| 40:2.0.1.1.1 | PART 50
| PART 50 - NATIONAL PRIMARY AND SECONDARY AMBIENT AIR QUALITY STANDARDS | |
| 40:2.0.1.1.1.0.1.1 | SECTION 50.1
| 50.1 Definitions. | |
| 40:2.0.1.1.1.0.1.2 | SECTION 50.2
| 50.2 Scope. | |
| 40:2.0.1.1.1.0.1.3 | SECTION 50.3
| 50.3 Reference conditions. | |
| 40:2.0.1.1.1.0.1.4 | SECTION 50.4
| 50.4 National primary ambient air quality standards for sulfur oxides (sulfur dioxide). | |
| 40:2.0.1.1.1.0.1.5 | SECTION 50.5
| 50.5 National secondary ambient air quality standard for sulfur oxides (sulfur dioxide). | |
| 40:2.0.1.1.1.0.1.6 | SECTION 50.6
| 50.6 National primary and secondary ambient air quality standards for PM10. | |
| 40:2.0.1.1.1.0.1.7 | SECTION 50.7
| 50.7 National primary and secondary ambient air quality standards for PM2.5. | |
| 40:2.0.1.1.1.0.1.8 | SECTION 50.8
| 50.8 National primary ambient air quality standards for carbon monoxide. | |
| 40:2.0.1.1.1.0.1.9 | SECTION 50.9
| 50.9 National 1-hour primary and secondary ambient air quality standards for ozone. | |
| 40:2.0.1.1.1.0.1.10 | SECTION 50.10
| 50.10 National 8-hour primary and secondary ambient air quality standards for ozone. | |
| 40:2.0.1.1.1.0.1.11 | SECTION 50.11
| 50.11 National primary and secondary ambient air quality standards for oxides of nitrogen (with nitrogen dioxide as the indicator). | |
| 40:2.0.1.1.1.0.1.12 | SECTION 50.12
| 50.12 National primary and secondary ambient air quality standards for lead. | |
| 40:2.0.1.1.1.0.1.13 | SECTION 50.13
| 50.13 National primary and secondary ambient air quality standards for PM2.5. | |
| 40:2.0.1.1.1.0.1.14 | SECTION 50.14
| 50.14 Treatment of air quality monitoring data influenced by exceptional events. | |
| 40:2.0.1.1.1.0.1.15 | SECTION 50.15
| 50.15 National primary and secondary ambient air quality standards for ozone. | |
| 40:2.0.1.1.1.0.1.16 | SECTION 50.16
| 50.16 National primary and secondary ambient air quality standards for lead. | |
| 40:2.0.1.1.1.0.1.17 | SECTION 50.17
| 50.17 National primary ambient air quality standards for sulfur oxides (sulfur dioxide). | |
| 40:2.0.1.1.1.0.1.18 | SECTION 50.18
| 50.18 National primary ambient air quality standards for PM2.5. | |
| 40:2.0.1.1.1.0.1.19 | SECTION 50.19
| 50.19 National primary and secondary ambient air quality standards for ozone. | |
| 40:2.0.1.1.1.0.1.20.1 | APPENDIX Appendix A
| Appendix A-1 to Part 50 - Reference Measurement Principle and Calibration Procedure for the Measurement of Sulfur Dioxide in the Atmosphere (Ultraviolet Fluorescence Method) | |
| 40:2.0.1.1.1.0.1.20.2 | APPENDIX Appendix A
| Appendix A-2 to Part 50 - Reference Method for the Determination of Sulfur Dioxide in the Atmosphere (Pararosaniline Method) | |
| 40:2.0.1.1.1.0.1.20.3 | APPENDIX Appendix B
| Appendix B to Part 50 - Reference Method for the Determination of Suspended Particulate Matter in the Atmosphere (High-Volume Method) | |
| 40:2.0.1.1.1.0.1.20.4 | APPENDIX Appendix C
| Appendix C to Part 50 - Measurement Principle and Calibration Procedure for the Measurement of Carbon Monoxide in the Atmosphere (Non-Dispersive Infrared Photometry) | |
| 40:2.0.1.1.1.0.1.20.5 | APPENDIX Appendix D
| Appendix D to Part 50 - Reference Measurement Principle and Calibration Procedure for the Measurement of Ozone in the Atmosphere (Chemiluminescence Method) | |
| 40:2.0.1.1.1.0.1.20.6 | APPENDIX Appendix E
| Appendix E to Part 50 [Reserved] | |
| 40:2.0.1.1.1.0.1.20.7 | APPENDIX Appendix F
| Appendix F to Part 50 - Measurement Principle and Calibration Procedure for the Measurement of Nitrogen Dioxide in the Atmosphere (Gas Phase Chemiluminescence) | |
| 40:2.0.1.1.1.0.1.20.8 | APPENDIX Appendix G
| Appendix G to Part 50 - Reference Method for the Determination of Lead in Total Suspended Particulate Matter | |
| 40:2.0.1.1.1.0.1.20.9 | APPENDIX Appendix H
