the heat exchange system, as provided in paragraph (d)(2) of this
section.
    (4) You may delay repair when one of the conditions in paragraph
(d)(4)(i) or (ii) of this section is met and the leak is less than the
delay of repair action level specified in paragraph (d)(4)(iii) of this
section. You must determine if a delay of repair is necessary as soon
as practicable, but no later than 45 days after first identifying the
leak.
    (i) If the repair is technically infeasible without a shutdown and
the total strippable hydrocarbon concentration is initially and remains
less than the delay of repair action level for all monitoring periods
during the delay of repair, then you may delay repair until the next
scheduled shutdown of the heat exchange system. If, during subsequent
monitoring, the delay of repair action level is exceeded, then you must
repair the leak within 30 days of the monitoring event in which the
leak was equal to or exceeded the delay of repair action level.
    (ii) If the necessary equipment, parts, or personnel are not
available and the total strippable hydrocarbon concentration is
initially and remains less than the delay of repair action level for
all monitoring periods during the delay of repair, then you may delay
the repair for a maximum of 120 calendar

days. You must demonstrate that the necessary equipment, parts, or
personnel were not available. If, during subsequent monitoring, the
delay of repair action level is exceeded, then you must repair the leak
within 30 days of the monitoring event in which the leak was equal to
or exceeded the delay of repair action level.
    (iii) The delay of repair action level is a total strippable
hydrocarbon concentration (as methane) in the stripping gas of 62 ppmv.
The delay of repair action level is assessed as described in paragraph
(d)(4)(iii)(A) or (B) of this section, as applicable.
    (A) For once-through heat exchange systems for which the inlet
water feed is monitored as described in paragraph (d)(1)(ii)(B) of this
section, the delay of repair action level is exceeded if the difference
in the measurement value of the sample taken from a location specified
in paragraph (d)(1)(ii)(A) of this section and the measurement value of
the corresponding sample taken from the location specified in paragraph
(d)(1)(ii)(B) of this section equals or exceeds the delay of repair
action level.
    (B) For all other heat exchange systems, the delay of repair action
level is exceeded if a measurement value of the sample taken from a
location specified in paragraph (d)(1)(i)(A), (B), or (d)(1)(ii)(A) of
this section equals or exceeds the delay of repair action level.
0
14. Section 63.2492 is added to read as follows:

Sec.  63.2492  How do I determine whether my process vent, storage
tank, or equipment is in ethylene oxide service?

    To determine if process vents, storage tanks, and equipment leaks
are in ethylene oxide service as defined in Sec.  63.2550(i), you must
comply with the requirements in paragraphs (a) through (c) of this
section, as applicable.
    (a) For each batch process vent or continuous process vent stream,
you must measure the flow rate and concentration of ethylene oxide of
each process vent as specified in paragraphs (a)(1) through (5) of this
section.
    (1) Measurements must be made prior to any dilution of the vent
streams.
    (2) Measurements may be made on the combined vent streams at an
MCPU or for each separate vent stream.
    (3) Method 1 or 1A of 40 CFR part 60, appendix A-1, as appropriate,
must be used for the selection of the sampling sites. For vents smaller
than 0.10 meter in diameter, sample at one point at the center of the
duct.
    (4) The gas volumetric flow rate must be determined using Method 2,
2A, 2C, 2D, 2F, or 2G of 40 CFR part 60, appendix A-1 and A-2, as
appropriate.
    (5) The concentration of ethylene oxide must be determined using
Method 18 of appendix A-6 of 40 CFR part 60 or Method 320 of appendix A
to 40 CFR part 63.
    (b) For storage tanks, you must measure the concentration of
ethylene oxide of the fluid stored in the storage tanks using Method
624.1 of 40 CFR part 136 or preparation by Method 5031 and analysis by
Method 8260D in the SW-846 Compendium. In lieu of preparation by SW-846
Method 5031, you may use SW-846 Method 5030B, as long as: You do not
use a preservative in the collected sample; you store the sample with
minimal headspace as cold as possible and at least below 4 degrees C;
and you analyze the sample as soon as possible, but in no case longer
than 7 days from the time the sample was collected. If you are
collecting a sample from a pressure vessel, you must maintain the
sample under pressure both during and following sampling.
    (c) For equipment leaks, you must comply with the requirements in
paragraphs (c)(1) through (4) of this section.
    (1) Each piece of equipment within an MCPU that can reasonably be
expected to contain equipment in ethylene oxide service is presumed to
be in ethylene oxide service unless an owner or operator demonstrates
that the piece of equipment is not in ethylene oxide service. For a
piece of equipment to be considered not in ethylene oxide service, it
must be determined that the percent ethylene oxide content of the
process fluid that is contained in or contacts equipment can be
reasonably expected to not exceed 0.1 percent by weight on an annual
average basis. For purposes of determining the percent ethylene oxide
content of the process fluid, you must use Method 18 of 40 CFR part 60,
appendix A-6 for gaseous process fluid, and Method 624.1 of 40 CFR part
136 or preparation by Method 5031 and analysis by Method 8260D in the
SW-846 Compendium for liquid process fluid. In lieu of preparation by
SW-846 Method 5031, you may use SW-846 Method 5030B, as long as: You do
not use a preservative in the collected sample; you store the sample
with minimal headspace as cold as possible and at least below 4 degrees
C; and you analyze the sample as soon as possible, but in no case
longer than 7 days from the time the sample was collected.
    (2) Unless specified by the Administrator, you may use good
engineering judgment rather than the procedures specified in paragraph
(c)(1) of this section to determine that the percent ethylene oxide
content of the process fluid that is contained in or contacts equipment
does not exceed 0.1 percent by weight.
    (3) You may revise your determination for whether a piece of
equipment is in ethylene oxide service by following the procedures in
paragraph (c)(1) of this section, or by documenting that a change in
the process or raw materials no longer causes the equipment to be in
ethylene oxide service.
    (4) Samples used in determining the ethylene oxide content must be
representative of the process fluid that is contained in or contacts
the equipment.
0
15. Section 63.2493 is added to read as follows:

Sec.  63.2493  What requirements must I meet for process vents, storage
tanks, or equipment that are in ethylene oxide service?

