Air Quality Consulting Solutions

ALL4 Air Quality Expertise

ALL4 was founded by air quality consulting experts and our air quality consulting services remain a key technical focus for us.  Our air quality practice is made up of technical staff at all levels, from recent college graduates to nationally-known experts with over 40 years of experience.  Our experienced consultants are on top of the air quality regulatory and technical drivers that facilities need to strategically address and are well-versed in all aspects of air permitting, compliance, modeling, and monitoring.  We specialize in solving challenges associated with complex projects.

Why use an Air Quality Consultant?

The federal air quality regulations are accompanied by thousands of pages of interpretive guidance and each state has their own air quality regulations and permitting procedures.  Interpreting this information can be difficult and time consuming if you don’t specialize in air quality consulting.  ALL4’s experienced air quality consultants can help a facility develop a site-specific permitting and compliance strategy, prepare a permit application and air dispersion modeling analysis, develop required plans, document ongoing compliance requirements, monitor compliance status, and submit required reports.  Our consultants have also worked with facilities to streamline compliance activities, permit alternate compliance approaches, add flexibility to air permits, reduce air regulatory burden, effect changes to regulations, and provide onsite compliance support.

ALL4 Air Quality Services

ALL4 provides the following air quality services:

Air Regulatory Strategy and Advocacy

  • Support to industry associations evaluating air regulatory proposals
  • Developing strategies for compliance with new requirements
  • Evaluating whether facilities are located in Environmental Justice communities and preparing communication and permitting strategies for upcoming projects
  • Climate and sustainability related services, such as carbon footprinting, energy strategy, and resiliency evaluations.
  • Negotiating site-specific air quality requirements

Air Quality Permitting

  • Permit strategy
  • Construction and operating permit applications
  • Emissions inventories and emissions factor development
  • Control technology evaluations
  • Innovative and flexible approaches
  • Emissions offsets and trading
  • Plantwide Applicability Limits
  • Planning for stakeholder involvement

Air Quality Compliance

  • Regulatory compliance plans and programs
  • Onsite support
  • Compliance evaluations
  • Stack testing planning and management
  • Reporting support
  • Training

Air Quality Modeling

  • Various air dispersion models
  • Criteria pollutant and air toxics impact evaluations
  • Risk assessments
  • Risk management planning

Ambient Pollutant and Meteorological Monitoring

  • Emissions and meteorological data collection and processing
  • Data quality assessments
  • Evaluation of small sensor data

Continuous Monitoring Systems Implementation and Compliance

  • Procurement and integration of new monitoring systems
  • Data acquisition and handling system implementation and optimization
  • Alternative monitoring requests
  • Data evaluation, management, and reporting
  • Training

Why Use ALL4?

ALL4’s air quality consultants are second to none.  Our team includes engineers and scientists that have expertise across a variety of industries and states and are dedicated to providing excellent service to assist our clients with meeting their air quality regulatory obligations.  Our clients use us for ongoing air quality support as their sole consultant, on individual permitting and compliance projects, for strategic consulting and planning, and/or for innovative projects.

We actively participate in local and national associations in which our clients are members so that we understand their perspectives and can provide meaningful contributions to regulatory and policy advocacy efforts.  We regularly and freely share air quality regulatory and technical information on our website and via webinars and other presentation formats.  Our clients are our priority and we take ownership when supporting them to achieve their goals.  ALL4 can help you take your project from design to compliance.

Contact an expert

Related Posts:

Texas Releases New Readily Available Permit (RAP) for Power Generation Engines

Posted: June 2022

The Air Permits Division (APD) at the Texas Commission on Environmental Quality (TCEQ) has released a new Readily Available Permit (RAP) for power generation engines. The RAP can be used to authorize up to 10 diesel-fired engines used for the […]

Read article
EPA Publishes 29th Annual U.S. Greenhouse Gas Inventory

Posted: June 2022

In April 2022, the United States Environmental Protection Agency (U.S. EPA) released the 29th annual Inventory of U.S. Greenhouse Gas Emissions and Sinks (GHG Inventory). Background Since 1990, the U.S. EPA has developed a nationwide GHG inventory, engaging researchers, federal […]

Read article
South Coast Air Quality Management District’s Warehouse Indirect Source Rule

Posted: June 2022

South Coast Air Quality Management District (SCAQMD) adopted Rule 2305, Warehouse Indirect Source Rule – Warehouse Actions and Investments to Reduce Emissions (WAIRE) Program in May of 2021.  SCAQMD Rule 2305 applies to warehouses larger than 100,000 square feet and […]

Read article
Is this the “New Normal” for Procuring Monitoring Equipment?

Posted: May 2022

Industrial facilities across the country are continuing to feel the impacts of the global pandemic, rising inflation, and supply chain disruptions.  So how does this affect you and your ability to procure monitoring equipment?  Unfortunately, the answer is that lead […]

Read article
Unpacking U.S. EPA’s Strategic Plan & Budget

Posted: May 2022

The U.S. Environmental Protection Agency (U.S. EPA) published its Strategic Plan for Fiscal Year (FY) 2022-2026 on March 28, 2022. As described by U.S. EPA, “the Strategic Plan provides a roadmap to achieve EPA’s and the Biden-Harris Administration’s environmental priorities […]

Read article
Will Agencies Regulate Air Emissions from Pyrolysis and Gasification Units Like they Regulate Air Emissions from Combustion Units?

Posted: May 2022

Most people are familiar with combustion in some form or another.  Whether it’s a campfire used to roast marshmallows, the oil burner used to heat your house on a cold winter day, or the engine that powers your car, combustion […]

Read article
The Pennsylvania RACT III Rule Is Almost Here

Posted: April 2022

Pennsylvania’s draft rule known as “RACT III” [25 Pa. Code §§ 129.111-129.115, Additional RACT Requirements for Major Sources of NOX and VOCs for the 2015 Ozone NAAQS] has been slowly making its way towards finalization but it’s not there quite […]

Read article
Vapor Intrusion Mitigation Barriers – Bigger Might be Better, But Is It Necessary?

Posted: April 2022

Vapor intrusion (VI) occurs when vapor-forming chemicals migrate from a subsurface source (e.g., contaminated soil or groundwater) into an overlying building, causing a potential human health exposure risk. When VI is suspected or confirmed, the primary method of mitigating the […]

Read article
Internal Revenue Code Section 45Q – Carbon Oxide Sequestration Tax Credit

Posted: April 2022

Congress first introduced section 45Q of the tax code in 2008 as part of the Energy Improvement and Extension Act. The credit is meant to incentivize investment in carbon capture and sequestration (CCS) technologies. The credit also supports beneficial use […]

Read article
Ethylene Oxide Update

Posted: April 2022

UPDATE May 31, 2022: Following U.S. EPA’s nationwide 2021 and 2022 Information Collection Requests (ICR) sent to facilities that use or process ethylene oxide, U.S. EPA is looking to take action on emissions, emissions sources, processes, and control technologies.  Based […]

Read article


    Sign up to receive 4 THE RECORD articles here. You'll get timely articles on current environmental, health, and safety regulatory topics as well as updates on webinars and training events.
    First Name: *
    Last Name: *
    Location: *
    Email: *