 A. Direct Radiation .................................................. .......... ................. ................. ............... 78 B. Air Sampling .............. ..................................................... ....................... ........................ 78 C. Ocean Water Sampling .............................................................................. ............ ....... 78 D. Dr i nking Water ............................................................................................................... 79 E. Shoreline Sediments ................................................................................ ..................... 79 Page I iii 2017 AREOR F. Ocean Bottom Sediments .................................................... .......................................... 79 G. Marine Species (Flesh) ............... ........................................ ........................................... 79 H. Local Crops ................................................................................................................... 79 I. Soil .............................................................. .................................................................. 79 J. Kelp ............................................................................................................................... 79 APPENDIX F. LAND USE CENSUS ......................................................................................... 80 Introduction .................. ....................................... ................................................................ 81 Executive Summary ............. ................................................................. ...................... 81 Definition of Uses ....................................................................................................... 81 The Land Use Census Scope ..................................................................................... 82 Re s earch Methodology .................... ................................................................................... 82 Field Research .................................................................... ....................................... 83 Data and Methodology Summary ............ ................................................................... 83 Documentation Spreadsheet ......................................... ............................................. 83 2017 Land Use Census Observations and Changes ........................................................... 83 Chemical and Toxic Waste ................. ........................................................................ 84 Milk Animals ............................................................................................................... 84 Meat Animals .............................................................................................................. 84 Growing Season for fleshy and leafy vegetables ........................................................ 84 Desalination Plant in Carlsbad , California ............ ....................................................... 84 Summary of Changes ................................................................................................. 84 APPENDIX G. ERRATA TO PREVIOUS AREORs .................................................................... 96 APPENDIX H. CDPH CO-LOCATED TLDs ............................................... ..................... ........... 98 APPENDIX I. ISFSI TLD DATA. .................... ......................................................................... 100 APPENDIX J. OFFSITE GROUND WATER SAMPLING ........................................................ 107 Page I iv 2017 AREOR Figures Figure 1 -Examples of Exposure Pathways ....................................... ........... .................. 3 Figure 2 -SONGS 45 mile REMP Radius .................................................... ................... 4 Figure 3 -SONGS Location ............................................... ............................................. 5 Figure 4 -SONGS REMP One Mile Radius ................... ................. .............................. 21 Figure 5 -SONGS REMP Two Mile Radius .................. ....................................... ......... 22 Figure 6 -SONGS REMP Five Mile Radius .................................................................. 23 Figure 7 -SONGS REMP 30-mile Radius North .................. .................... ..................... 24 Figure 8 -SONGS REMP 45-mile Radius South ............... ............................... ............ 25 Figure 9 -SONGS REMP TLD data through 2017 .................. ..................................... 29 Figure 10 131 in Aquatic Kelp ...................................... ...................... ....................... 36 Figure 11 -Kelp Sampling Locations .................. ................... ................. ........... ............ 37 Figure 12 -Monthly Average Airborne Particulate Gross Beta Preoperational and Operational Data for Units 2 and 3, (1976 -1988) ..................................... 70 Figure 13 -SONGS ISFSI and Selected REMP TLD Locations ................................. 105 Figure 14 -ISFSI and REMP TLDs .................................. ................................... ........ 106 Figure 15 -Closest Drinking Water Wells ............. .......................... ............. ............... 108 Page Iv Acronyms AREOR CAB CDPH CEAL DOE EAB EPA ISFSI LLD LUC MDC MDD ND NEI NRC ODCM QA QC REMP SAB TLD Annual Radiological Environmental Operating Report Controlled Area Boundary California Department of Public Health Contracted Environmental Analysis Laboratory Department of Energy Exclusion Area Boundary U.S. Environmental Protection Agency Independent Spent Fuel Storage Installation Lower Limit of Detection Land Use Census Min i mum Detectable Concentration Minimum Differential Dose Not Detectable Nuclear Energy Institute U.S. Nuclear Regulatory Commission Offsite Dose Calculation Manual Quality Assurance Quality Control Radiological Environmental Monitoring Program Site Area Boundary Thermoluminescent Dosimeter 2017 AREOR Page I vi 2017 AREOR 1 Executive Summary On June 12, 2013 , Southern California Edison notified the Nuclear Regulatory Commission (NRC) that it had permanently ceased operation for both Units 2 and 3 on June 7, 2013. While all power operations have ceased, spent fuel remains stored on site. San Onofre Nuclear Generating Station (hereafter referred to as San Onofre or SONGS) continues to fulfill its regulatory commitment to monitor the environment and potential exposure pathways. The REMP verifies that San Onofre has had no radiological impact to the surrounding environment or people and that it is within applicable state and federal regulations. The Radiological Environmental Monitoring Program (REMP) includes the sampling of environmental media and measuring radiation levels in the environment surrounding SONGS. Its purpose is to identify any levels of radioactivity or radiation associated with SONGS that have a potential exposure to a member of the general public. This is accomplished through the measurement of direct radiation and by the sampling and analyses of various environmental media, including:

• soil
• shoreline sediment (beach sand)
• air (particulate

& iodine)

• local crops
• non-migratory marine species
• kelp
• drinking water
• ocean water
• ocean bottom sediments Samples are analyzed for both naturally occurring and SONGS plant-related radionuclides.

A detailed description of the 2017 sampling locations and location maps are included in Appendix A of this report. An independent assessment of environmental impact is performed by the California Department of Pub l ic Health (CDPH) through the collection and analysis of samples, placement of dosimeters and collection of air samples. In addition , the site participates in onsite and offsite inspec t ions. This report describes the REMP conducted at San Onofre and covers the period from January 1, 2017 through December 31 , 2017. The REMP produces scientifically defensible data demonstrating no observable radiological environmental impact from SONGS. This report fulfills applicable license commitments, as described in DPR-13, NPF-10, NPF-15 , and the Offsite Dose Calculation Manual (ODCM). The REMP data collected during 2017 , as in previous years , continues to be representative of background levels. The data is summarized in the Statistical Summary of REMP Data found in Appendix B. The radionuclides cesium-137 (Cs-137) in soil and iodine-131 (1-131) in kelp were detected above the minimum detectable concentration (MDC), with the Cs-137 being attributable to fallout from nuclear weapons testing and the Fukushima Daiichi accident in Japan and the 1-131 associated with medical administrations. These isotopes have been detected at indicator locations , as well as at control locations, in past years. Naturally occurring radionuclides, including beryllium-? (Be-7), potassium-40 (K-40), thorium-228 (Th-228) and thorium-230 (Th-230) were detected in both control and indicator locations at similar Page 11 2017 AREOR concentrations and are not related to the operation of SONGS. Refer to Appendix B for a more detailed discussion. There is a natural and manmade radiation background. Natural background is comprised of the terrest r ial and cosmic radiation sources while manmade background results from past weapons testing fallout and routine medical applications. Prior to the construction of SONGS, environmental samples and measurements were collected and analyzed to determine the baseline natural radiation levels. The results from the indicator stations are compared to this pre-operational data , as well as control samples , to evaluate if changes in any radiation levels can be attributed to SONGS or other causes such as natural variations in the environment or manmade contributions. In summary, the environmental monitoring data collected during 2017 supports a conclusion of no adverse effect on the population or the environment from SONGS. The radiation exposures to peo p le living in the surrounding area from SONGS remains less than 2 mrem per year , which is a small fraction of the radiation exposures in the environment from the natural background from terrestrial and cosmic radiation. 2 Radiological Environmental Monitoring Program 2.1 Program Overview A key p urpose of the REMP is to characterize the radiological environment outside of the power block, providing data for assessing potential radiological impact resulting from the decommissioning activities for SONGS Units 2 and 3. It is designed and conducted:

• to detect any significant increase in the concentration of radionuclides in the pathways of exposure to the public ,
• to detect any significant change in ambient gamma radiation levels, and
• to fulfill the radiological environmental monitoring requirements of the ODCM. Expos u re pathways are the different routes by which people can potentially be exposed to radiation or radioactive materials. The pathways may be characterized into four general types, shown below along with a brief description of the monitoring as performed at SONGS:
• AIRBORNE. The airborne pathway represents the inhalation intake of airborne radioactive materials. This pathway is sampled in areas around SONGS by continuously drawing air through specialized filters and charcoal cartridges 24 hours a day, 7 days a week. Although both units at SONGS have been shut down since January 2012 , these air samples continue to be collected on a weekly basis.
• WATERBORNE.

The waterborne pathways include the exposure to radioactive materials accumulated in aquatic biota (fish, shellfish) and in shoreline sediments. These pathways are assessed through the collection of fish and shellfish samples in the environment around the plant. Sediment samples are also collected to evaluate any long-term buildup in the environment.

• INGESTION. The ingestion pathway includes broadleaf vegetation, agricultural products, and food products.

Atmospheric releases from the plant can deposit on these food products , represent i ng an intake exposure pathway through the consumption of these food products. Samples of crops (e.g., tomato , lettuce , sorrel) are collected from the local area around the plant to evaluate any impact on this pathway. Page 12 2017 AREOR

• DIRECT RADIATION.

The direct radiation pathway represents the external exposure from sources on the plant site and directly from any radioactive effluents released to the air or water. This direct environmental radiation dose is measured through the use of direct measurement dosimeters, such as thermoluminescent dosimeters (TLDs) or optically stimulated luminescence dosimeters (OSLs) that are placed around the plant site and in the local environment. Figure 1 -Examples of Exposure Pathways 2.2 Site Area and Description San O n ofre Nuclear Generating Station is located next to San Onofre State Beach, adjoining Camp Pendleton Marine Corps Base, in San Diego County, 64 miles south of Los Angeles, California. At this time there are no operating reactors, but in the past, there were three operat i ng pressurized water reactors with a total rated capacity of 2664 net megawatts electrical. Page 13 2017 AREOR Figure 2 -SONGS 45 mile REMP Radius Unit 1, rated at 410 net megawatts electrical, was supplied by Westinghouse Electric Company. Unit 1 b egan commercial operation on January 1 , 1968. The unit was permanently shut down on No v ember 30 , 1992, and has been decommissioned. By August 31 , 2004 , all fuel was transferred to the Independent Spent Fuel Storage Installation (ISFSI). By November 29 , 2006 , all remaining monitored effluent pathways were permanently removed from service or routed to Unit 2 d ischarge to the outfall. Unit 1 is owned by Southern California Edison (80%) and San Diego G as and Electric (20% ). Unit 2 a nd Unit 3 were supplied by Combustion Engineering, Inc., with turbine generators supplied by G.E.C. Turbine Generators , Ltd., of England. The units began commercial operation on August 18, 1983, and April 1 , 1984, respectively , a n d were rated at 1127 net megawatts electrical each. The twin units are owned by Southern California Edison (78.21%), San Di e go Gas and Electric (20% ), and the City of Riverside ( 1. 79% ). Page 1 4 n t a M of'Nea M ot1ntailta

• , rional ecreation A rea M a li bu Se nta C a l * * ,.,_ P&cific O n Fig u re 3 -SONGS Location 2017 AREOR @ Effecti v e December 29, 2006 , the City of Anaheim transferred its ownership interests in San Onofre Units 2 and 3 and the entitlement to the Units 2 and 3 output to Southern California Edison Company , except that it retains its ownership interests in its spent nuclear fuel and Units 2 and 3's independent spent fuel storage installation located on the facility's site. In addition, the Cit y of Anaheim retains financial responsibility for its spent fuel and for a portion of the Units 2 and 3 decommissioning costs. The City of Anaheim remains a licensee for purposes of its retaine d interests and liabilities.

Southern California Edison notified the Nuclear Regulatory Commission (NRC) on June 12, 2013, that it had permanently ceased operation of Units 2 and 3 on J u ne 7 , 2013. The NRC notification , called a Certification of Permanent Cessation of Power Operations , sets the stage for SCE to begin preparations for decommissioning. Page 15 l 2017 AREOR 2.3 Sample Collection and Analyses Sampl e s of environmental media were obtained to meet the stated objectives. The selection of sampl e types was based on established important pathways for the transfer of radionuclides through the environment to exposures to individuals. Refer to Appendix A for a complete list of REMP sample locations as described in Table 5-4 of the ODCM. Sampling locations have been selected , considering t he local environmental characteristics , i ncluding meteorology , land use and water use data. Two types of sampling locations are define d. The first type , representing control stations , is located in areas that are beyond the measu r able influence of San Onofre, typically at distance of greater than 5 miles away. The sampl e results from these stations are considered representative of background levels with no potenti a l for contribution from releases and sources at SONGS. The control stations also serve as indicators of rad i oactive sources other than SONGS , such as nuclear medicine applications. The se c ond type, representing indicator stations , is used to measure any radiation contributed to the e nv i ronment caused by San Onofre. Indicator stations are located close to San Onofre (within 5 miles), reflecting the nearby areas to prov i de environmental measurements for releas e s from the plant. Ind i cator stations can be located either onsite or offs i te. As des c ribed in Section 4 , below, the SONGS REMP is conducted in accordance with a Quality Assura n ce Program , meeting the requirements of NRC Regulatory Guide 4.15 , Rev. 1. Sampl e s are collected using approved methods; radiochemical analyses of these samples are performed using standardized analytical methods. The Contracted Environmental Analysis Labora t ory (CEAL) participates in an i nter-laboratory comparison program in partial fulfillment of the qu a lity assurance requirements for environmental monitoring. The CEAL participated i n cross check programs which meet the intent of Reg. Guide 4.15. See Appendix C for additional details. Page 16 2017 AREOR 2.3.1 Detection Limit Terminology The United States Nuclear Regulatory Commission (NRC) requires that equipment and analytical methods used for radiological monitoring must be able to detect specified min i mum limits for the type sample and the radionuclide of the analysis. The a priori detection capability for the analytical system used for the measurement is referred to as the Lower Limit of Detect i on (LLD). This LLD ensures that radiation measurements are sufficien t ly sensitive to detect any levels of concern and small changes in the environment. Samples with no detectable radiation levels are typically referred to as less than the m i nimum detectable concentration (MDC). The MDC is evaluated for each sample and is used to ensure that the specifi c analysis has sufficient sensitivity to detect levels consistent w i th the requirements for analys i s by the system LLD. For a more thorough discussion , refer to NUREG/CR-4007.

• Lower Limit of Detection (LLD) -The LLD is the a priori (before the fact) lower limit of detection for the method used for the analysis.

It is a measure of the detection capability for the analytical method and not for any s i ngle sample analysis. This value is calculated for each isotope and every ma t rix based on typical or expected values of decay time , sample size , counter efficiency , etc. The LLD values are listed in the ODCM and represent the detection capability that the analytical methods must meet for the specified sample med i a.

• Minimum Detectable Concentration (MDC) -The MDC is the a posteriori (after the fact) lower limit of detect i on based on actual decay time , measured sample size , and counting efficiency for an individual sample analysis.

The MDC is compared to the LLD to verify that the measurement met the ODCM requirements for the maximum value of the LLD for the listed analytes. Values above the MDC are presumed to represent " detected" levels of radioactivity.

• No Detectable (ND) -" No Detectable" is used for d i rect radiat i on dosimeters , such as TLDs and OSLs data , to designate when t he exposure measured is below the expected background exposure , plus a calculated uncertainty. The TLD will have measured radiation exposure, but the magnitude of the exposure is within the expected range , accounting for natural background and seasonal fluctuations. ND indicates that there was no exposure above the background variation that is attributable to SONGS. The sampling and analyses for the REMP are conducted in a manner to ensure the detection capabi li ties meet the specified requirements. Page 17 2017 AREOR 2.4 Regulations and Guidance
• 10 CFR 50, Appendix I 10 CFR 50 , Appendix I establishes limits on releases of radioactivity to the env i ronment and the resu l ting dose to the public. The limits are: Source NRC Limits for SONGS Liquid Effluent Less than or equal to 3 mrem/yr to whole body from all pathways of exposure Less than or equal to 10 mrem/yr to any organ from all pathways of exposure Gaseous Effluents

-Noble Less than or equal to 10 mrad/yr gamma air dose Gases Less than 20 mrad/yr , beta air dose Less than 5 mrem/yr , total body dose to an o ff s i te exposed i ndividual of the public lodine-131, tritium and Less than or equal to 15 mrem to any organ for an offsite particulates with half-life individual from all pathways of exposure greater than 8 days

• 40 CFR 190 The Environmental Protection Agency (EPA) has established environmental radiation protection standards in 40 CFR 190 for the uranium fuel cycle that includes nuclear power plants. These l i mits are applicable to the sum of liquid effluent , gaseous effluents and direct radiation.

The dose li mits from all applicable pathways to any offsite individual are o 25 mrem/year to the whole body o 75 mrem/year to the thyro i d o 25 mrem to any other organ As dis c ussed in the 2017 SONGS Annual Radioactive Effluent Release Report , the calculated dose to a member of the public as a result of SONGS is a small fract i on of the dose standard established by the EPA. This conclusion is supported by the results of the REMP , as reflected by the a bsence of measurable levels of radiation or radioactive materials in the offsite enviro n ment attributable to SONGS. Page 18 2017 AREOR The EPA established the following concentration limits for drinking water in 40 CFR 141: Source NRC Limits for SONGS Gross Alpha 15 pCi/L Gross Beta 50 pCi/L Ra-226 and Ra-228 5 pCi/L combined Sr-90 8 pCi/L Uranium 30 µG/L Tritium 30 , 000 pCi/L (limit for saltwater site; no downstream drink i ng water supplier) These limits were selected to ensure that no member of the publ i c receives more than 4 mrem total body or organ dose , based on 2 liters per day drinking water intake. The sampling of ocean water and groundwater in and around the plant confirms that SONGS has no impact on public water supplies for the surround i ng communities. The following regulatory and industry guidance has been identified as applicable to the SONGS REMP with application as may be required.

• US NRC Regulatory Guide 4.1 , Programs for Monitoring Radioactivity in the Environs of Nuclear Power Plants , 1975
• US NRC Regulatory Gu i de 4.2 , Preparatio n of Environmental Reports for Nuclea r Power Stations, 1976
• NUREG-0133 , Preparation of Radiological Effluent Technical Specificat i ons for Nuclear Power Plants
• US NRC Regulatory Guide 1.109 , Calculation of Annual Doses to Man from Releases of Reactor Effluents for the Purpose of Evaluating Compliance with 1 OCFR Part 50 , Appendix I , 1977
• NUREG-1301 , Offsite Dose Calculations Manual Guidance:

Standard Radiological Effluent Controls for Pressurized Water Reactors , Generic Letter 89-01 , Supplement No. 1 , 1991

• ANSI N545, American National Standard Institute, " American National Standard Performance , Testing , And Procedural Specifications for Thermoluminescence Dosimetry (Environmental Application), 1975
• ANSI/HPS N13.37 , " Environmental Dosimetry

-Criteria for System Des i gn and Implementation ", 2014

• US NRC Regulatory Guide 4.15 , Rev. 1, Quality Assurance for Radiological Monitoring Programs (Normal Operations)

-Effluent Streams and the Environment , 1979

• NUREG-1576 , Multi-agency Radiological Laboratory Analytical Protocols
• NUREG/CR-4007 , Lower Limit of Detection: Defin i tion and Elaboration of a Proposed Position for Radiological Effluent and Environmental Measurements , 1984 Page 19 2017 AREOR 2.5 NRC Reporting Levels The NRC has established required reporting levels that represent thresholds above which an investigation is needed to evaluate and ensure compliance with radiation safety standards for the public. Licensed nuclear facilities must prepare a special report and increase their sampling if any measured level of radiation or radioactive material in an environmental sample is equal to or greater than the corresponding reporting level. 2.6 Summary of Analysis of Results and Trends The 2017 SONGS REMP was conducted in accordance with 10 CFR 50, Appendix I, 10 CFR §50.36a, and Section 5.0 of the SONGS Offsite Dose Calculation Manual (ODCM). The REMP sample data have been summarized in the format specified in NUREG-1301. Data have been evaluated to identify the levels of any plant-related environmental radioactivity above background levels (i.e., plant-related contributions that are distinguishable from background). For data distinguishable from background , a comparison has been made between current environmental monitoring results and preoperational or previous operational data as appropriate , for trending environmental radioactivity resulting from plant operation. To conform with 10 CFR Part 50, Appendix I, Section IV B.2 , data on measurable levels of radiation and radioactive materials in the environment are provided to allow for a comparison to the predicted (calculated) values in the environment from radioactive material released in effluents.

The tabulated means, ranges , and standard deviations are presented in Appendix B. Compa r isons with background and pre-operational baseline data are presented in Appendix D. Page I 10 2017 AREOR The REMP data are reviewed for accuracy, compared against NRC reporting levels , and entered into the REMP database. Measurements exceeding the administrative levels (10% of the NRC reporting levels) are flagged. Analyses are performed using i nstrumentation and methods that provide analytical results with a level of detection as required by the ODCM. The a posteriori Minimum Detectable Concentration (MDC) is compared to the maximum value for the a priori Lower Limit of Detection (LLD) specified in the ODCM. This ensures that regulatory limits for the maximum LLD are met. Table 1 -Ma xi mum LLDs a s Specified in SONGS ODCM Airborne Particulate Water or Gases Analysis (pCi/L) 3 (pCi/m ') I Gross beta 4 I 1E-02 H-3 2000 I Mn-54 15 Fe-59 30 I Co-58 , 60 15 Z n-65 30 I Zr-95 , Nb-95 15 1-131 1 7E-02 I Cs-134 15 5E-02 Cs-137 18 6E-02 I Ba-140 , La-140 15 Marine Animals (pCi/kg, wet) 130 260 130 260 130 150 Local Crops (pCi/kg, wet) 60 60 80 Sediment (pCi/kg, drv) 150 180 j l ] J ] The impact of SONGS on the surrounding environment is assessed through a series of analyses. These analyses include: data reduction , comparisons of indicator to control locations (Appendix B); comparison of operational to preoperational environmental data (Appendix D); summary of deviations from sampling requirements and corrective actions taken (Appendix E); and the results of the 2017 Land Use Census (Appendix F). The results of the 2017 monitoring program show no levels of direct rad i ation or radioactive materials from SONGS distinguishable from background in the offsite environment. Environmental samples from areas surrounding SONGS continue to indicate no radiological impacts from the plant. A detailed discussion of the 2017 analytical results is presented in Appendix B to Part II of this report. Analytical values from offsite indicator sample stations continue to trend with the control stations. With the exception of measured medical radioisotope iodine-131 in kelp , unrelated to SONGS , no measurements were distinguishable from background levels. The data indicate that SONGS continues to have no measurable radiological impact on the environment or any member of the public during 2017. In addition, dose to members of the public attributable to SONGS related radiological activities remain well below regulatory limit of 100 mrem per year, as specified in 10 CFR 20 , § 20.1301 and in keeping with the philosophy of " as low as is reasonably achievable" (ALARA), as specified in 10 CFR 20.1101 (b ). The REMP data collected during 2017 , as in previous years , continues to be in line with background levels. The data are summarized in the Statistical Summary of REMP Data found in Appendix B. Cesium-137 (Cs-137) is routinely i dentified in some soil samples and lodine-131 (1-131) i s found in some kelp samples. Cs-137 and 1-131 are radionuclides that could be associated with releases from nuclear power plants , including SONGS. However, the level of Cs-137 found in soil is consistent with historical and expected Cs-137 concentrations from Page I 11 2017 AREOR nuclear weapons testing. Since SONGS is no longer operating , there is not a realistic generation source for 1-131; therefore it is considered to be associated with use as medical administrations. It is no longer being generated as a fission product from the SONGS operation. And with its 8-day radioactive half-life, it is unrelated to any decommissioning activities at SONGS. Naturally occurring radionuclides , including beryllium-? (Be-7), potassium-40 (K-40), thorium-228 (Th-228) and thorium-230 (Th-230) were detected in both control and indicator locations at similar concentrations and are not related to the operation of SONGS. Refer to Appendix B for a more detailed discussion. 3 Land Use Census In accordance with 1 OCFR Part 50, Appendix I , Section IV.B.3, each year a Land Use Census is performed to identify any changes in the use of areas at and beyond the site boundary. Modifications to the monitoring program are made if required by the results of this census to reflect new or changes in locations for pathways of exposure around the plant. Appendix F of the report identifies changes to the census in 2017; no changes in the sampling media or sample locations were required. However , the SONGS indicator garden was relocated to a location near Air Sampler #11. 4 Quality Assurance To assure quality of sample analyses , a portion of REMP i s devoted to quality assurance. All REMP activities , including support contractors , are assessed as defined in Regulatory Guide 4.15 , Rev. 1. The quality assurance program's main aspects include process quality control, instrument quality control , comprehensive data reviews , cross-check analyses , and audits. Routine REMP assessments ensure that the program , procedures and personnel are performing satisfactorily. Samples are collected using approved methods; radiochemical analyses of these samples are performed using standardized analytical methods. Quality audits and independent technical reviews help determine areas that need attention. Thes~ areas are addressed in accordance with the station's Corrective Action Program. Duplicate sampling of the environment is performed by SONGS to demonstrate repeatability of the sample collection , preparation , and analysis process. Split sample analysis is performed for the evaluation of the precision and bias trends of the method of analysis without the added variables introduced by sampling. SONGS participates in a sample splitting program with the California Department of Public Health Radiological Health Branch (CDPH-RHB) in accordance w i th the site's REMP procedures. GEL Laboratories , LLC (GEL) performs the radiochemistry analysis of samples noted within this report. GEL performs the requested analysis under its Quality Assurance Program , which meets the requirements of Title 10 Code of Federal Regulations Appendix B Part 50 , ASME NQA-1 and Regulatory Guide 4.15 Revision 1. The measurement capabilities of the radiological laboratory are demonstrated by participating in an inter-laboratory measurement assurance program and performing duplicate and split sample analyses. Approximately 10% of the analyses performed are quality control samples , consisting of inter-laboratory measurement assurance program samples , duplicate samples, and split samples. The inter-laboratory measurement assurance program provides samples that are similar in matrix and size to those sampled and measured by the REMP. This program assures that equipment calibrations and sample preparation methods accurately measure radioactive material i n samples. See Appendix C for detailed QA measurement data. Page 112 2017 AREOR Stanford Dosimetry performs the environmental TLD analyses noted i n this report. Stanford Dosimetry performs the requested analyses under its quality assurance program which meets the requirement of Title 10 Code of Federal Regulations Part 50 , Appendix B , ASME NQA-1 and Regulatory Guide 4.15 Revis i on 1. 5 Program Deviations Any deviation in the conduct of the program as required, either in terms of sample collection or analysis , requires an investigation as to the cause and identification of measures to prevent recurrence. Deviations from the sampling program or sensitivity requirements are acknowledged and explained in Appendix E to this report. 6 Conclusion Radiological environmental data collected throughout 2017 have been evaluated to determine any impact that San Onofre operations has on the surrounding environment. To accomplish this, several methods of evaluation were employed , namely: 1. Compilation and verification of all data, as well as a determination of those data considered to be significantly greater than background levels. 2. Correlation of effluent concentrations to concentrat i ons in the environment. Refer to Appendix B. 3. Examination of time dependent variations of pertinent radioisotopes in selected environmental media throughout the year at both ind i cator and control locations. 4. Comparison of radioactivity in various media in 2017 against the levels observed in p reoperational years. 5. Historical trending of radionuclides in various media during operational years. This evaluation did not identify any radionuclides attributable to the operation of SONGS above background in any sample measurement or med i a. It is concluded that the operation of SONGS throug h 2017 had no observable radiological environmental impact. 7 References

1. SONGS Offsite Dose Calculation Manual (ODCM) Revision 11 , Section 5.0 , 2017. 2. SONGS Radiological Monitoring (RM) Procedures

a. SDS-CH2-PGM

-1006 , Radiological Environmental Monitor i ng Program b. SDS-CH2-PCD-1023 , Review , Analysis and Reporting of Radiological Environmental Monitoring Program (REMP) Data 3. N UREG/CR-4007 , " Lower Limit of Detection: Definition and Elaboration of a Proposed P osition for Radiological Effluent and Environmental Measurements ", August 1984. Page 113 2017 AREOR APPENDIX A. SAMPLE TYPE AND SAMPLING LOCATIONS Page 114 APPENDIX A 2017 AREOR Table 2 -Direct Radiation Measuring Locations 1 City of San Clemente (Former SDG&E Offices) (Control) 5.7 NW 2 Camp San Mateo -(MCB, Camp Pendleton) 3.6 N 3 Camp San Onofre -(MCB , Camp Pendleton) 2.8 NE 4 Camp Homo -(MCB , Camp Pendleton) 4.4 E 6 Old El Camino Real (AKA Old Highway 101) 3.0 ESE 8 Noncommissioned Officers' Beach Club 1.4 NW 10 Bluff 0.7 WNW 11 Former Visitors' Center 0.4 b NW 12 South Edge of Switchyard 0.2 b E 13 Southeast Site Boundary (Bluff) 0.4 b ESE 15 Southwest Site Boundary (Office Building) 0.1 b SSE 16 East Southeast Site Boundary 0.4 b ESE 19 San Clemente Highlands 4.9 NNW 22 Former US Coast Guard Station -San Mateo Point 2.7 WNW 23 SDG&E Service Center Yard (Control) 8.1 NW 31 Aurora Park -Mission Viejo (Control) 18.6 NNW 33 Camp Talega -(MCB , Camp Pendleton) (Contro l) 5.9 N 34 San Onofre School -(MCB , Camp Pendleton) 1.9 NW 35 Range 312 -(MCB , Camp Pendleton) 4.8 NNE 36 Range 208C -(MCB , Camp Pendleton) 4.1 NE 38 San Onofre State Beach Park 3.4 SE 40 SCE Training Center -Mesa 0.7 NNW 41 Old Route 101 -East 0.3 b E 44 Fallbrook Fire Station (Control) 17.7 E 46 San Onofre State Beach Park 1.0 SE 47 Camp Las Flores -(MCB, Camp Pendleton) (Control) 8.6 SE 49 Camp Chappo -MCB (Control) 12.9 ESE 50 Oceanside Fire Station (Control) 15.6 SE 53 San Diego County Operations Center (Control) 44.2 SE 54 Escondido Fire Station (Control) 31.8 ESE 55 San Onofre State Beach (U1 West) 0.2 b WNW Page I 15 APPENDIX A 2017 AREOR lt%j':l'X~t", *~rz,, * '.f1:"b "'"'~ff;111WC~i'1~~~\~~iiiffl'.l'-~~;,tl,'<0?~?'[j~t~¥£':,Yl'U!~ .> ... ' l ' '. ,;' ,.*. ' ~* ' \, :',," :';, ~~.'.'. ... ~:. ;: \;;~ Jl;:*:,),,,Jifi~:,'.,,"*'-ft'ii,1/,;;:;,*i; ",.~ '.,i/,0:;/::;,l'.f,f .,,~<;;1 11 i~ii:~ , / 1, 1~t\l~,~1J~,~~;~~~it~lti~Lffl;!~<<1rJB-~!iilm~~}~~l~~1r:~~,,~~IJQi 56 San Onofre State Beach (U1 West) 0.2 b w 57 San Onofre State Beach (Unit 2) 0. 1 b SW 58 San Onofre State Beach (Unit 3) 0.1 b s 59 SONGS Meteorological Tower 0.3 b WNW 61 Mesa -East Boundary 0.7 N 62 MCB -Camp Pendleton 0.7 NNE 63 MCB -Camp Pendleton 0.6 NE 64 MCB -Camp Pend l eton 0.6 ENE 65 MCB -Camp Pendleton 0.7 E 66 San Onofre State Beach 0.6 ESE 67 Former SONGS Evaporation Pond 0.6 NW 68 Range 21 OC -(MCB , Camp Pendleton) 4.4 ENE 73 South Yard Fac ili ty 0.4 b ESE 74 Oceanside City Hall (Backup Control) 15.6 SE 75 Gate 25 MCB 4.6 SE 76 El Camino Real Mobil Station 4.6 NW 77 Area 62 Heavy Lift Pad 4.2 N 78 Homo Canyon (AKA Sheep Valley) 4.4 ESE Table 3 -A ir borne Radioactivity Sampling Locations 1 C i ty of San Clemente (City Hall) 5.1 NW 7 AWS Roof 0.18 b NW 9 S t ate Beach Park 0.6 ESE 10 B l uff 0.7 WNW 11 Mesa EOF 0.7 NNW 12 Former SONGS Evaporation Pond 0.6 NW 13 Marine Corp Base (Camp Pendleton East) 0.7 E 16 San Luis Rey Substation (Control) 16.7 SE Page I 16 APPENDIX A 2017 AREOR Table 4 -Soil Sampling Locations 1~**, *~ : . f; .17,~ Fl<"~.<<~"~"'"'!"":"}' ',,,...~,7'*,:,,~,rnit;Jf\~ffi'.*:!""t,*?if;!IU'P:r,~~~::"B"'*"' '"-;;*~~l'~~ffft'ff>177s"f;'l>~

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' 'ZIJ 11'\,/:;;J-J:4.'i ~.;tJ,;1';;,;~), 1$'.t~t,i<U~-t~~;t,! *""" A San Onofre Kelp Bed 1.5 s B San Mateo Kelp Bed 3.8 WNW C Barn Kelp Bed 6.3 SSE E Salt Creek (Control) 11 to 13 WNW to NW Table 11 -Backup Kelp Sampling Locations G Capistrano Beach Reef (not listed in the ODCM) 8.9 to 9.1 NW H San Clemente Pier (not listed in the ODCM) 5.7 to 5.8 NW Wheeler North Artificial Reef (not listed in the ODCM) 5.3 WNW Page I 18 APPENDIX A 2017 AREOR Table 12 -Ocean Bottom Sediment Sampling Locations ,J*;' I *~ '~1'?~,{>.,t<~~\-_fc" ' . .. r "" .. ,~~'ff', 1~=1!;"'"'Jrf;t"j~7}1T"i1:;-'5.~~~-,;i .~f1'-''-. '"'" '""', *:~*.pi:f;~~~*&,y:_,,,*~~,1' j;A ,; ,* , ,'. ,,, ' , ,,;',,,': ,' . ;;, . * .. :~ '": ,~' .< . ' '.' . , :;:,:'J*!:,;:,:t;~~ . . , I i-:.J" ,.,~~~ .. ~" ::.." ,;'};J;L,t.~J.:..:::~,i: .. -.* s;'..:C: ,; .,.~J .:.,.:'~JLJ~.:t,",;£~~\i1.t:1!{ifilhl~J:i_4jl~£,:~~1.i~f~}*l. t.:O *J,.,.1-,/i"L~L..:',#i~*J. 1~, hl:1fl.w;;){U,~~1l~£t:.::, B C D E F 51 52 Un i t 1 Outfall 0.8 SSW Unit 2 Outfall 1.6 SW Unit 3 Outfall 1.2 SSW Laguna Beach (Control) 20-25 NW SONGS Up-coast 0.9 WSW Unit 2 Conduit (not listed in the ODCM) 0.1 SW Unit 3 Conduit (not listed in the ODCM) 0.1 SSW N OTES a Distan ce (miles) and Direction (sec tor) are measured relative to Units 2/3 midpoint as described in the ODCM Rev. 8. Direction determined from degrees true north. b Distances are within the Un its 2/3 SAB/EAB (Site Area Boundary/Exclusion Area Boundary) c Soil samples are not required by Technical Specifications. d Kelp samples are not required by Technical Specifications. e Backup kelp sampling locations are only used if needed, In 2017 , no samples were obtained from backup kelp sampling locations. MCB Marine Corps Base (Camp Pendleton) Page I 19 APPENDIX A 2017 AREOR Tab l e 1 3 -Sector and D i rection Designations Sector Center Sector 22.5° Direction Limit Line Limit Sector 348.75 0 & 360 11.25 A N 11.25 22.5 33.75 B NNE 33.75 45.0 56.25 C NE 56.25 67.5 78.75 D ENE 78.75 90.0 101.25 E E 101.25 112.0 123.75 F ESE 123.75 135.0 146.25 G SE 146.25 157.0 168.75 H SSE 168.75 180.0 191.25 J s 191.25 202.5 213.75 K SSW 213.75 225.0 236.25 L SW 236.25 247.5 258.75 M WSW 258.75 270.0 281.25 N w 281.25 292.5 303.75 p WNW 303.75 315.0 326.25 Q NW 326.25 337.5 348.75 R NNW Page I 20 APPENDIX A

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.,. '"'* o,a ,_, .. .,'=!,"::~:ft..:::a.daf\ Figure 7 -SONGS REMP 30-mile Radius North SectorP WNW Sector N w 2017 AREOR Page 124 APPENDIX A San 1 Onofre RE P 45-Mlle South ') Ocean oc.e,,.....,., + 'aMt""'-a....,..,,. -n.o --fr--, -* Figure 8 -SONGS REMP 45-mile Radius South 2017 AREOR Page 125 APPENDIX B. RESULTS AND DISCUSSIONS OF 2017 ENVIRONMENTAL DATA 2017 AREOR Page I 26 APPENDIX B 2017 AREOR To ass e ss the changes or trends in the radioactivity level in the environment over the past year, the data from January 1, 2017 through December 31, 2017 were evaluated. A summary of the type a n d number of REMP samples obtained in 2017 appears in Table 14. The analysis results , as presented below , support the conclusion that all measured levels of radioactivity are attributable to sources external to SONGS (fallout from the nuclear accident at the Fukus hi ma Daiichi Nuclear Power Station, or Chernobyl, residual fallout from legacy atmospheric nuclear weapons testing, and discharge of medically administered 1-131 from the San Juan Sewage Plant outfall). Cs-137 has been intermittently detected in the indicator and in the control soil samples in past years and no correlation between Cs-137 level in soil and proximity to the plant h a s been observed. Cs-137 levels in marine animal flesh found in indicator samples closely mirror those found in control samples. We conclude that SONGS had no statistically significant radiological environmental impact during 2017. Table 14 -REMP Sample Analysis Summary for 2017 Direct Radiation Air b orne Particulates Ocean Water Drinki ng Water , Unfiltered Sh o rel ine Sediment Ocea n Bottom Sed imen t Mari n e Species, Flesh Local Crops Kelp Soil NOTES Dos imetry Gross Beta 1-131 Gamma Gamma H-3 H-3 Gamma , H-3 Gross Beta Gamma Gamma Gamma Gamma Gamma Gamma Quarterly 49 195 c Weekly 8 415 8 415 Quarterly 8 32 Monthly 4 48 4 48 Quarterly 4 16 2 24 Monthly 2 24 2 24 Semi-Ann ually 4 8 Semi-Annually 7 14 Semi-Annually 3 24 Semi-Annually 2 1 ob Semi-Annually 4 8 Annually 5 5 a. The total number of analyses includes environmental samples not required by the ODCM , such as ocean water and ocean bottom samples from locations not listed in the ODCM. b. An extra sample of yellow squash was taken in the fall of 2017 at each location. c. Environmental dosimeters used for ISFSI monitoring not included in this total. Page 127 APPENDIX B 2017 AREOR A. Results and Discussions of 2017 Environmental Data 1. Direct Radiation Direct gamma radiation is monitored in the environment by calcium sulfate (CaS0 4) Thermoluminescent Dosimeters (TLDs) placed at 49 locations and analyzed quarterly per ANSI/HPS N13.37-2014 standards. The natural direct gamma radiation varies according to location because of differences in the natural radioactive materials in the soil, soil moisture conten t , and other factors. Figure 9 compares the direct gamma radiation measurements for indicator and control locations with those from the site EAB. The values plotted are the averages for all of the stations according to type. The trends of Figure 9 clearly show that any contribution from SONGS to the off-site environment direct dose component is negligible, being indistinguishable from the background variation. Beginning in October 2016, SONGS implemented new ANSI/HPS N13-37-2014 for environmental dosimetry system design and implementation. In accordance with this standard , the raw TLD resu lts are adjusted by the exposure to air kerma (8. 76 mGy/R) and air kerma to ambient dose (1.2 rem/Gy) conversion factors described in ANSI/HPS N13.37-2014, Section 3.2.1. This change results in a slight increase in the value of the dose , by a factor of 1.05 mrem/mR. Previous results in the AREOR were expressed in mR, but in keeping with ANSI N13.37 , 2017 results are expressed in mrem. TLDs located greater than five miles from SONGS are generally considered control TLDs. The ind icator locations are selected as inner and outer rings as required by the ODCM. Additional TLDs are placed at locations of interest such as schools and hospitals. All 2017 control location TLD re a dings were below the minimum detectable dose and all 2017 indicator location readings outside the Exclusion Area Boundary (EAB) were below the minimum detectable dose. The Annual Public Dose, as referenced in Table 15, is based on the potential member of the public exposure at the listed location. For offsite locations , the occupancy factor is 1 , for potential time occupancy. For onsite locations, at or near the EAB/CAB, the occupancy factor is determined per SDS-RP1-PCD-1007, Direct Radiation Exposure Controls and Monitoring. The da t a indicate detectable direct radiation measurements only in the immediate vicinity of SONGS, via those dosimeters placed either within or immediately adjacent to the EAB. The hypothetical maximum associated exposure to a member of the general public , adjusted for occupancy per SDS-RP1-PCD-1007, is less than 1 mrem per year as measured by this sample media. Refer to Table 15 for a summary of all 2017 SONGS REMP TLD data. Page I 28 APPENDIX B 25 20 ._ 15 ., t:: .. :, tT -ci t; E 10 5 0 l'\A .,. ' J \1 ' ... k A. J " v v 2017 AREOR Av e r a g e Qu a rt e rl y T L D E xp os ur e (m re m/s td. qtr) /1. i\ r I\ A A I I\ U' , v v \I I r\ ,, v, \. \ \ r ""' ' l \ , .-, ~I 'A A ,./ 1(A {\_ p -...::: ,.,,... ' r ' ' r . l'V 'f -.. con rol -In [:licat< 1r --EAE! 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2 0 18 F i gure 9 -SONGS REMP TLD data through 2017 Figure 9 compares environmental radiation levels of indicator and control locations for 2017 and previous years. These figures show the close correlation between the control and indicator locatio n TLD exposure data. Beginning in 2016 , the results have been increased by the conver s ion factors as described above. This increase , of roughly 1 mrem/quarter , can be seen in Figure 9 above. Ten laboratory control TLDs were analyzed quarterly. TLD numbers 1 , 23, 31 , 33 , 44 , 47 , 49, 50 , 53 , 54 and 7 4 are control TLDs. Separate TLDs are used to compensate for transit dose and a fade TLD is used to evaluate for the time and temperature dependent "fade" that may affect dosim e ter data. After the samples were analyzed , the measured doses were corrected for pre and post fi e ld exposure times. Neutron dosimeters were placed at REMP TLD station 55 and at selected locations around the Independent Spent Fuel Storage Installation (ISFSI). In 2017 no neutron radiation was detected at station 55. Some neutron radiation (up to 2.4 mrem/quarter) was detected at some of the ISFSI locations. a. Direct Radiation baseline evaluation and estimation of natural background An in-depth analysis of the environmental radiation results for the per i od of 2001 through 2010 was completed for all the monitoring locations. It can be inferred that if the standard deviation was low and no additional exposure above background was identified at a particular station , the average of that st a tion's radiation exposure results should be equal to natural background (baseline) at that location. The baseline results for REMP TLDs have been summarized with the annual and quarterly values in the 2017 TLD Data Table. Natural background radiation is variable and a minor shift in location can yield a measurable change in background radiation. Therefore if a TLD is moved the baseline (background) for that location may be affected. Page 129 APPENDIX B 20 1 7 AREOR The baseline environmental exposure analysis of 2001 through 2010 environmental TLD results i ncluded an assessment of the standard deviation of the quarterly results and annual totals at each control location. Th i s is an appropriate methodology to determine the ability to detect radiation exposure above background , described i n ANSI/HPS N13.37-2014 , " Environmental Dos i metryCriteria for System Des i gn and Implementation ." The quarterly and annual results expressed in Table 15 are positive exposure if they exceed either 5 mrem quarterly or 10 mrem annua ll y. If no t, the measurement i s noted as " ND" for " Not Detectable. An empir i cal determ i nation of the background baseline for stations w i th i n the Exclusion Area Boundary (EAB) is not possible due to the known plant related radiolog i cal activities (e.g., storage and transport of radioactive materials) that occurred during the baseline calculation study period. The average of the non-EAB stations close to the beach was approximately 15.8 mrem per quarter. A value of 15.8 mrem per quarter was conservatively selected as the baseline for the REMP stations located within the EAB. In 1980 the Department of Energy (DOE) conduc t ed an Ae ri al Radiological Survey of SONGS and the sur r ounding area. The baseline/background value of 15.8 mrem per standard quarter within the SONGS EAB is consistent w i th the 1980 gamma exposure rates reported by the DOE for the areas immediately north and south of SONGS , tak i ng into account the reduction in environmental radioactivity and background dose rates caused by the decay of atmospheric nuclear weapons testing fallout since 1980. Page I 30 APPENDIX B 2017 AREOR Table 15 -SONGS REMP TLD Data City of San Clemente 5.7 18.4 17.9 18.1 17.3 18.6 ND ND ND ND 73.5 71.8 ND ND 2 Camp San Mateo -MCB 3.6 19.6 18.8 18.9 18.3 19.6 ND ND ND ND 78.2 75.7 ND ND 3 Camp San Onofre -MCB 2.8 17.2 16.9 17.7 16.7 18.3 ND ND ND ND 68.9 69.6 ND ND 4 Camp Homo -MCB 4.4 19.0 17.9 19.1 18.7 18.4 ND ND ND ND 76.0 74.0 ND ND 6 Old Route 101 (ESE) 3 12.0 9.7 12.8 10.8 12.1 ND ND ND ND 47.9 45.3 ND ND 8 Noncomm issioned Officers' 1.4 16.2 16.3 16.5 16.7 16.5 ND ND ND ND 65.0 66.0 ND ND Beach Club 10 Bluff 0.7 17.2 16.0 17.0 15.8 17.7 ND ND ND ND 69.1 66.6 ND ND 19 San Clemente Highlands 4.9 18.7 18.3 19.7 18.7 19.3 ND ND ND ND 75.0 76.0 ND ND 22 Former US Coast Gua rd 2.7 18.8 17.9 19.2 17.8 19.4 ND ND ND ND 75.4 74.3 ND ND Station 23 I SDG&E Service Center Yard (Control) I 8.1 I 16.6 I 15.5 I 15.9 I 15.3 I 17.0 I ND I ND I ND I ND I 66.3 I 63.7 I ND I ND 31 I Aurora Park -Mission Viejo (Control) I 18.6 I 19.4 I 19.3 I 19.6 I 19.4 I 19.6 I ND I ND I ND I ND I 77.9 I 77.9 I ND I ND 33 Camp Talega -MCB 5.9 19.9 18.3 18.7 19.4 20.7 ND ND ND ND 79.3 77.1 ND ND (Contro l) 34 San Onofre School -MCB 1.9 17.0 16.3 17.3 16.0 16.7 ND ND ND ND 68.0 66.2 ND ND 35 Range 312 -MCB 4.8 17.8 16.1 15.5 15.5 16.4 ND ND ND ND 71.0 63.5 ND ND 36 Range 208C -MCB 4.1 20.5 19.4 21.1 19.2 20.8 ND ND ND ND 81.8 80.5 ND ND 38 San Ono fre State Beach Park 3.4 15.0 13.4 15.3 13.7 14.1 ND ND ND ND 60.1 56.5 ND ND 40 SCE Training Center -Mesa 0.7 18.0 17.4 17.8 17.0 18.5 ND ND ND ND 71.9 70.7 ND ND 44 Fallbrook F ire Station 17.7 14.7 15.9 15.0 14.5 15.6 ND ND ND ND 58.9 61.0 ND ND (Control) 46 San Onofre State Beach Park 1 12.8 11.8° 12.4 12.7 13.5 ND ND ND ND 51.2 50.4 ND ND 47 Camp Las Flores -MCB 8.6 14.0 16.2 15.8 15.4 16.2 ND ND ND ND 55.8 63.5 ND ND (Control) 49 I Camp Chappo -MCB (Control) I 12.9 I 14.9 I 15.8 I 15.6 I 15.3 I 16.3 I ND I ND I ND I ND I 59.8 I 63.0 I ND I ND 50 I Oceanside F ire Stat ion (Control) I 15.6 I 17.4 I 18.2 I 17.7 I 16.6 I 17.6 I ND I ND I ND I ND I 69.7 I 70.0 I ND I ND 53 San Diego County 1 Oeerations Center (Control' I 44.2 I 19.1 I 20.0 I 19.4 I 18.7 I 20.1 I ND I ND I ND I ND I 76.6 I 78.2 I ND I ND 54 Escondido Fire Station 31.8 16.9 18.6 17.8 16.9 18.0 ND ND ND ND 67.7 71.4 ND ND (Control) 61 Mesa -East Boundary 0.7 16.2 15.1 15.6 15.1 16.7 ND ND ND ND 64.9 62.5 ND ND 62 Camp Pendleton 0.7 13.9 12.6 12.8 12.6 14.2 ND ND ND ND 53.0 52.2 ND ND 63 Camp Pendleton 0.6 14.6 14.1 14.7 13.8 14.8 ND ND ND ND 58.3 57.5 ND ND 64 Camp Pendleton 0.6 15.8 14.7 15.7 13.9 16.2 ND ND ND ND 63.2 60.5 ND ND Page I 31 APPENDIX B 2017 AREOR 65 Camp Pendleton 0.7 14.1 13.3 13.7 13.0 14.3 ND ND ND ND 56.6 54.3 ND ND 66 San Ono fre St ate Beach 0.6 14.7 14.0 14.5 14.1 14.8 ND ND ND ND 58.4 57.4 ND ND 67 Former SONGS Evaporation 0.6 17.8 17.1 17.9 16.9 18.3 ND ND ND ND 71.2 70.2 ND ND Pond 68 Range 210C -MCB 4.4 15.8 16.4 16.6 15.6 18.1 ND ND ND ND 63.3 66.7 ND ND 74 Oceanside City Hall (Backup 15.6 14.0 14.3 13.7 13.1 13.7 ND ND ND ND 56.1 54.8 ND ND Control 75 Gate 25 MCB 4.6 16.7 15.5 16.3 15.9 16.7 ND ND ND ND 66.9 64.4 ND ND 76 El Camino Real Mob il Stat i on 4.6 18.2 18.4 18.9 18.2 18.8 ND ND ND ND 73.0 74.3 ND ND 77 Area 62 Heavy Lift Pad 4.2 20.2 18.5 20.9 19.3 20.5 ND ND ND ND 80.8 79.2 ND ND 78 Horno Canyon 4.4 11.7 11.6 13.7 11.4 11.8 ND ND ND ND 46.9 48.5 ND ND 11 Former Visitors' Center* 0.4 15.8 16.1 16.1 16.4 15.7 ND ND ND ND 63.1 64.3 ND ND 12 South Edge of Switchyard

• 0.2 15.8 17.0 16.9 17.0 16.7 ND ND ND ND 63.1 67.7 ND ND 13 Southeast Site Boundary 0.4 15.8 20.3 20.8 18.7 20.2 ND 5.1 ND ND 63.1 80.1 17.0 0.0 Bluff)* 15 Southeast Site Boundary 0.1 15.8 20.3 21.5 19.9 21.5 ND 5.8 ND 5.8 63.1 83.3 20.3 0.7 Office Bid a 16 East Southeast S it e 0.4 15.8 17.5 16.7 15.6 17.3 ND ND ND ND 63.1 67.0 ND ND Bounda a 41 Old Route 101 -East* 0.3 15.8 15.7 15.8 15.4 16.3 ND ND ND ND 63.1 63.0 ND ND 55 San Onofre State Beach (U1 West a.d 0.2 15.8 18.6 18.3 18.3 18.6 ND ND ND ND 63.1 73.8 10.7 0.4 56 San Onofre State Beach (U1 0.2 15.8 15.4 17.6 15.1 17.2 ND ND ND ND 63.1 65.3 ND ND West* 57 San Onofre State Beach (Unit 0.1 15.8 16.7 15.8 16.6 16.9 ND ND ND ND 63.1 66.0 ND ND 2 a 58 San Ono fre State Beach (Unit 0.1 15.8 17.6 17.7 17.2 17.1 ND ND ND ND 63.1 69.5 ND ND 3 a 59 SONGS Meteorolog i cal 0.3 15.8 19.9 19.6 19.3 20.6 ND ND ND ND 63.1 79.3 16.3 0.9 Tower* 73 South Yard Facility* 0.4 15.8 18.6 18.8 17.6 19.1 ND ND ND ND 63.1 74.0 11.0 0.6 NOTES: a. Station is within the Exclusion Area Boundary (EAB). The quarterly baseline has been estimated to be 15.0 mR within the EAB. b. ND indicates that the TLD did not measure exposure greater than 3cr 0 or 3cr A above the historical baseline , for that location.

See ANSI/HPS N13.37-2014 for information on the determination of 3cr 0 or 3cr A. C. Publ i c dose i s calculated based on an occupancy factor of 1 (f ull time exposure) for locations offsite. Public dose is calculated per SDS-RP1-PCD-1007 for locations in the EAB/CAB d. Station 55 includes neutron dose , estimated using a neutron signal (R n) conversion factor of 10.5*R n/rem (HPSTID 08-015) e. SCE-46 TLD lost in 01. Calculated value is based on ratio of SCE-46 to nearby location SCE-66 in 2016 04. f. 1.051 mrem/mR from ANSI N13.37-2014 , Section 3.2.1 Page 132 APPENDIX B 2017 AREOR b. Quality Control Duplicate Direct Radiation Samples Duplicate Quality Control (QC) TLD was installed adjacent to TLD #66. The duplicate TLDs agreed closely with the indicator TLDs, see Appendix C for results. These TLDs were not required by the ODCM and are not included in the Statistical Summary of REMP Data. c. ISFSI Direct Radiation Samples Independent Spent Fuel Storage Installation (ISFSI) TLDs were placed in the vicinity of the ISFSI. Data from these TLDs have not been included in the statistical summary of REMP data since these TLDs are not required by the ODCM. The ISFSI data are listed and discussed in Appendix I. 2. Airborne Particulate, Iodine, and Composite Isotopic Analyses Air particulate samples were collected on a weekly basis from seven indicator locations and from one control location. The samples were analyzed for gross beta activity, 1-131, and composited quarterly for gamma isotopic analysis. Sample locations were selected according to the req u irements of the ODCM. Gross beta analysis is a measure of total radioactivity of beta-emitting radionuclides in a sample. Beta radiation is emitted by many radionuclides, but beta decay gives a continuous energy spectrum rather than the discrete energy lines or peaks associated with gamma radiation. Gross beta measurements can only be used as an indicator of potentially elevated levels; i t does not identify specific radionuclides. Gross beta measurement data serves as a screening tool to determine if further analysis is required. All weekly gross beta activity analysis results were above the MDC. The concentration of ~ross beta activity in the samples collected from the indicator locations ranged from 0.009 pCi/m to 0.096 pCi/m 3 , averaging 0.025 pCi/m 3 of air. The concentrations of gross beta activity in the samples from the control location ranged from 0.008 to 0.091 pCi/m 3 , averaging 0.026 pCi/m 3 of air. There is seasonal variability to the gross beta results for air samplers, and the magnitude of the results in 2017 are not significantly different from what has been seen in previous years. Near the later portion of 2017 , there was a noticeable increase in the gross beta data for all locations , both control and indicators. This trend will be monitored in 2018, and the fact that the trend is evident in both control and indicator locations shows that this is not the result of releases of radioactive material from SONGS. Per the requirements of the ODCM, Section 5, Table 5-1 , an assessment was performed to determine whether the gross beta activity of the indicators exceeded 10 times the background ( control location #16). The results showed that indicator locations maximum gross beta activity in air in 2017 was 0.096 pCi/m 3 which is less than 10 times the average background measured at the control location (0.026 pCi/m3). No further action is required by the ODCM. Indicator samples analyzed for 1-131 were all identified below the MDC. No action was required by the ODCM. In summary, average quarterly air particulate sample beta activity from the indicator stations and control station have been compared historically through 2017. The average of the indicators trends closely with the offsite control values. The comparison illustrates that SONGS has not contributed to detectable levels of radioactive material in the environment around the plant. T here has been no detectable impact of the plant on air radioactivity. These stations are located near the site boundary downwind from the plant, based on the prevailing wind direction. The beta activity measured in the air particulate samples is from naturally occurring radioactive material. Gamma analyses are performed on quarterly composites of the air particulate sample s to determine if any activity is from SONGS. The gamma analyses have revealed no radioactivity from SONGS. Page I 33 APPENDIX B 2017 AREOR 3. Ocean Water Monthly ocean water samples were collected from three indicator locations near each station discharge and from the control location at Newport Beach. The samples were analyzed for naturally-occurring and SONGS-related gamma-emitting radionuclides, including tritium. Quarterly composite ocean water samples were analyzed for tritium according to ODCM requirements. Throughout 2017, only naturally occurring radionuclides were detected in the monthly gamma spectral analyses of ocean water. Monthly ocean water samples were also analyzed for tritium, consistent with the State of California Department of Public Health (DPH) split sample program. During 2017 all REMP ocean water sample results for tritium were below the count specific MDC. The da t a indicate that the operation of SONGS had no measurable impact on the environment as measured by ocean water. 4. Drinking Water In 2017, monthly drinking water samples were collected from one indicator location and from the Oceanside control location. Samples were analyzed for tritium, gross beta, and naturally occurring and SONGS related gamma emitting rad i onuclides. There is no drinking water pathway for liquid effluent at SONGS. No stat i on related radionuclides were detected in drinking water during 2017. Gross beta activity was identified in some samples, but gamma spectroscopy identified only natural radionuclides. The operation of SONGS had no impact on the environment as measured by drinking water. 5. Shoreline Sediment (Beach Sand) Beach sand was collected semiannually in 2017 from three indicator locations and from a control l ocation situated in Newport Beach. After collection , the samples were analyzed for plant related and naturally occurring radionuclides. Only naturally occurring radionuclides were detected in all samples. No plant related radionuclides were reported above the MDC. The operation of SONGS had no impact on the environment as measured in beach sand. 6. Ocean Bottom Sediments Ocean b ottom sediments were collected from three indicator locations and the Laguna Beach control l ocation. The samples were analyzed by gamma spectral analysis for naturally occurring and sta t ion related radionuclides. Only naturally occurring radionuclides were detected in ocean bottom sediment samples collected during 2017. Four non-ODCM ocean bottom sediment samples were obtained from two locations, Unit 2 outfall conduit and Unit 3 outfall conduit. The conduit samples were collected to measure the radiological environmental effect potentially resulting from the minor conduit leakage. Dur i ng 2017 , all conduit sample analysis results were below the MDC for station related radionuclides. The operation of SONGS had no impact on the environment as measured by ocean bottom sediments. Page 134 APPENDIX B 2017 AREOR 7. Marine Species (Flesh) Species of adult fish , crustacean and mollusks were collected on a semi-annual basis at the SONG S Unit 1 outfall , the SONGS Units 2/3 outfall and from Laguna Beach control location. The flesh portion of each sample type was analyzed for gamma-:emitting station-related and naturally occurring radionuclides. The results were subsequently reported to SONGS in terms of wet s ample weights. Because results based on a wet sample weight are most useful for calculating doses, the results of sample analyses are summarized in terms of "as received" wet weight s. No plant related radionuclides were detected above the MDC. Natura ll y-occurring radionuclides were detected in marine species samples collected during 2017. The operation of SONGS had no impact on the environment as measured by this sample mediu m. 8. Local Crops Fleshy and leafy crops were collected semiannually in 2017 from the SONGS garden and from the control location 21 miles SE from SONGS Units 2/3 midpoint. Tomato, cabbage, sorrel and yellow squash were sampled in 2017, and only naturally occurring radionuclides were identified. No plant related radioactivity was detected. It is concluded that in 2017 SONGS had no measu r able impact on local crops. 9. Soil To determine if there is evidence of a build-up of radionuclides in the land near SONGS, indicator soil samples were collected from Camp San Onofre, Old Route 101 , Basilone Road and th e East Site Boundary (Former Visitor's center). A control sample was obtained from Prince of Peace Abbey in Oceanside. Surface soil was collected from all indicator and control locations at the depth of 3 inches. The sampling protocol is consistent with the procedure descri b ed in HASL-300. Soil sampling is not required by the ODCM. Soil sa m ples were analyzed for naturally-occurring and SONGS-related gamma-emitting radionuclides using gamma spectral analysis. The 2017 soil samples showed measurable levels o f naturally occurring radionuclides. Cs-137 was detected in two indicator samples (0.042 and 0.193 pCi/g) and the control sample (0.046 pCi/g). Cs-137 in environmental soil samples at these levels is often attributable to residual nuclear weapons testing fallout or to the Fukus h ima accident. Cs-137 and strontium-90 (Sr-90) were detected in soil profile analyses conducted in previous years. These radionuclides are mostly due to the nuclear weapons testing fallout depositing on soil and retention of these radionuclides due to their long half-lives. The presence of Cs-137 in the ind i cator and the control locations in previous years supports the conclusion that the major source of this radionuclide is fallout deposition. During 2017 , the operation of SONGS did not have a measurable effect on the environment as measured by soil samples. Page 135 APPENDIX B 2017 AREOR 10.Kelp Kelp was collected in April and October of 2017 from the San Onofre kelp beds, San Mateo kelp bed , Barn kelp bed , and from the Salt Creek control location. Upon collection , the samples were analyzed by gamma-spectral analysis for naturally-occurring and station-related radionuclides. Naturally occurring radionuclides (such as K-40, Th-234 and others) were detected in all samples in 2017 , from both indicator and control locations. lodine-131 was identified in all samples from April 2017 , in both the indicator and control locations. 1-131 was not detected in any of the October 2017 samples , however. lodine-131 is a relatively short-lived radion u clide with an 8-day half-life. It is produced and released from operating nuclear power plants. SONGS is shutdown with the nuclear fuel stored in spent fuel pool so 1-131 is not being genera t ed. That , along with the fact that the 1-131 was identified in either all samples (April) or no samples (October) indicates that these positive results are not from SONGS operations. 1-131 has been detected at indicator and control locations in previous years. 1-131 data in ocean water samples near SONGS have been consistently indistinguishable radiologically from background. The northern control locations are too far away and in the predominantly upstream current direction for the 1-131 activity to be attributable to SONGS. The Salt Creek control kelp sample station near the San Juan Sewage Plant outfall has consistently yielded the highest 1-131 activity measured in kelp and has consistently yielded 1-131 above radiological background. Figure 10 shows a relatively close correlation between indicator and control locations over an extended period, further supporting the assessment that the likely source for this radionuclide is external to SONGS. (Note: Figure 10 includes all 1-131 results, including those that are below the MDC.) 1-131 i n Kelp 1.40E-01 ail :::,. u l.20E-01 l.OOE-01 .:!:: 8.00E-02 > .t:: > *t 6.00E-02 rtl 1 4.00£-02 2.00E-02 O.OOE+OO 2013 2014 2015 2016 -AVC 01-San Onofre -AVC 02 -San Mateo -AVC 03-Barn Figure 10 131 in Aquatic Kelp 2017 2018 AVC OS (Control) Refer to Figure 11 for the relative location of the kelp beds , the San Juan Sewage Plant outfall , and the SONGS outfalls. The data strongly support the conclusion that the 1-131 detected in kelp is attributable to medically administered 1-131 discharged through the San Juan Sewage Plant outfall and not to the operation of SONGS. Page I 36 APPENDIX B SONGS 2014 Kelp Samples . """' ~r 0 unita 2/3 Midpoint

• s,,n J..-n Ovlfol --o.iru-Figure 11 -Kelp Sampling Locations

11. Correlation of Effluent Concentration to Concentrations in the Environment 2017 AREOR In accordance with 10 CFR 50 Appendix I, Section IV, B.2, data on measurable levels of radiation and radioactive materials in the environment have been evaluated to determine the relationship between quantities of radioactive material released in effluents and resultant radiation doses to individuals from principal pathways of exposure.

