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Potential Effects of Contaminants on Fraser River Sockeye Salmon

Potential Effects of Contaminants on Fraser River Sockeye Salmon

Potential Effects of Contaminants on Fraser River Sockeye Salmon

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Table 4.41. Frequency <str<strong>on</strong>g>of</str<strong>on</strong>g> exceedance <str<strong>on</strong>g>of</str<strong>on</strong>g> the selected toxicity screening values for surface water in the Quesnel <strong>River</strong> Area <str<strong>on</strong>g>of</str<strong>on</strong>g> Interest.Chemical <str<strong>on</strong>g>of</str<strong>on</strong>g> <str<strong>on</strong>g>Potential</str<strong>on</strong>g> C<strong>on</strong>cernFrequency <str<strong>on</strong>g>of</str<strong>on</strong>g> Exceedance <str<strong>on</strong>g>of</str<strong>on</strong>g> Toxicity Screening Values (total number <str<strong>on</strong>g>of</str<strong>on</strong>g> samples)Spawning & Incubati<strong>on</strong> Juvenile Rearing Smolt Outmigrati<strong>on</strong> Adult Upstream Migrati<strong>on</strong>Pre-1990 Post-1990 Pre-1990 Post-1990 Pre-1990 Post-1990 Pre-1990 Post-1990Metals (c<strong>on</strong>tinued)Molybdenum, total ND 0% (28) ND ND ND 0% (17) ND 0% (18)Nickel, total ND 0% (10) ND ND ND 6% (17) ND 0% (18)Selenium, total ND 0% (28) ND ND ND 6% (17) ND 0% (16)Silver, total ND 0% (28) ND ND ND 0% (11) ND 0% (13)OtherCyanide (weak acid dissociable) ND ND ND ND ND 0% (11) ND 0% (13)ND = no data; TSS = total suspended solids.Only chemicals <str<strong>on</strong>g>of</str<strong>on</strong>g> potential c<strong>on</strong>cern for which data were available in an area <str<strong>on</strong>g>of</str<strong>on</strong>g> interest were reported.Pre-1990 includes 1990.T-185

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