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

Regulations last checked for updates: Nov 22, 2024

Title 40 - Protection of Environment last revised: Nov 20, 2024

Appendix - Table 4 to Subpart O of Part 63—Standards for Group 1 Room Air Emissions

As required in § 63.362(f), for your collection of Group 1 room air emissions at each facility, you must meet the applicable standard in the following table:

For each . . .	For which . . .	You must . . .	You must comply with the requirement(s) . . .
1. Existing collection of Group 1 room air emissions at a major source facility	a. Not applicable	i. Operate all areas of the facility that contain Group 1 room air emissions with PTE, with all exhaust gas streams being captured and routed to a control system. Also, ii. Continuously reduce EtO emissions by 97 percent ¹	No later than April 5, 2027.
2. Existing collection of Group 1 room air emissions at an area source facility	a. Facility EtO use is at least 40 tpy	i. Operate all areas of the facility that contain Group 1 room air emissions with PTE, with all exhaust gas streams being captured and routed to a control system. ² Also, ii. Continuously reduce EtO emissions by 98 percent ¹ ²	No later than April 6, 2026.
	b. Facility EtO use is less than 40 tpy	i. Operate all areas of the facility that contain Group 1 room air emissions with PTE, with all exhaust gas streams being captured and routed to a control system. Also, ii. Continuously reduce EtO emissions by 80 percent ¹ ³	No later than April 5, 2027.
3. New collection of Group 1 room air emissions at a major source facility	a. Initial startup is on or before April 5, 2024	i. Operate all areas of the facility that contain Group 1 room air emissions with PTE, with all exhaust gas streams being captured and routed to a control system. Also, ii. Continuously reduce EtO emissions by 97 percent ¹	No later than April 5, 2024.
	b. Initial startup is after April 5, 2024	i. Operate all areas of the facility that contain Group 1 room air emissions with PTE, with all exhaust gas streams being captured and routed to a control system. Also, ii. Continuously reduce EtO emissions by 97 percent ¹	Upon startup of the source.
4. New collection of Group 1 room air emissions at an area source facility	a. Initial startup is on or before April 5, 2024, and facility EtO use is at least 40 tpy	i. Operate all areas of the facility that contain Group 1 room air emissions with PTE, with all exhaust gas streams being captured and routed to a control system. ⁴ Also, ii. Continuously reduce EtO emissions by 98 percent ¹ ⁴	No later than April 5, 2024.
	b. Initial startup is on or before April 5, 2024, and facility EtO use is less than 40 tpy	i. Operate all areas of the facility that contain Group 1 room air emissions with PTE, with all exhaust gas streams being captured and routed to a control system. ⁵ Also, ii. Continuously reduce EtO emissions by 80 percent ¹ ⁵	No later than April 5, 2024.
	c. Initial startup is after April 5, 2024, and facility EtO use is at least 40 tpy	i. Operate all areas of the facility that contain Group 1 room air emissions with PTE, with all exhaust gas streams being captured and routed to a control system. ⁴ Also, ii. Continuously reduce EtO emissions by 98 percent ¹ ⁴	Upon startup of the source.
	d. Initial startup is after April 5, 2024, and facility EtO use is less than 40 tpy	i. Operate all areas of the facility that contain Group 1 room air emissions with PTE, with all exhaust gas streams being captured and routed to a control system. ⁵ Also, ii. Continuously reduce EtO emissions by 80 percent ¹ ⁵	Upon startup of the source.

¹ If using CEMS to determine compliance, this standard is based on a rolling 30-operating day average.

² The standard applies if the facility has met or exceeded the specified EtO use within any consecutive 12-month period after April 7, 2025.

³ The standard applies if the facility has used less than 40 tpy of EtO within all consecutive 12-month periods after April 6, 2026.

⁴ The standard applies if the facility is expected to meet or exceed the specified EtO use within one year after startup. Afterwards, the standard applies if the facility has met or exceeded the specified EtO use within any consecutive 12-month period after startup.

⁵ The standard applies if the facility is not expected to meet or exceed 40 tpy of EtO use within one year after startup. Afterwards, the standard applies if the facility has used less than 40 tpy of EtO within all consecutive 12-month periods after startup.

authority: 42 U.S.C. 7401

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