The works consisted on the environmental supervision of the construction of 13 stations and 6 ventilation shafts of the Line 9 Barcelona Subway in the municipalities of El Prat de Llobregat, L’Hospitalet de Llobregat and Barcelona.
The main environmental issues:
- The stations are situated over the Llobregat River Aquifer which is legally protected by the Catalan laws
- The works were developed in an urban area, with high density of population
- Affectation of services and population mobility
- Presence of polluted soils due to the existence of ancient high polluting industries
Services
Environmental supervision of construction works. The main tasks:
- Monitoring the contractor’s Environmental Managing Plan, containing the mitigation measures included in the Environmental Impact Statement
- Monitoring of the piezometric level and water quality of the protected aquifer
- Monitoring of sealing of deep wells and piezometers affected by construction works
- Monitoring the volume and quality treatment of pumped water before their discharge to sewage system.
- Monitoring of noise levels around the work areas
- Monitoring of the construction spoil management plan
- Monitoring of the waste management plan
- Monitoring of measures to keep the air quality
- Monitoring of management of polluted soils
- Communication and coordination with the environmental technics of local governments
- Writing of monthly reports
