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Is Free Product(FP) Present on Site No <br /> FP Recovered This Quarter NIA <br /> Cumulative FP Recovered to Date NIA <br /> Current Remediation Techniques SVE/Air Bubbling (SVE system <br /> down since 11/24/97 due to low <br /> TPHG concentrations in soil vapor) <br /> Approximate Depth to Groundwater 40 77 to 42 95 <br /> Groundwater Flow Direction Southeast <br /> Groundwater Gradient 0 002 <br /> SVE QUARTERLY OPERATION AND PERFORMANCE. <br /> Equipment Inventory Airex Katox Catalytic Oxidizer(100-scfm) <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 11124197 due to low TPHG <br /> concentrations in soil vapor <br /> TPHG Conc Last Period 1,800 mg/m3 <br /> Initial TPHG Conc 9,900 mg/m� November 9, 1994(following system upgrade]) <br /> Benzene Conc This Period NA <br /> Benzene Conc Last Period — <0 8m9/m3 <br /> Initial Benzene Concentration 290 mg/m3 November 9, 1994 [following system u rade <br /> DISCUSSION <br /> Results of this monitoring event indicate that concentrations of dissolved gasoline hydrocarbons in wells <br /> MW-1 through MW-7, and MW-10 are consistent with levels detected in previous sampling events The <br /> SAG\N\PJ"805 08051140 9AS-98\pzusmer 1 <br />