CFR 146F -Respiratory Protection Standard: Additional Ambient Aerosol CNC QNFT Protocols

OSHA has approved and added two additional condensation nuclei counting (CNC) quantitative fit test protocols in Appendix A of 29 CFR 1910.134: one for elastomeric full-face and half-mask respirators, and the other for filtering facepiece respirators (Federal Register).

The N.C. Commissioner of Labor adopted the revised federal rule verbatim with an effective date of February 14, 2020.