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Potential Effects of Contaminants on Fraser River Sockeye Salmon

Potential Effects of Contaminants on Fraser River Sockeye Salmon

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Table 4.34. 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 Pitt <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-1990C<strong>on</strong>venti<strong>on</strong>alspH ND ND 0% (5) 0% (15) 0% (2) ND 0% (11) 0% (19)Residue N<strong>on</strong>-filterable (TSS) ND ND ND 0% (11) 50% (2) ND 40% (10) 70% (10)Turbidity ND ND ND 25% (16) 50% (2) ND 60% (10) 100% (10)NutrientsAmm<strong>on</strong>ia, dissolved ND ND ND 0% (5) 0% (2) ND 0% (9) NDNitrogen-Nitrite, dissolved (NO 2 ) ND ND ND 0% (15) 0% (2) ND 0% (10) 0% (20)MetalsAluminum, total ND ND ND ND 50% (2) ND 80% (10) NDIr<strong>on</strong>, total ND ND ND ND 50% (2) ND 60% (10) NDMolybdenum, total ND ND ND ND 0% (2) ND 0% (10) NDChlorophenolsPentachlorophenol ND ND ND ND ND ND 0% (1) 0% (3)Tetrachlorophenol ND ND ND ND ND ND 0% (1) 0% (3)Trichlorophenol ND ND ND ND ND ND 0% (1) 0% (3)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-172

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