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I <br /> P <br /> r:\pr0jCCt5\5M\tyinv.rcp <br /> Ea <br /> t 1.0 INTRODUCINTON <br /> !,.a 1.1 Site Description i <br /> 1 The subject site, referred to as the Thaanas Yard, is a small trucking terminal yard located <br /> at 3437 Newton Road, Stockton (Figur,. 1 - Site Plan). The yard is a separately leased <br /> i portion of the several acre Delta Truck Sales property which includes truck sales, fueling, <br /> kA and repair facilities bounded by Newton Road, Cherokee Road, and California State <br /> }.. Highway 99. The Thomas Yard itself consists of a fenced, partially asphalt paved area <br /> a <br /> approximately 100 by 200 feet. There is a garage-type building on the site with roll-up <br /> doors on either side and several offices. Next to the building is an open excavation <br /> surrounded by ferning where two underground sterage tanks and piping were removed in <br /> January 1989. Approximately 300 cubic yards of material consisting of backfill and native <br /> soil was removed during the tank excavation and stockpiled on site on plastic. <br /> Greand water levels in nearby monitoring wells show that the.water table in this area is at <br /> a depth of approximately 85 &M. <br /> ``4 1.2 Objective and Scope of Work <br /> This investigation was prompted by the San Joaquin County Department of Public Health <br /> J <br /> A Services and Delta Truck Sales when hydrocarbons were reported in soil samples taken in <br /> �uJanuary 1989 from native soil beneath the former underground tank locations. The <br /> objectives of this project,as outlined in ESE's approved work plan to San Joaquin County <br /> dated October 8, 1990 are to: <br /> 1) Assess the vertical and lateral extent of soil containing hydrocarbons beneath the <br /> building adjacent to the former tank excavation by drilling and sampling soil borings <br /> 2) Deepen and expand the excavation(overexcavate)to remove as much of this soil <br /> kR as possible, without affecting the building. Soil samples obtained while excavating <br /> --___-- _-_- -. ----_-._-- <br /> will-b _.analyzed_ta verify._removal-of_soil_containing.hydrocarbons_-_-_----—------ <br /> ._.___-- ---:..---------------- -_ _-_--- <br /> F <br />