ML18059A826

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Effluent Monitoring and Environmental Surveillance Programs, Annual Report for 2017
ML18059A826
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Site: 07000754
Issue date: 02/28/2018
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GE Hitachi Nuclear Energy
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Office of Nuclear Material Safety and Safeguards
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{{#Wiki_filter:* HITACHI GE Hrtachr Nuclear Energy. LLC EFFLUENT MONITORING AND ENVIRONMENTAL SURVEILLANCE PROGRAMS ANNUAL REPORT 2017

NOTICE AND DISCLAIMER The GE-Hitachi Nuclear Energy, LLC (GEH) prepared this document. GEH and contributors to this document do not: make any warranty or representation, expressed or implied, that the use of any information disclosed may not infringe privately owned rights; or assume responsibility for liability or damage of any kind, which may result from the use of any information disclosed.

TABLE OF CONTENTS TABLE OF CONTENTS.................................................................................................................................................................................................. ii LIST OF FIGURES AND TABLES............................................................... .................................................................................................. iii ABSTRACT......................................................................................................................................................................................................................... iv

1.0 INTRODUCTION

................................................................................................................................ 1 1.1 1.2 Effluent Monitoring Program Environmental Surveillance Program 2.0 EFFLUENT MONITORING DATA....................................................................... Effluent Data 1 2 ......................................................................... 4 4 3.0 ENVIRONMENTAL SURVEILLANCE DATA............................................................................................................................................. 5 3.1 3.2 3.3 3.4 3.5 3.6 Groundwater Stream Bottom Sediments Vegetation Gamma Monitoring Ambient Air Monitoring Gaseous Effluent Monitoring 4.0 METEOROLOGY................................................................................................................. 4.1 Rainfall Dota 5 5 5 5 5 5 ..................................................................... 6 6 5.0 DEFICIENCIES............................................................................................ ................................................................................................. 7 5.1 5.2 5.3 5.4 December N03 Wastewater Effluent Exceedance Year of 2017 Missed DO Measurements Annual Environmental Gamma Monitoring Observation Weii102A High Gross Beta Count 7 7 7 7 6.0

SUMMARY

.............................................................................................................................................................................................................. 8

LIST OF FIGURES AND TABLES Figure No. Table No. 1 Topographic Mop Of VNC 2 Sanitary And Industrial Discharge Treatment Facility 3 Water Sampling Locations 4 Air Sampling Locations And Gamma Monitoring Points 5 Analytical Results. Air Samples 6 Analytical Results, Stock Monitoring (Stock 4, Bldg. 102) 7 Analytical Results, Stock Monitoring (Stock 16, NTR) 8 Analytical Results, Stock Monitoring Composite (All Except Stocks 4 And 16) 1 Sample Collection Schedule 2 Groundwater Well Information 3 Stock Specifications 4 Effluent Volumes 5 Dissolved Oxygen 6 Wastewater pH Samples 7 Fecal Coliform 8 Total Dissolved Solids 9 Nitrates (as N03) 10 Radiological Effluent Samples 11 Radiological Ground Water Samples 12 Radiological Stream Bottom Sediment Samples 13 Radiological Vegetation Samples 14 Dosimetry Results-Gamma Monitoring 15 Radiological Ambient Air Monitoring 16 Rainfall Data iii

ABSTRACT Annual, 2017 This report presents the data collected for the calendar year of 2017. The original copies of laboratory reports ore on file at VNC. Treated sanitary and industrial wastewater was disposed of on-site by on irrigation system. No surface runoff of sanitary or industrial wastes was observed during the report period. Based on the analytical results of non-radiological samples collected from locations on-site during the reporting period, VNC was out of compliance with the limitations set in the Water Discharge Permit No. GE-R2-2008-0079 issued by the California Regional Water Quality Control Boord, Son Francisco Boy Region. Based on the analytical results of radiological samples collected from locations on-and off-site during the reporting period, VNC was in compliance with licenses issued by the U.S. Nuclear Regulatory Commission and California Deportment of Health, Radiologic Health Branch. iv

1.0 INTRODUCTION

This report summarizes activities performed and data collected for the Effluent Monitoring and Environmental Surveillance Programs at Vallecitos Nuclear Center (VNC). This section presents background information about the Programs. Data collected during the reporting period ore presented in Section 4.0. This report has been prepared in compliance with Waste Water Permit requirements. The VNC site is several hundred acres in size. It is located on the northern side of Vallecitos Volley as shown in Figure 1, o topographic mop of VNC and the surrounding area. The majority of the site is undeveloped with hills ranging in elevation from approximately 1.000 to 1,300 feet above mean sea level. Approximately 135 acres in the southwest corner and situated between the 400- and 600-foot topographic contours ore developed. The ground surface of this portion of the site slopes to the southwest. VNC utilizes three drainage systems: industrial, sanitary, and storm. The industrial and sanitary systems discharge effluent into one of four 50,000-gollon retention basins located in the southwest corner of the site (Figure 2l. The storm drainage system, essentially natural ditches, discharges storm water into a ditch parallel with Vallecitos Rood (State Route 84). Storm drains from Buildings 103, 104 and 106 discharge to the west drainage ditch, while some storm drains in the Building 102, 105, 200 and 300 areas discharge to the east drainage ditch. As shown in Figures 2 and 3, these ditches merge prior to exiting the site. Groundwater levels of the developed site vary from 2 to 3 feet below ground surface (during winter near Retention Basins 2 and 3) to 30 to 40 feet (during the summer northwest of the rood leading to the water tonk). A USGS geology study shows that groundwater generally flows toward the southwest. The velocity of groundwater is estimated by USGS to be about 0.01 ft/doy in cloys to 8 ft/doy in grovels. In areas where grovels with o considerable mixture of cloy (most of developed site) ore saturated close to the land surface. southwesterly movement would occur at on overage rote of approximately 2 ft/doy 1. 1.1 Effluent Monitoring Program The purpose of the Effluent Monitoring Program is to ensure that VNC site release limits for effluent ore not exceeded. The Program includes measuring radioactive and non-radioactive constituents in water discharged through the site sanitary and industrial wastewater systems. Measurements ore determined by collecting samples of effluent. The schedule of sample collection is presented in Table 1. The California Regional Water Quality Control Boord (CRWQCB) has established release limits for numerous non-radiological constituents through Water Discharge Permit No. R2-2008-0079. A copy of the 2008 permit is on file at VNC and CRWQCB. The California State Deportment of Health Services (CSDHS) and the United States Nuclear Regulatory Commission (NRC) hove established radiological release limits. These limits ore listed in 10CFR20, Appendix B. Effluent Characteristics Effluent discharge from VNC is mode up of industrial wastewater and clean water. Discharges of industrial wastewater consist primarily of non-contact cooling water. The discharges ore either held in one of three available 50,000-gollon retention basins or used for non-potable purposes, such as landscape watering. After July 151, 2003 no discharges to surface waters hove been mode from these sources. Samples ore collected from each basin prior to discharge to on site irrigation. In addition, samples from all basin d ischorges ore accumulated and analyzed at specified intervals foro variety of constituents. Discharges of clean water consist of storm water runoff and small quantities of water known to contain no contaminants (such as irrigation runoff). These waters flow directly to drainage ditches that enter Vallecitos Creek. Sanitary Waste Handling Sanitary waste (sludge) is collected in an Imhoff tank before undergoing sand filtration and chlorination (by addition of sodium hypochlorite solution). Samples of sanitary waste (sludge) ore collected before each Imhoff 1 A delay of over 2 years from the nearest postulated spill point to the site boundary. 1

