CBI, if you wish to assert a CBI claim, submit a complete report,
including information claimed to be CBI, to the EPA. The report must be
generated using the appropriate form on the CEDRI website or an
alternate electronic file consistent with the extensible markup
language (XML) schema listed on the CEDRI website. Submit the file on a
compact disc, flash drive, or other commonly used electronic storage
medium and clearly mark the medium as CBI. Mail the electronic medium
to U.S. Environmental Protection Agency, Office of Air Quality Planning
and Standards, Sector Policies and Programs Division, CORE CBI Office,
U.S. EPA Mailroom (C404-02), Attention: Miscellaneous Organic Chemical
Manufacturing Sector Lead, 4930 Old Page Rd., Durham, NC 27703. The
same file with the CBI omitted must be submitted to the EPA via the
EPA's CDX as described in this paragraph (e). All CBI claims must be
asserted at the time of submission. Furthermore under CAA section
114(c) emissions data is not entitled to confidential treatment, and
the EPA is required to make emissions data available to the public.
Thus, emissions data will not be protected as CBI and will be made
publicly available. You may assert a claim of EPA system outage or
force majeure for failure to timely comply with the reporting
requirement in this paragraph (e) provided you meet the requirements
outlined in paragraph (i) or (j) of this section, as applicable.
* * * * *
    (2) Statement by a responsible official with that official's name,
title, and signature, certifying the accuracy of the content of the
report. If your report is submitted via CEDRI, the certifier's
electronic signature during the submission process replaces the
requirement in this paragrpah (e)(2).
    (3) Date of report and beginning and ending dates of the reporting
period. You are no longer required to provide the date of report when
the report is submitted via CEDRI.
    (4) For each SSM during which excess emissions occur, the
compliance report must include records that the procedures specified in
your startup, shutdown, and malfunction plan (SSMP) were followed or
documentation of actions taken that are not consistent with the SSMP,
and include a brief description of each malfunction. On and after
August 12, 2023, this paragraph (e)(4) no longer

applies; however, for historical compliance purposes, a copy of the
plan must be retained and available on-site for five years after August
12, 2023.
    (5) * * *
    (ii) For each deviation from an emission limit, operating limit,
and work practice standard that occurs at an affected source where you
are not using a continuous monitoring system (CMS) to comply with the
emission limit or work practice standard in this subpart, you must
include the information in paragraphs (e)(5)(ii)(A) through (D) of this
section. This includes periods of SSM.
    (A) The total operating time in hours of the affected source during
the reporting period.
    (B) Except as specified in paragraph (e)(5)(ii)(D) of this section,
information on the number, duration, and cause of deviations (including
unknown cause, if applicable), as applicable, and the corrective action
taken.
* * * * *
    (D) Beginning no later than the compliance dates specified in Sec.
63.2445(g), paragraph (e)(5)(ii)(B) of this section no longer applies.
Instead, report information for each deviation to meet an applicable
standard. For each instance, report the start date, start time, and
duration in hours of each deviation. For each deviation, the report
must include a list of the affected sources or equipment, an estimate
of the quantity in pounds of each regulated pollutant emitted over any
emission limit, a description of the method used to estimate the
emissions, the cause of the deviation (including unknown cause, if
applicable), as applicable, and the corrective action taken.
    (iii) For each deviation from an emission limit or operating limit
occurring at an affected source where you are using a CMS to comply
with an emission limit in this subpart, you must include the
information in paragraphs (e)(5)(iii)(A) through (N) of this section.
This includes periods of SSM.
    (A) The start date, start time, and duration in hours that each CMS
was inoperative, except for zero (low-level) and high-level checks.
    (B) The start date, start time, and duration in hours that each
CEMS was out-of-control and a description of the corrective actions
taken.
    (C) Except as specified in paragraph (e)(5)(iii)(M) of this
section, the date and time that each deviation started and stopped, and
whether each deviation occurred during a period of startup, shutdown,
or malfunction or during another period.
    (D) The total duration in hours of all deviations for each CMS
during the reporting period, the total operating time in hours of the
affected source during the reporting period, and the total duration as
a percent of the total operating time of the affected source during
that reporting period.
    (E) Except as specified in paragraph (e)(5)(iii)(N) of this
section, a breakdown of the total duration of the deviations during the
reporting period into those that are due to startup, shutdown, control
equipment problems, process problems, other known causes, and other
unknown causes.
    (F) The total duration in hours of CMS downtime for each CMS during
the reporting period, and the total duration of CMS downtime as a
percent of the total operating time of the affected source during that
reporting period.
* * * * *
    (I) The monitoring equipment manufacturer(s) and model number(s)
and the pollutant or parameter monitored.
* * * * *
    (M) Beginning no later than the compliance dates specified in Sec.
63.2445(g), paragraph (e)(5)(iii)(C) of this section no longer applies.
Instead, report the number of deviation to meet an applicable standard.
For each instance, report the start date, start time and duration in
hours of each deviation. For each deviation, the report must include a
list of the affected sources or equipment, an estimate of the quantity
in pounds of each regulated pollutant emitted over any emission limit,
a description of the method used to estimate the emissions, and the
cause of the deviation (including unknown cause, if applicable), as
applicable, and the corrective action taken.
    (N) Beginning no later than the compliance dates specified in Sec.
63.2445(g), paragraph (e)(5)(iii)(E) of this section no longer applies.
Instead, report a breakdown of the total duration in hours of the
deviations during the reporting period into those that are due control
equipment problems, process problems, other known causes, and other
unknown causes.
* * * * *
    (7) Include each new operating scenario which has been operated
since the time period covered by the last compliance report and has not
been submitted in the notification of compliance status report or a
previous compliance report. For each new operating scenario, you must
report the information specified in Sec.  63.2525(b) and provide
verification that the operating conditions for any associated control
or treatment device have not been exceeded and that any required
calculations and engineering analyses have been performed. For the
purposes of this paragraph (e)(7), a revised operating scenario for an
existing process is considered to be a new operating scenario.
    (8) For process units added to a PUG, you must report the
description and rationale specified in Sec.  63.2525(i)(4). You must
report your primary product redeterminations specified in Sec.
63.2525(i)(5).
    (9) Except as specified in Sec. Sec.  63.2450(e)(4), 63.2480(f),
and 63.2485(p) and (q) and paragraph (t) of this section, applicable
records and information for periodic reports as specified in referenced
subparts F, G, H, SS, UU, WW, and GGG of this part and subpart F of 40
CFR part 65.
    (10) Except as specified in paragraph (e)(10)(ii) of this section,
whenever you make a process change, or change any of the information
submitted in the notification of compliance status report or a previous
compliance report, that is not within the scope of an existing
operating scenario, you must document the change in your compliance
report. A process change does not include moving within a range of
conditions identified in the standard batch, and a nonstandard batch
does not constitute a process change.
    (i) The notification must include all of the information in
paragraphs (e)(10)(i)(A) through (C) of this section.
    (A) A description of the process change.
    (B) Revisions to any of the information reported in the original
notification of compliance status report under paragraph (d) of this
section.
    (C) Information required by the notification of compliance status
report under paragraph (d) of this section for changes involving the
addition of processes or equipment at the affected source.
    (ii) You must submit a report 60 days before the scheduled
implementation date of any of the changes identified in paragraph
(e)(10)(ii)(A), (B), or (C) of this section.
    (A) Any change to the information contained in the precompliance
report.
    (B) A change in the status of a control device from small to large.
    (C) A change from Group 2 to Group 1 for any emission point except
for batch process vents that meet the conditions specified in Sec.
63.2460(b)(6)(i).
    (11) For each flare subject to the requirements in Sec.
63.2450(e)(5), the compliance report must include the items specified
in paragraphs (e)(11)(i) through (vi) of this section in lieu of the

information required in Sec.  63.999(c)(3) of subpart SS.
    (i) Records as specified in Sec.  63.2525(m)(1) for each 15-minute
block during which there was at least one minute when regulated
material is routed to a flare and no pilot flame or flare flame is
present. Include the start and stop time and date of each 15-minute
block.
    (ii) Visible emission records as specified in Sec.
63.2525(m)(2)(iv) for each period of 2 consecutive hours during which
visible emissions exceeded a total of 5 minutes.
    (iii) The periods specified in Sec.  63.2525(m)(6). Indicate the
date and start and end times for each period, and the net heating value
operating parameter(s) determined following the methods in Sec.
63.670(k) through (n) of subpart CC as applicable.
    (iv) For flaring events meeting the criteria in Sec. Sec.
63.670(o)(3) of subpart CC and 63.2450(e)(5)(v):
    (A) The start and stop time and date of the flaring event.
    (B) The length of time in minutes for which emissions were visible
from the flare during the event.
    (C) For steam-assisted, air-assisted, and non-assisted flares, the
start date, start time, and duration in minutes for periods of time
that the flare tip velocity exceeds the maximum flare tip velocity
determined using the methods in Sec.  63.670(d)(2) of subpart CC and
the maximum 15-minute block average flare tip velocity in ft/sec
recorded during the event.
    (D) Results of the root cause and corrective actions analysis
completed during the reporting period, including the corrective actions
implemented during the reporting period and, if applicable, the
implementation schedule for planned corrective actions to be
implemented subsequent to the reporting period.
    (v) For pressure-assisted multi-point flares, the periods of time
when the pressure monitor(s) on the main flare header show the burners
operating outside the range of the manufacturer's specifications.
Indicate the date and start and end times for each period.
    (vi) For pressure-assisted multi-point flares, the periods of time
when the staging valve position indicator monitoring system indicates a
stage should not be in operation and is or when a stage should be in
operation and is not. Indicate the date and start and end times for
each period.
    (12) For bypass lines subject to the requirements Sec.
63.2450(e)(6), the compliance report must include the start date, start
time, duration in hours, estimate of the volume of gas in standard
cubic feet, the concentration of organic HAP in the gas in parts per
million by volume and the resulting mass emissions of organic HAP in
pounds that bypass a control device. For periods when the flow
indicator is not operating, report the start date, start time, and
duration in hours.
    (13) For each nonregenerative adsorber and regenerative adsorber
that is regenerated offsite subject to the requirements in Sec.
63.2450(e)(7), you must report the date of each instance when
breakthrough, as defined in Sec.  63.2550(i), is detected between the
first and second adsorber and the adsorber is not replaced according to
Sec.  63.2450(e)(7)(iii)(A).
    (14) For any maintenance vent release exceeding the applicable
limits in Sec.  63.2450(v)(1), the compliance report must include the
information specified in paragraphs (e)(14)(i) through (iv) of this
section. For the purposes of this reporting requirement, if you comply
with Sec.  63.2450(v)(1)(iv) then you must report each venting event
conducted under those provisions and include an explanation for each
event as to why utilization of this alternative was required.
    (i) Identification of the maintenance vent and the equipment served
by the maintenance vent.
    (ii) The date and time the maintenance vent was opened to the
atmosphere.
    (iii) The lower explosive limit in percent, vessel pressure in
psig, or mass in pounds of VOC in the equipment, as applicable, at the
start of atmospheric venting. If the 5 psig vessel pressure option in
Sec.  63.2450(v)(1)(ii) was used and active purging was initiated while
the lower explosive limit was 10 percent or greater, also include the
lower explosive limit of the vapors at the time active purging was
initiated.
    (iv) An estimate of the mass in pounds of organic HAP released
during the entire atmospheric venting event.
    (15) Compliance reports for pressure relief devices subject to the
requirements Sec.  63.2480(e) must include the information specified in
paragraphs (e)(15)(i) through (iii) of this section.
    (i) For pressure relief devices in organic HAP gas or vapor
service, pursuant to Sec.  63.2480(e)(1), report the instrument
readings and dates for all readings of 500 ppmv or greater.
    (ii) For pressure relief devices in organic HAP gas or vapor
service subject to Sec.  63.2480(e)(2), report the instrument readings
and dates of instrument monitoring conducted.
    (iii) For pressure relief devices in organic HAP service subject to
Sec.  63.2480(e)(3), report each pressure release to the atmosphere,
including the start date, start time, and duration in minutes of the
pressure release and an estimate of the mass quantity in pounds of each
organic HAP released; the results of any root cause analysis and
corrective action analysis completed during the reporting period,
including the corrective actions implemented during the reporting
period; and, if applicable, the implementation schedule for planned
corrective actions to be implemented subsequent to the reporting
period.
    (16) For each heat exchange system subject to Sec.  63.2490(d),
beginning no later than the compliance dates specified in Sec.
63.2445(g), the reporting requirements of Sec.  63.104(f)(2) no longer
apply; instead, the compliance report must include the information
specified in paragraphs (e)(16)(i) through (v) of this section.
    (i) The number of heat exchange systems at the plant site subject
to the monitoring requirements in Sec.  63.2490(d) during the reporting
period;
    (ii) The number of heat exchange systems subject to the monitoring
requirements in Sec.  63.2490(d) at the plant site found to be leaking
during the reporting period;
    (iii) For each monitoring location where the total strippable
hydrocarbon concentration or total hydrocarbon mass emissions rate was
determined to be equal to or greater than the applicable leak
definitions specified in Sec.  63.2490(d)(1)(v) during the reporting
period, identification of the monitoring location (e.g., unique
monitoring location or heat exchange system ID number), the measured
total strippable hydrocarbon concentration or total hydrocarbon mass
emissions rate, the date the leak was first identified, and, if
applicable, the date the source of the leak was identified;
    (iv) For leaks that were repaired during the reporting period
(including delayed repairs), identification of the monitoring location
associated with the repaired leak, the total strippable hydrocarbon
concentration or total hydrocarbon mass emissions rate measured during
re-monitoring to verify repair, and the re-monitoring date (i.e., the
effective date of repair); and
    (v) For each delayed repair, identification of the monitoring
location associated with the leak for which repair is delayed, the date
when the delay of repair began, the date the repair is expected to be
completed (if the leak is not repaired during the reporting period),
the total strippable hydrocarbon concentration or total hydrocarbon
mass emissions rate and date of each monitoring event conducted on the

