test.
                                                                ii. The average total    Collecting the hourly
                                                                 power and secondary      and 3-hr rolling
                                                                 current to the control   average total power
                                                                 device must not fall     and secondary current
                                                                 below the operating      monitoring data
                                                                 limit established        according to Sec.
                                                                 during the performance   63.1572; and
                                                                 test.                    maintaining the 3-hr
                                                                                rolling average total
                                                                                power and secondary
                                                                                current at or above
                                                                                the limit established
                                                                                during the performance
                                                                                test.
                                       c. Continuous            i. The average liquid-   Collecting the hourly
                                        parametric monitoring    to-gas ratio must not    and 3-hr rolling
                                        systems--wet scrubber.   fall below the           average gas flow rate
                                                                 operating limit          and scrubber liquid
                                                                 established during the   flow rate monitoring
                                                                 performance test.        data according to Sec.
                                                                                63.1572; determining
                                                                                and recording the 3-hr
                                                                                liquid-to-gas ratio;
                                                                                and maintaining the 3-
                                                                                hr rolling average
                                                                                liquid-to-gas ratio at
                                                                                or above the limit
                                                                                established during the
                                                                                performance test.

                                                                ii. Except for periods   Collecting the hourly
                                                                 of startup, shutdown     and 3-hr rolling
                                                                 and hot standby, the     average pressure drop
                                                                 average pressure drop    monitoring data
                                                                 across the scrubber      according to Sec.
                                                                 must not fall below      63.1572; and except
                                                                 the operating limit      for periods of
                                                                 established during the   startup, shutdown and
                                                                 performance test.        hot standby,
                                                                                maintaining the 3-hr
                                                                                rolling average
                                                                                pressure drop at or
                                                                                above the limit
                                                                                established during the
                                                                                performance test.
                                       d. BLD--fabric filter..  Increases in relative    Collecting and
                                                                 particulate.             maintaining records of
                                                                                BLD system output;
                                                                                determining the cause
                                                                                of the alarm within 1
                                                                                hour of the alarm; and
                                                                                alleviating the cause
                                                                                of the alarm within 3
                                                                                hours by corrective
                                                                                action.
3. Subject to NSPS for PM in 40 CFR    PM CEMS................  Not applicable.........  Complying with Table 6
 60.102a(b)(1), electing to meet the                                                      of this subpart, item
 PM concentration limit.                                                                  4 or 5.
4. Option 1a: Elect NSPS subpart J     Continuous opacity       The 3-hour average       Collecting the 3-hr
 requirements for PM per coke burn-     monitoring system.       opacity of emissions     rolling average
 off limit, not subject to the NSPS                              from your catalyst       continuous opacity
 for PM in 40 CFR 60.102 or                                      regenerator vent must    monitoring system data
 60.102a(b)(1).                                                  not exceed 20 percent.   according to Sec.
                                                                                63.1572; and
                                                                                maintaining the 3-hr
                                                                                rolling average
                                                                                opacity no higher than
                                                                                20 percent.
5. Option 1b: Elect NSPS subpart Ja    a. Continuous opacity    The opacity of           Collecting the 3-hr
 requirements for PM per coke burn-     monitoring system.       emissions from your      rolling average
 off limit, not subject to the NSPS                              catalyst regenerator     continuous opacity
 for PM in 40 CFR 60.102 or                                      vent must not exceed     monitoring system data
 60.102a(b)(1).                                                  the site-specific        according to Sec.
                                                                 opacity operating        63.1572; maintaining
                                                                 limit established        the 3-hr rolling
                                                                 during the performance   average opacity at or
                                                                 test.                    below the site-
                                                                                specific limit.

                                       b. Continuous            See item 2.b of this     See item 2.b of this
                                        parametric monitoring    table.                   table.
                                        systems--electrostatic
                                        precipitator.
                                       c. Continuous            See item 2.c of this     See item 2.c of this
                                        parametric monitoring    table.                   table.
                                        systems--wet scrubber.
                                       d. BLD--fabric filter..  See item 2.d of this     See item 2.d of this
                                                                 table.                   table.
6. Option 1c: Elect NSPS subpart Ja    PM CEMS................  Not applicable.........  Complying with Table 6
 requirements for PM concentration                                                        of this subpart, item
 limit, not subject to the NSPS for                                                       4.
 PM in 40 CFR 60.102 or 60.102a(b)(1).
7. Option 2: PM per coke burn-off      a. Continuous opacity    The opacity of           Collecting the hourly
 limit, not subject to the NSPS for     monitoring system.       emissions from your      and 3-hr rolling
 PM in 40 CFR 60.102 or 60.102a(b)(1).                           catalyst regenerator     average continuous
                                                                 vent must not exceed     opacity monitoring
                                                                 the site-specific        system data according
                                                                 opacity operating        to Sec.   63.1572; and
                                                                 limit established        maintaining the 3-hr
                                                                 during the performance   rolling average
                                                                 test.                    opacity at or below
                                                                                the site-specific
                                                                                limit established
                                                                                during the performance
                                                                                test. Alternatively,
                                                                                before August 1, 2017,
                                                                                collecting the hourly
                                                                                average continuous
                                                                                opacity monitoring
                                                                                system data according
                                                                                to Sec.   63.1572; and
                                                                                maintaining the hourly
                                                                                average opacity at or
                                                                                below the site-
                                                                                specific limit.
                                       b. Continuous parameter  i. The average coke      Collecting the hourly
                                        monitoring systems--     burn-off rate or         and daily average coke
                                        electrostatic            average gas flow rate    burn-off rate or gas
                                        precipitator.            entering or exiting      flow rate monitoring
                                                                 the control device       data according to Sec.
                                                                 must not exceed the        63.1572; and
                                                                 operating limit          maintaining the daily
                                                                 established during the   coke burn-off rate or
                                                                 performance test.        average gas flow rate
                                                                                at or below the limit
                                                                                established during the
                                                                                performance test.
                                                                ii. The average total    Collecting the hourly
                                                                 power (voltage and       and 3-hr rolling
                                                                 current) and secondary   average total power
                                                                 current to the control   and secondary current
                                                                 device must not fall     monitoring data
                                                                 below the operating      according to Sec.
                                                                 limit established        63.1572; and
                                                                 during the performance   maintaining the 3-hr
                                                                 test.                    rolling average total
                                                                                power and secondary
                                                                                current at or above
                                                                                the limit established
                                                                                during the performance
                                                                                test. Alternatively,
                                                                                before August 1, 2017,
                                                                                collecting the hourly
                                                                                and daily average
                                                                                voltage and secondary
                                                                                current (or total
                                                                                power input)
                                                                                monitoring data
                                                                                according to Sec.
                                                                                63.1572; and
                                                                                maintaining the daily
                                                                                average voltage and
                                                                                secondary current (or
                                                                                total power input) at
                                                                                or above the limit
                                                                                established during the
                                                                                performance test.

