Results of the December 20-21, 2011 

Sulfuric Acid Mist, Sulfur Dioxide, and 

Particulate Matter Performance Tests at the 

United Taconite, LLC Facility Located in 

Forbes, Minnesota 

Line 1 Waste Gas Stack (SV046) 

MPCA AQD File No. 869A 

Air Emissions Permit No. 13700113-005 

Barr Project No. 23/69-1260.00 

Prepared for 

United Taconite, LLC 

Forbes, Minnesota

January 2012
i 

Results of the December 20-21, 2011 Sulfuric Acid Mist, Sulfur 

Dioxide, and Particulate Matter Performance Tests at the United 

Taconite, LLC Facility Located in Forbes, Minnesota

Table of Contents 

Report Certification...................................................................................................................................... iii

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

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

Results Summary .......................................................................................................................................... 2

Process Description ....................................................................................................................................... 3

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

Tables 

Figures 

Appendices 
23691260

ii 

List of Tables 

Table 1 Particulate Matter Test Results – Line 1 Waste Gas Stack (SV046)-Solid Fuel 

Table 2 EPA Method 8 Test Results – Line 1 Waste Gas Stack (SV046)-Solid Fuel 

Table 3 EPA Method 8 Test Results – Coal Line 1 Waste Gas Stack (SV046)-Natural Gas 

Table 4 Derivation of SAM to SO2 Ratios – Line 1 (SV046) 

 

List of Figures 

Figure 1 Test Port Locations – Line 1 Waste Gas Stack (SV046, EU040) 

Figure 2 Traverse Point Locations – Line 1 Waste Gas Stack (SV046, EU040) 

List of Appendices 

Appendix A Report Calculations and Nomenclature 

Appendix B Field Data Sheets 

Appendix C Laboratory Reports and Sample Chain of Custody 

Appendix D Calibration Data 

Appendix E Visual Emissions Certificate 

Appendix F Cylinder Gas Certifications 

Appendix G Process Operating Data 

Appendix H Stack Test Plan 

Appendix I Project Participants and Contact Information 


23691260

v 

Executive Summary 

Barr Engineering Company conducted performance tests on the Line 1 kiln (EU040) waste gas stack 

(SV046) at the United Taconite, LLC production facility located in Forbes, Minnesota. Tests were 

completed for determination of sulfuric acid mist (SAM), sulfur dioxide (SO2), total particulate matter 

(TPM), particulate matter with an aerodynamic diameter of 2.5 microns or less (PM2.5), and particulate 

matter with an aerodynamic diameter of 10 microns or less (PM10). Tests were conducted on December 

20, 2011 for SAM, SO2, and particulates while the kiln was burning solid fuel. Sulfuric acid mist and 

SO2 testing was performed again on December 21, 2011 while the kiln was firing on natural gas. The 

purpose of these tests was to determine particulate emissions and the ratio of SAM to SO2 emissions 

after construction modifications to burn solid fuel were made to EU040, as authorized by Air Emission 

Permit No. 13700113-005. The test results are summarized in the following Executive Summary 

Tables. 

Executive Summary Tables 

EPA Method 5,9 and 202 Average Test Results 

Test Date 12/20/2011 

Fuel Condition Solid Fuel

Volumetric Airflow Rate, DSCFM 292,000 

Concentration, gr/dscf 

 Dry Catch Only 0.0047 

Dry Catch Plus Organic Condensibles (TPM) 0.0050 

TPM Concentration Limit 0.0070 

PM2.5 (= PM10) 0.0094 

PM2.5 (= PM10) Limit 0.0139 

Emission Rate, lb/hr 

Dry Catch Only (Filterable) 12 

Dry Catch plus Organic Condensibles (TPM) 13 

TPM Emission Rate Limit 42 

PM2.5 (= PM10) 23 

Opacity, % (Limit 20%) 0 

 
23691260

vi 

Executive Summary Tables (Continued)

EPA Method 8 Average Test Results 

Source Line 1 Waste Stack 

Stack Vent No. SV046 

Emission Unit EU040 

Test Date 12/20/2011 

Fuel Condition Solid Fuel

Volumetric Airflow Rate, DSCFM 302,000 

Concentration, lb/dscf 

Sulfuric Acid Mist 5.6 x 10-7 

Sulfur Dioxide 1.4 x 10-5 

Emission Rate, lb/hr 

Sulfuric Acid Mist 10 

Sulfur Dioxide 258 

Percent Sulfuric Acid Mist to Sulfur Dioxide 3.9 

EPA Method 8 – Gas Condition Average Test Results 

Source Line 1 Waste Gas Stack 

Stack Vent No. SV046 

Emission Unit EU040 

Test Date 12/21/2011 

Fuel Condition Natural Gas

Volumetric Airflow Rate, DSCFM 306,000 

Concentration, lb/dscf 

Sulfuric Acid Mist 2.3 x 10-7 

Sulfur Dioxide, 2.0 x 10-6 

Emission Rates, lb/hr 

Sulfuric Acid Mist 4.2 

Sulfur Dioxide 37 

Percent Sulfuric Acid Mist to Sulfur Dioxide 11.9 
23691260 

1 

Introduction 

Barr Engineering Company conducted performance tests on the Line 1 kiln (EU040) waste gas stack 

(SV046) at the United Taconite, LLC production facility located in Forbes, Minnesota. Tests were 

completed for determination of sulfuric acid mist (SAM), sulfur dioxide (SO2), total particulate matter 

(TPM), particulate matter with an aerodynamic diameter of 2.5 microns or less (PM2.5), and particulate 

matter with an aerodynamic diameter of 10 microns or less (PM10). Tests were conducted on December 

20, 2011 for SAM, SO2, and particulates while the kiln was burning solid fuel. Sulfuric acid mist and 

SO2 testing was performed again on December 21, 2011 while the kiln was firing on natural gas. The 

purpose of these tests was to determine particulate emissions and the ratio of SAM to SO2 emissions 

after construction modifications to burn solid fuel were made to EU040, as authorized by Air Emission 

Permit No. 13700113-005. 

A test plan, dated September 8, 2011, was submitted to the Minnesota Pollution Control Agency 

(MPCA) prior to testing. The test plan was discussed in a pretest meeting held on September 19, 2011. 

Attendees of the pretest meeting were Candice Maxwell of UTAC, Tom Kuchinski of Barr Engineering 

and Andy Place of the MPCA. A test plan approval letter was provided on September 30, 2011 by 

Andy Place. Testing was initially scheduled for October 18-20, 2011, but was delayed until December 

20-21, 2011 due to issues with the coal mill resulting in the inability to burn 100% coal consistently. 

The MPCA was notified of schedule changes. Copies of the test plan, MPCA approval letter, and 

communications are provided in Appendix H. 

Dan Koschak led the Barr test team. Candice Maxwell and Lisa Weidemann of UTAC provided 

coordination between the test team and process operations. The tests were not witnessed by a 

representative of the MPCA. A list of project participants is provided in Appendix I. 

The testing consisted of three one-hour test runs for determination of SAM and SO2 concentrations and 

emission rates during both solid fuel and natural gas firing conditions. Particulate matter results were 

determined by performing three one-hour runs only during the solid fuel condition. A single one hour 

visible emissions test was conducted during the solid fuel condition. Field data, along with other 

supporting documentation, are located in the appendices. 
23691260 

2 

Results Summary 

Table 1 presents the results of the particulate matter test for Line 1 waste gas stack (SV046). This test 

was conducted simultaneously with the SAM and SO2 testing on December 20, 2011 while the kiln was 

firing on solid fuel. The total particulate matter (filterable plus organic condensables, TPM) 

concentration was 0.0050 grains per dry standard cubic foot (gr/dscf), resulting in an emission rate of 

13 lb/hr. The primary PM2.5/PM10 concentrations were determined using the combined mass of 

filterable matter, organic condensable, and inorganic condensable particulate matter from the EPA 

Method 5/202 sample train assuming all particulate is PM2.5/PM10. The results for both particulate size 

fractions of PM2.5 and PM10 were 0.0094 gr/dscf. The TPM, PM2.5, and PM10 concentrations comply 

with the respective permitted limits. One 60 minute test using EPA method 9 to determine opacity was 

performed during run one of the particulate testing runs. The test results are not summarized as all 

readings were zero percent. A copy of the field data sheet is located in Appendix B. 

Table 2 presents the results of the SAM and SO2 test on December 20, 2011 while the kiln was firing on 

solid fuel. The SAM emission rate at average was 10 pounds per hour (lb/hr), and the SO2 emission 

rate was 258 lb/hr. 

Table 3 presents the results of the SAM and SO2 test on December 21, 2011 while the kiln was firing on 

natural gas. The SAM emission rate at average was 4.2 pounds per hour (lb/hr), and the SO2 emission 

rate was 37 lb/hr. 

Table 4 provides a summary of SAM and SO2 calculated data to verify the ratios used in the permit 

application that resulted in permit 13700113-005. The ratio of SAM: A SO2 emission rate was 0.039 

during solid fuel combustion and 0.119 during natural gas combustion. The ratio of sulfur in solid fuel 

that converts to SO2 versus SAM was 98.3: 1.7 

No testing difficulties or process delays were noted during these performance tests. 

The tests were performed at or above production rates identified in the test plan while the Line 1 

furnace was firing solid fuel and natural gas. The process operating data is detailed in Appendix G, 

along with MPCA required process operating data forms and solid fuel analysis data. Solid fuel samples

were collected during each test run on December 20, 2011 by UTAC and analyzed by Twin Ports 

Testing. Results of the fuel analysis are located in Appendix G- Process Operating Data. 
23691260 

3 

Process Description 

Line 1 Waste Gas Stack (EU040) 

The Line 1 pelletizing process uses an Allis Chalmers rotary kiln (serial number B-41301), which is 

120 feet in length with an 18’ 6” diameter. The pellets pass through the kiln where they are heated to 

approximately 2,400 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 gas particulates are controlled with a Ducon venturi scrubber (222 Type VVO). 

The process rate on December 20, 2011 test while combusting solid fuel averaged 287 long tons per 

hour (LTPH) greenball feed. The process rate on December 21, 2011 test while combusting natural gas 

averaged 286 LTPH greenball feed. This satisfies the permit requirement to test at a greenball feed 

rate of greater than or equal to 250 LTPH. 

Scrubber water flow rate and scrubber pressure drop were monitored during each test run. Scrubber 

water flow on December 20, 2011 averaged 4,157 gallons per minute (gpm), and the pressure drop 

averaged 21.8 inches of water column (in. w.c.). During the natural gas fired testing on December 21,

2011, scrubber water flow averaged 4,154 gpm and pressure drop averaged 21.7 in. w.c. 

 Process parameters monitored during testing, as per the stack test plan, can be located in Appendix G. 
23691260 

4 

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 1-2. 

Location SV# Distance to 

upstream 

Disturbance, 

(diameters) 

Distance to 

downstream 

Disturbance, 

(diameters) 

Number of 

ports 

Number of 

Points 

SV046 ~8.0 2.0 4 12 

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 Methods 8 and 5/202 tests. 

Oxygen and carbon dioxide compositions of the Line 1 kiln waste gas stack was determined by 

modified EPA Method 3A. An integrated sample of dry stack gas was collected in a Tedlar bag through 

the duration of each test run. The bag samples were analyzed using a Servomex Model 1440 oxygen 

and carbon dioxide analyzer calibrated with EPA Protocol gases. Copies of calibration gas 

certifications are located in Appendix F. 

Stack gas moisture content was determined by the performance of EPA Method 4, in conjunction with 

the EPA Methods 8 and M5/202 sample trains. 

SAM and SO2 concentrations were determined with EPA Method 8. The sample train configuration, 

sample and sample recovery was completed per the method. The hydrogen peroxide reagent was 

prepared fresh daily on-site. Sample trains were purged with ambient air after the test runs. Samples 

were analyzed by Enthalpy Analytical using the titration method. 

Visible emissions were determined by a certified observer following EPA Method 9. A copy of the 

field data sheet is located in Appendix B. The observer opacity certification is located in Appendix E. 

Particulate concentrations were determined using EPA Method 5/202(post January 1, 2011). The 

sample train configuration, sample and sample recovery was completed as method procedure states. 

The fractions of the EPA Method 5/202 sample train were combined and used to represent PM2.5 and 

PM10. A copy of the sample chain of custodies and laboratory reports are located in Appendix C. 

EPA Methods 1-4, 8, 9, and 5 can be found in 40 CFR Part 60, Appendix A. EPA Method 202 is 

located in 40 CFR Part 51 Appendix M. 
Tables 
Cliffs Natural Resources Barr Engineering Co.

United Taconite, LLC January 25, 2012

Forbes, Minnesota

TABLE 1

PARTICULATE MATTER TEST RESULTS

Line 1 Waste Gas Stack (SV046)

Parameter Run 1 Run 2 Run 3 Average

Scrubber - Pressure Drop, in. H2O 21.9 22 21.4 21.8

Scrubber - Water Flow Rate, gal/min 4161 4154 4156 4157

Test Date 12/20/2011 12/20/2011 12/20/2011 ---

Test Period 1353 - 1501 1548 - 1700 1742 - 1851 ---

Test Duration, min. 60 60 60 60

Avg. Stack Temperature, deg.F 138 138 137 138

Avg. Moisture Content, %V/V 13.1 12.7 13.2 13.0

Particulate Loading, g

Dry Catch 0.0124 0.0096 0.0122 0.0114

Organic Condensibles 0.0013 0.0003 0.0008 0.0008

Condensibles Organic and Inorganic 0.0136 0.0098 0.0105 0.0113

Total 0.0261 0.0194 0.0228 0.0227

Air Flow Rate

acfm 401,000 396,000 402,000 400,000

scfm 337,000 332,000 338,000 336,000

Fuel Condition: Solid Fuel

scfm 337,000 332,000 338,000 336,000

dscfm 293,000 290,000 293,000 292,000

Sample Volume

acf 38.48 38.00 38.95 38.48

dscf 37.70 36.83 37.63 37.39

Isokinetic Variation, % 98.8 97.4 98.5 98.2

Particulate Concentration, gr/dscf

 Dry Catch Only (Filterable) 0.0051 0.0040 0.0050 0.0047

Dry Catch + Organic Condensibles (TPM) 0.0056 0.0041 0.0053 0.0050

Total- PM2.5/PM10 0.0107 0.0081 0.0093 0.0094

Particulate Emissions Rate, lb/hr

 Dry Catch Only (Filterable) 13 10 13 12

Dry Catch + Organic Condensibles (TPM) 14 10 13 13

Total- PM2.5/PM10 27 20 23 23

Process Rates

Green Ball Feed Rate, LTPH 288 289 285 287

Fired Pellet Production Rate, LTPH 228 230 229 229

Total Particulate Emission Rate, lb/LT Greenball 0.093 0.070 0.082 0.082

Total Particulate Emission Rate, lb/LT Fired Pellet 0.117 0.088 0.102 0.103
Cliffs Natural Resources Barr Engineering Co.

United Taconite, LLC January 25, 2012

Forbes, Minnesota

TABLE 2

 EPA METHOD 8 TEST RESULTS

Line 1 Waste Gas Stack (SV046)

Parameter Run 1 Run 2 Run 3 Average

Scrubber - Pressure Drop, in. H2O 21.9 22 21.4 21.77

Scrubber - Water Flow Rate, gal/min 4161 4154 4156 4157

Test Date 12/20/2011 12/20/2011 12/20/2011 ---

Test Period 1354 - 1502 1549 - 1701 1743 - 1852 ---

Test Duration, min. 60 60 60 60

Avg. Stack Temperature, deg.F 140 140 140 140

Avg. Moisture Content, %V/V 11.6 13.0 11.5 12.0

EPA Method 8 laboratory Results, ug

SO3/SO4-Sulfuric Acid Mist 8,560 14,700 9,890 11,050

SO2 293,000 276,000 281,000 283,000

Air Flow Rate

acfm 404,000 406,000 421,000 410,000

scfm 338,000 339,000 352,000 343,000

dscfm 298,000 295,000 312,000 302,000

Fuel Condition: Solid Fuel

dscfm 298,000 295,000 312,000 302,000

Sample Volume

acf 43.90 45.00 45.95 44.95

dscf 43.23 43.59 44.68 43.83

Isokinetic Variation, % 96.7 98.4 95.6 96.9

 Concentration, lb/dscf

SO3/SO4-Sulfuric Acid Mist 4.4E-07 7.4E-07 4.9E-07 5.6E-07

SO2 1.5E-05 1.4E-05 1.4E-05 1.4E-05

 Emissions Rate, lb/hr

SO3/SO4-Sulfuric Acid Mist 7.8 13 9.1 10

SO2 267 247 259 258

Ratio sulfuric acid mist to SO2, % 2.9 5.3 3.5 3.9

Process Rate

Green Ball Feed Rate, LTPH 288 289 285 287

Fired Pellet Production Rate, LTPH 228 230 229 229
Cliffs Natural Resources Barr Engineering Co.

