investigation. The MIP probing has helped to identify two migration zones through
which the contamination of ClE is spreading. A revelation of a lower contaminated
zone (below 15 m bgs) was an important finding because the depth of all historical
monitoring wells within the area reached only 10 m bgs. Therefore, the extent of this
contamination was unclear before the MIP tool was employed. The typical MIP log
from this site is depicted in Fig. 31.3.
As mentioned earlier, the data obtained from several MIP probes can be interpolated and serve as a valuable model of contamination. For example, cuts through the
contamination plume can identify the source zones of the contamination and help to
direct the injection of the oxidizing agent. One of the profiles from the same site is
shown in Fig. 31.4. Probing was performed in the area contaminated with both
BTEX and chlorinated solvents.
The data obtained from large MIP investigation can represent a valuable source
for creation of 3D models of contaminated sites. Models of contamination plumes
can significantly help to estimate the total amount of contaminants and reveal
potential sources zones or migration paths. The large MIP investigation performed
on the site of an old dump near Opava, a town in the Czech Republic, is supposed to
be a good example of using a 3D model (Fig. 31.5). The survey has significantly
helped to understand the extent of the contaminated area and also distinguish
between different kinds of pollution. This model has served well in designing a
spatial distribution of wells and sampling points. After such characterization the site
Fig. 31.3 Typical example of MIP log from the Czech Republic site shows contamination with
chlorinated solvents in upper and lower aquifer. The first column represents electric conductivity
(EC), followed by signals (mV) of PID, FID, and XSD detector. Simplified geological formations
match well with EC values, and the transitions zones (e.g., sand/clay, gravel/sand) are well visible
622
V. Knytl
which the contamination of ClE is spreading. A revelation of a lower contaminated
zone (below 15 m bgs) was an important finding because the depth of all historical
monitoring wells within the area reached only 10 m bgs. Therefore, the extent of this
contamination was unclear before the MIP tool was employed. The typical MIP log
from this site is depicted in Fig. 31.3.
As mentioned earlier, the data obtained from several MIP probes can be interpolated and serve as a valuable model of contamination. For example, cuts through the
contamination plume can identify the source zones of the contamination and help to
direct the injection of the oxidizing agent. One of the profiles from the same site is
shown in Fig. 31.4. Probing was performed in the area contaminated with both
BTEX and chlorinated solvents.
The data obtained from large MIP investigation can represent a valuable source
for creation of 3D models of contaminated sites. Models of contamination plumes
can significantly help to estimate the total amount of contaminants and reveal
potential sources zones or migration paths. The large MIP investigation performed
on the site of an old dump near Opava, a town in the Czech Republic, is supposed to
be a good example of using a 3D model (Fig. 31.5). The survey has significantly
helped to understand the extent of the contaminated area and also distinguish
between different kinds of pollution. This model has served well in designing a
spatial distribution of wells and sampling points. After such characterization the site
Fig. 31.3 Typical example of MIP log from the Czech Republic site shows contamination with
chlorinated solvents in upper and lower aquifer. The first column represents electric conductivity
(EC), followed by signals (mV) of PID, FID, and XSD detector. Simplified geological formations
match well with EC values, and the transitions zones (e.g., sand/clay, gravel/sand) are well visible
622
V. Knytl