There could be a steel tank the size of a chest freezer rusting away under the lawn you mow every week. Hundreds of homes across Greater Moncton still have one, and most of the owners have no idea it’s there.
If you’re buying, selling, or just curious about an older home, knowing how to find a buried oil tank can save you a five-figure headache. Underground tanks were common across Southeast New Brunswick from the 1940s through the 1970s. When families switched to above-ground tanks, electric baseboards, or heat pumps, plenty of those old tanks stayed right where they were. Out of sight and out of mind, until an insurance company or a buyer’s lawyer starts asking questions.
This guide covers the warning signs, the checks you can do yourself, what a professional scan costs around Moncton, and what to do if you actually find one.
Why Buried Oil Tanks Keep Turning Up Around Moncton
Oil heat has deep roots in Westmorland, Albert, and Kent counties. For decades it was the default way to keep a house warm through a New Brunswick winter, and in the middle of the last century, burying the tank was considered the tidy option. It freed up basement space, kept the yard looking clean, and nobody worried much about what steel does after fifty years in wet clay soil.
We know better now. Buried steel tanks corrode from the outside in, which means you can’t see the damage getting worse. When one finally lets go, heating oil moves into the soil and groundwater fast, and cleanup gets expensive just as fast. Corroded underground tanks are such a widespread problem that the U.S. EPA runs an entire underground storage tank program dedicated to them, and the same physics applies on this side of the border.
That’s why insurers, lenders, and real estate lawyers in New Brunswick treat an unknown buried tank as a serious red flag. Many insurance companies won’t write or renew a policy until the tank is confirmed gone or properly dealt with.
Already staring at a mystery pipe beside your foundation? You don’t have to figure this out alone. Snap a couple of photos and call Hub City Tank Co at (506) 806-0900. We’ll tell you straight whether it’s worth a scan, and our written estimates are always free.
8 Signs a Property Has a Buried Oil Tank
No single clue proves anything on its own. But when two or three of these show up together, take it seriously.
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A capped pipe sticking out of the ground. Fill and vent pipes are usually one to two inches wide, made of steel, and sit within a metre or two of the foundation. Look behind shrubs, under decks, and along the driveway side of the house where the delivery truck would’ve parked.
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Copper lines through the foundation wall below grade. Oil lines from an outdoor buried tank enter the basement low on the wall. Even if the lines are gone, the patched holes often aren’t.
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Patches in the basement floor or walls. Concrete scars near the furnace area can mark where old oil lines or a tank pit used to be.
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An oil-heat history with no visible tank. If the house has a chimney thimble, an old oil furnace, or oil stains in the mechanical room but no tank anywhere on the property, ask where the oil used to come from.
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A dip or mound in the lawn. Soil settles over a buried tank as it corrodes, and it also settles over a hole that was backfilled after a sloppy removal. Either way, that low spot is telling you something.
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Dead grass, stained soil, or a petroleum smell. A patch of lawn that won’t grow, an oily sheen in puddles after rain, or a diesel-like smell near the foundation can point to a tank that’s already leaking.
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Old fuel company stickers and delivery records. Check the furnace, electrical panel, and basement door frames for delivery stickers. Past fuel bills or service tags are a paper trail worth following.
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The age of the house. Homes built before about 1975 that heated with oil are the prime candidates. Newer builds almost never have underground tanks.
How to Find a Buried Oil Tank: A Step-by-Step Check
Here’s the order we’d suggest for checking a property yourself before spending a dime.
Step 1: Walk the perimeter. Circle the house slowly and look for pipes, caps, or threaded fittings poking out of the soil near the foundation. Pay extra attention to the side facing the street or driveway, and don’t skip the awkward spots under decks and behind hedges.
Step 2: Head to the basement. Check the walls near the furnace for capped copper lines, patched penetrations low on the wall, or an old fuel filter bracket with nothing attached to it.
Step 3: Pull the paper trail. Ask the seller or previous owner directly. Call local fuel suppliers to ask if the address has a delivery history. Check with the City of Moncton, Dieppe, or Riverview, or your local service district, for any old permits tied to tank installation or removal.
Step 4: Ask the neighbours. Houses built in the same era on the same street often got the same setup. A long-time neighbour who remembers oil trucks filling a pipe in the yard is better evidence than any gadget.
Step 5: Resist the urge to dig or probe. Pushing a steel rod into the ground blindly can puncture a corroded tank or hit a gas, power, or water line. Always request utility locates before any digging, and honestly, this is the point where DIY should stop.
Step 6: Book a professional scan. A trained technician with a magnetometer or metal detection gear can sweep a typical yard in under an hour and confirm whether a tank is present, roughly how big it is, and how deep it sits. You get a written result you can hand to your insurer or lawyer.
One more thing. If at any point you smell oil, see a sheen on standing water, or find soil that’s wet and smells like diesel, stop everything. A suspected leak is an emergency, not a weekend project. Our emergency oil tank service in Moncton line answers 24/7 for exactly this situation.