| Appendix H to Part 50 - Interpretation of the 1-Hour Primary and Secondary National Ambient Air Quality Standards for Ozone | |
| 40:2.0.1.1.1.0.1.20.10 | APPENDIX Appendix I
| Appendix I to Part 50 - Interpretation of the 8-Hour Primary and Secondary National Ambient Air Quality Standards for Ozone | |
| 40:2.0.1.1.1.0.1.20.11 | APPENDIX Appendix J
| Appendix J to Part 50 - Reference Method for the Determination of Particulate Matter as PM10 in the Atmosphere | |
| 40:2.0.1.1.1.0.1.20.12 | APPENDIX Appendix K
| Appendix K to Part 50 - Interpretation of the National Ambient Air Quality Standards for Particulate Matter | |
| 40:2.0.1.1.1.0.1.20.13 | APPENDIX Appendix L
| Appendix L to Part 50 - Reference Method for the Determination of Fine Particulate Matter as PM2.5 in the Atmosphere | |
| 40:2.0.1.1.1.0.1.20.14 | APPENDIX Appendix M
| Appendix M to Part 50 [Reserved] | |
| 40:2.0.1.1.1.0.1.20.15 | APPENDIX Appendix N
| Appendix N to Part 50 - Interpretation of the National Ambient Air Quality Standards for PM2.5 | |
| 40:2.0.1.1.1.0.1.20.16 | APPENDIX Appendix O
| Appendix O to Part 50 - Reference Method for the Determination of Coarse Particulate Matter as PM10-2.5 in the Atmosphere | |
| 40:2.0.1.1.1.0.1.20.17 | APPENDIX Appendix P
| Appendix P to Part 50 - Interpretation of the Primary and Secondary National Ambient Air Quality Standards for Ozone | |
| 40:2.0.1.1.1.0.1.20.18 | APPENDIX Appendix Q
| Appendix Q to Part 50 - Reference Method for the Determination of Lead in Particulate Matter as PM10 Collected From Ambient Air | |
| 40:2.0.1.1.1.0.1.20.19 | APPENDIX Appendix R
| Appendix R to Part 50 - Interpretation of the National Ambient Air Quality Standards for Lead | |
| 40:2.0.1.1.1.0.1.20.20 | APPENDIX Appendix S
| Appendix S to Part 50 - Interpretation of the Primary National Ambient Air Quality Standards for Oxides of Nitrogen (Nitrogen Dioxide) | |
| 40:2.0.1.1.1.0.1.20.21 | APPENDIX Appendix T
| Appendix T to Part 50 - Interpretation of the Primary National Ambient Air Quality Standards for Oxides of Sulfur (Sulfur Dioxide) | |
| 40:2.0.1.1.1.0.1.20.22 | APPENDIX Appendix U
| Appendix U to Part 50 - Interpretation of the Primary and Secondary National Ambient Air Quality Standards for Ozone | |
| 40:2.0.1.1.2 | PART 51
| PART 51 - REQUIREMENTS FOR PREPARATION, ADOPTION, AND SUBMITTAL OF IMPLEMENTATION PLANS | |
| 40:2.0.1.1.2.1 | SUBPART A
| Subpart A - Air Emissions Reporting Requirements | |
| 40:2.0.1.1.2.1.6 | SUBJGRP 6
| General Information for Inventory Preparers | |
| 40:2.0.1.1.2.1.6.1 | SECTION 51.1
| 51.1 Who is responsible for actions described in this subpart | |
| 40:2.0.1.1.2.1.6.2 | SECTION 51.5
| 51.5 What tools are available to help prepare and report emissions data | |
| 40:2.0.1.1.2.1.6.3 | SECTION 51.10
| 51.10 [Reserved] | |
| 40:2.0.1.1.2.1.7 | SUBJGRP 7
| Specific Reporting Requirements | |
| 40:2.0.1.1.2.1.7.4 | SECTION 51.15
| 51.15 What data does my state need to report to EPA | |
| 40:2.0.1.1.2.1.7.5 | SECTION 51.20
| 51.20 What are the emission thresholds that separate point and nonpoint sources | |
| 40:2.0.1.1.2.1.7.6 | SECTION 51.25
| 51.25 What geographic area must my state's inventory cover | |
| 40:2.0.1.1.2.1.7.7 | SECTION 51.30
| 51.30 When does my state report which emissions data to EPA | |
| 40:2.0.1.1.2.1.7.8 | SECTION 51.35
| 51.35 How can my state equalize the emission inventory effort from year to year | |
| 40:2.0.1.1.2.1.7.9 | SECTION 51.40
| 51.40 In what form and format should my state report the data to EPA | |
| 40:2.0.1.1.2.1.7.10 | SECTION 51.45
| 51.45 Where should my state report the data | |
| 40:2.0.1.1.2.1.7.11 | SECTION 51.50
| 51.50 What definitions apply to this subpart | |
| 40:2.0.1.1.2.1.8.12.23 | APPENDIX Appendix A
| Appendix A to Subpart A of Part 51 - Tables | |
| 40:2.0.1.1.2.2 | SUBPART B
