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22-Jun 04 <br /> N IL MW-4 Former i Former <br /> -2408 Building I Restrooms` J- �- <br /> <0 50/<0 501<0.50 f-----`- <br /> l Former Product Former <br /> \ Piping Trench Dispenser <br /> (tyl}�rz <br /> ) <br /> rr�--F'--� I MW-5 <br /> 'o Lt r—til -2416 <br /> F" <0 50/<0.50/3 1 <br /> I J <br /> r+ -----------I ; Former= <br /> d Former I „ruS <br /> I Ts 1 <br /> Building <br /> -2406 II II <br /> MW-3 ` r1 0.72/<0.50/121' <br /> �,��-Y �1`------------ u i} <br /> -23.86 L1� -t ----------- �__=g <br /> <0 501<0.501<0 50 <br /> MW-2 <br /> -24.14 <br /> L I I � <br /> Driveway Sidewalk 50/12/3.9 Driveway <br /> EAST CHARTER WAY <br /> EXPLANATION <br /> Groundwater Monitoring Well <br /> Groundwater elevation contour in feet referenced to <br /> mean sea level(ft msl) Arrows indicate <br /> approximate groundwater flow direction <br /> MW-1 Well designation <br /> -25 30 Groundwater elevation,ft msl <br /> 2 31<0.50/140—Benzene/MTBE/1,2-DCA concentrations <br /> to groundwater in parts per billion(ppb) <br /> <x Not detected at reporting limit x <br /> Scale(ft) FIGURE <br /> Approximate hydraulic gradient= 0 003 <br /> 0 15 30 64 2 <br /> Former Shell Service Station Groundwater Contour/ <br /> 1313 East Charter Way Chemical Concentration Map <br /> Stockton, California <br /> C A M B R I A April 28, 2004 <br />