"Non-contact process water cooling tower" means a towerlike device in which water is cooled by contact with atmospheric air and evaporation, where such water has been or will be used for cooling of a process stream where VOM is present without intentional direct contact of the cooling water and process stream.
Ill. Admin. Code tit. 35, § 211.4050
Amended at 18 Ill. Reg. 1253, effective January 18, 1994