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  2. Air Quality Implementation Plans

Previous Louisiana SIP-Approved Regulations

LAC Title 33. Environmental Quality Part III

Chapter 1. General Provisions

State citationTitle/subjectEPA Effective Start DateEPA Effective End DateComments
Section 101Authority, Matter Incorporated by Reference, and Permit Fee System1989-05-08 (LAc49)2011-08-03 
Section 103Scope and Severability of Air Regulations1989-05-08 (LAc49)2011-08-03 
Section 107Procedure for Handling Investigations, Complaints and Confidentiality1989-05-08 (LAc49)2011-08-03 
Section 109Necessary Changes for Approval of Compliance Schedules and Annual Report Requirements1989-05-08 (LAc49)2011-08-03 
Section 111 (v1989-1994)Definitions1989-05-08 (LAc49) and
1989-08-14 (LAc50) and
1994-06-06 (LAc60)
2011-08-03 
Section 111 (v2011)Definitions2011-08-04 (LAd34)2012-01-02 
Section 111 (v2012-2016)Definitions2012-01-03 (LAd39) and 2016-02-29 (LAd47)2017-09-27 

Chapter 2. Rules and Regulations for the Fee System of the Air Quality Control Programs

State citationTitle/subjectEPA Effective Start DateEPA Effective End DateComments
Chapter 65, Sections 6501-6523, LAc49, LAc61, LAc66LAC 33:III Ch 65 Rules and Regulations for the Fee System of the Air Quality Control Programs, SIP effective May 8, 1989 (LAc49) to June 19, 2016 (LAd48)May 8, 1989, (LAc49)June 19, 2016Replaced by LAC 33:III Chapter 2. Rules and Regulations for the Fee System of the Air Quality Control Program, approved by EPA April 21, 2016 (81 FR 23425) effective June 20, 2016 (LAd48), Regulations.gov docket EPA-R06-OAR-2016-0132 [LA051] -- See Chapter 2 in Current Louisiana SIP-Approved Regulations
Chapter 2, Section 223, LAc66Fee Schedule Listing12/22/95, (LAc66)June 19, 2016Replaced by LAC 33:III Chapter 2. Rules and Regulations for the Fee System of the Air Quality Control Program, approved by EPA April 21, 2016 (81 FR 23425) effective June 20, 2016 (LAd48), Regulations.gov docket EPA-R06-OAR-2016-0132 [LA051] -- See Chapter 2 in Current Louisiana SIP-Approved Regulations

Chapter 5. Permit Procedures

State citationTitle/subjectEPA Effective Start DateEPA Effective End DateComments
Section 501 (v1989)Scope and Applicability1989-05-08 (LAc49)2015-12-06 
Section 501 (v2015)Scope and Applicability2015-12-07 (LAd46)2016-08-16 
Section 501 (v2016)Scope and Applicability2016-08-16 (LAd50)2016-09-05 
Section 503Minor Source Permit Requirements1989-05-08 (LAc49)2016-09-05 
Section 504 (v1997-1999)Nonattainment New Source Review (NNSR) Procedures1997-11-10 (LAc68) and
1999-03-08 (LAd02)
2001-07-29 
Section 504 (v2001)Nonattainment New Source Review (NNSR) Procedures2001-07-30 (LAd07)2002-09-29 (LAd14) 
Section 504 (v2002)Nonattainment New Source Review (NNSR) Procedures2002-09-30 (LAd14)2015-12-06 
Section 504 (v2015)Nonattainment New Source Review (NNSR) Procedures2015-12-07 (LAd46)2016-09-05 
Section 505For Emissions Below PSD de minimus Levels1989-05-08 (LAc49) and
1992-05-05 (LAc58)
2011-08-03 
Section 506Clean Air Interstate Rule Requirements2007-09-18 (LAd24) and
2007-09-28 (LAd25)
2014-06-15 
Section 507Notification Requirement (for Emission Reduction)1989-05-08 (LAc49)2011-08-03 
Section 509 (v1989-91-96)Prevention of Significant Deterioration1989-05-08 (LAc49) and
1989-08-14 (LAc50) and
1991-07-01 (LAc57) and
1996-12-16 (LAc69)
2011-08-17 (LAd36 - Revised) 
Section 509 (v2011)Prevention of Significant Deterioration2011-08-18 (LAd36)2015-12-06 
Section 509 (v2015)Prevention of Significant Deterioration2015-12-07 (LAd46)2016-08-16 

