Environmental Services

Air Compliance


Cornerstone offers the long-term support and expertise you need to achieve Clean Air Act regulatory compliance and address ongoing challenges with emissions and permitting.

Securing an air quality permit is important, but it’s only one step in the process of achieving and maintaining compliance with the Clean Air Act. When you partner with Cornerstone, you get a team of experts you can lean on for the time-consuming, technical, and evolving tasks of managing your emissions auditing, permitting, recordkeeping, and reporting — not just today, but for years to come.

Air Permitting Methodology

Since every client is unique, we’ll customize our approach to fit your exact needs. We can support you at any point in the following framework:  

  1. Evaluate conditions
    Our team will analyze your facility’s business activities and emissions to determine if a permit is required and, if so, which permit type is correct.

  2. Guide you through the permitting process
    We’ll explain the relevant permitting processes for your federal, state/provincial, and local agencies and help you take the steps needed to achieve compliance.

  3. Follow-up and negotiations
    After a permit application is submitted, our project manager will continue to follow up with the regulatory agency to address questions and negotiate the most favorable permit conditions available.

  4. Manage ongoing compliance
    After your permit is issued, we will work with you to monitor your emissions, providing all of the recordkeeping and reporting needed to maintain compliance and guiding you through updates when laws or equipment change.

Custom Services for Specific Needs

As your partners in compliance, we offer a personal approach. Our team will tailor our services to meet your specific industry, location, or goals, including:  

  • Air permitting (Title V, PSD, Minor, Synthetic Minor)

  • National Emission Standards for Hazardous Air Pollutants (NESHAP) and Maximum Achievable Control Technology (MACT) compliance

  • Stack testing and emissions modeling

  • Greenhouse Gas (GHG) reporting and evaluation

  • Continuous Emissions Monitoring System (CEMS) support

  • Risk management plans and Section 114 response support

  • Written plans and training

Understanding the Clean Air Act

The Clean Air Act (CAA) is a U.S. federal law that regulates air emissions from stationary and mobile sources. The Act empowers the Environmental Protection Agency (EPA) to establish National Ambient Air Quality Standards (NAAQS) to protect public health and public welfare and to regulate emissions of hazardous air pollutants.


We’re here to help!

Contact us to learn more about how we can help your organization with Clean Air Act compliance.

Our clients receive:


Industry expertise in air compliance

Customized approach

Permitting support

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