APPENDIX 21B: RISK REGISTER - Casinomining

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IV:onomIcentsmentomeabilitymicpmentinessAPPENDIX 21B: RISK REGISTERVolume V:addItIonalyesareQuIrements20 Effects of theEnvironment onthe Project20a Climate Change Report21 Accidents andMalfunctions21a Regulatory Setting21B Risk RegisterunitynityucturevicesEconomicne Reportl Continuitye 1 Archaeologicalgationoric Resource Impactssment of thegold Roadse and TenureUse and Tenureline Report22 ConceptualEnvironmentalManagement Plans22a Road Use Plan22B EmergencyResponse Plan22c CyanideManagement Plan23 Monitoring Plans23a Wildlife Mitigation andMonitoring Plan24 Conclusion25 ReferencesCASINO PROJECT Proposal for Executive Committee Review Jan 2014

Appendix 21BCasino ProjectAccidents and MalfunctionsRisk iningOAccident/MalfunctionHazard scenarioRisk AssessmentDesign kelyVery LowHighSpills will be contained on site and willnot enter into the surroundingenvironment.VC InteractionMitigation / ManagementRisk LevelSignificanceSpill Contingency PlanEmergency Response PlanLowNot significantBlasting trials will be implemented when there areobserved changes in the characteristics of the rock duringexcavation. Slope monitoring will be conducted during allstages of open pit development.LowNot significantSpill of fuel from mobile and stationary storageduring refueling and maintenance in pitTwo mobile re-fuelers and two portable fueling stations supplyLNG to required locations throughout the Casino mine sitePit wall failureSlope failure or instability in surrounding terrain Slope design for Open Pit is based on kinematic and rock massstability analysis and site-specific geotechnical andhydrogeological information; Design factors considered in selecting the final open pit wallangle include slope height, rock mass strength, ground waterpressure, blasting, and the inter-ramp anglesPossibleLowModerateSlope failure in surrounding terrain wouldbe limited to small slumpsSlump in NW edge of pit as pit edgeintersects Canadian Creek couldSurface Water and Sediment Qualityintroduce sediment into the watercourse effects would be localized andremediated, with no residual impactsWildlife likely not present within fly rockzone due to avoidance of humanpresenceWildlifeEmergency Response PlanLowNot significantNo existing public infrastructure inproximity to pitNo VC effectEmergency Response PlanNon-actionableNot significantLowNot significantSurficial Geology, Terrain, and SoilsNon-actionableNot significantSurficial Geology, Terrain, and SoilsLowNot significantNon-actionableNot significantHazardous materials spill1.bMiningO, CD, PC1.cMiningOUncontrolled ExplosionFly rock from blasting causing injury or mortality towildlifeBlasting carried out by a licensed explosives d ExplosionAir overpressure damage to public infrastructureBlasting carried out by a licensed explosives contractorUnlikelyVery LowHigh1.eMiningOPump malfunction or high flow event - pitDischarge of deleterious substances tooverflow during operations resulting inenvironmentrelease of contact waterRareModerateModerate1.fMiningO, CD, PCOre stockpiles slope failureDeposit of material into surrounding terrain,blockage of collection or diversion ditches at toeresulting in discharge of deleterious substances toenvironment (sediment)1.gMiningO, CD, PCOre stockpiles erosionBlockage of collection or diversion ditches at toeresulting in discharge of deleterious substances toenvironment (sediment)1.hMiningOMotor vehicle collision resulting in spillHazardous materials spillNOTESPhase C Construction O Operation Closure and Decommissioning CD Post-Closure PCA series of pumps and collection systems will transfer water fromthe pit excavation to a surface sump located near the primarycrusher for recycle to the milling processDesign measures to minimize the risk of ore stockpile slopefailures include: Geological information and geotechnical site conditions derivedfrom site investigations Designed to remain stable under static and seismic loadingconditions; the minimum acceptable factor of safety for staticconditions is 1.3 for short-term operating conditions and 1.5 afterclosure and reclamation The design earthquake defined for seismic stability assessmentof