James Bay Lithium Mine Project

Home , Eastmain River, James Bay, James Bay Road

PROJECT NO.: 191-01753-00 JAMES BAY LITHIUM MINE PROJECT ANSWERS TO PRECISION REQUEST ON ANSWER TO QUESTIONS (1ST SERIES) RECEIVED FROM THE CANADIAN ENVIRONMENTAL ASSESSMENT AGENCY AS PART OF THE ENVIRONMENTAL REVIEW OF THE PROJECT

DECEMBER 2019

JAMES BAY LITHIUM MINE PROJECT ANSWERS TO PRECISION REQUEST ON ANSWER TO QUESTIONS (1ST SERIES) RECEIVED FROM THE CANADIAN ENVIRONMENTAL ASSESSMENT AGENCY AS PART OF THE ENVIRONMENTAL REVIEW OF THE PROJECT

GALAXY LITHIUM (CANADA) INC.

PROJECT NO.: 191-01753-00 DATE: DECEMBER 2019

WSP CANADA INC. 1135 LEBOURGNEUF BOULEVARD QUÉBEC, QUEBEC G2K 0M5 CANADA T: +1-418-623-2254 F: +1-418-624-1857 WSP.COM

SIGNATURES

PREPARED BY

December 20, 2019 Dominique Thiffault, B.Sc. Geographer Date Project Manager WSP Canada Inc.

December 20, 2019 Christine Martineau, M.Sc. Biologist Date Project Director WSP Canada Inc.

APPROVED BY

December 20, 2019 Gail Amyot, Eng. M.Sc. (OIQ No. 31050) Date Director Environment, Health and Safety Galaxy (Lithium) Canada inc.

This report was prepared by WSP Canada Inc. for the account of GALAXY LITHIUM (CANADA) INC., in accordance with the professional services agreement. The disclosure of any information contained in this report is the sole responsibility of the intended recipient. The material in it reflects WSP’s best judgement in light of the information available to it at the time of preparation. Any use which a third party makes of this report, or any reliance on or decisions to be made based on it, are the responsibility of such third parties. WSP accepts no responsibility for damages, if any, suffered by any third party as a result of decisions made or actions based on this report. This limitations statement is considered part of this report. The original of the technology-based document sent herewith has been authenticated and will be retained by WSP for a minimum of ten years. Since the file transmitted is now out of WSP’s control and its integrity can no longer be ensured, no guarantee may be given with regards to any modifications made to this document.

JAMES BAY LITHIUM MINE PROJECT WSP ANSWERS TO PRECISION REQUEST ON ANSWER TO QUESTIONS (1ST SERIES) RECEIVED FROM THE CANADIAN NO. 191-01753-00 ENVIRONMENTAL ASSESSMENT AGENCY AS PART OF THE ENVIRONMENTAL REVIEW OF THE PROJECT GALAXY LITHIUM (CANADA) INC. – DECEMBER 2019

PRODUCTION TEAM

GALAXY LITHIUM (CANADA) INC.

General Manager Canada Denis Couture, Eng.

Director Health, Safety and Environment Gail Amyot, Eng. M.Sc.

Director Corporate Affairs and Sustainable Development Gillian Roy, B.A.

WSP CANADA INC. (WSP)

Project Manager Christine Martineau, M.Sc.

Main Technical Advisor Dominique Thiffault, B.Sc.

Main collaborators Alain Chabot, D.E.C. Fauna Marc Gauthier, Ph.D., Fauna Andréanne Hamel, Eng., M.Sc., Hydrogeology Maria Cristina Borja Vergara, B.Sc., Cumulative Effects Fannie McMurray-Pinard, ing., Soils and Geochemistry Marie-Eve Martin, M.Urb., Human Environment Isabelle Liard, ing., Air, Site Characterisation Michel Bérubé, M.Sc., Cumulative Effects Jean Deshaye, Biol. Flora Olivier Houde, Eng. Jean-David Beaulieu, Economist Pascal Rhéaume, Eng. M.Sc., Air Jean-Pierre Vu, Eng., Noise Patrick Couture, Eng. Jean-Philippe Martin, Ph.D. Climate Change Pierluc Marcoux-Viel, M.Env., Fauna Joanie Tremblay, Geomorphologist Rémi Duhamel, M.Sc., Fauna Julia Dents, Geochemist Samuel Bottier, M.Sc., Hydrogeology Julie McDuff, M.Sc., Fauna Simon Dagher, Eng., Mine Wastes and Water Julien Poirier, Eng., Air Steve St-Cyr, Eng., Soils and Geochemistry Karine Neumann, M.A., Human Environment Sylvain Marcoux, Eng. MBA, GHG Laurence Dandurand-Langevin, M.A., Human Environment Véronique Gravel, Biologist Marc Deshaies, Eng., M.Sc., Noise Yann Chavaillaz, Ph.D, Climate Change

Mapping Annie Masson, D.E.C.

Editing Cathia Gamache

Reference to be cited:

WSP. 2019. JAMES BAY LITHIUM MINE PROJECT. ANSWERS TO PRECISION REQUEST ON ANSWER TO QUESTIONS (1ST SERIES) RECEIVED FROM THE CANADIAN ENVIRONMENTAL ASSESSMENT AGENCY AS PART OF THE ENVIRONMENTAL REVIEW OF THE PROJECT. REPORT PREPARED FOR GALAXY LITHIUM (CANADA) INC. 82 PAGES AND APPENDICES.

FOREWORD

As part of the review of the Environmental Impact Study (EIS) for the James Bay Lithium Mine Project, the Canadian Environmental Assessment Agency (CEAA)1 submitted on June 27, 2019 a list of questions and comments. Aftewards, a request to clarify some anwers provided for this first series of questions was received on November 12, 2019. This document is the fourth addendum to the EIS of this project, the first addendum being the one submitted to the CEAA as part of the concordance phase, the second one being the one submitted to the MELCC as part of their first information request, and the third being the answer to the CEAA on the first series of official questions. In this document, the clarification request refer to the CEAA’s first series of questions and comments (received on June 27, 2019), and they are integrally presented in a box and in bold type to easily distinguish them in the text from the answers provided. A code and a number are associated with each of the questions or comments (CEAA-1, CEAA-2, etc.) and with each of the answers provided (AD-A-1A, AD-A-1B, AD-A-2, etc.) in order to facilitate any follow-up. Finally, the maps and appendices supporting the answers to each of the questions or comments are also numbered according to the code and number to which they refer (for example: AD-A-4 for appendices, R-AD-ACEE-6 for maps).

NOTE TO THE READER This document was translated from the original French version. Therefore, the French version constitutes the official version. In case of conflict of interpretation between the English and French versions, the French version prevails.

1 Impact Assessment Agency of Canada since August 28, 2019.

TABLE OF FOREWORD ...... III CONTENTS GENERAL DESCRIPTION OF THE PROJECT ...... 1 REFERENCES ...... 81

TABLE OF MAPS MAP R-AD-ACEE-12 LOCALISATION OF BORROW CONTENTS PITS AND QUARRIES ...... 5 MAP R-AD-ACEE-14 PROPOSED LOCATION FOR (continued) POTABLE WATER WELLS ...... 9 MAP R-AD-ACEE-32 EMERGENCY SPILLWAY LINE ...... 17 MAP R-AD-ACEE-35-38-1 WATER MANAGEMENT STRUCTURE DURING CONSTRUCTION PHASE (YEAR -1) ...... 21 MAP R-AD-ACEE-35-38-2 WATER MANAGEMENT STRUCTURE DURING OPERATION PHASE (YEAR 3) ...... 23 MAP R-AD-ACEE-35-38-3 WATER MANAGEMENT STRUCTURE DURING EXPLOTIATION PHASE (YEAR 5) ...... 25 MAP R-AD-ACEE-35-38-4 WATER MANAGEMENT STRUCTURE DURING OPERATION PHASE (YEAR 10) ...... 27 MAP R-AD-ACEE-35-38-5 MINE SITE AFTER REHABILITATION ...... 29 MAP R-AD-ACEE-37 SANITARY EFFLUENT LINE ...... 33 MAP R-AD-ACEE-41 COMPLETE PATH OF THE MINE WATER ...... 37 MAP R-AD-ACEE-78-1 POTENTIAL HABITAT OF SHORT- EARED OWL AND SURVEY SITES ...... 45 MAP R-AD-ACEE-78-2 POTENTIAL HABITAT OF RUSTY BLACKBIRD AND SURVEY SITES ...... 47 MAP R-AD-ACEE-78-3 POTENTIAL HABITAT OF COMMON NIGHTHAWK AND SURVEY SITES ...... 49 MAP R-AD-ACEE-78-4 POTENTIAL HABITAT OF OLIVE- SIDED FLYCATCHER AND SURVEY SITES ...... 51 MAP R-AD-ACEE-78-5 POTENTIAL HABITAT OF BANK SWALLOW AND SURVEY SITES ...... 53 MAP R-AD-ACEE-96-1 TRAPLINE ...... 59 MAP R-AD-ACEE-96-2 SOCIAL ENVIRONMENT COMPONENTS ...... 61 MAP R-AD-ACEE-116 REGIONAL LOCATION OF THE MINE SITE ...... 77

WSP JAMES BAY LITHIUM MINE PROJECT NO. 191-01753-00 ANSWERS TO PRECISION REQUEST ON ANSWER TO QUESTIONS (1ST SERIES) RECEIVED FROM THE CANADIAN PAGE VI ENVIRONMENTAL ASSESSMENT AGENCY AS PART OF THE ENVIRONMENTAL REVIEW OF THE PROJECT GALAXY LITHIUM (CANADA) INC. – DECEMBER 2019

TABLE OF APPENDICES AD-A-31 GEOCHEMICAL STUDY CONTENTS AD-D-34 EFFLUENT DISCHARGE OBJECTIVES (FRENCH ONLY)

(continued)

GENERAL DESCRIPTION OF THE PROJECT

CEAA-6 ALTERNATIVE ANALYSIS METHODOLOGY—CATEGORY WEIGHTING

The proponent must explain how the various considerations and weight assigned to each indicator in a category were determined. AD-A-6: In addition to the response to CEAA-6 provided previously, we can mention that the assessment of alternative analysis is an exercise that took place during the pre-project period, completed by a group of experienced professionals who have a good understanding of the components of the project and who have in depth expertise of alternative analysis for mining projects in Nordic environments in Quebec and in impact assessment. The weighting attributed to each of the indicators within a given group were arbitrarily assigned by the project team. The weightings assigned to various criteria were selected and agreed upon by the technical experts involved in the alternative analysis and Galaxy representatives. Details regarding how discussions unfolded according to experts were not consolidated. As a result, no additional information is available.

CEAA-11 PROJECT DESCRIPTION—MINE LAYOUT

The proponent must provide the location of the concrete batch plant. If the location is unknown, the proponent must provide the various location scenarios. AD-A-11:

The mobile cement factory will be installed in the storage area located in the industrial sector (Map R-AD-ACEE-14) and will only be operated during the frost-free period of construction. Details regarding the operation of the mobile cement factory will be presented at the time of the request for the certificate of authorization required for it’s operation. The details available at this stage of the project were presented in the previously submitted response document at R-13.

CEAA-12 PROJECT DESCRIPTION—QUARRIES AND BORROW PITS

A) and B) The proponent must describe the various options considered for operating potential quarries and borrow pits situated outside the project’s footprint, including, for each potential quarry and borrow pit, its area, the location of access roads, water management and a description of its operation in general. The proponent must integrate these options into the environmental impact analysis, indicate the mitigation measures necessary to reduce these impacts and, where applicable, integrate them into the analysis of the project’s cumulative effects. AD-A-12: The borrow material requirements were established during the development of the feasibility study and are reported in Figure AD-A-12.

Figure AD-A-12 Borrow material requirements for the year 0 of the mine life

The clear and crushed gravel as well as the riprap will be produced from the diabase intercepting the ore deposit located on the mining property. A quarry-type operating lease (BEX) will be requested from the MERN for this purpose. This quarry is located within the project's footprint and the impacts of its exploitation have been assessed and integrated into the project's impacts. Leaching testing are currently underway to determine how these materials can be used (see AD-A-31). The till as well as the mixed sand and gravel required to build the site's infrastructure will mainly come from the borrow pits located in the project’s footprint and shown on Map 4-4 of the EIS. The volumes of the borrow material were evaluated by photointerpretation during the impact study. Since then, a study including a field visit has been conducted to confirm the nature and quality of materials as well as to assess more accurately the volumes available.

Based on the most recent study, it appears that the materials of PBS-14 (till) and PBS-8, 9 and 11 (sand and gravel) would be sufficient to meet the additional needs for unconsolidated materials for the entire construction works. Their location and area are shown on Map R-AD-ACEE-12. The access roads to these borrow pits are existing and the pits themselves have already been partially opened. Some of these pits are not currently under lease (reference on GESTIM). The areas of these borrow pits as well as the access roads have already been partially impacted. The potential impacts of opening and exploiting the borrow pits are: habitat loss, decline in surface water quality, dust emission and disturbance by human activity and noise, as well as the risk of spills (water and soil quality). The main impact related to opening or expanding the borrow pits and access roads is habitat loss. Indeed, the exploitation of these sites will overlap on small areas of land and will require the construction of a stream crossing (CE-05) for accessing PBS-14. Maximum usable areas are shown in Table A-AD-12. However, this is not the totality of the borrow pits (about 25%) that will be exploited because their capacity exceeds the needs of the project. It is important to note here that the exploitation of borrow pits located on public lands is not exclusive to Galaxy; the MERN manages the opening of borrow pits and the utilization of materials in collaboration with the MELCC and COMEX.

WSP JAMES BAY LITHIUM MINE PROJECT NO. 191-01753-00 ANSWERS TO PRECISION REQUEST ON ANSWER TO QUESTIONS (1ST SERIES) RECEIVED FROM THE CANADIAN PAGE 2 ENVIRONMENTAL ASSESSMENT AGENCY AS PART OF THE ENVIRONMENTAL REVIEW OF THE PROJECT GALAXY LITHIUM (CANADA) INC. – DECEMBER 2019

Table A-AD-12 Area potentially impacted by the exploitation of additional borrow pits

SITE ACCESS ROADS1 (HA) BORROW PIT (HA) POTENTIAL VOLUME (M3) PBS-8 0.78 17.9 537,000 PBS-9 24.3 607,500 PBS-11 16.7 417,500 3.4 PBS-14 115.5 2,310,000 TOTAL2 174.3 3,872,000 Note 1 : A deforestation width of 12 m was considered for the new access roads and an additional 4 m for the existing roads with a current width of about 8 m. Note 2 : Represents the maximum area assuming that the entire borrow pits will all be used.

Water quality will be protected with the same mitigation measures as for working near watercourses, as identified in the impact study for the construction of stream crossing. The site will be enclosed by a ditch and water will be directed towards the vegetation, more than 15 m from any stream to prevent discharges of particulate matter into a natural stream. If necessary, a dust suppressant (water) could be used to reduce the effects of dust. The same requirements for proper operation and prevention/control of spills will be applied to the borrow pits.

Applications for non-exclusive leases (NELs) to the MERN and authorization from the MELCC will be made in a timely manner. All specific information related to work description, potential environmental effects and mitigation measures will be described in these applications. Galaxy is committed to implementing best practices in the field for the exploitation of these borrow pits.

! ! 356 000 360 000 364 000

Lac CE2 !

Asiyan ! Akwakwatipusich Composantes du projet / Project Components

! Route d'accès potentielle / Potential access road

BE-06 ! Route d'accès existante / Existing access road CE6 ! Source de matériaux d'emprunt /

! Borrow sources BE-10 BE-07

! Carrière /

BE-09 Quarry BE-08 ! BE-11 CE3 Lac Infrastructures minières /

CE4 Mining infrastructure ! Kachiskamikach Lac Asini

Kasachipet !

Infrastructures / Infrastructure Lac !

Kapisikama ! Route principale / BE-12 Principal road

! Route d'accès / Access road

BE-15 BE-13 ! Ligne de transport d'énergie / Transmission line

Existant BE-14 !

! ! Relais routier /

 Truck stop !

CE5 km 381

! !

5 000 788 5 PBS-14 000 788 5

! !

450 kV (4003-4004)

! !

Route Jamesde la Baie-James Bay road

! Mine de lithium Baie-James /James Bay Lithium Mine

Réponses aux questions de l'ACÉE / ACEE Requests ! Carte / Map R-AD-ACEE-12

! Localisation des bancs d'emprunts et des carrières / Localisation of

! Borrow Pits and Quarries

Sources : ! !

! !

Orthoimage : Galaxy, août / august 2017 !

PBS-10 Données du projet / Project data : Galaxy, 2018 ! !

Fosse, carrière et entreposage des explosifs / !

! !

Pit, quarry and explosives magasine : Mining Plus, 2018 !

! 5 000 784 5 000 784 5 !

Secteur administratif et industriel et aire de minerai / ! !

Administrative and industrial sector and ROM pad : Primero, 2018 !

Banc d'emprunt / Borrow pit, Stantec, 2019 ! !

PBS-8 !

! !

! ! !

! !

0 185 370 m !

! ! !

! !

UTM, fuseau 18, NAD83 !

! ! !

! !

Vers Matagami / ! !

! !

To Matagami !

! !

Dessin : A. Masson ! !

! !

! Approbation : C. Martineau ! !

! ?

191-01753-00_cR-AD-ACEE_12_wspT270_borrowpit_191218.mxd!

! !

PBS-11 ! !

356 000 360 000 364 000 !

! !

! ! !

! !

CEAA-14 PROJECT DESCRIPTION—WELLS AND DRINKING WATER TREATMENT STATION

B) The proponent must provide the various scenarios considered for the required work on the drinking water treatment station in the operating phase.

C) The proponent must provide the various scenarios considered for the location of the pipe associated with the drinking water treatment station in the operating phase. AD-A-14: B) There are no various scenarios considered for the required work on the drinking water treatment station. Once wells are drilled, the water quality will be tested in accordance with the drinking water regulations and treated, if necessary, as required by the regulations. This type of drinking water treatment station generally includes a sand filter, and an ultraviolet treatment to eliminate bacteria that might be present, and other specific components depending on the elements to be controlled. Therefore, Galaxy undertakes to comply with all regulations in force to ensure the quality of drinking water on the site; the health of its employees is a priority. C) The optimal and shortest possible route will be prioritized for the two water pipes. These water lines will be buried between the two wells and the drinking water treatment station. Map R-AD-ACEE-14 shows the optimal route for the pipes from the two drinking water wells to the drinking water treatment station (site No. 31), located in the administrative sector. It is important to once again mention that detailed engineering is not completed at this stage of the project and will not be completed, for economic reasons, until after authorizations (governmental and corporate) for the construction of the project are obtained.

Usine à béton (!1 Route de la mine / Mine road (!11 Halde à minerai / ROM pad Route vers l'atelier mécanique / Déchargement de minerai / Material unloading  2 (!12 CE2 (! Mechanical workshop road  (!13 Concasseur primaire / Primary crusher Route vers la halde à stériles / Concasseurs secondaire et tertiaire / (!3 Waste rock stockpile road

CE6 (!14 Secondary and tertiary crushers

X X X X X X X X

3 X !4 Route d'accès / Access road 1 ( !15 Dôme de minerai concassé / Crushed material dome 41 Stationnement des véhicules légers / (

Concentrateur / Concentrator X (!5 Light vehicle parking (!16 Épaississement des résidus / CE4 Stationnement des véhicules lourds / (!17 Tailings thickening

Lac Lac 11 X (!6 Réservoirs d'eau / Asini Kasachipet Kapisikama Heavy vehicle parking (!18 Water tanks

CE3 7 Balance / Weightbridge 19 Dôme de concentré / Concentrate dome 10X (! (! Ligne de transport d'énergie (69 kV) / !20 Zone de chargement / Loading area

(!8 Transmission line (69kV) ( X Stockage temporaire de résidus miniers /

9 Poste haute tension / High-voltage switchyard (!21 Temporary storage for tailings

X X X X X X X X X (!

X X 10 Clôture / Fence Convoyeur semi-couvert / Semi-covered conveyor 12 21 (! (!22

CE5 0 0,55km Convoyeur couvert / Covered conveyor

X 23 X (! Entrepôt à produits pour le SMD et l'UTE /

X (! DMS and WTP products warehouse 13 40 X 22 Entrepôt à matières résiduelles /

14 25

X (! Residual material warehouse X

(!26 Entrepôt / Warehouse X

X 27 Ateliers / Workshops 22 (!

Laboratoire / Laboratory

X 28 23 X (! 36 Administration et services médicaux /

!29 X ( Administration and medical services X

32 (!30 Guérite / Gatehouse

X X Gestion de l'eau potable et eaux usées / 22

(!31 Drinking water and wastewater management X

X (!32 Bassin de sédimentation / Settling pond

19 Dortoirs de la construction (temporaire) / X X 33 23 20 (! Construction dormitories (temporary)

Dortoirs /

X Dormitories X X X X X X X 24 X (!34

2 16 X (!35 Cafétéria et aire de repos / Cafeteria and lounge

X 36 Réservoirs de propane / Propane storage X (! 33

37 Réservoirs de diesel / Fuel storage X ! (!

! 31 X 17 Atelier mécanique / Mechanical workshop

26 (!38

X Entrepôt à pièces mécaniques / 15 23 X (!39 Mechanical warehouse

(!40 Chargement de résidus miniers / Tailings loading X X  18 Route vers l'usine de traitement de l'eau /

27 (!41 X Water treatment plant road

X 25 Puits d'alimentation en eau potable /

X !( Potable water wells

X X X 5

X X Usine à béton /

35 X Concrete batch plant

X 10X X 29 Conduite souterraine d'eau potable /

X Underground drinking water line

X 5 9 7

X X X X 28 X

X X

37 XX X

X 38

X X 30 X X X X X X X X X X X X X X X X X Mine de lithium Baie-James /James Bay Lithium Mine

X 39 X

Réponses aux questions de l'ACÉE / ACEE Requests

X X X

X Carte / Map R-AD-ACEE-14

! ! X

X ! ! ! Localisation proposée pour les puits X

X d'alimentation en eau potable /

X X X Proposed Location for Potable Water Wells X

 X X

X 34 Sources : X 4 X Données du projet / Project data : Galaxy 2018

X X X X X X X X X X X 10 8 X

X X 6 X X 0 17,5 35 m X

X X X X UTM, fuseau 18, NAD83 X

X X X X X Dessin : A. Masson Approbation : C. Martineau 191-01753-00_cR-AD-ACEE_14_wspT259_conduite_191212.mxd

CEAA-17 PROJECT DESCRIPTION—INFRASTRUCTURE AND ACTIVITIES RELATED TO EXPLOSIVES

A) The proponent must provide a description (location, role, activities) of the infrastructure related to the manufacture and use of explosives. AD-A-17: As mentioned in the response to the previous questions, the infrastructure related to the manufacturing of explosives (Explosives Warehouse) is demonstrated on Map 4-1 of the EIS. This zone is shown again on most of the maps of this document, including Maps R-AD-ACEE-35-38-1 to 5 which show water management throughout the mine site. The manufacturing and use of explosives is highly regulated and will not be carried out directly by Galaxy but by a certified subcontractor who must apply for a permit. The work carried out by the subcontractor will be supervised by Galaxy. Galaxy is considering working with Dyno Nobel or Orica, who have extensive experience in the field. The explosives used are of the ANFO (Ammonium-nitrate-fuel-oil) type. The manufacturing of explosives is fairly standard. At the storage site, there will be separate tanks for gasoline (fuel) and nitrate. The detonators will be stored at the storage site in a special room kept under controlled access, as required by the regulations and will not be transported at the same time as the explosives, or they will be transported in separate sealed cases. Mixing will be done only before use, directly in the blast hole and not at the storage site. Packaged emulsions, purchased as is from the manufacturer, will be used on rainy days.

CEAA-19 PROJECT DESCRIPTION—MANAGEMENT OF RESIDUAL MATERIALS AND HAZARDOUS WASTE

A) The proponent must provide a layout diagram of the storage areas for the different categories of hazardous waste listed in Tables 4–23 and 4–24 of the EIS.

B) The proponent must specify the mode, duration and capacity of on-site storage for each category of residual materials and hazardous waste.

C) The proponent must indicate how it plans to ensure the sealing of the storage areas and the safety of the premises.

AD-A-19: A) Planning hazardous waste storage areas We understand that the question refers only to Table 4-24 (Estimated annual quantity of hazardous waste) of the EIS because Table 4-23 of the EIS has to do with non-hazardous residual materials. Hazardous waste (residual hazardous materials; RHM) will be stored in the warehouse intended for this purpose (site no. 24 on Map 4-2 of the EIS). Residual hazardous materials will be separated according to their category, as shown in Table 4-24 of the EIS: household, oils and greases, and residual materials. A sign indicating the category will be installed to properly identify the type of hazardous waste and to avoid any confusion during handling, as required by best practises as well as current regulations (Hazardous Materials Regulation; HMR). The HMR applies to the storage of residual hazardous materials. The following measures will therefore be taken:

— the storage site will be planned and maintained to be accessible at all times to emergency teams; — exterior access paths to the storage site will be provided and usable;

— storage building doors will always be operational; — the building will be laid out so that the doors and passageways are always free. RHM may be arranged in islands depending on the compatibility of the materials. The following aspects will also comply with the regulation:

— the number of islands must equal the number of incompatible groups; — separation distances or walls between the islands; — dimensions of passageways for accessing the islands and their compliance so that material-handling vehicles may pass through — use of containers for incompatible liquid materials with separate holding tanks for each liquid material. To set up islands, the following will also be taken into consideration:

— width and height of the islands in order to facilitate identifying materials, viewing containers and evaluating quantities; — height to ensure worker safety, fire prevention and the stability of the stacks (to prevent collapsing); — clearances for handling, height of building roofs, operation of sprinklers and detection systems (fire, gas or other) or any other system or equipment inside the building. Regarding safety and security at work, the Regulation Respecting Occupational Health and Safety also provides applicable standards on RHM storage, particularly with respect to stacking materials, the strength of building walls, and the stability of the stack. These regulations will also be observed.

