§63.2240. What are the compliance options and operating requirements and how must I meet them? — Inbound Citations

(c) If you have a dry rotary dryer, you may choose to designate your dry rotary dryer as a green rotary dryer and meet the more stringent compliance options and operating requirements in § 63.2240 for green rotary dryers instead of the work practices for dry rotary dryers. If you have a hardwood veneer dryer or veneer redryer, you may choose to designate your hardwood veneer dryer or veneer redryer as a softwood veneer dryer and meet the more stringent compliance options and operating requirements in § 63.2240 for softwood veneer dryer heated zones instead of the work practices for hardwood veneer dryers or veneer redryers.

(a) You must demonstrate continuous compliance with the compliance options, operating requirements, and work practice requirements in §§ 63.2240 and 63.2241 that apply to you according to the methods specified in Tables 7 and 8 to this subpart.

(12) For any failure to meet a compliance option in § 63.2240, including the compliance options in table 1A through 1E to this subpart, provide an estimate of the quantity of each regulated pollutant emitted over any emission limit, and a description of the method used to estimate the emissions.

(A) For any failure to meet a compliance option in § 63.2240, including the compliance options in tables 1A through 1E to this subpart, record an estimate of the quantity of each regulated pollutant emitted over any emission limit and a description of the method used to estimate the emissions.

(1) Approval of alternatives to the compliance options, operating requirements, and work practice requirements in §§ 63.2240 and 63.2241 as specified in § 63.6(g). For the purposes of delegation authority under 40 CFR part 63, subpart E, “compliance options” represent “emission limits”; “operating requirements” represent “operating limits”; and “work practice requirements” represent “work practice standards.”

(3) The compliance options, operating requirements, and work practice requirements that became effective on July 6, 2026, include the compliance options and operating requirements in § 63.2240(d) and (e) and tables 2 (rows 6 to 12), 1C, 1D, 1E, 4 (rows 12 to 19), 5 (rows 9 to 12), and 7 (rows 8 to 14) to this subpart; and the work practice requirements § 63.2241(d) through (g) and tables 3 (rows 9 to 14), 6 (rows 9 to 14), 8 (rows 9 to 17) and 11 to this subpart.

(d) After July 6, 2026, you must comply with the compliance options in tables 1C through 1E to this subpart and associated operating limits in table 2 to this subpart as specified in paragraphs (d)(1) through (6) of this section.

(1) Process units at an affected source that commenced construction or reconstruction on or before May 18, 2023, must comply with the compliance options in table 1C to this subpart on and after July 6, 2029.

(2) Process units at an affected source that commenced construction or reconstruction after May 18, 2023, must comply with the compliance options in table 1C to this subpart beginning on July 6, 2026, or upon initial startup, whichever is later.

(3) Direct-wood fired PCWP dryers at an affected source that commenced construction or reconstruction on or before May 18, 2023, must comply with the compliance options in table 1D to this subpart on and after July 6, 2029. In addition to the limits in table 1D to this subpart, direct wood-fired green rotary dryers that commenced construction or reconstruction on or before May 18, 2023, must limit emissions of dioxins and furans toxic equivalency (TEQ) to no more than 1.3E-09 pounds per oven dried ton (lb/ODT) or 1.7E-01 nanogram per dry standards cubic meter (ng/dscm) on and after July 6, 2029.

(4) Direct-wood fired PCWP dryers at an affected source that commenced construction or reconstruction after May 18, 2023, must comply with the compliance options in table 1E to this subpart beginning on July 6, 2026, or upon initial startup, whichever is later. In addition to the limits in table 1E to this subpart, direct wood-fired green rotary dryers that commenced construction or reconstruction after May 18, 2023, must limit emissions of dioxins and furans TEQ to no more than 4.4E-10 lb/ODT or 3.7E-02 ng/dscm on and after July 6, 2029.

(5) Mixed PCWP process streams (defined in § 63.2292) complying with the compliance options for add-on control systems in table 1B to this subpart according to paragraph (b) of this section before July 6, 2026, must continue to comply with the compliance options in table 1B to this subpart after July 6, 2026.

(6) Affected facilities may choose to comply with the add-on control system compliance options in table 1B to this subpart (and associated operating limits in table 2 to this subpart) instead of the compliance options in table 1C to this subpart for fiberboard mat dryer heated zones, press predryers, post-dryer atmospheric refiners, or multipurpose atmospheric refiners.

(d) After July 6, 2026, you must comply with the compliance options in tables 1C through 1E to this subpart and associated operating limits in table 2 to this subpart as specified in paragraphs (d)(1) through (6) of this section.

