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 07:27 PM                                                            

                                                                                             

  Subject:    TestData2010‐02‐26.xlsx                                                        

                                                                                             

Chuck,

I am attaching a spreadsheet which contains all the raw data that went into the

industry's analysis in order to arrive at emissions estimates for each of the

three mines that were tested.  To the extent that EPA needs to analyze or review

the industry's analysis, all of the necessary inputs are included in the

attached.

We are still working on the QA/QC process and it is possible that some of these

numbers may change slightly.  We do not anticipate that any such changes would

result in a noticeable change to the emissions estimates.

Our goal is to get you a more complete "report" some time next week.

This report will include all the field data sheets and other backup information.

I hope that this satisfies the needs of your management for the time being.  Feel

free to give me a call with any questions.

Melissa
2/26/2010 Version

Flux Box Data 

Sample HCN Conc. HCN Flux Sample HCN Flux Tem

Location ID ug/m3 ug/m2-min Mine Cat. ug/m2-m g/m2-s F CORTEZ Meas. Used Meas. UsedTailings Pond- Area #1, Wet Seds C-101 140 140 5.39 5.39 CTZ TW 5.385 8.97E-08 Tailings Pond- Area #1, Wet Seds C-102 74 74 2.85 2.85 CTZ TW 2.846 4.74E-08 Tailings Pond- Area #1, Dry Seds C-103 24 24 0.924 0.924 CTZ TD 0.923 1.54E-08 

Tailings Pond- Area #1, Dry Seds C-104 68 68 2.62 2.62 CTZ TD 2.615 4.36E-08 Tailings Pond- Area #2, Ice on Seds C-105 16 16 0.616 0.616 CTZ TAice 0.615 1.03E-08 

Tailings Pond- Area #2, Wet Seds C-106 84 84 3.23 3.23 CTZ TW 3.231 5.38E-08 Tailings Pond- Area #2, Wet Seds C-107 550 550 21.2 21.2 CTZ TW 21.154 3.53E-07 Tailings Pond- Area #2, Wet Seds C-108 280 280 10.8 10.8 CTZ TW 10.769 1.79E-07 Tailings Pond- Aqueous Surface C-109 820 820 31.6 31.6 CTZ TA 31.538 5.26E-07 Tailings Pond- Aqueous Surface C-110 940 940 36.2 36.2 CTZ TA 36.154 6.03E-07 Tailings Pond- Ice on Aqueous Surf C-111 1,100 1,100 42.4 42.4 CTZ TA 42.308 7.05E-07 Tailings Pond- Ice on Aqueous Surf C-112 1300 1300 50.1 50.1 CTZ TA 50.000 8.33E-07 Tailings Pond- Aqueous Surface C-113 1200 1200 46.2 46.2 CTZ TA 46.154 7.69E-07 Tailings Pond- Aqueous Surface C-114 1400 1400 53.9 53.9 CTZ TA 53.846 8.97E-07 Heap Leach- Rain Bird Irrigation, #1 C-115 1800 1800 69.3 69.3 CTZ Psprink 69.231 1.15E-06 Heap Leach- Rain Bird Irrigation, #2 C-116 2000 2000 77.0 77.0 CTZ Psprink 76.923 1.28E-06 Sample Replicate C-117 5000 192.5 192.5Media Blank C-118 <8.0 <0.308System Blank C-119 <9.6 <0.370Area #30- AH Leach, Area #1, Loc #1 C-201 3000 3000 116 116 CTZ PSW 115.385 1.92E-06 

Area #30- AH Leach, Area #1, Loc #2 C-202 250 250 9.63 9.63 CTZ PSW 9.615 1.60E-07 Area #30- AH Leach, Area #1, Loc #3 C-203 710 710 27.3 27.3 CTZ PSW 27.308 4.55E-07 Area #30- AH Leach, Area #1, Loc #4 C-204 250 250 9.63 9.63 CTZ PD 9.615 1.60E-07 Area #30- Inactive Leach, Area #2, Loc #1 C-205 38 38 1.46 CTZ PI 1.462 2.44E-08Area #30- Inactive Leach, Area #2, Loc #2 C-206 13 13 0.501 CTZ PI 0.500 8.33E-09

Area #30- Inactive Leach, Area #2, Loc #3 C-207 26 26 1.00 CTZ PI 1.000 1.67E-08Area #30- Inactive Leach, Area #2, Loc #4 C-208 33 33 1.27 CTZ PI 1.269 2.12E-08Area #30- AH Leach, Area #3, Loc #1 C-209 720 720 27.7 27.7 CTZ PSW 27.692 4.62E-07 Area #30- AH Leach Area #3, Loc #2 C-210 130 130 5.01 5.01 CTZ PD 5.000 8.33E-08 Area #30- AH Leach Area #3, Loc #3 C-211 2400 2400 92.4 92.4 CTZ BP 92.308 1.54E-06 Area #30- AH Leach Area #3, Loc #4 C-212 470 470 18.1 18.1 CTZ PSW 18.077 3.01E-07 Area #30- Inactive, Out of leach <30 days, Loc #1 C-213 <17 8.5 <0.655 CTZ PI 0.327 5.45E-09Area #30- Inactive, Out of leach <30 days, Loc #2 C-214 <16 8 <0.616 CTZ PI 0.308 5.13E-09Area #30- Inactive, Out of leach <30 days, Loc #3 C-215 23 23 0.886 CTZ PI 0.885 1.47E-08

Area #30- Inactive, Out of leach <30 days, Loc #4 C-216 <12 6 <0.462 CTZ PI 0.231 3.85E-09

Sample Replicate C-217 <13 <0.501

1
Flux Box Data 

Sample HCN Conc. HCN Flux Sample HCN Flux Tem

Location ID ug/m3 ug/m2-min Mine Cat. ug/m2-m g/m2-s F CORTEZ Meas. Used Meas. Used

Media Blank C-218 <7.9 <0.304Area #30- Inactive, Preped for Leach, Loc #1 C-301 26 26 1.00 CTZ PI 1.000 1.67E-08Area #30- Inactive, Preped for Leach, Loc #2 C-302 18 18 0.693 CTZ PI 0.692 1.15E-08

Area #30- Inactive, Preped for Leach, Loc #3 C-303 13 13 0.501 CTZ PI 0.500 8.33E-09

Area #30- Inactive, Preped for Leach, Loc #4 C-304 18 18 0.693 CTZ PI 0.692 1.15E-08

Area #30- Active Leach, Sloped, Loc #2 C-305 42 42 1.62 1.62 CTZ PSW 1.615 2.69E-08 Area #30- Active Leach, Sloped, Loc #1 C-306 680 680 26.2 26.2 CTZ BP 26.154 4.36E-07 Area #30- Active Leach, Sloped, Loc #3 C-307 1700 1700 65.5 65.5 CTZ PSW 65.385 1.09E-06 Area #30- Active Leach, Sloped, Loc #4 C-308 <16 8 <0.616 0.6 CTZ PD 0.308 5.13E-09 Area #30- Fresh Ore on Preped Heap, Loc #1 C-309 38 38 1.46 CTZ PI 1.462 2.44E-08Area #30- Fresh Ore on Preped Heap, Loc #2 C-310 37 37 1.42 CTZ PI 1.423 2.37E-08Area #30- Fresh Ore on Preped Heap, Loc #3 C-311 34 34 1.31 CTZ PI 1.308 2.18E-08Area #30- Fresh Ore on Preped Heap, Loc #4 C-312 37 37 1.42 CTZ PI 1.423 2.37E-08Area #28- AH Leach, Area #1, Loc #1 C-313 480 480 18.5 18.5 CTZ PSW 18.462 3.08E-07 Area #28- AH Leach, Area #1, Loc #2 C-314 1100 1100 42.4 42.4 CTZ PSW 42.308 7.05E-07 Area #28- AH Leach, Area #1, Loc #3 C-315 13000 13000 501 501 CTZ BP 500.000 8.33E-06 

