GWh.
                                       Cobalt (Co)............  3.0 lb/TBtu or 0.020 lb/
                                                                 GWh.
                                       Lead (Pb)..............  2.0 lb/TBtu or 0.030 lb/
                                                                 GWh.
                                       Manganese (Mn).........  5.0 lb/TBtu or 0.060 lb/
                                                                 GWh.
                                       Nickel (Ni)............  8.0 lb/TBtu or 0.080 lb/
                                                                 GWh.
                                       Selenium (Se)..........  2.0 lb/TBtu or 0.020 lb/
                                                                 GWh.
                                       Mercury (Hg)...........  0.050 lb/TBtu or         For Method 29, collect
                                                                 0.00070 lb/GWh.          a minimum of 4 dscm
                                                                                per run or for Method
                                                                                30B sample volume
                                                                                determination (8.2.4),
                                                                                the estimated Hg
                                                                                concentration should
                                                                                nominally be < \1/2\
                                                                                the standard.
                                       b. Hydrogen chloride     0.00030 lb/MMBtu or      For Method 26A, collect
                                        (HCl).                   0.0030 lb/MWh.           a minimum of 4 dscm
                                                                                per run.
                                       c. Hydrogen fluoride     0.00020 lb/MMBtu or      For Method 26A, collect
                                        (HF).                    0.0020 lb/MWh.           a minimum of 4 dscm
                                                                                per run.
----------------------------------------------------------------------------------------------------------------
5. Solid oil-derived fuel-fired unit.  a. Total particulate     0.20 lb/MMBtu or 2.0 lb/ Collect a minimum of 2
                                        matter (PM).             MWh.                     dscm per run.
                                       OR                       OR
                                       Total non-Hg HAP metals  0.000050 lb/MMBtu or     Collect a minimum of 2
                                                                 0.0010 lb/MWh.           dscm per run.
                                       OR                       OR
                                       Individual HAP metals:                            Collect a minimum of 4
                                                                                dscm per run.
                                       Antimony (Sb)..........  0.40 lb/TBtu or 0.0070
                                                                 lb/GWh.
                                       Arsenic (As)...........  0.40 lb/TBtu or 0.0040
                                                                 lb/GWh.
                                       Beryllium (Be).........  0.070 lb/TBtu or
                                                                 0.00070 lb/GWh.
                                       Cadmium (Cd)...........  0.40 lb/TBtu or 0.0040
                                                                 lb/GWh.
                                       Chromium (Cr)..........  2.0 lb/TBtu or 0.020 lb/
                                                                 GWh.
                                       Cobalt (Co)............  2.0 lb/TBtu or 0.020 lb/
                                                                 GWh.
                                       Lead (Pb)..............  11.0 lb/TBtu or 0.020
                                                                 lb/GWh.
                                       Manganese (Mn).........  3.0 lb/TBtu or 0.040 lb/
                                                                 GWh.
                                       Nickel (Ni)............  9.0 lb/TBtu or 0.090 lb/
                                                                 GWh.
                                       Selenium (Se)..........  2.0 lb/TBtu 0.020 lb/
                                                                 GWh.
                                       b. Hydrogen chloride     0.0050 lb/MMBtu or       For Method 26A, collect
                                        (HCl).                   0.080 lb/GWh.            a minimum of 1 dscm
                                                                                per run; for Method
                                                                                26, collect a minimum
                                                                                of 60 liters per run.
                                       OR
                                       Sulfur dioxide (SO2)     0.40 lb/MMBtu or 5.0 lb/ SO2 CEMS.
                                        \8\.                     MWh.
                                       c. Mercury (Hg)........  0.20 lb/TBtu or 0.0020   LEE Testing for 28-30
                                                                 lb/GWh.                  days with 10 days
                                                                                maximum per run or Hg
                                                                                CEMS or Sorbent trap
                                                                                monitoring system.
----------------------------------------------------------------------------------------------------------------
\5\ footnote.
\6\ footnote.
\7\ footnote.
\8\ The alternate sulfur dioxide limit may not be used if your EGU does not have some form of flue gas
  desulfurization system installed.

    As stated in Sec.  63.9991, you must comply with the following
applicable work practice standards:

      Table 3 to Subpart UUUUU of Part 63--Work Practice Standards
------------------------------------------------------------------------
                                                   You must meet the
             If your EGU is . . .                   following . . .
------------------------------------------------------------------------
1. An existing EGU...........................  Conduct a performance
                                                test of the EGU annually
                                                as specified in Sec.
                                                63.10005.
2. A new EGU.................................  Conduct a performance
                                                test of the EGU annually
                                                as specified in Sec.
                                                63.10005.
------------------------------------------------------------------------

     Table 4 to Subpart UUUUU of Part 63--Operating Limits for EGUs
------------------------------------------------------------------------
                                                  You must meet these
  If you demonstrate compliance using . . .      operating limits . . .
------------------------------------------------------------------------
1. Wet PM scrubber control...................  a. Maintain the pressure
                                                drop at or above the
                                                lowest 1-hour average
                                                pressure drop across the
                                                wet scrubber and the
                                                liquid flow rate at or
                                                above the lowest 1-hour
                                                average liquid flow rate
                                                measured during the most
                                                recent performance test
                                                demonstrating compliance
                                                with the PM emissions
                                                limitation.
2. Wet acid gas scrubbers....................  a. Maintain the pH at or
                                                above the lowest 1-hour
                                                average pressure drop
                                                across the wet scrubber
                                                and the liquid flow-rate
                                                at or above the lowest 1-
                                                hour average liquid flow
                                                rate measured during the
                                                most recent performance
                                                test demonstrating
                                                compliance with the HCl
                                                emissions limitation.
3. Fabric filter control.....................  a. Install and operate a
                                                bag leak detection
                                                system according to Sec.
                                                  63.10010 and operate
                                                the fabric filter such
                                                that the bag leak
                                                detection system does
                                                not initiate alarm mode
                                                more than 5 percent of
                                                the operating time
                                                during each 6-month
                                                period.
4. Electrostatic precipitator control........  a. This option is only
                                                for EGUs that operate
                                                additional wet control
                                                systems. Maintain the
                                                secondary power input of
                                                the electrostatic
                                                precipitator at or above
                                                the lowest 1-hour
                                                average secondary power
                                                measured during the most
                                                recent performance test
                                                demonstrating compliance
                                                with the PM emissions
                                                limitation.
5. Dry scrubber, DSI, or carbon injection      Maintain the sorbent or
 control.                                       carbon injection rate at
                                                or above the lowest 1-
                                                hour average sorbent
                                                flow rate measured
                                                during the most recent
                                                performance test
                                                demonstrating compliance
                                                with the Hg emissions
                                                limitation.
6. Fuel analysis.............................  Maintain the fuel type or
                                                fuel mixture such that
                                                the applicable emission
                                                rate calculated
                                                according to Sec.
                                                63.10011(d)(3), (4) and/
                                                or (5) is less than the
                                                applicable emission
                                                limits.
7. Performance testing.......................  For EGUs that demonstrate
                                                compliance with a
                                                performance test,
                                                maintain the operating
                                                load of each unit such
                                                that it does not exceed
                                                110 percent of the
                                                average operating load
                                                recorded during the most
                                                recent performance test.
8. PM CEMS...................................  Maintain the PM
                                                concentration (mg/dscm)
                                                at or below the highest
                                                1-hour average measured
                                                during the most recent
                                                performance test
                                                demonstrating compliance
                                                with the total PM
                                                emissions limitation.
------------------------------------------------------------------------

    As stated in Sec.  63.10007, you must comply with the following
requirements for performance testing for existing, new or reconstructed
affected sources: \9\
---------------------------------------------------------------------------

    \9\ For emissions calculations involving periods of startup or
shutdown, use procedures in Sec.  63.10005(l).

                   Table 5 to Subpart UUUUU of Part 63--Performance Stack Testing Requirements
----------------------------------------------------------------------------------------------------------------
  To conduct a performance test for
    the following pollutant . . .           Using . . .             You must . . .           Using . . .\10\
----------------------------------------------------------------------------------------------------------------
1. Particulate matter (PM)..........  Emissions Testing......  a. Select sampling ports  Method 1 at 40 CFR part
                                                                location and the number   60, Appendix A-1 of
                                                                of traverse points.       this chapter.
                                                               b. Determine velocity     Method 2, 2F, or 2G at
                                                                and volumetric flow-      40 CFR part 60,
                                                                rate of the stack gas.    Appendix A-1 or A-2 to
                                                                                part 60 of this
                                                                                chapter.
                                                               c. Determine oxygen and   Method 3A or 3B at 40
                                                                carbon dioxide            CFR part 60, Appendix
                                                                concentrations of the     A-2 to part 60 of this
                                                                stack gas.                chapter, or ANSI/ASME
                                                                                PTC 19.10-1981.
                                                               d. Measure the moisture   Method 4 at 40 CFR part
                                                                content of the stack      60, Appendix A-3 of
                                                                gas.                      this chapter.
                                                               e. Measure the PM         Method 202 at 40 CFR
                                                                emissions                 part 51, Appendix M of
                                                                concentrations and        this chapter for
                                                                determine the             condensable PM
                                                                filterable and            emissions from units
                                                                condensable fractions,    and Method 5 (positive
                                                                as well as total PM.      pressure fabric
                                                                                filters must use
                                                                                Method 5D) at 40 CFR
                                                                                part 60, Appendix A-3
                                                                                or A-6 of this chapter
                                                                                for filterable PM
                                                                                emissions. Note that
                                                                                the Method 5 front
                                                                                half temperature shall
                                                                                be 320 [deg]F  25 [deg]F.
                                                               f. Convert emissions      Method 19 F-factor
                                                                concentration to lb per   methodology at 40 CFR
                                                                MMBtu emissions rates     part 60, Appendix A-7
                                                                or lb/MWh emissions       of this chapter, or
                                                                rates.                    calculate using mass
                                                                                emissions rate and
                                                                                electrical output
                                                                                data.
----------------------------------------------------------------------------------------------------------------
2. Total or individual non-Hg HAP     Emissions Testing......  a. Select sampling ports  Method 1 at 40 CFR part
 metals.                                                        location and the number   60, Appendix A-1 of
                                                                of traverse points.       this chapter.

