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Date November 4,2002 <br /> Quarter 3`a Quarter,2002 <br /> • <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 Third Quarter,2002 are presented below <br /> SVE System <br /> The SVE system is comprised of I1 SVE wells (VES-I through VES-7, and ATR-3, ATR-4, ATR-5, and TEX-1) <br /> and a King Buck Hasstech 100-cfm catalytic oxidizer The SVE system is permitted by the San Joaquin County <br /> Unified Air Pollution Control District (SJCUAPCD) Permit to Operate Number N-3413-1-0, for operation through <br /> 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 Historical <br /> SVE 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 The AS system operated at an average infection pressure of 5 9 psi AS system operational <br /> • data, including well open/closed status, flow rate and applied pressure, are presented in Table A-4 Historical <br /> dissolved oxygen levels for site wells are presented in Table 1 of this report <br /> Conclusion <br /> The AS system will continue to be operated during the fourth quarter, the SVE system will be pulsed, and then <br /> evaluated to determine if it will remain operational <br /> K V5 BP ARCM20931Qumterly\3_QTR 0212093 GWMR3Q02 doc Page A-1 <br />