Source Emissions Testing Report 

Round Mountain Gold Corporation 

Hydrogen Cyanide Emissions 

Pregnant and Barren Tanks / Carbon Stack & Electrowinning Cell Stack 

Smoky Valley Mine 

Nye County, Nevada 

Report prepared for: Report prepared by: 

Mr. Greg Schoen 

Round Mountain Gold Corporation 

Smoky Valley Common Operation 

1 Smoky Valley Mine Road Matt McGregor 

Round Mountain, Nevada 89045 Technical Writer 

 

Test Dates: 

November 4 – 5, 2009 

APT Project: RMG9362 
Table of Contents 

1. Introduction ........................................................................................ 1

2. Methods........................................................................................... 1

3. Test Program Summary................................................................... 2

4. Test Method Details......................................................................... 2

5. Results......................................................................................... 3

Tables 

Table 1.1 : Testing Program Contact Personnel............................... 1

Table 3.1 : Sampling and Analytical Methods................................... 2

Table 5.1 : Test Results Summary, EW Cell............................... 4 

Table 5.2 : Test Results Summary, P/B Tanks & Carbon Kiln......... 4 

Appendices

Testing Parameters..................................................................... Appendix 1

Field Data...................................................................................... Appendix 2 

Laboratory Data............................................................................. Appendix 3

Calibration Data............................................................................. Appendix 4

Schematics................................................................................... Appendix 5
APT Project RMG9362 

Test Report – Smoky Valley Mine HCN Testing 

page 1 

1. Introduction 

Air Pollution Testing, Inc. (APT) was contracted by Round Mountain Gold Corporation for 

source emissions test services conducted at the Smoky Valley Mine facility near Round 

Mountain, Nevada. 

The purpose of the emissions testing program was to quantify the emission levels of 

hydrogen cyanide (HCN) from the pregnant and barren tanks (P/B tanks) / carbon kiln 

stack and the electrowinning (EW) cell stack. 

Contact personnel are provided in Table 1.1 below. 

Round Mountain Gold Corporation : Smoky Valley Mine HCN Testing 

Emissions Testing Program Contact Personnel

Name, Title Company, Address Phone, FAX, email 

Mr. Greg Schoen, 

Environmental Superintendent 

Round Mountain Gold Corporation 

Smoky Valley Mine 

No. 1 Smoky Valley Mine Road 

Round Mountain, Nevada 89045 

775-377-3336, 

775-377-3224, 

greg.schoen@kinross.com 

Mr. Frank Smith, 

Project Manager 

ALS Laboratory Group 

960 W Levoy Drive 

Salt Lake City, Utah 84123 

801-266-7700, 

801-268-9992, 

frank.smith@alsenviro.com 

Mr. Chris Keefe, 

Director of Operations 

Air Pollution Testing, Inc. 

5530 Marshall Street 

Arvada, Colorado 80002 

303-420-5949 ext. 24, 

303-420-5920, 

ckeefe@airtest.net

Table 1.1: Emissions Testing Program Contact Personnel 

2. Methods 

The test program was conducted in accordance with the following U.S. Environmental 

Protection Agency source emissions test methods referenced in 40 CFR Part 60, Appendix 

A. 

 Method 1 – Sample and Velocity Traverses for Stationary Sources 

 Method 2 – Determination of Stack Gas Velocity and Volumetric Flow Rate 

 Method 3 – Gas Analysis for the Determination of Dry Molecular Weight 
APT Project RMG9362 

Test Report – Smoky Valley Mine HCN Testing 

page 2 

 Method 4 – Determination of Moisture Content in Stack Gases 

 CTM-033 Draft Method XHCN – Sampling and Analysis for Hydrogen Cyanide 

 Emissions from Stationary Sources 

3. Test Program Summary 

APT provided all necessary equipment and labor for the determination of all emissions 

parameters detailed in Table 3.1 below. Integrated samples were collected for off-site 

analysis to determine the HCN content of the stack gas. 

At both units, three 60-minute test runs were conducted. 

