In the ERG, what color is used to indicate UN/NA ID numbers?

• A. White
• B. Yellow
• C. Red
• D. Blue

Answer: (B)

In the Emergency Response Guidebook (ERG), the color yellow is specifically used to indicate UN/NA (United Nations/North American) identification numbers. These numbers are critical for first responders as they help identify hazardous materials involved in an incident. By using a distinct color, the ERG makes it easier for responders to quickly locate and reference important information related to the specific materials they might encounter. This color-coding system enhances the overall efficiency of emergency response by streamlining access to vital data necessary for handling hazardous situations safely. The yellow section of the ERG provides a list of these ID numbers along with corresponding material names to assist responders in identifying the potential risks and necessary precautions.