The works involve: - Operations for blanking/cleaning/excavation on existing structures; - The installation of a new waterproofing system (geomembrane placed between two geotextiles), topped with treated gravel facilitating non-routine maintenance operations (cleaning); - The establishment of entry and exit structures requiring minimal routine maintenance; - Site development to facilitate routine maintenance operations (creation of access ramps and renovation of the track).

LOT-0003
Lot No. 1 Sanef - Rehabilitation of anti-pollution basins A1-A2-A26 Arras and Cambrai Centers.
The works involve: - Operations for blanking/cleaning/excavation on existing structures; - The installation of a new waterproofing system (geomembrane placed between two geotextiles), topped with treated gravel facilitating non-routine maintenance operations (cleaning); - The establishment of entry and exit structures requiring minimal routine maintenance; - Site development to facilitate routine maintenance operations (creation of access ramps and renovation of the track).

LOT-0004
Lot No. 2 Sanef - Rehabilitation of anti-pollution basins A26 HDA Center.
The works involve: - Operations for blanking/cleaning/excavation on existing structures; - The installation of a new waterproofing system (geomembrane placed between two geotextiles), topped with treated gravel facilitating non-routine maintenance operations (cleaning); - The establishment of entry and exit structures requiring minimal routine maintenance; - Site development to facilitate routine maintenance operations (creation of access ramps and renovation of the track).

LOT-0005
Lot No. 3 Sanef - Rehabilitation of anti-pollution basins A16 Wailly-Beaucamp Center.
The works involve: - Operations for blanking/cleaning/excavation on existing structures; - The installation of a new waterproofing system (geomembrane placed between two geotextiles), topped with treated gravel facilitating non-routine maintenance operations (cleaning); - The establishment of entry and exit structures requiring minimal routine maintenance; - Site development to facilitate routine maintenance operations (creation of access ramps and renovation of the track).

LOT-0006
Lot No. 4 Sanef - Rehabilitation of anti-pollution basins A26 Saint Quentin Center.
The works involve: - Operations for blanking/cleaning/excavation on existing structures; - The installation of a new waterproofing system (geomembrane placed between two geotextiles), topped with treated gravel facilitating non-routine maintenance operations (cleaning); - The establishment of entry and exit structures requiring minimal routine maintenance; - Site development to facilitate routine maintenance operations (creation of access ramps and renovation of the track).