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OVER-EXCAVATION & DEWATERING WORK PLAN_ { <br /> - - Di'.Salvo.Truck Lines <br /> 1100 Ventura.Avenue _ <br /> aR <br /> Stockton, California. JUIV <br /> 1, <br /> San Joaduin County _ . 199; <br /> = ENV!!?pNM�M <br /> Prepared by PERMFt/Sl AL Nt q . <br /> _ i - _ = _ - <br /> ,. RVlC6S <br /> CONDOR EARTH TECHNOLOGIES,-INC. <br /> June 21, 1995 <br /> 1.0 INTRODUCTION <br /> This work plan describes a'pro}�osed over-excavation and dewatering-to-be performed <br /> at the Di _ .. <br /> Salvo Truck Lines property located at 100 Ventura Avenue in Stockton-California (Figure 1). The <br /> - purpose of the over-excavation and dewatering.-is-to:remove'diesel contaminated soil andgroundwater. <br /> -- <br /> associated with 2.underground storage tanks(USTs)-formerly located at"the site :The work plan includes <br /> a brief.site background and the proposed_seope'of work' The work plan has.been prepared by Condor <br /> z Earth;Technologies Inc_-(Condor) at the request-of Mr =Keith Tallia of Oil Equipment Service (OES). <br /> C2.0 SITE BACKGROUND - <br /> 21 Tank Removal - TK1 <br /> In October,'.19 87, one 5,000.gallon diesel UST (TK1)-was removed from the Di,Salvo site:'_,The <br /> former location of TK1 is shown or"Figure,2,' Appendi-k A A_representative from-the San:Joaquin <br /> County Public Health Services,.Environ mental Health Department (SJCPHS,EHD) was-on site to select <br /> L - <br /> sample locations and identify the requi- d:laboratory analyses A representative from°Kleinfelder and: M <br /> Associates.(Kleinfelder) was on site to collect soil samples and:make field'observations.-One soil:sample <br /> was collected::from-beneath the fill, or.south end, of TKl at a depth of approximately 15 feet below the <br /> F <br /> _ ground surface (bgs).' Laboratory analyses detected.130 mg/kg diesel:in the soil.sainple.=No other <br /> hydrocarbon constituents were detected at or above the reported laboratory defection'limits. <br /> 2.2 Over-excavation <br /> Atthe direction ofthe.SJCPHS,EHD,_the fill end of TKI was over-excavated in December, 1987; <br /> to, - .>.. <br /> approximately 21 feet bgs: Klemfelder was on site to collect soil'samples and make field_observations, <br /> One soil sample was collected from the floor of the over-excavation:= The soil-sample was very moist, <br /> 7. <br /> :7.P 4 <br /> L Jr- CONDOR <br />