REMP samples, both terrestrial and marine, indicated no accumulation of plant-related radioactivity in the environs. No samples exceeded investigation levels and, in fact, all samples with detectable activity were not statistically different from controls and were therefore attributed to non-plant-related sources-past nuclear weapons fallout , Chernobyl , Fukushima, and medical iodine releases in sewage. As such, the operations of SONGS did not have any measurable effect on the environment. The regulatory requirement to evaluate the relationship between quantities of radioactive materials released in effluents and the resultant radiation doses to individuals may be summarized by the following conclusion

Page 137 APPENDIX B 2017 AREOR Effluent program releases are evaluated annually to determine the receptor(s) with the highest hypothetical dose. The 2017 REMP sample data indicated no accumulation of plant-related radioactive materials in the offsite environment , thereby lending confirmation to the adequacy of the in-plant effluent controls program and dose assessments. Page I 38

---,. APPENDIX B 2017 AREOR B. Statistical Summary of REMP Data For 2017 Table 16 -2017 Quarterly Gamma Dose ~----* ----~-_. *-*----. ---* ',: t _7'.,. -,-,. ,,,. -,s -* ,, "( . *r. ' , --,***w ., * *, "*'. '~"'" ; . * ,.,_, -"'!. .,. ,*l,'1 '1 ,-'~, ** " ~~,*"=!/,_".'-~'-"~:/"'

• .,,q,* ..... ... *

,. , ',. _.. . . : ., :** *::, .. * .. ,,,,."' :~ -.. ' -* .. ,,. .. : . '{. <~~.,,"" ';.;-~\A~,/ .. f.~\f~{"-"~\t~~-. ' * * -., "* <-~'-} '~ ~:, ~-,-. *-., ;\' ,, ., TLD Southeas t S i te Dose per 91 days Gamma 195 5 16.7 (151/151) Boundary (Office Bldg) 20.8 (4/4) 17.0 (44/44) 0 (mrem/qtr) (9.7 -21.5) 0.1 Mi. ESE (19.9 -2 1.5) (13.1 -20.7) NOTES a Indicator locat i on TLDs include all REMP TLDs 5.0 miles or closer to SONGS 2/3 midpoin t b Control locat i on TLDs i nclude all REMP TLDs more than 5.0 miles from SONGS 2/3 midpoint c TLD data excludes QC TLDs , transit dose TLDs , and ISFSI TLDs Table 17 -Weekly Airborne Particulates Gross Beta ----. ' . . ...... ,. . *. -',,, .. .,,.,,,,, ... ~,-,~""'""'""".,;.,g,,;,,~- .... .... ----.. -. -_ -_ -_: ----:_: ~=-;-~~ :=\*: .. ;.~; ~-:.;~:~~;:_ -. :r:-;:*-r?_i::t** ~-.; > ~:;: :~!1 ------.. -----.. ----~ *_ __,__!._ ~~*-*"--:X~~~~~

, -----~ * * ..

.~ _:_* ~" -~*-_-*-~:-*\;,~.:::~:~"t't

---

. Air Filter Inhalation Gross Beta 415 0.01 0.025 (363/363) Mesa EOF 0.7 M i. NNW 0.029 (52/52) 0.026 (52/52) 0 (pCi/m 3) (0.009 -0.096) (0.013 -0.096) (0.008 -0.091) Page 139

--. ' APPENDIX B 2017 AREOR Table 18 -Weekly Radioiodine 1-131 Activity .... ,,~,*y-*-*, '" ,, *>'. ' ...... , *. ~-, .. ,~.,cy,-,-.~***ff-~ -,. '"r ... _ ,;:-.* --... _....~ -; ... ".,. .... ;**1';;* . . .. -. -. ----~-* .. , *-.---...... -~-*-.;._ .-~-----*-*

---

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'~ "" .. .. . . ' " * \'. .*; * :_ * ,* .::.: * -~-',. J>i ;; , ~~~,1*jfi:C;':,~,(:~:ri~~.1 . Activated Charcoal Inhalation 1-131 415 0.07 < LLD c (0/363) < LLD < LLD < LLD (0/52) 0 (pCi/m 3) NOTES a This table summarizes the weekly air iodine-131 cartridge data above the MDC. lodine-131 has an 8-day half-life. With reactor shutdown , it is no longer a radionuclide attributable to SONGS b LLD is the a priori limit as prescribed by the ODCM. c The Term <LLD as used means that results had no detectable activity above the minimum detectable. Table 19 -Quarterly Composite Airborne Particulate Gamma Activity . ....... -**-~-'"***-.----**-'>JI*---. ...........

• . :.: .. ;f*; : .* : ... * */};;*it+/-i~lf ' Air Filter Inhalation Gamma See < LLD < LLD (0/4) 0 Isotopic 32 < LLD (0/28) < LLD (pCi/m 3) Table 1 NOTES a Natural occurring radionuclides (K-40 , Th-234 and others) were observed in quarterly composite air samples in 2017. Page 140

' , " ' ' APPENDIX 8 2017 AREOR Table 20 -Monthly Ocean Water Activity (pCi/L) < LLD (0/50) < LLD < LLD < LLD (0/12) 0 NOTES a Natural occurring radionuclides (K-40 and others) were observed in samples in 2017. Table 21 -Quarterly Ocean Water Tritium (pCi/L) Tritium < LLD (0/12) < LLD < LLD < LLD (0/4) 0 Table 22 -Monthly Drinking Water Activity . ' ., ,*,. ' ... *--*-*-**** ., *..... *-*'""'*"--~- ' '( ,t,:, * --* ""¥ _ '-'.-<, W,,e's'~;,.~~f~} t"1~t,1;*""!"i,,._** ., ; ,;**;<:-<&

• • **'", -;i!;~---... ::'..:::__,, *. -: ,., ; '.L',' ',: ... st -----Drinking Water Gamma See 24 < LLD (0/12) < LLD < LLD < LLD (0/12) (pCi/L) Isotopic Table 1 Drinking Water Gross Beta 24 4 < LLD (2/12) Oceanside City Hall 3.71 (6/12) 3.71 (6/12) (pCi/L) 15.6 Miles SE b 2.37-5.64 2.37 -5.64 Drinking Water H-3 24 2000 < LLD (0/12) < LLD < LLD < LLD (0/12) (pCi/L) NOTES a Natural occurring radionuclides (Pb-212 , Pb-214 , Th-228 , Th-232 and others) were observed in samples in 2017. b The location with the highest annual mean for dr i nking water gross beta is a control location. 0 0 0 Page 141 APPENDIX B 2017 AREOR Table 23 -Semi-annual Shorel i ne Sed i ment Gamma Activity (pC i/g) ' ' " ,,., ' ' ' . ' ., ' " --; "' ,, .. ,. ,, .. """'*~-~, *:a . . . -. -** -___ _,, __ -------~-------

,._ ---. ----.----:----* ----* .. -~ " ... " :-: ... :'.\:_;;/gl Beach Sand See Direct Exposure Gamma < LLD (0/2) 0 Isotopic 8 < LLD (0/6) < LLD < LLD (pCi/g) Table 1 NOTES a Natural occurr i ng radionucl i des (Pb-212 , Pb-2 1 4 , Ra-226 and others) we r e observed in samples in 2017. Table 24 -Semi-annual Ocean Bottom Sediment Gamma Activ i ty (pCi/g) f.' -._. '** ., ,._ -r":_*:*":-_:-~:.?;*,t?~!'~~r:+:a ,* -----"S~ -------. -.--... -. .. ' ' .. ' . ----* . -Waterborne Ocean Bottom Gamma See Sediment Isotopic 14 Table 1 < LLD (0/12) < LLD < LLD < L LD (0/2) 0 (pCi/g) NOTES a Natural occurring rad i onuclides (Pb-212 , Pb-2 1 4 , Ra-226 and others) were observed in samples i n 2017. Page 142 APPENDIX B 2017 AREOR Table 25 -Semi-annual Marine Animal Gamma Act i vity (pCi/g) California Mussell Gamma See < LLD (0/4) < LLD < LLD N/A 0 4 Ingestion (pCi/g) Isotopic Table 1 Keyhole Limpet Gamma See N/A < LLD < LLD < LLD (0/2) 0 2 Ingestion (pCi/g) Isotop i c T able 1 Spiny Lobster Gamma See < LLD (0/4) < LLD < LLD < LLD (0/2) 0 6 Ingestion (pCi/g) Isotopic Table 1 Sheephead Gamma See < LLD (0/3) < LLD < LLD < LLD (0/2) 0 Ingestion (pCi/g) Isotop i c 5 Table 1 Kelp Bass Gamma See < LLD (0/2) < LLD < LLD < LLD (0/1) 0 3 Ingestion (pCi/g) Isotopic Table 1 Black Perch Gamma See < LLD (0/1) < LLD < LLD N/A 0 1 Ingestion (pCi/g) Isotopic Table 1 NOTES a Natural occu r r i ng rad i onucl i des (K-40 and o t hers) were observed i n samples in 20 1 7. Table 26 -Sem i-annual Local Crops Gamma Activity (pCi/g) ,. ' ,.,.,. r,~ .... ~-"; t;-'"f<'<<"-:"':- '--'< --,~, r ~* ..... :.~:-.~~'?;-~

.t

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'** .... ~' ' r .,. ' . " . Sorrell Ingestion Gamma See < LLD (0/2) < LLD < LLD N/A 0 2 (pCi/g) Isotop i c Table 1 Tomato Ingestion Gamma See < LLD (0/2) < LLD < LLD < L L D (0/2) 0 4 (pCi/g) Isotop i c Table 1 Cabbage Gamma See N/A < LLD < LLD < LLD (0/2) 0 2 Ingestion (pCi/g) Isotopic Table 1 Yellow Squash Gamma See < LLD (0/1) < LLD < LLD < LLD (0/1) 0 2 Ingestion (pCi/g) Isotop i c Table 1 NOTES a Natural occurr i ng radionuclides (K-40 and others) were observed in samples i n 20 1 7. Page 143 APPENDIX B Table 27 -Annual Soil Gamma Activity , 3" Depth (pCi/g) Gamma See < LLD (0/1) Isotopic 4 < LLD (0/3) < LLD < LLD Soil Direct Table 1 Radiation (pCi/g) Cs-137 0.18 0.117 (2/3) Old Route 101 3.0 Mi. 0.193 0.046(1/1) 4 (0.042-0.19) ESE (0.193 -0.193) (0.046 -0.046) NOTES a During 2017 naturally occurring K-40 and other radionuclides were detected above the MDC in most samples. Table 28 -Semi-Annual Kelp Gamma Activity (pCi/g) Kelp Ingestion (pCi/g) Gamma Isotopic 1-131 8 8 See Table 1 0.06 < LLD (0/6) 0.113 (3/6) (0.008 -0.113) < LLD San Onofre Kelp Bed 1.5 Mi. S < LLD 0.133 (0.133 -0.133) < LLD (0/2) 0.008 (1/2) (0.008 -0.008) NOTES a 1-131 was confirmed above the MDC in 4 of 8 kelp samples. 1-131 is known to be a constituent of sewage plant discharges due to medically administered 1-131. b During 2017 naturally occurring K-40 and other radionuclid es were detected above the MDC in most samples 2017 AREOR 0 0 0 0 Page I 44 2017 AREOR APPENDIX C.

SUMMARY

OF QUALITY CONTROL PROGRAMS Page I 45 APPENDIX C 2017 AREOR A. Summary All REMP samples are collected, shipped , and analyzed in accordance with NRC Regulatory Guide 4.15. Marine radiological environmental samples are collected by a vendor, MBC Enviro n mental , per the vendors Quality Assurance manual. REMP sample analysis is performed by the Contracted Environmental Analysis Laboratory (CEAL) in accordance with the Labora t ory Quality Assurance Plan. During 2017 the CEAL was General Engineering Labora t ory (GEL). The CEAL for REMP TLDs was Stanford Dosimetry. B. Quarterly Duplicate TLDs SONGS deployed a duplicate TLD package in the same location and canister as TLD 66. The quarter l y dose measured by these separate TLD packages is statistically equivalent. Table 29 -2017 Quarterly Duplicate TLD Data Comparison TLD 66 13.28 +/- 0.83 13.79 +/- 0.72 13.46+/-1.01 14.11 +/- 0.87 TLD 200 13.02 +/- 0.91 13.61 +/- 1.00 13.18 +/- 0.81 14.27 +/- 0.49 NOTES: a. Data is reported as mR per standard quarter+/- 1 sigma C. Annual Duplicate TLDs SONGS deployed a 12-month duplicate TLD package in the same location and canister as TLD 67. The annual sum of the quarterly TLD 67 exposure data is not significantly different from the annual TLD 201 results for the 12 months from July 2016 through June 2017. Table 30 -2017 Duplicate TLD Data D. Calibration of Air Sampler Volume Meters Air sam p lers undergo annual calibration using standards referenced to NIST on all REMP air sampler gas meters. When the gas meters are removed from service , the meter is calibrated and the calibration reports are reviewed for bias. This is an a posteriori review of the gas meter performance to evaluate method bias and to identify possible outlier analysis results. For 2017, the calibration reports for five of the air samplers used in the REMP were reviewed. The as found condition of these samplers were that some (2/5) were negatively biased , up to 28% low (at a flow rate of 1.5 scfm). Others (3/5) were positively biased, up to 22% high. A review of the air particulate beta results over the course of the year did not indicate a particular bias for any particular sampler. The trends in the beta results over the course of the year were consistent regardless of which sampler (location) was being monitored. Page I 46 APPENDIX C 2017 AREOR E. lnterlaboratory Cross-Check Program: The CEAL participates in a number of independent cross check programs, including the National Institute of Standards and Technology (NIST) and Analytics cross-check programs. A summary of the cross-check data is included below. In the 1 5 1 quarter of 2017 , the gross alpha analysis for water samples did not meet the applicable performance evaluation. This condition was i d entified and documented by GEL, via CARR170227-1085. The sample was re-analyzed with an acceptable result. In the 3rd quarter of 2017, the 1-131 analysis for water was not acceptable. GEL CARR170828-1125 documented the issue, and the lab determined that the obser v ed positive bias was an isolated occurrence and the laboratory 's overall process is in control. Per the 2017 Annual Environmental Quality Assurance (QA) Report, GEL was provided two (92) individual environmental analyses. The accuracy of each result reported to Eckert & Ziegler Analytics, Inc. is measured by the ratio of GEL's result to the known value. All results fell within GEL's acceptance criteria (100%) In 2017, the environmental TLDs, routine quality control (QC) testing was performed for dosimeters issued by the Environmental Dosimetry Company (EDC). During 2017, 100% (72/72) of individual dosimeters evaluated against the EDC internal performance acceptance criteria (high-energy photons only) met the criterion for accuracy and 100% (72/72) met the criterion for precision. The CEAL's performance meets the criteria described in Reg. Guide 4.15 and ANSI/HPS N13.37-2014. Page 147 APP E NDIX C F. Analytical Laboratory Cross Check Program Summary tiJ#tl Laboratories

u. a 11be1 h Gtl Cir.1 11 1> TABLE 2 GEL QUAR TE RLY lN TE RLABORATORY COMPARISO January through March 2017 Page6 o f 9 20 1 7 AREOR oel com Page I 48 APPENDIX C 2017 AREOR ma* laboratorles u , haut LG r:1p 1. 011 com Raport Cta.11119 I PT Cilullter I RKalwd ...... ....... Raporltld AaalJIMCI Al:c:apbnce P8rfonUlla Pro1IICII Y a* 0.. ...... .... lnta AllaMa v.-ValH Utnlta E valllabon EZA 4111120 t 6 02/2: 1 11 7 E 1 1 674 Car1r111ge

!>Cl IOclne-1 3 1 9.60 E t0 1 9.67 E+o t D.99 Acceatable EZA 4fll/20 t 6 02/2: 1 11 7 E 1 1 675 MIi k DC IIL slrorrtJum.119 7 . .86Et01 7.4.2 E+o 1 1.06 Accenl;,hle , EZA 41111211 1 6 IJl2!'2 1 n 1 E 1 1 675 MIi k pC L!l. stromlum-90 7.51lEtOD 1.00 E+o 1 0.75 Acceotallle EZA 4111/20 1 6 02/2: 1 11 7 E 1 1 676 MIik DCI/L IOdlne-13 1 1.0BEf02 9.1'4 E+o1 1.1 1 A.-n!:atlle EZA 41111211 t 6 02/2: 1 11 7 E 1 1 676 MIil pCI/L CE!llt.m-1 4 1 1.55EfOG! 1 A3 E+02 1.09 Acceptable EZA 41111211 1 6 IJl2!'2 1 n 1 E 1 1 676 MIik DCI/L am:im.llJm-51 3.29Ef412 2.BO E+D2 1.1 8 A.-nl;,t,le EZA 41111211 1 6 02/2: 1n 7 E 1 1 676 MIil pC I/L cetilll11-1 J4 t.67Ef02 1.78 E+o2 O.!M Aeceptable EZA dfh.'20 1 6 02J2 1/1 7 E 1 1 676 MIil DCIIL cetil1111-1 J7 UJEf(]2 1.2.6 E+02 1.1 3 -le EZA 4th/21l 1 6 02/2: 1/1 7 E 1 1 676 MIik pC V L Ccbalt-56 1.54Ef(]2 1 A6 E+02 1.05 /1.ccepbble EZA 4thl2D 1 6 02/2: 1/1 7 E1 1 676 MIil DCIIL MannanE!iSe,54 1.46EH12 1.29 E+02 1.1 3 -le EZA 4th/21l t 6 02/2 1/1 7 E 1 1 676 MIik pCI/L l ron-69 1.4SEf02 1.2:S E+02 1.1 6 Acceptat,le EZA 41n/20 t 6 02)2 , 1/1 7 E 1 1 676 MIik pC U L ,l lne-65 2.6BEf02 2.44 E+D2 1.1 0 Accealattle EZA 4111120 1 6 02/2: 1/1 7 E t 1 676 MIik l)CIIL Ccball-60 t.87Efll2 1.78 E+02 1.05 Accer:ilable EZA 4flll20 1 6 0212 1/1 7 E 1 1 677 Wate r pCI/L IIOdllne-1 3 1 1.06Efll2 9.18 E+o1 1.1 5 AfleeO!at>le EZA 4flll2D 1 6 0212 1 11 7 E 1 1 677 wat e r IIC V L Certt.m-1 4 1 1'.47Ef02 1 ,J.8 E+02 1.06 AcceDiable EZA 4int21l t 6 0212 1/1 7 E 1 1 677 'W.Jte r DCIIL Cl lll lmlt.m-51 3.0JEf02 2.7 1 E+02. 1.1 2 Acceol""4e EZA 4111120 1 6 0212 1 11 7 E t 1 677 Wate r pCI/L cetil!El-1 34 1.59EIC2 1.7J E+02 0.92 Acceotlt!le EZA 411112D t 6 0212 1 11 7 E 1 1 677 Wate r DCIIL cetilian-1 37 1 1.Jl!EM)q 1.22 E+D2 1.1 3 Aoci>otable EZA 4111120 1 6 02/2 1 11 7 E 1 1 677 Wate r pC I/L Ccbalt*S3 1.49Effl2 1 A2 E+02 1.05 Aooeoiatl4 e EZA 4111.'20 1 6 Ql2J2 1 11 7 E1 1 677 Wate r l!CIIL Man;..... -1.35Ef02 1.25E+02 1.D8 Aooeoiable EZA 4MD 1 6 02J2 1 11 7 E 1 1 677 Wate r pC I/L l ron-69 t.35 E f00 1.2 1 E+D2 1.1 2 Aooeo1""4 e EZA 4111120 1 6 IJ!l/2 1 11 7 E 1 1 677 W<1te r pC I/L Zlne-65 2.6 1 E ffl2 2.36 E+02 1.1 0 Acceoiable EZA 4lnl2D t 6 D2J2 1 n 1 E1 1 677 Wate r pC I/L Cllllillt-60 f.76E*412 1.72 E+D2 1.02 Acceotlble E RA 1 61/2017 2127/2017 RA0-1 08 wate r pC I/L Bar111111-1 3l 86.7 85.6 72.D-94..2 Acceotlble E RA f 61/20t7 2177/20 17 RA0-1 08 wate r DC IIL cetilll11* 1 34 51.2 52.6 42.4-57.9 Aa:Po1;,,t,1e E RA 1 111/2017 2127/2017 RA0-1 oa W.ite r pC I/L cetilll11* 1 J7 11 8 1 1 2 1 0 1 -1 26 >.ooepbl,le E RA 1 61 / 2017 2127/2017 RA0-1 08 IN,ate r DC IIL OOtl al l-al 11 8 1 1 3 1 02-1 26 ...,,,,.._e E RA 1 61/2Dt7 2127/20 17 RA0-1 08 wate r pC I/L lr!C-65 2D:2 189 170-222 """"'11:>llle E RA 1 111/2017 2127/2017 RA0-1 08 Wate r DCIIL Gro65 AIDIE 71.6 52.3 27.3-65.S Moot E RA 151/2017 2127/20 17 RAf>.1 08 W.ite r pCI/L Gro65A!plli3 69.6 52.3 27.J-65.S Moot E RA 151/2017 2127/20 17 RA f>.1 08 wate r DCIIL Gro65Beta 37.6 4 1.6 27.7-49.D ~e E RA 1 111/20 1 7 2127/20 1 7 RAD-1 08 Wate r pCI/L Rad l lllll-226 1 2.3 1.2.7 9.48-1 4.7 Acceotable E RA 1 5112 0 t7 2127/20 1 7 RA f>.1 08 wate r DC UL Rad l um.,226 1 3.1 1 2.7 9.48-1 4.7 ~e E RA 1 lil/20H 2127/20 17 RAD-1 08 Wate r pC I/L Rad l lllll-22.6 1 4.2 12.7 9.46-1 4.7 """"'11:>Ne E RA 1 51/2017 2127/20 1 7 RA0-1 08 Wate r llC IIL Radlum-22.8 6.31 6.2 J.83-8.DII .. """""abl e E RA 161/2017 2127/20 17 RA0-1 08 Wate r DCIIL R;ld l lllll-228 6.36 6.2 3.83-8.DB Acceol""4 e E RA t&t / 2017 2127/20 17 RA f>.1 08 Wate r llC I/L U ran\Jmf~\ 1 2.2 12.6 9.9 1-1 4 , 4 "'"""""""'e E RA 1 61/2017 2127/20 1 7 RA0-1 08 Wale r U<IIL ~*~-1 9.7 18.4 14.5-2 1.1 Alloeobl>le E RA 1 lil/2Dt7 2127f20 17 RA0-1 0 8 W<lte r UQ/L ~1 N11 1-1 8.9 1 8A 14.5-21.1 Acce..htv e Page 7 o f 9 Page I 49 APPE N DIX C 2017 AREOR tilll Labo atories LL rl '11 nb r O' T h e G l:L t.rJ IIP

• oe1.c001 -,-,~ -Raport CIOllltll 1 PT Gllatert ll-'Wd ....... ..... RaporleCI ANWWCI A.ccap1anca Parfol.-Pravldl Ya* Dolt ........ .... Ul1lta AnaMa YUM Value Llmlhl E.ltalUallon ERA 1 15l/20 f 7 2127!20 17 ~1 08 Wate r llCLIL 'T ritium 1 130D 1:2500 tD90D -13800 Acceotible ERA 1 15l/20 1 7 '2mlm 17 ~1 08 Wate r llCI/L Trt!Jum 1 1 60D 1250 0 109 0D-13800 &"""'*""'e ERA 1 5l/2Qf1 2127!20 1 7 HAl>-1 08 Wate r !>Cl.IL slron!JurTH19 60..2 55.5 44.3-63.2 ~e ERA 1 51 1 2017 2.l'l7/2D 1 7 RA0-1 08 Wat.e r llC LIL strvnllum"89 54.S. 55.5 44.3-63.2 Accenl:mle ERA 1 6l J 20 1 7 2.!27/20 1 7 ~1 08 Water !>CUL stronlkJm-go 35..9 43.1 31.8-49.5 ~e ERA 1 51/2017 2177/2'0 1 7 ~108 Wate r l>CLIL Slrontlurn-90

-:n.7 43.1 31.B-49.5 Accent.lile Page8 o f 9 Page I 50 APPE N DIX C lCU1! laboralorieS 1L c a rib r o* T he Gtl Clr:iup *1. TABLE2 GEL QUARTERLY INTERLABORATORY COMPARISON Apri l through June 20>17 Page 6o f 12 2017 AREOR oet.com Page I 51 APPENDIX C 2017 AREOR *mill Labora ories u , a mb r l h l OE L G r lul) o el co --.---lllpOlt .._,.._ P1' a.111-, ......... . ... ...... GB. ic-...... Pnllllllllf y., .,. ..... .... u..t a-...., IIIICldl ¥11111 .... .. E........_ EZ/1 fW2017 07/07/17 E118 1 8 Cartrlmie IIC I l od l Be--131 9.93E 4M 9..46Ef.0 1 1.05 Accerriable EZA f&t'2017 07/07117 E 11819 MI i l l>N J1 strma.u n-8!1 8.86E&m 9..96 E*0 1 D..89 ..,,,,.,,.,._e EZ/1 tlil/2017 07/0 711 7 E 11819 MI i l errn Slralt.'um-90 1.97Ef0 1 2.,SSEf.0 1 D..77 --e EZA fW2017 07/07/17 E H820 MI i l r>r.1!1 I DdlBe--131 9.57EfD1 !l .. 68E*G 1 11.99 ~e EZ/1 Utl20 1 7 07/0 7117 E 11820 MI i l ""'" CEl1Um-1 41 1.2 1 Ef02 U 9E*D2 1.02 AccenbNe E Z/1 1W2 0 17 07/07117 E 11820 MI i l BCl/l Ctlroll1Um.S 1 f.7Ec.m 7 1 2E*D2 D..83 -e. EZA 1&t'2017 07/07117 E11820' MIil OCI IL CMll..lm-1 34 1.7 1 Ef02 U9Ef.02 0.9 Aooeotallfe EZ/1 t W2017 07/07/1 7 E11820 MI i l BCl/l CSlm-1 37 23 1 E4l!Q 2..27Etll2 1..112 -e EZA 1&t'20 1 7 07/0 7117 E11820 MI i l l>CIIL Cei>alt.S8 t.8!1Ef-02 1 .. 78Ef.!l2 1.06 -e EZA t&t'20 1 7 07/07117 E 11820 MIil l>Cl/l. Manaa-54 274Et02 2A9Et-D2 1.1 AcceplatJle EZ/1 1W2ll 1 7 07/07 11 7 E 11820 MI i l r>Cl/l l'00-59 1.35ct02 1.27Et!l2 1.06 Acceotlble EZ/1 t&t'20 17 07/0 7117 E 11820 MI i k pCl/1. Zin~ 3.22Et02 2..96Et!l2 1.09 AttoPnt"'1lle EZ/1 tW2ll17 07/07117 E11820 MI i l OCl/1. COiia~ 2.85ct02 2.93Etll2 11.97 Acceotlble EZA f6112ll17 07/07117 E1182 1 Wate r l>Cl/l lodlne-131 9.6EEMl1 li.79.E.0 1 1.1 -e EZA 161.'20 1 7 07/07117 E 1182 1 Wate r pCI/L CerlUm-1 4 1 1.24Ef02 1..19 E+ll2 1 .. 0:S AcceplatJle EZA tW2ll17 07/07117 E 1182 1 v,ate r llCl}l. CITilmlUm.S 1 2'.43Et02 2.11Etll2 1.t5 ~e EZA t6112ll 1 7 07/07117 E1182t Wa!E r DClll Ceia.Jm-1 34 1.84Ef02 1..86Ef.!l2 D..98 -e EZA 16112 0 17 07/0 7117 E1182 1 Wate r pCI/L Ce61Jm-1 37 2.(!IEt-112 2..2f>E+D2

1.1 Acceotlble

EZA f&t!2017 07/07/1 7 E 1182 1 wate_r oCI IL Cobalt.SS f.8EEt02 1.77Etll2 1..0 6 AccetJtable EZA t&l.'2017 07/07117 E 11821 v,ate r pCI/L Mang.inoe&e-54 2.7!1Et02 2..45E+D2 1.13 Accl!Dlallf e ED. 16112D17 07/0 7/1 7 E1182 t Wate r i>CI IL l'00-59 UEEt02 1.27E+ll2 1.15 Aa:ent3ble EZA t5/J20 1 7 07/0 711 7 E11821 Wate r i>Cl ,'l Zin~ .l.36Ef-02 2.95E+IX1 1 .. 1 4 Aaler!table EZA t&l.'20 1 7 07/07117 E 1182 1 Wate r oCl/1 CObalHiO 3.07Ef-02 2.92E+02 1.05 Am<>lllable MAPEP.1 7* MAPEP 211<1/20 1 7 06/131 1 7 M3S36 SO I B~ Amerleltn-24 1 65..7 67J) 46.9-fil'.1 Aaleotlble MAPEP-1 7* MAPEP 211dl'20 1 7 06/13117 MaS36 SO I B!IIICn CPs!l*m-1 34 1 470 1 5:50 11)65-20 1 5 ~e IMPEP.1 7* MAPEP 211<1/20 1 7 06/1 3117 MaS36 SO I 8!111C<1 Ce41m-1 37 679 6 1 1 428-794 AalPnt.bie MAPEP..17* F.al6e Po6 MAPEP 2n.<1/20 1 7 06/13117 Mas36 SO I B IIIK<1 Col>.ilt--57 11.8 1 2 Te6t Nllll>Olable MAP E P.1 7-MAPEP :211<1/20 1 7 06/1 311 7 Mas36 Sl:I D Bfl'.KG Cei>alt-60 958 Ht 624*1 1 58 Accerrta1>1e MAPEP-1 7* MAPEP :2r1<1Q0 1 7 06/13117 Mas36 so n B""'" ron.ss 804 8 1 2 568-1 056 A-e MAP E P.1 7-MAf>EP 211<1/2017 06/13117 MaS36 SO I 8(111(11 ManQ:ane~ 1 000 967 6n-1 257 AcceDtlble MAP E P.1 7-F.al6e Po6 MAPEP 2ndl'20 1 7 06/13117 Mas36 SO I Bfl'Kll NlcleHi3 -.46 Te6! Acceptallle MAPEP.1 7* MAPEP 2n<1/20 1 7 06/13117 MaS36 SO I Bfl'l(q PlulonlUm-238 D.,574 0.4 1 Sen!;. E\laL M>lll'Dlaillle MAPEP.1 7* MAPEP 211<1/20 1 7 06/1 3117 M3S36 SO I B..., .. ,. P1ulonlllrn-2J912.W 51-2 59.8 41.'~n.7 -e MAPEP-17-MAPEP 211dl20 1 7 06/13117 MaS36 SO I B~ Potali6ltsn-40 624 f,(11 42~78-9 AnlPnlaillle MAPEP-1 7* MAPEP 2ndl2017 06/1 3117 MaS36 SO I 6(111(<1 Slronlllm-'10 548 624 43H!t 1 Aaler!table MAPEP-1 7* MAPEP 211<1/2017 06/13117 MaS36 SO I B!IIICn Tecmelltn-99 64 1 656 4:59-853 Aaleotlble MAPEP-1 7-MAPEP 2nc1fl0 1 7 06/13117 MaS36 SO I Bfl'Ka U-2341233 56_9 48.1 J3.Hi2.5 -allle Page 7o f 12 G L Page I 52 APPENDIX C 2017 AREOR ii r,t) r O hll Gf.L Gr Ju p I oet com IIIINNt ...._...._ PT au.w , bcll¥NI ..... ...... Ga .... ....... y-.,... ...... .... Ulllt AalMl/lllldlll ,,_ ...... Raio E......_ MAP E P..17-MAP6? 2'1<1!2017 0611J.117 Mi1S36 SO I Bla'KQ tJr.ln l in.-ZJ8 53_9 48.ll .14 .. 2-63..7 ADC:eaiable MAP E P..1 7-'Fal5e P'o6 MAP6P 2ndl20 1 7 06ltJ117 MilS36 SO I B""'" Zi nc~ -4.0 T e&! .........,tallle MAP E P.17-0.800'0 0..846 0.592-t.1 MAPEP 2ndtl(l'17 D6l1Jl17 Maw36 Wate r --Amerltltn-14 1 AcceotltJl e MAPEP..1 7-0..037 F.al6e P'o6 MAPEP 2ndl201'1 IJ6/t Jl17 Maw36 Wate r --Cemm-1 34 Ter.t Acoeotlllte MAP E P..17-1 22 11.1 7.8-14.4 MAPE? 2ndl20 1 7 D6 l 1Jl17 Maw.li6 water BQ, 1.. Ce&\Jm-1 37 Aaleaiable MAPEP..1 7-29..0 28.5 MAP6P' :111dt2017 D6 l fJl17 Ma"'1J6 Wate r Ftnl'I Cot>a lt-57 20: G-37.1 ~e MAP E P.1 7-1 2.8 1 2,l 13..6-1 6.0 MAPEP* 2ndl2017 D6l1Jl17 Ma'NJ6 ware r -cttia~o ADC:enbllle MAP E P..1 7-245 249 MAPEP :111dl20 1 7 D611Jl17 Ma'l'IIJo wate r Boll 11¥Cll'.1Xlen...J 17 4~4 Acoeolatlle MAP E P..1 7-2.111 1.7 Senli. &al.. MAPEP :111dl20 1 7 D611Jl17 MaVi/36 Wate r Boi l. l mn-55 Aa:eotible MAP E P..1 7-1 5.7 1 4.9 1 0.4-1 9 , 4 MAPEP :111d/20 1 7 06/1Jl17 Ma'IVJ6 Wate r Ftnl'I Manoanelil!-54 ADC:eot.>N e MAP E P..1 7-13.6 1 22. 8.£-1 5.9 MA.PEP* :111d12'11 1 7 IJ6/tll17 M.t.'1136 Wate r Boll NlekfHiJ Aaleaiallle MAPEP-17-11..635 D.70J D.492--0.9 1 4 MAPEP 2ndl20 1 7 IJ6/f3117 Ma','IIJo Wate r BQ, 1.. Pll.llonlUm-236 ADC:eDiallle MAP E P..1 7-D.841 Q.!J34 D.654-1.2 1 4 MAPEP 2ndl2017 IJ6/1Jl17 Maw36 Wate r --Pt uton1U m-Z3!!12.40 ADl:eDlabll! MAP E P..17-276 254 1 7B-3JQ MAPEP :111d/20 1 7 06/1Jl17 MawJo wate r -Pofa&&ltn-40 ~e IMP E P..17-D.443 0..504 D.353-0.655 MAPEP :111dl20 1 7 06/13117 Ma'iVJ6 ware r Boll Radlllm-226 ~e MAP E P..1 7-9.27 1 0.1 7.MJ.1 MAPEP* 2nd!l0 1 7 06/tJ/1 7 Ma'tllJ6 Wate r Boll Slran!aim-90 Aaleotlbie MAPEP-1 7-5.111 6.~ MAPEP* 2nd!l0 1 7 06/13117 Ma','IIJo Wate r Bai\. Tedlnetll.llll-9!> 4.3B-8.13 ADl:e 1J tll>le MAPEP-17-1.11 1.1 6 0.81-1.5 1 MAP E? 2ndl20 1 7 06/tJ/17 MawJ6 Wate r Rlll1 lkall l um-234.1233 AttoPn1:m1e MAP E P..17-1.16 1.20 OJ!4-1.56 MAPEP* :111dl20 1 7 06/13117 Maw:36 Wate r Elnll tJr.ln l tn-238 Aml'Di.mie MAP E P-17---0.0SD$ Fallie Poli MAP6P :111d!l0 1 7 06/1Jl17 MaWJ6 Wall!r BQ/1.. Z)nc,65 T E!!i t """"'tabl e MAP E P..1 7-Fal&e Poli MAPEiP 2ndl20 1 7 06/tJl17 x:a:WJ6 Wall!r Boll_ l odlne-129 O.Cl 1 TE!it Aa:ent>ble MAPEP-1 7-D.05! 11..0623 D.0436-MAP6P :111dtl017 06/1 Jl17 RIIFJ6 -un1,;;amn1e tkan l tn-235 D.Cl8 1 0 At>rlPrlbhle MAP E P..1 7-8.49 6.6 6.0-1 1.2 MAPEP 2ndtl017 D6/1 Jl17 RIIFJ6 Flll!f tJl1/l;;lfflCle lkan l l.lll-238 Aml><>lable MAP E P..17-8.55 3.7 6.1-1 1.3 MAP E P :111llll0 1 7 06/1Jl17 R!lFJ6 Faer ~le Ur.¥11Um-T o&al ~ble MAP E P..17-0.0386 D.0376 0.0263-MAPEP 2m l/2017 06/tJ/1 7 RIIFJ6 Flier Bol5amlll,;, AmentflEl , , 24 1 0: 0489 ~Ille MAPEP-17* 1.38 1.42 MA.PEP 2nd/20 1 7 D6/t3117 RIIFJ6 I_,,, Rn!D m nle C1!61Jm-1 J4 0.99-1.115 """"'tlbll! MAPEP-1 7-D.781 0.685 D.48(1-{l.89 1 MAPEP :111dtl017 06/1 3117 RIIFJ6 mer Rnl=mnle Cewm-137 ~"'11e MAP E P..1 7-1.n 1.70 1.1 9-2.2 1 MAPEiP :111d!l0 1 7 06/131 1 7 RIIFJ6 mer Rnl=mnle Cooo ll-57 ~e MAP E P..1 7-D..86J 0.78 0..55-1.0 1 MAPEP 2ndtl0 1 7 D6 l 1Jl 1 7 RIIFJ6 Rief Bnh.l m nle Cooo!HiD ....,,,.._e P age 8 o f 12 G EL r*lrkiel UG pg ,m ,r t>*i*** ,;,;2911, !!)el~-:o.i.. 1-e-1 ~...,"',11 11 ~.-, ,.,..;111-1 .. .......,.., Page I 53 APPENDIX C 2017 AREOR feJ=i l L ab r a t ories t t

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~;oNe MAP E P.17-D.lD5 D..1 04 D.D73-0.1 J5 MAPEP 211d!l017 1'.11Kt31 1 7 R II F J6 FIiter BQ/6amc,l.e Ul'all l t.m-2J4123l ~e MAP E P.17-D..tD6 D.1 07 D: D75-0.1 J9 M AP E P 211dl20 1 7 06/1 311 7 R l2 F J6 Fli er ..., ,._=""e ~l lnl-2311 A,,r,onl""'e MAP E P.17-1.l4 1.29 0..9-1.68 M APE P* 2nd/20 1 7 DIK13117 R l2 F J6 Filer An h<:>m llle Zl 1'1Mi5 Aocemalll e MAP E P.17-D.OOD4 1 t F ali'ie P'o5 M APEP 211dl20 1 7 06 1 131 17 R IIIIJ6 \k>oPbll!Jll RoJg m ole Amertclum-24 1 Tl!li<t Aoceptlble MAP E P.17-6.56 6..95 4.87-9.GI M APEP 2nd!l0 1 7 06 1 131 1 7 R IIIIJ6 Vf'OPL11fm El!Jh.a m ol" CeaJm-1 34 Aeceplable MAP E P.17* 4.B4 4.60 3.22-5.918 M APE P 2neli2017 06 1 13117 R IIV'.lo """"tal!Oll An1t::1 m llf e CeaJm-137 Aocenbhle MAP E P.17-0.014 1 Fa151! P'o5 M AP EP* 211d/20 1 7 06/t 311 7 R llv.l6 v,,,,.,bUoo Rn 1<;;>mr1e Cc!>alt'57 Tl:S l Accectlllle MAP E P.17-9.33 8.75 M APE P 211dl20 1 7 06/t JJ1 7 R IIIIJ6 IIPnPtiHm Bo}&amClle Cd>a lt-60 6.1 3-1 1.36 Aoceotlble MAP E P.17-3.39 3.23 MAPEP 2ndfl0 1 7 D6lt 3l1 7 R II\IJo VeQelall!lll Bolliamole ...,,""""'e&e-54 2.J.-416 Aoceotllllee MI\P , E P.17-0.0506 IJUJ::198 D.04 1 9-M APE P 211d!l0 1 7 06/U/1 7 R IIVJ6 V"""""on ..., ,., ,~""e P l ulonlllm-2311 omn ~e PMP E P.17* Oc 07S4 D.1189 O c~2-0.1 66 M APE P 211di2!!1 1 7 06/13117 R IIVJ6 \H><l<>btlon An*1£.>mn1 e Plll!Dr11Um-23g.1240 Acceotabi e MAP E P.1 7-1.50 1.75 M APE P 2ndfl0 1 7 06/1 311 7 R IIVJ6 VPoPt.Hm Bohamole SlrCl1 D l.ffl-9D 1.23-2.24 -.,tlbl e M/IP E P.1 7-0.1 9 0.1 79 D.1 25-0.2JJ MAP E P 2ndfl0 1 7 D6lt Yl 7 R II\IJo VeoelaUDrl Bolrwlmllle l.lran l t.m-234J233 ~e MAP EP.17-1.900 D.1 86 0.1 30-0242 M AP EiP 2nd/20 1 7 06/1 3117 R IIVJ6 '"""'lalloo ..,.,.,="' e 1 1 ran 1 11111.-2J8 """"'1f""'e MAPEP-1 7-6.26 5_39 3.17-7.01 M APE P 2nd!l017 06/131 1 7 R CIVJ6 V"'1Pl;d1m Bofliamcl.e ZI~ Acceotalll e ERA 2 ncl/20 1 7 DS/2Jl17 MRAD-26 SO I ""'"" Actlnli.m-228 1 240 1 2 4 11 795 -1720 A cceciabl e ERA 2 nd/2017 DS/23117 M RA0-26 SO I ,,,,,_ AmBlclum-24 1 4l!lll 443 262-582 AmeEltlbl e ERA 2ncl/20 1 7 DS/231 1 7 M~ So l DCl/lQ B?srnl.llll-2 1 2 !329 1 2 4 D 3JD-1~20 Aoceptil>l e ERA 2oo/20 1 7 D S/2Jl17 M RA0-26 SO I nr.l,..n B1:5nVJlll-2 1 4 2790 275D 1 660-396D AoceDlable 57 9 0-ERA 2ncl/20 1 7 05il23/1 7 M RA0-26 SO I ,,..,,,.,, Cewm-1 34 866(), 886D 10600 Aoce-1! ERA 2!Vl/20 1 7 OS/2Jl17 M~ SO I """ll" CE!Qlm-1 37 aJOO 7S O D 5750-9 65D Acce""""'e ERA 2nd/l:0 1 7 DS/23117 M RA0-26 So l --C~IH'iO , 4620 4430 3000-6 1 0 0 ~e ERA 2 ncl/20 1 7 O S/2Jl17 M RAD-'lb SO I nN/l'n L.e ad-2 1 2 1 JOO 1 2 4 11 812 -1 730 Aoce"'""'I! ERA 2nd/l:0 1 7 DSl2J/17 MRA0-26 SO I DCl/ln Le ai:1-2 1 4. lt70 2&90 1 690-43 1 0 ~e ERA 2ncl/2017 DS/23117 MRAD-2ti SO I nr.111'.n Marvrafll!-5'1. cJ8.6 <<1000 0.00-1 0 0 0 Aoceptlbl e ERA 2ndtl0 1 7 0 512J/17 M RAD-'lb SO I nr.flm P I U1llr11Um-236 4"N 6411 390-894 Aa:eDlalll e ERA 2!¥1/20 1 7 OSl2Jl17 MRAD-26 So l DCl/lo P l utonlUm-239 442 484 3 1 6-669 Aa:eDlallle 774D-ERA 2111112.017 OSl2J/17 M RAD-26 SO I ..rtn.n Potl6 6 h El4D 1 1 000 1 0600 14200 --I! J49D-ERA 2ncll20 1 7 0 5123/1 7 MRAD-26 SO I =-Slrmmim-9D 6 1 50 9 1 5D t4SOO Aoceolabl e P a ge 9 o f 12 G l!!lliltor -~ .. Page I 54 APP E NDI X C 20 17 AREOR Meil laboratories uc a rnti r o J h uE.L ti nup aer com IIIPDft PT a..tw , ...... ..... GB. 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UIIII AINMa l ..... v... -RalD E...._ ER.it. 2IICIQ017 05.'23.1'17 MRAD-26 SO I DCl}m Tool1Um-234 3360 1!MO 61't-3GSO Acceclalble ERA 2ndl20 1 7 05.123J17 MRA0-26 SO I r>Cl.tQ 1Jt311 1 11J1-234 1 820 1!!5D 1190-2&10 Accelllable EM 2IICIQ017 05123.1'17 MRADc26 SO I DCl.tn lk.ln l 11J1-234 2030 1!!5D 1 1 90-2&1D Acceot3ble EM 2ndl.l0 1 7 05'2JJ 1 7 MRADc26 $0 1 r,Cl , l'.fl! lkan l llll-234 24 10 1!!5D 1190-2&10 Acce<Jbtlle EAA 2rv:1/2!0 1 7 05123117 MRAD , 26 SO I pa.~ lk.ln l mn-2311 1 800 1 g*40 1 200-2460 AccefJtlllle EAA 2!ldfl0 1 7 05123117 MRAIJ.26 SO I DCl , l:q lkan l mn-238 1 970 1 940 1 200-2460 A.ml>m:llble EM 2IICIQ0 1 7 0512J117 MRAD-26 SO I r>Cl,I.Q Ut311 1 11J1-238 1 4SO 1 940 1200-2460 Accetiltll>le EM 21lC1121D 1 7 05'23 117 MRAD-26 SO I DCl/m UranlUm-T olal !540 3980 2 1 60-5250 AccentlilJie EAA 2lli1/20 1 7 05123117 MRAD-26 SO I DCl.bl UranlUrn-T<<ai 3750 3980 2 1 6'01-5250 Acceot.ble ER.it. 21111!20 1 7 05.'2Yl7 MRAD-26 SO I DCl/la UranlUrn-T olal 4090 3980 2 1 60-5250 Accer:rtal>le ERA 211i112017 05123117 MRAD-26 SO I ~'lq UranJum. T olal 3860 3980 2 1 60-5250 AccentlilJie Ui:anJurn-Tolal ERA 2ndfl0 1 7 05'23 11 1 MRAD-26 SO I 119'lll (m:a6'l 52ro 5BOO 3200-72:90 Accectlble UranlUm-T otal ERA 2ndl1'0 1 7 0512JJ17 MRAD-26 SO I u a..., l mas6 l S42JO 58011 3200-72:90 Aocef'll"'11e Ui:anJurn-T olal ERA 21111120 1 7 05i'2JJ1l MRAD-26 SO I , inr>n (mai;&\ 5000 5800 3200-72:90 Acceni-e UranlUm-Total ER.it. 2IICIQ0 1 7 05123117 MRAD-26 SO I pqllq (mast;) 4440 S80D 3200-7290 Acce<Jbtlle ERA 2ootal 1 7 05i'2JJ17 MRA0-26 SO I ......,,.n ZI~ 702JO 60911 4IIS0-8D9D ~e ERA 2ndt20 1 7 0512J/17 MRAD-26 VPOPU n an DCl/ln Aml!l1dUm-2 , U 17 00 1 860 1140-2470 AmPt'hllle ERA 2ndt2017 0512J117 MRAD-26 ""'1<>1"'1Qll r>Cll:tn ceairn-1 341 1 660 1 83D 1 1 80-2380 AccenhNe ERA 2ndl1'0 1 7 0512 311 7 MRAD-26 """"iatlon ..,,.,,_ CeslJrn-1 37 24 70 250D 1 8 10-MSD ..,,,..,,..,.,,.e EM 2IICIQ017 05123117 MRAD-26 Vf>nP.l.."111nn DC,1:Q C~.ilt-611 1 350 1 39D 959 -1940 AttlPnt:ohle ER.it. 2!1iCll20 1 7 OSl2JJ17 MRAD-26 "°""'""llill ""'l:a CUl1Urn-244 629 Ž 360 -11 ,40 -"'e EM 2n<lt2!0 1 7 05123117 MRAD-26 v-lat!an DCl/ld Mancran ese-54 <32_2 <JOO 0.00-300 Att,>m3ble ERA 2nd1 7 05123111 MRAD-26 Vl'nPlallan r>r.111:n l'l tmnlUm-2.33 2aso 325D 1 940-445D Accent.hie ER.it. 2rw:ll20 1 7 05123117 MRAD--26 -on ...,,,_ l'l lnlnJurn-239 1 990 2 1 5D 1 320-29611 Acce-1! 22JOO-EM 2ndfl!0 1 7' OSl2Jl17 MRAD-26 Vl'nPl.al!on r>r.11:tn PotlS611J'TI-40 30900 J090ll 43400 Accenl'"11e EM 2ncl/20 1 7 05123117 MRAD-26 VM>>L*UIJn ""'*"" Slmll b im-90 70 1 726 414 -963 Accer,1,."'e EAA 21111Q0 1 7 D5123!17 MRAD-26 """'"'"""" N'l,I.Q Uran l ll:!l-234 2720 3090 2030-3970 -e EM 2ni:lt.!0 1 7 0512 311 7 MRA0-26 V-lallCin n.r.i.to l.kan l um-234 3080 309D 2030-397D AcceniEle EAA 2ncl/20 1 7 D512J/17 M RAD-26 VP<1l't.llloo nCl.tQ Uran l um-2J8 .282!11 306D 2040-JllaD Aml><Jiable EAA 2f'll/20 1 7 05123117 MRAD-26 v .. ,11 , b ll OO n.r.i , to Uran l 11J1-238 302!11 306D 2040-JB91l Accenl""'e EM 2f'll/20 1 7 OSl2Jl17 MRAD-26 """"lallon ""'-UranJurn-T ob l 5'J'70 6290 4260-7BJ D A"""""""'e EM 2ndfl0 1 7 05123117 MRAD-26 V-'~IIOII DCl/10 UranJum-Tota l 5690 6290 4260-7BJD .. .,....,,._.e EAA 2ootal 1 7 OS/23J17 MRAD-26 lh>al'taUllll DCI-UranJurn-T Ola l 6238 629D 4260-71330 ~e UranJum-T Olal 6200 -EM 21¥1120 1 7 05123111 MRAD-26 V-'~*an '""""' 1 mas1;1 89 1 0 9250 11700 MY*or,h'hle UranJurn-T Olal 6200-ERA 2IICIQ017 05i231 1 7 MRAD~ veaecauoo ll(Vlq (fflasti) B44l) 9250 11700 Acceotlble UranlUrn-T olal 6200-EM 2ndQ0 1 7 05123117 MRAD-26 VeoetaUan ua'la {ffl:a6') 9000 9250 11700 Allceoiabl e ERA 2ndQ.0 1 7 05123117 MRAD--26 \leoetallan =~ Zlnc:"'65 907 353 6 1 5-1 200 Acceotlbie ERA 200l20 1 7 05123117 MRAD-26 fller r,CI.IFU;>< Aml!l1Clum-24 1 80.6 7&A 47.t -1 03 AttPlll"'1:lle EM 2nda0 1 7 05123117 MRAD-26 Flier DCIIFUer Ce&\Jrn-1 34 H40 11 00 700 -1 360 Accem3llll! ERA 2!1iCll20 1 7 05123117 MRAD-26 Flier l)Q'Fl&r Ceairn-137 1490 1 J9D 1 040-1 B'JD Accem,1ble ERA 2ndl20 1 7 0512J/17 MRAD-26 Flier DC&'Fller Ctlbiil ll-611 1t2JO 1 D30 797 -1 290 AnlPnbihle ERA 2nd1 7 OSl2Jl17 MRAD-26 FIie!' DCIIFl!ef l llli!l ,-515 242 256 79.4-500 AcceCltlble Page 1 0 of12 l'M.t.JM , t 1 n pr ,tiJ ,?ll , T l 7J P a ge I 55 A PP ENDIX C 2017 AREOR i[!lal L.aboratorles u c d n Mb I l hl!I GE L (j r Jup oel com Raport Acn11*-PT au.tar-I R8Clllnll

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S1rmCUm-9ll 52.2 52.4 25-6-78.;5 MCentmie ERA 2111dl2i11'17 0512Jl 1 7 MRAll*26 fDef DCl'Fllter lkiln l llnl ,-'l.14 71.1 73.t 45.3-u o Aecent.1Ne ERA 2ndl20 1 7 OS'231'17 MRAD-26 Flier t!Cllflller L'ran l!E1-2J4 79 73.t 45.3-11 0 Aecemable ERA 2ndl20 1 7 0512 3.11 7 MRAll-26 Flier t!Cllfll t er l.kan l 1111-2J8 70.7 12A. 46.3-1 00 ~e ERA 2ndl2J0 1 7 0512Jl 1 7 MRAD-26 Flier pCl'Flter U!an ll n-238 n.1 72A. 46.4-fOO Aecemallle ERA 2ndl20 1 7 05123.117 MRAD-26 Flier IJCl,'fller Uranlllm-T olal 1 54 t49 82.S-Xll Aecerbbie EM 2ndl2J0 1 7 0512Jl17 MRAD-26 Flier nr.:l;'faer Uranlllm-T olal 1 45 t49 B.2..S.-2Zl Acceptit,le ERA 2rxll20 1 7 0512Jl17 MRAD-26 Flier pCl'FUer UranlUm-T olal 1 59..S. t49 82.5,-227 Acceotatlle Uranlllm-T C!Cal ERA 2ndl2J017 OS/2Jl 1 7 MRAD-26 fDer IK!i'flllEr {ffli366) 230 217 1J9 -306 Acceptit,le Uranlllm-T olal ERA 2!ldl10 1 7 0512Jl17 MR/\0-26 Fil er un, 1'1 111:r {tnil6$l 212 21 7 1 l9-JD6 ~alJIE! Uranlllm-T olal ERA 2ndl20 1 7 0512Jl17 MRAD-26 FD er , rnlFl l ler "'1as6 1 23 1 217 1J9-306 --E! ERA 2lldi20 1 7 051231 1 7 MRA0-26 -"""'"""" 2ll'!C'65 1t 60 984 705-1 360 """""'.,.,.e ERA 2ndl'l0 1 7 05'23.f17 MRAD-26 filer* nC I JR b>r GRl6&Alcl'la 112 85;5 28.6-fJJ Aeceotmle ERA 2rv:1i20 1 7 05123.117 MRA0-26 Aler --* GRl6&1 B e tJ 54-9 45.2 2B.6-65.9 ...._..:vve EFIA 211dm}1 7 05123117 MRAD-26 Wate r ""'I L Ametllctum:-24 1 1 50 1 40 90-1 68* ,........,.,..,.e ER.a. 2m:lfl0 1 7 0512Jl17 MRAD-26 Wate r DCl/1 cewm-1 34 2300 25 1 0 1 840-2680 Aecent>ihle EFIA 2ootll017 05123117 MRAD-26 Wate r DCI/L Ce<611:Jm-137 1 480 1 400 11 90-1 6811 ACcevt:mle ERA 2ndl20 1 7 0512Jl17 MRA0-26 Wate r DCI/L cma lt-60 2S70 2540 2210-2971) Aece01al>le ERA 2n,:11210 1 7 0512Jl17 MRA0-26 Wate r pC L'L too-55 9Z3 984 5137 -1 340 Accefltm!E! EFIA 2oot2017 05123117 MRA0-26 Wate r DCI/L Mana.lllE!6e-54 <6.J6 <<1 00 0.00-100 AmP<lt>Ne ERA 2rv:1i20 1 7 OS/2Jl17 MRAD-26 Wate r pCl1l. P l lllllnlllm-238 1 00 1 28 94.7 -1 5'9 Acceobl>ie ERA 2fl1r20 1 7 05/2Jl17 MRA0-26 wate r pCI/L P l ulcnlllm-2J9 73.J 85.3 66.6-1 03 Aml>Dtltlle ERA 2111112'0 1 7 OS/2Jl17 MRAD-26 wate r pCl ll saooalm-'3D 685 7 1 4 465-944 Aecemallle EFIA 2111112'017 05123117 MRA0-26 W:ate r pCI/L l.kan l-2J4 82..t 90,,} 67.8-11 6 Aoceolable EFIA 2nclf2I0 1 7 0512Jl 1 7 MRAD-26 Wate r DCI/L Lnn l um-2J4 92 90.J 67.4-116 ~E! EFIA 2ndfl0 1 7 OS/2Jl17 MRAD-26 Wate r DCl/1 I..An l mTt-2J4 81.t 9!U 67.8-116 Acceobl>ie EFIA 2nclt'2017 0512Jl17 MRAD--26 wate r r>r.1 11 I.Jran l~ 86.7 8!1.S 68.2 -110 AeceDtJllle EFIA 2nctQ0 1 7 0512Jl17 MRAD-26 Wate r DCIJL lk.ln l mn-2J8 !14.1 89;5 662-110 Aooeptable EFIA 2111112'0 1 7 0512Jl17 MRA0-26 Wate r oCIJL LR!l f-2JB 9B 89;5 6B.2-no AeceotalllE! ERA 200!2017 0512Jl 1 7 MRAD-26 Wate r DCIIL Uranlllm-T otal 1 8 1 1 114 135-2J.'3 AID>otalJle ERA 2r!d!'l0 1 7 0512Jl17 MRA0-'26 Wate r D!".1 11 Uranlllm-T o&al 1 7J 1134 tJS-238 Accent>illle ERA 2oo/20 1 7 05123117 MRA0-26 W<lte r DCIIL Uranlllm-T otal 1 80 1 114 135-238 ACceolallle ERA 2oot20 1 7 DS/2Jl17 MRA0-26 W.ite r DCI IL U r.nlllm-Total 1 85 184 135-23!1 ~e UliW'IIUffl-T otal ERA 2rxla0 1 7 0512Jl 1 7 MRAD-26 wate r !lllfl {mai,r;l 270 263 2 1 4 -324 Aeceolable Uranlllm-T ol.al ERA 2rxla0 1 7 05123117 MRA0-26 wate r lfQll. {mai,r;) 260 263 2 1 4 -J24 ~e UliW'llllm-T ol.al ERA 2r!d!'l0 1 7 0512Jl17 MRAD-26 Wate r unfl.. "'1as6 l 252 2611 2 1 4-3.24 ~E! Uranlllm-T olal ERA 2r!d!'l017 0512Jl17 MRA0-26 Wate r u nit l m.-1 276 263 2 1 4-3.24 A<n>nbble ERA 2rxla017 05123117 MRAD-26 Wate r DCI/L 2J~ 2160 1 960 1 630-2470 Acceotable ERA 2rxla0 1 7 05123117 MRAD-26 Wate r !lOIL Gnt65Allltla 1 25 89.S 3 1.4-139 """""'able Page 11 of 1 2 Page I 56 APPENDIX C 2017 AREOR til =i I Laboratories 11 a 111,, r Ct 1h11 m.L Ci~up oer com ...... t ce1111aMe PT Gllatlr l ....... ...... ...... GEL ......, ...... y-.,. ..... -Ulllt ~,--RIIID E...._ ERA 2ndl2017 05123117 MRA0-26 Wa!E!r r>r.1 11 Gro&lil!etl 59..6 61 34..9-9DA AttPnt>Ne 1 JOOO -ERA 2rx!tl0 1 7 D512Jf 1 7 MRAD-26 Wate r oCIJl Tlltl .... 1 890D 1 9400 21700 lla:e<!bbie ERA 2ndt2.0 1 7 DSIJOf17 RA0-1 D9 Wate r DO il Gm65Allllla 79.7 75 3'J!.5 -!123 Acc:e!Jtat-.. ERA 2nd/20 1 7 OSIJOf17 RAD-1 119 Wate r pCI/L GIOl6 Alpha 72..9 75 39.:S*-92 .. 3 Accellfallle ERA 2nd/2017 OSIJOf17 RAD-1 D9 Wate r Da ll Gro55 Alpha 72..9 75 39.:S-92.'3 Ac:cellfallle Pa g e 1 2 of12 Page I 57 APPENDIX C 1c1::jl Laboratories uc nb r ' 118 OH G f] p TABLE 2 GE L QUARTERLY INTERLABORATORY COMPARISON July through September 2017 Page 6 of 9 G EL 2017 AREOR oet com " Page I 58 A PP ENDIX C 2017 ARE O R ti1511 laboratories Lt C a ,r.,.nb,r ol l he 6tl Gr:11 1 p oeicom lllparf Ace_.

