May 16, 2011 

James M. Parker, PE

PPL Montana, LLC

JE Corette Steam Electric Station 

301 Charlene Street

Billings, Montana 59107

RE: Draft Title V Operating Permit #OP2953-06

Dear Mr. Parker:

The Department of Environmental Quality has prepared the enclosed Draft Operating Permit #OP2953-

06, for PPL Montana, LLC, JE Corette Steam Electric Station, located in Section 2, Township 1 South, 

Range 26 East, Yellowstone County, Montana. Please review the cover page of the attached permit for 

information pertaining to the action taking place on Permit #OP2953-06. 

If you have any questions, please contact Deanne Fischer, the permit writer, at (406) 444-3403 or by 

email at dfischer@mt.gov.

Sincerely,

Vickie Walsh

Air Permitting Program Supervisor

Air Resources Management Bureau

(406) 444-9741

 Deanne Fischer, PE

 Environmental Engineer

 Air Resources Management Bureau

 (406) 444-3403

VW: DF

Enclosure 

cc: Christopher Ajayi, US EPA Region VIII 8P-AR

Carson Coate, US EPA Region VIII, Montana Office

Stephen J. Christian, PPLM Montana, LLC, Alternative Responsible Official 

Tom Olson, PPLM Montana, LLC, Facility Contact Person
OP2953-06 i Draft: 05/16/2011

State of Montana

Department of Environmental Quality

Helena, Montana 59620

AIR QUALITY OPERATING PERMIT NUMBER OP2953-06

Renewal Application Received: April 16, 2010

Application Deemed Administratively Complete: May 17, 2010

Application Deemed Technically Complete: June 15, 2010

AFS Number: 030-111-0015A

Draft Issue Date: May 16, 2011

Proposed Issue Date: 

End of EPA 45-day Review: 

Date of Decision: 

Effective Date: 

Expiration Date: 

In accordance with the Montana Code Annotated (MCA) Sections 75-2-217 and 218, and the 

Administrative Rules of Montana (ARM) Title 17, Chapter 8, Subchapter 12, Operating Permit Program, 

ARM 17.8.1201, et seq.,

PPL Montana, LLC – JE Corette Steam Electric Station

Section 2, Township 1 South, Range 26 East, Yellowstone County, Montana

301 Charlene Street

Billings, MT 59107

hereinafter referred to as “PPLM”, is authorized to operate a stationary source of air contaminants 

consisting of the emissions units described in this permit. Until this permit expires, is modified, or 

revoked, PPLM is allowed to discharge air pollutants in accordance with the conditions of this permit. 

All conditions in this permit are federally and state enforceable unless otherwise specified. Requirements 

that are only state enforceable are identified in the permit. A copy of this permit must be kept on site at 

the above-named facility.

Permit Issuance and Appeal Processes: In accordance with ARM 17.8.1232, the Department of 

Environmental Quality (Department) is providing a 30-day public comment period from May 16, 2011 to 

June 15, 2011, to accept comments on this draft permit. Any member of the public, including 

representatives of the facility, desiring to comment on this draft permit must submit all comments to the 

Department by June 15, 2011, to be considered. Comments may address the Department analysis and 

determination or information submitted by the applicant. A public hearing regarding issuance of this 

permit may be requested by submitting a written request to the Department within the public comment 

period. The Department intends to issue the proposed operating permit after the comment period has 

expired and after any required public hearing. The proposed permit will be sent to the United States 

Environmental Protection Agency (EPA). The EPA is allowed a 45-day comment period on the proposed 

permit. After the EPA comment period has expired, the Department intends to issue a decision on the 

permit. In accordance with Section 75-2-218, MCA, the Department’s decision regarding issuance of the 

permit is not effective until 30 days have elapsed from the date of the decision. The decision may be 

appealed to the Board of Environmental Review (Board) by filing a request for a hearing within 30 days 

after the date of decision. For more information please contact the Department at (406) 444-3490.
OP2953-06 ii Draft: 05/16/2011

Montana Air Quality Operating Permit

Department of Environmental Quality

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

SECTION II. SUMMARY OF EMISSIONS UNITS ............................................................................2

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

A. FACILITY-WIDE ................................................................................................................................. 3

B. EU1 – PROTOCOL ASH HANDLING SYSTEM...................................................................................... 6

C. EU2 – AUXILIARY BOILER ................................................................................................................ 8

D. EU3 – COAL HANDLING SYSTEM ...................................................................................................... 9

E. EU4 – COAL STORAGE PILES – ACTIVE AND RESERVE (WIND EROSION) ...................................... 11

F. EU5 – GASOLINE STORAGE TANK................................................................................................... 12

G. EU6 – INTERNAL COMBUSTION ENGINES (VEHICLES).................................................................... 13

H. EU7 – J.E. CORETTE BOILER........................................................................................................... 14

I. EU8 – PLANT ROADS....................................................................................................................... 20

J. EU9 – EMERGENCY DIESEL GENERATORS...................................................................................... 21

K. EU10 – DIESEL TANK ...................................................................................................................... 23

L. EU11 – MERCURY OXIDIZER/SORBENT HANDLING SYSTEM.......................................................... 23

SECTION IV. NON-APPLICABLE REQUIREMENTS....................................................................26

A. FACILITY-WIDE ............................................................................................................................... 26

B. EMISSIONS UNITS ............................................................................................................................ 28

SECTION V GENERAL PERMIT CONDITIONS...........................................................................32

A. COMPLIANCE REQUIREMENTS......................................................................................................... 32

B. CERTIFICATION REQUIREMENTS ..................................................................................................... 32

C. PERMIT SHIELD................................................................................................................................ 33

D. MONITORING, RECORDKEEPING, AND REPORTING REQUIREMENTS............................................... 34

E. PROMPT DEVIATION REPORTING..................................................................................................... 35

F. EMERGENCY PROVISIONS................................................................................................................ 35

G. INSPECTION AND ENTRY.................................................................................................................. 36

H. FEE PAYMENT.................................................................................................................................. 36

I. MINOR PERMIT MODIFICATIONS ..................................................................................................... 37

J. CHANGES NOT REQUIRING PERMIT REVISION ................................................................................ 37

K. SIGNIFICANT PERMIT MODIFICATIONS............................................................................................ 38

L. REOPENING FOR CAUSE .................................................................................................................. 38

M. PERMIT EXPIRATION AND RENEWAL............................................................................................... 39

N. SEVERABILITY CLAUSE ................................................................................................................... 39

O. TRANSFER OR ASSIGNMENT OF OWNERSHIP................................................................................... 39

P. EMISSIONS TRADING, MARKETABLE PERMITS, ECONOMIC INCENTIVES........................................ 40

Q. NO PROPERTY RIGHTS CONVEYED.................................................................................................. 40

R. TESTING REQUIREMENTS ................................................................................................................ 40

S. SOURCE TESTING PROTOCOL .......................................................................................................... 40

T. MALFUNCTIONS............................................................................................................................... 40

U. CIRCUMVENTION ............................................................................................................................. 40

V. MOTOR VEHICLES ........................................................................................................................... 40

W. ANNUAL EMISSIONS INVENTORY .................................................................................................... 40

X. OPEN BURNING................................................................................................................................ 40

Y. MONTANA AIR QUALITY PERMITS (MAQP)................................................................................... 41

Z. NATIONAL EMISSION STANDARD FOR ASBESTOS ........................................................................... 41

AA. ASBESTOS ........................................................................................................................................ 41
OP2953-06 iii Draft: 05/16/2011

BB. STRATOSPHERIC OZONE PROTECTION – SERVICING OF MOTOR VEHICLE AIR CONDITIONERS ..... 42

CC. STRATOSPHERIC OZONE PROTECTION – RECYCLING AND EMISSIONS REDUCTIONS...................... 42

DD. EMERGENCY EPISODE PLAN............................................................................................................ 42

EE. DEFINITIONS .................................................................................................................................... 42

APPENDIX A INSIGNIFICANT EMISSIONS 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 OPACITY CEMS .........................................................................................................E-1

APPENDIX F SO2 CEMS ..................................................................................................................... F-1

APPENDIX G NOX CEMS...................................................................................................................G-1

APPENDIX H ACID RAIN...................................................................................................................H-1

APPENDIX I SO2 SIP............................................................................................................................I-1

APPENDIX J OPERATION MODIFICATION PLAN-REVISION 4 .............................................J-1

APPENDIX K COMPLIANCE ASSURANCE MONITORING (CAM) PLAN..............................K-1

APPENDIX L MERCURY EMISSIONS MONITORING SYSTEM (MEMS) ..............................L-1
OP2953-06 1 Draft: 05/16/2011

Terms not otherwise defined in this permit or in the Definitions and Abbreviations 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: PPL Montana, LLC (PPLM)

Mailing Address: P.O. Box 38

City: Colstrip State: MT Zip: 59323 

Plant Name: JE Corette Steam Electric Station

Plant Location: Section 2, Township 1South, Range 26East, Yellowstone County, Montana

301 Charlene Street, Billings, Montana

Plant Mailing Address: P.O. Box 30495, Billings, MT 59107

Responsible Official: James M. Parker Phone: (406) 237-6900 

Alternative Responsible Official: Stephen J. Christian Phone: (406) 748-5019 

Facility Contact Person: Tom Olson Phone: (406) 896-4704

Facility Technical Contact: Stephen J. Christian Phone: (406) 748-5019 

Primary SIC Code: 4911, Electric Services (NAICS Code: 221112)

Nature of Business: Coal-fired thermal power generation

Description of Process: A tangential coal-fired boiler and associated equipment for generation of 

electricity.
OP2953-06 2 Draft: 05/16/2011

SECTION II. SUMMARY OF EMISSIONS UNITS

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

Emissions 

Unit ID Description Pollution Control Device/Practice

EU1 Ash Handling System

Dust collection equipment: dustless ash 

loading system, or contained railcars and 

trucks

EU2 Auxiliary Boiler None

EU3 Coal Handling System Water on Conveyor No. 3; covered conveyors, 

telescopic chute; or dust collectors

EU4 Coal Storage Piles None

EU5 Gasoline Storage Tank None

EU6 Internal Combustion Engines None

EU7 J.E. Corette Boiler Electrostatic Precipitator

EU8 Plant Roads Washed and cleaned

EU9 Process Ponds Wet material

EU10 Diesel Tank None

EU11 Mercury Oxidizer/Sorbent Handling System Bin Vent Filter
OP2953-06 3 Draft: 05/16/2011

SECTION III. PERMIT CONDITIONS

The following requirements and conditions are applicable to the facility or to specific emissions 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 OrE= 1.026 * H-0.233

A.8 ARM 17.8.310 Particulate Matter, Industrial 

Processes Particulate Matter E= 4.10 * P0.67 orE= 55 * P0.11- 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 Plan Submittal

A.15 ARM 17.8.1211(1)(c) 

and 40 CFR Part 98

Greenhouse Gas Reporting Reporting -------

A.16 SIP SIP Sulfur Bearing Gases

A.17 ARM 17.8.1212 Reporting Requirements Prompt Deviation Reporting -------

A.18 ARM 17.8.1212 Reporting Requirements Compliance Monitoring -------

A.19 ARM 17.8.1207 Reporting Requirements Annual Certification -------

Conditions

A.1. Pursuant to ARM 17.8.105, any person or persons 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 tests, emission or ambient, for such periods of time as may be necessary using methods 

approved by the Department.

Compliance demonstration frequencies that list “as required by the Department” refer to ARM 

17.8.105. In addition, for such sources, compliance with limits and conditions listing “as required 

by the Department” as the frequency, is verified annually using emission factors and engineering 
OP2953-06 4 Draft: 05/16/2011

calculations by the Department’s compliance inspectors 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), PPLM 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 consecutive minutes unless otherwise specified by 

rule or in this permit.

A.3. Pursuant to ARM 17.8.304(2), PPLM shall not cause or authorize emissions to be discharged into 

the outdoor atmosphere from any source installed after 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), PPLM 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), PPLM 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, PPLM shall not operate a construction site or demolition project 

unless reasonable precautions are taken to control emissions 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 specified by rule or in this permit, PPLM shall not 

cause or authorize particulate matter caused by the 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 equipment and new fuel burning equipment calculated 

using the following equations:

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

E =0.882 * H-0.1664

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

E =1.026 * H-0.233

Where H is the heat input capacity in million British Thermal Units (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 specified by rule or in this permit, PPLM shall not 

cause or authorize particulate matter to be discharged 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*P0.67

For process weight rates in excess of 30 tons per hour: E = 55.0*P0.11– 40

Where E = rate of emissions in pounds per hour and P = process weight rate in tons per hour.
OP2953-06 5 Draft: 05/16/2011

A.9. Pursuant to ARM 17.8.322(4), PPLM shall not burn liquid or solid fuels containing sulfur in 

excess of one (1) pound per MMBtu fired, unless otherwise specified by rule or in this permit. 

This rule shall be interpreted to allow for a daily deviation of 0.1 pound of sulfur per million BTU 

fired. The rule shall be interpreted to allow the blending of all fuels burned in a plant during a 

given time period in determining the aggregate sulfur content for purposes of the rule, and it shall 

not be construed to require blending or physical mixing of fuels at any given furnace or heater 

within the plant complex. (April, 1978 Billings/Laurel Plan that included the Board of Health 

and Environmental Sciences Order).

A.10. Pursuant to ARM 17.8.322(5), PPLM 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), PPLM 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 ARM 17.8.324(1), unless otherwise specified by rule 

or in this permit.

