Section 203.2330  Setting the 10-Year Actuals PAL Level

a)         Except as provided in subsection (b), the actuals PAL level for a major stationary source shall be established as the sum of the baseline actual emissions (as defined in Section 203.1070) of the PAL pollutant for each emissions unit at the stationary source, plus an amount equal to the applicable significant level for the PAL pollutant under Section 203.1370 or under the CAA, whichever is lower. When establishing the actuals PAL level, for a PAL pollutant, only one consecutive 24-month period must be used to determine the baseline actual emissions for all existing emissions units. However, a different consecutive 24-month period may be used for each different PAL pollutant. Emissions associated with units that were permanently shut down after this 24-month period must be subtracted from the PAL level. The Agency shall specify a reduced PAL level or levels in tons per year in the PAL permit to become effective on the future compliance date or dates of any applicable federal or State regulatory requirement or requirements that the Agency is aware of prior to issuance of the PAL permit. For instance, if the source owner or operator will be required to reduce emissions from industrial boilers in half from baseline emissions of 60 parts per million NO_X to a new rule limit of 30 parts per million, then the permit shall contain a future effective PAL level that is equal to the current PAL level reduced by half of the original baseline actual emissions of such unit or units.

b)         For newly constructed units (which do not include modifications to existing units) on which actual construction began after the 24-month period, in lieu of adding the baseline actual emissions as specified in subsection (a), the emissions must be added to the PAL level in an amount equal to the potential to emit of the units.

(Source:  Added at 49 Ill. Reg. 6237, effective April 23, 2025)