Heritage-Crystal Clean, Inc., through its subsidiary, Heritage-Crystal Clean, LLC, provides parts cleaning, and hazardous and non-hazardous waste services to small and mid-sized customers in the manufacturing and vehicle maintenance sectors 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. This segment also provides oily water disposal and treatment, oil filter recycling, on-site cleaning, and waste management services, as well as sells solvents, machines, absorbents, and accessories. The Oil Business segment collects used oil and sells recycled fuel oil, as well as engages in the re-refining of used oil into lubricant base oil and other products. This segment also collects and disposes waste water; and removes and disposes used oil filters. As of December 31, 2016, the company operated through 83 branches serving approximately 107,000 customer locations. Heritage-Crystal Clean, Inc. was incorporated in 2007 and is headquartered in Elgin, Illinois.