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

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4.8.1. After blasting, the shot-firer must be the first to enter the blasting area to make sure it is safe. For that purpose, the shot-firer must
(a)  wait for the smoke to dissipate;
(b)  make sure, using a device to measure the concentration of carbon monoxide, that the carbon monoxide concentration is below the exposure limit values indicated in Schedule I to the Regulation respecting occupational health and safety (chapter S-2.1, r. 13);
(c)  examine the work site;
(d)  look for possible misfires, blowouts and bootlegs;
(e)  mark those found.
R.R.Q., 1981, c. S-2.1, r. 6, s. 4.8.1; O.C. 1959-86, s. 67; O.C. 57-2015, s. 55.
4.8.1. The employer shall ensure that after a shot has been fired with a safety fuse, no one returns to the scene before a number of minutes equal to 6 times the number of metres in the longest length of fuse used in the blasting.
R.R.Q., 1981, c. S-2.1, r. 6, s. 4.8.1; O.C. 1959-86, s. 67.