UNITED STATES STEEL CORPORATION, AND YOUNGSTOWN SHEET AND TUBE COMPANY, PETITIONERS, v. UNITED STATES ENVIRONMENTAL PROTECTION AGENCY, RESPONDENT. Nos. 78-1563, 78-1564.United States Court of Appeals, Seventh Circuit.Argued April 18, 1979. Decided August 1, 1979. Page 284 Laurence A. McHugh, James T. Harrington, Chicago, Ill., for petitioner. Ronald C. Hausmann, U.S. Environmental Protection Agency, Washington, D.C., […]