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Q146. Many facilities use mass or volumetric flow meters to measure gaseous streams. Please confirm whether it is acceptable to use a mass flow meter to determine the volumetric flow rate of gaseous streams under Subpart C or the GHG Reporting Rule.

A146.  Fuel flow meters that measure mass flow rates may be used, provided that the fuel density is used to convert the readings to volumetric flow rates. (See §98.33(a)(3)(iv).)

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