Work Classification
OSHA has established a classification system for asbestos construction work that spells out mandatory, simple, technological work practices that employers must follow to reduce worker exposures.
Under this system, the following four classes of construction work are matched with increasingly stringent control requirements:
Class I asbestos work is the most potentially hazardous class of asbestos jobs. This work involves the removal of asbestos-containing thermal system insulation and sprayed-on or troweled-on surfacing materials.
Class II work includes the removal of other types of ACM that are not thermal system insulation, such as resilient flooring and roofing materials. Examples of Class II work include removal of asbestos-containing floor or ceiling tiles, siding, roofing, or transite panels.
Class III asbestos work includes repair and maintenance operations where ACM or presumed ACM (PACM) are disturbed.
Class IV work includes custodial activities where employees clean up asbestos-containing waste and debris produced by construction, maintenance, or repair activities. This work involves cleaning dust-contaminated surfaces, vacuuming contaminated carpets, mopping floors, and cleaning up ACM or PACM from thermal system insulation or surfacing material.
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9-10. Which class of asbestos work is the most potentially hazardous?
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