CLIFFS NATURAL RESOURCES Northshore Mining Company 10 Outer Drive, Silver Bay, MN 55614 P 218.226 4125 F 218 226.6037 clifIsnaturaIresources.com



### November 9, 2009

Mr. Robert Beresford Minnesota Pollution Control Agency 525 Lafayette Road North . St. Paul, MN 55165-4194

Re: Summary of Results from Extended NOx Testing at Northshore Furnaces 11 and 12

Dear Mr. Beresford: On April 7, 2008, Northshore Mining and the Minnesota Pollution Control Agency voluntarily entered into an Administrative Order by Consent with regards to nitrogen oxide (N0x) emissions from Northshore's induration furnaces. Part of that Order required Northshore to submit an Alternative Method Proposal, which it did on June 30, 2008, Northshore's Alternative Method Proposal summarized an analysis of emissions measurements from Northshore's Furnaces 11 and 12 that demonstrated that NOx emissions from these furnaces were of small magnitude and low variability. As part of the Alternative Method Proposal, Northshore committed to annually collect and assess additional emissions data from the waste gas portions of Furnaces 11 and 12. This letter is provided as a summary of the 2009 testing, the results of which are attached. The NOx data collected during this testing campaign was comparable to test data collected during 2008. Overall emissions from the waste gas sections of each furnace remain low at less than 80 lb/hr and the Relative Variability Index (as defined in.the 2008 Administrative Order) for Furnaces 11 and 12 was 0.14 and 0.09, respectively. These indices remain below the 0.20 threshold for each furnace, indicating continued stability of NOx concentrations. If you have any questions regarding this information, please feel free to contact me at (218) 226-6076. Sincerely,

Scott A. Gischia, P.E. Section Manager, Environmental Services

# Furnace 11 Stack Testing , :, 1104, 1165 ; 10 

## 4 1 1 05

-. 1104

,. . '1105

Date Tonnage , Combustion Zone Tempetature (F) Gas MOW :. (mdfh) , NOX, ' ppit N1Dx,. '
: ppri t ' Airflow, - dscfm '

.. ' Airflow *.': dsefin Emission kite

. ; IbIlir

. : Etillssiori Rate lb/hr, ,! Total '. Emisslon

. , Rate , lb/hr
, Flags .F11 WG FWA 07/27/09 19:00 252 2322 142 07/27/09 20:00 249 2325 142 07/27/09 21:00 249 2329 141 07127/09 22:00 249 2322 141 07/27/09 23:00 251 2322 140 07/28/09 00:00 250 2322 141 07/28/09 01:00 250 2322 142 07/28/09 02:00 250 2325 141 07/28/090300 :

. - 207 ' 2145 115 07/28/09 04:00 251 2326 137 07/28/09 05:00 249 2328 139 07/28/09 06:00 246 2324 139 07/28/09 07:00 251 2326 143 07/28/09 08:00 242 2326 141 07/28/09 09:00 250 2325 142 07/28/09 10:00 247 2327 141 07/28/09 11:00 246 2327 143 07/28/09 12:00 242 2327 144 07/28/09 13:00 235 2328 142 07/28/09 14:00 249 2323 142 07/28/09 15:00 251 2327 142 07/28/09 16:00 251 2328 143 07/28/09 17:00 248 2329 143 07/28/09 18:00 253 2326 143 07/28/09 19:00 251 2328 143 07/28/09 20:00 250 2327 139 07/28/09 21:00 250 2324 135 07/28/09 22:00 249 2320 135 07/28/09 23:00 247 2324 140 07/29/09 00:00 249 2326 139 07/29/09 01:00 249 2322 137 07/29/09 02:00 249 2322 135 07/29/09 03:00 249 2326 134 07/29/09 04:00 249 2327 134 07/29/09 05:00 249 2327 135 07/29/09 06:00 252 2325 137 98 97 50,942 56,921 359 39.6 75.5 C 98 98 98 100 101 102 102 99 See Below '- 94 96 95 97 C 97 99 103 99 99 97 98 95 93 93 95 97 96 95 99 101 99 102 106 105 103 104 98 99 97 50,886 56,925 36.1 39.7 75.9 99 98 51,500 57,276 36.6 40.0 76.7 101 99 52,986 57,363 38.3 40.5 78.8 102 100 53,750 57,665 39.4 41.3 80.6 104 101 53,974 57,898 40.1 42.1 82.1 103 101 53,821 57,966 39.8 42.0 81.8 101 98 53,768 57,874 38.8 40.8 79.5

95 93 54,238 58,410 36.9 38.8 75.8 97 95 53,112 57,043 36.9 38.6 75.5 96 94 53,965 58,119 37.2 39.1 76.4 98 96 53,088 57,302 37.3 39.5 76.8 98 97 52,974 57,569 37.3 39.8 77.2 100 99 53,318 57,569 38.1 40.9 79.0 103 102 53,283 57,490 39.4 42.1 81.4 100 99 52,971 57,159 37.9 40.4 78.3 100 99 51,229 56,829 36.6 40.2 76.8 98 97 48,708 54,629 34.3 37.9 72.2 99 98 51,058 57,166 36.2 40.0 76.2 96 95 51,956 57,501 35.7 39.1 74.8 93 92 51,882 57,690 34.7 38.0 72.7 94 93 52,738 57,690 35.5 38.4 73.9 96 95 52,260 57,729 35.9 39.1 75.0 98 97 52,021 57,230 36.6 39.7 76.3 97 95 52,788 57,001 36.5 39.0 75.5 96 95 52,165 56,687 35.9 38.4 74.3 99 98 51,698 57,017 36.8 40.1 76.9 102 100 50,859 57,419 37.0 41.1 78.1 100 99 51,759 57,717 37.1 40.9 78.0 103 102 52,251 58,010 38.5 42.3 80.9 107 106 52,435 57,991 40.2 43.9 84.1 105 104 52,189 58,056 39.4 43.4 82.8 104 103 52,877 58,408 39.4 43.0 82.4 104 103 53,827 58,431 40.2 43.1 83.3 98 97 54,627 58,997 38.5 41.2 79.7

This datapoint is excluded from the analysis because the furnace was offline for -30 minutes durin the hour to address an overload of the 124A conve or.

07/28/09 03:00 207 2145 , 115 77 75 53,157 57,944 29.0 31.0 60.0 76 RVI Calculations

11 WG Overall Average 99 PI 7 RVI 0.14

# Furnace 12 Stack Testing ,1264 ,12,5 1204

. - 1205 .104 2 - „ 1205
-.

Date, Tonnage , Combustion Zone

. .

Temperature (F)--, ' Gas low ' (nicfb)

. : NOx, ppm ,,, , NOx, ppm 'AirfloW, Asefrn ' Airflow, :clacfm Emission' - Rate, liaihr Emission Rate,sibihr 2 Emission Rate,lbilir - Flags F12 WG FWA 07/29/09 10:00 244 2301 140 07/29/0911:00 241 2299 135 07/29/09 12:00 240 2300 135 07/29/09 13:00 238 2302 133 07/29/09 14:00 237 2297 133 07/29/09 15:00 237 2300 132 07/29/09 16:00 235 2303 132 07/29/09 17:00 243 2299 133 07/29/09 18:00 245 2299 134 07/29/09 19:00 246 2301 133 07/29/09 20:00 246 2301 134 07/29/09 21:00 246 2300 134 07/29/09 22:00 245 2301 133 07/29/09 23:00 245 2301 133 07/30/09 00:00 245 2301 133 07/30/09 01:00 245 2301 134 07/30/09 02:00 247 2302 133 07/30/09 03:00 250 2304 133 07/30/09 04:00 250 2297 135 07/30/09 05:00 251 2299 135 07/30/09 06:00 252 2300 134 07/30/09 07:00 255 2303 135 07/30/09 08:00 249 2302 135 07/30/09 09:00 249 2301 135 07/30/09 10:00 250 2296 134 07/30/09 11:00 249 2295 134 07/30/09 12:00 249 2298 133 07/30/09 13:00 249 2297 133 07/30/09 14:00 252 2301 135 07/30/09 15:00 253 2299 135 07/30/09 16:00 250 2299 135 07/30/09 17:00 248 2301 135 93 93 57,738 54,950 38.4 36.6 74.9 93 95 95 95 94 93 93 94 94 93 93 93 92 92 91 91 91 91 90 91 90

- 87 91 92 91 90 88 88 89 88 89 89 95 95 53,707 54,561 36.4 37.1 73.4 95 95 53,416 54,338 36.3 37.0 73.2 94 95 53,283 54,159 36.0 36.7 72.8 94 94 53,527 54,212 35.9 36.4 72.4 93 93 53,102 53,862 35.5 36.0 71.5 92 93 53,166 53,973 35.2 35.9 71.1 94 94 53,288 54,069 35.7 36.3 72.1 94 94 53,163 54,053 35.7 36.3 72.0 93 94 53,420 53,953 35.6 36.3 71.9 92 93 53,394 54,043 35.3 35.9 71.2 92 93 53,304 54,171 35.3 36.0 71.2 92 92 53,697 54,398 35.2 36.0 71.2 91 92 53,708 54,404 35.0 35.9 70.9 90 91 53,774 54,171 34.8 35.2 70.1 90 91 53,504 54,206 34.7 35.3 70.0 91 91 53,888 54,513 35.0 35.7 70.7 91 91 54,069 54,848 35.1 35.8 70.9 90 90 53,540 54,183 34.5 35.1 69.6 90 91 54,471 55,048 35.3 35.9 71.1 90 91 54,179 55,011 34.9 35.7 70.6 87 88 54,821 55,357 34.3 34.8 69.0 90 91 54,203 54,962 35.0 35.8 70.8 92 92 53,870 54,666 35.6 36.0 71.6 91 91 54,095 54,624 35.3 35.7 71.0 89 90 53,715 54,573 34.4 35.2 69.6 88 89 54,446 54,876 34.2 34.8 69.0 88 89 54,381 55,021 34.3 35.1 69.3 88 89 54,540 55,196 34.6 35.3 69.9 88 89 54,283 55,339 34.0 35.1 69.2 89 90 53,784 54,424 34.3 35.0 69.3 88 89 53,650 54,434 34.0 34.8 68.8 RVI Calculations

12 WG Overall Average 91 PI 4 RVI 0.09

# Results of the July 27-30, 2009 Continuous Nitrogen 0:rick: - (N0 x

) Monitoring on the Line 11 (EU104) and Line 12 (EU114) Pellet Indurating Furnaces at the Northshore Mining Company's Taconite Facility Located in Silver Bay, iinhinesota

MPCA AQD File Number 27A Air Emission Permit Number 07500003-004
Prepared for Northsh ore Mining Company Silver Bay, Minnesota

November 2009

4700 West 77 1h Street Minneapolis, MN 55435-4803 Phone: (952) 832-2600 Fax: (952) 832-2601

# Northshore Mining Company Silver Bay, Minnesota Stack Test Report

Table of Contents Report certification 1 • Certification of sampling procedures. 1

Certification of Test Report by Testing Company

. 1 Certification of Test Report by Owner or Operator of Emission Facility: 1
Introduction 2
Results 3 Process Description 4 Sampling and Analysis Procedures 5

### List of Tables



## Table 1 Nitrogen Oxides (NO) Emissions - 

## Furnace 11

Table 2 Nitrogen Oxides (NO) Emissions - 

## Furnace 12

List of Figures



## Figure 1 Test Port Locations — Furnace 11 Waste Gas Stacks (SV104 & SV105)

Figure 2 Test Port Locations — Furnace 12 Waste Gas Stacks (SV114 & SV115)

List of Appendices



## Appendix A Report Calculations and Nomenclature Appendix B Instrument Output Appendix C Calibration Data Appendix D Cylinder Gas Certifications Appendix E Process Operating Data Appendix F Stack Test Plan Appendix G Project Participants and Contact Information

11

# Report certification

Certification of sampling procedures: 

## I certify under penalty of law that the sampling procedures were performed in accordance with the approved test plan and that the data presented in this test report are, to the best of my knowledge and belief, true, accurate, and complete. All exceptions are listed and explained below,

Mark Petersen Air Quality Technician Barr Engineering Co. Signature: 

# // 1 Date

Certification of Test Report by Testing Company: 

## I certify under penalty of law that this test report and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the test information submitted. Based on my inquiry of the person or persons who performed sampling and analysis relating to the performance test, the information submitted in this test report is, to the best of my knowledge and belief, true, accurate, and complete. All exceptions are listed and explained below.

Signature: Torn Kuchinski Date Stack Testing Services Supervisor Barr Engineering Co.

Certification of Test Report by Owner or Operator of Emission Facility: 

## I certify under penalty of law that the information submitted in this test report accurately reflects the operating conditions at the emission facility during this performance test and describes the date and nature of all operational and maintenance activities that were performed on the process and control equipment during the month prior to the performance test. Based on my inquiry of the person or persons who performed the operational and maintenance activities, the information submitted in this test report is, to the best of my knowledge and belief, true, accurate, and complete, All exceptions are listed an. 7 !I 

## ained below.

Signature: 

# I Date 

# CE

Iennif r Ram

nv onmentaT ngineer Northshore Mining Company

# Introduction

Barr Engineering performed continuous nitrogen oxides (NO„) emissions testing at Northshore Mining Company located in Silver Bay, Minnesota. The Furnace 11 testing was conducted between July 27-29, 2009 and the Furnace 12 testing occurred from July 29-30, 2009.

The testing was performed in accordance with the Administrative Order by Consent voluntarily entered into by Northshore Mining and the Minnesota Pollution Control Agency on April 7, 2008. Recurrent annual stack testing is part of Northshore's June 2008 Alternative Method Proposal that is used to demonstrate current NOx emissions from the facility. During the tests, the indurating furnaces were operated under normal conditions.

A test plan dated June 20, 2009 was submitted to the Minnesota Pollution Control Agency (MPCA). A pretest meeting was held on July 23, 2009 with representatives of Northshore Mining Company, Barr Engineering and Andy Place of the MPCA. A copy of the test plan and the test plan approval letter issued on July 27, 2009 are provided in Appendix F. Testing was performed as required with method exceptions defined in the test plan and test plan approval letter.

Barr Engineering performed the NO testing with Jennifer Ramsdell of Northshore Mining Company coordinating the test team and facility operations. The tests were not witnessed by a MPCA representative. A list of project participants is provided in Appendix G.

At least 30 hours of valid one-hour NOx emission data points were required from each Waste Gas
stack. There was 36 hours of valid data collected on Line 11 and 32 hours on Line 12. NO emissions were measured simultaneously from the two indurating furnace Waste Gas stacks at each
furnace line.

