• If operation of the release detection method indicates a possible release, owners and operators need to report the potential release to the appropriate regulatory authority.

If operation of the release detection method indicates a possible release, underground storage tank (UST) owners and operators need to report the potential release to the appropriate regulatory authority. UST owners and operators must also keep records on release detection performance and upkeep. These include:

• The previous year’s monitoring results,
• The most recent tightness test results,
• Performance claims by the release detection device’s manufacturer, and
• Records of recent maintenance and repair.

Owners and operators must also keep the following records:

• Operation and maintenance walkthrough inspections that are required for periods of at least every 30 days and annually for one year;
• Release detection equipment that is tested annually to ensure proper operation for three years; and
• If the owners and operators store regulated substances containing greater than 10 percent ethanol or greater than 20 percent biodiesel, or any other regulated substance identified by the implementing agency, they must keep records demonstrating compatibility of the release detection components in contact with the regulated substances for as long as the UST system stores the regulated substance.