{"data":{"id":"us/40-cfr-1065.940","jurisdiction":"us","citation":"40 CFR 1065.940","heading":"Emission calculations.","body":"(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.\n(b) You may use a fixed molar mass for the diluted exhaust mixture for field testing. Determine this fixed value by engineering analysis.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER U—AIR POLLUTION CONTROLS","PART 1065—ENGINE-TESTING PROCEDURES","Subpart J—Field Testing and Portable Emission Measurement Systems"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"be4dd645e027e03921a73a1d43339061d5decacab11b3e0c3a10507431d1821e","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-1065.935","next":"us/40-cfr-1065.1001"},"notice":"GroundRules: Original legal text. Not legal advice."}