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r. P <br /> Del Monte Foods �`'` -5- May 4, 2009 <br /> Claim 2612 <br /> 4� <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,concen_trations detectedin.groundvwater_show.a.T. . <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, f <br /> and Water Quality Objectives will be achieved in a few years. I! <br /> UPDATED, March 2009: The Fund continues to recommend that the San <br /> Joaquin County LOP consider this site for closure. Further investigation at this <br /> site is unlikely to benefit the people of California. <br /> UPDATED, April 2009: The San Joaquin County LOP has directed the <br /> Responsible Party to define the extent of contamination northeast of the site. I <br /> The Fund concurs that additional site definition be conducted and will review this <br /> site in six months to track progress. j <br /> i <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 /> Ci Recycled Pape, <br />