Maine Oil Tank Removal: Cost, DEP Rules & Licensed Contractors (2026)

Average Oil Tank Removal Costs in Maine

Maine's rocky soil conditions can increase excavation costs vs. southern New England. Always get 3 quotes.

Maine DEP Regulations

Maine's underground storage tank program is administered by the Maine Department of Environmental Protection (DEP) under Chapter 691 rules. Key requirements:

• Licensed contractor required — UST removal must be performed by a Maine DEP-licensed contractor.
• Notification — Tank owners must notify DEP before decommissioning a regulated UST.
• Soil screening required — Soil samples must be collected at all four quadrants of the tank pit.
• Release reporting — Any release of petroleum must be reported to Maine DEP's 24-hour hotline (800-482-0777).
• Residential exemption — Heating oil tanks under 1,100 gallons for residential use are generally exempt from UST regulations but still need licensed decommissioning.

Removal Process in Maine

1. 1
   Site Assessment: A Maine-licensed contractor evaluates tank size, depth, access, and potential contamination indicators.
2. 2
   DEP Notification: Contractors notify Maine DEP before removal if the tank meets reporting thresholds.
3. 3
   Tank Decommissioning: Oil is pumped and properly disposed. Tank is cleaned and made inert before removal.
4. 4
   Excavation: Underground tanks require excavation. Maine soil conditions — often rocky — can increase excavation difficulty and cost.
5. 5
   Soil Sampling: Lab samples taken from the tank pit. Results in 1–2 weeks determine if remediation is needed.
6. 6
   Backfill & Restoration: Pit filled and surface restored. Keep the closure documentation for any future property sale.

Maine Cities We Cover

Maine-Specific Challenges

Rocky soil: Maine's glacially deposited rocky soil can make excavation more difficult and expensive than in sandy coastal states. Expect excavation costs to run 15–30% higher than average New England pricing.

Seasonal access: Ground frost makes winter excavation difficult. Spring and fall are the busiest times for tank removal in Maine. Book early.

Fuel oil dependence: Maine has one of the highest rates of home heating oil use in the country. Many older homes have large (275–500 gallon) tanks that have never been replaced. If your tank is over 20 years old, a proactive inspection is recommended.