§ 1065.659 Removed water correction.

(a) If you remove water upstream of a concentration measurement, x, correct for the removed water. Perform this correction based on the amount of water at the concentration measurement, x_{H2O[emission]meas}, and at the flow meter, x_H2Oexh, whose flow is used to determine the mass emission rate or total mass over a test interval. For continuous analyzers downstream of a sample dryer for transient and ramped-modal cycles, you must apply this correction on a continuous basis over the test interval, even if you use one of the options in § 1065.145(e)(2) that results in a constant value for x_{H2O[emission]meas} because x_H2Oexh varies over the test interval. For batch analyzers, determine the flow-weighted average based on the continuous x_H2Oexh values determined as described in paragraph (c) of this section. For batch analyzers, you may determine the flow-weighted average x_H2Oexh based on a single value of x_H2Oexh determined as described in paragraphs (c)(2) and (3) of this section, using flow-weighted average or batch concentration inputs.