The services concern the operation of the following structures:-gravity or backflow wastewater treatment networks;-the part of the special connections located under public domain or servitude (including disconnecting siphons which will be operated when they are located on public property);-lifting/discharge stations on wastewater networks and associated equipment; - all sewerage works attached to wastewater and combined water networks and in particular the individual structures mentioned in the specifications such as storm overflows, .

The services concern the operation of the following structures:-gravity or backflow wastewater treatment networks;-the part of the special connections located under public domain or servitude (including disconnecting siphons which will be operated when they are located on public property);-lifting/discharge stations on wastewater networks and associated equipment; - all sewerage works attached to wastewater and combined water networks and in particular the individual structures mentioned in the specifications such as storm overflows, .