Also, just to say if there are any specific shots zoomed in you would like let me know and I am sure I could get them from my vantage point or @Red Mars since he also takes some great shots of the site.
In some of the previous pages in this thread have the dirt going to a few places. The Lower Donlands lake filling is one and one I believe is up north outside the city. You will have to go back maybe to page 80 or earlier to find the exact places other members have said.
As was also previously mentioned, mildly contaminated earth excavated the site went to the GFL soil remediation facility in the Portlands for processing (not for lake filling) while the most severely contaminated soil, from the north-west corner of the site was trucked to Montreal for remediation.