Regulated Storage Tanks

ADEQ’s Regulated Storage Tanks Division (RST) drafts, administers, and enforces state regulations pertaining to underground storage tanks, as well as aboveground petroleum storage tanks. These tanks are primarily located at retail gasoline and diesel sales facilities but may also include bulk petroleum storage facilities, private fleet fueling facilities, schools, health facilities, and emergency generating stations.

Prior to the mid-1980s, underground storage tanks had been regulated piecemeal by the federal government through various environmental statutes. When studies revealed growing problems with a large number of tank systems, along with potential for future problems, Congress mandated changes that were initiated by the states. These standards focused on new tank system installation standards, existing tank upgrades, registration requirements, closure requirements, and corrective action requirements.

Besides overseeing the regulatory program, the division administers a trust fund for storage tank owners to help them meet their financial responsibility requirements or use for cleanup costs. The agency also may activate the fund for emergencies associated with storage tanks.