#	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), 1910.134(i)(1)(ii), 1910.134(i)(4)(iii), 1910.134(i)(5)(ii) - Clarifications for breathing air quality and use
2	08/13/1999 - 1910.134(i) - 1910.134(i) does not apply to portable breathing air compressors.
3	04/25/1994 - 1910.134(i) - Breathing air: testing and carbon monoxide alarm.
4	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.