least once every month to verify that the valve is maintained in the
non-diverting position, and the vent stream is not diverted through the
bypass. A broken seal or closure mechanism or a diverted valve
constitutes a violation from the emission limits in Table 1 or 2 to
this subpart. You must maintain the records specified in paragraph
(g)(1)(ii) of this section.
    (ii) For each seal or closure mechanism, you must comply with
either paragraph (c)(2)(ii)(A) or (B) of this section.
    (A) For each instance that you change the bypass valve to the
diverting position, you must submit to the Administrator as part of
your compliance report, the information specified in Sec.
63.11985(b)(9) and (10). This report is required even if you elect to
follow the procedures specified in Sec.  63.11895 to establish an
affirmative defense and submit the reports specified in Sec.
63.11985(b)(11).

    (B) You must install, maintain, and operate a bypass flow indicator
as specified in paragraphs (c)(1)(i) and (ii) of this section and you
must meet the requirements in paragraph (c)(1)(iii) and (iv) of this
section for each instance that the flow indicator alarm is triggered.
    (d) Closed vent system inspection and monitoring requirements.
Except as provided in paragraph (d)(3) of this section, you must
inspect each closed vent system as specified in paragraph (d)(1) or (2)
of this section.
    (1) Hard-piping inspection. If the closed vent system is
constructed of hard-piping, you must comply with the requirements
specified in paragraphs (d)(1)(i) and (ii) of this section.
    (i) Conduct an initial inspection according to the procedures in
paragraph (e) of this section.
    (ii) Conduct annual inspections for visible, audible, or olfactory
indications of leaks.
    (2) Ductwork inspection. If the closed vent system is constructed
of ductwork, you must conduct initial and annual inspections according
to the procedures in paragraph (e) of this section.
    (3) Equipment that is unsafe to inspect. You may designate any
parts of the closed vent system as unsafe to inspect if you determine
that personnel would be exposed to an immediate danger as a consequence
of complying with the initial and annual closed vent system inspection
requirements of this subpart.
    (e) Closed vent system inspection procedures. Except as provided in
paragraph (e)(4) of this section, you must comply with all provisions
of paragraphs (e)(1) through (3) of this section.
    (1) General. Inspections must be performed during periods when HAP
is being collected by or vented through the closed vent system. A leak
is indicated by an instrument reading greater than 500 parts per
million by volume above background or by visual inspection.
    (2) Inspection procedures. Each closed vent system subject to this
paragraph (e)(2) must be inspected according to the procedures
specified in paragraphs (e)(2)(i) through (vii) of this section.
    (i) Inspections must be conducted in accordance with Method 21 at
40 CFR part 60, appendix A-7, except as otherwise specified in this
section.
    (ii) Except as provided in paragraph (e)(2)(iii) of this section,
the detection instrument must meet the performance criteria of Method
21 at 40 CFR part 60, appendix A-7, except the instrument response
factor criteria in section <IP_ADDRESS> of Method 21 must be for the
representative composition of the process fluid and not of each
individual volatile organic compound in the stream. For process streams
that contain nitrogen, air, water or other inerts that are not organic
HAP or volatile organic compound, the representative stream response
factor must be determined on an inert-free basis. You may determine the
response factor at any concentration for which you will monitor for
leaks.
    (iii) If no instrument is available at the plant site that will
meet the performance criteria of Method 21 at 40 CFR part 60, appendix
A-7 specified in paragraph (e)(2)(ii) of this section, the instrument
readings may be adjusted by multiplying by the representative response
factor of the process fluid, calculated on an inert-free basis as
described in paragraph (e)(2)(ii) of this section.
    (iv) The detection instrument must be calibrated before use on each
day of its use by the procedures specified in Method 21 at 40 CFR part
60, appendix A-7.
    (v) Calibration gases must be as specified in paragraphs
(e)(2)(v)(A) through (D) of this section.
    (A) Zero air (less than 10 parts per million by volume hydrocarbon
in air).
    (B) Mixtures of methane in air at a concentration less than 10,000
parts per million by volume. A calibration gas other than methane in
air may be used if the instrument does not respond to methane or if the
instrument does not meet the performance criteria specified in
paragraph (e)(2)(ii) of this section. In such cases, the calibration
gas may be a mixture of one or more of the compounds to be measured in
air.
    (C) If the detection instrument's design allows for multiple
calibration scales, then the lower scale must be calibrated with a
calibration gas that is no higher than 2,500 parts per million by
volume.
    (D) Perform a calibration drift assessment, at a minimum, at the
end of each monitoring day. Check the instrument using the same
calibration gas(es) that were used to calibrate the instrument before
use. Follow the procedures specified in Method 21 at 40 CFR part 60,
appendix A-7, section 10.1, except do not adjust the meter readout to
correspond to the calibration gas value. Record the instrument reading
for each scale used as specified in paragraph (g)(4) of this section.
Divide these readings by the initial calibration values for each scale
and multiply by 100 to express the calibration drift as a percentage.
If any calibration drift assessment shows a negative drift of more than
10 percent from the initial calibration value, then all equipment
monitored since the last calibration with instrument readings below the
appropriate leak definition and above the leak definition multiplied by
the value specified in paragraph (e)(2)(v)(D)(1) of this section must
be re-monitored. If any calibration drift assessment shows a positive
drift of more than 10 percent from the initial calibration value, then,
at your discretion, all equipment since the last calibration with
instrument readings above the appropriate leak definition and below the
leak definition multiplied by the value specified in paragraph
(e)(2)(v)(D)(2) of this section may be re-monitored.
    (1) 100 minus the percent of negative drift, divided by 100.
    (2) 100 plus the percent of positive drift, divided by 100.
    (vi) You may elect to adjust or not adjust instrument readings for
background. If you elect not to adjust readings for background, all
such instrument readings must be compared directly to 500 parts per
million by volume to determine whether there is a leak. If you elect to
adjust instrument readings for background, you must measure background
concentration using the procedures in this section. You must subtract
the background reading from the maximum concentration indicated by the
instrument.
    (vii) If you elect to adjust for background, the arithmetic
difference between the maximum concentration indicated by the
instrument and the background level must be compared with 500 parts per
million by volume for determining whether there is a leak.
    (3) Instrument probe. The instrument probe must be traversed around
all potential leak interfaces as described in Method 21 at 40 CFR part
60, appendix A-7.
    (4) Unsafe-to-inspect written plan requirements. For equipment
designated as unsafe to inspect according to the provisions of
paragraph (d)(3) of this section, you must maintain and follow a
written plan that requires inspecting the equipment as frequently as
practical during safe-to-inspect times, but not more frequently than
the annual inspection schedule otherwise applicable. You must still
repair unsafe-to-inspect equipment according to the procedures in
paragraph (f) of this section if a leak is detected.
    (f) Closed vent system leak repair provisions. The provisions of
this paragraph (f) apply to closed vent systems collecting HAP from an
affected source.
    (1) Leak repair general for hard-piping. If there are visible,
audible, or olfactory indications of leaks at the time

of the annual visual inspections required by paragraph (d)(1)(ii) of
this section, you must follow the procedure specified in either
paragraph (f)(1)(i) or (ii) of this section.
    (i) You must eliminate the leak.
    (ii) You must monitor the equipment according to the procedures in
paragraph (e) of this section and comply with the leak repair
provisions in paragraph (f)(2) of this section.
    (2) Leak repair schedule. Leaks must be repaired as soon as
practical, except as provided in paragraph (f)(3) of this section.
    (i) A first attempt at repair must be made no later than 5 days
after the leak is detected.
    (ii) Except as provided in paragraph (f)(3) of this section,
repairs must be completed no later than 15 days after the leak is
detected or at the beginning of the next introduction of vapors to the
system, whichever is later.
    (3) Delay of repair. Delay of repair of a closed vent system for
which leaks have been detected is allowed if repair within 15 days
after a leak is detected is technically infeasible or unsafe without a
closed vent system shutdown or if you determine that emissions
resulting from immediate repair would be greater than the emissions
likely to result from delay of repair. Repair of such equipment must be
completed as soon as practical, but not later than the end of the next
closed vent system shutdown.
    (g) Closed vent system records. For closed vent systems, you must
record the information specified in paragraphs (g)(1) through (5) of
this section, as applicable.
    (1) Bypass records. For each closed vent system that contains a
bypass that could divert a vent stream away from the control device and
to the atmosphere, or cause air intrusion into the control device, you
must keep a record of the information specified in either paragraph
(g)(1)(i) or (ii) of this section, as applicable.
    (i) You must maintain records of any alarms triggered because flow
was detected in the bypass, including the date and time the alarm was
triggered, the duration of the flow in the bypass, as well as records
of the times of all periods when the vent stream is diverted from the
control device or the flow indicator is not operating.
    (ii) Where a seal mechanism is used to comply with paragraph (c)(2)
of this section, hourly records of flow are not required. In such
cases, you must record that the monthly visual inspection of the seals
or closure mechanisms has been done, and must record the occurrence of
all periods when the seal mechanism is broken, the bypass valve
position has changed, or the key for a lock-and-key type lock has been
checked out, and records of any car-seal that has been broken.
    (2) Inspection records. For each instrumental or visual inspection
conducted in accordance with paragraph (d)(1) or (2) of this section
for closed vent systems collecting HAP from an affected source during
which no leaks are detected, you must record that the inspection was
performed, the date of the inspection, and a statement that no leaks
were detected.
    (3) Leak records. When a leak is detected from a closed vent system
collecting HAP from an affected source, the information specified in
paragraphs (g)(3)(i) through (vi) of this section must be recorded and
kept for 5 years.
    (i) The instrument and the equipment identification number and the
operator name, initials, or identification number.
    (ii) The date the leak was detected and the date of the first
attempt to repair the leak.
    (iii) The date of successful repair of the leak.
    (iv) The maximum instrument reading measured by the procedures in
paragraph (e) of this section after the leak is successfully repaired.
    (v) Repair delayed and the reason for the delay if a leak is not
repaired within 15 days after discovery of the leak. You may develop a
written procedure that identifies the conditions that justify a delay
of repair. In such cases, reasons for delay of repair may be documented
by citing the relevant sections of the written procedure.
    (vi) Copies of the compliance reports as specified in Sec.
63.11985(b)(9), if records are not maintained on a computerized
database capable of generating summary reports from the records.
    (4) Instrument calibration records. You must maintain records of
the information specified in paragraphs (g)(4)(i) through (vi) of this
section for monitoring instrument calibrations conducted according to
sections 8.1.2 and 10 of Method 21 at 40 CFR part 60, appendix A-7, and
paragraph (e) of this section.
    (i) Date of calibration and initials of operator performing the
calibration.
    (ii) Calibration gas cylinder identification, certification date,
and certified concentration.
    (iii) Instrument scale(s) used.
    (iv) A description of any corrective action taken if the meter
readout could not be adjusted to correspond to the calibration gas
value in accordance with section 10.1 of Method 21 at 40 CFR part 60,
appendix A-7.
    (v) Results of each calibration drift assessment required by
paragraph (e)(2)(v)(D) of this section (i.e., instrument reading for
calibration at end of the monitoring day and the calculated percent
difference from the initial calibration value).
    (vi) If you make your own calibration gas, a description of the
procedure used.
    (5) Unsafe-to-inspect records. If you designate equipment as
unsafe-to-inspect as specified in paragraph (d)(3) of this section, you
must keep the records specified in paragraph (g)(5)(i) and (ii) of this
section.
    (i) You must maintain the identity of unsafe-to-inspect equipment
as specified in paragraph (d)(3) of this section.
    (ii) You must keep a written plan for inspecting unsafe-to-inspect
equipment as required by paragraph (e)(4) of this section and record
all activities performed according to the written plan.
    (h) Closed vent systems in vacuum service. If you operate and
maintain a closed vent system in vacuum service as defined in Sec.
63.12005, you must comply with the requirements in paragraphs (h)(1)
through (3) of this section, and you are not required to comply with
any other provisions of this section. Any incidence where a closed vent
system designed to be in vacuum service is operating and not in vacuum
service constitutes a violation of this rule, unless the closed vent
system is meeting the requirements in paragraphs (a) through (g) of
this section for closed vent systems that are not in vacuum service.
Any such incidence during a performance test invalidates the
performance test.
    (1) In vacuum service alarm. You must install, maintain, and
operate a pressure gauge and alarm system that will alert an operator
immediately and automatically when the pressure is such that the closed
vent system no longer meets the definition of in vacuum service as
defined in Sec.  63.12005. The alarm must be located such that the
alert is detected and recognized easily by an operator.
    (2) In vacuum service alarm procedures. If the alarm is triggered
for a closed vent system operating in vacuum service as specified in
paragraph (h)(1) of this section, you must immediately initiate
procedures to identify the cause of the alarm. If the closed vent
system is not in vacuum service, you must initiate procedures to get
the closed vent system back in vacuum service as defined in Sec.
63.12005, or you must immediately comply with the requirements in
paragraphs (a) through (g) of this section

for closed vent systems that are not in vacuum service.
    (3) In vacuum service alarm records and reports. For any incidences
where a closed vent system designed to be in vacuum service is not in
vacuum service, you must submit to the Administrator as part of your
compliance report, the information specified in Sec.  63.11985(b)(10).
This report is required even if you elect to follow the procedures
specified in Sec.  63.11895 to establish an affirmative defense and
submit the reports specified in Sec.  63.11985(b)(11).

