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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 4.33. 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 Upper <strong>Fraser</strong> <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 ND ND ND 0% (20) 0% (73) 0% (37) 0% (140)Nickel, total ND ND ND ND 0% (10) 1% (68) 0% (20) 0% (128)Selenium, total ND ND ND ND 0% (23) 0% (45) 0% (40) 0% (84)Silver, total ND ND ND ND ND 0% (54) ND 2% (102)ChlorophenolsDichlorophenol ND ND ND ND ND 0% (9) ND 0% (27)M<strong>on</strong>ochlorophenol ND ND ND ND ND 0% (9) ND 0% (27)Pentachlorophenol ND ND ND ND ND 0% (9) ND 0% (27)Tetrachlorophenol ND ND ND ND ND 0% (9) ND 0% (27)Trichlorophenol ND ND ND ND ND 0% (9) ND 0% (27)OtherCyanide (weak acid dissociable) ND ND ND ND ND ND ND 0% (1)Phenols ND ND ND ND 13% (15) ND 17% (29) NDND = 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-171

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