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AY - <br /> 1433 North Market Boulevard •Sacramento California 95834-1943 • (916)928-3300 • Fax(916)928-3341 <br /> ENVIRONMENTAL HEALTH DIVISION <br /> 304 E Weber Ave Third Floor <br /> P O Box 388, Sto6qon CA 95201-0388 <br /> Approved CY <br /> Dented 0 <br /> Conditions We dmneew February 2, 1998 <br /> ^� aM-t>-- CA-CL L-3 �% Project 22613-100 002 <br /> Date Z by_ ,J <br /> Mr Ron Rowe S�PLe v"01Z5 LJ Lu5 <br /> San Joaquin County Pubhc Health Services " <br /> Environmental Health Division <br /> P O Box 388 <br /> Stockton, California 95201-0388 <br /> Re Workplan to Design, Install, Operate, and Maintain a Remediation System <br /> at The Transmission Shop, Located at 515 West Charter Way, Stockton, California <br /> Dear Mr Rowe <br /> On behalf of Don Rodgers, EMCON is submitting this workplan to design, install, operate <br /> and maintain a remediation system at the Transmission Shop, located at 515 West Charter <br /> Way, Stockton, Califorrua (see Figure 1) The primary objective of a remediation system is <br /> to comply with the San Joaquin County Public Health Services (SJCPHS) recommendation <br /> to remediate petroleum hydrocarbon-impacted soil at the subject site <br /> EMCON proposes to design, install, and perform operation and maintenance (O&M) of a <br /> soil vapor extraction (SVE) remediation system. The remediation system will consist of a <br /> vacuum blower to extract soil vapors from the modified vapor extraction wells and an <br /> abatement device to combust the extracted vapors The SVE system volatilizes high <br /> concentrations of hydrocarbons present in the soil and in the capillary fringe zone, which <br /> may provide a continuous source of hydrocarbon impact to the groundwater beneath the <br /> site <br /> BACKGROUND [. <br /> The site is located at the est corner of the intersection of Charter Way and Lincoln <br /> Street in Stockton, California (see Figure 1) The property is located in a commercial area <br /> and is currently being used as a transmission repair shop Based on information provided by <br /> the SJCPHS, two underground storage tanks (USTs) were present, and the site was <br /> historically used as a retail service station, with gasoline dispensing activities ceasing <br /> sometime in the 1950s It is unknown when one of the USTs and dispenser islands were- <br /> removed However, based on information provided by SJCPHS, Thorpe Oil of Lodi, <br /> California, removed the remaining UST in February 1996 Residual hydrocarbons were <br /> detected beneath the UST However, total petroleum hydrocarbons as gasoline (TPHG), as <br /> SAC�N\PJ2\2613\261310002AB-9"baccus 3 <br />