Dépollution of the Tuileries LAFARGE tile factory at Marseilles When the Tuileries LAFARGE factory at Marseilles was being closed down, ORTEC Generale de Depollution carried out the initial diagnostic, then the in-depth diagnostic of the land. The results indicated the considerable soil contamination near to old fuel tanks. Following this investigation program, ORTEC Generale de Depollution gave a commitment concerning the extent of the hydrocarbon contamination, and proposed an all-in fee for the site depollution. Since work had to be carried out at considerable depth (5 metres) at the foot of a railway embankment, a special soil excavation and treatment method had to be designed and implemented. Vibration tests, installation of Berlin walls and earthworks in alternate strips, checking of water supplies and special backfills were required in order to manage this site to cope with the stability constraints and evacuate 2000 m3 of earth to biocentre. The operation also involved the degassing and evacuation of three overhead tanks, demolition of premises and evacuation of site waste. The geotechnical constraints and deadlines were respected and the rehabilitation objectives reached within the specified budget.