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ARCO AM/PM <br /> SERVICE STATION <br /> 7, <br /> PRIVATE ROAD , I <br /> I <br /> 0 30 60 <br /> t SCALE IN FEET <br /> MW-4 <br /> 74 MW-3 <br /> 4 99 I LEGEND <br /> ND<0.5 ND<0.5 2.6 ND<0.5 #1 GROUNDWATER MONITORING WELL <br /> ND<0.5 1 .3 ND<0.5 ND<0.5 <br /> 4.1 SERVICE 3.8 f, TPH-G CONCENTRATION OF CONSTITUENTS <br /> STATfON w �; Lv t B T IN PARTS PER BILLION, EXCEPT <br /> F 1 BUILDING z Z E X DISSOLVED OXYGEN, WHICH IS IN <br /> MW-7 DO PARTS PER MILLION <br /> L J DISPENSER <br /> w 76 TOTAL PETROLEUM <br /> ISLANDS <br /> 1 .0 ND<0.5 TPH-G HYDROCARBONS AS GASOLINE <br /> ND<0.5 2.0 <br /> UNDERGROUND � � 4.7 B BENZENE <br /> USED OIL TANK u u Q T TOLUENE <br /> MW-2 MW-5 <br /> MW- 170 = E ETHYLBENZENE <br /> 18000- -I 3700 120 34 1 '0 3 'F, X TOTAL XYLENES <br /> 1 .0610 900 ND<0.5 8.1 w W <br /> f 4.3 3.9 DO DISSOLVED OXYGEN <br /> a NOT DETECTED ABOVE REPORTED <br /> f N l 7 ND DETECTION LIMIT <br /> a CALCULATED GROUNDWATER <br /> MW-1J GRADIENT DIRECTION AND <br /> 63 '� MAGNITUDE IN FOOT PER FOOT <br /> ND<0.5 ND<0.5 UNDERGROUND iI <br /> ND<0.5 ND<0.5 FUEL TANKS <br /> 4.0 4 <br /> pLANTER <br /> DRIVEWAY ' <br /> i <br /> pRNEWAY <br /> TRANSFORMER <br /> FIGURE 3 <br /> CONCENTRATIONS OF PETROLEUM <br /> HYDROCARBONS IN GROUNDWATER <br /> APRIL 20 AND 25, 1994 <br /> BP OIL SERVICE STATION NO. 11193 <br /> 3202 WEST HAMMER LANE <br /> MW-6 STOCKTON, CALIFORNIA <br /> 53 <br /> ND<0.5 ND<0.5 PROJECT N0. 10-136 <br /> 0.6 2.4 <br /> 2.0 " <br /> ALISTO ENGINEERING GROUP <br /> `NWALNUT CREEK, CALIFORNIA <br /> 0 <br /> . 11 <br />