#	Federal Register
1	05/22/2024 - 1910.134(i) - 89:45025-45026 - Vinyl Chloride Standard; Extension of the Office of Management and Budget's (OMB) Approval of Information Collection (Paperwork) Requirements - PDF

#	Letters of Interpretation
1	05/31/2023 - 1910.134(i)(5)(ii) - Clarifications for breathing air quality and use
2	05/31/2023 - 1910.134(i)(4)(iii) - Clarifications for breathing air quality and use
3	05/31/2023 - 1910.134(i)(1)(ii) - Clarifications for breathing air quality and use
4	05/31/2023 - 1910.134(i), 1910.134(i)(1)(ii), 1910.134(i)(4)(iii), 1910.134(i)(5)(ii) - Clarifications for breathing air quality and use
5	08/13/1999 - 1910.134(i) - 1910.134(i) does not apply to portable breathing air compressors.
6	02/05/1999 - 1910.134(i)(4)(ii) - Using a "generic type" certificate of analysis for Grade D breathing air.
7	07/05/1994 - 1910.134(i)(7) - Carbon Monoxide or High Temperature Alarm Requirement for Portable Breathing Air Compressors.
8	04/25/1994 - 1910.134(i) - Breathing air: testing and carbon monoxide alarm.
9	04/24/1986 - 1910.134(i)(8) - Couplings used in supplied air respirator systems.
10	10/15/1981 - 1910.134(i)(7) - Del-Monox air purifiers are unacceptable for testing carbon monoxide concentration for compressor breathing air.
11	07/14/1981 - 1910.134(i)(1)(i) - Cool-view welding helmets must meet Grade D breathing air requirements; Requirements for standard welding helmets.
12	03/06/1979 - 1910.134(i) - Respirator air quality standards do not apply where the NRC has jurisdiction

#	Regulations
1	04/20/2006 - - Respiratory protection.