Finally, the MELCC may also require certain standards and guidelines according to the Environmental Quality Act and related regulations when issuing provincial environmental permits. B) Management method, duration and storage category for residual materials and hazardous waste Table AD-A-19 presents the information in Sections 4-10-3 and 4-10-4 of the EIS. Residual hazardous materials will be collected by specialized contractors who have permits to do such work. Galaxy is in contact with Ungava Recyclage of Chibougamau, which currently takes care of residual materials (RM) from mining sites in the region, namely Éléonore (partially), Nemaska and Renard. It handles recyclable materials, construction waste, RHM, non-hazardous RM and compostable materials and disposes of them in compliance with regulations. The company will come monthly or more frequently when called, as needed, to empty containers and warehouses for residual materials. Regulations on hazardous materials require that an inventory of the RHM warehouse be taken on a quarterly basis and that RHM not be stored there for more than 12 months. Producers of residual materials therefore benefit from freeing up the warehouse before the quarterly inventory in order to facilitate the task. Galaxy is thinking of minimizing RM production and a good approach is to compost putrescible materials. The addition of a composter is being studied. Such equipment could significantly reduce RM leaving the site. In fact, the composter requires, in addition to the nitrogen supplied by food scraps, a carbon supply, which can easily be provided by soiled cardboard.

WSP JAMES BAY LITHIUM MINE PROJECT NO. 191-01753-00 ANSWERS TO PRECISION REQUEST ON ANSWER TO QUESTIONS (1ST SERIES) RECEIVED FROM THE CANADIAN PAGE 12 ENVIRONMENTAL ASSESSMENT AGENCY AS PART OF THE ENVIRONMENTAL REVIEW OF THE PROJECT GALAXY LITHIUM (CANADA) INC. – DECEMBER 2019

Table AD-A19 Management method, duration and capacity of residual materials storage

RECOMMENDED STORAGE SITE TYPE OF STORAGE AT CATEGORY DESCRIPTION MANAGEMENT (SITE No.) THE SITE METHOD1 Paper/cardboard Recycling

Plastic Recycling or Packaged, Recyclable materials Glass disposal dry storage Metal Recycling Hardware

Compostable material 25 Reuse Food residues Sealed container Cooking grease Disposal

Construction, renovation and Wood, concrete Disposal In a stack outside demolition debris Other (i.e., tires etc.) Recycling On the ground, dry place Voluminous waste, polystyrene foam, Final waste On a sealed surface if Disposal packaging, composite objects, etc. there is oil/grease Separate place with Antifreeze, solvent, aerosols, cylinders, WHMIS-compliant Household hazardous waste paint, fluorescent tubes, lanterns, etc. ventilation and a sealed floor

Used oils, greases, oily water Coming from various machine shops24 Double-floor containers in a ventilated space Disposal Containers of additives used to prepare provided with a concrete and other products used in containment tank, with Residual hazardous materials construction sealed floor Empty containers of chemical products Separate, ventilated used to treat ore and for the WTP space, with sealed flooring Note 1: No material will be eliminated, reused or recycled on site.

C) Impermeability and safety of the site Whether they are for residual materials or for hazardous waste, the measures that are put in place are intended to avoid any discharge or environmental contamination. These measures are compliant with current regulations. Laws and regulations related to the management of residual materials are under provincial jurisdiction under the Environmental Quality Act (EQA) on hazardous materials (chapter Q-2, r.32 ss. 31, 46, 70.19, 115.27, 115.34 and 124.1) and non-hazardous materials (chapter Q-2, r. 35.1 s. 53.4). As the information above indicates, non-hazardous and hazardous residual materials have different management and storage methods. Hazardous materials will be stored on sealed surfaces (site no. 24) and non-hazardous materials that may emit contaminants will be stored in sealed containers. Both warehouses will be dry, protected from the elements and well ventilated. Site safety is described in R-19A.

CEAA-31 SURFACE WATER AND GROUNDWATER—OVERALL IMPACT OF THE PROJECT ON THE QUALITY OF SURFACE WATER AND GROUNDWATER DURING THE DIFFERENT PHASES OF THE PROJECT

A) The proponent must provide results on the project’s impacts on the surface water and groundwater quality of the receiving environment caused by leaching and the risk of acid mine drainage from the ore and overburden stockpiles.

B) The proponent must include the results of the kinetic tests on the ore, the tests on the waste rock/tailings mix and the CTEU-9 test on the overburden in its analysis of the quality of surface water and groundwater, and compare them with the Canadian Water Quality Guideline of the Canadian Council of Ministers of the Environment for the protection of aquatic life for the different phases of the project, as well as the standards in the Metal and Diamond Mining Effluent Regulations to which the mine is subject.

C) The proponent must provide all of the analytical results for the overburden and the ore that show the probability of some of the apprehended impacts, including the results of the long-term kinetic tests to determine, as applicable, the time necessary to trigger mine drainage (acid and/or neutral) or leaching of metals.

D) The proponent must provide a complete study of the mobility of leachable metals and metalloids in order to predict their mobility by runoff from the waste rock stockpiles to their availability in the surface water and their ecotoxicity.

AD-A-31:

A) There is no anticipated impact on the quality of surface and groundwater with respect to the overburden stockpile. The overburden stockpile will be composed of natural soils that will have been excavated and piled without further manipulation; thus, these soils will have no further impact on the quality of surface and groundwater than currently. Groundwater analyses from the site are the best indicator of the water quality that would come in contact with the soil stored on the overburden stockpile. In addition, the concentrations of leached metals for the clay unit are lower than those observed in the leaching tests carried out on waste rock and residues. Since geochemical modelling has demonstrated that the metal concentrations in the effluent meet the applicable criteria, the presence of overburden will have no significant impact on the quality of surface and groundwater (Appendix AD-A-31). Regarding the ROM pad, kinetic tests are underway to confirm the potential for leaching and acid generation. The trials are currently in the 16th week of testing over the planned 25-week period. The results and an interpretation of the findings will be captured in a report once the entire trial period has been completed. In addition, if certain exceedances observed punctually at the beginning of the test (notably copper and mercury) continue, the footprint of the ROM pad would be lined with a waterproof membrane. Runoff water will be collected and managed in accordance with current regulations regardless of whether there is membrane. B) The only rules applicable to overburden in the Metal Mining and Diamond Mining Effluent Regulations (MMDMER) are found in the section on modifications of Schedule 2. Therefore, areas without mining activity or where mining material are not present, have been interpreted by Galaxy as being excluded from the mining although these tests were carried out. To eliminate a controlled effluent, the overburden stockpile was designed without mining material (no waste rock) and with an independent drainage pattern, thus creating an off-site area. Thus, the overburden would not be subject to leaching tests although some tests were conducted.

WSP JAMES BAY LITHIUM MINE PROJECT NO. 191-01753-00 ANSWERS TO PRECISION REQUEST ON ANSWER TO QUESTIONS (1ST SERIES) RECEIVED FROM THE CANADIAN PAGE 14 ENVIRONMENTAL ASSESSMENT AGENCY AS PART OF THE ENVIRONMENTAL REVIEW OF THE PROJECT GALAXY LITHIUM (CANADA) INC. – DECEMBER 2019

If the federal authorities have a different interpretation and the overburden is considered mining material, the overburden would be inserted in a cell independent of the waste rock and ROM pad to be drained towards the main effluent. In this case, the leaching tests already performed will be useful. TCLP and SPLP leaching tests have already been carried out on the overburden (see WSP. 2018a. Baie-James lithium mine, Specialized study on geochemistry. Report prepared for Galaxy Lithium (Canada) Inc. 27 p. And ann .) and provide an indication of the overburden leaching, which is said to be very conservative due to the aggressive nature of these tests. There is therefore no need to perform CTEU-9 tests, which are less aggressive than TCLP and SPLP leaching tests. Thus, no CTEU-9 test will be carried out on the overburden. Since the site is not under federal jurisdiction, it is the regulations and guidelines in force in the province of Quebec that are the criteria applicable to the site. It is therefore not required and of no use to compare the test results to the Canadian Water Quality Guidelines. When the mine is in operation and is subject to the MMDMER, the concentrations measured in the final effluent will be compared to the MMDMER criteria. C) The only rules applicable to overburden in the Metal Mining and Diamond Mining Effluent Regulations (MMDMER) are found in the section on modifications of Schedule 2. Therefore, areas without mining activity or where mining material are not present, have been interpreted by Galaxy as being excluded from the mining although these tests were carried out. To eliminate a controlled effluent, the overburden stockpile was designed without mining material (no waste rock) and with an independent drainage pattern, thus creating an off-site area. Thus, the overburden would not be subject to leaching tests although some tests were conducted. If the federal authorities have a different interpretation and the overburden is considered mining equipment, the overburden would be inserted in a cell independent of the waste rock and ore pile to be drained there into the main effluent. In this case, the leaching tests already performed will be useful. TCLP and SPLP leaching tests have already been carried out on the overburden and provided an indication of the overburden leaching, which is considered very conservative by the aggressive nature of these tests. There is therefore no requirement to carry out kinetic tests on the overburden. Thus, no kinetic test will be carried out on the overburden. With regard to the ore, kinetic tests are underway to confirm the potential of leaching and acid generation from the ore. Trials are currently in the 16th week of testing over the planned 25-week period. Results and interpretation will be reported once the entire trial period is completed. However, it can already be said that the ore has no potential for acid generation. In addition, if certain exceedances observed punctually at the start of the test (notably copper and mercury) continue, the footprint of the ROM pad would be lined with a waterproof membrane. The runoff water will be collected and managed in accordance with current regulations regardless of whether there is a membrane. D) A study of the mobility of leachable metals and metalloids for this project is not necessary. Regarding impacts on groundwater, the design of the waste rock storage facility has been designed not to exceed the percolation rate standard set by Directive 019 of the MELCC. Regarding the water that will leave the tailings pond, the results of the geochemical modeling have shown that no exceedance is envisaged. In the event of concentrations above the criteria (notably for arsenic), a treatment station will be built by Galaxy. The current size of the main collection basin with the addition of temporary basins, if necessary, will conserve water until the treatment station is operational.

CEAA-32 SURFACE WATER AND GROUNDWATER—BREACHES CREATED IN THE STOCKPILES IN THE REHABILITATION PHASE

The proponent must provide the location or the various location scenarios considered for the spillways and breaches, and their dimensions.. AD-A-32: During the restoration phase, the breach will be located at the emergency spillway. The location of the emergency spillway is indicated on Map R-AD-ACEE-32. The size of the opening is about 2 m. The emergency spillway opening is located at a higher elevation than the expected maximum water level in the basin. Its function is to secure the dam in the exceptional case where the water level becomes critical. In the emergency measures plan, it will be provided that, if the water level in the main retention basin approaches the opening of the emergency spillway, the water in the basin will be sampled and consequently treated if necessary before being released to the environment. During the restoration phase, the emergency spillway will be dug to ensure the drainage and natural flow of the restored basin.

Figure AD-A-32 Emergency Spillway

WSP JAMES BAY LITHIUM MINE PROJECT NO. 191-01753-00 ANSWERS TO PRECISION REQUEST ON ANSWER TO QUESTIONS (1ST SERIES) RECEIVED FROM THE CANADIAN PAGE 16 ENVIRONMENTAL ASSESSMENT AGENCY AS PART OF THE ENVIRONMENTAL REVIEW OF THE PROJECT GALAXY LITHIUM (CANADA) INC. – DECEMBER 2019

? Vers/Radisson propriétéde / Limite Property limit To Radisson

Routede la Baie-James Composantes du projet / Project Component CE1

James Bayroad Route / / Route Road Effluent minier / / minier Effluent Mine effluent  Déversoird'urg ence/ Emergency spillway Station de pompde Station age/ Pumping station Site réserv é pour l’installation d’une usine de d’uneusine réserv Site pour é l’installation traitement de l’eaude traitement nécessaire) (si / Water treatment plant reserved site (if necessary) Secteur administratif et industriel / industriel et Secteuradministratif Administrative and industrial sector CE2 Fosse / / Fosse Pit

Déversoir d'urgence / / àmineraiHalde ROM pad Emergency spillway 4 5 0 k V ( 40 03 - 4 0 0 4 ) / àstériles Halde Waste rock stockpile Halde àmatièreHalde org / anique Organic matter stockpile Halde àdépôtsHalde meubles/ Unconsolidated deposit stockpile

Entrepôt à explosifs / / Entrepôtàexplosifs Explosives magazine

Courd'entreposage / Dry storage area CE6 Carrière / Quarry

Digue et berme Digueet / Dike and berm

Bassin de rétention d'eau / / d'eau rétention de Bassin Water retention basin

Câble de fibre optique / / optique Câblefibre de Optical fiber cable

Infrastructures / Infrastructure

CE4 / principale Route Main road Route d'accès / / d'accèsRoute Access road

!! / transportded'énergLigne ie Transmission line

Lac / routier Relais Truck stop Asini Kasachipet P1  CE3 Hydrographie / Hydrography

CE3 Numéro / coursd'eau de Stream number P2 Lac Kapisikama Cours d'eau permanentCours d'eau / Permanent stream Cours d'eau à écoulement diffus ou intermittent / intermittent ou àCoursdiffus écoulement d'eau Intermittent or diffused flow stream

P3 / d'eau Plan Waterbody

Mine de lithium Baie-James /James Bay Lithium Mine Réponses aux questions de l'ACÉE / ACEE Requests

Carte / Map R-AD-ACEE-32 Tracé du déversoir d'urgence / Emergency Spillway Line

Sources : Orthoimage : Galaxy, août / august 2017 Données du projet / Project data : Galaxy, 2018 Fosse, carrière et entreposage des explosifs / Relais routier Relais Pit, quarry and explosives magasine : Mining Plus, 2018 Truck stop Secteur administratif et industriel et aire de minerai / km381 Administrative and industrial sector and ROM pad : Primero, 2018 CE5 0 185 370 m

UTM, fuseau 18, NAD83

Dessin : A. Masson

VersMatagami / Approbation : C. Martineau ? To Matagami 191-01753-00_cR-AD-ACEE_32_wspT260_breche_191216.mxd

CEAA-34 SURFACE WATER AND GROUNDWATER—WATER MANAGEMENT DURING THE CONSTRUCTION PHASE

A) The proponent must provide details (location, methods, schedules) for the construction of the infrastructure associated with watercourse diversion and dewatering activities.

B) The proponent must provide the water quality objectives for the permanent and temporary infrastructure or systems. AD-A-34: A) No diversion or river drainage activity is planned for the project during the construction of the infrastructure. The facilities, and the overall footprint of the mine site, were designed to avoid existing watercourses to minimize the impact on the aquatic environment. A single culvert is planned, spanning CE-03, for the crossing of the access road to the pit and explosives warehouse sectors. As mentioned in R-74 of the previous response document, this culvert will be designed to comply with standard NOR 052 and outside the periods defined by measure FAU 013, described in the EIS. The only body of water that will be drained is Kapisikama Lake. However, the construction work is not the reason this water body will dry up. As mentioned in the previous response document (R-26, R-73), the drying up of Kapiskama Lake will be caused by the drawdown of the water table during the mine's operation phase. A compensation plan will be developed in connection with the loss of habitat caused by this dewatering. As required by Section 101 of the Mining Act, the complete redevelopment and restoration plan will be developed at a later stage, which will consider the fate of this body of water. B) The environmental effluent discharge objectives have been calculated and provided by the MELCC. Galaxy is committed to implementing the necessary measures to meet these objectives. Allocated concentrations have also been outlined by the MELCC with regard to domestic waters. All relevant criteria are presented in Appendix R-AD-34.

CEAA- 35 SURFACE WATER AND GROUNDWATER—MAPPING ILLUSTRATING THE EVOLUTION A) and OF THE INFRASTRUCTURE DURING THE CONSTRUCTION PHASE AND DETAILED CEAA-38 MAPPING OF THE ROUTE OF THE WATER FOR ALL PHASES OF THE PROJECT

A) and B) A) and B) The proponent must map all water trajectories, including those from each pump to the main retention pond. AD-A-35 A) and ACÉE-38 A) and B):

Maps R-AD-CEAA-35-38-1 to R-AD-CEAA-35-38-5 show the site evolution from year -1 until its restoration. During the construction phase, prioritizing the runoff management infrastructure will ensure that the main retention pond and the various ditches will be put in place as soon as access to the site is secured.

2 NOR 05: Instal culverts and stream-crossing structures in such a way to maintain the unobstructed flow of water (and free passage of fish). The construction of bridges or the installation of culverts must not reduce the widht of the watercourse of more than 20%, measured from the NHWL. The base of the lower culvert must be pushed down under the natural water line at a depth of at least 15 cm or 10% of the structure height; its extremities must be larger than the base of the backfill of 30 cm maximum and be efficiently stabilized. Reference: Règlement sur l’aménagement durable des forêts du domaine de l’État. 3 FAU 01 : Carry out work in water outdoors at various spawning periods of encountered species, from September 15th to December 1st inclusively.

Two independent runoff management systems are present on the site. The effluent of the first system is discharged into CE-02 while the effluent of the second system is discharged into CE-03. On the maps previously mentioned, we notice the path of contact water at various meeting points where pumps will collect and redirect the water from the ditches to the main retention pond, i.e., the settling pond bordering the wasterock stockpile. The waters of this first system flow in CE-02. The second system manages the waters that are not entering in contact with materials derived from mining activity. The OPFS1 and OPFS2 pumps redirect the runoff water from the unconsolidated deposit stockpile to the settling pond discharging its effluent in CE-03. On the maps, it is noted that the waters of the first independent system will flow through a point of control and measurement, located near the site allocated for the construction of a water treatment plant (if the results during operations show that water treatment is necessary) before the effluent is discharged in the environment.

WSP JAMES BAY LITHIUM MINE PROJECT NO. 191-01753-00 ANSWERS TO PRECISION REQUEST ON ANSWER TO QUESTIONS (1ST SERIES) RECEIVED FROM THE CANADIAN PAGE 20 ENVIRONMENTAL ASSESSMENT AGENCY AS PART OF THE ENVIRONMENTAL REVIEW OF THE PROJECT GALAXY LITHIUM (CANADA) INC. – DECEMBER 2019

? Limitepropriété de / Property limit VersRadis s/ on Composantes du projet / Project Component To Radisson

CE1 Routede la Baie-James Route / / Route Road

James Bayroad Effluent minier / Effluent Mine effluent

Station de pompagede Station / Pumping station  / Fosscontact de d'eau é Contact water ditch Direction de l'eau / / Directionl'eau de Water direction

Site réservé pour l’installation d’uneréservéusineSite depour l’installation traitement de l’eaudetraitement nécess(si aire) / Water treatment plant reserved site (if necessary) 4 5 0 k V ( 40 03 - 4 0 0 4 ) Secteuradminisindustriel/ et tratif CE2 Administrative and industrial sector

Foss / e Pit

Halde à mineraià Halde / ROM pad

Halde à stériles / stériles/ à Halde Waste rock stockpile

Halde à matièreà Halde organiq / ue Organic matter stockpile

Halde à dépôtsmeublesà Halde/ P2 Unconsolidated deposit stockpile P1 explosifs à Entrepôt/ Explosive magazine CE6 Cour d'entreposage/ Dry storage area

Carrière / Quarry P7 Zone tampon pour la protection d'incendie /d'incendieprotection Zonetampon pour la Buffer area for fire protection P3 Digue et bermeDigue et / Dike and berm P4 Bass in de rétention d'eau / Bass/ d'eau rétention dein Water retention basin CE4 P5 optiqCâblefibre/ de ue Optical fiber cable OSPF2 Infrastructures / Infrastructure

Route principale / principaleRoute/ Main road

Lac d'accèsRoute/ Access road Asini Kasachipet OSPF1 !! Lignetransportded'énergie/ Transmission line

CE3 Relais routier/ Truck stop Lac  Kapisikama Hydrographie / Hydrography

CE3 Numéro / coursde d'eau Stream number

Courspermanent d'eau / Permanent stream Cours d'eau à écoulement diffus ou intermittent / intermittent ou Coursdiffus écoulementà d'eau P6 P3 Intermittent or diffused flow stream Plan d'eau / / d'eau Plan Waterbody

Mine de lithium Baie-James /James Bay Lithium Mine Réponses aux questions de l'ACEE / ACEE Requests

Carte / Map R-AD-ACEE-35-38-1 Infrastructure de gestion de l'eau en phase de construction (Année -1) / Water management structure during construction phase (Year -1)

Sources : Relais routier Orthoimage : Galaxy, août / august 2017 Truck stop Données du projet / Project data : Galaxy, 2018 km 381 Fosse, carrière et entreposage des explosifs / CE5 Pit, quarry and explosives magasine : Mining Plus, 2018 Secteur administratif et industriel et aire de minerai / Administrative and industrial sector and ROM pad : Primero, 2018 0 185 370 m

UTM, fuseau 18, NAD83 VersMatagami /

To Matagami Dessin : A. Masson ? Approbation : C. Martineau 191-01753-00_cR-AD-ACEE_35-38-1_wspT263_const_191218.mxd

? Limite de propriétéde Limite / Property limit VersRadiss / on To Radisson Composantes du projet / Project Component

CE1 Routede la Baie-James

James Bayroad Route / Road

Effluent minier / / minier Effluent Mine effluent  Stationpompagede / Pumping station Pompe mobile / Pompe/ mobile Mobil pump

Foss contactde/ éd'eau Contact water ditch

Direction de l'eau / / l'eau deDirection Water direction

4 5 0 kV ( 4 0 0 3 - 4 0 0 4 ) deusine d’une résSite ervépourl’installation tr aitementl’eau de nécess (si aire) / Water treatment CE2 plant reserved site (if necessary) Secteur/ industretadministratif iel Administrative and industrial sector

Foss / e Pit

Halde à minerai / / àmineraiHalde ROM pad

Halde àstérHalde / iles Waste rock stockpile

Halde àmatièrHalde / organique e Organic matter stockpile P2 P1 àdépôtsHalde meubles / Unconsolidated deposit stockpile CE6 Entr / epôtàexplosifs Explosive magazine P7 Courd'entr eposage / Dry storage area

P3 Carr / ièr e Quarry

P4 bermeetDigue / Dike and berm

Bass rétention/ de d'eau in Water retention basin P5 CE4 / optique fibre deCâble Optical fiber cable OSPF2 Infrastructures / Infrastructure

Route principale / / Routeprincipale Main road Lac Route d'accès/ Access road Asini Kasachipet OSPF1 P1 !! trde ansportLigne / d'énergie Transmission line CE3 P2 Lac  routier/ Relais Truck stop Kapisikama PMob Hydrographie / Hydrography

CE3 Numéro / coursde d'eau Stream number

Courspermanent d'eau / Permanent stream P3 Coursintermittentàouécoulement d'eau / diffus P6 Intermittent or diffused flow stream

Plan d'eau / / d'eau Plan Waterbody

Mine de lithium Baie-James /James Bay Lithium Mine Réponses aux questions de l'ACEE / ACEE Requests

Carte / Map R-AD-ACEE-35-38-2 Infrastructure de gestion de l'eau en phase d'exploitation (Année 3) / Water management structure during operation phase (Year 3)

UTM, fuseau 18, NAD83 VersMatagami /

To Matagami Dessin : A. Masson ? Approbation : C. Martineau 191-01753-00_cR-AD-ACEE_35-38-2_wspT266_exp_yr3_191218.mxd

? Limite de propriétéde / Limite Property limit Vers/Radisson To Radisson Composantes du projet / Project Component

CE1 Routede la Baie-James Route / / Route Road

James Bayroad Effluent minier / / minier Effluent Mine effluent Station de pompde Station age/ Pumping station  Pomp / mobile e Mobil pump Fossé d'eau de contact / / contact de Fosséd'eau Contact water ditch Direction de l'eau / / l'eau de Direction Water direction Site réserv é pour l’installation d’une usine de d’uneusine réserv Site pour é l’installation 4 5 0 k V ( 40 03 - 4 0 0 4 ) l’eaude traitement nécessaire) (si / Water treatment plant reserved site (if necessary) CE2 Secteur administratif et industriel / industriel et Secteuradministratif Administrative and industrial sector

Fosse / / Fosse Pit

Halde à minerai / / àmineraiHalde ROM pad

Halde à stériles / / àstériles Halde Waste rock stockpile

Halde àmatièreHalde org / anique Organic matter stockpile P2 Halde àdépôtsHalde meubles/ P1 Unconsolidated deposit stockpile

CE6 / Entrepôtàexplosifs Explosives magazine

P7 Courd'entreposage / Dry storage area

Carrière / Quarry P3 Digue et berme Digueet / Dike and berm P4 Bassin de rétention d'eau / / d'eau rétention de Bassin Water retention basin

P5 CE4 / optique Câblefibre de Optical fiber cable Infrastructures / Infrastructure OSPF2 Route principale / / principale Route Main road

Route d'accès / / d'accèsRoute Access road Lac Asini Kasachipet OSPF1 P1 !! / transportded'énergLigne ie Transmission line

Relais routier / / routier Relais Truck stop CE3  P2 Lac PMob Kapisikama Hydrographie / Hydrography CE3 Numéro / coursd'eau de Stream number

Cours d'eau permanentCours d'eau / Permanent stream P3 Cours d'eau à écoulement diffus ou intermittent / intermittent ou àCoursdiffus écoulement d'eau Intermittent or diffused flow stream P6 Plan d'eau / / d'eau Plan Waterbody

