How frequently should UST systems be tested for tightness?

UST systems should be tested for tightness at least once every three years to ensure they are operating properly and to prevent leaks that could harm the environment and public health. Regular testing is critical because it helps identify potential issues before they escalate into significant problems. The three-year testing interval is established as a standard because it balances the need for frequent oversight with practical considerations for facility management.

This proactive approach in monitoring USTs helps maintain their integrity over time and ensures compliance with regulatory requirements. Waiting longer than three years or only testing when a leak is suspected increases the risk of undetected leaks, which can have severe environmental consequences. Regular testing assures that any deterioration or malfunction can be remedied in a timely manner.