What is the term for a controlled release of a hazardous material to eliminate a threat?

The term "planned release or venting" accurately describes a controlled release of a hazardous material aimed at mitigating a potential threat. This procedure is often employed during hazardous material incidents where it is determined that allowing the substance to vent safely can reduce the pressure or hazard presented by the material, thereby preventing a more dangerous situation, such as an uncontrolled explosion or toxic exposure.

Such a planned operation is typically executed with precision and under strict safety protocols, ensuring that the release poses minimal risk to personnel, the public, and the environment. It requires thorough preparation, assessment of potential impacts, and consideration of weather conditions to safeguard against collateral damage.

In contrast, other options do not have the same specific connotation or applicability within hazardous material management practices. For instance, "controlled discharge" could refer to various contexts where a substance is intentionally released, but it lacks the precise focus on hazard mitigation found in "planned release or venting." Similarly, "emergency ejection" and "safe outflow" are not standard terms within emergency response protocols for hazardous materials, as they lack specificity and clarity regarding the process of venting as a safety measure.