A.12. Pursuant to ARM 17.8.324, unless otherwise specified by rule or in this permit, PPLM shall not 

place, store or hold in any stationary tank, reservoir or other container of more than 65,000 gallon 

capacity any crude oil, gasoline or petroleum distillate having a vapor pressure 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 working 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 specified by rule or in this permit, PPLM shall not 

use any compartment of any single or multiple-compartment 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, constructed 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, PPLM shall submit to the Department a copy of any 

startup, shutdown, and malfunction (SSM) plan required 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 Emission Standard for Hazardous Air Pollutants 

(NESHAPs) or Maximum Achievable Control Technology (MACT) standard, and within 30 days 

of the revision of any such SSM plan, when applicable. The Department requests submittal of 

such plans in electronic form, when possible.

A.15. Pursuant to ARM 17.8.1211(1)(c) and 40 CFR Part 98, PPLM shall comply with requirements of 

40 CFR Part 98 – Mandatory Greenhouse Gas Reporting, as applicable (ARM 17.8.1211(1)(c), 

NOT an applicable requirement under Title V). 

A.16. PPLM shall utilize appropriate maintenance, repair, and operating practices to control emissions 

of sulfur bearing gases from minor sources such as ducts, stacks, valves, vents, vessels, and 

flanges that are not otherwise covered in the SO2 SIP Appendix. This condition became effective 

March 4, 1998. (Board of Environmental Review Order signed August 19, 1996). This 

requirement is "State Only" until approval of the SIP by the U.S. Environmental Protection 

Agency
OP2953-06 6 Draft: 05/16/2011

A.17. PPLM shall promptly report deviations from permit requirements including those attributable to 

upset conditions, as upset is defined in the permit. To be considered prompt, deviations shall be 

reported to the Department using the schedule and content as described in Section V.E (unless 

otherwise specified in an applicable requirement) (ARM 17.8.1212).

A.18. On or before February 15 and August 15 of each year, PPLM 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, PPLM may submit a single 

report, provided that it contains all the information 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, 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.”

A.19. By February 15 of each year, PPLM shall submit to the Department the compliance certification 

required by Section V.B. The annual certification required by Section V.B must include a 

statement of compliance based on the information available which identifies any observed, 

documented or otherwise known instance 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 contain 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. EU1 – Protocol Ash Handling System

Condition(s) Pollutant/

Parameter Permit Limit Compliance Demonstration Reporting 

Method Frequency Requirements

B.1., B.4., 

B.8., B.11., 

B.12., B.13

Opacity 20% Visual Survey/

Method 9 Bi-monthly Semiannual

B.2., B.5., 

B.6., B.9., 

B.12., B.13 

Opacity Reasonable 

Precautions

Use of enclosed 

trucks or use of

dustless ash 

loading system

When ash is 

being unloaded Semiannual

B.3., B.7., 

B.10., B.12., 

B.13

Opacity 40% Operation of 

Bag Filters

When ash 

handling system 

is operating

Semiannual
OP2953-06 7 Draft: 05/16/2011

Conditions

B.1. PPLM may not cause or authorize emissions to be discharged into the outdoor atmosphere from 

any source that exhibits an opacity of 20% or greater averaged over 6 consecutive minutes (ARM 

17.8.304(2)). 

B.2. PPLM shall not cause or authorize the production, handling, transportation, or storage of any 

material unless reasonable precautions to control emissions of airborne particulate matter are 

taken (ARM 17.8.308).

B.3. PPLM shall not cause or authorize emissions to be discharged into the outdoor atmosphere from 

any baghouse, bag filter, or bin vent associated with the ash handling system that exhibit opacity 

of 40% or greater averaged over 6 consecutive minutes (ARM 17.8.304).

Compliance Demonstration

B.4. PPLM shall conduct either a semiannual Method 9 source test or a weekly visual survey of visible 

emissions on the Ash Handling System. Under the visual survey option, once per calendar week, 

during daylight hours, PPLM shall visually survey the Ash Handling System for any visible 

emissions. If visible emissions are observed during the visual survey, PPLM must conduct a 

Method 9 source test. The Method 9 source test must begin within one hour of any observation of 

visible emissions. If visible emissions meet or exceed 15% opacity based on the Method 9 source 

test, PPLM shall immediately take corrective action to contain or minimize the source of 

emissions. If corrective actions are taken, then PPLM shall immediately conduct a subsequent 

visual survey (and subsequent Method 9 source test if visible emissions remain) to monitor 

compliance. The person conducting the visual survey shall record the results of the survey 

(including the results of any Method 9 source test performed) in a log, including any corrective 

action taken. Conducting a visual survey does not relieve PPLM of the liability for a violation 

determined using Method 9 (ARM 17.8.101(27)). 

If the visual surveys are not performed once per calendar week as specified above during the 

reporting period, then PPLM shall perform the Method 9 source tests on the Ash Handling 

System for that reporting period. 

Method 9 source tests must be performed in accordance 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 is 20% or greater, 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).

B.5. When loading ash into an enclosed truck or enclosed railcar, PPLM shall use an appropriate 

method of conveying (e.g., pneumatic transfer, dustless slide, etc.) the ash to control fugitive dust 

(ARM 17.8.1213).

B.6. When loading ash to an open truck or open railcar, PPLM shall apply water to the ash prior to 

load-out. A load-out chute with an intact skirt shall be used for loading all open railcars and open 

trucks (ARM 17.8.1213).

B.7. A fabric filter control shall be used to contain dust from the loading and unloading of each of the 

following tanks: 2,000-ton tank, 1,500-ton tank, and 300-ton tank (ARM 17.8.1213).
OP2953-06 8 Draft: 05/16/2011

Recordkeeping

B.8. All compliance source test recordkeeping shall be performed in accordance with the test method 

used, and the Montana Source Test Protocol and Procedures Manual and shall be maintained on 

site. If Method 9 tests are conducted, the test reports must be maintained on site and must be 

submitted to the Department upon request. If visual surveys are performed, PPLM shall maintain 

a log to verify the visual surveys were performed, as specified in Section III.B.4. Each log entry 

must include the date, time, results of survey (and results of subsequent Method 9 tests, if 

applicable), and observer’s initial. Whether visual surveys or Method 9 tests are conducted, if 

any corrective action is required, the time, date, observer’s initials, and any preventative or 

corrective action taken must be recorded in the log (ARM 17.8.106 and ARM 17.8.1212). 

B.9. PPLM shall maintain on site a log of the date and time when enclosed trucks, water, and load-out 

chute skirt were not used while the emissions unit was operating. The log must include the 

reason the method of controlling was not operated and the type of truck or railcar loaded (ARM 

17.8.1212).

B.10. PPLM shall maintain on site a log of the date and time when bag filters were not operated while 

the emissions unit was operating. The log must include the reason the bag filters were not in 

operation (ARM 17.8.1212).

Reporting

B.11. Any compliance source test reports must be submitted in accordance with the Montana Source 

Test Protocol and Procedures Manual (ARM 17.8.106 and ARM 17.8.1212).

B.12. The annual compliance certification required by Section V.B must contain a certification 

statement for the above applicable requirements (ARM 17.8.1212). 

B.13. The semiannual monitoring report shall provide (ARM 17.8.1212):

a. a summary of any visual surveys and corrective actions taken, and the results of any 

Method 9 tests that were performed and logged during that semiannual period as 

specified by Section III.B.4 and III.B.8

b. a summary of the log of when and why water and/or the load-out chute skirt were not 

used while emissions units were operating during that semiannual period as specified by 

Section III.B.6 and III.B.9.

c. a summary of the log of when and why the bag filters were not operated while emissions 

units were operating during that semiannual period as specified by Section III.B.7 and 

III.B.10.

C. EU2 – Auxiliary Boiler

Condition(s) Pollutant/

Parameter Permit Limit Compliance DemonstrationMethod Frequency

Reporting 

Requirements

C.1., C.4., 

C.5., C.6., 

C.7

Opacity 20% Pipeline Quality 

Natural Gas Ongoing Semiannual

C.2., C.4.,

C.5., C.6., 

C.7

PM 0.459 lb/mmBtu Pipeline Quality 

Natural Gas Ongoing Semiannual

C.3., C.4., 

C.5., C.6., 

C.7

Sulfur in 

fuel

50 grains of sulfur/100 

cubic feet of gaseous fuel

Pipeline Quality 

Natural Gas Ongoing Semiannual
OP2953-06 9 Draft: 05/16/2011

Conditions

C.1. PPLM may not cause or authorize to be discharged into the atmosphere from the boiler, when in 

operation, visible emissions that exhibit an opacity of 20% or greater, unless specified elsewhere 

in this permit (ARM 17.8.304 and ARM 17.8.752).

C.2. When the boiler is in operation, particulate matter emissions from the boiler shall not exceed 

0.459 lb/MMBtu (ARM 17.8.752).

C.3. PPLM shall not fire in the boiler liquid or solid fuels containing sulfur in excess of 50 grains of 

sulfur/100 cubic feet of gaseous fuel (ARM 17.8.322).

Compliance Demonstration

C.4. PPLM shall burn pipeline quality natural gas in the auxiliary boiler while in operation to monitor 

compliance with the limits in Section III.C.1, III.C.2, and III.C.3 (ARM 17.8.1213).

Recordkeeping

C.5. PPLM shall maintain on site copies of the supplier’s fuel analysis for each fuel delivery. The 

analysis may be based on an average fuel produced over a period of time (ARM 17.8.1212).

Reporting

C.6. The annual compliance certification required by Section V.B must contain a certification 

statement for the above applicable requirements (ARM 17.8.1212).

C.7. The semiannual monitoring report shall provide certification that pipeline quality natural gas was 

used in the boiler (ARM 17.8.1212).

D. EU3 – Coal Handling System

Condition Pollutant/ 

Parameter

Permit 

Limit

Compliance Demonstration

Method Frequency

Reporting 

Frequency

D.1., D.5., D.9., 

D.11., D.12., D.13 Opacity 20% Visual Survey/Method 9 Bi-monthly Semiannual

D.2., D.6., D.10., 

D.11., C.12., D13 Opacity Reasonable Precautions

Use of telescopic 

spout Ongoing Semiannual

D.3., D.7., D.10., 

D.11., D.12., D.13 Opacity 40% Operation of bag filters Ongoing Semiannual

D.4., D.8., D.9., 

D.11., D.12., D.13 PM E=55 * p0.11- 40 Method 5

As required by the 

Department and 

Section III.A.1

Annual

Conditions

D.1. PPLM may shall not cause or authorize emissions from the Coal Handling Systems and Coal 

Piles to be discharged into the outdoor atmosphere that exhibit an opacity of 20% or greater 

averaged over 6 consecutive minutes (ARM 17.8.304(2)).

D.2. PPLM 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)).
OP2953-06 10 Draft: 05/16/2011

D.3. PPLM shall not cause or authorize emissions to be discharged into the outdoor atmosphere from 

any baghouse, bag filter, or bin vent associated with coal handling system that exhibit opacity of 

40% or of greater (ARM 17.8.304).

D.4. The particulate emissions from process weight shall not exceed the value calculated using E = 

55.0 * P0.11– 40, where E = emissions in pounds per hour and P = process weight rate in tons per 

hour (ARM 17.8.310).

Compliance Demonstration

D.5. PPLM shall conduct either a semiannual Method 9 source test or a weekly visual survey of visible 

emissions on the coal handling system. Under the visual survey option, once per calendar week, 

during daylight hours, PPLM shall visually survey the coal handling system for any visible 

emissions. If visible emissions are observed during the visual survey, PPLM must conduct a 

Method 9 source test. The Method 9 source test must begin within one hour of any observation of 

visible emissions. If visible emissions meet or exceed 15% opacity based on the Method 9 source 

test, PPLM shall immediately take corrective action to contain or minimize the source of 

emissions. If corrective actions are taken, then PPLM shall immediately conduct a subsequent 

visual survey (and subsequent Method 9 source test if visible emissions remain) to monitor 

compliance. The person conducting the visual survey shall record the results of the survey 

(including the results of any Method 9 source test performed) in a log, including any corrective 

action taken. Conducting a visual survey does not relieve PPLM of the liability for a violation 

determined using Method 9 (ARM 17.8.101(27)). 

If the visual surveys are not performed once per calendar week as specified above during the 

reporting period, then PPLM shall perform the Method 9 source tests on the coal handling system

for that reporting period. 

Method 9 source tests must be performed in accordance 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 is 20% or greater, 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).

D.6. PPLM shall use a load-out chute with telescopic spout during loading and unloading of coal 

(ARM 17.8.1213).

D.7. A fabric filter control shall be used to contain dust when transferring coal to the silos (ARM 

17.8.1213).

D.8. As required by the Department and Section III.A.1, PPLM shall conduct a Method 5 test to 

comply with the limit according to Section III.D.4 (ARM 17.8.1213).

Recordkeeping

D.9. All compliance source test recordkeeping shall be performed in accordance with the test method 

used and the Montana Source Test Protocol and Procedures Manual. If Method 9 tests are 

conducted, the test reports must be maintained on-site and must be submitted to the Department 

upon request. If visual surveys are performed, PPLM shall maintain a log to verify that the visual 

surveys were performed as specified in Section III.D.5. Each log entry must include the date, 

time, results of survey, (and results of subsequent Method 9, if applicable) and observer’s initials. 

If any corrective action is required, the time, date, observer’s initials, and any preventive or 

corrective action taken must be recorded in the log (ARM 17.8.106 and ARM 17.8.1212).
OP2953-06 11 Draft: 05/16/2011

D.10. A log shall be kept including the date and time when a fabric filter control and a telescopic spout 

for unloading and transferring coal were not operated while the emissions units were operating. 

The log must include the reason the method of control was not in operation (ARM 17.8.1212).

Reporting

D.11. Any compliance source test reports must be submitted in accordance with the Montana Source 

Test Protocol and Procedures Manual (ARM 17.8.106 and ARM 17.8.1212).

