Appendix 7-2 Detailed Assessment Results of Ecological Risk Assessment – Aquatic Life
Table 1 Ecological Risk to Aquatic Life at edge of Mixing Zone due to Contaminants of Concern (Scenario 1)
|
COC |
Conc. in Effluent (mg/L) |
Conc. in Seawater (mg/L) |
Conc. at edge of Mixing Zone – Daily Max. (mg/L) |
Conc. at edge of Mixing Zone – Annual Avg. (mg/L) |
Conc. at edge of Mixing Zone – 4-day Avg. (mg/L) |
Conc. at edge of Mixing Zone – Lowest Seasonal Avg. Dilution Factor (mg/L) |
Conc. at edge of Mixing Zone – 10%tile dilution factor (mg/L) |
Toxicity Reference Value (mg/L) |
Hazard Quotient |
|
Total Residual Chlorine |
0.1 |
0 |
1.61E-03 |
5.49E-04 |
5.08E-04 |
5.88E-04 |
8.70E-04 |
0.013 |
1.24E-01 |
|
Chloroform |
0.007 |
0 |
1.13E-04 |
3.85E-05 |
3.55E-05 |
4.12E-05 |
6.09E-05 |
0.012 |
3.21E-03 |
|
Chloroacetic acid |
0.004 |
0 |
6.45E-05 |
2.20E-05 |
2.03E-05 |
2.35E-05 |
3.48E-05 |
32 |
7.35E-07 |
|
Dibromoacetic acid |
0.004 |
0 |
6.45E-05 |
2.20E-05 |
2.03E-05 |
2.35E-05 |
3.48E-05 |
0.69 |
3.41E-05 |
|
Dichloroacetic acid |
0.0459 |
0 |
7.40E-04 |
2.52E-04 |
2.33E-04 |
2.70E-04 |
3.99E-04 |
0.23 |
1.17E-03 |
|
Trichloroacetic acid |
0.022 |
0 |
3.55E-04 |
1.21E-04 |
1.12E-04 |
1.29E-04 |
1.91E-04 |
93 |
1.39E-06 |
|
Tetrachloroethylene |
0.0013 |
0 |
2.10E-05 |
7.14E-06 |
6.60E-06 |
7.65E-06 |
1.13E-05 |
0.00885 |
8.07E-04 |
|
Trichloroethylene |
0.002 |
0 |
3.23E-05 |
1.10E-05 |
1.02E-05 |
1.18E-05 |
1.74E-05 |
0.01 |
1.10E-03 |
|
2,4,6-trichlorophenol |
0.002 |
0 |
3.23E-05 |
1.10E-05 |
1.02E-05 |
1.18E-05 |
1.74E-05 |
0.0121 |
9.72E-04 |
|
Hexachlorobenzene |
0.00025 |
0 |
4.03E-06 |
1.37E-06 |
1.27E-06 |
1.47E-06 |
2.17E-06 |
0.00003 |
4.58E-02 |
|
b-BHC |
0.0005 |
0 |
8.06E-06 |
2.75E-06 |
2.54E-06 |
2.94E-06 |
4.35E-06 |
0.000046 |
5.97E-02 |
|
g-BHC |
0.0005 |
0 |
8.06E-06 |
2.75E-06 |
2.54E-06 |
2.94E-06 |
4.35E-06 |
0.000063 |
4.36E-02 |
|
|
|
|
|
|
|
|
|
Hazard Index |
2.80E-01 |
|
|
Concentration adopted for Hazard Quotient calculation |
|
|
|
|
|
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Table 2 Ecological Risk to Aquatic Life at edge of Mixing Zone due to Contaminants of Concern (Scenario 2)
|
COC |
Conc. in Effluent (mg/L) |
Conc. in Seawater (mg/L) |
Conc. at edge of Mixing Zone – Daily Max. (mg/L) |
Conc. at edge of Mixing Zone – Annual Avg. (mg/L) |
Conc. at edge of Mixing Zone – 4-day Avg. (mg/L) |
Conc. at edge of Mixing Zone – Lowest Seasonal Avg. Dilution Factor (mg/L) |
