Which of the following could indicate a problem with a UST?

Visible corrosion or leaks around the tank is a significant indicator of a problem with a UST (Underground Storage Tank). This physical evidence often suggests that the structural integrity of the tank may have been compromised, which can lead to fuel leaks. Such leaks pose environmental risks, as they can contaminate the surrounding soil and groundwater.

Detecting corrosion or moisture around the tank can be crucial for maintenance and compliance with regulations, ensuring that any issues are addressed promptly to prevent further deterioration and potential hazards. Regular inspections are essential for identifying these indicators early and maintaining the safe operation of UST systems.

Increased fuel sales and frequent tank refilling, while potentially demonstrating higher demand or usage, do not necessarily indicate a problem with the tank itself. Lower than average temperature readings can impact performance or efficiency, but they are not direct indicators of issues with the integrity of the storage system.