| The Occupational Health and Safety Act | | | | designated substances such as |
| of Ontario, for instance, states that | | | | Acrylonitrile, Arsenic, Asbestos, |
| asbestos is classified as a designated | | | | Asbestos - Construction, Building and |
| substance in some workplaces. Hence | | | | Repair, Benzene, Coke Oven Emissions, |
| employers are obliged to provide safety | | | | Ethylene Oxide, Isocyanates, Lead, |
| measures when they use a designated | | | | Mercury, Silica and Vinyl Chloride among |
| substance like asbestos. | | | | others. |
| The employer can only keep the amount of | | | | The Occupational Health and Safety Act |
| asbestos dust low, in order to reduce | | | | mentioned states that the employer has |
| the possibilities of its workers of | | | | to review the work methods and assess |
| getting ill due to asbestos fibers | | | | the likelihood of worker exposure, when |
| inhalation or swallowing. | | | | a designated substance such as asbestos |
| Designated Substances are hazardous | | | | is present in the workplace. |
| substances that can be a biological, | | | | The control program, when there are risk |
| chemical or physical agent or | | | | of worker exposure to hazardous minerals |
| combination thereof prescribed as a | | | | like asbestos that can produce |
| designated substance to which the | | | | asbestosis or another asbestos-related |
| exposure of a worker is prohibited, | | | | diseases, must include engineering |
| regulated, restricted, limited or | | | | controls, work practices, hygiene |
| controlled. Some regulations specify | | | | practices, record keeping and medical |
| different procedures to control | | | | surveillance. |