Assessment of Occupational Benzene Exposure in Petrol Filling Stations at Rangoon

Hein, Roma; Aung, B. U. Thein; Lwin, Ohn; Zaidi, S. H.

doi:10.1093/annhyg/33.1.133

The Annals of Occupational Hygiene

1989

DOI: 10.1093/annhyg/33.1.133

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Assessment of Occupational Benzene Exposure in Petrol Filling Stations at Rangoon

Roma Hein¹,

B. U. Thein Aung²,

Ohn Lwin³

et al.

Abstract: An occupational health survey was conducted on workers, who inhale petrol fumes which contain low concentrations of benzene, at petrol filling stations in the city of Rangoon, Burma. To evaluate the exposure to benzene, urinary phenol (which is a principal metabolite of absorbed benzene) was measured in workers at petrol filling stations and in a control group of healthy male adults. The survey revealed that the urinary phenol content of workers exposed to petrol fumes was significantly higher than that of wor… Show more

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Cohort study among workers exposed to benzene in China: II. Exposure assessment

Dosemeci

Li²,

Hayes

et al. 1994

American J Industrial Med

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This report describes a retrospective exposure assessment method used in a follow-up mortality study of workers exposed to benzene. The approach quantified historical exposure to benzene in a multi-industry, multicenter cohort, involving 672 factories in 12 cities in China. Historical exposure data were collected to obtain exposure information related to 1,427 work units (departments) and 3,179 unique job titles from benzene-producing or -using factories in which written records and other data sources were evaluated. The basic unit for exposure assessment was a factory/work unit/job title combination which was considered separately during each of seven calendar-year time periods between 1949 and 1987 for a total of 18,435 exposure assignments. Historical information collected to estimate exposure included benzene monitoring data; lists of raw materials and factory products, and the percentage of benzene in each; the total amount and dates of use of benzene or benzene-containing materials; use of engineering controls and personal protective equipment; and other available exposure information. Overall, 38% (ranging from 3% for the earliest periods to 67% for the last period) of the estimates were based primarily on benzene monitoring data. In the absence of job-specific benzene monitoring data for a given calendar period, measurement results or exposure estimates for similar jobs and/or other calendar periods were used in conjunction with other exposure information to derive estimates. Estimated exposure levels are presented by industries and occupations. The highest average exposures during 1949-1987 were observed for the rubber and plastic industry (30.7 ppm), and for rubber glue applicators (52.6 ppm).

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Cohort study among workers exposed to benzene in China: II. Exposure assessment

Dosemeci

Li²,

Hayes

et al. 1994

American J Industrial Med

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Determination of genetic damage and urinary metabolites in fuel filling station attendants

Rekhadevi

Mahboob

Rahman

et al. 2010

Environ and Mol Mutagen

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Fuel (diesel and petrol) constitutes a complex mixture of volatile flammable liquid hydrocarbons among them benzene (BZ), toluene (TOL), and xylene (XYL) are considered to be the most hazardous, predominantly BZ because of its carcinogenic potency. Exposure to these compounds may have an impact on the health of the exposed subjects. Hence, genotoxicity and quantitative analysis of these compounds was performed in blood and urine samples of 200 workers exposed to fuel in filling stations and compared to controls. The level of genetic damage was determined by micronucleus test (MNT) in buccal epithelial cells (BEC) and chromosomal aberrations (CA) assay in peripheral blood lymphocytes (PBL) of fuel filling station attendants (FFSA) and compared to a matched control group. Urine analysis for BZ and its metabolites, phenol (Ph), trans, trans-Muconic Acid (t, t-MA), and S-Phenyl Mercapturic Acid (S-PMA) was done in all the study subjects. The results of our study revealed that exposure to BTX in petrol vapors induced a statistically significant increase in the frequency of micronuclei (MN) and CA in the exposed subjects than in controls (P < 0.05). There was a significant rise in the levels of urinary BZ, Ph, t, t-MA, and S-PMA in the exposed subjects. Our study highlights the significance of MNT, CA, and urinary metabolites as potential biological exposure indices of genetic damage in FFSA. This study suggests the need for regular monitoring of FFSA for possible exposure to BTX as a precautionary and preventive step to minimize exposure and reduce the associated health risks.

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Evaluation of sister chromatid exchange and chromosomal aberration frequencies in peripheral blood lymphocytes of gasoline station attendants

Çelık

Akbaş

2005

Ecotoxicology and Environmental Safety

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Assessment of Occupational Benzene Exposure in Petrol Filling Stations at Rangoon

Cited by 10 publications

References 0 publications

Cohort study among workers exposed to benzene in China: II. Exposure assessment

Cohort study among workers exposed to benzene in China: II. Exposure assessment

Determination of genetic damage and urinary metabolites in fuel filling station attendants

Evaluation of sister chromatid exchange and chromosomal aberration frequencies in peripheral blood lymphocytes of gasoline station attendants

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