Waste Programs Division: Underground Storage Tanks

The Waste Programs Division ensures proper operation and maintenance of regulated underground storage tank systems by conducting periodic inspections and assisting owners and operators in complying with applicable state and federal regulations. Enforcement actions are taken in cases of significant non-compliance. The division also protects public health and the environment through oversight, investigation and cleanup of soil and groundwater contamination caused by releases from underground storage tanks.

Tank pull

Fountain Hills Soil Vapor Sampling

Located approximately thirty miles northeast of downtown Phoenix, Fountain Hills, Arizona is known for the towering man-made fountain located in the center of town. ADEQ was there, working in a residential neighborhood near an elementary school as part of its State Lead underground storage tank program. The Lead program is so named because ADEQ assumes the responsibility for corrective actions where the responsible party is unknown, unwilling, or unable to undertake site investigations and cleanups. The purpose of testing soil vapor is to determine whether there is any risk to public health from the contaminated groundwater beneath the area. Twenty years ago there was a gas station across the street from the school that leaked contaminants into the soil and water. If there is contamination that requires cleanup, ADEQ will work to mitigate the risk so the public will be safe. The work is paid for by the penny-per-gallon tax on all fuels sold within Arizona.


Red Rock UST Removal

Located between Phoenix and Tucson off Interstate 10, Red Rock, Arizona is a mostly an agricultural area, although the city has recently seen construction of tract home communities. ADEQ was at an abandoned gas station as part of their State Lead program, so named because ADEQ takes charge of the underground storage tank removal and assessment for possible soil and groundwater contamination because the property has been abandoned. At this site, ADEQ removed three 8,000 gallon steel tanks used for gasoline storage and one 550 gallon tank used to house hazardous materials in order to adequately assess contamination risks. If there is contamination that requires cleanup, ADEQ will work to mitigate the risk so the area can be redeveloped.