DETROIT (WWJ/AP) - Tests by the Michigan Department of Environmental Quality have found that hulking black mounds along the banks of the Detroit River in southwest Detroit don’t pose a threat to human health.
The petroleum coke, or pet coke, mounds are a byproduct of oil refining used in energy production. The material has been brought by trucks from the nearby Marathon Petroleum Co. refinery. The pet coke is stored at a site off Jefferson Avenue in southwest Detroit, where it’s loaded onto freighters.
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