What is a key factor in determining whether a UST must be upgraded?

A key factor in determining whether a UST (Underground Storage Tank) must be upgraded is changes in regulations or technology advancements that improve safety. Regulatory bodies often update standards to enhance environmental protection and safety measures. When new regulations are enacted, they may require existing tanks to meet higher safety and performance standards that weren't in place when the tanks were originally installed.

Moreover, advancements in technology can lead to better materials or methods for monitoring and preventing leaks or other hazards associated with fuel storage. For instance, the introduction of better leak detection systems or more corrosion-resistant tank materials might signal the need for upgrades to ensure compliance with current safety protocols.

While the age of the tank can indicate when an upgrade might be necessary, it is not the sole determinant. Similarly, the type of fuel stored and the location of the tank can influence risks but do not intrinsically mandate an upgrade. Upgrades are fundamentally driven by the necessity to align with improved safety regulations and technological advancements.