An official website of the United States government.

We've made some changes to EPA.gov. If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

EPA Approved Statutes and Regulations in the Colorado SIP

§52.320   Identification of plan.

(a) Purpose and scope. This section sets forth the applicable State Implementation Plan for Colorado under section 110 of the Clean Air Act, 42 U.S.C. 7410 and 40 CFR part 51 to meet national ambient air quality standards or other requirements under the Clean Air Act.

(b) Incorporation by reference. (1) Material listed in paragraphs (c) and (d) of this section with an EPA approval date prior to June 1, 2015, was approved for incorporation by reference by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Material is incorporated as submitted by the state to EPA, and notice of any change in the material will be published in the Federal Register. Entries for paragraphs (c) and (d) of this section with EPA approval dates after June 1, 2015, will be incorporated by reference in the next update to the SIP compilation.

(2) EPA Region 8 certifies that the rules/regulations provided by EPA in the SIP compilation at the addresses in paragraph (b)(3) of this section are an exact duplicate of the officially promulgated state rules/regulations which have been approved as part of the State Implementation Plan as of June 1, 2015.

(3) Copies of the materials incorporated by reference may be inspected at the Environmental Protection Agency, Region 8, 1595 Wynkoop Street, Denver, Colorado, 80202-1129; Air and Radiation Docket and Information Center, U.S. Environmental Protection Agency, West Building, 1301 Constitution Ave. NW., Washington, DC 20460; and, the National Archives and Records Administration (NARA). For information on the availability of materials from the docket in the EPA Headquarters Library, please call the Office of Air and Radiation (OAR) at (202) 566-1742. For information on the availability of this material at NARA, call (202) 741-6030, or go to http://www.archives.gov/federal-register/cfr/ibr-locations.html. Copies of the Colorado regulations we have approved are also available at http://www.epa.gov/region8/air/sip.html.

Table C—EPA-Approved Colorado Statutes

Title State effective date EPA Effective date Final rule citation/date Comments
5 CCR 1001-01, Procedural Rules
State Implementation Plan 3/30/1998 5/10/2012 77 FR 21451, 04/10/12  
5 CCR 1001-02, Common Provisions Regulation
I. Definitions, Statement of Intent, and General Provisions Applicable to all Emission Control Regulations adopted by the Colorado Air Quality Control Commission 1/30/10
12/15/10
2/24/16 81 FR 3963,
1/25/16
Except I.G. Definitions, “Construction” and “Day”
II. General 1/30/10 2/24/16 81 FR 3963,
1/25/16
Except II.I; II.J.5.
5 CCR 1001-03, Regulation Number 1, Emission Control for Particulate Matter, Smoke, Carbon Monoxide, and Sulfur Oxides
Definitions 10/2/2005 2/17/2012 77 FR 2466, 01/18/12  
I. Applicability: Referenced Federal Regulations 10/2/2005 2/17/2012 77 FR 2466, 01/18/12  
II. Smoke and Opacity 10/2/2005 2/17/2012 77 FR 2466, 01/18/12  
III. Particulate Matter 10/2/2005 2/17/2012 77 FR 2466, 01/18/12  
IV. Continuous Emission Monitoring Requirements for New or Existing Sources 10/2/2005 2/17/2012 77 FR 2466, 01/18/12  
V. Emission Standards for Existing Iron and Steel Plant Operations 10/2/2005 2/17/2012 77 FR 2466, 01/18/12  
VI. Sulfur Dioxide Emission Regulations 10/2/2005 2/17/2012 77 FR 2466, 01/18/12  
VII. Emission Regulations for Certain Electric Generating Stations Owned and Operated by the Public Service Company of Colorado 10/2/2005 2/17/2012 77 FR 2466, 01/18/12  
VIII. Restrictions on the Use of Oil as a Backup Fuel 10/2/2005 2/17/2012 77 FR 2466, 01/18/12  
IX. Emission Regulations Concerning Areas Which Are Nonattainment for Carbon Monoxide—Refinery Fluid Bed Catalytic Cracking Units: 10/2/2005 2/17/2012 77 FR 2466, 01/18/12  
Appendix A, Method of Measuring Opacity from Fugitive Particulate Emission Sources 5/30/1982 1/2/1987 51 FR 43609, 12/03/86  
Appendix B, Method of Measurement of Off-Property Transport of Fugitive Particulate Emissions 5/30/1982 1/2/1987 51 FR 43609, 12/03/86  
5 CCR 1001-05, Regulation Number 3, Part A, Concerning General Provisions Applicable to Reporting and Permitting
I. Applicability 12/15/2010
12/15/2011
2/15/2013
2/24/16 81 FR 3963,
1/25/16
Except I.B.31.c. and I.B.31.d.
II. Air Pollutant Emission Notice (APEN) Requirements 10/15/2014 11/13/2017 82 FR 47380, 10/12/2017  
III. Administrative Permit Amendment Procedures 4/30/2008 3/17/2014 79 FR 8632, 02/13/14  
IV. Operational Flexibility 4/30/2008 3/17/2014 79 FR 8632, 02/13/14  
V. Certification and Trading of Emission Reduction Credits Offset and Netting Transactions 12/15/2010
2/15/2013
2/24/16 81 FR 3963,
1/25/16
 
