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i <br /> 2f-Sep 04 <br /> LOUISE AVENUE <br /> — fl—anter — —---- <br /> I — <br /> Former USTs MW-1 , ?' ® Planter <br /> �4384:f ' I Existing USTs <br /> <0.50 <br /> 13 Dispenser <br /> Islands <br /> mss'' 8 S'�& oo <br /> 0 <br /> �f <br /> MW-3 vlrl <br /> -9.46 7 3 1 G 26 <br /> 9 84 <0 50 W <br /> 071 <br /> I ° <br /> 83 TDispenser E! <br /> — Islands — I x <br /> Trash C <br /> Enclosure <br /> 8.2 Planter <br /> I <br /> 18.1 <br /> MW-2809 <br /> �on�aaners <br /> <0.50 <br /> <0 50 <br /> EXPLANATION <br /> Groundwater Monitoring well <br /> ® Product dispenser numbers <br /> R / Groundwater elevation contour in feet referenced <br /> / to mean sea level(ft mst) Arrows indicate <br /> approximate groundwater flow direction —N- <br /> 853 Groundwater elevation in ft ms] <br /> <0 50 Benzene concentration in parts per billion(ppb) <br /> 13 MTBE concentration in ppb <br /> <x Not detected at reporting limit x Scale(ft) FIGURE <br /> Approximate hydraulic gradient= 0 0032 <br /> 4�he=ll-branded <br /> 0 20 40 80 Service Station © Groundwater Contourl <br /> 1071 North Main Street Chemical Concentration Map <br /> Manteca, California <br /> C A M B R I A July 9, 2004 <br />