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23 Jun 04 <br /> EXPLANATION <br /> Groundwater monitoring well <br /> ' 0 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 /> -3867 Groundwater elevation in ft msl <br /> (<0 50) Benzene concentration in parts per <br /> billion(ppb) <br /> (<0 50) MTBE concentration in ppb <br /> <x Not detected at reporting limit x <br /> High Rise Sign <br /> Approximate hydraulic gradient—0 002 <br /> Trash enclosure <br /> MW-2 Building <br /> 35 24 <br /> + -3524 <br /> (<0 50) <br /> 3s (<0 50) <br /> ;Current <br /> Car <br /> Wash <br /> Vacuumand Former <br /> �! UST Location Air/water—MW-1 Canopy <br /> -3518 <br /> (13 0) Li <br /> # Dispenser Island(typ) <br /> MW-3 MW-4 <br /> -3510 *-3519 <br /> (<0 50) (<0 50) Planter <br /> (2 9) (_(<0 50) <br /> WATERLOO ROAD <br /> Scale (ft) FIGURE <br /> 0 15 0 - 60 2 <br /> Base map from Fugro map dated 11 Nov 94 <br /> Shell-branded Service Station Groundwater Contour/ <br /> 4315 Waterloo Road G Chemical Concentration Map <br /> Stockton, California <br /> C A M B R I A April 28, 2004 <br />