Permissible Exposure Limit (PEL) 12 : Time-weighted average concentrations that must not be exceeded during any 8-hour work shift of a 40-hour workweek
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Madison County North Carolina Government, Madison County Emergency Operations Plan Glossary (Section 2: General Terms), NC, USA 2009. http://www.madisoncountync.org/eop/Madison_EOP_PDF /Glossary.pdf, (CBRNEmr - Amer) {874}