Extension and rehabilitation of sanitation networks and collectors across the municipalities of Ain Temouchent, Beni Saf, Oulhaca, Hammam Bouhadjar, Ain Kihal, Amria, El Malah, Ain Larbaa, Sidi Ourriéche, Tamazoura, Emir Abdelkader, and Terga (W Aln Temouchent)