Detroit imports and exports hazardous waste, with multiple companies involved. In 2007, Dynecol, Inc. imported over 1 million tons of solid hazardous waste, making it the largest exporter in the city. U.S. Liquids and Dynecol, Inc. together imported over 3,700 tons of solid waste from Canada. Petro-Chem, Marathon, and U.S. Liquids exported over 660,000 tons that year to Canada. While some believe hazardous waste facilities are located in minority neighborhoods, in Detroit the facilities are located in communities with varying racial demographics.