Round Mountain Gold Corporation : Smoky Valley Mine HCN Testing 

Sampling and Analytical Methods

Parameter Sampling Method Analytical Method Laboratory 

gas flow Methods 1, 2 draft gauge, thermocouple, pitot tube 

O2 , CO2 Method 3 wet chemical (Orsat instrument) 

H2O Method 4 gravimetric 

APT, on-site

HCN CTM-033 Ion specific electrode (ISE) 

ALS Laboratory Group, 

Salt Lake City, Utah 

Table 3.1: Sampling and Analytical Methods Summary

4. Test Method Details

Stack gas flow rate, diluent (oxygen and carbon dioxide) and hydrogen cyanide (HCN) 

emissions were determined in accordance with EPA methods 1 – 4 and CTM-033 Draft 

Method XHCN. 

Each sampling period consisted of conducting a temperature and differential pressure 

traverse of the stack with a K-type thermocouple and an S-type pitot tube. Concurrently, a 

gas sample was extracted at an isokinetic flow rate for a sixty minute period. The gas 

passed through a nozzle, a heated glass probe, across a heated glass fiber filter, through a 

series of 4 chilled glass impingers, and through a calibrated dry gas meter. Please see 

Appendix 5 – Schematics for a diagram of the conditional test method sampling train. 

During each sampling run, a stack gas sample was collected in a clean, leak-free Tedlar 
APT Project RMG9362 

Test Report – Smoky Valley Mine HCN Testing 

page 3 

bag for subsequent diluent analysis using an Orsat instrument. 

Prior to sampling, the first two impingers were seeded with 100 milliliters of 0.1N sodium 

hydroxide (NaOH). The second impinger was empty. The fourth impinger was seeded with 

250 grams of dried silica gel. 

The impingers were recovered along with NaOH rinses in a nalgene container for ion 

specific electrode (ISE) analysis. 

As a QA/QC measure, a reagent blank plus a train blank at each stack were analyzed and 

HCN was not detected. Analysis was conducted by ALS Laboratory Group in Salt Lake 

City, Utah who have current AIHA certification for HCN analysis. 

All of the above data were combined to calculate the stack gas velocity and volumetric flow 

rate in units of feet per second (ft/sec), actual cubic feet per minute (acfm), dry standard 

cubic feet per minute (dscfm), and pounds per hour (lb/hr). The stack gas HCN emissions 

were calculated in units of parts per million, dry volume basis (ppmvd) and pounds per hour 

(lb/hr). 

5. Results

The results of the testing are presented in Tables 5.1 and 5.2. Any testing parameters not 

found in the tables may be found in Appendix 1 – Testing Parameters. 

°F – temperature, measured in degrees Fahrenheit (°F) 

dscfm – dry standard (68°F, 1 atmosphere) cubic feet per minute 

H2O (%vw) – stack gas water vapor content (wet volume percent) 

lb/hr – pounds per hour 

ppmvd – parts per million, dry volume basis 

 
APT Project RMG9362 

Test Report – Smoky Valley Mine HCN Testing 

page 4 

Round Mountain Gold Corporation – Smoky Valley Mine HCN Testing 

Test Results Summary, EW Cell (November 4 – 5, 2009)

Run #1 Run #2 Run #3 Average 

Date 11/4/09 11/4/09 11/5/09 

Start Time 15:26 16:52 9:06 

Stop Time 16:28 17:55 10:12 

Sampling Time (minutes) 60 60 60 60 

Stack Temp. (°F) 92 91 77 87 

Stack Flow (dscfm) 2,087 2,092 1,972 2,050 

H2O (%vw) 3.8 3.6 3.9 3.8 

% isokinetic 102.2 102.6 102.4 102.4 

Emissions Data 

HCN (ppmvd) 0.45 0.53 0.31 0.43 

HCN (lb/hr) 0.004 0.005 0.003 0.004 

Table 5.1: Test Results Summary, EW Cell 

Round Mountain Gold Corporation – Smoky Valley Mine HCN Testing 

Test Results Summary, P/B Tanks & Carbon Kiln (November 5, 2009)

