Abstract: With the rapid development of petrochemical industry, petrochemical pollutants from production process due to leakage, maintenance, accidents can penetrate into soil and ground water, and cause the contaminate of soil and ground water. Based on the comprehensive analysis of the existing data, the types of pollutants on the site were determined to be petroleum hydrocarbon 1,1,2-trichloroethane, 1,2,3-Trichloropropane and benzo[a] pyrene. By means of GMS and SURFER software simulation, a three-dimensional visualization model of polluted stratum media and characteristic pollution space was constructed. The results showed that the filling soil, silty clay and pebbles were polluted to different degrees, and the pollution plume extends along the direction of ground water flow field. The effects of lithology conditions on pollutant migration were comprehensively analyzed, which provided basis for pollution risk assessment, pollution prevention and remediation.

Key words: contaminated site, typical pollutant, migration and distribution, visualization model