How often should USTs that contain gasoline undergo corrosion inspections?

USTs (Underground Storage Tanks) that contain gasoline should undergo corrosion inspections annually to ensure their integrity and safety. This yearly inspection is crucial because gasoline can be corrosive to tank materials, particularly when it comes into contact with water and other contaminants. Regular inspections help identify any signs of corrosion or leaks early, allowing for timely maintenance and repairs to prevent environmental hazards, product loss, and potential safety issues.

In the context of other options, inspecting every month would be excessive and not typically required by regulations, creating an unnecessary burden and cost without significant benefit. Inspections every two years represent a longer interval than recommended, which might increase the risk of undetected corrosion-related problems. Five-year inspections would be quite inadequate, considering the potential rapid pace at which corrosion can develop in certain conditions, especially in tanks that hold volatile substances like gasoline. This emphasizes the importance of adhering to annual inspections for maintaining UST safety and compliance with environmental regulations.