A Guide to the Clean Air Act Minor New Source Review Permit Requirements, Process, and Compliance

The Clean Air Act Minor New Source Review Permit Guide is an invaluable resource for navigating the complex world of air quality permitting. This comprehensive guide delves into the intricacies of the Minor NSR permit, offering a clear and concise understanding of its regulatory context, application requirements, and compliance obligations. From pre-application considerations to post-permit management, this guide covers all the critical aspects of the permitting process, with a special focus on leveraging cutting-edge technologies like Transect for efficient site selection and environmental due diligence. By exploring the common challenges, best practices, and recent updates in Minor NSR permitting, this guide equips readers with the knowledge and tools necessary to successfully obtain and maintain compliance with this essential permit. Whether dealing with emission limits, monitoring requirements, or reporting obligations, this guide serves as a go-to reference for ensuring responsible and sustainable project development in full compliance with the Clean Air Act.


Clean Air Act Minor New Source Review Permit Key Details

Issuing Agency: U.S. Environmental Protection Agency (EPA) and state/local/tribal air pollution control agencies Year Established: 1977 as part of the Clean Air Act Amendments Legal References: Clean Air Act (42 U.S.C. §7401 et seq.), 40 C.F.R. §§ 49.151-49.165 Most Recent Amendment: 2011 Permit Also Known As: Minor NSR Permit, Minor Source Permit

Clean Air Act Minor New Source Review Permit Overview

The Clean Air Act Minor New Source Review (NSR) Permit is a preconstruction permit required for the construction or modification of air pollution sources that do not exceed major source emission thresholds as defined by the Clean Air Act. The Minor NSR permit is part of the broader New Source Review permitting program established under the Clean Air Act Amendments of 1977, which aims to ensure that air quality is not significantly degraded by the addition of new or modified sources of air pollution.

The U.S. Environmental Protection Agency (EPA) sets the overall regulatory framework and requirements for the Minor NSR permit program. However, most Minor NSR permits are issued by state, local, or tribal air pollution control agencies, as the EPA has delegated permitting authority to these agencies in many areas. In some cases, the EPA may retain direct permitting authority, particularly on tribal lands.

Over time, the Minor NSR permit program has evolved in response to amendments to the Clean Air Act and related regulations. The most recent significant changes occurred in 2011 when the EPA finalized revisions to the Minor NSR permitting rules for Indian country, establishing a more comprehensive and consistent approach to permitting in these areas.

Which Resources Are Regulated By Minor NSR?

The Clean Air Act Minor New Source Review Permit regulates emissions of air pollutants into the atmosphere. Specifically, the permit aims to protect ambient air quality by limiting emissions from new or modified sources that do not exceed major source thresholds. The pollutants regulated under the Minor NSR permit include:

  1. Criteria pollutants: particulate matter (PM10 and PM2.5), sulfur dioxide (SO2), nitrogen oxides (NOx), carbon monoxide (CO), ozone (O3), and lead (Pb). National Ambient Air Quality Standards (NAAQS) have been established for these pollutants.

  2. Other pollutants: depending on the specific state, local, or tribal permitting program, Minor NSR permits may also regulate emissions of other pollutants such as volatile organic compounds (VOCs), greenhouse gases (GHGs), and hazardous air pollutants (HAPs).

By requiring new or modified sources to obtain a Minor NSR permit before construction, the permitting process ensures that these sources will not cause or contribute to violations of air quality standards or significantly degrade air quality. The permit may require the installation of air pollution control technologies, adherence to operational limits, and ongoing monitoring and reporting to maintain compliance.


When Clean Air Act Minor New Source Review Permits Are Required

The Clean Air Act (CAA) Minor New Source Review (NSR) permit is required for the construction or modification of stationary sources that emit regulated air pollutants below the major source thresholds, but above certain emission levels specified by the United States Environmental Protection Agency (EPA) or the relevant state or local permitting authority. The Minor NSR permit ensures that these sources do not cause or contribute to violations of the National Ambient Air Quality Standards (NAAQS) or other air quality standards.

