California Designated Operator Practice Exam

What is the maximum leak detection rate for an automatic tank gauge method?

1. 0.5 gallon/hour

2. 0.3 gallon/hour

3. 0.2 gallon/hour

4. 0.1 gallon/hour

The correct answer is: 0.2 gallon/hour

The maximum leak detection rate for an automatic tank gauge method is established at 0.2 gallon per hour. This rate is based on performance standards set forth to ensure environmental and public safety, especially concerning potential leaks from underground storage tanks. Automatic tank gauges (ATGs) utilize sophisticated technology to monitor the levels of product within the tank continuously. A detection rate of 0.2 gallon per hour allows operators to identify potential leaks before they become significant issues, thus minimizing the risk of environmental contamination or financial loss. This leak detection sensitivity is particularly effective in preventing and addressing leaks that may not be noticeable right away but could pose a long-term risk. The choices that suggest higher leak detection rates are less sensitive and do not align with the stringent regulations aimed at protecting the environment. A 0.3 gallon per hour rate suggests that larger leaks could potentially go undetected for longer periods, which is contrary to the objective of an effective leak detection system. Hence, the 0.2 gallon per hour rate is the standard for adequate leak detection in the automatic tank gauge method, ensuring that any leaks are promptly identified and addressed.