Summary

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

Case detailed information

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
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