Your Stack Emissions Testing Needs

From testing to monitoring, emissions inventory development to control equipment evaluation and beyond, GCI (Grace Consulting, Inc.) has the broad range of experience that you need to comply with Clean Air Act regulations and more. Let us help you devise a plan, certify your monitoring system, and determine compliance status and operational efficiency.

Testing Services

We are dedicated to continuous improvement so we can pass on our expertise to clients. We review the processes and procedures used in stack testing projects on a regular basis, so we are always on the cutting edge of what’s working. 

In addition to our technical expertise, our team hones its management skills from our work with private industry, utilities, the governmental sector, and more. Finally, our work with regulations and regulatory agencies helps us deliver the highest quality testing services across industries.

  • ASTM
  • CTM / OTM
  • CARB
  • VOST
Gaseous Monitoring,


  • O₂, CO₂, SO₂, NOx, NO, NO₂, CO, TRS 
  • VOC’s
    • Methane
    • Non-Methane
  • HAPS
  • FTIR: Target Compounds (HCl, CH₂O, NH₃, & more)
  • P60 & P75 RATA
Specialty Services
  • A2LA Accredited Testing Body
  • Boiler/Turbine Tuning
  • Controlled Condensate SO₃
  • FTIR RATA (HCl, NH₃)
  • Mercury RATAs
  • On-site Analysis
  • Particulate Size Distribution
  • Precision Flow for Part 75 RATAs
  • PS11 RCA, RRA
  • VOCs-Enclosure Testing (Method 204) &
    Method 21
Laboratory Services
  • Precision Flow

    Precision Flow ©

    Precision Flow is a multi-probe electronic flow measurement system designed for speed, accuracy and affordability and has been the method of choice for the nation’s largest utilities.

  • Smoke Stacks in Indiana


    Fourier-transform infrared spectroscopy (FTIR) is a procedure that collects an infrared spectrum of absorption or emission of a solid, a liquid, or a gas.

  • Mercury Testing Services

    Mercury Testing Services

    This industry’s rapidly developing needs require agile, specialized Mercury sampling services. Learn more about our Mercury testing services, including RATAs, speciated testing and onsite capabilities!

  • Mobile Labs

    Mobile Labs

    GCI currently operates a large fleet of complete source emissions sampling mobile monitoring laboratory trailers equipped with the required apparatus to perform emissions sampling on a continuous basis. 

  • Analytical Services

    Analytical Services

    GCI maintains a professional laboratory in each of its four offices and qualified staff to perform in-house analytical services. The laboratory staff strives to provide highly accurate and timely results to our clients. 

Our testing services include:

  • Automotive, Aerospace
  • Asphalt
  • Brick and Clay Production, Mining, Ceramics
  • Cement Manufacturing
  • Chemical and Fertilizer Manufacturing
  • Ethanol
  • Food Production
  • Generators
  • Glass/Fiberglass
  • Government
  • Iron & Steel
  • Electroplating and Surface Coatings
  • Municipalities
  • Pharmaceutical
  • Electric Power Generation
  • Polymers, Coatings, Paint, Foam productions
  • Pulp, Paper and Forestry Products
  • Refineries, Oil and Gas Transmission
  • Sterilization Facilities
  • Utilities
  • Waste to Energy (landfills, farms, municipal)
  • Waste Management
  • Air Heaters
  • Baghouses
  • Blast Furnaces
  • Boilers
  • Combustion Turbines
  • Catalytic Oxidizers
  • Capture Systems/Hoods
  • DRI & Scrap Units
  • Electric Arc Furnaces
  • Engines, Stationary Engines
  • Filters and Mist Eliminators
  • Flares
  • Fuels:
    • Coal
    • Combination Fuels
    • Natural Gas
    • Oil
    • Refuse/Waste
    • Sludge
    • Wood/Bark
  • Generators
  • Incinerators
  • Kilns
  • Precipitators
  • Paper Machines
  • SCR’s, SNCR’s
  • Scrubbers
  • Smokestacks
  • Sprayers
  • Temporary, Permanent and Building enclosures
  • Thermal Oxidizers
Types of Testing
  • Compliance Testing
    • NSPS (40CFR60), NESHAP (40CFR63), and State Regulatory Compliance
      • Air Toxins Emissions, Control
      • Criteria Pollutants Emissions
      • Reference Method Emissions
    • Continuous Emissions Monitoring Systems, 40 CFR Part 60 Performance Specifications and QA Procedures, and 40 CFR Part 75 Acid Rain Program
      • Relative Accuracy Test Audits (RATA)
      • Cylinder Gas Audits (CGA)
      • Bias Testing
      • Drift Testing
      • Relative Accuracy Audit (RAA)
      • CEMS Preventative Maintenance & QA/QC
    • Compliance Assurance Monitoring
      • Fly Ash Resistivity
      • Acid Dew Point
      • Condensates
    • Investigative, Diagnostic, Engineering, or Performance Guarantees
      • Control Efficiency
      • Combustion Efficiency
      • Tuning
      • Forensic Analysis
      • Stratification Analysis


    Ohio • 510 Dickson Street, Wellington, OH 44090
    North Carolina • 1855 Sipe Road, Conover, NC 28613
    Indiana • 684 Tower Road, Plainfield, IN 46168


    510 Dickson Street, Wellington, OH 44090
    North Carolina
    1855 Sipe Road, Conover, NC 28613
    684 Tower Road, Plainfield, IN 46168




    © 2024 Grace Consulting Inc. All rights reserved.

    Request a Proposal

    Please provide the following information and a member of our team will be in touch with you shortly.