                                                               b. Determine velocity     Method 2, 2F, or 2G at
                                                                and volumetric flow-      40 CFR part 60,
                                                                rate of the stack gas.    Appendix A-1 or A-2 to
                                                                                part 60 of this
                                                                                chapter.
                                                               c. Determine oxygen and   Method 3A or 3B at 40
                                                                carbon dioxide            CFR part 60, Appendix
                                                                concentrations of the     A-2 to part 60 of this
                                                                stack gas.                chapter, or ANSI/ASME
                                                                                PTC 19.10-1981.
                                                               d. Measure the moisture   Method 4 at 40 CFR part
                                                                content of the stack      60, Appendix A-3 of
                                                                gas.                      this chapter.
                                                               e. Measure the HAP        Method 29 at 40 CFR
                                                                metals emissions          part 60, Appendix A-8
                                                                concentrations and        of this chapter.
                                                                determine each            Determine total
                                                                individual HAP metals     filterable HAP metals
                                                                emissions                 according to section
                                                                concentration, as well    <IP_ADDRESS> prior to
                                                                as the total filterable   beginning metals
                                                                HAP metals emissions      analyses.
                                                                concentration and total
                                                                HAP metals emissions
                                                                concentration.
                                                               f. Convert emissions      Method 19 F-factor
                                                                concentrations            methodology at 40 CFR
                                                                (individual HAP metals,   part 60, Appendix A-7
                                                                total filterable HAP      of this chapter, or
                                                                metals, and total HAP     calculate using mass
                                                                metals) to lb per MMBtu   emissions rate and
                                                                or lb per MWh emissions   electrical output
                                                                rates.                    data.
----------------------------------------------------------------------------------------------------------------
3. Hydrogen chloride (HCl) and        Emissions Testing......  a. Select sampling ports  Method 1 at 40 CFR part
 hydrogen fluoride (HF).                                        location and the number   60, Appendix A-1 of
                                                                of traverse points.       this chapter.
                                                               b. Determine velocity     Method 2, 2F, or 2G at
                                                                and volumetric flow-      40 CFR part 60,
                                                                rate of the stack gas.    Appendix A-2 of this
                                                                                chapter.
                                                               c. Determine oxygen and   Method 3A or 3B at 40
                                                                carbon dioxide            CFR part 60, Appendix
                                                                concentrations of the     A-2 of this chapter,
                                                                stack gas.                or ANSI/ASME PTC 19.10-
                                                                                1981.
                                                               d. Measure the moisture   Method 4 at 40 CFR part
                                                                content of the stack      60, Appendix A-3 of
                                                                gas.                      this chapter.
                                                               e. Measure the HCl and    Method 26 if there are
                                                                HF emissions              no entrained water
                                                                concentrations.           droplets in the
                                                                                exhaust stream or 26A
                                                                                if there are entrained
                                                                                water droplets in the
                                                                                exhaust stream at 40
                                                                                CFR part 60, Appendix
                                                                                A-8 of this chapter.
                                                               f. Convert emissions      Method 19 F-factor
                                                                concentration to lb per   methodology at 40 CFR
                                                                MMBtu or lb per MWh       part 60, Appendix A-7
                                                                emissions rates.          of this chapter, or
                                                                                calculate using mass
                                                                                emissions rate and
                                                                                electrical output
                                                                                data.
                                      OR                       OR                        .......................
                                      HCl and/or HF CEMS.....  a. Install, operate, and  PS 15 or 6 at 40 CFR
                                                                maintain the CEMS.        part 60, Appendix B of
                                                                                this chapter and QA
                                                                                Procedure 1 at 40 CFR
                                                                                part 60, Appendix F of
                                                                                this chapter.
                                                               b. Install, operate, and  Section 4.1.3 and 5.3
                                                                maintain the diluents     of Appendix A of this
                                                                gas, flow rate, and/or    subpart.
                                                                moisture monitoring
                                                                systems.
                                                               c. Convert hourly         Method 19 F-factor
                                                                emissions                 methodology at 40 CFR
                                                                concentrations to 30      part 60, Appendix A-7
                                                                boiler operating day      of this chapter, or
                                                                rolling average lb per    calculate using mass
                                                                MMBtu emissions rates     emissions rate and
                                                                or lb/MWh emissions       electrical output
                                                                rates.                    data.
----------------------------------------------------------------------------------------------------------------
4. Mercury (Hg).....................  Emissions Testing......  a. Select sampling ports  Method 1 at 40 CFR part
                                                                location and the number   60, Appendix A-1 of
                                                                of traverse points.       this chapter.
                                                               b. Determine velocity     Method 2, 2F, or 2G at
                                                                and volumetric flow-      40 CFR part 60,
                                                                rate of the stack gas.    Appendix A-1 or A-2 of
                                                                                this chapter.
                                                               c. Determine oxygen and   Method 3A or 3B at 40
                                                                carbon dioxide            CFR part 60, Appendix
                                                                concentrations of the     A-1 of this chapter,
                                                                stack gas.                or ANSI/ASME PTC 19.10-
                                                                                1981.
                                                               d. Measure the moisture   Method 4 at 40 CFR part
                                                                content of the stack      60, Appendix A-3 of
                                                                gas.                      this chapter.
                                                               e. Measure the Hg         Method 29 or 30B at 40
                                                                emission concentration.   CFR part 60, Appendix
                                                                                A-8 of this chapter or
                                                                                ASTM Method D6784-02
                                                                                (2008) as specified.
                                                               f. Convert emissions      Section 6 of Appendix A
                                                                concentration to lb per   of this subpart.
                                                                TBtu emissions rates.
                                      OR                       OR                        .......................
                                      Hg CEMS................  a. Install, operate, and  Sections 3.2.1 and 5.1
                                                                maintain the CEMS.        of Appendix A of this
                                                                                subpart.
                                                               b. Install, operate, and  Section 4.1.3 and 5.3
                                                                maintain the diluents     of Appendix A of this
                                                                gas, flow rate, and/or    subpart.
                                                                moisture monitoring
                                                                systems.

                                                               c. Convert hourly         Section 6 of Appendix A
                                                                emissions                 of this subpart.
                                                                concentrations to 30
                                                                boiler operating day
                                                                rolling average lb per
                                                                MMBtu emissions rates
                                                                or lb/MWh emissions
                                                                rates.
                                      OR                       OR                        .......................
                                      Sorbent trap monitoring  a. Install, operate, and  Sections 3.2.2 and 5.2
                                       system                   maintain the sorbent      of Appendix A of this
                                                                trap monitoring system.   subpart.
                                                               b. Install, operate, and  Section 4.1.3 and 5.3
                                                                maintain the diluents     of Appendix A of this
                                                                gas, flow rate, and/or    subpart.
                                                                moisture monitoring
                                                                systems.
                                                               c. Convert emissions      Section 6 of Appendix A
                                                                concentrations to 30      of this subpart.
                                                                boiler operating day
                                                                rolling average lb per
                                                                MMBtu emissions rates
                                                                or lb/MWh emissions
                                                                rates.
                                      OR                       OR                        .......................
                                      LEE testing              a. Select sampling ports  Single point located at
                                                                location and the number   the 10% centroidal
                                                                of traverse points.       area of the duct at a
                                                                                port location per
                                                                                Method 1 at 40 CFR
                                                                                part 60, Appendix A-1
                                                                                of this chapter.
                                                               b. Determine velocity     Method 2, 2F, or 2G at
                                                                and volumetric flow-      40 CFR part 60,
                                                                rate of the stack gas.    Appendix A-1 or A-2 of
                                                                                this chapter or flow
                                                                                monitoring systems
                                                                                certified by Section
                                                                                4.1.3 and 5.3 of
                                                                                Appendix A of this
                                                                                subpart.
                                                               c. Determine oxygen and   Method 3A or 3B at 40
                                                                carbon dioxide            CFR part 60, Appendix
                                                                concentrations of the     A-1 of this chapter,
                                                                stack gas.                or ANSI/ASME PTC 19.10-
                                                                                1981 or diluent gas
                                                                                monitoring systems
                                                                                certified by Section
                                                                                4.1.3 and 5.3 of
                                                                                Appendix A of this
                                                                                subpart.
                                                               d. Measure the moisture   Method 4 at 40 CFR part
                                                                content of the stack      60, Appendix A-3 of
                                                                gas.                      this chapter or
                                                                                moisture monitoring
                                                                                systems certified by
                                                                                Section 4.1.3 and 5.3
                                                                                of Appendix A of this
                                                                                subpart.
                                                               e. Measure the Hg         Method 30B at 40 CFR
                                                                emission concentration.   part 60, Appendix A-8
                                                                                of this chapter.
                                                               f. Convert emissions      Section 6 of Appendix A
                                                                concentrations to 30      of this subpart.
                                                                boiler operating day
                                                                rolling average lb per
                                                                MMBtu emissions rates
                                                                or lb/MWh emissions
                                                                rates.
                                                               g. Convert 30 boiler      Potential maximum
                                                                operating day rolling     annual heat input in
                                                                average lb per MMBtu pr   MMBtu or potential
                                                                lb/MWh to lb per year.    maximum electricity
                                                                                generated in MWh.
----------------------------------------------------------------------------------------------------------------
5. Sulfur dioxide (SO2).............  SO2 CEMS...............  a. Install, operate, and  PS 2 or 6 at 40 CFR
                                                                maintain the CEMS.        part 60, Appendix B of
                                                                                this chapter and QA
                                                                                Procedure 1 at 40 CFR
                                                                                part 60, Appendix F of
                                                                                this chapter.
                                                               b. Install, operate, and  Section 4.1.3 and 5.3
                                                                maintain the diluents     of Appendix A of this
                                                                gas, flow rate, and/or    subpart.
                                                                moisture monitoring
                                                                systems.
                                                               c. Convert hourly         Method 19 F-factor
                                                                emissions                 methodology at 40 CFR
                                                                concentrations to 30      part 60, Appendix A-7
                                                                boiler operating day      of this chapter, or
                                                                rolling average lb per    calculate using mass
                                                                MMBtu emissions rates     emissions rate and
                                                                or lb/MWh emissions       electrical output
                                                                rates.                    data.
----------------------------------------------------------------------------------------------------------------

    As stated in Sec.  63.10008, you must comply with the following
requirements for fuel analysis testing for existing, new, or
reconstructed affected sources. However, equivalent methods may be used
in lieu of the prescribed methods at the discretion of the source owner
or operator:
---------------------------------------------------------------------------

    \10\ All ASTM, ANSI, and ASME methods are incorporated by
reference.
    \11\ All ASTM, ANSI, and ASME methods are incorporated by
reference.

