Still not sure what is, but I opened it. It was 20" Deep, 8 1/2" in diameter, and the bolt heads were 15/16". It was full of old nasty water. I pailed it out and found no pipe entering or exiting the cylinder. Any idea's?
Any idea what was at the bottom of the 20"? Stone? Concrete? Common practice years ago, legal or not, was to simply fill in underground tanks & such that were abandoned. I work as an estimator for a site contractor in NY & it's accepted to fill in a sanitary sewer or storm drainage pipe with concrete.