Code of Federal Regulations > Title 40 > Chapter I > Part 63 > Subpart JJJ > Appendix - Table 5 to Subpart JJJ of Part 63—Group 1 Storage Vessels at New Affected Sources Producing the Listed Thermoplastics

Regulations last checked for updates: May 17, 2024

Title 40 - Protection of Environment last revised: May 15, 2024

Appendix - Table 5 to Subpart JJJ of Part 63—Group 1 Storage Vessels at New 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
SAN, continuous ^d	All chemicals	≥2,271	≥0.5 and <0.7
		<151	≥10
		≥151	≥0.7
Nitrile ^c	Acrylonitrile	≥13.25	≥1.8
Polystyrene, continuous processes	All chemicals	≥19.6 and <45.4	≥7.48
		≥45.4 and <109.8	≥0.61
		≥109.8	≥0.53
ABS, continuous mass	Styrene	≥45.43	≥0.078
	All other chemicals	≥38 and <45.43	≥13.1
		≥45.43	≥0.53

^a Vessel capacity and vapor pressure criteria are specific to the listed chemical, to “all chemicals,” or to “all other chemicals,” as indicated.

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

^c The applicability criteria in Table 4 of this subpart shall be used for chemicals not specifically listed in this table (i.e., Table 5).

^d The control level for the first two sets of applicability criteria are specified in 63.1314 as 90% and 98%, respectively. The control level for the third set of applicability criteria is the HON control level of 95%.

[64 FR 11553, Mar. 9, 1999]

authority: 42 U.S.C. 7401

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