D.12. The annual compliance certification required by Section V.B must contain a certification 

statement for the above applicable requirements (ARM 17.8.1212).

D.13. The semiannual monitoring report shall provide (ARM 17.8.1212): 

a. A summary of the visual surveys and any corrective action taken, and the results of

Method 9 tests performed and logged during that semiannual period as specified by 

Section III.D.5 and III.D.9; 

b. Summary of the log of when and why the filter fabric control and telescopic spout were 

not used while emissions units were operating during that semiannual period as specified 

by Section III.D.6, III.D.7, and, III.D.10. 

c. Summary of the results of any required Method 5 tests that were conducted during that 

semiannual period as required by Section III.D.8. 

E. EU4 – Coal Storage Piles – Active and Reserve (Wind Erosion)

Condition(s) Pollutant/

Parameter

Permit 

Limit

Compliance Demonstration

Method Frequency

Reporting 

Frequency

E.1., E.3., E.4., 

E 5., E.6., E.7 Opacity 20%

Visual Survey/ 

Method 9 Bi-monthly Semi-Annual

E.2., E.3., E.4., 

E.5., E.6. , E.7

Reasonable 

Precautions Ongoing Annual

Conditions

E.1. PPLM may not cause or authorize the emissions from the Coal Piles to be discharged into the 

outdoor atmosphere that exhibit an opacity of 20% or greater averaged over 6 consecutive 

minutes (ARM 17.8.304(2)).

E.2. PPLM 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).

Compliance Demonstration

E.3. PPLM shall conduct either a semiannual Method 9 source test or a weekly visual survey of visible 

emissions on coal storage piles. Under the visual survey option, once per calendar week, during 

daylight hours, PPLM shall visually survey coal storage piles for any visible emissions. If visible 

emissions are observed during the visual survey, PPLM must conduct a Method 9 source test. The 

Method 9 source test must begin within one hour of any observation of visible emissions. If 

visible emissions meet or exceed 15% opacity based on the Method 9 source test, PPLM shall 
OP2953-06 12 Draft: 05/16/2011

immediately take corrective action to contain or minimize the source of emissions. If corrective 

actions are taken, then PPLM shall immediately conduct a subsequent visual survey (and 

subsequent Method 9 source test if visible emissions remain) to monitor compliance. The person 

conducting the visual survey shall record the results of the survey (including the results of any 

Method 9 source test performed) in a log, including any corrective action taken. Conducting a 

visual survey does not relieve PPLM of the liability for a violation determined using Method 9 

(ARM 17.8.101(27)). 

If the visual surveys are not performed once per calendar week as specified above during the 

reporting period, then PPLM shall perform the Method 9 source tests on coal storage piles for that 

reporting period. 

Method 9 source tests must be performed in accordance 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 is 20% or greater, 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).

Recordkeeping

E.4. All compliance source test recordkeeping shall be performed in accordance with the the test 

method used, and the Montana Source Test Protocol and Procedures Manual. If Method 9 tests 

are conducted, the test reports must be maintained on-site and must be submitted to the 

Department upon request. If visual surveys are performed, PPLM shall maintain a log to verify 

that the visual surveys were performed as specified in Section III.E.3. Each log entry must 

include the date, time, results of survey (and results of subsequent Method 9, if applicable), and 

observer’s initials. Whether visual surveys or Method 9 test are conducted, if any corrective 

action is required, the time, date, observer’s initials, and any preventative or corrective action 

taken must be recorded in the log (ARM 17.8.106 and ARM 17.8.1212).

Reporting

E.5. Any compliance source test reports must be submitted in accordance with the Montana Source 

Test Protocol and Procedures Manual (ARM 17.8.106 and ARM 17.8.1212).

E.6. The annual compliance certification required by Section V.B must contain a certification 

statement for the above applicable requirements (ARM 17.8.1212).

E.7. The semiannual report shall provide a summary of the visual surveys and any corrective action 

taken, and the results of any Method 9 tests performed and logged during that semiannual period 

as specified by Section III.E.3 and III.E.4.

F. EU5 – Gasoline Storage Tank

Condition(s) Pollutant/

Parameter

Permit 

Limit

Compliance Demonstration

Method Frequency

Reporting 

Requirements

F.1., F.2., 

F.3., F.4., F.5.

Underground 

gasoline tank

250 gallons 

or > 

gasoline in 

tank

Submerged fill 

pipe, unless tank is 

equipped with a 

vapor loss control 

device or is a 

pressure tank

Ongoing/when 

unloading Semiannual

Conditions
OP2953-06 13 Draft: 05/16/2011

F.1. PPLM 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 (ARM 

17.8.324(3)).

Compliance Demonstration

F.2. PPLM shall use a submerged fill pipe during the loading of gasoline into any stationary tank 

unless the tank is equipped with a vapor loss control device or is a pressure tank as required in 

section III.F.1 (ARM 17.8.749 and ARM 17.8.1213).

Recordkeeping

F.3. PPLM shall maintain on site a log to monitor continuous use of the submerged fill pipe by 

maintaining a log of tank loading. The log shall include the date and time of loading (ARM 

17.8.1212).

Reporting

F.4. The annual compliance certification required by Section V.B must contain a certification 

statement for the above applicable requirements (ARM 17.8.1212).

F.5. The semiannual report shall provide a summary of the log of the gasoline storage tank loading 

during that semiannual period as specified in Section III.F.2 and III.F.3 (ARM 17.8.1212).

G. EU6 – Internal Combustion Engines (Vehicles)

Condition(s) Pollutant/

Parameter Permit Limit Compliance DemonstrationMethod Frequency

Reporting

Requirements

G.1., G.4., G.7., 

G.9., G.10., 

G.11

Opacity 20% Method 9

As required by the 

Department and 

Section III.A.1

Semiannual

G.2., G.5., G.8., 

G.10., G.11 PM E = 1.026 * H0.233

Burning low 

sulfur fuel Ongoing Semiannual

G.3.,G.6., G.8., 

G.10., G.11 Sulfur in Fuel 1lb of sulfur/MMBtu

Operational 

Log Ongoing Semiannual

Conditions

G.1. PPLM may not cause or authorize emissions to be discharged into the outdoor atmosphere from 

any source that exhibits an opacity of 20% or greater averaged over 6 consecutive minutes (ARM 

17.8.304(2)).

G.2. PPLM shall not cause or authorize particulate matter caused by the combustion of fuel to be 

discharged from any stack or chimney into the outdoor atmosphere in excess of E = 1.026 * H–

0.233 for existing fuel burning equipment, where H = heat input capacity in MMBtu/hr and E is the 

maximum allowable emission rate in lb/MMBtu (ARM 17.8.309). 

G.3. PPLM shall not fire any liquid or solid fuels containing sulfur in excess of 1lb sulfur/MMBtu 

(ARM 17.8.322).
OP2953-06 14 Draft: 05/16/2011

Compliance Demonstration

G.4. As required by the Department and Section III.A.1, PPLM shall perform a Method 9 test in 

accordance with the Montana Source Test Protocol and Procedures Manual (ARM 17.8.106 and 

ARM 17.8.1213).

G.5. PPLM shall burn low sulfur fuel to monitor compliance with the condition in Section III.G.2 

(ARM 17.8.106 and ARM 17.8.1212).

G.6. Compliance with the limits in Section III.G.3 can be monitored by maintaining a log of the sulfur 

content of the fuel used (ARM 17.8.1213).

Recordkeeping

G.7. All compliance source test recordkeeping shall be performed in accordance with the test method 

used and the Montana Source Test Protocol and Procedures Manual (ARM 17.8.106 and ARM 

17.8.1212).

G.8. PPLM shall maintain on site a log as described in Section III.G.6. PPLM shall include in that log 

the fuel type used and verification that the sulfur in fuel does not exceed the limit in Section 

III.G.3 (ARM 17.8.1212).

Reporting

G.9. All source test recordkeeping shall be performed in accordance with the test method used and the 

Montana Source Test Protocol and Procedures Manual (ARM 17.8.106 and ARM 17.8.1212).

G.10. The annual compliance certification required by Section V.B must contain a certification 

statement for the above applicable requirements (ARM 17.8.1212).

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

a. A summary of the results of any Method 9 test performed and logged as specified by 

Section III.G.4 and III.G.7; and,

b. A summary of the log of the fuel type used and verification that the sulfur in fuel did not 

exceed the limit as specified in Section III.G.5, and III.G.8

H. EU7 – J.E. Corette Boiler

Condition(s) Pollutant/

Parameter Permit Limit Compliance Demonstration Reporting 

Method Frequency Requirements

H.1., H.18., 

H.21., H.31., 

H.32., H.40., 

H.43.,H.46., 

H.47

Opacity 40%

CEMS Ongoing Quarterly

Method 9

As required by 

the 

Department 

and Section 

III.A.1

Semiannual

H.2., H.19., 

H.21., H.32., 

H.43., H.46., 

H.47

Opacity

23%(1-hour 

average) CEMS Ongoing Quarterly

17%(24-hour 

average) CEMS Ongoing Quarterly

H.3., H.4., 

H.20., H.31., 

H.40., H.46., 

H.47

PM

E=0.882*H-0.1664

Method 5 or 

5B Semiannual 0.26 Semiannual

lb/mmBtu
OP2953-06 15 Draft: 05/16/2011

H.5., H.21., 

H.33., H.46., 

H.47

Sulfur in Fuel 1lb of sulfur/ 

mmBtu CEMS Ongoing Quarterly

H.6., H.23., 

H.35., H.46., 

H.47

Sulfur in Fuel

50 grains of 

sulfur/100 cubic 

feet of gaseous 

fuel

Combustion of 

Natural Gas or 

Propane

Semiannual Semiannual

H.7., H.21., 

H.25., H.33.,

H.36., H.45., 

H.46., H.47

SO2

9,999,000 

lb/calendar year CEMS and SIP Ongoing Quarterly

H.8., H.21., 

H.25., H.33., 

H.36., H.45., 

H.46., H.47

SO2

Calculated Limit 

Three Hour 

Emission 

Limitation

CEMS and SIP Ongoing Quarterly

H.9., H.21., 

H.26., H.33., 

H.36., H.45., 

H.46., H.47

Buoyancy Flux 144.6 through 

448.57 m4/sec2

CEMS (flow 

monitoring 

system) and 

SIP

Ongoing Quarterly

H.10., H.21., 

H.36., H.46., 

H.47

SO2

Calculated Limit 

Daily Emissions CEMS and SIP Ongoing Quarterly

H.11., H.22., 

H.31., H.36., 

H.40., H.45., 

H.46., H.47

SO2

Calculated 

emission rate in 

lb/hr 

Method 6 or 

6c and SIP Annual Semiannual

H.12., H.13., 

H.24

Acid Rain 

Provisions 40 CFR 72-78 40 CFR 72-78 40 CFR 72-78 Semiannual

H.14., H.21., 

H.24., H.34., 

H.37., H.44., 

H.46., H.47

NOx 0.40 lb/mmBtu 

(average annual) CEMS Ongoing Quarterly

H.15., H.27., 

H.38., H.46., 

H.47

PM CAM Plan ARM 17.8.1506

Provisions 

from CAM 

Plan, 

Appendix K

Ongoing Semiannual

H.16., H.17., 

H.28., H.29., 

H.30., H.39., 

H.41., H.42., 

H.46.

Mercury

0.9 lb/TBtu and 

Installation/ 

Operation of 

Mercury Control 

System

MEMS Ongoing Quarterly

Conditions

H.1. PPLM may not cause or authorize emissions to be discharged into the outdoor atmosphere from 

any sources installed on or before November 23, 1968, that exhibit an opacity of 40% or greater 

averaged over 6 consecutive minutes (ARM 17.8.304 and ARM 17.8.749).

H.2. PPLM shall not exhibit opacity from the boiler greater than 23% for a 1-hour averaging period 

and greater than 17% for a 24-hour averaging period (Department Notice of Violation and Order 

to Take Corrective Action dated February 28, 1985 and ARM 17.8.309).

H.3. Emissions shall not exceed the value calculated using E = 0.882 * H-0.1664, where H is the heat 

input capacity in MMBtu per hour and E is the maximum allowable particulate emissions rate in 

lbs per MMBtu (ARM 17.8.309).
OP2953-06 16 Draft: 05/16/2011

H.4. PPLM shall not cause to be discharged into the atmosphere particulate matter in excess of 0.26 

lb/MMBtu (ARM 17.8.749).

H.5. PPLM shall not burn liquid or solid fuels containing sulfur in excess of 1lb/MMBtu fired (ARM 

17.8.322(4)).

H.6. PPLM 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 (ARM 

17.8.322(5)).

H.7. PPLM shall not emit SO2 in excess of the 9,999,000 lb/calendar year. This condition became 

effective March 4, 1998. (EPA approved the Billings/Laurel SO2 Control Plan into the SIP on 

May 2, 2002.)

H.8. PPLM shall not emit SO2 from the J.E. Corette boiler in excess of the three-hour emission 

limitation as contained in the SO2 SIP Appendix, Stipulation, Exhibit A, Section 3(A)(1)(a). 

(EPA approved the Billings/Laurel SO2 Control Plan into the SIP on May 2, 2002.)

H.9. PPLM shall not, except as provided in the SO2 SIP Appendix, Stipulation, Exhibit A, Section 

2(A)(7), have a Buoyancy Flux of less than 144.6 m4/sec3or in excess of 448.57 m4/sec

3

at any 

time. (EPA approved the Billings/Laurel SO2 Control Plan into the SIP on May 2, 2002.)

H.10. PPLM shall not emit SO2 from the J.E. Corette boiler in excess of the sum of all of the three-hour 

emission limitations pursuant to the SO2 SIP Appendix, Stipulation, Exhibit A, Section 

3(A)(1)(a). (EPA approved the Billings/Laurel SO2 Control Plan into the SIP on May 2, 2002.)

