3. water scrubber............  a. for periods of normal operation,
                                maintain the daily average scrubber
                                pressure drop and scrubber liquid flow
                                rate within the range of values
                                established during the compliance
                                demonstration;

                               b. after December 29, 2020, for existing
                                sources (and new or reconstructed
                                sources for which construction or,
                                reconstruction commenced on or before
                                September 9, 2019), and on July 2, 2020,
                                or immediately upon startup, whichever
                                is later for new or reconstructed
                                sources for which construction or
                                reconstruction commenced after September
                                9, 2019, maintain documentation for
                                periods of startup and shutdown to
                                confirm that the scrubber is operating
                                properly prior to emission unit startup
                                and continues to operate properly until
                                emission unit shutdown is complete.
                                Appropriate startup and shutdown
                                operating parameters may be based on
                                equipment design, manufacturer's
                                recommendations, or other site-specific
                                operating values established for normal
                                operating periods.
4. caustic scrubber..........  a. for periods of normal operation,
                                maintain the daily average scrubber
                                pressure drop, scrubber liquid flow
                                rate, and scrubber liquid pH,
                                conductivity, or alkalinity within the
                                range of values established during the
                                compliance demonstration;
                               b. after December 29, 2020, for existing
                                sources (and new or reconstructed
                                sources for which construction or
                                reconstruction commenced on or before
                                September 9, 2019), and on July 2, 2020,
                                or immediately upon startup, whichever
                                is later for new or reconstructed
                                sources for which construction or
                                reconstruction commenced after September
                                9, 2019, maintain documentation for
                                periods of startup and shutdown to
                                confirm that the scrubber is operating
                                properly prior to emission unit startup
                                and continues to operate properly until
                                emission unit shutdown is complete.
                                Appropriate startup and shutdown
                                operating parameters may be based on
                                equipment design, manufacturer's
                                recommendations, or other site-specific
                                operating values established for normal
                                operating periods.
5. flare.....................  maintain the presence of a pilot flame.
6. biofilter.................  maintain the daily average biofilter
                                inlet gas temperature, biofilter
                                effluent pH or conductivity, and
                                pressure drop within the operating
                                values established during the compliance
                                demonstration.
7. carbon absorber...........  maintain the regeneration frequency,
                                total regeneration adsorber stream mass
                                or volumetric flow during carbon bed
                                regeneration, and temperature of the
                                carbon bed after regeneration (and
                                within 15 minutes of completing any
                                cooling cycle(s)) for each regeneration
                                cycle within the values established
                                during the compliance demonstration.
8. oil absorber..............  maintain the daily average absorption
                                liquid flow, absorption liquid
                                temperature, and steam flow within the
                                values established during the compliance
                                demonstration.
9. any of the control          if using a CEMS, maintain the daily
 techniques specified in this   average control efficiency of each
 table.                         control device no lower than the value
                                established during the compliance
                                demonstration.
10. any of the control         a. if you wish to establish alternative
 techniques specified in this   operating parameters, submit the
 table.                         application for approval of the
                                alternative operating parameters no
                                later than the notification of the
                                performance test or CEMS performance
                                evaluation or no later than 60 days
                                prior to any other initial compliance
                                demonstration;
                               b. the application must include:
                                Information justifying the request for
                                alternative operating parameters (such
                                as the infeasibility or impracticality
                                of using the operating parameters in
                                this final rule); a description of the
                                proposed alternative control device
                                operating parameters; the monitoring
                                approach; the frequency of measuring and
                                recording the alternative parameters;
                                how the operating limits are to be
                                calculated; and information documenting
                                that the alternative operating
                                parameters would provide equivalent or
                                better assurance of compliance with the
                                standard;
                               c. install, operate, and maintain the
                                alternative parameter monitoring systems
                                in accordance with the application
                                approved by the Administrator;
                               d. establish operating limits during the
                                initial compliance demonstration based
                                on the alternative operating parameters
                                included in the approved application;
                                and
                               e. maintain the daily average alternative
                                operating parameter values within the
                                values established during the compliance
                                demonstration.
11. alternative control        a. submit for approval no later than the
 technique.                     notification of the performance test or
                                CEMS performance evaluation or no later
                                than 60 days prior to any other initial
                                compliance demonstration a proposed site-
                                specific plan that includes: A
                                description of the alternative control
                                device; test results verifying the
                                performance of the control device; the
                                appropriate operating parameters that
                                will be monitored; and the frequency of
                                measuring and recording to establish
                                continuous compliance with the operating
                                limits;
                               b. install, operate, and maintain the
                                parameter monitoring system for the
                                alternative control device in accordance
                                with the plan approved by the
                                Administrator;
                               c. establish operating limits during the
                                initial compliance demonstration based
                                on the operating parameters for the
                                alternative control device included in
                                the approved plan; and
                               d. maintain the daily average operating
                                parameter values for the alternative
                                control technique within the values
                                established during the compliance
                                demonstration.
------------------------------------------------------------------------

0
13. Table 3 to Subpart UUUU is revised to read as follows:

Table 3 to Subpart UUUU of Part 63--Initial Compliance With Emission
Limits and Work Practice Standards

    As required in Sec. Sec.  63.5530(a) and 63.5535(g) and (h), you
must demonstrate initial compliance with the appropriate emission
limits and work practice standards according to the requirements in the
following table:

