February 2017 Project No

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1 THE RAGLAN MINE PROPERTY BEYOND 2020 (PHASES II AND III): CONTINUATION OF MINING OPERATIONS EAST OF KATINNIQ Environmental and Social Impact Assessment Complementary report: Mining Project sequence change February 2017 Project No

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3 THE RAGLAN MINE PROPERTY BEYOND 2020 (PHASES II AND III): CONTINUATION OF MINING OPERATIONS EAST OF KATINNIQ Environmental and Social Impact Assessment RAGLAN MINE A GLENCORE COMPANY Complementary report: Mining Project sequence change February 2017 Project No Approved by: Jean-Noël Duff, B.Sc., M. Env. Project Director SNC-Lavalin

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5 NOTICE TO READER This report has been prepared and the work referred to in this report has been undertaken by SNC-Lavalin Inc. (SNC-Lavalin), for the exclusive use of Raglan Mine A Glencore Company (the Client), who has been party to the development of the scope of work and understands its limitations. The methodology, findings, conclusions and recommendations in this report are based solely upon the scope of work and subject to the time and budgetary considerations described in the proposal and/or contract pursuant to which this report was issued. Any use, reliance on, or decision made by a third party based on this report is the sole responsibility of such third party. SNC-Lavalin accepts no liability or responsibility for any damages that may be suffered or incurred by any third party as a result of the use of, reliance on, or any decision made based on this report. The findings, conclusions and recommendations in this report (i) have been developed in a manner consistent with the level of skill normally exercised by professionals currently practicing under similar conditions in the area, and (ii) reflect SNC-Lavalin s best judgment based on information available at the time of preparation of this report. No other warranties, either expressed or implied, are made with respect to the professional services provided to Client or the findings, conclusions and recommendations contained in this report. The findings and conclusions contained in this report are valid only as of the date of this report and may be based, in part, upon information provided by others. If any of the information is inaccurate, new information is discovered or project parameters change, modifications to this report may be necessary. This report must be read as a whole, as sections taken out of context may be misleading. If discrepancies occur between the preliminary (draft) and final version of this report, it is the final version that takes precedence. Nothing in this report is intended to constitute or provide a legal opinion. SNC-Lavalin disclaims any liability to the Client and to third parties in respect of the use of (publication, reference, quoting, or distribution), any decision made based on, or reliance on this report or any of its contents. SNC-Lavalin inc All rights reserved. Confidential i

6 COMMITMENT TO QUALITY To demonstrate its commitment to the importance of quality, its priority to meet the requirements of its clients and its commitment to continuous improvement, the Environment & Water Business Unit of SNC-Lavalin inc. has developed a Quality Policy and a Quality Management System tailored to its activities. At Environment & Water, we place a high value on our clients, the environment, and the communities in which we work. We apply our Quality Management Systems consistently, and continually work to improve them. Hence, we recognize that the quality of our services is based upon: Safely executing our work; Collecting information in a systematic way that avoids introduction of bias; Providing deliverables that are technically sound, clear and concise; Providing a highly competent team. At Environment & Water, we understand that our clients satisfaction is vital to our business success. We strive to be a full partner in delivering sustainable projects and endeavour to exceed our clients expectations. Our quality management system is based on this Policy which is reviewed annually during the Quality Management Review. All the Environment & Water staff is conscious of this statement and understands the importance of its application in the business s operations. SNC-Lavalin inc All rights reserved. Confidential ii

7 PRODUCTION TEAM Raglan Mine A Glencore Company Jean-François Verret, Eng. Project Director Amélie Rouleau Governance and Community/Stakeholder Commitment Superintendant Charles Levac Prevention and Environment Director Mélanie Côté, Eng. Environmental Superintendant Trevor Blair, Eng. SR Strategic Planning Supervisor Martin Verreault, Eng. Mining Projects Superintendant SNC-Lavalin inc. Jean-Noël Duff, B. Sc. A., M. Env. Richard Melanson, Eng., D. A., PMP Éric Delisle, B. Sc. A. Christian Fortin, M. Sc. Biologist Geneviève Dionne, Ph. D. Anthropologist Benoît Caron, M. Sc. Biologist Claude Côté, M. Sc. A., Chemical Eng. Alain Chouinard Charlaine Gingras Ahmadou Gaye, MA in Translation Project Director In charge of the Project Description Air Quality Specialist Project Manager and Terrestrial Wildlife Specialist Project Manager and Human Environment Specialist Aquatic Fauna Specialist Water Quality and Technological Risks Specialist Geomatics Technician Senior Administrative Assistant Translator SNC-Lavalin inc All rights reserved. Confidential iii