H.11. PPLM shall conduct annual emission testing to determine the sulfur dioxide emission rate in 

pounds per hour. (EPA approved the Billings/Laurel SO2 Control Plan into the SIP on May 2, 

2002.)

H.12. PPLM shall comply with all requirements in the Acid Rain Appendix H of this permit including 

the operation and maintenance of the SO2 and NOx Continuous Emissions Monitoring System 

(CEMS) (ARM 17.8.1210(3)).

H.13. Emissions shall not be permitted in excess of any allowances that PPLM lawfully holds under 

Title IV of the FCAA or the regulations promulgated thereunder (ARM 17.8.1210(3)(a)).

a. A permit revision is not required for increases in emissions authorized by allowances 

acquired pursuant to the acid rain program, provided that such increases do not require a 

permit revision under any other applicable requirement (ARM 17.8.1210(3)(b)).

b. The permittee may not use allowances as a defense to noncompliance with any other 

applicable requirement (ARM 17.8.1210(3)(c)).

c. Any allowances shall be accounted for according to the procedures established in 

regulations promulgated under Title IV of the FCAA (ARM 17.8.1210(3)(d)).

H.14. Pursuant to 40 CFR §76.7(a)(1), the permittee shall not discharge or allow to be discharged, 

emissions of NOx to the atmosphere in excess of 0.4 lb/MMBtu on an annual average basis.

H.15. PPLM shall provide a reasonable assurance of compliance with emission limitations or standards 

for the anticipated range of operations of the Tangential Coal-Fired Boiler for PM (ARM 

17.8.1504).
OP2953-06 17 Draft: 05/16/2011

H.16. Beginning January 1, 2010, emissions of mercury from the boiler shall not exceed 0.9 pounds 

mercury per trillion British thermal units (lb/TBtu), calculated as a rolling 12-month average 

(ARM 17.8.771).

H.17. PPLM shall install a mercury control system that oxidizes and sorbs emissions of mercury. PPLM 

shall implement the operation and maintenance of the mercury control system on or before 

January 1, 2010 (ARM 17.8.771). 

Compliance Demonstration

H.18. As required by the Department and Section III.A.1, PPLM shall perform a Method 9 test or 

another method approved by the Department to monitor compliance with the opacity limitation in 

Section III.H.1. Method 9 source tests must be performed in accordance with the Montana 

Source Test Protocol and Procedures Manual (ARM 17.8.1213, ARM 17.8.106)

H.19. PPLM shall operate and maintain the opacity CEM to monitor compliance with the opacity 

limitation in Section III.H.2. The testing shall be performed in accordance with the Opacity 

CEMS Appendix F and the Operation Modification Plan – Revision 4 Appendix J of this permit.

As an addendum to the Operation Modification Plan - Revision 4 Appendix J, PPLM shall be 

allowed 30 to 60 minutes to successfully reset an ESP trip. In the event that this procedure fails 

in the time allotted, then the appropriate corrective actions contained in the Operation 

Modification Plan – Revision 4 Appendix J need to be initiated (ARM 17.8.1213).

H.20. PPLM shall perform a Method 5 or 5B particulate matter test semiannually during periods the 

equipment is in operation to monitor compliance with the particulate matter limit in Sections 

III.H.3 and III.H.4. The testing shall be performed in accordance with the Montana Source Test 

Protocol and Procedures Manual. Heat input shall be calculated in accordance with 40 CFR Part 

75 Appendix F, Subsection 5 – Procedures for Heat Input (ARM 17.8.1213 and ARM 17.8.106).

H.21. PPLM shall operate, calibrate and maintain CEMS for the following (ARM 17.8.1213):

a. A CEMS for the measurement of SO2 shall be operated on the stack (ARM 17.8.340 and 

40 CFR 60.45);

b. A CEMS for the measurement of NOx shall be operated on the stack (ARM 17.8.340 and 

40 CFR 60.45); 

c. A CEMS for the measurement of opacity shall be operated on the stack (ARM 17.8.340 

and 40 CFR 60.45); and

d. Continuous monitoring for stack gas temperature, stack gas moisture (where necessary), 

megawatt production, and Btu per hour shall be performed on each unit (40 CFR 52.21) 

H.22. PPLM shall conduct a Method 6, 6c, or another method approved by the Department annually to 

monitor compliance with the condition in Section III.H.11. The tests shall be conducted in 

accordance with the SO2 CEMS Appendix F of this permit. 

Pursuant to the SO2 SIP Appendix, the annual or semiannual Relative Accuracy Test Audits 

(RATA) may be substituted for the annual source tests provided that the flow rate RATA and the 

concentration RATA are performed simultaneously and additional calculations are made to 

determine and report the data in pounds per hour of sulfur dioxide (ARM 17.8.1213 and SIP 

Appendix I).
OP2953-06 18 Draft: 05/16/2011

H.23. PPLM shall monitor compliance with the emissions limit in condition III.H.6 by burning pipeline 

quality natural gas or propane (ARM 17.8.1213).

H.24. PPLM shall monitor compliance with the emission limitation in Section III.H.14 by following the 

requirements of 40 CFR Part 75, 40 CFR Part 76, and in accordance with the NOx CEMS 

Appendix (ARM 17.8.1213).

H.25. PPLM shall monitor compliance with the limitation in Section III.H.8 pursuant to the SO2 SIP 

Appendix I of this permit except that the references on page 56.9.3.12(41) to 40 CFR Part 60, 

Appendix A, Section 6.0 and 40 CFR 60, Appendix B, Section 2.3 shall be changed to 40 CFR 

Part 75, Appendix A Section 6.0 and 40 CFR Part 75, Appendix B, Section 2.3, respectively 

(ARM 17.8.1213 and Appendix I).

H.26. PPLM shall monitor compliance with the limitation in Section III.H.9 in accordance with the SO2

SIP Appendix I of this permit through use of the Flow Monitoring System required by 40 CFR 

Part 75 and the SO2 SIP Appendix except that the references on page 56.9.3.12(41) to 40 CFR 

Part 60 Appendix A, Section 6.0 and 40 CFR Part 60, Appendix B, Section 2.3 shall be changed 

to 40 CFR Part 75, Appendix A, Section 6.0 and 40 CFR Part 75, Appendix B, Section 2.3, 

respectively. This includes the use of the temperature probe to determine hourly average stack 

gas temperature and the annubar to determine hourly average stack gas exit velocity (ARM 

17.8.1213 and Appendix I).

H.27. PPLM shall monitor compliance by following the Compliance Assurance Monitoring (CAM) 

Plan (Appendix K). The CAM Plan written by PPLM in accordance with ARM 17.8.1504 is 

summarized in Appendix K and is available in full upon request by the Department or the facility 

(ARM 17.8.1503 and ARM 17.8.1213).

H.28. PPLM shall comply with all applicable standards and limitations, and the applicable operating, 

reporting, recordkeeping, and notification requirements contained in 40 CFR Part 75 (ARM 

17.8.771).

H.29. Enforcement of Section III.H.16., where applicable, shall be determined by utilizing data taken 

from a Mercury Emission Monitoring System (MEMS). The MEMS shall be comprised of 

equipment as required in 40 CFR 75.81(a) and defined in 40 CFR 72.2. The above does not 

relieve PPLM from meeting any applicable requirements of 40 CFR Part 75. Testing 

requirements shall be as specified in 40 CFR Part 75, and shall conform to the requirements of the 

Montana Source Test Protocol and Procedures Manual (ARM 17.8.106 and ARM 17.8.771).

 

H.30. A MEMS shall be installed, certified, and operating on the boiler stack outlet on or before 

January 1, 2010. Said monitor shall comply with the applicable provisions of 40 CFR Part 75. 

The monitors shall also conform with requirements included in Appendix L (ARM 17.8.771).

Recordkeeping

H.31. All source test recordkeeping shall be performed in accordance with the test method used and the 

Montana Source Test Protocol and Procedures Manual (ARM 17.8.106 and ARM 17.8.1212).

H.32. Records shall be prepared and data kept in accordance with the Opacity CEMS Appendix E and 

the Operation Modification Plan-Revision 4 Appendix J of this permit (ARM 17.8.1212).

H.33. Records shall be prepared and data kept in accordance with the SO2 CEMS Appendix F of this 

permit (ARM 17.8.1212).

H.34. Records shall be prepared and data kept in accordance with 40 CFR Part 75 and the NOx CEMS 

Appendix G of this permit (ARM 17.8.1212).
OP2953-06 19 Draft: 05/16/2011

H.35. PPLM shall maintain, on site, a log verifying the use of pipeline quality natural gas (ARM 

17.8.1212).

H.36. Records shall be prepared and data kept in accordance with the SO2 SIP Appendix I of this permit 

(ARM 17.8.1212).

H.37. PPLM shall complete all recordkeeping for Section III.H.12 and III.H.13 as required by the Acid 

Rain Appendix H of this permit (ARM 17.8.1212).

H.38. Records shall be prepared and data kept in accordance with 40 CFR Part 64 and the CAM 

Appendix K of this permit (ARM 17.8.1212 and 40 CFR 64).

H.39. PPLM shall conduct recordkeeping pursuant to Appendix L (ARM 17.8.771 and ARM 

17.8.1212).

Reporting

H.40. The testing results shall be submitted to the Department in accordance with the Montana Source 

Test Protocol and Procedures Manual (ARM 17.8.106 and ARM 17.8.1212).

H.41. The owner or operator of any mercury-emitting generating unit shall report to the Department 

within 30 days after the end of each calendar quarter, as described in Appendix L (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;

c. Number of operating hours that the MEMS was unavailable or not operating within 

quality assurance limits (monitor downtime); and

H.42. 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).

H.43. Excess emissions and monitoring systems performance reports shall be submitted in accordance 

with the Opacity CEMS Appendix E and the Operation Modification Plan-Revision 4 Appendix J 

of this permit, except that reports shall only be required on a quarterly basis (ARM 17.8.1212). 

H.44. Reports shall be submitted in accordance with 40 CFR Parts 72 through 78. The permittee shall 

also submit to the Department the information required in the NOx CEMS Appendix G of this 

permit (ARM 17.8.1212).

H.45. PPLM shall submit reports in accordance with the SO2 SIP Appendix I of this permit (ARM 

17.8.1212).

H.46. The annual compliance certification required by Section V.B must contain a certification 

statement for the above applicable requirements (ARM 17.8.1212).

H.47. The semiannual report shall provide (ARM 17.8.1212):
OP2953-06 20 Draft: 05/16/2011

a. a summary of results of any Method 9, Method 5 or 5B, Method 6 or 6A, and any 

additional method tests conducted that semiannual period. The actual test reports for 

Method 9 need only be submitted to the Department, upon request, as specified by 

Section III.B.8;

b. a summary of submittal of excess emissions and monitoring systems performance reports 

in accordance with the Opacity CEMS Appendix E, the SO2 Appendix F, the NOx CEMS 

Appendix G, and the Operation Modification Plan – Revision 4 Appendix J of this 

permit;

c. a summary of compliance with 40 CFR Part 75 and Acid Rain Appendix H; 

d. a summary of the log required by Section III.H.35; and 

e. a summary of compliance with 40 CFR Part 64 (CAM), Appendix K of this permit.

I. EU8 – Plant Roads

Condition(s) Pollutant/

Parameter Permit Limit Method of Compliance

Frequency of 

Method

Reporting 

Requirements

I.1., I.3., I.4., 

I.5., I.6 Opacity 20% Visual Surveys Bi-monthly Annual

I.2., I.3., I.4., 

I.5., I.6 Opacity 20% Reasonable Precautions Ongoing Annual

Conditions

I.1. PPLM may not cause or authorize emissions from the Plant Roads to be discharged into the 

outdoor atmosphere that exhibit an opacity of 20% or greater averaged over 6 consecutive 

minutes (ARM 17.8.304(2)).

I.2. PPLM shall not cause or authorize the production, handling, transportation, or storage of any 

material unless reasonable precautions to control emissions of airborne particulate matter are 

taken (ARM 17.8.308(1)).

Compliance Demonstration

I.3. PPLM shall perform a Method 9 test or another method approved by the Department to monitor 

compliance with the opacity limitation in Section III.I.1. PPLM shall conduct either a semiannual 

Method 9 source test or a weekly visual survey of visible emissions on the plant roads. Under the 

visual survey option, once per calendar week, during daylight hours, PPLM shall visually survey 

the plant roads for any visible emissions. If visible emissions are observed during the visual 

survey, PPLM must conduct a Method 9 source test. The Method 9 source test must begin within 

one hour of any observation of visible emissions. If visible emissions meet or exceed 15% 

opacity based on the Method 9 source test, PPLM shall immediately take corrective action to 

contain or minimize the source of emissions. If corrective actions are taken, then PPLM shall 

immediately conduct a subsequent visual survey (and subsequent Method 9 source test if visible 

emissions remain) to monitor compliance. The person conducting the visual survey shall record 

the results of the survey (including the results of any Method 9 source test performed) in a log, 

including any corrective action taken. Conducting a visual survey does not relieve PPLM of the 

liability for a violation determined using Method 9 (ARM 17.8.101(27)). 
OP2953-06 21 Draft: 05/16/2011

If the visual surveys are not performed once per calendar week as specified above during the 

reporting period, then PPLM shall perform the Method 9 source tests on the plant roads for that 

reporting period. 

Method 9 source tests must be performed in accordance 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 is 20% or greater, 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).