Sec.  63.11935  What CEMS and CPMS requirements must I meet to
demonstrate initial and continuous compliance with the emission
standards for process vents?

    (a) General requirements for CEMS and CPMS. You must meet the
requirements in paragraph (b) of this section for each CEMS specified
in Sec.  63.11925(c) used to demonstrate compliance with the emission
limits for process vents in Table 1 or 2 to this subpart. You must meet
the CPMS requirements in paragraph (c) of this section and establish
your operating limits in paragraph (d) of this section for each
operating parameter specified in Table 5 to this subpart for each
process vent control device specified in Sec.  63.11925(b) that is used
to comply with the emission limits for process vents in Table 1 or 2 to
this subpart, except that flow indicators specified in Sec.
63.11940(a) are not subject to the requirements of this section.
    (b) CEMS. You must install, operate, and maintain each CEMS
according to paragraphs (b)(1) through (7) of this section and
continuously monitor emissions.
    (1) You must prepare your quality control program and site-specific
performance evaluation test plan, as specified in Sec.  63.8(d) and
(e). You must submit your performance evaluation test plan to the
Administrator for approval, as specified in Sec.  63.8(e)(3).
    (2) The monitoring equipment must be capable of providing a
continuous record, recording data at least once every 15 minutes.
    (3) You must conduct initial and periodic site-specific performance
evaluations and any required tests of each CEMS according to your
quality control program and site-specific performance evaluation test
plan prepared as specified in Sec.  63.8(d) and (e).
    (4) If supplemental gases are added to the control device, you must
correct the measured concentrations in accordance with Sec.
63.11945(d)(3).
    (5) You must operate and maintain the CEMS in continuous operation
according to the quality control program and performance evaluation
test plan. CEMS must record data at least once every 15 minutes.
    (6) CEMS must meet the minimum accuracy and calibration frequency
requirements specified in the performance specifications specified in
paragraphs (b)(6)(i) and (ii) of this section, as applicable.
    (i) A hydrogen chloride or dioxin/furan CEMS must meet the
requirements of the promulgated performance specification for the CEMS.
    (ii) A total hydrocarbon CEMS must meet the requirements of 40 CFR
Part 60, Appendix B, performance specification 8A.
    (7) Before commencing or ceasing use of a CEMS system, you must
notify the Administrator as specified in paragraphs (b)(7)(i) and (ii)
of this section.
    (i) You must notify the Administrator 1 month before starting use
of the continuous emissions monitoring system.
    (ii) You must notify the Administrator 1 month before stopping use
of the continuous emissions monitoring system, in which case you must
also conduct a performance test within 60 days of ceasing operation of
the system.
    (c) CPMS. You must install, maintain, and operate each CPMS as
specified in paragraphs (c)(1) through (6) of this section and
continuously monitor operating parameters.
    (1) As part of your quality control program and site-specific
performance evaluation test plan prepared as specified in Sec.  63.8(d)
and (e), you must prepare a site-specific monitoring plan that
addresses the monitoring system design, data collection, and the
quality assurance and quality control elements specified in paragraphs
(c)(1)(i) through (v) of this section and Sec.  63.8(d). You are not
required to submit the plan for approval unless requested by the
Administrator. You may request approval of monitoring system quality
assurance and quality control procedure alternatives to those specified
in paragraphs (c)(1)(i) through (v) of this section in your site-
specific monitoring plan.
    (i) The performance criteria and design specifications for the
monitoring system equipment, including the sample interface, detector
signal analyzer, and data acquisition and calculations.
    (ii) Sampling interface (e.g., thermocouple) location such that the
monitoring system will provide representative measurements.
    (iii) Equipment performance checks, calibrations, or other audit
procedures.
    (iv) Ongoing operation and maintenance procedures in accordance
with provisions in Sec.  63.8(c)(1) and (3).
    (v) Ongoing reporting and recordkeeping procedures in accordance
with provisions in Sec.  63.10(c), (e)(1) and (e)(2)(i).
    (2) The monitoring equipment must be capable of providing a
continuous record, recording data at least once every 15 minutes.
    (3) You must install, operate, and maintain each CPMS according to
the procedures and requirements in your site-specific monitoring plan.
    (4) You must conduct an initial and periodic site-specific
performance evaluation tests of each CPMS according to your site-
specific monitoring plan.
    (5) All CPMS must meet the specific parameter (e.g., minimum
accuracy and calibration frequency) requirements specified in Sec.
63.11940 and Table 7 to this subpart.
    (6) Monitoring equipment for temperature, pressure, volumetric flow
rate, mass flow rate and conductivity must be capable of measuring the
appropriate parameter over a range that extends at least 20 percent
beyond the normal expected operating range of values for that
parameter. The data recording system associated with affected CPMS must
have a resolution that is equal to or better than one-half of the
required system accuracy.
    (d) Establish operating limit. For each operating parameter that
must be monitored in Sec.  63.11925(c) for process vent control
devices, you must establish an operating limit as specified in
paragraphs (d)(1) through (4) of this section. You must establish each
operating limit as an operating parameter range, minimum operating
parameter level, or maximum operating parameter level as specified in
Table 7 to this subpart. Where this subpart does not specify which
format to use for your operating limit (e.g., operating range or
minimum operating level), you must determine which format is best to
establish proper operation of the control device such that you are
meeting the emission limits specified in Table 1 or 2 to this subpart.
    (1) For process vent control devices, the operating limit
established for each monitored parameter specified in Sec.  63.11940
must be based on the operating parameter values recorded during any
performance test conducted to demonstrate compliance as required by
Sec.  63.11925(d)(4) and (e)(4) and may be supplemented by engineering
assessments and/or manufacturer's recommendations. You are not required

to conduct performance tests over the entire range of allowed operating
parameter values. The established operating limit must represent the
conditions for which the control device is meeting the emission limits
specified in Table 1 or 2 to this subpart.
    (2) You must include as part of the notification of compliance
status or the operating permit application or amendment, the
information in paragraphs (d)(2)(i) through (iv) of this section, as
applicable, for each process vent control device requiring operating
limits.
    (i) Descriptions of monitoring devices, monitoring frequencies and
operating scenarios.
    (ii) The established operating limit of the monitored parameter(s).
    (iii) The rationale for the established operating limit, including
any data and calculations used to develop the operating limit and a
description of why the operating limit indicates proper operation of
the control device.
    (iv) The rationale used to determine which format to use for your
operating limit (e.g., operating range, minimum operating level or
maximum operating level), where this subpart does not specify which
format to use.
    (3) For batch processes, you may establish operating limits for
individual batch emission episodes, including each distinct episode of
process vent emissions or each individual type of batch process that
generates wastewater, if applicable. You must provide rationale in a
batch precompliance report as specified in Sec.  63.11985(c)(2) instead
of the notification of compliance status for the established operating
limit. You must include any data and calculations used to develop the
operating limits and a description of why each operating limit
indicates proper operation of the control device during the specific
batch emission episode.
    (4) If you elect to establish separate operating limits for
different batch emission episodes within a batch process as specified
in paragraph (d)(3) of this section, you must maintain daily records
indicating each point at which you change from one operating limit to
another, even if the monitoring duration for an operating limit is less
than 15 minutes. You must maintain a daily record according to Sec.
63.11990(e)(4)(i).
    (e) Reduction of CPMS and CEMS data. You must reduce CEMS and CPMS
data to 1-hour averages according to Sec.  63.8(g) to compute the
average values for demonstrating compliance specified in Sec. Sec.
63.11925(e)(3)(ii), 63.11925(e)(4)(ii)(B), and 63.11960(c)(2) for CEMS
and CPMS, as applicable.

Sec.  63.11940  What continuous monitoring requirements must I meet for
control devices required to install CPMS to meet the emission limits
for process vents?

    As required in Sec.  63.11925(c), you must install and operate the
applicable CPMS specified in paragraphs (a) through (g) of this section
for each control device you use to comply with the emission limits for
process vents in Table 1 or 2 to this subpart. You must monitor,
record, and calculate CPMS data averages as specified in Table 7 to
this subpart. Paragraph (h) of this section provides an option to
propose alternative monitoring parameters or procedures.
    (a) Flow indicator. If flow to a control device could be
intermittent, you must install, calibrate, and operate a flow indicator
at the inlet or outlet of the control device to identify periods of no
flow.
    (b) Thermal oxidizer monitoring. If you are using a thermal
oxidizer to meet an emission limit in Table 1 or 2 to this subpart and
you are required to use CPMS as specified in Sec.  63.11925(c), you
must equip the thermal oxidizer with the monitoring equipment specified
in paragraphs (b)(1) through (3) of this section, as applicable.
    (1) If a thermal oxidizer other than a catalytic thermal oxidizer
is used, you must install a temperature monitoring device in the fire
box or in the ductwork immediately downstream of the fire box in a
position before any substantial heat exchange occurs.
    (2) Except as provided in paragraph (b)(3) of this section, where a
catalytic thermal oxidizer is used, you must install temperature
monitoring devices in the gas stream immediately before and after the
catalyst bed. You must monitor the temperature differential across the
catalyst bed.
    (3) Instead of complying with paragraph (b)(2) of this section, and
if the temperature differential between the inlet and outlet of the
catalytic thermal oxidizer during normal operating conditions is less
than 10 degrees Celsius (18 degrees Fahrenheit), you may elect to
monitor the inlet temperature and conduct catalyst checks as specified
in paragraphs (b)(3)(i) and (ii) of this section.
    (i) You must conduct annual sampling and analysis of the catalyst
activity (i.e., conversion efficiency) following the manufacturer's or
catalyst supplier's recommended procedures. If problems are found
during the catalyst activity test, you must replace the catalyst bed or
take other corrective action consistent with the manufacturer's
recommendations within 15 days or by the next time any process vent
stream is collected by the control device, whichever is sooner.
    (ii) You must conduct annual internal inspections of the catalyst
bed to check for fouling, plugging, or mechanical breakdown. You must
also inspect the bed for channeling, abrasion, and settling. If
problems are found during the annual internal inspection of the
catalyst, you must replace the catalyst bed or take other corrective
action consistent with the manufacturer's recommendations within 15
days or by the next time any process vent stream is collected by the
control device, whichever is later. If the catalyst bed is replaced and
is not of like or better kind and quality as the old catalyst then you
must conduct a new performance test according to Sec.  63.11945 to
determine destruction efficiency. If a catalyst bed is replaced and the
replacement catalyst is of like or better kind and quality as the old
catalyst, then a new performance test to determine destruction
efficiency is not required.
    (c) Absorber and acid gas scrubber monitoring. If you are using an
absorber or acid gas scrubber to meet an emission limit in Table 1 or 2
to this subpart and you are required to use CPMS as specified in Sec.
63.11925(c), you must install the monitoring equipment specified in
paragraphs (c)(1) through (3) of this section.
    (1) Install and operate the monitoring equipment as specified in
either paragraph (c)(1)(i) or (ii) of this section.
    (i) A flow meter to monitor the absorber or acid gas scrubber
influent liquid flow.
    (ii) A flow meter to monitor the absorber or acid gas scrubber
influent liquid flow and the gas stream flow using one of the
procedures specified in paragraphs (c)(1)(ii)(A), (B), or (C) of this
section. You must monitor the liquid-to-gas ratio determined by
dividing the flow rate of the absorber or acid gas scrubber influent by
the gas flow rate. The units of measure must be consistent with those
used to calculate this ratio during the performance test.
    (A) Determine gas stream flow using the design blower capacity,
with appropriate adjustments for pressure drop.
    (B) Measure the gas stream flow at the absorber or acid gas
scrubber inlet.
    (C) If you have previously determined compliance for a scrubber
that requires a determination of the liquid-to-gas ratio, you may use
the results of that test provided the test conditions are
representative of current operation.
    (2) Install and operate the monitoring equipment as specified in
either paragraph (c)(2)(i), (ii), or (iii) of this section.

