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

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3.21.4. The employer must install a ventilation system powerful enough to ensure compliance with the concentrations prescribed in paragraphs a, b, c, and d of section 3.21.2 in and around the confined space.
O.C. 1959-86, s. 28; O.C. 329-94, s. 71.