Nos. 94-3490 94-3685 ARGUED OCTOBER 26, 1995 DECIDED JUNE 5, 1996 R. Ian Hunter (argued), Patricia M. Morrow, Troy, MI, for E L Transport Co. Julie B. Broido (argued), N.L.R.B., Washington, DC, Scott A. Gore, Elizabeth Kinney, N.L.R.B., Chicago, IL, Aileen A. Armstrong, Linda J. Dreeben, N.L.R.B., Appellate Court, Enforcement Litigation, Washington, DC, for N.L.R.B. Marvin Gittler, Susan Brannigan, Asher, Gittler, Greenfield, Cohen D'Alba, Chicago, IL, for intervenor-respondent. On Petition for Review