December 29, 2009

Owen Orndorff Colstrip Energy Limited Partnership 1087 West River Street, Suite 200 Boise, ID 83702

RE: Final Title V Operating Permit #OP2035-02

Dear Mr. Orndorff:

The Department of Environmental Quality has prepared the enclo sed Final Operating Permit #OP2035- 02, for Colstrip Energy Limited Partnership, located in North 1/2, Section 32, Township 3 North, Range 41 East in Rosebud County, Montana. Please review the cover page of the attached permit for information pertaining to the action taking place on Permit #OP2035-02.

If you have any questions, please contact Debbie Skibicki , the lead permit engineer, at (406) 444-1472 or by email at dskibicki@mt.gov.

Sincerely,

Vickie Walsh Air Permitting Program Supervisor Air Resources Management Bureau (406) 444-9741 Trista Glazier Air Quality Specialist Air Resources Management Bureau (406) 444-3403

VW:TG: lr

Enclosure Cc: Christopher Ajayi, US EPA Region VIII 8P-AR Betsy Burns, US EPA Region VIII, Montana OfficeSTATE OF MONTANA Department of Environmental Quality Helena, Montana 59620

AIR QUALITY OPERATING PERMIT OP2035-02

Issued to: Colstrip Energy Limited Partnership 1/2, Section 32, Township 3 North, Range 41 East in Rosebud County, Montana 1087 West River Street, Suite 200 Boise, ID 83702

Final Date: December 25, 2009 Expiration Date: January 24, 2014

Effective Date: December 25, 2009

Date of Decision: November 24, 2009 End of EPA 45-day Review: November 23, 2009 Proposed Issue Date: October 7, 2009

Draft Issue Date: September 4, 2009

Application Deemed Technically Complete: March 31, 2009 Application Deemed Administratively Complete: March 31, 2009 Significant Modification Application Received: December 30, 2008

AFS Number: 030- 087-0007A

Permit Issuance and Appeal Processes: In accordance with Montana Code Annotated (MCA) Sections 75-2-217 and 218 and the Administrative Rules of Montana (ARM), ARM Title 17, Chapter 8, Subchapter 12, Operating Permit Progr am, this operating permit is hereby issued by the Department of Environmental Quality (Department) as effective a nd final on December 25, 2009. The permit must be kept on-site at the above named facility.

OP2035-02 i Date of Decision: 11/24/09

Effective Date: 12/25/09OP2035-02 ii Date of Decision: 11/24/09

Effective Date: 12/25/09 Montana Air Quality Operating Permit Department of Environmental Quality

SECTION I. GENERAL INFORMATION......................................................................................1

SECTION II. SUMMARY OF EMISSION UNITS ..........................................................................2

SECTION III. PERMIT CONDITIONS .............................................................................................3

A. F ACILITY -W IDE ....................................................................................................................3

B. EU001

– T RUCK T RANSPORT OF C OAL ................................................................................6

C. EU002

– T RUCK U NLOADING OF C OAL ; EU003

– C OAL C RUSHING AND T RANSPORT ; EU004

– C OAL B UNKER B IN V ENTS .....................................................................................7

D. EU005

– L IMESTONE U NLOADING

, H ANDLING

, AND S TORAGE ...........................................9

E. EU006

– C IRCULATING F LUIDIZED B ED B OILER ...............................................................10

F. EU007

– F LYASH C ONVEYING AND S TORAGE ; EU008

– B EDASH C ONVEYING AND S TORAGE ; EU009

– A SH S TORAGE S ILO U NLOADING ..........................................................16

G. EU010

- A SH T RUCK U NLOADING ......................................................................................18

H. EU011

– F UGITIVE E MISSIONS : A SH D ISPOSAL A REA ......................................................19

I. EU012

– F UGITIVE E MISSIONS : V EHICLE T RAFFIC ............................................................21

SECTION IV. NON-APPLICABLE REQUIREMENTS ................................................................23

A. F ACILITY -W IDE ..................................................................................................................23

B. E MISSION U NITS .................................................................................................................24

SECTION V. GENERAL PERMIT CONDITIONS.......................................................................25

A. C OMPLIANCE R EQUIREMENTS ............................................................................................25

B. C ERTIFICATION R EQUIREMENTS ........................................................................................25

C. P ERMIT S HIELD ...................................................................................................................26

D. M ONITORING

, R ECORDKEEPING

, AND R EPORTING R EQUIREMENTS ..................................27

E. P ROMPT D EVIATION R EPORTING ........................................................................................28

F. E MERGENCY P ROVISIONS ...................................................................................................28

G. I NSPECTION AND E NTRY .....................................................................................................29

H. F EE P AYMENT .....................................................................................................................29

I. M INOR P ERMIT M ODIFICATIONS ........................................................................................29

J. C HANGES N OT R EQUIRING P ERMIT R EVISION ...................................................................30

K. S IGNIFICANT P ERMIT M ODIFICATIONS ...............................................................................31

L. R EOPENING FOR C AUSE ......................................................................................................31

M. P ERMIT E XPIRATION AND R ENEWAL ..................................................................................31

N. S EVERABILITY C LAUSE ......................................................................................................32

O. T RANSFER OR A SSIGNMENT OF O WNERSHIP ......................................................................32

P. E MISSIONS T RADING

, M ARKETABLE P ERMITS

, E CONOMIC I NCENTIVES ...........................32 Q. N O P ROPERTY R IGHTS C ONVEYED .....................................................................................32

R. T ESTING R EQUIREMENTS ....................................................................................................33

S. S OURCE T ESTING P ROTOCOL .............................................................................................33

T. M ALFUNCTIONS ..................................................................................................................33

U. C IRCUMVENTION ................................................................................................................33

V. M OTOR V EHICLES ..............................................................................................................33

W. A NNUAL E MISSIONS I NVENTORY .......................................................................................33

X. O PEN B URNING ...................................................................................................................33

Y. M ONTANA A IR Q UALITY P ERMITS .....................................................................................33

Z. N ATIONAL E MISSION S TANDARD FOR A SBESTOS ..............................................................34OP2035-02 iii Date of Decision: 11/24/09

Effective Date: 12/25/09 AA. A SBESTOS ...........................................................................................................................34

BB. S TRATOSPHERIC O ZONE P ROTECTION

– S ERVICING OF M OTOR V EHICLE A IR C ONDITIONERS
.............................................................................................................................34

CC. S TRATOSPHERIC O ZONE P ROTECTION

– R ECYCLING AND E MISSION R EDUCTIONS ..........35

DD. E MERGENCY E PISODE P LAN ...............................................................................................35

EE. D EFINITIONS .......................................................................................................................35

APPENDIX A INSIGNIFICANT EMISSION UNITS...................................................................A-1

APPENDIX B DEFINITIONS AND ABBREVIATIONS.............................................................. B-1

APPENDIX C NOTIFICATION ADDRESSES .............................................................................C-1

APPENDIX D AIR QUALITY INSPECTOR INFORMATION ..................................................D-1

APPENDIX E CONTINUOUS EMISSION MONITORING SYSTEMS (CEMS)..................... E-1

APPENDIX F CAM PLAN – CIRCULATING FLUIDIZED BED BOILER, PARTICULATE

MATTER CONTROL............................................................................................. F-1

APPENDIX G CAM PLAN – CIRCULATING FLUIDIZED BED BOILER, SULFUR

DIOXIDE CONTROL.............................................................................................G-1

APPENDIX H MEMS........................................................................................................................H-1OP2035-02 1 Date of Decision: 11/24/09

Effective Date: 12/25/09 Terms not otherwise defined in this permit or in the Definitions and Abbrev iations Appendix of this permit have the meaning assigned to them in the referenced regulations.

SECTION I. GENERAL INFORMATION

The following general information is provided pursuant to ARM 17.8.1210(1).

Company Name: Colstrip Energy Limited Partnership (CELP)

Mailing Address : 1087 West River Street, Suite 200

City : Boise State: Idaho Zip : 83702

Plant Location: Six miles north of Colstrip on Highway 39

Responsible Official : Owen Orndorff, Vice President General Counsel Phone: (208)344-3570

Facility Contact Person: Scott Siddoway Phone: (208)344-3570

Primary SIC Code: 49

Nature of Business: Electric Energy Generation

Description of Process:

The Rosebud Power Plant is an electric generating f acility designed to burn low-British thermal unit (Btu) waste coal from mining operations east of Billings, Montana. The facility uses a circulating fluidized bed (CFB) boiler. The CFB boiler is designed to efficien tly utilize low-Btu coal while also allowing a high recovery of fuel sulfur through the injection of limestone into the fluidized bed.

Coal is delivered to this facility using covered trucks and trailers. The facility does not have means for coal storage beyond the truck hopper (80 ton capacity), and the boiler coal bunkers (1700 ton capacity). The coal is crushed in primary and secondary crushers, then conveyed directly to the boiler house coal

bunker. The crushed coal is metered to the fluidized portion of the boiler using gravimetric feeders.

Limestone is delivered to this facility in trucks and trailers and is unloaded pneumatically into a 820 ton silo. From the silo, limestone is metered to the bo iler using gravimetric feeders and a pressure pneumatic conveying system. In the boiler, the coal is burned at relatively low temperatures to minimize nitrogen oxides (NO

x ) formation. Limestone fed to the boiler acts as a reactant for removing sulfur dioxide.

Ash from the boiler is discharged as either bedash or flyash. Both types of ash are collected in separate systems and conveyed pneumatically to a common ash silo. The combined ash is unloaded periodically into a plant ash truck and transported to an on-site disposal area.OP2035-02 2 Date of Decision: 11/24/09

Effective Date: 12/25/09 SECTION II. SUMMARY OF EMISSION UNITS

The emission units regulated by this permit are the following (ARM 17.8.1211):

Emissions

Unit ID Description Pollution Control Device/Practice

EU001 Truck Transport of Coal Reas onable Precautions and Covered Haul

Trucks

EU002 Truck Unloading of Coal Baghouse

EU003 Coal Crushing and Transport Baghouse

EU004 Coal Bunker Bin Vents Baghouses

EU005 Limestone Unloading, Handling, and Stor age Fabric Filter Baghouse and Cartridge Filter

EU006 Circulating Fluidized Bed Boiler Baghouse

EU007 Flyash Conveying and Storage Baghouse

EU008 Bedash Conveying and Storage Baghouse

EU009 Ash Storage Silo Unloading Baghouse

EU010 Ash Truck Unloading Water Spray

EU011 Fugitive Emissions: Ash Disposal Area Water Spray

EU012 Fugitive Emissions: Vehicle Traffic Paving or chemical dust suppression or water spray as backupOP2035-02 3 Date of Decision: 11/24/09

Effective Date: 12/25/09 SECTION III. PERMIT CONDITIONS

The following requirements and conditions are applicab le to the facility or to specific emission units located at the facility (ARM 17.8.1211, 1212, and 1213).

A. Facility-Wide

Conditions Rule Citation Rule Description Pollutant/Parameter Limit

A.1 ARM

17.8.105 Testing Requirements Testing Requirements

-------

A.2 ARM 17.8.304(1) Visible Air Contaminants Opacity 40%

A.3 ARM 17.8.304(2) Visible Air Contaminants Opacity 20%

A.4 ARM 17.8.308(1) Particulate Matter,

Airborne Fugitive Opacity 20%

A.5 ARM 17.8.308(2) Particulate Matter,

Airborne Reasonable

Precautions -------

A.6 ARM

17.8.308 Particulate Matter,

Airborne Reasonable Precaution,

Construction 20%

A.7 ARM

17.8.309 Particulate Matter, Fuel Burning Equipment Particulate Matter E= 0.882 * H -0.1664 Or

E= 1.026 * H -0.233

A.8 ARM

17.8.310 Particulate Matter,

Industrial Processes Particulate Matter E= 4.10 * P 0.67 or E= 55 * P 0.11 - 40

A.9 ARM 17.8.322(4) Sulfur Oxide Emissions,

Sulfur in Fuel Sulfur in Fuel (liquid or solid fuels) 1 lb/MMBtu fired

A.10 ARM 17.8.322(5) Sulfur Oxide Emissions,

Sulfur in Fuel Sulfur in Fuel (gaseous) 50 gr/100 CF

A.11 ARM 17.8.324(3) Hydrocarbon Emissions,

Petroleum Products Gasoline Storage

Tanks -------

A.12 ARM

17.8.324 Hydrocarbon Emissions,

Petroleum Products 65,000 Gallon Capacity -------

A.13 ARM

17.8.324 Hydrocarbon Emissions,

Petroleum Products Oil-effluent Water Separator -------

A.14 ARM

17.8.342 NESHAPs General

Provisions SSM Plans Submittal

A.15 ARM

17.8.1212 Reporting Requirements Compliance Monitoring -------

A.16 ARM

17.8.1207 Reporting Requirements Annual Certification

-------

Conditions

A.1. Pursuant to ARM 17.8.105, any person or pers ons responsible for the emission of any air contaminant into the outdoor atmosphere shall, upon written request of the Department, provide the facilities and necessary equipment (including instruments and sensing devices) and shall conduct test, emission or ambient, for such pe riods of time as may be necessary using methods approved by the Department.OP2035-02 4 Date of Decision: 11/24/09

Effective Date: 12/25/09 Compliance demonstration frequencies that list “as required by the Department” refer to ARM 17.8.105. In addition, for such sources, complia nce with limits and conditions listing “as required by the Department” as the frequency, is verified annually using emission factors and engineering calculations by the Department’s compliance in spectors during the annual emission inventory review; in the case of Method 9 tests, compliance is monitored during the regular inspection by the compliance inspector.

A.2. Pursuant to ARM 17.8.304(1), CELP shall not cause or authorize emissions to be discharged into the outdoor atmosphere from any source installed on or before November 23, 1968, that exhibit an opacity of 40% or greater averaged over 6 con secutive minutes, unless otherwise specified by rule or in this permit.

A.3. Pursuant to ARM 17.8.304(2), CELP shall not cause or authorize emissions to be discharged into the outdoor atmosphere from any source installed af ter November 23, 1968, that exhibit an opacity of 20% or greater averaged over 6 consecutive minutes, unless otherwise specified by rule or in this permit.

A.4. Pursuant to ARM 17.8.308(1), CELP shall not cause or authorize the production, handling, transportation, or storage of any material unless reasonable precautions to control emissions of particulate matter are taken. Such emissions of airborne particulate matter from any stationary source shall not exhibit an opacity of 20% or greater averaged over 6 consecutive minutes, unless otherwise specified by rule or in this permit.

A.5. Pursuant to ARM 17.8.308(2), CELP shall not cause or authorize the use of any street, road or parking lot without taking reasonable precautions to control emissions of airborne particulate matter, unless otherwise specified by rule or in this permit.

A.6. Pursuant to ARM 17.8.308, CELP shall not operate a construction site or demolition project unless reasonable precautions are taken to control emissi ons of airborne particulate matter. Such emissions of airborne particulate matter from any stationary source shall not exhibit an opacity of 20% or greater averaged over 6 consecutive minutes, unless otherwise specified by rule or in this permit.

A.7. Pursuant to ARM 17.8.309, unless otherwise specifie d by rule or in this permit, CELP shall not cause or authorize particulate matter caused by th e combustion of fuel to be discharged from any stack or chimney into the outdoor atmosphere in excess of the maximum allowable emissions of particulate matter for existing fuel burning equi pment and new fuel burning equipment calculated using the following equations:

For existing fuel burning equipment (ins talled before November 23, 1968):

E =0.882 * H -0.1664

For new fuel burning equipment (insta lled on or after November 23, 1968):

E =1.026 * H -0.233

Where H is the heat input capacity in million BTU (MMBtu) per hour and E is the maximum allowable particulate emissions rate in pounds per MMBtu.

A.8. Pursuant to ARM 17.8.310, unless otherwise specifie d by rule or in this permit, CELP shall not cause or authorize particulate matter to be disch arged from any operation, process, or activity into the outdoor atmosphere in excess of the maximum hourly allowable emissions of particulate matter calculated using the following equations:

For process weight rates up to 30 tons per hour: E = 4.10 * P 0.67
For process weight rates in excess of 30 tons per hour: E = 55.0 * P 0.11 – 40 Where E = rate of emissions in pounds per hour an d p = process weight rate in tons per hour.OP2035-02 5 Date of Decision: 11/24/09

Effective Date: 12/25/09 A.9. Pursuant to ARM 17.8.322(4), CELP shall not burn liquid or solid fuels containing sulfur in excess of 1 pound per million BTU fired, unless otherwise specified by rule or in this permit.

A.10. Pursuant to ARM 17.8.322(5), CELP shall not burn any gaseous fuel containing sulfur compounds in excess of 50 grains per 100 cubic feet of gaseous fuel, calculated as hydrogen sulfide at standard conditions, unless otherwise specified by rule or in this permit.