United Taconite, LLC

Forbes, Minnesota

TABLE 3

EPA METHOD 8 TEST RESULTS

Line 1 Waste Gas Stack (SV046)

Parameter Run 1 Run 2 Run 3 Average

Scrubber - Pressure Drop, in. H2O 21.6 21.7 21.7 21.7

Scrubber - Water Flow Rate, gal/min 4156 4150 4155 4154

Test Date 12/21/2011 12/21/2011 12/21/2011 ---

Test Period 750 - 857 923 - 1029 1100 - 1206 ---

Test Duration, min. 60 60 60 60

Avg. Stack Temperature, deg.F 142 143 143 142

Avg. Moisture Content, %V/V 11.0 11.7 11.1 11.3

EPA Method 8 laboratory Results, ug

SO3/SO4-Sulfuric Acid Mist 3,250 6,070 4,710 4,677

SO2 48,900 37,000 37,600 41,200

Air Flow Rate

acfm 419,000 419,000 417,000 418,000

scfm 345,000 345,000 343,000 344,000

dscfm 307,000 305,000 305,000 306,000

Sample Volume

January 25, 2012

Fuel Condition: Natural Gas

acf 45.52 46.89 45.84 46.08

dscf 44.55 45.24 44.22 44.67

Isokinetic Variation, % 96.6 99.0 96.6 97.4

 Concentration, lb/dscf

SO3/SO4-Sulfuric Acid Mist 1.6E-07 3.0E-07 2.3E-07 2.3E-07

SO2 2.4E-06 1.8E-06 1.9E-06 2.0E-06

 Emissions Rate, lb/hr

SO3

/SO4-Sulfuric Acid Mist 3.0 5.4 4.3 4.2

SO2 45 33 34 37

Ratio sulfuric acid mist to SO2, % 6.6 16 13 12

Process Rates

Green Ball Feed Rate, LTPH 285 286 286 286

Fired Pellet Production Rate, LTPH 231 233 234 233
Cliffs Natural Resources Barr Engineering Co.

United Taconite January 24, 2012

Forbes, Minnesota

Parameter firing solid fuel firing natural gas

Fired Pellet Production Rate, LT pellets/hr 229 233

SAM Emission Rate, lb SAM/hr 10.0 4.2

SO2

 Emission Rate 258 37.3

Ratio of SAM:SO2 Emission Rates 0.039 0.119

S in SAM, lb S/hr 3.28 1.38

S in SO2, lb S/hr 129 18.7

Total S from ore and solid fuel, lb S/hr 132

S in SAM in ore per unit production, lb S/LT pellets 0.0059

S in SO2

 in ore per unit production, lb S/LT pellets 0.080

S in SAM from ore, lb S/hr 1.36

S in SO2

 from ore, lb S/hr 18.4

S in SAM from solid fuel, lb S/hr 1.92

S in SO2 from solid fuel, lb S/hr 111

S from solid fuel, lb S/hr 113

% of S in solid fuel that converts to SAM 1.7%

% of S in solid fuel that converts to SO2 98.3%

Ratio of S in solid fuel that converts to SO2

 vs SAM 98.3 : 1.7

TABLE 4

DERIVATION OF SAM TO SO2 RATIOS

Line 1 (SV046)

Assume all S produced while firing 100 % natural gas comes from the ore. This should relate to the pellet 

production rate:

Multiply the lb S/LT pellets from natural gas (i.e., a measure of S from the ore) by the LT pellets/hr when firing solid 

fuel:
Figures 


Appendices 
Appendix A 

Report Calculations and Nomenclature 
Cliffs Natural Resources Barr Engineering Co.

United Taconite, LLC January 25, 2012

Forbes, Minnesota

Determination of Volumetric Airflow Rate, Gas Composition, Moisture Content, and Particulate Emissions

EPA Methods 2, 3, 4, 5, 202

Line 1 Waste Gas Stack (SV046)

Input Data Symbol Units Run 1 Run 2 Run 3

Test Date - - 12/20/2011 12/20/2011 12/20/2011

Test Period - - 1353 - 1501 1548 - 1700 1742 - 1851

Number of Sample Ports - - 4 4 4

Number of Traverse Points - - 12 12 12

Duct Dimensions (diameter or Length x Width) D, L X W inches 121.40 121.40 121.40

Barometric Pressure Pbar in. Hg 28.57 28.57 28.57

Stack Static Pressure Pg in. H2O -1.75 -1.75 -1.75

Average Stack Temperature, dry bulb Tsf degrees F 138 138 137

Actual Dry Gas Meter Volume Vm cubic feet 38.48 38.00 38.95

Dry Gas Meter Calibration Factor Y - 0.9902 0.9902 0.9902

Average Orifice Meter Pressure Drop DH in H2O 1.38 1.38 1.44

Average Meter Temperature Tmf degrees F 51 57 59

Pitot Tube Coefficient Cp - 0.840 0.840 0.840

Average Square Root of Velocity Head (DP)^0.5 - 1.328 1.311 1.330

Volume of Water Vapor Condensed in Impingers Vwc ml 110 104 112

Mass of Water Vapor Collected in Desiccant Vwsg g 11 10 10

Orsat Results, Dry Basis

Carbon Dioxide %CO2 %v/v 2.10 1.80 2.00

Oxygen %O2 %v/v 18.0 18.5 18.1

Carbon Monoxide + Nitrogen - %v/v 79.9 79.7 79.9

Nozzle Diameter Dn in 0.179 0.179 0.179

Run Time theta min 60 60 60

Particulate Loading

Dry Catch Mdry g 0.0124 0.0096 0.0122

Wet Catch Organic Fraction (used for TPM calculation) M org g 0.0013 0.0003 0.0008

202 CPM result (organic plus inorganic) M CPM g 0.0136 0.0098 0.0105

Total (Dry Catch + 202 CPM result) Mn g 0.0261 0.0194 0.0228

Calculated Data Symbol Units Run 1 Run 2 Run 3

Average Absolute Stack Temperature (R) Tsr degrees R 598 598 597

Tsr = Tsf + 460

Stack Pressure Ps in Hg 28.44 28.44 28.44

Ps = Pbar + Pg / 13.6

Duct Area A Sq. ft 80.383 80.383 80.383

A = L x W/144

Meter Volume at Standard Conditions Vmstd cubic feet 37.70 36.83 37.63

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

Average Moisture Content of Stack Gas MC % Vol 13.13 12.72 13.24

MC = ((.04707 x Vwc+.04715*Vwsg)/((.04707 x Vwc+.04715*Vwsg) + (Vmstd)) x 100

Molecular Weight of Stack Gas, dry Md lb/lbmol 29.06 29.03 29.04

Md = (0.44x(%CO2))+(0.32x(%O2))+(0.28x(%N2+%CO)) 

Molecular Weight of Stack Gas, wet Ms lb/lbmol 27.60 27.63 27.58

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

Average Stack Gas Velocity Vs ft/sec 83.23 82.13 83.33

Vs = 85.49 x Cp x (dP)^0.5 x ((Tsr/(Ps x Ms))^0.5)

Actual Volumetric Flowrate Qa acfm 401,417 396,108 401,898

Qa = 60 x Vs x A

Volumetric Flowrate at Standard Conditions Qs scfm 337,100 332,457 337,787

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

Dry Volumetric Flowrate at Standard Conditions Qd dscfm 292,851 290,174 293,055

Qd = Qa x (1-(MC/100)) x (528/Tsr) x (Ps/29.92)

Nozzle Cross-Sectional Area An sq. ft 0.000175 0.000175 0.000175

An =( 3.14 x Dn^2) /(4 x 144)

Isokinetic Variation I % 98.8 97.4 98.5

I = (0.0945xTsrxVm)/(PsxVsxAn x theta x(1-(MC/100)))

Particulate Concentration

Dry Catch Cs(dry) = 15.432 x M dry / Vmstd Cs(dry) gr/dscf 0.0051 0.0040 0.0050

Wet Catch Org Cs(org) = 15.432 x M org / Vmstd Cs(org) gr/dscf 0.0005 0.0001 0.0003

TPM Cs(TPM)= 15.432 x (Mdry + M org)/ Vmstd Cs(TPM) gr/dscf 0.0056 0.0041 0.0053

202 CPM = 15.432 x M-CPM/ Vmstd Cs(cpm) gr/dscf 0.0056 0.0041 0.0043

Total Cs = 15.432 x Mn / Vmstd Cs gr/dscf 0.0107 0.0081 0.0093

Filterable Particulate Emissions Rate, Dry Catch Only

E(lb/hr) = Cs(dry) x Qd x 60 / 7000 Edry lb/hr 12.8 10.0 12.6

TPM Particulate Emissions Rate,

Dry Catch+Organic Wet Catch

E(lb/hr) = Cs(dry)+Cs (org) x Qd x 60 / 7000 Edry+org lb/hr 14.1 10.3 13.4

Total Particulate Emissions Rate (PM 2.5/PM10),

Dry Catch+202 CPM

E(lb/hr) = Cs x Qd x 60 / 7000 Etot lb/hr 26.8 20.2 23.5
Cliffs Natural Resources Barr Engineering Co.

United Taconite, LLC January 25, 2012

Forbes, Minnesota

Determination of Volumetric Airflow Rate, Gas Composition, Moisture Content, and sulfuric acid mist

EPA Methods 2, 3, 4, 8

Line 1 Waste Gas Stack (SV046)

Fuel Condition: Solid Fuel

Input Data Symbol Units Run 1 Run 2 Run 3

Test Date - - 12/20/2011 12/20/2011 12/20/2011

Test Period - - 1354 - 1502 1549 - 1701 1743 - 1852

Number of Sample Ports - - 4 4 4

Number of Traverse Points - - 12 12 12

Duct Dimensions (diameter or Length x Width) D, L X W inches 121.40 121.40 121.40

Barometric Pressure Pbar in. Hg 28.57 28.57 28.57

Stack Static Pressure Pg in. H2O -1.75 -1.75 -1.75

Average Stack Temperature, dry bulb Tsf degrees F 140 140 140

Actual Dry Gas Meter Volume Vm cubic feet 43.90 45.00 45.95

Dry Gas Meter Calibration Factor Y - 0.9922 0.9922 0.9922

Average Orifice Meter Pressure Drop DH in H2O 2.14 2.24 2.36

Average Meter Temperature Tmf degrees F 51 59 57

Pitot Tube Coefficient Cp - 0.840 0.840 0.840

Average Square Root of Velocity Head (DP)^0.5 - 1.337 1.340 1.394

Volume of Water Vapor Condensed in Impingers Vwc ml 106 115 106

Mass of Water Vapor Collected in Desiccant Vwsg g 15 23 17

Orsat Results, Dry Basis

Carbon Dioxide %CO2 %v/v 2.10 1.80 2.00

Oxygen %O2 %v/v 18.0 18.5 18.1

Carbon Monoxide + Nitrogen - %v/v 79.9 79.7 79.9

Nozzle Diameter Dn in 0.192 0.192 0.192

Run Time theta min 60 60 60

EPA Method 8

SO3/SO4 M-SO3/SO4 ug 8560 14700 9890

SO2 M-SO2 ug 293000 276000 281000

Calculated Data Symbol Units Run 1 Run 2 Run 3

Average Absolute Stack Temperature (R) Tsr degrees R 600 600 600

Tsr = Tsf + 460

Stack Pressure Ps in Hg 28.44 28.44 28.44

Ps = Pbar + Pg / 13.6

Duct Area A Sq. ft 80.383 80.383 80.383

A = L x W/144

Meter Volume at Standard Conditions Vmstd cubic feet 43.23 43.59 44.68

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

Average Moisture Content of Stack Gas MC % Vol 11.64 12.97 11.47

MC = ((.04707 x Vwc+.04715*Vwsg)/((.04707 x Vwc+.04715*Vwsg) + (Vmstd)) x 100

Molecular Weight of Stack Gas, dry Md lb/lbmol 29.06 29.03 29.04

Md = (0.44x(%CO2))+(0.32x(%O2))+(0.28x(%N2+%CO)) 

Molecular Weight of Stack Gas, wet Ms lb/lbmol 27.77 27.60 27.78

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

Average Stack Gas Velocity Vs ft/sec 83.67 84.16 87.20

Vs = 85.49 x Cp x (dP)^0.5 x ((Tsr/(Ps x Ms))^0.5)

Actual Volumetric Flowrate Qa acfm 403,537 405,880 420,542

Qa = 60 x Vs x A

Volumetric Flowrate at Standard Conditions Qs scfm 337,516 339,381 351,934

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

Dry Volumetric Flowrate at Standard Conditions Qd dscfm 298,221 295,355 311,551

Qd = Qa x (1-(MC/100)) x (528/Tsr) x (Ps/29.92)

Nozzle Cross-Sectional Area An sq. ft 0.000201 0.000201 0.000201

An =( 3.14 x Dn^2) /(4 x 144)

Isokinetic Variation I % 96.7 98.4 95.6

I = (0.0945xTsrxVm)/(PsxVsxAn x theta x(1-(MC/100)))

Method 8 Concentrations

SO3/SO4 lb/dscf = M-SO3/SO4 x 2.20462^-9/Vmstd Cs(SO3/SO4) lb/dscf 4.4E-07 7.4E-07 4.9E-07

SO2 lb/dscf = M-SO2 x 2.20462^-9/Vmstd Cs(SO2) lb/dscf 1.5E-05 1.4E-05 1.4E-05

SO3/SO4 emission Rate

SO3/SO4 Edry = Cs(SO3/SO4) x Qd x 60 SO3/SO4 Edry lb/hr 7.8 13.2 9.1

SO2 Emission Rate

Dry Catch+Organic Wet Catch

SO2 Edry = Cs(SO2) x Qd x 60 SO2 Edry lb/hr 267 247 259

Sulfuric Acid Mist percent of Total SO2 emissions

Fraction sulfuric acid mist= (SO3/SO4 Edry)/(SO2 Edry) x 100 Fraction H2SO4 % 2.9 5.3 3.5
Cliffs Natural Resources Barr Engineering Co.

