California ICC UST Inspector Practice Exam

What is the required capability of automatic line leak detectors installed on underground pressurized piping?

1. Detect a 5-gallon per hour leak rate at 15 psi

2. Detect a 3-gallon per hour leak rate at 10 psi

3. Detect a 2-gallon per hour leak rate at 5 psi

4. Detect a 10-gallon per hour leak rate at 5 psi

The correct answer is: Detect a 3-gallon per hour leak rate at 10 psi

Automatic line leak detectors (ALLDs) are essential components in the management and monitoring of underground storage tank systems. They are specifically designed to identify leaks in pressurized piping connected to these tanks. The requirement for these detectors is established by regulations to ensure environmental protection and compliance. Choosing the option that reflects a 3-gallon per hour leak rate at 10 psi aligns with the standard performance criteria for these devices. The 3-gallon per hour threshold represents a balance between sensitivity and practical application, allowing for early detection of leaks before they can lead to significant environmental harm or regulatory violations. The pressure specification of 10 psi indicates that the detector is calibrated to function effectively under typical operating conditions within pressurized systems, ensuring reliability across various scenarios. The need for such specifications emphasizes the importance of rigorous monitoring in preventing potential contamination of soil and groundwater caused by leaks in underground storage tanks. Ultimately, the correct option encapsulates the industry standards that fulfill regulatory obligations and promote environmental safety.