Mine de lithium Baie-James /James Bay Lithium Mine Réponses aux questions de l'ACEE / ACEE Requests

Carte / Map R-AD-ACEE-35-38-3 Infrastructure de gestion de l'eau en phase d'exploitation (Année 5) / Water management structure during explotiation phase (Year 5)

Sources : Relais routier Relais Orthoimage : Galaxy, août / august 2017 Truck stop Données du projet / Project data : Galaxy, 2018 km381 Fosse, carrière et entreposage des explosifs / CE5 Pit, quarry and explosives magasine : Mining Plus, 2018 Secteur administratif et industriel et aire de minerai / Administrative and industrial sector and ROM pad : Primero, 2018 0 185 370 m

UTM, fuseau 18, NAD83 VersMatagami /

To Matagami Dessin : A. Masson ? Approbation : C. Martineau 191-01753-00_cR-AD-ACEE_35-38-3_wspT267_exp_yr5_191218.mxd

? Limite de propriétéde / Limite Property limit Vers/Radisson To Radisson Composantes du projet / Project Component

CE1 Routede la Baie-James Road James Bayroad / Route Effluent minier / / minier Effluent Mine effluent  pompde Station age/ Pumping station Pomp / mobile e Mobil pump Fossé d'eau de contact / / contact de Fosséd'eau Contact water ditch Direction de l'eau / / l'eau de Direction Water direction Site réserv é pour l’installation d’une usine de d’uneusine réserv Site pour é l’installation 4 5 0 k V ( 40 03 - 4 0 0 4 ) l’eaude traitement nécessaire) (si / Water treatment CE2 plant reserved site (if necessary) Secteur administratif et industriel / industriel et Secteuradministratif Administrative and industrial sector

Fosse / / Fosse Pit

Halde à minerai / / àmineraiHalde ROM pad

Halde à stériles / / àstériles Halde Waste rock stockpile

Halde àmatièreHalde org / anique Organic matter stockpile P2 Halde àdépôtsHalde meubles/ P1 Unconsolidated deposit stockpile CE6 Entrepôt à explosifs / / Entrepôtàexplosifs Explosives magazine P7 Courd'entreposage / Dry storage area

P3 Carrière / Quarry Digue et berme Digueet / Dike and berm P4 Bassin de rétention d'eau / / d'eau rétention de Bassin Water retention basin P5 CE4 / optique Câblefibre de Optical fiber cable

OSPF2 Infrastructures / Infrastructure

Route principale / / principale Route Main road

Lac / d'accèsRoute Access road Asini Kasachipet OSPF1 P1 !! / transportded'énergLigne ie Transmission line

CE3 / routier Relais Truck stop P2 Lac  PMob Kapisikama Hydrographie / Hydrography

CE3 Numéro / coursd'eau de Stream number

Cours d'eau permanentCours d'eau / Permanent stream P3 Cours d'eau à écoulement diffus ou intermittent / intermittent ou àCoursdiffus écoulement d'eau P6 Intermittent ou diffused flow stream Plan d'eau / / d'eau Plan Waterbody

Mine de lithium Baie-James /James Bay Lithium Mine Réponses aux questions de l'ACEE / ACEE Requests

Carte / Map R-AD-ACEE-35-38-4 Infrastructure de gestion de l'eau en phase d'exploitation (Année 10) / Water management structure during operation phase (Year 10)

UTM, fuseau 18, NAD83 VersMatagami /

To Matagami Dessin : A. Masson ? Approbation : C. Martineau 191-01753-00_cR-AD-ACEE_35-38-4_wspT268_exp_yr10_191218.mxd

? Vers Radisson / Limite de propriété / Property limit To Radisson

Route dela Baie-James Composantes du projet / Project Component CE1

JamesBay road Halde à stériles revégétalisée / Revegetated waste rock stockpile Infrastructures revégétalisées /  Revegetated infrastructure Écoulement vers le réseau hydrographique existant / Outflow into the existing hydrographic network Brèche dans la digue et écoulement vers le milieu naturel / Dike breach and outflow into the existing hydrographic network

Fosse remplie d'eau / Pit filled with water CE2 Infrastructures / Infrastructure

Route principale / Main road

450 kV (4003-4004) Route d'accès / Access road

!! Ligne de transport d'énergie / Transmission line

Relais routier /  Truck stop

Hydrographie / Hydrography

CE3 Numéro de cours d'eau / Stream number CE6 Cours d'eau permanent / Permanent stream Cours d'eau à écoulement diffus ou intermittent / Intermittent ou diffused flow stream

Plan d'eau / Waterbody

CE4

Lac Asini Kasachipet CE3

Lac Kapisikama

Mine de lithium Baie-James /James Bay Lithium Mine Réponses aux questions de l'ACEE / ACEE Requests

Carte / Map R-AD-ACEE-35-38-5 Aménagement du site minier après la restauration / Mine Site After Rehabilitation

Sources : Orthoimage : Galaxy, août / august 2017 Relais routier Données du projet / Project data : Galaxy, 2018 Truck stop Fosse, carrière et entreposage des explosifs / km 381 Pit, quarry and explosives magasine : Mining Plus, 2018 Secteur administratif et industriel et aire de minerai / CE5 Administrative and industrial sector and ROM pad : Primero, 2018

0 185 370 m

UTM, fuseau 18, NAD83

Vers Matagami / Dessin : A. Masson Approbation : C. Martineau

? To Matagami 191-01753-00_cR-AD-ACEE_35-38-5_wspT269_rehabil_191213.mxd

CEAA-36 SURFACE WATER AND GROUNDWATER—EFFLUENT TREATMENT SYSTEMS DURING THE CONSTRUCTION AND OPERATING PHASES

A) The proponent must describe the treatment systems for all construction phase effluents and their capacity to treat the different types of contaminants in the water. In particular, the proponent must describe what happens to runoff from construction activities. AD-A-36: Measures to control runoff and possible spills will be implemented throughout the construction phase to avoid the suspended solids in watercourses (sediment barriers, erosion control mats) as well as contamination of watercourses in the event of an accidental oil spill during works (use of absorbent and recovery material). All of these measures were presented in the EIS (Table 7-5 in Chapter 7, QUA codes). Contrary to what is written in the question, there will be no effluent during the construction phase. All of the water will be collected in large-capacity retention basins. In addition, the outlet of the basins will be equipped with a sediment curtain and an oil rod to contain any accidental spillage. For more details, the previous answer (AD-A-35) shows the evolution of water management according to the different phases of the project. Since the network of ditches and basins will be built first, they can be used to manage runoff water. Diversion ditches will also be constructed to ensure that runoff on the mine site does not come in contact with runoff outside the site

CEAA-37 SURFACE WATER AND GROUNDWATER—INFORMATION CONCERNING THE SEALING MEASURES AT THE BOTTOM OF THE PILES AND CONTACT WATER DITCHES

The proponent must provide a map of the location of the sanitary effluent. The proponent may also provide the various scenarios considered for the location of that effluent if the location is unknown at this time.. AD-A-37:

There are no other scenarios for the location of the sanitary effluent. The shortest possible pipeline route will be prioritized and the pipeline will be buried within the project footprint. It will link the domestic water treatment system to CE-03. It is important to mention again that detailed engineering is not completed and, for economic reasons, it will not be completed until the authorizations (government and corporate) are obtained for the construction of the project. Map R-AD-ACEE-37 illustrates the location of the sanitary effluent in CE-03.

? Vers Radisson / Limite de propriété / Property limit To Radisson

Route dela Baie-James Composantes du projet / Project Component CE1

JamesBay road Route / Road

Effluent minier / Mine effluent  Effluent sanitaire / Sanitary effluent Station de pompage / Pumping station

Usine de traitement de l'eau / Water treatment plant Secteur administratif et industriel / Administrative and industrial sector

CE2 Fosse / Pit

Halde à minerai / ROM pad

Halde à stériles / 450 kV (4003-4004) Waste rock stockpile Halde à matière organique / Organic matter stockpile Halde à dépôts meubles / Unconsolidated deposit stockpile Entrepôt à explosifs / Explosives magazine P2 P1 Cour d'entreposage / Dry storage area CE6 Carrière / Quarry

P7 Digue et berme / Dike and berm

Bassin de rétention d'eau / Water retention basin P3 Câble de fibre optique / Optical fiber cable P4 Infrastructures / Infrastructure

P5 CE4 Route principale / Main road OSPF2 Route d'accès / Access road

!! Ligne de transport d'énergie / Transmission line

Lac Relais routier / Truck stop Asini Kasachipet OSPF1 P1  Hydrographie / Hydrography

CE3 Numéro de cours d'eau / Stream number P2 Lac Kapisikama CE3 Cours d'eau permanent / Permanent stream Cours d'eau à écoulement diffus ou intermittent / Intermittent or diffused flow stream

P3 Plan d'eau / Waterbody P6

Mine de lithium Baie-James /James Bay Lithium Mine Réponses aux questions de l'ACÉE / ACEE Requests

Carte / Map R-AD-ACEE-37 Tracé de la conduite de l'effluent sanitaire / Sanitary Effluent Line

Sources : Orthoimage : Galaxy, août / august 2017 Données du projet / Project data : Galaxy, 2018 Fosse, carrière et entreposage des explosifs / Relais routier Pit, quarry and explosives magasine : Mining Plus, 2018 Truck stop Secteur administratif et industriel et aire de minerai / km 381 Administrative and industrial sector and ROM pad : Primero, 2018 CE5 0 185 370 m

UTM, fuseau 18, NAD83

Dessin : A. Masson

Vers Matagami / Approbation : C. Martineau ? To Matagami 191-01753-00_cR-AD-ACEE_37_wspT261_eff_sani_191212.mxd

CEAA-39 SURFACE WATER AND GROUNDWATER—DESCRIPTION OF THE FLOW OF MINE WATER NORTH OF THE WASTE ROCK PILE AND THE MAIN SEDIMENTATION POND

A) The proponent must provide a description of the flow (direction of flow, route and end point) of the sedimentation pond water in the operating phase.

C) The proponent must provide a map showing the complete flow of water in the industrial zone, including the pump for the sedimentation pond for that area, the connection (pipe) between that sedimentation pond and the rainwater and runoff system, and the actual trajectory of the water between that pump and the main sedimentation pond. AD-A-39: A) All contact water (runoff from the mining site) will be pumped or drained through ditches towards the main retention pond. Clean water, not in contact with mining infrastructure, will be collected in ditches and diverted towards the vegetation at a minimum distance of 30 m. Maps R-AD-ACEE-35-1 to 35-5 indicate the direction of flow and outfall of the waters collected throughout the site. Waters collected in the main retention pond will be discharged directly into CE-02 through a ditch that will allow water to flow from the pond to the location of the planned effluent. B) Map R-AD-ACEE-41 indicates the water flow direction and management throughout the site, including the industrial area. In the administrative and industrial sector, runoff water (except runoff transiting on the ROM pad) will be collected in the small settling pond and will serve as make-up water in the concentrator circuit. The surplus accumulated in the pond, if any, will naturally flow into the ditch along the pond and the water will be directed towards the P2 pump. P2 will pump water towards the main retention pond. Contact water from the ROM pad will be directly pumped by P7 towards the main retention pond.

CEAA-41 SURFACE WATER AND GROUNDWATER—MINE WATER

The proponent must provide details of the complete path of the mine water, including the trajectory and infrastructure (pipe) between the pit and the water retention pond. AD-A-41:

Dewatering waters will be directed to the main retention pond (see Appendix R-10 in the previous answer document). A mobile pump with a water pipe will be used. The flow scheme of the water from the pit is specified on Map R-AD-ACEE-41.

? Vers Radisson / Limite de propriété / Property limit To Radisson Composantes / duprojet Project Component

Ro ut e d e l a Ba i e - J a me s CE1 Fossé d'eau de contact / Contact water ditch

J a me s Ba y r o a d Ponceau / Culvert

Secteur de pompage P1 / P1 pumping sector  Secteur de pompage P2 / P2 pumping sector

Secteur de pompage P3 / P3 pumping sector

Secteur de pompage P4 / P4 pumping sector Site de contrôle et de mesurede et contrôle/de Site Control and measurement point Secteur de pompage P5 / P5 pumping sector

CE2 Secteur de pompage P6 / P6 pumping sector

Courd'entreposage / Secteur de pompage P7 /P7 pumping sector Site réservé Site pourl’installation Dry storage area Secteur de pompage industriel et administratif / d’u nusine etraitementde 450 kV (4003-4004) Industrial and administrative pumping sector de l’eaude né (si cessaire) / minerai/Haldeà Water treatment plant ROM pad Secteur de pompage OSPF1 / OSPF1 pumping sector reserved site (if necessary) et Secteuradministratif industriel / industriel Administrative Secteur de pompage OSPF2 / and industrial sector

? OSPF2 pumping sector

P2 !

! Bassin de sédimentation /

! Settling pond !

CE6 P1 Route / Road P7 Station de pompage / Pumping station

Halde à stérile / stérile Haldeà Digue et berme / Dike and berm Waste rock stockpile P3 / Infrastructures Infrastructure P4 Halde àHalde Route principale / Main road dépôtsmeubles / CE4 Unconsolidated P5 Route d'accès / Access road deposit stockpile !! Ligne de transport d'énergie / Transmission line OPSF2 Relais routier /  Truck stop Lac organiquematière Haldeà / Asini Kasachipet Organic matter stockpile Hydrographie / Hydrography

OPSF1 CE3 Numéro de cours d'eau / Stream number CE3 Lac Cours d'eau permanent / Permanent stream Kapisikama Cours d'eau à écoulement diffus ou intermittent / PMob Intermittent or diffused flow stream Fosse / Fosse/ Pit Plan d'eau / Waterbody

Entrepôt à explosifs /explosifs Entrepôtà / Carrière Explosives magazine Quarry

Mine de lithium Baie-James /James Bay Lithium Mine Réponses aux questions de l'ACEE / ACEE Requests

Carte / / Carte MapR-AD-ACEE-41 Cheminementd'exhaure completl'eau /de Complete Path of the Mine Water

Relais routier Sources : Orthoimage : Galaxy, août / august 2017 Truck stop Données du projet / Project data : Galaxy, 2018 km 381 Fosse, carrière et entreposage des explosifs / CE5 Pit, quarry and explosives magasine : Mining Plus, 2018 Secteur administratif et industriel et aire de minerai / Administrative and industrial sector and ROM pad : Primero, 2018 0 185 370 m Pompe mobile / Mobil pump UTM, fuseau 18, NAD83 Direction de l'eau / Water direction Vers Matagami / Dessin : A. Masson

Pompage de l'eau d'exhaure / Approbation : C. Martineau Mine water pumping ? To Matagami 191-01753-00_cR-AD-ACEE_41_wspT262_pmob_191218.mxd

CEAA-42 SURFACE WATER AND GROUNDWATER—INFORMATION CONCERNING THE SEALING MEASURES AT THE BOTTOM OF THE PILES AND CONTACT WATER DITCHES

The proponent must provide information concerning the sealing measures at the bottom of the ore pile, including the presence of a geomembrane. AD-A-42: Leaching tests are currently underway. Complete results are therefore not yet available. However, depending on the results, the ore stockpile may or may not be sealed over its entire surface. In both cases, it will be designed to direct the runoff towards P7. This pump will then send the collected water directly to the main retention basin via a pipe (Maps R-AD-ACEE-35-38-1 to R-AD-ACEE-35-38-5).

CEAA-44 SURFACE WATER AND GROUNDWATER—SERVICE ROADS

A) The proponent must provide information about the means to ensure the sealing of the ditches along the service roads, since leaching of metals is expected from the construction equipment coming from the quarry or the waste rock. AD-A-44:

The waste rock will not be used for road construction. Kinetic testing is underway to confirm the potential of leaching and acid generation from the diabase unit, which is being considered to be used as underlying material for the roads. Trials are currently in its 16th week of testing over a 25-week period. Results and interpretation will be reported once the entire trial period is completed. However, it is already possible to conclude that the diabase has no potential for acid generation. In addition, to date, the trial shows that there is no significant impact anticipated with respect to metal leaching from the diabase unit.

CEAA-50 SOILS AND SEDIMENTS—CONSTRUCTION MATERIALS AND MAPPING OF LITHOLOGY TYPES

A) The proponent must provide a map showing the lithology types related to the construction materials (quarries and borrow pits). The proponent may also provide a map showing the various options considered for the choice of quarries and borrow pits to be operated.

B) The proponent must provide a description of all the environmental water quality changes caused by the use of the borrow pits and quarries.

C) The proponent must provide all results of geochemical characterization and/or any other relevant characterization of the materials that will be extracted from the quarries and borrow pits in order to determine their acid drainage and/or leaching potential.

AD-A-50: A) The borrow pits and quarries that will be used for site construction are presented and discussed at AD-A-12 B) The borrow pits and quarries that will be used for site construction are presented and discussed at AD-A-12. C) Kinetic testing is underway to confirm the potential of leaching and acid generation from the diabase unit, which is being considered to be used as underlying material for the roads. Trials are currently in its 16th week of testing over a 25-week period. Results and interpretation will be reported once the entire trial period is completed. However, it is already possible to conclude that the diabase has no potential for acid generation. In addition, to date, the trial shows that there is no significant impact anticipated with respect to metal leaching from the diabase unit. Finally, sands and gravel are inert materials and do not require leaching testing.

CEAA-52 SOILS AND SEDIMENTS—GEOCHEMICAL CHARACTERIZATION OF OVERBURDEN AND ORE

A) The proponent must provide the results of the CTEU-9 leaching tests required by the COMEX for the overburden. AD-A-52: The only rules applicable to overburden in the Metal Mining and Diamond Mining Effluent Regulations are found in the section on modifications of Schedule 2. Therefore, areas without mining activity or where mining material are not present, have been interpreted by Galaxy as being excluded from the mining site. To eliminate a controlled effluent, the design of the overburden stockpile was designed without mining equipment (no waste rock) and with an independent drainage pattern, thus creating an off-site area. Thus, the overburden would not be subject to leaching tests, although these tests were carried out.

TCLP and SPLP leaching tests have already been carried out on overburden (WSP. 2018a. James Bay lithium mine, Specialized study on geochemistry. Report prepared for Galaxy Lithium (Canada) Inc. 27 p. And ann. ) and provide an indication of the overburden leaching, which is said to be very conservative due to the aggressive nature of these tests. There is therefore no requirement to conduct less aggressive CTEU-9 tests than TCLP and SPLP. There will be no CTEU-9 tests conducted on the overburden.

WSP JAMES BAY LITHIUM MINE PROJECT NO. 191-01753-00 ANSWERS TO PRECISION REQUEST ON ANSWER TO QUESTIONS (1ST SERIES) RECEIVED FROM THE CANADIAN PAGE 40 ENVIRONMENTAL ASSESSMENT AGENCY AS PART OF THE ENVIRONMENTAL REVIEW OF THE PROJECT GALAXY LITHIUM (CANADA) INC. – DECEMBER 2019

CEAA-60 and AIR AND GREENHOUSE GASES—ADJUSTMENT OF ATMOSPHERIC MODELLING OF CEAA-104 A) CONTAMINANTS / TOXICOLOGICAL RISK ASSESSMENT—BASELINE DATA AND IDENTIFICATION OF CONTAMINANTS OF POTENTIAL CONCERN

A) The proponent must include emissions from generators (including their number and location), the concrete batch plant and the transportation of concentrate between the mine and Matagami in its modelling of the atmospheric dispersion of contaminants. The proponent may make these estimates on the basis of the maximum emissions from these types of equipment, infrastructure and transportation or on the basis of the worst-case scenario.

B) On the basis of the emissions estimated in A), the proponent must estimate the contribution of those components to total atmospheric emissions.

AD-A-60 and 104 A):

Emissions from generators and the concrete plant will be added to the construction scenario. In regards to modelling the transport of concentrate between the mine site and Matagami, it will be conducted on a typical stretch of a few kilometres rather than on the entire route of 385 km. The results obtained will be transposable to the entire route. Modelling of the entire route is not retained for the following reasons:

— The validity of the AERMOD model: The AERMOD model consists of a steady-state Gaussian dispersion model. This type of model considers, for example, that the meteorological parameters are constant over the model time-step across the domain. This type of model is therefore valid for near-field applications and is therefore not valid for this type of modelling (see Section 2.1, Suitability of Models in Appendix W of the US EPA). The use of another model would therefore be required. — The size of the domain requires a technically arduous modelling. For example, the number of receptors required for modelling on a domain of nearly 400 km in length by a few kilometres wide would be very high, making modelling difficult to perform by typical calculators (calculation time and size of the output files). The modelling report will be forwarded when the modelling will be completed.

CEAA-78 AVIAN FAUNA—RESULTS OF AVIAN FAUNA INVENTORIES

D) The proponent must prove that the avian fauna inventories were adapted for each migratory species at risk present and potentially present in the study area, and that the inventory methodology (habitat types inventoried, period, number of stations according to the habitat availability area, etc.) was adapted to each of these species. To do so, the proponent may provide the protocol used for each species. The proponent must also prove that their potential habitats were covered sufficiently by the inventories to allow production of a representative picture of the study area. AD-A-78: D) In response to questions 29 and 30 from the CEAA answered at the concordance stage, habitats of avian species at risk or of concern potentially present in the study area were described and mapped (answer R-30 and Maps CEAA 30-1 to CEAA 30-5). Table AD-A-78 provides, as a reminder, the known habitat characteristics of these species.

Bird inventory stations were already located on maps R-78-1 and R-78-2 of the previous document answering the questions of the CEAA. To show that the distribution of these inventory stations was adequate to detect the potential presence of at-risk migratory species in the study area, the position of these stations was reported on maps showing the potential habitat for each of the five targeted species (maps R-AD-ACEE-78-1 to R-AD-ACEE-78-5). It should be noted that on these maps, only inventory stations within the study area are shown because the potential habitats of the five targeted species have been mapped only for these stations. The inventories were conducted during the nesting period of these species. The methodologies used are specified in Section 6.3.5.2 of the EIS from which the information listed below is derived. Regarding nighthawks, a nocturnal inventory was conducted on a clear night on July 6, 2017 to take advantage of the periods of increased activity of these species around the full moon. This inventory included 10 listening stations, spread along the James Bay Highway (see corresponding attached maps and Map 6-20 of the EIS for stations outside the study area). These stations were inventoried according to the protocol developed by the Regroupement QuébecOiseaux (2015). The inventory began at least 30 minutes after sunset, as soon as the moon was visible, and ended no later than moonset. Each listening point consisted of two consecutive three-minute periods. Should short-eared owl would have been present, this species would also have been detected during this evening. These two species could also have been detected opportunistically as part of the inventory of breeding passerine (see below) or other inventory activities carried out as part of this project. Breeding passerines, including Rusty blackbird, Olive-sided flycatcher and Bank swallow were inventoried using the listening station method (Blondel et al., 1970; Environment Canada, 1997 and 2007). To this end, about 60 stations were distributed in the habitats located in the local study area (see corresponding attached maps) and visited once between July 5 and 10, 2017 inclusively. Given the relative homogeneity of the environment, the stations were divided into three habitat categories: wetlands (31 stations), open environments (18 stations) and softwood stands (9 stations). An inventory at each listening station have also been conducted at an earlier preliminary stage of the project from June 30 to July 4, 2012. Listening stations were visited early in the morning, between 5:15 a.m. and 10:30 a.m., in rain-free and light or no-wind conditions. At each visit, a 5-minute listening period was allocated at each station. During this period, each bird or group of birds detected was identified and its distance from the observer was estimated, i.e. 0 to 50 m and more than 50 m. Flying bird observations or observations made from more than 50 m were used to improve the list of species but not to estimate abundance and density.

Maps R-AD-ACEE-78-1 to R-AD-ACEE-78-5 presented in this document show that the potential habitats of these species are widely distributed in the study area and that the inventory stations established have provided sufficient coverage of these habitats.

WSP JAMES BAY LITHIUM MINE PROJECT NO. 191-01753-00 ANSWERS TO PRECISION REQUEST ON ANSWER TO QUESTIONS (1ST SERIES) RECEIVED FROM THE CANADIAN PAGE 42 ENVIRONMENTAL ASSESSMENT AGENCY AS PART OF THE ENVIRONMENTAL REVIEW OF THE PROJECT GALAXY LITHIUM (CANADA) INC. – DECEMBER 2019

Table AD-A-78 Potential Habitats of Species at Risk or of Special Concern Present or Potentially Present in the Study Area and Surface Areas Directly Impacted by the Project

SPECIES HABITAT CHARACTERISTICS Short-eared owl A wide variery of unforested habitats are used by the short-eared owl, including arctic tundra, grasslands, peatlands, marshes, fallow pastures, and occasionally fields planted with row-crops. Preferred nesting sites are dense grasslands and toundra with areas of sand-sage. Although short- eared owls clearly prefer open habitats, it is thought that the primary factor influencing local habitat choice (in summer and winter) is food abundance. Rusty blackbird The breeding habitat of the rusty blackbird corresponds closely to the boreal forest. Within this biome, its habitat is characterized by forest wetlands, such as slow-moving streams, peatlands, sedge meadows, marshes, swamps, beaver ponds and pasture edges. In woodlands, the blackbird rarely ventures into the forest itself. In winter, it occurs primarily in damp woodlands and cultivated fields. Common nighthawk The breeding habitat of the common nighthawk is varied and includes open habitats where the ground is devoid of vegetation, such as sand dunes, beaches, logged areas, burned-over areas, forest clearings, rocky outcrops, rock barrens, prairies, peatlands and pastures. It also occurs in conifer forests with or without deciduous trees. From the start of European settlement, the common nighthawk probably took advantage of newly opened habitats created by massive deforestation in eastern Canada and United States. The apparition of gravel roofs contributed to the expansion of its habitat across North America. Olive-sided flycatcher Olive-sided flycatcher is most often associated with open areas containing tall trees or snags for perching. The species sallies for prey (flies out to catch prey, insects, and returns to perch). Open areas may be forest openings, forest edges near natural openings (such as rivers or swamps) or human-made openings (such as logged areas), burned forest or open to semi-open mature forest stands. There is evidence that birds nesting in harvested habitats experience significantly lower breeding success than those nesting in natural openings. Generally, forest habitat is either coniferous or mixed coniferous. In the boreal forest, suitable habitat is more likely to occur in or near wetland areas. It would seem that although the amount of old-growth forest has obviously decreased over the past century or more, the amount of habitat attractive to olive-sided flycatcher could be remaining more or less constant since forest harvest continues to create openings favoured by the birds. Recent studies indicate that these areas are less conducive to breeding. Bank swallow The bank swallow breeds in a wide variety of natural and artificial sites with vertical banks, including riverbanks, lake and ocean bluffs, aggregate pits, road cuts, and stock piles of soil. Sand- silt substrates are preferred for excavating nest burrows. Breeding sites tend to be somewhat ephemeral due to the dynamic nature of bank erosion. Breeding sites are often situated near open terrestrial habitat used for aerial foraging (e.g., grasslands, meadows, pastures, and agricultural cropland). Large wetlands are used as communal nocturnal roost sites during post-breeding, migration, and wintering periods.