    This section applies beginning no later than the compliance dates
specified in Sec.  63.2445(i). In order to demonstrate compliance with
the emission limits and work practice standards specified in Tables 1,
2, and 4 to this subpart for process vents and storage tanks in
ethylene oxide service, you must meet the requirements specified in
paragraphs (a) through (c) of this section. In order to demonstrate
compliance with the requirements specified in Table 6 to this subpart
for equipment in ethylene oxide service, you must meet the requirements
specified in paragraphs (d) and (e) of this section.
    (a) For initial compliance, you must comply with paragraphs (a)(1)
through (4) of this section, as applicable.
    (1) If you choose to reduce emissions of ethylene oxide by venting
emissions through a closed-vent system to a flare as specified in table
1, 2, or 4 to this subpart, then you must comply with Sec.
63.2450(e)(4) and (6) and the requirements in Sec.  63.983, and you
must conduct the initial visible emissions demonstration required by
Sec.  63.670(h) of subpart CC as specified in Sec.  63.2450(e)(5).
    (2) If you choose to reduce emissions of ethylene oxide by venting
emissions through a closed-vent system to a non-flare control device
that reduces ethylene oxide by greater than or equal to 99.9 percent by
weight as specified in table 1, 2, or 4 to this subpart, then you must
comply with Sec.  63.2450(e)(4) and (6) and the requirements in Sec.
63.983, and you must comply with paragraphs (a)(2)(i) through (viii) of
this section.
    (i) Conduct an initial performance test of the control device that
is used to comply with the percent reduction

requirement at the inlet and outlet of the control device.
    (ii) Conduct the performance test according to the procedures in
Sec.  63.997 and Sec.  63.2450(g). Use Method 18 of appendix A-6 of 40
CFR part 60 or Method 320 of appendix A to 40 CFR part 63 to determine
the ethylene oxide concentration. Use Method 1 or 1A of appendix A-1 of
40 CFR part 60 to select the sampling sites at each sampling location.
Determine the gas volumetric flowrate using Method 2, 2A, 2C, or 2D of
appendix A-2 of 40 CFR part 60. Use Method 4 of appendix A-3 of 40 CFR
part 60 to convert the volumetric flowrate to a dry basis.
    (iii) Calculate the mass emission rate of ethylene oxide entering
the control device and exiting the control device using Equations 5 and
6 of this subpart.
[GRAPHIC] [TIFF OMITTED] TP17DE19.002

Where:
EEtO,inlet, EEtO,outlet = Mass rate of
ethylene oxide at the inlet and outlet of the control device,
respectively, kilogram per hour.
CEtO,inlet, CEtO,outlet = Concentration of
ethylene oxide in the gas stream at the inlet and outlet of the
control device, respectively, dry basis, parts per million by
volume.
MEtO = Molecular weight of ethylene oxide, 44.05 grams
per gram-mole.
Qinlet, Qoutlet = Flow rate of the gas stream
at the inlet and outlet of the control device, respectively, dry
standard cubic meter per minute.
K = Constant, 2.494 x 10-\6\ (parts per million)-1 (gram-
mole per standard cubic meter) (kilogram per gram) (minutes per
hour), where standard temperature (gram-mole per standard cubic
meter) is 20 [deg]C.

    (iv) Calculate the percent reduction from the control device using
equation 7 of this subpart. You have demonstrated initial compliance if
the overall reduction of ethylene oxide is greater than or equal to
99.9 percent by weight.

[GRAPHIC] [TIFF OMITTED] TP17DE19.003

Where:

EEtO,inlet, EEtO,outlet = Mass rate of
ethylene oxide at the inlet and outlet of the control device,
respectively, kilogram per hour, calculated using Equations 5 and 6
of this subpart.

    (v) If a new control device is installed, then conduct a
performance test of the new device following the procedures in
paragraphs (a)(2)(i) through (iv) of this section.
    (vi) If you vent emissions through a closed-vent system to a
scrubber, then you must establish operating parameter limits by
monitoring the operating parameters specified in paragraphs
(a)(2)(vi)(A) through (E) of this section during the performance test.
    (A) Scrubber liquid-to-gas ratio (L/G), determined from the total
scrubber liquid inlet flow rate and the exit gas flow rate. Determine
the average L/G during the performance test as the average of the test
run averages.
    (B) Scrubber liquid pH of the liquid in the reactant tank. The pH
may be measured at any point between the discharge from the scrubber
column and the inlet to the reactant tank. Determine the average pH
during the performance test as the average of the test run averages.
    (C) Pressure drop of the scrubber column. Determine the average
pressure drop during the performance test as the average of the test
run averages.
    (D) Temperature of the water entering the scrubber column. The
temperature may be measured at any point after the heat exchanger and
prior to entering the top of the scrubber column. Determine the average
inlet water temperature as the average of the test run averages.
    (E) Liquid feed pressure to the wet scrubber column. Determine the
average liquid feed pressure as the average of the test run averages.
    (vii) If you vent emissions through a closed-vent system to a
thermal oxidizer, then you must establish operating parameter limits by
monitoring the operating parameters specified in paragraphs
(a)(2)(vii)(A) and (B) of this section during the performance test.
    (A) Combustion chamber temperature. Determine the average
combustion chamber temperature during the performance test as the
average of the test run averages.
    (B) Flue gas flow rate. Determine the average flue gas flow rate
during the performance test as the average of the test run averages.
    (viii) If you vent emissions through a closed-vent system to a
control device other than a flare, scrubber, or thermal oxidizer, then
you must notify the Administrator of the operating parameters that you
plan to monitor during the performance test prior to establishing
operating parameter limits for the control device.
    (3) If you choose to reduce emissions of ethylene oxide by venting
emissions through a closed-vent system to a non-flare control device
that reduces ethylene oxide to less than 1 ppmv as specified in table
1, 2, or 4 to this subpart, then you must comply with Sec.
63.2450(e)(4) and (6) and the requirements in Sec.  63.983, and you
must comply with either paragraph (a)(3)(i) or (ii) of this section.
    (i) Install an FTIR CEMS meeting the requirements of Performance
Specification 15 to continuously monitor the ethylene oxide
concentration at the exit of the control device. Comply with the
requirements specified in Sec.  63.2450(j) for your CEMS.
    (ii) If you do not install a CEMS under paragraph (a)(3)(i) of this
section, you must comply with paragraphs (a)(3)(ii)(A) through (C) of
this section.
    (A) Conduct an initial performance test of the control device that
is used to comply with the concentration requirement at the outlet of
the control device.
    (B) Conduct the performance test according to the procedures in
Sec.  63.997 and Sec.  63.2450(g). Use Method 18 of appendix A-6 of 40
CFR part 60 or Method 320 of appendix A to 40 CFR part 63 to determine
the ethylene oxide concentration. You have demonstrated initial
compliance if the ethylene oxide concentration is less than 1 ppmv.
    (C) Comply with the requirements specified in paragraphs (a)(2)(v)
through (viii) of this section, as applicable.
    (4) If you choose to reduce emissions of ethylene oxide by venting
emissions through a closed-vent system to a non-flare control device
that reduces ethylene oxide to less than 5 pounds per year for all
combined process vents as specified in table 1 or 2 to this subpart,
then you must comply with

