In the negotiated procedure public tender, published in assignment of the “global service” maintenance service relating to the real estate and plant engineering assets of the whole of the area pertaining to Hera S.p.A., for a tender amount of Euro 60 million (around Euro 15 million a year), of the 60 points reserved for the technical component, 6 were reserved for the introduction of individuals facing social hardships, 7 for environmental sustainability (reduction of consumption on properties indicated in the specifications) and 12 for social sustainability (possession of SA8000, OHSAS18001 certification and accident frequency indices).