California UST System Operator Practice Test

When a UST (Underground Storage Tank) is temporarily closed and is empty, the owners and operators are not required to perform release detection. This is because, during temporary closure, as long as the tank remains empty and there is no product present, the risk of a release is significantly minimized. The purpose of release detection is to identify and respond to potential leaks in tanks that contain hazardous substances. If a tank is empty, the likelihood of a release from the tank itself is considerably reduced, making release detection unnecessary.

While there may be local regulations that impose additional requirements, typically, the federal and state regulations do not mandate release detection for empty tanks during temporary closure. This is a key aspect of management for USTs, as it balances the need for environmental protection with the practicalities of maintaining systems that are not currently in use. Therefore, knowing the regulations surrounding temporary closures is crucial for UST owners and operators to comply appropriately.