Heritage-Crystal Clean, Inc., through its subsidiary, Heritage-Crystal Clean, LLC, provides parts cleaning, hazardous and non-hazardous waste, and used oil collection services to small and mid-sized customers in the industrial and vehicle maintenance services industries in North America. It operates in two segments, Environmental Services and Oil Business. The Environmental Services segment offers parts cleaning, containerized waste management, vacuum truck, antifreeze recycling, and field services. The Oil Business segment engages in the collection of used oil, the sale of recycled fuel oil, and used oil filter removal and disposal activities, as well as the re-refining of used oil into lubricant base oil and other products. This segment also collects and disposes waste water. As of March 02, 2020, the company operated through 89 branches serving approximately 90,000 customer locations. Heritage-Crystal Clean, Inc. was incorporated in 2007 and is headquartered in Elgin, Illinois.