# Results of the December 20-21, 2000 Nitrogen Oxides Engineering Tests on the Furnace 12 Waste Gas Stack and Hood Exhaust (1203 and 1205) and Furnace 6 Hood Exhaust/Waste Gas Stack (602) at the Northshore Mining Company E. W. Davis Works Facility Located in Silver Bay, Minnesota
MPCA AQD File No. 27A-0T-1
Barr Project No. 2338065TMR003
Prepared for Northshore Mining Company Silver Bay, Minnesota

February 2001

4700 West 77th Street Minneapolis, MN 55435 Phone: (612) 832-2600 Fax: (612) 832-2601 

# BARRNorthshore Mining Company Barr Engineering Co. Silver Bay, Minnesota January 24, 2001

Furnace 6 Hood Exhaust / Waste Gas Stack 602
Determination of Volumetric Airflow Rate, Gas Composition and Moisture Content
Data Entry Symbol Units Run 1 Run 2 Run 3 Test Date - - 12/21/00 12/21/00 12/21/00 Test Period - 1200 1330 1445 Number of Sample Ports - - 2 2 Number of Traverse Points - - 24 24 24 Duct Dimensions (diameter for circular duct) D inches 71.5 71.5 71.5 Barometric Pressure Pbar in. Hg 29.15 29.15 29.15 Stack Static Pressure Pg in. H20 0.45 0.37 0.45 Average Stack Temperature, dry bulb Tsf degrees F 121 120 120 Actual Dry Gas Meter Volume Vm cubic feet 45.91 46.16 46.35 Dry Gas Meter Calibration Factor Y - 1.0000 1.0000 1.0000 Average Meter Temperature Tmf degrees F 61.4 72.3 73.9 Pitot Tube Coefficient Cp

. - 0.840 0.840 0.840 Average Square Root of Velocity Head (DP)^0.5 - 0.715 0.725' 0.717 Collected Moisture Volume V ml 123 121 119 Orsat Results, Dry Basis Carbon Dioxide %CO2 %v/v. 0.9 0 : 9 * 0.9 Oxygen %02 %v/v 18.6 18.6 18.6 Carbon Monoxide + Nitrogen

_ %v/v 80.5 80.5 80.5

Calculated Data Symbol Units Run 1 Run 2 Run 3 Average Absolute Stack Temperature (R) Tsr = Tsf +460 Tsr degrees R 581 580 580

Duct Area A = (D/24)^2 x PI (Circular Duct) A sq ft 27.88 27.88 27.88

Stack Pressure Ps = Pbar + Pg/13.6 Ps in Hg 29.18 29.18 29.18

Meter Volume at Standard Conditions Vmstd = 17.64 x Vm x Y x ((Pbar +(DH/13.6))/Tmr) Vmstd cubic feet 45.48 44.79 44.84

Average Moisture Content of Stack Gas MC = ((.04707 x V)/((.04707 x V) + Vmstd))) x 100 MC % Vol 11.3 11.3 11.1

Molecular Weight of Stack Gas, dry Md = (0.44 x (%CO2))+(0.32 x (%02))+(0.28 x (%N2+%C0)) Md lb/lbmol - 28.89 28.89 28.89

Molecular Weight of Stack Gas, wet Ms = Md x (1-(MC/100))+18 x (MC/100) Ms lb/lbmol 27.66 27.66 27.68

Average Stack Gas Velocity Vs = 85.49 x Cp x (DP)^0.5 x ((TsrOs x Ms))^.5) Vs ft/sec 43.58 44.15 43.64

Actual Volumetric Flowrate Qa = 60 x Vs x A Qa acfm 72,901 73,855 73,004

Volumetric Flowrate at Standard Conditions Qs = Qa x (528/(Ts+460)) x (Ps/29.92) Qs scfm 64,619 65,564 64,822
Dry Volumetric Flowrate at Standard Conditions Qd = Qa x (1-(MC/100)) x (528/(Ts+460)) x (Ps/29.92) Qd dscfm 57,322 58,168 57,623

## Northshore Mining Company- E.W Davis Works Silver Bay, Minnesota Furnace 12 (1203 and 1205) and Furnace 6 (602) 

## NO Engineering Stack Test Report

Table of Contents

Report Certification 1 Executive Summary 2 Introduction 3 Results Summary 4 Process Description 5 Stack Test Procedures and Methods 6

List of Tables
Table 1 Furnace 12 Waste Gas Stack 1205 - Reference Method Analyzer Results Summary Table 2 Furnace 12 Hood Exhaust Stack 1203 - Reference Method Analyzer Results Summary Table 3 Furnace 6 Hood Exhaust/Waste Gas Stack 602 - Reference Method Analyzer Results Summary Table 4 Process Operating Data Summary

List of Figures
Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Furnace 12 Waste Gas Stack 1205 - Test Port Location Furnace 12 Hood Exhaust Stack 1203 - Test Port Location Furnace 6 Hood Exhaust/Waste Gas Stack 602 - Test Port Location Furnace 12 Waste Gas Stack 1205 - Traverse Point Locations Furnace 12 Hood Exhaust Stack 1203 - Traverse Point Locations Furnace 6 Hood Exhaust/Waste Gas Stack 602 - Traverse Point Locations

List of Appendices
Appendix A Appendix B Appendix C Appendix D Appendix E Appendix F Appendix G Appendix H Report Calculations Field Data Sheets Instrument Output Calibration Data Cylinder Gas Certifications Process Operating Data Stack Test Plan Project Participants

### CERTIFICATIONS REQUIRED FOR PERFORMANCE TEST REPORTS FOR June 1999
NOTE: All performance test reports must contain a certification by the responsible parties that the test results have been reported accurately, that the field data is a true representation of the sampling procedures, and that the process data is a true indicator of the operating parameters of the emissions unit at the time of the performance test. (Ref Minn. R 7017.2040). Performance test results will not be accepted without certification of the report.

1. Certification of sampling procedures by the team leader of the personnel conducting the 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 excepti. -. are us ed and e plained b-low.' 

## 1„
Signature

Title Printed Name of Person Signing

Date

2. Certification of analytical 

### procedures'by the person responsible for the laboratory analysis of field samples: "I certify under penalty of law that the analytical procedures were performed in accordance with the requirements of the test methods and that the data presented for use in the test report were, to the best of my knowledge and belief, true, accurate, and complete. All exceptions are listed and explained below." c) K'S 

### / 

# 1 S 7(0 c

Signature 

# N/4 Printed Name of Person Signing

Title Date

3. Certification of test report by the senior staff person at the testing company who is responsible for compiling and checking the test report: 

### "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
exce isted and d below." 

## / 1.1 ..C.S / 1 / Signature A Printed Name of Person Signing V , C-2 ° ( ;)17- 6 5 

## e Title Date

4. Certification of test report by owner or operator of the 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 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 and explai d belp."

e.rz , " ■

- 

### r

- 4,4 igna re Printed Name of Person Signing EI4V tre.DIJ.t.V.)-1

- rA .1,46, 4 ,7 -- 1/8/D1 Title Date

This form is to be submitted as part of the performance test report to: North, Metro, or South District, Performance Test Coordinator,. MN Pollution Control Agency, 520 Lafayette ReL, St. Paul, MN 55155-4194. —

# Executive Summary

Barr Engineering Co. performed nitrogen oxides engineering emission tests on the Furnace 12 Waste Gas and Hood Exhaust stacks (1205 and 1203) and the Furnace 6 Waste Gas/Hood Exhaust stack (602) at the Northshore Mining Company — E.W. Davis Works facility located in Silver Bay, Minnesota. The Furnace 12 Waste Gas stack and Hood Exhaust tests were conducted on December 20, 2000. The Furnace 6 Waste Gas/Hood Exhaust stack test was conducted on December 21, 2000. Each emission test included the measurement of nitrogen oxides (NO) concentration and mass emission rate. A summary of the test results (three run averages) is provided below:

Test Parameter Furnace 12 Waste Gas (1205) Furnace 12 Hood Exhaust (1203) Furnace 6 Waste Gas/Hood Exhaust (602)
Test Date 12/20/00 12/20/00 12/21/00 Stack Temperature, °F 142 115 120 Moisture Content, % vol 15,4 10.4 11.2 Gas Composition, % vol Oxygen Carbon Dioxide 17,2 1.7 19.7
0.4 18.6 0.9 Volumetric Air Flow Rate ACFM SCFM
DSCFM 79,600 68,400 57,800 83,000 74,300 66,500 73,300 65,000 57,700 Gaseous Pollutant Concentrations NOx, PPMV dry (bias corrected) 88.7 22.7 32.2 Gaseous Pollutant Emission Rates NOx, lb/hr NOx, lb/MMBTU 36.7 0.28 10.8
0.088 13.3 0.19 Fired Pellet Production Rate, LTPH 222 219 120 Furnace Heat Input, MMBtu/hr 129 124 69

2

# Introduction

Barr Engineering Co. performed nitrogen oxides engineering emission tests on the Furnace 12 Waste Gas and Hood Exhaust stacks (1205 and 1203, respectively) and the Furnace 6 Waste Gas/Hood Exhaust stack (602) at the Northshore Mining Company — E.W. Davis Works facility located in Silver Bay, Minnesota. The tests were conducted on December 20-21, 2000. The purpose of tests was to develop current nitrogen dioxide emission factors. The pelletizing furnaces were fired on natural gas during the performance tests.

Each test consisted of three 60-minute test runs. Test run 1 on the Furnace 12 Hood Exhaust stack 1203 was shortened to 47 minutes due to a process interruption. The electric service to the Wet-Wall Electrostatic Precipitator serving the Furnace 12 Hood Exhaust was interrupted during test runs 2 and 3, which did not notably effect the nitrogen oxides concentration or mass emission rate. Test run 1 on the Furnace 6 Waste Gas/Hood Exhaust stack 602 was conducted in three periods over the course of 80 minutes, due to a brief reduction in furnace tonnage, in order to gather 60 minutes of emissions data for the test run. All other test runs were conducted over a 60-minute test period.

A test team led by Curt Stock of Barr Engineering conducted the emission tests. Scott Gischia of Northshore Mining provided the coordination of the Barr test team with facility operations. A list of project participants is provided in Appendix H.

Stuart Arkley, of the Minnesota Pollution Control Agency (MPCA), approved the stack test plan in correspondence dated December 7, 2000. A copy of the stack test plan and the MPCA approval is located in Appendix G. A representative of the MPCA did not witness the performance tests.

Test results are presented in the following section. Field data along with supporting documentation is located in the appendices.

3

# Results Summary

Table 1 summarizes the NOx emissions test results for the Furnace 12 Waste Gas stack (1205). The nitrogen oxides emission rate averaged 36.7 pounds per hour (lb/hr) at an average dry concentration of 88.7 parts per million by volume (PPMV). Heat input to Furnace 12 averaged 122 million British thermal units per hour (MMBTU/hr) during the test, resulting in a NOx emission rate, as a function of heat input, of 0.28 lb/MMBTU. The fired pellet production rate during the Furnace 12 Waste Gas stack test averaged 222 long tons per hour (LTPH).

Table 2 summarizes the NOx emissions test results for the Furnace 12 Hood Exhaust stack (1203). The nitrogen oxides emission rate averaged 10.8 lb/hr at an average dry concentration of 22.7 PPMV. The heat input to Furnace 12 averaged 124 MMBTU/lir during the test, resulting in a NOx emission rate, as a function of heat input, of 0.088 lb/MMBTU. The fired pellet production rate during the Furnace 12 Hood Exhaust stack test averaged 219 long tons per hour (LTPH).

Table 3 summarizes the NOx emissions test results for the Furnace 6 Waste Gas/Hood Exhaust stack (602). The nitrogen oxides emission rate averaged 13.3 lb/hr at an average dry concentration of 32.2 PPMV. The heat input to Furnace 6 averaged 69 MMBTU/hr during the test, resulting in a NOx emission rate, as a function of heat input, of 0.19 lb/MMBTU. The fired pellet production rate during the Furnace 12 Hood Exhaust stack test averaged 120 long tons per hour (LTPH).

Table 4 summarizes the furnace process operating and fuel consumption rates, and WWESP operating parameters during each performance test.

4

# Process Description

Northshore Mining Company pelletizer's are straight-grate furnaces manufactured by Arthur G. McKee Company. The furnaces have three major operating zones, referred to as the drying zone, firing zone, and the cooling/recoup

zone.

Unfired green balls comprised of iron concentrate and a composite binder of bentonite and organic binder (starch) enter the furnace at the drying zone. Furnaces 11 and 12 utilize a layer of previously fired pellets, which are 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 dried using heat recouped from the furnace. The Line 6 furnace does not incorporate the hearth layer in the pellet firing the process. 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 initiate an exothermic reaction caused by the conversion of magnetite to hematite. Natural gas and oil burners are located in the firing zone to provide heat input. The furnaces were fired on natural gas during the stack tests. The waste gas is exhausted from the firing zone. The fired pellets enter the cooling/recoup zone, where the exothermic reaction of the pellets is completed.

The hood exhaust and waste gas is directed to wet wall electrostatic precipitators (WWESPs) for emissions control. The Furnace 12 waste gas is split evenly between two WWESP's (stacks 1204 and 1205). The Furnace 12 hood exhaust is split between three WWESPs (stacks 1201, 1202, and 1203). The combined exhaust of the Furnace 6 waste gas and hood exhaust is divided between three WWESPs (stacks 601, 602, and 603).

Operating parameters of each furnace and the WWESP that was associated with each test were recorded during each test run. The furnace operating parameters included fuel usage and fired pellet production rate (LTPH). The WWESP recorded operating parameters included water flow rate (gpm), voltage and amperage. A summary of the process operating data is detailed in Table 4. The MPCA summaries for combustion sources, raw process operating and pollution control device operating data and hourly logs of the operating data are provided in Appendix F.

5

# Stack Test Procedures and Methods

Testing was performed from ports meeting EPA Method 1 (40 CFR Part 60, Appendix A) criteria. A 24-point traverse was performed at the test port location for each stack. Sample port locations and traverse point detail are provided in Figures 1-6.

Volumetric airflow determinations were performed in accordance with EPA Method 2 (40 CFR Part 60, Appendix A) using an S-type pitot tube.

Stack gas composition and molecular weight was determined by EPA Method 3A (40 CFR Part 60, Appendix A). Stack gas moisture content was determined by the performance of EPA Method 4 (40 CFR Part 60, Appendix A), in conjunction with the EPA Method 7E performance test.

Nitrogen oxides concentrations were determined in accordance with EPA Method 7E (40 CFR Part 60, Appendix A).

6

# TablesBarr Engineering January 29,2001 Northshore Mining Company Silver Bay, Minnesota


### TABLE 1

FURNACE 12 WASTE GAS STACK 1205 CALIBRATION BIAS CORRECTION OF THE REFERENCE METHOD ANALYZER RESULTS EMISSION RATE AND EMISSION FACTOR CALCULATIONS

RUN 1 0813-0913 12/20/00 RUN 2 0938-1038 12/20/00 RUN 3 1051-1151 12/20/00 NOx PPM Oxygen ok CO2 % NOx PPM Oxygen % CO2 % NOx PPM Oxygen ok CO2 ok Concavg 85.6 16.9 87.8 17.0ci 88.1 16.9 1.7 Zeroinit 1.7 0.1 0.3 0.0 0.7 0.1 0.0 Zerofinai 1.3 0.0 0.7 0.1 0.4 0.1 0.0

Calm 238.0 17.8 94.0 17.7 94.0 17.7 3.0 Calfinal 234.0 17.7Cf 94.0 17.7 93.3 17.7 3.0 Ca 'gas value 240.0 18,0 96.0 18.0 96.0 18.0 3.0

Zeroav g 1.5 0.1 0.5 0.1 0.6 0.1 0.0 Calavg 236.0 17.8 94.0 17.7 93.7 17.7 3.0

Concoiaaoon. 86.1 17.1 1.7 89.6 17.3 1.7 90.3 17.2 1.7 Airflowosono 57,900 57,200 58,400 Emission Rateloihr 35.7 36.7 37.8
Heat InputMMBtu/hr 130 129 129 Emission Factorio/mmto 0.27 0.28 0.29

Conoolasoorr = (Conc avg -Zero avg )*Cal gas vaiod(Calay g -Zeroavg)

CALIBRATION BIAS, CALIBRATION DRIFT AND ZERO DRIFT CALCULATIONS

RUN 1 0813-0913 12/20/00 RUN 2 0938-1038 12/20/00 RUN 3 1051-1151 12/20/00 NOx PPM Oxygen % CO2 % NOx PPM Oxygen ok CO2 ok NOx PPM Oxygen ok CO2 %
Zeroinit 1.7 0.1 0.3 0.0 0.7 0.1PP.Pc..)220 CCC oo o Zerofinai 1.3 0.0 0.7 0.1 0.4 0.1

Cal m 238.0 17.8 94.0 17.7 94,0 17.7 Cal finai 234.0 17.743 94,0 17,7 93.3 17.7 Ca igas value 240.0 18.0 96.0 18.0 96.0 18.0

Zeroav g 1.5 0.1 0.5 0.1 0.6 0.1 Calav g 236.0 17.8 94.0 17.7 93.7 17.7 Analyzer Calibration Range 500 25 10 100 25 10 100 25 10 Analyzer Calibration Response 238.0 18.0 3.0 96.0 18.0 3.0 96.0 18.0 3.0 Analyzer Zero Response 1.4 0.0 0.0 0.1 0.0 0..0 0.1 0.0 0.0 Analyzer Calibration Difference 0.40% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% Analyzer Zero Difference 0.28% 0.00% 0.00% 0.10% 0.00% 0.00% 0.10% 0.00% 0.00% Initial Calibration Bias 0.00% -0.80% 0.00% -2.00% -1.20% 0.00% -2.00% -1.20% 0.00% Final Calibration Bias -0.80% -1.20% 0.00% -2.00% -1.20% 0.00% -2.70% -1.20% 0.00% Initial Zero Bias 0.06% 0.40% 0.00% 0.20% 0.00% 0.00% 0.60% 0.40% 0.00% Final Zero Bias -0.02% 0.00% 0.00% 0.60% 0.40% 0.00% 0.30% 0.40% 0.00% Calibration Drift -0.80% -0.40% 0.00% 0.00% 0.00% 0.00% -0.70% 0.00% 0.00% Zero Drift -0.08% -0.40% 0.00% 0.40% 0.40% 0.00% -0.30% 0.00% 0.00%Northshore Mining Company Barr Engineering Silver Bay, Minnesota January 29,2001



### TABLE 2

FURNACE 12 HOOD EXHAUST 1203 CALIBRATION BIAS CORRECTION OF THE REFERENCE METHOD ANALYZER RESULTS EMISSION RATE AND EMISSION FACTOR CALCULATIONS

RUN 1 1405-1452 12/20/00 RUN 2 1520-1620 12/20/00 RUN 3 1635-1735 12/20/00 NOx PPM Oxygen % CO2 % NOx PPM Oxygen % CO2 % NOx PPM Oxygen % CO2 % Concavg 22.5 19.4 23.2 19,4 22.7 19.4-1-0000000ciciciri(-6oi doiI1
Zero init 0.7 0.1 0.6 0.1 0.8 0.1 Zerofinal 0.6 0.1 0.8 0.1 0.7 0.1

Calinit 44.2 17.7 44.2 17.9 44.4 17.7 Calfinal 44.2 17.90CO 44.4 17.70C) 44.2 17.7 Calgas value 44.7 18.0 44.7 18.0 44.7 18.0

Zeroav g 0.7 0.1 0.7 0.1 0.8 0.1 Cal avg 44.2 17.8 44.3 17.8 44.3 17.7

ConCblJscorr 22.4 19.6 0.4 23.1 19.6 0.4 22.5 19.7 0.4 AirflowoscFm 65,800 67,400 66,400 Emission Rateibnir 10.6 11.1 10.7
Heat I nputMMBtu/hr 112 128 131 Emission Factoribimmt u 0.094 0.087 0.082

COnCblascorr = (COnCavg

- ZOrOavg) * Calgas value/(Calavg

- Zeroavg)

CALIBRATION BIAS, CALIBRATION DRIFT AND ZERO DRIFT CALCULATIONS

RUN 1 1405

- 1452 12/20/00 RUN 2 1520

- 1620 12/20/00 RUN 3 1635

- 1735 12/20/00 NOx PPM Oxygen % CO2 % NOx PPM Oxygen % CO2 % NOx PPM Oxygen % CO2 % Zeroinit 0.7 0.1 0.6 0.1 0.8 0.10000000c:iciriririciri Zerofinal 0.6 0.1 0.8 0.1 0.7 0.1

Calinit 44.2 17.7 44.2 17.9 44.4 17.7 :Calfinal 44.2 17.9oci 44.4 17.7cpoi 44.2 17.7 Calgas value 44.7 18.0 44.7 18.0 44.7 18.0

Zeroavg 0.7 0.1 0.7 0.1 0.8 0.1 Calavg 44.2 17.8 44,3 17.8 44.3 17.7 Analyzer Calibration Range 100 25 10 100 1 25 10 100 25 10 Analyzer Calibration Response 44.8 18.0 3.0 44.8 18.0 3.0 44.8 18.0 3.0 Analyzer Zero Response 0.1 0.0 0.0 0.1 0.0 0.0 0.1 0.0 0.0 Analyzer Calibration Difference -0.10% 0.00% 0.00% -0.10% 0.00% 0.00% -0.10% 0.00% 0.00% Analyzer Zero Difference 0.10% 0.00% 0.00% 0.10% 0.00% 0.00% 0.10% 0.00% 0.00% Initial Calibration Bias -0.60% -1.20% 0.00% -0.60% -0.40% 0.00% -0.40% -1.20% 0.00% Final Calibration Bias -0.60% -0.40% 0.00%

- 0.40% -1.20% 0.00% -0.60% -1.20% 0.00% Initial Zero Bias 0.60% 0.40% 0.00% 0.50% 0.40% 0.00% 0.70% 0.40% 0.00% Final Zero Bias 0.50% 0.40% 0.00% 0,70% 0.40% 0.00% 0.60% 0.40% 0.00% Calibration Drift 0.00% 0.80% 0.00% 0.20% -0.80% 0.00% -0.20% 0.00% 0.00%

, Zero Drift -0.10% 0.00% 1 0.00% 0.20% 0.00% 0.00% -0.10% 0.00% 0.00%Barr Engineering January 29,2001 Northshore Mining Company Silver Bay, Minnesota


### TABLE 3

FURNACE 6 HOOD EXHAUST / WASTE GAS STACK 602 CALIBRATION BIAS CORRECTION OF THE REFERENCE METHOD ANALYZER RESULTS EMISSION RATE AND EMISSION FACTOR CALCULATIONS

RUN 1 1140-1300 12/21/00 RUN 2 1310-1410 12/21/00 RUN 3 1422-1522 12/21/00 NOx PPM Oxygen ok CO2 % NOx PPM Oxygen % CO2 % NOx PPM Oxygen % CO2 % Conoavg 31.2 18.6 1.0 31.7 18.6 1.0 32.3 18.6 1.0 Zerofifit 0.4 0.1 0.1 1 .4 0.2 0.1 1.5 0.2 01 Zerofinal 1.4 0.2 0.1 1.5 0.2 0.1 1.6 0.2 0.1

Calm 43.6 18.0 3.0 43.7 18.0 3.0 43.6 18.0 3.0 Calfinal 43.7 18.0 3.0 43.6 18.0 3.0 43.5 18.0 3.0 Calgas value 44.7 18.0 3.0 44.7 18.0 3.0 44.7 18.0 3.0

Zeroavg 0.9 0.2 0.1 1.5 0.2 0.1 1.6 0.2 0.1 Calavg 43.7 18.0 3.0 43.7 18.0 3.0 43.6 18.0 3.0

ConCblascorr 31.7 18.6 0.9 32.0 18.6 0.9 32.7 18.6 0.9 AirflowDscFm 57,300 58,200 57,600 Emission Rateibmr 13.0 13.4 13.5
Heat InputmmEstu/hr 61 73 72 Emission Factorfiymmatu 0.21 0.18 0.19

COnCblascorr (COrICavg-Zer0„g)*Calgas valud(Calavg

- ZerOavg)

CALIBRATION BIAS, CALIBRATION DRIFT AND ZERO DRIFT CALCULATIONS

RUN 1 1140-1300 12/21/00 RUN 2 1310-1410 12/21/00 RUN 3 1422-1522 12/21/00 NOx PPM Oxygen' % CO2 % NOx PPM Oxygen % CO2 % NOx PPM Oxygen % CO2 % Zero m 0.4 0.1 0.1 1.4 0.2 0.1 1.5 0.2 0.1 Zerofinal 1.4 0.2 0.1 1.5 0.2 0.1 1.6 0.2 0.1

Calfilit 43.6 18.0 3.0 43.7 18.0 3.0 43.6 18.0 3.0 Cal fi n al 43.7 18.0 3.0. 43.6 18.0 3.0 43.5 18.0 3.0 Calgas value 44.7 18.0 3.0 44.7 18.0 3.0 44.7 18.0 3.0

Zeroavg 0.9 0.2 0.1 1.5 0.2 0.1 1.6 0.2 0.1 Calavg 43.7 18.0 3.0 43.7 18.0 3.0 43.6 18.0 3.0 Analyzer Calibration Range 100 25 10 100 25 10 100 25 10 Analyzer Calibration Response 44.5 18.0 3.0 44.5 18.0 3.0 44.5 18.0 3.0 Analyzer Zero Response 0.2 0.0 0.0 0.1 0.0 0.0 0.1 0.0 0.0 Analyzer Calibration Difference 0.20% 0.00% 0.00% 0.20% 0.00% 0.00% 0.20% 0.00% 0.00% Analyzer Zero Difference 0.20% 0.00% 0.00% 0.10% 0.00% 0.00% 0.10% 0.00% 0.00% Initial Calibration Bias -0.90% 0.00% 0.00% -0.80% 0.00% 0.00% -0.90% 0.00% 0.00% Final Calibration Bias -0.80% 0.00% 0.00% -0.90% 0.00% 0.00% -1.00% 0.00% 0.00% Initial Zero Bias ' 0.20% 0.40% 1.00% 1.30% 0.80% 1.00% 1.40% 0.80% 1.00% Final Zero Bias 1.20% 0.80% 1.00% 1.40% 0.80% 1.00% 1.50% 0.80% 1.00% Calibration Drift 0.10% 0.00% 0.00% -0.10% 0.00% 0.00% -0.10% 0.00% 0.00% Zero Drift 1.00% 0.40% 0.00% 0.10% 0.00% 0.00% 0.10% 0.00% 0.00%Start Time End Time Production Rate, LTPH Fuel Input WWESP Data Natural Gas Amperage Voltage Water Flow !Wm Kcfh MMBTU/hr 1405 1452 1520 1620 1635 1735 210 222 225 112 128 131 112 128 131 25 N/A 

# • N/A 4.5 157 N/A 156 N/A 156 I 219 124 124 I 25 4.5 156 Run 1 2 3 Average Northshore Mining Company Barr Engineering Silver Bay, Minnesota January 29, 2001



### TABLE 4

PROCESS OPERATING DATA SUMMARY
FURNACE 12 Waste Gas Stack (1205) - December 20, 2000

Run Start Time End Time Production Rate, LTPH Fuel Input WWESP Data Natural Gas Amperage Voltage Water Flow clPm Kcfh MMBTU/hr 1 2 3 0813 0913 0938 1038 1051 1151 223 222 221 130 129 129 130 129 129 14 19 18 5 149 6 149 6 149 Average 222 

## I 129 129 If 5.7 149
FURNACE 12 Hood Exhaust Stack (1203) - December 20, 2000

FURNACE 6 Waste Gas/Hood Exhaust Stack (602) - December 21, 2000

Start Time End Time Production Rate, LTPH Fuel Input WWESP Data Natural Gas Amperage Voltage Water Flow PPM Kcfh MMBTU/hr 1140 1300 105 61 61 5 1 149 1310 1410 127 73 73 5 1 148 1422 1522 129 72 72 5 1 148 120 I 69 69 5 1.0 148 Run 1 2 3 Average

# Figures

# NORTH SHORE MINING COMPANY
FURNACE 12
WASTE GAS WWESP STACK (SV 1205) TEST PORT LOCATION

-71.5" I.D.



### -8' Two Sample Ports @ 90 Degrees



### Floor

- 12'

Flow

WW ESP

Drawing not to scale. 

### Figure 1 

## BA Engineering Co.

## BA Engineering Co. Drawing not to scale. 

### Figure 2 Two Sample Ports @ 90 Degrees

Floor

12' —8'

Flow

WWESP 

# NORTH SHORE MINING COMPANY
FURNACE 12
HOOD EXHAUST WWESP STACK (SV 1203) TEST PORT LOCATION

—71.5" I.D.

### Two Sample Ports @ 90 Degrees



### — 12'

Flow

WWESP

Drawing not to scale. 

### Figure 3 

## BA Engineering Co. 

# NORTH SHORE MINING COMPANY
FURNACE 6
WASTE GAS / HOOD EXHAUST WVVESP STACK (SV 602) TEST PORT LOCATION

—71.5" I.D.

### 69.98" 66.71" 63.05"

58.83"

53.63"

46.07"

25.43"

17.86"

12.67"

8.45" 4.79" 1.52" 

# TRAVERSE POINT LOCATION

FURNACE 12 Waste Gas WWESP Stack (SV 1205)

North Shore Mining Company



# 24 Traverse Points from 2 Test Ports

BARR Engineering Co. 

## Figure 4 Drawing not to scale.

### 69.98" 66.71" 63.05"

58.83"

53.63"

46.07"

25.43"

17.86"

12.67"

8.45" 4.79" 1.52" 

# TRAVERSE POINT LOCATION

FURNACE 12 Hood Exhaust WWESP Stack (SV 1203)

North Shore Mining Company



# 24 Traverse Points from 2 Test Ports

BARR Engineering Co. 

## Figure 5 Drawing not to scale.

### 69.98" 66.71" 63.05"

58.83"

53.63"

46.07"

25.43"

17.86"

12.67"

8.45" 4.79" 1.52"

. r 

### BA Engineering Co. Drawing not to scale. 

### Figure 6 

# TRAVERSE POINT LOCATION

FURNACE 

# 6 Waste Gas / Hood Exhaust WWESP Stack (SV 602)

North Shore Mining Company



# 24 Traverse Points from 2 Test Ports

# Appendices

# Appendix A
Report CalculationsNorthshore Mining Company Barr Engineering Co. Silver Bay, Minnesota January 24, 2001

Furnace 12 Waste Gas Stack 1205
Determination of Volumetric Airflow Rate, Gas Composition and Moisture Content
Data Entry Symbol Units Run 1 Run 2 Run 3 Test Date - - 12/20/00 12/20/00 12/20/00 Test Period

_ - 845 1015 1115 Number of Sample Ports - - 2 2 2 Number of Traverse Points - 24 24 24 Duct Dimensions (diameter for circular duct) D inches 71.5 71.5 71.5 Barometric Pressure Pbar . in. Hg 29.30 29.30 29.30 Stack Static Pressure Pg in. H20 0.18 0.24 0.37 Average Stack Temperature, dry bulb Tsf degrees F 143 142 142 Actual Dry Gas Meter Volume Vm cubic feet 45.92 45.47 45.82 Dry Gas Meter Calibration Factor Y - 1.0000 1.0000 1.0000 Average Meter Temperature Tmf degrees F 62.7 69.0 71.6 Pitot Tube Coefficient Op - 0.840 0.840 0.840 Average Square Root of Velocity Head (DP)^0.5 - 0.763 0.755 0.772 Collected Moisture Volume V ml 173 173 176 Orsat Results, Dry Basis Carbon Dioxide %CO2 %v/v 1.7 1.7 1.7 Oxygen %02 %v/v 17.1 17.3 17.2 Carbon Monoxide + Nitrogen - %v/v 81.2 81.0 81.1

Calculated Data Symbol Units Run 1 Run 2 Run 3 Average Absolute Stack Temperature (R) Tsr = Tsf +460 Tsr degrees R 603 602 602

Duct Area A = (D/24)^2 x PI (Circular Duct) A sq ft 27.88 27.88 27.88

Stack Pressure Ps = Pbar + Pg/13.6 Ps in Hg 29.31 29.32 29.33

Meter Volume at Standard Conditions Vmstd = 17.64 x Vm x Y x ((Pbar +(DH/13.6))/Tmr) Vmstd cubic feet 45.61 44.62 44.75

Average Moisture Content of Stack Gas MC = ((.04707 k V)/((.04707 x V) + Vmstd))) x 100 MC % Vol 15.1 15.4 15.6

Molecular Weight of Stack Gas, dry Md = (0.44 x (%CO2))+(0.32 x (%02))+(0.28 x (%N2+%C0)) Md lb/lbmol 28.96 28.96 28.96

Molecular Weight of Stack Gas, wet Ms = Md x (1-(MC/100))+18 x (MC/100) Ms lb/Ibmol 27.30 27.27 27.25

Average Stack Gas Velocity Vs = 85.49 x Cp x (DP)^0.5 x ((Tsr/(Ps x Ms))^.5) Vs ft/sec 47.55 47.02 48.14

Actual Volumetric Flowrate Qa= 60 xVsxA Qa acfm 79,543 78,670 80,542

Volumetric Flowrate at Standard Conditions Qs = Qa x (528/(Ts+460)) x (Ps/29.92) Qs scfm 68,237 67,611 69,242
Dry Volumetric Flowrate at Standard Conditions Qd = Qa x (1-(MC/100)) x (528/(Ts+460)) x (Ps/29.92) Qd dscfm 57,899 57,177 58,425Barr Engineering Co. January 24, 2001 Northshore Mining Company Silver Bay, Minnesota

Furnace 12 Hood Exhaust 1203
Determination of Volumetric Airflow Rate, Gas Composition and Moisture Content
Data Entry Symbol Units Run 1 Run 2 Run 3 Test Date - - 12/20/00 12/20/00 12/20/00 Test Period - - 1425 1545 1650 Number of Sample Ports - - 2 2 2 Number of Traverse Points - - 24 24 24 Duct Dimensions (diameter for circular duct) D inches 71.5 71.5 71.5 Barometric Pressure Pbar in. Hg 29.15 29.15 29.15 Stack Static Pressure Pg in. H20 0.48 0.39 0.43 Average Stack Temperature, dry bulb Tsf degrees F 115 115 116 Actual Dry Gas Meter Volume Vm cubic feet 39.34 45.78 45.63 Dry Gas Meter Calibration Factor Y - 1.0000 1.0000 1.0000 Average Meter Temperature Tmf degrees F 52.6 58.6 61.3 P.itot Tube Coefficient Cp 0.840 0.840 0.840 Average Square Root of Velocity Head (DP)^0.5 - 0.809 0.828 0.819 Collected Moisture Volume * V ml 97 111 114 Orsat Results, Dry Basis Carbon Dioxide %CO2 %v/v 0.4 0.4 0.4 Oxygen %02 %v/v 19.6 19.6 19.7 Carbon Monoxide + Nitrogen - %v/v 80.0 80.0 79.9

Calculated Data Symbol Units Run 1 Run 2 Run 3 Average Absolute Stack Temperature (R) Tsr = Tsf + 460 Tsr degrees R 575 575 576

Duct Area A = (D/24)^2 x PI (Circular Duct) A sq ft 27.88 27.88 27.88

Stack Pressure Ps = Pbar + Pg/13.6 Ps in Hg 29.19 29.18 29.18

Meter Volume at Standard Conditions Vmstd = 17.64 x Vm x Y x ((Pbar +(DH/13.6))frmr) Vmstd cubic feet 39.63 45.59 45.20

Average Moisture Content of Stack Gas MC = ((.04707 x V)/((.04707 x V) + Vmstd))) x 100 MC % Vol 10.3 10.3 10.6

Molecular Weight of Stack Gas, dry Md = (0.44 x (%CO2))+(0.32 x (%02))+(0.28 x (%N2+%C0)) Md lb/lbmol 28.85 28.85 28.85

Molecular Weight of Stack Gas, wet Ms = Md x (1-(MC/100))+18 x (MC/100) Ms lb/Ibmol 27.73 27.73 27.70

Average Stack Gas Velocity Vs = 85.49 x Cp x (DP)^0.5 x ((Tsr/(Ps x Ms))^.5) Vs ft/sec 48.98 50.11 49.68

Actual Volumetric Flowrate Qa= 60 xVsxA Qa acfm 81,945 83,833 83,107

Volumetric Flowrate at Standard Conditions Qs = Qa x (528/(Ts+460)) x (Ps/29.92) Qs scfm 73,399 75,073 74,302
Dry Volumetric Flowrate at Standard Conditions Qd = Qa x (1-(MC/100)) x (528/(Ts+460)) x (Ps/29.92) Qd dscfm 65,817 67,354 66,418
* - Moisture volumes were adjusted to calculate the maximum stack gas moisture content. Free moisture was collected.

# Appendix B

Field Data Sheets02 Reading 02 Analyzer No. Integrated Gas Sampling Data: Box No. Leak Rate, cc/min Bag No. Bag Vol. 

### Engineering Company

Project Ai t c , 4 S Sample Location /..;,,t 12. 4.1g)tv 6 , •3 120C Metery 1, 0c

- so Bar. Press. Date /0)(4

- , Test j Run ' 3 Orifice AN @ 1.

- 711.s

- 1 Eff. Probe Length 

## 7 ft Liner Type:El Glass 0 S.S. 

### k

- Other 2d/.3 in Hg Sample Train Leak Rate (cfm) Pretest 

### o.(:) , at 15 in Hg Posttest t•oc

. ) at 1 in Hg D D 

# BA

Sample

Point Sample Time

6, 1 Meter Volume vm, 

## Tr Orifice AI-1, in H20 Sample Volume AVM, tt

Sample Vacuum,

in Hg Stack Sample Train Temperatures, °F Oxygen Content, % Temp. Is, "IProbe Filter lrnpinger

_ Outlet Meter Inlet Meter Outlet
'" ( I ) ( 73c..YI )1...4 1 ‘

. . c.,:z.:: 'Airki;' , 'i'A - -':="

- r - '

-

'1:- .z,• - , .,;;; . - -'-'''"' A

- / 5 - 73 1 1, 2

- R i :15 - 3. S'e) au iy2..._ ivz. 231

z to 

### 7c

- zi V7S - 3.6 ) o "3-0 it./Z.. 1 'Z Z 33 3 

## ir 'null 1 . 

## / r 3.11. 3.O

- 

### "u 3 2y

- 1._ ZVI._
."-(....

- 7 t 6

- :7 7.. I 1( ?-5 . 3 .c, /W 2 4-2... Z3 3
c zc lt/1.5

. , i ,75- 3-SY 1. ( '- )(1 ( G 3 6

. 

### 7 4 - 

### ) .

- 3/ t. 

### 7 C 3.Y

- 3,0 i 5' Z. 25' 7 2:33 Y 7 1 /3 - 

## 7 3r 7c7. 7 

### I i. 7 5 - 1. i 1,— iv( 25-4 233 , (.. )- 

### 7 

## ' 4=

. 2 Lla

- 76 1 .0 L I7 — ) - t ro / 9 ? "22_ "Z 3!) (ci 75? C- .3 VC - 7Cti `&3 i.75: - 3. cy) 3.0 /Ye Zy z

- z 3:5. 

## 7 1 7S C S' 7M 6

- .S ( 75 — 3.7J 3-d 1 ("Z. szct z

- z sy

- 7 V 7 77 2 .sto (-7 i` '3/0 3. c , ty-1 2VZ 7 Ns- '7 

### 7 '7 CV 771 , 3 0 i , 1 5 - 3. t , / c r'7-. 7..t i et 7...) ), - 

## 7 7 5(

_ ( ) (ils

- 3) •

• --,..

CY= Vm= .S1=1"= ''.:,--- ,, 

## .- ,, ,';g1, ,, Ts= 1E4)._ Operators DI 

## Ic 

## EPA METHOD 4 FIELD DATA SHEET

CM 

## 3 sm P Pitot No. IS - CP

Moisture Recovery Data: Impinger 1 2 3 4 Desiccant Total Final wt., g Z z Initial wt., g i 0 i g C /0 Difference 1 z. Z 

## y I G r7 C.= at 15 in Hg

### Engineering Company
Project A)W

. ilk Six,/ c. ;v1; .1) Sample Location t:vid. It IZ osr Date ta201 1 0 , -- Test Run a Operators 

# BA

CM 3 SM P Pitot No. ( S - Cp Sample Train 1..ak Rate (cfm) , Meter y I. cc , :s Bar. Press. 2-1.3 4 = , in Hg Pretest 6.0 , -) at 15 in Hg Orifice 6,1-1 @ i.7•2 / Posttest 

### o .c , ) at'llin Hg Eff. Probe Length ---) ft Liner Type:0 Glass N- S.S. 0 Other 

## EPA METHOD 4 FIELD DATA SHEET

Sample

Point Sample Time

A i Meter Volume vnn, It Orifice AH, in H 2 O Sample Volume Avm, it Sample Vacuum,

in Hg Stack Temp. I s, 'ISample Train Temperatures, °F Oxygen Content, % Probe Filter Impinger Outlet Meter Inlet Meter Outlet 

### ocil'i ) ( GV-T() 

### Ggssy l.

- 7 6 3 - '2. 3L i _5

- . 5 - ly 2. 2 y 3 2 2 i 0 (.,92.3(i i. 73 

### 3. so c. -5 - / V '2_ '2 Y2_ Z323 

### 3 

### i c c,16.1s - t, 7 ,-' 3.7? - (..,0 '3 9 Z V Z- 23'S 4/9 7?. 

### 6 '3 Vick- i

- 1 S - "3_ '74 

### 6- 0 / Yr

- 2y 2_ Z.33 V 7 L 

### 3 c ZS - 7031L1 i. 7S - 3.- '73- 

### 6.e- i V

- 4._ -zyt 1 3 V Y 7 

### 7s , (->(./ '7 5- '3. 1 L 6.d 1 `If "2.Y Z 2.15.. 71 ZS' 1 , 15 - 3-S 4 (...0 i‘13 2 y 2

- 2. 3) Z kiL) I-'75- 1, s3 115 - 0 C-.0 I Pr'

- Z. t f "I_ 2.33 

### 3 vs- 7N.V (.

- 7s -- 3 . 9 ci 

### 6 , 6 )(3 (..( SLI 

### 1

- 2Z ,t, 3 i .7 S -- '3,9(.. 

### C.6 i g 7 z y Z. 2.3, 3 5

- 5- 5 - cc - 72.6-5'1 /. 75' - 3.1Z.. , (- 0 I3 2 yz .2 1 s' s -

- It ( 

### '6 i.c.) '710.31 , '7f (

. ...6 P-1 L 2Y 2. Z 3 c/


### 6049

a= Vm= ATI= Th = I L II Integrated Gas Sampling Data: Moisture Recovery Data: Impinger 1 2 3 4 Desiccant Total Final wt., g z3 y ) Zy /Dv it 3( Initial wt., g I 

### 00 Ito iC b. 

### Iti t_g. Difference 1311 2 L i i t/' 4 t 

### )'73 Box No. Bag No. Bag Vol. Leak Rate, cc/min 02 Reading 02 Analyzer No. at 15 in Hg• •• ■ :,

• 

## Barr EPA METHOD 2 Engineering Company 

### FIELD DATA SHEET

Project NU* ? 1 11

• Sample Location I zi.) 5 % , kp , :s1-.. &' ) Date )4 Operators 

### 6

- 3 k Duct Dimensions 

### 74- inches Port Length inches Pitot Tube No. iç Cp Manometer ID • Bar. ID Digital Therm ID T.C. ID 

### 6Katt -0 Asti Run 1. Run 2 • Run 3 Bar Press (In Hg) VI:3° . 

### 2 13° ?...Li. 30 Stat Press (In Hg) 4 % 6, 

### i si .1.- (.1,•-( 7 , + 0-37 4 

### o,y1 Temp - Dry Bulb °F i 

## y r so vi a • Temp - Wet Bulb °F 

### )96 Pf

. 1 Moist Content -% • 0,, % • . • Time of Meas. DSYS

- • it? ; .5 - 

## II i 6 -

• Pitot

. Leak Check Positive: Negative: ,., • S

Traverse Point information Velocity Head inches H 0 \,__ Stack Temperature - °F

• - • point , Number Inches From: Run 1. AP Run : 2 -., - AP Run 3

. AP i {t 0

..... .L

. 04

• • AP ' Run 1., 1 Temp. Rurf2,, Temp. Run 3. Temp.' : Run 4' Temp. ' Wall Port ' 0,40

- t• : q z 

### Q:31 .6. 

# q -

. . 0 .gfc t),/7. 

## 6: co - 

### 3

,, 

### :413..; .c

. I. 0, q

- 1 . o . <Li

- . b..(,;(9 , 

## t

. .L

. 3 0.- CC> 0. 5

• 

### S`

- 

### ' 0 -.. cy,
- 1Z 0 ;"71 c). - 7 

### y. 0.(or

. • 

### - 73 - o..'. 

## O. ' 6: 71 o . 

## -7 2, 6

. C,1 eJ. 

### 70.. 0 

### ..61, ,,.. 6'.'

.. .6, co.q. ..

. - 3-')

. • o..G

. 2- 0 ..

- C,..6- 

### 01; GI c. C.79

• 9

- .1i.)

. 

## (::.5 r. -d- 5 .- `•• e,, .r1 • 0.3"

. .7

• .1` I ''t)-9 ° 111 6 6 -cl 1 ' 6 ..5

- 0

• 

### • ‘. /7 • . 

## d.g

. o.g.z....0..141.1 • O. VS - • 

### 6

. . -- 3•1

. 0.

- z.:i • (., 

## 3 ei 0• :se(
z
. . 5. 

### LI Z. 

### 4 3 ..... 0-

- Z

. 

### a, • 0 f' c, ii.5 - ot-S

. z ,,,, C-:( . .,... 

### 76 6..73 •

• t, 73' C-7 ( f 

### (:,.. •3 &

. 

## ..7

• 

### ,

• 

### 1 0 , 

## : 7

N • 0 , 1 y 6 , 71 cv -- 7 3 ,.

• t`..7

. 775 - , C.1

. 7 :. L

- .. -IA . 6.11 _
.,. 0,7( • .0,.1 1

.. . . t„)

. I

. ( 6

. 6;7
W

. • • C tj. 6•C:L 

## k. ‘,1 

## 03"-g

. 

### 'it 6.. 

### Go. 

## a .T.c. • D. 

### 4. t 9 ..c Z

. .1), ( 13 4.1. -S

- i /

.. . ch (47 .

IVIWatatita Run 1 Run 2 Rurt,3 Run 4

Stack Pres. - In Ng 1 , Duct Area - Sq FL' Mole Weight : Md Mole Weight - Ms - > Avg. Temp. - °F Average ■ /,0 Gas Vel .:. Ft/Sec ACFM , DSCFM /

, Schematic of Duct Cross-SectionMoisture Recovery Data: Impinger 1 2 3 4 Desiccant Total Final wt., g z al i 2 , ;) , 

### e Gq q e i 0 ' Initial wt., g /b, b /06 Difference ) z 

### 9 z.E, 13 '4.3 173 Integrated Gas Sampling Data: Box No. Bag No. Bag Vol. Leak Rate, cc/min 02 Reading 02 Analyzer No. at 15 in Hg 

# PA EPA METHOD 4 Engineering Company 

## FIELD DATA SHEET

Project 

### Nortli /YLA:A3 

### CM 3 SM P Pitot No. 

### 15 - Cp 

### . Sig Sample Train Leak Rate (cfm) Metery / Wo Bar. Press. 29.36 in Hg Pretest 0 ,.e.)D at 

### 15 in Hg 

### I Orifice EH @ 

### t 7 Z.S7 Posttest (1%. c-- ,0 at 

### 9 in Hg Eff. Probe Length 

### 7 ft Liner Type:111 Glass 11 S.S. El Other

Sample

Point Sample Time

zx i Meter Volume vm, tr Orifice EH, in H 2 0 Sample Volume AVnn, tr Sample Vacuum,

in Hg Stack Sample Train Temperatures, °F Oxygen Content, % - Temp. Is, "I

- - Probe Filter lmpinger Outlet Meter Inlet Meter Outlet (J3 ) ( ( : 3 % 37.' ' ) • - A - - 1;75' '1 

### „3 3,c I Li/ zyL z 3 Ei 

### .7 

### 41

- 3 5

- 1
z at) l i ,t/6 .17 I 7S -- 

### '3,6

. 

## q Y. (

. 3 " I 

### L

- // z 3 r. 2:S 4 1 

### .6

- 3 ç 2. 3 a Ss C S-D. CC- /. 

### "75'" 

### 1 

## g 9 0 i v VI"?' Z 3C, c 1 6; 3 S Z4 / 2 c- (,<LI "Zzi /.

- 7S - 3. / r Y S - i '37 

### vz z I r .2 s -- 6 5715 - r'75

- • 

### s. i'- , '

. 

### y. 5 - Hi* zstz_ zyz. S

- S C. 

### i . '7 r 

### i . '7 5' .- 

### 3.9C tk s -- i LA- - • zY 

### 7 z - 0' (.3 (.-., 

### c(-,, i '7 

## r 3. (or if. S - /4 , 5 - zii z_ 2 -3 1 & 

## i 7/ S - V (.61.3s — I, 7s - 1 . 4) 4 / c -- i 

### vs

- z Y Z. z 3

- z_ 7Z 7 z

- 60 3 v <- 

### G73. IS — / 7s — 1. L-C 

### 't, r /,/ V "2 y7_ z 3 S 7L 7L Co C ‘( V lb 6% , S 1. 

### 7 r - 3 „c1 c L/, C / Y 7_ 

### zyt Z33 "7/ 7Z. (,C. 

### r cs — c,, , I.

-- /s - 1,7 C 1 - c i7 

### 1,/,r ) 'I 

### Y zsiz_ z 33 (:)(sst.:. 

### Z. I- 7s - g- 

### .5 - I 

### Li 2 - 2 .12- 2_33
1 ociirs")

Vm= SI=1-= Ts= P-I5 Tm - ,.. Sample Location (.;,.,c iz wi,4. 6.11 Date I212u I a) Test I Run Operators 

### 671c,Box No. Bag No. Bag Vol. Leak Rate, cc/min 02 Reading 02 Analyzer No. at 15 in Hg 

# BA • EPA METHOD 4 Engineering Company 

## FIELD DATA SHEET

Project 

### A)'' / 1 /;41 

# ■ 1 1_5 CM 

# 3 SM P Pitot No. 

### I Cp Sample Train Leak Rate (cfm) Sample Location 

### ElE4 120? Meter 

### 7 l.c 

### Bar. Press. 2.9./ 

### i,n Hg

• Pretest at 15 in Hg Date 2.) Test 

### Z Run Orifice AH @ - 7 2 s' I 

### Posttest

- . 

