Clean, undisturbed layers for most of the yard.
Then, right where the well used to sit, everything changed.
"There," Ray said, tapping the screen. "See that hyperbola shape? That's a point reflector. That's not soil. That's an object."
"How big?"
"Hard to say exact dimensions off one pass, but that reflection runs consistent for about 11 feet. Whatever's down there has edges, corners maybe. Could be a tank. Could be a buried structure nobody ever logged."
"How deep?"
He checked the scale on the screen.
"Six, maybe seven feet."
My pulse picked up.
"The well went down 40 feet. This isn't anywhere near that."
"Which tells me it's not part of the well," Ray said. "It's something separate that happens to sit right where your well used to vent pressure."
He looked up at me, and for the first time all afternoon, his easy contractor's calm slipped.
"You said the road's cracking that direction, about 40 feet northeast?"
He traced a line with his finger from the anomaly toward where the road sat off past the edge of the survey area.
"I'd want a second pass on the road shoulder before I say anything for certain, but here's what I'm thinking. Whatever your well was doing for 60 years, it might have been sitting on top of a natural pressure-relief point for whatever's buried down there. You plug the vent, the pressure's got to go somewhere. Looks like it found the path of least resistance toward your road."
"And the heat?"
"Vapor migration, maybe. Or displaced groundwater finding a new route to the surface. I do radar, not chemistry. But I'll tell you straight, I've run a few hundred of these, mostly utility locates, and I don't love what I'm looking at. Nobody buries something this deep and this undocumented unless they had a reason to hide it."
I stood in my own backyard and understood, with a clarity that settled cold in my chest, that this had never been about a well at all.
I didn't sleep that night.
I sat at my kitchen table with Ray's printouts spread out in front of me and pulled every historical record I could find on the property.
Old plat maps, county GIS layers, aerial photographs going back as far as the archive went.
The subdivision had been built in 2003.
Before that, the land had been part of a much larger parcel, 340 acres according to a 1987 county assessment, owned by a company called Halverson Agricultural Holdings.
The deeper I dug, the more one detail stood out.
Halverson Agricultural Holdings had operated something called a materials reclamation site on a back corner of the property from 1974 to 1981, according to a single water-quality permit application scanned into the county's digital archive.
The kind of document that had clearly been uploaded during some long-forgotten digitization effort and never looked at again.
I zoomed in on the hand-drawn site map attached to that 1978 permit.