2

# Results

Testing of Northshore Mining Company's Furnace 11 resulted in a total of 36 valid one-hour data points collected and Furnace 12 resulted in a total of 32 data points.

Data was considered valid when all the analyzers/systems were operating correctly and simultaneously. It was agreed in the MPCA pretest meeting that forty-five minutes of data in an hour could be used to represent one hour of valid data. This would allow normal daily analyzer drift checks and system bias checks to be performed without omission of data provided the procedure could be completed in fifteen minutes. These events are identified in the data set with a "C" flag.

The stack temperatures were also recorded and used to calculate the moisture content of the stacks. Moisture content of the stack gas is determined by calculating the saturated value using the average stack temperature for each hour. These sources have continuous airflow monitors that record in actual cubic feet per minute (acfm) and these data are used with the moisture content and barometric pressure to calculate a dry standard cubic feet per minute (dscfm) airflow rate. The dscfm and NOx concentrations are used to calculate the pound per hour (lb/hr) emissions from each stack. Hourly
emission rates are shown in Tables 1 and 2.

3

# Proce.,o ilescription

Northshore's No. 11 and No. 12 Pelletizers are second generation straight grate furnaces manufactured by Arthur G. McKee Company and were installed in 1962. Each furnace has four major operating zones referred to as the drying zone, pre-heat zone, firing zone and the cooling/recoup zone.

Unfired green balls comprised of iron concentrate and bentonite enter the furnace at the drying zone. A layer of previously fired pellets is placed on the grate (hearth layer) and the green balls are then placed on the hearth layer at the furnace entrance. The green balls are then dried using heat recouped from the furnace. The air from the drying zone is directed to the Hood Exhaust.

The dried pellets enter the firing zone where they are heated sufficiently to start an exothermic reaction caused by conversion of the magnetite to hematite. Natural gas burners are located in the firing zone for providing the necessary heat. The waste gas is exhausted from the firing zone.

Once the exothermic reaction is started the pellets enter the cooling/recoup zone where the exothermic reaction of the pellets is completed and the reacted pellets are cooled before exiting the furnace. The hot exhaust from this zone is recouped for furnace operation and the excess enters the
Hood Exhaust.

Furnace 11 and 12 hood exhaust and waste gas streams are directed to wet wall electrostatic precipitators (WWESP) for emissions control. The waste gas is split evenly between two WWESPs (CE104, CE105 and CE114, CE115). The hood exhaust is directed to three parallel WWESPs (CE101-103 and CE111-113).

Operating parameters of the Furnace 11 and Furnace 12 were recorded every hour for the duration of the tests and are located in Appendix E.

4

# rnpling and AnIyL ocedures

The testing was performed from ports meeting EPA Method 1 criteria. Test port location drawings are provided in Figures 1-2.

Data from the continuous airflow monitors (acfm) was used with the saturated moisture content of the average stack temperature and the barometric pressure to determine the dscfm airflow rates.

The oxygen and carbon dioxide concentrations of the stack gas were determined continuously at one of the Waste Gas stacks and oxygen was monitored continuously at the other Waste Gas stack to
show that the emissions from each stack are similar to one another. Modified EPA Method 3A was used. Final oxygen and carbon dioxide results are not bias corrected.

Nitrogen oxides concentrations were determined using a modified EPA Method 7E. Protocol 1 gas standards were used for daily instrument calibration, system bias checks, and calibration drift checks. Analyzers were calibrated at the beginning of each furnace line test. Intermediate instrument calibration adjustments were not needed as drift and calibration error remained within specifications of the method. The upper span limit used to calculate maximum drift and system bias was 251 ppm NO for the Waste Gas stacks. The MPCA agreed to accept data within 7.5 percent system bias error, but application of that allowance was not needed. System bias calibrations were performed prior to testing and at the completion of the testing at a minimum. Final NO x averages are not bias
corrected.

U. S. EPA test Methods 1, 3A, and 7E are found in 40 CFR Part 60, Appendix A.

Calibration documentation for the instruments is provided in Appendix C. Copies of the gas certification analysis for NO R , oxygen and carbon dioxide are provided in Appendix D.

A Campbell Scientific CR1000 with multiplex board data logger system was used to record the output signals from the stack thermocouple, NO R , oxygen, carbon dioxide concentrations and barometric pressure. The data logger was programmed to collect data every ten seconds and generate one-minute, 15-minute, and one-hour averages. The one-hour averages collected by the data logger were used unless the data for that hour was not valid, but there were three valid 15-minute readings. The average of the three valid fifteen minute readings is used to replace the invalid one-hour reading.

5

# TablesHr # Flags

1

2

3

4

5

6

7

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32 Furnace 12 WG - 1204

NOx, ppm Airflow, dscfm Emission Rate, lb/hr

92.7 57,738 38.4

94.5 53,707 36.4

94.7 53,416 36.3

94.4 53,283 36.0

93.7 53,527 35.9

93.3 53,102 35.5

92.4 53,166 35.2

93.5 53,288 35.7

93.6 53,163 35.7

93.1 53,420 35.6

92.3 53,394 35.3

92.3 53,304 35.3

91.5 53,697 35.2

91.0 53,708 35.0

90.4 53,774 34.8

90.4 53,504 34.7

90.7 53,888 35.0

90.6 54,069 35.1

89.9 53,540 34.5

90.4 54,471 35.3

89.9 54,179 34.9

87.2 54,821 34.3

90.2 54,203 35.0

92.1 53,870 35.6

91.0 54,095 35.3

89.3 53,715 34.4

87.6 54,446 34.2

87.9 54,381 34.3

88.4 54,540 34.6

87.5 54,283 34.0

89.0 53,784 34.3

88.4 53,650 34.0 Furnace 12 WG - 1205

NOx, ppm Airflow, dscfm ' Emission Rate, lb/hr

92.9 54,950 36.6

94.8 54,561 37.1

94.9 54,338 37.0

94.6 54,159 36.7

93.8 54,212 36.4

93.2 53,862 36.0

92.9 53,973 35.9

93.8 54,069 36.3

93.8 54,053 36.3

93.8 53,953 36.3

92.7 54,043 35.9

92.7 54,171 36.0

92.4 54,398 36.0

92.1 54,404 35.9

90.8 54,171 35.2

91.0 54,206 35.3

91.4 54,513 35.7

91.0 54,848 35.8

90.3 54,183 35.1

90.9 55,048 35.9

90.5 55,011 35.7

87.7 55,357 34.8

90.8 54,962 35.8

92.0 54,666 36.0

91.3 54,624 35.7

90.1 54,573 35.2

88.5 54,876 34.8

88.9 55,021 35.1

89.3 55,196 35.3

88.6 55,339 35.1

89.8 54,424 35.0

89.3 54,434 34.8 Time Fired Pellets, LTPH Furnace Gas Use, MCFH

7/29/09 10:00 244.1 139.8

7/29/09 11:00 240.8 135.2

7/29/09 12:00 240.0 135.2

7/29/09 13:00 237.9 133.2

7/29/09 14:00 236.5 133.3

7/29/09 15:00 237.0 132.4

. 7/29/09 16:00 234.8 131.7

7/29/09 17:00 242.7 133.0

7/29/09 18:00 244.6 134.3

7/29/09 19:00 246.2 133.3

7/29/09 20:00 245.5 133.6

7/29/09 21:00 245.8 133.7

7/29/09 22:00 244.9 133.1

7/29/09 23:00 244.6 133.4

7/30/09 0:00 244.7 133.2

7/30/09 1:00 245.0 133.7

7/30/09 2:00 247.0 133.2

7/30/09 3:00 250.4 133.1

7/30/09 4:00 250.4 135.1

7/30/09 5:00 250.8 134.8

7/30/09 6:00 251.5 134.4

7/30/09 7:00 255.0 134.8

7/30/09 8:00 248.8 134.7

7/30/09 9:00 249.4 135.3

7/30/09 10:00 249.7 134.2

7/30/09 11:00 249.2 133.7

7/30/09 12:00 248.6 132.7

7/30/09 13:00 249.2 133.4

7/30/09 14:00 251.9 135.3

7/30/09 15:00 252.6 135.3

7/30/09 16:00 250.3 134.8

7/30/09 17:00 247.6 134.7 Barr Engineering Co. Test Dates: 7/29/09 to 7/30/09 Northshore Mining Company Silver Bay, Minnesota TABLE 2
Nitrogen Oxides (N0x) Emissions Indurating Furnace Line 12

*The average 1-minute readings from 0:01 through 1:00 equals Flags the average 1-hr reading for 1:00 Calibration

# Figures

### 71.5"

ROOF LINE

>14' 4 TEST PORTS ©90

0



### -- , 14'

FURNACE 11 1104 1105



## TEST PORT LOCATION NORTHSHORE MINING SILVER BAY, MINNESOTA FURNACE 11 WASTE GAS 1104 & 1105 IDENTICAL (SV104) 8c (SV 105)

NOT TO SCALE 

## FIGURE 1

# Appendices

# Appendix A

Report Calculations and Nomenclature

### Calculation Equations - EPA Methods 3A, 6C, 7E, 10, Modified 16A/16B

System bias adjustment on source concentration indicated by the analyzer.

C = A 

### — C n ) cmA

ppm

_ co



### where: C ppm is the adjusted source concentration, ppm(dry) CA 

### is the average concentration indicated by the analyzer, ppm(dry) Co is the average of the initial and final system calibration responses of the zero gas, ppm C m is the average of the initial and final system calibration responses of the upscale gas, ppm CrnA is the certified concentration of the upscale calibration gas, ppm

convert source concentration into emission rate (1b/hr).

C mg ) -=
dscm 

## MW X 

### Cppm 

## 24.04

E(Jb1hr) - 

### 4.242 X10 -8 )X 

### C f X 

### 60 X 

### Q d (cc

g 

### M)

where: C amount of compound, by weight(mg), per dry standard cubic meter of air t,riscm MW is the molecular weight of the gaseous compound where MW = 64 SO 2 46 NO 2 28 CO 34 TRS (Assume H 2 S Molecular Weight) 24.04 is the molar volume of gas at 68 °F and 29.92 in Hg, Ug-mole E(lb/hr) emission rate of gaseous compound in pounds per hour 6.242x I is the conversion factor from mg/m 3 to lb/f 3 Qd flow rate of dry gas at standard conditions in cubic feet per minute, dscfrn 60 is the conversion factor from minutes to hours

WABusiness Units WM\Subunit AdminVrechnical & Support Services\A1R SAMPLING \ Templates\Reports\Equations analyzereq.doc

# Furnace 12 Stack Testing - 1204 1205 1204 1205 1204 1205

Date Tonnage Combustion Zone

, Temperature (F) Gas Flow '. (Mei') - Nox, ppm NOx, ppm Airflow, dsofm Airflow, clscfm Emission Rate, 16/hr Emission Rate, lb/hr Total Emission Rate,.lbitlr Flags , F12 WG FWA 07/29/09 10:00 244 2301 140 07/29/09 11:00 241 2299 135 07/29109 12:00 240 2300 135 07/29/09 13:00 238 2302 133 07/29/09 14:00 237 2297 133 07/29/09 15:00 237 2300 132 07/29/09 16:00 235 2303 132 07/29/09 17:00 243 2299 133 07/29/09 18:00 245 2299 134 07/29/09 19:00 246 2301 133 07/29/09 20:00 246 2301 134 07/29/09 21:00 246 2300 134 07/29/0922:00 - 245 2301 133 07/29/09 23:00 245 2301 133 07/30/09 00:00 245 2301 133 07/30/09 01:00 245 2301 134 07/30/09 02:00 247 2302 133 07/30/09 03:00 250 2304 133 07/30/09 04:00 250 2297 135 07/30/09 05:00 251 2299 135 07/30/09 06:00 252 2300 134 07/30/09 07:00 255 2303 135 07/30/09 08:00 249 2302 135 07/30/09 09:00 249 2301 135 07/30/09 10:00 250 2296 134 07/30/09 11:00 249 2295 134 07/30/09 12:00 249 2298 133 07/30/09 13:00 249 2297 133 07/30/09 14:00 252 2301 135 07/30/09 15:00 253 2299 135 07/30/09 16:00 250 2299 135 07/30/09 17:00 248 2301 135 93 93 57,738 54,950 38.4 36.6 74.9 93 95 95 95 94 93 93 94 94 93 93 93 92 92 91 91 91 91 90 91 90 87 91 92 91 90 88 88 89 88 89 89 95 95 53,707 54,561 36.4 37.1 73.4 95 95 53,416 54,338 .36.3 37.0 73.2 94 95 53,283 54,159 36.0 36.7 72.8 94 94 53,527 54,212 35.9 36.4 72.4 93 93 53,102 53,862 35.5 36.0 71.5 92 93 53,166 53,973 35.2 35.9 71.1 94 94 53,288 54,069 35.7 36.3 72.1 94 94 53,163 54,053 35.7 36.3 72.0 93 94 53,420 53,953 35.6 36.3 71.9 92 93 53,394 54,043 35.3 35.9 71.2 92 93 53,304 54,171 35.3 36.0 71.2 92 92 53,697 54,398 35.2 36.0 71.2 91 92 53,708 54,404 35.0 35.9 70.9 90 91 53,774 54,171 34.8 35.2 70.1 90 91 53,504 54,206 34.7 35.3 70.0 91 91 53,888 54,513 35.0 35.7 70.7 91 91 54,069 54,848 35.1 35.8 70.9 90 90 53,540 54,183 34.5 35.1 69.6 90 91 54,471 55,048 35.3 35.9 71.1 90 91 54,179 55,011 34.9 35.7 70.6 87 88 54,821 55,357 34.3 34.8 69.0 90 91 54203 54,962 35.0 35.8 70.8 92 92 53,870 54,666 35.6 36.0 71.6 91 91 54,095 54,624 35.3 35.7 71.0 89 90 53,715 54,573 34.4 35.2 69.6 88 89 54,446 54,876 34.2 34.8 69.0 88 89 54,381 55,021 34.3 35.1 69.3 88 89 54,540 55,196 34.6 35.3 69.9 88 89 54,283 55,339 34.0 35.1 69.2 89 90 53,784 54,424 34.3 35.0 69.3 88 89 53,650 54,434 34.0 34.8 68.8 RVI Calculations

12 WG Overall Average 91 PI 4 RVI 0.09

# Furnace 11 Stack Testing 1104

, 1105

.. 1104- 1105 1104 ' 1105

Date Tonnage Combustion Zone Temperature (F) Gas Flow (mcfi) NOx, ppm .NOX, - p,pm Air