VI. Fees 12/15/2010
2/15/2013
2/24/16 81 FR 3963,
1/25/16
 
VII. Confidential Information or Data Contained in Air Pollutant Emission Notices, Permit Applications, or Reports Submitted Pursuant to Part C, Section V.C.6 4/30/2008 3/17/2014 79 FR 8632, 02/13/14  
VIII. Technical Modeling and Monitoring Requirements 12/15/2010 2/24/16 81 FR 3963,
1/25/16
 
Appendix A, Method For Determining De Minimis Levels For Non-Criteria Reportable Pollutants 10/15/2014 11/13/2017 82 FR 47380, 10/12/2017  
Appendix B, Non-criteria Reportable Pollutants (Sorted by BIN) 12/15/2010
2/15/2013
2/24/16 81 FR 3963,
1/25/16
 
5 CCR 1001-05, Regulation Number 3, Part B, Concerning Construction Permits
I. Applicability 4/30/2008 3/17/2014 79 FR 8632, 02/13/14  
II. General Requirements for Construction Permits 12/15/2010
12/15/2011
2/24/2016 81 FR 3963,
1/25/16
 
III. Construction Permit Review Procedures 10/15/2014 11/13/2017 82 FR 47380, 10/12/2017  
5 CCR 1001-05, Regulation Number 3, Part D, Concerning Major Stationary Source New Source Review and Prevention of Significant Deterioration
I. Applicability 12/15/2010
2/15/2013
2/24/16 81 FR 3963,
1/25/16
 
II. Definitions 10/15/2014 11/13/2017 82 FR 47380, 10/12/2017 Except II.A.26.d., the phrase “and only PM2.5 emissions can be used to evaluate the net emissions increase for PM2.5
III. Permit Review Procedures 12/15/2011 2/24/16 81 FR 3963,
1/25/16
 
IV. Public Comment Requirements 4/30/2008 3/17/2014 79 FR 8632, 02/13/14  
V. Requirements Applicable to Nonattainment Areas 12/15/2011
2/15/2013
2/24/16 81 FR 3963,
1/25/16
 
VI. Requirements applicable to attainment and unclassifiable areas and pollutants implemented under Section 110 of the Federal Act (Prevention of Significant Deterioration Program) 10/15/2014 11/13/2017 82 FR 47380, 10/12/2017 Except for VI.A.1.c., the phrase “for phases that commence construction more than 18 months after the initial granting of the permit”; VI.A.2., the phrase “either Section VI.A.2.a. or b., as clarified for any relevant air pollutant, in Section VI.A.2.c.”; VI.A.2.c.; VI.B.3.a.(iii) in reference to PM2.5 monitoring exemption; and VI.B.3.d.
VII. Negligibly Reactive Volatile Organic Compounds (NRVOCs) 4/30/2008 3/17/2014 79 FR 8632, 02/13/14  
VIII. Area Classifications 4/30/2008 3/17/2014 79 FR 8632, 02/13/14  
IX. Redesignation 4/30/2008 3/17/2014 79 FR 8632, 02/13/14  
X. Air Quality Limitations 12/15/2011 2/24/16 81 FR 3963,
1/25/16
 
XI. Exclusions From Increment Consumption 4/30/2008 3/17/2014 79 FR 8632, 02/13/14  
XII. Innovative Control Technology 4/30/2008 3/17/2014 79 FR 8632, 02/13/14  
XIII. Federal Class I Areas 12/15/2011 2/24/16 81 FR 3963,
1/25/16
 
