Abstract
A targeted treatment program utilizing in situ chemical oxidation was used to remediate diesel fuel-derived petroleum compounds in unsaturated and saturated soils at a historic railroad facility. This program consisted of multiple injections at varying depths within temporary Geoprobe® injection points. The actual treatment time was less than 3 months. Overall concentrations of volatile and semivolatile organic petroleum compounds were reduced by approximately 70%, while the total petroleum hydrocarbon concentration was reduced by nearly 50%. Treatment efficiency in unsaturated soil was similar to that in saturated soil. The results of the remedial program indicate that the effect of grain size of the subsurface materials on treatment efficacy is significant. The project has shown that the use of this technology can be as effective as other in situ treatment technologies used for treating subsurface diesel fuel contamination.
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