Area #28- AH Leach,Area #1, Loc #4 C-316 430 430 16.6 16.6 CTZ PSW 16.538 2.76E-07 Area #28- AH Leach, Area #2, Loc #1 C-317 8600 8600 331 331 CTZ BP 330.769 5.51E-06 

Area #28- AH Leach, Area #2, Loc #2 C-318 850 850 32.7 32.7 CTZ PSW 32.692 5.45E-07 Area #28- AH Leach, Area #2, Loc #3 C-319 1000 1000 38.5 38.5 CTZ PSW 38.462 6.41E-07 Area #28- AH Leach, Area #2, Loc #4 C-320 270 270 10.4 10.4 CTZ PSW 10.385 1.73E-07 Sample Replicate C-321 280 10.78Media Blank C-322 <8.6 <0.331Area #30- Barren Pond, Sample #1 C-401 13000 13000 501 501 CTZ BP 500.000 8.33E-06 

Area #30- Barren Pond, Sample #2 C-402 16000 16000 616 616 CTZ BP 615.385 1.03E-05 

Area #30- Pregnant Pond, Sample #1 C-403 660 660 25.4 25.4 CTZ CO 25.385 4.23E-07 Area #30- Pregnant Pond, Sample #2 C-404 660 660 25.4 25.4 CTZ CO 25.385 4.23E-07 Sample Replicate C-405 670 25.795 25.795Clarifier Tank, Loc #1 C-406 22000 22000 847 847 CTZ TK 846.154 1.41E-05 

Clarifier Tank, Loc #2 C-407 22000 22000 847 847 CTZ TK 846.154 1.41E-05 

CIL Tank #8, Loc #1 C-408 7800 7800 300 300 CTZ TK 300.000 5.00E-06 

CIL Tank #8- Loc #2 C-409 7400 7400 285 285 CTZ TK 284.615 4.74E-06 

CIL Tank #1- Loc #2 C-410 24000 24000 924 924 CTZ TK 923.077 1.54E-05 

CIL Tank #1- Loc #1 C-411 28000 28000 1078 1078 CTZ TK 1076.923 1.79E-05 

Thicken Tank- Loc #1 C-412 11000 11000 424 424 CTZ TK 423.077 7.05E-06 

Thicken Tank- Loc #2 C-413 12000 12000 462 462 CTZ TK 461.538 7.69E-06 

2
Flux Box Data 

Sample HCN Conc. HCN Flux Sample HCN Flux Tem

Location ID ug/m3 ug/m2-min Mine Cat. ug/m2-m g/m2-s F CORTEZ Meas. Used Meas. Used

Media Blank C-414 <15 <0.578GOLD QUARRYTailings Pond- Dry Seds, Loc #1, Snow N-101 15 15 0.58 0.58 GQ Tsn 0.577 9.62E-09Tailings Pond- Dry Seds, Loc #2, Snow Removed N-102 55 55 2.1 2.1 GQ TD 2.115 3.53E-08

Tailings Pond- Dry Seds, Loc #3, Snow N-103 29 29 1.1 1.1 GQ Tsn 1.115 1.86E-08

Tailings Pond- Dry Seds, Loc #4, Snow Removed N-104 77 77 3.0 3.0 GQ TD 2.962 4.94E-08

Tailings Pond- Ice on Aqueous Surf, Loc #1 N-105 180 180 6.9 6.9 GQ TAice 6.923 1.15E-07

Tailings Pond- Ice on Aqueous Surf, Loc #2 N-106 69 69 2.7 2.7 GQ TAice 2.654 4.42E-08

Tailings Pond- Ice on Aqueous Surf, Loc #3 N-107 15 15 0.58 0.58 GQ TAice 0.577 9.62E-09Tailings Pond- Ice on Aqueous Surf, Loc #4 N-108 100 100 3.9 3.9 GQ TAice 3.846 6.41E-08

Sample Replicate N-109 99 3.8115Media Blank N-110 <11 <0.42System Blank N-111 <3.1 <0.12Tailings Pond, Area 3, Wet Seds, Ice on Seds N-201 63 63 2.4 2.4 GQ TW 2.423 4.04E-08

Tailings Pond, Area 3, Wet Seds, Liq Film on Seds N-202 260 260 10 10 GQ TW 10.000 1.67E-07 3Tailings Pond, Area 3, Wet Seds, Loc #3 N-203 170 170 6.5 6.5 GQ TW 6.538 1.09E-07 

Tailings Pond, Area 3, Wet Seds, Loc #4 N-204 150 150 5.8 5.8 GQ TW 5.769 9.62E-08 

Tailings Pond, Area 4, Liquid Surf, End of Barge N-205 480 480 18 18 GQ TA 18.462 3.08E-07 Tailings Pond, Area 4, Liquid Surf, End of Pier N-206 400 400 15 15 GQ TA 15.385 2.56E-07 Tailings Pond, Area 4, Liquid Surf, Mid Way of Pier N-207 290 290 11 11 GQ TA 11.154 1.86E-07 Tailings Pond, Area 4, Liquid Surf, Near Shore N-208 460 460 18 18 GQ TA 17.692 2.95E-07 Heap Leach, D Lift/Phase 6, Area 1, Loc 1 N-209 1500 1500 58 58 GQ PSW 57.692 9.62E-07 Heap Leach, D Lift/Phase 6, Area 1, Loc 2 N-210 550 550 21 21 GQ PSW 21.154 3.53E-07 Heap Leach, D Lift/Phase 6, Area 1, Loc 3 N-211 <28 14 <1.1 0.550 GQ Psn 0.538 8.97E-09 Heap Leach, D Lift/Phase 6, Area 1, Loc 4 N-212 1300 1300 50 50 GQ PSW 50.000 8.33E-07 Heap Leach, D Lift/Phase 6, Area 2, Loc 1 N-213 620 620 24 24 GQ PSW 23.846 3.97E-07 Heap Leach, D Lift/Phase 6, Area 2, Loc 2 N-214 5500 5500 212 212 GQ BP 211.538 3.53E-06 

Heap Leach, D Lift/Phase 6, Area 2, Loc 3 N-215 790 790 30 30 GQ PSW 30.385 5.06E-07 Heap Leach, D Lift/Phase 6, Area 2, Loc 4 N-216 1200 1200 46 46 GQ PSW 46.154 7.69E-07 Heap Leach, D Lift/Phase 6, Area 3, Loc 1 N-217 400 400 15 15 GQ PSW 15.385 2.56E-07 Heap Leach, D Lift/Phase 6, Area 3, Loc 2 N-218 540 540 21 21 GQ PSW 20.769 3.46E-07 Heap Leach, D Lift/Phase 6, Area 3, Loc 3 N-219 55000 55000 2118 2118 GQ BP 2115.385 3.53E-05 

Heap Leach, D Lift/Phase 6, Area 3, Loc 4 N-220 710 710 27 27 GQ PSW 27.308 4.55E-07 Sample Replicate N-221 660 25.41Media Blank N-222 <12 <0.46

3
Flux Box Data 

Sample HCN Conc. HCN Flux Sample HCN Flux Tem

Location ID ug/m3 ug/m2-min Mine Cat. ug/m2-m g/m2-s F CORTEZ Meas. Used Meas. Used

Wobbler Irrigation, Phase 3, Loc 1 N-301 200 200 7.7 7.7 GQ Bice 7.692 1.28E-07 

Wobbler Irrigation, Phase 3, Loc 2 N-302 4300 4300 166 166 GQ Psprink 165.385 2.76E-06 

Wobbler Irrigation, Phase 3, Loc 3 N-303 6400 6400 246 246 GQ Psprink 246.154 4.10E-06 

Wobbler Irrigation, Phase 3, Loc 4 N-304 12000 12000 462 462 GQ Psprink 461.538 7.69E-06 

Heap Leach, D Lift/Phase 7, Area 2, Loc 1 N-305 64000 64000 2464 2464 GQ BP 2461.538 4.10E-05 

Heap Leach, D Lift/Phase 7, Area 2, Loc 2 N-306 2100 2100 81 81 GQ PSW 80.769 1.35E-06 Heap Leach, D Lift/Phase 7, Area 2, Loc 3 N-307 3400 3400 131 131 GQ PSW 130.769 2.18E-06 

