Summary

Case submitted by: Groundwater Technology BV
Country: The Netherlands
Built-up site?: Yes
Soil type: Layered soil; clay/peat/sand
Follow-up required?: No
Treated contamination: Mineral oil
Volutare aromatics, including benzeen (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: 7500 m3
Remediation goal: Stable end situation
Remediation goal achieved?: Yes
Initial and final concentration or load removal:
Mineral oil intitial concentration: 11000 mg/kg ; final concentration: 50 mg/kg
Total initial load: 30000 kg; total final load: 675 kg

Mineral Oil in groundwater initial concentration: 9400 ug/l ; final concentration: < 50 ug/l
total initial load: 33kg; total final load: 0 kg
BTEX in soil initial concentration: 27 mg/kg ds; final concentration: 0 mg/kg ds
BTEX in groundwater initial concentration: 12000 ug/l; final concentration: 0,9 ug/l
total initial load: 43kg; total final load: 0 kg
Active remediation phase: 01/06/2001 until 01/06/2004
Passive remediation phase: The passive phase is completed. Realization period:01/06/2004 until 01/07/2004
Added reports:

Case detailed information

General information
Project name: Bergen op Zoom (busstation): Mineral oil, BTEX en PAH's*** Case submitted by: Groundwater Technology BV Contact: Yvo Veenis Address: Postbus 12115 3004 GC Rotterdam Telephone number: +31 (0)10-2382850 Email-address: info@gtbv.nl
Location
Country: The Netherlands City/region/county: Noord-Brabant (future) use of location: Public transportation Built-up location during the active remediation phase?: Yes
Technique
Explanation technique: The remediaton contained: Excavation of several contarmination sources Groundwater level lowering (pump & treat) Extracting soil air for stimulation of aerobe biological degradation Compressed air injection in de saturated zone for stimulation of aerobe biological degradation Also other remediation techniques applied?: Excatavation of two contarmination sources. After care needed?: No Rationale for the chosen technique: Because of the local situation: NS-railwaytracks leading to/from the platforms from station Bergen op Zoom and the regional bus station complete remediation was only possible through in situ measures. The contamination (petroleum) is biological (aeroob) well degradable. Considering several options the combination of partly excavating during the construction of the in situ systeem, groundwater extraction and compressed air injection is the most costefficient solution within the precondition from the costumer. ISCO is later in de sanering set in for accelaration of the remediation for a few recalcitrant subsector. Tijdens de uitvoering kwam een niet eerder bekende verontreiniging met PAK aan het licht. Deze is ontgraven
Contamination
Treated contaminant(s): Mineral oil Volutare aromatics, including benzeen (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: 7500 m3 Depth contamination: 5 m below surface
Soil
Soil type: Layered soil; clay/peat/sand Saturated/unsaturated zone?: Saturated and unsaturated zone Permeability: 0,01-0,1 m/day 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 intitial concentration: 11000 mg/kg ; final concentration: 50 mg/kg Total initial load: 30000 kg; total final load: 675 kg Mineral Oil in groundwater initial concentration: 9400 ug/l ; final concentration: < 50 ug/l total initial load: 33kg; total final load: 0 kg BTEX in soil initial concentration: 27 mg/kg ds; final concentration: 0 mg/kg ds BTEX in groundwater initial concentration: 12000 ug/l; final concentration: 0,9 ug/l total initial load: 43kg; total final load: 0 kg Active remediation phase: 01/06/2001 until 01/06/2004 Passive remediation phase: The passive phase is completed. Realization period:01/06/2004 until 01/07/2004 Total costs passive/after care phase: Total costs active phase: € 520.000,-
Stakeholders
Problem owner: SBNS (Chris van de Meene) Contractor: Groundwater Technology BV (Yvo Veenis) Remediation plan: SGS Remediation research: SGS Competent authority: Provincie Noord Brabant Contact information stake holders:
Additional information
Lessons learned: This was one of the first remediation plans based on contracted out on UAV-GC. The relation between contracter, problem owner and consultant is essentialy diffrent from regular assignments. Remarks:
Related techniques and HIP-pilots
Related HIP-pilots: