Relative to the parameters for which Legislative Decree continual monitoring (total metals, aromatic polycyclic hydrocarbons, dioxins and furans, cadmium and thallium, and mercury), on all incinerators managed the Hera Group has carried out a total of 547 samples, in full compliance with the individual plant authorisations, a considerably higher number than the 105 provided for in national regulations, the 335 established by the IEA and the 432 carried out in 2010.