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stockpiled soils This data suggests that alternative methods of handling the stockpiled soils and <br /> addressing the remaining hydrocarbon impacted soils in the excavation area should be pursued <br />' to determine if the soils can simply be removed rather than resorting to the time consuming <br /> installation and operation of a SVE system <br />' Therefore, it is proposed to place the original concept of the SVE installation on hold and pursue <br /> the course of action listed below <br />' • Continue with quarterly monitoring of all six monitor wells (five wells onsite and one <br /> offsite) Analyze the samples per San Joaquin County EHD program except for the <br /> requirement for total lead and fecal coliform analysis Pecause of the highly variable <br />' ground chemical concentrations observed in all wells at in the past, it wou d <br /> be emature o consider additxon�fsuw—well_ms southeast at <br /> thi is not recommended to continue total lead and fecal coliform analysis as the <br />' data is not contributing to further development of the remedial program <br /> Collect soil samples from the core of the existing soil stockpile to ascertain if the entire <br />' stockpile character is similar to the previously acquired data from the shallow soil <br /> samples <br />' O Excavate and stockpile separately the soil from the vicinity of sample location S-2 in the <br /> tank excavation area which showed the presence of hydrocarbon concentrations and <br /> resample soil beneath the newly excavated area It should be noted that removal of soil <br /> during this effort could jeopardize the stability of the soil supporting the existing building <br /> and result in uneven settling of the building <br />' If the impacted soils remaining in the excavation area are successfully removed, the <br /> excavation would be backfilled with clean soil and the area restored to existing grade <br />' Handling and disposal of the excavated soils would be completed according to the <br /> concentrations of hydrocarbons found in the soils. <br />' If the previously stockpiled soils are found to be free of elevated hydrocarbon <br /> concentrations, the soils will be used ether as fill for the tank excavation area or will be <br /> used elsewhere as fill If hydrocarbon concentrations remain above a level of concern <br />' by the County, handling and disposition appropriate to the level of hydrocarbons <br /> remaining will be arranged <br />' The details of this revised remedial outline are discussed in the following sections <br /> 3.2.1 Additional Stockpile Sampling vv�VVj\ G <br />' The stockpile of soils is approximately 12 feet wide, 40 feet long and 9 feet high A sample <br /> PP Y <br /> program will be conducted to take samples of the interior of the pile to assist in characterizing <br /> the nature of the entire stockpile Sampling of the core of the stockpile will be accomplished <br /> 6,1 by boring into the side of the stockpile approximately 3 feet above the base at three locations <br /> and retrieving samples from approximately 4 feet into the pile Additionally, one sample will <br />' be retrieved from a separate boring at a "depth" sufficient to be at the center of the pile To <br />' S17 MPmAREG3QTR WP 11 11i13 <br />