The following table outlines the types of activities, actions, and materials that may trigger the need for a CAA Minor NSR permit, along with the associated environmental considerations or potential impacts:

Activity/Action/MaterialEnvironmental Considerations or Potential Impacts
Construction of a new stationary sourceEmissions of regulated air pollutants, such as nitrogen oxides (NOx), sulfur dioxide (SO2), particulate matter (PM), and volatile organic compounds (VOCs), which can impact local and regional air quality and contribute to the formation of smog and acid rain.
Modification of an existing stationary sourceIncreased emissions of regulated air pollutants due to changes in the source's design, operation, or capacity, which can worsen existing air quality issues or lead to new violations of the NAAQS or other air quality standards.
Use of certain raw materials or fuelsEmissions of hazardous air pollutants (HAPs), such as mercury, lead, and benzene, which can pose significant risks to human health and the environment, even at low concentrations.
Installation of new emission control equipmentPotential secondary impacts, such as increased energy consumption or the generation of solid or hazardous waste, associated with the operation and maintenance of the control equipment.

It is important to note that the specific emission thresholds and permitting requirements for Minor NSR permits vary by jurisdiction and may be more stringent than the federal standards set by the EPA. Project proponents should consult with the relevant state or local permitting authority to determine the applicability of the Minor NSR permit to their specific project.

Clean Air Act Minor New Source Review Permit Exemptions

While the Clean Air Act (CAA) Minor New Source Review (NSR) permit is required for many projects involving the construction or modification of stationary sources, certain activities are exempt from the permit requirements. These exemptions are designed to reduce the regulatory burden on sources that have minimal environmental impacts or are subject to other regulations that effectively control their emissions.

Some common exemptions from the CAA Minor NSR permit requirements include:

  1. De minimis exemptions: Sources with emissions below certain thresholds, which vary by pollutant and jurisdiction, may be exempt from the Minor NSR permit requirements. For example, the EPA has established de minimis levels for criteria pollutants, such as 5 tons per year for lead and 10 tons per year for PM10.1

  2. Routine maintenance, repair, and replacement: Activities that involve the routine maintenance, repair, or replacement of existing equipment or facilities, without resulting in a significant increase in emissions, are typically exempt from the Minor NSR permit requirements.

  3. Temporary sources: Portable or temporary sources, such as generators or drilling rigs, that operate for a limited duration and meet certain conditions, may be exempt from the Minor NSR permit requirements.

  4. Emergency equipment: Stationary sources that are used solely for emergency purposes, such as emergency generators or firefighting equipment, are often exempt from the Minor NSR permit requirements, provided they meet certain operating and recordkeeping requirements.

To determine if a project qualifies for an exemption, project proponents should carefully review the applicable regulations and guidance documents provided by the EPA and the relevant state or local permitting authority. In some cases, it may be necessary to provide documentation or emissions calculations to demonstrate that a project meets the criteria for an exemption.

It is always recommended to consult with the appropriate regulatory agency to confirm the applicability of an exemption, as the specific requirements and interpretations may vary by jurisdiction. Early consultation can help avoid delays or compliance issues later in the project development process.


Minor NSR Permit Permit Pre-Application Considerations & Planning

Diagram of Minor NSR Permit Permit Pre-Application Considerations & Planning
Diagram of Minor NSR Permit Permit Pre-Application Considerations & Planning

The Minor NSR Permit permitting process typically involves several key phases and milestones that should be carefully considered and planned for within the overall project life cycle. These phases include:

  1. Project Conception & Feasibility: Initial project planning, site selection, and assessment of environmental impacts and regulatory requirements.
  2. Pre-Application Consultation: Early engagement with the permitting agency to discuss project details, application requirements, and potential concerns.
  3. Application Preparation & Submission: Gathering required information, conducting necessary studies, and preparing and submitting the permit application.
  4. Agency Review & Public Comment: The permitting agency's technical review of the application, along with a public notice and comment period.
  5. Permit Decision: The agency's final determination to approve, approve with conditions, or deny the permit.
  6. Compliance & Reporting: Ongoing adherence to permit conditions, monitoring, and reporting requirements throughout the life of the project.

