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1. INTRODUCTION <br /> At the request of Chevron U.S.A.Inc.,EA has assessed soil and groundwater conditions and <br /> outlined further investigation and remedial action at former Chevron Service Station(SS)9-1918 <br /> in Stockton, California. This work plan briefly summarizes the results of the investigation to <br /> date,describes the present hydrogeologic conditions at the site,and outlines the procedure to <br /> install a groundwater monitoring well to further define the extent of the dissolved petroleum <br /> hydrocarbons found under the site. <br /> 1.1 LOCATION AND SITE SETTING <br /> Former Chevron SS 9-1918 is located at 45 East Harding Way,on the northwest corner of the <br /> intersection of Harding Way and El Dorado Street(Figure 1). The vacant and unimproved site is <br /> located three miles east of Interstate 5 and less than one mile west of the State Hospital complex <br /> at Harding Way and California Street. Gasoline products were actively dispensed and automo- <br /> biles were serviced at this site between 1953 and 1988. In 1984,the original station was remod- <br /> eled and fiberglass underground fuel storage tanks were installed. The station was deactivated <br /> and demolished early in 1988,and the fiberglass underground storage tanks were excavated and <br /> removed on 24 February of that year. <br /> 1.2 SITE DESCRIPTION <br /> The site of the former Chevron SS 9-1918 is surrounded by a residential area to the north and <br /> west(Figure 2). To the south and east of the site are commercial and retail businesses. There is <br /> a Shell service station east of the site across El Dorado Street and a restaurant to the south across <br /> East Harding Way. Southeast,across the intersection,is a Regal service station. <br /> The site is approximately 0.7 miles north of McLeod Lake,about 1.2 miles south of the Calav- <br /> eras River, and about 0.7 miles east of Yosemite Lake at the end of the Smith Canal (see <br /> Figure 1). The site is at an elevation of approximately 12 feet above mean sea level and grades <br /> gently to the east at about 8 feet per mile(0.0017). <br /> 1 <br /> =Bill I MINI <br /> c7Q91918f41 - <br />