Oil Tank Removal in Colorado, Colorado

Looking for professional oil tank removal services in Colorado, Colorado? Whether you need to remove an underground storage tank (UST) buried in your yard or an above-ground tank (AST) sitting in your basement, hiring a licensed and insured contractor is the only safe and legal way to handle the job. Oil tank removal in Colorado is regulated by Colorado Department of Labor and Employment - Division of Oil and Public Safety, which requires proper permitting, soil sampling, and certified disposal — making it critical to work with experienced professionals who understand CO environmental compliance. Our directory connects Colorado homeowners with vetted, licensed tank removal contractors who can handle everything from permit applications to final soil closure reports, so you can protect your property value and avoid costly environmental violations.

Average Cost
$1,600-3,200
Permit Cost
$75-200
Timeframe
1-2 days for removal, 1-2 weeks for full closure
Contractors Listed
Coming Soon

Key Takeaways: Oil Tank Removal in Colorado

  • Oil tank removal in Colorado requires permits from Colorado Department of Labor and Employment - Division of Oil and Public Safety and must be performed by licensed contractors
  • Average cost ranges from $1,600-3,200 for standard residential tank removal, not including potential soil remediation
  • Soil sampling is mandatory in Colorado — contamination can add $12,000-40,000 in remediation costs
  • The process typically takes 1-2 days for removal, with soil test results available in 3-5 business days
  • Permits cost $75-200 in Colorado and must be obtained before any work begins
  • Homeowners selling property should budget 4-6 weeks for the complete removal and closure process

About Oil Tank Removal in Colorado

Oil tank removal is the process of safely extracting old heating oil storage tanks from residential and commercial properties, and it involves far more than simply pulling a tank out of the ground. A licensed contractor will first obtain the required permits from Colorado Department of Labor and Employment - Division of Oil and Public Safety (typically costing $75-200 in Colorado), then drain and clean the tank interior of all remaining fuel oil and sludge. For underground tanks, the crew excavates the surrounding soil using a backhoe or mini excavator, carefully lifting the tank to avoid rupturing corroded walls that could release contaminants into the soil. Once the tank is removed, soil samples are collected from the tank grave — this is mandatory in Colorado — and sent to a certified laboratory for analysis of total petroleum hydrocarbons (TPH), volatile organic compounds (VOCs), and other contaminants. The excavation is then backfilled with clean, certified fill material and compacted to grade. In Colorado, the average residential oil tank removal costs $1,600-3,200, though prices vary significantly based on tank size (275, 550, or 1,000 gallons), depth of burial, accessibility for excavation equipment, and whether soil contamination is discovered during the process.

Heating oil common in mountain communities and older Denver homes.

When You Need Oil Tank Removal in Colorado

Selling your home — most buyers, lenders, and title companies in Colorado require proof that underground oil tanks have been removed or properly abandoned before closing. A buried tank can delay or kill a real estate transaction entirely.
Tank has reached end of useful life — underground steel tanks typically last 15-25 years before corrosion compromises their structural integrity. If your tank was installed before 2000, it's likely past its safe service life and at risk of leaking.
Switching heating systems — converting from oil heat to natural gas, propane, or electric heat pump means the old oil tank is no longer needed and becomes an environmental liability sitting on your property.
Visible signs of corrosion or leaking — if you notice oil sheens in puddles near fill pipes, petroleum odors in your soil or basement, or dying vegetation above where the tank is buried, these are urgent warning signs of an active leak.
Mortgage refinancing requirements — many lenders in Colorado now require tank sweeps and removal of underground tanks as a condition of refinancing, even if you're not selling the property.
Insurance company mandates — homeowner's insurance carriers increasingly require disclosure and removal of underground oil tanks, and some will cancel coverage if a known UST isn't addressed.
Property development or renovation — if you're planning an addition, pool, patio, or any construction that involves excavation near a buried tank, removal is typically required before work can begin.
Proactive environmental protection — even if not legally required right now, removing an aging underground tank eliminates the risk of a catastrophic leak that could cost $12,000-40,000 or more in soil and groundwater remediation.

