The work carried out in accordance with this call for tenders shall be carried out:

+ Cleaning gullies, line/grid gutters and sand trapping;

+ Cleaning sewers;

+ Inspecting sewers;

+ Implementing traffic measures;

+ Carrying out work for calamities;

+ Performing additional work.

It concerns the annual cleaning of the gullies, the cleaning and inspection of part of the sewerage system in the municipality of Valkenburg aan de Geul.