California ICC UST Inspector Practice Exam

When is a temporary closure of a UST system appropriate?

1. The UST system is empty and will be removed from service indefinitely

2. The UST system has ceased to store hazardous materials but will be used within the next 12 consecutive months

3. The UST system is unable to meet compliance requirements and will be removed

4. The UST system has been red-tagged

The correct answer is: The UST system has ceased to store hazardous materials but will be used within the next 12 consecutive months

The appropriate time for a temporary closure of a UST (Underground Storage Tank) system is when the system has ceased to store hazardous materials but is expected to be used again within the next 12 consecutive months. This allows for the UST to be closed in a manner that meets regulatory requirements while maintaining the option for future use, assuming that the environmental risks are managed appropriately during the closure period. In this situation, the UST system would undergo necessary preparations for temporary closure, such as proper removal of remaining products, cleaning, and ensuring that the system does not pose a risk to public health or the environment. This strategy aligns with regulatory practices that prioritize safety and flexibility for tank owners who plan to reactivate the system in the near future. Other scenarios presented do not align with temporary closures. For instance, when the UST system is empty and will be removed from service indefinitely, a permanent closure protocol is more appropriate. If the system is unable to meet compliance requirements and will be removed, this also suggests a more permanent action instead of a temporary one. Lastly, if a system has been red-tagged, it implies a significant issue that would likely necessitate immediate corrective action rather than a temporary closure.