CCPTU

The dielectrical parameters of the soil, the electrical conductivity and the electrical permittivity vary predominantly with the soils water content and the presence of contaminations with hydrocarbons. Furthermore, electrical conductivity is inversely proportional to particle size. That is, clays usually have higher conductivity than sands. Another rule of thumb is the smaller the particle size of the soil, the lower the permeability. Thus, electrical conductivity measurements yield important lithological information and identify the locations the may be permeable and non-permeable zones. By measuring these parameters between two insulated electrodes using the soil mass as dielectric correlated with CPT results as tip resistance and local sleeve friction the contamination by hydrocarbons can be determined.