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' Del Monte Foods -5- March 9, 2009 <br /> f <br /> Claim 2612 <br /> • Contaminants remaining in the vadose zone cannot migrate in soil vapor <br /> or leach at concentrations that would cause groundwater to exceed water <br /> quality objectives. <br /> There are no existing water supply wells, surface waters or other <br /> receptors threatened by the remaining contaminants in soil or <br /> groundwater. <br /> Pollutants remaining in groundwater do not create or threaten to create <br /> risk to human health and safety, or to future beneficial use(s) of the <br /> groundwater. <br /> The plume size is stable and sufficiently delineated in lateral and vertical <br /> extent and contaminant concentrations detected in groundwater show a <br /> decreasing trend with time. <br /> In summary, the remaining mass of hydrocarbons in soil and groundwater is <br /> minor, the extent of contamination is defined, the groundwater plume is shrinking, <br /> and Water Quality Objectives will be achieved in a few years. <br /> f UPDATED, March 2009: The Fund continues to recommend that the <br /> "San Joaquin County LOP consider this site for closure. Further investigation at <br /> this site is unlikely to benefit the people of California. <br /> Kirk Larson, P.G. Date Robert Trommer, C.H.G. Date <br /> Technical Review Unit Chief, Technical Review Unit <br /> (916) 341-5663- (916) 341-5684 <br /> i <br /> I <br /> I <br /> i <br /> California EnvironmentaiProtecdon Agency <br /> CJ Recyc%d Paper <br /> J " <br />