United Taconite, LLC January 25, 2012

Forbes, Minnesota

Determination of Volumetric Airflow Rate, Gas Composition, Moisture Content, and sulfuric acid mist

EPA Methods 2, 3, 4, 8

Line 1 Waste Gas Stack (SV046)

Fuel Condition: Natural Gas

Input Data Symbol Units Run 1 Run 2 Run 3

Test Date - - 12/21/2011 12/21/2011 12/21/2011

Test Period - - 750 - 857 923 - 1029 1100 - 1206

Number of Sample Ports - - 4 4 4

Number of Traverse Points - - 12 12 12

Duct Dimensions (diameter or Length x Width) D, L X W inches 121.40 121.40 121.40

Barometric Pressure Pbar in. Hg 28.23 28.23 28.23

Stack Static Pressure Pg in. H2O -1.75 -1.75 -1.75

Average Stack Temperature, dry bulb Tsf degrees F 142 143 143

Actual Dry Gas Meter Volume Vm cubic feet 45.52 46.89 45.84

Dry Gas Meter Calibration Factor Y - 0.9922 0.9922 0.9922

Average Orifice Meter Pressure Drop DH in H2O 2.25 2.36 2.31

Average Meter Temperature Tmf degrees F 48 55 55

Pitot Tube Coefficient Cp - 0.840 0.840 0.840

Average Square Root of Velocity Head (DP)^0.5 - 1.379 1.377 1.372

Volume of Water Vapor Condensed in Impingers Vwc ml 105 118 109

Mass of Water Vapor Collected in Desiccant Vwsg g 12 9 8

Orsat Results, Dry Basis

Carbon Dioxide %CO2 %v/v 2.00 2.10 2.00

Oxygen %O2 %v/v 18.0 18.1 18.1

Carbon Monoxide + Nitrogen - %v/v 80.0 79.8 79.9

Nozzle Diameter Dn in 0.192 0.192 0.192

Run Time theta min 60 60 60

EPA Method 8

SO3/SO4 M-SO3/SO4 ug 3250 6070 4710

SO2 M-SO2 ug 48900 37000 37600

Calculated Data Symbol Units Run 1 Run 2 Run 3

Average Absolute Stack Temperature (R) Tsr degrees R 602 603 603

Tsr = Tsf + 460

Stack Pressure Ps in Hg 28.10 28.10 28.10

Ps = Pbar + Pg / 13.6

Duct Area A Sq. ft 80.383 80.383 80.383

A = L x W/144

Meter Volume at Standard Conditions Vmstd cubic feet 44.55 45.24 44.22

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

Average Moisture Content of Stack Gas MC % Vol 11.00 11.67 11.08

MC = ((.04707 x Vwc+.04715*Vwsg)/((.04707 x Vwc+.04715*Vwsg) + (Vmstd)) x 100

Molecular Weight of Stack Gas, dry Md lb/lbmol 29.04 29.06 29.04

Md = (0.44x(%CO2))+(0.32x(%O2))+(0.28x(%N2+%CO)) 

Molecular Weight of Stack Gas, wet Ms lb/lbmol 27.83 27.77 27.82

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

Average Stack Gas Velocity Vs ft/sec 86.87 86.93 86.54

Vs = 85.49 x Cp x (dP)^0.5 x ((Tsr/(Ps x Ms))^0.5)

Actual Volumetric Flowrate Qa acfm 418,980 419,270 417,362

Qa = 60 x Vs x A

Volumetric Flowrate at Standard Conditions Qs scfm 345,427 344,998 343,190

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

Dry Volumetric Flowrate at Standard Conditions Qd dscfm 307,416 304,728 305,180

Qd = Qa x (1-(MC/100)) x (528/Tsr) x (Ps/29.92)

Nozzle Cross-Sectional Area An sq. ft 0.000201 0.000201 0.000201

An =( 3.14 x Dn^2) /(4 x 144)

Isokinetic Variation I % 96.6 99.0 96.6

I = (0.0945xTsrxVm)/(PsxVsxAn x theta x(1-(MC/100)))

Method 8 Concentrations

SO3/SO4 lb/dscf = M-SO3/SO4 x 2.20462^-9/Vmstd Cs(SO3/SO4) lb/dscf 1.6E-07 3.0E-07 2.3E-07

SO2 lb/dscf = M-SO2 x 2.20462^-9/Vmstd Cs(SO2) lb/dscf 2.4E-06 1.8E-06 1.9E-06

SO3/SO4 emission Rate

SO3/SO4 Edry = Cs(SO3/SO4) x Qd x 60 SO3/SO4 Edry lb/hr 3.0 5.4 4.3

SO2 Emission Rate

Dry Catch+Organic Wet Catch

SO2 Edry = Cs(SO2) x Qd x 60 SO2 Edry lb/hr 44.6 33.0 34.3

Sulfuric Acid Mist percent of Total SO2 emissions

Fraction sulfuric acid mist= (SO3/SO4 Edry)/(SO2 Edry) x 100 Fraction H2SO4 % 6.6 16.4 12.5
Appendix B 

Field Data Sheets 

Barr EPA METHOD 5 - FIELD DATA SHEET - RUN 1

Engineering CompanyProject Cliffs Natural Resources Train C-8, , P-5 Pitot Tube No. 4-3 Cp 0.840 

Sample Location SV046 Line 1 Waste Gas Stack Meter Y 0.9902 Bar.Press. 28.57 in. Hg Prete

Date 12/20/11 Test 1 Run # 1 Orifice H@ 1.8931 Stat Press. -1.75 in. H2O Postte

Operators DJK/RMP Probe Length 4 ft. Probe Liner Type: Glass Other

Sample Ideal Sample 

Sample Time Actual Velocity Orifice Point Ideal Train Stack Sample Train Tempe

Point DT Meter Vol Head DP, DH Volume Meter Vol Vacuum Temp Filter Probe Impinger 

Vm, ft3 in. H2O in. H2O Vm, ft3 Vm, ft3 in. Hg Ts,°F Outlet 

Start Time 1353 692.28

1 5.0 696.00 2.100 1.61 3.43 695.71 * 138 * * * 2 10.0 699.45 2.100 1.62 3.46 699.17 * 138 * * * 3 15.0 702.41 1.400 1.08 2.82 702.00 * 137 * * * 4 20.0 705.72 1.950 1.51 3.33 705.33 * 137 * * * 5 25.0 709.00 1.800 1.39 3.20 708.53 * 138 * * * 6 30.0 711.71 1.250 0.96 2.67 711.20 * 138 * * * 7 35.0 714.88 1.850 1.43 3.25 714.45 * 138 * * * 8 40.0 718.33 2.100 1.62 3.46 717.91 * 138 * * * 9 45.0 721.09 1.200 0.93 2.62 720.53 * 137 * * * 

10 50.0 724.37 2.050 1.59 3.42 723.95 * 137 * * * 11 55.0 727.83 2.200 1.70 3.54 727.50 * 138 * * * 12 60.0 730.76 1.400 1.08 2.83 730.33 * 138 * * * 

End Time 1501Run Time 60 Avg DH= 1.38 Avg Ts= 137.67 Integrated Gas Sampling Data : MOISTURE RECOVERY DATA :Box No. NA Leak Rate NA cc/min Filter No. 420459 Impinger 1 2 3 Bag No. NA O2 Reading NA % Nozzle No. 3-6 Final wt., g 94 10 106 

Bag Vol. NA O2 Analyzer No. NA Nozzle Dn. 0.179 Initial wt., g 0 0 100 

Difference 94 10 6 
Barr EPA METHOD 5 - FIELD DATA SHEET - RUN 2

Engineering CompanyProject Cliffs Natural Resources Train C-8, 0, P-5 Pitot Tube No. 4-3 Cp 0.840 

Sample Location SV046 Line 1 Waste Gas Stack Meter Y 0.9902 Bar.Press. 28.57 in. Hg Prete

Date 12/20/11 Test 1 Run # 2 Orifice H@ 1.8931 Stat Press. -1.75 in. H2O Postte

Operators DJK/RMP Probe Length 4 ft. Probe Liner Type: Glass Other

Sample Ideal Sample 

Sample Time Actual Velocity Orifice Point Ideal Train Stack Sample Train Temp

Point DT Meter Vol Head DP, DH Volume Meter Vol Vacuum Temp Filter Probe Impinger 

Vm, ft3 in. H2O in. H2O Vm, ft3 Vm, ft3 in. Hg Ts,°F Outlet 

Start Time 1548 731.00

1 5.0 734.20 1.950 1.53 3.36 734.36 * 139 * * * 2 10.0 737.64 2.100 1.65 3.50 737.86 * 139 * * * 3 15.0 740.60 1.450 1.14 2.91 740.77 * 139 * * * 4 20.0 743.85 1.900 1.50 3.34 744.11 * 137 * * * 5 25.0 747.22 1.950 1.54 3.39 747.50 * 138 * * * 6 30.0 749.90 1.150 0.91 2.61 750.10 * 138 * * * 7 35.0 753.18 1.800 1.43 3.27 753.37 * 138 * * * 8 40.0 756.40 1.800 1.43 3.27 756.64 * 138 * * * 9 45.0 759.23 1.300 1.04 2.79 759.43 * 138 * * * 

10 50.0 762.70 2.100 1.68 3.55 762.97 * 137 * * * 11 55.0 766.24 2.150 1.71 3.59 766.56 * 138 * * * 12 60.0 769.00 1.200 0.96 2.68 769.24 * 137 * * * 

End Time 1700Run Time 60 Avg DH= 1.38 Avg Ts= 138.00 Integrated Gas Sampling Data : MOISTURE RECOVERY DATA :Box No. NA Leak Rate NA cc/min Filter No. 420461 Impinger 1 2 3 Bag No. NA O2 Reading NA % Nozzle No. 3-6 Final wt., g 90 4 110 

Bag Vol. NA O2 Analyzer No. NA Nozzle Dn. 0.179 Initial wt., g 0 0 100 

Difference 90 4 10 
Barr EPA METHOD 5 - FIELD DATA SHEET - RUN 3

Engineering CompanyProject Cliffs Natural Resources Train C-8, 0, P-5 Pitot Tube No. 4-3 Cp 0.840 

Sample Location SV046 Line 1 Waste Gas Stack Meter Y 0.9902 Bar.Press. 28.57 in. Hg Prete

Date 12/20/11 Test 1 Run # 3 Orifice H@ 1.8931 Stat Press. -1.75 in. H2O Postte

Operators DJK/RMP Probe Length 4 ft. Probe Liner Type: Glass Other

Sample Ideal Sample 

Sample Time Actual Velocity Orifice Point Ideal Train Stack Sample Train Tempe

Point DT Meter Vol Head DP, DH Volume Meter Vol Vacuum Temp Filter Probe Impinger 

Vm, ft3 in. H2O in. H2O Vm, ft3 Vm, ft3 in. Hg Ts,°F Outlet 

Start Time 1742 769.50

1 5.0 772.90 1.950 1.56 3.41 772.91 * 138 * * * 2 10.0 776.40 2.100 1.68 3.54 776.46 * 137 * * * 3 15.0 779.23 1.300 1.04 2.79 779.25 * 137 * * * 4 20.0 782.60 1.950 1.56 3.42 782.67 * 137 * * * 5 25.0 785.91 1.800 1.44 3.29 785.96 * 137 * * * 6 30.0 788.65 1.250 1.00 2.74 788.70 * 137 * * * 7 35.0 791.88 1.800 1.44 3.29 791.99 * 138 * * * 8 40.0 795.30 2.150 1.72 3.59 795.58 * 138 * * * 9 45.0 798.36 1.350 1.09 2.85 798.44 * 137 * * * 

10 50.0 801.80 2.050 1.65 3.52 801.96 * 136 * * * 11 55.0 805.52 2.350 1.89 3.77 805.73 * 137 * * * 12 60.0 808.45 1.400 1.13 2.92 808.65 * 137 * * * 

End Time 1851Run Time 60 Avg DH= 1.44 Avg Ts= 137.17 Integrated Gas Sampling Data : MOISTURE RECOVERY DATA :Box No. NA Leak Rate NA cc/min Filter No. 420462 Impinger 1 2 3 Bag No. NA O2 Reading NA % Nozzle No. 3-6 Final wt., g 98 4 110 

Bag Vol. NA O2 Analyzer No. NA Nozzle Dn. 0.179 Initial wt., g 0 0 100 

Difference 98 4 10 


Barr EPA METHOD 8 - FIELD DATA SHEET - RUN 1

Engineering CompanyProject Cliffs Natural Resources Train C-4, , P-6 Pitot Tube No. 5-2 Cp 0.840 

Sample Location SV046 Line 1 Waste Gas Stack Meter Y 0.9922 Bar.Press. 28.57 in. Hg Prete

Date 12/20/11 Test 1 Run # 1 Orifice H@ 2.1658 Stat Press. -1.75 in. H2O Postte

Operators DJK/RMP Probe Length 5 ft. Probe Liner Type: Glass Other

Sample Ideal Sample 

Sample Time Actual Velocity Orifice Point Ideal Train Stack Sample Train Tempe

Point DT Meter Vol Head DP, DH Volume Meter Vol Vacuum Temp Filter Probe Impinger 

Vm, ft3 in. H2O in. H2O Vm, ft3 Vm, ft3 in. Hg Ts,°F Outlet 

Start Time 1354 870.56

1 5.0 874.60 2.150 2.53 4.03 874.59 * 140 * * * 2 10.0 878.57 2.200 2.59 4.08 878.67 * 140 * * * 3 15.0 881.85 1.450 1.71 3.32 881.99 * 140 * * * 4 20.0 885.41 1.900 2.24 3.81 885.79 * 140 * * * 5 25.0 889.25 2.000 2.36 3.90 889.70 * 141 * * * 6 30.0 892.51 1.200 1.42 3.04 892.73 * 140 * * * 7 35.0 896.40 2.050 2.43 3.97 896.71 * 140 * * * 8 40.0 900.31 1.900 2.25 3.82 900.52 * 141 * * * 9 45.0 903.38 1.150 1.37 2.98 903.50 * 140 * * * 

10 50.0 906.75 2.100 2.50 4.03 907.53 * 139 * * * 11 55.0 911.00 2.200 2.61 4.12 911.65 * 140 * * * 12 60.0 914.46 1.400 1.67 3.30 914.95 * 140 * * * 

End Time 1502Run Time 60 Avg DH= 2.14 Avg Ts= 140.08 Integrated Gas Sampling Data : MOISTURE RECOVERY DATA :Box No. NA Leak Rate NA cc/min Filter No. NA Impinger 1 2 3 Bag No. NA O2 Reading NA % Nozzle No. Glass Final wt., g 126 150 130 

Bag Vol. NA O2 Analyzer No. NA Nozzle Dn. 0.192 Initial wt., g 100 100 100 

Difference 26 50 30 
Barr EPA METHOD 8 - FIELD DATA SHEET - RUN 2

Engineering CompanyProject Cliffs Natural Resources Train C-4, 0, P-6 Pitot Tube No. 5-2 Cp 0.840 

Sample Location SV046 Line 1 Waste Gas Stack Meter Y 0.9922 Bar.Press. 28.57 in. Hg Prete

Date 12/20/11 Test 1 Run # 2 Orifice H@ 2.1658 Stat Press. -1.75 in. H2O Postte

Operators DJK/RMP Probe Length 5 ft. Probe Liner Type: Glass Other

Sample Ideal Sample 

Sample Time Actual Velocity Orifice Point Ideal Train Stack Sample Train Temp

Point DT Meter Vol Head DP, DH Volume Meter Vol Vacuum Temp Filter Probe Impinger 

Vm, ft3 in. H2O in. H2O Vm, ft3 Vm, ft3 in. Hg Ts,°F Outlet 

Start Time 1549 923.71

1 5.0 927.70 2.050 2.51 4.04 927.75 * 141 * * * 2 10.0 931.72 2.200 2.69 4.19 931.95 * 141 * * * 3 15.0 935.22 1.400 1.73 3.37 935.31 * 140 * * * 4 20.0 939.03 2.050 2.53 4.08 939.39 * 140 * * * 5 25.0 942.95 1.900 2.35 3.93 943.32 * 140 * * * 6 30.0 946.11 1.250 1.55 3.20 946.52 * 140 * * * 7 35.0 950.22 2.100 2.60 4.14 950.66 * 141 * * * 8 40.0 954.34 1.950 2.42 3.99 954.65 * 140 * * * 9 45.0 957.39 1.150 1.43 3.08 957.73 * 140 * * * 

10 50.0 961.11 2.100 2.61 4.15 961.88 * 140 * * * 11 55.0 965.22 2.200 2.73 4.25 966.13 * 140 * * * 12 60.0 968.71 1.450 1.80 3.44 969.57 * 140 * * * 

End Time 1701Run Time 60 Avg DH= 2.24 Avg Ts= 140.25 Integrated Gas Sampling Data : MOISTURE RECOVERY DATA :Box No. NA Leak Rate NA cc/min Filter No. 3" GFF Impinger 1 2 3 Bag No. NA O2 Reading NA % Nozzle No. Glass Final wt., g 137 153 125 

Bag Vol. NA O2 Analyzer No. NA Nozzle Dn. 0.192 Initial wt., g 100 100 100 

Difference 37 53 25 
Barr EPA METHOD 8 - FIELD DATA SHEET - RUN 3

Engineering CompanyProject Cliffs Natural Resources Train C-4, 0, P-6 Pitot Tube No. 5-2 Cp 0.840 

Sample Location SV046 Line 1 Waste Gas Stack Meter Y 0.9922 Bar.Press. 28.57 in. Hg Prete

Date 12/20/11 Test 1 Run # 3 Orifice H@ 2.1658 Stat Press. -1.75 in. H2O Postte

Operators DJK/RMP Probe Length 5 ft. Probe Liner Type: Glass Other

Sample Ideal Sample 

Sample Time Actual Velocity Orifice Point Ideal Train Stack Sample Train Tempe

Point DT Meter Vol Head DP, DH Volume Meter Vol Vacuum Temp Filter Probe Impinger 

