Founded in 2000, Alliance Technical Group has grown from a small Alabama stack testing company to North America's leading environmental services provider with 1,805 employees. 2200+ Dedicated Employees 60+ Locations in the US and Canada 110+ Mobile Laboratories Our Journey Founded in 2000 in Alabama as a small stack testing company, Alliance has since expanded into a full-service environmental compliance provider and a recognized leader in the North American market. A lot has changed for us since then, but one thing never will—we still put our clients first. EMPLOYEES 2000–2012 BUILDING THE BUSINESS 2012–2016 GROWTH THROUGH INVESTMENT 2016–2021 RAPID GROWTH & SERVICE LINE EXPANSION 2021–TODAY SCALING A NATIONAL/GLOBAL PLATFORM 2000 2 2005 10 2010 20 2015 50 2018 125 2020 675 2021 820 2022 945 2023 1,430 2024 1,720 2025 2,205 Stack Testing Lab Testing LDAR Ambient Air Consulting CEMS Software We are a new kind of environmental services company—powered by innovation, focused on service, and committed to your success. Acquisitions Since 2017, we have worked to increase our reach and improve our services through investments in our people, technology, and with acquisitions of these core businesses. Expand to see acquired companies 2025 ESC Spectrum Environmental 360 Slipstream Environmental Services 2023-2024 DeNovo Global Technologies Ranger Analytics (Merger) GOLD, LLC CEMServices Rogers & Callcott Advanced Industrial Resources CEMSI Integrity Air Monitoring RSB Environmental Ortech Consulting Chemtech Consulting Group CEC Stack Test Group Summit Env. Tech Orange Coast Analytical Fremont Analytical Chester LabNet 2021-2022 GBMc & Associates EcoTest GuideWare CK Environmental InspectionLogic Pace Environmental CEM Solutions Interpoll Ace Consultants AAS Horizon Air Measurement Services Air Quality Services O’Brien & Gere EMSI Aeros Environmental 2017-2020 Almega Environmental and Technical Blue Mountain Summit Inspection Services METCO Environmental Air Pollution Testing Golden Specialty Our Reach With over 50 testing and laboratory locations across the United States and Canada, we are where you need us. Leadership Our team stands behind everything we do and commits to helping you succeed. From our frontline engineers and technical experts to our senior leaders, we are here for you. FROM LEFT: Chris LeMay, Jim Herr, Kim Van Soelen, Premal Vora, Tyler Rudman Chris LeMay Chief Executive Officer Tyler Rudman Chief Financial Officer Kim Van Soelen Chief Commercial Officer Jim Herr Chief Administrative Officer Premal Vora Chief Strategy Officer Learn more about Alliance Technical Group. Creating new possibilities and outcomes for our clients. Since 2000, we have been solving the problems of environmental management and compliance for some of the foremost companies and brands in North America. From on-site testing and monitoring, to laboratory testing and regulatory strategy, we are pushing out the limits of what is possible. We help our clients achieve their business objectives while also supporting their sustainability goals. OUR SERVICES

Get solutions for your most important and complex compliance challenges. From on-site assessments and monitoring to laboratory analyses for air, water, soil, and waste—Alliance can help you do it better. We are different. While others expect you to adapt to them, we adapt our approach and service delivery to you. We are built from the ground up with a single focus—to provide our clients with compelling responses to their environmental and compliance challenges. We take an innovative, technology-first approach to helping you solve your business problems while minimizing your impact on the environment. Commitment to getting it right. When “good enough” just isn’t enough, turn to us. We build accuracy, precision, and quality into everything we do. Fast and adaptive approach. We design our project teams around your precise goals, quickly deploying the right experts and equipment to meet your needs. Dedicated and experienced experts. Our engineers, scientists, and compliance professionals are creative problem solvers with a total focus on your goals. Technology-powered insight. We help you unify and integrate your initiatives by connecting many sites and data streams into a single easy-to-manage, technology-enabled portfolio. Markets we serve. We support leading companies and brands across a wide range of markets. We understand the special challenges of each sector and have the experience, approach, and capabilities to make a difference. Building & Construction Chemical & Processing Data Centers Energy & Power Environmental & Waste Management Food & Consumer Goods Government & Institutions Manufacturing & Production Oil & Gas Pulp & Paper Semiconductors MARKETS & INDUSTRIES We are problem solvers. Get solutions for your most important and complex compliance challenges. From on-site assessments and monitoring to laboratory analyses for air, water, soil, and waste—Alliance can help you do it better. Environmental Compliance Build your winning regulatory strategy with help from our consultants and compliance experts—who bring the knowledge, insight, and proven industry experience to ensure your success. On-site Testing & Monitoring Expect reliable, on-time results without slowing down operations. For all your testing needs, we have the experienced teams and industry-leading technology to take it on. Laboratory Testing & Analysis Access a world-class lab network that combines broad reach with unmatched responsiveness. From sample collection to analysis, our technicians deliver precision and insight. OUR SERVICES Environmental compliance shouldn’t be an endless costly challenge. We help clients take back control. It starts with a fresh approach. Alliance is a new kind of environmental services company—powered by innovation, focused on service, and committed to client success. ABOUT US