----------------------------------------------------------------------------------------------------------------
                                           for the following emission limit      you have demonstrated initial
      For . . .            at . . .         or work practice standard . . .           compliance if . . .
----------------------------------------------------------------------------------------------------------------
1. the sum of all     a. each existing    i. reduce total uncontrolled        (1) the average uncontrolled total
 viscose process       cellulose food      sulfide emissions (reported as      sulfide emissions, determined
 vents                 casing operation    carbon disulfide) by at least 25    during the month-long compliance
                                           percent based on a 6-month          demonstration or using
                                           rolling average;                    engineering assessments, are
                                          ii. for each vent stream that you    reduced by at least 25 percent;
                                           control using a control device,    (2) you have a record of the range
                                           route the vent stream through a     of operating parameter values
                                           closed-vent system to the control   over the month-long compliance
                                           device; and                         demonstration during which the
                                          iii. comply with the work practice   average uncontrolled total
                                           standard for closed-vent systems    sulfide emissions were reduced by
                                                                               at least 25 percent;
                                                                              (3) you prepare a material balance
                                                                               that includes the pertinent data
                                                                               used to determine the percent
                                                                               reduction of total sulfide
                                                                               emissions; and
                                                                              (4) you comply with the initial
                                                                               compliance requirements for
                                                                               closed-vent systems.
                      b. each new         i. reduce total uncontrolled        (1) the average uncontrolled total
                       cellulose food      sulfide emissions (reported as      sulfide emissions, determined
                       casing operation    carbon disulfide) by at least 75    during the month-long compliance
                                           percent based on a 6-month          demonstration or using
                                           rolling average;                    engineering assessments, are
                                          ii. for each vent stream that you    reduced by at least 75 percent;
                                           control using a control device,    (2) you have a record of the range
                                           route the vent stream through a     of operating parameter values
                                           closed-vent system to the control   over the month-long compliance
                                           device; and                         demonstration during which the
                                          iii. comply with the work practice   average uncontrolled total
                                           standard for closed-vent systems.   sulfide emissions were reduced by
                                                                               at least 75 percent;
                                                                              (3) you prepare a material balance
                                                                               that includes the pertinent data
                                                                               used to determine the percent
                                                                               reduction of total sulfide
                                                                               emissions; and
                                                                              (4) you comply with the initial
                                                                               compliance requirements for
                                                                               closed-vent systems.
                      c. each existing    i. reduce total uncontrolled        (1) the average uncontrolled total
                       rayon operation     sulfide emissions (reported as      sulfide emissions, determined
                                           carbon disulfide) by at least 35    during the month-long compliance
                                           percent within 3 years after the    demonstration or using
                                           effective date based on a 6-month   engineering assessments, are
                                           rolling average; for each vent      reduced by at least 35 percent
                                           stream that you control using a     within 3 years after the
                                           control device, route the vent      effective date;
                                           stream through a closed-vent       (2) you have a record of the
                                           system to the control device; and   average operating parameter
                                           comply with the work practice       values over the month-long
                                           standard for closed-vent systems;   compliance demonstration during
                                           and                                 which the average uncontrolled
                                                                               total sulfide emissions were
                                                                               reduced by at least 35 percent;
                                                                              (3) you prepare a material balance
                                                                               that includes the pertinent data
                                                                               used to determine the percent
                                                                               reduction of total sulfide
                                                                               emissions; and
                                                                              (4) you comply with the initial
                                                                               compliance requirements for
                                                                               closed-vent systems; and
                      ..................  ii. reduce total uncontrolled       (1) the average uncontrolled total
                                           sulfide emissions (reported as      sulfide emissions, determined
                                           carbon disulfide) by at least 40    during the month-long compliance
                                           percent within 8 years after the    demonstration or using
                                           effective date based on a 6-month   engineering assessments, are
                                           rolling average; for each vent      reduced by at least 40 percent
                                           stream that you control using a     within 8 years after the
                                           control device, route the vent      effective date;
                                           stream through a closed-vent       (2) you have a record of the
                                           system to the control device; and   average operating parameter
                                           comply with the work practice       values over the month-long
                                           standard for closed-vent systems.   compliance demonstration during
                                                                               which the average uncontrolled
                                                                               total sulfide emissions were
                                                                               reduced by at least 40 percent;
                                                                              (3) you prepare a material balance
                                                                               that includes the pertinent data
                                                                               used to determine the percent
                                                                               reduction of the total sulfide
                                                                               emissions; and
                                                                              (4) you comply with the initial
                                                                               compliance requirements for
                                                                               closed-vent systems.

                      d. each new rayon   i. reduce total uncontrolled        (1) the average uncontrolled total
                       operation           sulfide emissions (reported as      sulfide emissions, determined
                                           carbon disulfide) by at least 75    during the month-long compliance
                                           percent; based on a 6-month         demonstration or using
                                           rolling average;                    engineering assessments, are
                                          ii. for each vent stream that you    reduced by at least 75 percent;
                                           control using a control device,    (2) you have a record of the
                                           route the vent stream through a     average operating parameter
                                           closed-vent system to the control   values over the month-long
                                           device; and                         compliance demonstration during
                                          iii. comply with the work practice   which the average uncontrolled
                                           standard for closed-vent systems.   total sulfide emissions were
                                                                               reduced by at least 75 percent;
                                                                              (3) you prepare a material balance
                                                                               that includes the pertinent data
                                                                               used to determine the percent
                                                                               reduction of total sulfide
                                                                               missions; and
                                                                              (4) you comply with the initial
                                                                               compliance requirements for
                                                                               closed-vent systems.
                      e. each existing    i. reduce total uncontrolled        (1) the average uncontrolled total
                       or new cellulosic   sulfide emissions (reported as      sulfide emissions, determined
                       sponge operation    carbon disulfide) by at least 75    during the month-long compliance
                                           percent based on a 6-month          demonstration or using
                                           rolling average;                    engineering assessments, are
                                          ii. for each vent stream that you    reduced by at least 75 percent;
                                           control using a control device,    (2) you have a record of the
                                           route the vent stream through a     average operating parameter
                                           closed-vent system to the control   values over the month-long
                                           device; and                         compliance demonstration during
                                          iii. comply with the work practice   which the average uncontrolled
                                           standard for closed-vent systems.   total sulfide emissions were
                                                                               reduced by at least 75 percent;
                                                                              (3) you prepare a material balance
                                                                               that includes the pertinent data
                                                                               used to determine and the percent
                                                                               reduction of total sulfide
                                                                               emissions; and
                                                                              (4) you comply with the initial
                                                                               compliance requirements for
                                                                               closed-vent systems.
                      f. each existing    i. reduce total uncontrolled        (1) the average uncontrolled total
                       or new cellophane   sulfide emissions (reported as      sulfide emissions, determined
                       operation           carbon disulfide) by at least 75    during the month-long compliance
                                           percent based on a 6-month          demonstration or using
                                           rolling average;                    engineering assessments, are
                                          ii. for each vent stream that you    reduced by at least 75 percent;
                                           control using a control device     (2) you have a record of the
                                           (except for retractable hoods       average operating parameter
                                           over sulfuric acid baths at a       values over the month-long
                                           cellophane operation), route the    compliance demonstration during
                                           vent stream through a closed-vent   which the average uncontrolled
                                           system to the control device; and   total sulfide emissions were
                                          iii. comply with the work practice   reduced by at least 75 percent;
                                           standard for closed-vent systems.  (3) you prepare a material balance
                                                                               that includes the pertinent data
                                                                               used to determine the percent
                                                                               reduction of total sulfide
                                                                               emissions; and
                                                                              (4) you comply with the initial
                                                                               compliance requirements for
                                                                               closed-vent systems.
2. the sum of all     a. each existing    i. reduce uncontrolled toluene      (1) the average uncontrolled
 solvent coating       or new cellophane   emissions by at least 95 percent    toluene emissions, determined
 process vents         operation           based on a 6-month rolling          during the month-long compliance
                                           average;                            demonstration or using
                                          ii. for each vent stream that you    engineering assessments, are
                                           control using a control device,     reduced by at least 95 percent;
                                           route the vent stream through a    (2) you have a record of the
                                           closed-vent system to the control   average operating parameter
                                           device; and                         values over the month-long
                                          iii. comply with the work practice   compliance demonstration during
                                           standard for closed-vent systems.   which the average uncontrolled
                                                                               toluene emissions were reduced by
                                                                               at least 95 percent;
                                                                              (3) you prepare a material balance
                                                                               that includes the pertinent data
                                                                               used to determine the percent
                                                                               reduction of toluene emissions;
                                                                               and
                                                                              (4) you comply with the initial
                                                                               compliance requirements for
                                                                               closed-vent systems.

