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r <br /> I <br /> ARCO AM/PM <br /> SERVICE STATION ' <br /> PRIVATE ROAD <br /> a 30 610 <br /> SCALE W FEET <br /> I EGENV7 <br /> MW-3 $ GROUNDWATER MONITORING WELL <br /> SERVICE ND<0.5 I ND<1.0 B 280 Fi <br /> MW-4 T <br /> NOT SAMPLED STATION ND<1.D ND<1,0 w CONCENTRATION OF CONSTITUENTS <br /> F -1 BUILDING 260 z Z MTBE IN MICROGRAMS PER LITER, <br /> I TOTAL PETROLEUM <br /> L J DISPENSER TPH G HYDROCARBONS AS GASOLINE <br /> ISLANDS w MW-7 B BENZENE <br /> UNDERGROUND NOT SAMPLED T TOLUENE <br /> USED OIL TANK u Li <br /> 2 E ETHYLBENZENE <br /> MW-5 x TOTAL XYLENES <br /> — -� _ND<o. 60 D<1.o MTBE METHYL TERT BUTYL ETHER <br /> ! BMW-2 ND<1No<�ta<1.o ND NOT DETECTED ABOVE REPORTED <br /> y y 2700 <br /> 7611.2 o DETECTION LIMIT <br /> 4 4 <br /> 9.312.1 CALCULATED GROUNDWATER <br /> 3100 pp 0.006 GRADIENT DIRECTION AND <br /> Mw- <br /> s1 L ps MAGNITUDE IN FOOT PER FOOT <br /> o <br /> ND<0.5 f ND<1.0 UNDERGROUND <br /> ND<1.017 ND<1 A FUEL TANKS <br /> pL N7ER <br /> DRIVEWAY <br /> DFt1VEwAY , <br /> TRANSFORMER <br /> FIGURE 3 <br /> CONCENTRATIONS OF PETROLEUM <br /> HYDROCARBONS IN GROUNDWATER <br /> MAY 22, 1997 <br /> BP OIL SERVICE STATION NO. 11193 <br /> 3202 WEST HAMMER LANE <br /> MW-6 STOCKTON, CALIFORNIA x <br /> ND<o.soi°1D<1.o PROJECT N0. 10-136 <br /> NDNo<1.0 <br /> 57 <br /> AL ISTO ENGINEERING GROUP <br /> WALNUT CREEK, CALIFORNIA <br />