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21-May-03 <br /> EXPLANATION <br /> Groundwater monitoring well <br /> ® Product dispenser number <br /> Groundwater elevation contour in feet <br /> referenced to mean sea level(ft msl) <br /> Arrows indicate approximate groundwater <br /> flow direction <br /> -33.44 Groundwater elevation in ft msl <br /> (<0.50) Benzene concentration in parts per <br /> billion(ppb) <br /> (190) MTBE concentration in ppb <br /> High Rise Sign x Not detected at reporting limit x <br /> Approximate hydraulic gradient=0 001 to 0 002 <br /> Trash enclosure <br /> MW-2 <br /> 33.41 Building <br /> (<0.50) <br /> Car <br /> r?/ / Current and Former Wash <br /> UST Location <br /> Vacuum�� <br /> Au/water O <br /> a <br /> MW-1 <br /> -33.4 -,--Canopy <br /> (<0 50) <br /> (1190) <br /> -3 T 8 <br /> -33.38 <br /> (<0 50) ® �' <br /> (<5 0) <br /> + Dispenser Island(typ) <br /> MW-4 <br /> -3343 <br /> (<0.50) Planter <br /> (<5 0) <br /> WATERLOO ROAD <br /> Scale(ft) FIGURE <br /> 0 15 30 60 <br /> rn <br /> 94ase map from Fugro map dated 11 Nov 94 2-1 <br /> Shell-branded Service Station Groundwater Contour/ <br /> 4315 Waterloo Road Chemical Concentration Map <br /> Stockton, California <br /> CAMBRIA <br /> April 10, 2003 <br />