Sewer Cleaning Services – Framework Agreement For Sewer Cleaning And Sewer Tv Inspection. The Advertised Service Includes Regular Mechanical Cleaning And Standard-Compliant Inspection Of The Public Wastewater Systems In The Urban Area Of The Kolpingstadt Kerpen. The Basis Is The Entire Canal Network With A Total Length Of Around 290 Km And Around 8,255 Shaft Structures. The Cleaning Includes Maintenance Cleaning, Special Cleaning And Predictive Cleaning In The Form Of High-Pressure Flushing With Water Recovery In Accordance With The Specifications Of Dwa-M 197 And Within The Framework Of The North Rhine-Westphalia Wastewater Self-Monitoring Ordinance (Süwvo Abw. Nrw). In Addition To The Sewer Lines, The Associated Shaft Structures, Pumping Stations, Storage Channels And Rainwater Inlets Of Various Types - In Particular Underground Pump Shafts And, To A Lesser Extent, Above-Ground Pumping Station Buildings - Must Also Be Completely Cleaned. Cleaning Is Carried Out On A District-By-District Basis; The Urban Area Is Divided Into Seven Cleaning Districts. As A Rule, Around Two Districts Have To Be Completely Cleaned Every Year. The Scope Is Subject To Changes Due To New Construction Or Development Measures As Well As Legally Required Investigations; There Is No Legal Entitlement To Specific Quantities. The Inspection Of The Sewer Pipes And Shafts Is Carried Out In Accordance With The Standards Of The Süwvo Abw. Nrw, Din En 13508-2 (2003) And Dwa-A 149-1 To Dwa-A 149-9. In Addition, Acceptance Inspections Must Be Carried Out As Part Of New Construction And Conversion Measures, Warranty Checks And Special Inspections. The Annual Inspection Volume Is Approx. 20 Km Of Sewer Lines (Corresponds To Around 7% Of The Sewer Network). The Positions Intended For This Must Be Prepared As Part Of The District Cleaning, Whereby The Subsequent Tv Inspection Must Be Carried Out Within 48 Hours Of Cleaning At The Latest. Access Is Carried Out By District Or Street, With The Wastewater System Being Designed As A Separate Or Mixed System Depending On The District. In Addition, Around 400 Property Connections From The Main Line To The Property Line Must Be Inspected Every Year. The Inspections Must Be Carried Out In Accordance With Dwa-A 149-5 Using The Condition Coding In Accordance With Din En 13508-2 (2003). To Process The Services, A Sufficient Number Of Tv Inspection Vehicles With Crew Must Be Available, Which Enable An Average Daily Performance Of Approx. 300-400 M.
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