Recordkeeping

I.4. If visual surveys are performed, PPLM shall maintain on site a log to verify that the visual 

surveys were performed as specified in Section III.I.3. Each log entry must include the date, 

time, results of survey (and results of subsequent Method 9, if applicable), and observer’s initials 

If any corrective action is required, the time, date, observer’s initials, and any preventive or 

corrective action taken must be recorded in the log (ARM 17.8.1212).

Reporting

I.5. The annual compliance certification required by Section V.B must contain a certification 

statement for the above applicable requirements (ARM 17.8.1212).

I.6. The semiannual report shall provide a summary of the visual surveys and any corrective action 

taken, and the results of any Method 9 tests performed and logged during that semiannual period 

as specified by Section III.I.3 and III.I.4 (ARM 17.8.1212).

J. EU9 – Emergency Diesel Generators

Condition(s) Pollutant/Parameter Permit Limit Compliance Demonstration

Method Frequency

Reporting 

Requirements

J.1., J.5., J.8., 

J.11., J.12

Opacity 20% Method 9

As required by 

the 

Department 

and Section 

III.A.1

Semiannual

J.2., J.6., J.9., 

J.11., J.12., 

Particulate from fuel 

combustion

E=1.026*H0.233

Refinery 

Quality No. 2 

Fuel Oil

Ongoing Semiannual

J.3., J.6., J.9., 

J.11., J.12.

Sulfur compounds in 

fuel (gaseous)

50 grains per 

100 SCF

Fuel analysis 

provided by 

the fuel 

provider

Annual Semiannual

J.4, J.7, J.10, 

J.13

Requirements to 

demonstrate initial 

and continuous 

compliance with 

HAPs emission 

limitations and 

operating limitations.

40 CFR 63, 

Subpart ZZZZ

40 CFR 63, 

Subpart ZZZZ

40 CFR 63, 

Subpart ZZZZ

40 CFR 63, 

Subpart ZZZZ
OP2953-06 22 Draft: 05/16/2011

Conditions

J.1. PPLM may not cause or authorize emissions to be discharged into the outdoor atmosphere from 

any source that exhibits an opacity of 20% or greater averaged over 6 consecutive minutes (ARM 

17.8.304(2)).

J.2. PPLM shall not cause or authorize particulate matter caused by the combustion of fuel to be 

discharged from any stack or chimney into the outdoor atmosphere in excess of E = 1.026 * H0.233, where H is the heat input capacity in MMBtu per hour and E is the maximum allowable 

particulate emissions rate in pounds per MMBtu (ARM 17.8.309).

J.3. PPLM shall not burn any gaseous fuel containing sulfur compounds in excess of 50 grains per 

100 standard cubic feet of gaseous fuel, calculated as hydrogen sulfide at standard conditions 

(ARM 17.8.322 (5)).

J.4. PPLM shall comply with all applicable standards and limitations, and the reporting, 

recordkeeping, and notification requirements contained in 40 CFR 63, Subpart ZZZZ, National 

Emissions Standards for Hazardous Air Pollutants for Stationary Reciprocating Internal 

Combustion Engines, for any applicable diesel engine (ARM 17.8.342 and 40 CFR 63, Subpart 

ZZZZ).

Compliance Demonstration

J.5. As required by the Department and Section III.A.1, PPL shall perform a Method 9 test to monitor 

compliance with the permit limit in Section III.J.1. The testing shall be performed in accordance 

with the Montana Source Test Protocol and Procedures Manual, or another method approved by 

the Department (ARM 17.8.106 and ARM 17.8.1213)

J.6. PPLM shall monitor compliance with Sections J.2. and J.3 by burning refinery quality No. 2 fuel 

oil (ARM 17.8.1212).

J.7. Compliance monitoring shall be performed in accordance with 40 CFR 63, Subpart ZZZZ, as 

appropriate (ARM 17.8.342 and 40 CFR 63, Subpart ZZZZ).

Recordkeeping

J.8. All compliance source testing recordkeeping shall be performed in accordance with the Source 

Test Protocol and Procedures Manual, and shall be maintained on site. Method 9 source test 

reports for opacity need not be submitted unless requested by the Department (ARM 17.8.106 and 

ARM 17.8.1212).

J.9. PPLM shall maintain a log on site of the fuel analysis received from the fuel provider (ARM 

17.8.1212).

J.10. Recordkeeping shall be performed in accordance with 40 CFR 63.ZZZZ, as appropriate (ARM 

17.8.342 and 40 CFR 63, Subpart ZZZZ).

Reporting

J.11. The annual compliance certification required by Section V.B must contain a certification 

statement for the above applicable requirements (ARM 17.8.1212).

J.12. The semiannual report shall provide (ARM 17.8.1212):
OP2953-06 23 Draft: 05/16/2011

a. a summary the results of any Method 9 tests performed and logged during that 

semiannual period (ARM 17.8.1212); and

b. a summary of the log of the fuel analysis received from the fuel provider. 

J.13. Reporting shall be performed in accordance with 40 CFR 63.ZZZZ, as appropriate (ARM 

17.8.342 and 40 CFR 63, Subpart ZZZZ).

K. EU10 – Diesel Tank

Condition(s) Pollutant/

Parameter

Permit 

Limit

Compliance Demonstration

Method Frequency

Reporting 

Requirements

K.1., K.2., 

K.3., K.4., 

K.5

Opacity 20% Method 9

As required by the 

Department and 

Section III.A.1

Annual

Conditions

K.1. PPLM may not cause or authorize emissions to be discharged into the outdoor atmosphere from 

any source that exhibits an opacity of 20% or greater averaged over 6 consecutive minutes (ARM 

17.8.304(2)).

Compliance Demonstration

K.2. As required by the Department and Section III.A.1, PPL shall perform a Method 9 test to monitor 

compliance with the permit limit in Section III.K.1. The testing shall be performed in accordance 

with the Montana Source Test Protocol and Procedures Manual, or another method approved by 

the Department (ARM 17.8.106 and ARM 17.8.1213) 

Recordkeeping

K.3. All compliance source testing recordkeeping shall be performed in accordance with the Source 

Test Protocol and Procedures Manual, and shall be maintained on site. Method 9 source test 

reports for opacity need not be submitted unless requested by the Department (ARM 17.8.106 and 

ARM 17.8.1212). 

Reporting

K.4. The annual compliance certification required by Section V.B must contain a certification 

statement for the above applicable requirements (ARM 17.8.1212).

K.5. The semiannual monitoring report shall provide a summary of results of any Method 9 test 

conducted during the period (ARM 17.8.1212). 

L. EU11 – Mercury Oxidizer/Sorbent Handling System

Condition(s) Pollutant/

Parameter

Permit 

Limit

Compliance Demonstration

Method Frequency

Reporting 

Requirements

L.1., L.3., L.4., 

L.5., L.6., L.7. Opacity 20% Visual 

Survey/ 

Method 9

Bi-monthly

Semiannual

L.2., L.3., L.4., 

L.5., L.6., L.7.

Oxidizer/Sorbent 

Handling System

Operate/

maintain 

bin vent

Semiannual
OP2953-06 24 Draft: 05/16/2011

Conditions

L.1. PPLM may not cause or authorize emissions to be discharged into the outdoor atmosphere from 

any source that exhibits an opacity of 20% or greater averaged over 6 consecutive minutes (ARM 

17.8.304(2)). 

L.2. PPLM shall operate and maintain the mercury oxidizer/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).

Compliance Demonstration

L.3. Under the visual survey option, bi-monthly during daylight hours, PPLM shall visually survey the 

Mercury Oxidizer/Sorbent Handling System for any sources of excessive emissions. PPLM shall 

conduct either a semiannual Method 9 source test or a weekly visual survey of visible emissions 

on the Mercury Oxidizer/Sorbent Handling System. Under the visual survey option, once per 

calendar week, during daylight hours, PPLM shall visually survey the Mercury Oxidizer/Sorbent 

Handling System for any visible emissions. If visible emissions are observed during the visual 

survey, PPLM must conduct a Method 9 source test. The Method 9 source test must begin within 

one hour of any observation of visible emissions. If visible emissions meet or exceed 15% 

opacity based on the Method 9 source test, PPLM shall immediately take corrective action to 

contain or minimize the source of emissions. If corrective actions are taken, then PPLM shall 

immediately conduct a subsequent visual survey (and subsequent Method 9 source test if visible 

emissions remain) to monitor compliance. The person conducting the visual survey shall record 

the results of the survey (including the results of any Method 9 source test performed) in a log, 

including any corrective action taken. Conducting a visual survey does not relieve PPLM of the 

liability for a violation determined using Method 9 (ARM 17.8.101(27)). 

If the visual surveys are not performed once per calendar week as specified above during the 

reporting period, then PPLM shall perform the Method 9 source tests on the Mercury 

Oxidizer/Sorbent Handling System for that reporting period. 

Method 9 source tests must be performed in accordance 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 is 20% or greater, 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).

Recordkeeping

L.4. All source test recordkeeping shall be performed in accordance with the Montana Source Test 

Protocol and Procedures Manual. If Method 9 tests are conducted, the test reports must be 

maintained on-site and must be submitted to the Department upon request. If visual surveys are 

performed, PPLM shall maintain a log to verify that the visual surveys were performed as 

specified in Section III.L.3. Each log entry must include the date, time, results of survey, and 

observer’s initials. Whether visual surveys or Method 9 tests are conducted, if any corrective 

action is required, the time, date, observer’s initials, and any preventative or corrective action 

taken must be recorded in the log (ARM 17.8.106 and ARM 17.8.1212).

Reporting

L.5. All method reports shall be submitted in accordance with the Montana Source Test Protocol and 

Procedures Manual (ARM 17.8.106 and ARM 17.8.1212).
OP2953-06 25 Draft: 05/16/2011

L.6. The annual compliance certification required by Section V.B must contain a certification 

statement for the above applicable requirements (ARM 17.8.1212).

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

a. A summary of any corrective action performed as a result of the visual survey 

requirement; and

b. A summary of the results of any Method 9 source tests performed during the semiannual 

period.
OP2953-06 26 Draft: 05/16/2011

SECTION IV. NON-APPLICABLE REQUIREMENTS

Air Quality Administrative Rules of Montana (ARM) and Federal Regulations identified as not applicable 

to the facility or to a specific emissions unit at the time of the permit issuance are listed below (ARM 

17.8.1214). The following list does not preclude the need to comply with any new requirements that may 

become applicable during the permit term.

A. Facility-Wide

The following table contains non-applicable requirements, which are administrated by the Air 

Resources Management Bureau of the Department of Environmental Quality.

Rule Citation Reason

This is not an affected facility under this rule.

40 CFR 60, SUBPART B Or the facility is not in this source category.

40 CFR 60, SUBPART C

40 CFR 60, SUBPART Ca

40 CFR 60, SUBPART Cb

40 CFR 60, SUBPART D

40 CFR 60, SUBPART Da

40 CFR 60, SUBPART Db

40 CFR 60, SUBPART Dc

40 CFR 60, SUBPART E

40 CFR 60, SUBPART Ea

40 CFR 60, SUBPART Eb

40 CFR 60, SUBPART F

40 CFR 60, SUBPART G

40 CFR 60, SUBPART H

40 CFR 60, SUBPART I

40 CFR 60, SUBPART J

40 CFR 60, SUBPART K

40 CFR 60, SUBPART L

40 CFR 60, SUBPART M

40 CFR 60, SUBPART N

40 CFR 60, SUBPART O

40 CFR 60, SUBPART P

40 CFR 60, SUBPART Q

40 CFR 60, SUBPART R

40 CFR 60, SUBPART S

40 CFR 60, SUBPART T

40 CFR 60, SUBPART U

40 CFR 60, SUBPART V

40 CFR 60, SUBPART W

40 CFR 60, SUBPART X

40 CFR 60, SUBPART Y

40 CFR 60, SUBPART Z

40 CFR 60, SUBPART AA

40 CFR 60, SUBPART AAA

40 CFR 60, SUBPART BB

40 CFR 60, SUBPART CC

40 CFR 60, SUBPART DD

40 CFR 60, SUBPART EE

40 CFR 60, SUBPART GG

40 CFR 60, SUBPART HH

40 CFR 60, SUBPART KK
OP2953

-06 27 Draft: 05/16/2011

Rule Citation Reason

40 CFR 60, SUBPART LL

40 CFR 60, SUBPART MM

40 CFR 60, SUBPART NN

40 CFR 60, SUBPART PP

40 CFR 60, SUBPART QQ

40 CFR 60, SUBPART RR

40 CFR 60, SUBPART SS

40 CFR 60, SUBPART TT

40 CFR 60, SUBPART UU

40 CFR 60, SUBPART VV

40 CFR 60, SUBPART WW

40 CFR 60, SUBPART XX

40 CFR 60, SUBPART BBB

40 CFR 60, SUBPART DDD

40 CFR 60, SUBPART FFF

40 CFR 60, SUBPART GGG

40 CFR 60, SUBPART HHH

40 CFR 60, SUBPART III

40 CFR 60, SUBPART JJJ

40 CFR 60, SUBPART KKK

40 CFR 60, SUBPART LLL

40 CFR 60, SUBPART NNN

40 CFR 60, SUBPART OOO

40 CFR 60, SUBPART PPP

40 CFR 60, SUBPART QQQ

40 CFR 60, SUBPART RRR

40 CFR 60, SUBPART SSS

40 CFR 60, SUBPART TTT

40 CFR 60, SUBPART UUU

40 CFR 60, SUBPART VVV

40 CFR 61, SUBPART B

40 CFR 61, SUBPART C

40 CFR 61, SUBPART D

40 CFR 61, SUBPART E

40 CFR 61, SUBPART F

40 CFR 61, SUBPART H

40 CFR 61, SUBPART I

40 CFR 61, SUBPART J

40 CFR 61, SUBPART K

40 CFR 61, SUBPART L

40 CFR 61, SUBPART N

40 CFR 61, SUBPART O

40 CFR 61, SUBPART P

40 CFR 61, SUBPART Q

40 CFR 61, SUBPART R

40 CFR 61, SUBPART T

40 CFR 61, SUBPART V

40 CFR 61, SUBPART W

40 CFR 61, SUBPART Y

40 CFR 61, SUBPART BB

40 CFR 61, SUBPART FF

40 CFR 63, SUBPARTF

40 CFR 63, SUBPART G

40 CFR 63, SUBPART H
OP2953-06 28 Draft: 05/16/2011

Rule Citation Reason

40 CFR 63, SUBPART I

40 CFR 63, SUBPART L

40 CFR 63, SUBPART M

40 CFR 63, SUBPART N

40 CFR 63, SUBPART O

40 CFR 63, SUBPART Q

40 CFR 63, SUBPART R

40 CFR 63, SUBPART T

40 CFR 63, SUBPART W

40 CFR 63, SUBPART Z

40 CFR 63, SUBPART EE

40 CFR 82, SUBPART A This rule is not applicable because the facility does 

40 CFR 82, SUBPART C not conduct the activities addressed by this rule.

40 CFR 82, SUBPART D

40 CFR 82, SUBPART E

40 CFR 82, SUBPART G

B. Emissions Units

EU1 – Ash Handling System

Rule Citation Reason

ARM 17.8.309 This rule is not applicable because this emissions 

unit is not fuel burning equipment.