Tank clean-out. There were no clean-outs performed on the Imhoff tank during 2017. Processed sanitary waste water is sprayed onto VNC property by an irrigation system in a designated area (Figure 2). The procedure is monitored so that no surface runoff occurs. 1.2 Environmental Surveillance Program The purpose of the Environmental Surveillance Program is to determine if discharges from VNC are detectable in the environment. The Program includes measuring both radioactive and non-radioactive constituents in neighboring streams, wells, and soils at locations near or beyond the site perimeter. Samples of groundwater, stream bottom sediments. and vegetation are collected. The schedule of sample collection is presented in Table 1. Groundwater Monitoring Groundwater is monitored by collecting and analyzing samples from ten wells located on or near VNC. Samples are analyzed for State water permit effluent parameters as well as radiological contaminants. Well identification numbers, corresponding California State Well Numbers. and descriptions of locations are listed in Table 2. It should be noted that the wells installed in the early 1970s in and around Building 102 are checked on a quarterly basis for water. Some of these wells have been dry for several years and sampling is not possible. When samples are collected from these sources, they are sent to the counting lab on site for analysis. Vegetation Monitoring Vegetation is monitored by collecting and analyzing samples of vegetation at two locations designated V-2 and Val-IV. The locations are shown in Figure 3. Stream Bottom Sediment Monitoring Stream bottom sediment is monitored by collecting and analyzing samples at one location designated as S-4. The location is at the outfall of the retention basins at south boundary of site, which is shown in Figure 3. Air Monitoring There are four air monitoring stations, designated as A-1 through A-4, across the site. The stations are positioned approximately 90° apart around the operating facilities of the site. The locations of the stations are shown in Figure 4. To collect samples, each station is equipped with a membrane filter and an activated charcoal cartridge. The filter is changed weeklyz and counted for gross alpha and gross beta-gamma radiation. The cartridge is removed and analyzed only in the event of a suspected radioactive iodine release. Gamma Monitoring There are 20 monitoring stations on site for measuring gamma radiation in the environment. Each station is constructed of a steel mailbox and equipped with a dosimeter. The dosimeter is sealed in plastic. The dosimeters are exchanged annually. The locations of the stations are shown in Figure 4. For reporting purposes, the dosimeters are distributed as follows: South Boundary-Stations 1, 2, 3 East Boundary-Stations 4,5,6 North Boundary - Stations 7,12,13 West Boundary-Stations 8,9,10,11 Background Dosimeters -Stations 14,15,16,17,18,19,20 The dosimeter vendor reports the measurements of each dosimeter and determines the background measurement. Background is determined by using a dosimeter that has been exposed to background radiation at this facility and is from the same batch of OSL material as the dosimeters exposed at VNC. z During dusty conditions, the filters are changed as determined by the RMT, Facilities Protection. 2

Gaseous Effluent Monitoring Several operations at the site utilize exhaust stacks. Air is collected from single or multiple operating areas via a ventilation system. The ventilation system is generally comprised of ductwork. particulate filtration systems. blowers. and an exhaust stack. The gaseous effluent is monitored. The specifications of each stack are listed in Table 3. The various site operating licenses (SNM-960, R-33, and State 0017-01) and federal regulations require that the gaseous effluents released to unrestricted areas be limited and controlled to maintain the concentrations of radioactive material in the unrestricted area as low as reasonably achievable but at least no greater than the values in Appendix B, Table II of 10CFR20. The method by which releases are determined to be within these limits is to establish average release limits and control values for each stack and then measure the average releases through monitoring and/or sampling of the effluents. The control values ore, in general, established as 10% of the license release limits. Both sampling and monitoring techniques are used to determine gaseous effluent releases. Release results reported to regulatory agencies for particulates and halogens are obtained from sampling systems. Noble gas results are obtained from charts or electronic integrators on monitoring equipment The COMPLY computer code is run to determine the dose at the site boundary from annual airborne effluents. This evaluation was formerly required when 40CFR61 Subpart I applied to NRC licensees, which included VNC. The regulation was amended to exclude NRC licensees. However. VNC has continued to run the COMPLY code to demonstrate compliance with the constraint rule per Regulatory Guide 4.20 and 10CFR20.1101d. Verifying compliance with annual public dose per 10CFR20.1301, "Dose limits for individual members of the Public'. 1.3 Laboratory Analyses On-site and external laboratories perform the analyses of samples collected at VNC as required for the programs. Samples analyzed by the on-site laboratory are reported as measured value or less than minimum detectable activity (MDA) values. while samples analyzed by the external laboratories ore reported as actual measured values. Values within the statistical bac(<ground may be listed as zero or as a positive or negative numbers. All analyses are performed using approved USEPA methodology with minimum sensitivities equal to or less than permit limits. All records of analytical results are maintained at VNC. On-site Laboratory Analyses The following list of analyses are performed by the on-site laboratory: pH Dissolved Oxygen Temperature Conductivity Total Alpha-Emitting Radioactivity Total Beta-Gamma-Emitting Radioactivity Off-site Laboratory Analyses The three external State-certified laboratories that have been contracted to analyze samples collected for the program are TestAmerica Laboratories. Inc., Alpha Analytical Laboratories. Inc. and Dovi Lab. Alpha Labs, located in Livermore, California, performs Total Ammonia (as Nl. Nitrates (as N03) Total Dissolved Solids, total coliform. and analyses of water samples as required. Test America. located in Pleasanton, California. performs identical analysis and services to Alpha Labs. Davi Lab. located in Hercules. California. performs most radiological analyses on samples of water. stream bottom and vegetation. 3

