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In-situ Chemical Oxidation (ISCO)
 
In-situ Chemical Oxidation (ISCO) is mainly carried out for remediation within the contamination source-zone on highly contaminated sites.  Source-zones can quite often be found at considerable depth or underneath buildings, making soil excavation either impossible or extremely cost-ineffective.
Mobile dosing
Injection wells
Case study: ISCO-Process
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We apply ISCO to sites containing the following contaminants:
 
Semi-Volatile Halogenated Hydrocarbons (SVHH) or Semi-Volatile Organic Compounds (SVOC)
Benzene, Toluene, Ethylbenzene and Xylene (BTEX)
MTBE
Alkylphenol
Polycyclic Aromatic Hydrocarbons (PAH)
A laboratory-scale trial-phase should always precede an ISCO Remediation in order to establish the correct oxidizing agent and the required dosage amounts and intervals. These trials are carried out either in the Laboratory or Technical Centre in the form of batch- or column-tests. Field-studies also serve to determine the desired infiltration amounts and coverage.
 
Establishment of an infiltration system, adapted to site conditions (soil composition, Hydrogeology, landuse) and with appropriate monitoring wells, is also necessary for the ISCO Process.
 
Once significantly reduced contaminant concentrations are attained, there is the opportunity to continue with the more cost- effective microbiological process.
 
The ISCO Process can be remotely monitored and totally automatically operated.
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