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Lodi Ready Mix Page 3 <br /> Site Closure Report <br /> Appendix D <br /> May 12,1995 <br />' 8) Zone of influence of the remedial action was defined by the finished <br /> dimensions of the excavation and confirmed by sampling. <br />' 9) The excavation activity was successful in removing most of the <br /> contaminated sediments as indicated by the confirmation samples. The mass <br /> balance performed in item 6 indicates that only a slight amount remains. <br /> 10) Conditions at the site include a concrete pad over the former UST <br /> excavation area which will prevent surface water from percolating down <br /> through the remaining impacted sediments. Furthermore there exists at least <br /> a 15 foot buffer between the impacted sediments and the highest known <br />' instance of groundwater. Negative pore space capillary pressure will most <br /> probably prevent downward migration as the remaining impacted sediments <br /> are several orders of magnitude below saturation levels. <br /> 1 <br /> Ipt <br /> 1 <br />