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£ ..54 +Y• 4 <br /> UIMMMt�' - '•Y' 'i °- .,vAm <br /> S"V <br /> a <br /> SO;L REMEDIATION PROPOSAL <br /> TEXACO SERVICE STATION <br /> 440 WEST CHARTER WAY <br /> STOCKTON,CALIFORNIA <br /> September 11,1991 <br /> 1.0 INTRODUCTION <br /> Prepared to propose the Installation of four nested vapor extraction wells NEWS) <br /> This work plan was preps p p { Appendix A). <br /> California(Figaro�, <br /> at the Texaco seay,Sloe <br /> rvice station located at 44U emed a e hyo hydrocarbon itmpacted soils beneath the operating <br /> The nested VEWs are being proposed <br /> service station. This work pian was requested by the San Joaquin County Environmental Health Division <br /> and is authorized by Texaco Environmental Services. <br /> i <br /> 2.0 BACKGROUND <br /> rilled <br /> Fifteen soil borings and one angio boring have been dTab 1 (Appendix e) presents <br /> A). A total of 79 soli samples were analyzed by a state-certified laboratory. <br /> the results of these analyses. eased on the analytical results of Soil samplenortheast om�llof the property.from the borings. <br /> Issnnot <br /> hydrocarbon impacted soils beneath the site are confined to the rther subsurface exploration is not feasible <br /> known how far the impacted soil extends tawwd Charter Way The Impacted <br /> ermit <br /> since Charter allay Is State Route 4f 15 Cal bre ow groundans will not psurfaceo(BGS)anTIngs In id extend ito ha water table at <br /> soils are encourAcred at a depth of 15 to rade to a fine Spry <br /> approximately 39 feet BGS. These soils consist of clays from <br /> tBGS generalized geologic cross <br /> sand at depths be1a�N 30 feet BGS. Figuresro3 ma a (Appendix <br /> of adsorbed hydrocarb <br /> pnendixA) pressons. The volume of <br /> sections of the subsurface Bolls and the app <br /> impacted soil has been estimated at approximately 3,000 cubic yards with average concentrations of • <br /> pa its per million(ppm). Assuming a soli density <br /> adsorbed hydrocarbons ranging between Soo and 1,000 pa p <br /> of 2,900 pounds per cubic yard,the weight of hydrocarbons In the soil is between 4,350 and E3,7U0 pounds. <br /> i GF OUN1)%VATFR <br /> Tk(IINOIDGY,INC. <br /> D075costmo <br />