Heap Leach, D Lift/Phase 7, Area 2, Loc 4 N-308 380 380 15 15 GQ PSW 14.615 2.44E-07 Heap Leach, Phase 6, Cell 7, Inactive 2 Weeks, Loc 1 N-309 39 39 1.5 1.5 GQ Psn 1.500 2.50E-08

Heap Leach, Phase 6, Cell 7, Inactive 2 Weeks, Loc 2 N-310 41 41 1.6 1.6 GQ PI1 1.577 2.63E-08

Heap Leach, Phase 6, Cell 7, Inactive 2 Weeks, Loc 3 N-311 120 120 4.6 4.6 GQ PI1 4.615 7.69E-08

Heap Leach, Phase 6, Cell 7, Inactive 2 Weeks, Loc 4 N-312 39 39 1.5 1.5 GQ PI1 1.500 2.50E-08

Heap Leach, North of K Lift, Inacitve Over 1 Year, Loc 1 N-313 15 15 0.58 0.58 GQ Psn 0.577 9.62E-09Heap Leach, North of K Lift, Inactive Over 1 Year, Loc 2 N-314 <10 5 <0.39 0.39 GQ PI12 0.192 3.21E-09Heap Leach, North of K Lift, Inactive Over 1 Year, Loc 3 N-315 14 14 0.54 0.54 GQ Psn 0.538 8.97E-09Heap Leach, North of K Lift. Inactive Over 1 Year, Loc 4 N-316 23 23 0.89 0.89 GQ PI12 0.885 1.47E-08Heap Leach, Phase 6, Side Slope, Loc 1 N-317 69 69 2.7 2.7 GQ Psn 2.654 4.42E-08 

Heap Leach, Phase 6, Side Slope, Loc 2 N-318 4100 4100 158 158 GQ PSW 157.692 2.63E-06 

Heap Leach, Phase 6, Side Slope, Loc 3 N-320 9600 9600 370 370 GQ PSW 369.231 6.15E-06 

Heap Leach, Phase 6, Side Slope, Loc 4 N-319 2600 2600 100 100 GQ PSW 100.000 1.67E-06 

Sample Replicate N-321 8600 331.1Media Blank N-322 <9.4 <0.36Pregnant Solution Channel, Turbulent Surface, Loc 1 N-401 900 900 35 35 GQ CO 34.615 5.77E-07 Pregnant Solution Channel, Turbulent Surface, Loc 2 N-402 890 890 34 34 GQ CO 34.231 5.71E-07 Pregnant Solution Channel, Quiescent Surface, Loc 1 N-403 620 620 24 24 GQ CO 23.846 3.97E-07 Pregnant Solution Channel, Quiescent Surface, Loc 2 N-404 640 640 25 25 GQ CO 24.615 4.10E-07 Heap Leach, Cell 34, Inactive 7 Months, Loc 1 N-405 140 140 5.4 5.4 GQ PD 5.385 8.97E-08

Heap Leach, Cell 34, Inactive 7 Months, Loc 2 N-406 150 150 5.8 5.8 GQ PD 5.769 9.62E-08

Heap Leach, Cell 34, Inactive 7 Months, Loc 3 N-407 240 240 9.2 9.2 GQ PD 9.231 1.54E-07

Heap Leach, Cell 34, Inactive 7 Months, Loc 4 N-408 100 100 3.9 3.9 GQ PD 3.846 6.41E-08

Heap Leach, N of Cell B03, Phase 7, Active, Loc 1 N-409 2700 2700 104 104 GQ PSW 103.846 1.73E-06 

Heap Leach, N of Cell B03, Phase 7, Active, Loc 2 N-410 410 410 16 16 GQ PD 15.769 2.63E-07 Heap Leach, N of Cell B03, Phase 7, Active, Loc 3 N-411 1200 1200 46 46 GQ PSW 46.154 7.69E-07 Heap Leach, N of Cell B03, Phase 7, Active, Loc 4 N-412 300 300 12 12 GQ PSW 11.538 1.92E-07 Heap Leach, E of Cell 47, High Grade Ore, Loc 1 N-413 3000 3000 116 116 GQ PSW 115.385 1.92E-06 

Heap Leach, E of Cell 47, High Grade Ore, Loc 2 N-414 1400 1400 54 54 GQ PSW 53.846 8.97E-07 

Heap Leach, E of Cell 47, High Grade Ore, Loc 3 N-415 23000 23000 886 886 GQ BP 884.615 1.47E-05 

4
Flux Box Data 

Sample HCN Conc. HCN Flux Sample HCN Flux Tem

Location ID ug/m3 ug/m2-min Mine Cat. ug/m2-m g/m2-s F CORTEZ Meas. Used Meas. Used

Heap Leach, E of Cell 47, High Grade Ore, Loc 4 N-416 55000 55000 2118 2118 GQ BP 2115.385 3.53E-05 

Sample Replicate N-417 50000 1925Media Blank N-418 <7.7 <0.30Mill 5, CIL Tank #7, Loc 1 N-501 2600 2600 100 100 GQ TK 100.000 1.67E-06 

Sample Repliate N-502 2600 100.1 Mill 5, CIL Tank #7, Loc 2 N-503 2600 2600 100 100 GQ TK 100.000 1.67E-06 

Sample Repliate N-504 2800 107.8 Mill 5, Tank #40, Loc 1 N-505 3600 3600 139 139 GQ TK 138.462 2.31E-06 

Mill 5, Tank #40, Loc 2 N-506 2600 2600 100 100 GQ TK 100.000 1.67E-06 

Mill 6, CIL Tank #10, Loc 1 N-507 9100 9100 350 350 GQ TK 350.000 5.83E-06 1

Mill 6, CIL Tank #10, Loc 2 N-508 9300 9300 358 358 GQ TK 357.692 5.96E-06 1

Mill 6, CIL Tank #6, Loc 1 N-509 9200 9200 354 354 GQ TK 353.846 5.90E-06 1

Mill 6, CIL Tank #6, Loc 2 N-510 8600 8600 331 331 GQ TK 330.769 5.51E-06 1

Mill 6, CIL Tank #1, Loc 1 N-511 5800 5800 223 223 GQ TK 223.077 3.72E-06 1

Mill 6, CIL Tank #1, Loc 2 N-512 6000 6000 231 231 GQ TK 230.769 3.85E-06 1

Mill 6, CIL Tank #4, Loc 1 N-513 7900 7900 304 304 GQ TK 303.846 5.06E-06 1

Mill 6, CIL Tank #4, Loc 2 N-514 6800 6800 262 262 GQ TK 261.538 4.36E-06 1

Media Blank N-515 <44 <1.7ROUND MOUNTAINPregnant Solution Channel- Rock Covered, Loc #1 R-101 16 16 0.62 0.62 RM CC 0.615 1.03E-08 Pregnant Solution Channel- Rock Covered, Loc #2 R-102 <11 5.5 <0.42 0.4 RM CC 0.212 3.53E-09 Pregnant Solution Channel- Turbulent, Loc #1 R-103 <16 8 <0.62 0.6 RM CO 0.308 5.13E-09 Pregnant Solution Channel- Turbulent, Loc #2 R-104 <15 7.5 <0.58 0.6 RM CO 0.288 4.81E-09 Tails Pond Aqueous Source, Loc #1 R-105 <13 6.5 <0.50 0.5 RM TA 0.250 4.17E-09 Tails Pond Aqueous Source, Loc #2 R-106 <16 8 <0.62 0.6 RM TA 0.308 5.13E-09 Sample Replicate R-107 <15 <0.58Media Blank R-108 <7.7 <0.30Reusable Pad, Buried Emitters, Flat, Dry, Location 1 R-201 380 380 15 15 RM PSW 14.615 2.44E-07 Reusable Pad, Buried Emitters, Flat, Ponded, Location 2 R-202 18,000 18,000 693 693 RM BP 692.308 1.15E-05 