! 355 000 ? 360 000

Zone d'étude locale / Local study area Vers Radisson / ! Habitat potentiel du hibou des marais / To Radisson Potential habitat of short-eared owl

" ENG-12 ! Inventaire / Inventory ENG-11

" ! Station d'inventaire nocturne des engoulevents / " ENG-08 ENG-10 Nighthawk listening station

! " Station d'écoute des oiseaux chanteurs /  O-33

Songbird listening station !

Infrastructures / Infrastructure ! Route principale / Main road

CE1 ! Route d'accès / Access road

!! Ligne de transport d'énergie / Transmission line !

5 792 500 5 792 500 5 Relais routier /

 Truck stop ! Hydrographie / Hydrography

! ENG-09 " CE3 Numéro de cours d'eau / Stream number

Cours d'eau permanent / ! Permanent stream Cours d'eau à écoulement diffus ou intermittent /

! Intermittent or diffused flow stream

! Peuplements terrestres / Terrestrial Vegetation

! Affleurement rocheux / Rock outcrop CE2 O-05

O-01 ! Arbustaie / Scrubland O-09 O-03 Lac Asiyan

! Aulnaie crispé / Alder forest O-11 Akwakwatipusich

! Dénudé sec / O-13 Dry barren land O-06 O-04 O-02 ENG-08

" ! Brûlis / Burnt area

O-10 ! Végétation terrestre dans l'emprise / O-12 O-31

O-14 Terrestrial vegetation in right-of-way O-29 ! O-27 O-25 Peuplements humides / Wetland

! O-21 O-32 Plan d'eau / Waterbody

O-19 O-30 ! CE6 O-17 O-28 Tourbière arbustive / Shrubby peatland

ENG-07 ! O-22 Tourbière boisée / Treed peatland

O-20 " 450 kV (4003-4004) O-18 ! Tourbière ouverte / Open bog

! Végétation humide dans l'emprise / ! Wetland in right-of-way CE3

! CE4

O-39 O-37 O-35 O-33 !

5 790 000 5 Lac 790 000 5 Asini ! Kasachipet O-42 O-40 Lac

O-34 ! Kapisikama O-36

ENG-06 !

O-43 " !

! Mine de lithium Baie-James /James Bay Lithium Mine

O-44 O-46 O-50 ! Réponses aux questions de l'ACEE / ACEE Requests

O-48 O-52 ! Carte / Map R-AD-ACEE-78-1

O-47 O-49 !

O-51 O-53 Habitat potentiel du hibou des marais et sites! d'inventaire / Potential Habitat of Short-Eared Owl and Survey Sites

O-64 ! O-62 O-60 O-58

O-56 O-54 Sources : ! ENG-05 Orthoimage: Galaxy, août 2017

" Inventaire / Inventory: WSP 2017 ! O-63 O-61 O-59 Relais routier /

O-57 O-55  Truck stop ! km 381

CE5 O-69 ! O-68 O-70

0 240 480 m !

O-71

UTM, fuseau 18, NAD83 ! !

Dessin : A. Masson Route de la Baie-James / ! Approbation : R. Duhamel James Bay road !

Vers Matagami / 191-01753-00_cR-AD-ACEE_78-1_wspT254_hibou_191216.mxd

355 000 ? To Matagami 360 000

! !

! 355 000 ? 360 000

Zone d'étude locale / Local study area Vers Radisson / ! To Radisson Habitat potentiel pour le quiscale rouilleux /

Potential habitat of rusty balckbird !

Inventaire / Inventory ! Station d'écoute des oiseaux chanteurs / O-33 Songbird listening station  ! Infrastructures / Infrastructure ! Route principale / Main road

! Route d'accès / Access road !! Ligne de transport d'énergie / Transmission line

CE1 ! Relais routier /

 Truck stop !

5 792 500 5 792 500 5 Hydrographie / Hydrography Numéro de cours d'eau /

! CE3 Stream number

Cours d'eau permanent / Permanent stream ! Cours d'eau à écoulement diffus ou intermittent /

Intermittent or diffused flow stream !

Plan d'eau / Waterbody ! Peuplements humides / Wetland !

! Tourbière arbustive / Shrubby peatland CE2 O-05

O-01 ! Tourbière boisée / Treed peatland O-09 O-03 Lac Asiyan

! Tourbière ouverte / Open bog

O-11 Akwakwatipusich ! Végétation humide dans l'emprise / O-13

O-06 O-04 O-02 Wetland in right-of-way ! O-10

O-12 ! O-31

O-14 O-29 ! O-27

O-25 ! O-21 O-32

O-19 O-30 ! CE6 O-17 O-28

O-22 !

O-20 450 kV (4003-4004)

O-18 !

! ! CE3

! CE4

O-39 O-37 O-35 O-33 !

5 790 000 5 Lac 790 000 5 Asini ! Kasachipet O-42 O-40

Lac O-34 ! O-36

Kapisikama !

O-43 !

! Mine de lithium Baie-James /James Bay Lithium Mine

O-44 O-46 O-50 ! Réponses aux questions de l'ACEE / ACEE Requests

O-48 O-52 ! Carte / Map R-AD-ACEE-78-2

O-47 O-49 !

O-51 O-53 Habitat potentiel du quiscale rouilleux et sites! d'inventaire / Potential Habitat of Rusty Blackbird and Survey Sites

O-64 ! O-62 O-60 O-58

O-56 O-54 Sources : ! Orthoimage: Galaxy, août 2017

Inventaire / Inventory: WSP 2017 ! O-63 O-61 O-59 Relais routier /

O-57 O-55  Truck stop ! km 381

CE5 O-69 ! O-68 O-70

0 240 480 m !

O-71

UTM, fuseau 18, NAD83 ! !

Dessin : A. Masson Route de la Baie-James / ! Approbation : R. Duhamel James Bay road !

Vers Matagami / 191-01753-00_cR-AD-ACEE_78-2_wspT255_quiscale_191216.mxd

355 000 ? To Matagami 360 000

! !

! 355 000 ? 360 000

Zone d'étude locale / Local study area Vers Radisson / ! To Radisson Habitat de nidification pour l'engoulevent d'Amérique /

" ENG-12 ! Nesting habitat of Common Nighthawk ENG-11 Habitat d'alimentation pour l'engoulevent d'Amérique /

" ! Feeding habitat of Common Nighthawk ENG-10 ! " Inventaire / Inventory 

! Station d'inventaire nocturne des engoulevents / " ENG-08 Nighthawk listening station

! Station d'écoute des oiseaux chanteurs / O-33 Songbird listening station

CE1 ! Infrastructures / Infrastructure

! Route principale /

5 792 500 5 792 500 5 Main road

Route d'accès / Access road ! !! Ligne de transport d'énergie / Transmission line

! ENG-09 Relais routier / Truck stop " 

! Hydrographie / Hydrography

CE3 Numéro de cours d'eau / Stream number ! Cours d'eau permanent / Permanent stream

! Cours d'eau à écoulement diffus ou intermittent / ! Intermittent or diffused flow stream

CE2 O-05

O-01 ! O-09 O-03 Peuplements terrestres / Terrestrial Vegetation Lac Asiyan

! Affleurement rocheux / O-11 Akwakwatipusich Rock outcrop

O-13 ! Arbustaie / Scrubland

O-06 O-04 O-02 ENG-08 " ! Dénudé sec / O-10 Dry barren land

O-12 ! Pessière noire à lichen / O-31 Black spruce lichen forest

O-14 O-29 ! O-27 Brûlis /

O-25 Burnt area ! O-21 O-32 O-19 Peuplements humides / Wetland

CE6 O-30 ! O-17 O-28

Tourbière arbustive / ! Shrubby peatland O-22 ENG-07

O-20 " 450 kV (4003-4004)

O-18 ! Tourbière ouverte / Open bog

! ! CE3

! CE4

O-39 O-37 O-35 O-33 !

5 790 000 5 Lac 790 000 5 Asini ! Kasachipet O-42 O-40 Lac

O-34 ! Kapisikama O-36

ENG-06 !

O-43 " !

! Mine de lithium Baie-James /James Bay Lithium Mine

O-44 O-46 O-50 ! Réponses aux questions de l'ACEE / ACEE Requests

O-48 O-52 ! Carte / Map R-AD-ACEE-78-3

O-47 O-49 !

O-51 O-53 Habitat potentiel de l'engoulevent d'Amérique et sites! d'inventaire / Potential Habitat of Common Nighthawk and Survey Sites

O-64 ! O-62 O-60 O-58

O-56 O-54 Sources : ! ENG-05 Orthoimage: Galaxy, août 2017

" Inventaire / Inventory: WSP 2017 ! O-63 O-61 O-59 Relais routier /

O-57 O-55  Truck stop ! km 381

CE5 O-69 ! O-68 O-70

0 240 480 m !

O-71

UTM, fuseau 18, NAD83 ! !

Dessin : A. Masson Route de la Baie-James / ! Approbation : R. Duhamel James Bay road !

Vers Matagami / 191-01753-00_cR-AD-ACEE_78-3_wspT256_engoul_191216.mxd

355 000 ? To Matagami 360 000

! !

! 355 000 ? 360 000

Zone d'étude locale / Local study area Vers Radisson / ! To Radisson Habitat potentiel du Moucherolle à côtés olive /

Potential Habitat of Olive-sided flycatcher !

Inventaire / Inventory ! Station d'écoute des oiseaux chanteurs / O-33

Songbird listening station !

 Infrastructures / Infrastructure

! Route principale / Main road

! Route d'accès / Access road !! Ligne de transport d'énergie / Transmission line

CE1 ! Relais routier /

 Truck stop !

5 792 500 5 792 500 5 Hydrographie / Hydrography

Numéro de cours d'eau / ! CE3 Stream number Cours d'eau permanent / Permanent stream

! Cours d'eau à écoulement diffus ou intermittent /

Intermittent or diffused flow stream ! Peuplements terrestres / Terrestrial Vegetation

Boisé / Woodland !

Pessière noire à lichen / Black spruce lichen forest ! Pessière noire à aulnes / Black spruce alder forest CE2 O-05

O-01 ! O-09 O-03 Pinède grise /

Lac Asiyan Jack pine forest ! O-11 Akwakwatipusich Brûlis / Burnt area

O-13 ! O-06 O-04 O-02 Peuplements humides / Wetland ! O-10 Plan d'eau / Waterbody

O-12 ! O-31 Tourbière arbustive /

O-14 Shrubby peatland O-29 ! O-27

O-25 Tourbière boisée / Treed peatland ! O-21 O-32

O-19 Tourbière ouverte / Open bog O-30 ! CE6 O-17 O-28 Végétation humide dans l'emprise /

O-22 ! Wetland in right-of-way

O-20 450 kV (4003-4004)

O-18 !

! ! CE3

! CE4

O-39 O-37 O-35 O-33 !

5 790 000 5 Lac 790 000 5 Asini ! Kasachipet O-42 O-40

Lac O-34 !

Kapisikama O-36 !

O-43 !

! Mine de lithium Baie-James /James Bay Lithium Mine

O-44 O-46 O-50 ! Réponses aux questions de l'ACEE / ACEE Requests

O-48 O-52 ! Carte / Map R-AD-ACEE-78-4

O-47 O-49 !

O-51 O-53 Habitat potentiel du Moucherolle à côtés olive et sites! d'inventaire/ Potential Habitat of Olive-Sided Flycatcher and Survey Sites

O-64 ! O-62 O-60 O-58

O-56 O-54 Sources : ! Orthoimage: Galaxy, août 2017

Inventaire / Inventory: WSP 2017 ! O-63 O-61 O-59 Relais routier /

O-57 O-55  Truck stop ! km 381

CE5 O-69 ! O-68 O-70

0 240 480 m !

O-71

UTM, fuseau 18, NAD83 ! !

Dessin : A. Masson Route de la Baie-James / ! Approbation : R. Duhamel James Bay road !

Vers Matagami / 191-01753-00_cR-AD-ACEE_78-4_wspT257_mouche_191216.mxd

355 000 ? To Matagami 360 000

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! ! ?

Zone d'étude locale / Local study area !

O-52 Vers Radisson / !

A To Radisson ! Habitat de nification de l'hirondelle de rivage /

! Nesting habitat of Bank swallow !

Habitat d'alimentation de l'hirondelle de rivage / !

! Feeding habitat of Bank swallow ! Inventaire / Inventory O-53 

O-33 Station d'écoute des oiseaux chanteurs / !  Songbird listening station

! Infrastructures / Infrastructure

Route principale / Main road CE1 ! O-56 O-54

Route d'accès / Access road ! !! Ligne de transport d'énergie / Transmission line

Route de la Baie-James / ! Relais routier / Truck stop

James-Bay road Relais routier /   ! O-55 Truck stop Hydrographie / Hydrography km 381 ! Cours d'eau permanent / Permanent stream

Numéro de cours d'eau / ! CE3 Stream number

Cours d'eau à écoulement diffus ou intermittent / !

Intermittent or diffused flow stream ! Plan d'eau / Waterbody CE2 O-05

O-01 ! O-09 O-03 Lac Asiyan O-11 ! Akwakwatipusich Peuplements terrestres / Terrestrial Vegetation

O-13 ! Anthropique / Anthropogenic

O-06 O-04 O-02 ! O-10 Route de la Baie-James / O-12 ! O-31

O-14 O-29 ! O-27 James Bay road

O-25 ! O-21 O-32

O-19 O-30 ! CE6 O-17 O-28

O-22 !

O-20 450 kV (4003-4004)

O-18 !

! ! CE3

! CE4

O-39 O-37 O-35 O-33 !

Lac Asini ! Kasachipet O-42 O-40 Lac

O-34 !

Kapisikama O-36 !

O-43 !

! Mine de lithium Baie-James /James Bay Lithium Mine

O-44 O-46 O-50 ! Réponses aux questions de l'ACEE / ACEE Requests O-48 O-52 A

! Carte / Map R-AD-ACEE-78-5 Habitat! potentiel de l'hirondelle de rivage O-47 O-49 O-51 O-53 et sites d'inventaire / Potential Habitat of

Bank Swallow! and Survey Sites

O-64 ! O-62 O-60 O-58

O-56 O-54 ! Sources :

Orthoimage: Galaxy, août 2017 ! O-63 O-61 O-59 Relais routier / Inventaire / Inventory: WSP 2017

O-57 O-55  Truck stop ! km 381

CE5 O-69 ! O-68 O-70

0 240 480 m !

O-71

UTM, fuseau 18, NAD83 ! !

Dessin : A. Masson

Approbation : R. Duhamel !

Vers Matagami / 191-01753-00_cR-AD-ACEE_78-5_wspT258_hirondelle_191216.mxd

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CEAA-83 SPECIES AT RISK—CUMULATIVE EFFECTS ASSESSMENT and CEAA-90 A) The proponent must assess the cumulative impacts for each species at risk that could frequent the study area, including the caribou (boreal population), the wolverine and other non-avian species at risk, such as Chiroptera (bats).

B) The proponent must assess the environmental impacts for the species assessed by the Committee on the Status of Endangered Wildlife in Canada (COSEWIC) that are not yet listed in Schedule 1 of the Species at Risk Act and that could frequent the study area, including the caribou, eastern migratory population.

C) Not having assessed the cumulative impacts for species at risk for which there are recovery strategies, the proponent has not described the consequences of those impacts for the population and distribution objectives identified in those strategies, as requested. The proponent must provide that information. AD-A-83 and 90: A) With regard to bats, the evaluation of cumulative impacts is the subject of a complete section of the impact study (Section 8.6.1).

As explained in response to questions CEAA-88 and CEAA-89 of the response document provided to the CEAA questions, the project will have no effect on wolverines or caribou. At the project level, the cumulative effect is therefore considered to be zero for these species.

As mentioned in Section 6.3.2.3 of the impact study, the populations of micromammals had already suffered from forest fires during the 2011 inventory. A good diversity of species was still present in favorable habitats, but the densities of micromammals observed were already low. Between 2011 and 2017, the number of species recorded went from eight to two, with a capture success approximately five times lower, despite it already being very low in 2011. Mature forest environments have virtually disappeared from the study area, including around wetlands, which are environments that constitute a key element of the habitat of several species of micromammals. These species include the Rock Vole and the Cooper Vole-Lemming (Desrosiers et al., 2002; Duhamel and Tremblay, 2013; MFFP, 2001a). Under these conditions, the current presence of these two species in the study area is considered unlikely. Consequently, the cumulative effect at project scale and at the regional scale is considered to be zero for these species.

As for the pygmy weasel, as mentioned in Section 6.3.2.2 of the impact study, a project to identify weasel carcasses trapped by Crees was carried out by the regional office of Nord-du-Québec of the Ministry of Natural Resources and Wildlife (MRNF) between 2009 and 2011. During this period, a total of 1,021 weasels were sent to the Chibougamau Wildlife Development office. Of these, 671 were analyzed and a single specimen, captured near Eastmain, was found to be a pygmy weasel (CRRNTBJ, 2010). Trapping data for UGAF 92 has not mentioned weasels of any species since 2012, which includes Eastmain and the study area (MFFP, 2019). If we consider that its prey consists almost exclusively of mice and voles (MFFP, 2001b; Prescott and Richard, 2004) and taking into account the results obtained within the framework of inventories of micromammals, the current presence of the pygmy weasel in the study area is unlikely. Therefore, the cumulative effect at the project scale and regional scale are considered to be zero for this species.

B) The assessment of cumulative impacts on avian species at risk, including the Hudson barge, is detailed in the answer to question CEAA-90 A) of the response document to previous CEAA questions. It is estimated that the cumulative effects will be negligible and will consist mainly of an increase in disturbance near the site, as well as occasional loss and modification of their habitats. The environmental effects of the project on migratory caribou are considered to be zero, as specified in the response to question CEAA-89 from the previous questions from CEAA. As a result, the cumulative effect is also considered to be zero for the caribou of the eastern migrant population. In this context, as mentioned in response to question CEAA 90 B) the project will have no impact, in terms of cumulative effects, on the objectives of the recovery strategy for boreal caribou (ECCC, 2019), specifically the maintenance of the size of the local populations of Nottaway or Témiscamie and Assinica herds, nor on the availability of habitat. The same goes for the objectives of the recovery program for wolverines, which are, in the short term, confirmation of the presence of the species in Quebec and Labrador and, in the long term, the natural establishment of self-sustaining populations of wolverines and minimizing interactions with trapping activities targeting other species (EC, 2016). In the absence of impact, cumulative or not, on the wolverine, the project will have no consequence on these objectives.

Eastern migratory caribou are not the subject of a recovery program at this time. In any case, in the event of the identification of population and distribution objectives for this wildlife component, the project should have no impact on these given that it is not likely to have negative effects on the eastern migratory caribou population from the Leaf River.

CEAA-88 D) SPECIES AT RISK—CARIBOU MONITORING PROGRAM and CEAA-91 A) The proponent must provide the general outline (e.g., objectives, follow-up frequency and methodology) of a caribou monitoring program. AD-A-88 and 91:

As noted in the answer to the questions CEAA-28 and CEAA-30 provided at the conformity stage, the study area provides poor habitat conditions for caribou due to its high rate of disturbance and that the species has made very little use of the study area over the past decade. Therefore, its actual probability of being present in the study area is considered non-significant in the short and medium terms. The information collected from indigenous communities, in response to the CEAA-31 provided at the conformity stage, confirms the low presence potential of caribou in the study area. Indeed, users of the RE2 trapline have reported that migratory caribous are becoming less abundant throughout the territory and they have not been observed in 2018-2019. It appears that since forest fires burned the area, migratory caribous are no longer present (see answer to question CEAA-31 in the previous document). As for the forest caribou, it is sometimes observed south of the RE2 trapline (west of the James Bay Highway), and this area would constitute, according to one user, the northern limit of the species range (answer to question CEAA-31 in the previous document). A recent consultation with the users of the territory of the Eastmain community was conducted in December 2019 to update traditional knowledge on caribou. During the consultation, the tallymen questioned (VC33 and VC35) confirmed that there had never been large numbers of caribou in the area, even before the repeated disturbances by forest fires.

WSP JAMES BAY LITHIUM MINE PROJECT NO. 191-01753-00 ANSWERS TO PRECISION REQUEST ON ANSWER TO QUESTIONS (1ST SERIES) RECEIVED FROM THE CANADIAN PAGE 56 ENVIRONMENTAL ASSESSMENT AGENCY AS PART OF THE ENVIRONMENTAL REVIEW OF THE PROJECT GALAXY LITHIUM (CANADA) INC. – DECEMBER 2019

However, in the unlikely event that caribou venture into the study area, employees will be informed of the importance of reporting all sightings. If necessary, these observations will be compiled in a register. Furthermore, as soon as the authorizations will be received and although, during various consultation activities, the traditional knowledge on caribou were not frequently mentioned (WSP, 2019a: answer to the question CEAA-31), the proponent commits to creating a joint working table (Galaxy, Eastmain and Waskaganish) where the monitoring to be conducted on this species will be discussed (answer to the question CEAA-100 in the previous document).

CEAA-96 INDIGENOUS PEOPLES—CONSULTATIONS WITH INDIGENOUS COMMUNITIES

B) The proponent must incorporate a portion of the north shore of Eastmain River into the human environment study area.

C) Following the inclusion of a portion of the north shore of Eastmain River in the human environment study area, the proponent must identify and locate the camps and other traditional activities of VC33 and VC35 tallymen on Map 6-22 of the EIS. AD-A-96: B) and C) Information on the north shore portion of the Eastmain River is found on maps R-AD-ACEE-96-1 and R-AD-ACEE-96-2. The camps and traditional activities in the VC33 and VC35 registered trapline areas are also presented. The information received from VC33 and VC35 tallymen are also detailed below. VC33 The VC33 trapline, located on the right bank of the Eastmain River and north of the RE2 trapline is frequented by several users. Although the northern section of the VC33 trapline is more widely used (such as Lac Elmer, Lac Duxbury and the Opinaca River), the Eastmain River and some nearby areas remain used for various activities.

The Eastmain River is particularly used by VC33 users in the winter, when the ice cover is well established. It can then be used to access their trapline from the community. When the river is free of ice, it can be navigated in areas, but the VC33 trapline can no longer be accessed by boat from the community since the Hydro-Québec diversion. The river remains generally more difficult to navigate because ofteh low water level. The Eastmain River is valued by the VC33 trapline users and their families since many activities may be performed there, including the transmission of traditional knowledge to younger generations. Users harvest from the river and feed on pike, trout, beavers and moose. However, it was mentioned that the river is now rarely used because of the low water level and the fact that the river is muddy and not good for fishing anymore because of Hydro-Québec’s facilities. Users have indicated different areas between PK 96 and PK 116 along the Eastmain River where they can hunt geese and moose and also fish. Upstream, an area on the right bank of the river (toward PK 118) has been identified for harvesting blueberries. When resources are present, trapping activities for other furred game may be performed.

Near the Rupert River, the Rapin Brook, which flows into the river near the Eastmain River Bridge, is used for different activities. Four family camps have been built between this brook and the road that runs east of the James Bay Road (road to the former Opinaca Aerodrome). These camps are located 5 km northeast of the Eastmain River. In 2018, users of the trapline were planning to build a new camp there. Furthermore, a community camp located on the banks of the Eastmain River, at PK 98, is frequented by members of the community and by users of the trapline, for moose hunting activities in the fall, goose hunting in the spring, or for trapping. In winter, once ice cover is well established, users can travel there by following the river. When free of ice, the camp is accessible by boat from an access from the James Bay Road. A second community camp is located on the right bank of the Eastmain River at PK 38, located 62 km downstream from the study area. It is used for moose hunting in the fall, waterfowl hunting in the spring and for fishing. The users can travel there by helicopter in the spring or by seaplane in the fall. In 2018, the VC33 users mentioned that they had less harvests and visits to their trapline since 2013 as a result of forest fires that destroyed a significant portion that year. However, they planned to resume all their activities on their trapline once the resources are restored. VC35 The VC35 trapline, located east of the RE2 trapline, was affected by the creation of the Opinaca Reservoir in 1980 and more recently by construction work related to the Eastmain-Sarcelle-Rupert Complex. Users of the VC35 trapline primarily visit the western portion of this reservoir since access is more difficult in the eastern portion. The main frequented areas are therefore located in the family camp areas, northwest of the trapline and bordered by the Eastmain River to the southwest. Users particularly visit this river from the Opinaca dam (OA-11), up to sill 5, at PK 136. Downstream from this point, navigation is very difficult from the Eastmain River diversion and the area is rather frequented in the winter. Is was also mentioned that Hydro-Québec installed a weir to mediate the issue but that fish and wildlife never really returned. The VC35 land users that frequent the southwest area of the reservoir and the Eastmain River use the James Bay Road followed by the road to the old Opinaca Aerodrome, near which is located their family camp. This camp area included 5 campsites in 2018 and can be used throughout the year. Therefore, moose hunting, fishing, trapping and goose hunting activities take place in the Eastmain River between the dam and PK 136. Furthermore, users of the VC35 trapline also fish in the Eastmain River Bridge area. Walleye, whitefish and pike are caught on the Eastmain River.

