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Code of Federal Regulations (Last Updated: October 10, 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 D - Emission Test Equipment Provisions |
| § 90.301 - Applicability. |
| § 90.302 - Definitions. |
| § 90.303 - Symbols, acronyms, abbreviations. |
| § 90.304 - Test equipment overview. |
| § 90.305 - Dynamometer specifications and calibration accuracy. |
| § 90.306 - Dynamometer torque cell calibration. |
| § 90.307 - Engine cooling system. |
| § 90.308 - Lubricating oil and test fuels. |
| § 90.309 - Engine intake air temperature measurement. |
| § 90.310 - Engine intake air humidity measurement. |
| § 90.311 - Test conditions. |
| § 90.312 - Analytical gases. |
| § 90.313 - Analyzers required. |
| § 90.314 - Analyzer accuracy and specifications. |
| § 90.315 - Analyzer initial calibration. |
| § 90.316 - Hydrocarbon analyzer calibration. |
| § 90.317 - Carbon monoxide analyzer calibration. |
| § 90.318 - Oxides of nitrogen analyzer calibration. |
| § 90.319 - NOX converter check. |
| § 90.320 - Carbon dioxide analyzer calibration. |
| § 90.321 - NDIR analyzer calibration. |
| § 90.322 - Calibration of other equipment. |
| § 90.323 - Analyzer bench checks. |
| § 90.324 - Analyzer leakage check. |
| § 90.325 - Analyzer interference checks. |
| § 90.326 - Pre- and post-test analyzer calibration. |
| § 90.327 - Sampling system requirements. |
| § 90.328 - Measurement equipment accuracy/calibration frequency table. |
| § 90.329 - Catalyst thermal stress test. |
| Appendix A to Subpart D of Part 90 - Tables |
| Appendix B to Subpart D of Part 90 - Figures |