The Tank Removal Process in Colorado: Step by Step

1

Permit Application & Scheduling

Your contractor files the required tank removal permit with Colorado Department of Labor and Employment - Division of Oil and Public Safety or your local municipality. In Colorado, permits typically cost $75-200 and may take 5-10 business days to process. During this time, the contractor will also call 811 to mark underground utilities (gas, electric, water, sewer, cable) in the excavation area.

2

Tank Preparation & Oil Removal

On the day of removal, the crew pumps out all remaining heating oil from the tank using a vacuum truck. Even tanks that have been 'empty' for years contain residual oil and sludge that must be professionally extracted. The recovered oil is transported to a licensed recycling facility.

3

Excavation & Tank Extraction

For underground tanks, a mini excavator or backhoe carefully removes the soil surrounding the tank, typically excavating 2-3 feet beyond the tank walls on all sides. The tank is inspected for holes, corrosion, and signs of leakage before being lifted out of the ground using chains or straps attached to the excavator.

4

Soil Sampling & Laboratory Analysis

Once the tank is out, soil samples are collected from the bottom and sidewalls of the excavation at locations specified by Colorado regulations. Samples are sent to a CO-certified environmental laboratory for analysis. Results typically take 3-5 business days and will determine whether additional remediation is needed.

5

Tank Transportation & Certified Disposal

The removed tank is loaded onto a flatbed truck and transported to a licensed scrap metal facility or tank disposal yard. Your contractor provides a certificate of disposal, which becomes part of your permanent closure documentation.

6

Backfill & Site Restoration

Assuming soil samples come back clean (below Colorado regulatory action levels), the excavation is backfilled with certified clean fill material, compacted in lifts to prevent settling, and the surface is restored with topsoil. If contamination is found, remediation must be completed before backfilling.

7

Closure Documentation & Regulatory Filing

Your contractor prepares a comprehensive closure report including photos, soil sample results, disposal certificates, and permit documentation. This report is filed with Colorado Department of Labor and Employment - Division of Oil and Public Safety and a copy is provided to you — keep this permanently, as you'll need it for any future property sale or refinancing.

8

Final Inspection & Sign-Off

In some Colorado municipalities, a local inspector or Colorado Department of Labor and Employment - Division of Oil and Public Safety representative may conduct a final site visit to verify proper closure. Once approved, you'll receive official closure status, confirming the tank has been properly removed in compliance with all CO regulations.

Oil Tank Removal Cost Breakdown in Colorado

Understanding the full cost of oil tank removal in Colorado helps you budget appropriately and evaluate contractor quotes. Here's a detailed breakdown of what you can expect to pay:

Cost ItemEstimated Cost
Permits & Regulatory Fees$75-200
Tank Pumping & Cleaning$300-600
Excavation & Tank Removal$800-2,500
Soil Sampling & Lab Analysis$400-800
Backfill & Site Restoration$300-800
Tank Disposal Fee$100-300
Closure Report & DocumentationOften included
Soil Remediation (if needed)$12,000-40,000
Permits & Regulatory Fees: Required before any work begins. Filed with Colorado Department of Labor and Employment - Division of Oil and Public Safety or local municipality.
Tank Pumping & Cleaning: Removal of remaining oil, sludge, and vapors from the tank interior.
Excavation & Tank Removal: Varies by tank size, depth, and site accessibility. Larger tanks and difficult access increase cost.
Soil Sampling & Lab Analysis: Mandatory in Colorado. Typically 2-4 samples analyzed for TPH and VOCs.
Backfill & Site Restoration: Certified clean fill, compaction, and surface restoration with topsoil.
Tank Disposal Fee: Transport and disposal at certified facility. Includes disposal certificate.
Closure Report & Documentation: Some contractors charge $200-400 separately for comprehensive closure reports.
Soil Remediation (if needed): Only required if contamination is found. This is the biggest variable cost.

