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Site Closure Report 2 <br /> Former Claude C.Wood Construction Yard,681 East Lockeford Street,Lodi,CA November 16, 1999 <br /> 2.0 BACKGROUND <br /> 2.1 Site Setting <br /> The Site is located at 681 East Lockeford Street, in the City of Lodi, San Joaquin County, <br /> California approximately 500 feet east of Highway 99 (Figure 2). The Site is the location of a <br /> former Claude C. Construction Company Yard that lies on the northeast corner of the Lockeford <br /> and Beckman Road intersection(Figure 2). Claude C. Wood Company used the yard as an <br /> equipment fleeting and maintenance facility until 1992. As part of the operation three USTs and <br /> an above ground storage tank(AST) farm were used to store and dispense diesel fuel. In 1993 <br /> contractors performed primary demolition of buildings and other structures including the <br /> removal of the above ground storage tank(AST) farm located immediately west of the structure <br /> labeled 'Repair Shop" (Figure 2). The location of the former USTs and AST farm are shown on <br /> Figure 2. The Site is currently vacant with only four building foundations and a concrete loading <br /> dock remaining. <br /> 2.2 Geology and Hydrogeology <br /> The property is located approximately 2,500 feet south of the Mokelumne River at an elevation <br /> of 54 feet above sea level (Figure 1). Based on observations made during waste oil UST removal <br /> and soil excavation activities, the native soil from grade to 15 feet below grade surface (bgs) <br /> consisted of silty sand and sandy silts that were underlain by silty clays and clayey silts from 15 <br /> feet to a depth of 22 feet bgs. <br /> Groundwater monitoring data from an adjacent site has a seasonal high groundwater level of <br /> approximately 35 feet bgs. <br /> 2.3 UST Removals and Soil Excavations <br /> As part of the construction yard operation, a total of three USTs were once used at the subject <br /> site. The location of the former USTs are shown on Figure 2 and are described below: <br /> Volume Type Storage Status <br /> 12,000 gallon Steel UST Gasoline Removed January 1990 <br /> No further action following removal <br /> AJ-ClosureRpt.RPT.wpd <br />