40 CFR Appendix Table 3 to Subpart PPP of Part 63 - Group 1 Storage Vessels at Existing and New Affected Sources

Table 3 to Subpart PPP of Part 63—Group 1 Storage Vessels at Existing and New Affected Sources
Vessel capacity
(cubic meters) 		Vapor pressure a
(kilopascals)
75 ≤ capacity <151 b b ≥13.1
38 ≤ capacity <151 c c ≥6.9
capacity ≥151 ≥5.2

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

b Beginning no later than the compliance dates specified in § 63.1422(h), these vessel capacity and vapor pressure criteria no longer apply.

c Beginning no later than the compliance dates specified in § 63.1422(h), these vessel capacity and vapor pressure criteria apply.

[91 FR 13185, Mar. 18, 2026]