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i-'- . ." — - 3. <br /> -.iE=_ - MIMI <br /> . tea, . <br />_,,µ "�'.. TV. a ', ... 4. F N u ?a bw.'+.: �. _ .Y$E.F ,-GC• <br /> d <br /> 2.0 BACKGROUND TECHNICAL DATA <br /> M 2.1 Name and address of contact person: <br /> Contact Person: Mr. Ron Walker <br /> Wiggins and Associates <br /> 850 W. March lane <br /> Stockton, CA 95201 <br /> 2.2 Map showing site location, relative tr) nearby landmarks: <br /> The site location is shown on Figure 1. <br /> Is <br /> 2.3 Site Plan <br /> A site plan is presented on Figure 2. <br /> 2.4 Layout of all tanks and piping systems proporly labeled for <br /> content: <br /> -- The former tank locations and existing pump islands are plotted <br /> on the site plan (Figure 2). <br /> j 2.5 Estimates of liquid quantity and Composition leaked: <br /> j <br /> . .' No estimate of the quanta <br /> uel leaked can be determined from <br /> existing information. Based oonfanalytical results, the hydrocar- <br /> bons detected in soils and groundwater a <br /> gasoline fuel. ppear to be derived from <br /> F 2.6 Topography, Geology, Hydrology/Hydrogeology <br /> 2.6.1 Topography <br /> The site is approximately 13 feet above mean sea level. The . <br /> topography in the site vicinity is level with a very mild sloped <br /> from east to west parallel to the channel. <br /> .r 2.6.2 Geology <br /> The site lies 1:n the eastern portion of the Sacramento--San Joa- <br /> quin Delta. The subsurface geology in the Stockton area is <br /> characterized by Plestocens and recent _al luvial.--deposits.---These ------- <br /> consist-of hetaro eneous sequences of sands and -- --- -- <br /> gravels by active stream channels, and of silts and Clays of <br /> overbank and ' <br /> r paludal origin. - <br /> 2 <br />