8 TABLE OF CONTENTS 1 BACKGROUND DESCRIPTION OF MINING PROJECT Surface Infrastructure Current Qakimajurq Mine Surface Infrastructure to be Reused New Surface Facilities Required by Mining Project Underground Infrastructure Water Management DESCRIPTION OF THE ENVIRONMENT - MINING PROJECT 8 CORE STUDY AREA Mining Project 8 Core Study Area Physical Environment Biological Environment Vegetation Fauna Human Environment IMPACT ANALYSIS Air Quality Water Quality Rivière-aux-Feuilles Herd (RFH) Fish Impacts on the Human Environment CONCLUSION SNC-Lavalin inc All rights reserved. Confidential iv

9 LIST OF FIGURES Figure 1-1 Timeline for the Operation of Raglan Mine s Deposits Based on the 1.5 Mtpa Production Scenario... 2 Figure 2-1 Mining Project 8 s Forecast Annual Ore Production... 5 Figure 2-2 Annual Quantity of Tailings Generated by Mining Project Figure 2-3 Surface Infrastructure Required for Mining Project Figure 3-1 Vegetation and Wetlands 2014 and 2015 Field Surveys LIST OF TABLES Table 1-1 Annual Ore and Tailings Production Forecasts for Phases I, II and III from 2017 to SNC-Lavalin inc All rights reserved. Confidential v

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11 1 BACKGROUND The continuation of the Sivumut Project feasibility studies since the finalization and submission of the impact study report made it possible to devise a new mining sequence for the new Phases II and III mining sites. During Phase II, this new sequence would include Mining Projects 8 (formerly referred to as Sector 8) and 14, with the Donaldson Mining Project being implemented later. This document aims to describe recent changes to the Project and analyze what bearing they have on impacts previously identified in the Environmental and Social Impact Assessment Report (ESIA) (SNC-Lavalin inc. 2015). These relatively minor changes consist mainly in the rearrangement of the mining sequence previously defined for all Raglan Mine s new Phase II and III underground mines, as well as the simplification of Mining Project 8 through the use of the Port and existing surface infrastructure of the Qakimajurq Mine which is currently in operation. Figure 1-1 presents the new timeline for the mining of Raglan Mine s deposits and shows that Mining Project 8 will be completed during Phase II instead of Phase III. It also shows Mining Project 8 will start its operation phase before the Mining Project 14 operations phase starts. Table 1-1 presents the new annual ore and tailings production forecast for Phases I, II and III, from 2017 to 2038 for Raglan Mine as a whole and for each of the sectors subject to mining operations. Table 1-1, which is based on current mineral stocks, shows that Raglan Mine s annual production capacity will fall below 1.5 Mt of ore from However, as explained in the impact study, the exploration campaigns due to take place in the coming years will make it possible to complete the current mineral stock which will result in the 1.5 Mt annual production being maintained until the end of Phase III (2041). SNC-Lavalin inc All rights reserved. Confidential 1

12 Figure 1-1 Timeline for the Operation of Raglan Mine s Deposits Based on the 1.5 Mtpa Production Scenario Phase I Phase II Phase III Fosse 2 Mine souterraine Katinniq Fosse 3 Mine souterraine 3 Fosse Champagne Fosse I Mine souterraine 2 Fosse East Lake 1 Fosse Blimp Fosse Spoon Fosse G Fosse East Lake 2 Fosse A (Donaldson) Fosse OP42 (Donaldson) Mine souterraine Kikialik Mine souterraine Qakimajurq Mine souterraine Projet minier 8 Mine souterraine Projet minier 14 Agrandissement du parc à résidus Carrière dans la section sud-ouest du PAR Carrière dans la future section de la Phase III du PAR Carrière secteur West Boundary Mine souterraine Projet minier Donaldson Mine souterraine Secteur Boundary Mine souterraine Secteur West Boundary Agrandissement du parc à résidus Restauration progressive Restauration finale Légende: Mines exploitées ou en exploitation Exploitations futures (Phases II et III) Restauration partielle effectuée Période de construction prévue en surface Période de développement prévu sous terre Restauration progressive durant les trois phases Restauration finale Année de construction du portail vers les mines souterraines. A noter que pour la mine souterraine Katinniq, le portail sud a été construit en 1991 et celui au nord, en Notes: - Le début de l'exploitation correspond au moment où des travaux de minage ont débuté; (enlèvement mort-terrain,stériles, début d'une rampe sous-terre,etc.) - Les travaux associés à la caractérisation des sols, au démantèlement des bâtiments et des infrastructures et à la remise en état du site seront réalisés de façon progressive dans les cinq ans suivants l'arrêt définitif des activités minières au site Raglan. SNC-Lavalin inc All rights reserved. Confidential 2

