What can trigger an investigation of a UST?

An investigation of a UST (Underground Storage Tank) can be triggered by suspected releases and significant changes in inventory because these factors indicate potential environmental hazards and regulatory compliance issues.

When there is a suspected release, it suggests that fuel or hazardous material could be leaking from the tank into the surrounding soil or groundwater, presenting a serious risk to public health and the environment. This could be due to physical damage to the tank, faulty fittings, or corrosion, among other factors.

Significant changes in inventory could also signal problems, particularly if the amounts of fuel delivered and dispensed do not match up. Such discrepancies may indicate that fuel is escaping from the system, either through leaks or other mechanisms, which necessitates further investigation to ensure that the UST system is functioning properly and is not posing a risk.

In contrast, routine fuel delivery schedules, regular maintenance inspections, and employee training sessions do not inherently signal issues that would necessitate immediate investigation. These activities are considered a normal part of UST operations intended to maintain safety and compliance rather than indicative of potential problems.