In May 1994, Portugal became a part of the Basel Convention on the Control of Transboundary Movements of Hazardous Wastes and their Disposal, being obliged to carry out the regulation nrº 1013/2006/CE of the European Parliament and Council [7]. In July 1995, it was elaborated the National Project Plan of Solid Waste which included industrial waste. This project estimated that in 1994 Portugal produced 4.4 million tons of waste and 31% (1.37 million tons) were defined to be of hazardous type. The aim of this plan, with respect to the hazardous industrial waste, was that 82.9 % should be treated locally and to include 17.09% in Integrated Systems of Industrial Waste Treatment (ISIWT). The ISIWT were composed by one incinerator, one physic-chemical treatment unit and two landfills