Selling a Gas Station in Burlington With Old Tanks in the Ground

The situation

Alejandro had run an independent gas station in Burlington for close to thirty years. He owned the business outright — the fuel supply contracts, the convenience store inventory, the equipment, and a long-term lease on the land the pumps sat on — and after three decades of early mornings, he was ready to retire. A buyer came along quickly: Hua, a transit operator, and Kasia, an administrative assistant, had been saving for years to own something of their own, and a going-concern fuel station with a loyal customer base looked like the right first step. They agreed on a purchase price in the mid-$400,000s for the business, financed partly through their savings and partly through a loan secured against the business assets.

Our team was retained by Alejandro to draft the purchase and sale agreement and guide the transaction through to closing. Deals like this usually move in a fairly predictable sequence: agreement on price and structure, a due diligence period where the buyer's advisors examine the business, then closing. For the first few weeks, that is exactly how it went. Alejandro provided his corporate and financial records, the fuel supply agreement was confirmed as assignable to the new owners, and the store's inventory and equipment were listed and valued without incident. Everyone involved expected a routine handover.

What the environmental review found

Because the business involved fuel storage and dispensing, Hua and Kasia's lender required an environmental site assessment before it would finalize financing — a standard condition for any transaction involving underground storage tanks. The buyers hired an environmental consultant to complete a Phase I assessment, a desktop and site review that looks at historical land use, past ownership, and visible signs of contamination. The Phase I review turned up something that changed the shape of the deal: municipal records showed the property had operated as a fuel station since the 1970s, under at least two prior owners before Alejandro purchased the business, and older tank removal records from the 1990s were incomplete.

That result triggered a Phase II assessment — physical soil and groundwater testing at specific points on the site. The Phase II report came back with elevated petroleum hydrocarbon readings in soil near one corner of the property, consistent with a slow historic leak rather than anything recent. The environmental consultant's preliminary estimate for remediation, if a regulator required full cleanup, ranged from about $60,000 to $120,000 depending on how far the contamination extended.

This is the moment many small business sales in Ontario derail. Contamination discovered during due diligence puts a buyer's lender on edge, because the Environmental Protection Act imposes cleanup responsibility on people connected to a contaminated site — including, in some circumstances, a current owner who did not cause the contamination. Hua and Kasia's lender would not fund the purchase without a plan for who would bear that risk. Alejandro, for his part, had operated the station carefully throughout his ownership and had no reason to believe the leak originated on his watch — the tank records suggested it predated his purchase by years. Both sides had a legitimate position, and neither wanted the deal to collapse over a problem neither of them had created.

What we did

1. Reframed the problem as an allocation question, not a deal-breaker. The contamination was real, but its cost was estimable within a range. Once a problem has a dollar range attached to it, it can usually be shared or shifted contractually rather than treated as a reason to walk away. We advised Alejandro that trying to hide or minimize the finding would only invite a bigger dispute later — the honest path was also the fastest one.
2. Negotiated an environmental indemnity into the purchase agreement. An indemnity is a promise by one party to compensate the other for a specific defined loss. We drafted a clause under which Alejandro agreed to indemnify Hua and Kasia for remediation costs connected to contamination that existed before closing, up to a negotiated ceiling, with a clear process for how a claim would be substantiated using further environmental testing if the issue resurfaced.
3. Built in a holdback instead of relying on a bare promise. A promise to pay later is only as good as the payer's ability to pay when the bill arrives. Rather than leave the buyers dependent on Alejandro's future solvency, we structured an escrow holdback: roughly $100,000 of the purchase price was withheld at closing and held by an independent third party for a fixed period, to be released to Alejandro if no claim was made, or paid out to cover a substantiated remediation cost if one was.
4. Set clear terms for triggering and quantifying a claim. Vague indemnities generate disputes about what counts as proof. We specified that a claim required a report from a qualified environmental professional documenting the scope and cost of required remediation, and set a defined window after closing during which a claim could be made — long enough to cover a realistic monitoring period, short enough that the holdback would not sit in limbo indefinitely.
5. Coordinated with the buyers' lender directly. The lender's condition was the real deadline driving the negotiation. We worked with Hua and Kasia's lawyer to confirm the indemnity and holdback structure satisfied the lender's underwriting concerns, so financing could be finalized without further delay once the environmental terms were settled.

The outcome

The deal closed roughly six weeks after the Phase II results came in — later than originally planned, but well within a range both sides could live with once the structure was in place. Alejandro retired with the bulk of his sale proceeds in hand and a clear, time-limited exposure on the balance held in escrow. Hua and Kasia took over the station with financing secured and a contractual backstop if the contamination turned out to be more extensive than the initial testing suggested. The consultant's post-closing monitoring plan gave both sides a shared, objective way to track the problem going forward, rather than leaving it to guesswork or dispute later.

About eight months after closing, routine groundwater monitoring required by the local environmental authority showed the plume had migrated slightly further than the original estimate, and the environmental consultant recommended additional excavation. The cost came in at approximately $75,000 — squarely within the range the parties had anticipated and well under the holdback amount. Hua and Kasia submitted the claim with the consultant's supporting report, exactly as the agreement contemplated, and the funds were released from escrow to cover the work. The remaining holdback balance, once the claim window closed, was paid out to Alejandro as agreed.

No one was surprised, and no one ended up in a dispute over money that had already been accounted for. That is the quiet measure of success in a deal like this: the hard conversation happened before closing, not after, and the eventual bill was paid from money that had been set aside for exactly that purpose rather than fought over after the fact.

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