Case submitted by: BAM Milieu
Country: The Netherlands
Built-up site?: Yes
Soil type: Layered soil; clay/peat/sand
Follow-up required?: No
Treated contamination: Chlorinated Volatile Organic Compounds (CVOC)
Medium contamination: Soil/pure product and groundwater
Dimension contamination: 50.000 [m3]
Remediation goal:
final concentration
PCE concentration: 40 μg/l
TCE concentration: 500 μg/l
cis-DCE concentration: 20 μg/l
vc concentration: 5 μg/l
Remediation goal achieved?: No, but based on the monitoring results, it is expected that the goal can be achieved in the future. The monitoring will continue.
Initial and final concentration or load removal:
PCE intial concentration: >100.000 μg/l ; final concentration: 1.060 μg/l
TCE intial concentration: >50.000 μg/l; final concentration: 7.038μg/l
cis-DCE inital concentration: >70.000 μg/l; final concentration: 15.381 μg/l
vc initial concentration: >5000 μg/l; final concentration 11,12 μg/l
Active remediation phase: 19/7/2004 until 18/10/2006
Passive remediation phase: The passive phase is not yet completed. Expected realization periode: 19/10/2006 until ?
Added reports:
IJlst: CVOC **
Summary
In-situ remediation technique: (Enhanced) natural attenuation, anaerobic
General information
Project name: IJlst: CVOC **
Case submitted by: BAM Milieu
Contact: dhr. ing. I.R. Cornelissen
Address: Postbus 85, 3370 AB
Telephone number: +31 (0)184 - 676 847
Email-address: info@bammilieu.nl
Location
Country: The Netherlands
City/region/county: Friesland
(future) use of location: Residence
Built-up location during the active remediation phase?: Yes
Technique
In situ saneringstechniek: (Enhanced) natural attenuation, anaerobic
Explanation technique: Injection of a shockload protamylasse by means of direct push
Also other remediation techniques applied?: Yes, excavation of the top soil and construction of protection layer ('leeflaag')
After care needed?: No
Rationale for the chosen technique: Heterogenous soil profile with clay, sand and peat, potential for biological degradation of CVOC and the wish to use a technique that causes low site disturbance.
Contamination
Treated contaminant(s): Chlorinated Volatile Organic Compounds (CVOC)
Contaminant phase: Soil/pure product and groundwater
Size contamination: 50.000 [m3]
Depth contamination: >40 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: 0,05 m/km
Result, duration, expense
Remediation goal:
final concentration
PCE concentration: 40 μg/l
TCE concentration: 500 μg/l
cis-DCE concentration: 20 μg/l
vc concentration: 5 μg/l
Remediation goal achieved?: No, but based on the monitoring results, it is expected that the goal can be achieved in the future. The monitoring will continue.
Initial and final concentration and load removal:
PCE intial concentration: >100.000 μg/l ; final concentration: 1.060 μg/l
TCE intial concentration: >50.000 μg/l; final concentration: 7.038μg/l
cis-DCE inital concentration: >70.000 μg/l; final concentration: 15.381 μg/l
vc initial concentration: >5000 μg/l; final concentration 11,12 μg/l
Active remediation phase: 19/7/2004 until 18/10/2006
Passive remediation phase: The passive phase is not yet completed. Expected realization periode: 19/10/2006 until ?
Total costs passive/after care phase:
Total costs active phase:
Stakeholders
Problem owner: Gemeente Wymbritseradiel
Contractor: BAM Milieu
Remediation plan: Grontmij
Remediation research: Grontmij
Competent authority: Provincie Fryslân
Contact information stake holders:
Additional information
Lessons learned:
Remarks: More info: Shock-load behandeling chloorkoolwaterstoffen-kern Nooitgedagt IJlst; Eindrapport SKB-project PT5400, Grontmij, TNO, BAM Milieu, Gemeente Wymbritseradiel, Provincie Fryslân en SKB, 22 november 2007
Related techniques and HIP-pilots
Related techniques: (Enhanced) natural attenuation, anaerobic
Related HIP-pilots: HIP-pilot Assessing stable end situation CVOC 1, HIP-pilot Assessing stable end situation CVOC 2, HIP-pilot Direct push shock load protamylasse – radius of influence and effect substrate, HIP-pilot Field comparison 2 substrates for anaerobic degradation CVOC, HIP-pilot Specific monitoring biological degradation