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Related Activities
Technical Advisory Group A Technical Advisory Group (TAG) consisting of scientific and technical experts from government, industry, environmental organizations and consultant groups, was formed in December 1998 to act as a resource to Environment Canada for identifying and resolving issues of a scientific, technical and process nature that emerge from the implementation of the Categorization Program. The TAG has met several times since it was established. The TAG also assisted in establishing technical Working Groups (WG) used to assemble experts to provide advice and recommendations for specific issues or tasks as required. Technical Advisory Group Members
QSAR Workshop As recommended by the TAG, an international Workshop on Quantitative Structure Activity Relationships (QSARs) hosted by Environment Canada was held in Philadelphia in November 1999, to address the issue of predicting the properties and effects of chemicals based on structure. Since existing experimental persistence, bioaccumulation and ecotoxicity data are only available for a small number of the substances on the DSL, tools such as Quantitative Structure Activity Relationships (QSARs) may be used to predict these end points. Each QSAR has limitations in terms of reliability of the predictions and since there exist many types or classes of substances on the DSL, the selection of a QSAR and the use of expert judgment is important in categorizing substances, in particular “difficult substances” (e.g., pigments, polymers, ionic surfactants). Therefore, the identification of the most reliable methods is required. As a result, an international expert QSAR workshop involving 27 participants was organized by Environment Canada on November 11-12th, 1999, in Philadelphia, Pennsylvania, to address these challenges. Proceedings of the Workshop are now available from the Existing Substances Division. Inorganics Working Group (IWG) The IWG was responsible for recommending a practical approach for categorizing and screening inorganic substances on the DSL. A report was prepared that provides recommendations for categorization of inorganic substances relative to the criteria for persistence, bioaccumulation, in accordance with the Persistence and Bioaccumulation Regulations, and inherent toxicity to non-human organisms. The recommendations were considered in the development of the Guidance Document for the categorization of inorganic substances. Recommendations for conducting screening level risk assessments for inorganic substances were also provided by the IWG. The Findings and Recommendations from the Inorganic Working Group Report is available on the CD. To obtain a copy of the CD, please send a request to the following address: existing.substances.existantes@ec.gc.ca.
Disclaimer: Although care has been taken to ensure that the information found on this website accurately reflects the requirements prescribed in the Canadian Environmental Protection Act (1999), you are advised that, should any inconsistencies be found, the legal documents, printed in the Canada Gazette, will prevail. |
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