Which type of fuel tanks is strictly prohibited in certain environmentally sensitive areas?

Underground storage tanks are subject to stringent regulations, especially in environmentally sensitive areas. These regulations are in place due to the potential risk of soil and groundwater contamination that can arise if a tank leaks. Unlike above ground storage tanks, which are easier to monitor visually for leaks or damage, underground tanks are buried and harder to check, leading to a greater risk of unnoticed spills.

In sensitive environments such as wetlands, near bodies of water, or locations with specific hydrological vulnerabilities, the use of underground tanks poses a significant environmental threat. Therefore, many regulations and local laws outright prohibit their installation or use in these areas to protect ecosystems and public health. This strict regulation helps to minimize the chances of hazardous materials entering the environment.

The other options, while they may have their own regulations, do not carry the same level of risk and regulatory scrutiny in terms of environmental protection as underground storage tanks do in sensitive areas.