subpart_subject: "Field Testing and Portable Emission Measurement Systems"
section_number: "1065.940"
section_subject: "Emission calculations."
cfr_reference: "40 CFR 1065.940"
title_name: "Title 40"
title_subject: "Protection of Environment"
parts_covered: "Part 1060 to End"
revised_date: "Revised as of July 1, 2019"
publication_date: "As of July 1, 2019"
contains_description: "Containing a codification of documents of general applicability and future effect"
publication_info: "Published by the Office of the Federal Register National Archives and Records Administration as a Special Edition of the Federal Register"
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(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.