definition of class iii asbestos work
Class II asbestos work means activities involving the removal of ACM which is not thermal system insulation or. surfacing material. This includes, but is not limited to, the removal of asbestos-containing wallboard, floor tile and. sheeting, roofing and siding shingles, and construction mastics. Class III asbestos work means repair and maintenance operations, where ACM, including TSI and surfacing. ACM and PACM, is likely to be disturbed. Class IV asbestos work means maintenance and custodial activities during which employees contact but do not. disturb ACM or PACM and activities to clean up dust, waste and debris resulting from Class I, II, and III activities.