Which statement about aboveground storage tanks is true?

The statement that aboveground storage tanks hold regulated substances is accurate because these tanks are specifically designed to store materials like fuel, oils, chemicals, or other liquids that could pose environmental or safety hazards. Regulations surrounding aboveground storage tanks are put in place primarily to prevent leaks and spills that could contaminate soil and water. This makes regular inspection and monitoring essential to ensure compliance with safety standards.

In contrast, the other statements do not apply to aboveground storage tanks. They are not completely buried, as their design is to be above the ground for easier inspection and maintenance. While some aboveground tanks can be made of various materials, including metal and fiberglass, plastic is not the predominant choice for durability and safety in many cases. Finally, while aboveground storage tanks do have specific regulations, they are subject to stringent rules as well, often making them comparable to, if not more strictly regulated than, underground storage tanks, particularly concerning the potential for spills and environmental impact.