Open Procedure, Divided Into 3 Lots, For The Conclusion Of A Framework Agreement Lasting 36 Months, With A Single Economic Operator For Each Lot, Pursuant To Art. 154 Of Legislative Decree. N. 36/2023. Planning And Coordination Of Safety In Planning And Execution In The Context Of Conservative And Extraordinary Maintenance Of The Integrated Water Service Systems. App Ref. 8/2026.