| Subparts B-E [Reserved] | |
| 40:2.0.1.1.2.3 | SUBPART F
| Subpart F - Procedural Requirements | |
| 40:2.0.1.1.2.3.8.1 | SECTION 51.100
| 51.100 Definitions. | |
| 40:2.0.1.1.2.3.8.2 | SECTION 51.101
| 51.101 Stipulations. | |
| 40:2.0.1.1.2.3.8.3 | SECTION 51.102
| 51.102 Public hearings. | |
| 40:2.0.1.1.2.3.8.4 | SECTION 51.103
| 51.103 Submission of plans, preliminary review of plans. | |
| 40:2.0.1.1.2.3.8.5 | SECTION 51.104
| 51.104 Revisions. | |
| 40:2.0.1.1.2.3.8.6 | SECTION 51.105
| 51.105 Approval of plans. | |
| 40:2.0.1.1.2.4 | SUBPART G
| Subpart G - Control Strategy | |
| 40:2.0.1.1.2.4.8.1 | SECTION 51.110
| 51.110 Attainment and maintenance of national standards. | |
| 40:2.0.1.1.2.4.8.2 | SECTION 51.111
| 51.111 Description of control measures. | |
| 40:2.0.1.1.2.4.8.3 | SECTION 51.112
| 51.112 Demonstration of adequacy. | |
| 40:2.0.1.1.2.4.8.4 | SECTION 51.113
| 51.113 [Reserved] | |
| 40:2.0.1.1.2.4.8.5 | SECTION 51.114
| 51.114 Emissions data and projections. | |
| 40:2.0.1.1.2.4.8.6 | SECTION 51.115
| 51.115 Air quality data and projections. | |
| 40:2.0.1.1.2.4.8.7 | SECTION 51.116
| 51.116 Data availability. | |
| 40:2.0.1.1.2.4.8.8 | SECTION 51.117
| 51.117 Additional provisions for lead. | |
| 40:2.0.1.1.2.4.8.9 | SECTION 51.118
| 51.118 Stack height provisions. | |
| 40:2.0.1.1.2.4.8.10 | SECTION 51.119
| 51.119 Intermittent control systems. | |
| 40:2.0.1.1.2.4.8.11 | SECTION 51.120
| 51.120 Requirements for State Implementation Plan revisions relating to new motor vehicles. | |
| 40:2.0.1.1.2.4.8.12 | SECTION 51.121
| 51.121 Findings and requirements for submission of State implementation plan revisions relating to emissions of nitrogen oxides. | |
| 40:2.0.1.1.2.4.8.13 | SECTION 51.122
| 51.122 Emissions reporting requirements for SIP revisions relating to budgets for NOX emissions. | |
| 40:2.0.1.1.2.4.8.14 | SECTION 51.123
| 51.123 Findings and requirements for submission of State implementation plan revisions relating to emissions of oxides of nitrogen pursuant to the Clean Air Interstate Rule. | |
| 40:2.0.1.1.2.4.8.15 | SECTION 51.124
| 51.124 Findings and requirements for submission of State implementation plan revisions relating to emissions of sulfur dioxide pursuant to the Clean Air Interstate Rule. | |
| 40:2.0.1.1.2.4.8.16 | SECTION 51.125
| 51.125 [Reserved] | |
| 40:2.0.1.1.2.4.8.17 | SECTION 51.126
| 51.126 Determination of widespread use of ORVR and waiver of CAA section 182(b)(3) Stage II gasoline vapor recovery requirements. | |
| 40:2.0.1.1.2.5 | SUBPART H
| Subpart H - Prevention of Air Pollution Emergency Episodes | |
| 40:2.0.1.1.2.5.8.1 | SECTION 51.150
| 51.150 Classification of regions for episode plans. | |
| 40:2.0.1.1.2.5.8.2 | SECTION 51.151
| 51.151 Significant harm levels. | |
| 40:2.0.1.1.2.5.8.3 | SECTION 51.152
| 51.152 Contingency plans. | |
| 40:2.0.1.1.2.5.8.4 | SECTION 51.153
| 51.153 Reevaluation of episode plans. | |
| 40:2.0.1.1.2.6 | SUBPART I
| Subpart I - Review of New Sources and Modifications | |
| 40:2.0.1.1.2.6.8.1 | SECTION 51.160
| 51.160 Legally enforceable procedures. | |
| 40:2.0.1.1.2.6.8.2 | SECTION 51.161
| 51.161 Public availability of information. | |
| 40:2.0.1.1.2.6.8.3 | SECTION 51.162
| 51.162 Identification of responsible agency. | |
| 40:2.0.1.1.2.6.8.4 | SECTION 51.163
| 51.163 Administrative procedures. | |
| 40:2.0.1.1.2.6.8.5 | SECTION 51.164
| 51.164 Stack height procedures. | |
| 40:2.0.1.1.2.6.8.6 | SECTION 51.165
| 51.165 Permit requirements. | |
| 40:2.0.1.1.2.6.8.7 | SECTION 51.166
| 51.166 Prevention of significant deterioration of air quality. | |
| 40:2.0.1.1.2.7 | SUBPART J
| Subpart J - Ambient Air Quality Surveillance | |
| 40:2.0.1.1.2.7.8.1 | SECTION 51.190
| 51.190 Ambient air quality monitoring requirements. | |
| 40:2.0.1.1.2.8 | SUBPART K