Reusable Pad, Buried Emitters, Flat, Wet Rock/Soil, Loc 3 R-203 540 540 21 21 RM PSW 20.769 3.46E-07 Reusable Pad, Buried Emitters, Flat, Wet Rock/Soil, Loc 4 R-204 470 470 18 18 RM PSW 18.077 3.01E-07 Reusable Pad, Surface Emitters, Sloped, Over Emitter, Loc 1 R-205 9,900 9,900 381 381 RM PSW 380.769 6.35E-06 

Reusable Pad, Surface Emitters, Sloped, Wet Surface, Loc 2 R-206 1,900 1,900 73 73 RM PSW 73.077 1.22E-06 Resuable Pad, Surface Emitters, Sloped, Dry Surface, Loc 3 R-207 620 620 24 24 RM PSW 23.846 3.97E-07 Resuable Pad, Surface Emitters, Sloped, Wet Surface, Loc 4 R-208 11,000 11,000 424 424 RM PSW 423.077 7.05E-06 

South Heap, NE Corner Lift #10, Area #1, Surf Emitters, Loc 1 R-209 16,000 16,000 616 616 RM PSW 615.385 1.03E-05 

South Heap, NE Corner Lift #10, Area #1, Surf Emitters, Loc 2 R-210 280 280 11 11 RM PSW 10.769 1.79E-07 South Heap, NE Corner Lift #10, Area #1, Surf Emitters, Loc 3 R-211 510 510 20 20 RM PSW 19.615 3.27E-07 South Heap, NE Corner Lift #10, Area #1, Surf Emitters, Loc 4 R-212 840 840 32 32 RM PSW 32.308 5.38E-07 South Heap, NW Lift #10, Slope, Area #2, Surf Emitters, Loc 1 R-213 200 200 7.7 7.7 RM PD 7.692 1.28E-07 

5
Flux Box Data 

Sample HCN Conc. HCN Flux Sample HCN Flux Tem

Location ID ug/m3 ug/m2-min Mine Cat. ug/m2-m g/m2-s F CORTEZ Meas. Used Meas. Used

South Heap, NW Lift #10, Slope, Area #2, Surf Emitters, Loc 2 R-214 13,000 13,000 501 501 RM PSW 500.000 8.33E-06 

South Heap, NW Lift #10, Slope, Area #2, Surf Emitters, Loc 3 R-215 980 980 38 38 RM PSW 37.692 6.28E-07 South Heap, NW Lift #10, Slope, Area #2, Surf Emitters, Loc 4 R-216 2,200 2,200 85 85 RM PSW 84.615 1.41E-06 South Heap, NW Lift #10, Slope, Area #2, Ice in Shade, Loc 1 R-217 810 810 31 31 RM PSW 31.154 5.19E-07 South Heap, NW Lift #10, Slope, Area #2, Ice in Sun, Loc 2 R-218 470 470 18 18 RM PSW 18.077 3.01E-07 South Heap, NW Lift #10, Flat, Area #3, Snow on Heap, Loc 3 R-219 57 57 2.2 2.2 RM Psn 2.192 3.65E-08 

South Heap, NW Lift #10, Flat, Area #3, Wet Surf Near Snow, Loc 3 R-220 170 170 6.5 6.5 RM PSW 6.538 1.09E-07 

Sample Replicate R-221 180 6.93Media Blank R-222 <4.6 <0.18System Blank R-223 6.3 0.24255Tailings Pond, Wet Sediments, Area #1, Loc 1, Wet Slurry R-301 60 60 2.3 2.3 RM TW 2.308 3.85E-08

Tailings Pond, Wet Sediments, Area #1, Loc 2, Wet Slurry R-302 78 78 3.0 3.0 RM TW 3.000 5.00E-08

Tailings Pond, Ice on Wet Sediments, Area #1, Ice, Loc 3 R-303 23 23 0.89 0.89 RM TW 0.885 1.47E-08Tailings Pond, Ice on Wet Sediments, Area #1, Ice, Loc 4 R-304 43 43 1.7 1.7 RM TW 1.654 2.76E-08

Tailings Pond, Wet Sediments, Area #2, Loc 1, Wet Slurry R-305 140 140 5.4 5.4 RM TW 5.385 8.97E-08

Tailings Pond, Wet Sediments, Area #2, Loc 2, Wet Slurry R-306 64 64 2.5 2.5 RM TW 2.462 4.10E-08

Tailings Pond, Wet Sediments, Area #2, Loc 3, Wet Slurry R-307 59 59 2.3 2.3 RM TW 2.269 3.78E-08

Tailings Pond, Wet Sediments, Area #2, Loc 4, Wet Slurry R-308 55 55 2.1 2.1 RM TW 2.115 3.53E-08

Tailings Pond, Dry Sediments, Area #3, Loc 1, Moist Dry Seds R-309 23 23 0.89 0.89 RM TW 0.885 1.47E-08Tailings Pond, Dry Sediments, Area #3, Loc 2, Moist Dry Seds R-310 16 16 0.62 0.62 RM TW 0.615 1.03E-08Tailings Pond, Dry Sediments, Area #3, Loc 3, Dry Sediments R-311 9.1 9.1 0.35 0.35 RM TD 0.350 5.83E-09Tailings Pond, Snow on Dry Sediments, Area #3, Loc 4, Snow R-312 14 14 0.54 0.54 RM Tsn 0.538 8.97E-09South Heap, Inactive >1 yr, NE Lift 10, Location 1 R-313 36 36 1.4 1.4 RM Psn 1.385 2.31E-08

South Heap, Inactive >1 yr, NE Lift 10, Location 2 R-314 66 66 2.5 2.5 RM PI12 2.538 4.23E-08

South Heap, Inactive >1 yr, NE Lift 10, Location 3 R-315 41 41 1.6 1.6 RM PI12 1.577 2.63E-08

South Heap, Inactive >1 yr, NE Lift 10, Location 4 R-316 39 39 1.5 1.5 RM PI12 1.500 2.50E-08

South Heap, Inactive <3 months, NE Lift 10, Sloped, Location 1 R-317 190 190 7.3 7.3 RM PI3 7.308 1.22E-07

South Heap, Inactive <3 months, NE Lift 10, Sloped, Location 2 R-318 110 110 4.2 4.2 RM PI3 4.231 7.05E-08

South Heap, Inactive <3 months, NE Lift 10, Sloped, Location 3 R-319 91 91 3.5 3.5 RM PI3 3.500 5.83E-08

South Heap, Inactive <3 months, NE Lift 10, Sloped, Location 4 R-320 100 100 3.9 3.9 RM PI3 3.846 6.41E-08

Sample Replicate R-321 110 4.235Media Blank R-322 <7.7 <0.30South Exten Pad, 1 Week, Area 1, Location 1, Subsurf Emit, Dry R-401 150 150 5.8 5.8 RM PD 5.769 9.62E-08 

South Exten Pad, 1 Week, Area 1, Location 2, Subsurf Emit, Moist R-402 84 84 3.2 3.2 RM PSW 3.231 5.38E-08 

South Exten Pad, 1 Week, Area 1, Location 3, Subsurf Emit, Dry R-403 88 88 3.4 3.4 RM PD 3.385 5.64E-08 

South Exten Pad, 1 Week, Area 1, Location 4, Subsurf Emit, Moist R-404 400 400 15 15 RM PSW 15.385 2.56E-07 West Heap, Active, Phase 2, Area 1, Subsurf Emit, Loc1, Dry Ridge R-405 230 230 8.9 8.9 RM PD 8.846 1.47E-07 

West Heap, Active, Phase 2, Area 1, Subsurf Emit, Loc 2, Wet R-406 400 400 15 15 RM PSW 15.385 2.56E-07 

West Heap, Active, Phase 2, Area 1, Subsurf Emit, Loc 3, Damp R-407 480 480 18 18 RM PSW 18.462 3.08E-07 West Heap, Active, Phase 2, Area 1, Subsurf Emit, Loc 4, Liquid R-408 26,000 26,000 1001 1001 RM BP 1000.000 1.67E-05 

