Asbestos is
considered to be a confirmed human carcinogen, meaning that it has the ability
to cause cancer in humans. Older buildings may contain asbestos. It was used in
light ballasts, insulation and in some floor tiles. If your facility contains
asbestos, you must comply with the regulations for asbestos.
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The employer must ensure that a worker’s exposure to a substance does not exceed the exposure limits specified by ACGIH and is as low as is practically attainable. The ACGIH limit is 0.1 fibers per cubic centimeter. (The exposure limit applies to fibers longer than 5 micrometers with a diameter less than 3 micrometers and an aspect ratio greater then 3:1.) (Occupational Health and Safety Regulation 1165/96, 51)
Where asbestos is present in a workplace in harmful concentrations, a worker must wear respiratory protection acceptable to the assistant deputy minister.
When asbestos-containing insulation is being removed, dust concentrations must be controlled by adequate local ventilation. The discharged air must be passed through a filter. (Occupational Health and Safety Regulation 1165/96, 51)
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