Which statement about loading and unloading cargo tanks is false?

The statement that a person in attendance must be within 50 ft. of the tanker is inaccurate. In fact, regulations typically require that the person overseeing the unloading process or operation of hazardous materials must remain within a certain distance, which can vary by jurisdiction. This is to ensure that someone is available to respond to any emergency situations that arise during loading or unloading. The specific distance in many guidelines is actually closer than 50 ft., reinforcing the importance of having immediate access to the tanker.

In contrast, the other statements address critical safety protocols. Marking the unloading area helps ensure that it is clearly designated for such purposes and minimizes the risk of accidents. Additionally, having the driver outside of the vehicle during unloading is a safety measure to ensure they're not put at risk while monitoring the process. Finally, ensuring the area is free from spark hazards is crucial to preventing ignition of any flammable materials. These practices collectively contribute to a safer loading and unloading environment for hazardous materials.