ARM 17.8.322 This rule is not applicable because the pollutant 

regulated by this rule is not emitted from this 

emissions unit.

40 CFR 82 SUBPART B This rule is not applicable because the activities 

identified are not conducted as part of this emissions 

unit.

40 CFR 72 These regulations are not applicable because the 

emissions unit is not an affected facility under acid 

rain

40 CFR 73

40 CFR 75

40 CFR 76

40 CFR 77 

40 CFR 78

EU2 – Auxiliary Boiler

Rule Citation Reason

ARM 17.8.310 This rule is not applicable to particulate matter 

emitted from fuel burning equipment.

40 CFR 82,SUBPART B This rule is not applicable because the activities 

identified are not conducted as part of this emissions 

unit.

40 CFR 72 These regulations are not applicable because the 

emissions unit is not an affected facility under acid 

rain.

40 CFR 73

40 CFR 75

40 CFR 76

40 CFR 77 

40 CFR 78
OP2953-06 29 Draft: 05/16/2011

EU3 – Coal Handling System

Rule Citation Reason

ARM 17.8.309 This rule is not applicable because this emissions 

unit is not fuel burning equipment.

ARM 17.8.322 This rule is not applicable because the pollutant 

regulated by this rule is not emitted from this 

emissions unit.

ARM 17.8, Subchapter 7 No MAQP is required to date for the emissions unit. 

Future changes may trigger applicability of the 

requirement.

40 CFR 82, SUBPART B This rule is not applicable because the activities 

identified are not conducted as part of this emissions 

unit.

40 CFR 72 These regulations are not applicable because the 

emissions unit is not an affected facility under acid 

rain.

40 CFR 73

40 CFR 75

40 CFR 76

40 CFR 77 

40 CFR 78

EU4 – Coal Storage Piles

Rule Citation Reason

ARM 17.8.309 This rule is not applicable because this emissions 

unit is not fuel burning equipment.

ARM 17.8.322 This rule is not applicable because the pollutant 

regulated by this rule is not emitted from this 

emissions unit.

ARM 17.8, Subchapter 7 No MAQP is required to date for the emissions unit. 

Future changes may trigger applicability of the 

requirement.

40 CFR 82, SUBPART B This rule is not applicable because the activities 

identified are not conducted as part of this emissions 

unit.

40 CFR 82, SUBPART F

40 CFR 72 These regulations are not applicable because the 

emissions unit is not an affected facility under acid 

rain

40 CFR 73

40 CFR 75

40 CFR 76

40 CFR 77 

40 CFR 78

EU5 – Gasoline Storage Tank

None requested.
OP2953-06 30 Draft: 05/16/2011

EU6 – Internal Combustion Engines (Vehicles)

Rule Citation Reason

ARM 17.8.308 This rule is not applicable because this facility or 

emissions unit does not emit fugitive particulate 

matter.

ARM 17.8.310 This rule is not applicable to particulate matter 

emitted from fuel burning equipment.

ARM 17.8, Subchapter 7 No MAQP is required to date for the emissions unit. 

Future changes may trigger applicability of the 

requirement.

40 CFR 82, SUBPART B This rule is not applicable because the activities 

identified are not conducted as part of this emissions 

unit.

40 CFR 72 These regulations are not applicable because the 

emissions unit is not an affected facility under acid 

rain.

40 CFR 73

40 CFR 75

40 CFR 76

40 CFR 77 

40 CFR 78

EU7 – J. E. Corette Boiler

Rule Citation Reason

ARM 17.8.310 This rule is not applicable to particulate matter 

emitted from fuel burning equipment

40 CFR 82, SUBPART B This rule is not applicable because the activities 

identified are not conducted as part of this emissions 

unit.

40 CFR 82, SUBPART F

40 CFR 73, SUBPART G This rule is not applicable because the facility does 

not conduct the activities addressed by this rule.

EU8 – Plant Roads

Rule Citation Reason

ARM 17.8.304 This emissions unit is regulated by ARM 17.8.308.

ARM 17.8.309 This rule is not applicable because this emissions 

unit is not fuel burning equipment.

ARM 17.8.322 This rule is not applicable because the pollutant 

regulated by this rule is not emitted from this 

emissions unit.

ARM 17.8, Subchapter 7 No MAQP required to date for the emissions unit. 

Future changes may trigger applicability of the 

requirement.

40 CFR 82, SUBPART B This rule is not applicable because the activities 

identified are not conducted as part of this emissions 

unit.

40 CFR 82, SUBPART F

40 CFR 72 These regulations are not applicable because the 

emissions unit is not an affected facility under acid 

rain

40 CFR 73

40 CFR 75

40 CFR 76

40 CFR 77 

40 CFR 78
OP2953-06 31 Draft: 05/16/2011

EU9 – Emergency Diesel Generators

Rule Citation Reason

ARM 17.8.310 This rule is not applicable to particulate matter 

emitted from fuel burning equipment

ARM 17.8, Subchapter 7 No MAQP required to date for the emissions unit. 

Future changes may trigger applicability of the 

requirement.

40 CFR 82, SUBPART B This rule is not applicable because the activities 

identified are not conducted as part of this emissions 

unit.

40 CFR 82, SUBPART F

40 CFR 72 These regulations are not applicable because the 

emissions unit is not an affected facility under acid 

rain.

40 CFR 73

40 CFR 75

40 CFR 76

40 CFR 77 

40 CFR 78
OP2953-06 32 Draft: 05/16/2011

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 permit modification, revocation, and reissuance, or 

termination, or of a notification of planned changes 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 impacts of continuing operations, and that such health, safety, or 

environmental impacts were unforeseeable and could not have otherwise been avoided.

4. The permittee shall furnish to the Department, within 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 at the time of permit issuance shall be supplemental to, and shall not sanction 

noncompliance with the applicable requirements on which it was based.

6. For applicable requirements that will become effective 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 Permit Program §1207 and §1213(7)(a)&(c)-(d)

1. Any application form, report, or compliance certification submitted pursuant to ARM Title 17, 

Chapter 8, Subchapter 12 shall contain 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.

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 the previous calendar year (i.e., January 1 – December 

31).
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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 and condition of the permit 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 listed in the Notification Addresses Appendix of this 

permit.

C. Permit Shield

ARM 17.8 Subchapter 12 Operating 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 requirements and any non-federally enforceable 

requirements as of the date of permit issuance.

2. The permit shield described in 1 above shall remain in effect during the appeal of any permit 

action (renewal, revision, reopening, or revocation 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 information from a source pursuant to Sec. 7414 of 

the FCAA;

e. The ability of the Department to obtain information from a source pursuant to the Montana 

Clean Air Act, Title 75, Chapter 2, MCA;

f. The emergency powers of the Department under the Montana Clean Air Act, Title 75, 

Chapter 2 MCA; and
OP2953-06 34 Draft: 05/16/2011

g. The ability of the Department to establish or revise requirements for the use of reasonably 

available control technology (RACT) as defined 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 submitting 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 shall then be presumed to be in compliance or noncompliance 

unless that presumption is overcome by other relevant credible evidence.

6. The permit shield will not extend to minor permit modifications or changes not requiring a permit 

revision (see Sections I & J).

7. The permit shield will extend to significant permit modifications and transfer or assignment of 

ownership (see Sections K & O).

D. Monitoring, Recordkeeping, and Reporting Requirements

ARM 17.8, Subchapter 12, Operating 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 required monitoring data and support information for a 

period of at least 5 years from the date of the monitoring sample, measurement, report, or

application. Support information includes all 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 maintained in their original form at the plant site and 

shall be made available to Department personnel upon request.

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 otherwise specified in an applicable requirement or 
OP2953-06 35 Draft: 05/16/2011

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 January 1 through June 30 of the current year. 

All instances of deviations from the permit requirements 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, Operating 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 probable cause of such deviations, and any corrective 

actions or preventive measures taken. To be considered prompt, deviations shall be reported to the 

Department within the following timeframes (unless otherwise specified in an applicable 

requirement):

1. For deviations which may result in emissions potentially in violation of permit limitations:

a. An initial phone notification (or faxed or electronic notification) describing the incident 

within 24 hours (or the next business day) of discovery; and,

b. A follow-up written, faxed, or electronic report within 30 days of discovery of the deviation 

that describes the probable cause of the reported deviation and any corrective actions or 

preventative measures taken.

2. For deviations attributable to malfunctions, deviations shall be reported to the Department in 

accordance with the malfunction reporting requirements under ARM 17.8.110; and

3. For all other deviations, deviations shall be reported to the Department via a written, faxed, or 

electronic report within 90 days of discovery (as determined through routine internal review by 

the permittee).

Prompt deviation reports do not need to be resubmitted with regular semiannual (or other routine) 

reports, but may be referenced by the date of submittal.

F. Emergency Provisions

ARM 17.8, Subchapter 12, Operating Permit 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 that causes the source to exceed a technologybased emission limitation under this permit due to unavoidable increases in emissions attributable 

to the emergency. An emergency 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 permittee demonstrates through properly signed, 

contemporaneous logs, or other relevant evidence that:

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

b. The permitted facility was at the time being properly operated;
OP2953-06 36 Draft: 05/16/2011

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 exceeded 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 mitigate emissions, and corrective actions taken.

3. These emergency provisions are in addition to any emergency, malfunction or upset provision 

contained in any applicable requirement.

G. Inspection and Entry

ARM 17.8, Subchapter 12, Operating 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 administrator 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 emissions-related 

activity is conducted, or where records 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, emission 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 applicable workplace safety rules or requirements 

at the time of the 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, Operating 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 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.
OP2953-06 37 Draft: 05/16/2011

3. If the permittee fails to pay the required fee (or any required portion of an appealed fee) within 90 

days of the due date of the fee, the Department may impose an additional assessment of 15% of 

the fee (or any required portion of an appealed 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, Operating 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, updating, supplementation, or deletion, and may 

reference any required information that has been previously submitted.

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 within the facility as described below, provided the 

following conditions are met:

a. The proposed changes do not require the permittee to obtain a Montana Air Quality 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 changes 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 terms that are necessary to enforce applicable 

emission limitations on emission units 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 Sec. 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;
OP2953-06 38 Draft: 05/16/2011

c. Each proposed change meets all applicable requirements and does not violate any existing 

permit term or condition; and

d. The permittee provides contemporaneous written 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).

K. Significant Permit Modifications

ARM 17.8, Subchapter 12, Operating 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. Significant 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 permit monitoring terms or conditions;

c. Every relaxation of permit reporting or recordkeeping 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 requirements of ARM Title 17, Chapter 8, including those 

for applications, public participation, and review by affected states and the administrator, as they 

apply to permit issuance and renewal, except that an application for a significant permit 

modification need only address in detail those portions of the permit application that require 

revision, updating, supplementation, or deletion.

3. The permit shield provided for in ARM 17.8.1214 shall extend to significant modifications.

L. Reopening for Cause

ARM 17.8, Subchapter 12, Operating Permit Program, §1228(1)&(2)

1. This permit may be reopened and revised under the following circumstances:

a. 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 the 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);

b. Additional requirements (including excess emissions requirements) become applicable to an 

affected source under the Acid Rain Program. Upon approval by the administrator, excess 

emissions offset plans shall be deemed to be incorporated into the permit;
OP2953-06 39 Draft: 05/16/2011

c. The Department or the administrator determines that the permit contains a material mistake or 

that inaccurate statements were made in establishing the emission standards or other terms or 

conditions of the permit; or

d. The administrator or the Department determines that the permit must be revised or revoked 

and reissued to ensure compliance with the applicable requirements.

M. Permit Expiration and Renewal

ARM 17.8., Subchapter 12, Operating Permit Program, §1210(2)(g), §1220(11)&(12), and, 

§1205(2)(d)

1. This permit is issued for a fixed term of 5 years.

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 application 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 permit renewal has been issued or denied.

4. For renewal, the permittee shall submit a complete 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 writing to the permittee a longer time period for 

submission of the renewal application. Such written notification must be provided at least one 

year before the renewal application due date established in the existing permit.

N. Severability Clause

ARM 17.8, Subchapter 12, Operating 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 shall not impair in any manner the underlying applicability of 

all applicable requirements, and 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 invalid, all valid parts that are severable from the 

invalid part remain in effect. If a provision of a permit is invalid in 1 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, Operating 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 responsibility, coverage, and liability between the current and new 

permittee.

