# Tablke 1: Measured Flux Rates

Categor y Cat. HCN Flux (ug/m2-min)

Description ID CTZ GQ RM A verag e Description

Ponds/Channels CC 0.62 4 0.62 Channel Pregnant Covered

CO 25.38 2 28.88 4 5.08 5 19.78 Open Preg Channel, Tank, or Pond

BP 222.96 6 1155.65 5 712.57 7 697.06 Open Barren Ponds and Solution

Tails TA 42.62 6 15.39 4 0.96 4 19.66 Tails, Aqueous Surface

TW 6.46 5 5.50 4 1.80 10 4.59 Tails, Wet Sediment

TD 1.55 2 2.50 2 0.35 1 1.47 Tails, Dry Sediment

Active Pads PSW 21.92 13 48.64 20 43.25 25 37.94 Active Pad, Wet Surface

Psprink 72.98 2 265.85 3 169.41 Active Pad, Sprinkler, Wet Surface

PD 2.45 3 7.05 5 4.68 7 4.73 Active Pad, Dry Surface

Inactive Pads PI 0.78 16 1.95 Inactive Pad

PI1 2.22 3 Inactive Pad 1 mo

PI3 4.52 4 Inactive Pad 3 mo

PI12 0.41 2 1.82 3 Inactive Pad 12 mo

Tanks TK 574.50 8 212.12 12 847.97 6 544.87 Tanks

Ice/Snow Psn 0.92 5 1.74 2 1.33 Pad, Snow Covered

Tsn 0.80 2 0.54 1 0.67 Tails, Snow Covered

Bice 7.69 1 7.69 Barren Solution, Frozen

TAice 0.62 1 2.53 4 1.57 Tails, Aqueous, Frozen

Table 2: Measured Mass Tansfer Coefficients

Categor y Cat. kG (m/s)

Description ID CTZ GQ RM A verag e Description

Ponds/Channels CC 5.33E-07 4 5.33E-07 Channel Pregnant Covered

CO 4.35E-06 2 1.94E-04 4 5.17E-06 5 6.78E-05 Open Preg Channel, Tank, or Pond

BP 3.91E-05 6 1.70E-04 5 9.70E-05 7 1.02E-04 Open Barren Ponds and Solution

Tails TA 6.35E-05 6 2.43E-05 4 1.26E-06 4 2.97E-05 Tails, Aqueous Surface

TW 9.62E-06 5 1.13E-05 3 1.04E-05 Tails, Wet Sediment

TD 2.29E-06 2 2.29E-06 Tails, Dry Sediment

Active Pads PSW 7.11E-06 13 7.34E-06 20 3.06E-06 25 5.84E-06 Active Pad, Wet Surface

