What environmental checks do I need before buying a business?

Environmental liability is unusual among diligence risks because it can attach to land itself, sometimes regardless of who caused the contamination or when. That makes it worth checking deliberately, rather than assuming a clean-looking site is a clean site.

When the risk is real enough to check

• Any business involving fuel or chemical storage, including current or former underground tanks
• Auto repair, dry cleaning, printing, manufacturing or industrial processing
• A site with a long or unclear history of prior uses
• Any purchase that includes the real property itself, not just a leased space

What a Phase I assessment actually does

A Phase I environmental site assessment is a records and site review — historical land use, regulatory records, a physical walkthrough — looking for evidence of past or present contamination risk. It does not itself involve soil or groundwater testing; where it flags a concern, a further Phase II assessment involving actual sampling is the next step, not an optional extra.

Asset purchase versus share purchase

How environmental liability follows the transaction differs depending on whether you are buying the shares of the corporation or specific assets, because in a share purchase you generally step into the corporation’s existing liabilities, historical ones included. This is one of the clearer reasons deal structure gets decided early rather than as an afterthought once other terms are agreed.

What to do with what you find

A flagged concern does not automatically mean walking away — it means understanding the scope, who is responsible for remediation, and how that risk is allocated in the purchase agreement, whether through price, an indemnity, or a condition to closing. Treat an environmental finding as a negotiating input, not a verdict, and get it in front of your advisors before deciding what it means for your deal.