What should customers be advised to do while filling propane containers?

Customers should be advised to stay away from the immediate filling area while filling propane containers for safety reasons. This practice minimizes the risk of personal injury in case of an accidental release or leak of propane. Propane is a flammable gas, and there could be hazards associated with its transfer, such as static electricity or equipment malfunctions.

By keeping a safe distance, customers reduce their exposure to potential dangers and allow the operator to focus on the task of safely dispensing the gas. It's important for customers to be aware that propane can accumulate in low-lying areas, which can lead to fire or explosion hazards if ignited. Thus, maintaining a safe distance ensures a safer environment for everyone involved in the process.

In contrast, while staying engaged with the operator, remaining within marked areas, or staying near the equipment may have certain situational benefits, they do not prioritize safety as effectively as distancing oneself from the immediate filling area does.