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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 5.14. 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 threshold for surface water in juvenile rearing areas in the <strong>Fraser</strong> <strong>River</strong> Basin.C<strong>on</strong>taminant <str<strong>on</strong>g>of</str<strong>on</strong>g> C<strong>on</strong>cernAreas <str<strong>on</strong>g>of</str<strong>on</strong>g> InterestLower Thomps<strong>on</strong> <strong>River</strong> North Thomps<strong>on</strong> <strong>River</strong> South Thomps<strong>on</strong> <strong>River</strong>Chilko <strong>River</strong>Pre-1990 Post-1990 Pre-1990 Post-1990 Pre-1990 Post-1990 Pre-1990 Post-1990C<strong>on</strong>venti<strong>on</strong>als (mg/L)Residue: N<strong>on</strong>-filterable (TSS) ND ND ND ND 3% (71) 0% (4) 0% (1) 10% (10)NutrientsNitrogen - Nitrite, dissolved(NO 2 )ND 0% (21) ND ND 0% (168) 0% (172) 0% (6) 0% (6)Major I<strong>on</strong>sChloride, dissolved ND 0% (43) ND ND 0% (178) 0% (626) ND NDSulfate, dissolved ND 0% (40) ND ND 0% (190) 0% (533) 0% (7) 0% (10)MetalsAluminum, total ND ND ND ND 19% (32) 0% (33) ND 100% (10)Arsenic, total ND ND ND ND 0% (1) 0% (33) ND 0% (10)Cadmium, total ND ND ND ND 9% (32) 8% (24) ND NDChromium, total ND ND ND ND 100% (3) 10% (10) ND 100% (4)Cobalt, total ND ND ND ND 100% (1) 0% (34) ND 0% (10)Copper, total ND ND ND ND 0% (25) 0% (23) 0% (1) NDIr<strong>on</strong>, total ND ND ND ND 4% (74) 0% (32) 100% (1) 100% (10)Lead, total ND ND ND ND 0% (24) 0% (5) 0% (1) NDMercury, total ND ND ND ND 0% (44) ND ND NDNickel, total ND ND ND ND 0% (24) 0% (24) ND NDSelenium, total ND ND ND ND ND 0% (9) ND NDSilver, total ND ND ND ND ND 11% (9) ND 0% (4)OtherPhenols ND ND ND ND ND ND ND NDND = no data; TSS = total suspended solids.T-229

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