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Interim soil quality criterion

A national ecological framework has been developed for Canada to encourage a more comprehensive approach to monitoring and reporting on the environment (Marshall and Schut 1999). Using various levels of ecoclassification, this framework identifies differences in ecological processes and character of a region (e.g., from the influence of agriculture on Prairie grasslands to the urban development of southern Ontario). Regional differences were considered for uranium content in stream geochemical surveys conducted across Canada, as well as in sediment or soil data for Quebec, Manitoba, Saskatchewan, and the Yukon. Data representing background or ambient concentrations of total uranium in the Canadian environment are presented for air, surface water, sediments, drinking water, soil, dust, groundwater, biota, and biota used as human food. Where available, data on naturally occurring anomalous concentrations of uranium in soil, water, sediments, and biota were also provided for uranium ore bodies located in British Columbia, Saskatchewan, Ontario, Northwest Territories (NWT), and Labrador. In some cases, the data reported came from published sources; however, information was also provided as unpublished (raw) data and may be subject to potential errors and omissions. The monitoring data provided here are dynamic and should be considered representative of the best available information for the time period reported. All references have been provided for unpublished data cited in this report.