What requirement must be met for a leak to be classified as Grade 2?

The classification of a leak as Grade 2 is determined by the need for monitoring and repair at the next maintenance opportunity. This means that while the leakage is not immediately dangerous, it is still significant enough to warrant attention during scheduled maintenance.

Grade 2 leaks typically require a documented plan addressing the leak and prioritizing it for repair in due course. This approach allows personnel to manage the leak effectively without necessitating immediate evacuation or urgent intervention, as would be the case with a more serious leak requiring immediate action. By allowing time for repair during the next maintenance opportunity, it balances safety with practicality in routine operations.

Contrary to the other options, Grade 2 leaks are not classified as requiring immediate evacuation or corrective action during the next inspection alone. They imply an ongoing management approach rather than an immediate response, making it essential to monitor and plan for a timely repair while operating under safe conditions.