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Date- July 29,2003 <br /> ` Quarter 2°d Quarter,2003 <br /> APPENDIX A <br /> REMEDIAL SYSTEM PERFORMANCE EVALUATION <br /> The SVE/AS systems were initiated on January 4, 1996 and June 18, 1997, respectively A brief description and <br /> performance evaluation of the remedial system during the Second Quarter,2003 are presented below <br /> SVE System <br /> The SVE system has been shut down since June 2001 The SVE system is comprised of 11 SVE wells (VES-1 <br /> through VES-7, ATR-3, ATR-4, ATR-5, and TEX-1) and a King Buck Hasstech 100-cfm catalytic oxidizer The <br /> SVE system is permitted by the San Joaquin County Unified Air Pollution Control District (SJCUAPCD)Permit to <br /> Operate Number N-3413-1-0,for operation through December 31,2005 <br /> The system remained off due to low influent concentrations To date, the SVE system has removed approximately <br /> 3,616 6 pounds of TPHg and 10 6 pounds of benzene from the soil and groundwater beneath the site Historic SVE <br /> system performance and analytical data are summarized in Tables A-1 through A-3 Graphical presentations of <br /> TPHg mass removal and influent concentration data are shown on Figures A-1 and A-2 <br /> AS System <br /> The AS system is comprised of 11 AS wells (VES-1 through VES-7, S-1 through S-3, and SMW-1) and a Conde <br /> 7 5-hp sparge blower AS system operational data,including well open/closed status,flow rate and applied pressure, <br /> are presented in Table A-4 Historic dissolved oxygen levels for site wells are presented in Table 1 of this report <br /> Conclusion <br /> The AS system was restarted in January 2003,the SVE system remains off <br /> Attachments Table A-I - Soil Vapor Extraction System Performance Data <br /> Table A-2 - Soil Vapor Extraction Emission Data <br /> Table A-3 - Soil Vapor Extraction System Well Data <br /> Table A-4 - Air Spargmg System Well Data <br /> Figure A-1 - Soil Vapor Extraction Mass Removal Trend <br /> Figure A-2 - Soil Vapor Extraction System Hydrocarbon Concentrations <br /> Appendix A, Attachment A-1 Remedial System Field Data Sheets,Analytical Reports,and <br /> Chain-of-Custody Documentation <br /> i <br /> R.1WP,�,cssU5 RP ARC010209AQuartubQ QTR 0312093 GWMR 2Q03 doc Page A-1 <br />