What construction site condition must be met according to the approved fire safety plan?

The condition that must be met according to the approved fire safety plan is that the building must be actively monitored. This requirement is critical because constant monitoring ensures that any potential hazards or emergencies can be quickly identified and addressed. Watchpersons play a vital role in this process by overseeing construction activities, conducting safety inspections, and being the first responders to any incidents that may arise on the site. Active monitoring not only enhances the overall safety of the construction site but also mitigates the risks associated with fire and other emergencies, ensuring compliance with safety regulations and standards.

In the context of the other choices, they may relate to specific site practices or operational preferences but do not align with the core requirement of establishing a safe and quickly responsive environment as dictated by the fire safety plan. Other conditions may vary based on specific scenarios but the emphasis on active monitoring stands out as a fundamental requirement in maintaining safety at construction sites.