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 D - Filtering facepiece respirators and medical evaluations - 04/24/2018
- 1910.134 App D - Use of smoke escape hoods meeting the ANSI-ISEA standard - 08/11/2010