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tfi <br /> �4 <br /> Current Phase of Project Remediation <br /> Frequency of Groundwater Sampling Quarterly <br /> Frequency of Groundwater Monitoring Quarterly <br /> Sampling Date March 24, 1997 <br /> 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 S ar in <br /> Approximate Depth to Groundwater 43 20 to 45 29 <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 <br /> • (TPH) Conc End of Period(lab) ___2,500 mg/m3 <br /> Benzene Conc End of Period(lab) 37 Mg/M3 <br /> Flow Rate End of Period 39 cubic feet per minute <br /> Applied Vacuum This Period 70 inches of water <br /> HC Destroyed This Period(lab) 623 bounds <br /> Utility Usage <br /> (electrical/gas/propane) 30,299 kilowatt hours <br /> Operating Hours This Period 1,752 <br /> Percent Time Operational 80% <br /> Number of Auto Shutdowns 2 ower failures <br /> CURRENT SOURCE (BEFORE DILUTION) INFLUENT SUMMARY(LAB) <br /> Total Petroleum Hydrocarbons as <br /> Gasoline (TPHG) Conc This <br /> Period 2,500 mg/m3 <br /> TPHG Conc Last Period 3,600 mg/m3 <br /> Initial TPHG Conc 9,900 mg/m3(November 9, 1994 [following system <br /> upgrade]) <br /> Benzene Conc This Period 37 Mg/M3 <br /> • Benzene Conc Last Period 18 mg/m3 - - <br /> Initial Benzene Concentration 290 mg/m3(November 9, 1994 following system upgrade])_ <br /> SACNN\PJM805\080511408A5-97\p¢1 <br />