the stockpile slopes was the 1 in 500 year earthquake andearthquake magnitude of 8.0. The 1 in 100 year 24-hour storm event was used to sizediversion ditches Sediment control fencing is placed around ore stockpiles toprevent sediment discharge 20 m benches along the toe of each lift will capture sloughing orravelling materialAll movement of vehicles within the Open Pit is monitored by acentral dispatching system to ensure worker health and safety andefficiency in operationRareVery LowHighPossibleVery LowHighRareVery LowHighNo VC effectWater potentially discharged to CanadianSurface Water and Sediment QualityCreek during high flood events or pumpFish and Fish HabitatfailureMaterial from stockpile slumping intosurrounding terrain would be limited;contact water overflowing diversionditches would flow down gradient to theTMFContact water overflowing diversionditches would flow down gradient to theTMFSpills will be contained on site and willnot enter into the surroundingenvironmentNo VC effectBackup pumpsSpill Contingency PlanEmergency Response Plan

Appendix 21BCasino ProjectAccidents and MalfunctionsRisk dent/Malfunction2.aHLFC, O, CD, PC Heap leach pad embankment failure2.bHLFC, O, CD, PC2.cHLFC, O, CDHazard scenarioDischarge of deleterious substances toenvironment (sediment, barren solution,pregnant solution) Heap leach pad foundation excavated to a stable bedrockfoundation - removing frozen overburden mitigates the risk ofpotential settlement events and instability resulting from melting offrozen overburden Closure design will consider the consequence of failure,including the probable maximum site seismic eventBlockage of collection or diversion ditches Bench lift heights of 8 m with repose bench face angles ofHeap leach pad slope failure resulting in oreat toe resulting in discharge of deleterious 1.4H:1V.deposited in surrounding terrainsubstances to environment (sediment) 9 m wide benches will be left at the toe of each liftMitigation / ManagementRisk LevelSignificanceConfidenceUnlikelyVery LowModerateEvents pond immediately downstream designed forsufficient storage capacity to contain the excess HLFNo VC effectsleachate and surface runoff from the 1 in 100 year 24hour storm event without discharge to the environment.Spill Contingency PlanEmergency Response PlanNon-actionableNot significantUnlikelyModerateModerateSolids (ore and liner material) contained on benches orSurficial Geology, Terrain, and Soilsat baseBest Management PracticesErosion and Sediment Control PlanEmergency Response PlanLowNot significantEvents pond overflowUnlikelyVery LowHighOverflow could enter Casino Creek prior to completionof Main Embankment prior to operation. Overflow will Water and Sediment Qualityflow to the TMF and be contained on site duringFish and Fish Habitatoperation.Emergency Response PlanNon-actionableNot significant The embankment designed with a 2H:1V downstream slope anda 3H:1V upstream slope The embankment will be underlain with a 1 m thick drainageblanket layer to promote and facilitate drainage of any ‘leakage’out of the embankment and to discharge into the TMFUnlikelyVery LowHighBarren and pregnant solution would be contained withinNo VC effectsthe TMFEmergency Response PlanNon-actionableNot significantUnlikelyHighHighDischarge will primarily flow to the TMF and becontained on siteEmergency Response PlanLowNot significantEmergency Response PlanModerateNot significantHLFC, O, CDEvents pond embankment failure2.eHLFC, O, CDFailure of the slopes, HLF liner, tanks,pipes, or pumpsDischarge of deleterious substances toenvironment (sediment, barren solution,pregnant solution) Leachate and solution lines are winterized (e.g., heat tracing,insulation) Leachate collection will be conducted within the heap leach padwithin the ore voids rather than in the external free-surface pondFire emitting toxic fumes Reagents used in oxide ore processing are stored, prepared,and distributed in the oxide ore processing facility Fire protection system comprised of a primary fire pump (andbackups) and sprinkler systems will be installed in theaccommodation, administration, laboratory and warehousefacilities A dry sprinkler system will be used for the maintenance facilityC, OVC