Psprink 2.70E-05 2 4.37E-05 3 3.53E-05 Active Pad, Sprinkler, Wet Surface

PD 7.05E-07 3 2.48E-06 1 6.61E-07 5 1.28E-06 Active Pad, Dry Surface

Inactive Pads PI Inactive Pad

PI1 Inactive Pad 1 mo

PI3 Inactive Pad 3 mo

PI12 Inactive Pad 12 mo

Tanks TK 2.27E-04 4 3.64E-04 12 1.29E-04 6 2.40E-04 Tanks

Ice/Snow Psn 2.02E-07 2 1.17E-07 1 1.60E-07 Pad, Snow Covered

Tsn Tails, Snow Covered

Bice 1.40E-06 1 1.40E-06 Barren Solution, Frozen

TAice 9.17E-07 1 9.17E-07 Tails, Aqueous, FrozenROUND MOUNTAIN HCN EMISSIONS66 days w/ 0.5+ in. 18% snow Wind: m/s Fw2008 Surface Area and 2008 Solution Data3.70 1.18Snow Cover Solution Parameters RMAdjustment Free CN- T kG or FluxArea Source Cat. Category DescriptionAcresAcres pH g/m3 C pKa a0 H m/s or g/m2-s Fa*Fw g/s lb/yrSouth Ded Pad South Ded Pad PSW Active Pad, Wet Surface 2.28 1.87 snow 11.31 116.07 10.84 9.618 0.0199 0.00326 3.06E-06 0.52 9.05E-05 6.3PD Active Pad, Dry Surface 85.30 69.87 snow7.81E-08 0.52 1.15E-02 799.8PI3 Inactive Pad 3 mo 0.00 0.00 snow7.53E-08 1.00 0.00E+00 0.0South Ded Pad Channels CO Open Preg Channel, Tank, or Pond 0.35 0.35 11.56 62.17 10.84 9.618 0.0114 0.00326 5.17E-06 0.52 8.77E-06 0.6CC Channel Pregnant Covered 0.09 0.09 11.56 62.17 10.84 9.618 0.0114 0.00326 5.33E-07 1.00 4.34E-07 0.0South Ded Pad Side Slopes-drips PSW Active Pad, Wet Surface 0.00 0.00 snow 11.31 116.07 10.84 9.618 0.0199 0.00326 3.06E-06 0.52 0.00E+00 0.0PD Active Pad, Dry Surface 0.00 0.00 snow7.81E-08 0.52 0.00E+00 0.0PI12 Inactive Pad 12 mo 81.56 66.81 snow3.03E-08 1.00 8.19E-03 569.5South Ded Pad Pond CO Open Preg Channel, Tank, or Pond 0.001 0.001 11.56 62.17 10.84 9.618 0.0114 0.00326 5.17E-06 0.52 3.74E-08 0.0Active Surface Subtotal 88.01West Ded Pad West Ded Pad Phases 1-5 PSW Active Pad, Wet Surface 3.10 2.54 snow 10.29 111.67 10.84 9.618 0.1757 0.00326 3.06E-06 0.49 9.75E-04 67.8PD Active Pad, Dry Surface 151.67 124.25 snow7.81E-08 0.49 1.91E-02 1,326.2PI3 Inactive Pad 3 mo 0.00 0.00 snow7.53E-08 1.00 0.00E+00 0.0West Ded Pad Channels---97.3% buried CO Open Preg Channel, Tank, or Pond 0.01 0.01 10.10 21.26 10.84 9.618 0.2472 0.00326 5.17E-06 0.49 2.02E-06 0.1CC Channel Pregnant Covered0.42 0.4210.10 21.26 10.84 9.618 0.2472 0.00326 5.33E-07 1.00 1.55E-05 1.1West Ded Pad Side Slopes-dripsPSW Active Pad, Wet Surface3.17 2.59 snow 10.29 111.67 10.84 9.618 0.1757 0.00326 3.06E-06 0.49 9.97E-04 69.3PD Active Pad, Dry Surface155.10 127.06 snow7.81E-08 0.49 1.95E-02 1,356.2PI12 Inactive Pad 12 mo0.00 0.00 snow3.03E-08 1.00 0.00E+00 0.0West Ded Pad P1 Pond---WDPadPh2 Feed CC Channel Pregnant Covered0.003 0.00310.25 109.12 10.84 9.618 0.1885 0.00326 5.33E-07 1.00 4.43E-07 0.0West Ded Pad P2 Pond---WestDedReturn CO Open Preg Channel, Tank, or Pond 0.003 0.00310.10 21.26 10.84 9.618 0.2472 0.00326 5.17E-06 0.49 5.41E-07 0.0West Ded Pad P3 Pond---WDPadPh3&4Feed CC Channel Pregnant Covered0.003 0.00310.26 104.03 10.84 9.618 0.1850 0.00326 5.33E-07 1.00 4.20E-07 0.0Active Surface Subtotal 313.47Reusable Pad Reusable Pad (South ADR Data)PSW Active