Safety checklist — Asbestos / Decontamination
Asbestos removal and decontamination work. Based on Québec's Construction Safety Code (CSTC) and CNESST standards.
Before work
14 items- ✓
Asbestos types determined before work (CSTC 3.23.3)Critical
ℹ️ Construction site: CSTC 3.23.3. RSST 69.1 is a definitions article; establishment verification is 69.11.
- ✓
3.23.2 site category: low, moderate, or high riskCritical
ℹ️ CSTC 3.23.2 — not RSST Annex I (exposure values).
- ✓
Workers trained for asbestos work (ASP Construction training)
- ✓
PPE worn: disposable Tyvek coverall, P100 respirator or PAPRCritical
ℹ️ Minimum P100 for moderate risk — supplied air for high risk
- ✓
Containment zone installed with polyethylene if moderate/high risk
- ✓
HEPA-filtered air extractor under negative pressure in containment
- ✓
3-stage decontamination chamber installed (dirty → shower → clean)
- ✓
'DANGER — ASBESTOS' signage posted at all entrances
- ✓
Materials kept continuously wet to suppress airborne fibers
- ✓
No rotary power tools (saw, grinder) — use hand tools or low speedCritical
ℹ️ Sawing/grinding generates extremely high fiber concentrations
- ✓
Debris placed directly in sealed bags labeled 'ASBESTOS'
- ✓
Continuous HEPA vacuum — never dry sweep
- ✓
Regular verification of negative pressure in containment zone
- ✓
No food or drink in work zone
After work
5 items- ✓
Full worker decontamination at chamber before exiting
- ✓
Disposable coverall removed inside out and bagged
- ✓
Final air analysis performed — level < 0.01 fiber/cm³ to clear zoneCritical
ℹ️ Zone not clearable until air analysis confirms compliance
- ✓
Asbestos waste bags transported to authorized landfill
- ✓
End-of-work report completed and submitted (asbestos registry)
19 verification items — use this checklist on-site with the app
Use on-site — freePDF reports, history and team management in the app
For information only — this is not legal advice. OK Sécurité is an independent company with no affiliation to the CNESST: we are not mandated, endorsed or certified by it. Completing a checklist here does not by itself establish your compliance — your exact obligations depend on your job site and your prevention program. Where there is any discrepancy, the official text published by Légis Québec or the CNESST prevails.
More checklists — Cross-cutting Situations
More safety checklists
Related guides
Risks and prevention — Asbestos and decontamination
Asbestos is a leading cause of fatal occupational disease in Québec. On a construction site it is CSTC 3.23 (types 3.23.3; categories 3.23.2; training 3.23.7). RSST 69.1 is definitions — not the site text.
CSTC 3.23.2 sets low / moderate / high site categories. High-risk methods follow 3.23 — do not treat a sealed enclosure or supplied-air respirator as a free-standing sentence outside that subsection. Disposal follows the applicable waste rules.
CSTC 3.23.3: determine asbestos types before work that may emit dust. 3.23.3.2: remove materials that may emit asbestos dust before demolition. “Before 1999” is not a Code date.
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