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k f <br /> ARCO AM/PM i <br /> SERVICE STATION ' <br /> i <br /> i <br /> PRIVATE ROAD { <br /> � N <br /> 0 30 60 <br /> w <br /> SCALE IN FEET <br /> Mw-4 ' LEGEND <br /> 66 MW-3 $ GROUNDWATER MONITORING WELL <br /> G0 . <br /> ND<0.5 ND<0.5 5TPH-G CONCENTRATION OF CONSTITUENTS <br /> ND<0.5 ND<0.5 SERVICE 4610.9 W D T <br /> 4.04 Z IN PARTS PER BILLION, EXCEPT <br /> STATION 0.9 2.1 z W DISSOLVED OXYGEN, WHICH IS IN <br /> F -1 BUILDING 3.6 E X <br /> I I DO PARTS PER MILLION <br /> L J DISPENSER OC TPH_G TOTAL PETROLEUM <br /> ISLANDS Ld MW-7 HYDROCARBONS AS GASOLINE ;I <br /> UNDERGROUND 6.8 6ND<0.5 6 BENZENE <br /> USED OIL TANK <br /> = ND<0.5 ND<0.5 T TOLUENE <br /> 4.6 E ETHYLBENZENE <br /> -, M- X TOTAL XYLENES <br /> foMW-o0 44�0 1.._9__ DO DISSOLVED OXYGEN } <br /> MW-1 1 15300 3.9 <br /> 80 1 ND NOT DETECTED ABOVE REPORTED <br /> 1750 340 3'9 ` DETECTION LIMIT <br /> 3 630.2 I 4.3 CALCULATED GROUNDWATER <br /> 2.4 7.1 J GRADIENT DIRECTION AND <br /> 3.910 - MAGNITUDE IN FOOT PER FOOT <br /> UNDERGROUND { <br /> FUEL TANKS ' <br /> PLANTER <br /> DRIVEWAY <br /> I <br /> DRNE'NA`! <br /> TRANSFORMER <br /> FIGURE 3 <br /> CONCENTRATIONS OF PETROLEUM <br /> HYDROCARBONS IN GROUNDWATER <br /> JULY 28, 1994 <br /> BP OIL SERVICE STATION NO. 11193 <br /> 3202 WEST HAMMER LANE R <br /> MW--6 STOCKTON, CALIFORNIA <br /> re <br /> ND<0.5 ND<0.5 PROJECT NO. 10--136 <br /> ND<0.5 ND<0.5 " <br /> 2.2 ` <br /> �ALISTO ENGINEERING GROUP r <br /> I /_\ WALNUT CREEK, CALIFORNIA <br /> 0 <br /> r <br />