InteractionConsequence Events pond designed for sufficient storage capacity to containthe excess HLF leachate and surface runoff from the 1 in 100year 24-hour storm event Storage requirements are based on modelled surface runoffresults using the Hydrologic Modeling System2.dHLFRationaleLikelihoodDischarge of deleterious substances toenvironment (sediment, barren solution,pregnant solution)Discharge of deleterious substances toenvironment (sediment, barren solution,pregnant solution)2.fRisk AssessmentDesign MeasuresFire involving processing reagentsNOTESPhase C Construction O Operation Closure and Decommissioning CD Post-Closure PCRareHighModerateSome reagents combustible at high temperatures orreact with other chemicals e.g., Sodium Cyanide maybe combustible at high temperature - it will producetoxic and flammable vapors of CN-H and sodium oxide;contact with acids and acid salts causes immediateformation of toxic and flammable hydrogen cyanide gasWater and Sediment QualityFish and Fish HabitatWildlifeAir QualityNoiseRare Plants and Vegetation HealthWildlifeSustainable LivelihoodLand Use and Tenure

Appendix 21BCasino ProjectAccidents and MalfunctionsRisk RegisterReferenceNumberComponent/ ActivityPhaseAccident/MalfunctionHazard scenarioRisk AssessmentDesign MeasuresRationaleLikelihoodConsequenceConfidenceVC InteractionMitigation / ManagementRisk LevelSignificance3.aProcessingC, OFailure of tanks, pipes, pumps between HLFand gold recovery building, resulting in release Hazardous materials spillof pregnant solutionLocation of Gold Recovery Building/SART plant within TMFcatchmentRareLowModerateSpill Contingency PlanDischarge will flow to the TMF and be contained onSurficial Geology, Terrain, and SoilsEmergency Response PlansiteLowNot significant3.bProcessingC, OFailure of control system or operator errorduring handling or mixing resulting in on-sitereagent spillHazardous materials spillReagent storage and mixing facilities for the flotation circuitswill be located within a structurally independent buildingadjacent to the flotation buildingPossibleVery LowHighDischarge will flow to the TMF and be contained onSpill Contingency PlanSurficial Geology, Terrain, and SoilsEmergency Response PlansiteLowNot significant3.cProcessingOFailure of mechanical equipment or controlsystem resulting in on-site concentrate spillHazardous materials spillPossibleVery LowModerateConcentrate will be a slurry or semi-solid and willbe contained on siteSurficial Geology, Terrain, and SoilsSpill Contingency PlanEmergency Response PlanLowNot significant3.dProcessingOFailure of the thickeners, pipes, and pumpsDischarge of deleteriousfrom sulphide ore processing facility to the TMFsubstances to environmentand release of PAG tailingsRareModerateModerateMaterial released from tailings pipeline rupture orfrom the plant site would flow down gradient andreport to the TMFSurficial Geology, Terrain, and SoilsSpill Contingency PlanEmergency Response PlanLowNot significantModerateSome reagents combustible at high temperatures Air Qualityor react with other chemicals e.g., Sodium Cyanide NoiseRare Plants and Vegetation Healthmay be combustible at high temperature - it willproduce toxic and flammable vapors of CN-H and WildlifeSustainable Livelihoodsodium oxide; contact with acids and acid saltscauses immediate formation of toxic and flammable Land Use and Tenurehydrogen cyanide gasEmergency Response PlanLowNot significant3.eProcessingOFire involving reagentsNOTESPhase C Construction O Operation Closure and Decommissioning CD Post-Closure PCFire emitting toxic fumesCopper concentrate is dewatered and transported as afiltered cake; molybdenum concentrate produced fromsulphide ore is dewatered and packaged in super sacksPAG tailings (or wastes) dewatered and concentrated in apyrite flotation circuit into thickened tailings prior to flowingby gravity via the PAG tailings distribution pipeline to theTMF for subaqueous disposal Reagent storage and mixing facilities for the flotationcircuits are located within a structurally independent buildingadjacent to the flotation building Support buildings will include a fire protection systemcomprised of a primary fire pump (and backups) andsprinkler systems for the accommodation, administration,laboratory and warehouse facilities; dry sprinkler system willbe used for the maintenance facilityRareModerate