West Heap, Active, Sloped, Surf Emit, Area 2, Loc 1, Typical Moist R-409 3,200 3,200 123 123 RM PSW 123.077 2.05E-06 

West Heap, Active, Sloped, Surf Emit, Area 2, Loc 2, Typical Moist R-410 4,000 4,000 154 154 RM PSW 153.846 2.56E-06 

West Heap, Active, Sloped, Surf Emit, Area 2, Loc 3, Dry R-411 6,200 6,200 239 239 RM PSW 238.462 3.97E-06 

West Heap, Active, Sloped, Surf Emit, Area 2, Loc 4, Wet R-412 21,000 21,000 809 809 RM BP 807.692 1.35E-05 

West Heap, Active, Surf Emit, Area 3, Loc 1, Dry R-413 120 120 4.6 4.6 RM PD 4.615 7.69E-08 

West Heap, Active, Surf Emit, Area 3, Loc 2, Moist R-414 850 850 33 33 RM PSW 32.692 5.45E-07 West Heap, Active, Surf Emit, Area 3, Loc 3, Over Emitter R-415 15,000 15,000 578 578 RM BP 576.923 9.62E-06 

6
Flux Box Data 

Sample HCN Conc. HCN Flux Sample HCN Flux Tem

Location ID ug/m3 ug/m2-min Mine Cat. ug/m2-m g/m2-s F CORTEZ Meas. Used Meas. Used

West Heap, Active, Surf Emit, Area 3, Loc 4, Pooled R-416 11,000 11,000 424 424 RM BP 423.077 7.05E-06 

West Heap, Active, Surf Emit, Area 4, Loc 1, Dry R-417 69 69 2.7 2.7 RM PD 2.654 4.42E-08 

West Heap, Active, Surf Emit, Area 4, Loc 2, Dry R-418 79 79 3.0 3.0 RM PD 3.038 5.06E-08 

Sample Replicate R-419 67 2.6Barren Tank at ADR, Mildly Turbulent, Location 1 R-420 22,000 22,000 847 847 RM BP 846.154 1.41E-05 

Barren Tank at ADR, Mildly Turbulent, Location 2 R-421 21,000 21,000 809 809 RM BP 807.692 1.35E-05 

Pregnant Tank at ADR, Mildly Turbulent, Location 1 R-422 1,600 1,600 62 62 RM CO 61.538 1.03E-06 Pregnant Tank at ADR, Mildly Turbulent, Location 2 R-423 1,500 1,500 58 58 RM CO 57.692 9.62E-07 Media Blank R-424 <7.0 <0.27CIL Tank #6, Location 1 R-501 3,800 3,800 146 146 RM TK 146.154 2.44E-06 

CIL Tank #6, Location 2 R-502 3,300 3,300 127 127 RM TK 126.923 2.12E-06 

CIL Tank #1, Location 1 R-503 43,000 43,000 1656 1656 RM TK 1653.846 2.76E-05 

CIL Tank #1, Location 2 R-504 52,000 52,000 2002 2002 RM TK 2000.000 3.33E-05 

Leach Tank #1, Location 1 R-505 64,000 64,000 2464 2464 RM TK 2461.538 4.10E-05 

Leach Tank #1, Location 2 R-506 64,000 64,000 2464 2464 RM TK 2461.538 4.10E-05 

Open Pregnant Channel, Phase 2, 4/5 Pond, Turbulent Liquid R-507 280 280 11 11 RM CO 10.769 1.79E-07 Sample Replicate R-508 300 12Covered Pregnant Channel, Location 1 R-509 25 25 0.96 0.96 RM CC 0.962 1.60E-08 Covered Pregnant Channel, Location 2 R-510 31 31 1.2 1.2 RM CC 1.192 1.99E-08 

Tailings Pond Channel, Turbulent, Location 1 R-511 95 95 3.7 3.7 RM TA 3.654 6.09E-08 

Tailings Pond Channel, Turbulent, Location 2 R-512 80 80 3.1 3.1 RM TA 3.077 5.13E-08 

Media Blank R-513 <6.8 <0.26

7
2/26/2010

Sample

Location IDCORTEZTailings Pond- Area #1, Wet Seds C-101Tailings Pond- Area #1, Wet Seds C-102Tailings Pond- Area #1, Dry Seds C-103Tailings Pond- Area #1, Dry Seds C-104Tailings Pond- Area #2, Ice on Seds C-105Tailings Pond- Area #2, Wet Seds C-106Tailings Pond- Area #2, Wet Seds C-107Tailings Pond- Area #2, Wet Seds C-108Tailings Pond- Aqueous Surface C-109Tailings Pond- Aqueous Surface C-110Tailings Pond- Ice on Aqueous Surf C-111Tailings Pond- Ice on Aqueous Surf C-112Tailings Pond- Aqueous Surface C-113Tailings Pond- Aqueous Surface C-114Heap Leach- Rain Bird Irrigation, #1 C-115Heap Leach- Rain Bird Irrigation, #2 C-116Sample Replicate C-117Media Blank C-118System Blank C-119Area #30- AH Leach, Area #1, Loc #1 C-201Area #30- AH Leach, Area #1, Loc #2 C-202Area #30- AH Leach, Area #1, Loc #3 C-203Area #30- AH Leach, Area #1, Loc #4 C-204Area #30- Inactive Leach, Area #2, Loc #1 C-205Area #30- Inactive Leach, Area #2, Loc #2 C-206Area #30- Inactive Leach, Area #2, Loc #3 C-207Area #30- Inactive Leach, Area #2, Loc #4 C-208Area #30- AH Leach, Area #3, Loc #1 C-209Area #30- AH Leach Area #3, Loc #2 C-210Area #30- AH Leach Area #3, Loc #3 C-211Area #30- AH Leach Area #3, Loc #4 C-212Area #30- Inactive, Out of leach <30 days, Loc #1 C-213Area #30- Inactive, Out of leach <30 days, Loc #2 C-214Area #30- Inactive, Out of leach <30 days, Loc #3 C-215Area #30- Inactive, Out of leach <30 days, Loc #4 C-216Sample Replicate C-217

kG %

H a0 m/s Sat.

2.11E-03 0.52 8.06E-06 1.3%2.20E-03 0.50 4.23E-06 0.7%2.11E-03 0.52 1.38E-06 0.2%3.16E-03 0.35 3.81E-06 0.6%2.16E-03 0.51 9.17E-07 0.1%2.16E-03 0.51 4.82E-06 0.8%2.20E-03 0.50 3.14E-05 4.9%2.20E-03 0.50 1.60E-05 2.5%2.20E-03 0.50 4.64E-05 7.2%2.20E-03 0.50 5.61E-05 8.7%2.20E-03 0.50 6.28E-05 9.8%2.20E-03 0.50 7.43E-05 11.6%2.20E-03 0.50 6.72E-05 10.5%2.20E-03 0.50 8.00E-05 12.5%2.92E-03 0.44 2.56E-05 4.0%2.92E-03 0.44 2.84E-05 4.4%3.23E-03 0.30 3.35E-05 5.2%3.29E-03 0.29 2.80E-06 0.4%3.16E-03 0.30 7.89E-06 1.2%3.23E-03 0.30 2.79E-06 0.4%2.98E-03 0.33 7.94E-06 1.2%2.92E-03 0.33 1.43E-06 0.2%2.98E-03 0.33 2.65E-05 4.1%3.04E-03 0.32 5.20E-06 0.8%

