What type of incident requires an operating facility to be taken out of service?

The correct response identifies that an incident requiring facilities to shut down is critical. When a situation arises that leads to safety concerns, environmental risks, or potential regulatory violations, the immediate action is to ensure public safety and facility integrity. A shutdown prevents further hazards and allows for thorough investigation and remediation.

Shutting down operations is often essential during significant incidents, such as major leaks or accidents, to mitigate risks and protect personnel and the environment. This approach follows industry safety protocols and legal requirements, ensuring that all safety measures are prioritized before resuming operations.

The other scenarios, such as minor leaks or no injuries, usually don't necessitate a complete shutdown. They might be managed with appropriate procedures and safety measures without halting all facility activities. However, incidents that require emergency response still demand careful evaluation; while they may not inherently require a shutdown, they could lead to one depending on severity and immediate risk assessment.