800. Precautions relating to explosive atmospheres in mines.

800.     Precautions relating to explosive atmospheres in mines.

The mine operator1 must ensure that: (1) there are in place in the places classified as hazardous zones2, specific arrangements to detect the presence, and monitor the concentration, of flammable gas; and (2) measures are taken to reduce the level of flammable gas in any zone in which it has been detected to as low a level as is reasonably practicable3.

The mine operator must ensure that when in any zone, or at any place within a zone, classified as hazardous4: (a) the concentration of a flammable gas exceeds 25%