What action must be taken when an internally lined tank fails to meet original design specifications during inspection?

When an internally lined tank fails to meet the original design specifications during an inspection, the appropriate action is to repair or replace the lining. This is essential to ensure that the tank continues to provide adequate containment and protection against leaks that could potentially harm the environment or public health.

Internally lined tanks are designed to prevent corrosion and leakage from the tank structure. If the lining fails, it compromises the tank's integrity and ability to contain the stored substances safely. Repairing or replacing the lining allows the tank to continue functioning effectively while adhering to compliance regulations and safety standards.

Continuing to use the tank without addressing the lining failure poses significant risks, such as leaks and environmental contamination. Removing the lining entirely could also lead to accelerated deterioration of the tank material due to lack of protective measures. Switching to a different monitoring method would not resolve the underlying issue of the compromised lining and does not address the immediate need for repair or replacement to maintain safe operations.