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!1 (71 <br /> ARCO AM/PM <br /> SERVICE STATION <br /> PRIVATE ROAD <br /> 0 30 60 <br /> SCALE IN FEET <br /> LEGEN D <br /> GROUNDWATER MONITORING WELL <br /> SERVICE (-8.66) GROUNDWATER ELEVATION IN <br /> MW-4(-8.68) 0 STATION (-8.593) W w FEET ABOVE MEAN SEA LEVEL <br /> BUILDING 1 Z <br /> r -8.70 GROUNDWATER ELEVATION <br /> I CONTOUR IN FEET ABOVE <br /> L J DISPENSER 1 MW-7 (CONTOUR INTERVAL-0.10 FOOT) <br /> 71 ISLANDS ` ui (-8.73) <br /> ` �8 CALCULATED GROUNDWATER <br /> UNDERGROUND <br /> USED OIL TANK JO GRADIENT DIRECTION AND <br /> f _ 8 MAGNITUDE IN FOOT PER FOOT <br /> 80 <br /> — -, MW-5 ! < (n <br /> iI $MW-2 (-8.66) � / w <br /> (-8.63) <br /> L . <br /> r Q / <br /> MW— UNDERGROUND <br /> (-8.67) FUEL TANKS <br /> PLANTER DRIVEWAY/ c� <br /> 1 <br /> gR4VEW AY <br /> TRANSFORMER <br /> FIGURE 2 <br /> j POTENTIOMETRIC GROUNDWATER <br /> ELEVATION CONTOUR MAP <br /> MAY 22, 1997 <br /> BP OIL SERVICE STATION NO. 11193 x <br /> -8.80 3202 WEST HAMMER LANE <br /> MW-6 STOCKTON, CALIFORNIA <br /> (-8.78) <br /> PROJECT NO. 10-136 <br /> 0 <br /> ALISTO ENGINEERING GROUP o <br /> WALNUT CREEK, CALIFORNIA o <br />