Asbestos is present in many occupational settings. The level of precautions that need to be observed varies with the risk of exposure.

Worker selection: asbestos known or presumed to be present


Work Description


work likely to aerosolize asbestos fibers (removal of thermal steam insulation containing asbestos; resurfacing or cutting asbestos containing materials)

Class I

removal of other asbestos containing materials (wallboard, floor tiles, shingles, etc)

Class II

repair and maintenance duties likely to disturb asbestos containing materials

Class III

maintenance and custodial duties unlikely to disturb asbestos or presumed asbestos containing material

Class IV


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