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2019 California Code
Labor Code - LAB
DIVISION 5 - SAFETY IN EMPLOYMENT
PART 9 - TUNNEL AND MINE SAFETY
CHAPTER 2 - Gassy and Extrahazardous Tunnels
Section 7974.
Universal Citation: CA Labor Code § 7974 (2019)
7974.
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.
(Added by Stats. 1972, Ch. 1430.)
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