### at I_ in Hg Operators 

### fyak f / c s Eff. Probe Length. 

## 7 ft Liner Type:0 Glass 0 S.S. 0 Other

Sample

Point Sample Time

Al Meter Volume VM, tr Orifice AH, in H 2 O Sample Volume AVM, tr Sample

• Vacuum, in Hg Stack Temp.Is, "ISample Train Temperatures, °F Oxygen Content, % Probe Filter Impinger Outlet Meter Inlet Meter Outlet
II - Y .Z

. ) ( ( 6)C c Il ) ' - ''.%',..

. 1 4 -03,:. :1 , . :'..fi ' 7 "

- I' '` ,. ::-.V. .• :!, 7.6:'.::::i:: '''
, ''' ' 

### A - t s - • s *6 7 Gs I .• 

### 1s - 2 .77 1.0 I'S" 2. YZ 2.32_

z ia 57- 3

. 0 0 i 73 - 

### 3- (32- 3 J.) i ic 

### zy - z_ -z3 z... qtp- 5?- s' Z

. i S -- S '17 , Z-1 l . 7 

### 1

- 

### Ts'? 3 ,t) i /S - 2.

- --z - z..3

- ?... Y 7,1 c-1

- 31.1 r" I .7S 3.7ç" 3.) us - " 7

- YZ Z. 3 ••3 .5

- 3 6,3 5 - - .1 s31. cit; i , 7 S e 3, S 7 .-- 3. v

. ? 1 4 -- 2

- Y Z.. 2 3 1 -- 

### ,3

- 7 6 , -( S" 3 

### (.. 53C:lz /.7 -- 

### 3 , 3

- 

### 3 ..5 - j i 5 — Z V Z. 2 .' (.._

- 3 - 

### cc sck 1 

### r VZ.S 5- i 7) 3 - c.c) 

### 3. (--, 1 11 "Z '-/z, z ''S z... cr. , 1 

### il; 5 -- .5

- 5' Z ‘-f& 

### Scit. 3 <3 1, 

### 75 - '3 .1. i 2. 0 1 I 

### r" ai z_ z 3 -7 ---. 3 WC - tSb , 19 /.75" 3 • .- ci 1/ C., 2 Y Z. Z 3 *3 6 6 6 S --- c>"' 5‘4 , 0 '-/' I • 

### 7i — 3. S3 '3 .. 0 1i

- LY L_ Z3) 

### 5

- 7 6.5 — Sr
c 5"i 7 1 - 7r • _ ). '&7--

- 3,C) 1/
• 

### 10. Gi 1:75 - 3

- CZ

- '3. b i !C.

- vi 7._ 2. 3 3 5" c- - GC. 

### ( i 6 .47 -)

, Qr= VM= AFr= ' 

### - . • , 7:1.. --, ..,c

. ' 

### - i Tm=
Integrated Gas Sampling Data: Moisture Recovery Data: Impinger 1 2 3 4 Desic c ant Total Final wt.; g i: - I% II L. Initial wt., g /0c, to cl ;(..),:_, IS'i Difference 96 i7_ ID if 

### 119Box No. Bag No. Bag Vol. at 15 in Hg Leak Rate, cc/nnin 02 Reading 02 Analyzer No. " Project 

### A.)

. ,.,. - 4 I\ Au', &I: 0'. ,,, 

### cm 

# .3 SM P Pitot NO. • 

### ) c Cp Sample Train Leak Rate (cfm) Meter y i. 

### coo Bar. Press. 

### 2.q.1c - in Hg. Pretest o 

### .00 at 15 in Hg Orifice AH @ 

### 1,

- M S

- 1 Posttest 

### • o .00 ati in Hg

- i' ft Liner Type:0 Glass 0 S.S. 

### tswy Other

•
Sample

Point Sample Time

6,1 Meter Volume vm, it' Orifice .6,H, - in H 2 0 Sample Volume 6..vm,_ ty Sample Vacuum,

i n H 9 Stack Temp. Is, Sample Train Temperatures, °F - Oxygen Content, % Probe 0 Filter lmpinger Outlet , Meter Inlet Meter Outlet ( 163G ) (5/./ v e.. 13 (



### . 3 ) .',5, 7 k , ,- 1. -- . 2 , - 

### ..,- ..F. i T,;. ! ' :Wi'''' • 

### fp. '' -

• C Sk,C , 1 G / , 7S - a 7.1.. 

### 44 -d 

### 1 1 C zci L. z.33 4(7 ' 5

- 7 

### e673.35 - 1:7 5 - 

### • 5: 7 c i , d /16 25 , Z. '23-S 4,7 (-,.

. ( ç7 • 107 , 7( 1-75 - 3. 51 -i. e J1 (.

. : - "zYZ_ Z3.3 Y 7 6 4 7' .5

- 7 5 - 2.,' i -

- 7 5 - 3 - 83 ..-- t 5 - .1 1 C z Ce / 7_ 3 -1, c-Q, k; e S' 7

• 6 3 ° ( 4.5 — i 7 r :3 . 4 g1 'I , s - ( I 

### C 7 5ii

. 

### 2.3 '5 kl s - 3

- 7

- i 15- et4i4i-V , 1-7s - 3. 79 y. r. )1 C 7 ( IL z3 Z L ( ) 19 Z , VS -- t. 75 

### 3-1t q, s -- r r 

### G 2 Y 2 - 2 - S _.? 3 45 - vt&

- 7....5 - i. 7s- 1 . ( 4, q S if C 2. ( Y Z.. Z 5 4

. 5- 5 - .LI ciao.65 - 1,7S - 3<7Cg 

### ilf,s --- Jr 2Y z-- Z33 cs

--- : 5 -- • s - s - 963 , V3 j.75 • 3-W i- / , 5 - // ‘ 2. / Z-3.3. 

### 6 i< 5

- Crc It. Co qD7 , 63 /,rs' 5 1 - S - 1/ ( a
-- Lrf z„ -z .3. 5 6i' 59

- --(- 44-3-5 H -

( 1

- 739 ) •

• •

•

,

Vnn= A

- Fr=
,,, ..'t =' . ,^7. , :!:,c...tpi-A.: :`....y: , :...?: '1';' ,..'4 1

- m= Sample Location 

### Ex), •1 263 Date. 

### j 2-12.4)c. Test • Run: 

### AI 

### 3

. Operators 

### WI(

. (443 Eff. Probe Length

- Moisture Recovery Data: lmpinger . 1 • 2 Desiccarit Total Final wt., g • +ft. 17z 11.L I C'( 1

- 9t7

- 163c i•: IN Initial wt., g ...E WO Jot i u0 Difference 97_ i y 0 + - t /2 11% Integrated Gas Sampling Data: 

# BA Engineering Company 

## • EPA METHOD 4 FIELD DATA SHEETB I 

# BA
Engineering Company 

### EPA METHOD 2 FIELD DATA SHEET

Traverse Point Information Cyclonic Flow .L° Ve ocity Head - Inches H 2 0 Stack Temperature - ° Point Number Inches From: Run 1 AP Run 2 AP Run 3 AP 4210 AP Run 2 Run 3 _--- Wall Port Temp.
1) - 1 0 . 31 

### o. 3 4 6

. 

### ‘0 e,3"/ e, Yi
z. () .9) 6 ( S -t - t). (;,, 4, 

### 3 0 ( 0 

### 3 o.S1 c) , 5"Y 

## (., gy a W tti 5

- 2 54 & YZ. C c.). s?- c) , sT 0, c /- .,, 41 c.- ..., C. C C. 0, s

- 1( 0 , 6 0 b., 

### 59- 0,, 

### SY ty C ( 1 7 6( ‘ ,6 C.( 6, 

# s - y

, 

### .)..5

- V ,,,Gi9 0. CY 

### o.5's" D. 5 - i 

### to 6..57 0 

### , cz ic O. SO 6, 5 

### ° O. ti3 tli c/f.. h. 

### ill_ f L a. ( A 2 1 t> 

## yy 6( 

## iit 6, 

## 91 6, 

# q6

6, 

### i17 Z. b 

### ' 53 0 74. 43, 

### V° 3

o. Go

. G 0, 6 4 J. CO cs. (6 1 .). cg 6,- 51 GI- r q T 0- 5 - / 04 c) 6...c7 1 , 6, cA, b. 

### tiff 0, SO (0 

### 6 , v2_ 6. V3 pi VS 0, qf • 

### (I
C ll 0 , 

## Y °

Schematic of Duct Cross-Section Project 

## MN - 0. 

# S4: rs Sample Location 66 

### ?

— Date IZIZ114 Operators 

### /‹.- Duct Dimensions - 

### 7 

### re) inches
Port Length .0e, inches Pitot Tube No. 

### r Cp Manometer ID Bar. ID Digital Therm ID T.C. ID Run 1 Run 2 Run 3 Run 4 Bar Press (In Hg) 21,/5 - 2,/.5"

- 2,1)c - 79. 

## )s -- Stat. Press (In H 2 0) 4- 085 — 4

- 0,31

- it 

## a_cts - t‘o,q6 Temp - Dry Bulb °F i 7 0 17, 0 1 7 1 i 6 1 Temp - Wet Bulb °F i i 4 1, I t 9 i I c t n C4 Moist Content - % 02% Time of Meas. !'M$ , i33c I i l Lir i 445-

Pitot Leak Check Positive: Negative:

Run 1 Run 2 Run 3 Run 4 Stack Pres. - In Hg Duct Area - Sq Ft. Mole Weight - Md Mole Weight - Ms Avg. Temp. - °F Average ‘rAT" Gas Vet - Ft/Sec ACFM SCFM DSCFM.

### Engineering Company

Project 

# yU , ) cm 

# 3 Sample Location Date 1 -4 -111\0 6 Test 3 Run I 

### cfl 

# BA

Operators 

## EPA METHOD 4 FIELD DATA SHEET

SM P Pitot No. Cp Sample Train Leak Rate (cfm) Meter y 

### 1,M 6 Bar. Press. Zel./C in Hg Pretest C.), 66 at 15 in Hg Orifice AH @ Posttest ‘sd (1 3 at 

## 2 in Hg Eff. Probe Length 

## 7 ft Liner Type:0 Glass 0 S.S. rkiOther
Sample

Point Sample Time

6, I Meter Volume Vm, Tr Orifice AH, in H 2 O Sample Volume AVm, tr Sample Vacuum,

in Hg Stack Temp. Is, "F Sample Train Temperatures, °F ' Oxygen Content, % Probe Filter Impinger Outlet Meter Inlet Meter Outlet

— ( 1 1 9° ) Meg , /5 1 -) 1SO litt:' , . 

## IZIAN Pr- I s - moot 1.

- 7( 3.'%(. (1.0 i To 'zyz. z - 3

- z- 3

-- s — 

### 5" 3 SO 2. / ''. 9)5

- ,c1C 7 5 .- 

### _1_, 3. .7-5 1 1

- .0 rZa •Zcit, 2.3 

### ( ...5`' z- 5 - 5 - -5 - 

### 1 3 lc 

### 919,11 /.7.5- ••%1 

### 3 , S - 12 0 Z'? 

### Z. 3 V 5

- f 

### & 6 51 Y 2.. qz 

### 3. em L'ir 

### -3. <61 3- r /

- z./ Z y

- z 

### s. itc,,qt 1.7c 3.%3 7- 5- 11 ( 2. 4 ( Z-

- Z. S3 5

- 5 -- 

### 67 

## Sr 7c 3- S'Y 

### 3.0 

## ) 7 i 2'/z. 

### e), - I ) c 

### 13` 1 - L i`i 

### 1.7( 1 , ic 5 - 7, cr /W 

### 7.4 , 1_ 13 3 

### < - 7- /o 5

- 7 1 1. ye. el 5

. t. _2 '1 '- ‘ /, 

### 7 c 3 .S5 3. 5 - 1 Z I 2 4 .1 2- 

### 233 S" I( 4

— 

### f

.-6 `l C2 4 ) 5 

### to - 4 Liz:Co 1, 

### 7s - 3,q3 

### 9 A /2-( "Liz- 47 Z 

### Li c- 9(403 / .7r 1.7-5 — 14.0 i z. ( V1 1 - C cc - q yet. 14% /.75 - 1.. g5 .-- q.(.) / 

### 21 2 

### S e Z.— S

- 1 '79' (-3 

### I. Go eig

- 3- 7 3 1..75 - 3. S5 - ci a /2 6

- zvz_ z33 

### (4' '7Y 

### 63 (IzS3")

o -

= 

### \ft= AFr= ,

__ , Th= ••• • •'•'.,..

_ ,- ' P

.. „. , 4,.1-, , , T

- m= I Zit 44 , 1\ Proc.,/ Oe (A.y 12

- 0 yes•k<44-

Integrated Gas Sampling Data: Moisture Recovery Data: Impinger 1 2 3 4 Desiccant Total Final wt., g /iv / i i toy 

### i001. Initial wt.,g 00 it) 6 i o ;) lir Difference 

### CI L/ I L 

### f Li 

### t I 

### I 2

- 

### 3 Box No. Bag No. Bag Vol. Leak Rate, cc/min 02 Reading 02 Analyzer No. at 15 in Hg

# BA
Engineering Company 

## EPA METHOD 4 FIELD DATA SHEET

Project 

### /1)C.4L S 1 1 0 1 t- NI

. r1.1-0 CM 3 SM P Pitot No. 

### I C Cp Sample Train Leak Rate (cfm) • Sample Location 

### GO'L Meter y /.06
, Bar. Press. 

### 29.lc in Hg Pretest 

### DO c) at 15 in Hg Date I 

### 2



### - 12



### - L 

### La Test 

### Run 

### 3 Orifice AEI @ 

### i•7Z-S

- 1 Posttest 6 

### , (

- 3 at 

# a in Hg

- 

# T._
Operators 

### 0"11( ( ( (13 Eff. Probe Length 

# 7 ft Liner Type:0 Glass 0 S.S.trOther

Sample

Point Sample Time

A I Meter Volume Vm, 

### n Orifice AH, in H 2 0 Sample Volume AVm, Tr Sample Vacuum,

in Hg Stack Temp. I s, "F Sample Train Temperatures, °F Oxygen Content, % Probe Filter Impinger Outlet Meter Inlet Meter Outlet ( 

### 13)0 ) ( 9V9,03) 

# NitmP

.

, -.- 95 7 4Y 1.7? '311 (1.5 - 

### / 20 2 y) z3c. t , 6 S Z. /.. 10 , 0 /. 7 5- 3.1.0 g. 5- / ZO Zq Z- Z33 Go 13 

### 6(.. 3 ir citE.s

- s -- /.7s — 

### 3. IL. 3. 34, 1 

### :i67 -- ei. $' 

### i 2 (--' I zo -z.vz_

• zY2- 2 3 Z-3 z-- c.5 — 17 4. 7 

### v

- 100 ( /. ii — c L$ - et73.Ze 1.71 7,9, I 9. r i Z(- ZS/2 Z4 4 7 / 5 - 

### 2' C. 3 ' — 1 7706 /. 

### 7 $— 3. $ ( 1' Si. s — / zo 24.-/2... t 5 (?" S

- 1 C 950.9 Z. /.3S - 3. cg., Li, s4" i 70 "Z VI_ Z 3 2 S's g 

### 7$ 61 '1 6 

### 9S1.15 L 7 C 3. 83 c- 6 i 2 4 > 7Y Z. "Z33 , l e l • 1 (. 

### 9 3 cis' 0118 121- /. 7 C 5. 40- 5

. .b 1 1 a

- 2 4

/ 2- Z.33 , 

### a6 cm „( 3- , 4 q1. , (7 1./ 

### c 7. '65 s'
-- - 6 / 2 0 "Z V I._ Z. ; ? C I 7 cl '76 cc 9ctL-3Z- / ..7c

. 3 - S:5 - sr 

### S - - 6 i z ,..) Z y z_ 2 3/ 6, '5 

### 7 V 76 

# e, & 6. l000,1 0 1 i .7ç

- 

### 3.5c1 - c.o. 

### J 7 1-4 /2_ Z3.1 , .L. 

### 5" 

### 7 54. 76

,
Qr= Vm= ATI=
Integrated Gas Sampling Data: Moisture Recovery Data: lmpinger 1 2 3 4 Desiccant Total Final wt., g / 

### 1 y 

### tit/

, 101- I 0 7 -i 1 fr 3 , Initial wt., g 10 0 / 6 i) i (.)i ) 

### 1 011 Difference I `1 Box No. Bag No; Bag Vol. Leak Rate, cc/min 02 Reading 02 Analyzer No. at 15 in Hg

# BA EPA METHOD 4 Engineering Company 

## FIELD DATA SHEET

Project 

### 4,i( 4 L m ; 

## cm sm P Pitot No. Cp Sample Train Leak Rate (cfm) Sample Location (-Oz 

### - Meter y I .060 Bar. Press. z9 , I5 - in Hg Pretest 0• 011 at 15 in Hg Date 12.1z110 4 Test 3 Run 7 

### Orifice All @ 

### / zS"/ Posttest 

### c),0 , at in Hg Operators 

### bItc-- ( CH) Eff. Probe Length ft Liner Type:0 Glass 0 S.S. 

# k - Other

Sample

Point Sample Time

A I Meter Volume Vm, tt Orifice ,AH, in H 2 0 Sample Volume AVm, tr Sample Vacuum,

in Hg Stack Temp.Is, °ISample Train Temperatures, °F Oxygen Content, % Probe Filter lmpinger Outlet Meter Inlet Meter Outlet ( 14 ZZ-) (Doo..1‘) .,..:`: - ' ,g!.-.'
, Vt.04 1 ' 

### tW ; 1 = 8 ) 1.7S - 3 - gH 3, S"

. / 2-(=. Vi3 73) 

### 6 3 "1-1 :70 2. 

### / 6 os , 0 CS j.7-C

. 3. ci, ( 1,, 3.5 - i

- zc . 29

- z_ Z33 4, 6 7S - 

### 7 6 3 I,13 I.4s e- 

### 3.3C fr 

### 3.<
1 

### 1 2 4. - 15

. -Ci /-75 - 3.Sq 3,,S 

### Iz`- ) zi-/ z__

- 

### z3

- z-__ C. 6 

## '

- l< '7 6 

## ici.49 r,7s - 3. cd ( 6 3.S - i 

### 2 `. 2 4 1 Z._ 2-3

- 3 

## c - 9 :7-1 7 6 2 3 .0 - f. 7 

## r '3- 

### 11.g 3-5" / 2 4

- 1 2.4 1 Z. Z3 3 

### S

- 9 "-17 7: 6 . 3 C - Z7. (17 I. 

### 7s - 3. 1,(a 3-5 - /Z 1..Y3 7..33 cg 49

- 

### 70 2 Yb 31,3o 1 

### , 7 r 

### 3. e61 - 3.5 - it -zy z_ 2)3 5 

### ? •7g' 7O

- 5 

## Yr 35 -, 

## IS f, 7 C 

### 5, 15 - 3.5 17(. Z'Yr_ 

### 23 3 

## 57

- 7 

### 7ó

sr - ':' 39. 0(-) t. 7 C

. 3- 

### 40 - 3.5" i 7 , 

### 1 2Y z: 233 S

.. if' 7 1 

### 7/ C

- 5- c - Lit 

### .(43 - f. 7 (..- 3. S.c 3.5 - / l'



### - ' zy z_ Z3. 3 

## Sic

- T et 

### 7 / 1. 

### 7c 3- VC, 1,5 --- Z.3"3 S' c1 

## (is

- zy)

i

_

-. 

## - Vm= ,A-Ft=

, , V.O.'•V .= ' ,..,,,,, 4, ' -:;',, - 

### Integrated Gas Sampling Data: Moisture Recovery Data: lmpinger 1 2 3 4 Desiccant Total Final wt., g I qz- 

### /I G 106 10/3. Initial wt., g 

### 16 b ic.) 0 t 4, -> 

### 1 0 ° P Difference ej Z. I ( .40 . 

### a 

## 1 i j lei 

### Box No. Bag No. Bag Vol. Leak Rate, cc/min 02 Reading 02 Analyzer No. at 15 in Hg

# Appendix C
Instrument Output

### I

11 I

11 1

1 1 1, 

### Northshore Mining Company Line 12 Waste Gas Stack 12/20/00 NOx Output

1047,A Wholiallo M MI w

o mmnuomnInnunnnnonnnnonnonnminnunnurnionnunnonnomn nwnimimmonnmennonnumniummonnommonmommumnumunom •NENENINHENENENNENENNESMEEMERNEEENNENNEMNENEMNONEN NONENNENNEEEMMEMMEENNOMENNENNEMENSONNENNOMENNNNENE EINMENNEEHENEEMENGUM WEEMMEZET.ENENNNENNEMINENNEME MEENEEMEEMNE ■ F"MMEgRNIEPAINKSEMENOMEMENENENEMENENNEN EMEMMEMMENEMENEENESE NONNONEWm0MSENANNENNOMENNONEE MMERMMEMMIUMEMEMMINIMEMPANRIMMEMEMIMMINIMEIMMUMM EMMEMNENENNMENENNEENERWMPOUNNENENENENNEENNEMNENNOM mummummmummmEmmummgmAVAmmammommommommummommm EMMENNEENNEENNEENNEENEMEMENNANEMENMEMENNEMENENENE ENENNENEASNEMINSWEENNENNEESEEEMEEMMEMMENNEENEMNEEN NONENEMSNMEMENEENNEMENMENNMNINEENNNEENEWNENEENNNER 

## o RMEENNESOMNEENENNEGEMEEMMEMUMNENNELENIENNONAN nmminnommmonmonsmunnoninnnuninnnonnonnmonnumnimnig nomnionnummunnnsumminimmomn snmonnsummommummon MENENNEMENEENENNONNNOEMENNONEMMENENNEMENNENEN NEEMENNEMENNEENNONNEEMMENEBNONEENNONNESMINNOSEN NNEENENEWENEEMENEMMEMEMENEEENNEMEENNONENEMENENENE NNEENNENHONNSMEMNENEMENNEMNEMEMMENSENMENNNEENEEMEN NEEENEMENNNENNEMENNNEEMENNENENMENEMENENENEEMENNUN MMEMMEMMIIMEMBEMMOMMUMMMEMMOXIMMEMENMEMMIUMWMUMM MMEMIIMMOMMEMMEMMEMEMEMOMMEMMMEMEMEMMEMMEMMMEMMEMEM ENINEENNONNEMENEENEENOSEMEEEMENEEEMENENENNONNNEESE NENENENNUNENEMMENEEMONMENEWEENEENESINNEMNNENNENEEME NENMENNEINNEENNENENENMENNENNONMENENMEREENEENENNOMN ENNEENNESENEENMEINEENENNMENNOMEMENNENENNONEEENNEEN NENNERMESENEENNEEMONNENNENMENEENNEENNESEMNNENENE MMENEENNISSONEENNEMEMONENNMENNOMEMENEMMENMENEMNEEM EMMONENSMONONNEENNEENNINENEENENEEMENNENNENNENEMEMEN ENENNNSEEMEMENNNESENEENNEENEENEENNENNENNNEENMENNEN EMENNESENMENNENNEMENNEMENEMENNEENNEENNOMEEMENNNE NENNENNNENNMENEESMEMENMEMEMEMSENEENMEMMEMENEENMESM 

## 2 NNINENNECONSINNENNEKAMMENEMEOLONSENSEENEMESEEMEEMN NEMONENNNIONMEMENNEENNENMENENNENEENEMENENNONEENEMEN NNMONNNNNNEIEMNENNEENNESEINENNEXNESSIMSOMERMEMMENSM EMENMENEHENMENNEMEENNEMENNEMISMENNENEMNEENNEENEENNE ENENENNEMENENNENNENEMEMEMENNEENNEMNEENNENNEMENEEME ENNONEENMEMONEMENNENEMNEEMINNIENNEMINMENNENNEENESEN ENNEENNEMENNEMEENNEENENENNEENNENNENNEENENENEEMNEEN NENENNEMOMMEEMNENNENEMENEMENONMEMENNEENNNONNEENNEN NEMEENNEHENESENNEENEMEMENNONINNEMENENEENNEENNEENNE NESENNENUNNEENNNONMEMNONEENENMENEENNMMENEMMENNMSME NENNENNEUENSMENEMEMENEMENEENNINNISMNENNENNNEMEENNEN ENEMNONNENNNEEMENNENEENEMNEENENONNEMMENENONEENENEN ENNENENNONNNNSENNEENEEMENNEEMENMENNEMMENNENNENNENE mommommingimmuslommummommmommammmammummam mmormummamommummommummommommammammumammmum mummommaimmummmommummommumommummommammammumm mommommmomommommammulmommummmummmommommommomm MENNINKRIESEMEMEONEMENMENENENEENNENEENENNENENNENEM NEENEMNESNONEMONMEMSENMEINSEMENEENNEENNEXEMNEENNON 

## M NNENNMEEPSEENEENENNEMMENEMONOMEEMENEMEPEMENNEENSIM dmmmlammanmmmommomiammummuNimmumummWmmmommma& EMMEMMINIHMEMEMMEMMOMMOMEMEM MIMMEMMMUMMMEMMEMMUMM IMMMUMMEMMUMEMMMUMINIMEMMIMMEMMENEMMEMMEMEMMEMMEM MMUMNRIMMEMMIUMMEMMOMMOMMEMEMEMMEMMEMEMEMMIUMMONM EINESENEWEENNEEENNEENENNEENENNENEENNEENNENENNONNNE ••E•N•N•••N••••N•M••EEN••••ENNE•EN•E•ENEN•EMEE••EN NENENNINKENEMENENMEEMMENNEMENEMENENNENNEENNEMEENEN mmmmmmmmmmmmmmmmmmmrmmmmammmmmsmmmmmmmmmmm immummommommaagummakirivinmumpammummummommommm rummommummmommwmaimmlikowTacuummomm••••mmommus ENEENNEEMONEMEMPUENNNE MENNMEM EMENMEMMEEMENNEENEN NONNSENEMNEENNNEREEMNERNEREAUNKNESMNSNMENNENNESEN MENENEENNEENNEMNENEENERNENNENEEMENNENNENNOMMENNMEM EMEMENNEEMMEMMEENNENENIEMNEINMEEENNENNEENEMENENONE NEMNEENNEENIMINNEEENENNEMESEENNNENENESMEENEMEENNEN EMEENSENERNEENENNEENEMNEENNENEMEMEMENENENEENNENEN N•EME••EM•••••N•••••EN•••••E•M••••••N•E•EN•E••E••N NNEENNEMENOMMENNEMEMEEENNNEINEENNENNEEMEMENEMNE EMNESNMESNINENNERENSEENEENNEENNEEMENENEEMIENNEENNE ENEENEMENEEMENENNEMSENNEMNEMENEENNENENEMENEENNENNN REMEENNMEWEENEMENNECINENNUINEMONEEENNEMOMMENENNEXt mummommmimmommumismiummumommommmommmmommummomm gmmmimmommommummummummommumgmummommummu morm gmummomummEmommgmmommgmommummummum mum mommumammungrommogmmoommimmummummummomm magnommommmmougnommummummummimmommummummmom mmumamommommorammommormummimmmommemmommom mimmummum

- --plag a 

# 1 m miummummimmummammano

inmummg mil • lw 

# t g mimp Elm mmummmommimm riummimmollimmi. I'm mi im. 

# mil .• • mommullsomm 

# I pfilliim mi miumminimmum ommummsromms mol a mommulummomm 

# I. s 1 ... Alz remimarmommummium maimm mmilmgmlmom m 

# ilu m m_ 4 _mggm so numgmgm mourn mmmgm mom mmmgmgmmmg mmouggmmm

........ ..... 

# U num 

# NO 'a f 

# • NE NOMENNONN

SENNEEMONENEENIMNOR 

# 2111:111111111111.1111111111

., milm.

IIIMMOOMM MinEMMEMEM OMMIMEMIEMMEMaiMM IMM"......... MMW 

# 1 P ' 1 1 111 11111111111111111111111 1111111111111111111 .............m. nil ill ...... 6Immmgmmummmummomm 

# MIRA laguirall1111111

munnnunmonnamnon n na.. 

# ilt., immialmillibilm i l



# lii II PIPI 11111111111 11181111 mono mm mommomm mm m 

# 11111 141111111111111111

imm mmilm 

# 1 MENNEN g 

# I 

# NEE, — EMI—ELMUS0 NENNINENNIINIEMENENII • INISIIINKSIVIIENNINIENER

IIIIIIIIIIIIIIIIII1 1111•1 IINIIIIIIIII 

# 111111111! NOME ONION mggpmmonnonong ppg MOINIMMIN MN NONSENSE 

## 1 

# 1 1 1111111111211115111F 111111111 11111111111111 1 

# iml iiimpli: 14:041111111111mullum alm.m.:1.

... ........ 1.41.11 1 111p ag impal i giarliamilla

.. • g 1 UM gm um mum ow mgmmammaggmmmommmi gnigmimmIggigggimmimigmm•gmgmm Em migmmom mggemogg mg mi mom omm mm•g mgmumggam

WIRMIIMMEMMUU mmin 

# 111111111111111111 !I MI 1 11 11111111111111 

# II MU MIIMmmAll IIIP '

P..- 1

'- 

### Northshore Mining Company

Line 12 Waste Gas Stack 12/20/00 NOx Output

• mommomummummumummomummommommul smssmmmummlmmmmnmiuumnmlmmmmmmmmmmn• MENNEMMEINNUMME EMMEMMENMEMENM MENNENNEEMENEMEMENE MEMMEMENOWEIMMEINNEMINEEMMENEWININNBINEVENNEMBINEMt EMENNUMNIENEEMMENEMMENEMEEMENEMMEEMBEININNUNIMEMENNM NNUMBEMMENNEMENNUMEMEENEEMENUMMENNEENNEMENUMMUMME MBEENNEEVENNEMMEMENMEENNIMMEMINMENEEMMENNUMNIMMUME MMMNEMMMMMMMMMMMMMMMIMMIMMMMMMMMMMMMUMMMMMXMEMMMNB NNEMMINENIMMEEMENUMEMENEEMENEMMMENNEMEMEMENNEMENNE EMINNMEMENAMMENEMEMEMEMMEMMIMMUMMEMENNEMENEENNIMMEMM MBENEMENNVIE: mmwaammmmumuuummmmnmmmmmmmmm mummurmamminummtmoompummummommommummul mmmmmmrmmmmmmmmemmmemmAq2rcemmmmmmmumumum mummiumpummummumismsibummimpummumm

• U•M•MM•N MUNNEEMENNUMN NEUAMMENNENXEME MENNNMENNE nummumarimmummusimussukumunimmmummummo • u•••••• mn•mmlmmmmmmmmmmmmmmmmm•mmmmm• ••••••=mummumummommummumiummummummumumum mmmmmmmmmmmmmmmmqmmmmmuuummmmmmmmmmmmm maammummiummimmummle MEMEMENEMENEMENEMEMENNEMENNE INEMEMMENEEMEN WNWLEIIIPMEMMEMEMENNEMENEMEMENNEMBENE INEMEMENENNMINN EMEmENEMMIENNEMMENEMENMENEENNEMENNE ENNIMMEMEMENEMMEMENEEMMEEMNEEMMMENNEMEMEMENEMENUME RmmuummuammmumlEm•mummEtuumucmcmmmmmic sommummimmummummummummummummumummum mmmmmmmuumwmmmmmmmmmmmmmmummmummmmm MMINEMENNEMEMEEMONEMINENNEMEMENNIUMEMEMENNEEMENNMN EMBEEMEMZEMEMBERWABBmaGmmENEMENNEENEMEMEMENNEMEENE MENMEENNEEMEMENEENNEMEMENCIFMOMMEMINEMEMENNEMMINNE

MMMEMMEEMMEMENN M eNII EMBNNEME m mEm" m 

# "BMEMB I mmumammummuumnslmouraL , gaimmedwipsommumm• ••=mummmmummmmmmmIIImniggmugnmm E mmm ummunalmommom mmummummummiummumummommam millumommomimmommummuummommummonnumumu MMEMMMINENEEMEM IMEMENEMEEEMEMINNEEMEMMEINEEMMUMNBEW 

# MEE MIMI IMMEMEMMEMN MWESOMM EMMUMBNIENNEW INEMENEN 

# M I MVINENNINENNEMMT.NTIANN IMMEMMEMEMMENNIUMEMEMM MIXAMMEMEMMMEgOiweNCA 

# Ammo mftmomm.mommiummum MMINMEINNumEMEBB limmn mmilm MEmmEMENITEMEMENNEMUMME 

# M mmmmm mummummEMEmwmammitINEEMEIMENE NEEMMUMEMENEME ENNEMINNEITINEEMBIENTIMPANEml MIEN mplEmEnNumENNE mormummgm mu murcalluiger.as

- nkmummummuu MEMEMINEMPE MniMEXEMOMEXIPIAPII ENrigalwIEENNEMENNE EMNUMEMEN MEIN mows u 

# WM mumm mumummummum smomummumumnimumummommonmommilmummuismomm• mmmmmmmmmmmmmmmmmm.mmmmmmmmrmmmfiumm mmmmmmmmmmummumrummftmmmnumruml mimmomm mummoumummummum momommuslim mom imams mummommummumummum mummommimum mmummmummumm , MREMEMMEMMUMMMINIUMMENEMMEEMERMNN ENOMMEMENUMNIMMNI MNIEMMMENMENMEMENNEMINNEMMEMENNEMEMENNENEMENNWAMEM

- ME EIMMENNEMENEMENNEBNEEMIMEMEOMMUMMENNEMMUNIWNME BE E.MINrEE••NENNUMEMENEEMMENNEEMEMMIBMONNN ammummim i • N mo 

# r mu 

# I mem 

# 1 mum IN wnimmummumwasimm• sorminmerir i car 

# riftial Nr• 

# ••••••••••ml••••• smommomummormum mmummmm Smuummmaimman mmmmmmmoIMMyNM lummormo MENNoMMENNEMENEEMMMOImAMEN

ENNEMMEEMENNEENEMENINEWIEME INNEMENNMEMMENEMIMIN MEMENENNONEMNENEMEN NEMEMEIMME EMMEMEMMEMMEMENNMEEN 

# I mmuumman 

# 1 Mum mii - 

# • Is mmumnam • mums MEEMEMBNEMEM ENNINNE MOEN= • EMEMMEMEMEMNEEMMENEM

ENNNEMENmEOMMINEMENN ONNIMEMEIMMEMEMENNEMENNEMENMEN ANNEEmEMEMANOMMEMmuEmMN MENEmE2MMEMENEMUMMEMEMEMIN EMEMEMMEMINIMIUMMINIEME NMOOMMEMOMMEMEMEMMUNIM MEMMEMMOIMITUTIMMMMITIMIRMIMMICITINWIMUTWAW.. 1111111.11111M1011. MEMOIR: ur 40 1... em

- UmmemilLoalimmor, MEMBENUNIMAMM OMEWWIE NE'r ■ WMENE [LEMEMINEEMMENN MENNEEMMEEEMEMENEKNESMNYEEINERRUME mrammELBIUMMENEM MEMMEMMEMENNNMENNEMEIIMMEMETMENNINEHAMATEW,NEMMEX MENMEMUMMENMEENNENIMMENBINN EMUMMUMMENMEMMINIMMION' mNaMMENUMMENOMEMEMIXEMEMMEMENINEMEMENNEENXIMIMMENNW MENNEMINEMEMENNEMENEEMENMENNEENEEMUF9MWMLOMMBE•E•N mummuumummummumieummummluswiimmimammummull' mummummommtualthimmummomm mimmmillimmummilumm' mmummumnumwmummummarmummummgormummummom NEENEEMENEENUMAWMXIMMAIMMw ElMEMBENEUMm EMEMMMINNEM MMUNNENEENN=MMEMENNENIMMI NMEMENMENEEMEMMENNUMMEEM.1 MENNEMMEMMEMMENEENNEMMN MENMEMENNEMENNEDNEVAWAINJR ' ••••••••••••umurrammrsmummuse offrari suri A mi l mumssammommummommumalummommummummummer MEMENUMMEMENEENEMMMEENMENNEMEMPMEMEEMENNEMEEMMEN • MENNIMMNIMMMENNEWENEMNUMMEWNEMENMANNEMEMMINNMENEMMX ANNMEEMENVIBBEEMAMILMWENMENUMEmMENEMENNUMEMENNEMEN mommummvisommaimPammurgammulimmummumnimmr MEMENSIMEMMENEMMMERRIMMIIREMM UNNEMNIMERNEMMUNNEM. r ummummmmmmummmmmm•mmmmmummmmmmummmmmmmmm6 miummuummummummummummirammrsommummumm MEWMEPAWW 6 EMPINUMMEEMMMITPERBEErNNOMEMEMBEEMBENNEME muumummumamMommummummtimumm mummumimmummommum m•mmmmmmmumwmmmmmnm•mmmmmummhummmmmmmmmm mmmummmmmuimmnmmmmmmmmmmummmmmsmmuum INIMMEMOMMIMMEMENNIMMEMINIIMMIUMMUMENINIMEMNIUM MEMENEENNEMEMMENEWMMEMMEMEMEMEMENEMEMMEMENNEMEMEME MENEMENNEMEMMINNIMENNEMBEEMMENEENNMUMEMEMUMEMMINNEN MINNMEMMEMEEMMENEMENEEMENMENNEMENEENNEMEMENNEMENNME MEMEMEMMMENNEEMENMEMEMEMBENEMENNEMENNEMMEMENMENNM NMEMMENNEMEMMENEMENEMENNEMENEMENEEMEMENEMENNEMEMEN MMENNUMMEMENMENENNXEMEMENEMENEMMENEMEMEMEMENNEMENN MEMMERIMMUMMIUMMIMMEMMMEMEMMEMMENMIUMMUMMENR IMMINIM MOMMMIMMINIMMIIMMIUMMOMMIMMEMIIMMEMMEMEMM MEMEEMEMEMENNEMENNMEMENEEMEMENEMMENEMENIMMMUMMUMN NENE . MENUMMENNEMBEEMMEMMEMMEMMMEMEMBEEMEENNIMMEMM 

# . ••EEM••VIN•ENNEE•EMM•E•M•MMt G.)

### Northshore Mining Company Line 12 Waste Gas Stack 12/20/00 NOx Output

mommummindimmommlummumummilommummommommummm• nummmummumummimmommilmommummummumuglimmumm mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmsammmmm momummumummummiummommummommummormmmumum mummummommummiumumummummummiumommommumm Imminumminumnsmommommummommimmommomminevammumm MEMMEMMEMMEMMMOMMEMMEMMEMMEMEMEMMENINIMMUMFAMONIMM MEMEMEMMEMMENMENUMMEMEMMUMMEMENIMMEMMEMMEMMIMMENN mummummommusimmommummommmimmumummonfamommon AMMINUMMERMINEMMEMMIESEMMEMENNMIMEMMEMMEMMINOMEMMIC REENNEMMENNEMMESEMENNEMMUMEMEMMMEMEMMENNEMPRIMMEEN MEMEMMENENNUMMEMMUMMENNWEIMMEMEMEMUMMEMMOMIMMUMM nummommumummammommommummammummmommammiumn MIIMMUMMEMMUMMUMEMMEMIMMEMMEMMIIMMEMIMMEWNEMMEN MENIIMMEMMEMMUMMUMMEMMUMMEMEMOMMEMEMMINNEMEMMEMMEN MMMEMMINIMMERNMMUMUMMENUMMEMEMMEMEMMUMEMEMEMENAIMMEM nommormummennownwammummonniummummumrummomm UMMEMINMEMEMMIMEMENNUMMEMMENNEMEMENNIMMEMUMMENWEMME MMEMMENIMMEMEMMEMEMEMEMEMMENNMEMEMEMMUMMEMENUMME MMIIMMUMEMENNEMEMMEMEMENIIMMEMINIMMEMMEMEMEMAMENNM immunommimmummmonmumummErmmummummusgmmumm MMEMMUMMEMEMEMEMMEMMENNEMMEMEMENUMMIUMMENNIPMEMEMME REMEMMEMEMENNEMMEMMEEMMUMEMMIIMMEMEMMEMEMMIMMEMMEN
• E•NIM•••EMOM•EM••MMINI•MEMMENNU••ENNUMMEMEMMMIUMMN IIIMMEMEMIONEMENOMMEMMINIMEMEMEMMEMMENIMMENNAMMEMMEN UNIIIMMEMMEMMENEWEEMMEMBENIMMEMMUMMEMMEMMENIENNMENNE MEMMENUMMEMMEMESEMMUMMEMMEMMEMBEMMEMMEMEMINFIMME MMEMMENNUMBEENNUMMIMMMEMEMEMMMEMMIMMEMEMMUSITUMMUM mummimmummummecummmummummummsmounrnmaummomm AmmummmvammorammEIMWMWMMELMMEMMEMMMUMMIIMeammiu ummummommummwmumammirmomwmonmmmummimmillimmim E MMIUMMIUMMUMEMOIMMEMMWRIMMRPAZN•MIIMMEM•NEMMINAMMEN inummemummulmwmunnomemmusamimmussmsmwmontimm• nommommommommommommommommommommommummorummom MEMMUMMEMIEMEMEMEMMEMEMMEMMENMEMSEMEMEMMEMMIUMMEM
• MMEMINI•MUMMEMMUMMI•MUMMEMMEME•IN•EMINMONMEFSMUNS immimmongrummunimmummummummummolimmammom limmommommEmusimmussummumammenummommaminunv MENN EMMMEMNEMEMMEMMEMMOMMEMENNUMUMMNIMUMPMEMMOMEmmu mmommommommommummummiummumammumm- E MMEMMUMEMEMEMEMEMMEMEMEMEMMEEMINEMMINEMEMMEMEN •••m•••m•m••romm•••mmum•immummimmommalmommom

• I I IM•EM••NNIMMEMEMEMENNU••E•EMINM•NUMERMENNINKNOINMEN M MI I IMMINIMUMMMMENREMMUMMENIMMMRIMMOMMEMMINIMMMUMMEM S MENNIUMMUMUMMINUMMEMUMEMMEMOMMEMMEMMEMMEMMEMEMEM 11111 M EN NUMMENIMMENNIMENUMEMOMEMEMMMEMMENUMMENIIMEMEM mmommommommommummEmmomminummormommangrommum NE M M ENEMUMMENNUMMEMENUMEMEMEMMEMMUMMEMMUNIONONMEREM MENE RNMEMENIMMEMMENNEMMEMEMIUMMENNIMMOMMUMENEMMIUM A MMINIMMEMPAIMMENNMEEMMONEMMENOMENIFIUMMUMMEMAMMMAN M MOIMMEMENUMMEMMOMMEMMEMMEMINMENUMMINUMMEMEMEMEMME MEMM UMMENMEMEMMONEMEMIMMENRKERMONEMMEMEXAMMEMMEM m•ni•m•ummu•mommummommummummummummonsommom, MEMM EMENNEMMEMEMMMEMMENNUMMEMNIMMENNEMMEMENLimaill= 111111 MMENNEUMMMEMENEEMEMEMMEMMEMRIMMEMEMENNEMWEEMESIZAMM RI E .. E 

## .. EEEE:====== MEM ammomms milimummomminimilimminalgumwdmammommummumarmor immommuummumummummardammumminummmmmommis IM I MM OMMEMMEMMEMINEMEMEMMEMUMEMEMMIMMEMEMIUMWAIM041 mnmnnammmmmsminmmmmnmumnsmmmsmmmnmmmmmmmmAmmm" mommilmmiummicammmmummasmommummommommmill• immumminmuummumummummummommommmommmommulams ommummomminommimmummummommommommicammormsrmi mmiummummommummummummommuommommazerammagm- immummummommommumpummummilmmimmunAmitm MEREMESMNEWOMMUAGIEMEMEMENIMMEMMWMINNENNIMMERM alkiiiillingiCinnagniiiiiiiiiiiIiill i al i alrat mo mommomommmommommommommommommomommommommommomomo iiiiiiiiiillUditaillalmasaiRomp011idiniiiii mommoommommoommoommommocmommombugagAm4mmummum mpmmmmmmmm•mmmml•mm EM mmmommmmm mmmmmomwmmmmmmmmmmmmmm MENUMNIUMMEMMEM MMUMENUMMENNWIMMUIMMINEMEMOMMEN MINIRMEMMUMMIMM imunmammmommummunamummons miummommmommommem Immimmommummommom m•ploymwm muurprommimmou giummili•••mmi•us mirmilwmilmm mum am mom gml• • is is mom •iumppimmoimmu mum mu mIlm on imelm•L 

### um mmumwiscpmmil 

### mmmm m m 

### ms ro 

### m IMIRmammummumlipmEr 

## 110 1 PIIIIIIIIIIIIIIIMARIE rimmemnimirmatzmarrnir Elm mumm III 111111111 nommaninimmumo ummommamm mommommummmem. Frommpammoommoim•ommom•ummommomomm mommommalmmuamt41.adowomm•om1ommommo••ommommoommom m mmummiseimnswilmmummummemplimmilmumsommum 6 ....m...00mmommIrmssimm lummimmommormomm mommommo momovimmpomm. Amgoommm mom mommommmommomm oommommomm og a_ ME miNdmiorrom-mimm Immo MaNORMEMOMMIUM ASEAME MEMMILMERMINEMM 4, MEM MEMMOMMEMEMEIN 

# i I mommommomommummomm . mumaam mom om•ommoommommom

NNIMENW omommommommoommomommoommomompi-mommommommommommomm MEMMEMENNMEMMMEMMEMEMINNE M140

. brotommommommommmom momommomommmommommomommommsmilmoinimdmmommommomomm MEWAMMEMEMENIZZEMMMMS.MEEMEffill mmmmmgmmmmmommmmmmmm motloommommomommommommommomomm •mpoommommommumommo oromomommommommmommommommommommmmomommommommommomm 

## F milum ■ Lommmompoommmommoommommomoommoommommommomomm omommommomomommommoommmommommoommommommmommomm momm m ommom 

### iu mommommommmmor IM goommolommoommoommommom MINI momomoommomereimimm4 mommolmoommommommomommmom MMIMMHEMBINIVRial Eftl AkErilliMMEERIMMEMIM IMMEMONEMMIMINEMMEM UNIMPMEM 

# Ai INIMMEMMEMENIMMEMEM mommmomormommoommgm modoimommmommomomomommommomm mommommommommommomommigwar, ommoommommommomommommom symmommunimmomminimaA. mormommommommmommommomm moommommo• mmim mommgoommoommmomdmmiommmi mmo mmommommommommo mommoompommommomommommomummom mommomommomm moommomommommoommmoommommoommommom immommommommoom MIMMUM MEMEMUMMEMMILAIMMIMMELMUNIMMEMEMAMMEMMEMAN ••mmomm•mmmo••mm••mommo•••mmgommommom•omm•mmommoom momom•ommom••om•om•omm•m•o•mommomommo•mo•m•mommomm ommommommommommommmummommommommommommommommmmommo ommomommommommommummommommommommmmommolommommommo
• m••mo•mo•m•omm•m•o••mo•mommo••ommommommommommomm o mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm m moommommommommommommomommoommoomommommommommommomm mo••m•mommom•mmoommommom••mmommommoom•ommommom•o•m mommoommommommommommommoommommummoommommommommomm IMMEN NEMOMMEMMENNININMEMENNIUMMEMMIMMEMEMMEMMMIUMME IIIMMEMENNUMENUMMEMEMEMEMMEMBEIN M RE miummirmomm 

## • L • 

# i

F9

-4 r - -1

I

7 I

, • I



### I I I I

L :771

I

IVA

### Northshore Mining Company Line 12 Waste Gas Stack 12/20/00 NOx Output

EMINIMMUNEMMUMONEMMENEMEE • • _ m..., 

### ... ■ MEMSEMINIMMEMENMEMMEMIMMEMEMMUMM O7MMUIRMINAIMMEIME0 MIUMMEMMEMOMMENENMEMOMMEMENIMMEMMUI/ MMORMENMMEMMUM mumummimmommummommommumnfmamm ilwammummi EMIUMMEMMUNEMENMEMMEMNMIMMUCZEMM UNEMENOMMUMMEN MIIMMINIMOMMMEMMOMMEMMEMMOMMIMEW M2AMMOMMEMMEMEM. MINIMINIMPOMMMINIMMIMOMEMMEMMEMMUWA MMEMEMONFIUMWOM 

### I 241111111MMINEMUMMIIMMLAMMOMMEMM UJIMMENEMEMEMENNEMMEAU NMEMEMNIMMUMEMENUMMENENUNMEMME EMUMNINOMMENENEM mumminimmummimmilmmilmmummerommomm untommumm. ONEMEMEMMEMEMMEMEMMEMMUNEMMEMMI COMNIUMMEMPEREMEW MMEMEMEMMEMMEMEMMEMOIMMEMMEMMEM ENIMMMEMEWOMINEMEN EMMIIMEMMOMMEMEMMOIMEMMEMEMEMMEMMEM MUMMEMEMWOMEMEME MIUMMEMEMMEMMOMMMENOMMUMEMMOMM EMMEMEMEMNIMMEMMEEM

• ERIMMEMMEMEMONMEMME•ME•EMM•MMEMMI NIMMMUMMUMMENE MMEMEMMEMMOMMINIMOMMIMMEMMMEMMU MNUMMIIMMIMEMOM MMEEMMEMINIUNEMMEMMIMMEMINEMMEMEM EMEMEMMEWUMMENIM IIMMEMENNEMINIMMEMEMMEMMIMMUMME MMEMMMEMOMMIEMAMMEME MOMERMEUMMERIMINMEENIMMENEMMU MMONIMMONMEMMEM MMENNIMMEMMEMMUMEMMEMEMEMEMMEMEM EMMEMMEMMMWRNEMEMENEMOMMMEMMEMEMMMEMERMIUMMEMMINIM MINIMEMEWOMMEMEMMEUMMENMEMMEMMEMEMOMMMEMEMONNUM ENOMMENAOMMUM