Vm, ft3 in. H2O in. H2O Vm, ft3 Vm, ft3 in. Hg Ts,°F Outlet 

Start Time 1743 971.44

1 5.0 975.60 2.300 2.76 4.25 975.69 * 138 * * * 2 10.0 979.67 2.400 2.87 4.33 980.01 * 140 * * * 3 15.0 983.08 1.500 1.80 3.44 983.46 * 140 * * * 4 20.0 987.15 2.200 2.65 4.17 987.62 * 140 * * * 5 25.0 991.22 2.100 2.53 4.07 991.69 * 140 * * * 6 30.0 994.54 1.350 1.63 3.27 994.97 * 139 * * * 7 35.0 998.50 2.100 2.53 4.07 999.04 * 140 * * * 8 40.0 1002.45 2.050 2.47 4.03 1003.07 * 141 * * * 9 45.0 1005.90 1.400 1.69 3.33 1006.40 * 139 * * * 

10 50.0 1009.67 2.250 2.71 4.22 1010.62 * 140 * * * 11 55.0 1013.58 2.400 2.89 4.35 1014.97 * 140 * * * 12 60.0 1017.39 1.500 1.80 3.44 1018.41 * 140 * * * 

End Time 1852Run Time 60 Avg DH= 2.36 Avg Ts= 139.75 Integrated Gas Sampling Data : MOISTURE RECOVERY DATA :Box No. NA Leak Rate NA cc/min Filter No. 3" GFF Impinger 1 2 3 Bag No. NA O2 Reading NA % Nozzle No. Glass Final wt., g 134 150 122 

Bag Vol. NA O2 Analyzer No. NA Nozzle Dn. 0.192 Initial wt., g 100 100 100 

Difference 34 50 22 


Barr EPA METHOD 8 - FIELD DATA SHEET - RUN 1

Engineering CompanyProject Cliffs Natural Resources Train C-4, , P-6 Pitot Tube No. 5-2 Cp 0.840 

Sample Location SV046 Line 1 Waste Gas Stack Meter Y 0.9922 Bar.Press. 28.23 in. Hg Prete

Date 12/21/11 Test 1 Run # 1 Orifice H@ 2.1658 Stat Press. -1.75 in. H2O Postte

Operators DJK/RMP Probe Length 5 ft. Probe Liner Type: Glass Other

Sample Ideal Sample 

Sample Time Actual Velocity Orifice Point Ideal Train Stack Sample Train Tempe

Point DT Meter Vol Head DP, DH Volume Meter Vol Vacuum Temp Filter Probe Impinger 

Vm, ft3 in. H2O in. H2O Vm, ft3 Vm, ft3 in. Hg Ts,°F Outlet 

Start Time 0750 23.60

1 5.0 27.55 2.100 2.42 3.93 27.53 * 140 * * * 2 10.0 31.67 2.350 2.70 4.15 31.68 * 141 * * * 3 15.0 35.27 1.700 1.99 3.58 35.26 * 141 * * * 4 20.0 39.16 2.100 2.46 4.00 39.26 * 141 * * * 5 25.0 43.05 2.000 2.35 3.91 43.17 * 142 * * * 6 30.0 46.42 1.300 1.53 3.16 46.33 * 142 * * * 7 35.0 50.53 2.150 2.54 4.07 50.40 * 141 * * * 8 40.0 54.53 2.000 2.36 3.93 54.33 * 142 * * * 9 45.0 57.69 1.350 1.60 3.23 57.57 * 142 * * * 

10 50.0 61.48 2.100 2.48 4.03 61.60 * 142 * * * 11 55.0 65.42 2.150 2.55 4.09 65.69 * 141 * * * 12 60.0 69.12 1.700 2.01 3.63 69.32 * 143 * * * 

End Time 0857Run Time 60 Avg DH= 2.25 Avg Ts= 141.50 Integrated Gas Sampling Data : MOISTURE RECOVERY DATA :Box No. NA Leak Rate NA cc/min Filter No. NA Impinger 1 2 3 Bag No. NA O2 Reading NA % Nozzle No. Glass Final wt., g 122 157 126 

Bag Vol. NA O2 Analyzer No. NA Nozzle Dn. 0.192 Initial wt., g 100 100 100 

Difference 22 57 26 
Barr EPA METHOD 8 - FIELD DATA SHEET - RUN 2

Engineering CompanyProject Cliffs Natural Resources Train C-4, 0, P-6 Pitot Tube No. 5-2 Cp 0.840 

Sample Location SV046 Line 1 Waste Gas Stack Meter Y 0.9922 Bar.Press. 28.23 in. Hg Prete

Date 12/21/11 Test 1 Run # 2 Orifice H@ 2.1658 Stat Press. -1.75 in. H2O Postte

Operators DJK/RMP Probe Length 5 ft. Probe Liner Type: Glass Other

Sample Ideal Sample 

Sample Time Actual Velocity Orifice Point Ideal Train Stack Sample Train Temp

Point DT Meter Vol Head DP, DH Volume Meter Vol Vacuum Temp Filter Probe Impinger 

Vm, ft3 in. H2O in. H2O Vm, ft3 Vm, ft3 in. Hg Ts,°F Outlet 

Start Time 0923 79.38

1 5.0 83.51 2.200 2.70 4.21 83.59 * 143 * * * 2 10.0 87.71 2.350 2.88 4.34 87.93 * 143 * * * 3 15.0 91.41 1.600 1.97 3.61 91.54 * 143 * * * 4 20.0 95.76 2.200 2.72 4.24 95.79 * 143 * * * 5 25.0 99.89 2.100 2.59 4.13 99.92 * 143 * * * 6 30.0 103.27 1.400 1.74 3.40 103.31 * 143 * * * 7 35.0 107.39 2.050 2.55 4.11 107.42 * 143 * * * 8 40.0 111.29 1.900 2.35 3.95 111.37 * 142 * * * 9 45.0 114.79 1.400 1.74 3.39 114.77 * 143 * * * 

10 50.0 118.52 2.050 2.55 4.11 118.87 * 141 * * * 11 55.0 122.60 2.200 2.72 4.24 123.12 * 143 * * * 12 60.0 126.27 1.500 1.86 3.51 126.63 * 142 * * * 

End Time 1029Run Time 60 Avg DH= 2.36 Avg Ts= 142.67 Integrated Gas Sampling Data : MOISTURE RECOVERY DATA :Box No. NA Leak Rate NA cc/min Filter No. 3" GFF Impinger 1 2 3 Bag No. NA O2 Reading NA % Nozzle No. Glass Final wt., g 137 154 127 

Bag Vol. NA O2 Analyzer No. NA Nozzle Dn. 0.192 Initial wt., g 100 100 100 

Difference 37 54 27 
Barr EPA METHOD 8 - FIELD DATA SHEET - RUN 3

Engineering CompanyProject Cliffs Natural Resources Train C-4, 0, P-6 Pitot Tube No. 5-2 Cp 0.840 

Sample Location SV046 Line 1 Waste Gas Stack Meter Y 0.9922 Bar.Press. 28.23 in. Hg Prete

Date 12/21/11 Test 1 Run # 3 Orifice H@ 2.1658 Stat Press. -1.75 in. H2O Postte

Operators DJK/RMP Probe Length 5 ft. Probe Liner Type: Glass Other

Sample Ideal Sample 

Sample Time Actual Velocity Orifice Point Ideal Train Stack Sample Train Tempe

Point DT Meter Vol Head DP, DH Volume Meter Vol Vacuum Temp Filter Probe Impinger 

Vm, ft3 in. H2O in. H2O Vm, ft3 Vm, ft3 in. Hg Ts,°F Outlet 

Start Time 1100 133.56

1 5.0 137.48 2.150 2.62 4.16 137.72 * 143 * * * 2 10.0 141.60 2.250 2.73 4.24 141.96 * 144 * * * 3 15.0 145.03 1.500 1.83 3.48 145.44 * 143 * * * 4 20.0 149.15 2.050 2.51 4.08 149.52 * 143 * * * 5 25.0 153.15 2.000 2.43 4.01 153.53 * 143 * * * 6 30.0 156.49 1.400 1.72 3.37 156.90 * 143 * * * 7 35.0 160.59 2.150 2.64 4.19 161.09 * 143 * * * 8 40.0 164.67 2.000 2.44 4.03 165.12 * 144 * * * 9 45.0 168.03 1.400 1.71 3.37 168.49 * 143 * * * 

10 50.0 171.88 2.150 2.63 4.18 172.66 * 142 * * * 11 55.0 175.66 2.100 2.55 4.10 176.77 * 143 * * * 12 60.0 179.40 1.600 1.95 3.59 180.36 * 143 * * * 

End Time 1206Run Time 60 Avg DH= 2.31 Avg Ts= 143.08 Integrated Gas Sampling Data : MOISTURE RECOVERY DATA :Box No. NA Leak Rate NA cc/min Filter No. 3" GFF Impinger 1 2 3 Bag No. NA O2 Reading NA % Nozzle No. Glass Final wt., g 128 156 125 

Bag Vol. NA O2 Analyzer No. NA Nozzle Dn. 0.192 Initial wt., g 100 100 100 

Difference 28 56 25 





Appendix C 

Laboratory Reports and Sample Chain of Custody 
Cliffs Natural Resources Barr Engineering Co.

United Taconite, LLC January 17, 2012

Forbes, MN

Results of Gravimetric Particulate Analysis

Line 1 Waste Gas Stack SV046

December 20, 2011

Parameter Symbol Units Run 1 Run 2 Run 3 Reagent Blank Train Blank

Method 5/201A Particulate Mass Determination

Air Filter Particulate Net Mass Maf g 0.00968 0.00883 0.01079 -0.00012

Probe Rinse Particulate Net Mass Mpw, Mpwb g 0.00353 0.00156 0.00245 0.00161

Probe Rinse Volume Vpw, Vpwb ml 100 100 125 150

Probe Rinse Blank Correction1 Cpw g 0.00080 0.00080 0.00100

Cpw =Vpw x Mpwb/Vpwb

Probe Rinse Blank Corrected Mass Mpwc g 0.00273 0.00076 0.00145

Mpw =Mpw -Cpwc

Filterable Particulate Mass Mdry g 0.01241 0.00959 0.01224

Mdry =Maf +Mpwc

Method 202 Particulate Mass Determination

Organic Particulate Analysis

Impinger Rinse Net Mass Mmc, Mmcb g 0.00309 0.00212 0.00259 0.00182

Impinger Rinse Volume Vmc, Vmcb ml 370 340 365 340

Impinger Rinse Blank Correction2 Cmc g 0.00182 0.00182 0.00182

Cmc =Vmc x Mmcb/Vmcb

Organic Particulate Mass Morg g 0.00127 0.00031 0.00077

Morg =Mmc -Cmc

Inorganic Particulate Analysis

Impinger Contents Net Mass Mwf, Mwfb g 0.01336 0.01093 0.01065 0.0015

Impinger Contents After Aliquot Vwf, Vwfb ml 585 675 645 585

Stack Moisture Vwc ml 110 104 112

DI Impinger Charge and Rinse Vdi ml 575 671 633

Vdi =Vwf -Vwc

Inorganic Particulate Mass Mio g 0.01336 0.01093 0.01065

Mio =Mwfc x (Vwf+Vb)/Vwf

Determination of NH4

+

 Retained in Sample by Titration

Normality of NH4OH N 0.1041

Volume of Solution Titrated Vst ml 100 100 100

Volume of Titrant Vt ml 0.45 0.70 0.40

NH4 Addition Mass Mc g 0.000798 0.001241 0.000709

mc=17.03 x Vt x N /1000

Inorganic Particulate Mass (titrated) Miorg g 0.01256 0.00969 0.00994

Miorg =Mio -Mc

Total CPM for EPA Method 202

organic plus Inorganic blank corrected to train blank, limited to 2 mg

Combined CPM 0.01565 0.01182 0.01253

Combined Train Blank Mass actual 0.00332

Maxmimum Train Blank Correction allowed 0.00200 0.00200 0.00200

CPM train blank corrected mass 0.01365 0.00982 0.01053

1

 Blank correction will be limited to 0.001% of the solvent weight

K, correction factor for SO4 0.35400

2 organic fraction blank corrected per EPA Method 202 pre Jan 1 2011 for comparison to MN rules for TPM

Organic Train 

blank

Inorganic Train 

Blank
SAMPLES COLLECTED BY DJK

ANALYZED ON: 12/21 ANALYSIS PERFORMED BY TYL

Run Filter ID Description Gross 

Weight Date/Time Tare Weight Date/Time Uncorrected 

Net Mass (g)

Total 

Preliminary 

Results

0.65245 12/22/2011 10:05 0.64283 8/17/2011 11:34

0.65251 12/22/2011 16:07 0.64276 8/18/2011 9:30 0.02966

0.64870 12/22/2011 10:06 0.63980 8/17/2011 11:36

0.64867 12/22/2011 16:08 0.63991 8/18/2011 9:32 0.02345

0.65087 12/22/2011 10:07 0.64007 8/17/2011 11:38

0.65089 12/22/2011 16:09 0.64010 8/18/2011 9:33 0.02648

0.63914 12/22/2011 10:07 0.63949 8/17/2011 11:39

0.63914 12/22/2011 16:11 0.63904 8/18/2011 9:33 0.00481

LABORATORY REPORT

PARTICULATE TESTING FRONT HALF GRAVIMETRIC RESULTS

CLIENT United Taconite, LLC.

Light Yellow

TEST DATE 12/20/2011

SOURCE ID Line 1 Waste Gas Stack SV046

0.00968

SAMPLING LOCATION Stack

AIR FILTERS: 4 INCH GFF

R1

PROJECT NO. 23/69-1260.01 200 004

TEST T1

R2 420461 Light Yellow 0.00883

420459

-0.00012

R3 420462 Light Yellow 0.01079

R0 420463 Blank 0.63914 12/22/2011 16:11 0.63904 8/18/2011 9:33 0.00481

Run Beaker ID Description Gross 

Weight Date/Time Tare Weight Date/Time Uncorrected 

Net Mass (g)

Solvent 

Volume 

(ml)

Is There 

Evidence of 

Sample 

Loss?

101.74209 12/22/2011 9:50 101.73858 11/7/2011 14:34

101.74170 12/22/2011 16:01 101.73815 11/8/2011 8:12

102.68785 12/22/2011 9:51 102.68639 11/7/2011 14:35

102.68776 12/22/2011 16:03 102.68609 11/8/2011 8:11

105.89171 12/22/2011 9:53 105.88925 11/7/2011 14:36

105.89153 12/22/2011 16:04 105.88910 11/8/2011 8:10

1.30822 12/26/2011 21:55 1.30662 11/16/2011 15:05

1.30825 12/27/2011 9:46 1.30663 11/17/2011 8:15

-0.00012

0.00353 100 No

PROBE WASH: ACETONE

R1 150 Light Particulate 

0.00156

R0 420463 Blank

100 No

R3 429 Light Particulate 0.00245 125

R2 50 Light Particulate

R0 T648 Slight residue 0.00161

No

150 No

REMARKS

PAGE 1 OF 2 1/17/2012 
ANALYZED ON 12/21

ANALYSIS PERFORMED BY MDM3

Run Beaker ID Description Gross 

Weight Date/Time Tare Weight Date/Time Uncorrected 

Net Mass (g)

Solvent 

Volume 

(ml)

Is There 

Evidence of 

Sample 

Loss?

1.29543 12/26/2011 21:54 1.29236 11/16/2011 15:04

1.29542 12/27/2011 9:46 1.29232 11/17/2011 8:15

1.30548 12/26/2011 21:51 1.30338 11/16/2011 15:03

1.30552 12/27/2011 9:48 1.30337 11/17/2011 8:16

1.29705 12/26/2011 21:49 1.29445 12/21/2011 14:50

1.29708 12/27/2011 9:49 1.29450 12/22/2011 8:48

1.30330 12/26/2011 21:48 1.30275 12/21/2011 14:49

1.30336 12/27/2011 9:49 1.30276 12/22/2011 8:49

1.29947 12/26/2011 21:44 1.29768 12/21/2011 14:48

LABORATORY REPORT

PARTICULATE TESTING BACK HALF GRAVIMETRIC RESULTS

CLIENT United Taconite, LLC.

