What kind of maintenance is required for UST systems?

The requirement for maintenance of Underground Storage Tank (UST) systems is comprehensive, and option B accurately reflects the necessary components of a proper maintenance routine. UST systems must undergo regular inspections to identify any signs of wear, corrosion, or leaks, which are crucial for ensuring that the tank operates safely and in compliance with regulations.

Leak detection tests are also an essential component, as these tests help in identifying any potential releases of hazardous substances into the environment. Preventive maintenance practices are vital to extend the life of the UST system and prevent costly failures or hazardous leaks. This maintenance approach is designed to ensure both the safety of the environment and the compliance with state and federal regulations, protecting public health and natural resources.

The other options do not encompass the full scope of maintenance required for UST systems. Occasional inspections alone would not be sufficient to address the potential risks associated with storage tanks. Annual full replacements of parts may be unnecessary and impractical if the system is adequately maintained. Additionally, while cleaning is an important aspect of maintenance, it typically does not need to occur on a quarterly basis and is not as comprehensive or critical as regular inspections and leak detection tests.