Whenever you load or unload a cargo tank, where must a qualified person be?

When loading or unloading a cargo tank, having a qualified person within 25 feet is essential for safety and compliance with regulations. This proximity ensures that the individual can quickly respond to any emergencies that may occur during the loading or unloading process, such as spills, leaks, or unexpected reactions involving hazardous materials. The requirement is designed to mitigate risks associated with handling dangerous substances and to protect both the worker and the surrounding environment.

Being within this distance allows the qualified person to effectively monitor operations and intervene swiftly if necessary, which is critical when dealing with flammable or toxic materials. Proper safety protocols and regulations are in place to reduce the likelihood of accidents, and maintaining this distance is a key part of those protocols. The other ranges mentioned in the other choices either exceed the necessary proximity or do not align with safety practices.