3. the sum of all     a. each existing    i. reduce total uncontrolled        (1) average uncontrolled total
 cellulose ether       or new cellulose    organic HAP emissions by at least   organic HAP emissions, measured
 process vents         ether operation     99 percent;                         during the performance test or
                       using a            ii. for each vent stream that you    determined using engineering
                       performance test    control using a control device,     estimates are reduced by at least
                       to demonstrate      route the vent stream through a     99 percent;
                       initial             closed-vent system to the control  (2) you have a record of the
                       compliance; or      device; and                         average operating parameter
                                          iii. comply with the work practice   values over the performance test
                                           standard for closed-vent systems.   during which the average
                                                                               uncontrolled total organic HAP
                                                                               emissions were reduced by at
                                                                               least 99 percent; and
                                                                              (3) you comply with the initial
                                                                               compliance requirements for
                                                                               closed-vent systems.
                      b. each existing    i. reduce total uncontrolled        (1) average uncontrolled total
                       or new cellulose    organic HAP emissions by at least   organic HAP emissions, determined
                       ether operation     99 percent based on a 6-month       during the month-long compliance
                       using a material    rolling average;                    demonstration or using
                       balance            ii. for each vent stream that you    engineering estimates are reduced
                       compliance          control using a control device,     by at least 99 percent;
                       demonstration to    route the vent stream through a    (2) you have a record of the
                       demonstrate         closed-vent system to the control   average operation parameter
                       initial             device; and                         values over the month-long
                       compliance         iii. comply with the work practice   compliance demonstration during
                                           standard for closed-vent systems.   which the average uncontrolled
                                                                               total organic HAP emissions were
                                                                               reduced by at least 99 percent;
                                                                              (3) you prepare a material balance
                                                                               that includes the pertinent data
                                                                               used to determine the percent
                                                                               reduction of total organic HAP
                                                                               emissions;
                                                                              (4) if you use extended cookout to
                                                                               comply, you measure the HAP
                                                                               charged to the reactor, record
                                                                               the grade of product produced,
                                                                               and then calculate reactor
                                                                               emissions prior to extended
                                                                               cookout by taking a percentage of
                                                                               the total HAP charged.
4. closed-loop        each existing or    operate and maintain the closed-    you have a record certifying that
 systems               new cellulose       loop system for cellulose ether     a closed-loop system is in use
                       ether operation     operations.                         for cellulose ether operations.
5. each carbon        a. each existing    i. reduce uncontrolled carbon       (1) you have a record documenting
 disulfide unloading   or new viscose      disulfide emissions by at least     the 83-percent reduction in
 and storage           process affected    83 percent from unloading and       uncontrolled carbon disulfide
 operation             source              storage operations based on a 6-    emissions; and
                                           month rolling average if you use   (2) if venting to a control device
                                           an alternative control technique    to reduce emissions, you comply
                                           not listed in this table for        with the initial compliance
                                           carbon disulfide unloading and      requirements for closed-vent
                                           storage operations; if using a      systems;
                                           control device to reduce
                                           emissions, route emissions
                                           through a closed-vent system to
                                           the control device; and comply
                                           with the work practice standard
                                           for closed-vent systems;
                                          ii. reduce uncontrolled carbon      (1) you comply with the initial
                                           disulfide by at least 0.14          compliance requirements for
                                           percent from viscose process        viscose process vents at existing
                                           vents based on a 6-month rolling    or new cellulose food casing,
                                           average; for each vent stream       rayon, cellulosic sponge, or
                                           that you control using a control    cellophane operations, as
                                           device, route the vent stream       applicable;
                                           through a closed-vent system to    (2) the 0.14-percent reduction
                                           the control device; and comply      must be in addition to the
                                           with the work practice standard     reduction already required for
                                           for closed-vent systems;            viscose process vents at existing
                                                                               or new cellulose food casing,
                                                                               rayon, cellulosic sponge, or
                                                                               cellophane operations, as
                                                                               applicable; and
                                                                              (3) you comply with the initial
                                                                               compliance requirements for
                                                                               closed-vent systems;
                                          iii. install a nitrogen unloading   you have a record certifying that
                                           and storage system; or              a nitrogen unloading and storage
                                                                               system is in use; or

