In an IMS HazMat group, which three functional positions make up the HazMat group?

• A. Entry leader, decontamination leader, and site access control leader
• B. Entry leader, decontamination officer, and site access control leader
• C. Entry leader, decontamination leader, and site access control supervisor
• D. Entry supervisor, decontamination leader, and site access control leader

Answer: (A)

In an IMS HazMat response, the HazMat Group is structured around three functional leadership roles that cover the critical flow at the scene: entering the hot zone, performing decontamination, and controlling who can access the site. The three leaders are responsible for coordinating their part of the mission to keep operations safe and accountable.

Entry leader handles all entry into the contaminated area, including planning entry priorities, ensuring proper PPE and precautions, and coordinating with other teams to time and sequence entries.

Decontamination leader supervises the decon process for personnel and equipment, manages the decon corridor, ensures procedures are followed, and maintains the integrity of the decontamination sequence and records.

Site access control leader manages who can come and go from the site, maintains the access log, ensures only authorized personnel enter, and coordinates with incident command to preserve scene integrity and accountability.

These three roles together create a clear, manageable structure for HazMat operations. Other title variations—like using a supervisor or officer—don't align with the standard HazMat Group leadership model and could blur lines of responsibility.