Safety Trained Supervisor (STS) Practice Exam 2025 – Your All-in-One Guide to Exam Success!

The correct answer is that one authorized attendant must be on duty outside of a permit-required confined space. This requirement is established to ensure there is a designated person to monitor the activities of those entering the confined space, provide assistance in case of an emergency, and maintain communication with workers inside the confined space. The attendant plays a critical role in monitoring the atmosphere, ensuring that safety protocols are followed, and initiating rescue procedures if necessary.

While having additional attendants may provide further safety redundancy, the regulation focuses on the need for at least one person to fulfill these vital functions, making the role of the single authorized attendant crucial for overall safety compliance in confined spaces.