Conc. at edge of Mixing Zone – 10%tile dilution factor (mg/L) |
Toxicity Reference Value (mg/L) |
Hazard Quotient |
|
Total Residual Chlorine |
0.1 |
0 |
1.67E-03 |
5.78E-04 |
5.32E-04 |
6.17E-04 |
9.09E-04 |
0.013 |
1.28E-01 |
|
Chloroform |
0.007 |
0 |
1.17E-04 |
4.05E-05 |
3.72E-05 |
4.32E-05 |
6.36E-05 |
0.012 |
3.37E-03 |
|
Chloroacetic acid |
0.004 |
0 |
6.67E-05 |
2.31E-05 |
2.13E-05 |
2.47E-05 |
3.64E-05 |
32 |
7.72E-07 |
|
Dibromoacetic acid |
0.004 |
0 |
6.67E-05 |
2.31E-05 |
2.13E-05 |
2.47E-05 |
3.64E-05 |
0.69 |
3.58E-05 |
|
Dichloroacetic acid |
0.0459 |
0 |
7.65E-04 |
2.65E-04 |
2.44E-04 |
2.83E-04 |
4.17E-04 |
0.23 |
1.23E-03 |
|
Trichloroacetic acid |
0.022 |
0 |
3.67E-04 |
1.27E-04 |
1.17E-04 |
1.36E-04 |
2.00E-04 |
93 |
1.46E-06 |
|
Tetrachloroethylene |
0.0013 |
0 |
2.17E-05 |
7.51E-06 |
6.91E-06 |
8.02E-06 |
1.18E-05 |
0.00885 |
8.49E-04 |
|
Trichloroethylene |
0.002 |
0 |
3.33E-05 |
1.16E-05 |
1.06E-05 |
1.23E-05 |
1.82E-05 |
0.01 |
1.16E-03 |
|
2,4,6-trichlorophenol |
0.002 |
0 |
3.33E-05 |
1.16E-05 |
1.06E-05 |
1.23E-05 |
1.82E-05 |
0.0121 |
1.02E-03 |
|
Hexachlorobenzene |
0.00025 |
0 |
4.17E-06 |
1.45E-06 |
1.33E-06 |
1.54E-06 |
2.27E-06 |
0.00003 |
4.82E-02 |
|
b-BHC |
0.0005 |
0 |
8.33E-06 |
2.89E-06 |
2.66E-06 |
3.09E-06 |
4.55E-06 |
0.000046 |
6.28E-02 |
|
g-BHC |
0.0005 |
0 |
8.33E-06 |
2.89E-06 |
2.66E-06 |
3.09E-06 |
4.55E-06 |
0.000063 |
4.59E-02 |
|
|
|
|
|
|
|
|
|
Hazard Index |
2.93E-01 |
|
|
Concentration adopted for Hazard Quotient calculation |
|
|
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|
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Table 3 Ecological Risk to Aquatic Life at edge of Mixing Zone due to Contaminants of Concern (Scenario 3)
|
COC |
Conc. in Effluent (mg/L) |
Conc. in Seawater (mg/L) |
Conc. at edge of Mixing Zone – Daily Max. (mg/L) |
Conc. at edge of Mixing Zone – Annual Avg. (mg/L) |
Conc. at edge of Mixing Zone – 4-day Avg. (mg/L) |
Conc. at edge of Mixing Zone – Lowest Seasonal Avg. Dilution Factor (mg/L) |
Conc. at edge of Mixing Zone – 10%tile dilution factor (mg/L) |
Toxicity Reference Value (mg/L) |
Hazard Quotient |
|
Total Residual Chlorine |
0.1 |
0 |
2.00E-03 |
8.47E-04 |
7.69E-04 |
9.01E-04 |
1.35E-03 |
0.013 |
1.54E-01 |
|
Chloroform |
0.007 |
0 |
1.40E-04 |
5.93E-05 |
5.38E-05 |
6.31E-05 |
9.46E-05 |
0.012 |
4.94E-03 |
|
Chloroacetic acid |
0.004 |
0 |
