Commonwealth Edison Co. v. Pollution Control Board

Mr. PRESIDING JUSTICE McNAMARA

delivered the opinion of the court:

In 1971, the Federal Environmental Protection Agency, acting under the Clean Air Act amendments of 1970 (42 U.S.C. § 1857 et seq. (1970), amending 81 Stat. 485 (1967)), adopted new primary and secondary ambient-air-quality standards. (42 C.F.R. § 410.1 et seq. (1971).) By its terms the States were required to devise their own implementation plans to achieve compliance with Federal standards. Accordingly, the Illinois Environmental Protection Agency (hereinafter the Agency), acting pursuant to section 4(j) of the Environmental…