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15-Jun 04 <br /> LOUISE AVENUE <br /> Planter <br /> Former USTs MW-1 ® Planter <br /> Existing USTs <br /> 10.99 I <br /> <0.50 <br /> 28 Dispenser <br /> Islands <br /> tie � <br /> MW-3 <br /> log 1092 W <br /> <0.50 W <br /> <0 50 �4 <br /> Storage <br /> Building <br /> COD <br /> �' Trash ® ® 8 ® Z <br /> Enclosure �• Dispenser ' � 5 <br /> -10S — Islands I x <br /> E- <br /> ]anter <br /> I0.7 <br /> �ntainers <br /> MW-2 <br /> 1066 <br /> <0 50 <br /> EXPLANATION <br /> Groundwater Monitoring well <br /> ® Product dispenser numbers <br /> R / Groundwater elevation contour m feet referenced <br /> `Y to mean sea level (ft msl) Arrows indicate <br /> / approximate groundwater flow direction —N- <br /> 1342 <br /> N_1342 Groundwater elevation in ft msl <br /> <0 50 Benzene concentration in parts per billion(ppb) <br /> 42 MTBE concentration in ppb <br /> <x Not detected at reporting limit x FIGURE <br /> Scale (ft) <br /> Approximate hydraulic gradient= 0 002 2 <br /> N 0 20 40 80 <br /> M <br /> hell-branded Service Station © Groundwater Contour/ <br /> 1071 North Main Street Chemical Concentration Map <br /> Manteca, California <br /> C A M B R I A March 22, 2004 <br />