     Table 6 to Subpart UUUUU of Part 63--Fuel Analysis Requirements
------------------------------------------------------------------------
To conduct a fuel analysis for
 the following pollutant . . .    You must . . .      Using . . . \11\

------------------------------------------------------------------------
1. Mercury (Hg)...............  a. Collect fuel    Procedure in Sec.
                                 samples.           63.10008(c) or ASTM
                                                    D2234/D2234M (for
                                                    coal) or equivalent.
                                b. Composite fuel  Procedure in Sec.
                                 samples.           63.10008(d) or
                                                    equivalent.

                                c. Prepare         EPA SW-846-3020A (for
                                 composited fuel    liquid samples) or
                                 samples.           ASTM D2013/D2013M-
                                                    (for coal) or
                                                    equivalent.
                                d. Determine heat  ASTM D5865 (for coal)
                                 content of the     or equivalent.
                                 fuel type.
                                e. Determine       ASTM D3173 or
                                 moisture content   equivalent.
                                 of the fuel type.
                                f. Measure Hg      ASTM D6722-01 (for
                                 concentration in   coal) or SW-846-
                                 fuel sample.       7471A (for solid
                                                    samples) or SW-846-
                                                    7470A (for liquid
                                                    samples) or
                                                    equivalent.
                                g. Convert         Method 19 F-factor
                                 concentration      methodology at 40
                                 into units of      CFR part 60,
                                 pounds of          Appendix A-7 of this
                                 pollutant per      chapter, or
                                 TBtu of heat       calculate using mass
                                 content or lb      emissions rate and
                                 per MWh.           electrical output
                                                    data.
------------------------------------------------------------------------
2. Other non-Hg HAP metals....  a. Collect fuel    Procedure in Sec.
                                 samples.           63.10008(c) or ASTM
                                                    D2234/D2234M (for
                                                    coal) or equivalent.
                                b. Composite fuel  Procedure in Sec.
                                 samples.           63.10008(d) or
                                                    equivalent.
                                c. Prepare         EPA SW-846-3020A (for
                                 composited fuel    liquid samples) or
                                 samples.           ASTM D2013/D2013M-
                                                    (for coal) or
                                                    equivalent.
                                d. Determine heat  ASTM D5865 (for coal)
                                 content of the     or equivalent.
                                 fuel type.
                                e. Determine       ASTM D3173 or
                                 moisture content   equivalent.
                                 of the fuel type.
                                f. Measure other   EPA SW-846-6010B or
                                 non-Hg HAP         ASTM D3683 (for coal
                                 metals             samples) or
                                 concentrations     equivalent; EPA SW-
                                 in fuel sample.    846-6010B (for other
                                                    solid fuel samples)
                                                    or equivalent; or
                                                    EPA SW-846-6020 (for
                                                    liquid fuel samples)
                                                    or equivalent.
                                g. Convert         Method 19 F-factor
                                 concentration      methodology at 40
                                 into units of      CFR part 60,
                                 pounds of          Appendix A-7 of this
                                 pollutant per      chapter, or
                                 TBtu of heat       calculate using mass
                                 content or lb      emissions rate and
                                 per MWh.           electrical output
                                                    data.
                                b. Composite fuel  Procedure in Sec.
                                 samples.           63.10008(d) or
                                                    equivalent.
------------------------------------------------------------------------
3. Hydrogen chloride (HCl)....  a. Collect fuel    Procedure in Sec.
                                 samples.           63.10008(c) or D2234/
                                                    D2234M (for coal) or
                                                    equivalent.
                                b. Composite fuel  Procedure in Sec.
                                 samples.           63.10008(d) or
                                                    equivalent.
                                c. Prepare         EPA SW-846-3020A (for
                                 composited fuel    liquid samples), EPA
                                 samples.           SW-846-3050B (for
                                                    solid samples), or
                                                    ASTM D2013/D2013M
                                                    (for coal) or
                                                    equivalent.
                                d. Determine heat  ASTM D5865 (for coal)
                                 content of the     or equivalent.
                                 fuel type.
                                e. Determine       ASTM D3173 or
                                 moisture content   equivalent.
                                 of the fuel type.
                                f. Measure         EPA SW-846-9250 or
                                 chlorine           ASTM D6721 (for
                                 concentration in   coal) or equivalent,
                                 fuel sample.       or EPA SW-846-9250
                                                    or ASTM E776 (for
                                                    solid or liquid
                                                    samples) or
                                                    equivalent.
                                g. Convert         Method 19 F-factor
                                 concentrations     methodology at 40
                                 into units of      CFR part 60,
                                 pounds of          Appendix A-7 of this
                                 pollutant per      chapter, or
                                 MMBtu of heat      calculate using mass
                                 content or lb      emissions rate and
                                 per MWh.           electrical output
                                                    data.
------------------------------------------------------------------------
4. Hydrogen fluoride (HF).....  a. Collect fuel    Procedure in Sec.
                                 samples.           63.10008(c) or D2234/
                                                    D2234M (for coal) or
                                                    equivalent.
                                b. Composite fuel  Procedure in Sec.
                                 samples.           63.10008(d) or
                                                    equivalent.
                                c. Prepare         EPA SW-846-3020A (for
                                 composited fuel    liquid samples), EPA
                                 samples.           SW-846-3050B (for
                                                    solid samples), or
                                                    ASTM D2013/D2013M
                                                    (for coal) or
                                                    equivalent.
                                d. Determine heat  ASTM D5865 (for coal)
                                 content of the     or equivalent.
                                 fuel type.
                                e. Determine       ASTM D3173 or
                                 moisture content   equivalent.
                                 of the fuel type.
                                f. Measure         EPA SW-846-9250 or
                                 chlorine           ASTM D6721 (for
                                 concentration in   coal) or equivalent,
                                 fuel sample.       or EPA SW-846-9250
                                                    or ASTM E776 (for
                                                    solid or liquid
                                                    samples) or
                                                    equivalent.
                                g. Convert         Method 19 F-factor
                                 concentrations     methodology at 40
                                 into units of      CFR part 60,
                                 pounds of          Appendix A-7 of this
                                 pollutant per      chapter.
                                 MMBtu of heat
                                 content.
------------------------------------------------------------------------

    As stated in Sec.  63.10007, you must comply with the following
requirements for establishing operating limits:

                       Table 7 to Subpart UUUUU of Part 63--Establishing Operating Limits
----------------------------------------------------------------------------------------------------------------
                                  And your operating                                           According to the
    If you have an applicable      limits are based     You must . . .        Using . . .          following
    emission limit for . . .           on . . .                                                  requirements
----------------------------------------------------------------------------------------------------------------
1. Particulate matter (PM),       a. Wet scrubber     i. Establish a      (1) Data from the   (a) You must
 mercury (Hg), or other non-Hg     operating           site-specific       pressure drop and   collect pressure
 HAP metals.                       parameters.         minimum pressure    liquid flow rate    drop and liquid
                                                       drop and minimum    monitors and the    flow-rate data
                                                       flow rate           PM, Hg, or other    every 15 minutes
                                                       operating limit     non-Hg HAP metals   during the entire
                                                       according to Sec.   performance test.   period of the
                                                         63.10011(c).                          performance
                                                                                tests;
                                                                                (b) Determine the
                                                                                average hourly
                                                                                pressure drops
                                                                                and liquid flow
                                                                                rates for each
                                                                                individual test
                                                                                run in the three-
                                                                                run performance
                                                                                test by computing
                                                                                the average of
                                                                                all the 15-minute
                                                                                readings taken
                                                                                during each test
                                                                                run.
                                  b. Electrostatic    i. Establish a      (1) Data from the   (a) You must
                                   precipitator        site-specific       secondary power     collect secondary
                                   operating           secondary power     input during the    voltage and
                                   parameters          input according     PM, Hg, or other    current and
                                   (option only for    to Sec.             non-Hg HAP metals   calculate total
                                   units that          63.10011(c).        performance test.   ESP secondary
                                   operate wet                                                 power input data
                                   scrubbers).                                                 every 15 minutes
                                                                                during the entire
                                                                                period of the
                                                                                performance
                                                                                tests;
                                                                                (b) Determine the
                                                                                average hourly
                                                                                total secondary
                                                                                power inputs for
                                                                                each individual
                                                                                test run in the
                                                                                three-run
                                                                                performance test
                                                                                by computing the
                                                                                average of all
                                                                                the 15-minute
                                                                                readings taken
                                                                                during each test
                                                                                run.
                                  c. Filterable PM    i. Establish a      (1) Data from the   (a) You must
                                   results obtained    site-specific       PM performance      collect at least
                                   from performance    filterable PM       test.               3 test runs of
                                   testing and are     concentration                           Method 5
                                   measured            according to Sec.                       filterable PM
                                   continuously          63.10011(d).                          results.
                                   using PM CEMS.
----------------------------------------------------------------------------------------------------------------
2. Hydrogen chloride (HCl) or     a. Wet scrubber     i. Establish a      (1) Data from the   (a) You must
 hydrogen fluoride (HF).           operating           site-specific       pH and liquid       collect pH and
                                   parameters.         minimum pH and      flow rate           liquid flow rate
                                                       flow rate           monitors and the    data every 15
                                                       operating limits    HCl performance     minutes during
                                                       according to Sec.   test.               the entire period
                                                         63.10011(c).                          of the
                                                                                performance
                                                                                tests;
                                                                                (b) Determine the
                                                                                average hourly pH
                                                                                liquid flow rates
                                                                                for each
                                                                                individual test
                                                                                run in the three-
                                                                                run performance
                                                                                test by computing
                                                                                the average of
                                                                                all the 15-minute
                                                                                readings taken
                                                                                during each test
                                                                                run.
                                  b. Dry scrubber or  i. Establish a      (1) Data from the   (a) You must
                                   DSI operating       site-specific       sorbent injection   collect sorbent
                                   parameters.         minimum sorbent     rate monitors and   injection rate
                                                       injection rate      HCl or Hg           data every 15
                                                       operating limit     performance test.   minutes during
                                                       according to Sec.                       the entire period
                                                         63.10011(c). If                       of the
                                                       different acid                          performance
                                                       gas sorbents are                        tests;
                                                       used during the                        (b) Determine the
                                                       HCl performance                         average hourly
                                                       test, the average                       sorbent injection
                                                       value for each                          rates of the
                                                       sorbent becomes                         three test run
                                                       the site-specific                       averages measured
                                                       operating limit                         during the
                                                       for that sorbent.                       performance test.
----------------------------------------------------------------------------------------------------------------

