According to the European and the Italian legislation, a preliminary inventory of equipment containing PCB oils was carried out in Italy in 2000 and had to be updated every two years. Equipment containing insulating oils with more than 500 ppm (500 mg/kg) of PCBs has to be decontaminated or eliminated by December 2010. As a result, a constant decrease in PCB contaminated equipment was achieved in Italy over the years 2000 to 2004.