• PT Gllll1ill" I .........

...... ...... .....,._, G B. ic-......, PnNldlr Ylilr DIii ....... ..... llnlt ...... v .. ..... RIMo EZA 2nd/2017 llll/02t17 E 11 UJ C.Jftllda;e IIC I I Odll'll!-13 1 8.65E+o1 8A6 E-+01 1.D2 At!a>otlble EZA 2l"Kll2Df7 llll.'ll2!1 7 E 11 874 Mil OCl/1 Slmnt.lum-a!l 8.88Et0 1 9.26 E t01 0.!16 Al:cel>lable EZA 2ndJ20f7 IIIW2/1 7 E11874 MU .,,,.,, stmnllum-'JO 9.!56E*+OO 1.3'5 E+Of 0.71 -le EZA 21'K1121lf7 06!02/1 7 E11875 Mll nr.111 CEl1ll'l1.-14 1 1.62Et02 1$1E+02 1.D7 -le EZA 2ncll2D t 7 06Jll2/1 7 E U.875 MU DCl'L CObalt-58 1.53E-+02 1.55 E+02 0.98 At!<,pmable EZA 2nd/2017 tJB.1 D2f 1 7' E 11 875 Mll nclll CObalt-60 2.DTE+D2 1.9t E+D2 U>II Al:cel>lable EZA 2nd/2D.f7 OIW2/1 7 E 11 875 Mil OClll Clvorn l ll'll-5 1 J.65E+02 J.1 5 E t02 1.16 Accep!aDle EZA 2nd/20 1 7 08/ll21 1 7 E 11 875 MU nN/1 Ce6bn-1 34 1.711Et02 1.88 E+D2 0.!112 -le EZA 2ndl20 t 7 06Jll2/17 E 11 875 MU pCl'l Ce61Um-1 J7 1.5TE+D2 1.511J E+02 1.()5 Atts>otlble EZA 2nd/20 f 7 tJB.ID21 1 7 E 11 875 Ma DCIIL lrOll-59 1.28E~2 1.1S E+02 1.11 Acceotlble EZA 2nd121lf7 llll/02t\1 E 11 875 Mil pClll I Odll'll!-1 3 1 9 . .9Jct0 1 9.36 E t01 1.06 Aa:ep1allle EZA 2nd/20 f 7 06/ll2f17 E 11 875 MU nnll M~S4 1.SSE-+02 1.12 E*+D2 1.1 4 Al'N'Diable EZA 2ncl/2D f 7 06.'1l2/1 7 E 11 875 Mll nr.111 ZI00-65 2.1 8E-t02 2.B4 E+02 1.D7 A.........hhle EZA 2n11.i 211 1 1 tJB.I021 1 7 E1 1 876 Water DCl'L Cl:llirn-1 4 1 2.09 E t02 1.99 E+02 1.05 Aoo!'ot.lble EZA 2ndl2D 1 7 OB.'D2t 1 7 E 11 876 water OCl/1 Cooalt-58 2.11Et02 2.04 E+02 1.04 l\cl:eptlble EZA 2nd/2Df7 IIIW2/17 E 118 76 W'ikr .,,,.,, CObalt-60 2.S7Et02 2.S0 E+02 1.IIJ ~able EZA 2nd/20f7 OB.'D21 1 7 E 11 876 Waler OClll CIVorn l ll'l1-5 1 4.4 1 E-+02 U JE*+02 1.D7 A.-ntll:,ie EZA 2nd121117 OBJll2/1 7 E 11 876 Waler OClll Ce6bn-134 2.J8E-t02 2.47 E+02 0.96 Acceoiable EZA 2nd/20f7 06/ll2f 1 7 E 11 876 Wilter OClll Ce61um-137 2.20E+02 1.97E+D2 1.1 2 Aooeotlble EZA 2nd/21lf7 OIW2/1 7 E 11 876 Water Da!\. lroll-69 t.64E+m 1.5 1.E*+02 1.1 19 -le EZA 2ndl2Df7 08JD:2/1 7 E 11 3 , 76 water OClll I Odll'll!-13 1 B.69Et0 1 8.1 2 E+0 1 1.D7 """""tlble EZA 2nd/20f7 06J02/17 E 11 876 Waler DCl.'t Man-2.43Et02 2.25 E+D2 1.D8 Acceotlble EZA 2ndl2Df7 OBI02/1 7 E 11 876 Willer DCl'L Zln!>65 2.95E+D2 2.67E+D2 1.1 0 """""tlble ERA Jnl/ 20 17 Ol!J28/1 7 RAO-t iO Water OClll Bar1Um-t 33 68.8 66.J 55-2

• 7'2.9 Aoceotlble ERA Jnl 1 20 1 7 tJB.128/ 1 7 R,tO. , 10 water nNll Ce61Um-134 211.7 24.4 1 8.7-27.2 -table ERA Jrtl/ 20 1 7 06.!28/1 7 R,11). '1 0 Waler nr.111 ceam-tJ7 51.7 5 1.6 46.4-59.6 .. ~le ERA 3nl 1 20 1 7 OB.!26/1 7 R,11). , 10 water nr.111 cooalt-60 97 lla.6 79.7 -99.8 A.c<,eoiable ERA Jnl/20 17 0111281 1 7 RA0-1 10 Wilb!r OClll Zl:lc-65 39.7 32.7 27.:)-4 1.6 Aooeo1able ERA Jnl/ 2017 tJB.128/1 7 IW>-1 10 Wate r nr.111 Grtl66 Al""" ~.J 25.7 1 3.0-34.t """""tlble ERA Jnl/ 2017 06.!28/1 7 RA0-11 0 Waler ....... Grtl66AI""-" 3 1.9 25.7 1 3.0-34.1 """""tlble ERA Jnl 1 2017 OB.!'2!1/1 7 R,tl). ,1 0 Waier DCl/1. G"'" Be ta 511 .. 4 63 113.5-69;6 Acceotable ERA Jnl l 20 1 7 tJB.126/1 7 fWl-1 10 water DCI.'\. Radlll'l1-226 1.6 1.29 t.07
• 1.95 """"°'""le ERA 3nl 1 20 1 7 Ol!J28/1 7 RAO-11 0 pCl'l Rildlll'l1-226 1.2 1 1.29 1.0 7
• U IS Accl>oiable E RA Jnl / .20 1 7 06J'2af17 R,t0.1 10 w~ ...,...l RilCl1lrl1*228 6.4.9 5.66 , l.45-7.A7 ,.,,,,.,,;:,;,le ERA J nl / 20 1 7 08/28/17 R,tll-11 0 Water DCl/1. R.dmn-228 5.59 5.66 J.45-7.47 .ADceptable ERA Jnl l 20 1 7 06/28/1 7 RA0-1 10 water DCl/1._ uran i um lNatl 65 66.7 54.J-73.9 """""'tlble ERA J nl 1 20 1 7 OBml/1 7 R,,0-1 10 water DCI.'\. uran i um (Nat) 616.2 66.7 54.3-73.9 Acceotlble P age 7 o f 9 Ge Lu.'bo r 11ti om:u 1~ "O!l>llnf a, 1.~n,;1;1!11*111 31")~-Pl\ICl'l'IIJ'

, M ** stl ,!'71 r .. , ...... , ,.1'1 "'--'"" Page I 59 APPENDIX C 2017 AREOR mil La b orato r ies t 1 am r,b IO'I IISGHGr) (I -*--,--o e 1 c om -..... Ac~--* PT QMIWI -..... .... ...,., GEL "-....., PnMcllr .,.. om ..... -VIiia .. Ell I t-cm U"ariUTI (.Nit) ERA 3nH 20 1 7 08/2af 1 7 RA0-11 0 Waller oo/1. llla65 97 98.1 79.8 -1 0 9 -le-'lk.iri (tfat) ERA 3rd/ 20 1 7 OW28117 RA0-!1 0 Water IJQ/L llla65 104.7 98.1 79.8-1 0 9 AollPD!atJle-ERA 3 nf/ 20 1 7 08.'281 1 7 ll.lO-*10 W:Rr l'lCl'L Tnft:Jm 5 1 20 :506 0 4340-5570 .. ~le-ERA J nf l 20 1 7 06f2a/17 RAD-*10 Wat.."!" nrll1 T""'*m 4620 5060 4340-55 70 A-le-ERA 3111 1 2017 081281 1 7 RA0-*10 Water l'lCl'I stror6m-.89 Z9.9 26.4 1 8A-32.9 .. """"""le-ERA 3111/ 2017 06l23/1 7 RA0-11 0 water DCIIL SlrnnilllRH!9 26.2 26.4 t a4-J2.9 ,.,,,_;able-ERA 3111 1 2017 OBnll/1 7 R,fl>-1 10 Water DCl!I Stronllum-'9D 31'.8 3 6 26.4 -4 1.5 Aeclel>1at>le-ERA 3 111 , 1 2017 08.IZ3/1 7 RAD-*10 waw-nl'II I sfronl!Um-90 34 36 26.4-4 1.5 ,.............,le-ERA 3 nf I 2017 08.IZ3t1"1 ll.lO-i 10 ~V:Rr pCl'L l o llne--1 3 1 28 25 . .5 2.1.2-JD.1 """""'1:anle-Nol ERA Jnl/ 2017 08n!ll 1 7 RA0-1 10 'Nater l'lCl'I I Ollne--1 3 1 33 25.5 2 1.2-JD.1 Aeclel>1at>ie-P age 8 of9 Gl!l Page 160 APPENDIX C M=II LaboratoriesL Lc ~IHI I I The GCL Gro11p C TABLE2 GEL QUARTERLY INTERlABORA TORY COMPAR I SON Octoberthrou December 2017 Page6of 12 2017 AREOR gel com Page 161 APPENDIX C 2017 AREOR ta::11 Labo r a t orieSL LC 1 rnl, rat T e GCL G r 11p ,~ gel com -----Ripest AicceptiaMae PT QmltN" Rl!ceMd s-.-GEL Ralg!I Prvwimr I Yur (ale _.......,. _. Ural _, Nudidl! YaR Yilllle Ralio Evaallon MAP EP 4lh/2017 1 2101/17 MAPEP-1 7-MaW37 WilAK Bq/l Cesiu m-1 34 10.50 1 1.5 8..1-1 5.0 ~table MAPEP -'khl2017 1 2/0 1/17 MAPEP-1 7-MaW37 Waler Bq/1.. Cesiu m-1 37 1 6.800 1 6.3 t1.2"2l.2 Acceotable MAPEP 4lh.l2017 1 21011t7 MAPEP-17-MaW37 w.-.1.-Rn/1 Ooba l t-57 1 2. l 1 2.1 ~15.7 ~ble MAPEP 4th.'20 1 7 1 210 1fl 7 MAPEP-1 7-MaW37 Wat.<< Boll Cd:>aJl..&J I D.BOO 1 0.7 7.5-13.9 Acoeotable MAPEP 4llv20 1 7 1 2/0 11 17 MAPEP-1 7-MaW37 Waler Bail H 250 258 1 8 1--335 Acceotable MAPEP 4lw.20 1 7 1 2/0 11 17 MAPEP-1 7-MaW37 WOO!'/ Ra.'L l rcn-65 2D.1 19.4 13.6-25..2 AcoPril.c1ble t.lAPEP 44W2.017 1 2J0 111 7 MAPEP-1 7-MaW37 WatB Ball EA 1 5.5 1 4.9 10.4-1 9.4 Acoeolahle -Fa l sePos MAPEP 41h/2017 1 210 1/1 7 MAPEP-1 7-MaW37 Wal£!r-Ba/L Nickele-63 0.764 D Test Acoeotable MAPEP 4h/2.0 1 7 1 2/0 1/17 MAPEP-1 7-MaW37 w-Ba,'\.. Plullorium-238 0.528 0.60 0.422-0.784 Acceptable MAPEP 41h/20 1 7 1 2/0 1/1 7 MAPEP-1 7-MaW37 W:,a,r Ba.'L Plrtonium-23111240 D.654 D.78 1 0.547-1.015 Acceotable FalsePos MAPEP 4lhf.2017 1 2J0 1/l 7 MAPEP-17-MaW37 W:t.!-~ Rall Potassitsn-40 -12 D Te51 Accerita.lw> MAPEP 4lh/'2017 1 2.'0 111 7 MAPEP-1 7-MaW37 w~ Bail Racium-226 o.n4 0.86 0.60 1-1. 1t5 Acceotable MAPEP 4lhr./.0 1 7 1 2/0 1117 MAPEP-1 7-MaW37 Waler Rall Slrontiwn-90 7.04 8 5.44-10.1 0 ~ble MAPEP 4lh/'20 1 7 1 210 1/17 MAPEP-17-MaW37 WOO!'/ Bq/L T echnetium-00 6.4 1 6.73 4.7 1-R75 Acceo1'3ble MAPEP 4lh/21l17 1 210tf17 MAPEP-1 7-MaW37 Wi141!T Ball.. Uran i um-234/233 1.09 L ot 0.71-1.31' ~e MAPEP 4ltv20 1 7 1 210l/t7 MAPEP-1 7-MaW37 w .... ..-Anll Ura n ium-238 t.140 1.040 D..73-1.35 ~-.ble MAPEP 4lhf.20 1 7 1 2Jll 1/17 MAPEP-1 7-MaW37 w~ Bq/L Zino-65 1 7.3 1 5.5 10.9 Aoaeotable MAPEP 4llv'20 1 7 1 2J0 1f1 7 MAPEP-17-XaW37 Alk. Wats5 Ball.. l odine-1 29 2.590 2.3 1 0 1.62-3..00 ~-able 0.0355-MAPEP 4h'20 17 1 210 1'17 MAPEP-1 7-RdF37 Filter *-'---1-Ura n ium-235 0.0521 0.0507 0.065(1 MAPEP 4llv'20 1 7 1 2/0 1(17 MAPEP-1 7-RdF37 Filter ,.-,1<.,vnnle Uranium-238 7.8 7.0 4.90-9.1 0 Acceotable MAPEP 41h/20 1 7 1 2/01/17 MAPEP-17-RdF37 Filter Uranium-T ota l 7.04 7.05 4.94-9.17 Acceotable D.0458-MAPEP 4th/20 1 7 1 2/0 111 7 MAPEP-17-RdF37 Fill...-Bafsa~e Americium-24 1 0.053300 0 0.0796 ~ble MAPEP 44h/20 17 1 2101f\7 MAPEP-1 7-RdF37 Fi l ter Bo'sarmle Cesiu m-1 34 1.0300 1.00 0.7-1.30 Al>oPotable MAPEP 441\12.0 1 7 1 2J01f17 MAPEP-1 7-RdF37 fi l!Er B<l'samcile Cesiu m-1 37 0.88 0.82 0.57-1.07 ~otable F: l se Pas MAPEP 4til'.2.0 1 7 1 2/0 1(17 MAPEP-1 7-RdF37 Fi l ter Balsamole Cobalt-57 0.01 0.00 T est ~ble MAPEP 4ih/'2017 1 210 1'1 7 MAPEP-1 7-RdF37 Fi l ter Bdsample Cd>alt-00 0.75 0.68 O a 43-0.88 MAPEP 4ttv20 1 7 1 2/0 1(17 MAPEP-1 7-RdF37 Filler B<l'samcile M-CA 1.48 1.30 0.9 1-1.69 A,,r,,,.nL-ahle -0.0209-MAPEP 4lh/20 1 7 1 2/0l/17 MAPEP-1 7-Rdf'37 Filler Bq/sarr,ple Plutonitm-238 D.0257 0Jl298 0.0387 0.0328-MAPEP 4hr.2017 1 2/0 1(17 MAPEP-17-RdF37 Filla' BQ/sample PkltDnium-2391240 0.0408 0.0468 0.0608 MAPEP 4lhr.1.017 1 2/0 1/1 7 MAPEP-1 7-RdF37 Fi l ter Anki>mnle Strontiwn-90 0.608 D.80 1 0.56 1-1.04 1 ~ble MAPEP -4ih'20 1 7 1 2/0 111 7 MAPEP-1 7-RdF37 Fi l let" Bdsamale Uran i um-2341233 0.086 D.084 0.059-0.1 09 Acceolable MAPEP 4lnl20 1 7 1 2/0 1'1 7 MAPEP-1 7-RdF37 Fi l t er Bo'sarmle Uranium-23S D.D93 0.087 0.06 1-0.1 13 ~ble MAPEP 4fu/'2017 1 2/0 1/17 MAPEP-1 7-RdF37 Fil!B-Anki>mnle Zino-65 1.2500 1.08 0.~1.40 """""1l;,ble MAP EP 4thl2017 1 2101(17 MAPEP-1 7-RdV37 Veiietmion Balsamole Americium-24 '1 D.D80 D.Dn D.054-{). I Acceolable MAP EP 4thl2D 1 7 1 2/0t/17 MAPEP-1 7-RdV37 Veiiet:mon Ba/sample C-esium-'1 34 2.30 2.32 1.62-3.02 Acceptable Fa l se Pas MAPEP 4ft/2017 1 2/01/17 MAPEP-'1 7-Rd\137 Vegetation BqJsample Cesium-1 37 0.0 1 9 1 0.00 Test ~otable MAPEP 4lh/2017 1 2/0 1/17 MAPEP-17-Rd\137 Vegetation B""'-"mnle Cobalt-57 2.92 2.80 2.0-3.6 A,,r,,,.nL-able Page 8 of 12 G El. Laboratxirit:s I.L C Page 1 62 APPENDIX C 2017 AREOR fiJ a I Laboratories u C 0 w il ier o f The GCL G r oup ic POE/,1 ! , 12 ,l4Ul:ii!Va~~ C oef com -,~ Report Acceptaloe PT Qr.a.irtiH "-iwd S-.ple GEL Rangel Prowidl!r I Yur ewe -......... .. Unit _, Nuclide Villue --Rilllio Ewluaon MAP EP 4lh/20 1 7 1 2/0 1(17 MAP EP-1 7-RdV37 Vegela!ion Bctsamcle Qibalt-60 2-24 2..07 1.45-2.69 Accep1able MAP EP 4fu/'20 1 7 1 2/01117 MAPEP-1 7-Rd\137 Veaeialion Bo'samcle Manaanese-54 2.78 2.62 1.83-3.4 1 Acceotable MAP EP 4fu/'20 1 7 1 2/01'17 MAP EP-'1 7 -Rd\/37 Ve,o~cn Bcrsamrile PlulDniu nr 238 0.0762 0.0830 0.058-0. 1 08 ~ble MAP EP 4llv'2017 1 2/01'17 MAP EP-17-Rdl/37 Ve,oetalion Bal samrne Pluton i tm-239'240 0.104 0.108 0.076-0.140 ~bl e MAP EP 4thf2!l 1 7 1 2/01 1 17 MAP EP-1 7-Rt:flf37 Veae4ation 8Qlsample Strontiun-00 0.960 1.23 0.86-1.6 Acceptable M AP EP 41h1'2D 1 7 1 2/0 11 17 MAP EP-1 7-Rdl/37 Vea.elation Rnl.s,-n ol e Uran iu nr234/233

0. 162 ll.159 0.1 11-0.207 Accent.-.hle M AP EP 4ttw2017 1 2/D11t7 MAP EP-17-Rd\137 Vesi.ebtion Bokam ol e Uran i tm-238 0. 166 0.163 0.1 14-0..212 Aooelltabl e MAP EP *4th/20 1 7 1 2/0tf17 MAP EP-1 7-Rd\137 Vegetation Balsarmle Zine>-65 5.Q3 5.37 3.~.88 Acceota bl e ERA 4lhl'20 1 7 1 tll7/17 M RA0-27 Soil nC'.i olin Actina.r nr 228 1 200 1 2.40 785-1 720 ~e ERA 4tW20 1 7 1 t/17117 M RA0-27 Soi l oOiilto Americi u nr2 4 1 1 1 80 1 1 40 667-'1 480 ~e ERA 4lh/20'17 1 tft7117 MRAD-27 So il oCiillo B i srruth-2 1 2 1 600 1 2.40 330 -1 820 Acceotable ERA 4IW20 1 7 1 1/17/17 MRA0-27 Soi l nC'i olin B i srruth-2 1 4 1 460 1 890 1 i40-2721J IW:lcenlahle ERA 4lhl20 1 7 1 1117/17 M RAD-27 Soi l nl'.i olin Cesiu nr 1 34 5770 6320 4 1 30-7590 """"""'>>ble ERA 4tw.1.0 1 7 1 11 1 7/17 MRAD-27 Sor l oa&o Cesiu nr 1 37 3Q40 3830 2930-4 930 Acceolllble ERA 4lhl2017 1 t/171\7 MRAD-27 So il rC.ilkn Col>a lt-00 4 1 10 4 1 30 2.7QO -5690 Aooenl.i>hle ERA 4lht2.0 1 7 1 1117117 MRA0-27 Soi l cCil1ta Lead~1 2 1 270 1 240 8 1 2 -1 730 Aooeo1able ERA 4lh/'2017 1 1 117117 MRAD-27 Soi l oC.ilka Lead-2 1 4 1 7:m 1 880 1 160-2850 Acceptable ERA 4lh/20 1 7 1 1/17 11 7 M RAD-27 Soi l r,{'j ll,n Lt.~anese-54

<29.2 <1 000 <1000 Accenb bl e ERA 4lh/'20 1 7 1 1117/17 M RAD-27 Soi l cCi/ka P l utoniu nr 238 508 6 1 5 370-849 ~-ble ERA 4ful20 1 7 1 tll7/17 MRAD-27 Soi l pCi/kg P l u!Dniu nr 238 578 506 33 1 -600 Acceolable 7740-ERA *4Wl0 1 7 1 t/17 11 7 M RAD-27 Soil cCi/ka Potassium-40 1 0000 1 0600 t421JO Accenh bl e ERA 4llv20 1 7 1 1117117 M RA0-27 Soi l nCi/lcn Strontitm-80 2530 3460 1'120-5470 Acceobble ERA 4th/20 1 7 1 11 1 7 1 17 M RA0-27 Soi l oCilka Thariu nr 234 4 1 60 3690 1 1 70-6840 Acoent.,ble ERA 4lh.l20 1 7 1 11 1 7117 MRAD-27 Soil oC i/1<<> Uranir..m-234 4310 37:m 2270-4770 ...,,.,.._hie ERA 4W20 1 7 1 1117117 M RAD-27 Soi l oCilka Uran i tm-234 3350 3720 2270-4770 AcceDlable ERA 4lh/'20 1 7 1 t/1 7117 MRAD-27 Soil .Cilka Ura n i tm-234 3400 3720 2270-4 770 IW:lce r>L-.ble ERA '4d1(21)17 1 1117/17 MRAD-27 Soil pCilka Uran i r..m-238 3590 3600 2200-4680 Acceolable ERA 4!h/2017 1 1117117 M RAD-27 Soil DCilka Uran i tm-238 4380 3690 2280-4680 Acceotable ERA 4lnl2017 1 1117117 M RAD-27 Soil cCil1to Uran i tm-238 3260 3600 2280-4680 ....,,.,.._ble 4 1 10-ERA 4fu/'20 1 7 1 1117117 M RA0-27 Soi l DCilka Urarwm-T otal 77'32 7580 10000 Accecta bl.e 4110-ERA 4th/'20 1 7 1 1/17117 MRA0-27 Sor l pOilkg Urana.r nr Tota l 7 1 00 7580 10000 Acceolable 4 1 10-ERA 4th/20 1 7 1 t/17117 M RA0-27 Soi l pCifka Uraniu nr T ota l 7780 7580 10000 AcoenL-,.hle 4 11 0-ERA 4th/2017 1 1/17117 MRA0-27 Soi l oCilka Uraniunr T ota l 8090 7580 10000 Ar,r.o,,ntn hl e Uranium-T ota l 6 1 20-ERA 4ful2017 1 1 117117 MRAD-27 Soil ua/ka {massl 1 2 1 00 1 1100 1 4000 ~ble U r ari u nr T ota l 6 1 20-ERA 41.hl'20 1 7 1 1/17117 M RA0-27 Soi l ua/ka Crnass l 1 D800 11 1 00 14000 AcoenL-,.ble U r arium-T ota l 6 1 20-ERA 4<h/2.0 1 7 1 1117117 M RA0-27 Sot l ua/ka (mas s) 1 2200 11 1 00 14000 Accecta bl e U r.num: T ota l 6 1 20-ERA 4!hl20 1 7 1 trt7117 M RAD-27 So il ua/ka (m ass) 9770 11 1 00 14000 AcoeDla bl e Page9of 12 Page I 63 APPENDIX C 2017 AREOR ra a. Laboratories L L

• e11 11~, a t T e GCL Group le ael com -,_ -Aepart A&:cept.aoCr PT Qu;wter-Receiwd s-.-GEL Kr-. Rmgel Prowider /Ye., Ila _......,_

Meda Int _, Nuclicil! Y.-.e Wllue ftalio Ewllulian ERA 4th/2017 1 t/17/17 MRA0-27 Soil DCilk<J Zinc-05 7380 6660 5300-8850 ~e ERA 4!W2.017 1 1/17117 MRA0-27 Ve<!ellibcln pCi/kg Ameriaum.-241 68 1 670 410-891 Acoeotable ERA 4ihr.2017 1 1117/17 MRA0-27 Ve:gelation DCi/ka Cesium-134 1 530 1 670 1 D70-2170 AcceDtable ERA 4m'2017 1 1117/1 7 MRA0-27 Veoebtion DCi/kg Cesi um-1 37 1 800 1 840 1 330-2560 AcceDtable ERA -4lh/20 1 7 1 1117117 MRAD-27 Veoelation nCillin Cobalt-00 2320 2180 1!500-3050 Acceolable ERA 4IW2017 1 1'17/17 MRA0-27 Veflelalion oCilka Cln!m.-244 2380 2790 1370-4350 ~e ERA 4llv2017 11117/1 7 MRA0-27 Ve:gebiion oCi/ka t,tanganese-64 <36.1 <!00 <300 Acoeotable ERA 4th/2017 1 t/t71 1 7 MRAD-27 Veo e taticn nC~ PlulD<wm-238 3340 4 180 2 400-5720 A,y,p,,t.~ble ERA 4th/2017 1 1117 11 7 MRA0-27 Veoebtion nCi/1m PlutonaJm,.239 950 1 060 651 -1460 22300-ERA 4thl2017 1111 711 7 MRA0-27 Ve:getation oCi/ka Potassii..m-40 34000 30000 43400 Acoeotable ERA 4!W20 17 1 11171 1 7 MRA0-27 Veo.eution DCilka Slronti!SD-90 2580 2650 15 1 0-3510 Accent.~ble ERA 4IW20 1 7 1 1/17/17 MRA0-27 \h>oebtion nCi/ka Urani!SD-234 985 005 654-1280 ~e ERA 4th/20 17 1 1117/17 MRA0-27 Ve:getation nCillia Urani!SD-234 1 1 00 005 654-1280 AcceDtable ERA 4th/20 1 7 1 1/17117 MRA0-27 Vegelation , pCilkg Urani!SD-238 1 040 Ql87 650-1250 Acceptable ERA 4lhl20 1 7 1 1/17/17 MRA0-27 Vefletalian oCilka Urani!SD-238 821 087 650-1250 Accenmhje ERA 4int20 1 7 1ll17/17 MRA0-27 Veaetation !]Cilka Urarwum-T Ola! 2320 2030 1 380-2530 Acceotable ERA 4lhr.lll 1 7 1 1117117 MRAD-27 Vegelation DCi/ka U rarwum-Total 1 845 2030 1 380-2530 Acceotable ERA 4lh/2017 1 1/1 7/17 MRA0-27 Vea.elation DCilka Urarwu m-Tol.llJ 2300 2030 1380-2530 AN>i>nt.~hle Uranium-Total ERA 4lh'2017 11/17117 MRA0-27 Veoetalion uru'lm (mass) 3200 2980 2000-3780 Aco>rit:,,ble Ur anium-Total ERA 4lhl20 1 7 11/1 7117 MRA0-27 Ve:iieblion uru'lm (mass) 2460 2980 2000-3780 Acceotable Uranium-T otaJ ERA 4th/2017 11/1 7117 MRAD-27 Vegeb1ion ualka (mas s) 3460 2980 2000-3780 Acceolable ERA 4th/2017 I \117/17 MRA0-27 Vegetalion cCil1la Zinc-05 1 670 1 400 1 0 1 0-1 g70 Acceotable ERA 4IW20 1 7 I 1/t7117 MRA0-27 Filler DCi/Fi l ter Americium-241 1 5.4 14.0 9.18-20-2 A---**-Le ERA 4!W20 1 7 1 1/17117 MRA0-27 Filter DCi/Fi l ter Cesi u m-134 1 4 1 0 1 440 9 1 6-1 700 l\cceombje ERA 4th/20 1 7 1 1/17/1 7 MRAD-27 Filter nr.i/Fi l ter Cesium-137 1 0l0 954 7 1 7-1 250 A e ERA 4W2.0 1 7 1 1117/17 MRA0-27 Filter DCi/Fi l ter Cd>all-60 296 27 1 2 10-339 Aooeotable ERA 4lhl20 1 7 1 1/17/17 MRAD-27 Filter DCi/Hter 1 010 1 080 335 -2110 Acceotable ERA 4th/2017 1 11 1 7/17 MRA0-27 Fill<< cQ'Filter Uvv,anese-64 <3.1 8 <50.0 <50.0 Acceotable ERA -4lh/20 1 7 1 1/17/17 MRA0-27 Filb!r DCi/F d ter Plutonium-238 61.8 63.9 43.8-84.0 Accentable ERA 4lhl20 1 7 1 1117/17 MRA0-27 Filler pCi/R l ter Plutonium-239 40.2 44.4 32.1 -58.0 ,. __ ,....,e ERA 4!W2017 1 1/17/1 7 MRA0-27 Filter nl'j/1::jfter Slrcntium-00 1 1 5 121 59.1-18 1 A,,no.nt...,ble ERA 41h/'20 1 7 1 1/t7117 MRAD-27 Filb!t' DCi/Fi l ter Urnnium-234 42.8 41.5 25]-62.6 Accentable ERA 4llv20 1 7 1 1117/17 MRAD-27 Filb!t' DCi/F d ter Urnni!SD-234 38.5 41.5 25.7 -62.6 A--*-1..le ERA 4W2.0 1 7 1 1/17/17 MRAD-27 Filter DCi/Fi l t er Uranium-238 41.t 41.2 26.6-57.0 Acceolable ERA 4ih/20 1 7 1 1/17117 MRA0-27 Filter DO/Fi l ter Ul'anium-238 37_5 41.2 26.6-57.0 Acceotable ERA 4ih/'20 1 7 1 1/17/1 7 MRA0-27 Filter nCi/Fi l ter Uraniu m Tota l 82 84.6 46.8 -129 Accentahle ERA 4th/2017 1 t/17/17 MRAD-27 Fill<< i,CiJFilter Urarwum-Tobl 86.7 84.6 46.8 -129 Acc.>otable ERA 4th.l2017 1 1117/1 7 MRAD-27 Fil!N DCi/Fi l ter Urarwum-Total 83 84.6 4 6.8-129 A=eol.able ERA 4lh/20 1 7 11/1 7/17 MRAD-27 Filb!r uafFilter lhn_.TOlll ltln oH l 129 1 23 78.7-1 73 Acceotabl.e Page 10 of 12 Page 164 APPENDI X C =II Laboratories L w .1 , ~1111:i.:1 ,ii T e GCL Grou p ,,; --ll!palt PT Aeceiwd PnMder /YNtT Date _.......,. lll!cN Unit ERA 4lh/2017 1 t/17 1 17 MRAD-27 Fi ll.et' µQffi l ter ERA 4lhl'20 1 7 1 l/17fl7 MRAD-27 Fill.E!t' uatfi l ler ERA 4thl'20 1 7 1 l/t7 (17 MRAD-27 Fill.E!t' nc.l/Fi l ter ERA 44hf20'17 1 1/17 11 7 MRA0-27 Filb!r aCilFilter ERA 4lh/20'17 1 tf 17/1 7 M RAD-27 Fi ll.et' cCilFilter ERA 4lh/20 1 7 1 lf17f17 MRAD-27 Waler oCiJl ERA 44hf20 1 7 1 tft7/17 MRAD-27 W.b!c cCi/L ERA 4lh/'20 1 7 1 1/17117 MRAD-27 Wat,y pCi/L ERA 4lh/"2017 1 l/t 7/17 MRAD-27 Wat,y pCi/1.. ERA 4th/20 1 7 1 1ft7/17 MRAD-27 Wat<< DCi/L ERA 4thl20 1 7 1 flt7/1 7 MRA0-27 Water nC.i/1 ERA 4lh/'20 1 7 1 t/17/1 7 MRA0-27 WaAa nCi/L ERA 4lh/'20 1 7 1 lft711 7 MRAD-27 Water cO/L ERA 4ltv'20 1 7 1 1/1 7 1 17 MRA0-27 w~ cCi/L ERA 4lh/20 1 7 1 t/17/17 MRAD-27 Waler pCi/L ERA 4lh/'20 1 7 1 lff7117 MRA0-27 Wate-pCi/L ERA 4thl20 1 7 1 1/17 11 7 MRA0-27 Wati,t-pCi/L ERA 4lh/'20 17 1 1fl7f17 MRAD-27 WillE!t' cCi/L ERA 4lh/'20 17 1 lft7 1 17 MRAD-27 Water i,C i/L ERA 4!h/20 17 1 1'17/17 MRAD-27 Watet' nC.iJl ERA 4lh/20 17 1 1/1 7/17 MRA0-27 Water nCill. ERA 4lhf20 1 7 1 1/17 1 17 MRA0-27 Water nr;n ERA 4lh/20 1 7 1 t/17/17 MRA0-27 Water µglL ERA 4lh/20 1 7 1 1117117 MRAD-27 Wal.et' ualL ERA 4IW20 1 7 1 11\7/17 MRA0-27 Wat<< .UQIL ERA 41h/'2017 1 1117'17 MRA0-27 Water cOJ1. ERA 4W20 1 7 1 1/17117 MRA0-27 Water cCi/l ERA 4th/20 1 7 I t/17/17 MRA0-27 WatE!t' c0/1. ERA 4ih/2017 I 1'17117 MRAD-27 w~ nC.iJl EZA 4lh/20 1 7 02/02/1 8 E 1 2067 ea.tridae ca EZA 4th/20 1 7 02/02/1 8 E 1 206B Mil k oCiJL EZA 4ih/20 1 7 02/02/1 8 E 1 206S Mil k nCi/L EZA 4thf20 1 7 02/02/1 8 E 1 2009 Mil k oCi/1 EZA 4!h/2017 02/02/1 8 E 1 2000 Mil k nC.l/l EZA 4th/'20 1 7 02/02/1 8 E 1 2009 Mil k nCi/1 EZA 4lhf20 1 7 02/02/1 8 E 1 2069 Mil k cO/l EZA 4lW'l0 1 7 02/02/1 8 E 1 200Q Milk oCi/l Page 11 of 12 GEL Labora: ortes LL C 0 l'tlB1 1 d, n C-4U i:iil,.lQ. >!!OC -GEL __ , Nuclia Val!R U r num-Total: (mass) 1 24 U r num-Tota l (ma55) 11 3 Zinc-85 146 Gross~a 60 Gros s Beta 68_3 AIIBicium-24 1 1 76 Cesi u m-1 34 1 340 Cesi u m-1 37 300 C<lbalt-60 1 ggo lron-05 1 550 t.tanoanese-54 <tl.38 P l u lcriu m-238 1 36 Plu ti:riu m,, 239 1.1 4 Strontitm-90 2 1 8 Umni iin-234 1 63 Urani iin-234 1 53 Ura n i tm-234 1 57 Ura ni iin-238 161l Urani iin-238 1 36 U ra~Total 306 U ra rw m-Total 3 10 U ra niu m-T ota l 343 U r.num-Tota l (mass) 5 1 0 U r arw u m-Total (mass) 463 Ur ani u m-T ota l (mass) 407 Zinc-85 20QO GrossAJnha 109 Gross Beta 127 Triiu m 2 11 00 lod i ne-1 3 1 4.84E+0 1 Strontilan-89 Q.54E+OI Stn: nti tm-00 1.34E+01 Ceriu m-t 4 1 1.07E+02 Cdla l t-58 9.21l E+Ol Cd>a l t-60 1.Q5E+02 Chromium--5

• 1 2.6QE+02 Cesiu m-1 34 1 20E+02 2017 AREOR oel com Accept-Known --Ratio &aalion 123 78,7-1 73 Acoectable 123 78,7 -1 73 Acoectable 123 88-1 -1 70 Acoent,.ble 50_ 1 1 6.8-77.8 Aa,ectable 61.8 39.1-00.1 Acceotable 158 106-2 1 2 Acoeptable 14 00 1 030-1 610 Acoent"'11e 378 32 1 -453 Acoenbble 1 830 1 500-2 1 40 Acoelltable 1 640 978-2230 Acceptable

<1 00 <100 Acoeotable 158 1 1 7 -19 7 Aooo>mable f 34 104-1 6 9 Aoceolable 222 1 4 5-293 Acoectable 160 120-206 Acoeptable 160 120-206 Acoectabl:e 160 120-206 Acoec&able 1 58 120-1 114 Acoent>hle 1 58 120-1 94 ~e 325 239-420 Acoent>hle 325 239-420 Acoeotable 325 239-420 Acoente>hle 474 378-573 A,,n,..nt;,ble 474 378-573 A,::oeptable 474 378-573 Acoel>table 1750 1 460-2210 Acceptable t 1 3 40.1-1 75 Acoeotable 130 74.4-1 93 Aocelllable 15 1 00 -.22500 32 1 00 AcoeDtable 4.8 1 E+0 1 1.0 1 Aooeolable 9.23E+0 1 1_03 Acoectable 1.61lE+0 1 0-7 9 Aocenbble 9.83E+0 1 1.ClQ Acoeolable 8.QQE+0 1 t.03 Aocent.o>ble 1.73E+02 1.13 ~ble 2.42E+02 1.11 Aocectable 1.25E+02 0.96 Acoeotable Page I 65

---

APPENDIX C 2017 AREOR Mal Labo r atorieSLLC

• I l'll1l *r c.l h e G EL Gr o u p i; r 1 100 178 oer com ---Aapart Atcept.w ..... PT Quiirt.r Aeceiwcl s-.-GEl. Known Rlngl!I Provider /Year -~ Media Unit -,~ YMIII! Wllue Raio EZA 4lh/20 1 7 02JC121 1 8 E 1 2069 Mlk nO/L CesaJ m-1 37 1.63E+Cl2 l.4 1 E+Cl2 1. 15 Aooenbihle EZA 4thl20 1 7 02JC121 1 8 E 1 2009 Mil k nO/L lron-5Q 1.27E+Cl2 L1 3E+02 f.1 2 Aocen>"ble EZA 4thl20 1 7 02JC121 1 8 E 1'2009 Mil k r>C.i/L l od i ne-1 3 1 6.5QE+D 1 5.78E+D 1 1.1 4 ~~hi e EZA 4thl20 1 7 D2/lJ2/1 8 E1200Q U(k ..r.i/L Lbnnanese-5,4 1.7QE+02 1.6 1 E+Cl2 1.1 1 Aooe-bl.e EZA 4lh/20 1 7 D2/lJ2/1 8 E 1 2009 ur k ..r.i/L Zino-65 2.34E+02 2.1 1 E+Cl2 1.1t Aooeotable EZA 4lh/20 1 7 02/lJ2/1 8 E 1 2070 Wa4Pr nO/L Cerium-t 4 1 6 .. 60E+D 1 6 , 24E+D 1 1.06 Aooeotable EZA 4lh/20 1 7 02/lJ2/1 8 E 1 2D70 Wa4Pr nO/L Cobalt-58 5.95E+D 1 5.70E+D 1 l.04 Acoenbble EZA 4thl20 1 7 D2/C121 1 8 E 1 207'0 Wa4Pr ..r.i/L Cobalt-<<)

1.1 5E+02 1.1 0E+Cl2 1.05 Aooent,.ble EZA 4thl20 1 7 02/021 1 8 E 1 2070 Wale£ nr'J/L Cl-.omrum-5 1 1.68E+02 1.54E+Cl2 t.l)Q Aooeotable EZA 4lh/21l17 02'02/1 8 E 1 2070 Water nr'J/L CesaJ m-1 34 7.47E+Dt 7.92E+D 1 CHM Aooeolable EZA 4lh/20 1 7 02/021 1 8 E 1 2D7D Wal£!r DOIL Cesium-1 37 9.3 1 E+ol 8.97E+D 1 1.04 Aooeotaible EZA 4lh/20 1 7 02'02/1 8 E 1.2070 Water DCiJI. l ron-59 8.74E+o 1 7.1 QE+D 1 1.22 Aoceal.Bble EZA 4thl20 1 7 021Cl21 1 8 E 1 2070 Water nr;/L lod i ne-'1 3 1 5.36E+D 1 4.95E+D 1 1.08 Aooen>~bfe EZA 4th.12ll 1 7 02/C121 1 8 E 1 2070 w-DOIL . r, l.1 4E+Cl2 1 .. 02E+Cl2 1.12 A<,oi,atabfe EZA 4th.12ll 1 7 D2/lJ2/1 8 E 1 2D70 w-DOIL Zino-65 1.57E+Cl2 1.34E+Cl2 1.17 A<,oi,atabfe Page 12 of 12 Ga Labor&torles u.c Page 166 APPENDIX D. COMPARISON OF OPERATIONAL TO PREOPERATIONAL DATA 2017 AREOR Page I 67 APPENDIX D 2017 AREOR Comparison of Operational to Preoperational Data and Analysis of Trends Unit 1 achieved criticality on June 14, 1967 and was permanently retired from service on November 30 , 1992. Unit 2 attained initial criticality on July 26 , 1982 and Unit 3 on August 29 , 1983. A variety of environmental samples were analyzed and the analytical results (January 1 , 1979 to July 31, 1982) were compared with the 2017 operational data obtained for SONGS Units 2/3. The following media were evaluated and compared with the operational data of SONGS Units 1 , 2 and 3:

• External Radiation
• Air Particulates
• Radioiodine
• Ocean Water
• Shoreline Sediment (Sand)
• Ocean Bottom Sediments
• Marine Species
• Local Crops
• Soil
• Kelp
• Drinking Water The measurements obtained from the SONGS Unit 1 operational Radiological Environmental Monitoring Program (REMP) during the period from January 1979 to July 1982 are used as the preoperational baseline for SONGS Units 2/3. This is in accordance with San Onofre Units 2/3 , Environmental Report, Operating License Stage , Appendix 6A, Pre-operational Radiological Environmental Monitoring, May 31, 1978. Comparisons of preoperational data to 2017 operational data are possible for each of the following exposure pathways: ( 1) direct radiat i on, (2) air particulates (inhalation), and (3) ocean water (marine pathway for ingestion). Comparisons can also be made between preoperational and operational data for ocean bottom sediment data to ascertain if there has been any significant increase in radioactivity in ocean bottom sediments near the SONGS Units 2/3 outfalls. Currently the preoperational data are higher than the operational data. The decrease in radioactivity is due primarily to the cessation of nuclear weapons testing and to the decay of fallout radionuclides.

There is a close correlation between indicator and control data over several decades. There are no indications of adverse effects from SONGS on the environment. Page 168 APPENDIX D 2017 AREOR A. Direct Radiation The direct radiation measurements for the SONGS REMP were made by TLDs on a quarterly collection cycle at 38 indicator locations and 11 control locations in 2017. (See Appendix I for ISFSI TLD data). The TLDs were located at inner and outer ring locations as specified by the ODCM. During the preoperational period from January 1979 to July 31, 1982 , the indicator stations ranged from 16.1 to 46.6 mR. The preoperational indicator average was 25.3 mR. The preoperational control range was 19.3 to 30.1 and the control mean was 23.1 mR. During the 2017 operational year for Units 2/3, the routine indicator TLD locations ranged from 9. 7 to 21.6 mrem, averaging

16. 7 mrem while the control locations ranged from 13.1 to 20. 7 mrem with an average of 17.0 mrem. Outside the EAB, all TLD results (control and indicator , for quarterly and annual measurements) are below each locations historical background plus the minimum differential dose (see ANSI/HPS N13.3 7-2014). Refer to Appendix B for a detailed discussion of the REMP TLD data. Facto r s such as meteorology , local geology, the fallout from atmospheric nuclear weapons testing , and seasonal fluctuations account for the variability i n the data as observed during the preoperational period for each location. The decrease in radiation levels at all TLD sample locations is attributable to the curtailment of the atmospheric nuclear weapons testing , and the continued decay of the manmade background from fallout from past nuclear weapons tests. Figure 9 compares the environmental radiation levels of selected indicator and control locations. Simul t aneous variation in the radiation levels at both the control and indicator locations shows that the variations are due to factors external to SONGS. Outside the EAB there were no measurable levels of increased direct radiation associated with SONGS as measured by TLD. B. A i rborne Particulates From January 1979 through July 1982 ( considered to be the preoperational period for SONGS Units 2/3), there was a noticeably higher gross beta activity in air at all sample locations. This period extends from the fourth quarter of 1980 through the fourth quarter of 1981. These higher activity levels were attributable to the Chinese atmospheric nuclear weapons test conducted on October 15, 1980. Page 169 APPENDIX D 2017 AREOR OS o* .. . . . . O) 't 02 01 . . 0 * ... .. .. < .. .. .. : . . . : C: .. .. -----,,,._,,_ Al-phefle

"" ... ' -.,,_y ... Set,&. ttn ,~,,_ -"'*'",._ .. ~Tffl .._,.,,,. -San Clemente City Hall .... S.1 MIies NW * *

• Huntington Buch (CONTROL)

... 31.1 Ml

• NW -Suito Boach Part! ... 0.6 MIios ESE -Bluff_,. 0.1 Moles WNW Figure 12 -Monthly Average Airborne Particulate Gross Beta Preop e rational and Operational Data for Units 2 and 3 , ( 1976 -1988) For 2017, the maximum monthly average airborne particulate gross beta result was approximately 0.029 pCi/m 3. This result is in line with both recent history and SONGS preoperational data. C. Radioiodine Most of the preoperational data for 1-131 level was below the detection limit. All the 2017 operat i onal 1-131 data were below the detection limit. This is expected , as the shutdown and defueled SONGS is no longer producing 1-131 , and all previously produced 1-131 has decayed away. SONGS had no effect on the environment as measured by the radioiodine cartridge data in 201 7. D. Ocean Water Monthly ocean water samples were collected near each of the Station discharge outfalls , and from the Newport Beach control location. The ocean water samples are analyzed for naturally-occurring and station-related gamma-emitting radionuclides. Samples were composited quarterly and analyzed for tritium. Page 1 70 APPENDIX D 2017 AREOR During the preoperational period, naturally occurring potassium-40 was detected in each of the samp l es collected from both indicator and control locations.

Other gamma-emitting radionuclides were detected in only one ocean water sample. In May 1980, Co-58, Co-60, Cs-134, and Cs-137 were detected in an ocean water sample collected from the SONGS Unit 1 outfal l. Concentrations of the radionuclides in this sample were 11 , 6, 380 , and 430 pCi/1, respectively. Tritium was also detected in two of the ocean water samples collected in May 1980 from the SONGS Unit 2 outfall and from the Newport Beach control location. The data for all plant related radionuclides at all ocean water locations during the 2017 operational period were not detectable and below the MDC. We conclude that the operation of SONGS had a negligible impact on the environment as measured by this sample medium. E. Drinking Water Due to its location on the beach, there is no drinking water pathway for SONGS. Nonetheless, drinking water samples from Oceanside and Camp Pendleton were collected and analyzed. No plant r elated radionuclides were detected during the 2017 operational period. Gross beta activity (from natural radionuclides) was detected during both the operational and preoperational periods at both the indicator and the control locations. No plant related radionuclides (including tritium) have been identified in 2017 , and no trends have been noted. The operation of SONGS had no impact on the environment as measured by this exposure pathway. F. Shoreline Sediments (Sand) Beach sand is collected semiannually from three indicator locations and from a control location situated at Newport Beach. The samples are analyzed for naturally occurring and plant-related radionuclides. To assess the impact of SONGS operations on this environmental medium, preoperational data were c ompared to 2017 operational data. The radionuclide detected in shoreline sediment in the preoperational time frame was Cs-137 with a range of 0.012 to 0.022 pCi/g, averaging 0.019 in 5 sediment samples. One control sample with a Cs-137 activity of 0.032 pCi/g was observed in July 1979. The presence of Cs-137 in both control and indicator locations during the preoperational period leads to the conclusion that the root cause is external to SONGS and is most l ikely attributable to atmospheric nuclear weapons testing. No SONGS-related radionuclides were detected in shoreline sediment during the 2017 operational period. The operation of SONGS had no impact on the environment as measured by this exposure pathway. Table 3 1 -Shoreline Sediment Concentration Cs-1 3 7 PreOp 0.012 -0.022 0.019 < LLD -0.032 < LLD Ooerational < LLD < LLD < LLD < LLD All other SONGS PreOp < LLD < LLD < LLD < LLD radionuclides Ooerational c < LLD < LLD < LLD < LLD NOTES: a. Preoperational period is January 1979 -July 1982. Operational period is January 2017 -December 2017 b. LLD for operational data are listed in Appendix B c. During 2017 , all station related radionuclides from all sample locations were< LLD Page I 71 APPENDIX D 2017 AREOR G. O c e an Bo ttom S e d i men ts During the preoperational and operationa l periods , representative samp l es of ocean bottom sediments were collected semiannually from each of the Station dischar g e outfalls and from a c o ntrol station in Laguna Beach. The samples were analyzed for natura ll y occurring and SONGS related radionuclides. Duri n g the preoperationa l period. Manganese-54 (Mn-54) was detected in 5 of the 28 sam pl es. The concentrations of Mn-54 in t h ese samp l es ranged from 0.015 to 0.49 pCi/g, averaging 0.13 pCi/g. Cobalt-58 (Co-58) was detected in nine samp l es. The concentrati o n of Co-58 in the samples ranged from 0.013 to 1.16 pCi/g, averaging 0.20 pCi/g. Cobalt-60 (Co-60) was measured in 15 of the 28 samples. The concentration of Co-60 in the sample ranged from 0.014 to 8.1 pCi/g, averaging 0.79 pCi/g. Cs-137 was also detected in 16 of the 28 samples. The concentrat i ons of Cs-137 in the samples ranged from 0.014 to 0.090 pCi/g , averaging 0.039 pC i/g. Cerium-144 (Ce-1 44) was found in two samples. The concentration of Ce-144 in the samples was 0.06 and 0.26 pCi/g , respectively. Resu l ts of the 2017 data indicate that there has not been a build-up of radionuclides with time in ocean bottom sediments near SONGS. The results also ind i cate notable decrease in the concentrations of plant-related radionuclides in the ocean bottom sediment. Although Co-58, Co-60 , and Cs-137 are normally associated with nuclear power operations , preoperational study reveals no accumulation trend for these radionuclides , and no i ncrease in levels for these radionuclides was detected during the operational period. The concentration of station-rela t ed radion u clides in all ocean bottom sediment samples ana l yzed in 2017 was be l ow the MDC , supporting the conclus i on of no detectable i mpact on ocean bottom sediments from SO N GS. Tab l e 32 -Ocean Bottom Sediment Concentr at ion Mn-54 PreOp 0.015 -0.4 9 0.1 29 < LLD < LLD Ooerationa l < LLD < L L D < LLD < LLD Co-58 PreOp 0.013-1.160 0.199 < LLD < LLD Ooerational < LLD < LLD < LLD < LLD Co-60 PreOp 0.014-8.100 0.788 < LLD < LLD Ooerational < LLD < LLD < LLD < LLD Ag-110 m PreOp < LLD -0.020 < LLD < LLD < LLD Ooerat i onal < LLD < LLD < LLD < LLD Cs-137 PreOp 0.014 -0.090 0.039 < LLD < LL D Ooerational < LLD < LLD < LLD < LLD Ce-144 PreOp 0.060 -0.260 0.160 < LLD < LLD Ooerational < LLD < LLD < LLD < LLD All o t her SONGS PreOp < LLD < LLD < LLD < LLD rad i onuclides Ooerationa l c < LLD < LLD < LLD < LLD Page 172 I APPENDIX D 2017 AREOR NOTES: a Preoperational period is January 1979 -July 1982. Operational period is January 2017 -December 2017 b LLD for operational data are listed in Appendix B c During 2017 , all station related radionuclides from all sample locations were< LLD H. Marine Species (Flesh) Non-migratory marine species are collected semi-annually near SONGS. As a norm, marine species caught by the SONGS outfalls and from Laguna Beach include various species of adult fish, crustacean and mollusks. Upon collection the flesh portion is analyzed for gamma-emitting radion u clides as specified in the ODCM. The results are subsequently reported as pCi/g, wet weight. Results for several marine species for both the preoperational and 2017 operational periods for Units 2/3 are summarized in Table 33. The marine species used for purposes of comparison include: Sheephead (a fish), Blacksmith (a fish), Black Perch (a fish), Bay Mussel (a mollusk), and Spiny Lobster (a crustacean). Radionuclides analyzed but not included in Table 33 were below the lower limits of detection for both the preoperational and operational periods. During the 2017 operational period, no SONGS related radionuclides were detected above the MDC. The data indicate no accumulation trends. The operation of SONGS in 2017 had no impact on the environment as measured by this exposure pathway. Table 33 -Marine Species Concentration Co-58 PreOp 0.016 -0.030 0.023 < LLD < LLD Operational < LLD < LLD < LLD < LLD Co-60 PreOp 0.005 -0.044 0.017 < LLD < LLD Operational < LLD < LLD < LLD < LLD Ag-110m PreOp < LLD -0.004 < LLD < LLD < LLD Operational < LLD < LLD < LLD < LLD Cs-13 7 PreOp 0.004 -0.018 0.007 0.005 -0.012 0.007 Operational < LLD < LLD < LLD < LLD All other SONGS PreOp < LLD < LLD < LLD < LLD radionuclides Operational < LLD < LLD < LLD < LLD Co-58 PreOp 0.009-0.011 0.010 < LLD < LLD Operational < LLD < LLD < LLD < LLD Co-60 PreOp 0.004-0.045 0.017 < LLD < LLD Operational < LLD < LLD < LLD < LLD Ag-110m PreOp 0.002-0.009 0.006 < LLD < LLD Operational < LLD < LLD < LLD < LLD Cs-137 PreOp 0.003-0.015 0.008 0.004-0.014 0.009 Operational < LLD < LLD < LLD < LLD Page 173 APPENDIX D 2017 AREOR All other SONGS Mn-54 PreOp 0.009 -0.025 0.017 < LLD < LLD Operat i onal < LLD < LLD < LLD < LLD Co-58 PreOp 0.008 -0.080 0.028 Operational < LLD < LLD < LLD < LLD Co-60 PreOp 0.005 -0.400 0.077 < LLD < LLD Operational < LLD < LLD < LLD < LLD Cs-137 PreOp 0.003 -0.006 0.004 < LLD < LLD Operational < LLD < LLD < LLD < LLD Ru-103 PreOp < LLD -0.045 < LLD < LLD < LLD Operational < LLD < LLD < LLD < LLD All other SONGS PreOp < LLD < LLD < LLD < LLD radion u clides Operational < LLD < LLD < LLD < LLD Co-58 PreOp 0.007 -0.270 0.086 < LLD < LLD Operational < LLD < LLD < LLD < LLD Co-60 PreOp 0.0 1 4 -0.210 0.060 < LLD < LLD Operational < LLD < LLD < LLD < LLD Cs-137 PreOp 0.005 -0.011 0.008 0.040 -0.015 0.008 Operational < LLD < LLD < LLD < LLD All other SONGS PreOp < LLD < LLD < LLD < LLD radionuclides Operational < LLD < LLD < LLD < LLD NOTES: a Preoperational p e riod is January 1979 -July 1982. Operation al period is J a nuary 2017 -December 2017 b LLD for operational data ar e listed in Appendix B C During 2017 , all station related radionuclides from all sample locations w e r e< LLD d Species collected in 2017 i nclude California Mussel , Sheephead , Kelp Bass , Keyhole Limpet and Spiny Lobster I. Local Crops In the preoperational period of January 1979 through July 1982 , Sr-90 was detected in the contro l samples of kale, parsley , and squash. Naturally occurring K-40 was detected in cucumber , kale, and tomato samples from the indicator and control locations. Ce-144 and Zr-95 were detected in one sample of parsley at the control location at concentrations of 0.12 and 0.09 pCi/g, wet weight respectively. During 2017 , only natural radionuclides were identified in local crops , at both the indicator and contro l locations. The operation of SONGS had no impact on the environment as measured by this exposure pathway. Page 174 APPENDIX D 2017 AREOR J. Soil A comparison of operational and preoperational data does not reveal any accumulation pattern of SONGS related isotopes in soil. The intermittent detection of Cs-137 in both indicator and contro l locations is due to residual fallout from atmospheric nuclear weapons testing. The operation of SONGS had no impact on the environment as measured by this exposure pathway. Table 34 -Soil Concentration I 'i V..) .. . . , . ,,, " . . ., .. . Sr-90 PreOp 0.02 -0.08 0.044 < LLD -0.03 < LLD Operational N/A N/A N/A N/A Cs-137 PreOp 0.02 -0.20 0.096 < LLD -0.06 < 0.10 Operational <LLD-0.17 0.17 <LLD-0.193 0.117 All other SONGS PreOp < LLD < LLD < LLD < LLD radionuclides Operational < LLD < LLD < LLD < LLD K. Kelp Kelp is collected semiannually from three indicator locations and from a control location situated at Salt Creek. After collection , the samples are analyzed by gamma-spectral analysis for naturally-occurring and SONGS-related radionuclides. To assess the impact of SONGS operations on kelp, preoperational data were compared to 2017 operational data in Table 35. Radionuclides detected during the preoperational period for SONGS include Mn-54 , Co-60 , Zr-95, 1-131 , and Cs-137. During the 2017 operational period , 1-131 was detected in three indicator and one control sample. No other station related isotopes were detected in kelp samples during the 2017 operational period. Figure 10 shows a close correlation between indicator and control sample locations over an extended period of time. Although 1-131 activity has been detected in kelp since 1977 , there is no evidence that the concentration of 1-131 or other station related radionuclides are a result of operations at SONGS. The presence of 1-131 in kelp is apparently due to the sewer release of medical administrations of radioisotopes , since it has been detected consistently in control as well as indicator locations. S i nce 1988 the concentration of 1-131, when detected, has typically been highes t at the control locations. Page 175 ! .. t APPENDIX D 2017 AREOR Table 35 -Kelp Concentration ! *, * * ~. '. ,. " / * ~t '",. ; "{'Y,;; i"}* V.o;: " ' ' ' '. -. ('< : 'C:4?"'::

' ~:: ;~:* -. ::'"t f;";~:'*1::~~.;"?