Appendix 21BCasino ProjectAccidents and MalfunctionsRisk rd scenarioRisk AssessmentDesign MeasuresLikelihoodO, CD, PCOFailure of tailings embankment andrelease of tailingsTailings distribution pipelines failureDischarge of deleterious(bulk non-PAG tailings, PAG tailings,substances to environmentcyclone sand, cyclone overflow)O, CD, PC TMF supernatant pond overflowO, CD, PC TMF seepage collection failureODischarge of deleterioussubstances to environmentRupture of reclaim water lineThe embankment has been designed in consideration of seismicloading for the 1 in 10,000 year earthquake, which is more robustthan the recommended CDA Guidelines for a "High" classificationof a 1 in 2,500 year earthquake Bulk Non-PAG tailings will be disposed of in the waste storagearea near the southwest end of the TMF Discharge will be from valved off-takes located along the MainEmbankment and from the West Saddle Embankment Slurry pipelines will be drained for shutdowns longer than 2hours to prevent freezingUnlikelyRareConsequenceHighVery LowRationaleVC InteractionEmergency Response PlanScheduled Dam Safety Reviews in accordancewith CDA GuidelinesLowNot significantHighPAG tailings will flow by graivity into the TMF;NAG tailings used in embankment construction orFish and Fish Habitatdischarged to TMF could result in high TSSWater and Sediment Qualityconcentrations and sedimentation in Casino CreekdownstreamEmergency Response PlanSpill Contingency PlanNon-actionableNot significantHigh TMF is in headwaters of Casino Creek, whichminimizes the upstream catchment area andreduces peak flow rate and volume of storm waterFish and Fish Habitatrunoff from the IDFWater and Sediment Quality The operation and construction schedule willtake into account seasonal fluctuation in pondvolume (Haile and Brouwer 2012)Emergency Response PlanSpill Contingency PlanLowNot significantEmergency Response PlanSpill Contingency PlanLowNot significantSediment and Erosion Control PlanEmergency Response PlanSpill Contingency PlanLowNot significantFish and Fish HabitatSurficial Geology, Terrain, and SoilsWater and Sediment QualityWildlifeDischarge of deleterioussubstances to environment Seepage water losses from the TMF are collected in seepagecollection systems constructed downstream of the embankments.The seepage is collected and pumped back into the TMF 20m wide low permeability core located in the MainEmbankment is surrounded by filter and transition zonesconstructed from crushed and screened rock; the filter zonesfunction in the prevention of piping and porewater pressureincreases, while the transition zone prevents migration of finesPossibleLowHighNon-PAG tailings beach provides a lowpermeability transition zone between the coarseFish and Fish Habitatand permeable waste rock in the waste storagearea and the TMF embankments will function as a Water and Sediment Qualityseepage limitation and control measure betweenthe two areasDischarge of deleterioussubstances to environment(erosion causingsedimentation)Contained within the TMF pondPossibleVery LowHighWater discharged from a ruptured pipeline wouldreport to the TMFNOTESPhase C Construction O Operation Closure and Decommissioning CD Post-Closure PCSignificanceHighDischarge of deleterioussubstances to environmentModerateRisk LevelEmbankment raises constructed by a centerlineraise construction method result in an inherentlystable structure that does not rely on the strengthof the deposited tailings solids; selected becauseof its superior seismic and static stability ascompared to upstream construction methods TMF is designed with considerations for flood events, seismicevents, and meets regulations and requirements according to theCDA for a “High” consequence dam failure The Inflow Design Flood (IDF) for a "High" consequence dam asdefined by the CDA is 1/3 between 1/1,000 and ProbableMaximum FloodUnlikelyMitigation / ManagementConfidenceFish and Fish HabitatWater and Sediment Quality

