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Mr. Ted Knowles <br /> February 6, 1989 <br /> 202/799--5027.04 <br /> PROPOSED WORK PLAN <br /> ^' GTI proposes the following work steps for the installation of <br /> :_j <br /> the soil vent system (SVS) at the former Knowles Gas Station: <br /> 3` <br /> ! j <br /> - Contact the SJLHD, the San Joaquin Air Pollution <br /> Control District (SJAPCD) , and the City of Stockton j <br /> to obtain the appropriate drilling permits, <br /> _ temporary air discharge permits, and building <br /> -i permits, respectively (as required) . <br /> 1 ; <br /> Drill four 10 1/2-inch diameter boreholes (45 feet deep) ' <br /> for subsequent installation of vapor extraction wells i <br /> (figure 9) . <br /> Store contaminated soils generated during the drilling <br /> process in approved Department of Transportation (DOT) . <br /> i <br /> " containere. for disposal at a later date. <br /> t <br /> } c <br /> i <br /> Install and complete 4-inch diameter vapor extraction <br /> wells within the soil borings, the wells will be { <br /> �t <br /> constructed as shown in Figure 10, <br /> A <br /> j . <br /> Excavate trenches to provide electrical service and <br /> i <br /> manifold the vapor extraction wells to the central <br /> �1 vacuum unit. <br /> �J Backfill trenches and resurface with asphalt to grade <br /> ykk (if required) <br /> � r <br /> �s Install one high-vacuum blower unit .with six manifolded ' <br /> Lai'1 r <br /> carbon vessels (if needed) to treat extracted vapors <br /> I . . <br /> prior to atmospheric discharge. : <br /> H MEN <br /> i J <br /> f <br /> L � of <br />