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test Thus, the SOD measurements may more accurately reflect the SOD of background <br /> soil rather than impacted soil <br /> The SOD and GWODoZ results are consistent with the ozone demand observed in the <br /> Hydrocarbon Removal test (Section 3 2) The total ozone demand of the Hydrocarbon <br /> Removal test (500 mg 03) was calculated using the measured SOD and GWODo, and the <br /> amount of soil and groundwater used in the Hydrocarbon Removal test as follows <br /> Total ozone Demand, mg 03 = (SOD)(mass soil) + GWODoZ(volume water) <br /> = (700 mg 03/kg)(0 2 kg soil)+ (180 mg 03/L)(2L) = 500 mg 03 <br /> A dose of 2,700 mg 03 (15 mg/L for 6 hrs at a flowrate of 500 mL/min), wluch is 5 4 <br /> times the estimated requirement, was applied over the course of in the Hydrocarbon <br /> Removal test and resulted in > 99% removal of most COCs from the aqueous phase <br /> (most of which was due to destruction, not volatilization) The excess 03 applied was <br /> probably either unneeded (the Hydrocarbon Removal test may have run longer than <br /> necessary) or left the reactor before it could be react This confirms that the measured <br /> oxidant demands of soil and groundwater can be used to obtain a good first <br /> approximation of the amount of ozone needed <br /> 700 <br /> 6 00 -~4~~Control B <br /> -0-26 mLIL A <br /> ci 500 <br /> aM -0-26 mUL B <br /> E <br /> c <br /> 400 - <br /> 300 <br /> c <br /> m <br /> E <br /> a <br /> N <br /> 200 <br /> 100 <br /> 000 <br /> 0 50 100 150 200 250 <br /> Time,minutes <br /> Figure 1. Groundwater Ozone Demand of IP Groundwater. Ozone Remaining. <br /> PRIMA Environmental 21 Eva]of Peroxone <br /> June 1,2005 ETIC-Exxon#F3942 <br />