RCC-RCP Permit#55223 Page 2 of 11 AZRP01816

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1 Company Name : Rosemont Copper Company Date 1/31/13 Permit Type: Permit Number: Class II Synthetic Minor * Eqpt ID Description Annual Units Pollutant EF Units EF Source Control Thru'put % Tons Per Year lbs/ton MINING MN01 Drilling holes/yr PM 1.3 lb/hole AP % PM lb/hole 33%PM PM %PM MN02 Blasting 365 blasts/yr PM lb/blast AP % ave blast area = ft sq ft PM lb/blast afno tons/hole tons AFNO PM lb/blast holes/last CO lb/ton NOX lb/ton SO lb/ton MN03 Loading Concentrate Ore tons PM lbs/ton AP % 9.61 CH lbs/anfo CO lbs/anfo N 2 O lbs/anfo U mph, M -4% PM lbs/ton PM lbs/ton 0.69 MN04 Loading Leach Ore tons PM lbs/ton AP % 7.30 U mph, M -4% PM lbs/ton PM lbs/ton 0.52 MN05 Loading Waste Rock tons PM lbs/ton AP % U mph, M -4% PM lbs/ton PM lbs/ton 2.02 MN06a Hauling Conc Ore to Pri Crusher/stockpile VMT PM lbs/vmt AP % W-305 t; s-5%, p-61days PM lbs/vmt In-pit PM lbs/vmt 8.49 MN06b Hauling Conc Ore to Pri Crusher/stockpile VMT PM lbs/vmt AP % W-305 t; s-5%, p-61days PM lbs/vmt Outside-pit PM lbs/vmt 4.91 MN07a Hauling Leach Ore to Leach Pad VMT PM lbs/vmt AP % 77.7 W-305 t; s-5%, p-61days PM lbs/vmt In-pit PM lbs/vmt 2.00 MN07b Hauling Leach Ore to Leach Pad VMT PM lbs/vmt AP % W-305 t; s-5%, p-61days PM lbs/vmt Outside-pit PM lbs/vmt 4.86 MN08a Hauling Waste Rock to Storage VMT PM lbs/vmt AP % W-305 t; s-5%, p-61days PM lbs/vmt In-pit PM lbs/vmt RCC-RCP Permit#55223 Page 2 of 11 AZRP01816

2 MN08B Hauling Waste Rock to Storage VMT PM lbs/vmt AP % W-305 t; s-5%, p-61days PM lbs/vmt In-pit PM lbs/vmt MN09 Unloading Conc Ore to stockpile tons PM lbs/ton AP % 1.63 U mph, M -4% PM lbs/ton E-05 PM lbs/ton 0.11 MN10 Unloading Leach Ore to Leach Pad tons PM lbs/ton AP % U mph, M -4% PM lbs/ton PM lbs/ton 0.87 MN11 Unloading Waste Rock to Storage tons PM lbs/ton AP % U mph, M -4% PM lbs/ton PM lbs/ton 3.36 MN12 Bulldozers 55,170 hours PM 2.82 lb/hr AP % w Tons, s-5%, +20%factor PM lb/hr In-pit PM lb/hr 8.20 MN13a Water Trucks 59,847 hours PM lb/hr AP % w Tons, s-5%, +20%factor PM lb/hr In-pit PM lb/hr 1.09 MN13a Water Trucks 83,153 hours PM lb/hr AP % w Tons, s-5%, +20%factor PM lb/hr Outside-pit PM lb/hr 1.52 MN14 Graders 87,000 VMT PM 2.00 lbs/vmt AP % w Tons, S-11mph, s-5%, +20%factor PM lbs/vmt Outside-pit PM lbs/vmt 2.69 MN15a Support Vehicles- unpaved roads VMT PM 7.31 lbs/vmt AP % 99.6 W-42.8 t; s-5% PM lbs/vmt 25.6 In-pit PM lbs/vmt 2.56 MN15b Support Vehicles - unpaved roads VMT PM 7.31 lbs/vmt AP % 99.6 W-42.8 t; s-5% PM lbs/vmt 25.6 Outside-pit PM lbs/vmt 2.56 MN16a Support Vehicles - paved roads VMT PM 0.04 lbs/vmt AP % 1.4 W-16.5 t; s-0.2 g/m^2 PM lbs/vmt 0.3 Within PAB PM lbs/vmt 0.07 MN16b Support Vehicles - paved roads VMT PM 0.04 lbs/vmt AP % 6.0 W-16.5 t; s-0.2 g/m^2 PM lbs/vmt 1.2 Outside-PAB PM lbs/vmt 0.29 MN16c Support Vehicles - paved roads VMT PM 0.70 lbs/vmt AP % 64.8 W-10.7 t; s-8.2 g/m^2 PM lbs/vmt 13.0 Outside-pit PM lbs/vmt 3.18 CRUSHING PC01 Wind Erosion of Stockpile 26 acres PM 0.21 tons/acre AP % e-38, s-2.5%, f-4.77%, PE-22 PM tons/acre PM tons/acre RCC-RCP Permit#55223 Page 3 of 11 AZRP01817