• IIMEME•OMMEME••MEME•EMMEM•MEMEMM•E• EEMPEMZWIIMW MINIIMMEMNEMEMENENMEMMEMMENMEMMEM EMEMMUMNIMERMINU MINIMEMMIMMENEMMENEMMEIMMEMMEMMIMM EMMEMMIMMUMM= MMEMMUIMEMOIMMEMMEMOMMEMEIMMISIMEM MINIMEMMOMMOIMMME MMOMMEMMPOMEMMOMMOMMEMEMMINIMMEMI MEMMEMMULIMMMOR OAMEMMUMMUMMEMEMLIMMIUMWMEMME EMMUJIMPUOMMAN ingERNMENMENUEMOUREMEMEMEMENEMEMEN NUMNERLIMMUME EMMUMMINEMEMIERMMENEMMUMNEMMUMEN ENEMmiimmummi MEMMEMEMEMMINIMMUMMOMMISMMINIMMEMM EMMEMMEEMMILKMNUMM MEMOMINIMMMEMMEMMINIMEMEIMMEMMOMMEM MEMMEMINMAIMMEME MMEMMUIMMEMMEMMEMEMOMMUMUMMIMMEM INIMMUSPEMEMEM MIUMMEMEMMUMMIMMEEMMEMEMOMMUMEM EMENUMMEMMEMEMEM IIMMUMMEMEMMININEMEMMOMMEMEMEMEMEM EMMEMEMMIMMKAUM MMEMINIMMEMOMMINIMMEMMONEMMOMMIMME MMEMMIMMOVIMMEMM IIMMEMOMMOIMMEMMMUMEMMEMMINMEMEMEM UMMINIMEMIMMEMEME MMUMMOMMEMMOMMENIMMINIMMIMMEMMEM EMEMEMMIMMIONME ENEMENUMENUMMEEMMEMERMENIMMEMIU MMOIMMEMEMMEMEM 

### •••••••••••••••••••••111•1111•1• 11111111 • 11 . 1111111111111••••WarA••• IIMMEMIMMEMMOMMEMEMEMMIMMIMMOMMEMO MMEMMEMMOMENWEMEM EMEMIIMMEMMUMMEMINIMMINIUMMEMMOMMEMEM EMMEMEMEMEMMINEM MMEMINIMEMEMEMMOMMINIMMEMMEMEMMINIUM MUMUMMEURgill= EMMEMUMMUMMERME••MMUMMIUMMMUMMUMM UMMEMENONEEM INIMMEMIEMEMMUMEMEMMEMEMEME•E•••MIU •M•MMINIMP52=1" EMEMMEMEMINIMMEMOMMOMMEMMEMOMMEMMU MMEMEMMEMERMONEM IIMMEMEMEMOMMINEMMEMMOMMIMMEMMOOMM MEMMEMOMME4MMO AMMERIMMOMMOMMEMLIMMINIMMEMEMINI UMEMMMINMWEIMMI MENEMINUMMIMEMMEEMMEMMENIMMEMOMMA NENENREMMIEUM MINIMEMMERMNEMEMMUMMEMMEMEMMEMME MUMERMEMOMISEMMEM MEMENMEMMEMMEMMINIMESMEMMEMOMMUMM MINIMMEMEMWMMUM immummummimmimmummommummummum mumumammum ummummiliummimmommommummom mummimmu MINNEMOMEMEMEMEMINIMMEMEMMUMONIMEMM EMMIUMMEMIENIMMEM MEMEMMROMMEMEMMEMMEMEMEMOMMIMMEMM ENEMEMMEMMEMOM MEMEMMIMMEMMEMMEMIMMEMMIUMMINIMMEMEM EMENOMOMMUMME MMUNMIMMEMEMIIMMUMMEMMEMSMEMENUM MISMEMIENUEEM MINIMMIUMMIMMEMMEMEMMEMEMMINIMMOMMEMEM MOMMEOMMUMEM MINEMEMEMENUMMMEMEMUMMUMMMEMEM MEMEMEMONMEMEM IMMEMINIERMIMMEMIMMEMMEMEMSMOMMEMEN ERMMEMIMMMEMMEM MEMEMEMMIUMMEMUMMEMEMEMINEMEMBIMU MMERMEMOMWMIMMU

• ONEMMEMEM•MMEMMA•MEMEMEMEMOMMIIMME MMEMMEMMOMMEME MEMEMMMEMMUMEMEMEMEMMEMERIMEMEMEMU MMEMEMMEMMEM OMMEMENIMEMEMMEMMUMMEMMINOMMEMMEMEM EMUMINIMMIUMEMM MMUMMUMMINIMMEMMEMEMMUMMEMMIMMEMMEM EMMIMMEMEMMEMEME MMIMMERNMAMMEMMERMEMMEMEMMONOMMEMEM MUMMERIqAMMEMM MSEMIRMEMOMMMEMMEMOIMEMEMMEMMONEMEM MUO 

### I MENSUMEMM RAMMEMOMMEAMMEMEMMOIMMEMMINILMEMINIMM EMMINNEEMMEMN mommiummimmummumummumummimmummu mmimumm

• mummommommommasmummummommommu rammum MEMMEM•ME•MINI•MEMMUMMENNIMMIMMEMMEM EMEMEMAMMUM MMENEMMINIMEMEMMUMMEMMEMEMEMIMMUMM EMMEMMEMMOWIMMII MEMMEMEMMIUMMEMMMEMMEMIMMMINIMENINIMMMI NIMMEMMUMMIEN mommommumimmummummommummumminum mammumm MEMEMEMENIMMEMIUMMUMMEMMOMMEMM EMMEMIUMMOMMINA IMMEMMINIMEMEMMEMOMMIMEMMOMMEMOMMEM MOM M EMEMOSOMM EMMEIMMEMMOMMINIMMEMNIMMEMEMIUMENI NIMM~MENTANAM 

## IMMEMMIIIIIIIMMEMIIIIIIIIIIIIII1 IIMMIIMMUMENINIMM 

### P.P•IMEE* 2 =s7.17.11 1 .1 111•1 11 .1 111.11 MMI-J fi PAINE 

### Elne 111•11•111MMIIIMIIIIIIMIIMII 016 %•••+ 111•111•11•111•11•11•••• MIUMMUMEMMEMMIUMMEMEMEMMEMMEMEM MEMMENIIMMEMMIRMSIO MIONMEMNNWEEMMIIMMMEMMOMMIENENU MMEMZEIVEMMUCA MUMNIMEMEMOMMEMEMMUMMEMEMEMEMMOMMO MMI 

### A MMIXONSUME mmummummummimmumminiumumminimm mOimmum TIIIIIIIVIIIIIIIIIIIIIII1 1 1 1 111111 111111 

# 1 111 11 111
W Wm mu imommismo • MUM 

### M MMENNM MIIM MEM comormommemmummummilimmummummunimmu m m omm nwpmerommummimummin•E mmimmummummummummEms• imminlammimmimmimmomm mmmmmmmmmmmmmmmmmmmmmmm mimmo••immu•m•mmommummimmummummu mmimm MESIIMMUMMMUMMEMMOMMMEMMOMMEMENEMEMMO MMEMINIMMEMMUM MEMEMMENNIMOMMINOMMESNOW•mOMmumMilm 4 

### mmir liagia2MMIMEM MMIIMMEMEMOMMEMIMMEMEMMEMOMMEMMOREUPW AMMEMMEM summmummilmummilmommirmwomma 5 mialmmg rommin mumummilmmummummimm misimmisammommilimm mummummummummummummummwomarmilmum ummin MINEMEMEMMUMNEMAMMEMEMMEMMUMMIM I ATZMEM MSOMENNEMEM MEMUMMIMMEMEMMEMEMMEMMENMEMENSIMEWIWIMEM EMMIMMUMM EMENEMEMMINIMMEMEMEMINIMMUMEMEMMIll!M EMEMMASEMEMEME MEMEMEMEMMEMOIMEMMEMMENEMMEMEMOIMMENVSO MMEMEMMINIMMEM IMMUMMEMMENIMEMEMMMEMMEMMEMEMMUNWPM MMENMWMEMEME MEMNEMOIMEMSEMMEMMMEMOMMEMMEMMEMMOMM UMMEMMEMMINEN

• MEXIMUMMOMMEMEMMIMMEMEMEMEMMEMEMMIN IMMEMEREMMEMM PIMMEMMINMEMEMMIMMOMEMEMIMMOMMINIMMAIMM OOMMAIMMENN VEMEMEMMEMEAMMININEMMLaMMEMMEMMEMMUM EMINEMMIMEMEM MEMMEMMIIMMIENMEMEMMIMIMMOMMOMMEM •IM•IMMEMM•MM•M MINIMMIUMMEMEMEMEMEMMIMMINIMINMAMMINIM MMUMMWSMEMM MUMMOMMWOMMMUMMENEMMIIMMEMMIEMEMMEMMU MMEMOMMUMME MENOMMEMMOMMEMMEMEMMMEMMIUMNUMMOMMEM MEMEMENIMMEMME MMINIMEMMMEMMEMMOMMEMMEMMEMEEMMEMEOMM ENEMEMEMMEMMM MUMMOMMENIMEMENMEMEMMEMENEMMINIMMEINAM MEMMQVIIMMEM ORNMINIMMEMMOMMEMMIIMMEMENIMMUMMUMM EMMMINIMPUMMEM EMEMINIMMEMMEMMIMMEMOMMENIMMEMEMMUMBO MMEMMINIEMMEM IIMMEMMEMMEMENENMEMEMMOMMEMOMMOMMINIMM EMEMMEIMMEMME MEMEMEMEMEMMINIMMIIMMMEMOMMIMMEMEMEM••M •SE•AMMUM•OM IMEMENENEMEMENMEEMENEIMEIMMUMMEM EMONWIVINEEMME MINIMMEMMINIMEMEMMEMENEMMEMOMMUMUMMEM IMMEME 

### n gUMMMEM imumm•••••o••uni •mummim•i••inammom• um m miii MMEMEMMIOMMSE•ME 

### N.Northshore Mining Company Line 12 Waste Gas Stack 12/20/00 

# 1;;;;;;11111 1101 1 I I 001 I 1 II 1111111111101111 

# 111111111111111111111010111101011811111101111101011111110100111 011111111011111 11101111011011111111111111111MINIENNIIII momumorn ino onumpumpummoidintomoliumununol 

# mouumum uppowinunumummoofinummommumpoom 

# 1 1110111111411111111111111111111111111111111111111111111. 1 

# Iiii opproreptlipiliffirri
1 1 

# 1 II 1 1 I 

# I 1 i l it 

# t 

# 10111111111111111 1111 .40.,, 

# 1.11 . 

# I I; 19 i 11111111111 ' I 1 

# IMIttillillt ! r, 

# till 

# II I I 11 1 1 111 1 1111111 11111111111111110111111111

, I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I I IIIIIIIIIHIPPPIIIIIIIIIIIIIIIII 0111011111101011111111111h1111011011111110111111,111 100111110110111101111110001111,111111111111111111111111 IIIIIIIIIIIIIIIIITIIIIININIIIIPOIIIIIIIJIIIIIIIIIIIIVOIIIIIIIIIIIII mommum mphondbigmegmaskiimmorni 

# 4 iiihi 1 Ink Ail 

# mosimoulloopliiipoigligompooroug uummumoupwidumutur lir CUNHA& 

# hathinfilimm iiiiikia 111111111111111111ffil 101111111111111111111111111111111111111111111111111111MMINEffil 

# uumulmuni bounmipproinurmummmunomoummpun

0 81 

# IN 

# Oil FA 111011111011111 I II 1j1)61101R00111011011011111101

mono dommiumitilliliidegilliffillUdiiiiMigidamunummulli 000111010001100111100101111011110101101110011011101111001111011011011 1111011110001110011101111011111010111101111011000101101111 ' mom union 111111111111111111111111101001111111111111111111111111111111 11M111111111111

### Northshore Mining Company Line 12 Waste Gas Stack 12/20/00

(-- 

# 111111111111MOMIM111111011111161111011111111filiiiiilid11111111INIMUMEMIll 11111111111111111111111101111MMIMMUMMEMINOIMMUMMIMMEMffil 11111111111111111111111111111111111111111111111111111111111111111111111111111111111011111111111111 111111MMUM11101111111111111111M1111111111111111111111111111MMIMINIMMUUNI 11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111 1111111111111111111111111MINIMMEMINIMUNIIIIMMIMIIIIMIEMIMMI 11111111111111111111111111111111111111111111111111111111111111111M1111111111111111111111111111111 111111111MIIIMIMEMINIMMINMEMMIIIMINMEEMIIMIMMIUMffill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ffil 11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111 ON11111101111011111111111111111101MMINIMMUUNIMINIMMIMMIIMM0111 1111111111111111111111111111011111111111111111111111111111111111111101111111111111111111111111111111 11111111101111111iMMUMEMNIUMMEIMMUMMIMEMINIUMMIMEd 1111111111111111111111111111111111111111111MMIMMINEMMIIII111111111111111111111111111 

# ummouummommummoommumumuumuummummmuumml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r 1111111111111111111111110111111111111111111111111111101111111111111111111111111111111111111111111 111111111111MINIIMUNIMOIMMIIIMMEINUMffinfitHERIMMUMMLI 11111011111111111111111111111111M11111111111MOIMMIMIIMMIIIIMMIUMIffillffill 

# nommilmommommumummumwmummmumumummmumunum IIME1111111111111111111111111111111111111111111111111111111111N11111111111111111111111111111111 MillifilitallIMM1111111111111111111111111111111MINIMMIIIIIIIIIIMMIMIffilffil i1111111111111111111111:011111111111111111110111111111111111111111111111/11111111111111111111 .111111111110MINIIIINIMMUMEMBIBMIMMIMMIMEMMUMIffill 1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111HIMMU 1111111111111011111111111111ffiffiffillinffillINIENNANNIIIIIIMM11111111111111 1111111111111101EMMIMMIIIIIIIffillifillIMIMMIMMIMEMMENOMMO 

# 11111111111111M111111111111M111111/1111111111111111111111111111111111111111 11111111.14111111111111111111111111111111111111110111110111111111111111. 1111111111111111111111111111111111111111111111110111111111111111b011 1111111111111

111111•111111111111111111111111111111P 1 11,1111P 111-1111111111111/11111ril111 111111111(111 ill11111M1 111110011M1 11111111110

### Northshore Mining Company Line 12 Waste Gas Stack 12/20/00 

# 11 1 

# 11 1 

# 111111,1 11 1 

# 1 1 ,111111111l l



# .
_ I 1 1 11 111 11 1 1101 1 1111 101 00 111 11 01 1111 1111 1111 10 1111 111 11 11 101 111 1 

# 11 11 

# 0 110 

# 11 110 

# 1 111 

# 1 1101 

# 1 01 

# 1 111 

# 11 01111 

# 1 11111 

# 1 111 

# 11 011 

# 111 1 1111101111110 111101110 111111111.1110111111101111011111110111111111

I 

# 1011111111111 111111101110110111111111111 1110110111111111 

# 1111 El 11 0011111111 1110 III EMI 001111 111 1 1 

# 111r w ri mi rrill immu ir m r imu rrir 

# ,,1

1 1 l ag El 11111 iti n 51 

# 1111111 0111001111011111101111111111001010111111111111olopoR 

# 11111111111111011111111111111111111111 1111111111011111110101111111111111110111 1"""" 9110101111011111111111100111 1 10011111001 

# 1111141111111111111111111101111111111111111110111111111111111111111111111111111E 1016111111111111111111111111111111111111111111111101111 6

### CO 2 Output Northshore Mining Company Line 12 Waste Gas Stack 12/20/00 02 

### Output



# Urn HUM 01111111111111 11111111111111111111111111111 1111111 11111 MINN I NEM 

# 0 0 ill 0 011111111110111111111 III I 0 0 I 111111 .11..uoim.u...nooLlum.o... 1111111111111111 

# 111111111111111111111111111111111111111111111111111111111111111111111111111111111111 

# imomillommelmmoppiimoommommomi 

# 111110111111111111111111N1111111011111111111111111111111111101111111111 11111101111111111111111111111111 1111111111111111111111111111110111111111111111111111111111111



# . - - - - ---1
, ..011.111 II 11111 1 1111111 111111 11 11111111111 1111111 1111111111111111111111111111111111111111111111111

.2. 1 l 

# iffilii1111611111111 11111111M11111011111111 iiiiiiiifibliall1111111i 

# 1111111 i 111111111 

# 11 1 11111 1 1111 1 111111 1 111111111 1 11111 1 111111111111 1 1111111111111111111111 1 1111111 

# 1 111 1 1 1 11111 1 1 1

1 1 1 1 1 1 1 1

11 1

11111111 

# 11111 1 11

1 111 1 111 1 111 1 1 1 11 1 11

1 1 1 11

1 1 111 11 1 1 1 1

1 111

1 1111111111 1 11111111111 1 1111 1 111111111 11111111111111111111111 

# 11101111111 111 1 11 1 111110 1 11111111 1 1111 1 111111111111111111111111111
11 II 

# 111111111 111111111111111111111111111111111111111111111111111111111111111111111111111111111

. 111 11 1 1 IIIIII IIIII0

111111 111111111111111111111 111111111101111111111111 III 11111111111111111111111111111111111111111111111111111111111111111111111 1 1 1 1 1 1 1 1 1 1 1 1 1 1 

# 1 11 1 

# 111 I III 11111111111111111 1 1111 1 111 11 1 11111 01 11 111111111101111111111111111111111

### CO 2 Output 0 2 Output Northshore Mining Company

Line 12 Waste Gas Stack 12/20/00

, 

### g i ' i • 0 

# PLINNENINg It I giiillintabliMINIMMIM1111001061111111110111111111111111 1 Full I 

# r gr ' i 

## f I 

# I 1111111111111111111/111111111111101111111111111111111111111111101111IIIIIIIIIIHINIIMIIIIIII 11111111111111111611111111 PI I AMP' If ' 11 1 1 1 t "T

. airing' 1 

# g' ' '

I ' 1 

# momonmoiifinummummuummumummiliiikimmiimgomom hu 

# qm u hm r; NIII I I I 11111111 IIIIIIIilh 

# umummumnommummommoomonvoinitmorwin

0 11111.. AIN ,4111111111121 ■ 1rniiii MiltSWUM 1111111111111111111MMINIUM 

# Innisainginsiumummummiumoneumuumummunmullon I(IIIHhIIIIIIIIIIIIllhIIIIIIIIUIPllUuIIIH000 lIIIIlIIHlI IIuIlIIIIIIOhIII 

# 01111111111110 I NM 11 11011111 Of Mk' , 1 

# ihdiNiE111 

# 1
-p 

# ,

11111111111111 11 I I

111111111111 11111111111101111111111111111111111111111111111111111111111 

# 11111111


# 1111111,1111111101 i 1 1 I 

# 1 

# i 1

I

1 11111 1 1 1 1

1111 11 1111 

# 11111100111 111111111111111111111111111111 1111 111 111111111 1 111111111 01111111 1111111111111111111111111111111111 HI 111111 IMRE 111111111111111111111111111

1111111111111111 IM11111111111101111111111111111111111111111 111111101111111111111111111111 . 1 ! 

### i4 

# II I

### Northshore Mining Company Line 12 Hood Exhaust Stack 12/20/00 NOx Output

rimis n MEMEMEMEMMEMEMEMMEMMEMEWAMWM6EFEEMEEMEEMEEMEMEMEME •MEMEEWERWEEMEM•EEE••M•M•••E EMEME•EMEM••••EMEM•••EMEMEMEWEE•ZWEE=IM•MEMEME••ME MEMMINEEEPOEMEMEEMEMMEMMENEENEMEMEnrWMEMEMEMEEMEME EMEEMEEMEMEMMEMEMEMENEMENEMEMEMEMEWAMEMEEMEMEMEME LEMEMENEEMMEEMOMMEMEMEMEMEEMEMEMEMEEMEMEMEMEEMEEME milommommummummummmummummimmummmommummm. REEEMMEMMEMEMEEMMEEMEEMMEMEEMEMEMEMEMEMEEEMMEMEEME MEEEMEMEEMMEMEMEMEEMMEEMENEMEEMEEMEMEEMEMEEMEMEENE OMEMEMEEMBEEMMEMEMEEMEMEMEEMEEMMEMEMEMEMEMEMEEMEEE MMEEMMEMEMEMMEMEEEMMEMEMEMEMEMEMEMEMEMEMEMEMEMEMEM ME•E•ME••MM•M•MEM•M•••EEMM•E•MME•MM•M•••••ME••EE•M EMMEMEEMEMEEEENINE,ZEMEEMEMMEMIEMEEMENEEMMEEMMEMMM mormarmilimmommia-amwmorcswarmammommumummum mummummummaimmmammillimisaimmmummimmommuum

• EMMEMEMEW4EMEEMMEEMEEEMMEMEMEMUWEEMMEMIEMEMEMEM
• EEE••E•EENMERE•E••M•••••M•MEEM•LEM••E••E•••••E EMEMEMEMEMPUEEMMEMEMEMEMMEMEMEMMENEMEMENEEMMEMEMEM MEMEMEMMEMEMEMEMEMENNEEMEMEMEEMEEMEMEMEEMEMEMEMEEM EEMEIMEEEMNUEMMEEEMEMEEMMEMEMEEEEEMMEMEMEMEMMEEEM MEEEMMEEEMPEEMEMEEMEEEMEMEEEMEEEEEImEMMEMEMEMEEME EEEEMEMEEMMEMEMMEMEMEMEMEMEMEIMEMEMENEEMEMMEEMMEEM ••••M•••••EME•E••••EMEEMEMME•EMEN•EME••E•EMEM•ME• ••M•ME••••LI•••••MEMM•M•ME••ME••MEMEM•••ME••MEM••• =EMMEN' NEEMEEEMMEEEEMEMEMMEEMEMENEEEMEMEMEEEM 

# ••1•11•••11•1•1•••1•11•1••1•••••••••••1•1••••11•• EMEEMMEMEMMEEMEMEMEEMMEMEMMEMEMEMEEMENEMEMEMEMEEME MEMMEMMEMMEOMEMEEEEMENEEMEEMEMEMEEMMEMEMEMEMEMEMEM MEMEMEEMEMEITEMEMEMEEMMEMEMEMEMEMEEEMEMEMEMEMEMEMEM MEMEMMEMEMENEEMEMEMIEMEMEMEMEMMEMMEMEEEEEEEEMMEMEM MEMEMMEMEMEnEEMEMEMUMEMEMMEENEMEMEMEMEMEMEMEMENEME EMEEMMEMEMENEMEMEMEMEEEMEMEMEMESEEMEMEMEEMEMEMEMME MEUMMEMMEMIUMEMEMEEE EMEIMEMENEEMENEMENIMMEMEMEMEM NEmEMEMEEPWEEMMEMEEE EEMEMEMErOMEMEMEEMPEEMEEMEEME alummumrsmilimmilm mmillimmiammommummummiu 

# 1

MUMMEMEMMEMEMEMMEMEM MUM REMEMEMEMEMEENEEMEMEME MEEMMEEEMEWIEEMEMEEMMEEMI MEUMEEEMEMMEENEmmumrn MEMEMEENEMEZM EMEMEMEMEIEMEMEMEMEIMEEEEEEENEEMEUEM EMENEMEEMErm MMEMEMEHEEMEMIMEMEMMEMMEMEMEMEEMEmEM 

# I =MUMMER ME EMEMENEEMMENEEMIEMEMEMENEMEMMEEEMMEM NEEEMMEEME AM MEMEMEMMEMEmEME mmimmommommommumms im nommompammmummummummi minimmommommummi mommommgi mmom immumummummummommumm mommummwmormi MMUMEMEMEMMEMMEMEMMEMEMEMEEM EMEMEMEMEMERAMEM IEEE•MigNEMEMMEMEMEMENEEMEMEMEMEME 

# 1 UMIEMEMEEMMEMEE EMU EimmEMEMEMEMMERIEMmEEMENEEEMEME EEEMEINEEVieNENEEEMEMEMMEMEMMEMEMEMEMEMEMMEEMEEEM MEMEMEMMEMEVEMEMEMEMEMEMEMEM MEMENUMEMEMEMEMEMEMEM MEMEMEMMEMEMEMEMMENEEMEMEMEM 

# I
MIME EMEMEmEMEMEMEM EMEMEMEMEMEMMEMEMEMEMEEMMEMEEMMEMEM mopmmummommom 

# 1 mmummummmwmommummumwwwwwwommom•mmmommmummmom MEMMEMMEMMEMEMMOMMEMMINIMMEMMEMEMEMM MEMEMEMMESEMEM MEEEMEMEEMMEMEMEEMEmMEMEMEMEEMIEEEEMMEMEMEMEMEEEEE EMMEMEMEMEgaMMEMEMEMEMEMEMEMEMEMMEEMEEMEMEMMEMEEME 

## IIIIIIIIISIIIIIIIIIIIIIIIIIIINAIIIIIIIMAIIIIIIII1 .........N.N............... m . m ............m i mm. • ...•..•.•r..•••mw•••••....•..•••....••••.•.•.. ..........A......1.........mirm...r....... immilimmme mom' Implomplm. momm.mom mmommilmm MEMEMEMEMEREEMEME 

## • MENEFEE.= EMMEN 

## • MEMEMEMEEE
EMMEUMEmEM MEEMEMMEMEIMEMEMMEMI ME MMEEMMEMIMEEEMIEUMMEME NEEEMENNEE RMENEEME ME momMEmEMMENEEMEME EMEMEMEM 

# I AMENEMEM ENIETEMEMEEMMEMEME MENEM. ENEMEMMEMEMIEMEMMEm ME pp mpommpommommemommommmm mummmmmimptmmommpmm mm m. mmmmmummommmommmummmm mmompomm mmnpummmgm popmemsmmummmmommummmmumm mourn' mmEmmimmomm mmmompommommm EMEMMEMEMEMEMEM MEMEMEMEMEIMME MEM MEEMMEMEMEMEM EMEEMMEMEMEMEEM 

# I MEMEMEMEMIENEE morn EMMEMMEMMEMEE EMMEMEMEMEMEEME EEEENEEEE-woMEMEMEE EMEMEMEEMMEEE•MEMMEMEMEEMEEME

MM nommommommwommmipmp mmommmEmmommummummommommumm HEMEMMEMEMEMEEMikW ImirOgIENNEMEMEMEMEMEMEM MENEMENEEMEMEMEMMIN mEki 

# 4411A pimAMINEMEMEMEMEMI OMMEMEMEMPEENIEME , MEM MEM 

# hm EMEMEEMMEMEMEMEMJ limmmummmommunimmomm mmm mom mmummummommommomm pummommmmimmmommulmmmom mwmpommmommmommummumwm elommillum milmmill mmmmmm EE miemil mprommimmummum mormimffiiiimiimmirm ,i_ mmemmilmmammummiumm 

# I
mom mmommommumm MEM 

# FIN ENEMENEFEEMEMMEMMEME PENN NEMMERWINNEMMMEE MUM MEE MNEMEaMOMEMMEMENEEME nmmemmummtmsniamMUMMummommommommommommommummummm wmpmmnompirmgmmulmmommimmommummommommimmommommm ME.MMEMEPE mmmommomm mums mmummummmommmummommm 

# ograunfig mom= 

## ...11.1110.....1........ml

all• mmommummummommmmmonnum MEMEMEMENEWffil We:2MM= mommummommommommommmumm mompmmunimilmmenormmum mmummummummmmommmmmmi ImIlimmimponnimiantonmm mEMEMEMEMEMEMEMEEEEM MEN 

# N INN NI mum 

# N EN EEME MEMEIMMEIMI u MEMEMEMEM i mi 

# Ilp imp ilmimmom imili u mmmmimmom mom pmm • mommmmomm 

# Arm w • • mm mmmm

" 

## VIIIImmIle 

## 911111,1111 

# maw pii6p4,..mp mommommom iimEmillmiiiiii 

# MIMI 1 mIlk1111111111111111111 mmemipmmem 

# I mmompliminapom 

# imp" 1
mm•imm mm mmmmimmmmmmom mmmo mftmmmillica mom mmmm mmmm mm mom mom moms mom rWmmmmpm imam i mi

u

mmi minimum mm'ImmIrprimmpimp mmom pwmp p•pm mmm mm Immipmummomm INENUE/CM,MMMAMA EmElimEEm • mE MEM NM EMMEMEMEMEME - EMEEMEIMEMEEMMMENEE MEIN ME MEM mmmmommommmmmi mmos mmommmmimmom mum mommummommmummmummommmmmpmm mumnsormammul morwrimmwsrmimpsimm- mmumummumgpm aminmopmanWpit mmwrionummoweagmmomm- MEMMEMMEMEMMmAR UREMAmEMIIEWM EMEME_AMEMSOMEEMEMEM • MMEMMEMEMENEMEMEMEMEMEEMMEMEMPEMEMEMEMEEMEMEMEMEM EMEEMENEMMMEMMEwEEEMEMEIMEEMEMEMEZEMEEEMEMEMEMEEEM mommummosimmommNimimplim milimmdmommummmommeammem EMEMEMEEVMENEME•PMEMEEN EMEWEEMEWOUMMEMUUSMEEMEMEM
• mmwmommaam•ommammem•mommunimmimmummumminimmommomm EMEMMEMEMEMENEMEMEMEMEMErEP MEMEHMEMESEEMEMEMEM •••••••••••••••••1•••••M'wligraDAEWESZEMEEMEIMEEMEME mommummummummmomm MEMEMEEEMEMEMEWEEMMEMMEUM A••MEME•EMME•EMEM••EEM•EMEMEMEMMEMENEMEWEEMEMEMEAU MEEEEMEEEMMEEMEMENEEEMEIMMEMEEEEMMERMEEEEIMMEEM 6MEMEM=GMEM mm EMMEME2 m 

# == m g2E m MO ' 77MX=MmMEEEM EMEMEMEMEMEmmEENNEEEEMEMEmEMEEMEMEMEIMMEMEMMIUMEM,; MEMEMEMEMENEMEMEEMMEMEMEMEMEMEMEEMEMAoWapOMEMBEEM
• EMMEN M ME •U ME ME•EM•E•E' IRS • • IEEENorthshore Mining Company Line 12 Hood Exhaust Stack 12/20/00 NOx Output

immUNMER I CAMMUMOPMEMEMIUMEMMEMBEINMEMEN 

### CM MOMEMENDOMMEMINMEMMEMEMEMMEMEMMEM luMEMMEMMEMENOMMMEANCENEMEMEMMUNNEMEMEMEMEM HIMOMMEMEMEMEMINEEMEMEMEMEMMINNOMMIMMEMEMEMMEN MUMEMEMIIMEEMINMENEMEMEMMEMBOMEMMUNMEOMMEMMEM MEMAMPICOMMELMAMOMMINMEMMENIIININEMIUMMEMENN WEMMIEMNAMMWOMMUNIMEMMUMBERIMMEMEMENMEMENEE MIUMUMNEMEMEMMEUEEMMEMMEMEMOMMENEMEMINMEEMMEM 

### MR PINIIIIIINMMMMMEMINMMNMMMEMMMMMMMMMEM mommommunimmomimmaiminmommemsnwpmmunwommumm WIMMEMMAMPIMENOMMENMEMMIIMMILMMWRIOEMORAMORMEEDI NMEEEEEENMMMMMNMMMMRPNENMMWMMMNMNMNMMUMUMMMMEREMMM 

### IMMINMEMMUMw mm mR010me4MMUMWAIIME,PREMommilimummilmo IIMEMNIimMOMENIMMSEMMEOMMRCINAILMCAMEMEMEMEMERNMENE MENIMMEMMEMMEEMMOMMEMMEIMMEMIUMEMUNIMUMMEMEME IMMEMEMEMMEMMEMMEMENNUNCEMEMENIMMEMEINIMMEMEME IIMMUNINNUMIMMUMNIWINFMMMREEMIMINEEEMMEEMMUMEME


### i WIEMEMEWMPROMMUMMEEMENMEAWMIMMOMMEMIUMEMEE= 1 

### , MEMEEMORMEMWEIMMUMEMIUMIMMIE MOMEMEMMEMEEMEN MMEMMEMINEMMEMEMEMEMMESNMEM MENICUMEMEMONMUM mommimmmomminimmommummin EMEMEMEMMEMIUMMEMEM IMMEMMEMLIMINNERMEMEIMEMMIWOMEEMMIUMMEEMI MENENMENEMENUMENIMMEMMUMMIUMEMMEEMIMMENUMMONNEM MEMMEMEINUMMUMMONEMMUMMINUMEMEMEEMEMEMOM IMEMMEMEMEENEMENIMMUNMEMEMEMMEMEMOMMIMMEME MEMEMMUMENW2MEMIMMEMIUMMUMMUIREMEMEMMEMMEMI mummumummammummimmummommommommummenimm MEEMEEMEENOMMEEIMMEMEMMENNEEMEMMUMENEMMOMMENE MIMOMMUMEMMUMMINEEMEMEMMEINUMEMEMMINIMMEMEMN ImEMEMENMEENNIMMEMEMEMEMEMMEMENEUMENEMEMOMMEMEMM WOMMEMMEMPAICOMEMEMMEMMEMMEMEMESMEMINEEMENEMEMENIC mmommommuwirommumummommumummummommummom ummummummumommummummimminummmummommk IMMEMENENIFICOMEMNMEMEMEMEMMEMOMMINEMOMEMEMMUF MEMEMEMEMELMEMEMENEEMEMIMMEEMEMMOMMESEMINEMEE MINEMMEMEMMUMMEMMUNEMEMIMOMENIUMMINEEMOMMEMEMM MMEMMEEMEMMEWEEMEMEMEMMICIMMEMEMEMENUMEMENEM IIMMMINIMMENWAIMMOIREMMIUMINMERMIENMENEMEMIUMMIMMOMW MEMMEMMEMEMOMMEMEMMEMEMEMOMMEMMEMMEMMEMMIMMOMMEMEM MEMEEMENEIMAMMEMIUMIUMOMENMEEMMEMUMNINWEEEM MEMMEMMINNIPMEEMEMEMEIMMEMEMINMEMEMOMMIMMEMM" limmilEUMMOMMENEREMEMMENSNEMEMEMENNMEEMNEMMEMININE' IMMENEMEMEMWMINMEMEMENEMUNIUMEMMINEMEMMUMMIUM ME•••NUMIE•EN•N•INU••ENEMEIMIEMEMMEMMONOME INIMEMINMEMMEEMEMEMEMEMMEIMMEMIMMEMUNWIM• INIMMUMENEMAMMUMMEMEMEMEMENIUMEMEMOMMEMEMMEM INUMNIMMORMEMMUMMEMEEMUMMEENEMEMEEMMEMEMEMEMEM IIMMUME•UMMU•M••EN•MEMEMMENWIMMEMEMEMEEMME OEMEREMENLANNEXEMEMEMEISSUMMIMMUMMENEMEM. MEMMENUMUCOMMEIMILIMMEMENIMMEMOMMUNICIMEME AMMOMEMINIMEMMEEMEEMIMMEMUIENEMIECAMMEMIC MEMEMEMEIPMEMMUMEMMEMMEMENEMEMMEMMIUMBEE= MEMEMEMMEMMINEMEEMEMMEMENEMEEMEMUMENEMEENMEMEIMEM MOMMEMEMEMAIMMEMEMINUMINEEMOMUMMEMEMEMEMEMN MEMMEMBILMUNMEMEEMMEIMMUMMENEMEMMEMMOMMEMEM MEEIMIUMEMERMIMMAMMIWOMOMMUMEMEMEMMEMNEMEMEM MEMMEMEMEMENEMEMUMMEMEEMMEMEMIUMMMEEMENUMM EIMEMEMMEREEMMEEMEEMEMMEEMIUMMEMEMMEMMINE MMUMMINMMOVAIMMIMMIMMEMMEMMUMMEMMINIMMINIUMMEM MMEMMMINIMMEMMEMMEMMEMEMEMMIIMMOMMEMIUMMIWIMMEMMEM MMEINIMMEMOMEMEMOMMEMMEMEMUMMEMMMENNEMEMEMMOMMEMME MMEMEMMINIMMUUMMOMMEMIMMOMMEMMEMEMEMEMMIIMMEMMEMM • MEMMEMMEMO••E•EMMOM••M•EMME•I•E•M • MEMMINUMMMEMME MEMEMERUMMEMEMMUMMEMEMEMIMMIMMENIMMEMEMMUMINNE ••M•••M••MERV•NE•OMEMEMLUMEMEEMEINIMEIMMUMMUM MEMEMMEMMORMEMIUMENMEMENEMEMEMEMNUMMEMEMMEEMME
• UMMI•E•M•NUMEMMUNMEMEI•EMMUMMUMMIUMEIM NUMMEMEMOMMITMEMEME IMMEMENMEMMOMMEMMINEEME MNEMEMBEVOLOM EINUNOMEME MEMEMINU morimmiummommonnommum 

# 1 amommmmommili MM m mmummommummi.mmimmomummommimiu MEM UMEMEMEMEMMEN MUMWMENEMEMEMEEM MININEEMEMEMM IMMEMENNOMMINUN MMEEMNIMMINMEM IMMUMNEEMEMMIEUEMEMMUNIMMEME EMMEMEMMEMMEMEMEM milimmimmilsimmommummilmmummumimmummomm immuummmammiummummumummmiummommommumms immumommmumnimmummumismommumminimmimmomm mmummimmummommumminummimmumnimmumm mummummmummommum mommilimmummommumumm immimmummirmaimmimmin immummi m mminimmommum milimmummummummummommummimum•mommumm

mom miumummormimmimmummommommur um mommommum Immmumummummi mm mmi m sm mmu imommi immunimmommumm mummumminmi ium mommommummummin mommummmimmAimm ms mums mmommommommimmmou simmmummimmwommommummommummummmiummomm emsram------mommtpAsmorminviummommummammmumm miumemmommillammum-ammirmaimplummmumm mummommummmummommmos EIMO:=MAMMEMMEMEMEMEME mammommilimmummumminium moommulgswirlummmummem AMNIMINIEWAINNIMENEEMEMMERNMEMENEMIWA4AMENEMMEAU MEINIMMEMMOMMIIMMEMMEMMEMMEMMEMEMMEMINIAMEMMEMMEM MEMOMEMMIRMIIMMENNIUMMEMMUMMEMMEMMEMMEMEMMUMMEM MIME EmmIEMENWEEMMEMEMMEMEMOMMUM MIUMMEMEMMIUMMEMEMIEMEMMOMMEMEMEMMEMMUMEMENN EMEMEIMMEMEEMEMMINEEMEWIWMWESIMENIMMEMMUMMEEM moms mummummarmummommuumm ommummommummummummummimgwommummommumm umwmpampamminommommummmummumnpriummummomm HOOMM•INIMOMMMU•MEMMII••E•M•MMME•MENAMMEMEMEMMEMEN UMMEMMEMEMMEMEMMMEMMEMMIUMEMMUMMEMMUNOMMOMMIMMEMM MEMMEMMEMMEMEMEMEMMIUMMEMMIMMOMMEMOMEMMEMEMUMMEMM WINIMMIUMMINIMMIUMMIMMEMIEMMOMMEMMEMEMEMONMEME WIIIIMMEMM••MU•MEMMTEM•MME••ME•EMMEMMIMEMMEMEM SMINIMMEMEMMEMMEMEMMOMM MMEMMEMMEMEMOMMEMEMMEMMEMEM 1.1111111MMUMMIIMMOMMMEMMEN mumminimmummilimmummim mummummummummimmummemmmimmommommummm mmilmmommummummammummoommwmummummommimm ImmuommorRanammaramplormsrwarommummommmum milmommummuldwerammidadaymemmommummummul M EMEMENEMIMMIIIMMEIMMOMMISMOUWARNIMMEMEMEMEMN sumumminummommusimmuminm INEWUEMEMEMINEEMEN ••M•OMM•MIPMEMEEM•M•EMEMEMIMMOMEMMEMENIMMEMMI EMEMMINIMOMEMIUMMUMEMIUMMOMENIUMEEMMOMEME ENEEMMEMERNMEMMUMMEMEMMOMMEEMOMMINEMMEEMEMMEM EIMMEMINEMPIAMMEMEMMEMEEMMINIMMUmmamEMOMMEMEMMEM MIONOMEMMMIIIMMEMOMMIENIMEMMEEMEMMOMEMIUMEEMEN IMMOIMMURAMIUMMEMENMEMINEMOMMEMENEMMENEM MIUM MEMICIIMEMOMMUMMINIUMMEMNREMENIEMIUMEE MN= MEW NIUMEMMEMEMEn MEMNIMOMMOME MIME • ME INNEMM4 

### II • • •U • Elki • • MIME • MOM 0.)

### Northshore Mining Company Line 12 Hood Exhaust Stack 12/20/00 NOx Output

mummoommommmummomm mom. km. mmmmmm • Aummammarammummummummummummummummummomin g kkikekkkkumkkoommemmummumnimmmommommummmommos 111111111MMINIMMOMMEMEMMOMMEMMIIMEMEMINIMEMEMMINIMMEMEM MEMMUMMEEMMINEMEMEMMINIMMEMMIIMMEMENIMEMMEMOMMMEMMEM MMEMMEMENUMINUMMIMMEMENIUMEMMEMMUMMEMMINIMINIMMEMN MAIMMUMMMUMMEMEMEMEMMEMEMEMMEMENMEMMEMEMMEMEMEMEMEM MIAMMINIMMENEMEMMEMEMEMEMEMMEMEMMEMMEMEMEMEMMEMMIUME EMEMMEMEMMEMMEMMEMMINIMMEMMEMENNIMMEMEMEMEMEMEMMEM EMEMIIMMEMEMEMEMMEMMEMMEMMIMMUMEMEMEMEMMEMMEMMEMME MINIMMIMMEMEMEMMUMEMMUMMEMEMEMMENNIMMEMMENIUMMEMEM
• MEMMOMMEMINIMMEmEMMEMMEMMEMMEMMMEMEMEMENME•M•••EM MUMMUMMEIMMIMMIMIMMINIMMEMEMENIONMEMEMMEMENUMEMMEMM IMUMMEMUMUM•MBEMBINI•M••••MM•M••MEMM•MEMI•MEM••••M• UWEEMEMMMUMEMMEONOMOMMINIMMEMMEMEMEMMUMMEMEMMMEN IMMEMMEMMENNMEMEMMIMMOMMVINICEMMEMMUMMEMMUMMEMEMMEM momommimmommummummummulrmirmsmwkamummsammommum MMEMMINIMMEMMEMEMMENNMOMMIIMMINIMEMMUSMMERIAMMEMEMMIIN niMiNmERwRiNERMIEWNEMINNEMMEMMEMEMUMMEMMEMEMEMMEME UME•EMMEMMENNIM•INI••OIME•EMM•M•E•••N••M••ENION•EMMEM INMEMEMONOMMEOMMINIMEMMEMEMEMMNIMEMEMMMEMIUMMEMEMEN ufmwmampaommommorm•ommo•micomm••m•vimmummum kmokummakmokummommmommummommummummimmumm mommommmummummumummommommummmommummummilmm ommommormoommommummimmumummommummummummomm mmummomminimmummilimmummumommummmumm MEMEMMMINIMMIMMEMMOMESENIMEMMMUMMEMEMMEMUMMEMMMEMEME MMEMMEMEMENWOMMEMMWMONOESOMMEMMEMINIUMMUMMEMEMESEM MIMUMMEMEMMOMMEMENUMMENUNENNANIMMEMMEMEMMENIMINIMME MEMIIMMEMEMMEMMENEDEMMEMOMONEMMINIENNMEMEMMEMMEMEMEM 1111MMEMIMMEEMMEMMEWIlaMOZWAIINEMEMMEMMINIMMEMMEMMENNME EMMEMMEMEMWMINMEMffiataNEMNIVIINPIMINEMMINIMEMMOIMMEMEM MINIMMENSUMEMINEMMUMMEMIMMEANWIMPROMMEMMEMMEMMEMINIM EMEMEMMEMEGICIMMEMEMSOMMENSEMEMMEMINIMMEMMEMEMMIMINIM INIMMENIMMINIAMMEMMENUMMEMMEMMEMMMIMMEMMEMMEMEMEMMM MIMMEMMIIMMIMMENUMMEMMEME•MEM•MINMEME•E•ME••NNME••M MEMMEMEMMIMENNMEMMUMEMENNEMMEMMEMMEMEMMEMEMEMEMEN IIIMMENNEMEMMEMMEMEMEMEMMEMEMENSWIMMEMEMUMMEMMUUMMEM IIIMMEMMEMMENCRIMEMMEMMEMMEMIMMEMMEMMMEMEMEMEMMINMEM mummilimmonrammummmummommmommummommommummo ENUMMUMEMENIMMEMMEMMEMMEMMENEMMENIONEMENUMMEMMEMEN NMEMMEMMIMMEMEMMIEWAMEMMEMMUMMINNIMEMEMEMMEMEMMW MIIIMMEMMEMMINIMMEEMEMMUMEMMEMEMEMENUMMEMMEMEMMEMEM MEMEMMENNEWIEMMIMMEMEMENEMMMEMEMEMMEMBEMMENNIONMEM momommummum&mommummilimmmummummummimummoom sommommowsmommummummummommummmommommums inimmummonommumummummummmummummommummumm limmummisommmumummummoommumummommummomm milmomommammmimmimmournmsmomommmummummumm misommiummummummommilmmmummommummummmomm • mommummineummum•unkkom•mm•mmumommommum MMEMNIMEMINAMMINEMMMIUMMEMMEMMEMEN•IMMMEMEMMEME•
• OMMEMMEMEMEMEMMEMMUMMENNEMMEMME•EMME••EMMUMEM•• MIIIMEMMEMMIIMMAMMEMEMMEMENNE•M••NEMMEMM•INIMMENNUMM•• MEMMEMEMEMNIMMNIMINIMMMEMMEMMUMMEMMEMEMMUMMOMEMEM MEMEMENUNIEWIMMEMEMENIMMINEEMEMEMEMMEMEMMEMENNEM MEIMMEMEMMEMMEMEMIMINENUMMEMMEMEMEMMEMEMINIMMEMMEME 111111MMEMEMMEMMUMMEMMEMMEMEMMEMMEMMEMMEMEMOIMMEMEMMINI MUMMINUMMENDIMMIIMMUMEMMUMM•MMEMEMMIM•MEMMINM•M•IN MEMEMEMMEMEMMMEMMENTIME•MEMMEMEMMEMI•NME•M•MMINMEM AMMEMMEMMICaNUMMENE mommommumummommorrimmummaN ornimmomminwommomm•mimmum••o•mummumminum••m mmummimmeammummommumommum••sim•mmumum•omm • mmilmmummilmorminumommin•u•••o•m•mmomm•• • immommismommommommoommisommummummummmom Emmommink i mmisummmomummmummkommommilimmum mommummummkp•mmu•mmuu•m•mm•mommummilmm milmommummommkumminmimmummommommommommumm • ommilmommina•mmikommommil•mgmummumumm•um • ilkommommkummkommilimmw•mommukom•umu•miu••o• MIMMEMENNMENOMUMMEMNIMEMEMUMMUMEMENNMEMEMMEMMEMMEN MIUMMIIIIMMENAMMEMENNIMMENNEMMEMEMEMEMMEMUMMINIMMEMN
• MEMEMEMEMMERIM•MU•ME•MINMEMMEMEMEMMEMENIMMEM•MIN•

• ENNIMMEMMEMENIMUMMEMMM•IMMEMENNEMMEMEMMEMMEMINEMM • mumminumakmilimmummiumm•mmum•••okommomm MEMMEMENNEMANIMMEMEMMEMMEMMU•MEMMOI•NUMM•MM•UMMEMEM MMEMEMMMEMEMMIEMIMMEMENNIMMIIMME••EM•E•ENNU•ME• MMINIMMEMENNEMEM MEMMENUMEMEMMUMMEMMEHMEMMEMMUMME MMEMMEMEMEMMEMN MEMINIIMMEMMEMMMEMMEMMEMMEMMEMMEM
• EMMEMEMEMINIMMEMEMM•IMEMMEMMEMMEM•IMMEME•EMEM•MEM roMMIIMMEMMEZMEMMEMMMEMEMENUMEMMIIIMMEMENCRIMMENN4 0
• IIMMEMENIMMUMENIEMEMINIEMM•MENUM••EMMENNAMEMME••OMME

• 111•MUMME•MEMMEMMUMEMEMEMMEMNIMM•M••EM•EN•MMEMMOM MEMMEMEMMEMEEMMMENEMEMENIMEMIUMMEMMEMMEMEMMEMEMEN EMMEMENUMEMMEMMEMIN IIMMIIMIMEMEmEMEMENNEMEMMEM MINMEMMEMMIMMEMIENNE•MMIIMMEMME MUMEMEMENOMMEMEMINIM MENNINIMENIINAMMENMEMM mommukg immikmmummummmom
• millimmommammumm••mommku•mk•um•omm•m • ookim•ommsram•ummimmom••mmimm•mmumommumin EMEMENUNIMMINIUMMEMMI•IMMENNIIIMMINIMM•MM••MNIMMEM M•I•••MEMEMMININ•EM•EMMEMEMMEEMMEMMENIONM•MMUMMEMM MEMEMMEMEMMAMEMEMMENIMMMMOMMEI•M•MMEM••MM•NN••IM MOMMUMMEMMEMMEMMEMEMMEMMINEMEMMMENNUMMEMEMMEMMEMEM IINIIMMENIMUNIMMENUMEMENNMEMMEMM•EMEMMIEMEMMINIMMEMEMN immummulOssimmommommumimmommummommommommi mommummommommommummokommeminummummommum mmommilimmemmommummummummumum•ommommomm
• oommummaimmimummegom•om•ommo•um•o mommommumikumikkommommkkommumm•ummomm••mommo MEMEMEMEMBLUMMENNIPSIMEME•NEMEMUMMINEMMINIMIMMMEMEM KRIMMEMEMPAIRIMMEM7=MIIMMMAMMUMMEMMEMMEMEMEMMi1 mMENNUMMENIMEMEMIAMSWAORNMMEMMEMMENIMMEMMEMEMMENN nommummommimmrsiskokimmu•mummummmu•mommom mummommurammommwmkomosomemommemmummummu milmmommummum•immignmaskommw.mmullmomommum••• moommummommumommkommirmammemarkomumpimmommom moommommummukkommummum•n•mimammo•mk•mmumm mommoommommommommummiumum mmimmummommommum milmommommemmEmmosommummum mokmommommummi miummommommksommu•mommu•om•ommummo••ummum MEMEMMEMEMPMEMMERMOPMEMMUMMEMEMEMEMMENUMMEMINEMEM B=========.114WWWWWMMEMMEMEMEMEMMEMEMMEMEMMMEN UMMUMMMEMINIMEMMUMEMWENMEMMENNUMMEMMERMMUMMEMENIMM IIMEMMEMMUMMIIMEMMENNEMMEM•ILMME•MEMME•NUMMENNUM•I MEMMEMMEMIIMMUMMENEMEMMEIMMEMIIMMEMMMINMEMEMMEMENNE EMMAIIIIPMEMMELAMMEIMMEMMEMMEMMUMMNEMEMEMENNMEMEM IMPAIMM.SUMWAMEMIMMINNEMMENIMMUM MEMEMEMEMMENEWM 111111111111111MMEMMEMIMEMENNIMIMMMINIMMMEI EMEMEMNIMMEMENE EMommoMmEmmmlomm malmEmmIMMINM INIMME••••ENNIMME••EMEME ummmummmis ror kr m wonirawsimmoomm 4 :U M

