# Results of the Title VIMACTResetPerformance Tests on December 8, 

# 10, 15, 

# and 16, 

# 2009 at United Taconite, LLC.

- Processing Facilities Located in Forbes, Minnesota

Line 1 

# Pellet CoolerExhaust (SV047) 

# Line2A Waste Gas (SV048) 

# Line2B Waste Gas (SV049) 

# Line 1 

# Kiln CoolerDischargeNew (SVl16)



# MPCA AQD FileNo. 869A AirEmissions PermitNo. 13700113-004 BarrProjectNo. 23691027.03 001
Prepared for United Taconite, LLC Forbes, Minnesota
January 2010

# Results of the Title VIMACTResetPerformance Tests on**Decembef5~,** 

# 10, 15, 

# and 16, 

# 2009 at United Taconite, LLC.

- Processing Facilities Locatedin Forbes, Minnesota

Line 1 

# Pellet CoolerExhaust (SV047) 

# Line2A Waste Gas (SV048) 

# Line2B Waste Gas (SV049) 

# Line 1 

# Kiln CoolerDischargeNew (SVl16)



# MPCAAQDFileNo. 869A AirEmissionsPermitNo. 13700113-004 BarrProjectNo. 23691027.03 001
Prepared for United Taconite, LLC Forbes, Minnesota
January 2010



# BARR 4700 West 77th Street Minneapolis, MN 55435-4803 Phone: (952) 832-2600 Fax: (952) 832-2601

# Results of the Title V and MACT Reset Performance Tests on December 8, 10, 15, and 16, 2009 at United Taconite, LLC. - Processing Facilities Located in Forbes, Minnesota

Table of Contents Report Certification

......................................................................................................................................iv Certification ofSampling Procedures:

.................................................................................................iv Certification ofAnalytical Procedures:

................................................................................................iv Certification ofTest Report by Testing Company:

..............................................................................iv Certification ofTest Report by Owner or Operator ofEmission Facility:

............................................v Executive Summary

.....................................................................................................................................vi
Introduction

................................................................................................................................................... 1
Results Summary

..........................................................................................................................................2
Process Description

.......................................................................................................................................4
Stack Test Procedures and Methods

..............................................................................................................6

23691027 11

## Table I Table 2 Table 3 Table 4 Table 5 Table 6 Table 7 

# List ofTables Particulate Matter Test Results

- Line 1 Pellet Cooler Exhaust (SY047) Particulate Matter Test Results

- Line 2A Waste Gas Stack (SY048) Gaseous Pollutant Test Results

- Line 2A Waste Gas Stack (SY048) Particulate Matter Test Results

- Line 2B Waste Gas Stack (SY049) Gaseous Pollutant Test Results

- Line 2B Waste Gas Stack (SY049) Sulfur Dioxide Removal Efficiency Determination- Line 2 Waste Gas Stacks Particulate Matter Test Results

- Line 1 Kiln Cooler Discharge New (SYl16)



# List of Figures Figure 1 Test Port Locations

- Line 1 Pellet Cooler Exhaust (SY047) Figure 2 Traverse Point Locations

- Line 1 Pellet Cooler Exhaust (SY047) Figure 3 Test Port Locations

- Line 2A Waste Gas Stack (SY048, EU042) Figure 4 Traverse Point Locations

- Line 2A Waste Gas Stack (SY048. EU042) Figure 5 Test Port Locations

- Line 2B Waste Gas Stack (SY049, EU042) Figure 6 Traverse Point Locations

- Line 2B Waste Gas Stack (SY049, EU042) Figure 7 Test Port Locations

- Line 1 Kiln Cooler Discharge New (SYl16) Figure 8 Traverse Point Locations

- Line 1 Kiln Cooler Discharge New (SYl16)

Appendix A Appendix B Appendix C Appendix D Appendix E Appendix F Appendix G Appendix H Appendix I Appendix J

23691027 

# List of Appendices Report Calculations and Nomenclature Field Data Sheets Laboratory Reports and Sample Chain ofCustody Instrument Output Calibration Data Cylinder Gas Certifications Visible Emissions Evaluator Certification Process Operating Data Stack Test Plan Project Participants

111

# Report Certification

Certification of Sampling Procedures:
I certify underpenalty oflaw that the sampling procedures were performed 

## in accordance with

.the approved test plan and that the data presented in this testreport are, to thebest ofmy 

## knowledge and beUef, true, accurate, and complete. All exceptions are listed and explained below.

Signature:

# _---:;JV:.-;;".~--.....:::.I.. _

# _#,~I__~/C-:::..t..::?V\-~------­ Dan Kaschak 

# It Air Quality Teclmician BarrEngineering Co.



# Certification of Analytical Procedures: Date

I certify underpenalty oflaw that the analytical procedures wereperformed 

## in accordance with therequirements ofthe test methods and that the data present¢ for use inthe test report were, to the best ofmy 

## knowledge andbelief, true, accurate, and complete. All exceptions are listed and explained below.

Signature:

# _c2::"'-_~:....I<:i~~:=...a.=+(.-...: £2.::;;;:;:.=-1-

_____ _

# ~~ Sr. 

## Air Quality Technician BarrEngineering Co.



# Certification of Test Report by Testing Company: 

# Daft; ,

I certify underpenalty oflaw that this testreport and all attachments were preparedunder 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 ofthe person orpersons who performed sampling and analysis relatingto the performance test, the information submitted in this test report is, to the best ofmy knowledge and belief, true, accurate, and complete. All exceptions are listed and explained below.

Signature:

# ~

# £L-2>/ l/z7/Z cJ

/ () Tom

# Kuc~ski Date AirEmission Testing Supervisor BarrEngineering Co,

23691027 

## iv

# Certification of Test Report by 

# Owner or Operator of Emission Facility:
I certify under penalty oflawthat 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 orall operational andmaintenance activities that were performed on the process and control equipment during the month prior to the performance test. Based on my inquiry ofthe person or persons who performed the operational and maintenance activities, the information submitted inthis tl;:st repolt is, to the bestofmy knowledge and belief, true, accurate, and complete. All exceptions are listed and explained below.

Signature:

23691027 

# v

# Executive Summa

Barr Engineering Company performed tests on four sources at United Taconite, LLC's facility located in Forbes, Minnesota. One test was performed on the Line 1Kiln Cooler Discharge (New) for particulate matter (PM) to re-establish operating parameters for the control devices to comply with the Taconite Maximum Achievable Control Technology (Taconite MACT) requirements found in 40 CFR Part 63 Subpart RRRRR. The Line 1pellet cooler exhaust and the Line 2 waste gas stacks, 2A and 2B,

were tested to demonstrate compliance with the facility's Air Emissions Permit 13700113-004. Testing

was performed December 8,10 15-16, 2009. A summary ofthe results is reported in the Executive Summary Table.

Stack ID, emission unit ID, test results and appropriate permitted emissions limits are presented in the Executive Summary Table.

23691027 VI

# Executive Summary Table
Particulate Emissions
Average Test Results Test Parameter Line 1 Line 2A Line 28 Line 1 Kiln Method 

## 5/202,9 OTM028 Pellet Cooler Waste Gas Waste Gas Cooler Exhaust Stack Stack Discharge New Stack Vent No. SV047 SV048 SV049 SV116 Emission Unit No. EU041 EU042 EU042 EU039 Control Equipment None CE049 CE050 CE065 Test Date 12/16/09 12/10109 12/8109 12/15/09 Particulate Concentration, gr/dscf Dry Catch Only (Filterable) 0.064 0.013 0.007 0.001 Dry Catch Plus Organic 0.065 0.013 0.008


# -- Condensibles 

## Permit Emissions Limits, gr/dscf 1 

# -- 0.029 0.030



# -- Particulate Emissions Rate, Ib/hr Dry Catch Only (Filterable) 44.2 33.9 18.5 0.29 Dry Catch Plus Organic 44.2 34.4 18.9



# -- Condensibles 

## Permit Emissions Limits, /b/hr 2 

## 42.7


# -- -- 

# -- Visible Emissions, 

## % opacity 3 

## 0 0 0


# --

I 

### Total particulate compliance concentration limit determined from Minn. Rules 7011.0735 Table 2 for Title V Air Emissions Permit. Determination made using the sum offilterable and organic condensible particulate measured in the stack gas.

2 

### Total particulate compliance emissions limit calculated from Minn. Rules 7011.0730 Table 1 for Title V Air Emissions Permit. Determination made using the sum offilterable and organic condensible particulate measured in the stack gas.

3 

### Visible emissions limit less than or equal to 20%. Minn. Rules 7011.0710 subp. I(B), or 7011.0715 subp. I(B)

23691027 Vll

### 23691027 

# Executive Summary Table (Continued) Sulfur Emissions
Test Parameter Line2A Line 28 EPA Method 6C Waste Gas Waste Gas Stack Stack Stack Vent No. SV048 SV049 Emission Unit No. EU042 EU042 Control Equipment CE049 CE050 Test Date S02 Emission Rate, Ib/hr 12/10/09 12/8/09 S02 Concentration, ppm dry 212 146 S02 Emission Rate, Ib/hr 650 431 S02 Emission Rate, Ib/MMBtu 2.1 1.7 S02 2A and 2B Combined 1081 Emission Rate, Ib/hr S02 2A and 2B Combined 3.8 Emission Rate, Ib/MMBtu S02 /b/MMBtu Emission Rate, 

## 4 Limit 

## S02 Removal Efficiency, 

## %1 27.5

I 

### Determined by mass balance calculation



## viii

# Introduction

Barr Engineering Co. performed emissions tests at United Taconite, LLC processing facility located in Forbes, Minnesota on December 8,10, 15 and 16,2009. Testing was performed at the Line 1 Pellet Cooler Exhaust (SV047), the 2A Waste Gas Stack (SV048), and the 2B Waste Gas Stack (SV049) for particulate matter to demonstrate compliance with the facility's Air Emissions Permit 13700113-004 for 2009. The Line 1 Kiln Cooler Discharge New (SV 116) was tested to re-establish operating parameters for the control device to comply with the Taconite MACT requirements found in 40 CFR Part 63 Subpart RRRRR. In addition, sulfur dioxide was tested at the 2A and 2B Waste Gas Stacks to demonstrate compliance with Title V permit limits and scrubber removal efficiency determination.

A test plan was submitted November 16,2009 for five the sources to be tested. The plan was discussed

on November 30,2009 via phone conference with Andy Place ofthe Minnesota Pollution Control Agency (MPCA), Candice Maxwell ofUnited Taconite, Tom Kuchinski and Dan Koschak ofBarr Engineering in attendance. The test plan was approved December 3,2009. A copy ofthe test plan, email correspondence from United Taconite to Andy Place ofthe MPCA pertaining to the test plan, and approval forms are provided in Appendix 1.



## 7F Fine Crushing (EU017, SV023) was not tested and is discussed in the Performance Test Plan Approval located in Appendix 1. 

## The actual test dates varied from what the test plan called out. Process problems and weather conditions caused the delays in testing.

Dan Koschak led the Barr test team. Candice Maxwell ofUnited Taconite, LLC provided testing coordination. The tests were not witnessed by the MPCA. A list ofproject participants is provided in Appendix J.

Tests for Title V permit compliance demonstration at the Line 1 Pellet Cooler and 2A and 2B Waste Gas Stacks consisted ofthree one-hour runs for particulate and one hour opacity tests. Sulfur Dioxide testing coincided with the particulate runs at the 2A and 2B waste gas stacks. The opacity testing on the 2A and 2B Waste Gas Stacks was performed simultaneously because the plumes were combined. This approach was approved by Andy Place ofthe MPCA via telephone with Tom Kuchinski ofBarr on December 8, 2009. The test at the Line 1 Kiln Cooler New consisted ofthree two- hour runs. All tests
were performed at production rates listed in the test plan.

23691027

# Results Summa

Results ofthe particulate matter emissions performance tests are summarized in the Executive Summary Table. The results are summarized for filterable particulate matter, filterable plus organic particulate matter emissions, and total particulate matter emissions-the sum offilterable, and organic and inorganic condensibles. Filterable particulate matter (PM) plus organic condensible particulate
matter emissions results are used when determining compliance with the applicable PM limit in the Minnesota Rules, expressed in grains per dry standard cubic foot (gr/dscf) and pounds per hour (Ib/hr).



## Line 1 Pellet Cooler Exhaust (SY047)

Results ofthe December 16,2009 particulate test are provided in Table 1. The source does not meet the permitted emissions concentration limit determined using the average air flow rate of 80,000 dscfm, nor does it meet the mass emissions rate based on the fired pellet throughput rate of251 LTPH. Visible emissions observations were performed concurrent with test run two. Results ofthe observations were not summarized because all observations were zero. A copy ofthe field observation sheet is located in Appendix B. No testing problems or process interruptions occurred during the testing.



## Line 2A Waste Gas Stack (SY048)

Results ofthe December 10, 2009 particulate and opacity testing are provided in Table 2. Results of the sulfur dioxide testing are presented in Table 3. This source was scheduled to be tested on December 9,2009 but was delayed was due to weather conditions that created a dangerous environment at the stack. This change in schedule was communicated with the MPCA. The source complies with the emissions concentration limit determined using the average air flow rate of307,000 dscfm. No problems were encountered while testing. Sulfur dioxide emissions are discussed below.



## Line 2B Waste Gas Stack (SY049)

Results ofthe December 8, 2009 particulate test are provided in Table 4. Results ofthe sulfur dioxide testing are presented in Table 5. The source complies with the emissions concentration limit determined using the average air flow rate of296,000 dscfm. An opacity determination was made by reading the combined plumes ofthe 2A and 2B Waste Gas stacks during the third particulate run. The highest sixminute average was 0.0 percent. No problems were encountered while testing.

23691027 

## 2

## The 2A and 2B waste gas stacks combined sulfur dioxide emission rates is 3.8 pounds per million British thermal unit (lb/MMBTu) which complies with the 4 Ib/MMBtu permit limit.

The mass balance and removal efficiency results are presented in Table 6. The removal efficiency of the scrubbers for sulfur dioxide is 27.5 percent. Samples offeed material (coal and greenballs) and exit points (taconite pellets and stack emissions) were used in the mass balance calculation. Laboratory analysis data for feed material and pellets is located in Appendix C. Coal samples were analyzed at two separate laboratories (Twin Ports Testing and SGS labs) for heat value and sulfur content. The coal analysis results from Twin Ports Testing were used for the calculations as this is the lab normally used by United Taconite for fuels analysis. Greenball and fired pellet sulfur content determined using the average results from Twin Ports testing and Lerch Bros. Two other laboratories (SGS and Legend Technical Services) also analyzed greenball and fired pellets. Data from these labs were not used due to incorrect methodology (SGS) and inconsistent results (Legend Technical Services) based on historical data. All laboratory data is provided in Appendix C.


## Line 1 Kiln Cooler Discharge New (SV116)

Results ofthe December 15,2009 test are provided in Table 7. During run one, the process data collection system malfunctioned. Process data was lost from 0903-0923. No process upsets occurred while the data collection system was down. During run two, there was an 83 minute delay in testing starting at**~80** 

## minutes into the test. A cooler upset caused the delay.

23691027 

## 3

# Process Description

Line 1 Pellet CoolerExhaust (EU041, SV047)

The Line 1 pellet cooler is an uncontrolled source that provides cooling ofthe pellets at the exit ofthe induration kiln. Process rates during the testing averaged 295 LTPH green balls and 251 LTPH fired pellet production.



## Line 2A and B Waste Gas Stacks (EU042, SV048, SV049)

The Line 2 pellet induration is an Allis Chalmers rotary kiln (serial number B-4130I), which is 130 feet in length with a 21' 6" diameter. The pellets pass through the kiln where they are heated to approximately 2400 degrees Fahrenheit. The heated gases from the kiln are mixed with recouped hot air from the pellet cooler. This air is used to dry the green pellets prior to the kiln in the preheat zones. The waste gases are divided into two sides which are served by identical Ducon venturi scrubbers (Size 

# 825/222 Type VVO), Side A (CE049, SV048) and Side B (CE050, SV049).

The kiln was firing on coal/coke blend for the tests. The process rate for the 2A testing averaged 647 LTPH greenball feed and 527 LTPH fired pellets. The process rate for the 2B testing averaged 632 LTPH greenball feed and 512 LTPH fired pellets. Coal sample composites were collected and analyzed by ultimate proximate. The average heat input to the kiln was 308MMBtu/hr during the 2A test and 257 MMBtu/hr for the 2B test. Samples ofthe greenball and fired pellets were analyzed for sulfur content for the sulfur mass balance calculations. Laboratory data is located in Appendix C.



## Line 1 Cooler Discharge New(EU39, SV116)

The Cooler Discharge (EU039) is served by a two scrubbers for particulate emissions control at the point where cooled pellets are emptied from the Pellet Cooler; the old scrubber (SV045 and the new discharge scrubber (SV116). The Line I Cooler Discharge New control device is a Ducon Type dynamic wet scrubber Type UW-4 Model IV Size 120. The average water flow rate to the scrubber was 88 GPM and the average pressure drop across the control device was 4.2 inches water column. Throughput rates during the testing period averaged 290 LTPH greenball and 248 LTPH fired pellets.

23691027 

## 4

## Process data and control equipment parameter information for the testing is presented in the tables and in Appendix 

# H.

23691027 

# 5

# Stack Test Procedures and Methods

Testing was performed from ports meeting EPA Method 1 criteria. The Method 1 criteria are listed in the table below. Sample port location and traverse point details are provided in Figures 1-8.

Location SV# Distance to Distance to Number of Number of Average upstream downstream ports Points Absolute Disturbance, Disturbance, Yaw Angle (diameters) (diameters) SV047 -3 1 4 24 1.0 SV048 -7.9 2.1 4 12


# - SV049 -7.1 2.1 4 12



# - SV116 4.25 1.9 2 24 2.3


## Volumetric airflow determinations were performed in accordance with EPA Method 2 using an S type pitot tube. Airflows were determined in conjunction with the EPA Method 5 tests.

Stack gas compositions ofthe Line 1 Pellet Cooler Exhaust and the Line 1 Kiln Cooler New were at ambient concentrations. Line 2A and B stack gas composition was measured by EPA Method 3A. Stack gas moisture content was determined by the performance ofEPA Method 4, in conjunction with the EPA Method 5 tests.

Filterable particulate concentration and emission rates were determined in accordance with EPA Method 5. Condensible particulate matter collected in the back halfofthe sample train was determined using EPA Method 202 at the Line 1 Pellet Cooler Exhaust and OTM028 at the Line 2A and B Waste Gas Stacks.

EPA Method 6C was used to determine sulfur dioxide concentrations in the 2A and 2B Waste Gas stacks. Testing was conducted at three sample points in the stack through a heated probe and filter assembly. Sample was transported through Teflon line and conditioned to remove moisture prior to analyzing in an API Model 200EH analyzer. The analyzer was calibrated with EPA Protocol 1 gases. Copies ofcalibration gas certifications are located in Appendix F. Analyzer data was output to a data logger and recorded every 20 seconds.

Visible emissions were evaluated by a certified observer following EPA Method 9.

23691027 

## 6

## The test methods referenced above are found in 40 CFR part 60, Appendix A, except for EPA Method 202, which is found in 40 CFR Part 51, Appendix M. OTM 028 is not a promulgated method at the time ofthis report.

23691027 

## 7

# Tables

## Cliffs Natural Resources Inc. United Taconite, llC Forbes, Minnesota
TABLE 1


## PARTICULATE MATTER TEST RESULTS
Line 1 Pellet Cooler Exhaust (SV047)

Parameter 

## I Run 1 

## I Run 2 Test Date i 

## 12/16/2009 

## i 12/16/2009 Test Period ! 

## 819

- 933 

## i 1019

- 1126

, , 

## Test Duration, min. 

## i 60 60 Avg. Stack Temperature, deg.F ! 

## 595 580 Avg. Moisture Content, %VN ! 

## 1.0 0.8 I 

## Particulate loading, g Dry Catch I 

## 0.1687 0.1067 Organic Condensibles ! 

## 0.0000 i 

## 0.0000 Aqueous Phase Condensibles i 

## 0.0041 : 

## 0.0019 Total I 

## 0.1728 0.1086 I ! 

## Air Flow Rate
I 

# ! acfm I 

## 170,000 166,000 I 

## scfm I 

## 82,000 I 

## 81,000 I I I 

## dscfm I 

## 81,000 : 

## 81,000
, 

## Sample Volume acf 

## i 33.08 i 

## 32.96 I 

## dscf i 

## 33.71 1 

## 33.14 i


## Isokinetic Variation, % i 

## 100.0 

## i 99.2
Particulate Concentration, 

## gr/dscf Dry Catch Only (Filterable) 0.077 i 

## 0.050 

## i Dry Catch 

## + Organic Condensibles 0.077 i 

## 0.050 ! 

## Dry Catch Only 

## + Organic Condensibles 

## + 0.079 ! 

## 0.051

Aqueous Phase Condensibles (Total)
Particulate Emissions Rate, Ib/hr Dry Catch Only (Filterable) 53.8 i 

## 34.3 Dry Catch 

## + Organic Condensibles 53.8 i 

## 34.3 Dry Catch 

## + Organic Condensibles 

## + 55.1 34.9 Aqueous Phase Condensibles !


## Greenball Feed Rate, l TPH 

## i 295 i 

## 295 I 1 

## Fired Pellet Production Rate, l TPH 252

, 

## 251 Total Particulate Emission Rate, Ib/l T Greenball 0.19 

## i 0.12 Total Particulate Emission Rate, Ib/l T Fired Pellet 

## I 0.22 

## i 0.14 Barr Engineering Co. January 27,2010

Run 3 Average ! 

## 12/16/2009



# --- I 

## 1156

- 1302


# --- i 60 60

- 

## 565 580 0.4 0.8

0.1383 0.1379 0.0002 0.0001 0.0013 0.0024

I 

## 0.1398 0.1404

! 

## 157,000 164,000

1 

## 78,000 80,000

I 

## 78,000 80,000

I 

## 32.27 32.77

I 

## 32.09 32.98


## i 99.1 99.4

i 

## 0.067 0.064 I I 

## 0.067 0.065 i
! 

## 0.067 0.066

, 

## 44.5 44.2 44.6 44.2 

## i 45.0 45.0
:


## 295 295

, 

## 251 251 ! 

## 0.15 0.15 0.18 0.18

### Cliffs Natural Resources Inc. United Taconite, llC. Forbes, Minnesota


### TABLE 2
PARTICULATE MATTER TEST RESULTS
Line 2A Waste Gas Stack (SV048)

Parameter , 

### Run 1 , 

### Run 2 I 

### , 

### Test Date I 

## 12/10/2009 : 

## 12/10/2009 I 

### Test Period 1102

- 1209 , 

### 1239

- 1345 Test Duration, min. I 

### 60 60 IAvg. Stack Tbl ItJcrature deg.F 122 , 

### 123 Avg. Moisture Content, 

## %VN 

## i 12.0 : 

### 10.7 Particulate loading, g Dry Catch 0.0386 0.0244 Organic COl lucll

..ibles 0.0003

. 

### 0.0004 Aqueous Phase Condensibles , 

### 0.0110 0.0110 Total 0.0499 0.0358 Air Flow Rate acfm 

## i 405,000 i 

### 407,000 scfm , 

### 347,000 ! 

### 348,000 dscfm 306,000 311,000 Sample Volume acf 38.57 38.96 dscf 37.80 38.04

Isokinetic Variation, % ! 

### 97.3 96.3
Particulate Concentration, 

## gr/dscf Dry Catch Only (Filterable) , 

### 0.016 ! 

### 0.010

, 

### Dry Catch 

## + Organic Condensibles 

## I 0.016 I 

### 0.010 Dry Catch Only 

## + Organic Condensibles 

## + I 0.020 \ 

### 0.015 , , 

### Aqueous Phase Condensibles (Total) I


### Particulate Emissions Rate, Ib/hr Dry Catch Only (Filterable) 41.3 ! 

### 26.4 I ! 

### Dry Catch 

## + Organic Condensibles 41.6 

## I 26.9 Dry Catch 

## + Organic Condensibles 

## + 53.4 ! 

### 38.7 ; 

### Aqueous Phase Condensibles 

## i
Greenball Feed Rate, lTPH 647 [ 

### 647 Fired Pellet Production Rate, l TPH 527 526 Total Particulate Emission Rate, Ib/lT Greenball 

## I 0.083 , 

### 0.060 I 

### Total Particulate Emission Rate, Ib/l T Fired Pellet ; 

### 0.101 0.074 Highest Six-Minute Average Opacity*, % , 

# -- i



# -- Barr Engineering Co. January 22,2010

Run 3 Average 

## 12/10/2009


# --- 1413

- 1519 

# --- 60 60 123 123 12.2 11.6

0.0324 0.0318

; 

### 0.0005 0.0004 : 

### 0.0157 0.0125 0.0486 0.0448

! 

### 404,000 405,000

: 

### 345,000 347,000 303,000 307,000

39.14 38.89 38.08 37.97

98.8 97.5

0.013 0.013

! 

### 0.013 0.013 0.020 0.018

34.1 33.9 i 34.7 34.4 51.2 47.8

648 647 527 527 0.079 0.074 0.097 0.091


## i 0


# -- *Opacity performed simultaneously with l2B WGS with approval from Andy Place on 

## 12/08/09 (1432-1532)

### Cliffs Natural Resources Inc. United Taconite, LLC Forbes, Minnesota

TABLE 3


### GASEOUS POLLUTANT TEST RESULTS
Line 2A Waste Gas Stack (SV048)

Parameter ! 

### Run 1 Ii 

### Run 2 , 

### Test Date 

## I 12/10/2009 12/10/2009 Test Period 

## I 1102-1209 i 

### 1239-1345 t-ir Flow Rate ACFM 

## i 405,000 -±Q7,000 SCFM I 

### 347,000 348,000 DSCFM 306,000 311,000

EPA Method 6C Results S02 Concentration, PPM i 

### 212 I 

### 213 S02 Emission Rate, Iblhr I 

### 648 660 S02 Emission Rate, Ib/MMBtu i 

### 2.1 2.2 Process Data Heat input, MMBTU/hr 307 304 Barr Engineering Co. January 26,2010

Run 3 j 

### Average 

## i 12/10/2009


# --
, I 

### 1413-1519 

# --

j 

### 404,000 405,000
; 

### 345,000 347,000 303,000 307,000

212 212 641 650 2.1 , 

### 2.1

, 

### 301 304

## Cliffs Natural Resources Inc. United Taconite, LLC Forbes, Minnesota
TABLE 4
PARTICULATE MATTER TEST RESULTS
Line 2B Waste Gas Stack (SV049)

Parameter i 

## Run 1 

# I Run 2 , 

## Test Date i 

## 12/8/2009 

## i 12/8/2009 Test Period I 

## 1043

- 1153 i 

## 1228

- 1336 I 

## Test Duration, min. i 

## 60 I 

## 60 Avg. Stack Temperature, deg.F 122 118 Avg. Moisture Content, 

## %VN ! 

## 11.3 I 

## 11.0 i 

## Particulate Loading g Dry Catch • 

## 0.0181 0.0163 Organic Condensibles 

## i 0.0002 : 

## 0.0004 Aqueous Phase Condensibles 0.0107
, 

## 0.0068 Total i 

## 0.0290 ! 

## 0.0234 Air Flow Rate acfm ! 

## 381,000 ! 

## 378,000 scfm , 

## 333,000 332,000 dscfm 295,000 296,000 Sample Volume acf i 

## 38.27 I 

## 38.44 dscf 

## i 36.35 I 

## 37.66
Iisokinetic Variation, 

## % i 96.0 

## i 99.2
Particulate Concentration, gr/dscf Dry Catch Only (Filterable) ! 

## 0.0077 I 

## 0.0067 I 

### , 

## Dry Catch 

## + Organic Condensibles i 

## 0.0078 ! 

## 0.0068 Dry Catch Only 

## + Organic Condensibles 

## + 0.0123 0.0096 I ! 

## Aqueous Phase Condensibles (Total) i I , 

## Particulate Emissions Rate, Ib/hr Dry Catch Only (Filterable) I 

## 19.5 i 

## 16.9 Dry Catch 

## + Organic Condensibles 19.7 17.3 Dry Catch 

## + Organic Condensibles 

## + I 

## 31.2 24.3 i 

## Aqueous Phase Condensibles
Greenball Feed Rate, L TPH 631 632 Fired Pellet Production Rate, L TPH 508 : 

## 513 Total Particulate Emission Rate, Ib/LT Greenball 

# : 0.049 : 

## 0.038 Total Particulate Emission Rate, Ib/LT Fired Pellet : 

## 0.061 I 

## 0.047 Barr Engineering Co. January 22, 2010

! 

## Run 3 Average
! 

## 12/8/2009



# ---
! 

## 1428

- 1553



# --- 60 60

• 

## 119 120 11.3 11.2

0.0185 0.0176 0.0006 0.0004
i 

## 0.0097 0.0091 0.0287 0.0271

• 

## 380,000 380,000

- , 

## 334,000 333,000 296,000 296,000

38.47 38.39 37.83 37.28

99.6 98.3

! 

## 0.0075 0.0073 

## i 0.0078 0.0075 0.0117 0.0112

19.1 18.5 19.7 18.9 29.7 28.4

- ---- 

## 634 632 515 512 0.047 0.045 0.058 0.055

### Cliffs Natural Resources Inc. United Taconite, LLC Forbes, Minnesota

TABLE 5


### GASEOUS POLLUTANT TEST RESULTS
Line 2B Waste Gas Stack (SV049)

Parameter Run 1 

# i Run 2 Test Date 

## 12/8/2009 , 

## 12/8/2009 Test Period 1043-1152 1227-1336 Air Flow Rate ACFM 381,000 f 

### 378,000 SCFM 333,000 

## i :n? 000 

### DSCFM : 295,000 !**?~R** 

### 000



### EPA Method 6C Results S02 Concentration, PPM 144 r 

### 147 S02 Emission Rate, Iblhr 424 I 

### 432 I 

### S02 Emission Rate, Ib/MMBtu 1.6 i 

### 1.7 Process Data Heat input, MMBTU/hr 260 259 Barr Engineering Co. January 26,2010

i 

### Run 3 Average 

## 12/8/2009


# -- 1428-1555


# --

i 

### 380,000 380,000 

## i 334,000 333,000 296,000 296,000

- 

### 148 146

I 

### 437 431 i 

### 1.7 1.7

. 

### 261 i 

### 260

## Cliffs Natural Resources Inc. United Taconite, LLC Forbes, Minnesota
TABLE 6
SULFUR DIOXIDE REMOVAL EFFICIENCY DETERMINATION Line 2 Waste Gas Stacks Sulfur Mass Balance Determination Barr Engineering Co. January 28,2010

II-'arameter i 

## waste Gas**~tack** 

## 2A : Waste Gas**~tack** 

### 2tj I 

## Test Date ! 

## 12/10/2009 I 

## 12/8/2009 I 

## Test Period i 

## 1102-1509 I 

## 1043-1055 I I 

## * Fuel Consumption Rate, TPH ! 

## 10.82 

## i 9.12 i 

## ** Fuel Moisture Content I 

## 1.3 1.21 * Greenball Feed Rate, L TPH 600 587 ** Greenball Moisture Content, 

## % 9.56 9.63 Taconite Production Rate, L TPH 527 512 ** Fuel Sulfur Content, 

## % dry 3.61 I 

## 3.67 ***Greenball Sulfur Content, 

## % dry 0.005 0.005 ***Taconite Sulfur Content, 

## % dry 0.003 0.002 I 

## Total Sulfur input, Ib/hr (1) 832 722 Sulfur Output with Fired Pellets, Ib/hr (2) 34 28 Sulfur Loading to Scrubbers, Ib/hr (3) 798 I 

## 694 i i 

## Sulfur Dioxide Loading to Scrubbers, Ib/hr (4) I 

## 1595 I 

## 1388 i 

### i 

## Average Sulfur Dioxide Loading Rate to Scrubbers, Ib/hn 1492 I 

## Sulfur Dioxide Emission Rate from Scrubbers, Ib/hr (5) I 

## 1081 Sulfur Dioxide Removal EffiCiency, 

## % , 

## 27.5 t I**~** 

## t- rom I-'rocess uata ** Laboratory data from TPT *** Laboratory Results. ASTM Method 1915-07a (average ofTPT and Lerch Bros Results) (1) Sulfur Input, Ib/hr 

## = [(Greenball Feedrate to Kiln,LTPH x 2240 Ib/LT) x (1-Greenball Moisture Content, %/100) x (Greenball Sulfur Content, %/100)] 

## + [(Fuel consumption Rate, TPH x 2000 Ib/ton) x (1-Fuel Moisture Content, %/100) x (Fuel Sulfur Content)

(2) Sulfur Output with Fired Pellets 

## = (Fired Pellet Production Rate, L TPH x 2240 Ib/LT) x ( Fired Pellet Sulfur Content, %/100) (3) Sulfur Loading Rates to Scrubbers 

# =(Sulfur Input

- Sulfur Output with Fired Pellets)
(4) S02 Loading Rate to Scrubbers

# =Sulfur Loading Rate, Ib/hr x Ib mol/32 Ib sulfur x 64 Ib S02/lb mol

(5) As Determined from EPA Method 6C Stack Tests (combined average emissions from both stacks)

## Cliffs Natural Resources Inc. United Taconite, llC Forbes, Minnesota
TABLE 7


## PARTICULATE MAnER TEST RESULTS
Line 1 Kiln Cooler Discharge New (SV116)

Parameter I 

## Run 1 i 

## Run 2 I ! 

## Test Date : 

## 12/15/2009 12/15/2009 Test Period 823

- 1032 : 

## 1100

- 1428

, 

## Test Conditions

Scrubber Water Flow Rate, gpm 34 117
I 

## Scrubber Pressure drop, in w.c. 4.2 4.2 Test Duration, min. 120 120 Avg. Stack Temperature, deg.F 60 57 Avg. Moisture Content, %VN ! 

## 1.5 1.6 Particulate loading, g Dry Catch 1 

## 0.0050 ! 

## 0.0045 Air Flow Rate acfm Ii 

## 36,000 35,000 scfm ! 

## 35,000 I 

## 35,000 dscfm : 

## 34,000 34,000 Sample Volume acf 

## l 70.94 

## i 70.88 dscf ! 

## 72.26 ! 

## 71.76**Ils2J<:ineti~**

## Variation, 

## % ! 

## 99.1 i 

## 98.7
Particulate Concentration, gr/dscf Dry Catch Only (Filterable) 0.0011 I 

## 0.0010
Particulate Emissions Rate, Ib/hr Dry Catch Only (Filterable) 

## i 0.32 i 

## 0.28 I


## Greenball Feed Rate, l TPH 

# i 290 i 

## 286 Fired Pellet Production

# Bate, l TPH 1 

## 246 

## i 244 Total Particulate Emission Rate, Ib/l T Greenball 

# l 0.0011 I 

## 0.0010 Total Particulate Emission Rate, Ib/l T Fired Pellet i 

## 0.0013 

## i 0.0012 I 

## Barr Engineering Co. January 22, 2010

Run 3 Average 12/15/2009


# ---
! 

## 1451

- 1654



# ---
116 89

, 

## 4.1 4.2 120 120 57 58 1.6 1.6

0.0042 

# I 0.0046
35,000 35,000 I 

## 34,000 35,000 34,000 34,000


## i 70.30 70.71 i 

## 70.65 71.56


## i**9~** 

## 98.8

; 

## 0.0009 

# I 0.0010

I 

## 0.27 0.29

295 290 252 247 0.0009 0.0010 I 0.0011 0.0012

# Figures

# NOT TO SCALE 4 

# TEST PORTS @ 

# 90 DEGREES 

# -I 119" ID 

# I

1.0 DIAM ETERS



# o

------- ROOF LINE



# t >3.0 DIAMETERS



# TEST PORT LOCATIONS

UNITED TACONITE, LLC

FORBES, MINNESOTA LINE 1 PELLET COOLER EXHAUST (SV047) FIGURE 1

## A



# D



# C

NO. OF TEST PORTS 4 PORT LENGTH 12.75" PORT DIAMETER 6" NO. OF TRAVERSE POINTS 24 DUCT DIAMETER 119.00"



# TRAVERSE POINT LOCATIONS UNITED TACONITE, LLC

FORBES, MINNESOTA POINT
1 2 3 4 5 6



# LINE 1 PELLET COOLER EXHAUST (SV047) NOT TO SCALE 

# FIGURE 2 B

INSERTION DEPTH IN 

# " 2.53 7.97 14.06 21.09 29.75 42.32

## -,-------- 

# t I 26.00'

"-'7.9 

# DIAMETERS 

# 1147.00"-1



# o



# o

FLOW



# TEST PORT LOCATIONS UNITED TACONITE, LLC

FORBES, MINNESOTA LINE 2A WASTE GAS STACK (SV048, EU042) FIGURE 3 NOT TO SCALE 4 TEST PORTS @ 

## 90'



# TESTING PLATFORM

ROOF

# B

NO. OF TEST PORTS PORT LENGTH UPPER PORT LENGTH LOWER PORT DIAMETER NO. OF TRAVERSE POINTS DUCT DIAMETER 

# • A

& 

### X



# x

x

C D

4 e 

# M2 POINTS 

# x M6C POINTS POINT INSERTION DEPTH IN " 6.88"

4.0" 1 6.40 4.0" 2 21.53

12 147.00" 3 43.49



# TRAVERSE POINT LOCATION UNITED TACONITE, LLC

FORBES, MINNESOTA POINT INSERTION DEPTH IN " 1 24.55 2 73.50 3 122.45



# LINE 2A WASTE GAS STACK (SV048, EU042) NOT TO SCALE 

# FIGURE 4

# 26.00'

"-'7.1 DIAMETERS 

# 1146.25"-1



# o



# l'

FLOW



# TEST PORT LOCATIONS

UNITED TACONITE, LLC

FORBES, MINNESOTA 4 TEST PORTS @ 

# 90·

TESTING PLATFORM



# LINE 2B WASTE GAS STACK (SV049, EU042) FIGURE 5 NOT TO SCALE

# B

NO. OF TEST PORTS 4 PORT LENGTH 7.0" PORT DIAMETER 6,0" NO. OF TRAVERSE POINTS 12 DUCT DIAMETER 146.25" 

## A



# •

x



# x

x 

# •

C

e 

## M2 POINTS

POINT INSERTION DEPTH IN " 1 6.37 2 21.42 3 43.27



# TRAVERSE POINT LOCATION UNITED TACONITE, LLC

FORBES, MINNESOTA D



# x M6C POINTS

POINT INSERTION DEPTH IN " 1 24.42 2 73.13 3 121.83



# LINE 2B WASTE GAS STACK (SV049, EU042)
NOT TO SCALE 

# FIGURE 6

# 2 TEST PORTS @ 

# 90 DEGREES 60" ID 

# -I 

# f

# o



# t 

# I

9' 6" 

# I

ROOF LINE

21' 3"

1---- 

# FLOW STRAIGHTNER

SCRUBBER



# TEST PORT LOCATIONS UNITED TACONITE, LLC

FORBES, MINNESOTA FROM KILN COOLER DISCHARGE



# LINE 1 KILN COOLER DISCHARGE NEW (SV116)
NOT TO SCALE 

# FIGURE 7

## NO. OF TEST PORTS 2 PORT LENGTH 4.5" PORT DIAMETER 4" NO. OF TRAVERSE POINTS 24 DUCT DIAMETER 60.0" 

# • 

# •

TRAVERSE POINT LOCATIONS UNITED TACONITE, LLC FORBES, MINNESOTA POINT
1 2 3 4 5 6 

## 7 8 9 10 11 12



# LINE 1 KILN COOLER DISCHARGE NEW (SV116)
NOT TO SCALE 

# FIGURE 8 INSERTION DEPTH IN 

# " 1.26 4.02 7.08 10.62 15.00 21.36 38.64 45.00 49.38 52.92 55.98 58.74

# Appendices

# Appendix A Report Calculations and Nomenclature

## Calculation Equations

- EPA Methods 3A, 6C, 7E, 10

System bias adjustment on source concentration indicated by the analyzer.

where: 

# C 

# -(c -C) C mA 

### ppm - A 

## a 

# C C
m - 

## a

is the adjusted source concentration, ppm(dry) is the average concentration indicated by the analyzer, ppm(dry) is the average ofthe initial and final system calibration responses ofthe zero gas, ppm is the average ofthe initial and final system calibration responses ofthe upscale gas, ppm is the certified concentration ofthe upscale calibration gas, ppm

Convert source concentration into emission rate (lb/hr).

where: 

# C _ MWxCppm 

# ( .-!!!L)

- 24.04 dscm



### E{!b/llr) 

# =(6.242 x 10-8

# )x

# C(.!!!L) x 60 x 

# Qd
dscm 

# C(.!!!fL)
dscm 

## MW



## 24.04 E(lblhr) 

## 6.242xlO·8 

# Qd 60 amount ofcompound, by weight(mg), per dry standard cubic meter ofair

is the molecular weight ofthe gaseous compound whereMW= 

## 64 S02 46 N02 

## 28 CO 

## is the molar volume ofgas at 68 

## OF and 29.92 

## in Hg, Llg-mole emission rate ofgaseous compound in pounds per hour is the conversion factor from mg/m3 

## to Ib/ft3 flow rate ofdry gas at standard conditions in cubic feet per minute, dscfrn is the conversion factor from minutes to hours

W:\Business Units\EM\Subunit Admin\Technical & 

### Support Services\AIR SAMPLlNG\Templates\Reports\Equations\analyzereq Compliance.doc

## Emission rate ofpounds per MMBtu heat input.

E E(tb/hr)

(fbIMMBlu) 

# = Heat Input(MMBtuIhr)

Heat Input from operating data summary

W:\Business Units\EM\Subunit Admin\Technical & 

### Support Services\AIR SAMPLING\Templates\Reports\Equations\analyzereq.docCliffs Natural Resources Inc. United Taconite, LLC Forbes, Minnesota Barr Engineering Co. January 27, 2010

Determination ofVolumetric Airflow Rate, Gas Composition, Moisture Content, and Particulate Emissions EPA Methods 2, 3, 4, 5, 202
Line 1 Pellet Cooler Exhaust (SV047) Input Data 

### I Symbol : Units Run 1 Run2 

### I Run3 Test Date I

, 

### , 

# - i 12116/2009 

### i 12116/2009 i 1211612009 Test Period 

# - : 819

- 933 ; 1019 -1126,1156 -1302 Number of Sample Ports 

### !



# - i 4 4 

### , 4 Number ofTraverse Points :

, 

### !



# - i 24 24 24 Duct Dimensions (diameter or Length x Width) I D,LXW 

### i inches i 119.00 I 119.00 

### I 119.00 Barometric Pressure 1 Pbar in. Hg i 28.95 

## I 28.95 ! 28.95 Stack Static Pressure 

## i Pg in. H2O -D.22 

### i -D.22 -D.22 Average Stack Temperature, dry bulb 

## i Tsf 

### , dewees F : 595 

### , 580 

### i 565 I Actual Dry Gas Meter Volume 

### ! Vm cubic feet 

### : 33.08 

### ! 32.96 

## i 32.27 Dry Gas Meter Calibration Factor 

### , Y 

### i 0.9886 

### i 0.9886 \ 0.9886 Average Orifice Meter Pressure Drop 

## i DH in H2O 

## I 1.06 

## i 1.05 

### ! 1.00 Average MeterTemperature 

### : Tmf 

## I degrees F 1 37 43 

### i 49 Pitot Tube Coefficient I Cp i 

## I 0.840 I 0.840 i 0.840 Average Square Root of Velocity Head (DP)AO.5 , 

# - 0.452 i 0.445 0.427 Volume ofWatervaeor Condensed in Imeingers Vwc ml 

### , 0 i ·5 -4 Mass ofWater Vapor Collected in Desiccant VwSg g 7 : 11 7 Orsat Results, Dry Basis

Carbon Dioxide i %C02 OfrN/v 0.03 0.03 0.03 Oxygen 

### , %02 , %vlv 20.9 20.9 

### , 20.9 Carbon Monoxide + Nitrogen %vlv 79.1 79.1 79.1 Nozzle Diameter On in

• 0.313 0.313 0.313 Run Time : theta min 60 60 60 Particulate Loading

Dry Catch Mdry 0 0.1687 0.1067 0.1383 Wet Catch Organic Fraction M org 9 0.0000 I 0.0000 0.0002 Wet Catch Inorganic Fraction MIO 

### , g 0.0041 0.0019 0.0013 Total (Dry Catch + Organic Wet Catch) j Mn I 9 : 0.1728 0.1086 0.1398

Calculated Data 

### I Symbol : Units I Run 1 I Run2 

### i Run 3 Average Absolute Stack Temperature (R) 

### i Tsr 

## I degrees R ! 1055 : 1040 i 1025 I Tsr

## = Tsf + 460 i i I Stack Pressure 

## i Ps i inHg 

## I 28.93 1 28.93 28.93

Ps

## =Pbar + Pg 113.6 

## I , Duct Area ! A 

# i Sq. ft 

### : 77.236 , 77.236 77.236

A = L xW/144 MeterVolume at Standard Conditions 

### : Vmstd 

## i cubic feet 

### ! 33.71 

### : 33.14 

# i 32.09

Vmstd = 17.84 x Vm x Y x «Pbar+(DH/13.6))lTmr) i Average Moisture Content of Stack Gas 

### , MC % Vol : 0.97 i 0.85 0.44

MC = «.04707 xVwc+.'

. 04707 x Vwc+.04715'\1wsg) + Nmstd) x 100 i 1 

### , Molecular Weight of Stack Gas, dry Md Ibnbmol 28.84 i 28.84 28.84

Md = (0.44x(%C02))+(0.32x(%02))+(0.2Bx(%N2+%CO)) , MolecularWeight of Stack Gas, wet 

### ! Ms Ibnbmol 28.73 28.75 28.79

Ms

## = Md x (1-(MC/100))+18 x (MC/100) 

### : Average Stack Gas Velocity 

### ! Vs ftlsec

• 36.61 I 35.73 , 33.98

Vs

## = 85.49 x Cp x (dP)AO.5 x «Tsr/(Psx Ms))AO.5) i 

### I
Actual Volumetric Flowrate 

## i Qa ! acfm 169,641 165,561 ! 157,463

Qa =60 xVs xA 

### i Volumetric Flowrate at Standard Conditions ! Qs scfm 

### ! 82,070 81,251 78,420

Qs = Qa x (528/(Ts+460)) x (Ps/29.92) i 

### , Dry Volumetric Flowrate at Standard Conditions i Qd ! dscfm 

## I 81,274 80,562 78,075

Qd = Qa x (1-(MC/100)) x (528ITsr) x (Ps/29.92) Nozzle Cross-Sectional Area 

### ! An sq. ft i 0.000534 0.000534 0.000534

An =( 3.14 x DnA 2) 1(4 x 144) Isokinetic Variation

1= (0.0945xTsrxVm)f(PsxVsxAn x theta x(1-(MCf100))) ! I % 100.0 i 99.2 I 99.1

Particulate Concentration I I Dry Catch Cs(dry) = 15.432 x M dry / Vmstd I Cs(dry) 

## I gr/dscf ! 0.0772 0.0497 i 0.0665 Wet Catch Org Cs(org)

## =15.432 x M org I Vmstd 

### I CS(ol]) gr/dscf 

### i 0.0000 0.0000 0.0001 Wet Catch Inorg Cs(inorg) = 15.432 x M inorg IVmstd I CS(inorg) ! gr/dscf i 0.0019 I 0,0009 I 0.0006 

### , Total Cs

## =15.432 x Mn IVmstd Cs 

### : gr/dscf 0.0791 0,0506 

### i 0.0672 Particulate Emissions Rate, Dry Catch Only

E(lblhr) = Cs(dry) x Qd x 60 17000 Edry 

### ! Iblhr 

## i 53.8 34.3 ! 44.5 Particulate Emissions Rate, I I Dry Catch+Organic Wet Catch I E(lblhr) = Cs(dry)+Cs (oro) x Qd x 60 17000 ! Edry+org i Iblhr 53.8 34.3 44.6 Particulate Emissions Rate, 

## i

Dry Catch+Organic Wet Catch+ Inorganic Catch E(lblhr) = Cs x Qd x 60 17000 Etot Iblhr 

### , 55. 34.9 45.0ClllIs Natura! Resources In: i..Jnne::: Ta.:::mne, L!....::**FD~De.s,** M nneso\2; Barr ::'nglneenn;'l :::0**Ja~uar.;** 2C. 2C1C**DeI9~rr.!nation o~**  VO!u.'T'retri: Alrl!:)w hal;:: Ga.s ::';OrTI.:)DSIt!:J:-', i

...**~ClIS!Ui'e** Conten:, ar,d Part!:ulaie :;:m:sSlons ::p,i., r:19!no:Js r :::,.:,::.. :JTtv',J25

Average Moisture Content of Sta:k Gas

t

..**~:::** 

### ={(.D4i07 x**V'tic+.O~715·Vwsg)I((,O':707** >: 

### v.·..**:::-.O~715·V**..·:sg, - IVmstj))), iCO MolecularWeight of Stack Gas, 0:)'

t.'id =**(O,44x(%:::02)1"'(C.32x(%02)).,..(O.28x!~,oN2-~~::O))** Molecular Weigh! oi Stack Gas. we:

Ms = Md x {1-(M8!10Q)J-18 x (M8/1 00) Average Stack Gas Velocity

Vs 

### =85,49 x CD x (d?y-o.5 x {(Tsr!(Ps x 1"is)),,{),5\ Actual VOiumetri::: Flm'Jr3te

De = 60 x Vs x A Volumetric FJowrate at Standard Conditions

05 = Oa x (5281(Ts+460)) x(Ps'29.92) Dry Volumetric Fio\'o'rate al Standard Conditions

Qd 

### =Oa x (1-(MCl100)) x (528/Tsrj x (Ps/29.92) Nozzle**Cross~Sectional** Area

An =( 3.14 x On"2)/(t. x 144) lsokinetic Variation

I::: (O.0945xTsrxVm)!(PsxVsxAn x theta x(i-(t,

..'0100))) Particulate Concentration

Dry Catch Cs(dry)

### =15,432 x M dry I Vmstd Wet Catch Org Cs(org) 

### =15.432 x M org,' Vmstd Wet Catch !norg CS(inorg) 

### =15.432 x**~.i** inorg" Vms\d Tota! Cs =: 15.432 x Mn / Vmstd Particulate Emissions Rate, Dry Catch Only

E(lb!hr) 

### =Cs!dcj) x Dd x 60 17DOO Particulate Emissions Rate,

Dry Catch-+Organi: \'Vet Catch E(lb!hr) = CS(dry)+Cs (org) x Od x 6D! 7000 Particulate Emissions Rate,

Dry Catch

...Organic Wet Catch-+ Inorganic Catch E(lblhr) = Cs x Dd x60 17000 t,/.s

Vs

Oa

05

Od

An

Cs(dry) Cs!org) CS(inorg}

Cs

Edry'

Edry-org I

:::IO! \:)/lbmol 27.72 27.86 27.70

IUse8 57.33 57.51 57.07

acfm 405,411 406.698 403.564

scfm 347,421 347,925 345,294

dsclm 305,891 310,800 303,292

sq. It 0.000250 0.000250 0.000250

% 97.3 96.3 98.8

gr/dscf 0.0158 0.0099 00131 grJdscf 0.0001 0.0002 0.0002 gr/cscf 0.0045 0.0044 0.0063 gr/dscf 0.0204 0.0145 0.0197

Ibihr 41.3 264 34.i

Ib/hr 41.6 26.9 34.7

lbihr 53.4 36.7 51.2

## Cliffs Natural Resources Inc. United Taconite, 

## LLC Forbes, Minnesota Barr Engineering Co. January 26, 2010

Line 2A Waste Gas Stack (SV048) Bias Corrected Reference Method Data and Emissions Calculations O2 

### Calibration, %, dry Run 1 Run 2 Run 3 Test Date 

### 12/10109 12/10109 12/10109 Run Time 1102-1209 1239-1345 1413-1519 Zero Initial 0.1 0.1 0.1 Final 0.1 0.1 0.1 Mid Range Initial 20.0 20.0 19.9 Final 20.0 19.9 20.0 Cal Gas Value 20.0 20.0 20.0 CO2 

### Calibration, %, dry Run 1 Run 2 Run 3 Zero Initial 0.0 0.0 0.0 Final 0.0 0.0 0.0 Mid Range Initial 4.0 4.0 4.0 Final 4.0 4.0 3.9 Cal Gas Value 4.0 4.0 4.0 S02 Calibration, ppm Run 1 Run 2 Run 3 Zero Initial 2.7 4.5 4.2 Final 4.5 4.2 2.4 Mid Range Initial 260.6 260.0 261.2 Final 260.0 261.2 261.4 Cal Gas Value 261.9 261.9 261.9

Concentration Run 1 Run 2 Run 3 Average O2 

### %, dry 18.1 18.1 18.1 Average C02, %, dry 2.0 2.0 2.0

Average S02, ppm 211.6 212.7 212.1 CO2 

### %, dry Bias Corrected 2.0 2.0 2.0 O2 

### %, dry Bias Corrected 18.1 18.1 18.1 S02, ppm Bias Corrected 212.3 213.0 212.0 Airflow Rates 

### * Run 1 Run 2 Run 3 ACFM 405,411 406,698 403,564 SCFM 347,421 347,925 345,294 DSCFM 305,891 310,800 303,292 Emission Calculations Run 1 Run 2 Run 3 S02,lb/hr 647.9 660.5 641.5

# I~" 307 304 301 r IblMM Btu S02 

## I 2.1 2.2 2.1 * 

### Airflow rates performed dUring Method 

### 5/0TM028 testing

## Cliffs Natural Resources Inc. United Taconite, LLC Forbes, Minnesota
EPA Method 7E (12 Pt) Stratification test Line 2A Waste Gas Stack (SV04S)

PortA
Port B

Average Maximum Minimum

# IMax-avera~e Average-min
Max read % difffrom avg Min read 

## % difffrom avg 1
1
4 

## 02 1S.1
1S.1
1S.1

1S.1 1S.1 1S.1
0.0 0.0
O.OS 0.06
If < 5 percent sample from mean point in stack If> 5 and < 10 pick 3 pOints 16.7, 50 in 83.7 1{>lOperfortn 12points69neachtraverse· 

## C02
2.0
2.0
2.0

2.0 2.0 2.0
0.0 0.0
0.47 0.72 Barr Engineering Co. January 22, 2010



## 502
209.2
215.3
210.1

211.5 215.3 209.2

3.7 2.3
1.77 1.0SClif!s**I~al:';iai** n8SCiJfCeS jn,: unnec la:::'0:1112, LL: roroes. Minnes0i2

Determina!lon 0: VOI:Jmelfl:': AiriJO'" Ralf:.**Ga~** COmOJ51lIor

..**i'.~Dlsture** ':Cf11en:. anj Pamculale**~m:ssions E~A**  t,,1elnGjS 2, 3 . ..:, 5 :JTM02B
:....!ne 22 Was!:? Gas Sla:::r,**(SVO~;**

Run Time ?anl::u!a;e Load:ng

V'Jet Gat.::::n Organl':: Fraello!, V·Jet Catch lnorgan:::::**~ra::::lior,** TCla! (Dl"'j Cat:::n

-**O~gani::** Vie: C-a:::::n

!831::UI31ed Data )AV8rage AnsDlule Sta>: temOeralUre (;;1

IS!