    (i) Install and operate pressure gauges at the inlet and outlet of
the absorber or acid gas scrubber to monitor the pressure drop through
the absorber or acid gas scrubber.
    (ii) If the difference in the inlet gas stream temperature and the
inlet liquid stream temperature is greater than 38 degrees Celsius, you
may install and operate a temperature monitoring device at the scrubber
gas stream exit.
    (iii) If the difference between the specific gravity of the
scrubber effluent scrubbing fluid and specific gravity of the scrubber
inlet scrubbing fluid is greater than or equal to 0.02 specific gravity
units, you may install and operate a specific gravity monitoring device
on the inlet and outlet of the scrubber.
    (3) If the scrubbing liquid is a reactant (e.g., lime, ammonia
hydroxide), you must install and operate one of the devices listed in
either paragraph (c)(3)(i), (ii) or (iii) of this section.
    (i) A pH monitoring device to monitor the pH of the scrubber liquid
effluent.
    (ii) A caustic strength monitoring device to monitor the caustic
strength of the scrubber liquid effluent.
    (iii) A conductivity monitoring device to monitor the conductivity
of the scrubber liquid effluent.
    (d) Regenerative adsorber monitoring. If you are using a
regenerative adsorber to meet an emission limit in Table 1 or 2 to this
subpart and you are required to use CPMS as specified in Sec.
63.11925(c), you must install and operate the applicable monitoring
equipment listed in paragraphs (d)(1) through (5) of this section, and
comply with the requirements in paragraphs (d)(6) and (7) of this
section. If the adsorption system water is wastewater as defined in
Sec.  63.12005, then it is subject to the requirements of Sec.
63.11965.
    (1) For non-vacuum regeneration systems, an integrating
regeneration stream flow monitoring device having an accuracy of 10 percent, capable of recording the total regeneration stream
mass for each regeneration cycle. For non-vacuum regeneration systems,
an integrating regeneration stream flow monitoring device capable of
continuously recording the total regeneration stream mass flow for each
regeneration cycle.
    (2) For non-vacuum regeneration systems, an adsorber bed
temperature monitoring device, capable of continuously recording the
adsorber bed temperature after each regeneration and within 15 minutes
of completing any temperature regulation (cooling or warming to bring
bed temperature closer to vent gas temperature) portion of the
regeneration cycle.
    (3) For non-vacuum and non-steam regeneration systems, an adsorber
bed temperature monitoring device capable of continuously recording the
bed temperature during regeneration, except during any temperature
regulating (cooling or warming to bring bed temperature closer to vent
gas temperature) portion of the regeneration cycle.
    (4) For a vacuum regeneration system, a pressure transmitter
installed in the vacuum pump suction line capable of continuously
recording the vacuum level for each minute during regeneration. You
must establish a minimum target and a length of time at which the
vacuum must be below the minimum target during regeneration.
    (5) A device capable of monitoring the regeneration frequency
(i.e., operating time since last regeneration) and duration.
    (6) You must perform a verification of the adsorber during each day
of operation. The verification must be through visual observation or
through an automated alarm or shutdown system that monitors and records
system operational parameters. The verification must verify that the
adsorber is operating with proper valve sequencing and cycle time.
    (7) You must conduct weekly measurements of the carbon bed outlet
volatile organic compounds concentration over the last 5 minutes of an
adsorption cycle for each carbon bed. For regeneration cycles longer
than 1 week, you must perform the measurement over the last 5 minutes
of each adsorption cycle for each carbon bed. The outlet concentration
of volatile organic compounds must be measured using a portable
analyzer, in accordance with Method 21 at 40 CFR part 60, appendix A-7,
for open-ended lines. Alternatively, outlet concentration of HAP(s) may
be measured using chromatographic analysis using Method 18 at 40 CFR
part 60, appendix A-6.
    (e) Non-regenerative adsorber monitoring. If you are using a non-
regenerative adsorber, or canister type system that is sent off site
for regeneration or disposal, to meet an emission limit in Table 1 or 2
to this subpart and you are required to use CPMS as specified in Sec.
63.11925(c), you must install a system of dual adsorber units in series
and conduct the monitoring and bed replacement as specified in
paragraphs (e)(1) through (4) of this section.
    (1) Establish the average adsorber bed life by conducting daily
monitoring of the outlet volatile organic compound or HAP
concentration, as specified in this paragraph (e)(1), of the first
adsorber bed in series until breakthrough occurs for the first three
adsorber bed change-outs. The outlet concentration of volatile organic
compounds must be measured using a portable analyzer, in accordance
with Method 21 at 40 CFR part 60, appendix A-7, for open-ended lines.
Alternatively, outlet concentration of HAP may be measured using
chromatographic analysis using Method 18 at 40 CFR part 60, appendix A-
6. Breakthrough of the bed is defined as the time when the level of HAP
detected is at the highest concentration allowed to be discharged from
the adsorber system.
    (2) Once the average life of the bed is determined, conduct ongoing
monitoring as specified in paragraphs (e)(2)(i) through (iii) of this
section.
    (i) Except as provided in paragraphs (e)(2)(ii) and (iii) of this
section, conduct daily monitoring of the adsorber bed outlet volatile
organic compound or HAP concentration, as specified in paragraph (e)(1)
of this section.
    (ii) You may conduct monthly monitoring if the adsorbent has more
than 2 months of life remaining, as determined by the average primary
adsorber bed life, established in paragraph (e)(1) of this section, and
the date the adsorbent was last replaced.
    (iii) You may conduct weekly monitoring if the adsorbent has more
than 2 weeks of life remaining, as determined by the average primary
adsorber bed life, established in paragraph (e)(1) of this section, and
the date the adsorbent was last replaced.
    (3) The first adsorber in series must be replaced immediately when
breakthrough is detected between the first and second adsorber. The
original second adsorber (or a fresh canister) will become the new
first adsorber and a fresh adsorber will become the second adsorber.
For purposes of this paragraph (e)(3), ``immediately'' means within 8
hours of the detection of a breakthrough for adsorbers of 55 gallons or
less, and within 24 hours of the detection of a breakthrough for
adsorbers greater than 55 gallons.
    (4) In lieu of replacing the first adsorber immediately, you may
elect to monitor the outlet of the second canister beginning on the day
the breakthrough between the first and second canister is identified
and each day thereafter. This daily monitoring must continue until the
first canister is replaced. If the constituent being monitored is
detected at the outlet of the second canister during this period of
daily monitoring, both canisters must be replaced within 8 hours of the
time of detection of

volatile organic compounds or HAP at 90 percent of the allowed level
(90 percent of breakthrough definition).
    (f) Condenser monitoring. If you are using a condenser to meet an
emission limit in Table 1 or 2 to this subpart and you are required to
use CPMS as specified in Sec.  63.11925(c), you must install and
operate a condenser exit gas temperature monitoring device.
    (g) Other control devices. If you use a control device other than
those listed in this subpart to comply with an emission limit in Table
1 or 2 to this subpart and you are required to use CPMS as specified in
Sec.  63.11925(c), you must comply with the requirements as specified
in paragraphs (g)(1) and (2) of this section.
    (1) Submit a description of the planned monitoring, recordkeeping,
and reporting procedures. The Administrator will approve, deny or
modify the proposed monitoring, reporting and recordkeeping
requirements as part of the review of the plan or through the review of
the permit application or by other appropriate means.
    (2) You must establish operating limits for monitored parameters
that are approved by the Administrator. To establish the operating
limit, the information required in Sec.  63.11935(d) must be submitted
in the notification of compliance status report specified in Sec.
63.11985(a).
    (h) Alternatives to monitoring requirements. (1) You may request
approval to use alternatives to the continuous operating parameter
monitoring listed in this section, as specified in Sec. Sec.
63.11985(c)(4) and 63.8.
    (2) You may request approval to monitor a different parameter than
those established in Sec.  63.11935(d) or to set unique monitoring
parameters, as specified in Sec. Sec.  63.11985(c)(5) and 63.8. Until
permission to use an alternative monitoring parameter has been granted
by the Administrator, you remain subject to the requirements of this
subpart.

Sec.  63.11945  What performance testing requirements must I meet for
process vents?

    (a) General. For each control device used to meet the emission
limits for process vents in Table 1 or 2 to this subpart, you must
conduct the initial and periodic performance tests required in Sec.
63.11925(d) and (e) and as specified in Sec.  63.11896 using the
applicable test methods and procedures specified in Table 8 to this
subpart and paragraphs (b) through (d) of this section.
    (b) Process operating conditions. You must conduct performance
tests under the conditions specified in paragraphs (b)(1) through (3)
of this section, as applicable. Upon request, the owner or operator
shall make available to the Administrator such records as may be
necessary to determine the conditions of performance tests. In all
cases, a site-specific plan must be submitted to the Administrator for
approval prior to testing in accordance with Sec.  63.7(c). The test
plan must include the emission profiles described in Sec.  63.11925(g).
    (1) Continuous process vents. For continuous process vents, you
must conduct all performance tests at maximum representative operating
conditions for the process. For continuous compliance, you must conduct
subsequent performance tests within the range of operating limit(s)
that were established for the control device during the initial or
subsequent performance tests specified in Sec.  63.11925(d) and (e). If
an operating limit is a range, then you must conduct subsequent
performance tests within the range of maximum or minimum operating
limits for the control device, which result in highest emissions (i.e.,
lowest emission reduction).
    (2) Batch process operations. Testing must be conducted at absolute
worst-case conditions or hypothetical worst-case conditions as
specified in paragraph (c) of this section.
    (3) Combination of both continuous and batch unit operations. You
must conduct performance tests when the batch process vents are
operating at absolute worst-case conditions or hypothetical worst-case
conditions, as specified in paragraphs (c)(1) and (2) of this section,
and at maximum representative operating conditions for the process. For
continuous compliance, you must operate the control device as close as
possible to your operating limit(s) for the control device established
during the initial or subsequent performance tests specified in Sec.
63.11925 (d) and (e). If an operating limit is a range, then you must
operate the control device as close as possible to the maximum or
minimum operating limit for the control device, whichever results in
higher emissions (i.e., lower emission reduction), unless the
Administrator specifies or approves alternate operating conditions.
    (c) Batch worst-case conditions. The absolute worst-case conditions
for batch process operations must be characterized by the criteria
presented in paragraph (c)(1) of this section. The hypothetical worst-
case conditions for batch process operations must be characterized by
the criteria presented in paragraph (c)(2) of this section.
    (1) Absolute worst-case conditions. For batch process operations,
absolute worst-case conditions are defined by the criteria presented in
paragraph (c)(1)(i) of this section if the maximum load is the most
challenging condition for the control device. Otherwise, absolute
worst-case conditions are defined by the conditions in paragraph
(c)(1)(ii) of this section. You must consider all relevant factors,
including load and compound-specific characteristics in defining
absolute worst-case conditions.
    (i) A 1-hour period of time in which the inlet to the control
device contains the highest HAP mass loading rate, in pounds per hour,
capable of being vented to the control device. An emission profile as
described in Sec.  63.11925(g) must be used to identify the 1-hour
period of maximum HAP loading.
    (ii) The period of time when the HAP loading or stream composition
(including non-HAP) is most challenging for the control device. These
conditions include, but are not limited to the following:
    (A) Periods when the stream contains the highest combined organic
load, in pounds per hour, described by the emission profiles in Sec.
63.11925(g).
    (B) Periods when the streams contain HAP constituents that approach
limits of solubility for scrubbing media.
    (C) Periods when the streams contain HAP constituents that approach
limits of adsorptivity for adsorption systems.
    (2) Hypothetical worst-case conditions. For batch process
operations, hypothetical worst-case conditions are simulated test
conditions that, at a minimum, contain the highest hourly HAP load of
emissions that would be predicted to be vented to the control device
based on the emissions profiles described in paragraphs (c)(3)(ii) or
(iii) of this section.
    (3) Emission profile. For batch process operations, you must
develop an emission profile for the vent to the control device that
describes the characteristics of the vent stream at the inlet to the
control device under worst-case conditions. The emission profile must
be developed based on any one of the procedures described in paragraphs
(c)(3)(i) through (iii) of this section.
    (i) Emission profile by process. The emission profile must consider
all batch emission episodes that could contribute to the vent stack for
a period of time that is sufficient to include all processes venting to
the stack and must consider production scheduling. The profile must
describe the HAP load to the device that equals the highest sum of
emissions from the episodes that can vent to the control device in any
given hour.

Emissions per episode must be calculated using the procedures specified
in Sec.  63.11950. Emissions per episode must be divided by the
duration of the episode only if the duration of the episode is longer
than 1 hour.
    (ii) Emission profile by equipment. The emission profile must
consist of emissions that meet or exceed the highest emissions, in
pounds per hour that would be expected under actual processing
conditions. The profile must describe equipment configurations used to
generate the emission events, volatility of materials processed in the
equipment, and the rationale used to identify and characterize the
emission events. The emissions may be based on using a compound more
volatile than compounds actually used in the process(es), and the
emissions may be generated from all equipment in the process(es) or
only selected equipment.
    (iii) Emission profile by capture and control device limitation.
The emission profile must consider the capture and control system
limitations and the highest emissions, in pounds per hour that can be
routed to the control device, based on maximum flow rate and
concentrations possible because of limitations on conveyance and
control equipment (e.g., fans and lower explosive level alarms).
    (d) Concentration correction calculation. If a combustion device is
the control device and supplemental combustion air is used to combust
the emissions, the concentration of total hydrocarbons, total organic
HAP, vinyl chloride, and hydrogen chloride must be corrected as
specified in paragraph (d)(1) or (2) of this section. If a control
device other than a combustion device is used to comply with an outlet
concentration emission limit for batch process vents, you must correct
the actual concentration for supplemental gases as specified in
paragraph (d)(3) of this section.
    (1) Determine the concentration of total hydrocarbons, total
organic HAP, vinyl chloride, or hydrogen chloride corrected to 3-
percent oxygen (Cc) using Equation 1 of this section.
[GRAPHIC] [TIFF OMITTED] TR17AP12.002

Where:

Cc = Concentration of total hydrocarbons, total organic
HAP, vinyl chloride, or hydrogen chloride corrected to 3-percent
oxygen, dry basis, parts per million by volume.
Cm = Concentration of total hydrocarbons, total organic
HAP, vinyl chloride, or hydrogen chloride, dry basis, parts per
million by volume.
%O2d = Concentration of oxygen, dry basis, percentage by
volume.

