Project Type:
Decontamination of the saturated zone due to the presence of free-phase hydrocarbons and dissolved chemical compounds (hydrocarbons and organochlorines), through a selective pumping system equipped with skimmers for free-phase extraction and standard pumping for dissolved compounds. The treatment train includes decantation, phase separation, air stripping, activated carbon (water and air), and final water treatment with zeolites. The process is complemented by a downstream hydraulic barrier as a control zone.
Conceptual Framework:
- Industrial site for manufacturing automotive parts. Contamination caused by historical diesel leaks from the heating system and occasional discharges of chlorinated solvents. Main impact located in the saturated zone, at depths of up to 25 meters.
- Decontamination:
o Preliminary delineation of the contamination plume
o In situ pilot tests to size the pumping system
o Installation of pneumatic pumps with skimmers to optimize free-phase extraction, minimizing waste generation and effluents
o Phase II: direct pumping to reduce dissolved-phase contamination
o Treatment train: decantation, phase separation, stripping, activated carbon (water and air), and zeolite filtration
Objective:
Removal of free-phase hydrocarbons and reduction of dissolved-phase compounds to below VGI thresholds
Data:
- Free-phase contamination plume: 4,500 m²
- Volume of water extracted: 9,800 m³
- Volume of free-phase extracted: 10.6 m³
- Results after 1 year of treatment:
