• Air Quality Experts Since 1980

CEMS / COMS Services

Continuous Opacity Monitoring

Bison has a crew of CEMS experts, capable of helping your facility with many aspects of CEMS and COMS operations.

CEMS Services

  • Cylinder Gas Audits (CGAs) – required quarterly
  • Relative Accuracy Test Audits (RATAs) – required annually
  • Troubleshooting
  • Data QA
  • Data Reporting
    • Excess Emissions Reports (EERs) - Quarterly or Semi-annual
    • Acid Rain (Part 75) Data Reporting to ECMPS
  • Monitoring Plans
  • Operation and Maintenance Plans
  • Initial Certification or Re-Certifications under Performance Specifications of 40 CFR 60 (NSPS)
  • Temporary Replacement or Backup Analyzer Systems
Continuous Opacity Monitoring

Why Use Bison

  • If your staff does not have the time
  • If your staff does not have the technical skills
  • You want an independent look at your CEMS performance

What Bison can supply

  • Trained and experienced audit personnel
  • Gas cylinders and other gas delivery equipment, if necessary
  • Quick and easy scheduling
  • A timely and complete written report

CEMS Parameters We Can Help With

  • Sulfur Dioxide (SO₂)
  • Oxides of Nitrogen (NOₓ)
  • Oxygen (O₂)
  • Carbon Dioxide (CO₂)
  • Carbon Monoxide (CO)
  • Total Reduced Sulfur (TRS)
  • Hydrogen Sulfide (H₂S)
  • Volatile Organic Compounds (VOC) via traditional analyzers or FTIR
  • Total Hydrocarbons (THC)
  • Hydrochloric Acid (HCl)
  • Ethylene Oxide (ETO)
  • Mercury Analyzer and Trap Systems
  • Flowrate
  • Temperature
  • Pressure
  • Moisture

COMS Services

  • Opacity Observations (Method 9 or 22)
  • Quarterly Opacity Audits
  • Off-Stack Zero Calibrations
  • Troubleshooting
  • Initial Certification or Re-Certifications under Performance Specifications of 40 CFR 60

If you operate a continuous opacity monitoring system (COMS), and you are subject to either:

  1. New Source Performance Standard (NSPS) subpart, or
  2. National Emissions Standard for Hazardous Air Pollutants (NESHAPS) subpart

Then you need to perform quarterly COMS filter audits.

You also need to perform an annual or three-year off-stack zero audit and re-calibration.

  • NSPS: Follows EPA Procedure 3 in 40 CFR 60, Appendix F – one or three-year off-stack audit/re-cal.
  • NESHAPS: Does not follow Procedure 3 – follows procedures in specific Subparts. Requires one-year off-stack audit/re-cal.

Useful Links

CEMS

COMS