13 Table 1-1 Annual Ore and Tailings Production Forecasts for Phases I, II and III from 2017 to 2038 SNC-Lavalin inc All rights reserved. Confidential 3

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15 2 DESCRIPTION OF MINING PROJECT 8 The construction and development of Mining Project 8 will begin in 2018 and will end in 2020 as it enters its production phase. Based on current planning, the operations of Mining Project 8 will last a total of 18 years (from 2020 to 2038 inclusive). In total approximately 11.3 Mt will be mined during those years is. Figure 2-1 presents a detailed breakdown of the ore production for each year of operation. The maximum forecast annual production for Mining Project 8 is 1 Mt. Figure 2-1 Mining Project 8 s Forecast Annual Ore Production Figure 2-2 shows the annual quantities of tailings generated by Mining Project 8 throughout its operation phase. A maximum annual quantity of 566,495 tons of tailings will be generated. The tailings rock will be gradually reused in the underground mine as bearing material and as backfill. SNC-Lavalin inc All rights reserved. Confidential 5

16 Figure 2-2 Annual Quantity of Tailings Generated by Mining Project SURFACE INFRASTRUCTURE Mining Project 8 will use the surface infrastructure and portal of the Qakimajurq Mine which is currently being operated. Adding to these will be a waste rock dump and a new collector basin. Figure 2-3 shows the current infrastructure that will be reused and also the waste rock dump to be built next to the new collector basin. Two new ventilation raises will need to be installed as well as paths leading to these raises. SNC-Lavalin inc All rights reserved. Confidential 6

17 73 37' 73 36'45" PROPOSED INFRASTRUCTURE 73 36'30" 73 36'15" INFRASTRUCTURE EXISTING Pad Road 59 0 Collection basin Diversion ditch Existing mining facility ' 73 35'45" 73 35'30" 73 35'15" 73 35' 73 34'45" rd Towa Existing road Ditch 73 34'30" 73 34'15"? on nalds s Do '15" NEIGHBOURING AREA Water body Pipeline 62 0 Intermittent stream Culvert Watershed boundary Wetland ' 61 42'?? Collection ditch Ventilation raise '45"?? Waste pile Ventilation raise '45" Overburden stockpile??? Portal 610 iq tinn Ka Waste burning site (abandoned) 61 0 Tow s ard 0 61 Infrastructure pad Emergency exit Ventilation raise 60 0 Ventilation raise '30" Collection basin Emergency exit 61 41'30" RAGLAN MINE A GLENCORE COMPANY SIVUMUT PROJECT Complementary report: Mining Project sequence change Environmental and Social Impact Assessment? Surface Development of Mining Project Rivière Déception Est watershed Qakimajurq Mine Collection basin 73 37'15" Ore pile Waste pile 59 0 (R3) Explosives storage ' 73 36'45" 73 36'30" 73 36'15" 73 36' UTM projection, Zone 18, NAD27 February '45" 73 35'30" 73 35'15" Topography, 1:1,000, Raglan Mine, 2008 (R2) S:\PROJ\624572_Glencore_Raglan_ESIA_WP11_Environment\4.0_Réalisation\4.5_SIG\GEOMATIQUE\interne\diffusion\produits\624572_026_Changement_sequence\SL f2-3-mine an-F00.mxd Project: File: SL f2-3-mine an-F00.mxd 60 0 Réservoir Katinniapik watershed 610 Sources: 73 35' 73 34'45" 73 34'30" m 1:7,000 Figure '15" 61 41'15"?? 62 0 Pump 0 61?

