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CAMBRIA <br /> 1U• <br /> April 26, 2001 <br /> Mr Harlin Knoll <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, California 95202 , (� <br /> Re Site investigation Work Plan <br /> Shell-branded Service Station IJ <br /> 3725 Tracy Boulevard <br /> Tracy, California <br /> SAP Code 136186 <br /> Incident No 98996222 <br /> SJCPHS/EHD Site Code 1417 <br /> Dear Mr Knoll <br /> Cambria Environmental Technology, Inc (Cambria) prepared this work plan on behalf of <br /> Equiva Services LLC (Equiva) in response to San Joaquin County Public Health Services, <br /> Environmental Health Division's (SJCPHS/EHD) March 15, 2001 letter The scope of work <br /> presented in this work plan is written to comply with SJCPHS/EHD and Regional Water <br /> Quality Control Board (RWQCB) guidelines <br /> SITE BACKGROUND <br /> Site Description The subject site is located on the northwest corner of the intersection of <br /> Tracy Boulevard and the west bound onramp to Interstate Highway 5 in Tracy, California <br /> The site is an operating Shell-branded service station with four underground gasoline storage <br /> tanks, six dispenser islands, a station building, and a carwash (Figure 2) The site was <br /> developed as a service station in 1967 when an 8,000 gallon underground storage tanks (UST) <br /> and a 10,000 gallon UST were installed at the site In 1970 an 8,000 gallon UST was <br /> installed for a total of three USTs at the site <br /> An operating Chevron service station is located north of the subject site The Chevron <br /> station is an open environmental case and has monitoring wells on site (Figure 2) A former <br /> Oakland, CA Unocal service station was located northeast of the subject site and is not an active <br /> San Ramon CA <br /> Sonoma CA environmental case <br /> Cambria Previous Investigations <br /> Environmental <br /> Technology,Inc <br /> During October 1985, J H Kleinfelder & Associates drilled four soil borings in the vicinity of <br /> Perkins Street the USTs Petroleum hydrocarbons (presumed to be gasoline related) were detected with a <br /> P 0 Box 259 <br /> Sonoma,CA 95476 <br /> Tel(707)935-4850 <br /> Fax(707)935-6649 <br />