- flow, dscfm Airflow, dscfrn Emission Rate, lb/hr Emission' Rate, Ibfir; :TOW Ethisslon , Rate, lb/hr Flags F11 WG FWA 07/27/09 19:00 07/27/09 20:00 07/27/09 21:00 07/27/09 22:00 07/27/09 23:00 07/28/09 00:00 07/28/09 01:00 07/28109 02:00 1

- .07/28/09,9300

07/28/09 04:00 07/28/09 05:00 07/28/09 06:00 07/28/09 07:00 07/28/09 08:00 07/28/09 09:00 07/28/09 10:00 07/28/09 11:00 07/28/09 12:00 07/28/09 13:00 07/28/09 14:00 07/28/09 15:00 07/28/09 16:00 07/28/09 17:00 07/28/09 18:00 07/28/09 19:00 07/28/09 20:00 07/28/09 21:00 07/28/09 22:00 07/28/09 23:00 07/29/09 00:00 07/29/09 01:00 07/29/09 02:00 07/29/09 03:00 07/29/09 04:00 07/29/09 05:00 07/29/09 06:00 252 2322 142 249 2325 142 249 2329 141 249 2322 141 251 2322 140 250 2322 141 250 2322 142 250 2325 141 98 97 50,942 56,921 35.9 39.6 75.5 C 98 98 98 100 101 102 102 99 99 97 50,886 56,925 36.1 39.7 75.9 99 98 51,500 57,276 36.6 40.0 76.7 101 99 52,986 57,363 38.3 40.5 78.8 102 100 53,750 57,665 39.4 41.3 80.6 104 101 53,974 57,898 40.1 42.1 82.1 103 101 53,821 57,966 39.8 42.0 81.8 101 98 53,768 57,874 38.8 40.8 79.5 '207 2145 115

- See Below 251 2326 137 249 2328 139 246 2324 139 251 2326 143 242 2326 141 250 2325 142 247 2327 141 246 2327 143 242 2327 144 235 2328 142 249 2323 142 251 2327 142 251 2328 143 248 2329 143 253 2326 143 251 2328 143 250 2327 139 250 2324 135 249 2320 135 247 2324 140 249 2326 139 249 2322 137 249 2322 135 249 2326 134 249 2327 134 249 2327 135 252 2325 137 95 93 54,238 58,410 36.9 38.8 75.8 94 96 95 97 C 97 99 103 99 99 97 98 95 93 93 95 97 96 95 99 101 99 102 106 105 103 104 98 97 95 53,112 57,043 36.9 38.6 75.5 96 94 53,965 58,119 37.2 39.1 76.4 98 96 53,088 57,302 37.3 39.5 76.8 98 97 52,974 57,569 37.3 39.8 772 100 99 53,318 57,569 38.1 40.9 79.0 103 102 53,283 57,490 39.4 42.1 81.4 100 99 52,971 57,159 37.9 40.4 78.3 100 99 51,229 56,829 36.6 40.2 76.8 98 97 48,708 54,629 34.3 37.9 72.2 99 98 51,058 57,166 36.2 40.0 76.2 96 95 51,956 57,501 35.7 39.1 74.8 93 92 51,882 57,690 34.7 38.0 72.7 94 93 52,738 57,690 35.5 38.4 73.9 96 95 52,260 57,729 35.9 39.1 75.0 98 97 52,021 57,230 36.6 39.7 76.3 97 95 52,788 57,001 36.5 39.0 75.5 96 95 52,165 56,687 35.9 38.4 74.3 99 98 51,698 57,017 36.8 40.1 76.9 102 100 50,859 57,419 37.0 41.1 78.1 100 99 51,759 57,717 37.1 40.9 78.0 103 102 52,251 58,010 38.5 42.3 80.9 107 106 52,435 57,991 40.2 43.9 84.1 105 104 52,189 58,056 39.4 43.4 82.8 104 103 52,877 58,408 39.4 43.0 82.4 104 103 53,827 58,431 40.2 43.1 83.3 98 97 54,627 58,997 38.5 41.2 79.7

This datapoint is excluded from the analysis because the furnace was offline for -30 minutes during the hour to address an overload of the 124A conveyor. 1: 07/28/0903:00 , 207 2145 115 77 75 1 53,157 I 57
, 944 .1 29.0 •1 , ..31.0 .1 - , 60.0 761 RVI Calculations

11 WG Overall Average 99 PI 7 RVI 0.14

# Appendix B

Instrument OutputSource 1205 WG SV115) Source 1204 WG SV114)

NOx, PPm(drY)

20.1 92.9 94.8 94.9 94.6 93.8 932 92.9 93.8 93.8 93.8 92.7 92.7 92.4 92.1 90.8 91.0 91.4 91.0 90.3 90.9 90.5 87.7 90.8 92.0 91.3 90.1 88.5 88.9 89.3 88.6 89.8 89.3 NOx. FPrn(cilY)

17.0 92.7 94.5 94.7 94.4 93.7 93.3 92.4 93,5 93.6 93.1 92.3 923 91.5 91.0 90.4 90.4 90.7 90.6 89.9 90.4 89.9 87.2 902 92.1 91.0 89.3 87.6 87.9 88.4 87.5 89.0 88.4 Moisture Content,

4.0 16.0 20.4 20.4 20.6 20.6 20.6 20.6 20.6 20.8 20.7 20.5 20.7 20.5 20.5 20.6 20.6 20.7 20.8 20.6 20.4 20.5 20.3 20.5 20.6 20.5 20.6 20.6 20.7 20.6 20.5 20.6 20.7 Moisture Content,

32 20.2 20.4 20.4 20.6 20.5 20.7 20.6 20.7 20.7 20.7 20.5 20.6 20.5 20.4 20.6 20.6 20.7 20.8 20.5 20.4 20.5 20.3 20.4 20.5 20.5 20.6 20.5 20.6 20.6 20.4 20.5 20.7 Airflow Rate, dscfm 75,103 54,950 54,561 54,338 54,159 54,212 53,862 53,973 54,069 54,053 53,953 54,043 54,171 54,398 54,404 54,171 54,206 54,513 54,848 54,183 55,048 55,011 55,357 54,962 54,666 54,624 54.573 54,876 55,021 55,196 55,339 54,424 54,434 Emission Rate, lb/hr

10.8 36.6 37.1 37.0 36.7 36.4 36.0 35.9 36.3 36.3 36.3 35.9 36.0 36.0 35.9 352 35.3 35.7 35.8 35.1 35.9 35.7 34.8 35.8 36.0 35.7 35.2 34.8 35.1 35.3 35.1 35.0 34.8 Airflow Rate, dscfm 72,097 57,738 53,707 53,416 53,283 53,527 53,102 53,166 53288 53.163 53,420 53,394 53,304 53,697 53,708 53,774 53,504 53,888 54,069 53,540 54,471 54,179 54,821 54,203 53,870 54,095 53,715 54,446 54,381 54,540 54,283 53,784 53,650 Emission Rate, lb/hr

8.8 38.4 36.4 36.3 36.0 35.9 35.5 35.2 35.7 35.7 35.6 35.3 35.3 352 35.0 34.8 34.7 35.0 35.1 34.5 35.3 34.9 34.3 35.0 35.6 35.3 34.4 34.2 34.3 34.6 34.0 34.3 34.0 NOTES Flags

Start Test at 0900 Analyzer Data and Calculations

Time Stamp

7/29/2009 9:00 Barometric Pressure, in. Hg 29.03 Fired Pellets, LTPH Furnace Gas Use, MCFH

7/2912009 10:00 29.03 244.1 139.8 7/29/2009 11:00 29.03 240.8 135.2 7/29/2009 12:00 29.03 240.0 135.2 7/292009 13:00 29.02 237.9 1332 7/2912009 14:00 29.03 236.5 133.3 7/29/2009 15:00 29.03 237.0 132.4 7129/2009 16:00 29.03 234.8 131.7 7129/2009 17:00 29.03 242.7 133.0 7/29/2009 18:00 29.02 244.6 134.3 7/2912009 19:00 29.02 246.2 133.3 7/29/2009 20:00 29.02 245.5 133.6 7/29/2009 21:00 29.02 245.8 133.7 7129/200933:00 29.03 244.9 133.1 7/29/2009 23:00 29.04 244.6 133.4 7/30/2009 0:00 29.03 244.7 133.2 7/30/2009 1:00 29.02 245.0 133.7 7/30/2009 2:00 29.02 247.0 133.2 7/30/2009 3:00 29.01 250.4 133.1 7/30/2009 4:00 29.01 250.4 135.1 7130120095:00 29.01 250.8 134.8 7/30120096:00 29.00 251.5 134.4 7/30/2009 7:00 29.00 255.0 134.8 7/30/2009 8:00 29.01 248.8 134.7 7/30/2009 9:00 29.02 249.4 135.3 7/30/2009 10:00 29.02 249.7 134.2 7/30/2009 11:00 29.02 249.2 133.7 7/30/2009 12:00 29.01 248.6 132.7 7/30/2009 13:00 29.00 2492 133.4 7/30/2009 14:00 29.01 251.9 135.3 7/30/2009 15:00 29.03 252.6 135.3 7/30/2009 16:00 29.02 250.3 134.8 7/30/2009 17:00 29.01 247.6 134.7 Furnace 12 VVG -1205 (SV115) Furnace 12 WG -1204 (SV114) Airflow (CEMS Data), Stack NO R
, 0 2
, ACFM Temp., ppm % x1,000 °F NO„,
ppm Airflow (CEMS Data), 0 2, CO, ACFM % % x1,000 Stack Temp.,

°F 20.1 15.7 81.22 76.3 17.0 16.0 1.8 79.61 83.1 92.9 16.9 80.51 139.0 92.7 16.8 2.0 79.20 130.2 94.8 17.0 80.20 139.4 94.5 17.0 1.9 78.95 139.4 94.9 17.0 79.81 139.3 94.7 16.9 1.8 78.52 139.4 94.6 17.0 79.85 139.7 94.4 17.0 1.8 78.55 139.7 93.8 17.0 79.82 139.6 93.7 17.0 1.8 78.88 139.7 93.2 16.9 79.51 139.9 93.3 17.0 1.8 78.32 139.8 92.9 17.0 79.54 139.7 92.4 17.0 1.8 78.35 139.7 93.8 16.9 79.81 139.9 93.5 17.0 1.8 78.59 139.8 93.8 17.0 79.89 140.0 93.6 17.0 1.8 78.64 140.1 93.8 17.0 79.74 140.0 93.1 16.9 1.8 78.89 139.9 92.7 17.0 79.54 139.5 92.3 17.0 1.8 78.65 139.6 92.7 17.0 79.93 139.8 92.3 17.0 1.8 78.72 139.9 92.4 17.0 80.03 139.5 91.5 17.0 1.8 79.06 139.6 92.1 17.0 80.00 139.5 91.0 16.9 1.8 79.05 139.6 90.8 17.0 79.83 139.7 90.4 17.0 1.8 79.31 139.8 91.0 17.0 79.91 139.7 90.4 17.0 1.8 78.95 139.8 91.4 17.0 80.50 139.9 90.7 17.0 1.8 79.65 140.0 91.0 17.0 81.17 140.1 90.6 17.0 1.8 80.08 140.2 90.3 17.1 79.85 139.6 89.9 17.0 1.8 78.97 139.7 90.9 17.1 80.99 139.4 90.4 17.0 1.8 80.14 139.4 90.5 17.1 81.04 139.5 89.9 17.0 1.7 79.88 139.6 87.7 17.1 81.28 139.1 87.2 17.0 1.7 80.55 139.2 90.8 17.1 80.86 139.4 90.2 17.0 1.8 79.81 139.5 92.0 16.9 80.52 139.6 92.1 16.9 1.8 79.42 139.7 91.3 17.0 80.40 139.5 91.0 17.0 1.8 79.62 139.5 90.1 17.0 80.46 139.7 89.3 17.0 1.8 79.26 139.8 88.5 17.1 8037 139.6 87.6 17.0 1.8 80.30 139.7 88.9 17.1 81.25 139.8 87.9 17.0 1.8 80.38 139.9 89.3 17.1 81.41 139.7 88.4 17.0 1.8 80.51 139.8 88.6 17.1 81.34 139.4 87.5 17.0 1.8 79.86 139.5 89.8 17.0 80.17 139.6 89.0 17.0 1.8 7929 139.7 89.3 17.0 80.42 139.9 88.4 16.9 1.8 79.33 140.0

Furnace 12

# Appendix C

Calibration Data

### Analyzer Calibrations

Furnace 11 WG - 1105 (SV105) NO, 02, PPm 96 16.7 97 16.7 97 16.7 98 16.7 99 16.7 99 16.8 99 16.8 98 16.8 97 16.8 97 16.8 97 16.8 97 16.8 98 16.8 98 16.8 96 16.1 19 9.1 NO„
PPm

1 Furnace 11 WG - 1104 SV104) CO 2
,

9 0 9.0 

### 3.2 0.2 0,1 0.3 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 5.1 8.6 8.9 9:0 

### 6.0 0.1 0.0 Time Stamp 7/27/2009 18:02 7/27/2009 18:03 7/27/2009 18:04 7/27/2009 18:05 7/27/2009 18:06 7/27/2009 18:07 7/27/2009 18:08 7/27/2009 18:09 7/27/2009 18:10 7/27/2009 18:11 7/27/2009 18:12 7/27/2009 18:13 7/27/2009 18:14 7/27/2009 18:15

7/28/2009 7:31 7/28/2009 7:32 7/28/2009 7:33 7/28/2009 7:34 7/28/2009 7:35 7/28/2009 7:36 52 7/28/2009 7:37 109 7/28/2009 7:38 110 7/28/20097:39[ 111 7/28/2009 7:40 113 7/28/2009 7:41 104 7/28/2009 7:42 98 7/28/2009 7:43 98 7/28/2009 7:44 98 7/28/2009 7:45 99 7/29/2009 6:01 95 7/29/2009 6:02 95 7/29/2009 6:03 94 7/29/2009 6:04 94 7/29/2009 6:05 93 7/29/2009 6:06 94 7/29/2009 6:07 94 7/29/2009 6:08 94 7/29/2009 6:09 89 7/29/20096:10 111 7/29/20096:11 111 7/29/20096:12 111 7/29/2009 6:13 111 7/29/2009 6:14 7/29/2009 6:15 7/29/2009 6:16 7/29/20096:17 02,

