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· OCCUPATIONAL EXPOSURE LIMITS
Ø Design
· SMOKING
Worker exposure to a hazardous substance must not exceed the exposure limit specified in the schedule in the regulation. The table below is excerpted from the schedule, and contains some common hazardous substances and their exposure limits. (Control of Exposure to Biological or Chemical Agents Regulation 833/90, 3, Schedule)
Chemical name |
8-hour exposure limit |
15-minute exposure limit |
Ceiling |
Acetic acid |
10 ppm |
15 ppm |
-- |
Acetone |
500 ppm |
750 ppm |
-- |
Ammonia |
25 ppm |
35 ppm |
-- |
Carbon black |
3.5 mg/m3 |
-- |
-- |
Carbon dioxide |
5,000 ppm |
30,000 ppm |
-- |
Carbon monoxide |
35 ppm |
400 ppm |
-- |
Ethyl acetate |
400 ppm |
-- |
-- |
Formaldehyde |
1 mg/m3 |
2 mg/m3 |
-- |
Hydrogen sulfide |
10 mg/m3 |
15 mg/m3 |
-- |
Isopropyl alcohol |
400 ppm |
500 ppm |
-- |
Sulfur dioxide |
2 ppm |
5 ppm |
-- |
The employer must take measures that are reasonably necessary to protect workers from exposure. Measures include engineering controls, work practices, hygiene facilities and the use of personal protective equipment (PPE). PPE can only be used to protect workers from exposure when other measures are not practicable. (Control of Exposure to Biological or Chemical Agents Regulation 833/90, 6-7)
Fresh make-up must be tempered to maintain the temperature at greater than 18oC, must be free of contaminants, must not cause drafts, and must not spread dust. (Industrial Establishments Regulation 851/90, 128)
A workplace must be adequately ventilated so the atmosphere does not endanger workers. (Industrial Establishments Regulation 851/90, 127)
Smoking is not allowed in the workplace. (Smoke-Free Ontario Act and regulations)
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