Pad, Wet Surface2.14 1.75 snow 10.26 130.03 12.28 9.581 0.1730 0.00344 3.06E-06 0.54 9.02E-04 62.7PD Active Pad, Dry Surface47.66 39.04 snow7.81E-08 0.54 6.63E-03 460.9PI3 Inactive Pad 3 mo2.07 1.70 snow7.53E-08 1.00 5.18E-04 36.0Reusable Pad Channels (SADR data)CO Open Preg Channel, Tank, or Pond 0.36 0.3610.17 98.64 12.28 9.581 0.2052 0.00344 5.17E-06 0.54 2.80E-04 19.5Active Surface Subtotal 50.16ADRSADR Barren PondBP Open Barren Ponds and Solution 0.003 0.00310.26 130.03 12.28 9.581 0.1730 0.00344 9.70E-05 0.91 9.18E-05 6.4Active Surface Subtotal 0.003MillLeach Tank 1TK Tanks0.011 0.0110.22 359.00 24.80 9.255 0.0978 0.00541 1.29E-04 0.85 9.51E-04 66.1MillLeach Tank 2TK Tanks0.011 0.0110.22 359.00 24.80 9.255 0.0978 0.00541 1.29E-04 0.85 9.51E-04 66.1MillLeach Tank 3TK Tanks0.011 0.0110.22 359.00 24.80 9.255 0.0978 0.00541 1.29E-04 0.85 9.51E-04 66.1MillCIL Tank 1TK Tanks0.011 0.0110.22 359.00 24.80 9.255 0.0978 0.00541 1.29E-04 0.85 9.51E-04 66.1MillCIL Tank 2TK Tanks0.011 0.0110.22 359.00 24.80 9.255 0.0978 0.00541 1.29E-04 0.85 9.51E-04 66.1MillCIL Tank 3TK Tanks0.011 0.0110.22 359.00 24.80 9.255 0.0978 0.00541 1.29E-04 0.85 9.51E-04 66.1MillCIL Tank 4TK Tanks0.011 0.0110.22 359.00 24.80 9.255 0.0978 0.00541 1.29E-04 0.85 9.51E-04 66.1MillCIL Tank 5TK Tanks0.011 0.0110.22 359.00 24.80 9.255 0.0978 0.00541 1.29E-04 0.85 9.51E-04 66.1MillCIL Tank 6TK Tanks0.011 0.0110.22 359.00 24.80 9.255 0.0978 0.00541 1.29E-04 0.85 9.51E-04 66.1MillSouth Ded Pad CIC tanks (indoor)CO Open Preg Channel, Tank, or Pond 0.050 0.0511.56 62.17 10.84 9.618 0.0114 0.00326 5.17E-06 0.79 1.90E-06 0.1MillWest Ded Pad CIC tanks (indoor)CO Open Preg Channel, Tank, or Pond 0.050 0.0510.10 21.26 10.84 9.618 0.2472 0.00326 5.17E-06 0.79 1.41E-05 1.0MillReusable Ded Pad CIC tanks (indoor)CO Open Preg Channel, Tank, or Pond 0.050 0.0510.17 98.64 12.28 9.581 0.2052 0.00344 5.17E-06 0.79 5.72E-05 4.0TailsTailings ImpoundmentTA Tails, Aqueous Surface13.39 13.398.15 5.00 4.72 9.777 0.9772 0.00261 1.26E-06 0.54 4.68E-04 32.5TW Tails, Wet Sediment38.52 31.56 snow2.99E-08 0.54 2.05E-03 142.7TD Tails, Dry Sediment154.09 126.23 snow5.83E-09 1.00 2.98E-03 207.2Active Surface Subtotal 51.91Snow and Ice AdjustmentsPsn Pad, Snow Covered96.57 snow2.90E-08 1.00 1.13E-02 789.0Tsn Tails, Snow Covered34.83 snow8.97E-09 1.00 1.26E-03 87.9Snow Covered Surface Subtotal131.4TOTAL AREA741.54 741.54Total (lb/yr)6,642.0Total (ton/yr)3.3GOLD QUARRY HCN EMISSIONS26%snowWind:m/s Fw2008 Surface Area and 2008 Solution Data20.8%ice2.49 1.00Snow Cover Solution Parameters GQAdjustment Free CN- T kG or FluxArea Source Cat. Category DescriptionAcresAcres pH g/m3 C pKa a0 H m/s or g/m2-s Fa*Fw g/s lb/yrSAL Property Property Leach Pad PSW Active Pad, Wet Surface 13.11 9.66 snow 9.35 42.11 16.50 9.471 0.5691 0.00400 7.34E-06 0.47 1.29E-02 898.1PD Active Pad, Dry Surface 14.96 11.02 snow1.17E-07 0.47 2.46E-03 170.8PI1 Inactive Pad 1 mo 40.08 29.53 snow3.70E-08 1.00 4.42E-03 307.2PI12 Inactive Pad 12 mo 154.92 114.15 snow6.87E-09 1.00 3.18E-03 220.8P Leach Pad