For over 45 years, Weston has delivered an array of integrated air emission testing services as a strong national team of professionals seasoned in addressing our clients’ diverse emission testing needs.


Wesley Fritz


Weston has been performing emissions testing services for over 45 years and maintains a staff of over 60 highly experienced professionals dedicated to delivering safe, quality-driven emission testing projects. Since 1990, we have successfully completed over 7,000 emission testing projects valued at $240 million. Our team operates nationally from delivery centers in Auburn, Alabama; West Chester, Pennsylvania; and Houston, Texas.


Our emissions testing services group takes pride in delivering safe, reliable, quality-focused, regulatory-compliant, and cost-effective emission testing projects to clients. We are a go-to provider to the pulp and paper, wood products, power, chemical, petro-chemical/refineries, automotive, cement industries, and a number of other industrial facilities. Weston’s emission testing practices and laboratory operate as a certified Air Emission Testing Body (AETB) under American Society for Testing and Materials International (ASTM) D7036 standards. We have over 25 staff members certified as Qualified Individuals (QI) in accordance with the same standard and as required for 40 CFR Part 75 testing. Our fixed air quality laboratory maintains The National Environmental Laboratory Accreditation Conference (NELAC) Institute (TNI) accreditation through the Louisiana Environmental Laboratory Accreditation Program (LELAP).


Our clients can be confident Weston will both deliver exceptional quality and make safety a top priority during all project efforts. We staff all emission testing projects with experienced and qualified team leaders and members to ensure focus on quality, timely coordination, and responsive communication with plant and representative officials.


Weston is the industry leader in providing measurement of Per- and Polyfluoroalkyl Substances (PFAS) air emissions to clients who need accurate, technically sound, and defensible data as regulatory agencies, attorneys, and community advocacy groups turn their focus toward air exposure pathways. For over 45 years, Weston’s emission testing team has conducted reliable stack emissions sampling for chemical and manufacturing clients in support of their efforts to meet compliance and environmental stewardship goals while maintaining successful business operations. Weston has completed over 30 PFAS emissions testing projects and has developed innovative, state-of-the-art sampling methods for these emerging contaminants, making us the “go to” firm for PFAS emissions testing.


  • Regulatory Compliance Demonstrations
  • Continuous Emissions Monitoring Systems (CEMS) Certification/Relative Accuracy Test Audit (RATA) Testing
  • Mercury 30B Compliance and RATA Testing
  • Comprehensive Performance Tests and Trial Burns
  • Temporary CEMS Services
  • EPA Electronic Reporting Tool (ERT) Submittals
  • Indoor Air Quality consulting and Surveys
  • On-site Analysis for Mercury (Hg), Particulate Matter (PM), SO3/H2S04, VOCs, Hydrochloric Acid (HCL)/Hydrogen Fluoride (HF)
  • Combustion Engine Testing
  • PFAS Air Emissions Testing
  • VOCs Capture and Efficiency Testing
  • Fourier Transform Infrared Spectroscopy (FTIR) Testing
  • Particulate Matter CEMS Certification Testing
  • Speciated Total Reduced Sulfur (TRS) Testing
  • Air Pollution Control Device Performance Testing
  • Complex/Comprehensive Startup Compliance Testing
  • Material Optimization Studies
  • Various Other Emission Testing Applications