17. An underground mine in which work is in progress shall be equipped with the following minimum equipment:(1) 6 units of self-contained pressurized oxygen breathing apparatus, a minimum utilization time of 60 minutes and a respiratory capacity of 30 litres per minute (1.06 ft3 per minute);
(2) a direct reading apparatus for evaluation of gases including at least carbon monoxide, nitrogen dioxide, oxygen and combustible gas sensors; in addition, that apparatus or another apparatus must be equipped with sensors of other gases according to the risks inherent in the underground mine;
(3) a positive pressure oxygen therapy apparatus capable of supplying oxygen for medical use at a constant flow of at least 10 litres (0.35 ft3) per minute for a duration of not less than 25 minutes;
(4) (paragraph revoked);
(5) a basket-shaped stretcher whose content complies with the latest edition of the Manuel de formation en sauvetage minier of the Commission des normes, de l’équité, de la santé et de la sécurité du travail;
(6) an appropriate rope system allowing a victim to be evacuated from an excavation opening at an angle exceeding 45° from the horizontal.