Preg. Pond CO Open Preg Channel, Tank, or Pond 2.18 2.182 8.71 1.48 16.70 9.466 0.8507 0.00403 1.94E-04 0.47 4.08E-03 283.6PLP Solution Transfer Channel CO Open Preg Channel, Tank, or Pond 0.31 0.312 8.71 1.48 16.70 9.466 0.8507 0.00403 1.94E-04 0.47 5.84E-04 40.6Barren Solution Handling (ponding) BP Open Barren Ponds and Solution 0.09 0.073 ice 9.42 42.11 16.50 9.471 0.5293 0.00400 1.70E-04 0.47 2.10E-03 146.1Active Surface Subtotal 30.66SAL Non-PropertNon-Property Leach PadPSW Active Pad, Wet Surface15.15 11.16 snow 9.35 42.11 16.50 9.471 0.5691 0.00400 7.34E-06 0.47 1.48E-02 1,029.2PD Active Pad, Dry Surface17.46 12.87 snow1.17E-07 0.47 2.85E-03 197.8PI1 Inactive Pad 1 mo45.63 33.62 snow3.70E-08 1.00 5.03E-03 349.8PI12 Inactive Pad 12 mo180.40 132.92 snow6.87E-09 1.00 3.70E-03 257.1NP Leach Pad Preg. PondsCO Open Preg Channel, Tank, or Pond 2.76 2.768.71 1.48 16.70 9.466 0.8507 0.00403 1.94E-04 0.47 5.12E-03 356.1Barren Solution Handling (ponding)BP Open Barren Ponds and Solution 0.11 0.09 ice 9.42 42.11 16.50 9.471 0.5293 0.00400 1.70E-04 0.47 2.43E-03 169.2Active Surface Subtotal 35.48CICCarbon Xfer Screens for LeachCO Open Preg Channel, Tank, or Pond 0.004 0.0048.71 1.48 16.70 9.466 0.8507 0.00403 1.94E-04 0.67 9.74E-06 0.7CIC Tanks for Leach OperationsCO Open Preg Channel, Tank, or Pond 0.043 0.0438.71 1.48 16.70 9.466 0.8507 0.00403 1.94E-04 0.67 1.14E-04 7.9Active Surface Subtotal 0.046Mills 5 and 6 CIL Tanks for Mill 5 CircuitTK Tanks0.29 0.2910.52 61.75 15.83 9.488 0.0851 0.00391 3.64E-04 0.61 5.25E-03 365.3CIC Tanks for Mill 5 CircuitTK Tanks0.02 0.0210.52 61.75 15.83 9.488 0.0851 0.00391 3.64E-04 0.70 4.22E-04 29.3Tails Screen for Mill 5 CircuitTK Tanks0.01 0.0110.52 61.75 15.83 9.488 0.0851 0.00391 3.64E-04 0.72 2.66E-04 18.5Mill 5 Thickener TankTA Tails, Aqueous Surface0.22 0.228.55 0.59 13.20 9.557 0.9113 0.00355 2.43E-05 0.62 2.52E-05 1.8Surge Tanks for Mill 5 CircuitTA Tails, Aqueous Surface0.09 0.098.55 0.59 13.20 9.557 0.9113 0.00355 2.43E-05 0.65 1.12E-05 0.8Flotation Thickener Tank(s)TA Tails, Aqueous Surface0.07 0.078.55 0.59 13.20 9.557 0.9113 0.00355 2.43E-05 0.66 8.33E-06 0.6CIL Tanks for Mill 6 CircuitTK Tanks0.23 0.2310.11 70.59 51.25 8.568 0.0279 0.01414 3.64E-04 0.61 5.73E-03 398.1CIP Tanks for Mill 6 CircuitTK Tanks0.01 0.0110.11 70.59 51.25 8.568 0.0279 0.01414 3.64E-04 0.75 1.78E-04 12.4Mill 6 Thickener TankTA Tails, Aqueous Surface0.13 0.139.10 0.59 24.98 9.251 0.5869 0.00545 2.43E-05 0.63 1.53E-05 1.1Mill 6 Quench TanksTA Tails, Aqueous Surface0.06 0.069.10 0.59 24.98 9.251 0.5869 0.00545 2.43E-05 0.66 7.08E-06 0.5Mill 6 NeutralizationTA Tails, Aqueous Surface0.05 0.059.10 0.59 24.98 9.251 0.5869 0.00545 2.43E-05 0.67 6.45E-06 0.4Mill 6 Quench PondTA Tails, Aqueous Surface1.08 1.089.10 0.59 24.98 9.251 0.5869 0.00545 2.43E-05 0.56 1.13E-04 7.9Spray Area (Quench Pond)TA Tails, Aqueous Surface1.72 1.729.10 0.59 24.98 9.251 0.5869 0.00545 2.43E-05 0.55 1.76E-04 12.2TailsMills 5/6 Tailings PondTA Tails, Aqueous Surface77.52 61.37 ice 8.55 0.59 13.20 9.557 