ENV-11-36 Source Testing Methods for Particulate Matter: A Comparative Review of Measurement Methods

Description:

Particulate Matter (PM) is defined as a mixture of solid particles and liquid droplets in air. PM exists in a variety of sizes as ultra-fine particles (10 to 500 nanometers), fine particles (ranging from 1 micron to 2.5 microns) and coarse particulate matter (2.5 microns to 10 microns). PM less than 2.5 microns (PM2.5) are expected to mostly form in the atmosphere due to secondary processes, while coarse PM less than 10 microns in size (PM10) occur from primary emissions. PM10 and PM2.5 emissions, as defined by US EPA, include filterable and condensable emissions.