What to Know About Oil Tank Removal in Montana
Montana carries three active oil refineries at Billings plus an extensive pipeline and Bakken-corridor fuel network, which gives the state a dense commercial UST footprint for its modest population. The Montana DEQ Underground Storage Tank Program licenses UST contractors and regulates closure work under Title 75 Chapter 11 Part 5 of the Montana Code and ARM 17.56. DEQ requires a 30-day advance notice before any permanent tank closure and a 24-hour release report when contamination is confirmed. A DEQ-licensed tank contractor must perform the excavation, collect soil samples, and file the closure report. Property owners cannot legally abandon or partially close a regulated tank without that license.
Billings anchors Montana's commercial tank market thanks to three working refineries and the Yellowstone River industrial corridor. Missoula's Hellgate Valley, Great Falls along the Missouri, Bozeman's Gallatin Valley, and Helena add steady fleet-yard work. Butte and Anaconda carry a deeper contamination history from the region's Superfund legacy, which layers EPA oversight on top of state closure work. The Flathead Valley through Kalispell and Whitefish, Hi-Line communities from Havre to Wolf Point, and Bakken-corridor towns like Sidney and Glendive cycle fuel tanks tied to oilfield and rail operations. Rural eastern and central Montana still uses heating oil in older farm and ranch homes, and national-park gateway fueling at West Yellowstone, Gardiner, and East Glacier adds seasonal commercial turnover.
Residential pricing in Billings, Missoula, Bozeman, and Great Falls runs $1,200 to $2,800 for a standard buried tank with clean soil and machine access. Basement heating oil tanks in older Butte, Helena, and Kalispell homes climb to $2,500 to $4,500 due to tight foundation access and shoring needs. Commercial UST closure at Montana gas stations starts around $5,000 per tank and climbs with piping and pit size. Work inside the Butte-Anaconda Superfund zone or within one mile of the Yellowstone, Missouri, or Clark Fork rivers often triggers expanded sampling and longer timelines. If contamination surfaces, soil and groundwater remediation adds $10,000 to $50,000 or more. Montana's Petroleum Tank Release Compensation Board reimburses eligible owners for a significant share of corrective action costs up to a per-release cap, after a deductible, aligned with the federal LUST Trust Fund program. Our oil [tank removal cost](/oil-tank-removal-cost/) guide breaks down what drives the final invoice.
A straightforward Montana residential job wraps in one day on site, with soil laboratory results returning in five to ten business days. Basement tank work in older Butte and Helena homes stretches to two or three days when crews cut tanks inside foundations. November through March frost depth regularly exceeds four feet across the state, so most residential and commercial closure work compresses into an April through October window. If sampling flags petroleum, the site enters corrective action under Montana DEQ oversight, with timelines running weeks to many months. Before signing a contract, ask for the contractor's Montana DEQ UST license, a recent closure report from a comparable Montana job, and written pricing for both clean-soil and contaminated outcomes. Ready to start? find a tank contractor in Montana or request a free quote from professionals in your area.