2.0 EFFLUENT MONITORING DATA This section presents the discharge information and analytical results for samples collected for the Effluent Monitoring Program during the reporting period. Effluent Data Compliance Summary Required samples were collected during the reporting period and the analytical results of tests did exceed Permit limits. During the months of January to November, no exceedances were identified. For the month of December, a review of monthly discharge volumes identified a Nitrate (as N03) exceedance for waste water. Treated sanitary and industrial wastewater was disposed of on-site by an irrigation system. No surface runoff of sanitary or industrial wastes was observed during the report period. Based on the analytical results of non-radiological samples collected from locations on-site during the reporting period, VNC was in compliance with the limitations set in the Waste Water Permit No. GE-RZ-2008-0079. Based on the analytical results of radiological samples collected from locations on and off-site during the reporting period, VNC was in compliance with all licenses issued by the U.S. Nuclear Regulatory Commission and California Department of Health, Radiologic Health Branch. Discharge Volume Data Industrial and sanitary wastewater discharge volumes are summarized in Table 4. Non-radiological Analytical Results Summaries of data relating to non-radioactive effluent parameters are given in Table 5 through 9. The results indicate that for the month of December, Nitrate (as N03) was released greater than permit limit. No other constituents were released equal to or greater than regulatory limits for any other time during 2017. Radiological Analytical Results Radioactivity measurements for effluent waters are summarized in Table 10. The data are derived by summing data obtained from measurements of short-interval (daily) water releases. Many of these measurements were less than the detection limits of the laboratory's measurement methods. The data listed as "less than" numbers necessarily include the summation of these detection limits (i.e., a summation of "less than" numbers) and represent maximum possible values for the sample analyses. The results indicate that no radiological material was released equal to or greater than regulatory limits. 4

3.0 ENVIRONMENTAL SURVEILLANCE DATA This section presents the analytical results for samples of ground water, stream bottom sediments, and vegetation collected for the Environmental Surveillance Program during the reporting period. 3.1 Groundwater Analytical results of groundwater samples collected from the designated wells during the reporting period are listed in Table 11. 3.2 Stream Bottom Sediments Analytical results of stream bottom sediment samples collected during the reporting period are listed in Table

12.

3.3 Vegetation Analytical results of vegetation samples collected during the reporting period are listed in Table 13. 3.4 Gamma Monitoring The results of gamma monitoring during the reporting period are listed in Table 14. 3.5 Ambient Air Monitoring Analytical results of environmental air samples collected during the reporting period are graphically presented in Figure 5, data in Table 15. 3.6 Gaseous Effluent Monitoring Stack Monitoring Analytical results of gaseous effluent samples collected for stack monitoring during the reporting period are graphically presented in Figures 6 through 8. Effective Dose Equivalent The calculated Effective Dose Equivalent at Screening Level 2 resulting from the annual measured releases. as calculated by the Comply Code, are: Property Line 0.8 mRem/year due to all emissions, and 4.6E-04 mRem/year from iodine. Industrial Area Boundary 5.1 mRem/yeor due to all emissions, and 3.0E-03 mRem/yeor from iodine. These numbers are less than the EPA emission standards3 of 10 mRem/year total dose and 3 mRem/year due to iodine. 3 Established in 40CFR61.102 5

4.0 METEOROLOGY This section presents meteorological data collected during the reporting period. Meteorological data are collected using a weather station manufactured by Davis Instruments of Hayward, California. The station is located on a knoll southeast of the main site area. A portion of the meteorological data collection system is computerized. Software provided by the manufacturer is used to build a database of meteorological data, specifically the amount of rainfall over time. 4.1 Rainfall Data Rainfall data collected at VNC since January 2002 are presented in Table 16. 6

5.0 DEFICIENCIES This section presents anomalies. deficiencies or deviation in adherence to the Effluent Monitoring and Environmental Surveillance Programs at VNC for the reporting period. 5.1 December N03 Wastewater Effluent Exceedance In January of 2018. review of preceding month's wastewater discharges found that limit for nitrates (as N03) was exceeded. Per California State Order No. R2-2008-0079, the SF Bay RWQCB was contacted by telephone and notified of the event. A Corrective Action Report (CR) was created to track the conditions that caused the event and associated remedial actions to closure. Condition Report #27586. 5.2 Veer of 2017 Missed DO Measurements In January of 2018. review of previous year's discharge logs identified missing DO measurements for the months of March 2017 and December of 2017. All affected employees were coached on performing DO measurements, and one instance of retraining was performed on usage of the DO meter and data logging process. DO measurements for 2017 are in Table 5 of this report. A calendar item to review discharge logs on a biweekly basis was created as a preventative action, see Action #5, Condition Report #27586. 5.3 Annual Environmental Gamma Monitoring Observation In January of 2018. it was observed that one of the annual environmental dosimetry badges had been changed in October of 2017 instead of December of 2017. The employee responsible for the change out was coached on proper practice. and a CR created to track the condition to trend. Condition Report #27665. Gamma monitoring measurements for 2017 are in Table 14 of this report. 5.4 Weii102A Elevated Gross Beta Count In the generation of this report, it was observed that the third quarter. 2017 Gross Beta count for Weii102A showed an elevated value. 90.10 pCi/ml. The well was dry during the following fourth quarter sampling. A condition report was generated to investigate the well result. Condition Report #28006. Quarterly ground water radiological monitoring results for 2017 are in Table 11 of this report. 7

