How often should UST tank lining be inspected?

• A. Within 10 years of application and every 5 years thereafter
• B. Every 2 years
• C. Every 6 months
• D. Every 15 years

Answer: (A)

This tests how often a UST tank lining should be inspected to keep corrosion protection effective. Linings are meant to prevent the tank from corroding in the soil environment, but they degrade over time due to moisture, chemicals, temperature changes, and general aging. Because early degradation can be subtle, an inspection within 10 years of the lining’s application establishes a checkpoint while the coating is still likely to be doing its job. After that, inspecting every 5 years provides a practical schedule to detect delamination, cracking, blistering, or thinning before leaks develop. More frequent intervals like every 2 years or every 6 months are usually unnecessarily costly unless specific problems or highly aggressive soils are present, while waiting 15 years risks missing significant coating deterioration.