After identifying a material's 3-digit guide in the Emergency Response Guidebook, what should the first responder do next?

• A. Go to the blue section
• B. Go to the red section
• C. Go to the green section
• D. Go to the orange section

Answer: (D)

After identifying a material's 3-digit guide number in the Emergency Response Guidebook, the first responder should go to the orange section. This section contains crucial information about the chemical, including its hazards, recommended protective actions, and emergency response measures. The orange section is structured to help responders quickly assess the necessary actions based on the hazardous materials involved.

The guide number directs responders to specific information that will aid in the management of incidents involving hazardous materials, thereby ensuring the safety of both first responders and the public. The focus on immediate, actionable information in the orange section is what makes it the correct reference point following the identification of the guide number.