A.11. Pursuant to ARM 17.8.324(3), CELP shall not load or permit the loading of gasoline into any stationary tank with a capacity of 250 gallons or more from any tank truck or trailer, except through a permanent submerged fill pipe, unless such tank is equipped with a vapor loss control device or is a pressure tank as described in AR M 17.8.324(1), unless otherwise specified by rule or in this permit.

A.12. Pursuant to ARM 17.8.324, unless otherwise specifie d by rule or in this permit, CELP shall not place, store or hold in any stationary tank, reser voir or other container of more than 65,000 gallon capacity any crude oil, gasoline or petroleum di stillate having a vapor pr essure of 2.5 pounds per square inch absolute or greater under actual storage conditions, unless such tank, reservoir or other container is a pressure tank maintaining worki ng pressure sufficient at all times to prevent hydrocarbon vapor or gas loss to the atmosphere, or is designed and equipped with a vapor loss control device, properly installed, in good working order and in operation.

A.13. Pursuant to ARM 17.8.324, unless otherwise specifie d by rule or in this permit, CELP shall not use any compartment of any single or multiple-com partment oil-effluent water separator, which compartment receives effluent water containing 200 gallons a day or more of any petroleum product from any equipment processing, refining, treating, storing or handling kerosene or other petroleum product of equal or greater volatility than kerosene, unless such compartment is equipped with a vapor loss control device, cons tructed so as to prevent emission of hydrocarbon vapors to the atmosphere, properly installed, in good working order and in operation.

A.14. Pursuant to ARM 17.8.342 and 40 CFR 63.6, CELP sh all submit to the Department a copy of any startup, shutdown, and malfunction (SSM) plan re quired under 40 CFR 63.6(e)(3) within 30 days of the effective date of this operating permit (if not previously submitted), within 30 days of the compliance date of any new National Emissi on Standard for Hazardous Air Pollutants (NESHAPs) or Maximum Achievable Control Tech nology (MACT) standard, and within 30 days of the revision of any such SSM plan, when a pplicable. The Department requests submittal of such plans in electronic form, when possible.

A.15. On or before February 15 and August 15 of each year, CELP shall submit to the Department the compliance monitoring reports required by Section V.D. These reports must contain all information required by Section V.D, as well as the information required by each individual emissions unit. For the reports due by February 15 of each year, CELP may submit a single report, provided that it contains all the inform ation required by Section V.B & V.D. Per ARM 17.8.1207,

any application form, report, or compliance certification submitted pursuant to ARM Title 17, Chapter 8, Subchapter 12 (including semiannual monitoring reports), shall contain certification by a responsible official of truth, a ccuracy and completeness. This certification and any other certificati on required under ARM Title 17, Chapter 8, Subchapter 12, shall state that, “based on information and belief formed after reasonable inqui ry, the statements and information in the document are true, accurate and complete.”OP2035-02 6 Date of Decision: 11/24/09

Effective Date: 12/25/09 A.16. By February 15 of each year, CELP shall submit to the Department the compliance certification report required by Section V.B. The annual certification report required by Section V.B must include a statement of compliance based on th e information available which identifies any observed, documented or otherwise known inst ance of noncompliance for each applicable requirement. Per ARM 17.8.1207,

any application form, report, or compliance certification submitted pursuant to ARM Title 17, Chapter 8, Subchapter 12 (including annual certifications), shall c ontain certification by a responsible official of truth, accuracy and completeness. This certification and any other certification required under ARM Title 17, Chapter 8, Subchapter 12, shall state that, “based on information and belief formed after reasonable inquiry, the statements and information in the document are true, accurate and complete.”

B. EU001 – Truck Transport of Coal

Compliance Demonstration

Condition(s) Pollutant/

Parameter Permit

Limit Method Frequency Reporting Requirements

B.1, B.3, B.4., B.5., B.7., B.8. Opacity 20%

B.2., B.3., B.4., B.5.,
B.6., B.7.,

B.8. Particulate

Matter Reasonable

Precautions Covered haul trucks and paving

or chemical dust suppressants and

water Ongoing Semiannual

Conditions

B.1. CELP shall not cause or authorize emissions to be discharged into the outdoor atmosphere from the emitting unit that exhibit opacity of 20% or greater averaged over 6 consecutive minutes (ARM 17.8.304(1)).

B.2. CELP shall not cause or authorize the production, handling transportation, or storage of any material unless reasonable precautions to control emissions of particulate matter are taken. Such emissions of airborne particulate from any stationary source shall not exhibit an opacity of 20% or greater averaged over 6 consecutive minutes (ARM 17.8.308(1)).

Compliance Demonstration

B.3. Coal haul trucks shall be covered during hauling operations (ARM 17.8.749).

B.4. All haul roads shall use either paving or ch emical dust suppression to limit excessive fugitive dust, with water as a backup measure to mainta in compliance with the limits in Section III.B.1 and III.B.2 (ARM 17.8.1213).

Recordkeeping

B.5. CELP shall maintain on site a log documenting co mpliance with Sections III.B.3 and III.B.4. With respect to Section III.B.3, the log shall refl ect any time a coal truck enters the plant site without a cover. When chemical dust suppression or water are applied to control emissions, a log including, but not limited to, the date, time, name of person completing log, a description or the area of application, and a description of what material was applied shall be maintained. The log shall be available to the Department for inspec tion and must be submitted to the Department upon request. (ARM 17.8.1212).OP2035-02 7 Date of Decision: 11/24/09

Effective Date: 12/25/09 Reporting

B.6. Any compliance source test reports must be s ubmitted in accordance with Montana Source Test Protocol and Procedure Manual (ARM 17.8.106).

B.7. The annual compliance certification required by Section V.B must contain a certification statement for the above applicable requirements (ARM 17.8.1212).

B.8. The semiannual monitoring report shall provide a summary of the log required in Section III.B.5 (ARM 17.8.1212).

C. EU002 – Truck Unloading of Coal; EU003 – Co al Crushing and Transport; EU004 – Coal

Bunker Bin Vents

Compliance Demonstration Condition(s) Pollutant/

Parameter Permit Limit

Method Frequency Reporting Requirements

Enclosed

Structure and Baghouse Ongoing Semiannual C.1., C.7., C.8., C.12., C.13., C.14., C.16., C.17.,

C.18. Opacity 20%

Method 9 As required by the Department

and Section

III.A.1 Semiannual

Enclosed

structures
and baghouses Ongoing Semiannual C.2., C.3., C.4., C.7., C.9., C.12., C.13., C.14., C.16., C.17.,

C.18. PM 10 0.005 gr/dscf (EU#2) 0.006 gr/dscf (EU#3) 0.01 gr/dscf (EU#4)

Method

201A As required by the Department

and Section

III.A.1 Semiannual

C.5., C.10, C.14., C.17.,

C.18. Stack Heights 40 feet above the ground Certification Ongoing Annual

C.6., C.11., C.15., C.17.,

C.18. 40 CFR 60, Subpart Y 40 CFR 60, Subpart Y 40 CFR 60, Subpart Y 40 CFR 60, Subpart Y Semiannual

Conditions

C.1. CELP may not cause or authorize emissions from the Truck Unloading of Coal, the Coal Crushing and Transport, and the Coal Bunker Bin Vents to be discharged into the outdoor atmosphere that exhibit an opacity of 20% or greater averag ed over 6 consecutive minutes (ARM 17.8.304(2)).

C.2. The unloading of coal shall be in an enclosed st ructure and controlled by a baghouse. Particulate matter less than 10 microns (PM 10 ) emissions from the baghouse shall not exceed 0.005 gr/dscf (ARM 17.8.752).

C.3. The coal crushing, screening, and transfer emissions are to be vented to a baghouse for particulate

control. PM 10 emissions from the baghouse shall not exceed 0.006 gr/dscf (ARM 17.8.752).OP2035-02 8 Date of Decision: 11/24/09

Effective Date: 12/25/09 C.4. The Coal Storage Bunker shall be controlled by two baghouses. Particulate emissions from each baghouse shall not exceed 0.01 gr/dscf (ARM 17.8.752).

C.5. CELP shall maintain the stacks of the coal dump baghouse and the coal crushing baghouse 40 feet above the ground (ARM 17.8.749).

C.6. CELP shall comply with all applicable standards and limitations, and the reporting, recordkeeping, and notification requirements contained in 40 CFR 60, Subpart Y (ARM 17.8.340 and 40 CFR 60, Subpart Y).

Compliance Demonstration

C.7. CELP shall use and maintain structural encl osures surrounding process equipment and operate baghouses for maintaining compliance with Sections III.C.2, III.C.3, and III.C.4 (ARM 17.8.1213).

C.8. As required by the Department and Section III. A.1, CELP shall perform a Method 9 test in

accordance with the Montana Source Test Protoc ol and Procedures Manual (ARM 17.8.106 and ARM 17.8.1213).

C.9. As required by the Department and Secti on III.A.1, CELP shall perform a Method 201A (filterable) or other Department approved test to monitor compliance with Sections III.C.2, III.C.3, and III.C.4. The test shall be performed in acco rdance with the Montana Source Test Protocol and Procedures Manual (ARM 17.8.106 and ARM 17.8.1213).

C.10. The stack height requirements for the coal dump baghouse and the coal crushing baghouse as specified in Section III.C.5 shall be accomp lished through initial certification and normal operations maintaining compliance on an ongoing basis (ARM 17.8.1213).

C.11. Compliance monitoring for the applicable requirements contained in 40 CFR 60, Subpart Y shall be accomplished as described in 40 CFR 60, Subpa rt Y (ARM 17.8.340 and 40 CFR 60, Subpart Y).

Recordkeeping

C.12. All source test recordkeeping shall be perform ed in accordance with the Montana Source Test Protocol and Procedures Manual (ARM 17.8.106). If Method 9 tests are conducted, the test reports must be maintained on-site and must be submitted to the Department upon request (ARM 17.8.1212).

C.13. CELP shall maintain on site, a log of all correctiv e actions taken and all repair and maintenance activity to the structural enclosures and baghouses. The log shall include, but is not limited to, the identification of the enclosure or baghouse, the da te of the maintenance and/or corrective action, the name(s) of repair personnel, description of the maintenance activity and the item(s) repaired or replaced. The log shall be available to the Depart ment for inspection and must be submitted to the Department upon request (ARM 17.8.1212).

C.14. CELP shall maintain on site a coal dump and crushing baghouse log documenting any stack specifications that deviate from normal operations as specified in Section III.C.10. At a minimum, the coal dumping and crushing baghouse log shall in clude the required information, the date, and the initials of the documenting personnel (ARM 17.8.1212).

C.15. CELP shall perform recordkeeping in accordance with 40 CFR 60, Subpart Y, as applicable (ARM 17.8.340 and 40 CFR 60, Subpart Y).OP2035-02 9 Date of Decision: 11/24/09

Effective Date: 12/25/09 Reporting

C.16. Any compliance source test reports must be s ubmitted in accordance with Montana Source Test Protocol and Procedure Manual (ARM 17.8.106).

C.17. The annual compliance certification required by Section V.B must contain a certification statement for the above applicable requirements (ARM 17.8.1212).

C.18. The semiannual monitoring report shall provide (ARM 17.8.1212):

a. Certification that the structural enclosures were maintained and in place during coal dumping;

b. Certification that the baghouses were maintain ed and in place during operation of equipment;

c. A summary of results of any source testing that was performed in that semiannual period;

d. A summary of the log required in Section III.C.13;

e. Certification that the stack heights meet the requirements in Section III.C.5 and a summary of any log entries noting any deviation from the normal operation with respect to stack height;

and

f. A summary of compliance requirements of 40 CFR 60, Subpart Y as applicable.

D. EU005 – Limestone Unloading, Handling, and Storage

Compliance Demonstration Condition(s) Pollutant/

Parameter Permit Limit

Method Frequency Reporting Requirements

Use and

maintenance of a baghouse Ongoing Semiannual D.1., D.3., D.4., D.6., D.7., D.8., D.9., D.10. Opacity 20% Method 9 As required by the Department and

Section III.A.1 Semiannual

Use and

maintenance of a baghouse Ongoing Semiannual D.2., D.3., D.5., D.6., D.7., D.8., D.9., D.10. Particulate

matter 0.01 gr/dscf

Method 201A As required by the Department and

Section III.A.1 Semiannual

Conditions

D.1. CELP may not cause or authorize emissions to be discharged into the outdoor atmosphere from any source that exhibit an opacity of 20% or greater averaged over 6 consecutive minutes (ARM 17.8.304).

D.2. Limestone truck unloading, handling, and storage sh all be controlled by a baghouse. Particulate emissions from the baghouse shall not exceed 0.01 gr/dscf (ARM 17.8.752).OP2035-02 10 Date of Decision: 11/24/09

Effective Date: 12/25/09 Compliance Demonstration

D.3. As required by the Department and Section III. A.1, CELP shall perform a Method 9 test to monitor compliance with the permit limit in Secti on III.D.1. The testing shall be performed in

accordance with the Montana Source Test Protoc ol and Procedures Manual, or another method approved by the Department (A RM 17.8.106 and ARM 17.8.1213).

D.4. CELP shall use and maintain structural encl osures surrounding process equipment and operate baghouses for maintaining compliance with Section III.D.2 (ARM 17.8.1213).

D.5. As required by the Department and Secti on III.A.1, CELP shall perform a Method 201A (filterable) test to monitor compliance with the permit limit in Section III.D.2. The testing shall be performed in accordance with the Montana Sour ce Test Protocol and Procedures Manual, or another method approved by the Depart ment (ARM 17.8.106 and ARM 17.8.1213).

Recordkeeping

D.6. All source test recordkeeping shall be perform ed in accordance with the Montana Source Test Protocol and Procedures Manual (A RM 17.8.106 and ARM 17.8.1212).

D.7. CELP shall maintain on site, a log of all correctiv e actions taken and all repair and maintenance activity to the structural enclosures and baghouses. The log shall include, but is not limited to, the identification of the enclosure or baghouse, the da te of the maintenance and/or corrective action, the name(s) of repair personnel, description of the maintenance activity and the item(s) repaired or replaced. The log shall be available to the Depart ment for inspection and must be submitted to the Department upon request (ARM 17.8.1212).

Reporting

D.8. Any compliance source test reports must be s ubmitted in accordance with Montana Source Test Protocol and Procedure Manual (ARM 17.8.106).

D.9. The annual compliance certification required by Section V.B must contain a certification statement for the above applicable requirements (ARM 17.8.1212).

D.10. The semiannual monitoring report shall provide (ARM 17.8.1212):

a. A summary of results of the last source testing that was performed in that semiannual period;

and

b. Certification that the log required in Section III.D.7 was maintained.

E. EU006 – Circulating Fluidized Bed Boiler

Compliance Demonstration

Condition(s) Pollutant/

Parameter Permit Limit

Method Frequency Reporting Requirements

COMS Ongoing Quarterly E.1, E.14, E.15, E.30, E.39, E.40, E.42, E.43 Opacity 20%

Method 9 As required by the Department

and Section

III.A.1 Semiannual

E.2, E.16, E.30, E.39, E.40, E.42,

E.43 PM 10 26.28 tons/year 144.0 lbs/day

6.0 lbs/hour Method 201A Annual SemiannualOP2035-02 11 Date of Decision: 11/24/09

Effective Date: 12/25/09 Compliance Demonstration

E.3, E.30, E.39, E.40, E.42, E.43 Particulate

Matter 0.03 lb/MMBtu heat input and 99%

reduction Method 19 and

Method 5 as specified in 40 CFR 60 Subpart

Da Annual Semiannual

CEMS Ongoing Quarterly E.2, E.18, E.30, E.39, E.40, E.42,

E.43 SO 2 1,840 tons/year 5.04 tons/day 432 lbs/hour (3-hour) 574 lbs/hour (1-hour) Method 6 As required by the Department

and Section

III.A.1 Semiannual

E.4, E.17, E.25, E.40, E.42, E.43 SO 2 1.2 lb/MMBtu heat input and 90%

reduction or 70%

reduction with <0.60

lb/MMBtu CEMS Ongoing Quarterly

CEMS Ongoing Quarterly E.2, E.19, E.30, E.39, E.40, E.42,

E.43 NO

x 1,435 tons/year 7,864 lbs/day

328 lbs/hour Method 7 As required by the Department

and Section

III.A.1 Semiannual

CEMS Ongoing Quarterly E.2, E.19, E.30, E.39, E.40, E.42,

E.43 CO 232 tons/year 1,272 lbs/day

53 lbs/hour Method 3B As required by the Department

and Section

III.A.1 Semiannual

E.2, E.21, E.31, E.40, E.42, E.43 Emission

Control Equipment Operation and

maintenance of a baghouse Operation and

maintenance of a baghouse Ongoing Semiannual

E.5, E.22, E.40, E.42,

E.43 Stack Heights 200 feet Reporting Annual Annual

E.6, E.23, E.33, E.40, E.42, E.43 Fuel Burning More than 25% by weight coal refuse on

an annual basis Reporting Annual Annual

E.7, E.24, E.33, E.40, E.42, E.43 40 CFR 60, Subpart Da 40 CFR 60, Subpart

Da 40 CFR 60, Subpart Da 40 CFR 60, Subpart Da Semiannual

E.8, E.25, E.34, E.40, E.42, E.43 PM CAM Plan ARM 17.8.1506 Provisions from CAM Plan, Appendix F Ongoing Semiannual

E.9, E.26, E.35, E.40, E.42, E.43 SO 2 CAM Plan ARM 17.8.1506 Provisions from CAM Plan, Appendix G Ongoing Semiannual

E.10, E.27, E.36, E.40, E.41, E.42,

E.43 Mercury

Emissions 0.9 lb/TBtu MEMS Ongoing Semiannual

E.11, E.12, E.28, E.37, E.40, E.41, E.42, E.43 Mercury

Emission

Control Equipment Mercury

oxidizer/sorbent handling system Log Ongoing Semiannual

E.13, E.29, E.38, E.40, E.42, E.43 40 CFR Part 75 40 CFR Part 75 40 CFR Part 75 Ongoing SemiannualOP2035-02 12 Date of Decision: 11/24/09

Effective Date: 12/25/09 Conditions

E.1. CELP may not cause or authorize emissions to be discharged into the outdoor atmosphere from any sources installed after November 23, 1968, that exhibit an opacity of 20% or greater averaged over 6 consecutive minutes (ARM 17.8.304 and ARM 17.8.749).