"') .-* ?:., ,., ::};4"j ' t r ,, ' ' ! I :, * ' ' >:< * * * ' * ,,}~ I I * . . * .. :,' ,, , ,:*li.<r ., . ,:,t~ , , J r' .. , . ~, 1~,,... .. , * , ,.7 , , ,r '. I " ,. ' "~ 1 r ~... ' " .. ,,..,.,,j,.'.._,,;;.,* _.,J 11..t .. u,,~ "'"'~;i,,:,;, , """ f>li. .I,:,.; ; f...k-k.;. "~Ji,,,,,&.;,;. b<Jn"'., :~/. ,-;::. ~f,,;r;t-J.::<,az-1 iJ....,,)<,,, 1 r:it~~1, +. .. , < "' * ';;.Ji;' :.,,} Mn-54 PreOp < LLD -0.005 < LLD < LLD < LLD Operational < LLD < LLD < LLD < LLD Co-60 PreOp 0.006 -0.009 0.008 < LLD < LLD Operational < LLD < LLD < LLD < LLD Zr(Nb)-95 PreOp 0.014 -0.090 0.046 0.018 -0.053 0.036 Operational < LLD < LLD < LLD < LLD 1-131 PreOp 0.006 -0.024 0.013 0.008 -0.030 0.014 Operational 0.084 -0.133 0.113 0.081 -0.081 0.081 Cs-137 PreOp 0.004 -0.071 0.027 < LLD < LLD Operational < LLD < LLD < LLD < LLD All other SONGS PreOp < LLD < LLD < LLD < LLD radionuclides Operational < LLD < LLD < LLD < LLD The 1-131 results in 2017 are much higher than found during the preoperational program. However , all of the positive results were from the April 2017 sampling and were found in both indicator and control sample locations. No 1-131 was detected during the October 2017 sampling. These data, a l ong with there no longer being a viable production mechanism for 1-131 at SONGS, support the conclusion that the detection of 1-131 in kelp is due to factors external to SONGS. Page 176 APPENDIX E. DEVIATIONS FROM ODCM SAMPLING REQUIREMENTS IN 2017 2017 AREOR Page 177 APPENDIX E 2017 AREOR DEVIATIONS FROM ODCM SAMPLING REQUIREMENTS Devia t ions from the ODCM sampling requirements are identified below in accordance with sectio n 5.0 of the ODCM. The performance standard for environmental data collection of 95% was m et for all sample types. During 2017, the ODCM specified a priori LLD was achieved for all REMP samples. Deviations from the ODCM were associated with external factors not within the control of REMP personnel such as limited availability of marine samples at the locations speci fi ed i n the ODCM. The 2017 ODCM deviations had no meaningful impact on the REMP database and did not compromise the validity of the reported conclusions. A. Direct Radiation Thermoluminescent Dosimeters (TLDs) 1. During the 2017 1st quarter TLD change out on 4/5/2017, it was identified that TLD #46 (South State Parks Beach Trail #1) had the bottom of the TLD canister broken off (vandalism) and the TLD was missing. A new TLD canister and the 2nd quarter TLD was re-established at the location. This resulted in a total of 195 direct radiation samples on Table 14 instead of 196 samples. 2. Collection of three (3) TLDs located on Camp Pendleton was delayed for the second quarter due to denial of access from Range Control. TLDs are normally collected between April 1 and 10 , however they were collected on April 18 (AR 0317-39889). B. Air Sampling At SONGS , there are a total of 7 Indicator and 1 Control Air Samplers. Downtime for each air sampler in 2017 was due to weekly sample collection , annual Preventat i ve Maintenance (PM), and the change outs for the flow meters/pumps was appro x imately 46 minutes for each sampler. Weekly Change Ou t: 0.5 minutes (approx.) x 52 = 26 m i nutes Annu a l PM 15 minutes (approx.) Annu a l Flow meter/Pump change out 5 minutes (approx.) Downtimes in excess of 1 hour are addressed below for each ODCM required air sample. 1) Air Sampler #13 (Camp Pendleton). On February 21 , 2017 , Camp Pendleton schedulers cancelled our access into Alpha-2 Training Area due to hazardous conditions created by rain storm on February 17 , 2017. The roads in the area were impacted by flash flood conditions. The air sample was changed out on February 28 , 2017 and analyzed. This resulted in one 14-day sample instead of two separate 7-day sample periods as required by the ODCM (AR# 0217-28430). Thus the total number of REMP air particulate samples listed on Table 14 was reduced to 415 samples for 2017. 2) On June 20, 2017 , the air sampler pump failed after 95 hours of sample collection. The samples were collected and analyzed. There was no detectable licensed plant material on sample's media (AR 0617-23286). 3) On November 26 , 2017 Air Sampler #13 was out of service from approximately 0138 to 0518, due to a power outage at the MESA. 4) On November 28 , 2017 Air Sampler #13 was out of service from approximately 1202-1400 , due to a power outage at the MESA. In all t h ese events , the Radiological Effluent and Environmental Specialist reviewed previous and post event's data to verify that all ODCM LLDs were met. C. Ocean Water Sampling No de v iations were observed Page 178 APPENDIX E D. Drinking Water No deviations were observed E. Shoreline Sediments No deviations were observed F. Ocean Bottom Sediments No deviations were observed G. Marine Species (Flesh) No deviations were observed H. Local Crops No deviations were observed I. Soil No deviations were observed J. Kelp No deviations were observed 2017 AREOR Page 179 2017 AREOR APPENDIX F. LAND USE CENSUS Page I 80 APPE N DIX F 2017 AREOR Introduction The regulatory basis for conducting a Land Use Census (LUC) is identified in 1 OCFR50 , Appe n dix I , Sec IV.B.3. The purpose of the LUC is to " identify changes in the use of unrestricted areas and to permit modifications in monitoring program for evaluating doses to individuals from pr i nciple pathways of exposure." 1 In addition, Regulatory Guide 4.15, Rev. 1 , section C3 address that " written procedures should be prepared , reviewed, and approved for activities involved in carrying out the monitoring program." The 2017 LUC was conducted to compl y with the surveillance requirement as defined in the Offsite Dose Calculation Manual (ODCM) Section 5.2. The current Radiological Environmental Monitoring Program Procedure S012 3-IX-1.20 , Land Use Census, establishes the method of documenting and verifying land use results obtained in compliance to San Onofre's Technical Specifications and ODCM. Executive Summary The land area around San Onofre Nuclear Generating Station (SONGS) is not subject to significant change due to the nature of the land uses. The area around SONGS is divided into sixteen (16) geographical sectors. The Pacific Ocean and United States Marine Corps (USMC) Base Camp Pendleton comprise 13 of the 16 sectors surrounding SONGS. The City of San Clemente (a mature municipal area) and coastline comprise the remaining three sectors. Therefore , the characteristics of the local land area substant i ally inhib it significant land use chang e s. Definition of Uses Residence is defined as any structure (single-family house , apartment, mobile home, barracks or sim i lar unit) that is occupied by an individual(s) or resident(s) for three months or longer in a given y ear. Other Specified Use is defined as a location occupied by members of the general population as oth e r than their pr i mary residence. The use is divided into two categories

employment and non-employment related. Employment use is defined as a location occupied by members of the general population engag e d in normal work activities regardless of the length of time spent at the location, and regardless of its permanence, including concession stands , restaurants , campground hosts , marke t s and guard shacks. Non-employment-related use is defined as a location occupied by members of the general popul a tion who are not engaged in normal work activities , including campgrounds, temporary housing, time-share condominiums, motels, hotels , schools and beaches. Milk animals are cows, goats , and sheep whose milk is used in dairy products for human consumption.

Meat animals include, but are not limited to, deer , cattle , goats and sheep whose meat is used for human consumption. 1 10 C F R 50 Appendix I , Section IV , B.3 Page I 81 APPENDIX F 2017 AREOR Fresh, leafy vegetables include , but are not limited to , lettuce , cabbage and spinach. Fleshy vegetables include , but are not limited to , tomatoes , cucumbers, cauliflower and sweet corn. The Land Use Census Scope The land area around SONGS includes both Orange and San Diego counties. The Orange County portion includes a portion of the city of San Clemente ( official population as of July 2016 is 65 , 309 per the city's demographics and statistical information website) and the San Clemente State Park. The San Diego County portion includes much of the (USMC) Base Camp Pendleton , San Onofre State Beach and Park , and SONGS itself. The LUC map is divided into 16 geographical sectors: A , B , C , D, E , F , G , H , J , K , L, M , N , P , Q and R. The ODCM surveillance requirement is performed by identifying the location of the nearest garden greater than 500 square feet, nearest milk animals , nearest residence , and other i dentified land uses in each of the sixteen (16) geographical sectors within a distance of five (5) miles from San Onofre Units 2 and 3. In addition , the Land Use Census aids in detecting changes in the presence of hazardous manufacturing and handling facilities within the five (5) mile radius. The methodology consists of reviewing data from the previous LUC reports and verifying if any information has changed. The LUC is conducted and updated at least once per 12 months between the dates of June 1st and October 1st. Also , non-resident i al usage such as fire stations , surf camps and other potential pathways of exposure to an indiv i dual are identified due to the fact that these usages are closer to full time residence based on information provided by the appropriate point of contact or agency. Secto r s A, B , C , D , E , and F include land within the boundaries of (USMC) Base Camp Pendleton. The study area in sector G includes the area along the coast south of SONGS. Secto r s H, J , K , L , M , and N are the Pacific Ocean , therefore no land use possible. Sectors P , Q , and R include a section of San Clemente and part of Camp Pendleton. Research Methodology Completion of the 2017 SONGS Land Use Census required conversations with agencies , organ i zations, individuals and field research. The Radiological Effluent and Environmental Specialist reviewed the previous 2016 LUC and associated documentation spreadsheet. Then the data was verified. If changes occurred , then changes were reflected in this Land Use Census. This was accomplished by contacting the point of contact for the appropriate agency, organ i zation, or military base whom possessed knowledge on the land usage. The following agencies and organizations were contacted or additional information was researched through their respective websites:

• California Highway Patrol
• Orange County Agricultural
• State of California Department of Parks and Recreation , including San Onofre State Beach
• United States Border Patrol
• USMC Base , Camp Pendleton
• City of San Clemente In cases where it was deemed appropriate, letters requesting information were sent t o residents that in the past Land Use Census have identified gardens 500 square feet or greater. The Page I 82 APPENDIX F 2017 AREOR United States Border Patrol did not respond to our inqu i ries due to national security so an " estimated hours of occupancy" value of 2400 hours was utilized.

It was determ i ned that military personnel would have complete control over the land uses w i thin the i r jurisdict i on. Communication provided by the point of contac t s from Camp Pendleton and State Parks was considered final. Agency contact and documentation were completed in comp li ance w i th the Land Use Census procedure. Field Research During and after the completion of the preliminary research , field research was undertaken to confirm i nitial find i ngs and obtain further information necessary to complete the Land Use Census. Field research was initiated i n mid-August 2017. Data and Methodology Summary The appropriate i ndividual or organization was identified for each ex i sting and new LUC location. The ind i vidual or organization was contacted to determine the use and occupancy for that loca t ion. For each LUC l ocation , the appropriate individual was asked to provide an estimate of annual occupancy based on personal knowledge of the location. The information gathered i s summarized in Table 1. Additional information , not requ i red by the ODCM , has been included in Table 2 for historical trending purposes. Documentation Spreadsheet Throughout the study , records of contacts and findings were mainta i ned in accordance with the Land Use Census Procedure , S0123-IX-1 .20. A documentation spreadsheet was prepared and retained in the Rad i ological Effluents and Environmental files. The spreadsheet may have telephone notes , agency contacts , Southern Cal i fornia Ed i son (SCE) memoranda , and any other types of correspondence. 2017 Land Use Census Observations and Changes The follow observations were noted:

• Historically , several gardens have been identified on Avendia Salvado r and documented i n the Land Use Census. A drive by was conducted and the following was obser v ed: o Only a plot of land existed with an absence of a garden at 788 Avend i a Salvador.

Its designation was G-17. Since this plot of l and has no garden , l etters were sent to the owners at 786 Avendia Salvador and 790 Avendia Salvador addresses to veri f y any potential gardens. o The owner at 786 Avendia Salvador in San Clemente located in Sector R , stated that a garden existed on the property. The newly identified garden was given the designation G-19. o The owner at 790 Avendia Salvador stated that a garden no longer existed. This garden was g i ven the designation G-20.

• The SONGS indicator garden was relocated to a location near Air Sampler #11 in order to return a portion of the MESA t o the Department of the Navy. (from 0.4 miles NNW to 0. 7 miles NNW).
• The sewage treatment plant tha t is northeast of the Mesa property was being upgraded with new storage tanks and equ i pment. Per the Camp Pendleton contact , this will not be manned continuously. The sewage treatment plant workers are required to check in on the facility 3 to 4 times a day. Page 183 APPENDIX F 2017 AREOR Chemical and Toxic Waste The p r esence of manufacturing facilities , chemical plants , and toxic waste sites was researched to provide information in detecting any hazardous chemicals , which could impede the operation of SONGS through fire, explosion, or chemical spills. Some manufacturing is located in the northeastern section of the city of San Clemente and is outside the study area. No such uses are allowed to exist in the commercial and residential areas of the city of San Clemente within the study area. In Camp Pendleton, there are no designated manufacturing or chemical use areas within the 5 mile radius of the plant based conversation with Camp Pendleton's Director of Community Plans and Liaison Office. Milk Animals No da i ries or other facilities producing milk for human consumption were identified in 2017. Meat Animals No ag r icultural meat animals were identified during the 2017 LUC. The only known meat animal pathway land uses is recreational hunting. Deer graze year round on Camp Pendleton.

Growing Season for fleshy and leafy vegetables Leafy vegetable samples are available at the SONGS garden year round. Fleshy and leafy vegetables were available approximately eight months during 2017 at the SONGS garden. Desalination Plant in Carlsbad, California The Carlsbad desalination plant ( officially known as the Claude " Bud" Lewis Carlsbad Desalination Plant) opened on December 14, 2015. The plant is 27 miles south of SONGS. It is located on the coast adjacent to the north end of the Encina Power Station. The plant produces approximately 50 million gallons of water per day. It is the largest and most technologically advanced desalination plant in the Western Hemisphere. The plant produces enough water to meet the daily needs of 300 , 000 San Diego residents Summary of Changes For the period of July 1, 2016 to June 30 , 2017 , the Camp Pendleton deer hunting take data was updated and reflected in Table 3. Per the USMC wildlife biologist, the exact location of a particular kill was not known. The reported take area should be interpreted as an estimate of approximate location. Thus a deer reported taken in hunting area Alpha 2 may actually have been taken in an adjacent hunting area (such as Romeo 3 or Bravo 3). There were no changes to the estimated distances from SONGS to the nearest vegetation potentially consumed by deer from July 1 , 2016 through June 30, 2017. Page I 84 APPENDIX F Distances to nearest vegetation typ i cally consumed by deer: Units 2/3 Sector p Q R A B C D E F G Distance from Units 2/3 (miles) 0.3 0.3 0.2 0.1 0.1 0.1 0.1 0.2 0.3 0.1 2017 AREOR Page I 85 APPENDIX F 201 7 AREOR Table 1 -SONGS 20 17 Land Use Census -E i,' -E i,' ! 0:, C: 0 :, C: .~ Units Miles ' :, )( :, Miles Miles ::, *x::, 0"' 8 2/3 from j _g; 8 from from .c~o Sector LUC# Residence U2/3 L UC# Gardens U2/3 L UC# Other Specified Uses U2/3 A R-A1 Camp San Mateo 3.6 FTR 0-8 Camp San Mateo Motor Pool 3.6 2 , 000 22 SCE Land Uses 0.4 B 0-9 USMC CP Sanitary L and Fill 2.1 816 C R-C2 Camp San Onofre F i re Station #7 52 Area 2.4 FTR 0-10 Camp San Onofre (STP #11} 2.2 2 , 000 R-C1 Camp san Onofre Barracks 524101 2.8 FTR R-C3 Camp San Onofre Barracks 2.6 FTR D R-D1 Camp San Onofre B arracks 3.0 FTR E R-E1 Camp H omo Barracks 4.1 F T R 0-5 Cam p Homo M oto r P oo l 4.0 2 , 500 F 0-1 San Onofre State Beach Guard Shack 0.8 1 , 500 31A Border Patrol Checkpoint (N B) 1.9 2,400* 318 H wy P atrol W eigh Station (NB) 2.1 1 , 960 G R-G1-San Onofre State Park-camps it e s#99-104 3.0 FTR 0-2 San Onofre Beach Campground 1.8 720 2 Camo Host Volunteers over 18 yrs. 32 H wv P atrol Wei o h Statio n (S B l 2.1 1 , 960 0-2A E n d less Summer Surf Camp (see notes) I 2.8 4 , 380 Campground Host 0-2B YMCA Surf Camp (see notes) 2 576 Sectors H , J , K , L , M , and N have no identified land uses T hese sectors are p rimarily the P acific Ocean and contain only a small portion of the plant site , an d a beach walkway providing access for state beach park users north & s o uth of S O N GS. p R-P3 San Onofre Rec Beach (SORB) 1 FTR G-3 4130 Calle Isabella 2.8 0-6 Surf Beach (Lifeouardl 0.5 800 R-P2 San Mateo Po i nt housing 2.7 FTR G-14 4090 Calle Isabella 2.9 3 Trestles Beach Lookout tower 1.8 500 R-P1 Cotton po i nt Estates 2.7 FTR 0-2 D Summer Sou l Surf Cam p 0.5 4 40 Q R-Q5 SORB Resident Emp l oyee 1.1 FTR G-8 2240 Ave Salvador 4.1 0-3 State Park Office Trailer 0.69 2 , 000 R-Q2 San Onofre Il l housing 1.4 FTR G-5 1706 S Ola Vista 4.4 5 Surf Beach Guard Shack 0.7 1 , 500 R-Q3 San Mateo Po i nt Housinq 2.7 FTR G-15 130 Calle del Pacifico 4 18 S O R B Lifequard Tower 1.2 2 , 0 00 G-18 115 Ave San P ablo 4.1 1A S O RB Camporound Check-in 1.3 2 , 0 00 R R-R1 S an Onofre Ill housinq 1.3 FTR G-10 SO N GS Garden 0.4 G-19 788 Ave Salvador 4.9 Bold Text indicates a change from the 2016 LUC Data as of 9-30-2017 FTR -Full Time Residence Page 186 APPENDIX F 2017 AREOR Table 2 >, -g _ E g ~-Eg Un its Miles coo E [ M iles M il es ro o E 2/3 from E *-:, from from 8 Residence ::J 8 Gardens Other Specified Uses Sector LUC# U2/3 w _g 5 o LUC# U2/3 LUC# U 2/3 ,\4 :2 s n A R-A2 SON GS Camp Mesa 0.4 FTR 24 Cristian ito s Fire Sta tion 5 3 , 984 B C D E F G G-6 1315 S Ola Vista 4.6 0-2C SurfCamp.co m State Beach Surf Camp 2.3 did not o ccupv San Onofre Par k in 2012 Sectors H , J , K , L , M and N have no i dentified land uses. These sectors are p rim a ri ly the Pa cific Ocean and contain only a small portion of the plant s it e , and a beach walkway provid in g access for state beach par k users north & south of SONGS. p R-P5 Con tractor overnight parking 0.6 1040 in Lot 4 Q 11 Stat e Parks Ma in Offices 3.5 FTR 14 3 W San Anton i o 4.3 7 SORB Clubhouse (p ermanently closed per USMC) 16 147 W Jun i pero: 4.1 B USMC Exchanoe & Commissarv 1.7 2 , 000 G-6 1315 S Ola Vista 4.6 9 Basilone Road USMC Entrv Gate 2 520 G-16 432 Ave Crespi 3.8 12 San Mateo Campground 2.9 4 , 380 17 Beach Con cession (Pier Sha ck and Grill) 4.5 2 , 600 13 B each Con cession (Califia Beach Cafe) 3.9 1 , 200 R 20 Sea R i dge Estates 4.5 FTR G-17 788 Ave. Salvador 4.9 19 Camp San Mateo (STP#12) 3.7 2 , 000 !This is an emptv lotl R-R3 SONGS Drv Camping PL 12 0.7 2136 G-20 790 Ave. Salvador 4.9 21 Cristianitos USMC E ntry Gate 4.1 520 R-R2 SONGS Camp Mesa (See 0.4 FTR 23 Cristianitos USMC Gas S tation 4.1 2 , 000 notes for Table 1) Bold Text indicates a change from the 2016 LUC. Data as of 9-30-2017 FTR -Full Time Residence Page 187 APPENDIX F 2017 AREOR NOTES FOR TABLES 1 AND 2 RESIDENCES LUC# Description R-A1 CAMP SAN MATEO (barracks)-This is an employment and an FTR land use location for persons 17 and older. R-A2, CAMP MESA-Former FTR and is permanently closed. R-R2 R-C2 CAMP SAN ONOFRE FIRE STATION-This is an employment and FTR land use location for persons 18 and older R-C1 , CAMP SAN ONOFRE (barracks)-This is an employment and FTR land use locations for R-C3, persons 17 and older R-D1 R-E1 CAMP HORNO (barracks)-This is an employment and a FTR land use location for persons 17 and older R-G1 San Onofre State Park-(2) Camp Host Volunteers live FTR at campsites

1. 99-104. R-P1 COTTON POINT ESTATES-This is a FTR for all age groups R-P2 , SAN MATEO POINT HOUSING-This is a FTR for all age groups R-03 R-02, SAN ONOFRE Ill housing-This permanent housing development is a FTR for all age groups R-R1 R-P3, SAN ONOFRE RECREATION BEACH (SORB)-This is a FTR for SORB employees and R-05 campground hosts (age 18 & over). This is also a non-employment land use location (camping) for all age groups. A person or family may camp at SORB for a maximum of 60 days per calendar year VEGETABLE GARDENS Historically, several gardens have been identified on Avendia Salvador and documented in the Land Use Census. A drive by was conducted and the following was observed:

• Only a plot of land existed with an absence of a garden at 788 Avendia Salvador. Its designation was G-17. Since this plot of land has no garden, letters were sent to the owners at 786 Avendia Salvador and 790 Avendia Salvador addresses to verify any potential gardens.
• The owner at 786 Avendia Salvador in San Clemente located in Sector R, stated that a garden existed on the property. The newly identified garden was given the designation G-19.
• The owner at 790 Avendia Salvador stated that a garden no longer existed. This garden was given the designation G-20. Based on the updated information, Figure 4 was revised to reflect the current active gardens. Page 188 APPENDIX F 2017 AREOR OT H E R LUC LOCATIONS CLOSER THAN THE CLOSEST RESIDENCE LUC# Description 0-1 SAN ONOFRE STATE BEACH GUARD SHACK-this i s an employment land use location for persons 18 and older. 0-2 SAN ONOFRE BEACH CAMPGROUND

-Th i s is a non-employment (recreational) and use location for all age groups. 0-2A ENDLESS SUMMER SURF CAMP/CAMPGROUND HOST-The Endless summer Surf Camp and the State Parks Campground host are located in spaces 100 to 103. The maximum occupancy for persons age 18 and older is 4380 hours. The maximum occupancy for persons 17 and younger is 360 hours. This is both an employment and a non-employment land use l ocation. 0-2B YMCA Surf Camp 0-2C Summer Soul Surf Camp-Summer Soul Surf Camp is a day camp that takes place at Dog Patch beach in San Onofre Beach. The maximum occupancy for persons age 18 and o l der is 440 hours. The max i mum occupancy for 17 and younger is 40 hours. 0-3 STATE PARK OFF I CE TRAILER-This is an emp l oyment land use location for persons 18 and older. 0-5 CAMP HORNO MOTOR POOL-This is an employment land use l ocation for persons 17 and older. 0-6 SURF BEACH (LIFEGUARD) -This i s an e m ployment land use location for persons 18 and older. 0-8 CAMP SAN MATEO MOTOR POOL-This is an employment land use l ocation for persons 17 and older. 0-9 USMC CP SANITARY LANDFILL-This is a n employmen t land use location for persons 1 8 and older. 0-10 CAMP SAN ONOFRE WASTE WATER TREATMENT PLANT (STP #11 )-Th i s is an employment land use location for persons 18 and older. R-C2 SAN ONOFRE FIRE STATION #7 52 AREA-This is an employment land use location for persons 18 and older. 1A SORB CAMPGROUND CHECKIN-This is an emp l oyment land use location for persons 18 and older. 3 TRESTLES BEACH LOOKOUT TOWER-Th i s is an employment land use location for persons 18 and older. 5 SURF BEACH GUARD SHACK-Th i s is an emp l oyment l and use l ocation for persons 18 and older. 18 SORB LIFEGUARD TOWER-Th i s is an employment land use loca t ion for persons 18 and older. 22 SCE Land Uses-Are occupied by unmonitored SCE workers 31A BORDER PATROL CHECKPOINT -Th i s is an employment land use location for persons 18 and older. 31B HIG HW AY PATROL WEIGH STATIONS-These are employment land use locations for 32 persons 18 and o l der Page I 89 APPENDIX F 2017 AREOR Table 2 Notes: Table 2 locations are not mapped. The garden land uses listed in Table 2 do not exist (LUC #14 and LUC #16 gardens have been paved over and are no longer able to support vegetation growth). LUC G-6 and G-16 no longer have gardens on property. SONGS Camp Mesa is no longer a residence and is permanently closed. The " other specified uses" locations listed in Table 2 are further away from the midpoint of Units 2/3 that is closest to the full time residence (all age groups) in the corresponding sector. The residences listed in Table 2 are not the closest full time residence in the corresponding sector. The Table 2 locations have been retained for historical trending purposes and are not required by the ODCM. A review of the business need to continue including these locations was closed in March 2013 because these locations were used to track locations that in the past were input for R(i) tables' calculations and they need to remain in the LUC. Refer to NN (Nuclear Notification) 202232049. R-P5Contract Worker in Parking Lot 4-This was a 6 month residence for a contract worker that slept in personal vehicle in between shifts until 4/1/2013 (NN 202649118). This is an inactive residence. Page I 90 APPENDIX F 2017 AREOR Table 3 -Camp Pendleton Hunting Take Data. July 1 , 2016-June 30 , 2017 Deer Hunter Sm Game Hunter Area Effort Effort Deer Coyote Dove Quail Rabbit Sauirrel Pigeon H o urs Hours Alpha-1 B(3), C(3.2) 227 17 1 0 0 0 0 0 0 Alpha-2 E(0.8), D(0.8}, C(3) 93 25 2 0 0 0 0 0 0 Alpha-3 0(2.2) 60 320 0 0 0 23 11 6 0 Bravo-2 8(3.8), A(4.2) 77 145 1 0 0 1 2 0 0 Bravo-3 B(1.6}, A(1.8}, R( 1.8) 60 250 0 0 0 0 0 0 0 R ome o-1 E(1) 29 5 1 0 0 0 0 0 0 Romeo-2 E(2.6) 99 28 4 0 0 1 0 0 0 Romeo-3 E(1.4}, F(1.5) 88 52 3 0 0 4 0 0 0 Papa-2 & Tango F(5) 55 36 3 0 0 0 4 4 0 Totals 788 653 15 0 0 28 17 10 0 1. The t otal hunting hou r s includes t i me attributable to multiple i ndividuals. Th i s value bounds the maximally exposed i ndiv i dual. Page I 91 APPENDIX F 2014 II.and Use C,ens.us la.nd IJMS 4 ~onal & Recrnlional U-0 Unit& 2'J3 Miq)oint 0 ----..-....... -~-~ ... -*----o.e..-- --.. -*--~-.... ,....,...._._.....,. -*IO!foi-,.......,-Ql$ T-..0.. '°"ll"llt*...-.,~-~ l~~--~9.1'~ _...,.,. e.,,_... *-_...,& eo,._.., Ma;la -2017 AREOR Page j 92 APPENDIX F 5 , 0!D """"* Figure2 2016 Land Us@ CGnsus RP.s i rl 1 mr.P_~

• Residenc~

o Units 213 Midpoint 0 : 211 1 6 LlJQ..Fla=2~e s;l:lmcrs.n'JII Tu.ow>>". o..J:vuc:11 Ole 20 1 11 5 , 000 Feet Fa1w'<s d!eplcled r,,,re1n..., p J 111m , g ieve l aca:ncy , and 1ntendrd1<1r-.....,,,o1p~0111y. 0_.,,.,. _be ll"1a1rd atllllsscal e.--CCl'ISU'I wnn a:ie prq:1er axu m e na or acaenaes suc!lfteobr=.ORealP,ope,t=*M-and Gi a illomos -.. "'""' ts* reglslen!d-ar Ranod McNaly 2017 AREOR ,./ J Page I 93 APPENDIX F F i gure 4 2017 L and Use C ensus Gardens

• Gardens Greater than 500 SQ. ft. 0 Units 2/J Midpo i nt 0 0.5 M i les ,:iP, ......... ?1"1 1 7 1 ,.r._~v""'_r,;.~

nw d Ou: Tlur,d;ay. Seplem>er 14 , 2017 ~ealUrM Oepided hemn are puwu,g level accuracy. and intended lor nr..m.tional purposes ontv. Distances and locations ma,y i,., dislort2d at m S<:ille. AM.Ifs consult wih the .,._leoal doannents or --regarding such leaue:s. 0 Re.ol Pn,periies

• Mapping and G I S. Thomas Bros. Maps IS a regis-hdeman; ff Rand MdW'f ,. c....,....,,..

Repn,duocd -.. ......,,..... 8""""° by R.-,d McNaly-& ~-0 Rand .Mc:Naly & CCll!1)0nf. N. nght> re,erved , 2017 AREOR 5.mile radius...._ Sec t o E Page I 94 APPENDIX F Figure 5 2014 Land Use Census Other Uses 0 Units 2/3 Midpoint

• other Speafied Uses 0 0.5 Milas F"8 Na"'° 2014LUC_F,gu<e5_00,...__ ""d Dote Th..-Y , S,,,,00,.-

2~ 2014 F ... .,..~ he<-... pion<w,g -""""""' ond .......... fof ..,,,._.,nat ~Ofll)' O..nca ancr IDc:abonl tn1y be dtstorlld et th4 acale A~'f' coneutt _the_logal_n11cr_.....~ ...,. _,,_ ORNI Pl'-* Ma""'ng ondGIS T....,_B<oo,.,,.

• • reg--rt.o/Rand & ~nv R4'Pt0duotd......, peffffl,IH)n g,al"Nd i,y Rend -.Jty & eon-.,.ny ORand -& /J <,it,11 -2017 AREOR Page 195 20 17 AREOR APPENDIX G. ERRATA TO PREVIOUS AREORs Page I 96 Appendix G 2017 AREOR The 2 016 AREOR text references incorrect number of cross check samples and an incorrect acce p tance rate. Per the 2016 Annual Environmental Quality Assurance (QA) Report , GEL performed 501 ind i vidual cross check analyses representative of samples analyzed for SONGS. The accuracy of each result reported to Eckert & Ziegler Analytics , Inc. is measured by the ratio of GEL's result to the known value. Over 98% of the cross-check sample results were acce p table , which satisfies GEL's QA criteria. Page 197 2017 AREOR APPENDIX H. CDPH CO-LOCATED TLDs Page 198 Appendix H 2017 AREOR C DP H TLDs CO-LOC A TED W ITH R EMP TLDs DURING 2017 California Department of Public Health (CDPH) maintains a TLD program i n the environs of SO N GS. Per DPH (Department of Public Health) request, the results of CDPH dosimeters that are co-located with SONGS dosimeters are reported below. Table 3 6. 2017 Data from REMP TLDs (mR/ standard quarter) 1st 2nd 3rd Location Number Location Name Qtr. Qtr. Qtr. SCE-1, NRC-7, DPH #2 City of San Clemente 11 7 15 SCE-2, NRC -23, DPH #8 Camp San Mateo 13 9 16 SC E-3 , NRC-19, DPH #9 Camp San Onofre 10 8 12 SCE-6, DPH #10 Old El Camino Real (Old 4 3 5 Highway 101) (ESE) SCE-10, NRC-12, DPH #6 Bluff (Adjacent to PIC #1) (San 13 6 14 Onofre Surfing Beach) SCE-22, NRC 11 , DPH #4 Former US Coast Guard Station 14 10 14 -San Mateo Point SCE-34, NRC -14, DPH #5 San Onofre Elementary School 8 10 12 SCE-50, NRC 32 , DPH #13 Oceanside Fire Station 9 9 12 Note: Requirements in the standard Technical Specifications (TS) adopted under the TS Improvement Program i nclude reporting results of TLDs that are co-located with NRC dosimeters.

The NRC dosimeters were exchanged by the CDPH under contract with the NRC. Th is contract expired in December 1997 and the NRC TLDs were no l onger being deployed around SONGS. See App endix I of th e " 1997 Radiolog ica l Environmental Oper ating Report", April , 1998 The CDPH TLD results confirm that SONGS does not have a significant impact on di r ect radiation exposures in the environment. 4th Qtr. N/A 11 10 3 8 11 9 9 Page 199 --*------, 2017 AREOR APPENDIX I. ISFSI TLD DATA Page 1100 APPENDIX I 2017 AREOR Summary Per 1 O CFR 72.126, SONGS implemented an area monitoring TLD program in the vicinity of the ISFSI. In the fourth quarter of 2001, 21 pre-operational TLDs were deployed in the area around the ISFSI foundation then under construction. This pre-operational TLD data are compared to the data obtained after the commencement of used fuel storage in the ISFSI for the purposes of estimating the additional exposure attributable to the operation of the ISFSI. An evaluation of the entire REMP TLD database yielded an estimated background exposure rate o f approximately 15 mR/std. quarter (91 days). However , some local variability within the CAB / EAB is to be attributable to factors external to SONGS. Another variable for the measured exposure rate is transit exposure to and from the TLD lab. The transit exposure is variab l e and is corrected by the lab. Therefore, a comparison of pre-operational data and operational data needs to be considered in conjunction with a comparison of ISFSI TLD data and the estimated baseline background exposure rate within the EAB. Environmental exposure rates are variable and small changes in TLD location can measurably change the data. SONGS REMP TLD data show an environmental seasonal variability that does not appear to be related to any activities at SONGS. The ISFSI TLD data gathered to date appears to follow a similar seasonal variability (Figure 14). In addition to environmental factors, some non-lSFSI work activities at Unit 1 have elevated the pre-operational measured ISFSI TLD e x posure. The storage and transport of radioactive materials and waste near the location of the ISFSI founda t ion area in 2001 and 2002 appears to have elevated the exposure rates of TLDs 306 to 315. I n addition, the movement of the Unit 1 reactor vessel in October 2002 caused a noticeable increase in the measured exposure for TLDs 301 to 315. The measured exposure rate for the ISFSI TLDs close to the ISFSI is consistent with the exposure rate expected from known radiological work activities. The elevated exposure rate from TLDs 301, 302, 303, 304 , 323 , 324, 325 , 326 , 327 and 328 is primarily due to the movement and storage of used fuel at the ISF S I. In the second quarter of 2011 additional TLDs 327 and 328 were placed along the fence on the southwest side of the ISFSI. These TLDs routinely have the highest measured doses , as they did in 2017. These locations, however, are not accessible to members of the public. Publicly accessible REMP TLDs include SCE-55 , SCE-56 and SCE-57. Only SCE-55 (San Onofre State Beach) recorded measurable dose, at approximately 14 mrem/yr. In 2016, additional ISFSI TLD locations were added immediately along the fence and seawall south and west of the ISFSI: Locations SCE-339 , 340, 341, 342 , 343 and 344 (see Figure 13). Starting in the fourth quarter 2010 neutron dosimeters were placed in ISFSI TLD canisters 311, 324, 325, and 326. In the second quarter 2011 neutron dosimeters were also placed adjacent to TLDs 327 and 328. Beginning in the 4 th quarter of 2016, neutron TLDs were co-located with locations SCE-339 through SCE-343. The neutron TLDs were added to obtain neutron informati o n prior to the off load of spent fuel from Units 2 and 3. The 201 7 neutron TLDs identified measurable levels of neutron radiation from spent fuel in storage. A dose equivalent conversion factor for the TLD neutron signal of 10.5 mrem/mR neutron h as been applied, based on a similar ISFSI facility at another site. It is being applied to the SONGS TLD results only to provide an estimate of the neutron dose equivalent being measured. The neutron dose is not significant, and has been included in the quarterly results for these locations in Table 37. Page I 101 APPENDIX I 2017 AREOR Neutron exposure during fuel transfer is measurable at the fence surrounding the storage facility at low levels , estimated to be less than 3 mrem per quarter. These measurements demonstrate that the neutron exposure is bounded by the projected neutron dose rates in calculation SCE-23-0508 , is well within the limits specified in 1OCFR72.104 (0.25 mSv (25 mrem) to the whole body, 0. 75 mSv (75 mrem) to the thyroid and 0.25 mSv (25 mrem) to any other critical organ , and is cons i stent with known ISFSI rad i ological conditions. The measured ISFSI gamma TLD exposure rates were also determined to be consistent with the calculated ISFSI dose rates and know n rad i ological conditions. The r e sults from all locations at the fence around the ISFSI pad show that a member of the public , if at those locations and adjusted for occupancy pe r SDS-RP1-PCD-1007 , is less than 2 mrem per year , well below regulatory limits. Page 1102 APPENDIX I 2017 AREOR Tab l e 3 7. 20 17 ISFSI T L D Data 301 15.8 18.0 18.0 17.1 17.5 ND ND ND ND 70.6 ND ND 302 15.8 21.1 21.6 19.8 19.4 5.3 5.8 ND ND 81.9 18.9 1.1 303 15.8 21.1 20.8 1 9.7 20.5 5.4 5.0 ND ND 82.1 19.0 1.1 304 15.8 20.7 20.4 19.2 19.5 ND ND ND ND 79.8 16.7 1.0 306 15.8 21.0 20.8 1 9.1 19.2 5.3 5.0 ND ND 80.2 17.1 1.0 307 15.8 17.5 16.6 15.4 15.4 ND ND ND ND 64.9 ND ND 308 15.8 19.4 19.3 17.6 18.4 ND ND ND ND 74.7 11.6 0.7 309 15.8 19.9 20.4 18.9 18.2 ND ND ND ND 77.5 14.4 0.8 310 15.8 20.3 20.5 18.5 19.2 ND ND ND ND 78.4 15.3 0.9 311 ISFSl-01 c 15.8 19.5 20.1 18.5 17.8 ND ND ND ND 75.8 12.7 0.7 312 15.8 14.8 15.1 14.8 13.8 ND ND ND ND 58.6 ND ND 314 15.8 19.4 20.0 1 9.6 18.8 ND ND ND ND 77.8 14.7 0.8 315 1 5.8 19.2 19.0 1 8.9 17.5 ND ND ND ND 74.6 11.6 0.7 316 15.8 15.5 16.0 1 4.8 14.8 ND ND ND ND 61.0 ND ND 317 15.8 16.0 16.5 15.0 15.1 ND ND ND ND 62.6 ND ND 318 e 15.8 18.4 19.1 18.4 1 7.4 ND ND ND ND 7 3.2 10.1 0.6 319 e 15.8 18.7 20.6 18.8 17.4 ND ND ND ND 75.6 12.6 0.7 320 e 15.8 18.2 18.9 18.2 17.7 ND ND ND ND 73.0 ND ND 321 e 15.8 19.3 19.3 1 9.4 17.4 ND ND ND ND 75.4 12.3 0.7 322 15.8 1 6.8 18.4 17.1 16.3 ND ND ND ND 68.6 ND ND 323 1 5.8 20.3 20.1 1 9.4 1 9.0 ND ND ND ND 78.9 15.8 0.9 324 ISFSl-04 c 15.8 23.9 25.0 23.1 21.7 8.1 9.2 7.3 5.9 93.7 30.6 1.7 325 ISFSl-03 c 15.8 23.8 26.5 26.2 22.4 8.0 10.8 10.4 6.6 98.9 35.8 2.0 326 ISFSl-02 c 15.8 24.7 22.5 22.7 19.2 8.9 6.7 6.9 ND 89.1 26.0 1.5 327 ISFSl-05 c 15.8 43.4 48.7 44.5 49.2 27.6 32.9 28.8 33.4 185.8 122.7 7.0 328 ISFS l-06 c 15.8 44.8 49.3 34.0 36.1 29.0 33.6 18.2 20.3 164.1 101.0 5.8 339 ISFS l-08 c 15.8 20.0 20.7 19.2 19.4 ND ND ND ND 79.2 16.2 0.9 340 ISFSl-09 c 15.8 18.7 19.4 17.5 18.3 ND ND ND ND 73.9 10.9 0.6 341 ISFSl-10 c 15.8 19.7 21.6 18.6 18.9 ND 5.8 ND ND 78.8 15.7 0.9 342 ISFSl-11 c 15.8 21.3 21.6 20.0 20.0 5.6 5.9 ND ND 83.0 19.9 1.1 P a ge I 103 APPENDIX I 2017 AREOR .. . . ..................

---

==**-...... ,,,.. .. ,.. **-**=-==--*=.-*1

... "'~ '"""~, v'"" "' ),~,..,~,,,,.,,-,.:.;..,._":I..._ ~:>:,.,. -,,.-:.. ... "',*)'""" ",,.. ~~-:r-1;:; "¥<-~'>:."..::"~ ~,,_,i:;,t,'\.1-;.~~v"~~'f't*-'i~1:1 ~i!~ --~------~--. -**. *-------~. ,_.*'. ;{!{ . , .. '. , ..*.... :: *: :~*** ~/?;'.~ ;_:;J.t 11?.: :iii .. 343 ISFSl-12 c 15.8 21.4 22.5 18.9 20.9 5.6 6.7 ND 5.1 83.7 20.6 1.2 344 1 5.8 20.3 20.0 17.8 17.0 ND ND ND ND 75.1 12.0 0.7 San Onofre State 55 Beach (U 1 West) 15.8 18.6 18.3 1 8.3 18.6 ND ND ND ND 73.8 10.7 0.4 ISFSl-0 7 c 56 San Onofre State 15.8 15.4 1 7.6 1 5.1 1 7.2 ND ND ND ND 65.3 ND ND Beach (U 1 West) 57 San Onofre State 15.8 Beach (Un i t 2) 16.7 17.7 1 6.6 1 6.9 ND ND ND ND 67.9 ND ND Notes: a. IS F SI TLDs are placed around the ISFSI pad , and not in locat i ons access i ble t o the general publ i c. b. Publ i c dose i s based on the ind i vidual location occupancy as specified i n SDS-RP1-PCD-100

7. c. Stat i on i ncludes neutron dose , es ti ma t ed u sing a neutron s i gnal (R n) co nv e r s i on fac t o r o f 1 0.5*R ,Jr e m (HPSTID 08-015) d. 1.05 1 m rem/mR from ANSI N 13.3 7-2 01 4 , S e c ti o n 3.2.1 e. T h es e TLDs are publ i cl y ac ce s si ble. Page 1104 APPENDIX I Figure 6-2 ISFSI TL D S a nd S<e l e ctecl REMP T L D e n ear t he ISFSI Foundat i o n + 1 SFS 1 , Vea ..t. I S F S I. N o T LD , Yes --Seawa ll lF e n~l ine --M ajo r R oad::i -Railroad 1W O l UU -=-c::,-====

Hi ~--->>ISMOV~11.._,..,., """'~~~t;I °"" 71ir.ut4 lllarocl.uldlltil_,,....,.._.._,l:N TN:WM U:Cl!l 11 ... a .T""""9, 9'9' ._. il f~t ...... ... ,.u. dlllpk:tad ..... " -pilnw f'II , .... m:a.nty , 111d .. #Wlilff'#l ,...,.,_liW.M,w..,.,_.N.Ja, nll,i* n.air la dO t tJid Iii I t. &'Ill& ,.,.,. a::U aJ I .,j t, lh* Pf'CIIJW .,doc.Ult,.. Ot*Olffilll ,....,"w.KIJ .. .., ... c a-..'"---~ .. d~rae.ci m. I Indicates historical TLD locations that are no longer used F i gure 13 -SONGS ISFSI and Selected REMP TLD Loca t ions 2017 AREOR :33 33 4 7 9 3 4 4 4 317 42 31B $7 319 3 4 4 4 3 4 4 33 4 4 4 Page 1105 APPENDIX I .:: .. CT 30 25 20 .,; 15 t; ..... a:: E 10 5 0 ISFSI and REMP TLDs -DR 31 (Control) -DR 321 (ISFSI) -DR 56 (EAB) -DR 318 (ISFSI) DR 55 (EAB) -DR 59 (EAB) 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Figure 14 -ISFSI and REMP TLDs 2017 AREOR Page 1106

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~ APPENDIX J 20 1 7 AREOR APPENDIX J. OFFSITE GROUND WATER SAMPLING Page I 107 APPENDIX J 2017 AREOR Offsite Drinking Water Data All investigations have shown that there are no drinking water pathways at SONGS. Figure 15 below illustrates groundwater well locations along with the flow of the groundwater.

The operation of SONGS had no impact on drinking water wells in the vicinity of SONGS. SONGS Drinking Water Walls I S.c-to.rH w S.Cto r P WNW helot M WSW SktOf'l: SW Figure 15 -Closest Drinking Water Wells ... Page 1108 Glossary a posteriori a priori ALARA Cosmogenic nuclides After the fact Before the fact 2017 AREOR As Low As is Reasonably Achievable means making every reasonable effort to maintain exposures to radiation as far below the dose limits in this part as is practical consistent with the purpose for which the licensed activity is undertaken, taking into account the state of technology, the economics of improvements in relation to state of technology, the economics of improvements in relation to benefits to the public health and safety, and other societal and socioeconomic considerations, and in relation to utilization of nuclear energy and licensed materials in the public interest. Radionuclides (or isotopes) created when a high-energy cosmic ray interacts with the nucleus of an atom. These isotopes are produced within Earth materials such as rocks or soil, in Earth's atmosphere, and in extraterrestrial items such as meteorites. Radioactive isotopes beryllium-? and beryllium-10 fall into this series of three light elements (lithium, beryllium, boron) formed mostly[citation needed] by cosmic ray spallation nucleosynthesis , both of these nuclides have half-lives too short for them to have been formed before the formation of the Solar System , and thus they cannot be primordial nuclides. Since the cosmic ray spallation route is the only possible source of beryllium-? and beryllium-10 occurrence naturally in the environment, they are therefore cosmogenic. Below is a list of radioisotopes formed by the action of cosmic rays in the atmosphere; the list also contains the production mode of the isotope. Isotope Mode of formation 3 H (tritium) 14 N (n, 12C)3H 7 Be Spallation (N and 0) 10 Be Spallation (N and 0) 11c Spallation (N and 0) 14 c 14N (n, p) 14 c 1aF 18 0 (p, n)18 F and Spallation (Ar) 22 Na Spallation (Ar) 24Na Spallation (Ar) 2a Mg Spallation (Ar) 31 Si Spallation (Ar) 32 Si Spallation (Ar) 32 p Spallation (Ar) 34m c1 Spallation (Ar) 35 S Spallation (Ar) 36 CI 35 CI (n, y)36 CI 37 Ar 37 CI (p, n)37 Ar 3a CI Spallation (Ar) Page I 109 Decay Series Distinguishable from background Dose fCi/m 3 Half-life Gamma Spectroscopy 2017 AREOR 39 Ar 38 Ar (n , y)39 Ar ,_ ---39 CI 4 0 Ar (n , np)39 CI & spallation (Ar) ,_ --41 Ar 40 Ar (n , y)41 Ar ...._ a1 Kr 8°Kr (n , y) 81 Kr There are three naturally occurr i ng decay ser i es of heavy elements that transform into a series of various radioactive elements by releasing energy in the form of particles , (such as alpha or beta), and/or gamma rays to end in a stable form of non-radioactive Lead. All three decay series start with extremely long lived radioactive, heavy elements that can be measured in geologic time units. They are Uranium-238 with an approximate half-life of 4.5 billion years, Uranium -235 with a half-life of about 700 million years , and Thorium-232 with a half-life of 14 billion years. All three series contain some more well-known radioactive species , Radium and Radon. Detectable concentration of a radionuclide that is statistically different from the background concentration of that radionuclide in the vicinity of the site or , in the case of structures , in similar materials using adequate measurement technology , survey , and statistical techniques. The amount of radiation that is absorbed by a person's body. In the radiation field the term dose is sometimes used interchangeably with dose equivalent, which i s defined as the rem and described below. acronym for a femto-curie per cubic meter, wh i ch is a concentration unit that defines how much radioactivity is present in a particular air volume , such as a cubic meter. A curie , named after its discoverers Pierre and Marie Curie, is defined as the rate at which a radioactive element transforms itself into another element that is most often another radioactive element. It is mathematically equiva l ent to 37 billion disintegrations or transformations per second. A " femto" is a scientific prefix for an exponential term that is equivalent to one quadrillionth (1/1,000 , 000 , 000,000,000). A measure of how fast half the mass of a radioactive element will transform itself into another element. Each radioactive element has its own unique rate of transformation. Consequently , if a radioactive element , such as lodine-131 has a half-life of 8 days, then in 8 days half of the original amount of lodine-131 will be gone; in another 8 days half of that half will be left and so on. A scientific method used to analyze gamma rays emanating from radioactive elements. The analytical system determines the gamma ray energy which acts as a " fingerprint" for specific radioactive materials. For example , Potassium-40 (K-40) has a very , distinctive gamma energy at 1460 keV. This uniqueness allows the instrument to positively identify the K-40 1460 energy as its own unique fingerprint. A keV is an abbreviation for kilo electron volt, which is a measure of energy at the atomic level. A kilo is a scientific prefix for the multiplier 1 , 000. Page 1110 Gross Beta Liquid Scintillation Millirem (mrem) milliRoentgen (mR) pCi/kg pCi/L Rem Roentgen Skyshine Thermolu minescent Dosimete r s (TLD) 2017 AREOR A simple screening technique employed to measure the total number of beta particles emanating from a potentially radioactive sample , with higher values usually indicating that the sample contains natural and/or made radioactive elements. High values would prompt further analyses to identify the radioactive species. A beta is a negatively charged particle that is emitted from the nucleus of an atom with a mass equal to that of an orbiting electron. An analytical technique by which Tritium and many other radioactive contaminants in water are measured. A sample is placed in a special glass vial that already contains a special scintillation cocktail. The vial is sealed and the container vigorously shaken to create a homogeneous mix. When the tritium transforms or decays it emits a very low energy beta particle. The beta interacts with the scintillating medium and produces a light pulse that is counted by the instrument. Although a different scintillation cocktail is used , this is basically how radon in well water is measured. one thousandth (1/1000) of a rem. one thousandth (1/1000) of a Roentgen an acronym for a pico-curie per kilogram , which is a concentration unit that defines how much radioactivity is present in a unit mass , such as a kilogram. A " pico" is a scientific prefix for an exponential term that is equivalent to one trillionth (1/1 , 000 , 000,000 , 000). an acronym for a pico-curie per liter, which is a concentration unit that defines how much radioactivity is present in a unit volume , such as a liter. an acronym for roentgen equivalent man. It is a convent i onal unit of dose equivalent that is based on how much of the radiation energy is absorbed by the body multiplied by a quality factor , which is a measure of the relative hazard of energy transfer by different particles , (alpha , beta, neutrons , protons, etc.), gamma rays or x-rays. In comparison the average natural background radiation dose equivalent to the United States population is estimated to be 292 millirems per year , or 0.8 millirem per day, with 68 % of that dose coming from radon. A millirem is one thousandth, (1/1000), of a rem. a special unit of exposure named after the discoverer of X-Rays , Wilhelm Roentgen. It is a measure of how much ionization is produced in the air when it is bombarded with X-Rays or Gamma Rays. Ionization is described as the removal of an orbital electron from an atom. is radiation from a radioactive source that bounces off air molecules in the sky, much like a cue ball does off the banking of a billiard table , and is scattered/redirected back down to the earth. very small plastic-like phosphors or crystals that are placed in a small plastic cage and mounted on trees , posts , etc. to absorb any radiation that impinges on the material. Special readers are then used to heat the plastic to release the energy that was stored when the radiation was absorbed by the plastic. The energy released is in the form of invisible light and that light is counted by the TLD reader. The intensity of the light emitted from the crystals is directly proportional to the amount of radiation that the TLD Page 1111 Site Area Boundary (SAB) Tritium (Hydrogen-3 or H-3) 2017 AREOR phosphor was exposed t o. SONGS SAB is defined as that line beyond which the land is not owned, leased , or otherwise controlled by the licensee; from ODCM definition. a special name given to the radioactive form of Hydrogen usually found in nature. All radioactive elements are represented as a combination of their chemical symbol and their mass number. Therefore , Tritium, which is a heavy form of the Hydrogen molecule with one proton and two neutrons i n the nucleus of its atom , i s abbreviated and represented by its chemical symbol , H , for Hydrogen and 3 for the number of particles in its nucleus , or mass number. Similarly , other radioactive elements , such as Potassium-40 , can be represented and abbreviated as K-40 , and so on Page 1112 2017 San Onofre Nuclear Generating Station Annual Radiological Environmental Operating Report E U DISORN License Numbers: DPR-13, NPF-10, NPF-15 An ED I SON INTERNATIONAL 1 Company April 2018 Prepared by: Chesape ke N dear Service m =i

• I L aboratories LLC a member of The GEL Group INC 2017 AREOR This 2017 Annual Radiolog i cal Environmental Operating Report (AREOR) for the San Onofre Nuclear Generating Station (SONGS) fulfills the requirements of Technical Specifications (TS} Section §D6.9.1.3 of SONGS Unit 1 License DPR-13 , Section §5.7.1.2 of the permanently defueled SONGS Un i ts 2 and 3 Licenses NPF-1 0 and NPF-15, respect i vely , and the Independent Spent Fuel Storage Installat i on (ISFSI) facility. The 2017 AREOR covers the results of the environmental monitoring performed around SONGS dur i ng the ti me period January 1 , 2017 through December 31 , 2017. Page Ii 2017 AREOR Table of Contents 1 Executive Summary ...............

............................... ................ ........................ ............. .......... 1 2 Radiological Environmental Monitoring Program .............................. .................................... 2 2.1 Program Overview ..................... .............................. ................. ................................... 2 2.2 Site Area and Description ................................ ............................. ................ ............... 3 2.3 Sample Collection and Analyses ................................................................................. 6 2.3.1 Detection Limit Terminology ................................ ...................... .......................... 7 2.4 Regulations and Guidance ...................................... .................................................... 8 2.5 NRC Reporting Levels ...................... ..................... ................................... .................. 10 2.6 Summary of Analysis of Results and Trends .................................... ............ .............. 10 3 Land Use Census ........................ .......................... ..................... ........................ ................. 12 4 Quality Assurance ............................................................................. ................. ............. .... 12 5 Program Deviations .............. .................................... .................... .................... ........... ........ 13 6 Conclus i on ............................................ .................... .......................................................... 13 7 Re f erences ............................... ..................... ...................................................................... 13 APPENDIX A. SAMPLE TYPE AND SAM PUNG LOCATIONS ................................................. 14 APPENDIX B. RESULTS AND DISCUSSIONS OF 2017 ENVIRONMENTAL DATA ................ 26 A. Results and Discussions of 2017 Environmental Data ................................................... 28 1. Direct Radiation ...................... ....................... ................................... .................... 28 2. Airborne Particulate, Iodine , and Composite Isotopic Analyses .................... ......... 33 3. Ocean Water .................................................... ........... ........................ ................. 34 4. Drinking Water ......................................................................................... ............. 34 5. Shoreline Sediment (Beach Sand) ...................... .................................................. 34 6. Ocean Bottom Sediments ......................................... .............................. .............. 34 7. Marine Species (Flesh) ........................................ ................................................. 35 8. Local Crops .................... .......................... ............................. ............ ................... 35 9. Soil ........................... .................. ..................... ................................................... .. 35 10. Kelp ..................................... ................. ................................................. ............... 36 Page I ii 2017 AREOR 11. Correlation of Effluent Concentration to Concentrations in the Environment ......... 37 B. Statistical Summary of REMP Data For 2017 ................. ............................................... 39 APPENDIX C.

