California Designated Operator Practice Exam

What key feature must all new underground storage tanks have?

1. Primary containment only

2. Single wall construction

3. Primary and secondary containment

4. Visible inspection openings

The correct answer is: Primary and secondary containment

The key feature that all new underground storage tanks must have is primary and secondary containment. This design requirement is critical for environmental protection and safety. Primary containment refers to the tank itself, which is designed to hold the stored substance securely. However, the secondary containment serves as an additional protective layer, preventing leaks or spills from contaminating the surrounding soil and groundwater. This is particularly important in California, where the environmental regulations are strict due to the state's unique geological and hydrological conditions. By ensuring that each new underground storage tank has both primary and secondary containment, the risk of environmental contamination is significantly reduced, helping to protect public health and the environment. This dual-layer system is a proactive measure that enhances safety protocols related to hazardous materials storage.