Run #1 Run #2 Run #3 Average 

Start Time 13:42 15:10 16:50 

Stop Time 14:49 16:19 17:56 

Sampling Time (minutes) 60 60 60 60 

Stack Temp. (°F) 104 99 100 101 

Stack Flow (dscfm) 481 493 490 488 

H2O (%vw) 9.0 7.8 8.0 8.3 

% isokinetic 91.9 90.5 100.8 94.4 

Emissions Data 

HCN (ppmvd) 2.17 1.59 2.01 1.92 

HCN (lb/hr) 0.004 0.003 0.004 0.004 

Table 5.2: Test Results Summary, P/B Tanks & Carbon Kiln 

Round Mountain Gold Corporation

Smoky Valley Mine

Nye County, NV

EW Cell

11/4/09-11/5/09

CTM-033 Draft Method XHCN

Run # 1 2 3 Average

date 11/04/09 11/04/09 11/05/09

start time 15:26 16:52 9:06

stop time 16:28 17:55 10:12

sampling time (minutes) 60.0 60.0 60.0

DS stack diameter (inches) 23.5 23.5 23.5 23.5

√∆PAVG average (delta P)1⁄2

 (" H2O)1⁄2

0.2444 0.2445 0.2280 0.2390

CP pitot tube constant (unitless) 0.83 0.83 0.83 0.83

TS stack temp. (°F) 92 91 77 87

Pbar barometric pressure (mbar) 817 817 818 817

Pbar barometric pressure (" Hg) 24.13 24.13 24.16 24.14

Ps stack pressure (" H2O) 0.08 0.08 0.03 0.06

Yd meter box Yd (unitless) 1.013 1.013 1.013 1.013

Tm meter temp. (°F) 66 67 67 67

Vm sample volume (ft3

) 43.954 44.282 41.613 43.283

∆H orifice setting delta H (" H2O) 1.3 1.3 1.2 1.3

Vlc moisture (g) 30.1 29.0 31.5 30.2

O2%vd oxygen (%vd) 20.8 21.0 20.9 20.9

CO2%vd carbon dioxide (%vd) 0.0 0.0 0.0 0.0

inches nozzle diameter (inches) 0.395 0.395 0.395 0.395

Run # 1 2 3 Average

micrograms mass HCN (ug) 520 610 340 490

grams mass HCN (g) 0.0005 0.0006 0.0003 0.0005

Run # 1 2 3 Average

Vmstd sample volume (dscf) 36.150 36.372 34.219 35.581

sample volume (dscm) 1.024 1.030 0.969 1.008

Vwstd moisture volume (dscf) 1.417 1.365 1.483 1.422

Bws measured moisture content (%/100) 0.038 0.036 0.042 0.038

saturated moisture content (%/100) 0.063 0.061 0.039 0.054

actual moisture content (%/100) 0.038 0.036 0.039 0.038

MD molecular weight (dry) 28.83 28.84 28.84 28.84

MA molecular weight (actual) 28.42 28.45 28.41 28.43

VS gas velocity (ft/sec) 15.6 15.5 14.3 15.1

FACFM gas flow (acfm) 2,812 2,809 2,587 2,736

FDSCFM gas flow (dscfm) 2,087 2,092 1,972 2,050

lb/hr gas flow (lb/hr) 9,593 9,609 9,073 9,425

% % isokinetic 102.2 102.6 102.4 102.4

lb/hr HCN (lb/hr) 0.004 0.005 0.003 0.004

ppmvd HCN (ppmvd) 0.45 0.53 0.31 0.43

Field Reference Method Data

Laboratory Data

Reference Method Calculations
Round Mountain Gold Corporation

Smoky Valley Mine

Nye County, NV

P/B Tanks & Carbon Kiln

11/5/2009

CTM-033 Draft Method XHCN

Run # 1 2 3 Average

date 11/05/09 11/05/09 11/05/09

start time 13:42 15:10 16:50

stop time 14:49 16:19 17:56

sampling time (minutes) 60.0 60.0 60.0

DS stack diameter (inches) 8.25 8.25 8.25 8.25

√∆PAVG average (delta P)1⁄2

 (" H2O)1⁄2

0.4050 0.4092 0.4082 0.4075

CP pitot tube constant (unitless) 0.99 0.99 0.99 0.99

TS stack temp. (°F) 104 99 100 101

Pbar barometric pressure (mbar) 818 818 818 818

Pbar barometric pressure (" Hg) 24.16 24.16 24.16 24.16

Ps stack pressure (" H2O) 0.12 0.12 0.12 0.12

Yd meter box Yd (unitless) 1.013 1.013 1.013 1.013

Tm meter temp. (°F) 66 66 65 66

Vm sample volume (ft3

