What does personal supervision entail according to FDNY standards?

Personal supervision, according to FDNY standards, requires that a certified individual be physically present on-site. This ensures that any actions taken regarding the supervision of piped non-flammable medical gases are conducted with immediate oversight and can be addressed in real-time. Presence on-site is crucial in maintaining safety, compliance, and the integrity of operations involving medical gases, where any delays or miscommunications could lead to serious consequences.

In contrast, the other options suggest a level of supervision that does not meet the rigorous standards set forth by the FDNY. Relying on phone communication or supervision from a distance does not provide the immediate response capability needed in environments where medical gases are used, especially in emergency situations or during critical maintenance tasks. Similarly, limiting the certified individual's involvement to only inspection periods undermines the continuous oversight required for safe and effective management of these systems.