8.00E-05 |
3.39E-05 |
3.08E-05 |
3.60E-05 |
5.41E-05 |
32 |
1.13E-06 |
|
Dibromoacetic acid |
0.004 |
0 |
8.00E-05 |
3.39E-05 |
3.08E-05 |
3.60E-05 |
5.41E-05 |
0.69 |
5.22E-05 |
|
Dichloroacetic acid |
0.0459 |
0 |
9.18E-04 |
3.89E-04 |
3.53E-04 |
4.14E-04 |
6.20E-04 |
0.23 |
1.80E-03 |
|
Trichloroacetic acid |
0.022 |
0 |
4.40E-04 |
1.86E-04 |
1.69E-04 |
1.98E-04 |
2.97E-04 |
93 |
2.13E-06 |
|
Tetrachloroethylene |
0.0013 |
0 |
2.60E-05 |
1.10E-05 |
1.00E-05 |
1.17E-05 |
1.76E-05 |
0.00885 |
1.24E-03 |
|
Trichloroethylene |
0.002 |
0 |
4.00E-05 |
1.69E-05 |
1.54E-05 |
1.80E-05 |
2.70E-05 |
0.01 |
1.69E-03 |
|
2,4,6-trichlorophenol |
0.002 |
0 |
4.00E-05 |
1.69E-05 |
1.54E-05 |
1.80E-05 |
2.70E-05 |
0.0121 |
1.49E-03 |
|
Hexachlorobenzene |
0.00025 |
0 |
5.00E-06 |
2.12E-06 |
1.92E-06 |
2.25E-06 |
3.38E-06 |
0.00003 |
7.06E-02 |
|
b-BHC |
0.0005 |
0 |
1.00E-05 |
4.24E-06 |
3.85E-06 |
4.50E-06 |
6.76E-06 |
0.000046 |
9.21E-02 |
|
g-BHC |
0.0005 |
0 |
1.00E-05 |
4.24E-06 |
3.85E-06 |
4.50E-06 |
6.76E-06 |
0.000063 |
6.73E-02 |
|
|
|
|
|
|
|
|
|
Hazard Index |
3.95E-01 |
|
|
Concentration adopted for Hazard Quotient calculation |
|
|
|
|
|
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||
Table 4 Ecological Risk to Aquatic Life at edge of Mixing Zone due to Contaminants of Concern (Scenario 4)
|
COC |
Conc. in Effluent (mg/L) |
Conc. in Seawater (mg/L) |
Conc. at edge of Mixing Zone – Daily Max. (mg/L) |
Conc. at edge of Mixing Zone – Annual Avg. (mg/L) |
Conc. at edge of Mixing Zone – 4-day Avg. (mg/L) |
Conc. at edge of Mixing Zone – Lowest Seasonal Avg. Dilution Factor (mg/L) |
Conc. at edge of Mixing Zone – 10%tile dilution factor (mg/L) |
Toxicity Reference Value (mg/L) |
Hazard Quotient |
|
Total Residual Chlorine |
0.1 |
0 |
2.33E-03 |
9.62E-04 |
7.87E-04 |
9.62E-04 |
1.56E-03 |
0.013 |
1.79E-01 |
|
Chloroform |
0.007 |
0 |
1.63E-04 |
6.73E-05 |
5.51E-05 |
6.73E-05 |
1.09E-04 |
0.012 |
5.61E-03 |
|
Chloroacetic acid |
0.004 |
0 |
9.30E-05 |
3.85E-05 |
3.15E-05 |
3.85E-05 |
6.25E-05 |
32 |
1.20E-06 |
|
Dibromoacetic acid |
0.004 |
0 |
9.30E-05 |
3.85E-05 |
3.15E-05 |
3.85E-05 |
6.25E-05 |
0.69 |
5.57E-05 |
|
Dichloroacetic acid |
0.0459 |
0 |
1.07E-03 |
4.41E-04 |
3.61E-04 |
4.41E-04 |
7.17E-04 |
0.23 |
1.92E-03 |
|
Trichloroacetic acid |
0.022 |
0 |
5.12E-04 |
2.12E-04 |
1.73E-04 |
2.12E-04 |
3.44E-04 |
93 |
2.27E-06 |
|
Tetrachloroethylene |
0.0013 |
0 |
3.02E-05 |
1.25E-05 |