    (2) To determine the oxygen concentration, you must use the
emission rate correction factor (or excess air), integrated sampling
and analysis procedures of Method 3, 3A, or 3B at 40 CFR part 60,
appendix A-2, or ANSI/ASME PTC 19.10-1981 (incorporated by reference,
see Sec.  63.14).
    (3) Correct the measured concentration for supplemental gases using
Equation 2 of this section. Process knowledge and representative
operating data may be used to determine the fraction of the total flow
due to supplemental gas.
[GRAPHIC] [TIFF OMITTED] TR17AP12.003

Where:

Ca = Corrected outlet concentration of HAP, dry basis,
parts per million by volume (ppmv).
Cm = Actual concentration of HAP measured at control
device outlet, dry basis, ppmv.
Qa = Total volumetric flow rate of all gas streams vented
to the control device, except supplemental gases.
Qs = total volumetric flow rate of supplemental gases.

Sec.  63.11950  What emissions calculations must I use for an emission
profile?

    When developing your emission profiles for batch process vents as
required in Sec.  63.11925(g), except as specified in paragraph (i) of
this section, you must calculate emissions from episodes caused by
vapor displacement, purging a partially filled vessel, heating,
depressurization, vacuum operations, gas evolution, air drying, or
empty vessel purging, using the applicable procedures in paragraphs (a)
through (h) of this section.
    (a) Vapor displacement. You must calculate emissions from vapor
displacement due to transfer of material using Equation 1 of this
section.
[GRAPHIC] [TIFF OMITTED] TR17AP12.004

(Eq. 1)Where:

E = Mass of HAP emitted.
V = Volume of gas displaced from the vessel.
R = Ideal gas law constant.
T = Temperature of the vessel vapor space; absolute.
Pi = Partial pressure of the individual HAP.
MWi = Molecular weight of the individual HAP.
n = Number of HAP compounds in the emission stream.
i = Identifier for a HAP compound.

    (b) Gas sweep of a partially filled vessel. You must calculate
emissions from purging a partially filled vessel using Equation 2 of
this section. The pressure of the vessel vapor space may be set equal
to 760 millimeters of

mercury (mmHg). You must multiply the HAP partial pressure in Equation
2 of this section by a HAP-specific saturation factor determined in
accordance with Equations 3 through 5 of this section. Solve Equation 3
of this section iteratively beginning with saturation factors (in the
right-hand side of the equation) of 1.0 for each condensable compound.
Stop iterating when the calculated saturation factors for all compounds
are the same to two significant figures for subsequent iterations. Note
that for multi-component emission streams, saturation factors must be
calculated for all condensable compounds, not just the HAP.
[GRAPHIC] [TIFF OMITTED] TR17AP12.005

(Eq. 2)Where:

E = Mass of HAP emitted.
V = Purge flow rate of the noncondensable gas at the temperature and
pressure of the vessel vapor space.
R = Ideal gas law constant.
T = Temperature of the vessel vapor space; absolute.
Pi = Partial pressure of the individual HAP at saturated
conditions.
Pj = Partial pressure of individual condensable compounds
(including HAP) at saturated conditions.
PT = Pressure of the vessel vapor space.
MWi = Molecular weight of the individual HAP.
t = Time of purge.
n = Number of HAP compounds in the emission stream.
i = Identifier for a HAP compound.
j = Identifier for a condensable compound.
m = Number of condensable compounds (including HAP) in the emission
stream.
[GRAPHIC] [TIFF OMITTED] TR17AP12.006

Where:

Si = Saturation factor for individual condensable
compounds.
Pi = Partial pressure of individual condensable compounds
at saturated conditions.
PT = Pressure of the vessel vapor space.
A = Surface area of liquid.
V = Purge flow rate of the noncondensable gas.
Vi\sat\ = Volumetric flow rate of individual condensable
compounds at saturated vapor pressure.
Ki = Mass transfer coefficient of individual condensable
compounds in the emission stream.
Ko = Mass transfer coefficient of reference compound
(e.g., 0.83 cm/s for water).
Mo = Molecular weight of reference compound (e.g., 18.02
for water).
Mi = Molecular weight of individual condensable compounds
in the emission stream.
n = Number of condensable compounds in the emission stream.

    (c) Heating. You must calculate emissions caused by the heating of
a vessel to a temperature lower than the boiling point using the
procedures in paragraph (c)(1) of this section. If the contents of a
vessel are heated to the

boiling point, you must calculate emissions using the procedures in
paragraph (c)(2) of this section.
    (1) If the final temperature to which the vessel contents are
heated is lower than the boiling point of the HAP in the vessel, you
must calculate the mass of HAP emitted per episode using Equation 6 of
this section. The average gas space molar volume during the heating
process is calculated using Equation 7 of this section. The difference
in the number of moles of condensable in the vessel headspace between
the initial and final temperatures is calculated using Equation 8 of
this section.
[GRAPHIC] [TIFF OMITTED] TR17AP12.007

 (Eq. 6)Where:

E = Mass of HAP vapor displaced from the vessel being heated.
Navg = Average gas space molar volume during the heating
process.
PT = Total pressure in the vessel.
Pi,1 = Partial pressure of the individual HAP compounds
at initial temperature (T1).
Pi,2 = Partial pressure of the individual HAP compounds
at final temperature (T2).
MWHAP = Average molecular weight of the HAP compounds
calculated using Equation 13 of this section.
ni,1 = Number of moles of condensable in the vessel
headspace at initial temperature (T1).
ni,2 = Number of moles of condensable in the vessel
headspace at final temperature (T2).
n = Number of HAP compounds in the emission stream.
ln = Natural logarithm.
[GRAPHIC] [TIFF OMITTED] TR17AP12.008

(Eq. 7)Where:

Navg = Average gas space molar volume during the heating
process.
V = Volume of free space in vessel.
PT = Total pressure in the vessel.
R = Ideal gas law constant.
T1 = Initial temperature of the vessel.
T2 = Final temperature of the vessel.
[GRAPHIC] [TIFF OMITTED] TR17AP12.009

Where:

V = Volume of free space in vessel.
R = Ideal gas law constant.
T1 = Initial temperature in the vessel.
T2 = Final temperature in the vessel.
Pi,1 = Partial pressure of the individual HAP compounds
at T1.
Pi,2 = Partial pressure of the individual HAP compounds
at T2.
n = Number of HAP compounds in the emission stream.

    (2) If the final temperature to which the vessel contents are
heated is at the boiling point or higher, you must calculate emissions
using the procedure in paragraphs (c)(2)(i) and (ii) of this section.
    (i) To calculate the emissions from heating to the boiling point
use Equations 9, 10 and 11 of this section. (Note that Pa2 =
0 in the calculation of [Delta][eta] in Equation 10 of this section.)
[GRAPHIC] [TIFF OMITTED] TR17AP12.010

Where:

E = Mass of HAP emitted.
[Delta][eta] = The number of moles of noncondensable displaced from
the vessel, as calculated using Equation 10 of this section.
PT = Pressure in the receiver.

Pi = Partial pressure of the individual HAP determined at
the exit temperature of the condenser or at the conditions of the
dedicated receiver.
Pj = Partial pressure of the individual condensable
(including HAP) determined at the exit temperature of the condenser
or at the conditions of the dedicated receiver.
n = Number of HAP compounds in the emission stream.
i = Identifier for a HAP compound.
j = Identifier for a condensable compound.
MWHAP = The average molecular weight of HAP in vapor
exiting the dedicated receiver, as calculated using Equation 11 of
this section with partial pressures determined at the exit
temperature and exit pressure conditions of the condenser or at the
conditions of the dedicated receiver.
m = Number of condensable compounds (including HAP) in the emission
stream.
[GRAPHIC] [TIFF OMITTED] TR17AP12.011

[GRAPHIC] [TIFF OMITTED] TR17AP12.012

Where:

[Delta][eta] = Number of moles of noncondensable gas displaced from
the vessel.
V = Volume of free space in the vessel.
R = Ideal gas law constant.
T1 = Initial temperature of vessel contents, absolute.
T2 = Final temperature of vessel contents, absolute.
Pan = Partial pressure of noncondensable gas in the vessel headspace
at initial (n=1) and final (n=2) temperature.
MWHAP = The average molecular weight of HAP in vapor
exiting the dedicated receiver.
(Pi)Tn = Partial pressure of each HAP in the vessel
headspace at initial (T1) and final (T2)
temperature of the receiver.
MWi = Molecular weight of the individual HAP.
n = Number of HAP compounds in the emission stream.
i = Identifier for a HAP compound.

    (ii) While boiling, the vessel must be operated with a properly
operated process condenser. An initial demonstration that a process
condenser is properly operated must be conducted during the boiling
operation and documented in the notification of compliance status
report described in Sec.  63.11985(a). You must either measure the
liquid temperature in the receiver or the temperature of the gas stream
exiting the condenser and show it is less than the boiling or bubble
point of the HAP in the vessel; or perform a material balance around
the vessel and condenser and show that at least 99 percent of the
recovered HAP vaporized while boiling is condensed. This demonstration
is not required if the process condenser is followed by a condenser
acting as a control device or if the control device is monitored using
a CEMS.
    (d) Depressurization. You must calculate emissions from
depressurization using Equation 12 of this section.
[GRAPHIC] [TIFF OMITTED] TR17AP12.013

Where:

E = Emissions.
V = Free volume in vessel being depressurized.
R = Ideal gas law constant.
T = Temperature of the vessel, absolute.
P1 = Initial pressure in the vessel.
P2 = Final pressure in the vessel.
Pj = Partial pressure of the individual condensable
compounds (including HAP).
MWi = Molecular weight of the individual HAP compounds.
n = Number of HAP compounds in the emission stream.
m = Number of condensable compounds (including HAP) in the emission
stream.
i = Identifier for a HAP compound.
j = Identifier for a condensable compound.
ln = Natural logarithm.

    (e) Vacuum systems. You must calculate emissions from vacuum
systems using Equation 13 of this section if the air leakage rate is
known or can be approximated. The receiving vessel is part of the
vacuum system for purposes of this subpart.

[GRAPHIC] [TIFF OMITTED] TR17AP12.014

Where:

E = Mass of HAP emitted.
PT = Absolute pressure of receiving vessel or ejector
outlet conditions, if there is no receiver.
Pi = Partial pressure of the HAP at the receiver
temperature or the ejector outlet conditions.
Pj = Partial pressure of condensable (including HAP) at
the receiver temperature or the ejector outlet conditions.
La = Total air leak rate in the system, mass/time.
MWnc = Molecular weight of noncondensable gas.
t = Time of vacuum operation.
MWi = Molecular weight of the individual HAP in the emission stream,
with HAP partial pressures calculated at the temperature of the
receiver or ejector outlet, as appropriate.

(f) Gas evolution. You must calculate emissions from gas evolution
using Equation 13 in paragraph (e) of this section with mass flow rate
of gas evolution, Wg, substituted for La.
(g) Air drying. You must calculate emissions from air drying using
Equation 14 of this section:
[GRAPHIC] [TIFF OMITTED] TR17AP12.015

Where:

E = Mass of HAP emitted.
B = Mass of dry solids.
PS1 = HAP in material entering dryer, weight percent.
PS2 = HAP in material exiting dryer, weight percent.

    (h) Empty vessel purging. You must calculate emissions from empty
vessel purging using Equation 15 of this section (Note: The term e-Ft/v
can be assumed to be 0):
[GRAPHIC] [TIFF OMITTED] TR17AP12.016

Where:

V = Volume of empty vessel.
R = Ideal gas law constant.
T = Temperature of the vessel vapor space; absolute.
Pi = Partial pressure of the individual HAP at the
beginning of the purge.
MWi = Molecular weight of the individual HAP.
F = Flow rate of the purge gas.
t = Duration of the purge.
n = Number of HAP compounds in the emission stream.
i = Identifier for a HAP compound.

    (i) Engineering assessments. You must conduct an engineering
assessment to calculate HAP emissions or emission episodes from each
process vent that are not due to vapor displacement, partially filled
vessel purging, heating, depressurization, vacuum operations, gas
evolution, air drying or empty vessel purging. An engineering
assessment may also be used to support a finding that the emissions
estimation equations in this section are inappropriate. All data,
assumptions and procedures used in the engineering assessment must be
documented, are subject to preapproval by the Administrator, and must
be reported in the batch precompliance report. An engineering
assessment should include, but is not limited to, the items listed in
paragraphs (i)(1) through (4) of this section.
    (1) Previous test results provided the tests are representative of
current operating practices at the process unit.
    (2) Bench-scale or pilot-scale test data representative of the
process under representative operating conditions.
    (3) Maximum flow rate, HAP emission rate, concentration, or other
relevant parameter specified or implied within a permit limit
applicable to the process vent.
    (4) Design analysis based on accepted chemical engineering
principles, measurable process parameters, or physical or chemical laws
or properties. Examples of analytical methods include, but are not
limited to the following:
    (i) Use of material balances based on process stoichiometry to
estimate maximum organic HAP concentrations.
    (ii) Estimation of maximum flow rate based on physical equipment
design such as pump or blower capacities.
    (iii) Estimation of HAP concentrations based on saturation
conditions.

Sec.  63.11955  What are my initial and continuous compliance
requirements for other emission sources?

