We establish the normal operating pattern for each tank by creating a statistical model, which takes into account such factors as fuel supply terminal, pump calibration, fuel grade, time of year and daily sales.

When a tank or pipework starts to leak the smallest change in daily variance (loss or gain) triggers an alarm, which is investigated by the site's dedicated wetstock analyst.

Our average leak detection rate is 2.9 litres per day. Leaks detected early enough will prevent pollution and subsequent remediation and business disruption costs.