8
Sample

Location IDCORTEZ

Media Blank C-218Area #30- Inactive, Preped for Leach, Loc #1 C-301Area #30- Inactive, Preped for Leach, Loc #2 C-302Area #30- Inactive, Preped for Leach, Loc #3 C-303Area #30- Inactive, Preped for Leach, Loc #4 C-304Area #30- Active Leach, Sloped, Loc #2 C-305Area #30- Active Leach, Sloped, Loc #1 C-306Area #30- Active Leach, Sloped, Loc #3 C-307Area #30- Active Leach, Sloped, Loc #4 C-308Area #30- Fresh Ore on Preped Heap, Loc #1 C-309Area #30- Fresh Ore on Preped Heap, Loc #2 C-310Area #30- Fresh Ore on Preped Heap, Loc #3 C-311Area #30- Fresh Ore on Preped Heap, Loc #4 C-312Area #28- AH Leach, Area #1, Loc #1 C-313Area #28- AH Leach, Area #1, Loc #2 C-314Area #28- AH Leach, Area #1, Loc #3 C-315Area #28- AH Leach,Area #1, Loc #4 C-316Area #28- AH Leach, Area #2, Loc #1 C-317Area #28- AH Leach, Area #2, Loc #2 C-318Area #28- AH Leach, Area #2, Loc #3 C-319Area #28- AH Leach, Area #2, Loc #4 C-320Sample Replicate C-321Media Blank C-322Area #30- Barren Pond, Sample #1 C-401Area #30- Barren Pond, Sample #2 C-402Area #30- Pregnant Pond, Sample #1 C-403Area #30- Pregnant Pond, Sample #2 C-404Sample Replicate C-405Clarifier Tank, Loc #1 C-406Clarifier Tank, Loc #2 C-407CIL Tank #8, Loc #1 C-408CIL Tank #8- Loc #2 C-409CIL Tank #1- Loc #2 C-410CIL Tank #1- Loc #1 C-411Thicken Tank- Loc #1 C-412Thicken Tank- Loc #2 C-413

kG %

H a0 m/s Sat.

2.38E-03 0.41 4.59E-07 0.1%2.43E-03 0.40 7.42E-06 1.2%2.43E-03 0.40 1.86E-05 2.9%2.20E-03 0.44 8.78E-08 0.0%2.59E-03 0.49 6.93E-06 1.1%2.59E-03 0.49 1.59E-05 2.5%3.43E-03 0.38 1.84E-04 28.7%3.10E-03 0.42 6.09E-06 1.0%2.34E-03 0.42 5.64E-05 8.8%2.34E-03 0.53 1.25E-05 2.0%2.98E-03 0.43 1.42E-05 2.2%3.16E-03 0.41 3.82E-06 0.6%3.64E-03 0.30 3.77E-05 5.9%3.72E-03 0.30 4.66E-05 7.3%3.57E-03 0.31 4.36E-06 0.7%3.43E-03 0.32 4.34E-06 0.7%4.83E-03 1.004.83E-03 1.004.83E-03 0.09 1.80E-04 28.1%4.83E-03 0.09 1.71E-04 26.7%4.83E-03 0.08 2.71E-04 42.3%4.83E-03 0.08 3.17E-04 49.4%4.83E-03 1.004.83E-03 1.00

9
Sample

Location IDCORTEZ

Media Blank C-414GOLD QUARRYTailings Pond- Dry Seds, Loc #1, Snow N-101Tailings Pond- Dry Seds, Loc #2, Snow Removed N-102Tailings Pond- Dry Seds, Loc #3, Snow N-103Tailings Pond- Dry Seds, Loc #4, Snow Removed N-104Tailings Pond- Ice on Aqueous Surf, Loc #1 N-105Tailings Pond- Ice on Aqueous Surf, Loc #2 N-106Tailings Pond- Ice on Aqueous Surf, Loc #3 N-107Tailings Pond- Ice on Aqueous Surf, Loc #4 N-108Sample Replicate N-109Media Blank N-110System Blank N-111Tailings Pond, Area 3, Wet Seds, Ice on Seds N-201Tailings Pond, Area 3, Wet Seds, Liq Film on Seds N-202Tailings Pond, Area 3, Wet Seds, Loc #3 N-203Tailings Pond, Area 3, Wet Seds, Loc #4 N-204Tailings Pond, Area 4, Liquid Surf, End of Barge N-205Tailings Pond, Area 4, Liquid Surf, End of Pier N-206Tailings Pond, Area 4, Liquid Surf, Mid Way of Pier N-207Tailings Pond, Area 4, Liquid Surf, Near Shore N-208Heap Leach, D Lift/Phase 6, Area 1, Loc 1 N-209Heap Leach, D Lift/Phase 6, Area 1, Loc 2 N-210Heap Leach, D Lift/Phase 6, Area 1, Loc 3 N-211Heap Leach, D Lift/Phase 6, Area 1, Loc 4 N-212Heap Leach, D Lift/Phase 6, Area 2, Loc 1 N-213Heap Leach, D Lift/Phase 6, Area 2, Loc 2 N-214Heap Leach, D Lift/Phase 6, Area 2, Loc 3 N-215Heap Leach, D Lift/Phase 6, Area 2, Loc 4 N-216Heap Leach, D Lift/Phase 6, Area 3, Loc 1 N-217Heap Leach, D Lift/Phase 6, Area 3, Loc 2 N-218Heap Leach, D Lift/Phase 6, Area 3, Loc 3 N-219Heap Leach, D Lift/Phase 6, Area 3, Loc 4 N-220Sample Replicate N-221Media Blank N-222

kG %

H a0 m/s Sat.

2.31E-03 0.89 1.54E-05 2.4%2.24E-03 0.90 1.03E-05 1.6%2.29E-03 0.89 8.97E-06 1.4%2.53E-03 0.92 2.89E-05 4.5%2.53E-03 0.92 2.41E-05 3.8%2.53E-03 0.92 1.75E-05 2.7%2.43E-03 0.93 2.87E-05 4.5%2.75E-03 0.76 8.12E-06 1.3%2.43E-03 0.79 3.21E-06 0.5%2.16E-03 0.82 8.87E-08 0.0%2.48E-03 0.79 7.49E-06 1.2%2.53E-03 0.78 3.53E-06 0.6%2.29E-03 0.81 3.34E-05 5.2%2.75E-03 0.76 4.27E-06 0.7%2.48E-03 0.79 6.91E-06 1.1%2.43E-03 0.79 2.32E-06 0.4%2.64E-03 0.76 2.98E-06 0.5%2.80E-03 0.75 2.92E-04 45.6%2.38E-03 0.79 4.17E-06 0.7%

10
Sample

Location IDCORTEZ

Wobbler Irrigation, Phase 3, Loc 1 N-301Wobbler Irrigation, Phase 3, Loc 2 N-302Wobbler Irrigation, Phase 3, Loc 3 N-303Wobbler Irrigation, Phase 3, Loc 4 N-304Heap Leach, D Lift/Phase 7, Area 2, Loc 1 N-305Heap Leach, D Lift/Phase 7, Area 2, Loc 2 N-306Heap Leach, D Lift/Phase 7, Area 2, Loc 3 N-307Heap Leach, D Lift/Phase 7, Area 2, Loc 4 N-308Heap Leach, Phase 6, Cell 7, Inactive 2 Weeks, Loc 1 N-309Heap Leach, Phase 6, Cell 7, Inactive 2 Weeks, Loc 2 N-310Heap Leach, Phase 6, Cell 7, Inactive 2 Weeks, Loc 3 N-311Heap Leach, Phase 6, Cell 7, Inactive 2 Weeks, Loc 4 N-312Heap Leach, North of K Lift, Inacitve Over 1 Year, Loc 1 N-313Heap Leach, North of K Lift, Inactive Over 1 Year, Loc 2 N-314Heap Leach, North of K Lift, Inactive Over 1 Year, Loc 3 N-315Heap Leach, North of K Lift. Inactive Over 1 Year, Loc 4 N-316Heap Leach, Phase 6, Side Slope, Loc 1 N-317Heap Leach, Phase 6, Side Slope, Loc 2 N-318Heap Leach, Phase 6, Side Slope, Loc 3 N-320Heap Leach, Phase 6, Side Slope, Loc 4 N-319Sample Replicate N-321Media Blank N-322Pregnant Solution Channel, Turbulent Surface, Loc 1 N-401Pregnant Solution Channel, Turbulent Surface, Loc 2 N-402Pregnant Solution Channel, Quiescent Surface, Loc 1 N-403Pregnant Solution Channel, Quiescent Surface, Loc 2 N-404Heap Leach, Cell 34, Inactive 7 Months, Loc 1 N-405Heap Leach, Cell 34, Inactive 7 Months, Loc 2 N-406Heap Leach, Cell 34, Inactive 7 Months, Loc 3 N-407Heap Leach, Cell 34, Inactive 7 Months, Loc 4 N-408Heap Leach, N of Cell B03, Phase 7, Active, Loc 1 N-409Heap Leach, N of Cell B03, Phase 7, Active, Loc 2 N-410Heap Leach, N of Cell B03, Phase 7, Active, Loc 3 N-411Heap Leach, N of Cell B03, Phase 7, Active, Loc 4 N-412Heap Leach, E of Cell 47, High Grade Ore, Loc 1 N-413Heap Leach, E of Cell 47, High Grade Ore, Loc 2 N-414Heap Leach, E of Cell 47, High Grade Ore, Loc 3 N-415

kG %

H a0 m/s Sat.

