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a , <br /> y <br /> 1 <br /> L(� <br /> Yj <br /> I <br /> r <br /> November 1990 -9- M8816$D <br /> � i <br /> Y.. CONCLUSIONS AND.RECOMMENDATIONS <br /> S 1 i <br /> , <br /> F <br /> y SOIL CONTAMINATION <br /> k Based on field observations and laboratory analytical results <br /> i <br /> obtained from the soil samples collected during the implementation of this <br /> I �. supplemental site assessment, coupled with the laboratory analytical results of <br /> the confirmatory soil samples previously collected following site remediation in <br /> e <br /> the vicinity of the former UST excavation, soil contamination resulting from the <br /> y inadvertent release of hydrocarbon products into the subsurface in the area of <br /> the former UST does not exist. <br /> 14 a <br /> Anal.-,-tical data obtained from Lht confirmatory soil samples collected <br /> j January 9, 1990, following the completion e.c' the soils removal program, exhibited <br /> �f only trace concentrations of toluene and, xylenes ..at concentrations well below <br /> #L DOHS a <br /> pplied action levels (SGD, 1490, pg,4). . During this assessment total <br /> xylenes and total lead were the only contaminant constituents detected at or <br /> above the practical quantitation .limits, and where detected were found in <br /> concentrations assumed to be ambient and inherent to the area. <br />¢� SGD recommends that :no adaitional site characterization of <br /> LJ hydrocarbon contaminated soil be conducted at the site, and that the site be <br /> granted closure status, in regards to soil contamination, by SJi1iD. <br /> FLj <br /> ' ('( <br /> GROUND WATER CONTAMINATION ` <br /> Four irrrgaLion/domestic ground water wells arr. located within a 500- <br /> - <br /> `= foot radius of the site:and were per sampled as SJLHD <br /> P p requirements on January 9, I <br /> k 1990 (SGD, 1990, pg. S). All four wells contained trace concentrations of s <br /> a ' benzene and three's:Pntained trace amounts of toluena. Both constituents were <br /> T present .in concentrations well below the applicable DWS action levels. <br /> . The: laboratory analytical results obtained from the ground water <br /> r <br /> , - -- - - ------- -- <br /> x -sample collected-during--the implementation—of this-assessm- ent ind--icated that Wane <br /> I"r of the contaminants evaluated for exist in excess of the applicable DWS action <br /> U levels. � <br /> - <br /> z , <br /> i <br /> 1 <br />