Chapter 6. Regulations on Control of Emissions Through the Use of Emission Reduction Credits Banking

State citationTitle/subjectEPA Effective Start DateEPA Effective End DateComments
Section 601 (v1999)Background and Purpose1999-08-02 (LAd03)2002-09-26 (LAd12) 
Section 601 (v2002)Purpose2002-09-27 (LAd12)2016-09-05 
Section 603 (v1999)Applicability1999-08-02 (LAd03)2002-09-26 (LAd12) 
Section 603 (v2002)Applicability2002-09-27 (LAd12)2011-08-03 ?? 
Section 603 (v2015)Applicability2015-12-07 (LAd46)2016-09-05 
Section 605 (v1999)Definitions1999-08-02 (LAd03)2002-09-26 (LAd12) 
Section 605 (v2002)Definitions2002-09-27 (LAd12)2011-08-03 ?? 
Section 605 (v2002-2015)Definitions2002-09-27 (LAd12) and 2015-12-07 (LAd46)2016-09-05 
Section 607 (v1999)Stationary Point Source Emission Reductions1999-08-02 (LAd03)2002-09-26 (LAd12) 
Section 607 (v2002)Determination of Creditable Emission Reductions2002-09-27 (LAd12)2015-12-06 
Section 607 (v2015)Determination of Creditable Emission Reductions2015-12-07 (LAd46)2016-09-05 
Section 613 (v1999)ERC Bank Balance Sheet1999-08-02 (LAd03)2002-09-26 (LAd12) 
Section 613 (v2002)ERC Bank Recordkeeping and Reporting Requirements2002-09-27 (LAd12)2015-12-06 
Section 615 (v1999)Schedule for Submitting Applications1999-08-02 (LAd03)2002-09-26 (LAd12) 
Section 615 (v2002)Schedule for Submitting Applications2002-09-27 (LAd12)2015-12-06 
Section 615 (v2015)Schedule for Submitting Applications2015-12-07 (LAd46)2016-09-05 
Section 617 (v1999)Review and Approval of ERC Bank Balance Sheets1999-08-02 (LAd03)2002-09-26 (LAd12) 
Section 617 (v2002)Procedures for Review and Approval of ERCs2002-09-27 (LAd12)2011-08-03 ?? 
Section 619 (v1999)Registration of Emission Reduction Credit Certificates1999-08-02 (LAd03)2002-09-26 (LAd12) 
Section 619 (v2002)Emission Reduction Credit Bank2002-09-27 (LAd12)2016-09-05 
Section 621Protection of Banked ERCs1999-08-02 (LAd03)2002-09-26 (LAd12) 
Section 623Withdrawal, Use, and Transfer of Emission Reduction Credits1999-08-02 (LAd03)2002-09-26 (LAd12) 
Section 625Application and Processing Fees1999-08-02 (LAd03)2002-09-26 (LAd12) 

Chapter 7. Ambient Air Quality

State citationTitle/subjectEPA Effective Start DateEPA Effective End DateComments
Section 701Purpose and Information Regarding Standards for PM10, SO2, CO, Atmospheric Oxidants, NOx and Pb1989-05-08 (LAc49)2011-08-03 (LAd34 - Revised) 
Section 703Scope of Ambient Air Quality Standards for PM10, SO2, CO, Ozone, NOx, and Pb1989-05-08 (LAc49)?? 
Section 705Standards: Description of Ambient Air Quality Standards1989-05-08 (LAc49)? 
Section 707Degradation of Ambient Air Having Higher Quality than Set Forth in these Sections Restricted; SIP effective1989-05-08 (LAc49)? 
Section 709Measurement of Concentrations PM10, SO2, Carbon Monoxide, Atmospheric Oxidants, Nitrogen Oxides, and Lead1989-05-08 (LAc49) and 1989-08-14 (LAc50)2011-08-03 (LAd34 - Revised) 
Sections 701-711Ambient Air Quality2011-08-04 (LAd34)2016-02-28 
Table 1Primary Ambient Air Quality Standards1989-05-08 (LAc49) and 1989-08-14 (LAc50)2011-08-03LAd34 - Moved to Section 711 and revised [adds PM-2.5]
Table 1aSecondary Ambient Air Quality Standards1989-05-08 (LAc49) and 1989-08-14 (LAc50)2011-08-03LAd34 - Moved to Section 711 and revised [adds PM-2.5]
Table 2Ambient Air--Methods of Contaminant Measurements1989-05-08 (LAc49) and 1989-08-14 (LAc50)2011-08-03LAd34 - Moved to Section 711 and revised [adds PM-2.5]

