The capital costs of an air stripper include the costs of the tower shell, packing, tower internals, air delivery system, electrical equipment and controls, housing, design, and contingencies. The addition of an air treatment system roughly doubles the cost of an air stripping system (Lenzo and Sullivan 1989; U.S. EPA 1986a). The cost depends on the flow rate, volatility of the contaminant, concentration, and removal efficiency. Costs vary from $0.07-0.70/1000 gal for Henry's law coefficients of 0.01-1.0 to $7.00/1000 gal for Henry's law coefficients lower than 0.005 (Adams and Clark 1991).

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