These specifications relate to a framework agreement which has for object the cleaning of works (grit trap, sump, screen, aeration basins, various channels, etc.) of purification and draining operated by AIDE, and this, for a period of four years, renewable annually and tacitly subject to the proper execution of the services.

This contract is divided into three geographical lots mentioned below:

- lot 1: Liège area,

- lot 2: Verviers area,

- lot 3: Huy-Waremme area.

This lot relates to a framework agreement the purpose of which is to clean up works (sand trap, sump, screen, aeration basins, various channels, etc.) of purification and drainage operated by AIDE in the area. geographical area of Liège, for a period of four years, renewable annually and tacitly, subject to proper performance of the services.

This lot relates to a framework agreement the purpose of which is to clean up works (sand trap, sump, screen, aeration basins, various channels, etc.) of purification and drainage operated by AIDE in the area. geographical area of Verviers, for a period of four years, renewable annually and tacitly, subject to proper performance of the services.

This lot relates to a framework agreement the purpose of which is to clean up works (sand trap, sump, screen, aeration basins, various channels, etc.) of purification and drainage operated by AIDE in the area. geographical area of Huy, for a period of four years, renewable annually and tacitly, subject to proper performance of the services.