EPA Method 20
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EPA Method 20:
DETERMINATION OF NITROGEN OXIDES, SULFUR DIOXIDE, AND DILUENT EMISSIONS FROM STATIONARY GAS TURBINES
In this method, NOx, O2 (or CO2), and SO2 are measured using the following methods found in appendix A to this part: (a) Method 1-Sample and Velocity Traverses for Stationary Sources. (b) Method 3A-Determination of Oxygen and Carbon Dioxide Emissions From Stationary Sources (Instrumental Analyzer Procedure). (c) Method 6C-Determination of Sulfur Dioxide Emissions From Stationary Sources (Instrumental Analyzer Procedure). (d) Method 7E-Determination of Nitrogen Oxides Emissions From Stationary Sources (Instrumental Analyzer Procedure).
The use of Method 20 may be required by specific New Source Performance Standards, Clean Air Marketing rules, and State Implementation Plans and permits where measuring SO2, NOx, CO2, and/or O2 concentrations in stationary gas turbines emissions are required. Other regulations may also require its use.
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