### =lsi

- 45C**S;ao~** Prassure Ps 

### =Poar

- Pc; 13.5 Du::t Area

Meter Volume a: Stanoard CC:loiticns

VIT';5iO 

### =17.6':x Vm >: Y x {(?oa,**~(DH!~3,6)LTm~,** Average tv10isture Cement of 5ta:::.: Gas

Me", ((.0':707 x V"'.-:::-.O':'715·\!wsgi'i:.O':'iO":'). v'

....**-:-.D..:.7~5·VwSC;;·i** - (Vms!d)) x 100 Mo!e:.u:ar Weight of StaSr: Gas. ary

rAe::::**(0.44x(%C02))+{D.32x(';;02))-{0.2Bxf";!;;N2-~!;;CC'r** Molecular Weight 0; Stack Gas, wet

t

..1s::::: Mo x (1·{M8110·J))-18 x (M::::!10D) Average Stack Gas Velocity

Vs : 85.49 x Cp x {dP)t·O.5 x{(isrl(Ps x Ms)!'-'O 5') Actual Vo!umatri: FIO'o';iale

Qa: 60 x Vs x A VOlumetric Flowrate at Standard Conditions

Os = Qa x (528/(Ts+460») x {Ps/29.92) Dry Volumetric F!owrate at Standard Conditl8ns

Od -= Oa x**(1~{MC/10Q)** x (528fTsr) x (Ps/29,92) Nozzle Cross-Sectional Area

An =(**3.1~** x 00'2)**/I~** x 144) ISakinetic Variation

I", (O.0945xTsrxVm)I(PsxVsx,A.n x theta x(1-(MC.'100))) Particulate Concentration

Dry Catch Cs(dry) 

### =15.432 x**tv~** dry / Vmstd Wet Catch Org Cs(org) = 15.432 x tJ1 org I Vrnstd WeI Calch Inorg Cs{inorg) -= 15432 x M Inorg IlJmstd Tota! Cs =: 15.-43.2 x Mn I Vmstd Partk::uJate Emissions Rate, Dry Catch Only

E(lb!hr) = Cs(dryj x 0:1 x 60 i 7000 Particulate Emissions Rate,

Dry Catch+Organic Wet Caten E(lb!hr) 

### =Cs(dry).Cs (org) x Od x 6o!7000 Particulate**~missions** Rate,

Dry Cateh+Organic Wet Catch

... Inorganic Catch E{lb/hr) = Cs x Od x 60 / 7000
Note: Moisture Content limited to moisture at saturation r.:lc tJ1r,
SymDJ, Units

15- oegrees Po

Ps :hg**~.** Sq I,

Vmsid CUD::: lee:
;,.riC e,;:- Vo

t/ic l::Jii;)m:;1

j../:5 iu.'!oma:

Vs iUse::

Oa a:::..irn



### as
1 setm 

### ad os::tm

An 

# : sq. It**~,~**

Cs(dry) grJose! C5(org) grfdscf I CS(inorg) I grldscf Cs gridscf
Edry lalnr

Edry.,.ora lornr

Etat Ib'hr 0,0290 O.023-!

;:;un 1 Run 2 582 57E

26.81 ,
115.659 ! 116.55& 

## -'. 36.35 37.63

11.20 

### ! 11.00 see note 29.00 29,01
27,76 27.88**5~.37** 53.9.!
360,546 3, f,54L

332,562 332,174



### ! 295,104 295,635

0.000250 0.000250

95.0 99.2

0.0077 0.0057 0.0001 0.0001 0.0045 0.0028 0.0123 0.0096

19.5 16.9

19.7 17.3

31.2 24.3 0.0287

Mun S 579**~** 16.659**37.S~**

see nGle

27.1(**5~.25** 379,709

333.502
295,763

0.000250

99,5

0.0875 0.0002 0.0040 0.0117

19.1

197

297

## Cliffs Natural Resources Inc. United Taconite, LLC Forbes, Minnesota Barr Engineering Co. January 26, 2010

Line 2B Waste Gas Stack (SV049) December 8, 2009 O2 

### Calibration, %, dry Run 1 Run 2 Run 3 Run Time 1043-1152 1227-1336 1428-1555 Zero Initial 0.1 0.1 0.0 Final 0.1 0.0 0.0 Mid Range Initial 20.0 20.0 20.0 Final 20.0 20.0 19.9 Cal Gas Value 20.0 20.0 20.0 CO2 

### Calibration, %, dry Run 1 Run 2 Run 3 Zero Initial 0.0 0.0 0.0 Final 0.0 0.0 0.1 Mid Range Initial 4.0 4.0 4.0 Final 4.0 4.0 4.0 Cal Gas Value 4.0 4.0 4.0 S02 Calibration, ppm Run 1 Run 2 Run 3 Zero Initial 4.1 3.5 2.2 Final 3.5 2.2 4.3 Mid Range Initial 255.2 259.8 258.9 Final 259.8 258.9 260.3 Cal Gas Value 261.9 261.9 261.9

Concentration Run 1 Run 2 Run 3 Average O2 

### %, dry 18.4 18.5 18.4 Average C02, %, dry 1.7 1.7 1.7

Average S02, ppm 143.4 146.4 148.3 CO2 

### %, dry Bias Corrected 1.7 1.7 1.7 O2 

### %, dry Bias Corrected 18.3 18.5 18.5 S02, ppm Bias Corrected 144.1 146.5 148.2 Airflow Rates* Run 1 Run 2 Run 3 ACFM 380,546 377,544 379,709 SCFM 332,562 332,174 333,502 DSCFM 295,104 295,635 295,783 Emission Calculations Run 1 Run 2 Run 3 S02,lb/hr 424 432 437 In.

..... 

### Heat Input MMBTU/hr 260 259 261 Emission Factor Ib/MM Btu S02 1.6 1.7 1.7 *Alrflow rates performed dUring Method 

### 5/0TM028 testmg

## Cliffs Natural Resources Inc. United Taconite, LLC Forbes, Minnesota
EPA Method 7E (3 Pt) Stratification test
Line 2B Waste Gas Stack (SV049)

Point A
Point B
Point C

Average Maximum Minimum

# IMax-avera~e Average-min
Max read 

## % difffrom avg Min read 

## % difffrom avg 1
1
4 

# 02
18.4
18.3
18.3

18 18.4 18.3
0.0 0.0
0.27 0.15
If < 5 percent sample from mean paint in stack If> 5 and < 10 pick 3 paints 16.7, 50 1n 83.7 If>1() perforrn12Polnts6oneach.traverse 

# C02
1.7
1.7
1.7

2 1.7 1.7
0.0 0.0
1.28 1.60 Barr Engineering Co. January 22, 2010



# 502
133.6
146.2
149.2

143 149.2 133.6

6.2 9.4
4.33 6.56Cliffs Natural Resources Inc. United Taconite, LLC Forbes, Minnesota Barr Engineering Co. January 22, 2010

Determination ofVolumetric Airflow Rate, Gas Composition, MOisture Content, and Particulate Emissions EPA Methods 2, 3, 4, 5
Line 1 Kiln Cooler New (SVl16) Input Data Svmbol 

### I Units j Run 1 I Run2 Run3 Test Date 

### , 12115/2009 i 12115/2009 • 12115/2009 

# - - Test Period j 823

- 1032 

## i 1100 -1428; 1451

- 1654


# - - I Number of Sample Ports i 

# - I


# - 2 2 2 Number ofTraverse Points 

## i I



# - I


# - i 24 24 24 Duct Dimensions (diameter or Length x Width) I D,LXW 

## i inches I 60.00



## . 60.00 60.00 Barometric Pressure 

### i Pbar in. Hg 28.90 

### . 28.90 28.90 

### , Stack Static Pressure 

## i Pg 

## : in. H2O I 

### I 0.17 0.17 0.17 Average Stack Temperature, dry bulb Tsf 

## I degrees F i 60 57 57 I Actual Dry Gas MeterVolume 

### ! Vm 

### I cubic feet 

## I 70.94 i 70.88 I 70.30 I ! Dry Gas Meter Calibration Factor 

### : y 

### , - 

### ! 0.9886 I 0.9886 0.9886 Average Orifice Meter Pressure Drop 

### ! DH i in H2O 

## i 1.23 1.22 1.20 Average MeterTemperature i Tmf 

# r degrees F 36 i 39 43 Pitot Tube Coefficient 

### I Cp 

## i I 0.840 , 0.840

• 0.840


# - I Average Square Root of Velocity Head ! (DP)'0.5 

### ,



# - 0.532 0.530 0.523 ! I Volume ofWaterVapor Condensed in Impingers Vwc ml 4 4 7 Mass ofWater Vapor Collected in Desiccant Vwsg 

### : g 1 20 20 20 Orsat Results, Dry Basis I, \

Carbon Dioxide %C02 %vlv 

## i 0.03 i 0.03 0.03 Oxygen %02 %v/v 20.9 20.9 

### . 20.9 Carbon Monoxide + Nitrogen 

# - j %v/v I 79.1 79.1 79.1 !Nozzle Diameter i Dn in 0.252 0.252 0.252 !Run Time theta , min 120 120 120 Particulate Loading :

Dry Catch 

### i Mdry g 0.0050 0.0045 

### , 0.0042

Calculated Data 

### : Symbol Units Run 1 Run 2 Run 3 Average Absolute Stack Temperature (R) I Tsr degrees R I 520 517 517

Tsr = Tsf + 460 ! 

### I i Stack Pressure j Ps 

### ! in Hg 28.91 28.91 28.91

Ps = Pbar + Pg 113.6 Duct Area 

### : A 

## i Sq. ft I 19.635 19.635 19.635

A= LxW/144 Meter Volume at Standard Conditions Vmstd cubic feet I 72.26 I 71.76 70.65

Vmstd = 17.64 x Vm x Y x «Pbar+(DH/13.6))/Tmr) : ,

, Average Moisture Content of Stack Gas 

## . MC I % Vol 1.54 i 1.55 1.59 I MC = «.04707 x Vwc+.04715'Vwsg)/«.04707 xVwc+.04715'Vwsg) + (Vmstd)) x 100 i see note I MolecularWeight of Stack Gas, dry 

### I Md Ib/lbmol 28.84 28.84 28.84**Md~m** i , MolecularWeight of Stack Gas, wet Ms j Ib/lbmol 28.67 28.67 28.67

Ms = Md x (HMC/l00))+18 x (MC/l00) 

### !

• Average Stack Gas Velocity : Vs ftlsec 30.27 30.06 29.64

Vs = 85.49 x Cp x (dP)'0.5 x «Tsr/(Psx Ms))'0.5) 

### : ; Actual Volumetric Flowrate Qa acfm 35,661 35,414 34,921

Qa =60xVs xA i i , Volumetric Flowrate at Standard Conditions , Qs 

# -: scfm \ 35,024 34,921 34,447

Qs**~** Qa x (528/(Ts+460)) x**(P~I?!'l** !'l?\ Dry Volumetric Flowrate at Standard Conditions Qd

• dscfm 

### ! 34,484 34,379 33,899

Qd = Qa x (1-(MC/l00)) x (528/Tsr) x (Ps/29.92) i Nozzle Cross-Sectional Area An sq. ft 0.000346 0.000346 0.000346

An =( 3.14 x Dn'2) 1(4 x 144) Isokinetic Variation I % 

### , 99.1 98.7 , 98.5

1= (0.0945xTsrxVm)/(PsxVsxAn x theta x(I-(MC/l00))) Particulate Concentration j

Dry Catch Cs(dry) = 15.432 x M dry I Vmstd Cs(dry) gr/dscf 0.0011 , 0.0010 0.0009 Particulate Emissions Rate, Dry Catch Only

E(lb/hr) = Cs(dry) x Qd x 60/7000 Edrv Ib/hr 0.32 0.28 0.27
Note: Moisture Content limited to moisture at saturation

# Appendix B
Field Data Sheets

# BARR
PrClject 

# V.I 

# V'\ (.**--:-"~'--'----,;-:-----** Sampls Location 

# L; "'$ \ 

## C 

## V) 

# r LI**~** 

# '1 

# r Dats 

## 1 Z - }\., -.i " DDsrators 

## 0\"-1.:.- / A 

# ff Due: Dimensions J

## I 

# '1

.u inches Port Length 

### 1'2.

# i-C incnes 

### Plio: Tubs No. 

# S .-

# J Cp ().'\, 

## 'f Manomste:' 10 

## C - f 8ar. 10 

## Vl"l( Digitai Them: 10 

### C - 1 T.C. 10 

# 5"

_:)

.

Traverse Point Iniormation Cyclonic Point Inches From: Fiovi Run i Number \i-/aii 

# I POri /£:' \p 

# PI-lit**(~ 2,)~**  

## f\',I.'6 ( 

# If; 

# f 1·9"1- 7\1·+1- 

# I**~ l~** **~** 

## I . I \L-j.G 

## Iv 

## 110.'1>\ 

## 0 

# Y 

# 11 3) i

# '21.~**~** 

# I

# 33.{i I \ 

# r 119J.cl'Ii..S,," 2..**~** 

# \t I**q1.~**'L 

# I \),'-1- 

## 1...- 

# &

- (Cl; \ 

# I I 1.. 

# Lf I

## ~**~,** 

# I 0 

# i**~\** 

# I C 

# .r""4 I D \. 

# t I 7 

# c.-\\} 

# I I l. \ 

# I I 1. ...; J 

# I I '1 ) 

# I**o~** 

# I l..- 

# I' I I 0- I

# ~ 

# I 

# I 1. 

# r I 

# ) Yl I**~** 

# )\ 

# I



# r---t**~** 

# (/

Schematic oi Duct Cross-Section 

## EPA METHOD 2 FIELD DATA SHEET 

# I RUr1 i

I,iois: :;omem - 

### c., 

## I

PilOI LS2k 

### CnscL Positive: Velocity Head

- inches HoO



## I Rur; 

### 2: 

# I**riU~i** 

### 2 

# I Run 4 

# I ,\? I \f=' ,\p I I 

# I I 

# I I i 

# I I I I 

# I I 

## I I ! 

## I 

## I I
I ! 

# I j 

# I I 

### I I 

## I 

## i 

# I I I i I 

# I I I 

# I I 

### I
I 

# I I I 

## i I 

# I I 

# I I

1 

# I I I 

# I I 

# I 

# I 1 

# I I


# , ! I I I 

# I I 

# I I 

# I I I I 

# I I 

# I I

... Run 1 Stack Pres.

- In Hg 

# I Duct Area

- Sq Ft. 

# I Mole Weight

- Md Mole Weight

- Ms Avg. TemD.

- OF**Average~** 

# I Gas Vel- FtlSee ACFM SCFM DSCFM Ru;; 2 Run 3 Run**~**



# I 

# ()**~c....** hJsgaiive:
Stack Temperature

- of Run 1 

# I Run 2 

# I**RU~13** Hun L 

### lam:J. Tame. Temo. Temo. 

# I I 

# I I 

# I I I I I I I 

# I I I 

# I I 

# I 

# I I 

# I I I I I 

# I I 

# I 

# I I 

# I

1 

# I I I I 

# I I 

# I I 

# ! I

, I 

# I I 

# I I I I

I Run 2 Run 3 Run 4 

# I I I I I IBarr EPA METHOD 5 - FIELD DATA SHEET - RUN 1 Engineering Company Project Cliffs Natural Resources Inc. Train C-1, S-1, P-6 Pitot Tube No. 5-3

______________**~p~~1Q** Sample Train Leak Rate, cfm: SampJe_Location$\l047 Line 1 Pellet Cooler EJ<haust Meter Y 0.9986 Bar.Press. 28.95 in. Hg Pretest 0.000 at 10 in. Hg Date 12/16/09 Test 1 Run # 1 Orifice H@ 1.9163 Stat Press. -0.22 in. H20 Posttest 0.000 at 7 in. H Operators DJKlAPP Probe Lenqth 5 ft. Probe Liner Tvpe: 1 Inconel 10ther
Sample Point
Start Time
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
End Time RunTime Sample Time DT

0819 2.5 5.0 7.5 10.0 12.5 15.0 17.5 20.0 22.5 25.0 27.5 30.0 32.5 35.0 37.5 40.0 42.5 45.0 47.5 50.0 52.5 55.0 57.5 60.0
0933 60 Integrated Gas Sampling Data: Box No. NA Actual Meter Vol Vm,ft3 225.63 227.12 228.70 230.20 231.75 233.13 234.58 235.62 236.98 238.10 239.18 240.21 241.20 242.60 244.10 245.77 247.42 249.02 250.51 252.00 253.38 254.80 256.13 257.47 258.71 Velocity Head DP,

in. H20 Orifice DH in. H20



### .::::::::::':::::::::'J:::':::: ::::. ::::::' 0.220 1.16 0.250 1.25 0.260 1.33 0.290 1.35 0.200 1.03 0.220 1.10 0.140 0.75 0.140 0.76 0.120 0.66 0.110 0.63 0.100 0.56 0.100 0.57 0.220 1.16 0.280 1.35 0.340 1.53 0.360 1.62 0.300 1.38 0.280 1.35 0.230 1.14 0.220 1.10 0.190 1.03 0.190 1.05 0.160 0.89 0.150 0.79
AI/gDH- 1.06
Leak Rate NA cclmin Ideal Point Volume

Vm,ft" 

## :::::::':,::::::::::::1::: 1.43 1.49 1.54 1.55 1.35 1.40 1.15 1.16 1.09 1.06 1.00 1.01 1.44 1.55 1.65 1.70 1.57 1.56 1.43 1.41 1.36 1.38 1.27 1.19 Ideal MeterVol Vm,ft3
227.06 228.55 230.09 231.64 232.99 234.39 235.54 236.70 237.79 238.85 239.85 240.86 242.30 243.85 245.50 247.21 248.78 250.33 251.76 253.17 254.52 255.90 257.17 258.36


## ,:,:,:,:,:,:,**,:~ ~:':'I>::=:::'.""**  404232 Sample Train Vacuum in. Hg 

## :::::::::::::'::j::'y,y,

. Stack Temp Ts:F

'::: ;:::::: 565 620 599 702 590 620 550 538 522 477 511 480 565 666 746 749 718 667 640 624 546 518 512 565 Sample Train Temperatures. OOF Filter Probe Impinger Meter Outlet Inlet 

### :;:;:;:::: ·:::::::::::::::::::::I:::::::::::::::::::::::=t:::::::. 35 38 36 35 36 36 36 37 37 37 37 37 38 39 40 40 40 40 40 40 40 40 40 41
::!Avg Ts- 595.42 

## I,::: ::::::::::: :::**A~ ~"** **~<** 

# »>1::;,,:,:,:,:........ IAvgTmMOISTURE RECOVERY DATA: 

### :::" Meter Outlet 

## ::::: :nT:'" 33 33 34 34 34 34 34 35 35 35 35 35 36 36 36 36 37 37 37 37 37 37 37 38 Oxygen Content,

%

20.9

36.81**I:::,~,~::,:::::::"·** Impinger 1 2 3 4 Desiccant Total ;:;:

Bag No. Bag Vol. NA O2 Reading NA % Filter No. Nozzle No. Nozzle Dn. 3-10 Final wi., g 92 108 100 0 1050:::::::

# >: :::::::::. NA O2 Analyzer No NA 0.313 Initial wi., g 100 100 100 0 1043 

## ;::::::::::::::/HH Difference -8 8 0 0 7 7Barr EPA METHOD 5 - FIELD DATA SHEET

- RUN 2 Engineering Company Project Cliffs Natural Resources Inc. Train C-1, 5-1, P-6 Pitot Tube No. 5-3 Cp 0.840 Sample Train Leak Rate, cfm: Sample Location SV047 Line 1 Pellet Cooler Exhaust Meter Y 0.9986 Bar.Press. 28.95 in. Hg Pretest 0.000 at 10 in. Hg Date 12/16/09 Test 1 Run # 2 Orifice H@ 1.9163 Stat Press. -0.22 in. H20 Posllest 0.000 at 7 in. H Operators DJKlAPP Probe Lenoth 5 fl. Probe Liner Tvpe: 

### I Inconel 

### IOther Sample Ideal Sample Oxygen Sample Time Actual Velocity Orifice Point Ideal Train Stack Sample Train Temperatures of Content,

Point DT Meter Vol Head DP, DH Volume Meter Vol Vacuum Temp Filter Probe Impinger Meter Meter % Vm,fl3 in. H2O in. H2O Vm, fI' Vm,fl3 in. Hg Ts:F Outlet Inlet Outlet Start Time 1019 259.01 .;.: ::::::::;::.:. 

### ::;:;:::::: .::::.::::: : 

### ,. :.:: .....

## ::::::::::::::::: ,,<:::: ';::::::::. '<: :::;:; 

### :;:;:; ::: ::: ::;:::: 

### :::::: ::;: :::::.

... 

## ;.:::::::::::: :':': ;",":-." :::;: 

### ::::.:::'::. : 

## .:::::: ::::::;:;::::::::::: 1 2.5 260.12 0.110 0.68 1.11 260.12 410 39 38 20.9 2 5.0 261.40 0.130 0.76 1.17 261.29 460 39 38 3 7.5 262.44 0.120 0.66 1.08 262.37 526 40 39 4 10.0 263.55 0.110 0.61 1.05 263.42 512 40 39 5 12.5 264.59 0.100 0.58 1.02 264.44 478 41 39 6 15.0 265.63 0.100 0.57 1.01 265.45 488 42 40 7 17.5 266.97 0.190 0.99 1.34 266.79 575 43 41 8 20.0 268.40 0.200 1.01 1.35 268.14 610 43 41 9 22.5 269.75 0.220 1.11 1.42 269.56 611 44 41 10 25.0 271.10 0.170 0.92 1.29 270.85 542 45 41 11 27.5 272.40 0.160 0.92 1.29 272.14 489 45 42 12 30.0 273.73 0.180 1.06 1.38 273.52 467 45 42 13 32.5 275.30 0.270 1.41 1.60 275.12 580 45 42 14 35.0 276.92 0.280 1.40 1.59 276.72 626 46 43 15 37.5 278.57 0.330 1.57 1.69 278.40 688 47 43 16 40.0 280.21 0.340 1.61 1.71 280.12 691 47 43 17 42.5 281.80 0.310 1.37 1.58 281.69 776 48 44 18 45.0 283.35 0.270 1.22 1.49 283.18 754 48 44 19 47.5 284.78 0.190 1.05 1.38 284.57 530 48 44 20 50.0 286.23 0.230 1.20 1.48 286.04 590 48 45 21 52.5 287.71 0.240 1.18 1.47 287.51 654 48 45 22 55.0 289.12 0.220 1.09 1.41 288.92 647 49 45 23 57.5 290.57 0.220 1.10 1.42 290.34 634 49 45 24 60.0 291.97 0.210 1.09 1.41 291.75 592 49 45
End Time 1126 RunTime 60 AVQ DH= 1.05 

### :**~**

### :**~**

### :**~**

### :**~**

### :

## ;:**::~:~:~:~ ~:j:j:~:!:~:~:**  Avq Ts= 580.42 :;:;:;:;:;: :>' ;:;:::: "**<.):~ ::::~:**  :

### : ' : : :.: :::::::: 

### :**~**

### :**~** AvgTm= 43.48 

# nn:**:~:~:~ ):):~::**  Integrated Gas Sampling Data: MOISTURE RECOVERY DATA: Box No. NA Leak Rate NA cclmin Filter No. 404233 Impinger 1 2 3 4 Desiccant Total Bag No. NA O2 Reading NA % Nozzle No. 3-10 Final wi., g 93 102 100 0 1061 ::::::::::> .:.;.:.'.' Bag Vol. NA O2 Analyzer No NA Nozzle Dn. 0.313 Initial wi., g 100 100 100 0 1050 

# 1/ Difference -7 2 0 0 11 6Barr EPA METHOD 5 - FIELD DATA SHEET

- RUN 3 Engineering Company Project Cliffs Natural Resources Inc. IrainC--1,-S-1, P-6 PitotItllJl3 No. 5-3 0.84L_ Sample Trainl.E!£lKB£lte, cfm: Sample Location SV047 Line 1 Pellet Cooler Exhaust Meter Y 0.9986 Bar.Press. 28.95 in. Hg Pretest 0.000 at 10 in. Hg Date 12/16/09 Test 1 Run tI 3 Orifice H@ 1.9163 Stat Press. -0.22 in. H20 Posttest 0.000 at 7 in. H Ooerators DJKlAPP Probe LenQth 5 ft. Probe Liner Tvpe: 1 Inconel 1 Other

Sample

Point
Start Time
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Sample Time DT

1156 2.5 5.0 7.5 10.0 12.5 15.0 17.5 20.0 22.5 25.0 27.5 30.0 32.5 35.0 37.5 40.0 42.5 45.0 47.5 50.0 52.5 55.0 57.5 60.0
End Time 11302 RunTime 60 Integrated Gas Sampling Data. Box No. NA Bag No. NA Bag Vol. NA Actual Meter Vol Vm,ft3 Velocity Head DP,

in. H20 Orifice DH in. H20 Ideal Point Volume

Vm,ft' Ideal Meter Vol Vm,ft3 Sample Train Vacuum in. Hg 292.26 

### ::;: 

## ::::**":~:::::::,,:,:,** 

# """",:t:",:::: ;.: 

# ><,'1:,:,:,:, ::::1:::,,:,,:::::;. 293.65 0.190 295.20 0.250 296.71 0.210 298.22 0.260 299.89 0.310 301.37 0.220 302.78 0.200 304.42 0.330 306.18 0.320 307.72 0.340 309.31 0.310 310.89 0.280 312.20 0.160 313.47 0.160 314.72 0.130 315.97 0.150 317.20 0.130 318.28 0.110 319.40 0.120 320.52 0.100 321.60 0.090 322.59 0.080 323.60 0.090 324.53 0.070
Avg DHLeak Rate NA O2 Reading**~** O2 Analyzer No NA 1.00 1.36 1.31 1.54 1.20 1.48 1.36 1.57 1.51 1.66 1.17 1.47 1.11 1.43 1.59 1.71 1.48 1.65 1.47 1.64 1.39 1.60 1.37 1.58 0.88 1.27 0.85 1.25 0.76 1.18 0.88 1.27 0.77 1.19 0.65 1.09 0.69 1.13 0.59 1.04 0.54 0.99 0.49 0.95 0.53 0.99 0.41 0.87

1.00
cclmin%**:)~~:~:~:~:** Filter No. Nozzle No. Nozzle Dn. 293.62 295.16 296.64 298.21 299.87 301.34 302.76 304.47 306.12 307.76 309.35 310.94 312.20 313.45 314.64 315.91 317.09 318.18 319.31 320.35 321.35 322.30 323.29 324.16 

## d< ::,
.... <: ,:;:;IAvg Ts404234

3-10 0.313 Stack Temp 

### TS,oF Filter Sampi13 J:rairLTemperatures. of Probe Impinger Meter Outlet Inlet -.:.; 

### ::!::;;-.-. 

## "T=::T:::I,:"""""":"::,:,,,I,:,,,:,:,,;:,:,::::. ,:::::
.., ::',<,: ,:1,:

585 47 590 48 505 48 593 48 667 49 571 49 529 49 679 50 730 50 816 51 773 50 664 51 547 51 578 51 478 52 485 51 477 51 472 51 496 51 474 51 462 51 440 52 474 52 481 52

565.25 

## ",::::l;:::: :":"'" ::: :,:, ':':',',>JAvg TmMOISTURE RECOVERY DATA: Meter Outlet
46 46 46 46 47 47 47 47 48 48 47 48 48 48 48 49 49 48 49 49 49 49 49 50

49.04 Oxygen Content,

%

:;:;:;

20.9

-<:>- Impinger 1 2 3 4 Desiccant Total Final wt., g 92 104 100 0 1068:'

# »»>1 Initial wt., 9 100 100 100 0 1061 

# :1 Difference -8 4 0 0 7 3

# BARR

-- Project 

# \A\/1c EPA METHOD 5 FIELD DATA SHEET
Mele!y 

# u.qSyl

- -**2~,1\),** Rm, Pies III I-In Saml:Jie tJaill**'=~~\flatfiJ~f!lIL**________ nUll 1 

# j n'02 Smpl Lac 

## Li v'h- 

## I C0'::, 

## 5u 

## t:.'/':;-Tesl No, RUlls 1, 2 

### "'II Cii>**1.(,111a'~** Sin!. Pres 

### 'l'l.L L 111 H2O Prelcsl 

### t:.·u at 

# r"" in Ilg Protest 

## 6 01 

## /0 in I If] Cp 

# 0,8>- Prohn Lllqtll

_ 

# s::.-=f! Posttost 

### \J ,0 at 

# -1= 

# ------'1--- Pitot No,**,5~~3** 

# __ Date ,

### Z '\\0.

-**'C('~** in Ilg Posttest L1 ,(,) at in Ilg Operator

### ~L**)~(P** CM_I_ SM

# -',- P

# _b_ Lillnr Ty!'n: I:'IGlnss [IS.8,

### "~Oliler 

## :lI-L, Pilut (3 itL) Pas,**~>J,** 

# I2r Pitot (3 ill,) Pus,**~Q,** 

# d-- ,. TEST nUN 

### I ----. . -_._- .- 

### - . .-.- ----._- 

## - _ ..

### _.__.. 

### _._ .. ... _ ..

### _- - -**~~.-** . _ ..

### _-

_.. --- TEST nUN 2 Sample Sample Moter Velocity Orifice Tlnin Stael( Sample Train TOIIIIl, "I' Mf!Wr Meter Meter Volocity Griner Trnin Sinel,

__**~~~~I!,lnl"_"I'_'**_ Meter Mp.lpr Point Time Volul11e AP, "'1-1, Vnctllun T0I11I', hnpnqr Inlnt Onllet VOhllllP. AI', (\1-1, Vacuttrl' Tmop. hllpngr Inlel OulI,,1 liT Vm, fl" in 1-1,0 in 1-1,,0 in, Ifg Te, "I' Plolm riller Oullol Temp, ''I' TOIllP, "I' Vm, II' in 1-1:,0 in 11,,0 ill. I-Ig Ts, T rlObp. nUn! Ollllel rpl1l(J, "F lelllp, 'I' 

# 1. C')

## .1.1.

--- --- 

## Z.5'lD\

---**s1~-'-** 

## -3\" .- --- .. - 

## ---- ------ -----**----~** 

## ------**-~---.-----** ---_._-- 

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# Appendix C Laboratory Reports and Sample Chain of Custody.-' 

# Cliffs Natural Resources Inc. United Taconite, LLC Forbes, Minnesota Barr Engineering Co. January 27, 2010

Results of Gravimetric Particulate Analysis Line 1 Pellet Cooler Exhaust (SV047)

Filterable Particulate: 

# I Front HalfWash ! 

## Filter 

## i Total Run 

## i Weight, g 

## I Volume, ml 

## I Blank Corr. ! 

## Net Wt., g Weight, 9 , 

## Weight, 9 I I 

## R1 I 

## 0.1698 i 

## 165 I 

## 0.0002 i 

## 0.1696 ! 

## -0.0010 0.1687

, i 

## R2 1 

## 0.1080 125 

# I 0.0001 I 

## 0.1079 -0.0012 0.1067 ! 

## R3 0.1:38 _9 I 

## 125 0.0001 0.1388 -0.0005 0.1383 ; !**~** 

## Blank ; 

## 0.0002 

## i 200 

## i
----- : ----- 

## 0.0000 -----


# Condensible Particulate: Organics: e lYlene on e x rac M th I Chl'd E t t Run Weight, 9 

# I Volume, ml I 

## Blank Corr. I 

## Net Wt., 9 I I i 

## R1 1 

## 0.0001 i 

## 200 : 

## 0.0003 I 

## 0.0000 I 

## R2 

## i 0.0000 

## i 180 

## i 0.0002 

## 0.0000 R3 j 

## 0.0005 i 

## 210 0.0003 : 

## 0.0002 ! I 

## Blank ! 

## 0.0001 I 

## 100 ! 

# ----- ----- 

## Note: 0.0000 Net Wt. in Italics, represents a blank corrected value limited to zero. Inorganics:
Run Weight, 9 

## i DI Volume, ml Blank Corr. Net Wt., 9 R1 0.0051 i 

## 530 0.0010 0.0041 I 

## R2 0.0029 

## i 510 0.0010 0.0019 R3 0.0023 i 

## 574 0.0011 0.0013 ! 

## Blank 0.0007 

# i 370 

# ----- -----

# BARR HIBBING LABORATORY REPORT
PARTICULATE TESTING FRONT HALF GRAVIMETRIC RESULTS
CLIENT 

## United Taconite LLC. PROJECT No. 

## 23691027.03001 003 TEST 

## T1 TEST DATE 

## 12/16/2009 SOURCE ID 

## Line 1 Pellet Cooler Exhaust SV047 SAMPLING LOCATION 

## Stack
AIR FILTERS: 

# 4 INCH GFF

Run Filter ID Description


# R1 404232 C.lean

R2 

## 404233 Clean

PROBE WASH: ACETONE

Run Beaker ID Description

REMARKS

PAGE 1 OF 8 

### Gross Weight 

## 0.63320 0.63308
0.63403 0.63371

Gross Weight ANALYZED ON:
DatelTime

DatelTime 

## 12/18 Tare Weight

Tare Weight 

## 12/21/2Q0910:32 102.23605 12/22/2009 

## 9:01 102.23580 SAMPLES COLLECTED 

## By DJK ANALYSIS PERFORMED 

## By DJK
DatelTime Uncorrected Net Mass (g) 11/17/200913:43 11/18/2009.9:58 -0.00095
11/17/2009 13:44 11/18/20099:57 -0.00116



## -0.00046

-0.00003

Is There Solvent Evidence of DatelTime Uncorrected Sample Net Mass (g) Loss? No

No



## 0.00020 No

1/27/2010

# BARR**------~~--** --- -------- - ----------- 

# HIBBING LABORATORY REPORT
PARTICULATE TESTING BACK HALF GRAVIMETRIC RESULTS CLIENT United Taconite LLC. PROJECT No. 23691027.03001 003 TEST T1 TEST DATE 12/16/2009 SOURCE ID Line 1 Pellet Cooler Exhaust SV047 SAMPLING LOCATION Stack ANALYZED ON 12/23

Run Beaker ID Description

Run Beaker ID Description

GreyResidue



## REMARKS

PAGE 2 OF 8 

### Gross Weight

Gross Weight 

## 98.95717 98.95731 ·100.55939

100.55978 

## ANALYSIS PERFORMED 

## By DJK

DatelTime Tare Weight DatelTime

121291200910:02 

## 100.4477.1 11/18/20099:23 

### Is There Solvent Evidence of Uncorrected Volume Sample Net Mass (g) (ml) Loss?
1212912009.18:51 

## 100:44810**11!18/20m~** 

## 15:48 0.00005 200 No

DatelTime

12129/200910:15 12129/200918:45 

## 96;85998 11/18/200.99:24 96.86039 11/18/200915:48



### Tare DatelTime Weight 

## 98.95191 11/18/2009 9:27 

## 98.95232 1.1/18/200915:45



## 102.13791 102.13780 0.00047

Uncorrected Net Mass (g)



## 0.00513

0.00234 180 No



## 100 No

Is There Solvent Evidence of Volume Sample

(ml) Loss? 

## 530 No

No



## 570 No

1/27/2010

# Cliffs Natural Resources Inc. United Taconite, LLC. Forbes, Minnesota Barr Engineering Co. January 20, 2010

Results of Gravimetric Particulate Analysis Line 2A Waste Gas Stack (SV048)

Filterable Particulate: 

# I Front Half Wash Filter Total Run Weight, g Volume, ml Blank Corr. Net Wt.. g Weight. g Weight, g R1 0.0078 130 0.0001 0.0077 0.0309 0.0386 R2 0.0048 130 0.0001 0.0047 0.0197 0.0244 R3 0.0042 105 0.0001 0.0041 0.0283 0.0324
Blank 0.0002 200
----- ----- 

## -0.0002
-----


# Condensible Particulate: Organics: Methylene Chloride Extract Run Weight, g Volume, ml Blank Corr. Net Wt., g R1 0.0008 335 0.0005 0.0003 R2 0.0009 290 0.0004 0.0004 R3 0.0010 300 0.0004 0.0005
Blank 0.0004 250
----- 

### -----


## Inorganics:
Run Weight g i 

## DI Volume, ml

. Blank Corr. Net Wt., g R1 I 

## 0.0121 332 0.0011 ! 

## 0.0110 R2 0.0124 426 i 

## 0.0014 0.0110 R3 0.0168 

## i 350 0.0012 0.0151 ! 

## Blank 0.0013 400 

## i

----- -----

# BARR~ ___ 1Ii1 HIBBING LABORATORY REPORT

PARTICULATE TESTING FRONT HALF GRAVIMETRIC RESULTS
CLIENT 

## United Taconite LLC. PROJECT 

## No. 23691027.03001 003 TEST 

## T1 TEST DATE 

## 12/10/2009 SOURCE ID 

## Line 2A Waste Gas Stack SV048 SAMPLING LOCATION 

## Stack
AIR FILTERS: 

# 4 INCH GFF ANALYZED ON: 

## 12/11
Run Filter ID Description Gross Daterrime Tare Weight Weight 0.66772 12/15/2009 19:26 

### 0.63662 R1 404225 Black 0.66774 12116/2009 

### 17:17 0.63702
0.65134 12/15/2009 19:21 

### 0.63162 R2 404226 Black 0.65128 12/16/2009 

### 17:1 8 0.63158
0.65988 12/15/2009 19:28 

### 0.63129 R3 404228 Black 0.65946 12/16/2009 

### 17: 19 0.63150

0.63438 12/15/2009 19:25 

### 0.63424 RO 404224 Blank 0.63408 12/16/2009 

### 17:16 0.63461



### PROBE WASH: ACETONE

Run Beaker Description Gross Daterrime Tare ID Weight Weight
100.31636 12115/2009 

### 19:1I 

### 100.30829 R1 78 Grey Residue 100.31614 12116/2009 17:09 

### 100.30859
102.96105 12/15/2009 

### 19:19 102.95585 R2 89 Grey Residue 102.96072 12116/2009 

### 17:10 102.95629
97.37047 12115/2009 

### 19:19 97.36598 R3 121 Grey Residue 97.37011 12116/2009 

### 17:10 97.36618

99.59210 12115/2009 

### 19:17 99.59170 RO 120 Blank 99.59202 12/16/2009 17:08 

### 99.59208



### REMARKS

PAGE 1 OF2 

### SAMPLES COLLECTED 

## By DJK
ANALYSIS PERFORMED 

## By DJK



# ------ DateiTime Uncorrected Net Mass (g) 11/17/200913:31 11/18/2009 

### 10:03 0.03091
11/17/2009 13:38 11/18/2009 

### 10:02 0.01971
11/17/200913:38 11/18/2009 

### 10:01 0.02828

11/17/200913:36 11/18/2009 

### 10:04 -0.00019

Daterrime Solvent Is There Uncorrected Volume Evidence of Net Mass (9) (ml) Sample Loss? 11/18/20099:08 11/18/200915:25 

### 0.00781 130 No
11/18/20099:09 11/18/2009 15:23 

### 0.00481 130 

### No
11/18/20099:10 11/18/2009 15:38 

### 0.00421 105 No

11/18/2009 9:07 11/18/2009 15:26 

### 0.00017 200 No

1/20/2010

# BARR OHMS 

# LANE LABORATORY REPORT

PARTICULATE TESTING BACK HALF GRAVIMETRIC RESULTS
CLIENT 

## United Taconite LLC. PROJECT 

## No. 23691027.03 001 003 TEST T1 TEST DATE 

## 12/10/2009 SOURCE 

## 10 Line 2A Waste Gas Stack SV048 SAMPLING LOCATION 

## Stack
METHYLENE CHLORIDE EXTRACT (ORGANIC)

Run Beaker Description Gross Date/Time Tare 10 

### Weight Weight
0.99535 12129/2009 18:55 

### 0.99455 R1 T31 Light colored 0.99536 12/30/2009 7:33 

### 0.99457 residue Light colored 0.99635 12/29/2009 18:56 

### 0.99548 R2 T32 residue 0.99636 12130/2009 7:34 

### 0.99550
Light colored 0.99214 12129/2009 18:56 

### 0.99119 R3 T33 residue 0.99215 12130120097:34 

### 0.99118

Light colored 0.99074 12129/2009 18:57 

### 0.99035 RO T34 residue 0.99072 12130/2009 7:35 

### 0.99037



### WATER FRACTION (INORGANIC)

Run Beaker Description Gross Date/Time Tare 10 

### Weight Weight
1.30322 12129/2009 19:05 

### 1.29102 R1 T45 White residue 1.30308 12130/2009 7:21 

### 1.29104
1.30385 12/29/2009 

### 19: 12 1.29139 R2 T46 White residue 1.30371 1213012009 7:27 

### 1.29141
1.28703 12129/2009 19:01 

### 1.27003 R3 T47 White residue 1.28668 12130/2009 7:24 

### 1.27003

1.30378 12129/2009 19:00 

### 1.28202 RD T48 White residue 1.28334 12130/2009 7:29 

### 1.28199 1.28334 12130/2009 19:54 

### REMARKS

PAGE 2 OF 2 

### SAMPLES COLLECTED 

## By TAK ANALYSIS PERFORMED 

## By rv1Drv13 12/22

Date/Time Solvent Is There Uncorrected Volume Evidence of Net Mass (g) (ml) Sample Loss? 1217/2009 19:13 1218/2009 20:42 

### 0.00079 335 No
1211/200919:12 1218/2009 20:42 

### 0.00087 290 No
1217/200919:11 1218/2009 20:45 

### 0.00096 300 No

121 112009 

### 19:10 1218/2009 20:46 

### 0.00037 250 No

Date/Time Solvent Is There Uncorrected Volume Evidence of Net Mass (g) (ml) Sample Loss? 12126/2009 15:21 12/27/200914:51 

### 0.01212 420 No
12126/2009 15:21 12127/2009 14:52 

### 0.01238 500 No
12126/2009 15:20 12/27/200914:54 

### 0.01683 445 No

12126/2009 

### 15:19 12127/2009 14:54 

### 0.00134 400 No

1/20/2010 1

# Cliffs Natural Resources Inc. United Taconite, LLC Forbes, Minnesota Barr Engineering Co. January 20, 2010

Results of Gravimetric Paliiculate Analysis Line 2B Waste Gas Stack (SV049)

Filterable Particulate: 

# I Front Half Wash Filter Total Run Weight. 9 Volume. ml Blank Corr. Net Wt., 9 Weight, 9 Weight. 9 RI 0.0040 130 0.0001 0.0039 0.0142 0.0181 R2 0.0034 130 0.0001 0.0032 0.0130 0.0163 R3 0.0049 120 0.0001 0.0048 0.0131 

## 0.0185
Blank 0.0002 200 ----- 

### ----- 

## -0.0002
-----


# Condensible Particulate: Organics: rvlethvlene Chloride Extract Run Weight, 9 Volume. ml Blank Corr. Net WI., g RI 0.0001 

## 335 0.0005 0.0002 R2 0.0008 325 0.0005 0.0004 R3 0.0011 335 0.0005 0.0006
Blank 0.0004 , 250 ----- -----


## Inorganics:
Run Weight, 9

. DI Volume, ml Blank Corr. Net Wt., 9 RI 0.0120 i 

## 382 0.0013 0.0107 R2 0.0081 ! 

## 403 0.0013 i 

## 0.0068 R3 0.0110 395 0.0013 

## i 0.0097 I Blank

, 

## 0.0013 i 

## 400
----- 

### , 

### -----

# HIBBING LABORATORY REPORT 

# BARR PARTICULATE TESTING FRONT HALF GRAVIMETRIC RESULTS
CLIENT 

## United Taconite LLC. PROJECT 

## No. 23691027.03 001 003 TEST 

## T1 TEST DATE 

## 12/8/2009 SOURCE ID 

## Line 2B Waste Gas Stack SV049 SAMPLING LOCATION 

## Stack
AIR FILTERS: 

# 4 INCH 

# GFF ANALYZED ON: 

## 12/11
Run Filter ID Description Gross Daternme Tare Weight Weight 0.64510 12/15/2009 19:23 

### 0.63103 R1 404221 Brownish Tan 0.64538 12/16/2009 

### 17: 13 0.63106
0.64467 12115/2009 19:24 

### 0.63179 R2 404222 Brownish Tan 0.64481 12116/2009 

### 17:14 0.63163
0.64299 12/10/2009 19:25 

### 0.62909 R3 404223 Brownish Tan 0.64276 12116/2009 

### 17: 15 0.62931

0.63438 12115/2009 19:25 

### 0.63424 RO 404224 Blank 0.63408 12/16/2009 

### 17:16 0.63461



### PROBE WASH: ACETONE

Run Beaker ID Description Gross Daterrime Tare Weight Weight
100.62020 12/15/2009 

### 19:14 100.61596 SAMPLES COLLECTED 

# By

Date.Tfime Uncorrected Net Mass (g) 11/17/200913:32 11/18/2009 

### 10:07 0.01420
11 Ii f 

### 12009 13:33 11/18/2009 

### 10:06 0.01303
11/1 f 

### 12009 13:34 11/18/2009 

### 10:05 0.01368

11/17/2009 13:36 11/18/2009 

### 10:04 -0.00019

Date.Tfime Solvent Uncorrected Volume Net Mass (g) (ml) 11/18/2009 9:04 R1 92 Light Grey 100.61972 12116/2009 17:05 100.61586 11118/2009 15:28 

### 0.00405 130
100.28477 12115/2009 

### 19:15 100.28111 11/18/2009 9:05 

### R2 93 Light Grey 100.28427 12116/2009 17:06 

### 100.28121 11/18/2009 15:28 

### 0.00336 130
97.13179 12115/2009 

### 19:16 97.12673 11/18/20099:06 

### R3 41 Light Grey 97.13138 12116/2009 17:07 

### 97.12666 11/18/2009 15:27 

### 0.00489 120

99.59210 12115/2009 

### 19:17 99.59170 11/18/20099:07 

### RO 120 Blank 99.59202 12116/2009 17:08 

### 99.59208 11/18/2009 15:26 

### 0.00017 200



### REMARKS

PAGE 1 OF2 

## DJK DJK

Is There Evidence of Sample Loss?
No

No

No

No

1/20/2010

# OHMS 

# LANE LABORATORY REPORT

PARTICULATE TESTING BACK HALF GRAVIMETRIC RESULTS
CLIENT 

## United Taconite LLC. PROJECT No. 

## 23691027.03001 003 TEST 

## T1 TEST DATE 

## 12/8/2009 SOURCE ID 

## Line 28 Waste Gas Stack SV049 SAMPLING LOCATION 

## Stack
METHYLENE CHLORIDE EXTRACT (ORGANIC)

Run Beaker ID Description Gross DatelTime Tare Weight Weight
Light colored 0.99992 12129/2009 18:53 

### 0.99923 R1 T28 residue 0.99993 12/30/20097:31 

### 0.99926
Light colored 0.99580 12129/2009 18:54 

### 0.99497 R2 T29 residue 0.99583 12/30/20097:31 

### 0.99498
Light colored 0.99755 12/29/2009 18:54 

### 0.99649 R3 T30 residue 0.99758 12130/2009 7:32 

### 0.99653

Light colored 0.99074 12129/2009 18:57 

### 0.99035 RO T34 residue 0.99072 12130/20097:35 

### 0.99037



### WATER FRACTION (INORGANIC)

Run Beaker ID Description Gross DatelTime Tare Weight Weight
1.29786 12129/2009 

### 19:13 1.28583 R1 T42 White residue 1.29771 12/30/2009 7:28 

### 1.28581
1.30351 12129/2009 19:06 

### 1.29532 R2 T43 White residue 1.30341 12/30/2009 7:23 

### 1.29532
1.30796 12/29/2009 

### 19:13 1.29680 R3 T44 White residue 1.30774 12130/2009 7:27 

### 1.29684

1.30378 12129/2009 19:00 

### 1.28202 RO T48 White residue 1.28334 12130/2009 7:29 

### 1.28199 1.28334 12/30/2009 19:54 

### REMARKS

PAGE 2 OF 2 

### SAMPLES COLLECTED 

## By TAK ANALYSIS PERFORMED 

## By MDM3 12/22

DatelTime Solvent Is There Uncorrected Volume Evidence of Net Mass (g) (ml) Sample Loss? 1217/2009 

### 19: 15 12/8/2009 20:40 

### 0.00068 335 No
12/7/2009 

### 19:14 12/8/2009 20:41 

### 0.00084 325 No
1217/200919:13 1218/2009 20:41 

### 0.00106 335 No

121/1200919:10 1218/2009 20:46 

### 0.00037 250 No

DatelTime Solvent Is There Uncorrected Volume Evidence of Net Mass (g) (ml) Sample Loss? 12126/2009 15:22 12127/2009 14:49 

### 0.01197 470 No
12126/2009 15:22 12127/2009 14:50 

### 0.00814 500 No
12126/2009 15:21 12127/200914:51 

### 0.01103 485 No

12126/2009 

### 15: 19 12127/2009 14:54 

### 0.00134 400 No

1/2012010

# Cliffs Natura! Resources Inc. United Taconite, LLC Forbes, Minnesota Barr Engineering Co. January 20, 2010

Results of Gravimetric Particulate Analysis Line 1 Kiln Cooler New (SV116)

Filterable Particulate: 

# I Front Half Wash Filtet· Total Run Weight, g. Volume, ml Blank Corr. Net Wt.. 9 Weight. 9 Weight. 9 Rl 0.0054 75 0.0001 0.0053 -0.0003 0.0050 R2 0.0056 75 0.0001 0.0055 -0.0010 0.0045 R3 0.0059 i 

## 15 0.0001 0.0058 -0.0015 0.0042
Blank 0.0002 200 ----- ----- 

## 0.0000
-----

# BARR HIBBING LABORATORY REPORT

PARTICULATE TESTING FRONT HALF GRAVIMETRIC RESULTS
CLIENT 

## United Taconite LLC. PROJECT No. 

## 23691027.03001 003 TEST 

## TI TEST DATE 

## 12/15/2009 SOURCE 

## 10 Line 1 Kiln Cooler (nev,,1) SV116 SAMPLING LOCATION 

## Stack
AIR FILTERS: 41NCH GFF ANALYZED ON: 

## 12/18

Run Filter 

### 10 Description Gross Datemme Tare Weight Weight 

### 0.63377 12/21/2009 

### 10:44 0.63407 R1 

### 404229 Pink 

### 0.63376 1212212009 9:08 

### 0.63402
0.63211 12/21/2009 

### 10:45 0.63300 R2 

### 404230 Pink 

### 0.63192 12/2212009 9:09 

### 0.63306
0.63200 12121/2009 

### 10:46 0.63353 R3 

### 404231 Pink 

### 0.63151 12/2212009 

### 9: 1 0 0.63307

0.63447 12121/200910:51 

### 0.63434 RO 

### 404239 Blank 

### 0.63413 12122/20099:13 

### 0.63431



### PROBE WASH: ACETONE

Run Beaker ID Description Gross DatelTime Tare Weight Weight


### 97.08356 12/21/2009 

### 10:28 9/.07825 

### R1 

### 123 Grey Residue 

### 97.08378 12122/2009 

### 9:04 97.07832
101.98520 12121/2009 

### 10:29 101.97974 R2 

### 124 Grey Residue 

### 101.98540 1212212009 9:03 

### 101.97972
99.41297 12121/200910:30 

### 99.40696 R3 

### 125 Grey Residue 

### 99.41273 1212212009 9:02 

### 99.40694

102.24486 12121/200910:35 

### 102.24457 RO 

### 90 Blank 

### 102.24481 1212212009 8:59 

### 102.24469



### REMARKS

PAGE 1 OF 1 

### SAMPLES COLLECTED 

## By DJK
ANALYSIS PERFORMED 

## By DJK



# ----- Date/Time Uncorrected Net Mass (g) 11/17/2009 

### 13:39 11/18/2009 10:00 -0.00028
11/17/200913:40 11/18/2009 

### 10:00 -0.00101
11/17/200913:42 11/18/20099:59 

### -0.00154

11/1//200914:02 11/18/2009 9:51 

### -0.00003

Is There

DatelTime Solvent Evidence of Uncorrected Volume Sample Net Mass (g) (ml) Loss? 11/18/20099:11 11/18/2009 15:37 

### 0.00539 75 No
11/18/2009 

### 9: 12 11/18/2009 15:36 

### 0.00557 75 No
11/18/2009 

### 9: 13 11/18/2009 15:36 

### 0.00590 115 No

11/18/20099:18 11/18/200915:43 

### 0.00020 200 No

112012010

### ..... 

# BARR 

# llequest for 

# Laboratol"YAnalytical Services

WI 

### Check One:



# D BlIrr Bngineering COlllplIny 

# D !farr Engiueerillg Compa 

## 470() West 77th Street 

### 739() 

## Ohms Lalll' Min/leapolis, MN 

### 55435-48()3 Edillll, 

### MN 55t/31 

### )-233() Projeel NlIIlIhcr 

# Z 3>

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### Harr HlIgiTll'l'rillg COli/pail.!' 

