For which type of incident is an actual release applicable?

An actual release is applicable specifically to a confirmed release of hazardous materials into the environment. This type of incident indicates that there has been a tangible and measurable incident where hazardous materials have escaped from their intended storage or containment area. In these situations, immediate action is required to mitigate hazards, protect public health, and reduce environmental impact.

In contrast, other choices refer to scenarios that do not involve an actual release. A potential release scenario refers to situations that may lead to a hazard but do not indicate that a release has occurred. Similarly, a planned evacuation of a facility does not necessarily correlate with an actual hazard present but may be a precautionary measure. Lastly, a routine safety check is a proactive measure taken to ensure there are no potential risks, and it also does not involve an actual release of hazardous materials.