35 Ill. Adm. Code 203.2280
Significant Emissions Unit
Section
203.2280 Significant Emissions Unit
"Significant emissions unit" means an emissions
unit that emits or has the potential to emit a PAL pollutant in an amount that
is equal to or greater than the applicable significant level (as defined in Section
203.1370 or in the CAA, whichever is lower) for that PAL pollutant, but less
than the amount that would qualify the unit as a major emissions unit as
defined in Section 203.2190.