When assessing a UST site, what is a critical factor to consider regarding tank materials?

Choosing corrosion resistance as a critical factor when assessing a UST site is important because the materials from which the tank is constructed significantly influence its durability and safety. Corrosion can lead to leaks, which pose environmental hazards and health risks, particularly when dealing with hazardous materials stored in the tank.

Corrosion resistance ensures that the tank can withstand various chemical exposures and environmental conditions without degrading over time. Tanks made from materials with high corrosion resistance, such as fiberglass or certain alloys, are less likely to develop leaks that can contaminate soil and groundwater. This is crucial not only for regulatory compliance but also for the protection of public health and the environment.

Other factors, while relevant, do not outweigh the importance of corrosion resistance. The color of the tank does not affect its structural integrity or safety; it might be useful for visual inspections but does not contribute to its functional longevity. The thickness of the tank walls is important for structural stability, yet if the material is not corrosion-resistant, even thick walls can fail over time. The age of the tank provides context regarding its likelihood of failure, but without considering the material properties, it is difficult to assess the overall risk accurately. Thus, the focus on corrosion resistance is paramount in maintaining the integrity of UST systems.