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sl <br /> Chevron D-S.A. - Page 17 <br /> C-D, which was situated in the general vicinity of Dames & Moore's current soil <br /> boring/monitoring well location B-1. Similar to khat was reported during Dames & <br /> Moore's current investigation, the concentrations of benzene noted"in those <br /> Woodward-Clyde sample: obtained from about <br /> 20 and 30 feet below grade vete <br /> reported at C.12 and 0.16 pars <br /> _. per million, respectively. A11 other <br /> constituents were reported as non-detected for the samples analyzed at the time <br /> of that investigation. <br /> Ac;ual discernible residual contamination at the subject property is <br /> i. <br /> interpreted by the attenuating trend observed at the B-1 and B-2 soil boring <br /> _ locations. This trend has been interpreted to suggest that residual vertical <br /> liquid migration has attenuated observably at an a <br /> � g y � <br /> o pproxiraate maximum depth of 20 <br /> { - feet below grade, an is interpreted as most <br /> probably limited to the previous <br /> dispenser island locations. <br /> 3 <br /> Ground water. samples obtained from the ground water monitoring wells <br /> installed at the subject property were submitted to a <br /> State-approved laboratory <br /> a� <br /> for chemical analysis. Ground water samples were analvzed to detect the presence <br /> and concentration of petroleum constituents as referenced to gasoline. The <br /> results of those analyses reported non-detectable levels of petroleum <br /> hydrocarbons present in ground water. <br /> DANfEs &NTOORE <br />