8 9 8 9 

### 3.1 0,0 P

: 9 

### 1.5 16.5 16.7 16.7 16.7 16.7 16.7 16.7 16.8 12.2 8.8 8.9 8:9 

### 6.1 0.0 0.0 54 114 115 

### 115 103 98 98 98 98 99 99 99 60 2 2 Calibration

16.9 95 16.9 95 16.9 95 16.9 94 16.9 95 16.9 96 16.9 95 16.9 93 7.0 94 0.2 113 0.1 113 

### 0.1 113 107 3 5 2 1 9 : 0 

### 16 1.2 111 0.1 112 0.1 L 113 

### 0,0 113 0.3 110 15.9 99 16.6 98 16.7 98 16.7 99 16.7 99 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.5 -0.1 -0.1 T0,1



### - LZ 1 -0.1 2.1 2.4 8.9 8.9 7.4 7.5 8.9 9.1 -0.1 7.8 16.9 16.9 16.8 16.8 16.8 17.1 17.1 17.1 17.1 17.1 17.0 16.9 16.6 0.2 -0.1

- 0.1 

### 0.0 0.9 1.8 1.8 1.8 1.8 1.8

Final Cals

Furnace 11

# BARR

Northshore Mining Company Furnace 11 7/27-7/29/09 M. Petersen
Analyzer Make & Model Analyzer Serial Number: Analyzer Range (span)

ANALYZER CALIBRATION DATA Note: Difference must be less than +/- 2 percent of span 

### MODIFIED EPA METHOD 7E ANALYZER CALIBRATION

Cylinder Serial No. Certified Value Zero Gas CC47638 (N2) 0 Mid-range CC74072 117 High-range CC78164 251 NO2 CC101276 43,2 Project Sample Loc. Date Operators



### API Model 200EH 218 251 ppm (1105 Waste Gas Stack)

Cal Date: 7/27/2009

Zero Gas Cylinder Value Analyzer Calibration • Response Absolute Difference Difference, % of Span

0:0; 0.0 0.0 

### 0:00°4

- r

. Mid rage 1170 116.0 1 0: 0.40%! High range 251 0 251.0 00 _ 0:00%.. NO2 to NOx Mode 43.2 40.5 Cony. Eff. 93..8io''

SYSTEM CALIBRATION BIAS AND DRIFT DATA: Note: System Cal bias cannot exceed +/- 5 percent of span. Drift cannot exceed +/- 3 percent of span

Cal Values

Response Time (sec) Analyzer Cal Response, PPM System Cal Response, PPM System Cal Cal. Bias % of Span Cal Date: 7/27/2009 Cal. Time: 1709-1815
Zero Gas 47 0 1 040% : Upscale Gas 50 116 113 .20%
Cal Date: 7/28/2009 Cal. Time: 0730-0745
Zero Gas 0 1 0.40% Upscale Gas 116 . 111
Cal Date: 7/29/2009 Cal. Time: 0600-0617
Zero Gas 0 1 0.40%

. Upscale Gas ..........:1.l e

. : : 111 74.69% System Calibration Bias = [(System Cal. Response - Analyzer Cal.Response) pan] x Drift = [(Final System Cal. Response - Initial System Cal Response) / Span] x 100 NOx

# BARR

Project Northshore Mining Company Sample Loc. Furnace 11 Date 7/27-7/29/09 Operators M. Petersen
Analyzer Make & Model API Model 200EH Analyzer Serial Number: 218 Analyzer Range (span) 21
ANALYZER CALIBRATION DATA , Note: Difference must be less than +/- 2 percent of span 

### MODIFIED EPA METHOD 3A ANALYZER CALIBRATION
(Oxygen)



### Cylinder Serial No, Certified Value Zero Gas CC47638 (N2) 0.0 Mid-range CC28340 9.0 High-range CC60429 21.0 (1105 Waste Gas Stack)

Cal Date: 7/27/2009

Zero Gas Cylinder Value Analyzer Calibration Response Absolute Difference Difference, % of Span

0.0 0.0 : 0.00% Mid-rage 9.0 9.0 0 0.00% High-range:

- 

### 21,0 21.0 0.0 0.00%

SYSTEM CALIBRATION BIAS AND DRIFT DATA: Note: System Cal bias cannot exceed +/- 5 percent of span. Drift cannot exceed +/- 3 percent of span

Cal Values
Response Time (sec) Analyzer Cal Response, PPM System Cal Response, PPM System Cal Cal. Bias % of Span Cal Date: 7/27/2009 Cal. Time: 1709-1815 Zero Gas 28 0.0 0.1 148% Upscale Gas 29 9.0 9.0 Cal Date: 7/28/2009 Cal. Time: 0730-0745 Zero Gas .0.0 0.0 : 0.00% Upscale Gas •0 9.0 ;:.0.00% Cal Date: 7/29/2009 Cal. Time: 0600-0617 Zero Gas 0 0.0 0.00%_ Upscale Gas 9 0 8.9 -0.48%,. System Calibration Bias = [(System Cal. Response - Analyzer Cal. Response) / Span] x 100 Drift = [(Final System Cal. Response - Initial System Cal Response) / Span] x 100 02Analyzer Make & Model 

### API Model 200EH Analyzer Serial Number: 

### 484 Analyzer Range (span) 

### 251 ppm 

# BARR

Project 

### Northshore Mining Company Sample Loc. 

### Furnace 11 Date 

### 7/27-7/29/09 Operators 

### M. Petersen (1104 Waste Gas Stack) 

### MODIFIED EPA METHOD 7E ANALYZER CALIBRATION

Cylinder Serial No. Certified Value Zero Gas CC47638 (N2) 0 Mid-range CC74072 117 High-range CC78164 251 NO2 CC101276 43.2 ANALYZER CALIBRATION DATA Note: Difference must be less than +/- 2 percent of span

Cal Date: 7/27/2009

Zero Gas Cylinder Value Analyzer Calibration Response Absolute Difference Difference, % of Span

0 0 1.0 1 0 0.40% Mid rage -.0 117 116.0 1 

### 0 040% ' High range 21.0 . 251.0 0.0- 0;00%;_ NO2 to NOx Mode 

### 43.2

.: 41.8 Cony. Eff. 96.8%,,3 ,

SYSTEM CALIBRATION BIAS AND DRIFT DATA: Note: System Cal bias cannot exceed +/- 5 percent of span. Drift cannot exceed +/- 3 percent of span

Cal Values

Response Time (sec) Analyzer Cal Response, PPM System Cal Response, PPM System Cal Cal. Bias % of Span Cal Date: 7/27/2009 Cal. Time: 1709-1815 Zero Gas 48 1 1 000% Upscale Gas 49 116 115 Cal Date: 7/28/2009 Cal. Time: 0730-0745 Zero Gas 1 0,00% Upscale Gas :116::.; 1.20%, Cal Date: 7/29/2009 Cal. Time: 0600-0617 Zero Gas
, 1 0.00% Upscale Gas : - 116'. 113 -1,20% - Drift = [(Final System Cal. Response - Initial System Cal Response) / Span] x 100 

### NOxImi 

## ■ Emo Northshore Mining Company Furnace 11 

# BARR

Project Sample Loc. Date Operators
Analyzer Make & Model Analyzer Serial Number: Analyzer Range (span) 

### MODIFIED EPA METHOD 3A ANALYZER CALIBRATION
(Carbon Dioxide)
(1104 Waste Gas Stack)
Cylinder Serial No. Certified Value Zero Gas CC47638 (N2) 0.0 Mid-range CC60429 5.0 High-range CC28340
, 9.0 7/27-7/29/09 M. Petersen

Cal, Anal. Model 200 1N07006 9.0

ANALYZER CALIBRATION DATA Note: Difference must be less than +/- 2 percent of span

Cal Date: 7/27/2009

Zero Gas Cylinder Value Analyzer Calibration Response Absolute Difference Difference, % of Span

0 0 0.0 0.0'• 0.00%'v:,:'. Mid rage 5 0 5.0 0 0 0.00%'

, High-range: 9:01 1 9.0 0 0.00%.

SYSTEM CALIBRATION BIAS AND DRIFT DATA: Note: System Cal bias cannot exceed +/- 5 percent of span. Drift cannot exceed +/- 3 percent of span

Cal Values

Response Time (sec) Analyzer Cal Response, PPM System Cal Response, PPM System Cal Cal. Bias % of Span
Cal Date: 7/27/2009 Cal. Time: 1709-1815 Zero Gas 27 0.0 0.1 Upscale Gas 27 9.0 9.0 Cal Date: 7/28/2009 Cal, Time: 0730-0745 Zero Gas 0.0 0.00% Upscale Gas :9.0 9.0 . 0.00% - Cal Date: 7/29/2009 Cal. Time: 0600-0617
Zero Gas -0.1 Upscale Gas 9.0' - 9.1 Drift = [(Final System Cal. Response - Initial System Cal Response) / Span] x 100 CO2

### MODIFIED EPA METHOD 3A ANALYZER CALIBRATION

(Oxygen)


### (1104 Waste Gas Stack)
Cylinder Serial No. Certified Value Zero Gas CC47638 (N2) 0.0 Mid-range CC28340 9.0 High-range CC60429 21.0 Analyzer Make & Model Analyzer Serial Number: Analyzer Range (span) Cal. Anal. Model 200 1N07006 21 

# BARR

Project Sample Loc. Date Operators Northshore Mining Company Furnace 11 7/27-7/29/09 M. Petersen

ANALYZER CALIBRATION DATA Note: Difference must be less than +/- 2 percent of span

Cal Date: 7/27/2009

Zero Gas Cylinder Value Analyzer Calibration Response Absolute Difference Difference, % of Span

,,. 0.0 0.0 0. 0 00%; Mid-rage 9.0 . 0.00%

. High-range: 21.0 .- 21.0 0.0 0.00%..

, SYSTEM CALIBRATION BIAS AND DRIFT DATA: Note: System Cal bias cannot exceed +/- 5 percent of span. Drift cannot exceed +/- 3 percent of span

Cal Values
Response Time (sec) Analyzer Cal Response, PPM System Cal Response, PPM System Cal Cal. Bias % of Span Cal Date: 7/27/2009 Cal. Time: 1709-1815 Zero Gas 30 0.0 0.0 . 0.00% Upscale Gas 30 9.0 8.9 :1.:-O48% fl 

### Cal Date: 7/28/2009 Cal. Time: 0730-0745 Zero Gas 001 0.0 6.60

- W Upscale Gas 8.9 -0.48% Cal Date: 7/29/2009 Cal. Time: 0600-0617 Zero Gas 0.0 -0.1 -0.48% Upscale Gas 

# o.a 8.9 _. .' 448%_::

- . Drift = [(Final System Cal. Response - Initial System Cal Response) / Span] x 100 02

### 6.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 16.1 20.9

15.6 9.0 9.0 15.2 20.6 20.6 20.6 20.6 20.6 20.6 20.6 20.7 20.7 20.7 20.7 20.7 20.7 20.7 20.7 20.7 20.7 20.7 20.7 20.7 20.7 20.7 20.8 20.7 20.7 20.7 20.7 18.6 18.9 16.8 56 240 243 252 195 118

79 41 42 42,2



### 12 1 1 1 1 1 1 1 Analyzer Calibrations

Furnace 12 WG - 1205 (SV115) Furnace 12 WG -1204 (SV114) NO„, 02, NO,, 02, 00 2
, Time Stamp ppm % PPm VD 

### 9/0 1.8 0.0 -0.1 7/29/2009 7:46 0 7/29/2009 7:47 0 7/29/2009 7:48 7/29/2009 7:49 I L 0 7/29/2009 7:50 7/29/2009 7:51 223 7/29/2009 7:52 240 7/29/2009 7:53[ 252 7/29/2009 7:54 220 7/29/20097:55 119 7/29/2009 7:56F 118 7/29/2009 7:57 88 7/29/20097:58 40 7/29/2009 7:59 41 7/29/2009 8:00i 41 7 

### 7/29/2009 8:01 21 7/29/2009 8:02 0 7/29/2009 8:03 0 7/29/2009 8:04 0 7/29/2009 8:05 0 7/29/2009 8:06 0 7/29/2009 8:07 0 7/29/2009 8:08 0 7/29/2009 8:09 0 7/29/2009 8:10 0 7/29/2009 8:11 0 7/29/2009 8:12 0 7/29/2009 8:13 0 7/29/2009 8:14 0 7/29/2009 8:15 0 7/29/2009 8:16 0 7/29/2009 8:17 0 7/29/2009 8:18 0 7/29/2009 8:19 0 7/29/2009 8:20 0 7/29/2009 8:21 0 7/29/2009 8:22 0 7/29/2009 8:23 0 7/29/2009 8:24 0 7/29/2009 8:25 0 7/29/2009 8:26 0 7/29/2009 8:27 0 7/29/2009 8:28 0 7/29/2009 8:29 0 7/29/2009 8:30 0 7/29/2009 8:31 0 7/29/2009 8:32 0 7/29/2009 8:33 0 7/29/2009 8:34 0 7/29/2009 8:35 19 7/29/2009 8:36 46 7/29/2009 8:37 3 0.1 0.0 0.0 0.0 0.0 0.0

0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 20.0 5.2 21.3 5.1 21.0 5.0 13.7 9.0 9.1 9.0 9.1 

### 17.1 2.5 20.5 0.3 2 20.5 0.3 3 20.5 0.3 2 20.5 0.3 2 20.5 0.3 3 20.5 0.3 3 20.5 0.3 3 20.6 0.3 2 20.6 0.3 2 20.6 0.3 2 20.6 0.3 3 20.6 0,3 2 20.6 0.2 3 20.6 0.2 2 20.6 0.2 2 20.6 0.2 3 20.6 0.2 2 20.6 0.2 3 20.6 0.2 2 20.6 0.2 3 20.6 0.2 3 20.6 0.2 3 20.7 0.2 3 20.6 0.2 3 20.6 0.2 3 20.6 0.2 2 20.6 0.2 6 20.3 0.2 4 20.6 0.2 3 3.8 0.3 

### 'Analyzer Cal

Furnace 12

### Analyzer Calibrations

Furnace 12 WG - 1205 (SV115) Furnace 12 WG - 1204 (SV114) NO„ 02, NO, 02, CO2, Time Stamp ppm % PPm % %
2 0.3 2 0.2 1 0.1 1 0.1 78 0.1 115 0.1 115 0.1 2 1 1 45 114

115

1 10 80 84 84 83 83 84 86 85 78 109 115 115 105 2.4 34

8 8.8 1 8.9 1

0H 1 9.0 1 10.3 2 20.6 3 19.6 4 16.8 5 16.7 5 16.7 52 16.8 82 16.8 83 16.8 86 16.8 85 16.9 85 10.4 91 0.2 114 7/29/2009 8:38 7/29/2009 8:39 7/29/2009 8:40 7/29/2009 8:41 7/29/2009 8:42 7/29/2009 8:43 7/29/2009 8:44 7/29/2009 8:45 7/29/2009 8:46 7/29/2009 8:47 7/29/2009 8:48 7/29/2009 8:49 7/29/2009 8:50 7/29/2009 8:51 7/29/2009 8:52 7/29/2009 8:53 7/29/2009 8:54 7/29/2009 8:55 7/29/2009 8:56 7/29/2009 8:57 7/29/2009 8:58 7/29/2009 8:59 7/29/2009 9:00 7/30/2009 17:01 7/30/2009 17:02 7/30/2009 17:03 7/30/2009 17:04 7/30/2009 17:05 7/30/2009 17:06 7/30/2009 17:07[ 0.1 0.1 0.0 0.5 0.0 0. 0.1 0.0 0.1 0.0 0.0 0,2 8.3 'System Bias 0.0 8.7 8

.. 9

__-_ 

## a:.61

„ . 

