draft/proposed air emission permit no. 13700027 009 …

TDD (for hearing and speech impaired only): (651) 282‐5332 Printed on recycled paper containing at least 10% fibers from paper recycled by consumers

DRAFT/PROPOSED

AIR EMISSION PERMIT NO. 13700027‐009 Major Amendment

IS ISSUED TO

Hibbing Public Utilities Commission/Laurentian Energy Authority LLC

Hibbing Public Utilities Commission 1902 6th Avenue East

Hibbing, St. Louis County, Minnesota 55746 The emission units, control equipment and emission stacks at the stationary source authorized in this permit amendment are as described in the Permit Applications Table. This permit amendment supersedes Air Emission Permit No. 13700027‐008 and authorizes the Permittee to operate and modify the stationary source at the address listed above unless otherwise noted in Table A. The Permittee must comply with all the conditions of the permit. Any changes or modifications to the stationary source must be performed in compliance with Minn. R. 7007.1150 to 7007.1500. Terms used in the permit are as defined in the state air pollution control rules unless the term is explicitly defined in the permit. Unless otherwise indicated, all the Minnesota rules cited as the origin of the permit terms are incorporated into the SIP under 40 CFR § 52.1220 and as such as are enforceable by U.S. Environmental Protection Agency (EPA) Administrator or citizens under the Clean Air Act. Permit Type: Federal Permit; Part 70/Major for NSR; True Minor for NSR Operating Permit Issue Date: January 18, 2012 Major Amendment Issue Date: <issue date> Expiration Date: January 18, 2017 – Title I Conditions do not expire.

Don Smith, P.E., Manager Air Quality Permits Section Industrial Division for John Linc Stine Commissioner Minnesota Pollution Control Agency

Permit Applications Table

Permit Type Application Date Permit Action

Total Facility Operating Permit ‐ Reissuance December 28, 2009 008

Major Amendment (Primary) Administrative Amendment

November 10, 2014 October 9, 2013

009

TABLE OF CONTENTS

Notice to the Permittee Permit Shield Facility Description Amendment Description Table A: Limits and Other Requirements Table B: Submittals Table C: Compliance Schedule ‐ Not used in this permit Appendices

Appendix A: Operator’s Summary ‐ Not used in this permit

Appendix B: Insignificant Activities

Appendix C: Modeling Information (Wood‐Fired Boiler Installation)

Appendix D: Modeling Information (1‐hour Nitrogen Dioxide [NO2] and Sulfur Dioxide [SO2] National Ambient Air Quality Standards [NAAQS] Demonstration)

NOTICE TO THE PERMITTEE: Your stationary source may be subject to the requirements of the Minnesota Pollution Control Agency’s (MPCA) solid waste, hazardous waste, and water quality programs. If you wish to obtain information on these programs, including information on obtaining any required permits, please contact the MPCA general information number at: Metro Area 651‐296‐6300 Outside Metro Area 1‐800‐657‐3864 TTY 651‐282‐5332 The rules governing these programs are contained in Minn. R. chs. 7000‐7105. Written questions may be sent to: Minnesota Pollution Control Agency, 520 Lafayette Road North, St. Paul, Minnesota 55155‐4194. Questions about this air emission permit or about air quality requirements can also be directed to the telephone numbers and address listed above. PERMIT SHIELD: Subject to the limitations in Minn. R. 7007.1800, compliance with the conditions of this permit shall be deemed compliance with the specific provision of the applicable requirement identified in the permit as the basis of each condition. Subject to the limitations of Minn. R. 7007.1800 and 7017.0100, subp. 2, notwithstanding the conditions of this permit specifying compliance practices for applicable requirements, any person (including the Permittee) may also use other credible evidence to establish compliance or noncompliance with applicable requirements. FACILITY DESCRIPTION: The Hibbing Public Utilities Commission (HPUC) operates a co‐generation facility for the city of Hibbing. The facility generates electricity that is sold to the grid and steam for space heating of businesses, schools, and residences. The HPUC power plant is located in downtown Hibbing and was originally constructed in 1919. The emission units at the source consist of three coal/natural gas‐fired boilers, a wood‐fired boiler, an ash‐handling system, as well as the two natural gas‐fired boilers located a few blocks away at Hibbing High School. The high school boilers are connected to the HPUC steam distribution system. The six boilers are labeled Boiler No. 1A, Boiler No. 2A, Boiler No. 3A, High School Boiler No. 1, High School Boiler No. 2, and Wood Fired Boiler. Other air emission sources at the facility include a railcar/truck coal unloading station and an ash transfer system.

AMENDMENT DESCRIPTION: Permit Action 009: This permit action is for a major amendment application received on November 10, 2014. The amendment is for the installation of an 80 million British thermal units (MMBtu) per hour natural gas auxiliary burner on the existing Wood‐fired Boiler (EU 007). The auxiliary burner will allow for the use of natural gas as a supplemental fuel during startup and shutdown activities. Natural gas will also be used as a supplemental fuel on occasion to stabilize combustion of the wood during wet periods when the wood fuel received has higher moisture content. The proposed burner will be a low‐Nitrogen Oxides (NOX) design. The addition of the auxiliary burner does not increase the rated capacity of the boiler and only allows for combustion of natural gas up to 80 MMBtu per hour of the maximum nameplate capacity of 230 MMBtu per hour. The HPUC is also requesting that the permitted allowable SO2 emission rate for each of the coal boilers (EU 001, EU 002, and EU 003) be lowered from 1.58 lb/MMbtu heat input to 0.90 lb/MMbtu heat input. The original SO2 emission rate was based on a higher sulfur content coal than what is currently being used at the facility. The lower allowable emission rate allows HPUC to demonstrate compliance with the 1‐hour SO2 national ambient air quality standards (NAAQS). Unrelated to the changes requested by the major amendment, HPUC also submitted a modeling demonstration to show compliance with the 1‐hour NO2 and SO2 NAAQS. The initial modeling protocol, received on June 6, 2014, was approved on July 30, 2014. The final modeling report, that contained the results of the modeling demonstration, was approved December 11, 2014. These results are included in this permit action as an appendix that contains the modeled parameters and the predicted impacts and modeled pollutant concentrations. The October 9, 2013 administrative amendment requested updated test dates and frequencies for the coal ash silo (EU 004), the wood conveyor system (EU 010), and the wood transfer/metering bin (EU 011). These emission units were required to be tested once every 12, 60, and 36 months, respectively and were last tested on July 30, 2014; May 22, 2012; and May 23, 2012, respectively. The permit was updated to reflect the most recent test date and testing frequency established by the initial performance test done for each of these emission units. There are no emissions increases associated with these amendments. In addition, this permit action incorporates three MPCA initiated re‐openings for updating operating parameter limits and establishing performance test frequencies. The updated operating parameters are the pressure drop range for a material handling baghouse (CE 011) and the total power input required for an electrostatic precipitator (CE 006).

TABLE A: LIMITS AND OTHER REQUIREMENTSHibbing Public Utilities Commission

13700027 - 009

Facility Name:

Permit Number:

03/19/15A-1

Table A contains limits and other requirements with which your facility must comply. The limits are located in the first column ofthe table (What To do). The limits can be emission limits or operational limits. This column also contains the actions that you musttake and the records you must keep to show that you are complying with the limits. The second column of Table A (Why to do it)lists the regulatory basis for these limits. Appendices included as conditions of your permit are listed in Table A under total facilityrequirements.

Subject Item: Total Facility

What to do Why to do it

SOURCE-SPECIFIC REQUIREMENTS hdr

The Permittee shall comply with the applicable requirements of Minn. R.7007.0502. The Permittee shall submit a Mercury Reduction Plan by June 30,2015, for approval and inclusion in a permit or other enforceable document. Thedeadline for complying with the mercury reductions required by Minn. R. 7007.0502is January 1, 2018.

Minn. R. 7007.0502

Permit Appendices: This permit contains appendices as listed in the permit Table ofContents.

The Permittee shall comply with all requirements contained in Appendix B:Insignificant Activities.

Modeling parameters in Appendix C: Modeling Information (Wood-Fired BoilerInstallation) are included for reference only as described elsewhere in Table A.

Modeling parameters in Appendix D: Modeling Information (1-hour NO2 and SO2NAAQS Demonstration) are included for reference only as described elsewhere inTable A.

Minn. R. 7007.0800, subp. 2

Modeled Parameters for NO2, CO, and PM10: The parameters used in NO2, CO,and PM10 modeling for permit number 13700027-005 are listed in Appendix C ofthis permit. The parameters describe the operation of the facility at maximumpermitted capacity. The purpose of listing the parameters in the appendix is toprovide a benchmark for future changes.

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

Changes to Modeled Parameters for PM10: Any permit amendment that affects anymodeled parameter or emission rate for PM10 listed in Appendix C, or an additionto the information documented in Appendix C, requires a major amendment.


Equivalent or Better Dispersion (EBD) Modeling Triggers (Modeling Required) forPM10: Changes that affect any modeled parameter or emission rate listed inAppendix C, or an addition to the information documented in Appendix C, triggerthe EBD Modeling Submittal requirement.


EBD Modeling Submittal for PM10: For changes meeting the criteria in the EBDModeling Triggers (Modeling Required) requirement, the Permittee shall submit anEBD modeling submittal in accordance with the current version of the MPCA AirDispersion Modeling Guidance and shall wait for written approval (in the form of anissued permit amendment) before making such changes.


EBD Modeling Submittal Content for PM10: The information submitted mustinclude, for stack and vent sources, source emission rate, location, height,diameters, exit velocity, exit temperature, discharge direction, use of rain caps orrain hats, and, if applicable, locations and dimensions of nearby buildings. Fornon-stack/vent sources, this includes the source emission rate, location, size andshape, release height, and, if applicable, any emission rate scalars, and the initiallateral dimensions and initial vertical dimensions and adjacent building heights.


Outdated EBD Baseline Modeling for PM10: Prior to conducting the EBD analysis,the Permittee shall use the current version of the MPCA Air Dispersion ModelingGuidance to determine if the Baseline Modeling (the most recent refined modelingdemonstration) is outdated. If the Baseline Modeling is outdated, the Permitteeshall update the Baseline Modeling to be consistent with the current version of theMPCA Air Dispersion Modeling Guidance. The updated modeling will become thenew Baseline Modeling.

This requirement does not require the Permittee to complete a new refinedmodeling demonstration using the revisions made for the EBD demonstration.


EBD Modeling Results for PM10: The dispersion characteristics due to therevisions of the information in Appendix C must be equivalent to or better than thedispersion characteristics modeled and approved in Permit 13700027-005. ThePermittee shall demonstrate this equivalency in the proposal.



13700027 - 009

Facility Name:

Permit Number:

03/19/15A-2

Computer Dispersion Modeling Triggers for PM10: The Permittee shall conduct arefined remodeling analysis in accordance with the Computer Dispersion Modelingrequirements of this permit and the current version of the MPCA Air DispersionModeling Guidance if: (1) the results of the EBD modeling analysis do notdemonstrate equivalent or better dispersion characteristics; (2) a conclusion cannotreadily be made about the dispersion, or (3) the criteria in the EBD ModelingTriggers requirement are met and the Permittee has previously conducted threesuccessive EBD analyses using the same Baseline Modeling.


Computer Dispersion Modeling Protocol: due 180 days after receipt of writtenMPCA request for PM10 refined modeling. The Permittee shall submit a ComputerDispersion Modeling Protocol that is complete and approvable by MPCA by thedeadline in this requirement. This protocol will describe the proposed modelingmethodology and input data, in accordance with the current version of the MPCAAir Dispersion Modeling Guidance.


Computer Dispersion Modeling Protocol: due 60 days after receipt of written MPCArequest for revisions to the submitted protocol for PM10 modeling.


Computer Dispersion Modeling Results: due 180 days after receipt of written MPCAapproval of Computer Dispersion Modeling Protocol for PM10. The Permittee shallsubmit a final Computer Dispersion Modeling Report that is complete andapprovable by MPCA by the deadline in this requirement. The submittal shalladhere to the current version of the MPCA Air Dispersion Modeling Guidance andthe approved Computer Dispersion Modeling Protocol.


Modeled Parameters for NO2 and SO2: The parameters used in NO2 and SO2modeling for permit number 13700027-009 are listed in Appendix D of this permit.The parameters describe the operation of the facility at maximum permittedcapacity. The purpose of listing the parameters in the appendix is to provide abenchmark for future changes.

Minn. Stat. Section 116.07, subds. 4a & 9; Minn. R.7007.0100, subp. 7(A), 7(L), & 7(M); Minn. R.7007.0800, subp. 1; Minn. R. 7007.0800, subp. 2;Minn. R. 7007.0800, subp. 4; Minn. R.7009.0010-7009.0080

Equivalent or Better Dispersion (EBD) Modeling Triggers (Modeling Not Required)for SO2: Changes that do not require a permit amendment or that require a minoror administrative permit amendment do not trigger the EBD Modeling Submittalrequirement. The Permittee shall keep updated records on site of all modeled SO2parameters and emission rates listed in Appendix D. The Permittee shall submitany changes to modeled SO2 parameters and emission rates with the nextrequired modeling submittal.


EBD Modeling Triggers (Modeling Required) for SO2: Changes that require, orwould require, a moderate or major permit amendment due to an increase in SO2emissions and affect any modeled SO2 parameter or emission rate listed inAppendix D, or an addition to the information documented in Appendix D, triggerthe EBD Remodeling Submittal requirement. The Permittee shall include previouslymade changes to modeled SO2 parameters and emission rates listed in AppendixD that did not previously trigger the EBD Modeling Submittal requirement with thismodeling submittal.


EBD Modeling Submittal for SO2: For changes meeting the criteria in the EBDModeling Triggers (Modeling Required) requirement, the Permittee shall submit anEBD modeling submittal in accordance with the current version of the MPCA AirDispersion Modeling Guidance and shall wait for written approval (for majoramendments, in the form of an issued permit amendment; for moderateamendments, in the form of a construction authorization letter) before making suchchanges.


Equivalent or Better Dispersion (EBD) Modeling Triggers (Modeling Not Required)for NO2: Changes that do not require a permit amendment or require anadministrative permit amendment do not trigger the EBD Modeling Submittalrequirement. The Permittee shall keep updated records on site of all modeled NO2parameters and emission rates listed in Appendix D. The Permittee shall submitany changes to modeled NO2 parameters and emission rates with the nextrequired modeling submittal.


EBD Modeling Triggers (Modeling Required) for NO2: Changes that require, orwould require, a minor, moderate, or major permit amendment due to an increasein NO2 emissions and affect any modeled NO2 parameter or emission rate listed inAppendix D, or an addition to the information documented in Appendix D, triggerthe EBD Remodeling Submittal requirement. The Permittee shall include previouslymade changes to modeled NO2 parameters and emission rates listed in AppendixD that did not previously trigger the EBD Modeling Submittal requirement with thismodeling submittal.



13700027 - 009

Facility Name:

Permit Number:

03/19/15A-3

EBD Modeling at Reissuance for NO2: The Permittee shall submit an EBDModeling Submittal with the permit reissuance application (due as stated elsewherein this permit) that addresses any changes made during the permit term that did notrequire a permit amendment but that affected any modeled NO2 parameter oremission rate documented in Appendix D, or an addition to the informationdocumented in Appendix D and that did not trigger the EBD Modeling Triggers(Modeling Required) requirement.


EBD Modeling Submittal for NO2: For changes meeting the criteria in the EBDModeling Triggers (Modeling Required) requirement, the Permittee shall submit anEBD modeling submittal in accordance with the current version of the MPCA AirDispersion Modeling Guidance and shall wait for written approval (for majoramendments, in the form of an issued permit amendment; for moderateamendments, in the form of a construction authorization letter) before making suchchanges. For minor amendments, written approval of the EBD modeling may begiven before permit issuance; however, this approval applies only to the EBDmodeling and not to any other changes.


