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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 4.36. 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 Kakawa Lake 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 ND ND 0% (6) ND 0% (11) NDResidue N<strong>on</strong>-filterable (TSS) ND ND ND ND 0% (4) ND 0% (8) NDTurbidity ND ND ND ND 50% (2) ND 50% (2) NDNutrientsAmm<strong>on</strong>ia, dissolved ND ND ND ND 0% (4) ND 0% (7) NDNitrate (NO 3 ), dissolved ND ND ND ND 0% (4) ND 0% (7) NDNitrogen-Nitrite, dissolved (NO 2 ) ND ND ND ND 0% (6) ND 0% (10) NDPhosphorus, total (stream) ND ND ND ND 75% (4) ND 38% (8) NDMajor I<strong>on</strong>sChloride, dissolved ND ND ND ND 0% (6) ND 0% (11) NDSulfate, dissolved ND ND ND ND 0% (5) ND 0% (7) NDMetalsArsenic, total ND ND ND ND ND ND 0% (1) NDCopper, total ND ND ND ND 25% (4) ND 14% (7) NDIr<strong>on</strong>, total ND ND ND ND 33% (3) ND 33% (6) NDLead, total ND ND ND ND 33% (3) ND 17% (6) NDManganese, total ND ND ND ND 0% (4) ND 0% (7) NDMolybdenum, total ND ND ND ND ND ND 0% (1) NDNickel, total ND ND ND ND 0% (4) ND 0% (7) 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-175

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