2. The permit shield provided for in ARM 17.8.1214 shall not extend to administrative permit 

amendments.
OP2953-06 40 Draft: 05/16/2011

P. Emissions Trading, Marketable Permits, Economic Incentives

ARM 17.8, Subchapter 12, Operating Permit Program, §1226(2)

Notwithstanding ARM 17.8.1226(1) and (7), minor air quality operating permit modification 

procedures may be used for permit modifications involving the use of economic incentives, 

marketable permits, emissions trading, and other similar approaches, to the extent that such minor 

permit modification procedures are explicitly provided 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, Operating Permit Program, §1210(2)(d)

This permit does not convey any property rights of any sort, or any exclusive privilege.

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 Application, 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 emission 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.
OP2953-06 41 Draft: 05/16/2011

Y. Montana Air Quality Permits (MAQP)

ARM 17.8, Subchapter 7, Permit, Construction and 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, install, 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 ARM 17.8.743, 744, 745, 748, and 764.

3. ARM 17.8.745(1) specifies de minimis changes as construction or changed conditions of 

operation at a facility holding a Montana Air Quality Permit (MAQP) 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 MAQP or any applicable 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 condition of operation that would affect the plume rise or 

dispersion characteristic of emissions that would 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 smaller projects to avoid Montana Air Quality Permitting; or

e. Emission reductions obtained through offsetting within a facility are not included when 

determining the potential emission increase from construction or changed 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 operation 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 practicable 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 abatement activities except in accordance with 40 

CFR Part 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)
OP2953-06 42 Draft: 05/16/2011

BB. Stratospheric Ozone Protection – Servicing 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 Part 82, Subpart B.

CC. Stratospheric Ozone Protection – Recycling and Emissions Reductions

40 CFR Part 82, Subpart F

The permittee shall comply with the standards for recycling and emissions reduction in 40 CFR Part 

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, repair or disposal of appliances must comply 

with the standards for recycling and recovery 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, MVACs, and MVAC-like (as defined at §82.152) 

appliances must comply with recordkeeping requirements pursuant to §82.166;

5. Persons owning commercial or industrial process refrigeration 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 added to such appliances pursuant to §82.166.

DD. Emergency Episode Plan

The permittee shall comply with the requirements contained 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 Emergency Episode Action Plan (EEAP) that 

details how the source will curtail emissions during an air 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 Abbreviations Appendix of this 

permit shall have the meaning assigned to them in the referenced regulations.
OP2953-06 43 Draft: 05/16/2011

APPENDICES

 
OP2953-06 A-1 Draft: 05/16/2011

Appendix A INSIGNIFICANT EMISSIONS UNITS

Disclaimer: The information in this appendix is not State or Federally enforceable but is presented to 

assist the permittee, 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 Section 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 activities were provided by the permittee. Because 

there are no requirements to update such a list, the emissions units and/or activities may change from 

those specified in the table.

Emissions Unit ID Description

EU11 Process Tank Vents

EU12 Carbon dioxide System Safety Valves & Vents
OP2953-06 B-1 Draft: 05/16/2011

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 phone 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 PPLM;

(d) requires changes in monitoring or reporting requirements 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 quality 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 emissions units in a source 

requiring an air quality operating permit (including requirements 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 entered into or issued by the Department, that is 

contained in the Montana state implementation 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 Montana Air Quality 

Permit issued by the Department under Subchapters 7, 8, 9 and 10 of this chapter, or pursuant 

to regulations 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 solid waste incineration, under Sec. 7429 of the 

FCAA;

(h) any standard or other requirement for consumer and commercial products, under Sec. 

7511b(e) of the FCAA;

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

(j) any standard or other requirement of the regulations 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 increment or visibility requirement under part C 

of Title I of the FCAA, but only as it would apply 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.
OP2953-06 B-2 Draft: 05/16/2011

"Certified Visible Emissions Evaluator" means a person who has received certification as a qualified 

observer in accordance with the requirements of 40 CFR Part 60, Appendix A Method 9 Section 3.

"Department" means the Montana Department of Environmental Quality.

"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 term "unit" for purposes of Title IV of the FCAA.

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

"Federally enforceable" means all limitations and conditions 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 51, Subpart I, including operating permits 

issued under an EPA approved program that is incorporated into the Montana state implementation plan 

and expressly requires adherence to any permit issued under such program.

"Fugitive emissions" means those emissions which could not reasonably pass through a stack, chimney, 

vent, or other functionally 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 multiple 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 Sec. 

112(b) of the FCAA. 

"Non-federally enforceable requirement" means the following as they apply to emissions 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 implementation plan approved or promulgated by the 

administrator through rule making under Title I of the FCAA

(b) any term, condition or other requirement contained in any Montana Air Quality 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 standard contained in Subchapter 2 of this 

chapter.

"Permittee" means the owner or operator of any source subject to the permitting requirements of this 

subchapter, as provided in ARM 17.8.1204, that holds a valid air quality operating permit or has 

submitted a timely and complete permit 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 air 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
OP2953-06 B-3 Draft: 05/16/2011

(e) any pollutant subject to a standard or other 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 applicable 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 any 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 representative is approved in advance by the 

Department.

(b) For a partnership or sole proprietorship: a general partner or the proprietor respectively.

(c) For a municipality, state, federal, or other public agency: either a principal 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.
OP2953-06 B-4 Draft: 05/16/2011

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

Hg mercury

IEU insignificant emissions unit

MAQP Montana Air Quality Permit

Mbdft thousand board feet

MEMS Mercury Emission Monitoring System

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

NO2 nitrogen dioxide

O2 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

SO2 sulfur dioxide

SOx oxides of sulfur

TBtu trillion British Thermal Units

tpy tons per year

U.S.C. United States Code

VE visible emissions

VOC volatile organic compound
OP2953-06 C-1 Draft: 05/16/2011

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 West 15th 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 80202-1129
OP2953-06 D-1 Draft: 05/16/2011

Appendix D AIR QUALITY INSPECTOR INFORMATION

Disclaimer: The information in this appendix is not State or Federally enforceable but is presented to 

assist the permittee, permitting authority, inspectors, and the public.

1. Direction to Plant:

Exit on 27th Street Interchange from I-90 in Billings. Travel east paralleling Interstate 90 on the south 

side to Charlene Street and turn right. The plant gate is two blocks away on the right.

2. Safety Equipment Required:

The following safety guidelines were submitted by Montana Power Company. It is assumed that all 

safety equipment, and procedures will stay the same with the new owner, PPL Montana, LLC.

.

GENERAL SAFETY GUIDELINES FOR THE J.E. CORETTE PLANT

The following are the general safety rules for visitors at the J.E. Corette Plant. In all instances, 

visitors will be escorted by a company employee.

SAFETY GLASSES AND HARD HATS

All visitors are required to wear hard hats and safety glasses in the plant area, except when in the 

offices, lunchrooms, or other protected areas.

PROPER CLOTHING

Clothing and shoes that are suitable for the particular type of work and existing weather conditions 

shall be worn. Dresses, or other loose clothing, are not recommended.

PROTECTIVE FOOTWEAR

Closed-toe (no sandals), low-heeled shoes shall be worn. High-heel shoes with a heel less than 1 and 

1⁄2 inch in diameter are not allowed.

SIGNS

Special instruction signs are for the safety of employees, visitors, and equipment. These instructions 

shall be observed at all times.

- Caution signs (Black and Yellow)

Indicate a possible hazard against which proper precaution should be taken. Caution signs 

warn against potential hazards or caution against an unsafe practice.

- Danger Signs (Red, Black, and White)

Indicate immediate danger, and special precautions are necessary.

- Safety Instruction Signs (Green and White)

Provide general instructions and for suggestive information.
OP2953-06 D-2 Draft: 05/16/2011

- Radiation Warning Signs (Reddish Purple and Yellow)

Warn of a radiation hazard only. Special precautions and equipment are necessary.

- Direction Signs (Black and White)

Ensure the safe and efficient flow of vehicles and pedestrian traffic.

- Fire Prevention and Location Signs (Red and White)

Inform of the location and give special instructions for fire prevention. All "NO SMOKING" 

and other fire protection signs shall be observed.

Vision, Hearing and respiratory protection signs, where posted, shall be observed.

HORSEPLAY

Scuffling and practical jokes are dangerous and are strictly forbidden.

SMOKING POLICY

Smoking or open flames shall not be permitted in areas where explosive atmospheres might be 

present or in any other area posted as a "NO SMOKING" area.

Absence of "NO SMOKING" signs shall not excuse smoking in dangerous places.

SEAT BELTS

Where seat belts are provided in vehicles and equipment, they shall be used at all times while the 

vehicle or equipment is being operated.

DRUGS AND ALCOHOL

The use of intoxicating beverages on Company premises is strictly forbidden.

The use of any drug on Company property, except those prescribed by competent medical authority, 

is strictly forbidden by Company Policy.

3. Facility Plot Plan:

The facility plot plan was submitted to the Department with the original operating permit application 

submitted for Permit #OP2953-00. The facility plot plan is on file with the Department.
OP2953-06 E-1 Draft: 05/16/2011

Appendix E OPACITY CEMS

Nothing in this appendix is intended to alter the requirement sin the Acid Rain Appendix.

1. Pursuant to 40 CFR Part 75, the permittee shall calibrate, maintain, and operate continuous 

monitoring systems.

Except for system breakdowns, repairs, calibration checks, and zero and span adjustments required 

pursuant to 40 CFR 60.13(d), 40 CFR Part 75 and the accuracy audits required below, all continuous 

monitoring systems shall be in continuous operation.

The permittee shall conduct annual accuracy audits using a calibration jig and NBS-traceable neutral 

density filters on the continuous monitoring system.

2. The permittee shall maintain records for a minimum of five years of the log sheets, computerized 

data, analysis, and calculations used to prepare the required reports.

3. The permittee shall submit reports to the Department containing the information required by 40 CFR 

60.7 and as explained below, except that all reports shall only be required Semiannual for each sixmonth period.

a. The permittee shall maintain records of the occurrence and duration of any startup, shutdown, or 

malfunction in the operation of an affect facility; any malfunction of the air pollution control 

equipment; or any periods during which the continuous monitoring system is inoperative.

b. The permittee shall submit an excess emissions and monitoring systems performance report 

and/or a summary report form (see paragraph (c) below) to the Department. Written reports of 

reportable excess emissions greater than 40% (6-minute average), 23% (1-hour average), or 17% 

(24-hour average) shall include the following information:

i. The magnitude of excess emissions, any conversion factor(s) used, and the date and time 

of commencement and completion of each time period of excess emissions. The process 

operating time during the reporting period.

ii. 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.

iii. The date and time identifying each period during which the continuous monitoring 

system was inoperative except for zero and span checks and the nature of the system 

repairs or adjustments.

iv. When no excess emissions have occurred or the continuous monitoring system(s) have 

not been inoperative, repaired, or adjusted, such information shall be stated in the report.

c. The summary report form shall contain the information and be in the format shown in Figure 1. 

The summary report form shall be submitted;

i. If the total duration of excess emissions for the reporting period is less than one percent 

(1%) of the total operating time for the reporting period and CEMS down time for the 

reporting period is less than five percent (5%) of the total operating time for the reporting 

period, only the summary report form shall be submitted and the excess emission report 

described in section (b) above need not be submitted unless requested.
OP2953-06 E-2 Draft: 05/16/2011

ii. If the total duration of excess emissions for the reporting period is one percent (1%) or 

greater of the total operating time for the reporting period or the total CEMS downtime 

for the reporting period is five percent (5%) or greater of the total operating time for the 

reporting period, the summary report form and the excess emission report described in 

section (b) above shall both be submitted.

Figure 1 – Summary Report – Excess Emission and Monitoring System Performance

The semiannual reports must be postmarked by the 30th day after the end of each six-month 

period.

Pollutant:

Reporting Period Dates: From ______ to ______

Emission Limitation:

Monitor Manufacturer and Model No.:

Date of Latest CEMS Certification or Audit:

Process Unit(s) Description:

Total Source Operating Time in Reporting Period:

Emission Data Summary

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 = % excess emissions

Total Boiler Operating Time

CEMS Performance Summary

3. CEMS downtime in reporting period due to:

a. Monitor equipment malfunctions.

b. Non-monitoring equipment malfunctions.

c. Quality assurance calibrations.

d. Other known causes.

e. Unknown causes.

4. Total CEMS Downtime when the boiler is operating (nearest quarter hour).

5. Total CEMS downtime when the boiler is operating x 100 = % downtime

Total Boiler Operating Time

6. Total boiler operating time (nearest quarter hour).
OP2953-06 F-1 Draft: 05/16/2011

Appendix F SO2 CEMS

Nothing in this appendix is intended to alter the requirements in the Acid Rain Appendix.

1. Pursuant to 40 CFR Part 75, the permittee shall calibrate, maintain, and operate continuous 

monitoring systems. Heat input shall be determined as required in the 40 CFR Part 75, Appendix F 

and the NOx CEMS Appendix.

Except for system breakdowns, repairs, calibration checks, and zero and span adjustments required 

pursuant to 40 CFR Part 75, all continuous monitoring systems shall be in continuous operation.

2. The permittee shall maintain records for a minimum of five years of the log sheets, computerized 

data, analysis, and calculations used to prepare the required reports.

