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11 ? <br /> Current Phase of Project Remediation <br /> Frequency of Groundwater Sampling All Monitoring Wells =Quarter) <br /> Frequency of Groundwater Monitoring Quarterly <br /> Sampling Date June 4 1999 <br /> Is Free Product (FP) Present on Site No <br /> FP Recovered This Quarter NIA <br /> Cumulative FP Recovered to Date N/A <br /> Current Remediation Techniques SVE/Air Bubbling (SVE system down since <br /> 11/24/97 due to low TPHG concentrations in soil <br /> vapor) _ <br /> Approximate Depth to Groundwater 35 36 to 37 56 <br /> Groundwater Flow Direction East-southeast <br /> Groundwater Gradient 0 0009 ft/ft <br /> SVE QUARTERLY OPERATION AND PERFORMANCE <br /> Equipment Inventory Airex Katox Catalytic Oxidizer(100-scfml <br /> Operating Mode Catalytic <br /> SJVUAPCD Permit No N-3218-1-0 <br /> Total Petroleum Hydrocarbons (TPH) SVE system down since 11/24/97 due to low <br /> Conc End of Period (lab) TPHG concentrations in soil vapor <br /> Benzene Conc End of Period (lab) NA <br /> Flow Rate End of Period NA <br /> Applied Vacuum This Period NA <br /> HC Destroyed This Period (lab) NA <br /> Utility Usage (electrical/gas/propane) NA <br /> Operating Hours This Period NA <br /> Percent Time Operational NA <br /> Number of Auto Shutdowns NA <br /> CURRENT SOURCE (BEFORE DILUTION) INFLUENT SUMMARY(LAB) <br /> Total Petroleum Hydrocarbons as <br /> Gasoline (TPHG) Conc This Period SVE system down since 11/24/97 due to low TPHG <br /> concentrations in soil vapor and equipment failure <br /> TPHG Conc Last Period NA <br /> Initial TPHG Conc 9,900 m Im3 November 9, 1994 [following system upgrade]) <br /> Benzene Conc This Period NA <br /> Benzene Conc Last Period NA <br /> . Initial Benzene Concentration 290 mg/m3 (November 9, 1994[following system upgrade]) <br /> CPUC\ArclvveWco12130\Qtr1y12130Q299 DOC-9811%1 A"44 <br />