Every establishment in which one or more persons is employed shall be so ventilated that all gases, vapors, dust, fumes, or any impurity injurious to health, whether generated in the course of the work carried on therein or otherwise, shall, so far as practicable, be rendered harmless.
Mass. Gen. Laws ch. 149, § 117
Ventilation
Official source: Massachusetts Legislature. Reproduced from public-domain Massachusetts statutes; confirm against the official source for the current text. Not legal advice.