Appendix 21BCasino ProjectAccidents and MalfunctionsRisk dent/MalfunctionHazard scenario5.aTopsoil/Overburden &Waste Rock DisposalStockpiles erosion andC, O, CD, PCsedimentationDischarge of deleterious substances toenvironment5.bWaste Rock DisposalC, O, CD, PC Stockpiles and dump slope failureDischarge of deleterious substances toenvironment5.cTopsoil/OverburdenC, O, CD, PC Stockpiles and dump slope failureDischarge of deleterious substances toenvironmentNOTESPhase C Construction O Operation Closure and Decommissioning CD Post-Closure PCRisk AssessmentDesign Measures Soil salvaging and stockpiling operations will require avariety of management practices to ensure that soils arehandled and stored properly during all phases of the minedevelopment Erosion control measures will be implementedDesign measures to minimize the risk of WSA slope failuresinclude: An overall slope of 1.5H:1V TMF will be operated to maintain a minimum distance of 1km between the WSA and TMF embankments to allowdevelopment of a NAG tailings beach and provide a lowpermeability transition zone Trial sections may be constructed in the field during theinitial stages of development to monitor waste pile stabilityand foundation performance Waste rock shall be end dumped over the crest to allowfor maximum segregation of the coarser material at thebase of each benchDesign measures to minimize the risk ofTopsoil/Overburden Stockpile slope failures include: Wet conditions will be avoided when possible during soilsalvage operations Topsoil/Overburden Stockpiles will be limited to amaximum height of about 20 m, with consideration of sitespecific ground conditions, and constructed as wrap arounddumps in an ascending sequence to improve overallstability Overall slope angle will average 14 degrees (4H:1V) tominimize the risk of slope instability, reduce erosionpotential and improve the amenability for vegetation growthRationaleVC InteractionRisk LevelSignificanceBest Management PracticesErosion and Sediment Control PlanEmergency Response PlanLowNot significantSurficial Geology, Terrain, andSoilsBest Management PracticesErosion and Sediment Control PlanEmergency Response PlanLowNot significantFish and Fish HabitatSurficial Geology, Terrain, andSoilsWater and Sediment QualityBest Management PracticesErosion and Sediment Control PlanEmergency Response PlanModerateNot Very LowHighBest practices followedSurficial Geology, Terrain, andSoilsPossibleVery LowHighBest practices followedPossibleModerateHighBest practices followedMitigation / Management

Appendix 21BCasino ProjectAccidents and MalfunctionsRisk dent/MalfunctionHazard scenarioRisk idencePossibleLowModerateBlocked access along roadAccess and transportation management will include materialsmanagement procedures, regular maintenance and inspections for safeoperation, snow clearing, and the application of dust suppressantsThe Road Use Plan will specifies rules for the Freegold Road Extensionincluding potential use of the access road by the public including hunters;speed limits and enforcement; travelling in convoys for safety; truck trafficcommunications; community notification and update process for thevillage of Carmacks6.bTransport of Equipment,Reagent spill resulting from motorMaterials, PersonnelC, O, CDvehicle accidentto/from SiteHazardous materials spill reagents Regular road maintenance, including snow clearing in the winter will becarried out to ensure user safety, preserve the condition of the accessroad, and ensure access to the Casino mine sitemanagement of fuel, hazardous materials and explosives will be inaccordance with applicable regulations and legislative bodies LNG will be transported to the Casino mine site from Fort Nelson, BritishColumbia via double wall vacuum tanker trucksPossibleModerateHigh6.cTransport of Equipment,Materials, PersonnelC, O, CD Wildlife collisionto/from SiteInjury, mortality to wildlifeThe Road Use Plan will specifies rules for the Freegold Road Extensionincluding potential use of the access road by the public including hunters;speed limits and enforcement; travelling in convoys for safety; truck trafficcommunicationsLikelyLowModerateTransport of Equipment,Fire/explosion resulting from motorMaterials, PersonnelC, O, CDvehicle collisionto/from SiteAccess and transportation management will include materialsmanagement procedures, regular maintenance and inspections