US EPA Method 22

Method 22

Visual Determination of Fugitive Emissions from Material Sources and Smoke Emissions from Flares

This method is applicable for the determination of the frequency of fugitive emissions from stationary sources, only as specified in an applicable subpart of the regulations. This method is also applicable for the determination of the frequency of visible smoke emissions from flares. This method is used also to determine visible smoke emissions from flares used for combustion of waste process materials.