If a numbered guide for a transported hazardous material cannot be obtained by following the 3 steps outlined on page 1 of the DOT ERG, the first responder should:

If a numbered guide for a transported hazardous material cannot be obtained by following the 3 steps outlined on page 1 of the DOT ERG, the first responder should:

• A. Call safety supervisor
• B. Check shipping papers
• C. Use UN/NA ID to locate guide
• D. See if the placard is visible, refer to the Table of Placards section of the Guidebook

Answer: (D)

When you can’t obtain the numbered guide through the initial steps, using the visible placard to locate the correct guide is the quickest way to get the right emergency information. The ERG is organized so the Table of Placards links each placard symbol to the corresponding guide. By identifying the hazard placard on the vehicle or container, you can open the specific guide that matches that hazard, even if you don’t have the UN/NA number handy or if the three-step lookup didn’t work. This approach gives you material-specific safety measures and response actions tailored to the exact hazard you’re dealing with. The other options are less direct for obtaining the proper instructions in the moment: relying on a supervisor doesn’t provide the immediate field guidance, checking shipping papers may help with identification but isn’t the quickest way to get the hazard-specific response, and trying to locate the guide by UN/NA ID again repeats steps that failed. Using the placard lookup through the Table of Placards is the most efficient path when the standard steps don’t yield a guide.

When you can’t obtain the numbered guide through the initial steps, using the visible placard to locate the correct guide is the quickest way to get the right emergency information. The ERG is organized so the Table of Placards links each placard symbol to the corresponding guide. By identifying the hazard placard on the vehicle or container, you can open the specific guide that matches that hazard, even if you don’t have the UN/NA number handy or if the three-step lookup didn’t work. This approach gives you material-specific safety measures and response actions tailored to the exact hazard you’re dealing with.

The other options are less direct for obtaining the proper instructions in the moment: relying on a supervisor doesn’t provide the immediate field guidance, checking shipping papers may help with identification but isn’t the quickest way to get the hazard-specific response, and trying to locate the guide by UN/NA ID again repeats steps that failed. Using the placard lookup through the Table of Placards is the most efficient path when the standard steps don’t yield a guide.