☣️ DOT HAZMAT CLASS 7
Radioactive Materials
Control time, distance, and shielding—limit exposure and follow specialized procedures.
🧯☣️
⚠️ Training/quick-reference only. For real incidents, follow your SOP/SOG and the current ERG.
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Common hazards (high level)
- Radiation exposure risk
- Contamination potential (if breached)
- Public concern and complex coordination
How to recognize
- Radiation trefoil labels/placards
- Transport containers with specialized markings
- Radiation monitoring alarms (if present)
First actions (before Hazmat team)
- Increase distance and limit time near source
- Isolate area and control access
- Request Hazmat + specialized agencies per SOP
- Do not handle packages unless directed
- Use monitoring and shielding principles
What NOT to do
- Do not open containers or disturb shielding
- Do not transport suspected sources casually
- Do not allow unnecessary convergence
Common examples
Medical isotopes (transport)Industrial sourcesRadiography equipment
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FAQ
Time, distance, and shielding—minimize time, maximize distance, and use shielding when directed.
Not always—sealed sources may not contaminate unless damaged; treat as unknown until confirmed.
Isolate, control access, and request appropriate resources; then follow SOP/SOG.
Sources (high level): DOT/PHMSA class & marking concepts, NFPA 704 overview concepts, and ERG usage principles. This guide does not reproduce ERG guide text—always consult the current ERG for incident-specific protective actions.