Invitation to prequalify using restricted procedure, deadline 16.01.2014, for expansion of Bekkelaget treatment plant comprising 250 m-long transfer tunnel, 800 m-long access tunnel, six rock halls, technical room and 50 m-long ventilation tunnel. Start of works mid-2014. Register interest at http://www.doffin.no/Search/Search_Switch.aspx?ID=312959. Further information, specs and docs from Lars Gautvik at Oslo Kommune, tel +47 02180, internet address www.vann-op-avlopsetaten.oslo.kommune.no, to whom tenders or requests to participate must be sent. Visit http://ted.europa.eu/udl?request=Seek-Deliver&language=en&docid=425627-2013. 51/13.