EXPOSURE AND RISK ASSESSMENT OF AROMATIC TPH BY GEO-ENVIRONMENTAL RISK ASSESSMENT SYSTEM (GERAS-1)

Abstract

The exposure rates, the distribution of exposure paths and the risk level of aromatic TPH have been evaluated by using Geo-environmental Risk Assessment System. The major exposure paths to the human are different due to the kind of the oil contents. The human are mainly exposed to aromatic TPH (C6-C12) from inhalation of indoor air, groundwater intake and crops intake, whereas they are mainly exposed to TPH (C13-C21) from groundwater intake and crops intake. On the other hand, the main exposure paths of TPH (C22-C35) are direct ingestion of soil and crops intake. The soil contents of exposure limit are estimated at 0.2-0.7 mg/kg for TPH (C6) and 30-200 mg/kg for TPH (C7-C35).