Removal of Asbestos - A-23 Scope of Work
This domain tests your command of the A-23 asbestos abatement classification: what work it authorizes, how abatement is sequenced, and where the scope stops. Questions often turn on scope creep-work that looks like abatement but legally requires another license.
Core scope
A-23 authorizes abatement of asbestos-containing material (ACM) in structures: removal, encapsulation, enclosure, and related cleanup. A compliant A-23 job typically includes:
- containment construction and critical barriers;
- negative air machines with HEPA filtration and decontamination units;
- wet methods, shadow vacuuming, and HEPA vacuuming;
- bagging and wrapping waste, labeling, transport, and disposal at an approved landfill;
- worker protection, air-monitoring coordination, and project documentation.
A-23 does not authorize general building or engineering work. If the contract includes rebuilding, demolition beyond abatement, HVAC, electrical, or finish trades, those portions need the appropriate B or C classification, or a properly licensed subcontractor. Clearance air sampling is normally performed by an independent third party, not the abatement contractor.
Worked example
An A-23 contractor is asked to remove 1,200 sq ft of asbestos floor tile and mastic in a school and then install new ceiling grid and paint. The tile and mastic removal is within A-23. The grid and painting are not; the contractor must either hold the right classification or subcontract to licensed firms. Signing one contract for all the work without those licenses creates unlicensed-contracting exposure.
Traps
- Treating “incidental” rebuild work as covered by A-23.
- Assuming A-23 permits full demolition.
- Confusing abatement with clearance: the contractor removes; the third party clears.
- Forgetting waste manifests and landfill approval records.