Standard Interpretations
OSHA requirements are set by statute, standards, and regulations. Our interpretation letters explain these requirements and how they apply to particular circumstances, but they cannot create additional employer obligations. Each letter constitutes OSHA's interpretation of the requirements discussed. Note that our enforcement guidance may be affected by changes to OSHA rules. Also, from time to time we update our guidance in response to new information.
- 1910.134 App A - Appendix A requirements and techniques for fit testing respirators. - 08/27/1999
- 1910.134 App A - QLFT fit testing procedures - 03/18/2015
- 1910.134 App A - The grimace step in respiratory protection fit-testing procedures. - 01/04/1999
- 1910.134 App A - Use of multi-station electric pump nebulizer and the squeeze bulb Bitrex for QLFT. - 03/08/2001
- 1910.134 App A - When to use qualitative or quantitative fit testing; storing SCBAs on fire trucks. - 11/16/1998
- 1910.134 App A - When to use quantitative and qualitative fit testing. - 01/15/1999