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y <br /> Environmental <br /> Resources <br /> Management <br /> " 1777 Botelho Drive <br /> Suite 260 <br /> j Walnut Creek,CA 94596 <br /> p'f 12 J <br /> 22 January 1999 (925)946-0455(925)946-9968(Fax) <br /> Mr Harlin Knoll, Senior REHS <br /> Public Health Services <br /> San Joaquin County <br /> Environmental Health Division ERM, <br /> 304 East Weber Avenue,Third Floor <br /> Stockton, California 95202 <br /> Subject Investigation Workplan <br /> Former Heinz Facility, Tracy, CA <br /> Dear Mr Knoll <br /> On behalf of Heinz USA (Heinz), ERM is pleased to submit 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 USTs were removed at the site on 18 February 1998 After removing <br /> 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 Iocation 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 Eleventh Street, <br /> Tracy, CA (ERM, 22 May 1998) <br /> . Following the completion of the tank removal and investigation <br /> activities, ERM, at the request of the County, installed three monitoring <br /> wells at each former UST location ERM has collected ground water <br /> elevation measurements and performed sampling in the monitoring <br /> wells for total petroleum hydrocarbons as gasoline (TPH-g),benzene, <br />