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ALL4 is a globally-recognized consulting company shaping environmental responsibility and creating distinction for employees, clients, and partners.

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articles
August 14, 2025

U.S. EPA Proposes a Reconsideration of 2009 Endangerment Finding and Greenhouse Gas Vehicle Standards

Introduction On July 29, 2025, the U.S. Environmental Protection Agency (U.S. EPA) proposed to rescind the 2009 Greenhouse Gas (GHG) Endangerment Finding, which has served as a foundation for regulating GHG emissions from motor vehicles for over a decade. With […]

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articles
August 14, 2025

U.S. EPA Releases Significant Update to AP-42 Section 2.4 for Solid Waste Landfills

In May 2025, the United States Environmental Protection Agency (U.S. EPA) released a significant update to AP-42 Section 2.4 for Municipal Solid Waste Landfills and the associated LandGEM model for estimating air emissions from solid waste landfills. AP-42 Section 2.4 […]

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articles
August 7, 2025

Optimizing Air Emissions Calculations with Digital Solutions: Identifying Air Emissions Templates

What is an Air Emissions “Template”? Templates are used to group similar emissions calculations within digital solution platforms. The way templates are handled varies depending on the software used, but templates are a common concept and approach across software systems. […]

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news
August 13, 2025

ALL4 Ranks No. 2955 on the 2025 Inc. 5000 List of America’s Fastest-Growing Private Companies

With Three-Year Revenue Growth of 139% Percent, This Marks ALL4’s 15th Time on the List NEW YORK, August 12, 2025 – Inc., the leading media brand and playbook for the entrepreneurs and business leaders shaping our future, today announced that […]

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news
July 28, 2025

ALL4 Welcomes Ali Farnoud as Chief Strategy Officer

FOR IMMEDIATE RELEASE Philadelphia, PA (July 28, 2025) – ALL4 is excited to announce the addition of a new strategic leader to the Executive Team: Ali Farnoud has joined as Chief Strategy Officer. This addition underscores ALL4’s commitment to attracting […]

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news
June 4, 2025

ALL4 and KPA Announce Strategic Partnership to Enhance Environmental, Health, and Safety Solutions

June 3, 2025 KIMBERTON, PA and WESTMINSTER, CO  – June 3, 2025 – Today, ALL4 and KPA announced a strategic partnership combining ALL4’s global digital solutions consultancy with KPA’s Flex software. This collaboration aims to provide organizations with EHS best practices, comprehensive […]

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webinars
August 4, 2025

Stormwater Permitting and Compliance: Getting Your Feet Wet

WHAT’S THE WEBINAR ABOUT? In this virtual conversation, we will explore key topics relevant to stormwater permitting and compliance. The session will cover important trends, regulatory developments, and emerging opportunities to help your organization stay informed and ahead of the […]

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webinars
June 18, 2025

Overcoming RCRA Part B Permitting Challenges

A RECORDING OF THE WEBINAR IS NOW AVAILABLE. PLEASE COMPLETE FORM BELOW FOR ACCESS. WHAT’S THE WEBINAR ABOUT? Whether you are applying for a new Part B permit or renewing an existing one, the RCRA Part B permitting process can […]

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webinars
May 7, 2025

TRI Reporting 2025

A RECORDING OF THE WEBINAR IS NOW AVAILABLE. PLEASE COMPLETE FORM BELOW FOR ACCESS. WHAT’S THE WEBINAR ABOUT? Toxics Release Inventory (TRI) reporting for FY 2024 is due July 1st.  The webinar will include updates to the chemical list including […]

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events
August 20, 2025

Georgia Environmental Conference

Join ALL4’s Robert Balaban, Gwynith Howell, and Lizzie Smith at The Annual Georgia Environmental Conference (GEC) in Jekyll Island, Georgia, August 20-22, 2025. Learn more >

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events
August 28, 2025

MTC Maryland Data Center Summit 2025

Join ALL4 staff at MTC’s second annual Maryland Data Center Summit on August 28, 2025 in Hanover, MD. Learn more >

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events
September 8, 2025

Yotta 2025

Join ALL4’s Sharon Sadler at Yotta 2025 in Las Vegas, NV on September 8-10, 2025. Learn more >

