Site Assessments / Siting / Site Surveying

Business Lines:

Soil and Groundwater Pollution Investigations

We have more the 25 years of experience in the field of site assessments, siting and site surveying dealing with contaminated soil, groundwater, water sediment or surface water, from a simple investigation to complicated in-situ remediation and/or Environmental Liability Transfer.

We have our own team of surveyors in the field.

(Geo-) Hydrological Investigations

  • Physical-chemical Investigations of Soil, Groundwater and Surface Water
  • Field Surveys and Inventories as well as Data Analysis
  • Modelling and Calculations of Groundwater Flows
  • Preparation of Water Balances
  • Geotechnical Investigations and Calculations concerning Stability
  • Soil Mapping and Fertilisation Advice            
  • Design of Groundwater Extraction Methods
  • Agricultural Aspects
  • Asbestos in Soil

Ecological Investigations

Methods of soil investigation

In the Netherlands we are certified for carrying out soil investigations, for oversight of remediation activities and for remediation activities itself. These certificates are:

SIKB BRL 1000 (investigation of building materials)

SIKB BRL 2000 (soil investigations)

SIKB BRL 6000 (oversight remediation activities)

SIKB BRL 7000 (remediation activities)


Borings and sampling

Boreholes will be made by hand (till around 8 m minus ground level and depending on local density and/or consistency of the ground) or by a drilling machine.

Field tests with the oil pan (oil-water-reaction) and/or PID (Photo Ionization Detector).

Undisturbed sampling of the soil with sampling tubes or mixed samples if required.

If required soil gas sampling.

Installation of piezometers for collecting of groundwater samples (and for measuring the groundwater levels for calculation of the direction of the groundwater flow).

Laboratory testing of ground and groundwater samples.

Also geophysical methods (such as for example ground radar) are used.

For deep groundwater pollutions with volatile organic compounds (VOCs) combined Cone Penetration Testing technologies (CPT) with the Membrane Interface Probe (MIP) can be used.