risk assessment of exposure to released btex in district 12 of tehran municipality for employees or shopkeepers and gas station customers

Owing to environmentally-destructive impact of aromatic hydrocarbons, such as benzene, benzene ethyl, toluene, and xylenes or btexs, these materials are classified as hazardous pollutants in the air. this study studies cancer and non-cancer risk in district 12 of tehran municipality, through these components for two groups of employees or storekeepers and gas station customers. by measuring pollutant concentrations along with doing related calculations, the areas and gas stations of the study area with the highest risk have been found. results show that station 7, located in zone 4, is one of the most dangerous spots in terms of cancer and non-cancer risk to employees or storekeepers in the area. additionally, there is no risk of non-cancerous disease for the customers, using these stations, during their lifetime. finally, the study proposes some solutions for making appropriate decisions, concerning the sustainable management plan.