SOURCE ID Line 1 Waste Gas Stack SV046

PROJECT NO. 23/69-1260.01 200 004

TEST T1

TEST DATE 12/20/2011

SAMPLING LOCATION Stack

HEXANE EXTRACT (ORGANIC)

R1 T649 Slight residue No

R2 T650 Slight residue 0.00212 340 No

0.00309 370

R3 T651 Slight residue 0.00259 No

R0 T652 Slight residue 0.00057 150 No

365

1.29947 12/26/2011 21:44 1.29768 12/21/2011 14:48

1.29951 12/27/2011 9:50 1.29766 12/22/2011 8:50

Run Beaker ID Description Gross 

Weight Date/Time Tare Weight Date/Time Uncorrected 

Net Mass (g)

Solvent 

Volume 

(ml)

Is There 

Evidence of 

Sample 

Loss?

1.31076 12/26/2011 22:02 1.29740 12/21/2011 14:47

1.31072 12/27/2011 9:42 1.29736 12/22/2011 8:51

1.31495 12/26/2011 22:03 1.30404 12/21/2011 14:46

1.31498 12/27/2011 9:43 1.30402 12/22/2011 8:52

1.30077 12/26/2011 22:07 1.29012 12/21/2011 14:45

1.30075 12/27/2011 9:44 1.29010 12/22/2011 8:53

1.28649 12/26/2011 22:01 1.28632 12/21/2011 14:43

1.28650 12/27/2011 9:44 1.28632 12/22/2011 8:53

1.30087 12/26/2011 21:58 1.29936 12/21/2011 14:40

1.30088 12/27/2011 9:46 1.29938 12/22/2011 8:54

Slight residue 0.00182 340 No

WATER FRACTION (INORGANIC)

R1 T655 White residue 0.01336 585 No

R000 T654

No

R2 T656 White residue 0.01093 675 No

R3 T657 White residue

Inorganic Titration Performed? Yes 

Remarks:

No

R0 T658 White residue 0.00018

0.01065 645

150 No

R000 T660 White residue 0.00150 585

PAGE 2 OF 2 1/17/2012 

Cliffs Natural Resources Barr Engineering Co.

United Taconite, LLC

Forbes, Minnesota

Fuel Condition: Coal

IPA Impinger

Run 1 Run 2 Run 3

mg, SO3/SO4 8.56 14.70 9.89

Impinger results, SO2 fraction

Run 1 Run 2 Run 3

mg SO2 293 276 281
Cliffs Natural Resources Barr Engineering Co.

United Taconite, LLC

Forbes, Minnesota

Fuel Condition: Natural Gas

IPA Impinger

Run 1 Run 2 Run 3

mg, SO3/SO4 3.25 6.07 4.71

Impinger results, SO2 fraction

Run 1 Run 2 Run 3

mg SO2 48.9 37.0 37.6














Appendix D 

Calibration Data 
Routine Dry Gas Meter Calibration

Control Module: C-4 Leak checks Barometric Press. -- 29.27

Date: 12/12/11 Negative -- ok >5 W.C. Previous Y -- 1.0042

Technician: TJW2 Positive -- ok > 15 in.HgPrevious Delta H -- 2.1428

Orifice Wet Test Wet Test Dry Gas Meter Orifice

Diff Volume, Meter Volume CoefficientCoefficient

Pressure H Ft3Inlet Outlet Temp, °F Ft3Y dH@

Nominal Initial Initial Initial Initial Initial

0.500 7822.00 76.0 74.0 70.0 864.800

Actual Final Final Final Final Final Minutes SEC

7827.00 76.0 74.0 70.0 869.900 13 21

0.50 Total Average Average Average Total Minutes

5.00 76.0 74.0 70.0 5.100 13.35 0.9884 2.0307

75.0

Nominal Initial Initial Initial Initial Initial

1.000 7791.00 75.0 73.0 70.0 833.470

Actual Final Final Final Final Final Minutes SEC

7796.00 75.0 73.0 70.0 838.540 9.0 36.44

1.00 Total Average Average Average Total Minutes

5.00 75.0 73.0 70.0 5.070 9.61 0.9911 2.1073

74.0 Tm

Nominal Initial Initial Initial Initial Initial

2.000 7797.00 76.0 73.0 70.0 839.560

Dry Gas Meter Elapsed

Temp, °F Time of

Cal. Point

2.000 7797.00 76.0 73.0 70.0 839.560

Actual Final Final Final Final Final Minutes SEC

7802.00 77.0 73.0 70.0 844.600 6 58.91

2.00 Total Average Average Average Total

5.00 76.5 73.0 70.0 5.040 6.98 0.9960 2.2258

74.8 Tm

Nominal Initial Initial Initial Initial Initial

3.000 7803.00 77.0 73.0 70.0 845.620

Actual Final Final Final Final Final Minutes SEC

7808.00 77.0 73.0 70.0 850.660 5.0 41.65

3.00 Total Average Average Average Total

5.00 77.0 73.0 70.0 5.040 5.69 0.9939 2.2208

75.0 Tm

Nominal Initial Initial Initial Initial Initial

4.000 7810.00 77.0 74.0 70.0 852.680

Actual Final Final Final Final Final Minutes SEC

7820.00 77.0 74.0 70.0 862.770 9.0 55.47

4.00 Total Average Average Average Total

10.00 77.0 74.0 70.0 10.090 9.92 0.9914 2.2445

75.5 Tm Average 0.9922 2.1658

M5APR.WQ1
Cliffs Natural Resources Barr Engineering Co.

United Taconite, LLC January 25, 2012

Forbes, Minnesota

Emission Measurement Center (EMC) Approved Alternate Method (ALT-009)

Alternative Method 5 Post-Test Calibration

Control Module C-4

Line 1 Waste Gas Stack (SV046)

Input Data Symbol Units Run 1 Run 2 Run 3

Test date - - 12/20/2011 12/20/2011 12/20/2011

Test period - - 1354 - 1502 1549 - 1701 1743 - 1852

Total run time t min 60 60 60

Total sample volume measured by dry gas meter Vm acf 43.9 45.0 45.9

Absolute average dry gas meter temp Tm °F 50.5 59.2 57.4

Absolute average dry gas meter temp Tm °R 510.2 518.9 517.1

Barometric pressure Pb inches Hg 28.6 28.6 28.6

Conversion factor (29.92/528)(0.75)2

--- (in Hg/°R) cfm20.0319 0.0319 0.0319

Average orifice meter differential ∆ havg in. H2O 2.14 2.24 2.36

Orifice meter calibration coefficient ∆ H@ in. H2O 2.17 2.17 2.17

Dry molecular weight of stack gas Md lb/lb-mole 29.06 29.03 27.78

Dry molecular weight of air --- lb/lb-mole 29.00 29.00 29.00

Specific gravity of mercury --- Dimensionless 13.60 13.60 13.60

Dry gas meter calibration check value Yqa Dimensionless 1.0219 1.0297 1.0552

Dry gas meter calibration factor Y Dimensionless 0.9922 0.9922 0.9922

Average of Yqa's from test run series 1.0356

Dry gas meter calibration factor 0.9922

% difference between average Yqa's and Y -4.38%

(must be within ± 5%)

( )

29

13 6.

(

t .0 0319

@

avg

avg d

b

m

m

qa h

h M

H P

T

V

Y • ∆

∆

∆ +

⋅

=
Cliffs Natural Resources Barr Engineering Co.

United Taconite, LLC January 25, 2012

Forbes, Minnesota

Emission Measurement Center (EMC) Approved Alternate Method (ALT-009)

Alternative Method 5 Post-Test Calibration

Control Module C-4

Line 1 Waste Gas Stack (SV046)

Input Data Symbol Units Run 1 Run 2 Run 3

Test date - - 12/21/2011 12/21/2011 12/21/2011

Test period - - 750 - 857 923 - 1029 1100 - 1206

Total run time t min 60 60 60

Total sample volume measured by dry gas meter Vm acf 45.5 46.9 45.8

Absolute average dry gas meter temp Tm °F 47.8 55.3 55.3

Absolute average dry gas meter temp Tm °R 507.5 514.9 514.9

Barometric pressure Pb inches Hg 28.2 28.2 28.2

Conversion factor (29.92/528)(0.75)2

--- (in Hg/°R) cfm20.0319 0.0319 0.0319

Average orifice meter differential ∆ havg in. H2O 2.25 2.36 2.31

Orifice meter calibration coefficient ∆ H@ in. H2O 2.17 2.17 2.17

Dry molecular weight of stack gas Md lb/lb-mole 29.04 29.06 29.04

Dry molecular weight of air --- lb/lb-mole 29.00 29.00 29.00

Specific gravity of mercury --- Dimensionless 13.60 13.60 13.60

Dry gas meter calibration check value Yqa Dimensionless 1.0135 1.0155 1.0283

Dry gas meter calibration factor Y Dimensionless 0.9922 0.9922 0.9922

Average of Yqa's from test run series 1.0191

Dry gas meter calibration factor 0.9922

% difference between average Yqa's and Y -2.71%

(must be within ± 5%)

( )

29

13 6.

(

t .0 0319

@

avg

avg d

b

m

m

qa h

h M

H P

T

V

Y • ∆

∆

∆ +

⋅

=
THERMOCOUPLE ID C-4-I

Cal Date: 1/13/2011

CALIBRATION TECHNICIAN: MMK2

REFERENCE STANDARDS DATE

Hart Scientific 9103-A s/n A1B289 Report No. T10-0105-2 1/5/2010

Hart Scientific 9140 s/n A1B086 Report No. T10-0105-1 1/5/2010

Temperature Calibration Points 20 70 150

Reference Deg F (To) 20 70 150

Probe Temp (deg F) 20 69 149

Reference Temp (deg R) deg F + 460 480 530 610

Probe Temp (deg R), deg F + 460 480 529 609

Difference (degrees) 0 1 1

% Diff Abs. T 0.0% 0.2% 0.2%

THERMOCOUPLE CALIBRATION

Meter In or Out

TRACEABILITY LABORATORY

Hart Scientific

Hart Scientific

400

500

600

700

800

900

1000

1100

1200

1300

1400

1500

1600

1700

400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700

THERMOCOUPLE TEMPERATURE, deg.R

REFERENCE TEMPERATURE, deg.R

THERMOCOUPLE CALIBRATION

Calibration Curve - Unit Under Test

Upper Limit of Calibration

Lower Limit of Calibration

Extrapolated Calibration Curve

THERMOCOUPLE ID C-4-I

Regression R Squared = 0.999998

-20 1200

Technician signature

QA signature

FAHRENHEIT 

CALIBRATION RANGE

400

500

600

700

800

900

1000

1100

1200

1300

1400

1500

1600

1700

400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700

THERMOCOUPLE TEMPERATURE, deg.R

REFERENCE TEMPERATURE, deg.R

THERMOCOUPLE CALIBRATION

Calibration Curve - Unit Under Test

Upper Limit of Calibration

Lower Limit of Calibration

Extrapolated Calibration Curve

THERMOCOUPLE ID C-4-I

Regression R Squared = 0.999998
THERMOCOUPLE ID C-4-O

Cal Date: 1/13/2011

CALIBRATION TECHNICIAN: MMK2

REFERENCE STANDARDS DATE

Hart Scientific 9103-A s/n A1B289 Report No. T10-0105-2 1/5/2010

Hart Scientific 9140 s/n A1B086 Report No. T10-0105-1 1/5/2010

Temperature Calibration Points 20 70 150

Reference Deg F (To) 20 70 150

Probe Temp (deg F) 21 69 149

Reference Temp (deg R) deg F + 460 480 530 610

Probe Temp (deg R), deg F + 460 481 529 609

Difference (degrees) -1 1 1

% Diff Abs. T 0.2% 0.2% 0.2%

THERMOCOUPLE CALIBRATION

Meter In or Out

TRACEABILITY LABORATORY

Hart Scientific

Hart Scientific

400

500

600

700

800

900

1000

1100

1200

1300

1400

1500

1600

1700

400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700

THERMOCOUPLE TEMPERATURE, deg.R

REFERENCE TEMPERATURE, deg.R

THERMOCOUPLE CALIBRATION

Calibration Curve - Unit Under Test

Upper Limit of Calibration

Lower Limit of Calibration

Extrapolated Calibration Curve

THERMOCOUPLE ID C-4-O

Regression R Squared = 0.999989

-20 1200

Technician signature

QA signature

FAHRENHEIT 

CALIBRATION RANGE

400

500

600

700

800

900

1000

1100

1200

1300

1400

1500

1600

1700

400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700

THERMOCOUPLE TEMPERATURE, deg.R

REFERENCE TEMPERATURE, deg.R

THERMOCOUPLE CALIBRATION

Calibration Curve - Unit Under Test

Upper Limit of Calibration

Lower Limit of Calibration

Extrapolated Calibration Curve

THERMOCOUPLE ID C-4-O

Regression R Squared = 0.999989
PYROMETER

CALIBRATION

Pyrometer Number: C-4 Date: 1/14/11

Pyrometer Reference: CL-300-1000F Technician: TJW2

Pyrometer o F

Pass/Fail

1000 538 Pass

950 510 Pass

900 482 Pass

850 454 Pass

800 427 Pass

750 399 Pass

700 371 Pass

650 343 Pass

600 316 Pass

550 288 Pass

500 260 Pass

450 232 Pass

997

948

Reference (°F) Reference (°C) Reading

898

848

798

748

698

649

598

549

498

448

400 204 Pass

350 177 Pass

300 149 Pass

250 121 Pass

200 93 Pass

150 67 Pass

100 38 Pass

50 10 Pass

0 -18 Pass

-50 -46 Pass

Pass/Fail based on +/- 0.75% of Renkin value

Technician signature:

QA signature:

398

348

-1

-51

299

249

199

150

99

50
Routine Dry Gas Meter Calibration

Control Module: C-8 Leak checks Barometric Press. -- 29.24

Date: 11/4/2011 Negative -- ok >5 W.C. Previous Y -- 0.9884

Technician: AGA Positive -- ok > in.Hg Previous Delta H -- 1.8860

.

Orifice Wet Test Wet Test Dry Gas Meter Orifice

Diff Volume, Meter Volume Coefficient Coefficient

Pressure H Ft3Inlet Outlet Temp, F Ft3Y dH@

Nominal Initial Initial Initial Initial Initial

0.500 7377.00 75.0 70.0 74.0 96.860

Actual Final Final Final Final Final Minutes SEC

7382.00 74.0 71.0 74.0 101.860 12 34.75

0.50 Total Average Average Average Total Minutes

5.00 74.5 70.5 74.0 5.000 12.58 0.9959 1.8442

72.5

Nominal Initial Initial Initial Initial Initial

1.000 7382.50 74.0 71.0 74.0 102.360

Actual Final Final Final Final Final Minutes SEC

7387.50 73.0 72.0 73.5 107.370 8.0 57.06

1.00 Total Average Average Average Total

5.00 73.5 71.5 73.8 5.010 8.95 0.9932 1.8623

72.5 Tm

Nominal Initial Initial Initial Initial Initial

2.000 7388.00 73.0 72.0 73.5 107.875

Actual Final Final Final Final Final Minutes SEC

7393.00 73.0 72.0 73.0 112.900 6 25

2.00 Total Average Average Average Total

5.00 73.0 72.0 73.3 5.025 6.42 0.9887 1.9087

Dry Gas Meter Elapsed

Temp, F Time of

Cal. Point

5.00 73.0 72.0 73.3 5.025 6.42 0.9887 1.9087

72.5 Tm

Nominal Initial Initial Initial Initial Initial

3.000 7394.00 73.0 72.0 73.0 113.905

Actual Final Final Final Final Final Minutes SEC

7399.00 74.0 72.0 73.0 118.930 5.0 15.69

3.00 Total Average Average Average Total

5.00 73.5 72.0 73.0 5.025 5.26 0.9871 1.9232

72.8 Tm

Nominal Initial Initial Initial Initial Initial

4.000 7400.00 74.0 72.0 73.0 119.940

Actual Final Final Final Final Final Minutes SEC

7410.00 74.0 72.0 73.0 129.980 9.0 7.37

4.00 Total Average Average Average Total

10.00 74.0 72.0 73.0 10.040 9.12 0.9861 1.9273

73.0 Tm Average 0.9902 1.8931
Cliffs Natural Resources Barr Engineering Co.

United Taconite, LLC January 25, 2012

Forbes, Minnesota

Emission Measurement Center (EMC) Approved Alternate Method (ALT-009)

Alternative Method 5 Post-Test Calibration

Control Module C-8

Line 1 Waste Gas Stack (SV046)

Input Data Symbol Units Run 1 Run 2 Run 3

Test date - - 12/20/2011 12/20/2011 12/20/2011

Test period - - 1353 - 1501 1548 - 1700 1742 - 1851

Total run time t min 60 60 60

Total sample volume measured by dry gas meter Vm acf 38.5 38.0 39.0

Absolute average dry gas meter temp Tm °F 51.2 56.7 58.5

Absolute average dry gas meter temp Tm °R 510.8 516.4 518.2

Barometric pressure Pb inches Hg 28.6 28.6 28.6

Conversion factor (29.92/528)(0.75)2

--- (in Hg/°R) cfm20.0319 0.0319 0.0319

Average orifice meter differential ∆ havg in. H2O 1.38 1.38 1.44

Orifice meter calibration coefficient ∆ H@ in. H2O 1.89 1.89 1.89

Dry molecular weight of stack gas Md lb/lb-mole 29.06 29.03 29.04

Dry molecular weight of air --- lb/lb-mole 29.00 29.00 29.00

Specific gravity of mercury --- Dimensionless 13.60 13.60 13.60

Dry gas meter calibration check value Yqa Dimensionless 1.0013 1.0201 1.0177

Dry gas meter calibration factor Y Dimensionless 0.9902 0.9902 0.9902

Average of Yqa's from test run series 1.0130

Dry gas meter calibration factor 0.9902

% difference between average Yqa's and Y -2.31%

(must be within ± 5%)

( )

29

13 6.

