California ICC UST Inspector Practice Exam

Which statement about temporary UST closure is incorrect?

1. Temporary closure applies to tanks used within 12 months

2. Local agencies have no authority to extend closure periods

3. USTs must be closed if no inputs or withdrawals occur

4. Inerting may be required for tanks with flammable substances

The correct answer is: Local agencies have no authority to extend closure periods

The statement regarding local agencies having no authority to extend closure periods is incorrect because, in practice, local agencies often have the discretion to assess specific conditions and allow for extensions to closure periods based on operational needs or environmental considerations. Various federal and state regulations might provide guidelines, but local agencies are usually empowered to make decisions that reflect local circumstances. In contrast, temporary closure rules typically allow for tanks that are out of use to be closed for a period while still categorizing those that are still within active use, along with applicable requirements for maintaining safety, such as inerting tanks containing flammable substances. Each of the other provided statements accurately reflects the established regulations and practices regarding temporary UST closure.