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10,Jul-03 <br /> EXPLANATION <br /> Groundwater monitoring well <br /> Q Groundwater elevation contour in feet <br /> referenced to mean sea level (ft msl) <br /> Arrows indicate approximate <br /> groundwater flow direction <br /> i <br /> Z <br /> -2247 Groundwater elevation in ft ms] <br /> (<0 50) Benzene concentration in parts per billion <br /> (Ppb) <br /> (<.5 0) MTBE concentration in ppb by EPA <br /> Method 8260 <br /> C `\ <x Not detected at reporting limit x <br /> ` Approximate hydraulic gradient=0 001 <br /> Dispenser Island \ <br /> (typ) <br /> Station ` <br /> Building \ <br /> MW-3 <br /> -22.43.-- <br /> I' (<0 50) <br /> (c5 0) -2247 <br /> Existing V01, (<0S0) <br /> USTs o ` If<5 0) <br /> Planter <br /> V �, \ <br /> "Former UST ` <br /> MW-1 <br /> Location \` <br /> -22.42— - - - - <br /> (<0.50) <br /> (74j _N <br /> HAMMIER LANE <br /> Scale (ft) <br /> FIGURE <br /> 0 15 30 60 2 <br /> Base map from Fugro map of 6-Feb-96 <br /> hell-branded Service Station Groundwater Contour/ <br /> 7910 Lower Sacramento Road G Chemical Concentration Map <br /> Stockton, California <br /> C A M B R I A April 24, 2003 <br />