0.9104 0.00355 2.43E-05 0.41 4.73E-03 328.5Mills 5/6 Tailings Pond Wet BeachTW Tails, Wet Sediment273.60 201.60 snow 8.75 1.40 21.18 9.349 0.7976 0.00475 1.13E-05 0.41 2.00E-02 1,389.6Mills 5/6 Tailings Pond Dry BeachTD Tails, Dry Sediment104.88 77.28 snow4.17E-08 1.00 1.30E-02 907.0Active Surface Subtotal 351.12Snow and Ice AdjustmentsPsn Pad, Snow Covered126.76 snow1.54E-08 1.00 7.88E-03 548.0Tsn Tails, Snow Covered99.60 snow1.34E-08 1.00 5.39E-03 374.7TAice Tails, Aqueous, Frozen16.15 ice4.21E-08 1.00 2.75E-03 191.4Bice Barren Solution, Frozen0.04 ice1.28E-07 1.00 2.16E-05 1.5Snow/Ice Covered Surface Subtotal242.6TOTAL AREA947.18 947.18Total (lb/yr)9,024.4Total (ton/yr)4.5CORTEZ HCN EMISSIONS66 days w/ 0.5+ in. 18% snow Wind: m/s FwNovember 3, 2009 Surface Area and 2008 Solution Parameters3.22 1.06Snow Cover Solution Parameters CTZAdjustment Free CN- T kG or FluxArea Source Cat. Category DescriptionAcresAcres pH g/m3 C pKa a0 H m/s or g/m2-s Fa*Fw g/s lb/yrArea 28 & Tails Area 28 Pad PSW Active Pad, Wet Surface 27.68 22.67 snow 10.00 62.11 14.50 9.523 0.2501 0.00372 7.11E-06 0.47 1.76E-02 1,223.3Impoundment PD Active Pad, Dry Surface 17.96 14.71 snow4.09E-08 0.47 1.14E-03 79.0PI Inactive Pad 104.41 85.53 snow1.30E-08 1.00 4.48E-03 311.7Area 28 Barren Pond BP Open Barren Ponds and Solution 0.0001 0.0001 10.00 7.70 11.30 9.606 0.2877 0.00332 3.91E-05 0.47 7.64E-08 0.0Area 28 Pregnant Pond CO Open Preg Channel, Tank, or Pond 0.002 0.002 10.00 7.70 11.30 9.606 0.2877 0.00332 4.35E-06 0.47 1.21E-07 0.0Area 28 CIC Tanks CO Open Preg Channel, Tank, or Pond 0.113 0.113 10.50 55.74 16.80 9.463 0.0841 0.00405 4.35E-06 0.47 1.76E-05 1.2Tailings Impoundment TA Tails, Aqueous Surface 15.63 12.80 snow 10.40 10.17 15.00 9.510 0.1141 0.00379 6.35E-05 0.47 6.75E-03 469.3TW Tails, Wet Sediment 29.95 24.53 snow1.08E-07 0.47 4.99E-03 346.9TD Tails, Dry Sediment 179.33 146.90 snow2.59E-08 1.00 1.54E-02 1,070.3Active Surface Subtotal 91.34Area 30 Area 30 Pad PSW Active Pad, Wet Surface 105.37 86.32 snow 10.10 65.56 14.50 9.523 0.2094 0.00372 7.11E-06 0.44 5.64E-02 3,919.1PD Active Pad, Dry Surface 117.43 96.20 snow4.09E-08 0.44 7.07E-03 491.9PI Inactive Pad 235.40 192.83 snow1.30E-08 1.00 1.01E-02 702.7Area 30 Barren Pond BP Open Barren Ponds and Solution 0.0002 0.0002 10.08 9.82 11.30 9.606 0.2514 0.00332 3.91E-05 0.44 1.13E-07 0.0Area 30 Pregnant Pond CO Open Preg Channel, Tank, or Pond 0.001 0.001 10.08 9.82 11.30 9.606 0.2514 0.00332 4.35E-06 0.44 3.43E-08 0.0Area 30 CIC Tanks CO Open Preg Channel, Tank, or Pond 0.019 0.019 10.50 55.74 16.80 9.463 0.0841 0.00405 4.35E-06 0.44 2.82E-06 0.2Active Surface Subtotal 222.82Mill Surge Tank TA Tails, Aqueous Surface 0.037 0.037 9.90 10.30 0.00 9.900 0.5000 0.00220 6.35E-05 0.72 7.62E-05 5.3Reclaim Water Tank TA Tails, Aqueous Surface 0.014 0.014 9.90 10.30 0.00 9.900 0.5000 0.00220 6.35E-05 0.76 3.11E-05 2.2Mixer Tank TK Tanks 0.014 0.014 11.00 166.00 24.20 9.271 0.0183 0.00530 2.27E-04 0.76 1.58E-04 11.0Thickener Tank TK Tanks 0.076 0.076 11.00 166.00 24.20 9.271 