delayed repair during the reporting period, and an estimate in pounds
of the potential total hydrocarbon emissions over the reporting period
associated with the delayed repair.
    (17) For process vents and storage tanks in ethylene oxide service
subject to the requirements of Sec.  63.2493, the compliance report
must include:
    (i) The periods specified in Sec.  63.2525(s)(4). Indicate the date
and start and end times for each period.
    (ii) If you obtain an instrument reading greater than 500 ppmv of a
leak when monitoring a pressure vessel in accordance with Sec.
63.2493(c)(2), submit a copy of the records specified in Sec.
63.2525(s)(5)(ii).
    (iii) Reports for equipment subject to the requirements of Sec.
63.2493 as specified in paragraph (e)(9) of this section.
    (f) Performance test reports. Beginning no later than October 13,
2020, you must submit performance test reports in accordance with this
paragraph (f). Unless otherwise specified in this subpart, within 60
days after the date of completing each performance test required by
this subpart, you must submit the results of the performance test
following the procedures specified in paragraphs (f)(1) through (3) of
this section.
    (1) Data collected using test methods supported by the EPA's
Electronic Reporting Tool (ERT) as listed on the EPA's ERT website
(https://www.epa.gov/electronic-reporting-air-emissions/electronic-reporting-tool-ert) at the time of the test. Submit the results of the
performance test to the EPA via CEDRI, which can be accessed through
the EPA's CDX (https://cdx.epa.gov/). The data must be submitted in a
file format generated through the use of the EPA's ERT. Alternatively,
you may submit an electronic file consistent with the extensible markup
language (XML) schema listed on the EPA's ERT website.
    (2) Data collected using test methods that are not supported by the
EPA's ERT as listed on the EPA's ERT website at the time of the test.
The results of the performance test must be included as an attachment
in the ERT or an alternate electronic file consistent with the XML
schema listed on the EPA's ERT website. Submit the ERT generated
package or alternative file to the EPA via CEDRI.
    (3) Confidential business information (CBI). The EPA will make all
the information submitted through CEDRI available to the public without
further notice to you. Do not use CEDRI to submit information you claim
as CBI. Anything submitted using CEDRI cannot later be claimed to be
CBI. Although we do not expect persons to assert a claim of CBI, if you
wish to assert a CBI claim, you must submit a complete file, including
information claimed to be CBI, to the EPA. The file must be generated
through the use of the EPA's ERT or an alternate electronic file
consistent with the XML schema listed on the EPA's ERT website. Submit
the file on a compact disc, flash drive, or other commonly used
electronic storage medium and clearly mark the medium as CBI. Mail the
electronic medium to U.S. Environmental Protection Agency, Office of
Air Quality Planning and Standards, Sector Policies and Programs
Division, CORE CBI Office, U.S. EPA Mailroom (C404-02), Attention:
Group Leader, Measurement Policy Group, 4930 Old Page Rd., Durham, NC
27703. The same file with the CBI omitted must be submitted to the EPA
via the EPA's CDX as described in paragraph (f)(1) and (2) of this
section. All CBI claims must be asserted at the time of submission.
Furthermore, under CAA section 114(c) emissions data is not entitled to
confidential treatment, and the EPA is required to make emissions data
available to the public. Thus, emissions data will not be protected as
CBI and will be made publicly available.
    (g) CEMS relative accuracy test audit (RATA) Performance evaluation
reports. Beginning no later than October 13, 2020, you must start
submitting CEMS RATA performance evaluation reports in accordance with
this paragraph (g). Unless otherwise specified in this subpart, within
60 days after the date of completing each continuous monitoring system
performance evaluation (as defined in Sec.  63.2), you must submit the
results of the performance evaluation following the procedures
specified in paragraphs (g)(1) through (3) of this section.
    (1) Performance evaluations of CMS measuring RATA pollutants that
are supported by the EPA's ERT as listed on the EPA's ERT website at
the time of the evaluation. Submit the results of the performance
evaluation to the EPA via CEDRI, which can be accessed through the
EPA's CDX. The data must be submitted in a file format generated
through the use of the EPA's ERT. Alternatively, you may submit an
electronic file consistent with the XML schema listed on the EPA's ERT
website.
    (2) Performance evaluations of CMS measuring RATA pollutants that
are not supported by the EPA's ERT as listed on the EPA's ERT website
at the time of the evaluation. The results of the performance
evaluation must be included as an attachment in the ERT or an alternate
electronic file consistent with the XML schema listed on the EPA's ERT
website. Submit the ERT generated package or alternative file to the
EPA via CEDRI.
    (3) Confidential business information (CBI). The EPA will make all
the information submitted through CEDRI available to the public without
further notice to you. Do not use CEDRI to submit information you claim
as CBI. Anything submitted using CEDRI cannot later be claimed to be
CBI. Although we do not expect persons to assert a claim of CBI, if you
wish to assert a CBI claim, you must submit a complete file, including
information claimed to be CBI, to the EPA. The file must be generated
through the use of the EPA's ERT or an alternate electronic file
consistent with the XML schema listed on the EPA's ERT website. Submit
the file on a compact disc, flash drive, or other commonly used
electronic storage medium and clearly mark the medium as CBI. Mail the
electronic medium to U.S. Environmental Protection Agency, Office of
Air Quality Planning and Standards, Sector Policies and Programs
Division, CORE CBI Office, U.S. EPA Mailroom (C404-02), Attention:
Group Leader, Measurement Policy Group, 4930 Old Page Rd., Durham, NC
27703. The same file with the CBI omitted must be submitted to the EPA
via the EPA's CDX as described in paragraphs (g)(1) and (2) of this
section. All CBI claims must be asserted at the time of submission.
Furthermore, under CAA section 114(c) emissions data is not entitled to
confidential treatment, and the EPA is required to make emissions data
available to the public. Thus, emissions data will not be protected as
CBI and will be made publicly available.
    (h) Claims of EPA system outage. If you are required to
electronically submit a report through CEDRI in the EPA's CDX, you may
assert a claim of EPA system outage for failure to timely comply with
that reporting requirement. To assert a claim of EPA system outage, you
must meet the requirements outlined in paragraphs (h)(1) through (7) of
this section.
    (1) You must have been or will be precluded from accessing CEDRI
and submitting a required report within the time prescribed due to an
outage of either the EPA's CEDRI or CDX systems.
    (2) The outage must have occurred within the period of time
beginning five business days prior to the date that the submission is
due.
    (3) The outage may be planned or unplanned.
    (4) You must submit notification to the Administrator in writing as
soon as possible following the date you first

knew, or through due diligence should have known, that the event may
cause or has caused a delay in reporting.
    (5) You must provide to the Administrator a written description
identifying:
    (i) The date(s) and time(s) when CDX or CEDRI was accessed and the
system was unavailable;
    (ii) A rationale for attributing the delay in reporting beyond the
regulatory deadline to EPA system outage;
    (iii) A description of measures taken or to be taken to minimize
the delay in reporting; and
    (iv) The date by which you propose to report, or if you have
already met that reporting requirement at the time of the notification,
the date you reported.
    (6) The decision to accept the claim of EPA system outage and allow
an extension to the reporting deadline is solely within the discretion
of the Administrator.
    (7) In any circumstance, the report must be submitted
electronically as soon as possible after the outage is resolved.
    (i) Claims of force majeure. If you are required to electronically
submit a report through CEDRI in the EPA's CDX, you may assert a claim
of force majeure for failure to timely comply with that reporting
requirement. To assert a claim of force majeure, you must meet the
requirements outlined in paragraphs (i)(1) through (5) of this section.
    (1) You may submit a claim if a force majeure event is about to
occur, occurs, or has occurred or there are lingering effects from such
an event within the period of time beginning five business days prior
to the date the submission is due. For the purposes of this paragraph
(i)(1), a force majeure event is defined as an event that will be or
has been caused by circumstances beyond the control of the affected
facility, its contractors, or any entity controlled by the affected
facility that prevents you from complying with the requirement to
submit a report electronically within the time period prescribed.
Examples of such events are acts of nature (e.g., hurricanes,
earthquakes, or floods), acts of war or terrorism, or equipment failure
or safety hazard beyond the control of the affected facility (e.g.,
large scale power outage).
    (2) You must submit notification to the Administrator in writing as
soon as possible following the date you first knew, or through due
diligence should have known, that the event may cause or has caused a
delay in reporting.
    (3) You must provide to the Administrator:
    (i) A written description of the force majeure event;
    (ii) A rationale for attributing the delay in reporting beyond the
regulatory deadline to the force majeure event;
    (iii) A description of measures taken or to be taken to minimize
the delay in reporting; and
    (iv) The date by which you propose to report, or if you have
already met the reporting requirement at the time of the notification,
the date you reported.
    (4) The decision to accept the claim of force majeure and allow an
extension to the reporting deadline is solely within the discretion of
the Administrator.
    (5) In any circumstance, the reporting must occur as soon as
possible after the force majeure event occurs.

0
21. Section 63.2525 is amended by revising the introductory text and
paragraphs (a), (e)(1)(ii), (f), (h), and (j) and adding paragraphs (l)
through (u) to read as follows:

Sec.  63.2525  What records must I keep?