Sec.  63.2450(e)(4) and (6) and the requirements in Sec.  63.983, and
you must comply with paragraphs (a)(4)(i) through (iv) of this section.
    (i) Conduct an initial performance test of the control device that
is used to comply with the mass emission limit requirement at the
outlet of the control device.
    (ii) Conduct the performance test according to the procedures in
Sec.  63.997 and Sec.  63.2450(g). Use Method 18 of appendix A-6 of 40
CFR part 60 or Method 320 of appendix A to 40 CFR part 63 to determine
the ethylene oxide concentration. Use Method 1 or 1A of appendix A-1 of
40 CFR part 60 to select the sampling site. Determine the gas
volumetric flowrate using Method 2, 2A, 2C, or 2D of appendix A-2 of 40
CFR part 60. Use Method 4 of appendix A-3 of 40 CFR part 60 to convert
the volumetric flowrate to a dry basis.
    (iii) Calculate the mass emission rate of ethylene oxide exiting
the control device using Equation 6 of this subpart. You have
demonstrated initial compliance if the ethylene oxide from all process
vents (controlled and uncontrolled) is less than 5 pounds per year when
combined.
    (iv) Comply with the requirements specified in paragraphs (a)(2)(v)
through (viii) of this section, as applicable.
    (b) For continuous compliance, you must comply with paragraphs
(b)(1) through (6) of this section, as applicable.
    (1) If you choose to reduce emissions of ethylene oxide by venting
emissions through a closed-vent system to a flare as specified in table
1, 2, or 4 to this subpart, then you must comply with the requirements
in Sec. Sec.  63.983 and 63.2450(e)(4) through (6).
    (2) Continuously monitor the ethylene oxide concentration at the
exit of the control device using an FTIR CEMS meeting the requirements
of Performance Specification 15 and Sec.  63.2450(j). If you use an
FTIR CEMS, you do not need to conduct the performance testing required
in paragraph (b)(3) of this section or the operating parameter
monitoring required in paragraphs (b)(4) through (6) of this section.
    (3) Conduct a performance test no later than 60 months after the
previous performance test and reestablish operating parameter limits
following the procedures in paragraph (a)(2) through (4) of this
section. The Administrator may request a repeat performance test at any
time.
    (4) If you vent emissions through a closed-vent system to a
scrubber, then you must comply with Sec.  63.2450(e)(4) and (6) and the
requirements in Sec.  63.983, and you must meet the operating parameter
limits specified in paragraphs (b)(4)(i) through (v) of this section.
    (i) Minimum scrubber liquid-to-gas ratio (L/G), equal to the
average L/G measured during the most recent performance test. Determine
total scrubber liquid inlet flow rate with a flow sensor with a minimum
accuracy of at least 5 percent over the normal range of
flow measured, or 1.9 liters per minute (0.5 gallons per minute),
whichever is greater. Determine exit gas flow rate with a flow sensor
with a minimum accuracy of at least 5 percent over the
normal range of flow measured, or 280 liters per minute (10 cubic feet
per minute), whichever is greater. Compliance with the minimum L/G
operating limit must be determined continuously on an instantaneous
basis.
    (ii) Maximum scrubber liquid pH of the liquid in the reactant tank,
equal to the average pH measured during the most recent performance
test. Compliance with the pH operating limit must be determined
continuously on an instantaneous basis. Use a pH sensor with a minimum
accuracy of 0.2 pH units.
    (iii) Maximum pressure drop across the scrubber column, equal to
the average pressure drop measured during the most recent performance
test. Compliance with the pressure drop operating limit must be
determined continuously on an instantaneous basis. Use pressure sensors
with a minimum accuracy of 5 percent over the normal
operating range or 0.12 kilopascals, whichever is greater.
    (iv) Maximum temperature of the water entering the scrubber column,
equal to the average temperature measured during the most recent
performance test. Compliance with the inlet water temperature operating
limit must be determined continuously on an instantaneous basis. Use a
temperature sensor with a minimum accuracy of 1 percent
over the normal range of the temperature measured, expressed in degrees
Celsius, or 2.8 degrees Celsius, whichever is greater.
    (v) Minimum liquid feed pressure to the scrubber column, equal to
the average feed pressure measured during the most recent performance
test. Compliance with the liquid feed pressure operating limit must be
determined continuously on an instantaneous basis. Use a pressure
sensor with a minimum accuracy of 5 percent over the normal
operating range or 0.12 kilopascals, whichever is greater.
    (5) If you vent emissions through a closed-vent system to a thermal
oxidizer, then you must comply with Sec.  63.2450(e)(4) and (6) and the
requirements in Sec.  63.983, and you must meet the operating parameter
limits specified in paragraphs (b)(5)(i) and (ii) of this section and
the requirements in paragraph (b)(5)(iii) of this section.
    (i) Minimum combustion chamber temperature, equal to the average
combustion chamber temperature measured during the most recent
performance test. Determine combustion chamber temperature with a
temperature sensor with a minimum accuracy of at least 1
percent over the normal range of temperature measured, expressed in
degrees Celsius, or 2.8 degrees Celsius, whichever is greater.
Compliance with the minimum combustion chamber temperature operating
limit must be determined continuously on an instantaneous basis.
    (ii) Maximum flue gas flow rate, equal to the average flue gas flow
rate measured during the most recent performance test. Determine flue
gas flow rate with a flow sensor with a minimum accuracy of at least
5 percent over the normal range of flow measured, or 280
liters per minute (10 cubic feet per minute), whichever is greater.
Compliance with the maximum flue gas flow rate operating limit must be
determined continuously on an instantaneous basis.
    (iii) You must maintain the thermal oxidizer in accordance with
good combustion practices that ensure proper combustion. Good
combustion practices include, but are not limited to, proper burner
maintenance, proper burner alignment, proper fuel to air distribution
and mixing, routine inspection, and preventative maintenance.
    (6) If you vent emissions through a closed-vent system to a control
device other than a flare, scrubber, or thermal oxidizer, then you must
comply with Sec.  63.2450(e)(4) and (6) and the requirements in Sec.
63.983, and you must monitor the operating parameters identified in
paragraph (a)(2)(viii) of this section and meet the established
operating parameter limits to ensure continuous compliance. The
frequency of monitoring and averaging time will be determined based
upon the information provided to the Administrator.
    (c) Pressure Vessels. If you have a storage tank in ethylene oxide
service that is considered a pressure vessel as defined in as defined
in Sec.  63.2550(i), then you must operate and maintain the pressure
vessel, as specified in paragraphs (c)(1) through (5) of this section.
    (1) The pressure vessel must be designed to operate with no
detectable emissions at all times.