EBD Modeling Submittal Content for NO2 and/or SO2: The information submittedmust include, for stack and vent sources, source emission rate, location, height,diameters, exit velocity, exit temperature, discharge direction, use of rain caps orrain hats, and, if applicable, locations and dimensions of nearby buildings. Fornon-stack/vent sources, this includes the source emission rate, location, size andshape, release height, and, if applicable, any emission rate scalars, and the initiallateral dimensions and initial vertical dimensions and adjacent building heights.


Outdated EBD Baseline Modeling for NO2 and/or SO2: Prior to conducting the EBDanalysis, the Permittee shall use the current version of the MPCA Air DispersionModeling Guidance to determine if the Baseline Modeling (the most recent refinedmodeling demonstration) is outdated. If the Baseline Modeling is outdated, thePermittee shall update the Baseline Modeling to be consistent with the currentversion of the MPCA Air Dispersion Modeling Guidance. The updated modeling willbecome the new Baseline Modeling.

This requirement does not require the Permittee to complete a new refinedmodeling demonstration using the revisions made for the EBD demonstration.


EBD Modeling Results for NO2 and/or SO2: The dispersion characteristics due tothe revisions of the information in Appendix D must be equivalent to or better thanthe dispersion characteristics modeled and approved in the December 11, 2014(most recent) modeling report. The Permittee shall demonstrate this equivalency inthe proposal.


Computer Dispersion Modeling Triggers for NO2 and/or SO2: The Permittee shallconduct a refined remodeling analysis in accordance with the Computer DispersionModeling requirements of this permit and the current version of the MPCA AirDispersion Modeling Guidance if: (1) the results of the EBD modeling analysis donot demonstrate equivalent or better dispersion characteristics; (2) a conclusioncannot readily be made about the dispersion, or (3) the criteria in the EBD ModelingTriggers requirement are met and the Permittee has previously conducted threesuccessive EBD analyses using the same Baseline Modeling.

Minn. Stat. Section 116.07, subds. 4a & 9; Minn. R.7009.0020; Minn. R. 7007.0100, subp. 7(A), 7(L), &7(M); Minn. R. 7007.0800, subp. 2

Computer Dispersion Modeling Protocol: due 180 days after receipt of writtenMPCA request for NO2 and/or SO2 refined modeling. The Permittee shall submit aComputer Dispersion Modeling Protocol that is complete and approvable by MPCAby the deadline in this requirement. This protocol will describe the proposedmodeling methodology and input data, in accordance with the current version of theMPCA Air Dispersion Modeling Guidance.


Computer Dispersion Modeling Protocol: due 60 days after receipt of written MPCArequest for revisions to the submitted protocol for NO2 and/or SO2 modeling.


Computer Dispersion Modeling Results: due 180 days after receipt of written MPCAapproval of Computer Dispersion Modeling Protocol for NO2 and/or SO2. ThePermittee shall submit a final Computer Dispersion Modeling Report that iscomplete and approvable by MPCA by the deadline in this requirement. Thesubmittal shall adhere to the current version of the MPCA Air Dispersion ModelingGuidance and the approved Computer Dispersion Modeling Protocol.


DETERMINING IF A PROJECT/MODIFICATION IS SUBJECT TO NEW SOURCEREVIEW

hdr


13700027 - 009

Facility Name:

Permit Number:

03/19/15A-4

These requirements apply if a reasonable possibility (RP) as defined in 40 CFRSection 52.21(r)(6)(vi) exists that a proposed project, analyzed using theactual-to-projected-actual (ATPA) test (either by itself or as part of the hybrid test atSection 52.21(a)(2)(iv)(f)) and found to not be part of a major modification, mayresult in a significant emissions increase (SEI). If the ATPA test is not used for theproject, or if there is no RP that the proposed project could result in a SEI, theserequirements do not apply to that project. The Permittee is only subject to thePreconstruction Documentation requirement for a project where a RP occurs onlywithin the meaning of Section 52.21(r)(6)(vi)(b).

Even though a particular modification is not subject to New Source Review (NSR),or where there isn't a RP that a proposed project could result in a SEI, a permitamendment, recordkeeping, or notification may still be required by Minn. R.7007.1150 - 7007.1500.

Title I Condition: 40 CFR Section 52.21(r)(6); Minn. R.7007.3000; Minn. R. 7007.0800, subp. 2

Preconstruction Documentation -- Before beginning actual construction on aproject, the Permittee shall document the following:

1. Project description2. Identification of any emission unit (EU) whose emissions of an NSR pollutantcould be affected3. Pre-change potential emissions of any affected existing EU, and the projectedpost-change potential emissions of any affected existing or new EU.4. A description of the applicability test used to determine that the project is not amajor modification for any regulated NSR pollutant, including the baseline actualemissions, the projected actual emissions, the amount of emissions excluded dueto increases not associated with the modification and that the EU could haveaccommodated during the baseline period, an explanation of why the amountswere excluded, and any creditable contemporaneous increases and decreases thatwere considered in the determination.

The Permittee shall maintain records of this documentation.

Title I Condition: 40 CFR Section 52.21(r)(6); Minn. R.7007.3000; Minn. R. 7007.1200, subp. 4; Minn. R.7007.0800, subps. 4-5

The Permittee shall monitor the actual emissions of any regulated NSR pollutantthat could increase as a result of the project and that were analyzed using theATPA test, and the potential emissions of any regulated NSR pollutant that couldincrease as a result of the project and that were analyzed using potential emissionsin the hybrid test. The Permittee shall calculate and maintain a record of the sum ofthe actual and potential (if the hybrid test was used in the analysis) emissions of theregulated pollutant, in tons per year on a calendar year basis, for a period of 5years following resumption of regular operations after the change, or for a period of10 years following resumption of regular operations after the change if the projectincreases the design capacity of or potential to emit of any unit associated with theproject.

Title I Condition: 40 CFR Section 52.21(r)(6); Minn. R.7007.3000; Minn. R. 7007.0800, subps. 4-5

The Permittee must submit a report to the Agency if the annual summed (actual,plus potential if used in hybrid test) emissions differ from the preconstructionprojection and exceed the baseline actual emissions by a significant amount aslisted at 40 CFR Section 52.21(b)(23). Such report shall be submitted to theAgency within 60 days after the end of the year in which the exceedances occur.The report shall contain:

a. The name and ID number of the facility, and the name and telephone number ofthe facility contact personb. The annual emissions (actual, plus potential if any part of the project wasanalyzed using the hybrid test) for each pollutant for which the preconstructionprojection and significant emissions increase are exceeded.c. Any other information, such as an explanation as to why the summed emissionsdiffer from the preconstruction projection.

Title I Condition: 40 CFR Section 52.21(r)(6); Minn. R.7007.3000; Minn. R. 7007.0800, subps. 4-5

OPERATIONAL REQUIREMENTS hdr

The Permittee shall comply and demonstrate compliance with National Primary andSecondary Ambient Air Quality Standards, 40 CFR pt. 50 and the MinnesotaAmbient Air Quality Standards, Minn. R. 7009.0010 to 7009.0800.

40 CFR pt. 50; Minn. Stat. Section 116.07, subds. 4a &9; Minn. R. 7007.0100, subp. 7(A), 7(L), & 7(M); Minn.R. 7007.0800, subp. 1; Minn. R. 7007.0800, subp. 2;Minn. R. 7007.0800, subp. 4; Minn. R.7009.0010-7009.0080

Circumvention: Do not install or use a device or means that conceals or dilutesemissions, which would otherwise violate a federal or state air pollution control rule,without reducing the total amount of pollutant emitted.

Minn. R. 7011.0020

Air Pollution Control Equipment: Operate all pollution control equipment wheneverthe corresponding process equipment and emission units are operated, unlessotherwise noted in Table A.

Minn. R. 7007.0800, subp. 2; Minn. R. 7007.0800,subp. 16(J)


13700027 - 009

Facility Name:

Permit Number:

03/19/15A-5

Operation and Maintenance Plan: Retain at the stationary source an operation andmaintenance plan for all air pollution control equipment. At a minimum, the O & Mplan shall identify all air pollution control equipment and control practices and shallinclude a preventative maintenance program for the equipment and practices, adescription of (the minimum but not necessarily the only) corrective actions to betaken to restore the equipment and practices to proper operation to meet applicablepermit conditions, a description of the employee training program for properoperation and maintenance of the control equipment and practices, and the recordskept to demonstrate plan implementation.

Minn. R. 7007.0800, subp. 14; Minn. R. 7007.0800,subp. 16(J)

Operation Changes: In any shutdown, breakdown, or deviation the Permittee shallimmediately take all practical steps to modify operations to reduce the emission ofany regulated air pollutant. The Commissioner may require feasible and practicalmodifications in the operation to reduce emissions of air pollutants. No emissionsunits that have an unreasonable shutdown or breakdown frequency of process orcontrol equipment shall be permitted to operate.

Minn. R. 7019.1000, subp. 4

Fugitive Emissions: Do not cause or permit the handling, use, transporting, orstorage of any material in a manner which may allow avoidable amounts ofparticulate matter to become airborne. Comply with all other requirements listed inMinn. R. 7011.0150.

Minn. R. 7011.0150

Comply with Fugitive Emission Control Plan: The Permittee shall follow the actionsand recordkeeping specified in the control plan. The plan may be amended by thePermittee with the Commissioner's approval. If the Commissioner determines thePermittee is out of compliance with Minn. R. 7011.0150 or the fugitive control plan,then the Permittee may be required to amend the control plan and/or to install andoperate particulate matter ambient monitors as requested by the Commissioner.

Minn. Stat. Section 116.07, subd. 4a; Minn. R.7007.0100; Minn. R. 7007.0800, subp. 2; Minn. R.7011.0150; Minn. R. 7009.0020

Noise: The Permittee shall comply with noise standards set forth in Minn. R.7030.0010 to 7030.0080 at all times during operation of any emission units. This isa state requirement only and is not enforceable by the EPA Administrator orcitizens under the Clean Air Act.

Minn. R. 7030.0010 - 7030.0080

Inspections: The Permittee shall comply with the inspection procedures andrequirements as found in Minn. R. 7007.0800, subp. 9(A).

Minn. R. 7007.0800, subp. 9(A)

The Permittee shall comply with the General Conditions listed in Minn. R.7007.0800, subp. 16.

Minn. R. 7007.0800, subp. 16

PERFORMANCE TESTING hdr

Performance Testing: Conduct all performance tests in accordance with Minn. R.ch. 7017 unless otherwise noted in Tables A, B, and/or C.

Minn. R. ch. 7017

Performance Test (or Fuel Analyses for those pollutants not tested for) Notificationsand Submittals;

Performance Test Notification (written): due 30 days before each Performance Testfor the existing boilers, due 60 days prior to testing for the wood fired boiler.Performance Test Plan: due 30 days before each Performance Test for the existingboilers, due 60 days prior to testing for the wood fired boiler.Performance Test Pre-Test Meeting: due 7 day before each Performance TestPerformance Test Report: due 45 days after each Performance TestPerformance Test Report - Microfiche Copy or CD: due 105 day after eachPerformance Test.The Notification, Test Plan, and Test Report may be submitted in alternative formatas allowed by Minn. R. 7017.2018.

For the Wood Fired Boiler, the Performance Test Report or Fuel Analysis Reportmust include the information in 40 CFR Section 63.7545(e).

Minn. R. 7017.2018; Minn. R. 7017.2030, subps. 1-4;Minn. R. 7017.2035, subps. 1-2

Limits set as a result of a performance test (conducted before or after permitissuance) apply until superseded as stated in the MPCA's Notice of Complianceletter granting preliminary approval. Preliminary approval is based on formal reviewof a subsequent performance test on the same unit as specified by Minn. R.7017.2025, subp. 3. The limit is final upon issuance of a permit amendmentincorporating the change.

Minn. R. 7017.2025, subp. 3

MONITORING REQUIREMENTS hdr

Monitoring Equipment Calibration: Annually calibrate all required monitoringequipment (any requirements applying to continuous emission monitors are listedseparately in this permit).

Minn. R. 7007.0800, subp. 4(D)

Operation of Monitoring Equipment: Unless otherwise noted in Tables A, B, and/orC, monitoring a process or control equipment connected to that process is notnecessary during periods when the process is shutdown, or during checks of themonitoring systems, such as calibration checks and zero and span adjustments. Ifmonitoring records are required, they should reflect any such periods of processshutdown or checks of the monitoring system.

Minn. R. 7007.0800, subp. 4(D)


13700027 - 009

Facility Name:

Permit Number:

03/19/15A-6

RECORDKEEPING hdr

Recordkeeping: Retain all records at the stationary source for a period of five (5)years from the date of monitoring, sample, measurement, or report. Records whichmust be retained at this location include all calibration and maintenance records, alloriginal strip-chart recordings for continuous monitoring instrumentation, and copiesof all reports required by the permit. Records must conform to the requirementslisted in Minn. R. 7007.0800, subp. 5(A).

Minn. R. 7007.0800, subp. 5(C)

Recordkeeping: Maintain records describing any insignificant modifications (asrequired by Minn. R. 7007. 1250, subp. 3) or changes contravening permit terms(as required by Minn. R. 7007.1350 subp. 2), including records of the emissionsresulting from those changes.

Minn. R. 7007.0800, subp. 5(B)

If the Permittee determines that no permit amendment or notification is requiredprior to making a change, the Permittee must retain records of all calculationsrequired under Minn. R. 7007.1200. For expiring permits, these records shall bekept for a period of five years from the date the change was made or until permitreissuance, whichever is longer. The records shall be kept at the stationary sourcefor the current calendar year of operation and may be kept at the stationary sourceor office of the stationary source for all other years. The records may be maintainedin either electronic or paper format.

Minn. R. 7007.1200, subp. 4

REPORTING/SUBMITTALS hdr

Shutdown Notifications: Notify the Commissioner at least 24 hours in advance of aplanned shutdown of any control equipment or process equipment if the shutdownwould cause any increase in the emissions of any regulated air pollutant. If theowner or operator does not have advance knowledge of the shutdown, notificationshall be made to the Commissioner as soon as possible after the shutdown.However, notification is not required in the circumstances outlined in Items A, Band C of Minn. R. 7019.1000, subp. 3.

At the time of notification, the owner or operator shall inform the Commissioner ofthe cause of the shutdown and the estimated duration. The owner or operator shallnotify the Commissioner when the shutdown is over.

Minn. R. 7019.1000, subp. 3

Breakdown Notifications: Notify the Commissioner within 24 hours of a breakdownof more than one hour duration of any control equipment or process equipment ifthe breakdown causes any increase in the emissions of any regulated air pollutant.The 24-hour time period starts when the breakdown was discovered or reasonablyshould have been discovered by the owner or operator. However, notification is notrequired in the circumstances outlined in Items A, B and C of Minn. R. 7019.1000,subp. 2.

At the time of notification or as soon as possible thereafter, the owner or operatorshall inform the Commissioner of the cause of the breakdown and the estimatedduration. The owner or operator shall notify the Commissioner when thebreakdown is over.

Minn. R. 7019.1000, subp. 2

Notification of Deviations Endangering Human Health or the Environment: As soonas possible after discovery, notify the Commissioner or the state duty officer, eitherorally or by facsimile, of any deviation from permit conditions which could endangerhuman health or the environment.

Minn. R. 7019.1000, subp. 1

Notification of Deviations Endangering Human Health or the Environment Report:Within 2 working days of discovery, notify the Commissioner in writing of anydeviation from permit conditions which could endanger human health or theenvironment. Include the following information in this written description:1. the cause of the deviation;2. the exact dates of the period of the deviation, if the deviation has been corrected;3. whether or not the deviation has been corrected;4. the anticipated time by which the deviation is expected to be corrected, if not yetcorrected; and5. steps taken or planned to reduce, eliminate, and prevent reoccurrence of thedeviation.

Minn. R. 7019.1000, subp. 1

Application for Permit Amendment: If you need a permit amendment, submitapplication in accordance with the requirements of Minn. R. 7007.1150 throughMinn. R. 7007.1500. Submittal dates vary, depending on the type of amendmentneeded.

