CFR›Title 40›Chapter I›Part 204 ContainsSubpart A; Appendix I; Subpart BCorpusDaily eCFRDisplayed edition2026-04-27Last updated2026-04-27 PART 204—NOISE EMISSION STANDARDS FOR CONSTRUCTION EQUIPMENT Contents A Subpart A—General Provisions Sections 204.1–204.5-3 Appendix I to Part 204 Appendix I to Part 204 B Subpart B—Portable Air Compressors Sections 204.50–204.59 Authority(42 U.S.C. 4905), 86 Stat. 1237.Source41 FR 2172, Jan. 14, 1976, unless otherwise noted. Previous 203 Part 203—Low-Noise-Emission Products Next 205 Part 205—Transportation Equipment Noise Emission Controls