If an "X" or "RQ" is in the "HM" column of a shipping paper entry, what does it indicate?

The presence of an "X" or "RQ" in the "HM" column of a shipping paper entry clearly indicates that the shipment is regulated by hazardous material regulations. This designation is crucial in identifying those materials that pose a potential risk to health, safety, or the environment during transportation.

When shipping papers include this notation, it signals to handlers, carriers, and emergency responders that special precautions, labeling, and reporting measures are necessary to ensure safe transportation and compliance with federal regulations. The designation reinforces the idea that the materials classified as hazardous require adherence to specific laws designed to mitigate risks associated with their transportation.

Understanding this aspect of hazardous materials transportation helps ensure that all parties involved in the handling and transport of these materials are aware of their legal responsibilities.