Mayor Dave Bing has issued a deadline for the removal of all petroleum coke from the Detroit riverfront on the city's southwest side.
Bing's office says Detroit Bulk Storage was notified Tuesday to move the material by Aug. 27.
The city says the company failed to cart away all the petroleum coke by an Aug. 9 deadline listed last week in an order from Detroit's Buildings, Safety Engineering and Environmental Department.
The black, rock-like substance is produced by the petroleum industry and is used as a fuel. It was being stored in piles along the river.
Freighters have been taking the piles to Ohio.
The company has been cited for being in violation of city code and ordered to place a tarp on the material remaining at the site.
Detroit Bulk Storage spokesman Daniel Cherrin released this statement on Tuesday:
Detroit Bulk Storage has been consistently working with the City and the State in resolving issues concerning the storage of petroleum coke, and we have been working to eliminate the existing inventory. While we have been diligently working to find vessels to ship out the product, there are a limited number of ships available on the Great Lakes. For example, we had a ship in this past Friday to held reduce the existing inventory. Again, we are working hard at eliminating the inventory and working to resolve the concerns the city has.