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Preliminary Site Assessment Work Plan August 1998 AMERICAN TRANSFER COMPANY 2701 South Highway 99,Stockton, California 1.0. INTRODUCTION . At the request of Mr. Ron Gritsch of American Transfer Company,Advanced GeoEnvironmental, Inc. (AGE) has prepared this Preliminary Site Assessment Work Plan for the property located at 2701 South Highway 99, Stockton,California. Initially,the scope of work includes the advancement of one soil probe boring and collection of soil samples. However, if field screening indicates that hydrocarbon-impacted soil and/or ground water is present at the site,additional probe borings and/or ground water monitoring wells will be advanced or installed at the site. The location of the site is -illustrated in Figure 1 - Location Map. A plan of the site including• proposed probe boring locations, is illustrated in Figure 2 -Site-Plan. This work plan is prepared in accordance with San Joaquin County Public Health Services - Environmental Health Division(PHS-EI-ID)and the Central Valley Regional Water Quality Control Board guidelines for the investigation of underground.storage.tanks (UST) sites. 2.0. BACKGROUND 2.1 SITE LOCATION SND DESCRIPTION The site is located in an unincorporated industrial/commercial area of Stockton, California, along the South Highway 99 Frontage Road (Figure 1.). American Transfer Company presently operates a trucking facility on the property. Two structures are located on the property: one office building and one shop building with a canopy. A domestic well is located near the southeast corner of the property, approximately 200 feet from the former UST excavation. The depth and screened interval-of this well is not known at this time. 2.2. UNDERGROUND STORAGE TANK REMOVAL One 10,000-gallon diesel UST and one 1,000-gallon diesel UST were removed from the property on 01 May 1998. Five soil samples were collected from beneath the USTs and dispenser area; three soil samples were collected from the excavated(stockpiled)soil. The soil samples were transmitted under chain-of-custody to GeoAnalytical Laboratories,Inc. of Modesto,California and analyzed for total petroleum hydrocarbons quantified as diesel and motor oil (TPH-d, TPH-mo) and purgeable aromatics (benzene, toluene; ethylbenzene and total xylenes: BTEX) in accordance with EPA methods 3350(LUFT) and 8020. Advanced GeoEnvironmental,Inc.