(1) Process units at an affected source that commenced construction or reconstruction on or before May 18, 2023, must comply with the compliance options in table 1C to this subpart on and after July 6, 2029.

(2) Process units at an affected source that commenced construction or reconstruction after May 18, 2023, must comply with the compliance options in table 1C to this subpart beginning on July 6, 2026, or upon initial startup, whichever is later.

(3) Direct-wood fired PCWP dryers at an affected source that commenced construction or reconstruction on or before May 18, 2023, must comply with the compliance options in table 1D to this subpart on and after July 6, 2029. In addition to the limits in table 1D to this subpart, direct wood-fired green rotary dryers that commenced construction or reconstruction on or before May 18, 2023, must limit emissions of dioxins and furans toxic equivalency (TEQ) to no more than 1.3E-09 pounds per oven dried ton (lb/ODT) or 1.7E-01 nanogram per dry standards cubic meter (ng/dscm) on and after July 6, 2029.

(4) Direct-wood fired PCWP dryers at an affected source that commenced construction or reconstruction after May 18, 2023, must comply with the compliance options in table 1E to this subpart beginning on July 6, 2026, or upon initial startup, whichever is later. In addition to the limits in table 1E to this subpart, direct wood-fired green rotary dryers that commenced construction or reconstruction after May 18, 2023, must limit emissions of dioxins and furans TEQ to no more than 4.4E-10 lb/ODT or 3.7E-02 ng/dscm on and after July 6, 2029.

(5) Mixed PCWP process streams (defined in § 63.2292) complying with the compliance options for add-on control systems in table 1B to this subpart according to paragraph (b) of this section before July 6, 2026, must continue to comply with the compliance options in table 1B to this subpart after July 6, 2026.

(6) Affected facilities may choose to comply with the add-on control system compliance options in table 1B to this subpart (and associated operating limits in table 2 to this subpart) instead of the compliance options in table 1C to this subpart for fiberboard mat dryer heated zones, press predryers, post-dryer atmospheric refiners, or multipurpose atmospheric refiners.

(3) Sampling sites must be located at the outlet of the control device (defined in § 63.2292), if a control device is used, and prior to any releases to the atmosphere to demonstrate compliance with the compliance options in table 1C, 1D, or 1E to this subpart and for compliance with the dioxin and furan limits in § 63.2240(d)(2) and (3).

(d) After July 6, 2026, you must comply with the compliance options in tables 1C through 1E to this subpart and associated operating limits in table 2 to this subpart as specified in paragraphs (d)(1) through (6) of this section.

(1) Process units at an affected source that commenced construction or reconstruction on or before May 18, 2023, must comply with the compliance options in table 1C to this subpart on and after July 6, 2029.

(2) Process units at an affected source that commenced construction or reconstruction after May 18, 2023, must comply with the compliance options in table 1C to this subpart beginning on July 6, 2026, or upon initial startup, whichever is later.

(3) Direct-wood fired PCWP dryers at an affected source that commenced construction or reconstruction on or before May 18, 2023, must comply with the compliance options in table 1D to this subpart on and after July 6, 2029. In addition to the limits in table 1D to this subpart, direct wood-fired green rotary dryers that commenced construction or reconstruction on or before May 18, 2023, must limit emissions of dioxins and furans toxic equivalency (TEQ) to no more than 1.3E-09 pounds per oven dried ton (lb/ODT) or 1.7E-01 nanogram per dry standards cubic meter (ng/dscm) on and after July 6, 2029.

(4) Direct-wood fired PCWP dryers at an affected source that commenced construction or reconstruction after May 18, 2023, must comply with the compliance options in table 1E to this subpart beginning on July 6, 2026, or upon initial startup, whichever is later. In addition to the limits in table 1E to this subpart, direct wood-fired green rotary dryers that commenced construction or reconstruction after May 18, 2023, must limit emissions of dioxins and furans TEQ to no more than 4.4E-10 lb/ODT or 3.7E-02 ng/dscm on and after July 6, 2029.

(5) Mixed PCWP process streams (defined in § 63.2292) complying with the compliance options for add-on control systems in table 1B to this subpart according to paragraph (b) of this section before July 6, 2026, must continue to comply with the compliance options in table 1B to this subpart after July 6, 2026.

(6) Affected facilities may choose to comply with the add-on control system compliance options in table 1B to this subpart (and associated operating limits in table 2 to this subpart) instead of the compliance options in table 1C to this subpart for fiberboard mat dryer heated zones, press predryers, post-dryer atmospheric refiners, or multipurpose atmospheric refiners.

