California ICC UST Service Technician Practice Exam

What is an approved method for non-visual monitoring for existing UST systems?

1. Manual inventory reconciliation

2. Statistical Inventory Reconciliation (SIR)

3. Visual site inspection

4. Electronic monitoring

The correct answer is: Statistical Inventory Reconciliation (SIR)

Statistical Inventory Reconciliation (SIR) is an approved method for non-visual monitoring of existing Underground Storage Tank (UST) systems. This method involves using statistical analysis to compare the amount of fuel received and dispensed from the tank with the amount of product remaining. By integrating various factors such as sales data, delivery records, and historical loss data, SIR can effectively identify leaks and discrepancies in inventory levels without needing a visual inspection. SIR is advantageous because it allows for continuous monitoring and can detect potential leaks that may not be obvious through visual inspections or manual methods. It provides a more analytical and systematic approach to monitoring UST integrity, making it a preferred choice among regulatory bodies. In contrast, manual inventory reconciliation is a more rudimentary approach that relies heavily on the accuracy of manual records and does not offer the statistical rigor that SIR provides. While electronic monitoring is also a valid option, it is distinct from SIR and includes technologies specifically designed for the continuous monitoring of UST systems. Visual site inspections, while important, do not qualify as non-visual monitoring as they involve direct observation rather than data analysis.