40 CFR § 60.1715
What types of continuous emission monitoring must I perform?
June 9, 2020
To continuously monitor emissions, you must perform four tasks:
(a) Install continuous emission monitoring systems for certain gaseous pollutants.
(b) Make sure your continuous emission monitoring systems are operating correctly.
(c) Make sure you obtain the minimum amount of monitoring data.
(d) Install a continuous opacity monitoring system.