    As stated in Sec.  63.10021, you must show continuous compliance
with the emission limitations for affected sources according to the
following:

Table 8 to Subpart UUUUU of Part 63--Demonstrating Continuous Compliance
------------------------------------------------------------------------
     If you must meet the
following operating limits or       You must demonstrate continuous
work practice standards . . .             compliance by . . .
------------------------------------------------------------------------
1. Fabric filter bag leak      Installing and operating a bag leak
 detection operation.           detection system according to Sec.
                                63.10010 and operating the fabric filter
                                such that the requirements in Sec.
                                63.10021(a)(9) are met.
2. Wet PM scrubber pressure    a. Collecting the pressure drop and
 drop and liquid flow-rate.     liquid flow rate monitoring system data
                                according to Sec.  Sec.   63.10010 and
                                63.10020; and
                               b. Reducing the data to 12-hour block
                                averages; and
                               c. Maintaining the 12-hour average
                                pressure drop and liquid flow-rate at or
                                above the operating limits established
                                during the performance test according to
                                Sec.   63.10011(c).
3. Wet acid gas scrubber pH    a. Collecting the pH and liquid flow rate
 and liquid flow rate.          monitoring system data according to Sec.
                                 Sec.   63.10010 and 63.10020; and
                               b. Reducing the data to 12-hour block
                                averages; and
                               c. Maintaining the 12-hour average pH and
                                liquid flow-rate at or above the
                                operating limits established during the
                                performance test according to Sec.
                                63.10011(c).
4. Dry scrubber or DSI         a. Collecting the sorbent or carbon
 sorbent or carbon injection    injection rate monitoring system data
 rate.                          for the dry scrubber or DSI according to
                                Sec.  Sec.   63.10010 and 63.10020; and
                               b. Reducing the data to 12-hour block
                                averages; and
                               c. Maintaining the 12-hour average
                                sorbent or carbon injection rate at or
                                above the operating limit established
                                during the performance test according to
                                Sec.   63.10011(c).
5. Electrostatic precipitator  a. Collecting the secondary power input
 secondary power input.         monitoring system data for the
                                electrostatic precipitator according to
                                Sec.  Sec.   63.10010 and 63.10020; and
                               b. Reducing the data to 12-hour block
                                averages; and
                               c. Maintaining the 12-hour average
                                secondary power input at or above the
                                operating limits established during the
                                performance test according to Sec.
                                63.10011(c).
6. Fuel pollutant content....  a. Only burning the fuel types and fuel
                                mixtures used to demonstrate compliance
                                with the applicable emission limit
                                according to Sec.   63.10011(c) or (d)
                                as applicable; and
                               b. Keeping monthly records of fuel use
                                according to Sec.   63.10021(a).
7. Filterable PM as measured   a. Collecting the PM concentration data
 by PM CEMS.                    using a PM CEMS installed, operated and
                                maintained in accordance with PS 11 at
                                40 CFR part 60, Appendix B of this
                                chapter and QA Procedure 5 at 40 CFR
                                part 60, Appendix F of this chapter;
                               b. Converting hourly emissions
                                concentrations to 30 boiler operating mg/
                                dscm values; and
                               c. Maintaining the 30 boiler operating
                                day rolling average mg/dscm values below
                                the operating limits established during
                                the performance test according to Sec.
                                63.10011(d).
------------------------------------------------------------------------

    As stated in Sec.  63.10031, you must comply with the following
requirements for reports:

       Table 9 to Subpart UUUUU of Part 63--Reporting Requirements
------------------------------------------------------------------------
                                    The report must      You must submit
     You must submit a(n)            contain . . .      the report . . .
------------------------------------------------------------------------
1. Compliance report..........  a. Information          Semiannually
                                 required in Sec.        according to
                                 63.10031(c)(1)          the
                                 through (11) through    requirements in
                                 (11); and               Sec.
                                                         63.10031(b).
                                b. If there are no
                                 deviations from any
                                 emission limitation
                                 (emission limit and
                                 operating limit) that
                                 applies to you and
                                 there are no
                                 deviations from the
                                 requirements for work
                                 practice standards in
                                 Table 8 to this
                                 subpart that apply to
                                 you, a statement that
                                 there were no
                                 deviations from the
                                 emission limitations
                                 and work practice
                                 standards during the
                                 reporting period. If
                                 there were no periods
                                 during which the
                                 CMSs, including
                                 continuous emissions
                                 monitoring system,
                                 and operating
                                 parameter monitoring
                                 systems, were out-of-
                                 control as specified
                                 in Sec.   63.8(c)(7),
                                 a statement that
                                 there were no periods
                                 during which the CMSs
                                 were out-of-control
                                 during the reporting
                                 period; and
                                c. If you have a
                                 deviation from any
                                 emission limitation
                                 (emission limit and
                                 operating limit) or
                                 work practice
                                 standard during the
                                 reporting period, the
                                 report must contain
                                 the information in
                                 Sec.   63.10031(d).
                                 If there were periods
                                 during which the
                                 CMSs, including
                                 continuous emissions
                                 monitoring system,
                                 and operating
                                 parameter monitoring
                                 systems, were out-of-
                                 control, as specified
                                 in Sec.   63.8(c)(7),
                                 the report must
                                 contain the
                                 information in Sec.
                                 63.10031(e); and
                                d. If you had a
                                 startup, shutdown, or
                                 malfunction during
                                 the reporting period
                                 and you took actions
                                 consistent with your
                                 startup, shutdown,
                                 and malfunction plan,
                                 the compliance report
                                 must include the
                                 information in Sec.
                                 63.10(d)(5)(i).

2. An immediate startup,        a. Actions taken for    i. By fax or
 shutdown, and malfunction       the event; and.         telephone
 report if you had a startup,                            within 2
 shutdown, or malfunction                                working days
 during the reporting period                             after starting
 that is not consistent with                             actions
 your startup, shutdown, and                             inconsistent
 malfunction plan, and the                               with the plan;
 source exceeds any applicable                           and
 emission limitation in the
 emission standard.
                                b. The information in   ii. By letter
                                 Sec.                    within 7
                                 63.10(d)(5)(ii).        working days
                                                         after the end
                                                         of the event
                                                         unless you have
                                                         made
                                                         alternative
                                                         arrangements
                                                         with the
                                                         permitting
                                                         authority.
------------------------------------------------------------------------

    As stated in Sec.  63.10040, you must comply with the applicable
General Provisions according to the following:

     Table 10 to Subpart UUUUU of Part 63--Applicability of General
                       Provisions to Subpart UUUUU
------------------------------------------------------------------------
                                                      Applies to subpart
            Citation                    Subject              UUUUU
------------------------------------------------------------------------
Sec.   63.1.....................  Applicability.....  Yes.
Sec.   63.2.....................  Definitions.......  Yes. Additional
                                                       terms defined in
                                                       Sec.   63.10042.
Sec.   63.3.....................  Units and           Yes.
                                   Abbreviations.
Sec.   63.4.....................  Prohibited          Yes.
                                   Activities and
                                   Circumvention.
Sec.   63.5.....................  Preconstruction     Yes.
                                   Review and
                                   Notification
                                   Requirements.
Sec.   63.6(a), (b)(1)-(b)(5),    Compliance with     Yes.
 (b)(7), (c), (f)(2)-(3), (g),     Standards and
 (h)(2)-(h)(9), (i), (j).          Maintenance
                                   Requirements.
Sec.   63.6(e)(1)(i)............  General Duty to     No. See Sec.
                                   minimize            63.10000(b) for
                                   emissions.          general duty
                                                       requirement.
Sec.   63.6(e)(1)(ii)...........  Requirement to      No.
                                   correct
                                   malfunctions ASAP.
Sec.   63.6(e)(3)...............  SSM Plan            No.
                                   requirements.
Sec.   63.6(f)(1)...............  SSM exemption.....  No.
Sec.   63.6(h)(1)...............  SSM exemption.....  No.
Sec.   63.7(a), (b), (c), (d),    Performance         Yes.
 (e)(2)-(e)(9), (f), (g), and      Testing
 (h).                              Requirements.
Sec.   63.7(e)(1)...............  Performance         No. See Sec.
                                   testing.            63.10007.
Sec.   63.8.....................  Monitoring          ..................
                                   Requirements.
63.8(c)(1)(i)...................  General duty to     ..................
                                   minimize
                                   emissions and CMS
                                   operation.
Sec.   63.8(c)(1)(iii)..........  Requirement to      No.
                                   develop SSM Plan
                                   for CMS.
Sec.   63.8(d)(3)...............  Written procedures  Yes, except for
                                   for CMS.            last sentence,
                                                       which refers to
                                                       an SSM plan. SSM
                                                       plans are not
                                                       required.
Sec.   63.9.....................  Notification        Yes.
                                   Requirements.
Sec.   63.10(a), (b)(1), (c),     Recordkeeping and   Yes.
 (d)(1)-(2), (e), and (f).         Reporting
                                   Requirements.
Sec.   63.10(b)(2)(i)...........  Recordkeeping of    No.
                                   occurrence and
                                   duration of
                                   startups and
                                   shutdowns.
Sec.   63.10(b)(2)(ii)..........  Recordkeeping of    No. See 63.10001
                                   malfunctions.       for recordkeeping
                                                       of (1) occurrence
                                                       and duration and
                                                       (2) actions taken
                                                       during
                                                       malfunction.
Sec.   63.10(b)(2)(iii).........  Maintenance         Yes.
                                   records.
Sec.   63.10(b)(2)(iv)..........  Actions taken to    No.
                                   minimize
                                   emissions during
                                   SSM.
Sec.   63.10(b)(2)(v)...........  Actions taken to    No.
                                   minimize
                                   emissions during
                                   SSM.
Sec.   63.10(b)(2)(vi)..........  Recordkeeping for   Yes.
                                   CMS malfunctions.
Sec.   63.10(b)(2)(vii)-(ix)....  Other CMS           Yes.
                                   requirements.
Sec.   63.10(b)(3), and (d)(3)-   ..................  No.
 (5).
Sec.   63.10(c)(7)..............  Additional          Yes.
                                   recordkeeping
                                   requirements for
                                   CMS--identifying
                                   exceedances and
                                   excess emissions.
Sec.   63.10(c)(8)..............  Additional          Yes.
                                   recordkeeping
                                   requirements for
                                   CMS--identifying
                                   exceedances and
                                   excess emissions.
Sec.   63.10(c)(10).............  Recording nature    No. See
                                   and cause of        63.10032(g) and
                                   malfunctions.       (h) for
                                                       malfunctions
                                                       recordkeeping
                                                       requirements.

