How Wyoming Regulates UST Closure and the Storage Tank Program
Wyoming oil tank removal runs through the Wyoming DEQ Storage Tank Program. WDEQ administers USTs under the Wyoming Storage Tank Act, W.S. 35-11-1414 through 35-11-1432, and federal 40 CFR 280 rules. Wyoming DEQ licenses tank installers and testers, but tank removal contractors are not separately licensed for commercial UST closure at gas stations, Powder River Basin oilfield support yards, and industrial sites. Residential heating oil tanks are uncommon across Wyoming because natural gas and propane dominate, though legacy tanks occasionally surface in older Cheyenne, Laramie, and Casper neighborhoods during real estate transactions.
Wyoming tank removal work concentrates in the Cheyenne metro along I-80 and I-25 through gas stations and fleet yards. Casper anchors central Wyoming demand through oilfield service yards, refinery-corridor fueling, and the I-25 truck-stop network. Gillette and the Powder River Basin drive heavy commercial UST activity at coal, coalbed methane, and oilfield service operations. Rock Springs and Green River add trona mining-support tank work. Laramie cycles University of Wyoming-adjacent fueling. Sheridan and the Bighorn Basin add ranch and agricultural fuel storage. Yellowstone-gateway communities around Jackson and Cody see seasonal tourism-fueling tank closures. Winter frost halts most excavation from November through March.
Commercial UST closure at Wyoming gas stations typically runs $5,000 to $15,000 per tank. Powder River Basin multi-tank oilfield closures reach $20,000 to $50,000 depending on piping and site size. Residential heating oil tank removal in older Cheyenne, Casper, or Laramie neighborhoods runs $1,500 to $3,500. If soil sampling exceeds WDEQ cleanup thresholds, soil remediation adds $10,000 to $50,000 or more, with Yellowstone and Teton watershed proximity triggering expanded sampling. Instead of reimbursing owners, the Wyoming Storage Tank Program cleans up eligible sites itself, in priority order, paid from the state corrective action account. Our national cost guide breaks down pricing.
A typical Wyoming commercial closure starts with Wyoming One-Call locates, WDEQ notification, tank pumping, degassing, excavation, and soil sampling. A single-tank Cheyenne or Casper closure wraps in two to three days. Powder River Basin multi-tank pulls stretch across a week. Soil laboratory turnaround runs seven to fourteen business days. Winter frost and high-elevation cold routinely halt excavation from November through March, compressing work into the April through October window. Before signing, ask for the Wyoming DEQ license of any installer or tester working on site, and a closure report from a comparable Cheyenne, Casper, Powder River Basin, or Yellowstone-gateway job. Ready to start? tank contractors in Wyoming or get a free quote from professionals in your area.