Regulations last checked for updates: Jul 04, 2025

Title 40 - Protection of Environment last revised: Nov 04, 2025
All TitlesTitle 40Chapter IPart 63Subpart OOOOAppendix - Table 6 to Subpart OOOO of Part 63—List of Hazardous Air Pollutants That Must Be Counted Toward Total Organic HAP Content if Present at 0.1 Percent or More by Mass
Collapse to view onlyAppendix - Table 6 to Subpart OOOO of Part 63—List of Hazardous Air Pollutants That Must Be Counted Toward Total Organic HAP Content if Present at 0.1 Percent or More by Mass
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authority: 42 U.S.C. 7401
source: 57 FR 61992, Dec. 29, 1992, unless otherwise noted.
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