    (2) Monitor each point on the pressure vessel through which
ethylene oxide could potentially be emitted by conducting initial and
annual performance tests using Method 21 of 40 CFR part 60, appendix A-
7.
    (3) Each instrument reading greater than 500 ppmv is a deviation.
    (4) Estimate the flow rate and total regulated material emissions
from the defect. Assume the pressure vessel has been emitting for half
of the time since the last performance test, unless other information
supports a different assumption.
    (5) Whenever ethylene oxide is in the pressure vessel, you must
operate the pressure vessel as a closed system that vents through a
closed vent system to a control device as specified in paragraphs
(c)(5)(i) through (iii) of this section, as applicable.
    (i) For closed vent systems, comply with Sec.  63.2450(e)(4) and
(6) and the requirements in Sec.  63.983.
    (ii) For a non-flare control device, comply with requirements as
specified in paragraph (b) of this section.
    (iii) For a flare, comply with the requirements of Sec.
63.2450(e)(5).

Option 1 for Paragraph (d)

    (d) Equipment in ethylene oxide service. Except as specified in
paragraphs (d)(1) through (4) and (e) of this section, for equipment in
ethylene oxide service as defined in Sec.  63.2550(i), you must comply
with the requirements of subpart UU or subpart H of this part 63, or 40
CFR part 65, subpart F.
    (1) For pumps in ethylene oxide service, you must comply with the
requirements in paragraphs (d)(1)(i) through (iii) of this section.
    (i) The instrument reading that defines a leak for pumps is 1,000
parts per million or greater.
    (ii) The monitoring period for pumps is monthly.
    (iii) When a leak is detected, it must be repaired as soon as
practicable, but not later than 15 calendar days after it is detected.
    (2) For connectors in ethylene oxide service, you must comply with
the requirements in paragraphs (d)(2)(i) through (iii) of this section.
    (i) The instrument reading that defines a leak for connectors is
500 parts per million or greater.
    (ii) The monitoring period for connectors is once every 12 months.
    (iii) When a leak is detected, it must be repaired as soon as
practicable, but not later than 15 calendar days after it is detected.
    (3) For each light liquid pump or connector in ethylene oxide
service that is added to an affected source, and for each light liquid
pump or connector in ethylene oxide service that replaces a light
liquid pump or connector in ethylene oxide service, you must initially
monitor for leaks within 5 days after initial startup of the equipment.
    (4) Pressure relief devices in ethylene oxide service must not vent
directly to atmosphere.

Option 2 for Paragraph (d)

    (d) Equipment in ethylene oxide service. Except as specified in
paragraphs (d)(1) through (5) and (e) of this section, for equipment in
ethylene oxide service as defined in Sec.  63.2550(i), you must comply
with the requirements of subpart UU or subpart H of this part 63, or 40
CFR part 65, subpart F.
    (1) Except as specified in paragraph (d)(3) of this section, for
pumps in ethylene oxide service, you must comply with the requirements
in paragraphs (d)(1)(i) through (iii) of this section.
    (i) The instrument reading that defines a leak for pumps is 1,000
parts per million or greater.
    (ii) The monitoring period for pumps is monthly.
    (iii) When a leak is detected, it must be repaired as soon as
practicable, but not later than 15 calendar days after it is detected.
    (2) Except as specified in paragraph (d)(3) of this section, for
connectors in ethylene oxide service, you must comply with the
requirements in paragraphs (d)(2)(i) through (iii) of this section.
    (i) The instrument reading that defines a leak for connectors is
500 parts per million or greater.
    (ii) The monitoring period for connectors is once every 12 months.
    (iii) When a leak is detected, it must be repaired as soon as
practicable, but not later than 15 calendar days after it is detected.
    (3) If you operate an MCPU at the facility commonly called Huntsman
Performance at 5451 Jefferson Chemical Road in Conroe, Texas or Lanxess
Corporation at 2151 King Street Extension in Charleston, SC, then you
must comply with the requirements in paragraphs (d)(3)(i) and (ii) of
this section in lieu of the requirements specified in paragraphs (d)(1)
and (2) of this section.
    (i) For pumps and valves in ethylene oxide service, you must comply
with the requirements in paragraphs (d)(3)(i)(A) through (E) of this
section.
    (A) You must install and operate leakless pumps as defined in Sec.
63.2550(i), and monitor the pumps annually.
    (B) You must comply with either paragraph (d)(3)(i)(B)(1) or (2)
for valves.
    (1) Install and operate a leakless valve as defined in Sec.
63.2550(i) and monitor the valve annually or
    (2) Operate any valve that is not considered a leakless valve as
defined in Sec.  63.2550(i) and monitor the valve quarterly.
    (C) Valves and pumps must be monitored using the methods specified
in Sec.  63.180(b) and (c), Sec.  63.1023(b) and (c), or Sec.
65.104(b) and (c).
    (D) For valves and pumps, the instrument reading that defines a
leak is any value above the measured background concentration.
    (E) When a leak is detected, it must be repaired as soon as
practicable, but not later than 15 calendar days after the leak is
detected. A first attempt at repair must be made no later than 5
calendar days after the leak is detected. Following repair, the valve
or pump must be returned to operation as required in paragraphs
(d)(3)(i)(A) through (D) of this section.
    (ii) For connectors in ethylene oxide service, you must comply with
the requirements in paragraphs (d)(3)(ii)(A) through (C) of this
section.
    (A) The instrument reading that defines a leak for connectors is
100 parts per million or greater.
    (B) The monitoring period for connectors is once every month.
    (C) When a leak is detected, it must be repaired as soon as
practicable, but not later than 15 calendar days after the leak is
detected. A first attempt at repair must be made no later than 5
calendar days after the leak is detected. Following repair, the
connector must be returned to operation as required in paragraphs
(d)(3)(ii)(A) and (B) of this section.
    (4) For each light liquid pump, valve, or connector in ethylene
oxide service that is added to an affected source, and for each light
liquid pump, valve, or connector in ethylene oxide service that
replaces a light liquid pump, valve, or connector in ethylene oxide
service, you must initially monitor for leaks within 5 days after
initial startup of the equipment.
    (5) Pressure relief devices in ethylene oxide service must not vent
directly to atmosphere.
    (e) The referenced provisions specified in paragraphs (e)(1)
through (15) of this section do not apply when demonstrating compliance
with this section.
    (1) Sec.  63.163(c)(3) of subpart H.
    (2) Sec.  63.163(e) of subpart H.
    (3) The second sentence of Sec.  63.181(d)(5)(i) of subpart H.
    (4) Sec.  63.1026(b)(3) of subpart UU.

