Pursuant to 29 C.F.R. § 1910.134(f) employees are required to be fit tested prior to wearing tight-fitting respirators and the fit test administered must be using an OSHA-accepted fit test protocol.

Or any other condition that may interfere with face piece seal. 9.0.1. The test subject shall be shown how to put on a respirator, proper positioning on the face, and how to set strap tension.