"Reasonable Further Progress" means the annual incremental reductions in the emissions of the applicable air pollutant as determined by USEPA pursuant to Part D of the Clean Air Act ( 42 U.S.C. 7501 et seq.) and federal regulations adopted pursuant thereto.
Ill. Admin. Code tit. 35, § 203.131
Amended at 12 Ill. Reg. 6118, effective March 22, 1988