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T. <br /> . <br /> k <br /> ~ STEWART'S 13EAMN <br /> PKW I REPORT <br /> `'. PAGE., 5 <br /> Aromatic hydrocarbons(BTX)are more readily soluble!n water and have distributed <br /> — thrmj ut the a lulfer. Lateral dfslributfm of the;Antanfnatlon plume has not been <br /> datermind. <br /> This fuel tank has bw uSed to store diesel for the last 5 years,before that it was used to <br /> store gasolim. According to Bill Stewart,overfill spll*of petroleum fuel has been a <br /> serials problem In the Past and msy be the source of gasoline in the$011 and grwnd wrater. <br /> IFW r0lsmed from the tank has not tine very far and has not enterod the il�out eater. <br /> Analytical data isblimmarized In table I and4MIdix 8 gives the Individual data sheets. <br /> 4.0 CONCLUSIONS AND REMMMENDATlONS <br /> Subsurface geology Is duan hated by Llay rich strata f lt0rbecWd with slit and sand units <br /> that are water saturated. Ovitaminat ion is most ly of gasolfne and BT(,with a minor <br /> amarnt of motor of*. DJftl has net c i a prcblam. Ground water level Is at about 1 I <br /> feet and flows to the north. Gratnd water flow fm distributed the ooniaminatfoo to the <br /> north,but at this time the lateral extent or the plume Is not known. <br /> Geologic Technics recommends that a phase it assessment be conducted to determine the <br /> lateral extent of ground water contem ination dawn gradient from the tank. Sara of th is <br /> work may have to be conducted off property,which wi I1 have to be o0or51nated with <br /> Mighbor Ing property owners. <br /> i ' <br /># 5.0 QUALM ASSURANCE PROSRAPI <br /> The following measures were taken to insure that a hfph goal Ity st <br /> W!cross oonlamination would not occur. 'was conducted and <br /> 5.1 Equipment <br /> Solt borings were drilled with a 7.25 Inch (0.11)hollow stem continuous flip auger. <br /> Owned Inch(odd)m�odifiedated�Wiifornlaspiait�S samplerlandwit11 hles were brarsssampi��;,inga2- <br /> 5.2 Bering <br /> l; Detailed logs were made of each boring. The Information gatiied includes: sample <br /> depths,blow counts,horizons of detectable contamination(using field methods as <br /> explained In section 5.6),soil ciassfficati_n utilfzinr,fie UnifiedSa11 Cl <br /> assiffcation <br />