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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 2. Safe Practices and Personal Protection
Article 7. Miscellaneous Safe Practices
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§3309. Drainage and Ventilation.


(a) Trenches, tunnels and pits inside buildings shall have proper drainage and ventilation, or other means of protecting employees who work in these areas shall be provided as required in Group 16 of these orders.

(b) Sewage tanks and sewage sumps inside buildings shall be tightly covered and ventilated with a suitable vent to the outside atmosphere so located as not to endanger the safety of employees.

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