# From: "Barbanell, Melissa (Sal t Lake City)" <mbarbanell@barrick.com>

To: Chuck French/RTP/USEPA/US@EPA

Cc: "Kevin Lewis" < klewis@airsci.com >

Date: 02/26/2010 07:30 PM

Subject: Goldstrike HCN emissions estimat e

Chuck,

I am sending you the HCN emissions estimate for Goldstrike for 2009.

You will note that emissions are estimated to be 3 tons per year. We will be getting you

estimates for the other mines as quickly as we can.

Thanks and feel free to call with any questions.

MelissaGOLDSTRIKE 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)3.0