340821-001 FINAL United Keno HHERA 4 May 2011

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Human Health and Ecological Risk Assessment for the Historic Keno Hill Mine Site Table 4.9 Summary of Exposure Point Concentrations for Terrestrial Assessment - Fish..................................................................................................................... 4-16 Table 4.10 Summary of Exposure Point Concentrations for Terrestrial Assessment - Aquatic Vegetation ............................................................................................ 4-17 Table 4.11 Summary of Exposure Point Concentrations for Terrestrial Assessment - Soil ..................................................................................................................... 4-18 Table 4.12 Summary of Exposure Point Concentrations for Terrestrial Assessment - Forage ................................................................................................................ 4-19 Table 4.13 Summary of Exposure Point Concentrations for Terrestrial Assessment - Browse ...............................................................................................................4-20 Table 4.14 Summary of Exposure Point Concentrations for Terrestrial Assessment - Berries................................................................................................................4-21 Table 4.15 Summary of Exposure Point Concentrations for Terrestrial Assessment - Moss/Lichen.......................................................................................................4-22 Table 4.16 Data Used to Develop Exposure Point Concentrations for Human Health Assessment......................................................................................................... 4-23 Table 4.17 Summary of Exposure Point Concentrations for Human Health Assessment......................................................................................................... 4-24 Table 4.18 Water-to-Fish, Benthic, Sediment and Aquatic Vegetation Transfer Factors................................................................................................................ 4-27 Table 4.19 Feed-to-Flesh Transfer Factors for Caribou, Hare and Moose..........................4-28 Table 4.20 Feed-to-Flesh Transfer Factors for Waterfowl and Spruce Grouse...................4-29 Table 4.21 Feed-to-Flesh Transfer Factors for Beaver, Marmot and Sheep........................4-33 Table 4.22 Calculated Total Intakes for Ecological Receptors............................................4-35 Table 4.23 Calculated Intakes for Toddler at South McQuesten Area ................................ 4-38 Table 4.24 Calculated Intakes for Toddler at Galena Hill Area ..........................................4-39 Table 4.25 Ingestion Intakes by Pathways for Toddler at South McQuesten Area.............4-40 Table 4.26 Ingestion Intakes by Pathways for Toddler at Galena Hill Area .......................4-41 Table 5.1 Aquatic Toxicological Reference Values Used in the Aquatic Assessment........ 5-4 Table 5.2 Summary of Aquatic Toxicological Reference Values ..................................... 5-13 Table 5.3 Sediment Quality Toxicity Benchmarks............................................................5-14 Table 5.4 Summary of Toxicological Reference Values from Laboratory Animal Studies................................................................................................................ 5-16 Table 5.5 Summary of Toxicological Reference Values from Laboratory Bird Studies................................................................................................................ 5-19 Table 5.6 Summary of LOAEL Toxicological Reference Values for Terrestrial Ecological Receptors .........................................................................................5-22 Table 5.7 Summary of Human Toxicological Reference Values ......................................5-37 Table 6.1 Screening Index Values for Aquatic Receptors at the Historic Keno Hill Mine Site.............................................................................................................. 6-4 Table 6.2 Screening Index Values for Sediment Exposure at the Historic Keno Hill Mine Site............................................................................................................ 6-10 Table 6.3 Screening Index Values for Avian Receptors at the Historic Keno Hill Mine Site............................................................................................................ 6-13 Table 6.4 Screening Index Values for Mammalian Receptors at the Historic Keno Hill Mine Site.....................................................................................................6-16 340821-001 – FINAL – May 2011 v SENES Consultants Limited
Human Health and Ecological Risk Assessment for the Historic Keno Hill Mine Site Table 6.5 Hazard Quotients Calculated for Human Receptors at the Historic Keno Hill Mine Site - South McQuesten Area............................................................6-20 Table 6.6 Hazard Quotients Calculated for Human Receptors at the Historic Keno Hill Mine Site - Galena Hill Area......................................................................6-21 Table 6.7 Total Risk Levels Calculated for Human Receptors at the Historic Keno Hill Mine Site - South McQuesten Area............................................................6-23 Table 6.8 Total Risk Levels Calculated for Human Receptors at the Historic Keno Hill Mine Site - Galena Hill Area......................................................................6-24 Table 6.9 Comparison of Measured Data in Labrador Tea and Browse............................6-25 Table 6.10 Predicted Intakes for Human Receptors Considering Moose Organs ...............6-26 Table 6.11 Percentage of Intakes for Human Receptors Considering Moose Organs.........6-27 Table 6.12 Comparison of Hazard Quotients With and Without Organ Consumption ....... 6-27 Table 6.13 Summary of Uncertainties in the HHERA......................................................... 6-30 Table 7.1 Results of Aquatic Assessment - Water Quality..................................................7-2 Table 7.2 Results of Aquatic Assessment - Sediment Quality ............................................7-3 Table 7.3 Results of Terrestrial Assessment........................................................................7-4 LIST OF FIGURES Figure 2.1 Page No. Keno Hill Mine Site Location..............................................................................2-2 Figure 2.2 Detailed Site Plan.................................................................................................2-3 Figure 2.3 Summary of Aquatic Environment Sampling Locations.....................................2-7 Figure 2.4 Summary of Terrestrial Environment Sampling Locations...............................2-13 Figure 2.5 Selection Process for Constituents of Potential Concern...................................2-30 Figure 3.1 Aquatic Receptors Included in the Assessment...................................................3-2 Figure 3.2 Terrestrial Receptors Considered for the Assessment .........................................3-6 Figure 3.3 Potential Pathways of Exposure for Caribou, Grouse, Hare, Marmot and Sheep.................................................................................................................... 3-8 Figure 3.4 Potential Pathways of Exposure for Black Bear, Fox and Wolf..........................3-9 Figure 3.5 Potential Pathways of Exposure for Mallard, Merganser And Scaup ...............3-10 Figure 3.6 Potential Pathways of Exposure for Mink, Moose And Beaver ........................3-11 Figure 3.7 Conceptual Site Model for Humans................................................................... 3-15 Figure 4.1 Exposure Locations Evaluated for Terrestrial Assessment ................................. 4-4 340821-001 – FINAL – May 2011 vi SENES Consultants Limited
Page 2 and 3: FINAL HUMAN HEALTH AND ECOLOGICAL R
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Page 34 and 35: Notes: Map adapted from Minnow 2010
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340821-001 FINAL United Keno HHERA 4 May 2011

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