R11-1-407

Ariz. Admin. Code § R11-1-407

Air quality at underground working places

Effective Aug 18, 1980State Mine Inspector

Air at all active underground working places shall contain at least 19.5 volume percent oxygen.

Historical Note

Adopted effective April 7, 1976 (Supp. 76-2). Former Section R11-1-407 repealed, new Section R11-1-407 adopted effective August 18, 1980 (Supp. 80-4).