Are all components of UST systems designed for all blends of ethanol in the fuel?

The statement is false because not all components of UST systems are universally designed to handle all blends of ethanol in fuel. Ethanol can be corrosive and can interact differently with materials used in older storage tank systems, potentially leading to material degradation or failure. Certain components, such as the tank itself, piping, gaskets, and seals, may not be compatible with higher ethanol concentrations commonly found in fuels like E85, which is composed of 85% ethanol.

While many newer systems are designed with materials that can withstand a range of ethanol blends, older systems may not have this capability. Therefore, operators must ensure that the materials and components of their specific UST systems are compatible with the fuel they are storing, particularly if it contains significant amounts of ethanol. Regular assessments and upgrades may be required for compliance and safety when dealing with various fuel blends.