## 470() Wl'st 77tft ,\-treet Milllleapolis, 

### MN 55435-4803

# N~ 

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(952) 832-26()() (952) 832-26()() 1.1./'(.](,,7. 

### Attention: 

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### (952) 832-26()() Fax 

### (1)52) 832-260/

(Print Nnme) (Direct Phonc No.) 

### Spccial instructions IInd/or spccific rcgulatory rC(luirclllcnts: (method, limit ordetection, etc.) 

# l)\'Ac..

Sample Identilieation



### 2. 

### 3. 

# T: i-) c 

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### by: 1);11

### clTi!lle Date/Time //

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### Method 

### of Shipm

# ~ 

# ,n Olher: 

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### i-\~~(i~t-**-i~;~I)-I;~-l0,;:j--** ()alelTillle

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# __ Dat.e:

# LZ~)J~:(j1. Sample CondiliOIl UpOll 

### Receipl:

### ~eceplahle DOther (explnill)

Dislribution: White-Original Aecompanies Shipment to Lah; Yellow

-- Field COJlY PI'" 01/01

# BARR 

# R.equest for LaboratoryAnalytical**Servic(~s** DiMiD&U

### Jinuma 

# ---- Chcck Onc:



## OBarr E1lgilleering COlllpa1lY

# ~/Bll,.r E1lgi11eering 47(}(} 

## JVest 77th Street

## ~ 739() 

## Ohms LallC Minneapolis, 

## "'IN 55435-4803 Edinll, 

## /lIN 55439-2330 Projcct NUlIlhcr.

# Z !Jarr Ellgi1l{'cri1lg Compally 

## 4700 West 77tfT .')'trcct Minneapolis. /liN 55435-4803 

# N2

(952) 832-2600 (952) 

## 832-260() Attention: 

# thV1

# r<:')L~' L

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### by: late/Time Rcceivcd Ilate/Time 

# 12121

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# g\"" 1(,**~**

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## ~ Collcctors Signaturc: 

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### at Lah by:

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### ~lTeptahlc 

### Uatl'ITill1C

# /2-/D, []()tl1cr 

### (cxplain)**~** 

### Datc: 

### Distrib\ltion: White-Original Accompanics Shipmcnt. t.o Lab; Yellow

- Field Copy (je

IIp\,.OWl\

# sting 'nc,
1301 N. 3,d St. • Superior WI 54880 • 715-392-7114 • 800-373-2562 • F715-392-7163 • www.twinportstesting.com 

## United Taconite PO Box 180 Eveleth, MN 55734



## Attn: Jennifel' Krause 

## Sample Log No: 10C0274 Sample Designation: 

## 2B 

## Test run Coal/Coke, 12/08/10

METHOD UNITS
Moisture Total ASTM 03173 

## wt. % Ash ASTM 03174 

## wt. % Volatile Matter ASTM 03175 

## wt. % Fixed Carbon 

## By Difference ASTM 03175 

## wt. % Sulfur ASTM 04239 

## wt. % Gross Heating Value ASTM 05865 BTUllb

Carbon ASTM D5373 

## wt% Hydrogen ASTM 05373 

## wt. % Nitrogen ASTM 05373 

## wt. % Oxnlen ASTM 03176 

## wt. %

Ch!cri"e AS-rW. ')6721 

## tiij/g Flucrinc: ASTM 03761 

## ug/g MerctilY ASTM 06722 ug/g Sod:;. rn Oxide in Ash ASTM D3682 

## wt.% Hardgrove Grindability Index ASTIvl 0409 

## wt. !index


## Additional:



# Pre""ed 8y:_

# ~1Jv,"a1M~U_[-- __ "

__ _ Date Received: Jan 25, 2010 Date 

## Tested: Jan 25, 2010

MOISTURE & MOISTURE AS

ASH FREE FREE RECEIVED 

## 1.20 4.52 4.47

3.674 3.630 15'126 14441 14268



# Date:_I:.1-M_W-L./_f 1)

__

# in Port

1301 N. 3rd 

### St. • Superior WI 54880 • 715-392-7114 • 800-373-2562 • F715-392-7163 • www.twinportstesting.com 

## United Taconite PO Box 180 Eveleth, MN 55734

Attn: Jennifer 

## Krause Sarnple Log No: 10C0275**Sili'('t);'\~** 

## Q·.ls;gllation: 2A Test run Coal/Coke, 12/10/10

METHOD UNITS


## ASTM 

## 03173 

## 'lit. 

## % ASTrvl03174 

## wt. % Volatile MatteI' 

## A8TM 

## 03175 

## wt. 

## % Fixed Carbon 

## By Difference 

## A8TM 

## 03175 

## wt. 

## % Sulfur 

## A8TM 

## 04239 

## wt. 

## % Gross 

### Heating Value 

## A8TM 

## 05865 

## BTUllb**--~----~---- 1\2-~!**  

## ')5373**w~.** 

## % Hydrcgen 

## ASH! 

## 05373 

## wt% Nitronen 

## A8TM 

## 05373 'lit. 

## % A8Tfv1 

## 03176 '1ft. 

## %

-- ..

# ----------------

# -._._----_..**FI'}i~~illr.** 

## A8TfvI 

## 03761**~duj':** 

### -1'Y 

## AS'rN ')6722**Sc·c;~-_ :~'**  

### Oxide 

## in Ash 

## I\STfI/' 03682**Ha!'(l~jfOVt.)** 

## (;nndability Index !-\8TM 0409 

## wt.lindex


## Additional: Date Received: Jan 25, 2010

MOISTURE &



### ASH FREE



## 14927 Date Tested: Jan 25, 2010

MOISTURE FREE



## 4.57



# 3.613 14245 AS RECEIVED 

## 1.31 4.51



# 3.566 14058

Preoared

# 8Y;~ __ '

_________ _

# ...;;:J,t1i~rnli;i "Inc

.**:{mrw.~",<!-," \'''.,~~:~''.t''** **~** 

### • Superior, WI 54880 ·715-392-7114 • Fox 715-392-7163 www.1winportstesting.com 800-373-2562

Reportto Name:

. Invoi

## 7 e to

### Na~e: : Project#: jProject Name/P.O. 1 

# (UL1) 'I

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### .llA>-ul';!(IL1J, r\f) (LIVI**Fax:-:l-;/~.-f** _ I . 

## .")\"-\ l

r::- TPT# Client 

# I Sample

# I
# of Sample Description: Sample Date ConID # tainers 

# o Rush-Call Lab to receive pricing and to coordinate report date

Remarks 

# I -,,/ ,,,,,1,../. -'7 /1D 

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Received By: (TPn Relinquished By: Received By:

### 1301 N. 3rd 

### St.• Superior WI 54880' 715-392-7114 • 800-373-2562 • F715-392-7163 • www.twinportstesting.com


## Barr Enginnering Company Date Received: 

## 1/25/20.10. 7390 Ohms Lane Date Reported: 

## 1/27/20.10. Edina, MN 55439-2330 Purchase Order 

## # Attn: Tom Kuchinski
TPT Log No: 1 

## DeD335-0338 Client Project Name: United Taconite Client Project Designation: 

## 23/69-10.27.0.3
ASTM E1915-07a Sample Total Sulfur TPT# Description Date Dry 

## (wt. %) 

## iDeO 335 Green Ball Pellets 

## 12/8/0.9 0..0.0.6 10eD 336 Fired Pellets 

## 12/8/0.9 0..0.0.2

. 1O.eO. 337 Green Ball Pellets 

## 12/1010.9 0..0.0.6 iO.eO 338 Fired Pellets 

## 12/10.10.9 < 

## 0.00.1

# 1lm,"·a~~ Prepared 8y:_-.:l

________________ _

# Date:_~{_I_=!2-1!.-.·L1./ 

# ,,",,0

__ _

# BARR 

# Request for LaboratoryAnalytical Services N2 12071
iiAM'WWR4W 

### Check One:



# D Barr Engineering Company / 4700 West 77th Street Minneapolis, MN 55435-4803 (952) 832-2600 Attention: 

# J:b ""I 

# V:: U

# cJ-~'\5 

# k ,(e (Print Name) 

## n=::r-'Barr Engineering Compa 

# t::::5J 7390 Ohms Lane Edina, MN 55439-2330 (952) 832-2600



# t-**qs-~-~1:J-')..i:d.i-** (Direct Phone No.) 

### Special instructions and/or specific regulatory requirements: (method. limit ofdetection. ctc.) 

### C i 

### I Jl 

# 11. L.Mot I \. 

### I'-e S (j 

### r':) 

# to ' ¥--0.::,

# ~ 

# 1tlN\.\'" S

# ~ ,:)

Sample Identification

Collected by (Print Name): Relinquished by: 

# -:)wv Relinquished by:

Collectors Signature: 

# t**K.JI.-~~,\s**

# k...:

DatelTime Collected Media 

### J.D. # 

# UJ7J3S

Date/Time 

# o FcdEx 

# 0 UPS 

### Other:

Date:
Distribution: White-Original Accompanies Shipment to Lab: Yellow

- field Copy Project Number 

# .d-,l
Barr Engineering Company 4700 West 77th Street Minneapolis, MN 55435-4803 Ph. (952) 

## 8321f600 Fax (952)rl32-2601 

## IICft£o 

# v V\,.t<., 

# I""'**C!.:!£LqiJ(,~,**

# _____ _ (Print**N~nc)**



### Remarks

Received by: Daterrime Received by: Date/Time Received at Lab by: DatciTime Sample Condition upon Receipt: 

# o Acceptable 

## 0 Other (explain)**R~·\.** 03 II!

# REPORT

OF


# ANALYSIS

TO: BarrEngineering Company 7390 Ohms Lane Edina, MN 55439-2330

ATTN: Tom Kuchinski PHONE: (952) 832-2727 E-Mail: tkuchinski@barr.com
INVOICE

LBI Lab # 

# DESCRIPTION 6090 Green Ball Pellet 12/8/9 6091 Fired Pellet 12/8/9 6092 Green Ball Pellet 12110/9 

# 6093 Fired Pellet 12110/9 

# LAB #

S .0040
.0038
.0042
.0039 

# LERCH BROTHERS, INC. 1600 5th

# Ave. W. P.O. Box 

# 8 Hibbing, MN 55746
Phone: (218) 262-3456 Fax: (218) 262-5808

DATE: January 27, 2010

PURCHASE ORDER 23/69-1027

### January 20,2010
BARR ENGINEERING CO 3128 14th AVENUE E HIBBING MN 55746
ATTN: TOM LEIER 

## Analysis Report

Client Sample ID: Coal Composite 

### 12/10109 Sample ID By: Date Sampled: Dec 10, 2009 Sample Taken At: Date Received: Dec 14, 2009 Sample Taken By: Product Description: COAL P.O.#: SGS Minerals Sample 10: 

### 491-0941610-002 Tests Method As Received Moisture, Total % ASTM D3302 1.30 Ash % ASTM D3174 4.66 Sulfur % ASTM 04239 Method B 3.28 Gross Calorific Value BTU/LB ASTM D5865 14037 Carbon % ASTM D5373 79.00 Hydrogen % ASTM D5373 4.37 Nitrogen % ASTM D5373 1.65 Oxygen % ASTM 05373 (by diff) 5.74

Minerals Services Division 

### Barr Engineering Line 2A UTAC 

### 2009111/12 TYL



## Q.r£
4.72 3.32 14222 80.04

4.43 1.67 5.82

Vanessa Chambliss

Branch Manager Page 1 of 1

OAF

14927

SGS North America Inc. 16130 Van Drunen Road South Holland t (708) 331-2900 f (708) 333-3060 www.sgs.comfminerals

Member ofthe SGS Group (Societe Generale de Surveillance)
This document is issued by the Company under its General Conditions of Service accessible at http://\vww.sgs,comAerms_and_conditions.hfm. Attention is drawn to the limitation of liability, indemnification andjun'sdiction issues defined therein. Any holder of this document is advised that information contained hereon reflects the Company's findings at the time of its intervention only and within the limits of Client's instructions, if any. The Company's sole responsibility is to its Client and this document does not exonerate parties to a transaction from exercising all their rights and Obligations under the transar;fion documents. Any unauthorized alteration, forgery or falsification ofthe content orappearance ofthis documentis unlawful and offenders maybe prosecutedto the fullest extent ofthe law

### January 20,2010
BARR ENGINEERING CO 3128 14th AVENUE E HIBBING MN 55746
ATTN: TOM LEIER 

## Analysis Report

Client Sample ID: Date Sampled: Coal Composite 12/08/09 Dec 8,2009 Sample ID By: Sample Taken At: Date Received: Dec 14, 2009 Sample Taken By: Product Description: COAL P.O.#: SGS Minerals Sample 10: 

### 491-0941610-001 Tests Method As Received Moisture, Total % ASTM D3302 1.21 Ash % ASTM D3174 4.71 Sulfur % ASTM D4239 Method B 3.29 Gross Calorific Value BTU/LB ASTM D5865 14159 Carbon % ASTM D5373 78.71 Hydrogen % ASTM D5373 4.46 Nitrogen % ASTM D5373 1.32 Oxygen % ASTM D5373 (by diff) 6.30

Minerals Services Division 

### Barr Engineering Line 2B UTAC 2009/11/12 TYL



### 4.77 3.33 14333 79.67

4.52 1.34 6.37

Vanessa Chambliss

Branch Manager Page 1 of 1

15051

SGS North America Inc. 16130 Van Drunen Road South Holland t (708) 331-2900 f (708) 333-3060 www.sgs.com/minerals
Member ofthe SGS Group (Societe Generale de Surveillance)
This document is issued by the Company under its General Conditions of Service accessible at http:lAvww.sgs.comAerms_and_conditions.htm. Attention is drawn to the limitation of liability, indemnification andjuriSdiction issues defined therein. Any holder of this document is advised that information contained hereon reflects the Company's findings at the time of its intervention only and within the limits of Client's instructions, if any. The Company's sole responsibility is to its Cfient and this document does not exonerate parties to a transaction from exercising all their rights and obfigations under the transaction doc:uments. Any unauthoriZed alteration, forgery or falsification ofthe content orappearance ofthis documentis unlawfuland offenders maybe prosecutedto the fullest extent ofthe law

## Analysis Report

January 14.2010

BARR ENGINEERING CO 3128 14th AVENUE 

### E**HIB81i~G** 

### MN 

### 55746
ATTN TOM LEIER

Client Sam::lie 10: Date Sampled: Date Received: Product Description: Greenball Composite 

### 12/08/09 Dec 8.2009 Dec 14. 2009 Mise Solid Sample 

### ID By: Sample Taken At: Sample Taken 8y: Sample Type: P.O.#: 

### SGS Minerals Sample ID: 491-0941611-001

Moisture, Total 

### % Sulfur 

### % Method ASTM D3302 ASTfvl 04239 Method B

Minerals Services Division 

### As Received 

### 9.56 0.02 Barr Engineering Line 2A UTAC Aggregate 

### 2009/11/12 TYL

0.02

Vanessa Chambliss

Branch Manager Page 1 of 1

SGS North America Inc. 16130 Van Drunen Road South Holland t (708) 331-2900 f (708) 333-3060 INVlw.sgs.comiminerals
Member of the SGS Group (Societe Generale de Survef!1ance)
Tnls oo:::ument IS Issued by the Company under irs Genera! Conditions 0,; Service ac:::essibfe at**17trp://,,,~,·,~,·**•.sgs.cDmllenns_and_condj{jons.htm. Atlention is drawn to the limitation of liability,**;ndemnii7:;ati~n** andfun"sdiction issues defined therEI:" Any hofder of this do:ument is**ad~'issd** thai information cC'1lamad hereon renects the Company's findings at the time of its imervention only and within the limits of ClIent's instr'.1r:.tJons. if any. The**Compan.~'·s** sale responsibility is to its Client and this dOcument does net exonerate parries te a Iransa::tio!7 from sxercisin2 all their rights and obligations under the (ransaetbl do:::uments. Any unauthorized alteration. forgsryor fafs@:::ation ofIhe content orappaarance ofthis document is unlawfuland cffendars maybe prosecuted to the fullest axtent ofIhe law

## Analysis Report

January 14,2010

BARR ENGINEERING CO 

### 3128 14th .AVENUE E 

### HIBBING MN 55746
ATIN: Torvi LEIER



### Clien: Sample 10: Date Sampled: Date Received: Product Description: Fired Pellet Composite 

### 12/08/09 Dec 8,2009 Dec 14, 2009 Misc Solid Sample 10 By Sample Taken 

## .A': Sample Taken By: Sample Type: P. 

### O."F-: SGS Minerals Sample 10: 

### 491-0941611-002

Moisture, Tota! 

## % Sulfur 

### % Method 

### ASTM 03302 ASTM 04239 Method B

Minerals Services Division 

### As Received 

### 0.90 <0.01 

### Barr Engineering Line 2A UTAC Aggregate 20091:1/12 

### TYL

<0.01 

### Page 1 of i

(...O--J**/.~** .. _/ /. /**~**.•**,~** __-) '. ,/.6'". ",-,,_,

__


### Vanessa Chambliss

Branch Manager

SGS North America Inc, 16130 Van Drunen Road South Holland t (708) 331-2900 f (708) 333-3060 '1,'ww.sgs.com/minerals ty1ember of the SGS Group (So::!ete Generale ce SurvEillance)
This document is issued by the Company under its General Conditions of Servi:.e accessiDle at nitp.-P''I'''N:.sgS.:::O!T'.:'rerTTls_and_conditions.htm. Attention is drawn to Ihe I:mlfation of ilafli!ity, indemnirication andjurisdiction issues darined therein. Any ho!der of !nis document is advised that infonnalion cantsined hef'ecn rsne:;ts the Company's findings at tne time ol i:s intarver.!io,"l only and within the limits of Ciisnt's jnslr,;cticns. if any The Company's so!e responsibility is to its Client and this documen: aoes no: exonerate panies to a ,ransactbn frem exercising al/ their rights and obligations under the transaction dccumems Any unauthonzedalteration, forgery or i'a/si/i:;ation otthe content**o,~appearanr::e** of this document is unfawfufand offenders may be prosecuted 10 Ihe fullest extenl ofthe law

## Analysis Report

January 14,2010
BARR ENGINEERING CO**3~28** 

### 14th AVENUE E HIBBING MN 55746
ATTN: TOM LEIER

Client Sample ID: Date Sampled: Date Received: Product Description: Greenbal! Composite 12/10/09 Dec 10. 2009 Dec 14, 2009 r\fJisc Solid Sample ID By: Sample Taken At: Sample Taken By: PO.I;. Sample Type: SGS Minerals Sample 10: 

### 491-0941611-003
Moisture, Total 

## % Sulfur 

### % Method ASTfvi 03302 ASTfvi D4239 fviethod B

Minerals Services Division 

### As Received 9.63 <0.01 Barr Engineering Line 2B UTAC 2009,'11/12 TYL Aggregate

<0.01

Vanessa Chambliss

Branch Manager Page '1 

### of 1

SGS North America Inc. 16130 Van Drunen Road South Holland t (708) 331-2900 f (708) 333-3060 www.sgs.com/minerals

r

..1ember of the SGS Group {So:ie:e GE;>lerale de Sut'.'eil:ancel
This d::;cumem is issued by Ine (0mpany under Its General Conditions of Service ac:::essible at hrtp:l!.v',v·

.....sgs,com/i8rrns_and_condfrions.hlm. Attention is drat..-n to the limitation of fiabiilty, inc&m.'lir;cation andju,isdiclion iSSUeS**deil!~ed** therein Any holder of this do:;ument is advls?;] Iha! mformatJon contained hereon rellscts the Companys findings a; Ihe time of its intenrention only and within [he limits of elien!":; insrructions, if any. The Compan/s sole responsibility is to Ii,; Chen! anj this dOCument does not exonerate parties /0 a transa:;t:::m from cxer:ising all**thel~~** nghts and obligations under rne transac!icn ao:;umeniS. Any unauthorized afteration, iorgerlor ialsffi:;"tlon of the content orapp=arance 0,1 this document is un!a

..vfui and offenders mal be prosecuted /0 the iu!lest extent ofthe law

## Analysis Report

January 14,2010
BARR ENGINEERING CO 3128 14th AVENUE E HIBBING MN 55746
ATTN: TOM LEIER

Client Sample 10: Date Sampled: Date Received: Product Description: Fired Pellet Composite 12/10/09 Dec 10. 2009 Dec 

### 14. 2009 Misc Solid Sample 10 By: SamDle Taken At: Sample Taken By: Sampis Type: 

### P 0.#
SGS 

### Minerals Sample ID: 491-0941611-004



### Moisture, Total 

### % Sulfur % Method ASTM 03302 ASTM 04239 Method B

Minerals Services Division 

### As Received 0.61 <0.01 Barr Engineering Line 2B UTAC Aggregate 2009/11/12 TYL

<0.01

Vanessa Chambliss

Branch Manager Page I 

### of 1

SGS North America Inc. 16130 Van Drunen Road South Holland t (708) 331-2900 f (708) 333-3060 \WIW.sgs.comiminerals
Membe: of Ine SGS Group (Socie:e Genera!e oe Surveillance)

Tnls OCCUlTiSm is issued by the Company under i;s Genera! Gondftbns of Service a:::cesslbie a! http://'Nl,·

....·/.sgs,com/i£frms_and_condilions,htm.Attentionisarawntothelimi,a!ior; of liability, Indemnification andjurisddion issues deiinad therein Any hofder of this d::x;:ument is advised tnat informa;;on comaineci nap-on f2fiec.ts the Company::; fin::,i1!1gs at the time of its inlarver;ti:::m only and within the limits of Cliant's instnJctio.'1S, if any, The Campan}"s sols raspens/bilit)' is to its Ciien: and this d:n;umen! does not exonerate parties te a transaction from exerCising all thefr righrs and aMgatiorls under the lransa::lbn**a'~Cum=nrs** Any unauthon'zed alteration, forgery or fa!sifica!fon ofthe conlen! or appearam::e of this document is unla

....ful and offenders may be prosecuted to the fullest extent ofthe law

# E G E D Inc. www.legend-group.com

January 26, 2010

Mr. Tom Kuchinski Barr Engineering Co. 4700 W 77th St Minneapolis, MN 55435

Work Order Number: 1000314 RE: 23691027 88 Empire Drive 

### St Paul, MN 55103 Tel: 651-642-1150 Fax: 651-642-1239



### Enclosed are the results of analyses for samples received by the laboratory on 

### 01/25/10. Ifyou have any questions concerning this report, please feel free to contact me. All samples will be retained by LEGEND, unless consumed in the analysis, for 30 days from the date ofthis report and then discarded unless other arrangements are made.

Prepared by, LEGEND TECHNICAL SERVICES, INC

Terri Olson Client Manager II tolson@legend-group.com

Legend Technical Services, Inc. 

### Erin Sloan Report Reviewer esloan@legend-group.com

The results in this report apply to the samples analyzedin accordance with the chain 

### ofcustody document. This analytical report must be reproduced in its entirety.

# E G IE N 88 Empire Drive 

# Technical Services, Inc, St Paul, MN 55103 Tel: 651-642-1150 Fax: 651-642-1239 www.legend group.com

Barr Engineering Co. 4700 W 77th St Minneapolis, MN 55435

Sample 

### 10
Green Ball Pellet Fired Pellet Green Ball Pellet Fired Pellet



### Shipping Container Information Project: 23691027 Project Number: 23691027003004 Project Manager: Mr. Tom Kuchinski 

### ANALYTICAL REPORT FOR SAMPLES Laboratory 

### 10

1000314-01 1000314-02 1000314-03 1000314-04 Matrix
Other Other Other Other Work Order#: 1000314 Date Reported: 

### 01/26/10

Date Sampled


### 12/08/09 00:00 12/08/09 00:00 12/10109 00:00 12/10109 00:00 Date Received


### 01/25/10 09:58 01/25/10 09:58 01/25/10 09:58 01/25/10 09:58



### Default Cooler Temperature (DC): Received on ice: No Received on melt water: No Custody seals: No



### Case Narrative:

Legend Technical Services, Inc. 

### Temperature blank was not present Ambient: Yes Received on ice pack: No Acceptable (IH/ISO only): No

The results in this report apply to the samples analyzedin accordance with the chain 

### ofcustody document. This analytical report must be reproduced in its entirety. 

### Page 2 of 6

# L 

# IE 

# G D Technical Services, Inc. www.legend-group.com

Barr Engineering Co. 4700 W 77th St Minneapolis, MN 55435 Project: 23691027 Project Number: 23691027003004 Project Manager: Mr. Tom Kuchinski 

### LECO 

## Legend Technical Services, Inc. 88 Empire Drive St Paul, MN 55103 Tel: 651-642-1150 Fax: 651-642-1239

Work Order#: 1000314 Date Reported: 01/26/10



### Analyte Result RL MOL Units Dilution Batch Prepared Analyzed Method Notes Green Ball Pellet (1000314-01) Other Sampled: 12/08/0900:00 

### Received: 01/25/10 9:58 Sulfur 0.0057 0.00097 % BOA2611 01/26/10 01/26/10 ASTM E-1915-07a 

### Fired Pellet (1000314-02) Other Sampled: 12108/09 00:00 

### Received: 01/25/10 

### 9:58 Sulfur 0.0026 0.00096 % BOA2611 01/26/10 01/26/10 ASTM E-1915-07a 

### Green 8all Pellet (1000314-03) Other Sampled: 12/10/0900:00 

### Received: 01/25/10 9:58 Sulfur 0.0043 0.00099 % BOA2611 01/26/10 01/26/10 ASTM E-1915-07a 

### Fired Pellet (1000314-04) Other Sampled: 12/10/0900:00 

### Received: 01/25/10 

### 9:58 Sulfur 0.0088 0.00097



### Legend Technical Services, Inc. % BOA2611 01/26/10 01/26/10 ASTM E-1915-07a

The results in this report apply to the samples analyzedin accordance with the chain 

### ofcustody document. This analytical report must be reproduced in its entirety. 

### Page 3 of 6

# L 

# E G 

# E N D 88 Empire Drive 

# Technical Services, Inc. St Paul, MN 

### 55103 Tel: 

### 651-642-1150 Fax: 651-642-1239 www.legend-group.com

Barr Engineering Co. 

### 4700 W 77th St Minneapolis, MN 

### 55435

Analyte Result 

### Batch BOA2611

- LECO ASTM E-1915-07a Blank (BOA2611-BLK1) Sulfur < 0.0010 

### LCS (BOA2611-BS1) Sulfur 3.57 

### LCS Dup (BOA2611-BSD1) Sulfur 3.54



### Legend Technical Services, Inc. Project: 

### 23691027 Project Number: 

### 23691027003004 Project Manager: Mr. Tom Kuchinski 

## LECO

- Quality Control Legend Technical Services, Inc.

RL MOL Units Spike Level Source Result %REC %REC Limits

Prepared 

### &Analyzed: 01/26/10 0.0010 % 

### Prepared 

### &Analyzed: 01/26/10 0.0046 % 3.56 100 80-120 

### Prepared 

### &Analyzed: 01/26/10 0.0050 % 3.56 99.5 80-120 

### Work Order#: 

### 1000314 Date Reported: 01/26/10

%RPD

0.787 

### %RPD Limit

20 

### Notes

The results in this report apply to the samples analyzedin accordance with the chain 

### ofcustody document. This analytical report mustbe reproduced in its entirety. 

### Page 4 of 6

# L 

# E G 

# E Technical Services, Inc, www.legend-group.com

Project: 23691027 Barr Engineering Co. 4700 W 77th St Minneapolis, MN 55435 Project Number: 23691027003004 Project Manager: Mr. Tom Kuchinski 

### Notes and Definitions

< 

### Less than value listed dry Sample results reported on a dry weight basis NA Not applicable. The %RPD is not calculated from values less than the reporting limit. MOL Method Detection Limit RL Reporting Limit RPD Relative Percent Difference LCS Laboratory Control Spike 

### = Blank Spike (BS) 

### = Laboratory Fortified Blank (LFB) MS Matrix Spike 

# =Laboratory Fortified Matrix (LFM) 88 Empire Drive St Paul, MN 55103 Tel: 651-642-1150 Fax: 651-642-1239

Work Order#: 1000314 Date Reported: 01/26/10



### Legend Technical Services, Inc. The results in this report apply to the samples analyzedin accordance with the chain ofcustody document. This analytical report must be reproduced in its entirety. 

### Page 5 of 6'1J III (C CD a>

### Sa> r CD (C CD ::J 0. -i CD (') ::r ::J 0' 

### !!!. UJ CD 

# :s, (') CD !!' 

### 3' p

S' SO 

### ;I ;::;.:<'Dcn '" 0

.... CD 

### :or ctl

## 5:~'**~** CtloC;; 

### q- -,.,-. , 0 '"

<:- 

### "':or 0(;;'

### ~til 0."0 00 0;::;' <: III

### ~:g**"'~** 

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## West 77th Street 7390 Ohms 

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## West 7711/ Street Minnellpoli!J, MN**55435"~80]** 

## Edina, MN 55439-'1330 

## Minneapolis, MN 55435-4803 

## (952) 832·2609 (952) 

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# Appendix D
Instrument OutputCleveland Cliffs Natural Resources, Inc United Taconite, LLC Forbes, Minnesota Average Analyzer Results Run 

## I 02, %

1 18.1 2 18.1 3 

### ! 18.1
CR1000 02_Avg TS Percent Avg 

### 12/10/2009 8:02 0.0 

### 12/10/2009 8:03 0.0 

### 12/10/2009 8:03 0.0 

### 12/10/2009 8:03 0.0 

### 12/10/2009 8:04 

### 0.0 12/10/2009 8:04 0.0 

### 12/10/2009 8:04 0.0 

### 12/10/2009 8:05 14.6 

### 12/10/2009 8:05 20.0 

### 12/10/2009 8:05 

### 20.0 12/10/2009 8:06 20.5 

### 12/10/2009 8:06 11.2 

### 12/10/2009 8:06 9.0 

### 12/10/2009 8:07 

### 9.0 12/10/2009 8:07 15.5 

### 12/10/2009 8:07 0.5 

### 12/10/2009 8:08 10.8 

### 12/10/2009 8:08 19.4 

### 12/10/2009 8:08 3.6 

### 12/10/2009 8:09 0.1 

### 12/10/2009 8:09 0.1 

### 12/10/2009 8:09 0.1 

### 12/10/20098:10 0.1 

### 12/10/20098:10 0.1 

### 12/10/2009 8:10 13.1 

### 12/10/2009 8:11 0.3 

### 12/10/20098:11 0.0 

### 12/10/20098:11 0.0 

### 12/10/20098:12 1.7 

### 12/10/20098:12 13.5 

### 12/10/20098:12 0.1 

### 12/10/20098:13 0.0 

### 12/10/20098:13 0.0 

### 12/10/20098:13 0.0 

### 12/10/20098:14 0.0 

### 12/10/20098:14 0.0 

### 12/10/20098:14 0.0 

### 12/10/20098:15 18.3 

### 12/10/20098:15 21.0 

### 12/10/20098:15 21.0 

### 12/10/20098:16 21.0 

### 12/10/20098:16 19.3 

### 12/10/20098:16 13.2 

### 12/10/20098:17 4.9 

### 12/10/20098:17 0.5 

### 12/10/20098:17 12.2 

### 12/10/2009 8:18 20.8 

### 12/10/20098:18 20.9 

### 12/10/20098:18 20.9 

### 12/10/20098:19 20.9 

### 12/10/2009 8:19 20.9 

### 12/10/20098:19 20.9 

### 12/10/2009 8:20 13.2 

### 12/10/2009 8:20 0.4 

### 12/10/2009 8:20 0.2 

### 12/10/2009 8:21 0.1 

### 12/10/2009 8:21 0.1 

### 12/10/2009 8:21 0.1 

### 12/10/2009 8:22 0.1 

### 12/10/2009 8:22 0.1 

### 12/10/2009 8:22 0.1 

### 12/10/2009 8:23 0.1 

### 12/10/2009 8:23 0.1 

### 12/10/2009 8:23 0.6 

### 12/10/2009 8:24 9.4 

## I I 

## I I Reference Method Data Data Logger Output
Line 2A WGS (SV048) C02,% 

## I S02, ppm

2.0 

### i 211.6 2.0 

## ! 212.7 2.0 

### i 212.1

1362 CR1000.Std.08 C02_Avg S02_Avg Percent PPM

Avg Avg -0.1 0.1 -0.1 0.1 -0.1 0.1 0.0 0.1 

### 0.0 0.6 0.0 0.6 0.0 0.7 0.6 0.6 4.0 0.1 

### 4.0 -0.1 1.6 -0.1 7.7 0.0 9.0 0.0 

### 9.0 0.0 3.4 1.3 0.0 82.6 0.1 122.8 0.1 44.2 0.0 185.0 0.0 420.0 0.0 466.9 0.0 477.1 0.0 

### 477.8 0.0 477.7 0.1 332.0 0.0 217.6 0.0 257.0 0.0 

### 263.6 0.0 263.3 0.1 124.5 0.0 56.4 0.0 79.5 0.0 91.8 0.0 94.0 0.0 94.4 0.0 

### 95.0 0.0 95.2 0.1 54.3 0.1 7.3 0.1 1.1 0.1 0.3 0.1 1.9 0.1 15.7 0.1 78.4 0.0 62.7 0.1 17.9 0.1 6.1 0.1 3.4 0.1 2.1 0.1 1.3 0.1 0.9 0.1 0.6 0.1 0.6 0.0 1.2 0.0 1.5 0.0 1.7 0.0 1.4 0.0 1.2 0.0 1.0 0.0 1.0 0.0 1.0 0.0 0.9 0.0 0.9 0.0 1.0 0.1 0.7
Page 1 of 15 Comment Codes In Stack Bias Drift Check Standby In Stack

Notes

02, Co2, S02 Zero

20.002, 4.0 Co2

9.0 02, 9.0 CO2

479 S02

261.9 S02

96.3 S02 Barr Engineering Sampled on 

### 12/10109

Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration Analyzer Calibration

System bias Calibration System bias Calibration System bias Calibration System bias Calibration System bias Calibration System bias Calibration System bias Calibration System bias Calibration System bias Calibration System bias Calibration System bias CalibrationCleveland Cliffs Natural Resources, Inc Reference Method Data Barr Engineering United Taconite, LLC Data Logger Output Sampled on 12/10/09 Forbes, Minnesota Line 2A WGS (SV048) TIMESTAMP 02_Avg C02_Avg S02_Avg TS Percent Percent PPM 12/10/2009 8:24 8.3 1.6 0.5 System bias Calibration 12/10/2009 8:24 19.8 3.9 0.4 System bias Calibration 12/10/2009 8:25 19.9 3.9 0.3 System bias Calibration 12/10/2009 8:25 19.9 4.0 0.3 System bias Calibration 12/10/2009 8:25 20.0 4.0 0.2 System bias Calibration 12/10/2009 8:26 20.0 4.0 0.1 System bias Calibration 12/10/2009 8:26 20.0 4.0 0.1 System bias Calibration 12/10/2009 8:26 20.0 4.0 0.1 System bias Calibration 12/10/2009 8:27 20.0 4.0 0.1 System bias Calibration 12/10/2009 8:27 20.3 2.8 0.1 System bias Calibration 12/10/2009 8:27 20.2 3.2 0.1 System bias Calibration 12/10/2009 8:28 12.6 2.6 11.7 System bias Calibration 12/10/2009 8:28 0.3 0.2 138.7 System bias Calibration 12/10/2009 8:28 0.2 0.1 220.8 System bias Calibration 12/10/2009 8:29 0.1 0.1 244.3 System bias Calibration 12/10/2009 8:29 0.1 0.1 250.9 System bias Calibration 12/10/2009 8:29 0.1 0.1 253.5 System bias Calibration 12/10/2009 8:30 0.1 0.1 255.6 System bias Calibration 12/10/2009 8:30 0.1 0.1 256.6 System bias Calibration 12/10/2009 8:30 0.1 0.1 257.1 System bias Calibration 12/10/2009 8:31 0.1 0.1 257.1 System bias Calibration 12/10/2009 8:31 0.1 0.1 258.5 System bias Calibration 12/10/2009 8:31 0.1 0.1 259.2 System bias Calibration 12/10/2009 8:32 0.1 0.1 259.7 System bias Calibration 12/10/2009 8:32 0.1 0.1 259.6 System bias Calibration 12/10/2009 8:32 16.0 0.1 191.2 System bias Calibration 12/10/2009 8:33 20.8 0.1 57.4 System bias Calibration 12/10/2009 8:33 20.9 0.1 20.5 12/10/2009 8:33 20.9 0.1 11.0 12/10/2009 8:34 20.9 0.1 6.8 12/10/2009 8:34 20.9 0.1 5.0 12/10/2009 8:34 20.9 0.1 4.1 12/10/2009 8:35 20.9 0.1 3.3 12/10/2009 8:35 20.9 0.1 2.9 12/10/2009 8:35 20.9 0.1 2.5 12/10/2009 8:36 20.9 0.1 2.2 12/10/2009 8:36 20.9 0.1 2.1 12/10/2009 8:36 20.9 0.1 1.9 12/10/2009 8:37 20.9 0.1 1.6 12/10/2009 8:37 20.6 0.3 2.3 12/10/2009 8:37 18.4 1.8 82.5 12/10/2009 8:38 18.3 1.8 156.1 12/10/2009 8:38 18.3 1.9 171.3 12/10/2009 8:38 18.3 1.9 175.7 12/10/2009 8:39 18.3 1.8 176.9 12/10/2009 8:39 18.3 1.9 177.7 12/10/2009 8:39 18.3 1.9 179.4 12/10/2009 8:40 18.3 1.8 179.8 12/10/2009 8:40 18.3 1.9 179.0 12/10/2009 8:40 18.3 1.9 177.9 12/10/20098:41 18.4 1.9 177.1 12/10/2009 8:41 18.3 1.9 175.9 12/10/2009 8:41 18.3 1.9 175.8 12/10/2009 8:42 18.4 1.8 175.7 12/10/2009 8:42 18.4 1.9 174.5 12/10/2009 8:42 18.4 1.8 175.0 12/10/2009 8:43 18.4 1.8 175.1 12/10/2009 8:43 18.4 1.9 175.0 12/10/2009 8:43 18.4 1.9 176.6 12/10/2009 8:44 18.4 1.8 177.6 12/10/2009 8:44 18.4 1.8 176.1 12/10/2009 8:44 18.4 1.8 174.4 12/10/2009 8:45 18.4 1.8 173.9 12/10/2009 8:45 18.4 1.8 174.2 12/10/2009 8:45 18.4 1.8 175.0 12/10/2009 8:46 18.3 1.9 175.7 12/10/2009 8:46 18.4 1.9 175.9 12/10/2009 8:46 18.3 1.9 176.2 12/10/20098:47 18.3 1.9 176.2 12/10/20098:47 18.3 1.9 175.0 12/10/2009 8:47 18.3 1.9 174.2 12/10/2009 8:48 18.3 1.8 174.1 12/10/2009 8:48 18.3 1.9 174.3
Page 2 of 15Cleveland Cliffs Natural Resources. Inc Reference Method Data Barr Engineering United Taconite. LLC Data Logger Output Sampled on 12110109 Forbes. Minnesota Line 2A WGS (SV048) TIMESTAMP 02_Avg C02_Avg S02_Avg TS Percent Percent PPM 1211012009 8:48 18.3 1.9 175.1 1211012009 8:49 18.3 1.9 175.3 1211012009 8:49 18.3 1.9 175.0 1211012009 8:49 18.2 1.9 175.5 1211012009 8:50 18.3 1.9 175.9 1211012009 8:50 18.3 1.9 175.5 1211012009 8:50 18.2 1.9 175.5 12110120098:51 18.3 1.9 177.7 1211012009 8:51 18.3 1.9 179.1 1211012009 8:51 18.3 1.9 179.3 1211012009 8:52 18.3 1.9 180.1 1211012009 8:52 18.3 1.9 180.1 1211012009 8:52 18.2 1.9 180.3 1211012009 8:53 18.3 1.9 182.2 1211012009 8:53 18.3 1.9 182.5 1211012009 8:53 18.3 1.9 181.9 1211012009 8:54 18.3 1.9 181.3 1211012009 8:54 18.3 1.9 180.5 1211012009 8:54 18.3 1.9 180.0 1211012009 8:55 18.3 1.9 180.6 1211012009 8:55 18.3 1.9 182.2 1211012009 8:55 18.3 1.9 184.1 1211012009 8:56 18.3 1:9 185.5 1211012009 8:56 18.3 1.9 185.9 1211012009 8:56 18.3 1.9 186.2 1211012009 8:57 18.3 1.9 186.6 1211012009 8:57 18.3 1.9 185.5 1211012009 8:57 18.3 1.9 183.6 1211012009 8:58 18.3 1.9 183.2 1211012009 8:58 18.3 1.9 184.3 1211012009 8:58 18.3 1.9 185.9 1211012009 8:59 18.3 1.9 186.8 1211012009 8:59 18.3 1.9 187.0 1211012009 8:59 18.3 1.9 188.1 1211012009 9:00 18.3 1.9 189.1 1211012009 9:00 18.3 1.9 188.3 1211012009 9:00 18.3 1.9 187.1 1211012009 9:01 18.3 1.9 185.8 1211012009 9:01 18.3 1.9 185.9 1211012009 9:01 18.3 1.9 185.8 1211012009 9:02 18.3 1.9 184.4 1211012009 9:02 18.3 1.9 182.6 1211012009 9:02 18.3 1.9 182.1 1211012009 9:03 18.3 1.9 182.1 1211012009 9:03 18.3 1.9 181.9 1211012009 9:03 18.3 1.9 182.3 1211012009 9:04 18.3 1.9 182.0 1211012009 9:04 18.3 1.9 180.9 1211012009 9:04 18.3 1.9 179.9 1211012009 9:05 18.3 1.9 179.9 1211012009 9:05 18.3 1.9 180.5 1211012009 9:05 18.4 1.9 180.1 1211012009 9:06 20.6 0.4 116.0 1211012009 9:06 20.9 0.2 32.7 121101200910:39 20.9 0.1 0.2 1211012009 10:40 8.9 0.1 38.5 System Bias Check 1211012009 10:40 0.5 0.1 175.7 System Bias Check 1211012009 10:40 0.1 0.1 234.5 System Bias Check 121101200910:41 0.1 0.1 250.2 System Bias Check 121101200910:41 0.1 0.1 255.0 System Bias Check 1211012009 10:41 0.1 0.1 257.1 System Bias Check 1211012009 10:42 0.1 0.1 257.9 System Bias Check 1211012009 10:42 0.1 0.1 259.1 System Bias Check 1211012009 10:42 0.1 0.1 

### 260.6 S02261.9 System Bias Check 121101200910:43 0.1 0.1 260.8 System Bias Check 1211012009 10:43 0.7 0.1 259.8 System Bias Check 1211012009 10:43 8.7 0.1 189.8 System Bias Check 1211012009 10:44 5.7 1.1 211.9 System Bias Check 1211012009 10:44 19.6 3.8 89.9 System Bias Check 121101200910:44 19.9 3.9 23.0 System Bias Check 1211012009 10:45 19.9 3.9 10.4 System Bias Check 1211012009 10:45 19.9 3.9 6.5 System Bias Check 1211012009 10:45 19.9 4.0 5.0 System Bias Check
Page 3 of 15Cleveland Cliffs Natural Resources, Inc Reference Method Data Barr Engineering United Taconite, LLC Data Logger Output Sampled on 

### 12/10109 Forbes, Minnesota Line 2A WGS (SV048) TIMESTAMP 02_Avg C02_Avg S02_Avg TS Percent Percent PPM 

### 12/10/2009 10:46 20.0 4.0 4.0 02 20, C02 4.0 System Bias Check 

### 12/10/2009 10:46 20.2 3.0 3.5 System Bias Check 

### 12/10/2009 10:46 20.2 3.0 3.4 System Bias Check 

### 12/10/2009 10:47 13.0 2.6 3.3 System Bias Check 

### 12/10/200910:47 0.3 0.2 2.7 System Bias Check 

### 12/10/200910:47 0.2 0.1 2.7 System Bias Check 

### 12/10/2009 10:48 0.1 0.1 2.6 System Bias Check 

### 12/10/2009 10:48 0.1 0.0 2.7 02, C02, S02 Zero System Bias Check 

### 12/10/2009 10:48 0.1 0.0 2.5 System Bias Check 

### 12/10/2009 10:49 0.1 0.0 2.4 System Bias Check 

### 12110/2009 10:49 0.1 0.0 2.3 System Bias Check 

### 12/10/2009 10:49 0.1 0.0 2.2 System Bias Check 

### 12/10/2009 10:50 3.8 0.0 2.1 System Bias Check 

### 12110/2009 10:50 20.2 0.1 1.7 

### 12/10/2009 10:50 20.9 0.1 1.4 

### 12/10/2009 10:51 20.9 0.1 1.3 

### 12/10/2009 10:51 18.7 1.5 52.1 In Stack 

### 12/10/2009 10:51 18.1 1.9 164.5 In Stack 

### 12/10/2009 10:52 18.1 1.9 194.5 In Stack 

### 12/10/200910:52 18.1 1.9 196.7 In Stack 

### 12/10/2009 10:52 18.1 1.9 197.5 In Stack 

### 12/10/2009 10:53 18.1 1.9 199.6 In Stack 

### 12/10/2009 10:53 18.1 1.9 200.6 In Stack 

### 12/10/2009 10:53 18.1 1.9 200.4 In Stack 

### 12/10/2009 10:54 18.1 1.9 200.6 In Stack 

### 12/10/2009 10:54 18.1 1.9 201.3 In Stack 

### 12/10/2009 10:54 18.1 1.9 199.9 In Stack 

### 12/10/2009 10:55 18.1 1.9 200.3 In Stack 

### 12/10/2009 10:55 18.1 1.9 202.4 In Stack 

### 12/10/2009 10:55 18.1 1.9 203.4 In Stack 

### 12/10/2009 10:56 18.1 1.9 202.2 In Stack 

### 12/10/2009 10:56 18.1 1.9 201.2 In Stack 

### 12/10/200910:56 18.1 1.9 202.0 In Stack 

### 12/10/2009 10:57 18.1 1.9 201.8 In Stack 

### 12/10/2009 10:57 18.1 1.9 201.5 In Stack 

### 12/10/2009 10:57 18.1 1.9 203.7 In Stack 

### 12/10/2009 10:58 18.1 1.9 206.6 In Stack 

### 12/10/2009 10:58 18.1 1.9 206.5 In Stack 

### 12/10/2009 10:58 18.1 1.9 205.9 In Stack 

### 12/10/2009 10:59 18.1 1.9 206.6 In Stack 

### 12/10/200910:59 18.1 1.9 206.4 In Stack 

### 12/10/2009 10:59 18.1 1.9 206.7 In Stack 

### 12/10/2009 11 :00 18.1 1.9 207.1 In Stack 

### 12/10/2009 11 :00 18.1 1.9 206.1 In Stack 

### 12/10/2009 11 :00 18.1 1.9 203.9 In Stack 

### 12/10/2009 11 :01 18.1 1.9 202.3 In Stack 

### 12/10/2009 11 :01 18.1 1.9 202.7 In Stack 

### 12/10/2009 11 :01 18.1 1.9 203.9 In Stack 

### 12/10/2009 11 :02 18.1 2.0 205.1 Start Run 1 

### 12/10/2009 11 :02 18.1 2.0 205.3 Point A Run 1 

### 12/10/2009 11 :02 18.1 1.9 204.6 Point A Run 1 

### 12/10/2009 11 :03 18.1 1.9 202.3 Point A Run 1 

### 12/10/2009 11 :03 18.1 2.0 201.2 Point A Run 1 

### 12/10/2009 11 :03 18.1 1.9 201.7 Point A Run 1 

### 12/10/2009 11 :04 18.1 2.0 201.0 Point A Run 1 

### 12/10/2009 11 :04 18.1 2.0 200.7 Point A Run 1 

### 12/10/2009 11 :04 18.1 2.0 201.9 Point A Run 1 

### 12/10/2009 11 :05 18.1 2.0 202.6 Point A Run 1 

### 12/10/2009 11 :05 18.1 1.9 202.1 Point A Run 1 

### 12/10/2009 11 :05 18.1 2.0 200.9 Point A Run 1 

### 12/10/2009 11 :06 18.1 2.0 200.3 Point A Run 1 

### 12/10/2009 11 :06 18.1 2.0 200.5 Point A Run 1 

### 12/10/2009 11 :06 18.1 2.0 201.4 Point A Run 1 

### 12/10/2009 11 :07 18.1 2.0 202.3 Point A Run 1 

### 12/10/2009 11 :07 18.1 2.0 203.7 Point A Run 1 

### 12/10/2009 11 :07 18.1 2.0 205.6 Point A Run 1 

### 12/10/2009 11 :08 18.1 1.9 207.6 Point A Run 1 

### 12/10/2009 11 :08 18.1 1.9 207.3 Point A Run 1 

### 12/10/2009 11 :08 18.1 2.0 206.7 Point A Run 1 

### 12/10/2009 11 :09 18.1 2.0 207.3 Point A Run 1 

### 12/10/2009 11 :09 18.1 2.0 208.3 Point A Run 1 

### 12/10/2009 11 :09 18.1 1.9 208.8 Point A Run 1 

### 12/10/2009 11:10 18.1 2.0 209.1 Point A Run 1
Page 4 of 15Cleveland Cliffs Natural Resources, Inc Reference Method Data Barr Engineering United Taconite, LLC Data Logger Output Sampled on 

