Beemsterboer faced pressure from the city, state and federal governments after wind blew clouds of petcoke from huge open piles on the Calumet River by the Chicago Skyway Bridge through residential neighborhoods last summer.

http://www.nwitimes.com/business/local/beemsterboer-shuts-down-petcoke-storage-terminal-in-chicago/article_9cc07f97-d18b-5cd4-b54b-afff3c80967b.html