    You must keep the records specified in paragraphs (a) through (t)
of this section.
    (a) Except as specified in Sec. Sec.  63.2450(e)(4), 63.2480(f),
and 63.2485(p) and (q) and paragraph (t) of this section, each
applicable record required by subpart A of this part and in referenced
subparts F, G, SS, UU, WW, and GGG of this part and in referenced
subpart F of 40 CFR part 65.
* * * * *
    (e) * * *
    (1) * * *
    (ii) You control the Group 2 batch process vents using a flare that
meets the requirements of Sec.  63.987 or Sec.  63.2450(e)(5), as
applicable.
* * * * *
    (f) A record of each time a safety device is opened to avoid unsafe
conditions in accordance with Sec.  63.2450(p).
* * * * *
    (h) Except as specified in paragraph (l) of this section, for each
CEMS, you must keep records of the date and time that each deviation
started and stopped, and whether the deviation occurred during a period
of startup, shutdown, or malfunction or during another period.
* * * * *
    (j) In the SSMP required by Sec.  63.6(e)(3) of subpart A, you are
not required to include Group 2 emission points, unless those emission
points are used in an emissions average. For equipment leaks, the SSMP
requirement is limited to control devices and is optional for other
equipment. On and after August 12, 2023, this paragraph (j) no longer
applies.
* * * * *
    (l) Beginning no later than the compliance dates specified in Sec.
63.2445(g), paragraph (h) of this section no longer applies. Instead,
for each deviation from an emission limit, operating limit, or work
practice standard, you must keep a record of the information specified
in paragraph (l)(1) through (3) of this section. The records shall be
maintained as specified in Sec.  63.10(b)(1) of subpart A.
    (1) In the event that an affected unit does not meet an applicable
standard, record the number of deviations. For each deviation record
the date, time, and duration of each deviation.
    (2) For each deviation from an applicable standard, record and
retain a list of the affected sources or equipment, 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.
    (3) Record actions taken to minimize emissions in accordance with
Sec.  63.2450(u) and any corrective actions taken to return the
affected unit to its normal or usual manner of operation.
    (m) For each flare subject to the requirements in Sec.
63.2450(e)(5), you must keep records specified in paragraphs (m)(1)
through (14) of this section in lieu of the information required in
Sec.  63.998(a)(1) of subpart SS.
    (1) Retain records of the output of the monitoring device used to
detect the presence of a pilot flame or flare flame as required in
Sec.  63.670(b) of subpart CC and the presence of a pilot flame as
required in Sec.  63.2450(e)(5)(viii)(D) for a minimum of 2 years.
Retain records of each 15-minute block during which there was at least
one minute that no pilot flame or flare flame is present when regulated
material is routed to a flare for a minimum of 5 years. For a pressure-
assisted multi-point flare that uses cross-lighting, retain records of
each 15-minute block during which there was at least one minute that no
pilot flame is present on each stage when regulated material is routed
to a flare for a minimum of 5 years. You may reduce the collected
minute-by-minute data to a 15-minute block basis with an indication of
whether there was at least one minute where no pilot flame or flare
flame was present.
    (2) Retain records of daily visible emissions observations as
specified in paragraphs (m)(2)(i) through (iv) of this section, as
applicable, for a minimum of 3 years.
    (i) To determine when visible emissions observations are required,
the record must identify all periods when regulated material is vented
to the flare.
    (ii) If visible emissions observations are performed using Method
22 of 40

CFR part 60, appendix A-7, then the record must identify whether the
visible emissions observation was performed, the results of each
observation, total duration of observed visible emissions, and whether
it was a 5-minute or 2-hour observation. Record the date and start time
of each visible emissions observation.
    (iii) If a video surveillance camera is used pursuant to Sec.
63.670(h)(2) of subpart CC, then the record must include all video
surveillance images recorded, with time and date stamps.
    (iv) For each 2 hour period for which visible emissions are
observed for more than 5 minutes in 2 consecutive hours, then the
record must include the date and start and end time of the 2 hour
period and an estimate of the cumulative number of minutes in the 2
hour period for which emissions were visible.
    (3) The 15-minute block average cumulative flows for flare vent gas
and, if applicable, total steam, perimeter assist air, and premix
assist air specified to be monitored under Sec.  63.670(i) of subpart
CC, along with the date and time interval for the 15-minute block. If
multiple monitoring locations are used to determine cumulative vent gas
flow, total steam, perimeter assist air, and premix assist air, then
retain records of the 15-minute block average flows for each monitoring
location for a minimum of 2 years, and retain the 15-minute block
average cumulative flows that are used in subsequent calculations for a
minimum of 5 years. If pressure and temperature monitoring is used,
then retain records of the 15-minute block average temperature,
pressure, and molecular weight of the flare vent gas or assist gas
stream for each measurement location used to determine the 15-minute
block average cumulative flows for a minimum of 2 years, and retain the
15-minute block average cumulative flows that are used in subsequent
calculations for a minimum of 5 years.
    (4) The flare vent gas compositions specified to be monitored under
Sec.  63.670(j) of subpart CC. Retain records of individual component
concentrations from each compositional analysis for a minimum of 2
years. If an NHVvg analyzer is used, retain records of the 15-minute
block average values for a minimum of 5 years.
    (5) Each 15-minute block average operating parameter calculated
following the methods specified in Sec.  63.670(k) through (n) of
subpart CC, as applicable.
    (6) All periods during which operating values are outside of the
applicable operating limits specified in Sec. Sec.  63.670(d) through
(f) of subpart CC and 63.2450(e)(5)(viii) when regulated material is
being routed to the flare.
    (7) All periods during which you do not perform flare monitoring
according to the procedures in Sec.  63.670(g) through (j) of subpart
CC.
    (8) For pressure-assisted multi-point flares, if a stage of burners
on the flare uses cross-lighting, then a record of any changes made to
the distance between burners.
    (9) For pressure-assisted multi-point flares, all periods when the
pressure monitor(s) on the main flare header show burners are operating
outside the range of the manufacturer's specifications. Indicate the
date and time for each period, the pressure measurement, the stage(s)
and number of burners affected, and the range of manufacturer's
specifications.
    (10) For pressure-assisted multi-point flares, all periods when the
staging valve position indicator monitoring system indicates a stage of
the pressure-assisted multi-point flare should not be in operation and
when a stage of the pressure-assisted multi-point flare should be in
operation and is not. Indicate the date and time for each period,
whether the stage was supposed to be open, but was closed or vice
versa, and the stage(s) and number of burners affected.
    (11) Records of periods when there is flow of vent gas to the
flare, but when there is no flow of regulated material to the flare,
including the start and stop time and dates of periods of no regulated
material flow.
    (12) Records when the flow of vent gas exceeds the smokeless
capacity of the flare, including start and stop time and dates of the
flaring event.
    (13) Records of the root cause analysis and corrective action
analysis conducted as required in Sec. Sec.  63.670(o)(3) of subpart CC
and 63.2450(e)(5)(v), including an identification of the affected
flare, the date and duration of the event, a statement noting whether
the event resulted from the same root cause(s) identified in a previous
analysis and either a description of the recommended corrective
action(s) or an explanation of why corrective action is not necessary
under Sec.  63.670(o)(5)(i) of subpart CC.
    (14) For any corrective action analysis for which implementation of
corrective actions are required in Sec.  63.670(o)(5) of subpart CC, a
description of the corrective action(s) completed within the first 45
days following the discharge and, for action(s) not already completed,
a schedule for implementation, including proposed commencement and
completion dates.
    (n) For each flow event from a bypass line subject to the
requirements in Sec.  63.2450(e)(6), you must maintain records
sufficient to determine whether or not the detected flow included flow
requiring control. For each flow event from a bypass line requiring
control that is released either directly to the atmosphere or to a
control device not meeting the requirements specified in Tables 1
through 7 to this subpart, you must include an estimate of the volume
of gas, the concentration of organic HAP in the gas and the resulting
emissions of organic HAP that bypassed the control device using process
knowledge and engineering estimates.
    (o) For each nonregenerative adsorber and regenerative adsorber
that is regenerated offsite subject to the requirements in Sec.
63.2450(e)(7), you must keep the applicable records specified in
paragraphs (o)(1) through (4) of this section.
    (1) Outlet HAP or TOC concentration for each adsorber bed measured
during each performance test conducted.
    (2) Daily outlet HAP or TOC concentration.
    (3) Date and time you last replaced the adsorbent.
    (4) If you conduct monitoring less frequently than daily as
specified in Sec.  63.2450(e)(7)(iii)(B), you must record the average
life of the bed.
    (p) For each maintenance vent opening subject to the requirements
in Sec.  63.2450(v), you must keep the applicable records specified in
paragraphs (p)(1) through (5) of this section.
    (1) You must maintain standard site procedures used to deinventory
equipment for safety purposes (e.g., hot work or vessel entry
procedures) to document the procedures used to meet the requirements in
Sec.  63.2450(v). The current copy of the procedures must be retained
and available on-site at all times. Previous versions of the standard
site procedures, as applicable, must be retained for five years.
    (2) If complying with the requirements of Sec.  63.2450(v)(1)(i)
and the lower explosive limit at the time of the vessel opening exceeds
10 percent, identification of the maintenance vent, the process units
or equipment associated with the maintenance vent, the date of
maintenance vent opening, and the lower explosive limit at the time of
the vessel opening.
    (3) If complying with the requirements of Sec.  63.2450(v)(1)(ii)
and either the vessel pressure at the time of the vessel opening
exceeds 5 psig or the lower explosive limit at the time of the active
purging was initiated exceeds 10 percent, identification of the

