California Designated Operator Practice Exam

What is the maximum groundwater level that allows manual inventory reconciliation?

1. 10 feet below the tank

2. 15 feet below the tank

3. 20 feet below the tank

4. 25 feet below the tank

The correct answer is: 20 feet below the tank

The maximum groundwater level that allows for manual inventory reconciliation is set at 20 feet below the tank. This standard is important because it establishes a reasonable threshold for detecting potential leaks in underground storage tanks. When the groundwater level is above this threshold, it becomes increasingly difficult to accurately measure the inventory of fuel or other substances in the tank, as water can intermix with the product and distort readings. This 20-foot limit is determined to ensure sufficient accuracy and reliability in the inventory monitoring process, allowing operators to maintain compliance and fulfill environmental safety responsibilities. Manual reconciliation techniques can be used effectively under these conditions, thus ensuring proper management and oversight of the facility.