Not only do they have the contaminated soil to truck off but there are a number of things that still need to be pulled out of the clay. For the W=A project (465 N Park) a large vibrator was brought in to pull the old sheet piles, same trick is used for the wooden piles when they are intact enough.
More of the old slip and turnaround ?
Clusters llike this were capped with concrete and served as the foundation.
And from months past
one of 2 large tanks
Fairly modern re-bar from the "holding tanks"
Old limestone foundation wall.