California ICC UST Inspector Practice Exam

What capability must automatic line leak detectors installed on single-walled pressurized piping have, as of December 22, 1998?

1. Restricting product flow

2. Triggering an audible and visual alarm

3. Shutting down the pumping system

4. Shutting off the flow at the dispenser

The correct answer is: Shutting down the pumping system

Automatic line leak detectors installed on single-walled pressurized piping are designed to monitor the integrity of the piping and detect leaks. As of December 22, 1998, these detectors must have the capability to shut down the pumping system. This requirement is crucial as it prevents further product loss into the environment and mitigates safety hazards associated with leaks. By shutting down the pumping system, the automatic line leak detector ensures a prompt response to a detected leak, thereby minimizing potential environmental contamination and ensuring compliance with safety regulations. This capability not only protects the surrounding environment but also safeguards public health and safety. The other options, while they may be features of a comprehensive leak detection system, do not specifically address the primary functional requirement as mandated by regulatory standards established at that time. This highlights the focus on immediate action to stop the leak through system shutdown rather than simply alarming or restricting product flow without stopping the leak in its early stages.