Routine operations to renew or reinforce drinking water networks and to treat stormwater and wastewater in public spaces. The works are respectively carried out on behalf of the Syndicat Mixte d'eau Potable des Sablons, the Syndicat Mixte d'assainissement des Sablons and the Communauté de Communes de Sablons, according to their own competences, within the framework of a control group.

the works, carried out under the Quality Charter, concern current operations by open trench excluding trenchless rehabilitation services. Replacements of rehabilitated network connections are included in this Framework Agreement. Orders may concern simultaneous interventions on drinking water and wastewater and stormwater treatment networks: reinforcement, renewal, excluding simple connection, new and maintenance work