This case presents the question of whether the injection of hydrocarbon materials, such as chemical by-products, into an iron blast furnace brings these materials within the definitions of “solid waste” and “waste” under regulations of the U.S. Environmental Protection Agency and the State of Ohio implementing the Resource Conservation and Recovery Act (“RCRA”), 42 U.S.C. §§ 6901-91. Between 2005 and 2008, Carbon Injection Systems, LLC supplied liquid hydrocarbon materials, allegedly including chemical by-products, for use in an iron blast furnace in Warren, Ohio.