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Oyu Tolgoi Mining and Processing EIA

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<strong>Oyu</strong> <strong>Tolgoi</strong> Project <strong>Mining</strong> <strong>and</strong> <strong>Processing</strong> <strong>EIA</strong>Environment Factor Objective Existing Environment Potential Impact Environmental Management Predicted Outcome3. POLLUTION MANAGEMENT (continued)3.2 Water Quality To ensure that emissions donot adversely affect theenvironmental values or thehealth, welfare or amenity ofcommunities by meetingappropriate World Bankst<strong>and</strong>ards <strong>and</strong> Mongolianregulations.Shallow groundwater qualityis generally unaffected byindustrial contaminants orenriched nutrients. Waterquality meets stock watercriteria.Surface springs water qualityis highly variable, dependingon river conditions. Stock<strong>and</strong> wildlife use of thesprings increases turbidity<strong>and</strong> nutrient levels.Short term episodic riverflows are associated withhigh turbidity levels.Potential contamination ofshallow groundwater fromtailings seepage, ARD leachate,putrescible waste disposal <strong>and</strong>hazardous chemical storage <strong>and</strong>use.Indirect discharges fromstormwater run off may impactsprings.Potential long term degradationof groundwater quality fromincreased salinity <strong>and</strong> reducedpH within the final pit voids.Risk of water quality reductiondue to drawdown ofgroundwater from bore fielduse.Implementation of water qualitymanagement plans will ensureindirect mine discharges <strong>and</strong> stormwater meet appropriate criteria forthe protection of environmentalvalues.Tailings storage facilities to haveseepage monitoring <strong>and</strong> collectioncapabilities.ARD management plan will manage<strong>and</strong> monitor problem wastes toensure long term stability <strong>and</strong>prevent contamination of surface orunderground water.Mine closure plan will addresspotential groundwater risks posed bypit voids through implementation ofappropriate <strong>and</strong> sustainable longterm strategies.No long term reduction ofsurface or groundwaterquality resulting from themining operations.Groundwater management Plan willinclude monitoring of aquiferquality <strong>and</strong> established criteria toprevent unreasonable reduction ofwater quality.Prepared by ECO-TRADE LLC.,Environmental Consultants, MongoliaClient: Ivanhoe Mines Mongolia Inc(IMMI) XXKPart II. Chapter 10. Page 14

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