                                       c. Continuous parameter  i. The average liquid-   Collecting the hourly
                                        monitoring systems--     to-gas ratio must not    and 3-hr rolling
                                        wet scrubber.            fall below the           average gas flow rate
                                                                 operating limit          and scrubber liquid
                                                                 established during the   flow rate monitoring
                                                                 performance test.        data according to Sec.
                                                                                63.1572; determining
                                                                                and recording the 3-hr
                                                                                liquid-to-gas ratio;
                                                                                and maintaining the 3-
                                                                                hr rolling average
                                                                                liquid-to-gas ratio at
                                                                                or above the limit
                                                                                established during the
                                                                                performance test.
                                                                                Alternatively, before
                                                                                August 1, 2017,
                                                                                collecting the hourly
                                                                                average gas flow rate
                                                                                and water (or
                                                                                scrubbing liquid) flow
                                                                                rate monitoring data
                                                                                according to Sec.
                                                                                63.1572 \1\;
                                                                                determining and
                                                                                recording the hourly
                                                                                average liquid-to-gas
                                                                                ratio; determining and
                                                                                recording the daily
                                                                                average liquid-to-gas
                                                                                ratio; and maintaining
                                                                                the daily average
                                                                                liquid-to-gas ratio
                                                                                above the limit
                                                                                established during the
                                                                                performance test.
                                                                ii. Except for periods   Collecting the hourly
                                                                 of startup, shutdown     and 3-hr rolling
                                                                 and hot standby, the     average pressure drop
                                                                 average pressure drop    monitoring data
                                                                 across the scrubber      according to Sec.
                                                                 must not fall below      63.1572; and except
                                                                 the operating limit      for periods of
                                                                 established during the   startup, shutdown and
                                                                 performance test.        hot standby,
                                                                                maintaining the 3-hr
                                                                                rolling average
                                                                                pressure drop at or
                                                                                above the limit
                                                                                established during the
                                                                                performance test.
                                                                                Alternatively, before
                                                                                August 1, 2017,
                                                                                collecting the hourly
                                                                                and daily average
                                                                                pressure drop
                                                                                monitoring data
                                                                                according to Sec.
                                                                                63.1572; and
                                                                                maintaining the daily
                                                                                average pressure drop
                                                                                above the limit
                                                                                established during the
                                                                                performance test.
                                       d. BLD--fabric filter..  See item 2.d of this     See item 2.d of this
                                                                 table.                   table.
8. Option 3: Ni lb/hr limit not        a. Continuous opacity    i. The daily average Ni  (1) Collecting the
 subject to the NSPS for PM in 40 CFR   monitoring system.       operating value must     hourly average
 60.102.                                                         not exceed the site-     continuous opacity
                                                                 specific Ni operating    monitoring system data
                                                                 limit established        according to Sec.
                                                                 during the performance   63.1572; determining
                                                                 test.                    and recording
                                                                                equilibrium catalyst
                                                                                Ni concentration at
                                                                                least once a week \2\;
                                                                                collecting the hourly
                                                                                average gas flow rate
                                                                                monitoring data
                                                                                according to Sec.
                                                                                63.1572 \1\; and
                                                                                determining and
                                                                                recording the hourly
                                                                                average Ni operating
                                                                                value using Equation
                                                                                11 of Sec.   63.1564.

                                                                                (2) Determining and
                                                                                recording the 3-hour
                                                                                rolling average Ni
                                                                                operating value and
                                                                                maintaining the 3-hour
                                                                                rolling average Ni
                                                                                operating value below
                                                                                the site-specific Ni
                                                                                operating limit
                                                                                established during the
                                                                                performance test.
                                                                                Alternatively, before
                                                                                August 1, 2017,
                                                                                determining and
                                                                                recording the daily
                                                                                average Ni operating
                                                                                value and maintaining
                                                                                the daily average Ni
                                                                                operating value below
                                                                                the site-specific Ni
                                                                                operating limit
                                                                                established during the
                                                                                performance test.
                                       b. Continuous parameter  i. The average gas flow  See item 7.b.i of this
                                        monitoring systems--     rate entering or         table.
                                        electrostatic            exiting the control
                                        precipitator.            device must not exceed
                                                                 the operating limit
                                                                 established during the
                                                                 performance test.
                                                                ii. The average total    See item 7.b.ii of this
                                                                 power (voltage and       table.
                                                                 current) and secondary
                                                                 current must not fall
                                                                 below the level
                                                                 established in the
                                                                 performance test.
                                                                iii. The monthly         Determining and
                                                                 rolling average of the   recording the
                                                                 equilibrium catalyst     equilibrium catalyst
                                                                 Ni concentration must    Ni concentration at
                                                                 not exceed the level     least once a week \2\;
                                                                 established during the   determining and
                                                                 performance test.        recording the monthly
                                                                                rolling average of the
                                                                                equilibrium catalyst
                                                                                Ni concentration once
                                                                                each week using the
                                                                                weekly or most recent
                                                                                value; and maintaining
                                                                                the monthly rolling
                                                                                average below the
                                                                                limit established in
                                                                                the performance test.
                                       c. Continuous parameter  i. The average liquid-   See item 7.c.i of this
                                        monitoring systems--     to-gas ratio must not    table.
                                        wet scrubber.            fall below the
                                                                 operating limit
                                                                 established during the
                                                                 performance test..
                                                                ii. Except for periods   See item 7.c.ii of this
                                                                 of startup, shutdown     table.
                                                                 and hot standby, the
                                                                 average pressure drop
                                                                 must not fall below
                                                                 the operating limit
                                                                 established in the
                                                                 performance test.
                                                                iii. The monthly         Determining and
                                                                 rolling average          recording the
                                                                 equilibrium catalyst     equilibrium catalyst
                                                                 Ni concentration must    Ni concentration at
                                                                 not exceed the level     least once a week \2\;
                                                                 established during the   determining and
                                                                 performance test.        recording the monthly
                                                                                rolling average of
                                                                                equilibrium catalyst
                                                                                Ni concentration once
                                                                                each week using the
                                                                                weekly or most recent
                                                                                value; and maintaining
                                                                                the monthly rolling
                                                                                average below the
                                                                                limit established in
                                                                                the performance test.
                                       d. BLD--fabric filter..  i. Increases in          See item 7.d of this
                                                                 relative particulate.    table.

