California ICC UST Inspector Practice Exam

If a tank has an impressed current rectifier, how often should it be inspected?

1. Once every week.

2. Every 60 days.

3. Every 6 months.

4. The annual test is all that is required.

The correct answer is: Every 60 days.

The correct answer is that the tank with an impressed current rectifier should be inspected every 60 days. This frequency of inspection is crucial because impressed current cathodic protection (ICCP) systems, which are used to prevent corrosion on underground storage tanks, require regular monitoring to ensure they are functioning effectively. The reason for this 60-day interval is tied to maintaining the integrity and effectiveness of the rectification system. These systems can be influenced by various factors, including changes in environmental conditions, operational status, or potential disruptions in the rectifying current. Regular inspections help in identifying malfunctions or degradation in the system promptly, allowing for timely maintenance or repairs to prevent corrosion-related failures. Furthermore, while other options suggest differing frequencies, they either do not align with the recommended best practices for ICCP systems or do not provide a balance between diligence and practicality. Routine maintenance and inspection every 60 days ensure that any potential issues are caught early, thereby extending the lifespan of the storage tank and maintaining compliance with regulatory measures.