抄録
The authors have developed the original risk assessment model for soil contamination caused by mineral oils. The exposure rates, the distribution of exposure paths and the risk level of gasoline, kerosene and diesel oil have been evaluated by using Geo-environmental Risk Assessment System (GERAS-1). The major exposure pathways to the human of gasoline and kerosene are the air inhalation, whereas they are mainly exposed to diesel oil from air inhalation, groundwater intake and crops intake. The major components of total petroleum hydrocarbon (TPH) involved in the exposure were aliphatic TPH (C5-C8) for gasoline, aliphatic TPH (C7-C12) for kerosene, and aliphatic TPH (C7-C16) and aromatic TPH (C7-12) for diesel oil. The soil contents of total TPH for exposure limits are estimated at following levels, 14 (sandy soil)-38 (loamy soil) mg/kg for gasoline, and 1400 (sandy soil)-3400 (loamy soil) mg/kg for kerosene, and 540 (sandy soil)-1300 (loamy soil) mg/kg for diesel oil.