E.2. CELP shall operate and maintain a baghouse on the CFB boiler. The CFB boiler’s emissions for the pollutants listed below shall not exceed the following for the times identified (ARM 17.8.752).

Pollutant Annual Daily 3-Hour 1-Hour

SO 2 1,840 tons 5.04 tons 432 lbs/hr 574 lbs

NO

x 1,435 tons 7,864 lbs

----- 328 lbs

CO 232 tons 1,272 lbs

----- 53 lbs

PM 10 26.28 tons 144.0 lbs

----- 6.0 lbs

E.3. CELP shall not cause to be discharged into the atmosphere from any 40 CFR 60, Subpart Da affected facility any gases which contain pa rticulate matter in excess of (ARM 17.8.749):

a. 0.03 lb/MMBtu heat input derived from the combustion of solid, liquid, or gaseous fuel;

and

b. 1% of the potential combustion concentrati on (99% reduction) when combusting solid fuel per 40 CFR 60.42a.

E.4. CELP shall not cause to be discharged into the atmosphere from any 40 CFR 60, Subpart Da affected facility any gases whic h contain sulfur dioxide (SO 2 ) in excess of (ARM 17.8.749):

a. 1.20 lb/MMBtu heat input and 10% of the potential combustion concentration (90% reduction), or

b. 30 percent of the potential combustion concen tration (70% reduction), when emissions are less than 0.60 lb/MMBtu heat input per 40 CFR Part 60.43a.

E.5. The exhaust from the CFB boiler shall be discharged from a two hundred foot stack (ARM 17.8.749).

E.6. CELP shall burn fuel containing more than 25%, by weight, coal refuse on an annual basis (ARM 17.8.749).

E.7. CELP shall comply with all applicable standards and limitations, and the reporting, recordkeeping, and notification requirements contained in 40 CF R 60, Subpart Da (ARM 17.8.340 and 40CFR60, Subpart Da).

E.8. CELP shall provide a reasonable assurance of comp liance with emission limitations or standards for the anticipated range of operations at the Circulating Fluidized Bed Boiler for PM (ARM 17.8.1504).

E.9. CELP shall provide a reasonable assurance of comp liance with emission limitations or standards for the anticipated range of operations at the Circulating Fluidized Bed Boiler for SO 2 (ARM 17.8.1504).OP2035-02 13 Date of Decision: 11/24/09

Effective Date: 12/25/09 E.10. Beginning January 1, 2010, emissions of mercur y from the boiler shall not exceed 0.9 pounds per trillion British thermal units (lb/TBtu), calculated as a rolling 12-month average (ARM 17.8.771).

E.11. CELP shall install a mercury control system that oxidizes and sorbs emission of mercury. CELP shall implement the operation and maintenance of th e mercury control system on or before January 1, 2010 (ARM 17.8.771).

E.12. CELP shall operate and maintain the mercury oxid izer/sorbent handling system, including the bin vent filter system, to provide the maximum air pollution control for that which the system was designed (ARM 17.8.749).

E.13. CELP shall comply with all applicable standard s and limitations, and the applicable operating, reporting, recordkeeping, and notification require ments contained in 40 CFR Part 75 (40 CFR Part 75, ARM 17.8.771, and ARM 17.8.749).

Compliance Demonstration

E.14. As required by the Department and Section III. A.1, CELP shall perform a Method 9 test to monitor compliance with the opacity limit in Section III.E.1. The testing shall be performed in

accordance with the Montana Source Test Protoc ol and Procedures Manual or another method approved by the Department (A RM 17.8.106 and ARM 17.8.1213).

E.15. CELP shall operate the continuous opacity m onitor (COM) to monitor compliance with the opacity limitation in Section III.E.1. The opera tion and maintenance shall be performed in accordance with the Opacity CEMS Appendix E of this permit (ARM 17.8.749 and ARM 17.8.1213).

E.16. CELP shall perform a Method 201A (filterable) or another Department approved test method annually to monitor compliance with the PM 10 limit in Section III.E.2. The test methods and procedures shall be conducted in accordance w ith the Montana Source Test Protocol and Procedures Manual (ARM 17.8.106).

E.17. To monitor compliance with Section III.E.4 ., CELP shall follow 40 CFR 60.48a, including Reference Method 19 and using an F-factor of 10,024 dscf/MMBtu (ARM 17.8.749; 40 CFR 60, Subpart Da; 40 CFR 60, Appendix A).

E.18. As required by the Department and Section III. A.1, CELP shall perform a Method 6 or other Department approved test method to monitor compliance with the SO 2 emissions limit in Section III.E.2 (ARM 17.8.1213).

E.19. As required by the Department and Section III. A.1, CELP shall perform a Method 7 or other Department approved test method to monitor compliance with the NO

x emission limit in Section III.E.2 (ARM 17.8.1213).

E.20. As required by the Department and Section III.A. 1, CELP shall perform a Method 3B or other Department approved test method to monitor co mpliance with the CO emission limit in Section III.E.2 (ARM 17.8.1213).

E.21. CELP shall operate and maintain a baghouse to de monstrate compliance with the requirement in Section III.E.2 (ARM 17.8.1213).

E.22. CELP shall verify that the CFB boiler stack hei ght was maintained at 200 feet as specified in Section III.E.5 (ARM 17.8.1213).OP2035-02 14 Date of Decision: 11/24/09

Effective Date: 12/25/09 E.23. CELP shall report annually the amount of coal c onsumed (tons) and the amount of coal refuse consumed (tons) at the facility over th e previous 12 months (ARM 17.8.1213).

E.24. Compliance monitoring for the applicable requirements contained in 40 CFR 60, Subpart Da shall be accomplished as described in 40 CFR 60, Subpa rt Da (ARM 17.8.340 and 40 CFR 60, Subpart Da).

E.25. CELP shall monitor compliance by following the Compliance Assurance Monitoring (CAM) Plan for PM (Appendix F). The CAM Plan, written by CELP in accordance with ARM 17.8.1504 is summarized in Appendix F and is available in full upon request by the Department or the facility (ARM 17.8.1503 and ARM 17.8.1213).

E.26. CELP shall monitor compliance by following the Compliance Assurance Monitoring (CAM) Plan

for SO 2 (Appendix G). The CAM Plan, written by CELP in accordance with ARM 17.8.1504 is summarized in Appendix G and is available in full upon request by the Department or the facility (ARM 17.8.1503 and ARM 17.8.1213).

E.27. In order to monitor compliance with the mercur y emission limit in III.B.8, an MEMS shall be installed, certified, and operating on the boiler st ack outlet on or before January 1, 2010. The MEMS shall also comply with the applicable pr ovisions of 40 CFR Part 75 and the requirements included in Appendix H (ARM 17.8.1213).

E.28. Monitoring compliance with the requirements fo r the installation and operation of mercury oxidizer/sorbent handling system shall be acco mplished through recordkeeping (ARM 17.8.1213).

E.29. Compliance monitoring for the operating, reporting, recordkeeping, and notification requirements contained in 40 CFR Part 75 shall be accomplishe d as described in 40 CFR 75 (ARM 17.8.340 and 40 CFR 75).

Recordkeeping

E.30. All source test recordkeeping shall be perform ed in accordance with the Montana Source Test Protocol and Procedures Manual (A RM 17.8.106 and ARM 17.8.1212).

E.31. CELP shall maintain on site a log of the aver age daily pressure differential across the baghouse when the baghouse is operating. The log shall incl ude, but is not limited to, the date and time of the measurement and the pressure differential readi ng. In addition, CELP shall maintain a log of corrective actions and all repair and maintenance activity to the baghouse. The log shall include, but is not limited to, the identification information for the baghouse, the date of the maintenance and/or corrective action, the name(s) repair personnel, description of the maintenance activity and the item(s) repaired or replaced. The logs shall be available to the Department for inspection and must be submitted to the Depart ment upon request (ARM 17.8.1212).

E.32. CELP shall maintain a log on site of the weight percent sulfur and heating value (BTU/lb) of the waste coal fuel (ARM 17.8.1212).

E.33. CELP shall maintain a log on site of the amount of coal consumed (tons) and the amount of coal refuse consumed (tons) at the facility (ARM 17.8.1212).

E.34. CELP shall prepare and keep data in accordance with 40 CFR Part 64 and the CAM Plan for PM, Appendix F of this permit (ARM 17.8.1212 and 40 CFR Part 64).

E.35. CELP shall prepare and keep data in accordan ce with 40 CFR Part 64 and the CAM Plan for SO 2 , Appendix G of this permit (ARM 17.8.1212 and 40 CFR Part 64).OP2035-02 15 Date of Decision: 11/24/09

Effective Date: 12/25/09 E.36. Records shall be prepared and data kept in accordance with 40 CFR Part 75 and the MEMS Appendix H of this permit (ARM 17.8.1212 and 40 CFR 75).

E.37. For any time after January 1, 2010, CELP shall reco rd in a log the date, time, and duration of any incident where the mercury oxidizer/sorbent hand ling system is not maintained or operational (ARM 17.8.1212).

E.38. CELP shall perform recordkeeping in accordance with 40 CFR Part 75 (ARM 17.8.1212 and 40 CFR Part 75).

Reporting

E.39. Any compliance source test reports must be s ubmitted in accordance with the Montana Source

Test Protocol and Procedures Manua l (ARM 17.8.1212 and ARM 17.8.106).

E.40. Excess emission reports and the results of inspecti ons and audits, as required in Appendix E, shall be submitted quarterly to the Departme nt (ARM 17.8.1212 and ARM 17.8.106).

E.41. The owner or operator of any mercury-emitti ng generating unit shall report to the Department within 30 days after the end of each calendar quarter, as described in Appendix H (ARM 17.8.749):

a. The monthly average lb/TBtu mercury emission rate, for each month of the quarter;

b. The 12-month rolling average lb/TBtu emission rate for each month of the reporting quarter;

and

c. Number of operating hours that the MEMS was unavailable or not operating within quality assurance limits (monitor downtime).

The first quarterly report must be received by the Department by April 30, 2010, but shall not include 12-month rolling averages. The first quarterly report to include 12-month rolling averages must be received by the Department by January 30, 2011 (ARM 17.8.749).

E.42. The annual compliance certification required by Section V.B must contain a certification statement for the above applicable requirements (ARM 17.8.1212).

E.43. The semiannual monitoring report shall provide (ARM 17.8.1212):

a. A summary of results of any source testing that was performed during that semiannual period;

b. Certification that the baghouse was maintained and in place during operation of equipment;

c. Certification that the logs required in Sections III.E.24, III.E.25, and III.E.26 were maintained;

d. A summary of compliance with requirements of 40 CFR 60, Subpart Da as applicable;

e. Certification of compliance with 40 CFR Part 64 (CAM), Appendix F;

f. Certification of compliance with 40 CF R Part 64 (CAM), Appendix G; and,

g. A summary of the log when the mercury oxidizer/sorbent handling system was not maintained or operational.OP2035-02 16 Date of Decision: 11/24/09

Effective Date: 12/25/09 F. EU007 – Flyash Conveying and Storage; EU008 – Bedash Conveying and Storage; EU009 – Ash Storage Silo Unloading

Compliance Demonstration Condition(s) Pollutant/

Parameter Permit Limit

Method Frequency Reporting Requirement

Use and

maintenance of baghouse Whenever

process equipment is operating Semiannual F.1., F.6., F.8., F.11., F.12., F.13., F.14., F.15.,

F.16. Opacity 20%

Method 9 As required by the Department

and Section

III.A.1 Semiannual

Use and

maintenance of baghouses Whenever

process equipment is operating Semiannual F.2., F.3.,
F.6., F.9., F.11., F.12., F.13., F.14., F.15., F.16. PM 10 0.004 gr/sdcf (EU007 and EU008)

Method 201A As required by the Department

and Section

III.A.1 Semiannual

Use and

maintenance of baghouses Whenever

process equipment is operating Semiannual F.4., F.6.,
F.7., F.9., F.11., F.12., F.14., F.15.,

F.16. PM 10 0.01 gr/dscf (EU009)

Method 201A As required by the Department

and Section

III.A.1 Semiannual

F.5., F.10., F.15., F.16. Stack Heights 22 feet above the ground Certification Ongoing Annual

Conditions

F.1. CELP shall not cause or authorize emissions to be discharged into the outdoor atmosphere from any source that exhibit an opacity of 20% or greater averaged over 6 consecutive minutes (ARM 17.8.304).

F.2. Flyash conveying and storage shall be controlled by a baghouse. PM 10 emissions from the baghouse shall not exceed 0.004 gr/dscf (ARM 17.8.752).

F.3. Bedash conveying and storage shall be controlled by a baghouse. PM 10 emissions from the baghouse shall not exceed 0.004 gr/dscf (ARM 17.8.752).

F.4. Ash storage silo unloading shall be controlle d by a baghouse and covered haul trucks. PM 10 emissions from the baghouse shall not exceed 0.01 gr/dscf (ARM 17.8.752).

F.5. CELP shall maintain the stacks on the flyash and bedash storage baghouse/cartridge 22 feet above the ground (ARM 17.8.749).OP2035-02 17 Date of Decision: 11/24/09

Effective Date: 12/25/09 Compliance Demonstration

F.6. CELP shall use and maintain a baghouse to mon itor compliance with the 20% opacity limit in Section III.F.1 and the particulate limits in Section III.F.2., III.F.3, a nd III.F.4 (ARM 17.8.1213).

F.7. CELP shall use covered haul trucks for Ash stor age silo unloading to monitor compliance with Section III.F.4 (ARM 17.8.1213).

F.8. As required by the Department and Section III. A.1, CELP shall perform a Method 9 test in

accordance with the Montana Source Test Protocol and Procedures Manual to monitor compliance with Section III.F.1 (ARM 17.8.106 and ARM 17.8.1213).

F.9. As required by the Department and Secti on III.A.1, CELP shall perform a Method 201A (filterable) in accordance with the Montana S ource Test Protocol and Procedures Manual to monitor compliance with Section III.F.2, Section III.F.3, and Section III.F.4 (ARM 17.8.106 and ARM 17.8.1213).

F.10. The stack height requirements for the flyash and bedash storage baghouse/cartridge specified in Section III.F.5 shall be accomplished through initial certification and normal operations maintaining compliance on an ongoing basis (ARM 17.8.1213).

Recordkeeping

F.11. All source test recordkeeping shall be perform ed in accordance with the Montana Source Test Protocol and Procedures Manual (ARM 17.8.106).

F.12. CELP shall maintain a log of all repair and main tenance activity to any baghouse. The log must include, but is not limited to, the date, time, and action(s) taken. The maintenance log shall be maintained as a permanent business record for at l east five years following the activity. The log shall be available to the Department for inspec tion and must be submitted to the Department upon request (ARM 17.8.1212).

F.13. CELP shall maintain on site a flyash and bed ash storage baghouse/cartridge log documenting any stack specifications that deviate from normal operations as specified in Section III.F.10. At a minimum, the flyash and bedash storage baghouse/cartridge log shall include the required information, the date, and the initials of the documenting personnel (ARM 17.8.1212).

Reporting

F.14. Any compliance source test reports must be s ubmitted in accordance with Montana Source Test Protocol and Procedure Manual (ARM 17.8.106).

F.15. The annual compliance certification required by S ection V.B must contain a certification statement for the above applicable requirements (ARM 17.8.1212).

