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Wt <br /> kr <br /> J. H. KLEINFELDER&ASSOCIA E E$ <br /> File: W-2006-1 <br /> March 18, 1956 <br /> Page 11 <br /> physical/biological methods, and reintroduced into the <br /> infiltration wells for both flushing and creating a <br /> hydrodynamic barrier at select points. <br /> - o Excavation of the soil containing hydrocarbons would <br /> require the removal of the soil sixteen to thirty two feet <br /> in an area approximately forty feet by forty feet. <br /> Removal of the sandy soil would require extensive shoring <br /> of the work shed, champagne tank foundation and the <br /> northern property edge. If hydrocarbons are present in <br /> _ the soil beneath the shed, it would not be possible to <br /> excavate these soils. At this time the removal of <br /> hydrocarbon contaminated soil by means of excavation would <br /> not be feasible or cost effective. Additionally, ground <br /> water remediation would still be necessary at an <br /> additional cost. <br /> _ o Four additional ground water monitoring wells should be <br /> installed to assess the extent of benzene migration in <br /> the ground water. This information is necessary to design <br /> a remedial system. Possible locations for the additional <br /> monitoring wells are shown on Plate 2-4. <br /> _ o All existing monitoring wells should be resampled and <br /> analyzed for BTR components at the same time any <br /> additional._.we1.1s.._are._.sampled._.and__anal.yzed._._._.Thi s__round.._cf— <br /> analyses should include major ion analyses on a select <br /> number of samples. <br />