SUMMARY

OF QUALITY CONTROL PROGRAMS ...................... ........... ........ .45 A. Summary ................... ............................ ........................................ ................................ 46 B. Quarterly Duplicate TLDs ......................... .................................................. .......... ........ .46 C. Annual Duplicate TLDs .................................................................................................. 46 D. Calibration of Air Sampler Volume Meters .............................. ................................ ...... .46 E. lnterlaboratory Cross-Check Program: ......................................................................... .47 F. Analytical Laboratory Cross Check Program Summary ................................................ .48 APPENDIX D. COMPARISON OF OPERATIONAL TO PREOPERATIONAL DATA ................. 67 A. Direct Radiation .............................................................. ..................... .......................... 69 8. Airborne Particulates ............... ................................................................................... ... 69 C. Radioiodine ................ ................................................ ................................................... 70 D. Ocean Water .......................... ..................................................... .................................. 70 E. Drinking Water .......................................... ................. ........... ......................................... 71 F. Shoreline Sediments (Sand) ....................................................... ................................... 71 G. Ocean Bottom Sediments ................................ ................ ......................... ..................... 72 H. Marine Species (Flesh) ................................................... ........................................ ....... 73 I. Local Crops ................................................................ ................................ ........... ........ 74 J. Soil .................................... ............................................................................................ 75 K. Kelp .................................. ...................... .............. .......................... ................... ............ 75 APPENDIX E. DEVIATIONS FROM ODCM SAMPLING REQUIREMENTS IN 2017 ................ 77 A. Direct Radiation .................................................. .......... ................. ................. ............... 78 B. Air Sampling .............. ..................................................... ....................... ........................ 78 C. Ocean Water Sampling .............................................................................. ............ ....... 78 D. Dr i nking Water ............................................................................................................... 79 E. Shoreline Sediments ................................................................................ ..................... 79 Page I iii 2017 AREOR F. Ocean Bottom Sediments .................................................... .......................................... 79 G. Marine Species (Flesh) ............... ........................................ ........................................... 79 H. Local Crops ................................................................................................................... 79 I. Soil .............................................................. .................................................................. 79 J. Kelp ............................................................................................................................... 79 APPENDIX F. LAND USE CENSUS ......................................................................................... 80 Introduction .................. ....................................... ................................................................ 81 Executive Summary ............. ................................................................. ...................... 81 Definition of Uses ....................................................................................................... 81 The Land Use Census Scope ..................................................................................... 82 Re s earch Methodology .................... ................................................................................... 82 Field Research .................................................................... ....................................... 83 Data and Methodology Summary ............ ................................................................... 83 Documentation Spreadsheet ......................................... ............................................. 83 2017 Land Use Census Observations and Changes ........................................................... 83 Chemical and Toxic Waste ................. ........................................................................ 84 Milk Animals ............................................................................................................... 84 Meat Animals .............................................................................................................. 84 Growing Season for fleshy and leafy vegetables ........................................................ 84 Desalination Plant in Carlsbad , California ............ ....................................................... 84 Summary of Changes ................................................................................................. 84 APPENDIX G. ERRATA TO PREVIOUS AREORs .................................................................... 96 APPENDIX H. CDPH CO-LOCATED TLDs ............................................... ..................... ........... 98 APPENDIX I. ISFSI TLD DATA. .................... ......................................................................... 100 APPENDIX J. OFFSITE GROUND WATER SAMPLING ........................................................ 107 Page I iv 2017 AREOR Figures Figure 1 -Examples of Exposure Pathways ....................................... ........... .................. 3 Figure 2 -SONGS 45 mile REMP Radius .................................................... ................... 4 Figure 3 -SONGS Location ............................................... ............................................. 5 Figure 4 -SONGS REMP One Mile Radius ................... ................. .............................. 21 Figure 5 -SONGS REMP Two Mile Radius .................. ....................................... ......... 22 Figure 6 -SONGS REMP Five Mile Radius .................................................................. 23 Figure 7 -SONGS REMP 30-mile Radius North .................. .................... ..................... 24 Figure 8 -SONGS REMP 45-mile Radius South ............... ............................... ............ 25 Figure 9 -SONGS REMP TLD data through 2017 .................. ..................................... 29 Figure 10 131 in Aquatic Kelp ...................................... ...................... ....................... 36 Figure 11 -Kelp Sampling Locations .................. ................... ................. ........... ............ 37 Figure 12 -Monthly Average Airborne Particulate Gross Beta Preoperational and Operational Data for Units 2 and 3, (1976 -1988) ..................................... 70 Figure 13 -SONGS ISFSI and Selected REMP TLD Locations ................................. 105 Figure 14 -ISFSI and REMP TLDs .................................. ................................... ........ 106 Figure 15 -Closest Drinking Water Wells ............. .......................... ............. ............... 108 Page Iv Acronyms AREOR CAB CDPH CEAL DOE EAB EPA ISFSI LLD LUC MDC MDD ND NEI NRC ODCM QA QC REMP SAB TLD Annual Radiological Environmental Operating Report Controlled Area Boundary California Department of Public Health Contracted Environmental Analysis Laboratory Department of Energy Exclusion Area Boundary U.S. Environmental Protection Agency Independent Spent Fuel Storage Installation Lower Limit of Detection Land Use Census Min i mum Detectable Concentration Minimum Differential Dose Not Detectable Nuclear Energy Institute U.S. Nuclear Regulatory Commission Offsite Dose Calculation Manual Quality Assurance Quality Control Radiological Environmental Monitoring Program Site Area Boundary Thermoluminescent Dosimeter 2017 AREOR Page I vi 2017 AREOR 1 Executive Summary On June 12, 2013 , Southern California Edison notified the Nuclear Regulatory Commission (NRC) that it had permanently ceased operation for both Units 2 and 3 on June 7, 2013. While all power operations have ceased, spent fuel remains stored on site. San Onofre Nuclear Generating Station (hereafter referred to as San Onofre or SONGS) continues to fulfill its regulatory commitment to monitor the environment and potential exposure pathways. The REMP verifies that San Onofre has had no radiological impact to the surrounding environment or people and that it is within applicable state and federal regulations. The Radiological Environmental Monitoring Program (REMP) includes the sampling of environmental media and measuring radiation levels in the environment surrounding SONGS. Its purpose is to identify any levels of radioactivity or radiation associated with SONGS that have a potential exposure to a member of the general public. This is accomplished through the measurement of direct radiation and by the sampling and analyses of various environmental media, including:

• soil
• shoreline sediment (beach sand)
• air (particulate

& iodine)

• local crops
• non-migratory marine species
• kelp
• drinking water
• ocean water
• ocean bottom sediments Samples are analyzed for both naturally occurring and SONGS plant-related radionuclides.

A detailed description of the 2017 sampling locations and location maps are included in Appendix A of this report. An independent assessment of environmental impact is performed by the California Department of Pub l ic Health (CDPH) through the collection and analysis of samples, placement of dosimeters and collection of air samples. In addition , the site participates in onsite and offsite inspec t ions. This report describes the REMP conducted at San Onofre and covers the period from January 1, 2017 through December 31 , 2017. The REMP produces scientifically defensible data demonstrating no observable radiological environmental impact from SONGS. This report fulfills applicable license commitments, as described in DPR-13, NPF-10, NPF-15 , and the Offsite Dose Calculation Manual (ODCM). The REMP data collected during 2017 , as in previous years , continues to be representative of background levels. The data is summarized in the Statistical Summary of REMP Data found in Appendix B. The radionuclides cesium-137 (Cs-137) in soil and iodine-131 (1-131) in kelp were detected above the minimum detectable concentration (MDC), with the Cs-137 being attributable to fallout from nuclear weapons testing and the Fukushima Daiichi accident in Japan and the 1-131 associated with medical administrations. These isotopes have been detected at indicator locations , as well as at control locations, in past years. Naturally occurring radionuclides, including beryllium-? (Be-7), potassium-40 (K-40), thorium-228 (Th-228) and thorium-230 (Th-230) were detected in both control and indicator locations at similar Page 11 2017 AREOR concentrations and are not related to the operation of SONGS. Refer to Appendix B for a more detailed discussion. There is a natural and manmade radiation background. Natural background is comprised of the terrest r ial and cosmic radiation sources while manmade background results from past weapons testing fallout and routine medical applications. Prior to the construction of SONGS, environmental samples and measurements were collected and analyzed to determine the baseline natural radiation levels. The results from the indicator stations are compared to this pre-operational data , as well as control samples , to evaluate if changes in any radiation levels can be attributed to SONGS or other causes such as natural variations in the environment or manmade contributions. In summary, the environmental monitoring data collected during 2017 supports a conclusion of no adverse effect on the population or the environment from SONGS. The radiation exposures to peo p le living in the surrounding area from SONGS remains less than 2 mrem per year , which is a small fraction of the radiation exposures in the environment from the natural background from terrestrial and cosmic radiation. 2 Radiological Environmental Monitoring Program 2.1 Program Overview A key p urpose of the REMP is to characterize the radiological environment outside of the power block, providing data for assessing potential radiological impact resulting from the decommissioning activities for SONGS Units 2 and 3. It is designed and conducted:

• to detect any significant increase in the concentration of radionuclides in the pathways of exposure to the public ,
• to detect any significant change in ambient gamma radiation levels, and
• to fulfill the radiological environmental monitoring requirements of the ODCM. Expos u re pathways are the different routes by which people can potentially be exposed to radiation or radioactive materials. The pathways may be characterized into four general types, shown below along with a brief description of the monitoring as performed at SONGS:
• AIRBORNE. The airborne pathway represents the inhalation intake of airborne radioactive materials. This pathway is sampled in areas around SONGS by continuously drawing air through specialized filters and charcoal cartridges 24 hours a day, 7 days a week. Although both units at SONGS have been shut down since January 2012 , these air samples continue to be collected on a weekly basis.
• WATERBORNE.

The waterborne pathways include the exposure to radioactive materials accumulated in aquatic biota (fish, shellfish) and in shoreline sediments. These pathways are assessed through the collection of fish and shellfish samples in the environment around the plant. Sediment samples are also collected to evaluate any long-term buildup in the environment.

• INGESTION. The ingestion pathway includes broadleaf vegetation, agricultural products, and food products.

Atmospheric releases from the plant can deposit on these food products , represent i ng an intake exposure pathway through the consumption of these food products. Samples of crops (e.g., tomato , lettuce , sorrel) are collected from the local area around the plant to evaluate any impact on this pathway. Page 12 2017 AREOR

• DIRECT RADIATION.

The direct radiation pathway represents the external exposure from sources on the plant site and directly from any radioactive effluents released to the air or water. This direct environmental radiation dose is measured through the use of direct measurement dosimeters, such as thermoluminescent dosimeters (TLDs) or optically stimulated luminescence dosimeters (OSLs) that are placed around the plant site and in the local environment. Figure 1 -Examples of Exposure Pathways 2.2 Site Area and Description San O n ofre Nuclear Generating Station is located next to San Onofre State Beach, adjoining Camp Pendleton Marine Corps Base, in San Diego County, 64 miles south of Los Angeles, California. At this time there are no operating reactors, but in the past, there were three operat i ng pressurized water reactors with a total rated capacity of 2664 net megawatts electrical. Page 13 2017 AREOR Figure 2 -SONGS 45 mile REMP Radius Unit 1, rated at 410 net megawatts electrical, was supplied by Westinghouse Electric Company. Unit 1 b egan commercial operation on January 1 , 1968. The unit was permanently shut down on No v ember 30 , 1992, and has been decommissioned. By August 31 , 2004 , all fuel was transferred to the Independent Spent Fuel Storage Installation (ISFSI). By November 29 , 2006 , all remaining monitored effluent pathways were permanently removed from service or routed to Unit 2 d ischarge to the outfall. Unit 1 is owned by Southern California Edison (80%) and San Diego G as and Electric (20% ). Unit 2 a nd Unit 3 were supplied by Combustion Engineering, Inc., with turbine generators supplied by G.E.C. Turbine Generators , Ltd., of England. The units began commercial operation on August 18, 1983, and April 1 , 1984, respectively , a n d were rated at 1127 net megawatts electrical each. The twin units are owned by Southern California Edison (78.21%), San Di e go Gas and Electric (20% ), and the City of Riverside ( 1. 79% ). Page 1 4 n t a M of'Nea M ot1ntailta

• , rional ecreation A rea M a li bu Se nta C a l * * ,.,_ P&cific O n Fig u re 3 -SONGS Location 2017 AREOR @ Effecti v e December 29, 2006 , the City of Anaheim transferred its ownership interests in San Onofre Units 2 and 3 and the entitlement to the Units 2 and 3 output to Southern California Edison Company , except that it retains its ownership interests in its spent nuclear fuel and Units 2 and 3's independent spent fuel storage installation located on the facility's site. In addition, the Cit y of Anaheim retains financial responsibility for its spent fuel and for a portion of the Units 2 and 3 decommissioning costs. The City of Anaheim remains a licensee for purposes of its retaine d interests and liabilities.

Southern California Edison notified the Nuclear Regulatory Commission (NRC) on June 12, 2013, that it had permanently ceased operation of Units 2 and 3 on J u ne 7 , 2013. The NRC notification , called a Certification of Permanent Cessation of Power Operations , sets the stage for SCE to begin preparations for decommissioning. Page 15 l 2017 AREOR 2.3 Sample Collection and Analyses Sampl e s of environmental media were obtained to meet the stated objectives. The selection of sampl e types was based on established important pathways for the transfer of radionuclides through the environment to exposures to individuals. Refer to Appendix A for a complete list of REMP sample locations as described in Table 5-4 of the ODCM. Sampling locations have been selected , considering t he local environmental characteristics , i ncluding meteorology , land use and water use data. Two types of sampling locations are define d. The first type , representing control stations , is located in areas that are beyond the measu r able influence of San Onofre, typically at distance of greater than 5 miles away. The sampl e results from these stations are considered representative of background levels with no potenti a l for contribution from releases and sources at SONGS. The control stations also serve as indicators of rad i oactive sources other than SONGS , such as nuclear medicine applications. The se c ond type, representing indicator stations , is used to measure any radiation contributed to the e nv i ronment caused by San Onofre. Indicator stations are located close to San Onofre (within 5 miles), reflecting the nearby areas to prov i de environmental measurements for releas e s from the plant. Ind i cator stations can be located either onsite or offs i te. As des c ribed in Section 4 , below, the SONGS REMP is conducted in accordance with a Quality Assura n ce Program , meeting the requirements of NRC Regulatory Guide 4.15 , Rev. 1. Sampl e s are collected using approved methods; radiochemical analyses of these samples are performed using standardized analytical methods. The Contracted Environmental Analysis Labora t ory (CEAL) participates in an i nter-laboratory comparison program in partial fulfillment of the qu a lity assurance requirements for environmental monitoring. The CEAL participated i n cross check programs which meet the intent of Reg. Guide 4.15. See Appendix C for additional details. Page 16 2017 AREOR 2.3.1 Detection Limit Terminology The United States Nuclear Regulatory Commission (NRC) requires that equipment and analytical methods used for radiological monitoring must be able to detect specified min i mum limits for the type sample and the radionuclide of the analysis. The a priori detection capability for the analytical system used for the measurement is referred to as the Lower Limit of Detect i on (LLD). This LLD ensures that radiation measurements are sufficien t ly sensitive to detect any levels of concern and small changes in the environment. Samples with no detectable radiation levels are typically referred to as less than the m i nimum detectable concentration (MDC). The MDC is evaluated for each sample and is used to ensure that the specifi c analysis has sufficient sensitivity to detect levels consistent w i th the requirements for analys i s by the system LLD. For a more thorough discussion , refer to NUREG/CR-4007.

• Lower Limit of Detection (LLD) -The LLD is the a priori (before the fact) lower limit of detection for the method used for the analysis.

It is a measure of the detection capability for the analytical method and not for any s i ngle sample analysis. This value is calculated for each isotope and every ma t rix based on typical or expected values of decay time , sample size , counter efficiency , etc. The LLD values are listed in the ODCM and represent the detection capability that the analytical methods must meet for the specified sample med i a.

• Minimum Detectable Concentration (MDC) -The MDC is the a posteriori (after the fact) lower limit of detect i on based on actual decay time , measured sample size , and counting efficiency for an individual sample analysis.

The MDC is compared to the LLD to verify that the measurement met the ODCM requirements for the maximum value of the LLD for the listed analytes. Values above the MDC are presumed to represent " detected" levels of radioactivity.

• No Detectable (ND) -" No Detectable" is used for d i rect radiat i on dosimeters , such as TLDs and OSLs data , to designate when t he exposure measured is below the expected background exposure , plus a calculated uncertainty. The TLD will have measured radiation exposure, but the magnitude of the exposure is within the expected range , accounting for natural background and seasonal fluctuations. ND indicates that there was no exposure above the background variation that is attributable to SONGS. The sampling and analyses for the REMP are conducted in a manner to ensure the detection capabi li ties meet the specified requirements. Page 17 2017 AREOR 2.4 Regulations and Guidance
• 10 CFR 50, Appendix I 10 CFR 50 , Appendix I establishes limits on releases of radioactivity to the env i ronment and the resu l ting dose to the public. The limits are: Source NRC Limits for SONGS Liquid Effluent Less than or equal to 3 mrem/yr to whole body from all pathways of exposure Less than or equal to 10 mrem/yr to any organ from all pathways of exposure Gaseous Effluents

-Noble Less than or equal to 10 mrad/yr gamma air dose Gases Less than 20 mrad/yr , beta air dose Less than 5 mrem/yr , total body dose to an o ff s i te exposed i ndividual of the public lodine-131, tritium and Less than or equal to 15 mrem to any organ for an offsite particulates with half-life individual from all pathways of exposure greater than 8 days

• 40 CFR 190 The Environmental Protection Agency (EPA) has established environmental radiation protection standards in 40 CFR 190 for the uranium fuel cycle that includes nuclear power plants. These l i mits are applicable to the sum of liquid effluent , gaseous effluents and direct radiation.

The dose li mits from all applicable pathways to any offsite individual are o 25 mrem/year to the whole body o 75 mrem/year to the thyro i d o 25 mrem to any other organ As dis c ussed in the 2017 SONGS Annual Radioactive Effluent Release Report , the calculated dose to a member of the public as a result of SONGS is a small fract i on of the dose standard established by the EPA. This conclusion is supported by the results of the REMP , as reflected by the a bsence of measurable levels of radiation or radioactive materials in the offsite enviro n ment attributable to SONGS. Page 18 2017 AREOR The EPA established the following concentration limits for drinking water in 40 CFR 141: Source NRC Limits for SONGS Gross Alpha 15 pCi/L Gross Beta 50 pCi/L Ra-226 and Ra-228 5 pCi/L combined Sr-90 8 pCi/L Uranium 30 µG/L Tritium 30 , 000 pCi/L (limit for saltwater site; no downstream drink i ng water supplier) These limits were selected to ensure that no member of the publ i c receives more than 4 mrem total body or organ dose , based on 2 liters per day drinking water intake. The sampling of ocean water and groundwater in and around the plant confirms that SONGS has no impact on public water supplies for the surround i ng communities. The following regulatory and industry guidance has been identified as applicable to the SONGS REMP with application as may be required.

• US NRC Regulatory Guide 4.1 , Programs for Monitoring Radioactivity in the Environs of Nuclear Power Plants , 1975
• US NRC Regulatory Gu i de 4.2 , Preparatio n of Environmental Reports for Nuclea r Power Stations, 1976
• NUREG-0133 , Preparation of Radiological Effluent Technical Specificat i ons for Nuclear Power Plants
• US NRC Regulatory Guide 1.109 , Calculation of Annual Doses to Man from Releases of Reactor Effluents for the Purpose of Evaluating Compliance with 1 OCFR Part 50 , Appendix I , 1977
• NUREG-1301 , Offsite Dose Calculations Manual Guidance:

Standard Radiological Effluent Controls for Pressurized Water Reactors , Generic Letter 89-01 , Supplement No. 1 , 1991

• ANSI N545, American National Standard Institute, " American National Standard Performance , Testing , And Procedural Specifications for Thermoluminescence Dosimetry (Environmental Application), 1975
• ANSI/HPS N13.37 , " Environmental Dosimetry

-Criteria for System Des i gn and Implementation ", 2014

• US NRC Regulatory Guide 4.15 , Rev. 1, Quality Assurance for Radiological Monitoring Programs (Normal Operations)

-Effluent Streams and the Environment , 1979

• NUREG-1576 , Multi-agency Radiological Laboratory Analytical Protocols
• NUREG/CR-4007 , Lower Limit of Detection: Defin i tion and Elaboration of a Proposed Position for Radiological Effluent and Environmental Measurements , 1984 Page 19 2017 AREOR 2.5 NRC Reporting Levels The NRC has established required reporting levels that represent thresholds above which an investigation is needed to evaluate and ensure compliance with radiation safety standards for the public. Licensed nuclear facilities must prepare a special report and increase their sampling if any measured level of radiation or radioactive material in an environmental sample is equal to or greater than the corresponding reporting level. 2.6 Summary of Analysis of Results and Trends The 2017 SONGS REMP was conducted in accordance with 10 CFR 50, Appendix I, 10 CFR §50.36a, and Section 5.0 of the SONGS Offsite Dose Calculation Manual (ODCM). The REMP sample data have been summarized in the format specified in NUREG-1301. Data have been evaluated to identify the levels of any plant-related environmental radioactivity above background levels (i.e., plant-related contributions that are distinguishable from background). For data distinguishable from background , a comparison has been made between current environmental monitoring results and preoperational or previous operational data as appropriate , for trending environmental radioactivity resulting from plant operation. To conform with 10 CFR Part 50, Appendix I, Section IV B.2 , data on measurable levels of radiation and radioactive materials in the environment are provided to allow for a comparison to the predicted (calculated) values in the environment from radioactive material released in effluents.

The tabulated means, ranges , and standard deviations are presented in Appendix B. Compa r isons with background and pre-operational baseline data are presented in Appendix D. Page I 10 2017 AREOR The REMP data are reviewed for accuracy, compared against NRC reporting levels , and entered into the REMP database. Measurements exceeding the administrative levels (10% of the NRC reporting levels) are flagged. Analyses are performed using i nstrumentation and methods that provide analytical results with a level of detection as required by the ODCM. The a posteriori Minimum Detectable Concentration (MDC) is compared to the maximum value for the a priori Lower Limit of Detection (LLD) specified in the ODCM. This ensures that regulatory limits for the maximum LLD are met. Table 1 -Ma xi mum LLDs a s Specified in SONGS ODCM Airborne Particulate Water or Gases Analysis (pCi/L) 3 (pCi/m ') I Gross beta 4 I 1E-02 H-3 2000 I Mn-54 15 Fe-59 30 I Co-58 , 60 15 Z n-65 30 I Zr-95 , Nb-95 15 1-131 1 7E-02 I Cs-134 15 5E-02 Cs-137 18 6E-02 I Ba-140 , La-140 15 Marine Animals (pCi/kg, wet) 130 260 130 260 130 150 Local Crops (pCi/kg, wet) 60 60 80 Sediment (pCi/kg, drv) 150 180 j l ] J ] The impact of SONGS on the surrounding environment is assessed through a series of analyses. These analyses include: data reduction , comparisons of indicator to control locations (Appendix B); comparison of operational to preoperational environmental data (Appendix D); summary of deviations from sampling requirements and corrective actions taken (Appendix E); and the results of the 2017 Land Use Census (Appendix F). The results of the 2017 monitoring program show no levels of direct rad i ation or radioactive materials from SONGS distinguishable from background in the offsite environment. Environmental samples from areas surrounding SONGS continue to indicate no radiological impacts from the plant. A detailed discussion of the 2017 analytical results is presented in Appendix B to Part II of this report. Analytical values from offsite indicator sample stations continue to trend with the control stations. With the exception of measured medical radioisotope iodine-131 in kelp , unrelated to SONGS , no measurements were distinguishable from background levels. The data indicate that SONGS continues to have no measurable radiological impact on the environment or any member of the public during 2017. In addition, dose to members of the public attributable to SONGS related radiological activities remain well below regulatory limit of 100 mrem per year, as specified in 10 CFR 20 , § 20.1301 and in keeping with the philosophy of " as low as is reasonably achievable" (ALARA), as specified in 10 CFR 20.1101 (b ). The REMP data collected during 2017 , as in previous years , continues to be in line with background levels. The data are summarized in the Statistical Summary of REMP Data found in Appendix B. Cesium-137 (Cs-137) is routinely i dentified in some soil samples and lodine-131 (1-131) i s found in some kelp samples. Cs-137 and 1-131 are radionuclides that could be associated with releases from nuclear power plants , including SONGS. However, the level of Cs-137 found in soil is consistent with historical and expected Cs-137 concentrations from Page I 11 2017 AREOR nuclear weapons testing. Since SONGS is no longer operating , there is not a realistic generation source for 1-131; therefore it is considered to be associated with use as medical administrations. It is no longer being generated as a fission product from the SONGS operation. And with its 8-day radioactive half-life, it is unrelated to any decommissioning activities at SONGS. Naturally occurring radionuclides , including beryllium-? (Be-7), potassium-40 (K-40), thorium-228 (Th-228) and thorium-230 (Th-230) were detected in both control and indicator locations at similar concentrations and are not related to the operation of SONGS. Refer to Appendix B for a more detailed discussion. 3 Land Use Census In accordance with 1 OCFR Part 50, Appendix I , Section IV.B.3, each year a Land Use Census is performed to identify any changes in the use of areas at and beyond the site boundary. Modifications to the monitoring program are made if required by the results of this census to reflect new or changes in locations for pathways of exposure around the plant. Appendix F of the report identifies changes to the census in 2017; no changes in the sampling media or sample locations were required. However , the SONGS indicator garden was relocated to a location near Air Sampler #11. 4 Quality Assurance To assure quality of sample analyses , a portion of REMP i s devoted to quality assurance. All REMP activities , including support contractors , are assessed as defined in Regulatory Guide 4.15 , Rev. 1. The quality assurance program's main aspects include process quality control, instrument quality control , comprehensive data reviews , cross-check analyses , and audits. Routine REMP assessments ensure that the program , procedures and personnel are performing satisfactorily. Samples are collected using approved methods; radiochemical analyses of these samples are performed using standardized analytical methods. Quality audits and independent technical reviews help determine areas that need attention. Thes~ areas are addressed in accordance with the station's Corrective Action Program. Duplicate sampling of the environment is performed by SONGS to demonstrate repeatability of the sample collection , preparation , and analysis process. Split sample analysis is performed for the evaluation of the precision and bias trends of the method of analysis without the added variables introduced by sampling. SONGS participates in a sample splitting program with the California Department of Public Health Radiological Health Branch (CDPH-RHB) in accordance w i th the site's REMP procedures. GEL Laboratories , LLC (GEL) performs the radiochemistry analysis of samples noted within this report. GEL performs the requested analysis under its Quality Assurance Program , which meets the requirements of Title 10 Code of Federal Regulations Appendix B Part 50 , ASME NQA-1 and Regulatory Guide 4.15 Revision 1. The measurement capabilities of the radiological laboratory are demonstrated by participating in an inter-laboratory measurement assurance program and performing duplicate and split sample analyses. Approximately 10% of the analyses performed are quality control samples , consisting of inter-laboratory measurement assurance program samples , duplicate samples, and split samples. The inter-laboratory measurement assurance program provides samples that are similar in matrix and size to those sampled and measured by the REMP. This program assures that equipment calibrations and sample preparation methods accurately measure radioactive material i n samples. See Appendix C for detailed QA measurement data. Page 112 2017 AREOR Stanford Dosimetry performs the environmental TLD analyses noted i n this report. Stanford Dosimetry performs the requested analyses under its quality assurance program which meets the requirement of Title 10 Code of Federal Regulations Part 50 , Appendix B , ASME NQA-1 and Regulatory Guide 4.15 Revis i on 1. 5 Program Deviations Any deviation in the conduct of the program as required, either in terms of sample collection or analysis , requires an investigation as to the cause and identification of measures to prevent recurrence. Deviations from the sampling program or sensitivity requirements are acknowledged and explained in Appendix E to this report. 6 Conclusion Radiological environmental data collected throughout 2017 have been evaluated to determine any impact that San Onofre operations has on the surrounding environment. To accomplish this, several methods of evaluation were employed , namely: 1. Compilation and verification of all data, as well as a determination of those data considered to be significantly greater than background levels. 2. Correlation of effluent concentrations to concentrat i ons in the environment. Refer to Appendix B. 3. Examination of time dependent variations of pertinent radioisotopes in selected environmental media throughout the year at both ind i cator and control locations. 4. Comparison of radioactivity in various media in 2017 against the levels observed in p reoperational years. 5. Historical trending of radionuclides in various media during operational years. This evaluation did not identify any radionuclides attributable to the operation of SONGS above background in any sample measurement or med i a. It is concluded that the operation of SONGS throug h 2017 had no observable radiological environmental impact. 7 References

1. SONGS Offsite Dose Calculation Manual (ODCM) Revision 11 , Section 5.0 , 2017. 2. SONGS Radiological Monitoring (RM) Procedures

a. SDS-CH2-PGM

-1006 , Radiological Environmental Monitor i ng Program b. SDS-CH2-PCD-1023 , Review , Analysis and Reporting of Radiological Environmental Monitoring Program (REMP) Data 3. N UREG/CR-4007 , " Lower Limit of Detection: Definition and Elaboration of a Proposed P osition for Radiological Effluent and Environmental Measurements ", August 1984. Page 113 2017 AREOR APPENDIX A. SAMPLE TYPE AND SAMPLING LOCATIONS Page 114 APPENDIX A 2017 AREOR Table 2 -Direct Radiation Measuring Locations 1 City of San Clemente (Former SDG&E Offices) (Control) 5.7 NW 2 Camp San Mateo -(MCB, Camp Pendleton) 3.6 N 3 Camp San Onofre -(MCB , Camp Pendleton) 2.8 NE 4 Camp Homo -(MCB , Camp Pendleton) 4.4 E 6 Old El Camino Real (AKA Old Highway 101) 3.0 ESE 8 Noncommissioned Officers' Beach Club 1.4 NW 10 Bluff 0.7 WNW 11 Former Visitors' Center 0.4 b NW 12 South Edge of Switchyard 0.2 b E 13 Southeast Site Boundary (Bluff) 0.4 b ESE 15 Southwest Site Boundary (Office Building) 0.1 b SSE 16 East Southeast Site Boundary 0.4 b ESE 19 San Clemente Highlands 4.9 NNW 22 Former US Coast Guard Station -San Mateo Point 2.7 WNW 23 SDG&E Service Center Yard (Control) 8.1 NW 31 Aurora Park -Mission Viejo (Control) 18.6 NNW 33 Camp Talega -(MCB , Camp Pendleton) (Contro l) 5.9 N 34 San Onofre School -(MCB , Camp Pendleton) 1.9 NW 35 Range 312 -(MCB , Camp Pendleton) 4.8 NNE 36 Range 208C -(MCB , Camp Pendleton) 4.1 NE 38 San Onofre State Beach Park 3.4 SE 40 SCE Training Center -Mesa 0.7 NNW 41 Old Route 101 -East 0.3 b E 44 Fallbrook Fire Station (Control) 17.7 E 46 San Onofre State Beach Park 1.0 SE 47 Camp Las Flores -(MCB, Camp Pendleton) (Control) 8.6 SE 49 Camp Chappo -MCB (Control) 12.9 ESE 50 Oceanside Fire Station (Control) 15.6 SE 53 San Diego County Operations Center (Control) 44.2 SE 54 Escondido Fire Station (Control) 31.8 ESE 55 San Onofre State Beach (U1 West) 0.2 b WNW Page I 15 APPENDIX A 2017 AREOR lt%j':l'X~t", *~rz,, * '.f1:"b "'"'~ff;111WC~i'1~~~\~~iiiffl'.l'-~~;,tl,'<0?~?'[j~t~¥£':,Yl'U!~ .> ... ' l ' '. ,;' ,.*. ' ~* ' \, :',," :';, ~~.'.'. ... ~:. ;: \;;~ Jl;:*:,),,,Jifi~:,'.,,"*'-ft'ii,1/,;;:;,*i; ",.~ '.,i/,0:;/::;,l'.f,f .,,~<;;1 11 i~ii:~ , / 1, 1~t\l~,~1J~,~~;~~~it~lti~Lffl;!~<<1rJB-~!iilm~~}~~l~~1r:~~,,~~IJQi 56 San Onofre State Beach (U1 West) 0.2 b w 57 San Onofre State Beach (Unit 2) 0. 1 b SW 58 San Onofre State Beach (Unit 3) 0.1 b s 59 SONGS Meteorological Tower 0.3 b WNW 61 Mesa -East Boundary 0.7 N 62 MCB -Camp Pendleton 0.7 NNE 63 MCB -Camp Pendleton 0.6 NE 64 MCB -Camp Pend l eton 0.6 ENE 65 MCB -Camp Pendleton 0.7 E 66 San Onofre State Beach 0.6 ESE 67 Former SONGS Evaporation Pond 0.6 NW 68 Range 21 OC -(MCB , Camp Pendleton) 4.4 ENE 73 South Yard Fac ili ty 0.4 b ESE 74 Oceanside City Hall (Backup Control) 15.6 SE 75 Gate 25 MCB 4.6 SE 76 El Camino Real Mobil Station 4.6 NW 77 Area 62 Heavy Lift Pad 4.2 N 78 Homo Canyon (AKA Sheep Valley) 4.4 ESE Table 3 -A ir borne Radioactivity Sampling Locations 1 C i ty of San Clemente (City Hall) 5.1 NW 7 AWS Roof 0.18 b NW 9 S t ate Beach Park 0.6 ESE 10 B l uff 0.7 WNW 11 Mesa EOF 0.7 NNW 12 Former SONGS Evaporation Pond 0.6 NW 13 Marine Corp Base (Camp Pendleton East) 0.7 E 16 San Luis Rey Substation (Control) 16.7 SE Page I 16 APPENDIX A 2017 AREOR Table 4 -Soil Sampling Locations 1~**, *~ : . f; .17,~ Fl<"~.<<~"~"'"'!"":"}' ',,,...~,7'*,:,,~,rnit;Jf\~ffi'.*:!""t,*?if;!IU'P:r,~~~::"B"'*"' '"-;;*~~l'~~ffft'ff>177s"f;'l>~

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' 'ZIJ 11'\,/:;;J-J:4.'i ~.;tJ,;1';;,;~), 1$'.t~t,i<U~-t~~;t,! *""" A San Onofre Kelp Bed 1.5 s B San Mateo Kelp Bed 3.8 WNW C Barn Kelp Bed 6.3 SSE E Salt Creek (Control) 11 to 13 WNW to NW Table 11 -Backup Kelp Sampling Locations G Capistrano Beach Reef (not listed in the ODCM) 8.9 to 9.1 NW H San Clemente Pier (not listed in the ODCM) 5.7 to 5.8 NW Wheeler North Artificial Reef (not listed in the ODCM) 5.3 WNW Page I 18 APPENDIX A 2017 AREOR Table 12 -Ocean Bottom Sediment Sampling Locations ,J*;' I *~ '~1'?~,{>.,t<~~\-_fc" ' . .. r "" .. ,~~'ff', 1~=1!;"'"'Jrf;t"j~7}1T"i1:;-'5.~~~-,;i .~f1'-''-. '"'" '""', *:~*.pi:f;~~~*&,y:_,,,*~~,1' j;A ,; ,* , ,'. ,,, ' , ,,;',,,': ,' . ;;, . * .. :~ '": ,~' .< . ' '.' . , :;:,:'J*!:,;:,:t;~~ . . , I i-:.J" ,.,~~~ .. ~" ::.." ,;'};J;L,t.~J.:..:::~,i: .. -.* s;'..:C: ,; .,.~J .:.,.:'~JLJ~.:t,",;£~~\i1.t:1!{ifilhl~J:i_4jl~£,:~~1.i~f~}*l. t.:O *J,.,.1-,/i"L~L..:',#i~*J. 1~, hl:1fl.w;;){U,~~1l~£t:.::, B C D E F 51 52 Un i t 1 Outfall 0.8 SSW Unit 2 Outfall 1.6 SW Unit 3 Outfall 1.2 SSW Laguna Beach (Control) 20-25 NW SONGS Up-coast 0.9 WSW Unit 2 Conduit (not listed in the ODCM) 0.1 SW Unit 3 Conduit (not listed in the ODCM) 0.1 SSW N OTES a Distan ce (miles) and Direction (sec tor) are measured relative to Units 2/3 midpoint as described in the ODCM Rev. 8. Direction determined from degrees true north. b Distances are within the Un its 2/3 SAB/EAB (Site Area Boundary/Exclusion Area Boundary) c Soil samples are not required by Technical Specifications. d Kelp samples are not required by Technical Specifications. e Backup kelp sampling locations are only used if needed, In 2017 , no samples were obtained from backup kelp sampling locations. MCB Marine Corps Base (Camp Pendleton) Page I 19 APPENDIX A 2017 AREOR Tab l e 1 3 -Sector and D i rection Designations Sector Center Sector 22.5° Direction Limit Line Limit Sector 348.75 0 & 360 11.25 A N 11.25 22.5 33.75 B NNE 33.75 45.0 56.25 C NE 56.25 67.5 78.75 D ENE 78.75 90.0 101.25 E E 101.25 112.0 123.75 F ESE 123.75 135.0 146.25 G SE 146.25 157.0 168.75 H SSE 168.75 180.0 191.25 J s 191.25 202.5 213.75 K SSW 213.75 225.0 236.25 L SW 236.25 247.5 258.75 M WSW 258.75 270.0 281.25 N w 281.25 292.5 303.75 p WNW 303.75 315.0 326.25 Q NW 326.25 337.5 348.75 R NNW Page I 20 APPENDIX A

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.,. '"'* o,a ,_, .. .,'=!,"::~:ft..:::a.daf\ Figure 7 -SONGS REMP 30-mile Radius North SectorP WNW Sector N w 2017 AREOR Page 124 APPENDIX A San 1 Onofre RE P 45-Mlle South ') Ocean oc.e,,.....,., + 'aMt""'-a....,..,,. -n.o --fr--, -* Figure 8 -SONGS REMP 45-mile Radius South 2017 AREOR Page 125 APPENDIX B. RESULTS AND DISCUSSIONS OF 2017 ENVIRONMENTAL DATA 2017 AREOR Page I 26 APPENDIX B 2017 AREOR To ass e ss the changes or trends in the radioactivity level in the environment over the past year, the data from January 1, 2017 through December 31, 2017 were evaluated. A summary of the type a n d number of REMP samples obtained in 2017 appears in Table 14. The analysis results , as presented below , support the conclusion that all measured levels of radioactivity are attributable to sources external to SONGS (fallout from the nuclear accident at the Fukus hi ma Daiichi Nuclear Power Station, or Chernobyl, residual fallout from legacy atmospheric nuclear weapons testing, and discharge of medically administered 1-131 from the San Juan Sewage Plant outfall). Cs-137 has been intermittently detected in the indicator and in the control soil samples in past years and no correlation between Cs-137 level in soil and proximity to the plant h a s been observed. Cs-137 levels in marine animal flesh found in indicator samples closely mirror those found in control samples. We conclude that SONGS had no statistically significant radiological environmental impact during 2017. Table 14 -REMP Sample Analysis Summary for 2017 Direct Radiation Air b orne Particulates Ocean Water Drinki ng Water , Unfiltered Sh o rel ine Sediment Ocea n Bottom Sed imen t Mari n e Species, Flesh Local Crops Kelp Soil NOTES Dos imetry Gross Beta 1-131 Gamma Gamma H-3 H-3 Gamma , H-3 Gross Beta Gamma Gamma Gamma Gamma Gamma Gamma Quarterly 49 195 c Weekly 8 415 8 415 Quarterly 8 32 Monthly 4 48 4 48 Quarterly 4 16 2 24 Monthly 2 24 2 24 Semi-Ann ually 4 8 Semi-Annually 7 14 Semi-Annually 3 24 Semi-Annually 2 1 ob Semi-Annually 4 8 Annually 5 5 a. The total number of analyses includes environmental samples not required by the ODCM , such as ocean water and ocean bottom samples from locations not listed in the ODCM. b. An extra sample of yellow squash was taken in the fall of 2017 at each location. c. Environmental dosimeters used for ISFSI monitoring not included in this total. Page 127 APPENDIX B 2017 AREOR A. Results and Discussions of 2017 Environmental Data 1. Direct Radiation Direct gamma radiation is monitored in the environment by calcium sulfate (CaS0 4) Thermoluminescent Dosimeters (TLDs) placed at 49 locations and analyzed quarterly per ANSI/HPS N13.37-2014 standards. The natural direct gamma radiation varies according to location because of differences in the natural radioactive materials in the soil, soil moisture conten t , and other factors. Figure 9 compares the direct gamma radiation measurements for indicator and control locations with those from the site EAB. The values plotted are the averages for all of the stations according to type. The trends of Figure 9 clearly show that any contribution from SONGS to the off-site environment direct dose component is negligible, being indistinguishable from the background variation. Beginning in October 2016, SONGS implemented new ANSI/HPS N13-37-2014 for environmental dosimetry system design and implementation. In accordance with this standard , the raw TLD resu lts are adjusted by the exposure to air kerma (8. 76 mGy/R) and air kerma to ambient dose (1.2 rem/Gy) conversion factors described in ANSI/HPS N13.37-2014, Section 3.2.1. This change results in a slight increase in the value of the dose , by a factor of 1.05 mrem/mR. Previous results in the AREOR were expressed in mR, but in keeping with ANSI N13.37 , 2017 results are expressed in mrem. TLDs located greater than five miles from SONGS are generally considered control TLDs. The ind icator locations are selected as inner and outer rings as required by the ODCM. Additional TLDs are placed at locations of interest such as schools and hospitals. All 2017 control location TLD re a dings were below the minimum detectable dose and all 2017 indicator location readings outside the Exclusion Area Boundary (EAB) were below the minimum detectable dose. The Annual Public Dose, as referenced in Table 15, is based on the potential member of the public exposure at the listed location. For offsite locations , the occupancy factor is 1 , for potential time occupancy. For onsite locations, at or near the EAB/CAB, the occupancy factor is determined per SDS-RP1-PCD-1007, Direct Radiation Exposure Controls and Monitoring. The da t a indicate detectable direct radiation measurements only in the immediate vicinity of SONGS, via those dosimeters placed either within or immediately adjacent to the EAB. The hypothetical maximum associated exposure to a member of the general public , adjusted for occupancy per SDS-RP1-PCD-1007, is less than 1 mrem per year as measured by this sample media. Refer to Table 15 for a summary of all 2017 SONGS REMP TLD data. Page I 28 APPENDIX B 25 20 ._ 15 ., t:: .. :, tT -ci t; E 10 5 0 l'\A .,. ' J \1 ' ... k A. J " v v 2017 AREOR Av e r a g e Qu a rt e rl y T L D E xp os ur e (m re m/s td. qtr) /1. i\ r I\ A A I I\ U' , v v \I I r\ ,, v, \. \ \ r ""' ' l \ , .-, ~I 'A A ,./ 1(A {\_ p -...::: ,.,,... ' r ' ' r . l'V 'f -.. con rol -In [:licat< 1r --EAE! 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2 0 18 F i gure 9 -SONGS REMP TLD data through 2017 Figure 9 compares environmental radiation levels of indicator and control locations for 2017 and previous years. These figures show the close correlation between the control and indicator locatio n TLD exposure data. Beginning in 2016 , the results have been increased by the conver s ion factors as described above. This increase , of roughly 1 mrem/quarter , can be seen in Figure 9 above. Ten laboratory control TLDs were analyzed quarterly. TLD numbers 1 , 23, 31 , 33 , 44 , 47 , 49, 50 , 53 , 54 and 7 4 are control TLDs. Separate TLDs are used to compensate for transit dose and a fade TLD is used to evaluate for the time and temperature dependent "fade" that may affect dosim e ter data. After the samples were analyzed , the measured doses were corrected for pre and post fi e ld exposure times. Neutron dosimeters were placed at REMP TLD station 55 and at selected locations around the Independent Spent Fuel Storage Installation (ISFSI). In 2017 no neutron radiation was detected at station 55. Some neutron radiation (up to 2.4 mrem/quarter) was detected at some of the ISFSI locations. a. Direct Radiation baseline evaluation and estimation of natural background An in-depth analysis of the environmental radiation results for the per i od of 2001 through 2010 was completed for all the monitoring locations. It can be inferred that if the standard deviation was low and no additional exposure above background was identified at a particular station , the average of that st a tion's radiation exposure results should be equal to natural background (baseline) at that location. The baseline results for REMP TLDs have been summarized with the annual and quarterly values in the 2017 TLD Data Table. Natural background radiation is variable and a minor shift in location can yield a measurable change in background radiation. Therefore if a TLD is moved the baseline (background) for that location may be affected. Page 129 APPENDIX B 20 1 7 AREOR The baseline environmental exposure analysis of 2001 through 2010 environmental TLD results i ncluded an assessment of the standard deviation of the quarterly results and annual totals at each control location. Th i s is an appropriate methodology to determine the ability to detect radiation exposure above background , described i n ANSI/HPS N13.37-2014 , " Environmental Dos i metryCriteria for System Des i gn and Implementation ." The quarterly and annual results expressed in Table 15 are positive exposure if they exceed either 5 mrem quarterly or 10 mrem annua ll y. If no t, the measurement i s noted as " ND" for " Not Detectable. An empir i cal determ i nation of the background baseline for stations w i th i n the Exclusion Area Boundary (EAB) is not possible due to the known plant related radiolog i cal activities (e.g., storage and transport of radioactive materials) that occurred during the baseline calculation study period. The average of the non-EAB stations close to the beach was approximately 15.8 mrem per quarter. A value of 15.8 mrem per quarter was conservatively selected as the baseline for the REMP stations located within the EAB. In 1980 the Department of Energy (DOE) conduc t ed an Ae ri al Radiological Survey of SONGS and the sur r ounding area. The baseline/background value of 15.8 mrem per standard quarter within the SONGS EAB is consistent w i th the 1980 gamma exposure rates reported by the DOE for the areas immediately north and south of SONGS , tak i ng into account the reduction in environmental radioactivity and background dose rates caused by the decay of atmospheric nuclear weapons testing fallout since 1980. Page I 30 APPENDIX B 2017 AREOR Table 15 -SONGS REMP TLD Data City of San Clemente 5.7 18.4 17.9 18.1 17.3 18.6 ND ND ND ND 73.5 71.8 ND ND 2 Camp San Mateo -MCB 3.6 19.6 18.8 18.9 18.3 19.6 ND ND ND ND 78.2 75.7 ND ND 3 Camp San Onofre -MCB 2.8 17.2 16.9 17.7 16.7 18.3 ND ND ND ND 68.9 69.6 ND ND 4 Camp Homo -MCB 4.4 19.0 17.9 19.1 18.7 18.4 ND ND ND ND 76.0 74.0 ND ND 6 Old Route 101 (ESE) 3 12.0 9.7 12.8 10.8 12.1 ND ND ND ND 47.9 45.3 ND ND 8 Noncomm issioned Officers' 1.4 16.2 16.3 16.5 16.7 16.5 ND ND ND ND 65.0 66.0 ND ND Beach Club 10 Bluff 0.7 17.2 16.0 17.0 15.8 17.7 ND ND ND ND 69.1 66.6 ND ND 19 San Clemente Highlands 4.9 18.7 18.3 19.7 18.7 19.3 ND ND ND ND 75.0 76.0 ND ND 22 Former US Coast Gua rd 2.7 18.8 17.9 19.2 17.8 19.4 ND ND ND ND 75.4 74.3 ND ND Station 23 I SDG&E Service Center Yard (Control) I 8.1 I 16.6 I 15.5 I 15.9 I 15.3 I 17.0 I ND I ND I ND I ND I 66.3 I 63.7 I ND I ND 31 I Aurora Park -Mission Viejo (Control) I 18.6 I 19.4 I 19.3 I 19.6 I 19.4 I 19.6 I ND I ND I ND I ND I 77.9 I 77.9 I ND I ND 33 Camp Talega -MCB 5.9 19.9 18.3 18.7 19.4 20.7 ND ND ND ND 79.3 77.1 ND ND (Contro l) 34 San Onofre School -MCB 1.9 17.0 16.3 17.3 16.0 16.7 ND ND ND ND 68.0 66.2 ND ND 35 Range 312 -MCB 4.8 17.8 16.1 15.5 15.5 16.4 ND ND ND ND 71.0 63.5 ND ND 36 Range 208C -MCB 4.1 20.5 19.4 21.1 19.2 20.8 ND ND ND ND 81.8 80.5 ND ND 38 San Ono fre State Beach Park 3.4 15.0 13.4 15.3 13.7 14.1 ND ND ND ND 60.1 56.5 ND ND 40 SCE Training Center -Mesa 0.7 18.0 17.4 17.8 17.0 18.5 ND ND ND ND 71.9 70.7 ND ND 44 Fallbrook F ire Station 17.7 14.7 15.9 15.0 14.5 15.6 ND ND ND ND 58.9 61.0 ND ND (Control) 46 San Onofre State Beach Park 1 12.8 11.8° 12.4 12.7 13.5 ND ND ND ND 51.2 50.4 ND ND 47 Camp Las Flores -MCB 8.6 14.0 16.2 15.8 15.4 16.2 ND ND ND ND 55.8 63.5 ND ND (Control) 49 I Camp Chappo -MCB (Control) I 12.9 I 14.9 I 15.8 I 15.6 I 15.3 I 16.3 I ND I ND I ND I ND I 59.8 I 63.0 I ND I ND 50 I Oceanside F ire Stat ion (Control) I 15.6 I 17.4 I 18.2 I 17.7 I 16.6 I 17.6 I ND I ND I ND I ND I 69.7 I 70.0 I ND I ND 53 San Diego County 1 Oeerations Center (Control' I 44.2 I 19.1 I 20.0 I 19.4 I 18.7 I 20.1 I ND I ND I ND I ND I 76.6 I 78.2 I ND I ND 54 Escondido Fire Station 31.8 16.9 18.6 17.8 16.9 18.0 ND ND ND ND 67.7 71.4 ND ND (Control) 61 Mesa -East Boundary 0.7 16.2 15.1 15.6 15.1 16.7 ND ND ND ND 64.9 62.5 ND ND 62 Camp Pendleton 0.7 13.9 12.6 12.8 12.6 14.2 ND ND ND ND 53.0 52.2 ND ND 63 Camp Pendleton 0.6 14.6 14.1 14.7 13.8 14.8 ND ND ND ND 58.3 57.5 ND ND 64 Camp Pendleton 0.6 15.8 14.7 15.7 13.9 16.2 ND ND ND ND 63.2 60.5 ND ND Page I 31 APPENDIX B 2017 AREOR 65 Camp Pendleton 0.7 14.1 13.3 13.7 13.0 14.3 ND ND ND ND 56.6 54.3 ND ND 66 San Ono fre St ate Beach 0.6 14.7 14.0 14.5 14.1 14.8 ND ND ND ND 58.4 57.4 ND ND 67 Former SONGS Evaporation 0.6 17.8 17.1 17.9 16.9 18.3 ND ND ND ND 71.2 70.2 ND ND Pond 68 Range 210C -MCB 4.4 15.8 16.4 16.6 15.6 18.1 ND ND ND ND 63.3 66.7 ND ND 74 Oceanside City Hall (Backup 15.6 14.0 14.3 13.7 13.1 13.7 ND ND ND ND 56.1 54.8 ND ND Control 75 Gate 25 MCB 4.6 16.7 15.5 16.3 15.9 16.7 ND ND ND ND 66.9 64.4 ND ND 76 El Camino Real Mob il Stat i on 4.6 18.2 18.4 18.9 18.2 18.8 ND ND ND ND 73.0 74.3 ND ND 77 Area 62 Heavy Lift Pad 4.2 20.2 18.5 20.9 19.3 20.5 ND ND ND ND 80.8 79.2 ND ND 78 Horno Canyon 4.4 11.7 11.6 13.7 11.4 11.8 ND ND ND ND 46.9 48.5 ND ND 11 Former Visitors' Center* 0.4 15.8 16.1 16.1 16.4 15.7 ND ND ND ND 63.1 64.3 ND ND 12 South Edge of Switchyard

• 0.2 15.8 17.0 16.9 17.0 16.7 ND ND ND ND 63.1 67.7 ND ND 13 Southeast Site Boundary 0.4 15.8 20.3 20.8 18.7 20.2 ND 5.1 ND ND 63.1 80.1 17.0 0.0 Bluff)* 15 Southeast Site Boundary 0.1 15.8 20.3 21.5 19.9 21.5 ND 5.8 ND 5.8 63.1 83.3 20.3 0.7 Office Bid a 16 East Southeast S it e 0.4 15.8 17.5 16.7 15.6 17.3 ND ND ND ND 63.1 67.0 ND ND Bounda a 41 Old Route 101 -East* 0.3 15.8 15.7 15.8 15.4 16.3 ND ND ND ND 63.1 63.0 ND ND 55 San Onofre State Beach (U1 West a.d 0.2 15.8 18.6 18.3 18.3 18.6 ND ND ND ND 63.1 73.8 10.7 0.4 56 San Onofre State Beach (U1 0.2 15.8 15.4 17.6 15.1 17.2 ND ND ND ND 63.1 65.3 ND ND West* 57 San Onofre State Beach (Unit 0.1 15.8 16.7 15.8 16.6 16.9 ND ND ND ND 63.1 66.0 ND ND 2 a 58 San Ono fre State Beach (Unit 0.1 15.8 17.6 17.7 17.2 17.1 ND ND ND ND 63.1 69.5 ND ND 3 a 59 SONGS Meteorolog i cal 0.3 15.8 19.9 19.6 19.3 20.6 ND ND ND ND 63.1 79.3 16.3 0.9 Tower* 73 South Yard Facility* 0.4 15.8 18.6 18.8 17.6 19.1 ND ND ND ND 63.1 74.0 11.0 0.6 NOTES: a. Station is within the Exclusion Area Boundary (EAB). The quarterly baseline has been estimated to be 15.0 mR within the EAB. b. ND indicates that the TLD did not measure exposure greater than 3cr 0 or 3cr A above the historical baseline , for that location.

