California ICC UST Inspector Practice Exam

The primary purpose of interstitial monitoring is to detect the presence of liquid between the primary and secondary containment. This method is essential for identifying potential leaks from underground storage tanks, as it allows for the early detection of hazardous materials that may escape the primary containment. By monitoring the area between the two containment layers, operators can quickly respond to any leaks, ensuring environmental safety and compliance with regulations.

This monitoring system is crucial for environmental protection, particularly in California, where stringent regulations govern underground storage tank operations. It helps in minimizing the risk of contamination to surrounding soil and groundwater, providing a proactive approach to leak detection and management. Therefore, interstitial monitoring plays a vital role in maintaining system integrity and safeguarding against potential environmental hazards.