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L/L <br /> one Tree Road -2 - 30 October 1998 <br /> Ln, San Joaquin County <br /> L ary. <br /> Based on soil samples collected from the UST excavation and soil borings, low concentrations of TPHg <br /> L and BTEX constituents are present in soil below and adjacent to the former USTs. The lateral extent of <br /> contamination is less than 10 feet in the north and east directions and less than 15 feet to the south. <br /> The vertical extent of appears to be less than 20 feet bgs, with very low concentrations of total xylene <br /> encountered at 35 feet bgs in SB 1. Analytical results indicate that the ratio of total xylenes to benzene is <br /> large, suggesting some degree of degradation of the fuel constituents in soil. <br /> Groundwater was not encountered during excavation or drilling activities, and there is no indication that <br /> r the residual soil contamination will pose a threat to water quality. Based on the information presented <br /> for this site, I concur with the recommendation by SJCEHD for No Further Action Required. <br /> L <br /> 60 <br /> L <br /> 6. <br /> L <br /> i <br /> L <br /> L <br /> L. <br /> 1 <br /> L <br /> L <br /> L <br />