When do periodic Automatic Tank Gauge (ATG) tests gather data?

Periodic Automatic Tank Gauge (ATG) tests are designed to gather accurate data regarding the levels of liquid in the storage tanks, as well as any potential leaks. Conducting these tests during times when the facility is closed ensures that the readings are not influenced by external factors such as fluctuations in tank levels due to fuel dispensing.

When the facility is closed, there are typically no transactions or activities that could disrupt the stability of the fuel levels in the tanks. This allows for a more precise measurement, providing reliable data to assess the integrity of the underground storage tank system. Performing the tests during downtime minimizes the risk of false positives or inaccuracies that could arise from ongoing operations, such as fuel delivery or customer transactions, that might cause minor level changes.