0.0183 0.00530 2.27E-04 0.69 7.76E-04 53.9CIL Tank 1 TK Tanks 0.057 0.057 11.00 166.00 24.20 9.271 0.0183 0.00530 2.27E-04 0.70 5.85E-04 40.7CIL Tank 2 TK Tanks 0.057 0.057 11.00 166.00 24.20 9.271 0.0183 0.00530 2.27E-04 0.70 5.85E-04 40.7CIL Tank 3 TK Tanks 0.057 0.057 11.00 166.00 24.20 9.271 0.0183 0.00530 2.27E-04 0.70 5.85E-04 40.7CIL Tank 4 TK Tanks 0.057 0.057 11.00 166.00 24.20 9.271 0.0183 0.00530 2.27E-04 0.70 5.85E-04 40.7CIL Tank 5 TK Tanks 0.057 0.057 10.50 72.00 24.20 9.271 0.0557 0.00530 2.27E-04 0.70 7.72E-04 53.7CIL Tank 6 TK Tanks 0.057 0.057 10.50 72.00 24.20 9.271 0.0557 0.00530 2.27E-04 0.70 7.72E-04 53.7CIL Tank 7 TK Tanks 0.057 0.057 10.50 72.00 24.20 9.271 0.0557 0.00530 2.27E-04 0.70 7.72E-04 53.7CIL Tank 8 TK Tanks 0.057 0.057 10.50 72.00 24.20 9.271 0.0557 0.00530 2.27E-04 0.70 7.72E-04 53.7Clarifier TK Tanks 0.076 0.076 10.35 65.00 21.67 9.337 0.0884 0.00483 2.27E-04 0.69 1.34E-03 93.0Clarifier TK Tanks 0.076 0.076 10.35 65.00 21.67 9.337 0.0884 0.00483 2.27E-04 0.69 1.34E-03 93.0Mill CIC TK Tanks 0.004 0.004 10.50 178.00 16.80 9.463 0.0841 0.00405 2.27E-04 0.81 1.71E-04 11.9Mill CICTK0 00410 50178 0016 809 4630 08410 004052 27E 040 811 71E 0411 9Mill CICTanks. 0.00410.50 178.00 16.80 9.463 0.0841 0.00405 2.27E-04 0.81 1.71E-04 11.9Mill CICTK Tanks0.004 0.00410.50 178.00 16.80 9.463 0.0841 0.00405 2.27E-04 0.81 1.71E-04 11.9Mill CICTK Tanks0.004 0.00410.50 178.00 16.80 9.463 0.0841 0.00405 2.27E-04 0.81 1.71E-04 11.9Mill CICTK Tanks0.004 0.00410.50 178.00 16.80 9.463 0.0841 0.00405 2.27E-04 0.81 1.71E-04 11.9AverageSnow and Ice AdjustmentsPsn Pad, Snow Covered109.98 snow2.22E-08 1.00 9.88E-03 687.0Tsn Tails, Snow Covered40.67 snow1.12E-08 1.00 1.84E-03 127.8Snow Covered Surface Subtotal150.7TOTAL AREA834.06 834.06Total (lb/yr)10,125.8Total (ton/yr)5.1GOLDSTRIKE HCN EMISSIONS93 days w/ 0.5+ in. 25% snow Wind: m/s Fw2009 Surface Area and 2009 Solution Data3.07 1.02Snow Cover Solution Parameters OverallAdjustment Free CN- TkGorFluxAnnualAreaSource Cat. Category DescriptionAcresAcrespH g/m3 C pKa a0 Hm/sorg/m2-sFa*Fw g/s lb/yrOperationTails North Tailings Impoundment TA Tails, Aqueous Surface 253 188.54 snow 8.60 1.10 9.41 9.655 0.9191 0.003101.57E-050.41 1.55E-02 1,080.5 100%TW Tails, Wet Sediment 162 120.72 snow 8.60 1.10 9.41 9.655 0.9191 0.003101.02E-050.41 6.45E-03 448.6 100%TD Tails, Dry Sediment 117 87.19 snow2.33E-081.00 8.21E-03 570.6 100%Active Surface Subtotal 415.00Inactive Tails AA Tailings Impoundment (inactive) TA Tails, Aqueous Surface 47 35.02 snow 8.37 0.012 9.41 9.655 0.9513 0.003101.57E-050.46 3.65E-05 2.5 100%TW Tails, Wet Sediment 14 10.43 snow 8.37 0.012 9.41 9.655 0.9513 0.003101.02E-050.46 7.05E-06 0.5 100%TD Tails, Dry Sediment 0 0.00 snow2.33E-081.00 0.00E+00 0.0 100%Active Surface Subtotal 61.00Roaster CIL Tank 1 TK Tanks 0.042 0.042 9.28 70.44 42.20 8.803 0.2521 0.010182.51E-040.69 5.24E-03 364.4 100%CIL Tank 2 TK Tanks 0.042 0.042 9.20 57.88 42.20 8.803 0.2870 0.010182.51E-040.69 4.90E-03 340.9 100%CIL Tank 3 TK Tanks 0.042 0.042 