Chapter 9. General Regulations on Control of Emissions and Emission Standards

State citationTitle/subjectEPA Effective Start DateEPA Effective End DateComments
Section 901Purpose1989-05-08 (LAc49)2011-08-03?? 
Section 903Scope1989-05-08 (LAc49)2011-08-03?? 
Section 905Control Facilities to be Installed when Feasible1989-05-08 (LAc49)2011-08-03?? 
Section 907Emission Resulting in Undesirable Levels Not Allowed (From Refuse Disposal)1989-05-08 (LAc49)2011-08-03(LAd34 - Removed from SIP)
Section 909Responsible Person to have Test Made1989-05-08 (LAc49)2011-08-03?? 
Section 911Department May Make Tests1989-05-08 (LAc49)2011-08-03?? 
Section 913New Sources to Provide Sampling Ports1989-05-08 (LAc49)2011-08-03?? 
Section 915Emission Monitoring Requirements: Applicability, Special Considerations, Exemptions, and Circumvention1989-05-08 (LAc49)2011-08-03?? 
Section 917Variances1989-05-08 (LAc49)2011-08-03?? 
Section 918 (v1989)Recordkeeping and Annual Reporting1989-05-08 (LAc49)2011-08-03 (LAd34 - Revised) 
Section 918 (v2011)Recordkeeping and Annual Reporting; SIP effective2011-08-04 (LAd34)2016-02-28 
Section 919 (v1995)Emission Inventory1995-02-06 (LAc65)2011-08-03 (LAd34 - Revised) 
Section 919 (v2011)Emission Inventory2011-08-04 (LAd34) and 2016-02-29 (LAd47)2017-09-27 
Section 921Stack Heights1989-05-08 (LAc49)2011-08-03?? 
Section 923Maintenance of Pay1989-05-08 (LAc49)2011-08-03?? 
Section 925Mass Emission Rate Control Plan1989-05-08 (LAc49)2011-08-03?? 
Section 927Notification Required (Emergency Occurrences)1989-05-08 (LAc49)2011-08-03?? 
Section 929Violation of Emission Regulation Cannot be Authorized1989-05-08 (LAc49)2011-08-03?? 

Chapter 11. Control of Emissions of Smoke

State citationTitle/subjectEPA Effective Start DateEPA Effective End DateComments
Section 1101Control of Air Pollution from Smoke: Purpose & Control of Smoke1989-05-08 (LAc49)2011-08-03 (LAd34 - Revised) 
Section 1103Impairment of Visibility on Public Roads Prohibited1989-05-08 (LAc49)2011-08-03 (LAd34 - Revised) 
Section 1105 (v1989)Smoke from Flaring Shall be no Darker than No. 1 Ringelmann1989-05-08 (LAc49)2011-08-03 (LAd34 - Revised) 
Section 1105 (v2011)Smoke from Flaring Shall Not Exceed 20 Percent Opacity2011-08-04 (LAd34)2016-02-28 
Section 1107 (v1989)Exemptions1989-05-08 (LAc49)2011-08-03 (LAd34 - Revised) 
Section 1107 (v2011)Exemptions2011-08-04 (LAd34)2016-02-28 
Section 11091109. Control of Air Pollution from Outdoor Burning1989-05-08 (LAc49)2011-08-03 (LAd34 - Revised) 
Section 11111111. Exclusion: Variance, Unpopulated Areas and Water Vapor1989-05-08 (LAc49)2011-08-03 (LAd34 - Revised) 

Chapter 13. Emission Standards for Particulate Matter

State citationTitle/SubjectEPA Effective Start DateEPA Effective End DateExplanation
Sections 1301 - 1309Subchapter A, 1301 to 1309--General1989-05-08 (LAc49) and 1989-08-14 (LAc50)2011-08-03 (LAd34) 
Section 1311Subchapter B, 1311--Fluid Catalytic Cracking Units1989-05-08 (LAc49) and 1989-08-14 (LAc50)2011-08-03 (LAd34 - Revised) 
Sections 1313 - 1317Subchapter C, 1313 to 1317--Fuel Burning Equipment1989-05-08 (LAc49) and 1989-08-14 (LAc50)? 
Section 1319Subchapter D, 1319--Refuse Incinerators1989-05-08 (LAc49) and 1989-08-14 (LAc50)2011-08-03 (LAd34 - Revised) 
Section 1321Subchapter E, 1321--Leadened Particulate Matter1989-05-08 (LAc49)? 
Table 3Table 3 - Allowable Rate of Emissions Based on Process Weight Rate1989-05-08 (LAc49)? 