3 PC02 Unloading to Pri Crusher Hopper tons PM lbs/ton AP % 2.85 U mph, M -4% PM lbs/ton Water sprays PM lbs/ton 0.20 PC03 Primary Crushing tons PM 0.02 lbs/ton PM/PM 10 PCL Cartridge Filter PCL01 (PC-CADC) PM lbs/ton PM lbs/ton PM 2.5 /PM PC04 Pri Crusher to Hopper discharge tons PM lbs/ton AP % 0.00 U - 1.3mph, M -4% PM lbs/ton enclosed PC05 Hopper discharge to Discharge Feeder tons PM lbs/ton AP PCL U - 1.3mph, M -4% PM lbs/ton Cartridge Filter PCL01 (PC-CADC) PC06 Discharge Feeder to Stkpile Feed Convyr tons PM lbs/ton AP PCL U - 1.3mph, M -4% PM lbs/ton Cartridge Filter PCL01 (PC-CADC) PC07 Stkpile Feed Convyr to Stkpile Tripper Conv tons PM lbs/hr PM/PM 10 PCL U - 1.3mph, M -4% PM lbs/hr E-08 Cartridge Filter PCL03 (SF-CDC) PM lbs/hr PM 2.5 /PM PC08 Stkpile Feed Convyr to covered coarse pile tons PM lbs/ton AP PCL U - 1.3mph, M -4% PM lbs/ton enclosed Cartridge Filter PCL02 (SARTDC) PC09 Wind Erosion of Coarse Ore Stockpile 5 acres PM 0.00 tons/acre AP % e-38, s-2.5%, f-4.77%, PE-22 PM tons/acre enclosed PM tons/acre PC10 Coarse ore Stkpile to Reclaim Feeders tons PM lbs/ton AP % 0.00 U - 1.3mph, M -4% PM lbs/ton under PM lbs/ton ground 0.00 PC11 Reclaim Feeders to Reclaim Convyr tons PM lbs/hr PM/PM 10 PCL U - 1.3mph, M -4% PM lbs/hr E-08 Cartridge Filter PCL02 (SARTDC) PM lbs/hr PM 2.5 /PM PC12 Reclaim Convyr to SAG Mill Feed Convyr tons PM lbs/hr PM/PM 10 PCL U - 1.3mph, M -4% PM lbs/hr E-08 Cartridge Filter PCL12 (SFDC) PM lbs/hr PM 2.5 /PM PC13 Pebble Conveyor No.3 to SAG Mill Feed Con tons PM lbs/ton AP PCL U - 1.3mph, M -4% PM lbs/ton Cartridge Filter PCL12 (SFTDC) PC14 SAG Mill Feed Convyr to SAG Mill tons PM lbs/ton AP % 0.00 U - 1.3mph, M -4% PM lbs/ton Water MILLING M01 Sag Mill tons PM lbs/ton AP % 0.00 PM lbs/ton wet PM lbs/ton 18.5% of PM RCC-RCP Permit#55223 Page 4 of 11 AZRP01818