                                          iv. install a nitrogen unloading    (1) you have a record certifying
                                           system; reduce uncontrolled         that a nitrogen unloading system
                                           carbon disulfide by at least        is in use;
                                           0.045 percent from viscose         (2) you comply with the initial
                                           process vents based on a 6-month    compliance requirements for
                                           rolling average; for each vent      viscose process vents at existing
                                           stream that you control using a     or new cellulose food casing,
                                           control device, route the vent      rayon, cellulosic sponge, or
                                           stream through a closed-vent        cellophane operations, as
                                           system to the control device; and   applicable;
                                           comply with the work practice      (3) the 0.045-percent reduction
                                           standard for closed-vent systems.   must be in addition to the
                                                                               reduction already required for
                                                                               viscose process vents at
                                                                               cellulose food casing, rayon,
                                                                               cellulosic sponge, or cellophane
                                                                               operations, as applicable; and
                                                                              (4) you comply with the initial
                                                                               compliance requirements for
                                                                               closed-vent systems.
6. each toluene       a. each existing    i. reduce uncontrolled toluene      (1) the average uncontrolled
 storage vessel        or new cellophane   emissions by at least 95 percent    toluene emissions, determined
                       operation           based on a 6-month rolling          during the month-long compliance
                                           average;                            demonstration or using
                                          ii. if using a control device to     engineering assessments, are
                                           reduce emissions, route the         reduced by at least 95 percent;
                                           emissions through a closed-vent    (2) you have a record of the
                                           system to the control device; and   average operating parameter
                                          iii. comply with the work practice   values over the month-long
                                           standard for closed-vent systems.   compliance demonstration during
                                                                               which the average uncontrolled
                                                                               toluene emissions were reduced by
                                                                               at least 95 percent;
                                                                              (3) you prepare a material balance
                                                                               that includes the pertinent data
                                                                               used to determine the percent
                                                                               reduction of toluene emissions;
                                                                               and
                                                                              (4) if venting to a control device
                                                                               to reduce emissions, you comply
                                                                               with the initial compliance
                                                                               requirements for closed-vent
                                                                               systems.
7. equipment leaks    a. each existing    i. comply with the applicable       you comply with the applicable
                       or new cellulose    equipment leak standards of Sec.    requirements described in the
                       ether operation     Sec.   63.162 through 63.179; or    Notification of Compliance Status
                                                                               Report provisions in Sec.
                                                                               63.182(a)(2) and (c)(1) through
                                                                               (3), except that references to
                                                                               the term ``process unit'' mean
                                                                               ``cellulose ether process unit''
                                                                               for the purposes of this subpart;
                                                                               or
                                          ii. comply with the applicable      you comply with the applicable
                                           equipment leak standards of Sec.    requirements described in the
                                           Sec.   63.1021 through 63.1027.     Initial Compliance Status Report
                                                                               provisions of Sec.   63.1039(a),
                                                                               except that references to the
                                                                               term ``process unit'' mean
                                                                               ``cellulose ether process unit''
                                                                               for the purposes of this subpart.
8. all sources of     each existing or    comply with the applicable          you comply with the applicability
 wastewater            new cellulose       wastewater provisions of Sec.       and Group 1/Group 2 determination
 emissions             ether operation     63.105 and Sec.  Sec.   63.132      provisions of Sec.   63.144 and
                                           through 63.140.                     the initial compliance provisions
                                                                               of Sec.  Sec.   63.105 and
                                                                               63.145.
9. liquid streams in  each existing or    comply with the applicable          you install emission suppression
 open systems          new cellulose       provisions of Sec.   63.149,        equipment and conduct an initial
                       ether operation     except that references to           inspection according to the
                                           ``chemical manufacturing process    provisions of Sec.  Sec.   63.133
                                           unit'' mean ``cellulose ether       through 63.137.
                                           process unit'' for the purposes
                                           of this subpart.
10. closed-vent       a. each existing    i. conduct annual inspections,      (1) you conduct an initial
 system used to        or new affected     repair leaks, and maintain          inspection of the closed-vent
 route emissions to    source              records as specified in Sec.        system and maintain records
 a control device                          63.148.                             according to Sec.   63.148;
                                                                              (2) you prepare a written plan for
                                                                               inspecting unsafe-to-inspect and
                                                                               difficult-to-inspect equipment
                                                                               according to Sec.   63.148(g)(2)
                                                                               and (h)(2); and
                                                                              (3) you repair any leaks and
                                                                               maintain records according to
                                                                               Sec.   63.148.

11. closed-vent       a. each existing    i. install, calibrate, maintain,    you have a record documenting that
 system containing a   or new affected     and operate a flow indicator as     you installed a flow indicator as
 bypass line that      source              specified in Sec.   63.148(f)(1);   specified in Table 1 to this
 could divert a vent                       or                                  subpart; or
 stream away from a
 control device,
 except for
 equipment needed
 for safety purposes
 (described in Sec.
  63.148(f)(3))
                      ..................  ii. secure the bypass line valve    you have record documenting that
                                           in the closed position with a car-  you have secured the bypass line
                                           seal or lock-and-key type           valve as specified in Table 1 to
                                           configuration and inspect the       this subpart.
                                           seal or closure mechanism at
                                           least once per month as specified
                                           in Sec.   63.148(f)(2)
12. heat exchanger    a. each existing    i. monitor and repair the heat      (1) you determine that the heat
 system that cools     or new affected     exchanger system according to       exchanger system is exempt from
 process equipment     source              Sec.   63.104(a) through (e),       monitoring requirements because
 or materials in the                       except that references to           it meets one of the conditions in
 process unit                              ``chemical manufacturing process    Sec.   63.104(a)(1) through (6),
                                           unit'' mean ``cellulose food        and you document this finding in
                                           casing, rayon, cellulosic sponge,   your Notification of Compliance
                                           cellophane, or cellulose ether      Status Report; or
                                           process unit'' for the purposes    (2) if your heat exchanger system
                                           of this subpart.                    is not exempt, you identify in
                                                                               your Notification of Compliance
                                                                               Status Report the HAP or other
                                                                               representative substance that you
                                                                               will monitor, or you prepare and
                                                                               maintain a site-specific plan
                                                                               containing the information
                                                                               required by Sec.
                                                                               63.104(c)(1)(i) through (iv) that
                                                                               documents the procedures you will
                                                                               use to detect leaks by monitoring
                                                                               surrogate indicators of the leak.
----------------------------------------------------------------------------------------------------------------

0
14. Table 4 to Subpart UUUU is revised to read as follows:

Table 4 to Subpart UUUU of Part 63--Requirements for Performance Tests

    As required in Sec. Sec.  63.5530(b) and 63.5535(a), (b), (g)(1),
and (h)(1), you must conduct performance tests, other initial
compliance demonstrations, and CEMS performance evaluations and
establish operating limits according to the requirements in the
following table:

