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Conclusions ! <br /> ■ At the apparent degradation rate of 90 kg in 20 weeks, <br /> we project that it will take approximately 3 years to <br /> degrade the estimated 700 kg secondary source. <br /> ■ It appears that at low injection rates (5 g/h-r in this <br /> investigation) soil oxidant demand is not a significant <br /> consumer of ozone. <br /> ■ Further investigation needs to be performed on the <br /> relationship between high/low injection rates and ` <br /> soil/groundwater oxidant demands. <br /> ■ These results show that ozone spaxging is very effective <br /> at remediating sorbed-phase petroleum hydrocarbons. <br />