(3) Sampling sites must be located at the outlet of the control device (defined in § 63.2292), if a control device is used, and prior to any releases to the atmosphere to demonstrate compliance with the compliance options in table 1C, 1D, or 1E to this subpart and for compliance with the dioxin and furan limits in § 63.2240(d)(2) and (3).

(d) After July 6, 2026, you must comply with the compliance options in tables 1C through 1E to this subpart and associated operating limits in table 2 to this subpart as specified in paragraphs (d)(1) through (6) of this section.

(1) Process units at an affected source that commenced construction or reconstruction on or before May 18, 2023, must comply with the compliance options in table 1C to this subpart on and after July 6, 2029.

(2) Process units at an affected source that commenced construction or reconstruction after May 18, 2023, must comply with the compliance options in table 1C to this subpart beginning on July 6, 2026, or upon initial startup, whichever is later.

(3) Direct-wood fired PCWP dryers at an affected source that commenced construction or reconstruction on or before May 18, 2023, must comply with the compliance options in table 1D to this subpart on and after July 6, 2029. In addition to the limits in table 1D to this subpart, direct wood-fired green rotary dryers that commenced construction or reconstruction on or before May 18, 2023, must limit emissions of dioxins and furans toxic equivalency (TEQ) to no more than 1.3E-09 pounds per oven dried ton (lb/ODT) or 1.7E-01 nanogram per dry standards cubic meter (ng/dscm) on and after July 6, 2029.

(4) Direct-wood fired PCWP dryers at an affected source that commenced construction or reconstruction after May 18, 2023, must comply with the compliance options in table 1E to this subpart beginning on July 6, 2026, or upon initial startup, whichever is later. In addition to the limits in table 1E to this subpart, direct wood-fired green rotary dryers that commenced construction or reconstruction after May 18, 2023, must limit emissions of dioxins and furans TEQ to no more than 4.4E-10 lb/ODT or 3.7E-02 ng/dscm on and after July 6, 2029.

(5) Mixed PCWP process streams (defined in § 63.2292) complying with the compliance options for add-on control systems in table 1B to this subpart according to paragraph (b) of this section before July 6, 2026, must continue to comply with the compliance options in table 1B to this subpart after July 6, 2026.

(6) Affected facilities may choose to comply with the add-on control system compliance options in table 1B to this subpart (and associated operating limits in table 2 to this subpart) instead of the compliance options in table 1C to this subpart for fiberboard mat dryer heated zones, press predryers, post-dryer atmospheric refiners, or multipurpose atmospheric refiners.

(3) Nondetect data must be treated as the method detection limit when showing compliance with § 63.2240(d)(3) or (4) and the compliance options in table 1C, 1D, or 1E to this subpart. When determining 2,3,7,8-Tetrachlorodibenzo-p-dioxin toxicity equivalency (TEQ), the value of zero may be used for nondetect results.

(2) If construction or reconstruction of your affected source is commenced on or before May 18, 2023, you must comply with the compliance options, operating requirements, and work practice requirements listed in paragraph (e)(3) of this section beginning on July 6, 2029, except as otherwise specified for mixed PCWP process streams in § 63.2240(d)(5).

(d) After July 6, 2026, you must comply with the compliance options in tables 1C through 1E to this subpart and associated operating limits in table 2 to this subpart as specified in paragraphs (d)(1) through (6) of this section.

(1) Process units at an affected source that commenced construction or reconstruction on or before May 18, 2023, must comply with the compliance options in table 1C to this subpart on and after July 6, 2029.

(2) Process units at an affected source that commenced construction or reconstruction after May 18, 2023, must comply with the compliance options in table 1C to this subpart beginning on July 6, 2026, or upon initial startup, whichever is later.

(3) Direct-wood fired PCWP dryers at an affected source that commenced construction or reconstruction on or before May 18, 2023, must comply with the compliance options in table 1D to this subpart on and after July 6, 2029. In addition to the limits in table 1D to this subpart, direct wood-fired green rotary dryers that commenced construction or reconstruction on or before May 18, 2023, must limit emissions of dioxins and furans toxic equivalency (TEQ) to no more than 1.3E-09 pounds per oven dried ton (lb/ODT) or 1.7E-01 nanogram per dry standards cubic meter (ng/dscm) on and after July 6, 2029.

(4) Direct-wood fired PCWP dryers at an affected source that commenced construction or reconstruction after May 18, 2023, must comply with the compliance options in table 1E to this subpart beginning on July 6, 2026, or upon initial startup, whichever is later. In addition to the limits in table 1E to this subpart, direct wood-fired green rotary dryers that commenced construction or reconstruction after May 18, 2023, must limit emissions of dioxins and furans TEQ to no more than 4.4E-10 lb/ODT or 3.7E-02 ng/dscm on and after July 6, 2029.

