Flexible and Dynamic Site Investigation

Abstract

In earlier times only monitoring wells were available for the detection of the extension of a dissolved plume. Groundwater was extracted and pumped to the soil surface. Recently, several new techniques have become available for sampling groundwater. These techniques can reach depths of about 30 to 50 m and even 100 m, depending on the mechanical resistance of the soil’s layers. One of these new techniques is the Groundwater Sampling Probe (GSP). The technique is based on the so called Cone Penetration Test (CPT) and dissolved plumes located at greater depths can be characterised. Application of this technique delivers a representative sample, which can be analysed directly on site. On-line, on site screening makes it possible to carry out the site investigation in a more or less interactive manner. Such a process of investigation saves time, is more reliable and saves money.