(3) How long does it take to remediate a site using ozone?

Cleanup time is much quicker than traditional remediation methods, including pump & treat, SVE/air sparging, and bioremediation. Most projects can be completed in several months, and some sites with small problems can be cleaned up using just a few daily injections. Cleanup duration depends largely upon the total mass of contaminants present and the ability to distribute the ozone through the treatment zone at your site. Ozone is primarily an oxidation technology, whereas we need to inject enough oxidant to react with site contaminants. Cleanup time depends upon the total mass of contaminants present in soil, & groundwater (including adsorbed phase contamination within the saturated zone - an often understudied zone of contamination). Based on the total mass of contamination present at a site, the time frame for remediation also depends upon the capacity of ozone/oxygen being injected per day, and the site cleanup goals.

Example: Using a 5 lb/day ozone injection system, a 20x20x10 section of soil containing 20 pounds of gasoline contaminants will take ~ twice as long to remediate compared to a similar sized site containing 40 pounds of contaminants. Other factors that affect a remediation project duration include the density of injection points, type of contaminant, and the interaction between oxidation and bioremediation at a site. BLUE can assist any client in estimating site mass, remedial costs and duration.
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