6.0

SUMMARY

This section presents a summary of the results of the water Monitoring Program for the reporting period. The analytical results of non-radiological samples collected during the reporting period indicate that effluent discharges were within Waste Water Permit limits during months of January to November, and exceeded the limit for Nitrate los N03) during the month of December. The analytical results of radiological samples collected during the reporting period indicate that effluent discharges from VNC were in compliance with Water Permit limits and airborne releases were in compliance with licenses issued by the U.S. Nuclear Regulatory Commission. Additionally, neither surface runoff of processed sanitary wastewater. nor industrial wastewater was observed. The Effluent Monitoring and Environmental Surveillance Programs continue to be effective. 8

TABLE 1. SAMPLE COLLECTION SCHEDULE Designation Constituent Sample Type Frequency Location E-001 and E-002 Gross Alpha Grab As Released From Basin 1-4 Gross Beta/Gamma Grab As Released Gross Alpha Composite Monthly Gross Beta/Gamma Composite Monthly E-001 Flow<l} Measurement Each discharge Basin 1 Total Coliform<2J Grab Monthly PH Grab Each discharge Dissolved Oxygen Grab Monthly Total Dissolved Solids Grab Monthly Nitrate (as N03) Grab Monthly Ammonia as N Grab Monthly Standard observations Grab Each discharge E-002-L Flow Measurement Each discharge Basin 2, 3 or 4 PH Grab Each discharge Total Dissolved Solids Grab Monthly Nitrate (as N03) Grab Monthly Standard observations Grab Each Station E-003 Flow Measurement Each occurrence Storm Water PH Grab Each occurrence Oil & Grease Grab Twice each half of reporting year Total Suspended Solids Grab Twice each half of reporting year Gross Alpha Grab Twice each half of reporting year Gross Beta/Gamma Grab Twice each half of reporting year Standard observations Grab Each occurence S-4 Gross Alpha Grab Annually, usually First week in May Stream Bottom Gross Beta/Gamma Grab Annually, usually First week in May Sediments-Co-60, Cs-137 V-2 & VAL IV Gross Alpha Grab Annually, usually First week in April Vegetation Gross Beta/Gamma Grab Annually, usually First week in April 9

FOOTNOTES FOR TABLE 1 [1] Flow Monitoring: The volume of each basin discharge shall be recorded. The following information shall also be recorded when discharged for the quarterly report: Average Daily Flow (mgd) Maximum Daily Flow (mgd) Minimum Daily Flow (mgd) [2] Samples are required for each constituent twice during each half of reporting year in accordance with Part XI Section B.2 of the storm water permit. For safety reasons, the Discharger may choose to sample only storms occurring during daylight hours. The Discharger shall collect grab samples during the first four hours of discharge or start of facility operations if a Qualifying Storm Event (QSE) occurs within previous 12-hour period, unless it can explain why this was not possible. The Discharger shall also conduct visual observations at least monthly during each reporting year. 10

TABLE 2-GROUNDWATER WELL INFORMATION Site Well No. California State Well No. Location Description GN 4S/1E-2N1 Southeast of Building 105 GA 4S/1E-10A1 southwest of Building 102 0.6 miles southwest of site entrance on GP 4S/1E-10P3 private property MW-1 4S/1E3R2 Bldg. 102 Parking Lot MW-2 4S/1E-10A2 North Side of Sanitary Discharge Field MW-3 4S/1E-10A3 West side of Sanitary Discharge Field MW-4 4S/1E-10A4 South Side of Sanitary Discharge Field MW-5 4S/1E-10H2 West side of Industrial Discharge Field MW-6 4S/1E-10H3 South side of Industrial Discharge Field MW-7 4S/1E-10G3 Southwest from Basins 102A N/A Bldg. 102 Pool Area 102E N/A Bldg. 102 A by the Stairs 102G N/A Bldg. 102 Equipment Storage Area 102K N/A Bldg. 102 Yard I Cask Storage Areal B-2 N/A Well located at the GETR control room 11

TABLE 3-STACK SPECIFICATIONS Flow Stack Height Diameter Rate Number Location Components Serviced (feet agsl (inches) (cfm) 4 Bldg. 102A Remote Handling Operation. 75 66 34,531.2 Isotope Production Facility, Radiochemistry, Remote Handling Operations Radioactive Materials Storage Room 12 Bldg. 103 Metallurgy and Ceramics 48 60 31,352.8 Laboratories. Chemistry Laboratories 16 Bldg. 105 Nuclear Test Reactor 45 13.5x13.5 1.428.2 26 Area 200 General Electric Test Reactor 29 19 4,506.8 (GETR) 30 Waste Liquid Waste Evaporator 25 13x17.75 3,202.7 Evaporator 34 Waste Waste Storage Facility 25 13x17.75 1.969.5 Storage (Sandblast Room) 37 HSF Bunker Bunker Area of Hillside Storage 40 35 21,145.4 Facilit Notes: ags - above ground surface cfm -cubic feet per minute For stack 26, value listed is from 2016; stack did not operate during 2017. 12

Month January February March April May June July August September October November December Annual Totals: Sanitary Discharge Volumes Monthly Total 360,000 325,000 105,000 80,000 0 45,000 0 0 0 0 0 10,000 925,000 I Doily Averoqe 11.613 11,607 3,387 2,667 0 1,500 0 0 0 0 0 323 2,591 TABLE 4-EFFLUENT VOLUMES (gallons) Industrial Discharge Volumes Monthly Total 790,000 1,180,000 775,000 535,000 470,000 500,000 100,000 100,000 150,000 100,000 40,000 50,000 4,790,000 13 I Doily Averooe 25,484 42,143 25,000 17,833 15.161 16,667 3,226 3,226 5,000 3,226 1,333 1.613 13,326 Sanitary & Industrial Total Dischorqes On-site lrriqotion Monthly I Doily Total Averoqe 1.150,000 1.505,000 880,000 615,000 470,000 545,000 100,000 100,000 150,000 100,000 40,000 60,000 5,715,000 37,097 53,750 28,387 20,500 15,161 18,167 3,226 3,226 5,000 3,226 1.333 1,936 15,917

