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Environmental <br /> Resources <br /> Management <br /> 1 1777 Botelho Drive <br /> Suite 260 <br /> 3 NV —5 A,-'i 10 44 Walnut Creek,CA 94596 <br /> 4 November 1998 (925)946-0455 <br /> (925)946-9968(Fax) <br /> Mr Harlin Knoll, Senior REHS <br /> Public Health Services <br /> San Joaquin County <br /> Environmental Health Division <br /> 304 East Weber Avenue, Third Floor Ei RM o <br /> Stockton, California 95202 <br /> Subject Additional Investigation Activities <br /> Former Heinz Facility, Tracy, CA <br /> Dear Mr Knoll <br /> On behalf of Heinz USA (Heinz), ERM is pleased to subnut this <br /> workplan for additional investigation activities at the former Heinz <br />• Production Facility in Tracy, California (the site) This letter includes the <br /> scope of the proposed investigative activities and a schedule for the <br /> completion of these activities <br /> BACKGROUND <br /> Two UST's were removed at the site on 18 February 1998 After <br /> removing the two USTs, ERM removed contaminated soil from each UST <br /> excavation and pumped ground water from each excavation ERM also <br /> conducted a soil (Geoprobe) and ground water (Hydropunch) <br /> investigation in the areas surrounding each former UST location to <br /> characterize the extent of chemical impact to soil and ground water This <br /> work was conducted under the direction of the San Joaquin County <br /> Public Health Services, Environmental Health Division(County) The <br /> results of the UST removal and subsequent soil and ground water <br /> investigation and removal activities were summarized in Underground <br /> Storage Tank Removal Activities at Former Heinz Facility, 757 EIeventh Street, <br /> Tracy, CA (ERM, 22 May 1998) <br />• Following the completion of the tank removal and investigation <br /> activities, ERM installed a monitoring well downgradient of each former <br /> UST location These two wells (MW-1 and MW-2) were installed <br /> downgradient of the two former UST locations to monitor the presence <br /> of residual chemicals present in ground water following removal of the <br /> tanks and associated impacted soil and ground water In lieu of the three <br />