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ARCO AMS/PM <br /> SERVICE STATION <br /> S�. <br /> PRIVATE ROAD <br /> 0 30 60 <br /> SCALE IN FEET <br /> LEGEN D <br /> $ GROUNDWATER MONITORING WELL <br /> SERVICE <br /> TPPH TG CONCENTRATION OF CONSTITUENTS <br /> MW-4 IN MICROGRAMS PER LITER <br /> NCT SAMPLED STATION NOW <br /> MMPLEDLd M <br /> BUILDING TPH-G TBE <br /> TOTAL PETROLEUM <br /> L J HYDROCARBONS AS GASOLINE <br /> DISPENSER MW-7 B BENZENE <br /> ISLANDS W Nor SAMPLED T TOLUENE <br /> UNDERGROUND Y I T > Q'OQ <br /> USED OIL TANK E ETHYLBENZENE <br /> ¢ Q x TOTAL XYLENES <br /> MW-5 _ <br /> ND<50 > MTBE METHYL TERT BUTYL ETHER <br /> — —, ND<o.6 Np<1.2 o I V) NOT DETECTED ABOVE REPORTED <br /> 1200 ND<1.011ND<1.0 ND DETECTION LIMIT <br /> f 22 1 ND<1.0 CALCULATED GROUNDWATER <br /> I 2.14900<1.0 0.005 GRADIENT DIRECTION AND <br /> 4 MAGNITUDE IN FOOT PER FOOT <br /> MW-1 L <br /> l <br /> 2600 UNDERGROUND <br /> ND<0.5��ND<1.0 <br /> ND<1.0 ND<1.0 FUEL TANKS ' <br /> 7100 <br /> PLANTER <br /> DRIVEWAY <br /> i <br /> DRNVVAY <br /> TRANSFORMER <br /> FIGURE 3 <br /> CONCENTRATIONS OF PETROLEUM <br /> HYDROCARBONS IN GROUNDWATER <br /> JULY 1 , 1998 <br /> rD< <br /> 0 6 BP OIL SERVICE STATION NO. 11193 <br /> N0<1.03202 WEST HAMMER LANE <br /> ND<1.oSTOCKTON, CALIFORNIA <br /> 0 PROJECT NO. 10-136 ' <br /> 4 <br /> �ALISTO ENGINEERING GROUP <br /> WALNUT CREEK. CALIFORNIA _ <br /> f <br />