Heritage-Crystal Clean, Inc. provides industrial and hazardous waste services to small and mid-sized customers in the United States. Its services comprise parts cleaning, containerized waste management, used oil collection and re-refining, and vacuum truck services. The company provides its parts cleaning services by offering parts cleaning equipment and chemicals to remove oil and grease, and other contaminants from engine parts and machine parts requiring cleaning. It also offers containerized waste management services by collecting drums, pails, boxes, and other containers of hazardous and non-hazardous waste materials from its customers. The company provides its vacuum truck services for the removal of mixtures of oil, water, and sediment from wastewater pretreatment devices. In addition, Heritage-Crystal Clean, Inc. provides bulk used oil collection services; and customer visit and accumulated oil removal services. As of December 31, 2011, the company operated 94 used oil collection trucks. Its customers include businesses involved in vehicle maintenance operations, such as car dealerships, automotive repair shops, and trucking firms, as well as small manufacturers comprising metal product fabricators and printers. The company operates a network of 67 branch facilities. Heritage-Crystal Clean, Inc. was incorporated in 2007 and is headquartered in Elgin, Illinois.