Chapter 14. Conformity

State citationTitle/SubjectEPA Effective Start DateEPA Effective End DateExplanation
Sections 1401-1415Subchapter A, 1401 to 1415--Determining Conformity of General Federal Actions to State or Federal Implementation Plans1996-11-12 (LAc67) and 1998-05-08 (LAc75)? 
Sections 1431-1434Subchapter B, 1431 to 1434--Conformity to State or Federal Implementation Plans of Transportation Plans, Programs, and Projects Developed, Funded, or Approved Under Title 23 U.S.C. or the Federal Transit Laws2000-02-28 (LAd06) and 2006-12-28 (LAd21)? 

Chapter 15. Emission Standards for Sulfur Dioxide

State citationTitle/SubjectEPA Effective Start DateEPA Effective End DateExplanation
Section 1501 (v1993.1)Degradation of Existing Emission Quality Restricted1993-09-13 (LAc59)2011-08-03 
Section 1501 (v1993.2)Emission Limitations1993-09-13 (LAc59)2011-08-03 
Section 1503.D.2Table 4 - Emissions--Methods of Contaminant Measurement1993-09-13 (LAc59)? 
Section 1505Variance1993-09-13 (LAc59)? 
Section 1507Exceptions, Start-Up Provisions, On-line Operating Adjustments, and Bubble Concept1993-09-13 (LAc59)? 
Section 1509Reduced Sulfur Compounds (New and Existing Sources)1993-09-13 (LAc59)? 
Section 1511Continuous Emissions Monitoring1993-09-13 (LAc59)2011-08-03 (LAd34 - Revised) 
Section 1513Recordkeeping and Reporting1993-09-13 (LAc59)? 

Chapter 17. Control of Emissions of Carbon Monoxide (New Sources)

State citationTitle/SubjectEPA Effective Start DateEPA Effective End DateExplanation
Section 1701Subchapter A, 1701. General; Degradation of Existing Emission Quality Restricted1989-05-08 (LAc49)? 
Section 1703Subchapter B, 1703--Ferrous Metal Emissions; §1703 Ferrous Metal Emissions1989-05-08 (LAc49)? 
Section 1705Subchapter C, 1705--Petroleum Refinery Emissions; §1705 Petroleum Refinery Emissions1989-05-08 (LAc49)? 

Chapter 19. Mobile Sources

State citationTitle/SubjectEPA Effective Start DateEPA Effective End DateExplanation
Sections 1951-1973Subchapter B, 1951 to 1973--Clean Fuel Fleet1995-12-22 (LAc66)2011-08-04 (LAd34)(LAd34 - Removed from SIP)

Chapter 21. Control of Emissions of Organic Compounds

State citationTitle/subjectEPA Effective Start DateEPA Effective End DateComments
Sections 2101 - 2122Ch 21 Subchapter A 2101 to 2122--General52.970(c)(60) effective 06/06/94

