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w <br /> w i <br /> 1450 Harbor Boulevard, Suite G• West 5acramNnto,(�A 95691 (916) 325-25$0 • Fax (916) 32.5-2570 <br /> Attention: Mr.Russell Chapin <br /> Subject: Work Plan for Wank Removal <br /> 1766 Monte Diablo Avenue <br /> Stockton,California <br /> Mr. Chapin: <br /> The following work plan describes proposed procedures associated with <br /> removal of underground fuel storage sites from the Chapin Brothers service station <br /> and auto repair facility located at 1766 Monte Diablo Avenue in Stockton,California. <br /> The purpose of this work plan is to delineate a series of steps which win be <br /> undertaken to facilitate tank removal and future,required environmental <br /> investigation and contamination mitigation options. <br /> BACKGROUND <br /> The site currently contains two 4,000-gallon and two 8,000-gallon <br /> underground storage tanks and one underground waste oil tank. The tanks are <br /> thought to be 17 to 40 years old. The site is c&&Ed by iipjhilfaW—concrete paving -� <br /> and the site building. The 8,000-gallon underground tanks are present in the <br /> northeastern quadrant of the site;they contained super unleaded and regular leaded j <br /> gasoline for retail sale. The 4,000-gallon tanks along the northwestern edge of the <br /> site are connected by piping and stored regular unleaded gasoline. One 500-gallon <br /> waste oil tank is present between the site building and the eastern property line. <br /> We previously conducted a subsurface environmental.investigation to <br /> evaluate soil and groundwater conditions at site. The investigation included drilling <br /> one soil boring to a depth of approximately 35 feet and installing one monitoring <br /> well. The soil encountered in the soil boring consisted of sandy silt in the upper 12 ft � <br /> and slightly silty sand from 12 ft to at least 35 ft. Three soil samples and one <br /> 1450 Harbor Boulevard, Suite G• Wast 5acramento,Cn 95691 • (916) 325-2580 + Fax (916) 325-2570 <br />