What a Buried Oil Tank Scan and Removal Costs in Southeast NB
Here’s what homeowners around Greater Moncton can typically expect to pay. Every property is different, so treat these as honest ballparks, not quotes.
| Service | Typical cost (CAD) | What you get |
|---|---|---|
| Visual site assessment | Free to $150 | Walkthrough of the yard and basement, photo review |
| Magnetometer or metal scan | $250 to $600 | Confirmation of tank presence, location, and depth |
| Tank locate plus soil sampling | $700 to $1,500 | Scan plus lab-tested soil samples near the tank |
| Buried tank removal, no leak | $3,000 to $7,000 | Excavation, tank disposal, clean backfill, paperwork |
| Removal with contaminated soil | $10,000 to $100,000+ | Excavation plus soil remediation and reporting |
| Abandonment in place, where allowed | $2,000 to $4,500 | Tank pumped, cleaned, and filled with inert material |
The spread on that removal line is exactly why finding a tank early matters. A sound tank that comes out with clean soil is a one-day job. A tank that’s been leaking for ten years is a different story entirely. We break the numbers down further in our guide to buried oil tank removal cost.
Here’s how it played out for Marc in Riverview. He bought a 1966 side-split last spring, and the home inspection missed the capped pipe behind an overgrown cedar hedge. His insurance company didn’t miss it. They gave him 30 days to confirm whether a tank was still in the ground. A $400 scan found a 910 litre steel tank about four feet down. Removal ran $4,600, the soil tested clean, and his insurer renewed without another word. Total damage: about $5,000, and a fraction of what he’d have paid if that tank had been left to fail.
Found a Buried Oil Tank? Here’s What to Do Next
First, don’t panic. Finding a tank doesn’t mean it’s leaking. Plenty of buried tanks come out of the ground intact. But don’t ignore it either, because the risk only grows the longer it sits.
Your realistic options come down to two:
Removal. The tank is pumped out, excavated, and hauled away, and the soil underneath gets checked. This is what most insurers, lenders, and buyers’ lawyers want to see, because it comes with proof the problem is gone. Our buried oil tank removal service in Moncton handles the excavation, disposal, and documentation in one job.
Abandonment in place. The tank is pumped, cleaned, and filled with an inert material like sand or foam, then left in the ground. This is generally reserved for tanks sitting under additions, garages, or anywhere digging would damage the structure. It’s cheaper up front, but some insurers still aren’t satisfied by it. We cover the trade-offs in our post on abandoning an oil tank in place.
Whichever way you lean, get the soil tested. And if a leak is found at any point, New Brunswick rules require that spills be reported to the province. The Department of Environment and Local Government oversees petroleum contamination, and getting ahead of the reporting is always better than getting caught behind it.
Diane learned the value of moving quickly when she was selling her late mother’s cottage near Shediac. The buyer’s lawyer spotted a vent pipe in an old listing photo and made the sale conditional on dealing with it. The scan, removal, and soil testing came to $6,100, and the closing slipped by two weeks, but the deal survived. Her agent figured the same tank, discovered by the buyers after closing, could’ve turned into a lawsuit instead of a line item.
Ready for a straight answer on your own property? Request a free written estimate and we’ll lay out your options with real numbers, no pressure.
Buying or Selling? Deal With the Tank Before It Deals With You
If you’re buying an oil-heated home built before 1980, make a tank scan a condition of your offer. It costs a few hundred dollars and protects you from inheriting an unknown liability, because once the deed transfers, the tank and anything leaking out of it belong to you. There’s more on this in our guide to buying a house with an oil tank.
If you’re selling, get ahead of it. Scan before you list, remove the tank if one turns up, and keep every scrap of paperwork. A seller who hands over a scan report and removal documents looks organized and trustworthy. A seller who shrugs at a mystery pipe watches offers shrink.
And if you’re staying put with oil heat, deal with the old buried tank and put a modern above-ground tank in its place. Our oil tank replacement service in Moncton can often handle both in the same visit, so you’re only tearing up the schedule once.
The cost of waiting is real. Paul in Memramcook knew about the pipe in his side yard for years and figured the old tank had been emptied decades ago. It hadn’t. When the shell finally failed, oil tracked along his foundation drain, and the remediation bill passed $38,000. His insurance covered only part of it. The scan that would’ve caught it early costs less than a winter fill-up.
Hub City Tank Co is licensed and insured, our estimates are free and in writing, and we serve Moncton, Dieppe, Riverview, Shediac, Salisbury, Memramcook, Sackville, and the rest of Westmorland, Albert, and Kent counties. Call (506) 806-0900 and let’s find out what’s under that lawn before it costs you real money.
Frequently Asked Questions
How much does it cost to find a buried oil tank?
A professional scan in Greater Moncton typically runs $250 to $600, and a basic visual assessment is sometimes free. Adding lab-tested soil samples usually brings the total to somewhere between $700 and $1,500. Compared to the cost of an undiscovered leak, it’s some of the cheapest insurance a homeowner can buy.
Can I just leave a buried oil tank in the ground?
Sometimes, but it’s rarely the best move. Abandonment in place, where the tank is pumped, cleaned, and filled with inert material, is normally reserved for tanks that can’t be excavated without damaging a structure. Most insurers and buyers’ lawyers prefer full removal with clean soil results, so get professional advice before you choose.
Who is responsible for a buried oil tank when a house is sold?
In practice, the current owner owns the problem, which is why buyers should make a scan a condition of sale. Once you take title, the tank and any contamination that comes from it are yours to deal with. Sellers who knew about a tank and stayed quiet can face legal trouble later, so talk to your lawyer about disclosure.
How deep are buried oil tanks usually?
Most residential tanks sit two to five feet below grade, close to the foundation on the side the delivery truck could reach. The fill and vent pipes usually sit directly above or very near the tank itself. That’s shallow enough for a magnetometer scan to locate them reliably in a single visit.