One resource that deals with protective action distances involving poisonous gas, is the :

• A. NIOSH Pocket Guide to Chemical Hazards
• B. DOT ERG book
• C. EPA Protective Action Guide
• D. FEMA Hazards Handbook

Answer: (B)

Understanding protective action distances for a toxic gas release means knowing where to set the danger zones and what actions to take at the scene. The DOT Emergency Response Guidebook is the resource that provides material-specific initial isolation and protective action distances for hazardous releases, including poisonous gases. It gives responders quick, practical guidance on how far to evacuate or shelter in place based on the substance and scenario, helping to quickly establish safe zones and actions at the incident.

The other resources play important roles but in different ways. The NIOSH Pocket Guide focuses on chemical hazards like properties and exposure limits, not the on-scene distance calculations. The EPA Protective Action Guide offers general guidance for protective actions in various incident types but isn’t as specific to TIH distance calculations at a response scene. The FEMA Hazards Handbook provides broad hazard information and planning concepts rather than the nitty-gritty PADs used in real-time hazmat responses.