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In 1976, the British Columbia Geological Survey, in partnership with the Geological Survey of Canada, initiated reconnaissance stream sediment and water surveys across the province. Originally referred to as the Uranium Reconnaissance Program (URP), the program was renamed the Regional Geochemical Survey (RGS) in 1978. In 1987, the British Columbia Geological Survey began to administer the surveys independently, as part of Canada's National Geochemical Reconnaissance (NGR) program. Starting in 2006, samples from new surveys and archived samples were analyzed by Geoscience BC, and the results incorporated into the RGS database.
The regional geochemical survey includes determinations for up to 63 analytes from almost 64,000 stream and lake sediment and water samples that were collected from sixty nine 1:250,000 NTS map sheets covering ~ 80 per cent of the province (Lett, 2011: Regional geochemical survey database. Ministry of Energy and Mines, British Columbia Geological Survey, GeoFile 2011-07).
Almost 900 hardcopy maps showing sample locations for the Regional Geochemical Survey are digitally archived in Property File.