Process Fugitive Sources

Although typically more numerous than process point sources, process fugitive sources can also be individually defined for a chemical plant. Inadvertent emissions from or through pumps, valves, compressors, access ports, storage tank vents, and feed or discharge openings to a process classify such units or equipment as process fugitive sources. Vent fans from rooms or enclosures containing an emissions source can also be classified this way (U.S. EPA 1991). Once process fugitive emissions are captured by hooding, enclosures, or closed-vent systems, they can often be controlled by add-on devices used for process point sources.

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