First, Imperial Oil set fire to a field on her family’s farm, igniting a layer of peat that caused the ground to cave in. Next, a pipeline ruptured, spilling oil into the slough that had formed after the sinkhole was flooded by rain and snow. Then, the company filled in the five-acre swamp with pieces of concrete drilling pads covered with sludge, timbers stained with hydrocarbons, and other waste materials.

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