GEOG 2EI3 Lecture : Lecture 2- January 6th.docx
2 May 2012
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Example of where science based method did not work really well: the sydney tar ponds. Was the most contaminated site in canada. Hamilton now has the most contaminated site in canada- hamilton harbour (randle. Tar ponds are deposits of coal and iron ore due to coal mining and steel production: coal tar= byproduct of making steel. Coke ovens: coal was being baked at high temperatures to produce higher quality fuel source- these sites are contaminated. Cleanup cost of such sites varied from 30 million -> 40 million-> 400 million! This estuary that was later known as the tar pond was divided by a causeway or bridge divide into the north and south tar pond: two ponds contained sediments contaminated with pah and pcbs (polychlorinated biphenyls) Can dig it up and move it somewhere (ie. landfill) Can cap it with cement or clay. Buries it in place, rather than lifting it up and depositing it into a landfill.
