Soil and groundwater of a multinational car parts manufacturer was impacted with chlorinated volatile organic compounds (cVOC) due to site activities. Two main contaminated areas have been identified: Area 1 & 2. In both areas mostly of the contamination is located outside the buildings, but there is also contamination located underneath two different production buildings.
The remediation strategy suggested by GreenSoil Group and selected to treat the contamination in-situ consisted in two independent full-scale remediation systems. In both areas the contamination was spread to 2 different depths: shallow down to 11 m-bgl and deep down to 15 m-bgl. The two systems were designed to stimulate the anaerobic microorganisms present at the site and enhanced the biodegradation of all contaminants. The goal was to stimulate the anaerobic biological degradation of chlorinated compounds using a combination of direct push and groundwater circulation dosing system of the electron donor Dehalo-GS.
GreenSoil installed the entire in-situ remediation system underneath the building and roads the in Area 1 & 2. Complying with the requirements of the client (most of the work executed in the night, weekends and holidays). The system consisted of 6 extraction wells and 24 infiltration wells, with shallow and deep infiltration wells to stimulate the anaerobic biological degradation in the soil layer until 15 m-bgl.
To enhance the anaerobic biodegradation of the different cVOCs, the contaminated groundwater was extracted, and the GreenSoil’s electrondonor (Dehalo GSTM) was added prior to being infiltrated back into the soil.
Further evidence of the effectiveness of the bioremediation system, groundwater samples were collected for QPCR analysis at the beginning, after 12 months and at the conclusion of the project
All the Control Units were designed in Europe and assembled in Brazil.
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