                                                                ii. The monthly rolling  Determining and
                                                                 average of the           recording the
                                                                 equilibrium catalyst     equilibrium catalyst
                                                                 Ni concentration must    Ni concentration at
                                                                 not exceed the level     least once a week \2\;
                                                                 established during the   determining and
                                                                 performance test.        recording the monthly
                                                                                rolling average of the
                                                                                equilibrium catalyst
                                                                                Ni concentration once
                                                                                each week using the
                                                                                weekly or most recent
                                                                                value; and maintaining
                                                                                the monthly rolling
                                                                                average below the
                                                                                limit established in
                                                                                the performance test.
9. Option 4: Ni per coke burn-off      a. Continuous opacity    i. The daily average Ni  (1) Collecting the
 limit not subject to the NSPS for PM   monitoring system.       operating value must     hourly average
 in 40 CFR 60.102.                                               not exceed the site-     continuous opacity
                                                                 specific Ni operating    monitoring system data
                                                                 limit established        according to Sec.
                                                                 during the performance   63.1572; collecting
                                                                 test.                    the hourly average
                                                                                coke burn rate and
                                                                                hourly average gas
                                                                                flow rate monitoring
                                                                                data according to Sec.
                                                                                63.15721;
                                                                                determining and
                                                                                recording equilibrium
                                                                                catalyst Ni
                                                                                concentration at least
                                                                                once a week \2\; and
                                                                                determining and
                                                                                recording the hourly
                                                                                average Ni operating
                                                                                value using Equation
                                                                                12 of Sec.   63.1564.
                                                                                (2) Determining and
                                                                                recording the 3-hour
                                                                                rolling average Ni
                                                                                operating value and
                                                                                maintaining the 3-hour
                                                                                rolling average Ni
                                                                                operating value below
                                                                                the site-specific Ni
                                                                                operating limit
                                                                                established during the
                                                                                performance test
                                                                                Alternatively, before
                                                                                August 1, 2017,
                                                                                determining and
                                                                                recording the daily
                                                                                average Ni operating
                                                                                value and maintaining
                                                                                the daily average Ni
                                                                                operating value below
                                                                                the site-specific Ni
                                                                                operating limit
                                                                                established during the
                                                                                performance test.
                                       b. Continuous parameter  i. The average gas flow  See item 7.b.i of this
                                        monitoring systems--     rate to the control      table.
                                        electrostatic            device must not exceed
                                        precipitator.            the level established
                                                                 in the performance
                                                                 test.
                                                                ii. The average voltage  See item 7.b.ii of this
                                                                 and secondary current    table.
                                                                 (or total power input)
                                                                 must not fall below
                                                                 the level established
                                                                 in the performance
                                                                 test.
                                                                iii. The monthly         See item 8.b.iii of
                                                                 rolling average          this table.
                                                                 equilibrium catalyst
                                                                 Ni concentration must
                                                                 not exceed the level
                                                                 established during the
                                                                 performance test.
                                       c. Continuous parameter  i. The average liquid-   See item 7.c.i of this
                                        monitoring systems--     to-gas ratio must not    table.
                                        wet scrubber.            fall below the
                                                                 operating limit
                                                                 established during the
                                                                 performance test.
                                                                ii. Except for periods   See item 7.c.ii of this
                                                                 of startup, shutdown     table.
                                                                 and hot standby, the
                                                                 daily average pressure
                                                                 drop must not fall
                                                                 below the operating
                                                                 limit established in
                                                                 the performance test.

                                                                iii. The monthly         See item 8.c.iii of
                                                                 rolling average          this table.
                                                                 equilibrium catalyst
                                                                 Ni concentration must
                                                                 not exceed the level
                                                                 established during the
                                                                 performance test.
                                       d. BLD--fabric filter..  i. See item 2.d of this  See item 2.d of this
                                                                 table.                   table.
                                                                ii. The monthly rolling  Determining and
                                                                 average of the           recording the
                                                                 equilibrium catalyst     equilibrium catalyst
                                                                 Ni concentration must    Ni concentration at
                                                                 not exceed the level     least once a week \2\;
                                                                 established during the   determining and
                                                                 performance test.        recording the monthly
                                                                                rolling average of the
                                                                                equilibrium catalyst
                                                                                Ni concentration once
                                                                                each week using the
                                                                                weekly or most recent
                                                                                value; and maintaining
                                                                                the monthly rolling
                                                                                average below the
                                                                                limit established in
                                                                                the performance test.
10. During periods of startup,         Any control device, if   The inlet velocity       Meeting the
 shutdown, or hot standby.              elected.                 limit to the primary     requirements in Sec.
                                                                 internal cyclones of     63.1564(c)(5).
                                                                 the catalytic cracking
                                                                 unit catalyst
                                                                 regenerator in Sec.
                                                                 63.1564(a)(5)(ii).
----------------------------------------------------------------------------------------------------------------
\1\ If applicable, you can use the alternative in Sec.   63.1573(a)(1) for gas flow rate instead of a continuous
  parameter monitoring system if you used the alternative method in the initial performance test.
\2\ The equilibrium catalyst Ni concentration must be measured by the procedure, Determination of Metal
  Concentration on Catalyst Particles (Instrumental Analyzer Procedure) in appendix A to this subpart; or by EPA
  Method 6010B, Inductively Coupled Plasma-Atomic Emission Spectrometry, EPA Method 6020, Inductively Coupled
  Plasma-Mass Spectrometry, EPA Method 7520, Nickel Atomic Absorption, Direct Aspiration, or EPA Method 7521,
  Nickel Atomic Absorption, Direct Aspiration; or by an alternative to EPA Method 6010B, 6020, 7520, or 7521
  satisfactory to the Administrator. The EPA Methods 6010B, 6020, 7520, and 7521 are included in ``Test Methods
  for Evaluating Solid Waste, Physical/Chemical Methods,'' EPA Publication SW-846, Revision 5 (April 1998). The
  SW-846 and Updates (document number<PHONE_NUMBER>0-1) are available for purchase from the Superintendent of
  Documents, U.S. Government Publishing Office, Washington, DC 20402,<PHONE_NUMBER>; and from the National
  Technical Information Services (NTIS), 5285 Port Royal Road, Springfield, VA 22161,<PHONE_NUMBER>. Copies may
  be inspected at the EPA Docket Center, William Jefferson Clinton (WJC) West Building (Air Docket), Room 3334,
  1301 Constitution Ave. NW., Washington, DC; or at the Office of the Federal Register, 800 North Capitol Street
  NW., Suite 700, Washington, DC. These methods are also available at http://www.epa.gov/epaoswer/hazwaste/test/main.htm.

0
59. Table 8 to subpart UUU of part 63 is revised to read as follows:
    As stated in Sec.  63.1565(a)(1), you shall meet each emission
limitation in the following table that applies to you.

   Table 8 to Subpart UUU of Part 63--Organic HAP Emission Limits for
                        Catalytic Cracking Units
------------------------------------------------------------------------
                                           You shall meet the following
  For each new and existing catalytic        emission limit for each
          cracking unit . . .             catalyst  regenerator vent . .
                                                        .
------------------------------------------------------------------------
1. Subject to the NSPS for carbon        CO emissions from the catalyst
 monoxide (CO) in 40 CFR 60.103 or        regenerator vent or CO boiler
 60.102a(b)(4).                           serving the catalytic cracking
                                          unit must not exceed 500 parts
                                          per million volume (ppmv) (dry
                                          basis).
2. Not subject to the NSPS for CO in 40  a. CO emissions from the
 CFR 60.103 or 60.102a(b)(4).             catalyst regenerator vent or
                                          CO boiler serving the
                                          catalytic cracking unit must
                                          not exceed 500 ppmv (dry
                                          basis).
                                         b. If you use a flare to meet
                                          the CO limit, then on and
                                          after January 30, 2019, the
                                          flare must meet the
                                          requirements of Sec.   63.670.
                                          Prior to January 30, 2019, the
                                          flare must meet the
                                          requirements for control
                                          devices in Sec.   63.11(b) and
                                          visible emissions must not
                                          exceed a total of 5 minutes
                                          during any 2 consecutive
                                          hours, or the flare must meet
                                          the requirements of Sec.
                                          63.670.
------------------------------------------------------------------------

0
60. Table 9 to subpart UUU of part 63 is revised to read as follows:

    As stated in Sec.  63.1565(a)(2), you shall meet each operating
limit in the following table that applies to you.