maintenance vent, the process units or equipment associated with the
maintenance vent, the date of maintenance vent opening, the pressure of
the vessel or equipment at the time of discharge to the atmosphere and,
if applicable, the lower explosive limit of the vapors in the equipment
when active purging was initiated.
    (4) If complying with the requirements of Sec.  63.2450(v)(1)(iii),
records of the estimating procedures used to determine the total
quantity of VOC in the equipment and the type and size limits of
equipment that contain less than 50 pounds of VOC at the time of
maintenance vent opening. For each maintenance vent opening that
contains greater than 50 pounds of VOC for which the deinventory
procedures specified in paragraph (p)(1) of this section are not
followed or for which the equipment opened exceeds the type and size
limits established in the records specified in this paragraph (p)(4),
records that identify the maintenance vent, the process units or
equipment associated with the maintenance vent, the date of maintenance
vent opening, and records used to estimate the total quantity of VOC in
the equipment at the time the maintenance vent was opened to the
atmosphere.
    (5) If complying with the requirements of Sec.  63.2450(v)(1)(iv),
identification of the maintenance vent, the process units or equipment
associated with the maintenance vent, records documenting actions taken
to comply with other applicable alternatives and why utilization of
this alternative was required, the date of maintenance vent opening,
the equipment pressure and lower explosive limit of the vapors in the
equipment at the time of discharge, an indication of whether active
purging was performed and the pressure of the equipment during the
installation or removal of the blind if active purging was used, the
duration the maintenance vent was open during the blind installation or
removal process, and records used to estimate the total quantity of VOC
in the equipment at the time the maintenance vent was opened to the
atmosphere for each applicable maintenance vent opening.
    (q) For each pressure relief device subject to the pressure release
management work practice standards in Sec.  63.2480(e), you must keep
the records specified in paragraphs (q)(1) through (3) of this section.
    (1) Records of the prevention measures implemented as required in
Sec.  63.2480(e)(3)(ii).
    (2) Records of the number of releases during each calendar year and
the number of those releases for which the root cause was determined to
be a force majeure event. Keep these records for the current calendar
year and the past 5 calendar years.
    (3) For each release to the atmosphere, you must keep the records
specified in paragraphs (q)(3)(i) through (iv) of this section.
    (i) The start and end time and date of each pressure release to the
atmosphere.
    (ii) Records of any data, assumptions, and calculations used to
estimate of the mass quantity of each organic HAP released during the
event.
    (iii) Records of the root cause analysis and corrective action
analysis conducted as required in Sec.  63.2480(e)(3)(iii), including
an identification of the affected facility, a statement noting whether
the event resulted from the same root cause(s) identified in a previous
analysis and either a description of the recommended corrective
action(s) or an explanation of why corrective action is not necessary
under Sec.  63.2480(e)(7)(i).
    (iv) For any corrective action analysis for which implementation of
corrective actions are required in Sec.  63.2480(e)(7), a description
of the corrective action(s) completed within the first 45 days
following the discharge and, for action(s) not already completed, a
schedule for implementation, including proposed commencement and
completion dates.
    (r) For each heat exchange system, beginning no later than the
compliance dates specified in Sec.  63.2445(g), the recordkeeping
requirements of Sec.  63.104(f)(1) no longer apply; instead, you must
keep records in paragraphs (r)(1) through (4) of this section.
    (1) Monitoring data required by Sec.  63.2490(d) that indicate a
leak, the date the leak was detected, or, if applicable, the basis for
determining there is no leak.
    (2) The dates of efforts to repair leaks.
    (3) The method or procedures used to confirm repair of a leak and
the date the repair was confirmed.
    (4) Documentation of delay of repair as specified in paragraphs
(r)(4)(i) through (iv) of this section.
    (i) The reason(s) for delaying repair.
    (ii) A schedule for completing the repair as soon as practical.
    (iii) The date and concentration or mass emissions rate of the leak
as first identified and the results of all subsequent monitoring events
during the delay of repair.
    (iv) An estimate of the potential total hydrocarbon emissions from
the leaking heat exchange system or heat exchanger for each required
delay of repair monitoring interval following the procedures in
paragraphs (r)(4)(iv)(A) through (C) of this section.
    (A) If you comply with the total strippable hydrocarbon
concentration leak action level, as specified in Sec.
63.2490(d)(1)(iv), you must calculate the mass emissions rate by
complying with the requirements of Sec.  63.2490(d)(1)(iii)(B) or by
determining the mass flow rate of the cooling water at the monitoring
location where the leak was detected. If the monitoring location is an
individual cooling tower riser, determine the total cooling water mass
flow rate to the cooling tower. Cooling water mass flow rates may be
determined using direct measurement, pump curves, heat balance
calculations, or other engineering methods. If you determine the mass
flow rate of the cooling water, calculate the mass emissions rate by
converting the stripping gas leak concentration (in ppmv as methane) to
an equivalent liquid concentration, in parts per million by weight
(ppmw), using equation 7-1 from ``Air Stripping Method (Modified El
Paso Method) for Determination of Volatile Organic Compound Emissions
from Water Sources'' (incorporated by reference--see Sec.  63.14) and
multiply the equivalent liquid concentration by the mass flow rate of
the cooling water.
    (B) For delay of repair monitoring intervals prior to repair of the
leak, calculate the potential total hydrocarbon emissions for the
leaking heat exchange system or heat exchanger for the monitoring
interval by multiplying the mass emissions rate, determined in Sec.
63.2490(d)(1)(iii)(B) or paragraph (r)(4)(iv)(A) of this section, by
the duration of the delay of repair monitoring interval. The duration
of the delay of repair monitoring interval is the time period starting
at midnight on the day of the previous monitoring event or at midnight
on the day the repair would have had to be completed if the repair had
not been delayed, whichever is later, and ending at midnight of the day
the of the current monitoring event.
    (C) For delay of repair monitoring intervals ending with a repaired
leak, calculate the potential total hydrocarbon emissions for the
leaking heat exchange system or heat exchanger for the final delay of
repair monitoring interval by multiplying the duration of the final
delay of repair monitoring interval by the mass emissions rate
determined for the last monitoring event prior to the re-monitoring
event used to verify the leak was repaired. The duration of the final
delay of repair monitoring interval is the time period starting at
midnight of the

day of the last monitoring event prior to re-monitoring to verify the
leak was repaired and ending at the time of the re-monitoring event
that verified that the leak was repaired.
    (s) For process vents and storage tanks in ethylene oxide service
subject to the requirements of Sec.  63.2493, you must keep the records
specified in paragraphs (s)(1) through (5) of this section in addition
to those records specified in paragraph (a) of this section. Records
for equipment in ethylene oxide service subject to the requirements of
Sec.  63.2493 are specified in paragraph (a) of this section.
    (1) For process vents, include all uncontrolled, undiluted ethylene
oxide concentration measurements, and the calculations you used to
determine the total uncontrolled ethylene oxide mass emission rate for
the sum of all vent gas streams.
    (2) For storage tanks, records of the concentration of ethylene
oxide of the fluid stored in each storage tank.
    (3) For equipment, records of the percent ethylene oxide content of
the process fluid and the method used to determine it.
    (4) If you vent emissions through a closed-vent system to a non-
flare control device, then you must keep records of all periods during
which operating values are outside of the applicable operating limits
specified in Sec.  63.2493(b)(4) through (6) when regulated material is
being routed to the non-flare control device. The record must specify
the operating parameter, the applicable limit, and the highest (for
maximum operating limits) or lowest (for minimum operating limits)
value recorded during the period.
    (5) For pressure vessels subject to Sec.  63.2493(c), records as
specified in paragraphs (s)(5)(i) through (iv) of this section.
    (i) The date of each performance test conducted according to Sec.
63.2493(c)(2).
    (ii) The instrument reading of each performance test conducted
according to Sec.  63.2493(c)(2), including the following:
    (A) Date each defect was detected.
    (B) Date of the next performance test that shows the instrument
reading is less than 500 ppmv.
    (C) Start and end dates of each period after the date in paragraph
(s)(5)(ii)(A) of this section when the pressure vessel was completely
empty.
    (D) Estimated emissions from each defect.
    (t) Any records required to be maintained by this part that are
submitted electronically via the EPA's CEDRI may be maintained in
electronic format. This ability to maintain electronic copies does not
affect the requirement for facilities to make records, data, and
reports available upon request to a delegated air agency or the EPA as
part of an on-site compliance evaluation.
    (u) Beginning no later than the compliance dates specified in Sec.
63.2445(g), the referenced provisions specified in paragraphs (u)(1)
through (8) of this section do not apply when demonstrating compliance
with paragraph (a) of this section.
    (1) Section 63.103(c)(2)(i) of subpart F.
    (2) Section 63.103(c)(2)(ii) of subpart F.
    (3) The phrase ``start-up, shutdown and malfunction and'' from
Sec.  63.103(c)(3) of subpart F.
    (4) The phrase ``other than startups, shutdowns, or malfunctions
(e.g., a temperature reading of -200 [deg]C on a boiler),'' from Sec.
63.152(g)(1)(i) of subpart G.
    (5) The phrase ``other than a startup, shutdown, or malfunction''
from Sec.  63.152(g)(1)(ii)(C) of subpart G.
    (6) The phrase ``other than startups, shutdowns, or malfunctions''
from Sec.  63.152(g)(1)(iii) of subpart G.
    (7) The phrase ``other than a startup, shutdown, or malfunction''
from Sec.  63.152(g)(2)(iii) of subpart G.
    (8) Section 63.152(g)(2)(iv)(A) of subpart G.

0
22. Section 63.2535 is amended by revising the introductory text and
paragraphs (d) and (k) and adding paragraph (m) to read as follows:

Sec.  63.2535  What compliance options do I have if part of my plant is
subject to both this subpart and another subpart?

    For any equipment, emission stream, or wastewater stream not
subject to Sec.  63.2493 but subject to other provisions of both this
subpart and another subpart, you may elect to comply only with the
provisions as specified in paragraphs (a) through (l) of this section.
You also must identify the subject equipment, emission stream, or
wastewater stream, and the provisions with which you will comply, in
your notification of compliance status report required by Sec.
63.2520(d).
* * * * *
    (d) Compliance with subpart I, GGG, or MMM of this part. After the
compliance dates specified in Sec.  63.2445, if you have an affected
source with equipment subject to subpart I, GGG, or MMM of this part,
you may elect to comply with the provisions of subpart H, GGG, or MMM
of this part, respectively, for all such equipment, except the
affirmative defense requirements in subparts GGG and MMM no longer
apply.
* * * * *
    (k) Compliance with 40 CFR part 60, subpart VV or VVa, and 40 CFR
part 61, subpart V. Except as specified in paragraphs (k)(1) and (2) of
this section, after the compliance date specified in Sec.  63.2445, if
you have an affected source with equipment that is also subject to the
requirements of 40 CFR part 60, subpart VV or VVa, or 40 CFR part 61,
subpart V, you may elect to apply this subpart to all such equipment.
After the compliance date specified in Sec.  63.2445, if you have an
affected source with equipment to which this subpart does not apply,
but which is subject to the requirements of 40 CFR part 60, subpart VV
or VVa, or 40 CFR part 61, subpart V, you may elect to apply this
subpart to all such equipment. If you elect either of the methods of
compliance in this paragraph (k), you must consider all total organic
compounds, minus methane and ethane, in such equipment for purposes of
compliance with this subpart, as if they were organic HAP. Compliance
with the provisions of this subpart, in the manner described in this
paragraph (k), will constitute compliance with 40 CFR part 60, subpart
VV or VVa, and 40 CFR part 61, subpart V, as applicable.
    (1) The provision in Sec.  63.2480(b)(4) does not apply to
connectors in gas/vapor and light liquid service that are subject to
monitoring under 40 CFR 60.482-11a if complying with the compliance
option in this paragraph (k).
    (2) Beginning no later than the compliance dates specified in Sec.
63.2445(g), equipment that must be controlled according to this subpart
and subpart VVa of 40 CFR part 60 is required only to comply with the
equipment leak requirements of this subpart, except you must also
comply with the calibration drift assessment requirements specified at
40 CFR 60.485a(b)(2) if they are required to do so in subpart VVa of 40
CFR part 60. When complying with the calibration drift assessment
requirements at 40 CFR 60.485a(b)(2), the requirement at 40 CFR
60.486a(e)(8)(v) to record the instrument reading for each scale used
applies.
* * * * *
    (m) Overlap of this subpart with other regulations for flares. (1)
Beginning no later than the compliance dates specified in Sec.
63.2445(g), flares that control ethylene oxide emissions from affected
sources in ethylene oxide service as defined in Sec.  63.2550 or are
used to control emissions from MCPUs that produce olefins and
polyolefins, subject to the provisions of 40 CFR

60.18 or 63.11, and used as a control device for an emission point
subject to the emission limits and work practice standards in Tables 1,
2, 4 or 5 to this subpart are required to comply only with the
provisions specified in Sec.  63.2450(e)(5). At any time before the
compliance dates specified in Sec.  63.2445(g), flares that are subject
to the provisions of 40 CFR 60.18 or 63.11 and elect to comply with the
requirements in Sec.  63.2450(e)(5) are required to comply only with
the provisions specified in this subpart. For purposes of compliance
with this paragraph (m), ``MCPUs that produces olefins or polyolefins''
includes only those MCPUs that manufacture ethylene, propylene,
polyethylene, and/or polypropylene as a product. By-products and
impurities as defined in Sec.  63.101, as well as wastes and trace
contaminants, are not considered products.
    (2) Beginning no later than the compliance dates specified in Sec.
63.2445(g), flares subject to Sec.  63.987 and used as a control device
for an emission point subject to the emission limits and work practice
standards in Tables 1, 2, 4 or 5 to this subpart are only required to
comply with Sec.  63.2450(e)(5).
    (3) Beginning no later than the compliance dates specified in Sec.
63.2445(g), flares subject to the requirements in subpart CC of this
part and used as a control device for an emission point subject to the
emission limits and work practice standards in Tables 1, 2, 4 or 5 to
this subpart are only required to comply with the flare requirements in
subpart CC of this part. This paragraph (m)(3) does not apply to multi-
point pressure assisted flares.

