What materials are commonly used for UST construction?

The selection of materials for underground storage tank (UST) construction is crucial for ensuring the safety, durability, and environmental integrity of the tanks. Steel and fiberglass-reinforced plastic are the two primary materials used in UST construction.

Steel is favored for its strength and ability to withstand external pressures, making it ideal for storing hazardous substances. However, it is susceptible to corrosion, especially when in contact with soil and moisture, which is why modern UST systems often incorporate protective coatings or corrosion-resistant alloys.

Fiberglass-reinforced plastic, on the other hand, is valued for its resistance to corrosion and its lightweight properties. It does not rust or corrode, which greatly enhances its longevity and reduces maintenance needs. Double-walled systems combine these materials to provide an additional layer of safety; the outer wall serves as a protective barrier that can help detect leaks and reduce the risk of contamination to the surrounding environment.

The other materials mentioned, such as cement, wood, and aluminum, do not meet the necessary standards for UST construction due to their limitations regarding durability, susceptibility to external environmental factors, and regulatory compliance. This comprehensive understanding of materials used in UST construction highlights why the selected choice is the most appropriate.