temperature compensation, set this value to 25 [deg]C (77 [deg]F).
Place the clean electrodes into the container of fresh conductivity
standard solution. Allow sufficient time for the response of your
CPMS to reach equilibrium. Record the conductivity measured by your
CPMS. Using the conductivity standard solution as the value for
Vc, follow the procedure specified in section 12.2 of
this specification to determine if your CPMS satisfies the accuracy
requirement of Table 8 of this specification. If you determine that
your CPMS satisfies the

accuracy requirement of Table 8, the validation check is complete.
If your CPMS does not satisfy the accuracy requirement of Table 8 of
this procedure, calibrate your conductivity CPMS using the
procedures specified in the manufacturer's owner's manual. If the
manufacturer's owner's manual does not specify a calibration
procedure, you must perform a calibration procedure based on ASTM D
1125-95 (2005) or ASTM D 5391-99 (2005) (incorporated by reference--
see Sec.  60.17). If you are required to measure and record
conductivity at multiple locations, repeat this procedure for each
location.
    8.9 Are there any acceptable alternative procedures for
installing and verifying my CPMS? You may use alternative procedures
for installing and verifying the operation of your CPMS if the
alternative procedures are approved by the Administrator. In
addition, for temperature and pressure CPMS, you can use the methods
specified in paragraphs (1) and (2) of this section, respectively,
to satisfy the initial validation check.
    (1) Alternative Temperature CPMS Validation Check. As an
alternative to the procedures for the temperature CPMS initial
validation check in this specification, you may use the methods
listed in Table 6 of this specification to determine the accuracy of
thermocouples or resistance temperature detectors. However, you also
must check the accuracy of the overall CPMS system using the methods
specified in section 8.4 of this specification or an alternative
method that has been approved by the Administrator.
    (2) Alternative Pressure CPMS Validation Check. As an
alternative to the procedure for the pressure CPMS initial
validation check in this specification, you may use the methods
listed in Table 7 of this specification to check the accuracy of the
pressure sensor associated with your pressure CPMS. However, you
also must check the accuracy of the overall CPMS using the methods
in section 8.5 of this specification or an alternative method that
has been approved by the Administrator.
    8.10 How do I perform a leak test on pressure connections, as
required by this specification? You can satisfy the leak test
requirements of sections 8.5 and 8.6 of this specification by
following the procedures described in paragraphs (1) through (3) of
this section.
    (1) For each pressure connection, apply a pressure that is equal
to the highest pressure the connection is likely to be subjected to
or 0.24 kilopascals (1.0 inch of water column), whichever is
greater.
    (2) Close off the connection between the applied pressure source
and the connection that is being leak-tested.
    (3) If the applied pressure remains stable for at least 15
seconds, the connection is considered to be leak tight. If the
applied pressure does not remain stable for at least 15 seconds,
take any corrective action necessary to make the connection leak
tight and repeat this leak test procedure.

9.0 What ongoing quality control measures are required?

    Ongoing quality control procedures for CPMS are specified in
Procedure 4 of appendix F of this part.

10.0 Calibration and Standardization [Reserved]

11.0 Analytical Procedure [Reserved]

12.0 What calculations are needed?

    The calculations needed to comply with this performance
specification are described in sections 12.1 and 12.2 of this
specification.
    12.1 How do I determine if a calibrated measurement device
satisfies the accuracy hierarchy specified in section 6.5 of this
specification. To determine if a calibrated measurement device
satisfies the accuracy hierarchy requirement, follow the procedure
described in paragraphs (1) and (2) of this section.
    (1) Calculate the accuracy hierarchy (Ah) using
Equation 17-1.
[GRAPHIC] [TIFF OMITTED] TP09OC08.010

Where:

Ah = Accuracy hierarchy, dimensionless.
Ar = Required accuracy (Ap or Av)
specified in Table 8 of this specification, percent or units of
parameter value (e.g., degrees Celsius, kilopascals, liters per
minute).
Ac= Accuracy of calibrated measurement device, same units
as Ar.

