What is a common method for testing UST systems for integrity?

Pressure testing is a common method for testing underground storage tank (UST) systems for integrity because it allows operators to check for leaks in the tank and associated piping. This method involves sealing the UST and applying a certain level of pressure, then monitoring to see if there is a drop in pressure over time. A significant drop indicates a potential leak, which requires investigation and remediation to prevent environmental harm.

Additionally, pressure testing can be used to assess the structural integrity of the UST itself, ensuring that it has not corroded or been damaged in a way that would compromise its ability to safely store hazardous substances. By verifying that the tank can maintain the intended pressure without loss, it provides a reliable indication of the tank's condition and operability.

While visual inspections can provide some insight into the physical state of the tank, they may not detect leaks that are not visible on the surface. Temperature monitoring is not a standard method for integrity testing, as it does not provide direct evidence of leaks or structural failure. Leak detection encompasses various methods, including automated systems, but pressure testing is a more direct approach in evaluating the ability of UST systems to contain their contents safely.