If you are involved in the permanent closure and/or replacement of an underground storage tank (UST) or aboveground storage tank (AST) system or tank components such as underground piping, piping sumps or spill containment, it is important to familiarize yourself with the recent changes to the New Hampshire Department of Environmental Services (DES) guidance document titled"Requirements for Underground and Aboveground Storage Tank System and System Component Closure Sampling & Reporting" and to the UST/AST Closure Notification form. UST removalsUST RegulationsUSTunderground storage tankspermanent tank closureNH DESgas station tanksGas StationUST RulesState Regulations