9.12 48.93 42.20 8.803 0.3247 0.010182.51E-040.69 4.69E-03 326.0 100%CIL Tank 4 TK Tanks 0.042 0.042 9.12 40.83 42.20 8.803 0.3247 0.010182.51E-040.69 3.91E-03 272.1 100%CIL Tank 5 TK Tanks 0.042 0.042 9.00 36.27 42.20 8.803 0.3861 0.010182.51E-040.69 4.13E-03 287.4 100%CIL Tank 6 TK Tanks 0.042 0.042 9.00 31.44 42.20 8.803 0.3861 0.010182.51E-040.69 3.58E-03 249.1 100%CN Destruct. Tank (Roaster) TK Tanks 0.042 0.042 9.00 31.44 42.20 8.803 0.3861 0.010182.51E-040.69 3.58E-03 249.1 100%Wet Mill CIL Train A Tank 0 TK Tanks 0.042 0.042 9.86 82.31 42.65 8.791 0.0792 0.010342.51E-040.69 1.96E-03 136.0 100%CIL Train A Tank 1 TK Tanks 0.042 0.042 9.86 82.31 42.65 8.791 0.0792 0.010342.51E-040.69 1.96E-03 136.0 100%CIL Train A Tank 2 TK Tanks 0.042 0.042 9.86 82.31 42.65 8.791 0.0792 0.010342.51E-040.69 1.96E-03 136.0 100%CIL Train A Tank 3 TK Tanks 0.020 0.020 9.86 82.31 42.65 8.791 0.0792 0.010342.51E-040.71 9.64E-04 67.0 100%CIL Train A Tank 4 TK Tanks 0.020 0.020 9.67 44.88 42.65 8.791 0.1178 0.010342.51E-040.71 7.81E-04 54.3 100%CIL Train A Tank 5 TK Tanks 0.020 0.020 9.67 44.88 42.65 8.791 0.1178 0.010342.51E-040.71 7.81E-04 54.3 100%CIL Train A Tank 6 TK Tanks 0.020 0.020 9.67 44.88 42.65 8.791 0.1178 0.010342.51E-040.71 7.81E-04 54.3 100%CIL Train A Tank 7 TK Tanks 0.042 0.042 9.67 44.88 42.65 8.791 0.1178 0.010342.51E-040.69 1.59E-03 110.2 100%CIL Train B Tank 0 TK Tanks 0.042 0.042 9.87 80.87 59.76 8.346 0.0292 0.019262.51E-040.69 1.32E-03 68.8 75%CIL Train B Tank 1 TK Tanks 0.042 0.042 9.87 80.87 59.76 8.346 0.0292 0.019262.51E-040.69 1.32E-03 68.8 75%CIL Train B Tank 2 TK Tanks 0.042 0.042 9.87 80.87 59.76 8.346 0.0292 0.019262.51E-040.69 1.32E-03 68.8 75%CIL Train B Tank 3 TK Tanks 0.020 0.020 9.87 80.87 59.76 8.346 0.0292 0.019262.51E-040.71 6.50E-04 33.9 75%CIL Train B Tank 4 TK Tanks 0.020 0.020 9.72 51.46 59.76 8.346 0.0408 0.019262.51E-040.71 5.78E-04 30.1 75%CIL Train B Tank 5 TK Tanks 0.020 0.020 9.72 51.46 59.76 8.346 0.0408 0.019262.51E-040.71 5.78E-04 30.1 75%CIL Train B Tank 6 TK Tanks 0.020 0.020 9.72 51.46 59.76 8.346 0.0408 0.019262.51E-040.71 5.78E-04 30.1 75%CIL Train B Tank 7 TK Tanks 0.042 0.042 9.72 51.46 59.76 8.346 0.0408 0.019262.51E-040.69 1.17E-03 61.1 75%CN Destruct. Tank (Autoclave) TK Tanks 0.042 0.042 9.69 48.17 51.20 8.569 0.0701 0.014112.51E-040.69 1.38E-03 96.0 100%Snow and Ice Adjustments Tsn Tails, Snow Covered 151.09 snow1.17E-081.00 7.16E-03 497.6Snow Covered Surface Subtotal 151.1TOTAL AREA593.82 593.82Total (lb/yr)5,925.4Total (ton/yr)3.0TWIN CREEKS HCN EMISSIONS79 days w/ 0.5+ in. 22% snow Wind: m/s Fw2008 Surface Area and 2008 Solution Data1.54 1.00Snow Cover Solution Parameters OverallAdjustment Free CN- TkGorFluxAnnualAreaSource Cat. Category DescriptionAcresAcrespH g/m3 C pKa a0 Hm/sorg/m2-sFa*Fw g/s lb/yrOperationTailings Sage / Juniper Tailings Impoundment TA Tails, Aqueous Surface 227.53 227.53 7.95 0.45 14.50 9.523 0.9740 0.003721.57E-050.41 9.72E-03 676.0 100%TW Tails, Wet Sediment 110.98 86.96 snow 7.98 1.23 19.25 9.400 0.9633 0.004421.02E-050.41 