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a. Coca-Cola Enterprises-West <br /> LTSTEC Job No. 90054.00 <br /> The field work for the CAR was completed in September 1990. Based an the results of USTFC's <br /> contamination assessment, the following conclusions were reached: <br /> Mo The soils beneath the Coca-Cola site in the area of the former 1,000-gallon <br /> gasoline UST were contaminated with petroleum hydrocarbons as diesel and <br /> i gasoline above concentrations requiring remediation as defined in the California <br /> LUFT Manual. <br /> # -- o The sails beneath the Coca-Cola site consist of an alluvial sequence of interbedded <br /> sand,silts,and clays. The aquifer material is primarily sand and is located about <br /> 65 to 70 feet below land surface. <br /> o The groundwater beneath the Coca Cala site has been contaminated with minor <br /> amounts of petroleum hydrocarbons. Hydrocarbon concentrations,however,may <br /> be low enough to warrant a monitor only approach. <br /> at the site appears to be towards the northeast. <br /> a The groundwater flow direction <br /> 0 <br /> r Based on the results of the investigation, USTEC recommended the following actions: <br /> o At least orte a di i nal downe adient MOULWan&mell should be installed and <br /> sampled. <br /> o Groui,dwater monitoring and sampling should continue on a quarterly basis to <br /> monitor potential contaminant migration and to provide verification of any <br /> remedial measures implemented at the site. Groundwater samples should be <br /> i, analyzed for total petroleum hydrocarbons in accordance with EPA method 8015 <br /> modified for diesel and gasoline. In addition, all groundwater samples should <br /> be analyzed for the aromatic hydrocarbons; BTEX in accordance with EPdA <br /> method 8020. H�9carbon congyDLMLtit?ns n he <br /> _2Da n watt-rarQminor an <br /> DQUIRRear to warrant remediation at this tiro <br /> o A Remedial Action Plan (RAP) should be prepared for the soil beneath the site. <br /> The RAP should include at least sig s to further quantify the <br /> around the former 1,000-gallon gasoline UST location. <br /> hydrocarbon contamination <br /> At least four of these borings should be converted to vapor extraction test wells. <br /> A vapor extraction pilot test should be conducted to assess the feasibility and aid <br /> i <br /> in the design of a soil remediation system. <br /> s <br /> a _ 4 <br /> r r.f <br />