Safety checklist — Confined space
Entry and work in confined spaces. Compliant with Québec's Construction Safety Code (CSTC) and CNESST standards.
Before entry
13 items- ✓
PPE worn: rescue harness, respirator if required, hard hat, gas detector
- ✓
Confined space entry permit completed and signed
- ✓
Atmosphere tested: O₂ ≥ 19.5%, explosivity < 10% LEL, contaminants < OELCritical
ℹ️ Minimum RSST values: O₂ ≥ 19.5%, LEL < 10%
- ✓
Mechanical ventilation installed and functional
- ✓
Energy source lockout completed (RSST)
- ✓
Attendant posted at entrance — continuous communication with insideCritical
ℹ️ Attendant must never leave post or enter the space
- ✓
Rescue plan documented — rescue equipment at hand
- ✓
Workers qualified (≥ 18 years, RSST section XXVI trained)
- ✓
Portable gas detector running continuously
- ✓
Ventilation maintained throughout work
- ✓
Regular communication with attendant (every 5 min minimum)
- ✓
Immediate evacuation if gas detector alarmCritical
ℹ️ Immediate evacuation — never attempt solo rescue
- ✓
No ignition source if explosive atmosphere possible
After work / Exit
5 items- ✓
All personnel out — headcount confirmed
- ✓
Tools and materials removed from confined space
- ✓
Access sealed or barricaded to prevent unauthorized entry
- ✓
Entry permit closed and archived
- ✓
Lockout removed per procedure