40 CFR § 1065.940
Emission calculations
June 9, 2020
(a) Perform emission calculations as described in §1065.650 to calculate brake-specific emissions for each test interval using any applicable information and instructions in the standard-setting part.
(b) You may use a fixed molar mass for the diluted exhaust mixture for field testing. Determine this fixed value by engineering analysis.
[75 FR 68467, Nov. 8, 2010]