Footnotes for Table 5: TABLE 5-DISSOLVED OXYGEN (E-001 [Sanitary] Parameter requirement is for sample to be >1 mg/1 dissolved oxygen. E-001(Min) Lower Month DO (PPM) Limit (PPM) January 7.7 >1 February 7.8 >1 March2 >1 April 9.8 >1 May1 N/A >1 June 7.6 >1 July1 N/A >1 Augustl N/A >1 Septemberl N/A >1 Octoberl N/A >1 Novemberl N/A >1 December2 >1 [1] There were no sanitary discharges made during months of May, July, August. September, October or November. [2] Dissolved Oxygen measurements were not performed during these periods. DO (for E-001) [ -+-E-001(Min) Lower Limit 12 10 8 6 4 2 0 ~ ~<A 0' i..~ ~~.:;, f::-(l; -:,:f. s-v ~<.. v ~ f:-v ',!:)~ ~~ '?-~ ~ ~ ,_a ~ (/;<$' ':,~ '?-.s ~0 ov ~fQ ev <(fQ 1::>(/;<Q ~0 Q 14 I

Dote Jon Feb Mar Apr May Jun Jul1 Auq Sep1 Oct Nov Dec Footnotes for Table 6: TABLE 6-WASTEWATER pH SAMPLES Parameter requirements <::6 and ~9 pH E-001 E-002-L No. No. Samples pH Max pH Min Samples pH Max 7 7.4 6.7 11 7.5 6 7.5 6.8 20 7.4 2 8.1 6.9 15 7.7 2 7.5 7.3 10 8.5 0 N/A N/A 9 8.5 1 8.6 8.6 9 8.6 0 N/A N/A 2 8.5 0 N/A N/A 2 8.5 0 N/A N/A 3 8.6 0 N/A N/A 3 8.2 0 N/A N/A 3 8.6 1 6.7 6.7 1 8.2 pH Min 7.0 6.8 6.3 7.4 7.7 7.8 8.0 8.5 8.0 7.9 8.2 8.2 (1] There were no sanitary discharges mode during months of May, July, August. September, October or November. E-001 pH 10.0 9.5 9.0 ---- 8.5 --- 7.0 6.5--- 6.0 ---- 5.5 5.0 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec E-002-L pH 10 - 9.5 - ---- 9 - 8.5 ---**-**-m .. -.-----.. -=-.**. *. 8 ******------- 11111 ------- ,,

  • I.......

6: - 1 6 - 5.5 5 - Jan Feb Mar Apr May Jun Jut Aug Sep Oct Nov Dec 15

Footnotes for Table 7: TABLE 7-FECAL COLIFORM (Maintain the limit of two consecutive samples$; 240 mpn/100ml or 7 sample median $; 23 mpn/100ml) (mpn/100ml) Date Sample Median 2-Sample 1/9/2017 <2 2 2 2/1/2017 <2 2 2 3/1/2017 <2 2 2 4/5/2017 <2 2 2 N/Al N/A N/A N/A 6/7/2017 <2 2 2 N/Al N/A N/A N/A N/Al N/A N/A N/A N/Al N/A N/A N/A N/Al N/A N/A N/A N/Al N/A N/A N/A 12/15/2017 <2 2 2 [1) There were no sanitary discharges made during months of May, July, August. September, October or November. Fecal Coliform 1000 ~-----------------------------------------------------------, 100 +---------------------------------------------,=============~ Median limit 2-Sample Limit 10 +-------------------------*---------------------- -------- ---------~ Jan Feb Mar Apr May Jun July July Aug Sep Oct Nov Dec 16

400 ~ 300 E 200 100 0 TABLE 8-TOTAL DISSOLVED SOLIDS-COMBINED LAND DISCHARGE (Parameter::;; 500 mg/1) (Average weighted by volume of E-001 and E-002-L} Average Month TDS (mg/1) Jan-17 454.8 Feb-17 463.0 Mar-17 317.6 Apr-17 416.8 May-17 220.0 Jun-17 320.2 Jul-17 170.0 Aug-17 170.0 Sep-17 170.0 Oct-17 240.0 Nov-17 250.0 Dec-17 391.7 Volume Weighted Average TOS Jan-17 Feb-17 Mar-17 Apr-17 May-17 Jun-17 Jul-17 Aug-17 Sep-17 Oct-17 Nov-17 Oec-17 = Average TDS -- Lirrit 500 ppm 17

~ 30 E 20 10 0 TABLE 9 - NITRATES (as N03)- COMBINED LAND DISCHARGE (Parameter :5 45 mg/L) (Average weighted by volume of E-001 and E-002-L) Average Month N03 (mg/1) Jan-17 36.4 Feb-17 28.9 Mar-17 19.8 Apr-17 8.8 May-17 8.1 Jun-17 44.3 Jul-17 2.1 Aug-17 2.1 Sep-17 1.0 Oct-17 2.0 Nov-17 2.1 Dec-17 54.9 Volume Weighted Average N03 Jan-17 Feb-17 Mar-17 Apr-17 May-17 Jun-17 Jul-17 Aug-17 Sep-17 Oct-17 Nov-17 Dec-17 c::::==::~ .~verage N03 -- Limt 45 ppm 18

Month January February March April Moyl June Julyl August 1 Septemberl October1 Novemberl December TABLE 10- MONTHLY RADIOLOGICAL EFFLUENT SAMPLES, E-001 Action Levels Gross Alpha (3.0x10-B1JCi/cc = 30 pCi/1) Gross Beta (5.0x10-B1JCi/cc =50 pCi/1) Contract Service Data Internal Data Sanitary Monthly Effluent Sanitary Doily Basin Samples (pCi/L) Composite Sample (pCi/L) No. of a a ~-y Tritium Samples Max. Min. Ave. Max. 2.38 7.35 3003 7 <20 <20 <20 <50 5.99 3.23 360 6 <20 <20 <20 <50 5.49 3.68 299 2 <20 <20 <20 <50 0.94 0.48 589 2 <20 <20 <20 <50 N/A N/A N/A 0 <20 <20 <20 <50 1.69 5.59 349 1 <20 <20 <20 <50 N/A N/A N/A 0 <20 <20 <20 <50 N/A N/A N/A 0 <20 <20 <20 <50 N/A N/A N/A 0 <20 <20 <20 <50 N/A N/A N/A 0 <20 <20 <20 <50 N/A N/A N/A 0 <20 <20 <20 <50 3.53 2.68 187 1 <20 <20 <20 <50 Footnotes for Table 10: [1] There were no sanitary discharges mode during months of May, July, August, September, October or November. E-001 Sanitary Basin Composite r------------------------------------------------------------r3500 ~~---------------------------------------------------------{3000

o. -+-13--'1 -

Trttium I 19 ~-y Min. Ave. <50 <50 <50 <50 <50 <50 <50 <50 <50 <50 <50 <50 <50 <50 <50 <50 <50 <50 <50 <50 <50 <50 <50 <50

