Site Feedback

Title 40

Displaying title 40, up to date as of 6/11/2026. Title 40 was last amended 6/11/2026.
eCFR Content

The Code of Federal Regulations (CFR) is the official legal print publication containing the codification of the general and permanent rules published in the Federal Register by the departments and agencies of the Federal Government. The Electronic Code of Federal Regulations (eCFR) is a continuously updated online version of the CFR. It is not an official legal edition of the CFR.

Learn more about the eCFR, its status, and the editorial process.

Table 3 to Subpart JJJ of Part 63—Group 1 Storage Vessels at Existing Affected Sources Producing the Listed Thermoplastics

Thermoplastic Chemical a Vessel capacity (cubic meters) Vapor pressure b (kilopascals)
ASA/AMSAN c styrene/acrylonitrile mixture ≥3.78 ≥0.47
acrylonitrile ≥75.7 ≥1.62
Polystyrene, continuous processes all chemicals <75.7 ≥14.2
≥75.7
≥1.9
Nitrilec acrylonitrile ≥13.25 ≥1.8
a Vessel capacity and vapor pressure criteria are specific to the listed chemical or to “all chemicals,” as indicated.
b Maximum true vapor pressure of total organic HAP at storage temperature.
c The applicability criteria in Table 2 of this subpart shall be used for chemicals not specifically listed in this table (i.e., Table 3).

[64 FR 11553, Mar. 9, 1999]