Case submitted by: Heijmans Infra Techniek
Country: The Netherlands
Built-up site?: Yes
Soil type: layered soil; clay/peat/sand
Follow-up required?: Monitoring
Treated contamination: Volatile chloride hydrocarbons (CVOC)
Volatile aromats, including benzene (BTEX)
PAH’s, light (2 en 3-rings)
PAH’s, heavy (4, 5 en 6 rings)
Medium contamination: Soil/pure product and groundwater
Dimension contamination: 1000 soil m3
Remediation goal:
final concentration
BTEX 0,2/7,0/4,0/0,2 ug/l
Mineral oil <50 ug/l
Naphthalene
Remediation goal achieved?: No, as a result of the layered soil profile part of the contamination remained.
Initial and final concentration or load removal:
BTEX total initial concentration: max. 51300 ug/l; initial concentration: max. 6,1 ug/l
Mineral oil initial concentration: max. 5300; final concentration: max. 157 (once-only, remain <50)
Naphthalene initial concentration: max. 470 ug/l; final concentration: max. 1,1 ug/l
Active remediation phase: 01-04-99 until 01-04-08
Passive remediation phase: The phase is not yet completed.
Nijverdal (Smidsweg 100a):BTEX, PAH’s, naphthalene and mineral oil**
Summary
In-situ remediation technique: Air stripping, Multi-phase extraction, Pump & treat, Soil vapor extraction
General information
Project name: Nijverdal (Smidsweg 100a):BTEX, PAH's, naphthalene and mineral oil**
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: Nijverdal / Provincie Overijssel
(future) use of location: Residence and gas station
Built-up location during the active remediation phase?: Yes
Technique
In situ saneringstechniek: Air stripping, Multi-phase extraction, Pump & treat, Soil vapor extraction
Explanation technique:
Also other remediation techniques applied?: No
After care needed?: Monitoring
Rationale for the chosen technique: plan obbligation
Contamination
Treated contaminant(s): Volatile chloride hydrocarbons (CVOC)
Volatile aromats, including benzene (BTEX)
PAH’s, light (2 en 3-rings)
PAH’s, heavy (4, 5 en 6 rings)
Contaminant phase: Soil/pure product and groundwater
Size contamination: 1000 soil m3
Depth contamination: 1.5 m below surface soil / 17,0 m below surface groundwater m below surface
Soil
Soil type: layered soil; clay/peat/sand
Saturated/unsaturated zone?: Saturated zone
Permeability: 0,01-0,1 m/day, based on field data
Flow velocity or gradient groundwater:
Result, duration, expense
Remediation goal:
final concentration
BTEX 0,2/7,0/4,0/0,2 ug/l
Mineral oil <50 ug/l
Naphthalene
Remediation goal achieved?: No, as a result of the layered soil profile part of the contamination remained.
Initial and final concentration and load removal:
BTEX total initial concentration: max. 51300 ug/l; initial concentration: max. 6,1 ug/l
Mineral oil initial concentration: max. 5300; final concentration: max. 157 (once-only, remain <50)
Naphthalene initial concentration: max. 470 ug/l; final concentration: max. 1,1 ug/l
Active remediation phase: 01-04-99 until 01-04-08
Passive remediation phase: The phase is not yet completed.
Total costs passive/after care phase:
Total costs active phase:
Stakeholders
Problem owner: Provincie Overijssel
Contractor: Heijmans Infra Techniek
Remediation plan: Tauw
Remediation research:
Competent authority: Provincie Overijssel
Contact information stake holders:
Additional information
Lessons learned: LNAPL removal in a strongly layered soil profile is sometimes difficult.
Remarks:
Related techniques and HIP-pilots
Related HIP-pilots: HIP-pilot ‘Acoustic remediation’