California ICC UST Inspector Practice Exam

What does CCR state about secondary containment for double wall systems?

1. It must have automatic line leak detectors

2. Should ensure no intrusion from precipitation

3. Must allow for a 0.1 gph annual test

4. Needs to have a product tight structure

The correct answer is: Should ensure no intrusion from precipitation

The correct choice highlights the requirement for secondary containment systems to protect against external factors, such as precipitation, which can compromise the integrity of the system. California Code of Regulations (CCR) specifies that secondary containment should be designed to prevent intrusion from rainwater or any other sources of water. This is crucial because water intrusion can affect the performance of the containment system, potentially leading to leaks or the degradation of materials used in construction. When precipitation enters a containment area, it can create a false sense of security regarding the system's effectiveness, as it may mask or cause a false reading of spill detection systems. By ensuring that there is no intrusion from precipitation, the design guarantees the secondary containment remains functional, and any leaks or spills can be easily detected and addressed. While the other options include relevant considerations for secondary containment systems—such as the need for automatic leak detectors and structural integrity—they are not about preventing external factors like precipitation from affecting the containment. Understanding this requirement emphasizes the importance of a comprehensive design approach that prioritizes the operational reliability of double wall systems.