   Table 9 to Subpart UUU of Part 63--Operating Limits for Organic HAP Emissions From Catalytic Cracking Units
----------------------------------------------------------------------------------------------------------------
                                           For this type of
  For each new or existing catalytic    continuous  monitoring      For this type of       You shall meet this
         cracking unit . . .                 system . . .        control  device . . .    operating  limit . . .
----------------------------------------------------------------------------------------------------------------
1. Subject to the NSPS for carbon      Continuous emission      Not applicable.........  Not applicable.
 monoxide (CO) in 40 CFR 60.103 or      monitoring system.
 60.102a(b)(4).
2. Not subject to the NSPS for CO in   a. Continuous emission   Not applicable.........  Not applicable.
 40 CFR 60.103 or 60.102a(b)(4).        monitoring system.
                                       b. Continuous parameter  i. Thermal incinerator.  Maintain the daily
                                        monitoring systems.                               average combustion
                                                                                zone temperature above
                                                                                the limit established
                                                                                during the performance
                                                                                test; and maintain the
                                                                                daily average oxygen
                                                                                concentration in the
                                                                                vent stream (percent,
                                                                                dry basis) above the
                                                                                limit established
                                                                                during the performance
                                                                                test.
                                                                ii. Boiler or process    Maintain the daily
                                                                 heater with a design     average combustion
                                                                 heat input capacity      zone temperature above
                                                                 under 44 MW or a         the limit established
                                                                 boiler or process        in the performance
                                                                 heater in which all      test.
                                                                 vent streams are not
                                                                 introduced into the
                                                                 flame zone.
                                                                iii. Flare.............  On and after January
                                                                                30, 2019, the flare
                                                                                must meet the
                                                                                requirements of Sec.
                                                                                63.670. Prior to
                                                                                January 30, 2019, the
                                                                                flare pilot light must
                                                                                be present at all
                                                                                times and the flare
                                                                                must be operating at
                                                                                all times that
                                                                                emissions may be
                                                                                vented to it, or the
                                                                                flare must meet the
                                                                                requirements of Sec.
                                                                                63.670.
3. During periods of startup,          Any....................  Any....................  Meet the requirements
 shutdown or hot standby.                                                                 in Sec.
                                                                                63.1565(a)(5).
----------------------------------------------------------------------------------------------------------------

0
61. Table 10 to subpart UUU of part 63 is revised to read as follows:
    As stated in Sec.  63.1565(b)(1), you shall meet each requirement
in the following table that applies to you.

  Table 10 to Subpart UUU of Part 63--Continuous Monitoring Systems for
           Organic HAP Emissions From Catalytic Cracking Units
------------------------------------------------------------------------
                                                      You shall install,
                                   And you use this      operate, and
    For each new or existing        type of control   maintain this type
 catalytic cracking  unit . . .     device for your      of continuous
                                      vent . . .       monitoring system
                                                             . . .
------------------------------------------------------------------------
1. Subject to the NSPS for        Not applicable....  Continuous
 carbon monoxide (CO) in 40 CFR                        emission
 60.103 or 60.102a(b)(4).                              monitoring system
                                                       to measure and
                                                       record the
                                                       concentration by
                                                       volume (dry
                                                       basis) of CO
                                                       emissions from
                                                       each catalyst
                                                       regenerator vent.
2. Not subject to the NSPS for    a. Thermal          Continuous
 CO in 40 CFR 60.103 or            incinerator.        emission
 60.102a(b)(4).                                        monitoring system
                                                       to measure and
                                                       record the
                                                       concentration by
                                                       volume (dry
                                                       basis) of CO
                                                       emissions from
                                                       each catalyst
                                                       regenerator vent;
                                                       or continuous
                                                       parameter
                                                       monitoring
                                                       systems to
                                                       measure and
                                                       record the
                                                       combustion zone
                                                       temperature and
                                                       oxygen content
                                                       (percent, dry
                                                       basis) in the
                                                       incinerator vent
                                                       stream.
                                  b. Process heater   Continuous
                                   or boiler with a    emission
                                   design heat input   monitoring system
                                   capacity under 44   to measure and
                                   MW or process       record the
                                   heater or boiler    concentration by
                                   in which all vent   volume (dry
                                   streams are not     basis) of CO
                                   introduced into     emissions from
                                   the flame zone.     each catalyst
                                                       regenerator vent;
                                                       or continuous
                                                       parameter
                                                       monitoring
                                                       systems to
                                                       measure and
                                                       record the
                                                       combustion zone
                                                       temperature.

                                  c. Flare..........  On and after
                                                       January 30, 2019,
                                                       the monitoring
                                                       systems required
                                                       in Sec.  Sec.
                                                       63.670 and
                                                       63.671. Prior to
                                                       January 30, 2019,
                                                       monitoring device
                                                       such as a
                                                       thermocouple, an
                                                       ultraviolet beam
                                                       sensor, or
                                                       infrared sensor
                                                       to continuously
                                                       detect the
                                                       presence of a
                                                       pilot flame, or
                                                       the monitoring
                                                       systems required
                                                       in Sec.  Sec.
                                                       63.670 and
                                                       63.671.
                                  d. No control       Continuous
                                   device.             emission
                                                       monitoring system
                                                       to measure and
                                                       record the
                                                       concentration by
                                                       volume (dry
                                                       basis) of CO
                                                       emissions from
                                                       each catalyst
                                                       regenerator vent.
3. During periods of startup,     Any...............  Continuous
 shutdown or hot standby                               parameter
 electing to comply with the                           monitoring system
 operating limit in Sec.                               to measure and
 63.1565(a)(5)(ii).                                    record the
                                                       concentration by
                                                       volume (dry
                                                       basis) of oxygen
                                                       from each
                                                       catalyst
                                                       regenerator vent.
------------------------------------------------------------------------

0
62. Table 11 to subpart UUU of part 63 is amended by revising the entry
for item 3 to read as follows:
* * * * *

 Table 11 to Subpart UUU of Part 63--Requirements for Performance Tests for Organic HAP Emissions From Catalytic
          Cracking Units Not Subject to New Source Performance Standard (NSPS) for Carbon Monoxide (CO)
----------------------------------------------------------------------------------------------------------------
                                                                                According to these
              For . . .                     You must . . .            Using . . .           requirements . . .
----------------------------------------------------------------------------------------------------------------