### 8.9 9.0 8.9 9.0 8.9 9.1 18.3 1.9 20.7 0.3 20.6 0.3 20.5 0.3 20.6 0.3 17.1 2.0 16.8 2.0 16.8 2.0 16.9 2.0 16.9 1.9 16.9 1.9 4.3 0.2 0.0 0.1 Final Cals 0.1 115 0 0 0 1 0

- 0 5.0 33 8.0 8,5 8.9 1 8,9 8.8 9.0

.. 89

Furnace 12Project Sample Loc. Date Operators 

### Northshore Mining Company Furnace 12 7/29-7/30/09 M. Petersen
Analyzer Make & Model Analyzer Serial Number: Analyzer Range (span) 

### API Model 200EH 218 251 ppm

ANALYZER CALIBRATION DATA Note: Difference must be less than +/- 2 percent of span 

### MODIFIED EPA METHOD 7E ANALYZER CALIBRATION 

# BARR

(1205 Waste Gas Stack)
Cylinder Serial No. Certified Value Zero Gas CC47638 (N2) 0 Mid-range CC74072 117 High-range CC78164 251 NO2 CC101276 43.2

Cal Date: 7/29/2009

Zero Gas Cylinder Value Analyzer Calibration Response Absolute Difference Difference, % of Span

0 

## o 00 000% Mid-rage :117 118 1 0.

- 40c/0 High range -251 252 10 .- .0.40% NO2 to NOx Mode -43.2 41.7 Cony. Eff. :,,96.5%

SYSTEM CALIBRATION BIAS AND DRIFT DATA: Note: System Cal bias cannot exceed +/- 5 percent of span. Drift cannot exceed +/- 3 percent of span

Cal Values

Response Time (sec) Analyzer Cal Response, PPM System Cal Response, PPM System Cal Cal. Bias % of Span Cal Date: 7/29/2009 Cal. Time: 0749-0900
Zero Gas 47 0 1 0.40% - Upscale Gas 50 118 115 -1.20%
Cal Date: 7/30/2009 Cal. Time: 1700-1707
Zero Gas 0 1 

### Q.417/ Upscale Gas : ,118 115 71.20% System Calibration Bias = [(System Cal. Response - Analyzer Cal. Response) / Spani x Drift = [(Final System Cal. Response - Initial System Cal Response) / Span] x 100 NOx

# BARR lommimn Project Northshore Mining Company Sample Loc. Furnace 12 Date 7/29-7/30/09 Operators M. Petersen
Analyzer Make & Model API Model 200EH Analyzer Serial Number: 218 Analyzer Range (span) 21 

### MODIFIED EPA METHOD 3A ANALYZER CALIBRATION (Oxygen)

Cylinder Serial No. Certified Value Zero Gas CC47638 (N2) 0.0 Mid-range CC28340 9.0 High-range CC60429 21.0 (1205 Waste Gas Stack)

ANALYZER CALIBRATION DATA Note: Difference must be less than +/- 2 percent of span

Cal Date: 7/29/2009

Zero Gas Cylinder Value Analyzer Calibration Response Absolute Difference Difference, % of Span

00- 0.0 0 0 0.00% . Mid rage 9 0 9.0 0.0 0.00%; : High range 21:0 21.0 0.Q. -, - 0:00% •

SYSTEM CALIBRATION BIAS AND DRIFT DATA: Note: System Cal bias cannot exceed +/- 5 percent of span. Drift cannot exceed +/- 3 percent of span

Cal Values
Response Time (sec) Analyzer Cal Response, PPM System Cal Response, PPM System Cal Cal. Bias % of Span Cal Date: 7/29/2009 Cal. Time: 0749-0900 Zero Gas 28 0.0 0.1 Upscale Gas 29 9.0 9.0 0,00% Cal Date: 7/30/2009 Cal. Time: 1700-1707 Zero Gas .---- 0.0 0.1 -9.48% Upscale Gas .= = 9 0 9.0 0.00% System Calibra ion Bias = [(System Cal. Response - Analyzer Cal. Response) / Span] x 100 Drift = [(Final System Cal. Response - Initial System Cal Response) / Span] x 100 02

# BARR

Project Sample Loc. Date Operators Northshore Mining Company Furnace 12 7/29-7/30/09 M. Petersen
Analyzer Make & Model API Model 200EH Analyzer Serial Number: 484 Analyzer Range (span) 251 PPm

ANALYZER CALIBRATION DATA Note: Difference must be less than +/- 2 percent of span 

### MODIFIED EPA METHOD 7E ANALYZER CALIBRATION

Cylinder Serial No. Certified Value Zero Gas CC47638 (N2) 0 Mid-range CC74072 117 High-range CC78164 251 NO2 CC101276 43.2 (1204 Waste Gas Stack)

Cal Date: 7/29/2009

Zero Gas Cylinder Value Analyzer Calibration Response Absolute Difference Difference, % of Span

0 1 10 0,40%
; 

### Mid rage 117 118 1,0 040% High range 251 252 1 0 0.40% NO2 to NOx Mode :432 ' 

### 42.2 Cony. Eff. 97
, 7%:c

. :. -
SYSTEM CALIBRATION BIAS AND DRIFT DATA: Note: System Cal bias cannot exceed +/- 5 percent of span. Drift cannot exceed +/- 3 percent of span

Cal Values
Response Time (sec) Analyzer Cal Response, PPM System Cal Response, PPM System Cal Cal. Bias % of Span Cal Date: 7/29/2009 Cal. Time: 0749-0900 Zero Gas 48 1 1 0.00% Upscale Gas 49 118 115 -1.20% Cal Date: 7/30/2009 Cal. Time: 1700-1707 Zero Gas 1 0.00% Upscale Gas -. 118 115 -1 20% Drift = [(Final System Cal. Response - Initial System Cal Response) / Span] x 100 NOx

# BARR

Project Northshore Mining Company Sample Loc. Furnace 12 Date 7/29-7/30/09 Operators M. Petersen 

### MODIFIED EPA METHOD 3A ANALYZER CALIBRATION (Oxygen)
(1204 Waste Gas Stack)
Cylinder Serial No. Certified Value Zero Gas CC47638 (N2) 0.0 Mid-range CC28340 9,0 High-range CC60429 21.0 Analyzer Make & Model Cal. Anal. Model 200 Analyzer Serial Number: 1N07006 Analyzer Range (span) 21 c/0

ANALYZER CALIBRATION DATA Note: Difference must be less than +/- 2 percent of span

Cal Date: 7/29/2009

Zero Gas Cylinder Value Analyzer Calibration Response Absolute Difference Difference, % of Span

0.0 • 0.0 00 0.00% Mid rage 9 0 9.0 

### So ,d o:oci%: High-range:

. 21.0

. .0.00%1

SYSTEM CALIBRATION BIAS AND DRIFT DATA: Note: System Cal bias cannot exceed +/- 5 percent of span. Drift cannot exceed +/- 3 percent of span

Cal Values
Response Time (sec) Analyzer Cal Response, PPM System Cal Response, PPM System Cal Cal. Bias % of Span Cal Date: 7/29/2009 Cal. Time: 0749-0900 Zero Gas 30 0.0 0.0 Upscale Gas 30 9.0 8.9 Cal Date: 7/30/2009 Cal. Time: 1700-1707 Zero Gas 0.0 ' 0.00% Upscale Gas .: 9,0 :- 8.9 .-0.48 .0 /0

., 

### Drift = [(Final System Cal. Response - Initial System Cal Response) / Span] x 100 02

# BARR

Project 

### Northshore Mining Company Sample Loc. 

### Furnace 12 Date 

### 7/29-7/30/09 Operators M. Petersen
Analyzer Make & Model 

### Cal. Anal. Model 200 Analyzer Serial Number: 

### 1N07006 Analyzer Range (span) 9.0 Cylinder Serial No. Certified Value Zero Gas CC47638 (N2) 0.0 Mid-range CC60429 5.0 High-range CC28340 9.0 

### MODIFIED EPA METHOD 3A

ANALYZER CALIBRATION
(Carbon Dioxide)
(1204 Waste Gas Stack)

ANALYZER CALIBRATION DATA Note: Difference must be less than +/- 2 percent of span

Cal Date: 7/29/2009

Zero Gas Cylinder Value Analyzer Calibration Response Absolute Difference Difference, % of Span

— 00 0.0 0.0 . 0.00%.:. Mid rage :5.0 5.0 0.0 . 0.00% • High range 90 9.1 0 1 1.11%

SYSTEM CALIBRATION BIAS AND DRIFT DATA: Note: System Cal bias cannot exceed +/- 5 percent of span. Drift cannot exceed +/- 3 percent of span

Cal Values
Response Time (sec) Analyzer Cal, Response, PPM System Cal Response, PPM System Cal Cal. Bias % of Span Cal Date: 7/29/2009 Cal. Time: 0749-0900 Zero Gas 27 0,0 0,0 Upscale Gas 27 9.1 8.9 Cal Date: 7/30/2009 Cal. Time: 1700-1707 Zero Gas 0.0 0.1 H 1.11% Upscale Gas 9.1 8.9 

### -2:22% Drift = [(Final System Cal. Response - Initial System Cal Response) / Span] x 100 CO2

### THERMOCOUPLE ID T -56 Regression R Squared = 0.999998

—4—Calibration Curve - Unit Under Test Upper Limit of Calibration —Lower Limit of Calibration —Extrapolated Calibration Curve 

### 1700 1600 fx 1

- 6. 1500
1-1400

300 200 H0 m 

## a t

) ea 0



### 900 0 0 800 rY 700

600
500 THERMOCOUPLE CALIBRATION

400 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 REFERENCE TEMPERATURE, deg.R 

### 03ect 4 ) ,0/ , 12.0s
- ,/ tos s 

## f g ul. 

# ps.



# THERMOCOUPLE CALIBRATION 

# BARR

Cal Date: 

### THERMOCOUPLE ID 1-56 12/23/2008 

### Handheld CALIBRATION TECHNICIAN: PRC

REFERENCE STANDARDS TRACEABILITY DATE LABORATORY
Hart Scientific 9103-A s/n A1B289 Report No. Al B0718 12/26/2007 Hart Scientific Hart Scientific 9140 s/n A1B086 Report No. A1B2024 12/26/2007 Hart Scientific 

### Temperature Calibration Points 32 212 400 650 Ambient Reference Deg F (To) 31.8 212 400 650 70 Probe Temp (deg F) 32 211 399 647 68 Reference Temp (deg R) deg F + 460 491.8 672 860 1110 530 Probe Temp (deg R), deg F + 460 492 671 859 1107 528 Difference (degrees) -0.2 1 3 2 % Diff Abs. T 0.0% 0.1% 0.1% 0.3% 0.4% Is difference less than 1.5% at all measured points? YES

Are extrapolated limits less than 1.5%? YES FAHRENHEIT CALIBRATION RANGE -20 1200 If not acceptable, describe corrective action:
Technician signature
QA signature 

## 00:6 4 7-rtzfr4-0 .4

### Oseot izoyr-floy



# THERMOCOUPLE CALIBRATION 

# BARR

Cal Date: 

## THERMOCOUPLE ID T -54
12122/2008 

## Handheld CALIBRATION TECHNICIAN: PRC

REFERENCE STANDARDS TRACEABILITY DATE LABORATORY

Hart Scientific 9103-A s/n A1B289 Report No. A1B0718 12/26/2007 Hart Scientific Hart Scientific 9140 sin A1B086 Report No. A1B2024 12/26/2007 Hart Scientific 

### Temperature Calibration Points 32 212 400 650 Ambient
Reference Deg F 

### (To) 31.9 212 400 650 70 Probe Temp (deg F) 30 210 397 648 68 Reference Temp (deg R) deg F + 460 491.9 672 860 1110 530 Probe Temp (deg R), deg F + 460 490 670 857 1108 528 Difference (degrees) 1.9 2 3 2 2 % Diff Abs. T 0.4% 0.3% 0.3% 0.4% Is difference less than 1.5% at all measured points? YES



# , THERMOCOUPLE CALIBRATION 1700
1600
THERMOCOUPLE ID T - 54 Regression R Squared = 0.999996 1500 -
1400 

### -a s5 iir 1300 

### Vg 1200 tfi &- 1100 in L 

# ■

- , 1000

a. 8 900 (.1 

### R soo —4—Calibration Curve - Unit Under Test ce Lu of x 700 1-. — Upper Limit Calibration Lower Limit of Calibration 600 —Extrapolated Calibration Curve 500 — I
, ■ , , 1 , , 400 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 REFERENCE TEMPERATURE, deg.R 1600 1700



### FAHRENHEIT Are extrapolated limits less than 1.5%? YES CALIBRATION RANGE -20 1200 If not acceptable, describe corrective action:
Technician signature
QA signature od

# Appendix D

Cylinder Gas Certifications

# I III SCOTT-MARRIN, INC,
6531 BOX SPRINGS BLVD. • RIVERSIDE, CA 92507 TELEPHONE (951)653-6780 FAX (951) 653-2430 

# Report Of Analysis EPA Protocol Gas Mixtures

BARRO1 TO: Barr Engineering Co Attn: Aaron Aamold 7390 OHMS Lane Edina, MN 55439-2330 (952) 832-2959 REPORT NO: 54774-02 

### REPORT DATE: November 25, 20080
CUSTOMER PO NO: 20081023AA0A

CYLINDER NUMBER: 

## CC74072 CYLINDER. SIZE: 150A (141 •std ca.ft) CYLINDER PRESSURE: 2000 psig

COMPONENT CONCENTRATION (v/v) REFERENCE i - EPA UNCERTAINTY STANDARD ANALYZER EXPIRATION MAKE, MODEL, 5/N, DETECTION DATE REPLICATE ANALYSIS DATA

Monitor Labs Model 8440 Serial # 135 Continuous Chemiluminescence LAST CAL DATE: 11/18/2008 

### 11/25/2010 11/18/2008 11/25/2008 

### 117.6 ppm 117.6 ppm 117.7 ppm 118.0 ppm 118.0 ppm 118.0 ppm MEAN: 117.8 ppm 117.9 ppm Nitric oxide
NOx Nitrogen dioxide 117.8 ± 0.9 ppm 117.8 ppm <0.6 ppm GMIS CYLINDER #: CC68777 @101.1 ppmv

02-free Nitrogen Balance

ppm = umole/mole % = mole-% The above analyses were performed in accordance with Procedure 01 of the EPA Traceability Protocol, Report Number EPA-600/R97/121, dated September 1997. The above analyses are invalid if the cylinder pressure is less than 150 psi.