### 12/10109 Forbes, Minnesota Line 2A WGS (SV048) TIMESTAMP 02_Avg C02_Avg S02_Avg TS Percent Percent PPM 

### 12/10/2009 11:10 18.1 2.0 210.7 Point A Run 1 

### 12/10/2009 11:10 18.1 1.9 212.1 Point A Run 1 

### 12/10/2009 11:11 18.1 1.9 210.9 Point A Run 1 

### 12/10/2009 11:11 18.1 2.0 210.0 Point A Run 1 

### 12/10/200911:11 18.1 2.0 209.9 Point A Run 1 

### 12/10/2009 11 :12 18.1 1.9 209.5 Point A Run 1 

### 12/10/200911:12 18.1 2.0 208.4 Point A Run 1 

### 12/10/2009 11 :12 18.1 1.9 208.7 Point A Run 1 

### 12/10/200911:13 18.1 1.9 208.2 Point A Run 1 

### 12/10/2009 11 :13 18.1 1.9 207.1 Point A Run 1 

### 12/10/2009 11 :13 18.1 2.0 206.9 Point A Run 1 

### 12/10/2009 11 :14 18.1 2.0 208.7 Point A Run 1 

### 12/10/2009 11 :14 18.1 2.0 210.1 Point A Run 1 

### 12/10/200911:14 18.1 2.0 212.0 Point A Run 1 

### 12/10/2009 11 :15 18.1 2.0 213.5 Point A Run 1 

### 12/10/2009 11 :15 18.1 2.0 214.3 Point A Run 1 

### 12/10/2009 11 :15 18.1 2.0 215.5 Point A Run 1 

### 12/10/200911:16 18.1 1.9 215.4 Point A Run 1 

### 12/10/200911:16 18.1 1.9 214.2 Point A Run 1 

### 12/10/2009 11 :16 18.1 2.0 214.0 Point A Run 1 

### 12/10/2009 11 :17 18.1 1.9 214.4 Point A Run 1 

### 12/10/2009 11 :17 18.1 2.0 214.0 Point A Run 1 

### 12/10/200911:17 18.1 2.0 214.9 Point A Run 1 

### 12/10/2009 11 :18 18.1 2.0 215.6 Point A Run 1 

### 12/10/2009 11 :18 18.1 2.0 215.9 Point A Run 1 

### 12/10/200911:18 18.0 2.0 216.2 Point A Run 1 

### 12/10/200911:19 18.0 2.0 217.0 Point A Run 1 

### 12/10/2009 11:19 18.1 2.0 217.5 Point A Run 1 

### 12/10/2009 11 :19 18.1 2.0 216.5 Point A Run 1 

### 12/10/2009 11 :20 18.1 1.9 215.4 Point A Run 1 

### 12/10/2009 11 :20 18.1 2.0 214.7 Point A Run 1 

### 12110/2009 11 :20 18.1 2.0 215.0 Point A Run 1 

### 12/10/2009 11 :21 18.1 1.9 215.2 Point A Run 1 

### 12/10/2009 11 :21 18.1 2.0 214.3 Point A Run 1 

### 12/10/2009 11 :21 18.1 2.0 214.6 Point A Run 1 

### 12/10/2009 11 :22 18.1 2.0 215.5 Point B Run 1 

### 12/10/2009 11 :22 18.1 2.0 216.1 Point B Run 1 

### 12/10/2009 11 :22 18.1 2.0 217.1 Point B Run 1 

### 12/10/2009 11 :23 18.1 1.9 218.5 Point B Run 1 

### 12/10/2009 11 :23 18.1 2.0 220.4 Point B Run 1 

### 12/10/2009 11 :23 18.1 2.0 223.7 Point B Run 1 

### 12/10/2009 11 :24 18.1 2.0 225.6 Point B Run 1 

### 12/10/2009 11 :24 18.1 2.0 226.3 Point B Run 1 

### 12/10/2009 11 :24 18.1 2.0 227.0 Point B Run 1 

### 12/10/2009 11 :25 18.1 1.9 225.8 Point B Run 1 

### 12/10/2009 11 :25 18.1 2.0 222.4 Point B Run 1 

### 12/10/2009 11 :25 18.0 2.0 220.5 Point B Run 1 

### 12/10/2009 11 :26 18.0 2.0 221.0 Point B Run 1 

### 12/10/2009 11 :26 18.0 2.0 220.4 Point B Run 1 

### 12/10/2009 11 :26 18.0 2.0 220.6 Point B Run 1 

### 12/10/2009 11 :27 18.1 2.0 220.5 Point B Run 1 

### 12/10/2009 11 :27 18.1 2.0 219.4 Point B Run 1 

### 12/10/2009 11 :27 18.0 2.0 218.6 Point B Run 1 

### 12/10/2009 11 :28 18.0 2.0 218.7 Point B Run 1 

### 12/10/2009 11 :28 18.1 2.0 218.3 Point B Run 1 

### 12/10/2009 11 :28 18.1 2.0 216.7 Point B Run 1 

### 12/10/2009 11 :29 18.1 2.0 216.0 Point B Run 1 

### 12/10/2009 11 :29 18.1 2.0 215.9 Point B Run 1 

### 12/10/2009 11 :29 18.1 2.0 215.9 Point B Run 1 

### 12/10/2009 11 :30 18.1 2.0 216.0 Point B Run 1 

### 12/10/2009 11 :30 18.1 2.0 215.2 Point B Run 1 

### 12/10/2009 11 :30 18.1 2.0 212.8 Point B Run 1 

### 12/10/200911:31 18.1 2.0 211.5 Point B Run 1 

### 12/10/200911:31 18.1 2.0 212.5 Point B Run 1 

### 12/10/200911:31 18.0 2.0 212.2 Point B Run 1 

### 12/10/2009 11 :32 18.0 2.0 212.4 Point B Run 1 

### 12/10/2009 11 :32 18.0 2.0 213.0 Point B Run 1 

### 12/10/2009 11 :32 18.1 2.0 214.3 Point B Run 1 

### 12/10/2009 11 :33 18.1 2.0 214.7 Point B Run 1 

### 12/10/2009 11 :33 18.1 2.0 214.1 Point B Run 1 

### 12/10/2009 11 :33 18.1 2.0 213.8 Point B Run 1 

### 12/10/2009 11 :34 18.1 2.0 215.4 Point B Run 1 

### 12/10/2009 11 :34 18.1 2.0 216.9 Point B Run 1
Page 5 of 15Cleveland Cliffs Natural Resources, Inc Reference Method Data Barr Engineering United Taconite, LLC Data Logger Output Sampled on 

### 12/10109 Forbes, Minnesota Line 2A WGS (SV048) TIMESTAMP 02_Avg C02_Avg S02_Avg TS Percent Percent PPM 

### 12/10/2009 11 :34 18.0 2.0 217.6 Point B Run 1 

### 12/10/2009 11 :35 18.1 2.0 218.8 Point B Run 1 

### 12/10/2009 11 :35 18.1 2.0 218.1 Point B Run 1 

### 12/10/2009 11 :35 18.1 2.0 216.3 Point B Run 1 

### 12/10/2009 11 :36 18.1 2.0 216.3 Point B Run 1 

### 12/10/2009 11 :36 18.1 2.0 216.9 Point B Run 1 

### 12/10/2009 11 :36 18.1 2.0 217.2 Point B Run 1 

### 12/10/2009 11 :37 18.1 2.0 217.2 Point B Run 1 

### 12110/2009 11 :37 18.1 2.0 216.9 Point B Run 1 

### 12/10/2009 11 :37 18.1 2.0 215.3 Point B Run 1 

### 12/10/2009 11 :38 18.1 2.0 213.8 Point B Run 1 

### 12/10/2009 11 :38 18.1 2.0 211.9 Point B Run 1 

### 12/10/2009 11 :38 18.1 2.0 208.3 Point B Run 1 

### 12110/2009 11 :39 18.1 2.0 206.1 Point B Run 1 

### 12/10/2009 11 :39 18.1 2.0 206.1 Point B Run 1 

### 12/10/2009 11 :39 18.1 2.0 205.2 Point B Run 1 

### 12/10/2009 11 :40 18.1 2.0 204.1 Point B Run 1 

### 12/10/2009 11 :40 18.1 2.0 205.9 Point B Run 1 

### 12/10/2009 11 :40 18.1 2.0 207.6 Point B Run 1 

### 12/10/2009 11 :41 18.1 2.0 207.7 Point B Run 1 

### 12/10/2009 11 :41 18.1 2.0 207.2 Point B Run 1 

### 12/10/2009 11 :41 18.1 2.0 208.0 Point B Run 1 

### 12/10/2009 11 :42 18.1 2.0 209.0 Point B Run 1 

### 12/10/2009 11 :42 18.1 2.0 209.2 Point B Run 1 

### 12/10/2009 11 :42 18.1 2.0 209.8 Point B Run 1 

### 12/10/2009 11 :43 18.1 2.0 210.6 Point B Run 1 

### 12/10/2009 11 :43 18.1 2.0 209.5 Port Change Run 1 

### 12110/2009 11 :43 20.3 0.6 146.9 Port Change Run 1 

### 12/10/2009 11 :44 20.9 0.1 39.4 Port Change Run 1 

### 12/10/2009 11 :44 20.9 0.1 12.4 Port Change Run 1 

### 12/10/2009 11 :44 20.9 0.1 6.6 Port Change Run 1 

### 12/10/2009 11 :45 20.6 0.4 7.3 Port Change Run 1 

### 12/10/2009 11 :45 18.2 1.9 101.6 Port Change Run 1 

### 12/10/2009 11 :45 18.1 2.0 182.4 Port Change Run 1 

### 12/10/2009 11 :46 18.1 2.0 201.7 Port Change Run 1 

### 12/10/2009 11 :46 18.1 2.0 207.1 Port Change Run 1 

### 12/10/2009 11 :46 18.1 2.0 208.1 Port Change Run 1 

### 12/10/200911:47 18.1 2.0 209.6 Port Change Run 1 

### 12/10/200911:47 18.1 1.9 210.4 Port Change Run 1 

### 12/10/2009 11:47 18.1 1.9 206.6 Port Change Run 1 

### 12/10/2009 11 :48 18.1 1.9 206.4 Port Change Run 1 

### 12/10/2009 11 :48 18.1 2.0 207.6 Port Change Run 1 

### 12/10/2009 11 :48 18.1 2.0 211.6 Port Change Run 1 

### 12/10/2009 11 :49 18.1 2.0 212.9 Port Change Run 1 

### 12/10/2009 11 :49 18.1 2.0 213.2 Port Change Run 1 

### 12/10/2009 11 :49 18.1 2.0 211.7 Port Change Run 1 

### 12/10/2009 11 :50 18.1 2.0 211.1 Port Change Run 1 

### 12/10/2009 11 :50 18.1 1.9 210.2 Port Change Run 1 

### 12/10/2009 11 :50 18.1 1.9 207.6 Point C Run 1 

### 12/10/2009 11 :51 18.1 2.0 205.4 Point C Run 1 

### 12/10/2009 11 :51 18.1 2.0 204.4 Point C Run 1 

### 12/10/2009 11 :51 18.1 2.0 202.4 Point C Run 1 

### 12/10/2009 11 :52 18.1 2.0 201.3 Point C Run 1 

### 12/10/2009 11 :52 18.0 2.0 203.1 Point C Run 1 

### 12/10/2009 11 :52 18.1 2.0 205.1 Point C Run 1 

### 12/10/2009 11 :53 18.1 2.0 204.5 Point C Run 1 

### 12/10/2009 11 :53 18.1 2.0 203.8 Point C Run 1 

### 12110/2009 11 :53 18.1 2.0 206.6 PointC Run 1 

### 12/10/2009 11 :54 18.1 2.0 209.6 Point C Run 1 

### 12/10/2009 11 :54 18.1 2.0 209.5 Point C Run 1 

### 12/10/2009 11 :54 18.1 2.0 207.5 Point C Run 1 

### 12/10/2009 11 :55 18.1 2.0 206.7 Point C Run 1 

### 12/10/2009 11 :55 18.1 2.0 207.4 Point C Run 1 

### 12/10/2009 11 :55 18.1 2.0 207.8 Point C Run 1 

### 12110/2009 11 :56 18.1 2.0 207.5 Point C Run 1 

### 12/10/2009 11 :56 18.1 2.0 206.7 Point C Run 1 

### 12/10/2009 11 :56 18.1 2.0 206.7 Point C Run 1 

### 12/10/2009 11:57 18.1 2.0 206.9 Point C Run 1 

### 12/10/2009 11 :57 18.1 2.0 208.2 Point C Run 1 

### 12/10/2009 11 :57 18.1 2.0 209.1 Point C Run 1 

### 12/10/2009 11 :58 18.1 2.0 210.1 Point C Run 1 

### 12/10/2009 11 :58 18.1 2.0 211.5 Point C Run 1 

### 12/10/2009 11 :58 18.1 1.9 211.8 Point C Run 1
Page 6 of 15Cleveland Cliffs Natural Resources, Inc Reference Method Data Barr Engineering United Taconite, LLC Data Logger Output Sampled on 12110/09 Forbes, Minnesota Line 2A WGS (SV048) TIMESTAMP 02_Avg C02_Avg S02_Avg TS Percent Percent PPM 12/10/2009 11 :59 18.1 2.0 210.7 Point C Run 1 12/10/2009 11 :59 18.1 2.0 211.6 Point C Run 1 12/10/2009 11 :59 18.1 2.0 213.8 Point C Run 1 12/10/2009 12:00 18.1 2.0 214.9 Point C Run 1 12/10/2009 12:00 18.1 2.0 213.7 Point C Run 1 12110/2009 12:00 18.1 2.0 212.1 PointC Run 1 12/10/200912:01 18.0 2.0 212.8 PointC Run 1 12/10/2009 12:01 18.0 2.0 214.7 PointC Run 1 12/10/2009 12:01 18.0 2.0 216.1 Point C Run 1 12/10/2009 12:02 18.1 2.0 216.2 Point C Run 1 12/10/2009 12:02 18.0 2.0 214.2 Point C Run 1 12/10/2009 12:02 18.0 2.0 214.1 Point C Run 1 12/10/2009 12:03 18.1 2.0 214.8 Point C Run 1 12/10/2009 12:03 18.1 2.0 213.9 Point C Run 1 12/10/2009 12:03 18.0 2.0 212.2 Point C Run 1 12/10/2009 12:04 18.0 2.0 211.7 Point C Run 1 12/10/2009 12:04 18.1 2.0 211.3 Point C Run 1 12/10/2009 12:04 18.0 2.0 210.8 Point C Run 1 12/10/2009 12:05 18.1 2.0 210.8 Point C Run 1 12/10/2009 12:05 18.1 2.0 209.9 Point C Run 1 12/10/2009 12:05 18.1 2.0 210.2 Point C Run 1 12/10/2009 12:06 18.1 2.0 210.2 Point C Run 1 12/10/2009 12:06 18.1 2.0 210.8 Point C Run 1 12/10/2009 12:06 18.1 2.0 211.8 Point C Run 1 12/10/2009 12:07 18.0 2.0 212.8 Point C Run 1 12/10/2009 12:07 18.1 2.0 215.1 Point C Run 1 12/10/2009 12:07 18.1 2.0 215.9 Point C Run 1 12/10/2009 12:08 18.1 2.0 213.9 Point C Run 1 12/10/2009 12:08 18.1 2.0 212.2 Point C Run 1 12/10/2009 12:08 18.1 2.0 212.9 End Run 1 12/10/2009 12:09 18.1 2.0 213.4 12/10/2009 12:09 18.1 2.0 213.0 12/10/2009 12:09 18.1 2.0 213.0 12/10/200912:10 18.1 2.0 211.4 12/10/2009 12:10 18.1 2.0 209.9 12/10/2009 12:10 18.0 2.0 211.0 12/10/2009 12:11 18.1 2.0 210.7 12/10/2009 12:11 18.0 2.0 211.1 12/10/200912:11 18.0 2.0 213.5 12/10/200912:12 18.1 2.0 213.8 12/10/200912:12 15.5 1.7 208.4 12/10/200912:12 1.2 0.2 119.7 12/10/200912:13 0.4 0.1 47.4 12/10/2009 12:13 0.2 0.1 16.9 Drift Check 12/10/200912:13 0.2 0.1 8.6 Drift Check 12110/2009 12:14 0.1 0.1 6.2 Drift Check 12/10/200912:14 0.1 0.0 5.2 Drift Check 12/10/200912:14 

### 0.1 0.0 4.5 02, C02, S02 Zero Drift Check 12/10/200912:15 1.3 0.2 5.0 Drift Check 12/10/200912:15 8.6 1.0 75.8 Drift Check 12/10/200912:15 2.7 0.5 42.1 Drift Check 12/10/200912:16 19.0 3.7 10.2 Drift Check 12/10/200912:16 19.9 3.9 4.1 Drift Check 12/10/200912:16 19.9 3.9 3.0 Drift Check 12/10/200912:17 19.9 3.9 2.4 Drift Check 12/10/200912:17 

### 20.0 4.0 2.4 02 20, Co2 4.0 Drift Check 12/10/200912:17 20.0 4.0 2.1 Drift Check 12/10/2009 12:18 20.0 4.0 2.0 Drift Check 12/10/200912:18 19.1 3.1 50.8 Drift Check 12/10/200912:18 18.5 3.7 36.5 Drift Check 12/10/200912:19 1.5 0.4 104.1 Drift Check 12/10/200912:19 0.2 0.1 212.2 Drift Check 12/10/200912:19 0.1 0.1 244.9 Drift Check 12/10/2009 12:20 0.1 0.1 253.3 Drift Check 12/10/2009 12:20 0.1 0.1 256.3 Drift Check 12/10/2009 12:20 0.1 0.1 258.1 Drift Check 12/10/200912:21 0.1 0.1 258.1 Drift Check 12/10/2009 12:21 0.1 0.1 260.7 Drift Check 12/10/200912:21 0.1 0.0 260.6 Drift Check 12/10/2009 12:22 0.1 0.0 

### 260.3 261.9 S02 Drift Check 12/10/2009 12:22 0.2 0.1 260.5 Drift Check 12/10/2009 12:22 14.5 1.6 255.6 Drift Check 12/10/2009 12:23 18.0 1.9 224.0 Drift Check
Page 7 of 15Cleveland Cliffs Natural Resources, Inc Reference Method Data Barr Engineering United Taconite, LLC Data Logger Output Sampled on 12/10109 Forbes, Minnesota line 2A WGS (SV048) TIMESTAMP 02_Avg C02_Avg S02_Avg TS Percent Percent PPM 12/10/2009 12:23 18.0 2.0 215.3 12/10/2009 12:23 18.0 2.0 213.9 In Stack 12/10/2009 12:24 18.0 2.0 211.1 In Stack 12/10/2009 12:24 18.0 2.0 209.0 In Stack 12/10/2009 12:24 18.0 2.0 208.8 In Stack 12/10/2009 12:25 18.0 2.0 205.4 In Stack 12/10/2009 12:25 18.0 2.0 207.3 In Stack 12/10/2009 12:25 18.0 2.0 210.6 In Stack 12/10/2009 12:26 18.0 2.0 210.4 In Stack 12/10/2009 12:26 18.0 2.0 209.4 In Stack 12/10/2009 12:26 18.0 2.0 209.3 In Stack 12/10/2009 12:27 18.0 2.0 209.5 In Stack 12/10/2009 12:27 18.1 2.0 210.5 In Stack 12/10/2009 12:27 18.1 2.0 210.1 In Stack 12/10/2009 12:28 18.0 2.0 210.6 In Stack 12/10/2009 12:28 18.1 2.0 212.4 In Stack 12/10/2009 12:28 18.1 1.9 212.0 In Stack 12/10/2009 12:29 18.1 2.0 209.9 In Stack 12/10/2009 12:29 18.0 2.0 209.4 In Stack 12/10/2009 12:29 18.1 2.0 210.9 In Stack 12/10/2009 12:30 18.1 2.0 211.2 In Stack 12/10/2009 12:30 18.1 2.0 209.8 In Stack 12/10/2009 12:30 18.1 2.0 208.9 In Stack 12/10/200912:31 18.0 2.0 209.4 In Stack 12/10/200912:31 18.1 2.0 210.6 In Stack 12/10/200912:31 18.1 2.0 210.1 In Stack 12/10/2009 12:32 18.1 2.0 209.3 In Stack 12/10/2009 12:32 18.0 2.0 210.2 In Stack 12/10/2009 12:32 18.1 2.0 211.8 In Stack 12/10/2009 12:33 18.1 2.0 212.7 In Stack 12/10/2009 12:33 18.0 2.0 212.3 In Stack 12/10/2009 12:33 18.0 2.0 212.8 In Stack 12/10/2009 12:34 18.0 2.0 214.2 In Stack 12/10/200912:34 18.1 2.0 215.3 In Stack 12/10/2009 12:34 18.0 2.0 216.2 In Stack 12/10/2009 12:35 18.1 2.0 216.9 In Stack 12/10/2009 12:35 18.1 2.0 215.6 In Stack 12/10/2009 12:35 18.0 2.0 214.5 In Stack 12/10/2009 12:36 18.0 2.0 215.3 In Stack 12/10/2009 12:36 18.0 2.0 217.1 In Stack 12/10/200912:36 18.0 2.0 216.5 In Stack 12/10/2009 12:37 18.0 2.0 215.8 In Stack 12/10/2009 12:37 18.0 2.0 216.5 In Stack 12/10/200912:37 18.0 2.0 217.0 In Stack 12/10/2009 12:38 18.0 2.0 217.0 In Stack 12/10/2009 12:38 18.0 2.0 218.0 In Stack 12/10/2009 12:38 18.0 2.0 219.5 In Stack 12/10/2009 12:39 18.0 2.0 219.6 Start Run 2 12/10/2009 12:39 18.0 2.0 221.0 Run 2 12/10/2009 12:39 18.1 2.0 221.6 Run 2 12/10/2009 12:40 18.1 2.0 221.7 Run 2 12/10/2009 12:40 18.0 2.0 223.0 Run 2 12/10/2009 12:40 18.1 2.0 225.3 Run 2 12/10/200912:41 18.1 2.0 226.3 Run 2 12/10/200912:41 18.0 2.0 226.0 Run 2 12/10/2009 12:41 18.1 2.0 226.6 Run 2 12/10/2009 12:42 18.1 2.0 225.8 Run 2 12/10/2009 12:42 18.1 2.0 224.8 Run 2 12/10/2009 12:42 18.0 2.0 224.7 Run 2 12/10/2009 12:43 18.1 2.0 224.1 Run 2 12/10/200912:43 18.1 2.0 222.2 Run 2 12/10/2009 12:43 18.0 2.0 220.3 Run 2 12/10/2009 12:44 18.0 2.0 220.8 Run 2 12/10/200912:44 18.1 2.0 221.1 Run 2 12/10/200912:44 18.1 2.0 220.4 Run 2 12/10/2009 12:45 18.1 2.0 220.7 Run 2 12/10/2009 12:45 18.1 2.0 221.1 Run 2 12/10/2009 12:45 18.1 2.0 220.4 Run 2 12/10/2009 12:46 18.1 1.9 218.4 Run 2 12/10/2009 12:46 18.1 1.9 215.6 Run 2 12/10/200912:46 18.1 1.9 214.2 Run 2 12/10/2009 12:47 18.1 1.9 213.1 Run 2 12/10/200912:47 18.1 1.9 212.4 Run 2
Page 8 of 15Cleveland Cliffs Natural Resources, Inc Reference Method Data Barr Engineering United Taconite, LLC Data Logger Output Sampled on 12/10109 Forbes, Minnesota Line 2A WGS (SV048) TIMESTAMP 02_Avg C02_Avg S02_Avg TS Percent Percent PPM 12/10/200912:47 18.1 1.9 212.7 Run 2 12/10/2009 12:48 18.1 1.9 212.0 Run 2 12/10/2009 12:48 18.1 2.0 211.3 Run 2 12/10/2009 12:48 18.1 1.9 212.6 Run 2 12/10/2009 12:49 18.1 1.9 212.2 Run 2 12110/2009 12:49 18.1 1.9 210.9 Run 2 12/10/2009 12:49 18.1 1.9 210.7 Run 2 12/10/200912:50 18.1 1.9 210.7 Run 2 12/10/2009 12:50 18.1 1.9 210.8 Run 2 12/10/2009 12:50 18.1 1.9 211.6 Run 2 12/10/2009 12:51 18.1 1.9 212.4 Run 2 12/10/200912:51 18.1 1.9 212.5 Run 2 12/10/2009 12:51 18.1 1.9 212.8 Run 2 12/10/2009 12:52 18.1 2.0 213.3 Run 2 12/10/2009 12:52 18.1 2.0 214.3 Run 2 12110/2009 12:52 18.1 1.9 215.1 Run 2 12/10/2009 12:53 18.1 1.9 214.4 Run 2 12/10/2009 12:53 18.1 1.9 213.4 Run 2 12/10/2009 12:53 18.1 1.9 214.2 Run 2 12/10/2009 12:54 18.1 1.9 214.5 Run 2 12/10/2009 12:54 18.1 1.9 214.7 Run 2 12/10/200912:54 18.1 1.9 213.0 Run 2 12/10/200912:55 18.1 1.9 210.7 Run 2 12/10/2009 12:55 18.1 2.0 210.3 Run 2 12/10/2009 12:55 18.1 2.0 211.0 Run 2 12/10/2009 12:56 18.1 2.0 209.9 Run 2 12/10/2009 12:56 18.1 2.0 209.1 Run 2 12/10/2009 12:56 18.1 1.9 211.3 Run 2 12/10/2009 12:57 18.1 1.9 212.0 Run 2 12/10/2009 12:57 18.1 1.9 211.5 Run 2 12/10/2009 12:57 18.1 1.9 211.2 Run 2 12/10/2009 12:58 18.1 1.9 209.3 Run 2 12/10/2009 12:58 18.1 1.9 206.8 Run 2 12/10/2009 12:58 18.1 1.9 206.6 Run 2 12/10/2009 12:59 18.1 1.9 206.6 Run 2 12/10/2009 12:59 18.1 2.0 205.8 Run 2 12/10/2009 12:59 18.1 1.9 205.4 Run 2 12/10/2009 13:00 18.1 2.0 205.5 Run 2 12/10/2009 13:00 18.1 2.0 206.5 Run 2 12/10/2009 13:00 18.1 2.0 207.5 Run 2 12/10/2009 13:01 18.1 2.0 209.3 Run 2 12/10/200913:01 18.1 2.0 211.2 Run 2 12/10/2009 13:01 18.1 1.9 210.7 Run 2 12/10/2009 13:02 18.1 2.0 208.2 Run 2 12/10/2009 13:02 18.1 2.0 207.5 Run 2 12/10/2009 13:02 18.1 2.0 208.2 Run 2 12/10/2009 13:03 18.5 1.7 204.9 Port Change Run 2 12110/2009 13:03 20.8 0.2 98.1 Port Change Run 2 12/10/2009 13:03 20.9 0.1 24.9 Port Change Run 2 12/10/2009 13:04 20.9 0.1 9.6 Port Change Run 2 12/10/2009 13:04 20.5 0.4 8.4 Port Change Run 2 12/10/200913:04 18.2 1.9 105.9 Port Change Run 2 12/10/2009 13:05 18.1 2.0 186.3 Port Change Run 2 12/10/2009 13:05 18.1 2.0 204.9 Port Change Run 2 12/10/2009 13:05 18.1 2.0 211.0 Port Change Run 2 12/10/2009 13:06 18.1 1.9 213.0 Port Change Run 2 12/10/2009 13:06 18.1 1.9 211.1 Port Change Run 2 12/10/2009 13:06 18.1 1.9 212.1 Port Change Run 2 12/10/2009 13:07 18.1 1.9 213.7 Port Change Run 2 12/10/2009 13:07 18.1 2.0 213.6 Port Change Run 2 12/10/2009 13:07 18.1 2.0 213.8 Port Change Run 2 12/10/2009 13:08 18.1 1.9 211.3 Port Change Run 2 12/10/2009 13:08 18.1 1.9 210.7 Port Change Run 2 12/10/2009 13:08 18.1 2.0 210.7 Port Change Run 2 12/10/2009 13:09 18.1 2.0 212.6 Port Change Run 2 12/10/2009 13:09 18.1 2.0 213.6 Port Change Run 2 12/10/2009 13:09 18.1 2.0 212.8 Port Change Run 2 12/10/200913:10 18.1 2.0 212.5 Run 2 12/10/200913:10 18.0 2.0 213.4 Run 2 12/10/200913:10 18.1 2.0 213.6 Run 2 12/10/2009 13:11 18.1 2.0 212.2 Run 2 12/10/2009 13:11 18.1 2.0 212.0 Run 2 12110/200913:11 18.1 2.0 211.4 Run 2
Page 9 of 15Cleveland Cliffs Natural Resources, Inc Reference Method Data Barr Engineering United Taconite, LLC Data Logger Output Sampled on 12/10109 Forbes, Minnesota Line 2A WGS (SV048) TIMESTAMP 02_Avg C02_Avg S02_Avg TS Percent Percent PPM 12/10/2009 13:12 18.1 2.0 210.9 Run 2 12/10/200913:12 18.1 2.0 212.1 Run 2 12/10/200913:12 18.1 2.0 212.5 Run 2 12/10/200913:13 18.1 2.0 213.7 Run 2 12/10/200913:13 18.1 2.0 215.4 Run 2 12/10/2009 13:13 18.1 2.0 216.3 Run 2 12/10/2009 13:14 18.1 2.0 215.7 Run 2 12/10/200913:14 18.1 2.0 215.2 Run 2 12/10/200913:14 18.1 2.0 215.4 Run 2 12/10/200913:15 18.1 2.0 215.1 Run 2 12/10/200913:15 18.1 2.0 216.0 Run 2 12/10/200913:15 18.1 2.0 217.5 Run 2 12110/200913:16 18.1 2.0 218.8 Run 2 12/10/200913:16 18.1 2.0 219.4 Run 2 12/10/200913:16 18.1 1.9 218.0 Run 2 12/10/200913:17 18.1 2.0 216.4 Run 2 12/10/2009 13:17 18.1 2.0 217.3 Run 2 12/10/2009 13:17 18.1 2.0 218.9 Run 2 12/10/2009 13:18 18.1 2.0 220.7 Run 2 12/10/200913:18 18.1 1.9 221.5 Run 2 12/10/200913:18 18.1 1.9 220.6 Run 2 12/10/200913:19 18.1 1.9 220.2 Run 2 12/10/200913:19 18.1 2.0 219.7 Run 2 12/10/200913:19 18.1 2.0 219.7 Run 2 12/10/2009 13:20 18.1 2.0 220.0 Run 2 12/10/2009 13:20 18.1 2.0 219.7 Run 2 12/10/2009 13:20 18.1 2.0 218.7 Run 2 12/10/200913:21 18.1 1.9 217.9 Run 2 12/10/200913:21 18.1 1.9 216.1 Run 2 12/10/2009 13:21 18.1 2.0 213.6 Run 2 12/10/2009 13:22 18.1 2.0 212.5 Run 2 12/10/2009 13:22 18.1 2.0 213.9 Run 2 12/10/2009 13:22 18.1 2.0 215.4 Run 2 12/10/2009 13:23 18.1 2.0 216.0 Run 2 12110/2009 13:23 18.1 2.0 216.0 Run 2 12/10/2009 13:23 18.1 2.0 216.1 Run 2 12/10/2009 13:24 18.1 2.0 217.1 Run 2 12/10/2009 13:24 18.1 2.0 216.9 Run 2 12/10/2009 13:24 18.1 2.0 216.0 Run 2 12/10/200913:25 18.1 2.0 215.8 Run 2 12/10/2009 13:25 18.1 2.0 215.9 Run 2 12/10/2009 13:25 18.1 2.0 215.9 Run 2 12/10/2009 13:26 18.1 2.0 215.4 Run 2 12/10/2009 13:26 18.1 2.0 214.0 Run 2 12/10/2009 13:26 18.1 2.0 212.0 Run 2 12/10/2009 13:27 18.1 2.0 209.7 Run 2 12/10/2009 13:27 18.1 2.0 208.2 Run 2 12/10/2009 13:27 18.1 2.0 207.2 Run 2 12/10/2009 13:28 18.1 2.0 206.8 Run 2 12/10/2009 13:28 18.1 2.0 207.0 Run 2 12/10/2009 13:28 18.1 2.0 206.7 Run 2 12/10/200913:29 18.1 2.0 206.3 Run 2 12/10/2009 13:29 18.1 2.0 206.6 Run 2 12/10/2009 13:29 18.1 2.0 206.7 Run 2 12/10/2009 13:30 18.1 2.0 205.9 Run 2 12/10/2009 13:30 18.1 2.0 204.8 Run 2 12/10/2009 13:30 18.1 2.0 203.7 Run 2 12/10/200913:31 18.1 2.0 203.1 Run 2 12/10/2009 13:31 18.1 2.0 203.3 Run 2 12/10/200913:31 18.1 2.0 204.3 Run 2 12/10/2009 13:32 18.1 2.0 205.5 Run 2 12/10/2009 13:32 18.1 2.0 206.4 Run 2 12/10/2009 13:32 18.1 2.0 206.2 Run 2 12/10/2009 13:33 18.1 2.0 206.3 Run 2 12/10/2009 13:33 18.1 2.0 206.4 Run 2 12/10/2009 13:33 18.1 2.0 205.7 Run 2 12/10/2009 13:34 18.1 1.9 204.0 Run 2 12/10/2009 13:34 18.1 2.0 203.2 Run 2 12/10/2009 13:34 18.1 1.9 204.2 Run 2 12110/2009 13:35 18.1 2.0 204.1 Run 2 12/10/2009 13:35 18.1 2.0 203.8 Run 2 12/10/2009 13:35 18.1 2.0 204.4 Run 2 12/10/2009 13:36 18.1 2.0 204.8 Run 2
Page 10 of 15Cleveland Cliffs Natural Resources, Inc Reference Method Data Barr Engineering United Taconite, LLC Data Logger Output Sampled on 12/10109 Forbes, Minnesota Line 2A WGS (SV048) TIMESTAMP 02_Avg C02_Avg S02_Avg TS Percent Percent PPM 12/10/2009 13:36 18.1 2.0 204.3 Run 2 12/10/2009 13:36 18.1 2.0 202.9 Run 2 12/10/2009 13:37 18.1 2.0 202.1 Run 2 12110/2009 13:37 18.1 2.0 203.0 Run 2 12/10/2009 13:37 18.1 2.0 203.5 Run 2 12/10/2009 13:38 18.1 2.0 202.8 Run 2 12/10/2009 13:38 18.1 2.0 203.9 Run 2 12/10/2009 13:38 18.1 2.0 205.7 Run 2 12/10/200913:39 18.1 2.0 205.8 Run 2 12/10/2009 13:39 18.1 2.0 205.8 Run 2 12/10/2009 13:39 18.1 2.0 205.1 Run 2 12/10/2009 13:40 18.1 2.0 205.0 Run 2 12/10/2009 13:40 18.1 2.0 206.1 Run 2 12/10/2009 13:40 18.1 2.0 206.8 Run 2 12/10/2009 13:41 18.1 2.0 207.2 Run 2 12/10/2009 13:41 18.1 2.0 208.3 Run 2 12/10/200913:41 18.1 2.0 209.1 Run 2 12/10/2009 13:42 18.1 2.0 209.4 Run 2 12/10/2009 13:42 18.1 2.0 211.8 Run 2 12/10/2009 13:42 18.1 2.0 216.7 Run 2 12/10/2009 13:43 18.1 2.0 219.2 Run 2 12/10/2009 13:43 18.1 2.0 219.8 Run 2 12/10/2009 13:43 18.1 2.0 219.3 Run 2 12/10/2009 13:44 18.1 2.0 217.4 Run 2 12/10/2009 13:44 18.1 2.0 216.9 Run 2 12/10/2009 13:44 18.0 2.0 217.7 End Run 2 12/10/2009 13:45 18.0 2.0 220.2 12/10/2009 13:45 18.0 2.0 224.5 12/10/2009 13:45 18.0 2.0 226.5 12/10/200913:46 18.0 2.0 226.5 12/10/2009 13:46 18.0 2.0 226.3 12/10/2009 13:46 18.0 2.0 225.0 12/10/200913:47 18.0 2.0 224.1 12/10/200913:47 18.0 2.0 222.2 12/10/2009 13:47 18.0 2.0 219.7 12/10/2009 13:48 18.0 2.0 219.4 Drift Check 12/10/2009 13:48 15.9 1.8 220.4 Drift Check 12/10/2009 13:48 1.4 0.2 220.6 Drift Check 12/10/2009 13:49 0.5 0.1 230.7 Drift Check 12/10/200913:49 0.2 0.1 252.6 Drift Check 12/10/2009 13:49 0.2 0.1 257.8 Drift Check 12/10/2009 13:50 0.2 0.0 259.9 Drift Check 12/10/2009 13:50 0.2 0.0 261.5 Drift Check 12/10/2009 13:50 0.2 0.0 261.1 Drift Check 12/10/200913:51 0.2 0.0 261.2 Drift Check 12/10/2009 13:51 0.1 0.0 

### 261.2 261.9 S02 Drift Check 12/10/200913:51 0.1 0.0 262.1 Drift Check 12/10/2009 13:52 2.5 0.3 262.8 Drift Check 12/10/2009 13:52 4.2 0.5 262.2 Drift Check 12/10/2009 13:52 3.2 0.4 256.1 Drift Check 12/10/2009 13:53 17.5 1.9 224.9 Drift Check 12/10/2009 13:53 18.0 1.9 211.7 Drift Check 12/10/2009 13:53 18.1 1.9 207.4 Drift Check 12/10/2009 13:54 18.1 1.9 206.0 Drift Check 12/10/2009 13:54 18.1 1.9 205.7 Drift Check 12/10/2009 13:54 18.1 2.0 204.6 Drift Check 12/10/2009 13:55 18.1 2.0 205.2 Drift Check 12/10/2009 13:55 18.1 2.0 206.0 Drift Check 12/10/200913:55 18.1 1.9 205.9 Drift Check 12/10/2009 13:56 17.8 1.9 204.9 Drift Check 12/10/2009 13:56 2.9 0.4 145.9 Drift Check 12/10/2009 13:56 0.3 0.1 50.2 Drift Check 12/10/2009 13:57 0.2 0.1 18.1 Drift Check 12/10/2009 13:57 0.1 0.1 9.2 Drift Check 12/10/2009 13:57 0.1 0.0 6.7 Drift Check 12/10/2009 13:58 0.1 0.0 5.9 Drift Check 12/10/2009 13:58 0.1 0.0 5.2 Drift Check 12/10/2009 13:58 

### 0.1 0.0 4.9 02, C02, S02 Zero Drift Check 12/10/2009 13:59 9.6 1.1 53.4 Drift Check 12/10/2009 13:59 0.5 0.1 57.9 Drift Check 12/10/200913:59 15.5 3.0 14.9 Drift Check 12/10/2009 14:00 19.8 3.9 5.3 Drift Check 12/10/2009 14:00 19.9 3.9 3.7 Drift Check
Page 11 of 15Cleveland Cliffs Natural Resources, Inc Reference Method Data Barr Engineering United Taconite, LLC Data Logger Output Sampled on 12/10109 Forbes, Minnesota Line 2A WGS (SV048) TIMESTAMP 02_Avg C02_Avg S02_Avg TS Percent Percent PPM 12/10/2009 14:00 19.9 3.9 3.1 Drift Check 12/10/2009 14:01 19.9 4.0 2.8 Drift Check 12/10/200914:01 19.9 4.0 2.7 Drift Check 12/10/200914:01 19.9 4.0 2.5 Drift Check 12/10/200914:02 19.9 4.0 2.4 Drift Check 12/10/200914:02 

### 19.9 4.0 2.3 02 20.0, C02 4.0 Drift Check 12/10/200914:02 19.9 4.0 2.2 Drift Check 12/10/2009 14:03 18.9 2.9 34.7 Drift Check 12/10/2009 14:03 18.0 2.1 156.1 Drift Check 12/10/2009 14:03 18.0 2.0 196.1 In Stack 12/10/2009 14:04 18.0 2.0 199.7 In Stack 12/10/200914:04 18.0 2.0 200.6 In Stack 12/10/200914:04 18.0 2.0 202.0 In Stack 12/10/2009 14:05 18.0 2.0 204.6 In Stack 12/10/2009 14:05 18.0 2.0 207.5 In Stack 12/10/200914:05 18.0 2.0 208.2 In Stack 12/10/200914:06 18.0 2.0 207.1 In Stack 12/10/2009 14:06 18.0 2.0 207.4 In Stack 12/10/200914:06 18.1 2.0 206.9 In Stack 12/10/200914:07 18.1 2.0 204.9 In Stack 12/10/200914:07 18.0 2.0 204.1 In Stack 12/10/200914:07 18.0 2.0 205.6 In Stack 12/10/200914:08 18.1 2.0 207.3 In Stack 12/10/2009 14:08 18.1 2.0 207.9 In Slack 12/10/200914:08 18.0 2.0 208.1 In Stack 12/10/2009 14:09 18.0 2.0 209.7 In Slack 12/10/200914:09 18.1 2.0 210.1 In Stack 12/10/2009 14:09 18.1 2.0 208.2 In Stack 12/10/2009 14:10 18.0 2.0 206.7 In Slack 12/10/2009 14:10 18.0 2.0 207.9 In Stack 12/10/200914:10 18.0 2.0 209.0 In Stack 12/10/2009 14:11 18.0 2.0 207.8 In Stack 12/10/200914:11 18.1 2.0 207.7 In Stack 12/10/200914:11 18.1 1.9 208.1 In Stack 12/10/200914:12 18.1 2.0 207.3 In Stack 12/10/200914:12 18.0 2.0 206.7 In Stack 12/10/200914:12 18.0 2.0 207.6 In Slack 12/10/200914:13 18.0 2.0 208.7 Start Run 3 12/10/200914:13 18.0 2.0 208.3 Run 3 12/10/2009 14:13 18.0 2.0 208.1 Run 3 12/10/200914:14 18.0 2.0 206.0 Run 3 12/10/200914:14 18.0 2.0 205.8 Run 3 12/10/2009 14:14 18.0 2.0 208.0 Run 3 12/10/200914:15 18.0 2.0 209.4 Run 3 12/10/200914:15 18.0 2.0 210.1 Run 3 12/10/200914:15 18.0 2.0 211.4 Run 3 12/10/200914:16 18.1 2.0 211.1 Run 3 12/10/200914:16 18.1 2.0 207.7 Run 3 12/10/200914:16 18.1 2.0 206.4 Run 3 12/10/200914:17 18.0 2.0 208.0 Run 3 12/10/2009 14:17 18.0 2.0 210.6 Run 3 12/10/200914:17 18.0 2.0 212.7 Run 3 12/10/200914:18 18.0 2.0 214.5 Run 3 12/10/200914:18 18.0 2.0 214.1 Run 3 12/10/2009 14:18 18.0 2.0 212.6 Run 3 12/10/2009 14:19 18.0 2.0 210.8 Run 3 12/10/200914:19 18.0 2.0 209.6 Run 3 12/10/200914:19 18.0 2.0 208.5 Run 3 12/10/2009 14:20 18.0 2.0 209.0 Run 3 12/10/2009 14:20 18.1 2.0 210.9 Run 3 12/10/2009 14:20 18.1 2.0 210.2 Run 3 12/10/200914:21 18.1 2.0 208.7 Run 3 12/10/200914:21 18.0 2.0 209.7 Run 3 12/10/200914:21 18.0 2.0 212.4 Run 3 12/10/2009 14:22 18.0 2.0 214.2 Run 3 12/10/2009 14:22 18.0 2.0 215.3 Run 3 12/10/2009 14:22 18.0 2.0 216.8 Run 3 12/10/2009 14:23 18.0 2.0 217.3 Run 3 12/10/2009 14:23 18.0 2.0 216.6 Run 3 12/10/2009 14:23 18.0 2.0 216.1 Run 3 12/10/200914:24 18.0 2.0 217.2 Run 3 12/10/2009 14:24 18.0 2.0 219.2 Run 3 12/10/2009 14:24 18.0 2.0 221.1 Run 3
Page 12 of 15Cleveland Cliffs Natural Resources. Inc Reference Method Data Barr Engineering United Taconite. LLC Data Logger Output Sampled on 12/10109 Forbes. Minnesota Line 2A WGS (SV048) TIMESTAMP 02_Avg C02_Avg S02_Avg TS Percent Percent PPM 12110/2009 14:25 18.0 2.0 221.1 Run 3 12/10/200914:25 18.0 2.0 219.8 Run 3 12/10/2009 14:25 18.0 2.0 218.1 Run 3 12/10/2009 14:26 18.0 2.0 215.6 Run 3 12/10/2009 14:26 18.0 2.0 212.4 Run 3 12/10/2009 14:26 18.0 2.0 209.9 Run 3 12110/2009 14:27 18.0 2.0 209.6 Run 3 12/10/200914:27 18.1 2.0 210.6 Run 3 12/10/200914:27 18.0 2.0 211.8 Run 3 12/10/200914:28 18.1 2.0 212.5 Run 3 12/10/200914:28 18.0 2.0 212.1 Run 3 12/10/2009 14:28 18.1 2.0 210.9 Run 3 12/10/2009 14:29 18.1 2.0 209.2 Run 3 12/10/2009 14:29 18.1 2.0 208.8 Run 3 12/10/2009 14:29 18.0 2.0 209.3 Run 3 12110/200914:30 18.1 2.0 210.6 Run 3 12/10/200914:30 18.1 2.0 211.1 Run 3 12/10/200914:30 18.1 2.0 211.9 Run 3 12/10/200914:31 18.1 2.0 212.5 Run 3 12/10/200914:31 18.1 2.0 211.8 Run 3 12/10/200914:31 18.1 2.0 211.6 Run 3 12/10/2009 14:32 18.1 2.0 211.9 Run 3 12/10/2009 14:32 18.1 2.0 211.7 Run 3 12/10/2009 14:32 18.1 2.0 210.4 Run 3 12/10/2009 14:33 18.1 2.0 210.5 Run 3 12/10/2009 14:33 18.0 2.0 211.7 Run 3 12/10/200914:33 18.0 2.0 212.6 Run 3 12/10/2009 14:34 18.0 2.0 213.5 Run 3 12/10/2009 14:34 18.0 2.0 214.2 Run 3 12/10/2009 14:34 18.1 2.0 212.5 Run 3 12/10/2009 14:35 18.0 2.0 210.9 Run 3 12/10/2009 14:35 18.0 2.0 211.4 Run 3 12/10/2009 14:35 18.0 2.0 212.0 Run 3 12/10/200914:36 18.0 2.0 212.9 Run 3 12/10/200914:36 18.0 2.0 214.0 Run 3 12/10/200914:36 18.0 2.0 215.4 Run 3 12/10/2009 14:37 18.0 2.0 215.9 Run 3 12/10/2009 14:37 18.1 2.0 216.5 Run 3 12/10/200914:37 18.0 2.0 217.2 Run 3 12/10/200914:38 18.1 2.0 217.5 Run 3 12/10/200914:38 18.1 2.0 217.1 Run 3 12/10/2009 14:38 18.0 2.0 215.2 Run 3 12/10/2009 14:39 18.0 2.0 212.3 Run 3 12/10/2009 14:39 18.0 2.0 209.5 Run 3 12/10/2009 14:39 18.0 2.0 209.1 Run 3 12/10/2009 14:40 18.0 2.0 210.4 Run 3 12/10/2009 14:40 18.0 2.0 211.9 Run 3 12/10/200914:40 18.1 2.0 212.6 Run 3 12/10/200914:41 18.0 2.0 212.5 Run 3 12/10/2009 14:41 18.1 2.0 213.3 Run 3 12/10/200914:41 18.1 2.0 212.9 Run 3 12/10/2009 14:42 18.1 2.0 212.2 Run 3 12/10/2009 14:42 18.0 2.0 210.4 Run 3 12/10/2009 14:42 18.0 2.0 209.4 Run 3 12/10/2009 14:43 18.1 2.0 208.8 Run 3 12/10/2009 14:43 18.0 2.0 208.5 Run 3 12/10/2009 14:43 18.1 2.0 209.8 Run 3 12/10/2009 14:44 18.1 2.0 210.7 Run 3 12/10/2009 14:44 18.1 2.0 211.2 Run 3 12/10/2009 14:44 18.1 2.0 212.3 Run 3 12/10/2009 14:45 18.1 2.0 211.8 Run 3 12/10/2009 14:45 18.1 1.9 209.1 Run 3 12/10/200914:45 18.1 2.0 208.1 Run 3 12/10/200914:46 18.1 1.9 208.0 Run 3 12/10/200914:46 18.1 1.9 206.5 Run 3 12/10/2009 14:46 18.1 1.9 206.2 Run 3 12/10/200914:47 18.1 1.9 207.2 Run 3 12/10/200914:47 18.1 1.9 207.6 Run 3 12/10/200914:47 18.1 2.0 208.3 Run 3 12/10/2009 14:48 18.0 2.0 209.3 Run 3 12/10/2009 14:48 18.0 2.0 209.1 Run 3 12/10/2009 14:48 18.1 2.0 208.4 Run 3 12/10/200914:49 18.1 2.0 207.9 Run 3
Page 13 of 15Cleveland Cliffs Natural Resources, Inc Reference Method Data Barr Engineering United Taconite, LLC Data Logger Output Sampled on 12/10/09 Forbes, Minnesota Line 2A WGS (SV048) TIMESTAMP 02_Avg C02_Avg S02_Avg TS Percent Percent PPM 12/10/2009 14:49 18.0 2.0 209.0 Run 3 12/10/2009 14:49 18.0 2.0 210.8 Run 3 12/10/2009 14:50 18.0 2.0 211.2 Run 3 12/10/2009 14:50 20.4 0.5 144.3 Port Change Run 3 12/10/2009 14:50 20.9 0.1 37.8 Port Change Run 3 12110/200914:51 20.9 0.1 12.5 Port Change Run 3 12/10/200914:51 20.4 0.5 11.3 Port Change Run 3 12/10/200914:51 18.1 1.9 113.9 Port Change Run 3 12/10/200914:52 18.0 2.0 187.7 Port Change Run 3 12/10/200914:52 18.0 2.0 205.5 Port Change Run 3 12/10/2009 14:52 18.0 2.0 209.6 Port Change Run 3 12/10/2009 14:53 18.0 2.0 211.4 Port Change Run 3 12/10/2009 14:53 18.0 2.0 213.9 Port Change Run 3 12/10/2009 14:53 18.0 2.0 215.6 Port Change Run 3 12/10/200914:54 18.0 2.0 217.6 Port Change Run 3 12/10/200914:54 18.0 2.0 220.0 Port Change Run 3 12/10/2009 14:54 18.0 2.0 220.6 Port Change Run 3 12/10/2009 14:55 18.0 2.0 221.0 Port Change Run 3 12/10/2009 14:55 18.0 2.0 220.9 Port Change Run 3 12/10/2009 14:55 18.1 2.0 220.3 Port Change Run 3 12/10/2009 14:56 18.0 2.0 217.9 Port Change Run 3 12/10/2009 14:56 18.1 2.0 217.9 Port Change Run 3 12/10/2009 14:56 18.1 2.0 218.0 Port Change Run 3 12/10/200914:57 18.1 2.0 217.7 Port Change Run 3 12/10/2009 14:57 18.1 1.9 217.4 Run 3 12/10/200914:57 18.1 1.9 215.3 Run 3 12/10/2009 14:58 18.1 1.9 212.2 Run 3 12/10/2009 14:58 18.1 2.0 210.2 Run 3 12/10/2009 14:58 18.1 2.0 209.1 Run 3 12/10/2009 14:59 18.1 2.0 208.1 Run 3 12/10/2009 14:59 18.1 2.0 209.1 Run 3 12/10/2009 14:59 18.0 2.0 210.2 Run 3 12/10/2009 15:00 18.1 2.0 210.6 Run 3 12/10/2009 15:00 18.1 2.0 211.4 Run 3 12/10/2009 15:00 18.0 2.0 213.4 Run 3 12/10/2009 15:01 18.0 2.0 216.2 Run 3 12/10/2009 15:01 18.0 2.0 218.1 Run 3 12/10/2009 15:01 18.1 2.0 218.1 Run 3 12/10/2009 15:02 18.1 1.9 217.7 Run 3 12/10/2009 15:02 18.1 2.0 218.1 Run 3 12/10/2009 15:02 18.1 2.0 219.8 Run 3 12/10/2009 15:03 18.1 1.9 219.7 Run 3 12/10/2009 15:03 18.1 2.0 218.0 Run 3 12/10/2009 15:03 18.1 1.9 216.9 Run 3 12/10/2009 15:04 18.1 1.9 216.5 Run 3 12/10/2009 15:04 18.1 1.9 217.5 Run 3 12/10/2009 15:04 18.1 1.9 220.2 Run 3 12/10/2009 15:05 18.1 1.9 221.7 Run 3 12/10/2009 15:05 18.1 1.9 221.7 Run 3 12/10/2009 15:05 18.1 1.9 220.9 Run 3 12/10/200915:06 18.1 1.9 219.3 Run 3 12/10/2009 15:06 18.1 1.9 217.2 Run 3 12/10/2009 15:06 18.1 1.9 215.3 Run 3 12/10/200915:07 18.1 2.0 214.3 Run 3 12/10/2009 15:07 18.1 1.9 213.9 Run 3 12/10/2009 15:07 18.1 2.0 212.9 Run 3 12/10/2009 15:08 18.0 2.0 211.4 Run 3 12/10/2009 15:08 18.1 2.0 211.3 Run 3 12/10/2009 15:08 18.1 2.0 211.1 Run 3 12/10/2009 15:09 18.0 2.0 211.3 Run 3 12/10/2009 15:09 18.0 2.0 212.4 Run 3 12/10/2009 15:09 18.0 2.0 214.0 Run 3 12/10/200915:10 18.1 2.0 213.7 Run 3 12/10/200915:10 18.1 2.0 212.0 Run 3 12/10/2009 15:10 18.0 2.0 210.6 Run 3 12/10/2009 15:11 18.0 2.0 210.6 Run 3 12/10/200915:11 18.1 2.0 211.5 Run 3 12/10/200915:11 18.0 2.0 212.0 Run 3 12/10/200915:12 18.0 2.0 212.0 Run 3 12/10/200915:12 18.1 2.0 211.7 Run 3 12/10/200915:12 18.1 1.9 210.9 Run 3 12/10/200915:13 18.1 1.9 208.4 Run 3 12/10/200915:13 18.1 2.0 207.5 Run 3
Page14of15Cleveland Cliffs Natural Resources. Inc Reference Method Data Barr Engineering United Taconite. LLC Data Logger Output Sampled on 12/10109 Forbes. Minnesota Line 2A WGS (SV048) TIMESTAMP 02_Avg C02_Avg S02_Avg TS Percent Percent PPM 12/10/200915:13 18.1 1.9 208.9 Run 3 12/10/200915:14 18.1 1.9 209.9 Run 3 12/10/2009 15:14 18.1 1.9 211.1 Run 3 12/10/200915:14 18.1 1.9 212.4 Run 3 12/10/200915:15 18.1 1.9 214.1 Run 3 12/10/2009 15:15 18.1 1.9 214.4 Run 3 12/10/200915:15 18.1 1.9 213.3 Run 3 12/10/200915:16 18.1 2.0 211.8 Run 3 12110/200915:16 18.0 2.0 211.8 Run 3 12/10/200915:16 18.0 2.0 212.0 Run 3 12/10/200915:17 18.1 2.0 210.7 Run 3 12110/200915:17 18.1 2.0 208.1 Run 3 12/10/200915:17 18.1 2.0 205.5 Run 3 12/10/2009 15:18 18.1 2.0 203.2 Run 3 12/10/200915:18 18.1 1.9 201.4 Run 3 12/10/200915:18 18.1 1.9 199.9 End Run 3 12/10/200915:19 18.1 2.0 199.2 12/10/200915:19 18.1 2.0 198.2 12/10/200915:19 18.1 1.9 197.0 12/10/2009 15:20 18.1 1.9 195.8 Drift Check 12/10/2009 15:20 18.1 1.9 194.5 Drift Check 12/10/2009 15:20 18.1 2.0 194.6 Drift Check 12/10/2009 15:21 18.1 2.0 196.3 Drift Check 12/10/200915:21 19.4 3.1 132.1 Drift Check 12/10/200915:21 19.8 3.6 46.6 Drift Check 12/10/2009 15:22 20.0 3.9 16.5 Drift Check 12/10/2009 15:22 20.0 3.9 7.5 Drift Check 12/10/2009 15:22 20.0 3.9 5.1 Drift Check 12/10/2009 15:23 20.0 3.9 4.3 Drift Check 12/10/2009 15:23 