### Northshore Mining Company Line 12 Hood Exhaust Stack 12/20/00 CO 2 Output 0 2 Output 

# 1 11 III Ir!IIIIII1iOII 01111111 1111 1 H) 

# I I ! I



# 1 I 1 I 1 nummounnumummunommuummuumummummulliiiiiumi mummunnolosamommuummllommmulimmunompplummul olloommommuummummummomonmommensaucionnimuml 

# 111111,01111filIVIIIIMMON111111111M111111111111111111B111111111111111111111111111111 

# nimminglinummummummudommummminummumnimomm 1111111111111111110111111111111111111111111IIIMICHIUMW11111,M01111111111111111111111111 111

1 111 1 1 1 111 1 111 1 1 1 111111111 1 11111 1 11

1 11 1 111 1 0111 1 111 11 1111111111101111111 110 1 1101001 1 10111111111114011111111010111111111001111111111111111111 

# 111111111111111111111111111110 1 1111 10 111111111111111011111111111111 mmmomumil mmmmionuit 11; ol do I, amonompuilu 

# mimullunkummwilmEmbiligumummonsommonaloirill 111110011110111111111111111111111011111111111100111111111111 PIESIdiMINIMMINIMM111011111111111111111111111110M1111111111 

# illinoloomommolormoloomomillooromme ommillompoilimmooldpoloommoinFiliiiiit 11111111 II !mom mullnimommum ummumm 11111111111 

# 11111111i 11111111 '



# I 0 111001 111111111 1011111111111011111111001101111 1111111111111111111111111101 Th

### Northshore Mining Company Line 12 Hood Exhaust Stack 12/20/00



# I I



# l in 1 i I U I I I i 

# pig 

# IiiiiiiiHiNiiiiiiiiMiMiniiiiIiiiini 

# Mini 

# ii ill

IN pi II AP

, 

# IMMIMMINNHONFIP111111111111111111111M11111111101111 

# Ili 

# 1111111111 1 111111111111111111111101 MIMI 1111111111111111111110111111101111111 10111011111100.11111 1 1111111110111111111011110111111111011 

# 1 1 

# 11111111 1111 1 111011110101111111111111011011001 II 11111111111

TM irl r 1 I I

# 1111111•11



# II

" 

# Ii Northshore Mining Company Line 12 Hood Exhaust Stack 12/20/00 CO 2 Output 0 2 Output

17

8Northshore Mining Company Line 12 Hood Exhaust Stack 12/20/00



# 1111 1 01110001 0011000001000 001
Lunifillgollmumon . 6 

# loplim
Iiiimillmmoop 111111111 

# oomp II I 

# II 1111111 1 

# ompni0 i 111111111111101 111111ifinurntillfilidli 111 I I II 11 i d I.4 I, c It 

# pliffillillommunmummummuummummuponmilioulmumammi 

# pmp i piptimirmulomocummimumumommommommuoumum MAO Illibig L. 

# LW higill111111111111111111111111111111111111111111111111111111111111 

# uMmffiligiamomommumummummummmmummumumoommul 

# impi m limillimmimiumilliimililimmiiimiiiiiiiiiilimmi m 

# li "nomollowlimummumunoutummouffimummpolohnotw u 

# 1 0 

# 11 

# 1111 1 

# 11 1 1 

# 1 1 1011111 

# 1 1

1 

# 1 1 1 1 

# 11 I„ 

# 1 11 1111 1 11 11 

# I

iiii ii I 

# 1 1 

# I 1 

# 1
ii mil i fili in

### Northshore Mining Company Line 12 Hood Exhaust Stack 12/20/00 CO 2 Output 0 2 Output



## I I III 111111 t a Ii I iii Ii0111111111111111 M n min rum n um u rramemmen Num 

# ••••••••• . PON 

# ingrain MIIMMIN 

# FEN IMMO! MOM WPM MUNI 

# iiiiiril iiiiiiiiiirminiiiiiiiiiiiiillrillialiiriiiiiii 

# im mop ppomipmgmempannopmpullmompummulourn 

# 1 im Wilidd 1111111ndfiffiffiliMPINIPPIPINIONMUIVRTA$ 1111 WI PPM 111111NommffilinifiNIPIlifilhdlirldinliandirIMII 

# 10 ilihrnil 

# Buidniiiiimdmilmdimmummummommuimummoma p o perwrmumpunmmommmmummoommmmumm immni Immo unsumdmmuummmompumumoommummoom nummi iffillifilli IMIMMIIIIIIMINIMMIMMOMMIMMIMOMMIIIIIIMI 

# 11101 11 1 11111101111 11 111110011101111111011 1 110 1111110011111

1111101111111111111111110111 110111MMIMMIMI 

# II 

# 1 I MIIMMIMMI 

# iummommu n 

# 1 1 

# 111111111 0111111011111111111111111111111111111111111101111111•1111111 audinimmffill milimmhimmmillmullffinunis 

# mr . mumundaymoropllumuumumumpubsi likiiiiiiliiiiiiiil 

# TommullilifilliNIMINE11111111111111111101111111111111 b i lli11111110 11111101111111111111111 1 1111111111111111111110 I 

# iiiiiiiiiiiiiiiiiiiiiiiiiriiii moomplloplooloolommlommoglomplogoillin lophioholoolootiolommomoodkombilimpoi phimmilmmummillimmomillimmumulhohomm immollopdmiloommionsimompliimmomi 101110,11FIllomologoomommumohlommommum



# r ow miffill11111111111111111111111101111111110111111111111 

# ill 01110111111 1 111101, 1 11111111 .1 11111111111100111111001110 10111111001101011111 110010111 111111111 '2

### Northshore Mining Company Line 6 Hood Exhaust Stack 12/21/00 NOx Output

I Imummorm...cmum Imannimmossimm

mommummummommumummommilmummo mmummmumm mmmmmmmmmmmmmmNmmmmmmmmmmmmmmmmmmms mmsm 

# mmIIIIII

MENEMENNMEENNNIMENEMMUMEMINME MIEIMMEMEMMENE InimmommummoMMIMEMENNICAE NNEMENEMENOMENNEENNEENNEN ••NUESENNEM•NINNEN•WATEMEANUMENEMME MENEMINNIENNENNIN mu mmummommormirsummemmimemmumm ummommum EN_ . ; 

## 1g RHEMob/NNIWONSEMEMENNEEN mumnsms•...ammalummummomspommsim mommmumms MENNENSMENEMENNEMENEMMENNINSMA LIAMISMEMOSEENNMENN MONENMENSENNAMANEENESENNESEENSE MMENEA•MUNEMENNUME• mumsammiummummum•ummummumum ummummumum mummumnimmummummummommumumum mommuum EMENNMENNESSEE••N•MENNENSE•ME•N INEM•NNUMMENNE••ME NEEMSENNENNIERNMENNMENNUNSENNE N•S•NNE•NEENNMENNEN MAMENNMEMANNUMMNENNEMPECOMMISM EMENEMMENEAMMENESEN • ummemmmumwmaru.ax.emmi•mmewmomminu mmumum mummuumummmulmammemilmmasamewadammom mummumm mu mmommommil.mmE-mmummommomammmumm ummummil WEEENNNNEWASEINEENOWNE 4 MMMENNEM MEMO 

## S ENSAMMINNIUM4
NummUMUNEMENNENENNIMMWSMAMMINANN AMEMUMNSEENNENN MUNMENUMMEENNENEENNEEVENESNMENUMUNNESEMMUNIN 

## 1 -1
NUMUMENUMMESEEMEMMENNAUMMMENEMENN SEENENEENMENEEMM

• ENNEENSUMMENEMENNEMENCWENUMENUMM ENN•NNE•MENSEEM MSMMIMMUEIMMMMMMMMMNMNAN•MUNMMMME MMMMMMM•EMMEMMME ENESSE•MEN•EMEMENOEMMWEEMM•NSEMMO•M •MENNE•NNE•NNE MEMENNEMBIENEMEMUSIMMENNENNEEM•IEN EENNENEMENNEENN immumpre- WaRIANNEEMAMMENEEMMENNEMMENNEENNENNE 

## ra11111111111111111 1116111111111111111111111 EMMUMMENNENNEMMEMMEMENNEMENEMMENN IMMEMENMEMMENNMN MINNINEMEMINEMENNEMINENNMENNEMMM ENNEMMENNE•N•E•N• NAMMENNMEMEMMINENNEMEMENMEMEMEMMEN NEMENI M EMUMENNE MIENIMMENNIMMENNEEME•ENNEM•ENNESEM ENEMENEENEUNMENE MANNEMENNENNEMENNEMMEMENNEMENEMEN NENNMENNEEMENEEN MAMMIMMENISMNIMMAMMMENNEEMMENNEMMEN EMENEEMENNEMINN MINNEMMENNOMINNEMEMENNEMINNENSIMM IEMMEMIIMMEENNAM mummemmummummummummommummummu mmumm mmumm.rommiummassimorniummormummo mmummo rinuommumma.Emiumwemmicraolummwmommoriu mmommi. NEMINSMNNuMENNENSEEMANEMS 6 

## WASIAN AMINAMENEEMENNEEN
NEENNUMENNMENEMMEEMMINNEMENNENM ENEMENNEMEMENENNME MMEMINNUMMEMINUNEMEI N NEMMENNENNE E M MINENNEMEMENE MMEMENNMENNMENN MSE ENNE INEMMUNEMMENEMEEMMEIMEI M 

## 11111111111111111116111 11111111111111111111111111 EMEMENNENNEENNMANNUMMENNMENISMINNIM INEENNEMENNEEN 

## 1 NUMENNMEENIENNEINUMENSENSENNEMEMENNUMMEMMENNEEMEN 

## t EMENSMENNEMINEEMINENNEEMMESSMINEMENNEENNEEMENNME 

## I NUMMENMENNIESEINMEMMEENENNEMENIMMEMENNEENNEEMENNE 

## I I EMMEENNENNEMMESSMENINEENNMENNEMEM MEMEENEEMENNEEMS NEENNIMMENSINNWEINN SEENREMENIMMINNMENNUMMENEEMEN MENEEmMENNIMINEMMEN MMENEMENN MENEMENNEMENEMMENNE EMEMMEMENEMMMINEMINNNIENNESEN MUNNEMEMEMENNEMMENE 

### i I MMIUMNOWINMEINE MEMENEMENNEEMENEMENEMENNEMENNME EMENNEUMENNEMEgEN MENSENmENNUMESMEMMENNEMEMENEENN NIUMMINUMMI mourommommormarnmmummumm immommilmum imm. mmismommossmiummummomml 

# I EMEMMENNENMENE AMEN MUNN NOMMEMEENNUMENIMMENNENNE 

# 11111111111111 3111•1111.2111:111111111:111111 1131 ....N......mummml. lumm l mmommumm............ • 

# Iim ................... miumm.......m....1......



# nim .. mm mummin ysim
... §

..... 

# 1 u .....1............ .
mummumu m mmumomm immimmilm immmummumomm MINNEENNENEMENUMMME MEM SENN MENNEMENNEMMMENNEN 

# I NNIIMMENMEENTEMIMENS NMI ISEMINENIMENNUMMME 

## J I M 

## 111119111 IP II:1 " V O M : IIIIIIIIIIIN 

# ilim m mum 

# Immi .IN • maim mm Aulim ulmommmum ms. mom milm • . mu 

# 1.• mum • mom mm.....o. •


# 1 

# 1 1 111 11 1 1 11111411 1 Ill Mill II I III alit III mom 1 mu milmom • 

# J I WWII* my MI PONTA ilmilimmilp 

# I Iilli 01111.11141141•Awl Oil 141111:111111.1. , 11111 11111111111119.1 1:11 milimpur Immo • • 104 Al. IT' &gild II I IIII. 1 .., 

# iIIIIIIIIIWIALLI mmillm 

# ' 

# Mill! me .11 • 11..allue. • lim Mrimillimmimmis r„ Timm

IIIIIIAIMIIIIIIIIME

• Mei 

### 11111 MM



### 1.1111111 m. a ISMEMEM - benUMEMMER • Im

N 

## A

ummularom miiiri N mump EMIN ramm mummorimmum IUNQIIYEM NINE NEM NE UNES ENEMIX MUM MIgM194112,111111111111111111 IIIIIIIMMUMEMI II 

## WEND WEE S M V UM EMBE • MMUMMUMMUMINUMME 

### IllyvvoluvoThEIMEMS vIll BEIM .1•111M•••••••• MI NIMMMUSEMMOMME IN 

# Ir P NII•1••••••••••• 

# allimeraillIn g li NPR 6011111:1111:

NEME MENEM= INMAN M MENEMENNE U NUNN MENNEN= NMEMENESEMENNEWENENEMUMEMMAINNIMMENNENEMESSONS I NMESENEEMMENNIMMEMENNEMMENEEMmImmIr M U M F MENEME S MAN MMANNEEINMEMENNEEMENNEEMENNEMINEENIEA MINNEW N SIMI NNEEMMENNMENNEMEMMEMMENMENNEEMENEMINEM INEMEENSIMO 

## 1111111111112111411111 1111 •4 111. 11 111. 111111111 M 2UMMENNEENNUNIMN EMEMENNEMENMELEMMEN IMONNEMMUMMENEMMENIMINFNMESEEMENNENN ENNENNUNIMMEN IMEMMUMMEIWIMEESIAVOL/M INIMMENNEMOMNEMENNEN IMINNNENN WO SWIMS MN MENIMMEMENNINI MEM= , 1MMEEMEMENEMNEMNEMINNM•MINESIMENNANNMENUMMEEMMEN -a mmilimmommumummummummemmumnimmumummumm 1 a...aamminimmommummummin.mumummumumma . ammummummummummomummummummommummo mmi mommommulummumm.mmummummummuummum mum mummummumnsmmummumummummimmimmummu m mummomms.mummmlimmum.mmunummummum umm multimumummumm-mplimommummommumm omm .m.milmommtimummom mum IMIIMMINVEMENELMOMME 1 MI WSW WSW V maim IMMUMMENEMEMMEMS • 

## • -

1
7 '
7

- 1

- 1

.. -- 1

- •



### 1Northshore Mining Company Line 6 Hood Exhaust Stack 12/21/00 NOx Output

mmmmmmmmmom•mmmmnmrmimmmmmmsmmmmmmmms ommommummummummummemzmummummiummum• •••••••••=m•mmmmmumummmmsmmnmmmnmmmmn•s MEMEMEMMEEMMEMEMMIMMUMMEMMINNMEMMEMEMUMUMEMEMMUMM • m•mmrmmmmamummmmnummmmnnmunmmimm mm•mmmmmummmmmmmmmmmummmmmmm•munnnm MEMEMMIMMUMMIMMMUMMAMMUMMIMMOMMMOMMUMMEMMIMMIMMEMEMEM MMOMMUMMUMMEMOMMEOMMENMEMMEMMEMMUMMEMMEMMMEMEMMMEMM MERMEMEMMEMMEMEMMEMEEMMEMEMEMENMEMMEMEMEMMEMMIUMMEM MIMMIMMUMMEMEMUMEMAMMUMMMMUMUMMUMMUMMEMMOMMIMMEMMMEM W EMMEMMUMRAMMEMPUMMEMMMMEMMMEMMEMEMMUMMIDIMMEMMEMKU mmmommmimuMMURMUMEMMEMEMMEMMEMEMEMUMMMUMMMImmmU MEMEMMEMMummEMMUMMUmmimmmumumMUMENMEmmmmammmilimmumm mmmmmmmmmmmmmmmmmsmmmmmginmmmnmmmgmmmmmmmmmmmn immummummummummmummmummonommummommin immommilmmminmaimmummummmummmimmummummum mommommommummummummiummummummumminsm mummilmommommemmommimmommommommummummi n MMEIMMMEMMEMMOMMIMUMMEMEMMEMMEMMMEMMIUMMOMMEMMMIMMEM.
• E••••MU••U•MM•MEMMUUMMEMMOMMEEMMEMMMUMMMOMMEMMOMMEMM MEMEMMEMMEMMIEWMMEMMEMEMMMIMMIMMIMMEMMEMEMMINMEMM. mmummmoMmumMMEMAMMEMMEMMEMMEMMIMMMEMMIEMMEMMUMUMMErn IMMUMIMMEMOMMEMMUIMEMMEMMEMEMMEMMUMMMOMMEMEMMEMMEEMM MMMEMMOMMEMMMUMMUMMIMMUMMMEMMEMEMMMMMEMMMEMEMEMMMEM MEMMEMMMENEMMEMMMMEMIMMEMNIMMUNMEMENKMEMMMEMEMMEMM MIMMEMMEMMEMOMMUIAMMEMMEMEMMMEMMEMMMIMMMEMEMMIMMEMMM MNIUMUMMIMMIMUMMIUMMEMMEMMEMMUMMUMMINEMMUMMUMMEMMEMMM MMMOUNMEMEMEMMEMAMUMMEMUMMEMMUMMMEMMEMMUMMMUMMEMMUM MIMMOMMEMMEMMMOMMMIMMIMMEMMEMMEMEMMUMMEMMEMMMUMMMEM immommummommiammommummminimmiummummumn WEMMEMEMMUMMENIMMMEEMMIMMEMMMOMMEMEMMUmvMMAMMEMMIU minimmMEMMMEMMMUMMOMMUMMOMMEMMEMMEMMEMUMEMMUMEMMEMM mitimmennommommummummummuummummummor mmmmmmmnmmmmmmnmmmmmmmmmmmmmmmmmmmmW • mmnunmmmmmomfmmmmmmmmmmmnmmmomnnmrm•••" MEMMEMMMOMMEMMEMIIMMEMMUMMIMEMEMIEMMEMMEMMEMMMEMEMM MMOMMEMMMUMMUMMUMMUMMMEMMMEMMUMIMMMAMMUMMUMMEMIUMI EMMEMMEMMEMEMMEMNUMMEMMEMEMMMENMEMMIMMMUMMEMMMUMEM mummummummummommummummummummummums MEM mMEMMEMMIUMEMMEMMEMUMMEMMUMEMMEMMEMMEMMIMMEMEMEMIS mmommumnsmnimmiummummummummommuummo , mumemmummummtmommummummummummommummor M M E MEMEMMMUMMEMMUMMOMMMUMEMMUMUMMEMMEMMUMUMMMMEMMM IMMIMMMEMEMMEMMEMOMMMEMMMEMMMEMMMMEMMMMEMMEMMOMMMMM IMMU MMEMMOMMIMMUMMUMMMEMMEMMMEMEMMEMMEMMEMEMMUMMEMMI. mmomminummummummmummummimmummommummin MMEMMUMMUMMEMMEMUMMEMUMMUMEMMEMMUMMIUMMOMMOIMMUMMUM MEMEMMMUUMMEMEMLUMUMMENEMMUMMEmMEMEMMEMMENEMMMEMMM MEM EMMIMMUMMUMEMFMMEMMUMMEMMEMMMEMMUMMEMMEMOMMEMMUI. MMEMMEMMUMMMUMM.MMEMMMUMEMMUMMEMMEMMMEMMEMMMEMMUM AMEMMEMMMYMMIMMMUMMMEMMEMOMMEMIMMISIMMEVMMENMEMMIC EMEMMMEMMUMMMUMNEMEMMIUMMUMMEmmEMMEMIMMEMMUMMEMEMM MMEMMMEMEMMMUMOREMMEMMUMEMMEMEMEMMEMEMMMEMMUMMEMMU ••• •••••EMMUMMUMMEMMUMMEMMEMMEMMEM••••••••M•••••• MM E MMEMMEMEMMMUMMEMEMMOMMEMEMMIMMEMMOMMEMMEMMMUMME EMM MUMEMMEMMMEMMMUMMEMMEMUMMIMMOMMIMMIMMUMMEMMMEN M E MMUMOMMMEMEMMMWMUMMEMMEMIIMMMEMUMMEMMUMMUMMIMMEMMOMM m•ommmomommummnmlmmmmmmmmmmmmmummmmmmo EME MMWOMEMMEMMEHMEMNIMMEMMEMIUMMUMMIMMOMMUMMEMEM EMMIMMMEMMEMMMENMMEMMEMMEMEMEMMAMEMEMOMMEMMMEMMEMM MMEMMEMMIUMMUMUMUMMEMMOMMEMMEMMMEMMOMMMEMMEMMEMMEM mosommmummummunammommumummonommEmmummEm Eummumummismoimmomm •••mu••••••• 

### •••• mummommummorimmilamommmilmommommummon MMEMMEMMEMMUMMUMMEMMMUMMUMEMMMEMMMIEMMEMEMMEMMME mummommummirmymmumummomammummwommumm mmimmummunglmommimmummummummummimmommumm ilm•immummimmcommi Immommummummommunimmum

m u mommimmimmuum nummorrommimmommiumm ammummgmmunrms 

### mmilmw aLomemEmmotgiumm MINN 

### M mi lmOMPRR_PR o mmlImIMMOMmommwdma MumMIAmmMAMMumUMMM MEM IMUMMUMMEMPOMMIITiMMENEMMWMEMMONMEIMMEMEUMEM IMMEMEMEEMEENEME 

### NVW EMMEMNEEEMEMEEMEMENEEMEMMEEM IMEMENEEMEMEMEME 

### • I MNIMEMMMUMMEMEMIMMENEMMEMMUM MEME•EM•••••M•••EMMM•MM•NNMMEU•••MNMMMMMEMMMMMUMMI MMEMMEEMEM MMMUMMUMMEMMEmmUMEMMEMEMMUMEMMEMEMMEM MEMMEMMUME EMEEMENEMIIMIIMEMMEMMEMMEMMEMEMEMENIUME OMMMEMEMMIMMMEMMENEI 

# 1 mmmmemm•mwummmmmm ri i

m_ 

### Emomm..m.y. mpromisommummomm iimiimitiftliMolg g.pailii 4MEMMEMMIMMUMMEMM MMMUMMOMEMMEMMEMMEMOMMMAUF=RMMal IMMIMMEMMEMEMMUMME mmisminummingsmommium ammo MUMMEMMEMMMUMMEM Eaarimmirawswii - --- REEWOMMIMMIIIMME IMMEMMEMMEMMMUMM MMME E M MENEWMIMMEMMUMEMMEMMIMMEMMEMMEMMEMMMUMMOMMIMMM MMU 

### MW II MMMIREMEMEMMIMMOMMEMMMONMEMMEMMMEMMEMMEMMMEMM MENIM MEIMMUMMUMMEMMEMEMIMMEMEMMUMMMEMMEMMIMUMMMUMMM



### i mammummimmoMMOMMUMMONNEMMENF MOMMMWMIRRIMEMEMOMMM milliolummumprimmismr 'AmlowayAwtsommommumm mummummumummois mom m imomandowi Simmommum raummommummuram 

### vim • ormommilMsrmiummulin Wmumummommmurmais mum •mmmmmmmmumummmm MEMU MMEMMMEMMEMEMMEMMMUMMEMMEMMMUMMERMIMUMMEMMMEN EMEMM IMMEMEMEMMECEMMEMMMEMMEMMEMMUMMEMMOMMIMMEMMME
• EM•••• MUMMUMM•M•M•M•IM•E••IMMO••MMO••EMMUMMEMEMEMM MMO MMEMMUMMIMMUMUMMEMMEMMMEMMEMMMEMEMMEMMOMMMUMEMM MEM MEMMIMOMMIUMMUMMOIMMEMMEMMEMMUMMMMEMMEMMMEMMMUMEM MMM UMMIMMUMMMEMMUMMEMMEMMEMEMEMMEMMEMMUMMEMMEMMEMEM mumnmmmm•mmmam•mmmmmmmmmmmsmmmnimmmmnmm MMMU MMMEMMUMMMEMILMMEMMMIUMMUMMUMEMMEMMEMMMMEMMUUMME mmmwom•mmmrmmnmmmnmmmmmmmmmmmmmmm moM MEMMEMEMMMUMMIMEMMEMMEMMMUMMMEMMEMMEMMEMMBEMMEMM MENUM MOMMMUMMUMMMEMMEMEMEMMEMMEMMMEMEMMEMOMMMUMEM mmmmmmymmmmmmmmnmnmmmmygmmmmmmmmnmwnmmmmmmn mmummammommrammimm.mmitummummommummum mmumminimmomplimminemmommummmummumminimm
• inimmu•u•m•m••m••mm•••immimmummumm ME• M•M••M•UMWMON•MMOMMU•MM•MMEM•UMMMM••••MMIMMUMME MEMMI MMEMMEMEMMUMMEMEMMEMMEMMMEMMMEMMWMEMMEMMMEMEM MMUI MMIMMMIMMUMMOMMEMUMMIMMEMMUMEMMUMUMMUMMMEMEMEMME MUM MEMMEMOOMMUMMEMNIMMEMMIUMEREMMMEMMEMMUMMUMMMW MIUM MEMMMUMOMMMEMMMEMMOMUMEMMEMMEMMMEMMEMMMMEMENMEM EMMUMMEM MUMMIMMEMMEMMIMMEMMUMMEMUMMEMMIMMIMMUMMEMM MM M I UM M EMEMEMMUMMIMMMEMMEMEMMUMUMMEMEMOMMUMUMMUMM IIMmim MINMEMEEMMIMMINUMEMMMINEMMUMOMMEMENEMMEEMMEM MMEMEMEM MUMMEMEWMUMMMRMEMMOMMIMMUMMEMMOMMMEMMIMM MEMM IMMEMMEMMIMmUmidiliflIMMOMMOMMEMUMMEMEMOMMMEMIMMM MMIM MEMMMIMMMEMMIMMIU m &MMMOMMWOMMMEMUMMEMMIMMEM 

### •• E _aagERM31162ManDmILOSAMMIIMMEMMINI MEM MEMMIMUmwmm4MATAIMMIMMIIMMOIMMIMWMPSIMMEMEMMMEMENU •..u.MMIMMENEM MU M MILAMMII 

### rmr MMOMUMMEMEMMUM 0Northshore Mining Company Line 6 Hood Exhaust Stack 12/21/00 NOx Output

FEEMENMEMMUMMEMMEMENVEMMOIMMENOMMEMMOMMOMEMMMEME. MIIIIMMEMEMEMEMEMEMMEL2MMEMIUMMILIMMUMIMMEMEMMEEMMEMAN 1

. 1 1MMENNEEMEMEMMEMEMINEMEMEMEMIMEMEMIUMMEMEMEMMEMEM MEMMEMMEMMINIMINIMMEMMEMMEMMUMEMMEMMEMEMEMMEMMENNEM IIMMEMEMEMMIMMEMEMMEMEMMIMAMMEMINMOMEMMEMEMMINEMME MEMEMMEMMEMMEIMMEMMEMMERUMEMMOMMIMESEMMEMEMIMMIMM OMMEMMMIIMMENMEMMEMMMXIMMEMMEMMEMMWMWSEMMMEMINIUMM MIONIMMEMEMENNEMINIMMINEMEMMIUMMEMEMUMMINNEMEMMININ mmmmmEammmnnmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm MMEAMEMMIMWMEMEMEMMEMMEMMOIMMEMEMMIMINIMMEEMMEMOMME MENEMMEMMEMEMMEMMEMMEIMMEMMEMMEMEM mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm •••mu•mo•mo•m•mmmommmsnmammommommommemmommommomm UMMEMENNEMEMEMMEMMEMINWIEWMAMMEMEMIMMEMMEMMEMME MUMMEMMEMEMMINIMMMMEMMMEMMEMMEMMEMEMEMMEMMMUMEMOMME ENEEMEMEMEMOMMEMMMEMENNEMENOWNERAMMINUMNIUMMEMEMM MEMMEMEMMEMMEMMEMMEMMEMMWENCWAMMEMMEMEMMMEMEMEMM MMMIIMMMEMEMEMMINIMMEMMEMEMMEMOMMEMMEMEMEMEMMEMMIMEM MMEEMMENUMMEMMEMENIIMMMEMEMAWANMEMPAMMEMMEMENIMMIMM mummummummmmummmmommummmaamsmmemmmommummmumm MMEMMIMMEMMEMMEMAMIUMEMMEMMEMMOMMEMMEMEMMOMMEMMEMOR AMMINIEMMEMAMMINIMAMMEENNEEMINIMEMEIMMEMEMEMEMMIIMMAN IIMIMMEMMENNIMEMMEOMMEMMEMMEMIUMMEMMMEMEMMIIMMEMMEMME EMEMEMEMMEMMINIMEMMEMMEMEMMEMEMEMEMEMEMBEMEMSEMINIMM INNIMMEMMEMEMEMWOMMEMMEMMEMMEMMMEMMONNUMEMMEMEMENN NEEMMIIMMUMMEMMENAMEMEMMEMEMEMMUMNIMMEMEMMEMMEMEM MEMMEMEMMEMMEMMEMMEMOMMEMOMMIIMMEMMEMMEMMEMEMEMEMM MEMMEMEMMMEEMMEMUMMEMMUMMMEMEMMEMMEMMENNEMMUMMEMEN MEMEMI•M••EMEME•IIMEMEMMEMEMEMMENIMMEMIUMINIMIMMEMMEM MMEMMEMMEMMEMEMMUMMEMEMMEMEMEMMEMMEMENIMMEMEMEMMEN ••E•M•NNEM•E••EMMEM•MMEMEMEM•MIUMMEMMMEMEMINIMMEMEM MMUMMEMMOMMOMMISIMMEMMENERMIONMEMMEMEMMIUMMIMEN MMIMMEMEMMEMEMMEMEMEMEMEMMEMEMMEMEMINIMMMEMEMMMEEMM MENEMEMENNIUMMERIMMEMEMEMMEMMEMEMMENUMEMEMEMMEMME •••EM•••IM•EMEMMAMMEMMENUMMEMIMMEMEMMEMMENNEMEMOIMM OMMIMMEMEMEMEMMIIMMEMMEMEMIMMEMMINIMMENNIOMMUMMINIIMME IMMOMMEMEMMIUMMEMMMEMMEMEMEMMEMEMMENNUMMENMEMMEME IIMUMMEMMEMOMMURIMINIMMEMMEMUMMEMMOMMOMMEMMIMEMMOMM NEUMMEMEMMEMMENKIMMIIMMUMMEMMOMMIIMMOMMIMMEMEMMEMM MIUMMEMMEMIIMEMEMEMIUMMEMEMMEMEMMMEMMEMERMEMMENUMM IMMENUMMOMMIIMMEMMEMMEMEMEMEMOOMMEMMEMMOOMMEMMEMM REMEMMUMVAMMEMEHMEMMIIMMEMIMMMINIMEMEMEMMEEMMEMME MINIMMEMMEMMEMMISIMMEMIRMEMMUMMEMMUMMEMMOMMEMEMEME

• MEMEMENNEMINIMMEMMEMIUMMEMENIUMMUMEMEMMEMEMEMMMEN MEMMEMMEMMEMMEMMUMMEMEMEMEMMEMMEMMEMOMMEMINIMMIMME MEMMEMMINMEMMEMEMEMMUMMEMMIUMMENUMMEMMEMEMMEMMIMEN IIIMMEMENNUMMEMMUMMINEMMEMMMIUMMEMEMENIMMIMMMOMMEN MMEMMEMEMMOMMEMEHMEMEMMEMEMINIMEMBEIMMEMMEMEMMINIM
• m•mmmmmmm•mmmmmm••mm••mmmmmmmmmmmmmmmmmmmmmmmmmmm MEMMEMMEMMENIMMEHMEMEMMIMMENNIMMEMMEMMUMMEMMEMEM MMEMINIMMEMMEMEMEMOMMEMEMEMMOMMEMMUMMEMMEMMEMMINE ••MINIMEMMMEM••WMEMEM•E•M•MMEMEMIMMEMEMEMMEMENN MEMBEMMEMMEMMEMMVOMMEMMEMEMEMEMIIMMEMMEMMIIMMUMMEM

mommommmmommommeemmommommmommummommommmmmommmmm

• 1111 M••MEMEM••MMEAME•M••M•MMM•MMMOMEMMEMMEMEMENNEM MMEMM••EMMEMI•MMINEEMMEMEMENUMMEMOMMEMEMMEMEMMEMEN MEMMEMMEMEMMEMINIMMOMMENIMEMEMMIMMEMEMEMEMMEMMUMME MMINIIMMEMMENUMEMMEMMEMMEMMOMMEMMIMMEMMEMMEMMENUM

• 11 ••M•MMINI•IMMM•MEMMINIMMEMMIM•E••MM••EMUMEMMMMEMM MMEMEMMEMPUMMUMMOMMOUMEMEMMEWOMMEMMEEMPUMEMMUMUR UMENNIIMEMERMEMEMINELZEMEMEMENLAIMEMMIMMIC2MMEMEMMAC MEMMEMEMEMEMMEMMIMMEMMEMMEMERMEMMERNEMMIMMUMMEMM IONIMINEMEMENEMMOMMNIMEMEMMEMMIMMEMMIUMENUMEMMENNEM MEMEMMEMEMMEMMIIMMEMMEMMEMMEMMEMEMUMEMIMMEMEMEMMEMM MEMMEMENNEMMENIMMEMMEMMEMMIMMIIMMEMMINEMENNEMMEMMEM MMEMMEMEMEMMMMEMMEMEMMOMMENIMMEMMEMEMMEMMEMEMMEM MEMEMMIUMMOMMUMMINEMMENNIMMEMMEMMEMOMMIMMINMEMMINI UNIUMMEMMUMMIMMERIMMEMNIMMEMEMMEMOMMEMOMENNEMMENME IMMEMMIIMMEMENNMEMENIMMEMEMMEMEMMEMOMMEMEMEMMINIMMEM MEIMMEMMIIMMEMEWMIMEMMEMMEMMEMMEMEMMEREMMENNEEMM
• ME•MINIMMEMENNEMO•EM•E•M••EMMU••EMMEMMEMEMMEMMINEM MEMENIIMMEMMENNEWAMMETT UNI MENUMMENUMMEMIMMEMMEMEMM MENEEMINIMMMMEMMOMMEM EX MIMMMMIMMEXIMMIIMMEMIR IIMEMMUMMEMMEMEMINNEME ME•MUMMEMMOMMINIMMENSINIMMEMEM MEMEMMEMEMMEEMMEMMENMEM I MUMMEMINEMEMMEMEMMEMMUMMM III MMMENNMEIMMIMMUMEMEMEMEMMUM IIMMMINIMMEMINNEMMEMEM MMEMMEMEMEMINMIMUMMIUMEMEMEMEM MMEMEMMENERMEMMMEMEM
• MINIMMEMEMMEMMI•MENEM•UM•••NIONEMM••••MEEMMINIMM MMINIMMENNIMMEMERMEMMENUMMEMMINUMMIMMEMEMMMUMMEM IMIUMMEMINIMMEMMUMEMEMMUMMEMMIMMEMMEMEMEMEMMEMMEMEN
• MIMMUM•INI•MENHOM•EINE••••••MMIN•MMOM•MMINIMMOMMN
• INMIMMM•IMMMINEWMINU•MEMIM•EMEMMITOMMEMMEMEMMEM MEMEMMEMEMM EM EMMITEMMUMINEEMEMENNE MMOMMEMMINIMMEM IMINUMEMMEMEMEMIMMEMMEMMEMEMENIUMIN IIMOMMEMMIIMMENE IIMMUMIMMEMMEMEWIMUMMIXEMMNIMMEMMEMMEMMIUMENEMEM MEMENUMMEMEMMIIMMOIMINEWOMIREMMUMMEMEMMEMMEMENEMMEMEM mmummommommummmummma*Mmmommamammummumummummmom mmmmmmmmmmmmmmmmmmmr:m:mmmmmmmmmmmmmmmmmmmmmmmmmmm mmummummmommummmmiAmommmomniumumummummummmmumm mmmmmmmmmmmmmmmmmmm m IIMMEMEMMUMPINIMMIMMENNEMMENE MMEMMUMMEMMENIMMEMMEMEMEMMIMIMMIMOMMEMMEMMEMMEMME MEMEMEMEMEMMEMMIMMEMMIEMMUMMEMMEMMEEMMEMMMEMEMME OMMEMMEMMEMEMMEMINNEMINKEMMIMMICIMMENOMMEEMMEMEMM IRME••MMEM•MM•M•MI•ME••M••M••NME•MM•MEMMEMMEMMEMM

NIMMEMINIMMIMINE INI MEMMMMEMMEMMENNUMEMMINIMMEEMMIIMM M ft nmm•mmmm••mmmmmmm•••m••m•mmmm mmommommmommommommommilmommrmsmgmmumnimmmommommmmom MEMMNIIMMEMMMEMEMINIMMINECCOMMAMEMMZEMMAMEMEMEMMUMM mmmmummommommmummmommummmommomminmaummommommmum maw mmommommummummummommmummum mmommmummlammmummumgmmommmommummommommommommommmim mmmnmmmmmEmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm WOMM•EMMINIMIMMEMMEMEMMEMMEMEMMOMMEMMEMEMEMUMMEMM UM MMMEMMEMMEMME•M••EMM••MEM•EINIMEMEME OMMEMMENIUMEMENNENNOMMEMIMMEMMEMMEMMEMOMEMNIMMMEME MMIIMMEMMIMMEMMENMEPANICIAMMEMMEMMENaMMOMMEMMEMMUMM MMEMEMMEMMEMMEMEHMEMMUNIMMUMMAMWEAMIMMIMMEMMEMEMM mmommummommummummmammummamimmmommummummommm MMEMEMEMMEMMEMMEMMIMMEMMINIMMIAMEMMEMEMMEMEMMEMMEMEM MEMMIMMINCHIMMENNAMMEMMEMMEMEMMMEMOMMUMEMEMMIUMEM mummommommommmmmmummmommmmummAmmmammummmommummm MUMNIMME•MONEM•NSEMMIU•MIMIM•INSE••INEMMEMEMBEMMEN MEMMEMMIIMMINEMMEMINIMEMMEMMEMENOMMEMMEMEMEMMIUMMEMM
• MU•M•MEMM••MEMMIM•EM•EMM••MM•MM•MMEMMEMEMMENSEMME

• 11 M•E•EMEM••MM••ME••MUMM•MMEEM•E•MBEENMEMEMIIMMEMM
• EM•MMI••EME•AMIIM•EMMMEMEM•EMM•••EMMEMEMEMENIME •••MMEMEM•IUM•EMMEMM••E•M•M•MEM•ME••EMEMMIUMMEMM MME•MEMMEM••MMAMME•M•MMEMMEME•MIMMEMINIMMEMEMMEN 

### _

! ■



### -



### .1

I. I

1 1 .7,
1 1 -1

### Northshore Mining Company Line 6 Hood Exhaust Stack 12/21/00 CO 2 Output 0 2 Output



# . _ 

# I I I. 11 11 I 11II 111111 1 11 11111 1011111110 111 111

iiniffir i 

# IIiIIIIIHIIIIIIIIIHhIIIIIlIIIIIIIOIHO1IIIIIIIIIIIIIIIIII 

# I I 1 1111111 1 

# I 'l 

# l III

;



## II I 

# 1101110 011111011111111 11111101 

# 111111111111111111111111001111111111011111111111101101111111 iniumumagn monummi lmor ygElm o 

# umm 111000111 

# 111 1 111111111101101 1 1111111111111111111111111111111010111111111111111101 11111111111111111110111111111111111111111111111111111101111111
llingELlimpuisumummitionwhomommommorollollul 

# HoPopot01 1 111111111011111011111101111101N1111101111111

1111111111111111111111111111111 1110111011 1111

ji 01 

# sot l i e " e " "11 ■ P is

### Northshore Mining Company Line 6 Hood Exhaust Stack 12/21/00 

# II MI 11111 11111 

# 11111111 hIll 1111111111 

# 1 

# I 

# III 1111 11111111111 1 0 I I 11111 I II 111 •fiji 

# NEUF 111111 111 1 Ohl 11 

# 1111111 1111111111

uhIlIllIlli III 11111111 I u mm 'Noma m counIUMENIMII



# 0 1111



# 111111 11 , I 11 111 qr I 

# I iii ollu 11111 1111111 III 

# ummummimmo ohm m NI 1 11 11111 NU Ili IMO 111111111111111111111111111111MIMINIMMI 

# mun mmim um im m ou r ommummint r 

# p m m uum m m mu mull mum ull mumummuum 

# 7 .gjo
ounqm m 11 n 11111 fill IM 111111111111111 111111 

# INhlI 

# I fl 

# I flIflhIIiuhIIIHiIIflhIIIIllHIIIlIilIi 111111 11111 

# 11 111 11 11I11 

# ' lIlllllllll IlllllllllllllllhlI 11l1I11IIlI I lIlI IIIIIIIIIIIII 

# I

IIIIII I I I III 111 I 

# Ill lin I 111 111 11 I I

1 

# 111 1 1 1 1 1 1 1 111 11 I 

# II 011111111111101 I 

# 11 1 1111 11 1111111 

# 1 111 .imi ni I I I NMI:win 1 1 Il101hhhIhI l .7 111111 I I 

# 081 111111011.liii 111111 11 1 

# 11111 I 1 I II I 111 

# 11 1 11111111111111 

# 1111 ii E1 

# 11 hI0 

# IIII 1111

uiuiii 

# II I 11 1 

# 11 JUIN 1 1 11 

# RIO I 1 I 1111 

# d 

# iiiiiiiiMiiiiiiiifli

1.110111111.1 1111 

# 8111 

# 11 9 1I 

# IIII 11111mrsilliF lit um r

NW 1 

# 11 1 1 riliffilli r

I 1 FM= m bui NM 111 1111111111d11111 

# ourrommu NM I _111111 III I Man I NI INN 11111111 •

# Illiiiiiiii111011111110111111111111111111111iiiii0 111111 N 

# EINEIHE 

# 1 pummummumpr 11110111 

# olomm 101 I 101110 

# im Milli 1 1 1

1 I I I I l

I I

1 1 1

110111i01:111PPIE 11111111111111111111111 1 1 immumiumummuni nurrommoommllogomm mums allbu num A m ingloullullmilll 

# 111101111111111111111111 1111011111 1 111 11111111111111 1 1 1101111 1 111 111,11111 Ma_ 11 1 01 11 1 111111 1 111E11 1 1 11 1 1 1

1 1

1111 1 11111111111111111111111 • 11 1 111 0 1111 

# 111111111111111100110 1 11110101011101 10111111111111111111111 1

1111 1111111111 1 11 1

1 1 1111111111111 1 11 1111 ill 1 I 111111 11 

# 011100111 In mingilmlimmuummumumminumill Lei 1111111111111011111111011110011111111 

# mu ummumm 

# i i' 

# MIMI I II

1 II

1 1

1 1

1 

# II

1 I

1 

# II MB 1 1' 111 ' 1 I 

# IIIIIII

Null I 1111111111111 

# I I I 1 I

1111111111 11111111 1



# I I 111 1011 1 III 1111 1 I 1 III 11111 III 1 II II .. 

# I 1 1 I II 1

I I I 1 1 

# 1 I I 

# ii i 1 1 1 

# 1 

# 111110111111111111111111111111111111111111011111111011111 111111111100 1 111011111101111101111 c Q 5



# nummummouputunnummllommuniumummommummun 010011111111101111111001, 11111111111111111111111111111110111111111111111111,00111011111111101

INN MI 1 I 

# mu mmi 111111111111111111!11111p011 111011110 llhiiillhhhhhihII Northshore Mining Company Line 6 Hood Exhaust Stack 12/21/00 CO 2 Output 02 

### Output

### CO 2 Output 0 2 Output 

# J 

# r Ii 

# P,14,11111.11111 II I 

# I I i d 1101 11 0i 

# liii tooquinnountillii11311011111111111111111111111111111111111111111111111111111111111 

# 1010001 1 111111 1 11101 1 11 ii 

# 101011 

# 111 1 1 1 011

" 11111111 

# I Northshore Mining Company Line 6 Hood Exhaust Stack 12/21/00

)0Northshore Mining Furnace 12 Waste Gas Stack 1205 Barr Engineering Reference Method Data Logger Output North Shore Mining Silver Bay, Minnesota The time is 07:29:13.53. The date is 12-20-2000. Time NOx 02 CO2 Time ppm % % 07:29:34 0.1 -20.6 -0.1 07:29:54 0.0 -20.6 -0.1 07:30:14 0.7 -5.2 0.0 07:30:34 0.7 20.6 0.1 07:30:54 0.7 20.6 0.1 07:31:13 0.8 20.6 0.1 07:31:34 0.7 20.6 0.1 07:31:54 1.1 20.6 0.1 07:32:14 1.6 20.6 0.1 07:32:34 1.7 20.6 0.1 07:32:54 1.6 20.6 0.1 07:33:14 1.7 20.6 0.1 07:33:33 1.7 20.6 0.1 07:33:54 1.7 20.6 0.1 07:34:14 1.6 20.6 0.1 07:34:34 1.6 20.6 0.1 07:34:54 1.8 20.6 0.1 07:35:14 1.3 7.5 0.0 07:35:34 1.6 1.3 0.0 07:35:53 1.3 14.2 0.0 07:36:14 1.5 0.7 0.0 07:36:34 1.4 0.1 0.0 07:36:54 1.4 0.1 0.0 07:37:14 1.4 0.0 0.0 07:37:34 1.5 0.0 0.0 07:37:53 1.4 0.0 0.0 07:38:14 1.5 0.0 0.0 07:38:34 1.5 0.0 0.0 07:38:54 1.7 1.7 0.9 07:39:14 1.6 16.4 3.0 07:39:34 1.6 17.4 3.0 07:39:54 1.7 17.8 3.0 07:40:13 1.8 17.9 3.0 07:40:34 1.7 17.9 3.0 07:40:54 1.6 17.9 3.0 07:41:14 1.6 16.8 5.3 07:41:34 1.4 10.4 9.8 07:41:54 1.4 10.0 9.8 07:42:14 1.3 10.0 9.8 07:42:33 1.4 10.0 9.8 07:42:54 1.5 9.9 9.8 07:43:14 1.4 9.9 9.8 07:43:34 1.4 9.9 9.8 07:43:54 1.2 9.9 9.8 07:44:14 1.2 9.9 9.8 07:44:34 1.3 9.9 9.8 07:44:53 1.2 9.9 9.8 07:45:14 1.2 9.9 10.0 07:45:34 1.2 10.0 10.1 Page 1 of 16Northshore Mining Furnace 12 Waste Gas Stack 1205 Reference Method Data Logger Output

Time ppm % % 07:29:34 0.1 -20.6 -0.1 07:45:54 44.6 9.9 9.7 07:46:14 221.0 3.1 0.1 07:46:34 283.9 0.1 0.0 07:46:53 289.5 0.1 0.0 07:47:14 446.9 0.0 0.0 07:47:34 448.1 0.0 0.0 07:47:54 447.4 0.0 0.0 07:48:14 651.2 0.5 0.0 07:48:34 446.4 1.1 0.0 07:48:54 448.0 0.7 0.0 07:49:13 447.4 0.0 0.0 07:49:34 51.3 0.1 0.0 07:49:54 231.6 0.1 0.0 07:50:14 234.1 0.0 0.0 07:50:34 235.8 0.0 0.0 07:50:54 236.6 0.0 0.0 07:51:14 237.1 0.0 0.0 07:51:33 237.5 0.0 0.0 07:51:54 168.5 0.0 0.0 07:52:14 4.5 13.0 0.1 07:52:34 2.5 20.4 0.1 07:52:54 2.1 20.6 0.1 07:53:14 60.2 16.7 0.1 07:53:34 6.4 3.9 0.0 07:53:53 1.8 0.5 0.0 07:54:14 1.2 0.2 0.0 07:54:34 0.9 0.1 0.0 07:54:54 0.6 0.1 0.0 07:55:14 0.6 0.1 0.0 07:55:34 0.6 0.1 0.0 07:55:53 0.3 0.0 0.0 07:56:14 1.0 4.2 1.5 07:56:34 0.7 16.8 3.0 07:56:54 0.6 17.6 3.0 07:57:14 0.6 17.6 3.0 07:57:34 0.3 17.7 3.0 07:57:54 0.6 17.8 3.0 07:58:13 0.3 17.8 3.0 07:58:34 0.3 17.8 3.0 07:58:54 1.0 15.8 6.5 07:59:14 0.9 10.4 9.8 07:59:34 0.9 10.1 9.9 07:59:54 0.7 10.0 10.0 08:00:14 0.8 10.0 10.0 08:00:33 309.3 9.2 7.8 08:00:54 436.5 2.3 1.0 08:01:14 443.8 0.3 0.1 08:01:34 445.1 0.2 0.1 08:01:54 445.9 0.1 0.0 08:02:14 446.3 0.1 0.0 08:02:34

. 252.5 0.1 0.0 08:02:53 238.4 0.1 0.0 08:03:14 238.1 0.1 0.0 Barr Engineering

Page 2 of 16Furnace 12 Waste Gas Stack 1205 Barr Engineering Reference Method Data Logger Output Northshore Mining

