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PRELIMINARY SITE INVESTIGATION REPORT Tradeway Chevrolet 1460 East Yosemite Avenue, Manteca, California 1.0. INTRODUCTION Advanced GeoEnvironmental, Inc. (AGE) has prepared this Preliminary Site Investigation Report for the property located at 1460 East Yosemite Avenue, Manteca, California (Figure 1). This report presents the results of the shallow subsurface soil and ground water investigation performed at the site. The purpose of this investigation is to assess the potential presence of petroleum hydrocarbon compound impacts to soil and/or ground water related to current and former site operations. Areas of potential environmental concern to be investigated included in -ground hydraulic lifts, an abandoned hydraulic lift, a former gasoline underground storage tank (UST) location, a former waste oil UST location, and select locations of surficial petroleum hydrocarbon staining. former waste oil above ground storage tank (AST) location. 2.0. BACKGROUND The site is located in the eastern portion of Manteca, California, on the southwest corner of the intersection of East Yosemite Avenue and Highway 99. (Figure 1). 2.1. SITE DESCRIPTION The site is situated on an approximately 5.5 -acre parcel and is currently occupied by Tradeway Chevrolet automobile dealership and Tradeway Auto Body shop. The auto body shop is located south of the automobile dealership (Figure 2). The dealership building is composed of an automobile service area, parts warehouse, business offices, and a showroom. The auto body shop building consists of an automobile service area, paint booths, and business offices. In addition, the auto body shop building contains an automobile wash -down and detailing area that is operated by Tradeway Chevrolet. 2.2. UNDERGROUND STORAGE TANK REMOVAL It is AGE's understanding that two USTs were formerly located at the site immediately south of the Tradeway Chevrolet service area (Figure 2). An approximately 550 -gallon capacity gasoline UST was removed from the site in December 1986. In October 1998, an approximately 500 -gallon capacity waste oil UST was removed from the site. During the removal of USTs, no petroleum hydrocarbon discoloration or odor were reported by the San Joaquin County Public Health Services - Advanced GcoEnvironmental, Inc.