Nos. 82-1418 to 82-1420, 82-1743, 82-1589 and 82-1940. Argued May 5, 1983. Decided June 30, 1983. George H. Cohen, with whom Laurence Gold, Washington, D.C., was on brief, for petitioners, Oil, Chemical and Atomic Workers, Local Union No. 6-418, AFL-CIO, et al. George J. Tichy, II, San Francisco, Cal., with whom Robert K. Carrol, San Francisco, Cal., for petitioner, Borden Chemical, A Division of Borden, Inc. Howard A. Crawford, with whom Jack D. Rowe, Kansas City, Mo., was on brief, for petitioner