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04 Mar-02 <br /> EXPLANATION <br /> Groundwater monitoring well <br /> Groundwater elevation contour in feet <br /> referenced to mean sea level (ft msl) <br /> Arrows indicate approximate groundwater <br /> flow direction <br /> -3360 Groundwater elevation in ft msl <br /> (<0.50) Benzene concentration 1n parts per <br /> billion(ppb) <br /> (2 6) MTBE concentration in ppb <br /> <x Not detected at detection limit x <br /> High Rise Sign Note MW-3 sampled on February 5,2002 <br /> Approximate hydraulic gradient=0 002 <br /> I <br /> Trash enclosure <br /> i <br /> MW-2 Building <br /> -3081 <br /> (<0.50). <br /> (3 4) Car 2 <br /> Wash <br /> Vacuum Current and Farmer <br /> UST Location <br /> o ` <br /> 1 i <br /> Air/water o <br /> Canopy <br /> -30.82 <br /> MW-3 (<0 50) <br /> -3073 (250) <br /> (<0.50) LEo <br /> (<0 50) Vol <br /> MW-4 Dispenser Island(typ) <br /> -30 82 <br /> �• �� ��0 (<0 50) <br /> (0 56) Planter <br /> WATERLOO ROAD <br /> Seale (ft) FIGURE <br /> 0 15 30 60 <br /> rn <br /> Base map from Fupro map dated 11 Nov 94 2-1 <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 .fanuary 23, 2002 <br />