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N <br /> ARCO <br /> SERVICE <br /> STATION <br /> MW-7 a zo ao <br /> INACCESSIBLE scuE IN rr <br /> LOUISE AVENUE <br /> MW-4 <br /> 530 <br /> ND<0.5 I ND<1.0 <br /> ND<1.0 I ND<1.0 <br /> NOT ANALYZED —— <br /> 7.9 <br /> �op <br /> MW 003 PLANTER ` <br /> UNDERGROUND / // ND<12 ND<25 <br /> STORAGE TANKS J�J/ 0 IND<25 <br /> NOT ANALYZED <br /> MW-5 (J <br /> ND<50 <br /> ND<0.5 ND<1.0 MW-2 <br /> ND<1.0 ND<1.0 <br /> XU <br /> N8 g 0 vim= ND<0.5 I ND<1.0 <br /> ND<1.0 ND<1.0 <br /> ( ����� NOT ANALYZED _o8.4 Mo50ERGROUND ND<0.5 ND<1.0 <br /> D OIL TANK PUMP ND<1.0 ND<1.0 <br /> ISLANDS NOT ANALYZED <br /> 8.7 <br /> MW-1 <br /> ND<50 <br /> RT LOT ND<0,5 I ND<1.0 <br /> LEGEND ND<1.0 <br /> NOT ANALYZED <br /> 7.7 <br /> GROUNDWATER MONITORING WELL <br /> TPN—G CONCENTRATION OF CONSTITUENTS <br /> —B—I IN MICROGRAMS PER LITER, �IT <br /> TPHI D EXCEPT DISSOLVED OXYGEN, <br /> DO WHICH IS IN PARTS PER MILLION <br /> TPH—G TOTAL PETROLEUM <br /> HYDROCARBONS AS GASOLINE FIGURE 3 <br /> 8 BENZENE CONCENTRATIONS OF PETROLEUM <br /> T TOLUENE HYDROCARBONS IN GROUNDWATER <br /> E ETHYLBENZENE <br /> x TOTAL XYLENES SEPTEMBER 5, 1996 <br /> TPH—D TOTAL PETROLEUM BP OIL SERVICE STATION NO. 11195 <br /> HYDROCARBONS AS DIESEL 16500 SOUTH INTERSTATE 5 ' <br /> DO DISSOLVED OXYGEN LATHROP, CALIFORNIA <br /> NOT DETECTED ABOVE REPORTED <br /> ND DETECTION LIMIT PROJECT N0. 10-151 <br /> a <br /> CALCULATED GROUNDWATER <br /> 0.002 GRADIENT DIRECTION AND AL1STO ENGINEERING GROUP <br /> MAGNITUDE IN FOOT PER FOOT /�\ WALNUT CREEK, CALIFORNIA <br /> 0 <br />