    (2) If the accuracy hierarchy (Ah) is equal to or
greater than 3.0, the calibrated measurement device satisfies the
accuracy hierarchy of Section 6.5 of this specification.
    12.2 How do I determine if my CPMS satisfies the accuracy
requirement of PS-17? To determine if your CPMS satisfies the
accuracy requirement of PS-17, follow the procedure described in
paragraphs (1) through (4) of this section.
    (1) If your CPMS measures temperature, pressure, or flow rate,
calculate the accuracy percent value (Apv) using Equation
17-2. If your CPMS measures pH, proceed to paragraph (2) of this
section.
[GRAPHIC] [TIFF OMITTED] TP09OC08.011

Where:

Apv = Accuracy percent value, units of parameter measured
(e.g., degrees Celsius, kilopascals, liters per minute).
Vc = Parameter value measured by the calibrated
measurement device or measured by your CPMS when a calibrated signal
simulator is applied to your CPMS during the initial validation
check, units of parameter measured (e.g., degrees Celsius,
kilopascals, liters per minute).
Ap = Accuracy percentage specified in Table 8 of this
specification that corresponds to your CPMS, percent.

    (2) If your CPMS measures temperature, pressure, or flow rate
other than mass flow rate or steam flow rate, compare the accuracy
percent value (Apv) to the accuracy value (Av)
in Table 8 of this specification and select the greater of the two
values. Use this greater value as the allowable deviation
(da) in paragraph (4) of this section. If your CPMS
measures pH, use the accuracy value (Av) specified in
Table 8 of this specification as the allowable deviation
(da). If your CPMS measures steam flow rate, mass flow
rate, or conductivity, use the accuracy percent value
(Apv) calculated using Equation 17-2 as the allowable
deviation (da).
    (3) Using Equation 17-3, calculate the measured deviation
(dm), which is the absolute value of the difference
between the parameter value measured by the calibrated device
(Vc) and the value measured by your CPMS (Vm).
[GRAPHIC] [TIFF OMITTED] TP09OC08.012

Where:

dm = Measured deviation, units of the parameter measured
(e.g., degrees Celsius, kilopascals, liters per minute).
Vc = Parameter value measured by the calibrated
measurement device or measured by your CPMS when a calibrated signal
simulator is applied to your CPMS during the initial validation
check, units of parameter measured (e.g., degrees Celsius,
kilopascals, liters per minute).
Vm = Parameter value measured by your CPMS during the
initial validation check, units of parameter measured (e.g., degrees
Celsius, kilopascals, liters per minute).

    (4) Compare the measured deviation (dm) to the
allowable deviation (da). If the measured deviation is
less than or equal to the allowable deviation, your CPMS satisfies
the accuracy requirement of this specification.

13.0 What initial performance criteria must I demonstrate for my CPMS
to comply with PS-17?

    You must demonstrate that your CPMS meets the accuracy
requirements specified in Table 8 of this specification.

14.0 What are the recordkeeping requirements for PS-17?

    You must satisfy the recordkeeping requirements specified in
Sections 14.1 and 14.2 of this specification.
    14.1 What data does PS-17 require me to record for my CPMS? For
each affected CPMS that you operate, you must record the information
listed in paragraphs (1) through (6) of this section.
    (1) Identification and location of the CPMS;
    (2) Manufacturer's name and model number of the CPMS;
    (3) Range of parameter values you expect your CPMS to measure
and record;
    (4) Date of the initial calibration and system validation check;
    (5) Results of the initial calibration and system validation
check; and
    (6) Name of the person(s) who performed the initial calibration
and system validation check.
    14.2 For how long must I maintain the data that PS-17 requires
me to record for my CPMS? You are required to keep the records
required by this specification for your CPMS for a period of 5
years. At a minimum, you must maintain the most recent 2 years of
data onsite and available for inspection by the enforcement agency.

