Fugitive emissions are unintentional releases (leaks) from sources such as valves, pumps, compressors, pressure-relief valves, sampling connection systems, open-ended lines, and flanges as opposed to point-source emissions from stacks, vents, and flares.

Table 5.24.1 compares the fugitive emissions from these sources in terms of source emissions factors and total source contributions of VOCs. A count of all equipment multiplied by the emission factors estimates the total emissions.

Fugitive emissions do not occur as part of normal plant operations but result from the following:


Wear and tear

Lack of proper maintenance

Operator error

Improper equipment specifications Improper installation Use of inferior technology Externally caused damage

Fugitive emissions can be significantly reduced with the adoption of improved technology, maintenance, and operating procedures.

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