S-2.1, r. 4 - Safety Code for the construction industry

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8.4.7. Storage:
(1)  Explosives and detonators may be stored in an underground job site only if they are kept in a depot or powder house. This depot must be situated at least:
(a)  750 m from a blasting area;
(b)  450 m from the firing switch;
(c)  90 m from the shaft or work zone; and
(d)  7.5 m from a travelway.
(2)  There must be at least one right angle turn in the pathway which connects the storage area with any work zone or travelway.
R.R.Q., 1981, c. S-2.1, r. 6, s. 8.4.7; O.C. 1959-86, s. 77.