0
23. Section 63.2545 is amended by revising paragraph (b) introductory
text and adding paragraph (b)(5) to read as follows:

Sec.  63.2545  Who implements and enforces this subpart?

* * * * *
    (b) In delegating implementation and enforcement authority of this
subpart to a state, local, or tribal agency under subpart E of this
part, the authorities contained in paragraphs (b)(1) through (5) of
this section are retained by the Administrator of U.S. EPA and are not
delegated to the state, local, or tribal agency.
* * * * *
    (5) Approval of an alternative to any electronic reporting to the
EPA required by this subpart.

0
24. Section 63.2550 is amended in paragraph (i) by:
0
a. Revising paragraphs (4) and (8) in the definition of ``Batch process
vent'';
0
b. Adding, in alphabetical order, definitions for ``Bench-scale
process'' and ``Breakthrough'';
0
c. Adding paragraphs (8), (9), (10), and (11) in the definition of
``Continuous process vent'';
0
d. Revising paragraph (3) in the definition of ``Deviation'';
0
e. Adding, in alphabetical order, definitions for ``Force majeure,''
``Heat exchange system,'' ``In ethylene oxide service,'' and ``Loading
rack'';
0
f. Revising paragraph (6) in the definition of ``Miscellaneous organic
chemical manufacturing process''; and
0
g. Adding, in alphabetical order, definitions for ``Pressure release,''
``Pressure relief device,'' ``Pressure vessel,'' ``Relief valve,'' and
``Thermal expansion relief valve.''
    The revisions and additions read as follows:

Sec.  63.2550  What definitions apply to this subpart?

* * * * *
    (i) * * *
    Batch process vent * * *
    (4) Gaseous streams routed to a fuel gas system(s) unless on and
after August 12, 2023, the fuel gas system(s) supplies a flare of which
50 percent or more of the fuel gas burned in the flare is derived from
an MCPU that has processes and/or equipment in ethylene oxide service,
or produces olefins or polyolefins;
* * * * *
    (8) Except for batch process vents in ethylene oxide service,
emission streams from emission episodes that are undiluted and
uncontrolled containing less than 50 ppmv HAP are not part of any batch
process vent. A vent from a unit operation, or a vent from multiple
unit operations that are manifolded together, from which total
uncontrolled HAP emissions are less than 200 lb/yr is not a batch
process vent; emissions for all emission episodes associated with the
unit operation(s) must be included in the determination of the total
mass emitted. The HAP concentration or mass emission rate may be
determined using any of the following: Process knowledge that no HAP
are present in the emission stream; an engineering assessment as
discussed in Sec.  63.1257(d)(2)(ii), except that you do not need to
demonstrate that the equations in Sec.  63.1257(d)(2)(i) do not apply,
and the precompliance reporting requirements specified in Sec.
63.1257(d)(2)(ii)(E) do not apply for the purposes of this
demonstration; equations specified in Sec.  63.1257(d)(2)(i), as
applicable; test data using Method 18 of 40 CFR part 60, appendix A; or
any other test method that has been validated according to the
procedures in EPA Method 301 of appendix A to this part.
    Bench-scale process means a process (other than a research and
development facility) that is operated on a small scale, such as one
capable of being located on a laboratory bench top. This bench-scale
equipment will typically include reagent feed vessels, a small reactor
and associated product separator, recovery and holding equipment. These
processes are only capable of producing small quantities of product.
* * * * *
    Breakthrough means the time when the level of HAP or TOC, measured
at the outlet of the first bed, has been detected is at the highest
concentration allowed to be discharged from the adsorber system and
indicates that the adsorber bed should be replaced.
* * * * *
    Continuous process vent * * *
    (8) On and after August 12, 2023, Sec.  63.107(h)(3) applies unless
the fuel gas system supplies a flare of which 50 percent or more of the
fuel gas burned in the flare is derived from an MCPU that has processes
and/or equipment in ethylene oxide service, or produces olefins or
polyolefins.
    (9) On and after August 12, 2023, Sec.  63.107(h)(9) no longer
applies.
    (10) On and after August 12, 2023, Sec.  63.107(i) no longer
applies. Instead, a process vent is the point of discharge to the
atmosphere (or the point of entry into a control device, if any) of a
gas stream if the gas stream meets the criteria specified in this
paragraph. The gas stream would meet the characteristics specified in
Sec.  63.107(b) through (g) of subpart F, but, for purposes of avoiding
applicability, has been deliberately interrupted, temporarily
liquefied, routed through any item of equipment for no process purpose,
or disposed of in a flare that does not meet the criteria in Sec.
63.11(b) of subpart A or Sec.  63.2450(e)(5) as applicable, or an
incinerator that does not reduce emissions of organic HAP by 98 percent
or to a concentration of 20 parts per million by volume, whichever is
less stringent.
    (11) Section 63.107(d) does not apply to continuous process vents
in ethylene oxide service.
* * * * *
    Deviation * * *
    (3) Before August 12, 2023, fails to meet any emission limit,
operating limit, or work practice standard in this subpart during
startup, shutdown, or

malfunction, regardless of whether or not such failure is permitted by
this subpart. On and after August 12, 2023, this paragraph (3) no
longer applies.
* * * * *
    Force majeure event means a release of HAP, either directly to the
atmosphere from a pressure relief device or discharged via a flare,
that is demonstrated to the satisfaction of the Administrator to result
from an event beyond the owner or operator's control, such as natural
disasters; acts of war or terrorism; loss of a utility external to the
MCPU (e.g., external power curtailment), excluding power curtailment
due to an interruptible service agreement; and fire or explosion
originating at a near or adjoining facility outside of the
miscellaneous organic chemical manufacturing process unit that impacts
the miscellaneous organic chemical manufacturing process unit's ability
to operate.
* * * * *
    Heat exchange system means a device or collection of devices used
to transfer heat from process fluids to water without intentional
direct contact of the process fluid with the water (i.e., non-contact
heat exchanger) and to transport and/or cool the water in a closed-loop
recirculation system (cooling tower system) or a once-through system
(e.g., river or pond water). For closed-loop recirculation systems, the
heat exchange system consists of a cooling tower, all miscellaneous
organic chemical manufacturing process unit heat exchangers that are in
organic HAP service, as defined in this subpart, serviced by that
cooling tower, and all water lines to and from these miscellaneous
organic chemical manufacturing process unit heat exchangers. For once-
through systems, the heat exchange system consists of all heat
exchangers that are in organic HAP service, as defined in this subpart,
servicing an individual miscellaneous organic chemical manufacturing
process unit and all water lines to and from these heat exchangers.
Sample coolers or pump seal coolers are not considered heat exchangers
for the purpose of this definition and are not part of the heat
exchange system. Intentional direct contact with process fluids results
in the formation of a wastewater.
* * * * *
    In ethylene oxide service means the following:
    (1) For equipment leaks, any equipment that contains or contacts a
fluid (liquid or gas) that is at least 0.1 percent by weight of
ethylene oxide. If information exists that suggests ethylene oxide
could be present in equipment, the equipment is considered to be ``in
ethylene oxide service'' unless sampling and analysis is performed as
specified in Sec.  63.2492 to demonstrate that the equipment does not
meet the definition of being ``in ethylene oxide service''. Examples of
information that could suggest ethylene oxide could be present in
equipment, include calculations based on safety data sheets, material
balances, process stoichiometry, or previous test results provided the
results are still relevant to the current operating conditions.
    (2) For process vents, each batch and continuous process vent in a
process that, when uncontrolled, contains a concentration of greater
than or equal to 1 ppmv undiluted ethylene oxide, and when combined,
the sum of all these process vents would emit uncontrolled ethylene
oxide emissions greater than or equal to 5 lb/yr (2.27 kg/yr). If
information exists that suggests ethylene oxide could be present in a
batch or continuous process vent, then the batch or continuous process
vent is considered to be ``in ethylene oxide service'' unless an
analysis is performed as specified in Sec.  63.2492 to demonstrate that
the batch or continuous process vent does not meet the definition of
being ``in ethylene oxide service''. Examples of information that could
suggest ethylene oxide could be present in a batch or continuous
process vent, include calculations based on safety data sheets,
material balances, process stoichiometry, or previous test results
provided the results are still relevant to the current operating
conditions.
    (3) For storage tanks, storage tanks of any capacity and vapor
pressure storing a liquid that is at least 0.1 percent by weight of
ethylene oxide. If knowledge exists that suggests ethylene oxide could
be present in a storage tank, then the storage tank is considered to be
``in ethylene oxide service'' unless sampling and analysis is performed
as specified in Sec.  63.2492 to demonstrate that the storage tank does
not meet the definition of being ``in ethylene oxide service''. The
exemptions for ``vessels storing organic liquids that contain HAP only
as impurities'' and ``pressure vessels designed to operate in excess of
204.9 kilopascals and without emissions to the atmosphere'' listed in
the definition of ``storage tank'' in this section do not apply for
storage tanks that may be in ethylene oxide service. Examples of
information that could suggest ethylene oxide could be present in a
storage tank, include calculations based on safety data sheets,
material balances, process stoichiometry, or previous test results
provided the results are still relevant to the current operating
conditions.
* * * * *
    Loading rack means a single system used to fill tank trucks and
railcars at a single geographic site. Loading equipment and operations
that are physically separate (i.e., do not share common piping, valves,
and other equipment) are considered to be separate loading racks.
* * * * *
    Miscellaneous organic chemical manufacturing process * * *
    (6) The end of a process that produces a solid material is either
up to and including the dryer or extruder, or for a polymer production
process without a dryer or extruder, it is up to and including the die
plate or solid-state reactor, except in two cases. If the dryer,
extruder, die plate, or solid-state reactor is followed by an operation
that is designed and operated to remove HAP solvent or residual HAP
monomer from the solid, then the solvent removal operation is the last
step in the process. If the dried solid is diluted or mixed with a HAP-
based solvent, then the solvent removal operation is the last step in
the process.
* * * * *
    Pressure release means the emission of materials resulting from the
system pressure being greater than the set pressure of the pressure
relief device. This release can be one release or a series of releases
over a short time period.
    Pressure relief device means a valve, rupture disk, or similar
device used only to release an unplanned, nonroutine discharge of gas
from process equipment in order to avoid safety hazards or equipment
damage. A pressure relief device discharge can result from an operator
error, a malfunction such as a power failure or equipment failure, or
other unexpected cause. Such devices include conventional, spring-
actuated relief valves, balanced bellows relief valves, pilot-operated
relief valves, rupture disks, and breaking, buckling, or shearing pin
devices. Devices that are actuated either by a pressure of less than or
equal to 2.5 pounds per square inch gauge or by a vacuum are not
pressure relief devices.
    Pressure vessel means a storage vessel that is used to store
liquids or gases and is designed not to vent to the atmosphere as a
result of compression of the vapor headspace in the pressure vessel
during filling of the pressure vessel to its design capacity.
* * * * *

