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SECOINTERNATIONAL INCORPORATED <br /> SE C G R `M1ww.secorcom <br /> DATA MANIPULATION ND CALCULATIONS <br /> ' The concentration of KIVIr 04 in the sample is determined from the UV-vis analysis. Multiply the <br /> observed concentration b I the dilution factor to get the sample concentration. Subtract the <br /> solution concentration fro n the initial concentration (3.95 g/L or 3950 mg/L) and multiply the <br /> total volume used per sar iple (10 mL or 0.10 L according to the method above) times the <br /> difference. Plot the loss f KMn04 mass versus time sampled to evaluate the rate of oxidant <br /> demand. The oxidant clei nand is reported in grams of oxidant per kilogram per day. <br /> Sample calculation: (UNITS ARE IN BOLD) <br /> 0.152 * {([initial conc. - m /L]—[sample conc.- mg/L]) * (volume in VOA - L)}/{(time - days) <br /> ' (dry soil mass - kg)} <br /> = SOXD- MG 02/(KO SC IL* DAY) <br /> ' The term 0.152 is the conversion factor to convert equivalents of potassium permanganate to <br /> equivalents of oxygen. If chemical oxidation is required and the mass of permanganate <br /> required to treat a soil is d sired, then the 0.152 factor can be left out and the results will be <br /> reported in milligrams of potassium permanganate per kilogram soil day. <br /> 1 <br /> ' 6 <br />