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

Full text
104.1. In a raise:
(1)  notwithstanding section 104, the ventilation flow in the work station shall supply at least 5 changes of air per hour;
(2)  ventilation shall be supplied by means of a compressed air pipe that is:
(a)  less than 6.1 m (20 ft) from the heading;
(b)  equipped with a muffler;
(c)  directed towards the heading;
(d)  independent of any compressed air pipe supplying a drill or other pneumatic tool.
O.C. 782-97, s. 15.