    (5) Sec.  63.1026(e) of subpart UU.
    (6) The phrase (except during periods of startup, shutdown, or
malfunction)'' from Sec.  63.1028(e)(1)(i)(A) of subpart UU.
    (7) The phrase (except during periods of startup, shutdown, or
malfunction)'' from Sec.  63.1031(b)(1) of subpart UU.
    (8) The second sentence of Sec.  65.105(f)(4)(i) of subpart F.
    (9) Sec.  65.107(b)(3) of subpart F.
    (10) Sec.  65.107(e) of subpart F.
    (11) The phrase (except during periods of start-up, shutdown, or
malfunction)'' from Sec.  65.109(e)(1)(i)(A) of subpart F.
    (12) The phrase (except during periods of start-up, shutdown, or
malfunction)'' from Sec.  65.112(b)(1) of subpart F.
    (13) The last sentence of Sec.  65.115(b)(1) of subpart F.
    (14) The last sentence of Sec.  65.115(b)(2) of subpart F.
    (15) For flares complying with Sec.  63.2450(e)(5), the following
provisions do not apply:
    (i) Sec.  63.172(d);
    (ii) Sec.  63.180(e);
    (iii) Sec.  63.181(g)(1)(iii);
    (iv) The phrase ``including periods when a flare pilot light system
does not have a flame'' from Sec.  63.181(g)(2)(i);
    (v) Sec.  63.1034(b)(2)(iii); and
    (vi) Sec.  65.115(b)(2).
    (16) Requirements for maintenance vents in Sec.  63.2455(d).
0
16. Section 63.2495 is amended by revising paragraph (b)(1) to read as
follows:

Sec.  63.2495  How do I comply with the pollution prevention standard?

* * * * *
    (b) * * *
    (1) You must comply with the emission limitations and work practice
standards contained in tables 1 through 7 of this subpart for all HAP
that are generated in the MCPU and that are not included in
consumption, as defined in Sec.  63.2550. If any vent stream routed to
the combustion control is a halogenated vent stream, as defined in
Sec.  63.2550, then hydrogen halides that are generated as a result of
combustion control must be controlled according to the requirements in
Sec.  63.2450(e)(4) and the requirements of Sec.  63.994 and the
requirements referenced therein.
* * * * *
0
17. Section 63.2500 is amended by revising paragraph (a) and adding
paragraph (g) to read as follows:

Sec.  63.2500  How do I comply with emissions averaging?

    (a) For an existing source, you may elect to comply with the
percent reduction emission limitations in Tables 1, 2, 4, 5, and 7 to
this subpart by complying with the emissions averaging provisions
specified in Sec.  63.150, except as specified in paragraphs (b)
through (g) of this section.
* * * * *
    (g) Beginning no later than the compliance dates specified in Sec.
63.2445(g), Sec.  63.150(f)(2) does not apply when demonstrating
compliance with this section.
0
18. Section 63.2505 is amended by revising paragraphs (b)(1) and
(b)(6)(i) and (ii) to read as follows:

Sec.  63.2505  How do I comply with the alternative standard?

* * * * *
    (b) * * *
    (1) You must comply with the requirements in Sec.  63.2450(e)(4)
and the requirements in Sec.  63.983 and the requirements referenced
therein for closed-vent systems.
* * * * *
    (6) * * *
    (i) Demonstrate initial compliance with the 95 percent reduction by
conducting a performance test and setting a site-specific operating
limit(s) for the scrubber in accordance with the requirements in Sec.
63.2450(e)(4) and the requirements of Sec.  63.994 and the requirements
referenced therein. You must submit the results of the initial
compliance demonstration in the notification of compliance status
report. If the performance test report is submitted electronically
through the EPA's CEDRI in accordance with Sec.  63.2520(f), the
process unit(s) tested, the pollutant(s) tested, and the date that such
performance test was conducted may be submitted in the notification of
compliance status report in lieu of the performance test results. The
performance test results must be submitted to CEDRI by the date the
notification of compliance status report is submitted.
    (ii) Install, operate, and maintain CPMS for the scrubber as
specified in Sec. Sec.  63.994(c) and 63.2450(k), instead of as
specified in Sec.  63.1258(b)(5)(i)(C). You must also comply with the
requirements in Sec.  63.2450(e)(4), as applicable.
* * * * *
0
19. Section 63.2515 is amended by revising paragraph (a) and adding
paragraph (d) to read as follows:

Sec.  63.2515  What notifications must I submit and when?

