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ism <br /> 6 <br /> KLEINFELDER <br /> 4 KKCAvATION WATER MARACrffitIZATIDN <br /> During the removal of the two underground fuel tanks, a pit approximately <br /> 12 feet deep was created. After excavating, ground water stabilized in <br /> the pit at approximately 6 feet below ground surface. In order to remove <br /> g soil and to install the new fuel'tanks, water must be.removed from the <br /> excavation. Kleinfelder has assessed . this water and is attempting to <br /> obtain permission from the City of Tracy to discharge the water into <br /> city sewer system. the <br /> i <br /> r;. On April 20, 1988 <br /> j , a water sample was collected.from the excavation.and ' <br /> c� submitted under chain-of-custody to Cheswest Analytical Laboratory, Inc. <br /> ' The .water sample was analyzed for TPH extractable by GC=PID and BTEX by. <br /> �} <br /> EPA Method 602• Results.of the analysis indicate a TPH concentration of <br /> E 1.5 mg/1. The BTEX concentrations are belo <br /> limitsw the laboratory's reporting <br /> 'I . <br /> L� copy of the chain-of-custody and laboratory data sheets are <br /> Y <br /> enclosed. <br /> }J Currently. . no state he t <br /> r alth standards exist for total petroleum hydrocarbon <br /> ` �� cancentrati <br /> ons in water. : <br /> .i It is Kleinfelder's understanding that low F <br /> r <br /> levels of petroleum ' hydrocarbons have been released into the sanitary � . <br /> sewer systems in Lodi, Manteca,- Stockton,- Rocklin -and West-Sacramento: <br /> f <br /> Kleinfelder has21 <br /> . notbeen notified nor:.aware.of any adverse affects from <br /> the releases. into the above cities sanitary sewer <br /> systems. <br /> f' <br /> R <br /> 142-88-638 6 <br />