Minn. R. 7007.1150 - 7007.1500


13700027 - 009

Facility Name:

Permit Number:

03/19/15A-7

For changes that do not require a permit amendment:

- The Permittee shall submit a Part 1 MACT application within 30 days of startup ofany 112(j) affected source. The application shall meet the requirements of 40 CFRSection 63.53(a).

- The Permittee shall submit a Part 2 MACT application within 90 days of startup ofany 112(j) affected source. The application shall meet the requirements of 40 CFRSection 63.53(b).

112(j) affected source is defined in 40 CFR Section 63.51.

At the time of permit issuance, 112(j) affected sources include utility boilers, brickand structural clay products manufacturing, and clay ceramics manufacturing.

40 CFR Section 63.52(b)(1); 40 CFR Section63.52(e)(1)

Extension Requests: The Permittee may apply for an Administrative Amendmentto extend a deadline in a permit by no more than 120 days, provided the proposeddeadline extension meets the requirements of Minn. R. 7007.1400, subp. 1(H).

Minn. R. 7007.1400, subp. 1(H)

Upon adoption of a new or amended federal applicable requirement, and theremaining life of the permit is three years or longer, the Permittee shall file anapplication for an amendment within nine months of promulgation of the applicablerequirement. The preceding sentence does not apply if the effective date of therequirement is later than the date on which the permit is due to expire.

Minn. R. 7007.0400, subp. 3

Emission Inventory Report: due on or before April 1 of each calendar year followingpermit issuance. The Permittee shall submit this on a form approved by theCommissioner.

Minn. R. 7019.3000 - 7019.3100

Emission Fees: due 30 days after receipt of an MPCA bill. Minn. R. 7002.0005 - 7002.0095


13700027 - 009

Facility Name:

Permit Number:

03/19/15A-8

Subject Item: GP 001 Boilers 1A, 2A, and 3A

Associated Items: EU 001 Boiler No. 1A (17.8 MW) - Boiler

EU 002 Boiler No. 2A (17.8 MW) - Boiler

EU 003 Boiler No. 3A (21.4 MW) - Boiler


Fuel Usage: less than or equal to 5000 gallons/year using 12-month Rolling Sum ofused oil. This is a combined usage limit for the 3 boilers included in this group.

Minn. R. 7007.0800, subp. 2

Fuel Usage: less than or equal to 500 lbs/year using 12-month Rolling Sum of oilycellulose-based sorbents (oily rags). This is a combined usage limit for the 3 boilersincluded in this group.

Minn. R. 7007.0800, subp. 2

Each day that used oil is burned in one of the boilers, record the date, the boilernumber (EU 001, EU 002, or EU 003), and the amount of used oil burned.

Minn. R. 7007.0800, subp. 4

Each day that oily cellulose-based sorbents (oily rags) are burned in one of theboilers, record the date, the boiler number (EU 001, EU 002, or EU 003), and theamount of oily cellulose-based sorbents (oily rags) burned.

Minn. R. 7007.0800, subp. 4

By the 15th day of each month, calculate the total amount of used oil that wasburned in the preceding 12 months.

Minn. R. 7007.0800, subp. 4

By the 15th day of each month, calculate the total amount of oily cellulose-basedsorbents (oily rags) that were burned in the preceding 12 months.

Minn. R. 7007.0800, subp. 4


13700027 - 009

Facility Name:

Permit Number:

03/19/15A-9

Subject Item: GP 005 NSPS Continuous Monitoring Systems

Associated Items: MR 010 Wood Boiler Opacity Monitor

MR 011 Wood Boiler NOx Monitor

MR 013 Wood Boiler Oxygen Monitor


Additional monitoring requirements are located at the individual MR levels, EU 007,and in Table B.

The CEMS/COMS requirements listed below outline the typical standards of 40CFR pt. 60 when combined with Minnesota Rules. Additional monitoringrequirements may also apply to the Facility based on this combination of standardsand it is the responsibility of the Facility to meet all applicable requirements.

hdr

Installation Notification: due 60 days before CEMS/COMS installation. Thenotification shall include plans and drawings of the system.

Minn. R. 7017.1040, subp. 1

CEMS/COMS Certification/Recertification Test: due 120 days after the firstcalendar quarter following CEMS/COMS Installation. (This requirement is asstringent as that of Minn. R. 7017.1050, subp. 1 requiring testing within 90 daysafter the due date of the first excess emissions report required for the CEMS orCOMS. If necessary, the COMS Certification test may be completed at the sametime as the 40 CFR pt. 60 performance evaluation provided all applicable deadlinesare met.)

40 CFR Section 60.13(b); Minn. R. 7017.1050, subp. 1

CEMS/COMS Certification Test Plan: due 30 days before CEMS/COMSCertification TestCEMS/COMS Certification Test Pretest Meeting: due 7 days before CEMS/COMSCertification TestCEMS/COMS Certification Test Report: due 45 days after CEMS/COMSCertification TestCEMS/COMS Certification Test Report - Microfiche Copy: due 105 days afterCEMS/COMS Certification Test

The Notification, Test Plan, and Test Report may be submitted in alternate formatas allowed by Minn. R. 7017.1120, subp. 2

40 CFR Section 60.7(a)(5); Minn. R. 7017.1060, subp.1-3; Minn. R. 7017.1080, subp. 1-4

CONTINUOUS EMISSION MONITOR REQUIREMENTS hdr

CEMS Monitor Design: Each CEMS shall be designed to complete a minimum ofone cycle of sampling, analyzing, and data recording in each 15-minute period.

40 CFR Section 60.13(e)(2)

Continuous Operation: CEMS must be operated and data recorded during allperiods of emission unit operation including periods of emission unit start-up,shutdown, or malfunction except for periods of acceptable monitor downtime. Thisrequirement applies whether or not a numerical emission limit applies during theseperiods. A CEMS must not be bypassed except in emergencies where failure tobypass would endanger human health, safety, or plant equipment. No data recordis required for the diluent monitors.

Acceptable monitor downtime includes reasonable periods as listed in Minn. R.7017.1090, subp. 2, items (A) - (D).

40 CFR Section 60.13(e); Minn. R. 7017.1090

QA Plan: Develop and implement a written quality assurance plan that covers eachCEMS. The plan shall be on site and available for inspection within 30 days aftermonitor certification. The plan shall contain all of the information required by 40CFR Part 60, Appendix F, Section 3. The plan shall include the manufacturer'sspare parts list for each CEMS and require that those parts be kept at the facilityunless the Commissioner gives written approval to exclude specific spare partsfrom the list.

40 CFR pt. 60, Appendix F; Section 3; Minn. R.7017.1170, subp. 2

CEMS QA/QC: The owner or operator of an affected facility is subject to theperformance specifications listed in 40 CFR pt. 60, Appendix B and shall operate,calibrate, and maintain each CEMS according to the QA/QC procedures in 40 CFRpt. 60, Appendix F as amended and maintain a written QA/QC program available ina form suitable for inspection.

40 CFR pt. 60, Appendix F; 40 CFR Section 60.13(a)

CEMS Daily Calibration Drift Test: Check the zero (low level value between 0 and20 percent of span value) and span (50 to 100 percent of span value) calibrationdrifts at least once daily. The zero and span must, at a minimum, be adjustedwhenever the drift exceeds two times the limit specified in 40 CFR pt. 60, AppendixB. 40 CFR pt. 60, Appendix F, Section 4.3.1 shall be used to determineout-of-control periods for CEMS.

40 CFR pt. 60, Appendix F, Section 4.1; 40 CFRSection 60.13(d)(1); Minn. R. 7017.1170, subp. 3


13700027 - 009

Facility Name:

Permit Number:

03/19/15A-10

CEMS Cylinder Gas Audit (CGA): Due before the end of each three of fourcalendar quarters following CEM Certification Test but no more than three quartersin succession. A CGA is not required during any calendar quarter in which a RATAwas performed.

40 CFR pt. 60, Appendix F, section 5.1.2; Minn. R.7017.1170, subp. 4

CEMS Relative Accuracy Test Audit (RATA): due before end of every one of fourcalendar quarters following CEM Certification Test.

40 CFR pt. 60, Appendix F, Section 5.1.1; Minn. R.7017.1170, subp. 5

Relative Accuracy Test Audit (RATA) Notification: due 30 days before CEMSRelative Accuracy Test Audit (RATA).

Minn. R. 7017.1180, subp. 2

Recordkeeping: The owner or operator must retain records of all CEMS monitoringdata and support information for a period of five years from the date of themonitoring sample, measurement or report. Records shall be kept at the source.

Minn. R. 7017.1130; 40 CFR Section 60.7(f)

Monitoring Data: Reduce all NSPS-required continuous monitoring systems otherthan COMS data to 1-hour averages, in accordance with 40 CFR Section 60.13(h).

40 CFR Section 60.13(h)

CONTINUOUS OPACITY MONITOR REQUIREMENTS hdr

Monitoring Data: All COMS data must be reduced to six-minute averages.Six-minute opacity averages shall be calculated from 36 or more data pointsequally spaced over each 6-minute period.

40 CFR Section 60.13(e)(1); 40 CFR Section60.13(h)(1); Minn. R. 7017.1200, subps. 1-3

NSPS COMS Performance Evaluation: Due before the performance test requiredunder 40 CFR Section 60.8 is conducted as specified in Performance Specification1, Appendix B of 40 CFR pt. 60. Otherwise, during any performance test requiredunder Section 60.8 or within 30 days thereafter. The owner or operator of anaffected facility shall conduct COMS performance evaluations at such other timesas may be required by the Administrator under Section 114 of the Clean Air Act.(Provided all applicable deadlines are met, the performance evaluation may becompleted at the same time as the Minn. R. required Certification Test.)

40 CFR Section 60.13(c)

Continuous Operation: COMS must be operated and data recorded during allperiods of emission unit operation including periods of emission unit start-up,shutdown, or malfunction except for periods of acceptable monitor downtime. Thisrequirement applies whether or not a numerical emission limit applies during theseperiods. A COMS must not be bypassed except in emergencies where failure tobypass would endanger human health, safety, or plant equipment.

Acceptable monitor downtime includes reasonable periods as listed in Items A, B,C and D of Minn. R. 7017.1090, subp. 2.

40 CFR Section 60.13(e); Minn. R. 7017.1090, subp. 1

QA Plan: Implement a written quality assurance plan that covers each COMS. Theplan shall be on site and available for inspection within 30 days after monitorcertification. The plan shall contain all of the information required by Minn. R.7017.1210, subp. 1. The plan shall include the manufacturer's spare parts list foreach COMS and require that those parts be kept at the facility unless theCommissioner gives written approval to exclude specific spare parts from the list.

Minn. R. 7017.1210, subp. 1

COMS Daily Calibration Drift Test: The Calibration Drift shall be quantified andrecorded at zero (low-level) and upscale (high-level) calibration drift at least oncedaily according to the procedures listed in 40 CFR Section 60.13(d)(2) and pt. 60,Appendix B, PS 1. The zero and upscale calibration levels must be determinedusing the span value specified in the applicable requirement. If the applicablerequirement does not specify a span value, a span value of 60, 70, or 80 percentopacity must be used unless an alternative span value is approved by thecommissioner. 40 CFR pt. 60, Appendix F, shall be used to determineout-of-control periods for COMS.

40 CFR Section 60.13(d)(1); Minn. R. 7017.1210,subp. 2

COMS Attenuator Calibration: The Permittee shall semiannually have anindependent testing company conduct calibrations of each of the neutral densityfilters used in the calibration error audit according to the procedure in 40 CFR pt.60, Appendix B.

40 CFR pt. 60, Appendix B. Section 7; Minn. R.7017.1210, subp. 4

COMS Calibration Error Audit Notification: due 30 days before the COMSCalibration Error Audit.

Minn. R. 7017.1180, subp. 2

COMS Calibration Error Audit: due before end of each calendar half-year starting06/05/2007. Audits are to be at least three months apart but no more than eightmonths apart except that a calibration error audit need not be conducted during anysemiannual period in which the emission unit operated less than 24 hours. Thecalibration error audit shall be conducted according to the procedures in 40 CFR pt.60, Appendix B, PS. 1.

Minn. R. 7017.1210, subp. 3

Recordkeeping: The owner or operator must retain records of all COMS monitoringdata and support information for a period of five years from the date of themonitoring sample, measurement or report. Records shall be kept at the source.

Minn. R. 7017.1130


13700027 - 009

Facility Name:

Permit Number:

03/19/15A-11

Subject Item: GP 006 Non-NSPS Continuous Monitoring Systems

Associated Items: MR 012 Wood Boiler CO Monitor

MR 017 Oxygen Boilers 1A & 2A common stack

MR 018 SO2 Boilers 1A & 2A common stack

MR 019 Oxygen - Boiler 3A

MR 020 SO2 - Boiler 3A

MR 021 Opacity - Boilers 1A & 2A common stack

MR 022 Opacity - Boiler 3A


Additional monitoring requirements are located at the individual MR levels, EU001-003, EU 007, and in Table B.

hdr

Installation Notification: due 60 days before CEMS/COMS installation. Thenotification shall include plans and drawings of the system.

Minn. R. 7017.1040, subp. 1

CEMS/COMS Certification/Recertification Test: due 120 days after the firstcalendar quarter following CEMS/COMS Installation. (This requirement is asstringent as that of Minn. R. 7017.1050, subp. 1 requiring testing within 90 daysafter the due date of the first excess emissions report required for the CEMS orCOMS.)

Minn. R. 7017.1050, subp. 1

CEMS/COMS Certification Test Plan: due 30 days before CEMS/COMSCertification TestCEMS/COMS Certification Test Pretest Meeting: due 7 days before CEMS/COMSCertification TestCEMS/COMS Certification Test Report: due 45 days after CEMS/COMSCertification TestCEMS/COMS Certification Test Report - Microfiche Copy: due 105 days afterCEMS/COMS Certification Test

The Notification, Test Plan, and Test Report may be submitted in alternate formatas allowed by Minn. R. 7017.1120, subp. 2

Minn. R. 7017.1060, subps. 1-3; Minn. R. 7017.1080,subps. 1-4

CONTINUOUS EMISSION MONITOR REQUIREMENTS hdr

Continuous Operation: CEMS must be operated and data recorded during allperiods of emission unit operation including periods of emission unit start-up,shutdown, or malfunction except for periods of acceptable monitor downtime. Thisrequirement applies whether or not a numerical emission limit applies during theseperiods. A CEMS must not be bypassed except in emergencies where failure tobypass would endanger human health, safety, or plant equipment. No data recordis required for the diluent monitors.

Acceptable monitor downtime includes reasonable periods as listed in Minn. R.7017.1090, subp. 2, items (A) - (D).

Minn. R. 7017.1090, subp. 1

Monitoring Data: All data points collected by a CEMS shall be used to calculateindividual hourly emission averages unless another applicable requirement requiresmore frequent averaging. In order for an hour of data to be considered, it mustcontain the following minimum number of data points:

A. four data points, equally spaced, if the emission unit operated during the entirehour;

B. two data points, at least 15 minutes apart, during periods of monitor calibrationor routine maintenance;

C. one data point if the emission unit operated for 15 minutes or less during thehour.

Minn. R. 7017.1160, subp. 1 and 2

QA Plan: Develop and implement a written quality assurance plan that covers eachCEMS. The plan shall be on site and available for inspection within 30 days aftermonitor certification. The plan shall contain all of the information required by 40CFR pt. 60, Appendix F, Section 3. The plan shall include the manufacturer's spareparts list for each CEMS and require that those parts be kept at the facility unlessthe Commissioner gives written approval to exclude specific spare parts from thelist.

