A model biopile was constructed in a separate, insulated outdoor site. The biopile consisted of a 2.25m 2 area of treated soil ( as described previously ) pile on a heights 40-50cm, contain contaminated soil ( 100Kg ) was placed prismatic hold dug to a depth 0.5m and covered with straw to prevent water from evaporation and the soil input on the concreted layer representing pilling area and aid for collected of leaching water, The oxygenation of the pile was provided with an industrial aeration system through a perforated drainage-pipe network at two different depth of the soil pile.