(

t .0 0319

@

avg

avg d

b

m

m

qa h

h M

H P

T

V

Y • ∆

∆

∆ +

⋅

=
THERMOCOUPLE ID C-8-I

Cal Date: 1/26/2011

CALIBRATION TECHNICIAN: AGA

REFERENCE STANDARDS DATE

Hart Scientific 9103-A s/n A1B289 Report No. T10-0105-2 1/5/2010

Hart Scientific 9140 s/n A1B086 Report No. T10-0105-1 1/5/2010

Temperature Calibration Points 20 70 150

Reference Deg F (To) 20 70 150

Probe Temp (deg F) 21 70 149

Reference Temp (deg R) deg F + 460 480 530 610

Probe Temp (deg R), deg F + 460 481 530 609

Difference (degrees) -1 0 1

% Diff Abs. T 0.2% 0.0% 0.2%

THERMOCOUPLE CALIBRATION

Meter In

TRACEABILITY LABORATORY

Hart Scientific

Hart Scientific

400

500

600

700

800

900

1000

1100

1200

1300

1400

1500

1600

1700

400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700

THERMOCOUPLE TEMPERATURE, deg.R

REFERENCE TEMPERATURE, deg.R

THERMOCOUPLE CALIBRATION

Calibration Curve - Unit Under Test

Upper Limit of Calibration

Lower Limit of Calibration

Extrapolated Calibration Curve

THERMOCOUPLE ID C-8-I

Regression R Squared = 0.999992

-20 1200

Technician signature

QA signature

FAHRENHEIT 

CALIBRATION RANGE

400

500

600

700

800

900

1000

1100

1200

1300

1400

1500

1600

1700

400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700

THERMOCOUPLE TEMPERATURE, deg.R

REFERENCE TEMPERATURE, deg.R

THERMOCOUPLE CALIBRATION

Calibration Curve - Unit Under Test

Upper Limit of Calibration

Lower Limit of Calibration

Extrapolated Calibration Curve

THERMOCOUPLE ID C-8-I

Regression R Squared = 0.999992
THERMOCOUPLE ID C-8-O

Cal Date: 1/26/2011

CALIBRATION TECHNICIAN: AGA

REFERENCE STANDARDS DATE

Hart Scientific 9103-A s/n A1B289 Report No. T10-0105-2 1/5/2010

Hart Scientific 9140 s/n A1B086 Report No. T10-0105-1 1/5/2010

Temperature Calibration Points 20 70 150

Reference Deg F (To) 20 70 150

Probe Temp (deg F) 21 70 149

Reference Temp (deg R) deg F + 460 480 530 610

Probe Temp (deg R), deg F + 460 481 530 609

Difference (degrees) -1 0 1

% Diff Abs. T 0.2% 0.0% 0.2%

THERMOCOUPLE CALIBRATION

Meter Out

TRACEABILITY LABORATORY

Hart Scientific

Hart Scientific

400

500

600

700

800

900

1000

1100

1200

1300

1400

1500

1600

1700

400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700

THERMOCOUPLE TEMPERATURE, deg.R

REFERENCE TEMPERATURE, deg.R

THERMOCOUPLE CALIBRATION

Calibration Curve - Unit Under Test

Upper Limit of Calibration

Lower Limit of Calibration

Extrapolated Calibration Curve

THERMOCOUPLE ID C-8-O

Regression R Squared = 0.999992

-20 1200

Technician signature

QA signature

FAHRENHEIT 

CALIBRATION RANGE

400

500

600

700

800

900

1000

1100

1200

1300

1400

1500

1600

1700

400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700

THERMOCOUPLE TEMPERATURE, deg.R

REFERENCE TEMPERATURE, deg.R

THERMOCOUPLE CALIBRATION

Calibration Curve - Unit Under Test

Upper Limit of Calibration

Lower Limit of Calibration

Extrapolated Calibration Curve

THERMOCOUPLE ID C-8-O

Regression R Squared = 0.999992
PYROMETER

CALIBRATION

Pyrometer Number: C-8 Date: 1/20/2011

Pyrometer Reference: CL-300-1000F Technician: AGA

Pyrometer o F

Pass/Fail

1000 538 Pass

950 510 Pass

900 482 Pass

850 454 Pass

800 427 Pass

750 399 Pass

700 371 Pass

650 343 Pass

600 316 Pass

550 288 Pass

500 260 Pass

450 232 Pass

Reference (°F) Reference (°C) Reading

1002

952

902

852

802

752

702

652

600

549

498

448

400 204 Pass

350 177 Pass

300 149 Pass

250 121 Pass

200 93 Pass

150 67 Pass

100 38 Pass

50 10 Pass

0 -18 Pass

-50 -46 Pass

Pass/Fail based on +/- 0.75% of Renkin value

Technician signature:

QA signature:

399

49

0

-50

349

300

251

200

150

98
THERMOCOUPLE ID TC5-2

Cal Date: 1/7/2011

CALIBRATION TECHNICIAN: MMK2

REFERENCE STANDARDS DATE

Hart Scientific 9103-A s/n A1B289 Report No. T10-0105-2 1/5/2010

Hart Scientific 9140 s/n A1B086 Report No. T10-0105-1 1/5/2010

Temperature Calibration Points 32 212 400 650 Ambient

Reference Deg F (To) 32 212 400 650 70

Probe Temp (deg F) 33 209 398 648 70

Reference Temp (deg R) deg F + 460 492 672 860 1110 530

Probe Temp (deg R), deg F + 460 493 669 858 1108 530

Difference (degrees) -1 3 2 2 0

% Diff Abs. T 0.2% 0.4% 0.2% 0.2% 0.0%

Is difference less than 1.5% at all 

measured points? YES

THERMOCOUPLE CALIBRATION

M-5 Probe

TRACEABILITY LABORATORY

Hart Scientific

Hart Scientific

400

500

600

700

800

900

1000

1100

1200

1300

1400

1500

1600

1700

400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700

THERMOCOUPLE TEMPERATURE, deg.R

REFERENCE TEMPERATURE, deg.R

THERMOCOUPLE CALIBRATION

Calibration Curve - Unit Under Test

Upper Limit of Calibration

Lower Limit of Calibration

Extrapolated Calibration Curve

THERMOCOUPLE ID TC5-2

Regression R Squared = 0.99997

Are extrapolated limits less than 1.5%? YES

-20 1200

Technician signature

QA signature

FAHRENHEIT 

CALIBRATION RANGE

If not acceptable, describe corrective action:

400

500

600

700

800

900

1000

1100

1200

1300

1400

1500

1600

1700

400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700

THERMOCOUPLE TEMPERATURE, deg.R

REFERENCE TEMPERATURE, deg.R

THERMOCOUPLE CALIBRATION

Calibration Curve - Unit Under Test

Upper Limit of Calibration

Lower Limit of Calibration

Extrapolated Calibration Curve

THERMOCOUPLE ID TC5-2

Regression R Squared = 0.99997
THERMOCOUPLE ID TC4-3

Cal Date: 1/8/2011

CALIBRATION TECHNICIAN: MMK2

REFERENCE STANDARDS DATE

Hart Scientific 9103-A s/n A1B289 Report No. T10-0105-2 1/5/2010

Hart Scientific 9140 s/n A1B086 Report No. T10-0105-1 1/5/2010

Temperature Calibration Points 32 212 400 650 Ambient

Reference Deg F (To) 32 212 400 650 70

Probe Temp (deg F) 34 212 398 650 70

Reference Temp (deg R) deg F + 460 492 672 860 1110 530

Probe Temp (deg R), deg F + 460 494 672 858 1110 530

Difference (degrees) -2 0 2 0 0

% Diff Abs. T 0.4% 0.0% 0.2% 0.0% 0.0%

Is difference less than 1.5% at all 

measured points? YES

THERMOCOUPLE CALIBRATION

M-5 Probe

TRACEABILITY LABORATORY

Hart Scientific

Hart Scientific

400

500

600

700

800

900

1000

1100

1200

1300

1400

1500

1600

1700

400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700

THERMOCOUPLE TEMPERATURE, deg.R

REFERENCE TEMPERATURE, deg.R

THERMOCOUPLE CALIBRATION

Calibration Curve - Unit Under Test

Upper Limit of Calibration

Lower Limit of Calibration

Extrapolated Calibration Curve

THERMOCOUPLE ID TC4-3

Regression R Squared = 0.999974

Are extrapolated limits less than 1.5%? YES

-20 1200

Technician signature

QA signature

FAHRENHEIT 

CALIBRATION RANGE

If not acceptable, describe corrective action:

400

500

600

700

800

900

1000

1100

1200

1300

1400

1500

1600

1700

400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700

THERMOCOUPLE TEMPERATURE, deg.R

REFERENCE TEMPERATURE, deg.R

THERMOCOUPLE CALIBRATION

Calibration Curve - Unit Under Test

Upper Limit of Calibration

Lower Limit of Calibration

Extrapolated Calibration Curve

THERMOCOUPLE ID TC4-3

Regression R Squared = 0.999974


Cliffs Natural Resources Barr Engineering Co.

United Taconite December 20, 2011

Forbes, Minnesota

Nozzle Calibration

L1 WGS (SV046)

Nozzle Calibration

Nozzle No. Glass Used for Runs: 1 - 3

Point Measurement, inches

1 0.191

2 0.192

3 0.193

Average 0.192

Test Date 12/20/2011

Date Measured: 12/20/2011

Technician: DJK

Signature:
Cliffs Natural Resources Barr Engineering Co.

United Taconite December 20, 2011

Forbes, Minnesota

Nozzle Calibration

L1 WGS (SV046)

Nozzle Calibration

Nozzle No. 3-6 Used for Runs: 1 - 3

Point Measurement, inches

1 0.180

2 0.179

3 0.179

Average 0.179

Test Date 12/20/2011

Date Measured: 12/20/2011

Technician: DJK

Signature:
Field Barometer Calibration

Calibration to National Weather Service at Chisholm-Hibbing Airport

Station elevation at Barr Hibbing Office 3128 14th Avenue East, Hibbing, MN 1460 ft.

Barometer: DJK - BA.09

Field Barometer Barr Office

Date Technician Time Altimeter ID Time

Barometric 

Pressure

Station 

Pressure Condition Remarks

NWS Observation

10/17/11 DJK 21:53 30.12 DJK 22:52 28.67 28.66 In Calibration As Found

12/16/11 TYL 8:53 30.34 DJK 944 28.93 28.88 In Calibration As Found

1/4/12 DJK 9:53 29.95 DJK 10:55 28.55 28.49 In Calibration As Found
Appendix E 

Visual Emissions Certificate 

Appendix F 

Cylinder Gas Certification 
	

   !!" #$%&'(&)*+!,-+!. /00123 &))+4'56'77)6'5+89 ::';+&)9'+&<9=> ,1?+@ABC+D&'7 4>6'&-+BE+//31?2!11 F?/!G+01!2!?/?   HI	IJKLMN OPQQRL	STUSTPV W/1+9X+CY)6'5Z+=[>+++\+++6[7)Z6>7-+8+?!/,2,!/

]^9'7;++_F?/GW/12W,0+++\+++`&X;++_F?/GW/12!31+++\+++aaabZc9::<&))6'bc9<

ijk # l defgh    m  $ #$# $ $jin ok$k  #$ jk$ $pq#jqr q#k $ $jik#$$   $k strtu v$ $k i ijk #kn/+F3+Z:>+c(+w:G ijk #!+YZ65 8&)x9'+>69X6>7 !y!,y! ?b31+z+b?+{ y!/y!3 8|D}E~4+; 8801?3 C7)6&=++W0 y!/y! ?b31+{ ^7)<&=+89'>(c:6[6:* "&Z+8^)9<9:95)&Y^* &)6&'+B9>7=+13 +0b0+{ j$$j#$ $  ?b31+{ ?b33+{ "B}C @X*57' !y!,y! ?b33+z+b/+{ y!/y!3 8|D}E~4+; 88/0 C7)6&=++E9'7 y!/y! ?b33+{ ^7)<&=+89'>(c:6[6:* "&Z+8^)9<9:95)&Y^* &)6&'+B9>7=+10 +b1+{ j$$j#$ $  ?b33+{ "B}C E6:)957' &=&'c7

^7+9'=*+=6&x6=6:*+9w+:^6Z+c9<Y&'*+w9)+5&Z+a^6c^+w&6=Z+:9+c9<Y=*+a6:^+:^6Z+&'&=*Z6Z+Z^&==+x7+)7Y=&c7<7':+9)+)7&'&=*Z6Z+:^7)79w+x*+:^7+c9<Y&'*+a6:^9(:+7X:)&+c9Z:b

r BbCb8&=^9(' %b+b+B&))6' $ $ji$# ^7+&x9[7+&'&=*Z7Z+a7)7+Y7)w9)<7>+6'+&cc9)>&'c7+a6:^+])9c7>()7+"+9w+:^7+4]+)&c7&x6=6:*+])9:9c9=-+7Y9):+E(<x7)+4]2Wy?,y!-+>&:7>+ C7Y:7<x7)+??,b ^7+&x9[7+&'&=*Z7Z+&)7+6'[&=6>+6w+:^7+c*=6'>7)+Y)7ZZ()7+6Z+=7ZZ+:^&'+/+YZ65b
	

   !"!"# $%&'()*"+*", !-."./" 011*23453661534*78 993:*0183*0;8(< =>-*?@AB*C036 2<530+*AD*!!E>-/">> F-!"G*H>"/"-!-   IJ	JKLMNO PQRRSM	TUVTUQW .!>*8X*BY1534Z*([<***\***5[61Z5<6+*7*-"!=/="!

