One resource that deals with protective action distances involving toxic gas is the?

One resource that deals with protective action distances involving toxic gas is the?

• A. Oxidizers
• B. Emergency Response Guidebook
• C. NFPA 704 Handbook
• D. Chemical Hazard Reference

Answer: (A)

Protective action distances for a toxic gas come from guidance that translates a chemical’s properties into safe distances for people during an incident. The Emergency Response Guidebook is the standard field reference that provides these protective action distances for thousands of chemicals, including toxic gases, and links them to specific guide numbers to help responders decide how far to evacuate, isolate, or shelter in place. Oxidizers describe a hazard type, but they aren’t a resource that gives protective action distances. The NFPA 704 Handbook offers hazard ratings to quickly convey risk in labeling, not the action distances for gas releases. A Chemical Hazard Reference might summarize hazards, but it isn’t the primary, systematic source used to determine PADs for toxic gas incidents.

Protective action distances for a toxic gas come from guidance that translates a chemical’s properties into safe distances for people during an incident. The Emergency Response Guidebook is the standard field reference that provides these protective action distances for thousands of chemicals, including toxic gases, and links them to specific guide numbers to help responders decide how far to evacuate, isolate, or shelter in place.

Oxidizers describe a hazard type, but they aren’t a resource that gives protective action distances. The NFPA 704 Handbook offers hazard ratings to quickly convey risk in labeling, not the action distances for gas releases. A Chemical Hazard Reference might summarize hazards, but it isn’t the primary, systematic source used to determine PADs for toxic gas incidents.