No. 85-7106. Argued and Submitted November 13, 1985. Decided March 25, 1986. David Rosenfeld, William A. Sokol. Van Bourg, Weinberg, Roger Rosenfeld, San Francisco, Cal., for petitioners. William Stewart, N.L.R.B., Washington, D.C., for respondent. Susan Ardissan, M. Armon Cooper, Lukens, St. Peter Cooper, San Francisco, Cal., for intervenor-respondent. Burger Pits, Inc. Appeal from the National Labor Relations Board. Before SNEED, KENNEDY and BOOCHEVER, Circuit Judges. BOOCHEVER, Circuit Judge.