In any tunnel classified as gassy by the division, ventilation shall include continuous exhausting of fumes and air, unless an alternative ventilation plan which is as effective or better is approved by the division. Fans for this purpose shall be located at the surface, and shall be reversible from a single switch at the portal or shaft. These requirements shall not preclude the use of auxiliary fans to supply more air or greater exhaust to a tunnel or underground mine.
Cal. Lab. Code § 7974
Gassy and Extrahazardous Tunnels
Known as the The Tom Carrell Memorial Tunnel and Mine Safety Act
The act spans §§ 7950–8004 (52 sections).
Added by Stats. 1972, Ch. 1430.
Official source: California Legislative Information. Reproduced from public-domain California statutes; confirm against the official source for the current text. Not legal advice.