Occupational Exposure Estimate of Benzene and the Effectiveness of Control Measure in Gabon’s Gasoline Storage and Distribution Facility

Antoine Francis Obame Nguema, Akihiro Tokai, Ibnu Susanto Joyosemito, Naoya Kojima

Abstract


The processing of petroleum products in gasoline storage and distribution facility for loading operation, has caused the generation of vapor emissions sources. Benzene is one of those vapor emissions that workers are likely to be exposed at high exposure level during conducting out specific tasks such as loading gasoline to various petroleum storage transport modes. This results in many problems on human health such as cancer and non-cancer diseases. However, the estimate of benzene exposure to indicate the control measures has not been fully explored in previous researches. In this study, the occupational exposure estimate of benzene in Gabon’s gasoline storage and distribution facility was investigated by using a quantitative and predictive exposure inhalation model; to estimate benzene concentration before and after applying control measures. The results indicate that the benzene concentrations varied between 9.46 mg/m³ and 187 mg/m³ for short term and has the value of 187 mg/m³ for long term. The implementation of control measures including using vapor recovery system, chemical filter mask and improving worker’s behavior might contribute to significantly reduce benzene concentration to the range of 4.52 – 29.08 mg/m³ for short term and down to 4.55 mg/m³ for long term. This almost meets the Agency Governmental Industrial Hygienists standard, in which occupational exposure limit for short term and long term exposure is 8.1 mg/m³ and 3.16 mg/m³, respectively.

Keywords


Benzene exposure, Task-level assessment, Control measures, Loading operations, Gasoline storage and distribution facility

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DOI: https://doi.org/10.24203/ajas.v6i6.5642

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