    (a) Before opening any process component (including pre-
polymerization reactors used in the manufacture of bulk resins) for any
reason, the quantity of vinyl chloride must be reduced to an amount
that occupies a volume of no more than 2.0 percent of the component's
or equipment's containment volume, or 25 gallons, whichever is larger,
at standard temperature and pressure.
    (b) Before opening a polymerization reactor for any reason, the
quantity of vinyl chloride is not to exceed 0.04 pounds per ton of PVC
product, with the product determined on a dry solids basis.
    (c) Any gas or vapor HAP removed from a process component in

accordance with paragraphs (a) and (b) of this section must be vented
to a closed vent system and control device meeting the requirements of
Sec. Sec.  63.11925 through 63.11950.
    (d) Each gasholder in vinyl chloride service must meet the
requirements of paragraphs (d)(1) through (3) of this section.
    (1) Each gasholder must be vented to a closed vent system and
control device meeting the requirements of Sec. Sec.  63.11925 through
63.11950.
    (2) Each gasholder must operate with one or more of the following
installed on the water seal to reduce emissions:
    (i) Floating balls;
    (ii) Hollow floating disks;
    (iii) Oil layer; and/or
    (iv) Floating mats.
    (3) Each gasholder must have established operating procedures that
include provisions for ensuring that the requirements of paragraph
(d)(2) of this section are met at all times except during periods of
maintenance or repair. The standard operating procedures must be
developed and implemented and made available to the Administrator upon
request.

Sec.  63.11956  What are my compliance requirements for ambient
monitoring?

    You must operate a reliable and accurate vinyl chloride monitoring
system for detection of major leaks and identification of the general
area of the affected source where a leak is located. A vinyl chloride
monitoring system means a device which obtains air samples from one or
more points on a continuous sequential basis and analyzes the samples
with gas chromatography or, if you assume that all hydrocarbons
measured are vinyl chloride, analyzes the samples with infrared
spectrophotometry, flame ion detection, or an equivalent or alternative
method. You must operate the vinyl chloride monitoring system according
to a program that you develop for your affected source. You must submit
a description of the program to the Administrator within 45 days of
your compliance date, unless a waiver of compliance is granted by the
Administrator, or the program has been approved and the Administrator
does not request a review of the program. Approval of a program will be
granted by the Administrator provided the Administrator finds:
    (a) The location and number of points to be monitored and the
frequency of monitoring provided for in the program are acceptable when
they are compared with the number of pieces of equipment in vinyl
chloride service and size and physical layout of the affected source.
    (b) It contains a definition of leak which is acceptable when
compared with the background concentrations of vinyl chloride in the
areas of the plant to be monitored by the vinyl chloride monitoring
system. Measurements of background concentrations of vinyl chloride in
the areas of the plant to be monitored by the vinyl chloride monitoring
system are to be included with the description of the program. The
definition of leak for a given plant may vary among the different areas
within the plant and is also to change over time as background
concentrations in the plant are reduced.
    (c) It contains an acceptable plan of action to be taken when a
leak is detected.
    (d) It provides for an acceptable calibration and maintenance
schedule for the vinyl chloride monitoring system and portable
hydrocarbon detector. For the vinyl chloride monitoring system, a daily
span check must be conducted with a concentration of vinyl chloride
equal to the concentration defined as a leak according to paragraph (b)
of this section. The calibration must be done with either:
    (1) A calibration gas mixture prepared from the gases specified in
sections 7.2.1 and 7.2.2 of Method 106 at 40 CFR part 61, appendix B,
and in accordance with section 10.1 of Method 106, or
    (2) A calibration gas cylinder standard containing the appropriate
concentration of vinyl chloride. The gas composition of the calibration
gas cylinder standard must have been certified by the manufacturer. The
manufacturer must have recommended a maximum shelf life for each
cylinder so that the concentration does not change greater than 5 percent from the certified value. The date of gas cylinder
preparation, certified vinyl chloride concentration, and recommended
maximum shelf life must have been affixed to the cylinder before
shipment from the manufacturer to the buyer. If a gas chromatograph is
used as the vinyl chloride monitoring system, these gas mixtures may be
directly used to prepare a chromatograph calibration curve as described
in Sections 8.1 and 9.2 of Method 106. The requirements in Sections
<IP_ADDRESS> and <IP_ADDRESS> of Method 106 for certification of cylinder
standards and for establishment and verification of calibration
standards are to be followed.

Sec.  63.11960  What are my initial and continuous compliance
requirements for stripped resin?

    (a) Emission limits. You must meet the applicable vinyl chloride
and total non-vinyl chloride organic HAP emission limits for stripped
resin specified in Table 1 or 2 to this subpart.
    (b) Determination of total non-vinyl chloride organic HAP. You must
develop a facility-specific list of HAP that are expected to be present
in each grade of resin produced by your PVCPU. This list must be
continuously updated and must be available for inspection by the
Administrator. This list must include the identification of each grade
of resin produced, each HAP expected to be present in that grade of
resin, and the CAS number for each HAP.
    (1) For the purposes of demonstrating initial and continuous
compliance as required in paragraphs (c) and (d) of this section, you
must meet the requirements specified in paragraphs (b)(1)(i) and
(b)(1)(ii) of this section.
    (i) You must analyze each resin sample for all Table 10 HAP using
the test methods specified in paragraph (e) of this section.
    (ii) You must also analyze each resin sample for any HAP that are
not a Table 10 HAP but are expected to be present in that resin sample
based on your facility-specific list of HAP using the appropriate test
method specified in paragraph (e) of this section.
    (2) [Reserved]
    (c) Demonstration of initial compliance. You must demonstrate
initial compliance for each resin stripper or for each group of resin
strippers used to process the same resin type.
    (1) You must conduct an initial performance test for the resin
stripper, measuring the concentration of vinyl chloride and total non-
vinyl chloride organic HAP in the stripped resin at the outlet of each
resin stripper as specified in paragraphs (c)(1)(i) through (iv) of
this section.
    (i) Use the test method(s) and procedures specified in paragraph
(e) of this section.
    (ii) Collect samples when the PVCPU is producing the resin grade of
which you manufacture the most, based on the total mass per resin grade
of a given resin type produced in the 12 months preceding the sampling
event.
    (iii) For continuous processes, during a 24-hour sampling period,
for each resin grade produced, collect 1 grab sample at intervals of 8
hours or per grade of PVC produced, whichever is more frequent. Each
sample must be taken as the resin flows out of the stripper.
    (iv) For batch processes, during a 24-hour sampling period, for
each batch of each resin grade produced, collect 1 grab sample for each
batch. Each sample must be taken immediately following

the completion of the stripping operation.
    (2) Demonstrate initial compliance with the vinyl chloride and
total non-vinyl chloride organic HAP emission limits in Table 1 or 2 to
this subpart as specified in paragraphs (c)(2)(i) and (ii) of this
section.
    (i) Calculate the 24-hour arithmetic average vinyl chloride and
total non-vinyl chloride organic HAP concentrations for each stripper
for each resin grade produced during the 24-hour sampling period, using
the vinyl chloride and non vinyl-chloride HAP concentrations measured
for the grab samples collected as specified in paragraph (c)(1)(iii)
and (iv) of this section and using the calculation procedure specified
in paragraph (f) of this section to determine the total non-vinyl
chloride organic HAP concentration of each sample.
    (ii) Demonstrate compliance with the vinyl chloride and total non-
vinyl chloride organic HAP emission limits in Table 1 or 2 to this
subpart based on the 24-hour arithmetic average concentrations
calculated in either paragraph (c)(2)(ii)(A) or (B) of this section.
    (A) If more than one resin grade was produced during the 24-hour
sampling period, use Equation 1 of this section to calculate the 24-
hour grade weighted arithmetic average vinyl chloride and total non-
vinyl chloride organic HAP concentrations for each stripper, or for
each group of strippers used to process the same type of resin, using
the 24-hour average vinyl chloride and total non-vinyl chloride organic
HAP concentrations calculated in paragraph (c)(2)(i) of this section
and the mass of each resin grade produced during the 24-hour sampling
period.
[GRAPHIC] [TIFF OMITTED] TR17AP12.017

Where:

AT = 24-hour average concentration of resin type T, parts
per million by weight (dry basis).
PGi = Production of resin grade Gi, pounds.
CGi = 24-hour average concentration of vinyl chloride or
total non-vinyl chloride organic HAP in resin grade Gi,
ppmw.
QT = Total production of resin type T over the 24-hour
sampling period, pounds.

    (B) If only one resin grade was produced during the 24-hour
sampling event, use the 24-hour arithmetic average vinyl chloride and
total non-vinyl chloride organic HAP concentrations for the one resin
grade calculated as specified in paragraph (c)(2)(i) of this section
for each stripper or calculate the 24-hour arithmetic average vinyl
chloride and total non-vinyl chloride organic HAP concentrations for
all strippers used to process the one grade of resin.
    (d) Demonstration of continuous compliance. You must demonstrate
continuous compliance for each resin stripper or for each group of
resin strippers used to process the same resin type.
    (1) On a daily basis, you must measure the concentration of vinyl
chloride in stripped resin using the test method(s) and procedures
specified in paragraph (e) of this section, and the procedures
specified in paragraphs (c)(1)(iii) and (iv) of this section.
    (2) On a monthly basis, you must measure the concentration of total
non-vinyl chloride organic HAP in stripped resin using the test
method(s) and procedures specified in paragraph (e) of this section,
and the procedures specified in paragraphs (c)(1)(iii) and (iv) of this
section.
    (3) You must demonstrate continuous compliance with the vinyl
chloride and total non-vinyl chloride organic HAP emission limit for
stripped resin in Table 1 or 2 to this subpart as specified in
paragraphs (c)(2)(i) and (ii) of this section.
    (e) Test methods and procedures for determining concentration of
vinyl chloride and total non-vinyl chloride organic HAP. You must
determine the concentration of vinyl chloride and total non-vinyl
chloride organic HAP using the test methods and procedures specified in
paragraphs (e)(1) through (3) of this section. Upon request, the owner
or operator shall make available to the Administrator such records as
may be necessary to determine the conditions of performance tests.
    (1) For measuring total non-vinyl chloride organic HAP, you must
use the methods specified in paragraphs (e)(1)(i) through (iv) of this
section.
    (i) SW-846-8260B (incorporated by reference, see Sec.  63.14) for
analysis of volatile organic compounds listed in Table 10 of this
subpart.
    (ii) SW-846-8270D (incorporated by reference, see Sec.  63.14) for
analysis of semivolatile organic compounds listed in table 10 of this
subpart.
    (iii) SW-846-8315A (incorporated by reference, see Sec.  63.14) for
analysis of aldehyde compounds listed in table 10 of this subpart.
    (iv) SW-846-8015C (incorporated by reference, see Sec.  63.14) for
analysis of alcohol compounds listed in table 10 of this subpart.
    (2) For measuring vinyl chloride, you must use Method 107 at 40 CFR
part 61, appendix B.
    (3) When using the methods specified in paragraphs (e)(1) and (2)
of this section, for sample collection, preservation, transport, and
analysis, you must minimize loss of HAP and maintain sample integrity.
    (f) Method for calculating total non-vinyl chloride organic HAP
concentration. For each stripped resin sample analyzed using the
methods specified in paragraph (e) of this section, calculate the sum
of the measured concentrations of each HAP analyzed as required in
paragraphs (b)(1)(i) and (b)(1)(ii) of this section by using Equation 2
to this section.
[GRAPHIC] [TIFF OMITTED] TR17AP12.018

Where:
CTNVCH = Concentration of total non-vinyl chloride
organic HAP compounds in the stripped resin sample, in parts per
million by weight (ppmw).
Ci = Concentration of individual HAP present in the
stripped resin sample analyzed pursuant to paragraphs (b)(1)(i) and
(b)(1)(ii) of this section excluding vinyl chloride, in ppmw, where
a value of zero should be used for any HAP concentration that is
below the detection limit.

Sec.  63.11965  What are my general compliance requirements for
wastewater?