Here's a sample timeline illustrating how the Minor NSR Permit permit process might fit into a typical project life cycle:

Project PhaseDurationPermit Touchpoints
Conception & Feasibility6-12 monthsDetermine Minor NSR Permit applicability
Pre-Application Consultation1-3 monthsMeet with permitting agency to discuss project and application requirements
Application Preparation & Submission3-6 monthsGather information, conduct studies, and submit application
Agency Review & Public Comment6-12 monthsRespond to agency requests for additional information and public comments
Permit Decision1-3 monthsReceive permit decision and review conditions
Compliance & ReportingOngoingAdhere to permit conditions and submit required reports

The Minor NSR Permit permit process can significantly influence key project decisions and timelines. For example, the need for extensive air quality modeling or emission control technologies may impact site selection, facility design, and construction schedules. Early identification of permit requirements and proactive engagement with the permitting agency can help minimize delays and ensure a smoother path to project completion.

Minor NSR Permit Application Requirements & Submission

A complete Minor NSR Permit permit application typically requires the submission of several key components, each designed to provide the permitting agency with the information necessary to evaluate the project's potential air quality impacts and compliance with applicable regulations. These components may include:

  1. Facility and Project Description: A detailed narrative describing the proposed facility, its location, the industrial processes and equipment involved, and the types and quantities of raw materials, fuels, and products.2

  2. Emissions Inventory: A comprehensive accounting of all air pollutants that will be emitted by the facility, including criteria pollutants, hazardous air pollutants (HAPs), and greenhouse gases (GHGs). This inventory should include emissions from all sources, such as process equipment, fuel combustion, storage tanks, and fugitive emissions.3

  3. Air Quality Modeling: Dispersion modeling results demonstrating that the facility's emissions will not cause or contribute to violations of National Ambient Air Quality Standards (NAAQS) or exceed applicable Prevention of Significant Deterioration (PSD) increments.

  4. Best Available Control Technology (BACT) Analysis: For PSD permits, a detailed analysis of available emission control technologies for each regulated pollutant, considering energy, environmental, and economic impacts.4

  5. Compliance Demonstration: A description of how the facility will comply with all applicable air quality regulations, including emission limits, monitoring, recordkeeping, and reporting requirements.5

  6. Public Participation Plan: A plan for providing public notice of the permit application, holding public hearings or meetings, and responding to public comments.6

These application components aim to demonstrate that the proposed facility will not cause or contribute to air pollution in excess of applicable standards, that it will employ appropriate emission control technologies, and that it will comply with all relevant regulations. The permitting agency will review the application for completeness and technical adequacy before proceeding with the permit review process.

The Minor NSR Permit Review & Decision Process

The ideal timing for initiating the Minor NSR Permit permit process will depend on the specific circumstances of the project, but generally, it is advisable to begin the process as early as possible in the project's lifecycle. Early engagement with the permitting agency can help identify potential issues and requirements, allowing for more effective project planning and design.

The chronological steps of the Minor NSR Permit permit review and decision process typically include:

  1. Pre-Application Consultation: The applicant meets with the permitting agency to discuss the project, identify applicable requirements, and clarify application procedures. This step can help ensure a more complete and accurate application.

  2. Application Submission: The applicant prepares and submits a complete permit application, including all required forms, documentation, and technical analyses.

  3. Completeness Review: The permitting agency reviews the application for completeness, typically within 30 days of receipt. If the application is incomplete, the agency will request additional information from the applicant.

  4. Technical Review: Once the application is deemed complete, the permitting agency conducts a thorough technical review to evaluate the project's potential air quality impacts, proposed emission controls, and compliance with applicable regulations. This review may involve requests for additional information or clarification from the applicant.

  5. Draft Permit & Public Comment: If the permitting agency determines that the project meets all applicable requirements, it will prepare a draft permit and provide public notice of the proposed action. The public comment period typically lasts 30 to 60 days, during which the agency will accept written comments and may hold public hearings.