--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                according to the following requirements
              For . . .                      at . . .              you must . . .            using . . .                          . . .
--------------------------------------------------------------------------------------------------------------------------------------------------------
1. the sum of all process vents.....  a. each existing or     i. select sampling       EPA Method 1 or 1A in    sampling sites must be located at the
                                       new affected source.    port's location and      appendix A-1 to part     inlet and outlet to each control
                                                               the number of traverse   60 of this chapter;      device;
                                                               points;
                                                              ii. determine velocity   EPA Method 2, 2A, 2C,    you may use EPA Method 2A, 2C, 2D, 2F,
                                                               and volumetric flow      2D, 2F, or 2G in         or 2G as an alternative to using EPA
                                                               rate;                    appendices A-1 and A-2   Method 2, as appropriate;
                                                                                to part 60 of this
                                                                                chapter;
                                                              iii. conduct gas         (1) EPA Method 3, 3A,    you may use EPA Method 3A or 3B as an
                                                               analysis; and,           or 3B in appendix A-2    alternative to using EPA Method 3; or,
                                                                                to part 60 of this
                                                                                chapter; or,
                                                              .......................  (2) ASME PTC 19.10-      you may use ASME PTC 19.10-1981--Part 10
                                                                                1981--Part 10            as an alternative to using the manual
                                                                                (incorporated by         procedures (but not instrumental
                                                                                reference--see Sec.      procedures) in EPA Method 3B.
                                                                                63.14); and,
                                                              iv. measure moisture     EPA Method 4 in
                                                               content of the stack     appendix A-3 to part
                                                               gas.                     60 of this chapter.

2. the sum of all viscose process     a. each existing or     i. measure total         (1) EPA Method 15 in     (a) you must conduct testing of
 vents.                                new viscose process     sulfide emissions.       appendix A-5 to part     emissions at the inlet and outlet of
                                       source.                                          60 of this chapter; or   each control device;
                                                                                (b) you must conduct testing of
                                                                                emissions from continuous viscose
                                                                                process vents and combinations of batch
                                                                                and continuous viscose process vents at
                                                                                normal operating conditions, as
                                                                                specified in Sec.   63.5535;
                                                                                (c) you must conduct testing of
                                                                                emissions from batch viscose process
                                                                                vents as specified in Sec.   63.490(c),
                                                                                except that the emission reductions
                                                                                required for process vents under this
                                                                                subpart supersede the emission
                                                                                reductions required for process vents
                                                                                under subpart U of this part; and
                                                                                (d) you must collect CPMS data during
                                                                                the period of the initial compliance
                                                                                demonstration and determine the CPMS
                                                                                operating limit during the period of
                                                                                the initial compliance demonstration.
                                                              .......................  (2) carbon disulfide     (a) you must measure emissions at the
                                                                                and/or hydrogen          inlet and outlet of each control device
                                                                                sulfide CEMS, as         using CEMS;
                                                                                applicable;             (b) you must install, operate, and
                                                                                maintain the CEMS according to the
                                                                                applicable performance specification
                                                                                (PS-7, PS-8, PS-9, or PS-15) of
                                                                                appendix B to part 60 of this chapter;
                                                                                and
                                                                                (c) you must collect CEMS emissions data
                                                                                at the inlet and outlet of each control
                                                                                device during the period of the initial
                                                                                compliance demonstration and determine
                                                                                the CEMS operating limit during the
                                                                                period of the initial compliance
                                                                                demonstration.
3. the sum of all solvent coating     a. each existing or     i. measure toluene       (1) EPA Method 18 in     (a) you must conduct testing of
 process vents.                        new cellophane          emissions.               appendix A-6 to part     emissions at the inlet and outlet of
                                       operation.                                       60 of this chapter, or   each control device;
                                                                                Method 320 in appendix  (b) you may use EPA Method 18 or 320 to
                                                                                A to part 63; or         determine the control efficiency of any
                                                                                control device for organic compounds;
                                                                                for a combustion device, you must use
                                                                                only HAP that are present in the inlet
                                                                                to the control device to characterize
                                                                                the percent reduction across the
                                                                                combustion device;
                                                                                (c) you must conduct testing of
                                                                                emissions from continuous solvent
                                                                                coating process vents and combinations
                                                                                of batch and continuous solvent coating
                                                                                process vents at normal operating
                                                                                conditions, as specified in Sec.
                                                                                63.5535;
                                                                                (d) you must conduct testing of
                                                                                emissions from batch solvent coating
                                                                                process vents as specified in Sec.
                                                                                63.490(c), except that the emission
                                                                                reductions required for process vents
                                                                                under this subpart supersede the
                                                                                emission reductions required for
                                                                                process vents under subpart U of this
                                                                                part; and
                                                                                (e) you must collect CPMS data during
                                                                                the period of the initial compliance
                                                                                demonstration and determine the CPMS
                                                                                operating limit during the initial
                                                                                compliance demonstration.

                                                              .......................  (2) ASTM D6420-99        (a) you must conduct testing of
                                                                                (Reapproved 2010)        emissions at the inlet and outlet of
                                                                                (incorporated by         each control device;
                                                                                reference--see Sec.     (b) you may use ASTM D6420-99
                                                                                63.14); or               (Reapproved 2010) as an alternative to
                                                                                EPA Method 18 only where: The target
                                                                                compound(s) are known and are listed in
                                                                                ASTM D6420 as measurable; this ASTM
                                                                                should not be used for methane and
                                                                                ethane because their atomic mass is
                                                                                less than 35; ASTM D6420 should never
                                                                                be specified as a total VOC method;
                                                                                (c) you must conduct testing of
                                                                                emissions from continuous solvent
                                                                                coating process vents and combinations
                                                                                of batch and continuous solvent coating
                                                                                process vents at normal operating
                                                                                conditions, as specified in Sec.
                                                                                63.5535;
                                                                                (d) you must conduct testing of
                                                                                emissions from batch solvent coating
                                                                                process vents as specified in Sec.
                                                                                63.490(c), except that the emission
                                                                                reductions required for process vents
                                                                                under this subpart supersede the
                                                                                emission reductions required for
                                                                                process vents under subpart U of this
                                                                                part; and
                                                                                (e) you must collect CPMS data during
                                                                                the period of the initial compliance
                                                                                demonstration and determine the CPMS
                                                                                operating limit during the period of
                                                                                the initial compliance demonstration.