### 20.0 3.9 3.7 0220.0. C02 4.0 Drift Check 12/10/2009 15:23 19.2 3.1 29.3 Drift Check 12/10/2009 15:24 19.9 3.9 51.5 Drift Check 12/10/2009 15:24 6.6 1.4 13.0 Drift Check 12/10/2009 15:24 0.3 0.1 5.5 Drift Check 12/10/2009 15:25 0.2 0.1 3.6 Drift Check 12/10/2009 15:25 0.2 0.1 3.0 Drift Check 12/10/2009 15:25 0.2 0.0 2.9 Drift Check 12/10/2009 15:26 0.2 0.0 2.7 Drift Check 12/10/2009 15:26 0.1 0.0 2.6 Drift Check 12/10/2009 15:26 

### 0.1 0.0 2.4 02. C02. S02 Zero Drift Check 12/10/2009 15:27 0.1 0.0 2.3 Drift Check 12/10/2009 15:27 6.7 0.0 2.1 Drift Check 12/10/2009 15:27 0.5 0.0 2.0 Drift Check 12/10/2009 15:28 0.1 0.0 98.0 Drift Check 12/10/2009 15:28 0.1 0.0 220.6 Drift Check 12/10/2009 15:28 0.1 0.0 248.8 Drift Check 12/10/2009 15:29 0.1 0.0 255.2 Drift Check 12/10/2009 15:29 0.1 0.0 258.4 Drift Check 12/10/2009 15:29 0.1 0.0 258.8 Drift Check 12/10/2009 15:30 0.1 0.0 259.4 Drift Check 12/10/2009 15:30 0.1 0.0 259.8 Drift Check 12/10/2009 15:30 0.1 0.0 259.9 Drift Check 12/10/2009 15:31 0.1 0.0 261.3 Drift Check 12/10/200915:31 0.1 0.0 261.1 Drift Check 12/10/200915:31 0.1 0.0 261.4 261.9 S02 Drift Check

Page 15 of 15Cliffs Natural Resources Inc Reference Method Data Barr Engineering United Taconite Data Logger Output Sampled on 12-8-09 Forbes, Minnesota Line 2B WGS (SV049) TIMESTAMP 02_Avg C02_Avg S02_Avg TS Percent Percent PPM 12/8/2009 7:09 0.0 0.0 0.6 Analyzer Cal 12/8/2009 7:09 0.0 0.0 0.6 Analyzer Cal 12/8/20097:10 0.0 0.0 0.6 Analyzer Cal 12/8/20097:10 0.0 0.0 0.5 Analyzer Cal 12/8/20097:10 0.0 0.0 0.5 Analyzer Cal 12/8/20097:11 0.0 0.0 0.5 Analyzer Cal 12/8/20097:11 0.0 0.0 0.5 Analyzer Cal 12/8/20097:11 0.0 0.0 0.3 Analyzer Cal 12/8/20097:12 

### 0.0 0.0 0.1 02, C02, S02 Zero Analyzer Cal 12/8/20097:12 0.0 0.0 0.4 Analyzer Cal 12/8/20097:12 0.0 0.0 0.4 Analyzer Cal 12/8/20097:13 0.0 0.0 0.3 Analyzer Cal 12/8/20097:13 12.0 0.0 0.1 Analyzer Cal 12/8/20097:13 18.2 2.7 -0.5 Analyzer Cal 12/8/20097:14 19.9 4.0 -0.9 Analyzer Cal 12/8/20097:14 19.9 4.0 -0.9 Analyzer Cal 12/8/20097:14 

### 20.0 4.0 -0.9 02 20.0, C02 4.0 Analyzer Cal 12/8/2009 7:15 20.0 4.0 -0.9 Analyzer Cal 12/8/20097:15 20.4 2.6 -0.9 Analyzer Cal 12/8/20097:15 14.5 4.5 -0.9 Analyzer Cal 12/8/20097:16 9.0 8.9 -0.8 Analyzer Cal 12/8/20097:16 9.0 8.9 -0.8 Analyzer Cal 12/8/20097:16 

### 9.0 8.9 -0.8 02 9.0, C02 9.0 Analyzer Cal 12/8/20097:17 13.9 3.8 -0.8 Analyzer Cal 12/8/20097:17 0.1 0.1 -0.8 Analyzer Cal 12/8/20097:17 0.0 0.1 -0.6 Analyzer Cal 12/8/20097:18 0.0 0.1 -0.3 Analyzer Cal 12/8/20097:18 0.0 0.0 0.0 Analyzer Cal 12/8/20097:18 0.0 0.0 0.1 Analyzer Cal 12/8/20097:19 0.0 0.0 0.1 Analyzer Cal 12/8/20097:19 0.0 0.0 0.3 Analyzer Cal 12/8/20097:19 3.1 0.0 0.4 Analyzer Cal 12/8/2009 7:20 16.3 0.1 6.1 Analyzer Cal 12/8/2009 7:20 0.2 0.0 139.0 Analyzer Cal 12/8/2009 7:20 0.0 0.0 228.3 Analyzer Cal 12/8/2009 7:21 0.0 0.0 252.0 Analyzer Cal 12/8/2009 7:21 0.0 0.0 257.1 Analyzer Cal 12/8/2009 7:21 0.0 0.0 257.5 Analyzer Cal 12/8/2009 7:22 0.0 0.0 260.0 Analyzer Cal 12/8/2009 7:22 0.0 0.0 261.2 Analyzer Cal 12/8/20097:22 0.0 0.0 

### 261.8 S02261.9 Analyzer Cal 12/8/20097:23 2.0 0.0 255.6 Analyzer Cal 12/8/20097:23 11.7 0.1 115.1 Analyzer Cal 12/8/2009 7:23 0.0 0.0 75.5 Analyzer Cal 12/8/2009 7:24 0.0 0.0 86.4 Analyzer Cal 12/8/20097:24 0.0 0.0 91.5 Analyzer Cal 12/8/2009 7:24 0.0 0.0 92.7 Analyzer Cal 12/8/20097:25 0.0 0.0 92.8 Analyzer Cal 12/8/2009 7:25 0.0 0.0 93.6 Analyzer Cal 12/8/2009 7:25 0.0 0.0 

### 93.9 S0293.9 Analyzer Cal 12/8/2009 7:26 0.0 0.0 93.6 Analyzer Cal 12/8/2009 7:26 0.0 0.0 93.8 Analyzer Cal 12/8/2009 7:26 1.1 0.0 92.4 Analyzer Cal 12/8/2009 7:27 12.2 0.1 44.6 Analyzer Cal 12/8/2009 7:27 0.0 0.0 11.3 Analyzer Cal 12/8/20097:27 0.0 0.0 2.2 Analyzer Cal 12/8/2009 7:28 0.0 0.0 0.7 Analyzer Cal 12/8/2009 7:28 3.4 0.0 0.4 12/8/2009 7:28 20.7 0.1 -0.3 12/8/2009 7:29 20.9 0.1 -0.3 12/8/2009 7:29 20.6 0.1 -0.3 12/8/2009 7:29 7.8 0.1 0.2 12/8/2009 7:30 0.5 0.0 0.1 12/8/2009 7:30 0.2 0.0 0.1 12/8/2009 7:30 0.2 0.0 0.3 12/8/2009 7:31 0.2 0.0 0.4 12/8/20097:31 0.1 0.0 0.3 12/8/20097:31 0.1 0.0 0.4 System Bias 12/8/2009 7:32 0.1 0.0 0.4 System Bias 12/8/20097:32 0.1 0.0 0.4 System Bias 12/8/2009 7:32 0.1 0.0 0.4 System Bias 12/8/2009 7:33 

### 0.1 0.0 0.4 02, C02 Zero System Bias 12/8/2009 7:33 0.1 0.0 0.4 System Bias
Page 1 of 21Cliffs Natural Resources Inc Reference Method Data Barr Engineering United Taconite Data Logger Output Sampled on 12-8-09 Forbes, Minnesota Line 2B WGS (SV049) TIMESTAMP 02_Avg C02_Avg S02_Avg TS Percent Percent PPM 12/8/2009 7:33 0.1 0.0 0.4 System Bias 12/8/2009 7:34 0.1 0.0 0.4 System Bias 12/8/2009 7:34 0.1 0.0 0.4 System Bias 12/8/2009 7:34 1.3 0.0 0.4 System Bias 12/8/2009 7:35 11.3 0.3 0.1 System Bias 12/8/2009 7:35 18.3 3.5 -0.3 System Bias 12/8/2009 7:35 19.9 3.9 -0.4 System Bias 12/8/2009 7:36 19.9 4.0 -0.5 System Bias 12/8/2009 7:36 20.0 4.0 -0.5 System Bias 12/8/2009 7:36 

### 20.0 4.0 -0.5 0220.0, C02 4.0 System Bias 12/8/2009 7:37 20.0 4.0 -0.5 System Bias 12/8/2009 7:37 20.0 4.0 -0.5 System Bias 12/8/2009 7:37 20.0 4.0 -0.5 System Bias 12/8/2009 7:38 20.0 4.0 -0.5 System Bias 12/8/2009 7:38 20.1 3.4 -0.5 System Bias 12/8/2009 7:38 13.4 1.9 -0.5 System Bias 12/8/2009 7:39 0.6 0.2 -0.4 System Bias 12/8/2009 7:39 0.2 0.1 -0.3 System Bias 12/8/2009 7:39 0.2 0.1 0.0 System Bias 12/8/2009 7:40 0.1 0.1 0.3 System Bias 12/8/2009 7:40 0.1 0.1 0.3 System Bias 12/8/2009 7:40 0.1 0.1 0.4 System Bias 12/8/2009 7:41 0.1 0.1 0.4 System Bias 12/8/2009 7:41 0.1 0.1 0.4 12/8/2009 7:41 7.9 0.1 0.4 12/8/2009 7:42 1.2 0.1 16.4 12/8/2009 7:42 0.1 0.1 65.2 12/8/2009 7:42 0.1 0.1 81.0 12/8/2009 7:43 0.1 0.1 85.7 12/8/2009 7:43 0.1 0.1 87.2 12/8/2009 7:43 0.1 0.1 87.9 12/8/2009 7:44 0.0 0.1 89.0 12/8/2009 7:44 0.0 0.1 89.5 12/8/2009 7:44 0.0 0.1 89.9 12/8/2009 7:45 0.0 0.1 90.2 12/8/2009 7:45 12.7 0.1 77.0 12/8/2009 7:45 20.8 0.1 24.7 12/8/2009 7:46 20.9 0.1 8.2 12/8/2009 7:46 20.9 0.1 4.2 12/8/2009 7:46 20.9 0.1 2.7 12/8/2009 7:47 20.9 0.1 2.1 12/8/2009 7:47 20.9 0.1 1.5 12/8/2009 7:47 20.9 0.1 1.1 12/8/2009 7:48 20.9 0.1 0.8 12/8/2009 7:48 14.9 0.1 3.3 12/8/20097:48 0.4 0.1 50.9 12/8/2009 7:49 0.1 0.1 80.7 12/8/2009 7:49 0.1 0.1 87.7 12/8/2009 7:49 0.1 0.1 89.7 12/8/2009 7:50 0.1 0.1 90.3 12/8/2009 7:50 0.1 0.1 90.6 12/8/2009 7:50 0.1 0.1 90.9 12/8/2009 7:51 0.1 0.1 91.2 121812009 7:51 5.7 0.1 89.1 12/8/20097:51 12.2 0.8 51.7 12/8/2009 7:52 19.4 3.9 29.7 12/8/2009 7:52 19.9 4.0 6.6 12/8/2009 7:52 20.5 1.9 2.6 12/8/2009 7:53 20.9 0.2 2.5 12/8/2009 7:53 20.9 0.2 2.5 12/8/2009 7:53 20.9 0.3 2.0 12/8/2009 7:54 20.1 3.7 1.7 12/8/2009 7:54 20.0 4.0 0.9 12/8/2009 7:54 20.0 4.0 0.4 12/8/2009 7:55 20.0 4.0 0.2 12/8/2009 7:55 20.0 4.1 0.2 12/8/2009 7:55 20.6 1.3 0.1 12/8/2009 7:56 21.0 0.2 0.2 12/8/2009 7:56 21.0 0.2 0.4 12/8/2009 7:56 21.0 0.2 0.4 12/8/2009 7:57 21.0 0.2 0.5 12/8/2009 7:57 21.0 0.2 0.4 12/8/2009 7:57 21.0 0.1 0.3
Page 2 of 21Cliffs Natural Resources Inc Reference Method Data Barr Engineering United Taconite Data Logger Output Sampled on 12-8-09 Forbes, Minnesota Line 2B WGS (SV049) TIMESTAMP 02_Avg C02_Avg S02_Avg TS Percent Percent PPM 1218/2009 7:58 21.0 0.1 0.3 12/8/2009 7:58 19.9 0.9 11.3 12/8/2009 7:58 18.5 1.7 98.9 12/8/2009 7:59 18.5 1.7 135.7 12/8/2009 7:59 18.5 1.7 139.8 12/8/2009 7:59 18.4 1.7 137.9 12/8/2009 8:00 18.4 1.7 137.0 12/8/2009 8:00 18.4 1.7 137.3 12/8/2009 8:00 18.4 1.7 137.2 12/8/2009 8:01 18.4 1.7 138.7 12/8/2009 8:01 18.4 1.7 140.0 12/8/2009 8:01 18.4 1.7 141.1 12/8/2009 8:02 18.4 1.7 142.3 12/8/2009 8:02 18.4 1.7 142.1 12/8/2009 8:02 18.4 1.7 140.8 12/8/2009 8:03 18.4 1.7 140.2 12/8/2009 8:03 18.4 1.7 140.1 12/8/2009 8:03 18.4 1.7 139.6 12/8/2009 8:04 18.9 2.6 131.3 12/8/2009 8:04 20.0 4.1 38.9 12/8/2009 8:04 19.0 2.3 36.2 12/8/2009 8:05 3.3 0.4 59.6 12/8/2009 8:05 0.0 0.1 13.6 12/8/2009 8:05 0.0 0.1 3.0 12/8/2009 8:06 0.0 0.1 1.5 12/8/20098:06 0.0 0.1 1.1 12/8/2009 8:06 0.0 0.1 0.7 12/8/2009 8:07 0.0 0.1 0.7 12/8/2009 8:07 0.0 0.1 0.7 12/8/2009 8:07 10.6 1.1 3.2 Analyzer Cal 12/8/2009 8:08 11.0 0.9 12.2 Analyzer Cal 12/8/2009 8:08 0.0 0.1 34.7 Analyzer Cal 12/8/2009 8:08 0.0 0.1 45.4 Analyzer Cal 12/8/2009 8:09 0.0 0.1 47.4 Analyzer Cal 12/8/2009 8:09 0.0 0.1 47.7 Analyzer Cal 12/8/2009 8:09 0.0 0.1 47.8 Analyzer Cal 12/8/2009 8:10 0.0 0.1 307.5 Analyzer Cal 12/8/2009 8:10 0.0 0.1 470.8 Analyzer Cal 12/8/2009 8:10 0.0 0.1 473.0 Analyzer Cal 12/8/20098:11 0.0 0.1 478.0 Analyzer Cal 12/8/20098:11 0.0 0.1 477.6 Analyzer Cal 12/8/20098:11 0.0 0.1 477.8 S02479 Analyzer Cal 12/8/20098:12 0.0 0.1 477.4 Analyzer Cal 12/8/20098:12 2.6 0.4 475.3 Analyzer Cal 12/8/20098:12 11.2 1.0 293.8 Analyzer Cal 12/8/20098:13 0.0 0.1 248.7 Analyzer Cal 12/8/20098:13 0.0 0.1 262.3 Analyzer Cal 12/8/20098:13 0.0 0.1 265.2 Analyzer Cal 12/8/2009 8:14 0.0 0.1 

### 265.9 S02261.9 Analyzer Cal 12/8/2009 8:14 0.0 0.1 266.6 Analyzer Cal 12/8/20098:14 0.0 0.1 266.7 Analyzer Cal 12/8/20098:15 0.0 0.1 266.0 Analyzer Cal 12/8/20098:15 0.0 0.1 266.9 Analyzer Cal 12/8/20098:15 0.0 0.1 266.2 Analyzer Cal 12/8/20098:16 0.0 0.1 265.9 Analyzer Cal 12/8/20098:16 4.0 0.5 263.0 Analyzer Cal 12/8/2009 8:16 5.9 0.5 164.4 Analyzer Cal 12/8/20098:17 0.0 0.1 37.5 Analyzer Cal 12/8/2009 8:17 0.0 0.1 7.6 Analyzer Cal 12/8/2009 8:17 0.0 0.1 2.4 Analyzer Cal 12/8/2009 8:18 4.4 0.5 4.6 Analyzer Cal 12/8/2009 8:18 10.6 0.9 

### 77.4 Analyzer Cal 12/8/20098:18 0.7 0.2 90.5 Analyzer Cal 12/8/20098:19 5.1 0.6 98.2 Analyzer Cal 12/8/2009 8:19 6.9 0.7 107.2 Analyzer Cal 12/8/2009 8: 19 8.0 0.8 111.3 Analyzer Cal 12/8/2009 8:20 8.8 0.9 113.3 Analyzer Cal 12/8/2009 8:20 0.6 0.1 106.7 Analyzer Cal 12/8/2009 8:20 0.0 0.1 98.0 Analyzer Cal 12/8/20098:21 0.0 0.1 95.9 Analyzer Cal 12/8/2009 8:21 0.0 0.1 96.3 Analyzer Cal 12/8/2009 8:21 0.0 0.1 

### 96.2 S0296.3 Analyzer Cal 12/8/2009 8:22 0.0 0.1 95.9 Analyzer Cal
Page 3 of 21Cliffs Natural Resources Inc Reference Method Data Barr Engineering United Taconite Data Logger Output Sampled on 12-8-09 Forbes, Minnesota Line 2B WGS (SV049) TIMESTAMP 02_Avg C02_Avg S02_Avg TS Percent Percent PPM 12/8/2009 8:22 11.9 1.2 103.4 12/8/2009 8:22 18.5 1.7 125.6 12/8/2009 8:23 18.7 2.1 121.3 1218/2009 8:23 5.2 0.9 92.9 1218/2009 8:23 0.1 0.1 44.8 12/8/2009 8:24 0.1 0.1 20.7 12/8/2009 8:24 0.1 0.1 12.8 12/8/2009 8:24 0.1 0.1 10.0 12/8/2009 8:25 0.1 0.1 8.0 12/8/2009 8:25 0.1 0.0 6.6 12/8/2009 8:25 0.1 0.0 5.8 12/8/2009 8:26 0.1 0.0 5.2 12/8/2009 8:26 0.0 0.0 4.7 12/8/2009 8:26 0.0 0.0 4.6 12/8/20098:27 0.0 0.0 4.4 12/8/2009 8:27 0.0 0.0 4.2 12/8/2009 8:27 0.0 0.0 4.0 12/8/2009 8:28 0.0 0.0 3.8 12/8/2009 8:28 0.0 0.0 3.7 12/8/2009 8:28 0.0 0.0 4.0 12/8/2009 8:29 0.0 0.0 3.7 12/8/2009 8:29 0.0 0.0 3.4 System Bias 12/8/2009 8:29 0.0 0.0 3.2 System Bias 12/8/2009 8:30 0.0 0.0 3.0 System Bias 12/8/2009 8:30 0.0 0.0 3.0 System Bias 12/8/2009 8:30 0.0 0.0 3.0 System Bias 12/8/2009 8:31 8.2 0.8 4.3 System Bias 12/8/2009 8:31 6.7 0.6 48.2 System Bias 12/8/20098:31 0.1 0.0 113.4 System Bias 12/8/2009 8:32 0.1 0.0 207.3 System Bias 12/8/2009 8:32 0.0 0.0 239.8 System Bias 12/8/2009 8:32 0.0 0.0 248.8 System Bias 1218/2009 8:33 0.0 0.0 251.9 System Bias 12/8/2009 8:33 0.0 0.0 253.9 System Bias 12/8/2009 8:33 0.0 0.0 254.9 System Bias 12/8/2009 8:34 0.0 0.0 255.4 System Bias 12/8/2009 8:34 0.0 0.0 255.6 System Bias 12/8/2009 8:34 0.0 0.0 254.7 System Bias 12/8/2009 8:35 0.0 0.0 255.8 System Bias 12/8/2009 8:35 0.0 0.0 255.7 System Bias 1218/2009 8:35 0.3 0.0 256.5 System Bias 1218/2009 8:36 15.7 1.4 250.8 System Bias 12/8/2009 8:36 18.3 1.6 196.1 System Bias 12/8/2009 8:36 18.3 1.6 168.9 12/8/2009 8:37 18.4 1.6 160.7 12/8/2009 8:37 18.4 1.6 155.6 12/8/2009 8:37 18.4 1.7 153.5 12/8/2009 8:38 18.4 1.7 152.8 12/8/2009 8:38 18.4 1.7 152.6 12/8/2009 8:38 18.4 1.7 152.9 12/8/2009 8:39 18.3 1.7 153.6 12/8/2009 8:39 18.3 1.7 154.4 12/8/2009 8:39 18.3 1.7 154.7 12/8/2009 8:40 18.3 1.7 154.7 12/8/2009 8:40 18.3 1.7 154.6 12/8/2009 8:40 18.3 1.7 153.4 12/8/2009 8:41 18.3 1.7 151.7 1218/2009 8:41 5.5 0.5 132.0 12/8/2009 8:41 0.0 0.0 36.4 12/8/2009 8:42 0.0 0.0 7.6 12/8/2009 8:42 0.0 0.0 2.8 12/8/2009 8:42 2.5 0.3 2.5 12/8/2009 8:43 13.8 1.2 79.0 12/8/2009 8:43 0.1 0.0 294.6 12/8/2009 8:43 0.0 0.0 443.6 12/8/2009 8:44 0.0 0.0 473.3 12/8/2009 8:44 0.0 0.0 477.0 12/8/2009 8:44 0.0 0.0 478.2 12/8/2009 8:45 0.0 0.0 478.2 12/8/2009 8:45 0.0 0.0 478.0 12/8/2009 8:45 0.0 0.0 478.8 12/8/2009 8:46 0.0 0.0 479.3 12/8/2009 8:46 11.6 1.0 379.0
Page 4 of21Cliffs Natural Resources Inc Reference Method Data Barr Engineering United Taconite Data Logger Output Sampled on 12-8-09 Forbes, Minnesota Line 2B WGS (SV049) TIMESTAMP 02_Avg C02_Avg S02_Avg TS Percent Percent PPM 

### 12/8/2009 8:46 0.1 0.0 128.2 

### 12/8/2009 8:47 0.0 0.0 24.0 

### 12/8/2009 8:47 0.0 0.0 5.2 

### 12/8/2009 8:47 0.0 0.0 2.2 

### 12/8/2009 8:48 0.0 0.0 1.5 

### 12/8/2009 8:48 0.0 0.0 1.4 

### 12/8/2009 8:48 0.0 0.0 1.3 

### 12/8/2009 8:49 0.0 0.0 1.1 

### 12/8/2009 8:49 0.0 0.0 1.1 

### 12/8/2009 8:49 0.0 0.0 1.1 

### 12/8/2009 8:50 10.4 1.0 28.2 

### 12/8/2009 8:50 3.1 0.2 206.2 

### 12/8/2009 8:50 0.0 0.0 422.7 

### 12/8/2009 8:51 0.0 0.0 469.4 Analyzer cal check 

### 12/8/2009 8:51 0.0 0.0 476.1 Analyzer cal check 

### 12/8/20098:51 0.0 0.0 478.0 Analyzer cal check 

### 12/8/2009 8:52 0.0 0.0 478.3 Analyzer cal check 

### 12/8/2009 8:52 0.0 0.0 478.6 Analyzer cal check 

### 12/8/2009 8:52 1.9 0.2 477.9 Analyzer cal check 

### 12/8/20098:53 8.5 0.7 323.3 Analyzer cal check 

### 12/8/2009 8:53 0.0 0.0 265.3 Analyzer cal check 

### 12/8/2009 8:53 0.0 0.0 266.6 Analyzer cal check 

### 12/8/2009 8:54 0.0 0.0 265.9 Analyzer cal check 

### 12/8/2009 8:54 0.0 0.0 267.1 Analyzer cal check 

### 12/8/2009 8:54 10.2 1.0 245.7 Analyzer cal check 

### 12/8/2009 8:55 1.5 0.0 120.8 

### 12/8/2009 8:55 0.0 0.0 24.1 

### 12/8/2009 8:55 0.0 0.0 5.1 

### 12/8/2009 8:56 0.0 0.0 2.1 

### 12/8/2009 9:48 8.3 0.7 130.6 System Bias 

### 12/8/2009 9:48 0.2 0.1 169.7 System Bias 

### 12/8/2009 9:49 0.1 0.1 225.4 System Bias 

### 12/8/2009 9:49 0.1 0.0 247.2 System Bias 

### 12/8/2009 9:49 0.1 0.0 254.2 System Bias 

### 12/8/2009 9:50 0.1 0.0 257.0 System Bias 

### 12/8/2009 9:50 0.0 0.0 258.5 System Bias 

### 12/8/2009 9:50 0.0 0.0 259.2 System Bias 

### 12/8/2009 9:51 0.0 0.0 260.6 System Bias 

### 12/8/2009 9:51 0.0 0.0 261.4 System Bias 

### 12/8/2009 9:51 0.0 0.0 261.0 System Bias 

### 12/8/2009 9:52 0.0 0.0 261.3 System Bias 

### 12/8/2009 9:52 0.4 0.1 261.9 System Bias 

### 12/8/2009 9:52 6.7 0.6 245.5 System Bias 

### 12/8/2009 9:53 0.1 0.1 169.2 System Bias 

### 12/8/2009 9:53 0.0 0.0 70.8 System Bias 

### 12/8/2009 9:53 0.0 0.0 35.6 System Bias 

### 12/8/2009 9:54 0.0 0.0 23.0 System Bias 

### 12/8/2009 9:54 0.0 0.0 17.1 System Bias 

### 12/8/2009 9:54 0.0 0.0 13.9 System Bias 

### 12/8/2009 9:55 0.0 0.0 11.5 System Bias 

### 12/8/2009 9:55 0.0 0.0 9.7 System Bias 

### 12/8/2009 9:55 0.0 0.0 8.8 System Bias 

### 12/8/2009 9:56 0.0 0.0 7.6 System Bias 

### 121812009 9:56 0.0 0.0 6.9 System Bias 

### 12/8/2009 9:56 0.0 0.0 6.3 System Bias 

### 12/8/2009 9:57 0.0 0.0 6.0 System Bias 

### 12/8/2009 9:57 0.0 0.0 5.4 System Bias 

### 12/8/2009 9:57 0.0 0.0 5.2 System Bias 

### 12/8/2009 9:58 0.0 0.0 4.8 System Bias 

### 12/8/2009 9:58 0.0 0.0 4.5 System Bias 

### 12/8/2009 9:58 0.0 0.0 4.2 System Bias 

### 12/8/2009 9:59 0.0 0.0 4.1 System Bias 

### 12/8/2009 9:59 0.7 0.1 3.9 System Bias 

### 12/8/2009 9:59 8.5 0.8 18.5 System Bias 

### 12/8/2009 10:00 0.1 0.0 86.1 System Bias 

### 12/8/2009 10:00 0.0 0.0 190.4 System Bias 

### 12/8/2009 10:00 0.0 0.0 230.9 System Bias 

### 12/8/2009 10:01 0.0 0.0 240.8 System Bias 

### 12/8/2009 10:01 0.0 0.0 244.5 System Bias 

### 12/8/2009 10:01 0.0 0.0 247.2 System Bias 

### 12/8/2009 10:02 0.0 0.0 249.9 System Bias 

### 12/8/2009 10:02 0.0 0.0 251.7 System Bias 

### 12/8/2009 10:02 0.0 0.0 253.9 System Bias
Page 5 of 21Cliffs Natural Resources Inc Reference Method Data Barr Engineering United Taconite Data Logger Output Sampled on 12-8-09 Forbes, Minnesota Line 2B WGS (SV049) TIMESTAMP 02_Avg C02_Avg S02_Avg TS Percent Percent PPM 

### 12/8/2009 10:03 0.0 0.0 

### 255.2 261.9 S02 System Bias 

### 12/8/2009 10:03 0.1 0.0 256.7 System Bias 

### 12/8/2009 10:03 7.6 0.7 257.9 System Bias 

### 12/8/2009 10:04 0.2 0.0 191.0 System Bias 

### 12/8/2009 10:04 0.0 0.0 77.5 System Bias 

### 12/8/2009 10:04 0.0 0.0 36.9 System Bias 

### 12/8/2009 10:05 0.0 0.0 22.4 System Bias 

### 12/8/2009 10:05 0.0 0.0 16.1 System Bias 

### 12/8/2009 10:05 0.0 0.0 12.8 System Bias 

### 121812009 10:06 0.0 0.0 10.6 System Bias 

### 12/8/2009 10:06 0.0 0.0 8.8 System Bias 

### 12/8/2009 10:06 0.0 0.0 7.6 System Bias 

### 12/8/2009 10:07 0.0 0.0 6.9 System Bias 

### 12/8/2009 10:07 0.0 0.0 6.2 System Bias 

### 12/8/2009 10:07 0.0 0.0 6.0 System Bias 

### 12/8/2009 10:08 0.0 0.0 5.5 System Bias 

### 12/8/2009 10:08 0.0 0.0 5.2 System Bias 

### 12/8/2009 10:08 0.0 0.0 4.8 System Bias 

### 12/8/2009 10:09 0.0 0.0 4.2 System Bias 

### 12/8/2009 10:09 0.0 0.0 4.3 System Bias 

### 12/8/2009 10:09 0.0 0.0 4.2 System Bias 

### 12/8/200910:10 0.0 0.0 4.2 System Bias 

### 12/8/200910:10 0.0 0.0 

### 4.1 S02 Zero System Bias 

### 12/8/200910:10 9.1 0.9 7.4 

### 12/8/200910:11 18.3 1.6 65.4 

### 12/8/200910:11 18.4 1.6 109.5 In Stack 

### 12/8/200910:11 18.4 1.6 126.6 In Stack 

### 12/8/200910:12 18.4 1.6 134.4 In Stack 

### 12/8/200910:12 18.4 1.6 137.9 In Stack 

### 12/8/200910:12 18.4 1.6 141.1 In Stack 

### 12/8/200910:13 18.4 1.6 142.4 In Stack 

### 12/8/200910:13 18.4 1.6 145.1 In Stack 

### 12/8/200910:13 18.4 1.6 146.1 In Stack 

### 12/8/200910:14 18.4 1.6 147.2 In Stack 

### 12/8/200910:14 18.4 1.6 147.6 In Stack 

### 12/8/200910:14 18.4 1.6 147.8 In Stack 

### 12/8/200910:15 18.4 1.6 148.8 In Stack 

### 12/8/200910:15 18.4 1.6 150.3 In Stack 

### 12/8/2009 10:15 18.4 1.6 150.2 In Stack 

### 12/8/200910:16 18.4 1.6 149.8 In Stack 

### 12/8/200910:16 18.4 1.6 149.4 In Stack 

### 12/8/200910:16 18.4 1.6 148.5 In Stack 

### 12/8/2009 10:17 18.4 1.6 148.6 In Stack 

### 12/8/200910:17 18.4 1.6 149.3 In Stack 

### 12/8/2009 10:17 18.4 1.6 150.7 In Stack 

### 12/8/200910:18 18.4 1.6 151.9 In Stack 

### 12/8/2009 10:18 18.4 1.6 152.0 In Stack 

### 12/8/2009 10:18 18.4 1.6 151.8 In Stack 

### 12/8/2009 10:19 18.4 1.6 152.3 In Stack 

### 12/8/200910:19 18.4 1.6 152.8 In Stack 

### 12/8/2009 10:19 18.4 1.6 153.2 In Stack 

### 12/8/2009 10:20 18.4 1.6 154.4 In Stack 

### 12/8/2009 10:20 18.4 1.6 157.2 In Stack 

### 12/8/2009 10:20 18.4 1.6 160.1 In Stack 

### 12/8/2009 10:21 18.4 1.6 162.2 In Stack 

### 12/8/2009 10:21 18.4 1.6 164.4 In Stack 

### 12/8/2009 10:21 18.4 1.6 166.5 In Stack 

### 12/8/2009 10:22 18.5 1.6 168.1 In Stack 

### 12/8/2009 10:22 18.5 1.6 169.7 In Stack 

### 12/8/2009 10:22 18.5 1.6 170.6 In Stack 

### 12/8/2009 10:23 18.5 1.6 169.3 In Stack 

### 12/8/2009 10:23 18.5 1.6 167.6 In Stack 

### 12/8/2009 10:23 18.5 1.6 165.8 In Stack 

### 12/8/2009 10:24 18.5 1.6 163.8 In Stack 

### 12/8/2009 10:24 18.5 1.6 161.8 In Stack 

### 12/8/2009 10:24 18.5 1.6 161.3 In Stack 

### 12/8/2009 10:25 18.4 1.6 160.4 In Stack 

### 12/8/2009 10:25 18.5 1.6 158.5 In Stack 

### 12/8/2009 10:25 18.5 1.6 157.8 In Stack 

### 12/8/2009 10:26 18.5 1.6 157.1 In Stack 

### 12/8/2009 10:26 18.5 1.6 155.7 In Stack 

### 12/8/2009 10:26 18.5 1.6 154.9 In Stack 

### 12/8/2009 10:27 18.5 1.6 153.8 In Stack
Page 6 of 21Cliffs Natural Resources Inc Reference Method Data Barr Engineering United Taconite Data Logger Output Sampled on 12-8-09 Forbes, Minnesota Line 2B WGS (SV049) TIMESTAMP 02_Avg C02_Avg S02_Avg TS Percent Percent PPM 

### 12/8/2009 10:27 18.5 1.6 152.0 In Stack 

### 12/8/2009 10:27 18.5 1.6 149.9 In Stack 

### 12/8/2009 10:28 18.5 1.6 147.8 In Stack 

### 12/8/2009 10:28 18.5 1.6 146.4 In Stack 

### 12/8/2009 10:28 18.4 1.6 145.2 In Stack 

### 12/8/2009 10:29 18.5 1.6 143.7 In Stack 

### 12/8/2009 10:29 18.5 1.6 142.7 In Stack 

### 12/8/2009 10:29 18.5 1.6 142.3 In Stack 

### 12/8/2009 10:30 18.5 1.6 142.1 In Stack 

### 12/8/2009 10:30 18.5 1.6 141.4 In Stack 

### 12/8/2009 10:30 18.5 1.6 140.2 In Stack 

### 12/8/200910:31 18.5 1.6 138.8 In Stack 

### 12/8/200910:31 18.5 1.6 137.8 In Stack 

### 12/8/200910:31 18.5 1.6 136.6 In Stack 

### 12/8/2009 10:32 18.5 1.6 135.1 In Stack 

### 12/8/2009 10:32 18.5 1.6 132.9 In Stack 

### 12/8/2009 10:32 18.5 1.6 130.5 In Stack 

### 12/8/2009 10:33 18.5 1.6 128.6 In Stack 

### 12/8/2009 10:33 18.5 1.6 126.7 In Stack 

### 12/8/2009 10:33 18.5 1.6 124.9 In Stack 

### 12/8/2009 10:34 18.5 1.6 123.5 In Stack 

### 12/8/2009 10:34 18.5 1.6 122.1 In Stack 

### 12/8/2009 10:34 18.5 1.6 120.8 In Stack 

### 12/8/2009 10:35 18.5 1.6 119.2 In Stack 

### 12/8/2009 10:35 18.5 1.6 117.4 In Stack 

### 12/8/2009 10:35 18.5 1.6 115.4 In Stack 

### 12/8/2009 10:36 18.5 1.6 113.0 In Stack 

### 12/8/2009 10:36 18.5 1.6 111.6 In Stack 

### 12/8/2009 10:36 18.5 1.6 111.0 In Stack 

### 12/8/2009 10:37 18.5 1.6 111.0 In Stack 

### 12/8/2009 10:37 18.5 1.6 111.5 In Stack 

### 12/8/2009 10:37 18.5 1.6 112.4 In Stack 

### 12/8/2009 10:38 18.5 1.6 112.7 In Stack 

### 12/8/2009 10:38 18.5 1.6 112.9 In Stack 

### 12/8/2009 10:38 18.5 1.6 113.2 In Stack 

### 12/8/2009 10:39 18.5 1.6 113.7 In Stack 

### 12/8/2009 10:39 18.5 1.6 114.4 In Stack 

### 12/8/2009 10:39 18.5 1.6 114.6 In Stack 

### 12/8/2009 10:40 18.5 1.6 114.5 In Stack 

### 12/8/2009 10:40 18.5 1.6 114.8 In Stack 

### 12/8/2009 10:40 18.5 1.6 117.6 In Stack 

### 12/8/2009 10:41 18.5 1.6 120.9 In Stack 

### 12/8/2009 10:41 18.5 1.6 122.2 In Stack 

### 12/8/2009 10:41 18.5 1.6 123.1 In Stack 

### 12/8/2009 10:42 18.5 1.6 123.8 In Stack 

### 12/8/2009 10:42 18.5 1.6 124.8 In Stack 

### 12/8/2009 10:42 18.5 1.6 125.4 In Stack 

### 12/8/2009 10:43 18.5 1.6 126.1 Point A Run 1 

### 12/8/2009 10:43 18.5 1.6 126.4 Point A Run 1 

### 12/8/2009 10:43 18.5 1.6 125.1 Point A Run 1 

### 12/8/2009 10:44 18.5 1.6 123.7 Point A Run 1 

### 12/8/2009 10:44 18.5 1.6 122.9 Point A Run 1 

### 12/8/2009 10:44 18.5 1.6 121.9 Point A Run 1 

### 12/8/2009 10:45 18.5 1.6 121.0 Point A Run 1 

### 12/8/2009 10:45 18.5 1.6 120.7 Point A Run 1 

### 12/8/2009 10:45 18.5 1.6 120.2 Point A Run 1 

### 12/8/2009 10:46 18.4 1.6 119.6 Point A Run 1 

### 12/8/2009 10:46 18.4 1.6 119.9 Point A Run 1 

### 12/8/2009 10:46 18.4 1.6 120.3 Point A Run 1 

### 12/8/200910:47 18.4 1.6 120.9 Point A Run 1 

### 12/8/200910:47 18.4 1.6 121.1 Point A Run 1 

### 12/8/200910:47 18.4 1.6 121.2 Point A Run 1 

### 12/8/2009 10:48 18.4 1.6 121.0 Point A Run 1 

### 12/8/2009 10:48 18.4 1.6 121.2 Point A Run 1 

### 12/8/2009 10:48 18.4 1.6 121.5 Point A Run 1 

### 12/8/2009 10:49 18.4 1.7 121.9 Point A Run 1 

### 12/8/2009 10:49 18.4 1.7 122.4 Point A Run 1 

### 12/8/2009 10:49 18.4 1.7 123.8 Point A Run 1 

### 12/8/2009 10:50 18.4 1.6 126.0 Point A Run 1 

### 12/8/2009 10:50 18.4 1.7 128.2 Point A Run 1 

### 12/8/2009 10:50 18.4 1.7 130.3 Point A Run 1 

### 12/8/200910:51 18.4 1.7 132.7 Point A Run 1 

### 12/8/2009 10:51 18.4 1.7 135.7 Point A Run 1
Page 7 of 21Cliffs Natural Resources Inc Reference Method Data Barr Engineering United Taconite Data Logger Output Sampled on 12-8-09 Forbes, Minnesota Line 2B WGS (SV049) TIMESTAMP 02_Avg C02_Avg S02_Avg TS Percent Percent PPM 

### 12/8/200910:51 18.4 1.7 139.0 Point A Run 1 

### 1218/2009 10:52 18.4 1.7 141.1 Point A Run 1 

### 12/8/2009 10:52 18.4 1.7 142.1 Point A Run 1 

### 12/8/2009 10:52 18.4 1.7 143.0 Point A Run 1 

### 12/8/2009 10:53 18.4 1.7 144.2 Point A Run 1 

### 12/8/2009 10:53 18.4 1.7 145.0 Point A Run 1 

### 12/8/2009 10:53 18.4 1.7 144.8 Point A Run 1 

### 12/8/2009 10:54 18.4 1.7 144.6 Point A Run 1 

### 12/8/2009 10:54 18.4 1.7 144.2 Point A Run 1 

### 12/8/2009 10:54 18.4 1.7 143.8 Point A Run 1 

### 12/8/2009 10:55 18.4 1.7 142.8 Point A Run 1 

### 12/8/2009 10:55 18.4 1.7 141.8 Point A Run 1 

### 12/8/2009 10:55 18.4 1.7 141.0 Point A Run 1 

### 12/8/2009 10:56 18.3 1.7 140.5 Point A Run 1 

### 12/8/2009 10:56 18.3 1.7 140.9 Point A Run 1 

### 12/8/2009 10:56 18.3 1.7 141.1 Point A Run 1 

### 12/8/2009 10:57 18.3 1.7 141.4 Point A Run 1 

### 12/8/2009 10:57 18.3 1.7 141.2 Point A Run 1 

### 12/8/2009 10:57 18.4 1.7 141.1 Point A Run 1 

### 12/8/2009 10:58 18.3 1.7 140.0 Point A Run 1 

### 12/8/2009 10:58 18.4 1.7 139.8 Point A Run 1 

### 12/8/2009 10:58 18.4 1.7 140.6 Point A Run 1 

### 12/8/2009 10:59 18.4 1.7 140.7 Point A Run 1 

### 12/8/2009 10:59 18.4 1.7 140.5 Point A Run 1 

### 12/8/2009 10:59 18.4 1.7 139.3 Point A Run 1 

### 12/8/2009 11 :00 18.4 1.7 138.5 Point A Run 1 

### 12/8/2009 11 :00 18.4 1.7 138.9 Point A Run 1 

### 1218/2009 11 :00 18.4 1.7 138.8 Point A Run 1 

### 12/8/2009 11 :01 18.4 1.7 139.4 Point A Run 1 

### 12/8/2009 11 :01 18.4 1.7 140.6 Point A Run 1 

### 12/8/2009 11 :01 18.4 1.7 141.9 Point A Run 1 

### 12/8/2009 11 :02 18.4 1.7 142.6 Point A Run 1 

### 12/8/2009 11 :02 18.4 1.7 142.7 Point A Run 1 

### 12/8/2009 11 :02 18.4 1.7 143.1 Point A Run 1 

### 12/8/2009 11 :03 18.4 1.7 144.2 Point B Run 1 

### 12/8/2009 11 :03 18.4 1.7 145.4 Point B Run 1 

### 12/8/2009 11 :03 18.3 1.7 145.8 Point B Run 1 

### 12/8/2009 11 :04 18.3 1.7 146.8 Point B Run 1 

### 1218/2009 11 :04 18.4 1.7 148.4 Point B Run 1 

### 12/8/2009 11 :04 18.4 1.7 149.1 Point B Run 1 

### 12/8/2009 11 :05 18.4 1.7 148.9 Point B Run 1 

### 12/8/2009 11 :05 18.3 1.7 148.6 Point B Run 1 

### 12/8/2009 11 :05 18.3 1.7 148.8 Point B Run 1 

### 12/8/2009 11 :06 18.3 1.7 149.3 Point B Run 1 

### 12/8/2009 11 :06 18.3 1.7 149.6 Point B Run 1 

### 1218/2009 11 :06 18.3 1.7 148.1 Point B Run 1 

### 12/8/2009 11 :07 18.3 1.7 146.2 Point B Run 1 

### 12/8/2009 11 :07 18.3 1.7 145.1 Point B Run 1 

### 12/8/2009 11 :07 18.3 1.7 144.4 Point B Run 1 

### 12/8/2009 11 :08 18.3 1.7 144.0 Point B Run 1 

### 12/8/2009 11 :08 18.3 1.7 143.3 Point B Run 1 

### 12/8/2009 11 :08 18.3 1.7 142.7 Point B Run 1 

### 12/8/2009 11 :09 18.4 1.7 142.4 Point B Run 1 

### 12/8/2009 11 :09 18.3 1.7 141.5 Point B Run 1 

### 12/8/2009 11 :09 18.3 1.7 141.2 Point B Run 1 

### 12/8/2009 11:10 18.3 1.7 141.2 Point B Run 1 

### 12/8/2009 11:10 18.3 1.7 141.0 Point B Run 1 

### 12/8/2009 11:10 18.3 1.7 140.5 Point B Run 1 

### 12/8/200911 :11 18.3 1.7 140.3 Point B Run 1 

### 12/8/2009 11 :11 18.3 1.7 140.3 Point B Run 1 

### 12/8/2009 11 :11 18.3 1.7 141.2 Point B Run 1 

### 12/8/2009 11 :12 18.3 1.7 143.1 Point B Run 1 

### 12/8/2009 11 :12 18.3 1.7 144.5 Point B Run 1 

### 12/8/200911 :12 18.3 1.7 144.4 Point B Run 1 

### 12/8/2009 11 :13 18.3 1.7 144.0 Point B Run 1 

### 12/8/2009 11 :13 18.3 1.7 144.3 Point B Run 1 

### 12/8/200911:13 18.3 1.7 145.3 Point B Run 1 

### 12/8/200911 :14 18.3 1.7 146.6 Point B Run 1 

### 12/8/200911 :14 18.3 1.7 146.6 Point B Run 1 

### 12/8/200911 :14 18.3 1.7 146.4 Point B Run 1 

### 12/8/2009 11 :15 18.3 1.7 145.9 Point B Run 1 

### 12/8/2009 11 :15 18.3 1.7 145.9 Point B Run 1 

### 12/8/2009 11 :15 18.3 1.7 146.5 Point B Run 1
Page 8 of 21eliffs Natural Resources Inc Reference Method Data Barr Engineering United Taconite Data Logger Output Sampled on 12-8-09 Forbes, Minnesota Line 2B WGS (SV049) TIMESTAMP 02_Avg e02_Avg S02_Avg TS Percent Percent PPM 

### 12/8/2009 11 :16 18.3 1.7 146.7 Point B Run 1 

### 12/8/200911:16 18.3 1.7 146.2 Point B Run 1 

### 12/8/2009 11 :16 18.3 1.7 146.2 Point B Run 1 

### 12/8/2009 11 :17 18.3 1.7 145.7 Point B Run 1 

### 12/8/200911 :17 18.3 1.7 144.7 Point B Run 1 

### 12/8/2009 11 :17 18.3 1.7 144.5 Point B Run 1 

### 12/8/200911:18 18.3 1.7 144.5 Point B Run 1 

### 12/8/2009 11 :18 18.3 1.7 144.9 Point B Run 1 

### 12/8/2009 11 :18 18.3 1.7 145.1 Point B Run 1 

### 12/8/2009 11 :19 18.3 1.7 145.5 Point B Run 1 

### 12/8/2009 11 :19 18.3 1.7 145.7 Point B Run 1 

### 1218/2009 11 :19 18.3 1.7 145.1 Point B Run 1 

### 12/8/2009 11 :20 18.3 1.7 145.3 Point B Run 1 

### 12/8/2009 11 :20 18.3 1.7 146.1 Point B Run 1 

### 1218/2009 11 :20 18.3 1.7 146.9 Point B Run 1 

### 12/8/2009 11 :21 18.3 1.7 146.9 Point B Run 1 

### 12/8/2009 11 :21 18.3 1.7 147.0 Point B Run 1 

### 12/8/2009 11 :21 18.3 1.7 148.1 Point B Run 1 

### 12/8/2009 11 :22 18.3 1.7 149.4 Point B Run 1 

### 12/8/2009 11 :22 18.3 1.7 152.2 Point B Run 1 

### 12/8/2009 11 :22 18.3 1.7 154.5 Point B Run 1 

### 12/8/2009 11 :23 18.3 1.7 155.4 Point B Run 1 

### 12/8/2009 11 :23 18.3 1.7 155.8 Point B Run 1 

### 12/8/2009 11 :23 18.3 1.7 156.0 Point B Run 1 

### 12/8/2009 11 :24 18.3 1.7 156.2 Point B Run 1 

### 12/8/2009 11 :24 20.0 0.6 139.5 Run 1 

### 12/8/2009 11 :24 20.8 0.1 69.1 Run 1 

### 12/8/2009 11 :25 20.8 0.1 31.4 Run 1 

### 12/8/2009 11 :25 20.8 0.1 18.5 Run 1 

### 12/8/2009 11 :25 20.3 0.5 13.3 Run 1 

### 12/8/2009 11 :26 18.4 1.7 46.3 Run 1 

### 12/8/2009 11 :26 18.3 1.7 112.4 Run 1 

### 12/8/2009 11 :26 18.3 1.7 141.8 Run 1 

### 12/8/2009 11 :27 18.3 1.7 153.5 Run 1 

### 12/8/2009 11 :27 18.3 1.7 157.3 Run 1 

### 12/8/2009 11 :27 18.3 1.7 158.5 Run 1 

### 12/8/2009 11 :28 18.3 1.7 157.6 Run 1 

### 12/8/2009 11 :28 18.3 1.7 156.5 Run 1 

### 12/8/2009 11 :28 18.3 1.7 154.4 Run 1 

### 12/8/2009 11 :29 18.3 1.7 152.8 Point e Run 1 

### 12/8/2009 11 :29 18.3 1.7 152.8 Point e Run 1 

### 12/8/2009 11 :29 18.3 1.7 153.3 Point e Run 1 

### 12/8/2009 11 :30 18.3 1.7 153.4 Pointe Run 1 

### 12/8/2009 11 :30 18.3 1.7 153.5 Point e Run 1 

### 12/8/2009 11 :30 18.3 1.7 154.0 Point e Run 1 

### 12/8/2009 11 :31 18.3 1.7 154.5 Pointe Run 1 

### 12/8/2009 11 :31 18.3 1.7 153.7 Pointe Run 1 

### 12/8/200911 :31 18.4 1.7 152.2 Point e Run 1 

### 12/8/2009 11 :32 18.4 1.7 151.3 Point e Run 1 

### 12/8/2009 11 :32 18.4 1.7 151.3 Point e Run 1 

### 12/8/2009 11 :32 18.3 1.7 150.3 Point e Run 1 

### 12/8/2009 11 :33 18.3 1.7 150.0 Point e Run 1 

### 12/8/2009 11 :33 18.3 1.7 149.4 Point e Run 1 

### 12/8/2009 11 :33 18.3 1.7 148.1 Point e Run 1 

### 12/8/2009 11 :34 18.3 1.7 147.5 Point e Run 1 

### 12/8/2009 11 :34 18.3 1.7 147.0 Point e Run 1 

### 12/8/2009 11 :34 18.4 1.7 147.6 Pointe Run 1 

### 12/8/2009 11 :35 18.4 1.7 148.4 Pointe Run 1 

### 12/8/2009 11 :35 18.4 1.7 147.7 Point e Run 1 

### 12/8/2009 11 :35 18.3 1.7 147.4 Point e Run 1 

### 12/8/2009 11 :36 18.3 1.7 147.7 Point e Run 1 

### 12/8/2009 11 :36 18.3 1.7 147.9 Point e Run 1 

### 12/8/2009 11 :36 18.3 1.7 148.0 Point e Run 1 

### 12/8/2009 11 :37 18.3 1.7 148.3 Point e Run 1 

### 12/8/2009 11 :37 18.3 1.7 149.5 Point e Run 1 

### 12/8/2009 11 :37 18.3 1.7 149.3 Point e Run 1 

### 12/8/2009 11 :38 18.3 1.7 148.1 Pointe Run 1 

### 12/8/2009 11 :38 18.3 1.7 147.2 Pointe Run 1 

### 12/8/2009 11 :38 18.3 1.7 147.0 Point e Run 1 

### 12/8/2009 11 :39 18.3 1.7 147.0 Pointe Run 1 

### 12/8/2009 11 :39 18.3 1.7 146.8 Point e Run 1 

### 12/8/2009 11 :39 18.3 1.7 146.7 Point e Run 1 

### 12/8/2009 11 :40 18.3 1.7 146.9 Point e Run 1
Page 9 of 21Cliffs Natural Resources Inc Reference Method Data Barr Engineering United Taconite Data Logger Output Sampled on 12-8-09 Forbes, Minnesota Line 2B WGS (SV049) TIMESTAMP 02_Avg C02_Avg S02_Avg TS Percent Percent PPM 