Time ppm % % 07:29:34 0.1 -20.6 -0.1 08:03:34 238.4 0.1 0.0 08:03:54 137.6 0.1 0.0 08:04:14 6.8 0.1 0.0 08:04:34 2.4 0.1 0.0 08:04:53 1.8 0.1 0.0 08:05:13 1.6 0.1 0.0 08:05:34 40.7 0.1 0.1 08:05:54 93.1 10.9 1.5 08:06:14 92.0 16.8 1.7 08:06:34 89.7 17.0 1.7 08:06:54 88.5 17.0 1.7 08:07:13 88.0 17.1 1.7 08:07:34 87.8 17.1 1.7 08:07:54 87.0 17.1 1.7 08:08:14 86.8 17.1 1.7 08:08:34 84.8 17.1 1.7 08:08:54 85.3 17.1 1.7 08:09:14 87.9 17.0 1.7 08:09:33 86.9 17.0 1.7 08:09:54 87.2 17.0 1.7 08:10:14 88.0 16.9 1.7 08:10:34 86.2 16.9 1.7 08:10:54 89.2 17.0 1.7 08:11:14 88.7 16.9 1.8 08:11:34 88.5 16.9 1.7 08:11:53 90.4 16.9 1.8 08:12:14 91.3 16.9 1.8 08:12:34 94.2 16.9 1.8 08:12:54 93.5 16.8 1.8 08:13:14 90.8 16.9 1.8 08:13:34 91.0 16.9 1.8 08:13:53 90.7 16.9 1.8 08:14:13 89.3 16.9 1.7 08:14:34 89.7 16.9 1.7 08:14:54 91.6 16.9 1.7 08:15:14 88.7 16.9 1.7 08:15:34 87.1 17.0 1.7 08:15:54 89.5 17.0 1.7 08:16:13 90.8 16.9 1.7 08:16:34 88.0 16.9 1.7 08:16:54 86.4 16.9 1.7 08:17:14 87.3 16.9 1.7 08:17:34 85.7 16.9 1.7 08:17:54 89.6 16.9 1.7 08:18:14 89.7 16.9 1.7 08:18:33 88.8 16.9 1.7 08:18:54 90.4 16.9 1.7 08:19:14 88.6 16.9 1.7 08:19:34 89.2 16.9 1.7 08:19:54 88.2 16.9 1.7 08:20:14 88.8 16.9 1.7 08:20:34 87.4 16.9 1.7 08:20:53 86.7 16.9 1.7 Run 1 Run 1 Run 1 Run 1 Run 1 Run 1 Run 1 Run 1 Run 1 Run 1 Run 1 Run 1 Run 1 Run 1 Run 1 Run 1 Run 1 Run 1 Run 1 Run 1 Run 1 Run 1 Run 1 Run 1 Page 3 of 16Northshore Mining

Time PPm Furnace 12 Waste Gas Stack 1205 Reference Method Data Logger Output

% % 07:29:34 0.1 -20.6 -0.1 08:21:14 87.2 16.9 1.7 Run 1 08:21:34 87.6 16.9 1.7 Run 1 08:21:54 89.9 16.9 1.8 Run 1 08:22:14 88.1 16.9 1.8 Run 1 08:22:34 89.2 16.9 1.8 Run 1 08:22:53 91.4 16.8 1.8 Run 1 08:23:13 89.9 16.8 1.8 Run 1 08:23:34 90.1 16.8 1.8 Run 1 08:23:54 90.3 16.8 1.8 Run 1 08:24:14 90.7 16.8 1.8 Run 1 08:24:34 92.4 16.8 1.8 Run 1 08:24:54 90.6 16.8 1.8 Run 1 08:25:13 89.8 16.8 1.8 Run 1 08:25:34 90.6 16.8 1.8 Run 1 08:25:54 94.1 16.8 1.8 Run 1 08:26:14 91.4 16.8 1.8 Run 1 08:26:34 91.6 16.8 1.8 Run 1 08:26:54 92.8 16.8 1.8 Run 1 08:27:14 90.7 16.8 1.8 Run 1 08:27:33 89.0 16.8 1.8 Run 1 08:27:54 89.8 16.9 1.7 Run 1 08:28:14 92.4 16.9 1.8 Run 1 08:28:34 91.6 16.8 1.8 Run 1 08:28:54 90.4 16.9 1.8 Run 1 08:29:14 88.6 16.9 1.8 Run 1 08:29:34 86.5 16.9 1.7 Run 1 08:29:53 89.8 16.9 1.8 Run 1 08:30:14 87.5 16.8 1.8 Run 1 08:30:34 87.1 16.8 1.8 Run 1 08:30:54 87.6 16.8 1.8 Run 1 08:31:14 85.9 16.8 1.8 Run 1 08:31:34 86.4 16.8 1.8 Run 1 08:31:53 86.6 16.8 1.8 Run 1 08:32:13

. 86.4 16.8 1.8 Run 1 08:32:34 84.9 16.8 1.8 Run 1 08:32:54 85.4 16.8 1.8 Run 1 08:33:14 85.9 16.8 1.8 Run 1 08:33:34 87.1 16.8 1.8 Run 1 08:33:54 86.6 16.8 1.8 Run 1 08:34:13 88.1 16.8 1.8 Run 1 08:34:34 85.8 16.8 1.8 Run 1 08:34:54 87.4 16.8 1.8 Run 1 08:35:14 88.3 16.8 1.8 Run 1 08:35:34 88.5 16.8 1.8 Run 1 08:35:54 88.4 16.8 1.8 Run 1 08:36:14 86.6 16.8 1.8 Run 1 08:36:33 86.1 16.9 1.8 Run 1 08:36:54 87.5 16.9 1.8 Run 1 08:37:14 83.4 16.9 1.7 Run 1 08:37:34 82.6 16.9 1.7 Run 1 08:37:54 87.2 16.9 1.7 Run 1 08:38:14 89.0 16.9 1.8 Run 1 08:38:34 88.2 16.8 1.8 Run 1 Barr Engineering

Page 4 of 16Northshore Mining

Time PPm Furnace 12 Waste Gas Stack 1205 Reference Method Data Logger Output

% % 07:29:34 0.1 -20.6 -0.1 08:38:53 86.1 16.9 1.8 Run 1 08:39:14 86.9 16.9 1.7 Run 1 08:39:34 86.5 16.9 1.7 Run 1 08:39:54 85.8 16.9 1.7 Run 1 08:40:14 86.6 16.9 1.7 Run 1 08:40:34 89.4 16.9 1.7 Run 1 08:40:53 85.4 16.9 1.8 Run 1 08:41:13 85.1 17.0 1.7 Run 1 08:41:34 83.1 17.0 1.7 Run 1 08:41:54 86.8 17.0 1.7 Run 1 08:42:14 85.2 16.9 1.7 Run 1 08:42:34 84.6 17.0 1.7 Run 1 08:42:54 84.0 17.0 1.7 Run 1 08:43:13 82.7 17.0 1.7 Run 1 08:43:34 87.1 16.9 1.7 Run 1 08:43:54 86.7 16.9 1.7 Run 1 08:44:14 83.3 16.9 1.8 Run 1 08:44:34 84.4 16.9 1.7 Run 1 08:44:54 83.5 16.9 1.7 Run 1 08:45:14 83.4 16.9 1.7 Run 1 08:45:33 83.7 16.9 1.7 Run 1 08:45:54 81.3 16.9 1.7 Run 1 08:46:14 83.6 16.9 1.7 Run 1 08:46:34 83.5 16.9 1.7 Run 1 08:46:54 82.8 16.9 1.7 Run 1 08:47:14 85.6 16.9 1.7 Run 1 08:47:34 85.6 16.9 1.7 Run 1 08:47:53 86.1 16.9 1.7 Run 1 08:48:14 84.6 16.9 1.7 Run 1 08:48:34 83.6 16.9 1.7 Run 1 08:48:54 81.7 16.9 1.7 Run 1 08:49:14 82.1 17.0 1.7 Run 1 08:49:34 85.6 17.0 1.7 Run 1 08:49:53 83.9 17.0 1.7 Run 1 08:50:13 80.7 17.0 1.7 Run 1 08:50:34 82.3 17.0 1.7 Run 1 08:50:54 81.1 17.0 1.7 Run 1 08:51:14 81.5 17.1 1.7 Run 1 08:51:34 80.6 17.0 1.7 Run 1 08:51:54 79.2 17.0 1.7 Run 1 08:52:13 78.0 17.1 1.7 Run 1 08:52:34 79.1 17.1 1.7 Run 1 08:52:54 81.5 17.0 1.7 Run 1 08:53:14 81.2 17.0 1.7 Run 1 08:53:34 80.6 17.0 1.7 Run 1 08:53:54 80.4 17.0 1.7 Run 1 08:54:14 81.9 17.0 1.7 Run 1 08:54:33 83.4 16.9 1.7 Run 1 08:54:54 82.6 16.9 1.7 Run 1 08:55:14 84.6 16.9 1.7 Run 1 08:55:34 82.8 16.9 1.7 Run 1 08:55:54 83.6 16.9 1.7 Run 1 08:56:14 83.9 16.9 1.7 Run 1 Barr Engineering

Page 5 of 16Northshore Mining

Time ppm Furnace 12 Waste Gas Stack 1205 Reference Method Data Logger Output

0 /0 07:29:34 0.1 -20.6 -0.1 08:56:34 84.6 16.9 1.7 Run 1 08:56:53 85.7 16.9 1.7 Run 1 08:57:14 83.8 16.9 1.7 Run 1 08:57:34 83.9 16.9 1.7 Run 1 08:57:54 83.7 16.9 1.7 Run 1 08:58:14 82.2 16.9 1.7 Run 1 08:58:34 81.0 16.9 1.7 Run 1 08:58:53 83.0 16.9 1.7 Run 1 08:59:13 87.8 16.9 1.7 Run 1 08:59:34 84.3 16.8 1.7 Run 1 08:59:54 83.6 16.9 1.7 Run 1 09:00:14 84.6 16.9 1.7 Run 1 09:00:34 83.4 16.9 1.7 Run 1 09:00:54 81.9 16.9 1.7 Run 1 09:01:13 83.4 16.9 1.7 Run 1 09:01:34 83.0 16.9 1.7 Run 1 09:01:54 83.0 16.9 1.7 Run 1 09:02:14 81.4 16.9 1.7 Run 1 09:02:34 85.9 16.9 1.7 Run 1 09:02:54 82.0 16.9 1.7 Run 1 09:03:14 83.1 16.9 1.7 Run 1 09:03:33 82.1 16.9 1.7 Run 1 09:03:54 81.1 17.0 1.7 Run 1 09:04:14 81.3 17.0 1.7 Run 1 09:04:34 79.6 17.0 1.7 Run 1 09:04:54 80.5 17.0 1.7 Run 1 09:05:14 80.6 17.0 1.7 Run 1 09:05:34 81.1 17.0 1.7 Run 1 09:05:53 80.4 17.0 1.7 Run 1 09:06:14 76.6 17.0 1.7 Run 1 09:06:34 77.8 17.0 1.7 Run 1 09:06:54 78.0 17.0 1.7 Run 1 09:07:14 77.2 17.0 1.7 Run 1 09:07:34 81.4 17.0 1.7 Run 1 09:07:53 82.8 17.0 1.7 Run 1 09:08:13 82.4 17.0 1.7 Run 1 09:08:34 84.0 17.0 1.7 Run 1 09:08:54 86.4 16.9 1.7 Run 1 09:09:14 83.7 16.9 1.7 Run 1 09:09:34 85.2 16.9 1.7 Run 1 09:09:54 87.6 16.9 1.7 Run 1 09:10:13 86.8 16.9 1.7 Run 1 09:10:33 87.7 16.9 1.7 Run 1 09:10:54 86.9 16.9 1.7 Run 1 09:11:14 86.1 17.0 1.7 Run 1 09:11:34 85.3 17.0 1.7 Run 1 09:11:54 85.6 17.0 1.7 Run 1 09:12:14 84.8 17.0 1.7 RUN 1 - 0813-0913 09:12:33 84.5 17.0 1.7 NOx ppm 0 2 

### % CO 2 % 09:12:54 84.5 17.0 1.7 85.6 16.9 1.7 09:13:14 83.7 17.0 1.7 09:13:34 83.1 17.0 1.7 Barr Engineering

Page 6 of 16Northshore Mining

Time ppm Furnace 12 Waste Gas Stack 1205 Reference Method Data Logger Output

% % 07:29:34 0.1 -20.6 -0.1 09:13:54 82.4 17.0 1.7 09:14:14 85.6 17.0 1.7 09:14:34 84.2 17.0 1.7 09:14:53 84.6 17.0 1.7 09:15:14 84.0 16.9 1.7 09:15:34 72.6 16.9 1.7 09:15:54 8.7 8.7 0.5 09:16:14 3.4 0.5 0.0 09:16:34 1.8 0.2 0.0 09:16:53 1.5 0.1 0.0 09:17:13 1.0 0.1 0.0 09:17:34 186.3 0.1 0.0 09:17:54 221.0 0.1 0.0 09:18:14 231.4 0.1 0.0 09:18:34 233.8 0.1 0.0 09:18:54 234.3 0.1 0.0 09:19:13 234.4 0.1 0.0 09:19:33 122.1 0.1 0.0 09:19:54 95.6 0.1 0.0 09:20:14 96.2 0.1 0.0 09:20:34 95.4 0.1 0.0 09:20:54 95.5 0.1 0.0 09:21:14 95.2 0.1 0.0 09:21:33 3.4 6.1 1.7 09:21:54 1.8 17.1 3.0 09:22:14 1.6 17.5 3.0 09:22:34 1.5 17.6 3.0 09:22:54 1.4 17.6 3.0 09:23:14 1.3 17.7 3.0 09:23:34 1.3 17.7 3.0

Time NOx 02 CO2 Time ppm ok % 09:25:03 0.1 14.1 1.0 09:25:24 0.0 0.6 0.0 09:25:44 0.2 0.1 0.0 09:26:04 0.1 0.0 0.0 09:26:24 0.1 0.0 0.0 09:26:44 0.0 0.0 0.0 09:27:03 0.0 0.0 0.0 09:27:23 96.9 0.1 0.0 09:27:44 95.8 0.1 0.0 09:28:04 95.8 0.0 0.0 09:28:24 96.0 0.0 0.0 09:28:44 44.2 0.0 0.0 09:29:04 44.7 0.0 0.0 09:29:23 44.6 0.0 0.0 09:29:44 82.4 0.8 0.3 09:30:04 34.4 14.5 1.8 09:30:24 1.4 15.3 1.9 09:30:44 0.9 1.7 0.1 09:31:04 0.7 0.2 0.1 09:31:24 0.2 0.1 0.0 Barr Engineering

Page 7 of 16Northshore Mining

Time 07:29:34 PPm 0.1 Furnace 12 Waste Gas Stack 1205 Reference Method Data Logger Output

% % -20.6 -0.1 09:31:43 0.3 0.1 0.0 09:32:04 0.3 0.1 0.0 09:32:24 0.4 0.1 0.0 09:32:44 75.0 0.1 0.0 09:33:04 92.5 0.1 0.0 09:33:24 92.9 0.1 0.0 09:33:43 94.5 0.1 0.0 09:34:03 94.0 0.1 0.0 09:34:24 94.2 0.1 0.0 09:34:44 82.2 1.2 0.2 09:35:04 1.3 0.3 0.0 09:35:24 0.3 0.1 0.0 09:35:44 81.0 1.8 0.5 09:36:03 84.3 15.5 1.7 09:36:23 84.6 17.0 1.7 09:36:44 83.5 17.1 1.7 09:37:04 84.3 17.1 1.7 09:37:24 84.9 17.0 1.7 09:37:44 87.1 17.0 1.7 09:38:04 85.7 17.0 1.7 Run 2 09:38:23 86.0 17.0 1.7 Run 2 09:38:44 87.8 17.0 1.7 Run 2 09:39:04 85.5 17.0 1.7 Run 2 09:39:24 85.0 17.0 1.7 Run 2 09:39:44 88.1 17.0 1.7 Run 2 09:40:04 90.1 17.0 1.7 Run 2 09:40:24 89.7 17.0 1.8 Run 2 09:40:43 91.4 17.0 1.8 Run 2 09:41:04 90.8 17.0 1.8 Run 2 09:41:24 88.3 17.0 1.8 Run 2 09:41:44 87.3 17.0 1.7 Run 2 09:42:04 88.0 17.0 1.7 Run 2 09:42:24 87.0 17.0 1.7 Run 2 09:42:43 88.5 17.1 1.7 Run 2 09:43:03 86.2 17.0 1.7 Run 2 09:43:24 85.6 17.1 1.7 Run 2 09:43:44 85.5 17.1 1.7 Run 2 09:44:04 88.5 17.0 1.7 Run 2 09:44:24 87.2 17.0 1.7 Run 2 09:44:44 85.0 17.1 1.7 Run 2 09:45:03 86.8 17.1 1.7 Run 2 09:45:23 86.8 17.0 1.7 Run 2 09:45:44 87.5 17.1 1.7 Run 2 09:46:04 90.4 17.1 1.7 Run 2 09:46:24 89.0 17.1 1.7 Run 2 09:46:44 88.3 17.1 1.7 Run 2 09:47:04 89.4 17.1 1.7 Run 2 09:47:23 87.3 17.1 1.7 Run 2 09:47:44 88.3 17.1 1.7 Run 2 09:48:04 87.0 17.1 1.7 Run 2 09:48:24 87.6 17.1 1.7 Run 2 09:48:44 87.6 17.1 1.7 Run 2 09:49:04 86.8 17.0 1.7 Run 2 Barr Engineering

Page 8 of 16Northshore Mining

Time PPm Furnace 12 Waste Gas Stack 1205 Reference Method Data Logger Output oh, °A 07:29:34 0.1 -20.6 -0.1 09:49:24 86.8 17.1 1.7 Run 2 09:49:43 85.9 17.0 1.7 Run 2 09:50:04 89.8 17.0 1.7 Run 2 09:50:24 89.1 17.0 1.8 Run 2 09:50:44 89.4 17.0 1.8 Run 2 09:51:04 91.7 17.0 1.8 Run 2 09:51:24 91.2 16.9 1.8 Run 2 09:51:43 89.7 16.9 1.8 Run 2 09:52:03 89.9 16.9 1.8 Run 2 09:52:24 90.3 16.9 1.8 Run 2 09:52:44 91.5 16.9 1.8 Run 2 09:53:04 91.7 16.9 1.8 Run 2 09:53:24 90.3 16.9 1.8 Run 2 09:53:44 91.2 16.9 1.8 Run 2 09:54:03 91.5 16.9 1.8 Run 2 09:54:23 90.2 16.9 1.8 Run 2 09:54:44 91.6 16.9 1.8 Run 2 09:55:04 91.5 16.9 1.8 Run 2 09:55:24 90.8 16.9 1.8 Run 2 09:55:44 90.3 16.9 1.8 Run 2 09:56:04 90.2 16.9 1.8 Run 2 09:56:23 93.1 17.0 1.8 Run 2 09:56:43 93.5 16.9 1.8 Run 2 09:57:04 90.4 16.9 1.8 Run 2 09:57:24 89.2 17.0 1.8 Run 2 09:57:44 88.5 17.0 1.8 Run 2 09:58:04 91.6 17.0 1.8 Run 2 09:58:24 89.8 16.9 1.8 Run 2 09:58:43 88.3 17.0 1.8 Run 2 09:59:04 89.9 17.0 1.8 Run 2 09:59:24 88.6 17.0 1.8 Run 2 09:59:44 87.2 17.0 1.8 Run 2 10:00:04 87.1 17.0 1.8 Run 2 10:00:24 86.2 17.0 1.8 Run 2 10:00:43 85.4 17.0 1.8 Run 2 10:01:03 85.1 17.0 1.8 Run 2 10:01:24 85.4 17.0 1.8 Run 2 10:01:44 84.6 17.0 1.7 Run 2 10:02:04 85.7 17.0 1.8 Run 2 10:02:24 88.5 17.0 1.8 Run 2 10:02:44 87.2 16.9 1.8 Run 2 10:03:03 87.3 17.0 1.8 Run 2 10:03:23 87.0 17.0 1.8 Run 2 10:03:44 90.4 17.0 1.8 Run 2 10:04:04 86.8 17.0 1.8 Run 2 10:04:24 88.3 17.0 1.8 Run 2 10:04:44 89.9 17.0 1.8 Run 2 10:05:04 90.0 17.0 1.8 Run 2 10:05:23 86.7 17.0 1.8 Run 2 10:05:43 86.0 17.0 1.7 Run 2 10:06:04 89.8 17.0 1.7 Run 2 10:06:24 91.3 16.9 1.8 Run 2 10:06:44 90.1 16.9 1.8 Run 2 Barr Engineering

Page 9 of 16Nodhshore Mining

Time PPm Furnace 12 Waste Gas Stack 1205 Reference Method Data Logger Output

°/0 % 07:29:34 0.1 -20.6 -0.1 10:07:04 89.3 17.0 1.8 Run 2 10:07:24 90.4 17.0 1.8 Run 2 10:07:43 89.6 16.9 1.8 Run 2 10:08:04 90.3 17.0 1.8 Run 2 10:08:24 90.3 17.0 1.8 Run 2 10:08:44 94.0 17.0 1.8 Run 2 10:09:04 90.1 16.9 1.8 Run 2 10:09:24 88.7 17.0 1.7 Run 2 10:09:43 87.3 17.0 1.7 Run 2 1 0:1 0:03 90.0 17.0 1.7 Run 2 10:10:24 89.3 17.0 1.7 Run 2 1 0:10:44 88.3 17.0 1.7 Run 2 10:11:04 86.8 17.0 1.7 Run 2 1 0:11:24 87.9 17.0 1.7 Run 2 1 0:11 :44 87.9 17.0 1.7 Run 2 10:12:03 87.5 17.0 1.7 Run 2 10:12:23 90.1 17.0 1.8 Run 2 10:12:44 86.8 17.0 1.8 Run 2 10:13:04 86.1 17.0 1.7 Run 2 10:13:24 86.0 17.0 1.7 Run 2 10:13:44 87.3 17.0 1.7 Run 2 10:14:04 86.2 17.0 1.8 Run 2 10:14:23 85.7 17.0 1.7 Run 2 10:14:43 86.2 17.0 1.7 Run 2 10:15:04 87.5 17.0 1.7 Run 2 10:15:24 87.1 17.0 1.8 Run 2 10:15:44 89.4 17.0 1.8 Run 2 10:16:04 90.2 17.0 1.7 Run 2 10:16:24 87.8 17.0 1.7 Run 2 10:1 6:43 89.8 17.0 1.7 Run 2 1 0:17:04 86.3 17.0 1.7 Run 2 10:17:24 88.7 17.1 1.7 Run 2 10:17:44 92.5 17.0 1.7 Run 2 10:18:04 89.1 17.0 1.8 Run 2 10:18:24 86.0 17.0 1.7 Run 2 10:18:43 89.0 17.0 1.7 Run 2 10:19:03 85.8 17.0 1.7 Run 2 10:19:24 87.4 17.1 1.7 Run 2 10:19:44 86.4 17.0 1.7 Run 2 10:20:04 86.2 17.0 1.7 Run 2 10:20:24 85.6 17.0 1.7 Run 2 10:20:44 86.2 17.0 1.7 Run 2 10:21:03 85.4 17.0 1.7 Run 2 10:21 :23 87.6 17.0 1.7 Run 2 10:21:44 86.0 17.0 1.7 Run 2 10:22:04 85.8 17.0 1.7 Run 2 10:22:24 87.7 17.0 1.7 Run 2 10:22:44 88.7 17.0 1.7 Run 2 10:23:04 87.0 17.0 1.7 Run 2 10:23:23 89.0 17.0 1.7 Run 2 10:23:43 88.1 17.0 1.7 Run 2 10:24:04 87.3 17.0 1.7 Run 2 10:24:24 89.0 17.0 1.7 Run 2 Barr Engineering

Page 10 of 16Barr Engineering Northshore Mining

Time ppm Furnace 12 Waste Gas Stack 1205 Reference Method Data Logger Output

% % 07:29:34 0.1 -20.6 -0.1 10:24:44 88.7 17.0 1.7 Run 2 10:25:04 88.9 17.0 1.7 Run 2 10:25:24 87.4 17.0 1.7 Run 2 10:25:43 86.9 17.0 1.7 Run 2 10:26:04 88.0 17.0 1.7 Run 2 10:26:24 84.9 17.0 1.7 Run 2 10:26:44 84.2 17.1 1.7 Run 2 10:27:04 84.1 17.1 1.7 Run 2 10:27:24 90.3 17.1 1.7 Run 2 10:27:43 85.8 17.0 1.7 Run 2 10:28:03 86.0 17.0 1.7 Run 2 10:28:24 86.9 17.0 1.7 Run 2 10:28:44 87.7 17.0 1.7 Run 2 10:29:04 86.3 17.0 1.7 Run 2 10:29:24 89.5 17.0 1.7 Run 2 10:29:44 87.5 17.0 1.7 Run 2 10:30:03 87.9 17.0 1.7 Run 2 10:30:23 87.8 17.0 1.7 Run 2 10:30:44 89.4 17.0 1.7 Run 2 10:31:04 87.3 17.0 1.7 Run 2 10:31:24 87.8 17.0 1.7 Run 2 10:31:44 87.3 17.0 1.7 Run 2 10:32:04 87.0 17.0 1.7 Run 2 10:32:23 84.9 17.0 1.7 Run 2 10:32:43 83.5 17.0 1.7 Run 2 10:33:04 85.4 17.1 1.7 Run 2 10:33:24 , 82.8 17.1 1.7 Run 2 10:33:44 83.6 17.1 1.7 Run 2 10:34:04 84.6 17.1 1.7 Run 2 10:34:24 80.9 17.1 1.7 Run 2 10:34:43 83.3 17.1 1.7 Run 2 10:35:04 84.8 17.1 1.7 Run 2 10:35:24 80.1 17.1 1.7 Run 2 10:35:44 82.8 17.1 1.7 Run 2 10:36:04 83.5 17.1 1.7 Run 2 10:36:24 84.3 17.1 1.7 Run 2 10:36:43 82.9 17.1 1.7 Run 2 10:37:03 86.2 17.1 1.7 RUN 2 - 0938-1038 10:37:24 86.9 17.0 1.7 NOx ppm 0 2 % CO 2 

### % 10:37:44 88.2 17.0 1.7 87.8 17.0 1.7 10:38:04 89.8 17.0 1.7 10:38:24 88.9 17.0 1.7 10:38:44 90.5 17.0 1.7 10:39:03 88.9 17.1 1.7 10:39:23 67.9 17.1 1.7 10:39:44 3.5 7.7 0.4 10:40:04 0.9 0.4 0.1 10:40:24 0.7 0.2 0.1 10:40:44 0.7 0.1 0.0 10:41:04 0.6 0.1 0.0 10:41:23 0.6 0.1 0.0 10:41:43 0.5 0.1 0.0
Page 11 of 16CO2 % 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 Run 3 Run 3 Run 3 Run 3 Run 3 Run 3 Run 3 Run 3 Run 3 Run 3 Run 3 Run 3 Run 3 Run 3 Run 3 Run 3 Run 3 Run 3 Run 3 Run 3 Run 3 Run 3 Run 3 Run 3 Run 3 Northshore Mining

Time ppm Furnace 12 Waste Gas Stack 1205 Reference Method Data Logger Output

% % 07:29:34 0.1 -20.6 -0.1 10:42:04 63.0 0.1 0.0 10:42:24 90.5 0.1 0.0 10:42:44 92.2 0.1 0.0 10:43:04 93.3 0.1 0.0 10:43:24 94.0 0.1 0.0 10:43:43 94.3 0.1 0.0 10:44:04 94.3 0.1 0.0 10:44:24 4.4 2.6 1.0 10:44:44 1.1 16.6 2.9 10:45:04 0.7 17.6 3.0 10:45:24 0.6 17.6 3.0 10:45:43 0.5 17.7 3.0 10:46:03 0.7 17.7 3.0 10:46:24 0.5 16.5 2.3 10:46:44 0.4 2.3 0.2 10:47:04 0.3 0.2 0.1 10:47:24 0.4 0.1 0.1 10:47:44 2.5 0.1 0.1 10:48:03 89.6 8.3 1.3 

# 1 Time Time 10:49:09 10:49:29 10:49:49 10:50:09 10:50:29 10:50:48 NOx ppm 88.9 87.4 85.0 85.0 83.8 84.1 02 % 17.0 17.0 17.0 17.0 17.0 17.0 10:51:08 86.4 17.0 10:51:29 87.4 17.0 10:51:49 87.2 17.0 10:52:09 87.6 17.0 10:52:29 85.9 17.0 10:52:49 89.2 17.0 10:53:08 87.4 17.0 10:53:28 87.9 17.0 10:53:49 92.3 16.9 10:54:09 90.3 16.9 10:54:29 90.4 16.9 10:54:49 90.7 16.9 10:55:09 92.5 16.9 10:55:28 89.2 16.9 10:55:48 89.9 17.0 10:56:09 89.7 17.0 10:56:29 90.7 17.0 10:56:49 87.8 17.0 10:57:09 87.1 17.0 10:57:29 86.7 17.0 10:57:48 88.5 17.0 10:58:09 88.9 17.0 10:58:29 87.2 17.0 10:58:49 90.5 17.0 10:59:09 90.3 17.0 Page 12 of 16 Barr EngineeringNorthshore Mining

Time PPm Furnace 12 Waste Gas Stack 1205 Reference Method Data Logger Output

% % 07:29:34 0.1 -20.6 -0.1 10:59:29 87.1 17.0 1.7 Run 3 10:59:48 84.7 17.0 1.7 Run 3 11:00:08 88.3 17.0 1.7 Run 3 11:00:29 87.6 17.0 1.7 Run 3 11:00:49 87.3 17.0 1.7 Run 3 11:01:09 88.1 17.0 1.7 Run 3 1 1 :01 :29 85.4 17.0 1.7 Run 3 11:01:49 85.1 17.0 1.7 Run 3 11:02:08 84.3 17.0 1.7 Run 3 11:02:28 84.9 17.0 1.7 Run 3 11:02:49 84.3 17.0 1.7 Run 3 11:03:09 88.5 17.0 1.7 Run 3 11:03:29 91.5 17.0 1.7 Run 3 11:03:49 88.1 17.0 1.7 Run 3 11:04:09 87.6 17.0 1.7 Run 3 11:04:28 84.8 17.0 1.7 Run 3 11:04:48 84.6 17.0 1.7 Run 3 11:05:09 85.7 17.0 1.7 Run 3 11:05:29 85.1 17.0 1.7 Run 3 11:05:49 87.1 17.0 1.7 Run 3 11:06:09 84.7 17.0 1.7 Run 3 11:06:29 85.1 17.0 1.7 Run 3 11:06:48 85.2 17.0 1.7 Run 3 11:07:09 84.7 17.0 1.7 Run 3 11:07:29 85.4 17.0 1.7 Run 3 11:07:49 87.9 17.0 1.7 Run 3 11:08:09 89.5 17.0 1.7 Run 3 11:08:29 90.0 16.9 1.7 Run 3 11:08:48 90.2 16.9 1.7 Run 3 11:09:08 88.0 17.0 1.7 Run 3 11:09:29 87.3 17.0 1.7 Run 3 11:09:49 87.9 17.0 1.7 Run 3 11:10:09 89.9 17.0 1.7 Run 3 11:10:29 87.8 17.0 1.7 Run 3 11:1 0:49 90.3 17.0 1.7 Run 3 11:11:08 89.4 17.0 1.7 Run 3 11:11:28 89.1 17.0 1.7 Run 3 11:11:49 88.8 17.0 1.7 Run 3 11:12:09 91.2 16.9 1.7 Run 3 11:12:29 89.1 16.9 1.7 Run 3 11 :12:49 86.7 16.9 1.7 Run 3 11:13:09 88.5 17.0 1.7 Run 3 11:13:28 89.6 16.9 1.7 Run 3 11:13:48 89.3 16.9 1.7 Run 3 11:14:09 91.0 16.9 1.7 Run 3 11:14:29 91.4 16.9 1.7 Run 3 11 :14:49 90.2 16.9 1.7 Run 3 11:15:09 90.3 16.9 1.7 Run 3 11:15:29 90.0 16.9 1.7 Run 3 11:15:48 88.4 16.9 1.7 Run 3 11 :16:08 90.8 16.9 1.7 Run 3 11:16:29 93.1 16.9 1.7 Run 3 11:16:49 89.4 16.8 1.7 Run 3 Barr Engineering

Page 13 of 16Northshore Mining

Time PPm Furnace 12 Waste Gas Stack 1205 Reference Method Data Logger Output

% % 07:29:34 0.1 -20.6 -0.1 11:17:09 89.1 16.9 1.7 Run 3 11:17:29 90.0 16.9 1.7 Run 3 11:17:48 89.8 16.9 1.7 Run 3 11:18:08 92.9 16.9 1.7 Run 3 11:18:29 88.2 16.9 1.7 Run 3 11:18:49 89.5 16.9 1.7 Run 3 11:19:09 92.0 16.9 1.7 Run 3 11:19:29 88.5 16.9 1.7 Run 3 11:19:49 91.2 16.9 1.7 Run 3 11:20:08 92.0 16.9 1.7 Run 3 11:20:28 90.8 16.9 1.7 Run 3 11:20:49 92.5 16.9 1.7 Run 3 11:21:09 92.2 16.9 1.7 Run 3 11:21:29 90.2 16.9 1.7 Run 3 11:21:49 93.0 16.9 1.7 Run 3 11:22:09 91.3 16.8 1.7 Run 3 11:22:28 89.8 16.9 1.7 Run 3 11:22:48 93.5 16.9 1.7 Run 3 11:23:09 91.5 16.9 1.7 Run 3 11:23:29 89.7 16.9 1.7 Run 3 11:23:49 90.3 16.9 1.7 Run 3 11:24:09 88.1 16.9 1.7 Run 3 11:24:29 89.9 16.9 1.7 Run 3 11:24:48 92.3 16.9 1.7 Run 3 11:25:08 90.7 16.9 1.7 Run 3 11:25:29 86.5 16.9 1.7 Run 3 11:25:49 87.3 16.9 1.7 Run 3 11:26:09 90.7 16.9 1.7 Run 3 11:26:29 89.3 16.8 1.7 Run 3 11:26:48 87.9 16.9 1.7 Run 3 11:27:08 88.8 16.9 1.7 Run 3 11:27:29 87.8 16.9 1.7 Run 3 11:27:49 87.7 16.8 1.7 Run 3 11:28:09 86.6 16.9 1.7 Run 3 11:28:29 86.1 16.9 1.7 Run 3 11:28:49 86.1 16.9 1.7 Run 3 11:29:08 86.3 16.9 1.7 Run 3 11:29:28 87.0 16.9 1.7 Run 3 11:29:49 87.7 16.9 1.7 Run 3 11:30:09 88.5 16.9 1.7 Run 3 11:30:29 92.6 16.9 1.7 Run 3 11:30:49 88.5 16.9 1.7 Run 3 11:31:09 89.4 16.9 1.7 Run 3 11:31:28 89.1 16.9 1.7 Run 3 11:31:48 90.1 16.9 1.7 Run 3 11:32:09 90.0 16.9 1.7 Run 3 11:32:29 89.5 16.9 1.7 Run 3 11:32:49 89.1 16.9 1.7 Run 3 11:33:09 86.0 16.9 1.7 Run 3 11:33:29 84.2 17.0 1.6 Run 3 11:33:48 85.1 17.0 1.6 Run 3 11:34:08 91.9 17.0 1.7 Run 3 11:34:29 91.8 16.9 1.7 Run 3 Barr Engineering

Page 14 of 16Barr Engineering Northshore Mining

Time ppm Furnace 12 Waste Gas Stack 1205 Reference Method Data Logger Output

% % 07:29:34 0.1 -20.6 -0.1 11:34:49 87.9 16.9 1.7 Run 3 11:35:09 86.8 16.9 1.7 Run 3 11:35:29 90.2 16.9 1.7 Run 3 11:35:48 87.3 16.9 1.7 Run 3 11:36:08 87.6 16.9 1.7 Run 3 11:36:29 91.0 16.9 1.7 Run 3 11:36:49 89.6 16.9 1.7 Run 3 11:37:09 88.5 16.9 1.7 Run 3 11:37:29 88.4 16.9 1.7 Run 3 11:37:49 85.8 16.9 1.7 Run 3 11:38:08 88.3 17.0 1.6 Run 3 11:38:28 88.3 16.9 1.7 Run 3 11:38:49 85.5 17.0 1.6 Run 3 11:39:09 84.4 17.0 1.6 Run 3 11:39:29 85.9 17.0 1.6 Run 3 11:39:49 87.6 17.0 1.6 Run 3 11:40:09 86.9 16.9 1.7 Run 3 11:40:28 90.0 16.9 1.7 Run 3 11:40:48 86.5 16.9 1.7 Run 3 11:41:09 86.5 16.9 1.7 Run 3 11:41:29 85.0 17.0 1.6 Run 3 11:41:49 86.0 16.9 1.7 Run 3 11:42:09 85.6 16.9 1.7 Run 3 11:42:29 85.0 17.0 1.6 Run 3 11:42:48 87.4 17.0 1.7 Run 3 11:43:08 87.1 16.9 1.7 Run 3 11:43:29 87.5 16.9 1.6 Run 3 11:43:49 88.2 16.9 1.7 Run 3 11:44:09 87.5 17.0 1.6 Run 3 11:44:29 85.8 17.0 1.6 Run 3 11:44:48 84.4 17.0 1.6 Run 3 11:45:08 84.4 17.0 1.6 Run 3 11:45:29 86.5 17.0 1.6 Run 3 11:45:49 90.4 17.0 1.7 Run 3 11:46:09 88.1 16.9 1.7 Run 3 11:46:29 85.6 17.0 1.6 Run 3 11:46:49 86.8 17.0 1.6 Run 3 11:47:08 86.5 17.0 1.6 Run 3 11:47:28 86.0 17.0 1.6 Run 3 11:47:49 85.6 17.0 1.6 Run 3 11:48:09 84.2 17.0 1.6 Run 3 11:48:29 83.5 17.0 1.6 Run 3 11:48:49 82.8 17.0 1.6 Run 3 11:49:09 84.2 17.0 1.6 Run 3 11:49:28 84.4 17.0 1.6 Run 3 11:49:48 82.5 17.0 1.6 Run 3 11:50:09 84.2 17.0 1.6 RUN 3 - 1051-1151 11:50:29 83.0 17.0 1.6 NOx ppm 0 2 

### % CO 2 

### % 11:50:49 85.6 17.0 1.6 88.1 16.9 1.7 11:51:09 85.2 17.0 1.6 11:51:29 88.5 17.0 1.6 11:51:48 86.9 17.0 1.6
Page 15 of 16Northshore Mining Furnace 12 Waste Gas Stack 1205 Reference Method Data Logger Output

Time ppm % % 07:29:34 0.1 -20.6 -0.1 11:52:08 88.8 17.0 1.6 11:52:29 89.4 17.0 1.6 11:52:49 89.4 17.0 1.6 11:53:09 5.6 11.3 0.8 11:53:29 0.8 0.7 0.1 11:53:48 0.4 0.2 0.1 11:54:08 0.3 0.1 0.1 11:54:29 0.3 0.1 0.0 11:54:49 70.7 0.2 0.1 11:55:09 92.0 0.1 0.0 11:55:29 93.3 0.1 0.0 11:55:49 93.3 0.1 0.0 11:56:08 93.2 0.1 0.0 11:56:28 93.4 0.1 0.0 11:56:49 93.3 0.1 0.0 11:57:09 16.5 0.6 0.5 11:57:29 1.1 14.7 2.8 11:57:49 0.6 17.5 2.9 11:58:09 0.6 17.6 2.9 11:58:28 0.4 17.6 3.0 Barr Engineering

Page 16 of 16Northshore Mining Furnace 12 Hood Exhaust 1203 Barr Engineering Reference Method Data Logger Output North Shore Mining Silver Bay, Minnesota Furnace 12 Hood Exhaust 1203 The time is 13:45:21.86. The date is 12-20-2000. Time NOx 02 CO2 Time ppm ok % 13:45:43 -0.7 0.0 -0.1 13:46:02 -0.8 0.0 -0.1 13:46:22 -0.9 0.0 -0.1 13:46:42 -0.7 0.0 -0.1 13:47:03 -0.7 0.0 -0.1 13:47:23 -0.8 0.0 -0.1 13:47:43 -0.8 0.0 -0.1 13:48:03 0.0 0.0 -0.1 13:48:22 0.1 0.0 0.0 13:48:42 0.2 0.0 0.0 13:49:02 0.2 0.0 0.0 13:49:23 0.0 9.1 2.4 13:49:43 0.1 18.0 3.1 13:50:03 0.3 18.2 3.1 13:50:23 0.2 18.2 3.1 13:50:42 0.2 18.1 3.0 13:51:02 0.2 17.5 4.9 13:51:23 0.1 10.7 9.9 13:51:43 0.1 10.1 9.9 13:52:03 0.1 10.1 10.0 13:52:23 29.1 6.2 3.1 13:52:43 46.1 0.2 0.0 13:53:02 44.8 0.1 0.0 13:53:22 91.4 0.0 0.0 13:53:43 97.3 0.1 0.0 13:54:03 96.2 0.0 0.0 13:54:23 96.3 0.0 0.0 13:54:43 1.0 0.0 0.0 13:55:02 , 0.2 0.0 0.0 13:55:22 24.1 7.2 0.2 13:55:42 23.5 19.2 0.4 13:56:03 9.7 19.5 0.5 13:56:23 1.0 17.7 0.3 13:56:43 0.7 2.0 0.0 13:57:03 0.8 0.3 0.0 13:57:22 0.7 0.1 0.0 13:57:42 0.6 0.1 0.0 13:58:02 0.7 0.1 0.0 13:58:23 0.5 0.1 0.0 13:58:43 0.6 0.1 0.0 13:59:03 0.5 0.1 0.0 13:59:23 42.1 0.1 0.0 13:59:42 43.3 0.1 0.0 14:00:02 44.3 0.1 0.0 14:00:22 44.5 0.1 0.0 14:00:43 31.4 0.1 0.1 14:01:03 1.3 10.8 2.6 14:01:23 1.1 17.3 2.9 Page 1 of 14Northshore Mining Furnace 12 Hood Exhaust 1203 Reference Method Data Logger Output

Time NOx 02 CO2 Time ppm ok % 14:01:43 1.0 17.6 3.0 14:02:02 0.8 17.7 3.0 14:02:22 0.8 17.7 3.0 14:02:43 0.8 17.7 3.0 14:03:03 0.7 10.3 1.1 14:03:23 0.8 0.5 0.1 14:03:43 22.4 2.7 0.2 14:04:02 23.2 18.1 0.4 14:04:22 22.0 19.3 0.4 14:04:42 22.7 19.4 0.4 Barr Engineering

14:05:03 24.1 19.4 0.4 Run 1 14:05:23 22.6 19.4 0.4 Run 1 14:05:43 23.1 19.4 0.4 Run 1 14:06:03 23.6 19.4 0.4 Run 1 14:06:22 23.2 19.4 0.4 Run 1 14:06:42 23.2 19.4 0.4 Run 1 14:07:02 23.1 19.4 0.4 Run 1 14:07:23 23.7 19.4 0.4 Run 1 14:07:43 23.7 19.4 0.4 Run 1 14:08:03 23.1 19.4 0.4 Run 1 14:08:23 23.4 19.4 0.4 Run 1 14:08:42 23.9 19.4 0.4 Run 1 14:09:02 21.7 19.4 0.4 Run 1 14:09:22 23.5 19.5 0.4 Run 1 14:09:43 23.2 19.4 0.4 Run 1 14:10:03 21.9 19.4 0.4 Run 1 14:10:23 22.9 19.4 0.4 Run 1 14:10:43 22.0 19.4 0.4 Run 1 14:11:02 20.8 19.5 0.4 Run 1 14:11:22 22.6 19.5 0.4 Run 1 14:11:43 23.4 19.4 0.4 Run 1 14:12:03 22.3 19.4 0.4 Run 1 14:12:23 21.8 19.4 0.4 Run 1 14:12:43 21.9 19.4 0.4 Run 1 14:13:02 23.3 19.4 0.4 Run 1 14:13:22 22.8 19.4 0.4 Run 1 14:13:42 21.7 19.4 0.4 Run 1 14:14:03 23.3 19.4 0.4 Run 1 14:14:23 22.9 19.4 0.4 Run 1 14:14:43 20.6 19.4 0.4 Run 1 14:15:03 21.8 19.4 0.4 Run 1 14:15:22 22.4 19.4 0.4 Run 1 14:15:42 22.6 19.4 0.4 Run 1 14:16:02 22.6 19.4 0.4 Run 1 14:16:23 22.5 19.4 0.4 Run 1 14:16:43 23.0 19.4 0.4 Run 1 14:17:03 22.5 19.4 0.4 Run 1 14:17:23 21.5 19.4 0.4 Run 1 14:17:42 21.7 19.4 0.4 Run 1 14:18:02 21.8 19.4 0.4 Run 1 14:18:22 20.5 19.4 0.4 Run 1 14:18:43 22.4 19.5 0.4 Run 1 14:19:03 20.8 19.4 0.4 Run 1 Page 2 of 14Northshore Mining

Time Time NOx PPm Furnace 12 Hood Exhaust 1203 Reference Method Data Logger Output

02 CO2 0/0 % 14:19:23 21.0 19.5 0.4 Run 1 14:19:43 22.3 19.5 0.4 Run 1 14:20:02 22.3 19.4 0.4 Run 1 14:20:22 22.5 19.4 0.4 Run 1 14:20:43 22.0 19.4 0.4 Run 1 14:21:03 22.7 19.4 0.4 Run 1 14:21:23 22.1 19.4 0.4 Run 1 14:21:43 22.8 19.4 0.4 Run 1 14:22:02 22.1 19.4 0.4 Run 1 14:22:22 23.8 19.4 0.4 Run 1 14:22:42 23.1 19.4 0.4 Run 1 14:23:03 22.4 19.4 0.4 Run 1 14:23:23 22.9 19.4 0.4 Run 1 14:23:43 22.7 19.4 0.4 Run 1 14:24:03 23.0 19.4 0.4 Run 1 14:24:22 23.4 19.4 0.4 Run 1 14:24:42 22.1 19.4 0.4 Run 1 14:25:02 23.4 19.4 0.4 Run 1 14:25:23 23.9 19.4 0.4 Run 1 14:25:43 24.0 19.4 0.4 Run 1 14:26:03 22.9 19.4 0.4 Run 1 14:26:23 23.7 19.4 0.4 Run 1 14:26:42 24.6 19.4 0.4 Run 1 14:27:02 23.6 19.4 0.4 Run 1 14:27:22 24.0 19.4 0.4 Run 1 14:27:43 24.4 19.4 0.4 Run 1 14:28:03 24.7 19.4 0.4 Run 1 14:28:23 22.4 19.4 0.4 Run 1 14:28:43 21.1 19.4 0.4 Run 1 14:29:02 22.4 19.4 0.4 Run 1 14:29:22 22.6 19.4 0.4 Run 1 14:29:43 22.4 19.4 0.4 Run 1 14:30:03 22.0 19.4 0.4 Run 1 14:30:23 22.1 19.4 0.4 Run 1 14:30:43 21.0 19.4 0.4 Run 1 14:31:02 21.8 19.4 0.4 Run 1 14:31:22 22.7 19.4 0.4 Run 1 14:31:42 22.9 19.4 0.4 Run 1 14:32:03 23.9 19.4 0.4 Run 1 14:32:23 21.6 19.4 0.4 Run 1 14:32:43 23.2 19.4 0.4 Run 1 14:33:03 23.5 19.4 0.4 Run 1 14:33:22 23.4 19.4 0.4 Run 1 14:33:42 24.0 19.4 0.4 Run 1 14:34:02 22.6 19.4 0.4 Run 1 14:34:23 22.5 19.4 0.4 Run 1 14:34:43 21.9 19.4 0.4 Run 1 14:35:03 23.1 19.4 0.4 Run 1 14:35:23 22.3 19.4 0.4 Run 1 14:35:42 22.8 19.4 0.4 Run 1 14:36:02 22.8 19.4 0.4 Run 1 14:36:22 23.0 19.4 0.4 Run 1 14:36:43 23.4 19.4 0.4 Run 1 Barr Engineering

Page 3 of 14Northshore Mining

Time Time NOx ppm Furnace 12 Hood Exhaust 1203 Reference Method Data Logger Output

02 CO2

14:37:03 23.4 19.4 0.4 Run 1 14:37:23 22.9 19.4 0.4 Run 1 14:37:43 22.8 19.4 0.4 Run 1 14:38:02 22.8 19.4 0.4 Run 1 14:38:22 23.2 19.4 0.4 Run 1 14:38:43 23.0 19.4 0.4 Run 1 14:39:03 24.5 19.4 0.4 Run 1 14:39:23 24.1 19.3 0.4 Run 1 14:39:43 23.4 19.4 0.4 Run 1 14:40:02 20.8 19.4 0.4 Run 1 14:40:22 21.3 19.4 0.4 Run 1 14:40:42 22.5 19.4 0.4 Run 1 14:41:03 21.9 19.4 0.4 Run 1 14:41:23 21.7 19.4 0.4 Run 1 14:41:43 21.3 19.4 0.4 Run 1 14:42:03 21.3 19.4

. 0.4 Run 1 14:42:22 21.6 19.4 0.4 Run 1 14:42:42 22.4 19.4 0.4 Run 1 14:43:02 22.3 19.4 0.4 Run 1 14:43:23 22.3 19.4 0.4 Run 1 14:43:43 22.0 19.4 0.4 Run 1 14:44:03 22.3 19.4 0.4 Run 1 14:44:23 21.9 19.4 0.4 Run 1 14:44:42 22.6 19.4 0.4 Run 1 14:45:02 22.6 19.4 0.4 Run 1 14:45:22 22.0 19.4 0.4 Run 1 14:45:43 20.6 19.4 0.4 Run 1 14:46:03 21.6 19.4 0.4 Run 1 14:46:23 22.1 19.4 0.4 Run 1 14:46:43 20.7 19.4 0.4 Run 1 14:47:02 19.9 19.4 0.4 Run 1 14:47:22 21.2 19.4 0.4 Run 1 14:47:43 22.2 19.4 0.4 Run 1 14:48:03 21.8 19.4 0.4 Run 1 14:48:23 21.6 19.4 0.4 Run 1 14:48:43 23.0 19.4 0.4 Run 1 14:49:02 22.9 19.4 0.4 Run 1 14:49:22 23.2 19.4 0.4 Run 1 14:49:42 20.6 19.4 0.4 Run 1 14:50:03 20.7 19.4 0.4 Run 1 14:50:23 22.0 19.4 0.4 Run 1 14:50:43 22.2 19.4 0.4 Run 1 14:51:03 22.3 19.4 0.4 RUN 1 - 1405-1452 14:51:22 23.4 19.4 0.4 NOx ppm 

### 0 2 % CO 2 

### % 14:51:42 23.3 19.4 0.4 22.5 19.4 0.4 14:52:02 15.5 19.4 0.4 14:52:23 2.5 19.6 0.2 14:52:43 1.6 19.8 0.2 14:53:03 1.6 20.0 0.1 14:53:23 1.6 20.1 0.1 14:53:42 1.5 20.1 0.1 14:54:02 1.4 20.1 0.1 Barr Engineering