15.0 Pollution Prevention [Reserved]

16.0 Waste Management [Reserved]

17.0 Which references are relevant to PS-17?

    1. Technical Guidance Document: Compliance Assurance Monitoring.
U.S. Environmental Protection Agency Office of Air Quality Planning
and Standards Emission Measurement Center. August 1998. (http://
www.epa.gov/ttn/emc/cam.html).
    2. NEMA Standard Publication 250. ``Enclosures for Electrical
Equipment (1000 Volts Maximum)''. National Electrical Manufacturers
Association. 1997.
    3. ASTM E-220-86 (1996): Standard Test Methods for Calibration
of Thermocouples by Comparison Techniques. American Society for
Testing and Materials. May 1986.
    4. MC96-1-1982: Temperature Measurement Thermocouples. American
National Standards Institute. August 1982.
    5. The pH and Conductivity Handbook. Omega Engineering, Inc.
1995.
    6. ASTM E-452-89: ``Standard Test Method for Calibration of
Refractory Metal Thermocouples Using an Optical Pyrometer''.
American Society of Testing and Materials. April 1989.
    7. ASTM E 644-06: ``Standard Test Methods for Testing Industrial
Resistance Thermometers''. American Society of Testing and
Materials. 2006.
    8. ASME B 40.100-2005: ``Pressure Gauges and Gauge
Attachments''. American Society of Mechanical Engineers. 2005.
    9. ASTM E 251-92 (2003): ``Standard Test Methods for Performance
Characteristics of Metallic Bonded Resistance Strain Gages''.
American Society for Testing and Materials. 2003.
    10. ASHRAE 41.8-1989: ``Standard Methods of Measurement of Flow
of Liquids in Pipes Using Orifice Flow Meters''. American Society of
Heating, Refrigerating and Air-Conditioning Engineers, Inc. 1989.
    11. ISA RP 16.6-1961: ``Methods and Equipment for Calibration of
Variable Area Meters (Rotameters)''. Instrumentation, Systems, and
Automation Society. 1961.
    12. ANSI/ISA-RP31.1-1977: ``Specification, Installation, and
Calibration of Turbine Flow Meters''. Instrumentation, Systems, and
Automation Society. 1977.
    13. ASTM E 1-95: ``Standard Specifications for ASTM
Thermometers''. American Society for Testing and Materials. 1995.
    14. ANSI/ASHRAE 41.1-1986: ``Standard Method for Temperature
Measurement'' American Society of Heating, Refrigerating, and Air-
Conditioning Engineers, Inc. February 1987.
    15. ANSI/ASHRAE 41.3-1989: ``Standard Method for Pressure
Measurement''. American Society of Heating, Refrigerating, and Air-
Conditioning Engineers, Inc. 1989.
    16. ISA RP 16.5-1961: ``Installation, Operation, and Maintenance
Instructions for Glass Tube Variable Area Meters (Rotameters)''.
Instrumentation, Systems, and Automation Society. 1961.
    17. ASME MFC-3M-2004: ``Measurement of Fluid Flow in Pipes Using
Orifice, Nozzle, and Venturi''. American Society of Mechanical
Engineers. 1989.
    18. ASTM E-1137-97: ``Standard Specification for Industrial
Platinum Resistance Thermometers''. American Society for Testing and
Materials. 1997.
    19. The Temperature Handbook. Omega Engineering, Inc. 2000.
    20. The Pressure, Strain and Force Handbook. Omega Engineering,
Inc. 1999.
    21. The Flow and Level Handbook. Omega Engineering, Inc. 2000.
    22. ASTM D-5464-93 (1997): ``Standard Test Methods for pH
Measurement of Water of Low Conductivity''. American Society for
Testing and Materials. 1993.
    23. ASTM D-1293-99: ``Standard Test Methods for pH of Water''.
American Society for Testing and Materials. 1999.
    24. ANSI/ASME MFC-4M-1986 (R2003): ``Measurement of Gas Flow by
Turbine Meters''. American Society of Mechanical Engineers. 2003.
    25. ASME/ANSI MFC-6M-1987: ``Measurement of Fluid Flow in Pipes
Using Vortex Flow Meters''. American Society of Mechanical
Engineers. 1987.
    26. ASME/ANSI MFC-7M-1987: ``Measurement of Gas Flow by Means of
Critical Flow Venturi Nozzles''. American Society of Mechanical
Engineers. 1987.
    27. ASME/ANSI MFC-9M-1988: ``Measurement of Liquid Flow in
Closed Conduits by Weighing Method''. American Society of Mechanical
Engineers. 1989.
    28. ASME/ANSI MFC-10M-1994: ``Measurement of Liquid Flow in
Closed Conduits by Volumetric Method''. American Society of
Mechanical Engineers. 1994.
    29. ISO 8316:1987: ``Measurement of Liquid Flow in Closed
Conduits-Method by Collection of Liquid in a Volumetric Tank''.
International Organization for Standardization. 1987.
    30. NIST Handbook 44--2002 Edition: ``Specifications,
Tolerances, And Other Technical Requirements for Weighing and
Measuring Devices, as adopted by the 86th National Conference on
Weights and Measures 2001'', Section 2.21: ``Belt-Conveyor Scale
Systems''.
    31. ISO 10790:1999: ``Measurement of Fluid Flow in Closed
Conduits-Guidance to the Selection, Installation, and Use of
Coriolis Meters (Mass Flow, Density and Volume Flow Measurements''.
International Organization for Standardization. 1999.
    32. ASTM D 1125-95 (2005): ``Standard Test Methods for
Electrical Conductivity and Resistivity of Water''. American Society
for Testing and Materials. 2005.
    33. ASTM D 5391-99 (2005): ``Standard Test Method for Electrical
Conductivity and Resistivity of a Flowing High Purity Water
Sample''. American Society for Testing and Materials. 2005.