4 M02 Sag Mill to Trommel Screen tons PM lbs/ton AP % 0.00 PM lbs/ton enclosed M03 Trommel Screen tons PM lbs/ton AP % 0.00 PM lbs/ton wet PM lbs/ton 6.8% of PM M04 Trommel Screen to Pebble Convyr tons PM lbs/ton AP % 0.00 PM lbs/ton clean M05 Pebble Convyr #1 to Pebble Wash Screen tons PM lbs/ton AP % 0.00 PM lbs/ton clean M06 Pebble Wash Screen tons PM lbs/ton AP % 0.00 PM lbs/ton wet PM lbs/ton 6.8% of PM M07 Pebble wash screen to Pebble convyr # tons PM lbs/ton AP % 0.00 PM lbs/ton clean M08 Pebble convyr #2 to SAG Oversize Surge Bin tons PM lbs/ton AP PCL PM lbs/ton Cartridge Filter PCL04 (PCADC) M09 SAG Oversize Surge Bin to Pebble Crusher F tons PM lbs/ton AP PCL PM lbs/ton Cartridge Filter PCL04 (PCADC) M10 Pebble Crusher Feeder to Pebble Crusher tons PM lbs/ton AP % 0.00 PM lbs/ton enclosed M11 Pebble Crusher tons PM lbs/ton AP PCL PM lbs/ton Cartridge Filter PCL04 (PCADC) PM lbs/ton 0.00 M12 Pebble Crusher to Pebble Convyr # tons PM lbs/ton AP PCL PM lbs/ton Cartridge Filter PCL04 (PCADC) COPPER CONCENTRATE DEWATERING AND STACKING CCD01 Copper Concentrate Filters to Conc Convy tons PM lbs/ton AP % % of crusher ore, U-1.3mph, M-10%; PM lbs/ton enclosed PM lbs/ton 0.00 CCD02 Copper Conc convyr to conc loadout stkpile tons PM lbs/ton PCL U-1.3mph, M-10%; PM lbs/ton Cartridge Filter PCL05-06 (CCDC) PM lbs/ton 0.00 CCD03 Wind Erosion of Copper Conc Stockpile 1.17 acres PM 0.00 tons/acre AP % U-1.3mph, M-10%; PM tons/acre enclosed PM tons/acre RCC-RCP Permit#55223 Page 5 of 11 AZRP01819

