Pierre River Mine Project

HEALTH AENV SIRS 79 – 89
Section 14.1
mercury and molybdenum, in fact, remain essentially unchanged from the
Additional Environmental Setting Report and the HHRA because the fish
consumption pathway remained the dominant exposure pathway contributing to
the predicted RQ values for these COPCs. Discussion of predicted RQ values for
methyl mercury and molybdenum can be found in EIA, Volume 3, Section
5.3.3.3.
Risk quotients for manganese, the “neurotoxicants” mixture and the
“reproductive and developmental toxicants” mixture were predicted to increase
from those reported in the Additional Environmental Setting Report (May 2009
Pierre River Mine, Supplemental Information, Volume 2, Appendix B, Section 4)
and the HHRA (see EIA, Volume 3, Section 5.3.3.3). Manganese was the only
COPC for which the predicted RQ values increased above the benchmark of 1.0
due to the inclusion of non-traditional food consumption in the multiple pathway
assessment.
The predicted RQ values for manganese, the “neurotoxicants” mixture and the
“reproductive and developmental toxicants” mixture are discussed below.
Table AENV 86-1: Consumption Rates for the Cabin and Aboriginal Residents
Consumption Rate
Life Stages
(a)
(g/d) Infant (b) Toddler Child Adolescent Adult Reference
Traditional Foods
moose 0 65 95 133 205 Health Canada (2004a); Wein (1989)
snowshoe hare 0 14 20 28 43 Health Canada (2004a); Wein (1989)
ruffed grouse 0 7 10 14 22 Health Canada (2004a); Wein (1989)
fish 0 22 40 47 51 Health Canada (2004a); FMES
(1996); AHW (2007)
berries 3 5 11 19 23 Wein (1989); AHW (2007)
cattail root 0.4 1 1 3 3 Wein (1989); AHW (2007)
wild mint and Labrador
tea leaves
0.4 1 1 3 3 Wein (1989); AHW (2007)
Non-Traditional Foods
fruit (c) 0 40 69 56 46 Health Canada (1994)
root vegetables 0 105 161 227 188 Health Canada (2004a)
leafy vegetables 0 67 98 120 137 Health Canada (2004a)
Note:
(a) Consumption rates for the traditional foods remain unchanged from the HHRA (EIA, Volume 3, Section 5.3.2,
Table 5.3-5).
(b) Infants are assumed to ingest 664 grams per day of breast milk (O’Connor and Richardson 1997; Health Canada 1994).
(c) Fruit consumption rates based on composite of apples, apple sauce, cherries, strawberries, blueberries, jams and honey.
April 2010 Shell Canada Limited 14-25
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