Revised On: Sept. 4, 2024 - 2:30 p.m.

ADEQ’s UST Program is responsible for protection of public health and the environment by preventing, detecting, and cleaning up releases of petroleum and other regulated substances from USTs into groundwater, surface water, or soils. In the event a release from an underground storage tank (UST) occurs, ADEQ oversees the characterization and cleanup work to ensure remediation standards are met to protect public health and the environment. UST owners and operators (responsible parties or “RPs”) are required to conduct corrective actions in response to a confirmed release from a regulated UST system. 

Failure to address corrective action requirements in a timely manner may result in costly enforcement actions and may lead to soil and groundwater contamination, potential third-party liability, and devaluation of the subject property and potentially adjacent properties.

Tips for Hiring an Environmental Consultant for Your UST Facility

UST owners and operators are required to use an Arizona-registered environmental professional to complete corrective action work. There are important factors to consider when selecting a qualified environmental professional for your facility | Learn More >

Preapproval Program

UST owners and operators are required to maintain financial responsibility to ensure funding is available for cleanup. UST owners and operators may qualify for funding assistance for corrective action work and costs that are not covered under their financial assurance mechanism(s) | Learn More >