18.0 What tables are relevant to PS-17?

            Table 1--Sensor Components of Commonly Used CPMS
------------------------------------------------------------------------
                                                    The sensor component
For a CPMS that measures . .      Using a . . .      consists of the . .
              .                                               .
------------------------------------------------------------------------
1. Temperature..............  a. Thermocouple.....  Thermocouple.
                              b. Resistance         RTD.
                               temperature
                               detector (RTD).
                              c. Optical pyrometer  Optical assembly and
                                                     detector.
                              d. Thermistor.......  Thermistor.
                              e. Temperature        Integrated circuit
                               transducer.           sensor?
------------------------------------------------------------------------
2. Pressure.................  a. Pressure gauge...  Gauge assembly,
                                                     including bourdon
                                                     element, bellows
                                                     element, or
                                                     diaphragm.
                              b. Pressure           Strain gauge
                               transducer.           assembly,
                                                     capacitance
                                                     assembly, linear
                                                     variable
                                                     differential
                                                     transformer, force
                                                     balance assembly,
                                                     potentiometer,
                                                     variable reluctance
                                                     assembly,
                                                     piezoelectric
                                                     assembly, or
                                                     piezoresistive
                                                     assembly.
                              c. Manometer........  U-tube or
                                                     differential
                                                     manometer.
------------------------------------------------------------------------
3. Flow rate................  a. Differential       Flow constricting
                               pressure device.      element (nozzle,
                                                     Venturi, or orifice
                                                     plate) and
                                                     differential
                                                     pressure sensor.
                              b. Differential       Pitot tube, or other
                               pressure tube.        array of tubes that
                                                     measure velocity
                                                     pressure and static
                                                     pressure, and
                                                     differential
                                                     pressure sensor.
                              c. Magnetic flow      Magnetic coil
                               meter.                assembly.

                              d. Positive           Piston, blade, vane,
                               displacement flow     propeller, disk, or
                               meter.                gear assembly.
                              e. Turbine flow       Rotor or turbine
                               meter.                assembly.
                              f. Vortex formation   Vortex generating
                               flow meter.           and sensing
                                                     elements.
                              g. Fluidic            Feedback passage,
                               oscillating flow      side wall, control
                               meter.                port, and thermal
                                                     sensor.
                              h. Ultrasonic flow    Sonic transducers,
                               meter.                receivers, timer,
                                                     and temperature
                                                     sensor.
                              i. Thermal flow       Thermal element and
                               meter.                temperature
                                                     sensors.
                              j. Coriolis mass      U-tube and magnetic
                               flow meter.           sensing elements.
                              k. Rotameter........  Float assembly.
                              l. Solids flow meter  Sensing plate.
                              m. Belt conveyor....  Scale.
------------------------------------------------------------------------
4. pH.......................  pH meter............  Electrode.
------------------------------------------------------------------------
5. Conductivity.............  Conductivity meter..  Electrode.
------------------------------------------------------------------------

