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

Section 87 Disposition versions

2012-09-01

87. The fresh air introduced underground may not be contaminated by air previously exhausted from the mine or by any other fixed source of contamination present on the mine site.

Notwithstanding the foregoing, where the fresh air introduced underground is heated directly by a flame, the following conditions shall be satisfied:

(1)  the heating system shall comply with CGA/CAN1 3.7-1977 Direct Gas-Fired Non-Recirculating Make-up Air Heaters;

(2)  the entire installation shall comply with the Regulation respecting gas and public safety (R.R.Q., 1981, c. D-10, r. 4), as well as with CAN/CGA-B149.1-M91 Natural Gas Installation Code, where natural gas is used as fuel, or CAN/CGA-B149.2M91 Propane Installation Code, where propane is used as fuel;

(3)  a combustible gas detector shall be installed to ensure the cut-off of combustible gas to the burner where the gas used as fuel could make its way into the mine;

(4)  an environmental monitor shall be installed to ensure that the carbon monoxide concentration in the air exhausted by the main burners in working condition does not at any time exceed the concentration indicated in Table II of Schedule A to CGA/CAN1 3.7-1977 Direct Gas-Fired Non-Recirculating Make-up Air Heaters;

(5)  a carbon monoxide concentration reading shall be taken at least once weekly and shall be recorded in a register, except where it is recorded on a graph or in a computer system.

For the purposes of the first paragraph, a system that automatically shuts off the fresh air supply fan must be installed when the monitor referred to in subparagraph 4 of the second paragraph indicates that the carbon monoxide concentration exceeds 11.4 mg/m3 (10 ppm).

O.C. 213-93, s. 87; O.C. 782-97, s. 9; O.C. 119-2006, s. 7.