(1) Where, in connection with the carrying on of a process, there is given off dust, fumes or other impurities of such a character and to such an extent as to be likely to be injurious or offensive to employees in an industrial establishment, all practicable measures shall be taken by an employer or person in control to protect the employees against inhalation of the dust or other impurity and to prevent its accumulation in any workroom, and where the nature of the process makes it practicable, exhaust appliances shall be provided and maintained as near as possible to the point of origin of the dust or fumes or other impurity, so as to prevent contamination of the air in the workroom.