(5) Mixed PCWP process streams (defined in § 63.2292) complying with the compliance options for add-on control systems in table 1B to this subpart according to paragraph (b) of this section before July 6, 2026, must continue to comply with the compliance options in table 1B to this subpart after July 6, 2026.

(6) Affected facilities may choose to comply with the add-on control system compliance options in table 1B to this subpart (and associated operating limits in table 2 to this subpart) instead of the compliance options in table 1C to this subpart for fiberboard mat dryer heated zones, press predryers, post-dryer atmospheric refiners, or multipurpose atmospheric refiners.

(d) After July 6, 2026, you must comply with the compliance options in tables 1C through 1E to this subpart and associated operating limits in table 2 to this subpart as specified in paragraphs (d)(1) through (6) of this section.

(1) Process units at an affected source that commenced construction or reconstruction on or before May 18, 2023, must comply with the compliance options in table 1C to this subpart on and after July 6, 2029.

(2) Process units at an affected source that commenced construction or reconstruction after May 18, 2023, must comply with the compliance options in table 1C to this subpart beginning on July 6, 2026, or upon initial startup, whichever is later.

(3) Direct-wood fired PCWP dryers at an affected source that commenced construction or reconstruction on or before May 18, 2023, must comply with the compliance options in table 1D to this subpart on and after July 6, 2029. In addition to the limits in table 1D to this subpart, direct wood-fired green rotary dryers that commenced construction or reconstruction on or before May 18, 2023, must limit emissions of dioxins and furans toxic equivalency (TEQ) to no more than 1.3E-09 pounds per oven dried ton (lb/ODT) or 1.7E-01 nanogram per dry standards cubic meter (ng/dscm) on and after July 6, 2029.

(4) Direct-wood fired PCWP dryers at an affected source that commenced construction or reconstruction after May 18, 2023, must comply with the compliance options in table 1E to this subpart beginning on July 6, 2026, or upon initial startup, whichever is later. In addition to the limits in table 1E to this subpart, direct wood-fired green rotary dryers that commenced construction or reconstruction after May 18, 2023, must limit emissions of dioxins and furans TEQ to no more than 4.4E-10 lb/ODT or 3.7E-02 ng/dscm on and after July 6, 2029.

(5) Mixed PCWP process streams (defined in § 63.2292) complying with the compliance options for add-on control systems in table 1B to this subpart according to paragraph (b) of this section before July 6, 2026, must continue to comply with the compliance options in table 1B to this subpart after July 6, 2026.

(6) Affected facilities may choose to comply with the add-on control system compliance options in table 1B to this subpart (and associated operating limits in table 2 to this subpart) instead of the compliance options in table 1C to this subpart for fiberboard mat dryer heated zones, press predryers, post-dryer atmospheric refiners, or multipurpose atmospheric refiners.

(3) The compliance options, operating requirements, and work practice requirements that became effective on July 6, 2026, include the compliance options and operating requirements in § 63.2240(d) and (e) and tables 2 (rows 6 to 12), 1C, 1D, 1E, 4 (rows 12 to 19), 5 (rows 9 to 12), and 7 (rows 8 to 14) to this subpart; and the work practice requirements § 63.2241(d) through (g) and tables 3 (rows 9 to 14), 6 (rows 9 to 14), 8 (rows 9 to 17) and 11 to this subpart.

(6) The applicable standard during each of the operating conditions specified in paragraphs (f)(2) through (4) of this section are the work practice requirements in table 3 to this subpart for safety-related shutdowns (row 6), pressurized refiner startup and shutdown (row 7), and direct-fired softwood veneer dryers undergoing startup or shutdown of gas-fired burners (row 8). The otherwise applicable compliance options, operating requirements, and work practice requirements (in rows 1 through 5 of table 3 to this subpart) do not apply during the operating conditions specified in paragraphs (f)(2) through (4) of this section, with the exception of the operating requirement in § 63.2240(e) which applies at all times.

(4) Instances of safety-related shutdown, pressurized refiner startup and shutdown, and startup and shutdown of direct-fired softwood veneer dryer gas-fired burners subject to the work practice requirements in table 3 to this subpart (rows 6 through 8) must be reported as required in § 63.2281(c)(4). Instances when the work practice requirements in table 3 to this subpart (rows 6 through 8) are used are not considered to be deviations from (or violations of) the otherwise applicable compliance options, operating requirements and work practice requirements (in rows 1 through 5 of table 3 to this subpart) as long as you do not exceed the minimum amount of time necessary for these events and continuously monitor process unit bypass stack usage during the events as required in § 63.2240(e) and table 2 to this subpart.