Which of the following is not a class of employees designated to work in confined spaces?

In the context of confined spaces, specific roles are defined to ensure safety during operations. The roles of authorized attendant, authorized entrant, and entry supervisor are all part of the defined classifications mandated by regulatory standards, particularly those established by OSHA.

An authorized entrant is someone who is trained and allowed to enter the confined space. This individual is responsible for recognizing potential hazards within the space. The authorized attendant remains outside the space to monitor the entrant(s), providing communication and assistance in case of an emergency. Lastly, the entry supervisor oversees the entire process, ensuring that safety protocols are followed and that operations are conducted in compliance with established guidelines.

The term "hazard technician," however, does not represent a recognized class of employees specifically designated for tasks relating to confined spaces. While this position might involve dealing with hazardous materials or situations, it does not fit within the structured hierarchy and roles associated with confined space entry. The absence of a formal classification makes this term unrelated to the other specified roles, solidifying its status as the correct choice for this question.