  6. Final Permit Decision: After considering all public comments and making any necessary revisions, the permitting agency will issue a final permit decision. If approved, the permit will include specific conditions and requirements that the facility must meet to maintain compliance.

The entire Minor NSR Permit permit review process can take anywhere from a few months to over a year, depending on the complexity of the project, the quality and completeness of the application, and the level of public interest or concern.

Key approval criteria for a Minor NSR Permit permit include:

  • Demonstration that the project will not cause or contribute to violations of NAAQS or PSD increments
  • Application of BACT for regulated pollutants (for PSD permits)
  • Compliance with all applicable federal, state, and local air quality regulations
  • Adequate public participation and consideration of public comments

Minor NSR Permit Public Participation & Stakeholder Engagement

Public participation is an essential component of the Minor NSR Permit permitting process, as it provides an opportunity for interested parties to review and comment on the proposed project and its potential air quality impacts. The permitting agency is required to provide public notice of the draft permit and allow for a reasonable public comment period, typically lasting 30 to 60 days.7

Public input can take several forms, including:

  1. Written Comments: Interested parties may submit written comments on the draft permit, expressing support, opposition, or suggesting changes to the permit conditions.

  2. Public Hearings: The permitting agency may hold public hearings to provide an opportunity for oral testimony on the draft permit. Hearings are typically held at a location near the proposed project site to facilitate public attendance.

  3. Information Meetings: In some cases, the permitting agency or the applicant may hold informal public meetings to provide information about the project and answer questions from the community.

The permitting agency is obligated to consider all substantive comments received during the public comment period. This means that the agency must evaluate and respond to comments that raise significant air quality concerns or suggest changes to the draft permit. The agency's responses to comments are typically documented in a written report or memorandum, which is made available to the public along with the final permit decision.

Public participation is important for several reasons:

  • It allows for a diverse range of perspectives and concerns to be heard and considered in the permitting process.
  • It can help identify potential air quality impacts or compliance issues that may have been overlooked in the initial application.
  • It promotes transparency and accountability in the permitting process, building public trust and confidence in the regulatory system.
  • It can lead to more robust and enforceable permit conditions that better protect public health and the environment.

Effective public participation requires proactive outreach and engagement by both the permitting agency and the permit applicant. This may involve holding community meetings, distributing informational materials, and working with local organizations to ensure that all interested parties have an opportunity to participate in the process.

Common Challenges and Pitfalls in the Minor NSR Permit Permit Process

The Minor NSR Permit permitting process can be complex and time-consuming, and project proponents may encounter several common challenges or pitfalls along the way. These can include:

  1. Incomplete or Inadequate Application: Submitting an incomplete or technically deficient application can significantly delay the permit process, as the permitting agency will require additional information or revisions before proceeding with the review.

  2. Underestimating Emission Calculations: Inaccurate or underestimated emissions inventories can lead to permit denials or the need for additional emission controls, which can impact project costs and timelines.

  3. Failing to Engage Stakeholders Early: Neglecting to engage with the permitting agency, local community, or other stakeholders early in the process can lead to unexpected opposition or concerns that may delay or derail the project.

  4. Not Allowing Sufficient Time for Permit Review: The Minor NSR Permit permit process can take several months to a year or more, depending on the complexity of the project and the level of public interest. Failing to budget adequate time for the permit review can disrupt project schedules and financing.

  5. Inadequate Public Outreach: Providing insufficient or ineffective public outreach can lead to misunderstandings, mistrust, and opposition to the project, which can prolong the permit process and even lead to legal challenges.

To overcome these challenges and avoid common pitfalls, project proponents should:

  • Engage with the permitting agency early and often to ensure a clear understanding of application requirements and expectations.
  • Conduct thorough and accurate emission calculations using the most up-to-date methodologies and emission factors.
  • Identify and engage with key stakeholders, including the local community, early in the process to build trust and address concerns proactively.
  • Allow ample time in the project schedule for permit preparation, review, and public comment, and be prepared for potential delays or setbacks.
  • Develop and implement a robust public outreach plan that provides clear, accessible information about the project and its potential impacts, and that solicits and responds to public input in a meaningful way.