ANALYST: 

# c APPROVED: 

### D.C.Marrin J. T. Marrin
The only liability of this company for gas which fails to comply with this analysts shall be replace ent or reanalysis thereof by the company without extra cost, STANDARD CALIBRATION BASES IN ALUMINUM CYLINDERS

### J. T. Marrin 

# I HI SCOTT-MA.RRIN, INC.

6531 BOX SPRINGS BIND. • RIVERSIDE, CA 92507 TELEPHONE (951) 653-6780 • FAX (951) 653-2430 

# Report Of Analysis NIST-Traceable Gas Mixtures

REPORT 

### NO: 56176-01 REPORT DATE: 

### February 13, 20090 CUSTOMER PO NO: 

### 20090122AMMK2 BARRO1 TO: Barr Engineering Co Attn: Aaron Aamold 7390 OHMS Lane

• Edina, MN 55439-2330 (952) 832-2959

CYLINDER NUMBER: 

# ccioine

COMPONENT CONCENTRATION (v/v) NIST TRACEABLE REFERENCE STANDARD
Nitrogen dioxide Nitrogen 432 ± 0.9 ppmv Balance SRM 1683b

Cylinder size: 150A (121 std Cu ft) Cylinder Pressure: 1725 psig sh,ejr. Life:, 6 months.

•

ppm = umole/mole % = 

### The above analyses are traceable to the National Institute of Standards and Technology by intercomparison with the reference standard listed.hereirb.Where_indicated, volumetric and gravimetric reference standards are traceable thru use of our analytical belance.;- NIST Report Number MMAP 232.09/202491.

ANixLy§T: APPROVED: 

### D.C.Marrin
The only liability of this company for gas which fails to comply with this analysis shall be replace ent or reanalysis thereof by the company without extra cost.
STANDARD CALIBRATION GASES IN ALUMINUM CYLINDERS

# III I SCOTT-MARRIN, INC.
6531 BOX SPRINGS BLVD, • RIVERSIDE, CA 92507 TELEPHONE (951)653-6780 • FAX (951) 653-2430

BARRO1 TO: 

### Barr Engineering Co Attn: Aaron Grosser 7390 OHMS Lane Edina, MN 55439-2330 (952) 832-2959 

# Report Of Analysis EPA Protocol Gas Mixtures

REPORT NO: REPORT DATE: CUSTOMER PO NO: 

### 54622-02 October 29, 20080 20080912CPJR

CYLINDER NUMBER: 

## CC28340 CYLINDER SIZE: 150A (141 std cu ft) CYLINDER PRESSURE: 2000 psig

COMPONENT CONCENTRATION (v/v) REFERENCE ANALYZER ± EPA UNCERTAINTY STANDARD MAKE, MODEL, S/N, DETECTION EXPIRATION DATE REPLICATE ANALYSIS DATA

GMIS CYLINDER #: CC83094 @ 8.09 %

GMIS CYLINDER #: CC51181 @ 10.04% Carbon dioxide 8.98 ± 0.09 %

Oxygen 9.02 ± 0.05 %

'Nitrogen Balance Varian Model 3400 10/27/2011 Serial # 10680 Thermal Conductivity Gas Chromotography LAST CAL DATE: 10/24/2008 ME AN: Varian Model 3800 10/23/201 1 Serial # Thermal Conductivity Gas Chromotography LAST CAL DATE: 10/2/2008 ME AN: 10/27/2008 8.98% 8,98 % 8,98% 8.98% 10/23/2008

9.03% 9.01 % 9.01 % 9.02%

ppm = umole/mole % = mole-% The above analyses were performed in accordance with Procedure 01 of the EPA Traceability Protocol, Report Number EPA-600/R97/121, dated September 1997. The above analyses are inva id if the pylinder pressure is less than 160 psig.

ANALYST: APPROVED: 

### M.S.Calhoun J. T. Marrin
The only liability of this company for gas which fails to comply with this analysis shall be replace ant or reanalysis thereof by the company without extra cost. STANDARD CALIBRATION GASES IN ALUMINUM CYLINDERS

# 111

1 6531 BOX SPRING

- 8 BLVD. • RIVER I SIDE, P CA 92507 I 

# NC

. TELEPHONE (951) 653-6780 • FAX (951) 653-2430 

# Report Of Analysis EPA Protocol Gas Mixtures

BARRO1 TO: Barr Engineering Co Attn: Aaron Aamold 7390 OHMS Lane Edina, MN 55439-2330 (952) 832-2959 REPORT NO: 55580-02 REPORT DATE: 

### April 30, 200911 CUSTOMER PO NO: 20090401AAGA

CYLINDER NUMBER: 

## CC60429

COMPONENT 

### CYLINDER SIZE: 150A

- (141 std Cu ft)

ANALYZER MAKE, MODEL, SIN, DETECTION CYLINDER PRESSURE: 2000 psig
EXPIRATION REPLICATE DATE ANALYSIS DATA 

### CONCENTRATION (v/v) REFERENCE ± EPA UNCERTAINTY STANDARD

Carbon dioxide 5.03 ± 0.05 %

Oxygen 21.02 ± 0.22 %

Nitrogen Balance 

### GMIS Varian Model 3400 4/30/2012 4/30/2009 

### CYLINDER #: Serial # 10680 5.04 % 

### CC83094 Thermal Conductivity 5.03 % 

### @ 8.09% Gas Chromotography 5.02 % LAST CAL DATE: 4/2/2009 MEAN: 5,03 % 

### GMIS Varian Model 3800 4/24/2012 4/24/2009 

### CYLINDER #: Serial # 21.01 % 

### ALM031591 Thermal Conductivity 21.01 % 

### @ 24.39% Gas Chromotography 21.05% LAST CAL DATE: 4/712009 MEAN: 21.02,%

ppm = umole/mole % = mole-% The above analyses were performed in accordance with Procedure G1 of the EPA Traceability Protocol, Report Number EPA-600/R97/121, dated September 1997. The above analyses are inva id if the pylinder pressure is less than 150 psig,



### ANALYST: APPROVED: 

### M.S.Calhoun 

### J. T. Marrin
The only liability of this company for gas which falls to comply with this analysis shall be replace ent or reanalysis thereof by the company without extra cost. STANDARD CALIBRATION GASES IN ALUMINUM CYLINDERS

# Appendix E

Process Operating Data

### Fce 11 NOx

Timestamp 1101 CEMS Flow 1102 CEMS Flow 1103 CEMS Flow 1104 CEMS Flow 1105 CEMS Flow

7/27/2009 18:00 83.10 91.71 86.09 78.22 83.59 7/27/2009 18:30 83.12 91.76 86.03 78.00 83.28 7/27/2009 19:00 83.11 91.42 85.94 77.74 82,98 7/27/2009 19:30 82.99 91.56 85.74 78.12 83.12 7/27/2009 20:00 82.96 91.60 85.78 77.98 83.25 7/27/2009 20:30 83.44 91.54 85.88 78.58 83.81 7/27/2009 21:00 83.50 92.12 86.01 78.38 83.58 7/27/2009 21:30 83.39 91.69 86.01 78.59 83.64 7/27/2009 22:00 83.56 91.94 86.30 79.05 84.07 7/27/2009 22:30 83.75 92.05 86.07 78.66 83.58 7/27/2009 23:00 84.10 91.91 86.39 78.74 84,19 7/27/2009 23:30 83,96 92.26 86.12 78.61 83.81

7/28/2009 0:00 83.92 92.37 86.45 78.99 84.17 7/28/2009 0:30 83.80 92.45 86.48 78.35 83,98 7/28/2009 1:00 83.89 91.95 86.35 78.55 83.80 7/28/2009 1:30 83.95 92.18 86.47 78.56 84.06 7/28/2009 2:00 83.73 91.97 86.53 78.26 83.52 7/28/2009 2:30 80.38 88.74 83.43 75.30 80.33 7/28/2009 3:00 83.93 92.24 86.72 78.56 84.07 7/28/2009 3:30 83.53 92.19 86.31 78.91 84.26 7/28/2009 4:00 80.10 87.63 82.66 78.90 84.47 7/28/2009 4:30 83.66 92.05 86.68 75.26 80.17 7/28/2009 5:00 83.55 91.80 86.57 78.36 84.18 7/28/2009 5:30 83.91 92.31 86.57 78.18 83.50 7/28/2009 6:00 83.76 91.88 86.22 78,34 83.76 7/28/2009 6:30 83.71 91.80 86.71 77.95 83.45 7/28/2009 7:00 82.66 91.25 85.66 77.14 82.50 7/28/2009 7:30 83.17 91.76 86.55 78.36 83.54 7/28/2009 8:00 83.51 91.90 86.30 77.87 82.84 7/28/2009 8:30 83.09 91.30 86.40 78.19 83.76 7/28/2009 9:00 83.55 92.04 86.54 78.14 83.28 7/28/2009 9:30 83.30 91.20 86.29 78.29 83.38 7/28/2009 10:00 83.81 91.93 86.54 77.75 83.50 7/28/2009 10:30 83.15 91.92 86.20 78.03 83.20 7/28/2009 11:00 83.63 91.69 86.11 77.67 83.19 7/28/2009 11:30 83.62 91.99 86.55 77.31 82.66 7128/2009 12:00 83.50 91.85 86.01 77.23 82.70 7/28/2009 12:30 77.14 91.63 79.66 70.84 75.12 7/28/2009 13:00 83.70 92.08 86.35 77.88 83.39 7/28/2009 13:30 83.72 91.84 83.86 78.39 83.70 7/28/2009 14:00 84.23 92.20 86.31 78.45 84.26 7/28/2009 14:30 84.14 92.31 86.55 78.39 84.23 7/28/2009 15:00 83.96 92.60 86.96 78.62 84.29 7/28/2009 15:30 84.32 92.72 86.84 78.55 84.53 7/28/2009 16:00 84.48 92.59 86.92 78.73 84.05

### 7/28/2009 16:30 84.09 92.29 86.68 78.76 84.07 7/28/2009 17:00 84.50 92.31 86.77 78.47 84.10 7/28/2009 17:30 84.13 92.14 86.63 78.44 83.95 7/28/2009 18:00 84.03 92.25 86.86 78.66 84.12 7/28/2009 18:30 83.95 91.75 86.36 77.62 83.04 7/28/2009 19:00 82.94 91.18 85.47 77.74 83.10 7/28/2009 19:30 82.06 90.48 84.96 76.55 81.87 7/28/2009 20:00 81.84 90.21 84.57 76.94 82.18 7/28/2009 20:30 81.98 90.61 84.74 76.91 82.31 7/28/200921:00 82.09 90.48 84.80 76.20 81.27 7/28/2009 21:30 82.41 91.32 85.52 76.89 82.01 7/28/2009 22:00 83.79 92.41 86.63 77.70 83.18 7/28/2009 22:30 83.43 91.79 85.72 77.10 82.27 7/28/2009 23:00 83.60 91.74 86.16 77.92 83.49 7/28/2009 23:30 83.68 92.18 86.40 77.75 83.36

7/29/2009 0:00 83.48 91.94 86.39 77.91 83.79 7/29/2009 0:30 84.03 92.29 86.84 78.23 83.66 7/29/2009 1:00 83.56 92.25 86.85 78.29 83.61 7/29/2009 1:30 83.97 92.41 86.97 78.11 83.65 7/29/2009 2:00 83.55 91.95 86.86 77.89 83.58 7/29/2009 2:30 83.85 92.25 86.98 78.13 83.84 7/29/2009 3:00 84.17 92.45 86.81 78.00 83.63 7/29/2009 3:30 84.20 92.29 86.86 78.81 84.23 7/29/2009 4:00 83.79 92.02 86.60 78.29 84.00 7/29/2009 4:30 83.90 92.25 86.79 78.46 83.70 7/29/2009 5:00 83.88 92.66 87.10 78.50 84.13 7/29/2009 5:30 83.81 92.63 86.90 78.66 84.68 7/29/2009 6:00 84.49 92.56 86.82 79.04 84.97

# Furnace 12 Stack Testing

Combustion Zone T emperature (F) Gas Row

. niefn 07/29/09 10:00 244 2301 140 07/29/09 11:00 241 2299 135 07/29/09 12:00 240 2300 135 07/29/09 13:00 238 2302 133 07/29/09 14:00 237 2297 133 07/29/09 15:00 237 2300 132 07/29/09 16:00 235 2303 132 07/29/09 17:00 243 2299 133 07/29/09 18:00 245 2299 134 07/29/09 19:00 246 2301 133 07/29/09 20:00 246 2301 134 07/29/09 21:00 246 2300 134 07/29/09 22:00 245 2301 133 07/29/09 23:00 245 2301 133 07/30/09 00:00 245 2301 133 07/30/09 01:00 245 2301 134 07/30/09 02:00 247 2302 133 07/30/09 03:00 250 2304 133 07/30/09 04:00 250 2297 135 07/30/09 05:00 251 2299 135 07/30/09 06:00 252 2300 134 07/30/09 07:00 255 2303 135 07/30/09 08:00 249 2302 135 07/30/09 09:00 249 2301 135 07/30/09 10:00 250 2296 134 07/30/09 11:00 249 2295 134 07/30/09 12:00 249 2298 133 07/30/09 13:00 249 2297 133 07/30/09 14:00 252 2301 135 07/30/09 15:00 253 2299 135 07/30/09 16:00 250 2299 135 07/30/09 17:00 248 2301 135

### Fce 12 NOx

Timestam p 1201 CEMS Flow 1202 CEMS Flow 1203 CEMS Flow 1204 CEMS Flow 1205 CEMS Flow

