Joint Interpretation of GPR Data and Results of Observation Wells Monitoring to Estimate the Ground Contamination Degree

In this paper practical results of the long-term (1999-2006) application of Ground Penetrating Radar (GPR) technique for estimation of electrical parameters of contaminated ground are presented. Contaminations were caused by oil product leakages from pipelines and oil storage objects. GPR technique includes a procedure of GPR profiling and application of Common-Midpoint (CMP) method. The GPR data allowed to acquire values of thickness of ground layers and their relative dielectric permittivity. These values were connected with the degree of ground contamination which was attested by measurements of a floating layer thickness of oil products in the observation wells and their concentration in the ground samples taken from these wells. Mentioned procedures were repeated during 8 years with the objectives to find steady time correlation of GPR data with ones acquired by attesting methods. The GPR data allowed also to monitor changes of oil product contaminant degree in the ground and to detect the place of oil leakage from buried pipeline. The GPR data were acquired in 2006 for one of studied sites show the values of ground contamination degree increased in comparison with 2005 from 2.8% up to 49% for different observation wells.