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5.4 Waste Management <br /> Hydrocarbon impacted dnll cuttings will be stored on site, covered and underlain with plastic A <br /> sample of these soils will be analyzed for waste characterization Proper disposal procedures will be <br /> Po <br /> dependant on laboratory analyses Drilling augers will be steam cleaned prior to drilling the next <br /> boring All rinsate and purge water will be contained in DOT approved drums and left onsitendin <br /> Pe g <br /> laboratory analyses If sample results indicate concentrations below State MCLs, discharge of water <br /> ! to the ground surface is proposed <br /> ! 6.0 REMEDIATION INTRODUCTION <br /> Remediation alternatives for soil contamination at the site were evaluated according to type of <br /> contaminant, i e , gasoline or diesel Diesel contamination exists in the former locations of both the <br /> ' diesel and waste oil tanks on the northeastern portion of the property <br /> Gasoline soil contamination exists on the west-southwest portion of the property from the former <br /> gasoline tanks and the associated dispenser island <br /> Two separate remediation alternatives, one for each above contaminant areas, are discussed in the <br /> following sections <br /> ' 7.0 EVALUATION OF REMEDIATION ALTERNATIVES - GASOLINE <br /> To examine and evaluate alternatives for the gasoline hydrocarbon impacted soil, four remediation <br /> approaches were reviewed A no-action alternative has been determined to be unacceptable for this <br /> site based on a General Risk Appraisal performed in accordance with the Californta LUFT Manual <br /> ' (1988)) Therefore, only three remediation approaches for the gasoline hydrocarbon impacted soils <br /> were considered These include, (1) excavation of the gasoline impacted soils followed by on-site <br /> ' treatment, (2) excavation of the hydrocarbon impacted soils followed by disposal to an appropriate <br /> solid waste facility, and (3) in-situ removal of hydrocarbons from the affected area using vapor <br /> extraction techniques The three remediation alternatives were evaluated according to the following <br /> ' criteria <br /> R 042992 TIL 10 <br />