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Julian Carter——Works at the European Space Agency, Lives in Paris, France.
Time-Weighted AverageA Permissible Exposure Limit (PEL) is the maximum amount or concentration of a chemical that a worker may be exposed to under OSHA regulations. A Time-Weighted Average (TWA) is explained below. A VPEL or Vacated PEL is an older PEL set by OSHA but later "vacated" (retracted) under court order.Aug 10, 2016read more >>+119962023-06-12 09:59:52
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