9420.pdf
9420.pdf
9420.pdf
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Table 3.7 Production-based Contaminant Discharge - B.C. Lower Mainland Fish<br />
Processing Plants<br />
Specie Processed BOD COD TSS<br />
[kg/1000 kg of [kg/1000 kg of [kg/1000 kg of<br />
product] product] product]<br />
Salmon 1-66 3-44 1-167<br />
Salmon/Groundfish 1-16 2-25 1-8<br />
Groundfish/Halibut* 1-18 1-7 0.2-3<br />
Herring 0.2-10 0.3-12 1-3<br />
Source: NovaTec and EVS, 1994<br />
Table 3.8 Selected Heavy Metal<br />
Processing Plants<br />
Concentrations<br />
* Derived from limited data base<br />
h 1<br />
Metal Concentration [mg/L]<br />
Cadmium < 0.02<br />
Chromium I < 0.015<br />
Copper I 0.013-0.159<br />
Nickel ~ < 0.04<br />
Lead ~ < 0.1<br />
Zinc I 0.072-0.433<br />
Source: NovaTec and EVS, 1994<br />
Note: < Not detected at the detection limit indicated.<br />
A battery of four different toxicity tests were carried out including acute and chronic<br />
toxicity tests, such as the 96hr LC50 test using rainbow trout, and the seven day<br />
Ceriodaphnia dubia. A summary of the test results is shown in Table 3.9. Several effluent<br />
samples failed some or all of the toxicity tests, which was attributed to high effluent<br />
ammonia concentrations and/or BOD. Unlike persistent toxins, which present the<br />
24<br />
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