XIV. Visibility 12/15/2010 2/24/16 81 FR 3963,
1/25/16
 
XV. Actuals PALs 12/15/2010 2/24/16 81 FR 3963,
1/25/16
 
5 CCR 1001-05, Regulation Number 3, Part F, Regional Haze Limits—Best Available Retrofit Technology (BART) and Reasonable Progress (RP)
VI. Regional Haze Determinations 2/14/2017 8/6/2018 83 FR 31332, 7/5/2018  
VII. Monitoring, Recordkeeping, and Reporting for Regional Haze Limits 2/14/2011 1/30/2013 77 FR 76871, 12/31/12  
5 CCR 1001-06, Regulation Number 4, New Wood Stoves and the Use of Certain Woodburning Appliances During High Pollution Days
I. Definitions 8/30/1993 5/19/1997 62 FR 18716, 04/17/97  
II. Requirements for Sale and Installation of Wood Stoves 8/30/1993 5/19/1997 62 FR 18716, 04/17/97  
III. Approval Procedure for Pellet Stoves 8/30/1993 5/19/1997 62 FR 18716, 04/17/97  
IV. Enforcement 8/30/1993 5/19/1997 62 FR 18716, 04/17/97  
V. List of Certified Wood Stoves 8/30/1993 5/19/1997 62 FR 18716, 04/17/97  
VI. High Pollution Days 8/30/1993 5/19/1997 62 FR 18716, 04/17/97  
VII. Requirements for Installation of Fireplaces 8/30/1993 5/19/1997 62 FR 18716, 04/17/97  
VIII. Implementation of Local Control Strategies 8/30/1993 5/19/1997 62 FR 18716, 04/17/97  
IX. References 8/30/1993 5/19/1997 62 FR 18716, 04/17/97  
5 CCR 1001-08, Regulation Number 6, Standards of Performance for New Stationary Sources
IV. Standards of Performance for New Sources of Sulfur Dioxide 3/30/1981 1/6/1982 46 FR 59536, 12/07/81  
5 CCR 1001-09, Regulation Number 7, Control of Ozone Via Ozone Precursors (Emissions of Volatile Organic Compounds and Nitrogen Oxides)
I. Applicability 1/14/2017 8/2/2018 83 FR 31068, 7/3/2018 Previous SIP approval 08/05/11 except for I.A.1.b, I.B.1.b, I.B.2.b, and I.B.2.d; nonsubstantive changes to I.A.1.a. and I.A.1.c. approved 7/3/2018.
II. General Provisions 1/14/2017 8/2/2018 83 FR 31068, 7/3/2018 Previous SIP approval 8/5/2011 except for II.A.12, II.C.1, and the repeal of previously approved II.D; nonsubstantive changes to II.D approved 7/3/2018.
III. General Requirements for Storage and Transfer of Volatile Organic Compounds 1/30/2009 9/6/2011 76 FR 47443, 08/05/11  
IV. Storage of Highly Volatile Organic Compounds 1/30/2009 9/6/2011 76 FR 47443, 08/05/11  
V. Disposal of Volatile Organic Compounds 1/30/2009 9/6/2011 76 FR 47443, 08/05/11  
VI. Storage and Transfer of Petroleum Liquid 1/14/2017 8/2/2018 83 FR 31068, 7/3/2018 Previous SIP approval 8/5/2011; nonsubstantive changes to VI.B.2.a.(iii)(B) approved 7/3/2018.
VII. Crude Oil 1/14/2017 8/2/2018 83 FR 31068, 7/3/2018 Previous SIP approval 8/5/2011; nonsubstantive changes to VII.C 7/3/2018.
VIII. Petroleum Processing and Refining 1/14/2017 8/2/2018 83 FR 31068, 7/3/2018 Previous SIP approval 8/5/2011; nonsubstantive changes to VIII.C.4.a.(i)(A)(6) 7/3/2018.
IX. Surface Coating Operations 1/14/2017 8/2/2018 83 FR 31068, 7/3/2018 Previous SIP approval 8/5/2011; nonsubstantive changes to IX.A.3.c., IX.A.5.a.-d., and IX.A.12.a. 7/3/2018.
X. Use of Solvents for Degreasing and Cleaning 1/30/2009 9/6/2011 76 FR 47443, 08/05/11  
XI. Use of Cutback Asphalt 1/30/2009 9/6/2011 76 FR 47443, 08/05/11  
XII. Volatile Organic Compound Emissions From Oil and Gas Operations 1/14/2017 3/4/2007 83 FR 31068, 7/3/2018 Previous SIP approval 2/13/2008; substantive changes to Section XII; state-only provisions excluded 7/3/2018.
