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FAQ > Rule Subparts > Subpart W. Petroleum and Natural Gas Systems > Other - Flaring > Q586. For Equation W-21, Flare Emissions, Do you use "5" for Rj (number of carbon atoms) for hydrocarbons with more than 5 carbons?
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Q585. What does EPA mean by "disposition of recovered gas"?  Why does EPA think this is a required parameter for the software model?


A586. For hydrocarbon constituents with 5 or more carbon atoms, Rj is 5 as defined in equation W-21.


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Source: EPA, Frequently Asked Questions, Petroleum and Natural Gas Systems, July 2011,

Approval / Publishing History: Version 1, Approved and published by M. Eaddy 7/26/2012

Expiration : none

Relevant Subpart: W, Flaring

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