Supervision, Worker Safety, and Emergency Response
What this domain tests
Supervision questions test authority, site control, emergency response, and documentation. Expect scenarios where the supervisor must stop work, isolate a hazard, or correct a breach.
Core rules and concepts
- The supervisor or competent person ensures the containment, decontamination, PPE, exposure monitoring, and work practices match the plan. The competent person has authority to stop work when conditions are unsafe or noncompliant.
- Site control includes limiting access to trained authorized workers, posting warning signs, securing the perimeter, and maintaining the decon unit. Visitors need the same protection and training as workers if they enter the regulated area.
- Emergency planning covers fire, loss of power or negative pressure, containment failure, worker injury, and spills. The plan should identify alarms, evacuation routes, shutdown steps, first aid, and notification contacts.
- In a containment breach, stop work, keep workers in the dirty area until decon is arranged, repair the breach, HEPA vacuum and clean, verify negative pressure, and document. Do not resume until the supervisor confirms controls are restored.
- Record incidents, corrective actions, exposure monitoring, and any changes to the plan. Emergency response does not suspend worker protection or waste-handling rules.
Worked example
A negative air machine fails and the enclosure pressure rises to zero. The supervisor stops removal, has workers remain in the work area, and checks for open barriers. Once power is restored, the supervisor verifies negative pressure and HEPA-vacuums the area. If the failure allowed dust to escape, the supervisor must clean the adjacent space, consider air monitoring, and notify the owner. Restarting immediately without verification is the wrong choice.
Traps that cost marks
Do not let an untrained owner or visitor enter "just to look." Do not treat a power failure as an excuse to remove PPE. Do not skip documentation because the problem was fixed. Do not restart removal before negative pressure is verified.