Which monitoring method involves taking product readings at specific intervals?

The method that involves taking product readings at specific intervals is manual inventory control. This monitoring strategy requires operators to measure the amount of product in the tank regularly—typically on a daily, weekly, or monthly basis—depending on the facility's operational protocols. By keeping track of product levels over time, operators can detect any discrepancies between the amount of fuel delivered to the tank and the amount dispensed. This method can also help identify potential leaks or theft.

Manual inventory control is particularly valuable in situations where real-time monitoring technology is not available or where operators prefer to perform hands-on assessments. While it may not provide the immediacy that other methods offer, it creates a systematic approach to tracking product usage and maintaining records, which is crucial for compliance with environmental regulations related to underground storage tanks.