Month January February March April May June July August September October November December TABLE 10- MONTHLY RADIOLOGICAL EFFLUENT SAMPLES, E-002-L Action Levels Gross Alpha (3.0x10-B IJCi/cc = 30 pCi/1) Gross Beta (5.0x10-S1-JCi/cc =50 pCi/1) Contract Service Data Internal Data Industrial Monthly Effluent Industrial Daily Basin Samples (pCi/L) Composite Sample (pCi/L) No. of a 0-y a 0-y Tritium Samples Max. Min. Ave. Max. Min. 3.03 6.05 407 11 <20 <20 <20 <50 <50 4.69 2.66 153 20 <20 <20 <20 <50 <50 5.27 2.51 223 15 <20 <20 <20 <50 <50 0.34 0.00 134 10 <20 <20 <20 <50 <50 1.18 1.32 304 9 <20 <20 <20 <50 <50 0.74 4.86 784 9 <20 <20 <20 <50 <50 1.85 1.66 0.00 2 <20 <20 <20 <50 <50 1.99 1.89 254 2 <20 <20 <20 <50 <50 3.41 1.28 802 3 <20 <20 <20 <50 <50 2.70 4.45 438 3 <20 <20 <20 <50 <50 0.00 0.00 56 3 <20 <20 <20 <50 <50 1.16 14.38 0.00 1 <20 <20 <20 <50 <50 E-002 Industrial Basin Composite 14 ~---------------------------.--------------~--------------~_,800

~~-------------+--~-----------7~~ 700 2 ~~--~~==~~~~--~~~--~~~~-4~~~~~~~~~---~-+100 0 L---------------~~~----~~--~--------~~------~~~.-~0 20 Ave.

<50 <50 <50 <50 <50 <50 <50 <50 <50 <50 <50 <50

Month February May August December TABLE 11-QUARTERLY RADIOLOGICAL GROUND WATER SAMPLES Action Levels Gross Alpho (3.0xlO-B1JCi/cc = 30 pCi/1) Gross Beto (5.0xl0-81JCi/cc = 50 pCi/1) G'N GA GP (pCi/1) (pCi/1) (pCi/1) Gross Alpha Gross Beta Tritium Gross Alpha Gross Beta Tritium Gross Aloha Gross Beta !.54 0.73 63 7.18 3.74 13 1.79 3.06 6.48 1.53 936 4.34 2.23 517 4.51 1.56 0.00 2.23 494 4.79 1.24 871 2.59 3.52 5.31 1.78 210 6.88 1.91 185 4.42 3.70 Annual A veragc 3.33 I 1.57 I 426 5.80 I 2.28 I 397 3.33 I 2.96 Ground Water Activities I 8_00 1100 7.00

a 6.oo

..9: E 5.oo E ~ 4.00 I (IS ~ 3.00 ~ -a 2.00 1.00 0.00 February May August December aGrossAipha ~;~Gross Beta a Gross Alpha c Gross Beta

  • Gross

.~ l pha c Gross Beta .. Tritium 102A (pCi/1) Month Gross Alpha Gross Beta Tritium February NO 0.89 NA May ND 0.55 NA Augus t 2.61 90.10 NA November NA NA NA Annual Average 2.61 30.5 NJ\\ 102A Bldg. 102 Pool Area 102E Bldg. 102A 102G Bldg. 102 Equipment Storage Area 102K Bldg. 102 Cask Storage Area We II s aroun d Bu1 lnQ 102 102E 102G (pCi/1) (pCi/1) Gross Aloha Gross Beta Tritium Gross Aloha Gross Beta No Water 5.46 10.95 No Water No Water No Water No Water No Water No Water NA NJ\\ NA 5.46 10.95 900 700 500 300 100 -100 Annual Average Tritium Tritium 102K (pCi/1) Tritium Gross Alpha Gross Beta 265 No Water No Water No Water NA NA 265 NA NA TABLE 11-CONTINUED-QUARTERLY RADIOLOGICAL GROUND WATER SAMPLES 21 Tritium 114 546 232 174 267 ~ 0 a. -E

J

~ Tritium 0.00 0

MW -2 (IE-IOA2) ( Ci/1) ( Ci/1) Month Gross Alpha Gross Beta Tritium Gross Alpha Gross Beta Tritium January '17 9.43 3.51 790 4.97 2.57 267 April '17 5.63 2.61 636 3.98 3.35 258 July '17 1.42 1.74 160 6.00 2.24 445 Oct '17 9.24 0.84 0 4.81 0.51 478 Annual Avera e 6.43 2.18 397 4.94 2.1 7 362 MW -4 (IE-I OA 4) ( Ci/1) Gross Alpha Gross Beta Tritium Gross Alpha Gross Beta Tritium 7.71 1.47 338 3.32 6.64 329 6.21 4.94 171 8.06 3.55 32 6.17 2.07 297 8.46 2.92 708 1.20 0.89 191 3.22 2.60 413 5.32 2.34 249 5.77 3.93 371 MW -6 (1E-IOH3) MW-7 (JE-IOG3) ( Ci/1) ( Ci/1) Gross Alpha Gross Beta Tritium Gross Alpha Gross Beta Tritium Gross Alpha Gross Beta Tritium 6.16 5.55 728 7.73 4.03 132 0.70 1.31 553 2.87 3.71 452 1.93 2.41 42 5.56 5.23 720 10.10 1.12 491 4.93 1.51 263 5.58 2.20 445 2.24 2.05 521 1.44 1.24 278 3.87 1.26 0 5.34 3.11 548 4.01 2.30 179 3.93 2.50 430 Ground Water Activities