WSP JAMES BAY LITHIUM MINE PROJECT NO. 191-01753-00 ANSWERS TO PRECISION REQUEST ON ANSWER TO QUESTIONS (1ST SERIES) RECEIVED FROM THE CANADIAN PAGE 58 ENVIRONMENTAL ASSESSMENT AGENCY AS PART OF THE ENVIRONMENTAL REVIEW OF THE PROJECT GALAXY LITHIUM (CANADA) INC. – DECEMBER 2019

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77°0' !

! ! Projet mine de lithium Baie-James / 

Vers / To ! James Bay lithium mine Project

Rapin ! !

Radisson ! ! Infrastructures / Infrastructure

! ! Ruisseau ! Route principale / Main road !

! Route d'accès / Access road !

! ! !! Ligne de transport d'énergie / Transmission line

! ! ! Relais routier /  ! Truck stop

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! Tour de télécommunication / Telecommunication tower ! ! (! ! Rapides ! Lieu d'enfouissement en territoire isolé (LETI) /

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VC33 Mantuwataw ! ( Remote landfill ! !

! Rampe de mise à l'eau / Boat ramp

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Limites! / Limits ! !

! ! ! Terre de catégorie II / Category II land

! ! 735 kV (7063)

! Rivière Eastmain ! 735 kV (7062) Terrain de trappage / RE2 ! Trapline !

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Seuil / ! ! Weir 5 ! !

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Lac Asiyan ! !

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Truck stop !

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Route deJames la Baie-James Bay road / ! !

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Rivière ! ! ! !

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 ! Réponses aux questions de l'ACEE / ACEE Requests ! !

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Carte / Map R-AD-ACEE-96-1 ! ! ! ! !

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Lac Nistam Lot de piégeage / Trapline !

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Siyachistawach! ! !

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! ! Sources :

! Canvec, 1 : 50 000, RNCan, 2015 !

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BDGA, 1 : 1 000 000, RNCan, 2011 ! ! RE1

! Terres de catégorie / Category land : Carto-Média, 2001 !

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Lac !

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69 kV (614) Matawaw !

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450 kV (4003-4004) ! !

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UTM, fuseau 18, NAD83 !

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Matagami !

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? 77°0' (! Projet mine de lithium Baie-James / Vers / "  To Rapin James Bay lithium mine Project Radisson Infrastructures / Infrastructure (! (! Ruisseau Route principale / Main road Route d'accès / Access road !! Ligne de transport d'énergie / Transmission line  Relais routier / Truck stop   Tour de télécommunication / (! Telecommunication tower Rapides Lieu d'enfouissement en territoire isolé (LETI) / VC33 Mantuwataw (! Remote landfill Rampe de mise à l'eau / Boat ramp

! (! Utilisation du territoire par les Cris / Cree Land Use (!  (! Campement permanent cri / Cree permanent camp "  735 kV (7063) (! Campement temporaire cri / Cree temporary camp Rivière Eastmain (!  (! 735 kV (7062) Source d'eau potable /  (! Drinking water source (! Aire de chasse, de trappage ou de pêche / Hunting, trapping or fishing area Lac (! (! (! (! Aire de cueillette / Berry picking (! Mantuwataw VC35  (! Sentier de motoneige / Snowmobile trail (!  (! (! Parcours de navigation / (! Navigation route Portage / Portage Seuil / (! Weir 5 Aire valorisée / RE2 Valued area Lac Asiyan Baux de villégiature / Recreational Lease " Akwakwatipusich " Fins de villégiature / (! Recreational use Fins d'abri sommaire en forêt / " Rough forest shelter  Archéologie / Archaeology Site archéologique / (! Archaeological site Zone de potentiel archéologique /  (! (! Archaeological potential area  Relais routier / Truck stop Limites / Limits Km 381 Zone d'étude du milieu humain / Social environment study area (! (! (! Zone d'étude du potentiel archéologique / Archaeological potential study area

Terre de catégorie II / Category II land

Rivière RE2 Terrain de trappage / Trapline Miskimatao (! (! ! Lac ( Causabiscau

Mine de lithium Baie-James / James Bay Lithium Mine (!  Réponses aux questions de l'ACEE / ACEE Requests (! Carte / Map R-AD-ACEE-96-2 Lac Nistam Composantes du milieu humain / Siyachistawach Social Environment Components 

Sources : Canvec, 1 : 50 000, RNCan, 2015 RE1 BDGA, 1 : 1 000 000, RNCan, 2011 (! Terres de catégorie / Category land : Carto-Média, 2001 (! Lac Archéologie / Archaeology, Arkéos, 2017 (! Apikwaywasich Lac Amiskw Inventaire / Inventory : WSP, 2018 69 kV (614) Matawaw Cartographié par / mapping by : WSP

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Froide

CEAA-99 INDIGENOUS ISSUES—LAND AND RESOURCE USE (BLACK BEAR)

B) The proponent must propose mitigation measures related to the modification of black bear behaviour. AD-A-99: The only planned mitigation measures are the isolation of the residual materials depot and the restriction of its access. These are set out in R-99 of the previous response document. The administrative area of the mine site itself will be monitored and access will be restricted and controlled. Employees will be made aware that black bears may be attracted to the facility and the presence of food sources. Anyone venturing near the facilities will be noted in the wildlife observation register and measures of scaring off the bears will be planned. Thus, if a bear successfully enters the mine site, employees will be called upon to enter the buildings and scaring measures will be implemented to scare it away. If the individual bear does not respond appropriately, a tallyman will be called to scare or kill the bear.

CEAA-100 INDIGENOUS ISSUES—LAND AND RESOURCE USE (CARIBOU)

B) The proponent must document Cree knowledge regarding the fragmentation of the woodland and migratory caribou habitat in the area with relation to recent land development.

C) The proponent must propose mitigation measures, defined jointly with the Cree communities of Eastmain and Waskaganish, to decrease the project’s potential impacts on the woodland and migratory caribou harvest for current future land users. AD-A-100: B) Based on discussions with local trapline holders, both woodland and migratory Caribou herds are not common in this area. There have been unique sightings over the last 15 years, but the area lends itself more to moose habitat/hunting. Due to the low frequency of sightings, no significant comments were able to be gathered in terms of habitat fragmentation in the area with relation to recent land development. C) Mitigation measures will be considered in the future if woodland or migratory caribou herd become a frequent occurrence. Consultation will continue with impacted tallymen on this topic.

CEAA-102 INDIGENOUS ISSUES—LAND AND RESOURCE USE

A) The proponent must present the RE2 tallyman’s concerns and recommendations regarding the mine rehabilitation plan to encourage the resumption of traditional activities by future generations on the mining territory. AD-A-102: A) The rehabilitation plan was discussed with RE2 tallyman and his family. A video showing the mine and close activities was also presented. They expressed an interested in seeing the pit backfilled with the waste rock pile. That recommendation is under consideration.

CEAA-104 TOXICOLOGICAL RISK ASSESSMENT—BASELINE DATA AND IDENTIFICATION OF CONTAMINANTS OF POTENTIAL CONCERN

B) The proponent must consider the water discharges and anticipate the substances that could be in the effluent(s), runoff and filtration water, including mercury. The proponent must identify the substances of potential concern based on the ore composition and the kinetic tests. AD-A-104: The geochemical study presented in Appendix AD-A-31 shows that no criteria exceedances are expected. Discharges therefore do not present toxicological risks for flora and fauna. In addition, the chemical parameters of these discharges will be monitored (including mercury) and if criteria are exceeded, treatment will be implemented. The treatment put in place will depend on the parameters for which concentrations exceed the criteria.

CEAA-106 TOXICOLOGICAL RISK ASSESSMENT—CONTAMINANT MONITORING

The proponent must provide the general outline (e.g., objectives, monitoring frequency, methodology, contaminants to be monitored, standards and criteria to be applied to protect human health, and types of sampling) of an environmental monitoring and follow-up program for relevant contaminants in the various media (e.g., drinking water, air, soil and traditional food) based on human health protection criteria. This monitoring would, in particular, confirm the hypotheses and findings in the toxicological risk assessment. AD-A-106:

MONITORING FOR SOILS: The soils were characterized and an assessment of the background content for the metals conducted before the start of the project. Soil quality monitoring is not planned during the exploitation phase, especially since the toxicological study carried out by Sanexen (Sanexen, 2018 - study presented in Appendix CEAA-44 of the concordance) shows that no additional metal concentration is expected in the soil or in the sediment. As required by the Guidelines for Preparing Mine Closure Plans in Quebec, the preparation of an environmental characterization study and certification by an expert referred to in Section 31.65 of the EQA will be carried out at the end of the project. In the event that the characterization study reveals the presence of contaminants in concentrations in the field exceeding the regulatory limits values in force during the restoration, the following steps would be implemented:

— Filing of a rehabilitation and dismantling plan for the facilities, for approval by the MELCC; — Environmental rehabilitation works for soils and groundwater in accordance with the rehabilitation plan approved by the MELCC; — Drafting of an environmental monitoring report attesting to the conformity of the works to the rehabilitation plan approved by the MELCC and certification of the report by an expert referred to in article 31.65 of the EQA; — Dismantling of facilities including off-site management of materials and final reprofiling of the land.

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GROUNDWATER MONITORING: Groundwater quality was characterized before the start of the project and an assessment of the background conditions carried out. The groundwater quality on the site will be monitored during the work in accordance with the requirements of D019 as well as articles 4 and following the Land Protection and Rehabilitation Regulation. The groundwater monitoring program presenting the details of the planned monitoring (list of parameters, sampling point, etc.) is described in Section 10.4.2 of the EIS. For wells used for drinking water supply, continuous monitoring will be carried out according to the Regulation respecting the quality of drinking water. The criteria of this regulation corresponds for most parameters to the recommendations for the quality of drinking water in Canada. In addition, Galaxy is committed to ensuring that no qualitative or quantitative impact is observed for the well of the truck stop. If an impact is observed, corrective measures will be put in place to ensure an adequate supply of drinking water to the truck stop. These measures could include drilling a new well, on-site water treatment, or even a temporary supply of transported water.

FOLLOW-UP FOR TRADITIONAL FOOD: Information regarding follow-up for traditional food is presented in response AD-A-109.

CEAA-108 TRADITIONAL FOOD—BASELINE DATA

The proponent must perform a chemical analysis of other resources harvested by the First Nations as traditional food in collaboration with them. This collaboration could help identify any species that should be monitored.

This analysis is very important, as the First Nations have expressed concern about the potential contamination of traditional food. It would help ensure that the First Nations people do not avoid the area on the presumption that the project’s activities may contaminate traditional food, which is a very important source of nutrients. Compliance with environmental regulations (e.g., water and air regulations) in itself may not be enough to provide an acceptable measure of health protection. AD-A-108: The reference metal concentration levels for various types of traditional food are presented in AD-A-109.

CEAA-109 TRADITIONAL FOOD—QUALITY MONITORING

The proponent must provide the general outline (e.g., objectives, follow-up frequency, methodology, contaminants to be monitored, species to be sampled, standards and criteria to be applied to protect human health, and types of sampling) of a human health protection program for monitoring the quality of traditional food in collaboration with Cree land users. If the proponent decides to implement the monitoring program only for plant species, it must provide a rationale for that decision. Monitoring of traditional food would ensure better communications with the First Nations regarding the risks (or lack thereof).

AD-A-109: To predict toxicological risks to human health related to project activities, modeling was carried out by Sanexen (2018; appendix ACÉE 44 of the concordance stage) to determine the background levels of metals in mammals (the woodland caribou, beaver, hare, lynx, marten, moose, black bear and porcupine) and birds (geese, black duck, ptarmigan, snow goose, teal winter grouse and Canadian grouse) consumed by the Cree population. To establish the baseline levels, studies on the concentration of metals in the leaves, fruits and roots of plants (blueberries, Labrador tea, Kalmia with narrow leaves, Alders, Tamarack) have been carried out (Specialized study on the flora, WSP 2018). The risk analysis based on these models and the baseline levels in plants has shown that the toxicological risks to human health are negligible. In September 2019, fishing was carried out in CE-02 (stream where the effluent from the main retention basin will discharge) to analyze mercury concentrations brook trout (the only species caught). Additional measurements will be taken, before construction work, on beaver, goose and fish, in collaboration with the Indigenous groups to collect samples from the catches. The metal contents will also be measured from these samples. Galaxy will conduct the necessary follow-ups during the operation phase if problems concerning the releases are observed or in response to concerns raised by the surrounding communities. Monitoring programs will be developed according to the problems at that time, which are unknown to date, since the current data does not suggest that contamination of traditional food will be problematic.

CEAA-110 HUMAN ENVIRONMENT—DRINKING WATER QUALITY

A) The proponent must specify the mitigation measures included in the contingency plan to mitigate the impacts of potential spills/accidents on sources of drinking water in the study area. AD-A-110:

All preventative measures as well as the Emergency Management Plan control measures intended to significantly reduce accidental spills and their effects, if they were to occur, are well detailed in R-110 of the previous response document. The water quality of the drinking water wells on the site will be rigorously controlled.

In the event of an impact, corrective measures would be put in place to ensure an adequate supply of drinking water on the site as well as at the truck stop. These measures could include drilling a new well, on-site water treatment, or even providing a temporary supply of transported water.

CEAA-116 INDIGENOUS ISSUES—INEQUITY OF IMPACTS

G) The proponent must assess the project’s positive and negative effects on the various subgroups of the Eastmain and Waskaganish Cree communities, including women, youth and seniors, and propose appropriate mitigation measures for the assessment and for these subgroups. AD-A-116:

STUDY AREA

The study area used to assess the positive and negative impacts of the project on various subgroups of the population of the Eastmain and Waskaganish Cree communities corresponds to the territorial boundaries of each of these communities. These boundaries are shown on Map R-AD-ACEE-116.

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CURRENT CONDITIONS

In order to illustrate the issues potentially faced by subgroups such as women, young people and elderly people from the Eastmain and Waskaganish Cree communities related to the nearby mining development, the following section highlights some socio-economic characteristics of the communities concerned and of the Cree communities as a whole.

— Like many Aboriginal communities in Quebec, the Eastmain and Waskaganish Cree communities are characterized by the high proportion of their population under 30 years of age, which was 60.1% and 56.9% respectively in 2016, compared to 33.8% in Quebec as a whole (Statistics Canada, 2017). The situation facing young people with regards to education, training and employment is therefore at the heart of several issues in Cree communities. — Health region (HR) 18, or the James Bay Cree territory, has the highest dropout rate in Quebec. In 2009-2010, this rate was 90.1% (95.4% for boys and 85.2% for girls) compared to 17.5% in Quebec as a whole (CBHSSJB, 2013). — The number of people aged 15 and over who are not married or in a common law union is higher in the communities concerned (57.4% in Eastmain and 52.5% in Waskaganish) than in the province as a whole (43.7%) (Statistics Canada, 2017). — Compared to all Quebec families, the number of single-parent families is higher in Eastmain and Waskaganish, with 41.5% and 34.3% respectively compared to 16.8% for Quebec. It should also be noted that the number of single-parent families with three or more children is almost four times higher in Waskaganish (35.1%) and nearly twice as high in Eastmain (17.5%) than in Quebec as a whole (9.2%). In both Cree communities concerned, the median income of single- parent families is lower than that of couple families with children ($56,064 less in Eastmain and $40,277 less in Waskaganish) (Statistics Canada, 2017). — In both Cree communities, the employment rate of women (70.0% in Eastmain and 53.5% in Waskaganish) is proportionately higher than the employment rate of men (63.0% in Eastmain and 44.1% in Waskaganish); the difference is lower in Quebec as a whole (62.5% for men versus 60.2% for women) (Statistics Canada, 2017). — The birth rate in Cree communities is double the Quebec average (INSPQ, 2014). — Birth rates among teenage mothers and women with less than 11 years of education are 4 to 5 times higher in HR 18 than in Quebec as a whole (CBHSSJB, 2013). The statistics on sexually transmitted and blood-borne infections (STBBIs) in Eeyou Istchee are recent and incomplete, preventing us from fully understanding the situation; according to 2011 statistics from the Ministère de la Santé et des Services sociaux (MSSS), the chlamydia and gonococcal infection rates in the Cree region of James Bay were seven and eleven times higher respectively than the Quebec average, indicating a high transmission rate within the population (INSPQ, 2014).

CONSTRUCTION PHASE Sources of Impact — Site preparation and infrastructure construction: Stripping of natural soils, clearing, excavation and grading work, work in aquatic environment. Presence of site trailers and construction of temporary or permanent infrastructure (buildings, storage areas, access roads, mining infrastructure foundations, construction of buildings and of road for ore transport, etc.). — Economic development and presence of workers: Hiring of labour and presence of workers at the mine, purchase of goods and materials and granting of contracts for various services. Mitigation Measures In its environmental impact study (EIS) study, Galaxy committed to adopting a series of mitigation measures that can improve the positive impacts and mitigate the negative impacts of the project during the construction phase on sub-groups of the Cree communities of Eastmain and Waskaganish, such as women, young people and elderly people. Table 1 presents the relevant measures for this purpose. Modifications made and precisions added to Table 1 from the original version of the EIS are underlined.

Table AD-A-116-1 Mitigation Measures Proposed as part of the Environmental Impact Study

Use of land for traditional purposes

UTT 01 Ensure workers are aware of traditional practices of Indigenous communities and activities of Indigenous users of the territory.

UTT 02 Establish and maintain a communication plan to inform the public, users, and municipal authorities about the start and progress of work.

UTT 03 Conduct beaver dam inspections at regular intervals to identify any changes to the CE2 water level and flow, and notify the community of these changes.

UTT 04 Prohibit hunting and recreational fishing for workers at the mine site.

Infrastructure

CIR 01 Establish a traffic management plan, including the addition of road signs (e.g. speed limit, snowmobile crossings, etc.).

CIR 02 Secure the installations representing a risk to the land users.

CIR 03 Maintain at all times public routes free of any obstruction of debris, waste, dirt, sediment, etc.

CIR 04 Establish, together with the Tallyman, an area closed to traditional activities for security purposes.

Perception of physical environment

PER 01 Make monitoring and environment quality monitoring reports available annually.

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Table AD-A-116-1 Mitigation Measures Proposed as part of the Environmental Impact Study (continued)

Quality of life

VIE 01 Establish an ongoing dialogue with the public through a community relations group and communication program.

VIE 02 Establish and implement Galaxy Lithium’s code of ethics.

VIE 03 Prohibit alcohol and drug consumption in the worker camp/site.

VIE 06 Prohibit all forms of video lottery/gambling on site.

Local and regional economy

ELR 01 Establish a regional purchasing policy that would prioritize local and regional companies in the competitive bidding process where the skill and price are competitive.

ELR 02 Offer training programs to fill mine positions with local workers where possible.

ELR 03 Prioritize hiring local workers.

ELR 04 Develop a memorandum of understanding and partnership agreement for Indigenous participation in the project (IBA).

ELR 05 Implement mechanisms to integrate workers, particularly for members of Indigenous communities (information sessions, human resources representatives, employee assistance program, etc.).

ELR 06 There will be a communications committee and HR department that will communicate to local stakeholders, and high schools with respect to positions available at the mine.

In addition, in its responses to questions from the CEAA and the MELCC as part of the environmental assessment process, Galaxy clarified some of the mitigation measures it announced in the EIS, or has committed to implementing other measures to mitigate the impacts of its project. Some of these measures can also improve the positive impact or mitigate the negative impact of the project on women, young people and elderly people. The latter are shown in Table AD-A-116-2.

Table AD-A-116-2 Mitigation Measures Proposed as part of Responses to the Questions from the CEAA and MELCC

Use of land for traditional purposes

CEAA-101 Encourage activities, such as stopping production and doing care and maintenance for roughly 10 days, that limit wildlife disturbance and road traffic during goose hunting season, as well as facilitating the practice of traditional activities for Cree workers.

CEAA-112a During the first years of monitoring, the VC33 and VC35 tallymen willy be consulted regarding the current use of their lands and resources for traditional purposes.

CEAA-112b Addition of the following elements to the monitoring program on the current use of lands and resources for traditional purposes: attendance at camps and their peacefulness, the effectiveness of the traffic management plan and access to camps during hunting periods.

Table AD-A-116-2 Mitigation Measures Proposed as part of Responses to the Questions from the CEAA and MELCC (continued)

Quality of life

CEAA-116a No tolerance for sexual harassment, or any form of harassment or discrimination, for any/all Galaxy employee.

CEAA-116b Per the rules and regulations of the KM 381 Truck stop, there will be no tolerance for prostitution; the truck stop will request police intervention if a case is reported.

CEAA-116c Record of cases involving calls to police on Galaxy employees and subcontractors’ files by Galaxy’s human resources department

CEAA-138 Inclusion of terms and conditions regarding hours and benefits of Cree workers in the Impact and Benefit Agreement (IBA) with the community of Eastmain.

QC-159 Addition of specific activities to the project’s social impact monitoring program to monitor more targeted issues, such as alcohol and drug use, enrichment management or any other issues that arise during the project. These activities may include bi-annual interviews with community stakeholders, during which issues could be documented and recommendations on how to respond to them could be collected. As far as possible, Galaxy will implement solutions to alleviate the social and/or health problems brought to its attention. If the company cannot respond, the reasons will be explained to the monitoring committee.

Local and regional economy

CEAA-92 Galaxy will submit to the MELCC a detailed program for monitoring the impacts on the human environment, which will include monitoring the impact on training, employment and the economy of regional communities.

CEAA-93 Galaxy will encourage training and employment for young people by presenting in schools in the region, in collaboration with the schools and the relevant school boards, and by informing students of all the opportunities available with a diploma as well as mining sector jobs. To do this, posters presenting job opportunities at the Galaxy mine will be hung in schools and public buildings. Career days will be organized in schools with different types of mine workers. Guided tours of the mine will also be offered to local students.

Maintaining good relations between Galaxy and local Cree communities

CEAA-96 Hiring of a Cree Community Liaison Officer during all project phases who will communicate the which potential jobs and contracts will be offered by the company. The liaison officer will also ensure Cree workers are successfully integrated with other mine site workers, share the concerns of the Cree population with the company, including territory users, and help resolve conflicts.

CEAA-97a Formation of a monitoring committee, with invitations being offered to representatives of the communities of Eastmain and Waskaganish, Waswanipi, the Eeyou Istchee James Bay government and RE1, RE2, RE3, VC33, VC35 and R08 tallymen.

CEAA-97b A system for receiving and processing complaints will be set up by Galaxy before construction begins, and will continue until closure. A report on the nature of complaints received by Galaxy, and the way they were dealt with, will be presented to the members of the monitoring committee at each meeting.

CEAA-112c Environmental monitoring reports will be published on the Galaxy website and presented to respective trapline holders if requested,

To reduce or compensate for potential negative impacts specifically on women, young people or elderly people, Galaxy also wishes to adopt the specific measures presented in Table AD-A-116-3. Finally, as part of the Eastmain community IBA, Galaxy has completed a capacity study to assess the skills and knowledge of the community’s population, in order to maximize employment opportunities and economic benefits in the community.

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Table AD-A-116-3 Specific Measures

Use of land for traditional purposes

UTT 05 Provide a fund in the IBA with the community of Eastmain to finance intergenerational traditional knowledge initiatives.

Quality of life

VIE 07 In collaboration with the Community liaison officer and the CBHSSJB, implementation by the human resources department of a social issue awareness program for workers, including sexual harassment, prostitution, alcohol and drug use, gambling, financial management, violence and any other issue that may arise during mine operation.

VIE 08 Offer suitable working conditions for pregnant women by complying with the Commission de la santé et de la sécurité du travail’s (CNESST) “For a Safe Maternity Experience” program.

VIE 10 Provide STBBI testing services to workers and their families, in collaboration with the CBHSSJB.

VIE 11 Ensure that telephone and/or Internet services are available at the camp to encourage workers to contact their families.

VIE 12 Authorize family visits for workers staying on the mining site.

VIE 13 Have zero tolerance for violence at the workers camp/and on site, with disciplinary measures imposed if found guilty of harassment or violence..

VIE 14 Reserve a section of the workers’ camp for women to protect their privacy.

VIE 15 Have at least one woman present at the camp on Galaxy’s human resources team to facilitate discussions with Cree and non-Cree workers.

Maintaining good relations between Galaxy and local Cree communities

REL 01 Avoid wasting food and materials at the mine and give the excess to local Cree communities.

Description of Impact During the construction period, the project could have positive and negative impacts on nearby Cree community populations, specifically certain subgroups such as women, young people and elderly people. Women Galaxy is committed to implementing several measures to promote employment, including women, at the Cree mine (ELR 01, ELR 02, ELR 03, ELR 04, ELR 04, ELR 06, CEAA-92, CEAA-93, CEAA-96 and VIE 08). Add to these measures the capacity study that Galaxy has undertaken to conduct as part of the IBA with the community of Eastmain, which will promote employment, especially of women. As presented in the Existing Conditions section, the employment rate of women in the Cree communities of Eastmain and Waskaganish is higher than that of men. At first glance, employment offered during mine construction does not appear to positively impact women. However, construction phase jobs are generally well paid and, in some cases, pay better than community jobs. The construction phase can therefore be beneficial in terms of the potential for increasing the income of women in these communities, as well as in other James Bay Cree communities. Furthermore, since some of these jobs are traditionally occupied by men, employment for women could be a valuable opportunity for Cree women to develop skills in alternative fields.

