Underground Storage Tank (UST) Program

Underground storage tank system illustration

UST Regulatory Updates & Compliance Information

On Oct. 13, 2015, the Environmental Protection Agency's (EPA’s) revised undergound storage tank (UST) regulations became effective. Arizona House Bill 2636, approved by Governor Doug Ducey on April 9, 2015, also revised Arizona UST statutes. EPA has the authority to enforce federal regulations under federal law and Arizona does not have EPA State Program approval. Therefore, UST owners and operators of UST systems in Arizona must comply with both federal and state UST regulations. 
 

Compliance deadlines for the federal UST regulations range from Oct. 13, 2015, to Oct. 13, 2018, for USTs installed on or before Oct. 13, 2015. USTs installed on or after Oct. 13, 2015, must fully comply with both new federal and state UST regulations. Revised statutes impact owners, operators, property owners and insurance companies in several ways.

Changes effective July 3, 2015:

  • UST owners and operators are required to notify ADEQ at least 30 days PRIOR to bringing a tank into operation.
  • UST owners who sell tanks for use as USTs are required to provide documentation that they notified the purchaser of requirements to file updated notification forms to ADEQ.
  • Non-payment of taxes and fees, if not timely corrected, may lead to delivery prohibition.

 Learn more about notifying ADEQ about your UST | Learn More >

Financial Responsibility Related Requirements

  • UST insurers are required to notify ADEQ within 30 days after the UST insurance policy termination or non-renewal.
  • Existing insurance policies that are renewed with a more current retroactive date will not satisfy financial responsibility unless a new tank system was installed or a baseline assessment performed.
  • UST owners and operators may request ADEQ’s assistance in pursuing coverage under the financial assurance mechanism they rely upon to demonstrate compliance with financial responsibility.

​Learn more about Financial Responsibility | Learn More >

Leak Prevention, Removal and Release Confirmation

  • Tank Site Improvement Program: UST owners and operators may apply for grants under a new program to assist with UST removal, UST system upgrades and release confirmation actions. UST owners and operators who qualify for grant funding will have up to one year to fulfill the grant and access approved funds. Under this program, the grant applicant will be responsible for acquiring bids, managing the action and submitting costs | Learn More >
  • State Lead Program: UST owners and operators who don’t wish to manage grant projects themselves, may request ADEQ to manage UST removals and release confirmation actions on their behalf | Learn More >
Release Cleanup
  • State Lead Program: UST owners and operators and property owners with UST contamination may request ADEQ to manage their cleanup. Eligibility requires the UST owner and operator to file a timely claim against their financial responsibility mechanism and pursue that claim. While pursuing the claim, ADEQ will manage their cleanup. In the case of a property owner who is not an owner or operator, ADEQ may have a lien on the property for unrecovered costs. (This may NOT be used to demonstrate compliance with financial responsibility.) | Learn More >
  • Preapproval Program: UST owners and operators and property owners with UST contamination may qualify for this cleanup program. Participants will be required to meet with ADEQ to develop a preapproval scope of work, schedule, budget, and application. (This may NOT be used to demonstrate compliance with financial responsibility.) | Learn More >

For assistance keeping your UST system in compliance with federal regulations | View Compliance Summary >