5 CCD04 Copper Conc loadout stkpile to trucks tons PM lbs/ton PCL U-1.3mph, M-10%; PM lbs/ton Cartridge Filter PCL05-06 (CCDC) PM lbs/ton 0.00 MOLYBDENUM DEWATERING AND PACKAGING MD01 Moly conc Filter to Moly conc dryer 6377 tons PM lbs/ton AP % 0.00 U-1.3mph, M-10%; PM lbs/ton enclosed MD02 Moly conc Dryer 6377 tons PM lbs/hr AP-42 Table MS/ESP 0.00 U-1.3mph, M-10%; PM lbs/hr Wet Scrubber + ESP PM lbs/hr 0.00 MD03 Copper Concentrate Filters to Conc Convy 6377 tons PM gr/dscf MDC U-1.3mph, M-6%; 1500 acfm PM gr/dscf Wet Scrubber -(PC-MDC) dscf PM gr/dscf MD04 Moly Conc bin to Moly conc hopper 6377 tons PM lbs/ton AP % U mph, M -10% PM lbs/ton E-08 PM lbs/ton MD05 Moly conc hopper to Moly conc convyr 6377 tons PM lbs/ton AP % 0.00 U -1.3mph, M -10% PM lbs/ton enclosed PM lbs/ton 0.00 MD06 Moly conc convyr to Moly Packaging & We 6377 tons PM lbs/ton AP MDC 0.99 U mph, M -10% PM lbs/ton E-05 Wet Scrubber -MDC PM lbs/ton 0.07 TAILINGS DEWATERING & PLACEMENT TDS01 Tailings Filters to Tailings Belt Feeders tons PM lbs/ton AP % 0.00 U -1.3mph, M -15% PM lbs/ton enclosed PM lbs/ton 0.00 TDS02 Tailings Belt Feeders to Fixed Belt Feeders tons PM lbs/ton AP % 0.00 U -1.3mph, M -15% PM lbs/ton enclosed PM lbs/ton 0.00 TDS03 Fixed Tailings Convry No.1 to Fixed Tailings C tons PM lbs/ton AP % 0.00 U -1.3mph, M -15% PM lbs/ton enclosed PM lbs/ton 0.00 TDS04 Fixed Tailings Convry No.2 to Fixed Tailings C tons PM lbs/ton AP % 0.52 U -1.3mph, M -15% PM lbs/ton E-06 PM lbs/ton 0.04 TDS05 Fixed Tailings Convry No.3 to Relocatable Co tons PM lbs/ton AP % 0.52 U -1.3mph, M -15% PM lbs/ton E-06 PM lbs/ton 0.04 TDS06 Relocatable Convy to shiftable convyr tons PM lbs/ton AP % 0.52 U -1.3mph, M -15% PM lbs/ton E-06 PM lbs/ton 0.04 RCC-RCP Permit#55223 Page 6 of 11 AZRP01820

6 TDS07 Shiftable convyr to Belt Wagon Convyr tons PM lbs/ton AP % 4.00 U -6.21mph, M -15% PM lbs/ton E-05 PM lbs/ton 0.29 TDS08 Belt Wagon Convyr to Spreader Crawler Mou tons PM lbs/ton AP % 4.00 U -6.21mph, M -15% PM lbs/ton E-05 PM lbs/ton 0.29 TDS09 Spreader Crawler Mounted convyr to Tailings tons PM lbs/ton AP % 4.00 U -6.21mph, M -15% PM lbs/ton E-05 PM lbs/ton 0.29 TDS10 Wind Erosion of Tailings Storage 1500 acres PM 0.02 tons/acre AP % PM tons/acre PM tons/acre 2.27 FUEL BURNING EQUIPMENT FB01 EW Hot Water Generator 6 MMBtu/hr PM 3.30 lbs/1000 gal AP ,2 0% 0.63 Diesel 8760 hrs/yr PM lbs/1000 gal AP ,2, btu/lb PM lbs/1000 gal AP ,2, lb/gal CO 5.00 lbs/1000 gal AP btu/gal NO X lbs/1000 gal AP gals/yr SO lbs/1000 gal AP VOC 0.20 lbs/1000 gal AP CH lbs/1000 gal 40CFR98 TblC CO lbs/1000 gal 40CFR98 TblC N 2 O 0.19 lbs/1000 gal 40CFR98 TblC HAPs lbs/10^12 Btu 1.3-8, FB02 Thickner Area Emergency Generator 1000 kw PM 0.20 g/kw-hr Tier Diesel 500 hrs/yr PM g/kw-hr Tier PM lbs/1000 gal Tier CO 3.50 g/kw-hr Tier SO g/kw-hr AP VOC 0.40 g/kw-hr Tier % CH g/kw-hr CO g/kw-hr N 2 O 0.01 g/kw-hr FB03 PLS Pond Area Emergency Generator 1000 kw PM 0.20 g/kw-hr Tier Diesel 500 hrs/yr PM g/kw-hr Tier PM lbs/1000 gal Tier CO 3.50 g/kw-hr Tier NO X 6.00 g/kw-hr Tier % SO g/kw-hr AP VOC 0.40 g/kw-hr Tier % CH g/kw-hr CO g/kw-hr N 2 O 0.01 g/kw-hr RCC-RCP Permit#55223 Page 7 of 11 AZRP01821