Page 4 of 14Northshore Mining Furnace 12 Hood Exhaust 1203 Reference Method Data Logger Output

Time NOx 02 CO2 Time ppm % % 14:54:22 1.5 20.2 0.1 14:54:43 1.4 20.2 0.1 14:55:03 1.3 20.2 0,1 14:55:23 1.4 20.3 0.1 14:55:43 1.4 20.3 0.1 14:56:02 1.4 20.3 0.1 14:56:22 1.4 20.3 0.1 14:56:43 1.3 20.3 0.1 14:57:03 1.4 20.3 0.1 14:57:23 1.6 20.3 0.1 14:57:43 1.7 20.3 0.1 14:58:02 2.0 20.4 0.1 14:58:22 2.1 20.4 0.1 14:58:42 1.7 10.6 0.1 14:59:03 0.8 0.6 0.0 14:59:23 0.9 0.2 0.0 14:59:43 0.9 0.2 0.0 15:00:03 0.9 0.1 0.0 15:00:22 0.5 0.1 0.0 15:00:42 0.6 0.1 0.0 15:01:02 0.6 0.1 0.0 15:01:23 0.6 0.1 0.0 15:01:43 0.6 2.9 1.1 15:02:03 0.5 16.7 2.9 15:02:23 0.6 17.5 2.9 15:02:42 0.6 17.6 3.0 15:03:02 0.6 17.6 3.0 15:03:22 0.6 17.7 3.0 15:03:43 0.6 17.7 3.0 15:04:03 38.8 12.7 1.6 15:04:23 42.1 0.7 0.1 15:04:43 44.0 0.2 0.1 15:05:02 44.1 0.2 0.1 15:05:22 44.2 0.1 0.1 15:05:43 27.2 0.1 0.0 15:06:03 1.2 0.1 0.0 15:06:23 1.0 0.1 0.0 15:06:43 11.7 10.2 0.2 15:07:02 13.8 19.6 0.3 15:07:22 13.8 19.7 0.3 15:07:42 14.2 19.8 0.3 15:08:03 18.5 19.7 0.3 15:08:23 19.9 19.6 0.3 15:08:43 19.9 19.6 0.3 15:09:03 20.0 19.6 0.4 15:09:22 20.0 19.6 0.4 15:09:42 20.2 19.6 0.4 15:10:02 19.3 19.6 0.4 15:10:23 19.2 19.6 0.3 15:10:43 18.4 19.6 0.3 15:11:03 18.8 19.6 0.3 15:11:23 19.8 19.6 0.4 15:11:42 19.5 19.6 0.4 Barr Engineering

Page 5 of 14Furnace 12 Hood Exhaust 1203 Barr Engineering Reference Method Data Logger Output Northshore Mining

02 CO2

19.6 0.4 19.6 0.3 19.6 0.3 19.6 0.3 19.6 0.3 19.6 0.3 19.6 0.3 19.6 0.3 19.6 0.3 19.6 0.3 19.6 0.3 19.6 0.3 19.6 0.3 19.6 0.4 19.5 0.4 19.5 0.4 19.5 0.4 19.5 0.4 19.5 0.4 19.5 0.4 19.5 0.4 19.5 0.4 19.4 0.4 19.4 0.4 19.4 0.4 Run 2 19.4 0.4 Run 2 19.3 0.4 Run 2 19.3 0.4 Run 2 19.3 0.4 Run 2 19.3 0.4 Run 2 19.3 0.4 Run 2 19.3 0.4 Run 2 19.3 0.4 Run 2 19.3 0.4 Run 2 19.3 0.4 Run 2 19.3 0.4 Run 2 19.3 0.4 Run 2 19.3 0.4 Run 2 19.3 0.4 Run 2 19.3 0.4 Run 2 19.2 0.4 Run 2 19.2 0.4 Run 2 19.2 0.4 Run 2 19.2 0.4 Run 2 19.3 0.4 Run 2 19.2 0.4 Run 2 19.3 0.4 Run 2 19.3 0.4 Run 2 19.3 0.4 Run 2 19.3 0.4 Run 2 19.4 0.4 Run 2 19.4 0.4 Run 2 19.4 0.4 Run 2 Time NOx Time ppm 15:12:02 18.5 15:12:22 17.7 15:12:43 18.9 15:13:03 18.0 15:13:23 19.3 15:13:43 17.0 15:14:02 18.0 15:14:22 18.0 15:14:42 17.8 15:15:03 16.9 15:15:23 18.1 15:15:43 17.8 15:16:02 19.2 15:16:22 21.0 15:16:42 20.2 15:17:03 20.4 15:17:23 20.0 15:17:43 21.2 15:18:03 20.4 15:18:22 19.9 15:18:42 20.5 15:19:02 21.3 15:19:23 22.0 15:19:43 22.7 15:20:03 23.8 15:20:23 24.5 15:20:42 23.6 15:21:02 24.2 15:21:22 24.4 15:21:43 23.2 15:22:03 25.4 15:22:23 25.0 15:22:43 24.1 15:23:02 26.9 15:23:22 25.6 15:23:42 26.5 15:24:03 25.0 15:24:23 25.7 15:24:43 24.9 15:25:02 26.0 15:25:22 27.2 15:25:42 26.2 15:26:03 25.6 15:26:23 24.2 15:26:43 25.7 15:27:03 25.4 15:27:22 25.6 15:27:42 24.4 15:28:02 25.2 15:28:23 26.7 15:28:43 25.5 15:29:03 26.0 15:29:23 26.4 Page 6 of 14Northshore Mining

Time Time NOx PPm Furnace 12 Hood Exhaust 1203 Reference Method Data Logger Output

02 CO2 % cyo 15:29:42 26.0 19.4 0.4 Run 2 15:30:02 26.1 19.4 0.4 Run 2 15:30:22 25.6 19.4 0.4 Run 2 15:30:43 24.8 19.4 0.4 Run 2 15:31:03 23.7 19.4 0.4 Run 2 15:31:23 23.0 19.4 0.4 Run 2 15:31:43 21.8 19.4 0.4 Run 2 15:32:02 23.5 19.4 0.4 Run 2 15:32:22 24.0 19.4 0.4 Run 2 15:32:42 23.5 19.4 0.4 Run 2 15:33:03 22.3 19.4 0.4 Run 2 15:33:23 23.1 19.4 0.4 Run 2 15:33:43 22.1 19.4 0.4 Run 2 15:34:02 23.5 19.4 0.4 Run 2 15:34:22 23.2 19.3 0.4 Run 2 15:34:42 22.7 19.3 0.4 Run 2 15:35:03 23.2 19.3 0.4 Run 2 15:35:23 23.5 19.3 0.4 Run 2 15:35:43 23.1 19.3 0.4 Run 2 15:36:03 21.0 19.3 0.4 Run 2 15:36:22 21.6 19.4 0.4 Run 2 15:36:42 22.8 19.3 0.4 Run 2 15:37:02 23.6 19.3 0.4 Run 2 15:37:23 22.7 19.3 0.4 Run 2 15:37:43 22.2 19.3 0.4 Run 2 15:38:03 24.9 19.3 0.4 Run 2 15:38:23 24.3 19.3 0.4 Run 2 15:38:42 23.0 19.3 0.4 Run 2 15:39:02 24.1 19.3 0.4 Run 2 15:39:22 24.9 19.3 0.4 Run 2 15:39:43 24.1 19.3 0.4 Run 2 15:40:03 24.5 19.3 0.4 Run 2 15:40:23 26.4 19.3 0.4 Run 2 15:40:43 24.7 19.3 0.4 Run 2 15:41:02 24.9 19.4 0.4 Run 2 15:41:22 23.8 19.4 0.4 Run 2 15:41:42 23.6 19.4 0.4 Run 2 15:42:03 22.7 19.4 0.4 Run 2 15:42:23 23.2 19.4 0.4 Run 2 15:42:43 23.1 19.4 0.4 Run 2 15:43:02 22.0 19.4 0.4 Run 2 15:43:22 22.0 19.4 0.4 Run 2 15:43:42 21.6 19.4 0.4 Run 2 15:44:03 21.4 19.4 0.4 Run 2 15:44:23 21.5 19.4 0.4 Run 2 15:44:43 21.9 19.4 0.4 Run 2 15:45:03 22.6 19.4 0.4 Run 2 15:45:22 22.8 19.4 0.4 Run 2 15:45:42 22.4 19.4 0.4 Run 2 15:46:02 22.8 19.4 0.4 Run 2 15:46:23 22.9 19.4 0.4 Run 2 15:46:43 21.4 19.4 0.4 Run 2 15:47:03 23.0 19.4 0.4 Run 2 Barr Engineering

Page 7 of 14Northshore Mining

Time Time NOx PPm Furnace 12 Hood Exhaust 1203 Reference Method Data Logger Output

02 CO2 % % 15:47:23 22.7 19.4 0.4 Run 2 15:47:42 20.8 19.4 0.4 Run 2 15:48:02 22.1 19.4 0.4 Run 2 15:48:22 22.0 19.4 0.4 Run 2 15:48:43 21.6 19.4 0.4 Run 2 15:49:03 22.3 19.4 0.4 Run 2 15:49:23 21.4 19.4 0.4 Run 2 15:49:43 21.3 19.4 0.4 Run 2 15:50:02 22.2 19.4 0.4 Run 2 15:50:22 21.0 19.4 0.4 Run 2 15:50:42 21.2 19.4 0.4 Run 2 15:51:03 20.9 19.4 0.4 Run 2 15:51:23 21.6 19.4 0.4 Run 2 15:51:43 20.6 19.4 0.4 Run 2 15:52:02 23.4 19.4 0.4 Run 2 15:52:22 23.4 19.4 0.4 Run 2 15:52:42 22.9 19.4 0.4 Run 2 15:53:03 22.5 19.4 0.4 Run 2 15:53:23 21.4 19.4 0.4 Run 2 15:53:43 21.1 19.4 0.4 Run 2 15:54:03 21.2 19.4 0.4 Run 2 15:54:22 21.6 19.4 0.4 Run 2 15:54:42 22.4 19.4 0.4 Run 2 15:55:02 22.9 19.4 0.4 Run 2 15:55:23 22.1 19.4 0.4 Run 2 15:55:43 21.8 19.4 0.4 Run 2 15:56:03 22.4 19,4 0.4 Run 2 15:56:23 21.5 19.4 0.4 Run 2 15:56:42 22.4 19.4 0.4 Run 2 15:57:02 21.6 19.4 0.4 Run 2 15:57:22 22.2 19.4 0.4 Run 2 15:57:43 23.3 19.4 0.4 Run 2 15:58:03 22.4 19.4 0.4 Run 2 15:58:23 23.1 19.4 0.4 Run 2 15:58:43 24.3 19.4 0.4 Run 2 15:59:02 24.3 19.4 0.4 Run 2 15:59:22 23.7 19.4 0.4 Run 2 15:59:42 24.4 19.4 0.4 Run 2 16:00:03 23.4 19.4 0.4 Run 2 16:00:23 22.1 19.4 0.4 Run 2 16:00:43 23.1 19.4 0.4 Run 2 16:01:02 23.7 19.4 0.4 Run 2 16:01:22 24.4 19.4 0.4 Run 2 16:01:42 24.5 19.4 0.4 Run 2 16:02:03 22.8 19.4 0.4 Run 2 16:02:23 21.0 19.4 0.4 Run 2 16:02:43 22.7 19.4 0.4 Run 2 16:03:03 24.1 19.4 0.4 Run 2 16:03:22 22.5 19.4 0.4 Run 2 16:03:42 22.4 19.4 0.4 Run 2 16:04:02 21.5 19.4 0.4 Run 2 16:04:23 21.7 19.4 0.4 Run 2 16:04:43 22.5 19.4 0.4 Run 2 Barr Engineering

Page 8 of 14Northshore Mining

Time Time NOx PPm Furnace 12 Hood Exhaust 1203 Reference Method Data Logger Output

02 CO2 % % 16:05:03 22.9 19.4 0.4 Run 2 16:05:23 23.3 19.4 0.4 Run 2 16:05:42 22.4 19.4 0.4 Run 2 16:06:02 21.9 19.4 0.4 Run 2 16:06:22 24.0 19.4 0.4 Run 2 16:06:43 23.5 19.4 0.4 Run 2 16:07:03 21.4 19.4 0.4 Run 2 16:07:23 22.5 19.4 0.4 Run 2 16:07:43 22.5 19.4 0.4 Run 2 16:08:02 21.2 19.4 0.4 Run 2 16:08:22 22.0 19.4 0.4 Run 2 16:08:42 22.8 19.4 0.4 Run 2 16:09:03 22.5 19.4 0.4 Run 2 16:09:23 23.1 19.4 0.4 Run 2 16:09:43 23.2 19.4 0.4 Run 2 16:10:02 23.6 19.3 0.4 Run 2 16:10:22 23.6 19.3 0.4 Run 2 16:10:42 23.6 19.4 0.4 Run 2 16:11:03 23.9 19.4 0.4 Run 2 16:11:23 23.3 19.4 0.4 Run 2 16:11:43 23.5 19.4 0.4 Run 2 16:12:03 24.5 19.4 0.4 Run 2 16:12:22 24.1 19.4 0.4 Run 2 16:12:42 24.1 19.4 0.4 Run 2 16:13:02 24.4 19.4 0.4 Run 2 16:13:23 24.5 19.4 0.4 Run 2 16:13:43 21.6 19.4 0.4 Run 2 16:14:03 20.7 19.4 0.4 Run 2 16:14:23 23.0 19.4 0.4 Run 2 16:14:42 23.0 19.4 0.4 Run 2 16:15:02 22.9 19.4 0.4 Run 2 16:15:22 21.8 19.4 0.4 Run 2 16:15:43 22.4 19.4 0.4 Run 2 16:16:03 23.0 19.4 0.4 Run 2 16:16:23 23.5 19.4 0.4 Run 2 16:16:43 22.8 19.4 0.4 Run 2 16:17:02 20.1 19.4 0.4 Run 2 16:17:22 21.2 19.5 0.4 Run 2 16:17:42 21.4 19.5 0.4 Run 2 16:18:03 22.2 19.4 0.4 Run 2 16:18:23 23.6 19.4 0.4 Run 2 16:18:43 22.9 19.4 0.4 Run 2 16:19:02 24.0 19.4 0.4 RUN 2- 1520-1620 16:19:22 21.1 19.4 0.4 NOx ppm 0 2 

### % C 2 % 16:19:42 23.3 19.4 0.4 23.2 19.4 0.4 16:20:02 23.4 19.4 0.4 16:20:23 21.6 19.4 0.4 16:20:43 5.8 19.0 0.4 16:21:03 40.9 4.2 0.1 16:21:22 44.2 0.3 0.0 16:21:42 44.3 0.2 0.0 16:22:02 44.4 0.2 0.0 Barr Engineering

Page 9 of 14Northshore Mining Furnace 12 Hood Exhaust 1203 Reference Method Data Logger Output

Time NOx 02 CO2 Time ppm % % 16:22:23 38.1 0.1 0.0 16:22:43 1.4 10.5 2.4 16:23:03 1.1 17.4 2.9 16:23:23 1.0 17.5 2.9 16:23:42 0.9 17.6 3.0 16:24:02 0.8 17.6 3.0 16:24:22 0.8 17.6 3.0 16:24:43 0.9 17.6 2.9 16:25:03 0.8 5.8 0.4

Time NOx 02 CO2 Time ppm 16:26:26 23.1 19.3 0.4 16:26:46 21.0 19.4 0.4 16:27:05 23.5 19.4 0.4 16:27:25 21.5 19.4 0.4 16:27:45 22.4 19.4 0.4 16:28:06 23.3 19.4 0.4 16:28:26 23.7 19.4 0.4 16:28:46 23.1 19.4 0.4 16:29:06 23.6 19.4 0.4 16:29:25 23.5 19.4 0.4 16:29:45 23.5 19.4 0.4 16:30:05 24.5 19.4 0.4 16:30:26 24.9 19.3 0.4 16:30:46 23.6 19.3 0.4 16:31:06 22.9 19.4 0.4 16:31:26 25.1 19.4 0.4 16:31:45 23.3 19.3 0.4 16:32:05 23.6 19.4 0.4 16:32:25 23.8 19.4 0.4 16:32:46 23.7 19.4 0.4 16:33:06 24.3 19.4 0.4 16:33:26 24.5 19.4 0.4 16:33:46 23.7 19.4 0.4 16:34:05 23.0 19.4 0.4 16:34:25 24.1 19.4 0.4 16:34:45 23.2 19.4 0.4 16:35:06 21.9 19.4 0.4 Run 3 16:35:26 22.5 19.5 0.4 Run 3 16:35:46 22.6 19.4 0.4 Run 3 16:36:05 23.2 19.4 0.4 Run 3 16:36:25 22.3 19.4 0.4 Run 3 16:36:45 23.4 19.4 0.4 Run 3 16:37:06 22.3 19.4 0.4 Run 3 16:37:26 22.3 19.4 0.4 Run 3 16:37:46 21.7 19.4 0.4 Run 3 16:38:06 22.1 19.4 0.4 Run 3 16:38:25 20.6 19.4 0.4 Run 3 16:38:45 21.3 19.4 0.4 Run 3 16:39:05 20.3 19.5 0.4 Run 3 16:39:26 19.6 19.5 0.4 Run 3 16:39:46 22.4 19.4 0.4 Run 3 Barr Engineering

Page 10 of 14Barr Engineering Northshore Mining

Time Time NOx PPm Furnace 12 Hood Exhaust 1203 Reference Method Data Logger Output

02 CO2 % % 16:40:06 21.5 19.4 0.4 Run 3 16:40:26 19.7 19.4 0.4 Run 3 16:40:45 20.9 19.5 0.4 Run 3 16:41:05 21.5 19.4 0.4 Run 3 16:41:25 22.2 19.4 0.4 Run 3 16:41:46 20.5 19.4 0.4 Run 3 16:42:06 21.8 19.4 0.4 Run 3 16:42:26 22.1 19.4 0.4 Run 3 16:42:46 21.5 19.4 0.4 Run 3 16:43:05 23.2 19.4 0.4 Run 3 16:43:25 22.9 19.4 0.4 Run 3 16:43:45 23.8 19.4 0.4 Run 3 16:44:06 24.3 19.4 0.4 Run 3 16:44:26 23.2 19.4 0.4 Run 3 16:44:46 24.1 19.4 0.4 Run 3 16:45:05 23.8 19.4 0.4 Run 3 16:45:25 23.4 19.4 0.4 Run 3 16:45:45 23.5 19.4 0.4 Run 3 16:46:06 22.2 19.4 0.4 Run 3 16:46:26 23.0 19.4 0.4 Run 3 16:46:46 23.1 19.4 0.4 Run 3 16:47:06 23.2 19.4 0.4 Run 3 16:47:25 23.9 19.4 0.4 Run 3 16:47:45 23.7 19.4 0.4 Run 3 16:48:05 25.2 19.4 0.4 Run 3 16:48:26 24.1 19.4 0.4 Run 3 16:48:46 24.0 19.4 0.4 Run 3 16:49:06 21.5 19.4 0.4 Run 3 16:49:26 23.5 19.5 0.4 Run 3 16:49:45 23.4 19.4 0.4 Run 3 16:50:05 20.9 19.4 0.4 Run 3 16:50:25 20.3 19.5 0.4 Run 3 16:50:46 22.1 19.5 0.4 Run 3 16:51:06 20.3 19.5 0.4 Run 3 16:51:26 20.3 19.5 0.4 Run 3 16:51:46 21.8 19.5 0.4 Run 3 16:52:05 20.6 19.5 0.4 Run 3 16:52:25 20.2 19.5 0.4 Run 3 16:52:45 20.4 19.5 0.4 Run 3 16:53:06 20.7 19.5 0.4 Run 3 16:53:26 21.6 19.5 0.4 Run 3 16:53:46 22.0 19.4 0.4 Run 3 16:54:05 22.0 19.4 0.4 Run 3 16:54:25 22.6 19.4 0.4 Run 3 16:54:45 20.3 19.4 0.4 Run 3 16:55:06 22.0 19.4 0.4 Run 3 16:55:26 22.6 19.4 0.4 Run 3 16:55:46 23.0 19.4 0.4 Run 3 16:56:06 23.7 19.4 0.4 Run 3 16:56:25 23.9 19.4 0.4 Run 3 16:56:45 24.2 19.4 0.4 Run 3 16:57:05 24.6 19.3 0.4 Run 3 16:57:26 26.6 19.3 0.4 Run 3 Page 11 of 14Northshore Mining

Time Time NOx PPm Furnace 12 Hood Exhaust 1203 Reference Method Data Logger Output

02 CO2 o k 0 /0 16:57:46 25.7 19.3 0.4 Run 3 16:58:06 24.1 19.3 0.4 Run 3 16:58:26 26.2 19.3 0.4 Run 3 16:58:45 25.7 19.3 0.4 Run 3 16:59:05 25.0 19.3 0.4 Run 3 16:59:25 23.2 19.4 0.4 Run 3 16:59:46 23.6 19.4 0.4 Run 3 17:00:06 23.5 19.4 0.4 Run 3 17:00:26 23.9 19.4 0.4 Run 3 17:00:46 24.3 19.4 0.4 Run 3 17:01:05 24.0 19.4 0.4 Run 3 17:01:25 23.4 19.4 0.4 Run 3 17:01:45 22.9 19.4 0.4 Run 3 17:02:06 22.0 19.4 0.4 Run 3 17:02:26 21.0 19.5 0.4 Run 3 17:02:46 21.9 19.5 0.4 Run 3 17:03:05 21.8 19.5 0.4 Run 3 17:03:25 22.0 19.5 0.4 Run 3 17:03:45 22.5 19.5 0.4 Run 3 17:04:06 22.3 19.5 0.4 Run 3 17:04:26 21.0 19.5 0.4 Run 3 17:04:46 20.6 19.5 0.4 Run 3 17:05:06 22.4 19.5 0.4 Run 3 17:05:25 21.7 19.5 0.4 Run 3 17:05:45 21.3 19.4 0.4 Run 3 17:06:05 21.0 19.5 0.4 Run 3 17:06:26 23.1 19.4 0.4 Run 3 17:06:46 21.1 19.4 0.4 Run 3 17:07:06 22.3 19.4 0.4 Run 3 17:07:26 23.9 19.4 0.4 Run 3 17:07:45 23.4 19.4 0.4 Run 3 17:08:05 23.6 19.4 0.4 Run 3 17:08:25 25.0 19.3 0.4 Run 3 17:08:46 23.7 19.3 0.4 Run 3 17:09:06 24.1 19.3 0.4 Run 3 17:09:26 25.0 19.3 0.4 Run 3 17:09:46 23.8 19.3 0.4 Run 3 17:10:05 23.0 19.3 0.4 Run 3 17:10:25 24.0 19.3 0.4 Run 3 17:10:45 23.3 19.3 0.4 Run 3 17:11:06 23.8 19.3 0.4 Run 3 17:11:26 23.0 19.3 0.4 Run 3 17:11:46 23.0 19.3 0.4 Run 3 17:12:05 23.8 19.3 0.4 Run 3 17:12:25 23.0 19.4 0.4 Run 3 17:12:45 23.2 19.4 0.4 Run 3 17:13:05 24.4 19.4 0.4 Run 3 17:13:26 24.3 19.4 0.4 Run 3 17:13:46 24.4 19.4 0.4 Run 3 17:14:06 23.3 19.4 0.4 Run 3 17:14:25 23.3 19.4 0.4 Run 3 17:14:45 22.3 19.4 0.4 Run 3 17:15:05 21.6 19.4 0.4 Run 3 Barr Engineering

Page 12 of 14Northshore Mining

Time Time NOx PPm Furnace 12 Hood Exhaust 1203 Reference Method Data Logger Output

02 CO2 % % 17:15:26 23.0 19.4 0:4 Run 3 17:15:46 22.1 19.4 0.4 Run 3 17:16:06 21.0 19.5 0.4 Run 3 17:16:26 20.4 19.5 0.4 Run 3 17:16:45 21.1 19.5 0.4 Run 3 17:17:05 21.4 19.5 0.4 Run 3 17:17:25 20.0 19.5 0.4 Run 3 17:17:46 20.2 19.5 0.4 Run 3 17:18:06 21.0 19.5 0.4 Run 3 17:18:26 19.5 19.4 0.4 Run 3 17:18:46 21.0 19.5 0.4 Run 3 17:19:05 21.0 19.4 0.4 Run 3 17:19:25 19.7 19.4 0.4 Run 3 17:19:45 22.2 19.4 0.4 Run 3 17:20:06 22.3 19.4 0.4 Run 3 17:20:26 21.1 19.4 0.4 Run 3 17:20:46 22.9 19.4 0.4 Run 3 17:21:05 22.5 19.4 0.4 Run 3 17:21:25 22.4 19.4 0.4 Run 3 17:21:45 22.0 19.4 0.4 Run 3 17:22:05 23.0 19.4 0.4 Run 3 17:22:26 23.3 19.3 0.4 Run 3 17:22:46 23.6 19.3 0.4 Run 3 17:23:06 23.2 19.3 0.4 Run 3 17:23:25 24.5 19.3 0.4 Run 3 17:23:45 23.9 19.3 0.4 Run 3 17:24:05 23.2 19.3 0.4 Run 3 17:24:26 23.2 19.3 0.4 Run 3 17:24:46 23.7 19.3 0.4 Run 3 17:25:06 24.5 19.3 0.4 Run 3 17:25:26 22.7 19.3 0.4 Run 3 17:25:45 23.6 19.3 0.4 Run 3 17:26:05 24.5 19.3 0.4 Run 3 17:26:25 23.9 19.3 0.4 Run 3 17:26:46 24.6 19.3 0.4 Run 3 17:27:06 24.8 19.3 0.4 Run 3 17:27:26 24.8 19.4 0.4 Run 3 17:27:46 24.2 19.4 0.4 Run 3 17:28:05 23.7 19.4 0.4 Run 3 17:28:25 23.3 19.4 0.4 Run 3 17:28:45 23.6 19.4 0.4 Run 3 17:29:06 24.5 19.4 0.4 Run 3 17:29:26 24.1 19.4 0.4 Run 3 17:29:46 22.1 19.4 0.4 Run 3 17:30:05 21.3 19.5 0.4 Run 3 17:30:25 22.0 19.4 0.4 Run 3 17:30:45 23.2 19.4 0.4 Run 3 17:31:05 21.1 19.4 0.4 Run 3 17:31:26 21.7 19.4 0.4 Run 3 17:31:46 20.4 19.5 0.4 Run 3 17:32:06 21.7 19.4 0.4 Run 3 17:32:25 22.2 19.4 0.4 Run 3 17:32:45 23.4 19.4 0.4 Run 3 Barr Engineering

Page 13 of 14Northshore Mining

Time Time 17:33:05 17:33:26 17:33:46 17:34:06 17:34:26 17:34:45 NOx ppm 24.1 22.2 23.7 23.9 23.9 24.1 Furnace 12 Hood Exhaust Reference Method Data

02 CO2 % % 19.4 0.4 19.4 0.4 19.4 0.4 19.4 0.4 19.4 0.4 19.4 0.4 1203 Logger Output

Run 3 Run 3 Run 3 RUN 3- 1635-1735 NOx ppm 0 2 % CO 2 

### % 22.7 19.4 0.4 17:35:05 23.3 19.4 0.4 17:35:25 23.8 19.4 0.4 17:35:46 22.2 19.4 0.4 17:36:06 23.6 19.4 0.4 17:36:26 24.0 19.4 0.4 17:36:46 3.1 18.1 0.3 17:37:05 1.1 2.7 0.1 17:37:25 0.9 0.3 0.0 17:37:45 0.9 0.2 0.0 17:38:06 0.6 0.2 0.0 17:38:26 0.8 0.1 0.0 17:38:46 0.8 0.1 0.0 17:39:05 21.8 0.1 0.0 17:39:25 43.5 0.2 0.0 17:39:45 44.1 0.1 0.0 17:40:05 44.2 0.1 0.0 17:40:26 44.2 0.1 0.0 17:40:46 29.1 0.1 0.1 17:41:06 2.0 12.0 2.7 17:41:25 1.4 17.5 2.9 17:41:45 1.4 17.6 3.0 17:42:05 1.2 17.6 3.0 17:42:26 1.3 17.6 3.0 17:42:46 1.3 17.6 3.0 17:43:06 1.3 17.5 2.8 17:43:26 1.3 4.3 0.3 17:43:45 1.3 0.3 0.1 17:44:05 1.3 11.8 0.1 17:44:25 1.3 20.3 0.1 17:44:46 1.2 20.4 0.1 17:45:06 1.2 20.5 0.1 17:45:26 1.2 20.5 0.1 17:45:46 1.2 20.5 0.1 17:46:05 1.2 20.5 0.1 17:46:25 1.2 20.5 0.1 17:46:45 1.1 20.5 0.1 17:47:06 1.3 20.5 0.1 17:47:26 1.2 20.5 0.1 17:47:46 1.2 20.5 0.1 17:48:05 1.3 20.5 0.1 17:48:25 0.5 20.5 0.1 Barr Engineering

Page 14 of 14Northshore Mining Furnace 6 Hood Exh/Waste Gas Stack 602 Barr Engineering Reference Method Data Logger Output
North Shore Mining Silver Bay, Minnesota The time is 11:08:55.48. The date is 12-21-2000. Time NOx 02 CO2 Time ppm % % 11:09:15 4.7 0.0 0.1 11:09:36 4.7 -0.4 0.2 11:09:56 4.6 0.6 0.3 11:10:16 4.6 1.2 0.3 11:10:36 12.1 1.2 0.3 11:10:55 10.5 1.3 0.3 11:11:15 10.6 1.3 0.3 11:11:36 10.6 1.3 0.3 11:11:56 10.5 1.2 0.3 11:12:16 10.6 1.0 0.3 11:12:36 -0.1 0.1 0.1 11:12:56 0.2 0.1 0.0 11:13:15 0.1 0.0 0.0 11:13:35 0.1 0.1 0.0 11:13:56 0.1 0.1 0.0 11:14:16 0.1 0.0 0.0 11:14:36 0.2 0.0 0.0 11:14:56 0.3 0.0 0.1 11:15:16 0.2 0.0 0.0 11:15:35 0.2 0.0 0.0 11:15:55 0.1 0.0 0.0 11:16:16 0.1 0.0 0.0 11:16:36 0.2 0.0 0.0 11:16:56 0.2 0.0 0.0 11:17:16 0.2 0.0 0.0 11:17:36 0.2 0.0 0.0 11:17:55 0.2 0.0 0.0 11:18:15 0.3 9.2 2.6 11:18:36 0.2 17.5 3.2 11:18:56 0.3 17.9 3.0 11:19:16 0.3 18.0 3.0 11:19:36 0.3 18.1 3.0 11:19:55 0.2 15.0 7.0 11:20:15 0.3 10.3 9.8 11:20:36 0.2 10.2 10.0 11:20:56 51.3 10.1 9.0 11:21:16 102.1 2.6 0.1 11:21:36 96.2 0.2 0.1 11:21:56 96.1 0.1 0.1 11:22:15 96.5 0.1 0.0 11:22:35 96.0 0.1 0.0 11:22:56 43.4 0.0 0.0 11:23:16 44.3 0.0 0.0 11:23:36 44.5 0.0 0.0 11:23:56 0.5 0.0 0.0 11:24:16 1.3 3.4 0.1 11:24:35 0.9 20.2 0.1 11:24:55 0.8 21.0 0.1 11:25:16 0.6 21.1 0.1 Page 1 of 16Furnace 6 Hood Exh/Waste Gas Stack 602 Barr Engineering Reference Method Data Logger Output Northshore Mining

Time PPm 11:09:15 4.7 11:25:36 0.6 11:25:56 0.5 11:26:16 0.5 11:26:36 0.4 11:26:55 0.4 11:27:15 0.3 11:27:36 0.4 11:27:56 0.2 11:28:16 0.4 11:28:36 36.7 11:28:55 42.7 11:29:15 43.1 11:29:36 43.6 11:29:56 43.7 11:30:16 43.6 11:30:36 43.6 11:30:56 43.6 11:31:15 6.9 11:31:35 1.1 11:31:56 0.7 11:32:16 0.6 11:32:36 0.5 11:32:56 0.5 11:33:16 0.6 11:33:35 0.5 11:33:55 0.7 11:34:16 0.4 11:34:36 0.4 11:34:56 0.5 11:35:16 0.4 11:35:36 26.8 11:35:55 28.7 11:36:15 28.6 11:36:36 28.8 11:36:56 28.5 11:37:16 28.7 11:37:36 28.8 11:37:55 28.6 11:38:15 29.2 11:38:36 28.6 11:38:56 28.6 11:39:16 28.2 11:39:36 29.1 11:39:56 28.9 11:40:15 28.5 11:40:35 28.5 11:40:56 28.6 11:41:16 28.1 11:41:36 28.3 11:41:56 28.1 11:42:16 28.5 11:42:35 28.3 11:42:55 28.4 o k ok 0.0 0.1 20.8 0.1 7.6 0.1 1.0 0.0 0.3 0.0 0.2 0.0 0.2 0.0 0.2 0.0 0.1 0.0 0.1 0.0 0.1 0.0 0.1 0.0 0.1 0.0 0.1 0.0 0.1 0.0 0.1 0.0 0.1 0.0 0.1 0.0 2.4 1.0 15.7 2.8 17.8 3.0 18.0 3.0 18.0 3.0 18.0 3.0 18.0 3.0 17.9 2.9 7.0 0.7 0.7 0.1 0.2 0.1 0.2 0.1 0.2 0.1 5.4 0.6 17.2 1.0 18.6 1.0 18.7 1.0 18.7 1.0 18.7 1.0 18.7 1.0 18.7 1.0 18.7 1.1 18.7 1.0 18.7 1.0 18.7 1.0 18.7 1.1 18.7 1.1 18.7 1.1 18.7 1.1 18.7 1.1 18.7 1.1 18.7 1.1 18.7 1.0 18.7 1.1 18.7 1.0 18.7 1.1 Run 1 Run 1 Run 1 Run 1 Run 1 Run 1 Run 1 Run 1 Run 1 Page 2 of 16Barr Engineering Northshore Mining

Time Furnace 6 Hood Exh/Waste Gas Stack 602 Reference Method Data Logger Output

PPm % % 11:09:15 4.7 0.0 0.1 11:43:16 27.9 18.7 1.1 Run 1 11:43:36 27.7 18.6 1.1 Run 1 11:43:56 27.7 18.6 1.1 Run 1 11:44:16 27.7 18.6 1.1 Run 1 11:44:36 27.9 18.6 1.0 Run 1 11:44:55 27.5 18.6 1.0 Run 1 11:45:15 27.3 18.6 1.0 Run 1 11:45:36 27.6 18.6 1.0 Run 1 11:45:56 27.6 18.6 1.0 Run 1 11:46:16 27.5 18.6 1.0 Run 1 11:46:36 28.2 18.6 1.0 Run 1 11:46:55 28.0 18.6 1.0 Run 1 11:47:15 28.0 18.6 1.0 Run 1 11:47:36 28.3 18.6 1.0 Run 1 11:47:56 28.4 18.6 1.0 Run 1 11:48:16 28.8 18.6 1.0 Run 1 11:48:36 29.1 18.6 1.1 Run 1 11:48:56 29.4 18.6 1.1 Run 1 11:49:15 29.1 18.6 1.0 Run 1 11:49:35 29.7 18.6 1.1 Run 1 11:49:56 30.2 18.5 1.1 Run 1 11 :50:16 30.2 18.5 1.1 Run 1 11:50:36 30.0 18.5 1.1 Run 1 11:50:56 30.0 18.5 1.1 Run 1 11:51:16 30.4 18.5 1.1 Run 1 1 1 :51 :35 30.2 18.5 1.1 Run 1 1 1 :51 :55 30.3 18.5 1.1 Run 1 11:52:16 30.0 18.5 1.1 Run 1 11:52:36 30.4 18.5 1.1 Run 1 11:52:56 29.9 18.5 1.1 Run 1 11:53:16 30.3 18.5 1.1 Run 1 11:53:36 30.4 18.6 1.1 Run 1 11:53:55 30.2 18.6 1.1 Run 1 11:54:15 30.0 18.6 1.1 Run 1 11:54:36 30.0 18.6 1.1 Run 1 11:54:56 29.4 18.6 1.1 Run 1 11:55:16 30.0 18.6 1.1 Run 1 11:55:36 29.7 18.6 1.1 Run 1 11:55:55 29.4 18.6 1.1 Run 1 11:56:15 29.4 18.6 1.1 Run 1 11:56:36 29.1 18.6 1.0 Run 1 11:56:56 29.5 18.6 1.0 Run 1 11:57:16 29.1 18.6 1.0 Run 1 11:57:36 29.8 18.7 1.0 Run 1 11:57:56 29.6 18.6 1.0 Run 1 11:58:15 29.6 18.6 1.0 Run 1 1 1 :58:35 29.9 18.6 1.0 Run 1 11:58:56 29.6 18.6 1.0 Run 1 11:59:16 29.8 18.6 1.0 Run 1 11:59:36 30.1 18.6 1.0 Run 1 11:59:56 29.7 18.6 1.0 Run 1 12:00:16 29.8 18.6 1.0 Run 1 12:00:35 29.7 18.6 1.0 Run 1 Page 3 of 16Furnace 6 Hood Exh/Waste Gas Stack 602 Reference Method Data Logger Output Barr Engineering Northshore Mining

Time PPm % % 11:09:15 4.7 0.0 0.1 12:00:55 29.3 18.6 1.0 Run 1 12:01:16 29.9 18.6 1.0 Run 1 12:01:36 29.9 18.6 1.0 Run 1 12:01:56 30.1 18.6 1.0 Run 1 12:02:16 29.8 18.6 1.0 Run 1 12:02:36 30.1 18.6 1.0 Run 1 12:02:55 30.2 18.6 1.0 Run 1 12:03:15 30.2 18.6 1.0 Run 1 12:03:36 30.4 18.6 1.0 Run 1 12:03:56 30.4 18.6 1.0 Run 1 12:04:16 30.1 18.6 1.0 Run 1 12:04:36 30.6 18.6 1.0 Run 1 12:04:55 30.6 18.6 1.0 Run 1 12:05:15 30.5 18.6 1.0 Run 1 12:05:36 30.5 18.6 1.0 Run 1 12:05:56 30.1 18.6 1.0 Run 1 12:06:16 30.0 18.6 1.0 Run 1 12:06:36 29.8 18.6 1.0 Run 1 12:06:56 29.7 18.6 1.0 Run 1 12:07:15 29.5 18.6 1.0 Run 1 12:07:35 29.6 18.6 1.0 Run 1 12:07:56 29.7 18.6 1.0 Flun 1 12:08:16 30.1 18.6 1.0 Run 1 12:08:36 30.2 18.6 1.0 Run 1 12:08:56 30.3 18.6 1.0 Run 1 12:09:16 30.3 18.6 1.0 Run 1 12:09:35 30.4 18.6 1.0 Run 1 12:09:55 30.4 18.6 1.0 Run 1 12:10:16 30.1 18.6 1.0 12:10:36 19.6 18.7 0.9 12:10:56 14.1 18.9 0.8 12:11:16 5.2 19.2 0.5 12:11:36 3.4 19.7 0.3 12:11:55 3.0 19.9 0.2 12:12:15 3.0 20.0 0.2 12:12:36 3.0 20.0 0.2 12:12:56 2.8 20.0 0.2 12:13:16 2.9 20.1 0.2 12:13:36 2.7 20.1 0.2 12:13:55 2.6 20.1 0.2 12:14:15 2.5 20.1 0.2 12:14:35 2.5 20.2 0.2 12:14:56 2.4 20.2 0.2 12:15:16 2.4 20.2 0.2 12:15:36 2.2 20.3 0.2 12:15:56 2.2 20.3 0.2 12:16:15 2.2 20.3 0.2 12:16:35 2.2 20.4 0.2 12:16:56 2.0 20.4 0.2 12:17:16 2.0 20.4 0.2 12:17:36 1.9 20.4 0.1 12:17:56 1.9 20.4 0.1 12:18:16 1.8 20.5 0.1 Page 4 of 16Northshore Mining Furnace 6 Hood Exh/Waste Gas Stack 602 Barr Engineering Reference Method Data Logger Output

Time ppm 11:09:15 4.7 0.0 12:18:35 1.8 20.5 12:18:55 5.7 20.5 12:19:16 12.4 20.1 12:19:36 13.4 19.8 12:19:56 20.5 19.7 12:20:16 30.4 19.4 0.9 Run 1 12:20:36 33.0 19.2 0.9 Run 1 12:20:55 33.5 19.1 1.0 Run 1 12:21:15 37.9 19.1 1.0 Run 1 12:21:36 42.3 19.0 1.0 Run 1 12:21:56 44.2 18.9 1.1 Run 1 12:22:16 43.7 18.9 1.1 Run 1 12:22:36 45.1 18.9 1.1 Run 1 12:22:55 45.3 18.9 1.1 Run 1 12:23:15 47.4 18.8 1.1 Run 1 12:23:35 47.6 18.8 1.1 Run 1 12:23:56 47.8 18.8 1.1 Run 1 12:24:16 47.4 18.8 1.1 Run 1 12:24:36 48.1 18.8 1.1 Run 1 12:24:56 47.8 18.8 1.1 Run 1 12:25:15 47.3 18.8 1.1 Run 1 12:25:35 46.7 18.8 1.1 Run 1 12:25:56 45.0 18.8 1.1 Run 1 12:26:16 45.1 18.8 1.1 Run 1 12:26:36 43.6 18.8 1.1 Run 1 12:26:56 39.9 18.8 1.0 Run 1 12:27:16 36.6 18.8 1.0 Run 1 12:27:35 35.6 18.8 1.0 Run 1 12:27:55 33.4 18.8 1.0 Run 1 12:28:16 32.4 18.8 1.0 Run 1 12:28:36 31.0 18.8 1.0 Run 1 12:28:56 29.5 18.8 1.0 Run 1 12:29:16 28.8 18.8 1.0 Run 1 12:29:36 27.9 18.8 1.0 Run 1 12:29:55 27.2 18.8 1.0 Run 1 12:30:15 25.6 18.8 0.9 Run 1 12:30:36 24.8 18.8 0.9 Run 1 12:30:56 23.9 18.8 0.9 Run 1 12:31:16 23.0 18.8 0.9 Run 1 12:31:36 23.3 18.8 0.9 Run 1 12:31:55 23.3 18.8 0.9 Run 1 12:32:15 23.4 18.8 0.9 Run 1 12:32:35 23.1 18.8 0.9 Run 1 12:32:56 23.1 18.8 0.9 Run 1 12:33:16 23.1 18.8 0.9 Run 1 12:33:36 23.2 18.8 0.9 Run 1 12:33:56 22.7 18.8 0.9 Run 1 12:34:15 22.5 18.8 0.9 Run 1 12:34:35 22.8 18.8 0.9 Run 1 12:34:56 23.2 18.8 0.9 Run 1 0.1 0.1 0.2 0.5 0.6 0.7

18.7 13.3 2.3 1.0 0.6 0.1 Page 5 of 16 12:35:16 23.1 12:35:36 4.0 12:35:56 33.9Furnace 6 Hood ExhNVaste Gas Stack 602 Barr Engineering Reference Method Data Logger Output Northshore Mining

Time ppm % % 11:09:15 4.7 0.0 0.1 12:36:16 38.9 0.5 0.1 12:36:35 41.5 0.3 0.1 12:36:55 43.6 0.2 0.1 12:37:16 43.4 0.2 0.1 12:37:36 43.5 0.2 0.0 12:37:56 31.6 6.5 0.6 12:38:16 30.6 17.1 1.0 12:38:36 30.6 18.4 1.0 12:38:55 30.6 18.6 1.0 12:39:15 29.6 18.6 1.0 Run 1 12:39:36 29.0 18.6 1.0 Run 1 12:39:56 29.0 18.6 1.0 Run 1 12:40:16 29.2 18.6 1.0 Run 1 12:40:36 29.2 18.6 1.0 Run 1 12:40:55 29.0 18.6 1.0 Run 1 12:41:15 29.5 18.6 1.0 Run 1 12:41:35 30.4 18.5 1.0 Run 1 12:41:56 30.6 18.5 1.0 Run 1 12:42:16 29.9 18.5 1.0 Run 1 12:42:36 30.1 18.6 1.0 Run 1 12:42:56 30.6 18.5 1.0 Run 1 12:43:15 31.0 18.5 1.0 Run 1 12:43:35 31.0 18.5 1.0 Run 1 12:43:56 30.9 18.5 1.0 Run 1 12:44:16 31.4 18.5 1.0 Run 1 12:44:36 31.4 18.5 1.0 Run 1 12:44:56 31.1 18.6 1.0 Run 1 12:45:16 31.2 18.6 1.0 Run 1 12:45:35 31.6 18.6 1.0 Run 1 12:45:55 31.5 18.6 1.0 Run 1 12:46:16 32.3 18.6 1.0 Run 1 12:46:36 31.9 18.6 1.1 Run 1 12:46:56 32.3 18.6 1.0 Run 1 12:47:16 32.1 18.6 1.1 Run 1 12:47:36 32.3 18.6 1.0 Run 1 12:47:55 32.3 18.6 1.0 Run 1 12:48:15 32.1 18.6 1.0 Run 1 12:48:36 31.7 18.6 1.0 Run 1 12:48:56 31.7 18.6 1.0 Run 1 12:49:16 31.8 18.6 1.0 Run 1 12:49:36 31.5 18.6 1.0 Run 1 12:49:55 31.3 18.6 1.0 Run 1 12:50:15 31.9 18.6 1.0 Run 1 12:50:35 31.9 18.6 1.1 Run 1 12:50:56 31.7 18.6 1.1 Run 1 12:51:16 31.3 18.6 1.0 Run 1 12:51:36 31.8 18.6 1.0 Run 1 12:51:56 31.5 18.6 1.1 Run 1 12:52:15 31.7 18.6 1.1 Run 1 12:52:35 31.4 18.6 1.1 Run 1 12:52:56 31.8 18.6 1.1 Run 1 12:53:16 32.3 18.6 1.1 Run 1 12:53:36 31.8 18.5 1.1 Run 1 Page 6 of 16Northshore Mining Furnace 6 Hood Exh/Waste Gas Stack 602 Barr Engineering Reference Method Data Logger Output

Time ppm 11:09:15 4.7 0.0 0.1 12:53:56 31.7 18.5 1.1 Run 1 12:54:16 31.0 18.5 1.1 Run 1 12:54:35 31.5 18.5 1.1 Run 1 12:54:55 31.2 18.5 1.1 Run 1 12:55:16 31.5 18.6 1.1 Run 1 12:55:36 31.5 18.5 1.1 Run 1 12:55:56 31.5 18.6 1.0 Run 1 12:56:16 31.4 18.6 1.0 Run 1 12:56:36 31.6 18.6 1.0 Run 1 12:56:55 32.4 18.6 1.1 Run 1 12:57:15 31.8 18.6 1.0 Run 1 12:57:36 32.4 18.6 1.0 Run 1 12:57:56 32.4 18.6 1.0 Run 1 12:58:16 32.8 18.6 1.0 Run 1 12:58:36 32.9 18.6 1.0 Run 1 12:58:55 32.7 18.6 1.0 Run 1 12:59:15 32.5 18.6 1.0 RUN 1 - 1140-1300 12:59:35 33.0 18.6 1.0 NOx ppm 0 2 

### % CO 2 

### % 12:59:56 39.3 17.7 0.9 31.2 18.6 1.0 13:00:16 27.6 4.0 0.2 13:00:36 2.6 0.5 0.1 13:00:56 2.0 0.2 0.1 13:01:15 1.5 0.2 0.1 13:01:35 1.4 0.2 0.1 13:01:56 1.4 0.2 0.1 13:02:16 1.5 0.2 0.1 13:02:36 1.4 0.2 0.1 13:02:56 1.4 0.2 0.1 13:03:16 41.5 0.2 0.1 13:03:35 42.9 0.2 0.1 13:03:55 43.6 0.2 0.1 13:04:16 43.7 0.2 0.1 13:04:36 43.6 0.2 0.1 13:04:56 43.6 0.2 0.1 13:05:16 43.7 0.2 0.1 13:05:36 5.7 3.3 1.1 13:05:55 1.7 16.6 2.8 13:06:15 1.7 17.8 2.9 13:06:36 1.5 17.9 2.9 13:06:56 1.6 17.9 2.9 13:07:16 1.5 18.0 2.9 13:07:36 1.3 17.9 2.9 13:07:55 1.4 17.9 2.9 13:08:15 1.6 17.9 2.9 13:08:35 1.7 17.3 2.6 13:08:56 1.7 4.2 0.4 13:09:16 1.7 0.4 0.1 13:09:36 29.6 6.4 0.6 13:09:56 30.5 17.9 1.0 13:10:15 30.5 18.5 1.0 Run 2 13:10:35 31.0 18.6 1.0 Run 2 13:10:56 31.1 18.6 1.0 Run 2
Page 7 of 16Furnace 6 Hood Exh/Waste Gas Stack 602 Barr Engineering Reference Method Data Logger Output Northshore Mining

