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s <br /> _ <br /> i <br /> Recormnendations <br /> �. This section presents two options fol future action at the Steve' <br /> Rental site in Tracy California. The options are based on the <br /> EaCC environmental site assessment. <br /> results and findings of the T <br /> The options are: option #1 - Further subsurface investigation to <br /> more completely del- <br /> option <br /> the lateral and vertical extent of <br /> contamination. Option #2 - Remediation of soil and groundwater in <br /> the former waste oil tank area, based on existing data. Each <br /> e discussions are followed by an <br /> option is discussed below. Th <br /> evaluation of the options and TE;CC's Recommendations for future <br /> action. <br /> OPTION #1 - ADDITIONAL SUBSUA�•'ACE INVESTIGATION <br /> E The first option is to conduct an additional subsurface <br /> investigation to more completely define the lateral and vertical <br /> extent of contamination. This option involves: <br /> o Installing additional exploratory soil borings <br /> o Installing additional groundwater wells <br /> s Collecting and analyzing soil samples <br /> N Sampling and analyzinggroundwater samples <br /> data <br /> ore <br /> These tewdata would be added to the and detailed maps of the depth sand 1 ateraloextentoofm <br /> complete the <br /> contamination at the Tracy site. <br /> OPTION #2 - SOIL AND GROUNDWATER REMEDIATION <br /> The second option is to remediate the site based on the existing y <br /> oval <br /> contaminants to o uld the einclue <br /> xtent noweknown. o Thehapproachesesources of <br /> data. This for soil and <br /> f <br /> groundwater remediation are presented here. <br /> f ' <br /> Soil Remediation <br /> The purpose of soil remediation is to remove the possible sources <br /> of contaminants that have, or mey in the future, affect the <br /> groundwater quality. In-situ remediation (biological or soil <br /> venting) does not appear to ae a prantical solution. This is <br /> lays and eilty. <br /> because the soils at the a" ce .are preduminantly::.c. y <br /> C that make in-situ r!:mediation. difficult and .less effective <br /> than in silt or sandy sore. xcavatzon.:of contaminated soils than ' <br /> i becomes ;ahs ` mast efficient, .means of boil ' remediation for the.. <br /> rel it,,ely :small.quantities .at chis: site:y <br /> j <br /> i PAGE 24 <br /> 275 GRANT LINE ROAD <br /> MEN <br /> i.l <br />