In any tunnel or underground mine classified extrahazardous a device or devices which automatically and continuously test the atmosphere for gases or vapors shall be maintained. Such device or devices shall be placed as near the face or area of operation as practical, but never more than 50 feet from such point. The division shall determine if additional monitors are necessary and where they should be located. This requirement shall apply only to tunnels or underground mines where excavation of material is by mechanical means.

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

Terms Used In California Labor Code 7984

  • Division: means the Division of Occupational Safety and Health. See California Labor Code 7951
  • Face: means the head of the tunnel where soil is being removed, or that area in a mine where digging is underway. 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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