Aisch - full scale BTEX soil and groundwater remediation

Aisch (Namur) concerns the remediation of a deep (>11 mbgl) BTEX contamination in the unsaturated zone at a large high way petrol station. Significant residual contamination is still present after shallow excavation and horizontals SVE was conducted in the past.

After succesfull pilot testing, a vertical SVE system and innovative biological air abatement system was designed by Greensoil to effectively treat the 12T of residual contamination.

Specifications

Location Aisch, Belgium
Client Kuwait Petroleum
Duration Q1 2017 - Q1 2020
Contract Time and expenses
Contamination Mineral oils and BTEX 
Techniques Pump and treat & soil vapor extraction
Installation

ATEX blower unit (500m³/hr)

Biological air abatement system (compost filter)

GAC filtration (polishing step)

Biological groundwater treatment system (10m³/h)

In numbers

Project value > 500.000 €
Soil volume N/A 

Concentration


in soil  

in water  

Max. conc. Objective Status
> 4.000 mg/kg BTEX, TPH 0,2 - 0,7 mg/kg BTEX ongoing
10.000 µg/l 10-50 µg/l (VS/VR) ongoing
Number of wells

46 soil vapor extraction wells

6 deepwells

Project specs

In-situ: soil vapour extraction &  pump and treat

Treatment system: biological groundwater treatment & biological air abatement

Contamination: BTEX and mineral oils & MTBE