An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to www.epa.gov. This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Underground Storage Tanks (USTs)

Underground Storage Tank (UST) Technical Compendium about the 1988 UST Regulations

This compendium contains EPA’s interpretations and guidance regarding the underground storage tank (UST) regulations issued in 1988. Questions and answers are presented in six general categories: