Whenever gas levels in excess of 10 percent of the lower explosive limit are encountered initially in a tunnel or underground mine classified as gassy, the division shall be notified immediately by telephone or telegraph. The chief of the division or his authorized representative may waive subsequent notification for gas readings less than 20 percent of the lower explosive limits upon a finding that adequate ventilation and other safety measures are provided to assure employee safety.

(Added by Stats. 1972, Ch. 1430.)

Terms Used In California Labor Code 7967

  • Division: means the Division of Occupational Safety and Health. See California Labor Code 7951
  • Lower explosive limit: means the lowest concentration at which a gas or vapor can be ignited or will explode. See California Labor Code 7951
  • Mine: means any excavation or opening above or below ground used for removal of ore, minerals, gravel, sand, rock, or other materials intended for manufacturing or sale. See California Labor Code 7951
  • Tunnel: means an underground passageway, excavated by men and equipment working below the earth's surface, that provides a subterranean route along which men, equipment, or substances can move. See California Labor Code 7951
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