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l4r Js� _ <br /> r� <br /> ATTACHMENT A <br /> REMEDIAL SYSTEM PERFORMANCE EVALUATION <br /> Soil vapor extraction (SVE) and air sparging were Initiated on January I, 1995 and May 5, 1995, <br /> respectively A brief description and performance evaluation of the remedial system between <br /> March 31 and June 15, 1998 is presented below <br /> SVE System <br /> The SVE system is comprised of 14 SVE wells (V-1 through V-13, and E-6) and a Airex Katox <br /> 100 catalytic oxidizer The SVE system is permitted by the San Joaquin County Unified Air <br /> Pollution Control District (SJVUAPCD) Permit to Operate Number N-3601-1-0, for operation <br /> through January 1, 2000 <br /> The SVE system was not operated this quarter due to high groundwater elevations making <br /> operation of the SVE not feasible <br /> Air Sparging System <br /> The air sparge system is comprised of 9 air sparge wells (S-1 through S-9) and a MD Pneumatics <br /> Model 3202 7 5-horsepower blower <br /> The air sparging system was repaired and restarted this quarter Air sparging system operational <br /> data including well open/closed status, flow rate and applied pressure data are presented in <br /> Table A-1 Dissolved oxygen data is presented in Table A-2 Treatment system field data sheets <br /> are included as Attachment A-A <br /> Conclusion <br /> SECOR will continue to operate the air sparge system The SVE system will remain off until <br /> groundwater elevations decline to a point where SVE is feasible <br /> Attachments Table A-1 - Air Sparging System Performance Data <br /> Table A-2 - Dissolved Oxygen Well Concentration <br /> Attachment A-A Treatment System Field Data Sheets <br /> 7G600-019-01 QQ98 doc A- I September 25 1998 <br />