
A leaking home fuel oil tank can be a serious issue, potentially leading to soil and water contamination, pollution, fire hazards, and even dramatic increases in fuel bills if left untreated. The first step in repairing a leaking home fuel oil tank is to identify the leak and determine its severity. This involves inspecting the tank for any signs of damage, such as dents, scratches, cracks, or rust, as well as assessing how far the leaked oil has spread. Once the leak is located, there are several temporary fixes that can be done to stop the leak, such as using bar soap or a sheet metal screw to plug the hole. However, it is important to contact a professional as soon as possible to properly assess and repair the damage, as well as to determine if the oil has contaminated the surrounding soil or water.
| Characteristics | Values |
|---|---|
| Prevention | Schedule regular maintenance, at least yearly |
| How to detect a leak | Odour, oil sheen in water, increase in heating bill, dying plants, stained lawn, visual identification of leak |
| First steps | Ventilate the area, close off the area to the leak, protect your family, contact professionals |
| Temporary fixes | Use bar soap to plug holes, put a bucket or catch basin under the tank to catch drips, use sand to absorb oil |
| Permanent fixes | Contact professionals to repair or replace the tank, contact your insurance company |
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What You'll Learn

Identify the leak and its severity
Identifying the source and severity of a fuel oil tank leak is crucial for determining the appropriate course of action. Here are some steps to help you identify the leak and assess its severity:
Locate the Leak
- Odour: A strong pungent odour is often the first indication of an oil leak. Even a small amount of fuel oil can emit a noticeable smell. If you detect a strong oil odour indoors or outdoors near your tank, conduct a visual inspection for signs of leakage on the floor or ground.
- Visual Inspection: Look for visible signs of oil leakage, such as oil stains on the floor, ground, or the tank itself. Check for puddles of oil forming underneath the tank.
- Water Contamination: Check for signs of oil in your water, such as an oily sheen on the surface.
- Increased Heating Bills: Monitor your heating bills and fuel delivery durations. A leaking tank may cause fuel to last shorter than usual, resulting in more frequent refills.
- Dying Plants: Observe the vegetation around the oil tank. Dying plants or stained patches of lawn near the tank may indicate oil leakage.
Assess the Severity
- Size of the Leak: Determine the size of the leak, whether it is a small pinhole leak or a larger puncture.
- Spread of Oil: Assess how far the leaked oil has spread. Check if it has permeated the soil or contaminated nearby water sources. Take soil samples to analyse the extent of oil penetration.
- Environmental Impact: Consider the potential environmental impact of the leak. Depending on the size and duration of the leak, there may be risks of soil and water contamination, leading to dramatic pollution problems.
- Health Risks: If the leak is substantial, there may be possible health risks associated with exposure to oil vapours, including headaches, dizziness, loss of coordination, euphoria, nausea, and disorientation. These risks may be more severe with prolonged exposure.
Remember, it is recommended to involve professionals in diagnosing and addressing oil tank leaks. They can provide expert assessments and ensure the safe and effective remediation of the issue.
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Ventilate the area and limit access to the leak
If you smell oil or notice an oil puddle on the floor beneath your tank, you may have an oil leak. Oil is combustible, so you must contact your local fire department immediately. If your oil tank is leaking, ventilate the area by opening windows and setting up fans to blow any odors outdoors. If the leak is inside your home, you should also consider moving your family to a hotel or relative's home until the leak has been fixed, as exposure to oil vapors can cause health issues such as headaches, dizziness, nausea, and disorientation.
If the leak is outside, you should still prevent anyone from accessing the leak before fire officials arrive. If the leak is from an outdoor tank, it may be contaminating your neighbor's water supply. If you have a sump pump, check the water in the pump regularly for signs of oil contamination. Oil will always flow to the top of the water since it is less dense.
If possible, put something under the tank to catch the oil, such as a bucket, a kiddie pool, or cat litter. You can also call the oil company and have them pump out the oil. However, do not attempt to repair the tank yourself. Contact a professional cleaning service or a contractor who knows how to clean up the spill area and repair or replace the tank.
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Protect your family and neighbours
Protecting your family and neighbours is paramount when dealing with a leaking home fuel oil tank. Oil leaks can cause serious damage to your property and belongings and even your neighbours' property. There are also potential health risks to your family and neighbours, including headaches, dizziness, loss of coordination, euphoria, nausea, and disorientation. If there are young children, elderly people, or medically compromised individuals in your household, it is advisable to temporarily relocate to a relative's home or a hotel while the cleanup is in progress.
To safeguard your family and neighbours, it is crucial to act promptly and take the necessary steps to address the leak. Notify your insurance company, as your homeowner's insurance policy may cover the cleanup costs. Contact a professional cleaning service and an environmental consultant, if necessary, to assess the extent of contamination and devise an appropriate cleanup strategy.
In the meantime, there are some temporary measures you can take to contain the leak. Ventilate the area by opening windows and using fans to blow the odours outdoors. Close off the area to prevent anyone from coming near the leak until fire officials arrive. If possible, put something under the tank to catch the leaking oil, such as a bucket, a kiddie pool, or cat litter to absorb the spill.