]^836:**_F-!G.!>/.=H***\***`0X:**_F-!G.!>/"E>***\***aaabZc899;01153bc8;

ghi $ j %dedef    k  % $%$ % %hgl mi%i  $% hi% %no$hop o$i % %hgi$%%   %i qrprs t% %i g ghi $il!*FE*Z9<*c'*u9G ghi $"*YZ54 701v83*<58X5<6 !w">w" Eb-!*x*b*y .w.w"E 7zC{D|2*}: 77"".. B6150(*}*.H .w.w" Eb-!*y ~^61;0(*783<'c95[59) #0Z*7^18;898410Y^) 01503*A8<6(*>E *>bH*y h%%h$% %  Eb-!*y Eb-.*y #A{B ?X)463 .wEw" "b.!*x*b""*y .wEw"E 7zC{D|2*}: 77HHH"E B6150(*}*D836 .wEw" "b.!*y ~^61;0(*783<'c95[59) #0Z*7^18;898410Y^) 01503*A8<6(*>H *"Eb-E*y h%%h$% %  "b..*y "b.!*y #A{B D5918463 0(03c6

~^6*83()*(50v5(59)*8u*9^5Z*c8;Y03)*u81*40Z*a^5c^*u05(Z*98*c8;Y()*a59^*9^5Z*030()Z5Z*Z^0((*v6*16Y(0c6;639*81*16030()Z5Z*9^6168u*v)*9^6*c8;Y03)*a59^8'9*6X910*c8Z9b

p AbBb70(^8'3 &b*~b*A01153 % %hg%$ ~^6*0v8[6*030()Z6Z*a616*Y61u81;6<*53*0cc81<03c6*a59^*]18c6<'16*#*8u*9^6*2]*~10c60v5(59)*]1898c8(+*6Y819*D';v61*2]/.w-=w"+*<096<* B6Y96;v61*--=b ~^6*0v8[6*030()Z6Z*016*53[0(5<*5u*9^6*c)(53<61*Y16ZZ'16*5Z*(6ZZ*9^03*!*YZ54b
Appendix G 

Process Operating Data 
Form ST-05

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

Equipment & Operating Data

1. 

2. NO: If no, explain:

3. 

4. 

5. 

Run 1 Average

288 287

228 229.0

5.34 5.08

6

Fired Pellets, LTPH

 

Process Parameter: list type and units

229

 

4.77

 

SV046/EU040

Fuel Input (list units) Coal, TPH 

12/20/2011

Run 3

285

Line 1 Waste Gas Stack - Coal

Greenball Feed Rate, LTPH

United Taconite, LLC

Test Date(s): Process Equipment Number/Identification:

Company Name:

Process Equipment Description:

Were the process and control equipment operated consistent with normal procedures? YES:

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

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

See Attached

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

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

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

Run 2

289

230

 

5.14

ratios as appropriate 

Heat Input (10 

6

 British thermal units/hour)

6

• Baghouse, Cyclone, and Multi-clone: ∆P (in. w.c.)

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

Run 1 Average

4161 4157

21.9 21.8

Run 1 Average

aq-f6-ST05 Form ST-05, Page 1 of 1

Monitor (list averaging basis): 

Scrubber Flow, gpm

APC and parameter monitored Run 3

4156

 

4154

List pollutant & averaging basis.--should reflect permit Run 3

Continuous Opacity Monitor(list hourly average) 

Monitor (list averaging basis): 

 

Run 2

22.0

Examples of APC equipment and parameters generally monitored. Monitor as in test plan and/or approval letter.

• Scrubber (list type of scrubber): ∆P (in. w.c.) and feed rate (gpm and psig)

• Catalytic Incinerator :(°Fin ,°Fout) and Thermal Incinerator: (°Ftemperature)

Scrubber Pressure Drop, in. w.c. 21.4

Note: This form provides only a summary of the operating conditions during the performance test. Additional and more detailed records are required 

to meet the requirements of Minn. R. 7017.2035, subp. 3. This form is to be submitted as part of the performance test report.

 

Run 2

 

 

 

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)

Abbreviations: APC-air pollution control gpm.-gallons per minute in. w.c.-inches of water column 

lbs.-pounds psig-pressure per square inch gauge ∆P- pressure drop
Cliffs Natural Resources

United Taconite, LLC

Forbes, MN

Line 1 Waste Gas Stack

SV046

Process Data - Coal

Barr Engineering

1/16/2011

dP Water Flow Airflow Airflow Greenball Fired Pellets Fuel Use

Start Time End Time inches GPM ACFM SCFM LTPH LTPH cfm or stph

12/20/11 13:54 12/20/11 14:09 21.9 4160 384216 322651 288 228 5.34

12/20/11 14:09 12/20/11 14:24 21.9 4159 385752 323838 285 226 5.34

12/20/11 14:24 12/20/11 14:39 21.9 4156 382355 320913 288 230 5.34

12/20/11 14:39 12/20/11 14:54 21.9 4166 384045 322211 289 229 5.34

12/20/11 14:54 12/20/11 15:09 21.9 4162 382993 321363 287 227 5.34

Run 1 Average 21.9 4161 383872 322195 288 228 5.34

12/20/11 15:49 12/20/11 16:04 21.9 4156 382970 321174 290 231 4.80

12/20/11 16:04 12/20/11 16:19 22.0 4156 384312 322431 290 231 4.94

12/20/11 16:19 12/20/11 16:34 22.0 4162 385523 323578 287 230 5.37

12/20/11 16:34 12/20/11 16:49 22.0 4154 384617 322920 288 230 5.32

12/20/11 16:49 12/20/11 17:04 22.0 4145 383258 321767 290 230 5.28

Run 2 Average 22.0 4154 384136 322374 289 230 5.14

12/20/11 17:43 12/20/11 17:58 19.8 4162 385059 323469 284 227 4.77

12/20/11 17:58 12/20/11 18:13 21.7 4156 386908 325076 284 228 4.77

12/20/11 18:13 12/20/11 18:28 21.7 4161 382593 321472 287 230 4.77

12/20/11 18:28 12/20/11 18:43 21.8 4148 384015 322548 285 229 4.77

12/20/11 18:43 12/20/11 18:58 21.9 4155 382790 321597 285 229 4.77

Run 3 Average 21.4 4156 384273 322833 285 229 4.77
Form ST-05

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

Equipment & Operating Data

1. 

2. NO: If no, explain:

3. 

4. 

5. 

Run 1 Average

285 286

231 233

2741 2728

6

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

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

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

Run 2

286

233

 

2713

ratios as appropriate 

Heat Input (10 

6

 British thermal units/hour)

Company Name:

Process Equipment Description:

Were the process and control equipment operated consistent with normal procedures? YES:

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

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

See Attached

SV046/EU40

Fuel Input (list units) Natural Gas, cfm 

12/21/2011

Run 3

286

Line 1 Waste Gas Stack - Gas

Greenball Feed Rate, LTPH

United Taconite, LLC

Test Date(s): Process Equipment Number/Identification:

Process Parameter: list type and units

234

 

2730

 

Fired Pellets, LTPH

 

6

• Baghouse, Cyclone, and Multi-clone: ∆P (in. w.c.)

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

Run 1 Average

4156 4154

21.6 21.7

Run 1 Average

aq-f6-ST05 Form ST-05, Page 1 of 1

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)

Note: This form provides only a summary of the operating conditions during the performance test. Additional and more detailed records are required 

to meet the requirements of Minn. R. 7017.2035, subp. 3. This form is to be submitted as part of the performance test report.

 

Run 2

 

 

 

21.9

Examples of APC equipment and parameters generally monitored. Monitor as in test plan and/or approval letter.

• Scrubber (list type of scrubber): ∆P (in. w.c.) and feed rate (gpm and psig)

• Catalytic Incinerator :(°Fin ,°Fout) and Thermal Incinerator: (°Ftemperature)

Scrubber Pressure Drop, in. w.c. 21.7

 

Run 2

List pollutant & averaging basis.--should reflect permit Run 3

Continuous Opacity Monitor(list hourly average) 

Monitor (list averaging basis): 

 

Monitor (list averaging basis): 

Scrubber Flow, gpm

APC and parameter monitored Run 3

4155

 

4150

Abbreviations: APC-air pollution control gpm.-gallons per minute in. w.c.-inches of water column 

lbs.-pounds psig-pressure per square inch gauge ∆P- pressure drop
Cliffs Natural Resources

United Taconite, LLC

Forbes, MN

Line 1 Waste Gas Stack

SV046

Process Data - Gas

Barr Engineering

1/16/2011

dP Water Flow Airflow Airflow Greenball Fired Pellets Fuel Use

Start Time End Time inches GPM ACFM SCFM LTPH LTPH cfm or stph

12/21/11 7:50 12/21/11 8:05 21.5 4159 382478 320072 285 231 2760

12/21/11 8:05 12/21/11 8:20 21.5 4151 385092 322422 286 232 2755

12/21/11 8:20 12/21/11 8:35 21.6 4154 387147 323961 283 229 2759

12/21/11 8:35 12/21/11 8:50 21.6 4157 386949 323827 284 230 2724

12/21/11 8:50 12/21/11 9:05 21.7 4159 390578 326822 286 231 2709

Run 1 Average 21.6 4156 386449 323421 285 231 2741

12/21/11 9:23 12/21/11 9:38 21.8 4142 388402 324616 285 232 2710

12/21/11 9:38 12/21/11 9:53 21.8 4149 389196 325383 286 232 2704

12/21/11 9:53 12/21/11 10:08 21.9 4168 389052 325318 287 234 2706

12/21/11 10:08 12/21/11 10:23 22.0 4144 386745 323697 284 231 2708

12/21/11 10:23 12/21/11 10:38 21.9 4147 387431 324185 287 233 2740

Run 2 Average 21.9 4150 388165 324640 286 233 2713

12/21/11 11:00 12/21/11 11:15 22.0 4153 388017 324145 288 235 2779

12/21/11 11:15 12/21/11 11:30 21.9 4141 386878 323246 285 234 2775

12/21/11 11:30 12/21/11 11:45 21.0 4172 385872 322565 287 234 2775

12/21/11 11:45 12/21/11 12:00 21.9 4149 386366 322787 287 235 2665

12/21/11 12:00 12/21/11 12:15 21.9 4161 388662 324847 282 231 2656

Run 3 Average 21.7 4155 387159 323518 286 234 2730
As outlined in the test plan submitted to MPCA on 9/9/2011 and approved by MPCA on 9/30/11, the 

following is a description of any necessary work done within 30-days prior to the test. 

The Line 1 furnace was down for repairs from 12/5/11 through 12/8/11. During this time, several pellet 

quality and process stability issues were addressed including grate repairs , a new seal on the coal feed 

line, an additional roll segment to the greenball feed zone, and a new burner tip. The grate repairs and 

roll segment helped to improve pellet quality issues. The new seal on the coal feed line replaced a 

temporary fix that had been implemented to address coal leakage. The burner tip was replaced to help 

address material build up that was occurring within the kiln. 

During this same timeframe, the Line 1 scrubber underwent routine maintenance, which included 

inspecting of the scrubber, patching several small holes in the ducting, and installing additional 

inspection ports. In addition, baffle walls were installed on the demister tanks of the Line 1 scrubber to 

ensure even air flow distribution to the demist panels. 
	
	
 

 

   ! !"! #  !" 	
	$ %&'()*+,(- ./%-012134445346 7889&+,(- 2 :;<=>?@AB?C>?@ADEF@=>EDD>A?@G<BH=><==H@= IJK&L*- MN
OOPQRPNRSTQRMS
M 
 TUV SW
X
 Y  Z**&L*K(L- [
#
\]	
 ^_+,(-  !" `]
#
		
 :abc>defghij:>cakll>je:>mi>nionedgfid>ipfio:>bj>qgll

/rs'J&+t&*rKJ8 /rs'J&+u(v+,(-++++++ /rs'J&+tr*&- /rs'J&+t&8KvLr*K(L-++ /rs'J&+wKs&- /rs'J&+%&x(vLKy&z+Z8- Z))K{rJ+tr*&- w&8*+%&89J*8 |_7/w.%} Z/+ |}w~_t .,7w/ %}} %}I}7}t |(K8*9)&+3+w(*rJ PY`   Z8 PY`!  "" " (Jr*KJ&+|r**&) PY`  K&z+Ir)(L++tK&)&Lx& /9J9)+ PY`!   ! /_ M]XX]
 X$$ ! ,&*+IrJ+rJ9&+r*+I(L8*+^)&889)& 
T ! [
 
T ! [ )(88+IrJ+rJ9&+r*+I(L8*+(J PY`" [    PY`" UX   Ir)(L PY`  ~z)(v&L ,K*)(v&L _v&L PY`"  IJ()KL& PY`"! $ J9()KL& PY`" $ |&)x9) PY`"!! $ /(zK9s+_Kz&+KL+Z8 PY`"! $ ~r)zv)({&+)KLzrKJK*+7Lz& PY` 
V

I(ss&L*8

ZLrJ*KxrJ+w&8*+%&'()* \
WP
	 
Y]]
 !! !! MTPNPM\S" M]X !!
	
	
 

 

   ! !"! #  !" 	
	$ %&'()*+,(- ./%-012134445345 6778&+,(- 2 9:;<=>?@A>B=>?@CDE?<=DCC=@>?F;AG<=;<<G?< HIJ&K*- LM
NNOPQOMQRSPQLR
L 
 STU RV
W
 X  Y**&K*J(K- Z
#
[\	
 ]^+,(-  !" _\
#
		
 9`ab=cdefghi9=b`jkk=id9=lh=mhnmdcfehc=hoehn9=ai=pfkk

/qr'I&+s&*qJI7 /qr'I&+t(u+,(-++++++ /qr'I&+sq*&- /qr'I&+s&7JuKq*J(K-++ /qr'I&+vJr&- /qr'I&+%&w(uKJx&y+Y7- Y))JzqI+sq*&- v&7*+%&78I*7 {^6/v.%| Y/+ {|v}^s .,6v/ ~%|| %|H|6|s {(J7*8)&+3+v(*qI OX_   Y7 OX_!    (Iq*JI&+{q**&) OX_  ~J&y+Hq)(K++sJ&)&Kw& /8I8)+ OX_!   " /^ L\WW\
 W$$ ! ,&*+HqI+qI8&+q*+H(K7*+])&778)& 
S ! Z
 
S ! Z )(77+HqI+qI8&+q*+H(K7*+(I OX_" Z "  OX_" TW   Hq)(K OX_  }y)(u&K ,J*)(u&K ^u&K OX_"  HI()JK& OX_"! $ ~I8()JK& OX_" $ {&)w8) OX_"!! $ /(yJ8r+^Jy&+JK+Y7 OX_"! $ }q)yu)(z&+)JKyqJIJ*+6Ky& OX_ 
U

H(rr&K*7

YKqI*JwqI+v&7*+%&'()* [
VO
	 
X\\
 !! !! LSOMOL[R L\W !!
	
	
 

 

   ! !"! #  !" 	
	$ %&'()*+,(- ./%-012134445341 6778&+,(- 2 9:;<=>?@A>B=>?@CDE?<=DCC=@>?F;AG<=;<<G?< HIJ&K*- LM
NNOPQOMQRSPQLR
L 
 STU RV
W
 X  Y**&K*J(K- Z
#
[\	
 ]^+,(-  !" _\
#
		
 9`ab=cdefghi9=b`jkk=id9=lh=mhnmdcfehc=hoehn9=ai=pfkk

/qr'I&+s&*qJI7 /qr'I&+t(u+,(-++++++ /qr'I&+sq*&- /qr'I&+s&7JuKq*J(K-++ /qr'I&+vJr&- /qr'I&+%&w(uKJx&y+Y7- Y))JzqI+sq*&- v&7*+%&78I*7 {^6/v.%| Y/+ {|v}^s .,6v/ ~%|| %|H|6|s {(J7*8)&+3+v(*qI OX_  ! Y7 OX_!  " " (Iq*JI&+{q**&) OX_  ~J&y+Hq)(K++sJ&)&Kw& /8I8)+ OX_!    /^ L\WW\
 W$$ ! ,&*+HqI+qI8&+q*+H(K7*+])&778)& 
S ! Z
 
S ! Z )(77+HqI+qI8&+q*+H(K7*+(I OX_" Z !  OX_" TW "  Hq)(K OX_  }y)(u&K ,J*)(u&K ^u&K OX_"  HI()JK& OX_"! $ ~I8()JK& OX_" $ {&)w8) OX_"!! $ /(yJ8r+^Jy&+JK+Y7 OX_"! $ }q)yu)(z&+)JKyqJIJ*+6Ky& OX_ 
U

H(rr&K*7

YKqI*JwqI+v&7*+%&'()* [
VO
	 
X\\
 !! !!! LSOMOL[R! L\W !!
Appendix H 

Stack Test Plan 
1

Ryan Pantzke

From: Place, Andrew (MPCA) [andrew.place@state.mn.us]

Sent: Friday, September 30, 2011 11:06 AM

To: Maxwell, Candice A.