                                                              .......................  (3) ASTM D6348-12e1      (a) you must conduct testing of
                                                                                (incorporated by         emissions at the inlet and outlet of
                                                                                reference--see Sec.      each control device;
                                                                                63.14).                 (b) you may use ASTM D6348-12e1 as an
                                                                                alternative to EPA Method 320 only
                                                                                where the following conditions are met:
                                                                                (1) The test plan preparation and
                                                                                implementation in the Annexes to ASTM D
                                                                                6348-03, Sections A1 through A8 are
                                                                                mandatory; and (2) in ASTM D6348-03
                                                                                Annex A5 (Analyte Spiking Technique),
                                                                                the percent recovery (%R) must be
                                                                                determined for each target analyte
                                                                                (Equation A5.5). In order for the test
                                                                                data to be acceptable for a compound,
                                                                                %R must be greater than or equal to 70
                                                                                percent and less than or equal to 130
                                                                                percent. If the %R value does not meet
                                                                                this criterion for a target compound,
                                                                                the test data are not acceptable for
                                                                                that compound and the test must be
                                                                                repeated for that analyte (i.e., the
                                                                                sampling and/or analytical procedure
                                                                                should be adjusted before a retest).
                                                                                The %R value for each compound must be
                                                                                reported in the test report, and all
                                                                                field measurements must be corrected
                                                                                with the calculated %R value for that
                                                                                compound by using the following
                                                                                equation: Reported Results = ((Measured
                                                                                Concentration in the Stack)/(%R)) x
                                                                                100. ASTM D6348-03 is incorporated by
                                                                                reference, see Sec.   63.14.
                                                                                (c) you must conduct testing of
                                                                                emissions from continuous solvent
                                                                                coating process vents and combinations
                                                                                of batch and continuous solvent coating
                                                                                process vents at normal operating
                                                                                conditions, as specified in Sec.
                                                                                63.5535;
                                                                                (d) you must conduct testing of
                                                                                emissions from batch solvent coating
                                                                                process vents as specified in Sec.
                                                                                63.490(c), except that the emission
                                                                                reductions required for process vents
                                                                                under this subpart supersede the
                                                                                emission reductions required for
                                                                                process vents under subpart U of this
                                                                                part; and
                                                                                (e) you must collect CPMS data during
                                                                                the period of the initial compliance
                                                                                demonstration and determine the CPMS
                                                                                operating limit during the period of
                                                                                the initial compliance demonstration.

4. the sum of all cellulose ether     a. each existing or     i. measure total         (1) EPA Method 18 in     (a) you must conduct testing of
 process vents.                        new cellulose ether     organic HAP emissions.   appendix A-6 to part     emissions at the inlet and outlet of
                                       operation.                                       60 of this chapter or    each control device;
                                                                                Method 320 in appendix  (b) you may use EPA Method 18 or 320 to
                                                                                A to this part, or       determine the control efficiency of any
                                                                                control device for organic compounds;
                                                                                for a combustion device, you must use
                                                                                only HAP that are present in the inlet
                                                                                to the control device to characterize
                                                                                the percent reduction across the
                                                                                combustion device;
                                                                                (c) you must conduct testing of
                                                                                emissions from continuous cellulose
                                                                                ether process vents and combinations of
                                                                                batch and continuous cellulose ether
                                                                                process vents at normal operating
                                                                                conditions, as specified in Sec.
                                                                                63.5535;
                                                                                (d) you must conduct testing of
                                                                                emissions from batch cellulose ether
                                                                                process vents as specified in Sec.
                                                                                63.490(c), except that the emission
                                                                                reductions required for process vents
                                                                                under this subpart supersede the
                                                                                emission reductions required for
                                                                                process vents under subpart U of this
                                                                                part; and
                                                                                (e) you must collect CPMS data during
                                                                                the period of the initial performance
                                                                                test and determine the CPMS operating
                                                                                limit during the period of the initial
                                                                                performance test.
                                                              .......................  (2) ASTM D6420-99        (a) you must conduct testing of
                                                                                (Reapproved 2010); or    emissions at the inlet and outlet of
                                                                                each control device;
                                                                                (b) you may use ASTM D6420-99
                                                                                (Reapproved 2010) as an alternative to
                                                                                EPA Method 18 only where: The target
                                                                                compound(s) are known and are listed in
                                                                                ASTM D6420 as measurable; this ASTM
                                                                                should not be used for methane and
                                                                                ethane because their atomic mass is
                                                                                less than 35; ASTM D6420 should never
                                                                                be specified as a total VOC method;
                                                                                (c) you must conduct testing of
                                                                                emissions from continuous cellulose
                                                                                ether process vents and combinations of
                                                                                batch and continuous cellulose ether
                                                                                process vents at normal operating
                                                                                conditions, as specified in Sec.
                                                                                63.5535;
                                                                                (d) you must conduct testing of
                                                                                emissions from batch cellulose ether
                                                                                process vents as specified in Sec.
                                                                                63.490(c), except that the emission
                                                                                reductions required for process vents
                                                                                under this subpart supersede the
                                                                                emission reductions required for
                                                                                process vents under subpart U of this
                                                                                part; and
                                                                                (e) you must collect CPMS data during
                                                                                the period of the initial performance
                                                                                test and determine the CPMS operating
                                                                                limit during the period of the initial
                                                                                performance test.