Sec.   63.10(c)(11).............  Recording           No. See
                                   corrective          63.10032(g) and
                                   actions.            (h) for
                                                       malfunctions
                                                       recordkeeping
                                                       requirements.
Sec.   63.10(c)(15).............  Use of SSM Plan...  No.
Sec.   63.10(d)(5)..............  SSM reports.......  No. See
                                                       63.10031(h) and
                                                       (i) for
                                                       malfunction
                                                       reporting
                                                       requirements.
Sec.   63.11....................  Control Device      No.
                                   Requirements.
Sec.   63.12....................  State Authority     Yes.
                                   and Delegation.
Sec.   63.13-63.16..............  Addresses,          Yes.
                                   Incorporation by
                                   Reference,
                                   Availability of
                                   Information,
                                   Performance Track
                                   Provisions.
Sec.   63.1(a)(5), (a)(7)-        Reserved..........  No.
 (a)(9), (b)(2), (c)(3)-(4),
 (d), 63.6(b)(6), (c)(3),
 (c)(4), (d), (e)(2),
 (e)(3)(ii), (h)(3), (h)(5)(iv),
 63.8(a)(3), 63.9(b)(3), (h)(4),
 63.10(c)(2)-(4), (c)(9).
------------------------------------------------------------------------

Appendix A to Subpart UUUUU--Hg Monitoring Provisions

1. General Provisions

    1.1 Applicability. These monitoring provisions apply to the
measurement of total vapor phase mercury (Hg) in emissions from
electric utility steam generating units, using either a mercury
continuous emission monitoring system (Hg CEMS) or a sorbent trap
monitoring system. The Hg CEMS or sorbent trap monitoring system
must be capable of measuring the total vapor phase mercury in units
of the applicable emissions standard (e.g., lb/TBtu or lb/GWh),
regardless of speciation. The monitoring, recordkeeping, and
reporting provisions of this appendix shall be considered to be met
to the extent that they have already been, and are continuing to be,
met or exceeded under another Federal or State program.
    1.2 Initial Certification and Recertification Procedures. The
owner or operator of an affected unit that uses a Hg CEMS or a
sorbent trap monitoring system together with other necessary
monitoring components to account for Hg emissions in units of the
applicable emissions standard shall comply with the initial
certification and recertification procedures in section 4 of this
appendix.
    1.3 Quality Assurance and Quality Control Requirements. The
owner or operator of an affected unit that uses a Hg CEMS or a
sorbent trap monitoring system together with other necessary
monitoring components to account for Hg emissions in units of the
applicable emissions standard shall meet the applicable quality
assurance requirements in section 5 of this appendix.
    1.4 Missing Data Procedures. The owner or operator of an
affected unit is not required to substitute for missing data from Hg
CEMS or sorbent trap monitoring systems. Any process operating hour
for which the CEMS fails to produce quality-assured Hg mass
emissions data is counted as an hour of monitoring system downtime.

2. Monitoring of Hg Emissions for Various Configurations

    2.1 Single Unit-Single Stack Configuration. For an affected unit
that exhausts to the atmosphere through a single, dedicated stack,
the owner or operator shall install, certify, maintain, and operate
a Hg CEMS or a sorbent trap monitoring system and any other
necessary monitoring components needed to express the measured Hg
emissions in the units of the applicable emissions standard, in
accordance with section 3.2 of this appendix.
    2.2 Unit Utilizing Common Stack with Other Affected Unit(s).
When an affected unit utilizes a common stack with one or more other
affected units, but no non-affected units, the owner or operator
shall either:
    2.2.1 Install, certify, maintain, and operate the monitoring
systems described in paragraph 2.1 of this section in the duct to
the common stack from each unit; or
    2.2.2 Install, certify, maintain, and operate the monitoring
systems described in paragraph 2.1 of this section in the common
stack.
    2.3 Unit Utilizing Common Stack with Non-affected Units. When
one or more affected units shares a common stack with one or more
non-affected units, the owner or operator shall either:
    2.3.1 Install, certify, maintain, and operate the monitoring
systems described in paragraph 2.1 of this section in the duct to
the common stack from each affected unit; or
    2.3.2 Install, certify, maintain, and operate the monitoring
systems described in paragraph 2.1 of this section in the common
stack and attribute all of the Hg emissions measured at the common
stack to the affected unit(s).
    2.4 Unit with a Main Stack and a Bypass Stack. If the exhaust
configuration of an affected unit consists of a main stack and a
bypass stack, the owner and operator shall either:
    2.4.1 Install, certify, maintain, and operate the monitoring
systems described in paragraph 2.1 of this section on both the main
stack and the bypass stack; or
    2.4.2 Install, certify, maintain, and operate the monitoring
systems described in paragraph 2.1 of this section only on the main
stack, and report the maximum potential Hg concentration (as defined
in section <IP_ADDRESS>.1 of this appendix) for each unit operating hour
in which the bypass stack is used.
    2.5 Unit with Multiple Stack or Duct Configuration. If the flue
gases from an affected unit either: are discharged to the atmosphere
through more than one stack; or are fed into a single stack through
two or more ducts and the owner or operator chooses to monitor in
the ducts rather than in the stack, the owner or operator shall
either:
    2.5.1 Install, certify, maintain, and operate the monitoring
systems described in paragraph 2.1 of this section in each of the
multiple stacks; or
    2.5.2 Install, certify, maintain, and operate the monitoring
systems described in paragraph 2.1 of this section in each of the
ducts that feed into the stack.

3. Mercury Emissions Measurement Methods

    The following definitions, equipment specifications, procedures,
and performance criteria are applicable to the measurement of vapor-
phase Hg emissions from electric utility steam generating units,
under relatively low-dust conditions (i.e., sampling in the stack or
duct after all pollution control devices). The analyte measured by
these procedures and specifications is total vapor-phase Hg in the
flue gas, which represents the sum of elemental Hg (Hg\0\, CAS
Number 7439-97-6) and oxidized forms of Hg.
    3.1 Definitions.
    3.1.1 Mercury Continuous Emission Monitoring System or Hg CEMS
means all of the equipment used to continuously determine the total
vapor phase Hg concentration. The measurement system may include the
following major subsystems: Sample acquisition, Hg\+2\ to Hg\0\
converter, sample transport, sample conditioning, flow control/gas
manifold, gas analyzer, and data acquisition and handling system
(DAHS).
    3.1.2 Sorbent Trap Monitoring System means the equipment
required to monitor Hg emissions continuously, using paired sorbent
traps containing iodated charcoal (IC) or other suitable sorbent
medium. The monitoring system consists of a probe, paired sorbent
traps, an umbilical line, moisture removal components, an airtight
sample pump, a gas flow meter, and an automated data acquisition and
handling system. The system samples the stack gas at a rate
proportional to the stack gas volumetric flow