    (a) Except as specified in paragraph (d) of this section, you must
submit all of the notifications in Sec. Sec.  63.6(h)(4) and (5),
63.7(b) and (c), 63.8(e), (f)(4) and (6), and 63.9(b) through (h) that
apply to you by the dates specified.
* * * * *
    (d) Supplement to Notification of Compliance Status. You must also
submit supplements to the Notification of Compliance Status as
specified in Sec.  63.2520(d)(3) through (5) of this section.
0
20. Section 63.2520 is amended by:
0
a. Revising paragraph (c) introductory text and paragraph (c)(2);
0
b. Adding paragraph (c)(8);
0
c. Revising paragraphs (d) introductory text and paragraph (d)(2)(ii);
0
d. Adding paragraphs (d)(3) through (5);
0
e. Revising paragraph (e) introductory text, paragraphs (e)(2) through
(4), paragraph (e)(5)(ii) introductory text, and paragraph
(e)(5)(ii)(A) and (B);
0
f. Adding paragraph (e)(5)(ii)(D);
0
g. Revising paragraph (e)(5)(iii) introductory text, paragraph
(e)(5)(iii)(A) through(F), and (e)(5)(iii)(I);
0
h. Adding paragraphs (e)(5)(iii)(M) and (N);
0
i. Revising paragraphs (e)(7) and (8);
0
j. Adding paragraphs (e)(11) through (17), and (f) through (i).
    The revisions and additions read as follows:

Sec.  63.2520  What reports must I submit and when?

* * * * *
    (c) Precompliance report. You must submit a precompliance report to
request approval for any of the items in paragraphs (c)(1) through (8)
of this section. We will either approve or disapprove the report within
90 days after we receive it. If we disapprove the report, you must
still be in compliance with the emission limitations and work practice
standards in this subpart by the compliance date. To change any of the
information submitted in the report, you must notify us 60 days before
the planned change is to be implemented.
* * * * *
    (2) Descriptions of daily or per batch demonstrations to verify
that control devices subject to Sec.  63.2450(k)(6) are operating as
designed.
* * * * *
    (8) For halogen reduction device other than a scrubber, procedures
for establishing monitoring parameters.
    (d) Notification of compliance status report. You must submit a
notification of compliance status report according to the schedule in
paragraph (d)(1) of this section, and the notification of compliance
status report must contain the information specified in paragraphs
(d)(2) through (5) of this section.
* * * * *

