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• Mr Kyle Christie Project 0805-114 04 May 15, 1995 Page 4 70 cubic/feet per irunute, the amount of gasoline removed through the end o the first quarter 1995 is estimated to be approximately 11,007 pounds or 1,784 gallons Soil vapor extraction wells VW-1 through VW-12 were all fully opened since start-up until January 3, 1995 Since then, the system has been operating ith VW-5, VW-9, VW-11, and VW-12 closed (see Table 5) The air sparge system was shut down on February 3, 1995, along with the rest of the system. The remediation %ystem was shut off on February 3, 1995 after sample results from January 23, 1995, showed poor removal rate (approximately 27 percent),by the catalytic oxidizer The unit remained off throu h the end The catalyst was removed and analyzed by AIREX Early analysis indicated that the catal%st had been exposed to high temperatures outside operational parameters and failed The failure is calledcatai st centerin AIREX is currently reviewing the control system and other equipment to prevent any future problems ACTIVITIES PERFORMED DURING THE FIRST QUARTER A ; ue:�1n-rereent was mailed to Mr and Mrs Cheam cproperty owners north of the onJan5, 1995 ANTICIPATED WORK Once ARCO has received authorization to drill on the adjacent property north of the site, a workplan outhr ung additional assessment activities will be submitted to the SJCPHS as well as the necessary permit application ARCO will continue to perform quarterly groundwater monitoring The next sampling event is scheduled in May 1995 CONCLUSIONS Hydrocarbon concentrations continue to fluctuate in groundwater underlying the site The st c ncentxations were detected iii wells MW-1 and MW-5 The groundwater flow direction was towards the east, which is generally consistent with past data EMCON requests the assistance from the SJCPHS to obtain access from the adjacent property owners to the liorth W NN pio'sp8OW8051140 4bs-95 pas 5