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West February 2005 Excavation East <br /> ' Confirmation Samples [nd] <br /> • Mw3 B4 13319 B11 B12 Mw2 <br /> ......................... ............................ <br /> a .................... ... <br /> Fill Gravel <br /> s <br /> nd ,. <br /> ' Silty Clay .._...._......._............_..................... ............................ <br /> -- — CZL% <br /> 10 nd nd ......... 26000..._............................. .1.200......_. % nd V <br /> Med Sand nd <br /> ' 15 nd nd Silty Clay <br /> nd <br /> 1 20 Silty Clay nd <br /> nd <br /> 25 nd <br /> (nd) Med Sand (nd) <br /> 1 30 nd <br /> 1 <br /> 351 0 20 40 60 <br /> feet <br /> ' Ore Excavation Contamintation Contours ------- Xylene Concentrations <br /> Soil ug/kg <br /> Post Excavation Contamintation Contours — — — Water(ug/1) 4113106 <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> Flgure23 Pombo Ranch <br /> West to East Xylene Cross Section <br /> 1 <br /> 1 <br /> • <br /> 1 <br />