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mmew <br /> I1 <br /> L+Yxe li V n7 ` S V ►i L Il AR Y <br /> In 1985, Santa Fe purcllased property in Stockton at 1033 East Scotts <br /> Avenue with the liltei1t10:1 of building an interchange truck. <br /> Following the purchase of the property, a concrete vault and three <br /> underground fuel tanks were discovered at the site. Under the <br /> supervision of the Environmental Health Division of the San Joaquin <br /> County Public Health Services, the tanks were removed between <br /> December 1987 and January 1988. During removal of the tanks, it <br /> was discovered that the tanks had leaked and contaminated tkle <br /> surrounding soil. Approxiinately 102 cubic yards of Contaminated <br /> soil were removed, inanifested and hauled to a waste management <br /> facility by Erickson, Inc. Soil samples submitted for laboratory <br /> analyses were found to contain petroleum hydrocarbons which were <br /> characterized as a heavy diesel fuel. No benzene, toluene, <br /> ethylbenzene or xylenes were detected in any of the samples. <br /> Soil contamination from the leaking diesel oil tanks at this site was <br /> investigated in August 1989. At this time, soil contamination was <br /> found in 8 0£ 10 borings installed in and around the former tank <br /> locations. Most of the contaminated soil was encountered at depths of <br /> between 5 and 25 feet below the ground surface. Two of the borings <br /> encountered significant soil contamination below a depth of 30 feet. <br /> Clean bottom-of-the-hole samples were obtained in 9 of the 10 borings. <br /> One of the borings was terminated at a depth of 35 feet below the <br /> ground surface in soil with a TPH concentration of 1200 ppin. An <br /> estimated 2000 cubic yards of contaminated soil remain in the <br /> ground. <br /> In January 1991, three monitoring wells were installed around the <br /> former tank locations in order to determine if groundwater had been <br /> impacted by the leaking tanks, Analytical results of groundwater <br /> samples collected from these wells indicate that the product from the <br /> former leaking fuel tanks has not reached the groundwater. <br />