10.00 1000 iJ 8.00 800

~ 0 E 6.00 600 E E; E 9 4.00 400

J 011

~ <1:1 2.00 200 ..c: c. 0.00 0 ~ January April July October ~ MW-1 Gross Alpha - MW*l Gross B*G tsSSS:SSl MW-2 Gross Alpha - MW-2 Gross 8-G ~ MW-3 Gross Alpha - MW-3 Gross 8-G ~ MW-4 Gross Alpha - MW-4 Gross B-G __._ MW-1 Tritium --+-- M W-2 Tritium .-.-. Mw-3 Tritium _._ MW-4 Tritium 22

~ 12.00 0.3 9.00 (ll E ~ 6.00 C) ell G) 3.00 IC ~ -a 0.00 <i: January Ground Water Activities 1000 800 600 400 200 0 April July October = MW-5 Gross Alpha MW-5 Gross Beta = MW-6 Gross Alpha MW-6 Gross Beta = MW-7 Gross Alpha -MW-7 Gross8eta MW-STntium --+- MW-6 Tritium MW-7Tritium ~ 0 .3 E ~ ~ L_ __________________________________ __ ___ TABLE 12-RADIOLOGICAL STREAM BOTTOM SEDIMENT SAMPLES Sample Date Gross a Gross ~/y Co-60 Cs-137 Number Collected lpCi/gl lpCi/gl (pCi/gl (pCi/gl Action 30 N/A 8 15 Level S-4 5/08/2017 5.00 7.28 0.00 0.00 TABLE 13-RADIOLOGICAL VEGETATION SAMPLES Sample Date Gross a Gross ~/y Number Collected lpCi/g) lpCi/g) Action level 10 50 V-2 3/30/2017

0. 19 2.51 Val-IV 3/30/2017 1.66 3.32 23

TABLE 14-DOSIMETRY RESULTS GAMMA MONITORING 2017 South Boundary East Boundary West Boundary North Boundary Backaround Dosimeters i i i Station No. I _[mRem/yr) Station No. i (mRem/vr) Station No. i (mRem/vr) Station No. ! (mRem/vr) Station No. I (mRem/yr) I 66.9 4 66.5 7 35.9

  • 8 71.3 14 65.8
                      • -------------------*+***---------**---***--*--*** -----*-*-*-***-----*--+-----*-***---------**-*-* ----*---***-*- ----***--***-+***--***-*-*--*-*-*-*-*-*-*-*-- **---*-*--*-*--*--*-- *-**-+-*-*-*-------***-*-****--**- **------*-***--------*--***-+-----------*-*****-*-**-****-

2 64.4 5 63.7 12 i 69.9 9 i 61.6 15 I 66.2

-*-*****-----**t ****- ***-*-*-***-****- ***-*-*-* *-***--***--*-*-****-*------t---*-***--*--*--***-*-***-* ---------**-----------t--*-*****-*-**--***-****-*-+----********---***--*-*****t*****-*- -------*-*****--***-* **--***-*----***--*****-***-t***--------*-*******-*******-

3 1 66.0 6 1 70.2 13 1 78.9 -- --- -- -~-~-- --- -- -L- ----~-~~~ - ----- -- --- -- ~-~------_j* - ----~-~~ -~---- - -- II Notes:

  • Dose> Control Dosimeter See Figure 4 for location, zones demarcated by red lines.

i i i 69.7 17 \\ 74.0

  • -*-***------*****-***--t***-*--**---***-**-----*-*--

18 65.2 ---*-*-***-*-------*--*-***-***-+*-***------***-***-*---*----* I i 19 67.1

*****-----*--*-***-*-*-~-- --*----*-***-*--**---

20 [ i 67.6 The dosimeters at each station were collected on December 6, 2017 Except for Badge# 7 that was collected in error on October 1. 2017. CR # 27665 was generated to document the finding. Gross Values Represented (No background subtracted from control readings). Control Dosimeter reads 85.0 mRem/yr (Control Badge is located in building 102Bl. Missing dosimeters lost due environmental conditions. 24

TABLE 15-RADIOLOGICAL AMBIENT AIR MONITORING Action Levels Beta (3x1Q-1Z) Alpha (lxlQ-14) MONTH STATION ONE STATION TWO STATION THREE STATION FOliR BETA ALPHA BLIA ALPHA BLIA ALPHA BLIA ALPHA JAN 1.34&14 5.25&16 1.76&14 3.50&16 1.02&14 6.78&16 1.79&14 9.61 E-16 FEB 7.25&15 5.05&16 3.36&14 1.01&15 1.13&14 1.05&15 1.05&14 6.81 E-16 MAR 9.64&15 7.98&16 1.63&14 8.83&16 1.28&14 J.26fr l5 1.26&14 8.60&16 APR 1.29&14 2.78&16 1.17&14 4.42&16 2.24&14 9.07&16 1.05&14 4.85&16 MAY 7.35&15 1.11 E-15 1.04&14 8.85&16 7.66&15 7.57&16 1.30&14 6.45&16 JliN 9.46&15 3.14&16 1.01&14 1.05&15 3.14&14 3.37&16 1.19&14 9.12fr16 JliL I. 77&14 4.21&16 1.62&14 1.39&15 1.06fr l5 1.06&15 1.01&14 6.69&16 AUG 1.48E-14 8.55&16 1.28E-14 1.14&15 1.49&14 8.69&16 1.85E-14 2.06&15 SEP 1.71&14 1.61&15 1.75&14 2.45&15 1.39&14 1.53&15 3.60E-14 2.64&15 OCT 2.28&14 3.03&16 2.29&14 1.36&15 2.61&14 1.54E-15 2.58&14 9.98E-16 NOV 1.68&14 6.84&16 1.95&14 1.51 &IS 1.83&14 1.51 E-15 2.21E-14 1.24&15 DEC 5.37&14 3.15&15 4.17E-14 3.22fr15 4.68E-14 4.04E-15 4.92frl4 4.05E-15 AVERAGE 1.69&14 8.80&16 J.92frl4 1.31 &IS 1.81 E-14 J.29fr15 1.98&14 1.35&15 Notes: See Figure 4 for location, zones demarcated by black lines. See Figure 5 for graphical representation 25