See ANSI/HPS N13.37-2014 for information on the determination of 3cr 0 or 3cr A. C. Publ i c dose i s calculated based on an occupancy factor of 1 (f ull time exposure) for locations offsite. Public dose is calculated per SDS-RP1-PCD-1007 for locations in the EAB/CAB d. Station 55 includes neutron dose , estimated using a neutron signal (R n) conversion factor of 10.5*R n/rem (HPSTID 08-015) e. SCE-46 TLD lost in 01. Calculated value is based on ratio of SCE-46 to nearby location SCE-66 in 2016 04. f. 1.051 mrem/mR from ANSI N13.37-2014 , Section 3.2.1 Page 132 APPENDIX B 2017 AREOR b. Quality Control Duplicate Direct Radiation Samples Duplicate Quality Control (QC) TLD was installed adjacent to TLD #66. The duplicate TLDs agreed closely with the indicator TLDs, see Appendix C for results. These TLDs were not required by the ODCM and are not included in the Statistical Summary of REMP Data. c. ISFSI Direct Radiation Samples Independent Spent Fuel Storage Installation (ISFSI) TLDs were placed in the vicinity of the ISFSI. Data from these TLDs have not been included in the statistical summary of REMP data since these TLDs are not required by the ODCM. The ISFSI data are listed and discussed in Appendix I. 2. Airborne Particulate, Iodine, and Composite Isotopic Analyses Air particulate samples were collected on a weekly basis from seven indicator locations and from one control location. The samples were analyzed for gross beta activity, 1-131, and composited quarterly for gamma isotopic analysis. Sample locations were selected according to the req u irements of the ODCM. Gross beta analysis is a measure of total radioactivity of beta-emitting radionuclides in a sample. Beta radiation is emitted by many radionuclides, but beta decay gives a continuous energy spectrum rather than the discrete energy lines or peaks associated with gamma radiation. Gross beta measurements can only be used as an indicator of potentially elevated levels; i t does not identify specific radionuclides. Gross beta measurement data serves as a screening tool to determine if further analysis is required. All weekly gross beta activity analysis results were above the MDC. The concentration of ~ross beta activity in the samples collected from the indicator locations ranged from 0.009 pCi/m to 0.096 pCi/m 3 , averaging 0.025 pCi/m 3 of air. The concentrations of gross beta activity in the samples from the control location ranged from 0.008 to 0.091 pCi/m 3 , averaging 0.026 pCi/m 3 of air. There is seasonal variability to the gross beta results for air samplers, and the magnitude of the results in 2017 are not significantly different from what has been seen in previous years. Near the later portion of 2017 , there was a noticeable increase in the gross beta data for all locations , both control and indicators. This trend will be monitored in 2018, and the fact that the trend is evident in both control and indicator locations shows that this is not the result of releases of radioactive material from SONGS. Per the requirements of the ODCM, Section 5, Table 5-1 , an assessment was performed to determine whether the gross beta activity of the indicators exceeded 10 times the background ( control location #16). The results showed that indicator locations maximum gross beta activity in air in 2017 was 0.096 pCi/m 3 which is less than 10 times the average background measured at the control location (0.026 pCi/m3). No further action is required by the ODCM. Indicator samples analyzed for 1-131 were all identified below the MDC. No action was required by the ODCM. In summary, average quarterly air particulate sample beta activity from the indicator stations and control station have been compared historically through 2017. The average of the indicators trends closely with the offsite control values. The comparison illustrates that SONGS has not contributed to detectable levels of radioactive material in the environment around the plant. T here has been no detectable impact of the plant on air radioactivity. These stations are located near the site boundary downwind from the plant, based on the prevailing wind direction. The beta activity measured in the air particulate samples is from naturally occurring radioactive material. Gamma analyses are performed on quarterly composites of the air particulate sample s to determine if any activity is from SONGS. The gamma analyses have revealed no radioactivity from SONGS. Page I 33 APPENDIX B 2017 AREOR 3. Ocean Water Monthly ocean water samples were collected from three indicator locations near each station discharge and from the control location at Newport Beach. The samples were analyzed for naturally-occurring and SONGS-related gamma-emitting radionuclides, including tritium. Quarterly composite ocean water samples were analyzed for tritium according to ODCM requirements. Throughout 2017, only naturally occurring radionuclides were detected in the monthly gamma spectral analyses of ocean water. Monthly ocean water samples were also analyzed for tritium, consistent with the State of California Department of Public Health (DPH) split sample program. During 2017 all REMP ocean water sample results for tritium were below the count specific MDC. The da t a indicate that the operation of SONGS had no measurable impact on the environment as measured by ocean water. 4. Drinking Water In 2017, monthly drinking water samples were collected from one indicator location and from the Oceanside control location. Samples were analyzed for tritium, gross beta, and naturally occurring and SONGS related gamma emitting rad i onuclides. There is no drinking water pathway for liquid effluent at SONGS. No stat i on related radionuclides were detected in drinking water during 2017. Gross beta activity was identified in some samples, but gamma spectroscopy identified only natural radionuclides. The operation of SONGS had no impact on the environment as measured by drinking water. 5. Shoreline Sediment (Beach Sand) Beach sand was collected semiannually in 2017 from three indicator locations and from a control l ocation situated in Newport Beach. After collection , the samples were analyzed for plant related and naturally occurring radionuclides. Only naturally occurring radionuclides were detected in all samples. No plant related radionuclides were reported above the MDC. The operation of SONGS had no impact on the environment as measured in beach sand. 6. Ocean Bottom Sediments Ocean b ottom sediments were collected from three indicator locations and the Laguna Beach control l ocation. The samples were analyzed by gamma spectral analysis for naturally occurring and sta t ion related radionuclides. Only naturally occurring radionuclides were detected in ocean bottom sediment samples collected during 2017. Four non-ODCM ocean bottom sediment samples were obtained from two locations, Unit 2 outfall conduit and Unit 3 outfall conduit. The conduit samples were collected to measure the radiological environmental effect potentially resulting from the minor conduit leakage. Dur i ng 2017 , all conduit sample analysis results were below the MDC for station related radionuclides. The operation of SONGS had no impact on the environment as measured by ocean bottom sediments. Page 134 APPENDIX B 2017 AREOR 7. Marine Species (Flesh) Species of adult fish , crustacean and mollusks were collected on a semi-annual basis at the SONG S Unit 1 outfall , the SONGS Units 2/3 outfall and from Laguna Beach control location. The flesh portion of each sample type was analyzed for gamma-:emitting station-related and naturally occurring radionuclides. The results were subsequently reported to SONGS in terms of wet s ample weights. Because results based on a wet sample weight are most useful for calculating doses, the results of sample analyses are summarized in terms of "as received" wet weight s. No plant related radionuclides were detected above the MDC. Natura ll y-occurring radionuclides were detected in marine species samples collected during 2017. The operation of SONGS had no impact on the environment as measured by this sample mediu m. 8. Local Crops Fleshy and leafy crops were collected semiannually in 2017 from the SONGS garden and from the control location 21 miles SE from SONGS Units 2/3 midpoint. Tomato, cabbage, sorrel and yellow squash were sampled in 2017, and only naturally occurring radionuclides were identified. No plant related radioactivity was detected. It is concluded that in 2017 SONGS had no measu r able impact on local crops. 9. Soil To determine if there is evidence of a build-up of radionuclides in the land near SONGS, indicator soil samples were collected from Camp San Onofre, Old Route 101 , Basilone Road and th e East Site Boundary (Former Visitor's center). A control sample was obtained from Prince of Peace Abbey in Oceanside. Surface soil was collected from all indicator and control locations at the depth of 3 inches. The sampling protocol is consistent with the procedure descri b ed in HASL-300. Soil sampling is not required by the ODCM. Soil sa m ples were analyzed for naturally-occurring and SONGS-related gamma-emitting radionuclides using gamma spectral analysis. The 2017 soil samples showed measurable levels o f naturally occurring radionuclides. Cs-137 was detected in two indicator samples (0.042 and 0.193 pCi/g) and the control sample (0.046 pCi/g). Cs-137 in environmental soil samples at these levels is often attributable to residual nuclear weapons testing fallout or to the Fukus h ima accident. Cs-137 and strontium-90 (Sr-90) were detected in soil profile analyses conducted in previous years. These radionuclides are mostly due to the nuclear weapons testing fallout depositing on soil and retention of these radionuclides due to their long half-lives. The presence of Cs-137 in the ind i cator and the control locations in previous years supports the conclusion that the major source of this radionuclide is fallout deposition. During 2017 , the operation of SONGS did not have a measurable effect on the environment as measured by soil samples. Page 135 APPENDIX B 2017 AREOR 10.Kelp Kelp was collected in April and October of 2017 from the San Onofre kelp beds, San Mateo kelp bed , Barn kelp bed , and from the Salt Creek control location. Upon collection , the samples were analyzed by gamma-spectral analysis for naturally-occurring and station-related radionuclides. Naturally occurring radionuclides (such as K-40, Th-234 and others) were detected in all samples in 2017 , from both indicator and control locations. lodine-131 was identified in all samples from April 2017 , in both the indicator and control locations. 1-131 was not detected in any of the October 2017 samples , however. lodine-131 is a relatively short-lived radion u clide with an 8-day half-life. It is produced and released from operating nuclear power plants. SONGS is shutdown with the nuclear fuel stored in spent fuel pool so 1-131 is not being genera t ed. That , along with the fact that the 1-131 was identified in either all samples (April) or no samples (October) indicates that these positive results are not from SONGS operations. 1-131 has been detected at indicator and control locations in previous years. 1-131 data in ocean water samples near SONGS have been consistently indistinguishable radiologically from background. The northern control locations are too far away and in the predominantly upstream current direction for the 1-131 activity to be attributable to SONGS. The Salt Creek control kelp sample station near the San Juan Sewage Plant outfall has consistently yielded the highest 1-131 activity measured in kelp and has consistently yielded 1-131 above radiological background. Figure 10 shows a relatively close correlation between indicator and control locations over an extended period, further supporting the assessment that the likely source for this radionuclide is external to SONGS. (Note: Figure 10 includes all 1-131 results, including those that are below the MDC.) 1-131 i n Kelp 1.40E-01 ail :::,. u l.20E-01 l.OOE-01 .:!:: 8.00E-02 > .t:: > *t 6.00E-02 rtl 1 4.00£-02 2.00E-02 O.OOE+OO 2013 2014 2015 2016 -AVC 01-San Onofre -AVC 02 -San Mateo -AVC 03-Barn Figure 10 131 in Aquatic Kelp 2017 2018 AVC OS (Control) Refer to Figure 11 for the relative location of the kelp beds , the San Juan Sewage Plant outfall , and the SONGS outfalls. The data strongly support the conclusion that the 1-131 detected in kelp is attributable to medically administered 1-131 discharged through the San Juan Sewage Plant outfall and not to the operation of SONGS. Page I 36 APPENDIX B SONGS 2014 Kelp Samples . """' ~r 0 unita 2/3 Midpoint

• s,,n J..-n Ovlfol --o.iru-Figure 11 -Kelp Sampling Locations

11. Correlation of Effluent Concentration to Concentrations in the Environment 2017 AREOR In accordance with 10 CFR 50 Appendix I, Section IV, B.2, data on measurable levels of radiation and radioactive materials in the environment have been evaluated to determine the relationship between quantities of radioactive material released in effluents and resultant radiation doses to individuals from principal pathways of exposure.

REMP samples, both terrestrial and marine, indicated no accumulation of plant-related radioactivity in the environs. No samples exceeded investigation levels and, in fact, all samples with detectable activity were not statistically different from controls and were therefore attributed to non-plant-related sources-past nuclear weapons fallout , Chernobyl , Fukushima, and medical iodine releases in sewage. As such, the operations of SONGS did not have any measurable effect on the environment. The regulatory requirement to evaluate the relationship between quantities of radioactive materials released in effluents and the resultant radiation doses to individuals may be summarized by the following conclusion

Page 137 APPENDIX B 2017 AREOR Effluent program releases are evaluated annually to determine the receptor(s) with the highest hypothetical dose. The 2017 REMP sample data indicated no accumulation of plant-related radioactive materials in the offsite environment , thereby lending confirmation to the adequacy of the in-plant effluent controls program and dose assessments. Page I 38

---,. APPENDIX B 2017 AREOR B. Statistical Summary of REMP Data For 2017 Table 16 -2017 Quarterly Gamma Dose ~----* ----~-_. *-*----. ---* ',: t _7'.,. -,-,. ,,,. -,s -* ,, "( . *r. ' , --,***w ., * *, "*'. '~"'" ; . * ,.,_, -"'!. .,. ,*l,'1 '1 ,-'~, ** " ~~,*"=!/,_".'-~'-"~:/"'

• .,,q,* ..... ... *

,. , ',. _.. . . : ., :** *::, .. * .. ,,,,."' :~ -.. ' -* .. ,,. .. : . '{. <~~.,,"" ';.;-~\A~,/ .. f.~\f~{"-"~\t~~-. ' * * -., "* <-~'-} '~ ~:, ~-,-. *-., ;\' ,, ., TLD Southeas t S i te Dose per 91 days Gamma 195 5 16.7 (151/151) Boundary (Office Bldg) 20.8 (4/4) 17.0 (44/44) 0 (mrem/qtr) (9.7 -21.5) 0.1 Mi. ESE (19.9 -2 1.5) (13.1 -20.7) NOTES a Indicator locat i on TLDs include all REMP TLDs 5.0 miles or closer to SONGS 2/3 midpoin t b Control locat i on TLDs i nclude all REMP TLDs more than 5.0 miles from SONGS 2/3 midpoint c TLD data excludes QC TLDs , transit dose TLDs , and ISFSI TLDs Table 17 -Weekly Airborne Particulates Gross Beta ----. ' . . ...... ,. . *. -',,, .. .,,.,,,,, ... ~,-,~""'""'""".,;.,g,,;,,~- .... .... ----.. -. -_ -_ -_: ----:_: ~=-;-~~ :=\*: .. ;.~; ~-:.;~:~~;:_ -. :r:-;:*-r?_i::t** ~-.; > ~:;: :~!1 ------.. -----.. ----~ *_ __,__!._ ~~*-*"--:X~~~~~

, -----~ * * ..

.~ _:_* ~" -~*-_-*-~:-*\;,~.:::~:~"t't

---

. Air Filter Inhalation Gross Beta 415 0.01 0.025 (363/363) Mesa EOF 0.7 M i. NNW 0.029 (52/52) 0.026 (52/52) 0 (pCi/m 3) (0.009 -0.096) (0.013 -0.096) (0.008 -0.091) Page 139

--. ' APPENDIX B 2017 AREOR Table 18 -Weekly Radioiodine 1-131 Activity .... ,,~,*y-*-*, '" ,, *>'. ' ...... , *. ~-, .. ,~.,cy,-,-.~***ff-~ -,. '"r ... _ ,;:-.* --... _....~ -; ... ".,. .... ;**1';;* . . .. -. -. ----~-* .. , *-.---...... -~-*-.;._ .-~-----*-*

---

~----"~

'~ "" .. .. . . ' " * \'. .*; * :_ * ,* .::.: * -~-',. J>i ;; , ~~~,1*jfi:C;':,~,(:~:ri~~.1 . Activated Charcoal Inhalation 1-131 415 0.07 < LLD c (0/363) < LLD < LLD < LLD (0/52) 0 (pCi/m 3) NOTES a This table summarizes the weekly air iodine-131 cartridge data above the MDC. lodine-131 has an 8-day half-life. With reactor shutdown , it is no longer a radionuclide attributable to SONGS b LLD is the a priori limit as prescribed by the ODCM. c The Term <LLD as used means that results had no detectable activity above the minimum detectable. Table 19 -Quarterly Composite Airborne Particulate Gamma Activity . ....... -**-~-'"***-.----**-'>JI*---. ...........

• . :.: .. ;f*; : .* : ... * */};;*it+/-i~lf ' Air Filter Inhalation Gamma See < LLD < LLD (0/4) 0 Isotopic 32 < LLD (0/28) < LLD (pCi/m 3) Table 1 NOTES a Natural occurring radionuclides (K-40 , Th-234 and others) were observed in quarterly composite air samples in 2017. Page 140

' , " ' ' APPENDIX 8 2017 AREOR Table 20 -Monthly Ocean Water Activity (pCi/L) < LLD (0/50) < LLD < LLD < LLD (0/12) 0 NOTES a Natural occurring radionuclides (K-40 and others) were observed in samples in 2017. Table 21 -Quarterly Ocean Water Tritium (pCi/L) Tritium < LLD (0/12) < LLD < LLD < LLD (0/4) 0 Table 22 -Monthly Drinking Water Activity . ' ., ,*,. ' ... *--*-*-**** ., *..... *-*'""'*"--~- ' '( ,t,:, * --* ""¥ _ '-'.-<, W,,e's'~;,.~~f~} t"1~t,1;*""!"i,,._** ., ; ,;**;<:-<&

• • **'", -;i!;~---... ::'..:::__,, *. -: ,., ; '.L',' ',: ... st -----Drinking Water Gamma See 24 < LLD (0/12) < LLD < LLD < LLD (0/12) (pCi/L) Isotopic Table 1 Drinking Water Gross Beta 24 4 < LLD (2/12) Oceanside City Hall 3.71 (6/12) 3.71 (6/12) (pCi/L) 15.6 Miles SE b 2.37-5.64 2.37 -5.64 Drinking Water H-3 24 2000 < LLD (0/12) < LLD < LLD < LLD (0/12) (pCi/L) NOTES a Natural occurring radionuclides (Pb-212 , Pb-214 , Th-228 , Th-232 and others) were observed in samples in 2017. b The location with the highest annual mean for dr i nking water gross beta is a control location. 0 0 0 Page 141 APPENDIX B 2017 AREOR Table 23 -Semi-annual Shorel i ne Sed i ment Gamma Activity (pC i/g) ' ' " ,,., ' ' ' . ' ., ' " --; "' ,, .. ,. ,, .. """'*~-~, *:a . . . -. -** -___ _,, __ -------~-------

,._ ---. ----.----:----* ----* .. -~ " ... " :-: ... :'.\:_;;/gl Beach Sand See Direct Exposure Gamma < LLD (0/2) 0 Isotopic 8 < LLD (0/6) < LLD < LLD (pCi/g) Table 1 NOTES a Natural occurr i ng radionucl i des (Pb-212 , Pb-2 1 4 , Ra-226 and others) we r e observed in samples in 2017. Table 24 -Semi-annual Ocean Bottom Sediment Gamma Activ i ty (pCi/g) f.' -._. '** ., ,._ -r":_*:*":-_:-~:.?;*,t?~!'~~r:+:a ,* -----"S~ -------. -.--... -. .. ' ' .. ' . ----* . -Waterborne Ocean Bottom Gamma See Sediment Isotopic 14 Table 1 < LLD (0/12) < LLD < LLD < L LD (0/2) 0 (pCi/g) NOTES a Natural occurring rad i onuclides (Pb-212 , Pb-2 1 4 , Ra-226 and others) were observed in samples i n 2017. Page 142 APPENDIX B 2017 AREOR Table 25 -Semi-annual Marine Animal Gamma Act i vity (pCi/g) California Mussell Gamma See < LLD (0/4) < LLD < LLD N/A 0 4 Ingestion (pCi/g) Isotopic Table 1 Keyhole Limpet Gamma See N/A < LLD < LLD < LLD (0/2) 0 2 Ingestion (pCi/g) Isotop i c T able 1 Spiny Lobster Gamma See < LLD (0/4) < LLD < LLD < LLD (0/2) 0 6 Ingestion (pCi/g) Isotopic Table 1 Sheephead Gamma See < LLD (0/3) < LLD < LLD < LLD (0/2) 0 Ingestion (pCi/g) Isotop i c 5 Table 1 Kelp Bass Gamma See < LLD (0/2) < LLD < LLD < LLD (0/1) 0 3 Ingestion (pCi/g) Isotopic Table 1 Black Perch Gamma See < LLD (0/1) < LLD < LLD N/A 0 1 Ingestion (pCi/g) Isotopic Table 1 NOTES a Natural occu r r i ng rad i onucl i des (K-40 and o t hers) were observed i n samples in 20 1 7. Table 26 -Sem i-annual Local Crops Gamma Activity (pCi/g) ,. ' ,.,.,. r,~ .... ~-"; t;-'"f<'<<"-:"':- '--'< --,~, r ~* ..... :.~:-.~~'?;-~

.t

,~*:~--. ,, ! ' ' .;_~j""'~.,~

• A" ~J ..... ~<< ,* '"ft f .. ~;},~ ~,., **.~\tr***:"'..

'** .... ~' ' r .,. ' . " . Sorrell Ingestion Gamma See < LLD (0/2) < LLD < LLD N/A 0 2 (pCi/g) Isotop i c Table 1 Tomato Ingestion Gamma See < LLD (0/2) < LLD < LLD < L L D (0/2) 0 4 (pCi/g) Isotop i c Table 1 Cabbage Gamma See N/A < LLD < LLD < LLD (0/2) 0 2 Ingestion (pCi/g) Isotopic Table 1 Yellow Squash Gamma See < LLD (0/1) < LLD < LLD < LLD (0/1) 0 2 Ingestion (pCi/g) Isotop i c Table 1 NOTES a Natural occurr i ng radionuclides (K-40 and others) were observed in samples i n 20 1 7. Page 143 APPENDIX B Table 27 -Annual Soil Gamma Activity , 3" Depth (pCi/g) Gamma See < LLD (0/1) Isotopic 4 < LLD (0/3) < LLD < LLD Soil Direct Table 1 Radiation (pCi/g) Cs-137 0.18 0.117 (2/3) Old Route 101 3.0 Mi. 0.193 0.046(1/1) 4 (0.042-0.19) ESE (0.193 -0.193) (0.046 -0.046) NOTES a During 2017 naturally occurring K-40 and other radionuclides were detected above the MDC in most samples. Table 28 -Semi-Annual Kelp Gamma Activity (pCi/g) Kelp Ingestion (pCi/g) Gamma Isotopic 1-131 8 8 See Table 1 0.06 < LLD (0/6) 0.113 (3/6) (0.008 -0.113) < LLD San Onofre Kelp Bed 1.5 Mi. S < LLD 0.133 (0.133 -0.133) < LLD (0/2) 0.008 (1/2) (0.008 -0.008) NOTES a 1-131 was confirmed above the MDC in 4 of 8 kelp samples. 1-131 is known to be a constituent of sewage plant discharges due to medically administered 1-131. b During 2017 naturally occurring K-40 and other radionuclid es were detected above the MDC in most samples 2017 AREOR 0 0 0 0 Page I 44 2017 AREOR APPENDIX C.

SUMMARY

OF QUALITY CONTROL PROGRAMS Page I 45 APPENDIX C 2017 AREOR A. Summary All REMP samples are collected, shipped , and analyzed in accordance with NRC Regulatory Guide 4.15. Marine radiological environmental samples are collected by a vendor, MBC Enviro n mental , per the vendors Quality Assurance manual. REMP sample analysis is performed by the Contracted Environmental Analysis Laboratory (CEAL) in accordance with the Labora t ory Quality Assurance Plan. During 2017 the CEAL was General Engineering Labora t ory (GEL). The CEAL for REMP TLDs was Stanford Dosimetry. B. Quarterly Duplicate TLDs SONGS deployed a duplicate TLD package in the same location and canister as TLD 66. The quarter l y dose measured by these separate TLD packages is statistically equivalent. Table 29 -2017 Quarterly Duplicate TLD Data Comparison TLD 66 13.28 +/- 0.83 13.79 +/- 0.72 13.46+/-1.01 14.11 +/- 0.87 TLD 200 13.02 +/- 0.91 13.61 +/- 1.00 13.18 +/- 0.81 14.27 +/- 0.49 NOTES: a. Data is reported as mR per standard quarter+/- 1 sigma C. Annual Duplicate TLDs SONGS deployed a 12-month duplicate TLD package in the same location and canister as TLD 67. The annual sum of the quarterly TLD 67 exposure data is not significantly different from the annual TLD 201 results for the 12 months from July 2016 through June 2017. Table 30 -2017 Duplicate TLD Data D. Calibration of Air Sampler Volume Meters Air sam p lers undergo annual calibration using standards referenced to NIST on all REMP air sampler gas meters. When the gas meters are removed from service , the meter is calibrated and the calibration reports are reviewed for bias. This is an a posteriori review of the gas meter performance to evaluate method bias and to identify possible outlier analysis results. For 2017, the calibration reports for five of the air samplers used in the REMP were reviewed. The as found condition of these samplers were that some (2/5) were negatively biased , up to 28% low (at a flow rate of 1.5 scfm). Others (3/5) were positively biased, up to 22% high. A review of the air particulate beta results over the course of the year did not indicate a particular bias for any particular sampler. The trends in the beta results over the course of the year were consistent regardless of which sampler (location) was being monitored. Page I 46 APPENDIX C 2017 AREOR E. lnterlaboratory Cross-Check Program: The CEAL participates in a number of independent cross check programs, including the National Institute of Standards and Technology (NIST) and Analytics cross-check programs. A summary of the cross-check data is included below. In the 1 5 1 quarter of 2017 , the gross alpha analysis for water samples did not meet the applicable performance evaluation. This condition was i d entified and documented by GEL, via CARR170227-1085. The sample was re-analyzed with an acceptable result. In the 3rd quarter of 2017, the 1-131 analysis for water was not acceptable. GEL CARR170828-1125 documented the issue, and the lab determined that the obser v ed positive bias was an isolated occurrence and the laboratory 's overall process is in control. Per the 2017 Annual Environmental Quality Assurance (QA) Report, GEL was provided two (92) individual environmental analyses. The accuracy of each result reported to Eckert & Ziegler Analytics, Inc. is measured by the ratio of GEL's result to the known value. All results fell within GEL's acceptance criteria (100%) In 2017, the environmental TLDs, routine quality control (QC) testing was performed for dosimeters issued by the Environmental Dosimetry Company (EDC). During 2017, 100% (72/72) of individual dosimeters evaluated against the EDC internal performance acceptance criteria (high-energy photons only) met the criterion for accuracy and 100% (72/72) met the criterion for precision. The CEAL's performance meets the criteria described in Reg. Guide 4.15 and ANSI/HPS N13.37-2014. Page 147 APP E NDIX C F. Analytical Laboratory Cross Check Program Summary tiJ#tl Laboratories

u. a 11be1 h Gtl Cir.1 11 1> TABLE 2 GEL QUAR TE RLY lN TE RLABORATORY COMPARISO January through March 2017 Page6 o f 9 20 1 7 AREOR oel com Page I 48 APPENDIX C 2017 AREOR ma* laboratorles u , haut LG r:1p 1. 011 com Raport Cta.11119 I PT Cilullter I RKalwd ...... ....... Raporltld AaalJIMCI Al:c:apbnce P8rfonUlla Pro1IICII Y a* 0.. ...... .... lnta AllaMa v.-ValH Utnlta E valllabon EZA 4111120 t 6 02/2: 1 11 7 E 1 1 674 Car1r111ge

!>Cl IOclne-1 3 1 9.60 E t0 1 9.67 E+o t D.99 Acceatable EZA 4fll/20 t 6 02/2: 1 11 7 E 1 1 675 MIi k DC IIL slrorrtJum.119 7 . .86Et01 7.4.2 E+o 1 1.06 Accenl;,hle , EZA 41111211 1 6 IJl2!'2 1 n 1 E 1 1 675 MIi k pC L!l. stromlum-90 7.51lEtOD 1.00 E+o 1 0.75 Acceotallle EZA 4111/20 1 6 02/2: 1 11 7 E 1 1 676 MIik DCI/L IOdlne-13 1 1.0BEf02 9.1'4 E+o1 1.1 1 A.-n!:atlle EZA 41111211 t 6 02/2: 1 11 7 E 1 1 676 MIil pCI/L CE!llt.m-1 4 1 1.55EfOG! 1 A3 E+02 1.09 Acceptable EZA 41111211 1 6 IJl2!'2 1 n 1 E 1 1 676 MIik DCI/L am:im.llJm-51 3.29Ef412 2.BO E+D2 1.1 8 A.-nl;,t,le EZA 41111211 1 6 02/2: 1n 7 E 1 1 676 MIil pC I/L cetilll11-1 J4 t.67Ef02 1.78 E+o2 O.!M Aeceptable EZA dfh.'20 1 6 02J2 1/1 7 E 1 1 676 MIil DCIIL cetil1111-1 J7 UJEf(]2 1.2.6 E+02 1.1 3 -le EZA 4th/21l 1 6 02/2: 1/1 7 E 1 1 676 MIik pC V L Ccbalt-56 1.54Ef(]2 1 A6 E+02 1.05 /1.ccepbble EZA 4thl2D 1 6 02/2: 1/1 7 E1 1 676 MIil DCIIL MannanE!iSe,54 1.46EH12 1.29 E+02 1.1 3 -le EZA 4th/21l t 6 02/2 1/1 7 E 1 1 676 MIik pCI/L l ron-69 1.4SEf02 1.2:S E+02 1.1 6 Acceptat,le EZA 41n/20 t 6 02)2 , 1/1 7 E 1 1 676 MIik pC U L ,l lne-65 2.6BEf02 2.44 E+D2 1.1 0 Accealattle EZA 4111120 1 6 02/2: 1/1 7 E t 1 676 MIik l)CIIL Ccball-60 t.87Efll2 1.78 E+02 1.05 Accer:ilable EZA 4flll20 1 6 0212 1/1 7 E 1 1 677 Wate r pCI/L IIOdllne-1 3 1 1.06Efll2 9.18 E+o1 1.1 5 AfleeO!at>le EZA 4flll2D 1 6 0212 1 11 7 E 1 1 677 wat e r IIC V L Certt.m-1 4 1 1'.47Ef02 1 ,J.8 E+02 1.06 AcceDiable EZA 4int21l t 6 0212 1/1 7 E 1 1 677 'W.Jte r DCIIL Cl lll lmlt.m-51 3.0JEf02 2.7 1 E+02. 1.1 2 Acceol""4e EZA 4111120 1 6 0212 1 11 7 E t 1 677 Wate r pCI/L cetil!El-1 34 1.59EIC2 1.7J E+02 0.92 Acceotlt!le EZA 411112D t 6 0212 1 11 7 E 1 1 677 Wate r DCIIL cetilian-1 37 1 1.Jl!EM)q 1.22 E+D2 1.1 3 Aoci>otable EZA 4111120 1 6 02/2 1 11 7 E 1 1 677 Wate r pC I/L Ccbalt*S3 1.49Effl2 1 A2 E+02 1.05 Aooeoiatl4 e EZA 4111.'20 1 6 Ql2J2 1 11 7 E1 1 677 Wate r l!CIIL Man;..... -1.35Ef02 1.25E+02 1.D8 Aooeoiable EZA 4MD 1 6 02J2 1 11 7 E 1 1 677 Wate r pC I/L l ron-69 t.35 E f00 1.2 1 E+D2 1.1 2 Aooeo1""4 e EZA 4111120 1 6 IJ!l/2 1 11 7 E 1 1 677 W<1te r pC I/L Zlne-65 2.6 1 E ffl2 2.36 E+02 1.1 0 Acceoiable EZA 4lnl2D t 6 D2J2 1 n 1 E1 1 677 Wate r pC I/L Cllllillt-60 f.76E*412 1.72 E+D2 1.02 Acceotlble E RA 1 61/2017 2127/2017 RA0-1 08 wate r pC I/L Bar111111-1 3l 86.7 85.6 72.D-94..2 Acceotlble E RA f 61/20t7 2177/20 17 RA0-1 08 wate r DC IIL cetilll11* 1 34 51.2 52.6 42.4-57.9 Aa:Po1;,,t,1e E RA 1 111/2017 2127/2017 RA0-1 oa W.ite r pC I/L cetilll11* 1 J7 11 8 1 1 2 1 0 1 -1 26 >.ooepbl,le E RA 1 61 / 2017 2127/2017 RA0-1 08 IN,ate r DC IIL OOtl al l-al 11 8 1 1 3 1 02-1 26 ...,,,,.._e E RA 1 61/2Dt7 2127/20 17 RA0-1 08 wate r pC I/L lr!C-65 2D:2 189 170-222 """"'11:>llle E RA 1 111/2017 2127/2017 RA0-1 08 Wate r DCIIL Gro65 AIDIE 71.6 52.3 27.3-65.S Moot E RA 151/2017 2127/20 17 RAf>.1 08 W.ite r pCI/L Gro65A!plli3 69.6 52.3 27.J-65.S Moot E RA 151/2017 2127/20 17 RA f>.1 08 wate r DCIIL Gro65Beta 37.6 4 1.6 27.7-49.D ~e E RA 1 111/20 1 7 2127/20 1 7 RAD-1 08 Wate r pCI/L Rad l lllll-226 1 2.3 1.2.7 9.48-1 4.7 Acceotable E RA 1 5112 0 t7 2127/20 1 7 RA f>.1 08 wate r DC UL Rad l um.,226 1 3.1 1 2.7 9.48-1 4.7 ~e E RA 1 lil/20H 2127/20 17 RAD-1 08 Wate r pC I/L Rad l lllll-22.6 1 4.2 12.7 9.46-1 4.7 """"'11:>Ne E RA 1 51/2017 2127/20 1 7 RA0-1 08 Wate r llC IIL Radlum-22.8 6.31 6.2 J.83-8.DII .. """""abl e E RA 161/2017 2127/20 17 RA0-1 08 Wate r DCIIL R;ld l lllll-228 6.36 6.2 3.83-8.DB Acceol""4 e E RA t&t / 2017 2127/20 17 RA f>.1 08 Wate r llC I/L U ran\Jmf~\ 1 2.2 12.6 9.9 1-1 4 , 4 "'"""""""'e E RA 1 61/2017 2127/20 1 7 RA0-1 08 Wale r U<IIL ~*~-1 9.7 18.4 14.5-2 1.1 Alloeobl>le E RA 1 lil/2Dt7 2127f20 17 RA0-1 0 8 W<lte r UQ/L ~1 N11 1-1 8.9 1 8A 14.5-21.1 Acce..htv e Page 7 o f 9 Page I 49 APPE N DIX C 2017 AREOR tilll Labo atories LL rl '11 nb r O' T h e G l:L t.rJ IIP

• oe1.c001 -,-,~ -Raport CIOllltll 1 PT Gllatert ll-'Wd ....... ..... RaporleCI ANWWCI A.ccap1anca Parfol.-Pravldl Ya* Dolt ........ .... Ul1lta AnaMa YUM Value Llmlhl E.ltalUallon ERA 1 15l/20 f 7 2127!20 17 ~1 08 Wate r llCLIL 'T ritium 1 130D 1:2500 tD90D -13800 Acceotible ERA 1 15l/20 1 7 '2mlm 17 ~1 08 Wate r llCI/L Trt!Jum 1 1 60D 1250 0 109 0D-13800 &"""'*""'e ERA 1 5l/2Qf1 2127!20 1 7 HAl>-1 08 Wate r !>Cl.IL slron!JurTH19 60..2 55.5 44.3-63.2 ~e ERA 1 51 1 2017 2.l'l7/2D 1 7 RA0-1 08 Wat.e r llC LIL strvnllum"89 54.S. 55.5 44.3-63.2 Accenl:mle ERA 1 6l J 20 1 7 2.!27/20 1 7 ~1 08 Water !>CUL stronlkJm-go 35..9 43.1 31.8-49.5 ~e ERA 1 51/2017 2177/2'0 1 7 ~108 Wate r l>CLIL Slrontlurn-90

-:n.7 43.1 31.B-49.5 Accent.lile Page8 o f 9 Page I 50 APPE N DIX C lCU1! laboralorieS 1L c a rib r o* T he Gtl Clr:iup *1. TABLE2 GEL QUARTERLY INTERLABORATORY COMPARISON Apri l through June 20>17 Page 6o f 12 2017 AREOR oet.com Page I 51 APPENDIX C 2017 AREOR *mill Labora ories u , a mb r l h l OE L G r lul) o el co --.---lllpOlt .._,.._ P1' a.111-, ......... . ... ...... GB. ic-...... Pnllllllllf y., .,. ..... .... u..t a-...., IIIICldl ¥11111 .... .. E........_ EZ/1 fW2017 07/07/17 E118 1 8 Cartrlmie IIC I l od l Be--131 9.93E 4M 9..46Ef.0 1 1.05 Accerriable EZA f&t'2017 07/07117 E 11819 MI i l l>N J1 strma.u n-8!1 8.86E&m 9..96 E*0 1 D..89 ..,,,,.,,.,._e EZ/1 tlil/2017 07/0 711 7 E 11819 MI i l errn Slralt.'um-90 1.97Ef0 1 2.,SSEf.0 1 D..77 --e EZA fW2017 07/07/17 E H820 MI i l r>r.1!1 I DdlBe--131 9.57EfD1 !l .. 68E*G 1 11.99 ~e EZ/1 Utl20 1 7 07/0 7117 E 11820 MI i l ""'" CEl1Um-1 41 1.2 1 Ef02 U 9E*D2 1.02 AccenbNe E Z/1 1W2 0 17 07/07117 E 11820 MI i l BCl/l Ctlroll1Um.S 1 f.7Ec.m 7 1 2E*D2 D..83 -e. EZA 1&t'2017 07/07117 E11820' MIil OCI IL CMll..lm-1 34 1.7 1 Ef02 U9Ef.02 0.9 Aooeotallfe EZ/1 t W2017 07/07/1 7 E11820 MI i l BCl/l CSlm-1 37 23 1 E4l!Q 2..27Etll2 1..112 -e EZA 1&t'20 1 7 07/0 7117 E11820 MI i l l>CIIL Cei>alt.S8 t.8!1Ef-02 1 .. 78Ef.!l2 1.06 -e EZA t&t'20 1 7 07/07117 E 11820 MIil l>Cl/l. Manaa-54 274Et02 2A9Et-D2 1.1 AcceplatJle EZ/1 1W2ll 1 7 07/07 11 7 E 11820 MI i l r>Cl/l l'00-59 1.35ct02 1.27Et!l2 1.06 Acceotlble EZ/1 t&t'20 17 07/0 7117 E 11820 MI i k pCl/1. Zin~ 3.22Et02 2..96Et!l2 1.09 AttoPnt"'1lle EZ/1 tW2ll17 07/07117 E11820 MI i l OCl/1. COiia~ 2.85ct02 2.93Etll2 11.97 Acceotlble EZA f6112ll17 07/07117 E1182 1 Wate r l>Cl/l lodlne-131 9.6EEMl1 li.79.E.0 1 1.1 -e EZA 161.'20 1 7 07/07117 E 1182 1 Wate r pCI/L CerlUm-1 4 1 1.24Ef02 1..19 E+ll2 1 .. 0:S AcceplatJle EZA tW2ll17 07/07117 E 1182 1 v,ate r llCl}l. CITilmlUm.S 1 2'.43Et02 2.11Etll2 1.t5 ~e EZA t6112ll 1 7 07/07117 E1182t Wa!E r DClll Ceia.Jm-1 34 1.84Ef02 1..86Ef.!l2 D..98 -e EZA 16112 0 17 07/0 7117 E1182 1 Wate r pCI/L Ce61Jm-1 37 2.(!IEt-112 2..2f>E+D2

1.1 Acceotlble

EZA f&t!2017 07/07/1 7 E 1182 1 wate_r oCI IL Cobalt.SS f.8EEt02 1.77Etll2 1..0 6 AccetJtable EZA t&l.'2017 07/07117 E 11821 v,ate r pCI/L Mang.inoe&e-54 2.7!1Et02 2..45E+D2 1.13 Accl!Dlallf e ED. 16112D17 07/0 7/1 7 E1182 t Wate r i>CI IL l'00-59 UEEt02 1.27E+ll2 1.15 Aa:ent3ble EZA t5/J20 1 7 07/0 711 7 E11821 Wate r i>Cl ,'l Zin~ .l.36Ef-02 2.95E+IX1 1 .. 1 4 Aaler!table EZA t&l.'20 1 7 07/07117 E 1182 1 Wate r oCl/1 CObalHiO 3.07Ef-02 2.92E+02 1.05 Am<>lllable MAPEP.1 7* MAPEP 211<1/20 1 7 06/131 1 7 M3S36 SO I B~ Amerleltn-24 1 65..7 67J) 46.9-fil'.1 Aaleotlble MAPEP-1 7* MAPEP 211dl'20 1 7 06/13117 MaS36 SO I B!IIICn CPs!l*m-1 34 1 470 1 5:50 11)65-20 1 5 ~e IMPEP.1 7* MAPEP 211<1/20 1 7 06/1 3117 MaS36 SO I 8!111C<1 Ce41m-1 37 679 6 1 1 428-794 AalPnt.bie MAPEP..17* F.al6e Po6 MAPEP 2n.<1/20 1 7 06/13117 Mas36 SO I B IIIK<1 Col>.ilt--57 11.8 1 2 Te6t Nllll>Olable MAP E P.1 7-MAPEP :211<1/20 1 7 06/1 311 7 Mas36 Sl:I D Bfl'.KG Cei>alt-60 958 Ht 624*1 1 58 Accerrta1>1e MAPEP-1 7* MAPEP :2r1<1Q0 1 7 06/13117 Mas36 so n B""'" ron.ss 804 8 1 2 568-1 056 A-e MAP E P.1 7-MAf>EP 211<1/2017 06/13117 MaS36 SO I 8(111(11 ManQ:ane~ 1 000 967 6n-1 257 AcceDtlble MAP E P.1 7-F.al6e Po6 MAPEP 2ndl'20 1 7 06/13117 Mas36 SO I Bfl'Kll NlcleHi3 -.46 Te6! Acceptallle MAPEP.1 7* MAPEP 2n<1/20 1 7 06/13117 MaS36 SO I Bfl'l(q PlulonlUm-238 D.,574 0.4 1 Sen!;. E\laL M>lll'Dlaillle MAPEP.1 7* MAPEP 211<1/20 1 7 06/1 3117 M3S36 SO I B..., .. ,. P1ulonlllrn-2J912.W 51-2 59.8 41.'~n.7 -e MAPEP-17-MAPEP 211dl20 1 7 06/13117 MaS36 SO I B~ Potali6ltsn-40 624 f,(11 42~78-9 AnlPnlaillle MAPEP-1 7* MAPEP 2ndl2017 06/1 3117 MaS36 SO I 6(111(<1 Slronlllm-'10 548 624 43H!t 1 Aaler!table MAPEP-1 7* MAPEP 211<1/2017 06/13117 MaS36 SO I B!IIICn Tecmelltn-99 64 1 656 4:59-853 Aaleotlble MAPEP-1 7-MAPEP 2nc1fl0 1 7 06/13117 MaS36 SO I Bfl'Ka U-2341233 56_9 48.1 J3.Hi2.5 -allle Page 7o f 12 G L Page I 52 APPENDIX C 2017 AREOR ii r,t) r O hll Gf.L Gr Ju p I oet com IIIINNt ...._...._ PT au.w , bcll¥NI ..... ...... Ga .... ....... y-.,... ...... .... Ulllt AalMl/lllldlll ,,_ ...... Raio E......_ MAP E P..17-MAP6? 2'1<1!2017 0611J.117 Mi1S36 SO I Bla'KQ tJr.ln l in.-ZJ8 53_9 48.ll .14 .. 2-63..7 ADC:eaiable MAP E P..1 7-'Fal5e P'o6 MAP6P 2ndl20 1 7 06ltJ117 MilS36 SO I B""'" Zi nc~ -4.0 T e&! .........,tallle MAP E P.17-0.800'0 0..846 0.592-t.1 MAPEP 2ndtl(l'17 D6l1Jl17 Maw36 Wate r --Amerltltn-14 1 AcceotltJl e MAPEP..1 7-0..037 F.al6e P'o6 MAPEP 2ndl201'1 IJ6/t Jl17 Maw36 Wate r --Cemm-1 34 Ter.t Acoeotlllte MAP E P..17-1 22 11.1 7.8-14.4 MAPE? 2ndl20 1 7 D6 l 1Jl17 Maw.li6 water BQ, 1.. Ce&\Jm-1 37 Aaleaiable MAPEP..1 7-29..0 28.5 MAP6P' :111dt2017 D6 l fJl17 Ma"'1J6 Wate r Ftnl'I Cot>a lt-57 20: G-37.1 ~e MAP E P.1 7-1 2.8 1 2,l 13..6-1 6.0 MAPEP* 2ndl2017 D6l1Jl17 Ma'NJ6 ware r -cttia~o ADC:enbllle MAP E P..1 7-245 249 MAPEP :111dl20 1 7 D611Jl17 Ma'l'IIJo wate r Boll 11¥Cll'.1Xlen...J 17 4~4 Acoeolatlle MAP E P..1 7-2.111 1.7 Senli. &al.. MAPEP :111dl20 1 7 D611Jl17 MaVi/36 Wate r Boi l. l mn-55 Aa:eotible MAP E P..1 7-1 5.7 1 4.9 1 0.4-1 9 , 4 MAPEP :111d/20 1 7 06/1Jl17 Ma'IVJ6 Wate r Ftnl'I Manoanelil!-54 ADC:eot.>N e MAP E P..1 7-13.6 1 22. 8.£-1 5.9 MA.PEP* :111d12'11 1 7 IJ6/tll17 M.t.'1136 Wate r Boll NlekfHiJ Aaleaiallle MAPEP-17-11..635 D.70J D.492--0.9 1 4 MAPEP 2ndl20 1 7 IJ6/f3117 Ma','IIJo Wate r BQ, 1.. Pll.llonlUm-236 ADC:eDiallle MAP E P..1 7-D.841 Q.!J34 D.654-1.2 1 4 MAPEP 2ndl2017 IJ6/1Jl17 Maw36 Wate r --Pt uton1U m-Z3!!12.40 ADl:eDlabll! MAP E P..17-276 254 1 7B-3JQ MAPEP :111d/20 1 7 06/1Jl17 MawJo wate r -Pofa&&ltn-40 ~e IMP E P..17-D.443 0..504 D.353-0.655 MAPEP :111dl20 1 7 06/13117 Ma'iVJ6 ware r Boll Radlllm-226 ~e MAP E P..1 7-9.27 1 0.1 7.MJ.1 MAPEP* 2nd!l0 1 7 06/tJ/1 7 Ma'tllJ6 Wate r Boll Slran!aim-90 Aaleotlbie MAPEP-1 7-5.111 6.~ MAPEP* 2nd!l0 1 7 06/13117 Ma','IIJo Wate r Bai\. Tedlnetll.llll-9!> 4.3B-8.13 ADl:e 1J tll>le MAPEP-17-1.11 1.1 6 0.81-1.5 1 MAP E? 2ndl20 1 7 06/tJ/17 MawJ6 Wate r Rlll1 lkall l um-234.1233 AttoPn1:m1e MAP E P..17-1.16 1.20 OJ!4-1.56 MAPEP* :111dl20 1 7 06/13117 Maw:36 Wate r Elnll tJr.ln l tn-238 Aml'Di.mie MAP E P-17---0.0SD$ Fallie Poli MAP6P :111d!l0 1 7 06/1Jl17 MaWJ6 Wall!r BQ/1.. Z)nc,65 T E!!i t """"'tabl e MAP E P..1 7-Fal&e Poli MAPEiP 2ndl20 1 7 06/tJl17 x:a:WJ6 Wall!r Boll_ l odlne-129 O.Cl 1 TE!it Aa:ent>ble MAPEP-1 7-D.05! 11..0623 D.0436-MAP6P :111dtl017 06/1 Jl17 RIIFJ6 -un1,;;amn1e tkan l tn-235 D.Cl8 1 0 At>rlPrlbhle MAP E P..1 7-8.49 6.6 6.0-1 1.2 MAPEP 2ndtl017 D6/1 Jl17 RIIFJ6 Flll!f tJl1/l;;lfflCle lkan l l.lll-238 Aml><>lable MAP E P..17-8.55 3.7 6.1-1 1.3 MAP E P :111llll0 1 7 06/1Jl17 R!lFJ6 Faer ~le Ur.¥11Um-T o&al ~ble MAP E P..17-0.0386 D.0376 0.0263-MAPEP 2m l/2017 06/tJ/1 7 RIIFJ6 Flier Bol5amlll,;, AmentflEl , , 24 1 0: 0489 ~Ille MAPEP-17* 1.38 1.42 MA.PEP 2nd/20 1 7 D6/t3117 RIIFJ6 I_,,, Rn!D m nle C1!61Jm-1 J4 0.99-1.115 """"'tlbll! MAPEP-1 7-D.781 0.685 D.48(1-{l.89 1 MAPEP :111dtl017 06/1 3117 RIIFJ6 mer Rnl=mnle Cewm-137 ~"'11e MAP E P..1 7-1.n 1.70 1.1 9-2.2 1 MAPEiP :111d!l0 1 7 06/131 1 7 RIIFJ6 mer Rnl=mnle Cooo ll-57 ~e MAP E P..1 7-D..86J 0.78 0..55-1.0 1 MAPEP 2ndtl0 1 7 D6 l 1Jl 1 7 RIIFJ6 Rief Bnh.l m nle Cooo!HiD ....,,,.._e P age 8 o f 12 G EL r*lrkiel UG pg ,m ,r t>*i*** ,;,;2911, !!)el~-:o.i.. 1-e-1 ~...,"',11 11 ~.-, ,.,..;111-1 .. .......,.., Page I 53 APPENDIX C 2017 AREOR feJ=i l L ab r a t ories t t

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~;oNe MAP E P.17-D.lD5 D..1 04 D.D73-0.1 J5 MAPEP 211d!l017 1'.11Kt31 1 7 R II F J6 FIiter BQ/6amc,l.e Ul'all l t.m-2J4123l ~e MAP E P.17-D..tD6 D.1 07 D: D75-0.1 J9 M AP E P 211dl20 1 7 06/1 311 7 R l2 F J6 Fli er ..., ,._=""e ~l lnl-2311 A,,r,onl""'e MAP E P.17-1.l4 1.29 0..9-1.68 M APE P* 2nd/20 1 7 DIK13117 R l2 F J6 Filer An h<:>m llle Zl 1'1Mi5 Aocemalll e MAP E P.17-D.OOD4 1 t F ali'ie P'o5 M APEP 211dl20 1 7 06 1 131 17 R IIIIJ6 \k>oPbll!Jll RoJg m ole Amertclum-24 1 Tl!li<t Aoceptlble MAP E P.17-6.56 6..95 4.87-9.GI M APEP 2nd!l0 1 7 06 1 131 1 7 R IIIIJ6 Vf'OPL11fm El!Jh.a m ol" CeaJm-1 34 Aeceplable MAP E P.17* 4.B4 4.60 3.22-5.918 M APE P 2neli2017 06 1 13117 R IIV'.lo """"tal!Oll An1t::1 m llf e CeaJm-137 Aocenbhle MAP E P.17-0.014 1 Fa151! P'o5 M AP EP* 211d/20 1 7 06/t 311 7 R llv.l6 v,,,,.,bUoo Rn 1<;;>mr1e Cc!>alt'57 Tl:S l Accectlllle MAP E P.17-9.33 8.75 M APE P 211dl20 1 7 06/t JJ1 7 R IIIIJ6 IIPnPtiHm Bo}&amClle Cd>a lt-60 6.1 3-1 1.36 Aoceotlble MAP E P.17-3.39 3.23 MAPEP 2ndfl0 1 7 D6lt 3l1 7 R II\IJo VeQelall!lll Bolliamole ...,,""""'e&e-54 2.J.-416 Aoceotllllee MI\P , E P.17-0.0506 IJUJ::198 D.04 1 9-M APE P 211d!l0 1 7 06/U/1 7 R IIVJ6 V"""""on ..., ,., ,~""e P l ulonlllm-2311 omn ~e PMP E P.17* Oc 07S4 D.1189 O c~2-0.1 66 M APE P 211di2!!1 1 7 06/13117 R IIVJ6 \H><l<>btlon An*1£.>mn1 e Plll!Dr11Um-23g.1240 Acceotabi e MAP E P.1 7-1.50 1.75 M APE P 2ndfl0 1 7 06/1 311 7 R IIVJ6 VPoPt.Hm Bohamole SlrCl1 D l.ffl-9D 1.23-2.24 -.,tlbl e M/IP E P.1 7-0.1 9 0.1 79 D.1 25-0.2JJ MAP E P 2ndfl0 1 7 D6lt Yl 7 R II\IJo VeoelaUDrl Bolrwlmllle l.lran l t.m-234J233 ~e MAP EP.17-1.900 D.1 86 0.1 30-0242 M AP EiP 2nd/20 1 7 06/1 3117 R IIVJ6 '"""'lalloo ..,.,.,="' e 1 1 ran 1 11111.-2J8 """"'1f""'e MAPEP-1 7-6.26 5_39 3.17-7.01 M APE P 2nd!l017 06/131 1 7 R CIVJ6 V"'1Pl;d1m Bofliamcl.e ZI~ Acceotalll e ERA 2 ncl/20 1 7 DS/2Jl17 MRAD-26 SO I ""'"" Actlnli.m-228 1 240 1 2 4 11 795 -1720 A cceciabl e ERA 2 nd/2017 DS/23117 M RA0-26 SO I ,,,,,_ AmBlclum-24 1 4l!lll 443 262-582 AmeEltlbl e ERA 2ncl/20 1 7 DS/231 1 7 M~ So l DCl/lQ B?srnl.llll-2 1 2 !329 1 2 4 D 3JD-1~20 Aoceptil>l e ERA 2oo/20 1 7 D S/2Jl17 M RA0-26 SO I nr.l,..n B1:5nVJlll-2 1 4 2790 275D 1 660-396D AoceDlable 57 9 0-ERA 2ncl/20 1 7 05il23/1 7 M RA0-26 SO I ,,..,,,.,, Cewm-1 34 866(), 886D 10600 Aoce-1! ERA 2!Vl/20 1 7 OS/2Jl17 M~ SO I """ll" CE!Qlm-1 37 aJOO 7S O D 5750-9 65D Acce""""'e ERA 2nd/l:0 1 7 DS/23117 M RA0-26 So l --C~IH'iO , 4620 4430 3000-6 1 0 0 ~e ERA 2 ncl/20 1 7 O S/2Jl17 M RAD-'lb SO I nN/l'n L.e ad-2 1 2 1 JOO 1 2 4 11 812 -1 730 Aoce"'""'I! ERA 2nd/l:0 1 7 DSl2J/17 MRA0-26 SO I DCl/ln Le ai:1-2 1 4. lt70 2&90 1 690-43 1 0 ~e ERA 2ncl/2017 DS/23117 MRAD-2ti SO I nr.111'.n Marvrafll!-5'1. cJ8.6 <<1000 0.00-1 0 0 0 Aoceptlbl e ERA 2ndtl0 1 7 0 512J/17 M RAD-'lb SO I nr.flm P I U1llr11Um-236 4"N 6411 390-894 Aa:eDlalll e ERA 2!¥1/20 1 7 OSl2Jl17 MRAD-26 So l DCl/lo P l utonlUm-239 442 484 3 1 6-669 Aa:eDlallle 774D-ERA 2111112.017 OSl2J/17 M RAD-26 SO I ..rtn.n Potl6 6 h El4D 1 1 000 1 0600 14200 --I! J49D-ERA 2ncll20 1 7 0 5123/1 7 MRAD-26 SO I =-Slrmmim-9D 6 1 50 9 1 5D t4SOO Aoceolabl e P a ge 9 o f 12 G l!!lliltor -~ .. Page I 54 APP E NDI X C 20 17 AREOR Meil laboratories uc a rnti r o J h uE.L ti nup aer com IIIPDft PT a..tw , ...... ..... GB. 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UIIII AINMa l ..... v... -RalD E...._ ER.it. 2IICIQ017 05.'23.1'17 MRAD-26 SO I DCl}m Tool1Um-234 3360 1!MO 61't-3GSO Acceclalble ERA 2ndl20 1 7 05.123J17 MRA0-26 SO I r>Cl.tQ 1Jt311 1 11J1-234 1 820 1!!5D 1190-2&10 Accelllable EM 2IICIQ017 05123.1'17 MRADc26 SO I DCl.tn lk.ln l 11J1-234 2030 1!!5D 1 1 90-2&1D Acceot3ble EM 2ndl.l0 1 7 05'2JJ 1 7 MRADc26 $0 1 r,Cl , l'.fl! lkan l llll-234 24 10 1!!5D 1190-2&10 Acce<Jbtlle EAA 2rv:1/2!0 1 7 05123117 MRAD , 26 SO I pa.~ lk.ln l mn-2311 1 800 1 g*40 1 200-2460 AccefJtlllle EAA 2!ldfl0 1 7 05123117 MRAIJ.26 SO I DCl , l:q lkan l mn-238 1 970 1 940 1 200-2460 A.ml>m:llble EM 2IICIQ0 1 7 0512J117 MRAD-26 SO I r>Cl,I.Q Ut311 1 11J1-238 1 4SO 1 940 1200-2460 Accetiltll>le EM 21lC1121D 1 7 05'23 117 MRAD-26 SO I DCl/m UranlUm-T olal !540 3980 2 1 60-5250 AccentlilJie EAA 2lli1/20 1 7 05123117 MRAD-26 SO I DCl.bl UranlUrn-T<<ai 3750 3980 2 1 6'01-5250 Acceot.ble ER.it. 21111!20 1 7 05.'2Yl7 MRAD-26 SO I DCl/la UranlUrn-T olal 4090 3980 2 1 60-5250 Accer:rtal>le ERA 211i112017 05123117 MRAD-26 SO I ~'lq UranJum. T olal 3860 3980 2 1 60-5250 AccentlilJie Ui:anJurn-Tolal ERA 2ndfl0 1 7 05'23 11 1 MRAD-26 SO I 119'lll (m:a6'l 52ro 5BOO 3200-72:90 Accectlble UranlUm-T otal ERA 2ndl1'0 1 7 0512JJ17 MRAD-26 SO I u a..., l mas6 l S42JO 58011 3200-72:90 Aocef'll"'11e Ui:anJurn-T olal ERA 21111120 1 7 05i'2JJ1l MRAD-26 SO I , inr>n (mai;&\ 5000 5800 3200-72:90 Acceni-e UranlUm-Total ER.it. 2IICIQ0 1 7 05123117 MRAD-26 SO I pqllq (mast;) 4440 S80D 3200-7290 Acce<Jbtlle ERA 2ootal 1 7 05i'2JJ17 MRA0-26 SO I ......,,.n ZI~ 702JO 60911 4IIS0-8D9D ~e ERA 2ndt20 1 7 0512J/17 MRAD-26 VPOPU n an DCl/ln Aml!l1dUm-2 , U 17 00 1 860 1140-2470 AmPt'hllle ERA 2ndt2017 0512J117 MRAD-26 ""'1<>1"'1Qll r>Cll:tn ceairn-1 341 1 660 1 83D 1 1 80-2380 AccenhNe ERA 2ndl1'0 1 7 0512 311 7 MRAD-26 """"iatlon ..,,.,,_ CeslJrn-1 37 24 70 250D 1 8 10-MSD ..,,,..,,..,.,,.e EM 2IICIQ017 05123117 MRAD-26 Vf>nP.l.."111nn DC,1:Q C~.ilt-611 1 350 1 39D 959 -1940 AttlPnt:ohle ER.it. 2!1iCll20 1 7 OSl2JJ17 MRAD-26 "°""'""llill ""'l:a CUl1Urn-244 629 Ž 360 -11 ,40 -"'e EM 2n<lt2!0 1 7 05123117 MRAD-26 v-lat!an DCl/ld Mancran ese-54 <32_2 <JOO 0.00-300 Att,>m3ble ERA 2nd1 7 05123111 MRAD-26 Vl'nPlallan r>r.111:n l'l tmnlUm-2.33 2aso 325D 1 940-445D Accent.hie ER.it. 2rw:ll20 1 7 05123117 MRAD--26 -on ...,,,_ l'l lnlnJurn-239 1 990 2 1 5D 1 320-29611 Acce-1! 22JOO-EM 2ndfl!0 1 7' OSl2Jl17 MRAD-26 Vl'nPl.al!on r>r.11:tn PotlS611J'TI-40 30900 J090ll 43400 Accenl'"11e EM 2ncl/20 1 7 05123117 MRAD-26 VM>>L*UIJn ""'*"" Slmll b im-90 70 1 726 414 -963 Accer,1,."'e EAA 21111Q0 1 7 D5123!17 MRAD-26 """'"'"""" N'l,I.Q Uran l ll:!l-234 2720 3090 2030-3970 -e EM 2ni:lt.!0 1 7 0512 311 7 MRA0-26 V-lallCin n.r.i.to l.kan l um-234 3080 309D 2030-397D AcceniEle EAA 2ncl/20 1 7 D512J/17 M RAD-26 VP<1l't.llloo nCl.tQ Uran l um-2J8 .282!11 306D 2040-JllaD Aml><Jiable EAA 2f'll/20 1 7 05123117 MRAD-26 v .. ,11 , b ll OO n.r.i , to Uran l 11J1-238 302!11 306D 2040-JB91l Accenl""'e EM 2f'll/20 1 7 OSl2Jl17 MRAD-26 """"lallon ""'-UranJurn-T ob l 5'J'70 6290 4260-7BJ D A"""""""'e EM 2ndfl0 1 7 05123117 MRAD-26 V-'~IIOII DCl/10 UranJum-Tota l 5690 6290 4260-7BJD .. .,....,,._.e EAA 2ootal 1 7 OS/23J17 MRAD-26 lh>al'taUllll DCI-UranJurn-T Ola l 6238 629D 4260-71330 ~e UranJum-T Olal 6200 -EM 21¥1120 1 7 05123111 MRAD-26 V-'~*an '""""' 1 mas1;1 89 1 0 9250 11700 MY*or,h'hle UranJurn-T Olal 6200-ERA 2IICIQ017 05i231 1 7 MRAD~ veaecauoo ll(Vlq (fflasti) B44l) 9250 11700 Acceotlble UranlUrn-T olal 6200-EM 2ndQ0 1 7 05123117 MRAD-26 VeoetaUan ua'la {ffl:a6') 9000 9250 11700 Allceoiabl e ERA 2ndQ.0 1 7 05123117 MRAD--26 \leoetallan =~ Zlnc:"'65 907 353 6 1 5-1 200 Acceotlbie ERA 200l20 1 7 05123117 MRAD-26 fller r,CI.IFU;>< Aml!l1Clum-24 1 80.6 7&A 47.t -1 03 AttPlll"'1:lle EM 2nda0 1 7 05123117 MRAD-26 Flier DCIIFUer Ce&\Jrn-1 34 H40 11 00 700 -1 360 Accem3llll! ERA 2!1iCll20 1 7 05123117 MRAD-26 Flier l)Q'Fl&r Ceairn-137 1490 1 J9D 1 040-1 B'JD Accem,1ble ERA 2ndl20 1 7 0512J/17 MRAD-26 Flier DC&'Fller Ctlbiil ll-611 1t2JO 1 D30 797 -1 290 AnlPnbihle ERA 2nd1 7 OSl2Jl17 MRAD-26 FIie!' DCIIFl!ef l llli!l ,-515 242 256 79.4-500 AcceCltlble Page 1 0 of12 l'M.t.JM , t 1 n pr ,tiJ ,?ll , T l 7J P a ge I 55 A PP ENDIX C 2017 AREOR i[!lal L.aboratorles u c d n Mb I l hl!I GE L (j r Jup oel com Raport Acn11*-PT au.tar-I R8Clllnll

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S1rmCUm-9ll 52.2 52.4 25-6-78.;5 MCentmie ERA 2111dl2i11'17 0512Jl 1 7 MRAll*26 fDef DCl'Fllter lkiln l llnl ,-'l.14 71.1 73.t 45.3-u o Aecent.1Ne ERA 2ndl20 1 7 OS'231'17 MRAD-26 Flier t!Cllflller L'ran l!E1-2J4 79 73.t 45.3-11 0 Aecemable ERA 2ndl20 1 7 0512 3.11 7 MRAll-26 Flier t!Cllfll t er l.kan l 1111-2J8 70.7 12A. 46.3-1 00 ~e ERA 2ndl2J0 1 7 0512Jl 1 7 MRAD-26 Flier pCl'Flter U!an ll n-238 n.1 72A. 46.4-fOO Aecemallle ERA 2ndl20 1 7 05123.117 MRAD-26 Flier IJCl,'fller Uranlllm-T olal 1 54 t49 82.S-Xll Aecerbbie EM 2ndl2J0 1 7 0512Jl17 MRAD-26 Flier nr.:l;'faer Uranlllm-T olal 1 45 t49 B.2..S.-2Zl Acceptit,le ERA 2rxll20 1 7 0512Jl17 MRAD-26 Flier pCl'FUer UranlUm-T olal 1 59..S. t49 82.5,-227 Acceotatlle Uranlllm-T C!Cal ERA 2ndl2J017 OS/2Jl 1 7 MRAD-26 fDer IK!i'flllEr {ffli366) 230 217 1J9 -306 Acceptit,le Uranlllm-T olal ERA 2!ldl10 1 7 0512Jl17 MR/\0-26 Fil er un, 1'1 111:r {tnil6$l 212 21 7 1 l9-JD6 ~alJIE! Uranlllm-T olal ERA 2ndl20 1 7 0512Jl17 MRAD-26 FD er , rnlFl l ler "'1as6 1 23 1 217 1J9-306 --E! ERA 2lldi20 1 7 051231 1 7 MRA0-26 -"""'"""" 2ll'!C'65 1t 60 984 705-1 360 """""'.,.,.e ERA 2ndl'l0 1 7 05'23.f17 MRAD-26 filer* nC I JR b>r GRl6&Alcl'la 112 85;5 28.6-fJJ Aeceotmle ERA 2rv:1i20 1 7 05123.117 MRA0-26 Aler --* GRl6&1 B e tJ 54-9 45.2 2B.6-65.9 ...._..:vve EFIA 211dm}1 7 05123117 MRAD-26 Wate r ""'I L Ametllctum:-24 1 1 50 1 40 90-1 68* ,........,.,..,.e ER.a. 2m:lfl0 1 7 0512Jl17 MRAD-26 Wate r DCl/1 cewm-1 34 2300 25 1 0 1 840-2680 Aecent>ihle EFIA 2ootll017 05123117 MRAD-26 Wate r DCI/L Ce<611:Jm-137 1 480 1 400 11 90-1 6811 ACcevt:mle ERA 2ndl20 1 7 0512Jl17 MRA0-26 Wate r DCI/L cma lt-60 2S70 2540 2210-2971) Aece01al>le ERA 2n,:11210 1 7 0512Jl17 MRA0-26 Wate r pC L'L too-55 9Z3 984 5137 -1 340 Accefltm!E! EFIA 2oot2017 05123117 MRA0-26 Wate r DCI/L Mana.lllE!6e-54 <6.J6 <<1 00 0.00-100 AmP<lt>Ne ERA 2rv:1i20 1 7 OS/2Jl17 MRAD-26 Wate r pCl1l. P l lllllnlllm-238 1 00 1 28 94.7 -1 5'9 Acceobl>ie ERA 2fl1r20 1 7 05/2Jl17 MRA0-26 wate r pCI/L P l ulcnlllm-2J9 73.J 85.3 66.6-1 03 Aml>Dtltlle ERA 2111112'0 1 7 OS/2Jl17 MRAD-26 wate r pCl ll saooalm-'3D 685 7 1 4 465-944 Aecemallle EFIA 2111112'017 05123117 MRA0-26 W:ate r pCI/L l.kan l-2J4 82..t 90,,} 67.8-11 6 Aoceolable EFIA 2nclf2I0 1 7 0512Jl 1 7 MRAD-26 Wate r DCI/L Lnn l um-2J4 92 90.J 67.4-116 ~E! EFIA 2ndfl0 1 7 OS/2Jl17 MRAD-26 Wate r DCl/1 I..An l mTt-2J4 81.t 9!U 67.8-116 Acceobl>ie EFIA 2nclt'2017 0512Jl17 MRAD--26 wate r r>r.1 11 I.Jran l~ 86.7 8!1.S 68.2 -110 AeceDtJllle EFIA 2nctQ0 1 7 0512Jl17 MRAD-26 Wate r DCIJL lk.ln l mn-2J8 !14.1 89;5 662-110 Aooeptable EFIA 2111112'0 1 7 0512Jl17 MRA0-26 Wate r oCIJL LR!l f-2JB 9B 89;5 6B.2-no AeceotalllE! ERA 200!2017 0512Jl 1 7 MRAD-26 Wate r DCIIL Uranlllm-T otal 1 8 1 1 114 135-2J.'3 AID>otalJle ERA 2r!d!'l0 1 7 0512Jl17 MRA0-'26 Wate r D!".1 11 Uranlllm-T o&al 1 7J 1134 tJS-238 Accent>illle ERA 2oo/20 1 7 05123117 MRA0-26 W<lte r DCIIL Uranlllm-T otal 1 80 1 114 135-238 ACceolallle ERA 2oot20 1 7 DS/2Jl17 MRA0-26 W.ite r DCI IL U r.nlllm-Total 1 85 184 135-23!1 ~e UliW'IIUffl-T otal ERA 2rxla0 1 7 0512Jl 1 7 MRAD-26 wate r !lllfl {mai,r;l 270 263 2 1 4 -324 Aeceolable Uranlllm-T ol.al ERA 2rxla0 1 7 05123117 MRA0-26 wate r lfQll. {mai,r;) 260 263 2 1 4 -J24 ~e UliW'llllm-T ol.al ERA 2r!d!'l0 1 7 0512Jl17 MRAD-26 Wate r unfl.. "'1as6 l 252 2611 2 1 4-3.24 ~E! Uranlllm-T olal ERA 2r!d!'l017 0512Jl17 MRA0-26 Wate r u nit l m.-1 276 263 2 1 4-3.24 A<n>nbble ERA 2rxla017 05123117 MRAD-26 Wate r DCI/L 2J~ 2160 1 960 1 630-2470 Acceotable ERA 2rxla0 1 7 05123117 MRAD-26 Wate r !lOIL Gnt65Allltla 1 25 89.S 3 1.4-139 """""'able Page 11 of 1 2 Page I 56 APPENDIX C 2017 AREOR til =i I Laboratories 11 a 111,, r Ct 1h11 m.L Ci~up oer com ...... t ce1111aMe PT Gllatlr l ....... ...... ...... GEL ......, ...... y-.,. ..... -Ulllt ~,--RIIID E...._ ERA 2ndl2017 05123117 MRA0-26 Wa!E!r r>r.1 11 Gro&lil!etl 59..6 61 34..9-9DA AttPnt>Ne 1 JOOO -ERA 2rx!tl0 1 7 D512Jf 1 7 MRAD-26 Wate r oCIJl Tlltl .... 1 890D 1 9400 21700 lla:e<!bbie ERA 2ndt2.0 1 7 DSIJOf17 RA0-1 D9 Wate r DO il Gm65Allllla 79.7 75 3'J!.5 -!123 Acc:e!Jtat-.. ERA 2nd/20 1 7 OSIJOf17 RAD-1 119 Wate r pCI/L GIOl6 Alpha 72..9 75 39.:S*-92 .. 3 Accellfallle ERA 2nd/2017 OSIJOf17 RAD-1 D9 Wate r Da ll Gro55 Alpha 72..9 75 39.:S-92.'3 Ac:cellfallle Pa g e 1 2 of12 Page I 57 APPENDIX C 1c1::jl Laboratories uc nb r ' 118 OH G f] p TABLE 2 GE L QUARTERLY INTERLABORATORY COMPARISON July through September 2017 Page 6 of 9 G EL 2017 AREOR oet com " Page I 58 A PP ENDIX C 2017 ARE O R ti1511 laboratories Lt C a ,r.,.nb,r ol l he 6tl Gr:11 1 p oeicom lllparf Ace_.

