EOS® treatment can result in a temporary sorption of the contaminants into the oil phase, a clearly beneficial effect. Biodegradation does not occur in the oil, but the sorption can retard migration of the contaminant, especially DNAPL. Years of laboratory and field research have shown that, over time, contaminants are eventually released from the sorbed phase to the aqueous phase as biodegradation in the aqueous phase proceeds. The overall effect is to keep the contaminants in the area that has been enhanced, lowering the potential for migration out of the treatment zone.
