How often must UST systems be tested for corrosion?

UST systems must be tested for corrosion every three years to ensure that the integrity of the tank and associated equipment is maintained. This testing is crucial because corrosion can lead to leaks and environmental contamination, which pose significant risks to public health and safety as well as compliance with regulatory requirements.

The three-year timeframe is stipulated by the regulations to provide a balance between ensuring ongoing safety and managing the costs of testing. Frequent testing, such as annual or monthly, may not be practical or necessary for assessing corrosion if a comprehensive inspection is performed every three years. Testing every five years might not be frequent enough given the potential for corrosion to develop, especially in certain environmental conditions or with specific materials that are more susceptible to deterioration.

Overall, a three-year testing interval provides a necessary routine to effectively monitor corrosion, uphold safety standards, and mitigate the risk of underground leaks.