Minn. R. 7017.1170, subp. 2


13700027 - 009

Facility Name:

Permit Number:

03/19/15A-12

CEMS Daily Calibration Drift (CD) Test: The CD shall be quantified and recorded atzero (low-level) and upscale (high-level) gas concentrations at least once dailyaccording to the procedures listed in Minn. R. 7017.1170, subp. 3(A) and (B) and40 CFR Section 60.13(d)(1) for each pollutant concentration, each diluent monitor,and for each monitor range. The CEMS shall be adjusted whenever the CDexceeds twice the specification of 40 CFR pt. 60, Appendix B. If no span value isspecified in the applicable requirement or in a compliance document, the Permitteeshall use a span value equivalent to 1.5 times the emission limit. 40 CFR pt. 60,Appendix F, shall be used to determine out-of-control periods for CEMS. Follow theprocedures in 40 CFR pt. 60, Appendix F.

Minn. R. 7017.1170, subp. 3

Cylinder Gas Audit: due before end of each calendar half-year following CEMCertification Test, except that a CGA is not required during any calendar half yearin which a RATA was performed. The initial CGA must be performed within 180days following certification of the CEMS. The CGAs shall be conducted at leastthree months apart but no more than eight months apart. A CGA shall beconducted according to the procedures in 40 CFR pt. 60, Appendix F, Section5.1.2. If the monitored emission unit was operated for less than 24 hours during thecalendar half year, a CGA is not required for that calendar half year.

Minn. R. 7017.1170, subp. 4

CEMs Relative Accuracy Test Audit (RATA): due before end of each calendar yearfollowing CEM Certification Test. A RATA is not required in any calendar year if aRATA conducted in the previous year demonstrated a relative accuracy value ofless than 15 percent or if the associated emissions unit operated less than 48hours during the calendar year. If the exception is used, the next RATA shall beconducted during the first half of the following calendar year. RATAs shall beconducted at least 3 months apart and according to 40 CFR pt. 60, Appendix F,Section 5.1.1.

Minn. R. 7017.1170, subp. 5

Relative Accuracy Test Audit (RATA) Notification: due 30 days before CEMSRelative Accuracy Test Audit (RATA).

Minn. R. 7017.1180, subp. 2

Recordkeeping: The owner or operator must retain records of all CEMS monitoringdata and support information for a period of five years from the date of themonitoring sample, measurement or report. Records shall be kept at the source.

Minn. R. 7017.1130

CONTINUOUS OPACITY MONITOR REQUIREMENTS hdr

Monitoring Data: All COMS data must be reduced to six-minute averages. A sixminute average is valid only if it contains data from at least five minutes within theaveraging period. COMS data shall be reduced and calculated as outlined in Minn.R. 7017.1200, subp. 3.

Minn. R. 7017.1200, subps. 1-3

Continuous Operation: COMS must be operated and data recorded during allperiods of emission unit operation including periods of emission unit start-up,shutdown, or malfunction except for periods of acceptable monitor downtime. Thisrequirement applies whether or not a numerical emission limit applies during theseperiods. A COMS must not be bypassed except in emergencies where failure tobypass would endanger human health, safety, or plant equipment.

Acceptable monitor downtime includes reasonable periods as listed in Items A, B,C and D of Minn. R. 7017.1090, subp. 2.

Minn. R. 7017.1090, subp. 1

QA Plan: Implement a written quality assurance plan which covers each COMS.The plan shall be on site and available for inspection within 30 days after monitorcertification. The plan shall contain all of the information required by Minn. R.7017.1210, subp. 1. The plan shall include the manufacturer's spare parts list foreach COMS and require that those parts be kept at the facility unless theCommissioner gives written approval to exclude specific spare parts from the list.

Minn. R. 7017.1210, subp. 1

COMS Daily Calibration Drift Test: The owner or operator of a COMS shall conducta daily zero and upscale calibration drift assessment and adjustments according tothe requirements of 40 CFR pt. 60.13(d)(2). The zero and upscale calibration levelsmust be determined by using the span value specified in the applicablerequirement. If the applicable requirement does not specify a span value, a spanvalue of 60, 70, or 80 percent opacity must be used unless an alternative spanvalue is approved by the commissioner.

Minn. R. 7017.1210, subp. 2

COMS Calibration Error Audit: due before end of each calendar half-year starting06/05/2007. Audits are to be at least three months apart but no more than eightmonths apart except that a calibration error audit need not be conducted during anysemiannual period in which the emission unit operated less than 24 hours. Thecalibration error audit shall be conducted according to the procedures in 40 CFR pt.60, Appendix B, PS. 1.

Minn. R. 7017.1210, subp. 3


13700027 - 009

Facility Name:

Permit Number:

03/19/15A-13

COMS Attenuator Calibration: The Permittee shall have an independent testingcompany conduct calibrations of each of the neutral density filters used in thecalibration error audit according to the procedure in Code of Federal Regulations,Title 40, Part 60, Appendix B, Section 7.1.3.1 within the time frame of opacitystability guaranteed by the attenuator manufacturer. The manufacturer's guaranteeof stability shall be on site available for inspection.

Minn. R. 7017.1210, subp. 4

COMS Calibration Error Audit Notification: due 30 days before the COMSCalibration Error Audit.

Minn. R. 7017.1180, subp. 2

Recordkeeping: The owner or operator must retain records of all COMS monitoringdata and support information for a period of five years from the date of themonitoring sample, measurement or report. Records shall be kept at the source.

Minn. R. 7017.1130


13700027 - 009

Facility Name:

Permit Number:

03/19/15A-14

Subject Item: EU 001 Boiler No. 1A (17.8 MW) - Boiler

Associated Items: CE 001 Electrostatic Precipitator - High Efficiency

GP 001 Boilers 1A, 2A, and 3A




SV 019 Boilers 1A and 2A


EMISSION LIMITS hdr

Total Particulate Matter: less than or equal to 0.60 lbs/million Btu heat input Minn. R. 7011.0510, subp. 1

PM < 10 micron: less than or equal to 0.074 lbs/million Btu heat input , inclusive ofsoot blowing, on a 24 hour average basis.


Opacity: less than or equal to 20 percent except for one six-minute period per hourof not more than 60 percent opacity. An exceedance of this opacity standardoccurs whenever any one-hour period contains two or more six-minute periodsduring which the average opacity exceeds 20 percent or whenever any one-hourperiod contains one or more six-minute periods during which the average opacityexceeds 60 percent.

Minn. R. 7011.0510, subp. 2

Sulfur Dioxide: less than or equal to 194.40 lbs/hour using 1-Hour Average Minn. Stat. Section 116.07, subds. 4a & 9; Minn. R.7007.0100, subp. 7(A), 7(L), & 7(M); Minn. R.7007.0800, subp. 1; Minn. R. 7007.0800, subp. 2;Minn. R. 7007.0800, subp. 4; Minn. R.7009.0010-7009.0080

Sulfur Dioxide: less than or equal to 2.0 lbs/million Btu heat input when burning oil. Minn. R. 7011.0510, subp. 1

Sulfur Dioxide: less than or equal to 4.0 lbs/million Btu heat input when combustingcoal.

Minn. R. 7011.0510, subp. 1

OPERATIONAL REQUIREMENTS[See Subject Item GP 001 for additional applicable emission fuel usage limits.]

hdr

STET (Short Term Emergency and Testing) Operating hours limit:

The boiler may operate up to 40 hours per year to demonstrate the Uniform Ratingof Generating Equipment (URGE) capacity and to meet emergency energy supplyneeds. Maintain documentation of all STET operation to demonstrate compliancewith this limit. The boiler must meet emission limits during STET operation.

Minn. R. 7007.0800, subp. 2

Fuels Allowed: bituminous coal, subbituminous coal, used oil, natural gas and oilycellulose-based sorbents (including rags).

Minn. R. 7007.0800, subp. 2

Fuel Usage: less than or equal to 77.0 gallons/hour (used oil), and less than orequal to 5% of the total heat input of the boiler from used oil.

Minn. R. 7007.0800, subp. 2

Steam Flow: less than or equal to 114,318 lbs/hour using 8-hour Block Average ,unless a new limit is set pursuant to Minn. R. 7017.2025, subp. 3 based on thevalues recorded during the most recent MPCA- approved performance test wherecompliance was demonstrated. The new limit shall be implemented upon receipt ofthe Notice of Compliance letter granting preliminary approval. The limit is final uponissuance of a permit amendment incorporating the change.

Readings shall be taken every 15 minutes of operation and used to calculate the8-Hour Block Average. The readings may be taken from the SO2 CEMS data, ormay be independently taken.

Minn. R. 7017.2025, subp. 3; Minn. R. 7017.2025,subp. 3a

Limit soot blowing to a total of 120 minutes per calendar day. Title I Condition: 40 CFR Section 52.21(k); Minn. R.7007.3000


13700027 - 009

Facility Name:

Permit Number:

03/19/15A-15

Comply with Subpart DDDDD - National Emission Standards for Hazardous AirPollutants: Industrial, Commercial, and Institutional Boilers and Process Heaters:

a. Submit an Initial Notification not later than May 31, 2013 or within 120 calendardays after a boiler or process heater becomes subject to Subpart DDDDD,whichever is later.

b. For an existing affected source, comply with applicable requirements no laterthan, January 31, 2016;

c. For a new affected source with an initial startup date on or before January 31,2013, comply with applicable requirements by January 31, 2013;

d. For a new affected source with an initial startup date after January 31, 2013,comply with requirements upon initial startup.

Also comply with applicable requirements of 40 CFR 63, General Provisions.

40 CFR 63.7480 to 63.7585; Tables to SubpartDDDDD of 40 CFR 63; 40 CFR pt. 63, subp. A; Minn.R. 7011.7000

CONTROL REQUIREMENTS hdr

The Permittee shall operate and maintain the electrostatic precipitator (CE 001) anytime that EU 001 is in operation, within the manufacturer's printed guidelines,except when burning only natural gas. The Permittee shall document periods ofnon-operation of the control equipment.

See Subject Item CE 001 for specific electrostatic precipitator operatingrequirements.

Title I Condition: 40 CFR Section 52.21; Minn. R.7007.3000

CONTINUOUS MONITORING REQUIREMENTS hdr

Emission Monitoring: The Permittee shall use a COMS on SV 019 to measureopacity emissions from EU 001.

See Subject Item GP 006 and Table B for specific COMS requirements.

Minn. R. 7017.1006

Emissions Monitoring: The Permittee shall use a SO2 CEMS on SV 019 tomeasure SO2 emissions from EU 001.

See Subject Item GP 006 and Table B for specific CEMS requirements.

Minn. R. 7017.1006

RECORDKEEPING hr

Fuel Usage Recordkeeping: Each day that used oil is combusted in the boiler, thePermittee shall record the quantity of used oil combusted on an hourly basis, duringthe hours of used oil combustion.

Minn. R. 7007.0800, subp. 5

Soot Blowing: Record the date, time, and duration of each soot blowing event. Minn. R. 7007.0800, subp. 5

Each day, calculate and record the three (3) 8-hour block average steam flows forthe previous day.

A day may be defined as a calendar day, or as another 24 hour period of thePermittee's choice. However it is defined, it must be consistently used in that wayfor the boiler.

Minn. R. 7007.0800, subp. 2


Performance Test: due before end of each 24 months starting 11/13/2013 tomeasure PM emissions while burning coal. The performance test shall beconducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8,using EPA Reference Method 5 and 202, or other method approved by MPCA inthe performance test plan approval.

Testing conducted during the 60 days prior to the performance test due datesatisfies the performance test due date, and will not reset the test due date forfuture testing as required: 1) by this permit; 2) by the most recently approvedPerformance Test Frequency Plan; or 3) within a Notice of Compliance letter.Testing conducted more than two months prior to the performance test due datesatisfies this test due date requirement and will reset the performance test duedate.

Minn. R. 7017.2020, subp. 1


13700027 - 009

Facility Name:

Permit Number:

03/19/15A-16

Performance Test: due before end of each 24 months starting 11/13/2013 tomeasure PM10 emissions while burning coal. The performance test shall beconducted at worst case conditions as defined at Minn. R. 7017.2005, subp. 8,using EPA Reference Method 5 and 202; 201A and 202; or other method approvedby MPCA in the performance test plan approval.

Testing conducted during the 60 days prior to the performance test due datesatisfies the performance test due date, and will not reset the test due date forfuture testing as required: 1) by this permit; 2) by the most recently approvedPerformance Test Frequency Plan; or 3) within a Notice of Compliance letter.Testing conducted more than two months prior to the performance test due datesatisfies this test due date requirement and will reset the performance test due date.

(continued below)


(continued from above)

Performance testing for PM10 emissions while burning coal shall be conductedduring soot-blowing conditions as well as non-soot-blowing conditions. Emissionsfrom two runs of non-soot-blowing emissions and from one run during which anormal duration soot-blowing occurs shall be collected. Compliance shall bedetermined by taking the average of the two non-soot-blowing tests x 22 hours perday, plus the result of the soot-blowing-test x 2 hours per day, then summed andaveraged over a 24-hour period.



13700027 - 009

Facility Name:

Permit Number:

03/19/15A-17







SV 019 Boilers 1A and 2A


EMISSION LIMITS hdr





Minn. R. 7011.0510, subp. 2




Minn. R. 7011.0510, subp. 1


hdr



Minn. R. 7007.0800, subp. 2


Minn. R. 7007.0800, subp. 2


Minn. R. 7007.0800, subp. 2






13700027 - 009

Facility Name:

Permit Number:

03/19/15A-18















Minn. R. 7017.1006



Minn. R. 7017.1006

RECORDKEEPING hr


Minn. R. 7007.0800, subp. 5




Minn. R. 7007.0800, subp. 2




Minn. R. 7017.2020, subp. 1


13700027 - 009

Facility Name:

Permit Number:

03/19/15A-19



(continued below)






13700027 - 009

Facility Name:

Permit Number:

03/19/15A-20




MR 019 Oxygen - Boiler 3A

MR 020 SO2 - Boiler 3A

MR 022 Opacity - Boiler 3A

SV 003 Boiler 3A


EMISSION LIMITS hdr





Minn. R. 7011.0510, subp. 2




Minn. R. 7011.0510, subp. 1


hdr



Minn. R. 7007.0800, subp. 2


Minn. R. 7007.0800, subp. 2


Minn. R. 7007.0800, subp. 2






13700027 - 009

Facility Name:

Permit Number:

03/19/15A-21















Minn. R. 7017.1006



Minn. R. 7017.1006

RECORDKEEPING hr


Minn. R. 7007.0800, subp. 5




Minn. R. 7007.0800, subp. 2




Minn. R. 7017.2020, subp. 1


13700027 - 009

Facility Name:

Permit Number:

03/19/15A-22



(continued below)






13700027 - 009

Facility Name:

Permit Number:

03/19/15A-23

Subject Item: EU 004 Coal Ash Silo - Silo/Bin

Associated Items: CE 004 Fabric Filter - Low Temperature, i.e., T<180 Degrees F

SV 004 Coal Ash Silo


EMISSION LIMITS hdr

Total Particulate Matter: less than or equal to 0.30 grains/dry standard cubic footunless required to further reduce emissions to the less stringent limit of either Minn.R. 7011.0730 or Minn. R. 7011.0735.

Minn. R. 7011.0715, subp. 1(A)

PM < 10 micron: less than or equal to 0.0020 grains/dry standard cubic foot at thestack (SV 004).


Opacity: less than or equal to 0 percent opacity at the stack (SV004). This limit ismore stringent than the limit prescribed by Minn. R. 7011.0715 which also applies.

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

Opacity: less than or equal to 20 percent Minn. R. 7011.0715, subp. 1(B)


The Permittee shall operate and maintain the fabric filter (CE 004) at all times thatany emission unit controlled by the fabric filter is in operation. The Permittee shalldocument periods of non-operation of the control equipment when the emission unitis in operation.

See Subject Item CE 004 for specific fabric filter operating requirements.



Performance Test: due before end of each year starting 04/04/2014 to measurePM10 emissions. The performance test shall be conducted at worst caseconditions as defined at Minn. R. 7017.2005, subp. 8, using EPA ReferenceMethod 5 and 202; 201A and 202; or other method approved by MPCA in theperformance test plan approval.


