California ICC UST Inspector Practice Exam

Before affixing a red tag on an underground storage tank, which documentation is mandatory?

1. Inspection date

2. Product level

3. Repair history

4. Operator's training records

The correct answer is: Product level

The correct choice of mandatory documentation before affixing a red tag on an underground storage tank is the product level. When a red tag is applied, it signifies that the tank is out of service due to safety or compliance issues, which could be related to a leak or other hazardous condition. Knowing the product level is crucial because it directly affects the risk assessment associated with the tank. Understanding the product level allows inspectors to gauge the potential environmental impact and safety hazards presented by the stored substances. For instance, if the tank is nearly full, the risks may vary significantly compared to a tank that has minimal contents. By documenting the product level, it ensures that the proper precautions can be taken for both human safety and environmental protection before any further actions, such as repairs or decommissioning, are initiated. Having information about the inspection date, repair history, and operator's training records is important for compliance and operational understanding, but they do not directly address the immediate safety concerns tied to the specific condition of the tank at the time of tagging. Thus, the product level is prioritized as essential documentation in this scenario.