In the tender for the separate collection of paper from roadside igloo bins in the Bologna area, for a basic tender amount of Euro technical component, 12 points were assigned to the type and planned maintenance of the machinery employed, to territorial structuring and to the organisation of the equipment service centres or storage sites, 10 to environmental sustainability aspects, with particular regard to the age of the machines and their environmental and acoustic impact, 6 to the qualification of the employed persons, 2 to the adoption of a code of ethics.