USA EPA PS4 Explained | Carbon Monoxide CEMS Certification Guide

Master EPA Performance Specification 4 (PS-4) and PS-4A for Carbon Monoxide (CO) Continuous Emission Monitoring Systems. This step-by-step tutorial breaks down the essential certification procedures, calibration limits, and field verification steps required for stationary source compliance. Ideal for plant engineers, stack testers, and professionals preparing for QSTI exams.

In this video, we cover the critical testing specifications outlined by the US EPA:

• Calibration Drift (CD): Must not drift by more than 5% of the span value for 6 out of 7 consecutive test days.

• Relative Accuracy (RA): Meeting the 10% RA limit using EPA Method 10 as the reference method.

• Dual-Range Requirements: Understanding high-scale versus low-scale span values for fluctuating CO emission levels.