California ICC UST Inspector Practice Exam

What corrosion protection option is not available for a tank installed prior to December 22, 1988?

1. Cathodically protected noncoated steel tanks or piping

2. Combination of cathodically protected steel and internal lining of tanks

3. Made of noncorrodible material

4. Latex-coated

The correct answer is: Latex-coated

Latex-coated tanks are not recognized as a viable corrosion protection option for tanks installed prior to December 22, 1988, because such coatings may not provide the necessary long-term corrosion resistance required by updated standards for UST systems. The regulations that were in place at that time mandated specific methods of corrosion protection that have proven more effective, such as cathodic protection or using materials that resist corrosion inherently. Tanks installed before this date relied on certain protection methods, which include cathodically protected materials, combinations of internal linings and cathodic protection, or construction from materials not susceptible to corrosion. Therefore, other options listed remain compliant with regulatory requirements and best practices established for the installation timeframe, while latex coating lacks the robustness needed to be a comprehensive solution for UST corrosion protection against the environmental factors these tanks face over time.