### 12/8/2009 11 :40 18.3 1.7 146.8 Point C Run 1 

### 12/8/2009 11 :40 18.3 1.7 145.6 Point C Run 1 

### 12/8/200911 :41 18.3 1.7 144.0 PointC Run 1 

### 12/8/2009 11 :41 18.3 1.7 143.3 PointC Run 1 

### 12/8/2009 11 :41 18.3 1.7 142.5 PointC Run 1 

### 12/8/2009 11 :42 18.3 1.7 142.3 PointC Run 1 

### 12/8/2009 11 :42 18.3 1.7 142.9 Point C Run 1 

### 12/8/2009 11 :42 18.3 1.7 144.1 PointC Run 1 

### 12/8/2009 11 :43 18.3 1.7 145.7 Point C Run 1 

### 12/8/2009 11 :43 18.4 1.7 147.2 Point C Run 1 

### 12/8/2009 11 :43 18.4 1.7 147.8 Point C Run 1 

### 12/8/2009 11 :44 18.3 1.7 148.9 Point C Run 1 

### 12/8/2009 11 :44 18.3 1.7 150.6 Point C Run 1 

### 12/8/2009 11 :44 18.4 1.7 152.6 Point C Run 1 

### 12/8/2009 11 :45 18.4 1.7 153.3 Point C Run 1 

### 12/8/2009 11 :45 18.4 1.7 153.1 Point C Run 1 

### 12/8/2009 11 :45 18.4 1.7 152.4 PointC Run 1 

### 12/8/2009 11 :46 18.3 1.7 151.8 Point C Run 1 

### 12/8/2009 11 :46 18.3 1.7 152.4 Point C Run 1 

### 12/8/2009 11 :46 18.3 1.7 153.1 Point C Run 1 

### 1218/2009 11:47 18.3 1.7 153.1 Point C Run 1 

### 12/8/200911 :47 18.4 1.7 152.7 Point C Run 1 

### 12/8/2009 11 :47 18.4 1.7 152.2 Point C Run 1 

### 12/8/2009 11 :48 18.4 1.7 151.9 Point C Run 1 

### 12/8/2009 11 :48 18.4 1.7 152.3 Point C Run 1 

### 12/8/2009 11 :48 18.4 1.7 152.0 PointC Run 1 

### 12/8/2009 11 :49 18.3 1.7 151.7 PointC Run 1 

### 12/8/2009 11 :49 18.3 1.7 152.0 Point C Run 1 

### 12/8/2009 11 :49 18.3 1.7 151.7 PointC Run 1 

### 12/8/2009 11 :50 18.3 1.7 150.8 PointC Run 1 

### 12/8/2009 11 :50 18.3 1.7 149.1 Point C Run 1 

### 12/8/2009 11 :50 18.3 1.7 146.9 PointC Run 1 

### 12/8/2009 11 :51 18.3 1.7 144.6 Point C Run 1 

### 12/8/200911 :51 18.3 1.7 143.0 PointC Run 1 

### 12/8/2009 11 :51 18.3 1.7 142.9 Point C Run 1 

### 12/8/2009 11 :52 18.3 1.7 144.0 

### 12/8/2009 11 :52 18,3 1.7 145.5 

### 12/8/2009 11 :52 18.3 1.7 146.1 

### 12/8/2009 11 :53 18.3 1.7 147.6 

### 12/8/2009 11 :53 18.3 1.7 149.4 

### 12/8/2009 11 :53 18.3 1.7 149.5 

### 12/8/2009 11 :54 18.3 1.7 148.6 

### 12/8/2009 11 :54 18.3 1.7 147.8 

### 12/8/2009 11 :54 18.3 1.7 147.9 

### 12/8/2009 11 :55 18.6 1.5 147.9 

### 12/8/2009 11 :55 20.6 0.2 111.1 

### 12/8/2009 11 :55 20.8 0.1 47.8 

### 12/8/2009 11 :56 20.8 0.1 23.4 

### 12/8/2009 11 :56 20.8 0.1 14.5 

### 121812009 11 :56 20.8 0.1 10.5 

### 12/8/2009 11 :57 20.8 0.1 8.1 

### 12/8/2009 11 :57 20.8 0.1 6.6 

### 12/8/2009 11 :57 20.8 0.1 5.6 

### 12/8/2009 11 :58 20.8 0.1 4.9 

### 12/8/2009 11 :58 20.8 0.1 4.6 

### 12/8/2009 11 :58 20.1 0.1 4.0 

### 12/8/2009 11 :59 14.9 0.1 3.9 

### 12/8/2009 11 :59 20.7 0.1 5.0 Drift Check 

### 12/8/2009 11 :59 17.8 0.1 4.8 Drift Check 

### 12/8/2009 12:00 0.8 0.0 3.9 Drift Check 

### 12/8/2009 12:00 0.1 0.0 3.7 Drift Check 

### 12/8/2009 12:00 

### 0.1 0.0 3.5 02, C02, S02 Zero Drift Check 

### 12/8/2009 12:01 0.1 0.0 3.4 Drift Check 

### 12/8/2009 12:01 0.1 0.0 3.3 Drift Check 

### 12/8/2009 12:01 11.9 0.1 2.9 Drift Check 

### 12/8/2009 12:02 1.0 0.0 17.8 Drift Check 

### 12/8/2009 12:02 0.1 0.0 138.0 Drift Check 

### 12/8/2009 12:02 0.1 0.0 212.0 Drift Check 

### 12/8/2009 12:03 0.0 0.0 237.5 Drift Check 

### 12/8/2009 12:03 0.0 0.0 247.1 Drift Check 

### 12/8/2009 12:03 0.0 0.0 251.7 Drift Check 

### 12/8/2009 12:04 0.0 0.0 253.4 Drift Check 

### 12/8/2009 12:04 0.0 0.0 255.9 Drift Check
Page 10 of 21Cliffs Natural Resources Inc Reference Method Data Barr Engineering United Taconite Data Logger Output Sampled on 12-8-09 Forbes. Minnesota Line 2B WGS (SV049) TIMESTAMP 02_Avg C02_Avg S02_Avg TS Percent Percent PPM 12/8/2009 12:04 0.0 0.0 256.2 Drift Check 12/8/2009 12:05 0.0 0.0 258.7 Drift Check 12/8/2009 12:05 0.0 0.0 258.4 Drift Check 1218/2009 12:05 0.0 0.0 259.2 Drift Check 12/8/2009 12:06 0.0 0.0 259.2 Drift Check 1218/2009 12:06 0.0 0.0 259.2 Drift Check 12/8/2009 12:06 0.0 0.0 259.4 Drift Check 12/8/2009 12:07 1.7 0.0 

### 259.8 261.9 S02 Drift Check 12/8/2009 12:07 10.5 0.6 204.5 Drift Check 12/8/2009 12:07 18.9 3.8 135.0 Drift Check 1218/2009 12:08 19.8 3.9 55.5 Drift Check 12/8/2009 12:08 19.9 4.0 27.8 Drift Check 1218/2009 12:08 20.0 4.0 17.5 Drift Check 12/8/2009 12:09 20.0 4.0 12.8 Drift Check 12/8/2009 12:09 20.0 4.0 9.9 Drift Check 12/8/2009 12:09 20.0 4.0 8.2 Drift Check 12/8/200912:10 20.0 4.0 6.9 Drift Check 12/8/200912:10 

### 20.0 4.0 6.1 0220.0. C02 4.0 Drift Check 12/8/200912:10 20.0 4.0 5.0 Drift Check 12/8/200912:11 20.0 4.0 4.6 Drift Check 12/8/200912:11 20.3 2.5 4.5 Drift Check 12/8/200912:11 20.9 0.2 4.7 Drift Check 12/8/200912:12 20.9 0.1 4.6 Drift Check 12/8/200912:12 20.9 0.1 4.3 Drift Check 12/8/200912:12 20.9 0.1 4.2 Drift Check 12/8/200912:13 21.0 0.1 4.1 Drift Check 12/8/200912:13 21.0 0.1 3.9 12/8/2009 12:13 21.0 0.1 3.6 12/8/200912:14 21.0 0.1 3.2 12/8/200912:14 21.0 0.1 2.8 12/8/200912:14 21.0 0.1 2.6 12/8/200912:15 21.0 0.1 2.4 12/8/200912:15 21.0 0.1 2.2 12/8/2009 12:15 21.0 0.1 2.1 12/8/200912:16 21.0 0.1 1.9 12/8/2009 12:16 21.0 0.1 1.7 12/8/200912:16 21.0 0.1 1.5 12/8/2009 12:17 21.0 0.1 1.5 12/8/200912:17 21.0 0.1 1.4 12/8/200912:17 21.0 0.1 1.3 12/8/200912:18 21.0 0.1 1.4 12/8/200912:18 21.0 0.1 1.2 12/8/200912:18 21.0 0.1 1.3 12/8/200912:19 21.0 0.1 1.1 12/8/200912:19 21.0 0.1 1.1 12/8/2009 12:19 21.0 0.1 1.0 12/8/2009 12:20 21.0 0.1 0.9 12/8/2009 12:20 21.0 0.1 1.0 12/8/2009 12:20 21.0 0.1 1.0 1218/2009 12:21 21.0 0.1 0.9 12/8/2009 12:21 21.0 0.1 0.9 12/8/2009 12:21 21.0 0.1 0.9 12/8/2009 12:22 21.0 0.1 0.8 12/8/2009 12:22 19.3 1.3 9.6 12/8/2009 12:22 18.5 1.7 75.6 In Stack 12/8/2009 12:23 18.5 1.7 117.6 In Stack 12/8/2009 12:23 18.5 1.7 131.4 In Stack 12/8/2009 12:23 18.5 1.7 136.7 In Stack 12/8/2009 12:24 18.5 1.7 139.3 In Stack 12/8/2009 12:24 18.5 1.7 139.1 In Stack 12/8/2009 12:24 18.5 1.7 138.0 In Stack 12/8/2009 12:25 18.5 1.7 138.3 In Stack 12/8/2009 12:25 18.5 1.7 136.8 In Stack 12/8/2009 12:25 18.5 1.7 136.1 In Stack 12/8/2009 12:26 18.5 1.7 135.8 In Stack 12/8/2009 12:26 18.5 1.7 135.0 In Stack 12/8/2009 12:26 18.5 1.7 134.9 In Stack 12/8/2009 12:27 18.5 1.7 135.3 Run 2 12/8/2009 12:27 18.5 1.7 136.6 Run 2 12/8/2009 12:27 18.5 1.7 137.7 Run 2 12/8/2009 12:28 18.5 1.7 138.2 Run 2 12/8/2009 12:28 18.5 1.7 138.5 Run 2 12/8/2009 12:28 18.5 1.7 139.1 Run 2
Page 11 of 21Cliffs Natural Resources Inc Reference Method Data Barr Engineering United Taconite Data Logger Output Sampled on 12-8-09 Forbes, Minnesota Line 2B WGS (SV049) TIMESTAMP 02_Avg C02_Avg S02_Avg TS Percent Percent PPM 12/8/2009 12:29 18.5 1.7 138.6 Run 2 12/8/2009 12:29 18.5 1.7 138.5 Run 2 12/8/2009 12:29 18.5 1.7 138.6 Run 2 12/8/2009 12:30 18.5 1.7 139.0 Run 2 12/8/2009 12:30 18.5 1.7 140.0 Run 2 12/8/2009 12:30 18.5 1.7 140.8 Run 2 12/8/2009 12:31 18.5 1.7 141.5 Run 2 12/8/200912:31 18.5 1.7 142.5 Run 2 12/8/200912:31 18.4 1.7 143.0 Run 2 12/8/2009 12:32 18.4 1.7 142.7 Run 2 12/8/2009 12:32 18.4 1.7 142.4 Run 2 12/8/2009 12:32 18.5 1.7 142.5 Run 2 12/8/2009 12:33 18.5 1.7 141.7 Run 2 12/8/2009 12:33 18.5 1.7 141.2 Run 2 12/8/2009 12:33 18.5 1.7 141.6 Run 2 12/8/2009 12:34 18.5 1.7 141.5 Run 2 12/8/2009 12:34 18.5 1.7 140.6 Run 2 12/8/2009 12:34 18.5 1.7 140.9 Run 2 12/8/2009 12:35 18.5 1.7 141.2 Run 2 12/8/2009 12:35 18.5 1.7 140.4 Run 2 12/8/2009 12:35 18.5 1.7 140.2 Run 2 12/8/2009 12:36 18.5 1.7 141.5 Run 2 12/8/2009 12:36 18.5 1.7 141.7 Run 2 12/8/2009 12:36 18.5 1.7 142.2 Run 2 12/8/2009 12:37 18.5 1.7 143.2 Run 2 12/8/2009 12:37 18.5 1.7 143.8 Run 2 12/8/2009 12:37 18.5 1.7 144.3 Run 2 12/8/2009 12:38 18.5 1.7 144.9 Run 2 12/8/2009 12:38 18.5 1.7 145.6 Run 2 12/8/2009 12:38 18.5 1.7 146.0 Run 2 12/8/2009 12:39 18.5 1.7 145.7 Run 2 12/8/2009 12:39 18.4 1.7 145.8 Run 2 12/8/2009 12:39 18.4 1.7 146.2 Run 2 12/8/2009 12:40 18.4 1.7 147.2 Run 2 12/8/2009 12:40 18.4 1.7 148.9 Run 2 12/8/2009 12:40 18.4 1.7 150.2 Run 2 12/8/2009 12:41 18.4 1.7 150.3 Run 2 12/8/200912:41 18.4 1.7 150.4 Run 2 12/8/2009 12:41 18.4 1.7 150.3 Run 2 12/8/2009 12:42 18.4 1.7 150.7 Run 2 12/8/2009 12:42 18.4 1.7 153.2 Run 2 12/8/2009 12:42 18.4 1.7 155.6 Run 2 12/8/2009 12:43 18.4 1.7 156.4 Run 2 12/8/2009 12:43 18.5 1.7 156.3 Run 2 12/8/2009 12:43 18.4 1.7 156.3 Run 2 12/8/2009 12:44 18.5 1.7 157.2 Run 2 12/8/2009 12:44 18.4 1.7 158.5 Run 2 12/8/2009 12:44 18.4 1.7 159.0 Run 2 12/8/2009 12:45 18.5 1.7 159.3 Run 2 12/8/2009 12:45 18.4 1.7 160.0 Run 2 12/8/2009 12:45 18.4 1.7 160.3 Run 2 12/8/2009 12:46 18.4 1.7 159.5 Run 2 12/8/2009 12:46 18.4 1.7 159.2 Run 2 12/8/2009 12:46 18.4 1.8 159.0 Run 2 12/8/200912:47 18.4 1.8 158.1 Run 2 12/8/200912:47 18.4 1.8 157.4 Run 2 12/8/2009 12:47 18.4 1.8 157.6 Run 2 12/8/2009 12:48 18.4 1.8 158.1 Run 2 12/8/2009 12:48 18.4 1.8 158.2 Run 2 12/8/2009 12:48 18.4 1.7 157.9 Run 2 12/8/2009 12:49 18.4 1.7 157.4 Run 2 12/8/2009 12:49 18.4 1.7 157.0 Run 2 12/8/2009 12:49 18.4 1.7 157.3 Run 2 12/8/2009 12:50 18.5 1.7 157.0 Run 2 12/8/2009 12:50 18.5 1.7 156.0 Run 2 12/8/2009 12:50 18.5 1.7 155.4 Run 2 12/8/2009 12:51 18.4 1.7 154.9 Run 2 12/8/2009 12:51 18.4 1.7 154.9 Run 2 12/8/200912:51 18.5 1.7 155.4 Run 2 12/8/2009 12:52 18.5 1.7 155.3 Run 2 12/8/2009 12:52 18.4 1.7 154.3 Run 2 12/8/2009 12:52 18.4 1.7 153.5 Run 2 12/8/2009 12:53 18.4 1.7 153.7 Run 2
Page 12 of 21Cliffs Natural Resources Inc Reference Method Data Barr Engineering United Taconite Data Logger Output Sampled on 12-8-09 Forbes, Minnesota Line 28 WGS (SV049) TIMESTAMP 02_Avg C02_Avg S02_Avg TS Percent Percent PPM 12/8/2009 12:53 18.4 1.7 154.3 Run 2 12/8/2009 12:53 18.4 1.7 153.9 Run 2 12/8/2009 12:54 18.5 1.7 153.3 Run 2 12/8/2009 12:54 19.2 1.2 151.9 Run 2 12/8/2009 12:54 20.9 0.1 98.4 Run 2 12/8/2009 12:55 20.9 0.1 41.3 Run 2 12/8/2009 12:55 20.9 0.1 21.2 Run 2 12/8/2009 12:55 20.9 0.1 13.7 Run 2 12/8/2009 12:56 20.9 0.1 10.2 Run 2 12/8/2009 12:56 20.9 0.1 8.1 Run 2 12/8/2009 12:56 20.9 0.1 6.8 Run 2 12/8/2009 12:57 20.9 0.1 5.8 Run 2 12/8/2009 12:57 20.6 0.4 4.9 Run 2 1218/2009 12:57 18.5 1.7 30.2 Run 2 12/8/2009 12:58 18.4 1.7 94.7 Run 2 12/8/2009 12:58 18.4 1.7 125.9 Run 2 12/8/2009 12:58 18.4 1.7 137.2 Run 2 12/8/2009 12:59 18.4 1.7 141.4 Run 2 12/8/2009 12:59 18.4 1.7 142.7 Run 2 12/8/2009 12:59 18.4 1.7 145.1 Run 2 12/8/2009 13:00 18.4 1.7 144.6 Run 2 12/8/2009 13:00 18.5 1.7 142.0 Run 2 12/8/2009 13:00 18.5 1.7 140.6 Run 2 12/8/2009 13:01 18.5 1.7 140.7 Run 2 12/8/2009 13:01 18.5 1.7 141.4 Run 2 12/8/2009 13:01 18.5 1.7 142.8 Run 2 12/8/2009 13:02 18.5 1.7 143.9 Run 2 12/8/2009 13:02 18.5 1.7 144.3 Run 2 12/8/2009 13:02 18.5 1.7 144.5 Run 2 12/8/2009 13:03 18.5 1.7 143.8 Run 2 12/8/2009 13:03 18.5 1.7 144.1 Run 2 12/8/2009 13:03 18.5 1.7 145.1 Run 2 12/8/2009 13:04 18.5 1.7 145.4 Run 2 12/8/2009 13:04 18.5 1.7 145.1 Run 2 12/8/2009 13:04 18.5 1.7 144.2 Run 2 12/8/2009 13:05 18.5 1.7 143.6 Run 2 12/8/2009 13:05 18.5 1.7 143.4 Run 2 12/8/2009 13:05 18.5 1.7 143.2 Run 2 12/8/2009 13:06 18.5 1.7 142.6 Run 2 12/8/2009 13:06 18.4 1.7 142.1 Run 2 12/8/2009 13:06 18.5 1.7 142.3 Run 2 12/8/2009 13:07 18.4 1.7 142.9 Run 2 12/8/2009 13:07 18.4 1.7 143.5 Run 2 12/8/2009 13:07 18.4 1.7 143.4 Run 2 12/8/2009 13:08 18.5 1.7 141.9 Run 2 12/8/2009 13:08 18.4 1.7 140.8 Run 2 12/8/2009 13:08 18.4 1.7 141.4 Run 2 12/8/2009 13:09 18.4 1.7 142.5 Run 2 12/8/2009 13:09 18.4 1.7 143.7 Run 2 12/8/2009 13:09 18.4 1.7 143.9 Run 2 12/8/200913:10 18.4 1.7 144.2 Run 2 12/8/2009 13:10 18.4 1.7 144.8 Run 2 12/8/200913:10 18.5 1.7 145.0 Run 2 12/8/2009 13:11 18.5 1.7 145.5 Run 2 12/8/2009 13:11 18.5 1.7 145.5 Run 2 12/8/2009 13:11 18.4 1.7 145.4 Run 2 12/8/2009 13:12 18.5 1.7 145.8 Run 2 12/8/200913:12 18.5 1.7 147.2 Run 2 12/8/2009 13:12 18.5 1.7 147.8 Run 2 12/8/200913:13 18.4 1.7 148.0 Run 2 12/8/200913:13 18.4 1.7 149.1 Run 2 12/8/200913:13 18.4 1.7 150.6 Run 2 12/8/200913:14 18.5 1.7 151.9 Run 2 12/8/200913:14 18.5 1.7 152.6 Run 2 12/8/200913:14 18.5 1.7 152.7 Run 2 1218/200913:15 18.4 1.7 152.0 Run 2 12/8/200913:15 18.5 1.7 152.3 Run 2 12/8/2009 13:15 18.5 1.7 152.4 Run 2 12/8/2009 13:16 18.4 1.7 152.1 Run 2 12/8/2009 13:16 18.5 1.7 152.7 Run 2 12/8/200913:16 18.5 1.7 152.7 Run 2 12/8/200913:17 18.5 1.7 152.2 Run 2 12/8/200913:17 18.5 1.7 151.4 Run 2
Page 13 of21Cliffs Natural Resources Inc Reference Method Data Barr Engineering United Taconite Data Logger Output Sampled on 12-8-09 Forbes, Minnesota Line 2B WGS (SV049) TIMESTAMP 02_Avg C02_Avg S02_Avg TS Percent Percent PPM 

### 12/8/200913:17 18.5 1.7 151.4 Run 2 

### 12/8/200913:18 18.5 1.7 152.1 Run 2 

### 12/8/200913:18 18.5 1.7 152.9 Run 2 

### 12/8/200913:18 18.5 1.7 153.4 Run 2 

### 12/8/200913:19 18.5 1.7 153.3 Run 2 

### 12/8/200913:19 18.5 1.7 152.6 Run 2 

### 12/8/200913:19 18.5 1.7 151.1 Run 2 

### 12/8/2009 13:20 18.5 1.7 149.6 Run 2 

### 1218/2009 13:20 18.5 1.7 148.5 Run 2 

### 12/8/2009 13:20 18.5 1.7 148.5 Run 2 

### 12/8/200913:21 18.5 1.7 148.4 Run 2 

### 12/8/2009 13:21 18.5 1.7 147.6 Run 2 

### 12/8/2009 13:21 18.5 1.7 148.0 Run 2 

### 12/8/2009 13:22 18.5 1.7 148.4 Run 2 

### 12/8/2009 13:22 18.5 1.7 148.0 Run 2 

### 12/8/2009 13:22 18.5 1.7 147.4 Run 2 

### 12/8/2009 13:23 18.5 1.7 146.8 Run 2 

### 12/8/2009 13:23 18.5 1.7 146.7 Run 2 

### 1218/2009 13:23 18.5 1.7 147.3 Run 2 

### 12/8/2009 13:24 18.5 1.7 146.8 Run 2 

### 12/8/2009 13:24 18.5 1.7 146.4 Run 2 

### 12/8/2009 13:24 18.5 1.7 146.5 Run 2 

### 12/8/2009 13:25 18.5 1.7 145.6 Run 2 

### 12/8/2009 13:25 18.5 1.7 144.9 Run 2 

### 12/8/2009 13:25 18.5 1.7 143.7 Run 2 

### 12/8/2009 13:26 18.5 1.7 142.6 Run 2 

### 12/8/2009 13:26 18.5 1.7 140.6 Run 2 

### 12/8/2009 13:26 18.5 1.7 137.7 Run 2 

### 12/8/2009 13:27 18.5 1.7 136.0 Run 2 

### 12/8/2009 13:27 18.4 1.7 136.1 Run 2 

### 12/8/2009 13:27 18.5 1.7 136.6 Run 2 

### 12/8/2009 13:28 18.5 1.7 136.6 Run 2 

### 12/8/2009 13:28 18.5 1.7 136.4 Run 2 

### 12/8/2009 13:28 18.4 1.7 136.9 Run 2 

### 12/8/2009 13:29 18.5 1.7 137.2 Run 2 

### 12/8/2009 13:29 18.5 1.7 136.9 Run 2 

### 12/8/2009 13:29 18.5 1.7 136.3 Run 2 

### 12/8/2009 13:30 18.5 1.7 135.6 Run 2 

### 12/8/2009 13:30 18.5 1.7 135.9 Run 2 

### 12/8/2009 13:30 18.5 1.7 136.6 Run 2 

### 12/8/200913:31 18.5 1.7 136.7 Run 2 

### 12/8/200913:31 18.5 1.7 137.0 Run 2 

### 12/8/200913:31 18.5 1.7 136.7 Run 2 

### 12/8/2009 13:32 18.5 1.7 136.6 Run 2 

### 12/8/2009 13:32 18.5 1.7 136.5 Run 2 

### 12/8/2009 13:32 18.5 1.7 137.1 Run 2 

### 12/8/2009 13:33 18.5 1.7 138.4 Run 2 

### 12/8/2009 13:33 18.5 1.7 139.0 Run 2 

### 12/8/2009 13:33 18.5 1.7 139.5 Run 2 

### 12/8/2009 13:34 18.5 1.7 140.3 Run 2 

### 12/8/2009 13:34 18.5 1.7 141.2 Run 2 

### 12/8/2009 13:34 18.5 1.7 142.5 Run 2 

### 12/8/2009 13:35 18.5 1.7 143.8 Run 2 

### 12/8/2009 13:35 18.5 1.7 143.9 Run 2 

### 12/8/2009 13:35 18.5 1.7 143.3 

### 12/8/2009 13:36 18.5 1.7 143.2 

### 12/8/2009 13:36 18.5 1.7 143.1 

### 12/8/2009 13:36 18.5 1.7 143.0 

### 12/8/2009 13:37 18.5 1.7 143.3 

### 12/8/2009 13:37 18.5 1.7 143.5 

### 12/8/2009 13:37 18.5 1.7 143.7 

### 12/8/2009 13:38 18.5 1.7 143.0 

### 12/8/2009 13:38 19.0 1.3 141.3 

### 12/8/2009 13:38 20.9 0.1 98.2 

### 12/8/2009 13:39 20.9 0.1 44.0 

### 12/8/2009 13:39 20.9 0.1 23.0 

### 12/8/2009 13:39 20.9 0.1 15.0 

### 12/8/2009 13:40 20.9 0.1 11.0 

### 12/8/2009 13:40 20.9 0.1 8.4 

### 12/8/2009 13:40 20.9 0.1 7.1 

### 12/8/200913:41 20.9 0.1 6.0 

### 12/8/200913:41 20.9 0.1 5.1 

### 12/8/2009 13:41 20.9 0.1 4.5
Page 14 of 21Cliffs Natural Resources Inc Reference Method Data Barr Engineering United Taconite Data Logger Output Sampled on 12-8-09 Forbes. Minnesota Line 2B WGS (SV049) TIMESTAMP 02_Avg C02_Avg S02_Avg TS Percent Percent PPM 12/8/2009 13:42 20.9 0.1 4.4 12/8/2009 13:42 20.9 0.1 4.4 12/8/2009 13:42 20.9 0.1 4.3 12/8/2009 13:43 20.9 0.1 3.9 12/8/2009 13:43 20.9 0.1 3.0 12/8/2009 13:43 20.9 0.1 2.5 Drift Check 12/8/2009 13:44 20.9 0.2 2.2 Drift Check 12/8/2009 13:44 20.0 3.1 2.2 Drift Check 12/8/2009 13:44 20.0 3.9 2.7 Drift Check 12/8/2009 13:45 20.0 4.0 3.0 0220.0. C02 4.0 Drift Check 12/8/2009 13:45 20.0 4.0 2.5 Drift Check 12/8/2009 13:45 20.3 2.4 2.0 Drift Check 12/8/2009 13:46 13.3 1.7 1.8 Drift Check 12/8/2009 13:46 0.3 0.1 1.7 Drift Check 12/8/2009 13:46 0.1 0.1 1.7 Drift Check 12/8/200913:47 0.1 0.1 2.1 Drift Check 12/8/200913:47 0.1 0.1 2.3 Drift Check 12/8/2009 13:47 0.1 0.1 2.4 Drift Check 12/8/2009 13:48 0.1 0.1 2.3 Drift Check 12/8/2009 13:48 0.1 0.0 2.5 Drift Check 12/8/2009 13:48 0.1 0.0 2.3 Drift Check 12/8/2009 13:49 

### 0.0 0.0 2.2 02. C02. S02 Zero Drift Check 12/8/2009 13:49 0.0 0.0 2.2 Drift Check 1218/2009 13:49 0.0 0.0 2.2 Drift Check 12/8/2009 13:50 0.0 0.0 2.1 Drift Check 12/8/2009 13:50 0.0 0.0 2.0 Drift Check 12/8/2009 13:50 0.0 0.0 2.0 Drift Check 12/8/2009 13:51 10.6 0.1 1.7 Drift Check 12/8/2009 13:51 0.8 0.0 19.5 Drift Check 12/8/2009 13:51 0.1 0.0 133.7 Drift Check 12/8/2009 13:52 0.0 0.0 204.2 Drift Check 12/8/2009 13:52 0.0 0.0 230.8 Drift Check 12/8/2009 13:52 0.0 0.0 242.0 Drift Check 12/8/2009 13:53 0.0 0.0 247.9 Drift Check 12/8/2009 13:53 0.0 0.0 250.5 Drift Check 12/8/2009 13:53 0.0 0.0 253.1 Drift Check 12/8/2009 13:54 0.0 0.0 254.3 Drift Check 12/8/2009 13:54 0.0 0.0 256.0 Drift Check 12/8/2009 13:54 0.0 0.0 256.3 Drift Check 12/8/2009 13:55 0.0 0.0 258.0 Drift Check 12/8/2009 13:55 0.0 0.0 258.1 Drift Check 12/8/2009 13:55 0.0 0.0 

### 258.9 261.9 S02 Drift Check 12/8/2009 13:56 4.7 0.1 256.7 Drift Check 12/8/2009 13:56 20.4 0.1 160.3 12/8/2009 13:56 20.8 0.1 63.2 12/8/2009 13:57 20.9 0.1 33.2 12/8/2009 13:57 20.9 0.1 22.0 12/8/2009 13:57 20.9 0.1 16.4 12/8/2009 13:58 20.9 0.1 12.6 12/8/2009 13:58 20.9 0.1 10.0 12/8/2009 13:58 20.9 0.1 8.3 12/8/2009 13:59 20.9 0.1 7.0 12/8/2009 13:59 20.9 0.1 6.2 12/8/2009 13:59 20.9 0.1 5.3 12/8/2009 14:00 20.9 0.1 5.1 12/8/2009 14:00 20.9 0.1 4.4 12/8/200914:00 20.9 0.1 4.1 12/8/2009 14:01 20.9 0.1 3.7 12/8/2009 14:01 20.9 0.1 3.4 12/8/2009 14:01 20.9 0.1 3.0 12/8/200914:02 20.9 0.1 2.9 12/8/2009 14:02 20.9 0.1 2.5 12/8/200914:02 20.9 0.1 2.4 12/8/2009 14:03 20.9 0.1 2.1 12/8/200914:03 20.9 0.1 2.0 12/8/200914:03 20.9 0.1 1.8 12/8/2009 14:04 20.9 0.1 1.7 12/8/200914:04 20.9 0.1 1.7 12/8/2009 14:04 20.9 0.1 1.6 12/8/2009 14:05 20.9 0.1 1.4 12/8/200914:05 20.9 0.1 1.4 12/8/200914:05 20.9 0.1 1.4 12/8/200914:06 20.9 0.1 1.3
Page 150f21Cliffs Natural Resources Inc Reference Method Data Barr Engineering United Taconite Data Logger Output Sampled on 12-8-09 Forbes, Minnesota Line 2B WGS (SV049) TIMESTAMP 02_Avg C02_Avg S02_Avg TS Percent Percent PPM 12/8/2009 14:06 20.9 0.1 1.2 12/8/2009 14:06 20.9 0.1 1.2 12/8/2009 14:07 20.9 0.1 1.2 12/8/2009 14:07 20.9 0.1 1.2 12/8/2009 14:07 20.9 0.1 0.9 12/8/2009 14:08 20.9 0.1 0.9 12/8/2009 14:08 20.9 0.1 0.8 12/8/2009 14:08 20.9 0.1 0.9 12/8/2009 14:09 20.9 0.1 0.8 12/8/200914:09 20.9 0.1 0.8 12/8/2009 14:09 20.9 0.1 0.8 12/8/200914:10 20.9 0.1 0.7 12/8/200914:10 20.9 0.1 0.7 12/8/200914:10 20.9 0.1 0.7 12/8/200914:11 20.9 0.1 0.6 12/8/2009 14:11 20.9 0.1 0.7 12/8/200914:11 20.9 0.1 0.7 12/8/200914:12 20.9 0.1 0.6 12/8/200914:12 20.9 0.1 0.5 12/8/200914:12 20.9 0.1 0.7 12/8/200914:13 20.9 0.1 0.7 12/8/200914:13 20.9 0.1 0.6 12/8/200914:13 20.9 0.1 0.7 12/8/200914:14 20.9 0.1 0.6 12/8/200914:14 20.9 0.1 0.6 12/8/200914:14 20.9 0.1 0.6 12/8/2009 14:15 20.9 0.1 0.7 12/8/200914:15 20.9 0.1 0.8 12/8/200914:15 20.9 0.1 0.5 12/8/200914:16 20.9 0.1 0.5 12/8/200914:16 20.9 0.1 0.6 12/8/200914:16 20.9 0.1 0.5 12/8/2009 14:17 19.5 1.0 5.5 In Stack 12/8/2009 14:17 18.5 1.7 69.0 In Stack 12/8/200914:17 18.5 1.7 118.2 In Stack 12/8/200914:18 18.5 1.7 134.6 In Stack 12/8/200914:18 18.5 1.7 141.0 In Stack 12/8/200914:18 18.5 1.7 142.4 In Stack 12/8/200914:19 18.5 1.7 144.7 In Stack 12/8/2009 14:19 18.5 1.7 145.9 In Stack 12/8/200914:19 18.5 1.7 145.4 In Stack 12/8/2009 14:20 18.5 1.7 144.5 In Stack 12/8/2009 14:20 18.5 1.7 145.3 In Stack 12/8/2009 14:20 18.5 1.7 144.6 In Stack 12/8/200914:21 18.5 1.7 144.7 In Stack 12/8/2009 14:21 18.5 1.7 143.0 In Stack 12/8/2009 14:21 18.5 1.7 140.7 In Stack 12/8/2009 14:22 18.5 1.7 140.0 In Stack 12/8/200914:22 18.5 1.7 139.9 In Stack 12/8/2009 14:22 18.5 1.7 139.0 In Stack 12/8/2009 14:23 18.5 1.7 137.5 In Stack 12/8/2009 14:23 18.5 1.7 136.7 In Stack 12/8/200914:23 18.5 1.7 135.4 In Stack 12/8/2009 14:24 18.5 1.7 134.1 In Stack 12/8/200914:24 18.5 1.7 133.4 In Stack 12/8/2009 14:24 18.5 1.7 133.0 In Stack 12/8/2009 14:25 18.5 1.7 132.6 In Stack 12/8/2009 14:25 18.5 1.7 131.9 In Stack 12/8/2009 14:25 18.5 1.7 131.8 In Stack 12/8/200914:26 18.5 1.7 132.1 In Stack 12/8/2009 14:26 18.5 1.7 132.0 In Stack 12/8/2009 14:26 18.5 1.7 131.6 In Stack 12/8/2009 14:27 18.5 1.7 131.6 In Stack 12/8/2009 14:27 18.5 1.7 132.0 In Stack 12/8/200914:27 18.5 1.7 132.2 In Stack 12/8/200914:28 18.5 1.7 132.3 Run 3 12/8/200914:28 18.5 1.7 133.0 Run 3 12/8/2009 14:28 18.5 1.7 133.1 Run 3 12/8/2009 14:29 18.5 1.7 134.6 Run 3 1218/2009 14:29 18.5 1.7 136.5 Run 3 12/8/200914:29 18.5 1.7 137.4 Run 3 12/8/200914:30 18.5 1.7 137.9 Run 3 12/8/200914:30 18.5 1.7 139.5 Run 3
Page 16 of 21Cliffs Natural Resources Inc Reference Method Data Barr Engineering United Taconite Data Logger Output Sampled on 12-8-09 Forbes, Minnesota Line 2B WGS (SV049) TIMESTAMP 02_Avg C02_Avg S02_Avg TS Percent Percent PPM 12/8/2009 14:30 18.5 1.7 141.8 Run 3 12/8/200914:31 18.5 1.7 142.8 Run 3 12/8/200914:31 18.5 1.7 142.8 Run 3 12/8/2009 14:31 18.5 1.7 143.4 Run 3 12/8/2009 14:32 18.5 1.7 144.0 Run 3 12/8/2009 14:32 18.5 1.7 143.5 Run 3 12/8/2009 14:32 18.5 1.7 142.4 Run 3 12/8/2009 14:33 18.5 1.7 141.8 Run 3 12/8/2009 14:33 18.5 1.7 142.1 Run 3 12/8/2009 14:33 18.5 1.7 142.2 Run 3 12/8/2009 14:34 18.5 1.7 142.0 Run 3 12/8/2009 14:34 18.5 1.7 141.3 Run 3 1218/2009 14:34 18.5 1.7 139.9 Run 3 1218/2009 14:35 18.5 1.7 139.1 Run 3 12/8/200914:35 18.5 1.7 139.1 Run 3 12/8/200914:35 18.5 1.7 140.3 Run 3 12/8/200914:36 18.5 1.7 141.8 Run 3 12/8/200914:36 18.5 1.7 143.1 Run 3 12/8/2009 14:36 18.5 1.7 143.7 Run 3 12/8/2009 14:37 18.5 1.7 143.6 Run 3 12/8/2009 14:37 18.5 1.7 144.0 Run 3 12/8/2009 14:37 18.5 1.7 144.3 Run 3 12/8/2009 14:38 18.5 1.7 144.5 Run 3 12/8/2009 14:38 18.5 1.7 144.8 Run 3 12/8/2009 14:38 18.5 1.7 144.1 Run 3 12/8/2009 14:39 18.5 1.7 143.5 Run 3 12/8/2009 14:39 18.5 1.7 143.6 Run 3 12/8/2009 14:39 18.5 1.7 142.7 Run 3 12/8/2009 14:40 18.5 1.7 142.1 Run 3 12/8/2009 14:40 18.5 1.7 142.7 Run 3 12/8/2009 14:40 18.5 1.7 142.5 Run 3 12/8/200914:41 18.5 1.7 141.6 Run 3 12/8/200914:41 18.5 1.7 140.9 Run 3 12/8/2009 14:41 18.5 1.7 140.8 Run 3 12/8/2009 14:42 18.5 1.7 140.4 Run 3 12/8/2009 14:42 18.5 1.7 140.4 Run 3 12/8/200914:42 18.5 1.7 140.4 Run 3 12/8/2009 14:43 18.5 1.7 140.2 Run 3 12/8/2009 14:43 18.5 1.7 140.3 Run 3 12/8/2009 14:43 18.5 1.7 141.1 Run 3 12/8/2009 14:44 18.5 1.7 141.2 Run 3 12/8/2009 14:44 18.5 1.7 140.7 Run 3 12/8/2009 14:44 18.5 1.7 139.6 Run 3 12/8/2009 14:45 18.5 1.7 139.1 Run 3 12/8/2009 14:45 18.5 1.7 138.9 Run 3 12/8/2009 14:45 18.5 1.7 138.1 Run 3 12/8/2009 14:46 18.4 1.7 137.9 Run 3 12/8/200914:46 18.4 1.7 138.7 Run 3 12/8/200914:46 18.4 1.7 139.7 Run 3 12/8/200914:47 18.4 1.7 141.1 Run 3 12/8/200914:47 18.4 1.7 142.1 Run 3 12/8/200914:47 18.5 1.7 142.2 Run 3 12/8/2009 14:48 18.4 1.7 141.7 Run 3 12/8/200914:48 18.4 1.7 142.5 Run 3 12/8/200914:48 18.4 1.7 144.0 Run 3 12/8/2009 14:49 18.4 1.7 145.2 Run 3 12/8/2009 14:49 18.4 1.7 145.3 Run 3 12/8/2009 14:49 18.4 1.7 144.2 Run 3 12/8/2009 14:50 18.4 1.7 143.4 Run 3 12/8/2009 14:50 18.4 1.7 142.8 Run 3 12/8/2009 14:50 18.4 1.7 142.0 Run 3 12/8/200914:51 18.4 1.8 141.0 Run 3 12/8/200914:51 18.4 1.8 141.0 Run 3 12/8/2009 14:51 18.4 1.7 142.4 Run 3 12/8/2009 14:52 18.4 1.8 144.0 Run 3 12/8/200914:52 18.4 1.7 145.2 Run 3 12/8/2009 14:52 18.4 1.7 146.6 Run 3 12/8/2009 14:53 18.4 1.7 147.2 Run 3 12/8/200914:53 18.4 1.7 147.7 Run 3 12/8/2009 14:53 18.4 1.7 147.5 Run 3 12/8/2009 14:54 18.4 1.7 146.7 Run 3 12/8/200914:54 18.4 1.7 146.2 Run 3 12/8/2009 14:54 18.4 1.7 145.5 Run 3
Page 17 of21Cliffs Natural Resources Inc Reference Method Data Barr Engineering United Taconite Data Logger Output Sampled on 12-8-09 Forbes, Minnesota Line 2B WGS (SV049) TIMESTAMP 02_Avg C02_Avg S02_Avg TS Percent Percent PPM 12/8/2009 14:55 18.4 1.7 144.7 Run 3 12/8/2009 14:55 18.4 1.7 144.5 Run 3 12/8/2009 14:55 18.4 1.7 144.3 Run 3 12/8/2009 14:56 18.4 1.7 144.9 Run 3 12/8/2009 14:56 18.4 1.7 145.6 Run 3 12/8/2009 14:56 18.4 1.7 145.0 Run 3 12/8/2009 14:57 18.4 1.7 143.9 Run 3 12/8/2009 14:57 18.4 1.7 144.3 Run 3 12/8/2009 14:57 18.4 1.7 145.1 Run 3 12/8/200914:58 18.4 1.7 145.9 Run 3 12/8/2009 14:58 18.4 1.7 146.8 Run 3 12/8/200914:58 18.4 1.7 147.7 Run 3 12/8/200914:59 18.4 1.7 148.6 Run 3 12/8/2009 14:59 18.4 1.7 149.0 Run 3 12/8/2009 14:59 18.4 1.7 149.3 Run 3 12/8/2009 15:00 18.4 1.7 150.7 Run 3 12/8/2009 15:00 18.4 1.7 152.3 Run 3 12/8/2009 15:00 18.4 1.7 153.2 Run 3 12/8/2009 15:01 18.4 1.7 153.4 Run 3 12/8/2009 15:01 18.4 1.7 154.5 Run 3 12/8/2009 15:01 18.4 1.8 155.8 Run 3 12/8/2009 15:02 18.4 1.7 157.7 Run 3 12/8/2009 15:02 18.4 1.7 158.3 Run 3 1218/2009 15:02 18.4 1.8 157.6 Run 3 12/8/2009 15:03 18.4 1.8 158.1 Run 3 12/8/2009 15:03 18.4 1.8 159.2 Run 3 12/8/2009 15:03 18.4 1.8 159.3 Run 3 12/8/2009 15:04 18.4 1.8 159.9 Run 3 12/8/2009 15:04 18.4 1.7 161.5 Run 3 12/8/2009 15:04 18.4 1.7 162.4 Run 3 12/8/2009 15:05 18.4 1.7 162.1 Run 3 12/8/2009 15:05 18.4 1.8 161.8 Run 3 12/8/2009 15:05 18.4 1.7 161.8 Run 3 12/8/2009 15:06 18.4 1.8 160.8 Run 3 12/8/2009 15:06 18.4 1.8 159.8 Run 3 12/8/2009 15:06 18.4 1.8 159.7 Run 3 12/8/2009 15:07 18.4 1.8 159.6 Run 3 12/8/2009 15:07 18.4 1.8 159.7 Run 3 12/8/2009 15:07 18.4 1.8 160.0 Run 3 12/8/2009 15:08 18.4 1.8 160.2 Run 3 12/8/2009 15:08 18.4 1.7 160.3 Run 3 12/8/2009 15:08 18.4 1.8 160.6 Run 3 12/8/2009 15:09 18.4 1.8 161.0 Run 3 12/8/2009 15:09 18.4 1.7 161.4 Run 3 12/8/2009 15:09 18.4 1.7 160.5 Run 3 12/8/2009 15:10 18.4 1.7 158.9 Run 3 12/8/2009 15:10 18.4 1.7 158.8 Run 3 12/8/2009 15:10 18.4 1.7 158.9 Run 3 12/8/2009 15:11 18.4 1.7 158.5 Run 3 12/8/2009 15:11 18.4 1.7 158.2 Run 3 12/8/2009 15:11 18.4 1.7 158.0 Run 3 12/8/2009 15:12 18.4 1.7 157.6 Run 3 12/8/2009 15:12 18.4 1.7 157.6 Run 3 12/8/2009 15:12 18.4 1.7 157.6 Run 3 12/8/2009 15:13 18.4 1.7 157.1 Run 3 12/8/2009 15:13 18.4 1.7 156.1 Run 3 12/8/2009 15:13 18.4 1.7 155.9 Run 3 12/8/200915:14 18.4 1.7 155.2 Run 3 12/8/200915:14 18.4 1.8 154.3 Run 3 12/8/200915:14 18.4 1.7 153.9 Run 3 12/8/2009 15:15 20.3 0.5 136.8 Run 3 12/8/200915:15 20.9 0.1 65.6 Run 3 12/8/200915:15 20.9 0.1 30.5 Run 3 12/8/200915:16 20.8 0.2 17.9 Run 3 12/8/200915:16 18.6 1.6 34.3 Run 3 12/8/200915:16 18.4 1.7 97.4 Run 3 12/8/200915:17 18.4 1.7 125.8 Run 3 12/8/200915:17 18.4 1.7 136.1 Run 3 12/8/200915:17 18.4 1.8 140.9 Run 3 12/8/2009 15:18 18.4 1.7 142.0 Run 3 12/8/200915:18 18.4 1.7 142.9 Run 3 12/8/200915:18 18.4 1.8 144.2 Run 3 12/8/2009 15:19 18.4 1.8 145.1 Run 3
Page 18of21Cliffs Natural Resources Inc Reference Method Data Barr Engineering United Taconite Data Logger Output Sampled on 12-8-09 Forbes, Minnesota Line 2B WGS (SV049) TIMESTAMP 02_Avg C02_Avg S02_Avg TS Percent Percent PPM 12/8/200915:19 18.4 1.8 144.5 Run 3 12/8/2009 15:19 18.4 1.8 145.2 Run 3 12/8/2009 15:20 18.4 1.8 145.0 Run 3 12/8/2009 15:20 18.4 1.8 145.4 Run 3 12/8/2009 15:20 18.4 1.8 145.5 Run 3 1218/2009 15:21 18.4 1.8 145.3 Run 3 12/8/200915:21 18.4 1.8 146.3 Run 3 12/8/200915:21 18.4 1.8 147.5 Run 3 1218/2009 15:22 18.4 1.8 148.1 Run 3 12/8/2009 15:22 18.4 1.8 149.6 Run 3 12/8/2009 15:22 18.4 1.8 151.7 Run 3 12/8/2009 15:23 18.4 1.8 152.2 Run 3 12/8/2009 15:23 18.3 1.8 152.5 Run 3 12/8/2009 15:23 18.4 1.8 153.2 Run 3 12/8/2009 15:24 18.3 1.8 153.5 Run 3 12/8/2009 15:24 18.3 1.8 154.4 Run 3 12/8/2009 15:24 18.3 1.8 155.3 Run 3 12/8/2009 15:25 18.4 1.8 155.3 Run 3 12/8/2009 15:25 18.4 1.8 154.8 Run 3 12/8/2009 15:25 18.4 1.8 154.6 Run 3 12/8/2009 15:26 18.4 1.8 154.6 Run 3 12/8/2009 15:26 18.4 1.8 154.3 Run 3 12/8/2009 15:26 18.4 1.7 154.1 Run 3 12/8/2009 15:27 18.4 1.8 153.4 Run 3 12/8/2009 15:27 18.4 1.7 152.4 Run 3 12/8/2009 15:27 18.4 1.8 151.1 Run 3 12/8/2009 15:28 18.4 1.8 150.2 Run 3 12/8/2009 15:28 18.4 1.8 149.4 Run 3 12/8/2009 15:28 18.4 1.8 148.1 Run 3 12/8/2009 15:29 18.4 1.8 147.9 Run 3 12/8/2009 15:29 18.4 1.8 149.6 Run 3 12/8/2009 15:29 18.4 1.8 150.6 Run 3 12/8/2009 15:30 18.4 1.8 151.1 Run 3 12/8/2009 15:30 18.4 1.8 152.1 Run 3 12/8/2009 15:30 18.4 1.8 153.4 Run 3 12/8/200915:31 18.4 1.7 155.3 Run 3 12/8/200915:31 18.4 1.7 156.7 Run 3 12/8/200915:31 18.4 1.7 155.9 Run 3 12/8/2009 15:32 18.4 1.7 154.2 Run 3 12/8/2009 15:32 18.4 1.7 152.8 Run 3 12/8/2009 15:32 18.4 1.7 151.5 Run 3 12/8/2009 15:33 18.4 1.7 150.6 Run 3 12/8/2009 15:33 18.4 1.7 149.7 Run 3 12/8/2009 15:33 18.4 1.8 149.6 Run 3 12/8/2009 15:34 18.4 1.7 150.7 Run 3 12/8/2009 15:34 18.4 1.7 151.3 Run 3 12/8/2009 15:34 18.4 1.8 151.1 Run 3 12/8/2009 15:35 18.4 1.7 150.8 Run 3 12/8/2009 15:35 18.4 1.8 150.5 Run 3 12/8/2009 15:35 18.4 1.7 150.2 Run 3 12/8/2009 15:36 18.4 1.7 149.9 Run 3 12/8/2009 15:36 18.4 1.7 149.3 Run 3 12/8/2009 15:36 18.4 1.7 148.2 Run 3 12/8/2009 15:37 18.4 1.7 146.7 Run 3 12/8/2009 15:37 18.4 1.7 145.9 Run 3 12/8/2009 15:37 18.4 1.7 145.5 Run 3 12/8/2009 15:38 18.4 1.7 145.2 Run 3 12/8/2009 15:38 18.4 1.8 145.1 Run 3 12/8/2009 15:38 18.4 1.8 145.3 Run 3 12/8/2009 15:39 18.4 1.8 145.5 Run 3 12/8/2009 15:39 18.4 1.7 145.9 Run 3 12/8/2009 15:39 18.4 1.7 145.6 Run 3 12/8/2009 15:40 18.4 1.7 145.4 Run 3 12/8/2009 15:40 18.4 1.7 146.1 Run 3 12/8/2009 15:40 18.4 1.7 146.7 Run 3 12/8/2009 15:41 18.4 1.7 146.5 Run 3 12/8/2009 15:41 18.4 1.7 145.4 Run 3 12/8/2009 15:41 18.4 1.7 144.2 Run 3 12/8/2009 15:42 18.4 1.7 143.9 Run 3 12/8/2009 15:42 18.4 1.7 143.9 Run 3 12/8/2009 15:42 18.4 1.7 143.9 Run 3 12/8/2009 15:43 18.4 1.7 143.3 Run 3 12/8/2009 15:43 18.4 1.7 141.9 Run 3
Page 19 of21Cliffs Natural Resources Inc Reference Method Data Barr Engineering United Taconite Data Logger Output Sampled on 12-8-09 Forbes. Minnesota Line 2B WGS (SV049) TIMESTAMP 02_Avg C02_Avg S02_Avg TS Percent Percent PPM 12/8/2009 15:43 18.4 1.7 141.1 Run 3 12/8/2009 15:44 18.4 1.7 141.4 Run 3 12/8/2009 15:44 18.4 1.7 141.1 Run 3 12/8/2009 15:44 18.4 1.7 139.7 Run 3 12/8/2009 15:45 18.4 1.7 137.7 Run 3 12/8/2009 15:45 18.4 1.7 137.2 Run 3 12/8/2009 15:45 18.4 1.7 138.1 Run 3 12/8/2009 15:46 18.4 1.7 139.1 Run 3 12/8/2009 15:46 18.4 1.7 139.9 Run 3 12/8/2009 15:46 18.4 1.7 140.6 Run 3 12/8/200915:47 18.4 1.7 141.6 Run 3 12/8/200915:47 18.4 1.7 143.5 Run 3 12/8/200915:47 18.4 1.7 145.6 Run 3 12/8/2009 15:48 18.4 1.7 146.8 Run 3 12/8/2009 15:48 18.4 1.7 147.4 Run 3 12/8/2009 15:48 18.4 1.8 147.8 Run 3 12/8/2009 15:49 18.4 1.8 148.7 Run 3 12/8/2009 15:49 18.4 1.8 149.4 Run 3 12/8/2009 15:49 18.4 1.8 149.4 Run 3 12/8/2009 15:50 18.4 1.8 150.1 Run 3 12/8/2009 15:50 18.4 1.8 151.2 Run 3 12/8/2009 15:50 18.4 1.7 152.3 Run 3 12/8/200915:51 18.4 1.8 153.6 Run 3 12/8/2009 15:51 18.4 1.7 156.3 Run 3 12/8/2009 15:51 18.4 1.8 157.5 Run 3 12/8/2009 15:52 18.4 1.7 158.4 Run 3 12/8/2009 15:52 18.4 1.7 159.1 Run 3 12/8/2009 15:52 18.4 1.8 158.0 Run 3 12/8/200915:53 18.4 1.8 158.1 Run 3 12/8/2009 15:53 18.4 1.8 158.2 Run 3 12/8/2009 15:53 18.4 1.8 158.3 Run 3 12/8/2009 15:54 18.4 1.8 159.1 Run 3 12/8/2009 15:54 18.3 1.8 160.1 Run 3 12/8/2009 15:54 18.3 1.8 160.9 Run 3 12/8/2009 15:55 18.3 1.8 162.1 12/8/2009 15:55 14.7 2.5 158.5 Drift Check 12/8/2009 15:55 19.9 3.9 87.9 Drift Check 12/8/2009 15:56 19.9 4.0 37.7 Drift Check 12/8/2009 15:56 19.9 4.0 20.5 Drift Check 12/8/2009 15:56 19.9 4.0 13.4 Drift Check 12/8/2009 15:57 

