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r' <br /> OUZ <br /> i <br /> 7jA <br /> k There is no source of saturation and hydraulic head on the site at <br /> this time, nor will there be in the foreseeable future. Further- <br /> more, given the relatively low permeability of the clay-.rich soils <br /> beneath the site, as interpreted from the water well drillers log, <br /> there would be only limited fluid transport through the soil <br /> column, even if there was a hydraulic head above the site. <br /> 7.0 Recommendation for closure <br /> The . LUFT leaching potential analysis, the STLC action level <br /> criteria and. the hydrogeological conditions on the site all <br /> indicate that site closure would have no adverse impact on the <br /> e14 health or safety of humans or the environment. Therefore, WESTON <br /> recommends closure of the site. <br /> The existing soil .stockpiles should be utilized to backfill Pits A <br /> a and 8 to the existing surface grade and both excavation locations <br /> + should then be repaved with asphalt. <br /> Gi - <br /> I : <br /> fs <br /> E.a <br /> n1 <br /> i <br /> 1 <br /> i <br /> x <br /> - 9 - <br />