Heritage-Crystal Clean, Inc. engages in the provision of parts cleaning and waste management services to the manufacturing and vehicle service sectors. It operates through the Environmental Services, and Oil Business segments. The Environmental Services segment includes parts cleaning, containerized waste management, vacuum truck services, antifreeze recycling activities, and field services. The Oil Business segment consists of used oil collection, recycled fuel oil sales, used oil re-refining activities, and used oil filter removal and disposal services. The company was founded by Joseph Chalhoub in 1999 and is headquartered in Hoffman Estates, IL.