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r � <br /> T <br /> i <br /> 1 <br /> December 11, 1991 492, Manteca, California <br /> Beacon Service Station No <br /> B8CKGROUND <br /> da Street as shown oil <br /> southeast corner of North I�ialn Street and Alanje10,000-gallon gasoline <br /> The site is on the so The station is in operation. Three <br /> Plate 1). western gasolilte tank and the <br /> the Site Vicinity Map ( building. The super unleaded <br /> storage tanks are northwest of the station <br /> eastern <br /> gasoline tank store unleaded gasoline. and the center tank stores sup <br /> gasoline. <br /> PaEVIO S.NVORK <br /> Previous work at the site <br /> 'Investigation <br /> included an initial subsurface en <br /> once to a failed precision leak test of a 10,00 <br /> Applied GeoSystems in resp ort No.86102-1). <br /> conducted b5lied GeoSYstems,December 16.19$6.Rep <br /> gallon pro duct-storagetank(App <br /> lie <br /> lined in place. During that investiration,three <br /> The product-storage tanks were subseq through ytW-3) were installed at the site and <br /> groundwater monitoring <br /> wells (MW collected <br /> hydrocarbon <br /> und-water samples were collected and analyzed te for cavity and <br /> selected soil and gro ation indicated that soil near <br /> compounds. The results of that investigation hydrocarbons of that exceeded <br /> water underlying the site contained concentrationsubsequent to that investigation. <br /> ground regulatory agencies. <br /> levels acceptable to State and local re or-e,�tractionwells <br /> (,VW-4 through VW-7)in the lank <br /> stems installed four vap ort Itio 86102-3)• According to <br /> applied GeoSy October 13, 1988,Rep Y <br /> cavity backfill (Applied GeoSystems.O <br /> Ultramar Personnel, por <br /> EVAX <br /> Technologies. Inc. of San Jose, California. cond17t�89 and <br /> remediation at the site from October 13, 1989,through November round-w iter <br /> extraction a locations of the g <br /> acted and treated aver 2,100 pounds of hydrocarbons. 'Ih <br /> extr wells are shown on the Generalized Site Plan,Plate <br /> monitoring wells and vaPor-extraciion <br /> 2). <br /> 2 <br />