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CAMBRIA <br /> r;� 'ry,9t it <br /> 0 <br /> 01,j <br /> f r; <br /> a f? 3 7 October 22, 1999 <br /> Mr Steve Sasson <br /> San Joaquin County Public Health Services- <br /> Environmental Health Division <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, California 95202 <br /> Re Underground Storage Tank Removal Report 1 <br /> Former Texaco Service Station <br /> 440 West Charter Way <br /> Stockton, California <br /> SAP Code 121258 <br /> Incident No 88870583 <br /> SJCPHS-EHD Site Code 1055 <br /> Dear Mr Sasson 5 <br /> Cambria Environmental Technology, Inc (Cambria) prepared this report on behalf of Equiva <br /> Services LLC to document the underground storage tank (UST) removal at the above <br /> referenced site Cambria performed inspections and soil sampling following the removal of <br /> three gasoline USTs, one diesel UST, four fuel dispenser islands associated product piping and <br /> V vent lines, and subsequent over-excavation activities The work was performed to comply <br /> with San Joaquin County Public Health Services, Environmental Health Division <br /> (SJCPHS-EHD) and Central Valley Regional Water Quality Control Board (RWQCB) <br /> guidelines <br /> SITE BACKGROUND <br /> Site Description The site is currently a non-operating gasoline station located on the <br /> southeast corner of West Charter Way and Lincoln Street in a mixed commercial and <br /> residential area of Stockton, California (Figure 1) The site layout consists of a service <br /> station building, a car wash, two generations of former dispensers, and an excavated former <br /> UST complex (Figure 2) The land surface slopes gently towards the San Joaquin River, <br /> Oakland CA which is approximately 1 5 miles south of the site Texaco began retailing gasoline at the <br /> Sonoma CA site in the 1960s and closed the facility in December 1998 <br /> Portland OR <br /> Seattle WA <br /> Previous Investigations During October 1988, two dispensers were removed and soil <br /> Cambria impacted by petroleum hydrocarbons beneath the eastern dispenser was excavated to an <br /> Environmental <br /> Technology,Inc approximate depth of 15 feet below grade (fbg) Soil collected from the bottom of the <br /> excavation contained total petroleum hydrocarbons as gasoline (TPHg) at concentrations <br /> Perkins Street ranging from 3 to 5 300 parts per million (ppm) and benzene at concentrations up to <br /> P 0 Box 259 <br /> Sonoma CA 95476 <br /> Tei(707)935-4850 <br /> Fax(7o7)935-6649 <br />