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Preliminary Site Investigation Work Plan - July 1997 <br /> Former HERSHEL VAN_ CE AUTO REPAIR <br /> 4125 East Main Street, Stockton, California <br /> 1.0. INTRODUCTION <br /> In accordance with the request of Mr. Jim Rice, Advanced GeoEnvironmentai, Inca(AGE) has <br /> prepared the enclosed Preliminary Site Investigation Work Plan for the collection of soil samples, <br /> if applicable, beneath the former underground storage tank (UST) area at 4125 East Main Street, <br /> Stockton, California. <br /> The scope of work initially includes the advancement of one soil probing within the former LIST area <br /> and collection of soil samples. The location of the site is illustrated in Figure 1 - Location Map <br /> (USGS 7.5 Minute Topographic Series: Stockton East Quadrangle, Photorevised 1987). A plan of <br /> the site is illustrated on Figure 2 - Site Plan. <br /> This Work Plan is prepared in accordance with San Joaquin County Public Health Services - <br /> Environmental Health Division (PHS-EHD) and Central Valley Regional Water Quality Control <br /> Board (CVRWQCB) guidelines for the investigation.of UST sites. <br /> 2.0. BACKGROUND <br /> 2.1. SITE LOCATION AND DESCRIPTION <br /> The site is located in a flat, commercial area of eastern Stockton, California, at an approximate <br /> elevation of 15 feet above mean sea level. The site is further located on the northwest intersection <br /> of East Main Street and Adelbert Street, and is currently occupied by Mike's Tire Service. The <br /> property was formerly occupied by Hershel Vance Auto Repair. <br /> 2.2. UNDERGROUND STORAGE TANK REMOVAL <br /> It is our understanding that one 300-gallon gasoline and one 500-gallon gasoline USTs and <br /> associated piping were removed from the site in May 1990. Two soil samples were collected from <br /> beneath both USTs. <br /> The samples were transported to a State-certified laboratory and analyzed for total petroleum <br /> hydrocarbons quantified as gasoline(TPH=g),volatile aromatics(benzene,toluene,.ethylbenzene and <br /> xylenes: BTE&X),Ethylene dibromide(EDB)and organic lead. TPH-g was detected in soil samples <br /> collected beneath the eastern tank (Tank #2) at 340 parts per million (ppm); ethylbenzene and <br /> xylenes were detected in the same sample at concentrations of 3.7 and 39 ppm, respectively. <br /> Advanced GeoEnviromnental, Inc. <br />