All cooling systems containing more than 50 lbs. of refrigerant must be repaired when the annual leak rate exceeds what percentage?

For cooling systems containing more than 50 pounds of refrigerant, the requirement to repair leaks is triggered when the annual leak rate exceeds 15%. This standard is in place to ensure that refrigerant emissions are minimized, which is crucial due to the environmental impact of refrigerants and their contribution to ozone depletion and climate change.

The percentage is important because it provides a clear regulatory threshold that operators must monitor. By enforcing a repair requirement at a 15% leak rate, the EPA aims to encourage regular maintenance of cooling systems and proactive management of refrigerant use to reduce overall emissions.

In scenarios below this percentage, systems may remain operational without mandatory repairs, but once they exceed this threshold, operators are held accountable for taking corrective action. This helps to promote better practices in refrigerant handling and aligns with efforts to protect the environment. Overall, the 15% leak threshold reflects a balance between operational feasibility and environmental responsibility.