UST systems used to store hazardous liquids must be designed, constructed, and installed to prevent the release of regulated substances to the environment at any time during the operational life of a tank system, and:Control the rate of any spill so it does not migrate off$-$siteMeasure changes in inventory for potential product lossUse an automatic tank gauging systemContain a leak or spill from the system until the leak or spill is detected and removed