English Canadian Centre for Occupational Health and Safety (CCOHS) hearing-icon Occupational Exposure Limits in Canada Exposure Limits www.ccohs.ca/oshanswers/phys_agents/exposure_can.html www.ccohs.ca/oshanswers/phys_agents/exposure_can.html Exposure Limits www.ccohs.ca/oshanswers/phys_agents/exposure_can.html