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Code of Federal Regulations (Last Updated: November 8, 2024) |
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Title 40 - Protection of Environment |
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Chapter I - Environmental Protection Agency |
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SubChapter C - Air Programs |
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Part 90 - Control of Emissions from Nonroad Spark-Ignition Engines at or Below 19 Kilowatts |
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Subpart E - Gaseous Exhaust Test Procedures |
| § 90.401 - Applicability. |
| § 90.402 - Definitions. |
| § 90.403 - Symbols, acronyms, and abbreviations. |
| § 90.404 - Test procedure overview. |
| § 90.405 - Recorded information. |
| § 90.406 - Engine parameters to be measured and recorded. |
| § 90.407 - Engine inlet and exhaust systems. |
| § 90.408 - Pre-test procedures. |
| § 90.409 - Engine dynamometer test run. |
| § 90.410 - Engine test cycle. |
| § 90.411 - Post-test analyzer procedures. |
| § 90.412 - Data logging. |
| § 90.413 - Exhaust sample procedure - gaseous components. |
| § 90.414 - Raw gaseous exhaust sampling and analytical system description. |
| § 90.415 - Raw gaseous sampling procedures. |
| § 90.416 - Intake air flow measurement specifications. |
| § 90.417 - Fuel flow measurement specifications. |
| § 90.418 - Data evaluation for gaseous emissions. |
| § 90.419 - Raw emission sampling calculations - gasoline fueled engines. |
| § 90.420 - CVS concept of exhaust gas sampling system. |
| § 90.421 - Dilute gaseous exhaust sampling and analytical system description. |
| § 90.422 - Background sample. |
| § 90.423 - Exhaust gas analytical system; CVS grab sample. |
| § 90.424 - Dilute sampling procedures - CVS calibration. |
| § 90.425 - CVS calibration frequency. |
| § 90.426 - Dilute emission sampling calculations - gasoline fueled engines. |
| § 90.427 - Catalyst thermal stress resistance evaluation. |
| Appendix A to Subpart E of Part 90 - Tables |
| Appendix B to Subpart E of Part 90 - Figures |