California ICC UST Inspector Practice Exam

What is the minimum leak detection capability required for automatic line leak detectors?

1. 3-gallon per hour leak rate at 5 psi within 1 hour

2. 0.1-gallon per hour leak rate at 5 psi within 1 hour

3. 3-gallon per hour leak rate at 10 psi within 1 hour

4. 0.1-gallon per hour leak rate at 10 psi within 1 hour

The correct answer is: 3-gallon per hour leak rate at 10 psi within 1 hour

The minimum leak detection capability required for automatic line leak detectors is defined by regulations that aim to ensure early detection of leaks to prevent environmental contamination and protect public health and safety. The correct option indicates a leak detection capability of 3 gallons per hour at 10 psi within 1 hour. This standard reflects the necessity for leak detection systems to reliably identify significant leaks in a timely manner. A leak rate of 3 gallons per hour is indicative of a more substantial leak than lower thresholds, ensuring that systems can detect more critical failures effectively. The pressure of 10 psi provides a robust operating condition, reflecting a typical scenario where systems may experience real-world stresses that could lead to leaks. The one-hour timeframe further emphasizes efficiency in monitoring, allowing for prompt response actions. Such requirements align with best practices and regulatory guidelines aimed at safeguarding environmental safety and ensuring compliance in the operation of underground storage tanks.