                                                              .......................  (3) ASTM D6348-12e1.     (a) you must conduct testing of
                                                                                emissions at the inlet and outlet of
                                                                                each control device;
                                                                                (b) you may use ASTM D6348-12e1 as an
                                                                                alternative to EPA Method 320 only
                                                                                where the following conditions are met:
                                                                                (1) The test plan preparation and
                                                                                implementation in the Annexes to ASTM D
                                                                                6348-03, Sections A1 through A8 are
                                                                                mandatory; and (2) in ASTM D6348-03
                                                                                Annex A5 (Analyte Spiking Technique),
                                                                                the percent recovery (%R) must be
                                                                                determined for each target analyte
                                                                                (Equation A5.5). In order for the test
                                                                                data to be acceptable for a compound,
                                                                                %R must be greater than or equal to 70
                                                                                percent and less than or equal to 130
                                                                                percent. If the %R value does not meet
                                                                                this criterion for a target compound,
                                                                                the test data are not acceptable for
                                                                                that compound and the test must be
                                                                                repeated for that analyte (i.e., the
                                                                                sampling and/or analytical procedure
                                                                                should be adjusted before a retest).
                                                                                The %R value for each compound must be
                                                                                reported in the test report, and all
                                                                                field measurements must be corrected
                                                                                with the calculated %R value for that
                                                                                compound by using the following
                                                                                equation: Reported Results = ((Measured
                                                                                Concentration in the Stack)/(%R)) x
                                                                                100.
                                                                                (c) you must conduct testing of
                                                                                emissions from continuous solvent
                                                                                coating process vents and combinations
                                                                                of batch and continuous solvent coating
                                                                                process vents at normal operating
                                                                                conditions, as specified in Sec.
                                                                                63.5535;
                                                                                (d) you must conduct testing of
                                                                                emissions from batch solvent coating
                                                                                process vents as specified in Sec.
                                                                                63.490(c), except that the emission
                                                                                reductions required for process vents
                                                                                under this subpart supersede the
                                                                                emission reductions required for
                                                                                process vents under subpart U of this
                                                                                part; and
                                                                                (e) you must collect CPMS data during
                                                                                the period of the initial compliance
                                                                                demonstration and determine the CPMS
                                                                                operating limit during the period of
                                                                                the initial compliance demonstration.
                                                              .......................  (4) EPA Method 25 in     (a) you must conduct testing of
                                                                                appendix A-7 to part     emissions at the inlet and outlet of
                                                                                60 of this chapter; or   each control device;
                                                                                (b) you may use EPA Method 25 to
                                                                                determine the control efficiency of
                                                                                combustion devices for organic
                                                                                compounds; you may not use EPA Method
                                                                                25 to determine the control efficiency
                                                                                of noncombustion control devices;
                                                                                (c) you must conduct testing of
                                                                                emissions from continuous cellulose
                                                                                ether process vents and combinations of
                                                                                batch and continuous cellulose ether
                                                                                process vents at normal operating
                                                                                conditions, as specified in Sec.
                                                                                63.5535;
                                                                                (d) you must conduct testing of
                                                                                emissions from batch cellulose ether
                                                                                process vents as specified in Sec.
                                                                                63.490(c), except that the emission
                                                                                reductions required for process vents
                                                                                under this subpart supersede the
                                                                                emission reductions required for
                                                                                process vents under subpart U of this
                                                                                part; and
                                                                                (e) you must collect CPMS data during
                                                                                the period of the initial performance
                                                                                test and determine the CPMS operating
                                                                                limit during the period of the initial
                                                                                performance test

                                                              .......................  (5) EPA Method 25A in    (a) you must conduct testing of
                                                                                appendix A-7 to part     emissions at the inlet and outlet of
                                                                                60 of this chapter.      each control device;
                                                                                (b) you may use EPA Method 25A if: An
                                                                                exhaust gas volatile organic matter
                                                                                concentration of 50 ppmv or less is
                                                                                required in order to comply with the
                                                                                emission limit; the volatile organic
                                                                                matter concentration at the inlet to
                                                                                the control device and the required
                                                                                level of control are such as to result
                                                                                in exhaust volatile organic matter
                                                                                concentrations of 50 ppmv or less; or
                                                                                because of the high control efficiency
                                                                                of the control device, the anticipated
                                                                                volatile organic matter concentration
                                                                                at the control device exhaust is 50
                                                                                ppmv or less, regardless of the inlet
                                                                                concentration;
                                                                                (c) you must conduct testing of
                                                                                emissions from continuous cellulose
                                                                                ether process vents and combinations of
                                                                                batch and continuous cellulose ether
                                                                                process vents at normal operating
                                                                                conditions, as specified in Sec.
                                                                                63.5535;
                                                                                (d) you must conduct testing of
                                                                                emissions from batch cellulose ether
                                                                                process vents as specified in Sec.
                                                                                63.490(c), except that the emission
                                                                                reductions required for process vents
                                                                                under this subpart supersede the
                                                                                emission reductions required for
                                                                                process vents under subpart U of this
                                                                                part; and,
                                                                                (e) you must collect CPMS data during
                                                                                the period of the initial performance
                                                                                test and determine the CPMS operating
                                                                                limit during the period of the initial
                                                                                performance test.
5. each toluene storage vessel......  a. each existing or     i. measure toluene       (1) EPA Method 18 in     (a) if venting to a control device to
                                       new cellophane          emissions.               appendix A-6 to part     reduce emissions, you must conduct
                                       operation.                                       60 of this chapter or    testing of emissions at the inlet and
                                                                                Method 320 in appendix   outlet of each control device;
                                                                                A to this part; or      (b) you may use EPA Method 18 or 320 to
                                                                                determine the control efficiency of any
                                                                                control device for organic compounds;
                                                                                for a combustion device, you must use
                                                                                only HAP that are present in the inlet
                                                                                to the control device to characterize
                                                                                the percent reduction across the
                                                                                combustion device;
                                                                                (c) you must conduct testing of
                                                                                emissions from continuous storage
                                                                                vessel vents and combinations of batch
                                                                                and continuous storage vessel vents at
                                                                                normal operating conditions, as
                                                                                specified in Sec.   63.5535 for
                                                                                continuous process vents;
                                                                                (d) you must conduct testing of
                                                                                emissions from batch storage vessel
                                                                                vents as specified in Sec.   63.490(c)
                                                                                for batch process vents, except that
                                                                                the emission reductions required for
                                                                                process vents under this subpart
                                                                                supersede the emission reductions
                                                                                required for process vents under
                                                                                subpart U of this part; and,
                                                                                (e) you must collect CPMS data during
                                                                                the period of the initial compliance
                                                                                demonstration and determine the CPMS
                                                                                operating limit during the period of
                                                                                the initial compliance demonstration.

