Code of Federal Regulations > Title 40 > Chapter I > Part 63 > Subpart U > Appendix - Table 4 to Subpart U of Part 63

Regulations last checked for updates: Jan 30, 2025

Title 40 - Protection of Environment last revised: Nov 08, 2025

Appendix - Table 4 to Subpart U of Part 63—Group 1 Storage Vessels at New Sources

Vessel capacity (cubic meters)	Vapor Pressure ^a (kilopascals)
38 ≤capacity <151	≥13.1
151 ≤capacity	≥0.7

^a Maximum true vapor pressure of total organic HAP at storage temperature.

authority: 42 U.S.C. 7401

source: 57 FR 61992, Dec. 29, 1992, unless otherwise noted.