Conversion of RROHS permissible exposure values (PEVs) expressed in ppm


This bilingual computer-based tool makes it possible to access the permissible exposure values (PEVs) in Schedule 1 of the 2007 RROHS as well as the designations and remarks for each of the substances. It also allows conversion of the PEVs expressed in ppm for conditions other than 25°C and 760 mm of Hg (NTP conditions). Similar to the PELs of OSHA, the RELs of NIOSH and the TLVs® of the ACGIH®, the PEVs of the RROHS expressed in ppm are for 25°C and 760 mm of mercury. PEVs whose units are in mg/m3 or fibres/cm3 are invariable.

Daniel Drolet, chemist, IRSST


This file contains macros

On opening the file, you must absolutely:
  1. Save the file in your computer, and then close it..
  2. Open the Excel file that you have just saved.
  3. Turn on the macrosto allow the utility to work

The file doesn't seem to work?
Follow the steps below or open comment
this link to see how to change the security level for macros in Excel 2000-2003 (In french only)

  • The security/macros option for EXCEL parameters has deactivated them. You must modify the security/macros level.
  • Select the TOOLS menu, MACROS sub-menu, and the SECURITY sub-sub-menu and choose one of the following options: MEDIUM level or LOW level.
  • This change will take effect only after you have closed and restarted the Excel software.
* If you use Excel 2007, please follow the instructions on this link
* If you use Excel 2010, please follow the instructions on this link

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