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training
March 7, 2024

AQ101

Air Quality 101 (AQ101) Training provides a comprehensive and foundational knowledge of the Clean Air Act (CAA) and its various regulatory programs.  The program covers the history of the CAA, National Ambient Air Quality Standards (NAAQS), and an overview of […]

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training
July 10, 2025

WASTE101

Register Now Syllabus About WASTE101 WASTE101 provides a foundational knowledge of various waste-related regulatory programs, with an emphasis on the Resource Conservation and Recovery Act (RCRA). The program covers the history of waste-related regulations and an overview of regulatory programs […]

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training
August 19, 2024

WATER101

Register Now Syllabus About WATER101 WATER101 provides a foundational knowledge of various water-related regulatory programs, with an emphasis on the Clean Water Act (CWA). The program covers the history of water-related regulations, water quality protections, and an overview of regulatory […]

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Videos
March 6, 2023

ALL4 Services

 ALL4 consults on all matters of environmental, health, and safety, and other regulated areas to help you develop and implement sustainable business strategies and tools. As a team of hands-on experts, we’ve spent decades helping organizations of all sizes […]

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Videos
March 5, 2023

Air Quality (AQ) Training 101

 Air Quality 101 (AQ101) Training provides a comprehensive and foundational knowledge of the Clean Air Act (CAA) and its various regulatory programs.  The program covers the history of the CAA, National Ambient Air Quality Standards (NAAQS), and an overview […]

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Videos
February 21, 2022

Recording Available: EPCRA Part 1 – Tier II Reporting

Tier II reports are due March 1.  Watch our presentation from February 2021 created for professionals with EPCRA reporting responsibilities.

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a culture founded on

excellence & authenticity

A key component of our ability to deliver value for our clients is our unique organizational culture. ALL4 is committed to four core values:

We are authentic in our communication – we advise our clients based on what they need to hear, not what they always “want” to hear. It is this philosophy that has led to long-term consulting relationships with our clients that have stood the test of time.
We take ownership of our clients’ problems and issues – we integrate with our clients’ project teams at a level that has enabled our clients to embrace us as part of their team. Our clients’ issues are our issues and we are always seeking what is in the best interest of our clients.
The foundation for our work is based on accountability and is how we build trust with those we work with, including colleagues, clients, and regulatory agencies.
Our culture grew out of a simple philosophy – a consulting firm’s resources are knowledge and people. We are only as good as our people and have a “best in class” work environment that fosters employee innovation, creativity, and fun. Our culture translates into a very stable workforce, providing consistency, continuity, and quality for our clients.
Our Team Careers

Featured Industries

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Featured Environmental

Consultant Solutions

ALL4 was founded with the goal of providing air quality consulting and have expanded our service offerings to meet changing demands. As a leading environmental compliance company, we can provide assistance with a specific project or ongoing support as you navigate the complex environmental regulatory landscape.

We can act as an extension of your staff or as an outside consultant bringing an objective eye to your processes and policies. We can also assist your management team with big-picture strategies that align environmental compliance with your strategic goals.

Ultimately, we’re a flexible partner that brings a broad spectrum of expertise to every project we work on. Our team consists of engineers, scientists, meteorologists, and other experts, including project managers with a background in environmental regulation and industry.

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Our Commitment to Quality

ALL4 is committed to ensuring that every individual on our team is invested in, and aware of, our QA process. This involves establishing formal protocols and generating buy-in at all levels of our organization. At the heart of our ability to do this is the ALL4 Quality Council. The Quality Council is a dedicated team of professionals who oversee our QA process and arrange regular training sessions to reinforce company-wide best practices.

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shaping the future of

environmental responsibility

Federal, state, and local regulatory agencies all uniquely impact an organization’s environmental obligations. As political allegiances shift and new laws are passed, businesses must remain proactive about the ensuing changes. One of the main benefits of working with an environmental consultant like ALL4 is that we stay on top of an evolving regulatory landscape for you, helping you make smart decisions that position you for future success.

As a leading EHS consulting firm, we respond to these changes and play a role in shaping the future of our industry. By empowering our clients to prioritize environmental governance — and, in fact, to turn what is often viewed as a liability or hassle into something with positive long-term benefits — we help build change from the ground up.

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