    (a) The concentration of vinyl chloride and total non-vinyl
chloride organic HAP in each process wastewater stream containing
greater than the limits specified in Table 1 or 2 to this subpart,
measured immediately as it leaves a piece of process equipment and
before being mixed with any other process wastewater stream, must be
reduced to the limits specified in Table 1 or 2 to this subpart. The
applicable limits in

Table 1 or 2 to this subpart must be met before the process wastewater
stream is mixed with any other process wastewater stream containing
vinyl chloride or total non-vinyl chloride organic HAP concentrations
less than the applicable limits specified in Table 1 or 2 to this
subpart, before being exposed to the atmosphere, and before being
discharged from the affected source.
    (b) Initial determination of process wastewater streams that need
to be treated. You must determine which process wastewater streams
require treatment as specified in paragraphs (b)(1) and (2) of this
section and meet the requirements of paragraphs (c) and (d) of this
section.
    (1) You must collect process wastewater samples as specified in
paragraphs (b)(1)(i) and (ii) of this section.
    (i) For treated process wastewater streams, you must collect
process wastewater samples at the outlet of the treatment process and
before the process wastewater stream is mixed with any other process
wastewater stream containing vinyl chloride or total non-vinyl chloride
organic HAP concentrations less than the applicable limits specified in
Table 1 or 2 to this subpart, before being exposed to the atmosphere,
and before being discharged from the affected source.
    (ii) For untreated process wastewater streams, you must collect
process wastewater samples at the location immediately as the stream
leaves a piece of process equipment, before being mixed with any other
process stream or process wastewater stream, before being exposed to
the atmosphere, and before being discharged from the affected source.
    (2) You must measure the concentration of vinyl chloride and total
non-vinyl chloride organic HAP using the test methods and procedures
specified in Sec.  63.11980.
    (c) Requirements for process wastewater streams that must be
treated. Each process wastewater stream that has a vinyl chloride or
total non-vinyl chloride organic HAP concentration equal to or greater
than the limits specified in Table 1 or 2 to this subpart, determined
pursuant to paragraph (a) of this section must be treated to reduce the
concentration of vinyl chloride or total non-vinyl chloride organic HAP
to below the applicable limits specified in Table 1 or 2 to this
subpart. You must route wastewater streams through hard-piping to the
treatment process and route the vent stream from the treatment process
to a closed vent system and control device meeting the requirements of
Sec. Sec.  63.11925 through 63.11950. You must also meet the initial
and continuous compliance requirements specified in Sec.  63.11970(a)
and Sec.  63.11975.
    (d) Requirements for process wastewater streams that do not need to
be treated. For each process wastewater stream that has a vinyl
chloride or total non-vinyl chloride organic HAP concentration less
than the limits specified in Table 1 or 2 to this subpart, determined
pursuant to paragraph (a) of this section, you must meet the initial
and continuous compliance requirements specified in Sec. Sec.
63.11970(b) and 63.11975(c).
    (e) Maintenance wastewater. You must comply with the requirements
specified in Sec.  63.105 of subpart F of this part.
    (f) Determination of total non-vinyl chloride organic HAP. You must
develop a facility-specific list of HAP that are expected to be present
in each process wastewater stream at your PVCPU. This list must be
continuously updated and must be available for inspection by the
Administrator. This list must include the identification of each HAP
expected to be present in each process wastewater stream, and the CAS
number for each HAP.
    (1) For the purposes of demonstrating initial and continuous
compliance as required in Sec. Sec.  63.11970 and 63.11975 of this
subpart, you must meet the requirements specified in paragraphs
(f)(1)(i) and (ii) of this section.
    (i) You must analyze each process wastewater sample for all HAP
listed in Table 10 to this subpart using the test methods specified in
Sec.  63.11980(a)(2) and (3).
    (ii) You must also analyze each process wastewater sample for any
HAP that are not listed in Table 10 to this subpart but are expected to
be present in that sample based on your facility-specific list of HAP
using the appropriate test method specified in Sec.  63.11980(a)(2).
    (2) [Reserved]

Sec.  63.11970  What are my initial compliance requirements for process
wastewater?

    (a) Demonstration of initial compliance for process wastewater
streams that must be treated. For each process wastewater stream that
must be treated as specified in Sec.  63.11965(b) and (c), you must
conduct an initial performance test for the wastewater treatment
process, measuring the concentration of vinyl chloride and total non-
vinyl chloride organic HAP in the wastewater stream at the outlet of
the wastewater treatment process before the wastewater is exposed to
the atmosphere, mixed with any other process stream, and before being
discharged from the affected facility, using the test method(s) and
procedures specified in Sec.  63.11980(a).
    (b) Demonstration of initial compliance for process wastewater
streams that are not required to be treated. For each process
wastewater stream that has a vinyl chloride or total non-vinyl chloride
organic HAP concentration less than the limits specified in Tables 1 or
2 to this subpart, you must use the measurement specified in Sec.
63.11965(b)(1)(ii) to demonstrate initial compliance.

Sec.  63.11975  What are my continuous compliance requirements for
process wastewater?

    (a) For each process wastewater stream that must be treated to
reduce the concentration of vinyl chloride or total non-vinyl chloride
organic HAP as specified in Sec.  63.11965(b) and (c), you must
demonstrate continuous compliance as specified in paragraph (b) of this
section. For each process wastewater stream for which you initially
determine in Sec.  63.11970(b) that treatment is not required to reduce
either vinyl chloride or total non-vinyl chloride organic HAP
concentration, you must demonstrate continuous compliance as specified
in paragraph (c) of this section.
    (b) For each process wastewater stream that must be treated
according to Sec.  63.11965(b), you must demonstrate continuous
compliance with the emission limits for vinyl chloride and total non-
vinyl chloride organic HAP specified in Table 1 or 2 to this subpart by
following the procedures specified in paragraphs (b)(1) and (2) of this
section.
    (1) Following your demonstration of initial compliance in Sec.
63.11970(a), make monthly measurements of the vinyl chloride and total
non-vinyl chloride organic HAP concentrations using the procedures and
methods specified in Sec.  63.11965(b)(1) and (2).
    (2) You must demonstrate continuous compliance with the emission
limits in Table 1 or 2 to this subpart on a monthly basis, using the
monthly concentration measurement specified in paragraph (b)(1) of this
section.
    (c) For each wastewater stream for which you initially determine in
Sec.  63.11970(b) that treatment is not required to reduce the vinyl
chloride or total non-vinyl chloride organic HAP concentration, you
must demonstrate continuous compliance as specified in paragraphs
(c)(1) and (2) of this section.
    (1) Conduct annual performance tests, measuring the vinyl chloride
and total

non-vinyl chloride organic HAP concentrations using the procedures and
methods specified in Sec.  63.11965(b)(1) and (2).
    (2) If any annual performance test conducted as specified in
paragraph (c)(1) of this section results in a concentration of vinyl
chloride or total non-vinyl chloride organic HAP in the process
wastewater stream that is greater than or equal to the emission limits
in Table 1 or 2 to this subpart, then you must meet the requirements of
Sec.  63.11965(c) and you must demonstrate initial and continuous
compliance as specified in Sec.  63.11970 and this section.

Sec.  63.11980  What are the test methods and calculation procedures
for process wastewater?

    (a) Performance test methods and procedures. You must determine the
concentration of vinyl chloride and total non-vinyl chloride organic
HAP using the test methods and procedures specified in paragraphs
(a)(1) through (4) of this section. Upon request, the owner or operator
shall make available to the Administrator such records as may be
necessary to determine the conditions of performance tests.
    (1) You must conduct performance tests during worst-case operating
conditions for the PVCPU when the process wastewater treatment process
is operating as close as possible to maximum operating conditions. If
the wastewater treatment process will be operating at several different
sets of operating conditions, you must supplement the testing with
additional testing, modeling or engineering assessments to demonstrate
compliance with the emission limits.
    (2) For measuring total non-vinyl chloride organic HAP, you must
conduct sampling and analysis using the methods specified in paragraphs
(a)(2)(i) through (iv) of this section.
    (i) SW-846-8260B (incorporated by reference, see Sec.  63.14) for
analysis of volatile organic compounds listed in Table 10 of this
subpart.
    (ii) SW-846-8270D (incorporated by reference, see Sec.  63.14) for
analysis of semivolatile organic compounds.
    (iii) SW-846-8315A (incorporated by reference, see Sec.  63.14) for
analysis of aldehyde compounds.
    (iv) SW-846-8015C (incorporated by reference, see Sec.  63.14) for
analysis of alcohol compounds.
    (3) For measuring vinyl chloride, you must use Method 107 at 40 CFR
part 61, appendix B.
    (4) When using the methods in paragraphs (a)(2) and (3) of this
section, you must meet the requirements in paragraphs (a)(4)(i) through
(iii) of this section.
    (i) Sample collection may consist of grab or composite samples.
    (ii) Samples must be taken before the process wastewater stream is
exposed to the atmosphere.
    (iii) You must ensure that sample collection, preservation,
transport, and analysis minimizes loss of HAP and maintains sample
integrity.
    (b) Method for calculating total non-vinyl chloride organic HAP
concentration. For each process wastewater stream analyzed using the
methods specified in paragraph (a) of this section, calculate the sum
of the measured concentrations of each HAP analyzed as required in
Sec.  63.11965(f)(1) by using Equation 1 to this section.
[GRAPHIC] [TIFF OMITTED] TR17AP12.019

Where:
CTNVCH = Concentration of total non-vinyl chloride
organic HAP, in parts per million by weight (ppmw).
Ci = Concentration of individual HAP present in the
sample analyzed pursuant to Sec.  63.11965(f)(1) excluding vinyl
chloride, in ppmw, where a value of zero should be used for any HAP
concentration that is below the detection limit.

Notifications, Reports and Records

Sec.  63.11985  What notifications and reports must I submit and when?

    In addition to the notifications and reports required in subpart A
of this part, as specified in Table 4 to this subpart, you must submit
the additional information and reports specified in paragraphs (a)
through (c) of this section, as applicable.
    (a) Notification of compliance status. When submitting the
notification of compliance status required in Sec.  63.9(h), you must
also include the information specified in paragraphs (a)(1) through (9)
of this section, as applicable.
    (1) You must include an identification of the storage vessels
subject to this subpart, including the capacity and liquid stored for
each vessel. You must submit the information specified in paragraph
(a)(2) of this section for each pressure vessel.
    (2) You must include the information specified in Sec.  63.1039(a)
for equipment leaks.
    (3) You must include an identification of the heat exchange systems
that are subject to the requirements of this subpart.
    (4) You must include the operating limit for each monitoring
parameter identified for each control device used to meet the emission
limits in Table 1 or 2 to this subpart, as determined pursuant to Sec.
63.11935(d). This report must include the information in Sec.
63.11935(d)(2), as applicable.
    (5) You must include the records specified in paragraphs (a)(5)(i)
through (iii) of this section, as applicable, for process vents.
    (i) You must include the performance test records specified in
Sec.  63.11990(f)(1), as applicable. These reports must include one
complete test report for each test method used for each process vent. A
complete test report must include a brief process description, sampling
site description, description of sampling and analysis procedures and
any modifications to standard procedures, quality assurance procedures,
record of operating conditions during the test, record of preparation
of standards, record of calibrations, raw data sheets for field
sampling, raw data sheets for field and laboratory analyses,
documentation of calculations and any other information required by the
test method. For additional tests performed for the same kind of
emission point using the same method, the results and any other
information required in applicable sections of this subpart must be
submitted, but a complete test report is not required.
    (ii) You must include the information specified in paragraphs
(a)(5)(ii)(A) through (C) of this section for batch process vent
operations.
    (A) Descriptions of worst-case operating and/or testing conditions
for control devices including results of emissions profiles.
    (B) Calculations used to demonstrate initial compliance according
to Sec. Sec.  63.11945 and 63.11950, including documentation of the
proper operation of a process condenser(s) as specified in Sec.
63.11950(c)(2)(ii).
    (C) Data and rationale used to support an engineering assessment to
calculate emissions in accordance with Sec.  63.11950(i).
    (iii) If you use a control device other than those listed in Sec.
63.11940 for your process vent, then you must include a description of
the parameters to be monitored to ensure the control device is operated
in conformance with its design and achieves the specified emission
limitation; an explanation of the criteria used to select the
parameter; and a description of the methods and procedures that will be
used to demonstrate that the parameter indicates proper operation of
the control device, the schedule for this demonstration, and a
statement that you will establish an operating limit for the

