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February 2005 Excavation <br /> North Confirmation Samples H South v , <br /> 0 Mw105 Mw41 <br /> ' Mw5 Mw4B EB4 B11 B7 <br /> ..... .................................-..Fili................ ............................ ... Silty Clay Silty Clay <br /> ' 5 ...........................,,.,.... <br /> SiltyCl r...... ...._ ..................... ..... %% . <br /> Med. Sand <br /> 1 10 - d .... ..._5._.2....5..... 25............ 200.................... nd V <br /> Med. Sand Med. Sand <br /> 15 nd Silty Clay nd <br /> ' Sil Clay <br /> 20 � <br /> tnd ,-----{nd} (nd) nd - ----------------------- <br /> 25 Silty Clay ------ <br /> ' 30 <br /> nd Med. Sand <br /> ' 35 rMed. <br /> 0 20 40 60 <br /> Sand feet <br /> nd <br /> (nd) Benzene Concentrations <br /> 1 45 Soil ug/kg <br /> Water (ug/1) 4/13106 <br /> 1 50 <br /> Pre Excavation Contamintation Contours ------- <br /> Post Excavation Contamintation Contours — — <br /> 1 <br /> Figure10 Pombo Ranch <br /> North to South Benzene Cross Section <br /> 1 <br /> 1 <br /> • <br /> 1 <br />