Summary

Case submitted by: Heijmans Infra Techniek
Country: The Netherlands
Built-up site?: Yes
Soil type: Layered soil clay/peat/sand
In-situ remediation technique: In situ chemical Reduction (ISCR)
Follow-up required?: Monitoring
Treated contamination: Chlorinated Volatile Organic Compounds (CVOC)
Medium contamination: Soil/pure product and groundwater
Dimension contamination: 8000 m3
Remediation goal: Control
Remediation goal achieved?: No, there is still water extraction and the site is still being monitored
Initial and final concentration or load removal:
Tetrachloro-ethene initial concentration: 10000 ug/l
Trichlooretheen initial concentration: 10000 ug/l
Active remediation phase: Applied in 2001, started in 2005 untill 2008
Passive remediation phase: The passive remediation phase is not yet completed. Expected realization period: 2008 untill unknown. Permanent control required.

Added reports:
Amersfoort Eindrapport

In-situ remediation technique:

Case detailed information

General information
Project name: Amersfoort: CVOC*** Case submitted by: Heijmans Infra Techniek Contact: Dhr. A. Peene Address: Postbus 68 / 5240 AB Rosmalen Telephone number: +31 (0)73 543 68 01 Email-address: apeene@heijmans.nl
Location
Country: The Netherlands City/region/county: Amersfoort, Utrecht (future) use of location: Residential Built-up location during the active remediation phase?: Yes
Technique
In situ saneringstechniek:
Explanation technique: Funnel & Gate Also other remediation techniques applied?: No After care needed?: Monitoring Rationale for the chosen technique: Control in urban areas, surface treatment undesirable and extensive care is needed.
Contamination
Treated contaminant(s): Chlorinated Volatile Organic Compounds (CVOC) Contaminant phase: Soil/pure product and groundwater Size contamination: 8000 m3 Depth contamination: 13 m below surface
Soil
Soil type: Layered soil clay/peat/sand Saturated/unsaturated zone?: Saturated zone Permeability: 0,01-0,1 m/day Flow velocity or gradient groundwater:
Result, duration, expense
Remediation goal: Control Remediation goal achieved?: No, there is still water extraction and the site is still being monitored Initial and final concentration and load removal: Tetrachloro-ethene initial concentration: 10000 ug/l Trichlooretheen initial concentration: 10000 ug/l Active remediation phase: Applied in 2001, started in 2005 untill 2008 Passive remediation phase: The passive remediation phase is not yet completed. Expected realization period: 2008 untill unknown. Permanent control required. Total costs passive/after care phase: € 1500.000,- Total costs active phase: € 1.000.000,-
Stakeholders
Problem owner: CSG Eemkwartier Contractor: Heijmans Infra Techniek Remediation plan: Heijmans Milieutechniek (Now: Heijmans Infra Techniek) Remediation research: Competent authority: Provincie Utrecht Contact information stake holders:
Additional information
Lessons learned: Working in a closed system with a free-fall below the groundwaterlevel is very sensitive. Remarks:
Related techniques and HIP-pilots
Related HIP-pilots: