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has <br /> MEMO <br /> tituents <br /> e Dissolved-Phase petroleum hydrocarbon moscont <br /> pervasivein <br /> ! the ground water onsite appear to be most p <br /> in the area of Monitoring Wells mW-3 through MW-6 <br /> and MW-$• These wells are located east and northeast <br /> of the underground storage tank area. <br /> e Free product has been observed in Monitoring <br /> Well Mw-3, which is immediately northeast of the <br /> underground storage tanks. <br /> e The calculated value for the hydraulic conductivity <br /> offsite as determined using slug test data is <br /> characteristic of surface clay soils. This is <br /> consistent with the clay to silty clay soils <br /> encountered during drilling activities offsite. <br /> o The calculated average linear <br /> velocity <br /> isf a fluid <br /> particle moving in the aquifer <br /> 0.305 foot per year, <br /> on yes <br /> 9.2 Remedi <br /> tive of any remedial action to address a <br /> The general objec <br /> ro <br /> specific subsuCe ornvollumetofncontbaminatedtmaterials. <br /> toxicity, <br /> Mobility, <br /> erials in <br /> This objective is designed to address hazardous mat <br /> the subsurface sail and ground water in a manner that will <br /> both public health and the environment. <br /> protect This study <br /> ill only address subsurface ground water contamination. <br /> w <br /> ... 9.3 <br /> for <br /> t� In accordance with <br /> EPA <br /> and FeasibiltycstudiesoUnder zCERCLA <br /> - <br /> Remedial Investigations <br /> EPA, 1988a , <br /> (U. • ) and the DHS Califo <br /> rnia Site Mitigation <br /> (U.S. <br /> Tree Manual (CDHS, 1986), general response actions <br /> Decisiare measures that can be <br /> nation izoblemnatdatsitemanage <br /> meetand/or <br /> thecontrol <br /> s a specific contamination p <br /> bjectives. General response actions that <br /> remedial action o <br /> can be considered for ground water treatment at this site <br /> include: <br /> O No action <br /> e Containment <br /> o Collection <br /> o Treatment <br /> e Disposal <br /> 19 <br />