Market Survey Aimed At Identifying The Economic Operators To Be Invited To The Subsequent Negotiated Procedure, Pursuant To Art. 50, Paragraph 1 Letter E) Of Legislative Decree 31 March 2023, N. 36, Aimed At The Acquisition Of The 24/7 Ordinary And Extra-Fee Maintenance Service For Lifting Pumps, Septic Tank Drainage, Pump Wells, Rainwater And/Or Sewerage Wells And Sewerage Pipes At The Asp Immes And Pat Institutes For A Duration Of 24 Months.