What does "unusually high groundwater" suggest about UST operations?

When groundwater levels are unusually high, it can lead to increased hydrostatic pressure against underground storage tanks (USTs). This pressure may expose weaknesses in the tank structure or its protective systems, potentially leading to leaks. The integrity of the UST can be compromised by the added pressure from the surrounding water, which can push on the tank walls and create conditions favorable for leaks to occur if there are any existing faults or weaknesses.

Recognizing the implications of high groundwater levels is essential for operators, as it underscores the need for enhanced monitoring and risk assessment during UST operations. Ensuring that tanks are in good condition and that all necessary preventive measures are in effect is critical to mitigate the risk posed by hydrostatic pressure in such scenarios.