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Q652. Are the results of Equations W-11A and W-11B in standard conditions or actual conditions?

A652. Actual conditions. The final results of Equations W-11A and W-11B (average flow rate in cubic feet per hour under subsonic and sonic flow, respectively) are at actual conditions, and must be converted to standard conditions.

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Part 98 generally specifies when a conversion is needed. In this case, that information was not included which could significantly impact the results of W-10A. EPA is considering whether a revision to Part 98 is the most appropriate approach to address this issue.


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Source: Drafted new by EPA Final Review and W Team March 28, 2012.

Approval / Publishing History: Version 1

Expiration: None

Relevant Subparts: W


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