Time PPm % % 11:09:15 4.7 0.0 0.1 13:11:16 31.4 18.6 1.0 Run 2 13:11:36 31.5 18.6 1.0 Run 2 13:11:56 31.8 18.6 1.0 Run 2 13:12:16 31.8 18.6 1.0 Run 2 13:12:35 31.4 18.6 1.0 Run 2 13:12:55 31.5 18.6 1.0 Run 2 13:13:16 31.2 18.6 1.0 Run 2 13:13:36 30.9 18.6 1.0 Run 2 13:13:56 31.4 18.6 1.0 Run 2 13:14:16 30.9 18.6 1.0 Run 2 13:14:36 31.2 18.6 1.0 Run 2 13:14:55 30.9 18.6 1.0 Run 2 13:15:15 31.3 18.6 1.0 Run 2 13:15:36 31.8 18.6 1.0 Run 2 13:15:56 31.2 18.6 1.0 Run 2 13:16:16 31.5 18.6 1.0 Run 2 13:16:36 31.1 18.6 1.0 Run 2 13:16:55 31.2 18.6 1.0 Run 2 13:17:15 31.1 18.6 1.0 Run 2 13:17:35 31.3 18.6 1.0 Run 2 13:17:56 30.8 18.6 1.0 Run 2 13:18:16 30.6 18.6 1.0 Run 2 13:18:36 31.3 18.6 1.0 Run 2 13:18:56 31.1 18.6 1.0 Run 2 13:19:15 31.5 18.6 1.0 Run 2 13:19:35 31.2 18.6 1.0 Run 2 13:19:55 31.0 18.6 1.0 Run 2 13:20:16 30.9 18.6 1.0 Run 2 13:20:36 30.9 18.6 1.0 Run 2 13:20:56 30.9 18.6 1.0 Run 2 13:21:16 30.4 18.6 1.0 Run 2 13:21:35 31.0 18.6 1.0 Run 2 13:21:55 30.8 18.6 1.0 Run 2 13:22:16 31.0 18.6 1.0 Run 2 13:22:36 31.1 18.6 1.0 Run 2 13:22:56 30.8 18.6 1.0 Run 2 13:23:16 31.2 18.6 1.0 Run 2 13:23:36 31.0 18.6 1.1 Run 2 13:23:55 30.9 18.6 1.0 Run 2 13:24:15 30.5 18.6 1.0 Run 2 13:24:36 30.4 18.6 1.0 Run 2 13:24:56 30.7 18.6 1.0 Run 2 13:25:16 30.7 18.6 1.0 Run 2 13:25:36 30.6 18.6 1.0 Run 2 13:25:55 31.1 18.6 1.0 Run 2 13:26:15 31.0 18.6 1.0 Run 2 13:26:35 31.5 18.6 1.0 Run 2 13:26:56 31.6 18.6 1.0 Run 2 13:27:16 31.9 18.6 1.1 Run 2 13:27:36 31.7 18.6 1.1 Run 2 13:27:56 31.8 18.6 1.0 Run 2 13:28:15 31.8 18.6 1.1 Run 2 13:28:35 31.6 18.6 1.1 Run 2 Page 8 of 16Northsh ore Mining Furnace 6 Hood ExhANaste Gas Stack 602 Barr Engineering Reference Method Data Logger Output

Time PPm % % 11:09:15 4.7 0.0 0.1 13:28:55 31.0 18.6 1.0 Run 2 13:29:16 31.6 18.6 1.0 Run 2 13:29:36 31.8 18.6 1.0 Run 2 13:29:56 31.9 18.6 1.0 Run 2 13:30:16 32.8 18.6 1.1 Run 2 13:30:35 32.6 18.6 1.1 Run 2 13:30:55 33.3 18.6 1.0 Run 2 13:31:16 33.1 18.6 1.1 Run 2 13:31:36 33.3 18.6 1.0 Run 2 13:31:56 33.2 18.6 1.0 Run 2 13:32:16 33.0 18.6 1.0 Run 2 13:32:36 34.1 18.6 1.0 Run 2 13:32:55 35.3 18.6 1.1 Run 2 13:33:15 35.4 18.6 1.0 Run 2 13:33:36 35.9 18.6 1.0 Run 2 13:33:56 35.4 18.6 1.0 Run 2 13:34:16 35.6 18.6 1.0 Run 2 13:34:36 35.2 18.6 1.0 Run 2 13:34:55 35.3 18.6 1.0 Run 2 13:35:15 35.4 18.6 1.0 Run 2 13:35:35 35.0 18.6 1.0 Run 2 13:35:56 34.1 18.6 1.0 Run 2 13:36:16 33.5 18.6 1.0 Run 2 13:36:36 34.4 18.7 1.0 Run 2 13:36:56 33.5 18.6 1.0 Run 2 13:37:15 32.8 18.7 1.0 Run 2 13:37:35 32.5 18.7 1.0 Run 2 13:37:55 32.7 18.7 1.0 Run 2 13:38:16 32.5 18.7 1.0 Run 2 13:38:36 31.9 18.7 1.0 Run 2 13:38:56 31.3 18.7 1.0 Run 2 13:39:16 31.3 18.7 1.0 Run 2 13:39:35 31.1 18.7 1.0 Run 2 13:39:55 31.0 18.7 1.0 Run 2 13:40:16 30.7 18.6 1.0 Run 2 13:40:36 30.8 18.6 1.0 Run 2 13:40:56 30.2 18.6 1.0 Run 2 13:41:16 29.9 18.6 1.0 Run 2 13:41:36 29.6 18.6 1.0 Run 2 13:41:55 29.4 18.6 1.0 Run 2 13:42:15 29.9 18.7 1.0 Run 2 13:42:36 29.8 18.6 1.0 Run 2 13:42:56 30.2 18.6 1.0 Run 2 13:43:16 29.7 18.6 1.0 Run 2 13:43:36 30.1 18.6 1.0 Run 2 13:43:55 30.0 18.6 1.0 Run 2 13:44:15 30.5 18.6 1.0 Run 2 13:44:35 30.0 18.6 1.0 Run 2 13:44:56 30.4 18.6 1.0 Run 2 13:45:16 30.6 18.6 1.0 Run 2 13:45:36 30.4 18.6 1.0 Run 2 13:45:56 30.4 18.6 1.0 Run 2 13:46:15 30.1 18.6 1.0 Run 2 Page 9 of 16Furnace 6 Hood ExhNVaste Gas Stack 602 Barr Engineering Reference Method Data Logger Output Northshore Mining

Time PPm % % 11:09:15 4.7 0.0 0.1 13:46:35 30.6 18.7 1.0 Run 2 13:46:55 30.4 18.6 1.0 Run 2 13:47:16 30.4 18.7 1.0 Run 2 13:47:36 31.0 18.6 1.0 Run 2 13:47:56 31.2 18.6 1.0 Run 2 13:48:16 30.5 18.6 1.0 Run 2 13:48:35 30.9 18.7 1.0 Run 2 13:48:55 31.3 18.7 1.0 Run 2 13:49:16 31.1 18.7 1.0 Run 2 13:49:36 30.5 18.7 1.0 Run 2 13:49:56 31.1 18.7 1.0 Run 2 13:50:16 30.8 18.7 1.0 Run 2 13:50:36 31.4 18.7 1.0 Run 2 13:50:55 32.0 18.6 1.0 Run 2 13:51:15 32.1 18.6 1.0 Run 2 13:51:36 31.8 18.6 1.0 Run 2 13:51:56 31.5 18.6 1.0 Run 2 13:52:16 32.1 18.6 1.0 Run 2 13:52:36 31.3 18.6 1.0 Run 2 13:52:55 31.7 18.6 1.0 Run 2 13:53:15 31.4 18.6 1.0 Run 2 13:53:35 31.3 18.6 1.0 Run 2 13:53:56 31.5 18.6 1.0 Run 2 13:54:16 31.3 18.6 1.0 Run 2 13:54:36 31.6 18.6 1.0 Run 2 13:54:56 31.2 18.6 1.0 Run 2 13:55:15 31.4 18.6 1.0 Run 2 13:55:35 31.2 18.6 1.0 Run 2 13:55:55 31.6 18.6 1.0 Run 2 13:56:16 31.9 18.6 1.0 Run 2 13:56:36 31.5 18.6 1.0 Run 2 13:56:56 31.4 18.6 1.0 Run 2 13:57:16 31.7 18.6 1.0 Run 2 13:57:35 32.0 18.6 1.0 Run 2 13:57:55 31.3 18.6 1.0 Run 2 13:58:16 31.9 18.6 1.0 Run 2 13:58:36 32.3 18.6 1.0 Run 2 13:58:56 32.1 18.6 1.0 Run 2 13:59:16 32.4 18.6 1.0 Run 2 13:59:36 32.2 18.6 1.0 Run 2 13:59:55 32.2 18.6 1.0 Run 2 14:00:15 32.6 18.6 1.1 Run 2 14:00:36 31.7 18.6 1.1 Run 2 14:00:56 32.2 18.6 1.0 Run 2 14:01:16 31.7 18.6 1.0 Run 2 14:01:36 32.1 18.6 1.0 Run 2 14:01:55 32.7 18.6 1.0 Run 2 14:02:15 32.3 18.6 1.1 Run 2 14:02:35 33.1 18.6 1.1 Run 2 14:02:56 32.3 18.6 1.1 Run 2 14:03:16 32.0 18.6 1.0 Run 2 14:03:36 32.6 18.6 1.0 Run 2 14:03:56 32.7 18.6 1.0 Run 2 Page 10 of 16Northshore Mining

Time 11:09:15 Furnace 6 Hood Exh/Waste Gas Stack 602 Reference Method Data Logger Output

ppm 

### % 4.7 0.0 0.1 14:04:15 32.3 18.6 1.0 Run 2 14:04:35 31.9 18.6 1.0 Run 2 14:04:55 32.4 18.6 1.0 Run 2 14:05:16 32.5 18.6 1.0 Run 2 14:05:36 32.6 18.6 1.0 Run 2 14:05:56 32.3 18.6 1.0 Run 2 14:06:16 32.4 18.6 1.0 Run 2 14:06:35 33.3 18.6 1.0 Run 2 14:06:55 31.8 18.6 1.0 Run 2 14:07:16 31.5 18.6 1.0 Run 2 14:07:36 31.4 18.6 1.0 Run 2 14:07:56 31.2 18.7 1.0 Run 2 14:08:16 31.1 18.7 1.0 Run 2 14:08:36 31.2 18.7 1.0 Run 2 14:08:55 31.4 18.6 1.0 Run 2 14:09:15 31.0 18.6 1.0 RUN 2- 1310-1410 14:09:36 30.8 18.7 1.0 NOx ppm 

### 0 2 0 / 0 C 2 % 14:09:56 31.4 18.6 1.0 31.7 18.6 1.0 14:10:16 30.7 18.6 1.0 14:10:36 31.5 18.7 1.0 14:10:55 31.2 18.6 1.0 14:11:15 31.1 18.7 1.0 14:11:35 2.9 11.6 0.5 14:11:56 1.6 1.3 0.1 14:12:16 1.5 0.3 0.1 14:12:36 1.5 0.2 0.1 14:12:56 1.5 0.2 0.1 14:13:15 1.5 0.2 0.1 14:13:35 25.2 0.2 0.1 14:13:55 42.8 0.2 0.1 14:14:16 43.6 0.2 0.1 14:14:36 43.8 0.2 0.1 14:14:56 43.8 0.2 0.1 14:15:16 43.9 0.2 0.1 14:15:35 43.7 0.2 0.1 14:15:55 30.1 0.2 0.2 14:16:16 2.2 11.8 2.4 14:16:36 1.8 17.7 2.9 14:16:56 1.7 17.9 2.9 14:17:16 1.7 17.9 2.9 14:17:36 1.6 18.0 2.9 14:17:55 1.6 17.9 2.9 14:18:15 1.7 17.9 2.9 14:18:36 1.5 17.9 2.9 14:18:56 1.8 17.3 2.6 14:19:16 1.6 4.0 0.4

Time NOx 02 CO2 Time ppm 14:20:45 31.2 18.2 1.0 14:21:05 31.3 18.6 1.0 14:21:24 30.9 18.6 1.0 Barr Engineering

Page 11 of 16Furnace 6 Hood ExhNVaste Gas Stack 602 Barr Engineering Reference Method Data Logger Output Northshore Mining

Time 11:09:15 14:21:44 ppm 4.7 30.8 % 0.0 18.6 % 0.1 1.0 14:22:04 31.4 18.6 1.0 Run 3 14:22:25 31.2 18.6 1.0 Run 3 14:22:45 31.5 18.6 1.0 Run 3 14:23:05 30.5 18.7 1.0 Run 3 14:23:25 31.0 18.7 1.0 Run 3 14:23:44 30.7 18.7 1.0 Run 3 14:24:04 31.0 18.7 1.0 Run 3 14:24:24 31.2 18.7 1.0 Run 3 14:24:45 31.0 18.6 1.0 Run 3 14:25:05 31.0 18.7 1.0 Run 3 14:25:25 31.4 18.7 1.0 Run 3 14:25:45 31.3 18.6 1.0 Run 3 14:26:04 31.1 18.6 1.0 Run 3 14:26:24 31.3 18.7 1.0 Run 3 14:26:45 31.1 18.7 1.0 Run 3 14:27:05 31.2 18.7 1.0 Run 3 14:27:25 31.0 18.6 1.0 Run 3 14:27:45 30.8 18.7 1.0 Run 3 14:28:05 30.8 18.7 1.0 Run 3 14:28:24 30.8 18.7 1.0 Run 3 14:28:44 30.5 18.7 1.0 Run 3 14:29:05 31.2 18.7 1.0 Run 3 14:29:25 30.9 18.7 1.0 Run 3 14:29:45 31.2 18.7 1.0 Run 3 14:30:05 32.0 18.7 1.0 Run 3 14:30:24 31.7 18.7 1.0 Run 3 14:30:44 31.9 18.7 1.0 Run 3 14:31:04 32.0 18.6 1.0 Run 3 14:31:25 32.1 18.7 1.0 Run 3 14:31:45 32.3 18.7 1.0 Run 3 14:32:05 31.7 18.7 1.0 Run 3 14:32:25 32.2 18.7 1.0 Run 3 14:32:44 32.0 18.7 1.0 Run 3 14:33:04 32.1 18.7 1.0 Run 3 14:33:24 32.5 18.6 1.0 Run 3 14:33:45 32.1 18.6 1.0 Run 3 14:34:05 32.3 18.6 1.0 Run 3 14:34:25 32.5 18.6 1.0 Run 3 14:34:45 32.8 18.6 1.0 Run 3 14:35:04 32.4 18.6 1.0 Run 3 14:35:24 32.8 18.7 1.0 Run 3 14:35:45 32.7 18.6 1.0 Run 3 14:36:05 32.6 18.6 1.0 Run 3 14:36:25 33.0 18.6 1.0 Run 3 14:36:45 32.8 18.6 1.0 Run 3 14:37:05 32.7 18.7 1.0 Run 3 14:37:24 32.0 18.7 1.0 Run 3 14:37:44 32.1 18.7 1.0 Run 3 14:38:05 31.9 18.7 1.0 Run 3 14:38:25 32.4 18.7 1.0 Run 3 14:38:45 32.4 18.6 1.0 Run 3 14:39:05 32.5 18.6 1.0 Run 3 Page 12 of 16Northshore Mining Furnace 6 Hood Exh/Waste Gas Stack 602 Barr Engineering Reference Method Data Logger Output

Time PPm % cyo 11:09:15 4.7 0.0 0.1 14:39:24 32.4 18.6 1.0 Run 3 14:39:44 32.5 18.6 1.0 Run 3 14:40:04 32.6 18.6 1.0 Run 3 14:40:25 32.8 18.6 1.0 Run 3 14:40:45 32.6 18.6 1.0 Run 3 14:41:05 32.7 18.6 1.0 Run 3 14:41:25 32.1 18.6 1.0 Run 3 14:41:44 32.3 18.6 1.0 Run 3 14:42:04 32.7 18.6 1.0 Run 3 14:42:24 32.3 18.6 1.0 Run 3 14:42:45 32.3 18.6 1.0 Run 3 14:43:05 32.2 18.6 1.0 Run 3 14:43:25 32.5 18.6 1.0 Run 3 14:43:45 32.6 18.6 1.0 Run 3 14:44:04 32.1 18.6 1.0 Run 3 14:44:24 32.4 18.6 1.0 Run 3 14:44:44 32.5 18.6 1.0 Run 3 14:45:05 32.0 18.6 1.0 Run 3 14:45:25 32.1 18.6 1.0 Run 3 14:45:45 32.5 18.6 1.0 Run 3 14:46:05 32.6 18.6 1.0 Run 3 14:46:24 31.9 18.6 1.0 Run 3 14:46:44 32.6 18.6 1.0 Run 3 14:47:05 32.4 18.6 1.0 Run 3 14:47:25 32.4 18.6 1.0 Run 3 14:47:45 31.4 18.6 1.0 Run 3 14:48:05 32.8 18.6 1.0 Run 3 14:48:24 32.5 18.6 1.0 Run 3 14:48:44 32.7 18.6 1.0 Run 3 14:49:04 32.3 18.6 1.0 Run 3 14:49:25 32.0 18.6 1.0 Run 3 14:49:45 32.3 18.6 1.0 Run 3 14:50:05 32.5 18.6 1.0 Run 3 14:50:25 33.0 18.6 1.0 Run 3 14:50:44 32.9 18.6 1.0 Run 3 14:51:04 32.4 18.6 1.0 Run 3 14:51:24 33.2 18.6 1.0 Run 3 14:51:45 32.7 18.6 1.0 Run 3 14:52:05 33.4 18.6 1.0 Run 3 14:52:25 32.9 18.6 1.0 Run 3 14:52:45 32.9 18.6 1.0 Run 3 14:53:04 32.8 18.6 1.0 Run 3 14:53:24 32.9 18.6 1.0 Run 3 14:53:44 32.8 18.6 1.0 Run 3 14:54:05 32.1 18.6 1.0 Run 3 14:54:25 32.6 18.6 1.0 Run 3 14:54:45 33.0 18.6 1.0 Run 3 14:55:05 32.4 18.6 1.0 Run 3 14:55:24 32.7 18.6 1.0 Run 3 14:55:44 32.4 18.6 1.0 Run 3 14:56:05 32.6 18.6 1.0 Run 3 14:56:25 32.7 18.6 1.0 Run 3 14:56:45 33.0 18.6 1.0 Run 3 Page 13 of 16Furnace 6 Hood Exh/Waste Gas Stack 602 Barr Engineering Reference Method Data Logger Output Northshore Mining

Time PPm % % 11:09:15 4.7 0.0 0.1 14:57:05 32.7 18.6 1.0 Run 3 14:57:24 32.6 18.6 1.0 Run 3 14:57:44 33.3 18.6 1.0 Run 3 14:58:04 32.6 18.6 1.0 Run 3 14:58:25 32.6 18.6 1.0 Run 3 14:58:45 32.6 18.6 1.0 Run 3 14:59:05 32.4 18.6 1.0 Run 3 14:59:25 32.1 18.6 1.0 Run 3 14:59:44 32.4 18.6 1.0 Run 3 15:00:04 32.2 18.6 1.0 Run 3 15:00:24 32.3 18.6 1.0 Run 3 15:00:45 32.1 18.6 1.0 Run 3 15:01:05 32.2 18.6 1.0 Run 3 15:01:25 32.4 18.6 1.0 Run 3 15:01:45 32.2 18.6 1.0 Run 3 15:02:04 32.1 18.6 1.0 Run 3 15:02:24 32.1 18.6 1.0 Run 3 15:02:44 32.4 18.6 1.0 Run 3 15:03:05 32.2 18.6 1.0 Run 3 15:03:25 31.9 18.6 1.0 Run 3 15:03:45 32.6 18.6 1.0 Run 3 15:04:05 32.0 18.6 1.0 Run 3 15:04:24 32.3 18.6 1.0 Run 3 15:04:44 31.4 18.6 1.0 Run 3 15:05:05 32.5 18.6 1.0 Run 3 15:05:25 32.1 18.6 1.0 Run 3 15:05:45 32.6 18.6 1.0 Run 3 15:06:05 32.6 18.6 1.0 Run 3 15:06:24 32.8 18.6 1.0 Run 3 15:06:44 32.4 18.6 1.0 Run 3 15:07:04 32.7 18.6 1.0 Run 3 15:07:25 32.6 18.6 1.0 Run 3 15:07:45 32.8 18.6 1.0 Run 3 15:08:05 32.9 18.6 1.0 Run 3 15:08:25 33.3 18.6 1.0 Run 3 15:08:44 33.5 18.6 1.0 Run 3 15:09:04 32.9 18.6 1.0 Run 3 15:09:24 33.0 18.6 1.0 Run 3 15:09:45 33.2 18.6 1.0 Run 3 15:10:05 33.0 18.6 1.0 Run 3 15:10:25 32.6 18.6 1.0 Run 3 15:10:45 33.3 18.7 1.0 Run 3 15:11:04 32.6 18.6 1.0 Run 3 15:11:24 32.3 18.7 1.0 Run 3 15:11:44 32.6 18.7 1.0 Run 3 15:12:05 32.9 18.6 1.0 Run 3 15:12:25 32.5 18.6 1.0 Run 3 15:12:45 32.2 18.6 1.0 Run 3 15:13:05 32.1 18.6 1.0 Run 3 15:13:24 32.1 18.6 1.0 Run 3 15:13:44 32.2 18.6 1.0 Run 3 15:14:05 32.5 18.6 1.0 Run 3 15:14:25 32.8 18.6 1.0 Run 3 Page 14 of 16Northshore Mining Furnace 6 Hood Exh/Waste Gas Stack 602 Barr Engineering Reference Method Data Logger Output

Time 11:09:15 ppm 4.7 °A 0.0 0/ 0 0.1 15:14:45 32.7 18.6 1.0 Run 3 15:15:05 32.7 18.6 1.0 Run 3 15:15:24 32.9 18.6 1.0 Run 3 15:15:44 32.9 18.6 1.0 Run 3 15:16:04 33.2 18.6 1.0 Run 3 15:16:25 32.8 18.6 1.0 Run 3 15:16:45 32.7 18.6 1.0 Run 3 15:17:05 32.7 18.6 1.0 Run 3 15:17:25 32.7 18.6 1.0 Run 3 15:17:44 32.5 18.6 1.0 Run 3 15:18:04 33.0 18.6 1.0 Run 3 15:18:24 32.6 18.6 1.0 Run 3 15:18:45 32.9 18.6 1.0 Run 3 15:19:05 33.0 18.6 1.0 Run 3 15:19:25 32.6 18.6 1.0 Run 3 15:19:45 32.1 18.6 1.0 Run 3 15:20:04 31.8 18.6 1.0 Run 3 15:20:24 31.8 18.6 1.0 Run 3 15:20:44 32.3 18.6 1.0 Run 3 15:21:05 31.9 18.6 1.0 RUN 3 - 1422-1522 15:21:25 31.9 18.6 1.0 NOx ppm 

### 02 % CO 2 

### % 15:21:45 31.9 18.6 1.0 32.3 18.6 1.0 15:22:05 31.7 18.6 1.0 15:22:24 32.1 18.6 1.0 15:22:44 32.2 18.7 1.0 15:23:05 31.9 18.6 1.0 15:23:25 31.5 18.7 1.0 15:23:45 28.2 18.7 1.0 15:24:05 2.4 9.0 0.4 15:24:24 1.6 0.9 0.1 15:24:44 1.6 0.3 0.1 15:25:04 1.5 0.2 0.1 15:25:25 1.5 0.2 0.1 15:25:45 1.5 0.2 0.1 15:26:05 1.6 0.2 0.1 15:26:25 42.1 0.2 0.1 15:26:44 43.5 0.2 0.1 15:27:04 43.5 0.2 0.1 15:27:24 43.6 0.2 0.1 15:27:45 43.6 0.2 0.1 15:28:05 43.5 0.2 0.1 15:28:25 2.8 6.9 1.7 15:28:45 1.7 17.5 2.9 15:29:04 1.7 17.9 2.9 15:29:24 1.7 18.0 2.9 15:29:44 1.7 18.0 2.9 15:30:05 1.6 18.0 2.9 15:30:25 1.9 19.4 1.0 15:30:45 1.9 20.8 0.2 15:31:05 1.8 20.9 0.2 15:31:24 1.9 20.9 0.2 15:31:44 1.9 20.9 0.2
Page 15 of 16

### Northshore Mining Furnace 6 Hood Exh/Waste Gas Stack 602 Barr Engineering Reference Method Data Logger Output

Time PPm % % 11:09:15 4.7 0.0 0.1 15:32:05 1.4 20.9 0.2

Page 16 of 16

# Appendix D

Calibration Data

### EPA M5 POST TEST METER CALIBRATION

Control Modt C3 Barometric Pressure 29.45 Project: North Shore Mining Previous Y 1 Date: 01/31/01 Previous Delta H 1.7251 Tech: JZS2 Vacuum, in Hg 6"

Orifice

Diff Presure dH Dry Gas Volume, Cubic Feet Wet Test Volume, Cubic Feet Dry Gas Meter Temp, F Wet Test Meter Temp, F Elapsed Time of Cal. Point Meter Coefficient Y Orifice Coefficient dHn Inlet I Outlet Nominal

1.75 Final 79.385 Final 6963.00 Final 87.0 Final 77.0 Final 66.0 Minutes 13.0 SEC 21.06

0.9847 1.7348 Actual

1.75 Initial 68.995 Initial 6953.00 Initial 84.0 Initial 74.0 Initial 66.0 Minutes

13.351 Total 10.390 Total 10.000 Average 85.5 Average 75.5 Average 66.0 80.500 Tm Nominal

1.75 Final 90.890 Final 6974.00 Final 89.0 Final 78.0 Final 66.0 Minutes 13.0 SEC 22.13

0.9822 1.7330 Actual

1.75 Initial 80.430 Initial 6964.00 Initial 87.0 Initial 77.0 Initial 66.0 Minutes

13.369 Total 10.460 Total 10.000 Average 88.0 Average 77.5 Average 66.0 82.750 Tm Nominal

1.75 Final 102.44 Final 6985.00 Final 90.0 Final 80.0 Final 66.0 Minutes 13.0 SEC 23.5

0.9807 1.7341 Actual

1.75 Initial 91.94 Initial 6975.00 Initial 89.0 Initial 78.0 Initial 66.0 Minutes

13.392 Total 10.505 Total 10.000 Average 89.5 Average 79.0 Average 66.0 84.250 Tm Average 0.9825 1.7339

### B Side Calibration Data Trial Number AP Std. In. H 2 0 AP S-type In. H 2 0 Pitot Coef. Cp • Coefficient Deviation 

### 1 , I 2. 

### 47 ,t346, ,00b 2 /..X 

### 0 .832. 3 

### .6?9 

## • 8 , 4 1 - ,o0 7- 4 

### 4.389 ,etLio• ,000 Average 

### ,z5i 0 D 

### Engineering Company

S-Type Pitot Calibraton

Leak Check: Negative: A" WC 1. 

### Positive: /.@4" 

### WC Pitot Tube Number: Date fo Calibration: 5/ Technician: (+y7

A Side Calibration Data Trial Number AP Std. In. H 2 0 AP S-type In. H 2 0 Pitot Coef. Cp Coefficient Deviation
1 

# r),(

' 

## 53 

## 7 003 2

, 350 

## -Bcf 3 ,c:o3
3 

### ,L5o /8ti 

# o

, 

## Pa .CnO 4 

### //voo 

## b3 

## 1

- 7 -838 co Average 

## 81 0 _Co

Pitot Tube Coefficient = (A side Op + B side Cp)/2

A side / B side Deviation = A side Op- B side Cp

Coefficient Calcualtion: Cp s-type = Cp standard X 

### 64 0

000

AP Standard AP S-TypeIce H20 Boiling H20 Hot Oil Ambient Media Other

1.10111I Std Used 

# '379? Eli/2
Reference Deg F (To) 

### 32,1 

# 21 0
Reference emergent stem temp (Te) 

### 0(
Reference emergent stem length (L) C
Reference Corr Temp (deg F)
Reference Corr Temp (deg R) deg F + 460 Probe Temp (deg F) 

# (070 20(
Probe Temp (deg R), deg F + 460 Difference (degrees) 

## log 

# 4 06

' 

# 6.6X
0
% Diff Abs. T (Renkin) 

### 40 ,10

— 

# 0,30 Engineering Company

Thermocouple Number C 

# 3 THERMOCOUPLE CALIBRATION

Date: 

## 3/2- 0/GC

Technichian:

Diff. less than 1.5% at all points ' Graph Attached Extrapolated Range with Dill. <= 1.5% to

Desa

- iption of the thermocouple's function: 

# C "1 P140( 4 

## ie 

# C- 3 

## 1c.4e. r..tff

- 7 e47

If not acceptable, describe corrective procedures undertaken:

P:100\0210EM\Datasheets1calibrationAsI It 

### Engineering Company

Thermocouple Number 

# e 3 6 THERMOCOUPLE CALIBRATION

Date:
Technichian: 1 

## 4-/c

Media Ice H20 Boiling H20 Hot Oil Ambient Other
Std Used 

# 37 97 3/Yq9
Reference Deg F (To) 

# 2.1
Reference emergent stem temp (Te) Reference emergent stem length (L) Reference Corr Temp (deg F) 

## 2( 0

Reference Corr Temp (deg R) deg F + 460

, 

## i6715 1 5 -- Probe Temp (deg F) :2 2 

## 10
Probe Temp (deg R), deg F + 460 

# 13, 6
Difference (degrees)

- 

### 0-0
% Diff Abs. T (Renkin) 

### b- 0

Diff. less than 1.5% at all points Graph Attached Extrapolated Range with 01ff. <= 1.5% to

Description of the thermocouple's function: 

# c ovi A,- 0 ( i-LJe)L)1.-e 

# C 3 2)6-it& 

## ou-ko)t

If not acceptable, describe corrective procedures undertaken:

P

-

.100\0210EM1Datasheetslcalibration.xls

# Appendix E
Cylinder Gas Certifications'

- 

### I 

# DUCTS AMY For Technical Information Call 1-800-752-1597


## ISO CERTIFICATION: 9002 Air Products and Chemicals, Inc. * 12722 S. Wentworth Avenue, Chicago, IL 60628



# CERTIFICATE OF ANALYSIS: EPA PROTOCOL GAS STANDARD •

Customer: Order No: CSS-427973-01

AIR PRODUCTS & CHEMICALS, INC. Batch No: 861-68342 373 CANTERBURY ROAD PO: SHAKOPEE MN 55379 Release: Cylinder No: 5G9149033BAL Bar Code No: FAF008 Cylinder Pressure*: 2000 psig Certification Date: 04/10/2000 Expiration Date: 04/10/2002

Analyst:

(16921) Pub. No. 320-9702 Approved By: HOLLY HATTENDORF RICHARD FRY PERFORMED ACCORDING TO EPA TRACEABILITY PROTOCOL FOR ASSAY AND CERTIFICATION OF GASEOUS CALIBRATION STANDARDS (PROCEDURE #G1)

CERTIFIED CONCENTRATION REFERENCE STANDARDS ANALYTICAL INSTRUMENTATION

Certified Concentration NITRIC OXIDE L.0 ±0.65 PPM NO2 (Reference Value Only): .700 PPM NITROGEN Balance Gas * STANDARD SHOULD NOT BE USED BELOW 150 PSIG Standard Concentration 88.10 PPM Instrument Serial Last Measurement Make/Model Number Calibration Principal ROSEMOUNT 04/11/00 CHEMILUMINESCENCE Standard

Type Component Cylinder Number SG9I68815BAL NTRM

# )ATE OF P

. t.NALYSIS:

. :EPA 

# PROTOCOL GAS. STAND

PERFORMED ACCORDING TO EPA TRACEABILITY PROTOCOL FOR ASSAY AND CERTIFICATION OF GASEOUS CALIBRATION STANDARDS (PROCEDURE #G1) WM;

CERTIFIED CONCENTRATION REFERENCE STANDARDS ANALYTICAL INSTRUMENTATION

.01M1111111 ■ 1 ■■ ••• ■ •• 1 Certified Concentration Component Cylinder Number Standard Type

. Standard Concentration Instrument Make/Model Serial Number Last Calibration
NITRIC OXIDE 240 ±1.6 PPM SG9150613BAL NTRM 81685X 168.2 PPM ROSEMOUNT 04/10/00 Measurement Principal CHEMILUM1NESCENCE

Richard Fry Analyst: Abbasi Husain Approved By: 

### For Technical Information Call 1-800-752-1597 

# AIR Jr PRODU 

# CTS

Air Products and Chemicals, Inc. * 12722 S. Wentworth Avenue, Chicago, IL 60628 

## ISO CERTIFICATION: 9002

Customer: 

### AIR PRODUCTS & CHEMICALS, INC. 373 CANTERBURY ROAD SHAKOPEE MN 55379 Order No: CSS-429091-01 Batch No: 861-68343 PO: Release: Cylinder No: SG9147693BAL Bar Code No: FAF007 Cylinder Pressure*: 2000 psig Certification Date: 04/10/2000 Expiration Date: 04/10/2002

NO2 (Reference Value Only): .100 PPM
NITROGEN Balance Gas • * STANDARD SHOULD NOT BE USED BELOW 150 PIG

(16921) Pub. No. 320-9702PERFORMED ACCORDING TO EPA TRACEABILITY PROTOCOL FOR ASSAY AND CERTIFICATION OF GASEOUS CALIBRATION STANDARDS (PROCEDURE #G1)

Serial Number Standard

Type Instrument Make/Model Standard Concentration Component Last Measurement Calibration Principal

04/10/99 CHEMILUMINESCENCE 010877 NTRM 82630 1477 PPM NITRIC OXIDE ROSEMOUNT 951A NO2 (Reference Value Only): 1 90
NITROGEN Balance Gas * STANDARD SHOULD NOT BE USED BELOW 150 PSIG Certified Cylinder Concentration Number

447 t7.5 PPM S091688608AL
PPM CERTIFIED CONCENTRATION REFERENCE STANDARDS ANALYTICAL INSTRUMENTATION

Analyst: Approved By: Chris Basile James Laas 

### For Technical Information Call 1-800-752-1597 

# AIR 

# Zt... PRODU 

# CTS

Air Products and Chemicals, Inc. * 12722 S. Wentworth Avenue, Chicago, IL 60628 

## ISO CERTIFICATION: 9002

Customer: Order No: CSS-178669-01 AIR PRODUCTS & CHEMICALS, INC. Batch No: 861-56299 373 CANTERBURY ROAD PO: SHAKOPEE MN 55379 Release: Cylinder No: SG9140415BAL Bar Code No: BXK219 Cylinder Pressure*: 2000 psig Certification Date: 04/19/1999 Expiration Date: 04/19/2001

). No. )702Patricia J. Williams Bruce Andersen e311
Analyst: Approved By: / 1),.0 /C-3 4 t/L-" ( 

### w--- ,/ /)ZA4 / , ) 77/7 

## 76. 6-itee 

## ttv

- A___) For Technical Information Call 1-800-752-1597 

# AIR LA 

# PRODUCTS

Air Products and Chemicals, Inc. * Rural Route #1, Tamaqua, PA 18252 

## ISO CERTIFICATION: 9002 

# CERTIFIdATE OF ANALYSIS: EPA PROTOCOL GAS STANDARD

PERFORMED ACCORDING TO EPA TRACEABILITY PROTOCOL FOR ASSAY AND CERTIFICATION OF GASEOUS CALIBRATION STANDARDS (PROCEDURE #G1)

Customer: AIR PRODUCTS & CHEMICALS, INC. 373 CANTERBURY ROAD SHAKOPEE MN 55379 Order. No: CSS-293801-01 Batch NO: 255-7468E PO: Release

. :

. Cylinder No: SG9151731BAL Bar Code No: DDN869 Cylinder Pressure*: 2000 psig Certification Date: 10/13/1999 Expiration Date: 10/12/2002

CERTIFIED CONCENTRATION

/1111=7692. •=11.1100111=1 REFERENCE STANDARDS ANALYTICAL INSTRUMENTATION

Component Certified Concentration Cylinder Number Standard Type Standard Concentration Instrument Make/Model Serial Number Last Calibration Measurement Principal
CARBON DIOXIDE 10.1±0.06 SG9169557BAL NTRM 81675X 10.82 % Shimadzu Model C1049300 10/06/99 GC-TCD
OXYGEN 10.1±0.06 t SG9168291BAL NTRM 82658X 16.04 t SMIMADIU GC-8A 59405U 10/06/99 GC-TCD
NITROGEN Balance Gas * STANDARD SHOULD NOT BE USED BELOW 150 PSIG

(16921) Pub. No. 320-9702

# Appendix F
Process Operating Data

### OPERATING DATA SUMMARY FOR PROCESS SOURCES Form OPS01 June 1999 

### Test Date(s): 1.../Do/o o 

### Process Equipment Number/Identification: ES ic:rt /14S P.05" 

### Company Name: Isko (1114-111-6 14(atNic 94-A•Nly 

### Equipment & Operating Data I. Process Equipment Description:



### - Ls.. racno
- 1<:73-gittp t TAW-- - 0 4-Vrt_ CIAS VP-04 , ( 

### 7

.

-) 61-14c,C 

### 2. Were the process and control equipment operated consistent with normal operating procedures? YES NO If no, explain:

3. Include copy of production records or instrumentation which indicates rate of production or operation of the equipment, i.e. units

per hour, pounds per hour, pressure, air flow, etc. 4. Date(s) and procedure(s) of last maintenance/cleaning within 6 months: 0 Remains unchanged from info, provided in test plan
t° 13, >c , 00 - SM.4. "Z 4

- , I i-4 3 Wilt+ OLP TIRO (NITIAA Ce• STFOCZIN P-1 .- oF PF-et_sP (TATpe. ire4D um-rEt_ 60PPL-r te"Irs .4.10 *1-"riTi/4c5 

### 5. Process rate (amount of raw material or finished product per hour, wet or dry basis) while combusting (list fuel type(s) and ratios as

appropriate)
Process Parameter: list type and units 

### Run 

### 1 Run 2 Run 3 

### au-4z r- R1/44.- , c-LD Put- 4=0i2- ( 1 -w-i4(Rus



### Fuel Input (list units) ( 130 

### Heat Inplit4 , 10 6 British thermal units/hour)

6. Summarize control equipment operating data documented during testing. Values reported should reflect maximum, minimum,

averages, or as approved in the test plan. (See test plan and approval letter) Examples of APC equipment and parameters generally monitored. Monitor as specified in test plan approval letter.

• Scrubber (list type of scrubber): AP (in. w.c.) and feed rate (gpm and psig) e Baghouse, Cyclone, and Multi-clone: AP (in. w.c.)

• Catalytic Incinerator:(:7 1
, ,°Fout) and Thermal Incinerator: (°Foperating • Number and identity of operating ESP field(s)

temperature) APC and parameter monitored 

### Run 1 Run 2 Run 3 

### AvEme.t. A.,pEe,..4.€_ 1 , 1 1 / i /8 AvAAA-4.4_ Voi-TAG.
A1/4161-460._. 

### L3ArreaL fl..o... 

# CT p 4.4.,.. /L/9 

### P./9 /q 9

List pollutant & averaging basis.--should reflect permit Run I 

### Run 1 Run 1 Continuous Opacity Monitor (list hourly average) Monitor (list averaging basis): , Monitor (list averaging basis:
Abbreviations: APC-air pollution control gpm.-gallons per minute in. w.c.-inches of water column lbs.-pounds psig-pressure per square inch gauge AP- pressure drop
Note: This form provides only a summary of the operating conditions during the performance test. Additional and more detailed records are required to meet the requirements of Minn. R. 7017.2035, subp. 3. This form is to be submitted as part of the performance test report to: North, Metro, or South District, Performance Test Coordinator, MN Pollution Control Agency, 520 Lafayette Rd, St. Paul, MN 55155-4194.

### OPERATING DATA SUMMARY FOR PROCESS SOURCES Form OPSOI June 1999 

### Process Equipment Number/Identification: 

### ES I Test Date(s): I .>/loc:7 

### Company Name: ',lawn-1st-104g.RttM&0.42.4m-,47 

### Equipment & Operating Data 1. Process Equipment Description: Uber"- 63 44,- EI-EzTPOS.174114- Cu-stAce 1-6P V-4 4 0

- 4

-

11r 

### 2. Were the process and control equipment operated consistent with normal operating procedures NO If no, explain: 

# y g4 Ke.E.F1- For- 010 1 a.r° fOC.Nthel. 3zo.zpi I>igAge. 4-014 4 1 Fog- 9 ftilstoreg 

### 3. Include copy of production records or instrumentation which indicates rate of production or operation of the equipment, i.e. units

per hour, pounds per hour, pressure, air flow, etc. 

### 4. Date(s) and procedure(s) of last maintenance/cleaning within 6 months: 0 Remains unchanged from info, provided in test plan

.coo F-EY 4 -OVE1' frP , 7E

- U .srfk) GT e fe

- c_ of re

- r

- c

- R(7742*

- A440

ss
-

Noei

- ci L-{,4L. Fri774k4 

### 5. Process rate (amount of raw material or fmished product per hour, wet or dry basis) while combusting (list fuel type(s) and ratios as

appropriate)
Process Parameter: list type and units Run 1 Run 2 Run 3

DF AU-L13 P124) ooe..i.c. 41a.12-. 0- 4,44

- 17;14s) /a 

### S - / /



### Fuel Input (list units) A.beract4,...c ( 144

- 4) & I 

### 13 Heat Input (10 6 British thermal units/hour) G. ,c to' %< 0 -1 o i


### 6. Summarize control equipment operating data documented during testing. Values reported should reflect maximum, minimum,

averages

, 

### or as approved in the test plan. (See test plan and approval letter) Examples of APC equipment and parameters generally monitored. Monitor as specified in test plan approval letter.

• Scrubber (list type of scrubber): AP (in. w.c.) and feed rate (gpm and psig) • Baghouse, Cyclone, and Multi-clone: AP (in. w.c.)

• Catalytic Incinerator:(°Fi r , , ° F.) and Thermal Incinerator: (°Foperating 

### • Number and identity of operating ESP field(s)

temperature) APC and parameter monitored Run 

### 1 Run 2 Run 3

Avi-R-44e. Voi-n44L / / /

AVE-0-44E- Uptcrkg- 

### ri„.„_.> Cy0
, -) 

### /q5' /q8 

## NE,

List pollutant & averaging basis.--should reflect permit Run I Run I Run 

### 1 Continuous Opacity Monitor (list hourly average) Monitor (list averaging basis): Monitor (list averaging basis:
Abbreviations: APC-air pollution control lbs.-pounds gpm.-gallons per minute psig-pressure per square inch gauge in. w.c.-inches of water column AP- pressure drop
Note: This form provides only a summary of the operating conditions during the performance test. Additional and more detailed records are required to meet the requirements of Minn. R. 7017.2035, subp. 3. This form is to be submitted as part of the performance test report to: North, Metro, or South District, Performance Test Coordinator, MN Pollution Control Agency, 520 Lafayette Rd., St. Paul, MN 55155-4194.

# Northshore Mining Company Stack Test Data
December, 2000

Precipitator Run# Long Tons Gas Burned Date Start Time Stop Time Pellets per Hour(kcfh) Average Amperage Average Voltage Water Flow to Precips (gpm)

602 1 12121/00 11:40:00 AM 12:40:00 PM 104.88 61 5 1.0 149
602 2 12/21/00 1:10:00 PM 2:10:00 PM 126.50 73 5 1.0 148

602 3 12/21/00 2:22:00 PM 3:22:00 PM 129.20 72 5 1.1 148

1203 1 12/20/00 2:05:00 PM 3:05:00 PM 209.63 112 25 4.5 157
1203 2 12/20/00 3:25:00 PM 4:25:00 PM 221.96 128 7 0.2 156
1203 3 12/20/00 4:35:00 PM 5:35:00 PM 224.93 131 7 0.3 156
1205 1 12/20/00 8:15:00 AM 9:15:00 AM 222.90 130 14 4.9 149
1205 2 12/20/00 9:38:00 AM 10:38:00 AM 221.77 129 19 6.3 149

_ 1205 3 12/20/00 10:51:00 AM 11:56:00 AM 221.32 129 18 6.2 149

Monday, Janualy 08, 2001 Page 1 of!

# Bar r PROCESS OPERATION Engineering Company 

## INFORMATION DATA SHEET

Client Facility Sample Location

Notes: /



## 130 Reading No. Nominal Time Actual Time Operating Rate (TPH) Secondary Volts
Run # 

# t Primary Amperes 5141ktt.. Water Rate ( ) Flow ( ) Wet Wall ESP

1 0 

# 1140C 123.
2 15 

# 14; zo 22,7.o
3 30 

### 1 

# 9:15 - 4 45
5 60 6 75 7 90
8 105 9 120

1 0 

## 5 IS

- 2 15 

## A

- 10 224- , 3 30 / 7 2 4 45 

## o IC
5 60
6 75
7 90
8 105 120 

# 2e.s
(si 

# 2.0.Z

9.6, 

## '0 ) 

# 10g

Jo TT"

Run # 

## 2_

C.) 

## o /0 

# z-

/ 6 LI ./ k/ / 

## IS?. 2 /c/ :7?-: 0 

### 7. 0 

### 7,1 0 Date Operators Test No.

# Bczi e PROCESS OPERATION Engineering Company 

## INFORMATION DATA SHEET

Client Facility Sample Location Date Operators
Test No.

Wet Wall ESP



### S1,

-



### • 1 

# r

iJ 

### o Reading

No. Nominal Time Actual Time Operating Rate (TPH) Secondary Volts Primary Amperes St

- patk(c Rate ( ) Water Flow (
Run #
1 0 

## / 1 

# -t, 0 t(
2 15 

### iS_C7) 4 7 77. 

### f2.)

. •

„ ) 

### •Y.
3 30 

### ID 

## ci

, 0 13 

### 1415 - 4 45 

### ?Id 7

- 7 

## 0 [2
5 60 

### 23c 7 f.? 

## ;L 7 S 1 6 75
7 90 8 105 9 120
Run #
1 0
2 15
3 30
4 45
5 60
6 75
7 90
8 105 9 120

Notes:Reading No. Nominal Time

1 0
2 15
3 30
4 45
5 60
6 75
7 90
8 105 120

1 0
2 15
3 30
4 45
5 60
6 75
7 90
8 105 9 120 

## 123 127 

# tz8
tzg 

# 9 1 8 27

. 0.e 

# s -- 3 . - 

# 1 ,t-f 

## IL! 

# Vg5i3 LiA 

# I 

# s

-- Z2.1 Lie 

# S !Lig. 8 Wet Wall ESP Actual Time Operating Rate (TPH) Secondary Volts 

# 'I Primary Amperes alcut 31: 7 1 444: Rate ( ) 

## 1° Water Flow ( )
Run # 

# 1 Lig 

# 9 ci3,19

1 if 

## c!. 00 

# 224.1 P 0 

## EPIC

. 

# 22.67 0 14 Z, 

# 228,0 22 

# 4 0 

# 1 0,1 

# i 'MC 2

- 

# z .8 6 7 19.-G

Run # 

## 2. 

# 1,7 t-i. 

# iy 

# a 1008 10 

# = 23

)(,) 

# Barr PROCESS OPERATION Engineering Company 

## INFORMATION DATA SHEET

Date 

# 12-7 0-00

. Operators

Test No. Client Facility Sample Location

Notes:Water Flow ( Wet Wall ESP Reading

No. Nominal Time

1 0 2 30 4 45 5 60 6 75 7 90 8 105 9 120

1 0 2 15 3 30 4 45 5 60 6 75
7 90 8 105 9 120 Actual Time Operating Rate (TPH) Secondary Volts k\of Primary Amperes Run # 0.2

Run # 

# 27.1_ 81)
il 

# l 11-19 - 1Y7 g1.9.5

fI T 

# P.( .‘ 

# iy4zo l I : 2r, 

# 2.2 , 1 

# 0 H z(-i1 2'21 

# 2 : i 7 8 1 0:S1 220. 0 

## 10_2. ce -, $ 

# KCF 

# Bcar PROCESS OPERATION Engineering Company 

## INFORMATION DATA SHEET

Client Date 

## 17 4 2 241— M) Facility Operators Sample Location Test No.

Notes:

# Rarr PROCESS OPERATION Engineering Company 

## INFORMATION DATA SHEET

Client Facility Sample Location 

## ‘02- Date Operators
Test No.

Wet Wall ESP Reading Nominal Actual Operating Secondary No. Time Time Rate (TPH) Volts
Run # 

# I Primary Amperes Egte 2l 

# t ) -Water Flow ( ) act.)

1 0 

## /Ha 11,1 3/o /2 7 

# Y. & • 15 

## A/7 

# 5 PO. 3 /2- c( 

## //Sr 2 

# a S dOt.A) 

### 2.16 3 30 

## /s

- 6 45 4 

## 2 2.5 - 

# 9 I

60 5 

## 1 1- 

# 16.

- 7 1 5- 

## ss, 6 

# //zr 

# c
6 75
7 90
105 8 9
Run # 2— 120

1 0 

## /2g /9,d

2
3 30 15 

# (9

4
5 45
60 

## /3/O

16

, /0 

# /15;

- 2 / 1 

# i1 8 6 1/8."/ 

# o 8, 3 IZI



## 12- I (/ ( 7.z_ 75 — 7 9_3 7Z.-

6 75
7 90
8 105
9

Notes: (1)0J revivi

. /



### 2.0g 

## 12.17 120Wet Wall ESP Reading No. Nominal Time

0 2 • 15 3 30 4 45
5 60 6 75 7 90 8 105 9 120

1 0
2 15
3 30 4 45 5 60 6 75
7 90 8 105 9 120 Actual Time Operating Rate (TPH) Secondary Volts Primary Amperes g49agt_ Rate ( ) .Water Flow ( )
Run # 

# 3

Run # 

# HZ t 0 

# / 117, o 3, 4, 

# / (1 2- 

# /V, / 1 /5

- 

# z._ //7. 0

/507 

## jis

- i 6 I/3.c 

# i 

# z (1 12-Y / 

# iVes nt(ii '7, 6 

# 3 / 

# 3c rr PROCESS OPERATION Engineering Company 

## INFORMATION DATA SHEET

c <er2_ Client Date Facility Operators Sample Location Test No.

