California ICC UST Inspector Practice Exam

What is the required detection capability of automatic line leak detectors?

1. Detect a 3-gallon per hour leak at 10 psi within 1 hour

2. Detect a 5-gallon per hour leak at 5 psi within 1 hour

3. Detect a 1-gallon per hour leak at 10 psi within 1 hour

4. Detect a 10-gallon per hour leak at 10 psi within 1 hour

The correct answer is: Detect a 3-gallon per hour leak at 10 psi within 1 hour

The required detection capability of automatic line leak detectors is established to ensure that leaks in underground storage tank (UST) systems are identified quickly and efficiently to prevent environmental contamination. The standard typically requires that these detectors demonstrate the ability to detect a leak of 3 gallons per hour at a pressure of 10 psi within a maximum time frame of 1 hour. This level of sensitivity is crucial for minimizing potential risks associated with product loss and contamination of surrounding soil and groundwater. The specification of detecting a 3-gallon per hour leak reflects a balance between being sensitive enough to identify potential issues early and being practical in terms of operational parameters, such as pressure and time. The pressure condition set at 10 psi ensures that the system can remain functioning under typical operational scenarios while still being capable of identifying leaks effectively. This capability aligns with regulatory requirements and best practices designed to protect the environment and ensure public safety. By successfully identifying leaks at this specified rate and pressure, the system can facilitate timely intervention measures to address the leaks, thereby minimizing potential harm.