California ICC UST Inspector Practice Exam

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

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

The correct answer reflects the standard protocol for leak testing in conjunction with an Automatic Tank Gauge (ATG) system. Specifically, regulations typically require that a leak test with a detection threshold such as 0.2 gallons per hour should be conducted at a minimum frequency of once a month. This frequency is established to ensure sufficient monitoring of tank systems, which is crucial for preventing environmental contamination and ensuring the integrity of the fuel storage system. Monthly testing strikes a balance between maintaining operational efficiency and safeguarding against the risks presented by potential leaks. It aligns with regulatory standards that aim to maintain environmental protection and compliance with safety measures. This frequency allows for timely detection of leaks, enabling swift action to mitigate any risks associated with tank failures. In contrast, the other options suggest different frequencies that do not meet the established guidelines or may not provide sufficient monitoring to comply with safety and environmental regulations.