California UST System Operator Practice Test

Corrosion of tanks or pipes due to environmental exposure is a significant potential source of leaks from underground storage tanks. Over time, underground storage tanks, particularly those made of metal, can be subjected to various environmental factors such as moisture in the soil, chemical reactions with the stored fuel, and the presence of electrolytes. These conditions can lead to rust and degradation of the tank's structural integrity, resulting in holes or weak spots where leaks can occur.

Corrosion is often exacerbated by the presence of water or chemicals in the surrounding soil, which can accelerate the deterioration process. Regular inspections and monitoring for signs of corrosion are critical aspects of managing underground storage tanks to prevent potential leaks that could lead to environmental contamination and safety hazards. Understanding the mechanisms of corrosion helps operators implement proper maintenance practices to extend the life of their tanks and safeguard against leaks.