    (2) * * *
    (ii) The results of emissions profiles, performance tests,
engineering analyses, design evaluations, flare compliance assessments,
inspections and repairs, and calculations used to demonstrate initial
compliance according to Sec. Sec.  63.2455 through 63.2485. For
performance tests, results must include descriptions of sampling and
analysis procedures and quality assurance procedures. If the
performance test report is submitted electronically through the EPA's
CEDRI in accordance with paragraph (f) of this section, the process
unit(s) tested, the pollutant(s) tested, and the date that such
performance test was conducted may be submitted in the notification of
compliance status report in lieu of the performance test results. The
performance test results must be submitted to CEDRI by the date the
notification of compliance status report is submitted.
* * * * *
    (3) For flares subject to the requirements of Sec.  63.2450(e)(5),
you must also submit the information in this paragraph in a supplement
to the Notification of Compliance Status within 150 days after the
first applicable compliance date for flare monitoring. In lieu of the
information required in Sec.  63.987(b) of subpart SS, the supplement
to the Notification of Compliance Status must include flare design
(e.g., steam-assisted, air-assisted, non-assisted, or pressure-assisted
multi-point); all visible emission readings, heat content
determinations, flow rate measurements, and exit velocity
determinations made during the initial visible emissions demonstration
required by Sec.  63.670(h) of subpart CC, as applicable; and all
periods during the compliance determination when the pilot flame is
absent.
    (4) For pressure relief devices subject to the pressure release
management work practice standards in Sec.  63.2480(e)(3), you must
also submit the information listed in paragraphs (d)(4)(i) and (ii) of
this section in a supplement to the Notification of Compliance Status
within 150 days after the first applicable compliance date for pressure
relief device monitoring.
    (i) A description of the monitoring system to be implemented,
including the relief devices and process parameters to be monitored,
and a description of the alarms or other methods by which operators
will be notified of a pressure release.
    (ii) A description of the prevention measures to be implemented for
each affected pressure relief device.
    (5) For process vents, storage tanks, and equipment leaks subject
to the requirements of Sec.  63.2493, you must also submit the
information in this paragraph in a supplement to the Notification of
Compliance Status within 150 days after the first applicable compliance
date. The supplement to the Notification of Compliance Status must
identify all process vents, storage tanks, and equipment that are in
ethylene oxide service as defined in Sec.  63.2550, the method(s) used
to control ethylene oxide emissions from each process vent and storage
tank (i.e., use of a flare, scrubber, or other control device), the
method(s) used to control ethylene oxide emissions from equipment
(i.e., subpart UU or subpart H of this part 63, or 40 CFR part 65,
subpart F), and the information specified in paragraphs (d)(5)(A)
through (C) of this section.
    (A) For process vents, include all uncontrolled, undiluted ethylene
oxide concentration measurements, and the calculations you used to
determine the total uncontrolled, undiluted ethylene oxide mass
emission rate for the sum of all vent gas streams.
    (B) For storage tanks, include the concentration of ethylene oxide
of the fluid stored in each storage tank.
    (C) For equipment, include the percent ethylene oxide content of
the process fluid and the method used to determine it, and identify the
location of each leakless pump and valve in operation.
    (e) Compliance report. The compliance report must contain the
information specified in paragraphs (e)(1) through (17) of this
section. On and after [date three years after date of publication of
final rule in the Federal Register], you must submit all subsequent
reports to the EPA via the CEDRI, which can be accessed through the
EPA's CDX (https://cdx.epa.gov/). You must use the appropriate
electronic report template on the CEDRI website (https://www.epa.gov/electronic-reporting-air-emissions/compliance-and-emissions-data-reporting-interface-cedri) for this subpart. The report must be
submitted by the deadline specified in this subpart, regardless of the
method in which the report is submitted. If you claim some of the
information required to be submitted via CEDRI is CBI, 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. 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 earlier in
this paragraph.
* * * * *
    (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 this
requirement.
    (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 [date
3 years after date of publication of final rule in the Federal
Register], this paragraph no longer applies; however, for historical
compliance purposes, a copy of the plan must be retained and available
on-site for five years after [date 3 years after date of publication of
final rule in the Federal Register].
    (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, 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).
* * * * *
    (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) of this section 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 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.  63.670(o)(3)
of subpart CC:
    (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 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 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.  63.2455(d)(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.  63.2455(d)(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.  63.2455(d)(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)(2)(i), report the dates for all
instrument 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)(ii), report the dates of
instrument monitoring conducted.
    (iii) For pressure relief devices in organic HAP service subject to
Sec.  63.2480(e)(2)(iii), report each pressure release to the
atmosphere, including the start date, start time, and duration of the
pressure release and 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, beginning no later than the
compliance dates specified in 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).
    (ii) The number of heat exchange systems at the plant site found to
be leaking.
    (iii) For each monitoring location where the total strippable
hydrocarbon concentration was determined to be equal to or greater than
the applicable leak definitions specified in Sec.  63.2490(d)(1)(v),
identification of the monitoring location (e.g., unique monitoring
location or heat exchange system ID number), the measured total
strippable hydrocarbon concentration in ppmv as methane, 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 in ppmv as methane 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 in ppmv as methane and
date of each monitoring event conducted on the delayed repair during
the reporting period, and an estimate in pounds of the potential
strippable 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 [date 60 days
after date of publication of final rule in the Federal Register], you
must submit performance test reports in accordance with this paragraph.
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). If you claim some of
the information submitted under paragraphs (f)(1) and (2) of this
section is CBI, 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.
    (g) Performance evaluation reports. Beginning no later than [date
60 days after date of publication of final rule in the Federal
Register], you must start submitting performance evaluation reports in
accordance with this paragraph. 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 relative accuracy test
audit (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). If you claim some of
the information submitted under paragraphs (g)(1) and (2) of this
section is CBI, 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.
    (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
the 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) 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.
    (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 the 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,
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) 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.  63.2450(e)(4), Sec.  63.2480(f),
Sec.  63.2485(p) and (q), and paragraph (t) of this section, each
applicable record required by subpart A of this part 63 and in
referenced subparts F, G, SS, UU, WW, and GGG of this part 63 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. Sec.  63.987 or 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), 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 [date 3 years after date of publication of final rule in the
Federal Register], this paragraph 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).
    (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 (15) 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 as required in Sec.  63.670(b) of
subpart CC and Sec.  63.2450(e)(5)(vii)(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 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.
    (2) Retain records of daily visible emissions observations or video
surveillance images required in Sec.  63.670(h) of subpart CC 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 at 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, 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.  63.670(d) through (f) of
subpart CC and Sec.  63.2450(e)(5)(vii) 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.  63.670(o)(3) of subpart CC,
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.
    (15) Records described in Sec.  63.10(b)(2)(vi) and (xi).
    (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 (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 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.  63.2455(d), you must keep the applicable records specified in
(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.  63.2455(d). 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.  63.2455(d))(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.  63.2455(d)(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.  63.2455(d)(1)(iii),
records used to estimate 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 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, identification of 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.  63.2455(d)(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 five 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 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 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 strippable 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 (D) of this section.
    (A) Determine the leak concentration as specified in Sec.
63.2490(d) and convert 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'' Revision Number One, dated January 2003,
Sampling Procedures Manual, appendix P: Cooling Tower Monitoring,
prepared by Texas Commission on Environmental Quality, January 31, 2003
(incorporated by reference--see Sec.  63.14) and the molecular weight
of 16 grams per mole (g/mol) for methane.
    (B) Determine 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. Volumetric
flow measurements may be used and converted to mass flow rates using
the density of water at the specific monitoring location temperature or
using the default density of water at 25 degrees Celsius, which is 997
kilograms per cubic meter or 8.32 pounds per gallon.
    (C) For delay of repair monitoring intervals prior to repair of the
leak, calculate the potential strippable hydrocarbon emissions for the
leaking heat exchange system or heat exchanger for the monitoring
interval by multiplying the leak concentration in the cooling water,
ppmw, determined in (r)(4)(iv)(A) of this section, by the mass flow
rate of the cooling water determined in (r)(4)(iv)(B) of this section
and 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.
    (D) For delay of repair monitoring intervals ending with a repaired
leak, calculate the potential strippable 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 leak concentration and
cooling water flow rates 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, undiluted 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, and records
identifying the location of each leakless pump and valve in operation.
    (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) Sec.  63.103(c)(2)(i) of subpart F.
    (2) Sec.  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) Sec.  63.152(g)(2)(iv)(A) of subpart G.
0
22. Section 63.2535 is amended by revising the introductory text and
paragraph (d) 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. Sec.  63.2445(g), 63.2450(e)(5) or 63.2493 but subject
to other provisions of both this subpart and another rule, 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 63. 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 63, you may elect to comply with the provisions of subpart H,
GGG, or MMM of this part 63, respectively, for all such equipment,
except the affirmative defense requirements in subparts GGG and MMM no
longer apply.
* * * * *
    (m) Overlap of subpart FFFF with other regulations for flares.
Beginning no later than the compliance dates specified in Sec.
63.2445(g), flares that control ethylene oxide emissions or are used to
control emissions from processes 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 through 7 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.
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 40 CFR part 63,
subpart E, 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. In Sec.  63.2550 amend paragraph (i) by:
0
a. Revising paragraph (4) in the definition of ``Batch process vent'';
0
b. Adding, in alphabetical order, new definitions for ``Bench-scale
process'' and ``Breakthrough'';
0
c. Adding paragraphs (8) and (9) 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'', ``Leakless
pump'', ``Leakless valve'', ``Loading rack'';
0
f. Revising paragraph (6) in the definition of ``Miscellaneous organic
chemical manufacturing process''; and
0
g. Adding definitions, in alphabetical order, for ``Pressure release'',
``Pressure relief device'', ``Pressure vessel'', and ``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 [date 3 years after date of publication of final rule in the
Federal Register], 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;
* * * * *
    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 detected
is at the highest concentration allowed to be discharged from an
adsorber system.
* * * * *
    Continuous process vent * * *
    (8) On and after [date 3 years after date of publication of final
rule in the Federal Register], 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 [date 3 years after date of publication of final
rule in the Federal Register], 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 this section, 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) 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.
* * * * *
    Deviation * * *
    (3) Before [date 3 years after date of publication of final rule in
the Federal Register], 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 [date 3 years after date of
publication of final rule in the Federal Register], this paragraph 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 anywhere in the
process, and when combined, the sum of all these process vents would
emit uncontrolled, undiluted 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 with a concentration of ethylene oxide
greater than or equal to 1 ppmw. 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.
* * * * *
    Leakless pump means a pump that has no externally actuated shaft
penetrating the pump housing, and as such, is designed to operate with
no instrument readings above the background concentration level, as
demonstrated using Method 21 of 40 CFR part 60, appendix A-7. Examples
of leakless pumps include diaphragm pumps, magnetically-driven pumps,
and canned motor pumps. A pump equipped with a dual mechanical seal
system that includes a barrier fluid system with a higher pressure than
the process is also considered a leakless pump.
    Leakless valve means a valve that has no external actuating
mechanism in contact with the process fluid, and as such, is designed
to operate with no instrument readings above the background
concentration level, as demonstrated using Method 21 of 40 CFR part 60,
appendix A-7. Examples of leakless valves include bellows valves which
are gate or globe valves that use a cylindrical metal bellows to
hermetically seal the valve against stem leakage.
    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.
    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.
* * * * *
0
25. Table 1 to subpart FFFF of part 63 is revised to read as follows:

