These special specifications relate to a service contract divided into 4 separate lots, including the following services:

• lot 1: maintenance of 22 FLYGT submersible pumps equipping the Liège-Oupeye wastewater treatment plant (Oupeye) and the Milsaucy pumping station (Herstal);

• lot 2: maintenance of 24 FLYGT submersible pumps equipping the Liège-Sclessin (Liège), Grosses-Battes (Liège) wastewater treatment plants and the Tihange (Huy), Grosses-Battes n°2 (Liège) and Cité Delrée (Esneux) pumping stations;

• lot 3: maintenance of 18 GRUNDFOS submersible pumps equipping the pumping stations of Ponçay (Herstal), Ampsin (Amay) and Piedboeuf (Liège);

• lot 4: maintenance of 4 ENSIVAL submersible pumps equipping the main pumping station of the Wegnez wastewater treatment plant (Pepinster).

This batch corresponds to the preventive and/or curative maintenance of 22 FLYGT submersible pumps equipping the Liège – Oupeye wastewater treatment plant (Oupeye) and the Milsaucy pumping station (Herstal).

This batch corresponds to the preventive and/or curative maintenance of 24 FLYGT submersible pumps equipping the wastewater treatment plants of Liège – Sclessin (Liège), Grosses Battes (Liège) and the pumping stations of Tihange (Huy), Grosses Battes n°2 (Liège) and Cité Delrée n°4 (Esneux).

This batch corresponds to the preventive and/or curative maintenance of 18 GRUNDFOS submersible pumps equipping the pumping stations of Ponçay (Herstal), Ampsin (Amay) and Piedboeuf (Liège).

This batch corresponds to the preventive and/or curative maintenance of 4 ENSIVAL submersible pumps equipping the main pumping station of the Wegnez wastewater treatment plant (Pepinster).