Summary

Case submitted by: HMVT
Country: The Netherlands
Built-up site?: Yes
Soil type: Mainly sand
Follow-up required?: Monitoring
Treated contamination: Chlorinated Volatile Organic Compounds (CVOC)
Medium contamination: Soil/pure product and groundwater
Dimension contamination: 514.800 m3
Remediation goal: Stable end situation
PCE concentration 20 µg/l
TCE concentration: 262 µg/l
cis concentration: 10 µg/l
vc concentration: 2,5 µg/l
Remediation goal achieved?: Project under construction.
Initial and final concentration or load removal:
Active remediation phase: 01/09/2007 until 01/03/2015

Case detailed information

General information
Project name: Den Bosch (de Kruithoorn): CVOC* Case submitted by: HMVT Contact: Ted Vendrig Address: Postbus 174 6710 BD Ede Telephone number: +31 (0)318-624 624 Email-address: info@hmvt.nl
Location
Country: The Netherlands City/region/county: 's Hertogenbosch (future) use of location: Industrial, residential Built-up location during the active remediation phase?: Yes
Technique
Explanation technique: Project consists of several phases. The hot spots are remediated by combining chemical oxidation and enhanced biological degradation (slow release substrate ENNA). During the chemical oxidation the soil vapor extraction was applied to remove contamination from the unsaturated zone and for catching the released gases during the chemical oxidation. For the plume, a carbon source (substrate) was applied in favour of anaerobic degradation. Pump and treat is applied in order to enhance the contact between contamination and the substrate. Also other remediation techniques applied?: No After care needed?: Monitoring Rationale for the chosen technique: By experience we learned that the combination of chemical oxidation and bilogical stimulation reduces the contamination to acceptable values. Soil vapor extraction is needed for preventing evaporation.
Contamination
Treated contaminant(s): Chlorinated Volatile Organic Compounds (CVOC) Contaminant phase: Soil/pure product and groundwater Size contamination: 514.800 m3 Depth contamination: 22 m below surface
Soil
Soil type: Mainly sand Saturated/unsaturated zone?: Saturated zone Permeability: Flow velocity or gradient groundwater: 10-15 m/year
Result, duration, expense
Remediation goal: Stable end situation PCE concentration 20 µg/l TCE concentration: 262 µg/l cis concentration: 10 µg/l vc concentration: 2,5 µg/l Remediation goal achieved?: Project under construction. Initial and final concentration and load removal: Active remediation phase: 01/09/2007 until 01/03/2015 Passive remediation phase: Total costs passive/after care phase: Total costs active phase: € 995.000 ,-
Stakeholders
Problem owner: Contractor: HMVT/Oranjewoud Remediation plan: Grontmij Remediation research: Arcadis Competent authority: Provincie Noord Brabant Contact information stake holders:
Additional information
Lessons learned: Remarks:
Related techniques and HIP-pilots