The Steelworkers Union sought to represent a unit composed of four occupational health nurses in an aluminum plant. The company argued that the nurses were managerial employees, exempt from the act, or in the alternative, professional employees who must be part of a bargaining unit of all the plant’s professional employees. The nurses’ primary responsibilities were treating employees’ injuries and illnesses, administering routine physical examinations to applicants and employees, and maintaining logs and records.

What additional facts did the NLRB need to decide the issues raised by the company? See Noranda Aluminum Inc. v. NLRB [751 F.2d 268, 118 L.R.R.M. 2136 (8th Cir. 1984)].