Case studies and examples of successful Minor NSR Permit permit applications can provide valuable lessons and best practices for navigating the process. For example, a recent natural gas compressor station project in Pennsylvania was able to secure its permit in a timely manner by conducting early and frequent engagement with the permitting agency, local officials, and community groups. The project proponents held several public meetings to explain the project and address concerns, and they made several design changes in response to public input, such as relocating equipment to minimize noise and visual impacts.8

By learning from the experiences of others and adopting a proactive, transparent, and responsive approach to the Minor NSR Permit permitting process, project proponents can increase their chances of success while building positive relationships with regulators and the public.


Leveraging Technology for Clean Air Act Minor New Source Review Permit Compliance

Technology plays a crucial role in streamlining and enhancing compliance with the Clean Air Act Minor New Source Review (NSR) permit. By leveraging data management, site assessment, and monitoring tools, permit holders can improve efficiency, accuracy, and transparency throughout the compliance process.

Benefits of using technology for permit compliance include:

  • Automated data collection and analysis, reducing manual errors and saving time
  • Real-time monitoring of emissions and other key parameters, enabling proactive compliance management
  • Centralized data storage and access, facilitating collaboration and reporting
  • Improved accuracy and consistency in site assessments and impact evaluations
  • Enhanced transparency and accountability through digital record-keeping and audit trails

Common tools and platforms used in the industry for Clean Air Act Minor NSR permit compliance include:

Tool/Platform TypeExamplesKey Features
Environmental Management Information Systems (EMIS)EnablonIntegrated data management, reporting, and analytics
Continuous Emissions Monitoring Systems (CEMS)ABBReal-time emissions monitoring and data acquisition
Air Dispersion Modeling SoftwareAERMOD, CALPUFF, SCICHEMModeling of air pollutant dispersion and impacts
Geographic Information Systems (GIS)MapInfoSpatial data analysis and visualization for site assessment

By adopting these technologies, permit holders can streamline their compliance efforts, reduce the risk of violations, and demonstrate their commitment to environmental stewardship.

Transect: An Innovative Solution for Site Selection & Environmental Due Diligence

Transect is an all-in-one environmental due diligence solution that combines software knowledge with hands-on field experience to revolutionize site selection and permitting for industries such as solar, wind, renewable energy, and more. This innovative platform offers a range of features and benefits that can help developers and permit applicants streamline their processes, reduce costs and delays, and ensure ongoing compliance with Clean Air Act Minor New Source Review (NSR) permit requirements.

Key features and benefits of Transect include:

  • Swift site pinpointing and suitability analysis, enabling rapid identification of optimal project locations
  • Real-time data updates and critical issues identification, allowing for proactive risk mitigation and decision-making
  • Versatility across multiple industries and project types, providing a comprehensive solution for diverse needs
  • User-friendly interface and intuitive workflow, empowering users to efficiently navigate the platform and access critical information
  • Efficiency gains and cost savings compared to traditional methods, reducing the time and resources required for site selection and permitting
  • Proactive risk mitigation and compliance assurance, helping users identify and address potential issues before they become significant obstacles

By leveraging Transect's unique capabilities, developers and permit applicants can:

  • Quickly identify suitable sites for their projects, taking into account a wide range of environmental, regulatory, and technical factors
  • Access up-to-date information on Clean Air Act Minor NSR permit requirements and other relevant regulations, ensuring ongoing compliance
  • Collaborate effectively with stakeholders and decision-makers, sharing data and insights in real-time
  • Minimize the risk of project delays, cost overruns, and compliance violations, thanks to proactive planning and risk management
  • Demonstrate their commitment to environmental stewardship and responsible development, building trust with communities and regulators

In summary, Transect offers a powerful and innovative solution for site selection and environmental due diligence, helping users navigate the complex landscape of Clean Air Act Minor NSR permitting and compliance with greater efficiency, accuracy, and confidence.