7 FB04 Main Substation Emergency Generator 750 kw PM 0.20 g/kw-hr Tier Diesel 500 hrs/yr PM g/kw-hr Tier PM lbs/1000 gal Tier CO 3.50 g/kw-hr Tier NO X 6.00 g/kw-hr Tier % SO g/kw-hr AP VOC 0.40 g/kw-hr Tier % FB05 Admnistration Buiding Emergency Generator 750 kw PM 0.20 g/kw-hr Tier CH g/kw-hr CO g/kw-hr N 2 O 0.01 g/kw-hr Diesel 500 hrs/yr PM g/kw-hr Tier PM lbs/1000 gal Tier CO 3.50 g/kw-hr Tier NO X 6.00 g/kw-hr Tier % SO g/kw-hr AP VOC 0.40 g/kw-hr Tier % FB06 EW Building Emergency Generator 50 kw PM 0.40 g/kw-hr Tier CH g/kw-hr CO g/kw-hr N 2 O 0.01 g/kw-hr Diesel 500 hrs/yr PM g/kw-hr Tier PM lbs/1000 gal Tier CO 5.00 g/kw-hr Tier NO X 4.43 g/kw-hr Tier % SO g/kw-hr AP VOC 0.37 g/kw-hr Tier % FB07 Primary Crusher Firewater Pump -400HP KW PM 0.20 g/kw-hr nsps CH 4 g/kw-hr CO 2 g/kw-hr N 2 O g/kw-hr Diesel 500 hrs/yr PM g/kw-hr PM g/kw-hr CO 3.50 g/kw-hr NO X 3.73 g/kw-hr 93.33% SO g/kw-hr VOC 0.27 g/kw-hr 6.67% CH CO N 2 O RCC-RCP Permit#55223 Page 8 of 11 AZRP01822

8 FB08 SX/EW Firewater Pump 400 HP KW PM 0.20 g/kw-hr nsps Diesel 500 hrs/yr PM g/kw-hr MISCELLANEOUS SOURCES PM g/kw-hr CO 3.50 g/kw-hr NO X 3.73 g/kw-hr 93.33% SO g/kw-hr VOC 0.27 g/kw-hr 6.67% MS01 Transfer of Lime to Lime Sorage Bin tons PM 0.61 lb/ton AP % 1.73 CH CO N 2 O PM lb/ton 47% 0.81 PM lb/ton 7.20% 0.12 MS02 Lime Storage Bin to Lime Transfer Screw C tons PM lb/ton AP % 0.00 U-6.21 mph, M - 1% PM lb/ton enclosed 0.00 PM lb/ton 0.00 MS03 Lime Tnsfr Screw Cnyr 1 & 2 to Slaker 1& tons PM lb/ton AP % 0.00 U-6.21 mph, M - 1% PM lb/ton enclosed 0.00 PM lb/ton 0.00 MS04 Lime Slaking in Lime Slakers 1 & tons PM 8.00 lb/ton AP % 2.27 PM lb/ton 2.27 Lime Slaker Scrubber PM lb/ton 2.27 MS05 Transfer of Sodium Metasilicate to storage bin 3000 tons PM lb/ton AP % U-6.21 mph, M - 1% PM lb/ton PM lb/ton MS06 Transfer of Flocculant to storage bin 1100 tons PM lb/ton AP % U-6.21 mph, M - 1% PM lb/ton PM lb/ton MS07 Transfer of Guar from Bags to Guar Feeder 150 tons PM lb/ton AP % U-6.21 mph, M - 1% PM lb/ton PM lb/ton MS08 Transfer of Granular Cobalt Sulfate from Bags 6 tons PM lb/ton AP % U-6.21 mph, M - 1% PM lb/ton PM lb/ton OTHER DUST COLLECTORS PCL01 Crusher Area Dust Collector (PC-CADC) 8760 hrs/yr PM lbs/hr PM/PM PM lbs/hr PM lbs/hr PM 2.5 /PM PCL02 Stockpile Area & Reclaim Tunnel DC 8760 hrs/yr PM lbs/hr PM/PM U-1.3 mph, M - 1% PM lbs/hr RCC-RCP Permit#55223 Page 9 of 11 AZRP01823