7/29/2009 9:00 78.29 74.07 83.89 79.61 81.22 7/29/2009 9:30 78.10 73.97 83.84 79.27 80.38 7/29/2009 10:00 77.78 73.44 83.21 79.13 80.63 7/29/2009 10:30 77.88 73.34 83.36 79.24 80.55 7/29/2009 11:00 77.76 73.34 83.13 78.66 79.85 7/29/2009 11:30 77.57 73.27 83.25 78.69 79.98 7/29/2009 12:00 77.80 73.61 83.41 78.35 79.64 7/29/2009 12:30 77.81 73.59 83.13 78.24 79.47 7/29/2009 13:00 77.61 73.39 83.08 78.87 80.22 7/29/2009 13:30 77.94 73.29 82.72 78.48 79.35 7/29/2009 14:00 78.02 73.27 82.93 79.28 80.29 7/29/2009 14:30 77.56 73.04 83.17 78.40 79.76 7/29/2009 77.29 73.26 82.88 78.24 79.25 7/29/2009 15:30 77.55 73.41 83.37 78.56 79.75 7/29/2009 16:00 77.60 73.66 83.52 78.13 79.32 7/29/2009 16:30 77.79 73.23 82.92 78.43 79.74 7/29/2009 17:00 77.58 73.68 83.29 78.75 79.88 7/29/2009 17:30 77.73 73.56 83.26 78.39 79.43 7/29/2009 18:00 77.11 73.50 83.10 78.89 80.35 7/29/2009 18:30 77.80 73.71 83.52 78.87 79.58 7/29/2009 19:00 77.66 73.02 83.17 78.90 79,90 7/29/2009 19:30 78.00 73.80 83.07 78.90 79.86 7/29/2009 20:00 78.02 73.44 83.03 78.40 79.22 7/29/2009 20:30 77.65 73.15 82.81 79.00 80.00 7/29/2009 21:00 77.75 73.49 83.24 78.43 79.86 7/29/2009 21:30 77.50 73.43 82.98 78.89 79.97 7/29/2009 22:00 77.81 73.71 83.06 79.24 80.09 7/29/2009 22:30 78.09 73.43 83.18 78.78 79.65 7/29/2009 23:00 77.79 73.53 82.81 79.31 80.36 7/29/2009 23:30 77.88 73.82 83.05 79.21 79.77

7/30/2009 0:00 77.99 73.71 83.19 79.41 79.88 7/30/2009 0:30 77.62 73.75 83.17 79.24 80.14 7/30/2009 1:00 78.06 73.60 83.14 78.65 79.68 7/30/2009 1:30 77.71 73.43 83,24 79.61 80.39 7/30/2009 2:00 78.24 73.92 83.14 79.68 80.61 7/30/2009 2:30 77.82 73.37 83.10 80.09 81.03 7/30/2009 3:00 75.48 71.57 80.70 80.08 81.30 7/30/2009 3:30 78.12 73.97 83.65 77.40 78.05 7/30/2009 4:00 78.28 73.98 83.25 80.53 81.64 7/30/2009 4:30 77.94 74.05 83.36 79.92 80.91 7/30/2009 5:00 77.82 73.49 83.51 80.36 81.07 7/30/2009 5:30 78.29 73.76 83.62 80.03 81.04 7/30/2009 6:00 78.05 73.48 83.17 79.72 81.03 7/30/2009 6:30 77.93 73.66 83.75 80.94 81.68 7/30/2009 7:00 77.96 73.65 83.65 80.17 80.87 7/30/2009 7:30 77.99 74.07 83.40 79.97 81.06

### 7/30/2009 8:00 77.94 73.99 83.14 79.65 80.66 7/30/2009 8:30 77.91 73.99 83.29 79.07 80.11 7/30/2009 9:00 77.47 73.84 83.44 79.76 80.94 7/30/2009 9:30 77.99 73.77 82.94 79.46 80.53 7/30/2009 10:00 77.86 73.53 82.62 79.78 80.26 7/30/2009 10:30 77.92 73.84 83.10 79.44 80.79 7/30/2009 11:00 77.62 73.33 82.63 79.08 80.12 7/30/2009 11:30 77.81 73.51 83.45 80.23 80.89 7/30/2009 12:00 78.19 73.80 83.07 80.37 80.85 7/30/2009 12:30 78.15 73.49 83.48 80.33 81,14 7/30/2009 13:00 78.27 73.90 83.33 80.42 81.36 7/30/2009 13:30 78.14 73.75 83.04 80.09 80.92 7/30/2009 14:00 78.55 74.15 83.49 80.93 81.89 7/30/2009 14:30 78.30 74.06 83.27 80.11 81.47 7/30/2009 78.11 73.42 82.99 79.61 81.22 7/30/2009 15:30 78.02 73.84 83.59 79.76 80.72 7/30/2009 16:00 77.84 73.70 82,95 78.82 79.61 7/30/2009 16:30 77.94 73.64 82.95 79.53 80.79 7/30/2009 17:00 78.25 73.96 83.37 79.12 80.05

# Appendix F

Stack Test Plan

### PART II: Testing Requirements


### The tables below gives a summary of the pollutants to be tested and test methods. Title V Testin

Source Description Stack Vent and Other Associated Nos. Pollutant Tested and Applicable Emission Limit Limitation Basis of Pollutant Tested Specific Methods/Procedures Required Citation



### Power Boilers S02: 2.5 lb/MMBtu (1

- hr average) 

### Title I Condition: 40 CFR Section 52.21(k); Minn. R. 7007.3000

And
Minn. R. 7011.0510, subp.

1 (also applies) 40 CFR Part 60, Appendix A

EPA Methods 1-4 Method 6 or 6C: 3 1-hr runs 

### (GP001)

Test one stack from the pool of GP001 on a rotating basis.

Which includes stack vents (SV001-002)

SV001 will be tested.



### Dry Cobbing and TPM: 0.0052 grains/dscf PM io: 0.0052 grains/dscf

and MN R. limits in 7011.0730 and 7011.0735 apply 

### Title I Condition: 40 CFR Section 52.21(k); Minn. R. 7007.3000

And


### Minn, R. 7011.0710, subp.

1.A (also applies) 

### 40 CFR Part 60, Appendix A and 40 

### CFR Part 51, Appendix M



### EPA Methods 1

- 

### 4 (ambient 02/CO2) Method 5: 3 2-hr runs (>32 dscf) 

### Method 202: 3 2-hr runs in conjunction with Method 5 

### Conveying (GP007)

Test one stack from the pool of GP007

Which includes stack vents (SV021-025)

SV022 will be tested.
(also being tested for MACT) 

### Furnace Discharge of TPM: 0.011 grains/dscf 

### Mi lo : 0.011 grains/dscf

and MN R. limits in 7011.0730 and 7011.0735 apply 

### Title I Condition; 40 CFR Section 52.21(k), and 

# co for EU011 and EUO20 

### BACT Limits; Minn. R. 7007.3000

And

Minn. R. 7011.0610, suhll

1.A (also applies) 

### 40 CFR Part 60, Appendix A and 40 CFR Part 51, Appendix M

EPA Methods 1

- 

### 4 (ambient 02/CO2) Method 5: 3 1-hr runs (?..32 dscf) Method 202: 3 1-hr runs in conjunction with Method 5 

### Finished Pellets (GP015)

Test one stack from the pool of GP015, except for SV269.

Which includes stack vents (SV120-121, SV265, SV269)

SV121 will be tested.

Northshore Mining Company Page 2 of 10

### Source Description 

### Stack Vent and Other Associated Nos. Pollutant Tested and Applicable Emission Limit Limitation Basis of Pollutant Tested Specific Methods/Procedures Required Citation



### Pellet Screening SV097 Limit: TPM: 0.0063 grains/dscf PM10: 0.0063 grains/dscf

SV122-124 Limit: TPM: 0.011 grains/dscf PM10: 0.011 grains/dscf

SV125 Limit: TPM: 0.015 grains/dscf 

### Pm io : 0.015 grains/dscf

and
PM: 0.022 grains/dscf also applies to all Title I Condition: 40 CFR Section 52.21(k); Minn. 

### R. 7007.3000

And

40 CFR 60.382(a)(1); Minn. R. 7011.2700 

### (also applies) 

### 40 CFR Part 60, Appendix A and 40 CFR Part 51, Appendix M
EPA Methods 1-4 (ambient 02/CO2) Method 5: 3 1-hr runs (?_32 dscf) Method 202: 3 1-hr runs in conjunction with Method 5 

### (GP016)

Test all stacks from the pool of GP016.

Which includes stack vents (SV097, SV122- 125)

All five stacks will be tested.

MACT Testin Source Description 

### Affected Source Category, Air

Permit Group Numbers and Stack Vent 

### Nos. Applicable Particulate Emission Limit Limitation Basis of Pollutant

Tested Specific Methods/Procedures Required Citation



### Affected Source Cat.: Ore PM 0.008 : 

### TABLE 1 TO 40 CFR Part 60, Appendix A 

### Crushing and Handling Emission Units grains/dscf 

### SUBPART RRRRR OF 40 CFR PART 63 

### EPA Methods 1-4 (ambient 02/CO2) 

### GP006 Crushed Ore Conveying Method 5: 3 2-hr runs (>32 dscf) (SV015-016)

. Test one stack from this pool. SV016 — Crushed Ore Conveyor - East will be tested
GP007 Dry Cobbing and Conveying (SV021-025) Test one stack from this pool. SV022 — Dry Cobber — East will be tested (This is also being tested for Title V)
GP008 Coarse Tails Handling (SV026-029) Test one stack from this pool. SV027 — Tails Belts will be tested

0P009 Concentrator Bins — W or E (SV030-031) Test one stack from this pool. SV030 — West Transfer Bin will be tested

Northshore Mining Company Page 3 of 10

### Source Description 

### Affected Source Category, Air

Permit Group Numbers and Stack Vent Nos. Applicable Particulate Emission Limit Limitation Basis of Pollutant

Tested Specific Methods/Procedures Required Citation

Affected Source Cat.: Straight PM: 0.01 TABLE 1 TO 40 

### CFR Part 60, Appendix A Grate Indurating Furnace grains/dscf SUBPART RRRRR 

### Processing Magnetite OF 40 CFR PART 63 

### EPA Methods 1-4 (ambient 02/CO2) GPO 14 Pellet Indurating Furnaces Method 5: 3 2-hr runs (>32 dscf) (SV101-105 [Line 11], SV111-115 [Line 12], SV261-263 [Line 6], SV266-268 [Line 5])
Five stacks from Line 11 will be tested. 

### SV101-103 Furnace 11 Hood Exhausts SV104-105 Furnace 11 Waste Gas
Five stacks from Line 12 will be tested. SV111-113 

### Furnace 12 Hood Exhausts SV114-115 Furnace 12 Waste Gas 

## Testing for Administrative Order Regarding Regional Haze Source Description 

### Stack Vent and Other Associated Nos. Specific Methods/Procedures Required Citation

Indurating Furnaces 11 and 12 Methods Modified from 40 CFR Part 60, Appendix A
Method 1: single point sampling Method 2: use continuous airflow monitor results Method 3A: not needed for use with airflow monitor results Method 4: stacks are saturated, use average stack temperature to calculate moisture content Method 7E: 30 1-hr averages determined Continuous airflow monitors are installed on all three Hood Exhausts and the two Waste Gas Stacks for each Furnace Line. Airflow rates will be verified at all of these stacks, for both Furnace Lines.

30 hours of NOx emissions will be determined at each Waste Gas stack.

Stacks to be tested 

### SV101-103 Furnace 11 Hood Exhaust (3 stacks) SV104-105 Furnace 11 Waste Gas (2 stacks) SV111-113 Furnace 12 Hood Exhaust (3 stacks) SV114-115 Furnace 12 Waste Gas (2 stacks)

Northshore Mining Company Page 4 of 10

### Part III: Operating Conditions

Parameters that will be monitored during the test include, but are not limited to the following:



### Power Boiler 1 (EU001)
Process Description Power Boiler Unit #1 — Coal fired boiler



### Process Parameters Fuel Use Rate (tons/lir, MMBtu/hr), power output (MW/hr): maximum rate of 50 MW/hr); [Unit will be fired on coal] 

### Control Equipment Fabric Filters (CE001) 

### Control Equipment Parameters Gas stream pressure drop (in. H 2 0)



### Crushed Ore Conveyors
- 

### East (EU016)
Process Description Conveyors moving crushed ore from the crusher building to the east concentrator building


### Process Parameters Throughput Rate, long tons of crushed ore/hr: maximum rate of 1700 ltph ±150 ltph 

### Control Equipment Fabric Filters 

### (CE016) Control Equipment Parameters None Applicable for MACT Test



### Dry Cobber - East (EUO22)
Process Description Dry Cobbing and Conveying



### Process Parameters Throughput Rate, long tons of crushed ore/hr: maximum rate of 1200 ltph ±200 ltph 

### Control Equipment Fabric Filters (CE022) 

### Control Equipment Parameters Gas stream pressure drop (in. H 2 0) Cleaning cycle pulse rate (seconds between pulses)

Northshore Mining Company Page 5 of 10

### Coarse Tails Conveying (EUO27)
Process Description Conveying belts transferring coarse tailings



### Process Parameters Throughput Rate, long tons of coarse tailings/hr: maximum rate of 400 ltph ± 150 ltph 

### Control Equipment Fabric Filters (CE027) 

### Control Equipment Parameters None Applicable for MACT Test



### West Transfer Bin (EUO30)
Process Description Conveying belts transferring crushed ore to the storage bins serving the concentrator sections in the west side of the concentrator building


### Process Parameters Throughput Rate, long tons of crushed ore/hr: maximum rate of 1100 ltph ± 200 ltph 

### Control Equipment Fabric Filters (CE030) 

### Control Equipment Parameters None Applicable for MACT Test



### Hearth Layer (EU097) . Process Description Handling of finished pellets used to make the hearth layer in the Line 11 and Line 12 Furnaces.