However, in a study prepared in collaboration with the Cree Board of Health and Social Services of James Bay, the INSPQ mentions that mining project work schedules (during construction as well as operation) create health and social impacts on families, women and children, especially during extended stays on the project site (INSPQ, 2014). During public consultations held as part of the EIS, some participants also expressed concern about the effects that the work schedules of Cree workers could have on families. Concerns were shared about the potential increase in children separated from their families or elderly people left to fend for themselves in the absence of their family members. It should also be noted that the number of single-parent families, the heads of which tend to be predominantly women, is greater within the Cree communities. Work-life balance may therefore be a challenge for women employed at the mine as well as the wives of mine workers during the construction phase of the mine. The INSPQ also mentions that the high birth rate in Cree communities increases the chances that an employee will be pregnant or breastfeeding during her employment period. According to the institute, it is important for the developer to ensure that Cree workers receive adequate care for their condition. Galaxy intends to ensure that all Cree workers are satisfied with their living conditions in the camp as well as their quality of life in general. The company has also provided several measures for this purpose, the following of which will mitigate the impact of the project on work-family balance for Cree workers as well as for women in Cree communities: CEAA-138, QC-159, VIE 08, VIE 11, VIE 12 and REL 01. During public consultations conducted as part of the EIS, elderly people who took part in a focus group raised the issue of sexual harassment that Cree workers could experience. As detailed in measure CEAA-116a, Galaxy will not tolerate any form of harassment or discrimination, including sexual harassment, on its site. Other measures to establish and maintain a healthy and respectful work environment, such as VIE 02, VIE 03, ELR 05, CEAA-116b, CEAA-116c, QC-159, CEAA-96, CEAA-97a, VIE 07, VIE 11, VIE 12 and VIE 13, will also help prevent these types of issues from arising. It is also worth noting that hunting recreationally and carrying weapons will be prohibited on the mine site. The EIS already highlighted the impact the project could have on increasing drug and alcohol use (Section 7.4.4). These issues can sometimes be linked to other issues such as domestic violence, the victims of which are most often women. For its part, the INSPQ indicates that certain social and psychological problems, such as drug addiction, unemployment, discrimination and depression, can lead to bouts of violence in some people. It is also mentioned that violence is present in the James Bay Cree territory and seems to affect young adults in particular (INSPQ, 2014). To prevent cases of violence on the mine site and in Cree communities, Galaxy will take the following measures: VIE 02, VIE 03, ELR 05, CEAA-116a, CEAA-116b, CEAA-116c, QC-159, CEAA-96, CEAA-97b, VIE 07 and VIE 13. The section on current conditions reported a significantly higher incidence of STBBIs in James Bay Cree communities, as well as higher birth rates among teenage mothers and less educated women. During the consultations conducted as part of the project’s environmental assessment process, the CEAA reported concerns from the Cree community related to prostitution at the Km 381 truck stop. It can therefore be argued that the project could increase risky sexual behaviour and teenage pregnancy. Galaxy has also provided a series of measures to mitigate this impact: VIE 02, VIE 03, ELR 05, CEAA-116a, CEAA-116b, CEAA-116c, QC-159, VIE 07, VIE 10, VIE 11, VIE 12, VIE 14 and VIE 15. Galaxy is working in collaboration with the Cree Women’s Association of Eeyou Istchee to conduct focus groups with local Cree women; and subsequently develop plans to ensure site safety, communication and best practices in terms of hiring and reaching qualified female workers. The intention is to keep an office space in the community of Eastmain which will make it easier for women with children and families to fill those roles as they will have more structured/standard work week than the mine site.

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Young People The project employment and training opportunities will undoubtedly positively impact young people in the communities of Eastmain and Waskaganish. Galaxy also plans to set up specific activities to promote employment and training in mining for young people, as described in measure CEAA-93. In order to respond to the fear often expressed by socio-economic stakeholders that mining projects will incite young people to drop out of school in order to take jobs that require little to no qualifications, Galaxy will stress the importance of obtaining professional qualifications to get the most out of the available jobs. There is also the capacity study that Galaxy has undertaken to conduct as part of the IBA with the community of Eastmain, which will promote employment, especially of young people. Therefore, by helping to increase their employment rate and income, the project could benefit young people. According to the INSPQ, job creation among young people is a major challenge for development projects among the Cree population in order to ensure the sustainability of their communities. Investments in education also help boost self-esteem and slow down migration to urban areas. According to the INSPQ, the increase in individual income may encourage young people to buy hunting and fishing equipment, which may lead to more opportunities for them to participate in traditional activities (INSPQ, 2014). It should also be noted that during the focus groups held as part of the EIS, elderly and young people indicated that working at the mine could interfere with traditional activities among the Cree. This could thereby deprive young Cree workers of opportunities to be more widely exposed to traditional Cree culture. However, Galaxy intends to implement certain measures to promote the practice of traditional activities for its Cree workers, as described in the following measures: CEAA-101 and CEAA-135. Furthermore, in order to promote knowledge transfer between generations, Galaxy will provide a fund in the IBA with the community of Eastmain to finance intergenerational traditional knowledge initiatives (see UTT 05). Echoing the social problems set out in Section 7.4.4 of the EIS, the INSPQ mentions that the increased income of mine workers can lead to excessive spending or overconsumption (INSPQ, 2014). As this is often many young people’s first job, it is easy to imagine how they may be at greater risk of getting into debt. Workers will learn about financial management through the human resources department as part of the mine project, as described in measure VIE 07. Young Cree workers are also at risk of experiencing other social issues previously discussed such as alcohol and drug use and violence, for which Galaxy has provided a set of measures: VIE 02, VIE 03, ELR 05, CEAA-116c, QC-159, CEAA-96, CEAA-97b and VIE 13. Elderly People Among the population sub-groups analyzed in this question, elderly people are least likely to be positively impacted by the economic benefits of the project since they are not specifically targeted by jobs and contracts. During public consultations conducted as part of the environmental impact study, elderly people highlighted the opportunities that the project represented for young people and hoped that they will take advantage of them. Elderly people, however, could benefit more directly from investments in the community (new services or infrastructure) made by the Eastmain First Nation Council using the funds negotiated in the IBA with Galaxy.

In addition to the negative impacts already mentioned in the EIS related to the current use of lands and resources for traditional purposes, for which many measures are provided (UTT 01, UTT 02, UTT 03, UTT 04, CIR 01, CIR 02, CIR 03, CIR 04, CEAA-101, CEAA-112a, CEAA-112b, CEAA-138 and UTT 05), the negative impacts related to family tension or divided opinions could potentially affect elderly people in particular. Since the project’s benefits primarily come from employment and contracts, it is easy to see how tension could arise within the community between those who receive employment and those who do not. Furthermore, since many elderly people have lived the traditional Cree way of life since their youth and are strongly attached to traditions, the project could disrupt the territory, adding to other factors they have witnessed since the development of the James Bay territory. This disruption could cause them to disapprove of the project or distrust the project and its developer. For many elderly people, the well-being of James Bay Cree territory residents depends on more than material well-being; it depends on having access to the territory and maintaining subsistence activities (INSPQ, 2014). The mitigation measures aimed at maintaining good relations between Galaxy and the local Cree communities will provide the entire population, including elderly people, with transparent information on the mine’s activities and its impacts on the community, as well as on Galaxy’s environmentally and socially responsible actions. These measures include the following: PER 01, VIE 01, CEAA-96, CEAA-97a, CEAA-97b, CEAA-112c and REL 01. As mentioned in the section concerning the project’s impacts on women, another negative impact for elderly people could be the decrease in time that Cree people employed by the project can dedicate to caring for elderly people in their circle since the mine schedule requires them to stay on the mine site for several consecutive days. As also presented in the previous section, the following measures will directly or indirectly mitigate the project’s negative impact on work-family balance: CEAA-138, QC-159, VIE 08, VIE 11, VIE 12 and REL 01. Impact Assessment Implementing mitigation measures will minimize the negative impacts on women, young people and elderly people in the Eastmain and Waskaganish communities during construction. Usually, this impact’s intensity is considered moderate at the start of the project, when the employees of the promoter are mainly the only ones on the site. But since Galaxy will implement its mitigation measures during the first few months of the construction phase, the impact’s intensity will be low. Its extent is regional since it affects the Cree communities of Eastmain and Waskaganish. Finally, the impact’s duration is short. Overall, the significance of the impact on women, young people and elderly people in the affected communities during the construction phase is considered minor.

OPERATION PHASE Sources of Impact — Economic development and presence of workers: Hiring of workforce and presence of workers at the mine, purchasing of goods, services and materials for mining operations. — Presence and operation of the pit: Ore and waste rock drilling, blasting and extraction activities. Mitigation Measures

— The measures presented during the construction phase will continue during the operation phase.

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Description of Impact All the impacts described during the construction phase are likely to continue during the operation phase. Impact Assessment Implementing mitigation measures will minimize the negative impacts on women, young people and elderly people in the Eastmain and Waskaganish communities during operation. Overall, the impact’s intensity is considered low during operation since the developer will have had time to implement the various mitigation measures and confirm their effectiveness since the beginning of the construction phase. Its extent is regional since it affects the Cree communities of Eastmain and Waskaganish. Finally, the impact’s duration is moderate. Therefore, the significance of the impact on women, young people and elderly people in the affected communities during the operation phase is considered moderate.

250 000 325 000 400 000 475 000

Baie d'Hudson Bay  Vers / To QUÉBEC Radisson

Chisasibi Radisson Baie- TERRE-NEUVE James ET LABRADOR Wemindji Bay Wemindji  *# Eastmain   Nemaska 5 875 000 5 Waskaganish 875 000 5

Golfe Matagami Saint-Laurent / St. Lawrence Gulf

Centrale de 0 200 km la Sarcelle / Sarcelle Mine Powerhouse  Éléonore *# *# !

Baie James Bay Réservoir Opinaca *# Opinaca Reservoir Centrale de Relais routier Centrale de l'Eastmain-1 /

5 800 000 5 l'Eastmain-1-A / 800 000 5 Eastmain-1 Powerhouse *# Rivière Eastmain Truck stop *# Eastmain-1-A  Eastmain  km 381 Powerhouse  (fermé / *# closed) *#*# !! Réservoir de l'Eastmain 1 / Eastmain 1 Reservoir

s e m a J d - a e o i r a y B a

a B l

u J

o R Nemaska *#   *#

5 725 000 5 Mine 725 000 5 Whabouchi Waskaganish Route du Nord

*#

Rivière Rupert

 Relais routier Rivière Broadback Truck stop km 257

ONTARIO

QUÉBEC

Rivière Nottaway 5 650 000 5 650 000 5

Lac Evans

Vers / To Chibougamau 5 575 000 5 575 000 5

Vers / To Matagami

Lac Matagami 250 000 325 000 400 000 475 000

Projet mine de lithium Baie-James /  Limites / Limits  James Bay Lithium Mine Project  Communauté d'Eastmain / Relais routier / Eastmain community Mine de lithium Baie-James / James Bay Lithium Mine  Truck stop Réponses aux questions de l'ACEE / ACEE Requests Communauté de Waskaganish / Aéroport /  Airport Waskaganish community R-116 Terres de catégorie I / (! Mine existante / Existing mine Category I land Localisation régionale du site minier / Regional Location of the Mine Site ! Centrale hydroélectrique / Terres de catégorie II / Category II land  Hydroelectric powerhouse Sources : Canvec, 1 : 50 000, RNCan, 2015 Poste et ligne de transport d'énergie / BDGA, 1 : 1 000 000, RNCan, 2011 *# Terres de catégorie / Category land : Carto-Média, 2001 Substation and transmission line Communautéa cries / Cree community, onseil cri sur l'exploitation minière

Route principale / Main road

Route secondaire / Secondary road 0 12,5 25 km

UTM, fuseau 18, NAD83

Dessin : A. Masson Approbation : É. Charest 191-01753-00_cR-AD-ACEE_116_wspT252_communaute_191212.mxd

CEAA-124 ACCIDENT RISK MANAGEMENT—POTENTIAL IMPACTS OF A SPILL ON MIGRATORY BIRDS AND SPECIES AT RISK

The proponent must assess the potential effects of an accidental spill of hazardous materials on migratory birds and species at risk and discuss the potential consequences of a spill for these species and their habitats. AD-A-124: Preventive measures greatly reduce the risk of accidental spills of hazardous materials. Best practices will be put in place as specified in the EIS. In addition, the planned control measures ensure that any spills will be contained and cleaned up rapidly for a return to their original state. Under these conditions (low occurrence probability, proven control measures and low risk level), in the event of a spill following activities at the mine site, on the ground or in a stream, no natural habitat, not already impacted by the project, would be affected. In addition, the development of the site has been designed to ensure that the water and soil affected by the operations are contained and that no contamination is spread outside the mine site (Maps R-AD-ACEE-35-38-1 to R-AD-ACEE-35-38-5). The potential effect of an accidental spill of hazardous materials on birds and species at risk and their habitats is therefore of low intensity, limited scope and short duration. Rapid reclamation of the site of the spill eliminates any medium- to long-term consequences. The impact is therefore minor. This conservative assessment is based on the premise that birds or species at risk are present at the time of the accidental spill or between the time of the spill and the clean-up. This is unlikely because the animals are not expected to approach the mine site due to intensive human activity in the area.

CEAA-133 MONITORING AND FOLLOW-UP PROGRAMS—MONITORING PROGRAM

A) The proponent must provide the general outline of the environmental monitoring program.

B) The proponent must indicate, for the elements requiring monitoring specified in the program mentioned in A), the measures and means considered for carrying out such monitoring. AD-A-133:

Section 10.3 of the EIS deals with environmental monitoring. It includes information on the program's objectives and implementation, the roles and responsibilities of the supervisor and environmental subcontractors, and the outlines from which the final surveillance program will be developed. Since the various protection, prevention and control measures will be indicated in the quote, they will be an integral part of the contract with the contractor responsible for conducting the work. The environmental manager supported by his/her team of inspectors will be responsible for the implementation of all measures. Any breach will be reprehensible and punishable by various penalties. Permit conditions related to environmental monitoring will be incorporated into the program.

REFERENCES

— BLANGY, Sylvie et Anna DEFFNER. 2014. Impacts du développement minier sur les hommes et les caribous à Qamani’tuaq au Nunavut: approche participative. En ligne : https://www.erudit.org/fr/revues/etudinuit/2014-v38-n1-2- etudinuit01719/1028862ar.pdf. Consulté le 11 décembre 2019. — BLONDEL, J., C. FERRY et B. FROCHOT. 1970. « La méthode des indices ponctuels d’abondance (IPA) ou des relevés d’avifaune par station d’écoute ». Alauda, vol. 38. p. 55-71. — CONSEIL CRI DE LA SANTÉ ET DES SERVICES SOCIAUX DE LA BAIE JAMES (CCSSSBJ). 2013. Plan régional dans le cadre du développement nordique. Janvier 2013. En ligne : http://www.creehealth.org/library/online/plan- r%C3%A9gional-dans-le-cadre-du-d%C3%A9veloppement-nordique. Consulté le 5 décembre 2019. — ENVIRONNEMENT CANADA. 1997. Guide pour l’évaluation des impacts sur les oiseaux. Direction des évaluations environnementales et Service canadien de la faune. 53 p. — ENVIRONNEMENT CANADA. 2007. Protocoles recommandés pour la surveillance des impacts des éoliennes sur les oiseaux. Service canadien de la faune. 41 p. — COMMISSION RÉGIONALE SUR LES RESSOURCES NATURELLES ET LE TERRITOIRE DE LA BAIE-JAMES (CRRNTBJ). 2010. Portrait faunique de la Baie James C09 07. Matagami. 280 p. — DESROSIERS, N., R. MORIN et J. JUTRAS. Juin 2002. Atlas des micromammifères du Québec. Société de la faune et des parcs du Québec. Direction du développement de la faune. Québec. 92 p. — DUHAMEL, R. et J. A. TREMBLAY. 2013. Rapport sur la situation du campagnol des rochers (Microtus chrotorrhinus) au Québec, ministère du Développement durable, de l’Environnement, de la Faune et des Parcs, Direction générale de l’expertise sur la faune et ses habitats, 22 p. — ENVIRONNEMENT ET CHANGEMENT CLIMATIQUE CANADA (ECCC). 2019. Programme de rétablissement modifié du caribou des bois (Rangifer tarandus caribou), population boréale, au Canada [Proposition]. Série de Programmes de rétablissement de la Loi sur les espèces en péril, Environnement et Changement climatique Canada, Ottawa. xiii + 157 pp. — ENVIRONNEMENT CANADA (EC). 2016. Programme de rétablissement du carcajou (Gulo gulo), population de l’Est, au Canada, Série de Programmes de rétablissement de la Loi sur les espèces en péril, Environnement Canada, Ottawa, viii + 27 p. — INSTITUT NATIONAL DE SANTÉ PUBLIQUE DU CANADA. 2014. Changements climatiques et santé en Eeyou Istchee dans le contexte des évaluations environnementales. Direction de la santé environnementale et de la toxicologie. Octobre 2014. En ligne : https://www.inspq.qc.ca/pdf/publications/1927_Changements_Climatiques_Eeyou_Istchee.pdf. Consulté le 11 décembre 2019. — MINISTÈRE DES FORÊTS, DE LA FAUNE ET DES PARCS (MFFP). 2019. Statistiques de chasse et de piégeage. En ligne : http://mffp.gouv.qc.ca/faune/statistiques/chasse-piegeage.jsp. Consulté le 19 janvier 2019. — MINISTÈRE DES FORÊTS, DE LA FAUNE ET DES PARCS (MFFP). 2001a. Fiche descriptive du campagnol- lemming de Cooper. Gouvernement du Québec. Site internet : http://www3.mffp.gouv.qc.ca/faune/especes/menacees/fiche.asp?noEsp=51 . Consulté le 19 décembre 2019.

— MINISTÈRE DES FORÊTS, DE LA FAUNE ET DES PARCS (MFFP). 2001b. Fiche descriptive de la Belette pygmée. Gouvernement du Québec. Site internet : https://www3.mffp.gouv.qc.ca/faune/especes/menacees/fiche.asp?noEsp=47. Consulté le 19 décembre 2019. — PRESCOTT, J. et P. RICHARD. 2004. Mammifères du Québec et de l’Est du Canada. 2e édition. Guide nature Quintin, Waterloo. 399 p. — REGROUPEMENT QUÉBECOISEAUX. 2015. Programme de suivi québécois des engoulevents. Guide du participant. 14 p. — STATISTIQUE CANADA. 2017. Profil du recensement, Recensement 2016. En ligne: http://www12.statcan.gc.ca/census-recensement/2016/dp-pd/prof/index.cfm?Lang=F. Consulté le 9 décembre 2019.

WSP JAMES BAY LITHIUM MINE PROJECT NO. 191-01753-00 ANSWERS TO PRECISION REQUEST ON ANSWER TO QUESTIONS (1ST SERIES) RECEIVED FROM THE CANADIAN PAGE 82 ENVIRONMENTAL ASSESSMENT AGENCY AS PART OF THE ENVIRONMENTAL REVIEW OF THE PROJECT GALAXY LITHIUM (CANADA) INC. – DECEMBER 2019

APPENDIX

AD-A-31

GEOCHEMICAL STUDY

TECHNICAL MEMO

TO Dominique Thiffault FROM Julia Dent

DATE 08 November 2019 CONFIDENTIALITY Confidential

SUBJECT Galaxy Lithium Project: Update to facility water quality modelling

Introduction WSP Canada have engaged WSP UK to provide an update to the geochemical modelling studies provided in 2018 for the Galaxy Lithium James Bay pegmatite project in Quebec, Canada (WSP, 2018). The original study was used to support engineering design and environmental assessment of the project. This technical note includes an update to the geochemical testwork used in the previous studies, an update to the water balance (completed by Stantec) as well as an updated mine plan (including final pit shell and waste (completed by Stantec and Mining Plus)). This new information was used to update the original geochemical models to predict the discharge from the retention pond and the water quality of the pit lake.

Updated geochemical testwork Samples for geochemical analysis were collected in 2018 and analysed for a range of testwork which is detailed and reviewed in the 2018 report. A number of column tests were started in 2018, which involved sampling of leachate from the columns on a weekly basis. At the time of the 2018 report only 5 weeks of data was available. These tests were continued for a final period of 50 weeks in total. The updated information from the column tests will show the long term risk from the waste and tailings material over an extended period of time. The initial data from the first 5 weeks show a first flush of higher solute load, as the tests progress this has decreased to a steady state to show longer term conditions. The column tests conducted were leach tests on waste material, one with saturated conditions and one with unsaturated conditions, and an unsaturated column leach test on the expected tailings material. The waste material used in the column test is of equal rock types to the material that will be placed on the waste rock facility (Table 1).

Table 1 Breakdown of waste rock material in the mine plan

Geological unit Overall waste rock breakdown (%)

M1 (gneiss / metasediment) 84

M2 (banded gneiss / metasediment) 14

V3B (basalt) 1

I1G (pegmatite) 0.15

For the first four weeks, the leachate produced from the column tests was measured weekly for a range of physico-chemical parameters, and dissolved and total metals.. From week four onwards, dissolved and

www.wsp.com total metals were measured every other week up to week 10, and then solely total metals were measured from week 10 to the end of the test. The conductivity, pH, alkalinity and arsenic (As) in leachates is shown graphically in Figure 1 to Figure 4. A summary of the leachate chemistry produced in the tests is presented in Table 2. The conductivity is relatively low, only reaching a high of between 200 – 350 µS/cm at the start of the tests. The conductivity declines quickly over the first few weeks, and then stabilises at around 20 µS/cm for the tailings material, and around 40 µS/cm in the waste columns. This shows very little solute load is leached over long-term conditions from the waste and tailings samples over the 50 week test period. The first flush of the tailings and waste material contains the highest solute load. There is a spike in the conductivity measured in leachates in week 34 for the waste and week 35 for the tailings. It is believed that this maybe a laboratory measurement error, as the spike happened at the same time within all three columns. The pH of the column tests starts at around pH 7.50 to 8.75 for the first 5 weeks and then decreases until around week 35. From this point onwards the pH stabilises between pH 6.0 and pH 6.5. Acidity is mostly recorded at less than 2 mg/l CaCO3 in the leachates, across the 50 week test period. The initial alkalinity recorded in column leachates in the first few weeks measures between around 31 mg/l CaCO3 and 60 mg/l

CaCO3. The alkalinity in all columns declines and then stabilises at less than 10 mg/l CaCO3 from around week 20 onwards. There are occasional spikes in alkalinity in later weeks. Overall the waste and tailings has limited alkalinity available, but also very little acidity is produced therefore overall there is little risk of long term acidic leachate. As is found at concentrations over 0.3 mg/l in the saturated waste rock column, and over 0.1 mg/l for the unsaturated waste rock and tailings columns. As noted in the first geochemical modelling report the initial leachate As concentration from the saturated waste rock column is higher than the Directive 19 limit of 0.2 mg/l. The As concentration reduces rapidly in the tailings column, and stabilises around 0.05 mg/l from week 10 onwards. The waste rock columns show a more gradual decline in concentrations, and from week 30 onwards leachate from both columns is less than 0.05 mg/l. The concentrations towards the end of the column tests comply with the limit values. Iron released in leachate during the first week is found at concentrations of 2.95 and 4.29 mg/l in the saturated and unsaturated waste rock columns, and 8.87 mg/l in the leachate from the tailings column. This could be a result of remobilisation of secondary iron minerals on the surface of the material from weathering of the waste and tailings samples. Apart from one other high iron concentration recorded from the unsaturated waste rock column, the iron concentration in leachate was less than 1 mg/l for duration of the 50 weeks. Under regular flushing periods (i.e. towards the end of the column time period) iron weathering products do not appear to be building up on the waste rock and tailings surface, as seen by the low concentrations of iron towards the end of the test. Although if prolonged dry periods occurred there could be a build up of iron hydroxides and other weathering products on the surface of waste and tailings. No other significant parameters are noted at higher concentrations than the water quality limits in Table 2.