monitored parameter as specified in paragraph (a)(4) of this section.
    (6) [Reserved]
    (7) You must include the records specified in paragraphs (a)(7)(i)
and (ii) of this section, as applicable, for resin strippers.
    (i) You must include an identification of each resin stripper and
resin type subject to the requirements of this subpart.
    (ii) You must include results of the initial testing used to
determine initial compliance with the stripped resin limits in Table 1
or 2 to this subpart.
    (8) You must include the records specified in paragraphs (a)(8)(i)
and (ii) of this section, as applicable, for process wastewater.
    (i) You must include an identification of each process wastewater
stream subject to the requirements of this subpart, and the results of
your determination for each stream as to whether it must be treated to
meet the limits of Table 1 or 2 to this subpart. You must also include
a description of the treatment process to be used for each process
wastewater stream that requires treatment.
    (ii) You must include results of the initial sampling used to
determine initial compliance with the vinyl chloride and total non-
vinyl chloride organic HAP limits in Table 1 or 2 to this subpart.
    (9) You must include a certification of compliance, signed by a
responsible official, as applicable that states the following:
    (i) ``This facility complies with the requirements in this subpart
for storage vessels.''
    (ii) ``This facility complies with the requirements in this subpart
for equipment leaks.''
    (iii) ``This facility complies with the requirements in this
subpart for heat exchange systems.''
    (iv) ``This facility complies with the requirements in this subpart
for HAP emissions from process vents.''
    (v) ``This facility complies with the requirements in this subpart
for other emission sources.''
    (vi) ``This facility complies with the requirements in this subpart
for the stripped resin.''
    (vii) ``This facility complies with the requirements in this
subpart for wastewater.''
    (b) Compliance reports. When submitting the excess emissions and
continuous monitoring system performance report and summary report
required in Sec.  63.10(e)(3), you must also include the information
specified in paragraphs (b)(1) through (12) of this section, as
applicable. This report is referred to in this subpart as your
compliance report.
    (1) You must include a copy of the inspection record specified in
Sec.  63.11990(b)(2) for each storage vessel when a defect, failure, or
leak is detected. You must also include a copy of the applicable
information specified in Sec.  63.1039(b)(5) through (8) of subpart UU
of this part for each pressure vessel.
    (2) You must include the information specified in Sec.  63.1039(b)
for equipment leaks, except for releases from pressure relief devices.
For any releases from pressure relief devices, you must submit the
report specified in paragraph (c)(7) of this section instead of the
information specified in Sec.  63.1039(b)(4) of subpart UU of this
part.
    (3) You must include the information specified in paragraphs
(b)(3)(i) through (vi) of this section for heat exchange systems.
    (i) The number of heat exchange systems in HAP service.
    (ii) The number of heat exchange systems in HAP service found to be
leaking.
    (iii) A summary of the monitoring data that indicate a leak,
including the number of leaks determined to be equal to or greater than
the leak definition.
    (iv) If applicable, the date a leak was identified, the date the
source of the leak was identified and the date of repair.
    (v) If applicable, a summary of each delayed repair, including the
original date and reason for the delay and the date of repair, if
repaired during the reporting period.
    (vi) If applicable, an estimate of total VOC or vinyl chloride
emissions for each delayed repair over the reporting period.
    (4) You must include the records specified in paragraphs (b)(4)(i)
through (iii) of this section, as applicable, for process vents, resin
strippers, and wastewater.
    (i) Deviations using CEMS or CPMS. For each deviation from an
emission limit or operating limit where a CEMS or CPMS is being used to
comply with the process vent emission limits in Table 1 or 2 to this
subpart, you must include the information in paragraphs (b)(4)(i)(A)
through (E) of this section.
    (A) For CEMS, the 3-hour block average value calculated for any
period when the value is higher than an emission limit in Table 1 or 2
to this subpart or when the value does not meet the data availability
requirements defined in Sec.  63.11890(c).
    (B) For CPMS, the average value calculated for any day (based on
the data averaging periods for compliance specified in Table 5 to this
subpart) that does not meet your operating limit established according
to Sec.  63.11935(d) or that does not meet the data availability
requirements specified in Sec.  63.11890(c).
    (C) The cause for the calculated emission level or operating
parameter level to not meet the established emission limit or operating
limit.
    (D) For deviations caused by lack of monitoring data, the duration
of periods when monitoring data were not collected.
    (E) Operating logs of batch process operations for each day during
which the deviation occurred, including a description of the operating
scenario(s) during the deviation.
    (ii) New operating scenario. Include each new operating scenario
that 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 provide verification that the operating
conditions for any associated control or treatment device have not been
exceeded and constitute proper operation for the new operating
scenario. You must provide any required calculations and engineering
analyses that have been performed for the new operating scenario. For
the purposes of this paragraph (b)(4)(ii), a revised operating scenario
for an existing process is considered to be a new operating scenario
when one or more of the data elements listed in Sec.  63.11990(e)(4)
have changed.
    (iii) Process changes. You must document process changes, or
changes made to any of the information submitted in the notification of
compliance status report or a previous compliance report, that is not
within the scope of an existing operating scenario, in the compliance
report. The notification must include all of the information in
paragraphs (b)(4)(iii)(A) through (C) of this section.
    (A) A description of the process change.
    (B) Revisions to any of the information reported in the original
notification of compliance status report as provided in paragraph (a)
of this section.
    (C) Information required by the notification of compliance status
report, as provided in paragraph (a) of this section, for changes
involving the addition of processes, components, or equipment at the
affected source.
    (5) You must submit the applicable information specified in
paragraphs (b)(5)(i) through (iii) of this section for process vents.

    (i) For catalytic thermal oxidizers for which you have selected the
alternative monitoring specified in Sec.  63.11940(b)(3), results of
the annual catalyst sampling and inspections required by Sec.
63.11940(b)(3)(i) and (ii) including any subsequent corrective actions
taken.
    (ii) For regenerative adsorbers, results of the adsorber bed outlet
volatile organic compounds concentration measurements specified in
Sec.  63.11940(d)(7).
    (iii) For non-regenerative adsorbers, results of the adsorber bed
outlet volatile organic compounds concentration measurements specified
in Sec.  63.11940(e)(2).
    (6) You must include the records specified in Sec.  63.11990(j) for
other emission sources.
    (7) For resin stripper operations, you must include results of
daily vinyl chloride and monthly total non-vinyl chloride organic HAP
concentration results for each resin type produced within the PVCPU
that did not meet the stripped resin emission limits in Table 1 or 2 to
this subpart, as applicable.
    (8) You must include the information specified in paragraphs
(b)(8)(i) and (ii) of this section for your wastewater streams.
    (i) Results of daily vinyl chloride and monthly total non-vinyl
chloride organic HAP concentration results for each process wastewater
stream discharged from the affected source that did not meet the
process wastewater emission limits in Tables 1 or 2 to this subpart.
    (ii) If you must comply with Sec.  63.11965, then you must include
any other applicable information that is required by the reporting
requirements specified in Sec.  63.146.
    (9) For closed vent systems subject to the requirements of Sec.
63.11930, you must include the information specified in paragraphs
(b)(9)(i) through (iv) of this section, as applicable.
    (i) As applicable, records as specified in Sec.  63.11930(g)(1)(i)
for all times when flow was detected in the bypass line, the vent
stream was diverted from the control device, or the flow indicator was
not operating.
    (ii) As applicable, records as specified in Sec.
63.11930(g)(1)(ii) for all occurrences of all periods when a bypass of
the system was indicated (the seal mechanism is broken, the bypass line
valve position has changed, or the key for a lock-and-key type lock has
been checked out, and records of any car-seal that has been broken).
    (iii) Records of all times when monitoring of the system was not
performed as specified in Sec.  63.11930(d) and (e), or repairs were
not performed as specified in Sec.  63.11930(f), or records were not
kept as specified in Sec.  63.11930(g)(2).
    (iv) Records of each time an alarm on a closed vent system
operating in vacuum service is triggered as specified in Sec.
63.11930(h) including the cause for the alarm and the corrective action
taken.
    (10) Closed vent system in vacuum service, bypass deviation, or
pressure vessel closure device deviation report. If any pressure vessel
closure device or closed vent system that contains a bypass has
directly discharged to the atmosphere, or any closed vent system that
is designed to be in vacuum service and is operating and but not in
vacuum service, as specified in Sec. Sec.  63.11910(c)(4), 63.11930(c)
or 63.11930(h), you must submit to the Administrator the following
information:
    (i) The source, nature and cause of the discharge.
    (ii) The date, time and duration of the discharge.
    (iii) An estimate of the quantity of vinyl chloride and total HAP
emitted during the discharge and the method used for determining this
quantity.
    (iv) The actions taken to prevent this discharge.
    (v) The measures adopted to prevent future such discharges
    (11) Affirmative defense report. If you seek to assert an
affirmative defense, as provided in Sec.  63.11895, then you must
submit a written report as specified in Sec.  63.11895(b) to
demonstrate, with all necessary supporting documentation, that you have
met the requirements set forth in Sec.  63.11895(a).
    (12) Overlap with Title V reports. Information required by this
subpart, which is submitted with a Title V periodic report, does not
need to be included in a subsequent compliance report required by this
subpart or subpart referenced by this subpart. The Title V report must
be referenced in the compliance report required by this subpart.
    (c) Other notifications and reports. You must submit the other
notification and reports, as specified in paragraphs (c)(1) through (9)
of this section, as applicable.
    (1) Notification of inspection. To provide the Administrator the
opportunity to have an observer present, you must notify the
Administrator at least 30 days before an inspection required by Sec.
63.11910(a)(3). If an inspection is unplanned and you could not have
known about the inspection 30 days in advance, then you must notify the
Administrator at least 7 days before the inspection. Notification must
be made by telephone immediately followed by written documentation
demonstrating why the inspection was unplanned. Alternatively, the
notification including the written documentation may be made in writing
and sent so that it is received by the Administrator at least 7 days
before the inspection. If a delegated state or local agency is
notified, you are not required to notify the Administrator. A delegated
state or local agency may waive the requirement for notification of
inspections.
    (2) Batch precompliance report. You must submit a batch
precompliance report at least 6 months prior to the compliance date of
this subpart that includes a description of the test conditions, data,
calculations and other information used to establish operating limits
according to Sec.  63.11935(d) for all batch operations. If you use an
engineering assessment as specified in Sec.  63.11950(i), then you must
also include data or other information supporting a finding that the
emissions estimation equations in Sec.  63.11950(a) through (h) are
inappropriate. If the EPA disapproves the report, then you must still
be in compliance with the emission limitations and work practice
standards of this subpart by your compliance date. To change any of the
information submitted in the report, you must notify the EPA 60 days
before you implement the planned change.
    (3) Other control device reporting provisions. If you are using a
control device other than those listed in this subpart, then you must
submit the information as specified in paragraphs (c)(3)(i) through
(iii) of this section.
    (i) A description of the proposed control device.
    (ii) A description of the parameter(s) to be monitored to ensure
the control device is operated in conformance with its design and
achieves the performance level as specified in this subpart and an
explanation of the criteria used to select the parameter(s).
    (iii) The frequency and content of monitoring, recording, and
reporting if monitoring and recording is not continuous, or if the
compliance report information, as specified in paragraph (b)(4)(i)(A)
of this section, will not contain 3-hour block average values when the
monitored parameter value does not meet the established operating
limit. The rationale for the proposed monitoring, recording and
reporting system must be included.
    (4) Request for approval to use alternative monitoring methods.
Prior to your initial notification of compliance status, you may submit
requests for approval to use alternatives to the

continuous operating parameter monitoring specified in this rule, as
provided for in Sec.  63.11940(h), following the same procedure as
specified in Sec.  63.8. The information specified in paragraphs
(c)(4)(i) and (ii) of this section must be included.
    (i) A description of the proposed alternative system.
    (ii) Information justifying your request for an alternative method,
such as the technical or economic infeasibility, or the impracticality,
of the affected source using the required method.
    (5) Request for approval to monitor alternative parameters. Prior
to your initial notification of compliance status, you may submit
requests for approval to monitor a different parameter than those
established in Sec.  63.11935(d), following the same procedure as
specified for alternative monitoring methods in Sec.  63.8. The
information specified in paragraphs (c)(5)(i) through (iii) of this
section must be included in the request.
    (i) A description of the parameter(s) to be monitored to ensure the
control technology or pollution prevention measure is operated in
conformance with its design and achieves the specified emission limit
and an explanation of the criteria used to select the parameter(s).
    (ii) A description of the methods and procedures that will be used
to demonstrate that the parameter indicates proper operation of the
control device, the schedule for this demonstration, and a statement
that you will establish an operating limit for the monitored
parameter(s) as part of the notification of compliance status if
required under this subpart, unless this information has already been
submitted.
    (iii) The frequency and content of monitoring, recording, and
reporting, if monitoring and recording is not continuous. The rationale
for the proposed monitoring, recording, and reporting system must be
included.
    (6) [Reserved]
    (7) Pressure relief device deviation report. If any pressure relief
device in HAP service has discharged to the atmosphere as specified in
Sec.  63.11915(c), then you must submit to the Administrator within 10
days of the discharge the following information:
    (i) The source, nature, and cause of the discharge.
    (ii) The date, time, and duration of the discharge.
    (iii) An estimate of the quantity of vinyl chloride and total HAP
emitted during the discharge and the method used for determining this
quantity.
    (iv) The actions taken to prevent this discharge.
    (v) The measures adopted to prevent future such discharges.
    (8) Commencing and ceasing operation of continuous emissions
monitoring systems. Before starting or stopping the use of CEMS you
must notify the Administrator as specified in Sec.  63.11935(b)(7).
    (9) Data submittal. (i) Within 60 days after the date of completing
each performance test (see Sec.  63.2) required by this subpart, you
must submit the results of performance tests electronically to the
EPA's WebFIRE database by using the Compliance and Emissions Data
Reporting Interface (CEDRI) that is accessed through the EPA's Central
Data Exchange (CDX) (http://www.epa.gov/cdx). Performance test data
must be submitted in the file format generated through use of the EPA's
Electronic Reporting Tool (ERT) (see http://www.epa.gov/ttn/chief/ert/ert_tool.html). Only data collected using test methods compatible with
ERT are subject to this requirement to be submitted electronically to
WebFIRE. Owners or operators who claim that some of the information
being submitted for performance tests is confidential business
information (CBI) must submit a complete ERT file including information
claimed to be CBI on a compact disk or other commonly used electronic
storage media (including, but not limited to, flash drives) to the EPA.
The electronic media must be clearly marked as CBI and mailed to U.S.
EPA/OAPQS/CORE CBI Office, Attention: WebFIRE Administrator, MD C404-
02, 4930 Old Page Rd., Durham, NC 27703. The same ERT file with the CBI
omitted must be submitted to the EPA via CDX as described earlier in
this paragraph. At the discretion of the delegated authority, you must
also submit these reports, including the confidential business
information, to the delegated authority in the format specified by the
delegated authority.
    (ii) Within 60 days after the date of completing each CEMS
performance evaluation test (see Sec.  63.2), you must submit the
relative accuracy test audit data electronically into the EPA's CDX by
using the ERT, as mentioned in paragraph (c)(9)(i) of this section.
Only data collected using test methods compatible with ERT are subject
to this requirement to be submitted electronically to the EPA's CDX.
    (iii) All reports required by this subpart not subject to the
requirements in paragraphs (c)(9)(i) and (ii) of this section must be
sent to the Administrator at the appropriate address listed in Sec.
63.13. The Administrator or the delegated authority may request a
report in any form suitable for the specific case (e.g., by electronic
media such as Excel spreadsheet, on CD or hard copy). The Administrator
retains the right to require submittal of reports subject to paragraphs
(c)(9)(i) and (ii) of this section in paper format.

