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1 <br /> February 2005 Excavation <br /> North Confirmation Samples [nd] South <br /> MW105 Mw4/ <br /> Mw5 Mw4B E134 1311 B7 <br /> 1 _ <br /> Fill.i......_- ..... .... ................... Silty Clay Silty Clay <br /> 5 ............ ....... ..... .......... <br /> Silty Clay .................... Med. Sand <br /> nd 7777 Silty <br /> dl Silty <br /> 10 --- V <br /> Med. Sand Z, Med. Sand <br /> 15 nd Silty Clay nd <br /> 20 Silty Clay <br /> ]nd (nd) (nd) nd <br /> 25 Silty Clay ---------------------------------- <br /> 30Sand <br /> nd Med. <br /> 35 Silty C1a 0 20 40 60 <br /> Med. Sand feet <br /> 40 nd(nd) MTBE Concentrations <br /> 45 Soil ug/kg <br /> Water(ug/1) 4/13106 <br /> Pre Excavation Contamintation Contours ------- <br /> 50 Post Excavation Contarnintation Contours <br /> 1 ' <br /> 1 ' <br /> 1 <br /> Figure 30 Pombo Ranch <br /> North to South MTBE Cross Section <br />