52.970(c)(71) effective 12/23/96

52.970(c)(64) effective 08/26/96
2011-08-03? 
Section 2103Louisiana SIP: LAC 33:III Ch. 21 Section 2103 - Storage of Volatile Organic Compounds, SIP effective August 4, 2011 (LAd34) and February 29, 2016 (LAd47) to September 27, 2017   
Section 2107Volatile Organic Compounds - Loading2011-08-04 (LAd34)2017-09-27 
Section 2108Marine Vapor Recovery2011-08-04 (LAd34) and 2016-02-29 (LAd47)2017-09-27 
Section 2121Fugitive Emission Control2011-08-04 (LAd34) and 2016-02-29 (LAd47)2017-09-27 
Section 2123Subchapter B, 2123--Organic Solvents1996-08-26 (LAc64)2011-08-03 (LAd34 - Revised) 
Section 2125 (v1996)Subchapter C, 2125--Vapor Degreasers1996-08-26 (LAc64)2011-08-03 (LAd34 - Revised) 
Section 2125 (v2011)Solvent Degreasers: §2125 Vapor Degreasers2011-08-04 (LAd34)2017-09-27 
Section 2127Subchapter D, 2127. Cutback Paving Asphalt1994-06-06 (LAc60)?? 
Section 2129Subchapter E, 2129--Perchloroethylene Dry Cleaning System1994-06-06 (LAc60) to2011-08-03 (LAd34 - Revised)2011-08-04 (LAd34 - Removed from SIP)
Section 2131Filling of Gasoline Storage Vessels2011-08-04 (LAd34)2017-09-27 
Section 2132Stage II Vapor Recovery Systems for Control of Vehicle Refueling Emissions at Gasoline Dispensing Facilities2011-08-04 (LAd34) and 2016-02-29 (LAd47)2017-09-27 
Sections 2131-2137Subchapter F, 2131 to 2137--Gasoline Handling1994-06-06 (LAc60) and 1996-08-26 (LAc64)2011-08-03 (LAd34 - Revised) 
Sections 2139-2141Subchapter G, 2139 to 2141--Petroleum Refinery Operations1994-06-06 (LAc60)2011-08-03 (LAc34 - Revised) 
Section 2143 (v1994)Subchapter H, 2143--Graphic Arts1994-06-06 (LAc60) and 1996-08-26 (LAc64)2011-08-03 (LAd34 - Revised) 
Section 2143 (v2011)Graphic Arts (Printing) by Rotogravure and Flexographic Processes. Control Requirements2011-08-04 (LAd34)2012-01-02 
Section 2145 (v1994)Subchapter I, 2145--Pharmaceutical Manufacturing Facilities1994-06-06 (LAc60)2011-08-03 (LAd34 - Revised) 
Section 2145 (v2011)Pharmaceutical Manufacturing Facilities2011-08-04 (LAd34)2017-09-27 
Section 2147 (v1998)Limiting Volatile Organic Compound (VOC) Emissions from Reactor Processes and Distillation Operations in Synthetic Organic Chemical manufacturing Industry (SOCMI)1998-02-02 (LAc74)2011-08-03 (LAd34 - Revised) 
Section 2147 (v2011)Limiting Volatile Organic Compound (VOC) Emissions from Reactor Processes and Distillation Operations in Synthetic Organic Chemical manufacturing Industry (SOCMI)2011-08-04 (LAd34)2017-09-27 
Section 2149Subchapter K, 2149--Limiting Volatile Organic Compound (VOC) Emissions from Batch Processing; SIP effective to1998-11-09 (LAc77)2011-08-03 (LAc34 - Revised) 
Section 2151Subchapter L, 2151--Limiting Volatile Organic Compound Emissions from Cleanup Solvent Processing1998-02-02 (LAc74)2011-08-03 (LAc34 - Revised) 
Section 2153Subchapter M, 2153--Limiting Volatile Organic Compound Emissions From Industrial Wastewater2002-08-19 (LAd09)2011-08-03 (LAc34 - Revised) 
Table 8[List of Synthetic Organic Chemicals]1989-05-08 (LAc49)2011-08-03Ref 52.999(c) (49) and (60). Table approved at (c)(49) included CAS numbers. Table approved at (c)(60) did not include CAS numbers
Section
2199
Chapter 21 Appendix A, Table 8, Synthetic Organic Chemical Manufacturing Industry (SOCMI) Chemicals.2011-08-04
LAd34
Present 

Chapter 22. Control of Emissions of Nitrogen Oxides (NOx)

State citationTitle/subjectEPA Effective Start DateEPA Effective End DateComments
Section 2201 (v2002)Affected Facilities in the Baton Rouge Nonattainment Area and the Region of Influence2002-09-27 (LAd13)2011-08-03 (LAd34 - Revised) 
Section 2201 (v2011)Affected Facilities in the Baton Rouge Nonattainment Area and the Region of Influence2011-08-04 (LAd34)2011-12-29 
Section 2201 (v2011-2016)Affected Facilities in the Baton Rouge Nonattainment Area and the Region of Influence2011-12-30 (LAd38) and 2016-02-29 (LAd47)2017-09-27 

