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Chevron U.S.A. <br /> Page 12 <br /> Based on the results of analyses on sample number <br /> DI3-15-N.Wall, it was decided that soil east and northeast of <br /> MW-2 should also be removed. Excavation of soil in these <br /> areas commenced on March 19, 1990. Soil was removed until <br /> field screening indicated that remaining soil did not contain <br /> detectable hydrocarbons. Four soil samples were obtained <br /> from the limits of excavation on March 20, 1990. The results <br /> of analyses on the soil samples are presented in Table II-B. <br /> Sample locations are as presented in Plate 6. <br /> TABLE II-B <br /> Concentrations of Petroleum Constituents in Soil . <br /> (Concentrations measured in parts per million) <br /> Sample <br /> I.D. Benzene Toluene Ethbnz. Xylenes T.P.H. <br /> D13-3-16-N.W.Wall n/d n/d n/d n/d n/d <br /> D13-3-14-N.E.Wall n/d n/d n/d n/d n/d <br /> DI3-3-16-S.E.Wall n/d n/d n/d n/d n/d <br /> D13-3-18-Bot. n/d n/d n/d n/d n/d <br /> Legend: <br /> Ethbnz. - Ethylbenzene <br /> T.P.H. - Total Petroleum Hydrocarbons <br /> n/d - Non-detected <br /> * - Total Petroleum Hydrocarbons as gasoline & diesel <br /> DI - Dispenser Island <br /> S - South, N - North, E - East, W - West, C - Center <br /> Bot - Bottom of Excavation <br /> Wall - Excavation Szdewall <br /> < - Less than <br /> • 16000-250-044 <br /> Corrected <br /> D\\[F�, & ;b(c)ORF <br />