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------------ <br /> N <br /> ARCO <br /> SERVICE <br /> >., STATION <br /> 0 20 40 <br /> MW-7 <br /> INACCESSIBLE SCALE IN FEET <br /> LOUISE AVENUE <br /> MW--4 <br /> 19000 <br /> 7.3 IND<10 <br /> ND<10 ND<10 <br /> 18000 -- <br /> UNDERGROUND <br /> STORAGE TANKS <br /> PLANTER ` <br /> MW—6 <br /> ( J ND<1200 <br /> ND<0.5 I ND<1.0 <br /> / MW--3 ND<1.000 82o D<1.0 <br /> Crj 1 MW-5 20 4I ND<1 D V <br /> AI <br /> 3600 v C� ND<10ND<10 <br /> ~ ND<0.5 ND<1.0 ��o� 21000 <br /> NDC133000<11 �m MW-2 <br /> 17000 <br /> UNDERGROUND ND<D.5 I ND<1.D <br /> USED OIL TANK PUMP ND<i.0 ND<1.0 <br /> ISLANDS 16000 <br /> Mw—1 <br /> No<2500 p� <br /> DfRT LOT �—ND<1.0 <br /> D<0.5 I ND<1.Q <br /> ND<1.0 1 <br /> 1200 <br /> LEGEND zQ <br /> 4� GROUNDWATER MONITORING WELL <br /> TBPH TG CONCENTRATION OF CONSTITUENTS <br /> E x IN MICROGRAMS PER LITER FIGURE 3 <br /> MTBE <br /> TPH-G TOTAL PETROLEUM CONCENTRATIONS OF PETROLEUM <br /> HYDROCARBONS AS GASOLINE HYDROCARBONS IN GROUNDWATER <br /> B BENZENE <br /> T TOLUENE JANUARY 15, 1998 <br /> E ETHYLBENZENE BP OIL SERVICE STATION NO. 11195 <br /> X TOTAL XYLENES 16500 SOUTH INTERSTATE 5 <br /> MTBE METHYL TERT BUTYL ETHER LATHROP, CALIFORNIA Y <br /> No NOT DETECTED ABOVE REPORTED PROJECT N0. 10-151 <br /> DETECTION LIMIT <br /> CALCULATED GROUNDWATER <br /> 0.002 GRADIENT DIRECTION AND �ALISTO ENGINEERING GROUP w <br /> MAGNITUDE IN FOOT PER FOOT WALNLr CREEK, CALIFORNIA <br />