Pierre River Mine Project

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WATER ERCB SIRS 46 – 79 References Question No. 79 Section 7.1 Therefore, a hydraulic conductivity value of 1 x 10 -6 m/s was assigned to the fluid cells. The overburden cap hydraulic conductivity (1 x 10 -7 m/s) listed by Shell (2002; 2005) is similar to the value (5 x 10 -7 m/s) listed in EIA, Volume 4B, Appendix 4-1, Table 8, which was adjusted to reflect an average hydraulic conductivity value for overburden materials local to the Pierre River Mine area. EIA, Volume 4B, Appendix 4-1, Section 1.2.4.7, indicates that extensive prediction confidence simulations were conducted for the Pierre River Mine local model by varying the hydraulic conductivity values of mine pit backfill, fluid tailings and overburden capping by factors of 10 from calibrated values. This factor of 10 addresses the uncertainty in the expected properties of these engineered materials. Shell (Shell Canada Limited). 2002. Application for Approval of the Jackpine Mine – Phase 1. Submitted to the Alberta Energy and Utilities Board and Alberta Environment. May 2002. Shell Canada Limited. 2005. Application for Approval of the Muskeg River Mine Expansion Project. Submitted to the Alberta Energy and Utilities Board and Alberta Environment, April 2005. Request Appendix 4-1, Section 1.3.2, Page 102. Shell states, “The substances considered in this assessment represent a range of dissolved compound behaviors, including conservative (non-retarded and nondegradable), retarded and degradable constituents.” 79a Discuss the chemical behavior pattern for non conservative constituents (Naphthenic acids and polycyclic aromatic hydrocarbons (PAHs)) in groundwater aquifers in terms of their adsorption tendency, fractionation (daughter products), organic carbon partitioning and oxidation-reduction potential. Response 79a The chemical behaviour of the indicator constituents included in the solute transport model, in terms of adsorption tendency (Kd) and anaerobic decay (halflife), are listed in EIA, Volume 4B, Appendix 4-1, Table 12. Organic carbon partitioning coefficients (Koc) for naphthenic acids, PAH Group 2 and PAH Group 8 were included in the distribution coefficients (Kd) by applying an organic carbon content fraction of 0.006 in the function Kd = Koc*foc. In the surface water quality assessment, retardation of PAH groups that were not April 2010 Shell Canada Limited 7-37 CR029
WATER ERCB SIRS 46 – 79 Section 7.1 modelled explicitly in the solute transport model was applied based on structure similarity relative to indicator PAH groups. Anaerobic decay rates were applied to each PAH group and to labile naphthenic acids, as described in EIA, Volume 4B, Appendix 4-1, Table 12. No additional chemical or physical changes (e.g., oxidation-reduction potential) were modelled for naphthenic acids and PAHs in groundwater aquifers. If these processes occur, they will lead to reductions in solute concentrations beyond that predicted in the EIA modelling. Omitting these processes is, therefore, conservative. 7-38 Shell Canada Limited April 2010 CR029
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Application for Approval of the Pie
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PIERRE RIVER MINE SUPPLEMENTAL INFO
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CONTENTS LIST OF ILLUSTRATIONS Tabl
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INTRODUCTION OVERVIEW Table 1-1: Gu
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INTRODUCTION NAVIGABLE WATERS Secti
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INTRODUCTION NAVIGABLE WATERS Secti
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Section 2.2 ERRATA EIA, EIA UPDATE
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Section 2.2 ERRATA EIA, EIA UPDATE
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Section 2.3 ERRATA SUPPLEMENTAL INF
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Section 2.3 ERRATA SUPPLEMENTAL INF
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MINING AND PROCESSING ERCB SIRS 3 -
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AIR ERCB SIRS 40 - 45 Request 41b B
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AIR ERCB SIRS 40 - 45 Table ERCB 41
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AIR ERCB SIRS 40 - 45 Community Tab
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WATER AENV SIRS 15 - 43 Section 12.
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WATER AENV SIRS 15 - 43 Question No
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WATER AENV SIRS 15 - 43 Data Type N
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WATER AENV SIRS 15 - 43 Figure AENV
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WATER AENV SIRS 15 - 43 Figure AENV
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WATER AENV SIRS 15 - 43 • tempera
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WATER AENV SIRS 15 - 43 References
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TERRESTRIAL AENV SIRS 44 - 78 Refer
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TERRESTRIAL AENV SIRS 44 - 78 Revis
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TERRESTRIAL AENV SIRS 44 - 78 Quest
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TERRESTRIAL AENV SIRS 44 - 78 Commo
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TERRESTRIAL AENV SIRS 44 - 78 Schne
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HEALTH AENV SIRS 79 - 89 Question N
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EPEA APPROVALS AENV SIRS 90 - 96 Qu
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EPEA APPROVALS AENV SIRS 90 - 96 Se
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GLOSSARY CEAA The abbreviation for
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GLOSSARY ESR The abbreviation for e
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GLOSSARY landform The configuration
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GLOSSARY OSDG The abbreviation for
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GLOSSARY SEWG The abbreviation for
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Pierre River Mine Project

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