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F[ A <br />� O Al <br /> • EXCAVATION AREA <br /> 15 ■250 pm •�• ■ 110 <br /> I --r� --•-•• • ,_ppm <br /> 20 ' <br /> • � w 2,500 ppm ' .:._.•. <br /> 25 ESTIMATED 500 ppm TPH <br /> CONCENTRATION CONTOUR <br /> 471 <br /> 30 i 7,100 ppm <br /> • ESTIMATED 100 ppm TPH <br /> CONCENTRATION CONTOUR <br /> 35 <br /> 40 <br /> BRL . <br /> Figure 4-3. Cross Section A-A' Showing VcrLical Extent of Soil Contaminatlorn <br />