Clean Harbors Inc was incorporated in Massachusetts in 1980. The Company is a provider of environmental, energy and industrial services and hazardous waste management services throughout Canada. The Company operates in five reportable segments: Technical Services, Oil Re-refining and Recycling, SK Environmental Services, Industrial and Field Services, Oil and Gas Field Service. The Technical Services segment provides hazardous material management services including the packaging, collection, transportation, treatment and disposal of hazardous and non-hazardous waste at Company-owned incineration, landfill, waste water and other treatment facilities. Oil Re-refining and Recycling segment processes used oil into quality base and blended lubricating oils. Processing into base and blended lubricating oils takes place in its three owned and operated re-refineries and recycling of oil into recycled fuel oil takes place in one of the Company's used oil terminals. SK Environmental Services segment provides environmental services such as parts cleaning, containerized waste services, oil collection, and other complementary products and services, including vacuum services, allied products and other environmental services, Industrial and Field Services provides industrial and specialty services such as high-pressure and chemical cleaning, catalyst handling, decoking, material processing, and industrial lodging services to refineries, chemical plants, oil sands facilities, pulp and paper mills, and other industrial facilities. Oil and Gas Field Services provides fluid handling, fluid hauling, production servicing, surface rentals, seismic services, and directional boring services to the energy sector serving oil and gas exploration and production, and power generation. The Company serves a customer base, including a majority of the Fortune 500, across the chemical, energy, manufacturing and additional markets, as well as numerous government agencies. Philip Services Corp., or "PSC," Veolia Environmental Services, or "Veolia," and Waste Management, Inc., or "WM," are the principal national firms with which the Company competes. The Company is subject to federal and state environmental laws in the United States.