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Decatur, AL and Pensacola, FL – July 7, 2025 Alliance Technical Group (“Alliance”), a premier provider of environmental compliance, on-site testing and monitoring, and laboratory testing services, today announced the acquisition of ESC Spectrum, the premier provider of Continuous Emissions Monitoring Systems (CEMS) and Data Acquisition Systems (DAS) services with more than 50 years of innovation and client success. For decades, ESC Spectrum has helped industrial facilities meet stringent air-emissions regulations through its vertically integrated portfolio of software, hardware, and field services. By bringing ESC Spectrum’s talent and technology into Alliance, the combined organization gains extensive experience in CEMS and DAS engineering, data analytics, integration, and lifecycle support, extending Alliance’s ability to serve clients across every regulated industry and geography. “This transaction is a watershed moment for our company and the emissions monitoring marketplace,” said Chris LeMay, Chief Executive Officer of Alliance. “ESC Spectrum’s proven, end-to-end solutions and scale instantly elevate Alliance to the leading provider of CEMS and DAS services across the globe. Together we will deliver unparalleled value – pairing world-class monitoring technology with the industry’s largest field-service, parts, and technology footprint.” The acquisition enables Alliance to: Deliver the first truly end-to-end CEMS platform – from integration and installation to real-time data management, regulatory reporting, and long-term maintenance Bundle CEMS, Stack Testing, Environmental Compliance, and Laboratory Testing to lower the total cost of compliance and streamline vendor management for clients Scale ESC Spectrum’s commercial model across Alliance’s nationwide service network, accelerating time-to-value for thousands of facilities already under Alliance care Invest in next-generation emissions data analytics, unlocking predictive insights that help clients optimize operations, minimize downtime, and stay ahead of evolving regulations “Joining forces with Alliance amplifies everything we do best,” added Jeff Rabensteine, President of ESC Spectrum. “We now have the resources and reach to accelerate product innovation, expand field support, and ultimately help more clients achieve comprehensive compliance in a rapidly changing regulatory landscape.” The transaction represents a significant milestone in Alliance’s strategic growth plan to assemble the industry’s most specialized technical capabilities under one roof – empowering regulated industries across North America to meet their environmental obligations with confidence. Alliance is backed by Morgan Stanley Capital Partners (MSCP), a leading private equity firm with deep experience supporting growth-oriented businesses in the industrial and environmental services sectors. MSCP has played a critical role in supporting Alliance’s acquisition strategy and operational expansion as the company scales to meet growing regulatory and sustainability demands across the market. Jones Day served as legal advisor to Alliance. Download a copy of this press release

In an industry where regulatory precision meets operational urgency, flexibility and speed are everything. Whether you're responding to a system outage, gearing up for startup testing, or undergoing a site retrofit, Alliance's fleet of Temporary CEMS solutions deliver trusted air monitoring—right where and when you need it.

Alliance Technical Group's GMAP service is a breakthrough in how we monitor and manage air quality. GMAP, which stands for Geospatial Measurement of Air Pollutants, is like a high-tech detective for air pollution. It's a mobile service, meaning our team can travel around, gathering information on various air pollutants. It uses sophisticated technology to analyze this data and create detailed maps showing where these pollutants are most concentrated, helping to pinpoint the sources of pollution. Understanding Air Quality Challenges Air pollution is a complex issue. It's not just about the amount of pollutants in the air, but also about understanding how they move and change over time. Traditional stationary monitoring methods only give us a snapshot of the situation, often missing the bigger picture. Pollution doesn't stay put; it spreads and changes with the wind, weather, and other factors. GMAP's ability to move and track pollution in real time gives us a much clearer view of what's happening with our air quality. How GMAP Makes a Difference GMAP is essentially a mobile laboratory. Our team is equipped with advanced instruments to measure different types of air pollutants at numerous points across the facility, including along the fenceline and surrounding roadways. These instruments include multiple gas analyzers and highly accurate GPS systems for mapping. This technology allows for real-time, on-site air quality assessments, which are crucial for quick and effective environmental management. Alliance also collects weather data, bringing together gas analyzers, wind data, and GPS to generate maps. Wind direction is essential to this process as it allows our team to backtrack from the observed pollutant concentration to the potential emission source(s). Picture a petroleum refinery that needs to ensure it's not exceeding pollution limits. GMAP can be brought in to monitor the air both within and around the facility boundary at any location accessible by vehicles (including the facility fenceline, neighboring communities, etc.), giving instant feedback and helping to pinpoint potential areas of concern relevant to environmental regulatory compliance. Tech Trends and Advancements The technology behind GMAP is part of a larger trend towards smarter, more connected environmental monitoring systems. We're seeing a rise in the use of real-time data analysis, Internet of Things (IoT) devices, and advanced mapping software in environmental science. These tools are making it possible to understand and respond to environmental challenges more quickly and accurately than ever before. Benefits of GMAP Real-time Data and Analysis : The ability to gather and analyze data in real time is a significant advantage. It enables quicker responses to potential environmental hazards and helps in making informed decisions to mitigate risks. Advanced Mapping and Analysis : GMAP's geospatial mapping program enhances the understanding of air pollutant dispersion and source identification, which is crucial for effective air quality management. Mobility and Flexibility : Alliance's GMAP can move across a facility and monitor in real time, a significant advantage compared to stationary monitoring devices. This allows for a full picture of pollutant concentrations across the entire site and is less dependent on wind direction. Contribution to Public Health and Environment : By ensuring better compliance with air quality standards and providing accurate data on pollutant levels, GMAP plays a crucial role in protecting public health and the environment. Potential Results and Impact By providing real-time, accurate information about air pollution, GMAP can have a significant impact on: Improved Public Health : By identifying and addressing pollution sources more quickly, we can reduce exposure to harmful pollutants, leading to healthier communities. Increased Corporate Responsibility : Businesses can use GMAP to monitor their own emissions, helping them to operate more sustainably and responsibly. With its real-time data capabilities, mobile flexibility, and advanced analytical tools, GMAP provides a whole new performance standard for today's air quality challenges. The Alliance team continues to take significant strides forward in our ability to help our clients safeguard their environments and public health. As industry professionals continue to seek effective and actionable insights, Alliance's GMAP demonstrates how technology and environmental stewardship can work hand in hand for a healthier, more sustainable future.