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Geological Teclut ics /n co <br /> 1101 7h street <br /> Modesto,California 95354 <br /> (209)522-4119/lax#522-4227 <br /> Feasibility Work Plan <br /> In Situ Remediation Pilot Test <br /> George's Station <br /> 1600 Durham Ferry Rd. <br /> Tracy, California <br /> Project No. 425.2 <br /> June 14, 2005 <br /> 1.0 INTRODUCTION <br /> The site, located at the intersection of Highway 33 and Durham Ferry Road, has been owned <br /> and operated by George and Mei Teranishi since the 1940's as an automobile repair facility <br /> and market. Gasoline was sold at the site until 1990, when the tanks were removed. <br /> The site has been undergoing site characterization work commencing 1995 by Del-Tech <br /> Geotechnical Support Services. Three monitoring wells were installed in early 1995 and <br /> elevated levels of petroleum hydrocarbons were detected on the northern and western sides of <br /> the property. <br /> In January of 1997 Geological Technics Inc. (GTI) contracted with Mr. and Mrs. Teranishi to <br /> provide additional site characterization work regarding the definition of the lateral and <br /> vertical extent of petroleum hydrocarbons in the soil and groundwater. In early April 1997, <br /> GTI installed five new water-table monitoring wells and one intermediate depth, discretely <br /> screened, monitoring well. In mid 1998, GTI installed two additional intermediate depths, <br /> discretely screened, monitoring wells and one deep discretely screened, monitoring well. <br /> Quarterly groundwater monitoring reports have been submitted throughout the project. <br /> In late July 2001, GTI and Del Tech performed a limited soil excavation at the site and <br /> removed approximately 500 cubic yards of contaminated soil. Analytical data show that <br /> approximately 4,900 pounds of TPH-G were removed from the site. At the end of October <br /> 2001, the stockpiled soil was transported and disposed of at Forward Landfill. GTI submitted <br /> a report on the soil excavation activities on January 28, 2002. <br />