The contract is for the collection of septic sludge in Bergen municipality.The Water and Sewage Department is, pursuant to the local regulations on compulsory emptying of private interceptors for sludge dated 25.11.2015, responsible for administering the emptying of private interceptors for sludge in Bergen municipality.The assignment currently consists of approx. 5 700 interceptors for sludge. As a main rule, the tanks in year-round residences shall be emptied every 2nd year, some tanks shall be emptied annually, whilst tanks at holiday homes shall be emptied every 4th year. Larger interceptors for sludge shall be emptied annually, sometimes more frequently (every 6 and every 3 months).The sludge shall be transported to a central reception facility, which is currently at Flesland treatment facility. During the contract period the service provider can reckon on this transportation moving too the new biogas facility in Rådalen.A dewatering vehicle is required for larger interceptors for sludge, and the dry matter must be delivered to another reception facility.See the requirement specifications (Annex 1 of the contract) for further information.