The sanitation system in the municipality of Saint-Laurent du Maroni can no longer satisfy the increasing urbanisation to which the latter is subject. Indeed, the Fatima lagoon faces a congestion causing a heavy overload. To compensate for this, the municipality of Saint-Laurent du Maroni has undertaken the construction of a sludge-type Pôle Epuratoire activated during the period of the OP 2007-2013. Unfinished over this period, the project runs on the OP 2014-2020. As such, the promoter submits to us Phase 2 — tranche 2 of this project.