Underground Storage Tank (UST) Program

Underground storage tank system illustration

Tank Site Improvement Program

NOTICE: Tank Site Improvement Program (TSIP) applications will be accepted starting Monday, Aug. 23, 2021, through Friday, Oct. 8, 2021. Learn about the recent changes to TSIP and more | View Summary of Updates | View TSIP FAQs >

TSIP provides financial assistance to UST owners, operators and property owners of sites with USTs for specific tank site improvements that help prevent future costly cleanup activities. By statute, TSIP application funding is subject to the availability of monies in the UST revolving fund that have been allocated to the program.1

Applicants are responsible for submitting an application for ADEQ approval, acquiring bids, managing and funding contracted work and submitting costs for reimbursement. Once an application is approved by ADEQ, applicants should complete the ADEQ-preapproved work and request reimbursement as soon as possible and in no later than 545 days | Steps to Apply >

Reimbursement Funding Is Available Up to $300,000 per Facility and Includes:

  • Up to $200,000 per site for UST system replacement or modification 
  • Up to $40,000 per event for baseline assessments
  • Up to $25,000 per tank for UST removal and up to $15,000 per site for over-excavation of petroleum contamination, if required 
  • Up to $20,000 per event for suspected release confirmation sampling 

Learn more about eligible actions >


View the most frequently asked questions about TSIP | View TSIP FAQs >

If you need additional information, contact the UST Outreach Coordinator (see sidebar).