Table 7 to Subpart DDDD of Part 63—Continuous Compliance With the Compliance Options and Operating Requirements
| For . . . | For the following compliance options and operating requirements . . . | You must demonstrate continuous compliance by . . . |
|---|---|---|
| (1) Each process unit listed in table 1B to this subpart or mixed PCWP process unit (defined in § 63.2292) | Compliance options in table 1B to this subpart and the operating requirements in table 2 to this subpart based on monitoring of operating parameters | Collecting and recording the operating parameter monitoring system data listed in table 2 to this subpart for the process unit according to §§ 63.2269(a) and (b) and 63.2270; and reducing the operating parameter monitoring system data to the specified averages in units of the applicable requirement according to calculations in § 63.2270; and maintaining the average operating parameter at or above the minimum, at or below the maximum, or within the range (whichever applies) established according to § 63.2262. |
| (2) Each process unit listed in tables 1A and 1B to this subpart | Compliance options in tables 1A and 1B to this subpart and the operating requirements in table 2 to this subpart based on THC CEMS data | Collecting and recording the THC monitoring data listed in table 2 to this subpart for the process unit according to § 63.2269(d); and reducing the CEMS data to 3-hour block averages according to calculations in § 63.2269(d); and maintaining the 3-hour block average THC concentration in the exhaust gases less than or equal to the THC concentration established according to § 63.2262. |
| (3) Each process unit using a biofilter | Compliance options in tables 1B to this subpart | Conducting a repeat performance test using the applicable method(s) specified in table 4 to this subpart 1 within 2 years following the previous performance test and within 180 days after each replacement of any portion of the biofilter bed media with a different type of media or each replacement of more than 50 percent (by volume) of the biofilter bed media with the same type of media. |
| (4) Each process unit using a catalytic oxidizer | Compliance options in table 1B to this subpart | Checking the activity level of a representative sample of the catalyst at least annually 2 and taking any necessary corrective action to ensure that the catalyst is performing within its design range. |
| (5) Each process unit listed in table 1A to this subpart | Compliance options in table 1A to this subpart and the operating requirements in table 2 to this subpart based on monitoring of process unit controlling operating parameters | Collecting and recording on a daily basis process unit controlling operating parameter data; and maintaining the operating parameter at or above the minimum, at or below the maximum, or within the range (whichever applies) established according to § 63.2262. |
| (6) Each Process unit listed in table 1B to this subpart using a wet control device as the sole means of reducing HAP emissions | Compliance options in table 1B to this subpart | Implementing your plan to address how organic HAP captured in the wastewater from the wet control device is contained or destroyed to minimize re-release to the atmosphere. |
| (7) Each process unit listed in table 1B to this subpart using a control device other than a biofilter | Compliance options in tables 1B to this subpart | Conducting a repeat performance test using the applicable method(s) specified in table 4 to this subpart 1 by August 13, 2023, or within 60 months following the previous performance test, whichever is later, and thereafter within 60 months following the previous performance test. |
| (8) Process unit listed in table 1C to this subpart | Total HAP compliance options in table 1C to this subpart and the operating requirements in table 2 to this subpart based on monitoring of operating parameters | The average total HAP emissions measured using the methods in table 4 to this subpart over the 3-hour performance test are no greater than the compliance option in table 1C to this subpart; and you have a record of the operating requirement(s) listed in table 2 to this subpart for the process unit over the performance test during which emissions did not exceed the compliance option value. |
| (9) Process unit listed in table 1C to this subpart | MDI compliance options in table 1C to this subpart and the operating requirements in table 2 to this subpart based on monitoring of operating parameters | The average MDI emissions measured using the methods in table 4 to this subpart over the 3-hour performance test are no greater than the compliance option in table 1C to this subpart; AND you have a record of the operating requirement(s) listed in table 2 to this subpart for the process unit over the performance test during which emissions did not exceed the compliance option value. |
| (10) Direct wood-fired PCWP dryer using a wet or dry electrostatic precipitator, wet scrubber, electrified filter bed, thermal oxidizer, catalytic oxidizer, or biofilter to meet the standards in table 1D or 1E to this subpart | Compliance options in § 63.2240(d)(2) and (3) and table 1D or 1E to this subpart and the operating requirements in table 2 to this subpart based on monitoring of operating parameters | Collecting and recording the operating parameter monitoring system data listed in table 2 to this subpart for the process unit according to §§ 63.2269(a) and (b) and 63.2270; and reducing the operating parameter monitoring system data to the specified averages in units of the applicable requirement according to calculations in § 63.2270; and maintaining the average operating parameter at or above the minimum, at or below the maximum, or within the range (whichever applies) established according to § 63.2262. |
| (11) Direct wood-fired PCWP dryer using a mechanical collector or other dry control device (not elsewhere listed in this table) or a WESP followed by a control device with a dry exhaust to meet the standards in table 1D or 1E to this subpart | Compliance options in § 63.2240(d)(2) and (3) and table 1D or 1E to this subpart and the operating requirements in table 2 to this subpart based on continuous opacity monitoring | Collecting and recording opacity data according to §§ 63.2269(e) and 63.2270; and reducing the opacity data to a 24-hour block average according to § 63.2270; and maintaining the average opacity at or below the maximum established according to § 63.2262. |
| (12) Process unit bypass stack (defined in § 63.2292) | Continuously monitor usage of the process unit bypass stack at all times while the process units are operating, undergoing startup or shutdown, and during the operating conditions specified in § 63.2250(f)(2) through (4) | Continuously monitoring and recording the duration of bypass stack usage according to §§ 63.2269(a) and (l) and 63.2270. |
| (13) Each process unit listed in table 1C, 1D, or 1E to this subpart | Total HAP and MDI limits in table 1C to this subpart (as applicable), and the PM, Hg, HCl, and PAH limits in table 1D or 1E to this subpart (as applicable), and the dioxin/furan TEQ limits in § 63.2240(d)(2) and (3) | Conducting a repeat performance test using the applicable method(s) specified in table 4 to this subpart1 within 60 months following the previous performance test. |
| (14) Direct wood-fired PCWP dryer using a mechanical collector or other dry control device (not elsewhere listed in this table) to meet the standards in table 1D or 1E to this subpart | Compliance options in § 63.2240(d)(2) and (3) and table 1D or 1E to this subpart and the operating requirements in table 2 to this subpart based on pressure drop monitoring and opacity observations | Collecting and recording pressure drop and opacity observations listed in table 2 to this subpart according to §§ 63.2269(a) and (f) and 63.2270; and reducing the pressure drop monitoring system data to the specified averages in units of the applicable requirement according to calculations in § 63.2270; and maintaining the average pressure drop above the minimum established according to § 63.2262; and maintaining the weekly opacity observations at or below the maximum established according to § 63.2262. |
| 1 When conducting a repeat performance test, the capture efficiency demonstration required in table 4 to this subpart, row 9 is not required to be repeated with the repeat emissions test if the capture device is maintained and operated consistent with its design as well as its operation during the previous capture efficiency demonstration conducted according to table 4 to this subpart, row 9 as specified in § 63.2267. | ||
| 2 You may forego the annual catalyst activity check during the calendar year when a performance test is conducted according to table 4 to this subpart. |
[91 FR 41452, July 6, 2026]