Underground Storage Tanks (UST) Update Rulemaking

Final rule

The effective date of the final rule is April 29, 2019. The Minnesota Office of the Revisor of Statutes updated the online rule version as of June 6, 2019.

PDF icon Notice of adoption (April 22, 2019)

HTML icon Minnesota Rules - Underground Storage Tanks; Program (Chapter 7150)

Contacts for rule adoption

Contact your local tank program inspector with questions on implementation: PDF icon Regional map of tank inspectors (t-u1-21)


In Minnesota, there are about 18,000 regulated underground storage tanks (UST) currently in use. The tanks are regulated by the UST program. UST regulations were first implemented by MPCA in 1988 primarily to prevent releases of petroleum products and hazardous substances from gas stations and other facilities into the environment. The regulations were subsequently amended to address federal language changes.

The underground tank rule is designed to prevent improper design, installation, use, maintenance, and closure of UST systems which includes the tanks, piping, and dispensers. The MPCA identified a need to revise the UST regulations to incorporate U.S. Environmental Protection Agency changes to the UST program as well as to update outdated portions of the regulations due to changes in technology since the 1980s. Program knowledge gained during the last 20 years was used to update and revise the regulations to make targeted changes to improve implementation and prevent UST releases.


PDF icon Request for comments (Nov. 9, 2015)

PDF icon Dual notice (Aug. 27, 2018)

PDF icon Statement of Need and Reasonableness

PDF icon Rule draft

PDF icon Rule hearing transcript: October 25, 2018 (ust-rule1-10)

PDF icon Rule hearing record: October 25, 2018 (ust-rule1-09)

PDF icon Administrative Law Judge report