XIII. Graphic Arts 1/30/2009 8/2/2018 76 FR 47443, 08/05/11  
XIV. Pharmaceutical Synthesis 1/30/2009 9/6/2011 76 FR 47443, 08/05/11  
XV. Control of Volatile Organic Compound Leaks from Vapor Collection Systems and Vapor Control Systems Located at Gasoline Terminals, Gasoline Bulk Plants, and Gasoline Dispensing Facilities 1/30/2009 9/6/2011 76 FR 47443, 08/05/11  
XVI. Control of Emissions from Stationary and Portable Engines in the 8-Hour Ozone Control Area 1/30/2009 9/6/2011 70 FR 48652, 08/05/11  
XVII.E.3.a., (Regional Haze SIP) Rich Burn Reciprocating Internal Combustion Engines 2/14/2011 1/30/2013 77 FR 76871, 12/31/12  
Appendix A. Criteria for Control of Vapors from Gasoline Transfer to Storage Tanks 10/30/1989 6/29/1995 60 FR 28055, 05/30/95  
Appendix B. Criteria for Control of Vapors from Gasoline Transfer at Bulk Plants (Vapor Balance System) 10/30/1989 6/20/1995 60 FR 28055, 05/30/95  
Appendix C. Minimum Cooling Capacities for Refrigerated Freeboard Chillers on Vapor Degreasers 5/22/1980 4/13/1981 46 FR 16687, 03/13/81  
Appendix D. Test Procedures for Annual Pressure/Vacuum Testing of Gasoline Transport Tanks 10/30/1989 6/29/1995 60 FR 28055, 05/30/95  
Appendix E. Emission Limit Conversion Procedure 10/30/1989 6/29/1995 60 FR 28055, 05/30/95  
5 CCR 1001-12, Regulation Number 10, Criteria for Analysis of Conformity
I. Requirement to Comply with the Federal Rule 1/30/2012 4/3/2014 79 FR 12079, 03/04/14  
II. Definitions 1/30/2012 4/3/2014 79 FR 12079, 03/04/14  
III. Interagency Consultation 1/30/2012 4/3/2014 79 FR 12079, 03/04/14  
IV. Emission reduction credit for certain control measures 1/30/2012 4/3/2014 79 FR 12079, 03/04/14  
V. Enforceability of design concept and scope and project-level mitigation and control measures 1/30/2012 4/3/2014 79 FR 12079, 03/04/14  
5 CCR 1001-13, Regulation Number 11, Motor Vehicle Emissions Inspection Program—Part A, General Provisions, Area of Applicability, Schedules for Obtaining Certification of Emissions Control, Definitions, Exemptions, and Clean Screening/Remote Sensing
I. Applicability 2/15/2013
12/30/2013
11/21/2016 81 FR 72720, 10/21/2016  
II. Definitions 11/30/2014 3/11/2019 84 FR 2449, 2/7/2019  
III. Exemption from Section 42-4-314, C.R.S. for Department of Defense Personnel Participating in the Privately Owned Vehicle Import Control Program 5/31/2004 9/19/2005 70 FR 48652, 08/19/2005  
IV. Clean Screen/Remote Emissions Sensing 1/14/2017 8/2/2018 83 FR 31068, 7/3/2018  
5 CCR 1001-13, Regulation Number 11, Motor Vehicle Emissions Inspection Program—Part B, Standards and Procedures for the Approval, Operation, Gas Span Adjustment, Calibration and Certification of the Division Approved Test Analyzer Systems for Use in the Basic and Enhanced Areas and Test Analyzer Systems for Licensed Dealers in the Enhanced Area
I. Approval of the Colo '94 Test Analyzer Systems 5/31/2004 9/19/2005 70 FR 48652, 08/19/2005  
II. Application for Approval of Colo '94 Test Analyzer Systems Equipment Manufacturers 5/31/2004 9/19/2005 70 FR 48652, 08/19/2005  
III. Performance and Design Specification for the Colo '94 Exhaust Gas Analyzers 5/31/2004 9/19/2005 70 FR 48652, 08/19/2005  
