From: "Barbanell, Melissa (Salt 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 estimate 

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. 

Melissa 
GOLDSTRIKE HCN EMISSIONS 93 days w/ 0.5+ in. 25% snow Wind: m/s 

2009 Surface Area and 2009 Solution Data 3.07 

Snow Cover Solution Parameters Overall

Adjustment Free CN- T kG or Flux 

Area Source Cat. Category Description Acres Acres pH g/m3 C pKa a0 H m/s or g/m2-s Fa*F

Tails North Tailings Impoundment TA Tails, Aqueous Surface 253 188.54 snow 8.60 1.10 9.41 9.655 0.9191 0.00310 1.57E-05 0.41 

TW Tails, Wet Sediment 162 120.72 snow 8.60 1.10 9.41 9.655 0.9191 0.00310 1.02E-05 0.41 

TD Tails, Dry Sediment 117 87.19 snow 2.33E-08 1.00 

Active Surface Subtotal 415.00

Inactive Tails AA Tailings Impoundment (inactive) TA Tails, Aqueous Surface 47 35.02 snow 8.37 0.012 9.41 9.655 0.9513 0.00310 1.57E-05 0.46 

TW Tails, Wet Sediment 14 10.43 snow 8.37 0.012 9.41 9.655 0.9513 0.00310 1.02E-05 0.46 

TD Tails, Dry Sediment 0 0.00 snow 2.33E-08 1.00 

Active Surface Subtotal 61.00

Roaster CIL Tank 1 TK Tanks 0.042 0.042 9.28 70.44 42.20 8.803 0.2521 0.01018 2.51E-04 0.69 

CIL Tank 2 TK Tanks 0.042 0.042 9.20 57.88 42.20 8.803 0.2870 0.01018 2.51E-04 0.69 

CIL Tank 3 TK Tanks 0.042 0.042 9.12 48.93 42.20 8.803 0.3247 0.01018 2.51E-04 0.69 

CIL Tank 4 TK Tanks 0.042 0.042 9.12 40.83 42.20 8.803 0.3247 0.01018 2.51E-04 0.69 

CIL Tank 5 TK Tanks 0.042 0.042 9.00 36.27 42.20 8.803 0.3861 0.01018 2.51E-04 0.69 

CIL Tank 6 TK Tanks 0.042 0.042 9.00 31.44 42.20 8.803 0.3861 0.01018 2.51E-04 0.69 

CN Destruct. Tank (Roaster) TK Tanks 0.042 0.042 9.00 31.44 42.20 8.803 0.3861 0.01018 2.51E-04 0.69 

Wet Mill CIL Train A Tank 0 TK Tanks 0.042 0.042 9.86 82.31 42.65 8.791 0.0792 0.01034 2.51E-04 0.69 

CIL Train A Tank 1 TK Tanks 0.042 0.042 9.86 82.31 42.65 8.791 0.0792 0.01034 2.51E-04 0.69 

CIL Train A Tank 2 TK Tanks 0.042 0.042 9.86 82.31 42.65 8.791 0.0792 0.01034 2.51E-04 0.69 

CIL Train A Tank 3 TK Tanks 0.020 0.020 9.86 82.31 42.65 8.791 0.0792 0.01034 2.51E-04 0.71 

CIL Train A Tank 4 TK Tanks 0.020 0.020 9.67 44.88 42.65 8.791 0.1178 0.01034 2.51E-04 0.71 

CIL Train A Tank 5 TK Tanks 0.020 0.020 9.67 44.88 42.65 8.791 0.1178 0.01034 2.51E-04 0.71 

CIL Train A Tank 6 TK Tanks 0.020 0.020 9.67 44.88 42.65 8.791 0.1178 0.01034 2.51E-04 0.71 

CIL Train A Tank 7 TK Tanks 0.042 0.042 9.67 44.88 42.65 8.791 0.1178 0.01034 2.51E-04 0.69 

CIL Train B Tank 0 TK Tanks 0.042 0.042 9.87 80.87 59.76 8.346 0.0292 0.01926 2.51E-04 0.69 

CIL Train B Tank 1 TK Tanks 0.042 0.042 9.87 80.87 59.76 8.346 0.0292 0.01926 2.51E-04 0.69 

CIL Train B Tank 2 TK Tanks 0.042 0.042 9.87 80.87 59.76 8.346 0.0292 0.01926 2.51E-04 0.69 

CIL Train B Tank 3 TK Tanks 0.020 0.020 9.87 80.87 59.76 8.346 0.0292 0.01926 2.51E-04 0.71 

CIL Train B Tank 4 TK Tanks 0.020 0.020 9.72 51.46 59.76 8.346 0.0408 0.01926 2.51E-04 0.71 

CIL Train B Tank 5 TK Tanks 0.020 0.020 9.72 51.46 59.76 8.346 0.0408 0.01926 2.51E-04 0.71 

CIL Train B Tank 6 TK Tanks 0.020 0.020 9.72 51.46 59.76 8.346 0.0408 0.01926 2.51E-04 0.71 

CIL Train B Tank 7 TK Tanks 0.042 0.042 9.72 51.46 59.76 8.346 0.0408 0.01926 2.51E-04 0.69 

CN Destruct. Tank (Autoclave) TK Tanks 0.042 0.042 9.69 48.17 51.20 8.569 0.0701 0.01411 2.51E-04 0.69 

Snow and Ice Adjustments Tsn Tails, Snow Covered 151.09 snow 1.17E-08 1.00 

Snow Covered Surface Subtotal 151.1

TOTAL AREA 593.82 593.82