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ARCO AM/PM <br /> SERVICE STATION <br /> i <br /> � N <br /> PRIVATE ROAD <br /> 0 30 60 <br /> SCALE IN FEET <br /> MW-3 <br /> 610 ND <br /> MW-4 14012.9 <br /> 50 3.42.-8- GROUNDWATER MONITORING WELL <br /> 7ND<0.514 <br /> 0.5 ND<0.5 3.9 9TPH—G <br /> ND<1 SERVICE CONCENTRATION OF CONSTITUENTS <br /> 4.40 STATION w W B T IN PARTS PER BILLION, EXCEPT <br /> F 1 BUILDING z Z E X DISSOLVED OXYGEN, WHICH IS IN <br /> I 1 a :!s MW-7 DO PARTS PER MILLION <br /> L J DISPENSER Of # 5.1 57 TOTAL PETROLEUM <br /> ISLANDS W 0.5 TPH—G ND<0.51 ND<1 HYDROCARBONS AS GASOLINE--y <br /> :2 <br /> UNDERGROUND <br /> 4.7 8 BENZENE <br /> USED OIL TANK u MW-5 _ T TOLUENE <br /> 930 E ETHYLBENZENE <br /> —� 23� 23 � _� X TOTAL XYLENES <br /> 1 ui w$ MW-2 4.6 DO DISSOLVED OXYGEN <br /> 000 <br /> 1 440001 1150 ND NOT DETECTED ABOVE REPORTED <br /> 4 DETECTION LIMIT <br /> 760 800 CALCULATED GROUNDWATER <br /> 4 4 4.3 0.00 GRADIENT DIRECTION AND <br /> MW-1 l � <br /> 2200 " MAGN{TUDE IN FOOT PER FOOT <br /> 3617.4 UNDERGROUND .F <br /> 3.711.7 FUEL TANKS <br /> 4.11 <br /> P�p,NT>;R ...� <br /> DRIVEWAY <br /> TRANSFORMER <br /> FIGURE 3 <br /> CONCENTRATIONS OF PETROLEUM <br /> ,I HYDROCARBONS IN GROUNDWATER <br /> DECEMBER 9, 1994 <br /> ± SP OIL SERVICE STATION NO. 11193 R <br /> 3202 WEST HAMMER LANE <br /> MW-6 STOCKfON, CALIFORNIA <br /> ND<50 <br /> ND<0.5 ND<0.5 PROJECT NO. 10-136 <br /> ND<0.5 ND<1 + <br /> 3.5 <br /> ALISTO ENGINEERING GROUP <br /> A/wWALNUT CREEK, CAUFORNA <br /> i� � <br /> 4 <br /> a <br />