                                                              .......................  (2) ASTM D6420-99; or    (a) if venting to a control device to
                                                                                reduce emissions, you must conduct
                                                                                testing of emissions at the inlet and
                                                                                outlet of each control device;
                                                                                (b) you may use ASTM D6420-99
                                                                                (Reapproved 2010) as an alternative to
                                                                                EPA Method 18 only where: The target
                                                                                compound(s) are known and are listed in
                                                                                ASTM D6420 as measurable; this ASTM
                                                                                should not be used for methane and
                                                                                ethane because their atomic mass is
                                                                                less than 35; ASTM D6420 should never
                                                                                be specified as a total VOC method;
                                                                                (c) you must conduct testing of
                                                                                emissions from continuous storage
                                                                                vessel vents and combinations of batch
                                                                                and continuous storage vessel vents at
                                                                                normal operating conditions, as
                                                                                specified in Sec.   63.5535 for
                                                                                continuous process vents;
                                                                                (d) you must conduct testing of
                                                                                emissions from batch storage vessel
                                                                                vents as specified in Sec.   63.490(c)
                                                                                for batch process vents, except that
                                                                                the emission reductions required for
                                                                                process vents under this subpart
                                                                                supersede the emission reductions
                                                                                required for process vents under
                                                                                subpart U of this part; and,
                                                                                (e) you must collect CPMS data during
                                                                                the period of the initial compliance
                                                                                demonstration and determine the CPMS
                                                                                operating limit during the period of
                                                                                the initial compliance demonstration.

                                                              .......................  (3) ASTM D6348-12e1.     (a) you must conduct testing of
                                                                                emissions at the inlet and outlet of
                                                                                each control device;
                                                                                (b) you may use ASTM D6348-12e1 as an
                                                                                alternative to EPA Method 320 only
                                                                                where the following conditions are met:
                                                                                (1) The test plan preparation and
                                                                                implementation in the Annexes to ASTM D
                                                                                6348-03, Sections A1 through A8 are
                                                                                mandatory; and (2) in ASTM D6348-03
                                                                                Annex A5 (Analyte Spiking Technique),
                                                                                the percent recovery (%R) must be
                                                                                determined for each target analyte
                                                                                (Equation A5.5). In order for the test
                                                                                data to be acceptable for a compound,
                                                                                %R must be greater than or equal to 70
                                                                                percent and less than or equal to 130
                                                                                percent. If the %R value does not meet
                                                                                this criterion for a target compound,
                                                                                the test data are not acceptable for
                                                                                that compound and the test must be
                                                                                repeated for that analyte (i.e., the
                                                                                sampling and/or analytical procedure
                                                                                should be adjusted before a retest).
                                                                                The %R value for each compound must be
                                                                                reported in the test report, and all
                                                                                field measurements must be corrected
                                                                                with the calculated %R value for that
                                                                                compound by using the following
                                                                                equation: Reported Results = ((Measured
                                                                                Concentration in the Stack)/(%R)) x
                                                                                100.
                                                                                (c) you must conduct testing of
                                                                                emissions from continuous solvent
                                                                                coating process vents and combinations
                                                                                of batch and continuous solvent coating
                                                                                process vents at normal operating
                                                                                conditions, as specified in Sec.
                                                                                63.5535;
                                                                                (d) you must conduct testing of
                                                                                emissions from batch solvent coating
                                                                                process vents as specified in Sec.
                                                                                63.490(c), except that the emission
                                                                                reductions required for process vents
                                                                                under this subpart supersede the
                                                                                emission reductions required for
                                                                                process vents under subpart U of this
                                                                                part; and
                                                                                (e) you must collect CPMS data during
                                                                                the period of the initial compliance
                                                                                demonstration and determine the CPMS
                                                                                operating limit during the period of
                                                                                the initial compliance demonstration.
6. the sum of all process vents       each existing or new    measure visible          EPA Method 22 in         you must conduct the flare visible
 controlled using a flare.             affected source.        emissions.               appendix A-7 to part     emissions test according to Sec.
                                                                                60 of this chapter.      63.11(b).
7. equipment leaks..................  a. each existing or     i. measure leak rate.    (1) applicable           you must follow all requirements for the
                                       new cellulose ether                              equipment leak test      applicable equipment leak test methods
                                       operation.                                       methods in Sec.          in Sec.   63.180; or
                                                                                63.180; or
                                                              .......................  (2) applicable           you must follow all requirements for the
                                                                                equipment leak test      applicable equipment leak test methods
                                                                                methods in Sec.          in Sec.   63.1023.
                                                                                63.1023.
8. all sources of wastewater          a. each existing or     i. measure wastewater    (1) applicable           (a) You must follow all requirements for
 emissions.                            new cellulose ether     HAP emissions.           wastewater test          the applicable wastewater test methods
                                       operation.                                       methods and procedures   and procedures in Sec.  Sec.   63.144
                                                                                in Sec.  Sec.   63.144   and 63.145; or
                                                                                and 63.145; or

                                                              .......................  (2) applicable           (a) you must follow all requirements for
                                                                                wastewater test          the applicable waste water test methods
                                                                                methods and procedures   and procedures in Sec.  Sec.   63.144
                                                                                in Sec.  Sec.   63.144   and 63.145, except that you may use
                                                                                and 63.145, using ASTM   ASTM D5790-95 (Reapproved 2012) as an
                                                                                D5790-95 (Reapproved     alternative to EPA Method 624, under
                                                                                2012) (incorporated by   the condition that this ASTM method be
                                                                                reference--see Sec.      used with the sampling procedures of
                                                                                63.14) as an             EPA Method 25D or an equivalent method.
                                                                                alternative to EPA
                                                                                Method 624 in appendix
                                                                                A to part 163 of this
                                                                                chapter.
9. any emission point...............  a. each existing or     i. conduct a CEMS        (1) applicable           (a) you must conduct the CEMS
                                       new affected source     performance              requirements in Sec.     performance evaluation during the
                                       using a CEMS to         evaluation.              63.8 and applicable      period of the initial compliance
                                       demonstrate                                      performance              demonstration according to the
                                       compliance.                                      specification (PS-7,     applicable requirements in Sec.   63.8
                                                                                PS-8, PS-9, or PS-15)    and the applicable performance
                                                                                in appendix B to part    specification (PS-7, PS-8, PS-9, or PS-
                                                                                60 of this chapter.      15) of 40 CFR part 60, appendix B;
                                                                                (b) you must install, operate, and