Minor NSR Permit Permit Conditions & Compliance Obligations

A Minor NSR permit typically includes a range of conditions and requirements designed to minimize the environmental impact of the permitted facility and ensure ongoing compliance with the Clean Air Act. These conditions may include:

  1. Emission limits: The permit will specify allowable emission rates for regulated pollutants, often based on the facility's potential to emit and the applicable air quality standards.9

  2. Monitoring requirements: The permit may require the installation and operation of continuous emission monitoring systems (CEMS) or periodic stack testing to verify compliance with emission limits.10

  3. Recordkeeping and reporting: The facility must maintain detailed records of its operations, emissions, and compliance activities, and submit regular reports to the permitting agency.11

  4. Best management practices: The permit may require the implementation of specific operational practices or control technologies to minimize emissions and environmental impacts.

  5. Mitigation measures: In some cases, the permit may require the facility to offset its emissions through the purchase of emission reduction credits or the implementation of off-site mitigation projects.12

It is crucial for the facility owner or operator to thoroughly understand and strictly adhere to all permit conditions to maintain compliance with the Minor NSR program and avoid enforcement actions. Regular compliance audits, employee training, and proactive communication with the permitting agency can help ensure ongoing compliance and promptly address any issues that may arise.

Minor NSR Permit Monitoring, Reporting & Recordkeeping Requirements

Minor NSR permits typically include ongoing monitoring, reporting, and recordkeeping requirements to ensure that the facility remains in compliance with its permit conditions and the Clean Air Act. These requirements may include:

  1. Emissions monitoring: The facility may be required to install and operate CEMS or conduct periodic stack testing to measure its actual emissions and demonstrate compliance with permit limits.13

  2. Recordkeeping: The facility must maintain detailed records of its operations, emission control activities, and compliance status, including:

    • Emission calculations and supporting data
    • Control equipment maintenance and performance records
    • Fuel consumption and composition records
    • Records of any excess emissions or malfunctions14
  3. Reporting: The facility must submit regular compliance reports to the permitting agency, typically on a semi-annual or annual basis. These reports should include:

    • Actual emission data and calculations
    • Compliance status and any instances of non-compliance
    • Explanation of any excess emissions or malfunctions and corrective actions taken15

The facility must retain all required records for a specified period, typically five years, and make them available for inspection by the permitting agency upon request.16 Accurate and timely completion of monitoring, reporting, and recordkeeping requirements is essential to demonstrate ongoing compliance and maintain the validity of the Minor NSR permit.

Enforcement and Penalties for Non-Compliance with Minor NSR Permit

Failure to comply with the conditions of a Minor NSR permit or the requirements of the Clean Air Act can result in significant penalties and enforcement actions. The EPA and state or local permitting agencies have the authority to enforce Minor NSR permits through various means, including:17

  1. Administrative penalties: The EPA may assess administrative penalties of up to $37,500 per day per violation, with a maximum penalty of $320,000.18

  2. Civil fines: The EPA may file a civil lawsuit seeking penalties of up to $37,500 per day per violation, with no maximum limit.19

  3. Criminal charges: In cases of knowing or willful violations, the EPA may pursue criminal charges against responsible individuals, with potential penalties including fines and imprisonment.20

  4. Permit revocation or modification: The permitting agency may revoke or modify the Minor NSR permit in response to serious or repeated violations.21

Common violations that may trigger enforcement actions include exceeding emission limits, failing to install or properly operate control equipment, inadequate recordkeeping or reporting, and failure to obtain a permit for a new or modified source.

To mitigate the risk of enforcement actions, facilities should promptly report any instances of non-compliance to the permitting agency and take immediate corrective action to address the issue. Proactive communication and cooperation with the agency can help demonstrate good faith efforts to maintain compliance and potentially reduce the severity of any penalties.


Recent Changes & Updates to Clean Air Act Minor New Source Review Permit

The Clean Air Act Minor New Source Review (NSR) permit has undergone several changes in recent years, reflecting evolving regulations and legal decisions. Some of the most significant updates include:

  1. 2016 - Source Determination Rule: In October 2016, the Environmental Protection Agency (EPA) finalized amendments to the NSR permitting regulations to clarify the term "adjacent" and improve the process for determining the scope of a "stationary source" in the oil and natural gas sector. This rule aimed to provide greater regulatory certainty and ensure consistent permitting decisions across jurisdictions.