            Table 2--Design Standards for Temperature Sensors
------------------------------------------------------------------------
                                    You can use the following design
   If the sensor is a . . .       standards as guidance in selecting a
                                       sensor for your CPMS . . .
------------------------------------------------------------------------
1. Thermocouple..............  a. ASTM E235-88 (1996), ``Specification
                                for Thermocouples, Sheathed, Type K, for
                                Nuclear or Other High-Reliability
                                Applications.''
                               b. ASTM E585/E 585M-04, ``Specification
                                for Compacted Mineral-Insulated, Metal-
                                Sheathed, Base Metal Thermocouple
                                Cables.''
                               c. ASTM E608/E 608M-06, ``Specification
                                for Mineral-Insulated, Metal-Sheathed
                                Base Metal Thermocouples.''
                               d. ASTM E696-07, ``Specification for
                                Tungsten-Rhenium Alloy Thermocouple
                                Wire.''
                               e. ASTM E1129/E 1129M-98 (2002),
                                ``Standard Specification for
                                Thermocouple Connectors.''
                               f. ASTM E1159-98 (2003), ``Specification
                                for Thermocouple Materials, Platinum-
                                Rhodium Alloys, and Platinum.''
                               g. ISA-MC96.1-1982, ``Temperature
                                Measurement Ther mo couples.''
2. Resistance temperature      ASTM E1137/E1137M-04, ``Standard
 detector.                      Specification for Industrial Platinum
                                Resistance Thermometers.''
------------------------------------------------------------------------

         Table 3--Standards for the Installation of Flow Sensors
------------------------------------------------------------------------
If the sensor of your flow CPMS is   You should install the flow sensor
              a . . .                        according to . . .
------------------------------------------------------------------------
1. Differential pressure device...  ASME MFC-3M-2004, ``Measurement of
                                     Fluid Flow in Pipes Using Orifice,
                                     Nozzle, and Venturi''.
2. Critical flow venturi flow       ASME/ANSI MFC-7M-1987 (R2001),
 meter used to measure gas flow      ``Measurement of Gas Flow by Means
 rate.                               of Critical Flow Venturi Nozzles''.
3. Turbine flow meter.............  ANSI/ISA RP 31.1-1977, ``Recommended
                                     Practice: Specification,
                                     Installation, and Calibration of
                                     Turbine Flowmeters'', or, if used
                                     for gas flow measurement, ANSI/ASME
                                     MFC-4M-1986 (R2003), ``Measurement
                                     of Gas Flow by Turbine Meters''.
4. Rotameter......................  ISA RP 16.5-1961, ``Installation,
                                     Operation, and Maintenance
                                     Instructions for Glass Tube
                                     Variable Area Meters
                                     (Rotameters)''.
5. Coriolis mass flow meter.......  ISO 10790:1999, ``Measurement of
                                     fluid flow in closed conduits--
                                     Guidance to the selection,
                                     installation and use of Coriolis
                                     meters (mass flow, density and
                                     volume flow measurements).
6. Vortex formation flow meter....  ASME/ANSI MFC-6M-1998 (R2005),
                                     ``Measurement of Fluid Flow in
                                     Pipes Using Vortex Flow Meters''.
------------------------------------------------------------------------

 Table 4--Volumetric Methods for Initial Validation Check of Flow Meters
------------------------------------------------------------------------
            Designation                             Title
------------------------------------------------------------------------
1. ISA RP 16.6-1961...............  ``Methods and Equipment for
                                     Calibration of Variable Area Meters
                                     (Rotameters)''.
2. ANSI/ISA RP 31.1-1977..........  ``Specification, Installation, and
                                     Calibration of Turbine Flow
                                     Meters''.
3. ISO 8316:1987..................  ``Measurement of Liquid Flow in
                                     Closed Conduits--Method by
                                     Collection of Liquid in a
                                     Volumetric Tank''.
------------------------------------------------------------------------

