What is the term for isolating hazardous substances to a defined area?

The correct term for isolating hazardous substances to a defined area is "Confinement." Confinement involves preventing the spread of hazardous materials beyond a designated containment area to minimize exposure and risk to personnel and the environment. This approach is critical during HAZMAT incidents, as it helps to control the situation and enables responders to effectively manage the hazardous substance without further complications.

Other terms such as contamination isolation and segregation may relate to handling hazardous materials but do not specifically refer to the action of isolating substances to a defined area. Contamination isolation typically describes the process of preventing the spread of contaminants to uncontaminated areas, while segregation refers to the physical separation of incompatible substances to prevent reactions or contamination. Neither directly defines the act of isolating hazardous substances in a specific confined space as accurately as confinement.