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19 2.1.1 Current Qakimajurq Mine Surface Infrastructure to be Reused The Qakimajurq Mine surface infrastructure to be used during the implementation of Mining Project 8 includes the following: - A temporary tailings and ore storage facility designed to hold 25,000 tons of tailings and 25,000 tons of ore in 5 m high piles and with lateral slopes of 1.5H: 1V; - Collector ditches surrounding the temporary tailings and mineral waste storage platform designed to direct runoff water towards the existing collector basin; - An infrastructure platform designed to accommodate service buildings and the shelter. The infrastructure platform is designed with an angle that makes it possible to collect and direct runoff water from the portion of the platform occupied by the buildings, and with paths leading to the current collector basin. The remainder of the platform is designed to divert the clean runoff water from the water collection system; - A 21,120 m 3 collector basin excavated in the overburden and rock with a full storage capacity in the sound rock and below the permafrost; - Two explosives warehouses built on two 15 x 15 m platforms; - Three platforms on the edge of the portal currently hosting a temporary generator, a brine tank and settling ponds; - Access roads to the surface infrastructure and portal New Surface Facilities Required by Mining Project 8 The new surface facilities to be built for Mining Project 8 shown in Figure 2-3 are as follows: - A platform for the new waste rock dump with a capacity of 785,000 tons. The waste rock dump will be designed with two piles with an elevation of 10 m each and 1.5H: 1V slopes; - A collector basin, with a capacity of 42,000 m3 collecting the runoff water that will be in contact with the tailings; - One15 m wide access road to the waste rock dump and the new collector basin; - Two 10 m wide access paths to the two ventilation raises and to the emergency exit; - A platform to accommodate a fan required for the underground installations. 2.2 UNDERGROUND INFRASTRUCTURE The cut-and-fill and long-hole mining methods described in Section of the impact study (SNC-Lavalin inc 2015) will be used in the operation of the Mining Project 8 underground mine. The vehicles used for the mining operations will be similar to those used for Mining Project 14. The underground mine will require the following underground infrastructure for staff safety and the smooth running of the mining operations: - A brine distribution and recovery system; - An electrical distribution system consisting of several sub-stations comprising each a junction box, transformers and panels; - A radiating cable communication system; SNC-Lavalin inc All rights reserved. Confidential 9

20 - Shelters to accommodate employees; - A dining room; - An equipment storage building; - An explosives warehouse; - A detonators warehouse; - A refueling station; - A vehicles service area; - A ventilation system. 2.3 WATER MANAGEMENT As shown in Figure 2-3, a water pipe will be used to pump water from the new collector basin of the waste rock dump to the Qakimajurq Mine collector basin. This will make it possible to reuse the water during underground operations and pump the surplus into the collector basin of the tailings pond (BCPAR) where it could be treated by the Katinniq wastewater treatment system. The increase in capacity of the Katinniq wastewater treatment system, which was originally scheduled to be effected during Phase III, to meet the requirements for Mining Project 8, will now be implemented during Phase II and adjusted for the new environmental footprint which is now smaller than anticipated in the impact study report (SNC-Lavalin inc. 2015). SNC-Lavalin inc All rights reserved. Confidential 10

21 3 DESCRIPTION OF THE ENVIRONMENT - MINING PROJECT 8 CORE STUDY AREA The information presented in the Environmental and Social Impact Assessment Report (SNC- Lavalin inc. 2015) is still valid for the regional and local core study areas. However, since the former Sector 8 core study area was expanded, the description of the environment for Mining Project 8 has been revised with respect to some environmental components, to ensure that all significant potential impacts are assessed. 3.1 MINING PROJECT 8 CORE STUDY AREA The Mining Project 8 core study area is shown in Figure 3.1. This study area is larger than the one previously used in the Environmental Impact Assessment Report for the Sector 8 core study area. The core study area has been expanded because the existing infrastructure of the Qakimajurq Mine will be used for the development and operation of Mining Project PHYSICAL ENVIRONMENT Despite the expansion of the core study area, the description of the physical environment presented in the Environmental and Social Impact Assessment Report (SNC-Lavalin inc. 2015) is still valid for each component of the physical environment, i.e. climate, air quality, geology, physiography, geomorphology, soil and rock geochemistry, permafrost, hydrogeology, hydrography and hydrology, surface water quality and sediment quality. It should be noted that the Mining Project 8 facilities will be located in the same watersheds (R2 and R3) as those identified for Sector 8 (Table 5.20 of the ESIA Report). The same applies to the water quality sampling stations (BL-009, BL-010 and BL-108) identified in Figure 5-14 of the Environmental and Social Impact Assessment Report. 3.3 BIOLOGICAL ENVIRONMENT Vegetation The Mining Project 8 core study area was partly covered by vegetation during the field surveys conducted from July 25 to 27, 2014 and from August 21 to 23, 2015 (SNC-Lavalin inc. 2015). The surveyed area, which corresponds to Sector 8 and the extension of the mine tailings site, was dominated by bare ground (Figure 3.1). Therefore, the section of the current core study area that has not been surveyed is also likely to be dominated by this type of habitat. As for the wetlands, a small 0.02 ha swamp was delineated during the surveys (MH 1, Figure 3.1). Other wetlands that were not characterized during the field surveys are present in the core study area. The largest wetland is located close to the old waste incineration site. Following a photointerpretation of the core study area by means of orthophotographs taken in 2008 and 2015, three other very small potential wetlands could also be located in the study area. However, no special status plant species was identified in Sector 8 and the tailings site expansion or elsewhere in the Raglan Mine Property Study Area. SNC-Lavalin inc All rights reserved. Confidential 11

