54_280 Contract Comprehensive Monitoring, Analysis And Maintenance Services Of The Water Supply, Basic Sanitation And Environmental Management Systems In The Headquarters Of The Sena Regional North Of Santander, Including Water Quality Analysis, Disinfection And Control Of Tanks In Accordance With The Resolution 2115 Of 2007, Maintenance Of Hydrosanitary Networks And Management Of Hazardous Waste, To Ensure Adequate Sanitary Conditions For Comprehensive Professional Training.