Underground tanks that hold petroleum or a hazardous material (i.e. diesel, gasoline or oil) and those that hold more than 110 gallons and are not used for building heating are regulated.
The Minnesota Pollution Control Agency must be notified about all underground storage tanks (USTs) within 30 days of installation and about changes in tank status. To register a UST, complete and submit the UST registration form.
If your tanks are regulated
- You must have petroleum tank leak detection on all regulated tanks.
- You must perform line (pipe) leak detection on all regulated tank piping.
- You must upgrade all regulated tanks with corrosion protection (fiberglass tanks and/or piping do not require corrosion protection).
- You must have a corrosion protection test done on the tanks every three years.
- You must keep all records on file to prove you are in compliance.
- You must have Stage 1 vapor recovery installed on all retail gas tanks (except facilities located in the cities of Hanover and Rockford).
How to prepare for the inspection
- Know what kind of tank leak detection you use.
- If you use an automatic tank gauge, know how to use it.
- Know where your leak detection records are and have them ready.
- Provide access to all tanks and dispensers for visual inspection.
- Know where your emergency overfill alarm is and how it works.
- If you also service cars, know where your waste storage containers are.
- Know where your corrosion protection testing records are and have them ready.
- Know whether you have Stage 1 Vapor Recovery installed. To find out, contact the owner or your tank contractor.
- If you do not own the tanks, provide the owner's name, address and phone at the time of inspection.
Abandoned petroleum underground storage tanks
If you have an old petroleum underground storage tank on your property, you may qualify to have the tank removed for free.
To qualify:
- A tank is an underground petroleum storage tank that was taken out of service prior to December 22, 1988.
- If a tank was taken out of service after December 22, 1988, a tank may qualify if you can show that you could not have reasonably known of its existence at the time you first acquired title to the property.
If petroleum contamination from a leak is discovered and the Minnesota Pollution Control Agency requires an investigation, you must agree to proceed with it according to their policies and procedures. Costs associated with completing a necessary investigation are eligible for up to 90 percent reimbursement from the board.