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11-Sep-02 <br /> EXPLANATION <br /> ---- --- --- ---- <br /> Groundwater monitoring well p B-5 ----- - B-6 <br /> Vapor extraction well ND/20' ND/20' <br /> O Soil boring location <br /> ® Soil sample location - <br /> ND/15' Benzene concentrations in soil in parts <br /> per million/Depth in feet,in known <br /> � Existing USTs � <br /> ND Not detected,detection/mut unknown <br /> <x Not detected at detection liitut x <br /> ------------- - -- <br /> Note Soil samples collected in the top 20 feet of soil <br /> B-8 0 o B-7 <br /> ND/20' ------------------ ----------------' ND120' <br /> - - - - - - - - - - - <br /> - - - - - - - - - - - - - - , <br /> i Canopy and ' <br /> ' Dispenser <br /> Islands i <br /> ' TR-2A® i <br /> ' <br /> MW-2 -� ' TR-1 ND � <br /> ND/10' E <br /> ND i <br /> B-1 i <br /> ND/20' <br /> T1-N ' <br /> ' 0.11 MW4 <br /> _ <0 0005/14' <br /> TI-S - - - - -0-T2-N; - - - - - - - - - - - - - - - <br /> 0 61 ' VEW-2 0 025 ® T3-N; B4 <br /> 0 021115' 0 037 T4-N® 0 07/20' <br /> -- -------- ----------- ®T2-S <br /> ' 0.020 <br /> 0 10 <br /> - B-2 A -- - - --- vEw-1 <br /> ---------- ND/10' - - - -,- r - ---- 0.13/10' <br /> T3-S <br /> N <br /> 0076, <br /> MW-3 <br /> T4-S ND/15' <br /> n ® 0 032 <br /> B-3 <br /> Scale (ft) ND/15' <br /> 0 5 10 20 <br /> Former Shell Service Station/ Benzene Mass Balance <br /> Pershing Oil G Calculation <br /> 4445 N Pershing Avenue <br /> Stockton, California C A M B R I A <br />