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03-Dec-04 <br /> MW-4 r-------I <br /> N -27.09 ' Former + Former <br /> <0 501<0 501<0.50 I Building Restrooms <br /> E--- <br /> `i Former Product Former <br /> > a?� Piping TrVenchDispenser <br /> � \ {typ) <br /> Q ?� MW-5 <br /> >4 Ile <br /> F' -2604 <br /> L1�� �� �► *<0.50/<0.50/<0 50 <br /> 09 <br /> I I <br /> I <br /> ------- --t-, _ Former <br /> d I Former I I+ USTs <br /> Building <br /> ------- <br /> I <br /> MW-1 <br /> II II <br /> -27.07 <br /> II II <br /> MW-3 1 24/<1.0/110-- ------------- u �j <br /> -26.96 Lt'-L------------- <br /> <0 <br /> -------.----<0 50/<0 50/<0.50/-,Il- <br /> MW-2 <br /> -27,14 <br /> Driveway Sidewalk <0.50/6.1/4.1 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 /> J approximate groundwater flow direction <br /> MW., Well designation <br /> -27 07 Groundwater elevation,ft ms] <br /> 2 4/<1.0/110 —Benzene/MTBE/1,2-DCA concentrations <br /> in groundwater in parts per billion(ppb) <br /> <x Not detected at reporting limit x <br /> Scale(ft) FIGURE <br /> Approximate hydraulic gradient= 0 016 2 <br /> 0 15 30 64 <br /> r <br /> r Former Shell Service Station Groundwater Contour/ <br /> 1313 East Charter Way G Chemical Concentration Map <br /> Stockton, California <br /> C A M B R I A October 21, 2004 <br />