Which material is commonly used to line the interior of USTs?

Fiberglass-reinforced plastic (FRP) is commonly used to line the interior of underground storage tanks (USTs) due to its excellent resistance to corrosion and chemical damage. This material is lightweight yet strong, providing important structural integrity while also being resistant to the harmful effects of the fuels and chemicals typically stored in USTs. Additionally, FRP can help prevent leaks, which is crucial for environmental protection and compliance with regulations.

The choice of FRP also addresses the challenges associated with various chemical interactions that can cause degradation in other materials, making it a highly effective lining solution for USTs. This durability and efficacy contribute to the reliability and longevity of underground storage facilities, ensuring they operate safely and efficiently over time.