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
In-situ remediation technique: (Enhanced) natural attenuation, anaerobic, In situ chemical Oxidation (ISCO), Pump & treat, Soil vapor extraction
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
In situ saneringstechniek: (Enhanced) natural attenuation, anaerobic, In situ chemical Oxidation (ISCO), Pump & treat, Soil vapor extraction
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
Related techniques: (Enhanced) natural attenuation, anaerobic, In situ chemical Oxidation (ISCO), Pump & treat, Soil vapor extraction
Related HIP-pilots: HIP-pilot Assessing stable end situation CVOC 1, HIP-pilot Assessing stable end situation CVOC 2, HIP-pilot Direct push shock load protamylasse – radius of influence and effect substrate, HIP-pilot Field comparison 2 substrates for anaerobic degradation CVOC, HIP-pilot Optimizing ISCO for CVOC, HIP-pilot Specific monitoring biological degradation