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i <br /> GROUNDWATER <br /> TECHNOLOGY, INC. 4080ds:'iku Lamt, CA9.0,211 <br /> r41:,�Gi62ar� <br /> December 19, 1988 <br /> Mr. Joe McIntyre <br /> San Joaquin Local Health District <br /> Air Pollution Control <br /> 1601 East Hazelton Avenue <br /> Stockton, CA 95205 <br /> Re: Summary Report, operation of a Gasoline Air-Stripping <br /> System, 9110 Thornton Road, Stockton, California. <br /> Dear Mr. McIntyre: <br /> Operation of the air-stripping system at the above referenced <br /> site was initiated in March, 1987. Since system startup, air- <br /> stripper effluent and influent samples have been collected <br /> monthly at the minimum. <br /> r <br /> Mass Balance Calculations based on average total flow rates, <br /> influent concentrations and the blower flow rate have been <br /> completed for all sampling data. An example of the Mass Balance <br /> Calculations is attached. <br /> Table 1 presents a summary of laboratory analyses results of air- <br /> stripper influent and effluent samples. Laboratory reports are <br /> also attached. Table 2 presents a summary of pumping rates and <br /> calculated benzene and total petroleum hydrocarbon emissions over <br /> the entire period of system operation. Review of the data <br /> indicate that the maximum benzene emission from the stripper was <br /> approximately .547 lbs./day, and that the maximum TPH emission <br /> was 3.78 lbs./day. The average benzene emission rate was <br /> approximately 2.80 x 10`2 lbs./day. <br /> Offices thmughour the t:S,Canada and 01 erseas <br />