What should be done first if a HAZMAT responder discovers a leak?

When a HAZMAT responder discovers a leak, the first priority is to ensure the safety of everyone in the vicinity. Evacuating the area and establishing a safe perimeter is critical because it minimizes the risk of exposure to hazardous materials for both the responders and the public. This action helps to secure the scene and allows for further assessment of the situation without putting anyone in immediate danger.

Establishing a safe perimeter creates a controlled environment where responders can assess the leak, identify the hazardous materials involved, and formulate an appropriate response plan. This foundational step is crucial because, without it, any further actions taken—such as sealing the leak or treating affected individuals—could expose additional people to danger or hinder effective response efforts.

After ensuring evacuation and safety, responders can then move on to other necessary actions, such as calling for additional support teams and addressing the leak itself, but the priority must always be on protecting human life and maintaining safety first.