) 47.441 47.939 52.915 49.432

∆H orifice setting delta H (" H2O) 1.5 1.6 1.9 1.7

Vlc moisture (g) 100.9 91.7 108.7 100.4

O2%vd oxygen (%vd) 20.9 21.0 20.8 20.9

CO2%vd carbon dioxide (%vd) 0.0 0.0 0.0 0.0

inches nozzle diameter (inches) 0.317 0.317 0.317 0.317

Run # 1 2 3 Average

micrograms mass HCN (ug) 2700 2000 2800 2500

grams mass HCN (g) 0.0027 0.0020 0.0028 0.0025

Run # 1 2 3 Average

Vmstd sample volume (dscf) 39.102 39.525 43.757 40.795

sample volume (dscm) 1.107 1.119 1.239 1.155

Vwstd moisture volume (dscf) 4.749 4.316 5.117 4.727

Bws measured moisture content (%/100) 0.108 0.098 0.105 0.104

saturated moisture content (%/100) 0.090 0.078 0.080 0.083

actual moisture content (%/100) 0.090 0.078 0.080 0.083

MD molecular weight (dry) 28.84 28.84 28.83 28.84

MA molecular weight (actual) 27.86 27.99 27.96 27.94

VS gas velocity (ft/sec) 31.4 31.5 31.5 31.4

FACFM gas flow (acfm) 699 701 701 700

FDSCFM gas flow (dscfm) 481 493 490 488

lb/hr gas flow (lb/hr) 2,290 2,330 2,320 2,313

% % isokinetic 91.9 90.5 100.8 94.4

lb/hr HCN (lb/hr) 0.004 0.003 0.004 0.004

ppmvd HCN (ppmvd) 2.17 1.59 2.01 1.92

Field Reference Method Data

Laboratory Data

Reference Method Calculations















Page 1 of 3

Thu, 11/12/09 4:15 PM

ANALYTICAL REPORT

Paul Ottenstein

Air Pollution Testing, Inc.

12421 W 49th

Wheat Ridge, CO 80033

Phone:

Fax:

E-mail:

(303) 420-5949

(303) 420-5920

amongold@airtest.net

Report Date November 12, 2009

Project Manager Frank Smith

Workorder: 9313048

Purchase Order:

Client Project ID: Air Pollution Testing, Inc

RMG9362

Analytical Results

11/4/2009

9313048001 11/9/2009

Sample ID:

Lab ID:

Media: Collected:

Received:

.1N NaOH Reagent 1000 mL Nalgene

Sampling Location: Smokey Valley Mine

Method:

Analyte ug/sample mg/m3 ppm

NIOSH 7904 Mod. Analyzed: 11/12/2009

RL (ug/sample)

Hydrogen Cyanide <3.0 NA NA 3.0

11/4/2009

9313048002 11/9/2009

Sample ID:

Lab ID:

Media: Collected:

Received:

E.W. CONT #3 Train BLK 1000 mL Nalgene

Sampling Location: Smokey Valley Mine

Method:

Analyte ug/sample mg/m3 ppm

NIOSH 7904 Mod. Analyzed: 11/12/2009

RL (ug/sample)

Hydrogen Cyanide <3.1 NA NA 3.1

11/4/2009

9313048003 11/9/2009

Sample ID:

Lab ID:

Media: Collected:

Received:

E.W. CONT #3-1 1000 mL Nalgene

Sampling Location: Smokey Valley Mine

Method:

Analyte ug/sample mg/m3 ppm

NIOSH 7904 Mod. Analyzed: 11/12/2009

RL (ug/sample)

Hydrogen Cyanide 520 NA NA 3.2

11/4/2009

9313048004 11/9/2009

Sample ID:

Lab ID:

Media: Collected:

Received:

E.W. CONT #3-2 1000 mL Nalgene

Sampling Location: Smokey Valley Mine

Method:

Analyte ug/sample mg/m3 ppm

NIOSH 7904 Mod. Analyzed: 11/12/2009

RL (ug/sample)

Hydrogen Cyanide 610 NA NA 3.2

IHREP-V9.7
Page 2 of 3

Thu, 11/12/09 4:15 PM

ANALYTICAL REPORT

Project Manager Frank Smith

Workorder: 9313048

Purchase Order:

Client Project ID: Air Pollution Testing, Inc

RMG9362

Analytical Results

11/5/2009

9313048005 11/9/2009

Sample ID:

Lab ID:

Media: Collected:

Received:

E.W. CONT #3-3 1000 mL Nalgene

Sampling Location: Smokey Valley Mine

Method:

