California ICC UST Inspector Practice Exam

How frequently should a 0.2 gallon/hour leak test be performed on a single-walled tank that uses an automatic tank gauge?

1. At least once daily.

2. As specified by the equipment manufacturer.

3. At least once monthly.

4. At least once yearly.

The correct answer is: At least once monthly.

The requirement for performing a 0.2 gallon/hour leak test on a single-walled tank that uses an automatic tank gauge is rooted in regulatory and safety practices to ensure ongoing monitoring and environmental protection. For this specific situation, performing the leak test at least once monthly aligns with regulatory standards set by agencies such as the U.S. Environmental Protection Agency (EPA) and applicable state regulations. Frequent testing allows for early detection of leaks, which is crucial in preventing environmental contamination and safeguarding public health. Monthly testing is a balance that ensures regular oversight without overwhelming tank operators with excessively frequent checks. Other choices, such as daily testing or yearly testing, may either pose impractical operational burdens or fail to provide sufficient oversight to detect leaks in a timely manner. Hence, the recommendation for monthly testing is a pragmatic approach to maintain safety and compliance in fuel storage operations.