  Table 1 to Subpart FFFF of Part 63--Emission Limits and Work Practice
                 Standards for Continuous Process Vents
  [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]
------------------------------------------------------------------------
       For each . . .            For which . . .     Then you must . . .
------------------------------------------------------------------------
1. Group 1 continuous         a. Not applicable...  i. Reduce emissions
 process vent.                                       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        a. You use a          i. Use a halogen
 continuous process vent       combustion control    reduction device
 stream.                       device to control     after the
                               organic HAP           combustion device
                               emissions.            to reduce emissions
                                                     of 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         You use a recovery    Comply with the
 process vent at an existing   device to maintain    requirements in
 source.                       the TRE level >1.9    Sec.
                               but <=5.0.            63.2450(e)(4) and
                                                     the requirements in
                                                     Sec.   63.993 and
                                                     the requirements
                                                     referenced therein.
4. Group 2 continuous         You use a recovery    Comply with the
 process vent at a new         device to maintain    requirements in
 source.                       the TRE level >5.0    Sec.
                               but <=8.0.            63.2450(e)(4) and
                                                     the requirements in
                                                     Sec.   63.993 and
                                                     the requirements
                                                     referenced therein.
5. Continuous process vent..  Beginning no later    Comply with the
                               than the compliance   applicable emission
                               dates specified in    limits specified in
                               Sec.   63.2445(i),    items 1 through 4
                               the continuous        of this Table, and
                               process vent          also:
                               contains ethylene    i. Reduce emissions
                               oxide such that it    of ethylene oxide
                               is considered to be   by venting
                               in ethylene oxide     emissions through a
                               service as defined    closed-vent system
                               in Sec.   63.2550.    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
26. Table 2 to subpart FFFF of part 63 is amended by adding a new entry
3 to read as follows:

     Table 2 to Subpart FFFF of Part 63--Emission Limits and Work Practice Standards for Batch Process Vents
  [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]
----------------------------------------------------------------------------------------------------------------
            For each . . .                         Then you must . . .                   And you must . . .
----------------------------------------------------------------------------------------------------------------
1. Process with Group 1 batch process  a. Reduce collective uncontrolled organic   Not applicable.
 vents.                                 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 organic   Not applicable.
                                        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
                                        emissions from one or more batch process    vents within the process,
                                        vents within the process by venting         reduce collective organic
                                        through a closed-vent system to a flare     HAP emissions as specified
                                        or by venting through one or more closed-   in item 1.a and/or item 1.b
                                        vent systems to any combination of          of this table.
                                        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 process   a. Use a halogen reduction device after     i. Reduce overall emissions
 vent for which you use a combustion    the combustion control device; or           of hydrogen halide and
 device to control organic HAP                                                      halogen HAP by >=99 percent;
 emissions.                                                                         or
                                                                                ii. Reduce overall emissions
                                                                                of hydrogen 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
                                        the combustion control device.              emission rate to <=0.45 kg/
                                                                                hr or to a concentration
                                                                                <=20 ppmv.
3. Batch process vent that contains    Beginning no later than the compliance      Not applicable.
 ethylene oxide such that it is         dates specified in Sec.   63.2445(i),
 considered to be in ethylene oxide     comply with the applicable emission
 service as defined in Sec.   63.2550.  limits specified in items 1 and 2 of this
                                        Table, and also:
                                          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:

  Table 4 to Subpart FFFF of Part 63--Emission Limits for Storage Tanks
[As required in Sec.   63.2470, you must meet each emission limit in the
           following table that applies to your storage tanks]
------------------------------------------------------------------------
       For each . . .            For which . . .     Then you must . . .
------------------------------------------------------------------------
1. Group 1 storage tank.....  a. The maximum true   i. Reduce total HAP
                               vapor pressure of     emissions by >=95
                               total HAP at the      percent by weight
                               storage temperature   or to <=20 ppmv of
                               is >=76.6             TOC or organic HAP
                               kilopascals.          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
                                                    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.\a\
                              b. The maximum true   i. Comply with the
                               vapor pressure of     requirements of
                               total HAP at the      subpart WW of this
                               storage temperature   part, except as
                               is <76.6              specified in Sec.
                               kilopascals.          63.2470; or
                                                    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.\a\
2. Halogenated vent stream    You use a combustion  Meet one of the
 from a Group 1 storage tank.  control device to     emission limit
                               control organic HAP   options specified
                               emissions.            in Item 2.a.i or
                                                     ii. in Table 1 to
                                                     this subpart.
3. Storage tank of any        Beginning no later    Comply with the
 capacity and vapor pressure.  than the compliance   applicable emission
                               dates specified in    limits specified in
                               Sec.   63.2445(i),    items 1 and 2 of
                               the stored liquid     this Table, and
                               contains ethylene     also:
                               oxide such that the  i. Reduce emissions
                               storage tank is       of ethylene oxide
                               considered to be in   by venting
                               ethylene oxide        emissions through a
                               service as defined    closed-vent system
                               in Sec.   63.2550.    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
                                                        storage tank
                                                        vent.
------------------------------------------------------------------------
\a\ 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, must be in compliance with Sec.
  63.2450(e)(5).

0
28. Table 5 to subpart FFFF of part 63 is revised to read as follows:

  Table 5 to Subpart FFFF of Part 63--Emission Limits and Work Practice
                      Standards for Transfer Racks
  [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]
------------------------------------------------------------------------
             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