Case submitted by: NTP Milieu
Country: The Netherlands
Built-up site?: No
Soil type: Mainly sand
Follow-up required?: Yes, monitoring
Treated contamination: Mineral oil, volatile aromats, including benzene (BTEX), PAK’s, light (2 en 3-rings), PAK’s, heavy (4, 5 en 6 rings),naphthalene and creosote
Medium contamination: Soil/pure product and groundwater
Dimension contamination: 500.000 m3 treated area 75.000 [m3]
Remediation goal:
Stable eindsituation; finla concentration:
Benzene concentration: 0,2µg/l
Toluene concentration: 7 µg/l
Ethylbenzene concentration: 4 µg/l
Xylenes concentration: 0,2 µg/l
Naphthaleen concentration: 7 µg/l
Anthracite concentration: 2,5 µg/l
Mineral oil < C20 concentration: 100 µg/l
Mineral oil C20-C40 concentration: 300 µg/l
Remediation goal achieved?: No, sanering stil in progress
Initial and final concentration or load removal:
Benzene initial concentration: 2.000 µg/l
Toluene initial concentration: 2.000 µg/l
Ethylbenzeen initial concentration: 2.000 µg/l
Xylenes initial concentration: 4.000 µg/l
Naphthalene initial concentration: 160.000 µg/l
Anthracite initialconcentration: 8.000 µg/l
Mineral oil < C20 initial concentration: 119.700 µg/l
Mineral oil C20-C40 initial concentration: 16.200 µg/l
Active remediation phase: October 2007 until present day
Passive remediation phase:
Added reports:
referentieproject kijksteeg Lochem.pdf
Lochem: mineral oil,BTEX,PAH,naphthalene,creosote ***
Summary
In-situ remediation technique: (Enhanced) natural attenuation, aerobic, Air stripping, In situ chemical Oxidation (ISCO), Multi-phase extraction, Soil vapor extraction
General information
Project name: Lochem: mineral oil,BTEX,PAH,naphthalene,creosote ***
Case submitted by: NTP Milieu
Contact: De heer G.B.J. Borggreve
Address: Postbus 6280 7503 GG Enschede
Telephone number: +31 (0)53 461 49 05
Email-address: g.borggreve@ntp-enschede.nl
Location
Country: The Netherlands
City/region/county: Lochem, Provincie Gelderland
(future) use of location: Forest
Built-up location during the active remediation phase?: No
Technique
In situ saneringstechniek: (Enhanced) natural attenuation, aerobic, Air stripping, In situ chemical Oxidation (ISCO), Multi-phase extraction, Soil vapor extraction
Explanation technique: ISCO by Fentons reagent
Also other remediation techniques applied?: Soil remediation with LNAPL removal in the source
After care needed?: Yes, monitoring
Rationale for the chosen technique: Most appropriate techniques for addressing this contamination
Contamination
Treated contaminant(s): Mineral oil, volatile aromats, including benzene (BTEX), PAK’s, light (2 en 3-rings), PAK’s, heavy (4, 5 en 6 rings),naphthalene and creosote
Contaminant phase: Soil/pure product and groundwater
Size contamination: 500.000 m3 treated area 75.000 [m3]
Depth contamination: 30 m below surface
Soil
Soil type: Mainly sand
Saturated/unsaturated zone?: Saturated zone
Permeability: > 0,1 m/day, based on groundwater map
Flow velocity or gradient groundwater: 30 m/jaar; 0,33 m/km
Result, duration, expense
Remediation goal:
Stable eindsituation; finla concentration:
Benzene concentration: 0,2µg/l
Toluene concentration: 7 µg/l
Ethylbenzene concentration: 4 µg/l
Xylenes concentration: 0,2 µg/l
Naphthaleen concentration: 7 µg/l
Anthracite concentration: 2,5 µg/l
Mineral oil < C20 concentration: 100 µg/l
Mineral oil C20-C40 concentration: 300 µg/l
Remediation goal achieved?: No, sanering stil in progress
Initial and final concentration and load removal:
Benzene initial concentration: 2.000 µg/l
Toluene initial concentration: 2.000 µg/l
Ethylbenzeen initial concentration: 2.000 µg/l
Xylenes initial concentration: 4.000 µg/l
Naphthalene initial concentration: 160.000 µg/l
Anthracite initialconcentration: 8.000 µg/l
Mineral oil < C20 initial concentration: 119.700 µg/l
Mineral oil C20-C40 initial concentration: 16.200 µg/l
Active remediation phase: October 2007 until present day
Passive remediation phase:
Total costs passive/after care phase:
Total costs active phase: € 712.000,-
Stakeholders
Problem owner: Provincie Gelderland
Contractor: NTP Milieu Enschede
Remediation plan: Oranjewoud
Remediation research: Oranjewoud
Competent authority: Provincie Gelderland
Contact information stake holders: De heer G.B.J. Borggreve, NTP Milieu Enschede
Additional information
Lessons learned: There was more pure product in the soil than expected based on the research. A lot of pure product is possibly accumulating in the monitoring wells which limits the interpretation of the results.
Remarks:
Related techniques and HIP-pilots
Related techniques: (Enhanced) natural attenuation, aerobic, Air stripping, In situ chemical Oxidation (ISCO), Multi-phase extraction, Soil vapor extraction
Related HIP-pilots: HIP-pilot ‘Acoustic remediation’, HIP-pilot Optimizing ISCO for CVOC