| Subpart K - Source Surveillance | |
| 40:2.0.1.1.2.8.8.1 | SECTION 51.210
| 51.210 General. | |
| 40:2.0.1.1.2.8.8.2 | SECTION 51.211
| 51.211 Emission reports and recordkeeping. | |
| 40:2.0.1.1.2.8.8.3 | SECTION 51.212
| 51.212 Testing, inspection, enforcement, and complaints. | |
| 40:2.0.1.1.2.8.8.4 | SECTION 51.213
| 51.213 Transportation control measures. | |
| 40:2.0.1.1.2.8.8.5 | SECTION 51.214
| 51.214 Continuous emission monitoring. | |
| 40:2.0.1.1.2.9 | SUBPART L
| Subpart L - Legal Authority | |
| 40:2.0.1.1.2.9.8.1 | SECTION 51.230
| 51.230 Requirements for all plans. | |
| 40:2.0.1.1.2.9.8.2 | SECTION 51.231
| 51.231 Identification of legal authority. | |
| 40:2.0.1.1.2.9.8.3 | SECTION 51.232
| 51.232 Assignment of legal authority to local agencies. | |
| 40:2.0.1.1.2.10 | SUBPART M
| Subpart M - Intergovernmental Consultation | |
| 40:2.0.1.1.2.10.8 | SUBJGRP 8
| Agency Designation | |
| 40:2.0.1.1.2.10.8.1 | SECTION 51.240
| 51.240 General plan requirements. | |
| 40:2.0.1.1.2.10.8.2 | SECTION 51.241
| 51.241 Nonattainment areas for carbon monoxide and ozone. | |
| 40:2.0.1.1.2.10.8.3 | SECTION 51.242
| 51.242 [Reserved] | |
| 40:2.0.1.1.2.11 | SUBPART N
| Subpart N - Compliance Schedules | |
| 40:2.0.1.1.2.11.9.1 | SECTION 51.260
| 51.260 Legally enforceable compliance schedules. | |
| 40:2.0.1.1.2.11.9.2 | SECTION 51.261
| 51.261 Final compliance schedules. | |
| 40:2.0.1.1.2.11.9.3 | SECTION 51.262
| 51.262 Extension beyond one year. | |
| 40:2.0.1.1.2.12 | SUBPART O
| Subpart O - Miscellaneous Plan Content Requirements | |
| 40:2.0.1.1.2.12.9.1 | SECTION 51.280
| 51.280 Resources. | |
| 40:2.0.1.1.2.12.9.2 | SECTION 51.281
| 51.281 Copies of rules and regulations. | |
| 40:2.0.1.1.2.12.9.3 | SECTION 51.285
| 51.285 Public notification. | |
| 40:2.0.1.1.2.12.9.4 | SECTION 51.286
| 51.286 Electronic reporting. | |
| 40:2.0.1.1.2.13 | SUBPART P
| Subpart P - Protection of Visibility | |
| 40:2.0.1.1.2.13.9.1 | SECTION 51.300
| 51.300 Purpose and applicability. | |
| 40:2.0.1.1.2.13.9.2 | SECTION 51.301
| 51.301 Definitions. | |
| 40:2.0.1.1.2.13.9.3 | SECTION 51.302
| 51.302 Reasonably attributable visibility impairment. | |
| 40:2.0.1.1.2.13.9.4 | SECTION 51.303
| 51.303 Exemptions from control. | |
| 40:2.0.1.1.2.13.9.5 | SECTION 51.304
| 51.304 Identification of integral vistas. | |
| 40:2.0.1.1.2.13.9.6 | SECTION 51.305
| 51.305 Monitoring for reasonably attributable visibility impairment. | |
| 40:2.0.1.1.2.13.9.7 | SECTION 51.306
| 51.306 [Reserved] | |
| 40:2.0.1.1.2.13.9.8 | SECTION 51.307
| 51.307 New source review. | |
| 40:2.0.1.1.2.13.9.9 | SECTION 51.308
| 51.308 Regional haze program requirements. | |
| 40:2.0.1.1.2.13.9.10 | SECTION 51.309
| 51.309 Requirements related to the Grand Canyon Visibility Transport Commission. | |
| 40:2.0.1.1.2.14 | SUBPART Q
| Subpart Q - Reports | |
| 40:2.0.1.1.2.14.9 | SUBJGRP 9
| Air Quality Data Reporting | |
| 40:2.0.1.1.2.14.9.1 | SECTION 51.320
| 51.320 Annual air quality data report. | |
| 40:2.0.1.1.2.14.10 | SUBJGRP 10
| Source Emissions and State Action Reporting | |
| 40:2.0.1.1.2.14.10.2 | SECTION 51.321
| 51.321 Annual source emissions and State action report. | |
| 40:2.0.1.1.2.14.10.3 | SECTION 51.322
| 51.322 Sources subject to emissions reporting. | |
| 40:2.0.1.1.2.14.10.4 | SECTION 51.323
| 51.323 Reportable emissions data and information. | |
| 40:2.0.1.1.2.14.10.5 | SECTION 51.324
| 51.324 Progress in plan enforcement. | |
| 40:2.0.1.1.2.14.10.6 | SECTION 51.326
| 51.326 Reportable revisions. | |
| 40:2.0.1.1.2.14.10.7 | SECTION 51.327
| 51.327 Enforcement orders and other State actions. | |
| 40:2.0.1.1.2.14.10.8 | SECTION 51.328
| 51.328 [Reserved] | |
| 40:2.0.1.1.2.15 | SUBPART R
| Subpart R - Extensions | |
| 40:2.0.1.1.2.15.11.1 | SECTION 51.341
