Underground Storage Tank (UST) Program

Underground storage tank system illustration

UST Leak Prevention Programs

NOTICE: ADEQ will accept Tank Site Improvement Program applications from Wednesday, March 1, 2023, through 5 p.m., Friday, March 31, 2023 | View TSIP FAQs >

Leak prevention activities, also known as noncorrective actions, are proactive measures designed to prevent future releases, which can lead to costly cleanups. Eligible UST owners, operators and property owners may request financial assistance from ADEQ through either the Tank Site Improvement Program (TSIP) or State Lead Noncorrective Action Program.

Noncorrective actions include UST system removals, baseline assessments and sampling to confirm a suspected release. Under TSIP, funding is also available for UST system replacements and modifications to bring UST systems up to current performance standards.

Tank Site Improvement Program (TSIP)

UST owners, operators, and property owners may apply for funding to assist with UST system removal, replacement and modification to bring their UST systems aligned with current performance standards, baseline assessments and suspected release confirmation actions.1 Qualifying applicants must complete the approved actions and access approved funds by the statutory deadline. Under this program, the applicant is responsible for acquiring bids, managing the action, paying costs, and submitting a request for reimbursement | Learn about TSIP >

State Lead Noncorrective Action Program

UST owners, operators and property owners may request ADEQ to manage their UST removals, baseline assessments and suspected release confirmation actions on their behalf. UST replacement and modification are not eligible under this program | Learn about the State Lead Noncorrective Action Program >

1In accordance with Arizona Revised Statutes (ARS) § 49-1071, TSIP application funding is subject to the availability of monies in the UST revolving fund that have been allocated to the program.