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® Engineers <br /> Planners <br /> ~r Economists <br /> Scienirsts <br /> August 11, 1995 <br /> 102429.AS.T8 <br /> Mr. Soon Kim <br /> Del Monte Foods <br /> P.O. Box 9004 <br /> Walnut Creek, CA 94598-2458 <br /> Re: Quarterly Monitoring Results, Disco Site, 110 N. Filbert, Stockton, CA <br /> Dear Mr. Kim: <br /> This letter report summarizes quarterly monitoring results and remediation progress based on <br /> t observations, measurements,and analytical results from field work completed in July and <br /> August 1995. <br /> Background <br /> The Disco site, located near the intersection of Myrtle Avenue and Filbert Street in Stockton, <br /> California, is the location of three former 10,000-gallon gasoline tanks that released gasoline <br /> constituents into the soil and groundwater (Figure 1). The Disco property and tanks are <br /> associated with a former gasoline station that was owned by Parmaceast from the mid-1960s <br /> to 1976. Del Monte purchased the Disco property from Parmaceast on April 1, 1976; <br /> however,Del Monte never operated or utilized the Disco tanks. <br /> As directed by PHS/EHD in 1985,Del Monte removed the Disco tanks and discovered that a <br /> release of gasoline had occurred from the Disco tanks. At the time of removal,the Disco <br /> tanks contained water. Soil beneath the tanks was analyzed and found to contain gasoline <br /> constituents. Soil containing the gasoline constituents was aerated on-site to reduce levels of <br /> volatile hydrocarbons. The aerated soil was backfilled into the excavation. The results of the <br /> tank removal are presented in Del Monte's Tank Excavation Report(Exceltech, 1985). <br /> CH2M HILL 1 I I I Broadway,P.O.Box 12687,Oakland,CA 94604-2687 510257-2426 Fax 510893-8205 <br />