Case submitted by: A&G Milieutechniek bv
Country: The Netherlands
Built-up site?: Yes
Soil type: Layered soil; clay/peat/sand
Follow-up required?: Yes, monitoring stable final situation
Treated contamination: CVOC
Medium contamination: Soil/pure product and groundwater
Dimension contamination:
16.000 [m3] >I-value,
50.000 m3 >S-value
Remediation goal: Stable final situation; final concentration;
TCE concentration: 262 µg/l
111TCA concentration: 150 µg/l
CIS concentration: 20 µg/l
VC concentration: 2,5 µg/l
Remediation goal achieved?: No, remediation in progress
Initial and final concentration or load removal:
TCE initial concentration: 10.000 µg/l
111TCA initial concentration: 450 µg/l
CIS initial concentration: 150 µg/l
VC initialconcentration: 0 (
Active remediation phase: Started 01/05/09
Passive remediation phase: The passive phase is not yet completed
Geldrop (Peijnenburg): CVOC **
Summary
In-situ remediation technique: (Enhanced) natural attenuation, anaerobic
General information
Project name: Geldrop (Peijnenburg): CVOC **
Case submitted by: A&G Milieutechniek bv
Contact: Peter Middeldorp
Address: Postbus 660 5140 AR Waalwijk
Telephone number: +31 (0)416 - 344 044
Email-address: peter.middeldorp@aengbedrijven.nl
Location
Country: The Netherlands
City/region/county: Geldrop / Noord-Brabant
(future) use of location: Industrial
Built-up location during the active remediation phase?: Yes
Technique
In situ saneringstechniek: (Enhanced) natural attenuation, anaerobic
Explanation technique: Groundwater recirculation system with the addition of molasses and nutrients. Since the dechlorination by nature does not exceed CIS, dechlorinating bacteria (D. ethenogenes) are added to the site to stimulate dechlorination.
Also other remediation techniques applied?: No
After care needed?: Yes, monitoring stable final situation
Rationale for the chosen technique: The contaminated area is cultivated. Biological degradation occurs, but is not complete and not fast enough to avoid spread of the contamination. Therefore in situ stimulation with the use of natural degradation (by infiltration of a carbon source), nutrients and CVOC-degrading bacteria have been applied. A recirculation of groundwater has been applied to keep the contamination at it’s place.
Contamination
Treated contaminant(s): CVOC
Contaminant phase: Soil/pure product and groundwater
Size contamination:
16.000 [m3] >I-value,
50.000 m3 >S-value
Depth contamination: 11 m below surface >I-value
Soil
Soil type: Layered soil; clay/peat/sand
Saturated/unsaturated zone?: Saturated zone
Permeability: > 0,1 m/day
Flow velocity or gradient groundwater: 33 meter/year
Result, duration, expense
Remediation goal: Stable final situation; final concentration;
TCE concentration: 262 µg/l
111TCA concentration: 150 µg/l
CIS concentration: 20 µg/l
VC concentration: 2,5 µg/l
Remediation goal achieved?: No, remediation in progress
Initial and final concentration and load removal:
TCE initial concentration: 10.000 µg/l
111TCA initial concentration: 450 µg/l
CIS initial concentration: 150 µg/l
VC initialconcentration: 0 (
Active remediation phase: Started 01/05/09
Passive remediation phase: The passive phase is not yet completed
Total costs passive/after care phase:
Total costs active phase: €134.000,-
Stakeholders
Problem owner: Koninklijke Peijnenburg BV
Contractor: A&G Milieutechniek bv
Remediation plan: Tritium Advies bv
Remediation research: Tritium Advies bv
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
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 Specific monitoring biological degradation