F.16. The semiannual monitoring report shall provide (ARM 17.8.1212):

a. A summary of any source testing that was performed during the last semiannual period;

b. Certification that the stack heights are maintained as required in Section III.F.5; and

c. Certification that the log required in Section III.F.13 was maintained.OP2035-02 18 Date of Decision: 11/24/09

Effective Date: 12/25/09 G. EU010 - Ash Truck Unloading

Compliance Demonstration Conditions Pollutant/Parameter Permit

Limit Method Frequency Reporting Requirement

G.1., G.2., G.3., G.4., G.5., G.6.,

G.7. Opacity 20% Visual Survey Weekly Semiannual

Conditions

G.1. CELP shall not cause or authorize emissions to be discharged into the outdoor atmosphere from any source that exhibit an opacity of 20% or greater averaged over 6 consecutive minutes (ARM 17.8.304).

Compliance Demonstration

G.2. Once weekly during daylight hours, CELP shall visually survey the Ash Truck Unloading for any sources of excessive emissions. For the purpose of th is survey, excessive emissions are considered to be any visible emissions, which meet or exceed 15% opacity. The person conducting the survey

does not have to be an EPA Method 9 certified obser ver. However, the individual must have been certified as a Method 9 certified observer. However, the individual must have been certified as a Method 9 observer within the previous 2 years of the visual survey being performed. If sources of excessive emissions are identified, CELP shall i mmediately conduct a Method 9 or take corrective

action to contain or minimize the source of emissi ons. If corrective actions are taken, then CELP shall immediately conduct a subsequent visual survey to monitor compliance. The person conducting the visual survey shall record the r esults of the survey in a log, including any corrective action taken. Conducting a visual su rvey does not relieve CELP of a liability for a

violation determined usi ng Method 9 (ARM 17.8.1213).

If visual surveys are not conducted once per calendar week during the reporting period, as specified above, CELP shall perform a semiannual Method 9 source test for the visible emissions

from the affected unit. Method 9 source tests mu st be performed in acco rdance with the Montana Source Test Protocol and Procedures Manual, except that prior notification of the test is not required. Each observation period must be a minimum of 6 minutes unless any one reading meets or exceeds the applicable limit, then the observation period must be a minimum of 20 minutes or

until a violation of the standard has been documen ted, whichever is a shorter period of time (ARM 17.8.1213).

Recordkeeping

G.3. All source test recordkeeping shall be perform ed in accordance with the Montana Source Test Protocol and Procedures Manual (ARM 17.8.106).

G.4. CELP shall maintain a log recording the results of th e visual surveys. The log shall include but is not limited to the date, time, observer(s), observe r(s)’s location, the area being surveyed, and the results of the visual survey. If any preventative or corrective action is required, the time, date, and a description of the action taken must be included in the log. The log shall be available to the Department for inspection and must be subm itted to the Department upon request (ARM 17.8.1212).OP2035-02 19 Date of Decision: 11/24/09

Effective Date: 12/25/09 Reporting

G.5. Any compliance source test reports must be s ubmitted in accordance with Montana Source Test Protocol and Procedure Manual (ARM 17.8.106).

G.6. The annual compliance certification required by S ection V.B must contain a certification statement for the above applicable requirements (ARM 17.8.1212).

G.7. The semiannual monitoring report shall provide (ARM 17.8.1212):

a. A summary of any source testing that was performed during that semiannual period; and

b. Certification that the log was maintained as required in Section III.G.4.

H. EU011 – Fugitive Emissions: Ash Disposal Area

Compliance Demonstration Conditions Pollutant/Parameter Permit

Limit Method Frequency Reporting Requirement
Visual Survey Weekly Semiannual H.1., H.2., H.4., H.6., H.7., H.8., H.9., H.10.,

H.11. Opacity 20%

Use of Water Spray As Needed Semiannual

H.3., H.5., H.8., H.9., H.10., H.11. Disposal Site Inactivity Mitigative

Measures Determined by the Department As Required Annual

Conditions

H.1. CELP shall not cause or authorize the production, handling transportation, or storage of any material unless reasonable precautions to control emissions of particulate matter are taken. Such emissions of airborne particulate from any stationary source shall not exhibit an opacity of 20% or greater averaged over 6 consecutive minutes (ARM 17.8.308(1)).

H.2. CELP shall use water spray to control fugitive emissions of particulate matter from the ash disposal area. Ash at the disposal site sha ll not be handled in such a manner as to create emissions in excess of 20% opacity (ARM 17.8.749).

H.3. If a portion of the ash disposal area is inactive and the Department determines it to be necessary, CELP shall provide mitigative measures, including, but not limited to, revegetation, to control wind-blown emissions from the area. The Department shall determine the necessity of the control measures above on the basis of Departme nt observation, results of ambient air quality monitoring, complaints, or any combination of the above (ARM 17.8.749).

Compliance Demonstration

H.4. Once weekly during daylight hours, CELP shall vi sually survey the Ash Disposal Area for any sources of excessive emissions. For the purpose of this survey, excessive emissions are considered to be any visible emissions, wh ich meet or exceed 15% opacity. The person conducting the survey does not have to be an EPA Method 9 certified observer. However, the

individual must have been certified as a Method 9 certified observer. However, the individual must have been certified as a Method 9 observer within the previous 2 years of the visual surveyOP2035-02 20 Date of Decision: 11/24/09

Effective Date: 12/25/09 being performed. If sources of excessive emissions are identified, CELP shall immediately

conduct a Method 9 or take corrective action to c ontain or minimize the source of emissions. If corrective actions are taken, then CELP shall imme diately conduct a subsequent visual survey to monitor compliance. The person conducting the vi sual survey shall record the results of the survey in a log, including any corrective action taken. Conducting a visual survey does not relieve CELP of a liability for a violation determined using Method 9.

If visual surveys are not conducted once per calendar week during the reporting period, as specified above, CELP shall perform a semiannual Method 9 source test for the visible emissions

from the affected unit. Method 9 source tests mu st be performed in acco rdance with the Montana Source Test Protocol and Procedures Manual, except that prior notification of the test is not required. Each observation period must be a minimum of 6 minutes unless any one reading meets or exceeds the applicable limit, then the observation period must be a minimum of 20 minutes or

until a violation of the standard has been docum ented, whichever is a shorter period of time (ARM 17.8.1213).

H.5. If any mitigative measures have been required, CELP shall verify the mitigative measures have been permformed (ARM 17.8.1213).

Recordkeeping

H.6. All source test recordkeeping shall be perform ed in accordance with the Montana Source Test Protocol and Procedures Manual (ARM 17.8.106).

H.7. CELP shall maintain a log recording the results of th e visual surveys. The log shall include but is not limited to the date, time, observer(s)’s location, the area being surveyed, and the results of the visual survey(s). If any corrective action is required the time, date, and a description of the action taken must be included in the log. The log shall be available to the Department for inspection and must be submitted to the Depart ment upon request (ARM 17.8.1212).

H.8. CELP shall maintain a log on site of any m itigative measures taken, if required (ARM 17.8.1212).

Reporting

H.9. Any compliance source test reports must be s ubmitted in accordance with Montana Source Test Protocol and Procedure Manual (ARM 17.8.106).

H.10. The annual compliance certification required by Section V.B must contain a certification statement for the above applicable requirements (ARM 17.8.1212).

H.11. The semiannual monitoring report shall provide (ARM 17.8.1212):

a. A summary of any source testing that w as performed during that semiannual period;

b. Certification that the log was maintain ed as required in Section III.H.7; and

c. Certification that the log, if required, wa s maintained as required in Section III.H.8.OP2035-02 21 Date of Decision: 11/24/09

Effective Date: 12/25/09 I. EU012 – Fugitive Emissions: Vehicle Traffic

Compliance Demonstration Conditions Pollutant/Parameter Permit Limit

Method Frequency Reporting Requirement

I.1., I.3., I.5., I.6., I.7., I.8.,

I.9. Opacity 20% Visual Survey Weekly Semiannual

I.2., I.4., I.7., I.8., I.9. Airborne Particulate

Matter Reasonable

Precautions Water and/or

chemical

suppressants As Needed Semiannual

Conditions

I.1. CELP shall not cause or authorize the production, handling transportation, or storage of any material unless reasonable precautions to control emissions of particulate matter are taken. Such emissions of airborne particulate from any stationary source shall not exhibit an opacity of 20% or greater averaged over 6 consecutive minutes (ARM 17.8.308(1)).

I.2. CELP shall not cause or authorize the use of any street, road, or parking lot without taking reasonable precautions to control emissions of ai rborne particulate matter (ARM 17.8.308(2)).

Compliance Demonstration

I.3. Once weekly during daylight hours, CELP shall vi sually survey Vehicle Traffic for any sources of excessive emissions. For the purpose of this su rvey, excessive emissions are considered to be any visible emissions, which meet or exceed 15% opacity. The person conducting the survey

does not have to be an EPA Method 9 certified ob server. However, the individual must have

been certified as a Method 9 certified observer. Ho wever, the individual must have been certified as a Method 9 observer within the previous 2 years of the visual survey being performed. If sources of excessive emissions are identified, CELP shall immediately conduct a Method 9 or

take corrective action to contain or minimize the source of emissions. If corrective actions are taken, then CELP shall immediately conduct a subse quent visual survey to monitor compliance. The person conducting the visual survey shall record the results of the survey in a log, including any corrective action taken. Conducting a visual survey does not relieve CELP of a liability for a violation determined using Method 9.

If visual surveys are not conducted once per calendar week during the reporting period, as specified above, CELP shall perform a semiannual Method 9 source test for the visible emissions

from the affected unit. Method 9 source tests mu st be performed in acco rdance with the Montana Source Test Protocol and Procedures Manual, except that prior notification of the test is not required. Each observation period must be a minimum of six minutes unless any one reading meets or exceeds the applicable limit, then the observation period must be a minimum of 20

minutes or until a violation of the standard has been documented, whichever is a shorter period of time (ARM 17.8.1213).

I.4. CELP shall treat all unpaved portions of the haul ro ads, access roads, parking lots, or the general plant area with water and/or chemical dust s uppressant as necessary to maintain compliance with the reasonable precautions limitation (ARM 17.8.1213).

Recordkeeping

I.5. All source test recordkeeping shall be perform ed in accordance with the Montana Source Test Protocol and Procedures Manual (ARM 17.8.106).OP2035-02 22 Date of Decision: 11/24/09

Effective Date: 12/25/09 I.6. CELP shall maintain a log recording the results of th e visual surveys. The log shall include but is not limited to the date, time, observer(s)’s location, the area being surveyed, and the results of the visual survey(s). If any corrective action is requi red the time, date, and a description of the action taken must be included in the log. The log shall be available to the Department for inspection and must be submitted to the Depart ment upon request (ARM 17.8.1212).

Reporting

I.7. Any compliance source test reports must be s ubmitted in accordance with Montana Source Test Protocol and Procedure Manual (ARM 17.8.106).

I.8. The annual compliance certification required by Section V.B must contain a certification statement for the above applicable requirements (ARM 17.8.1212).

I.9. The semiannual monitoring report shall provide (ARM 17.8.1212):

a. A summary of any source testing that was performed during that semiannual period; and

b. Certification that the log was maintained as required in Section III.I.6.OP2035-02 23 Date of Decision: 11/24/09

Effective Date: 12/25/09 SECTION IV. NON-APPLICABLE REQUIREMENTS

Air Quality Administrative Rules of Montana (ARM) a nd Federal Regulations identified as not applicable to the facility or to a specific emissions unit at th e time of the permit issuance are listed below (ARM 17.8.1214). The following list does not preclude the n eed to comply with any new requirements that may become applicable during the permit term.

A. Facility-Wide

The following table contains non-applicable require ments which are administrated by the Air Resources Management Bureau of the Department of Environmental Quality.

Rule Citation Reason

40 CFR 60.18 The control devices specified by this rule are not applicable to this facility.
40 CFR 60, Subparts C, Ca, Cb, Cc, Cd 40 CFR 60, Subparts D, Db, Dc 40 CFR 60, Subparts E-J 40 CFR 60, Subparts K, Ka, Kb 40 CFR 60, Subparts L-X 40 CFR 60, Subpart Z 40 CFR 60, Subparts AA-EE 40 CFR 60, Subparts GG-HH 40 CFR 60, Subparts KK-NN 40 CFR 60, Subparts PP-XX 40 CFR 60, Subparts AAA-BBB 40 CFR 60, Subparts DDD 40 CFR 60, Subparts FFF-LLL 40 CFR 60, Subparts NNN-WWW 40 CFR 61, Subparts B-F 40 CFR 61, Subparts H-L 40 CFR 61, Subparts N-R 40 CFR 60, Subpart T 40 CFR 61, Subparts V-W 40 CFR 61, Subpart Y 40 CFR 61, Subpart BB 40 CFR 61, Subpart FF40 CFR 63 Subparts F-I, L, M-O, Q-U, W-Y, CCEE, GG, II-RR, EEE, JJJ

40 CFR 68 40 CFR 82 Subparts A-E, G-H These requirements are not applicable because the facility is not an affected source as defined in these regulations.

40 CFR 72

40 CFR 73

40 CFR 75

40 CFR 76

40 CFR 77

40 CFR 78 These requirements are not applicable because the facility is not an affected source as defined by the acid rain regulations.

ARM 17.8.316

ARM 17.8.320

ARM 17.8.321

ARM 17.8.323

ARM 17.8.324

ARM 17.8.326

ARM 17.8.331

ARM 17.8.332

ARM 17.8.333

ARM 17.8.334 These rules are not applicable because the facility is not listed in the source category cited

in the rule.OP2035-02 24 Date of Decision: 11/24/09

Effective Date: 12/25/09 B. Emission Units

The permit application identified applicable requireme nts: non-applicable requirements for individual or specific emission units were not listed. The Depart ment has listed all non-applicable requirements in Section IV.A, these requirements relate to each specific unit, as well as facility wide.OP2035-02 25 Date of Decision: 11/24/09

Effective Date: 12/25/09 SECTION V. GENERAL PERMIT CONDITIONS

A. Compliance Requirements ARM 17.8, Subchapter 12, Operating Permit Program §1210(2)(a)-(c)& (e), §1206(6)(c)&(b)

1. The permittee must comply with all conditions of the permit. Any noncompliance with the terms or conditions of the permit constitutes a violation of the Montana Clean Air Act, and may result in enforcement action, permit modification, revocation and reissuance, or termination, or denial of a permit renewal application under ARM Title 17, Chapter 8, Subchapter 12.

2. The filing of a request by the permittee for a pe rmit modification, revocation and reissuance, or termination, or of a notification of planned ch anges or anticipated noncompliance does not stay any permit condition.

3. It shall not be a defense for a permittee in an enforcement action that it would have been necessary to halt or reduce the permitted activity in order to maintain compliance with the conditions of the permit. If appropriate, this factor may be considered as a mitigating factor in assessing a penalty for noncompliance with an applicable requirement if the source demonstrates that both the health, safety or environmental impacts of halting or reducing operations would be more serious than the impa cts of continuing operations, and that such health, safety or environmental impacts were unf oreseeable and could not have otherwise been

avoided.

4. The permittee shall furnish to the Department, w ithin a reasonable time set by the Department (not to be less than 15 days), any information that the Department may request in writing to determine whether cause exists for modifying, revoking and reissuing, or terminating the permit, or to determine compliance with the permit. Upon request, the permittee shall also furnish to the Department copies of those records that are required to be kept pursuant to the terms of the permit. This subsection does not impair or otherwise limit the right of the permittee to assert the confidentiality of the information requested by the Department, as provided in 75-2-105, MCA.

5. Any schedule of compliance for applicable requirements with which the source is not in compliance with at the time of permit issuance sh all be supplemental to, and shall not sanction noncompliance with, the applicable requirements on which it was based.

6. For applicable requirements that will become e ffective during the permit term, the source shall meet such requirements on a timely basis unless a more detailed plan or schedule is required by the applicable requirement or the Department.

B. Certification Requirements ARM 17.8, Subchapter 12, Operating Pe rmit Program §1207 a nd §1213(7)(a)&(c)-(d)

1. Any application form, report, or compliance cer tification submitted pursuant to ARM Title 17, Chapter 8, Subchapter 12, shall contain certifica tion by a responsible official of truth, accuracy and completeness. This certification and any other certification require d under ARM Title 17, Chapter 8, Subchapter 12, shall state that, based on information and belief formed after reasonable inquiry, the statements and inform ation in the document are true, accurate and complete.

