Open Procedure, Called Pursuant To Articles 71, 153 And 107, Paragraph 3, Of Legislative Decree No. 36/2023, Managed Electronically, For The Assignment Of Two Framework Agreements, Each With A Single Economic Operator, Concerning The "Self-Pitter Service For The Maintenance Of Sewage Networks, Lifting And Purifiers In The Area Of ​​The Area Of ​​The