### 19.9 4.0 9.8 02 20.0. C02 4.0 Drift Check 12/8/2009 15:57 19.9 4.0 7.8 Drift Check 12/8/2009 15:57 19.8 3.7 6.5 Drift Check 12/8/2009 15:58 15.9 2.4 30.0 Drift Check 12/8/2009 15:58 0.7 0.2 34.8 Drift Check 12/8/2009 15:58 0.1 0.1 17.1 Drift Check 12/8/2009 15:59 0.1 0.1 9.9 Drift Check 12/8/2009 15:59 0.1 0.1 7.5 Drift Check 12/8/2009 15:59 0.1 0.1 6.3 Drift Check 12/8/2009 16:00 0.1 0.1 5.6 Drift Check 12/8/2009 16:00 0.1 0.1 4.9 Drift Check 12/8/2009 16:00 0.0 0.1 4.5 Drift Check 12/8/2009 16:01 

### 0.0 0.1 4.3 02. C02. S02 Zero Drift Check 12/8/2009 16:01 6.4 0.7 5.2 Drift Check 12/8/2009 16:01 2.6 0.3 44.5 Drift Check 12/8/2009 16:02 0.1 0.1 143.7 Drift Check 12/8/2009 16:02 0.0 0.1 215.4 Drift Check 12/8/2009 16:02 0.0 0.1 240.5 Drift Check 12/8/2009 16:03 0.0 0.1 248.6 Drift Check 12/8/2009 16:03 0.0 0.1 250.9 Drift Check 12/8/2009 16:03 0.0 0.1 252.5 Drift Check 12/8/2009 16:04 0.0 0.1 253.0 Drift Check 12/8/2009 16:04 0.0 0.1 253.6 Drift Check 12/8/2009 16:04 0.0 0.1 254.1 Drift Check 12/8/2009 16:05 0.0 0.1 255.5 Drift Check 12/8/2009 16:05 0.0 0.1 255.8 Drift Check 12/8/2009 16:05 0.0 0.1 255.9 Drift Check 12/8/2009 16:06 0.0 0.1 256.6 Drift Check 12/8/2009 16:06 0.0 0.1 257.9 Drift Check 12/8/2009 16:06 0.0 0.1 258.8 Drift Check 12/8/2009 16:07 0.0 0.1 259.9 Drift Check 12/8/2009 16:07 0.0 0.1 259.9 Drift Check 12/8/2009 16:07 0.0 0.1 

### 260.3 261.9 S02 Drift Check
Page 20 of 21

### Cliffs Natural Resources Inc United Taconite Forbes, Minnesota

TS TIMESTAMP
12/8/2009 16:08 12/8/2009 16:08 12/8/2009 16:08 1218/2009 16:09 12/8/2009 16:09 12/8/2009 16:09 12/8/200916:10 12/8/200916:10 12/8/200916:10 12/8/200916:11 

### 02_Avg Percent

0.0 9.9 2.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 Reference Method Data Data Logger Output
Line 2B WGS (SV049) C02_Avg S02_Avg Percent PPM

0.1 261.1 1.0 262.5 0.2 240.7 0.1 122.2 0.1 48.8 0.1 25.6 0.1 16.5 0.1 12.6 0.1 10.0 0.1 8.7

Page 21 of21 Drift Check Drift Check Drift Check Drift Check Drift Check Drift Check Drift Check Drift Check Barr Engineering Sampled on 12-8-09

# Appendix E
Calibration Data

## Project Sample Loc. Date Operators Title V Compliance ine 2A Waste Gas Stack (SV048) 12/10/2009**---T=A-:-:-Kl~D=-J**

## KlTYL Analyzer Model / SN Analyzer Range (span) CAl Model 200 20.0 %

ANALYZER CALIBRATION DATA Note: Difference must be less than +/- 2 percent of span Cylinder Test Runs _1_-_3_ Value
Zero Gas 0.0 Mid-range 9.0 HiRh-range: 20.0

SYSTEM CALIBRATION BIAS AND DRIFT DATA: 

# EPA METHOD 3A ANALYZER CALIBRATION (Oxygen)

Cylinder Serial No. Zero Gas XC024800B Mid-range CC28340 High-range CC86018

Analyzer Absolute Difference, Calibration Difference % of Span Response 0.0 0.0 0.00% 9.0 0.0 0.00% 20.0 0.0 0.00%

Note: System Cal bias cannot exceed +/- 5 percent of span. Drift cannot exceed +/- 3 percent of span
Initial Values Final Values Analyzer Cal System Cal System Cal System Cal System Cal

Response, Response, Cal. Bias Response, Cal. Bias TEST RUN 1 PPM PPM % of Span PPM % of Span Zero Gas 0.0 0.1 0.50% 0.1 0.50% Upscale Gas 20.0 20.0 0.00% 20.0 0.00% TEST RUN 2 Zero Gas 0.0 0.1 0.50% 0.1 0.50% Upscale Gas 20.0 20.0 0.00% 19.9 -0.50% TEST RUN 3 Zero Gas 0.0 0.1 0.50% 0.1 0.50% Upscale Gas 20.0 19.9 -0.50% 20.0 0.00% System Calibration Bias 

## = [(System Cal. Response

- Analyzer Cal. Response) / Span] x 100 Drift

# =[(Final System Cal. Response -Initial System Cal Response) / Span] x 100 Drift, Percent of span 0.00% 0.00%

0.00% -0.50%

0.00% 0.50% Certified Value 0.0 9.0 20.0



## 02

## Project Sample Loc. Date Operators Title V Compliance ine 2A Waste Gas Stack (SV048) 

## 12/10/2009 ---T--A-'-K/"'""D'-JK/TYL Analyzer Modell SN Analyzer Range (span) CAl Model 200 9.0 %

ANALYZER CALIBRATION DATA Note: Difference must be less than 

## +1- 2 percent of span Cylinder Test Runs: _1_


# -**~** 

## Value
Zero Gas 0.0 Mid-range 4.0 High-range: 9.0

SYSTEM CALIBRATION BIAS AND DRIFT DATA: 

# EPA METHOD 3A ANALYZER CALIBRATION (C02)

Cylinder Serial No. Zero Gas XC024800B Mid-range CC86018 High-range CC28340

Analyzer Absolute Difference, Calibration Difference % of Span Response 0.0 0.0 0.00% 4.0 0.0 0.00% 9.0 0.0 0.00%

Note: System Cal bias cannot exceed 

## +1- 5 percent of span. Drift cannot exceed 

## +1- 3 percent of span
Initial Values Final Values Analyzer Cal System Cal System Cal System Cal System Cal

Response, Response, Cal. Bias Response, Cal. Bias TEST RUN 1 PPM PPM % of Span PPM % of Span Zero Gas 0.0 0.0 0.00% 0.0 0.00% Upscale Gas 4.0 4.0 0.00% 4.0 0.00% TEST RUN 2 Zero Gas 0.0 0.0 0.00% 0.0 0.00% Upscale Gas 4.0 4.0 0.00% 4.0 0.00% TEST RUN 3 Zero Gas 0.0 0.0 0.00% 0.0 0.00% Upscale Gas 4.0 4.0 0.00% 3.9 -1.11 % System Calibration Bias

- [(System Cal. Response

- Analyzer Cal. Response) 

## I Span] x 100 Drift

# =[(Final System Cal. Response

- Initial System Cal Response) 

## I Span] x 100 Drift, Percent of span 0.00% 0.00%

0.00% 0.00%

0.00% -1.11 % Certified Value 0.0 4.0 9.0



## C02

## Project Sample Lac. Date Operators Title V Compliance ine 2A Waste Gas Stack (SV048)

__**-=-:-:12-:-:/1~0/2009** 

## TAKlDJK1TYL Analyzer Model / SN Analyzer Range (span) API Model 100AH 479.0 ppm

ANALYZER CALIBRATION DATA Note: Difference must be less than +/- 2 percent of span Cylinder Test Runs 1


# -_3_ Value
Zero Gas 0.0 Mid-range 261.9 High-range: 479.0 Upper

- range: 96.5

SYSTEM CALIBRATION BIAS AND DRIFT DATA: 

# EPA METHOD 6C ANALYZER CALIBRATION (502)

Cylinder Serial No. Zero Gas XC024800B Mid-range CC74126 High-range CC12700 Upper-range CC62345

Analyzer Absolute Difference, Calibration Difference % of Span Response 0.6 0.6 0.13% 263.6 1.7 0.35% 478.0 1.0 0.21% 95.0 1.5 0.31%

Note: System Cal bias cannot exceed 

## +/- 5 percent of span. Drift cannot exceed 

## +/- 3 percent of span
Initial Values Final Values Analyzer Cal System Cal System Cal System Cal System Cal

Response, Response, Cal. Bias Response, Cal. Bias TEST RUN 1 PPM PPM % of Span PPM % of Span Zero Gas 0.6 2.7 0.44% 4.5 0.81% Upscale Gas 263.6 260.6 -0.63% 260.0 -0.75% TEST RUN 2 Zero Gas 0.6 4.5 0.81% 4.2 0.75% Upscale Gas 263.6 260.0 -0.75% 261.2 -0.50% TEST RUN 3 Zero Gas 0.6 4.2 0.75% 2.4 0.38% Upscale Gas 263.6 261.2 -0.50% 261.4 -0.46% System Calibration Bias 

## = [(System Cal. Response

- Analyzer Cal. Response) / Span] x 100 Drift

# =[(Final System Cal. Response -Initial System Cal Response) / Span] x 100 Drift, Percent of span 0.38% -0.13%

-0.06% 0.25%

-0.38% 0.04% Certified Value 0.0 261.9 479.0 96.5



## 502

# BARR
Project Sample Lac. Date Operators Compliance Testing Line 2B Waste Gas Stack 12/8/2009**-----:T~A:-:-KJ-:-:=-DJ** 

## KJTYL Analyzer Modell SN Analyzer Range (span) CAl Model 200 20.0 o· /0



## ANALYZER CALIBRATION DATA f\jote: Difference must be less than 

## +1- 2 percent of span

Test Runs 1**~,**

__ -_0_


## Zero Gas Mid-range High-range:

SYSTEM CALIBRATION BIAS AND DRIFT DATA: Cylinder Value

0.0 9.0 20.0 

# EPA METHOD 3A ANALYZER CALIBRATION (Oxygen)

Cylinder Serial No. Zero Gas XC024800B Mid-range CC28340 High-range CC86018

Analyzer Absolute Difference. Calibration Difference '}o 

## of Span Response 0.0 0.0 

## O.OO,}" 9.0 0.0 0.00% 20.0 0.0 0.00%

Note: System Cal bias cannot exceed +/- 5 percent of span. Drift cannot exceed 

## +1- 3 percent of span
Initial Values Final Values Analyzer Cal System Cal System Cal System Cal System Cal

Response, Response, Cal. Bias Response, Cal. Bias TEST RUN 1 PPM PPM % 

## of Span PPM % of Span Zero Gas 0.0 0.1 0.50% 0.1 0.50% Upscale Gas 20.0 20.0 0.00% 20.0 0.00% TEST RUN 2 Zero Gas 0.0 0.1 0.50% 0.0 0.00% Upscale Gas 20.0 20.0 0.00% 20.0 0.00% TEST RUN 3 Zero Gas 0.0 0.0 0.00% 0.0 0.00% Upscale Gas 20.0 20.0 0.00% 19.9 -0.50% System Calibration Bias = 

## [(System Cal. Response

- Analyzer Cal. Response) 

## 1Span] x 100 Drift = 

## [(Final System Cal. Response

- Initial System Cal Response) 

## 1Span] x 100 Drift, Percent of span 0.00% 0.00%

-0.50% 0.00%

0.00% -0.50% Certified Value 0.0 9.0 20.0



## 02

# BARR Project Sample Loc. Date Operators Compliance Testing Line 2B Waste Gas Stack 

## 12/8/2009 -----:T:::-A:-:"K"'"'/-::-DJ KlTYL Analyzer Modell SN Analyzer Range (span) CAl Model 200 9.0 D' /0



## ANALYZER CALIBRATION DATA Note: Difference must be less than 

## +/- 2 percent of span Cylinder Test Runs: 1

- 

### ,.., 

## Value 2


## Zero Gas 0.0 Mid-range 4.0 High-range: 9.0

SYSTEM CALIBRATION BIAS AND DRIFT DATA: 

# EPA METHOD 3A ANALYZER CALIBRATION (C02)

Cylinder Serial No. Zero Gas XC024800B Mid-range CC86018 High-range CC28340

Analyzer Absolute Difference, Calibration Difference % 

## of Span Response 0.0 0.0 0.00% 4.0 0.0**O,OO'?~** 

## 8.9 0,1 1.11 

## %

Note: System Cal bias cannot exceed +/- 5 percent of span. Drift cannot exceed +/- 3 percent of span
Initial Values Final Values Analyzer Cal System Cal System Cal System Cal System Cal

Response, Response, Cal. Bias Response, Cal. Bias TEST RUN 1 PPM PPM % 

## of Span PPM % 

## of Span Zero Gas 0.0 0.0 0.00% 0.0 0.00% Upscale Gas 4.0 4.0 0.00% 4.0 0.00% TEST RUN 2 Zero Gas 0.0 0.0 0.00% 0.0 0.00% Upscale Gas 4.0 4.0 0.00% 4.0 0.00% TEST RUN 3 Zero Gas 0.0 0.0 0.00% 0.1 1.11 % Upscale Gas 4.0 4.0 0.00% 4.0 0.00% System Calibration Bias = [(System Cal. Response

- Analyzer Cal. Response) / Span] x 100 Drift 

# =[(Final System Cal. Response

- Initial System Cal Response) / Span] x 100 Drift, Percent of span 

## O.OOD/O 0.00%

0.00% 0.00%

1.11% 0.00% Certified Value 0.0 4.0 9.0



## C02

# BARR
Project Sample Loc. Date Operators Compliance Testing ine 2B Waste Gas Stack (SV049) 

## 12/8/2009**-----::T::-:A~KI-:-::D=-J** 

## KlTYL Analyzer Modell SN Analyzer Range (span) API Model 100AH 479.0 ppm

ANALYZER CALIBRATION DATA Note: Difference must be less than 

## +1- 2 percent of span Cylinder Test Runs _1_-_3_ Value
Zero Gas 0.0 Mid-range 261.9 High-range: 479.0 Upper

- range: 96.5

SYSTEM CALIBRATION BIAS AND DRIFT DATA: 

# EPA METHOD 6C ANALYZER CALIBRATION (502)

Cylinder Serial No. Zero Gas XC024800B Mid-range CC74126 High-range CC12700 Upper-range CC62345

Analyzer Absolute Difference, Calibration Difference % of Span Response 0.6 0.6 0.13% 266.0 4.1 0.86% 478.0 1.0 0.21% 96.2 0.3 0.06%

Note: System Cal bias cannot exceed 

## +1- 5 percent of span. Drift cannot exceed 

## +1- 3 percent of span
Initial Values Final Values Analyzer Cal System Cal System Cal System Cal System Cal

Response, Response, Cal. Bias Response, Cal. Bias TEST RUN 1 PPM PPM % of Span PPM % of Span Zero Gas 0.6 4.1 0.73% 3.5 0.61% Upscale Gas 266.0 255.2 -2.25% 259.8 -1.29% TEST RUN 2 Zero Gas 0.6 3.5 0.61% 2.2 0.33% Upscale Gas 266.0 259.8 -1.29% 258.9 -1.48% TEST RUN 3 Zero Gas 0.6 2.2 0.33% 4.3 0.77% Upscale Gas 266.0 258.9 -1.48% 260.3 -1.19% System Calibration Bias

- [(System Cal. Response

- Analyzer Cal. Response) 

## I Span] x 100 Drift

# =[(Final System Cal. Response -Initial System Cal Response) 

## I Span] x 100 Drift, Percent of span -0.13% 0.96%

-0.27% -0.19%

0.44% 0.29% Certified Value 0.0 261.9 479.0 96.5



## 502

## Routine Dry Gas Meter Calibration 

## Control Module: C-1 Leak checks Date: 12/04/09 Negative-- 

# BARRTechnician: MDM3 Positive-- 

## ok ok Orifice Wet Test Dry Gas Meter Wet I

## est Dry Gas

Diff Volume, Temp, of 

## Meter Volume Pressure H Ft' Inlet Outlet Temp. of 

## Ft3



## Nominal Iinitial Initial Initial Initial Initial 0.500 5522.00 72.0 71.0 74.0 736.840 Actual Final Final Final Final Final 5527.00 72.0 72.0 74.0 741.845 0.50 Total IAverage Average Average Total 5.00 72.0 71.5 74.0 5.005 71.8 Nominal Initial Initial Initial Initial Initial

1.000 5514.00 72.0 71.0 75.0 728.830 Actual Final Final Final Final Final 5521.00 72.0 71.0 74.0 735.835 1.00 Total Average Average Average Total 7.00 72.0 71.0 74.5 7.005 71.5 Tm Nominal Initial Initial Initial Initial Initial 2.000 5508.00 71.0 71.0 75.0 722.825 Actual !Final Final Final Final Final 

# I 5513.00 72.0 71.0 75.0 727.830 2.00 Total Average Average Average IT( 

## tI 5.00 71.5 71.0 75.0 5.005 71.3 Tm ['.lominal Initial 

# I Initial Initial Initial Initial 3.000 5528.00 

# I 72.0 72.0 74.0 742.845 Actual Final Final 

# I Final Final Final 5540.00 74.0 73.0 73.5 754.875 3.00 Total Average Average Average Total 12.00 73.0 72.5 73.8 12.030 72.8 Tm Nominal Initial Initial Initial Initial Initial 4.000 5543.00 74.0 72.0 73.5 757.890 Actual Final Final Final Final Final 5555.00 74.0 73.0 75.0 769.955 4.00 Total Average Average Average Total 12.00 74.0 72.5 , 

## 74.3 12.065 73.3 Tm

Control Module 1 Barometric Press.

-- >5 W.C. Previous Y

-- >15 in.Hg Previous Delta H

-- Elapsed Meter Time of Coefficient Cal. Point 

## Y

Minutes SEC



## I? 32.03 Minutes 12.53 0.9935

Minutes SEC

12.0 33.92
12.57 0.9912

Minutes SEC 6 28.13

6.47 0.9870

Minutes 

# I SEC

12.0 38.56

12.64 0.9882

Minutes SEC 11.0 4.54
11.08 0.9829 Average 0.9886 

## 29.22 0.9907 1.9199 Orifice Coefficien dH@

1.8288

1.8808

1.9576

1.9327

1.9815 1.9163Cliffs Natural Resources Inc. United Taconite. LLC Forbes, Minnesota Barr Engineering Co.

Emission Measurement Center (EMC) Approved Alternate Method (ALT-009) Alternative Method 5 Post-Test Calibration TEST 1 Line 1 Pellet Cooler Exhaust (SV047) Input Data Symbol Units Run 1 Run 2 Tesl date 12/16/2009 12.'16/2009 Test period 819

- 933 1019

- 1126 Total run time min 60 60

,otal sample volume measured by dry gas meter 

## v'" acf 33.1 33.0 Absolute average dry gas meter temp 

## OF 36.8 43.5 Absolute average dry gas meter temp


### . 

# '"" 496.5 503.1 Barometric pressure inches Hg 29.0 29.0 Conversion factor (29.92/528)(0.75)2 (in Hg' 

### 'R) clm" 0.0319 0.0319 Average orifice meter differential 1.06

• 1.05 Orifice meter calibration coefficient 1.92 1.92 Dry molecular weight of stack gas Ib/lb-mole 28.84 28.84 Dry molecular weight of air Ib/lb-mole 29.00 29.00**Spe~iiic** gravity 

### 0; mercury Dimensionless 13.60 13.60 Dry gas meter calibration check value Dimensionless 1.0006 1.0042 Dry gas meter calibration factor y Dimensionless 0.9886 0.9886 January 20. 2010

Run 3 12/16/2009 1156

- 1302 60 32.3 49.0

29.0 0.0319

1.00 1.92 28.84 29.00 13.60 1.0074 0.9886
Average of Yq,'s from test run series 1.0041

. Dry gas meter calibration factor 

### 0.9886 

## Y 

# =_t_ /

__ 

## 0_._0_3_1_9_._T';:11c...:

___ 

## 2_9_ e

# (-1Ilhav." )

# :==

r:o-:-'-'-d::"·ff':-----b'-"-'t=.:==.:..:.::.='-Y-, --d-Y----i-..::.:.::;;:.;:-=-+---4 qc 

## \I,,: ' A I. 

## /1,1 ", /e I erence e ween average qa S an -1.57% 

# \'!lJJ ( P , U,1I, " (must be within + 5%) 

### - : rs;. Ii'

### 1_~).6Cliffs Natural Resources Inc. United Taconite, LLC. Forbes, Minnesota Barr Engineering Co.

Emission Measurement Center (EMC) Approved Alternate Method (ALT-009) Alternative Method 5 Post-Test Calibraiion TEST 1 Line 2A Waste Gas Stack (SV048) Inout Data Symbol Units Run 1 Run 2 Test date 

# - 12/10/2009 ! 12/10/2009 Test period



## - - 1102-1209 1239

- 1345 ITotal run time t min 60 

### ! 60 Total sample volume measured by dry gas meter 

## Vm act 38.6 39.0 Absolute average dry gas meier iemp Tm 

### cF 45.4 

### ! 47.3 Absolute average dry gas meter temp Tm 

### , OR 505.0 

### : 507.0 Barometric pressure 

### , Po inches Hg 28.3 ! 28.3 Conversion factor (29.921528)(0.75)2 

# --- ; (in Hg!'R) c!m2 ; 0.0319 ! 0.0319 .l\verage orifice meter differential iI h.'9 in. H2O 1.40 1.44 Orifice meter calibration coefficient 6 H" in. H2O 

### : 1.92 i 1.92 Dry mOlecular weight of stack gas Me Ib/lb-mole 29.04 29.04

. Dry molecular weight of air



## --- Ib/lb-mole 29.00 29.00 Specific gravity of mercury 

# --- Dimensionless, 13.60 13.60 IDry gas meter calibration check value 

### Yqa Dimensionless 1.0000 1.0069 Dry gas meter calibration factor 

### Y Dimensionless 0.9886 0.9886 : Average of Yqo's from test run series 1.0022 r-D_ry"-"'g_as_m_e_te_r_c;..:a""li

__ b

__

ra

__ ti..:.o:..:n""fa"'c:..:to;:..;r

_______ 

### -+

__ 0._9

__ 8_8_6-1,..----1Y nc % difference between average 

### Yqo'S and Y -1.37% (must be within

... 5%) January 20.2010

Run 3 12/10/2009 1413

- 1519 60 39.1 49.2 508.8 28.3 0.0319



### , 1.43 1.92 29.04 29.00 13.60 0.9995 0.9886Cliffs Natural Resources Inc. United Taconite, LLC Forbes, Minnesota Barr ::ngineering Co.

::mission Measurement Center (EMC) Approved Allernate Method (ALT-009) Alternative Method 5 Post-Test Calibration TEST 1 Line 2B Waste Gas Slack (SV049) Input Data Symbol Units Run 1 Run 2 ITest date 12/8/2009 

### 12/8/2009 Test period



## - 1043

- 1153 1228

- 1336 Total run time t min 60 60 Total sample volume measured by dry gas meter 

### Vrn acf 38.3 38.4 Absolute average dry gas meter temp i". of ; 71.5 55.3 Absolute average dry gas meter temp I'm oR 531.2 515.0 Barometric pressure 

### P, inches Hg i 28.9 28.9 Conversion factor (29.92628)(0.75)2


# --- (in HgI'R) cfm2 0.0319 0.0319 Average orifice meter differential "

### ha·.'~ in. H2O 1.35 1.38 Orifice meter calibration coefficient ::; H", in. H2O 1.92 1.92 Dry molecular weight of stacf'. gas 

### Me Ib/lb-mole 29.00 29.01 Dry molecular weight 

### 0; air 

# --- Ib/lb-mole 29.00 29.00 Spe:::ific gravity of mercury 

# --- Dimensionless 13.60 13.60 Dry gas meter calibration check value Yea Dimensionless 1.0080 0.9979 Dry gas meter calibration factor Y , Dimensionless 0.9886 0.9886 January 20, 2010

Run 3 

### 12/8/2009 1428

- 1553 60 38.5 53.5 513.1 28.9 0.0319

1.39 1.92 29.01 29.00 13.60 0.9980 0.9886
Average of Yq;S from test run series 1.0015 

# I t 

## 0.0319

. Till 

## 29

. i.'

. 

## c--**f"D::..;I)..I..'-,gl.:ia=s:..:m.:..:.:::.et:..:e:..:r.:::c.:::a:.::lib::.:r.:::ac::ti:::;on:.:...:;fa:::c:..:to:::;r~**____ ___

### +--=0.:.:.9:.:8:.:8:.:6~+---lYqc: 

# =-- t 

### .61 e 

### ('V .6.ll(H.,r:)

### ~ % difference between averageYq;s and Y -1.30% 

### I'/!; 

# \1 AU 

### (P , I In:·p 

## !if" 1- I 

### un@.b-;--1--:<-.-6- (must be within + 5%) _, 

### -



## .Cliffs Natural Resources Inc. United Taconite. LLC Forbes, Minnesota

Emission Measurement Center (EMe) Approved Alternate**r,~ethod** (ALT-009) Alternative Method 5 Post-Test Calibration TEST 1 Line 1 Kiln Cooler New (SV116) Input Data Symbol Units 

### , Run 1 Barr t:ngineering Co. January 20.2010

Run 2 Run 3 Test date



## - i 12/15/2009 12/15/2009 12 115/2009 ITest period



## - - 823

- 1032 1100

- 1428 1451-1654 Total run time t min 120 120 120 Total sample volume measured by dry gas meter VITo aci 

### , 70.9 70.9 70.3 Absolute average dry gas meter temp Tm i 

### OF 36.3 39.4
, 43.0 Absolute average dry gas meter 1emp T 

### , OR 496.0 499.0 502.7 'rr. Barometric pressure Po inches Hg 28.9 28.9 28.9 ConverSion factor (29.92/528)(0.75)2


# --- (in Hg'"R) cfm2 0.0319 0.0319 0.0319 IAverage oriiice meter differential t:. ha," in. H:O ! 1.23 1.22 1.20 Oriiice meter calibration coefficient t:. H" in. H2O 1.92 1.92 1.92 Dry molecular weight of stack gas 

### Me Ib/lb-mole 28.84 28.84 

# , 28.84 Dry molecular weight oi air



## --- Ib/lb-mole 29.00 29.00 29.00 Specific gravity oi mercury 

# --- Dimensionless 13.60 13.60 13.60 Dry gas meter calibration check value Yqa Dimensionless 1.0024 1.0047 1.0070 Dry gas meter calibration factor Y Dimensionless 0.9886 0.9886 0.9886
Average of Yqa's from test run series 1.0047 

# I J 

# I I 

### t 

## 0.0319

.

# 7" 29 

# ·-t Dry gas meter calibration factor 0.9886 

# IYq" - - I> !! 

## h'

- I 

### (-Vi.). 

# q., )! % difference between average Yqa'S and Y -1.63% 

## V, 

# ! i.).hal''' 

## M i IH 

# \,!:J-l (P -'- -' .- (. 

# -I ! @ . b ' 

## 13.6 i-- (must be within + 5%) I



### ,

# THERMOCOUPLE CALIBRATION 

# BARR

THERMOCOUPLE ID C-1-1 Cal Date: 12/2212008 

## Meter In CALIBRATION TECHNICIAN: BJM REFERENCE STANDARDS TRACEABILITY DATE LABORATORY
Hart Scientific 91 03-A 

### sIn A 1B289 Report No. A 1B0718 12/26/2007 Hart Scientific Hart Scientific 9140 

## sIn A 1B086 Report No. A 1B2024 12/26/2007 Hart Scientific 

## Temperature Calibration Points 20 70 150 Reference Deg F (To) 20 70 150 Probe Temp (deg F) 18 69.7 147.2 Reference Temp (deg R) deg F + 460 480 530 610 Probe Temp (deg R), deg F + 460 478 529.7 607.2 Difference (degrees) 2 0.3 2.8 

### % Diff Abs. T 0.4% 0.1% 0.5%

1700 

# THERMOCOUPLE CALIBRATION

1600

a: 

### 1500 r;;, 

# " 1400 ." ui c: 

### 1300**~** <:: c: 

### 1200 UJ "- :;; 

### 1100 UJrUJ 

### , ...J 

### 1000 : Co 

### i :0

0 tl 

### 900**,~** c: 

### 800 !!! ;:: 

### 700 600 500 400400 500 600 700 ---e--**Calibra~ion** Curve - Unit Under Test



### 800 900 1000 1100 1200 1300 1400 1500 1600 1700 

## I REFERENCE TEMPERATURE, deg.R 

### FAHRENHEIT CALIBRATION RANGE -20 516

Technician signature 

# 13£:'.<**.d;;t~/** QA 

### signature 

# -r' -:::)**--~ ~---~--**  

# THERMOCOUPLE CALIBRATION 

# BARR

THERMOCOUPLE ID 

# C-1-0 Cal Date: 1212212008 

## Meter Out CALIBRATION TECHNICIAN: BJM REFERENCE STANDARDS TRACEABILITY DATE LABORATORY
Hart Scientific 91 03-A sIn Ai B289 Report No. Ai B0718 12/26/2007 

### Hart Scientific Hart Scientific 9140 sIn Ai B086 Report No. A 1B2024 1212612007 

### Hart Scientific Temperature Calibration Points 

## 20 70 150 Reference Deg F (To) 20 70 150 Probe Temp (deg F) 20 69.6 144.3 Reference Temp (deg R) deg F + 

### 460 480 530 610 Probe Temp (deg R), deg F .;- 460 480 529.6 604.3 Difference (degrees) 0 0.4 5.7 % Diff Abs. T 0.0% 0.1% 0.9,;!;'



### 1700 

# THERMOCOUPLE CALIBRATION

a: :;, 

# " "0 ui a: ::> !- < a: ill c.. :;; ill !- ill -' c.. ::> 0 (.l 0 :;; a: !!! 

### ;:: 

### 1600 1500 1400 1300 1200 1100 1000 900 800 700 600 

## ".----_._--

..__...

--s-- Calibration Curve

- Uni: UnderTest Upper Limit of Calibration

..-. - - LOVier Limit of Calibralion 

### 500 

## +-

__**~~~**

## __________________________________ ---

___**E_xt_ra~po_la_te_d_Ca_li_br_a!_ion_C_u_~_e**______**.~~** 

### 400**~--------~----------~----~--------~----~----~--~--------------~** 

### 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 REFERENCE TEMPERATURE, deg.R FAHRENHEIT CALIBRATION RANGE -20 153

Technician Signature

# !~,~f0-.p/ QA signature '-:::" ' 

# <::.5

.......:.--\.. ",

# BARR
Pyrometer Number: 

## PYROMETER CALIBRATION

e-1 Date: 12/23/2008 

### Pyrometer Reference: eL-300-1000F Technician: BJM

Pyromeier Q 

### F Reference (OF) Reference (Oe) Reading Pass/Fail 1000 538 1001 Pass 950 510 952 Pass 900 482 901 Pass 850 454 851 Pass 800 427 800 Pass 750 399 751 Pass 700 371 701 Pass 650 343 652 Pass 600 316 601 Pass 550 288 550 Pass 500 260 499 Pass 450 232 448 Pass 400 204 399 Ipass 350 177 349 Pass 300 149 300 Pass 250 121 251 Pass 200 93 199 Pass 150 67 150 Pass 100 38 97 Pass 50 10 48 Pass 0 -18 -1 Pass -50 -46 -46 Fail Pass/Fail based on +/- 0.75% of Renkin value Unit not to be used at range in which failure occurred

Technician signiture:

# ~~~ QA signiture: .-;:--'



# ..::.> '1-' ..

### ~~.

### ------- 

# , J 

# BARR

REFERENCE STANDARDS Hart Scientific 91 03-A sIn Ai 8289 Hart Scientific 9140 sIn Ai B086 

## Temperature Calibration Points Reference Deg F (To) Probe Temp (deg F) Reference Temp (deg R) deg F + 

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

### 460 Difference (degrees) 

### % Diff Abs. T Is difference less than 1.5% at all measured 

# THERMOCOUPLE CALIBRATION

THERMOCOUPLE ID TC5-2 Cal Date: 12/1212008 

## M-5 Probe CALIBRATION TECHNICIAN: TYL TRACEABILITY DATE LABORATORY Report No. Ai B0718 12126/2007 

### Hart Scientific Report No. Ai B2024 12/26/2007 

### Hart Scientific 

## 32 212 

## 400 650 

## Ambient 32 212 400 650 70 33.6 212 399 651 69.5 492 672 860 1110 530 493.6 672 859 1111 529.5 -1.6 0 1 -1 0.5 0.3 0 /0 

### 0.0% 0.1% 0.1% 0.1%
YES 

# THERMOCOUPLE CALIBRATION 1700 1600

t:: 

### 1500 ci> 0 

### 1400 '::l ,uS '0:: 

### 1300

::J**~** t:: 

### 1200 w c. :;; 

### 1100 w !- w ...J 

### 1000 c. ::J 0 () 

### 900 0 :;; 0:: 

### 800 '!!!

i= 

### 700 600 500 400400 500**----,-.-.~"--~,------** 

## --_
...

### _--- - 

## -**--~--_._" ~**  Calibration Curve

- Unit Under Test Upper Limit of Calibration Lower Limit of Calibration Calibration Curve



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



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

# BARR

Pitot Tube Number: 

## ,-- \ 

### Length: 

# V
--=---- Function:

# ~ / Free

1. Are iace openings perpendicular to lube axis?

## ~YES ( go to 2) 

## 0 NO (go to 1a)

### ,;~s;:,:! 

# I**~~~ ------!-----~~-----t-------** 

## j--~~--: , 

## ,

2. Are face openings paralielto longitudinal axis? 

### DYES ( go to 

### 3)

# ~'fQO (go to 

### 2a)

, :; ..... fb·. 

### S-Type Pitot Tube Geometry Check Inspection Date:

# I~·- 

# ig I 

### 0

# ~ Technician:,

__ 

# ·_-_r=L-'_I_L=-

______ _

1a. If NO. is angle less lhan 10'? 

### DYES (go to 2)

# ~r :



# --**¥.:::.:tE:~-~**

# --. ! !

2n. If NO, is angle less than 5

...·?

# ~-9E~ 

# (go to 3) 

## D NO (discontinue use)



### :'"i 

# -11 --¥;?rcd---' !**~**



## D NO (discontinue use)

### ~1·--=---~-v17**~1.-----,·~,i7** L.:..,.

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### ~~::: 

## 1- 

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3. Are legs of equallenglh?

## ~YES 

# (go to 4) 

# n NO (go to 3a)

### --&----~~----~-)-----

4. Are center·lines of legs coincident?

. 

### DYES ( go to 5)

# ~'O (go to 4a)

### --~----~~----{--)-----

5. Does this pilollube pass all of the above criteria? 

## ____'iv_.::\;..,'.

3a. Ii NO, is difierence less lhan li8 inch? 

## D YES(got04) 

## D NO (discontinue use)

4a. If NO, are cenler·lines of face openings less than 1/32 inch?

# ~~ ( go to 5) 

## D NO (discontinue use)



### ArYES DNO

# THERMOCOUPLE CALIBRATION 

# BARR

THERMOCOUPLE 10 TC5-3 Cal Date: 3/4/2009 

## M-5 Probe CALIBRATION TECHNICIAN: REFERENCE STANDARDS TRACEABILITY DATE LABORATORY Hart Scientific 91 03-A 

### sIn A 1B289 Report No. A 1B0718 12/26/2007 

### Hart Scientific Hart Scientific 9140 

### sIn A 1B086 Report No. A 1B2024 12/26/2007 

### Hart Scientific Temperature Calibration Points 

## 32 212 400 650 Ambient Reference Deg F (To) 31.8 212 400 650 70 Probe Temp (deg F) 31 210 397 650 69 Reference Temp (deg R) deg F 

### + 460 491.8 672 860 1110 530 Probe Temp (deg R), deg F 

### + 460 491 670 857 1110 529 Difference (degrees) 0.8 2 3 0 1 % Diff Abs. T**0.2~~** 

### 0.3% 0.3% 0.0% 0.2% Is difference less than 1.5% at all measured YES



### 1700 

# THERMOCOUPLE CALIBRATION

1600

### t---~~==========================~------------------------~
c: 

### 1500 ::i> 

## '" 1400 "0

### we: 

### 1300 ::> I- < e: 

### 1200 w c.. :;: 

### 1100 wIW ..J 

### 1000 c.. ::> : 0

u 

### 900 0 :;: c: 

### 800 : 

### !# i i=**~** Calibration Curve

- Unit UnderTest 

### 700
-----.. Upper LImit 0; Calibration 

### 600**--~~-.** Lowar Limit of Calibration 

### 500 400400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700: REFERENCE TEMPERATURE, deg.R

Are extrapolated limits less than 1.5%? YES FAHRENHEIT CALIBRATION RANGE 

### -20 1200 If not acceptable, describe corrective action:
Technician signature QA signature

# BARR

Pitot Tube Number: 

# 5 - 

# 3

, S-Type Pitot Tube Geometry Check

Length: 

# s\ -'""---- 

# Function:

# ~Free Inspection Date: ) - '(

- CJ

## ~ Technician: MV-i

# K'C1. Are face openings perpendk:ular to tube axis?

### ~ES (go to 

### 2) 

# D NO 

### (go to 1a) / I**~::-e.-~** I r...c..",.,jl,.o'::j; I I

# "'-~**------T-----~~------i-------** I
....;:.. I 

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### 2. Are face openings parallel 

### to longitudinal axis?

### ~YES ( 

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### 3) 

# v

3. Are legs of e::juallength?

# ~ES(9ot04) D NO (go 

### to 2a)



# o NO (go 

### to 3a)

### --F----~.'t--- 

# -'(-::-)-----

4. Are center-lines of legs coincident? 

### rES( go to 

### 5) 

# 0 NO (go to 4a)

### --)jO----~~.----'E-)-----

5. Does this pitottube pass all ofthe-above criteria? 1a. If NO, is angle less than 10°? 

### DYES ( go 

### to 

### 2)

2a. If NO, is angle less than 50? 

### DYES (go to 

### 3)

.--___ .:r7**~.** 

### V DNO (discontinue use)**~ ~**  l' 

### 'I..



# __**¥~-=:::I** 

# __.**~c.:::t** ! 1 

# . .

o NO (discontinue use)



### 3a. If NO. 

### is difference less than 

### liB inch? 

# o YES(go io 4) 

# o NO (discontinue use)



### tv**.-;;----r.,..~~1**



## ___.

4a. 

### Ii NO, are center-lines offace openings less than 

### 1/32 inch? DYES ( go to 5) 

# o NO (discontinue use)



## D<-+ YES 

# o NO

# BARR EPA METHOD 5 FIELD DATA SHEET Sample Train Leal< Hate (dm Project Smpl Lac 

# tAlf\L. L "2. (;, \,U 

## 1.-.

.

# .5~t.'-fj Tesl'No. )' Metery

## O.9~1,?~ Bm.Pres

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### <'.H @**.L..'1!.L.~** 

### 01(11'-1.:1 Stal. Pres

- 

## D.S-v in 

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### 12.- 

## 'b-c:. 'i Pltot No. 

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# r -II TEST

### RUI~ 2 Stnet, Snll1Qle Train**TenlR~1** Meter Meter Telnp. IrnplJqr Inlr-!t Otlll·,t l';,T Probe;

# r~ Otlliet Te",p, T TPIllP, T Sample Sample Motor veloc.ity Orifice Train"1 Stacl< 

### ,"r**~** Meter 

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# I
Temp Box No. 

## IRlIn
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## / 

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### 11" TEST nUN 2 Meter Velocity Orifice Train Slaci< Sam Ie Train Temp, "F Meier Meter Meier Velocity Orifice Train Slacl, Sample Train Tenp, "I"

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# '2

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## Field Barometer Calibration 

# BARR Calibration to National Weather Service at Chisholm-Hibbing Airport
Station elevation at Barr Hibbing Ofiice 3128 14th Avenue East, Hibbing, MN 1460 It.

Date Technician Time Altimeter 10 Time Pressure Pressure Condition Remarks 12/2/09 

### DJK 1:53 

### 29.90 DJK 8:48 28.53 28.44 • In Calibration. As Found 12/22/09 

### DJK 12:53 30.26 DJK 13:34 28.90 28.80 In Calibration As Found

# Appendix F Cylinder Gas Certifications

# EIIII**SCOTT-M~ARRIN,** 

# INC.
6531 BOX SPRINGS BLVD. <1' 

### RIVERSIDE, CA 92507 TELEPHONE (951) 653-6780 & 

### FAX (951) 653-2430 

# Report Of Analysis EPA Protocol Gas Mixtures

BARR01 REPORT NO: 

### 54622-02 TO: 

### Barr Engineering Co Attn: Aaron Grosser 

## 7390 OHMS Lane Edina, MN 55439-2330 (952) 832-2959 REPORT DATE: 

### October 

## 29, 2008[ CUSTOMER PO NO: 

### 20080912CPJR

CYLINDER NUMBER: 

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

COMPONENT CONCENTRATION 

### (v/v) REFERENCE ANALYZER EXPIRATION REPLICATE 

## ± EPA UNCERTAINTY STANDARD MAKE, MODEL, SIN, DETECTION 

### DATE ANALYSIS DATA
Carbon dioxide 8.98 

### ± 0.09 

## % GMIS Varian Model 3400 

### 10/27/2011 10/27/2008 CYLINDER#-: Serial #- 10680 

### 8.98 

## % CC83094 Thermal Conduciivity 

### 8.98 

## % @8.09% Gas Chromatography 

### 8.98 

## % LAST CAL DATE: 

### 10124/2008 MEAN: 

### 8.98 

## % Oxygen 

### 9.02 

## ± 0.05 

## % GMIS Varian Mode! 3800 

### 10123/2011 10/23/2008 CYLINDER#-: Serial

## #- 9.03 

## % CC51181 Thermal Conductivity 9.01 % 

### @ 10.04 % Gas Chromatography 9.01 % 

### LAST CAL DATE: 

### 10/2/2008 MEAN: 9.02 

## % Nitrogen Balance

ppm

# =umole/mole 

### % 

## =mole-% The above analyses were performed in accordance with Procedure G1 ofthe 

### EPA Traceability Protocol. Report Number EPA-600/R97/121 , dated September 

### 1997. The above analyses are inva id ifthe ylinder pressure is less than 150 psig.

# ~Jj I
ANALYST:

__ 

# %1--'(

.......

. ,,-=-l-I:-F-""'---=--'---- 

### APPROVED:

__ 

## -+..:..t

# _~ ______ _ M.S.Calhoun 

## J. 

## T. Marrin
The only liability of this company for gas which fails to comply**\\~th** this analysis shall be replace ent or reanaiysis thereof by the company without extra cosI. 

### STANDARD CALIBRATION GASES IN ALUMINUM CYLINDERS

# " I 

## jUN-11-2009 15:53 

## Sent By: SCOTT-MARRIN INC.; BARR EHGIN':::'ERING 9516532430; 9528322501 P.02/02 

## Jun-11 -09 1:58PM; Page 2/2 

# ! 

# Ilaal

I j 

## , 1 

# ! l

# B~R01 

# SC'" "'""r

# -r '1\ If 

## .l\ .r::)

# 'R'T1\ 

## T T

## l\ i 

# r- \....I 1 1

## -1V 1

## J-\. 

# 1\..' 11-'\1 t 

## ! 

## 1·"'\1 '- 0 

### 6531 BOX SPRINGS BLVD. • RIVERSIDE, CA 92507 TELEPHONE:(951)6SS·S780· FAX (95i)653-2.430 

# Report Of Analysis EPA Protocol Gas Mixtures
REPORT NO: 54424·01 

## TO:

## Ba~r Engineering Co 

## Attrp: Aaron Grosser**73~** 

## OHMS Lane 

## Edina. MN 55439-2330 (9q2)

### 832~2959 REPORi DATE: 

### SeptEmbSi 12, 

### 2006;:) CUSTOMER 

### PD NO: 20080825AMMV..2

1 1 i 

## i I i 

### CYLlND!::R NUMBER: 

# CCSS01S ! CYUNDER SIZE: 150A (141 sid cu ft)



### Carbon dibxide 

# I I I 

### Oxygen 

# I
i 

# , 1 I 

## , , 

### Nitrogen 

# I

I i 

### I 

## I CONCENTRATION 

### ("Iv) REFEReNCE 

## ± EPA UNCERTAlNTY STANDARD 

### 4_00 ±O.Q1 

## %



## 20,00 :: 0.21 %

Balance 

### GMIS 

## CYLINDER#: 

## CC122661 @3.80%

GMIS 

## CYLINDER 

## #-: ALM031591 @24.S9% ANALVZER !.!AKE,l!ODEi., SIN, .tlETECTlON 

### VarJan Model 3400 Saria!;;' t0680 

### Thermal ConducliYlty Gas Chromotography LAST CAL DATE: 

### 8/13/2008 

### Varian Model 3800 Seria!# 

### Thermal Conductivity Gas**Chrornoto-~raphy** 

### l.AST CAL. OATE: 8/2512008**CYUNDE~** 

### PRESSURE: 2000 psig 

### EXPIRATION DATE


### 91912011 REPLICATE 

### ANALYSIS DATA**~f9l2008** 

### 3.99% 

## 4.00% 4.00% MEAN: 4,00% 

### 9/1112011 9/"11120D8 

## 20.000/0 20.{)1 

## % 20.00% MEAN:**.~Q_OO** 

### %



# ppmdu.l8!mole 

### %'" mole·% The analyses Willie 

### performerlln accordance wiih Procedure G1 ofthe EPA Trnceabilily ProtOCOl. Repon Number EPA-600!R97/1Z1. dated 

### September 1997. Tha aba'1analyses are inv;,l!d If tha linda! pressure is ies.;; 

### than 150 psig. 

### 1 !

..

# ANALYS~: APPROVED:

__ 

# -+.::...

___ - __ _ 1:..-: :. M.S.Calhoun 

## J. T. Marrin The oniy

## Iiat~m)' of this company for lias wflich fails to comp1y wilh Ihls anBJr.;1i shill) berepll! , ntor i'!Ian!1ym \hen;!Of byiha COmpal\yWithout extr<! coaL 

# I STANDARD CALIBRATION GASES IN ALUMINUM CYLlNDERS 

# ! TOTAL P.02

# alill SCOTT-I'v'IARRIN, INC.
6531 BOX SPRINGS BLVD. • RIVERSIDE, CA 

### 92507 TELEPHONE (951) 653-6780 e 

### FAX (951) 653-2430 

# Report Of Analysis EPA Protocol Gas Mixtures

BARR01 TO: 

### Barr Engineering Co 

### Attn Aaron Aamold 7390 OHMS Lane Edina, MN 55439-2330 (952) 832-2959 REPORT NO: 56059-02 REPORT DATE: August 13, 2009C CUSTOMER PO NO: 

### 20090730AAGA

CYLINDER NUMBER: 

# CC62345 CYLINDER SIZE: 150,". (134 

### std CL: 

### Tt) CYLINDER PRESSURE: 1900 psig

COMPONENT

Sulfur dioxide CONCENTRATION 

### (vlv) REFERENCE 

## ± EPA UNCERTAINTY STANDARD ANALYZER EXPIRATION MAKE, MODEL, SIN, DETECTION 

### DATE
96.5 

## ± 0.5 ppm GMIS BovarM! Res Mode! 922M 8/4/2011 

### CYLINDER 

### f..: Serial 

### f.. 9228379-1 ALM003672 Continuous 

### @ 116.9 ppmv UV Photometry REPLICATE ANALYSIS DATA
8/4/2009 96.5 

### ppm 96.5 

### ppm 96.6 

### ppm LAST CAL DATE: 

### 7/20/2009 MEAN: 96.5 

### ppm Niirogen Balance

ppm 

# =umolelmole %

# =mole-% The above analyses were performed in accordance with Procedure G1 of the EPA Traceability Protocol, Report Number EPA-600/R97i121, dated September 1997. The above analyses are invalid ifthe cylinder pressure is less than 150 psig.



### ANALYST:

# f~ M.J.Monson (/ d

# Af-;'- APPROVED:

____

## ~~V~L~----·------------ J. T. Marrin
The only liability of this company for 

### gas which fails to comply with this analysis shall be**rep:a~e** , ent or reanalysis thereof by the company without eXlra cost. 