2. Compliance certifications shall be submitted by February 15 of each year, or more frequently if otherwise specified in an applicable requirement or elsewhere in the permit. Each certification must include the required information for th e previous calendar year (i.e., January 1 – December 31).OP2035-02 26 Date of Decision: 11/24/09

Effective Date: 12/25/09 3. Compliance certifications shall include the following:

a. The identification of each term or condition of the permit that is the basis of the certification;

b. The identification of the method(s) or other means used by the owner or operator for determining the status of compliance with each term and condition during the certification period, consistent with ARM 17.8.1212;

c. The status of compliance with each term a nd condition for the period covered by the certification, including whether compliance during the period was continuous or

intermittent (based on the method or means identified in ARM 17.8.1213(7)(c)(ii), as described above); and

d. Such other facts as the Department may require to determine the compliance status of the

source.

4. All compliance certifications must be submitted to the Environmental Protection Agency, as well as to the Department, at the addresses liste d in the Notification Addresses Appendix of this permit.

C. Permit Shield ARM 17.8, Subchapter 12, Oper ating Permit Program §1214(1)-(4)

1. The applicable requirements and non-federally enforceable requirements are included and specifically identified in this permit and the permit includes a precise summary of the requirements not applicable to the source. Compliance with the conditions of the permit shall be deemed compliance with any applicable re quirements and any non-federally enforceable requirements as of the date of permit issuance.

2. The permit shield described in 1 above shall rema in in effect during the appeal of any permit action (renewal, revision, reopening, or re vocation and reissuance) to the Board of Environmental Review (Board), until such time as the Board renders its final decision.

3. Nothing in this permit alters or affects the following:

a. The provisions of Sec. 7603 of the FCAA, including the authority of the administrator under that section;

b. The liability of an owner or operator of a source for any violation of applicable requirements prior to or at the time of permit issuance;

c. The applicable requirements of the Acid Rain Program, consistent with Sec. 7651g(a) of the FCAA;

d. The ability of the administrator to obtain in formation from a source pursuant to Sec. 7414 of the FCAA;

e. The ability of the Department to obtain info rmation from a source pursuant to the Montana Clean Air Act, Title 75, Chapter 2, MCA;

f. The emergency powers of the Department un der the Montana Clean Air Act, Title 75, Chapter 2, MCA; andOP2035-02 27 Date of Decision: 11/24/09

Effective Date: 12/25/09 g. The ability of the Department to establish or revise requirements for the use of Reasonably Available Control Technology (RACT) as define d in ARM Title 17, Chapter 8. However, if the inclusion of a RACT into the permit pursuant to ARM Title 17, Chapter 8, Subchapter 12, is appealed to the Board, the permit shield, as it applies to the source’s existing permit, shall remain in effect until such time as the Board has rendered its final

decision.

4. Nothing in this permit alters or affects the ability of the Department to take enforcement action for a violation of an applicable requirement or permit term demonstrated pursuant to ARM 17.8.106, Source Testing Protocol.

5. Pursuant to ARM 17.8.132, for the purpose of s ubmitting a compliance certification, nothing in these rules shall preclude the use, including the exclusive use, of any credible evidence or information relevant to whether a source would have been in compliance. However, when compliance or noncompliance is demonstrated by a test or procedure provided by permit or other applicable requirements, the source sha ll then be presumed to be in compliance or noncompliance unless that presumption is overcom e by other relevant credible evidence.

6. The permit shield will not extend to minor perm it modifications or changes not requiring a permit revision (see Sections I & J).

7. The permit shield will extend to significant perm it modifications and transfer or assignment of ownership (see Sections K & O).

D. Monitoring, Recordkeeping, and Reporting Requirements ARM 17.8, Subchapter 12, Oper ating Permit Program §1212(2)&(3)

1. Unless otherwise provided in this permit, the permittee shall maintain compliance monitoring records that include the following information:

a. The date, place as defined in the permit, and time of sampling or measurement;

b. The date(s) analyses were performed;

c. The company or entity that performed the analyses;

d. The analytical techniques or methods used;

e. The results of such analyses; and

f. The operating conditions at the time of sampling or measurement.

2. The permittee shall retain records of all require d monitoring data and s upport information for a period of at least 5 years from the date of the monitoring sample, measurement, report, or application. Support information includes a ll calibration and maintenance records and all original strip-chart recordings for continuous monitoring instrumentation, and copies of all reports required by the permit. All monitoring data, support information, and required reports and summaries may be maintained in computerized form at the plant site if the information is made available to Department personnel upon request, which may be for either hard copies or computerized format. Strip-charts must be mainta ined in their original form at the plant site

and shall be made available to Department personnel upon request.OP2035-02 28 Date of Decision: 11/24/09

Effective Date: 12/25/09 3. The permittee shall submit to the Department, at the addresses located in the Notification Addresses Appendix of this permit, reports of any required monitoring by February 15 and August 15 of each year, or more frequently if othe rwise specified in an applicable requirement or elsewhere in the permit. The monitoring report submitted on February 15 of each year must include the required monitoring information for the period of July 1 through December 31 of the previous year. The monitoring report submitted on August 15 of each year must include the required monitoring information for the period of Ja nuary 1 through June 30 of the current year. All instances of deviations from the permit requi rements must be clearly identified in such reports. All required reports must be certified by a responsible official, consistent with ARM

17.8.1207.

E. Prompt Deviation Reporting ARM 17.8, Subchapter 12, Oper ating Permit Program §1212(3)(c)

The permittee shall promptly report deviations from permit requirements, including those attributable to upset conditions as defined in the permit, the pr obable cause of such deviations, and any corrective actions or preventive measures taken. To be considered prompt, deviations shall be reported as part of the routine reporting requirements under ARM 17. 8.1212(3)(b) and, if applicable, in accordance with the malfunction reporting requirements under ARM 17.8.110, unless otherwise specified in an applicable requirement.

F. Emergency Provisions ARM 17.8, Subchapter 12, Operating Perm it Program §1201(13) and §1214(5), (6)&(8)

1. An “emergency” means any situation arising from sudden and reasonably unforeseeable events beyond the control of the source, including acts of God, which situation requires immediate corrective action to restore normal operation and causes the source to exceed a technologybased emission limitation under this permit due to the unavoidable increases in emissions attributable to the emergency. An emergenc y shall not include noncompliance to the extent caused by improperly designed equipment, lack of reasonable preventive maintenance, careless or improper operation, or operator error.

2. An emergency constitutes an affirmative defense to an action brought for noncompliance with a technology-based emission limitation if the pe rmittee demonstrates through properly signed, contemporaneous logs, or othe r relevant evidence, that:

a. An emergency occurred and the permittee can identify the cause(s) of the emergency;

b. The permitted facility was at the time being properly operated;

c. During the period of the emergency the permittee took all reasonable steps to minimize levels of emissions that exceeded the emission standards or other requirements in the permit; and

d. The permittee submitted notice of the emergency to the Department within 2 working days

of the time when emission limitations were ex ceeded due to the emergency. This notice fulfills the requirements of ARM 17.8.1212(3)(c ). This notice must contain a description of the emergency, any steps taken to mitiga te emissions, and corrective actions taken.

3. These emergency provisions are in addition to any emergency, malfunction or upset provision contained in any applicable requirement.OP2035-02 29 Date of Decision: 11/24/09

Effective Date: 12/25/09 G. Inspection and Entry ARM 17.8, Subchapter 12, Oper ating Permit Program §1213(3)&(4)

1. Upon presentation of credentials and other requirements as may be required by law, the permittee shall allow the Department, the admini strator, or an authorized representative (including an authorized contractor acting as a representative of the Department or the administrator) to perform the following:

a. Enter the premises where a source required to obtain a permit is located or emissionsrelated activity is conducted, or where record s must be kept under the conditions of the permit;

b. Have access to and copy, at reasonable times, any records that must be kept under the conditions of the permit;

c. Inspect at reasonable times any facilities, em ission units, equipment (including monitoring and air pollution control equipment), practices, or operations regulated or required under the permit; and

d. As authorized by the Montana Clean Air Act and rules promulgated thereunder, sample or monitor, at reasonable times, any substances or parameters at any location for the purpose of assuring compliance with the permit or applicable requirements.

2. The permittee shall inform the inspector of all workplace safety rules or requirements at the time of inspection. This section shall not limit in any manner the Department’s statutory right of entry and inspection as provided for in 75-2-403, MCA.

H. Fee Payment ARM 17.8, Subchapter 12, Opera ting Permit Program §1210(2)(f) and ARM 17.8, Subchapter 5, Air Quality Permit Application, Operation, and Open Burning Fees §505(3)-(5) (STATE ONLY)

1. The permittee must pay application and operating fees, pursuant to ARM Title 17, Chapter 8, Subchapter 5.

2. Annually, the Department shall provide the permittee with written notice of the amount of the fee and the basis for the fee assessment. The air quality operation fee is due 30 days after receipt of the notice, unless the fee assessment is appealed pursuant to ARM 17.8.511. If any portion of the fee is not appealed, that portion of the fee that is not appealed is due 30 days after receipt of the notice. Any remaining fee, which may be due after the completion of an appeal, is due immediately upon issuance of the Board’s decision or upon completion of any judicial

review of the Board’s decision.

3. If the permittee fails to pay the required fee (or an y required portion of an appealed fee) within 90 days of the due date of the fee, the Depart ment may impose an additional assessment of 15% of the fee (or any required portion of an appeal ed fee) or $100, whichever is greater, plus interest on the fee (or any required portion of an appealed fee), computed at the interest rate established under 15-31-510(3), MCA.

I. Minor Permit Modifications ARM 17.8, Subchapter 12, Opera ting Permit Program §1226(3)&(11)

1. An application for a minor permit modification need only address in detail those portions of the permit application that require revision, updatin g, supplementation, or deletion, and may reference any required in formation that has been previously submitted.OP2035-02 30 Date of Decision: 11/24/09

Effective Date: 12/25/09 2. The permit shield under ARM 17.8.1214 will not extend to any minor modifications processed pursuant to ARM 17.8.1226.

J. Changes Not Requiring Permit Revision ARM 17.8, Subchapter 12, Operating Permit Program §1224(1)-(3), (5)&(6)

1. The permittee is authorized to make changes w ithin the facility as described below, provided the following conditions are met:

a. The proposed changes do not require the permittee to obtain an air quality preconstruction permit under ARM Title 17, Chapter 8, Subchapter 7;

b. The proposed changes are not modifications under Title I of the FCAA, or as defined in ARM Title 17, Chapter 8, Subchapters 8, 9, or 10;

c. The emissions resulting from the proposed cha nges do not exceed the emissions allowable under this permit, whether expressed as a rate of emissions or in total emissions;

d. The proposed changes do not alter permit term s that are necessary to enforce applicable

emission limitations on emission un its covered by the permit; and

e. The facility provides the administrator and the Department with written notification at least 7 days prior to making the proposed changes.

2. The permittee and the Department shall attach each notice provided pursuant to 1.e above to their respective copies of this permit.

3. Pursuant to the conditions above, the permittee is authorized to make Section 502(b)(10) changes, as defined in ARM 17.8.1201(30), without a permit revision. For each such change, the written notification required under 1.e above shall include a description of the change within the source, the date on which the change will occur, any change in emissions, and any permit term or condition that is no longer applicable as a result of the change.

4. The permittee may make a change not specifically addressed or prohibited by the permit terms and conditions without requiring a permit revision, provided the following conditions are met:

a. Each proposed change does not weaken the enforceability of any existing permit conditions;

b. The Department has not objected to such change;

c. Each proposed change meets all applicable requirements and does not violate any existing permit term or condition; and

d. The permittee provides contemporaneous wr itten notice to the Department and the administrator of each change that is above the level for insignificant emission units as defined in ARM 17.8.1201(22) and 17.8.1206(3), and the written notice describes each such change, including the date of the change , any change in emissions, pollutants emitted, and any applicable requirement that would apply as a result of the change.

5. The permit shield authorized by ARM 17.8.1214 shall not apply to changes made pursuant to ARM 17.8.1224(3) and (5), but is applicable to terms and conditions that allow for increases and decreases in emissions pursuant to ARM 17.8.1224(4).OP2035-02 31 Date of Decision: 11/24/09

Effective Date: 12/25/09 K. Significant Permit Modifications ARM 17.8, Subchapter 12, Operati ng Permit Program §1227(1), (3)&(4)

1. The modification procedures set forth in 2 below must be used for any application requesting a significant modification of this permit. Signi ficant modifications include the following:

a. Any permit modification that does not qualify as either a minor modification or as an administrative permit amendment;

b. Every significant change in existing pe rmit monitoring terms or conditions;

c. Every relaxation of permit reporting or recor dkeeping terms or conditions that limit the Department’s ability to determine compliance with any applicable rule, consistent with the requirements of the rule; or

d. Any other change determined by the Department to be significant.

2. Significant modifications shall meet all require ments of ARM Title 17, Chapter 8, including those for applications, public participation, and re view by affected states and the administrator, as they apply to permit issuance and renewal, excep t that an application for a significant permit modification need only address in detail those porti ons of the permit application that require revision, updating, supplementation or deletion.

3. The permit shield provided for in ARM 17.8.1 214 shall extend to significant modifications.

L. Reopening for Cause ARM 17.8, Subchapter 12, Oper ating Permit Program §1228(1)&(2)

This permit may be reopened and revi sed under the following circumstances:

1. Additional applicable requirements under the FCAA become applicable to the facility when the permit has a remaining term of 3 or more years. Reopening and revision of the permit shall be completed not later than 18 months after promulgation of the applicable requirement. No reopening is required under ARM 17.8.1228(1)(a) if the effective date of the applicable requirement is later than the date on which th e permit is due to expire, unless the original permit or any of its terms or conditions have been extended pursuant to ARM 17.8.1220(12) or 17.8.1221(2);

2. Additional requirements (including excess emission requirements) become applicable to an affected source under the Acid Rain Program. Upon approval by the administrator, excess emission offset plans shall be deemed incorporated into the permit;

3. The Department or the administrator determines th at the permit contains a material mistake or

that inaccurate statements were made in estab lishing the emission standards or other terms or conditions of the permit; or

4. The administrator or the Department determines that the permit must be revised or revoked and reissued to ensure compliance w ith the applicable requirements.

M. Permit Expiration and Renewal ARM 17.8, Subchapter 12, Operating Permit Pr ogram §1210(2)(g), §1220(11)&(12), and §1205(2)(d)

1. This permit is issued for a fixed term of 5 years.OP2035-02 32 Date of Decision: 11/24/09

Effective Date: 12/25/09 2. Renewal of this permit is subject to the same procedural requirements that apply to permit issuance, including those for application, content, public participation, and affected state and

administrator review.

3. Expiration of this permit terminates the permittee’s right to operate unless a timely and administratively complete renewal applicati on has been submitted consistent with ARM 17.8.1221 and 17.8.1205(2)(d). If a timely and administratively complete application has been submitted, all terms and conditions of the permit, including the application shield, remain in effect after the permit expires until the pe rmit renewal has been issued or denied.

4. For renewal, the permittee shall submit a comple te air quality operating permit application to the Department not later than 6 months prior to the expiration of this permit, unless otherwise specified. If necessary to ensure that the terms of the existing permit will not lapse before renewal, the Department may specify, in wr iting to the permittee, a longer time period for submission of the renewal application. Such written notification must be provided at least 1 year before the renewal application due date established in the existing permit.

N. Severability Clause ARM 17.8, Subchapter 12, Opera ting Permit Program §1210(2)(i)&(l)

1. The administrative appeal or subsequent judicial review of the issuance by the Department of an initial permit under this subchapter sha ll not impair in any manner the underlying applicability of all applicable requirements, a nd such requirements continue to apply as if a final permit decision had not been reached by the Department.

2. If any provision of a permit is found to be i nvalid, all valid parts that are severable from the invalid part remain in effect. If a provision of a permit is invalid in one or more of its applications, the provision remains in effect in all valid applications that are severable from the invalid applications.

O. Transfer or Assignment of Ownership ARM 17.8, Subchapter 12, Oper ating Permit Program §1225(2)&(4)

1. If an administrative permit amendment involves a change in ownership or operational control, the applicant must include in its request to the Department a written agreement containing a specific date for the transfer of permit responsib ility, coverage and liability between the current and new permittee.

2. The permit shield provided for in ARM17.8.1214 shall not extend to administrative permit

amendments.

P. Emissions Trading, Marketable Permits, Economic Incentives ARM 17.8, Subchapter 12, Op erating Permit Program §1226(2)

Notwithstanding ARM 17.8.1226(1) and (7), mi nor air quality operating permit modification procedures may be used for permit modificati ons involving the use of economic incentives, marketable permits, emissions trading, and other si milar approaches, to the extent that such minor permit modification procedures are explicitly provide d for in the Montana State Implementation Plan or in applicable requirements promulgated by the administrator.

Q. No Property Rights Conveyed ARM 17.8, Subchapter 12, Oper ating Permit Program §1210(2)(d)

This permit does not convey any property rights of any sort, or any exclusive privilege.OP2035-02 33 Date of Decision: 11/24/09

Effective Date: 12/25/09 R. Testing Requirements ARM 17.8, Subchapter 1, General Provisions §105

The permittee shall comply with ARM 17.8.105.

