- a) Any emissions unit that emits or has the potential to emit 100 tpy or more of the PAL pollutant in an attainment area; or
- b) Any emissions unit that emits or has the potential to emit the PAL pollutant in an amount that is equal to or greater than the major source threshold for the PAL pollutant as defined by the CAA for nonattainment areas.
"Major emissions unit" means:
(Source: Added at 49 Ill. Reg. 6237, effective April 23, 2025)