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N <br /> LOUISE AVENUE <br /> 0 20 aO <br /> SCALE IN FEET <br /> -- MW-4 <br /> 6600 <br /> 7.7 13.3 <br /> 840 11000 PLANTER <br /> UNDERGROUND <br /> STORAGE TANKS JI ICONCRETE SLAB <br /> MW-5 ` J MW-3 <br /> ' ND<50 3600 <br /> 9 3ND<0.5 ND<0.5 2 <br /> ND<0.5 ND<0.5O470 700 <br /> I <br /> BUILDING <br /> , 77 <br /> D �� <br /> UMW- <br /> SED <br /> KOIL PUMP <br /> ISLANDS 20 <br /> 1 <br /> 9 120 <br /> 2 MW-1 1 .8 0.6 <br /> ND<50 1 .2 1 .0 <br /> =a ND<0.5 ND<0.5 <br /> 0.6 2.1 <br /> CONCRETE SLAB Z <br /> I � <br /> D I RT LOT <br /> LEGEND <br /> GROUNDWATER MONITORING WELL <br /> TPH—G FIGURE 3 <br /> B T CONCENTRATION OF CONSTITUENTS <br /> IN PARTS PER BILLION (PPB) CONCENTRATIONS OF PETROLEUM <br /> E x <br /> TPH—G TOTAL PETROLEUM HYDROCARBONS IN GROUNDWATER <br /> HYDROCARBONS AS GASOLINE MAY 17, 1993 <br /> B BENZENE <br /> T TOLUENE BP OIL SERVICE STATION NO. 11195 g <br /> E ETHYLBENZENE 16500 SOUTH INTERSTATE I-5 <br /> X TOTAL XYLENES LATHROP, CALIFORNIA <br /> ND NOT DETECTED ABOVE REPORTED PROJECT NO. 10--151 <br /> DETECTION LIMIT <br /> CALCULATED GROUNDWATER <br /> GRADIENT DIRECTION AND AL15T0 ENGINEERING GROUP w <br /> MAGNITUDE IN FOOT PER FOOT WALNUT CREEK, CALIFORNIA <br /> O <br />