| 51.341 Request for 18-month extension. | |
| 40:2.0.1.1.2.16 | SUBPART S
| Subpart S - Inspection/Maintenance Program Requirements | |
| 40:2.0.1.1.2.16.11.1 | SECTION 51.350
| 51.350 Applicability. | |
| 40:2.0.1.1.2.16.11.2 | SECTION 51.351
| 51.351 Enhanced I/M performance standard. | |
| 40:2.0.1.1.2.16.11.3 | SECTION 51.352
| 51.352 Basic I/M performance standard. | |
| 40:2.0.1.1.2.16.11.4 | SECTION 51.353
| 51.353 Network type and program evaluation. | |
| 40:2.0.1.1.2.16.11.5 | SECTION 51.354
| 51.354 Adequate tools and resources. | |
| 40:2.0.1.1.2.16.11.6 | SECTION 51.355
| 51.355 Test frequency and convenience. | |
| 40:2.0.1.1.2.16.11.7 | SECTION 51.356
| 51.356 Vehicle coverage. | |
| 40:2.0.1.1.2.16.11.8 | SECTION 51.357
| 51.357 Test procedures and standards. | |
| 40:2.0.1.1.2.16.11.9 | SECTION 51.358
| 51.358 Test equipment. | |
| 40:2.0.1.1.2.16.11.10 | SECTION 51.359
| 51.359 Quality control. | |
| 40:2.0.1.1.2.16.11.11 | SECTION 51.360
| 51.360 Waivers and compliance via diagnostic inspection. | |
| 40:2.0.1.1.2.16.11.12 | SECTION 51.361
| 51.361 Motorist compliance enforcement. | |
| 40:2.0.1.1.2.16.11.13 | SECTION 51.362
| 51.362 Motorist compliance enforcement program oversight. | |
| 40:2.0.1.1.2.16.11.14 | SECTION 51.363
| 51.363 Quality assurance. | |
| 40:2.0.1.1.2.16.11.15 | SECTION 51.364
| 51.364 Enforcement against contractors, stations and inspectors. | |
| 40:2.0.1.1.2.16.11.16 | SECTION 51.365
| 51.365 Data collection. | |
| 40:2.0.1.1.2.16.11.17 | SECTION 51.366
| 51.366 Data analysis and reporting. | |
| 40:2.0.1.1.2.16.11.18 | SECTION 51.367
| 51.367 Inspector training and licensing or certification. | |
| 40:2.0.1.1.2.16.11.19 | SECTION 51.368
| 51.368 Public information and consumer protection. | |
| 40:2.0.1.1.2.16.11.20 | SECTION 51.369
| 51.369 Improving repair effectiveness. | |
| 40:2.0.1.1.2.16.11.21 | SECTION 51.370
| 51.370 Compliance with recall notices. | |
| 40:2.0.1.1.2.16.11.22 | SECTION 51.371
| 51.371 On-road testing. | |
| 40:2.0.1.1.2.16.11.23 | SECTION 51.372
| 51.372 State Implementation Plan submissions. | |
| 40:2.0.1.1.2.16.11.24 | SECTION 51.373
| 51.373 Implementation deadlines. | |
| 40:2.0.1.1.2.16.11.25.24 | APPENDIX Appendix A
| Appendix A to Subpart S of Part 51 - Calibrations, Adjustments and Quality Control | |
| 40:2.0.1.1.2.16.11.25.25 | APPENDIX Appendix B
| Appendix B to Subpart S of Part 51 - Test Procedures | |
| 40:2.0.1.1.2.16.11.25.26 | APPENDIX Appendix C
| Appendix C to Subpart S of Part 51 - Steady-State Short Test Standards | |
| 40:2.0.1.1.2.16.11.25.27 | APPENDIX Appendix D
| Appendix D to Subpart S of Part 51 - Steady-State Short Test Equipment | |
| 40:2.0.1.1.2.16.11.25.28 | APPENDIX Appendix E
| Appendix E to Subpart S of Part 51 - Transient Test Driving Cycle | |
| 40:2.0.1.1.2.17 | SUBPART T
| Subpart T - 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 Laws | |
| 40:2.0.1.1.2.17.11.1 | SECTION 51.390
| 51.390 Implementation plan revision. | |
| 40:2.0.1.1.2.18 | SUBPART U
| Subpart U - Economic Incentive Programs | |
| 40:2.0.1.1.2.18.11.1 | SECTION 51.490
| 51.490 Applicability. | |
| 40:2.0.1.1.2.18.11.2 | SECTION 51.491
| 51.491 Definitions. | |
| 40:2.0.1.1.2.18.11.3 | SECTION 51.492
| 51.492 State program election and submittal. | |
| 40:2.0.1.1.2.18.11.4 | SECTION 51.493
| 51.493 State program requirements. | |
| 40:2.0.1.1.2.18.11.5 | SECTION 51.494
| 51.494 Use of program revenues. | |
| 40:2.0.1.1.2.19 | SUBPART W
| Subpart W - Determining Conformity of General Federal Actions to State or Federal Implementation Plans | |
| 40:2.0.1.1.2.19.11.1 | SECTION 51.850
| 51.850 [Reserved] | |
| 40:2.0.1.1.2.19.11.2 | SECTION 51.851
| 51.851 State implementation plan (SIP) or Tribal implementation plan (TIP) revision. | |
| 40:2.0.1.1.2.19.11.3 | SECTION 51.852-51.860
| 51.852-51.860 [Reserved] | |
