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• <br /> ATTACHMENT A <br /> REMEDIAL SYSTEM PERFORMANCE EVALUATION <br /> Soil vapor extraction (SVE) and air sparging were initiated on January 1, 1995 and May 5, 1995, <br /> respectively A brief description and performance evaluation of the remedial system between <br /> July 29 and September 11, 1998 is presented below <br /> SVE System <br /> The SVE system is compnsed of 14 SVE wells (V-I 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 system not feasible <br /> Air Sparging System <br /> The air sparge system is comprised of 9 air sparge wells (S-I through S-9) and a MD Pneumatics <br /> Model 3202 7 5-horsepower blower <br /> Previously, the air sparging system was repaired and re-started June 15, 1998 During the quarter, <br /> the air sparging system was fully operational Air sparging system operational data including well <br /> open/closed status, flow rate and applied pressure data are presented in Table A-1 Morutonng <br /> well dissolved oxygen data is shown on Table A-2 Treatment system field data sheets are <br /> 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 /> 7G600-019-01\3Q98 doc A-i December 11 1998 <br />