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A <br /> t ' <br /> C A M B R I A <br /> August 26, 1999 <br /> Mr Ronald Rowe R M <br /> San Joaquin County Public Health Services <br /> Environmental Health Division AUG 3 0 1999 <br /> 304 East Weber Avenue <br /> rd <br /> 3 Floor LI`41VIRUIV�,It_lti H <br /> Stockton, California 95201 PERMIT / SERVICES <br /> Re Site Investigation Work Plan <br /> Texaco-Branded Service Station <br /> 440 W Charter Way <br /> Stockton, California <br /> SAP 121258 <br /> Incident 88870583 <br /> SJCPHS Site Code 1055 <br /> Dear Mr Rowe <br /> As you requested, Cambria Environmental Technology, Inc (Cambria) is submitting this Site <br /> Investigation Work Plan to define the extent of hydrocarbons in soil and groundwater at the site <br /> referenced above This work is being conducted on behalf Equiva Services LLC Presented <br /> below are the site background including current site conditions, and our proposed scope of work <br /> to complete this investigation <br /> SITE BACKGROUND <br /> The following site history summary is based, in part, on a Site History Summary prepared by <br /> Secor International dated August 7, 1998 The site is an operating Texaco Service Station in a <br /> mixed residential and commercial area of Southern Stockton The land surface slopes gently <br /> towards the San Joaquin River, which is about 1 5 miles south of the site Texaco began retailing <br /> gasoline at the site in about 1960 and closed the facility in December 1998 The underground <br /> storage tanks (USTs)were removed in July 1999 <br /> Oakland CA <br /> Sonoma CA 1988 Dispenser Removal: In October 1988, two dispenser islands were removed Soil beneath <br /> Portland OR the eastern island was excavated to 15 feet below grade (fbg) to remove hydrocarbon-beanng <br /> Seattle WA <br /> soil Total petroleum hydrocarbons as gasoline (TPHg) were detected at the bottom of the <br /> Cambria excavation at 5,300 mg/kg Benzene was also detected in the excavation bottom sample at 31 <br /> Environmental mg/kg Soil analytic data is summanzed in Attachment A <br /> Technology, Inc <br /> 044 65th Street <br /> Suite B <br /> Oakland CA 94608 <br /> Tel (510) 420-0700 <br /> Fax(510) 420-9170 <br />