    Relief valve means a type of pressure relief device that is
designed to re-close after the pressure relief.
* * * * *
    Thermal expansion relief valve means a pressure relief valve
designed to protect equipment from excess pressure due to thermal
expansion of blocked liquid-filled equipment or piping due to ambient
heating or heat from a heat tracing system. Pressure relief valves
designed to protect equipment from excess pressure due to blockage
against a pump or compressor or due to fire contingency are not thermal
expansion relief valves.
* * * * *

0
25. Table 1 to subpart FFFF of part 63 is revised to read as follows:
    As required in Sec.  63.2455, you must meet each emission limit and
work practice standard in the following table that applies to your
continuous process vents:

  Table 1 to Subpart FFFF of Part 63--Emission Limits and Work Practice Standards for Continuous Process Vents
----------------------------------------------------------------------------------------------------------------
           For each . . .                  For which . . .                      Then you must . . .
----------------------------------------------------------------------------------------------------------------
1. Group 1 continuous process vent.  a. Not applicable..........  i. Reduce emissions of total organic HAP by
                                                                   >=98 percent by weight or to an outlet
                                                                   process concentration <=20 ppmv as organic
                                                                   HAP or TOC by venting emissions through a
                                                                   closed-vent system to any combination of
                                                                   control devices (except a flare); or
                                                                  ii. Reduce emissions of total organic HAP by
                                                                   venting emissions through a closed vent
                                                                   system to a flare; or
                                                                  iii. Use a recovery device to maintain the TRE
                                                                   above 1.9 for an existing source or above 5.0
                                                                   for a new source.
2. Halogenated Group 1 continuous    a. You use a combustion      i. Use a halogen reduction device after the
 process vent stream.                 control device to control    combustion device to reduce emissions of
                                      organic HAP emissions.       hydrogen halide and halogen HAP by >=99
                                                                   percent by weight, or to <=0.45 kg/hr, or to
                                                                   <=20 ppmv; or
                                                                  ii. Use a halogen reduction device before the
                                                                   combustion device to reduce the halogen atom
                                                                   mass emission rate to <=0.45 kg/hr or to a
                                                                   concentration <=20 ppmv.
3. Group 2 continuous process vent   You use a recovery device    Comply with the requirements in Sec.
 at an existing source.               to maintain the TRE level    63.2450(e)(4) and the requirements in Sec.
                                      >1.9 but <=5.0.              63.993 and the requirements referenced
                                                                   therein.
4. Group 2 continuous process vent   You use a recovery device    Comply with the requirements in Sec.
 at a new source.                     to maintain the TRE level    63.2450(e)(4) and the requirements in Sec.
                                      >5.0 but <=8.0.              63.993 and the requirements referenced
                                                                   therein.
5. Continuous process vent.........  Beginning no later than the  Comply with the applicable emission limits
                                      compliance dates specified   specified in items 1 through 4 of this Table,
                                      in Sec.   63.2445(i), the    and also:
                                      continuous process vent     i. Reduce emissions of ethylene oxide by
                                      contains ethylene oxide      venting emissions through a closed-vent
                                      such that it is considered   system to a flare; or
                                      to be in ethylene oxide     ii. Reduce emissions of ethylene oxide by
                                      service as defined in Sec.   venting emissions through a closed-vent
                                        63.2550.                   system to a control device that reduces
                                                                   ethylene oxide by >=99.9 percent by weight,
                                                                   or to a concentration <1 ppmv for each
                                                                   process vent or to <5 pounds per year for all
                                                                   combined process vents.
----------------------------------------------------------------------------------------------------------------

0
26. Table 2 to subpart FFFF of part 63 is revised to read as follows:
    As required in Sec.  63.2460, you must meet each emission limit and
work practice standard in the following table that applies to your
batch process vents:

     Table 2 to Subpart FFFF of Part 63--Emission Limits and Work Practice Standards for Batch Process Vents
----------------------------------------------------------------------------------------------------------------
       For each . . .                    Then you must . . .                       And you must . . .
----------------------------------------------------------------------------------------------------------------
1. Process with Group 1       a. Reduce collective uncontrolled         Not applicable.
 batch process vents.          organic HAP emissions from the sum of
                               all batch process vents within the
                               process by >=98 percent by weight by
                               venting emissions from a sufficient
                               number of the vents through one or more
                               closed-vent systems to any combination
                               of control devices (except a flare); or
                              b. Reduce collective uncontrolled         Not applicable.
                               organic HAP emissions from the sum of
                               all batch process vents within the
                               process by >=95 percent by weight by
                               venting emissions from a sufficient
                               number of the vents through one or more
                               closed-vent systems to any combination
                               of recovery devices or a biofilter,
                               except you may elect to comply with the
                               requirements of subpart WW of this part
                               for any process tank; or

                              c. Reduce uncontrolled organic HAP        For all other batch process vents within
                               emissions from one or more batch          the process, reduce collective organic
                               process vents within the process by       HAP emissions as specified in item 1.a
                               venting through a closed-vent system to   and/or item 1.b of this Table.
                               a flare or by venting through one or
                               more closed-vent systems to any
                               combination of control devices
                               (excluding a flare) that reduce organic
                               HAP to an outlet concentration <=20
                               ppmv as TOC or total organic HAP.
2. Halogenated Group 1 batch  a. Use a halogen reduction device after   i. Reduce overall emissions of hydrogen
 process vent for which you    the combustion control device; or         halide and halogen HAP by >=99 percent;
 use a combustion device to                                              or
 control organic HAP                                                    ii. Reduce overall emissions of hydrogen
 emissions.                                                              halide and halogen HAP to <=0.45 kg/hr;
                                                                         or
                                                                        iii. Reduce overall emissions of
                                                                         hydrogen halide and halogen HAP to a
                                                                         concentration <=20 ppmv.
                              b. Use a halogen reduction device before  Reduce the halogen atom mass emission
                               the combustion control device.            rate to <=0.45 kg/hr or to a
                                                                         concentration <=20 ppmv.
3. Batch process vent that    Beginning no later than the compliance    Not applicable.
 contains ethylene oxide       dates specified in Sec.   63.2445(i),
 such that it is considered    comply with the applicable emission
 to be in ethylene oxide       limits specified in items 1 and 2 of
 service as defined in Sec.    this Table, and also:
  63.2550.                    i. Reduce emissions of ethylene oxide by
                               venting emissions through a closed-vent
                               system to a flare; or.
                              ii. Reduce emissions of ethylene oxide
                               by venting emissions through a closed-
                               vent system to a control device that
                               reduces ethylene oxide by >=99.9
                               percent by weight, or to a
                               concentration <1 ppmv for each process
                               vent or to <5 pounds per year for all
                               combined process vents..
----------------------------------------------------------------------------------------------------------------

0
27. Table 4 to subpart FFFF of part 63 is revised to read as follows:
    As required in Sec.  63.2470, you must meet each emission limit in
the following table that applies to your storage tanks:

                      Table 4 to Subpart FFFF of Part 63--Emission Limits for Storage Tanks
----------------------------------------------------------------------------------------------------------------
           For each . . .                  For which . . .                      Then you must . . .
----------------------------------------------------------------------------------------------------------------
1. Group 1 storage tank............  a. The maximum true vapor    i. Reduce total HAP emissions by >=95 percent
                                      pressure of total HAP at     by weight or to <=20 ppmv of TOC or organic
                                      the storage temperature is   HAP and <=20 ppmv of hydrogen halide and
                                      >=76.6 kilopascals.          halogen HAP by venting emissions through a
                                                                   closed vent system to any combination of
                                                                   control devices (excluding a flare); or
                                                                  ii. Reduce total organic HAP emissions by
                                                                   venting emissions through a closed vent
                                                                   system to a flare; or
                                                                  iii. Comply with the requirements in Sec.
                                                                   63.2450(e)(4), as applicable; and reduce
                                                                   total HAP emissions by venting emissions to a
                                                                   fuel gas system or process in accordance with
                                                                   Sec.   63.982(d) and the requirements
                                                                   referenced therein.\1\
                                     b. The maximum true vapor    i. Comply with the requirements of subpart WW
                                      pressure of total HAP at     of this part, except as specified in Sec.
                                      the storage temperature is   63.2470; or
                                      <76.6 kilopascals.
                                                                  ii. Reduce total HAP emissions by >=95 percent
                                                                   by weight or to <=20 ppmv of TOC or organic
                                                                   HAP and <=20 ppmv of hydrogen halide and
                                                                   halogen HAP by venting emissions through a
                                                                   closed vent system to any combination of
                                                                   control devices (excluding a flare); or
                                                                  iii. Reduce total organic HAP emissions by
                                                                   venting emissions through a closed vent
                                                                   system to a flare; or
                                                                  iv. Comply with the requirements in Sec.
                                                                   63.2450(e)(4), as applicable; and reduce
                                                                   total HAP emissions by venting emissions to a
                                                                   fuel gas system or process in accordance with
                                                                   Sec.   63.982(d) and the requirements
                                                                   referenced therein.\1\
2. Halogenated vent stream from a    You use a combustion         Meet one of the emission limit options
 Group 1 storage tank.                control device to control    specified in Item 2.a.i or ii. in Table 1 to
                                      organic HAP emissions.       this subpart.

3. Storage tank of any capacity and  Beginning no later than the  Comply with the applicable emission limits
 vapor pressure.                      compliance dates specified   specified in items 1 and 2 of this Table, and
                                      in Sec.   63.2445(i), the    also:
                                      stored liquid contains      i. Reduce emissions of ethylene oxide by
                                      ethylene oxide such that     venting emissions through a closed-vent
                                      the storage tank is          system to a flare; or
                                      considered to be in         ii. Reduce emissions of ethylene oxide by
                                      ethylene oxide service as    venting emissions through a closed-vent
                                      defined in Sec.   63.2550.   system to a control device that reduces
                                                                   ethylene oxide by >=99.9 percent by weight,
                                                                   or to a concentration <1 ppmv for each
                                                                   storage tank vent.
----------------------------------------------------------------------------------------------------------------
\1\ Beginning no later than the compliance dates specified in Sec.   63.2445(g), any flare using fuel gas from a
  fuel gas system, of which 50 percent or more of the fuel gas is derived from an MCPU that has processes and/or
  equipment in ethylene oxide service or that produces olefins or polyolefins, as determined on an annual
  average basis, must be in compliance with Sec.   63.2450(e)(5). For purposes of compliance, an MCPU that
  ``produces olefins or polyolefins'' includes only those MCPUs that manufacture ethylene, propylene,
  polyethylene, and/or polypropylene as a product. By-products and impurities as defined in Sec.   63.101, as
  well as wastes and trace contaminants, are not considered products.

