What must be done with USTs that are no longer in use?

When underground storage tanks (USTs) are no longer in use, they must be properly closed and documented in accordance with state regulations. This process involves a series of steps to ensure that the tank is safely decommissioned, which may include emptying the contents, cleaning the tank, and filling it with an appropriate material to prevent collapse or groundwater contamination. Documentation of this closure process is essential for legal and environmental compliance.

Proper closure is critical not only for safety but also to uphold environmental protections that prevent soil and waterway contamination. Regulations also typically require that the closure be performed by qualified personnel and that specific notification procedures are followed to inform regulatory agencies of the closure. This ensures that there are records in place should future environmental assessments or inspections occur.

Leaving the tanks in place or abandoning them without action does not comply with these regulations and can pose significant environmental risks. Immediate removal may not always be necessary or the best course of action, especially if proper closure procedures can be followed.