Distribution of airborne btex concentrations within petrol stations

Distribution of airborne btex concentrations within petrol stations


English :
Gasoline evaporation during fueling is thought to be an emitting source of many VOCs found within a petrol station. These VOCs can affect the comfort and health of customers even those who are not in the immediate vicinity of the fuel dispensers. This study intends to characterize the distributions of BTEX concentrations over the area of two petrol stations. The measured concentrations and sampling positions are input to the land development program to create isoconcentration contour plots. Additionally, a B/T ratio is used for assessing a spatial pattern of the concentrations that was influenced by the gasoline evaporation source. Results show that benzene was found to be highest with the average concentration of 219 and 153 μg/m in Stations A and B, respectively. The highest concentrations are found at the fuel dispenser area and fill points for underground fuel tanks. The B/T ratio indicates that Station B may be influenced by emission sources other than gasoline evaporation.