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13-May-o2 <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 /> -33.60 Groundwater elevation in ft msl <br /> (<0.50) Benzene concentration 1n parts per <br /> billion(ppb) <br /> (2 6) MTBE concentration 1n ppb <br /> <x Not detected at detection limit x <br /> igise 1gn <br /> Approximate hydraulic gradient=0 001 <br /> Hh RS <br /> Trash enclosure <br /> _2 Building <br /> -29.81 <br /> (<0 50) <br /> (<0 50)\ Car <br /> Wash <br /> Current and Former <br /> Vacuum UST Location <br /> OEc`'fl <br /> �o <br /> Alrlwater \ o <br /> MW-1 Canopy <br /> -<979) <br /> \< <br /> MW-3 (<1 0) <br /> -29.72 ♦ (550) <br /> (<0 50) <br /> (0 87) \ <br /> Dispenser Island(typ) <br /> 2,q <br /> T-29 77 9j) Planter <br /> (<0 50) <br /> (0 83) <br /> WATERLOO ROAD <br /> Scale (ft) FIGURE <br /> 0 15 30 60 <br /> rn <br /> Base map from Fupro map dated 11 Nov'A 2-1 <br /> Shell-branded Service Station Groundwater Contour/Chemical <br /> 4315 Waterloo Road G Concentration Map <br /> Stockton, California <br /> C A M B R I A April 18, 2002 <br />