Quote: some of the water in that hole was ADDED by the process of opening it up also , they showed pics of them sawing the cover into sections correct ? concrete cutting involves spraying water on the blade to cool it and as a lubricant ...
True, but I don't think it would cause the fin section that is shown to be open to look the same color as the plastic on the outside.
Or the waterlines on the wall all the way to the top.
no i'm not saying that the water was only from the cutting operation , but i'll bet some of that SHEEN on top of the water was also created by the lube they used to cut the concrete , but oil back then was in cardboard containers so i'm guessing that those disintergrated after X amount of water cycles .
