What must operators do if their UST system is upgraded?

Operators must notify the appropriate regulatory agency of the changes made to their UST (Underground Storage Tank) system after an upgrade because this is a critical step to ensure compliance with state and federal regulations. Upgrading a UST system often involves modifications that could affect the safety, environmental impact, and overall integrity of the tank and its associated systems.

Notifying the regulatory agency allows for monitoring and verification that the upgrades meet safety standards and regulatory compliance. This notification process ensures that any necessary inspections or reviews can be conducted by the authorities, providing an additional layer of oversight to prevent leaks or other hazardous situations that might arise from the upgraded system.

The other options, while potentially relevant in different contexts, do not capture the essential requirement of regulatory compliance after a UST system upgrade. For example, conducting a risk assessment may be advisable but is not the primary requirement. Requesting an inspection from local authorities or issuing a public notice may not be mandatory and can depend on local regulations. However, notifying the appropriate regulatory agency is a fundamental requirement that ties directly to compliance with established laws governing UST systems.