For those interested (and I'm pretty interested because I work right on top of it), here's various info about the Greenpoint Oil Spill. It's upstream of the proposed stadium site, but learning about this gives you an idea of what the cleanup entails.
Wikipedia: "The Greenpoint oil spill is
one of the largest oil spills ever recorded in the United States. Located around
Newtown Creek in the
Greenpoint neighborhood of
Brooklyn,
New York City,
between 17 and 30 million US gallons (64,000 and 114,000 m3) of oil and petroleum products have leaked into the soil from
crude oil processing facilities over a period of several decades."
From Newtown Creek Alliance: "Since 1978, approximately
12.9 million gallons of oil and oil products have been recovered from the soils beneath Greenpoint and the waters of Newtown Creek (as of March 2017)".
So obviously this whole thing is the al-Mubarak family attempting to grab our spilled oil!
Further reading:
https://www.atlasobscura.com/places/the-greenpoint-oil-spill