California UST System Operator Practice Test

What action must owners and operators take if their UST fails the internal lining inspection and cannot be repaired?

1. Permanently close the UST

2. Install a new internal lining

3. Perform routine maintenance

4. Upgrade monitoring systems

The correct answer is: Permanently close the UST

When a UST (Underground Storage Tank) fails the internal lining inspection and is deemed irreparable, the appropriate course of action is to permanently close the UST. This decision is primarily driven by environmental safety concerns and regulatory compliance. When a UST is unable to maintain its integrity, it poses a risk of leaks that can contaminate soil and groundwater. Permanently closing the tank eliminates this risk and ensures that the environment is protected from potential pollutants. In addition, regulatory frameworks often require such measures as part of their mandate to prevent environmental contamination from failed storage systems. Thus, if repair is not feasible, closure becomes a necessary step in maintaining compliance with environmental standards. Other options, such as installing a new internal lining or performing routine maintenance, may not address the fundamental issues that led to the failure of the inspection. Upgrading monitoring systems also does not resolve the immediate concern of a compromised tank lining, which can lead to leaks and environmental hazards. Thus, the emphasis on permanently closing the UST is essential to adhere to safety regulations and protect public health.