Disaster Site Hazards and Hazard Recognition
Disaster sites are not construction sites with more debris. The exam tests whether you can recognize hazards that shift with weather, demolition, and each new task, and whether you can prioritize them before entry.
Core recognition rules
- Treat the site as dynamic: reassess at the start of each shift, after weather changes, and whenever debris is disturbed.
- Look for structural instability, falling debris, sharp metal and glass, open shafts, and unbraced walls.
- Identify utilities and secondary response hazards: downed power lines, gas leaks, generators producing carbon monoxide, fuel storage, and heavy equipment traffic.
- Assume contaminated dust and debris may contain asbestos, lead, silica, mold, and human or animal remains.
- Recognize confined spaces, heat and cold stress, noise, fatigue, and traumatic stress as hazards, not background.
Worked example
A worker is told to clear debris beside a cracked wall. The area has visible dust, standing water, and a downed line. The correct reasoning is: stop before entry; treat the wall as unstable; treat the line as energized; barricade the area; notify the supervisor and site safety officer; request utility isolation and air monitoring; then select PPE and controls based on the findings. The error is to focus only on dust and mask and start work.
Traps that cost marks
- Assuming a site is static or that yesterday's monitoring covers today's task.
- Smelling a chemical and missing carbon monoxide or oxygen deficiency.
- Entering a confined space or excavation without evaluation.
- Treating PPE as a substitute for isolation and engineering controls.