California ICC UST Inspector Practice Exam

The probability of detection required for leak detection methods must be at least what percentage?

1. 90%

2. 99%

3. 0.005%

4. 95%

The correct answer is: 95%

In the context of leak detection methods, the probability of detection is a critical factor that ensures the integrity of underground storage tank (UST) systems and helps prevent environmental contamination. The requirement for a minimum probability of detection is essential for effective monitoring and compliance with regulatory standards aimed at safeguarding public health and the environment. A probability of detection of at least 95% means that the leak detection system is statistically reliable in identifying leaks in USTs. This level of confidence ensures that the likelihood of failing to detect a leak (the false negative rate) is sufficiently low. By requiring a 95% probability, regulators can be confident that most leaks will be detected before they lead to significant adverse effects, thereby minimizing environmental impacts and protecting water resources. In summary, the requirement for a minimum of 95% probability of detection is based on regulatory standards that aim to balance safety and practicality, ensuring that UST systems are managed effectively to prevent leaks from going undetected.