0
28. Table 5 to subpart FFFF of part 63 is revised to read as follows:
    As required in Sec.  63.2475, you must meet each emission limit and
work practice standard in the following table that applies to your
transfer racks:

  Table 5 to Subpart FFFF of Part 63--Emission Limits and Work Practice
                      Standards for Transfer Racks
------------------------------------------------------------------------
        For each . . .                       You must . . .
------------------------------------------------------------------------
1. Group 1 transfer rack.....  a. Reduce emissions of total organic HAP
                                by >=98 percent by weight or to an
                                outlet concentration <=20 ppmv as
                                organic HAP or TOC by venting emissions
                                through a closed-vent system to any
                                combination of control devices (except a
                                flare); or
                               b. Reduce emissions of total organic HAP
                                by venting emissions through a closed-
                                vent system to a flare; or
                               c. Comply with the requirements in Sec.
                                63.2450(e)(4), as applicable; and reduce
                                emissions of total organic HAP by
                                venting emissions to a fuel gas system
                                or process in accordance with Sec.
                                63.982(d) and the requirements
                                referenced therein;\1\ or
                               d. Use a vapor balancing system designed
                                and operated to collect organic HAP
                                vapors displaced from tank trucks and
                                railcars during loading and route the
                                collected HAP vapors to the storage tank
                                from which the liquid being loaded
                                originated or to another storage tank
                                connected by a common header.
2. Halogenated Group 1         a. Use a halogen reduction device after
 transfer rack vent stream      the combustion device to reduce
 for which you use a            emissions of hydrogen halide and halogen
 combustion device to control   HAP by >=99 percent by weight, to <=0.45
 organic HAP emissions.         kg/hr, or to <=20 ppmv; or
                               b. Use a halogen reduction device before
                                the combustion device to reduce the
                                halogen atom mass emission rate to
                                <=0.45 kg/hr or to a concentration <=20
                                ppmv.
------------------------------------------------------------------------
\1\ Beginning no later than the compliance dates specified in Sec.
  63.2445(g), any flare using fuel gas from a fuel gas system, of which
  50 percent or more of the fuel gas is derived from an MCPU that has
  processes and/or equipment in ethylene oxide service or that produces
  olefins or polyolefins, as determined on an annual average basis, must
  be in compliance with Sec.   63.2450(e)(5). For purposes of
  compliance, an MCPU that ``produces olefins or polyolefins'' includes
  only those MCPUs that manufacture ethylene, propylene, polyethylene,
  and/or polypropylene as a product. By-products and impurities as
  defined in Sec.   63.101, as well as wastes and trace contaminants,
  are not considered products.

0
29. Table 6 to subpart FFFF of part 63 is revised to read as follows:
    As required in Sec.  63.2480, you must meet each requirement in the
following table that applies to your equipment leaks:

                      Table 6 to Subpart FFFF of Part 63--Requirements for Equipment Leaks
----------------------------------------------------------------------------------------------------------------
           For all . . .              And that is part of . . .                   You must . . .
----------------------------------------------------------------------------------------------------------------
1. Equipment that is in organic HAP  a. Any MCPU................  i. Comply with the requirements of subpart UU
 service.                                                          of this part and the requirements referenced
                                                                   therein, except as specified in Sec.
                                                                   63.2480(b) and (d) through (f); or
                                                                  ii. Comply with the requirements of subpart H
                                                                   of this part and the requirements referenced
                                                                   therein, except as specified in Sec.
                                                                   63.2480(b) and (d) through (f); or
                                                                  iii. Comply with the requirements of 40 CFR
                                                                   part 65, subpart F, and the requirements
                                                                   referenced therein, except as specified in
                                                                   Sec.   63.2480(c), and (d) through (f).
2. Equipment that is in organic HAP  a. Any MCPU................  i. Comply with the requirements of subpart UU
 service at a new source.                                          of this part and the requirements referenced
                                                                   therein, except as specified in Sec.
                                                                   63.2480(b)(6) and (7), (e), and (f); or
                                                                  ii. Comply with the requirements of 40 CFR
                                                                   part 65, subpart F, except as specified in
                                                                   Sec.   63.2480(c)(10) and (11), (e), and (f).
3. Equipment that is in ethylene     a. Any MCPU................  i. Beginning no later than the compliance
 oxide service as defined in Sec.                                  dates specified in Sec.   63.2445(i), comply
 63.2550.                                                          with the requirements of subpart UU of this
                                                                   part and the requirements referenced therein,
                                                                   except as specified in Sec.   63.2493(d) and
                                                                   (e); or

                                                                  ii. Beginning no later than the compliance
                                                                   dates specified in Sec.   63.2445(i), comply
                                                                   with the requirements of subpart H of this
                                                                   part and the requirements referenced therein,
                                                                   except as specified in Sec.   63.2493(d) and
                                                                   (e);
                                                                  iii. Beginning no later than the compliance
                                                                   dates specified in Sec.   63.2445(i), comply
                                                                   with the requirements of 40 CFR part 65,
                                                                   subpart F, and the requirements referenced
                                                                   therein, except as specified in Sec.
                                                                   63.2493(d) and (e).
----------------------------------------------------------------------------------------------------------------

0
30. Table 10 to subpart FFFF of part 63 is revised to read as follows:
    As required in Sec.  63.2490, you must meet each requirement in the
following table that applies to your heat exchange systems:

  Table 10 to Subpart FFFF of Part 63--Work Practice Standards for Heat
                            Exchange Systems
------------------------------------------------------------------------
        For each . . .                       You must . . .
------------------------------------------------------------------------
Heat exchange system, as       a. Comply with the requirements of Sec.
 defined in Sec.   63.101.      63.104 and the requirements referenced
                                therein, except as specified in Sec.
                                63.2490(b) and (c); or
                               b. Comply with the requirements in Sec.
                                63.2490(d).
------------------------------------------------------------------------

0
31. Table 12 to subpart FFFF of part 63 is revised to read as follows:
    As specified in Sec.  63.2540, the parts of the general provisions
that apply to you are shown in the following table:

Table 12 to Subpart FFFF of Part 63--Applicability of General Provisions
                             to Subpart FFFF
------------------------------------------------------------------------
          Citation                   Subject             Explanation
------------------------------------------------------------------------
Sec.   63.1.................  Applicability.......  Yes.
Sec.   63.2.................  Definitions.........  Yes.
Sec.   63.3.................  Units and             Yes.
                               Abbreviations.
Sec.   63.4.................  Prohibited            Yes.
                               Activities.
Sec.   63.5.................  Construction/         Yes.
                               Reconstruction.
Sec.   63.6(a)..............  Applicability.......  Yes.
Sec.   63.6(b)(1)-(4).......  Compliance Dates for  Yes.
                               New and
                               Reconstructed
                               sources.
Sec.   63.6(b)(5)...........  Notification........  Yes.
Sec.   63.6(b)(6)...........  [Reserved]..........  ....................
Sec.   63.6(b)(7)...........  Compliance Dates for  Yes.
                               New and
                               Reconstructed Area
                               Sources That Become
                               Major.
Sec.   63.6(c)(1)-(2).......  Compliance Dates for  Yes.
                               Existing Sources.
Sec.   63.6(c)(3)-(4).......  [Reserved]..........  ....................
Sec.   63.6(c)(5)...........  Compliance Dates for  Yes.
                               Existing Area
                               Sources That Become
                               Major.
Sec.   63.6(d)..............  [Reserved]..........  ....................
Sec.   63.6(e)(1)(i)........  Operation &           Yes, before August
                               Maintenance.          12, 2023.
                                                    No, beginning on and
                                                     after August 12,
                                                     2023. See Sec.
                                                     63.2450(u) for
                                                     general duty
                                                     requirement.
Sec.   63.6(e)(1)(ii).......  Operation &           Yes, before August
                               Maintenance.          12, 2023.
                                                    No, beginning on and
                                                     after August 12,
                                                     2023.
Sec.   63.6(e)(1)(iii)......  Operation &           Yes.
                               Maintenance.
Sec.   63.6(e)(2)...........  [Reserved]..........  ....................
Sec.   63.6(e)(3)(i), (iii),  Startup, Shutdown,    Yes, before August
 and (v) through (viii).       Malfunction Plan      12, 2023, except
                               (SSMP).               information
                                                     regarding Group 2
                                                     emission points and
                                                     equipment leaks is
                                                     not required in the
                                                     SSMP, as specified
                                                     in Sec.
                                                     63.2525(j). No,
                                                     beginning on and
                                                     after August 12,
                                                     2023.
Sec.   63.6(e)(3)(iii) and    Recordkeeping and     No, see Sec.
 (iv).                         Reporting During      63.2525 for
                               SSM.                  recordkeeping
                                                     requirements and
                                                     Sec.
                                                     63.2520(e)(4) for
                                                     reporting
                                                     requirements.
Sec.   63.6(e)(3)(ix).......  SSMP incorporation    Yes, before August
                               into title V permit.  12, 2023. No
                                                     beginning on and
                                                     after August 12,
                                                     2023.
Sec.   63.6(f)(1)...........  Compliance With Non-  No. See Sec.
                               Opacity Standards     63.2445(g) through
                               Except During SSM.    (i).
Sec.   63.6(f)(2)-(3).......  Methods for           Yes.
                               Determining
                               Compliance.
Sec.   63.6(g)(1)-(3).......  Alternative Standard  Yes.
Sec.   63.6(h)(1)...........  Compliance with       No. See Sec.
                               Opacity Standards     63.2445(g) through
                               Except During SSM.    (i).

