In this study we have measured exposure levels to quartz in different parts of the slate industry in Alta, Northern Norway.
Full shift personal samples were collected from the breathing zones of outdoor and indoor workers in the slate quarries and a slate factory.
The quartz content of respirable dust was between 7 and 41%. The slate factory had the lower quartz levels although 41% of total and 73% of respirable samples were above the Norwegian TLV for quartz.
The average concentration of total quartz in the slate factory was 0.27 mg/m3 and the average concentration of respirable quartz was 0.12 mg/m3.
Outdoor in the quarries the average levels of quartz were 0.58 and 0.13 mg/m3 for total and respirable quartz, respectively.
From the beginning of the last decade most of the quarry-workers have built quarry halls to protect themselves against a cold winter climate.
Inside in these quarry halls the average levels were 1.74 mg/m3 total quartz and 0.46 mg/m3 respirable quartz.
Assessment of historical exposure showed that 32 of totally 45 quarry workers with available exposure history had a lifetime inhaled quartz dose of more than 10 g. There is reason to fear that silicosis will be an increasing problem among quarry workers if efforts to reduce quartz exposure are not put into effect.
Mots-clés Pascal : Industrie extractive, Norvège, Europe, Ardoise, Teneur air ambiant, Quartz, Lieu travail, Analyse quantitative, Analyse chimique, Poste travail, Carrière, Ciel ouvert, Etude comparative, Silicose, Exposition professionnelle, Médecine travail, Homme
Mots-clés Pascal anglais : Mining industry, Norway, Europe, Slate, Ambient air concentration, Quartz, Work place, Quantitative analysis, Chemical analysis, Workplace layout, Quarry, Open cut, Comparative study, Silicosis, Occupational exposure, Occupational medicine, Human
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0067868
Code Inist : 001D16C06. Création : 31/05/1999.