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UNLAR-607015 Clow O rfisr am 1nvffn G.0 Suba,vao, Mm,2017 Surrmaryuflhe GSAROD. Public notices are published m the local newspapers announcing the initiation and completion Oldie GSA Five-Year Reviews. DOE/LLNL also meets quarterly with the community action group, Tri-Valley Communities Against Radioactive Environment at Technical Assistance Grant Meetings to discuss remedatiun activities, and cleanup string ss ins and program. All CERCLA documents, including those ' issues,atN with the GSA OU, are submitted to Tri-Valley Communities Against a Radioactive Environment for review. 3. Monitoring Results Regular monitoring of Eastern GSA ground water began in the late Vghws Samples were collected and analyzed from 42 onsite and off the wells, including ground water extraction wells, ground water monitor wells, guard wells, and oRsio active water-supply wells CON and CDFI. After tare Eastern GSA removal action began in 1991, ground water and the treatment system were mainland in accordance with the requirements Of a National Pollutant Discharge Elimination System (NPDES) permit issued by the RWQCB. After the GSA Remedial Design report was issued in 1998, Eamem GSA mound water moniteringwascondneted in accordance with the GSA Compliance Monitoring PlansContinimmy Plan contained as an appendix in the Remedial Design report. Eastern GSA treatment system monitoring continued under the requirements in the NPDES permit. Gmund water and treatment system monitoring results were reported in quarterly reports fOr the Eastern GSA in accordance with NPDES Monitoring and Reporting Program requirements. In August 2005, the RWQCB rescinded the NPDES permit for the Easter GSA treatment system and the permit was convertedm Substantive Requirements under CERCLA. Starting in the second semester of 2035, the Eastern USA mound water and treatment system monitoring results were returned in Permits the sera,-annual Site-Wide Compliance Monitoring Repo with regulatory cormuflumfuce, I n 2012,after Mc regulatory agencies agreed that ground water cleanup standards in the Lastem GSA Subarea had been achieved, ground water monitoring of the pastern GSA extraction and monitor wells ceased with concurrence Gam the regulatory agencies (Ferry and Noltapple, 2012). As dismissed an Section 2.3 above and presented in Appendix A, DOEdA NL conducted additional mechanics for SVOCs in ground water in the Eastern GSA debris burial trenches area in 20 W. SVOCs were nth delected in any a the ground rotor samples collected in the Fssom GSA debris burial trench area above Me analytical method Defaming limits, DOE and the negulamry agencies agreed Met the investigation of SVOCs in the Eastern GSA debris burial trench area was complete, and an farther aeuun for these constituents is needed. 4. Attainment of Ground Water Cleanup Standards As discussed in Section 2.61 me Eastern GSA gmund water extraction and treatment system was shut down and placed on standby in February 2007 after VOC concentrations had dropped Wow MCI . cleanup standards in July 2005. VOCcnncentrdtionsingmundwaterw mmonimred boom February 2007 until February 2012 to veriljy that concentrations remained below cleanup standards.