35 Ill. Adm. Code 203.122
Emissions Unit
Section 203
Section 203.122 Emissions
Unit
"Emissions unit" means
any part of a stationary source which emits or has the potential to emit any
air pollutant subject to regulation under the Act or this Chapter or by the
United States Environmental Protection Agency under the Clean Air Act (42
U.S.C. 7401 et seq.).