[fghorow]

I've heard some stories about abandoned PA wells too. One version claimed that tens (hundreds?) of thousands were from the late 1800s to early 1900s, with old records lost. That means people do NOT know where they are. That always struck me as an opportunity for some enterprising remote sensing co. (even one formed by HN readers, hint hint!) to step into the breach and find them. You can't remediate it, if you don't know where it is.