IV. Span Gases For Use With Colo '94 Test Analyzer Systems 11/30/2014 3/11/2019 84 FR 2449, 2/7/2019  
V. Documentation, Logistics, and Warranty Requirements 5/31/2004 9/19/2005 70 FR 48652, 08/19/2005  
VI. Calibration of Colorado '94 Test Analyzer Systems 5/31/2004 9/19/2005 70 FR 48652, 08/19/2005  
VII. Approval of the Colorado Automobile Dealers Transient Mode Test Analyzer System 5/31/2004 9/19/2005 70 FR 48652, 08/19/2005  
VIII. Applications for Approval of the Colorado Automobile Dealers Transient Mode Test Analyzer System 5/31/2004 9/19/2005 70 FR 48652, 08/19/2005  
IX. Approval of the Colorado On-Board Diagnostic (OBD) Test Analyzer System 2/15/2013 11/21/2016 81 FR 72720, 10/21/2016  
X. The Colorado On-Board Diagnostics (OBD) Test Analyzer System 2/15/2013 11/21/2016 81 FR 72720, 10/21/2016  
5 CCR 1001-13, Regulation Number 11, Motor Vehicle Emissions Inspection Program—Part C, Inspection Procedures and Requirements for Exhaust Emissions, Fuel Evaporation Control, Visible Smoke Emissions, Emissions Control Systems, Chlorofluorocarbon Leak Detection; and Practices to Ensure Proper Emissions Related Adjustments and Repairs
I. Pre-inspection Requirements 2/15/2013 11/21/2016 81 FR 72720, 10/21/2016  
II. Exhaust Emissions Inspection Procedures 11/30/2014, 9/30/2017 3/11/2019 84 FR 2449, 2/7/2019  
III. Emissions Control Systems Inspection Procedures 2/15/2013 11/21/2016 81 FR 72720, 10/21/2016  
IV. On-Board Diagnostic II Inspection Procedures 2/15/2013 11/21/2016 81 FR 72720, 10/21/2016  
V. Evaporative Fuel Control Inspection Procedures 2/15/2013 11/21/2016 81 FR 72720, 10/21/2016  
VI. Free Reinspection 5/31/2004 9/19/2005 70 FR 48652, 08/19/05  
VII. Repair Information 5/31/2004 9/19/2005 70 FR 48652, 08/19/05  
VIII. Certification of Emissions Control 11/30/2014 3/11/2019 84 FR 2449, 2/7/2019  
IX. [Reserved]        
X. Emissions Related Repairs 11/30/2014 3/11/2019 84 FR 2449, 2/7/2019  
XI. Engine Changes 5/31/2004 9/19/2005 70 FR 48652, 08/19/05  
XII. Clean Screen Inspection Program Procedures 11/30/2014 3/11/2019 84 FR 2449, 2/7/2019  
5 CCR 1001-13, Regulation Number 11, Motor Vehicle Emissions Inspection Program—Part D, Qualification and Licensing of Emissions Mechanics, Emissions Inspectors and Clean Screen Inspectors; Licensing of Emissions Inspection and Readjustment Stations, Inspection-Only Stations, Inspection-Only Facilities, Fleets, Motor Vehicle Dealer Test Facilities and Enhanced Inspection Centers; Qualification of Clean Screen Inspection Sites; and Registration of Emissions Related Repair Facilities and Technicians
I. Licensing of Emissions Inspection and Readjustment Stations, Inspection-Only Stations, Inspection-Only Facilities, Enhanced Inspection Centers, Fleet Inspection Stations and Motor Vehicle Dealer Test Facilities 9/30/2017 3/11/2019 84 FR 2449, 2/7/2019  
II. Qualification and Licensing of Emission Mechanics, and Emissions Inspectors 5/31/2004 9/19/2005 70 FR 48652, 08/19/05  
III. Registration of Emissions Related Repair Facilities 5/31/2004 9/19/2005 70 FR 48652, 08/19/05  
IV. Requirements for Clean Screen/Remote Sensing Sites 5/31/2004 9/19/2005 70 FR 48652, 08/19/05  
V. Qualification of Clean Screen Emissions Inspectors 5/31/2004 9/19/2005 70 FR 48652, 08/19/05  
