"Cleaning materials" mean any materials used for cleaning an emission unit; cleaning tools, equipment or other items used with the emission unit; cleaning the walls or area in which the emission unit is located; or cleaning personnel; or materials used for other cleaning activity associated with an emission unit.
Ill. Admin. Code tit. 35, § 211.1070
Added at 18 Ill. Reg. 1253, effective January 18, 1994