S. Source Testing Protocol ARM 17.8, Subchapter 1, General Provisions §106

The permittee shall comply with ARM 17.8.106.

T. Malfunctions ARM 17.8, Subchapter 1, General Provisions §110

The permittee shall comply with ARM 17.8.110.

U. Circumvention ARM 17.8, Subchapter 1, General Provisions §111

The permittee shall comply with ARM 17.8.111.

V. Motor Vehicles ARM 17.8, Subchapter 3, Emission Standards §325

The permittee shall comply with ARM 17.8.325.

W. Annual Emissions Inventory ARM 17.8, Subchapter 5, Air Quality Permit A pplication, Operation and Open Burning Fees §505 (STATE ONLY)

The permittee shall supply the Department with annual production and other information for all emission units necessary to calculate actual or estimated actual amount of air pollutants emitted during each calendar year. Information shall be gathered on a calendar-year basis and submitted to the Department by the date required in the emi ssion inventory request, unless otherwise specified in this permit. Information shall be in the units required by the Department.

X. Open Burning ARM 17.8, Subchapter 6, Open Burning §604, 605 and 606

The permittee shall comply with ARM 17.8.604, 605 and 606.

Y. Montana Air Quality Permits ARM 17.8, Subchapter 7, Permit, Construction a nd Operation of Air Contaminant Sources §745 and

764 (ARM 17.8.745(1) and 764(1)(b) are STATE ENFORCEABLE ONLY until approval by the EPA as part of the SIP)

1. Except as specified, no person shall construct, inst all, modify or use any air contaminant source or stack associated with any source without first obtaining a permit from the Department or Board. A permit is not required for those sources or stacks as specified by ARM 17.8.744(1)(a)-(k).

2. The permittee shall comply with AR M 17.8.743, 744, 745, 748, and 764.OP2035-02 34 Date of Decision: 11/24/09

Effective Date: 12/25/09 3. ARM 17.8.745(1) specifies de minimis chang es as construction or changed conditions of operation at a facility holding Montana Air Quality Permit issued under Chapter 8 that does not increase the facility’s potential to emit by more than 15 tons per year of any pollutant, except (STATE ENFORCEABLE ONLY until approved by the EPA as part of the SIP):

a. Any construction or changed condition that would violate any condition in the facility’s existing Montana Air Quality Permit or any ap plicable rule contained in Chapter 8 is prohibited, except as provided in ARM 17.8.745(2);

b. Any construction or changed conditions of operation that would qualify as a major modification under Subchapters 8, 9 or 10 of Chapter 8;

c. Any construction or changed c ondition of operation that would affect the plume rise or dispersion characteristic of emissions that w ould cause or contribute to a violation of an ambient air quality standard or ambient air increment as defined in ARM 17.8.804;

d. Any construction or improvement project with a potential to emit more than 15 tons per year may not be artificially split into smalle r projects to avoid air quality preconstruction permitting; or

e. Emission reductions obtained th rough offsetting within a facility are not included when determining the potential emission increase fro m construction or ch anged conditions of operation, unless such reductions are made federally enforceable.

4. Any facility making a de minimis change pursuant to ARM 17.8.745(1) shall notify the Department if the change would include a change in control equipment, stack height, stack diameter, stack gas temperature, source location or fuel specifications, or would result in an increase in source capacity above its permitted opera tion or the addition of a new emission unit. The notice must be submitted, in writing, 10 days prior to start up or use of the proposed de minimis change, or as soon as reasonably prac ticable in the event of an unanticipated circumstance causing the de minimis change, and must include the information requested in ARM 17.8.745(1) (STATE ENFORCEABLE ONLY until approval by the EPA as part of the SIP).

Z. National Emission Standard for Asbestos 40 CFR, Part 61, Subpart M

The permittee shall not conduct any asbestos abat ement activities except in accordance with 40 CFR 61, Subpart M (National Emission Standard for Hazardous Air Pollutants for Asbestos).

AA. Asbestos ARM 17.74, Subchapter 3, General Provisions and Subchapter 4, Fees

The permittee shall comply with ARM 17.74.301, et seq ., and ARM 17.74.401, et seq . (State only)

BB. Stratospheric Ozone Protection – Servic ing of Motor Vehicle Air Conditioners 40 CFR, Part 82, Subpart B

If the permittee performs a service on motor vehicles and this service involves ozone-depleting substance/refrigerant in the motor vehicle air conditioner (MVAC), the permittee is subject to all the applicable requirements as specified in 40 CFR 82, Subpart B.OP2035-02 35 Date of Decision: 11/24/09

Effective Date: 12/25/09 CC. Stratospheric Ozone Protection – Recycling and Emission Reductions 40 CFR, Part 82, Subpart F

The permittee shall comply with the standards for recycling and emission reductions in 40 CFR 82, Subpart F, except as provided for MVACs in Subpart B:

1. Persons opening appliances for maintenance, service, repair, or disposal must comply with the required practices pursuant to §82.156;

2. Equipment used during the maintenance, service, re pair or disposal of appliances must comply with the standards for recycling and r ecovery equipment pursuant to §82.158;

3. Persons performing maintenance, service, repair or disposal of appliances must be certified by an approved technical certification program pursuant to §82.161;

4. Persons disposing of small appliances, M VACs and MVAC-like (as defined at §82.152) appliances must comply with recordkeep ing requirements pursuant to §82.166;

5. Persons owning commercial or industrial process re frigeration equipment must comply with the leak repair requirements pursuant to §82.156; and

6. Owners/operators of appliances normally containing 50 or more pounds of refrigerant must keep records of refrigerant purchased and adde d to such appliances pursuant to §82.166.

DD. Emergency Episode Plan

The permittee shall comply with the requirements c ontained in Chapter 9.7 of the State of Montana Air Quality Control Implementation Plan.

Each major source emitting 100 tons per year located in a Priority I Air Quality Control Region, shall submit to the Department a legally enforceable Em ergency Episode Action Plan (EEAP) that details how the source will curtail emissions during an ai r pollutant emergency episode. The industrial EEAP shall be in accordance with the Department ’s EEAP and shall be submitted according to a timetable developed by the Department, following Priority I reclassification.

EE. Definitions

Terms not otherwise defined in this permit or in the Definitions and Abbrev iations Appendix of this permit, shall have the meaning assigned to them in the referenced regulations.OP2035-02 36 Date of Decision: 11/24/09

Effective Date: 12/25/09 APPENDICESOP2035-02 A-1 Date of Decision: 11/24/09

Effective Date: 12/25/09 Appendix A INSIGNIFICANT EMISSION UNITS

Disclaimer: The information in this appendix is not Stat e or Federally enforceable, but is presented to assist CELP, the permitting authority, inspectors, and the public.

Pursuant to ARM 17.8.1201(22)(a), an insignificant emission unit means any activity or emissions unit located within a source that: (i) has a potential to emit less than 5 tons per year of any regulated pollutant; (ii) has a potential to emit less than 500 pounds per year of lead; (iii) has a potential to emit less than 500 pounds per year of hazardous air pollutants listed pursuant to Sec. 7412 (b) of the FCAA; and (iv) is not regulated by an applicable requirement, other than a generally applicable requirement that applies to all emission units subject to Subchapter 12.

List of Insignificant Activities:

The following table of insignificant sources and/or act ivities were provided by CELP. Because there are no requirements to update such a list, the emission un its and/or activities may change from those specified

in the table.

Emissions Unit ID Description

IEU01 Fugitive Emissions: Diesel Fuel Combustion

IEU02 Diesel Fuel Oil Storage Tanks

IEU03 Diesel-fired Emergency Boiler Feed Pump

IEU04 Diesel-fired Fire Water Supply Pump

IEU05 Propane-fired Portable Heaters

IEU06 Gasoline-fired Portable WelderOP2035-02 B-1 Date of Decision: 11/24/09

Effective Date: 12/25/09 Appendix B DEFINITIONS and ABBREVIATIONS

"Act" means the Clean Air Act, as amended, 42 U.S. 7401, et seq

.

"Administrative permit amendment" means an air quality operating permit revision that:

(a) Corrects typographical errors;

(b) Identifies a change in the name, address or pho ne number of any person identified in the air quality operating permit, or identifies a similar minor administrative change at the source;

(c) Requires more frequent monitoring or reporting by CELP;

(d) Requires changes in monitoring or reporting requi rements that the Department deems to be no less stringent than current monitoring or reporting requirements;

(e) Allows for a change in ownership or operational control of a source if the Department has determined that no other change in the air qua lity operating permit is necessary, consistent with ARM 17.8.1225; or

(f) Incorporates any other type of change which the Department has determined to be similar to those revisions set forth in (a)-(e), above.

"Applicable requirement" means all of the following as they apply to emission units in a source requiring an air quality operating permit (including requi rements that have been promulgated or approved by the Department or the administrator through rule making at the time of issuance of the air quality operating permit, but have future-effective compliance dates, provided that such requirements apply to sources covered under the operating permit):

(a) Any standard, rule, or other requirement, including any requirement contained in a consent decree or judicial or administrative order entere d into or issued by the Department, that is contained in the Montana state implementa tion plan approved or promulgated by the administrator through rule making under Title I of the FCAA;

(b) Any federally enforceable term, condition or other requirement of any air quality preconstruction permit issued by the Department under Subchapters 7, 8, 9 and 10 of this chapter, or pursuant to regu lations approved or promulgated through rule making under Title I of the FCAA, including Parts C and D;

(c) Any standard or other requirement under Sec. 7411 of the FCAA, including Sec. 7411(d);

(d) Any standard or other requirement under Sec. 7412 of the FCAA, including any requirement concerning accident prevention under Sec. 7412(r)(7), but excluding the contents of any risk management plan required under Sec. 7412(r);

(e) Any standard or other requirement of the acid rain program under Title IV of the FCAA or regulations promulgated thereunder;

(f) Any requirements established pursuant to Sec. 7661c(b) or Sec. 7414(a)(3) of the FCAA;

(g) Any standard or other requirement governing soli d waste incineration, under Sec. 7429 of the FCAA;OP2035-02 B-2 Date of Decision: 11/24/09

Effective Date: 12/25/09 (h) Any standard or other requirement for c onsumer and commercial products, under Sec. 7511b(e) of the FCAA;

(i) Any standard or other requirement for ta nk vessels, under Sec. 7511b(f) of the FCAA;

(j) Any standard or other requirement of the regul ations promulgated to protect stratospheric ozone under Title VI of the FCAA, unless the administrator determines that such requirements need not be contained in an air quality operating permit;

(k) Any national ambient air quality standard or in crement or visibility requirement under Part C of Title I of the FCAA, but only as it would ap ply to temporary sources permitted pursuant to Sec. 7661c(e) of the FCAA; or

(l) Any federally enforceable term or condition of any air quality open burning permit issued by the Department under Subchapter 6.

"Department" means the Montana Department of Environmental Quality.

“Excess Emissions” means any visible emissions from a stack or source, viewed during the visual surveys, that meets or exceeds 15% opacity (or 30% opacity if associ ated with a 40% opacity limit) during normal operating conditions.

"Emissions unit" means any part or activity of a stationary source that emits or has the potential to emit any regulated air pollutant or any pollutant listed under Sec. 7412(b) of the FCAA. This term is not

meant to alter or affect the definition of the te rm "unit" for purposes of Title IV of the FCAA.

"FCAA" means the Federal Clean Air Act, as amended.

"Federally enforceable" means all limitations and conditi ons which are enforceable by the administrator, including those requirements developed pursuant to 40 CFR Parts 60 and 61, requirements within the Montana state implementation plan, and any permit requirement established pursuant to 40 CFR 52.21 or under regulations approved pursuant to 40 CFR Part 51, Subpart I, including operating permits issued under an EPA approved program th at is incorporated into the Montana state implementation plan and expressly requires adhere nce to any permit issued under such program.

"Fugitive emissions" means those emissions which could not reasonably pass through a stack, chimney, vent, or other functionall y equivalent opening.

"General air quality operating permit" or "general permit" means an air quality operating permit that meets the requirements of ARM 17.8.1222, covers multip le sources in a source category, and is issued in lieu of individual permits being issued to each source.

"Hazardous air pollutant" means any air pollutant listed as a hazardous air pollutant pursuant to Section 112(b) of the FCAA.

"Non-federally enforceable requirement" means the following as they apply to emission units in a source requiring an air quality operating permit:

(a) Any standard, rule, or other requirement, including any requirement contained in a consent decree, or judicial or administrative order entered into or issued by the Department, that is not contained in the Montana state implementa tion plan approved or promulgated by the administrator through rule making under Title I of the FCAA;OP2035-02 B-3 Date of Decision: 11/24/09

Effective Date: 12/25/09 (b) Any term, condition or other requirement contained in any air qualit y preconstruction permit issued by the Department under Subchapters 7, 8, 9 and 10 of this chapter that is not federally enforceable;

(c) Does not include any Montana ambient air quality st andard contained in Subchapter 2 of this chapter.

"Permittee" means the owner or operator of any source s ubject to the permitting requirements of this subchapter, as provided in ARM 17.8.1204, that hol ds a valid air quality operating permit or has submitted a timely and complete perm it application for issuance, renewal, amendment, or modification pursuant to this subchapter.

"Regulated air pollutant" means the following:

(a) Nitrogen oxides or any volatile organic compounds;

(b) Any pollutant for which a national ambient ai r quality standard has been promulgated;

(c) Any pollutant that is subject to any standard promulgated under Sec. 7411 of the FCAA;

(d) Any Class I or II substance subject to a standard promulgated under or established by Title VI of the FCAA; or

(e) Any pollutant subject to a standard or othe r requirement established or promulgated under Sec. 7412 of the FCAA, including but not limited to the following:

(i) Any pollutant subject to requirements under Sec. 7412(j) of the FCAA. If the administrator fails to promulgate a standard by the date established in Sec. 7412(e) of the FCAA, any pollutant for which a subject source would be major shall be considered to be regulated on the date 18 months after the app licable date established in Sec. 7412(e) of the FCAA;

(ii) Any pollutant for which the requirements of Sec. 7412(g)(2) of the FCAA have been met but only with respect to the individual source subject to Sec. 7412(g)(2) requirement.

"Responsible official" means one of the following:

(a) For a corporation: a president, secretary, treasurer, or vice-president of the corporation in charge of a principal business function, or a ny other person who performs similar policy or decision-making functions for the corporation, or a duly authorized representative of such person if the representative is responsible for the overall operation of one or more manufacturing, production, or operating facilities applying for or subject to a permit and

either:

(i) The facilities employ more than 250 persons or have gross annual sales or expenditures exceeding $25 million (in second quarter 1980 dollars); or

(ii) The delegation of authority to such re presentative is approved in advance by the Department.

(b) For a partnership or sole proprietorship: a ge neral partner or the proprietor, respectively.OP2035-02 B-4 Date of Decision: 11/24/09

Effective Date: 12/25/09 (c) For a municipality, state, federal, or other pub lic agency: either a pr incipal executive officer or ranking elected official. For the purposes of this part, a principal executive officer of a federal agency includes the chief executive officer having responsibility for the overall operations of a principal geographic unit of the agency (e.g., a regional administrator of the environmental protection agency).

(d) For affected sources: the designated representative in so far as actions, standards, requirements, or prohibitions under Title IV of the FCAA or the regulations promulgated thereunder are concerned, and the designated representative for any other purposes under this subchapter.OP2035-02 B-5 Date of Decision: 11/24/09

Effective Date: 12/25/09 Abbreviations:

ARM Administrative Rules of Montana ASTM American Society of Testing Materials BACT Best Available Control Technology BDT bone dry tons

BTU British Thermal Unit CFR Code of Federal Regulations

CO carbon monoxide DEQ Department of Environmental Quality dscf dry standard cubic foot dscfm dry standard cubic foot per minute EEAP Emergency Episode Action Plan EPA U.S. Environmental Protection Agency EPA Method Test methods contained in 40 CFR 60, Appendix A

EU emissions unit

FCAA Federal Clean Air Act gr grains HAP hazardous air pollutant IEU insignificant emissions unit

Mbdft thousand board feet Method 5 40 CFR 60, Appendix A, Method 5 Method 9 40 CFR 60, Appendix A, Method 9

MMbdft million board feet

MMBTU million British Thermal Units NOx oxides of nitrogen

NO 2 nitrogen dioxide

O 2 oxygen Pb lead PM particulate matter PM10 particulate matter less than 10 microns in size psi pounds per square inch

scf standard cubic feet

SIC Source Industrial Classification

SO 2 sulfur dioxide

SOx oxides of sulfur

tpy tons per year U.S.C. United States Code

VE visible emissions VOC volatile organic compoundOP2035-02 C-1 Date of Decision: 11/24/09

Effective Date: 12/25/09 Appendix C NOTIFICATION ADDRESSES

Compliance Notifications:

Montana Department of Environmental Quality Permitting and Compliance Division Air Resources Management Bureau

P.O. Box 200901 Helena, MT 59620-0901

United States EPA Air Program Coordinator Region VIII, Montana Office

10 W. 15 th Street, Suite 3200 Helena, MT 59626

Permit Modifications:

Montana Department of Environmental Quality Permitting and Compliance Division Air Resources Management Bureau

P.O. Box 200901 Helena, MT 59620-0901

Office of Partnerships and Regulatory Assistance Air and Radiation Program US EPA Region VIII 8P-AR 1595 Wynkoop Street Denver, CO 80202-1129OP2035-02 D-1 Date of Decision: 11/24/09

Effective Date: 12/25/09 Appendix D AIR QUALITY INSPECTOR INFORMATION

Disclaimer: The information in this appendix is not State or Federally enforceable, but is presented to assist CELP, permitting authority, inspectors, and the public.

