Technical Bulletin Respecting Updates to the Guidelines for Canadian Drinking Water Quality

Health Canada recently updated the Canadian Drinking Water Quality Guidelines (October 2014), which included revised guidelines for ethylbenzene and xylenes.  As a result of these changes, Atlantic PIRI revised the Tier I and II screening level tables in Appendix 3 and 4 (January 2015).

The purpose of this technical bulletin is to provide step-by-step guidance on updating the Chem/Tox database in the Atlantic RBCA toolkit.  Specifically, Site Professionals will be responsible for updating the “Chem/Tox” database in the toolkit when carrying out Tier II Site Specific Target Level (SSTL) calculations for soil leaching to groundwater for potable water sites until the Toolkit has been upgraded.