California ICC UST Inspector Practice Exam

Which type of tanks must be upgraded to double-wall systems, except for one category?

1. Tanks containing liquids with a pH > 13.

2. Waste oil tanks.

3. Solvent tanks.

4. Motor vehicle fuel tanks.

The correct answer is: Motor vehicle fuel tanks.

The requirement for upgrading tanks to double-wall systems is primarily focused on enhancing environmental protection and preventing leaks. Double-wall tanks are designed to contain any potential leaks from the inner tank, thereby minimizing the risk of soil and groundwater contamination. Motor vehicle fuel tanks are excluded from the requirement to upgrade to double-wall systems due to existing stringent regulations, advanced technology in leak detection, and established operational practices that effectively mitigate risks associated with fuel storage. These tanks are often installed with proper monitoring systems and meet high safety standards, which reduces the necessity for a double-wall structure. In contrast, the other categories of tanks, such as those containing liquids with a high pH, waste oil tanks, and solvent tanks, are typically associated with hazardous materials that pose a greater risk to the environment. Upgrading these tanks to double-wall systems helps ensure compliance with safety regulations aimed at preventing contamination from substances that can be damaging to both human health and the ecosystem.