2.11E-03 0.77 1.40E-06 0.2%2.48E-03 0.72 2.73E-05 4.3%2.43E-03 0.73 4.12E-05 6.4%2.64E-03 0.70 7.39E-05 11.5%3.36E-03 0.61 3.55E-04 55.4%2.48E-03 0.72 1.34E-05 2.1%2.59E-03 0.71 2.12E-05 3.3%2.75E-03 0.69 2.29E-06 0.4%2.20E-03 0.76 4.62E-07 0.1%3.16E-03 0.63 2.28E-05 3.6%3.64E-03 0.58 5.09E-05 7.9%3.64E-03 0.58 1.38E-05 2.1%3.50E-03 0.98 2.21E-04 34.6%3.50E-03 0.98 2.19E-04 34.2%3.29E-03 0.98 1.62E-04 25.2%3.04E-03 0.98 1.81E-04 28.2%3.23E-03 0.77 1.53E-05 2.4%2.92E-03 0.80 2.48E-06 0.4%2.98E-03 0.79 7.15E-06 1.1%2.69E-03 0.82 1.92E-06 0.3%2.64E-03 0.82 1.85E-05 2.9%2.59E-03 0.83 8.77E-06 1.4%2.64E-03 0.82 1.42E-04 22.1%

11
Sample

Location IDCORTEZ

Heap Leach, E of Cell 47, High Grade Ore, Loc 4 N-416Sample Replicate N-417Media Blank N-418Mill 5, CIL Tank #7, Loc 1 N-501Sample Repliate N-502Mill 5, CIL Tank #7, Loc 2 N-503Sample Repliate N-504Mill 5, Tank #40, Loc 1 N-505Mill 5, Tank #40, Loc 2 N-506Mill 6, CIL Tank #10, Loc 1 N-507Mill 6, CIL Tank #10, Loc 2 N-508Mill 6, CIL Tank #6, Loc 1 N-509Mill 6, CIL Tank #6, Loc 2 N-510Mill 6, CIL Tank #1, Loc 1 N-511Mill 6, CIL Tank #1, Loc 2 N-512Mill 6, CIL Tank #4, Loc 1 N-513Mill 6, CIL Tank #4, Loc 2 N-514Media Blank N-515ROUND MOUNTAINPregnant Solution Channel- Rock Covered, Loc #1 R-101Pregnant Solution Channel- Rock Covered, Loc #2 R-102Pregnant Solution Channel- Turbulent, Loc #1 R-103Pregnant Solution Channel- Turbulent, Loc #2 R-104Tails Pond Aqueous Source, Loc #1 R-105Tails Pond Aqueous Source, Loc #2 R-106Sample Replicate R-107Media Blank R-108Reusable Pad, Buried Emitters, Flat, Dry, Location 1 R-201Reusable Pad, Buried Emitters, Flat, Ponded, Location 2 R-202Reusable Pad, Buried Emitters, Flat, Wet Rock/Soil, Loc 3 R-203Reusable Pad, Buried Emitters, Flat, Wet Rock/Soil, Loc 4 R-204Reusable Pad, Surface Emitters, Sloped, Over Emitter, Loc 1 R-205Reusable Pad, Surface Emitters, Sloped, Wet Surface, Loc 2 R-206Resuable Pad, Surface Emitters, Sloped, Dry Surface, Loc 3 R-207Resuable Pad, Surface Emitters, Sloped, Wet Surface, Loc 4 R-208South Heap, NE Corner Lift #10, Area #1, Surf Emitters, Loc 1 R-209South Heap, NE Corner Lift #10, Area #1, Surf Emitters, Loc 2 R-210South Heap, NE Corner Lift #10, Area #1, Surf Emitters, Loc 3 R-211South Heap, NE Corner Lift #10, Area #1, Surf Emitters, Loc 4 R-212South Heap, NW Lift #10, Slope, Area #2, Surf Emitters, Loc 1 R-213

kG %

H a0 m/s Sat.

3.43E-03 0.75 2.86E-04 44.6%3.87E-03 0.09 6.44E-05 10.0%3.87E-03 1.003.87E-03 0.09 6.44E-05 10.0%3.87E-03 1.003.95E-03 0.07 9.16E-05 14.3%3.95E-03 0.07 6.62E-05 10.3%1.06E-02 0.02 4.17E-04 65.0%1.06E-02 0.02 4.26E-04 66.4%1.32E-02 0.01 7.19E-04 112.2%1.32E-02 0.01 6.72E-04 104.9%1.62E-02 0.00 1.40E-03 218.3%1.98E-02 0.00 1.65E-03 257.2%1.59E-02 0.00 1.12E-03 175.0%1.59E-02 0.00 9.66E-04 150.6%2.75E-03 0.33 5.67E-07 0.1%2.59E-03 0.35 1.94E-07 0.0%3.57E-03 0.24 2.97E-07 0.0%3.57E-03 0.24 2.79E-07 0.0%2.43E-03 0.97 3.52E-07 0.1%2.43E-03 0.97 4.34E-07 0.1%2.29E-03 0.27 8.61E-07 0.1%2.48E-03 0.25 4.15E-05 6.5%2.34E-03 0.26 1.23E-06 0.2%2.34E-03 0.26 1.07E-06 0.2%2.53E-03 0.24 2.30E-05 3.6%2.53E-03 0.24 4.41E-06 0.7%2.48E-03 0.25 1.43E-06 0.2%2.43E-03 0.25 2.53E-05 3.9%3.16E-03 0.34 3.25E-05 5.1%3.04E-03 0.36 5.67E-07 0.1%2.53E-03 0.43 1.03E-06 0.2%3.04E-03 0.36 1.70E-06 0.3%2.80E-03 0.37 4.31E-07 0.1%

