A patch of dead grass or dying plants over a buried tank area can be a warning sign — but not the only explanation. How to tell the difference and what to do next.
Get Free QuotesHomeowners sometimes notice a patch of grass or shrubs that dies off in one spot — often roughly where a buried tank sits — while the rest of the yard stays healthy. Heating oil in the soil can damage roots and kill vegetation, so a sharply defined dead area over a known or suspected tank location is worth taking seriously, especially if it appears without an obvious cause and does not recover with watering.
That said, dead grass has plenty of innocent explanations: drought stress, fertilizer or herbicide burn, pet damage, grubs, shallow soil over a driveway edge or buried rock, and even a hot, dry summer. A dead patch on its own does not prove a tank leaked. What makes it suspicious is the combination — a defined patch, in the area where a tank is known or suspected to be, sometimes along with an oil smell, staining, or a fill pipe nearby.
If you know a tank is buried there, or a sweep or old paperwork suggests one might be, treat the patch as a reason to get the tank checked rather than a diagnosis on its own. A local pro can advise whether soil sampling at removal or closure time is warranted, and testing — not the state of the lawn — is what actually determines whether oil reached the soil. If you do not know whether a tank exists, a tank sweep can answer that question first, typically for about $250–$500, before you commit to any bigger job.
Either way, do not dig in the area yourself to look for the tank. Buried lines, the tank itself, and other utilities can sit close to the surface, and disturbing a tank can make a small problem worse.
If any of this sounds familiar, the next step is usually a conversation with a local pro — not a guess. Pros who handle this work every day can check the tank, run a sweep if a buried tank is suspected, and quote removal or closure with the paperwork a sale or lender will want to see.