Asarco, Inc. v. Occupational Safety and Health Administration, United States Dept. Of Labor, United Steelworkers of America, Afl-Cio, and Chemical Manufacturers Assoc., Intervenors. Anaconda Minerals Company, and Kennecott Copper Corporation v. Occupational Safety and Health Administration, United States Department of Labor, United Steelworkers of America, Afl-Cio, and Chemical Manufacturers Assoc., Intervenors

746 F.2d 483 14 Envtl. L. Rep. 20 ,901, 11 O.S.H. Cas.(BNA) 2217, 1984-1985 O.S.H.D. ( 27,053 ASARCO, INC., et al., Petitioners, v. OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION, United States Dept. of Labor, Respondent, United Steelworkers of America, AFL-CIO, and Chemical Manufacturers Assoc., Intervenors. ANACONDA MINERALS COMPANY, and Kennecott Copper Corporation, Petitioners, v. OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION, United States Department of Labor, Respondent, United Steelworkers of America, AFL-CIO, and Chemical Manufacturers Assoc., Intervenors. Nos. 78-1959, 78-2764 and 78-3038. United States Court of Appeals, Ninth Circuit. Argued and Submitted Oct. 12, 1983. Decided Sept. 13, 1984. Amended Opinion Oct. 30, 1984. Frederick C. Schafrick, Ralph J. Moore, Jr., Shea & Gardner, Washington, D.C., William O. Hart, New York City, for ASARCO, Inc. Alfred V.J. Prather, Kurt E. Blase, Prather Seeger Doolittle & Farmer, Washington, D.C., for Kennecott. Seth Goldberg, Timothy B. Atkeson, Steptoe & Johnson, Chartered, David F. Zoll, Manufacturers Association, Washington, D.C., for Chemical Mfrs. Assoc. Dennis K. Kade, Frank X. Lilly, Frank A. White, Charles P.…