7.74E-03 538.2 100%TD Tails, Dry Sediment 258.96 202.91 snow2.33E-081.00 1.91E-02 1,327.9 100%Active Surface Subtotal 338.51Leach Pad Sonoma Leach Pad PSW Active Pad, Wet Surface 3.16 2.48 snow 9.28 102.85 9.00 9.666 0.7086 0.003055.00E-060.45 5.00E-03 347.4 100%PD Active Pad, Dry Surface 3.87 3.03 snow7.86E-080.45 4.32E-04 30.1 100%PI Inactive Pad 223.25 174.93 snow1.95E-081.00 1.38E-02 960.1 100%Izzenhood Leach Pad PSW Active Pad, Wet Surface 14.63 11.46 snow 9.84 116.00 9.00 9.666 0.4012 0.003055.00E-060.45 1.48E-02 1,025.7 100%PD Active Pad, Dry Surface 17.88 14.01 snow7.86E-080.45 2.00E-03 139.0 100%PI Inactive Pad 188.01 147.32 snow1.95E-081.00 1.16E-02 808.6 100%Osgood Leach Pad PSW Active Pad, Wet Surface 10.60 8.31 snow 9.84 116.00 9.00 9.666 0.4012 0.003055.00E-060.45 1.07E-02 743.2 100%PD Active Pad, Dry Surface 12.96 10.15 snow7.86E-080.45 1.45E-03 100.7 100%PI Inactive Pad 161.98 126.92 snow1.95E-081.00 1.00E-02 696.6 100%North Pregnant Pond CO Open Preg Channel, Tank, or Pond 0.416 0.42 9.21 1.62 9.00 9.666 0.7408 0.003051.87E-050.45 5.18E-05 3.6 100%South Pregnant Pond CO Open Preg Channel, Tank, or Pond 1.135 1.14 6.93 0.02 9.00 9.666 0.9982 0.003051.87E-050.45 1.77E-06 0.1 100%South Barren Pond CO Open Preg Channel, Tank, or Pond 1.135 1.14 9.57 0.02 9.00 9.666 0.5550 0.003051.87E-050.45 1.31E-06 0.1 100%N5 Pregnant Pond CO Open Preg Channel, Tank, or Pond 0.046 0.05 8.08 0.00 9.00 9.666 0.9747 0.003051.87E-050.45 0.00E+00 0.0 100%N5 Intermediate Pond CO Open Preg Channel, Tank, or Pond 1.033 1.03 9.28 0.00 9.00 9.666 0.7086 0.003051.87E-050.45 0.00E+00 0.0 100%North Intermediate Pond CO Open Preg Channel, Tank, or Pond 1.033 1.03 9.28 33.20 9.00 9.666 0.7086 0.003051.87E-050.45 2.52E-03 175.2 100%South Intermediate Pond CO Open Preg Channel, Tank, or Pond 1.033 1.03 9.49 33.20 9.00 9.666 0.5999 0.003051.87E-050.45 2.13E-03 148.3 100%North Area Carbon Screen CO Open Preg Channel, Tank, or Pond 0.001 0.00 9.20 2.32 9.00 9.666 0.7452 0.003051.87E-050.45 1.60E-07 0.0 100%South Area Carbon Screen CO Open Preg Channel, Tank, or Pond 0.0004 0.00 7.70 0.02 9.00 9.666 0.9893 0.003051.87E-050.45 8.87E-10 0.0 100%North Area CIC Tanks CO Open Preg Channel, Tank, or Pond 0.013 0.01 9.21 2.45 9.00 9.666 0.7408 0.003051.87E-050.45 2.45E-06 0.2 100%South Area CIC Tanks CO Open Preg Channel, Tank, or Pond 0.006 0.01 7.73 0.02 9.00 9.666 0.9885 0.003051.87E-050.45 1.53E-08 0.0 100%Active Surface Subtotal 68.95Mills Thickener Tank TK Tanks 0.721 0.721 9.47 0.45 40.60 8.844 0.1915 0.009602.51E-040.58 3.50E-04 24.3 100%Juniper/Sage CIL Tanks TK Tanks 0.341 0.341 9.47 58.00 40.60 8.844 0.1915 0.009602.51E-040.60 2.22E-02 1,545.3 100%Juniper/Sage Tails Screen TK Tanks 0.003 0.003 7.90 2.41 24.00 9.276 0.9596 0.005262.51E-040.78 2.88E-05 2.0 100%Snow and Ice Adjustments Tsn Tails, Snow Covered 80.07 snow1.17E-081.00 3.79E-03 263.7Psn Pad, Snow Covered 137.73 snow1.84E-081.00 1.03E-02 714.2Snow Covered Surface Subtotal 217.8TOTAL AREA1240.73 1240.73Total (lb/yr)10,270.5Total (ton/yr)5.1