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Is Free Product (FP) Present on Sao No <br /> • FP Recovered This Quarter NIA <br /> Cumulative FP Recovered to Date NIA <br /> Current Remediation Techniques SVE/Air Bubbling <br /> Approximate Depth to Groundwater 45 42 to 47 62 <br /> Groundwater Flow Direction Southeast <br /> Groundwater Gradient 0 001 <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 (TPM) <br /> Conc End of Period (lab) 1,600 Mg/M3 <br /> Benzene Conc End of Period (lab) <0 8 mg/m3 <br /> Flow Rate End of Period 58 cubic feet per minute <br /> Applied Vacuum This Period 118 inches of water <br /> HC Destroyed This Period (lab) 383 pounds <br /> Utility Usage (electrical/gas/propane) 28,517 kilowatt hours <br /> Operating Hours This Period 1,104 <br /> Percent Time Operational 836% <br /> Number of Auto Shutdowns 1 <br /> CURRENT SOURCE (BEFORE DILUTION) INFLUENT SUMMARY (LAB) <br /> Total Petroleum Hydrocarbons as <br /> Gasoline(TPHG) Conc This Period 1,600 mg/m3 _ <br /> TPHG Conc Last Period 3,200 m Im3 - <br /> Initial TPHG Conc 9,900 mg/m3 (November 9, 1994 [following system upgrade]) <br /> Benzene Conc This Period <0 8 mg/m3 <br /> Benzene Conc Last Period <0 4 m Im3 <br /> Initial Benzene Concentration 290 m Im3 November 9, 1994[following system u rade <br /> DISCUSSION <br /> Results of this monitoring event indicate that concentrations of dissolved gasoline hydrocarbons <br /> decreased in well MW-2 since the previous sampling event The levels of dissolved hydrocarbons in <br /> wells MW-1, MW-3 through MW-7, and MW-1a are consistent with levels detected In previous sampling <br /> events The groundwater gradient and direction of groundwater flow (southeast) were also generally <br /> I,I SACN TJ0\0805�08051140 8DS-97\cbcU l <br />