CEMS / PEMS Certification
DeNovo provides services for both Continuous Emissions Monitoring Systems (CEMS) and Predictive Emission Monitoring Systems (PEMS) in Stationary Sources, with a focus on CEMS Certification Testing. The DeNovo personnel have performed hundreds of CEMS related projects, and DeNovo’s mobile labs are equipped with the necessary instrumentation to complete Relative Accuracy Test Audits (RATA) on a variety of CEMS in congruence with the following EPA Performance Specifications (PS):
PS 2 – Specifications and Test Procedures for SO2 and NOX Continuous Emission Monitoring Systems in Stationary Sources
PS 3 – Specifications and Test Procedures for O2 and CO2 Continuous Emission Monitoring Systems in Stationary Sources
PS 4 – Specifications and Test Procedures for Carbon Monoxide (CO) Continuous Emission Monitoring Systems in Stationary Sources
PS 5 – Specifications and Test Procedures for TRS Continuous Emission Monitoring Systems in Stationary Sources
PS 7 – Specifications and Test Procedures for Hydrogen Sulfide (H2S) Continuous Emission Monitoring Systems in Stationary Sources
PS 8 – Performance Specifications for Volatile Organic Compound (VOC) Continuous Emission Monitoring Systems in Stationary Sources
PS 9 – Specifications and Test Procedures for Gas Chromatographic (GC) Continuous Emission Monitoring Systems in Stationary Sources
In addition to the RATA testing offered, DeNovo also provides other CEMS Services including:
- Complete Maintenance Programs
- Absolute Calibration Audits (ACA)
- CEMS Performance Pre-Test
- Calibration Gas Audits (CGA)

DeNovo Global Technologies, Inc.
17902 East Strack Drive
Spring, Texas 77379