                                                   * * * * * *
3. Each catalytic cracking unit        a. Measure the CO        Method 10, 10A, or 10B   .......................
 catalyst regenerator vent if you use   concentration (dry       in appendix A-4 to
 continuous parameter monitoring        basis) of emissions      part 60 of this
 systems.                               exiting the control      chapter, as applicable.
                                        device.
                                       b. Establish each        Data from the            .......................
                                        operating limit in       continuous parameter
                                        Table 9 of this          monitoring systems.
                                        subpart that applies
                                        to you.
                                       c. Thermal incinerator   Data from the            Collect temperature
                                        combustion zone          continuous parameter     monitoring data every
                                        temperature.             monitoring systems.      15 minutes during the
                                                                                entire period of the
                                                                                CO initial performance
                                                                                test; and determine
                                                                                and record the minimum
                                                                                hourly average
                                                                                combustion zone
                                                                                temperature from all
                                                                                the readings.
                                       d. Thermal incinerator:  Data from the            Collect oxygen
                                        oxygen, content          continuous parameter     concentration
                                        (percent, dry basis)     monitoring systems.      (percent, dry basis)
                                        in the incinerator                                monitoring data every
                                        vent stream.                                      15 minutes during the
                                                                                entire period of the
                                                                                CO initial performance
                                                                                test; and determine
                                                                                and record the minimum
                                                                                hourly average percent
                                                                                excess oxygen
                                                                                concentration from all
                                                                                the readings.
                                       e. If you use a process  Data from the            Collect the temperature
                                        heater or boiler with    continuous parameter     monitoring data every
                                        a design heat input      monitoring systems.      15 minutes during the
                                        capacity under 44 MW                              entire period of the
                                        or process heater or                              CO initial performance
                                        boiler in which all                               test; and determine
                                        vent streams are not                              and record the minimum
                                        introduced into the                               hourly average
                                        flame zone, establish                             combustion zone
                                        operating limit for                               temperature from all
                                        combustion zone                                   the readings.
                                        temperature.

                                       f. If you use a flare,   Method 22 (40 CFR part   On and after January
                                        conduct visible          60, appendix A-7).       30, 2019, meet the
                                        emission observations.                            requirements of Sec.
                                                                                63.670. Prior to
                                                                                January 30, 2019,
                                                                                maintain a 2-hour
                                                                                observation period;
                                                                                and record the
                                                                                presence of a flame at
                                                                                the pilot light over
                                                                                the full period of the
                                                                                test or meet the
                                                                                requirements of Sec.
                                                                                63.670.
                                       g. If you use a flare,   40 CFR 63.11(b)(6)       On and after January
                                        determine that the       through (8).             30, 2019, the flare
                                        flare meets the                                   must meet the
                                        requirements for net                              requirements of Sec.
                                        heating value of the                              63.670. Prior to
                                        gas being combusted                               January 30, 2019, the
                                        and exit velocity.                                flare must meet the
                                                                                control device
                                                                                requirements in Sec.
                                                                                63.11(b) or the
                                                                                requirements of Sec.
                                                                                63.670.
----------------------------------------------------------------------------------------------------------------

0
63. Table 12 to subpart UUU of part 63 is revised to read as follows:
    As stated in Sec.  63.1565(b)(4), you shall meet each requirement
in the following table that applies to you.

 Table 12 to Subpart UUU of Part 63--Initial Compliance With Organic HAP
              Emission Limits for Catalytic Cracking Units
------------------------------------------------------------------------
                                For the following
   For each new and existing     emission limit .  You have demonstrated
 catalytic cracking unit . . .         . .         initial compliance if
                                                           . . .
------------------------------------------------------------------------
1. Subject to the NSPS for      CO emissions from  You have already
 carbon monoxide (CO) in 40      your catalyst      conducted a
 CFR 60.103, 60.100(e), or       regenerator vent   performance test to
 60.102a(b)(4).                  or CO boiler       demonstrate initial
                                 serving the        compliance with the
                                 catalytic          NSPS and the
                                 cracking unit      measured CO
                                 must not exceed    emissions are less
                                 500 ppmv (dry      than or equal to 500
                                 basis).            ppm (dry basis). As
                                                    part of the
                                                    Notification of
                                                    Compliance Status,
                                                    you must certify
                                                    that your vent meets
                                                    the CO limit. You
                                                    are not required to
                                                    conduct another
                                                    performance test to
                                                    demonstrate initial
                                                    compliance. You have
                                                    already conducted a
                                                    performance
                                                    evaluation to
                                                    demonstrate initial
                                                    compliance with the
                                                    applicable
                                                    performance
                                                    specification. As
                                                    part of your
                                                    Notification of
                                                    Compliance Status,
                                                    you must certify
                                                    that your continuous
                                                    emission monitoring
                                                    system meets the
                                                    applicable
                                                    requirements in Sec.
                                                      63.1572. You are
                                                    not required to
                                                    conduct another
                                                    performance
                                                    evaluation to
                                                    demonstrate initial
                                                    compliance.
2. Not subject to the NSPS for  a. CO emissions    i. If you use a
 CO in 40 CFR 60.103             from your          continuous parameter
 60.102a(b)(4).                  catalyst           monitoring system,
                                 regenerator vent   the average CO
                                 or CO boiler       emissions measured
                                 serving the        by Method 10 over
                                 catalytic          the period of the
                                 cracking unit      initial performance
                                 must not exceed    test are less than
                                 500 ppmv (dry      or equal to 500 ppmv
                                 basis).            (dry basis).
                                                   ii. If you use a
                                                    continuous emission
                                                    monitoring system,
                                                    the hourly average
                                                    CO emissions over
                                                    the 24-hour period
                                                    for the initial
                                                    performance test are
                                                    not more than 500
                                                    ppmv (dry basis);
                                                    and your performance
                                                    evaluation shows
                                                    your continuous
                                                    emission monitoring
                                                    system meets the
                                                    applicable
                                                    requirements in Sec.
                                                      63.1572.
                                b. If you use a    On and after January
                                 flare, visible     30, 2019, the flare
                                 emissions must     meets the
                                 not exceed a       requirements of Sec.
                                 total of 5           63.670. Prior to
                                 minutes during     January 30, 2019,
                                 any 2 operating    visible emissions,
                                 hours.             measured by Method
                                                    22 during the 2-hour
                                                    observation period
                                                    during the initial
                                                    performance test,
                                                    are no higher than 5
                                                    minutes, or the
                                                    flare meets the
                                                    requirements of Sec.
                                                      63.670.
------------------------------------------------------------------------

0
64. Table 13 to subpart UUU of part 63 is revised to read as follows:
    As stated in Sec.  63.1565(c)(1), you shall meet each requirement
in the following table that applies to you.