TABLE 16-RAINFALL DATA Period Rainfall Amount (Inches) January 2002 to December 2002 14.7 January 2003 to December 2003 15.3 January 2004 to December 2004 15.65 January 2005 to December 2005 26.50 January 2006 to December 2006 20.10 January 2007 to December 2007 11.90 January 2008 to December 2008 12.65 January 2009 to December 2009 13.40 January 2010 to December 2010 21.40 January 2011 to December 2011 14.50 January 2012 to December 2012 20.40 January 2013 to December 2013 4.60 January 2014 to December 2014 18.20 January 2015 to December 2015 12.95 January 2016 to December 2016 27.20 January 2017 to December 2017 24.50 26

1* E ' - ,., _: 1 ower 1 Mile Scale 1:24,000 Figure 1 Topograghic Map of GE Vallecitos Nuclear Center / Countour lnterval10' based on USGS Maps, Lacosta Valley and Livermore, CA

N/~ t

=====Sanitary Pipeline higation Pump and Bas1n ;Itt Strainer Retention Basins Chemical_... Storage Building 0 Pump House Vallecitos Road (state Route 84) Figure 2 Sanitary and Industrial Discharge Treatment Facility

_:~ __.J... _ __,_, ___ l_ ____ ~ ____ L_ __ I __ :,:! ____...J_ _ ___;~......J i J 0 H25001,------ N500 fi\\ "'"'* QF'.Jit:A':~I rdm f~ ~JI. R.l~t.C{ [CJC. ~..,_t.:l S'tr.W If W "f M./.\\1'1::. (!} h~ r A'\\C~'i&* rW~ HY_, W J.. t. l.J'it, ~ fh ~JTv"\\ )' llf4 (,D.U,.J[klM! ( l "'<t.n\\ I DA OOl.. t,.. / t I CJ I g,....

1

~13000 ------4-..X.H t~~-./ /~ Figure 3. Sampling Locations

  • --1-----*+-------

I' I,-- 1' I i" r

.
::-~)-

0 J Uq,.&lf.a~~~l It S:X~Jtf ~rod. <<)fl~ ~((........ ' tl, ()1'1 V-1-t. (1 IJUU4';/ ~ JlJ..L14,UC'I'-1 1)(0)~11~11'~

l----l l l II r~ulJ(t.o11.4.

l} ~..ut,; IC. s:.t~>t

VALLECITOS ROAD (HWY 84 ) Gamma Monitoring Points 1-2 0 Air Sampling Stations Al - A4 FIGURE 4 VALLECITOS NUCLEAR CENTER ENVIRONMENTAL DOSIMETER LOCATIONS

~ '(3

I v.... w 0 x Ambient Air Station 51 o +-~~~~~~hM~~~~~~~

':>~ Ambient Air Station 53 0 ~~~~~~~~~~~~~~ ':>~ ~~ ~¢' 1- ***- *1

§

'(3

I v

.... w 0 Ambient Air Station 52 o +a~~~~~~~~~~~~~ ':l.t Ambient Air Station 54 6 5 4 3 2 0 ':l.t .j?- ~ -t ~ ~" 'S ~ <:::) 0..), ~ Figure 5, Analytical Results, Environmental Air Station Particulates 1- **- **1

J.1Ci 102A ALPHA 0.060 -y-----------------------, 0.050 0.040 0.030 0.020 0.010 0.000 0.025 0.021 0.015 0.018 0.039 0.026 0.014 J.1Ci 2.55 2.05 1.55 1.05 0.55 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 0.05 Limit= 3.6 J.1Ci I Week (14.4 J.1Ci I Month) All results for 1-131 are less than or equal to Minimum Detectable Concentration (MDC) Limit= 73 mCi I Week (292 mCi I Month) 1 02A BET A-GAMMA 1.62 1.32 1.04 0.79 0.85 0.87 0.76 0.80 0.58 0.50 0.44 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Limit= 360 J.1Curies I Week (1,440 J.1Curies I Month) Figure 6. Analytical Results, Stack monitoring (Stack 4, Bldg. 102)

11Ci 105 ALPHA 11Ci 105 BETA-GAMMA 0.005,-----------------------------, 0.20 0.18 0.004 0.16 0.14 0.003 0.003 0.12 0.11 0.002 0.10 0.002 0.002 0.08 0.07 0.001 0.001 0.001 0.001 0.001 0.001 0.06 0.04 0.04 0.04 0.02 0.000 0.00 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Limit = 8.6 11Ci I Week (34.4 11Ci I Month) Limit= 860 11Curies I Week (3,440 11Curies I Month) 11Ci 105 1-131 CURIES 105 NOBLE GAS 20.00 40.00,-----------------------------. 18.00 35.00 16.00 30.00 14.00 12.39 25.00 12.00 20.85 10.00 17.50 17.34 16.86 20.00 19.45 19.67 19.08 15.12 15.60 15.12 8.00 15.00 11.86 6.00 10.46 10.00 4.00 5.00 0.05 2.00 0.00 0.00 0.00 0.93 0.89 1111 nm 0.19 0.19 0.29 0.06 0.10 0.34 - 0.00 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Limit= 170 mCi I Week (680 mCi I Month) Limit= 18 Curies I Week (72 Curies I Month) Figure 7. Analytical results, Stack Monitoring (Stack 16, NTR)

~Ci OTHER ALPHA 0.05 0.04 0.03 0.03 0.02 0.02 0.01 0.01 0.01 0.01 0.01 0.01 Limit= 10.8 ~Ci I Week (43.2 ~Ci I Month) All results for 1-131 are less than or equal to Minimum Detectable Concentration (MDC) Limit= 146 mCi I Week (584 mCi I Month) ~Ci OTHER BET A-GAMMA 0.50 0.45 0.40 0.35 0.30 0.27 0.25 0.24 0.24 0.20 0.18 0.01 0.15 0.12

0. 10 0.10 0.08 0.05 0.00 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Limit= 1,080 ~Curies I Week (4,320 ~Curies I Month)

Figure 8. Analytical Results, Stack Monitoring Composite (All except Stacks 4 and 16)}}

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