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_ _ <br /> -Alt <br /> Chevron U.S.A. <br /> Page 10 <br /> TABLE I-C <br /> Concentrations of Petroleum Constituents in Soil <br /> (Concentrations treasured in parts per million] <br /> sample <br /> •D• Benzene Toluene Ethbnz. Xylenes T.P.H. <br /> DI3-29-N.C.Bot n/d n/d n/d n/d n/d* <br /> DI3-13-N.E.Wall n/d n/d n/d 0.1 8** <br /> D13-17-C.Wall 0.58 10 4.6 23 490** <br /> D12/3-17-N.W.Bot n/d n/d n/d n/d n/d* <br /> D13-30-N.W.Bot n/d n/d n/d n/d n/d* <br /> W_ <br /> D13-27--N.W.Wall n/d n/d n/d n/d n/d* <br /> D13-25-N.E.Wall 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 /> ** - Total Petroleum Hydrocarbons as gasoline <br /> i (Total Petroleum Hydrocarbons as diesel = n/d) <br /> DI - Dispenser Island <br /> S - South,.,_ K - North; E - East, W - West, C - Center <br /> Bat-- Bottom of Excavation <br /> Hall - Excavation Sidewall <br /> < - Less than <br /> The locations of all samples presented in Tables I-B and <br /> I-C are presented on Plate 4. Certified Analytical Reports <br /> are included in Appendix A. <br /> Excavation activities were temporarily ceased on January <br /> 31, 1990. On February 19, 1990 activity at the site was <br /> resumed. "Clean" soils stockpiled during the initial <br /> excavation were placed as backfill in the -bottom-of-.the pit- - <br /> (see Sectir'; 5.2) Excavation of soil on the south east side <br /> Of MW-2 (DI-3) commenced on February 22, 1990 (Plate 5) . <br /> 16000-250-044 <br /> Corrected <br />