The US Environmental Protection Agency (US EPA) has proposed amendments to methods for measurement of filterable fine particulate (Method 201A) and measurement of condensable particulate matter emissions from stationary sources (Method 202). The proposed amendments to Method 201A would add a particle-sizing device to allow for sampling of particulate matter (PM) with mean aerodynamic diameters less than or equal to 2.5 micrometers (PM2.5 or fine PM). The proposed amendments to Method 202 would revise the sample collection and recovery procedures of the method to reduce the formation of reaction artifacts that could lead to inaccurate measurements of condensable particulate matter (CPM).
Preamble to Methods 201A and 202. (pdf, 54pp., 345kB)- Method 201A – Method for Measurement of PM10 and PM2.5 Emissions – Proposal. (pdf, 77pp., 1003kB)
- Method 202 – Method for Measurement of Condensable Particulate Matter – Proposal. (pdf, 46pp., 509kB)