the purpose of the contract is to carry out sanitation master plans in the municipalities of Longuesse, Vigny, Commeny, Nucourt and Cléry en Vexin

The Study is divided into 4 phases:- phase 1: inventory, data collection and pre-diagnosis of the sanitation system- phase 2: measurement campaigns (flow rates and pollutant loads) and field investigations- phase 3: Additional investigations, location of anomalies and diagnosis of the functioning of the sanitation system- phase 4: Construction of the sanitation master plan - zoning