The purpose of this contract is to carry out a geotechnical engineering mission prior to the installation of pipelines for drinking water in the municipalities of Vias and Bessan (34) to be carried out by the Syndicat intercommunal d'adduction d' water of the communes of Bas-Languedoc (SBL), as part of the development and consolidation of its drinking water network.

The purpose of this contract is to carry out a geotechnical engineering mission prior to the installation of pipelines for drinking water in the municipalities of Vias and Bessan (34) to be carried out by the Syndicat intercommunal d'adduction d' water of the communes of Bas-Languedoc (SBL), as part of the development and consolidation of its drinking water network. This work consists mainly in the laying of a Ø500 mm pipeline between Florensac and Vias Village and Ø400 / Ø300 from Vias Village to Vias Plage, to link the pumping station of Florensac to the tower tank of Vias Village and the drinking water treatment plant of Vias beach. With reference to standard NF P 94-500: geotechnical engineering mission - classification and specifications, as of 30.11.2013, this mission includes services related to:

- the "AVP" phase: geotechnical design studies (G1 + G2) - the preliminary design phase (AVP): definition and comparison of possible solutions for the project,

- the "PRO" phase: geotechnical design studies (G2) - Project phase (PRO): project design and justifications. This basic mission is completed by the following optional missions:

- "DCE / ACT" phase of the geotechnical design study (G2): consultation on the basic project, choice of the company and development of the works contract,

- "EXE / VISA" phase of the geotechnical execution supervision (G4): supervision of the geotechnical execution study,

- "DET / AOR" phase of the geotechnical execution supervision (G4): supervision of the geotechnical follow-up of execution.