Monitoring of organic contaminants in the subsurface is of great importance to protecting water resources and to design suitable remediation strategy.Because the contaminants hidden in the soil and since the subsurface is highly heterogeneous, monitoring of the contaminants is a challenging task. Geophysical methods are sensitive to the subsurface properties, they provide a non-invasive spatial map of it, and hence they hold a great promise in monitoring contaminants. Efficiently use of these methods requires an understanding of the relation between the measured geophysical signature and the subsurface properties of interest. In soil and sediments, organic contaminants are mostly interacts with organic matter (OM). Hence, understanding how the interactions between OM and organic contaminants affect geophysical signature is the main objective of this work. Ultimately, this research will advance our understanding of the influence of organic contaminants on the geophysical signature of soil and will promote the applications of those methods.