I’m thinking this looks more like a water well connection but wanted to double-check with you all. Buried oil tanks usually don’t have conductors running to them like this do they? Original house was 1917 but it had a couple of add-ons…no disclosure was available.Thanks.
Also, the back area of the house where the pipes were located was covered by a large enclosed deck. So I wasn’t able to see if there was a fill or vent pipe nearby.