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sECOR <br /> • International Incorporated <br /> November 21, 2000 <br /> Project 077 41991 056 <br /> Mr Harlin Knoll <br /> San Joaquin County Environmental Health Division <br /> 304 East Webber Avenue, Third Floor <br /> Stockton, CA 95202 <br /> Re Work Plan for Site Assessment <br /> Former Chevron Service Station 9-8632 <br /> 575 Grant Line Road <br /> Tracy, CA <br /> Dear Mr Knoll <br /> This letter, prepared by SECOR International Incorporated (SECOR) on behalf of <br /> Chevron Products Company,presents a work plan for site assessment at the above <br /> referenced site (Figures 1 and 2) The site assessment will consist of the drilling and <br /> installation of four 4-inch groundwater remedial wells The purpose of this assessment <br /> is to further evaluate the extent of hydrocarbon impact to soil and groundwater, and to <br /> perform a dual phase extraction feasibility test at the site <br /> This work plan includes a brief discussion of site background and previous <br /> investigations, proposed scope of work, and schedule Field and laboratory procedures <br /> are presented as Attachment A <br /> SITE BACKGROUND AND PREVIOUS INVESTIGATIONS <br /> The site a former service station Iocated at 575 Grant Line Road in Tracy, California <br /> The site is now a used car lot located in a mixed light commercial and residential area <br /> In 1964 the product lines and an unspecified number of underground storage tanks <br /> (USTs) were installed at the site <br /> In 1984, the steel USTs and product lines were removed They were replaced with <br /> three 10,000-gallon capacity gasoline USTs, and one 1,000-gallon capacity waste oil <br /> UST, all of single-wall fiberglass construction <br /> In May 1994, the USTs, product lines, hoists, sand/grease trap, and approximately 400 <br /> cubic yards of impacted soil generated during excavation activities were removed from <br /> the site As approved by San Joaquin County Public Health Services (SJCPHS), <br /> 3017 Kilgore Road, Suite 100, Rancho Cordova, CA 95670 916 861 0400 916 861 0430 Fax www secor com <br />