Handbook for Methane Control in Mining - AMMSA

(5) If the concentration is 0.5 per cent or greater but not more than 1.0 per cent, all of the precautionsset out in subsection (4) shall be taken and the electrical equipment, diesel engines,tools and other material used in the workplace shall be designed to function safely in a flammablegas atmosphere. O. Reg. 236/99, s. 3.(6) If concentrations of flammable gas exceed 1.0 per cent in an area, all of the following precautionsshall be taken:1. All sources of ignition in the affected area shall be eliminated.2. All electrical equipment in the affected area shall be de-energized.3. All persons, other than competent persons necessary to measure the concentration offlammable gas and to make ventilation changes, shall be removed from the affected area.O. Reg. 236/99, s. 3.(7) In mines where flammable gas is known to occur, workers who are underground or diamonddrillers who are on the surface shall be advised of,(a) the probability of encountering a flow of the gas; and(b) the measures and procedures prescribed in this section. O. Reg. 236/99, s. 3.(8) For the purposes of this section, the concentration of flammable gas means the percentage,by volume, of flammable gas in the general atmosphere. O. Reg. 236/99, s. 3.167