3. The permittee shall submit reports to the Department containing the information:

a. The permittee shall maintain records of the occurrence and duration of any startup, shutdown, or 

malfunction in the operation of an affected facility; any malfunction of the air pollution control 

equipment; or any periods during which the continuous monitoring system is inoperative.

b. The permittee shall submit an excess emissions and monitoring systems performance report 

and/or a summary report form (see paragraph (c) below) to the Department. Written reports of 

excess emissions greater than 2 lbs of SO2/mmBtu shall include the following information:

i. The magnitude of excess emissions, any conversion factor(s) used, and the date and time 

of commencement and completion of each time period of excess emissions. The process 

operating time during the reporting period.

ii. Any periods of time when the monitor range is exceeded. This shall include the date and 

time of commencement and completion of each time period the monitor is exceeding the 

range. The process operating time during the reporting period. These periods shall be 

considered periods of excess emissions.

iii. 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 

malfunctions (if known), the corrective action taken or preventative measures adopted.

iv. The date and time identifying each period during which the continuous monitoring 

system was inoperative except for zero and span checks and the nature of the system 

repairs and adjustments.

v. When no excess emissions have occurred or the continuous monitoring system(s) have 

not been inoperative, repaired, or adjusted, such information shall be stated in the report.

c. The summary report form shall contain the information and be in the format shown in Figure 1. 

The summary report form shall be submitted:

i. If the total duration of excess emissions for the reporting period is less than one percent 

(1%) of the total operating time for the reporting period and CEMS downtime for the 

reporting period is less than five percent (5%) of the total operating time for the reporting 

period, only the summary report form shall be submitted and the excess emission report 

described in section (b) above need not be submitted unless requested.
OP2953-06 F-2 Draft: 05/16/2011

ii. If the total duration of excess emissions for the reporting period is one percent (1%) or 

greater of the total operating time for the reporting period or the total CEMS downtime 

for the reporting period is five percent (5%) or greater of the total operating time for the 

reporting period, the summary report form and the excess emission report described in 

section (b) above shall both be submitted.

Figure 1 – Summary Report – Gaseous Excess Emission and Monitoring System Performance 

The semiannual reports must be postmarked by the 30th day after the end of each six-month 

period.

Pollutant:

Reporting Period Dates: From ______ to ______

Emission Limitation:

Monitor Manufacturer and Model No.:

Date of Latest CEMS Certification or Audit:

Process Unit(s) Description:

Total Source Operating Time in Reporting Period:

Emission Data Summary

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

f. Startup/shutdown.

g. Control equipment problems.

h. Process problems.

i. Other known causes.

j. Unknown causes.

2. Total duration of excess emissions.

3. Total duration of excess emissions x 100 = % excess emissions

Total Boiler Operating Time

CEMS Performance Summary

1. CEMS downtime in reporting period due to:

f. Monitor equipment malfunctions.

g. Non-monitoring equipment malfunctions.

h. Quality assurance calibrations.

i. Other known causes.

j. Unknown causes.

2. Total CEMS Downtime when the boiler is operating (nearest quarter hour).

3. Total CEMS downtime when the boiler is operating x 100 = % downtime

Total Boiler Operating Time

4. Total boiler operating time (nearest quarter hour).
OP2953-06 F-3 Draft: 05/16/2011

4. The permittee shall submit quarterly reports to the Department containing the following information 

for each month of the quarter:

a. Tons of emissions calculated as the sum of Eh = K x Ch x Qh, where Eh = emission rate (lb/hr), K 

= 1.66 x 10-7(lb/scf)/ppm(SO2), Ch = measured pollutant concentration (ppmwet), and Qh = 

measured stack gas flow rate (SCFHwet); and

b. A summary report including the information identified in 40 CFR 75.64(a)(2) in writing, which 

includes:

- Tons (rounded to the nearest tenth) of SO2 emitted during the quarter and cumulative SO2

emissions for calendar year.

The quarterly reports must be postmarked by the 30th day after the end of the calendar quarter.

5. The permittee shall submit copies of all RATAs performed to the Department in accordance with 

ARM 17.8.106, Source Testing Protocol.

6. The permittee shall submit copies of each monitoring plan revision, which results in the need to 

recertify the CEMS.
OP2953-06 G-1 Draft: 05/16/2011

Appendix G NOx CEMS

Nothing in this appendix is intended to alter the requirements in the Acid Rain Appendix.

1. Except for system breakdowns, repairs, calibration checks, and zero and span adjustments required 

pursuant to 40 CFR Part 75, all continuous monitoring systems shall be in continuous operation.

2. The permittee shall conduct a "Standard Practice for Ultimate Analysis of Coal and Coke", ASTM 

D5291-92, at a minimum of once per year for each type of coal used.

3. The permittee shall determine the gross calorific value (GCV) of the fuels using ASTM D2015-91, 

"Standard Test Method for Gross Calorific Value of Coal and Coke by the Adiabatic Bomb 

Calorimeter" or other method as identified in 40 CFR Part 75, Appendix F, 3.3.6.2, at a minimum of 

once per year for each type of coal used.

4. The permittee shall conduct a weekly fuel analysis using ASTM D4239-85 or other method approved 

by the Department.

5. The permittee shall maintain records for a minimum of five years of the log sheets, computerized 

data, analysis, and calculations used to prepare the required reports.

6. The permittee shall submit reports to the Department containing the following information:

a. The permittee shall maintain records of the occurrence and duration of any startup, shutdown, or

malfunction in the operation of an affected facility; any malfunction of the air pollution control 

equipment; or any periods during which the continuous monitoring system is inoperative.

b. The permittee shall submit a monitoring system performance report to the Department in the 

format shown in Figure 1.
OP2953-06 G-2 Draft: 05/16/2011

Figure 1 – Summary Report – Gaseous Excess Emission and Monitoring System Performance

The reports shall only be required Semiannual for each six-month period. The semiannual reports 

must be postmarked by the 30th day after the end of each six-month period.

7. The permittee shall submit quarterly reports to the Department containing the following information 

for each month of the quarter:

a. Monthly average coal analysis

b. Coal consumption

Pollutant:

Reporting Period Dates: From ______ to ______

Emission Limitation:

Monitor Manufacturer and Model No.:

Date of Latest CEMS Certification or Audit:

Process Unit(s) Description:

Total Source Operating Time in Reporting Period:

Emission Data Summary

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

k. Startup/shutdown.

l. Control equipment problems.

m. Process problems.

n. Other known causes.

o. Unknown causes.

2. Total duration of excess emissions.

3. Total duration of excess emissions x 100 = % excess emissions

Total Boiler Operating Time

CEMS Performance Summary

1. CEMS downtime in reporting period due to:

k. Monitor equipment malfunctions.

l. Non-monitoring equipment malfunctions.

m. Quality assurance calibrations.

n. Other known causes.

o. Unknown causes.

2. Total CEMS Downtime when the boiler is operating (nearest quarter hour).

3. Total CEMS downtime when the boiler is operating x 100 = % downtime

Total Boiler Operating Time

4. Total boiler operating time (nearest quarter hour).
OP2953-06 G-3 Draft: 05/16/2011

c. Other fuels combusted and the amount

d. Tons of emissions calculated as the sum of Eh = K x Ch x Qh, where Eh = emission rate (lb/hr), K 

= 1.19 x 10-7(lb/scf)/ppm (NOx), Ch = measured pollutant concentration (ppmwet), and Qh = 

measured stack gas flow rate (SCFHwet); and

e. A summary report including the information identified in 40 CFR 75.64(a)(3) through (5) in 

writing which includes:

i. Average NOx emission rate (lbs/mmBtu, rounded to the nearest hundredth) during the 

quarter and cumulative NOx emission rate for calendar year.

ii. Tons of CO2 emitted during quarter and cumulative CO2 for calendar year.

iii. Total heat input (mmBtu) for quarter and cumulative heat input for calendar year.

The quarterly reports must be postmarked by the 30th day after the end of the calendar quarter.

8. The permittee shall submit copies of all RATAs performed to the Department in accordance with 

ARM 17.8.106, Source Testing Protocol.

9. The permittee shall submit copiers of each monitoring plan revision, which results in the need to 

recertify the CEMS.
OP2953-06 H-1 Draft: 05/16/2011

Appendix H ACID RAIN
OP2953-06 H-2 Draft: 05/16/2011
OP2953-06 H-3 Draft: 05/16/2011
OP2953-06 I-1 Draft: 05/16/2011

Appendix I SO2 SIP

Although the hard copy of Appendix I has been removed from the permit, the contents of Appendix I, 

SO2 Control Plan remain as applicable requirements as stated in the Title V Operating Permit OP2953-05. 

To receive a hard copy of this appendix, please contact one of the following:

Montana 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

Facility Contact Person – Tom Olson

JE Corette Steam Electric Station

PPL Montana, LLC

P.O. Box 30495

Billings, MT 59107

Phone #: (406) 896-4704

OR

Technical Contact Person – Steve Christian

JE Corette Steam Electric Station

C/O Environmental Engineering Department

PPL Montana, LLC

P.O. Box 38

Colstrip, MT 59323

Phone #: (406) 748-5019
OP2953-06 J-1 Draft: 05/16/2011

Appendix J OPERATION MODIFICATION PLAN-REVISION 4

Although the hard copy of Appendix J has been removed from the permit, the contents of Appendix J, 

Operation Modification Plan – Revision 4 remain as applicable requirements as stated in the Title V 

Operating Permit #OP2953-05. To receive a hard copy of this appendix, please contact one of the 

following:

Montana 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

Facility Contact Person – Tom Olson

JE Corette Steam Electric Station

PPL Montana, LLC

P.O. Box 30495

Billings, MT 59107

Phone #: (406) 896-4704

OR

Technical Contact Person – Steve Christian

JE Corette Steam Electric Station

C/O Environmental Engineering Department

PPL Montana, LLC

P.O. Box 38

Colstrip, MT 59323

Phone #: (406) 748-5019
OP2953-06 K-1 Draft: 05/16/2011

Appendix K Compliance Assurance Monitoring (CAM) Plan

Monitoring Approach for PM for PPLM JECSES

A. General Criteria

 1. Performance Indicator Stack Opacity

 2. Measurement Approach COMS

 3. Indicator Range A particulate matter excursion is defined as when a 

3-hour Rolling average opacity is > 23%

B. Performance Criteria

 1. Data Representativeness Opacity is measured in the stack

 2. Verification of Operational Status An operator on a continuous basis monitors stack 

opacity in the Control Room, Data is recorded and 

stored in a Data Acquisition System (DAS).

 3. QA/QC Practices & Criteria As per the PPLMT CEMS QA Plan:

 Daily – COMS Calibration Drift

 Quarterly – Opacity Accuracy Audit

As per OM Plan:

 Semi-annual – Reference Method 5 Test

 4. Monitoring Frequency

 Data Collection Procedures

 Averaging Period

Opacity is measured on a continuous basis

Opacity data is collected & stored in the DAS

Minute (6 minute, hourly, 3-hour, and daily 

averages are calculated).

 5. Exceedance/Excursion Reporting

 Particulate Excursion

6-minute average opacity excesses > 40%

Hour Avg > 23%

Daily avg. > 17%

Reporting is on a quarterly basis

3-hour rolling average opacity of > 23% are 

reported on a quarterly basis.

 6. Plant Operational Assessment Parameters Flue Gas Exit Gas Temperature, <270o F

Total ESP Powers (KVA), Minimum 110

Coal Ash Content (lbs/mmBtu), <13.5

Although the complete hard copy of Appendix K is not included in the permit, the contents of Appendix 

K, PPL’s CAM Plan remain as applicable requirements as stated in the Title V Operating Permit 

#OP2953-05. 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

Facility Contact Person – Tom Olson

JE Corette Steam Electric Station

PPL Montana, LLC

P.O. Box 30495

Billings, MT 59107

Phone #: (406) 896-4704
OP2953-06 K-2 Draft: 05/16/2011

OR

Technical Contact Person – Steve Christian

JE Corette Steam Electric Station

C/O Environmental Engineering Department

PPL Montana, LLC

P.O. Box 38

Colstrip, MT 59323

Phone #: (406) 748-5019
OP2953-06 L-1 Draft: 05/16/2011

Appendix L Mercury Emissions Monitoring System (MEMS)

MEMS

a. PPLM shall install, calibrate, certify, maintain, and operate an MEMS to monitor and record the 

rate of mercury emissions discharged into the atmosphere from all mercury emitting generating 

units (units) as defined in the Administrative Rules of Montana 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 demonstrate compliance with the emission limitations 

contained in Section III.H.16.

b. PPLM 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 PPLM makes a replacement, modification, 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, modifications 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.
OP2953-06 L-2 Draft: 05/16/2011

(b) Mercury emission control summary including a description of control strategies, 

equipment, and design process rates.

(c) MEMS description, including:

(i) Identification and description of each monitoring component in the MEMS including 

manufacturer and model identifications; monitoring method descriptions; and normal 

operating scale and units descriptions. Descriptions 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, constants, 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 applicable and as defined in 40 CFR 75 Appendix 

A, 2.1.7.

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

c. PPLM shall submit written, Quarterly Mercury Monitoring 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 emission 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 defined as those emissions calculated on a rolling 

12-month basis which are greater than the limitation established in Section III.H.16.
OP2953-06 L-3 Draft: 05/16/2011

(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 were 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 downtime) during the reporting quarter. The 

percentage of monitor downtime in each calendar quarter shall be calculated according to 

the following formula:

 

% 100

OpHours

MEMSDownHours MEMSDowntime 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 monitor 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 for the system downtime, and any necessary 

corrective actions that were taken. In addition, the report shall describe the values used 

for any periods when missing data substitution 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.
OP2953-06 L-4 Draft: 05/16/2011

(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:

(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 requirements, 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 substituted in accordance with 40 CFR 75.38, the addon mercury emission controls were 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 the Department within 30 days following the end 

of 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. PPLM shall maintain a file of all measurements and performance testing results from the MEMS; all 

MEMS performance evaluations; all MEMS or monitoring 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 and reports. PPLM shall make these records available for inspection 

by the Department and shall supply these records to the Department upon request.