What must occur if personnel have a persistent Pulse Ox reading of 92% or lower after trying oxygen therapy?

When personnel exhibit a persistent Pulse Ox reading of 92% or lower, even after the administration of oxygen therapy, it indicates a concerning level of oxygen saturation that may require further medical evaluation. The appropriate action in this scenario is to undergo an Advanced Life Support (ALS) evaluation. This step is critical as it ensures that trained medical professionals can assess the individual's condition more comprehensively, identify any underlying issues, and determine the necessary interventions needed to ensure the person's safety and well-being. Implementing ALS evaluation protocols is essential in preventing potential complications associated with low oxygen levels and ensuring that personnel receive the appropriate care.

In contrast, other options do not address the critical need for immediate medical evaluation and could potentially leave personnel at risk. Resuming duty without proper evaluation may compromise safety, leaving them potentially unfit for task completion. Leaving the site does not ensure that the individual receives the necessary medical attention, and simply contacting a superior may delay the required medical response. Thus, the focus on undergoing an ALS evaluation aligns with the necessary procedures to manage health concerns effectively.