Sec.  63.11990  What records must I keep?

    You must keep records as specified in paragraphs (a) through (j) of
this section, as applicable.
    (a) Copies of reports. You must keep a copy of each notification
and report that you submit to comply with this subpart, including all
documentation supporting any notification or report. You must also keep
copies of the current versions of the site-specific performance
evaluation test plan, site-specific monitoring plan, and the equipment
leak detection and repair plan.
    (b) Storage vessels. For storage vessels, you must maintain the
records specified in paragraphs (b)(1) through (6) of this section.
    (1) You must keep a record of the dimensions of the storage vessel,
an analysis of the capacity of the storage vessel and an identification
of the liquid stored.
    (2) Inspection records for fixed roofs complying with Sec.
63.11910 including the information specified in paragraphs (b)(2)(i)
and (ii) of this section.
    (i) Record the date of each inspection required by Sec.
63.11910(a)(3).
    (ii) For each defect detected during an inspection required by
Sec.  63.11910(a)(3), record the location of the defect, a description
of the defect, the date of detection and corrective action taken to
repair the defect. In the event that repair of the defect is delayed in
accordance with Sec.  63.11910(a)(4)(ii), also record the reason for
the delay and the date that completion of repair of the defect is
expected.
    (3) [Reserved]
    (4) For pressure vessels, you must keep the records specified in
paragraph (c) of this section for each pressure vessel.
    (5) For internal and external floating roof storage vessels, you
must maintain the records required in Sec.  63.1065 of subpart WW of
this part.
    (6) For fixed roof storage vessels that route emissions through a
closed vent system to a control device, during periods of planned
routine maintenance of a control device, record the day and time at
which planned routine maintenance periods begin and end, and the type
of maintenance performed on the control device. If you need more than
240 hr/yr, keep a record that explains why additional time up to 360

hr/yr was needed and describes how you minimized the amount of
additional time needed.
    (c) Equipment leaks. For equipment leaks, you must maintain the
records specified in Sec.  63.1038 of subpart UU of this part for
equipment leaks and a record of the information specified in Sec.
63.11930(g)(4) for monitoring instrument calibrations conducted
according to Sec.  63.11930(e)(2).
    (d) Heat exchange systems. For a heat exchange system subject to
this subpart, you must keep the records specified in paragraphs (d)(1)
through (6) of this section.
    (1) Identification of all heat exchangers at the facility and the
measured or estimated average annual HAP concentration of process fluid
or intervening cooling fluid processed in each heat exchanger.
    (2) Identification of all heat exchange systems that are in HAP
service. For each heat exchange system that is subject to this subpart,
you must include identification of all heat exchangers within each heat
exchange system, identification of the individual heat exchangers in
HAP service within each heat exchange system, and for closed-loop
recirculation systems, the cooling tower included in each heat exchange
system.
    (3) Identification of all heat exchange systems that are exempt
from the monitoring requirements according to the provisions in Sec.
63.11920(b) and the provision under which the heat exchange system is
exempt.
    (4) Results of the following monitoring data for each monitoring
event:
    (i) Date/time of event.
    (ii) Heat exchange exit line flow or cooling tower return line flow
at the sampling location, gallons/minute.
    (iii) Monitoring method employed.
    (iv) The measured cooling water concentration for each of target
analyte (parts per billion by weight).
    (v) Calibration and recovery information identified in the test
method used.
    (5) The date when a leak was identified and the date when the heat
exchanger was repaired or taken out of service.
    (6) If a repair is delayed, the reason for the delay, the schedule
for completing the repair, and the estimate of potential emissions for
the delay of repair.
    (e) Process vent monitoring. You must include the records specified
in paragraphs (e)(1) through (4) of this section, as applicable, for
process vent monitoring.
    (1) Continuous records. Where this subpart requires a continuous
record using CEMS or CPMS, you must maintain, at a minimum, the records
specified in Sec.  63.10(b)(2)(vii)(A).
    (2) Excluded data. In any average computed to determine compliance,
you must exclude monitoring data recorded during periods specified in
paragraphs (e)(2)(i) through (iii) of this section.
    (i) Periods of non-operation of the process unit (or portion
thereof), resulting in cessation of the emissions to which the
monitoring applies.
    (ii) Periods of no flow to a control device.
    (iii) Monitoring system malfunctions, repairs associated with
monitoring system malfunctions or required monitoring system quality
assurance or control activities, as specified in Sec.  63.11890(c)(2).
    (3) Records of calculated emission and operating parameter values.
You must retain for 5 years, a record of CEMS and CPMS data as
specified in paragraphs (e)(3)(i) and (ii) of this section, unless an
alternative recordkeeping system has been requested and approved.
    (i) Except as specified in paragraph (e)(3)(ii) of this section,
retain for 5 years, the records of the average values for each
continuously monitored operating parameter and pollutant specified in
Sec. Sec.  63.11925(e)(3)(ii) and 63.11925(e)(4)(ii)(B) for CEMS and
CPMS.
    (ii) In lieu of calculating and recording the average value
specified in paragraphs (e)(3)(i) of this section, if all 1-hour
averages specified in Sec.  63.11935(e) demonstrate compliance with
your parameter operating limit or the applicable pollutant emission
limit in Table 1 or 2 to this subpart for the block average period, you
may record a statement that all recorded 1-hour averages met the
operating limit or emission limit, as applicable, and retain for 5
years this statement and all recorded CPMS or CEMS data for the block
average period.
    (4) Information to be included in records. You must keep records of
each operating scenario as specified in paragraphs (e)(4)(i) through
(viii) of this section, as applicable.
    (i) You must keep a schedule or log of operating scenarios, updated
each time a different operating scenario is put into effect.
    (ii) A description of the process and the type of process
components used.
    (iii) An identification of related process vents including their
associated emissions episodes.
    (iv) The applicable control requirements of this subpart for
process vents.
    (v) The control device, including a description of operating and
testing conditions.
    (vi) Combined emissions that are routed to the same control device.
    (vii) The applicable monitoring requirements of this subpart and
any operating limit that assures compliance for all emissions routed to
the control device.
    (viii) Calculations and engineering analyses required to
demonstrate compliance.
    (f) Process vents. You must include the records specified in
paragraphs (f)(1) and (2) of this section, as applicable, for process
vents.
    (1) Records of performance tests as required in Sec.
63.10(b)(2)(viii). You must also collect the applicable control device
operating parameters required in Sec.  63.11940 over the full period of
the performance test.
    (2) If you use a control device to comply with this subpart and you
are required to use CPMS, then you must keep up-to-date and readily
accessible records for your process vents as specified in paragraphs
(f)(2)(i) through (iv) of this section, as applicable.
    (i) If you use a flow indicator, then you must keep records of
periods of no flow to the control device, including the start and stop
time and dates of periods of flow and no flow.
    (ii) If you use a catalytic oxidizer for which you have selected
the alternative monitoring specified in Sec.  63.11940(b)(3), then you
must also maintain records of the results of the annual catalyst
sampling and inspections required by Sec.  63.11940(b)(3)(i) and (ii)
including any subsequent corrective actions taken.
    (iii) If you use a regenerative adsorber as specified in Sec.
63.11940(d), then the records specified in paragraphs (f)(2)(iii)(A)
through (H) of this section, as applicable, must be kept.
    (A) Records of total regeneration stream mass flow for each
adsorber-bed regeneration cycle.
    (B) Records of the temperature of the adsorber bed after each
regeneration and within 15 minutes of completing any cooling cycle.
    (C) For non-vacuum and non-steam regeneration systems, records of
the temperature of the adsorber bed during each regeneration except
during any temperature regulating (cooling or warming to bring bed
temperature closer to vent gas temperature) portion of the regeneration
cycle.
    (D) If adsorber regeneration vacuum is monitored pursuant to Sec.
63.11940(d)(4), then you must keep records of the

vacuum profile over time and the amount of time the vacuum level is
below the minimum vacuum target for each adsorber-bed regeneration
cycle.
    (E) Records of the regeneration frequency and duration.
    (F) Daily records of the verification inspections, including the
visual observations and/or any activation of an automated alarm or
shutdown system with a written entry into a log book or other permanent
form of record.
    (G) Records of the maximum volatile organic compound or HAP outlet
concentration observed over the last 5 minutes of the adsorption cycle
for each adsorber bed. Records must be weekly or for every regeneration
cycle if the regeneration cycle is greater than 1 week.
    (H) Records of the date and time the adsorbent had last been
replaced.
    (iv) If you use a non-regenerative adsorber as specified in Sec.
63.11940(e), then the records specified in paragraphs (f)(2)(iv)(A)
through (C) of this section, as applicable, must be kept.
    (A) A record of the average life of the bed, as determined by Sec.
63.11940(e)(1), including the date the average life was determined.
    (B) Daily, weekly, or monthly records of the maximum volatile
organic compound or HAP outlet concentration, as specified by Sec.
63.11940(e)(2).
    (C) Records of bed replacement including the date and time the
adsorbent had last been replaced, and the date and time in which
breakthrough is detected.
    (g) Closed vent systems. You must keep the records specified in
paragraphs (g)(1) through (6) of this section, and you must record any
additional information as specified in Sec.  63.11930, as applicable.
    (1) Each alarm triggered because flow was detected in a bypass as
specified in Sec.  63.11930(g)(1)(i).
    (2) Inspections of seals or closure mechanisms as specified in
Sec.  63.11930(g)(1)(ii).
    (3) Copies of compliance reports for closed vent system leak
inspections as specified in Sec.  63.11985(b)(9) and Sec.
63.11930(g)(2) and (3).
    (4) Instrument calibration records as specified in Sec.
63.11930(g)(4).
    (5) Unsafe-to-inspect equipment as specified in Sec.
63.11930(g)(5).
    (6) Pressure alarms as specified by Sec.  63.11930(h)(2) and (3).
    (h) Resin strippers. For resin strippers, you must maintain the
records specified in paragraphs (h)(1) and (2) of this section.
    (1) All resin sampling data, including daily measurements of the
concentration of vinyl chloride and monthly measurements of the total
non-vinyl chloride organic HAP compounds in the stripped resin for each
type and grade of resin produced. Each sample must be identified by the
resin type and resin grade, the date and time the sample was taken,
identification of the resin stripper from which the sample was taken,
and the corresponding quantity (pounds) of resin processed by the
stripper for the batch or over the time period represented by the
sample.
    (2) The total quantity (pounds) of each resin grade produced per
day and the total quantity of resin processed by each resin stripper,
identified by resin type and resin grade, per day.
    (i) Process wastewater. For treatment processes, you must maintain
the records specified in paragraphs (i)(1) through (5) of this section.
    (1) A description of the process wastewater generation activities
and treatment process.
    (2) Records of the treatment determinations specified in Sec.
63.11965(b) for each wastewater stream and the type of treatment
applied if required in Sec.  63.11965(c).
    (3) Records of the initial performance test specified in Sec.
63.11970(a) and (b).
    (4) All testing data, including monthly measurements of the
concentrations of vinyl chloride and the concentration of total non-
vinyl chloride organic HAP in each process wastewater stream required
to be measured, as specified in Sec.  63.11975.
    (5) You must keep any other applicable records that are required by
the recordkeeping requirements specified in Sec.  63.147 of subpart G
of this part.
    (j) Other emission sources. You must keep the records specified in
paragraphs (j)(1) and (2) of this section.
    (1) All engineering calculations, testing, sampling, and monitoring
results and data specified in Sec.  63.11955.
    (2) Each occurrence that you do not comply with the requirements in
Sec.  63.11955.

Sec.  63.11995  In what form and how long must I keep my records?

    (a) You must keep records for 5 years in a form suitable and
readily available for expeditious review, as specified in Sec.
63.10(b)(1).
    (b) You must keep each record on site for at least 2 years, as
specified in Sec.  63.10(b)(1). You can keep the records off site for
the remaining 3 years. Records may be maintained in hard copy or
computer-readable format including, but not limited to, on paper,
microfilm, hard disk drive, floppy disk, compact disk, magnetic tape or
microfiche.

Sec.  63.12000  Who implements and enforces this subpart?

    (a) This subpart can be implemented and enforced by the
Administrator, as defined in Sec.  63.2, or a delegated authority such
as your state, local or tribal agency. If the Administrator has
delegated authority to your state, local or tribal agency, then that
agency (as well as the Administrator) has the authority to implement
and enforce this subpart. You should contact your EPA Regional Office
to find out if this subpart is delegated to your state, local or tribal
agency.
    (b) In delegating implementation and enforcement authority of this
subpart to a state, local or tribal agency, the authorities listed in
paragraphs (b)(1) through (4) of this section are retained by the
Administrator and are not transferred to the state, local or tribal
agency, however, the EPA retains oversight of this subpart and can take
enforcement actions, as appropriate.
    (1) Approval of alternatives to the emission limits, operating
limits, and work practice standards specified in this subpart.
    (2) Approval of a major change to test methods, as defined in Sec.
63.90, approval of any proposed analysis methods, and approval of any
proposed test methods.
    (3) Approval of a major change to monitoring, as defined in Sec.
63.90.