Open Electronic Procedure Pursuant To Art.71 Of Legislative Decree 36/2023 – Special Sectors – For The Assignment Of: Lot 1: Lotto 1: Self -Gut Service For The Maintenance Of The Purifiers Managed By Asm Pavia S.P.A.; Lot 2: Spurgi Spenamenti, Drainage And Lifting Stations Managed By Asm Pavia S.P.A.