Abstract: “Spillage of petroleum products in soil, rivers and lakes is a problem since the advent of the petroleum era. Contamination of groundwater is one of the most important hazard of spill because it is a threat to animals, plants as well as human life. Fingerprinting of oil spills plays an important role in order to select the best treatment and cleanup method. Factors such as penetration depth of the oil into the soil, type of oil and polluted soil and the age and degree of contamination determine the efficiency of soil remediation. In this study, an experimental model was used to investigate the movement of a hydrocarbon liquid such as diesel oil and gasoline in soil where crushed limestone was the soil medium. A plexiglass cylinder with three ports at three different depths (in order to collect samples) was constructed. It was filled with crushed limestone. The design enabled to collect samples, analyze them and understand the mechanism of contaminant downward movement. Samples were coll”

Keywords: fingerprinting, NAPL, contamination, fingering