Description of the job
- Asbestos-containing materials mapping within the decommissioned buildings and remediation intervention planning
- Demolition of decommissioned structures
- Removal and disposal of soil found to be contaminated during the characterisation first phase in this area
- Characterisation second phase and remediation intervention planning
Given the significant quantity of soil treated, careful planning was needed for the excavation geometry, the temporary storage areas for non-contaminated soil, which were to be re-used in this area, and for soil to be analysed more in depth.
Materials to be characterised were stored using waterproof HDPE sheets so as to guarantee the protection of the subsoil from any contaminant.
During the first soil removal phase, a second in-depth contamination front was discovered, since it was not identified by the initial characterisation. The second characterisation made it possible to identify this front in detail and to plan the best solution to the problem.
The depth of the excavations (up to 10 metres) and the state of neglect of the area.
Added value of the activity
The second-phase characterisation made it possible to better identify the causes and the state of contamination of this site, so as to optimise the interventions and provide monitoring points for the water conditions.
Cost of the works
Worksite managers: 2
Specialised workers: 6
Waste disposed of
Contaminated soil and rocks: 20,000 m3
Friable asbestos-containing materials: 1.5 tons
Cement-asbestos materials: 50 tons.
Other waste: 1,500 tons.