| 40:2.0.1.1.2.20 | SUBPART X
| Subpart X - Provisions for Implementation of 8-hour Ozone National Ambient Air Quality Standard | |
| 40:2.0.1.1.2.20.11.1 | SECTION 51.900
| 51.900 Definitions. | |
| 40:2.0.1.1.2.20.11.2 | SECTION 51.901
| 51.901 Applicability of part 51. | |
| 40:2.0.1.1.2.20.11.3 | SECTION 51.902
| 51.902 Which classification and nonattainment area planning provisions of the CAA shall apply to areas designated nonattainment for the 1997 8-hour NAAQS | |
| 40:2.0.1.1.2.20.11.4 | SECTION 51.903
| 51.903 How do the classification and attainment date provisions in section 181 of subpart 2 of the CAA apply to areas subject to § 51.902(a) | |
| 40:2.0.1.1.2.20.11.5 | SECTION 51.904
| 51.904 How do the classification and attainment date provisions in section 172(a) of subpart 1 of the CAA apply to areas subject to § 51.902(b) | |
| 40:2.0.1.1.2.20.11.6 | SECTION 51.905
| 51.905 How do areas transition from the 1-hour NAAQS to the 1997 8-hour NAAQS and what are the anti-backsliding provisions | |
| 40:2.0.1.1.2.20.11.7 | SECTION 51.906
| 51.906 Redesignation to nonattainment following initial designations for the 8-hour NAAQS. | |
| 40:2.0.1.1.2.20.11.8 | SECTION 51.907
| 51.907 For an area that fails to attain the 8-hour NAAQS by its attainment date, how does EPA interpret sections 172(a)(2)(C)(ii) and 181(a)(5)(B) of the CAA | |
| 40:2.0.1.1.2.20.11.9 | SECTION 51.908
| 51.908 What modeling and attainment demonstration requirements apply for purposes of the 8-hour ozone NAAQS | |
| 40:2.0.1.1.2.20.11.10 | SECTION 51.909
| 51.909 [Reserved] | |
| 40:2.0.1.1.2.20.11.11 | SECTION 51.910
| 51.910 What requirements for reasonable further progress (RFP) under sections 172(c)(2) and 182 apply for areas designated nonattainment for the 8-hour ozone NAAQS | |
| 40:2.0.1.1.2.20.11.12 | SECTION 51.911
| 51.911 [Reserved] | |
| 40:2.0.1.1.2.20.11.13 | SECTION 51.912
| 51.912 What requirements apply for reasonably available control technology (RACT) and reasonably available control measures (RACM) under the 8-hour NAAQS | |
| 40:2.0.1.1.2.20.11.14 | SECTION 51.913
| 51.913 How do the section 182(f) NOX exemption provisions apply for the 8-hour NAAQS | |
| 40:2.0.1.1.2.20.11.15 | SECTION 51.914
| 51.914 What new source review requirements apply for 8-hour ozone nonattainment areas | |
| 40:2.0.1.1.2.20.11.16 | SECTION 51.915
| 51.915 What emissions inventory requirements apply under the 8-hour NAAQS | |
| 40:2.0.1.1.2.20.11.17 | SECTION 51.916
| 51.916 What are the requirements for an Ozone Transport Region under the 8-hour NAAQS | |
| 40:2.0.1.1.2.20.11.18 | SECTION 51.917
| 51.917 What is the effective date of designation for the Las Vegas, NV, 8-hour ozone nonattainment area | |
| 40:2.0.1.1.2.20.11.19 | SECTION 51.918
| 51.918 Can any SIP planning requirements be suspended in 8-hour ozone nonattainment areas that have air quality data that meets the NAAQS | |
| 40:2.0.1.1.2.20.11.20 | SECTION 51.919
| 51.919 Applicability. | |
| 40:2.0.1.1.2.21 | SUBPART Y
| Subpart Y - Mitigation Requirements | |
| 40:2.0.1.1.2.21.11.1 | SECTION 51.930
| 51.930 Mitigation of Exceptional Events. | |
| 40:2.0.1.1.2.22 | SUBPART Z
| Subpart Z - Provisions for Implementation of PM2.5 National Ambient Air Quality Standards | |
| 40:2.0.1.1.2.22.11.1 | SECTION 51.1000
| 51.1000 Definitions. | |
| 40:2.0.1.1.2.22.11.2 | SECTION 51.1001
| 51.1001 Applicability of part 51. | |
| 40:2.0.1.1.2.22.11.3 | SECTION 51.1002
| 51.1002 Classifications and reclassifications. | |
| 40:2.0.1.1.2.22.11.4 | SECTION 51.1003
| 51.1003 Attainment plan due dates and submission requirements. | |
| 40:2.0.1.1.2.22.11.5 | SECTION 51.1004
| 51.1004 Attainment dates. | |
| 40:2.0.1.1.2.22.11.6 | SECTION 51.1005
| 51.1005 Attainment date extensions. | |
| 40:2.0.1.1.2.22.11.7 | SECTION 51.1006