    Table 13 to Subpart UUU of Part 63--Continuous Compliance With Organic HAP Emission Limits for Catalytic
                                                 Cracking Units
----------------------------------------------------------------------------------------------------------------
                                           Subject to this
 For each new and existing  catalytic  emission limit for your                            You shall demonstrate
         cracking unit . . .             catalyst regenerator      If you must . . .      continuous compliance
                                              vent . . .                                         by . . .
----------------------------------------------------------------------------------------------------------------
1. Subject to the NSPS for carbon      CO emissions from your   Continuous emission      Collecting the hourly
 monoxide (CO) in 40 CFR 60.103,        catalyst regenerator     monitoring system.       average CO monitoring
 60.100(e), or 60.102a(b)(4).           vent or CO boiler                                 data according to Sec.
                                        serving the catalytic                               63.1572; and
                                        cracking unit must not                            maintaining the hourly
                                        exceed 500 ppmv (dry                              average CO
                                        basis).                                           concentration at or
                                                                                below 500 ppmv (dry
                                                                                basis).
2. Not subject to the NSPS for CO in   a. CO emissions from     Continuous emission      Same as item 1.
 40 CFR 60.103 or 60.102a(b)(4).        your catalyst            monitoring system.
                                        regenerator vent or CO
                                        boiler serving the
                                        catalytic cracking
                                        unit must not exceed
                                        500 ppmv (dry basis).
                                       b. CO emissions from     Continuous parameter     Maintaining the hourly
                                        your catalyst            monitoring system.       average CO
                                        regenerator vent or CO                            concentration below
                                        boiler serving the                                500 ppmv (dry basis).
                                        catalytic cracking
                                        unit must not exceed
                                        500 ppmv (dry basis).
                                       c. Visible emissions     Control device-flare...  On and after January
                                        from a flare must not                             30, 2019, meeting the
                                        exceed a total of 5                               requirements of Sec.
                                        minutes during any 2-                             63.670. Prior to
                                        hour period.                                      January 30, 2019,
                                                                                maintaining visible
                                                                                emissions below a
                                                                                total of 5 minutes
                                                                                during any 2-hour
                                                                                operating period, or
                                                                                meeting the
                                                                                requirements of Sec.
                                                                                63.670.
----------------------------------------------------------------------------------------------------------------

0
65. Table 14 to subpart UUU of part 63 is revised to read as follows:
    As stated in Sec.  63.1565(c)(1), you shall meet each requirement
in the following table that applies to you.

 Table 14 to Subpart UUU of Part 63--Continuous Compliance With Operating Limits for Organic HAP Emissions From
                                            Catalytic Cracking Units
----------------------------------------------------------------------------------------------------------------
                                                                                You shall demonstrate
   For each new existing catalytic         If you use . . .        For this operating     continuous compliance
         cracking unit . . .                                          limit . . .                by . . .
----------------------------------------------------------------------------------------------------------------
1. Subject to NSPS for carbon          Continuous emission      Not applicable.........  Complying with Table 13
 monoxide (CO) in 40 CFR 60.103,        monitoring system.                                of this subpart, item
 60.100(e), 60.102a(b)(4).                                                                1.
2. Not subject to the NSPS for CO in   a. Continuous emission   Not applicable.........  Complying with Table 13
 40 CFR 60.103 or 60.102a(b)(4).        monitoring system.                                of this subpart, item
                                                                                2.a.
                                       b. Continuous parameter  i. The daily average     Collecting the hourly
                                        monitoring systems--     combustion zone          and daily average
                                        thermal incinerator.     temperature must not     temperature monitoring
                                                                 fall below the level     data according to Sec.
                                                                 established during the     63.1572; and
                                                                 performance test.        maintaining the daily
                                                                                average combustion
                                                                                zone temperature above
                                                                                the limit established
                                                                                during the performance
                                                                                test.
                                                                ii. The daily average    Collecting the hourly
                                                                 oxygen concentration     and daily average
                                                                 in the vent stream       oxygen concentration
                                                                 (percent, dry basis)     monitoring data
                                                                 must not fall below      according to Sec.
                                                                 the level established    63.1572; and
                                                                 during the performance   maintaining the daily
                                                                 test.                    average oxygen
                                                                                concentration above
                                                                                the limit established
                                                                                during the performance
                                                                                test.
                                       c. Continuous parameter  The daily combustion     Collecting the average
                                        monitoring systems--     zone temperature must    hourly and daily
                                        boiler or process        not fall below the       temperature monitoring
                                        heater with a design     level established in     data according to Sec.
                                        heat input capacity      the performance test.      63.1572; and
                                        under 44 MW or boiler                             maintaining the daily
                                        or process heater in                              average combustion
                                        which all vent streams                            zone temperature above
                                        are not introduced                                the limit established
                                        into the flame zone.                              during the performance
                                                                                test.

                                       d. Continuous parameter  The flare pilot light    On and after January
                                        monitoring system--      must be present at all   30, 2019, meeting the
                                        flare.                   times and the flare      requirements of Sec.
                                                                 must be operating at     63.670. Prior to
                                                                 all times that           January 30, 2019,
                                                                 emissions may be         collecting the flare
                                                                 vented to it.            monitoring data
                                                                                according to Sec.
                                                                                63.1572 and recording
                                                                                for each 1-hour period
                                                                                whether the monitor
                                                                                was continuously
                                                                                operating and the
                                                                                pilot light was
                                                                                continuously present
                                                                                during each 1-hour
                                                                                period, or meeting the
                                                                                requirements of Sec.
                                                                                63.670.
3. During periods of startup,          Any control device.....  The oxygen               Collecting the hourly
 shutdown or hot standby electing to                             concentration limit in   average oxygen
 comply with the operating limit in                              Sec.                     concentration
 Sec.   63.1565(a)(5)(ii).                                       63.1565(a)(5)(ii).       monitoring data
                                                                                according to Sec.
                                                                                63.1572 and
                                                                                maintaining the hourly
                                                                                average oxygen
                                                                                concentration at or
                                                                                above 1 volume percent
                                                                                (dry basis).
----------------------------------------------------------------------------------------------------------------

0
66. Table 15 to subpart UUU of part 63 is amended by revising the entry
for item 1 to read as follows:
* * * * *

   Table 15 to Subpart UUU of Part 63--Organic HAP Emission Limits for
                        Catalytic Reforming Units
------------------------------------------------------------------------
                                                     You shall meet this
                                                       emission limit
                                                       during initial
   For each applicable process vent for a new or          catalyst
     existing catalytic reforming  unit . . .         depressuring and
                                                      catalyst purging
                                                      operations . . .
------------------------------------------------------------------------
1. Option 1.......................................  On and after January
                                                     30, 2019, vent
                                                     emissions to a
                                                     flare that meets
                                                     the requirements of
                                                     Sec.   63.670.
                                                     Prior to January
                                                     30, 2019, vent
                                                     emissions to a
                                                     flare that meets
                                                     the requirements
                                                     for control devices
                                                     in Sec.   63.11(b)
                                                     and visible
                                                     emissions from a
                                                     flare must not
                                                     exceed a total of 5
                                                     minutes during any
                                                     2-hour operating
                                                     period, or vent
                                                     emissions to a
                                                     flare that meets
                                                     the requirements of
                                                     Sec.   63.670.

