Heritage-Crystal Clean, Inc. is a provider of parts cleaning, containerized waste management, used oil collection and vacuum truck services and own and operate a used oil re-refinery. The Company operates in two segments: Environmental Services and Oil Business. The Company offers an integrated suite of industrial and hazardous waste services including parts cleaning, containerized waste management, used oil collection and re-refining, and vacuum truck services. In the Company�s non-hazardous program, it provides its customers an alternative parts cleaning solvent not included in the definition of hazardous waste due to its increased flashpoint (the minimum temperature at which vapors from the solvent ignites when tested under specified laboratory conditions). In February 2013, it acquired a majority interest in Mirachem LLC.