Assignment Of The Maintenance Service Of The Instrumental Network For Acquisition Of Hydrological, Meteorological And Nivological Monitoring Data Of Arpa Lombardy, Through A European Tender Procedure In Accordance With Legislative Decree 36/2023, Managed Through The Sintel Di Aria S.P.A. Platform, With The Awarding Criterion Of The Most Economicly Advantageous Offer And Divided Into Three Lots: Lot A: Assistance And Support For Civil Protection Regarding Risk Natural And Warning Lot B: Water Balance Network Lot C: Environmental Monitoring, Climatology And Humidity Fuel Forest Fires