Confidential Page 2 Figure 1 Conductivity in leachates from column tests over 50 week duration

Figure 2 pH in leachates from column tests over 50 week duration

Confidential Page 3 Figure 3 Arsenic measured in column leachates over a 50 week period

Figure 4 Alkalinity recorded in column test leachates

Confidential Page 4 Figure 5 Iron concentrations in column test leachates

Confidential Page 5 Table 2 Summary table for column tests leachate chemistry

Criteria DMS Tailings Unsaturated Waste Rock Unsaturated Waste Rock Saturated Directive MMER Weeks 11 Weeks 11 Weeks 11 Week 0 Week 1-4 Weeks 5 - Week 0 Week 1-4 Weeks 5 - Week 0 Week 1-4 Weeks 5 - Parameters Units 019 Avg. Avg. DL - 50 - 50 - 50 (metals (metals 10 (metals (metals (metals 10 (metals (metals (metals 10 (metals Monthly Monthly (metals (metals (metals dissolved) dissolved) dissolved) dissolved) dissolved) dissolved) dissolved) dissolved) dissolved) Limit Limit total) total) total) pH - 7.65 7.82 7.37 6.86 7.48 7.60 7.17 6.82 7.66 7.76 7.47 6.79 ORP mV 282 142 267.00 275.90 282 290 251.00 250.90 258 285 254.33 222.35 Alcalinité mg/L as 2 31 16 31.33 8.95 33 28 14.67 7.80 35 32 17.33 8.20 (mg/l) CaCO3 Conductivité µS/cm 2 107 40 31.67 18.85 135 125 53.67 39.60 129 115 78.33 45.55 Sulfates mg/L 0.08 #N/A #N/A 1.00 1.26 #N/A #N/A 10.60 7.56 #N/A #N/A 14.00 9.74 Calcium mg/L 0.013 11.9 4.1 3.16 2.23 8.1 8.3 5.13 4.61 7.5 9.0 8.63 5.25 Magnésium mg/L 0.002 2.3 0.4 0.31 0.22 4.0 1.5 0.80 0.73 3.8 1.4 0.92 0.53 Potassium mg/L 0.008 11.1 3.9 1.61 0.59 18.2 10.1 3.37 1.31 16.3 9.3 3.82 1.10 Sodium mg/L 0.002 14.0 4.6 0.31 0.53 11.2 6.3 0.58 1.00 10.5 4.6 0.46 0.82 Aluminium µg/L 1 27500 294 591.67 542.60 11900 114 231.67 581.75 11800 153 167.33 92.28 Antimoine µg/L 0.02 0.8 1.5 1.93 0.34 1.1 1.9 2.03 0.36 0.9 1.6 1.73 0.39 Argent µg/L 0.005 0.49 0.03 0.03 0.03 0.09 0.03 0.03 0.03 0.09 0.03 0.03 0.03 Arsenic µg/L 200 500 0.03 316 111 66.03 46.69 123 146 118.33 53.82 131 272 171.67 49.51 Baryum µg/L 0.02 94.2 1.1 2.66 1.80 141.0 11.9 6.54 8.29 121.0 10.1 6.01 4.68 Béryllium µg/L 0.005 18.5 0.19 0.39 0.29 1.16 0.01 0.02 0.04 0.95 0.004 0.00 0.02 Bismuth µg/L 0.004 39.6 0.33 0.72 0.44 0.44 0.01 0.01 0.05 0.29 0.01 0.00 0.02 Bore µg/L 3 65 21 6.33 5.95 49 30 9.33 4.15 34 26 10.67 3.80 Cadmium µg/L 0.01 0.669 0.010 0.01 0.01 0.036 0.006 0.00 0.02 0.038 0.005 0.00 0.01 Chrome µg/L 0.05 24.3 1.0 1.80 0.98 27.5 0.2 0.80 2.01 26.6 0.1 0.10 0.16 Cobalt µg/L 0.01 8.9 0.3 0.26 0.16 5.2 0.5 0.54 0.80 5.0 0.4 0.20 0.96 Cuivre µg/L 300 300 0.1 44.5 2.0 2.05 1.13 8.0 0.3 0.72 0.95 8.3 0.5 0.89 0.26 Étain µg/L 0.1 68.1 36.6 6.29 1.26 61.0 28.9 6.63 1.58 51.5 25.9 8.43 2.04 Fer µg/L 3000 1 19200 214 608.00 364.80 7550 61 214.00 595.65 7570 32 19.00 52.00 Lithium µg/L 0.03 1230 1630 465.00 155.49 665 412 94.57 58.85 614 308 88.20 52.21 Manganèse µg/L 0.01 3090 32 79.60 44.60 154 26 8.63 34.70 148 23 21.00 82.86 Mercure µg/L 0.27 0.01 0.02 0.01 0.02 0.01 0.01 0.01 0.01 0.01 0.03 0.01 Molybdène µg/L 0.01 4.69 3.63 1.71 0.93 1.98 2.29 0.35 0.19 1.99 1.50 0.41 0.16 Nickel µg/L 500 500 0.03 29.1 0.9 0.87 0.55 20.1 3.3 2.23 2.37 18.7 2.1 0.63 2.87 Plomb µg/L 200 200 0.003 70.8 0.5 1.28 0.83 4.6 0.1 0.14 0.32 4.4 0.1 0.35 0.10 Sélénium µg/L 0.4 0.12 0.05 0.02 0.02 0.54 0.34 0.12 0.08 0.57 0.27 0.10 0.08 Strontium µg/L 0.03 141 17 14.50 12.12 109 103 45.63 34.49 101 94 68.87 41.91 Thallium µg/L 0.01 1.68 0.04 0.05 0.04 0.62 0.04 0.03 0.04 0.54 0.04 0.02 0.01 Thorium µg/L 0.5 4.20 0.10 0.10 0.08 6.60 0.06 0.10 0.18 6.10 0.05 0.05 0.05 Titane µg/L 0.4 118 3 7.73 6.14 619 4 14.39 38.65 578 2 0.82 2.15 Uranium µg/L 0.003 89.1 3.7 1.59 0.96 4.7 7.0 2.67 1.29 4.0 7.6 4.43 0.65 Vanadium µg/L 0.07 11.5 1.8 1.64 1.19 20.1 1.4 1.45 1.79 19.4 2.2 1.59 0.52 Zinc µg/L 500 500 0.3 366 4 9.00 7.40 22 1 3.33 3.40 23 1 1.00 1.90 NOTES: (1): Critères d'Eau de consommation (EC) ou de Résurgence dans les eaux de surface (RES) du Guide d'intervention - Protection des sols et réhabilitation des terrains contaminés (MDDELCC, 2016). (2): Limite de détection rapportée par le laboratoire d'analyses. (3) : Ajustement de la valeur du critère en fonction de la dureté de l'eau (CaCO3) inférieure à 10 mg/L.

LÉGENDE: - : Non défini ou non analysé 100 : Concentration > EC 100 : Concentration > SA 100 : Concentration > RES www.wsp.com Retention basin water quality

CONCEPTUALISATION The model for the retention basin is conceptualised as per the original model described in the Geochemical Modelling report (WSP report 171-02562-00_GC_R1, 2018). Any changes to inputs and set-up are described in this report, otherwise inputs and set-up can be assumed to match the previous description. Due to changes in the available data, a slightly different set of results have been produced. Three years have been modelled for both wet and dry climate scenarios, as opposed to one year previously. This provides a range of results for the new mine plan, rather than just one year of results.

UPDATED WATER BALANCE, MINE PLAN AND GEOCHEMISTRY The changes incorporated into the retention basin model include the following: § Changes to the mine plan (Mining Plus and Stantec). § Updated site wide water balance model, completed by Stantec (Galaxy Lithium – Mine Wide Water Balance, September 2019, Stantec). § Updated chemistries based on the full results from the column tests (described above). The mine plan has increased from 16 years for run of mine to 18 years (with one year within that as pre- production). This includes changes to the final pit layout. The final total waste and tailings amounts have decreased slightly, by around 7,800,000 tonnes. The cumulative tonnages of ore, waste and tailings over life of mine (LOM) are presented in Figure 6, and the ratio of waste and tailings deposited in the waste rock and tailings storage facility (WRTSF) are shown in Figure 7. These vary slightly over LOM, but average at around 0.82 waste rock to 0.18 tailings. Years 1 to Year 3 have a slightly higher volume of tailings produced in comparison to waste. As such, Year 3 will be included in the retention basin model to show this variety in waste and tailings ratio and how the water quality in the retention basin changes as a result. As before, Year 10 is also modelled and in addition a model for Year 17 has also been included to show the variance in the final year of operations.

www.wsp.com Figure 6 Cumulative ore, waste and tailings over LOM

Figure 7 Proportion of waste and tailings in WRTSF

Confidential Page 8 The water balance for the new mine plan was completed by Stantec (Galaxy Lithium – Mine Wide Water Balance, September 2019, Stantec). The elements within the water balance are essentially the same as the 2018 model. The one update is that the water balance now provides an estimation of the breakdown of the water emanating from the pit, between groundwater inflow and runoff. In the previous model this was included within the geochemical model but the split between groundwater inflow and pit runoff was based on an estimation rather than calculation within the water balance. The breakdown of the proportions in the water balance, which correspond to a specific chemistry within the geochemical model, are shown in Table 3 for the three scenarios modelled. The water balance presented shows two scenarios, wet and dry, which are based on the climate statistics for wetter or dryer years. For geochemistry it is assumed that the drier years will produce poorer water qualities, and the wetter years potentially better water qualities (assuming rainfall and dilution are controlling factors).

Table 3 Water balance components for retention basin model

Water balance component Dry Wet Year 3 Year 10 Year 17 Year 3 Year 10 Year 17 Waste rock contact runoff and seepage 34.5% 33.4% 30.6% 31.8% 31.6% 29.9% Tailings contact runoff and seepage 11.4% 6.4% 7.2% 10.5% 6.1% 7.0% Sedimentation pond 12.2% 6.1% 6.8% 13.0% 6.3% 6.9% Groundwater inflows to the pit 9.1% 14.9% 17.2% 9.7% 15.5% 17.4% Runoff collected in the pit 22.3% 33.8% 32.4% 23.7% 35.1% 32.8% Direct precipitation 10.6% 5.3% 5.9% 11.3% 5.5% 6.0% Evaporation -6.9% -3.4% -3.8% -7.3% -3.6% -3.9%

The input chemistry used within the models was based on the column tests described above and monitoring data collected in previous studies. The chemical inputs are described in the 2018 modelling report, unless stated below. The PHREEQC model requires dissolved concentrations as inputs, therefore the chemistry from earlier in the column tests was used rather than the total concentrations, representative of long-term steady state conditions, measured later in the evolution of the columns. This also acts as a more conservative assessment, as the water chemistry of the leachates produced in the tests improved as the column tests progressed. The chemistry inputs used within the models are presented in Table 4 and Table 5. A change included in this modelling update is the chemistry used to represent the contact water of waste rock in the basin and the pit wall runoff, based on further information from the column tests. The waste rock still accounts for a mix of unsaturated and saturated waste rock as before. The unsaturated waste rock uses the chemistry for the unsaturated waste rock column from weeks 1 – 4, and from the saturated waste rock column from weeks 5 – 10. The runoff generated from the pit wall is now based on the column test data from the unsaturated waste during weeks 1 to 4. Scaling of the waste rock and pit runoff chemistry is analogous to the models completed previously. Direct precipitation and evaporation are assumed to have no mass load and a pH of 5.5 (to mimic the natural chemistry of rainfall). Evaporation is the removal of pure water and does not remove solute load from the model.

Confidential Page 9 Table 4 Estimated inflow chemistry for retention basin model for the 10 year dry conditions

Parameter Units Waste Tailings From the Groundwater Pit wall rock contact Sedimentation near pit runoff contact water in Pond water in basin basin pH pH units 7.58 7.65 4.23 7.38 7.60 Alkalinity mg/L as 26.4 31.0 0.8 49.2 31.2 CaCO3 pe pe units 8.5 8.4 6.0 4.0 8.5 Ca mg/L 45.7 65.5 1.4 10.3 14.9 Mg mg/L 7.64 12.7 0.48 1.93 2.6 K mg/L 50.39 61.1 0.34 2.13 18.2 Na mg/L 29.75 77.0 1.55 16.26 11.3 Cl mg/L n/a n/a 1.4 1.3 n/a SO4 mg/L 50 50 0.3 11.9 20.0 Al mg/L 0.67 151.25 0.20 0.08 0.20 Sb mg/L 0.001833 0.004400 0.000004 0.000389 0.003330 Ag mg/L 0.000025 0.002695 0.000002 0.000012 0.000045 As mg/L 0.1494 1.7380 0.0009 0.0934 0.2619 Ba mg/L 0.011 0.518 0.004 0.013 0.021 Be mg/L 0.000006 0.101750 0.000010 0.000044 0.000011 Cd mg/L 5.6E-06 3.7E-03 1.8E-05 9.2E-06 1.1E-05 Cr mg/L 0.0002 0.1337 0.0010 0.0005 0.0004 Co mg/L 0.00047 0.04890 0.00022 0.00039 0.00092 Cu mg/L 0.00040 0.24475 0.00032 0.00162 0.00055 Sn mg/L 0.0259 0.3746 n/a 0.0011 0.0521 Fe mg/L 0.055 105.600 1.615 0.087 0.110 Hg mg/L 8.3E-06 1.5E-03 1.0E-06 1.0E-06 9.0E-06 Li mg/L 0.3630 6.7650 0.0008 0.5847 0.7407 Mn mg/L 0.025 16.995 0.025 0.125 0.047 Mo mg/L 0.00201 0.02580 0.00004 0.00158 0.00412 Ni mg/L 0.00288 0.16005 0.00043 0.00300 0.00590 Pb mg/L 9.9E-05 3.9E-01 4.1E-04 6.9E-05 9.9E-05 Se mg/L 0.00030 0.00066 0.00012 0.00037 0.00061 Sr mg/L 0.098 0.776 0.016 0.126 0.185 U mg/L 0.00660 0.49005 0.00001 0.00065 0.01256 V mg/L 0.00146 0.00792 0.00144 0.00144 0.00259 Zn mg/L 0.001 2.013 0.005 0.004 0.002

Confidential Page 10 Table 5 Estimated inflow chemistry for retention basin model for the 10 year wet conditions

Parameter Units Waste Tailings From the Groundwater Pit wall rock contact Sedimentation near pit runoff contact water in Pond water in basin basin pH pH units 7.58 7.65 4.23 7.38 7.60 Alkalinity mg/L as 26.4 31.0 0.8 49.2 31.2 CaCO3 pe pe units 8.5 8.4 6.0 4.0 8.5 Ca mg/L 24.9 35.7 1.4 10.3 8.3 Mg mg/L 4.17 6.9 0.48 1.93 1.5 K mg/L 27.49 33.3 0.34 2.13 10.1 Na mg/L 16.23 42.0 1.55 16.26 6.3 Cl mg/L n/a n/a 1.4 1.3 n/a SO4 mg/L 50 50 0.3 11.9 20.0 Al mg/L 0.37 82.50 0.20 0.08 0.11 Sb mg/L 0.001833 0.002400 0.000004 0.000389 0.001850 Ag mg/L 0.000025 0.001470 0.000002 0.000012 0.000025 As mg/L 0.1494 0.9480 0.0009 0.0934 0.1455 Ba mg/L 0.011 0.283 0.004 0.013 0.012 Be mg/L 0.000006 0.055500 0.000010 0.000044 0.000006 Cd mg/L 5.6E-06 2.0E-03 1.8E-05 9.2E-06 6.4E-06 Cr mg/L 0.0002 0.0729 0.0010 0.0005 0.0002 Co mg/L 0.00047 0.02667 0.00022 0.00039 0.00051 Cu mg/L 0.00040 0.13350 0.00032 0.00162 0.00031 Sn mg/L 0.0259 0.2043 n/a 0.0011 0.0289 Fe mg/L 0.055 57.600 1.615 0.087 0.061 Hg mg/L 8.3E-06 8.1E-04 1.0E-06 1.0E-06 5.0E-06 Li mg/L 0.3630 3.6900 0.0008 0.5847 0.4115 Mn mg/L 0.025 9.270 0.025 0.125 0.026 Mo mg/L 0.00201 0.01407 0.00004 0.00158 0.00229 Ni mg/L 0.00288 0.08730 0.00043 0.00300 0.00328 Pb mg/L 9.9E-05 2.1E-01 4.1E-04 6.9E-05 5.5E-05 Se mg/L 0.00030 0.00036 0.00012 0.00037 0.00034 Sr mg/L 0.098 0.423 0.016 0.126 0.103 U mg/L 0.00660 0.26730 0.00001 0.00065 0.00698 V mg/L 0.00146 0.00432 0.00144 0.00144 0.00144 Zn mg/L 0.001 1.098 0.005 0.004 0.001

Confidential Page 11 RESULTS The retention basin modelling results for wet and dry conditions, for the LOM years 3, 10 and 17, are presented in Table 6 to Table 8. The results are similar to those produced in the previous set of models, and are compared with applicable effluent limits defined by Directive 019 and MMER. The results typically present a water quality between 7.7 and 7.9. As previously stated, under field conditions, it is expected that the pH in the basin may actually be closer to pH 7.5, as most of the water types that mix in the basin have a pH around this value. Concentrations of all solutes are simulated to be compliant with both regulations. Solute loads in the dry climate scenarios are typically around double those of the wet climate scenarios, as there is less dilution for the released mass load from the waste, tailings and pit wall rock. The parameters modelled are compliant with the effluent limits defined by Directive 019 and MMER. However, Asconcentrations do reach up to 0.15 mg/l in the Year 10 dry climate scenario, which is close to the 0.2 mg/l Directive 019 monthly average limit. These modelling results are based on a simplified conceptualisation, commensurate with the limited geochemical data available to date and the level of current understanding of water flow dynamics in the pit and retention basin. For instance, single chemistries have been assigned to a compound of runoff and seepage generated from waste rock or tailings, while in reality runoff and seepage are expected to have markedly different degrees of interaction with the waste materials and resulting chemical signatures. It is likely that the simulated parameter values are subject to a degree of uncertainty and are also likely to fluctuate significantly over time during a single year and over different years due to changing climatic conditions. The realisations completed here are for a snapshot of an annual water balance. Moreover, the PHREEQC model was set up to simulate sorption of As and other trace metals onto iron precipitates, assuming a good contact between the percolating water and the iron precipitates in the waste pile. At field scale, due to the kinetics and location of precipitates this process may be less efficient, and As in the waste pile contact water may be more elevated than predicted. Based on the geochemical test data, which flags As as a constituent of potential concern, it is expected that As may exceed MMER and/or Directive 019 limits at least occasionally. Provisionally, the design of water treatment infrastructure should be based on the assumption that removal of As will be necessary at least during part of each year to ensure compliance with Directive 019 and MMER limits. A more detailed study of the hydraulics of the waste and tailings in the retention basin, combined with the current geochemistry dataset, could be completed should a more detailed prediction be required.

Confidential Page 12 Table 6 Retention basin geochemical model results - LOM year 3

Résultats MMER: préliminaires du Directive 019: Maximum modèle geochimique Average Authorized Paramètres Unité Monthly Monthly Year 3 Year 3 Concentratio Mean Wet Dry n Concentratio n Physico- chemical pH - 7.7 7.9 6,5 à 9,5 6,0 à 9,5 Alkalinity (as mg L-1 21.7 31.3 CaCO3) Major ions Calcium mg L-1 16.0 29.6 Chlorures mg L-1 0.3 0.3 Magnesium mg L-1 2.8 5.0 Potassium mg L-1 16.1 30.7 Sodium mg L-1 13.8 24.9 L- mg SO4 Sulphate 1 29.2 30.5 Métaux traces Aluminium mg L-1 0.006 0.009 Antimoine mg L-1 0.003 0.005 Argent mg L-1 0.0002 0.0004 Arsenic mg L-1 0.053 0.074 0.2 0.5 Baryum mg L-1 0.03 0.04 Béryllium mg L-1 8.1E-06 9.2E-06 Cadmium mg L-1 0.00008 0.00010 Chrome mg L-1 0.008 0.014 Cobalt mg L-1 0.002 0.002 Cuivre mg L-1 0.00032 0.00039 0.3 0.3 Fer mg L-1 0.00007 0.00006 3 Lithium mg L-1 0.96 1.80 Manganèse mg L-1 0.00012 0.00006 Mercure mg L-1 0.000034 0.000079 Molybdène mg L-1 0.00440 0.00834 Nickel mg L-1 0.004 0.005 0.5 0.5 Plomb mg L-1 0.0001 0.0001 0.2 0.2 Sélénium mg L-1 0.00050 0.00090 Strontium mg L-1 0.19 0.35 Uranium mg L-1 0.039 0.076 Vanadium mg L-1 0.0009 0.0010 Zinc mg L-1 0.010 0.011 0.5 0.5

Confidential Page 13 Table 7 Retention basin geochemical model results - LOM Year 10

Résultats préliminaires du modèle geochimique MMER: Directive 019: Maximum Paramètres Unité Average Monthly Authorized Year 10 Year 10 Concentration Monthly Mean Wet Dry Concentration

Physico- chemical pH - 7.7 7.8 6,5 à 9,5 6,0 à 9,5 Alkalinity (as mg L-1 22.9 27.9 CaCO3) Major ions Calcium mg L-1 15.1 27.0 Chlorures mg L-1 0.3 0.3 Magnesium mg L-1 2.7 4.6 Potassium mg L-1 15.1 28.2 Sodium mg L-1 13.0 22.0 L- mg SO4 Sulphate 1 28.7 29.4 Métaux traces Aluminium mg L-1 0.006 0.008 Antimoine mg L-1 0.003 0.005 Argent mg L-1 0.0001 0.0002 Arsenic mg L-1 0.101 0.147 0.2 0.5 Baryum mg L-1 0.03 0.04 Béryllium mg L-1 1.0E-05 1.2E-05 Cadmium mg L-1 0.00007 0.00008 Chrome mg L-1 0.005 0.009 Cobalt mg L-1 0.002 0.002 Cuivre mg L-1 0.00041 0.00049 0.3 0.3 Fer mg L-1 0.00007 0.00006 3 Lithium mg L-1 0.83 1.49 Manganèse mg L-1 0.00011 0.00008 Mercure mg L-1 0.000020 0.000039 Molybdène mg L-1 0.00394 0.00722 Nickel mg L-1 0.005 0.005 0.5 0.5 Plomb mg L-1 0.0001 0.0001 0.2 0.2 Sélénium mg L-1 0.00051 0.00090 Strontium mg L-1 0.18 0.32 Uranium mg L-1 0.026 0.050 Vanadium mg L-1 0.0017 0.0021 Zinc mg L-1 0.011 0.010 0.5 0.5

Confidential Page 14 Table 8 Retention basin geochemical model results - LOM Year 17

Résultats préliminaires MMER: du modèle geochimique Directive Maximum 019: Average Authorized Paramètres Unité Monthly Monthly Year 17 Year 17 Concentratio Mean Wet Dry n Concentratio n Physico- chemical pH - 7.8 7.9 6,5 à 9,5 6,0 à 9,5 Alkalinity (as mg L-1 24.2 29.8 CaCO3) Major ions Calcium mg L-1 15.1 26.3 Chlorures mg L-1 0.3 0.3 Magnesium mg L-1 2.7 4.5 Potassium mg L-1 14.8 27.1 Sodium mg L-1 13.3 22.0 L- mg SO4 Sulphate 1 28.2 28.4 Métaux traces Aluminium mg L-1 0.007 0.008 Antimoine mg L-1 0.003 0.005 Argent mg L-1 0.0001 0.0003 Arsenic mg L-1 0.086 0.120 0.2 0.5 Baryum mg L-1 0.03 0.03 Béryllium mg L-1 1.1E-05 1.3E-05 Cadmium mg L-1 0.00007 0.00008 Chrome mg L-1 0.006 0.010 Cobalt mg L-1 0.002 0.002 Cuivre mg L-1 0.00044 0.00053 0.3 0.3 Fer mg L-1 0.00006 0.00006 3 Lithium mg L-1 0.85 1.49 Manganèse mg L-1 0.00010 0.00007 Mercure mg L-1 0.000022 0.000044 Molybdène mg L-1 0.00396 0.00709 Nickel mg L-1 0.004 0.005 0.5 0.5 Plomb mg L-1 0.0001 0.0001 0.2 0.2 Sélénium mg L-1 0.00050 0.00086 Strontium mg L-1 0.18 0.31 Uranium mg L-1 0.028 0.052 Vanadium mg L-1 0.0014 0.0016 Zinc mg L-1 0.010 0.009 0.5 0.5

Confidential Page 15 Pit lake water quality

CONCEPTUALISATION The model for the pit lake in closure is conceptualised as per the original model described in the Geochemical Modelling report (WSP report 171-02562-00_GC_R1, 2018). Any changes to inputs and set- up are described in this report, otherwise inputs and set-up can be assumed to match the previous description. In the previous 2018 modelling study the pit lake model water chemistry results were presented as the water chemistry at the point of discharge following the completion of pit lake filling up to the spill point elevation in the open pit. The chemistry of the pit lake discharge point is presented in this report for comparison. In addition, an estimation of how the chemistry may evolve as the lake is forming (only under the lower flow scenario) is also included to provide additional information.

UPDATED MINE PLAN, WATER BALANCE AND GEOCHEMISTRY

MINE PLAN The final pit shell for the planned mine has changed following updates to the mine plan. The new final pit shell is shown in the schematic in Figure 8. The stage vs. volume curve and stage vs. lake surface area curve were derived from the final pit shell (Figure 9). The spill point is likely to be between 208 and 211 mRL, depending how the smaller pit attached to the main pit is connected.

Figure 8 Schematic of final pit shell used in pit lake filling model

Confidential Page 16 Figure 9 Stage-Volume and Stage-Surface area curves for the final pit lake filling model

GROUNDWATER INFLOWS AND WATER BALANCE The groundwater inflows for the pit lake water balance was derived from the FEFLOW groundwater model for the Galaxy project area, updated in 2019. The pit lake model included two scenarios originally to estimate the likely range of groundwater inflow values after mine closure. The updated groundwater modelling has provided new inflow values for Scenario 1 (low groundwater flow), based on the calibrated model where the rocks surrounding the pit have a very low permeability. The inflow values for Scenario 2 (high groundwater flow) assume that the pit is connected to the more permeable paragneiss unit at some point, based on the relationship with Scenario 1 flows as predicted in the 2018 models. The groundwater inflow rate for the two scenarios are shown in Table 9. All other elements of the water balance, such as climate data, are the same as the 2018 models. The lake forms over 172 years for the low groundwater inflow scenario, and year 111 for the high groundwater inflow scenario. A summary of the water balance, provided in 10-year intervals, is shown for both scenarios in Table 10 and Table 11.

