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i <br /> West February 2005 ExcavationEast <br /> Confirmation Samples [nd] <br /> Mw3 B4 13319 B11 B12 Mv2 <br /> ........................ ........................... ... ..................... <br /> 5 ................na.............Fii.l............. <br /> .. .......................... Gr vel <br /> 1Silty _ ................ ................. .. <br /> 10 nd nd [nd] ' ....23Q0. ..,`.� ..............r................. d nd V <br /> Med Sa ndSilty Clay <br /> 1 15 nd nd <br /> nd <br /> 1 20 Silty Clay nd <br /> nd <br /> 25 nd <br /> ' (nd) Med Sand (nd) <br /> 30 nd <br /> 35 0 20 40 60 <br /> feet <br /> Pre Excavation Contamintation Contours ------ MTBE Concentrations <br /> ' Soil ug/kg <br /> Post Excavation Contamintation Contours -- — - Water(ug/1) 4113106 <br /> 1 <br /> 1 <br /> Figure 31 . Pombo Ranch East to West <br /> 1 MTBE Cross Section <br /> 1 <br /> 1 <br /> 1 <br />