Environmental and biological assessment of exposure to benzene in petroleum workers.
Occupational exposure to benzene was measured in two gasoline marketing terminals and five major refineries in Singapore.
A total of 280 workers were monitored over two year.
This assessment was carried out with two primary objectives : (1) To find out the extent of occupational exposure to benzene in the petroleum industry in Singapore, (2) To identify suitable biomarkers for monitoring of low levels of benzene exposure.
The exposure was measured in five different categories of petroleum and petrochemical workers, i.e., truck drivers, despatch assistant, process operators, oil movements operators and laboratory technicians.
The results revealed wide variations in exposure, from 0.01 to 13.6 ppm for personal time weighted average (TWA) exposure over the whole workshift.
The exposure of truck drivers appeared to be the highest, with geometric mean (GM) of 1.98 ppm (ranged from 0.25 to 13.6 ppm).
The average benzene exposure for process operators was relative low with a GM of 0.04 ppm.
Lowest benzene exposure was found in the laboratory technicians, with a GM of 0.02 ppm.
As cigarette smoking is known to affect metabolism of benzene, data analyses on the relationships with environmental exposure were conducted only on the 190 nonsmokers. (...)
Mots-clés Pascal : Benzène, Industrie pétrolière, Exposition professionnelle, Médecine travail, Homme, Singapour, Asie, Surveillance biologique, Urine, Poste travail, Sang, Liquide biologique, Marqueur biologique
Mots-clés Pascal anglais : Benzene, Oil industry, Occupational exposure, Occupational medicine, Human, Singapore, Asia, Biological monitoring, Urine, Workplace layout, Blood, Biological fluid, Biological marker
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 97-0391085
Code Inist : 002B03L06. Création : 12/09/1997.