Stack Testing

CK offers a comprehensive array of source emissions testing services:

  • Continuous emissions monitoring system (CEMS): audits, design, installation, maintenance, and repairs
  • Cylinder gas audit (CGA)
  • Electronic data reporting (EDR)
  • Emissions testing programs
  • NOx budget plans
  • Pollution control performance evaluation: RACT, BACT, & MACT
  • Relative accuracy test audit (RATA)
  • Visible emission / opacity determination

Emissions Monitoring

CK has solutions to all of your CEMS needs. Whether your plant needs someone to perform audit testing, assistance with regular CEMS maintenance, provide refresher training in proper CEMS operations, or you need a new CEMS, CK delivers solutions. CK offers a full range of CEMS services including design and installation, preventive maintenance, auditing and testing, QA/QC, training, and reporting.

  • CEMS Design and Installation
  • CEMS Maintenance
  • CEMS Audit & Testing
    • Cylinder Gas Audit (CGA)
    • Linearity Checks
    • Relative Accuracy Test Audit (RATA)
    • Calibration Error (CE)
  • CEMS QA/QC Plans
  • CEMS Training
  • CEMS Reporting
    • Emission Reports
    • Electronic Data Reporting (EDR)

CEMS Preventative Maintenance

Objectives of preventative maintenance are to reduce downtime, maintain data availability, and provide some training in the day to day operation and maintenance of the system.

During site visits, CK checks daily calibrations, performs all QC activities required by the sites QA/QC Plan, maintains the CEMS Log and documents the preventative maintenance performed.

Written service reports for each scheduled and un-scheduled site visit are prepared by CK and delivered to client at the end of each service.

Ambient Monitoring

CK audits ambient air monitoring systems and performs ambient air test programs to evaluate airborne pollutants emitted from variety of activities:

  • Construction and renovation projects
  • Fugitive emissions
  • Non-point source emissions like quarries, landfills, and wastewater treatment plants

Common pollutants include:

  • Metals like lead, mercury, and cadmium
  • Odorous compounds like methane and hydrogen sulfide
  • Particulate matter (PM) of various sizes
  • Volatile and semi-volatile organic compounds

Test results are presented in a technical report and compared to occupation and residential exposure standards.

Process Gas Testing

CK performs sample collection and laboratory analysis to determine gas composition for a variety of applications and systems. Test results feature NIST traceable standards capable of detecting:

  • Argon (Ar)
  • Carbon dioxide (CO2)
  • Carbon monoxide (CO)
  • Helium (He)
  • Hydrogen (H2)
  • Methane (CH4)
  • Nitrogen (N2)
  • Nitrogen dioxide (NO2)
  • Oxygen (O2)
  • Particulate matter (PM)
  • Total halogenated hydrocarbons
  • Total hydrocarbons (THC)
  • Water content (H2O) or dew point



Medical gases and breathing air evaluates USP, NF, or OEM specifications for grade “D” breathing air, NFPA piping purity, and NFPA medical gas concentration.



For aerospace applications, compressed nitrogen gas is usually used to fill and pressurize aircraft components such as tires and struts. Nitrogen is inert–it will not support fire if released under pressure. Consequently, FAA regulations require most tires contain less than five percent oxygen. Moisture and oxygen can also cause corrosion. Impurities like particles and moisture can impede moving parts and cause imbalances in tires.



Manufacturing process gases can be evaluated to verify supplier specifications and to meet quality assurance requirements. Distribution systems can be evaluated by sampling multiple distribution points. Our independent test will determine how your gas compares with its design specifications.



Fuels can be evaluate for combustion properties and potential emissions pollutants, including landfill gas (LFG) fuel methane content.