Regulations last checked for updates: Nov 02, 2025

Title 40 - Protection of Environment last revised: Sep 02, 2029
All TitlesTitle 40Chapter IPart 63Subpart VVVVVVAppendix - Table 1 to Subpart VVVVVV of Part 63—Hazardous Air Pollutants Used To Determine Applicability of Chemical Manufacturing Operations
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Appendix - Table 1 to Subpart VVVVVV of Part 63—Hazardous Air Pollutants Used To Determine Applicability of Chemical Manufacturing Operations

As required in § 63.11494(a), chemical manufacturing operations that process, use, or produce the HAP shown in the following table are subject to subpart VVVVVV.

Type of HAP Chemical name CAS No.
1. Organic compoundsa. 1,3-butadiene106990
b. 1,3-dichloropropene542756
c. Acetaldehyde75070
d. Chloroform67663
e. Ethylene dichloride107062
f. Hexachlorobenzene118741
g. Methylene chloride75092
h. Quinoline91225
2. Metal compoundsa. Arsenic compounds
b. Cadmium compounds
c. Chromium compounds
d. Lead compounds
e. Manganese compounds
f. Nickel compounds
3. Othersa. Hydrazine302012
authority: 42 U.S.C. 7401
source: 57 FR 61992, Dec. 29, 1992, unless otherwise noted.
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