Which term describes the action of keeping hazardous materials on site during a release?

The action of keeping hazardous materials on site during a release is best described as confinement. This term refers to strategies implemented to limit the spread of hazardous substances, ensuring that they do not escape from the area of contamination. Confinement can involve using barriers or physical structures to contain the material within a specific area. The goal is to prevent hazardous materials from affecting surrounding environments or populations while the situation is being assessed or resolved.

Containment, although it sounds similar, specifically refers to the techniques employed to capture or hold hazardous materials, which might involve tools or systems to physically retain the substance. Isolation, on the other hand, involves creating a safe distance from the hazardous materials to protect responders and the public. Evacuation means removing people from an area that may be impacted by the hazardous materials, which is a different response altogether. Confinement focuses solely on controlling the hazardous materials on-site.