Benzene Exposure at Gasoline Stations: Health Risk Assessment

ABSTRACT

This study aimed to assess the health risk of benzene exposure among gasoline stations workers. There were 98 workers from each zone of gasoline station in Muang Khon Kaen,Thailand. The benzene concentrations were monitored via personal air sampling and analyzed with a gas chromatography flame-ionization detector (GC-FID). Information about adverse symptoms were obtained by an interview questionnaire. Levels of health risk were calculated from the likelihood level of exposure and the adverse symptoms level, which were summarized in a risk matrix. Most workers had experienced adverse symptoms related to benzene toxicity (68.4%). The health risk of benzene exposure was higher than an acceptable level in 15.3% of workers and in a similarly proportion of fueling workers and cashiers. Moreover, the proportion of risk group was found highest in urban zone (18%) and the risk scores had a significant difference across all zones. This study showed that over 15% of workers were under health risk conditions on benzene exposure and over 60% of workers had experienced adverse symptoms related to benzene toxicity. Therefore, findings suggest the need of the health surveillance program and safety training for workers to increase awareness of benzene exposure.

Key Words:

• workers
• adverse symptom
• likelihood
• benzene
• risk