Colorado Oil Tank Removal Regulations & Requirements

Regulatory Authority
Colorado Department of Labor and Employment - Division of Oil and Public Safety
Permit Required
Yes
Permit Cost
$75-200
Soil Type
Rocky mountain soil, clay
Notable Requirements
State-licensed contractors required. Soil samples mandatory at removal.

Environmental Considerations for Oil Tank Removal in Colorado

Why Environmental Protection Matters

Oil tank removal in Colorado carries significant environmental implications that every homeowner should understand. The Rocky mountain soil, clay found throughout the state can either accelerate or slow the migration of petroleum contaminants through the ground. When a buried steel tank corrodes and leaks, heating oil seeps into the surrounding soil and can eventually reach the groundwater table, creating a contamination plume that spreads far beyond your property boundaries. Colorado Department of Labor and Employment - Division of Oil and Public Safety enforces strict cleanup standards because petroleum contamination can affect drinking water wells, streams, and wetlands. In Colorado, soil remediation costs average $12,000-40,000, but severe contamination cases involving groundwater impact can exceed $100,000. This is why proactive tank removal — before a catastrophic failure occurs — is both the environmentally responsible and financially prudent choice. Homeowners should also be aware that Colorado law may hold property owners liable for contamination cleanup costs regardless of whether they installed the tank or caused the leak, making it essential to address aging underground tanks promptly.

Oil Tank Removal in Colorado: Frequently Asked Questions

Get answers to the most common questions about oil tank removal in Colorado, including costs, regulations, timelines, and what to expect.