• PT Gllll1ill" I .........

...... ...... .....,._, G B. ic-......, PnNldlr Ylilr DIii ....... ..... llnlt ...... v .. ..... RIMo EZA 2nd/2017 llll/02t17 E 11 UJ C.Jftllda;e IIC I I Odll'll!-13 1 8.65E+o1 8A6 E-+01 1.D2 At!a>otlble EZA 2l"Kll2Df7 llll.'ll2!1 7 E 11 874 Mil OCl/1 Slmnt.lum-a!l 8.88Et0 1 9.26 E t01 0.!16 Al:cel>lable EZA 2ndJ20f7 IIIW2/1 7 E11874 MU .,,,.,, stmnllum-'JO 9.!56E*+OO 1.3'5 E+Of 0.71 -le EZA 21'K1121lf7 06!02/1 7 E11875 Mll nr.111 CEl1ll'l1.-14 1 1.62Et02 1$1E+02 1.D7 -le EZA 2ncll2D t 7 06Jll2/1 7 E U.875 MU DCl'L CObalt-58 1.53E-+02 1.55 E+02 0.98 At!<,pmable EZA 2nd/2017 tJB.1 D2f 1 7' E 11 875 Mll nclll CObalt-60 2.DTE+D2 1.9t E+D2 U>II Al:cel>lable EZA 2nd/2D.f7 OIW2/1 7 E 11 875 Mil OClll Clvorn l ll'll-5 1 J.65E+02 J.1 5 E t02 1.16 Accep!aDle EZA 2nd/20 1 7 08/ll21 1 7 E 11 875 MU nN/1 Ce6bn-1 34 1.711Et02 1.88 E+D2 0.!112 -le EZA 2ndl20 t 7 06Jll2/17 E 11 875 MU pCl'l Ce61Um-1 J7 1.5TE+D2 1.511J E+02 1.()5 Atts>otlble EZA 2nd/20 f 7 tJB.ID21 1 7 E 11 875 Ma DCIIL lrOll-59 1.28E~2 1.1S E+02 1.11 Acceotlble EZA 2nd121lf7 llll/02t\1 E 11 875 Mil pClll I Odll'll!-1 3 1 9 . .9Jct0 1 9.36 E t01 1.06 Aa:ep1allle EZA 2nd/20 f 7 06/ll2f17 E 11 875 MU nnll M~S4 1.SSE-+02 1.12 E*+D2 1.1 4 Al'N'Diable EZA 2ncl/2D f 7 06.'1l2/1 7 E 11 875 Mll nr.111 ZI00-65 2.1 8E-t02 2.B4 E+02 1.D7 A.........hhle EZA 2n11.i 211 1 1 tJB.I021 1 7 E1 1 876 Water DCl'L Cl:llirn-1 4 1 2.09 E t02 1.99 E+02 1.05 Aoo!'ot.lble EZA 2ndl2D 1 7 OB.'D2t 1 7 E 11 876 water OCl/1 Cooalt-58 2.11Et02 2.04 E+02 1.04 l\cl:eptlble EZA 2nd/2Df7 IIIW2/17 E 118 76 W'ikr .,,,.,, CObalt-60 2.S7Et02 2.S0 E+02 1.IIJ ~able EZA 2nd/20f7 OB.'D21 1 7 E 11 876 Waler OClll CIVorn l ll'l1-5 1 4.4 1 E-+02 U JE*+02 1.D7 A.-ntll:,ie EZA 2nd121117 OBJll2/1 7 E 11 876 Waler OClll Ce6bn-134 2.J8E-t02 2.47 E+02 0.96 Acceoiable EZA 2nd/20f7 06/ll2f 1 7 E 11 876 Wilter OClll Ce61um-137 2.20E+02 1.97E+D2 1.1 2 Aooeotlble EZA 2nd/21lf7 OIW2/1 7 E 11 876 Water Da!\. lroll-69 t.64E+m 1.5 1.E*+02 1.1 19 -le EZA 2ndl2Df7 08JD:2/1 7 E 11 3 , 76 water OClll I Odll'll!-13 1 B.69Et0 1 8.1 2 E+0 1 1.D7 """""tlble EZA 2nd/20f7 06J02/17 E 11 876 Waler DCl.'t Man-2.43Et02 2.25 E+D2 1.D8 Acceotlble EZA 2ndl2Df7 OBI02/1 7 E 11 876 Willer DCl'L Zln!>65 2.95E+D2 2.67E+D2 1.1 0 """""tlble ERA Jnl/ 20 17 Ol!J28/1 7 RAO-t iO Water OClll Bar1Um-t 33 68.8 66.J 55-2

• 7'2.9 Aoceotlble ERA Jnl 1 20 1 7 tJB.128/ 1 7 R,tO. , 10 water nNll Ce61Um-134 211.7 24.4 1 8.7-27.2 -table ERA Jrtl/ 20 1 7 06.!28/1 7 R,11). '1 0 Waler nr.111 ceam-tJ7 51.7 5 1.6 46.4-59.6 .. ~le ERA 3nl 1 20 1 7 OB.!26/1 7 R,11). , 10 water nr.111 cooalt-60 97 lla.6 79.7 -99.8 A.c<,eoiable ERA Jnl/20 17 0111281 1 7 RA0-1 10 Wilb!r OClll Zl:lc-65 39.7 32.7 27.:)-4 1.6 Aooeo1able ERA Jnl/ 2017 tJB.128/1 7 IW>-1 10 Wate r nr.111 Grtl66 Al""" ~.J 25.7 1 3.0-34.t """""tlble ERA Jnl/ 2017 06.!28/1 7 RA0-11 0 Waler ....... Grtl66AI""-" 3 1.9 25.7 1 3.0-34.1 """""tlble ERA Jnl 1 2017 OB.!'2!1/1 7 R,tl). ,1 0 Waier DCl/1. G"'" Be ta 511 .. 4 63 113.5-69;6 Acceotable ERA Jnl l 20 1 7 tJB.126/1 7 fWl-1 10 water DCI.'\. Radlll'l1-226 1.6 1.29 t.07
• 1.95 """"°'""le ERA 3nl 1 20 1 7 Ol!J28/1 7 RAO-11 0 pCl'l Rildlll'l1-226 1.2 1 1.29 1.0 7
• U IS Accl>oiable E RA Jnl / .20 1 7 06J'2af17 R,t0.1 10 w~ ...,...l RilCl1lrl1*228 6.4.9 5.66 , l.45-7.A7 ,.,,,,.,,;:,;,le ERA J nl / 20 1 7 08/28/17 R,tll-11 0 Water DCl/1. R.dmn-228 5.59 5.66 J.45-7.47 .ADceptable ERA Jnl l 20 1 7 06/28/1 7 RA0-1 10 water DCl/1._ uran i um lNatl 65 66.7 54.J-73.9 """""'tlble ERA J nl 1 20 1 7 OBml/1 7 R,,0-1 10 water DCI.'\. uran i um (Nat) 616.2 66.7 54.3-73.9 Acceotlble P age 7 o f 9 Ge Lu.'bo r 11ti om:u 1~ "O!l>llnf a, 1.~n,;1;1!11*111 31")~-Pl\ICl'l'IIJ'

, M ** stl ,!'71 r .. , ...... , ,.1'1 "'--'"" Page I 59 APPENDIX C 2017 AREOR mil La b orato r ies t 1 am r,b IO'I IISGHGr) (I -*--,--o e 1 c om -..... Ac~--* PT QMIWI -..... .... ...,., GEL "-....., PnMcllr .,.. om ..... -VIiia .. Ell I t-cm U"ariUTI (.Nit) ERA 3nH 20 1 7 08/2af 1 7 RA0-11 0 Waller oo/1. llla65 97 98.1 79.8 -1 0 9 -le-'lk.iri (tfat) ERA 3rd/ 20 1 7 OW28117 RA0-!1 0 Water IJQ/L llla65 104.7 98.1 79.8-1 0 9 AollPD!atJle-ERA 3 nf/ 20 1 7 08.'281 1 7 ll.lO-*10 W:Rr l'lCl'L Tnft:Jm 5 1 20 :506 0 4340-5570 .. ~le-ERA J nf l 20 1 7 06f2a/17 RAD-*10 Wat.."!" nrll1 T""'*m 4620 5060 4340-55 70 A-le-ERA 3111 1 2017 081281 1 7 RA0-*10 Water l'lCl'I stror6m-.89 Z9.9 26.4 1 8A-32.9 .. """"""le-ERA 3111/ 2017 06l23/1 7 RA0-11 0 water DCIIL SlrnnilllRH!9 26.2 26.4 t a4-J2.9 ,.,,,_;able-ERA 3111 1 2017 OBnll/1 7 R,fl>-1 10 Water DCl!I Stronllum-'9D 31'.8 3 6 26.4 -4 1.5 Aeclel>1at>le-ERA 3 111 , 1 2017 08.IZ3/1 7 RAD-*10 waw-nl'II I sfronl!Um-90 34 36 26.4-4 1.5 ,.............,le-ERA 3 nf I 2017 08.IZ3t1"1 ll.lO-i 10 ~V:Rr pCl'L l o llne--1 3 1 28 25 . .5 2.1.2-JD.1 """""'1:anle-Nol ERA Jnl/ 2017 08n!ll 1 7 RA0-1 10 'Nater l'lCl'I I Ollne--1 3 1 33 25.5 2 1.2-JD.1 Aeclel>1at>ie-P age 8 of9 Gl!l Page 160 APPENDIX C M=II LaboratoriesL Lc ~IHI I I The GCL Gro11p C TABLE2 GEL QUARTERLY INTERlABORA TORY COMPAR I SON Octoberthrou December 2017 Page6of 12 2017 AREOR gel com Page 161 APPENDIX C 2017 AREOR ta::11 Labo r a t orieSL LC 1 rnl, rat T e GCL G r 11p ,~ gel com -----Ripest AicceptiaMae PT QmltN" Rl!ceMd s-.-GEL Ralg!I Prvwimr I Yur (ale _.......,. _. Ural _, Nudidl! YaR Yilllle Ralio Evaallon MAP EP 4lh/2017 1 2101/17 MAPEP-1 7-MaW37 WilAK Bq/l Cesiu m-1 34 10.50 1 1.5 8..1-1 5.0 ~table MAPEP -'khl2017 1 2/0 1/17 MAPEP-1 7-MaW37 Waler Bq/1.. Cesiu m-1 37 1 6.800 1 6.3 t1.2"2l.2 Acceotable MAPEP 4lh.l2017 1 21011t7 MAPEP-17-MaW37 w.-.1.-Rn/1 Ooba l t-57 1 2. l 1 2.1 ~15.7 ~ble MAPEP 4th.'20 1 7 1 210 1fl 7 MAPEP-1 7-MaW37 Wat.<< Boll Cd:>aJl..&J I D.BOO 1 0.7 7.5-13.9 Acoeotable MAPEP 4llv20 1 7 1 2/0 11 17 MAPEP-1 7-MaW37 Waler Bail H 250 258 1 8 1--335 Acceotable MAPEP 4lw.20 1 7 1 2/0 11 17 MAPEP-1 7-MaW37 WOO!'/ Ra.'L l rcn-65 2D.1 19.4 13.6-25..2 AcoPril.c1ble t.lAPEP 44W2.017 1 2J0 111 7 MAPEP-1 7-MaW37 WatB Ball EA 1 5.5 1 4.9 10.4-1 9.4 Acoeolahle -Fa l sePos MAPEP 41h/2017 1 210 1/1 7 MAPEP-1 7-MaW37 Wal£!r-Ba/L Nickele-63 0.764 D Test Acoeotable MAPEP 4h/2.0 1 7 1 2/0 1/17 MAPEP-1 7-MaW37 w-Ba,'\.. Plullorium-238 0.528 0.60 0.422-0.784 Acceptable MAPEP 41h/20 1 7 1 2/0 1/1 7 MAPEP-1 7-MaW37 W:,a,r Ba.'L Plrtonium-23111240 D.654 D.78 1 0.547-1.015 Acceotable FalsePos MAPEP 4lhf.2017 1 2J0 1/l 7 MAPEP-17-MaW37 W:t.!-~ Rall Potassitsn-40 -12 D Te51 Accerita.lw> MAPEP 4lh/'2017 1 2.'0 111 7 MAPEP-1 7-MaW37 w~ Bail Racium-226 o.n4 0.86 0.60 1-1. 1t5 Acceotable MAPEP 4lhr./.0 1 7 1 2/0 1117 MAPEP-1 7-MaW37 Waler Rall Slrontiwn-90 7.04 8 5.44-10.1 0 ~ble MAPEP 4lh/'20 1 7 1 210 1/17 MAPEP-17-MaW37 WOO!'/ Bq/L T echnetium-00 6.4 1 6.73 4.7 1-R75 Acceo1'3ble MAPEP 4lh/21l17 1 210tf17 MAPEP-1 7-MaW37 Wi141!T Ball.. Uran i um-234/233 1.09 L ot 0.71-1.31' ~e MAPEP 4ltv20 1 7 1 210l/t7 MAPEP-1 7-MaW37 w .... ..-Anll Ura n ium-238 t.140 1.040 D..73-1.35 ~-.ble MAPEP 4lhf.20 1 7 1 2Jll 1/17 MAPEP-1 7-MaW37 w~ Bq/L Zino-65 1 7.3 1 5.5 10.9 Aoaeotable MAPEP 4llv'20 1 7 1 2J0 1f1 7 MAPEP-17-XaW37 Alk. Wats5 Ball.. l odine-1 29 2.590 2.3 1 0 1.62-3..00 ~-able 0.0355-MAPEP 4h'20 17 1 210 1'17 MAPEP-1 7-RdF37 Filter *-'---1-Ura n ium-235 0.0521 0.0507 0.065(1 MAPEP 4llv'20 1 7 1 2/0 1(17 MAPEP-1 7-RdF37 Filter ,.-,1<.,vnnle Uranium-238 7.8 7.0 4.90-9.1 0 Acceotable MAPEP 41h/20 1 7 1 2/01/17 MAPEP-17-RdF37 Filter Uranium-T ota l 7.04 7.05 4.94-9.17 Acceotable D.0458-MAPEP 4th/20 1 7 1 2/0 111 7 MAPEP-17-RdF37 Fill...-Bafsa~e Americium-24 1 0.053300 0 0.0796 ~ble MAPEP 44h/20 17 1 2101f\7 MAPEP-1 7-RdF37 Fi l ter Bo'sarmle Cesiu m-1 34 1.0300 1.00 0.7-1.30 Al>oPotable MAPEP 441\12.0 1 7 1 2J01f17 MAPEP-1 7-RdF37 fi l!Er B<l'samcile Cesiu m-1 37 0.88 0.82 0.57-1.07 ~otable F: l se Pas MAPEP 4til'.2.0 1 7 1 2/0 1(17 MAPEP-1 7-RdF37 Fi l ter Balsamole Cobalt-57 0.01 0.00 T est ~ble MAPEP 4ih/'2017 1 210 1'1 7 MAPEP-1 7-RdF37 Fi l ter Bdsample Cd>alt-00 0.75 0.68 O a 43-0.88 MAPEP 4ttv20 1 7 1 2/0 1(17 MAPEP-1 7-RdF37 Filler B<l'samcile M-CA 1.48 1.30 0.9 1-1.69 A,,r,,,.nL-ahle -0.0209-MAPEP 4lh/20 1 7 1 2/0l/17 MAPEP-1 7-Rdf'37 Filler Bq/sarr,ple Plutonitm-238 D.0257 0Jl298 0.0387 0.0328-MAPEP 4hr.2017 1 2/0 1(17 MAPEP-17-RdF37 Filla' BQ/sample PkltDnium-2391240 0.0408 0.0468 0.0608 MAPEP 4lhr.1.017 1 2/0 1/1 7 MAPEP-1 7-RdF37 Fi l ter Anki>mnle Strontiwn-90 0.608 D.80 1 0.56 1-1.04 1 ~ble MAPEP -4ih'20 1 7 1 2/0 111 7 MAPEP-1 7-RdF37 Fi l let" Bdsamale Uran i um-2341233 0.086 D.084 0.059-0.1 09 Acceolable MAPEP 4lnl20 1 7 1 2/0 1'1 7 MAPEP-1 7-RdF37 Fi l t er Bo'sarmle Uranium-23S D.D93 0.087 0.06 1-0.1 13 ~ble MAPEP 4fu/'2017 1 2/0 1/17 MAPEP-1 7-RdF37 Fil!B-Anki>mnle Zino-65 1.2500 1.08 0.~1.40 """""1l;,ble MAP EP 4thl2017 1 2101(17 MAPEP-1 7-RdV37 Veiietmion Balsamole Americium-24 '1 D.D80 D.Dn D.054-{). I Acceolable MAP EP 4thl2D 1 7 1 2/0t/17 MAPEP-1 7-RdV37 Veiiet:mon Ba/sample C-esium-'1 34 2.30 2.32 1.62-3.02 Acceptable Fa l se Pas MAPEP 4ft/2017 1 2/01/17 MAPEP-'1 7-Rd\137 Vegetation BqJsample Cesium-1 37 0.0 1 9 1 0.00 Test ~otable MAPEP 4lh/2017 1 2/0 1/17 MAPEP-17-Rd\137 Vegetation B""'-"mnle Cobalt-57 2.92 2.80 2.0-3.6 A,,r,,,.nL-able Page 8 of 12 G El. Laboratxirit:s I.L C Page 1 62 APPENDIX C 2017 AREOR fiJ a I Laboratories u C 0 w il ier o f The GCL G r oup ic POE/,1 ! , 12 ,l4Ul:ii!Va~~ C oef com -,~ Report Acceptaloe PT Qr.a.irtiH "-iwd S-.ple GEL Rangel Prowidl!r I Yur ewe -......... .. Unit _, Nuclide Villue --Rilllio Ewluaon MAP EP 4lh/20 1 7 1 2/0 1(17 MAP EP-1 7-RdV37 Vegela!ion Bctsamcle Qibalt-60 2-24 2..07 1.45-2.69 Accep1able MAP EP 4fu/'20 1 7 1 2/01117 MAPEP-1 7-Rd\137 Veaeialion Bo'samcle Manaanese-54 2.78 2.62 1.83-3.4 1 Acceotable MAP EP 4fu/'20 1 7 1 2/01'17 MAP EP-'1 7 -Rd\/37 Ve,o~cn Bcrsamrile PlulDniu nr 238 0.0762 0.0830 0.058-0. 1 08 ~ble MAP EP 4llv'2017 1 2/01'17 MAP EP-17-Rdl/37 Ve,oetalion Bal samrne Pluton i tm-239'240 0.104 0.108 0.076-0.140 ~bl e MAP EP 4thf2!l 1 7 1 2/01 1 17 MAP EP-1 7-Rt:flf37 Veae4ation 8Qlsample Strontiun-00 0.960 1.23 0.86-1.6 Acceptable M AP EP 41h1'2D 1 7 1 2/0 11 17 MAP EP-1 7-Rdl/37 Vea.elation Rnl.s,-n ol e Uran iu nr234/233

0. 162 ll.159 0.1 11-0.207 Accent.-.hle M AP EP 4ttw2017 1 2/D11t7 MAP EP-17-Rd\137 Vesi.ebtion Bokam ol e Uran i tm-238 0. 166 0.163 0.1 14-0..212 Aooelltabl e MAP EP *4th/20 1 7 1 2/0tf17 MAP EP-1 7-Rd\137 Vegetation Balsarmle Zine>-65 5.Q3 5.37 3.~.88 Acceota bl e ERA 4lhl'20 1 7 1 tll7/17 M RA0-27 Soil nC'.i olin Actina.r nr 228 1 200 1 2.40 785-1 720 ~e ERA 4tW20 1 7 1 t/17117 M RA0-27 Soi l oOiilto Americi u nr2 4 1 1 1 80 1 1 40 667-'1 480 ~e ERA 4lh/20'17 1 tft7117 MRAD-27 So il oCiillo B i srruth-2 1 2 1 600 1 2.40 330 -1 820 Acceotable ERA 4IW20 1 7 1 1/17/17 MRA0-27 Soi l nC'i olin B i srruth-2 1 4 1 460 1 890 1 i40-2721J IW:lcenlahle ERA 4lhl20 1 7 1 1117/17 M RAD-27 Soi l nl'.i olin Cesiu nr 1 34 5770 6320 4 1 30-7590 """"""'>>ble ERA 4tw.1.0 1 7 1 11 1 7/17 MRAD-27 Sor l oa&o Cesiu nr 1 37 3Q40 3830 2930-4 930 Acceolllble ERA 4lhl2017 1 t/171\7 MRAD-27 So il rC.ilkn Col>a lt-00 4 1 10 4 1 30 2.7QO -5690 Aooenl.i>hle ERA 4lht2.0 1 7 1 1117117 MRA0-27 Soi l cCil1ta Lead~1 2 1 270 1 240 8 1 2 -1 730 Aooeo1able ERA 4lh/'2017 1 1 117117 MRAD-27 Soi l oC.ilka Lead-2 1 4 1 7:m 1 880 1 160-2850 Acceptable ERA 4lh/20 1 7 1 1/17 11 7 M RAD-27 Soi l r,{'j ll,n Lt.~anese-54

<29.2 <1 000 <1000 Accenb bl e ERA 4lh/'20 1 7 1 1117/17 M RAD-27 Soi l cCi/ka P l utoniu nr 238 508 6 1 5 370-849 ~-ble ERA 4ful20 1 7 1 tll7/17 MRAD-27 Soi l pCi/kg P l u!Dniu nr 238 578 506 33 1 -600 Acceolable 7740-ERA *4Wl0 1 7 1 t/17 11 7 M RAD-27 Soil cCi/ka Potassium-40 1 0000 1 0600 t421JO Accenh bl e ERA 4llv20 1 7 1 1117117 M RA0-27 Soi l nCi/lcn Strontitm-80 2530 3460 1'120-5470 Acceobble ERA 4th/20 1 7 1 11 1 7 1 17 M RA0-27 Soi l oCilka Thariu nr 234 4 1 60 3690 1 1 70-6840 Acoent.,ble ERA 4lh.l20 1 7 1 11 1 7117 MRAD-27 Soil oC i/1<<> Uranir..m-234 4310 37:m 2270-4770 ...,,.,.._hie ERA 4W20 1 7 1 1117117 M RAD-27 Soi l oCilka Uran i tm-234 3350 3720 2270-4770 AcceDlable ERA 4lh/'20 1 7 1 t/1 7117 MRAD-27 Soil .Cilka Ura n i tm-234 3400 3720 2270-4 770 IW:lce r>L-.ble ERA '4d1(21)17 1 1117/17 MRAD-27 Soil pCilka Uran i r..m-238 3590 3600 2200-4680 Acceolable ERA 4!h/2017 1 1117117 M RAD-27 Soil DCilka Uran i tm-238 4380 3690 2280-4680 Acceotable ERA 4lnl2017 1 1117117 M RAD-27 Soil cCil1to Uran i tm-238 3260 3600 2280-4680 ....,,.,.._ble 4 1 10-ERA 4fu/'20 1 7 1 1117117 M RA0-27 Soi l DCilka Urarwm-T otal 77'32 7580 10000 Accecta bl.e 4110-ERA 4th/'20 1 7 1 1/17117 MRA0-27 Sor l pOilkg Urana.r nr Tota l 7 1 00 7580 10000 Acceolable 4 1 10-ERA 4th/20 1 7 1 t/17117 M RA0-27 Soi l pCifka Uraniu nr T ota l 7780 7580 10000 AcoenL-,.hle 4 11 0-ERA 4th/2017 1 1/17117 MRA0-27 Soi l oCilka Uraniunr T ota l 8090 7580 10000 Ar,r.o,,ntn hl e Uranium-T ota l 6 1 20-ERA 4ful2017 1 1 117117 MRAD-27 Soil ua/ka {massl 1 2 1 00 1 1100 1 4000 ~ble U r ari u nr T ota l 6 1 20-ERA 41.hl'20 1 7 1 1/17117 M RA0-27 Soi l ua/ka Crnass l 1 D800 11 1 00 14000 AcoenL-,.ble U r arium-T ota l 6 1 20-ERA 4<h/2.0 1 7 1 1117117 M RA0-27 Sot l ua/ka (mas s) 1 2200 11 1 00 14000 Accecta bl e U r.num: T ota l 6 1 20-ERA 4!hl20 1 7 1 trt7117 M RAD-27 So il ua/ka (m ass) 9770 11 1 00 14000 AcoeDla bl e Page9of 12 Page I 63 APPENDIX C 2017 AREOR ra a. Laboratories L L

• e11 11~, a t T e GCL Group le ael com -,_ -Aepart A&:cept.aoCr PT Qu;wter-Receiwd s-.-GEL Kr-. Rmgel Prowider /Ye., Ila _......,_

Meda Int _, Nuclicil! Y.-.e Wllue ftalio Ewllulian ERA 4th/2017 1 t/17/17 MRA0-27 Soil DCilk<J Zinc-05 7380 6660 5300-8850 ~e ERA 4!W2.017 1 1/17117 MRA0-27 Ve<!ellibcln pCi/kg Ameriaum.-241 68 1 670 410-891 Acoeotable ERA 4ihr.2017 1 1117/17 MRA0-27 Ve:gelation DCi/ka Cesium-134 1 530 1 670 1 D70-2170 AcceDtable ERA 4m'2017 1 1117/1 7 MRA0-27 Veoebtion DCi/kg Cesi um-1 37 1 800 1 840 1 330-2560 AcceDtable ERA -4lh/20 1 7 1 1117117 MRAD-27 Veoelation nCillin Cobalt-00 2320 2180 1!500-3050 Acceolable ERA 4IW2017 1 1'17/17 MRA0-27 Veflelalion oCilka Cln!m.-244 2380 2790 1370-4350 ~e ERA 4llv2017 11117/1 7 MRA0-27 Ve:gebiion oCi/ka t,tanganese-64 <36.1 <!00 <300 Acoeotable ERA 4th/2017 1 t/t71 1 7 MRAD-27 Veo e taticn nC~ PlulD<wm-238 3340 4 180 2 400-5720 A,y,p,,t.~ble ERA 4th/2017 1 1117 11 7 MRA0-27 Veoebtion nCi/1m PlutonaJm,.239 950 1 060 651 -1460 22300-ERA 4thl2017 1111 711 7 MRA0-27 Ve:getation oCi/ka Potassii..m-40 34000 30000 43400 Acoeotable ERA 4!W20 17 1 11171 1 7 MRA0-27 Veo.eution DCilka Slronti!SD-90 2580 2650 15 1 0-3510 Accent.~ble ERA 4IW20 1 7 1 1/17/17 MRA0-27 \h>oebtion nCi/ka Urani!SD-234 985 005 654-1280 ~e ERA 4th/20 17 1 1117/17 MRA0-27 Ve:getation nCillia Urani!SD-234 1 1 00 005 654-1280 AcceDtable ERA 4th/20 1 7 1 1/17117 MRA0-27 Vegelation , pCilkg Urani!SD-238 1 040 Ql87 650-1250 Acceptable ERA 4lhl20 1 7 1 1/17/17 MRA0-27 Vefletalian oCilka Urani!SD-238 821 087 650-1250 Accenmhje ERA 4int20 1 7 1ll17/17 MRA0-27 Veaetation !]Cilka Urarwum-T Ola! 2320 2030 1 380-2530 Acceotable ERA 4lhr.lll 1 7 1 1117117 MRAD-27 Vegelation DCi/ka U rarwum-Total 1 845 2030 1 380-2530 Acceotable ERA 4lh/2017 1 1/1 7/17 MRA0-27 Vea.elation DCilka Urarwu m-Tol.llJ 2300 2030 1380-2530 AN>i>nt.~hle Uranium-Total ERA 4lh'2017 11/17117 MRA0-27 Veoetalion uru'lm (mass) 3200 2980 2000-3780 Aco>rit:,,ble Ur anium-Total ERA 4lhl20 1 7 11/1 7117 MRA0-27 Ve:iieblion uru'lm (mass) 2460 2980 2000-3780 Acceotable Uranium-T otaJ ERA 4th/2017 11/1 7117 MRAD-27 Vegeb1ion ualka (mas s) 3460 2980 2000-3780 Acceolable ERA 4th/2017 I \117/17 MRA0-27 Vegetalion cCil1la Zinc-05 1 670 1 400 1 0 1 0-1 g70 Acceotable ERA 4IW20 1 7 I 1/t7117 MRA0-27 Filler DCi/Fi l ter Americium-241 1 5.4 14.0 9.18-20-2 A---**-Le ERA 4!W20 1 7 1 1/17117 MRA0-27 Filter DCi/Fi l ter Cesi u m-134 1 4 1 0 1 440 9 1 6-1 700 l\cceombje ERA 4th/20 1 7 1 1/17/1 7 MRAD-27 Filter nr.i/Fi l ter Cesium-137 1 0l0 954 7 1 7-1 250 A e ERA 4W2.0 1 7 1 1117/17 MRA0-27 Filter DCi/Fi l ter Cd>all-60 296 27 1 2 10-339 Aooeotable ERA 4lhl20 1 7 1 1/17/17 MRAD-27 Filter DCi/Hter 1 010 1 080 335 -2110 Acceotable ERA 4th/2017 1 11 1 7/17 MRA0-27 Fill<< cQ'Filter Uvv,anese-64 <3.1 8 <50.0 <50.0 Acceotable ERA -4lh/20 1 7 1 1/17/17 MRA0-27 Filb!r DCi/F d ter Plutonium-238 61.8 63.9 43.8-84.0 Accentable ERA 4lhl20 1 7 1 1117/17 MRA0-27 Filler pCi/R l ter Plutonium-239 40.2 44.4 32.1 -58.0 ,. __ ,....,e ERA 4!W2017 1 1/17/1 7 MRA0-27 Filter nl'j/1::jfter Slrcntium-00 1 1 5 121 59.1-18 1 A,,no.nt...,ble ERA 41h/'20 1 7 1 1/t7117 MRAD-27 Filb!t' DCi/Fi l ter Urnnium-234 42.8 41.5 25]-62.6 Accentable ERA 4llv20 1 7 1 1117/17 MRAD-27 Filb!t' DCi/F d ter Urnni!SD-234 38.5 41.5 25.7 -62.6 A--*-1..le ERA 4W2.0 1 7 1 1/17/17 MRAD-27 Filter DCi/Fi l t er Uranium-238 41.t 41.2 26.6-57.0 Acceolable ERA 4ih/20 1 7 1 1/17117 MRA0-27 Filter DO/Fi l ter Ul'anium-238 37_5 41.2 26.6-57.0 Acceotable ERA 4ih/'20 1 7 1 1/17/1 7 MRA0-27 Filter nCi/Fi l ter Uraniu m Tota l 82 84.6 46.8 -129 Accentahle ERA 4th/2017 1 t/17/17 MRAD-27 Fill<< i,CiJFilter Urarwum-Tobl 86.7 84.6 46.8 -129 Acc.>otable ERA 4th.l2017 1 1117/1 7 MRAD-27 Fil!N DCi/Fi l ter Urarwum-Total 83 84.6 4 6.8-129 A=eol.able ERA 4lh/20 1 7 11/1 7/17 MRAD-27 Filb!r uafFilter lhn_.TOlll ltln oH l 129 1 23 78.7-1 73 Acceotabl.e Page 10 of 12 Page 164 APPENDI X C =II Laboratories L w .1 , ~1111:i.:1 ,ii T e GCL Grou p ,,; --ll!palt PT Aeceiwd PnMder /YNtT Date _.......,. lll!cN Unit ERA 4lh/2017 1 t/17 1 17 MRAD-27 Fi ll.et' µQffi l ter ERA 4lhl'20 1 7 1 l/17fl7 MRAD-27 Fill.E!t' uatfi l ler ERA 4thl'20 1 7 1 l/t7 (17 MRAD-27 Fill.E!t' nc.l/Fi l ter ERA 44hf20'17 1 1/17 11 7 MRA0-27 Filb!r aCilFilter ERA 4lh/20'17 1 tf 17/1 7 M RAD-27 Fi ll.et' cCilFilter ERA 4lh/20 1 7 1 lf17f17 MRAD-27 Waler oCiJl ERA 44hf20 1 7 1 tft7/17 MRAD-27 W.b!c cCi/L ERA 4lh/'20 1 7 1 1/17117 MRAD-27 Wat,y pCi/L ERA 4lh/"2017 1 l/t 7/17 MRAD-27 Wat,y pCi/1.. ERA 4th/20 1 7 1 1ft7/17 MRAD-27 Wat<< DCi/L ERA 4thl20 1 7 1 flt7/1 7 MRA0-27 Water nC.i/1 ERA 4lh/'20 1 7 1 t/17/1 7 MRA0-27 WaAa nCi/L ERA 4lh/'20 1 7 1 lft711 7 MRAD-27 Water cO/L ERA 4ltv'20 1 7 1 1/1 7 1 17 MRA0-27 w~ cCi/L ERA 4lh/20 1 7 1 t/17/17 MRAD-27 Waler pCi/L ERA 4lh/'20 1 7 1 lff7117 MRA0-27 Wate-pCi/L ERA 4thl20 1 7 1 1/17 11 7 MRA0-27 Wati,t-pCi/L ERA 4lh/'20 17 1 1fl7f17 MRAD-27 WillE!t' cCi/L ERA 4lh/'20 17 1 lft7 1 17 MRAD-27 Water i,C i/L ERA 4!h/20 17 1 1'17/17 MRAD-27 Watet' nC.iJl ERA 4lh/20 17 1 1/1 7/17 MRA0-27 Water nCill. ERA 4lhf20 1 7 1 1/17 1 17 MRA0-27 Water nr;n ERA 4lh/20 1 7 1 t/17/17 MRA0-27 Water µglL ERA 4lh/20 1 7 1 1117117 MRAD-27 Wal.et' ualL ERA 4IW20 1 7 1 11\7/17 MRA0-27 Wat<< .UQIL ERA 41h/'2017 1 1117'17 MRA0-27 Water cOJ1. ERA 4W20 1 7 1 1/17117 MRA0-27 Water cCi/l ERA 4th/20 1 7 I t/17/17 MRA0-27 WatE!t' c0/1. ERA 4ih/2017 I 1'17117 MRAD-27 w~ nC.iJl EZA 4lh/20 1 7 02/02/1 8 E 1 2067 ea.tridae ca EZA 4th/20 1 7 02/02/1 8 E 1 206B Mil k oCiJL EZA 4ih/20 1 7 02/02/1 8 E 1 206S Mil k nCi/L EZA 4thf20 1 7 02/02/1 8 E 1 2009 Mil k oCi/1 EZA 4!h/2017 02/02/1 8 E 1 2000 Mil k nC.l/l EZA 4th/'20 1 7 02/02/1 8 E 1 2009 Mil k nCi/1 EZA 4lhf20 1 7 02/02/1 8 E 1 2069 Mil k cO/l EZA 4lW'l0 1 7 02/02/1 8 E 1 200Q Milk oCi/l Page 11 of 12 GEL Labora: ortes LL C 0 l'tlB1 1 d, n C-4U i:iil,.lQ. >!!OC -GEL __ , Nuclia Val!R U r num-Total: (mass) 1 24 U r num-Tota l (ma55) 11 3 Zinc-85 146 Gross~a 60 Gros s Beta 68_3 AIIBicium-24 1 1 76 Cesi u m-1 34 1 340 Cesi u m-1 37 300 C<lbalt-60 1 ggo lron-05 1 550 t.tanoanese-54 <tl.38 P l u lcriu m-238 1 36 Plu ti:riu m,, 239 1.1 4 Strontitm-90 2 1 8 Umni iin-234 1 63 Urani iin-234 1 53 Ura n i tm-234 1 57 Ura ni iin-238 161l Urani iin-238 1 36 U ra~Total 306 U ra rw m-Total 3 10 U ra niu m-T ota l 343 U r.num-Tota l (mass) 5 1 0 U r arw u m-Total (mass) 463 Ur ani u m-T ota l (mass) 407 Zinc-85 20QO GrossAJnha 109 Gross Beta 127 Triiu m 2 11 00 lod i ne-1 3 1 4.84E+0 1 Strontilan-89 Q.54E+OI Stn: nti tm-00 1.34E+01 Ceriu m-t 4 1 1.07E+02 Cdla l t-58 9.21l E+Ol Cd>a l t-60 1.Q5E+02 Chromium--5

• 1 2.6QE+02 Cesiu m-1 34 1 20E+02 2017 AREOR oel com Accept-Known --Ratio &aalion 123 78,7-1 73 Acoectable 123 78,7 -1 73 Acoectable 123 88-1 -1 70 Acoent,.ble 50_ 1 1 6.8-77.8 Aa,ectable 61.8 39.1-00.1 Acceotable 158 106-2 1 2 Acoeptable 14 00 1 030-1 610 Acoent"'11e 378 32 1 -453 Acoenbble 1 830 1 500-2 1 40 Acoelltable 1 640 978-2230 Acceptable

<1 00 <100 Acoeotable 158 1 1 7 -19 7 Aooo>mable f 34 104-1 6 9 Aoceolable 222 1 4 5-293 Acoectable 160 120-206 Acoeptable 160 120-206 Acoectabl:e 160 120-206 Acoec&able 1 58 120-1 114 Acoent>hle 1 58 120-1 94 ~e 325 239-420 Acoent>hle 325 239-420 Acoeotable 325 239-420 Acoente>hle 474 378-573 A,,n,..nt;,ble 474 378-573 A,::oeptable 474 378-573 Acoel>table 1750 1 460-2210 Acceptable t 1 3 40.1-1 75 Acoeotable 130 74.4-1 93 Aocelllable 15 1 00 -.22500 32 1 00 AcoeDtable 4.8 1 E+0 1 1.0 1 Aooeolable 9.23E+0 1 1_03 Acoectable 1.61lE+0 1 0-7 9 Aocenbble 9.83E+0 1 1.ClQ Acoeolable 8.QQE+0 1 t.03 Aocent.o>ble 1.73E+02 1.13 ~ble 2.42E+02 1.11 Aocectable 1.25E+02 0.96 Acoeotable Page I 65

---

APPENDIX C 2017 AREOR Mal Labo r atorieSLLC

• I l'll1l *r c.l h e G EL Gr o u p i; r 1 100 178 oer com ---Aapart Atcept.w ..... PT Quiirt.r Aeceiwcl s-.-GEl. Known Rlngl!I Provider /Year -~ Media Unit -,~ YMIII! Wllue Raio EZA 4lh/20 1 7 02JC121 1 8 E 1 2069 Mlk nO/L CesaJ m-1 37 1.63E+Cl2 l.4 1 E+Cl2 1. 15 Aooenbihle EZA 4thl20 1 7 02JC121 1 8 E 1 2009 Mil k nO/L lron-5Q 1.27E+Cl2 L1 3E+02 f.1 2 Aocen>"ble EZA 4thl20 1 7 02JC121 1 8 E 1'2009 Mil k r>C.i/L l od i ne-1 3 1 6.5QE+D 1 5.78E+D 1 1.1 4 ~~hi e EZA 4thl20 1 7 D2/lJ2/1 8 E1200Q U(k ..r.i/L Lbnnanese-5,4 1.7QE+02 1.6 1 E+Cl2 1.1 1 Aooe-bl.e EZA 4lh/20 1 7 D2/lJ2/1 8 E 1 2009 ur k ..r.i/L Zino-65 2.34E+02 2.1 1 E+Cl2 1.1t Aooeotable EZA 4lh/20 1 7 02/lJ2/1 8 E 1 2070 Wa4Pr nO/L Cerium-t 4 1 6 .. 60E+D 1 6 , 24E+D 1 1.06 Aooeotable EZA 4lh/20 1 7 02/lJ2/1 8 E 1 2D70 Wa4Pr nO/L Cobalt-58 5.95E+D 1 5.70E+D 1 l.04 Acoenbble EZA 4thl20 1 7 D2/C121 1 8 E 1 207'0 Wa4Pr ..r.i/L Cobalt-<<)

1.1 5E+02 1.1 0E+Cl2 1.05 Aooent,.ble EZA 4thl20 1 7 02/021 1 8 E 1 2070 Wale£ nr'J/L Cl-.omrum-5 1 1.68E+02 1.54E+Cl2 t.l)Q Aooeotable EZA 4lh/21l17 02'02/1 8 E 1 2070 Water nr'J/L CesaJ m-1 34 7.47E+Dt 7.92E+D 1 CHM Aooeolable EZA 4lh/20 1 7 02/021 1 8 E 1 2D7D Wal£!r DOIL Cesium-1 37 9.3 1 E+ol 8.97E+D 1 1.04 Aooeotaible EZA 4lh/20 1 7 02'02/1 8 E 1.2070 Water DCiJI. l ron-59 8.74E+o 1 7.1 QE+D 1 1.22 Aoceal.Bble EZA 4thl20 1 7 021Cl21 1 8 E 1 2070 Water nr;/L lod i ne-'1 3 1 5.36E+D 1 4.95E+D 1 1.08 Aooen>~bfe EZA 4th.12ll 1 7 02/C121 1 8 E 1 2070 w-DOIL . r, l.1 4E+Cl2 1 .. 02E+Cl2 1.12 A<,oi,atabfe EZA 4th.12ll 1 7 D2/lJ2/1 8 E 1 2D70 w-DOIL Zino-65 1.57E+Cl2 1.34E+Cl2 1.17 A<,oi,atabfe Page 12 of 12 Ga Labor&torles u.c Page 166 APPENDIX D. COMPARISON OF OPERATIONAL TO PREOPERATIONAL DATA 2017 AREOR Page I 67 APPENDIX D 2017 AREOR Comparison of Operational to Preoperational Data and Analysis of Trends Unit 1 achieved criticality on June 14, 1967 and was permanently retired from service on November 30 , 1992. Unit 2 attained initial criticality on July 26 , 1982 and Unit 3 on August 29 , 1983. A variety of environmental samples were analyzed and the analytical results (January 1 , 1979 to July 31, 1982) were compared with the 2017 operational data obtained for SONGS Units 2/3. The following media were evaluated and compared with the operational data of SONGS Units 1 , 2 and 3:

• External Radiation
• Air Particulates
• Radioiodine
• Ocean Water
• Shoreline Sediment (Sand)
• Ocean Bottom Sediments
• Marine Species
• Local Crops
• Soil
• Kelp
• Drinking Water The measurements obtained from the SONGS Unit 1 operational Radiological Environmental Monitoring Program (REMP) during the period from January 1979 to July 1982 are used as the preoperational baseline for SONGS Units 2/3. This is in accordance with San Onofre Units 2/3 , Environmental Report, Operating License Stage , Appendix 6A, Pre-operational Radiological Environmental Monitoring, May 31, 1978. Comparisons of preoperational data to 2017 operational data are possible for each of the following exposure pathways: ( 1) direct radiat i on, (2) air particulates (inhalation), and (3) ocean water (marine pathway for ingestion). Comparisons can also be made between preoperational and operational data for ocean bottom sediment data to ascertain if there has been any significant increase in radioactivity in ocean bottom sediments near the SONGS Units 2/3 outfalls. Currently the preoperational data are higher than the operational data. The decrease in radioactivity is due primarily to the cessation of nuclear weapons testing and to the decay of fallout radionuclides.

There is a close correlation between indicator and control data over several decades. There are no indications of adverse effects from SONGS on the environment. Page 168 APPENDIX D 2017 AREOR A. Direct Radiation The direct radiation measurements for the SONGS REMP were made by TLDs on a quarterly collection cycle at 38 indicator locations and 11 control locations in 2017. (See Appendix I for ISFSI TLD data). The TLDs were located at inner and outer ring locations as specified by the ODCM. During the preoperational period from January 1979 to July 31, 1982 , the indicator stations ranged from 16.1 to 46.6 mR. The preoperational indicator average was 25.3 mR. The preoperational control range was 19.3 to 30.1 and the control mean was 23.1 mR. During the 2017 operational year for Units 2/3, the routine indicator TLD locations ranged from 9. 7 to 21.6 mrem, averaging

16. 7 mrem while the control locations ranged from 13.1 to 20. 7 mrem with an average of 17.0 mrem. Outside the EAB, all TLD results (control and indicator , for quarterly and annual measurements) are below each locations historical background plus the minimum differential dose (see ANSI/HPS N13.3 7-2014). Refer to Appendix B for a detailed discussion of the REMP TLD data. Facto r s such as meteorology , local geology, the fallout from atmospheric nuclear weapons testing , and seasonal fluctuations account for the variability i n the data as observed during the preoperational period for each location. The decrease in radiation levels at all TLD sample locations is attributable to the curtailment of the atmospheric nuclear weapons testing , and the continued decay of the manmade background from fallout from past nuclear weapons tests. Figure 9 compares the environmental radiation levels of selected indicator and control locations. Simul t aneous variation in the radiation levels at both the control and indicator locations shows that the variations are due to factors external to SONGS. Outside the EAB there were no measurable levels of increased direct radiation associated with SONGS as measured by TLD. B. A i rborne Particulates From January 1979 through July 1982 ( considered to be the preoperational period for SONGS Units 2/3), there was a noticeably higher gross beta activity in air at all sample locations. This period extends from the fourth quarter of 1980 through the fourth quarter of 1981. These higher activity levels were attributable to the Chinese atmospheric nuclear weapons test conducted on October 15, 1980. Page 169 APPENDIX D 2017 AREOR OS o* .. . . . . O) 't 02 01 . . 0 * ... .. .. < .. .. .. : . . . : C: .. .. -----,,,._,,_ Al-phefle

"" ... ' -.,,_y ... Set,&. ttn ,~,,_ -"'*'",._ .. ~Tffl .._,.,,,. -San Clemente City Hall .... S.1 MIies NW * *

• Huntington Buch (CONTROL)

... 31.1 Ml

• NW -Suito Boach Part! ... 0.6 MIios ESE -Bluff_,. 0.1 Moles WNW Figure 12 -Monthly Average Airborne Particulate Gross Beta Preop e rational and Operational Data for Units 2 and 3 , ( 1976 -1988) For 2017, the maximum monthly average airborne particulate gross beta result was approximately 0.029 pCi/m 3. This result is in line with both recent history and SONGS preoperational data. C. Radioiodine Most of the preoperational data for 1-131 level was below the detection limit. All the 2017 operat i onal 1-131 data were below the detection limit. This is expected , as the shutdown and defueled SONGS is no longer producing 1-131 , and all previously produced 1-131 has decayed away. SONGS had no effect on the environment as measured by the radioiodine cartridge data in 201 7. D. Ocean Water Monthly ocean water samples were collected near each of the Station discharge outfalls , and from the Newport Beach control location. The ocean water samples are analyzed for naturally-occurring and station-related gamma-emitting radionuclides. Samples were composited quarterly and analyzed for tritium. Page 1 70 APPENDIX D 2017 AREOR During the preoperational period, naturally occurring potassium-40 was detected in each of the samp l es collected from both indicator and control locations.

