California ICC UST Inspector Practice Exam

How often must a 0.2 gallon/hour leak test be performed when using an ATG system to monitor a tank?

1. At least once daily

2. At least once monthly

3. At least once yearly

4. As specified by the equipment manufacturer

The correct answer is: At least once monthly

A 0.2 gallon/hour leak test must be performed at least once monthly when using an Automatic Tank Gauge (ATG) system to monitor a tank. Regular leak testing is a critical component of tank management and environmental protection, as it helps to ensure the integrity of the tank and its associated systems. Monthly testing aligns with regulatory requirements and industry standards, which emphasize the need for frequent checks to detect even minor leaks that could lead to environmental contamination. This proactive monitoring is essential for compliance with environmental regulations and helps to mitigate risks associated with fuel storage. While daily or yearly testing might seem like adequate intervals in certain contexts, monthly assessments strike a balance between thoroughness and practicality, allowing for early detection of leaks without imposing undue burden on operators. Additionally, the equipment manufacturer may provide specific recommendations that align with standards, but the baseline requirement established by regulatory bodies is monthly testing for this type of leak detection.