  Table 5--Weighing Methods for Initial Validation Check of Flow Meters
------------------------------------------------------------------------
            Designation                             Title
------------------------------------------------------------------------
1. ASHRAE 41.8-1989...............  ``Standard Methods of Measurement of
                                     Flow of Liquids in Pipes Using
                                     Orifice Flow Meters''.
2. ISA RP 16.6-1961...............  ``Methods and Equipment for
                                     Calibration of Variable Area Meters
                                     (Rotameters)''.
3. ANSI/ISA RP 31.1-1977..........  ``Specification, Installation, and
                                     Calibration of Turbine Flow
                                     Meters''.

4. ANSI/ASME MFC-9M-1988..........  ``Measurement of Liquid Flow in
                                     Closed Conduits by Weighing
                                     Method''.
------------------------------------------------------------------------

 Table 6--Alternate Methods for Initial Validation Check of Temperature
                                 Sensors
------------------------------------------------------------------------
                                                        You can perform
                                                          the initial
  If the temperature sensor in    And is used in . .   validation check
      your CPMS is a . . .                 .             of the sensor
                                                          using . . .
------------------------------------------------------------------------
1. Thermocouple.................  Any application...  ASTM E220-07e1.
2. Thermocouple.................  A reducing          ASTM E452-02
                                   environment.        (2007).
3. Resistance temperature         Any application...  ASTM E644-06.
 detector.
------------------------------------------------------------------------

   Table 7--Alternate Methods for Initial Validation Check of Pressure
                                 Sensors
------------------------------------------------------------------------
  If the pressure sensor in      You can perform the initial validation
     your CPMS is a . . .           check of the sensor using . . .
------------------------------------------------------------------------
1. Pressure gauge............  ASME B40.100-2005.
2. Metallic bonded resistance  ASTM E251-92 (2003).
 strain gauge.
------------------------------------------------------------------------

                   Table 8--CPMS Accuracy Requirements
------------------------------------------------------------------------
                                     You must demonstrate that your CPMS
    If your CPMS measures . . .             operates within . . .
------------------------------------------------------------------------
1. Temperature, in a non-cryogenic  An accuracy percentage (Ap) of 1.0 percent of the
                                     temperature measured in degrees
                                     Celsius or within an accuracy value
                                     (Av) of 2.8 degrees Celsius (5
                                     degrees Fahrenheit), whichever is
                                     greater.
2. Temperature, in a cryogenic      An accuracy percentage (Ap) of 2.5 percent of the
                                     temperature measured in degrees
                                     Celsius or within an accuracy value
                                     (Av) of 2.8 degrees Celsius (5
                                     degrees Fahrenheit), whichever is
                                     greater.
3. Pressure.......................  An accuracy percentage (Ap) of 5 percent or an accuracy
                                     value (Av) of 0.12 kilopascals (0.5
                                     inches of water column), whichever
                                     is greater.
4. Liquid flow rate...............  An accuracy percentage (Ap) of 5 percent or an accuracy
                                     value (Av) of 1.9 liters per minute
                                     (0.5 gallons per minute), whichever
                                     is greater.
5. Gas flow rate..................  a. A relative accuracy of 20 percent, if you
                                     demonstrate compliance using the
                                     relative accuracy test, or
                                    b. An accuracy percentage (Ap) of
                                     10 percent, if your
                                     CPMS measures steam flow rate, or
                                    c. An accuracy percentage (Ap) of
                                     5 percent or an
                                     accuracy value (Av) of 280 liters
                                     per minute (10 cubic feet per
                                     minute), whichever is greater, for
                                     all other gases and accuracy audit
                                     methods.
6. Mass flow rate.................  An accuracy percentage (Ap) of 5 percent.
7. pH.............................  An accuracy value (Av) of 0.2 pH units.
8. Conductivity...................  An accuracy percentage (Ap) of 5 percent.
------------------------------------------------------------------------

