Underground Storage Tank (UST) Program

Underground storage tank system illustration

Financial Responsibility Options for USTs

Commercial Liability Insurance

This is the simplest and most common insurance option in Arizona. Commercial liability insurance works similarly to a car insurance policy—an owner or operator may purchase a UST policy from an insurer for an agreed upon premium. The insurer then agrees it will cover the insured facilities up to a certain amount above an agreed upon premium. The insurer will also provide the documentation to demonstrate financial responsibility compliance.

What to Submit for Commercial Liability Insurance | Watch Video >

The following forms should be submitted to ADEQ's UST Financial Responsibility Liaison at ustfr@azdeq:

  • UST Financial Responsibility Form | Go to Form >
  • Certificate of Insurance or an Endorsement and a Schedule of Covered Tanks (must include EPA-required language)1
  • Tank Schedule, with a retroactive date listed. If it is not listed here, it is acceptable as long as it is listed on another official policy document and compliant with ARS 49-1006.01.C. 

Alternative Forms of Financial Responsibility

What to Submit for Alternative Options

  • UST Financial Responsibility Form | Go to Form >
  • Depending upon the mechanism utilized, there may be different requirements. Read the Alternative Forms of Financial Responsibility pages linked above to find out more.