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• i i <br /> FIGURE 7 <br /> MW-4 TPHg, Benzene & MTBE Concentrations & Groundwater elevations vs. Time <br /> Chevron Service Station 9-9840 ` <br /> 4344 Waterloo Road <br /> Stockton, California <br />� <br /> 100000 -2000 <br /> Note Non-detect(ND)graphed at one-half detection limits per US-EPA <br /> protocols Refer to Tables 1 and 2 for source data <br /> -2500 <br /> 10000 - <br /> _j <br /> -3000 <br /> 0 <br /> *' <br /> 1000 c <br /> o <br /> c <br /> m <br /> -35 00 m <br /> 0 <br /> W <br /> v � <br /> 0 100 3 <br /> L V <br /> o <br /> -4000 <br /> 0 <br /> 10 - <br /> -4500 <br /> 0 -4500 <br /> 0 1 -50 00 <br /> O O O O O O O o o a O <br /> tri -4 O v 4 -s V 46 -4 o <br /> O O O O O s s N <br /> O N O O N O (fl U1 W 4%. U1 V <br /> O O O O O O O O O O O O Q O <br /> N N N W W W W 4 4 (1 M (Jt (S1 <br /> Date Measured/Sampled <br /> --a—MTBE )K TPH-G —*—Benzene +GWE Screen Interval <br /> P 1ChentslChevronTexaco\Chevron Management Transferl9-98401GWMITables\Hydrographs 9-9840 <br />