S-2.1, r. 14 - Regulation respecting occupational health and safety in mines

Section 89 Disposition versions

2012-09-01

89. Main fans and auxiliary fans shall not recirculate air to ventilate an underground work station.

However, reuse of air in a main ventilation circuit or an auxiliary circuit is permitted under the following conditions:

(1)  the concentration of carbon monoxide in the ambient air must be measured at the inlet of each circuit where air is reused;

(2)  these measurements must be taken at least once a week during mucking operations carried out with diesel equipment and each time the ventilation equipment is altered; and

(3)  when the concentration of carbon monoxide exceeds 11.4 mg/m3 (10 ppm), a response plan must be implemented to reduce and maintain the concentration below that level.

The results of those measurements must be recorded in a register.

O.C. 213-93, s. 89; O.C. 42-2004, s. 3.