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TABLE 12 <br /> SENSITIVITY ANALYSIS, IMPACTED SOIL <br /> FLAG CITY CHEVRON <br /> 6421 Capital Avenue, Lodi, California <br /> MTBE Concentration Consequence <br /> Input Parameter (mg/kg) Change <br /> CSA Well MW-10 <br /> ND at screened interval,but <br /> Increasing Gradient up to detectable concentrations may be ND at MW-IOC and deeper <br /> Hydraulic Gradient UCL 0 O1 ftlft present in ground water interval intervals, detected(0 7-52 µg11)in <br /> from 0-50 feet at gradients of 0 005 wells MW-l0A&B <br /> ft/ft and greater <br /> ND at all depths(from 15 to 160 feet 0 179 mg/kg UCL soil can impact <br /> MTBE Concentration 0 179 - 100 Increasing Concentration bsg) for average soil MTBE MW-10A at 3 µg11 <br /> concentration of 100 mg/kg <br /> Aquifer Soil Type UCL Increasing Coarseness ND for soil ranging from silty sand ND for fine-grained soil(clays to <br /> to gravel silty sand) <br /> ND for all depths from 15 feet bsg to ND at M W-1 OB and deeper <br /> Screened Interval Maximum Decreasing Depth total well depth intervals,detected(9 7 µg/1)at MW- <br /> l0A interval <br /> Notes <br /> mg/kg -Milligrams per Kilogram <br /> µg/1 -Micrograms per Liter <br /> UCL -Upper Confidence Limit <br /> ND -Not detected(<0 Spg/l) <br /> Maximum -Maximum concentration in soil of 0 57 mg/kg <br /> Advanced Geolnvironmental,Inc <br />