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`ran <br /> • <br /> ATTACHMENT A <br /> REMEDIAL SYSTEM PERFORMANCE EVALUATION <br /> Soil vapor extraction (SVE) and air sparging were initiated on January 4, 1996 and June 18, 1997, <br /> respectively A brief description and performance evaluation of the remedial system between <br /> March 31 and June 11, 1998 is presented below <br /> SVE System <br /> The SVE system is compnsed of 11 SVE wells (VES-1 through VES-7, and ATR-3, ATR-4, ATR-5, <br /> and TEX-1) and a King Buck Hasstech 100 cfin catalytic oxidizer The SVE system is permitted by <br /> the San Joaquin County Unified Air Pollution Control District (SJVUAPCD) Permit to Operate <br /> Number N-3413-1-0, for operation through January 1, 2002 <br /> The SVE system was only operated from May 28 to June 11, 1998 due to high groundwater elevations <br />. and low influent vapor concentrations making operation of the SVE not feasible SVE system <br /> operational and analytical data, including hours of operation, applied vacuum, flow rate, ambient <br /> dilution status, field FID, influent TPH-g and benzene concentrations and mass removal data, are <br /> presented in Table A-1 Emissions data is provided in Table A-2 SVE wells data, including <br /> open/closed status, vacuum, flow, and analytical, data are presented as Table A-3 Graphical <br /> presentation of TPH-g and benzene mass removal and concentration data are shown on Figures A-1 <br /> and A-2 <br /> Air Spargmg System <br /> The air sparge system is comprised of 11 air sparge wells (VES-1 through VES-7, S-1 through S-3, <br /> and SMW-1) and a Conde 7 5-horsepower sparge blower <br /> The air sparging system was restarted on May 28, 1998 and operated at an average flow rate of 32 cfin <br /> at an infection pressure of 9 psi Air sparging system operational data including well open/closed <br /> status, flow rate and applied pressure data are presented in Table A-4 Dissolved oxygen levels for site <br /> wells is presented as Table A-5 <br /> Attachments Table A-1 - Soil Vapor Extraction System Performance Data <br /> Table A-2 - Sod Vapor Extraction Emission Data <br /> Table A-3 - Soil Vapor Extraction System Well Data <br /> Table A-4 - Air Sparging System Well Data <br /> Table A-5 - Dissolved Oxygen Well Concentrations <br />. Figure A-1 - Soil Vapor Extraction System Removal Trend <br /> Figure A-2 - Soil Vapor Extraction System Hydrocarbon Concentrations <br /> 7G600-026 0112Q98 doc A-1 September 24 1998 <br />