rate. The sampling is a batch process. The average Hg concentration
in the stack gas for the sampling period is determined, in units of
micrograms per dry standard cubic meter ([mu]g/dscm), based on the
sample volume measured by the gas flow meter and the mass of Hg
collected in the sorbent traps.
    3.1.3 NIST means the National Institute of Standards and
Technology, located in Gaithersburg, Maryland.
    3.1.4 NIST-traceable elemental Hg standards means either:
compressed gas cylinders having known concentrations of elemental
Hg, which have been prepared according to the ``EPA Traceability
Protocol for Assay and Certification of Gaseous Calibration
Standards''; or calibration gases having known concentrations of
elemental Hg, produced by a generator that meets the performance
requirements of the ``EPA Traceability Protocol for Qualification
and Certification of Elemental Mercury Gas Generators'', or an
interim version of that protocol.
    3.1.5 NIST-traceable source of oxidized Hg means a generator
that is capable of providing known concentrations of vapor phase
mercuric chloride (HgCl2), and that meets the performance
requirements of the ``EPA Traceability Protocol for Qualification
and Certification of Mercuric Chloride Gas Generators'', or an
interim version of that protocol.
    3.1.6 Calibration Gas means a NIST-traceable gas standard
containing known concentration of a gaseous species that is produced
and certified in accordance with an EPA traceability protocol.
    3.1.7 Span value means a conservatively high estimate of the gas
concentrations or stack gas flow rates to be measured by a CEMS. For
a Hg pollutant concentration monitor, the span value should be set
to approximately twice the concentration corresponding to the
emission standard, rounded off as appropriate.
    3.1.8 Zero-Level Gas means calibration gas with a concentration
that is below the level detectable by a gas monitoring system.
    3.1.9 Low-Level Gas means calibration gas with a concentration
that is 20 to 30 percent of the span value.
    3.1.10 Mid-Level Gas means calibration gas with a concentration
that is 50 to 60 percent of the span value.
    3.1.11 High-Level Gas means calibration gas with a concentration
that is 80 to 100 percent of the span value.
    3.1.12 Calibration Error Test means a test designed either to
assess the ability of a gas monitor to measure the concentrations of
calibration gases accurately, or the ability of a flow monitor to
read electronic reference signals accurately. A zero-level gas (or
signal) and an upscale gas (or signal) are required for this test.
For gas monitors, either a mid-level gas or a high-level gas may be
used. For a flow monitor, an upscale signal of 50 to 70 percent of
the calibration span value is required. For a Hg CEMS, the upscale
gas may either be an elemental or oxidized Hg standard.
    3.1.13 Linearity Check means a test designed to determine
whether the response of a gas analyzer is linear across its
measurement range. Three calibration gas standards (i.e., low, mid,
and high-level gases) are required for this test. For a Hg CEMS,
elemental Hg calibration standards are required.
    3.1.14 System Integrity Check means a test designed to assess
the transport and measurement of oxidized Hg by a Hg CEMS. Oxidized
Hg standards are used for this test. For a three-level system
integrity check, low, mid, and high-level calibration gases are
required. For a single-level check, either a mid-level gas or a
high-level gas may be used.
    3.1.15 Cycle Time Test means a test designed to measure the
amount of time it takes for a gas monitor, while operating normally,
to respond to a known step change in gas concentration. For this
test, a zero gas and a high-level gas are required. For a Hg CEMS,
the high-level gas may be either an elemental or an oxidized Hg
standard.
    3.1.16 Relative Accuracy Test Audit or RATA means a series of
nine or more test runs, directly comparing readings from a CEMS or
sorbent trap monitoring system to measurements made with a reference
stack test method. The relative accuracy (RA) of the monitoring
system is expressed as the absolute mean difference between the
monitoring system and reference method measurements plus the
absolute value of the 2.5 percent error confidence coefficient,
divided by the mean value of the reference method measurements.
    3.1.17 Unit Operating Hour means a clock hour in which a unit
combusts any fuel, either for part of the hour or for the entire
hour.
    3.1.18 Stack Operating Hour means a clock hour in which gases
flow through a particular monitored stack or duct (either for part
of the hour or for the entire hour), while the associated unit(s)
are combusting fuel.
    3.1.19 Unit Operating Day means a calendar day in which a unit
combusts any fuel.
    3.1.20 QA Operating Quarter means a calendar quarter in which
there are at least 168 unit or stack operating hours (as defined in
this section).
    3.1.21 Grace Period means a specified number of unit or stack
operating hours after the deadline for a required quality-assurance
test of a continuous monitor has passed, in which the test may be
performed and passed without loss of data.
    3.2 Continuous Monitoring Methods.
    3.2.1 Hg CEMS. A typical Hg CEMS is shown in Figure A-1. The
CEMS in Figure A-1 is a dilution extractive system, which measures
Hg concentration on a wet basis, and is the most commonly-used type
of Hg CEMS. Other system designs may be used, provided that the CEMS
meets the performance specifications in section 4.1.1 of this
appendix.

[GRAPHIC] [TIFF OMITTED] TP03MY11.030

    <IP_ADDRESS> Equipment Specifications.
    <IP_ADDRESS>.1 Materials of Construction. All wetted sampling system
components, including probe components prior to the point at which
the calibration gas is introduced, must be chemically inert to all
Hg species. Materials such as perfluoroalkoxy (PFA) Teflon\TM\,
quartz, treated stainless steel (SS) are examples of such materials.
    <IP_ADDRESS>.2 Temperature Considerations. All system components
prior to the Hg\+2\ to Hg\0\ converter must be maintained at a
sample temperature above the acid gas dew point.
    <IP_ADDRESS>.3 Measurement System Components.
    <IP_ADDRESS>.3.1 Sample Probe. The probe must be made of the
appropriate materials as noted in paragraph <IP_ADDRESS>.1 of this
section, heated when necessary, as described in paragraph
<IP_ADDRESS>.3.4 of this section, and configured with ports for
introduction of calibration gases.
    <IP_ADDRESS>.3.2 Filter or Other Particulate Removal Device. The
filter or other particulate removal device is part of the
measurement system, must be made of appropriate materials, as noted
in paragraph <IP_ADDRESS>.1 of this section, and must be included in all
system tests.
    <IP_ADDRESS>.3.3 Sample Line. The sample line that connects the probe
to the converter, conditioning system, and analyzer must be made of
appropriate materials, as noted in paragraph <IP_ADDRESS>.1 of this
section.
    <IP_ADDRESS>.3.4 Conditioning Equipment. For wet basis systems, such
as the one shown in Figure A-1, the sample must be kept above its
dew point either by: Heating the sample line and all sample
transport components up to the inlet of the analyzer (and, for hot-
wet extractive systems, also heating the analyzer); or diluting the
sample prior to analysis using a dilution probe system. The
components required for these operations are considered to be
conditioning equipment. For dry basis measurements, a condenser,
dryer or other suitable device is required to remove moisture
continuously from the sample gas, and any equipment needed to heat
the probe or sample line to avoid condensation prior to the moisture
removal component is also required.
    <IP_ADDRESS>.3.5 Sampling Pump. A pump is needed to push or pull the
sample gas through the system at a flow rate sufficient to minimize
the response time of the measurement system. If a mechanical sample
pump is used and its surfaces are in contact with the sample gas
prior to detection, the pump must be leak free and must be
constructed of a material that is non-reactive to the gas being
sampled (see paragraph <IP_ADDRESS>.1 of this section). For dilution-type
measurement systems, such as the system shown in Figure A-1, an
ejector pump (eductor) may be used to create a sufficient vacuum
that sample gas will be drawn through a critical orifice at a
constant rate. The ejector pump may be constructed of any material
that is non-reactive to the gas being sampled.
    <IP_ADDRESS>.3.6 Calibration Gas System(s). Design and equip each Hg
monitor to permit the introduction of known concentrations of
elemental Hg and HgCl2 separately, at a point preceding
the sample extraction filtration system, such that the entire
measurement system can be checked. The calibration gas system(s)
must be designed so that the flow rate exceeds the sampling system
flow requirements and that the gas is delivered to the CEMS at
atmospheric pressure.
    <IP_ADDRESS>.3.7 Sample Gas Delivery. The sample line may feed
directly to a converter, to a by-pass valve (for Hg speciating
systems), or to a sample manifold. All valve and/or manifold
components must be made of material that is non-reactive to the gas
sampled and the calibration gas, and must be configured to safely
discharge any excess gas.
    <IP_ADDRESS>.3.8 Hg Analyzer. An instrument is required that
continuously measures the total vapor phase Hg concentration in the
gas stream. The analyzer may also be capable of measuring elemental
and oxidized Hg separately.
    <IP_ADDRESS>.3.9 Data Recorder. A recorder, such as a computerized
data acquisition and handling system (DAHS), digital recorder, or
data logger, is required for recording measurement data.
    <IP_ADDRESS> Reagents and Standards.
    <IP_ADDRESS>.1 NIST Traceability. Only NIST-certified or NIST-
traceable calibration gas standards and reagents (as defined in
paragraphs 3.1.4 and 3.1.5 of this section) shall be used for the
tests and procedures required under this subpart. Calibration gases
with known concentrations of Hg\0\ and HgCl2 are
required. Special reagents and equipment may be needed to prepare
the Hg\0\ and HgCl2 gas standards (e.g., NIST-traceable
solutions of HgCl2 and gas generators equipped with mass
flow controllers).
    <IP_ADDRESS>.2 Required Calibration Gas Concentrations.
    <IP_ADDRESS>.2.1 Zero-Level Gas. A zero-level calibration gas with a
Hg concentration below the detectable limit of the analyzer is
required for calibration error tests and cycle time tests of the
CEMS.
    <IP_ADDRESS>.2.2 Low-Level Gas. A low-level calibration gas with a Hg
concentration of 20 to 30 percent of the span value is required for
linearity checks and 3-level system integrity checks of the CEMS.
Elemental Hg standards are required for the linearity checks and
oxidized Hg standards are required for the system integrity checks.
    <IP_ADDRESS>.2.3 Mid-Level Gas. A mid-level calibration gas with a Hg
concentration of 50

