Environmental Protection Agency v. Pollution Control Board

U.S. Steel Corporation (the company) applied to the Illinois Environmental Protection Agency (the Agency) for operating permits for four blast furnaces located at its “South Works” in Chicago. The company sought review (Ill. Rev. Stat. 1977, ch. 111M, par. 1040) by the Pollution Control Board of the Agency’s denial, and the Board ordered the Agency to grant the permits. The Agency appealed to the appellate court (73 Ill. 2d R. 335), which reversed the Board (88 Ill. App. 3d 71), and we granted the company’s petition for leave to appeal.

This case involves the Board’s construction of Rule 203…