Other gamma-emitting radionuclides were detected in only one ocean water sample. In May 1980, Co-58, Co-60, Cs-134, and Cs-137 were detected in an ocean water sample collected from the SONGS Unit 1 outfal l. Concentrations of the radionuclides in this sample were 11 , 6, 380 , and 430 pCi/1, respectively. Tritium was also detected in two of the ocean water samples collected in May 1980 from the SONGS Unit 2 outfall and from the Newport Beach control location. The data for all plant related radionuclides at all ocean water locations during the 2017 operational period were not detectable and below the MDC. We conclude that the operation of SONGS had a negligible impact on the environment as measured by this sample medium. E. Drinking Water Due to its location on the beach, there is no drinking water pathway for SONGS. Nonetheless, drinking water samples from Oceanside and Camp Pendleton were collected and analyzed. No plant r elated radionuclides were detected during the 2017 operational period. Gross beta activity (from natural radionuclides) was detected during both the operational and preoperational periods at both the indicator and the control locations. No plant related radionuclides (including tritium) have been identified in 2017 , and no trends have been noted. The operation of SONGS had no impact on the environment as measured by this exposure pathway. F. Shoreline Sediments (Sand) Beach sand is collected semiannually from three indicator locations and from a control location situated at Newport Beach. The samples are analyzed for naturally occurring and plant-related radionuclides. To assess the impact of SONGS operations on this environmental medium, preoperational data were c ompared to 2017 operational data. The radionuclide detected in shoreline sediment in the preoperational time frame was Cs-137 with a range of 0.012 to 0.022 pCi/g, averaging 0.019 in 5 sediment samples. One control sample with a Cs-137 activity of 0.032 pCi/g was observed in July 1979. The presence of Cs-137 in both control and indicator locations during the preoperational period leads to the conclusion that the root cause is external to SONGS and is most l ikely attributable to atmospheric nuclear weapons testing. No SONGS-related radionuclides were detected in shoreline sediment during the 2017 operational period. The operation of SONGS had no impact on the environment as measured by this exposure pathway. Table 3 1 -Shoreline Sediment Concentration Cs-1 3 7 PreOp 0.012 -0.022 0.019 < LLD -0.032 < LLD Ooerational < LLD < LLD < LLD < LLD All other SONGS PreOp < LLD < LLD < LLD < LLD radionuclides Ooerational c < LLD < LLD < LLD < LLD NOTES: a. Preoperational period is January 1979 -July 1982. Operational period is January 2017 -December 2017 b. LLD for operational data are listed in Appendix B c. During 2017 , all station related radionuclides from all sample locations were< LLD Page I 71 APPENDIX D 2017 AREOR G. O c e an Bo ttom S e d i men ts During the preoperational and operationa l periods , representative samp l es of ocean bottom sediments were collected semiannually from each of the Station dischar g e outfalls and from a c o ntrol station in Laguna Beach. The samples were analyzed for natura ll y occurring and SONGS related radionuclides. Duri n g the preoperationa l period. Manganese-54 (Mn-54) was detected in 5 of the 28 sam pl es. The concentrations of Mn-54 in t h ese samp l es ranged from 0.015 to 0.49 pCi/g, averaging 0.13 pCi/g. Cobalt-58 (Co-58) was detected in nine samp l es. The concentrati o n of Co-58 in the samples ranged from 0.013 to 1.16 pCi/g, averaging 0.20 pCi/g. Cobalt-60 (Co-60) was measured in 15 of the 28 samples. The concentration of Co-60 in the sample ranged from 0.014 to 8.1 pCi/g, averaging 0.79 pCi/g. Cs-137 was also detected in 16 of the 28 samples. The concentrat i ons of Cs-137 in the samples ranged from 0.014 to 0.090 pCi/g , averaging 0.039 pC i/g. Cerium-144 (Ce-1 44) was found in two samples. The concentration of Ce-144 in the samples was 0.06 and 0.26 pCi/g , respectively. Resu l ts of the 2017 data indicate that there has not been a build-up of radionuclides with time in ocean bottom sediments near SONGS. The results also ind i cate notable decrease in the concentrations of plant-related radionuclides in the ocean bottom sediment. Although Co-58, Co-60 , and Cs-137 are normally associated with nuclear power operations , preoperational study reveals no accumulation trend for these radionuclides , and no i ncrease in levels for these radionuclides was detected during the operational period. The concentration of station-rela t ed radion u clides in all ocean bottom sediment samples ana l yzed in 2017 was be l ow the MDC , supporting the conclus i on of no detectable i mpact on ocean bottom sediments from SO N GS. Tab l e 32 -Ocean Bottom Sediment Concentr at ion Mn-54 PreOp 0.015 -0.4 9 0.1 29 < LLD < LLD Ooerationa l < LLD < L L D < LLD < LLD Co-58 PreOp 0.013-1.160 0.199 < LLD < LLD Ooerational < LLD < LLD < LLD < LLD Co-60 PreOp 0.014-8.100 0.788 < LLD < LLD Ooerational < LLD < LLD < LLD < LLD Ag-110 m PreOp < LLD -0.020 < LLD < LLD < LLD Ooerat i onal < LLD < LLD < LLD < LLD Cs-137 PreOp 0.014 -0.090 0.039 < LLD < LL D Ooerational < LLD < LLD < LLD < LLD Ce-144 PreOp 0.060 -0.260 0.160 < LLD < LLD Ooerational < LLD < LLD < LLD < LLD All o t her SONGS PreOp < LLD < LLD < LLD < LLD rad i onuclides Ooerationa l c < LLD < LLD < LLD < LLD Page 172 I APPENDIX D 2017 AREOR NOTES: a Preoperational period is January 1979 -July 1982. Operational period is January 2017 -December 2017 b LLD for operational data are listed in Appendix B c During 2017 , all station related radionuclides from all sample locations were< LLD H. Marine Species (Flesh) Non-migratory marine species are collected semi-annually near SONGS. As a norm, marine species caught by the SONGS outfalls and from Laguna Beach include various species of adult fish, crustacean and mollusks. Upon collection the flesh portion is analyzed for gamma-emitting radion u clides as specified in the ODCM. The results are subsequently reported as pCi/g, wet weight. Results for several marine species for both the preoperational and 2017 operational periods for Units 2/3 are summarized in Table 33. The marine species used for purposes of comparison include: Sheephead (a fish), Blacksmith (a fish), Black Perch (a fish), Bay Mussel (a mollusk), and Spiny Lobster (a crustacean). Radionuclides analyzed but not included in Table 33 were below the lower limits of detection for both the preoperational and operational periods. During the 2017 operational period, no SONGS related radionuclides were detected above the MDC. The data indicate no accumulation trends. The operation of SONGS in 2017 had no impact on the environment as measured by this exposure pathway. Table 33 -Marine Species Concentration Co-58 PreOp 0.016 -0.030 0.023 < LLD < LLD Operational < LLD < LLD < LLD < LLD Co-60 PreOp 0.005 -0.044 0.017 < LLD < LLD Operational < LLD < LLD < LLD < LLD Ag-110m PreOp < LLD -0.004 < LLD < LLD < LLD Operational < LLD < LLD < LLD < LLD Cs-13 7 PreOp 0.004 -0.018 0.007 0.005 -0.012 0.007 Operational < LLD < LLD < LLD < LLD All other SONGS PreOp < LLD < LLD < LLD < LLD radionuclides Operational < LLD < LLD < LLD < LLD Co-58 PreOp 0.009-0.011 0.010 < LLD < LLD Operational < LLD < LLD < LLD < LLD Co-60 PreOp 0.004-0.045 0.017 < LLD < LLD Operational < LLD < LLD < LLD < LLD Ag-110m PreOp 0.002-0.009 0.006 < LLD < LLD Operational < LLD < LLD < LLD < LLD Cs-137 PreOp 0.003-0.015 0.008 0.004-0.014 0.009 Operational < LLD < LLD < LLD < LLD Page 173 APPENDIX D 2017 AREOR All other SONGS Mn-54 PreOp 0.009 -0.025 0.017 < LLD < LLD Operat i onal < LLD < LLD < LLD < LLD Co-58 PreOp 0.008 -0.080 0.028 Operational < LLD < LLD < LLD < LLD Co-60 PreOp 0.005 -0.400 0.077 < LLD < LLD Operational < LLD < LLD < LLD < LLD Cs-137 PreOp 0.003 -0.006 0.004 < LLD < LLD Operational < LLD < LLD < LLD < LLD Ru-103 PreOp < LLD -0.045 < LLD < LLD < LLD Operational < LLD < LLD < LLD < LLD All other SONGS PreOp < LLD < LLD < LLD < LLD radion u clides Operational < LLD < LLD < LLD < LLD Co-58 PreOp 0.007 -0.270 0.086 < LLD < LLD Operational < LLD < LLD < LLD < LLD Co-60 PreOp 0.0 1 4 -0.210 0.060 < LLD < LLD Operational < LLD < LLD < LLD < LLD Cs-137 PreOp 0.005 -0.011 0.008 0.040 -0.015 0.008 Operational < LLD < LLD < LLD < LLD All other SONGS PreOp < LLD < LLD < LLD < LLD radionuclides Operational < LLD < LLD < LLD < LLD NOTES: a Preoperational p e riod is January 1979 -July 1982. Operation al period is J a nuary 2017 -December 2017 b LLD for operational data ar e listed in Appendix B C During 2017 , all station related radionuclides from all sample locations w e r e< LLD d Species collected in 2017 i nclude California Mussel , Sheephead , Kelp Bass , Keyhole Limpet and Spiny Lobster I. Local Crops In the preoperational period of January 1979 through July 1982 , Sr-90 was detected in the contro l samples of kale, parsley , and squash. Naturally occurring K-40 was detected in cucumber , kale, and tomato samples from the indicator and control locations. Ce-144 and Zr-95 were detected in one sample of parsley at the control location at concentrations of 0.12 and 0.09 pCi/g, wet weight respectively. During 2017 , only natural radionuclides were identified in local crops , at both the indicator and contro l locations. The operation of SONGS had no impact on the environment as measured by this exposure pathway. Page 174 APPENDIX D 2017 AREOR J. Soil A comparison of operational and preoperational data does not reveal any accumulation pattern of SONGS related isotopes in soil. The intermittent detection of Cs-137 in both indicator and contro l locations is due to residual fallout from atmospheric nuclear weapons testing. The operation of SONGS had no impact on the environment as measured by this exposure pathway. Table 34 -Soil Concentration I 'i V..) .. . . , . ,,, " . . ., .. . Sr-90 PreOp 0.02 -0.08 0.044 < LLD -0.03 < LLD Operational N/A N/A N/A N/A Cs-137 PreOp 0.02 -0.20 0.096 < LLD -0.06 < 0.10 Operational <LLD-0.17 0.17 <LLD-0.193 0.117 All other SONGS PreOp < LLD < LLD < LLD < LLD radionuclides Operational < LLD < LLD < LLD < LLD K. Kelp Kelp is collected semiannually from three indicator locations and from a control location situated at Salt Creek. After collection , the samples are analyzed by gamma-spectral analysis for naturally-occurring and SONGS-related radionuclides. To assess the impact of SONGS operations on kelp, preoperational data were compared to 2017 operational data in Table 35. Radionuclides detected during the preoperational period for SONGS include Mn-54 , Co-60 , Zr-95, 1-131 , and Cs-137. During the 2017 operational period , 1-131 was detected in three indicator and one control sample. No other station related isotopes were detected in kelp samples during the 2017 operational period. Figure 10 shows a close correlation between indicator and control sample locations over an extended period of time. Although 1-131 activity has been detected in kelp since 1977 , there is no evidence that the concentration of 1-131 or other station related radionuclides are a result of operations at SONGS. The presence of 1-131 in kelp is apparently due to the sewer release of medical administrations of radioisotopes , since it has been detected consistently in control as well as indicator locations. S i nce 1988 the concentration of 1-131, when detected, has typically been highes t at the control locations. Page 175 ! .. t APPENDIX D 2017 AREOR Table 35 -Kelp Concentration ! *, * * ~. '. ,. " / * ~t '",. ; "{'Y,;; i"}* V.o;: " ' ' ' '. -. ('< : 'C:4?"'::

' ~:: ;~:* -. ::'"t f;";~:'*1::~~.;"?

"') .-* ?:., ,., ::};4"j ' t r ,, ' ' ! I :, * ' ' >:< * * * ' * ,,}~ I I * . . * .. :,' ,, , ,:*li.<r ., . ,:,t~ , , J r' .. , . ~, 1~,,... .. , * , ,.7 , , ,r '. I " ,. ' "~ 1 r ~... ' " .. ,,..,.,,j,.'.._,,;;.,* _.,J 11..t .. u,,~ "'"'~;i,,:,;, , """ f>li. .I,:,.; ; f...k-k.;. "~Ji,,,,,&.;,;. b<Jn"'., :~/. ,-;::. ~f,,;r;t-J.::<,az-1 iJ....,,)<,,, 1 r:it~~1, +. .. , < "' * ';;.Ji;' :.,,} Mn-54 PreOp < LLD -0.005 < LLD < LLD < LLD Operational < LLD < LLD < LLD < LLD Co-60 PreOp 0.006 -0.009 0.008 < LLD < LLD Operational < LLD < LLD < LLD < LLD Zr(Nb)-95 PreOp 0.014 -0.090 0.046 0.018 -0.053 0.036 Operational < LLD < LLD < LLD < LLD 1-131 PreOp 0.006 -0.024 0.013 0.008 -0.030 0.014 Operational 0.084 -0.133 0.113 0.081 -0.081 0.081 Cs-137 PreOp 0.004 -0.071 0.027 < LLD < LLD Operational < LLD < LLD < LLD < LLD All other SONGS PreOp < LLD < LLD < LLD < LLD radionuclides Operational < LLD < LLD < LLD < LLD The 1-131 results in 2017 are much higher than found during the preoperational program. However , all of the positive results were from the April 2017 sampling and were found in both indicator and control sample locations. No 1-131 was detected during the October 2017 sampling. These data, a l ong with there no longer being a viable production mechanism for 1-131 at SONGS, support the conclusion that the detection of 1-131 in kelp is due to factors external to SONGS. Page 176 APPENDIX E. DEVIATIONS FROM ODCM SAMPLING REQUIREMENTS IN 2017 2017 AREOR Page 177 APPENDIX E 2017 AREOR DEVIATIONS FROM ODCM SAMPLING REQUIREMENTS Devia t ions from the ODCM sampling requirements are identified below in accordance with sectio n 5.0 of the ODCM. The performance standard for environmental data collection of 95% was m et for all sample types. During 2017, the ODCM specified a priori LLD was achieved for all REMP samples. Deviations from the ODCM were associated with external factors not within the control of REMP personnel such as limited availability of marine samples at the locations speci fi ed i n the ODCM. The 2017 ODCM deviations had no meaningful impact on the REMP database and did not compromise the validity of the reported conclusions. A. Direct Radiation Thermoluminescent Dosimeters (TLDs) 1. During the 2017 1st quarter TLD change out on 4/5/2017, it was identified that TLD #46 (South State Parks Beach Trail #1) had the bottom of the TLD canister broken off (vandalism) and the TLD was missing. A new TLD canister and the 2nd quarter TLD was re-established at the location. This resulted in a total of 195 direct radiation samples on Table 14 instead of 196 samples. 2. Collection of three (3) TLDs located on Camp Pendleton was delayed for the second quarter due to denial of access from Range Control. TLDs are normally collected between April 1 and 10 , however they were collected on April 18 (AR 0317-39889). B. Air Sampling At SONGS , there are a total of 7 Indicator and 1 Control Air Samplers. Downtime for each air sampler in 2017 was due to weekly sample collection , annual Preventat i ve Maintenance (PM), and the change outs for the flow meters/pumps was appro x imately 46 minutes for each sampler. Weekly Change Ou t: 0.5 minutes (approx.) x 52 = 26 m i nutes Annu a l PM 15 minutes (approx.) Annu a l Flow meter/Pump change out 5 minutes (approx.) Downtimes in excess of 1 hour are addressed below for each ODCM required air sample. 1) Air Sampler #13 (Camp Pendleton). On February 21 , 2017 , Camp Pendleton schedulers cancelled our access into Alpha-2 Training Area due to hazardous conditions created by rain storm on February 17 , 2017. The roads in the area were impacted by flash flood conditions. The air sample was changed out on February 28 , 2017 and analyzed. This resulted in one 14-day sample instead of two separate 7-day sample periods as required by the ODCM (AR# 0217-28430). Thus the total number of REMP air particulate samples listed on Table 14 was reduced to 415 samples for 2017. 2) On June 20, 2017 , the air sampler pump failed after 95 hours of sample collection. The samples were collected and analyzed. There was no detectable licensed plant material on sample's media (AR 0617-23286). 3) On November 26 , 2017 Air Sampler #13 was out of service from approximately 0138 to 0518, due to a power outage at the MESA. 4) On November 28 , 2017 Air Sampler #13 was out of service from approximately 1202-1400 , due to a power outage at the MESA. In all t h ese events , the Radiological Effluent and Environmental Specialist reviewed previous and post event's data to verify that all ODCM LLDs were met. C. Ocean Water Sampling No de v iations were observed Page 178 APPENDIX E D. Drinking Water No deviations were observed E. Shoreline Sediments No deviations were observed F. Ocean Bottom Sediments No deviations were observed G. Marine Species (Flesh) No deviations were observed H. Local Crops No deviations were observed I. Soil No deviations were observed J. Kelp No deviations were observed 2017 AREOR Page 179 2017 AREOR APPENDIX F. LAND USE CENSUS Page I 80 APPE N DIX F 2017 AREOR Introduction The regulatory basis for conducting a Land Use Census (LUC) is identified in 1 OCFR50 , Appe n dix I , Sec IV.B.3. The purpose of the LUC is to " identify changes in the use of unrestricted areas and to permit modifications in monitoring program for evaluating doses to individuals from pr i nciple pathways of exposure." 1 In addition, Regulatory Guide 4.15, Rev. 1 , section C3 address that " written procedures should be prepared , reviewed, and approved for activities involved in carrying out the monitoring program." The 2017 LUC was conducted to compl y with the surveillance requirement as defined in the Offsite Dose Calculation Manual (ODCM) Section 5.2. The current Radiological Environmental Monitoring Program Procedure S012 3-IX-1.20 , Land Use Census, establishes the method of documenting and verifying land use results obtained in compliance to San Onofre's Technical Specifications and ODCM. Executive Summary The land area around San Onofre Nuclear Generating Station (SONGS) is not subject to significant change due to the nature of the land uses. The area around SONGS is divided into sixteen (16) geographical sectors. The Pacific Ocean and United States Marine Corps (USMC) Base Camp Pendleton comprise 13 of the 16 sectors surrounding SONGS. The City of San Clemente (a mature municipal area) and coastline comprise the remaining three sectors. Therefore , the characteristics of the local land area substant i ally inhib it significant land use chang e s. Definition of Uses Residence is defined as any structure (single-family house , apartment, mobile home, barracks or sim i lar unit) that is occupied by an individual(s) or resident(s) for three months or longer in a given y ear. Other Specified Use is defined as a location occupied by members of the general population as oth e r than their pr i mary residence. The use is divided into two categories

employment and non-employment related. Employment use is defined as a location occupied by members of the general population engag e d in normal work activities regardless of the length of time spent at the location, and regardless of its permanence, including concession stands , restaurants , campground hosts , marke t s and guard shacks. Non-employment-related use is defined as a location occupied by members of the general popul a tion who are not engaged in normal work activities , including campgrounds, temporary housing, time-share condominiums, motels, hotels , schools and beaches. Milk animals are cows, goats , and sheep whose milk is used in dairy products for human consumption.

Meat animals include, but are not limited to, deer , cattle , goats and sheep whose meat is used for human consumption. 1 10 C F R 50 Appendix I , Section IV , B.3 Page I 81 APPENDIX F 2017 AREOR Fresh, leafy vegetables include , but are not limited to , lettuce , cabbage and spinach. Fleshy vegetables include , but are not limited to , tomatoes , cucumbers, cauliflower and sweet corn. The Land Use Census Scope The land area around SONGS includes both Orange and San Diego counties. The Orange County portion includes a portion of the city of San Clemente ( official population as of July 2016 is 65 , 309 per the city's demographics and statistical information website) and the San Clemente State Park. The San Diego County portion includes much of the (USMC) Base Camp Pendleton , San Onofre State Beach and Park , and SONGS itself. The LUC map is divided into 16 geographical sectors: A , B , C , D, E , F , G , H , J , K , L, M , N , P , Q and R. The ODCM surveillance requirement is performed by identifying the location of the nearest garden greater than 500 square feet, nearest milk animals , nearest residence , and other i dentified land uses in each of the sixteen (16) geographical sectors within a distance of five (5) miles from San Onofre Units 2 and 3. In addition , the Land Use Census aids in detecting changes in the presence of hazardous manufacturing and handling facilities within the five (5) mile radius. The methodology consists of reviewing data from the previous LUC reports and verifying if any information has changed. The LUC is conducted and updated at least once per 12 months between the dates of June 1st and October 1st. Also , non-resident i al usage such as fire stations , surf camps and other potential pathways of exposure to an indiv i dual are identified due to the fact that these usages are closer to full time residence based on information provided by the appropriate point of contact or agency. Secto r s A, B , C , D , E , and F include land within the boundaries of (USMC) Base Camp Pendleton. The study area in sector G includes the area along the coast south of SONGS. Secto r s H, J , K , L , M , and N are the Pacific Ocean , therefore no land use possible. Sectors P , Q , and R include a section of San Clemente and part of Camp Pendleton. Research Methodology Completion of the 2017 SONGS Land Use Census required conversations with agencies , organ i zations, individuals and field research. The Radiological Effluent and Environmental Specialist reviewed the previous 2016 LUC and associated documentation spreadsheet. Then the data was verified. If changes occurred , then changes were reflected in this Land Use Census. This was accomplished by contacting the point of contact for the appropriate agency, organ i zation, or military base whom possessed knowledge on the land usage. The following agencies and organizations were contacted or additional information was researched through their respective websites:

• California Highway Patrol
• Orange County Agricultural
• State of California Department of Parks and Recreation , including San Onofre State Beach
• United States Border Patrol
• USMC Base , Camp Pendleton
• City of San Clemente In cases where it was deemed appropriate, letters requesting information were sent t o residents that in the past Land Use Census have identified gardens 500 square feet or greater. The Page I 82 APPENDIX F 2017 AREOR United States Border Patrol did not respond to our inqu i ries due to national security so an " estimated hours of occupancy" value of 2400 hours was utilized.

It was determ i ned that military personnel would have complete control over the land uses w i thin the i r jurisdict i on. Communication provided by the point of contac t s from Camp Pendleton and State Parks was considered final. Agency contact and documentation were completed in comp li ance w i th the Land Use Census procedure. Field Research During and after the completion of the preliminary research , field research was undertaken to confirm i nitial find i ngs and obtain further information necessary to complete the Land Use Census. Field research was initiated i n mid-August 2017. Data and Methodology Summary The appropriate i ndividual or organization was identified for each ex i sting and new LUC location. The ind i vidual or organization was contacted to determine the use and occupancy for that loca t ion. For each LUC l ocation , the appropriate individual was asked to provide an estimate of annual occupancy based on personal knowledge of the location. The information gathered i s summarized in Table 1. Additional information , not requ i red by the ODCM , has been included in Table 2 for historical trending purposes. Documentation Spreadsheet Throughout the study , records of contacts and findings were mainta i ned in accordance with the Land Use Census Procedure , S0123-IX-1 .20. A documentation spreadsheet was prepared and retained in the Rad i ological Effluents and Environmental files. The spreadsheet may have telephone notes , agency contacts , Southern Cal i fornia Ed i son (SCE) memoranda , and any other types of correspondence. 2017 Land Use Census Observations and Changes The follow observations were noted:

• Historically , several gardens have been identified on Avendia Salvado r and documented i n the Land Use Census. A drive by was conducted and the following was obser v ed: o Only a plot of land existed with an absence of a garden at 788 Avend i a Salvador.

Its designation was G-17. Since this plot of l and has no garden , l etters were sent to the owners at 786 Avendia Salvador and 790 Avendia Salvador addresses to veri f y any potential gardens. o The owner at 786 Avendia Salvador in San Clemente located in Sector R , stated that a garden existed on the property. The newly identified garden was given the designation G-19. o The owner at 790 Avendia Salvador stated that a garden no longer existed. This garden was g i ven the designation G-20.

• The SONGS indicator garden was relocated to a location near Air Sampler #11 in order to return a portion of the MESA t o the Department of the Navy. (from 0.4 miles NNW to 0. 7 miles NNW).
• The sewage treatment plant tha t is northeast of the Mesa property was being upgraded with new storage tanks and equ i pment. Per the Camp Pendleton contact , this will not be manned continuously. The sewage treatment plant workers are required to check in on the facility 3 to 4 times a day. Page 183 APPENDIX F 2017 AREOR Chemical and Toxic Waste The p r esence of manufacturing facilities , chemical plants , and toxic waste sites was researched to provide information in detecting any hazardous chemicals , which could impede the operation of SONGS through fire, explosion, or chemical spills. Some manufacturing is located in the northeastern section of the city of San Clemente and is outside the study area. No such uses are allowed to exist in the commercial and residential areas of the city of San Clemente within the study area. In Camp Pendleton, there are no designated manufacturing or chemical use areas within the 5 mile radius of the plant based conversation with Camp Pendleton's Director of Community Plans and Liaison Office. Milk Animals No da i ries or other facilities producing milk for human consumption were identified in 2017. Meat Animals No ag r icultural meat animals were identified during the 2017 LUC. The only known meat animal pathway land uses is recreational hunting. Deer graze year round on Camp Pendleton.

Growing Season for fleshy and leafy vegetables Leafy vegetable samples are available at the SONGS garden year round. Fleshy and leafy vegetables were available approximately eight months during 2017 at the SONGS garden. Desalination Plant in Carlsbad, California The Carlsbad desalination plant ( officially known as the Claude " Bud" Lewis Carlsbad Desalination Plant) opened on December 14, 2015. The plant is 27 miles south of SONGS. It is located on the coast adjacent to the north end of the Encina Power Station. The plant produces approximately 50 million gallons of water per day. It is the largest and most technologically advanced desalination plant in the Western Hemisphere. The plant produces enough water to meet the daily needs of 300 , 000 San Diego residents Summary of Changes For the period of July 1, 2016 to June 30 , 2017 , the Camp Pendleton deer hunting take data was updated and reflected in Table 3. Per the USMC wildlife biologist, the exact location of a particular kill was not known. The reported take area should be interpreted as an estimate of approximate location. Thus a deer reported taken in hunting area Alpha 2 may actually have been taken in an adjacent hunting area (such as Romeo 3 or Bravo 3). There were no changes to the estimated distances from SONGS to the nearest vegetation potentially consumed by deer from July 1 , 2016 through June 30, 2017. Page I 84 APPENDIX F Distances to nearest vegetation typ i cally consumed by deer: Units 2/3 Sector p Q R A B C D E F G Distance from Units 2/3 (miles) 0.3 0.3 0.2 0.1 0.1 0.1 0.1 0.2 0.3 0.1 2017 AREOR Page I 85 APPENDIX F 201 7 AREOR Table 1 -SONGS 20 17 Land Use Census -E i,' -E i,' ! 0:, C: 0 :, C: .~ Units Miles ' :, )( :, Miles Miles ::, *x::, 0"' 8 2/3 from j _g; 8 from from .c~o Sector LUC# Residence U2/3 L UC# Gardens U2/3 L UC# Other Specified Uses U2/3 A R-A1 Camp San Mateo 3.6 FTR 0-8 Camp San Mateo Motor Pool 3.6 2 , 000 22 SCE Land Uses 0.4 B 0-9 USMC CP Sanitary L and Fill 2.1 816 C R-C2 Camp San Onofre F i re Station #7 52 Area 2.4 FTR 0-10 Camp San Onofre (STP #11} 2.2 2 , 000 R-C1 Camp san Onofre Barracks 524101 2.8 FTR R-C3 Camp San Onofre Barracks 2.6 FTR D R-D1 Camp San Onofre B arracks 3.0 FTR E R-E1 Camp H omo Barracks 4.1 F T R 0-5 Cam p Homo M oto r P oo l 4.0 2 , 500 F 0-1 San Onofre State Beach Guard Shack 0.8 1 , 500 31A Border Patrol Checkpoint (N B) 1.9 2,400* 318 H wy P atrol W eigh Station (NB) 2.1 1 , 960 G R-G1-San Onofre State Park-camps it e s#99-104 3.0 FTR 0-2 San Onofre Beach Campground 1.8 720 2 Camo Host Volunteers over 18 yrs. 32 H wv P atrol Wei o h Statio n (S B l 2.1 1 , 960 0-2A E n d less Summer Surf Camp (see notes) I 2.8 4 , 380 Campground Host 0-2B YMCA Surf Camp (see notes) 2 576 Sectors H , J , K , L , M , and N have no identified land uses T hese sectors are p rimarily the P acific Ocean and contain only a small portion of the plant site , an d a beach walkway providing access for state beach park users north & s o uth of S O N GS. p R-P3 San Onofre Rec Beach (SORB) 1 FTR G-3 4130 Calle Isabella 2.8 0-6 Surf Beach (Lifeouardl 0.5 800 R-P2 San Mateo Po i nt housing 2.7 FTR G-14 4090 Calle Isabella 2.9 3 Trestles Beach Lookout tower 1.8 500 R-P1 Cotton po i nt Estates 2.7 FTR 0-2 D Summer Sou l Surf Cam p 0.5 4 40 Q R-Q5 SORB Resident Emp l oyee 1.1 FTR G-8 2240 Ave Salvador 4.1 0-3 State Park Office Trailer 0.69 2 , 000 R-Q2 San Onofre Il l housing 1.4 FTR G-5 1706 S Ola Vista 4.4 5 Surf Beach Guard Shack 0.7 1 , 500 R-Q3 San Mateo Po i nt Housinq 2.7 FTR G-15 130 Calle del Pacifico 4 18 S O R B Lifequard Tower 1.2 2 , 0 00 G-18 115 Ave San P ablo 4.1 1A S O RB Camporound Check-in 1.3 2 , 0 00 R R-R1 S an Onofre Ill housinq 1.3 FTR G-10 SO N GS Garden 0.4 G-19 788 Ave Salvador 4.9 Bold Text indicates a change from the 2016 LUC Data as of 9-30-2017 FTR -Full Time Residence Page 186 APPENDIX F 2017 AREOR Table 2 >, -g _ E g ~-Eg Un its Miles coo E [ M iles M il es ro o E 2/3 from E *-:, from from 8 Residence ::J 8 Gardens Other Specified Uses Sector LUC# U2/3 w _g 5 o LUC# U2/3 LUC# U 2/3 ,\4 :2 s n A R-A2 SON GS Camp Mesa 0.4 FTR 24 Cristian ito s Fire Sta tion 5 3 , 984 B C D E F G G-6 1315 S Ola Vista 4.6 0-2C SurfCamp.co m State Beach Surf Camp 2.3 did not o ccupv San Onofre Par k in 2012 Sectors H , J , K , L , M and N have no i dentified land uses. These sectors are p rim a ri ly the Pa cific Ocean and contain only a small portion of the plant s it e , and a beach walkway provid in g access for state beach par k users north & south of SONGS. p R-P5 Con tractor overnight parking 0.6 1040 in Lot 4 Q 11 Stat e Parks Ma in Offices 3.5 FTR 14 3 W San Anton i o 4.3 7 SORB Clubhouse (p ermanently closed per USMC) 16 147 W Jun i pero: 4.1 B USMC Exchanoe & Commissarv 1.7 2 , 000 G-6 1315 S Ola Vista 4.6 9 Basilone Road USMC Entrv Gate 2 520 G-16 432 Ave Crespi 3.8 12 San Mateo Campground 2.9 4 , 380 17 Beach Con cession (Pier Sha ck and Grill) 4.5 2 , 600 13 B each Con cession (Califia Beach Cafe) 3.9 1 , 200 R 20 Sea R i dge Estates 4.5 FTR G-17 788 Ave. Salvador 4.9 19 Camp San Mateo (STP#12) 3.7 2 , 000 !This is an emptv lotl R-R3 SONGS Drv Camping PL 12 0.7 2136 G-20 790 Ave. Salvador 4.9 21 Cristianitos USMC E ntry Gate 4.1 520 R-R2 SONGS Camp Mesa (See 0.4 FTR 23 Cristianitos USMC Gas S tation 4.1 2 , 000 notes for Table 1) Bold Text indicates a change from the 2016 LUC. Data as of 9-30-2017 FTR -Full Time Residence Page 187 APPENDIX F 2017 AREOR NOTES FOR TABLES 1 AND 2 RESIDENCES LUC# Description R-A1 CAMP SAN MATEO (barracks)-This is an employment and an FTR land use location for persons 17 and older. R-A2, CAMP MESA-Former FTR and is permanently closed. R-R2 R-C2 CAMP SAN ONOFRE FIRE STATION-This is an employment and FTR land use location for persons 18 and older R-C1 , CAMP SAN ONOFRE (barracks)-This is an employment and FTR land use locations for R-C3, persons 17 and older R-D1 R-E1 CAMP HORNO (barracks)-This is an employment and a FTR land use location for persons 17 and older R-G1 San Onofre State Park-(2) Camp Host Volunteers live FTR at campsites

1. 99-104. R-P1 COTTON POINT ESTATES-This is a FTR for all age groups R-P2 , SAN MATEO POINT HOUSING-This is a FTR for all age groups R-03 R-02, SAN ONOFRE Ill housing-This permanent housing development is a FTR for all age groups R-R1 R-P3, SAN ONOFRE RECREATION BEACH (SORB)-This is a FTR for SORB employees and R-05 campground hosts (age 18 & over). This is also a non-employment land use location (camping) for all age groups. A person or family may camp at SORB for a maximum of 60 days per calendar year VEGETABLE GARDENS Historically, several gardens have been identified on Avendia Salvador and documented in the Land Use Census. A drive by was conducted and the following was observed:

• Only a plot of land existed with an absence of a garden at 788 Avendia Salvador. Its designation was G-17. Since this plot of land has no garden, letters were sent to the owners at 786 Avendia Salvador and 790 Avendia Salvador addresses to verify any potential gardens.
• The owner at 786 Avendia Salvador in San Clemente located in Sector R, stated that a garden existed on the property. The newly identified garden was given the designation G-19.
• The owner at 790 Avendia Salvador stated that a garden no longer existed. This garden was given the designation G-20. Based on the updated information, Figure 4 was revised to reflect the current active gardens. Page 188 APPENDIX F 2017 AREOR OT H E R LUC LOCATIONS CLOSER THAN THE CLOSEST RESIDENCE LUC# Description 0-1 SAN ONOFRE STATE BEACH GUARD SHACK-this i s an employment land use location for persons 18 and older. 0-2 SAN ONOFRE BEACH CAMPGROUND

-Th i s is a non-employment (recreational) and use location for all age groups. 0-2A ENDLESS SUMMER SURF CAMP/CAMPGROUND HOST-The Endless summer Surf Camp and the State Parks Campground host are located in spaces 100 to 103. The maximum occupancy for persons age 18 and older is 4380 hours. The maximum occupancy for persons 17 and younger is 360 hours. This is both an employment and a non-employment land use l ocation. 0-2B YMCA Surf Camp 0-2C Summer Soul Surf Camp-Summer Soul Surf Camp is a day camp that takes place at Dog Patch beach in San Onofre Beach. The maximum occupancy for persons age 18 and o l der is 440 hours. The max i mum occupancy for 17 and younger is 40 hours. 0-3 STATE PARK OFF I CE TRAILER-This is an emp l oyment land use location for persons 18 and older. 0-5 CAMP HORNO MOTOR POOL-This is an employment land use l ocation for persons 17 and older. 0-6 SURF BEACH (LIFEGUARD) -This i s an e m ployment land use location for persons 18 and older. 0-8 CAMP SAN MATEO MOTOR POOL-This is an employment land use l ocation for persons 17 and older. 0-9 USMC CP SANITARY LANDFILL-This is a n employmen t land use location for persons 1 8 and older. 0-10 CAMP SAN ONOFRE WASTE WATER TREATMENT PLANT (STP #11 )-Th i s is an employment land use location for persons 18 and older. R-C2 SAN ONOFRE FIRE STATION #7 52 AREA-This is an employment land use location for persons 18 and older. 1A SORB CAMPGROUND CHECKIN-This is an emp l oyment land use location for persons 18 and older. 3 TRESTLES BEACH LOOKOUT TOWER-Th i s is an employment land use location for persons 18 and older. 5 SURF BEACH GUARD SHACK-Th i s is an emp l oyment l and use l ocation for persons 18 and older. 18 SORB LIFEGUARD TOWER-Th i s is an employment land use loca t ion for persons 18 and older. 22 SCE Land Uses-Are occupied by unmonitored SCE workers 31A BORDER PATROL CHECKPOINT -Th i s is an employment land use location for persons 18 and older. 31B HIG HW AY PATROL WEIGH STATIONS-These are employment land use locations for 32 persons 18 and o l der Page I 89 APPENDIX F 2017 AREOR Table 2 Notes: Table 2 locations are not mapped. The garden land uses listed in Table 2 do not exist (LUC #14 and LUC #16 gardens have been paved over and are no longer able to support vegetation growth). LUC G-6 and G-16 no longer have gardens on property. SONGS Camp Mesa is no longer a residence and is permanently closed. The " other specified uses" locations listed in Table 2 are further away from the midpoint of Units 2/3 that is closest to the full time residence (all age groups) in the corresponding sector. The residences listed in Table 2 are not the closest full time residence in the corresponding sector. The Table 2 locations have been retained for historical trending purposes and are not required by the ODCM. A review of the business need to continue including these locations was closed in March 2013 because these locations were used to track locations that in the past were input for R(i) tables' calculations and they need to remain in the LUC. Refer to NN (Nuclear Notification) 202232049. R-P5Contract Worker in Parking Lot 4-This was a 6 month residence for a contract worker that slept in personal vehicle in between shifts until 4/1/2013 (NN 202649118). This is an inactive residence. Page I 90 APPENDIX F 2017 AREOR Table 3 -Camp Pendleton Hunting Take Data. July 1 , 2016-June 30 , 2017 Deer Hunter Sm Game Hunter Area Effort Effort Deer Coyote Dove Quail Rabbit Sauirrel Pigeon H o urs Hours Alpha-1 B(3), C(3.2) 227 17 1 0 0 0 0 0 0 Alpha-2 E(0.8), D(0.8}, C(3) 93 25 2 0 0 0 0 0 0 Alpha-3 0(2.2) 60 320 0 0 0 23 11 6 0 Bravo-2 8(3.8), A(4.2) 77 145 1 0 0 1 2 0 0 Bravo-3 B(1.6}, A(1.8}, R( 1.8) 60 250 0 0 0 0 0 0 0 R ome o-1 E(1) 29 5 1 0 0 0 0 0 0 Romeo-2 E(2.6) 99 28 4 0 0 1 0 0 0 Romeo-3 E(1.4}, F(1.5) 88 52 3 0 0 4 0 0 0 Papa-2 & Tango F(5) 55 36 3 0 0 0 4 4 0 Totals 788 653 15 0 0 28 17 10 0 1. The t otal hunting hou r s includes t i me attributable to multiple i ndividuals. Th i s value bounds the maximally exposed i ndiv i dual. Page I 91 APPENDIX F 2014 II.and Use C,ens.us la.nd IJMS 4 ~onal & Recrnlional U-0 Unit& 2'J3 Miq)oint 0 ----..-....... -~-~ ... -*----o.e..-- --.. -*--~-.... ,....,...._._.....,. -*IO!foi-,.......,-Ql$ T-..0.. '°"ll"llt*...-.,~-~ l~~--~9.1'~ _...,.,. e.,,_... *-_...,& eo,._.., Ma;la -2017 AREOR Page j 92 APPENDIX F 5 , 0!D """"* Figure2 2016 Land Us@ CGnsus RP.s i rl 1 mr.P_~

• Residenc~

o Units 213 Midpoint 0 : 211 1 6 LlJQ..Fla=2~e s;l:lmcrs.n'JII Tu.ow>>". o..J:vuc:11 Ole 20 1 11 5 , 000 Feet Fa1w'<s d!eplcled r,,,re1n..., p J 111m , g ieve l aca:ncy , and 1ntendrd1<1r-.....,,,o1p~0111y. 0_.,,.,. _be ll"1a1rd atllllsscal e.--CCl'ISU'I wnn a:ie prq:1er axu m e na or acaenaes suc!lfteobr=.ORealP,ope,t=*M-and Gi a illomos -.. "'""' ts* reglslen!d-ar Ranod McNaly 2017 AREOR ,./ J Page I 93 APPENDIX F F i gure 4 2017 L and Use C ensus Gardens

• Gardens Greater than 500 SQ. ft. 0 Units 2/J Midpo i nt 0 0.5 M i les ,:iP, ......... ?1"1 1 7 1 ,.r._~v""'_r,;.~

nw d Ou: Tlur,d;ay. Seplem>er 14 , 2017 ~ealUrM Oepided hemn are puwu,g level accuracy. and intended lor nr..m.tional purposes ontv. Distances and locations ma,y i,., dislort2d at m S<:ille. AM.Ifs consult wih the .,._leoal doannents or --regarding such leaue:s. 0 Re.ol Pn,periies

• Mapping and G I S. Thomas Bros. Maps IS a regis-hdeman; ff Rand MdW'f ,. c....,....,,..

Repn,duocd -.. ......,,..... 8""""° by R.-,d McNaly-& ~-0 Rand .Mc:Naly & CCll!1)0nf. N. nght> re,erved , 2017 AREOR 5.mile radius...._ Sec t o E Page I 94 APPENDIX F Figure 5 2014 Land Use Census Other Uses 0 Units 2/3 Midpoint

• other Speafied Uses 0 0.5 Milas F"8 Na"'° 2014LUC_F,gu<e5_00,...__ ""d Dote Th..-Y , S,,,,00,.-

2~ 2014 F ... .,..~ he<-... pion<w,g -""""""' ond .......... fof ..,,,._.,nat ~Ofll)' O..nca ancr IDc:abonl tn1y be dtstorlld et th4 acale A~'f' coneutt _the_logal_n11cr_.....~ ...,. _,,_ ORNI Pl'-* Ma""'ng ondGIS T....,_B<oo,.,,.

• • reg--rt.o/Rand & ~nv R4'Pt0duotd......, peffffl,IH)n g,al"Nd i,y Rend -.Jty & eon-.,.ny ORand -& /J <,it,11 -2017 AREOR Page 195 20 17 AREOR APPENDIX G. ERRATA TO PREVIOUS AREORs Page I 96 Appendix G 2017 AREOR The 2 016 AREOR text references incorrect number of cross check samples and an incorrect acce p tance rate. Per the 2016 Annual Environmental Quality Assurance (QA) Report , GEL performed 501 ind i vidual cross check analyses representative of samples analyzed for SONGS. The accuracy of each result reported to Eckert & Ziegler Analytics , Inc. is measured by the ratio of GEL's result to the known value. Over 98% of the cross-check sample results were acce p table , which satisfies GEL's QA criteria. Page 197 2017 AREOR APPENDIX H. CDPH CO-LOCATED TLDs Page 198 Appendix H 2017 AREOR C DP H TLDs CO-LOC A TED W ITH R EMP TLDs DURING 2017 California Department of Public Health (CDPH) maintains a TLD program i n the environs of SO N GS. Per DPH (Department of Public Health) request, the results of CDPH dosimeters that are co-located with SONGS dosimeters are reported below. Table 3 6. 2017 Data from REMP TLDs (mR/ standard quarter) 1st 2nd 3rd Location Number Location Name Qtr. Qtr. Qtr. SCE-1, NRC-7, DPH #2 City of San Clemente 11 7 15 SCE-2, NRC -23, DPH #8 Camp San Mateo 13 9 16 SC E-3 , NRC-19, DPH #9 Camp San Onofre 10 8 12 SCE-6, DPH #10 Old El Camino Real (Old 4 3 5 Highway 101) (ESE) SCE-10, NRC-12, DPH #6 Bluff (Adjacent to PIC #1) (San 13 6 14 Onofre Surfing Beach) SCE-22, NRC 11 , DPH #4 Former US Coast Guard Station 14 10 14 -San Mateo Point SCE-34, NRC -14, DPH #5 San Onofre Elementary School 8 10 12 SCE-50, NRC 32 , DPH #13 Oceanside Fire Station 9 9 12 Note: Requirements in the standard Technical Specifications (TS) adopted under the TS Improvement Program i nclude reporting results of TLDs that are co-located with NRC dosimeters.

The NRC dosimeters were exchanged by the CDPH under contract with the NRC. Th is contract expired in December 1997 and the NRC TLDs were no l onger being deployed around SONGS. See App endix I of th e " 1997 Radiolog ica l Environmental Oper ating Report", April , 1998 The CDPH TLD results confirm that SONGS does not have a significant impact on di r ect radiation exposures in the environment. 4th Qtr. N/A 11 10 3 8 11 9 9 Page 199 --*------, 2017 AREOR APPENDIX I. ISFSI TLD DATA Page 1100 APPENDIX I 2017 AREOR Summary Per 1 O CFR 72.126, SONGS implemented an area monitoring TLD program in the vicinity of the ISFSI. In the fourth quarter of 2001, 21 pre-operational TLDs were deployed in the area around the ISFSI foundation then under construction. This pre-operational TLD data are compared to the data obtained after the commencement of used fuel storage in the ISFSI for the purposes of estimating the additional exposure attributable to the operation of the ISFSI. An evaluation of the entire REMP TLD database yielded an estimated background exposure rate o f approximately 15 mR/std. quarter (91 days). However , some local variability within the CAB / EAB is to be attributable to factors external to SONGS. Another variable for the measured exposure rate is transit exposure to and from the TLD lab. The transit exposure is variab l e and is corrected by the lab. Therefore, a comparison of pre-operational data and operational data needs to be considered in conjunction with a comparison of ISFSI TLD data and the estimated baseline background exposure rate within the EAB. Environmental exposure rates are variable and small changes in TLD location can measurably change the data. SONGS REMP TLD data show an environmental seasonal variability that does not appear to be related to any activities at SONGS. The ISFSI TLD data gathered to date appears to follow a similar seasonal variability (Figure 14). In addition to environmental factors, some non-lSFSI work activities at Unit 1 have elevated the pre-operational measured ISFSI TLD e x posure. The storage and transport of radioactive materials and waste near the location of the ISFSI founda t ion area in 2001 and 2002 appears to have elevated the exposure rates of TLDs 306 to 315. I n addition, the movement of the Unit 1 reactor vessel in October 2002 caused a noticeable increase in the measured exposure for TLDs 301 to 315. The measured exposure rate for the ISFSI TLDs close to the ISFSI is consistent with the exposure rate expected from known radiological work activities. The elevated exposure rate from TLDs 301, 302, 303, 304 , 323 , 324, 325 , 326 , 327 and 328 is primarily due to the movement and storage of used fuel at the ISF S I. In the second quarter of 2011 additional TLDs 327 and 328 were placed along the fence on the southwest side of the ISFSI. These TLDs routinely have the highest measured doses , as they did in 2017. These locations, however, are not accessible to members of the public. Publicly accessible REMP TLDs include SCE-55 , SCE-56 and SCE-57. Only SCE-55 (San Onofre State Beach) recorded measurable dose, at approximately 14 mrem/yr. In 2016, additional ISFSI TLD locations were added immediately along the fence and seawall south and west of the ISFSI: Locations SCE-339 , 340, 341, 342 , 343 and 344 (see Figure 13). Starting in the fourth quarter 2010 neutron dosimeters were placed in ISFSI TLD canisters 311, 324, 325, and 326. In the second quarter 2011 neutron dosimeters were also placed adjacent to TLDs 327 and 328. Beginning in the 4 th quarter of 2016, neutron TLDs were co-located with locations SCE-339 through SCE-343. The neutron TLDs were added to obtain neutron informati o n prior to the off load of spent fuel from Units 2 and 3. The 201 7 neutron TLDs identified measurable levels of neutron radiation from spent fuel in storage. A dose equivalent conversion factor for the TLD neutron signal of 10.5 mrem/mR neutron h as been applied, based on a similar ISFSI facility at another site. It is being applied to the SONGS TLD results only to provide an estimate of the neutron dose equivalent being measured. The neutron dose is not significant, and has been included in the quarterly results for these locations in Table 37. Page I 101 APPENDIX I 2017 AREOR Neutron exposure during fuel transfer is measurable at the fence surrounding the storage facility at low levels , estimated to be less than 3 mrem per quarter. These measurements demonstrate that the neutron exposure is bounded by the projected neutron dose rates in calculation SCE-23-0508 , is well within the limits specified in 1OCFR72.104 (0.25 mSv (25 mrem) to the whole body, 0. 75 mSv (75 mrem) to the thyroid and 0.25 mSv (25 mrem) to any other critical organ , and is cons i stent with known ISFSI rad i ological conditions. The measured ISFSI gamma TLD exposure rates were also determined to be consistent with the calculated ISFSI dose rates and know n rad i ological conditions. The r e sults from all locations at the fence around the ISFSI pad show that a member of the public , if at those locations and adjusted for occupancy pe r SDS-RP1-PCD-1007 , is less than 2 mrem per year , well below regulatory limits. Page 1102 APPENDIX I 2017 AREOR Tab l e 3 7. 20 17 ISFSI T L D Data 301 15.8 18.0 18.0 17.1 17.5 ND ND ND ND 70.6 ND ND 302 15.8 21.1 21.6 19.8 19.4 5.3 5.8 ND ND 81.9 18.9 1.1 303 15.8 21.1 20.8 1 9.7 20.5 5.4 5.0 ND ND 82.1 19.0 1.1 304 15.8 20.7 20.4 19.2 19.5 ND ND ND ND 79.8 16.7 1.0 306 15.8 21.0 20.8 1 9.1 19.2 5.3 5.0 ND ND 80.2 17.1 1.0 307 15.8 17.5 16.6 15.4 15.4 ND ND ND ND 64.9 ND ND 308 15.8 19.4 19.3 17.6 18.4 ND ND ND ND 74.7 11.6 0.7 309 15.8 19.9 20.4 18.9 18.2 ND ND ND ND 77.5 14.4 0.8 310 15.8 20.3 20.5 18.5 19.2 ND ND ND ND 78.4 15.3 0.9 311 ISFSl-01 c 15.8 19.5 20.1 18.5 17.8 ND ND ND ND 75.8 12.7 0.7 312 15.8 14.8 15.1 14.8 13.8 ND ND ND ND 58.6 ND ND 314 15.8 19.4 20.0 1 9.6 18.8 ND ND ND ND 77.8 14.7 0.8 315 1 5.8 19.2 19.0 1 8.9 17.5 ND ND ND ND 74.6 11.6 0.7 316 15.8 15.5 16.0 1 4.8 14.8 ND ND ND ND 61.0 ND ND 317 15.8 16.0 16.5 15.0 15.1 ND ND ND ND 62.6 ND ND 318 e 15.8 18.4 19.1 18.4 1 7.4 ND ND ND ND 7 3.2 10.1 0.6 319 e 15.8 18.7 20.6 18.8 17.4 ND ND ND ND 75.6 12.6 0.7 320 e 15.8 18.2 18.9 18.2 17.7 ND ND ND ND 73.0 ND ND 321 e 15.8 19.3 19.3 1 9.4 17.4 ND ND ND ND 75.4 12.3 0.7 322 15.8 1 6.8 18.4 17.1 16.3 ND ND ND ND 68.6 ND ND 323 1 5.8 20.3 20.1 1 9.4 1 9.0 ND ND ND ND 78.9 15.8 0.9 324 ISFSl-04 c 15.8 23.9 25.0 23.1 21.7 8.1 9.2 7.3 5.9 93.7 30.6 1.7 325 ISFSl-03 c 15.8 23.8 26.5 26.2 22.4 8.0 10.8 10.4 6.6 98.9 35.8 2.0 326 ISFSl-02 c 15.8 24.7 22.5 22.7 19.2 8.9 6.7 6.9 ND 89.1 26.0 1.5 327 ISFSl-05 c 15.8 43.4 48.7 44.5 49.2 27.6 32.9 28.8 33.4 185.8 122.7 7.0 328 ISFS l-06 c 15.8 44.8 49.3 34.0 36.1 29.0 33.6 18.2 20.3 164.1 101.0 5.8 339 ISFS l-08 c 15.8 20.0 20.7 19.2 19.4 ND ND ND ND 79.2 16.2 0.9 340 ISFSl-09 c 15.8 18.7 19.4 17.5 18.3 ND ND ND ND 73.9 10.9 0.6 341 ISFSl-10 c 15.8 19.7 21.6 18.6 18.9 ND 5.8 ND ND 78.8 15.7 0.9 342 ISFSl-11 c 15.8 21.3 21.6 20.0 20.0 5.6 5.9 ND ND 83.0 19.9 1.1 P a ge I 103 APPENDIX I 2017 AREOR .. . . ..................

---

==**-...... ,,,.. .. ,.. **-**=-==--*=.-*1

... "'~ '"""~, v'"" "' ),~,..,~,,,,.,,-,.:.;..,._":I..._ ~:>:,.,. -,,.-:.. ... "',*)'""" ",,.. ~~-:r-1;:; "¥<-~'>:."..::"~ ~,,_,i:;,t,'\.1-;.~~v"~~'f't*-'i~1:1 ~i!~ --~------~--. -**. *-------~. ,_.*'. ;{!{ . , .. '. , ..*.... :: *: :~*** ~/?;'.~ ;_:;J.t 11?.: :iii .. 343 ISFSl-12 c 15.8 21.4 22.5 18.9 20.9 5.6 6.7 ND 5.1 83.7 20.6 1.2 344 1 5.8 20.3 20.0 17.8 17.0 ND ND ND ND 75.1 12.0 0.7 San Onofre State 55 Beach (U 1 West) 15.8 18.6 18.3 1 8.3 18.6 ND ND ND ND 73.8 10.7 0.4 ISFSl-0 7 c 56 San Onofre State 15.8 15.4 1 7.6 1 5.1 1 7.2 ND ND ND ND 65.3 ND ND Beach (U 1 West) 57 San Onofre State 15.8 Beach (Un i t 2) 16.7 17.7 1 6.6 1 6.9 ND ND ND ND 67.9 ND ND Notes: a. IS F SI TLDs are placed around the ISFSI pad , and not in locat i ons access i ble t o the general publ i c. b. Publ i c dose i s based on the ind i vidual location occupancy as specified i n SDS-RP1-PCD-100

7. c. Stat i on i ncludes neutron dose , es ti ma t ed u sing a neutron s i gnal (R n) co nv e r s i on fac t o r o f 1 0.5*R ,Jr e m (HPSTID 08-015) d. 1.05 1 m rem/mR from ANSI N 13.3 7-2 01 4 , S e c ti o n 3.2.1 e. T h es e TLDs are publ i cl y ac ce s si ble. Page 1104 APPENDIX I Figure 6-2 ISFSI TL D S a nd S<e l e ctecl REMP T L D e n ear t he ISFSI Foundat i o n + 1 SFS 1 , Vea ..t. I S F S I. N o T LD , Yes --Seawa ll lF e n~l ine --M ajo r R oad::i -Railroad 1W O l UU -=-c::,-====

Hi ~--->>ISMOV~11.._,..,., """'~~~t;I °"" 71ir.ut4 lllarocl.uldlltil_,,....,.._.._,l:N TN:WM U:Cl!l 11 ... a .T""""9, 9'9' ._. il f~t ...... ... ,.u. dlllpk:tad ..... " -pilnw f'II , .... m:a.nty , 111d .. #Wlilff'#l ,...,.,_liW.M,w..,.,_.N.Ja, nll,i* n.air la dO t tJid Iii I t. &'Ill& ,.,.,. a::U aJ I .,j t, lh* Pf'CIIJW .,doc.Ult,.. Ot*Olffilll ,....,"w.KIJ .. .., ... c a-..'"---~ .. d~rae.ci m. I Indicates historical TLD locations that are no longer used F i gure 13 -SONGS ISFSI and Selected REMP TLD Loca t ions 2017 AREOR :33 33 4 7 9 3 4 4 4 317 42 31B $7 319 3 4 4 4 3 4 4 33 4 4 4 Page 1105 APPENDIX I .:: .. CT 30 25 20 .,; 15 t; ..... a:: E 10 5 0 ISFSI and REMP TLDs -DR 31 (Control) -DR 321 (ISFSI) -DR 56 (EAB) -DR 318 (ISFSI) DR 55 (EAB) -DR 59 (EAB) 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Figure 14 -ISFSI and REMP TLDs 2017 AREOR Page 1106

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~ APPENDIX J 20 1 7 AREOR APPENDIX J. OFFSITE GROUND WATER SAMPLING Page I 107 APPENDIX J 2017 AREOR Offsite Drinking Water Data All investigations have shown that there are no drinking water pathways at SONGS. Figure 15 below illustrates groundwater well locations along with the flow of the groundwater.

The operation of SONGS had no impact on drinking water wells in the vicinity of SONGS. SONGS Drinking Water Walls I S.c-to.rH w S.Cto r P WNW helot M WSW SktOf'l: SW Figure 15 -Closest Drinking Water Wells ... Page 1108 Glossary a posteriori a priori ALARA Cosmogenic nuclides After the fact Before the fact 2017 AREOR As Low As is Reasonably Achievable means making every reasonable effort to maintain exposures to radiation as far below the dose limits in this part as is practical consistent with the purpose for which the licensed activity is undertaken, taking into account the state of technology, the economics of improvements in relation to state of technology, the economics of improvements in relation to benefits to the public health and safety, and other societal and socioeconomic considerations, and in relation to utilization of nuclear energy and licensed materials in the public interest. Radionuclides (or isotopes) created when a high-energy cosmic ray interacts with the nucleus of an atom. These isotopes are produced within Earth materials such as rocks or soil, in Earth's atmosphere, and in extraterrestrial items such as meteorites. Radioactive isotopes beryllium-? and beryllium-10 fall into this series of three light elements (lithium, beryllium, boron) formed mostly[citation needed] by cosmic ray spallation nucleosynthesis , both of these nuclides have half-lives too short for them to have been formed before the formation of the Solar System , and thus they cannot be primordial nuclides. Since the cosmic ray spallation route is the only possible source of beryllium-? and beryllium-10 occurrence naturally in the environment, they are therefore cosmogenic. Below is a list of radioisotopes formed by the action of cosmic rays in the atmosphere; the list also contains the production mode of the isotope. Isotope Mode of formation 3 H (tritium) 14 N (n, 12C)3H 7 Be Spallation (N and 0) 10 Be Spallation (N and 0) 11c Spallation (N and 0) 14 c 14N (n, p) 14 c 1aF 18 0 (p, n)18 F and Spallation (Ar) 22 Na Spallation (Ar) 24Na Spallation (Ar) 2a Mg Spallation (Ar) 31 Si Spallation (Ar) 32 Si Spallation (Ar) 32 p Spallation (Ar) 34m c1 Spallation (Ar) 35 S Spallation (Ar) 36 CI 35 CI (n, y)36 CI 37 Ar 37 CI (p, n)37 Ar 3a CI Spallation (Ar) Page I 109 Decay Series Distinguishable from background Dose fCi/m 3 Half-life Gamma Spectroscopy 2017 AREOR 39 Ar 38 Ar (n , y)39 Ar ,_ ---39 CI 4 0 Ar (n , np)39 CI & spallation (Ar) ,_ --41 Ar 40 Ar (n , y)41 Ar ...._ a1 Kr 8°Kr (n , y) 81 Kr There are three naturally occurr i ng decay ser i es of heavy elements that transform into a series of various radioactive elements by releasing energy in the form of particles , (such as alpha or beta), and/or gamma rays to end in a stable form of non-radioactive Lead. All three decay series start with extremely long lived radioactive, heavy elements that can be measured in geologic time units. They are Uranium-238 with an approximate half-life of 4.5 billion years, Uranium -235 with a half-life of about 700 million years , and Thorium-232 with a half-life of 14 billion years. All three series contain some more well-known radioactive species , Radium and Radon. Detectable concentration of a radionuclide that is statistically different from the background concentration of that radionuclide in the vicinity of the site or , in the case of structures , in similar materials using adequate measurement technology , survey , and statistical techniques. The amount of radiation that is absorbed by a person's body. In the radiation field the term dose is sometimes used interchangeably with dose equivalent, which i s defined as the rem and described below. acronym for a femto-curie per cubic meter, wh i ch is a concentration unit that defines how much radioactivity is present in a particular air volume , such as a cubic meter. A curie , named after its discoverers Pierre and Marie Curie, is defined as the rate at which a radioactive element transforms itself into another element that is most often another radioactive element. It is mathematically equiva l ent to 37 billion disintegrations or transformations per second. A " femto" is a scientific prefix for an exponential term that is equivalent to one quadrillionth (1/1,000 , 000 , 000,000,000). A measure of how fast half the mass of a radioactive element will transform itself into another element. Each radioactive element has its own unique rate of transformation. Consequently , if a radioactive element , such as lodine-131 has a half-life of 8 days, then in 8 days half of the original amount of lodine-131 will be gone; in another 8 days half of that half will be left and so on. A scientific method used to analyze gamma rays emanating from radioactive elements. The analytical system determines the gamma ray energy which acts as a " fingerprint" for specific radioactive materials. For example , Potassium-40 (K-40) has a very , distinctive gamma energy at 1460 keV. This uniqueness allows the instrument to positively identify the K-40 1460 energy as its own unique fingerprint. A keV is an abbreviation for kilo electron volt, which is a measure of energy at the atomic level. A kilo is a scientific prefix for the multiplier 1 , 000. Page 1110 Gross Beta Liquid Scintillation Millirem (mrem) milliRoentgen (mR) pCi/kg pCi/L Rem Roentgen Skyshine Thermolu minescent Dosimete r s (TLD) 2017 AREOR A simple screening technique employed to measure the total number of beta particles emanating from a potentially radioactive sample , with higher values usually indicating that the sample contains natural and/or made radioactive elements. High values would prompt further analyses to identify the radioactive species. A beta is a negatively charged particle that is emitted from the nucleus of an atom with a mass equal to that of an orbiting electron. An analytical technique by which Tritium and many other radioactive contaminants in water are measured. A sample is placed in a special glass vial that already contains a special scintillation cocktail. The vial is sealed and the container vigorously shaken to create a homogeneous mix. When the tritium transforms or decays it emits a very low energy beta particle. The beta interacts with the scintillating medium and produces a light pulse that is counted by the instrument. Although a different scintillation cocktail is used , this is basically how radon in well water is measured. one thousandth (1/1000) of a rem. one thousandth (1/1000) of a Roentgen an acronym for a pico-curie per kilogram , which is a concentration unit that defines how much radioactivity is present in a unit mass , such as a kilogram. A " pico" is a scientific prefix for an exponential term that is equivalent to one trillionth (1/1 , 000 , 000,000 , 000). an acronym for a pico-curie per liter, which is a concentration unit that defines how much radioactivity is present in a unit volume , such as a liter. an acronym for roentgen equivalent man. It is a convent i onal unit of dose equivalent that is based on how much of the radiation energy is absorbed by the body multiplied by a quality factor , which is a measure of the relative hazard of energy transfer by different particles , (alpha , beta, neutrons , protons, etc.), gamma rays or x-rays. In comparison the average natural background radiation dose equivalent to the United States population is estimated to be 292 millirems per year , or 0.8 millirem per day, with 68 % of that dose coming from radon. A millirem is one thousandth, (1/1000), of a rem. a special unit of exposure named after the discoverer of X-Rays , Wilhelm Roentgen. It is a measure of how much ionization is produced in the air when it is bombarded with X-Rays or Gamma Rays. Ionization is described as the removal of an orbital electron from an atom. is radiation from a radioactive source that bounces off air molecules in the sky, much like a cue ball does off the banking of a billiard table , and is scattered/redirected back down to the earth. very small plastic-like phosphors or crystals that are placed in a small plastic cage and mounted on trees , posts , etc. to absorb any radiation that impinges on the material. Special readers are then used to heat the plastic to release the energy that was stored when the radiation was absorbed by the plastic. The energy released is in the form of invisible light and that light is counted by the TLD reader. The intensity of the light emitted from the crystals is directly proportional to the amount of radiation that the TLD Page 1111 Site Area Boundary (SAB) Tritium (Hydrogen-3 or H-3) 2017 AREOR phosphor was exposed t o. SONGS SAB is defined as that line beyond which the land is not owned, leased , or otherwise controlled by the licensee; from ODCM definition. a special name given to the radioactive form of Hydrogen usually found in nature. All radioactive elements are represented as a combination of their chemical symbol and their mass number. Therefore , Tritium, which is a heavy form of the Hydrogen molecule with one proton and two neutrons i n the nucleus of its atom , i s abbreviated and represented by its chemical symbol , H , for Hydrogen and 3 for the number of particles in its nucleus , or mass number. Similarly , other radioactive elements , such as Potassium-40 , can be represented and abbreviated as K-40 , and so on Page 1112}}