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Date. May 19,2003 <br /> Quarter V 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 First Quarter,2003 are presented below <br /> SVE System <br /> The SVE system is comprised of ll SVE wells (VES-1 through VES-7, ATR-3, ATR-4,ATR-5, and TEX-1) and a <br /> King Buck Hasstech 100-cfm catalytic oxidizer The SVE system is permitted by the San Joaquin County Unified <br /> Air Pollution Control District (SJCUAPCD) Permit to Operate Number N-3413-1-0, for operation through <br /> December 31,2005 The SVE system has been shut down since June 2001 <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 /> K Mproces V5 RP ARCD\02093\QuanerlyA QrR 0312093 GWMR1Q03 doc Page A-1 <br />