Hydrogen peroxide and catalyst solutions needed for Fenton's Reagent are usually added to the treatment area by pressure injection into one or more designated chemical oxidation injection wells, or gravity injection into one or more monitoring or other wells. In pressure injection, compressed air is used to sparge the ferrous iron catalyst and relatively large volumes of peroxide solution (., hundreds to thousands of gallons) into the contaminated soil and groundwater over a short period of time (., days). The sparged air forces the chemical reactants down the injection well point(s) and out into the impacted saturated soil. This is an aggressive approach that poses.