Analyte ug/sample mg/m3 ppm

NIOSH 7904 Mod. Analyzed: 11/12/2009

RL (ug/sample)

Hydrogen Cyanide 340 NA NA 3.1

11/5/2009

9313048006 11/9/2009

Sample ID:

Lab ID:

Media: Collected:

Received:

Carbon Kiln Cont#3 T.B. 1000 mL Nalgene

Sampling Location: Smokey Valley Mine

Method:

Analyte ug/sample mg/m3 ppm

NIOSH 7904 Mod. Analyzed: 11/12/2009

RL (ug/sample)

Hydrogen Cyanide <3.0 NA NA 3.0

11/5/2009

9313048007 11/9/2009

Sample ID:

Lab ID:

Media: Collected:

Received:

Carbon Kiln Cont#3-1 1000 mL Nalgene

Sampling Location: Smokey Valley Mine

Method:

Analyte ug/sample mg/m3 ppm

NIOSH 7904 Mod. Analyzed: 11/12/2009

RL (ug/sample)

Hydrogen Cyanide 2700 NA NA 3.7

11/5/2009

9313048008 11/9/2009

Sample ID:

Lab ID:

Media: Collected:

Received:

Carbon Kiln Cont#3-2 1000 mL Nalgene

Sampling Location: Smokey Valley Mine

Method:

Analyte ug/sample mg/m3 ppm

NIOSH 7904 Mod. Analyzed: 11/12/2009

RL (ug/sample)

Hydrogen Cyanide 2000 NA NA 4.7

11/5/2009

9313048009 11/9/2009

Sample ID:

Lab ID:

Media: Collected:

Received:

Carbon Kiln Cont#3-3 1000 mL Nalgene

Sampling Location: Smokey Valley Mine

Method:

Analyte ug/sample mg/m3 ppm

NIOSH 7904 Mod. Analyzed: 11/12/2009

RL (ug/sample)

Hydrogen Cyanide 2800 NA NA 4.8

Workorder Comments

9313048 The samoke volumes were: 9313048001 = 296mL, 9313048002 = 308mL, 9313048003 =

317mL, 9313048004 = 324mL, 9313048005 = 312mL, 9313048006 = 298mL, 9313048007 =

374mL, 9313048008 = 467mL, 9313048009 = 481mL.

IHREP-V9.7
Page 3 of 3

Thu, 11/12/09 4:15 PM

ANALYTICAL REPORT

Project Manager Frank Smith

Workorder: 9313048

Purchase Order:

Client Project ID: Air Pollution Testing, Inc

RMG9362

Report Authorization

Method: NIOSH 7904 Mod.

Sarah E. Adamson Anna Petersen

Analyst Peer Review

LOD = Limit of Detection = MDL = Method Detection Limit, A statistical estimate of method/media/instrument sensitivity.

LOQ = Limit of Quantitation = RL = Reporting Limit, A verified value of method/media/instrument sensitivity.

ND = Not Detected, Testing result not detected above the LOD or LOQ.

** No result could be reported, see sample comments for details.

< This testing result is less than the numerical value.

( ) This testing result is between the LOD and LOQ and has higher analytical uncertainty than values at or above the LOQ.

Definitions

The results provided in this report relate only to the items tested.

Samples were received in acceptable condition unless otherwise noted.

Samples have not been blank corrected unless otherwise noted.

This test report shall not be reproduced, except in full, without written approval of ALS Laboratory Group.

General Lab Comments

ALS Laboratory Group is accredited by AIHA for specific fields of testing as documented in its current scope of accreditation

(ID#101574) which is available on request by contacting your project manager or view on the internet at http://www.aiha.org. The

quality systems implemented in the laboratory apply to all methods performed by ALS Laboratory Group regardless of this current

scope of accreditation which does not include performance based methods, modified methods, and methods applied to matrices

not listed in the methods.

ALS DataChem provides professional analytical services for all samples submitted. ALS Laboratory Group is not in a position to

interpret the data and assumes no responsibility for the quality of the samples submitted.

Phone: (801) 266-7700

Email: lab@datachem.com

Web: www.datachem.com

Laboratory Contact Information

ALS Laboratory Group (formerly DataChem Laboratories, Inc.)

960 W Levoy Drive

Salt Lake City, Utah 84123

IHREP-V9.7