What is a critical aspect of site safety during mobile water supply operations?

A critical aspect of site safety during mobile water supply operations is ensuring the exclusion of bystanders from the operational area. This is essential because the operational zones can be hazardous, with active equipment and potential for unexpected incidents. By keeping bystanders at a safe distance, the risk of injury is significantly reduced.

When non-operational personnel are present in the vicinity, they can become a distraction or be inadvertently harmed by equipment operation, water discharge, or vehicular movement. Therefore, implementing measures to control access to these areas is paramount in maintaining a safe working environment for both emergency responders and the public.

The other options mentioned may not contribute positively to site safety. For example, maximizing the number of vehicles present could lead to congestion and confusion, increasing the potential for accidents. Performing demonstrations for the public might create unnecessary risks and distractions during critical operations. Lastly, using high-pressure hoses, while efficient in delivering water, can pose additional hazards such as causing injury or damage if not handled properly. Therefore, the focus on excluding bystanders plays a crucial role in maintaining safety during these operations.