Minn. R. 7017.2020, subp. 1

Performance Test: due before end of each year starting 04/04/2014 to measureopacity of emissions. The performance test shall be conducted at worst caseconditions as defined at Minn. R. 7017.2005, subp. 8, using EPA ReferenceMethod 9, or other method approved by MPCA in the performance test planapproval.


Minn. R. 7017.2020, subp. 1


13700027 - 009

Facility Name:

Permit Number:

03/19/15A-24

Subject Item: EU 005 High School Boiler 1 - Boiler

Associated Items: SV 005 High School Boiler 1



Opacity: less than or equal to 20 percent opacity except for one 6-minute period perhour of not more than 60 percent opacity.

Minn. R. 7011.0510, subp. 2

Fuel use limited to natural gas. Minn. R. 7007.0800, subp. 2









13700027 - 009

Facility Name:

Permit Number:

03/19/15A-25

Subject Item: EU 006 High School Boiler 2 - Boiler

Associated Items: SV 006 High School Boiler 2



Opacity: less than or equal to 20 percent opacity except for one 6-minute period perhour of not more than 60 percent opacity.

Minn. R. 7011.0510, subp. 2

Fuel use limited to natural gas. Minn. R. 7007.0800, subp. 2









13700027 - 009

Facility Name:

Permit Number:

03/19/15A-26

Subject Item: EU 007 Wood Fired Boiler with gas burner (19.4 MW) - Boiler

Associated Items: CE 005 Multiple Cyclone w/o Fly Ash Reinjection - Most Multiclones

CE 006 Electrostatic Precipitator - High Efficiency

CE 007 Selective Noncatalytic Reduction for NOX

MR 010 Wood Boiler Opacity Monitor

MR 011 Wood Boiler NOx Monitor

MR 012 Wood Boiler CO Monitor

MR 013 Wood Boiler Oxygen Monitor

SV 007 Wood Fired Boiler


EMISSION LIMITS hdr

Total Particulate Matter: less than or equal to 0.025 lbs/million Btu heat input Title I Condition: 40 CFR Section 52.21(j); Minn. R.7007.3000

Total Particulate Matter: less than or equal to 0.030 lbs/million Btu heat input using3-hour Average . This limit applies at all times except during times of startup,shutdown or malfunction.

40 CFR Section 60.43b(h)(1); Minn. R. 7011.0565

PM < 10 micron: less than or equal to 0.025 lbs/million Btu heat input Title I Condition: 40 CFR Section 52.21(j); Minn. R.7007.3000

Opacity: less than or equal to 20 percent based on a 6-minute average, except forone 6-minute period per hour of not more than 27 percent opacity.

This limit applies at all times, except during periods of startup, shutdown ormalfunction.

40 CFR Section 60.43b(f); Minn. R. 7011.0565

Carbon Monoxide: less than or equal to 0.58 lbs/million Btu heat input using 8-hourBlock Average .

"8-hour block average" means the average of all hourly emission rates when theemissions unit is operating over three discrete eight-hour periods beginning atmidnight.


Nitrogen Oxides: less than or equal to 69.0 lbs/hour using 1-Hour Average Minn. Stat. Section 116.07, subds. 4a & 9; Minn. R.7007.0100, subp. 7(A), 7(L), & 7(M); Minn. R.7007.0800, subp. 1; Minn. R. 7007.0800, subp. 2;Minn. R. 7007.0800, subp. 4; Minn. R.7009.0010-7009.0080

Nitrogen Oxides: less than or equal to 0.15 lbs/million Btu heat input using 30-dayRolling Average .This limit is more stringent than the limit prescribed by 40 CFRSection 60.44b(l)(1) which also applies.


Nitrogen Oxides: less than or equal to 0.20 lbs/million Btu heat input using 30-dayRolling Average . This limit applies at all times including during periods of startup,shutdown or malfunction.

40 CFR Section 60.44b(l)(1); Minn. R. 7011.0565

OPERATING LIMITS hdr

Operating Hours: less than or equal to 7,560 hours/year using 12-month RollingSum when combusting wood only or wood in combination with any other fuels.

This is a state-only requirement and is not enforceable by the U.S. EnvironmentalProtection Agency (EPA) Administrator and citizens under the Clean Air Act.

Minn. R. 4410.4300, subp. 15(A); Minn. R. 7007.0800,subp. 2



Minn. R. 7007.0800, subp. 2


13700027 - 009

Facility Name:

Permit Number:

03/19/15A-27

Fuel use limited to natural gas and untreated wood, such as, but not limited to,logging waste, trees, brush, etc.

Untreated wood is defined as any wood that has not been subject to any chemicaltreatment or coating. Examples are:

1) untreated residuals from manufacturing processes such as furniture, cabinet,and pallet making and other wood product manufacture;2) lumber and other natural unprocessed wood construction waste;3) urban and park tree trimming and forest residuals;4) wood from trees downed by storms;5) trees removed for urban development;6) trees grown specifically to be used as fuel; and7) trees removed as part of a timber management plan.

Minn. R. 7007.0800, subp. 2

Ammonia Slip: Limited to less than or equal to 18.5 ppm. If the ammonia slipexceeds this level, the SNCR system shall be adjusted to reduce the ammonia slipto less than 18.5 ppm, or shut down until repairs are made and normal operatingconditions are achieved.

Compliance shall be determined by monitoring the reagent feed rate. Themaximum feed rate shall be determined by the performance testing required below.

Minn. R. 7007.0800, subp. 2

At all times, including periods of startup, shutdown, and malfunction, owners andoperators shall, to the extent practical, maintain and operate EU 007 (the affectedfacility), including the associated air pollution control equipment, in a mannerconsistent with good air pollution control practices for minimizing emissions.

40 CFR Section 60.11(d)






Also comply with applicable requirements of 40 CFR pt. 63, General Provisions.



The Permittee shall operate and maintain the control equipment (CE 005 and CE007) at any time that EU 007 is in operation. The Permittee shall document periodsof non-operation of the control equipment.

See Subject Item CE 005 for specific multiple cyclone operating requirements.

See Subject Item CE 007 for specific selective noncatalytic reduction systemoperating requirements.


The Permittee shall operate and maintain the electrostatic precipitator (CE 006) anytime that EU 007 is in operation, within the manufacturer's printed guidelines. ThePermittee shall document periods of non-operation of the control equipment.




Operate and maintain a continuous monitor to measure stack carbon monoxideemissions.

See Subject Item GP 006, and Table B for specific CEMS requirements.


Operate and maintain a continuous monitor to measure the opacity of stackemissions.

See Subject Item: GP 005 and Table B for specific COMS requirements.

40 CFR Section 60.48b(a); Minn. R. 7011.0565; Minn.R. 7017.0200


13700027 - 009

Facility Name:

Permit Number:

03/19/15A-28

Operate and maintain a continuous monitor to measure stack nitrogen oxidesemissions. Operation and maintenance shall be in accordance with 40 CFRSection 60.13 and 40 CFR 60, Appendix B.


Title I Condition: 40 CFR Section 52.21(j); Minn. R.7007.3000; 40 CFR Section 64.3(d)(2)

The Permittee shall install, calibrate, maintain, and operate CEMS for measuringNOx and O2 (or CO2) emissions discharged to the atmosphere, and shall recordthe output of the system.

40 CFR Section 60.48b(b)(1); Minn. R. 7011.0565

The CEMS shall be operated and data recorded during all periods of operation ofEU 007 except for CEMS breakdowns and repairs. Data is recorded duringcalibration checks, and zero and span adjustments.

40 CFR Section 60.48b(c); Minn. R. 7011.0565

The 1-hour average NOx emission rates measured by the NOx CEMS shall beexpressed in lb/MMBtu heat input and shall be used to calculate the 30-dayaverage emission rate. The 1-hour averages shall be calculated using data pointsrequired under 40 CFR Section 60.13(h)(2).

40 CFR Section 60.48b(d); Minn. R. 7011.0565

When NOx emissions data are not obtained because of CEMS breakdowns,repairs, calibration checks, and zero and span adjustments, emission data will beobtained by using standby monitoring systems, Method 7 or 7A of Appendix A of 40CFR pt. 60, or other approved reference methods to provide emission data for aminimum of 75 percent of the operating hours of EU 007, in at least 22 out of 30successive EU 007 operating days.

40 CFR Section 60.48b(f); Minn. R. 7011.0565

Following the date the initial performance test is completed or required to becompleted (whichever comes first), the Permittee shall upon request determinecompliance with the NOX standards in 40 CFR Section 60.44b through the use of a30-day performance test. During periods when performance tests are notrequested, NOX emissions data collected are used to calculate a 30-day rollingaverage emission rate on a daily basis and used to prepare excess emissionreports, but will not be used to determine compliance with the NOX emissionstandards. A new 30-day rolling average emission rate is calculated each operatingday as the average of all of the hourly NOX emission data for the previous 30operating days.

40 CFR Section 60.46b(e)(4); Minn. R. 7011.0565

RECORDKEEPING hdr

The Permittee shall record and maintain records of the amount of fuel combustedeach day and calculate the annual capacity factor individually for natural gas andwood for the reporting period. The annual capacity factor is determined on a12-month rolling average basis with a new annual capacity factor calculated at theend of each calendar month.

40 CFR Section 60.49b(d)(1); Minn. R. 7011.0565

Maintain records each operating day of the information listed under 40 CFR Section60.49b(g).

40 CFR Section 60.49b(g); Minn. R. 7011.0565

Keep all records readily available and on site for a period of 5 years.

Maintain relevant records of each startup, shutdown, or malfunction of operationequipment and the occurrence and duration of each malfunction of the required airpollution control and monitoring equipment.

40 CFR Section 60.7(b)

Maintain a file of all measurements, including continuous monitoring system,monitoring device, and performance testing measurements; all continuousmonitoring system performance evaluations; all continuous monitoring system ormonitoring device calibration checks; adjustments and maintenance performed onthese systems or devices; and all other information required by this part recorded ina permanent form suitable for inspection.

40 CFR Section 60.7(f)

Recordkeeping - Hours of Operation: The Permittee shall maintain documentationof hours of operation for EU 007.

Minn. R. 7007.0800, subps. 4-5

Recordkeeping - Fuel Usage: The Permittee shall keep records of fuel type andusage on a monthly basis.

Minn. R. 7007.0800, subp. 5

Monthly Recordkeeping - Operating Hours. By the 15th day of each month, thePermittee shall calculate and record the following:

1) The total operating hours for EU 007 for the previous calendar month.2) The total operating hours for EU 007 for the previous 12 calendar month period.This shall be calculated by summing the monthly operating hours data for theprevious 12 calendar months.

3) The total operating hours for EU 007 when combusting only wood or wood incombination with any other fuels for the previous calendar month.4) The total operating hours for EU 007 when combusting only wood or wood incombination with any other fuels for the previous 12 calendar month period. Thisshall be calculated by summing the monthly operating hours data for the previous12 calendar months.

Minn. R. 7007.0800, subps. 4-5


13700027 - 009

Facility Name:

Permit Number:

03/19/15A-29


Performance tests and procedures under 40 CFR Sections 60.46b(d) and60.46b(e) must be followed.

40 CFR Section 60.46b(d); 40 CFR Section 60.46b(e);Minn. R. 7011.0565

Initial Performance Test: due 60 days after achieving maximum capacity(production rate), not to exceed 180 days after initial startup of the natural gasburner, to measure NOx emissions. The performance test shall be conducted atworst case conditions as defined at Minn. R. 7017.2005, subp. 8, using EPAReference Method 7E, or other method approved by MPCA in the performance testplan approval.

Use data collected from CEMS for 30 successive operating days. The 30-dayaverage emission rate is calculated as the average of all hourly emission datarecorded by the monitoring system during the 30-day test period.

40 CFR Section 60.8(a); 40 CFR Section 60.46b(e);Minn. R. 7017.2020, subp. 1

Performance Test: due before end of each year starting 10/06/2014 to measure PMemissions. The performance test shall be conducted at worst case conditions asdefined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 5 and 202,or other method approved by MPCA in the performance test plan approval.


Title I Condition: 40 CFR Section 52.21(j); Minn. R.7007.3000; 40 CFR Section 60.43b(c)(1); Minn. R.7011.0565

Performance Test: due before end of each year starting 10/06/2014 to measurePM10 emissions. The performance test shall be conducted at worst caseconditions as defined at Minn. R. 7017.2005, subp. 8, using EPA ReferenceMethod 5 and 202; 201A and 202; or other method approved by MPCA in theperformance test plan approval.



Performance Test: due before end of each year starting 10/06/2014 to measureAmmonia Slip. Testing shall be done simultaneously with PM10 performancetesting. The performance test shall be conducted at worst case conditions asdefined at Minn. R. 7017.2005, subp. 8, using EPA Reference Method 206(CTM-027), or other method approved by MPCA in the performance test planapproval.


Minn. R. 7007.0800, subp. 2; Minn. R. 7017.2020,subp. 1


13700027 - 009

Facility Name:

Permit Number:

03/19/15A-30

Subject Item: EU 008 Enclosed wood unloading - Loading-Unloading Equipment


SV 008 Enclosed Wood Unloading Area


EMISSION LIMITS hdr


Minn. R. 7011.0715, subp. 1(A)



Opacity: less than or equal to 0 percent opacity at the stack (SV 008). This limit ismore stringent than the limit prescribed by Minn. R. 7011.0715 which also applies.


Opacity: less than or equal to 20 percent Minn. R. 7011.0715






Performance Test: due before end of each calendar 60 months starting 05/31/2012to measure PM10 emissions. The performance test shall be conducted at worstcase conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA ReferenceMethod 5 and 202; 201A and 202; or other method approved by MPCA in theperformance test plan approval.


Minn. R. 7017.2020, subp. 1

Performance Test: due before end of each calendar 60 months starting 05/31/2012to measure opacity of emissions. The performance test shall be conducted at worstcase conditions as defined at Minn. R. 7017.2005, subp. 8, using EPA ReferenceMethod 9, or other method approved by MPCA in the performance test planapproval.


Minn. R. 7017.2020, subp. 1


13700027 - 009

Facility Name:

Permit Number:

03/19/15A-31

Subject Item: EU 010 Wood Conveyor System - Conveyor


SV 011 Wood Conveyor


EMISSION LIMITS hdr


Minn. R. 7011.0715, subp. 1(A)













Minn. R. 7017.2020, subp. 1



Minn. R. 7017.2020, subp. 1


13700027 - 009

Facility Name:

Permit Number:

03/19/15A-32

Subject Item: EU 011 Wood Transfer/Metering Bin - Silo/Bin


SV 012 Wood Transfer/Metering Bin


EMISSION LIMITS hdr


Minn. R. 7011.0715, subp. 1(A)













Minn. R. 7017.2020, subp. 1



Minn. R. 7017.2020, subp. 1


13700027 - 009

Facility Name:

Permit Number:

03/19/15A-33

Subject Item: CE 001 Electrostatic Precipitator - High Efficiency



Operation and Maintenance of ESP: The Permittee shall operate and maintain theESP in accordance with the O & M Plan. The Permittee shall keep copies of the O& M Plan available onsite for use by staff and review by MPCA staff.

40 CFR Section 64.7(b); Minn. R. 7017.0200

The Permittee shall operate and maintain the electrostatic precipitator such that itachieves an overall control efficiency for Total Particulate Matter: greater than orequal to 95.0 percent control efficiency


The Permittee shall operate and maintain the electrostatic precipitator such that itachieves an overall control efficiency for PM < 10 micron: greater than or equal to95.0 percent control efficiency


The Permittee shall record the total power input to the electrostatic precipitatoronce each day of operation of EU 001. If the total power input is below theminimum described below, take corrective action (as outlined in the O&M Plan forthe facility) within 24 hours of discovery to return to the minimum power input. Thisis considered an excursion as defined in 40 CFR Section 64.1. Make a record of allcorrective actions taken.

Title I Condition: 40 CFR Section 52.21(k); Minn. R.7007.3000; Minn. R. 7007.0800, subp. 5.