                              * * * * * * *
------------------------------------------------------------------------

0
67. Table 16 to subpart UUU of part 63 is amended by revising the entry
for item 1 to read as follows:
* * * * *

  Table 16 to Subpart UUU of Part 63--Operating Limits for Organic HAP
                Emissions From Catalytic Reforming Units
------------------------------------------------------------------------
                                                    You shall meet this
                                                      operating limit
   For each new or existing      For this type of      during initial
catalytic reforming unit . . .   control device .  catalyst depressuring
                                       . .              and purging
                                                      operations. . .
------------------------------------------------------------------------
1. Option 1: Vent to flare....  Flare............  On and after January
                                                    30, 2019, the flare
                                                    must meet the
                                                    requirements of Sec.
                                                      63.670. Prior to
                                                    January 30, 2019,
                                                    the flare pilot
                                                    light must be
                                                    present at all times
                                                    and the flare must
                                                    be operating at all
                                                    times that emissions
                                                    may be vented to it,
                                                    or the flare must
                                                    meet the
                                                    requirements of Sec.
                                                      63.670.

                              * * * * * * *
------------------------------------------------------------------------

0
68. Table 17 to subpart UUU of part 63 is amended by revising the entry
for item 1 to read as follows:
* * * * *

  Table 17 to Subpart UUU of Part 63--Continuous Monitoring Systems for
          Organic HAP Emissions From Catalytic Reforming Units
------------------------------------------------------------------------
                                                   You shall install and
  For each applicable process    If you use this    operate this type of
  vent for a new or existing     type of control   continuous monitoring
 catalytic  reforming unit . .     device . . .         system . . .
               .
------------------------------------------------------------------------
1. Option 1: Vent to a flare..  Flare............  On and after January
                                                    30, 2019, the
                                                    monitoring systems
                                                    required in Sec.
                                                    Sec.   63.670 and
                                                    63.671. Prior to
                                                    January 30, 2019,
                                                    monitoring device
                                                    such as a
                                                    thermocouple, an
                                                    ultraviolet beam
                                                    sensor, or infrared
                                                    sensor to
                                                    continuously detect
                                                    the presence of a
                                                    pilot flame, or the
                                                    monitoring systems
                                                    required in Sec.
                                                    Sec.   63.670 and
                                                    63.671.

                              * * * * * * *
------------------------------------------------------------------------

0
69. Table 18 to subpart UUU of part 63 is amended by revising the
column headings and the entry for item 1 to read as follows:
* * * * *

 Table 18 to Subpart UUU of Part 63--Requirements for Performance Tests for Organic HAP Emissions From Catalytic
                                                 Reforming Units
----------------------------------------------------------------------------------------------------------------
  For each new or existing catalytic                                                        According to these
         reforming unit . . .               You must . . .            Using . . .           requirements . . .
----------------------------------------------------------------------------------------------------------------
1. Option 1: Vent to a flare.........  a. Conduct visible       Method 22 (40 CFR part   On and after January
                                        emission observations.   60, appendix A-7).       30, 2019, the flare
                                                                                must meet the
                                                                                requirements of Sec.
                                                                                63.670. Prior to
                                                                                January 30, 2019, 2-
                                                                                hour observation
                                                                                period. Record the
                                                                                presence of a flame at
                                                                                the pilot light over
                                                                                the full period of the
                                                                                test, or the
                                                                                requirements of Sec.
                                                                                63.670.
                                       b. Determine that the    40 CFR 63.11(b)(6)       On and after January
                                        flare meets the          through (8).             30, 2019, the flare
                                        requirements for net                              must meet the
                                        heating value of the                              requirements of Sec.
                                        gas being combusted                               63.670. Prior to
                                        and exit velocity.                                January 30, 2019, the
                                                                                flare must meet the
                                                                                control device
                                                                                requirements in Sec.
                                                                                63.11(b) or the
                                                                                requirements of Sec.
                                                                                63.670.

                                                  * * * * * * *
----------------------------------------------------------------------------------------------------------------

0
70. Table 19 to subpart UUU of part 63 is amended by revising the entry
for item 1 to read as follows:
* * * * *

 Table 19 to Subpart UUU of Part 63--Initial Compliance With Organic HAP
              Emission Limits for Catalytic Reforming Units
------------------------------------------------------------------------
 For each applicable process
 vent for a new or existing     For the following         You have
catalytic reforming unit . .  emission limit . . .  demonstrated initial
              .                                     compliance  if . . .
------------------------------------------------------------------------
Option 1....................  Visible emissions     On and after January
                               from a flare must     30, 2019, the flare
                               not exceed a total    meets the
                               of 5 minutes during   requirements of
                               any 2 consecutive     Sec.   63.670.
                               hours.                Prior to January
                                                     30, 2019, visible
                                                     emissions, measured
                                                     using Method 22
                                                     over the 2-hour
                                                     observation period
                                                     of the performance
                                                     test, do not exceed
                                                     a total of 5
                                                     minutes, or the
                                                     flare meets the
                                                     requirements of
                                                     Sec.   63.670.

                              * * * * * * *
------------------------------------------------------------------------

0
71. Table 20 to subpart UUU of part 63 is amended by revising the entry
for item 1 to read as follows:
* * * * *

 Table 20 to Subpart UUU of Part 63--Continuous Compliance With Organic
            HAP Emission Limits for Catalytic Reforming Units
------------------------------------------------------------------------
                                                          You shall
                                                         demonstrate
 For each applicable process                             continuous
 vent for a new or existing     For this emission     compliance during
catalytic reforming unit . .       limit . . .        initial catalyst
              .                                       depressuring and
                                                      catalyst purging
                                                     operations by . . .
------------------------------------------------------------------------
1. Option 1.................  Vent emissions from   On and after January
                               your process vent     30, 2019, meeting
                               to a flare.           the requirements of
                                                     Sec.   63.670.
                                                     Prior to January
                                                     30, 2019,
                                                     maintaining visible
                                                     emissions from a
                                                     flare below a total
                                                     of 5 minutes during
                                                     any 2 consecutive
                                                     hours, or meeting
                                                     the requirements of
                                                     Sec.   63.670.

                              * * * * * * *
------------------------------------------------------------------------

0
72. Table 21 to subpart UUU of part 63 is amended by revising the entry
for item 1 to read as follows:
* * * * *

 Table 21 to Subpart UUU of Part 63--Continuous Compliance With Operating Limits for Organic HAP Emissions From
                                            Catalytic Reforming Units
----------------------------------------------------------------------------------------------------------------
                                                                                You shall demonstrate
                                                                                continuous compliance
 For each applicable process vent for                              For this operating    during initial catalyst
a new or existing catalytic reforming      If you use . . .           limit . . .            depressuring and
              unit . . .                                                                  purging  operations by
                                                                                . . .
----------------------------------------------------------------------------------------------------------------
1. Option 1..........................  Flare..................  The flare pilot light    On and after January
                                                                 must be present at all   30, 2019, meeting the
                                                                 times and the flare      requirements of Sec.
                                                                 must be operating at     63.670. Prior to
                                                                 all times that           January 30, 2019,
                                                                 emissions may be         collecting flare
                                                                 vented to it.            monitoring data
                                                                                according to Sec.
                                                                                63.1572 and recording
                                                                                for each 1-hour period
                                                                                whether the monitor
                                                                                was continuously
                                                                                operating and the
                                                                                pilot light was
                                                                                continuously present
                                                                                during each 1-hour
                                                                                period, or meeting the
                                                                                requirements of Sec.
                                                                                63.670.