  2. 2018 - Project Emissions Accounting: In March 2018, the EPA issued guidance on "project emissions accounting" under the NSR permitting program. This guidance clarified that both emissions increases and decreases resulting from a proposed project should be considered when determining if a project requires NSR permitting. This approach is intended to provide a more accurate assessment of a project's net emissions impact.

  3. 2019 - Affordable Clean Energy Rule: In June 2019, the EPA finalized the Affordable Clean Energy (ACE) rule, which replaced the Clean Power Plan and revised the NSR permitting requirements for power plants. The ACE rule established emission guidelines for states to use when developing plans to limit carbon dioxide emissions at coal-fired power plants, and it modified the NSR applicability test for these facilities.

  4. 2020 - Once-In-Always-In Policy: In October 2020, the EPA issued a final rule to revise the "once-in-always-in" policy for major sources under the Clean Air Act. This change allows major sources of hazardous air pollutants to limit their potential to emit and become area sources, potentially avoiding more stringent major source requirements and the need for a Title V operating permit.

These updates reflect the ongoing efforts to streamline and clarify the Clean Air Act Minor NSR permit requirements while maintaining public health and environmental protection standards. Developers and environmental professionals should stay informed about these changes and consult the latest EPA guidance when navigating the permitting process.

Additional Resources & Information

For more information on the Clean Air Act Minor New Source Review permit, consult the following resources:

  1. EPA's NSR Permitting Website - This comprehensive website provides an overview of the NSR permitting program, including background information, regulatory requirements, and guidance documents.

  2. Minor NSR Basic Information: https://www.epa.gov/nsr/minor-nsr-basic-information - This page offers a concise summary of the Minor NSR permit, including its applicability, requirements, and the permitting process.

These resources offer valuable information and guidance for developers, environmental professionals, and other stakeholders seeking to understand and comply with the Clean Air Act Minor NSR permit requirements.


  1. 40 C.F.R. § 51.165(a)(1)(x)(A) (2021).

  2. U.S. Environmental Protection Agency. (2016)

  3. 40 C.F.R. § 52.21(n)

  4. 40 C.F.R. § 52.21(j)

  5. 40 C.F.R. § 52.21(r)

  6. 40 C.F.R. § 52.21(q)

  7. 40 C.F.R. § 52.21(q)

  8. Federal Energy Regulatory Commission. (2018). Transcontinental Gas Pipe Line Company, LLC; Notice of Intent to Prepare an Environmental Assessment for the Planned Gateway Expansion Project, Request for Comments on Environmental Issues, and Notice of Public Scoping Sessions. https://www.federalregister.gov/documents/2018/09/07/2018-19471/transcontinental-gas-pipe-line-company-llc-notice-of-intent-to-prepare-an-environmental-assessment

  9. 40 C.F.R. § 51.160(a)

  10. 40 C.F.R. § 51.166(b)(12)

  11. 40 C.F.R. § 51.166(r)(6)(iii)

  12. 40 C.F.R. § 51.165(a)(3)

  13. 40 C.F.R. § 51.166(b)(12)

  14. 40 C.F.R. § 51.166(r)(6)(iii)

  15. 40 C.F.R. § 51.166(r)(6)(v)

  16. 40 C.F.R. § 51.166(r)(6)(iii)

  17. U.S. EPA, "Enforcement," accessed April 18, 2023, https://www.epa.gov/enforcement

  18. 42 U.S.C. § 7413(d)(1)

  19. 42 U.S.C. § 7413(b)

  20. 42 U.S.C. § 7413(c)

  21. 40 C.F.R. § 51.166(r)(2)

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A Note to Our Readers: We hope this guide is a valuable resource in helping you better understand the Minor NSR Permit. However, it's not a substitute for professional advice and doesn't cover every scenario. Always consult with regulatory bodies and professionals for the most current advice and project-specific guidance.