Notice for qualification system, indefinite duration, for construction work for gas pipelines, tunnels, mini-tunnels and micro-tunnels. Contact Sam Rete Gas SpA, San Donato Milanese, fax +39 0237037570, e-mail mevem@snamretegas.it. Visit http://ted.europa.eu/udl?request=Seek-Deliver&language=en&docid=459295-2015. 53/15.