                                                  * * * * * * *
----------------------------------------------------------------------------------------------------------------

0
73. Table 22 to subpart UUU of part 63 is amended by revising the
entries for items 2 and 3 to read as follows:
* * * * *

  Table 22 to Subpart UUU of Part 63--Inorganic HAP Emission Limits for
                        Catalytic Reforming Units
------------------------------------------------------------------------
                                           You shall meet this emission
                                            limit for each applicable
                                            catalytic  reforming unit
               For . . .                  process vent during coke burn-
                                          off and catalyst  rejuvenation
                                                      . . .
------------------------------------------------------------------------

                              * * * * * * *
2. Each existing cyclic or continuous    Reduce uncontrolled emissions
 catalytic reforming unit.                of HCl by 97 percent by weight
                                          or to a concentration of 10
                                          ppmv (dry basis), corrected to
                                          3 percent oxygen.
3. Each new semi-regenerative, cyclic,   Reduce uncontrolled emissions
 or continuous catalytic reforming unit.  of HCl by 97 percent by weight
                                          or to a concentration of 10
                                          ppmv (dry basis), corrected to
                                          3 percent oxygen.
------------------------------------------------------------------------

0
74. Table 24 to subpart UUU of part 63 is amended by revising the
entries for items 2 through 4 and footnote 2 to read as follows:
* * * * *

  Table 24 to Subpart UUU of Part 63--Continuous Monitoring Systems for
         Inorganic HAP Emissions From Catalytic Reforming Units
------------------------------------------------------------------------
                                          You shall install and operate
 If you use this type of control device      this type of continuous
          for your vent . . .                monitoring system . . .
------------------------------------------------------------------------

                              * * * * * * *
2. Internal scrubbing system or no       Colormetric tube sampling
 control device (e.g., hot regen          system to measure the HCl
 system) to meet HCl outlet               concentration in the catalyst
 concentration limit.                     regenerator exhaust gas during
                                          coke burn-off and catalyst
                                          rejuvenation. The colormetric
                                          tube sampling system must meet
                                          the requirements in Table 41
                                          of this subpart.
3. Internal scrubbing system to meet     Continuous parameter monitoring
 HCl percent reduction standard.          system to measure and record
                                          the gas flow rate entering or
                                          exiting the internal scrubbing
                                          system during coke burn-off
                                          and catalyst rejuvenation; and
                                          continuous parameter
                                          monitoring system to measure
                                          and record the total water (or
                                          scrubbing liquid) flow rate
                                          entering the internal
                                          scrubbing system during coke
                                          burn-off and catalyst
                                          rejuvenation; and continuous
                                          parameter monitoring system to
                                          measure and record the pH or
                                          alkalinity of the water (or
                                          scrubbing liquid) exiting the
                                          internal scrubbing system
                                          during coke burn-off and
                                          catalyst rejuvenation.\2\
4. Fixed-bed gas-solid adsorption        Continuous parameter monitoring
 system.                                  system to measure and record
                                          the temperature of the gas
                                          entering or exiting the
                                          adsorption system during coke
                                          burn-off and catalyst
                                          rejuvenation; and colormetric
                                          tube sampling system to
                                          measure the gaseous HCl
                                          concentration in the
                                          adsorption system exhaust and
                                          at a point within the
                                          absorbent bed not to exceed 90
                                          percent of the total length of
                                          the absorbent bed during coke
                                          burn-off and catalyst
                                          rejuvenation. The colormetric
                                          tube sampling system must meet
                                          the requirements in Table 41
                                          of this subpart.

                              * * * * * * *
------------------------------------------------------------------------
 * * * * * * *
\2\ If applicable, you can use the alternative in Sec.   63.1573(c)(1)
  instead of a continuous parameter monitoring system for pH of the
  water (or scrubbing liquid) or the alternative in Sec.   63.1573(c)(2)
  instead of a continuous parameter monitoring system for alkalinity of
  the water (or scrubbing liquid).

* * * * *
0
75. Table 25 to subpart UUU of part 63 is amended by revising the
entries for items 2.a and 4.a and footnote 1 to read as follows:
* * * * *

     Table 25 to Subpart UUU of Part 63--Requirements for Performance Tests for Inorganic HAP Emissions From
                                            Catalytic Reforming Units
----------------------------------------------------------------------------------------------------------------
 For each new and existing  catalytic                                                       According to these
     reforming unit  using . . .           You shall . . .            Using . . .           requirements . . .
----------------------------------------------------------------------------------------------------------------

                                                  * * * * * * *
2. Wet scrubber......................  a. Establish operating   i. Data from continuous  Measure and record the
                                        limit for pH level or    parameter monitoring     pH or alkalinity of
                                        alkalinity.              systems.                 the water (or
                                                                                scrubbing liquid)
                                                                                exiting scrubber every
                                                                                15 minutes during the
                                                                                entire period of the
                                                                                performance test.
                                                                                Determine and record
                                                                                the minimum hourly
                                                                                average pH or
                                                                                alkalinity level from
                                                                                the recorded values.
                                                                ii. Alternative pH       Measure and record the
                                                                 procedure in Sec.        pH of the water (or
                                                                 63.1573(b)(1).           scrubbing liquid)
                                                                                exiting the scrubber
                                                                                during coke burn-off
                                                                                and catalyst
                                                                                rejuvenation using pH
                                                                                strips at least three
                                                                                times during each test
                                                                                run. Determine and
                                                                                record the average pH
                                                                                level for each test
                                                                                run. Determine and
                                                                                record the minimum
                                                                                test run average pH
                                                                                level.

                                                                iii. Alternative         Measure and record the
                                                                 alkalinity method in     alkalinity of the
                                                                 Sec.   63.1573(c)(2).    water (or scrubbing
                                                                                liquid) exiting the
                                                                                scrubber during coke
                                                                                burn-off and catalyst
                                                                                rejuvenation using
                                                                                discrete titration at
                                                                                least three times
                                                                                during each test run.
                                                                                Determine and record
                                                                                the average alkalinity
                                                                                level for each test
                                                                                run. Determine and
                                                                                record the minimum
                                                                                test run average
                                                                                alkalinity level.

                                                  * * * * * * *
4. Internal scrubbing system meeting   a. Establish operating   i. Data from continuous  Measure and record the
 HCl percent reduction standard.        limit for pH level or    parameter monitoring     pH alkalinity of the
                                        alkalinity.              system.                  water (or scrubbing
                                                                                liquid) exiting the
                                                                                internal scrubbing
                                                                                system every 15
                                                                                minutes during the
                                                                                entire period of the
                                                                                performance test.
                                                                                Determine and record
                                                                                the minimum hourly
                                                                                average pH or
                                                                                alkalinity level from
                                                                                the recorded values.
                                                                ii. Alternative pH       Measure and in record
                                                                 method in Sec.           pH of the water (or
                                                                 63.1573(c)(1).           scrubbing liquid)
                                                                                exiting the internal
                                                                                scrubbing system
                                                                                during coke burn-off
                                                                                and catalyst