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Table 4 Summary of Groundwater Extraction System Data, ARCO Station 2133, Stockton, California <br /> Sampli.Lalculations <br /> Removal rate calculation <br /> lbs removed=("x"ug/L)*(gram/1,000 000 pg)*(1b/454 grams)*(3 78 Vgal)*(gallons pumped) <br /> where"x" is influent concentration <br /> ro calculate pounds removal for a reporting period it sevual sampling events occurred in one period,we used tile effluent concentrations <br /> that had the.highest IPII value <br /> Gallons removal calculation(for TPH) <br /> gallons removed=lbs*gallon/6 2 lbs(density for MI is 6 2,however,for Benzene its 7 32) <br /> I <br />