What is critical to do after identifying a leak in the system?

After identifying a leak in the system, it is crucial to lock the system to prevent any further operation that could exacerbate the situation. This ensures safety for personnel and prevents potential environmental hazards or equipment damage that could occur if the system continues to operate with a leak. Locking out the system effectively isolates it, allowing for a controlled environment in which repairs can be conducted safely without risking injuries or complications.

While alerting management, repairing immediately, and documenting findings are important steps in responding to a leak, they should occur after the system is secured. The primary focus at the moment of discovering a leak must be to ensure that no further issues arise during the repair process. This thorough approach allows for an organized response while prioritizing safety above all else.