Context did the same thing at Market Wharf, capping the site and building up instead of down. Urban Capital went up for River City 1, 2, and 3 as well, partly to cap the contaminates and partly to not breach the flood wall, and It has happened at some other projects as well. The City sees it as a safe way to deal with the contaminated soil (which otherwise might contaminate nearby areas during excavation through airborne particulate and vapours. Seems to be a safe way to deal with the issue. You just have to find somewhere else to safely store the excavate if you remove it, anyway, likely meaning capping it somewhere else.I had no idea about this. That's yet another reason why I wouldn't ever live at that development; if Pemberton is too cheap to excavate all the contamination than i'd want no business in living in their cheap build.
And if developers in general are going to be cheap by going the membrane way (which will degrade over time) on contaminated sites instead of doing full-scale excavations, then i'll have no business with those select developers either.