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

Full text
154. It is prohibited to store combustible or inflammable substances less than 30 m (98.4 ft) from a surface opening of an underground mine or a building covering such an opening except if they are stored in a buried tank.
A sump having a capacity at least equal to that of the tank shall be installed beneath the tank to absorb any leakage from the storage facility.
O.C. 213-93, s. 154.