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23 73 37' 73 36' 73 35'30" 73 35' 73 34'30" TERRESTRIAL ENVIRONMENTS Core study area Inventoried area Bare ground Project footprint Mossy stand Anthropogenic WETLANDS Type 73 36'30" r Towa HYDROGRAPHY Marsh ds n ldso Dona? Water body Potential wetland to be validated Intermittent stream Ecological value Ditch 61 41'30" 61 42' 61 42' Medium 61 41'30" MH-01 Tow s ard K RAGLAN MINE niq atin A GLENCORE COMPANY SIVUMUT PROJECT Complementary report: Mining Project sequence change Environmental and Social Impact Assessment? Vegetation and Wetlands 2014 and 2015 Field Surveys Sources: Qakimajurq Mine Orthoimage (Pléiades 1), 50 cm resolution, 2015 Topography, 1:1,000, Raglan Mine, 2008 Vegetation and wetlands, SNC-Lavalin inc. 2015a Project: File: SL f3-1-vegmine an-F00.mxd '30" 73 37' 73 36'30" 73 36' 73 35'30" 73 35' 150 m Figure 3-1 February 2017 S:\PROJ\624572_Glencore_Raglan_ESIA_WP11_Environment\4.0_Réalisation\4.5_SIG\GEOMATIQUE\interne\diffusion\produits\624572_026_Changement_sequence\SL f3-1-vegmine an-F00.mxd 75 1:7,500 UTM projection, Zone 18, NAD '30"

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25 In addition, five traditional-use plants were identified in the Sector 8 core study area and the expansion of the tailings site. In addition, to cottongrass, which is scarcely used but is generally abundant in the wetlands, these plants are not sufficiently abundant in the core study areas to be considered as harvesting sites of interest, especially since the most popular plants, i.e. the small fruits (cranberries, cloudberries, crowberries and bearberries), are absent Fauna The small number of intermittent watercourses present in the study area and the very coarse substrate with which their bed is covered considerably reduce the probability of finding benthic wildlife in this type of environment. With regard to fish, no detailed inventory was made in the core study areas. However, the potential presence of habitats for the main species likely to be found in these areas, i.e. the Arctic Char, was conducted (SNC-Lavalin inc. 2015). The observations made during the complementary inventories conducted in 2014 suggest that the watercourses present in the study area are almost continuously dry. As for the few small water bodies present there, they are isolated. The presence of habitats suitable for fish throughout the year, in particular for spawning purposes, is therefore considered unlikely in this core study area. As far as birds are concerned, only three waterfowl species and two other water bird species were listed on the Raglan Mine property during the 2008 inventories (SNC-Lavalin inc. 2015). These are the Canada Goose, the Long-tailed Duck (kakawi harelde), the Red-breasted Merganser, the Red-throated Loon and the Herring Gull. The Mining Project 8 core study area is of little interest to this species group because of the low quality of the habitats present there. Besides, no birds of prey were observed in the local study area of the Raglan Mine property during the various aerial and ground (transects) inventories conducted in As for land birds, only five species were spotted in the local study area of the Raglan Mine property in June These species are the Great Raven, the Rock Ptarmigan, the Buff-bellied Pipit, the Lapland Longspur and the Snow Bunting. In addition, the core study area does not overlap with any area that is rich in potential habitats for the Marsh Owl and the Narrow-beak Phalarope, two special status species that are likely to be associated with the Raglan Mine property. As for terrestrial wildlife other than caribou which use the site occasionally, the main mammal species likely to use the Mining Project 8 core study area are the Ungava Lemming, the Meadow Vole, the Northern Bog Lemming, the Ermine, and the Arctic Fox, the Muskox, the Red Fox, the Grey Wolf, the Polar Bear. The Black Bear could also be observed there, but very occasionally and over a short period of time. These species have very large home ranges. In addition, no amphibian or reptile species were identified in the local study area of the Raglan Mine property during the 2008 inventories (SNC-Lavalin inc. 2015). Likewise, bats are unlikely to be found in the local study area of the Raglan property due to the low potential for suitable habitats. SNC-Lavalin inc All rights reserved. Confidential 15