9 PM lbs/hr PM 2.5 /PM PCL03 Stockpile Feed Conveyor TP DC 8760 hrs/yr PM lbs/hr PM/PM U-6.21 mph, M - 1% PM lbs/hr PM lbs/hr PM 2.5 /PM PCL04 Pebble Crusher Area DC 8760 hrs/yr PM lbs/hr PM/PM U-6.21 mph, M - 1% PM lbs/hr PM lbs/hr PM 2.5 /PM PCL05 Copper Concentrate DC hrs/yr PM lbs/hr PM/PM U-6.21 mph, M - 1% PM lbs/hr PM lbs/hr PM 2.5 /PM PCL06 Copper Concentrate DC hrs/yr PM lbs/hr PM/PM % U-6.21 mph, M - 1% PM lbs/hr PM lbs/hr PM 2.5 /PM PCL07 Molybdenum Scrubber/ ESP 8760 hrs/yr PM lbs/hr PM/PM % 0.10 PM lbs/hr E-06 PM lbs/hr PM 2.5 /PM PCL08 Molybdenum DC 8760 hrs/yr PM lbs/hr PM/PM % 0.38 U-6.21 mph, M - 1% PM lbs/hr E-05 PM lbs/hr PM 2.5 /PM PCL09 Laboratory Dust Collector hrs/yr PM gr/dscf PM/PM % 2.56 U-6.21 mph, M - 1% PM gr/dscf PM gr/dscf PM 2.5 /PM PCL10 Laboratory Dust Collector hrs/yr PM gr/dscf PM/PM % 2.56 U-6.21 mph, M - 1% PM gr/dscf PM gr/dscf PM 2.5 /PM PCL11 Laboratory Dust Collector hrs/yr PM gr/dscf PM/PM % 2.56 U-6.21 mph, M - 1% PM gr/dscf PM gr/dscf PM 2.5 /PM PCL12 SAG Feed Conveyor DC 8760 hrs/yr PM gr/dscf PM/PM % 3.32 U-6.21 mph, M - 1% PM gr/dscf PM gr/dscf PM 2.5 /PM SOLVENT EXTRACTION AND ELECTROWINNING SXE01 4 Primary Mix Tanks (7.75'D x 9.75' H each) sq.ft VOC Secondary Mix Tnaks (9.5'D X 9.75' H each) 3 Tertiary Mix Tank (9.5'D x 9.75'H) each 4 Extraction Settlers (64'L x 33'W x 3.33'H each) SXE02 Electrowinning Commerical Cells 2640 sq.ft VOC 99% STORAGE TANKS T01 C7 Distribution Tank - Sodium Akylmonothiop gals/yr VOC lbs/hr T02 MIBC Storage Tanks -Methyl Isobutyl Carbino gals/yr VOC lbs/hr T03 Diesel Fuel Storage Tank gals/yr VOC lbs/hr RCC-RCP Permit#55223 Page 10 of 11 AZRP01824

10 T04 Diesel Fuel Storage Tank gals/yr VOC lbs/hr TOTAL FUGITIVES Fugitives TOTAL POINT SOURCE EMISSIONS Voluntary Limits on control equipment TOTAL EMISSIONS Year 1 Maximum values GHG All others are based on maximum values reached in Year 5 GHG Lead Calculations Concentration from Tetra Tech Report, 2007, whole rock analysis 80 mg/kg Gravimetric factor (convert converts formula weight of element to equivalent oxide) 1.08 conversion factor for mg/kg to lbs/ton Concentration from Tetra Tech Report, 2007, Tailings =80 x 1.08 x lbs/ton 10.4 mg/kg =10.4x1.08x RCC-RCP Permit#55223 Page 11 of 11 AZRP01825

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