What defines a “compatible” material in relation to UST construction?

In the context of Underground Storage Tanks (UST), a "compatible" material refers to those that are non-reactive and suitable for storing the type of liquid substance contained within the tank. This means that the material must withstand the chemical and physical properties of the stored product without degrading, leaching, or reacting negatively over time. For example, if a tank is storing gasoline, the construction material must not react chemically with gasoline, which could lead to leaks, contamination, or structural failures.

Materials that are deemed compatible ensure the integrity and safety of UST systems, preventing potential environmental hazards and ensuring compliance with regulatory standards. The compatibility of materials is crucial in ensuring that they can safely contain various substances without suffering from corrosion, deterioration, or any failure that could lead to a spill or release.

Other factors like cost, availability, or weight may play roles in the selection of materials for UST construction, but they do not define compatibility in the specific context of how the materials interact with the stored liquids. The primary emphasis is always on non-reactivity and suitability for the intended use, highlighting why the definition of compatible materials centers around their chemical stability and appropriateness.