### STANDARD CALIBRATION GASES IN ALUMINUM CYLINDERS

### '3523J22E.D1 

## F'

. lJ 

### 1/02 

## [lCT-17-

## 2DD:::: 1

## E,: 

## JE: sent 

## By: SCOTT-MARRIN INC.; BRRF:**a~G** 

## I['lEER It'iG 

## 19516532.130 j 

## Oct-17-08 2:35PM; Page 1/2 

# IIIII SCOTT-MARRIN, INC.
653 1 BOX SPRJNGSBLVD. • RIVERSfDE, CA92507 TELEPHONE (951) 

## 653" 6780**~** 

### FAX 

## (951) 653

- 2430

I

# ! Report Of AnaJysis 

# EPA Protocol Gas Mixtures i Bf;RR01 TO: Bim Engineering 

## Co 

## Atn: Pete 

## Rossmiller 7 90 OHMS Lane REPORT NO: 54050-006 REPORT DATE: 

## July 15, 2008:J CUSTOMER 

## PO NO: 20080519AAGA E ina, MN 55439-2330 (%2) 832·2634

I

# I i CYLlNdER NUMBER: 

# CC74126 I CYUNDERSIZE: 150A (141 sId CU 

### ft)
I 

## COM!!,ONENT I I 

### Sulfur diq,ads



## , Nitrogen \



## i i 

# I I 

# i 1 

# j I 

# I \ 

### 1 

## , 

# i I 

### CONCENTRATION 

### (v/v) REFERENCE ± 

### EPA UNCERTAINTY STANDARD


### 261.9 

## ± 1.4 ppm

Balance 

### GMIS CYUNDER#; CC37810 

### @ 

## 287,7 ppmv 

# ANALYZER MAKE, MODEL, SfN, OETfiCllQN 

## Boverf\N Res Model 922M Serial 

### # 9228379-1 

## Continuous UV Photometry LAST CAL DATE: 7111/2008 

### CYLINDER PRESSURE: 2000 

### psig EXPIRATION 

### DATe REPLICATE ANALYSIS DATA 

### 7/14/2010 6126120Q8 7!1412008**26~.7** 

### ppm 

### 261.4 ppm 

### 262.5 ppm 

### 261.9 ppm 

### 262.4ppm 262,0 ppm 

### MEAN: 262.2 ppm 26U3 ppm

ppm !:

# um~eJmOle % ;;;

# mol~% . Th@ above 4naIY,9$9 were parte/mea in accord.mce with Procedul'!l G10fthe 

### EPA Traceability Protocol, Report 

### Number EPA·500IR97/121, dated 

### September 1997.

. The above**~nalyses** are invalki If the cylinder pressure Is less than 150psig. 

# !

# ~' :

. .**~** 

### ANALYSTj

# f1:::~~ APPROVED: ---J:...!'

.. _._. _____ _ 

# 1>:M:J.Monson 

# 7 J, 

# r. Marrin

. Tile only

# IIsbllj~.cif**thJ~** ¢::)n'lpany

### tor g;\S which

# l~ils to CDrt'lp/y

# ,,~th**ml~ ~nalY'J.l$**  shallbernpl<lO<ln<em or

# rean~lysls !hereof

### by the company Wllhout IlXlfa cost 

# ! STANDARD CALIBRATION 

### GASES IN ALUMINUM CYLINDERS 

## \

# 51111

BARRO: TO: 

### Barr Engineering Co Attn: Pete Rossmiller 

## 7390 OHMS Lane Edina, MN 

## 55439-2330 (952) 832-2634 

# SCOTT-tv'IARRIN, INC.
6531 BOX SPRINGS BLVD. 0 

### RIVERSIDE, CA 92507 TELEPHONE (951) 653

- 6780 '" FAX (95

# n 653

-2430 

# Report Of Analysis EPA Protocol Gas Mixtures

REPORT NO: 53586-04 REPORT DATE: 

### April 24, 2008:..: CUSTOMER PO NO: 20080226A.A.GA

CYLINDER 

### NUMSER: 

# CCt2700 CYLINDER SIZE: 

### 'T5GA (:4i std ell 

## ttl CYLINDER**;:>RESS~J~{E:** 

### 2000 

### f)sig

COMPONENT

Sulfur dioxide



### Nitrogen CONCENTRATION 

### (v/v) REFERENCE ANALYZER EXPIRATION 

## ± EPA UNCERTAINTY STANDARD MAKE, MODEL,SIN,DETECTION 

### DATE


### 479 ± 

### 2 ppm

Balance GMIS BovarM! Res Mode! 

### 922rv1 CYLINDER 

### #: Serial 

### '# 9228379-1 

### AAL11136 

### @ 566 ppmv Continuous UV Photometry LAST CAL DATE: 

### ·3/3/2008 

### 4/2/2010

MEAN:

ppm

# = umolefmole 

### %

# = mole-% 

### REPLICATE ANALYSIS DATA
3/2512008 

### 4/?/2008 477 ppm 479 ppm 479 ppm 479 ppm 479 ppm 480 ppm 478 ppm 479 ppm

The abOVe analyses were performed in accordance with Procedure G1 of the EPA Traceability Protocol, Report Number EPA-600/R971121, dated September 1997. T;he ab9ve analyses are invalid ifthe cylinder pressure is less than 

### 150 psig.



### ANALYST:

# ~ APPROVED:

____**-+~**

# ______________ __ M.J.Monson 

## J. T. 

## Marrin
The only liability of this company for gas INhich fails to comply with this analysis shall be replace em or reanalysis thereof by the company without extra CDS

.. 

### STANDARD CALIBRATION GASES IN ALUMINUM CYLINDERS

# Appendix G
Visible Emissions Evaluator Certification

# r Engineering, Inc.**~\'-"** 

# 5 0 

# Iu 

## f ion 5 

# f0,. 

## a 

# C I) (] n 

# gin 9 

# E n 

# vir 0 11 

## rn e n f


# Certification of Visible Opacity Reading


# Tom Leier

qualified to conduct EPA Method 9 

# Tests for visible opacity in 

# accordance with the mej-hods esfablishedfor such quolificoUon in 

# 40**CFf~** 

# Port 

# 60AppendixA.

Certification Date: October 8, 2009 Expiration Date: April 8, 2010

AeroMet Instructor: 

# WO-.t..fTUL-.**R~** Wayne Redden <t: J:tVI IJJ 

# u:: j::: 

## n: IJJ 

# u 

# 0 I-

## ~ (1) 

## 0 

# 'ro -I 

# !!: E n: LU 

### 0 LIJ 

### f- 

## 2: (5 

## 2: IJJ

### tIoU 

# =E 0 !Y. IoU 

### <t 0, '0 

## o -:f: CJ lLI '1) ", ··_1 

## "'2 CD**..;~** C" "'t U" V)

### ;~ iri (") 

### ':; ILl**~** ',0 

### Cl Q: V) '0. '0 

# ",I lLJ 

## :::-J 

## lij ('J 

# if**~** <.( '0 

# i% Lij

### ,~ (') t" 1,1,.1 a,: \J t.{) UV)C 

### o 2:

### ~ 0 V) 

## 0 o. 

### U 

### o </) 

### -<t: '0 V) 0 (J) ('0, til Q) :;::: '0 0 

### c:

### ~~ 

# LQ "t: '-

# ~ 0 '- 0**~** 

# g CL (/) ill 0- 0 i:j ::> V) "'I' (l) 

## 0 0 

## -:Jg ::::J



### ..c (/) 

## ,:.:: !!!..

L Ql 0_

# Appendix H
Process Operating Data

### Form ST-05



## Minnesota

Pollution

Control Agency 

# Operating Data Summary For Process Sources

Minnesota Pollution Control Agency 520 Lafayette Rd. N. Saint Paul, MN 55155-4194 (651)-296-6300 6/9/06
Test Date(s):**...:;1.;;,2/;.,,;1..;;.0;.,;;12..;;.0..;;,,09~**________ _ 

### Process EquipmentNumberlldentification:**...:S;...V;...0;...4.:..;8~**

### _____ _ Company Name: United Taconite, 

### LLC. Equipment 

## & Operating Data I. Process Equipment Description: 

## Line 2 Pellet Induration A side 2. Were the process and control equipment operated consistent with normal procedures? YES: Ifno, explain:
3. Include copy ofproduction records or instrumentation which indicates rate ofproduction or operation ofthe equipment, i.e. units per hour, pounds per hour, pressure, air flow, etc. 4. Date(s) and procedure(s) oflast maintenance/cleaning within 6 months: DRemains unchanged from info. provided in test plan Between 12/3 

### and 12/13/08 

### Sandblasting offans, cleaned and replaced water nozzles, cleaned ducting, cleaned drying zone manifolds, 5. Process rate (amount ofraw material or finished product per hour, wet or dry basis) while combusting (list fuel t)'Pe(s) and ratios as appropriate

Process Parameter: listtype and units 

## I Run 1 

# ! Run 2 

## i Run 3 Greenball Feed, 

### LTPH I 

### 647 647 ! 

### 648 : 

### Fired Pellets, 

### LTPH 527 526 i 

### 527 

# , Fuel Coal, TPH-wet 10.92 10.8I 10.72 Coal BTU content/lb, wet 14058 14058 14058 Mbtu!hr

. 

### 304 , 

### 301 307 1 

### Averae:e 647 527 10.82 14058 304

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 ofAPC equipment and parameters generally monitored. Monitor as in test plan and/or approval letter

. • Scrubber (list type ofscrubber):**~P** 

### (in. w.c.) and feed rate (gpm and psig) • Baghouse, Cyclone, and Multi-clone: tlP (in. w.c.)
• Catalytic Incinerator :(OFin ,OFou,) 

### and Thermal Incinerator: (OFtemoerature) 

### • ESP: Number and identity ofoperating field(s) APC and parameter monitored 

## I Run 1 

### i Run 2 

## i Run 3 Averae:e Delta P 10.67 

### i 10.73 i 

### 10.7 10.7 Scrubber Flow Rate, GPM i 

### 2766 

## I 2769 2770 2768 1 

## i
1 

## I i 

### List pollutant 

## & averaging basis.--should reflect permit ! 

### Run 1 

# I Run 2 ! 

### Run 3 Average Continuous Opacity Monitor(list hourly average) 1 I i 

## I 1 

### , 

### JMonitor (list averaging basis): I 1 

## I , , I I 

### IMonitor (list averaging basis): 

## I i 

### ! 

### , 1 

### Abbreviations: APC-air pollution control Ibs.-pounds gpm.-gallons per minute psig-pressure per square inch gauge in. w.c.-inches ofwater column AP- pressure drop

Note: This form provides only a summary ofthe operating conditions during the performance test. Additional and more detailed records are required to meet the requirements ofMinn. R. 70I7.2035, subp. 3. This form is to be submitted as part ofthe perfo
aq-f6-ST05 Form ST-05, Page 1 of 1

## Run 1: Run 2: Run 3:

start

12/10/09 11:02 12/10/09 11:17 12/10/09 11:32 12/10/09 11:47 12/10/09 12:02 end 11:02 12:39 14:13

12/10/0911:17 12/10/09 11:32 12/10/09 11:47 12/10/09 12:02 12/10/09 12:17 Average

start end 12/10/09 12:39 12/10/09 12:54 12/10/09 12:54 12/10/09 13:09 12/10/0913:09 12/10/09 13:24 12/10/09 13:24 12/10/09 13:39 12/10/09 13:39 12/10/0913:54 Average

start end 12/10/09 14:13 12/10/09 14:28 12/10/09 14:28 12/10/09 14:43 12/10/09 14:43 12/10/09 14:58 12/10/09 14:58 12/10/09 15:13 12/10/09 15:13 12/10/09 15:28 Average 12:09 13:45 15:19

Line 2A dP

10.58 10.65 10.70 10.71 10.70

10.67

Line 2A dP

10.73 10.76 10.73 10.71 10.71

10.73

Line 2A dP

10.82 10.69 10.75 10.64 10.59

10.70 L2AWG Flow 2 2764.79 2761.44 2759.41 2771.22 2771.46

2765.66

L2A WG Flow 2 2765.41 2766.28 2771.45 2769.47 2770.83

2768.69

L2AWG Flow 2 2112.84 

## 2770.25 2767.11 2766.34 2771.44

2769.60 Greenball Rate TPH 643.38 647.99 645.49 648.21 649.52

646.92

Greenball Rate TPH 645.00 651.37 644.83 646.57 648.77

647.31

Greenball Rate TPH 646.83 642.95 654.47 643.34 653.12

648.14 Fired Pellet TPH 523.75 527.80 526.26 526.89 527.96

526.53

Fired Pellet TPH 523.32 529.62 525.30 526.10 527.05

526.28

Fired Pellet TPH 527.10 524.22 530.91 520.01 531.47

526.74

12641.72 548.1 Fuel Coal TPH

10.82 10.94 10.94 10.96 10.96

10.92

Fuel Coal TPH

10.88 10.94 10.79 10.71 10.71

10.81

Fuel Coal TPH



## 10.85 10.80 10.77 10.60 10.57

10.72

13154.4 4801356 11838.96

### Form ST-05 

# ,t:

..**z~ ~.......**  

# -- Operating Data Summary For Process Sources Minnesota

Pollution

Control Agency Minnesota Pollution Control Agency 520 Lafayette Rd. N. Saint Paul, MN 55155-4194 (651)-296-6300 6/9/06
Test Date(s): 

### 12/8/2009**~~~~~-----------------** 

### Process Equipment NumberlIdentification:..;;S;..V;..0;;..4.;,;;9

______ _ Company Name: United Taconite, LLC. Equipment 

## & Operating Data I. Process Equipment Description: 

## Line 2 Pellet Induration B side 2. Were the process and control equipment operated consistent with normal procedures? YES: NO: DIfno, explain:
3. Include copy ofproduction records or instrumentation which indicates rate ofproduction or operation ofthe equipment, i.e. units per hour, pounds per hour, pressure, air flow, etc. 4. Date(s) and procedure(s) oflast maintenance/cleaning within 6 months: DRemains unchanged from info. provided in test plan Between 12/3 and 12113/08 Sandblasting offans, cleaned and replaced water nozzles, cleaned ducting, cleaned drying zone manifolds, 5. Process rate (amount ofrawmaterial 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 

## i Run 1 

## I Run 2 ! 

### Run 3 Greenball Feed, LTPH 631 

## i 632 634 Fired Pellets, LTPH 508 513 , 

### 515 Fuel Coal, TPH wet ! 

### 9.12 i 

### 9.08 9.16 Coal Heat Content BTU/lb , 

### 14268 i 

### 14268 14268 Mbtu/hr I 

### 260 ! 

### 259 i 

### 261 Avera2e 632 512 9.12 14268.0

260

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 ofAPC equipment and parameters generally monitored. Monitor as in test plan and/or approval letter

. • Scrubber (list type ofscrubber): LlP (in. w.c.) and feed rate (gpm and psig) • Baghouse, Cyclone, and Multi-clone: LlP (in. w.c.)
• Catalytic Incinerator :(OFin ,oFout) 

### and Thermal Incinerator: (OFtemverature) 

### • ESP: Number and identity ofoperating field(s) APC and parameter monitored 

# I Run 1 

## I Run 2 ! 

### Run 3 Avera2e DeltaP ! 

### 10.05

. 

### 9.88 i 

### 9.84 9.9 Scrubber Flow Rate, GPM 2586 I 

### 2585 2584 2585 i

• i

! 

### : List pollutant 

## & averaging basis.--should reflect permit 

## I Run 1 ! 

### Run 2 I 

### Run 3 Average Continuous Opacity Monitor(list hourly average) i j I



### JMonitor (list averaging basis): 

## i I 

### IMonitor (list averaging basis): ! 

## i : Abbreviations: APC-air pollution control Ibs.-pounds gpm.-gallons per minute psig-pressure per square inch gauge in. w.c.-inches ofwatercolumn LlP- 

### pressure drop

Note: This form provides only a summary ofthe operating conditions during the performance test. Additional and more detailed records are required to meet the requirements ofMinn. R. 70I7.2035, subp. 3. This form is to be submitted as part ofthe perfo
aq-f6-ST05 Form ST-OS, Page 1 of 1

## Run 1: Run 2: Run 3:

start 12/8/09 10:43 12/8/09 10:58 12/8/09 11:13 12/8/09 11:28 12/8/09 11:43 end 10:43 12:28 14:28

12/8/09 10:58 12/8/09 11:13 12/8/09 11:28 12/8/09 11:43 12/8/09 11:58 Average

start end 12/8/09 12:28 12/8/09 12:43 12/8/09 12:43 12/8/09 12:58 12/8/09 12:58 12/8/09 13:13 12/8/0913:13 12/8/09 13:28 12/8/0913:28 12/8/09 13:43 Average

start end 12/8/09 14:28 12/8/09 14:43 12/8/09 14:43 12/8/09 14:58 12/8/09 14:58 12/8/09 15:13 12/8/09 15:13 12/8/09 15:28 12/8/09 15:28 12/8/09 15:43 12/8/09 15:43 12/8/09 15:58 Average 11:53 13:36 15:53

Line 2B dP

10.15 10.11 10.01 10.00

9.98

10.05

Line 2B dP

9.93 9.72 9.88 9.79 10.08

9.88

Line 2B dP

9.98 9.98 9.80 9.74 9.74 9.82

9.84 L2B WG Flow 1 2584.21 2582.31 2586.71 2588.74 2586.33

2585.66

L2B WG Flow 1 2585.02 2583.86 2587.59 2583.17 2587.24

2585.38

L2B WG Flow 1 2584.20 2582.44 2589.08 2583.10 2582.44 2583.77

2584.17 Greenball Fired Fuel Rate Pellet Coal TPH TPH TPH 636.31 514.67 8.95 628.36 508.57 9.21 633.45 511.77 9.33 624.65 501.32 9.14 630.14 505.51 8.96

630.58 508.37 9.12

Greenball Fired Fuel Rate Pellet Coal TPH TPH TPH 628.76 510.25 9.16 633.81 515.71 9.17 629.81 511.15 9.08 636.27 515.87 8.98 632.20 513.04 9.02

632.17 513.20 9.08

Greenball Fired Fuel Rate Pellet Coal TPH TPH TPH 633.98 514.93 8.87 631.96 513.90 9.11 632.42 513.02 9.21 635.47 514.38 9.22 634.09 514.98 9.12 637.19 516.94 9.42

634.18 514.69 9.16

# ,!.::z~ Form ST-05



# -

-- tEE 

## Minneso1:a

Pollu1:ion

Con1:rol Agency 

# OperatingData SunnnaryFor Process Sources

Minnesota Pollution Control Agency 520 Lafayette Rd. 

## K. Saint Paul, 

## IVIN 55155-4194 (651J-296-6300 6/9/06

Test Date(sJ: 

## 12i1512009 Process Equipment Numberiidentification:**...;S_\_71...;1...;6~**

### _____ _ Company Name: United Taconite. LLC. Equipment 

## & Operating Data 1.**Proces~** 

### Equipment Description: 

### Line 1 

### Kiln Cooler Discharge (New) Were the process and control equipment oper31ed consistent with normal pro:edures" YES: 

### If no. explain:

3. Include copy ofproduction records or instrumentation which indicates rate ofproduction or operation ofthe equipment. i.e. units per hOUL 

### pounds per hour. pressure. air flow. etc. 4. Datel S} 

### and pro:edure(s i 

### oflast maintenance/cleaning within 6 months: II]Remains unchanged from info. provided in test plan

5. Process rate (amount ofraw material or finished product per hour. wet or dry basisl while combusting (list fuel type(s) and ratios as appropriate

Process Parameter: list type and units Run 1 Run 2 Run 3 Average Greenball Pellets. TPH 

## 290 286 295 290 Fired Pellets, TPH 247 244 252 247.5

6 Summarize control equipment operating data documented during testing. Values reponed should reflect maximum. minimum, averages. or as approved in the test plan. (See tes: plan and approval lette(1
Examples ofAPC equipment and parameters generally monitored. Monitor as in test plan and/or approval letter.

0 

### Scrubber (list type ofscrubber): 

### M (in. w.c.) and feed rate (gpm and psig) 

# • • Catalytic Incinerator :(OFin •

### OFout

### l and Thermal Incinemtor: (OF1emmr:;:;.rur::!) 0 

### APC and parameter monitored Run 1 Delta P ,1 ) "'1" •.;..- i 

### Scrubber Flow Rate, GPM 33.5 

# i i 

## i I 

### I I 

### i 

### List pollutant 

### & averaging basis.--should reflect permit i 

### Run 1 ,I 

### Continuous Opacity Monitor(iist hourly average) i I 

### Monitor (list averaging basis): ! 

### i I 

### Monitor (list averaging basis): Abbreviations: APC-air pollution control lbs.-pounds gpm.-gallons perminute psig-pressure per square inch gauge Baghouse, Cyclone, and Multi-clone: 

### M (in. w.c.) ESP: Number and identity ofoperating fieJd(s.i Run 2 Run 3 4.22 , 

### 4.07 115.9 

# ! 115.6


## i Run 2 

# i Run 3 i 

## I 

# i in. w.c.-inches ofwater column**~P-** 

### pressure drop AYerage 4.2 88

Average

Note: This form provides only a summary ofthe operating conditions during tbe performance test. Additional and more detailed records are required to meet the requirements ofMinn. R. 7017.2035, subp. 3. This form is to be submitted as pan oftbe performance test report. aq-f6-ST05 Form ST-05, Page 1 of 1

## Run 1: 8:23 10:32 Run 2: 11:00 12:19 13:42 14:28 Run 3: 14:51 16:54

Greenball Fired Cooler New Cooler New Rate Pellets start end Flow dP TPH TPH 12/15/09 8:23 12/15/09 8:33 34.04 4.11 290.06 245.94 12/15/09 8:33 12/15/098:43 34.77 4.11 290.41 247.64 12/15/098:43 12/15/098:53 34.00 4.11 289.70 246.15 12/15/09 8:53 12/15/09 9:03 33.78 4.11 289.07 244.66 12/15/09 9:03 12/15/09 9:13 Bad Bad Bad Bad 12/15/09 9:13 12/15/09 9:23 Bad Bad Bad Bad 12/15/099:23 12/15/099:33 32.87 4.24 290.44 245.47 12/15/09 9:33 12/15/09 9:43 33.03 4.24 290.30 247.45 12/15/099:43 12/15/09 9:53 33.17 4.24 290.11 247.96 12/15/09 9:53 12/15/09 10:03 33.31 4.24 289.28 246.51 12/15/09 10:03 12/15/09 10:13 33.52 4.24 289.42 248.49 12/15/09 10:13 12/15/09 10:23 32.77 4.24 289.58 247.59 12/15/09 10:23 12/15/09 10:33 33.02 4.24 289.35 246.84 Average 33.48 4.20 289.79 246.79

Process data collection system unavailable during this time. No process upsets experienced while data collection system was down.

Greenball Fired Cooler New Cooler New Rate Pellets start end Flow dP TPH TPH 12/15/09 11:00 12/15/0911:10 114.74 4.24 289.97 246.52 12/15/09 11:10 12/15/09 11:20 116.60 4.24 289.02 245.61 12/15/09 11:20 12/15/09 11:30 115.52 4.24 290.51 247.25 12/15/09 11:30 12/15/09 11:40 114.74 4.24 289.58 246.92 12/15/09 11:40 12/15/09 11:50 116.32 4.24 289.87 247.48 12/15/09 11:50 12/15/09 12:00 116.90 4.24 289.02 246.76 12/15/09 12:00 12/15/09 12:10 115.13 4.24 289.46 245.80 

## ,.12/15/09 12:10 12/15/09 12:20 116:03 

# . 4.24.

.. 

## 217.11 186.65



## 12/15/09 13:42 12/15/09 13:52 115.31 4.20 295.18 252.26 12/15/09 13:52 

## 12/15/09 14:02 115.23 4.44 294.70 250.74 

## 12/15/09 14:02 12/15/0914:12 116.27 4.09 295.29 251.78 12/15/0914:12 

## 12/15109 14:22 116.40 4.07 294.53 252.22 12/15/09 14:22 12/15/09 14:32 116.82 4.07 295.32 252.22 Average 115.85 4.22 286.12 244.02

## start 

## 12/15/09 14:51 12/15/09 15:01 12/15/09 15:11 12/15/09 15:21 12/15/09 15:31 12/15/09 15:41 12/15/09 15:51 12/15/09 16:01 12/15/09 16:11 12/15/09 16:21 12/15/0916:31 12/15/09 16:41 12/15/0916:51 Cooler upset resulted in a temporary break in testing. Drop in process data reflects the upset conditions.

Greenball Fired Cooler New Cooler New Rate Pellets end Flow dP TPH TPH 

## 12/15/09 15:01 116.17 4.07 295.06 252.07 12/15/0915:11 115.65 4.07 295.33 251.97 12/15/09 15:21 115.61 4.07 294.87 251.27 12/15/09 15:31 116.38 4.07 295.39 251.81 12/15/09 15:41 115.66 4.07 295.04 252.04 12/15/09 15:51 115.45 4.07 295.33 251.93 12/15/09 16:01 116.31 4.07 294.37 249.95 12/15/0916:11 116.15 4.07 295.39 251.97 12/15/0916:21 114.57 4.07 295.83 252.56 12/15/09 16:31 114.03 4.07 295.14 251.45 12/15/09 16:41 114.66 4.07 295.89 252.84 12/15/0916:51 116.07 4.07 295.31 252.22 12/15/0917:01 115.88 4.07 294.64 250.93
Average 

## 115.58 4.07 295.20 251.77

### Form ST-05 

# OperatingData Sunlmary 

# ForProcess Sources
Minneso1:a

PoUu1:ion

Control 

## Agency I'vIinnesota Pollution Control Agency 520 Lafayette Rd. N. Saint Paul, MN 55155-4194 (6511-296-6300

Test Date(s): 

### 12116/2009 Process Equipment NumberlIdentification: SV047/EU(J41 Company Name: United Taconite. LLC. Equipment 

### & Operating Data I. 

### Proceso, Equipmem Description: 

### Line 1 Pellet Cooler Exhaust \Vere the pro:es, and control equipmem operated conslstem with normal**pro:edures~'** 

### YES If

### no. explain: 

## 6!9/06

3. Include copy ofproduction records 

### or instrumentation which indicates rate ofproduction 

### or operation of the equipment. i.c. unit, per hour. pounds per hour. pressure, air flow. etc. 4. Date\s I 

### and pro:edurc\s) oflast maintenance/cleaning within 6 months: DRemains unchanged from infG. provided in test plan Within a 60 day period. emergency patching was done to 

### SlOp leaks in the cooler. 5. Process rate (amount ofraw material or finished product per hour. wet or dry basisl whiie combusling (list fucltype(s 1

### and ratios as appropriate

Process Parameter: list type and units Run 1 Run 2 Run 3 Average Greenball Feed. TPH 

## 295 295 295 295 Fired Peliets. TPH 

# ..,-.., _J_ 

## 251 251 251

6 Summnrize control equipment operating data documented during testing. Values reponed 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 in test plan and/or approval letter. 

# • Scrubber (list type of scrubber!:**~** 

### (in, \\.C.) 

### and feed rate (gpm and psig) 

# • • Catalytic Incinerator :(OF," ."Foell) 

### and Thermal Incinerator: (OFtenmerarure) 

# • APe and parameter monitored Run 1 

# I N/A 

### , I

i i



### , , List pollutant 

### & averaging basis.--should reflect permit' Run 1 

# ! Continuous Opacity Monitor(Iist hourly average) , Monitor (list averaging basis): ! 

### Monitor (list averaging basis): : 

### Abbreyiations: APC-air pollution control lbs.-pounds gpm.-gallons per minute psig-pressure per square inch gauge Baghouse. Cyclone, and Multi-clone: ll.P (in. \\.C.I 

### ESP: Number and identity ofoperating field(s'l Run 2 

### , Run 3

I 

### !



### Run 2 

## i Run 3 

## i

, in. \\

..c.-inches ofwater column ilP- pressure drop Average

Average

Note: This form provides only a summary ofthe operating conditions during the performance test. Additional and more detailed records nre required to meet the requirements ofi\'linn. R. 70]7,2035. subp. 3. This form is 10 

### be submilled as pnrt of the perfo
aq-f6-ST05 Form ST-05, Page 1 of 1

### Line 1 Pellet Cooler Run 1: Run 2: Run 3:

start 

## 12/16/098:19 12/16/09 8:34 12/16/09 8:49 12/16/09 9:04 12/16/09 9:19 end 

## 8:19 10:19 11:56

12/16/09 8:34 12/16/09 8:49 12/16/09 9:04 12/16/09 9:19 12/16/09 9:34
Average

start end 

## 12/16/0910:19 12/16/09 10:34 12/16/09 10:34 12/16/09 10:49 12/16/09 10:49 12/16/09 11:04 12/16/09 11:04 12/16/0911:19 12/16/09 11:19 12/16/09 11:34
Average

start end 

## 12/16/09 11:56 12/16/0912:11 12/16/0912:11 12/16/09 12:26 12/16/09 12:26 12/16/09 12:41 12/16/09 12:41 12/16/09 12:56 12/16/09 12:56 12/16/0913:11
Average 

## 9:33 11:26 13:02

Greenball Rate TPH 

## 294.37 294.70 295.34 294.65 296.33

295.08

Greenball Rate TPH 

## 294.80 295.14 294.65 294.90 294.51

294.80

Greenball Rate TPH 

## 294.74 295.61 295.19 295.24 295.18

295.19 Fired Pellets

TPH 

## 252.05 251.57 251.68 251.50 253.67

252.09

Fired Pellets

TPH 

## 250.70 251.32 250.97 251.35 251.44

251.16

Fired Pellets

TPH 

## 250.76 252.09 251.02 250.80 251.42

251.22

# Appendix I
Stack Test Plan

## loms.com 

## Minnesota Pollution Control Agency 520 Lafayette Roael 

## S:.Paul.l.,.\N 55155-4194 

# Air Performance Test Form Performance Test Plan Approval



## Facility Information (please print)

Facility name: United Taconite. LLC. AO#:: Facility contact: Ms. Candice Maxwell. Environmental Engineer Address: 1200 West Hwy. 16. Forbes, iv1N 55738 Phone: Line 1 Pellet Cooler (EU041), Line 1 Kiln Cooler Discharge (SV116 new, not yet in permit), Line 2 Induration Unit(s) to be tested: Stacks 2A and 28 (EU042/SV048 & 

### SV049) Scheduled for: December 8, 2009 at your facility located in: ---,V...:..irc.;;;g",in..:.:.i::.:.a,--.

______ _ iv1innesota. 

## Test Plan

Submitted on (date): November 16, 2009 Discussed on (date): November 30, 2009 

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

# D Test plan approved without modification 

### [g] Test plan approved with the following provisions:
1. At the time of the pretest meeting, Line 1 remained down. This will affect testing schedule and may further postpone testing of Line 1 stacks. If test is iurther delayed the facility is to contact the MPCA to provide status updates and upon successful start-up to determine appropriate schedule for testing. 

## 2. February, 2007 test on SV022 will count towards schedule of GP003. Next test for Group due in 2012 on SV023.
3. SV116 to be tested for corrective action to establish new minimum operating limit fOl' Taconite NESHAP. 

## 4. Communicate the facility's intent for each stack's test with regard to applicable standards, emission results, and operating limits in the test report. 

## 5. Along with pellet processing data include combustion data as summary of operating data. At a minimum provide fuel usage rate as well as heat input. 

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


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

## Attached Forms [g] Operating Data Summary

- Combustion Sources 

### [g] Operating Data Summary

- Process Sources 

### [Zl Certifications Form 

### [Zl Performance Test Report Completeness Criteria 

# D Operating Data Summary

- Waste Combustors 

# D Operating Data Summary

- Asphalt Plants 

### [Zl Microfiche/CD-ROM Submittal Form

Note: Forms are also available at www.pca.state.mn.us/airiperformancetesLhtml



## aq-l6-08 5/1/07 Page 1012

# Approved 

# by:

Andrew Place, Pollution Control Specialist Compliance and Enforcement Unit Minnesota Pollution Control Agency Date: December 3. 2009

Please contact me at 651-757-2652 if you have any questions regarding this approval. Please be aware that enforcement action will be taken for performance test failures indicating emissions above applicable limits (excess actual emissions to the environment). Failures commonly result in assessment of a monetary penalty. Upon the first test failure, the Company should take immediate measures to minimize emissions. The measures taken should be documented, as they will become part of the record of corrective actions. Hard Copy Performance Test Reports and Microfiche or CD Copy submittals will be addressed to: Air Qualit)1 Compliance Tracking Coordinator Minnesota Pollution Control Agency 520 Lafayette Road North S1. Paul, Minnesota 55155-4194
cc: Tom Kuchinski, Barr Engineering (email) Steve Palzkill, MPCA (email)

aq-f6-08 

### 5/1/07 Page 

### 2 of2

# Test Pian For A Taconite Production Facility United Taconite, LLC FORBES, MINNESOTA

Date Test Plan created/revised: November 12, 2009 Scheduled Test Dates: December 8-15, 2009



## PART I: General Information
i Emissions facility I location 

# I United Taconite, LLC

1200 West Hwy 16 Forbes, Minnesota 55738 

# i Facility contact 

# ! i 

### Candice Maxwell ! 

### Environmental Engineer 

## I United Taconite, LLC ! 

### P.O. Box 180



## I i 

### Eveleth, Minnesota .55738

(218)744-7849 (218) 744-7635 (fax) 

## Minnesota Air Emissions Permit Number: 13700113-004 

## AQD File Number: 869A 

## Reason emissions units are to be tested: Testing company contact
Dan Kaschak Sr. Air Quality Technician Barr Engineering Company 312814tn 

### Avenue East Hibbing, MN 55746 (218)225-8635



## Testing will be performed to comply with Title V permit requirements for SV023. SV047, SV048, and SV049. The Line 1 Kiln Cooler discharge scrubber (new) (SV116) will be tesTed to re-set parametric parameters for MACT RRRRR. The Line 1 Pellet Cooler will be tested to 

## satisfy 2008 testing and 2009 since the line was unexpectedly shut down and could not be tested prior to the end of 2008. Two tests will be conducted during this mobilization on the Line 1 Pellet Cooler to satisfy both 2008 and 2009 annual testing requirements.
The table below provides the emissions units' plant nomenclature and permit identification. Stack drawings showing stack dimensions and test port orientation and locations relative to airflow disturbances are attached.

Process unit Emissions unit Stack vent 

# I Group No. nomenclature number number 7F Fine Crushing EU017 SV023 003 (Title V) Line 1 Pellet Cooler EU041 SV047


# -- Exhaust Line 1 Kiln Cooler EU039 

# ISV116 

# I-- Discharge (new) East Line 2 EU042 SV048


# -- Induration Stack 2A West Line 2 EU042 

# I SV049 

# I-- Induration Stack 28

## PART II: Testing Requirements
The following table identifies pollutants to be determined: applicable emissions limit and units, and associated regulation for each emissions unit and stack vent. ; Process unit 

## I Limitation Basis of Pollutant : nomenclature 

# ITested



# , I

7F Fine Crusher (SV023) I

I

# I Total particulate matter: less than or equal to 0.3 grains I 

## per dry standard cubic foot of I exhaust gas unless required 

# Ito further I'educe emissions to

comply with the less stringent 

## I limit of either Minn R. ,----------1
1 

## 7011.0730 or Minn R.

Line 1 Pellet 

## 7011.0735 Cooler I' 

## Exhaust 

# I Minn R. 7011.0715, subp. (SV047) 

## 1(A), subp.3. and subp 1(8)

I

I 

# I Line 2 Waste 

## I Gas Stack 

## i 2A (SV048) 

# LJ

i 

# I I

Line 2 Waste

Gas Stack 

## 28 (SV049) 

## Total particulate matter: less than or equal to 0.3 grains per dry standard cubic foot of exhaust gas unless required to further reduce emissions to comply with the less stringent limit of either Minn R. 7011 .0730 or Minn R. 7011.0735
Minn R. 7011.0610, subp. 1(A) (1) and Minn R, 7011.0715, subp 

## 1(A), subp 3 and subp 1

## (A)(2)
Sulfur Dioxide: less than or equal to 4 Ibs/million Btu heat input using 3 hour rolling average when a solid fossil fuel is burned
Minn. R. 7011.060 subp. 2(B). Testing requirement: Minn R. 7017.2020, subp. 1. Sulfur mass balance Pollutant Tested/Permit Limit

Total Particulate**Limi~** 

## to comply vvith Industrial Process Equipment Rule (I PER) Opacity: Less than or equal to 20 percent

Total CombinedParticulateLimit to comply with

Industrial Process Equipment Rule (IPER)

Opacity: Less than or equal to 20 percent each stack
Sulfur Dioxide: Less than or equal to 4 Ib/million Btu Specific Methods/Procedures Required Citation EPA Method 1-5 40 CFR Part 60 Appendix 

## A and EPA Method 202 40 CFR Part EPA 51, Appendix M 3 -test runs to collect >32 dscf
lone-hour opacity observation period 

# I EPA Method 1-5 

# ! 40 CFR Part 60 Appendix ! 

## A and OTM 028 for condensibles Three test runs to collect >32 dscf
1 one-hour opacity observation period (may need to read 2A and 28 opacity Simultaneously if steam plumes combine)
EPA Method 6C- Three one-hour runs Sulfur mass balance: Stack emissions S02,

fuel, greenball and taconite sampled and

analyzed for sulfur content. Daily composite of each material. Testing will be performed

on consecutive days for the SV048 and SV049



## 2

## Process unit nomenclature

Line 1 Kiln

CoolerDischargeNew (SV116) 

## Limitation Basis of Pollutant Tested

MACT RRRRR 40 CFR Part 63.9590 Table 1



## Part III: Operating Conditions 

# I I Pollutant

Tested/Permit Limit

Filterable particulate less than or equal to 0.008 grains per dry standard cubic foot of exhaust gas

flow for the flow weighted average

for applicable MACT group 

# I Specific 

# i Methods/Procedures ! 

## Required Citation 

# i stacks

II

# I EPA Method 1-5 

# I 40 CFR Part 60 AppendiX 

# I A II 

## Three-120 minute test runs

I 

## Process equipment description for units to be tested I Emission Unit 

## #(s) I Stack Vent # 

## Description 

# I EU017 

# I SV023 I Fine crushing of taconite ore 

# I EU041 

# I SV047 

# I Line 1 pellet cooling after induration 

# I EU039 SV116 

# I Line 1 kiin cooler discharge-new scrubber 

# I EU042 SV048, SV049 

# I Line 2 induration process waste gases



## Process Parameters to be Monitored: all units to be tested at 90 percent or greater of maximum production 

# I Emission Unit 

## #(s) 

# I Process Units Frequency 

# I Range Parameter 

## lOre Crushing I Long tons/hour 

## I EU017 

# I rate 15 minutes I 330-430

I 

## EU041 (Line 1) Greenball Feed i 

## Rate Long tons/hour 15 minutes 

# I 250 EU039 (Line 1) 

# I Fired Pellets Long tons/hour 15 minutes 210-230 Greenball feed Long Tons per 15 minutes 630 rate hour
Finished pellet Long Tons per 15 minutes -600 production rate, hour
EU042 (Line 2) Coal/coke 

# I Tons/hour 15 minutes -7.0-9.0 blend fuel input 1 sample per run Fuel sample grab composited



# -- for one analysis per day



# 3

## Control equipment 

## ID I 

## Control equipment 

# I description Monitored parameters Control device parameters recorded at minimum of 15 minute intervals during the test 

# i CEOI8, SV023

7F fine crusher 'II 

## Wet scrubber high efficiency w/out lime Scrubber water flow rate, gpm Pressure drop across scrubber, inches w.c. I SV047 

# I Line 1 Pellet cooling 

# I CE065, SV116 

# i Line 1 Kiln Cooler 

## i Discharge (new) 

## i None 

# I

, 

# I Wet scrubber high

efficiency w/out lime I 

## i Wet scrubber high none
Scrubber water flow rate, gpm Pressure drop across scrubber, inches w.c. 

# i Scrubber water flow rate, gpm 

# i CE049, SV048 

# I CE050, SV049 ! 

# I efficiency w/out lime i 

## Pressure drop across each scrubber. inches I ' I 

## w.c.



## Part IV: Test Methods All tests will be performed using the following USEPA reference test methods. 

# I Test methods

!I 

## Method 1 

# I Sample and Velocity Traverses for Stationary Sources. Once per

, J 

## location
I 

## Method 2 

# I EPA Method 2 for stack gas velocity and volumetric flow rate. 

## i One determination per EPA Method 5 test run. Method 3A I EPA Method'" or 3A to determine s'ack gas molecular weight at I ..) l I 

# I the Line 2 Waste Gas stacks All other sources are non

# I combustions sources and ambient concentrations for oxygen and 

# I carbon dioxide are expected. A portable oxygen meter will be I I 

## used to verify ambient sources ! 

## Method 4 

# IEPA Method 4 for determination of moisture content in stack gas will be performed in conjunction with EPA Method 

## 5/202 or OTM 028 testing. Method 5 EPA Method 5for the determination of filterable particulate matter. Three test runs at least 60 minutes in length obtaining >32 dscf sample volume. MACT testing will be 120 minutes Method 202 EPA Method 202 for condensible particulate matter. SV023 and SV047 EPA Sulfur Dioxide. Instrumental procedure. 3- 60 minutes sample Method 6C periods per stack Method 9 EPA Method 9 on all Title V sources. 1 hour of readings per source OTM 028 Condensible particulates determined from the 2A and 2B waste gas stacks in conjunction with the EPA Method 5



## 4

## Part V: Continuous Emissions Monitors There are no operating CEMS at these locations.



## Part VI: Other Particulate emissions will be reported in gr/dscf. Ib/hour and Ib/long ton of process feed (i.e. greenball, fired pellets or ore feed rates). EP.A 5/202 or OTM028 results will be reported as filterable, filterable plus organics and "total" including: filterable, organic condensible and aqueous phase condensibles. Filterable plus organic will be used to compare to the MN rules limits. The total represents PM1 0/PM2.5 and may be used for emission inventory purposes. MACT test results at SV116 will be reported as filterable particulate in grains/dry standard cubic foot of exhaust gas.

SV048 and SV049 waste gas stacks are scheduled to be tested on consecutive days. Sulfur dioxide will be reported as Ib/hour and Ib/fvHv1Btu. A composite fuel sample (coal/coke blend) will be analyzed for Btu content, moisture and sulfur content. Composite fuel, greenballs and fired pellets will be analyzed for sulfur content to be used in the mass balance to determine S02 removal efficiency. Sulfur mass balance will be reported as percent removal efficiency.

The test report will be submitted on or before the 45th 

## day from the last day of testing within the mobilization.


## Test Dates: December 8-15, 2009. The proposed test schedule follows

## i: Monday Tuesday \Vednesday Thursday Friday December 7, 2009 December 8. 2009 December 9. 2009 December 10, 2009 December 11, 2009 Test Test Test Test Test Line 2B Waste Gas Line 2A \\'aste Line 1 Kiln Cooler Line 1 Pellet Line 1Pellet Stack SV049 Gas Stack SV048 Discharge Cooler Discharge Cooler Discharge SV1l6 SV047 (test:2 for SV047 (test 1for 3 one- hour runs 3 one- hour runs 3 two- hour runs 2009) 2008) Particulate. S02 Particulate, S02 particulate-MACT 3 one- hour runs 3 one- hour runs lone-hour

- lone-hour

- Particulate Particulate Opacity Opacity 0700-1700 lone-hour run lone-hour run 0700-1400 0700-1400 Opacity Opacity 0700-1400 0700-1400 Setup

Setup Line 2A Waste Line 2B Waste Gas Stack Gas Stack SV049 SV048
1400-1500 1200-1600



## 5

## Monday Tuesday December 1.:1. December 15. 2009 2009 Tes! Fourth Stage Crusher #7

SV023
3 one hour runs

particulate lone-hour run Opacity


## 0700-1700

1 

### The test schedule may be modified prior to the test dates



## United Taconite and Barr Engineering contacts will make themselves available for a pretest meeting prior to November 30,2009. At the preference of the MPCA, United Taconite suggests the pretest meeting be conducted by telephone. 

## Maintenance: A description of any necessar)' work done within 30 days prior to the test and the normal maintenance schedule followed will be included in the test report. 

## Test Reports: One hard copy and one electronic copy in .pdf format on CD of the test report will be submitted to the MPCA on or before the 45 day from the last test date of the mobilization 

## Test plans and report submittals will be addressed to:
Andrew Place Performance Test Coordinator Minnesota Pollution Control Agency 520 Lafayette Road St. Paul, MN 55155-4194


## Closing Remarks If there are questions or comments about the information provided, please contact me by telephone or e-mail.

Candice Maxwell Environmental Engineer United Taconite, LLC

Attachments: Figure 1-5; SV023, SV047, SV048, SV049, SV116-Test port location drawings c: Dan Koschak-Barr Engineering Company



# 6

# Dan Koschak
From: Sent: 

## Place. Andrew (MPCA) [Andrew.Place@state.mn.us] Wednesday, December 09,20092:34 PM To: Maxwell, Candice A. 

## Cc: Subject: 

## Tom Kuchinski; Dan Koschak; Aagenes, Jason D. RE: United Taconite

- Day 2, Line 2A Stack Testing

after lon10iT()\\' e)r Y(IUr

### pruc..:~~sin~**r:J.r:.lnlel~r chdngc~** **i~~~** 

## Inc'**kn(l\~.** 

## C)thej"\Vl:.;t'**is::;u::~.** 

## in th,-' report.**ThullL~.**

P/(!(:t


## ivlinnesora Fi.J!luLit)rt Cunrrol.:'-l.gcnc:" 52U 

## 1**,Jfayertl~** 

## Fc,<1d St. PZ111L 

## JdJ\**55155-,:,P~j~** 

## Andrew.Placel(i!state.mn.us Andre··.Plac@@,?CC1.St2te.:;rln.us



## From: Maxwell, Candice A. [mailto:Candice.Maxwell@cliffsnr.com] 

# Sent: Wednesday, December 09, 2009 12:24 PfvJ To: Place, Andrew (fvJPCA) Cc: Tom Kuchinski; 'Dan Koschak'; Aagenes, Jason D. 

# Subject: United Taconite

- Day 2, Line 2A Stack Testing
Good Afternoon Andy,
As follow up to our conversation this morning, we have postponed the Line 2A stack testing until tomorrow due to unfavorable wind conditions directing the plume of2B onto the 2A testing platform. Assuming the wind changes directions and is not impeding testing on 2A, we will complete the Line 2 portion of our stack testing tomorrow (12/10). United Taconite is not anticipating any process changes within the next 24-48 hours.
Please let me know ifyou have any questions or need any additional information.
Thank you, 

# CLIFFS

P**2Ei.744.7G4~·** 

### ;::: 218.7.:1.:1.7635 

## candice.maxwell@clifisnr.com

CLIFFS NATURAL RESOURCES Uniied Taconite LLC PO Box 180, Eveleth, MN 55734



### 1

# Dan Koschak
From: Sent: 

## To: Cc: Subject: Place, Andrew (rv1PCA) [Andrew.Place@state.mn.us] Tuesday, December 08, 2009 4:19 PM Maxwell. Candice 

## A. Tom Kuchinski; Dan Koschak RE: Opacity Readings

Thai**:-..ounLi~ ~k\** ..

### \:p~uhk·. 

## if'**~':Uli ~!.ppc.ai-**  ttl

### h:,::~ii;**J!~~\·ir!;** 

## curnpliancc**i~:-';LI(:~:·** clUe' l(, til::

### ;-;l~L...

### L**p~LllTI'':_~ h;..·ill~** **L·i..Hrlt,jnc~ll L'Ui1t~lCt** **111C~** 

### anci**\\:~** 

### can**di.<_:us~** !lCl\\ LC1

### pro:.:c~·.d 

### ane**h~Uk!I::** 

### tjeL'**dat~t currcntl~**  

### collecled. ()lhc;,\,.**i:'"\~'.** 

### "l \\'il; it:Si 

## !eli,':!,_**LJr~:** 

### LCIJ11bincd 

## opacity 1:::';: 

### iri Iil:.:**r~~p:~)rL Pi~..:asc.'** **h~t\':~: ~run:**  

## nUle lh:.:: :;,ltuallun 

## \Vit!lin lh(:**ri:.~pun ~!:;**  

## \,::::?L,

lvlinncs(;Lu 

### P':JllULic;:-l 

## C(:T1Lrol_ 52U 

## LarJye[[t'**R(~Jcl** 

## St. Paul; fvl!\**55!55-4i9~** 

## Andre\\·.Place(G'state.mn.llS**~!\.ndrev·. P13cQ~c'I)~:..s~a** 

## te.111:1.

## us


## From: rvJaxwell, Candice A. [mailto:Candice.fvlaxwell@c1iffsnr.com] 

# Sent: Tuesday, December 08, 2009 4: 

# 15 PM To: Place, Andrew (MPCA) Cc: Tom Kuchinski; 'Dan Koschak' 

# Subject: Opacity Readings
Good Afternoon Andy,
I received word from Tom Kutchinski that they have been taking opacity readings from the combined plume of Line 2A, 2B, and Line 

## 1 waste gas stacks with little incident. Iwill let you know ifwe experience any further problems.
Thanks again for returning my call this afternoon. Please let me know ifyou have any questions.
Candice

CLIFFS NATURAL RESOURCES United Taconi1e LLC PO Box 180. Eveleth, fvlN 55734



# This electronic message and any attachments included with this message are for the exclusive use ofthe individual or entity to which it is intended to be addressed. This message may contain inf01mation that is 1

### b5!-7S-:-2b

### 52 

### /\nclreV;.**PIJ.Ct·!.~1~.--)r2 ~!_'.** 

### niL.**U~** 

### A++f!-rL'\\**.~!J~:-':Z:·p~~-a~.;-:"!r;.:..:£** 

## From: Maxweli, Candice 

## A. [mailto:Candice.Maxwell@cliffsnr.com] 

# Sent: Wednesday, November 18, 2009 10:30 AM 

## To: Place, Andrew (MPCA) 

## Cc: Aagenes, Jason D.; Tom Kuchinski; Dan Kaschak 

# Subject: RE: December Stack Test Plan for United Taconite
Good Morning .4noy.
Thank you for your response. \IIJe wili remove 

## S\l023 frorn the December test plan and proceed with testing 

## S\/023 prio!' to February 

## 201:::.
Would you be available f'Jovember 

## 30 at 

## 10:00 a.m. for the pt'etest rneeting-;:' Piease let me know if that wil! work into your schedule.
Thanks and have c: g!'eat daV,
CandiCe

candice.maxwell @cliffsnr.com

CLIFFS NATURAL RESOURCES United Taconite LLC



## From: Place, Andrew (MPCA) [mailto:Andrew.Piace@state.mn.us] 

# Sent: Tuesday, November 17, 2009 3:18 PM 

## To: Maxwell, Candice A. 

## Cc: Aagenes, Jason D.; Tom Kuchinski; Dan Kaschak 

# Subject: RE: December Stack Test Plan for United Taconite


## Candice. Allowing**SVU2~** 

## to 

## be tc:slc:d is 

## acceptable. 

## 1**C~!ll'l j~nd**  

## a strong 

## reason 

## for the: sLacL ordc:r in 

## rhe permit 

## either. 

## I think [he best and leasl 

## confusing way 

## to 

## handle 

## this 

## \\ould be to 

## move 

## SV022 up in the rolaLion and then

## just go 

## back to 

## [he order 

## outlined in 

## the permit. 

## So, 

## SV023 would be 

## tested no;! sometime prior to 

## February. 

## 2012. \Ve 

## can discus:; the test plan and rest ofthe 

## units to 

## be tested in a 

## couple w;:;eks. How docs that 

## sound? Aft;:;]' you :=;ee what 'works as a facility, let me know a time that you would like (0 

## do the 

## pretesl meeting. Thanks, Andy Place 

## Performance Test Coordinator Minnesota Pollution Control Agency 520 

## Lafayette 

## R.oad St. Paul. MN 55155--P94**651-75;-:~·652** 

## Andrew.Place@state,mn.us 2

# Appendix 

# J Project Participants

# Project Participants and Contact Information

Minnesota Pollution Control Agency Andrew Place

- Performance Test Coordinator



# United Taconite, LLC Jason Aagenes

- Manager, Minnesota and Canadian Environmental Affairs Candice Maxwell -Environmental Engineer

- Plant



# Barr Engineering Company Tim Russell

- Vice President/Chemical Engineer Tom Kuchinski

- Stack Testing Supervisor Dan Koschak

- Senior Air Quality Technician/Project Manager Richard Berg

- Senior Air Quality Technician Tom Leier

- Air Quality Technician



# CONTACT INFORMATION MPCA United Taconite, LLC Andrew Place Candice Maxwell Performance Test Coordinator Environmental Engineer Compliance and Enforcement P.O. Box 180 Section-Industrial Division Eveleth, MN 55734 Minnesota Pollution Control (218) 744-7849 Agency 520 Lafayette Rd. N. candice.maxwell\a>.cliffsnr.com 

## Saint Paul, Minnesota 55155 (651) 296-7169 andrew.Qlace@state.mn.us

#23691027 

# Barr Engineering Co. Dan Koschak Sr. Air Quality Technician Barr Engineering Company 3128 14th Ave East Hibbing, MN 55746 (218) 262-8635
dkoschak@barr.com