Underground tanks are storage containers buried beneath the ground's surface. They are commonly used for storing liquids, such as fuel, water, or chemicals. These tanks are designed to prevent leaks and protect the environment from contamination. Typically made of materials like steel or fiberglass, underground tanks are installed in various locations, including gas stations and industrial sites. Regular inspections and maintenance are essential to ensure their integrity and safety, as leaks can pose significant environmental risks and regulatory concerns.