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

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146. As of 1 April 1993, it is prohibited to install a diesel engine or boiler at a distance of less than:
(1)  15 m (49.2 ft) from a surface opening of an underground mine used as an air exhaust;
(2)  25 m (82 ft) from a surface opening of an underground mine used as an air intake;
(3)  15 m (49.2 ft) from a building covering a surface opening of an underground mine.
O.C. 213-93, s. 146; Erratum, 1993 G.O. 2, 2603.