Case submitted by: NTP Milieu
Country: The Netherlands
Built-up site?: Yes, the construction was being dismantled.
Soil type: Layered soil; clay/peat/sand
Follow-up required?: No
Treated contamination: CVOC
Medium contamination: Groundwater
Dimension contamination: 45.000 [m3]
Remediation goal:
Final concentration
PCE concentration: 20 µg/l
TCE concentration: 262 µg/l
Cis concentration: 10 µg/l
VC concentration: 2,5 µg/l
Load removal percentage: > 95%
Remediation goal achieved?: yes
Initial and final concentration or load removal:
Cis initial concentration: 1.700 µg/l; final concentration: < 10 µg/l
VC initial concentration: 700 µg/l; final concentration: 2,5 µg/l
Active remediation phase: Mei 2005 until juni 2006
Passive remediation phase:
Boekelo (Texoprint): CVOC ***
Summary
General information
Project name: Boekelo (Texoprint): CVOC ***
Case submitted by: NTP Milieu
Contact: De heer J.M. Wiggers
Address: Postbus 6280, 7503 GG Enschede
Telephone number: +31(0)53 4614905
Email-address: h.wiggers@ntp-enschede.nl
Location
Country: The Netherlands
City/region/county: Texoprint Boekelo, provincie Overijssel
(future) use of location: Living
Built-up location during the active remediation phase?: Yes, the construction was being dismantled.
Technique
Explanation technique:
Also other remediation techniques applied?: Yes, namely: Excavation of other partial locations with several soil contermanations and dismantle en removal of several silt basin.
After care needed?: No
Rationale for the chosen technique: Stimulated aerobic degradation is the best option for the degradation of CVOC (Cis and VC) in groundwater in a built-up site. Groundwater remediation through groundwater circulation and air sparging.
Contamination
Treated contaminant(s): CVOC
Contaminant phase: Groundwater
Size contamination: 45.000 [m3]
Depth contamination: 11 m below surface
Soil
Soil type: Layered soil; clay/peat/sand
Saturated/unsaturated zone?: Saturated zone
Permeability: > 0,1 m/day
Flow velocity or gradient groundwater: 1,1 m/km; 10 m/year
Result, duration, expense
Remediation goal:
Final concentration
PCE concentration: 20 µg/l
TCE concentration: 262 µg/l
Cis concentration: 10 µg/l
VC concentration: 2,5 µg/l
Load removal percentage: > 95%
Remediation goal achieved?: yes
Initial and final concentration and load removal:
Cis initial concentration: 1.700 µg/l; final concentration: < 10 µg/l
VC initial concentration: 700 µg/l; final concentration: 2,5 µg/l
Active remediation phase: Mei 2005 until juni 2006
Passive remediation phase:
Total costs passive/after care phase:
Total costs active phase: € 105.000 ,-
Stakeholders
Problem owner: Ter Steege Vastgoed BV
Contractor: NTP Milieu Enschede
Remediation plan: NTP Milieu Enschede
Remediation research: Grontmij
Competent authority: Gemeente Enschede
Contact information stake holders: De heer H. Wiggers NTP Milieu
Additional information
Lessons learned: No remarks, groundwater remediation was successful
Remarks:
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