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NEW OSHA Cr6+ PEL ANNOUNCED OSHA has announced the new Cr6+ PEL, (http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=NEWS_RELEASES&p_id=12038), published in the Federal Register, February 28, 2006. The new OSHA Cr6+ PEL (permissible exposure limit) lowers the upper limit for exposure of workers to hexavalent chromium (as Cr6+) to 5 µgm m-3 from its previous 52 µgm m-3, measured as 8-hour time-weighted averages. This drastic reduction affects any industrial process that could generate Cr6+ air emissions, including hard chrome plating, chromic acid anodizing, priming and painting, chromate conversion, welding, and rework of materials containing chromium. The limit applies to all forms of Cr6+, including chromium trioxide, chromic acid and chromates. The PEL action level, which is the threshold that determines when ongoing monitoring is necessary, is 50% of the PEL or 2.5 µgm m-3. However, if Cr6+ concentrations are shown to be <0.5 µgm m-3 under all expected conditions, then the OSHA rule does not apply at all. For more detail see our information page on our OSHA Cr6+ rules page |
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