Upon arriving on the scene of a leaking 55 gallon drum with a flammable liquid placard, the relevant Emergency Guidebook section you might refer to is:

• A. Blue guide
• B. Green guide
• C. Orange guide
• D. Red guide

Answer: (C)

The correct response is based on the fact that the Orange guide in the Emergency Response Guidebook (ERG) specifically addresses hazardous materials that pose immediate safety risks, including flammable liquids. The guide offers detailed information regarding the nature of the hazards, recommended protective measures, evacuation distances, and proper response actions for emergencies involving flammable substances.

When dealing with a leaking drum of flammable liquid, first responders need to ascertain the appropriate safety measures and procedures to mitigate the risks associated with fire or explosion. The information within the Orange guide assists responders in identifying the immediate steps to take, including hazard containment, personal protective equipment requirements, and firefighting techniques tailored to flammable liquids.

While there are other guides like the Blue, Green, and Red guides addressing different categories of emergencies—such as specific chemical hazards, environmental concerns, and radiological incidents—the Orange guide is directly relevant for this scenario, making it the most useful reference for handling a flammable liquid leak.