Lindesnes municipality shall upgrade the treatment process at Grønvika treatment facility (RA). The treatment plant was commissioned in 2000 and the facility currently has BIO-P (active sludge installations) and chemical traps. The aim of the procurement is to enable the plant to meet the current phosphor requirements and make the plant more robust towards future requirements, the aim is that the plant is dimensioned to function up until the year 2050. The execution model for contract E1 - process and machine is interaction with a turnkey contract. This model starts with an interaction phase that ends with a complete and approved preliminary project. Thereafter follows the execution phase which will be carried out as a regular turnkey contract. The contracting authority has the right to cancel the contract before and in connection with the transition between the phases. See part II of the contract documentation for further information on the procurement and execution.