    5. Appendix F to part 60 is amended as follows:
    a. In Procedure 1, by:
    i. Revising the second (last) sentence in the first paragraph of
section 1.1; and
    ii. Adding sections 4.1.1, 4.1.2, 4.3.3, 4.4.1, 5.5.5, and 5.1.7.
    b. Adding Procedure 4 in numerical order to read as follows:

Appendix F to Part 60--Quality Assurance Procedures

Procedure 1. Quality Assurance Requirements for Gas Continuous
Emission Monitoring Systems Used for Compliance Determination

1. Applicability and Principle

    1.1 * * * The CEMS may include systems that monitor one
pollutant (e.g., SO2 or NOX), a combination of
pollutants (e.g., benzene and hexane), or diluents (e.g.,
O2 or CO2).
* * * * *

4. CD Assessment

* * * * *
    4.1.1 Multiple Organic Pollutant CEMS. Source owners and
operators of gas chromatographic CEMS that are subject to PS 9 and
are used to monitor multiple organic pollutants must perform the
daily CD requirement specified in section 4.1 of this procedure
using any one of the target pollutants specified in the applicable
regulation.
    4.1.2 CEMS Subject to PS 15. To satisfy the daily CD requirement
of this procedure, source owners and operators of extractive Fourier
Transfer Infrared (FTIR) CEMS that are subject to PS 15 must perform
at least once daily the calibration transfer standards check,
analyte spike check, and background deviation check specified in PS-
15 (40 CFR part 60, appendix B), sections 10.1, 10.4, and 10.6,
respectively. The analyte spike check can be performed using any of
the target analytes.
* * * * *
    4.3.3 Out-of-Control Definition for CEMS Subject to PS 15. If
the calibration transfer standards check, analyte spike check, or
background deviation check exceeds twice the accuracy criterion of
5 percent for five, consecutive daily periods, the CEMS
is out of control. If the calibration transfer standards check,
analyte spike check, or background deviation check exceeds four
times the accuracy criterion of 5 percent during any
daily calibration check, the CEMS is out of control. If the CEMS is
out of control, take necessary corrective action. Following
corrective action, repeat the calibration checks specified in this
section.
* * * * *
    4.4.1 Data Storage Requirements for CEMS Subject to PS 15. In
addition to the requirements of section 4.4 of this procedure,
source owners and operators of CEMS subject to PS-15 (40 CFR part
60, appendix B) must satisfy the data storage requirements of
section 6.3 of PS-15.
* * * * *

5. Data Accuracy Assessment

* * * * *
    5.1.5 Audits for CEMS Subject to PS 9. For CEMS that are subject
to PS 9, the requirements of section 5.1 of this procedure apply,
with the following exceptions:

    (1) The RATA specified in sections 5.1.1 and 5.1.4 of this
procedure does not apply.
    (2) The CGA must be conducted every calendar quarter.
    (3) The CGA must be conducted according to the procedures
specified in section 5.3 of PS-9 (40 CFR part 60, appendix B),
except that the audit must be performed at two points as specified
in section 5.1.2 of this procedure.
    (4) The CGA must be conducted for each target pollutant
specified in the applicable regulation.
    (5) The RAA specified in section 5.1.3 of this procedure does
not apply.
    (6) Audits conducted under this procedure fulfill the
requirement of section 5.3 of PS-9 (40 CFR part 60, appendix B) for
quarterly performance audits.
    5.1.6 Audits for CEMS Subject to PS-15. For CEMS that are
subject to PS-15 (40 CFR part 60, appendix B), the requirements of
section 5.1 of this procedure apply, with the following exceptions:
    (1) The RATA specified in sections 5.1.1 and 5.1.4, the CGA
specified in section 5.1.2, and the RAA specified in section 5.1.3
of this procedure do not apply.
    (2) To satisfy the quarterly accuracy audit requirement of this
procedure, one of the accuracy checks specified in PS-15 (40 CFR
part 60, appendix B), sections 9.1 (Audit Sample), 9.2 (Audit
Spectra), and 9.3 (Submit Spectra for Independent Analysis) must be
performed at least once each calendar quarter, consistent with the
following additional criteria:
    (i) The audit sample check, specified in section 9.1 of PS-15
(40 CFR part 60, appendix B), must be conducted at least once every
four calendar quarters.
    (ii) The audit spectra check, specified in section 9.2 of PS-15
(40 CFR part 60, appendix B), can be used to satisfy the quarterly
accuracy audit requirement only once every four calendar quarters.
    (3) Audits conducted under this procedure fulfill the
requirement of section 9 of PS-15 (40 CFR part 60, appendix B) for
quarterly or semiannual QA/QC checks on the operation of extractive
FTIR CEMS.
* * * * *