Additionally, regular maintenance of your heating oil system is essential to prevent leaks from occurring in the first place. Schedule yearly inspections and maintenance checks to ensure your system is in proper working order, reducing the risk of oil spills and protecting your family and neighbours from potential harm.
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Contact the relevant authorities and professionals
If you suspect that your oil tank is leaking, there are several authorities and professionals you should contact to address the issue. Here is a step-by-step guide to help you navigate the process:
- Notify your local health department or DNR office: Contact your local health department or Department of Natural Resources (DNR) office. They can provide you with a list of professional cleaning services and environmental consultants in your area. Environmental consultants are crucial in assessing soil and groundwater contamination and developing an appropriate cleanup strategy.
- Contact a professional cleaning service: Oil spills require specialised cleaning to prevent further contamination and ensure the safety of your family and home. Professional cleaning services have the necessary equipment and expertise to handle the cleanup process effectively.
- Reach out to an environmental consultant: If the fuel oil has escaped the confines of your home, an environmental consultant is essential. They will collect soil and groundwater samples to assess the extent of contamination and provide guidance on the best cleanup approach.
- Call your oil delivery company: If an oil delivery company was involved, it is crucial to notify them immediately. They should be made aware of the spill and may have specific protocols to follow in such situations.
- Engage a contractor: Contact a reputable contractor with experience in oil tank removal and spill remediation. They will remove the tank, verify the spill, and report it to the state authorities, who will then assign a case number. The contractor will also determine if the leak has affected the water table, which is crucial for insurance purposes.
- Contact your insurance company: Get in touch with your insurance provider as soon as possible. Depending on the extent of the leak and whether it has impacted the water table, your homeowner's insurance policy may cover some or all of the remediation and cleanup costs.
- Seek legal advice: Depending on the complexity of the situation and any potential disputes, consider seeking legal advice to understand your rights and responsibilities as a homeowner.
- Preventative maintenance: While this may not be immediately applicable after a leak, it is essential to schedule regular maintenance of your oil tank and furnace to prevent future leaks. Proper maintenance can help you avoid the frustrations, expenses, and health risks associated with oil tank leaks.
Remember, it is important to act quickly and seek professional help when dealing with an oil tank leak. These steps will help you navigate the process effectively and ensure the safety of your family and the environment.
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Repair or replace the tank
If your oil tank is leaking, you must act fast to prevent further damage and save money. The first step is to ventilate the area by opening windows and using fans to blow any odours outdoors. It is also important to close off the area to the leak and not let anyone near it until fire officials arrive. If there is a large leak, there are possible health risks associated with exposure to oil vapours, including headaches, dizziness, loss of coordination, euphoria, nausea and disorientation. As such, it is recommended that you consider moving your family to a relative's home or a hotel while the cleanup is taking place.
The next step is to contact an oil cleanup contractor. This job is not a DIY activity. Professionals will know how to clean up the spill area, repair the tank or advise on a replacement. If your tank is buried, it is impossible to repair small leaks, and it must be removed by a contractor. They will then verify the oil spill and report it to the state authorities. The state will then assign it a case number. It is also important to determine the extent of the oil leak and whether any fuel has entered the water table. This is done through soil analysis and samples.
If your tank is located above ground, it may be possible to repair it. As a temporary fix, you can put something under the tank to catch the oil, such as a bucket or a kiddie pool. You can also try to slow or stop the leak by using a sheet metal screw in the hole. However, this may not work and could make the hole bigger, so it is best to get the tank repaired or replaced as soon as possible.
When deciding whether to repair or replace your tank, consider its age and whether your consumption habits have changed. Many people who remove older underground tanks replace them with indoor tanks. It is recommended that you replace your oil tank every 10 to 20 years, depending on your warranty.
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Frequently asked questions
A strong oil smell is a tell-tale sign of a leaking oil tank. Other signs include an oil sheen in your water, a significant increase in your heating bill, plants dying near the oil tank, stained patches of lawn on your property, and of course, being able to visually identify oil leaking from the tank or a puddle underneath it.
First, ventilate the area by opening windows and setting up fans to blow any odours outdoors. Close off the area to the leak and protect your family by keeping them away from the leak. If the leak is large, there are possible health risks from exposure to oil vapours, including headaches, dizziness, loss of coordination, euphoria, nausea and disorientation. Consider moving your family to a relative’s home or a hotel while the cleanup is taking place. Contact a professional oil cleanup contractor to repair or replace your furnace.
If the leak is coming from a pinhole, you can try using a sheet metal screw to plug the hole. You can also put something like a bucket or a kiddie pool under the tank to catch the oil.
Contact a contractor to remove the tank and report the leak to the authorities. Determine the extent of the oil leak, including whether any fuel has permeated the soil or water table. Contact your insurance company, as your homeowner’s insurance policy may cover the cost of the cleanup.
Schedule regular maintenance at least once a year, and before any season that will require you to heat your home. Regular maintenance will help to prevent leaks and keep your furnace operating efficiently.











































