Ozone has been utilized in the water supply and wastewater treatment industries for decades as a means to treat or remediate a multitude of organic compounds. Only recently, however, has this proven treatment technology been tested in the in-situ environmental remediation arena. This paper presents, through the example of several case histories, information on the effectiveness of in-situ ozone treatment on remediating petroleum hydrocarbons, and a measure of the efficiency of the technology. In order to provide objective and quantifiable measures of effectiveness and efficiency; the rate of remediation, degree of contaminant reduction, mass of ozone required, finality of remedy, and repeatability are all considered.
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