What is the minimum leak detection requirement for automatic line leak detectors at a pressure of 10 psi?

The minimum leak detection requirement for automatic line leak detectors is designed primarily to identify leaks promptly and efficiently to prevent environmental contamination from underground storage tanks. When operating at a pressure of 10 psi, the requirement is set so that the leak detection mechanism can effectively identify significant leaks that may occur.

The correct answer reflects the regulatory guidance that specifies the minimum detection capability necessary for ensuring safety and compliance. According to this standard, an automatic line leak detector must be capable of detecting a leak rate of 3 gallons per hour at that specified pressure. This threshold is established to balance safety, environmental protection, and operational feasibility. In practice, setting the requirement at this level helps ensure that any significant issues are flagged before they lead to more serious problems.

The other leak rates provided are not in line with the specific regulatory requirement established for automatic line leak detectors operating under these conditions.