To validate exposure estimates used to investigate correlations between exposure and cancer risk, 1678 personal measurements were collected for 46 job titles during 73 day shifts at a bleached-kraft pulp mill.
Measurements included shift-long average and short-term exposures to carbon monoxide, chlorine dioxide (ClO2), and hydrogen sulfide ; and shift-long average exposures to calcium oxide and wood dust (WD).
Overall results indicate low levels of exposure with a few noteworthy exceptions.
Although ClO2 was the exclusive bleaching agent, 77 area samples indicated that chlorine (Cl2), not ClO2 was present in all areas apart from the chemical preparation area (chem-prep) and during a pulp spill.
The highest shift-long exposures to Cl2 were measured in the chip yard and are attributed to uncontrolled stack emissions.
Finally, WD samples collected from several laborers significantly exceeded regulatory limits, with the highest exposures measured in the steam and recovery area.
For short-term exposures to ClO2 in chem-prep, 12 of 17 data-logging electro-chemical sensor sample results showed at least one peak that exceeded the short-term exposure limit of 0.3 ppm.
The use of data-logging equipment quantified short-term exposures that previously had been characterized only anecdotally.
The peaks were correlated with tasks and upset conditions and, given their transient nature, these exceedances could not have been detected using shift-long average-based sampling devices. (...)
Mots-clés Pascal : Colombie britannique, Canada, Amérique du Nord, Amérique, Industrie papier, Exposition professionnelle, Hygiène travail, Homme, Tumeur maligne, Analyse risque, Echantillonnage, Carbone monoxyde, Chlore dioxyde, Hydrogène Sulfure, Calcium Oxyde, Poussière
Mots-clés Pascal anglais : British Columbia, Canada, North America, America, Paper industry, Occupational exposure, Occupational hygiene, Human, Malignant tumor, Risk analysis, Sampling, Carbon monoxide, Chlorine dioxide, Hydrogen Sulfides, Calcium Oxides, Dust
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 98-0488722
Code Inist : 001D16C06. Création : 19/02/1999.