What strategy involves sealing off a hazardous area to prevent further exposure?

The strategy that involves sealing off a hazardous area to prevent further exposure is known as isolation. This approach is critical in hazardous materials incidents because it minimizes the risk of individuals being exposed to harmful substances. By isolating the area, responders can protect the surrounding environment and the health and safety of first responders and the public. Isolation ensures that the hazardous material does not spread, which is essential for controlling an incident effectively.

In hazardous material response, controlling access to an area allows for better management of the situation, providing responders the ability to conduct their operations without the interference of unauthorized personnel. This also aids in the establishment of a safe perimeter, ensuring that emergency measures can be undertaken without additional risk from external factors.