Sec.   63.6(h)(2)-(9).......  Opacity/Visible       Only for flares for
                               Emission (VE)         which Method 22 of
                               Standards.            40 CFR part 60,
                                                     appendix A-7,
                                                     observations are
                                                     required as part of
                                                     a flare compliance
                                                     assessment.
Sec.   63.6(i)(1)-(14), and   Compliance Extension  Yes.
 (16).
Sec.   63.6(j)..............  Presidential          Yes.
                               Compliance
                               Exemption.
Sec.   63.7(a)(1)-(2).......  Performance Test      Yes, except
                               Dates.                substitute 150 days
                                                     for 180 days.
Sec.   63.7(a)(3)...........  Section 114           Yes, and this
                               Authority.            paragraph also
                                                     applies to flare
                                                     compliance
                                                     assessments as
                                                     specified under
                                                     Sec.
                                                     63.997(b)(2).
Sec.   63.7(a)(4)...........  Force Majeure.......  Yes.
Sec.   63.7(b)(1)...........  Notification of       Yes.
                               Performance Test.
Sec.   63.7(b)(2)...........  Notification of       Yes.
                               Rescheduling.
Sec.   63.7(c)..............  Quality Assurance/    Yes, except the test
                               Test Plan.            plan must be
                                                     submitted with the
                                                     notification of the
                                                     performance test if
                                                     the control device
                                                     controls batch
                                                     process vents.
Sec.   63.7(d)..............  Testing Facilities..  Yes.
Sec.   63.7(e)(1)...........  Conditions for        Yes, before August
                               Conducting            12, 2023 except
                               Performance Tests.    that performance
                                                     tests for batch
                                                     process vents must
                                                     be conducted under
                                                     worst-case
                                                     conditions as
                                                     specified in Sec.
                                                     63.2460. No,
                                                     beginning on and
                                                     after August 12,
                                                     2023. See Sec.
                                                     63.2450(g)(6).
Sec.   63.7(e)(2)...........  Conditions for        Yes.
                               Conducting
                               Performance Tests.
Sec.   63.7(e)(3)...........  Test Run Duration...  Yes.
Sec.   63.7(e)(4)...........  Administrator's       Yes.
                               Authority to
                               Require Testing.
Sec.   63.7(f)..............  Alternative Test      Yes.
                               Method.
Sec.   63.7(g)..............  Performance Test      Yes, except this
                               Data Analysis.        subpart specifies
                                                     how and when the
                                                     performance test
                                                     and performance
                                                     evaluation results
                                                     are reported.
Sec.   63.7(h)..............  Waiver of Tests.....  Yes.
Sec.   63.8(a)(1)...........  Applicability of      Yes.
                               Monitoring
                               Requirements.
Sec.   63.8(a)(2)...........  Performance           Yes.
                               Specifications.
Sec.   63.8(a)(3)...........  [Reserved]..........  ....................
Sec.   63.8(a)(4)...........  Monitoring with       Yes, except for
                               Flares.               flares subject to
                                                     Sec.
                                                     63.2450(e)(5).
Sec.   63.8(b)(1)...........  Monitoring..........  Yes.
Sec.   63.8(b)(2)-(3).......  Multiple Effluents    Yes.
                               and Multiple
                               Monitoring Systems.
Sec.   63.8(c)(1)...........  Monitoring System     Yes.
                               Operation and
                               Maintenance.
Sec.   63.8(c)(1)(i)........  Routine and           Yes, before August
                               Predictable SSM.      12, 2023. No,
                                                     beginning on and
                                                     after August 12,
                                                     2023.
Sec.   63.8(c)(1)(ii).......  CMS malfunction not   Yes.
                               in SSM plan.
Sec.   63.8(c)(1)(iii)......  Compliance with       Yes, before August
                               Operation and         12, 2023. No,
                               Maintenance           beginning on and
                               Requirements.         after August 12,
                                                     2023.
Sec.   63.8(c)(2)-(3).......  Monitoring System     Yes.
                               Installation.
Sec.   63.8(c)(4)...........  CMS Requirements....  Only for CEMS.
                                                     Requirements for
                                                     CPMS are specified
                                                     in referenced
                                                     subparts G and SS
                                                     of this part.
                                                     Requirements for
                                                     COMS do not apply
                                                     because this
                                                     subpart does not
                                                     require continuous
                                                     opacity monitoring
                                                     systems (COMS).
Sec.   63.8(c)(4)(i)........  COMS Measurement and  No; this subpart
                               Recording Frequency.  does not require
                                                     COMS.
Sec.   63.8(c)(4)(ii).......  CEMS Measurement and  Yes.
                               Recording Frequency.
Sec.   63.8(c)(5)...........  COMS Minimum          No. This subpart
                               Procedures.           does not contain
                                                     opacity or VE
                                                     limits.
Sec.   63.8(c)(6)...........  CMS Requirements....  Only for CEMS;
                                                     requirements for
                                                     CPMS are specified
                                                     in referenced
                                                     subparts G and SS
                                                     of this part.
                                                     Requirements for
                                                     COMS do not apply
                                                     because this
                                                     subpart does not
                                                     require COMS.
Sec.   63.8(c)(7)-(8).......  CMS Requirements....  Only for CEMS.
                                                     Requirements for
                                                     CPMS are specified
                                                     in referenced
                                                     subparts G and SS
                                                     of this part.
                                                     Requirements for
                                                     COMS do not apply
                                                     because this
                                                     subpart does not
                                                     require COMS.
Sec.   63.8(d)(1)...........  CMS Quality Control.  Only for CEMS.
Sec.   63.8(d)(2)...........  CMS Quality Control.  Only for CEMS.
Sec.   63.8(d)(3)...........  CMS Quality Control.  Yes, only for CEMS
                                                     before August 12,
                                                     2023. No, beginning
                                                     on and after August
                                                     12, 2023. See Sec.
                                                      63.2450(j)(6).
Sec.   63.8(e)..............  CMS Performance       Only for CEMS,
                               Evaluation.           except this subpart
                                                     specifies how and
                                                     when the
                                                     performance
                                                     evaluation results
                                                     are reported.
                                                     Section
                                                     63.8(e)(5)(ii) does
                                                     not apply because
                                                     this subpart does
                                                     not require COMS.
Sec.   63.8(f)(1)-(5).......  Alternative           Yes, except you may
                               Monitoring Method.    also request
                                                     approval using the
                                                     precompliance
                                                     report.
Sec.   63.8(f)(6)...........  Alternative to        Only applicable when
                               Relative Accuracy     using CEMS to
                               Test.                 demonstrate
                                                     compliance,
                                                     including the
                                                     alternative
                                                     standard in Sec.
                                                     63.2505.

Sec.   63.8(g)(1)-(4).......  Data Reduction......  Only when using
                                                     CEMS, including for
                                                     the alternative
                                                     standard in Sec.
                                                     63.2505, except
                                                     that the
                                                     requirements for
                                                     COMS do not apply
                                                     because this
                                                     subpart has no
                                                     opacity or VE
                                                     limits, and Sec.
                                                     63.8(g)(2) does not
                                                     apply because data
                                                     reduction
                                                     requirements for
                                                     CEMS are specified
                                                     in Sec.
                                                     63.2450(j).
Sec.   63.8(g)(5)...........  Data Reduction......  No. Requirements for
                                                     CEMS are specified
                                                     in Sec.
                                                     63.2450(j).
                                                     Requirements for
                                                     CPMS are specified
                                                     in referenced
                                                     subparts G and SS
                                                     of this part.
Sec.   63.9(a)..............  Notification          Yes.
                               Requirements.
Sec.   63.9(b)(1)-(5).......  Initial               Yes.
                               Notifications.
Sec.   63.9(c)..............  Request for           Yes.
                               Compliance
                               Extension.
Sec.   63.9(d)..............  Notification of       Yes.
                               Special Compliance
                               Requirements for
                               New Source.
Sec.   63.9(e)..............  Notification of       Yes.
                               Performance Test.
Sec.   63.9(f)..............  Notification of VE/   No.
                               Opacity Test.
Sec.   63.9(g)..............  Additional            Only for CEMS.
                               Notifications When    Section 63.9(g)(2)
                               Using CMS.            does not apply
                                                     because this
                                                     subpart does not
                                                     require COMS.
63.9(h)(1)-(6)..............  Notification of       Yes, except Sec.
                               Compliance Status.    63.9(h)(2)(i)(A)
                                                     through (G) and
                                                     (h)(2)(ii) do not
                                                     apply because Sec.
                                                      63.2520(d)
                                                     specifies the
                                                     required contents
                                                     and due date of the
                                                     notification of
                                                     compliance status
                                                     report.
Sec.   63.9(i)..............  Adjustment of         Yes.
                               Submittal Deadlines.
Sec.   63.9(j)..............  Change in Previous    No, Sec.
                               Information.          63.2520(e)
                                                     specifies reporting
                                                     requirements for
                                                     process changes.
Sec.   63.10(a).............  Recordkeeping/        Yes.
                               Reporting.
Sec.   63.10(b)(1)..........  Recordkeeping/        Yes.
                               Reporting.
Sec.   63.10(b)(2)(i).......  Records related to    No, see Sec.  Sec.
                               startup and           63.2450(e) and
                               shutdown.             63.2525 for
                                                     recordkeeping
                                                     requirements.
Sec.   63.10(b)(2)(ii)......  Recordkeeping         Yes, before August
                               relevant to SSM       12, 2023. No,
                               periods and CMS.      beginning on and
                                                     after August 12,
                                                     2023. See Sec.
                                                     63.2525(h) and (l).
Sec.   63.10(b)(2)(iii).....  Records related to    Yes.
                               maintenance of air
                               pollution control
                               equipment.
Sec.   63.10(b)(2)(iv) and    Recordkeeping         Yes, before August
 (v).                          relevant to SSM       12, 2023. No,
                               period.               beginning on and
                                                     after August 12,
                                                     2023.
Sec.   63.10(b)(2)(vi)......  CMS Records.........  Before August 12,
                                                     2023, yes but only
                                                     for CEMS;
                                                     requirements for
                                                     CPMS are specified
                                                     in referenced
                                                     subparts G and SS
                                                     of this part.
                                                     Beginning on and
                                                     after August 12,
                                                     2023, yes for CEMS
                                                     and CPMS for flares
                                                     subject to Sec.
                                                     63.2450(e)(5).
Sec.   63.10(b)(2)(x) and     CMS Records.........  Only for CEMS;
 (xi).                                               requirements for
                                                     CPMS are specified
                                                     in referenced
                                                     subparts G and SS
                                                     of this part.
Sec.   63.10(b)(2)(vii)-(ix)  Records.............  Yes.
Sec.   63.10(b)(2)(xii).....  Records.............  Yes.
Sec.   63.10(b)(2)(xiii)....  Records.............  Only for CEMS.
Sec.   63.10(b)(2)(xiv).....  Records.............  Yes.
Sec.   63.10(b)(3)..........  Records.............  Yes.
Sec.   63.10(c)(1)-(6),(9)-   Records.............  Only for CEMS.
 (14).                                               Recordkeeping
                                                     requirements for
                                                     CPMS are specified
                                                     in referenced
                                                     subparts G and SS
                                                     of this part.
Sec.   63.10(c)(7)-(8)......  Records.............  No. Recordkeeping
                                                     requirements are
                                                     specified in Sec.
                                                     63.2525.
Sec.   63.10(c)(15).........  Records.............  Yes, before August
                                                     12, 2023, but only
                                                     for CEMS. No,
                                                     beginning on and
                                                     after August 12,
                                                     2023.
Sec.   63.10(d)(1)..........  General Reporting     Yes.
                               Requirements.
Sec.   63.10(d)(2)..........  Report of             Yes, before October
                               Performance Test      13, 2020. No,
                               Results.              beginning on and
                                                     after October 13,
                                                     2020.
Sec.   63.10(d)(3)..........  Reporting Opacity or  No.
                               VE Observations.
Sec.   63.10(d)(4)..........  Progress Reports....  Yes.
Sec.   63.10(d)(5)(i).......  Periodic Startup,     No, Sec.
                               Shutdown, and         63.2520(e)(4) and
                               Malfunction Reports.  (5) specify the SSM
                                                     reporting
                                                     requirements.
Sec.   63.10(d)(5)(ii)......  Immediate SSM         No.
                               Reports.
Sec.   63.10(e)(1)..........  Additional CEMS       Yes.
                               Reports.
Sec.   63.10(e)(2)(i).......  Additional CMS        Only for CEMS,
                               Reports.              except this subpart
                                                     specifies how and
                                                     when the
                                                     performance
                                                     evaluation results
                                                     are reported.
Sec.   63.10(e)(2)(ii)......  Additional COMS       No. This subpart
                               Reports.              does not require
                                                     COMS.
Sec.   63.10(e)(3)..........  Reports.............  No. Reporting
                                                     requirements are
                                                     specified in Sec.
                                                     63.2520.
Sec.   63.10(e)(3)(i)-(iii).  Reports.............  No. Reporting
                                                     requirements are
                                                     specified in Sec.
                                                     63.2520.
Sec.   63.10(e)(3)(iv)-(v)..  Excess Emissions      No. Reporting
                               Reports.              requirements are
                                                     specified in Sec.
                                                     63.2520.
Sec.   63.10(e)(3)(iv)-(v)..  Excess Emissions      No. Reporting
                               Reports.              requirements are
                                                     specified in Sec.
                                                     63.2520.
Sec.   63.10(e)(3)(vi)-       Excess Emissions      No. Reporting
 (viii).                       Report and Summary    requirements are
                               Report.               specified in Sec.
                                                     63.2520.

Sec.   63.10(e)(4)..........  Reporting COMS data.  No.
Sec.   63.10(f).............  Waiver for            Yes.
                               Recordkeeping/
                               Reporting.
Sec.   63.11................  Control device        Yes, except for
                               requirements for      flares subject to
                               flares and work       Sec.
                               practice              63.2450(e)(5).
                               requirements for
                               equipment leaks.
Sec.   63.12................  Delegation..........  Yes.
Sec.   63.13................  Addresses...........  Yes.
Sec.   63.14................  Incorporation by      Yes.
                               Reference.
Sec.   63.15................  Availability of       Yes.
                               Information.
------------------------------------------------------------------------

[FR Doc. 2020-12776 Filed 8-11-20; 8:45 am]
BILLING CODE 6560-50-P