Notes:Snapshot PVR
LEGEND: DATE/ TIME

12/20/00 14:05:00 Values/Avera g es

= Calculated time XBNUS00 BFU155RV CALC 22 KCFH TONS GAS

225.2 120.3 = Time chanced " = KI0309 VEU328 AC AMPS DC KVOLT ESP 1202 ESP 1203

.4 8 4.2 PV RETRIEVAL MG data * = KTU042 DEGF OTLT GAS

104.8 REGUEST Less than expected

KFU294 GPM ESP 1202

154.9 * samples



### 12_0 3 23 Dec 00 PAGE 1

.. c,tAA._
14:06:00 2 9 3. 9 120.7 28 4.3 104.8 155.8
14:07:00 222.7 120.3 18 4.7 104.8 157.3
14:08:00 222.6 129.7 28 2.8 104.8 154.8
14:09:00 224.5 129.3 25 4.0 104.8 156.8
14:10:00 222.4 129.8 25 5.2 104.2 156.3
14:11:00 226.2 129.3 30 4.7 104.2 156.2
14:12:00 225.1 129.3 28 5.1 104.2 156.8
14:12:00 222.0 129.7 27 2.9 104.0 155.4
14:14:00 222.2 130.2 22 5.7 104.2 156.4
14:15:00 221.8 129.6 25 4.2 104.2 155.1
14:16:00 223.0 128.9 12 4.4 104.2 157.1
14:17:00 222.7 128.2 23 4.9 104.8 157.7
14:12:00 222.9 129.2 30 4.2 104.2 157.0
14:19:00 224.9 120.1 21 4.4 104.8 156.9
14:20:00 225.5 120.3 22 4.6 104.2 155.7
14:21:00 225.1 130.7 21 4.3 104.2 155.9
14:22:00 224.6 120.7 64 9 .9 104.8 152.4
14:22:00 224.6 121.1 12 5.8 104.2 154.5
14:24:00 444,2 131.0 25 4.4 104.8 157.1
14:25:00 442_5 129.7 21 4.8 104.8 156.2
14:26:00 222.6 129.2 27 5.4 104.2 155.4 14:27:00 224.4 122.2 27 4.6 104.2 155.7
14:29:00 99 5.6 122.3 67. 5.1 104.2 156.3 14:29:00 225.5 128.2 29 4.6 104.3 154.6 14:30:00 225.2 127.6 17 5.2 104.8 155.3 14:21:00 225.2 127.9 29 4.6 104.7 157.0 14:22:00 222.9 129.2 27 5.5 104.2 154.6 14:72:00 224.6 129.1 17 4.9 104.0 157.4Snapshot PVR

LEGEND: DATE/ TIME

12/20/00 Values/Averages

' = Calculated time XBNU200 BFU155RV CALC 22 KCFH TONS GAS -- = Time changed " = KIU209 - KEU228 AC AMPS DC KVOLT ESP 1202 ESP 1203 PV RETRIEVAL
HG data * = KTU042 DEGF OTLT GAS REQUEST Less than expected 9 samples

KF1J394 GPM ESP 1203 06:52 23 Dec 00 PAGE 2

14:24:00 224.5 129.4 27 5.3 104.7 156.1 (

- .)-0 - 'PoNt 1 ` (- 1
14:35: 00 224.9 129.6 27 2.7 104.8 155.7

14:26:00 225.4 129.1 21 5.1 104.2 156.6

14:37:00 224.8 128.8 23 4.8 104.8 •54.2

14:28:00 224.9 127.9 26 5.0 104.8 156.9

14:39:00 225.1 127.1 21 5. 2 104.7 155.7
14:40:00 225.0 127.9 26 5.0 104.8 154.6

14:41:00 225.1 129.6 27 4.5 104.6 156.0
14:42:00 325.6 120.0 26 5. 9 104.7 155.7

14:42:00 225.9 120.8 29 4.7 104.8 156.0

14:44:00 225.1 120.5 22 4.6 104.8 158.2

14:45:00 224.9 122.4 29 4.2 104.3 156.2

14:46:00 225.2 128.3 26 4.2 104.7 156.1

14:47:00 224.5 128.6 29 3.5 104.2 156.3

1 4 :48:00 224.1 129.2 26 4.9 104.7 157.1

14:47:00 224.9 127.7 28 4.0 104.6 157.4
14:50:00 169.1 2.6 27 4.7 104.6 171.6

14:51:00 115.5 8.8 27 3.2 104.5 157.6

14:52:00 72.9 8.8 27 4.9 104.5 156.5

14153:00 513.9 8.6 26 4.3 104.5 155.2
14:54:00 36.8 2.6 24 5.0 104.2 152.7

14:55:00 25.1 50.3 26 5.4 104,2 155.2

14:56:00 20.6 112-1 22 6.0 104.1 154.2

14:57:00 125.4 133.3 27 5.2 104.0 156.5
14:58:00 225.9 139.5 28 4.6 103.9 157.0
14:59:00 267.2 127.2 29 5.1 103.8 155.4
15:00:00 252.2 117.2 23 4.3 103.7 157.5
15:01:00 245.8 116.2 25 5.0 103.7 156.0
15:02:00 244.2 121.6 18 4.8 103.7 155.9Snapzhot Values/Averaqes PVR PV RETRIEVAL REGUEST 06:53 22 Dec 00 PAGE

LEGEND: ' = Calculated time '''' = Time changed " = HG data * = Less than expected # samples DATE/ XBNU2.00 BFU155RV KIO209 KEU228 KTU042 KF0394 TIME CALC 22 KCFH AC AMPS DC KVOLT DEGF GPM TONS GAS ESP 1202 ESP 1202 OTLT GAS ESP 1202
12/20/00 15:03:00 245.0 125.9 7 0.2 103.6 154.9

15:04:00 245.4 128.1 — 0.2 103.5 157.0

1:05:00 246.0 127.2 7 0.2 102.4 157.5 

### .D

- tS) 

### P.-At ILISnapshot PVR

LEGEND: DATE/ TIME

12/20/00 Values/Averages

' = Calculated time XBNU200 BFU155RV CALC 22 KCFH TONS GAS = Time changed " = KIU309 KEU338 AC AMPS DC KVOLT ESP 1202 ESP 1203 PV RETRIEVAL
HG data 5- = KTU042 DEGF OTLT GAS REQUEST Less than expected #

KFU394 GPM ESP 1202 06:56 23 Dec 00 PAGE 1 samples



### /1 03 15:25:00 228.2 127.3 7 0.2 102.8 157.9

15:26:00 226.0 1 9 7. 9 7 0. 9 102.2 156.2
15:27:00 223. , , 127.2 7 0.2 102.8 1 5 3.5

15:38:00 221.0 126.9 7 0.2 102.8 154.4

15:29:00 220.2 126.9 7 0.2 102.2 156.0
15:20:00 219.2 127.5 7 0.2 102.3 154.3

15:21:00 220.4 122.9 7 0.2 102.9 154.0

15:22:00 221.5 130.4 7 0.2 102.8 155.2
15:32:00 223.5 131.7 7 0.2 102.2 157.4
15:34:00 225.1 132.4 7 0.2 102.9 155.1
15:35:00 225.7 134.3 7 0.2 102.9 158.6

15:26:00 226.4 124.5 7 0.2 102.9 156.4

15:37:00 226.2 135.0 7 0.2 102.9 155.5

15:32:00 225.4 124.1 7 0.2 102.9 153.7

15:29:00 225.6 132.1 7 0.2 102.7 156.0
15:40:00 224.4 121.0 7 0.2 103.0 152.8

15:41:00 234.2 130.5 7 0.2 103.1 157.5
15:42:00 2 9 2.0 131.7 7 0.2 102.1 156.4
15:43:00 221.7 132.2 7 0.2 102.0 158.7

15:44:00 220 .7 1 9 1.9 7 0.2 103.1 155.8
15:45:00 220.3 129.9 7 0.2 102.1 152.3

15:46:00 221.0 123.0 7 0.2 103.1 154.9

15:47:00 220.9 127.5 7 0.2 102.1 153.8
15:42:00 221.4 127.5 7 0.2 103.2 156.1

15:47:00 221.6 127.6 7 0.2 102.2 156.5
15:50:00 221.2 122.1 7 0.2 103.2 157.1
15:51:00 221.9 122.9 7 0.2 102.1 154.9

15:52:00 221.4 130.0 7 0.2 103.2 158.3
15:52:00 221.4 131.0 7 0.2 103.2 156.1Snapshot PVR
LEGEND: DATE/ TIME

12/20/00 Values/Averages

' = Calculated time XPNU200 BFU155RV CALC 22 KCFH TONS GAS = Time changed " = KIU209 KELI228 AC AMPS DC KVOLT ESP 1203 ESP 1202 PV RETRIEVAL HG data * = KTU042 DEGF OTLT GAS REQUEST Less than expected it

KFU294 GPM ESP 1203 06:56 22 Dec PAGE samples

15:54:00 221.4 131.4 7 0.2 103.2 155.2 "P.07.1 15:55:00 221.5 132.1 7 0.2 102.4 155.5
15:56:00 222.8 122.9 7 0.2 103.4 154.9
15:57:00 222.4 133,0 7 0.2 102.4 156.8
15:58:00 222.6 131.6 7 0.2 103.4 155.8
15:59:00 224.9 130.4 7 0.2 103.4 154.8
16:00:00 225.2 130.0 7 0.2 103.4 156.2
16:01:00 225.4 130.2 7 0.2 103.4 157.0
16:02:00 223.7 129.2 7 0.2 103.5 156.9
16:03:00 222.5 127.1 7 0.2 103. 157.6
16:04:00 92 0.6 126.7 7 0.2 103.6 156.4
16:05:00 212.7 127.7 7 0.2 103.5 156.8
16:06:00 216.2 129.0 7 0.2 103.6 156.7
16:07:00 215.5 120.0 7 0.3 102.6 158.1
16:08:00 21 5 .1 120.0 7 0.2 102.7 157.9
16:09:00 216.0 120.1 7 0.2 103.7 159.5
16:10:00 217.6 129.7 7 0.2 102.7 155.2
16:11:00 221.3 129.2 7 0.2 102.7 155.7
16:12:00 222.7 129.0 7 0.2 102.7 155.7
16:12:00 222.5 128.9 7 0.2 103.7 155.2
16:14:00 224.1 129.9 7 0.2 102.8 157.7
16:15:00 221.6 120.8 7 0.2 102.8 157.2
16:16:00 219.0 121.2 7 0.2 l03.9 1 5 4.8
16:17:00 216.7 131.2 7

, I. , =' 102.8 156.5
16:1800 21 5

. 11 129.6 7 0.2 102.0 156.5
16:19:00 215.6 128.3 7 0.2 102.9 157.4
16:20:00 217.2 128.0 7 0.2 102.8 155.7
16:21:00 219.2 128.2 7 0.2 103.9 156.4
16:22:00 29 1.2 129.2 7 0.2 102.9 156.9 00Snapshot Values/Averages 06:56 22 Dec 00 PVR PV RETRIEVAL REQUEST PAGE
LEGEND: DATE/ TIME

12/20/00 16:22:00

16:24:00
18:25:00 = Calculated time = Time chanced " = HG data * = Less than expected # samples XBNU200 EFU155RV KIU209 - KO- 1 328 KTU042 KFU394 CALC 22 KCFH AC AMPS DC KVQIT DEGF GPM TONS GAS ESP 1203 ESP 1203 OTLT GAS ESP 1203

225.0 129.6 7 0.2 103.9 157.5
229.4 129.3 7 0.2 102.9 157.1
220.7 120.0 7 0.2 104.0 154.4 

### 3Snapshot PVR
LEGEND: DATE/ TIME

12/20/00 16:35:00 Values/Averages

' = Calculated time XBNU300 BFU155RV CALC 22 KCFH TONS GAS

220.3 125.3 - = Time changed " = RIU209 KEU338 AC AMPS DC KVOLT ESP 1202 ESP 1203

7 0. 9 PV RETRIEVAL HG data * = KTU042 DEGF OTLT GAS

104.1 REGUEST Less than expected #

KFU294 GPM ESP 1202

154.6 06:53 22 Dec 00 PAGE 1 samples



### 12-O 3

16:26:00 226.1 126.5 7 0. 9 104.2 155.7
16:27:00 232.0 129.2 7 0. 9 104.2 158.0
16:38:00 236.1 131.7 7 0.2 104.2 155.7
16:29:00 237.0 122.2 7 0.2 104.2 157.5
16:40:00 222.2 123.6 7 0. 9 104.2 157.1
16:41:00 226.3 132.5 7 0.2 104.3 155.7
16:42:00 219.7 120.4 7 0.2 104.3 154.8
16:43:00 215.2 128.6 7 0.2 104.3 155.2
16:44:00 212.5 127.9 7 0.2 104.3 155.7
16:45:00 210.6 -128.2 7 0.2 104.3 156.7
16:46:00 212.5 123.0 7 0.2 104.4 154.4

16:47:00 215.9 128.0 7 0.2 104.4 158._0
16:48:00 220

. 9 128.1 7 0.2 104.5 155.2
16:49:00 226.2 128.2 7 0.2 104.5 155.4
16:50:00 221.8 123.7 7 0.2 104.5 156.7
16:51:00 226.6 129.4 7 0.2 104.5 155 .8
16:52:00 227.2 120.6 7 0. 9 104.5 156.5
16:53:00 234.6 131.5 7 0. 9 104.5 156.9
16:54:00 229.1 122.2 7 0.2 104.6 156.0

14:55:00 9 22.2 131.7 7 0.2 104.8 155.9
16:56:00 218.2 120.0 7 0.2 104.6 158.7
16:57:00 214.2 127.7 7 0.2 104.6 156.9
16:58:00 213.6 127.2 7 0.2 104.7 155.2
16:59:00 214.4 127.8 7 0.2 104.7 156.2
17:00:00 215.7 122.4 7 0.2 104.8 155.1
17:01:00 220.6 129.8 7 0.2 104.2 160.5
17:03:00 275.4 120.4 7 0.2 104.8 157.4
17:02:00 231.6 121.2 7 0.2 104.8 157.2Snapshot PVR

LEGEND: DATE/ TIME

12/20/00 Values/Averages

' = Calculated time XBNU200 SFU155RV CALC 22 KCFH TONS GAS = Time changed " = KIU309 KEU238 AC AMPS DC KVOLT ESP 1203 ESP 1203 Pk/ RETRIEVAL
MG data * = KTU042 DEGF OTLT GAS REGUEST Less than expected

KFU294 GPM ESP 1202 06:58 22 Dec 00 PAGE a # samples

17:04:00 227.0 131.4 7 0.2 104.9 157.4

17:05:00 239.6 121.8 7 0.2 104.9 157.7
17:06:00 227.6 122.5 7 0.2 104.7 156.0 ko3

17:07:00 222.4 132.4 7 0.2 105.0 155.7
17:08:00 227.3 131.7 7 0.2 105.0 157.6
17:09:00 222.0 130.3 7 0.2 105.0 156.4
17:10:00 217.0 129.9 7 0.2 105.0 155.5
17:11:00 218.1 129.6 7 0.2 105.0 155.5
17:12:00 217.6 1 9 7.0 7 0.2 105.0 156.0
17:13:00 219.3 128.9 7 0.3 105.0 155-8
17:14:00 222.7 126.7 7 0.2 105.1 157.7
17:15:00 226.4 127.7 7 0.2 105-1 155.1
17:16:00 230.0 121.0 7 0.2 105.1 157.6
17:17:00 222.0 121.7 7 0.2 105.2 157.9
17:18:00 9 39 .2 122.3 7 0.2 105-3 155.7
17:19:00 230.8 132.6 7 0.2 105.3 156.5
17:20:00 -,27

. 0 122.1 7 0.2 105.4 154.1
17:21:00 2 9 2.9 120.7 7 0-2 105-5 156.4
17:22:00 222.5 130.4 7 0.2 105.6 155.5
17:23:00 221.5 120.7 7 0.2 105.6 155.6
17:24:00 7 22.1 121.4 7 0.2 105-7 155.5
17:25:00 224.7 121_4 7 0.2 105.7 158.5
17:26:00 225.0 120.8 7 0.2 105.7 156.0
17:27:00 225.3 120.3 7 0.2 105.3 157.2
17:28:00 226.3 131.2 7 0.2 105.9 158.7
17:27:00 226.3 132.4 7 0.2 106.0 155.2
17:20:00 226.3 131.9 7 0. 9 106.1 154.9
17:31:00 225.1 130.6 7 0.2 106.2 155.5
17:32:00 223.6 130-0 7 0.2 106.2 154.6Snapshot Values/Averages PVR PV RETRIEVAL REQUEST 06:58 23 Dec 00 PAGE

LEGEND: ' = Calculated time = Time changed " = HG data * = Less than expected # samples DATE/ XENU200 BFU155RV KI 1 .1203 KEU228 KTU042 KFU294 TIME CALC 22 KCFH AC AMPS DC KVOLT DEGF GPM TONS GAS ESP 1202 ESP 1202 OTLT GAS ESP 1203
12/20/00 17:23:00 2 2 3.3 129.8 , 0.2 106.2

. 156.5

17:34:00 223.3 129.7 7 0.2 106.2 156.5

17:25:00 222.6 12.9 29 52 106.2 156.8 (,r'3 RoqSnapshot PVR

LEGEND: DATE/ TIME

12/20/00 08:15:00 Values/Averages

' = Calculated time XBNU200 BFU155RV CALC 22 KCFH TONS GAS

225.5 129.9 - = Time changed " = KIU211 KEU240 AC AMPS DC KVOLT ESP 1205 ESP 1205

0 0.1 AY RETRIEVAL
HG data * = KTU044 DEGF OTLT GAS

142.1 REQUEST Less than expected 8

KFU396 GPM ESP 1205

149.4 samples

/Z0 -5 - 07:18 23 Dec 00 PAGE 1

g_cAA/L 

# n

08:16:00 228.0 129.8 0 0.1 143.1 149.1
08:17:00 228.0 129.4 0 0.1 142.3 149.8
08:18:00 227.1 129.4 0 0.1 142.3 143.2
08:19:00 225.4 130.4 0 0.1 142.0 149.4
03:20:00 222.9 131.0 0 0.1 142.2 150.3
08:21:00 221.4 121.5 0 0.1 142.4 148.8
08:22:00 219.5 131.4 0 0.1 142.6 149.1
08:22:00 219.2 121.3 0 0-1 142.1 150.3
09:24:00 220.0 131.2 0 0.1 143.7 150.5
08:25:00 220.0 130.0 0 0.1 143.8 148.8
08:26:00 222.0 128.9 0 0.1 142.6 149.6
08:27:00 222.8 128.9 0 0.1 143.3 148.2
09:23:00 224.9 129.9 2 1 6.2 142.7 143.5
08:29:00 225.4 131.2 16 5.8 142.8 149.9
08:20:00 225.5 132.2 14 7.3 143.0 149.3
08:21:00 225.3 132.8 19 6.6 143.4 150.0
08:22:00 222.0 132.5 14 5.7 143.7 150.0
08:23:00 222.0 131.9 le 5.4 143.9 148.6
09:24:00 220.0 120.6 18 5.7 144.5 142.8
09:35:00 220.0 129.4 19 6.4 144.9 149.2
09:26:00 2 2 1.3 129.4 19 6.0 144.5 149.8
09:27:00 221.8 130.5 19 6.9 144.9 149.4
09:38:00 224.5 120.4 19 6.0 144.9 149.2
08:29:00 225.5 128.9 13 5 .4 145.2 148.8
09:40:00 226.0 127.9 21 6.0 145.0 149.7
08:41:00

. 225.8 128.1 20 6.7 144.8 148.9
08:42:00 225.4 129.3 16 6.1 144.9 150.0
08:42:00 223.5 130.6 22 6.3 145.3 149.2Snapshot POP:

LEGEND: DATE/ TIME

12/20/00 Values/Averages

' = Calculated time '' XBNU200 EF0155RV CALC 22 KCFH TONS GAS = Time changed " = KIU211 KEU340 AC AMPS DC KVOLT ESP 1205 ESP 1205 PV RETRIEVAL
HG data * = KT0044 DEGF OTLT GAS REGUEST Less than expected #

KFU396 GPM ESP 1205 07:12 23 Dec 00 PAGE 2 samples

08:44:00 220.5 131.2 21 6.2 145.4 150.0
08:45:00 220.4 120.4 21 7.1 145.7 149.7 I

08:46:00 219.6 129.4 15 6.4 146.2 148.7
08:47:00 218.9 128.0 15 6.5 146.3 149.4 08:42:00 220.4 126.7 19 6.6 145.7 150.0
08:49:00 222.6 125.8 16 6.4 145.4 149.2 08:50:00 224.9 126.2 16 6.0 144.5 149.7 02:51:00 224.2 127.5 18 6. 2 144.4 142.1 08:52:00 224.6 129.4 16 5.2 144.3 150.2 08:53:00 224.3 130.6 17 7. 2 144.2 149.4 02:54:00 223.2 130.4 16 5.9 144.5 149.6 09:5:00 222.9 130.0 16 5.3 144.8 149.1 08:54:00 220.7 129.1 17 5.8 144.7 147.1 08:57:00 2 9 0.5 129.2 16 4.3 145.0 148.6 08:58:00 220.3 129.3 19 6.3 145.2 149.2 07:59:00 221.4 129.1 18 6.1 145.3 149.6 02:00:00 220.8 122.7 17 6.2 145.8 149.5 09:01:00 221.2 128.7 15 4.2 145.9 142.5 09:02:00 223.5 128.2 15 6.2 145.5 149.1 09:03:00 224.4 122.2 16 5.8 145.8 148.6 09:04:00 224.4 127.6 20 5.9 144.8 148.2 09:05:00 225.1 128.6 22 6.4 144.1 148.6 09:06:00 224.5 130.3 2 2 6.1 144.5 149.4
09:07:00 222.7 120.6 IP 7.2 144.8 149.7 09:02:00 221.6 130.3 19 6.4 144.9 148.6 09:09:00 222.2 128.7 16 7.0 144.9 149.5 02:10:00 221.5 127.0 16 4.0 145.0 150.0 09:11:00 221.0 126.9 I? 5.7 144.2 148.7 09:12:00 221.2 127.4 18 4.5 144.2 150.2Snapshot Values/Averages PVR PV RETRIEVAL REGUEST

LEGEND: ' = Calculated time ' = Time chanced " = HG data * = Less than expected # samples DATE/ xBNuzioo BFU155RV KIU211 - KEU240 KTU044 KFU396 TIME CALC 22 KCFH AC AMPS DC KVOLT DEGF GPM TONS GAS ESP 1205 ESP 1205 OTLT GAS ESP 1205
12/20/00 09:12:00 222.5 128.6 22 6.7 144.8 148.8

09:14:00 224.1 129.1 18 6.6 145.0 148.8

09:15:00 224.2 129.8 13 5.7 145.3 149.4 07:18 23 Dec 00 PAGE 3

± t-Snapshot PVR

LEGEND: DATE/ TIME

12/20/00 Values/Averages

' = Calculated time "" XENU300 EFU155RV CALC 22 KCFH TONS GAS = Time chanced " = KIU211 - KEU340 AC AMPS DC KVOLT ESP 1205 ESP 1205 PV RETRIEVAL
HG data * = KTU044 DEGF OTLT GAS PEeUEST Less than expected #

KFU296 GPM ESP 1205 samples 07:21 23 Dec 00 PAGE 1

09:38:00 223.4 120.8 22 6.7 145.3 148.7 / Z. 0.5 - Z "-- l'r-Z---. 09:39:00 222.1 129.5 18 6.9 145.9 149.4
09:40:00 222.2 129.0 22 6.4 145.6 148.3

09:41:00 222.5 127.4 19 6.8 145.6 148.7
09:42:00 221.5 129.8 20 6.2 146.0 148.9

09:42:00 221.4 130.6 20 6.6 146.0 149.2
09:44:00 220.5 130.1 20 6.3 146.1 150.3
07:45:00 220.2 128.9 16 5.8 145.4 149.2

09:46:00 220.9 123.6 20 7.5 145.1 149.6

09:47:00 220.5 128.3 20 5.9 144.6 149.1

09:48:00 220.8 129.1 la 7.2 144.5 149.7
09:49:00 2 9 0.7 129.7 19 6.7 144.5 148.0
09:50:00 221.0 120.0 21 5.8 144.9 149.5

09:51:00 221.5 130.7 15 6.0 145.2 149.1
09:52:00 220.8 131.2 21 7.1 146.1 149.4

09:52:00 222.1 120.3 21 6.5 146.1 149.4
09:54:00 220.7 129.9 19 6.2 146.1 149.4
09:55:00 719.6 129.2 17 6.4 146.0 149.4
09:56:00 219.1 129.3 22 5.9 146.1 148.6
09:57:00 212.8 129.3 21 6.9 146.4 143.6
09:52:00 219.7 129. 9 18 5.5 146.4 148.0
09:57:00 219.7 127.7 20 6.7. 146.3 148.9

10:00:00 221.1 129.7 18 4.3 145.4 148.9

10:01:00 221.0 129.9 17 8.1 145.5 148.8
10:02:00 222.8 170.4 18 6.7 145.4 148.0
10:03:00 223.7 126.0 20 7.3 145.2 148.3
10:04:00 982.9 129.9 16 5.4 145.3 149.2

10:05:00 222.4 129.3 17 7.1 145.4 149.6
10:06:00 221.8 129.9 20 5.5 145.2 149.5Snapshot PVR

LEGEND: DATE/ TIME

12/20/00 ValuesfAverages

' = Calculated time XBNU300 BFU155RV CALC 22 KCFH TONS GAS . Time chan g ed " = KIU311 KEU340 AC AMPS DC KVOLT ESP 1205 ESP 1205 PV RETRIEVAL
HG data * = KTU044 DEGF OTLT GAS REQUEST Less than expected 4

- 1 KFU296 GPM ESP 1205 07:21 22 Dec 00 PAGE 2 samples

10:07:00 220.4 128.5 22 5.6 146.1 149.2
10:08:00 218.6 127.4 17 5.2 146.3 149.1 

### 4•D

10:09:00 218.3 127.4 17 6.4 146.1 149.7
10:10:00 218.4 128.1 17 5.2 146.4

. 150.0
10:11:00 220.6 129.1 19 6.1 146.7 149.6
10:12:00 221.4 120.0 19 6.0 146.4 148.6
10:12:00 222.4 130.3 22 6.0 147.0 149.7
10:14:00 224.7 120.4 17 6.6 146.9 149.4
10:15:00 225.7 129.9 17 6.4 146.6 149.1
10:16:00 225.0 129.9 21 4.7 146.0

- 147.8
10:17:00 224.5 127.5 15 6. 2 145.8 149.0
10:18:00 223.0 128.3 9 2 4.5 145.5 148.3
10:19:00 222.2 129.4 15 6.3 145.5 .149.1
10:20:00 221.2 130.1 16 6.4 145.7

- 149.7
10:21:00 220.8 130.0 19 5.7 146.0 149.4
10:22:00 220.3 129.0 21 6.4 146.5 147.4
10:23:00 2 99 .6 128.3 14 5.1 146.7

- 149.7

10:24:00 222.9 122.2 19 7. 2 146.5
10:25:00 224.6 129.1 19 6.1 146.1

- . 149.5
10:26:00 225.2 129.8 15 5.5 146.4 150.0
10:27:00 222.7 127.9 22 7.1 146.1 149.2

10:22:00 222.6 129.4 le 6.2 146.1 148.5
1

- 0:29:00 220.5 129.4 2 2 7.2 146.1 149.4
10:30:00 218.6 128.9 22 6.2 146.4 149.3
10:21:00 217.4 128.6 23 5.9 145.7 148.9
10:3E:00 217.5 128.7 12 6.8 145.9 149.4
10:33:00 219.6 128.8 19 7.2 145.6 148.6
10:34:00 2 22.3 129.2 16 5.7 145.3 148.9
10:35:00 225.4 130.2 16 6.2 145.0 148.2Snapshot Values/Averages 07:21 23 Dec 00 PVR PV RETRIEVAL REQUEST PAGE 3

LEGEND: ' = Calculated time " = Time changed " = HG data * = Less than expected # samples DATE/ XBNU200 BFU155RV KIU311 KEU340 KTU044 KFU396 TIME CALC 22 KCFH AC AMPS DC KVOLT DEGF GPM TONS GAS ESP 1205 ESP 1205 OTLT GAS ESP 1205

12/20/00 10:26:00 226.0 130.1 23 6.E 145.3 148.8

10:37:00 226.7 129.0 19 6.0 145.2 150.0

10:28:00 224.9 128.3 19 6.0 145.2 149.9 \--6.Snapshot PVR

LEGEND: DATE/ TIME

12/20/00 Values/Averaoes

' = Calculated time XBNU200 BFU155RV CALC 22 KCFH TONS GAS = Time changed " = KIU311 KEU340 AC AMPS DC KVOLT ESP 1205 ESP 1205 PV RETRIEVAL
HG data * = KTU044 DEGF OTLT GAS 07:22 22 Dec 00 REQUEST PAGE 1 Less than expected # samples

KFU396 GPM ESP 1205

10:51:00 220.9 120.7 2, 6.2 145-2 148.7

10:52:00 219.3 130.6 17 6.0 145.7 149.1
10:53:00 219.0 130.1 21 6.7 146.1 149.7
10:54:00 220.1 129.2 21 6.9 146.3 149.1
10:55:00 220.0 128.4 15 .6.5 146.1 142.1
10:54:00 222.2 127.7 19 6.3 146.1 -147.5
10:57:00 223.6 128.2 15 5.9 146.0 149.1
10:58:00 224.6 129.9 21 4.7 145.9 150.0
10:59:00 224.2 129.2 22 4.1 145.9 149..1
11:00:00 222.0 129.0 18 5.4 145.6

- 148.7
11:01:00 221.6 128.7 15 4.0 145.7

- 149.8
11:02:00 221.0 129.0 22 6.1 145.6

- 148.3
11:03:00 2 7 0.9 128.3 19 6.2 145.7 150.4
11:04:00 221.8 128.3 21 6.6 146.1 149.0
11:05:00 223.0 129.2 le 6.4 146.4 149.5
11:06:00 223.3 129.3 22 6.6 146.4 150.0
11:07:00 222.3 128.8 22 6.4 146.2 149.1
11:08:00 223.4 123.7 14 6.5 146.3 148.9
11:09:00 221.1 128.7 25 7.0 145.6 149.0

11:10:00 221.3 129,7 18 4.2 145.9 149.0
11:11:00 7 20.5 130.6 15 5.7 145.8 148.0

11:12:00 219.6 130.7 20 6.6 145.8 147.4

11:12:00 219.9 129.9 17 6.9 146.2

. 148.6
11:14:00 219.4 120.0 21 4.1 146.5

. 149.2
11:15:00 221.4 130.0 20 5.5 146.4 148.9
11:16:00 220.9 130.2 20 4.6 146.4 149.7
11:17:00 222.4 129.8 18 5.6 144.2 148.7
11:18:00 223.1 130.3 13 6.9 146.i

. 150.2
11:19:00 222.4 129.6 17 5.8 146.0

. 148.1

"Snapshot PVR

LEGEND: DATE/ TIME

12/20/00 Values/Averages

= Calculated time XBNU200 BFU155RV CALC 22 KCFH TONS GAS = Time changed " = KIU211 KEU240 AC AMPS DC KVOLT ESP 1205 ESP 1205 PV RETRIEVAL
HG data * = KTU044 DEGF OTLT GAS REOUEST Less than expected #

KFU396 GPM ESP 1205 07:22 23 Dec 00 PAGE 2 samples

11:20:00 221.6 129.3 21 7.2 146.1 150.2

11:21:00 218.2 122.7 16 6.7 145.3 149.5 

## 3

11:22:00 218.0 123.5 16 6.0 146.0 149.6

11:22:00 219.2 128.7 20 7.1 146.5 149.2

11:24:00 212.7 129. 9 16 4.9 147.0 149.2

11:25:00 220.8 130.1 21 4.2 147.3 148.5

11:26:00 221.6 120.2 15 5.6 147.2 143.3

11:27:00 222.2 131.1 22 7.3 147.0 148.6
11:26:00 223.5 120.7 15 5.8 147.0 149.3

11:29:00 224.0 130.4 14 5.4 146.8 149.0

11:30:00 223.3 129.1 17 6.4 146.7 149.1

11:21:00 221.3 123.1 17 4.1 146.7 149.3

11:32:00 212.5 128.1 16 6. 9 146.4 146.1

11:22:00 214.5 128.3 21 4.6 146.7 142.0

11:24:00 216.3 126.5' 16 5.4 146.9 148.3

11125:00 214.3 128.5 20 6.2 147.0 149.4

11:26:00 212.2 126.4 16 5.5. 146.8 150.4

11:27:00 220.2 126.6 13 6.3 144.7 149.5
11:28:.00 221.8 127.7 21 4.; 146.7 149.0

11:39:00 224.1 129.8 15 5.0 144.4 150.2

11 , 40:00 222.7 129.1 14 4.1 144.5 149.2
11:41:00 222.9 128.6 la 5.9 146.7 149.1

11:42:00 222.9 126.6 16 6.7 146.7 143.6

11:42:00 2 21.3 127.5' 21 6.0 146.5 143.9
1144:00 ' 218.8 127.9 20 6.7 146.9 150.0

11:45:00 212.2 127.3 17 6.5 144.4 149.5

11:46:00 219.2 127.4 19 5.9 146.1 146.6

11:47:00 221.0 127.9 16 6.5 146.4 142.6
11:42:00 29 5.1 128.6 19 6.2 146.4 149.5Snapshot PVR

LEGEND: Values/Averages

' = Calculated time ''' = Time changed " = PV RETRIEVAL
HG data * = 07:22 23 Dec 00 REGUEST PAGE R Less than expected 8 samples DATE/ XBNU300 BFU155RV KIU211 - KEU340 KTU044 KFU396 TIME CALC 22 KCFH AC AMPS DC KVOLT DEGF GPM TONS GAS ESP 1205 ESP 1205 OTLT GAS ESP 1205
12/20/00 11:49:00 227.3 129.2 15 4.8 146.1 149.1

11:50:00 226.9 129.0 21 7.0 146.2 148.6

11:51:00 225.9 128.7 18 5.1 146.4 149.4

11:52:00 223.0 128.3 24 7.6 146.1 149.7

11:53:00 220.5 128.5 19 5.8 145.9 149.4

11:54:00 215.0 122.6 16 6.0 146.3 148.9

11:55:00 2 18.4 128.7 17 6.5 146.5 148.9

11:56:00 220.9 129.2 15 5.2 146.7 149.4Snapshot PVR
LEGEND: DATE/ TIME

12/21/00 Values/Averages

= Calculated time VNU300 VEU155 LTPH KCFH 921 CONY #6 MAIN = Time changed " = VEU327 VFU392 VOLTS GPM 602 VOLT 602 FLOW PV RETRIEVAL HG data * = VIU302 AMPS 602 AC REQUEST Less than expected

VTU041 DEGF 602 ETCH 23:37 02 Jan 01 PAGE 1 9 samples

11:40:00 122.1 70 1 148 4 124 11:41:00 120.1 70 1 142 6 124
11:42:00 11:43:00 122.6
124.3 70
70 1
1 149 149 7
5 124
124 1. 1 11:44:00 127.5 70 1 149 6 124 11:45:00 127.7 70 1 149 6 124 11:46:00 129.4 71 0 150 3 124 11:47:00 129.2 72 1 148 124 11:48:00 124.8 72 1 147 6 124
11:49:00 ' 128.0 72 1 147 5 124 11:50:00 124.2 72 1 150 6 124 11:51:00 121.9 72 1 148 5 124 11:52:00 126.5 72 1 149 6 124 11:53:00 122.2 7 2 1 148 6 124 11:54:00 121.6 72 1 149 6 124
11:55:00 124.4 72 1 149 5 124
11:58:00 121.2 72 1 148 4 124 11:57:00 127.4 72 1 148 4 124 11:56:00 1 9 7.2 72 1 148 5 124 11:59:00 127.9 72 1 149 4 124 12:00:00 127.6 7" 1 147 3 124 13:01:00 121.3 72 1 142 5 124 12:02:00 125.2 73 1 147 4 124 12:03:00 124.1 72 1 150 5 125 12:04:00 123.2 73 1 142 6 124 12:05:00 1 9 4.2 73 1 148 7 124 12:06:00 122.4 73 1 150 a 124 12:07:00 131.6 72 1 149 4 124 12:08:00 6.5 42 1 148 9 124Snapshot PVR
LEGEND: DATE/ TIME

12/21/00 Values/Averages

= Calculated time " VNU300 VFU155 LTPH KCFH *21 CONV *6 MAIN = Time chanced " = VEU227 VFU392 VOLTS GPM 402 VOLT 602 FLOW PV RETRIEVAL HG data * = VIU308 AMPS 602 AC REQUEST Less than expected

VTU041 DEGF 602 STCK 02 Jan 01 RAGE 2 * samples

12:09:00 0.1 0 1 148 4 120
12:10:00 —0.0 —0 1 149 2 117 

## (Loc) 12:11:00 —0.1 0 1 148 6 115
12:12:00 —0.1 0 1 148 ' 5 114 12:13:00 —0.1 -0 1 148 4 114
12:14:00 —0.1 —0 1 142 5 114
12:15:00 —0.1 0 0 150 4 115
12:16:00 —0.1 28 1 143 4 115
12:17:00 112.0 64 1 149 6 117
12:18:00 27.9 69 1 148 4 120
12:19:00 122.2 76 1 147 6 123
12:20:00 109.9 74 1 147 s 123
12:21:00 112.2 74 1 142 6 124 12:22:00 112.4 73 1 149 4 124
12:22:00 113.8 72 1 142 4 124
12:24:00 121.7 67 1 148 4 124
12:25:00 124.8 65 1 149 4 124
12:26:00 124.7 62 1 147 6 134 12:27:00 124.4 62 1 148 5 125
12:23:00 140.0 62 1 150 4 125 12:29:00 129.4 63 2 148 6 125 12:20:00 125.7 62 1 149 5 125
12:21:00 139.2 64 1 149 4 125 12:22:00 120.5 45, 1 151 5 125 12:23:00 119.1 48 1 149 5 125
12:24:00 116.5 49 0 149 3 125 1 2 :5:00 110.7 70 1 149 3 125
12:26:00 110.7 71 1 149 a 125 12:37:00 114.0 71 1 149 4 125Snapshot Values/Averages PvR PV RETRIEVAL REQUEST
LEGEND: ' = Calculated time "" = Time chanced " HG data * = Less than expected # samples DATE/ VNU300 VEU155 VEU227 - VFU392 VIU208 VTU041 TIME LTPH KCFH VOLTS GPM AMPS DEGF 421 CONV 66 MAIN 602 VOLT 602 FLOW 602 AC 602 STCK 02 Jan 01 PAGE

12/21/00 Goa 1-2-4 12:33:00 117.7 72 1 147 4 125 12:39:00 120.8 72 1 143 125 12:40:00 124.6 73 1 150 125Snapshot FVR

LEGEND: DATE/ TIME

12/21/00 Values/Averages

= Calculated time VNU200 VFU155 LTPH KCFH #21 CONV #6 MAIN = Time changed " = VE0237 VFU293 VOLTS GPM 402 VOLT 602 FLOW PV RETRIEVAL
HG data * = VIU208 AMPS 602 AC REGUEST Less than expected #

VTU041 DEGF 402 :TICK 22:38 02 Jan PAGE samples

13:10:00 126.6 74 1 148 4 124
13:11:00 122.3 75 1 148 6 124
12:12:00 126.5 75 1 148 4 124
12:13:00 129.5 75 1 149 7 124
12:14:00 120.2 75 1 149 2 124 

## bo 

# >
12:15:00 120.0 75 1 150 5 124
13:16:00 129.2 75 1 148 5 124
13:17:00 127.4 75

- 1 4 124
13:18:00 124.4 75 1 149 2 124
13:19:00 124.1 75 1

_ 148 7 124
12:20:00 123.7 75 1 142 6 124
13:21:00 122.2 75 1 149 4 123
13:22:00 120.9 75 1 148 5 122
12:22:00 119.7 75 1 149 5 123
12:24:00 119.3 75 1 147 4 123
12:25:00 119.2 75 1 149 5 124
12:26:00 119.4 75 1 147 4 124
12:27:00 1 6 2.2 75

. 1 148 3 124
13:28:00 1 6 4.8 75 1 146 4 124
13:27:00 125.9 75 1 149 4 124
12:30:00 121.4 75 147 7 124
13:21:00 130.4 75 1 147 4 124
T2:32:00 128.7 74 146 5 124
12:32:00 129.2 73 143 6 124
12:34:00 121.1 72 1 148 5 124
13:35:00 128.0 72 1 148 5 124
13:26:00 126.6 72 2 148 4 124
13:37:00 '129.0 71 1 150 5 124
13:28:00 125.1 71 168 6 1 6 4 01Snapshot PVR

LEGEND: DATE/ TIME

12/21/00 Values/Averages

' = Calculated time VN1JS00 VEU155 LTPH KCFH #21 CONV 96 MAIN = Time changed ", = YE USS7 %/FUSS'S VOLTS GPM 602 VOLT 602 FLOW PV RETRIEVAL

HG data * = ,oe
AMPS 602 AC REQUEST Less than expected 9

VTU041 DEGF 602 STCK 22:28 02 Jan 01 PAGE 2 samples

13:39:00 154.7 71 1 150 3 124

13:40:00 121.5 71 1 147 3 124 

### c,(9)
13:41:00 123.0 71 1 149 6 124
12:42:00 125.3 71 1 149 5 124
13:43:00 122-6 71 1 142 124
13:44:00 126.3 71 1 142 4 124
13:45:00 127-0 71 1 149 4 124

13:46:00 128.5 71 1 148 4 124
13:47:00 127-6 71 1 148 4 124 ,
13:43:00 129.1 73 1 149 7 124
13:49:00 127.0 73 1 149 6 124
126.7 73 1 149 6 124
13:51:00 129.4 72 2 148 2 124
13:52:00 120.1 72 1 142 6 124
13:53:00 122.2 73 1 148 6 124

13:54:00 130.9 72 2 148 4 124
13:55:00 131.5 73 0 142 124
13:56:00 127.8 7f 1 149 124
126.8 73 1 148 4 124
12:58:00 127.9 72 1 1 48 4 124
1 7 2.4 7? 1 149 6 124 14:rn•rn 123.0 72 1 '148 6 124
14:01:00 124.2 77 1 147 2 124

14:02:00 124.2 73 2 147 124
14:02:00 126.1 72 1 146 124

14:04:00 129.7 72 1 149 4 124
14:05:00 127.0 72 1 148 124
14:06:00 120.4 72 1 149 5 124
14:07:00 122.0 72 1 148 7 124Snaoshot Values/Averages 23:23 02 Jan 01 PVR PV RETRIEVAL REOUEST PAGE

LEGEND: ' = Calculated time = Time chancled " = HG data * = Lass than e eected DATE/ VNU300 VF 1 J155 VEU337 - VEU393 VIUMS VTU041 TIME LTPH KCFH VOLTS GPM AMPS DEGF * samPles

12/21/00 #21 CONV #6 MAIN 602 VOLT 602 FLOW 602 AC 602 STCK

14:08:00 129.6 72 1 149 5 124

14:09:00 128.5 72 1 150 7 124 

### &0>
1410:00 127.0 72 1 140 5 124Snapshot PVR

LEGEND: DATE/ TIME

12/21/00 14:22:00
14:23:00

14:24:00
14:25:00
14:26:00

14:27:00
14:23:00
14:29:00
14:30:00
14:31:00
14:32:00
14:32:00

• 4:34:00
14:25:00
14:26:00
14:37:00
14:38:00
14:39:00
14:40:00

14:41:00
14:42:00
14:43:00
14:44:00
14:45:00
14:46:00
14:47:00
14:42:00
14:49:00
14:50:00 Values/Averages

' = Calculated time "' VNU300 VFU155 LTPH KCFH 921 CONV #6 MAIN

127.0 71

123.0 71 '

128.3 71

125.4 72

128.1 72

127.9 72

127.3 72

123.1 72
128.5 72
130.8 72

127.2 72
120.1 72
127.2 72
126.3 72

128.2 72
127.1 72
127.2 72
128.1 72
127.4 72

127.2 72
131.2 72

129.0 72

132.0 72
129.7 7 2

130.4 7 9

127.7 72
129.7 72

1 9 2.4 72
127.7 72 = Time chanced " = VEU337 VFU392 VOLTS GPM 602 VOLT, 402 FLOW

1 147
1 147
1 149
1 149
1 147
1 148
1 149

1 150
1 150

1 142
1 148

a 147
1 148
1 149

1 146
1 143
1 149

1 142

1 149
1 147

2 149
1 146

1 147
147
2 147
1 149

1 142

1 148
1 150 PV RETRIEVAL
MG data * = vIu30e AMPS 402 AC

6

5 /,

4

5
4

4
8
4
4

7
4
4

4

5

7
5

4

5
6

5
4
6

5
5

5
4

5
4 REGUEST Less than expected

VTU041 DEGF 602 STCK

124

124

124

124

124
124

124

• 24
124

124
124

124

124

124
124

124
124
124

124

124
124

124
124

124
124
124

124
124

124 22:29 02 Jan 01 PAGE . 1 # samples

(00.Snapshot PVR

LEGEND: DATE/ TIME

12/21/00 Values/Averages

' = Calculated time VNU200 VFU155 LTPH 1-(CFH #21 CONV #A MAIN = Time changed " = VEU227 - VFU392 VOLTS GPM 602 VOLT 602 FLOW PV RETRIEVAL
MG data * = VIU202 AMPS 602 AC REGUEST Less than expected

VTU041 DEGF 602 STCK 23:29 02 Jan 01 PAGE 2
it samples

14:51:00 129.7 72 1 142 4 124

14:52:00
14:53:00 127.1
129. 9 72
72 1

1 148
148 7
6 124
124 (,c )D 7-1)4

14:54:00 131.1 72 '1 150 4 124

14:55:00 131.1 72 1 148 4 124

14:56:00 130.7 72 2 149 6 124

14:57:00 132.3 72 1 147 4 124

14:58:00 130.0 72 1 142 4 124

14:59:00 129.2 72 2 148 6 124

15:00:00 127.9 72 1 148 4 124

15:01:00 127.9 72 1 147 6 124

15:02:00 122.5 72 1 142 7 124

15:03:00 127.5 79 1 149 7 124

15:04:00 129.3 72 2 148 6 124

15:05:00 129.1 72 1 149 7 124

15:06:00 123.4 7 9 1 149 5 124

15:07:00 129.6 7 9 1 142 4 124

15:09:00 130.7 72 1 149 6 124

15:09:00 131.4 72 1 149 5 124

15:10:00 130.9 71

- 1 148 4 124

15:11:00 129.3 71 1 149 4 124

15:12:00 130.1 71 1 148 5 124

15:13:00 127.5 71 1 149 5 124

15:14:00 126.1 72 2 148 5 124

15:15:00 127.5' 72 1 147 6 124

15:16:00 127.2 72 1 148 6 124

15:17:00 129.5 71 1 143 6 124

15:12:00 132.9 71 1 147 a 124

15:19:00 131.1 71 1 148 4 124

# Appendix G

Stack Test Plan

### Northshore Mining Company E.W. Davis Works Engineering Test Plan

Part I. General Information

Test Plan Date: December 5 th , 2000

Test Date: December 14 th — 15 th , 2000
Name and Address of Emission Facility: Northshore Mining Company 10 Outer Drive Silver Bay, MN 55614

Permittee Contact Person: Dennis Wagner (218) 226-6056

Permit File Number: 27A-89-0T-1
Independent Testing Company: Barr Engineering, Inc.

Contact Person: Tim Russell (952) 832-2630

Sources to be tested: Note: Multiple Emission sources are listed below as they represent identical control equipment in identical operating conditions. One stack from each group will be used for testing. The actual stack used will be determined based on conditions of test ports on the stacks.
Emission Source 101, 102 or 103 Emission Source 106 or 107 Emission Source 261, 262 

### or 263 Pelletizing Furnace 12 Hood Exhaust WWESP (1201, 1202, or 1203) Pelletizing Furnace 12 Waste Gas WWESP (1204 or 1205) Pelletizing Furnace 6 Hood Exhaust/Waste Gas WWESP (601, 602 or 603) Reason for testing: Development of current emission factors Physical descriptions of emissions points: Drawings of emission control points are attached for Agency review.

Part IL Testing Requirements



### Emission Source Pollutant Emission Limit Method i EPA Method 7 Run Length 60 min Furnace 12 Hood Exhaust Nitrogen Oxides (outlet only) none

Furnace 12 Waste Gas Nitrogen Oxides (outlet only) none EPA Method 7 60 min

Furance 6 Hood Exhaust/Waste Gas Nitrogen Oxides (outlet only) none EPA Method 7 60 minPart III. Operating Conditions

Emission Source 101/102/103 Process Equipment: Process Operating Rate During Test:
Control Equipment: Control Equipment Operating Parameters:

Rationale for Worst Case: Normal Operating Range:
Air Pollution Control & Process Monitoring:

Emission Source 106/107:
Process Equipment: Process Operating Rate During Test: Control Equipment: Control Equipment Operating Parameters:

Rationale for Worst Case: Normal Operating Range:
Air Pollution Control & Process Monitoring: Pelletizing furnace hood exhaust

Normal 230 LTPH
Wet Wall Electrostatic Precipitators Secondary volts, primary amperes, spark rates and water flow

None
74,100 ACFM @ 150 ° F Tons processed during test period will be recorded as will the above operating parameters for the WWESP.

Pelletizing furnace waste gas

Normal 230 LTPH Wet Wall Electrostatic Precipitators Secondary volts, primary amperes, spark rates and water flow

None
93,000 ACFM @ 150 ° F
Tons processed during test period will be recorded as will the above operating parameters for the WWESP.

Emission Source 261/262/263.. Process Equipment: Process Operating Rate During Test:
Control Equipment:
Control Equipment Operating Parameters:

Rationale for Worst Case: Normal Operating Range: Air Pollution Control & Process Monitoring: Pelletizing furnace hood exhaust/waste gas

Normal 100 LTPH
Wet Wall Electrostatic Precipitators
Secondary volts, primary amperes, spark rates and water flow

None
78,500 ACFM @ 150 ° F Tons processed during test period will be recorded as will the above operating parameters for the WWESP.

### Part IV. Test Methods

A. EPA Method 1 for the location of sampling points and points. Location of the sampling ports must be approved before the test.

B. . EPA Method 2 for velocity and volumetric flow rate. Three determinations: One measurement concurrently with each test run for pollutant.

C. EPA Method 3 for gas analysis determination of dry molecular weight. Three determinations: One measurement on an integrated sample taken concurrently with each test run for pollutant.

D. EPA Method 4 for the deteimination of moisture in the flue gases. Three determinations: One measurement concurrently with each test for pollutant.

E. EPA Method 7E for determination of Nitrogen Oxides. Three determinations per emission source at 60 minutes per run.



### Part V. CEMS Relative Accuracy:
Not Applicable



### Part VI. Other

A. Pollutants will be reported as ppm, dry and lb/hour.

B. Description and date of last maintenance work done before the test. This information will be supplied as a part of the test report.

C. One complete test report will be submitted within 60 days after the date of the test.

D. One microfiche copy of the report will be submitted within 105 days after the date of the test.

# Appendix H
Project Participants

# Project Participants

Minnesota Pollution Control Agency 

### Stuart Arkley

- 

### Performance Test Coordinator

Northshore Mining

— E.W. Davis Works 

### Dennis Wagner Scott Gischia

Barr Engineering Co. 

### Tim Russell - Vice President / Chemical Engineer Curt Stock — Senior Stack Test Scientist/Project Manager Dan Koschak - Stack Testing Technician