Nos. 89-70061, 89-70308

913 F.2d 1454 59 USLW 2212 , 119 Lab.Cas. P 10,783 , 5 Indiv.Empl.Rts.Cas. 1193, 5 Indiv.Empl.Rts.Cas. 1621, 14 O.S.H. Cas.(BNA) 1777, 14 O.S.H. Cas.(BNA) 1946, 1990 O.S.H.D. (CCH) P 29,079 , 1991 O.S.H.D. (CCH) P 29,391 INTERNATIONAL BROTHERHOOD OF ELECTRICAL WORKERS, LOCAL 1245; International Brotherhood of Electrical Workers, Local 465, et al., Petitioners, v. Samuel SKINNER, Secretary, U.S. Department of Transportation; Research & Special Programs Administration of the U.S. Department of Transportation, Respondents. The OIL, CHEMICAL AND ATOMIC WORKERS INTERNATIONAL UNION ("OCAWIU"), and Locals 1-219, 1-128 and 1-5, et al., Petitioners, v. DEPARTMENT OF TRANSPORTATION, National Transportation Safety Board, et al., Respondents. Nos. 89-70061, 89-70308. United States Court of Appeals, Ninth Circuit. Argued and Submitted June 6, 1990. Decided Sept. 12, 1990. As Amended Nov. 20, 1990. Carol R. Golubock, Service Employees Intern. Union, Victoria L. Bor, Sherman, Dunn, Cohen, Leifer & Yellig, P.C., Washington, D.C., Mary-Win O'Brien, United Steelworkers of America, Pittsburgh, Pa., John W. McKendree, Oil, Chemical and Atomic Workers Intern. Union, Lakewood, Colo., for…