9 O.S.H. Cas.(bna) 1508, 1981 O.S.H.D. (Cch) P 25,351 Asarco, Inc., the Bunker Hill Company, Koppers Company, Inc., Magma Copper Company and Phelps Dodge Corporation v. Occupational Safety and Health Administration, United States Department of Labor, the Anaconda Company and Kennecott Copper Corp. v. Occupational Safety and Health Administration, United States Department of Labor, General Motors Corporation and Chrysler Corporation v. Occupational Safety and Health Administration, United States Department of Labor

647 F.2d 1 9 O.S.H. Cas.(BNA) 1508, 1981 O.S.H.D. (CCH) P 25,351 ASARCO, INC., The Bunker Hill Company, Koppers Company, Inc., Magma Copper Company and Phelps Dodge Corporation, Petitioners, v. OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION, United States Department of Labor, Respondent. The ANACONDA COMPANY and Kennecott Copper Corp., Petitioners, v. OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION, United States Department of Labor, Respondent. GENERAL MOTORS CORPORATION and Chrysler Corporation, Petitioners, v. OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION, United States Department of Labor, Respondent. Nos. 78-1959, 78-2764, 78-3038, 78-2477 and 78-2478. United States Court of Appeals, Ninth Circuit. Decided April 7, 1981. As Amended May 15, 1981. Ralph J. Moore, Jr., Shea & Gardner, Washington, D.C., Alfred V. J. Prather, Prather, Seeger, Doolittle & Farmer, Washington, D.C., Walter B. Connolly, Pepper, Hamilton & Scheetz, Washington, D.C., on brief for petitioners. Ann D. Nachbor, Dennis K. Kade, Washington, D.C., Bernard Kleiman, Chicago, Ill., on brief, for respondent. George H. Cohen, Stephen P. Berzon, Washington, D.C., James D. English, Pittsburgh, Pa., for…