for safeoperation, snow clearing, and the application of dust suppressantsFire/explosion causing injury,mortality, use of essential services The Road Use Plan will specifies rules for the Freegold Road Extensionincluding potential use of the access road by the public including hunters;RCMP, fire department,speed limits and enforcement; travelling in convoys for safety; truck trafficambulance servicecommunications; community notification and update process for thevillage of Carmacks6.a6.d6.e6.f6.gTransport of Equipment,Materials, PersonnelC, O, CD Collision of mine related-vehiclesto/from SiteTransport of Personnelto/from SiteTransport of Personnelto/from SiteTransport of Personnelto/from SiteC, OC, OC, OInjury, mortality to wildlife Airstrip engineering design will conform to the most current version ofthe Transport Canada Aerodrome Standards and RecommendedPractices (TP 312) Airstrip is located in an area considered to pose few aeronauticalchallenges and provide safe aircraft operations during all visible weatherconditionsHazardous materials spill resultingfrom aviation accident during takeoff Hazardous materials spillor landing Airstrip engineering design will conform to the most current version ofthe Transport Canada Aerodrome Standards and RecommendedPractices (TP 312) Airstrip is located in an area considered to pose few aeronauticalchallenges and provide safe aircraft operations during all visible weatherconditionsFire/explosion resulting from aviationFire/explosionaccident during takeoff or landing Airstrip engineering design will conform to the most current version ofthe Transport Canada Aerodrome Standards and RecommendedPractices (TP 312) Airstrip is located in an area considered to pose few aeronauticalchallenges and provide safe aircraft operations during all visible weatherconditionsAviation accident during takeoff orlandingNOTESPhase C Construction O Operation Closure and Decommissioning CD Post-Closure PCUnlikelyRareRareRareHighLowModerateHighVC InteractionMitigation / ManagementRisk LevelSignificanceFreegold Road Extension may be aSustainable Livelihoodrestricted use road to minimize the riskLand Use and Tenureof accidents with other road usersRoad Use PlanEmergency Response PlanLowNot significant Consequences of an off-site spill willvary, depending on the location of thespill, and volume and characteristics ofmaterial Spills at or near watercoursecrossings could result in widespreadeffects if the substance enters thewatercourseSpill Contingency PlanEmergency Response PlanModerateNot significantRoad Use Plan will be strictly enforced WildlifeRoad Use PlanWildlife Protection PlanModerateNot significantModerateSome reagents combustible at hightemperatures or react with otherchemicals e.g., Sodium Cyanide maybe combustible at high temperature - itwill produce toxic and flammablevapors of CN-H and sodium oxide;contact with acids and acid saltscauses immediate formation of toxicand flammable hydrogen cyanide gasEmergency Response PlanLowNot significantModerate Airstrip design considers factorssuch as elevation, temperature, andweight in determining the amount ofrunway required for takeoff Site not accessible to publicWildlifeEmergency Response PlanWildlife Protection PlanLowNot significantModerate Aircraft used primarily for transportof personnel; any spills would bematerials and amounts required for theaircraft itself Materials entering Dip Creek couldresult in effects beyond the event sitethat would not be readily remediatedSurficial Geology, Terrain, andSoilsWater and Sediment QualityFish and Fish HabitatSpill Contingency PlanEmergency Response PlanLowNot significantModerateAirstrip design considers factors suchas elevation, temperature, and weightin determining the amount of runwayrequired for takeoffEmergency Response PlanModerateNot significantSurficial Geology, Terrain, andSoilsWater and Sediment QualityFish and Fish HabitatSustainable LivelihoodAir QualityNoiseRare Plants and VegetationHealthWildlifeSustainable LivelihoodLand Use and TenureAir QualityNoiseRare Plants and VegetationHealthWildlifeSustainable LivelihoodLand Use and Tenure