| 51.1006 Optional PM2.5 precursor demonstrations | |
| 40:2.0.1.1.2.22.11.8 | SECTION 51.1007
| 51.1007 [Reserved] | |
| 40:2.0.1.1.2.22.11.9 | SECTION 51.1008
| 51.1008 Emissions inventory requirements. | |
| 40:2.0.1.1.2.22.11.10 | SECTION 51.1009
| 51.1009 Moderate area attainment plan control strategy requirements. | |
| 40:2.0.1.1.2.22.11.11 | SECTION 51.1010
| 51.1010 Serious area attainment plan control strategy requirements. | |
| 40:2.0.1.1.2.22.11.12 | SECTION 51.1011
| 51.1011 Attainment demonstration and modeling requirements. | |
| 40:2.0.1.1.2.22.11.13 | SECTION 51.1012
| 51.1012 Reasonable further progress (RFP) requirements. | |
| 40:2.0.1.1.2.22.11.14 | SECTION 51.1013
| 51.1013 Quantitative milestone requirements. | |
| 40:2.0.1.1.2.22.11.15 | SECTION 51.1014
| 51.1014 Contingency measure requirements. | |
| 40:2.0.1.1.2.22.11.16 | SECTION 51.1015
| 51.1015 Clean data requirements. | |
| 40:2.0.1.1.2.22.11.17 | SECTION 51.1016
| 51.1016 Continued applicability of the FIP and SIP requirements pertaining to interstate transport under CAA section 110(a)(2)(D)(i) and (ii) after revocation of the 1997 primary annual PM2.5 NAAQS. | |
| 40:2.0.1.1.2.23 | SUBPART AA
| Subpart AA - Provisions for Implementation of the 2008 Ozone National Ambient Air Quality Standards | |
| 40:2.0.1.1.2.23.11.1 | SECTION 51.1100
| 51.1100 Definitions. | |
| 40:2.0.1.1.2.23.11.2 | SECTION 51.1101
| 51.1101 Applicability of part 51. | |
| 40:2.0.1.1.2.23.11.3 | SECTION 51.1102
| 51.1102 Classification and nonattainment area planning provisions. | |
| 40:2.0.1.1.2.23.11.4 | SECTION 51.1103
| 51.1103 Application of classification and attainment date provisions in CAA section 181 to areas subject to § 51.1102. | |
| 40:2.0.1.1.2.23.11.5 | SECTION 51.1104
| 51.1104 [Reserved] | |
| 40:2.0.1.1.2.23.11.6 | SECTION 51.1105
| 51.1105 Transition from the 1997 ozone NAAQS to the 2008 ozone NAAQS and anti-backsliding. | |
| 40:2.0.1.1.2.23.11.7 | SECTION 51.1106
| 51.1106 Redesignation to nonattainment following initial designations. | |
| 40:2.0.1.1.2.23.11.8 | SECTION 51.1107
| 51.1107 Determining eligibility for 1-year attainment date extensions for the 2008 ozone NAAQS under CAA section 181(a)(5). | |
| 40:2.0.1.1.2.23.11.9 | SECTION 51.1108
| 51.1108 Modeling and attainment demonstration requirements. | |
| 40:2.0.1.1.2.23.11.10 | SECTION 51.1109
| 51.1109 [Reserved] | |
| 40:2.0.1.1.2.23.11.11 | SECTION 51.1110
| 51.1110 Requirements for reasonable further progress (RFP). | |
| 40:2.0.1.1.2.23.11.12 | SECTION 51.1111
| 51.1111 [Reserved] | |
| 40:2.0.1.1.2.23.11.13 | SECTION 51.1112
| 51.1112 Requirements for reasonably available control technology (RACT) and reasonably available control measures (RACM). | |
| 40:2.0.1.1.2.23.11.14 | SECTION 51.1113
| 51.1113 Section 182(f) NOX exemption provisions. | |
| 40:2.0.1.1.2.23.11.15 | SECTION 51.1114
| 51.1114 New source review requirements. | |
| 40:2.0.1.1.2.23.11.16 | SECTION 51.1115
| 51.1115 Emissions inventory requirements. | |
| 40:2.0.1.1.2.23.11.17 | SECTION 51.1116
| 51.1116 Requirements for an Ozone Transport Region. | |
| 40:2.0.1.1.2.23.11.18 | SECTION 51.1117
| 51.1117 Fee programs for Severe and Extreme nonattainment areas that fail to attain. | |
| 40:2.0.1.1.2.23.11.19 | SECTION 51.1118
| 51.1118 Suspension of SIP planning requirements in nonattainment areas that have air quality data that meet an ozone NAAQS. | |
| 40:2.0.1.1.2.23.11.20 | SECTION 51.1119
| 51.1119 Applicability. | |
| 40:2.0.1.1.2.24 | SUBPART BB
| Subpart BB - Data Requirements for Characterizing Air Quality for the Primary SO2 NAAQS | |
| 40:2.0.1.1.2.24.11.1 | SECTION 51.1200
| 51.1200 Definitions. | |
| 40:2.0.1.1.2.24.11.2 | SECTION 51.1201
| 51.1201 Purpose. | |
| 40:2.0.1.1.2.24.11.3 | SECTION 51.1202
| 51.1202 Applicability. | |