Confidential Page 17 Table 9 Estimated groundwater inflows to the final pit under two flow scenarios

Model Elevation Groundwater inflow (m3/d)

SC 1: Calibrated model (very low permeability) Lowest elevation 420

Elevation 50 m 407

Elevation 150 m 334

Elevation 209 m 0

SC 2: Connected with the paragneiss unit at some Lowest elevation 1218 point Elevation 50 m 1224

Elevation 150 m 1174

Elevation 209 m 0

Table 10 Summary of pit lake water balance for Scenario 1 (low permeability)

Pit Lake Pit Lake Pit Lake Groundwat Rainfall+Sno Pit wall Water Evaporatio Year Volume Surface er Inflow w on lake runoff Level n (m3) (m3) Area (m2) (m3) (m3) (m3) (mRL)

- 10 65 441,150 3,932,700 97,595 1,600,614 2,066,884 197,414

- 20 93 776,004 7,392,969 159,995 1,369,126 1,662,400 347,261

- 30 113 1,186,070 10,986,976 226,222 1,382,802 1,555,899 530,765

- 40 127 1,495,550 14,369,571 258,268 1,274,545 1,281,757 669,257

- 50 138 1,770,611 17,596,605 318,544 1,196,100 1,052,670 792,346

- 60 148 2,060,945 20,925,255 344,370 1,216,635 973,341 922,270

Confidential Page 18 Pit Lake Pit Lake Pit Lake Groundwat Rainfall+Sno Pit wall Water Evaporatio Year Volume Surface er Inflow w on lake runoff Level n (m3) (m3) Area (m2) (m3) (m3) (m3) (mRL)

- 70 157 2,522,731 24,355,054 404,101 1,197,693 838,294 1,128,919

- 80 164 2,460,396 27,280,609 433,627 923,653 642,530 1,101,024

- 90 171 2,885,280 30,362,767 490,057 871,604 616,434 1,291,159

- 100 177 3,299,534 33,365,861 506,493 748,235 431,862 1,476,538

- 110 182 3,014,076 35,930,469 524,861 559,321 340,007 1,348,796

- 120 187 3,326,808 38,577,744 533,960 496,507 312,703 1,488,743

- 130 192 3,769,079 41,317,391 588,255 422,603 234,624 1,686,658

- 140 196 3,603,272 43,688,400 596,564 290,192 90,005 1,612,460

- 150 200 3,821,770 46,088,887 603,710 220,111 68,843 1,710,238

- 160 203 3,038,927 47,913,005 611,586 115,030 30,078 1,359,916

- 170 207 4,259,089 50,362,971 618,827 79,609 17,206 1,905,937

- 180 209 1,190,598 50,975,463 620,638 6,333 1,919 532,791

- Sum 44,921,891 12,217,45 13,970,711 20,102,492 5

% 19.7% 63.1% 17.2% -28.3%

Confidential Page 19 Table 11 Summary of pit lake water balance for Scenario 2 (connectivity to higher permeability)

Pit Lake Pit Lake Pit Lake Pit wall Water Groundwat Rainfall+Sno Year Volume Surface runoff Evaporatio Level er Inflow w on lake (m3) Area (m2) (m3) n (m3) (mRL) (m3) (m3) - 10 92 634,953 7,233,694 158,508 4,822,142 1,980,708 284,141 - 20 124 1,262,314 13,604,640 251,713 4,263,579 1,401,900 564,884 - 30 145 1,861,385 19,901,089 338,483 4,196,658 1,060,544 832,967 - 40 161 2,415,128 25,988,311 427,133 3,936,263 801,512 1,080,767 - 50 173 2,957,295 31,354,586 498,887 3,114,453 600,011 1,323,386 - 60 181 2,908,601 35,406,670 521,048 2,083,713 354,124 1,301,596 - 70 188 3,164,442 39,112,636 535,844 1,655,033 296,983 1,416,084 - 80 194 3,541,694 42,498,888 592,897 1,244,174 160,299 1,584,904 - 90 199 3,706,256 45,486,090 601,894 858,528 75,979 1,658,545 - 100 204 4,364,022 48,525,497 613,396 576,438 44,520 1,952,895 - 110 207 2,997,237 50,362,971 618,827 167,945 9,618 1,341,260 - 120 210 1,066,844 50,975,463 620,638 19,947 1,719 477,411 - Sum 30,880,170 26,938,873 6,787,918 13,818,839 % 41.7% 47.7% 10.5% -21.4%

GEOCHEMICAL DATA The water quality for the source terms was derived on the same basis as for the retention basin model, and also for the previous 2018 model. The groundwater quality used within the model is the same monitoring data as per the previous model. The water quality of the pit wall runoff was estimated using the week 1 – 4 data from the unsaturated waste rock HCT, using the same scaling factor as the 2018 models. Rainfall and snowmelt onto the lake water table, and evaporation from the lake were represented as pure water with a pH of 5.5. The source term water chemistries are shown in Table 12.

Confidential Page 20 Table 12 Estimated source term water chemistries used in the pit lake model

Parameter Units Groundwater Pit wall Rainfall / near pit runoff snowmelt / evaporation pH pH units 7.4 7.6 5.5 pe pe units 4 1 4 Alkalinity mg/l 49 28 - CaCO3 Ag mg/l 1.2E-05 5.0E-05 - Al mg/l 0.08 0.23 - As mg/l 0.09 0.29 - Ba mg/l 0.01 0.02 - Be mg/l 4.4E-05 1.2E-05 - Ca mg/l 10.3 16.5 - Cd mg/l 9.2E-06 1.3E-05 - Cl mg/l 1.3 - - Co mg/l 0.0004 0.0010 - Cr mg/l 0.0005 0.0004 - Cu mg/l 0.0016 0.0006 - F mg/l 0.22 - - Fe mg/l 0.09 0.12 - Hg mg/l 0.000001 0.000010 - K mg/l 2.1 20.2 - Li mg/l 0.6 0.8 - Mg mg/l 1.9 2.9 - Mn mg/l 0.13 0.05 - Mo mg/l 0.002 0.005 - Na mg/l 16.3 12.6 - Ni mg/l 0.003 0.007 - Pb mg/l 6.9E-05 1.1E-04 - Sulphate mg/l 11.9 20.0 - Sb mg/l 0.0004 0.0037 - Se mg/l 0.0004 0.0007 - Si mg/l 7.0 - - Sn mg/l 0.001 0.058 - Sr mg/l 0.13 0.21 - Tl mg/l 2.3E-05 8.5E-05 - U mg/l 0.0006 0.0140 - V mg/l 0.0003 0.0029 - Zn mg/l 0.004 0.002 -

Confidential Page 21 RESULTS The results for the water quality at the end of the pit lake filling time, at the point of discharge from the lake, are tabulated in Table 13. This includes both the low groundwater inflow scenario, and the high groundwater inflow scenario. The evolution of the water chemistry over time as the pit lake forms for the low groundwater inflow scenario is also shown graphically in Figure 10 to Figure 12, up to the time point where the pit lake reaches the spillage point. The simulated pH for the low inflow scenario is pH 7.7 and for the higher inflow scenario pH 7.8, compliant with Directive 019 and MEMR average monthly limits. The dissolved iron concentration is predicted to be 0.03 mg/l for the low inflow scenario and 0.01 mg/l for the higher inflow scenario. This is within the Directive 019 and MMER average monthly limits. The final filled mix for the pit lake has dissolved As concentration around 0.1 mg/l, less than both the Directive 019 and MMER average monthly limits. However, Figure 12, shows that initial estimated concentration for As at the beginning of the pit lake filling mix has As concentrations slightly elevated above the Directive 019 limits. Following ongoing dilution this As concentration drops over time. Iron concentrations in both inflow scenarios is predicted to be less than 0.05 mg/l for the final pit lake chemistry at the point where the pit lake spills over, plus for Scenario 1 inflows. This is a variation to the initial model results in 2018, where iron concentrations were predicted to be over or closer to the Directive 019 limit. The variation is caused by the updated column test results, which are used to represent the pit wall runoff (Table 12), as the iron concentrations were only very high in the initial flush, and were much lower following longer term flushing of the columns.

Table 13 Modelling results of the water quality in the pit lake for the low and high groundwater inflow scenarios

Paramètres Unité Résultats préliminaires du modèle Directive MMER: geochimique 019: Maximum Scenario 1 Low Scenario 2 High Average Authorized Inflow Inflow Monthly Monthly Concentrat Mean ion Concentrat ion Physico- chemical pH - 7.7 7.8 6,5 à 9,5 6,0 à 9,5 Alkalinity (as mg L-1 19.0 27.8 CaCO3) Major ions Calcium mg L-1 6.8 7.7 Chlorures mg L-1 0.4 0.7 Magnesium mg L-1 1.2 1.4 Potassium mg L-1 5.4 3.8 Sodium mg L-1 7.5 10.3

Sulphate mg SO4 8.0 9.0 L-1 Métaux traces

Confidential Page 22 Paramètres Unité Résultats préliminaires du modèle Directive MMER: geochimique 019: Maximum Scenario 1 Low Scenario 2 High Average Authorized Inflow Inflow Monthly Monthly Concentrat Mean ion Concentrat ion Aluminium mg L-1 0.005 0.008 Antimoine mg L-1 0.00099 0.00070 Argent mg L-1 0.00002 0.00001 Arsenic mg L-1 0.095 0.089 0.2 0.5 Baryum mg L-1 0.01 0.01 Béryllium mg L-1 0.0000 0.0000 Cadmium mg L-1 0.00001 0.00001 Chrome mg L-1 0.000 0.000 Cobalt mg L-1 0.000 0.000 Cuivre mg L-1 0.00059 0.00094 0.3 0.3 Fer mg L-1 0.03 0.01 3 Lithium mg L-1 0.36 0.42 Manganèse mg L-1 0.047 0.074 Mercure mg L-1 0.000003 0.000002 Molybdène mg L-1 0.00153 0.00145 Nickel mg L-1 0.002 0.002 0.5 0.5 Plomb mg L-1 0.000 0.000 0.2 0.2 Sélénium mg L-1 0.00026 0.00029 Strontium mg L-1 0.08 0.09 Uranium mg L-1 0.004 0.002 Vanadium mg L-1 0.001 0.001 Zinc mg L-1 0.002 0.003 0.5 0.5

Confidential Page 23 Figure 10 pH evolution over pit lake filling timeframe

Figure 11 Alkalinity evolution over pit lake filling timeframe

Confidential Page 24 Figure 12 Arsenic evolution over pit lake filling timeframe Summary and conclusions Three column flushing tests were set-up in 2018 to investigate the behaviour of waste rock and tailings following successive flushing episodes. The tailings column used unsaturated conditions, and two waste rock columns were instigated, one in unsaturated conditions and one saturated. The columns were completed over a 50 week period, and leachate samples taken from the columns weekly. For the first iteration of modelling in 2018, only the first few weeks from the column tests was available. The updated modelling here includes data following the completion of the 50 week test. All three of the columns showed a first flush response, where iron and other weathering products were flushed from the waste rock and tailings material placed in the columns. Following this the solute load released in the leachate from the columns reduced and overall the total dissolved solids is low, particularly from week 15 onwards. The pH is circum-neutral through the test, and stabilises in the last 10 weeks of the 50 week period at around pH 6 – 6.5. Generally, apart from the first flush leachate, there are few parameters above the Directive 019 and MMER average monthly regulatory standards. The exceptions to this are iron in the first flush leachate, and As in the saturated waste column leachate in the first few weeks of the test. The concentration of both iron and As decreased to below the Directive 019 and MMER as the column tests evolved and was generally at stable low concentrations over the remainder of the test. The geochemical models for the retention basin and the final pit lake filling model were completed using the same conceptualisation as for the 2018 models, but with updates to the water chemistry, water balance and mine plan where described. For the geochemical model of the retention basin, two water qualities were simulated for 10-year dry and 100-year wet climatic conditions over three different mine life years. For all scenarios, all simulated parameters are compliant with both Directive 019 and MMER average monthly limits. For As,

Confidential Page 25 concentrations between 0.053 mg/L and 0.147 mg/L are predicted under the six scenarios, below the Directive 019 limit of 0.2 mg/L and the MMER limit of 0.5 mg/L. Based on the results of the column tests, and the geochemical model of the retention basin, provision for the design of any water treatment infrastructure for the retention basin discharge should be based on the assumption that removal of As may be necessary at least during part of each year to ensure compliance with Directive 019 and MMER limits, as extreme flushing events of salt build-ups may raise concentrations of As above limits. Should a more detailed water balance or mine plan become available, we recommend that the geochemical models are refined to take into account any changes in conceptualisation or setting. For the geochemical model of the final pit lake, two water qualities were simulated for low and high groundwater inflow values. Dissolved As in both scenarios is about to 0.1 mg/L, compliant with both Directive 019 and MMER, but relatively close to the Directive 019 limit of 0.2 mg/L. All other parameters are also compliant with both Directive 019 and MMER average monthly limits. During the evolution of the pit lake for Scenario 1 (low groundwater inflows), the first few years suggest As concentrations may be elevated above Directive 019 standards. This is during the filling stage of the pit lake, and water in the open pit would not be discharged to the environment at this point. As the filling of the open pit continues, the As concentration decreases to below the Directive 019 standard of 0.2 mg/l, due to increased dilution of contact water inflows. As for the retention basin model, a degree of uncertainty remains regarding the likely solute concentrations in the final pit lake (particularly regarding As), due to the limited current knowledge about the future pit lake dynamics. Should further information become available we would recommend refining the pit lake filling model and chemistry prediction.

References Galaxy Geochemistry Facility Water Quality Modelling Report, 171-02562-00, WSP, August 2018 Galaxy Lithium – Mine Wide Water Balance, 121622255, September 2019, Stantec

Confidential Page 26 APPENDIX

AD-D-34

EFFLUENT DISCHARGE OBJECTIVES (FRENCH ONLY)

tûinistèrc de I'Envirormerrlênl et de la lcrtte contre ler câangcnrenl: ctimatiques tr EIEI ^. ttUeD€C rr rr Objectifs environnementaux de rejet Débit d'eaux usées d'origine domestique >20 m3/d

INFORMATIONS SUR LA DEMANDE Demandeur : Murielle Vachon Date de réception de la 2019-04-02 (A-M-J) : Direction de t'évatur,,on.nuironnlmentate des projet, norJiqr.r.. ÏT:nde

Objet : Eaux usées domestiques de la mine Galaxy - Mine de lithium Baie-James

No dossier : s.o. No dossier DAE : 16891 No SCW : s.o.

CONTEXTE DE LA DEMANDE

Cette future mine de lithium, en plus de ses eaux de procédé, générera des eaux usées de nature domestique en provenance du campement de travailleurs. La capacité de ce campement sera de 280 personnes lors de la phase de construction et de 150 personnes lors de la phase d'exploitation. Des débits de 56 et de 30 m'/d seront générés pendant les phases de construction et d'exploitation, respectivement.

Un système de traitement de type réacteur biologique rotatif (Écoprocess avec technologie MBBR de Premier Tech) sera mis en place. Des unités de déphosphatation et de désinfection sont également prévues. |]effluent, une fois traité, sera reieté directement dans le cours d'eau cÊ3.

CONTEXTE ENVIRON N EM ENTAL

Le proiet miniêr est situé dans le bassin versant de la rivière Eastmain dont la superficie est d'environ 46 0OO km'. ll s'agit d'un territoire où les milieux humides, la végétation basse, les affleurements rocheux et les lacs sont dominants.

Le cours d'eau récepteur des eaux usées traitées, le cours d'eau CE3, est situé à proximité du projet minier. ll s'écoule vers l'est sur 3,0 kilomètres avant d'atteindre le lac Asiyan Akwakwatipusich. ll poursuit ensuite son cours sur une quinzaine de kilomètres puis reioint la rivière Eastmain. La superficie de son bassin versant, au point de rejet de l'effluent, a été évâluée à 3,6 km']. ll s'agit d'un cours d'eau oermanent dont la vitesse d'écoulement est faible et dont les eaux sont fortement colofées. Aucun usage n'y a été répertorié. ll s'écoule toutefois à proximité des futurs bâtiments miniers (locaux administratifs).

REMARQU ES/RECOM MAN DATIONS

Les objectifs environnementaux de rejet (OÊR) sont présentés à la page suivante.

L'oER en coliformes fécaux a pour but de maintenir la salubrité du cours d'eau récepteur puisqu'il s'écoule à proximité de bâtiments.

Si des modifications sont apportées au projet en termes de débit d'effluent, de localisation du point de reiet ou l'ajout d'ouvrages de surverse, nous recommandons d'être consultés à nouveâu.

Direction des avis et des expertises page I OBJECTIFS ENVIRONNEMENTAUX DE REJET ProjFt Eaux qsée! domestiqu€s de lâ mine Galâxy Mine de lithium.BâieJames ; - _ Municipâlité: Êeyou lstchee Bâie- tBassinversant: Rivière Eastmain JâMES - Milieu récepteur: cours deau cÊ3 i boordonnées du point de tât. :52,24481753 i oébit {11:56 et reiet : Long. :77,08714763 . 30 m3/d

Contaminants Concentration r Charge allouée (kgld) i Période d'application i Usages sensibles allouée i Construction/exploitation I DBOs 3,9 tzt OrUOI nnne

I n/lri 6,0 0,3/02 Année I Vie aquatique

I Ëhô;ôh;à fôfar -(3) Rnnée I Eutrophiiation (me/!- P) I Coliformes fécaux 1 o0o(4) uFC/100 ml 1er mai - 30 novàmbre | ,rlubrité I

I I gô r.rHr ruHi * L,22lsl O,O 7 /0,04 1"' juin - novembre I Vie aquatique (me/l - N) 1,94 tst 0l/0,06 1"'décembre - 31 mai I

I rôiiciié àiile- l gljiet Année I vie rôrrtique

(11 Débits : Un débit de 56 m3/d est prévu à la phase de construction et un débit de 30 m3ld est prévu en phase d'erploitation de la mine.

(21 DSOrr Le respect d'une norme annuelle de 15 m&/l est acceptable pour la protection du milieu récepteur.

(31 Phosphorê : Le rejet est prévu en amont du lac Asiyan Akwâkwatipusich qui sere considéré comme un lac sous surveillance dans la prochainê v€rsion de la Pos rbn du MELCC sut lo téduction du phosphorc dons les rciets d'eoux usées d'origine domestique. (exigence doit être fixée selon les tebleâux 1et 2 de cette Position.

(tl| Coliformes fécaux : L'OER en coliformes fécaux s'applique au nombre de bactérles après photoréactivation (s'il y a lieu).

(51Arote âmmoniecal : Ces valeurs sont étâblies pour un pH de 6,5 et des températures de 5.C en hiver et de 20 ôC en été. Cette valeur de pH, même slelle ne représente pas ce quia été mesuré dans ce cours d'eâu (valeur médiânê de 4,1) est la valeur limite inférieure pou.le calcul du critère de l'azote ammoniâcal. Pour les projets d'assainissement ne comportant pas de fortes charges en azote ammoniacal, I'OER pour ce paramètre n'est fourni qu'à titre indicatif. ll n'y a pes d'exigences de rejet, mais un suivi à l'effluent de ce contaminant et du pH est eri8é. (61Toricité: Les essâis suivants sonl rccommondés: Dophnio mogno lclso-48 h), protocole CEAÊQ 2011, MA 500-D.mag. 1.1; ruite arc{n-ciel (CLso-96 h), protocole d'Ênvironnement canada 2000 modifié 2007, SPE 1/RM/13.

Référence :

MrNtsTÈRÊ DU DÉVELOPPEMENT DURABLE, DE L'ENV|RONNÉMENT ET DES PARCS (MDOEP), 2007. Calcul et interprétation des objectifs environnementaux de rejet pour les contaminants du milieu aquatique, 2e édition, Québec, ministère du Développement durable, de l'Environnement et des parcs, Direction du suivi de l'étât de l'environnement, ISBN-978-2-550-49172-9 (PDF), 56 p. et 4 annexes.

Nom de l'analyste à la DAE : Danielle Pelletier Date : 17 avril 2019 î,w 40,^ dP DP-mg/ml c.c. Mme Caroline Boiteau, DAE

Directlon des avis et des expertises page 2 Annexe I : Mine de lithium Baie-James à Eeyou Istchee Baie-James OER pour les effluents finaux rejetés aux cours d'eau CE2 et CE3

20t9-05-02

Concentrations Critères allouées Périodes Contaminants Usages (r) mgl à l'effluent d'application mgl

Conventionnels Matrères en suspension CVAC 8 (2) E Année Métaux Argent CVAC 0,00010 0.00010 (3) Année

Arscnrc cPC(O) 0.02 | 0.02 | Annee Baryum CVAC 0.038 (4) 0.038 Annee Cadmium CVAC 4.98-05 (4) 4.9Ë-05 (3) Année Chrome CVAC 0.0il (s) 0,01 | Annee Cuivre CVAC 0.0011 (4) 0.00 | 3 Annee Fer CVAC l.l t.l Année l-ithium CVAC 0..1{ 0.44 Année Manganèsc CVAC 0.26 (-t ) 0.16 Annee Mercure CFTP l.lE-06 t.3F.-06 llr Année Nrckel CVAC 0.0074 (4) 0.0074 Année Plomb CVAC 0.000 t7 (4) 0.000 | 7 (l) Année

[Jran i um CVAC 0.0 t4 (1) 0.0 t4 Année Zrnc CVAC 0,0t7 (4) 0,0t7 Annee Autres paramètres Azote ammoniacal (estival) (rng/l-N) CVAC 1.2 (6) t,2 l er l uin-30 nov Azote ammoniacal (hivernal) (mdl-N) CVAC 1,9 (6) 1,9 ler déc -3l mai

F luorures CVAC 1.5 (7) t.5 Année Nitrates (mg/l-N) CVAC 3.0 3.0 Année CVAC 0,04 (8) 0.04 Année lNitrites (mg/l-N) CVAC (e) Année P' CVAC 500 ( l0) 500 Année lSulfàtes lEssais de toxicité

I arBuê VAFe U'l'a UI'a (ll) Année |'orrcrte CVAC tJl'c UTc (12) Année [l'orrcitc'chronique lParamètres de suivi I Survi (ll) Annee lConductrvitc' I Suir r (ll) Année It)urcte (13) lSolrdcs drssous totaux Survt Année

CPC(O) : Critère de prévention de la contamination des organismes aquatiques CFTP : Critère de faune terrestre piscivore VAFe: Valeur aiguë finale à l'effluent CVAC : Critère de vie aquatique chronique

La comparaison entre les OER et les concentrations mesurées (ou attendues) à l'effluent doit être effectuée sef on les modalités de l'addenda Comparaison entre les concentrations mesurées à l'elfluent et les objectifs enyironnementeux de rejet pour les entreprise:; existantes (MDDELCC, 2017) du document Ligne.s direclrices pour l,urilisation de1; ob.jecti/.r enrironnementaux de rejet relatifs aux reiets indu.striels dans le milieu aqualique (MDDEP, 2008). À cet effet, les recommandations de la section 4.5 doivent être suivies. i

, Annexe I : Mine de lithium Baie-James à Eeyou Istchee Baie-James OER pour les effluents finaux rejetés aux cours d'eau CE2 et CE3 - Suite

2019-05-02

(2) Le calcul du critère de matières en suspension (MES) correspond à une augmentation de 5 mg/l par rapport à la concentration naturelle. Celle-ci a été estimée à 3 mg/|, soit [a médiane des données mesurées sur les cours d'eau CE2 et CE3 (WSP,2018).

(3) ll est nécessaire d'utiliser pour le suivi de tous les contaminants des méthodes analytiques ayant une limite de

détection plus petite ou égale à I'OER. Les paramètres suivants ont une limite de détection plus élevée que I'OER : argent 5E-04 mg/l; cadmium 2E-04 mg/l; mercure 6E-05 mg/l et plomb lE-03 mg/1. Pour ces paramètres, I'absence de détection à la limite précisée sera interprétée comme un respect de I'OER.

(4) Critère calculé pour un milieu récepteur dont la dureté médiane est de l0 mg/l CaCO1, valeur plancher qui est utilisée pour le calcul des critères de qualité de la majorité des métaux. Le milieu a une dureté de 5 mg/l selon les données mesurées sur les cours d'eau CE2 et CE3 (WSP,20l8).

(5) L'OER du chrome est établi à partir du critère du Cr Vl. Une analyse des différentes formes permet de préciser le risque lorsque la concentration mesurée à I'effluent est supérieure à I'OER.

oC (6) Les critères applicables à I'azote ammoniacal sont déterminés pour une température de 20 en été et de 5 oC en hiver et pour une valeur de pH de 6,5 qui est la valeur minimale utilisable pour les fins du calcul.

(7) Critère calculé pour une dureté de l0 mg/l CaCOr (Michigan,20l3).

(8) Le critère des nitrites est calculé pour un milieu récepteur dont la concentration médiane en chlorures est de 2 mgll selon les données mesurées sur les cours d'eau CE2 et CE3 (WSP, 2018).

(9) L'exigence réglementaire de 6,0 à 9,5 n'est pas applicable ici en raison des caractéristiques particulières du milieu récepteur dont les eaux de surface sont très acides (autour de pH 4). ll est donc recommandé de maintenir le pH de chaque effluent final à une valeur la plus proche possible du pH des eaux naturelles.

( l0) Le critère de qualité des sulfates est calculé pour un milieu récepteur dont la dureté est de l0 mg/l CaCOret la concentration en chlorures est de 2 m{l selon les données mesurées sur les cours d'eau CE2 et CE3 (WSP, 20 l8).

( I I ) L'unité toxique aiguë (UTa) correspond à 100/CL50 (%ovlv) (CL50 : concentration létale pour 50 % des organismes testés). Les essais de toxicité demandés sont spécifiés à l'annexe 2.

( l2) L'unité toxique chronique (UTc) correspond à 1OO/CSEO (CSEO : concentration sans effet observable) ou 100/CI25 (CI25: concentration inhibitrice pour 25o/o des organismes testés). Les essais de toxicité sont spécifiés à l'annexe l.

( l3 ) Aucun OER n'est établi pour ce paramètre mais un suivi est demandé à des fins d'interprétation.