to 60 percent of the span value is required for linearity checks and
for 3-level system integrity checks of the CEMS, and is optional for
calibration error tests and single-level system integrity checks.
Elemental Hg standards are required for the linearity checks,
oxidized Hg standards are required for the system integrity checks,
and either elemental or oxidized Hg standards may be used for the
calibration error tests.
    <IP_ADDRESS>.2.4 High-Level Gas. A high-level calibration gas with a
Hg concentration of 80 to 100 percent of the span value is required
for linearity checks, 3-level system integrity checks, and cycle
time tests of the CEMS, and is optional for calibration error tests
and single-level system integrity checks. Elemental Hg standards are
required for the linearity checks, oxidized Hg standards are
required for the system integrity checks, and either elemental or
oxidized Hg standards may be used for the calibration error and
cycle time tests.
    <IP_ADDRESS> Installation and Measurement Location. For the Hg CEMS
and any additional monitoring system(s) needed to convert Hg
concentrations to the desired units of measure (i.e., a flow
monitor, CO2 or O2 monitor, and/or moisture
monitor, as applicable), install each monitoring system at a
location: That represents the emissions exiting to the atmosphere;
and at which it is likely that the CEMS can pass the relative
accuracy test.
    <IP_ADDRESS> Monitor Span and Range Requirements. Determine the
appropriate span and range value(s) for the Hg CEMS as described in
paragraphs <IP_ADDRESS>.1 through <IP_ADDRESS>.3 of this section.
    <IP_ADDRESS>.1 Maximum Potential Concentration. There are three
options for determining the maximum potential Hg concentration
(MPC). Option 1 applies to coal combustion. You may use a default
value of 10 [micro]g/scm for all coal ranks (including coal refuse)
except for lignite; for lignite, use 16 [micro]g/scm. Option 2 is to
base the MPC on the results of site-specific Hg emission testing.
This option may be used only if the unit does not have add-on Hg
emission controls or a flue gas desulfurization system, or if
testing is performed upstream of all emission control devices. If
Option 2 is selected, perform at least three test runs at the normal
operating load, and the highest Hg concentration obtained in any of
the tests shall be the MPC. If different coals are blended as part
of normal operation, use the highest MPC for any fuel in the blend.
Option 3 is to use fuel sampling and analysis to estimate the MPC.
To make this estimate, use the average Hg content (i.e., the weight
percentage) from at least three representative fuel samples,
together with other available information, including, but not
limited to the maximum fuel feed rate, the heating value of the
fuel, and an appropriate F-factor. Assume that all of the Hg in the
fuel is emitted to the atmosphere as vapor-phase Hg.
    <IP_ADDRESS>.2 Span Value. To determine the span value of the Hg
CEMS, multiply the Hg concentration corresponding to the applicable
emissions standard by two. If the result of this calculation is an
exact multiple of 10 [micro]g/scm, use the result as the span value.
Otherwise, round off the result to the next highest integer.
Alternatively, you may round off the span value to the next highest
multiple of 10 [micro]g/scm.
    <IP_ADDRESS>.3 Full-Scale Range. The full-scale range of the Hg
analyzer output must include the MPC.
    3.2.2 Sorbent Trap Monitoring System. A sorbent trap monitoring
system (as defined in paragraph 3.1.2 of this section) may be used
as an alternative to a Hg CEMS. If this option is selected, the
monitoring system shall be installed, maintained, and operated in
accordance with Performance Specification 12B in Appendix B to part
60 of this chapter. The system shall be certified in accordance with
the provisions of section 4.1.2 of this appendix.
    3.2.3 Other Necessary Monitoring Systems. When the applicable Hg
emission limit is specified in units of lb/TBtu or lb/GWh, some or
all of the monitoring systems described in paragraphs <IP_ADDRESS> and
<IP_ADDRESS> of this section will be needed to convert the measured Hg
concentrations to the units of the emissions standard. These
additional monitoring systems shall be installed, certified,
maintained, operated, and quality-assured according to the
applicable provisions of this appendix (see section 4.1.3 of this
appendix). The calculation methods for the types of emission limits
described in paragraphs <IP_ADDRESS> and <IP_ADDRESS> of this section are
presented in section 6.2 of this appendix.
    <IP_ADDRESS> Heat Input-Based Emission Limits. For a heat input-based
Hg emission limit (e.g., in lb/TBtu), data from a certified
CO2 or O2 monitor are needed, along with a
fuel-specific F-factor and a conversion constant to convert measured
Hg concentration values to the units of the standard. In some cases,
the stack gas moisture content must also be accounted for, as
follows:
    <IP_ADDRESS>.1 Determine the stack gas moisture content using a
certified continuous moisture monitoring system; or
    <IP_ADDRESS>.2 Use the moisture value determined during the most
recent Hg emissions test while combusting the fuel type currently in
use; or
    <IP_ADDRESS>.3 For coal combustion, use a fuel-specific moisture
default value. For anthracite coal, use 3.0% H2O; for
bituminous coal, use 6.0% H2O; for sub-bituminous coal,
use 8.0% H2O; and for lignite, use 11.0% H2O.
    <IP_ADDRESS> Electrical Output-Based Emission Rates. If the
applicable Hg limit is electrical output-based (e.g., lb/GWh),
hourly electrical load data and unit operating times are required in
addition to hourly data from a certified flow rate monitor and (if
applicable) moisture data.
    <IP_ADDRESS> Span and Range of Flow Rate, Diluent Gas, and Moisture
Monitors. Set the span value of a CO2 or O2
monitor at 1.00 to 1.25 times the maximum potential concentration.
Set the span value of a flow rate monitor at 1.00 to 1.25 times the
maximum potential flow rate, in units of standard cubic feet per
hour (scfh). If the units of measure for daily calibrations of the
flow monitor are not expressed in scfh, convert the calculated span
value from scfh to an equivalent ``calibration span value'' in the
units of measure actually used for daily calibrations. Set the full-
scale range of the CO2, O2, and flow monitors
such that the majority of the data will fall between 20 and 80% of
full-scale. For a continuous moisture sensor, there is no span value
requirement; set up and operate the instrument according to the
manufacturer's instructions.

4. Certification and Recertification Requirements

    4.1 Certification Requirements. All Hg CEMS and sorbent trap
systems and the monitoring systems used to continuously measure Hg
emissions in units of the applicable emissions standard in
accordance with this appendix must be certified prior to the
applicable compliance date specified in Sec.  63.9984.
    4.1.1 Hg CEMS. Table A-1, below, summarizes the certification
test requirements and performance specifications for a Hg CEMS. The
CEMS may not be used to report quality-assured data until these
performance criteria are met. Paragraphs <IP_ADDRESS> through <IP_ADDRESS> of
this section provide specific instructions for the required tests.
    <IP_ADDRESS> 7-Day Calibration Error Test. Perform the 7-day
calibration error test on 7 consecutive operating days, using a
zero-level gas and either a high-level or a mid-level calibration
gas standard (as defined in sections 3.1.8, 3.1.10, and 3.1.11 of
this appendix). Either elemental or oxidized NIST-traceable Hg
standards (as defined in sections 3.1.4 and 3.1.5 of this appendix)
may be used for the test. If moisture and/or chlorine is added to
the calibration gas, the dilution effect of the moisture and/or
chlorine addition on the calibration gas concentration must be
accounted for in an appropriate manner. Operate each monitor in its
normal sampling mode during the test. The calibrations should be
approximately 24 hours apart, unless the 7-day test is performed
over nonconsecutive calendar days. On each day of the test, inject
the zero-level and upscale gases in sequence and record the analyzer
responses. Pass the calibration gas through all filters, scrubbers,
conditioners, and other monitor components used during normal
sampling, and through as much of the sampling probe as is practical.
Do not make any manual adjustments to the monitor (i.e., resetting
the calibration) until after taking measurements at both the zero
and upscale concentration levels. If automatic adjustments are made
following both injections, conduct the calibration error test such
that the magnitude of the adjustments can be determined, and use
only the unadjusted analyzer responses in the calculations.
Calculate the calibration error (CE) on each day of the test, as
described in Table A-1. The CE on each day of the test must either
meet the main performance specification or the alternative
specification in Table A-1.

               Table A-1--Required Certification Tests and Performance Specifications for Hg CEMS
----------------------------------------------------------------------------------------------------------------
                                                                     The alternate
 For this required certification test    The main performance         performance         And the conditions of
                . . .                   specification \1\ is .   specification \1\ is .       the alternate
                                                 . .                      . .            specification are . . .
----------------------------------------------------------------------------------------------------------------
7-day calibration error test \2\.....  [verbar] R-A [verbar]    [verbar] R-A [verbar]    The alternate
                                        <= 5.0% of span value,   <= 1.0 [mu]g/scm.        specification may be
                                        for both the zero and                             used on any day of the
                                        upscale gases, on each                            test.
                                        of the 7 days.
Linearity check \3\..................  [verbar] R-Aavg          [verbar] R-Aavg          The alternate
                                        [verbar] <= 10.0% of     [verbar] <= 0.8 [mu]g/   specification may be
                                        the reference gas        scm.                     used at any gas level.
                                        concentration at each
                                        calibration gas level.
3-level system integrity check \4\...  [verbar] R-Aavg          [verbar] R-Aavg          The alternate
                                        [verbar] <= 10.0% of     [verbar] <= 0.8 [mu]g/   specification may be
                                        the reference gas        scm.                     used at any gas level.
                                        concentration at each
                                        calibration gas level.
RATA.................................  20.0% RA...............  [verbar] RMavg-Cavg      RMavg < 5.0 [mu]g/scm.
                                                                 [verbar] <= 1.0 [mu]g/
                                                                 scm **.
Cycle time test \2\                    15 minutes.\5\.........
----------------------------------------------------------------------------------------------------------------
\1\ Note that [verbar] R-A [verbar] is the absolute value of the difference between the reference gas value and
  the analyzer reading. [verbar] R-Aavg [verbar] is the absolute value of the difference between the reference
  gas concentration and the average of the analyzer responses, at a particular gas level.
\2\ Use either elemental or oxidized Hg standards.
\3\ Use elemental Hg standards.
\4\ Use oxidized Hg standards. Not required if the CEMS does not have a converter.
\5\ Stability criteria-Readings change by < 2.0% of span or by <= 0.5 [mu]g/m\3\, for 2 minutes.
** Note that [verbar] RMavg-Cavg [verbar] is the absolute difference between the mean reference method value and
  the mean CEMS value from the RATA. The arithmetic difference between RMavg and Cavg can be either + or -.

