127. A refuge station shall(1) be constructed with non-combustible materials and have a fire resistance of at least one hour;
(2) be identified by notices posted approximately 20 m (65.6 ft) from the station;
(3) provide an area of at least 1 m2 (10.8 ft2) per worker needing to seek refuge there;
(4) be constructed so that it is airtight against smoke when the door is closed;
(5) be connected to the surface by a means of voice communication;
(6) have a source of drinking water;
(6.1) have at least 1 portable toilet;
(7) have a compressed air line complying with Division 8 of 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 or, if it is impossible because of permafrost conditions, have an oxygen supply system with regulated flow able to remove carbon dioxide from the ambient air according to the number of workers that the station can contain;
(7.1) not be supplied with air by a backup compressor located underground;
(8) have fire retardant sealant to seal any leak;
(9) have a notice board on which are posted a plan of the level, the air supply circuit of the mine and the rescue procedures;
(10) be equipped with an airlock in compliance with Division 8 of 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, as of 20 January 2011.
The system referred to in subparagraph 7 of the first paragraph shall(1) have a minimum range of 70 hours for the number of workers who may be present in the station;
(2) be the subject of a monthly preventive maintenance program whose results are entered in a register.