26 3.4 HUMAN ENVIRONMENT The complete description of the human environment in the Environmental and Social Impact Assessment Report (SNC-Lavalin inc. 2015) remains fully valid despite the change in the mining sequence. The Mining Project 8 core study area is located on the Raglan Mine property. Considering the distance between the mining site and the communities of Salluit and Kanqiqsujuaq, the area is only occasionally frequented by users of the Inuit territory traveling to Donaldson or collecting soapstone (see location in Figure 5-73, SNC-Lavalin inc. 2015). For security reasons, these users must announce their presence and must be escorted as they travel across to the site. SNC-Lavalin inc All rights reserved. Confidential 16

27 4 IMPACT ANALYSIS The environmental and social impacts analysis related to the change in mining sequence has been updated for certain environmental and social components that could be affected in the following subsections: 4.1 AIR QUALITY A change in the mining sequence of the new Phase II and III mining sites would not lead to changes in the air quality impacts assessment presented in the Supplementary Air Quality Report (Section of Raglan Mine Project s Environmental and Social Impact Assessment, SNC-Lavalin inc. 2015). Regardless of the sequence of mine sites operated and the method used to assess impacts on air quality, the anticipated changes or impacts on air quality around the sites would still be considered as high magnitude, site-specific extent and long duration with overall moderate significance. The mitigation measures would remain the same as those proposed and the residual impact would still be of moderate significance. From an air emissions standpoint, operating Mining Project 8 instead of Donaldson results in a significant reduction in ground transportation-induced emissions due to the reduced distance between the extraction sites and the Katinniq concentrator. With regard to the maximum concentrations calculated near the mine sites, the scenario already considered for Mining Project 14 is still a worst-case scenario since it considers the maximum annual production that could be achieved on the same site (1,265 Mtpa). For the Katinniq site, the modeling results are independent of the mining sequence of the new sites, since the concentrator s processing capacity remains the same. Although there may be changes in maximum ground concentration patterns due to Mining Project 8 being close to the Mining Project 14 and Katinniq sites, the cumulative effects would be mostly felt at average concentrations in the long term, whereas the air quality issue is linked to short-term events occurring near the sites. In addition, with the absence of sensitive receptors in a large area surrounding Raglan Mine s current and future mining operations, changes in modeling results would occur in areas where air quality standards are not applicable. For all these reasons, the dispersion studies already produced for Katinniq and Mining Project 14 suffice to judge air quality impacts related to changes in the mining sequence of the new sites. 4.2 WATER QUALITY A change in the mining sequence of the new Phase II and Phase III mining sites and the shifting of the location of certain surface facilities from the old Sector 8 site to the Qakimajurq Mine would not change the overall surface water quality impacts assessment presented in Section of the Raglan Mine Project s Environmental and Social Impact Assessment (SNC-Lavalin inc. 2015). Thus, regardless of the mining sequence used on the mine sites operated and the method used to assess impacts, the surface water quality changes or impacts anticipated around the sites during the construction period would still be described as low-magnitude, sitespecific extent and short duration, with overall low significance. The mitigation measures would remain the same as those proposed and the residual impact would still be of low significance. This would also be the case during the operation period with the magnitude of the impact being generally low (moderate or high for the core areas), of local extent overall (site-specific for the core study areas) and long duration while being of moderate significance. The mitigation SNC-Lavalin inc All rights reserved. Confidential 17