### Process Parameters Hearth Layer Feed Rate, long tons of finished pellets/hr: maximum rate of 120 long tons/hr 

### Control Equipment Fabric Filters (CE097) 

### Control Equipment Parameters Gas stream pressure drop (in. H 2 0)



### Furnace 12 Discharge (EU121)
Process Description Finished pellets are discharged from the furnace grate



### Process Parameters Finished Pellet Production Rate, long tons of finished pellets/hr: maximum rate of 250 ltph 

### Control Equipment Wet Scrubber, rod-deck scrubber (CE121) 

### Control Equipment Parameters Gas stream pressure drop (in. H 2 0) Liquid flow rate (gpm)

North shore Mining Company Page 6 of 10

### Finished Pellet Screening (EU122-125) Process Description Screening of the Line 11 and Line 12 finished pellets



### Process Parameters Finished Pellet Production Rate, long tons of finished pellets/hr: maximum rate of 250 ltph per Furnace Line 

### Control Equipment Wet Scrubbers, rod-deck scrubbers (CE122-125) 

### Control Equipment Parameters Gas stream pressure drop (in. H 2 0) Liquid flow rate (gpm)



### Furnace 11 Hood Exhaust #1101, #1102, & #1103 (EU100) and Furnace 11 Waste Gas #1105 & #1104 (EU104) Process Description Straight Grate Indurating Furnace. A second generation furnace manufactured by Arthur G. McKee Company and installed in 1962


### Process Parameters Production Rate — long tons of finished pellets/hr: maximum 250 Itph Natural Gas Fuel Use Rate — cf/hr (x1,000) 

### Control Equipment Wet Wall Electrostatic Precipitators (CE101-105) 

### Control Equipment Parameters Primary amperage (amps): Power will be off for the MACT test Primary voltage (volts): Power will be off for the MACT test Gas temperature (degrees Fahrenheit) Liquid flow rate (gpm)


### Furnace 12 Hood Exhaust #1201, #1202, & #1203 (EU110) and Furnace 12 Waste Gas #1205 & #1204 (EU114) Process Description Straight Grate Indurating Furnace. A second generation furnace manufactured by Arthur G. McKee Company and installed in 1962


### Process Parameters Production Rate — long tons of finished pellets/hr: maximum 250 Itph Natural Gas Fuel Use Rate — cf/hr (x1,000) 

### Control Equipment Wet Wall Electrostatic Precipitators (CE111-115) 

### Control Equipment Parameters Primary amperage (amps): Power will be off for the MACT test Primary voltage (volts): Power will be off for the MACT test Gas temperature (degrees Fahrenheit) Liquid flow rate (gpm)

Northshore Mining Company Page 7 of 10

### Part IV: Test Methods All tests 

### will be performed using the following USEPA 

### reference test methods.

Test Method' Method 1 Sample and Velocity Traverses for Stationary Sources. (once at each stack vent for Title V and MACT tests) Method 2 Determination of Stack Gas Velocity and Volumetric Flow Rate. One determination concurrent with each Method 5 sample test run. Method 3 (modified) Determination of Oxygen and Carbon Dioxide Concentrations in Emissions from Stationary Sources. At the non-combustion sources ambient conditions will be assumed (20.9% oxygen and 0.03% carbon dioxide) and 20.9% oxygen will be verified using a portable oxygen analyzer. An integrated bag sample will be collected at the Furnace 11 and 12 MACT tests, and the Power Boiler 1 test. The integrated samples will be analyzed using an oxygen and carbon monoxide analyzer calibrated following EPA Method 3A analyzer calibration procedures. Method 4 Determination of Moisture Content in Stack Gases. One determination concurrent with each Method 5 and Method 6 test run. Method 5 Determination of particulate matter.

For each Title V test, three runs per test with a sampling time equal to or greater than 60 minutes per run and a sample volume greater than or equal to 32 dry standard cubic feet. All filterable particulate matter will be assumed to be PMio.
For each MACT test, three runs per test with a sampling time equal to or greater than 120 minutes per run and a sample volume greater than or equal to 32 dry standard cubic feet. Method 202 Determination of condensible particulate matter. Used in the determination of TPM and PK ° (for Title V testing). Method 6 or 6C Determination of sulfur dioxide concentrations. Three runs per test with a sampling time equal to or greater than 60 minutes per run. All test methods are found in 40 CFR Part 60 Appendix A and 40 CRF Part 60 Appendix M with modifications listed above.



### Test Methods for NOx Testing on the Waste Gas Stacks (30-hrs) Modified Method 1 One sample point will be used to collect the gas sample for NOx and 02/CO2 analysis.

Airflow Rate The airflow rate monitors that are in stalled on the stacks will be used to obtain the airflow rates of each stack. These results will be corrected for the saturated moisture content of the stack to determine the dry standard airflow rate.
If the airflow rate monitors are not available during the time of the NOx testing, the the following procedures will be used. An "S" type pitot tube fixed at a representative single point in each stack. A full traverse of the stack will be recorded (once at each stack vent) and a correction factor will be made based on the average differential pressure readings from the full traverse to correct any bias from the single point readings. Differential pressure recorded with one minute and one hour averages in inches of water. (30 1-hr data points for each stack vent) Stack temperature using a type K thermocouple, recorded with one minute and one hour averages in F. (30 1-hr data points for each stack vent) Modified Determination of Moisture Content in Stack Gases. Wet bulb/dry bulb readings will be

Northshore Mining Company Page 8 of 10

### Test Methods for NOx Testing on the Waste Gas Stacks (30-hrs) Method 4 taken to verify saturated stack conditions. Further moisture calculations will assume saturation at the average stack temperature. Method 7E Determination of Oxides of Nitrogen Emissions from Stationary Sources. The measurement of NOx concentration will be performed at each of the Waste Gas stacks and will be performed following Modified EPA Method 7E and CEM guidelines. The method performance will be modified by collecting data over 30 hours of representative plant operation. Chemiluminescent NO/NO„ analyzers will be used to determine NOx concentrations on a dry basis. All analyzers will be calibrated initially for linearity and the NO 2 converter efficiency check will be conducted with a NIST traceable NO2 in N2 

### balance calibration gas. Daily system bias calibrations with zero and span calibration gases. All Method 7E calibration criteria will be met except that a system bias of up 7.5% of span will be used for the upper limit of acceptability for data validating. If the bias calibration results are greater than 5% the analyzer will be recalibrated for linearity and system bias will be checked again. A span range of -250 ppm is expected for the Waste Gas stacks. • Following GEM data guidelines any one hour data point is considered valid if 45 minutes of data during that hour is valid, the average of the valid data will be used for that hour's average. Therefore calibration time completed within 15 minutes/system will result in no data loss time. Data will be used like OEM data. No bias correction will be done to the raw concentration recordings.

Verification of the Continuous Airflow Rate Monitors Method 1 Velocity Traverses for Stationary Sources. Method 2 Determination of Stack Gas Velocity and Volumetric Flow Rate. One determination will be made and then compared with the Airflow Rate Monitor results for the same time period. Necessary the Airflow Monitor will be recalibrated and this procedure will be repeated until the Airflow Rate Monitor results are within ±10% of the reference method results.

Method 3 (modified) Determination of Oxygen and Carbon Dioxide Concentrations in Emissions from Stationary Sources. An integrated bag sample will be collected and analyzed using an oxygen and carbon monoxide analyzer calibrated following EPA Method 3A analyzer calibration procedures. Modified Method 4 Determination of Moisture Content in Stack Gases. Wet bulb/dry bulb readings will be taken to verify saturated stack conditions. Further moisture calculations will assume saturation at the average stack temperature.

Part 

## V: Continuous Emissions Monitors There are no 

### continuous emissions monitors that are germane to this test.

Part VI: Other

The 

### emissions will be reported in units of the applicable emissions standards. Separate reports will be generated for tests that are conducted for similar purposes.

Northshore Mining Company Page 9 of 10

### Testing schedule: Week 

### of July 27, 2009

Mobilization Description

July 28 th to August 4 th , 2009 Verification of Furnace 11 and 12 Airflow Rate Monitors Furnace 11 and 12 MACT Testing Furnace 11 and 12 Waste Gas NOx Testing
August 1 1 th to August 20, 2009 Title V Testing Remaining MACT Testing
Additional Mobilization (Date TBD) Any testing that could not be completed during the other two mobilizations

Note: Scheduled testing order may change depending on process operating schedule.



### This test plan serves as the official request for performance audit material from the responsible enforcement authority. If audit samples are provided, they will be analyzed during the performance test.


### A copy of each report will be submitted within 45-days after the completion of the last test and a pdf copy of the complete report will be submitted on a CD within 105-days after the completion of the last test.

Maintenance: A description of any necessary work done within 30 days prior to the test and outside the normal maintenance schedule will be included in the test report.
Test plans and report submittals will be addressed to:

Andrew Place Performance Test Coordinator Compliance and Enforcement Section—Industrial Division Minnesota Pollution Control Agency 520 Lafayette Road St. Paul, MN 55155-4194

Closing RemarksIf there are questions or comments about the information provided, please contact me by telephone or email.

Jennifer Ramsdell Environmental Engineer Northshore Mining Company

Northshore Mining Company Page 10 of 10

## Minnesota Pollution Control Agency 520 Lafayette Road St. Paul, MN 55155-4194 

# Air Performance Test Form
Performance Test Plan Approval



## Facility Information (please print)

Facility name: 

### Northshore Mining Company AQ#: 

### 27A Facility contact: 

### Ms. Jennifer Ramsdell, Environmental Engineer
Address: 

### 10 Outer Drive, Silver Bay, MN 55614
Phone: 

### (218) 226-6231 Power Boilers (GP001/ SV001 to be tested), Dry Cobbing and Conveying (GP007/SV022 to be tested), Furnace Discharge of Finished Pellet (GP015/SV121 to be tested), and Pellet Screening (GP016/all stacks to be tested) for Title V. Crushed Ore Conveyor (SV016), Dry Cobber (SV022), Tail Belts (SV027), and West Transfer Bin (SV030) for MACT. Pellet Indurating Furnaces 11 and 12 Waste Gas Stacks (GP014/SV104, Unit(s) to be tested: 

### SV105, SV114, and SV115 to be tested) for NOx relating to the Regional Haze Administrative Order
Scheduled for: 

### Starting July 28, 2009 at your facility located in: 

### Silver Bay, Minnesota.



## Test Plan

Submitted on (date): 

### July 20, 2009 Discussed on (date): 

### July 23, 2009


### Your test plan has been approved by the Minnesota Pollution Control Agency (MPCA) as follows:

O Shortened test notification approved O Test plan approved without modification 

## EJ Test plan approved with the following provisions:

1. MACT testing is not being completed to meet ongoing test requirements. At this time, units are not being completed for corrective action purposes.

2. For MACT testing, provide explanation as to how results are expected to be used and units that will be represented by the test along with the report. Unless explained, it will be presumed that the test results are representative of the tested unit only.

3. NOx test will be completed on Furnace Waste Gas Stacks only. Airflow will be verified on all stacks. Airflow monitors will be certified prior to test according to procedures outlined in test plan

4. Modified Method 3/3A using a calibrated 02/CO2 analyzer shall be used to verify continuous airflow monitors operation.

5. Record and report greenball, fired pellet, and fuel usage data during the NOx test as well as during all other tests where appropriate.

6. Please be reminded all periods indicating noncompliance with emission limits must be reported to the MPCA. This includes any periods of engineering tests. Operating at a rate other than that required by the current air permit must also be reported. Deviations ultimately need to be reported on the facility's semiannual deviation and annual compliance certification forms.

7. Label on CD copy should include: Facility Name, AQ File No., Emission Unit Designator, and Test Date.



## Attached Forms El Operating Data Summary — Combustion Sources 0 Operating Data Summary — Waste Combustors 

## El Operating Data Summary — Process Sources 

# •

Operating Data Summary — Asphalt Plants Z Certifications Form Microfiche/CD-ROM Submittal Form 

## El Performance Test Report Completeness Criteria Note: Forms are also available at www.pca.state.mn.us/air/performancetest.html

aq-f6-08 5/1/07 Page 1 of 2

## Approved by:

Date: July 27, 2009 Andrew Place, Pollution Control Specialist Compliance and Enforcement Unit Minnesota Pollution Control Agency Please contact me at 651-757-2652 if you have any questions regarding this approval. Please be aware that enforcement action will be taken for performance test failures indicating emissions above applicable limits (excess actual emissions to the environment). Failures commonly result in assessment of a monetary penalty. Upon the first test failure, the Company should take immediate measures to minimize emissions. The measures taken should be documented, as they will become part of the record of corrective actions. Hard Copy Performance Test Reports and Microfiche or CD Copy submittals will be addressed to: Air Quality Compliance Tracking Coordinator Minnesota Pollution Control Agency 520 Lafayette Road North St. Paul, Minnesota 55155-4194 cc: Mark Petersen, Barr Engineering Company (email) Bob Beresford, MPCA (email)

aq-f6-08 5/1/07 Page 2 of 2

## Message Page 1 of 1

Mark Petersen

From: Place, Andrew [Andrew.Place@state.mn.us ] Sent: Monday, July 27, 2009 4:12 PM To: Ramsdell, Jennifer Cc: Mark Petersen; Beresford, Robert Subject: Test Plan Approval Attachments: Northshore, Multiple Tests, 7-09.doc; TEST REPORT MICROFICHE SUBMITTAL.doc; Operating Data Summary for Combustion Sources.doc; Operating Data Summary for Process Sources.doc; PTRCC.doc; TEST REPORT CERTIFICATION.doc

Jennifer,
The test plan approval forms associated with the upcoming performance test(s) are included with this message.
Use the Performance Test Report Completeness Criteria form to review the test report prior to submitting it to the agency. The form was designed to help ensure completeness of test reports and aid in efficient MPCA report review and compliance determination. It may be helpful to review the PTRCC prior to the test date in order to be prepared for supplying all the needed information to the test company on the day of the test. This will aid the test company in compiling a complete test report.
If you have problems with any of the attachments feel free to contact me. Additional forms are provided at www. pca. state. mn . uslair/performancetest.html
Sincerely,
Andy Place Performance Test Coordinator Minnesota Pollution Control Agency 520 Lafayette Road St. Paul, MN 55155-4194 (651) 757-2652
Andy Place Performance Test Coordinator Minnesota Pollution Control Agency 520 Lafayette Road St. Paul, MN 55155-4194 651-757-2652



## 11/6/2009

# Appendix G

Project Participants

# Project Participants

Northshore Mining Company
Scott Gischia — Section Manager, Environmental Services
Jennifer Ramsdell — Environmental Engineer

Minnesota Pollution Control Agency

Andrew Place — Performance Test Coordinator

Bob Beresford — MPCA Duluth

Steve Palzkill — MPCA Duluth

Barr Engineering Company
George Pruchnofski — Vice President

Mark Petersen — Project Manager/Air Quality Technician

Tom Leier — Air Quality Technician

Tom Kuchinski — Sr. Air Quality Technician

(Primary contact information can be found in the test plan located in Appendix F)