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e. Letter-Report from SG&D to County of San Joaquin <br /> public Health ;Services dated April,.. 4, 1.990 <br /> f`. Letter-Repott prepared. by sG&D to Color :Spot <br /> dated. February 14, 1990. <br /> q Letter� eport prepared by SG&D to Color Spot. <br /> 6 datec . .ctober 10, 1989.. <br /> 7' h. Letter-Report prepared by sG&D to Color spot <br /> 8 dated. March 290 1989. <br /> 9 4. I :have. conducted a survey of° known undergrr od storage. <br /> 10 tanks in the area. There is :a site to the -north and.. <br /> 11 hydrologicallyl lupgradient of the Color spot facility at which <br /> 12 thera have been as many as six underground storage tanks. We <br /> 1.3 believe :that this site may be one of the struress Of the benzene <br /> 14 contamination in the area.. We believe it ;is unlikely that Color <br /> 15 Spot's UST in question caused the 'benzene contamination. <br /> 16 5. Based on the foregoing data and our experience in <br /> 17 these types of cases, it is our opinion that: <br /> 18 a There is no evidence that gasoline was ever <br /> 19; stored in theUST -- no. T'PH as gasoline was detected in- any soil <br /> 20 samples, <br /> 21 b; : The lateral and vertical extent of petrQleu - <br /> 22 affected soil in the vicinity of the LIST has: been adequately <br /> 23 assessed and the petroleum-Affected sail in the vicinity of the <br /> 24 former UST was removed as. requ'ired by the LUFT :Guidelines.. <br /> 25 c:.. The data indicates that the; "UST didnot: adversely <br /> 26 impact the. . r <br /> oundwater at the site. The groundwater samples <br /> 27' taken in the immediate vicinity of the tank did not reveal any <br /> it contamination of concern and other groundwater samples reveal, <br /> `,1.- <br /> `V11+1T.dRSPT1SYTtifM�RLIN.DEC <br />