If the level of gas in any tunnel or underground mine reaches 20 percent of its lower explosive limit at any time all men shall be removed, the division notified immediately by telephone or telegram, and no one shall reenter the tunnel or underground mine until approval is given by the division.
Cal. Lab. Code § 7972
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.