TRUCK DRIVERS HELPERS UNION, LOCAL NO. 170, PETITIONER, v. NATIONAL LABOR RELATIONS BOARD, RESPONDENT. GIRARDI DISTRIBUTORS, INC., INTERVENOR. No. 92-1993.United States Court of Appeals, First Circuit.Heard February 2, 1993. Decided May 26, 1993. Page 991 [EDITORS’ NOTE: THIS PAGE CONTAINS HEADNOTES. HEADNOTES ARE NOT AN OFFICIAL PRODUCT OF THE COURT, THEREFORE THEY ARE NOT DISPLAYED.] […]