Appendix 21BCasino ProjectAccidents and MalfunctionsRisk ityHazardousMaterials StorageHazardousMaterials StorageHazardousMaterials StorageHazardousMaterials StorageRisk AssessmentPhaseAccident/MalfunctionHazard scenarioDesignRationaleLikelihoodC, OC, OC, OC, OHazardous materials spillRelease of ANFO during offloadingSeparate structures are constructed for storage offuel, hazardous materials and explosives inaccordance with applicable regulations and specificpermitting requirementsPossibleVery LowHazardous materials spillSpill of reagents: Spill of liquid chemicals duringoffloading of trucks Release of solid chemicalsduring on-site transfer andhanding Overflow of storage tanks andchemical release Failure of pumps, pipes, valvesand release of chemicals Separate structures for storage of fuel, hazardousmaterials and explosives in accordance to applicableregulations and specific permitting requirements Reagent storage and mixing facilities for flotationcircuits located within a structurally independentbuilding adjacent to flotation buildingPossibleVery LowFire/ExplosionFire/Explosion from improperstorage of fuels, explosives, etc. All storage tanks will be constructed and managedin accordance with the National Fire Code and theEnvironmental Code of Practice for AbovegroundStorage Tank Systems Containing PetroleumProducts Explosives will be prepared and stored inaccordance with the explosives license issued byNatural Resources Canada to a licensed explosivescontractor Explosives and blast caps will be stored in separatefacilities, away from operational areasFire/Explosion Reagent storage and mixing facilities for the flotationcircuits are located within a structurally independentbuilding adjacent to the flotation building Support buildings will include a fire protectionFire involving processing reagentssystem comprised of a primary fire pump (andin the storage areabackups) and sprinkler systems for theaccommodation, administration, laboratory andwarehouse facilities; dry sprinkler system will beused for the maintenance facilityNOTESPhase C Construction O Operation Closure and Decommissioning CD Post-Closure PCUnlikelyUnlikelyVC InteractionMitigation / ManagementRisk LevelSignificanceConsequence ConfidenceModerateModerateHighStorage and handlilng will be in accordance withExplosives Act magazine license requirements Fish and Fish Habitatwith respect to storage and handling ofSurficial Geology, Terrain, and Soilsexplosives and factory license requirementsWater and Sediment Qualitywith respect to the manufacturing of explosivesSpill Contingency PlanEmergency Response PlanLowNot significantHighReagent storage and mixing facilities forFish and Fish Habitatflotation circuits located within a structurallySurficial Geology, Terrain, and Soilsindependent building to ensure that any materialWater and Sediment Qualityreleased is fully captured on siteSpill Contingency PlanEmergency Response PlanLowNot significantSpill Contingency PlanEmergency Response PlanLowNot significantSpill Contingency PlanEmergency Response PlanLowNot significantHighIndustry standards and best practices willensure that any material released is fullycaptured on siteHighSome reagents combustible at hightemperatures or react with other chemicals e.g.,Sodium Cyanide may be combustible at hightemperature - it will produce toxic andflammable vapors of CN-H and sodium oxide;contact with acids and acid salts causesimmediate formation of toxic and flammablehydrogen cyanide gasAir QualityNoiseRare Plants and Vegetation HealthWildlifeSustainable LivelihoodLand Use and TenureAir QualityNoiseRare Plants and Vegetation HealthWildlifeSustainable LivelihoodLand Use and Tenure

Appendix 21BCasino ProjectAccidents and MalfunctionsRisk ityFreegold RoadFreegold RoadRisk AssessmentPhaseAccident/MalfunctionC, O, CD Blocked drainage ditch or culvertC, O, CD Road foundation failureFreegold RoadC, O, CD ErosionFreegold RoadImproper snow managementC, O, CDcreating wildlife barrierHazard scenarioDesignRationaleV

Risk Register Likelihood Consequence Confidence 2.a HLF C, O, CD, PC Heap leach pad embankment failure Discharge of deleterious substances to environment (sediment, barren solution, pregnant solution) Heap leach pad foundation excavated to a stable bedrock foun

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