How much does oil tank removal cost in Colorado, Colorado?
In Colorado, Colorado, oil tank removal typically costs $1,600-3,200 for a standard residential underground tank (275-550 gallons). This price generally includes permitting, excavation, tank removal, soil sampling, backfill, and closure documentation. However, costs can increase significantly if the tank is larger (1,000 gallons), located in a difficult-to-access area, or if soil contamination is discovered during the process. Contaminated soil remediation in Colorado adds an average of $12,000-40,000 to the total project cost. Always get at least 3 quotes from licensed CO contractors.
Do I need a permit to remove an oil tank in Colorado?
Yes, Colorado requires permits for oil tank removal, and work cannot legally begin until the permit is issued. Permits are obtained through Colorado Department of Labor and Employment - Division of Oil and Public Safety or your local municipality and typically cost $75-200. The permit process usually takes 5-10 business days, so plan accordingly if you're on a deadline for a home sale. Your licensed contractor should handle the entire permit application process as part of their service. Working without a permit can result in fines, failed property closings, and invalidated soil test results.
How long does the entire oil tank removal process take?
The physical tank removal in Colorado takes 1-2 days, but the complete process from start to finish typically spans 2-4 weeks. Here's the timeline: permit application and approval (5-10 business days), utility marking through 811 (2-3 business days), actual removal day (1 day for most residential tanks), soil lab results (3-5 business days), and closure report preparation (3-5 business days). If contamination is found, add 2-8 weeks for remediation. Homeowners selling property should start the process at least 6 weeks before their planned closing date.
What happens if soil contamination is found during tank removal?
If laboratory analysis reveals petroleum contamination above Colorado's regulatory action levels, additional remediation work is required before the site can be closed. Colorado Department of Labor and Employment - Division of Oil and Public Safety oversees the cleanup process, which typically involves excavating the contaminated soil, transporting it to a licensed treatment facility, collecting confirmation samples to verify the contamination has been adequately addressed, and backfilling with clean material. In Colorado, soil remediation costs range from $12,000-40,000 depending on the volume of impacted soil and depth of contamination. Some homeowner's insurance policies cover remediation costs, and Colorado may have petroleum cleanup fund programs that provide financial assistance.
Can I sell my house with an underground oil tank still buried?
Technically yes, but practically it's extremely difficult in Colorado. Most buyers' lenders will not approve a mortgage on a property with a known underground storage tank, and title companies may refuse to issue title insurance. Even cash buyers will typically demand a significant price reduction — often $15,000-$30,000 or more — to account for the removal cost and contamination risk. In Colorado, property sellers are required to disclose known underground tanks. The smart financial move is to remove the tank before listing, which demonstrates the property is clean and eliminates a major negotiation liability.
What's the difference between tank removal and abandonment in place?
Tank removal involves physically excavating and extracting the tank from the ground, while abandonment in place means the tank is cleaned, filled with inert material (foam, concrete, or sand), and left buried. Removal is the preferred option in Colorado because it allows complete inspection of the tank and surrounding soil, and most buyers and lenders strongly prefer full removal. Abandonment may be considered when the tank is located under a structure (like a porch or addition) that makes excavation impractical or prohibitively expensive. However, not all Colorado municipalities allow abandonment in place, and it may complicate future property sales.
How do I know if I have a buried oil tank on my property?
Common signs include: fill and vent pipes sticking up from the ground (usually near the foundation), an oil smell in the basement without a visible tank, property records showing a history of oil heat, or your home was built between 1940-1985 when underground tanks were standard. The definitive way to confirm is a tank sweep inspection using ground-penetrating radar (GPR) and metal detection, which costs $250-400 in Colorado. Real estate agents in Colorado routinely recommend tank sweeps for any pre-1990 home, as discovering a tank during a buyer's inspection can derail a sale.
Does homeowner's insurance cover oil tank removal costs?
Standard homeowner's insurance policies typically do not cover the cost of routine oil tank removal. However, many policies do provide coverage for sudden and accidental pollution events — meaning if your tank leaks and contaminates the soil, the remediation costs may be partially or fully covered depending on your policy terms. Some insurers in Colorado offer specific oil tank liability riders or pollution liability coverage. Additionally, Colorado may operate a petroleum cleanup fund through Colorado Department of Labor and Employment - Division of Oil and Public Safety that can reimburse eligible homeowners for cleanup costs. Review your policy carefully and consider adding pollution coverage if you have a buried tank.
What size tanks are most commonly found in Colorado?
The most common residential underground oil tanks in Colorado are 275-gallon and 550-gallon steel tanks, though 1,000-gallon tanks are also found, particularly in larger homes and rural properties. Most of these tanks were manufactured from bare steel (no corrosion protection) and installed between 1940 and 1985. Tanks from this era typically have a useful life of 15-25 years, meaning virtually all of them have exceeded their safe service life. Above-ground tanks (usually 275-gallon) are commonly found in basements and are easier and less expensive to remove.
Who is responsible for tank removal — the buyer or seller?
In Colorado, there's no law specifically mandating which party must pay for tank removal in a real estate transaction — it's a negotiable term of the sale. However, in practice, sellers almost always bear the responsibility because buyers' lenders require a clean environmental report before approving financing. If contamination is found, Colorado law generally holds the current property owner liable for cleanup under the 'polluter pays' principle, though prior owners may also share liability. The most common arrangement in Colorado real estate transactions is for the seller to handle removal and provide clean soil results at closing.

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💰 Colorado Cost Summary

Oil Tank Removal$1,600-3,200
Permits$75-200
Tank Sweep$250-400
Remediation (if needed)$12,000-40,000

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Related Services

→ Underground Tank Removal in Colorado→ Tank Sweep Inspection in Colorado→ Soil Remediation in Colorado→ Tank Abandonment in Place in Colorado

Other Oil Tank Services in Colorado

Underground Tank Removal
in Colorado — $1,600-3,200
Tank Sweep Inspection
in Colorado — $1,600-3,200
Soil Remediation
in Colorado — $1,600-3,200
Tank Abandonment in Place
in Colorado — $1,500-3,000
Above Ground Tank Removal
in Colorado — $500-1,500

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