1. Direction to Plant: Located approximately 6 miles north of Colstrip, Montana on Highway 39, 18

Snider Subdivision Road.

2. Safety Equipment Required:

The safety information listed below was contained in a document titled Plant Operating Procedures: Basis Safety Rules dated September 4, 1991 that was provided by CELP on September 25, 1996. Only safety information determined by the Department to be pertinent to State and/or federal air quality inspectors is contained in this appendix.

1. Smoking is prohibited except in designated areas.

2. Aisles and walkways shall be kept clear at all times.

3. Climbing through machinery and equipment as a short-cut is prohibited.

4. “Horseplay” shall not be tolerated in the plant.

5. Long sleeve shirts shall be worn plant-wide except for the main office and parking lot.

6. Loose or torn clothing, long hair, rings, or pendant jewelry shall not be worn around moving machinery.

7. Thin-soled, badly worn, open-toed, or tennis shoes shall not be worn in the plant. Sturdy leather or safety boots are recommended.

8. Safety glasses and hard hats are required excep t in office spaces, the control room, inside vehicles, shop buildings, and to and from the parking lot area.

9. Appropriate eye and ear protection shall be worn as required.

10. Respirators and dust masks shall be worn as required.

11. Doors and barriers protecting live electrical e quipment and switches shall not be opened except by authorized personnel and shall not be left open without proper safety barriers.

12. Climbing on boxes, equipment, or structures not designated as a work area or means of access is prohibited.

13. Safety belts or other adequate protection as required shall be used for work in elevated positions.

14. Bins, empty tanks, or sealed spaces shall not be entered without adequate air supply, ventilation, and proper training in Confined Space Entry.

15. A speed limit of 15 MPH is in force on the pl ant property at all times except in congested areas

where the limit is reduced to 10 MPH.OP2035-02 D-2 Date of Decision: 11/24/09

Effective Date: 12/25/09 3. Facility Plot Plan: The facility plot plan was submitted as part of the application submitted on June 8, 1995.OP2035-02 E-1 Date of Decision: 11/24/09

Effective Date: 12/25/09 Appendix E Continuous Emission Monitoring Systems (CEMS)

The following monitors shall be installed and operated on the boiler stack outlet: SO 2 , NO

x , opacity, CO,

and O 2 or CO 2 . Said monitors shall comply with the app licable provisions of 40 CFR 60, Subpart Da 60.47a; Subpart A, 60.7; Appendix B, Specifications 1, 2, 3 and 4; and Appendix F. The monitors shall also conform to, but not be limited to, the following:

1. Continuous Opacity Monitoring System (COMS)

a. CELP shall install, calibrate, maintain, a nd operate COMS to monitor and record the opacity of the gases discharged into the atmosphere from the boiler.

(1) The span of these systems shall be set at 100% opacity.

(2) The COMS shall conform to all requirements of 40 CFR Part 60, Appendix B, Performance Specification 1 - Specifications and Test Procedures for Opacity Continuous Emission Monitoring Systems in Stationary Sources (PS1).

(3) The COMS data will be used to dem onstrate compliance with the 20% opacity limitation in Section III.E.1. CELP shall maintain compliance with the 20% opacity limitation, as demonstrated by the COMS.

b. CELP shall submit a written report of all ex cess opacity emissions quarterly. Periods of excess emissions shall be defined as those averaged over a six-minute period for which the average is greater than 20% opacity. The report shall be in the format contained in Attachment 1 and include, as a minimum, the following:

(1) The magnitude of excess emissions and the date and time of commencement and completion of each time period of excess emissions.

(2) Specific identification of each period of excess emissions that occurs during startups, shutdowns, and malfunctions of the affected facility. The nature and cause of any malfunction (if known), the corrective action taken or preventative measures adopted.

(3) The date and time identifying each period during which the COMS was inoperative except for zero and span checks. The nature of the system repairs or adjustments must also be reported.

(4) When no excess emissions have occurred or the COMS have not been inoperative, repaired, or adjusted, such in formation shall be stated in the report.

(5) The percentage of time the COMS was operating shall be calculated as follows:

(1 - hours of COMS downtime during reporting period * ) x 100 hours the source operated during reporting period

* All time required for calibra tion and to perform preventative

maintenance must be included in COMS downtime.

This shall be reported as percent monitor availability during plant operation. CELP shall maintain a minimum of 95% monitor availability during plant operation on a quarterly basis.OP2035-02 E-2 Date of Decision: 11/24/09

Effective Date: 12/25/09 Nothing in this section shall preclude enforcement action for data availability that is less than 100% but equal to or greater than 95% if the conditions in Appendix E Section 5 are not satisfied.

(6) The percentage of time the COMS indicated compliance. This shall be

calculated as:

(1 - total hours of excess emissions during reporting period ) x 100

total hours of COMS av ailability during reporting period

This shall be reported as percent compliance. CELP shall maintain compliance with the 20% limitation, as demonstrated by the COMS in

accordance with Section III.E.1.

(7) The excess emission reports shall be s ubmitted within 30 days following the end of the reporting period (January-Mar ch, April-June, July-September, and October-December).

c. CELP shall inspect and audit the COMS qua rterly, using neutral density filters. CELP shall conduct these audits using the appropr iate procedures and forms in the EPA

Technical Assistance Document: Performan ce Audit Procedures for Opacity Monitors (EPA-600/8-87-025, April 1987). The results of these inspections and audits shall be included in the quarterly excess emission report.

d. CELP shall maintain a file of all measu rements from the COMS performance testing measurements; all COMS performance eval uations; all COMS or monitoring device calibration checks and audits; adjustments and maintenance performed on these systems or devices recorded in a permanent form suitable for inspection. The file shall be retained on site for at least five years fo llowing the date of such measurements and reports. CELP shall supply these records to the Department upon request.

2. Continuous Emission Monitoring System (CEMS) - SO 2

a. CELP shall install, calibrate, maintain, a nd operate CEMS to monitor and record the sulfur dioxide (SO 2 ) concentrations of the gases discharged into the atmosphere from the

boiler.

(1) The span of this system shall be set as required in 40 CFR 60.47a.

(2) The CEMS shall conform to all requirements of 40 CFR Part 60 Subpart Da -

Standards of Performance for Electric Utility Steam Generation Units; Appendix B, Performance Specification 2 - Specifications and Test Procedures for SO 2 and NOx Continuous Emission Monitoring Syst ems in Stationary Sources (PS2); and Appendix F, Quality Assurance Procedures.

(3) The CEMS data will be used to dem onstrate compliance with the limitations

contained in Section III.E.2 and III.E.4 CELP shall maintain compliance with the limitations, as demonstrated by the CEMS.

b. CELP shall submit a written report of all excess emissions quarterly. Periods of excess

emissions shall be defined as those emissions calculated on an hourly, 3-hour, calendar day, annual and rolling 30-day basis which are greater than the limitations. The report shall be in the format contained in Attachment 1 and including, as a minimum, the following:OP2035-02 E-3 Date of Decision: 11/24/09

Effective Date: 12/25/09 (1) The magnitude of excess emissions and the date and time of commencement and completion of each time period of excess emissions.

(2) Specific identification of each period of excess emissions that occurs during startups, shutdowns, and malfunctions of the affected facility. The nature and cause of any malfunction (if known), the corrective action taken or preventative measures adopted.

(3) The date and time identifying each period during which the CEMS was inoperative except for zero and span checks. The nature of the system repairs or adjustments must also be reported.

(4) When no excess emissions have occurred or the CEMS have not been inoperative, repaired, or adjusted, such in formation shall be stated in the report.

(5) The percentage of time the CEMS was operating. This shall be calculated as

(1 - hours of CEMS downtime during reporting period * ) x 100 hours the source operated during reporting period

* All time required for calibra tion and to perform preventative

maintenance must be included in CEMS downtime.

This shall be reported as percent monitor availability during plant operation. CELP shall maintain a minimum of 95% monitor availability during plant operation on a quarterly basis.

Nothing in this section shall preclude enforcement action for data availability that is less than 100%, but equal to or greater than 95% if the conditions in Appendix E Section 5 are not satisfied.

(6) The percentage of time the CEMS indica ted compliance. This shall be calculated

as:

(1 - total hours of excess emis sions during re porting period ) x 100 total hours of CEMS availability during reporting period

This shall be reported as percent compliance. CELP shall maintain compliance with the limitations, as demonstrated by the CEMS.

(7) The excess emission reports shall be s ubmitted within 30 days following the end of the reporting period (January-Mar ch, April-June, July-September, and October-December).

c. CELP shall inspect and audit the CEMS quarterly to meet the requirement contain in 40 CFR Part 60 Appendix F. CELP shall c onduct these audits using the appropriate procedures. The results of these inspections a nd audits shall be included in the quarterly excess emission report.

d. CELP shall maintain a file of all measu rements from the CEMS and performance testing measurements; all CEMS performance eval uations; all CEMS or monitoring device calibration checks and audits; adjustments and maintenance performed on these systems or devices recorded in a permanent form suitable for inspection. The file shall be retained on site for at least five years fo llowing the date of such measurements and reports. CELP shall supply these records to the Department upon request.OP2035-02 E-4 Date of Decision: 11/24/09

Effective Date: 12/25/09 3. Continuous Emission Monitoring System (CEMS) – NO

x

a. CELP shall install, calibrate, maintain, and operate continuous emissions monitoring systems (CEMS) to monitor and record the nitrogen oxide (NO

x ) concentrations of the gases discharged into the atmosphere from the boiler.

(1) The span of this system shall be set at 1,000 ppm.

(2) The CEMS shall conform to all requi rements of 40 CFR Part 60, Appendix B, Performance Specification 2 - Specifications and Test Procedures for SO 2 and

NO

x Continuous Emission Monitoring Sy stems in Stationary Sources (PS 2 ) and Appendix F, Quality Assurance Procedures.

(3) The CEMS data will be used to dem onstrate compliance with the limitations contained in Section III.E.2. CELP shall maintain compliance with the limitations, as demonstrated by the CEMS.

b. CELP shall submit a written report of all excess emissions quarterly. Periods of excess

emissions shall be defined as those emissions calculated on an hourly, calendar day, and annual basis which are greater than the limitations. The report shall be in the format contained in Attachment 1 and including, as a minimum, the following:

(1) The magnitude of excess emissions and the date and time of commencement and completion of each time period of excess emissions.

(2) Specific identification of each period of excess emissions that occurs during startups, shutdowns, and malfunctions of the affected facility. The nature and cause of any malfunction (if known), the corrective action taken or preventative measures adopted.

(3) The date and time identifying each period during which the CEMS was inoperative except for zero and span checks. The nature of the system repairs or adjustments must also be reported.

(4) When no excess emissions have occurred or the CEMS have not been inoperative, repaired, or adjusted, such in formation shall be stated in the report.

(5) The percentage of time the CEMS was operating. This shall be calculated as

(1 - hours of CEMS downtime during reporting period* ) x 100 hours the source operated during reporting period

* All time required for calibra tion and to perform preventative

maintenance must be included in CEMS downtime.

This shall be reported as percent monitor availability during plant operation. CELP shall maintain a minimum of 95% monitor availability during plant operation on a quarterly basis.

Nothing in this section shall preclude enforcement action for data availability that is less than 100% but equal to or greater than 95% if the conditions in Appendix E Section 5 are not satisfied.OP2035-02 E-5 Date of Decision: 11/24/09

Effective Date: 12/25/09 (6) The percentage of time the CEMS indicated compliance. This shall be

calculated as:

(1 - total hours of excess emis sions during re porting period ) x 100 total hours of CEMS availability during reporting period

This shall be reported as percent compliance. CELP shall maintain compliance with the limitations, as demonstrated by the CEMS.

(7) The excess emission reports shall be s ubmitted within 30 days following the end of the reporting period (January-Mar ch, April-June, July-September, and October-December).

c. CELP shall inspect and audit the CEMS quart erly using Certified Gas Audits or Relative Accuracy Audits (RAA). CELP shall c onduct these audits using the appropriate procedures. The results of these inspections a nd audits shall be included in the quarterly excess emission report.

d. CELP shall maintain a file of all measu rements from the CEMS and performance testing measurements; all CEMS performance eval uations; all CEMS or monitoring device calibration checks and audits; adjustments and maintenance performed on these systems or devices recorded in a permanent form suitable for inspection. The file shall be retained on site for at least five years fo llowing the date of such measurements and reports. CELP shall supply these records to the Department upon request.

4. Continuous Emission Monitoring System (CEMS) - CO and O 2 or CO 2

a. CELP shall install, calibrate, maintain, and operate CEMS to monitor and record CO and

O 2 or CO 2 of the gases discharged into the atmosphere from the boiler.

(1) The CEMS shall conform to all requirements of 40 CFR Part 60 Subpart Da - Standards of Performance for Electric Utility Steam Generation Units; Appendix B, Performance Specification 3 - Specifications and Test Procedures

for O 2 and CO 2 Continuous Emission Monitoring Systems in Stationary Sources (PS3) and Performance Specification 4 -S pecifications and Test Procedures for CO Continuous Emission Monitoring Systems in Stationary Sources (PS4); and Appendix F, Quality Assurance Procedures.

(2) The CEMS shall conform to all requirements of 40 CFR 60.47a.

5. In addition to complying with the minimum quart erly data recovery rates specified in Appendix E, CELP shall undertake its best efforts to strive for and achieve the highest average quarterly data recovery rate which is practical. The determination of what is practical and, therefore, acceptable data loss shall be made cons istent with Appendix E Section 6.

6. In regards to quarterly data recovery rate re quirements specified in Appendix E, the determination of what is practical and, therefore, acceptable data loss shall consider whether:

a. CELP has properly operated and maintain ed the continuous emission monitors and associated data acquisition systems, including the performance of preventative maintenance, the maintenance of the spare parts inventory and the conduct of the quality assurance requirements.OP2035-02 E-6 Date of Decision: 11/24/09

Effective Date: 12/25/09 b. CELP has taken immediate and appropriate action to correct a malfunction in the

continuous emission monitors and asso ciated data acquisitions systems.OP2035-02 E-7 Date of Decision: 11/24/09

Effective Date: 12/25/09 ATTACHMENT 1

INSTRUCTIONS FOR COMPLETING EXCESS EMISSIONS AND MONITORING SYSTEMS REPORTS (EER)

PART 1 Complete as shown.

PART 2 Complete as shown. Report total time th e point source operated during the reporting period in hours. The determination of point source ope rating time includes time during unit startup, shutdown, malfunctions, or whenever pollutants (o f any magnitude) are generated, regardless of unit condition or operating load.

Percent of time CEMS was available during point source operation is to be determined as:

( 1 - (CEMS downtime in hours during reporting period * ) ) x 100 (total hours of point source operation during reporting period)

* All time required for calibration and to perform preventative maintenance must be included in

COMS downtime.

Excess emissions include all time periods when emissions as measured by the CEMS exceed any applicable emission standard for any applicable time period.

Percent of time in compliance is to be determined as:

( 1 - (total hours of excess emissions during reporting period) ) x 100 (total hours of CEMS availability during reporting period)

PART 3 Complete a separate sheet for each polluta nt control device associated with a CEMS. Be specific when identifying control equipment opera ting parameters. For example: primary and secondary amps and spark rate for ESPs; pressure drop and effluent temperature for baghouses; and liquid flow rate and pH le vels for scrubbers. For the initial EER, include a diagram or schematic for each piece of control equipment.

Table I Use Table I as a guideline to report all excess emissions. Complete a separate sheet for each CEMS. Sequential numbering of each excess emission is recommended. For each excess emission, indicate: 1) time, duration and magn itude, 2) nature and cause, and 3) the action

taken to correct the condition of excess emissi ons. Do not use computer reason codes for corrective actions or nature and cause, rather, be specific in the explanation. If no excess emissions occur during the reporting period, it must be stated so.

