The onsite tanks for oil and production water. The pipes to them. We’re talking about completion, not plug and abandon.
Toss in some alcohol from a business failure and the spigots may just be opened to the world and left to flow a few hundred bpd onto the ground, both production water and oil.
That would be a cleanup effort for NoDak.
I’ve seen a lot of wellheads shut down, never ever saw one where anyone ran anything out on the ground. Why would they?
The tanks and piping are sold off for reuse, or even for scrap. Why would anything be left laying around?