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Section 6 Particulate Matter Controls
Particulate matter (PM) is the general term used for a mixture of solid particles and liquid droplets suspended in air. U.S. EPA defines PM 10 as particle matter having a nominal aerodynamic diameter of 10 micrometer ( µm) or less. PM 2.5 is defined as PM less than or equal to 2.5 µm in aerodynamic diameter. In general, “coarse PM” refers ...
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