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WORK PLAN FOR ADDITIONAL SITE ASSESSMENT <br /> TEXACO SERVICE STATION <br /> 440 VIEST CHARTER WAY <br /> S i OCKTON,CALIFORMA <br /> September 12, <br /> i.o INTRODUCTION <br /> This work plan.gas prepared to propose the additional assessment of subaurfeica conditions at the <br /> Texaco Earvico station located at 440 West Charter Way,St(3cktOn,California(Figure f1,Appendix A). The <br /> purpose Of the assessment h, to delineate the extent and the concentration of petroleum-based <br /> hydrocarbons in Iroundwater In the vicinity of the site. This work plan was wrNon at 111D request of the San <br /> Joaquin County,Public Health Services,EnvirallmoDW Health Division(SjrphS-EV;0)and compiles with <br /> he guidelines set jorlb by the Gaidonfla Regional %valor Quailly Control Board, Contral Val',OY Region <br /> (CRVVQGB-CVFt),and is authorized by Texa-,o EnVironm3nial Services. <br /> 2.0 BACKGROUND <br /> oil was obat he site o after two pump islands were <br /> In October IWO,by Impacted sail <br /> beneath one pump Island was exj,%vated to an <br /> re.1joved In preparation for new construtMon. Groundwater Technology re�:ponded to a <br /> approximate depth of 15 toot belaw ground surface (BGS). Gr <br /> , .7SsMt,.jj of the Subsurface <br /> to porform an envIrcilmontal assrequest by Te;(&Co Refining and Marketing,Inc., <br /> Soil and water conditions beneath the silo. monitoring wells to dGiermino the extent Of <br /> Groundwater TachnologY Installed eleven groundwater water samples collected <br /> the dissolved hydrocarbon plL..-no In the groundwater beneath the site. A'%alysls of <br /> from Itbaso wells during the last quarterly sampling round an August 9, 19,1)1 indicated that all of the wells <br /> tratlons Of petroleum hydrocarbons.Total petroleum hydrocarbons-as-gasolinO <br /> contained detociablo concen <br /> TrOANOLOGY,INC. <br /> 17WWKPLRPT <br />