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02-Oct ao <br /> EXPLANATION <br /> Groundwater monitoring well <br /> Backfill well <br /> Groundwater elevation contour in feet <br /> VNV referenced to mean sea level(ft ms]) <br /> .110, Arrows indicate approximate groundwater <br /> flow direction <br /> 8735 Groundwater elevation in ft ms] <br /> NA Not Available —N— <br /> (<0 500) Benzene concentration in parts per billon (ppb) <br /> (56 0) MTBE concentration in ppb Analysis by <br /> EPA Method 8260 <br /> <x Not detected at detection limit x <br /> Approximate hydraulic gradient=0 001 <br /> MW-1A <br /> 8721/ <br /> -----------------------(111) -- <br /> I MW 3A (4680 <br /> 0) <br /> 8733 N..(<0 500) NM <br /> (22 0) (1 <br /> 860) <br /> ;,100) <br /> E� <br /> Carwash �o <br /> Canopy and <br /> Dispenser Islands Existing Nwj H <br /> Fuel USTs <br /> - MW-2A <br /> 87 35 1 <br /> (<0 500) <br /> (56 0) � <br /> Former UST <br /> -Location <br /> ON <br /> RAMP - INTERSTATE ROUTE NO. 205 <br /> Scale <br /> FIGURE <br /> U 1s 30 so <br /> 1 Inch=30 Feet <br /> Base Map Fugru of 4W95 2 <br /> _j <br /> Shell-branded Service Station Groundwater Contour/ <br /> 3725 Tracy Boulevard a Chemical Concentration Ma <br /> Tracy, California p <br /> C A M B R I A August 3, 2000 <br />