Table II Use Table II as a guideline to report all CEMS upsets or malfunctions. Complete a separate sheet for each CEMS. List the time, duration, nature and extent of problems, as well as the action taken to return the CEMS to proper ope ration. Do not use reason codes for nature,

extent or corrective actions. Include normal calibrations and maintenance as prescribed by the CEMS manufacturer. Do not include zero and span checks.

Table III Complete a separate sheet for each polluta nt control device associated with a CEMS. Use Table III as a guideline to report operating stat us of control equipment during the excess emission. Follow the number sequence as recommended for excess emissions reporting. Report operating paramete rs consistent with Part 3, Subpart F.OP2035-02 E-8 Date of Decision: 11/24/09

Effective Date: 12/25/09 EXCESS EMISSIONS AND MONITORING SYSTEMS REPORT

PART 1

a. Emission Reporting Period ______________________________________________________

b. Report Date

___________________________________________________________________

c. Person Completing Report ______________________________________________________

d. Plant Name

____________________________________________________________________

e. Plant Location _________________________________________________________________

f. Person Responsible for Review and Integrity of Report

___________________________________________________________

g. Mailing Address for 1.f.

____________________
___________________ __________________ Street Address or P.O. Box

_____________________________________________________________________________ City State Zip Code

h. Phone Number of 1.f. ___________________________________________________________

i. Certification for Report Integrity, by person in 1.f.

THIS IS TO CERTIFY THAT THE INFORM ATION PROVIDED IN THIS REPORT IS

COMPLETE AND ACCURATE.

SIGNATURE

___________________________________________________________________

NAME

_________________________________________________________________________

TITLE

_________________________________________________________________________

DATE __________________________________________________________________

j. Comments

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________OP2035-02 E-9 Date of Decision: 11/24/09

Effective Date: 12/25/09 PART 2 - CEMS Information: Complete for each CEMS

.

a. Point Source __________________________________________________________

b. CEMS Type (circle one)

Opacity SO 2 NOx O 2 CO CO 2 TRS

c. Manufacturer __________________________________________________________

d. Model No. _____________________ e. Serial No. _______________________

e. Automatic Calibration Value: Zero _______________ Span ______________

f. Date of Last CEMS Performance Test ____________________________________

g. Total Time Point Source Operated During Reporting Period ______________

h. Percent of Time CEMS Was Available During Point Source Operation: _____

Show calculations ____________________________________________________

_______________________________________________________________________

i. Allowable Emission Rate _______________________________________________

j. Percent of Time in Compliance _________________________________________

Show calculations ____________________________________________________

_______________________________________________________________________

k. CEMS Repairs or Replaced Components Wh ich Affected or Altered Calibration Values

_______________________________________________________________________

_______________________________________________________________________

_______________________________________________________________________

_______________________________________________________________________

_______________________________________________________________________

_______________________________________________________________________

_______________________________________________________________________OP2035-02 E-10 Date of Decision: 11/24/09

Effective Date: 12/25/09 PART 3 - Pollution Control Equipment Operating Pa rameter Monitor. (Complete one sheet for each

pollutant control device associated with a CEMS.)

a. Point source _________________________________________________________

b. Pollutant (circle one):

Opacity Particulate SO 2 NOx TRS

c. Type of Control Equipment _____________________________________________

d. Control Equipment Description and Identification (Model # and Serial #)

_______________________________________________________________________

_______________________________________________________________________

_______________________________________________________________________

e. Control Equipment Operating Parame ters (i.e., pressure drop [delta P],

effluent temperature, scrubber water flow rate and pH levels, primary

and secondary amps, spark rate) _______________________________________

_______________________________________________________________________

_______________________________________________________________________

_______________________________________________________________________

f. Date of Control Equipment Performance Test ____________________________

g. Control Equipment Operating Para meter During Performance Test _________

_______________________________________________________________________

_______________________________________________________________________

_______________________________________________________________________

_______________________________________________________________________

h. Type and Amount of Material Produced or Processed During the Reporting

Period ________________________________________________________________

i. Type and Amount of Fuel Used During the Reporting Period ______________

_______________________________________________________________________OP2035-02 E-11 Date of Decision: 11/24/09

Effective Date: 12/25/09 TABLE I

EXCESS EMISSIONS 1

Time Explanation/

Date From To Duration Cause Magnitude Corrective Action

1 This should include the following:

1. Duration of excess emission in reporting period due to:

a. Startup/shutdown. b. Control equipment problems. c. Process problems.

d. Other known causes.

e. Unknown causes.

2. Total duration of excess emissions.

3. Total duration of excess emissions x (100) Total Source Operating TimeOP2035-02 E-12 Date of Decision: 11/24/09

Effective Date: 12/25/09 TABLE II

CONTINUOUS MONITORING SYSTEM OPERATION FAILURES 2

Time Problem/

Date From To Duration Cause Corrective Action

2 This shall include the following:

1. CMS downtime in reporting period due to:

a. Monitor equipment malfunctions. b. Non-Monitor equipment malfunctions. c. Quality assurance calibrations.

d. Other known causes.

e. Unknown causes.

2. Total CMS Downtime.

3. Total CMS downtime x 100 Total source operating timeOP2035-02 E-13 Date of Decision: 11/24/09

Effective Date: 12/25/09 TABLE III

CONTROL EQUIPMENT OPERATION DURING EXCESS EMISSIONS

Time Operating

Date From To Duration Parameters Corrective ActionOP2035-02 F-1 Date of Decision: 11/24/09

Effective Date: 12/25/09 APPENDIX F CAM PLAN – CIRCULATING FLUIDIZED BED BOILER, PARTICULATE

MATTER CONTROL

Monitoring Approach

I. Indicator Baghouse exit stream opacity and baghouse differential

pressure. II. Measurement Approach A Continuous Opacity Monitoring System (COMS) on the baghouse exit stream includes 1-hour average opacity readings which are recorded by the data acquisition system (DAS). In addition, the difference between the outlet pressures on the baghouse is monitored continuously on a paperless stripchart. Operators log the pressure differential hourly.

III. Indicator Value An opacity spike great er than 10 percent for longer than one hour duration triggers baghouse inspection, which may include a dye check to identify the damaged bag and bag replacement. The minimum accuracy of the pressure differential is 0.19 inches water pressure. Alarms on both opacity and pressure differential, the chart and local pressure gauges providing instantaneous readings. The opacity meter is calibrated daily and drift tests are conducted quarterly. Opacity is continuously monitored and recorded by the

DAS. Pressure differential is also monitored continuously on a paperless stripchart; additionally, readings are logged each hour. Data are stored in the plant archive for five

years. A COMS measures opacity continuously and the DAS records 6-minute averages. A stripchart records differential pressure continuously and opera tors log the values hourly. IV. Performance Criteria A. Data Representativeness

B. Verification of Operational Status

C. QA/QC Practices and Criteria

D. Monitoring Frequency

E. Data Collection Procedures

F. Averaging period Opacity – 1-hour averages. Differential pressure – daily.

Although the complete hard copy of Appendix G is not includ ed in the permit, the contents of Appendix G, CELP’s CAM plan remain as applicable requirements as stated in the Title V Operating Permit #OP2035-01. To receive a hard copy of this appendix, please contact one of the following:

The Department of Environmental Quality Permitting and Compliance Division

Air Resources Mana gement Bureau

1520 E. Sixth Ave.

P.O. Box 200901 Helena, Montana 59620-0901 Bureau Phone (406) 444-3490

OR

Colstrip Energy Limited Partnership 1087 W. River St., Suite 200 Boise, ID 83702 Phone (208) 344-3570OP2035-02 G-1 Date of Decision: 11/24/09

Effective Date: 12/25/09 APPENDIX G CAM PLAN – CIRCULATING FLUIDIZED BED BOILER, SULFUR DIOXIDE

CONTROL

Monitoring Approach

I. Indicator Exit stream SO 2 concentration II. Measurement Approach A CEMS on the boiler exit stream includes continuous SO 2 concentration readings which are used to control the amount

of limestone added.

III. Indicator Value The exit stream concentration is maintained at 0.59 lbs

SO 2 /MMBtu heat input.

Same measurement as used to meet emission limits.

CEMS data.

Daily calibration drift check of CEMS and quarterly cylinder gas audit.

Continuous.

CEMS automatically records exit stream concentrations. IV. Performance Criteria A. Data Representativeness

B. Verification of Operational Status

C. QA/QC Practices and Criteria

D. Monitoring Frequency

E. Data Collection Procedures

F. Averaging period 1 hour.

Although the complete hard copy of Appendix H is not included in the permit, the contents of Appendix H, CELP’s CAM plan remain as applicable requirements as stated in the Title V Operating Permit #OP2035-01. To receive a hard copy of this appendix, please contact one of the following:

The Department of Environmental Quality Permitting and Compliance Division Air Resources Management Bureau

1520 E. Sixth Ave.

P.O. Box 200901 Helena, Montana 59620-0901 Bureau Phone (406) 444-3490

OR

Colstrip Energy Limited Partnership 1087 W. River St., Suite 200 Boise, ID 83702 Phone (208) 344-3570OP2035-02 H-1 Date of Decision: 11/24/09

Effective Date: 12/25/09 APPENDIX H MEMS

MEMS

a. CELP shall install, calibrate, certify, maintain , and operate an MEMS to monitor and record the rate of mercury emissions discharged into th e atmosphere from all mercury emitting generating units (units) as defined in ARM 17.8.740.

(1) The MEMS shall be comprised of equipment as required in 40 CFR 75.81(a) and defined in

40 CFR 72.2.

(2) The MEMS shall conform to all applicable requirements of 40 CFR Part 75.

(3) The MEMS data will be used to demons trate compliance with the emission limitations

contained in Section II.A.22.

b. CELP shall prepare, maintain and submit a written MEMS Monitoring Plan to the Department.

(1) The monitoring plan shall contain sufficient information on the MEMS and the use of data derived from these systems to demonstrate that all the gaseous mercury stack emissions from each unit are monitored and reported.

(2) Whenever CELP makes a replacement, modifica tion, or change in a MEMS or alternative monitoring system under 40 CFR 75 subpart E, including a change in the automated data acquisition and handling system (DAHS) or in the flue gas handling system, that affects information reported in the monitoring plan (e.g . a change to a serial number for a component of a monitoring system), then the owner or operator shall update the monitoring plan.

(3) If any monitoring plan information requires an update pursuant to Section b.(2), submission of the written monitoring plan update shall be completed prior to or concurrent with the submittal of the quarterly report required in c. below for the quarter in which the update is required.

(4) The initial submission of the Monitoring Plan to the Department shall include a copy of a written Quality Assurance/Quality Control (QA/QC ) Plan as detailed in 40 CFR 75 Appendix B, Section 1. Subsequently, the QA/QC Plan need only be submitted to the Department when it is substantially revised. Substantial revisions can include items such as changes in QA/QC processes resulting from rule changes, modifi cations in the frequency or timing of QA/QC procedures, or the addition/deletion of equipment or procedures.

(5) The Monitoring Plan shall include, at a minimum, the following information:

(a) Facility summary including:

(i) A description of each mercury emitting generating unit at the facility.

(ii) Maximum and average loads (in megawatts (MW)) with fuels combusted and fuel flow rates at the maximum and average loads for each unit.

(iii) A description of each unit’s air pollution control equipment and a description of the physical characteristics of each unit’s stack.

(b) Mercury emission control summary including a description of control strategies, equipment, and design process rates.OP2035-02 H-2 Date of Decision: 11/24/09

Effective Date: 12/25/09 (c) MEMS description, including:

(i) Identification and description of each mon itoring component in the MEMS including manufacturer and model identifications; monitoring method descriptions; and normal operating scale and units descriptions. Descrip tions of stack flow, diluent gas, and moisture monitors (if used) in the system must be described in addition to the mercury monitor or monitors.

(ii) A description of the normal operating process for each monitor including a description of all QA/QC checks.

(iii) A description of the methods that will be employed to verify and maintain the accuracy and precision of the MEMS calibration equipment.

(iv) Identification and description of the DAHS, including major hardware and software components, conversion formulas, constant s, factors, averaging processes, and missing data substitution procedures.

(v) A description of all initial certification and ongoing recertification tests and frequencies; as well as all accuracy auditing tests and frequencies.

(d) The Maximum Potential Concentration (MPC), Maximum Expected Concentration (MEC), span value, and range value as app licable and as defined in 40 CFR 75 Appendix A, 2.1.7.

(e) Examples of all data re ports required in c. below.

c. CELP shall submit written, Quarterly Mercury Mo nitoring Reports. The reports shall be received by the Department within 30 days following the end of each calendar quarter, and shall include, at a minimum, the following:

(1) Mercury emissions. The reports shall include:

(a) The monthly average lb/TBtu mercury emission rate for each month of the quarter;

(b) The 12-month rolling average lb/TBtu emi ssion rate for each month of the reporting quarter. The rolling 12-month basis is an average of the last 12 individual calendar monthly averages, with each monthly average calculated at the end of each calendar month; and

(c) The total heat input to the boiler (in TBtu) for each 12-month rolling period of the

quarter.

(2) Mercury excess emissions. The report shall describe the magnitude of excess mercury emissions experienced during the quarter, including:

(a) The date and time of commencement and completion of each period of excess emissions.

Periods of excess emissions shall be define d as those emissions calculated on a rolling 12-month basis, which are greater than the limitation established in II.A.22.

(b) The nature and cause of each period of excess emissions and the corrective action taken or preventative measures adopted in response.(c) If no periods of excess mercury emissions we re experienced during the quarter, the report

shall state that information.

(3) MEMS performance. The report shall describe:

(a) The number of operating hours that the MEMS was unavailable or not operating within quality assurance limits (monitor downtime) during the reporting quarter, broken down by the following categories:

• Monitor equipment malfunctions;

• Non-Monitor equipment malfunctions;

• Quality assurance calibration;

• Other known causes; and

• Unknown causes.

(b) The percentage of unit operating time that the MEMS was unavailable or not operating within quality assurance limits (monitor dow ntime) during the reporting quarter. The percentage of monitor downtime in each calenda r quarter shall be calculated according to the following formula:



### 100 % × ⎟ ⎟ ⎠ ⎞ ⎜ ⎜ ⎝ ⎛

= OpHours urs MEMSDownHo

me MEMSDownti where

MEMSDowntime% = Percentage of unit operating hours classified as MEMS monitor downtime during the reporting quarter.

MEMSDownHours = Total number of hours of MEMS monitor downtime during the reporting quarter.

OpHours = Total number of hours the unit operated during the reporting quarter.

(c) For any reporting quarter in which mon itor downtime exceeds 10%, a description of each time period during which the MEMS was inoperative or operating in a manner defined in 40 CFR Part 75 as “out of control.” Each description must include the date, start and end times, total downtime (in hours), the reason fo r the system downtime, and any necessary

corrective actions that were taken. In add ition, the report shall describe the values used for any periods when missing data subs titution was necessary as detailed in 40 CFR 75.30, et seq

.

(4) The quarterly report shall include the results of any QA/QC audits, checks, or tests conducted to satisfy the requirements of 40 CFR Part 75 Appendices A, B or K.

(5) Compliance certification. Each quarterly report shall contain a certification statement signed by the facility’s responsible official based on reasonable inquiry of those persons with primary responsibility for ensuring that all of the unit's emissions are correctly and fully

monitored. The certification shall indicate:

OP2035-02 H-3 Date of Decision: 11/24/09

Effective Date: 12/25/09OP2035-02 H-4 Date of Decision: 11/24/09

Effective Date: 12/25/09 (a) Whether the monitoring data submitted were recorded in accordance with the applicable requirements of 40 CFR Part 75 including the QA/QC procedures and specifications of that part and its appendices, and any such re quirements, procedures and specifications of an applicable excepted or approved alternative monitoring method as represented in the approved Monitoring Plan.

(b) That for all hours where data are subs tituted in accordance with 40 CFR 75.38, the addon mercury emission controls we re operating within the range of parameters listed in the quality-assurance plan for the unit, and that the substitute values do not systematically underestimate mercury emissions.

(6) The format of each component of the quarterly report may be negotiated with the Department’s representative to accommodate the capabilities and formats of the facility’s

DAHS.

(7) Each quarterly report must be received by th e Department within 30 days following the endof each calendar reporting period (January-March, April-June, July-September, and OctoberDecember).

(8) The electronic data reporting detailed in 40 CFR Part 75 shall not be required unless Montana is able to receive and process data in an electronic format.

d. CELP shall maintain a file of all measurement s and performance testing results from the MEMS; all MEMS performance evaluations; all MEMS or mon itoring device calibration checks and audits; and records of all adjustments and maintenance performed on these systems or devices recorded in a permanent form suitable for inspection. The file shall be retained on site for at least 5 years following

the date of such measurements a nd reports. CELP shall make thes e records available for inspection by the Department and shall supply these records to the Department upon request.