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4 Dec-03 <br /> LOUISE AVENUE <br /> Former USTs MW-1 © Planter <br /> 9 45 i Existing USTs <br /> .� <050 <br /> �N91 Dispenser <br /> Islands <br /> O <br /> MW-3 <br /> S 0 W <br /> <00 50 W <br /> <0 50 E� <br /> Storage <br /> o Building — — — — l Z <br /> Trash ® ® 6 ® f ~ <br /> Enclosure` • Dispenser • ,�' <br /> 92 - Islands - f I x <br /> Planter` <br /> Storage <br /> _2 Containers <br /> 8.99 <br /> <0 50 <br /> EXPLANATION <br /> Groundwater Monitoring well <br /> ® Fuel dispenser numbers <br /> Groundwater elevation contour in feet referenced <br /> / to mean sea level(ft msl) Arrows indicate <br /> approximate groundwater flow direction N- <br /> 13 42 Groundwater elevation in ft ms] <br /> <0 50 Benzene concentration in parts per billion(ppb) <br /> 42 MTBE concentration in ppb <br /> <x Not detected at reporting limit x Scale(ft) FIGURE <br /> JLApproximate hydraulic gradient=0 003 2 <br /> �, 0 20 40 80 <br /> N <br /> (� <br /> ell-branded Service Station Groundwater Contour/ <br /> 1071 North Main Street G Chemical Concentration Map <br /> Manteca, California <br /> C A M B R I A <br /> October 29, 2003 <br />