28 measures would remain the same as those proposed and the residual impact would still be of moderate significance. Mining Project 8 is designed to allow for the use of the existing surface infrastructure and the portal of the Qakimajurq Mine currently in operation. The new facilities would consist primarily of a waste rock dump and a collector basin and two roads to access the new ventilation raises. As a result, the Mining Project 8 footprint would be smaller than the old Sector 8 footprint in which a new access road, a new ore pile, a new surface infrastructure platform and a new portal were planned. In comparison, Mining Project 8 would require a surface area of 7.8 ha to accommodate new developments, while the Sector 8 required 9.6 ha. For the construction period, impacts on the Mining Project 8 core study area would be less significant that for Sector 8 due to the reuse of previously developed areas and the minimization of areas occupied by new developments. With respect to the operation period, impacts on the core study area are not significantly different because the operations conducted remain the same. The water collected in the new collector basin of the new waste rock dump would be used to meet the water requirements for underground operations, while the surplus would ultimately be directed to the Katinniq wastewater treatment system. 4.3 RIVIERE-AUX-FEUILLES HERD (RFH) A change in the mining sequence of the new Phase II and Phase III mining sites and the shifting of the location of certain surface facilities from the old Sector 8 site to Mining Project 8 would not change the assessment of impacts on the RFH presented in Section of the Raglan Mine Project s Environmental and Social Impact Assessment (SNC-Lavalin inc. 2015). Thus, regardless of the mining sequence used on the mine sites operated, the exact location of the surface infrastructure, and the method used to assess the impacts, the changes or impacts anticipated on the RFH around the sites, during the construction period, would still be classified as low-magnitude, site-specific extent and short duration with an overall low significance. In fact, these changes are very localized in space with respect to caribou movements across the landscape. The mitigation measures would remain the same as those proposed and the residual impact would still be negligible to low. The same would apply to the operation period as the magnitude of the impact remains low, with site-specific extent, a medium duration, and an overall low significance. The mitigation measures would remain the same as those proposed and the residual impact would still be negligible to low. 4.4 FISH A change in the mining sequence of the new Phase II and Phase III mining sites and the shifting of the location of certain surface facilities from the old Sector 8 site to Mining Project 8 would not change the assessment of impacts on the Arctic Char, nor on the fish in general. Regardless of the mining sequence used on the mine sites operated and the method used to assess impacts on fish fauna, the changes or impacts anticipated on this component and around these sites would be equivalent. Thus, the changes or impacts anticipated during the construction period would be low-magnitude, site-specific extent and medium duration and overall low significance. The mitigation measures would remain the same as those proposed and the residual impact would still be of low significance. As far as the operation period is concerned, the magnitude of the impact remains low with a local extent and with the same long-term duration and an overall SNC-Lavalin inc All rights reserved. Confidential 18

29 moderate significance. The mitigation measures would remain the same as those proposed and the residual impact would be of moderate significance. 4.5 IMPACTS ON THE HUMAN ENVIRONMENT The change in the mining sequence will not modify impacts on the human environment as described in the Environmental and Social Impact Assessment, in terms of socio-economic benefits, quality of life, land use or archaeological heritage. However, if the change in the mining sequence described above was more beneficial to Raglan Mine, the financial guarantees and royalties paid to the communities could be more beneficial to the communities of Salluit and Kangiqsujuaq who are beneficiaries of the Raglan Agreement. In addition, the improved profitability of mining operations induced by this mining sequence change will make operations more stable in the event of nickel prices decreasing, which is also positive in terms of financial guarantees and royalties, but also in terms of maintaining jobs and Inuit people training, as well as contracts awarded to local businesses by Raglan Mine. The commitments made by Raglan Mine through the mitigation measures presented in the Environmental and Social Impact Assessment (SNC-Lavalin inc. 2015) and/or added thereto following discussions with the Sivumut Sub-Committee will be retained. SNC-Lavalin inc All rights reserved. Confidential 19

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31 5 CONCLUSION A change in the mining sequence of the new Phase II and Phase III mining sites and the shifting of the location of certain surface facilities from the old Sector 8 site to Qakimajurq mine would not affect the overall environmental and social impact assessment presented in the Environmental and Social Impact Assessment Report (SNC-Lavalin inc. 2015). Similarly, the analyzes and conclusions contained in the atmospheric emission and atmospheric dispersion study reports for Mining Project 14 and the Katinniq Project submitted in December 2016 and the Supplementary Report on Air Quality submitted in January 2017 are still valid. Minor improvements are expected in terms of air quality (reduced surface trucking distances) and water quality (reduction in the surface area required for surface mining facilities). Similarly, a possible increase in the profitability of mining operations would result in positive impacts on the human environment (increase in financial guarantees and royalties, maintenance of jobs, training and contracts). SNC-Lavalin inc All rights reserved. Confidential 21

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