The Occupational Safety and Health Administration is expected to reduce permissible exposure limits ofhexavalent chromium from 100 mug/m3 between 5 to 0.5 mug/m3.
A Navy Industry Task Group study revealed that the impact of proposed regulations on the shipbuilding industry is significant.
The estimated cost of compliance by the Navy facilities could be as much as $46 Million/year besides a one-time cost ofabout $22 Million.
Also, the task group estimated that the cost of $9 Million.
This paper presents the results ofa study undertaken at the University of New Orleans in support of the Navy/Industry Task Group efforts.
The study included assessments of Cr (VI) exposure levels for two specific welding processes and three welding scenarios.
Airborne particulate matter was collected using personal samplers for two specific welding processes, Gas Metal Arc Welding and Flux-Cored Arc Welding.
Two base metals, HY100 and DH36, were considered for Flux-Cored Arc Welding and one base metal, HY100, was considered for Gas Metal Arc Welding.
The samples were analyzed for Cr (VI) using OSHA Method 215.
Based on the data generated, it can be concluded that Gas Metal Arc Welding and Flux-Cored Arc Welding on HY100 steel result in 8-hr. worker exposures less than 0.5 mug/m3 in a laboratory type setting, though the same levels of exposure may be difficult to be achieved in the field.
Flux-Cored Arc Welding on DH36 resulted in exposure above 0. 5 mug/m3, again in laboratory type setting.
Mots-clés Pascal : Construction navale, Chantier naval, Soudage arc, Exposition professionnelle, Chrome VI, Métal, Soudage gaz, Emission polluant, Propriété matériau, Etude expérimentale, Méthodologie, Résultat mesure, Concentration, Essai laboratoire, Réglementation
Mots-clés Pascal anglais : Shipbuilding, Shipyard, Arc welding, Occupational exposure, Chromium VI, Metal, Gas welding, Pollutant emission, Properties of materials, Experimental study, Methodology, Measurement result, Concentration, Laboratory test, Regulation
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0218084
Code Inist : 001D15F. Création : 16/11/1999.