over the decades.
"Instead of removing the mass of toxic waste 50 years ago, the site was covered with clean soil and houses and a school were built on top of it.
Not only was municipal garbage dumped there, but for decades industrial wastes from service stations, manufacturers, and chemical facilities were put there.
In the 1940s and 1950s, the site was routinely sprayed with DDT, but in 1962 some 229,300 cubic metres of excess fill was removed because subsurface toxic fires kept erupting (and got the site known as "Dante's Inferno").
According to the editor of Hazardous Waste magazine, the ASL site -- now under water -- will almost inevitably leach toxic effluent into the floodwaters, with the potential of inflicting unpredictable damage on the coast, and those that live there -- a possible environmental catastrophe. "
http://www.torontosun.com/News/Columnists/Worthington_Peter/2005/09/05/1202432.html