12
Sample

Location IDCORTEZ

South Heap, NW Lift #10, Slope, Area #2, Surf Emitters, Loc 2 R-214South Heap, NW Lift #10, Slope, Area #2, Surf Emitters, Loc 3 R-215South Heap, NW Lift #10, Slope, Area #2, Surf Emitters, Loc 4 R-216South Heap, NW Lift #10, Slope, Area #2, Ice in Shade, Loc 1 R-217South Heap, NW Lift #10, Slope, Area #2, Ice in Sun, Loc 2 R-218South Heap, NW Lift #10, Flat, Area #3, Snow on Heap, Loc 3 R-219South Heap, NW Lift #10, Flat, Area #3, Wet Surf Near Snow, Loc 3 R-220Sample Replicate R-221Media Blank R-222System Blank R-223Tailings Pond, Wet Sediments, Area #1, Loc 1, Wet Slurry R-301Tailings Pond, Wet Sediments, Area #1, Loc 2, Wet Slurry R-302Tailings Pond, Ice on Wet Sediments, Area #1, Ice, Loc 3 R-303Tailings Pond, Ice on Wet Sediments, Area #1, Ice, Loc 4 R-304Tailings Pond, Wet Sediments, Area #2, Loc 1, Wet Slurry R-305Tailings Pond, Wet Sediments, Area #2, Loc 2, Wet Slurry R-306Tailings Pond, Wet Sediments, Area #2, Loc 3, Wet Slurry R-307Tailings Pond, Wet Sediments, Area #2, Loc 4, Wet Slurry R-308Tailings Pond, Dry Sediments, Area #3, Loc 1, Moist Dry Seds R-309Tailings Pond, Dry Sediments, Area #3, Loc 2, Moist Dry Seds R-310Tailings Pond, Dry Sediments, Area #3, Loc 3, Dry Sediments R-311Tailings Pond, Snow on Dry Sediments, Area #3, Loc 4, Snow R-312South Heap, Inactive >1 yr, NE Lift 10, Location 1 R-313South Heap, Inactive >1 yr, NE Lift 10, Location 2 R-314South Heap, Inactive >1 yr, NE Lift 10, Location 3 R-315South Heap, Inactive >1 yr, NE Lift 10, Location 4 R-316South Heap, Inactive <3 months, NE Lift 10, Sloped, Location 1 R-317South Heap, Inactive <3 months, NE Lift 10, Sloped, Location 2 R-318South Heap, Inactive <3 months, NE Lift 10, Sloped, Location 3 R-319South Heap, Inactive <3 months, NE Lift 10, Sloped, Location 4 R-320Sample Replicate R-321Media Blank R-322South Exten Pad, 1 Week, Area 1, Location 1, Subsurf Emit, Dry R-401South Exten Pad, 1 Week, Area 1, Location 2, Subsurf Emit, Moist R-402South Exten Pad, 1 Week, Area 1, Location 3, Subsurf Emit, Dry R-403South Exten Pad, 1 Week, Area 1, Location 4, Subsurf Emit, Moist R-404West Heap, Active, Phase 2, Area 1, Subsurf Emit, Loc1, Dry Ridge R-405West Heap, Active, Phase 2, Area 1, Subsurf Emit, Loc 2, Wet R-406West Heap, Active, Phase 2, Area 1, Subsurf Emit, Loc 3, Damp R-407West Heap, Active, Phase 2, Area 1, Subsurf Emit, Loc 4, Liquid R-408West Heap, Active, Sloped, Surf Emit, Area 2, Loc 1, Typical Moist R-409West Heap, Active, Sloped, Surf Emit, Area 2, Loc 2, Typical Moist R-410West Heap, Active, Sloped, Surf Emit, Area 2, Loc 3, Dry R-411West Heap, Active, Sloped, Surf Emit, Area 2, Loc 4, Wet R-412West Heap, Active, Surf Emit, Area 3, Loc 1, Dry R-413West Heap, Active, Surf Emit, Area 3, Loc 2, Moist R-414West Heap, Active, Surf Emit, Area 3, Loc 3, Over Emitter R-415

kG %

H a0 m/s Sat.

2.75E-03 0.38 2.80E-05 4.4%2.69E-03 0.38 2.11E-06 0.3%2.75E-03 0.38 4.74E-06 0.7%2.20E-03 0.47 1.76E-06 0.3%2.20E-03 0.47 1.02E-06 0.2%2.20E-03 0.49 1.17E-07 0.0%2.53E-03 0.43 3.44E-07 0.1%2.48E-03 0.11 9.49E-07 0.1%2.43E-03 0.12 5.27E-07 0.1%2.29E-03 0.13 5.37E-07 0.1%2.38E-03 0.12 2.49E-06 0.4%2.69E-03 0.22 6.85E-07 0.1%2.64E-03 0.23 1.18E-06 0.2%2.69E-03 0.22 1.43E-06 0.2%2.80E-03 0.21 7.84E-05 12.2%2.80E-03 0.21 1.22E-05 1.9%2.80E-03 0.21 1.52E-05 2.4%2.86E-03 0.21 2.38E-05 3.7%3.16E-03 0.18 8.32E-05 13.0%2.59E-03 0.18 8.38E-07 0.1%2.59E-03 0.18 5.93E-06 0.9%2.92E-03 0.15 1.10E-04 17.1%

13
Sample

Location IDCORTEZ

West Heap, Active, Surf Emit, Area 3, Loc 4, Pooled R-416West Heap, Active, Surf Emit, Area 4, Loc 1, Dry R-417West Heap, Active, Surf Emit, Area 4, Loc 2, Dry R-418Sample Replicate R-419Barren Tank at ADR, Mildly Turbulent, Location 1 R-420Barren Tank at ADR, Mildly Turbulent, Location 2 R-421Pregnant Tank at ADR, Mildly Turbulent, Location 1 R-422Pregnant Tank at ADR, Mildly Turbulent, Location 2 R-423Media Blank R-424CIL Tank #6, Location 1 R-501CIL Tank #6, Location 2 R-502CIL Tank #1, Location 1 R-503CIL Tank #1, Location 2 R-504Leach Tank #1, Location 1 R-505Leach Tank #1, Location 2 R-506Open Pregnant Channel, Phase 2, 4/5 Pond, Turbulent Liquid R-507Sample Replicate R-508Covered Pregnant Channel, Location 1 R-509Covered Pregnant Channel, Location 2 R-510Tailings Pond Channel, Turbulent, Location 1 R-511Tailings Pond Channel, Turbulent, Location 2 R-512Media Blank R-513

kG %

H a0 m/s Sat.

2.20E-03 0.26 7.90E-05 12.3%2.80E-03 1.002.69E-03 1.003.23E-03 0.09 1.90E-04 29.6%3.23E-03 0.09 1.81E-04 28.3%3.43E-03 0.03 7.57E-05 11.8%3.43E-03 0.03 7.10E-05 11.1%3.72E-03 0.05 1.27E-04 19.9%3.72E-03 0.05 1.11E-04 17.3%4.11E-03 0.12 1.40E-04 21.8%4.11E-03 0.12 1.69E-04 26.4%3.95E-03 0.14 1.17E-04 18.2%3.95E-03 0.14 1.17E-04 18.2%3.43E-03 0.42 8.28E-06 1.3%2.64E-03 0.53 7.66E-07 0.1%2.53E-03 0.55 9.59E-07 0.1%2.80E-03 0.98 4.43E-06 0.7%2.80E-03 0.98 3.73E-06 0.6%

14
 15

EF th lb/

Sample CalculationsFlux Box 140 ug 5 L m3 = 5.384615 ug/m2-min nversion fa co ctor 0.03

m3 min 1000 L 0.13 m2

Flux 5.384615 ug 1 min g = 8.97E-08 g conversion factor 1.67

m2-min 60 s 1.00E+06 ug m2-s

METHODOLOGY FOR HCN AIR EMISSION CALCULATIONSE (wet) = kG * HCN * A * F * F a w or E (dry) = EFdry * A 

Where:kG = the gas-phase mass transfer coefficient (m/s).

HCN = the ground level concentration of HCN in the gas phase (g/m 3).

A = the surface area of emission source (m 2).

Fa = [(4*0.13/Pi)0.5 / (4*A/Pi)0.5]0.11, the flux chamber adjustment for area, where A = total area of the source (m 2). The flux chamber 

area is 0.13 m2.

Fw = (U10/3)0.78, the flux chamber adjustment for wind speed. U10 = the wind speed (m/s) at a height of 10 m.

EFdry = eth dry surface emission factor, acre-yr. lb/acre yr

The equations for Fa and Fw come from: USEPA. Air Emissions Models for Waste and Wastewater. EPA 453/R-94-080A,

November 1994.

Vapor-liquid equilibrium equations for x, C l, and HHCN = x * CN- * HWhere:x = the liquid-phase mass fraction of free cyanide that is in the form of HCN CN- = the liquid-phase free cyanide concentration (mg/l = g/m 3 = ppm, mass)

H = Henry's Constant [voll / volg] or [g/m3g / g/m3l]

x = 1/[1 + 10(pH - pKa) ] * MWHCN/MWCN

Where: pKa = -log(K)

K = Dissociation equilibrium constant

MWHCN = 27.02 

MWCN = 26.01 

Conversions 4046.86 m2/acrea

453.5924 g/lb

8760 hr/yr3600 s/hr2000 lb/ton