| 40:2.0.1.1.2.24.11.4 | SECTION 51.1203
| 51.1203 Air agency requirements. | |
| 40:2.0.1.1.2.24.11.5 | SECTION 51.1204
| 51.1204 Enforceable emission limits providing for attainment. | |
| 40:2.0.1.1.2.24.11.6 | SECTION 51.1205
| 51.1205 Ongoing data requirements. | |
| 40:2.0.1.1.2.25 | SUBPART CC
| Subpart CC - Provisions for Implementation of the 2015 Ozone National Ambient Air Quality Standards | |
| 40:2.0.1.1.2.25.11.1 | SECTION 51.1300
| 51.1300 Definitions. | |
| 40:2.0.1.1.2.25.11.2 | SECTION 51.1301
| 51.1301 Applicability of this part. | |
| 40:2.0.1.1.2.25.11.3 | SECTION 51.1302
| 51.1302 Classification and nonattainment area planning provisions. | |
| 40:2.0.1.1.2.25.11.4 | SECTION 51.1303
| 51.1303 Application of classification and attainment date provisions in CAA section 181 to areas subject to § 51.1302. | |
| 40:2.0.1.1.2.25.11.5 | SECTION 51.1304-51.1305
| 51.1304-51.1305 [Reserved] | |
| 40:2.0.1.1.2.25.11.6 | SECTION 51.1306
| 51.1306 Redesignation to nonattainment following initial designations. | |
| 40:2.0.1.1.2.25.11.7 | SECTION 51.1307
| 51.1307 Determining eligibility for 1-year attainment date extensions for an 8-hour ozone NAAQS under CAA section 181(a)(5). | |
| 40:2.0.1.1.2.25.11.8 | SECTION 51.1308
| 51.1308 Modeling and attainment demonstration requirements. | |
| 40:2.0.1.1.2.25.11.9 | SECTION 51.1309
| 51.1309 [Reserved] | |
| 40:2.0.1.1.2.25.11.10 | SECTION 51.1310
| 51.1310 Requirements for reasonable further progress (RFP). | |
| 40:2.0.1.1.2.25.11.11 | SECTION 51.1311
| 51.1311 [Reserved] | |
| 40:2.0.1.1.2.25.11.12 | SECTION 51.1312
| 51.1312 Requirements for reasonably available control technology (RACT) and reasonably available control measures (RACM). | |
| 40:2.0.1.1.2.25.11.13 | SECTION 51.1313
| 51.1313 Section 182(f) NOX exemption provisions. | |
| 40:2.0.1.1.2.25.11.14 | SECTION 51.1314
| 51.1314 New source review requirements. | |
| 40:2.0.1.1.2.25.11.15 | SECTION 51.1315
| 51.1315 Emissions inventory requirements. | |
| 40:2.0.1.1.2.25.11.16 | SECTION 51.1316
| 51.1316 Requirements for an Ozone Transport Region. | |
| 40:2.0.1.1.2.25.11.17 | SECTION 51.1317
| 51.1317 Fee programs for Severe and Extreme nonattainment areas that fail to attain. | |
| 40:2.0.1.1.2.25.11.18 | SECTION 51.1318
| 51.1318 Suspension of SIP planning requirements in nonattainment areas that have air quality data that meet an ozone NAAQS. | |
| 40:2.0.1.1.2.25.11.19 | SECTION 51.1319
| 51.1319 [Reserved] | |
| 40:2.0.1.1.2.25.11.20.29 | APPENDIX
| Appendixes A-K to Part 51 [Reserved] | |
| 40:2.0.1.1.2.25.11.20.30 | APPENDIX Appendix L
| Appendix L to Part 51 - Example Regulations for Prevention of Air Pollution Emergency Episodes | |
| 40:2.0.1.1.2.25.11.20.31 | APPENDIX Appendix M
| Appendix M to Part 51 - Recommended Test Methods for State Implementation Plans | |
| 40:2.0.1.1.2.25.11.20.32 | APPENDIX
| Appendixes N-O to Part 51 [Reserved] | |
| 40:2.0.1.1.2.25.11.20.33 | APPENDIX Appendix P
| Appendix P to Part 51 - Minimum Emission Monitoring Requirements | |
| 40:2.0.1.1.2.25.11.20.34 | APPENDIX
| Appendixes Q-R to Part 51 [Reserved] | |
| 40:2.0.1.1.2.25.11.20.35 | APPENDIX Appendix S
| Appendix S to Part 51 - Emission Offset Interpretative Ruling | |
| 40:2.0.1.1.2.25.11.20.36 | APPENDIX
| Appendixes T-U to Part 51 [Reserved] | |
| 40:2.0.1.1.2.25.11.20.37 | APPENDIX Appendix V
| Appendix V to Part 51 - Criteria for Determining the Completeness of Plan Submissions | |
| 40:2.0.1.1.2.25.11.20.38 | APPENDIX Appendix W
| Appendix W to Part 51 - Guideline on Air Quality Models | |
| 40:2.0.1.1.2.25.11.20.39 | APPENDIX Appendix X
| Appendix X to Part 51 - Examples of Economic Incentive Programs | |
| 40:2.0.1.1.2.25.11.20.40 | APPENDIX Appendix Y
| Appendix Y to Part 51 - Guidelines for BART Determinations Under the Regional Haze Rule | |