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of Mn04- could be of concern because manganese has a secondary maximum <br /> contaminant level of 50 pg/]L and because oxidation of trivalent chromium to Cr(VI) by <br /> Mn04` is well-established However Mn04 will likely be converted rapidly back to <br /> MnO2 once in contact with untreated soil Formation of nitrate could be of concern <br /> because nitrate has an MCL of 44 mg/L (as nitrate) Precipitation of iron could be an <br /> issue if the particles reduce the permeability of the aquifer <br /> 1.3 Study Objectives <br /> The specific goals of the bench-scale testing were to <br /> • estimate the ozone demand of soil, <br /> • estimate the longevity of H2O2 in the presence of ozone, <br /> • confirm removal of hydrocarbons by ozone and by Peroxone and determine <br /> whether removal is due to volatilization or destruction, <br /> • measure the effect of ozone and Peroxone on secondary water quality parameters <br /> including pH, bromate, and hexavalent chromium, [Cr(Vl)], and <br /> • assess the potential fate of Cr(VI) to determine whether natural attenuation is <br /> likely <br /> PRIMA Environmental 3 Eval of Peroxone <br /> June 1,2005 ETIC-Exxon#3442 <br />