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Environmental <br /> Resources <br /> 4 Management <br /> I 1777 Botelho Drive <br /> Suite 260 <br /> Walnut Creek,CA 94596 <br /> (925)946-0455 <br /> (925)946-9968(fax) <br />' 21 February 2001 <br />' Mr Harlin Knoll <br /> Public Health Services La <br />' San Joaquin County <br /> 304 E Weber Avenue, Third Floor IER ® <br /> Stockton, CA 95201-0388 <br />' Subject Ground Water Sampling Results <br /> Former Heinz Facility <br /> Tracy, California <br />' Dear Mr Knoll <br /> On behalf of Heinz USA (Heinz), Environmental Resources Management <br /> (ERM) has prepared this letter to present the results of ground water <br /> sampling conducted at the former Heinz facility (site) in Tracy, <br /> California <br />' Background <br /> On 7 April 2000, ERM submitted the Underground Storage Tank Closure <br /> Report to the San Joaquin County, Public Health Services, Environmental <br /> Health Division (County) This report requested that the two former <br /> underground storage tank locations at the site be closed Following their <br /> review of this report, the County requested that additional investigation <br /> activities be conducted at each former tank site In letters dated 15 June <br /> and 7 August 2000 the County requested that additional monitoring <br /> wells be installed to define the depth of ground water impacts at each <br /> former tank site <br /> I After correspondence with the County, ERM submitted a workplan for <br /> monitoring well installation and sampling activities on 11 August 2000 <br /> The workplan included installation of one monitoring well, screened <br /> from a depth of 30 to 40 feet below ground surface (bgs), at each former <br /> tank location The workplan also called for two rounds of ground water <br /> sampling to be performed in all site wells following installation of the <br /> new wells <br />