Cc: Tom Kuchinski; Palzkill, Steven (MPCA)

Subject: Test Plan Approval

Attachments: Electronic Submittals Guidance Document.Approval.pdf; Operating Data Summary for 

Combustion Sources.doc; Operating Data Summary for Process Sources.doc; TEST 

REPORT CERTIFICATION.doc; TEST REPORT MICROFICHE SUBMITTAL.doc; Utac, EU 

040 SAM, PM, 10-11.docx

Candice, 

The forms for the upcoming performance test on EU040 are attached with this email. Please read the approval over 

prior to the test to ensure you are in agreement with the conditions surrounding the test. 

Print a copy of this email as verification of the approval date. Additional forms and guidance may be found at 

http://www.pca.state.mn.us/air/performancetest.html . If you have any questions or comments, feel free to call. 

Thanks, 

Andy Place 

Performance Test Coordinator

Minnesota Pollution Control Agency 

520 Lafayette Road 

St. Paul, MN 55155-4194 

651-757-2652 

Andrew.Place@state.mn.us
aq-f6-08 

5/1/07 Page 1 of 2 

Air Performance Test Form

Performance Test Plan Approval

Facility Information (please print)

Facility name: United Taconite, LLC AQ#: 869A 

Facility contact: Candice Maxwell – Section Manager, Environmental Affairs 

Address: 1200 West Highway 16, Forbes, MN 55738 

Phone: (218) 744-7849 

Unit(s) to be tested: Line 1 Pellet Induration (EU040) for SAM and particulate 

Scheduled for: October 17, 2011 at the facility located in: Forbes, Minnesota. 

Test Plan 

Submitted on (date): September 9, 2011 Discussed on (date): September 29, 2011 

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

 Shortened test notification approved 

 Test plan approved without modification 

 Test plan approved with the following provisions: 

1. Operate scrubber at or below the current operating limits to avoid a more stringent rate being placed as a limit. The 

facility may operate at lower rates if they wish to reduce the limit. 

2. All periods indicating noncompliance with emission limits must be reported to the MPCA. This includes any periods of 

engineering tests. Operating at a rate other than that required by the current air permit must also be reported. 

Deviations ultimately need to be reported on the facility’s semiannual deviation and annual compliance certification 

forms. 

3. Electronic submittal of the test report will be considered acceptable as allowed by the letter from the MPCA dated 

March 3, 2010. In addition to the information relating to the test required by the letter also please include the 

emission unit(s) tested and the test date(s) as part of the notification email. 

4. If CD continues to be submitted label should include: Facility Name, AQ File No., Emission Unit Designator, and Test 

Date. 

Attached Forms 

 Operating Data Summary – Combustion Sources Operating Data Summary – Waste Combustors 

 Operating Data Summary – Process Sources Operating Data Summary – Asphalt Plants 

 Certifications Form Microfiche/CD-ROM Submittal Form 

 Performance Test Report Completeness Criteria 

Note: Forms are also available at www.pca.state.mn.us/air/performancetest.html

Approved by: 

Date: September 30, 2011 

Andrew Place, Pollution Control Specialist 

Compliance and Enforcement Unit 

Minnesota Pollution Control Agency 
aq-f6-08 

5/1/07 Page 2 of 2 

Please contact me at 651-757-2652 if you have any questions regarding this approval. 

Please be aware that enforcement action will be taken for performance test failures indicating emissions above applicable limits 

(excess actual emissions to the environment). Failures commonly result in assessment of a monetary penalty. Upon the first test 

failure, the Company should take immediate measures to minimize emissions. The measures taken should be documented, as they 

will become part of the record of corrective actions. 

Hard Copy Performance Test Reports and Microfiche or CD Copy submittals will be addressed to: 

Air Quality Compliance Tracking Coordinator 

Minnesota Pollution Control Agency 

520 Lafayette Road North 

St. Paul, Minnesota 55155-4194 

cc: Tom Kuchinski, Barr Engineering Co. (email)

 Steve Palzkill, MPCA (email) 
Test Plan 

For A Taconite Production Facility 

United Taconite, LLC 

 Forbes, Minnesota 

Date Test Plan created/revised: September 8, 2011 

Scheduled Test Dates: Week of October 17, 2011

PART I: General Information 

Emissions facility 

location 

Facility contact Testing company contact

United Taconite, LLC 

1200 West Hwy 16

Forbes, Minnesota 

55738 

Candice Maxwell 

Section Manager - Environmental Affairs 

United Taconite, LLC 

P.O. Box 180 

Eveleth, Minnesota 55738 

(218) 744-7849 

(218) 744-7635 (fax) 

Dan Koschak 

Sr. Air Quality Technician 

Barr Engineering Company 

3128 14th Avenue East 

Hibbing, MN 55746 

(218) 225-8635 

Minnesota Air Emissions Permit Number: 13700113-005 

AQD File Number: 869A 

Reason emissions units are to be tested: 

Performance Test: Due no more than 180 days after resuming operation of EU 040 following the 

modification of EU 040 authorized by Air Emission Permit No. 13700113-005 to verify the ratio of 

sulfuric acid mist to sulfur dioxide used in the application for Air Emission Permit No. 13700113-

005. Testing is to be conducted while firing only solid fuel and again while firing only natural gas. 

A test for particulate matter (TPM), PM2.5, PM10, opacity, and sulfuric acid mist will be performed

while firing only solid fuel. A test for sulfuric acid mist will be performed while firing only natural 

gas. 

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 nomenclature Emissions unit 

number 

Stack vent 

number 

Group No. 

Line 1 Pellet Induration EU040 SV046 -- 

 
2

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 

nomenclature 

Limitation Basis of Pollutant 

Tested 

Pollutant 

Tested/Permit Limit 

Specific 

Methods/Procedures 

Required Citation 

Line 1 Waste 

Gas Stack 

(SV046) 

(EU040) 

Sulfuric Acid Mist/Sulfur 

Dioxide 

Title I Condition: Testing 

associated with a limit 

taken to avoid classification 

as a major modification 

under 40 CFR Section 

52.21 and Minn. R. 

7007.3000; Minn. R. 

7017.2020, subp. 1 

Sulfuric Acid 

Mist/Sulfur Dioxide 

less than or equal to 

6.25 tons using 30-

day Rolling Sum rolled 

daily. 

Sulfuric Acid 

Mist/Sulfur Dioxide 

Testing will be 

performed 

during two fuel firing 

conditions (solid fuel and 

natural gas only) 

EPA Method 1-4, 8 

40 CFR Part 60 

Appendix A 

Total Particulate Matter: 

Title I Condition: To avoid 

classification as a major 

modification under 40 CFR 

Section 52.21 and Minn. R. 

7007.3000; Minn. R. 

7011.0610, subp.1(A)(1) 

and Minn. R. 7011.0710, 

subp. 3; Minn. R. 

7007.0800, subps. 2 and 14

PM2.5 and PM10

Title I Condition: To avoid 

classification as a major 

modification under 40 CFR 

Section 52.21 and Minn. R. 

7007.3000; Minn. R. 

7007.0800, subps. 2 and 14

Opacity 

Minn. R. 7011.0610, subp. 

1(A)(2) 

Total Particulate 

Matter: less than or 

equal to 0.0070 

grains/dry standard 

cubic foot 

using 3-hour Average 

(standard cubic feet of 

exhaust gas). 

Compliance with this 

limit also 

demonstrates 

compliance with Minn. 

R. 7011.0610, 

subp.1(A)(1) and 

Minn. R. 7011.0710, 

subp. 3. 

PM2.5 and PM10:

less than or equal to 

0.0139 grains/dry 

standard cubic foot 

using 3-hour Average 

(standard cubic feet of 

exhaust gas) 

Opacity 

less than or equal to 

20 percent opacity 

except for one sixminute period 

per hour of not more 

than 60 percent 

opacity.

Particulate Matter:

(testing conducted on 

solid fuel only) 

EPA Method 1-5 

40 CFR 60 Appendix A 

and 

Method 202 for 

condensible particulate 

Three 60 minute test 

runs to collect >32 dscf. 

All fractions of sample 

train (filterable + organic 

and inorganic 

condensibles) will be 

used to represent PM10

and PM2.5 

Opacity 

One 60- minute test to 

determine opacity by 

EPA Method 9 

40 CFR 60 Appendix A 
3

Part III: Operating Conditions 

Process equipment description for units to be tested

Emission Unit #(s) Stack Vent # Description 

EU040 SV046 Line 1 pellet induration process waste gases 

Process Parameters to be Monitored: all units to be tested at 90 percent or greater of 

maximum production

Emission Unit #(s) Process 

Parameter Units Frequency Range 

EU040 (Line 1) 

Greenball feed 

rate 

Long Tons per 

hour 15 minutes 250 

Solid fuel input Tons/hour 15 minutes 4-7 

Natural Gas 

usage-Max SCFM 15 minutes To be determined 

Control equipment 

ID 

Control equipment 

description 

Monitored parameters 

Control device parameters recorded at 

minimum of 15 minute intervals during the test 

CE056, SV046 Wet scrubber high 

efficiency w/out lime 

Scrubber water flow rate, gpm. 

Pressure drop across each scrubber, inches 

w.c 

Data collected during particulate testing on 

solid fuel will be used to establish daily 

minimum pressure drop and water flow rate 

Part IV: Test Methods 

All tests will be performed using the following USEPA reference test methods. 

Test methods 

Method 1 Sample and Velocity Traverses for Stationary Sources. Once per location 

Method 2 EPA Method 2 for stack gas velocity and volumetric flow rate. One 

determination per sulfuric acid mist test run. 

Method 3 /3A EPA Method 3 or modified 3A to determine stack gas molecular weight at 

the Line 2 Waste Gas stacks. Integrated stack gas samples will be 

collected in Tedlar bag and analyzed with instrument calibrated per EPA 

Method 3A. 
4

Test methods 

Method 4 EPA Method 4 for determination of moisture content in stack gas will be 

performed in conjunction with sulfuric acid mist. 

Method 5 EPA Method 5 for the determination of filterable particulate matter. Three 

test runs of 60 minutes each and obtaining >32 dscf sample volume. 

Condensible 

Particulate 

 Method 202 

Condensible particulates determined from using the dry impinger method in 

conjunction with the EPA Method 5. 

EPA Method 9 Visible emission determined with one 60 minute test consisting of 240 

readings by certified opacity observer weather conditions permitting. 

Method 8 

Sulfuric Acid 

Mist/SO2

EPA Method 8 for the determination of sulfuric acid mist and sulfur dioxide. 

Three tests run each to determine sulfuric acid mist and sulfur dioxide 

concentrations. 

Part V: Continuous Emissions Monitors 

SO2 and NOx CEMS systems are located on the Line 1 Waste Gas Stack. 

Part VI: Other 

Sulfuric acid mist (SAM) emissions will be reported in concentration and lb/hour. A ratio of SAM to 

sulfur dioxide will be provided. 

Test Dates: tests scheduled for October 18-20, 2011. The proposed test schedule follows1:

Monday 

October 17, 2011 

Tuesday 

October 18, 2011 

Wednesday 

October 19, 2011 

Thursday 

October 20, 2011 

Friday 

October 21, 2011

Travel/Setup Line 1 WGS 

(SV046) 

3 - runs for sulfuric 

acid mist /SO2

on Gas 

0700-1500

Line 1 WGS 

(SV046) 

3 - runs for sulfuric 

acid mist /SO2

on Solid Fuel 

0700-1500

Line 1 WGS 

(SV046) 

3 - runs for 

PM/PM2.5, PM10 a 

one 1-hour opacity 

0700-1600

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 7 days in advance of the testing. At the preference of the MPCA, United Taconite 

suggests the pretest meeting be conducted by telephone. 

Maintenance: A description of any necessary 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 45 days from last test date of the mobilization. 

Test plans and report submittals will be addressed to: 

Andrew Place 
5

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 

Section Manager - Environmental Affairs 

United Taconite, LLC 

Attachments: 

Figure 1—Test port location drawings (SV046, EU040)

c: Dan Koschak—Barr Engineering Company 
2

Cc: 'Tom Kuchinski'; Weidemann, Lisa L.; Dan Koschak 

Subject: RE: Test Postponement 

Good Morning Andy, 

United Taconite is going to try and complete the Line 1 PM and SAM testing this week that was originally scheduled for 

October but was postponed. Please let us know if you need any additional information or would like to hold another 

pre-test meeting. 

Thank you, 

Candice 

 

Candice Maxwell

Section Manager - Environmental Affairs 

P 218.744.7849 F 218.744.7635 candice.maxwell@cliffsnr.com

CLIFFS NATURAL RESOURCES 

United Taconite LLC 

PO Box 180, Eveleth, MN 55734

From: Place, Andrew (MPCA) [mailto:Andrew.Place@state.mn.us] 

Sent: Tuesday, October 18, 2011 12:58 PM 

To: Maxwell, Candice A. 

Subject: Test Postponement 

Candice, 

Sorry, I listened to your message before going to a meeting this morning and then forgot to get back to you. Thank you 

for the update. I guess when you have a new date set, let me know. I don’t think I have any other questions at this 

time. 

Andy Place 

Performance Test Coordinator

Minnesota Pollution Control Agency 

520 Lafayette Road 

St. Paul, MN 55155-4194 

651-757-2652 

Andrew.Place@state.mn.us

__________________________________________________________________________________________

____________ 

This electronic message and any attachments included with this message are for the exclusive use of the 

individual or entity to which it is intended to be addressed. This message may contain information that is 

privileged or confidential and thereby exempt and protected from unauthorized disclosure under applicable law. 

If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering the 

message to the intended recipient, be aware that any disclosure, dissemination, distribution or copying of this 

communication, or the use of its contents, is not authorized and is strictly prohibited. If you have received this 

communication and are not the intended recipient, please notify the sender immediately and permanently delete 

the original message from your e-mail system. 
1

Ryan Pantzke

From: Maxwell, Candice A. [Candice.Maxwell@CliffsNR.com]

Sent: Friday, September 09, 2011 7:20 AM

To: Place, Andrew

Cc: Dan Koschak; Tom Kuchinski

Subject: Line 1 SAM / PM Test Plan

Attachments: Line 1 Waste Gas (SV046) PM and SAM Test Protocol.docx; Line 1 Test Port Location.pdf

Good Morning Andy, 

Attached is United Taconite’s test plan for SAM, PM, and Opacity testing on Line 1. Please let me know if you have any 

questions or require any additional information. 

Thanks, 

Candice 

 

Candice Maxwell 

Section Manager - Environmental Affairs 

P 218.744.7849 F 218.744.7635 candice.maxwell@cliffsnr.com

CLIFFS NATURAL RESOURCES 

United Taconite LLC 

PO Box 180, Eveleth, MN 55734

__________________________________________________________________________________________

____________ 

This electronic message and any attachments included with this message are for the exclusive use of the 

individual or entity to which it is intended to be addressed. This message may contain information that is 

privileged or confidential and thereby exempt and protected from unauthorized disclosure under applicable law. 

If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering the 

message to the intended recipient, be aware that any disclosure, dissemination, distribution or copying of this 

communication, or the use of its contents, is not authorized and is strictly prohibited. If you have received this 

communication and are not the intended recipient, please notify the sender immediately and permanently delete 

the original message from your e-mail system. 

__________________________________________________________________________________________

____________ 
Appendix I 

Project Participants and Contact Information 
#23691092 

Project Participants and Contact Information 

Minnesota Pollution Control Agency

Andrew Place – Performance Test Coordinator 

United Taconite, LLC

Candice Maxwell – Section Manager – Environmental Affairs 

Lisa Weidemann – Environmental Coordinator 

Barr Engineering Company

Tim Russell – Vice President/Chemical Engineer 

Tom Kuchinski – Stack Test Supervisor 

Dan Koschak – Senior Air Quality Technician/Project Manager 

Ryan Pantzke – Air Quality Technician 

Tom Leier – Air Quality Technician 

Matt Morrison – Air Quality Technician 

CONTACT INFORMATION 

MPCA 

Andrew Place 

Performance Test Coordinator 

Compliance and Enforcement 

Section—Industrial Division 

Minnesota Pollution Control 

Agency 

520 Lafayette Rd. N. 

Saint Paul, Minnesota 55155 

(651) 296-7169

andrew.place@state.mn.us

United Taconite, LLC 

Candice Maxwell 

Section Manager - Environmental 

Affairs 

1200 West Hwy 6 

Forbes, MN 55738 

(218) 744-7849 

Candice.Maxwell@cliffsNR.com

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