VI. Requalification Requirements for all Clean Screen Emissions Inspectors 5/31/2004 9/19/2005 70 FR 48652, 08/19/05  
VII. Transmittal of Letters of Qualification and Issuance of Clean Screen Inspector Licenses 5/31/2004 9/19/2005 70 FR 48652, 08/19/05  
VIII. Lapse of Certificate of Qualification for Clean Screen Inspector 5/31/2004 9/19/2005 70 FR 48652, 08/19/05  
IX. Program License Application Performance Review Criteria 5/31/2004 9/19/2005 70 FR 48652, 08/19/05  
5 CCR 1001-13, Regulation Number 11, Motor Vehicle Emissions Inspection Program—Part E, Prohibited Acts and Penalties to Ensure Proper Inspection Procedures, Adherence to Prescribed Procedures and Effective Emissions Related Repairs
I. The Grounds Upon Which The License Of An Emissions Mechanic, Emissions Inspector Or Any Type Of AIR Program Inspection Business May Be Suspended, For A Period Of Time Not Less Than Six Months, Or Revoked 5/31/2004 9/19/2005 70 FR 48652, 08/19/05  
5 CCR 1001-13, Regulation Number 11, Motor Vehicle Emissions Inspection Program—Part F, Maximum Allowable Emissions Limits for Motor Vehicle Exhaust, Evaporative and Visible Emissions for Light-Duty and Heavy-Duty Vehicles
I. The Idle Short Test Concentration Limits For Light-Duty Vehicles And Heavy-Duty Trucks Specified In Sections I (A) And II (A) Respectively Of This Part F Are Those Necessary To Comply With Emissions Reductions As The Program Matures 5/31/2004 9/19/2005 70 FR 48652, 08/19/05  
II. Heavy-Duty Vehicles (1978 and Earlier Greater Than 6000 lbs. GVWR) Subject to Idle Short Test(s) 5/31/2004 9/19/2005 70 FR 48652, 08/19/05  
III. Transient Test Mass Emissions Limits In Grams/Mile (GPM) 1/30/2006 1/22/2013 77 FR 75388, 12/20/12  
IV. Evaporative Emissions Control Standards 5/31/2004 9/19/2005 70 FR 48652, 08/19/05  
V. Visible Smoke 2/15/2013 11/21/2016 81 FR 72720, 10/21/2016  
VI. Clean Screen Program Maximum Allowable Emissions Limits 9/30/2017 3/11/2019 84 FR 2449, 2/7/2019  
VII. On-Board Diagnostic Inspection Passing Criteria 9/30/2017 3/11/2019 84 FR 2449, 2/7/2019  
5 CCR 1001-13, Regulation Number 11, Appendices
Appendix A, Technical Specifications 11/30/2014, 9/30/2017 3/11/2019 84 FR 2449, 2/7/2019  
5 CCR 1001-14, Emission Budgets for Nonattainment Areas in the State of Colorado
Budgets 8/30/1995 4/30/1998 63 FR 15294, 03/31/98  
5 CCR 1001-18, Regulation Number 16, Street Sanding Emissions
I. Street Sanding Materials Specifications 4/19/2001 10/16/2002 67 FR 58335, 09/16/02  
II. Street Sanding Requirements Specific to the Denver PM-10 Attainment/Maintenance Area 4/19/2001 10/16/2002 67 FR 58335, 09/16/02  
5 CCR 1001-20, Nonattainment-Attainment/Maintenance Areas
I. Pagosa Springs Attainment/Maintenance Area 5/30/2000 8/14/2001 66 FR 32556, 06/15/01  
II. Telluride Attainment/Maintenance Area 5/30/2000 8/14/2001 66 FR 32556, 06/15/01  
III. Aspen/Pitkin County PM-10 Attainment/Maintenance Area 2/28/2001 7/14/2003 68 FR 26212, 05/15/03  
IV. Lamar Attainment/Maintenance Area 12/30/2001 11/25/2005 70 FR 61563, 10/25/05  
V. Canon City PM-10 Nonattainment Area 12/30/1993 2/13/1995 59 FR 64332, 12/14/94  
VIII. Steamboat Springs PM10 Attainment/Maintenance Area 11/24/2004 12/30/2001 69 FR 62210, 10/25/04