Chapter 23. Control of Emissions for Specific Industries

State citationTitle/SubjectEPA Effective Start DateEPA Effective End DateExplanation
Section 2301Subchapter A, 2301 Control of Emissions from the Chemical Woodpulping Industry1989-05-08 (LAc49)2011-08-03 (LAad34 - Revised) 
Section 2303Subchapter B, 2303--Aluminum Plants, §2303 Standards for Horizontal Stud Soderberg Primary Aluminum Plants and Prebake Primary Aluminum Plants1989-05-08 (LAc49)2011-08-03 (LAad34 - Revised) 
Section 2305Subchapter C, §2305--Phosphate Fertilizer Plants, §2305 Fluoride Emission Standards for Phosphate Fertilizer Plants1989-05-08 (LAc49)? 
Section 2307Subchapter D, §2307--Emission Standards for the Nitric Acid Industry1989-05-08 (LAc49)2011-08-03 (LAd34 - Revised) 

Chapter 25 - Subchapter B - Biomedical Waste Incinerators

State citationTitle/SubjectEPA Effective Start DateEPA Effective End DateExplanation
Section 2511Standards of Performance for Biomedical Waste Incinerators. RegistrationAugust 4, 2011 (LAd34)? 
Section 2511.BDefinitions?? 
Section 2511.CRegistrationFebruary 29, 2016 (LAd47)? 
Section 2511.E.5Restrictions on Emissions?? 
Section 2511.E.6.a.-dRestrictions on Emissions?? 

Chapter 25 - Subchapter C - Refuse Incinerators

State CitationTitle/SubjectEPA Effective Start DateEPA Effective End DateExplanation
Section 2521Refuse Incinerators?? 
Section 2521.E. and 2521.F.9.a.-dRefuse Incinerators?? 
Section 2521.F.10Refuse Incinerators?? 

Chapter 25 - Subchapter D - Crematories

State citationTitle/SubjectEPA Effective Start DateEPA Effective End DateExplanation
Section 2531Standards of Performance for CrematoriesFebruary 29, 201609-27-2017 

Chapter 56. Prevention of Air Pollution Emergency Episodes

State citationTitle/SubjectEPA Effective Start DateEPA Effective End DateExplanation
Sections 5601-5611
Tables 5,6,7
Prevention of Air Pollution Emergency Episodes1989-05-08 (LAc49)? 

Chapter 60. Test Methods - NSPS Division's Source Test Manual

State citationTitle/SubjectEPA Effective Start DateEPA Effective End DateExplanation
Sections 6001-608940 CFR 60, Appendix A NSPS Methods 1 to 411989-05-08 (LAc49)2011-08-04 (LAd34 - Removed from SIP) 

Chapter 61. Divisions Source Test Manual

State citationTitle/SubjectEPA Effective Start DateEPA Effective End DateExplanation
Sections 6121-6131Subchapter A, §6121 to §6131--Method 43 - Capture Efficiency Test Procedures1994-06-06 (LAc60)2011-08-03 (LAd34 - Moved to Chap 21 Subchapter N §§ 2155-2160 and revised) 

Chapter 63. Test Methods - LESHAP Division's Source Test Manual

State citationTitle/SubjectEPA Effective Start DateEPA Effective End DateExplanation
Sections 6301-640140 CFR Part 61, Appendix B Test Methods1989-05-08 (LAc49)? 

Chapter 65. Rules and Regulations for the Fee System of the Air Quality Control Programs

SIP effective May 8, 1989 (LAc49) to June 19, 2016 (LAd48) -- See LAC 33:III Chapter 2 above

State citationTitle/SubjectEPA Effective Start DateEPA Effective End DateExplanation
Chapter 65, Sections 6501-6523, LAc49, LAc61, LAc66LAC 33:III Ch 65 Rules and Regulations for the Fee System of the Air Quality Control Programs, SIP effective May 8, 1989 (LAc49) to June 19, 2016 (LAd48)May 8, 1989 (LAc49)June 19, 2016 (LAd48)Replaced by LAC 33:III Chapter 2. Rules and Regulations for the Fee System of the Air Quality Control Program, approved by EPA April 21, 2016 (81 FR 23425) effective June 20, 2016 (LAd48), Regulations.gov docket EPA-R06-OAR-2016-0132 [LA051] -- See Chapter 2 in Current Louisiana SIP-Approved Regulations

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