U1 UST Installation/Retrofitting Practice Exam

The correct choice emphasizes the importance of a comprehensive inspection of both the interior and exterior surfaces of a tank that is shipped with a liquid-filled interstice. Inspecting both surfaces is crucial because potential leaks can occur in various locations and may not always be immediately visible from one side alone.

By examining the interior, you can identify any liquid intrusion that may suggest a breach or malfunction in the tank itself, while assessing the exterior allows for the detection of any external leaks or corrosion that could compromise the structural integrity of the tank. This thorough approach ensures that no signs of leakage are overlooked, which is vital for maintaining safety and compliance with environmental regulations.

Inspections that focus solely on the top and bottom, inside and outside, or front and back could miss critical signs of leakage that might appear in less commonly viewed areas. The detailed assessment of both the interior and exterior provides a more effective evaluation of the tank’s overall condition.