Regulations last checked for updates: Oct 31, 2025

Title 40 - Protection of Environment last revised: Sep 30, 2029
All TitlesTitle 40Chapter IPart 63Subpart HHHHHAppendix - Table 11 to Subpart HHHHH 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 11 to Subpart HHHHH 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
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