Conclusion: In this report, the short-term benzene releases occurring due to tanker truck unloading of gasoline into storage tanks at gasoline stations and long-term releases of benzene from gasoline station total evaporative losses are estimated. For those living in the vicinity of the gasoline station, the incremental risks for tumourogenicity from long-term inhalation exposure to evaporative emissions of benzene from gasoline ranged from 3 to 32 per million population at a distance of 20 m from the gasoline station fenceline. Risk levels of 10 per million and above are of particular concern.