Before natural gas reached every street, a lot of houses in the Fraser Valley were heated with oil. The oil sat in a steel tank, often buried in the yard beside the house. When the house switched to gas or a heat pump, the furnace came out. The tank very often did not.
Those tanks are still turning up in the older parts of Murrayville, Fort Langley, Brookswood, Ocean Park and White Rock. A buried tank by itself is a manageable problem. A tank that has leaked is a contaminated site, and in B.C. the law can make the current owner responsible for cleaning it up. That is why the time to ask about one is before you remove subjects, not after.
Who pays if a tank has leaked
Contaminated land is governed by Part 4 of the Environmental Management Act. Section 45 lists who is responsible for remediation of a contaminated site, and the first two lines are a current owner or operator of the site and a previous owner or operator. So the buyer who owns the house when the leak is found is on the hook, and so, potentially, is the seller who owned it before.
There is a defence for an innocent buyer, but it is narrower than people assume. Under section 46(1)(d), an owner is not responsible if they can establish all of the following:
- when they bought, they had no knowledge or reason to know or suspect the site was contaminated;
- they undertook all appropriate inquiries into the previous ownership and uses of the site, and other investigations, consistent with good commercial or customary practice at the time, to minimize potential liability;
- if they later sold, they disclosed any known contamination to the buyer first; and
- they did not cause or contribute to the contamination themselves.
Read the second point twice. The defence protects buyers who asked the right questions. A buyer who skipped the obvious checks on an older house with a chimney and no gas line in the yard may struggle to say they had no reason to suspect anything. The burden is on the owner to establish it.
The third point matters to sellers. If you know about contamination and sell without disclosing it, you lose that protection, on top of whatever claim the buyer may have against you.
No provincial rulebook for the tank itself
People expect a provincial permit system for residential oil tanks. There isn't one. The province's own page on fuel tanks says there are currently no specific provincial regulations to govern petroleum storage tanks. It points owners to the Canadian Council of Ministers of the Environment codes of practice, and notes that BC Fire Code requirements apply to fuel storage tanks.
In practice, that means the rules you will actually deal with are municipal. Each city decides whether a removal needs a permit and what goes with the application.
Surrey: a permit, an environmental letter, a title search
Surrey is the clearest of the local municipalities, and it covers South Surrey. You need a Residential Storage Tank Removal Permit to remove an underground storage tank on a residential property. The City's guidance says all tanks that have been out of commission for more than two years, or that have no further use, should be removed.
Surrey's application guide, dated January 2016, lists what goes in:
- a building permit application form;
- a current title search;
- an owner authorization form if the applicant is not the registered owner;
- a letter from an environmental professional confirming they are involved in and supervising the removal, and that the ministry will be notified if any leakage has occurred;
- a site plan to scale showing the tank's approximate location, the removal path, and nearby trees;
- the permit fee, and possibly a damage deposit.
The guide also states that under the BC Fire Code, removing, abandoning in place, or taking a tank out of service must follow good engineering practice, and it names the standards it means. The point for a buyer is simple: in Surrey a proper removal leaves a paper trail. A permit and an environmental professional's letter are what to ask the seller for.
White Rock and the Township of Langley
White Rock publishes its own underground oil storage tank removal process. I was not able to read the current version for this post, so I won't describe it. If you are buying or selling in White Rock proper, call the City's building department and ask for it before you plan any removal.
The Township of Langley's demolition guide does not mention oil tanks. For a removal there, call Permits, Licences and Inspections at 604-533-6018 and ask what they need. Whatever the answer, the environmental side does not change from one city to the next, because the Act applies everywhere in the province.
The provincial site registry
Section 43 of the Act sets up a public site registry, which holds records about the identification, investigation and remediation of contaminated sites. It is worth checking on an older house, with two cautions the province states plainly.
First, how to search. Registered sites are mapped in the Environmental Remediation Sites layer in iMapBC, which anyone can search at no cost. A full Site Details Report is ordered through BC Registries and Online Services for $150 plus a service charge and GST, and opening a BC Registries account can take 3 to 5 business days. Leave time for that inside a subject period.
Second, what a search does not tell you. The province says the existence or absence of information in the registry provides no assurance that a site is or is not contaminated. A leaking home heating tank that nobody has investigated will not be in the registry. A clean registry result is one inquiry, not the answer.
What I would ask for on an older house
If the house was built before gas service reached the street, or shows any sign of an old oil system, I build these into the offer as conditions:
- The seller's written answer on whether there is, or ever was, an oil tank on the property, and whether one was removed.
- If a tank was removed, the municipal permit and the environmental professional's letter or closure report, including any soil sampling.
- A tank sweep by a qualified contractor, which scans the yard for buried metal. It is a small cost against the size of the risk.
- A check of the site registry through iMapBC, with time allowed for a full report if anything shows.
- A call to your home insurer before removing subjects, asking how they treat a property with an existing or removed oil tank.
If a tank is found, the usual path is to negotiate removal by the seller before completion, under permit, with an environmental professional confirming the soil. Removal after you own the house puts both the cost and the contamination risk on you.
If you are selling
Get ahead of it. If you know there was oil heat, find out whether the tank is still there before you list, and if it is, consider removing it under permit first. A clean removal file is the best answer to the first question a careful buyer's agent will ask. And whatever you know, disclose it. Section 46 is clear that an owner who sells without disclosing known contamination loses the protection it offers.
Where this comes up locally
In Langley, older homes in Murrayville, Fort Langley and Brookswood are the ones to ask about. In South Surrey and White Rock, it is the original houses in Ocean Park and on White Rock's older streets. If the house is on a well or septic too, my post on buying a home on a well and septic covers the records to ask for. For how conditions like these fit into an offer, see what happens at subject removal.
If you are looking at an older home, send me the address and I will tell you what to ask for before you write. If you own one and are thinking of selling, start with a home value estimate.
Sources
Environmental Management Act, sections 43, 45 and 46, at bclaws.gov.bc.ca. Province of British Columbia, managing fuel tanks (updated July 28, 2022), and site information and site registry pages at www2.gov.bc.ca. City of Surrey, Residential Storage Tank Removal Permit page, and How to Apply for Removal of an Underground Storage Tank on a Residential Property (January 2016). Township of Langley, Demolition Guide (January 2025). Checked October 31, 2026. Not legal or environmental advice.