Discussion
Fugitive emissions are those that
Answer: B
Correct answer: Escape other than through a stack
Fugitive emissions escape from equipment and operations rather than passing through a stack or vent - leaking valves, flanges and pump seals, evaporation from open tanks and lagoons, dust raised from stockpiles and haul roads, and losses during loading.
They are difficult to quantify because there is no single flow to measure, so they are estimated from leak surveys and emission factors rather than from stack monitoring. In refineries and chemical plants they can rival or exceed the stack emissions of volatile organic compounds.
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