An automatic line leak detector can only be used if it detects what number of gallons per hour at 10 pounds per square inch line pressure?

The correct answer is based on the regulatory standards for the performance of automatic line leak detectors (ALLD) used in underground storage tank systems. An automatic line leak detector must have the capability to identify leaks at a threshold that ensures environmental protection and compliance with regulations.

In this case, detecting a leak rate of 3 gallons per hour at a line pressure of 10 pounds per square inch is a key performance criterion. This threshold is established to provide reassurance that the system can detect significant leaks early enough to prevent contamination of soil and groundwater.

Leak detection systems operate under specific guidelines that mandate detection rates to ensure they are effective. A detection capability of 3 gallons per hour at the specified pressure is considered adequate to flag potential leaks for further investigation.

Understanding these regulatory requirements is crucial for maintaining compliance and protecting the environment, as inadequate detection could lead to significant harmful impacts if leaks go unnoticed.