Specific requirements for qualitative fit testing are detailed in the Occupational Safety and Health Administration’s (OSHA’s) Respiratory Protection Standard, 29 Code of Federal Regulation (CFR) 1910.134 Appendix A – Fit Testing Procedures (Mandatory). All respirators that rely on a mask-to-face seal must be fit tested to validate the seal is air-tight. This fit test must be performed:
- prior to first issue,
- when there's a change in the model, style or size of respirator used,
- when there's a physical facial change in the person wearing the mask, and
- at least annually
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