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III. Soil Remedlation Information <br /> Soil remediation method(sl. excavation removal and thermal tree en <br /> Volume treated and/or removed al2proximately 4400'-tons <br /> � <br /> Contaminated Soil disposal.site Port, Costa and. f=orward Landfill <br /> If contamination is remaining, describe-concentrationrange-and volume (cubic•yards.or. <br /> meters) <br /> Soil excavated to 36 feet. Conformation sampling revealed and 'detectable . � <br /> concentrations of TPH. - <br /> Usximum documented contaminant concentrations in soil before and after ctesnup <br /> Contaminant Method Before Altar Depth Contaminant Method- Before i-Attar Depth w <br /> GY used (mp/kQ)" (mglkg) (ft) used (rrtglkQ) (mg/kg)' # (ft) <br /> TPH(Gas)' 8020' 7200 ND `36 Benzene 8020 3.30 .. ND ' 36 A <br /> TPH (DieselY 8015m 8500 ND 36 'Toluene 8020 350 ND e 6 <br /> Other fuel a - ...� <br /> y Ethylbenzene ? 8020 .190 ND 36 <br /> Heavy metals i . # t.., . Xylene.: , 8020 1100 J ND 36 <br /> Other - other <br /> IV. Groundwater Remediation information - <br /> Groundwater remediation method(s), - None <br /> Volume3 <br /> treated and/or removed � None <br /> If contamination is remaining, describe concentration range and volume (gallons or liters) <br /> Li <br /> �.Y. <br /> Table W-' documented contaminant concentrations in groundwater before and after cleanup <br /> Contaminant y„- .. Method Befores <br /> :. Afierw-., -y�pthr;� Ccrdaminant Method Before After 'Depth r <br /> used (mom (mg (ft) used (mall) (mg)') (ft) <br /> TPH (Gas) s Benzene~ <br /> 4 ] <br /> TPH (Dieseq <br /> } t Toluene <br /> Other fuel ...�..� ,�. :-�. ... . , <br /> Ethyberizene <br /> Heavy metals.-. F i <br /> Other <br /> Other i A. .�. r .' t <br /> V. Closure <br /> - w <br /> Does Regional Board concur with closure? Yes „ <br /> No <br /> Rationale for. clo_sul-0 Tanks-removed,' 4,400 `.tons'-of'soil• removed and disposed:'”` Trace,, ~' <br /> concentrations'-of TPH CAS/BTEX in well closest tformer aY <br /> discussion' in,. S i _Clean <br /> • <br /> well located 1500 feet northwest of ropert.y, <br /> _ clean mn itgung w-f-Al <br /> between the former tank pit and the well. <br /> Location of re orts <br /> - _p _ on file (AgencylRoom:} - <br /> County 'San Joaouin" ; _ ' �" Staff, <br /> 3 person Phone., 2()9-4 45W <br /> Regional Board office Staff person '�' �9. Phone <br /> SEI <br /> E <br /> R Cneklrst wp 29 June 1994 �= y +` <br />