    <IP_ADDRESS> Linearity Check. Perform the linearity check using low,
mid, and high-level concentrations of NIST-traceable elemental Hg
standards. Three gas injections at each concentration level are
required, with no two successive injections at the same
concentration level. Introduce the calibration gas at the gas
injection port, as specified in section <IP_ADDRESS>.3.6 of this
appendix. Operate each monitor at its normal operating temperature
and conditions. Pass the calibration gas through all filters,
scrubbers, conditioners, and other monitor components used during
normal sampling, and through as much of the sampling probe as is
practical. If moisture and/or chlorine is added to the calibration
gas, the dilution effect of the moisture and/or chlorine addition on
the calibration gas concentration must be accounted for in an
appropriate manner. Record the monitor response from the data
acquisition and handling system for each gas injection. At each
concentration level, use the average analyzer response to calculate
the linearity error (LE), as described in Table A-1. The LE must
either meet the main performance specification or the alternative
specification in Table A-1.
    <IP_ADDRESS> Three-Level System Integrity Check. Perform the 3-level
system integrity check using low, mid, and high-level calibration
gas concentrations generated by a NIST-traceable source of oxidized
Hg. Follow the same basic procedure as for the linearity check. If
moisture and/or chlorine is added to the calibration gas, the
dilution effect of the moisture and/or chlorine addition on the
calibration gas concentration must be accounted for in an
appropriate manner. Calculate the system integrity error (SIE), as
described in Table A-1. The SIE must either meet the main
performance specification or the alternative specification in Table
A-2. (Note: This test is not required if the CEMS does not have a
converter).
    <IP_ADDRESS> Cycle Time Test. Perform the cycle time test, using a
zero-level gas and a high-level calibration gas. Either an elemental
or oxidized NIST-traceable Hg standard may be used as the high-level
gas. Perform the test in two stages--upscale and downscale. The
slower of the upscale and downscale response times is the cycle time
for the CEMS. Begin each stage of the test by injecting calibration
gas after achieving a stable reading of the stack emissions. The
cycle time is the amount of time it takes for the analyzer to
register a reading that is 95 percent of the way between the stable
stack emissions reading and the final, stable reading of the
calibration gas concentration. Use the following criterion to
determine when a stable reading of stack emissions or calibration
gas has been attained--the reading is stable if it changes by no
more than 2.0 percent of the span value or 0.5 [mu]g/scm (whichever
is less restrictive) for two minutes.
    <IP_ADDRESS> Relative Accuracy Test Audit (RATA). Perform the RATA of
the Hg CEMS at normal load. Acceptable Hg reference methods for the
RATA include ASTM D6784-02 (the Ontario Hydro Method) and Methods
29, 30A, and 30B in appendix A-8 to part 60 of this chapter. When
Method 29 or the Ontario Hydro Method is used, paired sampling
trains are required. To validate a Method 29 or Ontario Hydro test
run, calculate the relative deviation (RD) using Equation A-1 of
this section, and assess the results as follows to validate the run.
The RD must not exceed 10 percent, when the average Hg concentration
is greater than 1.0 [mu]g/dscm. If the average concentration is
<=1.0 [mu]g/dscm, the RD must not exceed 20 percent. The RD results
are also acceptable if the absolute difference between the two Hg
concentrations does not exceed 0.03 [mu]g/dscm. If the RD
specification is met, the results of the two samples shall be
averaged arithmetically.
[GRAPHIC] [TIFF OMITTED] TP03MY11.031

Where:

RD = Relative deviation between the Hg concentrations of samples
``a'' and ``b'' (percent)
Ca = Hg concentration of Hg sample ``a'' ([mu]g/dscm)
Cb = Hg concentration of Hg sample ``b'' ([mu]g/dscm)

    <IP_ADDRESS>.1 Special Considerations. Special Considerations. A
minimum of nine valid test runs must be performed, directly
comparing the CEMS measurements to the reference method. If 12 or
more runs are performed, you may discard the results from a maximum
of three runs for calculating relative accuracy. The minimum time
per run is 21 minutes if Method 30A is used. If the Ontario Hydro
Method, Method 29, or Method 30B is used, the time per run must be
long enough to collect a sufficient mass of Hg to analyze. Complete
the RATA within 168 unit operating hours, except when the Ontario
Hydro Method or Method 29 is used, in which case up to 336 operating
hours may be taken to finish the test.
    <IP_ADDRESS>.2 Calculation of RATA Results. Calculate the relative
accuracy (RA) of the monitoring system, on a [mu]g/scm basis, as
described in section 12 of Performance Specification 2 or 6 in
Appendix B to part 60 of this chapter. The CEMS must either meet the
main performance specification or the alternative specification in
Table A-1.

    <IP_ADDRESS>.3 Bias Adjustment. Measurement or adjustment of Hg CEMS
data for bias is not required.
    4.1.2 Sorbent Trap Monitoring Systems. For the initial
certification of a sorbent trap monitoring system, only a RATA is
required.
    <IP_ADDRESS> Reference Methods. The acceptable reference methods for
the RATA of a sorbent trap system are listed in paragraph <IP_ADDRESS> of
this section.
    <IP_ADDRESS> Special Considerations. The special considerations
specified in paragraph <IP_ADDRESS>.1 of this section apply to the RATA
of a sorbent trap monitoring system. During the RATA, the monitoring
system must be operated and quality-assured in accordance with
Performance Specification 12B in Appendix B to part 60 of this
chapter. The type of sorbent material used by the traps during the
RATA must be the same as for daily operation of the monitoring
system; however, the size of the traps used for the RATA may be
smaller than the traps used for daily operation of the system.
    <IP_ADDRESS> Calculation of RATA Results. Calculate the relative
accuracy (RA) of the Hg concentration monitoring system, on a
[micro]g/scm basis, as described in section 12 of Performance
Specification 2 or 6 in appendix B to part 60 of this chapter. The
main and alternative RATA performance specifications in Table A-1
for Hg CEMS also apply to the sorbent trap monitoring system.
    <IP_ADDRESS> Bias Adjustment. Measurement or adjustment of sorbent
trap monitoring system data for bias is not required.
    4.1.3 Diluent Gas, Flow Rate, and/or Moisture Monitoring
Systems. Monitoring systems that are used to measure stack gas
volumetric flow rate and/or diluent gas concentration and/or stack
gas moisture content in order to convert Hg concentration data to
units of the applicable emission limit must be certified. The
minimum certification test requirements and performance
specifications for these systems are shown in Table A-2, below.
    4.2 Recertification. Whenever the owner or operator makes a
replacement, modification, or change to a certified Hg CEMS, sorbent
trap monitoring system, flow rate monitoring system, diluent gas
monitoring system, or moisture monitoring system that may
significantly affect the ability of the system to accurately measure
or record the Hg concentration, stack gas volumetric flow rate,
CO2 concentration, O2 concentration, or stack
gas moisture content, the owner or operator shall recertify the
monitoring system. Furthermore, whenever the owner or operator makes
a replacement, modification, or change to the flue gas handling
system or the unit operation that may significantly change the flow
or concentration profile, the owner or operator shall recertify the
monitoring system. The same tests performed for the initial
certification of the monitoring system shall be repeated for
recertification, unless otherwise specified by the Administrator.
Examples of changes that require recertification include:
replacement of a gas analyzer; complete monitoring system
replacement, and changing the location or orientation of the
sampling probe.

   Table A-2--Minimum Required Certification Tests and Performance Specifications for Other Monitoring Systems
----------------------------------------------------------------------------------------------------------------
                                                                                And the conditions
                                   Of this auxiliary       The main          The alternate     of the alternate
 For this required certification   monitoring system      performance         performance      specification are
           test . . .                    . . .         specification \1\   specification \2\         . . .
                                                           is . . .            is . . .
----------------------------------------------------------------------------------------------------------------
7-day calibration error test....  O2 or CO2.........  [bond] R - A                            ..................
                                                       [bond] <= 0.5% O2
                                                       or CO2 for both
                                                       the zero and
                                                       upscale gases, on
                                                       each day of the
                                                       test.
7-day calibration error test....  Flow rate.........  [bond] R -A [bond]  [bond] R - A        The alternate
                                                       <= 3.0% of          [bond] <= 0.01      specification may
                                                       calibration span    in. H2O, for DP-    be used on any
                                                       value for both      type monitors.      day of the tests.
                                                       the zero and
                                                       upscale signals,
                                                       on each day of
                                                       the test.
Linearity check.................  O2 or CO2.........  [bond] R - Aavg     [bond] R -A [bond]  The alternate
                                                       [bond] <= 5.0% of   <= 0.5% O2 or CO2.  specification may
                                                       the reference gas                       be used at any
                                                       value.                                  gas level.
Cycle time test.................  O2 or CO2.........  <= 15 minutes.                          ..................
RATA............................  O2 or CO2.........  10.0% RA..........  [bond] RMavg -      ..................
                                                                           Cavg [bond] <=
                                                                           1.0% O2 or % CO2.
RATA............................  Flow rate.........  10.0% RA.                               ..................
RATA............................  Moisture..........  10.0% RA..........  [bond] RMavg -      ..................
                                                                           Cavg [bond] <=
                                                                           1.5% H2O.
----------------------------------------------------------------------------------------------------------------
\1\ Note that [bond] R -A [bond] is the absolute value of the difference between the reference gas value and the
  analyzer reading. [bond] R - Aavg [bond] is the absolute value of the difference between the reference gas
  concentration and the average of the analyzer responses, at a particular gas level.
\2\ Note that [bond] RMavg - Cavg [bond] is the absolute difference between the mean reference method value and
  the mean CEMS value from the RATA. The arithmetic difference between RMavg and Cavg can be either + or -.

5. Ongoing Quality Assurance (QA) and Data Validation

    5.1 Hg CEMS.
    5.1.1 Required QA Tests. Periodic QA testing of each Hg CEMS is
required following initial certification. The required QA tests, the
test frequencies, and the performance specifications that must be
met are summarized in Table A-3, below.
    5.1.2 Test Frequency. The frequency for the required QA tests of
the Hg CEMS shall be as follows:
    <IP_ADDRESS> Perform calibration error tests of the Hg CEMS daily.
Use either NIST-traceable elemental Hg standards or NIST-traceable
oxidized Hg standards for these calibrations. A zero-level gas and
either a mid-level or high-level gas are required for these
calibrations.
    <IP_ADDRESS> Perform a linearity check of the Hg CEMS in each QA
operating quarter, using low-level, mid-level, and high-level NIST-
traceable elemental Hg standards. For units that operate
infrequently, limited exemptions from this test are allowed for
``non-QA operating quarters''. A maximum of three consecutive
exemptions for this reason are permitted, following the quarter of
the last test. After the third consecutive exemption, a linearity
check must be performed in the next calendar quarter or within a
grace period of 168 unit or stack operating hours after the end of
that quarter. The test frequency for 3-level system integrity checks
(if performed in lieu of linearity checks) is the same as for the