Case submitted by: BAM Milieu
Country: The Netherlands
Built-up site?: Yes
Follow-up required?: No
Treated contamination: Chlorinated Volatile Organic Compounds (CVOC)
Medium contamination: Groundwater
Dimension contamination: 45.000 m3
Remediation goal:
Final concentration
PCE concentration 10 μg/l
TCE concentration 143 μg/l
cis-DCE concentration 5 μg/l
vc concentration 1,25 μg/l
Remediation goal achieved?: No, monitoring of the passive remediation phase will start after applying protamylasse.
Initial and final concentration or load removal:
PCE initial concentration: 3000 μg/l; final concentration: 150 μg/l
TCE initial concentration: 2200 μg/l; final concentration: 83 μg/l
Cis-DCE initial concentration: 110 μg/l; final concentration: 39 μg/l
VC initial concentration: 1,25 μg/l; final concentration: 0,49 μg/l
Active remediation phase: 22/08/2005 until 2008
Passive remediation phase: The passive phase is not yet completed. Expacted realization period: 2008 until 2010
Added reports:
in situ sanering in wassenaar.pdf
Wassenaar (Langstraat): CVOC**
Summary
In-situ remediation technique: (Enhanced) natural attenuation, anaerobic, Pump & treat
General information
Project name: Wassenaar (Langstraat): CVOC**
Case submitted by: BAM Milieu
Contact: dhr. ing. I.R. Cornelissen
Address: Postbus 85, 3370 AB
Telephone number: +31 (0)184 - 676 847
Email-address: info@bammilieu.nl
Location
Country: The Netherlands
City/region/county: Wassenaar, Zuid-Holland
(future) use of location: Residence
Built-up location during the active remediation phase?: Yes
Technique
In situ saneringstechniek: (Enhanced) natural attenuation, anaerobic, Pump & treat
Explanation technique: Periodical extraction and infiltration.
Also other remediation techniques applied?: No
After care needed?: No
Rationale for the chosen technique: Feasability and presence of building and construction plans, conventional techniques were considered as comparable cost-effective. Enhanced biological degradation as alternative scenario.
Contamination
Treated contaminant(s): Chlorinated Volatile Organic Compounds (CVOC)
Contaminant phase: Groundwater
Size contamination: 45.000 m3
Depth contamination: 12 m below surface
Soil
Soil type: Mainly sand
Saturated/unsaturated zone?: Unsaturated zone
Permeability: > 0,1 m/dag, based on literature
Flow velocity or gradient groundwater:
Result, duration, expense
Remediation goal:
Final concentration
PCE concentration 10 μg/l
TCE concentration 143 μg/l
cis-DCE concentration 5 μg/l
vc concentration 1,25 μg/l
Remediation goal achieved?: No, monitoring of the passive remediation phase will start after applying protamylasse.
Initial and final concentration and load removal:
PCE initial concentration: 3000 μg/l; final concentration: 150 μg/l
TCE initial concentration: 2200 μg/l; final concentration: 83 μg/l
Cis-DCE initial concentration: 110 μg/l; final concentration: 39 μg/l
VC initial concentration: 1,25 μg/l; final concentration: 0,49 μg/l
Active remediation phase: 22/08/2005 until 2008
Passive remediation phase: The passive phase is not yet completed. Expacted realization period: 2008 until 2010
Total costs passive/after care phase:
Total costs active phase:
Stakeholders
Problem owner: Vastgoedontwikkelaar
Contractor: BAM Milieu
Remediation plan: Geofox-Lexmond
Remediation research: Geofox-Lexmond
Competent authority: Provincie Zuid-Holland
Contact information stake holders:
Additional information
Lessons learned: Staganting construction due to contructors bankruptcy. Confirm risks, consequences and liability prior to start of the project.
Remarks:
Related techniques and HIP-pilots
Related techniques: (Enhanced) natural attenuation, anaerobic, Pump & treat
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