What chart from the Emergency Response Guidebook can be used when the ID number or proper shipping name is not available for a truck carrying hazardous materials?

The appropriate chart to use when the ID number or proper shipping name is not available for a truck carrying hazardous materials is the Road trailer ID chart. This chart is specifically designed for emergency response situations where first responders may encounter a variety of hazardous materials but lack complete shipping documentation. The Road trailer ID chart helps responders quickly identify the type of cargo being transported based on visual clues and markings found on the truck. This rapid identification is crucial for assessing potential hazards and planning an appropriate response, ensuring safety for both responders and the surrounding community.

Other options, while relevant in certain contexts, do not fulfill this particular need as effectively. The Rail car ID chart is specific to rail transport and would not apply to trucks. The Globally Harmonized System is a classification system for chemicals and their hazards, but it is not tailored for immediate identification in emergency scenarios. Lastly, the Safe stand-off distance chart provides guidance on safe distances to maintain from hazardous materials during an incident rather than aiding in identifying what those materials are. Thus, the Road trailer ID chart is the most suitable choice for the given situation.