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L ' <br /> Environmental <br /> Resources <br /> ! Management <br /> i' 1777 Botelho Drive <br /> Suite 260 <br /> A UG 15 PH 1 0 1 Walnut Creek,CA 94596 <br /> 11 August 2000 (925)946-0455 <br /> (925)946-9968(Fax) <br /> Mr Harlin Knoll ENVIRONMENTAL HEALTH DIVISION <br /> 304 E Weber Ave Third Floor <br /> Public Health Services P O Box 388, Stockton CA 95201-0388 <br /> San Joaquin County Approved <br /> Denied <br /> 304 E Weber Avenue, Third Floor Conditions t o's u�.• Ys �5 ea u^- ��,� <br /> Stockton, CA 95201-0388 1,, -fik d ERM.� <br /> Date n o by T,,,RM®r 11 <br /> Subject Monitoring Well Installation and Sampling Activities <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 performing monitoring well installation and sampling <br /> activities at the former Heinz Production Facility in Tracy, California (the <br /> site) This letter includes the scope of the proposed work and a schedule <br /> for completion of the investigation activities <br /> BACKGROUND <br /> On behalf of Heinz, ERM submitted the Underground Storage Tank Closure <br /> Report to the San Joaquin County, Public Health Services, Environmental <br /> Health Division (County) on 7 April 2000 After reviewing this report, <br /> the County provided a letter dated 15 June 2000 to Heinz requesting <br /> additional investigation activities at the site In their letter, the County <br /> stated that the vertical depth of total petroleum hydrocarbons as gasoline <br /> (TPH-g) and benzene, toluene, ethylbenzene, and xylenes (BTEX) in <br /> ground water has not been determined at two former underground <br /> storage tank (UST) locations at the site The County requested that a <br /> monitoring well screened from 30 to 35 feet below ground surface (bgs) <br /> be installed, developed, and sampled at each former tank location <br /> In a letter to the County dated 12 July 2000, ERM indicated that the <br /> installation of additional monitoring wells was unnecessary for the <br /> purpose of defining the vertical extent of ground water impacts at the <br /> site ERM instead proposed the installation of hydropunch samples at <br /> _ each former tank location to define the vertical extent of ground water <br /> impacts In response to this letter, the County prepared a letter dated 7 <br /> August 2000 In the letter, the County reiterated their request to have an <br />