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This information is provided free of charge by the Department of Industrial Relations from its web site at www.dir.ca.gov. These regulations are for the convenience of the user and no representation or warranty is made that the information is current or accurate. See full disclaimer at https://www.dir.ca.gov/od_pub/disclaimer.html.
 
Subchapter 7. General Industry Safety Orders
Group 16. Control of Hazardous Substances
Article 107. Dusts, Fumes, Mists, Vapors and Gases
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§5149. Oxygen Deficiency.


Except in extreme emergency involving imminent peril to life, employees shall not be permitted to work without approved respiratory equipment where the oxygen content of the air is less than 19 1/2 percent by volume (dry basis).

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