Total Power Input: greater than or equal to 27.7 kilowatts using 3-hour BlockAverage , unless a new minimum total power input is required to be set pursuant toMinn. R. 7017.2025, subp. 3. If a new minimum power input is required to be set, itwill be based on the average power input recorded during the most recent MPCAapproved performance test where compliance for Total Particulate Matter and/orParticulate Matter less than 10 microns emissions was demonstrated. If thethree-hour rolling average total secondary power input drops below the minimumlimit, this shall be reported as a deviation.

Title I Condition: 40 CFR Section 52.21(k); Minn. R.7007.3000; Minn. R. 7017.2025, subp. 3; Minn. R.7007.0800, subp. 5.

Opacity: less than or equal to 28.0 percent opacity using 3-hour Average . Opacityin excess of this limit shall be considered an excursion under 40 CFR Section64.6(c)(2), for purposes of the PM limit for EU 001. This applies for all types andqualities of fuel burned in EU 001.

40 CFR Section 64.3; Minn. R. 7017.0200

Opacity: less than or equal to 11.0 percent opacity using 3-hour Average . Opacityin excess of this limit shall be considered an excursion under 40 CFR Section64.6(c)(2), for purposes of the PM10 limit for EU 001. This applies for all types andqualities of fuel burned in EU 001.


Continuous Monitoring: The Permittee shall continuously, or at a minimum onceevery 15 minutes, monitor the opacity of the ESP exhaust. [See Subject Item GP006 for specific COMS operating requirements.]

40 CFR Section 64.4(b)(4)(ii); Minn. R. 7017.0200

Monitoring Equipment: The necessary monitoring equipment must be installed, inuse, and properly maintained, including maintaining the necessary parts for routinerepairs of the monitoring equipment, whenever operation of the monitored controlequipment is required.


Periodic Inspections: At least once per calendar quarter, the Permittee shall inspectthe control equipment components that are subject to wear or plugging, forexample: bearings, belts, hoses, fans, nozzles, orifices, and ducts. The Permitteeshall maintain a written record of the inspection and any corrective actions takenresulting from the inspection. If it is not possible to perform this inspection becausethe boiler experienced no downtime during the calendar quarter, this should benoted in the written inspection record.


Annual Inspections: At least once per calendar year, or more frequently if requiredby the manufacturer, the Permittee shall inspect the control equipment componentsnot covered by the quarterly inspections. This includes, but is not limited to,components that are not subject to wear or plugging including structuralcomponents, housings, and hoods. The Permittee shall maintain a written record ofeach inspection and any corrective actions taken resulting from the inspection.


Annual Calibration: The Permittee shall calibrate the total power input monitor atleast annually and shall maintain a written record of the calibration and any actionresulting from the calibration.



13700027 - 009

Facility Name:

Permit Number:

03/19/15A-34

Corrective Actions: The Permittee shall take corrective action as soon as possible ifany of the following occur:

- the monitored opacity, averaged over any 3-hour period, exceeds 11%; or- the total power input is below the required operating level; or- the ESP or any of its components are found during the inspections to need repair.

Corrective actions shall return operation to within the permitted range/level and/orinclude completion of necessary repairs identified during the inspection, asapplicable. Corrective actions include, but are not limited to, those outlined in theO & M Plan for the ESP. The Permittee shall keep a record of the type and date ofany corrective action taken for the ESP.

40 CFR Section 64.7(d); Minn. R. 7017.0200

Documentation of Need for Improved Monitoring: If the Permittee fails to achievecompliance with an emission limitation or standard for which the monitoring did notprovide an indication of an excursion or exceedance while providing valid data, orthe results of compliance or performance testing document a need to modify theexisting opacity which is considered and excursion, the Permittee shall promptlynotify the MPCA and, if necessary, submit a permit amendment application toaddress the necessary monitoring changes.


As required by 40 CFR Section 64.9(a)(2), for the Semi-Annual Deviations Reportlisted in Table B of this permit, and/or the Notification of Deviations EndangeringHuman Health and the Environment listed earlier in Table A of this permit, asapplicable, the Permittee shall include the following related to the monitoringidentified as required by 40 CFR pt. 64:

1) Summary information on the number, duration, and cause of excursions orexceedances, as applicable, and the corrective action taken; and

2) Summary information on the number, duration, and cause for monitor downtimeincidents.

40 CFR Section 64.7(a)(2); Minn. R. 7017.0200

The Permittee shall maintain records of monitoring data, monitor performance,corrective actions taken, and other supporting information required to bemaintained. The Permittee may maintain records on alternative media, such asmicrofilm, computer files, magnetic tape disks, or microfiche, provided that the useof such alternative media allows for expeditious inspection and review, and doesnot conflict with other applicable recordkeeping requirements.



13700027 - 009

Facility Name:

Permit Number:

03/19/15A-35










The Permittee shall record the total power input to CE 002 once each day ofoperation of EU 002. If the total power input is below the minimum described below,take corrective action (as outlined in the O&M Plan for the facility) within 24 hoursof discovery to return to the minimum power input. This is considered an excursionas defined in 40 CFR Section 64.1. Make a record of all corrective actions taken.



















13700027 - 009

Facility Name:

Permit Number:

03/19/15A-36














13700027 - 009

Facility Name:

Permit Number:

03/19/15A-37





























13700027 - 009

Facility Name:

Permit Number:

03/19/15A-38














13700027 - 009

Facility Name:

Permit Number:

03/19/15A-39

Subject Item: CE 004 Fabric Filter - Low Temperature, i.e., T<180 Degrees F

Associated Items: EU 004 Coal Ash Silo - Silo/Bin


The Permittee shall operate and maintain the fabric filter at all times that anyemission unit controlled by the fabric filter is in operation. The Permittee shalldocument periods of non-operation of the control equipment when the emission unitis in operation.


The Permittee shall operate and maintain the fabric filter in accordance with theOperation and Maintenance (O & M) Plan. The Permittee shall keep copies of theO & M Plan available onsite for use by staff and MPCA staff.

Minn. R. 7007.0800, subp. 14

The Permittee shall operate and maintain the fabric filter such that it achieves anoverall control efficiency for Total Particulate Matter: greater than or equal to 99.0percent control efficiency

Minn. R. 7011.0070, subp. 1(A)

The Permittee shall operate and maintain the fabric filter such that it achieves anoverall control efficiency for PM < 10 micron: greater than or equal to 93.0 percentcontrol efficiency

Minn. R. 7011.0070, subp. 1(A)

Pressure Drop: greater than or equal to 2.0 inches of water column and less than orequal to 10.0 inches of water column , unless a new range is set pursuant to Minn.R. 7017.2025, subp. 3 based on the values recorded during the most recentMPCA-approved performance test where compliance was demonstrated. The newrange shall be implemented upon receipt of the Notice of Compliance lettergranting preliminary approval. The range is final upon issuance of a permitamendment incorporating the change.


Visible Emissions: The Permittee shall check the fabric filter stack (SV 004) for anyvisible emissions once each day of operation, while the controlled operation isoperating, during daylight hours. During inclement weather, the Permittee shallinstead read and record the pressure drop across the fabric filters, once each dayof operation, while the controlled operation is operating.


Recordkeeping of Visible Emissions and Pressure Drop. The Permittee shallrecord the time and date of each visible emission inspection or pressure dropreading, and whether or not any visible emissions were observed, or whether theobserved pressure drop was within the range specified in this permit.



- visible emissions are observed; or- the recorded pressure drop is outside the required operating range; or- the fabric filter or any of its components are found during the inspections to needrepair.

Corrective actions shall return the pressure drop to within the permitted range,eliminate visible emissions, and/or include completion of necessary repairsidentified during the inspection, as applicable. Corrective actions include, but arenot limited to, those outlined in the O & M Plan for the fabric filter. The Permitteeshall keep a record of the type and date of any corrective action taken for each filter.

Minn. R. 7007.0800, subp. 4; Minn. R. 7007.0800,subp. 5; Minn. R. 7007.0800, subp. 14

Monitoring Equipment: The Permittee shall install and maintain the necessarymonitoring equipment for measuring and recording pressure drop as required bythis permit. The monitoring equipment must be installed, in use, and properlymaintained when the monitored fabric filter is in operation.

Minn. R. 7007.0800, subp. 4

Periodic Inspections: At least once per calendar quarter, or more frequently asrequired by the manufacturing specifications, the Permittee shall inspect the controlequipment components. The Permittee shall maintain a written record of theseinspections.



13700027 - 009

Facility Name:

Permit Number:

03/19/15A-40

Subject Item: CE 005 Multiple Cyclone w/o Fly Ash Reinjection - Most Multiclones

Associated Items: EU 007 Wood Fired Boiler with gas burner (19.4 MW) - Boiler


EMISSION AND OPERATIONAL LIMITS hdr

The Permittee shall operate and maintain the collector in accordance with the O &M Plan. The Permittee shall keep copies of the O & M Plan available onsite for useby staff and MPCA staff.

Minn. R. 7007.0800, subp. 14

RECORDKEEPING AND MONITORING REQUIREMENTS hdr

Periodic Inspections: At least semiannually, or more frequently as required by themanufacturing specifications, the Permittee shall inspect the control equipmentcomponents. The Permittee shall maintain a written record of these inspections.



13700027 - 009

Facility Name:

Permit Number:

03/19/15A-41






The Permittee shall operate and maintain the electrostatic precipitator such that itachieves an overall control efficiency for Total Particulate Matter: greater than orequal to 96 percent control efficiency


The Permittee shall operate and maintain the electrostatic precipitator such that itachieves an overall control efficiency for PM < 10 micron: greater than or equal to95 percent control efficiency


The Permittee shall operate and maintain the electrostatic precipitator such that itachieves an overall control efficiency for PM < 2.5 micron: greater than or equal to94 percent control efficiency

Minn. R. 7007.0800, subp. 2


Title I Condition: 40 CFR Section 52.21(j); Minn. R.7007.3000; Minn. R. 7007.0800, subp. 5.


Title I Condition: 40 CFR Section 52.21(j); Minn. R.7007.3000; Minn. R. 7017.2025, subp. 3; Minn. R.7007.0800, subp. 5.

Opacity: less than or equal to 8.0 percent opacity using 3-hour Average . Opacity inexcess of this limit shall be considered an excursion under 40 CFR Section64.6(c)(2), for purposes of the PM limit for EU 007. This applies for all types andqualities of fuel burned in EU 007.















13700027 - 009

Facility Name:

Permit Number:

03/19/15A-42














13700027 - 009

Facility Name:

Permit Number:

03/19/15A-43

Subject Item: CE 007 Selective Noncatalytic Reduction for NOX



The Permittee shall operate and maintain the SNCR in accordance with the O & MPlan. The Permittee shall keep copies of the O & M Plan available onsite for use bystaff and MPCA staff.


The Permittee shall record the urea feed rate once each day of operation of EU007. If the feed rate is above the maximum listed in this permit, take correctiveaction (as outlined in the O & M plan) within 24 hours of discovery. This isconsidered an excursion as defined in 40 CFR Section 64.1. Record the time anddate of each reading and all corrective actions taken.

Title I Condition: 40 CFR 52.21(j); Minn. R. 7007.3000;Minn. R. 7007.0800, subp. 2; Minn. R. 7007.0800,subp. 14

Maximum Urea Feed Rate: less than or equal to 5.0 gallons/hr using 3-hour BlockAverage, unless a new limit is set pursuant to Minn. R. 7017.2025, subp. 3 basedon the values recorded during the most recent MPCA-approved performance testwhere compliance was demonstrated. The new limit shall be implemented uponreceipt of the Notice of Compliance letter granting preliminary approval. The limit isfinal upon issuance of a permit amendment incorporating the change.

Title I Condition: 40 CFR 52.21(j); Minn. R. 7007.3000;Minn. R. 7017.2025, subp. 3; Minn. R. 7007.0800,subp. 2; Minn. R. 7007.0800, subp. 14

The SNCR system will be adjusted or may be shut down when the ammonia slipexceeds the limit set at EU 007, until such time as the system is returned to normaloperation.

Minn. R. 7007.0800, subp. 2

SNCR monitoring: The NOX CEMS (MR 011) for the emission unit (EU 007) shallbe used to assess proper operation of the SNCR.

40 CFR Section 64.7(a); Minn. R. 7007.0800, subp. 2;Minn. R. 7017.0200

Continuous Monitoring: The Permittee shall continuously, or at a minimum onceevery 15 minutes, monitor the NOX emissions in the exhaust.

See Subject Item GP 005 for specific CEMS operating requirements.


Monitoring Equipment: The Permittee shall install and maintain the necessarymonitoring equipment for measuring and recording the Urea Feed Rate as requiredby this permit. The monitoring equipment must be installed, in use, and properlymaintained when the monitored SNCR is in operation.


Periodic Inspections: At least semiannually, or more frequently as required by themanufacturing specifications, the Permittee shall inspect the control equipmentcomponents. The Permittee shall maintain a written record of these inspections.


Corrective Actions: The Permittee shall take corrective action as soon as possibleif any of the following occur:

- the monitored NOX emission rate exceeds any applicable NOX limit; or- the recorded urea feed rate is outside the required operating range; or- the SNCR or any of its components are found during the inspectionsto need repair.

Corrective actions shall return the Urea feed rate to within the permitted range,eliminate visible emissions, and/or include completion of necessary repairsidentified during the inspection, as applicable. Corrective actions include, but arenot limited to, those outlined in the O&M Plan for the SNCR. The Permitteeshall keep a record of the type and date of any corrective action taken.









13700027 - 009

Facility Name:

Permit Number:

03/19/15A-44




13700027 - 009

Facility Name:

Permit Number:

03/19/15A-45


Associated Items: EU 008 Enclosed wood unloading - Loading-Unloading Equipment





Minn. R. 7007.0800, subp. 14


Minn. R. 7011.0070, subp. 1(A)


Minn. R. 7011.0070, subp. 1(A)












Minn. R. 7007.0800, subp. 4




13700027 - 009

Facility Name:

Permit Number:

03/19/15A-46


Associated Items: EU 010 Wood Conveyor System - Conveyor





Minn. R. 7007.0800, subp. 14


Minn. R. 7011.0070, subp. 1(A)


Minn. R. 7011.0070, subp. 1(A)












Minn. R. 7007.0800, subp. 4




13700027 - 009

Facility Name:

Permit Number:

03/19/15A-47


Associated Items: EU 011 Wood Transfer/Metering Bin - Silo/Bin





Minn. R. 7007.0800, subp. 14


Minn. R. 7011.0070, subp. 1(A)


Minn. R. 7011.0070, subp. 1(A)












Minn. R. 7007.0800, subp. 4




13700027 - 009

Facility Name:

Permit Number:

03/19/15A-48

Subject Item: FS 002 Truck Traffic - Paved Road


If the temperature is less than 32 degrees F, and the pavement is dry, sweeping ofall traffic areas is required twice monthly.

Sweeping is not required if the pavement is snow or ice covered.

If the temperature is greater than 32 degrees F, and the pavement is dry, sweepingand flushing are required twice monthly.

Minn. R. 7011.0150


13700027 - 009

Facility Name:

Permit Number:

03/19/15A-49

Subject Item: FS 003 Coal Ash Loadout - Material Handling/Transfer/Storage


Ash shall be wetted prior to loadout. Title I Condition: 40 CFR Section 52.21(k); Minn. R.7007.3000


13700027 - 009

Facility Name:

Permit Number:

03/19/15A-50

Subject Item: FS 004 Wood Ash Loadout - Material Handling/Transfer/Storage


Ash shall be wetted prior to loadout. Title I Condition: 40 CFR Section 52.21(k); Minn. R.7007.3000

TABLE B: SUBMITTALSFacility Name: Hibbing Public Utilities Commission

Permit Number: 13700027 - 009

03/19/15B-1

Also, where required by an applicable rule or permit condition, send to the Permit Document Coordinator notices of:- accumulated insignificant activities,- installation of control equipment,- replacement of an emissions unit, and- changes that contravene a permit term.