1.02E-05 |
1.25E-05 |
2.03E-05 |
0.00885 |
1.41E-03 |
|
Trichloroethylene |
0.002 |
0 |
4.65E-05 |
1.92E-05 |
1.57E-05 |
1.92E-05 |
3.13E-05 |
0.01 |
1.92E-03 |
|
2,4,6-trichlorophenol |
0.002 |
0 |
4.65E-05 |
1.92E-05 |
1.57E-05 |
1.92E-05 |
3.13E-05 |
0.0121 |
1.59E-03 |
|
Hexachlorobenzene |
0.00025 |
0 |
5.81E-06 |
2.40E-06 |
1.97E-06 |
2.40E-06 |
3.91E-06 |
0.00003 |
8.01E-02 |
|
b-BHC |
0.0005 |
0 |
1.16E-05 |
4.81E-06 |
3.94E-06 |
4.81E-06 |
7.81E-06 |
0.000046 |
1.05E-01 |
|
g-BHC |
0.0005 |
0 |
1.16E-05 |
4.81E-06 |
3.94E-06 |
4.81E-06 |
7.81E-06 |
0.000063 |
7.63E-02 |
|
|
|
|
|
|
|
|
|
Hazard Index |
4.52E-01 |
|
|
Concentration adopted for Hazard Quotient calculation |
|
|
|
|
|
|
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Table 5 Ecological Risk to Aquatic Life at edge of Mixing Zone due to Contaminants of Concern (Scenario 5)
|
COC |
Conc. in Effluent (mg/L) |
Conc. in Seawater (mg/L) |
Conc. at edge of Mixing Zone – Daily Max. (mg/L) |
Conc. at edge of Mixing Zone – Annual Avg. (mg/L) |
Conc. at edge of Mixing Zone – 4-day Avg. (mg/L) |
Conc. at edge of Mixing Zone – Lowest Seasonal Avg. Dilution Factor (mg/L) |
Conc. at edge of Mixing Zone – 10%tile dilution factor (mg/L) |
Toxicity Reference Value (mg/L) |
Hazard Quotient |
||
|
Total Residual Chlorine |
0.01 |
0 |
2.33E-04 |
9.62E-05 |
7.87E-05 |
9.62E-05 |
1.56E-04 |
0.013 |
1.79E-02 |
||
|
Bromoform |
0.049 |
0 |
1.14E-03 |
4.71E-04 |
3.86E-04 |
4.71E-04 |
7.66E-04 |
0.36 |
1.31E-03 |
||
|
Dibromochloromethane |
0.008 |
0 |
1.86E-04 |
7.69E-05 |
6.30E-05 |
7.69E-05 |
1.25E-04 |
0.034 |
2.26E-03 |
||
|
Dibromoacetic acid |
0.01 |
0 |
2.33E-04 |
9.62E-05 |
7.87E-05 |
9.62E-05 |
1.56E-04 |
0.69 |
1.39E-04 |
||
|
Dichloroacetic acid |
0.003 |
0 |
6.98E-05 |
2.88E-05 |
2.36E-05 |
2.88E-05 |
4.69E-05 |
0.23 |
1.25E-04 |
||
|
Trichloroacetic acid |
0.007 |
0 |
1.63E-04 |
6.73E-05 |
5.51E-05 |
6.73E-05 |
1.09E-04 |
93 |
7.24E-07 |
||
|
Hexachlorobenzene |
0.00025 |
0 |
5.81E-06 |
2.40E-06 |
1.97E-06 |
2.40E-06 |
3.91E-06 |
0.00003 |
8.01E-02 |
||
|
b-BHC |
0.0005 |
0 |
1.16E-05 |
4.81E-06 |
3.94E-06 |
4.81E-06 |
7.81E-06 |
0.000046 |
1.05E-01 |
||
|
g-BHC |
0.0005 |
0 |
1.16E-05 |
4.81E-06 |
3.94E-06 |
4.81E-06 |
7.81E-06 |
0.000063 |
7.63E-02 |
||
|
|
|
|
|
|
|
|
|
Hazard Index |
2.83E-01 |
||
|
|
Concentration adopted for Hazard Quotient calculation |
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