00000nam 2200000za 4500 9.867364 CaOODSP 20221107162307 cr ||||||||||| 190118s1996 onc #o||||f000 0|eng d CaOODSP eng n-cn--- En42-17/5-1-1997E-PDF Canada. Environment Canada. Federal-Provincial Working Group on Air Quality Objectives and Guidelines. A protocol for the development of national ambient air quality objectives [electronic resource] : part 1, science assessment document and derivation of the reference level(s) : a report / by the Federal-Provincial Working Group on Air Quality Objectives and Guidelines. Toronto : Environment Canada, 1996. iii, 49 p. Digitized edition from print [produced by Environment and Climate Change Canada]. Co-published by: Health Canada. Includes bibliographical references. "National Ambient Air Quality Objectives (NAAQO) are benchmark levels of protection for people and the environment in Canada. The criteria for their development and use must be based on scientifically defensible evidence while incorporating a margin of protection that reflects three factors: variability in the levels of exposure and their associated effects; uncertainty in the analysis, and the values of Canadian society. This document explains how scientific information is obtained, evaluated, and published in support of NAAQOs"--Introd. Issued also in print format. gccst Air quality gccst Air pollution gccst Environmental impact assessment Canada. Health Canada. A protocol for the development of national ambient air quality objectives part 1: science assessment document and derivation of the reference level(s) (CaOODSP)9.646565 PDF 21.18 MB https://publications.gc.ca/collections/collection_2019/eccc/En42-17-5-1-1997-eng.pdf