Summary

Case submitted by: BioSoil
Country: The Netherlands
Built-up site?: No
Soil type: Mainly sand
Follow-up required?: Yes
Treated contamination: Mineral oil
Volatile aromats, including benzene (BTEX)
Medium contamination: Soil/pure product and groundwater
Dimension contamination: 4300 m3(soil); 3600 m3 (groundwater)
Remediation goal: Stable end situation
Remediation goal achieved?: Yes
Initial and final concentration or load removal:
Mineral oil initial concentration: 2100 µg/l; final concentration: < 325 µg/l(almost all monitoring wells < 50µg/l)
BTEX initial concentration: 2320 µg/l; final concentration: Below T-value for all components
Active remediation phase: May 2002 until July 2006
Passive remediation phase: The passive phase is completed. Realization period July 2006 until May 2007
Added reports:

In-situ remediation technique:

Case detailed information

General information
Project name: Eindhoven (Marconiplein): Mineral oil and BTEX*** Case submitted by: BioSoil Contact: Mw. C. v.d. Steenhoven Address: Nijverheidsweg 27 3341 LJ Hendrik Ido Ambacht Telephone number: +31 (0)78-682 01 40 Email-address: c.vandesteen@biosoil.com
Location
Country: The Netherlands City/region/county: Eindhoven, Noord-Brabant (future) use of location: Roundabout Built-up location during the active remediation phase?: No
Technique
In situ saneringstechniek:
Explanation technique: Also other remediation techniques applied?: Yes, subsurface purification system for groundwater and excavation After care needed?: Yes Rationale for the chosen technique: The location (busy roundabout) needed to remain usable. Aerobic biological degradation was applied since the contamination was present up to -24 m.
Contamination
Treated contaminant(s): Mineral oil Volatile aromats, including benzene (BTEX) Contaminant phase: Soil/pure product and groundwater Size contamination: 4300 m3(soil); 3600 m3 (groundwater) Depth contamination: 24 m below surface
Soil
Soil type: Mainly sand Saturated/unsaturated zone?: Saturated zone and unsaturated zone Permeability: > 0,1 m/day, based on field data Flow velocity or gradient groundwater:
Result, duration, expense
Remediation goal: Stable end situation Remediation goal achieved?: Yes Initial and final concentration and load removal: Mineral oil initial concentration: 2100 µg/l; final concentration: < 325 µg/l(almost all monitoring wells < 50µg/l) BTEX initial concentration: 2320 µg/l; final concentration: Below T-value for all components Active remediation phase: May 2002 until July 2006 Passive remediation phase: The passive phase is completed. Realization period July 2006 until May 2007 Total costs passive/after care phase: € 320.000,- Total costs active phase:
Stakeholders
Problem owner: Contractor: BioSoil Remediation plan: BioSoil Remediation research: Grontmij Competent authority: SRE Milieudienst Eindhoven Contact information stake holders:
Additional information
Lessons learned: Since the concentrations of groundwater contamination declined less than expected, the system was expanded in 2005 by one filter. In 2006 hydrogen peroxide was dosed to optimize the oxygen supply. Remarks
Related techniques and HIP-pilots
Related HIP-pilots: