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:

Coming Soon: Cumulative Impact Analyses (CIA) for Certain Categories of Air Quality Permits

Posted: November 2021

ALL4 has seen interest and activity around Cumulative Impacts Analyses (CIA) for air emissions sources lately, both at the federal and state level.  For example, the Governor of Massachusetts, Charlie Baker, signed “An Act Creating a Next Generation Roadmap for […]

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U.S. EPA Reverses Reversal of 2015 SSM SIP Policy

Posted: October 2021

On October 9, 2020, the U.S. Environmental Protection Agency (U.S. EPA) issued a guidance memorandum regarding a change in policy for certain startup, shutdown, and malfunction (SSM) provisions in State Implementation Plans (SIPs) pursuant to the Clean Air Act (CAA).  […]

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Addition of 1-Bromopropane to Clean Air Act Section 112 HAP List – What does it Mean?

Posted: October 2021

The U.S. EPA published an advanced notice of proposed rulemaking (ANPR) on June 11, 2021 to address the impacts of adding 1-Bromopropane (n-propyl bromide or NPB) to the hazardous air pollutant (HAP) list in the clean air act (CAA).  The […]

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Significant Changes on the Way for California Emission Reporting

Posted: October 2021

Over thirty years ago the State of California enacted the Air Toxics “Hot Spots” Information and Assessment Act, which was designed to provide direction to facilities reporting emissions data under the Emission Inventory Criteria and Guideline Regulation (EICG).  A need […]

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Updates to Guidance on Ozone and Fine Particulate Matter Permit Modeling Issued by U.S. EPA

Posted: October 2021

U.S. EPA’s Office of Air Quality Planning and Standards (OAQPS) published the “Revised DRAFT Guidance for Ozone and Fine Particulate Matter Permit Modeling” (Revised Draft Guidance) on September 20, 2021.  The Revised Draft Guidance replaces the initial “DRAFT Guidance for Ozone […]

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Forest Products Industry Environmental Updates

Posted: October 2021

ALL4 has a long history of working with the forest products industry and participating in various industry associations to stay on top of the latest environmental policy and regulatory activities affecting our clients. We provide some updates on environmental activity […]

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Navigating Kentucky’s Nonattainment Status

Posted: September 2021

In October 2015, the U.S. Environmental Protection Agency (EPA) revised the primary and secondary ozone standards to a level of 70 parts per billion (ppb). Based on the new National Ambient Air Quality Standards (NAAQS), U.S. EPA uses national air […]

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Recap of the Kentucky Chamber 24th Annual Environmental Permitting and Reporting Conference

Posted: September 2021

The Kentucky Chamber hosted a hybrid (virtual and in-person) conference on August 12 -13, 2021 that included updates from the Kentucky Environmental and Energy Cabinet, consultants, lawyers, and corporate managers.  A few notable items we heard are shared below. Air […]

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Proposed Changes to New Hampshire Air Toxics Rules and Potential Ramifications to Stakeholders

Posted: September 2021

ALL4 is pleased to continue providing updates regarding changes to New Hampshire air toxics rules and the impacts to stakeholders responsible for compliance.  In April 2021, ALL4 presented, “Changes to the New Hampshire Air Toxics Rule:  What Could it Mean […]

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Pennsylvania Updates Air Permitting Exemption Document

Posted: September 2021

On June 26, 2021, the Pennsylvania Department of Environmental Protection (PADEP) published a notice in the Pennsylvania Bulletin, finalizing amendments to the Air Quality Permit Exemptions document (guidance or exemption document), PADEP ID: 275-2101-003, which was last updated in 2018.  This […]

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