Send submittals that are required to be submitted to the U.S. EPA regional office to:

Chief Air Enforcement Air and Radiation Branch EPA Region V 77 West Jackson Boulevard Chicago, Illinois 60604

Table B lists most of the submittals required by this permit. Please note that some submittal requirements may appear in Table Aor, if applicable, within a compliance schedule located in Table C. Table B is divided into two sections in order to separately listone-time only and recurrent submittal requirements.

Send submittals that are required by the Acid Rain Program to:

U.S. Environmental Protection Agency Clean Air Markets Division 1200 Pennsylvania Avenue NW (6204N) Washington, D.C. 20460

Send any application for a permit or permit amendment to:

Fiscal Services Minnesota Pollution Control Agency 520 Lafayette Road North St. Paul, Minnesota 55155-4194

Each submittal must be postmarked or received by the date specified in the applicable Table. Those submittals required by parts7007.0100 to 7007.1850 must be certified by a responsible official, defined in Minn. R. 7007.0100, subp. 21. Other submittals shallbe certified as appropriate if certification is required by an applicable rule or permit condition.

Unless another person is identified in the applicable Table, send all other submittals to:

AQ Compliance Tracking Coordinator Industrial Division Minnesota Pollution Control Agency 520 Lafayette Road North St. Paul, Minnesota 55155-4194

TABLE B: ONE TIME SUBMITTALS OR NOTIFICATIONSFacility Name: Hibbing Public Utilities Commission


03/19/15B-2

What to send When to send Portion of Facility Affected

Application for Permit Reissuance due 180 days before expiration of ExistingPermit

Total Facility

Notification of compliance status due 30 days before Performance Testrequired by 40 CFR Section 60.8 if COMSdata results will be used in lieu of 40 CFR,Appendix A, Method 9 observation data todetermine compliance with the opacitystandard as allowed by 40 CFR Section60.11(e)(5).

MR010

Notification of the Actual Date of Initial Startup due 15 days after Initial Startup of EU 007following completion of modificationsauthorized for EU 007 by Air EmissionsPermit No. 13700027-009.

EU007

Notification of the Date Construction Began due 30 days after Start Of Construction ofmodifications authorized for EU 007 by AirEmissions Permit No. 13700027-009.

EU007

Report due 10 days before Performance Testrequired under 40 CFR Section 60.8 and asdescribed in Section 60.11(e)(5) if the owneror operator of an affected facility elects tosubmit COMS data in lieu of the performancetest to demonstrate compliance with theopacity standard. If instead the performanceevalution is completed during the performancetest or within 30 days thereafter as allowed bySection 60.13(c), the report is due within 60days of completion.

MR010

Submittal of Permit Application due 180 days before 01/31/2016. ThePermittee shall submit an application for anamendment to incorporate all applicablerequirements of 40 CFR pt. 63, subp. DDDDDfor all boilers subject to the standard.

Total Facility

TABLE B: RECURRENT SUBMITTALSFacility Name: Hibbing Public Utilities Commission


03/19/15B-3

What to send When to send Portion of Facility Affected

COMS Calibration Error Audit ResultsSummary

due 30 days after end of each calendarquarter starting 01/18/2012 in which theCOMS calibration error audit was completed.

MR010, MR021, MR022

Cylinder Gas Audit (CGA) Results Summary due 30 days after end of each calendarquarter starting 01/18/2012 in which a CGAwas conducted.

MR011, MR012, MR013, MR017, MR018,MR019, MR020

Excess Emissions/Downtime Reports (EER's) due 30 days after end of each calendarquarter starting 01/18/2012 . SubmitDeviations Reporting Form DRF-1 asamended. The EER shall indicate all periodsof monitor bypass and all periods ofexceedances of the limit includingexceedances allowed by an applicablestandard, i.e. during startup, shutdown, andmalfunctions. The EER must be submittedeven if there were no excess emissions,downtime or bypasses during the quarter.

Total Facility

Relative Accuracy Test Audit (RATA) ResultsSummary

due before end of each calendar quarterstarting 01/18/2012 in which a RATA wasconducted.

MR011, MR012, MR013, MR017, MR018,MR019, MR020

Semiannual Deviations Report due 30 days after end of each calendarhalf-year starting 01/18/2012 . The first reportof each calendar year covers January 1 - June30. The second report of each calendar yearcovers July 1 - December 31. If no deviationshave occurred, the Permittee shall submit thereport stating no deviations.

Total Facility

Compliance Certification due 30 days after end of each calendar yearstarting 09/12/1997 (for the previous calendaryear). The Permittee shall submit this to theCommissioner on a form approved by theCommissioner. This report covers alldeviations experienced during the calendaryear.

Total Facility

APPENDIX B Facility Name: Hibbing Public Utilities Commission

Permit Number: 13700027‐009

Appendix B, Page 1

Insignificant Activities: The table below lists the insignificant activities that are currently at the facility and their associated general applicable requirements.

Minn. R. 7007.1300, subpart

Rule Description of the Activity Applicable Requirement

3(D) Processing operations: open tumblers with a batch capacity of 1,000 pounds or less Hibbing Public Utilities Commission operates a bead blasting operation.

Minn. R. 7011.0710/0715

3(H)(3) Brazing, soldering or welding equipment. Hibbing Public Utilities Commission operates 4 welders.

Minn. R. 7011.0710/0715

3(I) Individual emissions units at a stationary source, each of which have a potential to emit the following pollutants in amounts less than: 1. 4,000 lbs/year of carbon monoxide; and 2. 2,000 lbs/year each of nitrogen oxide, sulfur dioxide, particulate matter, particulate matter less than ten microns, volatile organic compounds (including hazardous air pollutant‐containing VOC), and ozone. and 3. 1,000 tons/year of CO2e. Hibbing Public Utilities Commission has coal handling operations including coal unloading (formerly identified as FS 001, uncontrolled PM = 0.0083 tpy) and coal pit dumping (formerly identified as FS 005, uncontrolled PM = 0.033 tpy).

Minn. R. 7011.0150Minn. R. 7011.1110

3(K) Infrequent use of spray paint equipment for routine housekeeping or plant upkeep activities not associated with primary production processes at the stationary source, such as spray painting of buildings, machinery, vehicles, and other supporting equipment. Hibbing Public Utilities Commission uses aerosol paints for plant maintenance.

Minn. R. 7011.0715

4 Individual emissions units at a stationary source, each of which have a potential to emit the following pollutants in amounts less than: A. Potential emissions of 5.7 lbs/hour or actual emissions of two tons/year of carbon monoxide; B. Potential emissions of 2.28 lbs/hour or actual emissions of one ton/year for particulate matter, particulate matter less than ten microns, nitrogen oxide, sulfur dioxide, and VOCs; C. For hazardous air pollutants, emissions units with: (1) potential emissions of 25 percent or less of the hazardous air pollutant thresholds listed in Minn. R. 7007.1300, subp. 5; or (2) combined HAP actual emissions of one ton/year unless the emissions unit emits one or more of the HAPs listed in this subpart; and D. Potential emission up to 10,000 tons/year or actual emissions up to 1000 tons/year CO2e. Hibbing Public Utilities Commission has a reserve coal pile (actual emissions based on highest throughput 2000 – 2009 = 0.013 tpy PM) and two cooling towers, the east cooling tower (formerly identified as EU014, potential PM = 2.05 lb/hr), and the west cooling tower (formerly identified as EU014, potential PM = 2.05 lb/hr).

Minn. R. 7011.0150Minn. R. 7011.1110 Minn. R. 7011.0710/0715

APPENDIX B Facility Name: Hibbing Public Utilities Commission


Appendix B, Page 2

Conditionally Insignificant Activities: The table below lists the conditionally insignificant activities that are currently at the facility and their associated general applicable requirements.

Minn. R. 7008.4100, subpart

Rule Description of the Activity Applicable Requirement

2 Total VOC Usage at the stationary source less than 200 gallons or 2000 pounds in each calendar year. See Minn. R. 7008.4100 for recordkeeping and calculation requirements for this activity. Hibbing Public Utilities Commission uses VOC‐containing cleaning solvent facility wide.

Minn. R. 7011.0710/0715

APPENDIX C Facility Name: Hibbing Public Utilities Commission


Appendix C, Page 1

Modeling Information (Wood‐Fired Boiler Installation) Modeling Input Parameter Data: The facility performed a preliminary analysis to determine whether the installation of the wood‐fired boiler exceeded the Significant Impact Level (SIL) for each pollutant and averaging period and modeled just the impact of the project in that scenario. The results showed that the project’s predicted impacts for NO2 and CO were below the SIL for each averaging period. Therefore, full impact modeling for these pollutants was not required nor performed. The project’s predicted impacts for PM10 were above the SIL for each averaging period and required full impact modeling that included background and nearby sources. The parameters shown in the tables below reflect the parameters used to demonstrate modeled compliance with ambient air quality standards in effect at the time of modeling for Air Emission Permit 13700027‐005. The tables below contain the modeling input data used in modeling the installation of a wood‐fired boiler. Flow rates and temperatures listed represent the minimum parameters at the maximum emission rate. Flow rate and temperature will fluctuate with boiler load; as boiler load decreases, flow rate, temperature, and emission rates will also decrease. The purpose of listing the parameters in the appendix is to provide a benchmark for future changes.

Stack Modeled Parameters (Point Source NO2 Emissions)

Permit ID

Description Easting (m)

Northing(m)

Elevation(m)

Stack Height (m)

Stack Diameter

(m)

Exit Velocity (m/s)

Exit Temperature

(K)

NO2 Emission Rate (g/sec)

NO2 Emission Rate (lb/hr)

SV 007 Wood Boiler 504,967.40 5,252,872.30 451.92 45.72 1.98 14.48 435.93 4.334 34.397

Stack Modeled Parameters (Point Source CO Emissions)

Permit ID


Northing(m)

Elevation(m)

Stack Height (m)

Stack Diameter

(m)

Exit Velocity (m/s)

Exit Temperature

(K)

CO Emission Rate (g/sec)

CO Emission Rate(lb/hr)

SV 007 Wood Boiler 504,967.40 5,252,872.30 451.92 45.72 1.98 14.48 435.93 11.592 92.001



Appendix C, Page 2

Stack Modeled Parameters (Point Source PM10 Emissions)*

Permit ID


Northing(m)

Elevation(m)

Stack Height (m)

StackDiameter

(m)

Exit Velocity (m/s)

Exit Temperature

(K)

PM10 Emission Rate (g/sec)

PM10 Emission Rate (lb/hr)

SV 001 Boiler 1A 504,940.00 5,252,880.00 451.25 34.49 2.35 11.9 449.70 2.016 16

SV 002 Boiler 2A 504,940.00 5,252,890.00 451.25 34.49 2.35 11.9 449.70 2.016 16

SV 003 Boiler 3A 504,924.20 5,252,909.20 452.18 37.08 2.29 17 449.70 4.032 32

SV 004 Coal Ash Silo 504,930.70 5,252,882.70 452.18 24.72 0.30 15.35 310.93 0.004 0.034

SV 005 High School Boiler 1 505,155.60 5,252,379.80 453.71 42.67 0.59 13.77 1255.37 0.034 0.268

SV 006 High School Boiler 2 505,155.80 5,252,373.30 453.73 42.67 0.59 12.02 1255.37 0.034 0.268

SV 007 Wood Boiler 504,967.40 5,252,872.30 451.92 45.72 1.98 14.48 435.93 0.724 5.75

SV 008 Wood

Unloading 504,889.00 5,252,965.00 452.40 12.57 0.71 36.05 294.26 0.076 0.6

SV 009 Wood Silo Vent 504,979.00 5,252,975.00 451.25 18.29 0.14 44.11 294.26 0.006 0.051

SV 010 Wood Silo Vent 504,979.00 5,252,951.00 451.25 18.29 0.14 44.11 294.26 0.006 0.051

SV 011 Wood Conveyor 504,965.70 5,252,960.00 451.79 9.14 0.15 46.57 294.26 0.015 0.12

SV 012 Wood Meter 504,962.70 5,252,927.20 451.86 25.91 0.22 45.16 294.26 0.015 0.12

SV 014 Ash Silo Vent 1 504,967.00 5,252,894.00 451.25 12.19 0.35 60.57 294.26 0.0002 0.002

SV 015 Cooling Tower 504,900.40 5,252,949.50 452.30 9.55 5.49 11.13 310.93 0.129 1.026

SV 016 Cooling Tower 504,906.60 5,252,949.60 452.24 9.55 5.49 11.13 310.93 0.129 1.026

SV 017 Cooling Tower 504,921.00 5,252,950.00 452.12 11.99 5.49 9.96 310.93 0.129 1.026

SV 018 Cooling Tower 504,927.50 5,252,950.10 452.07 11.99 5.49 9.96 310.93 0.129 1.026

SV 019 Boilers 1A and

2A 504,923.30 5,252,873.00 452.25 47.24 3.20 12.81 454.82 4.032 32

*Items that are listed with a strikethrough were removed from the facility as part of Air Emission Permit 13700027‐007. The values that were used in modeling are included, even though the items have been removed, to maintain a complete record. The emergency generator (SV 013) was not modeled as it only for emergency use and is not operated when other boilers are operating. It was also removed from the facility as part of Air Emission Permit 13700027‐007.



Appendix C, Page 3

Predicted Impacts and Modeled Concentrations: The tables below display the results of the modeling done to show compliance with ambient air quality standards in effect at the time of modeling for Air Emission Permit 13700027‐005. Pollutant Averaging Period NAAQS

(µg/m3) MAAQS(µg/m3)

Significant Impact Level (SIL) (µg/m3)

Modeled Impact(µg/m3)

Percent of SIL(%)

NO2 Annual 100 100 1 0.56 56

CO 1‐hour 40,000 35,000 2,000 114.41 5.72

CO 8‐hour 10,000 10,000 500 66.29 13.26

Pollutant Averaging Period

NAAQS (µg/m3)

MAAQS(µg/m3)

Class II Increment (µg/m3)

Increment Consumption

(µg/m3)

Percent of Increment

(%)


Percent of NAAQS/MAAQS

(%)

PM10 Annual 50 50 17 2.89 17 46.82 93.64

PM10 24‐hour 150 150 30 15.76 52.53 123.04 82.03

APPENDIX D Facility Name: Hibbing Public Utilities Commission


Appendix D, Page 1

Modeling Information (1‐hour NO2 and SO2 NAAQS Demonstration) Modeling Input Parameter Data: The tables below display the modeling input data used to show compliance with the National Ambient Air Quality Standards (NAAQS) and Minnesota Ambient Air Quality Standards (MAAQS) for NO2 and SO2. The tables contain the modeling input data for the Hibbing Public Utilities Commission facility in Hibbing, MN as well as nearby sources. The parameters describe the operation of the facility at maximum permitted capacity. The purpose of listing the parameters in the appendix is to provide a benchmark for future changes.


Modeling ID Permit ID

Description Easting(m)

Northing(m)

Elevation(m)

Stack Height (m)

Stack Diameter

(m)

Exit Velocity (m/s)

Exit Temperature

(K)



HPU SV003 SV 003 Boiler 3A 504,924.20 5,252,909.20 452.18 37.08 2.29 17 449.82 16.18 128.38

HPU SV004 SV 004 Coal Ash Silo 504,930.70 5,252,882.70 452.18 24.72 0.30 15.35 310.93 0 0

HPU SV005 SV 005 High School Boiler 1 505,155.60 5,252,379.80 453.71 42.67 0.59 13.77 1255.37 0.44 3.53

HPU SV006 SV 006 High School Boiler 2 505,155.80 5,252,373.30 453.73 42.67 0.59 12.02 1255.37 0.44 3.53

HPU SV007 SV 007 Wood Boiler 504,967.40 5,252,872.30 451.92 45.72 1.98 14.48 435.93 8.70 69.0

HPU SV008 SV 008 Wood Unloading 504,889.00 5,252,965.00 452.40 12.57 0.71 36.05 294.26 0 0

HPU SV011 SV 011 Wood Conveyer 504,965.70 5,252,960.00 451.79 12.19 0.15 46.57 294.26 0 0

HPU SV012 SV 012 Wood Meter 504,962.70 5,252,927.20 451.86 27.84 0.22 45.16 294.26 0 0

HPU SV015 SV 015 Cooling Tower 504,900.40 5,252,949.50 452.30 9.55 5.49 11.13 310.93 0 0




HPU SV019 SV 019 Boilers 1A and 2A 504,923.30 5,252,873.00 452.25 47.24 3.20 12.81 454.82 28.18 223.62

AMM SV014 535,954.61 5,267,628.30 494.17 36.15 2.67 17.3 322 23.85 189.31

AMM SV015 535,960.61 5,267,628.30 494.43 36.06 2.67 16.9 322 26.51 210.4

AMM SV016 535,966.61 5,267,628.30 494.62 36.06 2.67 16.4 322 38.33 304.21

AMM SV017 535,972.61 5,267,628.30 494.74 36.06 2.67 19 322 48.4 384.1

HTC SV021 502,366.90 5,258,307.50 497.56 36.27 2.68 18.79 310.9 24.57 195



Appendix D, Page 2




Northing(m)

Elevation(m)

Stack Height (m)

Stack Diameter

(m)

Exit Velocity (m/s)

Exit Temperature

(K)



HTC SV022 502,377.10 5,258,308.80 497.57 36.27 2.68 18.79 313.7 24.57 195

HTC SV023 502,384.70 5,258,309.80 497.66 36.27 2.68 18.79 319.3 24.57 195

HTC SV024 502,393.10 5,258,311.70 497.88 36.27 2.68 18.79 322 24.57 195

HTC SV025 502,425.00 5,258,313.70 499.28 36.27 2.68 18.79 322 24.57 195

HTC SV026 502,433.80 5,258,315.90 499.12 36.27 2.68 18.79 319.3 24.57 195

HTC SV027 502,443.90 5,258,317.60 499.08 36.27 2.68 18.79 313.7 24.57 195

HTC SV028 502,453.90 5,258,320.20 498.92 36.27 2.68 18.79 310.9 24.57 195

HTC SV029 502,468.00 5,258,324.50 498.70 36.27 2.68 18.79 310.9 24.57 195

HTC SV030 502,476.70 5,258,324.80 498.83 36.27 2.68 18.79 313.7 24.57 195

HTC SV031 502,485.10 5,258,326.70 498.78 36.27 2.68 18.79 319.3 24.57 195

HTC SV032 502,490.80 5,258,328.30 498.70 36.27 2.68 18.79 322 24.57 195

KTC EGEN4 494,600.30 5,252,223.08 481.51 3.05 0.31 58.24 588.71 3.91 30.99

KTC SHP01 495,000.00 5,251,100.00 456.94 11.7 0.15 7.34 450 0.5 3.94

KTC SV051 495,489.98 5,251,009.25 455.24 48.77 5.77 15.31 327.6 248.8 1974.65

KTC SV058 495,318.21 5,250,982.12 454.43 65 2.95 21.1 347.1 94.4 749.22

USX SV001 527,605.44 5,268,166.23 520.74 20.5 1.37 5.43 466.48 13.71 108.8

USX SV002 527,612.14 5,268,167.19 519.97 20.5 1.37 5.43 466.48 13.71 108.8

USX SV003 527,619.14 5,268,168.20 519.17 20.5 1.37 6.64 466.48 16.51 131

USX SV004 527,627.00 5,268,169.38 518.30 20.91 1.37 8.15 466.48 20.24 160.64

USX SV005 527,633.90 5,268,170.38 517.50 20.91 1.37 8.15 466.48 20.24 160.64

USX SV010 527,646.16 5,266,984.45 493.07 17.93 0.76 4.24 466.48 0.86 6.84

USX SV011 527,650.71 5,266,985.14 493.06 17.93 0.76 4.24 466.48 0.86 6.84

USX SV019 527,252.45 5,267,524.12 537.41 9.75 0.51 85.12 644.26 0.05 0.38

USX SV020 527,164.35 5,267,449.81 534.56 9.75 0.51 85.12 644.26 0.1 0.76

USX SV086 527,183.75 5,267,919.90 556.90 8.84 0.51 85.12 644.26 0.1 0.76

USX SV103 528,069.94 5,268,291.29 531.25 35.36 3.05 20.83 385.93 50.44 400.3

USX SV118 528,116.57 5,268,294.62 532.64 42.55 4.27 21.45 319.26 119.1 945.22

USX SV127 528,130.92 5,268,296.41 533.71 42.55 4.27 21.45 319.26 163.86 1300.48

USX SV144 528,434.37 5,268,236.18 532.14 42.67 3.96 26.91 349.82 91.54 726.5

USX SV151 528,377.69 5,268,245.79 534.44 42.67 4.88 15.16 315.93 44.61 354.06



Appendix D, Page 3




Northing(m)

Elevation(m)

Stack Height (m)

Stack Diameter

(m)

Exit Velocity (m/s)

Exit Temperature

(K)



USX SV189 528,094.32 5,267,761.70 530.83 14.02 0.61 0 422.04 0.14 1.1

USX SV190 528,141.06 5,267,786.91 531.43 14.02 0.51 0 699.82 0.14 1.1

UTP SV046 532,010.00 5,244,397.70 419.49 42.67 3.05 23.9 327 166.32 1320.01

UTP SV048 531,998.10 5,244,380.50 418.60 46.63 3.66 14.1 323.2 189.25 1502.02

UTP SV049 531,976.30 5,244,439.10 417.51 46.63 3.66 14.1 323.2 161.15 1279.01

VPU SV002 534,554.00 5,263,319.00 436.33 45.72 2.13 12.92 441.48 9.27 73.6

VPU SV003 534,544.00 5,263,308.00 436.24 45.72 1.52 27.65 472.04 14.91 118.32

VPU SV004 534,536.00 5,263,339.00 436.15 45.72 1.83 15.82 429.82 3.89 30.86

VPU SV005 534,552.00 5,263,264.00 436.39 45.72 1.98 15.17 430.37 4.35 34.5

Key: HPU = Hibbing Public Utilities Commission AMM = ArcelorMittal Minorca Mine HTC = Hibbing Taconite Company KTC = US Steel Corporation ‐ Keetac USX = US Steel Corporation ‐ Minntac UTP = United Taconite LLC ‐ Fairlane Plant VPU = Virginia Department of Public Utilities

Stack Modeled Parameters (Point Source SO2 Emissions)



Northing(m)

Elevation(m)

Stack Height (m)

Stack Diameter

(m)

Exit Velocity (m/s)

Exit Temperature

(K)

SO2 Emission Rate (g/sec)

SO2 EmissionRate (lb/hr)

HPU SV003 SV 003 Boiler 3A 504,924.20 5,252,909.20 452.18 36.88 2.29 17 449.82 28.12 223.2

HPU SV004 SV 004 Coal Ash Silo 504,930.70 5,252,882.70 452.18 24.72 0.3 15.35 310.93 0 0

HPU SV005 SV 005 High School Boiler 1 505,155.60 5,252,379.80 453.71 42.67 0.59 13.77 1255.37 0 0.02

HPU SV006 SV 006 High School Boiler 2 505,155.80 5,252,373.30 453.73 42.67 0.59 12.02 1255.37 0 0.02

HPU SV007 SV 007 Wood Boiler 504,967.40 5,252,872.30 451.92 45.72 1.98 14.48 435.93 0.72 5.75

HPU SV008 SV 008 Wood Unloading 504,889.00 5,252,965.00 452.40 12.57 0.71 36.05 294.26 0 0



Appendix D, Page 4




Northing(m)

Elevation(m)

Stack Height (m)

Stack Diameter

(m)

Exit Velocity (m/s)

Exit Temperature

(K)



HPU SV011 SV 011 Wood Conveyer 504,965.70 5,252,960.00 451.79 12.19 0.15 46.57 294.26 0 0

HPU SV012 SV 012 Wood Meter 504,962.70 5,252,927.20 451.86 27.84 0.22 45.16 294.26 0 0





HPU SV019 SV 019 Boilers 1A and 2A 504,923.30 5,252,873.00 452.25 47.24 3.2 12.81 454.82 48.99 388.8

HTC SV021 502,366.90 5,258,307.50 497.56 36.27 2.68 18.79 310.9 3.7 29.37

HTC SV022 502,377.10 5,258,308.80 497.57 36.27 2.68 18.79 313.7 3.7 29.37

HTC SV023 502,384.70 5,258,309.80 497.66 36.27 2.68 18.79 319.3 3.7 29.37

HTC SV024 502,393.10 5,258,311.70 497.88 36.27 2.68 18.79 322 3.7 29.37

HTC SV025 502,425.00 5,258,313.70 499.28 36.27 2.68 18.79 322 3.7 29.37

HTC SV026 502,433.80 5,258,315.90 499.12 36.27 2.68 18.79 319.3 3.7 29.37

HTC SV027 502,443.90 5,258,317.60 499.08 36.27 2.68 18.79 313.7 3.7 29.37

HTC SV028 502,453.90 5,258,320.20 498.92 36.27 2.68 18.79 310.9 3.7 29.37

HTC SV029 502,468.00 5,258,324.50 498.70 36.27 2.68 18.79 310.9 3.7 29.37

HTC SV030 502,476.70 5,258,324.80 498.83 36.27 2.68 18.79 313.7 3.7 29.37

HTC SV031 502,485.10 5,258,326.70 498.78 36.27 2.68 18.79 319.3 3.7 29.37

HTC SV032 502,490.80 5,258,328.30 498.70 36.27 2.68 18.79 322 3.7 29.37

KTC EGEN4 494,600.30 5,252,223.08 481.51 3.05 0.31 58.24 588.71 0.26 2.05

KTC IAPLT 495,015.26 5,251,090.00 456.84 21.95 1.98 0.01 309.82 0 0.01

KTC SHP01 495,000.00 5,251,100.00 456.94 11.7 0.15 7.34 450 0 0.02

KTC SHP05 495,375.00 5,251,025.00 454.60 44.9 0.15 7.34 450 0.01 0.05

KTC SV051 495,489.98 5,251,009.25 455.24 48.77 5.77 15.31 327.6 34.3 272.23

KTC SV058 495,318.21 5,250,982.12 454.43 65 2.95 21.1 347.1 2.94 23.33

KTC SV060 495,319.98 5,250,973.03 454.43 65 2.06 23.25 347.1 0.79 6.3

USX SV001 527,605.44 5,268,166.23 520.74 20.5 1.37 5.43 466.48 0.66 5.24

USX SV002 527,612.14 5,268,167.19 519.97 20.5 1.37 5.43 466.48 0.66 5.24

USX SV003 527,619.14 5,268,168.20 519.17 20.5 1.37 6.64 466.48 0.8 6.35



Appendix D, Page 5




Northing(m)

Elevation(m)

Stack Height (m)

Stack Diameter

(m)

Exit Velocity (m/s)

Exit Temperature

(K)



USX SV004 527,627.00 5,268,169.38 518.30 20.91 1.37 8.15 466.48 0.98 7.78

USX SV005 527,633.90 5,268,170.38 517.50 20.91 1.37 8.15 466.48 0.98 7.78

USX SV010 527,646.16 5,266,984.45 493.07 17.93 0.76 4.24 466.48 0.16 1.27

USX SV011 527,650.71 5,266,985.14 493.06 17.93 0.76 4.24 466.48 0.16 1.27

USX SV019 527,252.45 5,267,524.12 537.41 9.75 0.51 85.12 644.26 0.1 0.79

USX SV020 527,164.35 5,267,449.81 534.56 9.75 0.51 85.12 644.26 17.36 137.78

USX SV086 527,183.75 5,267,919.90 556.90 8.84 0.51 85.12 644.26 17.36 137.78

USX SV103 528,069.94 5,268,291.29 531.25 35.36 3.05 20.83 385.93 24.15 191.67

USX SV118 528,116.57 5,268,294.62 532.64 42.55 4.27 21.45 319.26 33.21 263.58

USX SV127 528,130.92 5,268,296.41 533.71 42.55 4.27 21.45 319.26 29.24 232.07

USX SV144 528,434.37 5,268,236.18 532.14 42.67 4.88 14.04 315.93 10.84 86.03

USX SV151 528,377.69 5,268,245.79 534.44 42.67 4.88 15.16 315.93 70.79 561.84

UTP SV046 532,010.00 5,244,397.70 419.49 42.67 3.05 23.9 327 0.97 7.7

UTP SV048 531,998.10 5,244,380.50 418.60 46.63 3.66 14.1 323.2 60.69 481.68

UTP SV049 531,976.30 5,244,439.10 417.51 46.63 3.66 14.1 323.2 51.68 410.17

VPU SV002 534,554.00 5,263,319.00 436.33 45.72 2.13 12.92 441.48 42.79 339.61

VPU SV003 534,544.00 5,263,308.00 436.24 45.72 1.52 27.65 472.04 42.79 339.61

VPU SV004 534,536.00 5,263,339.00 436.15 45.72 1.83 15.82 429.82 0.02 0.16

VPU SV005 534,552.00 5,263,264.00 436.39 45.72 1.98 15.17 430.37 0.72 5.75

Key: HPU = Hibbing Public Utilities Commission HTC = Hibbing Taconite Company KTC = US Steel Corporation ‐ Keetac USX = US Steel Corporation ‐ Minntac

UTP = United Taconite LLC ‐ Fairlane Plant VPU = Virginia Department of Public Utilities



Appendix D, Page 6

Modeled Parameters (Volume Source NO2 Emissions)



Northing(m)

Elevation(m)

Height(m)

Lateral (m)

Vertical(m)

Length(m)



KTC SHV02 495100 5251500 460.7 16.15 3.5 15.02 15.05 0.17 1.349

KTC SHV03 495022 5251850 467.14 8.15 3.5 7.58 15.05 0.122 0.968

KTC SHV04 495270 5251200 454.43 17.75 17.4 16.51 74.82 0.784 6.222

KTC SHV05 495375 5251025 454.6 21.95 17.4 20.42 74.82 0.251 1.992

KTC SHV06 495484 5250718 446.77 5.5 2.3 5.12 9.89 0.17 1.349

USX SV198 527224.15 5268065.88 536.84 11.43 13.95 10.63 59.99 1.058 8.397

Key: KTC = US Steel Corporation ‐ Keetac USX = US Steel Corporation ‐ Minntac

Modeled Parameters (Volume Source SO2 Emissions)



Northing(m)

Elevation(m)

Height(m)

Lateral (m)

Vertical(m)

Length(m)


SO2 Emission Rate (lb/hr)

KTC SHV02 495100 5251500 460.7 16.15 3.5 15.02 15.05 0.001 0.008

KTC SHV03 495022 5251850 467.14 8.15 3.5 7.58 15.05 0.001 0.006

KTC SHV04 495270 5251200 454.43 17.75 17.4 16.51 74.82 0.005 0.037

KTC SHV05 495375 5251025 454.6 21.95 17.4 20.42 74.82 0.002 0.012

KTC SHV06 495484 5250718 446.77 5.5 2.3 5.12 9.89 0.001 0.008

USX SV198 527224.15 5268065.88 536.84 11.43 13.95 10.63 59.99 0.006 0.049

Key: KTC = US Steel Corporation ‐ Keetac USX = US Steel Corporation ‐ Minntac Predicted Impacts and Modeled Concentrations: The table below displays the results of the modeling done to show compliance with the NAAQS and MAAQS for NO2 and SO2 at the Hibbing Public Utilities Commission facility.

Pollutant Averaging Period

NAAQS(µg/m3)

MAAQS(µg/m3)


Percent of NAAQS(%)

Percent of MAAQS(%)

NO2 1‐hour 188 ‐ 180.0 95.7 ‐

SO2 1‐hour 196 1300 164.5 83.9 12.7

draft/proposed air emission permit no. 13700027 009 …

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