Procedure 4. Quality Assurance Requirements for Continuous
Parameter Monitoring Systems at Stationary Sources

1.0 What is the purpose of this procedure?

    The purpose of this procedure is to establish the minimum
requirements for evaluating on an ongoing basis the quality of data
produced by your continuous parameter monitoring system (CPMS), and
the effectiveness of quality assurance (QA) and quality control (QC)
procedures that you have developed for your CPMS. This procedure
applies instead of the QA and QC requirements for applicable CPMS
specified in any applicable subpart to parts 60, 61, or 63, unless
otherwise specified in the applicable subpart. This procedure
presents requirements in general terms to allow you to develop a QC
program that is most effective for your circumstances. This
procedure does not restrict your current QA/QC procedures to ensure
compliance with applicable regulations. Instead, you are encouraged
to develop and implement a more extensive QA/QC program or to
continue such programs where they already exist.
    1.1 To what types of devices does Procedure 4 apply? This
procedure applies to any CPMS that is subject to Performance
Specification 17 (PS-17).
    1.2 When must I comply with Procedure 4? You must comply with
this procedure when conditions (1) or (2) of this section occur.
    (1) At the time you install and place into operation a CPMS that
is subject to PS-17.
    (2) At the time any of your existing CPMS become subject to PS-
17.
    1.3 How does Procedure 4 affect me if I am also subject to QA
procedures under another applicable subpart? This procedure does not
apply if any more stringent QA requirements apply to you under an
applicable requirement. You are required to comply with the more
stringent of the applicable QA requirements.

2.0 What are the basic requirements of Procedure 4?

    This procedure requires all owners and operators of a CPMS to
perform periodic QA evaluations of CPMS performance and to develop
and implement QC programs to ensure that CPMS data quality is
maintained.
    2.1 What types of procedures are required for me to demonstrate
compliance? This procedure requires you to meet the requirements of
paragraphs (1) and (2) of this section.
    (1) Perform periodic accuracy audits of your CPMS; and
    (2) Take corrective action when your CPMS fails to meet the
accuracy requirements of this procedure.
    2.2 What types of recordkeeping and reporting activities are
required by Procedure 4? This procedure does not have any reporting
requirements but does require you to record and maintain data that
identify your CPMS and show the results of any performance
demonstrations of your CPMS. Recordkeeping requirements are
specified in section 14 of this procedure.

3.0 What special definitions apply to Procedure 4?

    3.1 Accuracy. A measure of the closeness of a measurement to the
true or actual value.
    3.2 Accuracy hierarchy. The ratio of the accuracy of a
measurement instrument to the accuracy of a calibrated instrument or
standard that is used to measure the accuracy of the measurement
instrument. For example, if the accuracy of a calibrated temperature
measurement device is 0.2 percent, and the accuracy of a
thermocouple is 1.0 percent, the accuracy hierarchy is 5.0 (1.0 /
0.2 = 5.0).
    3.3 Calibration drift. The difference between a reference value
and the output value of a CPMS after a period of operation during
which no unscheduled maintenance, repair, or adjustment took place.
    3.4 Conductivity CPMS. The total equipment that is used to
measure and record liquid conductivity on a continuous basis.
    3.5 Continuous parameter monitoring system (CPMS). The total
equipment that is used to measure and record parameters, such as
temperature, pressure, liquid flow rate, gas flow rate, mass flow
rate, pH or conductivity, in one or more locations on a continuous
basis.
    3.6 Differential pressure tube. A device, such as a pitot tube,
that consists of one or more pairs of tubes that are oriented to
measure the velocity pressure and static pressure at one of more
fixed points within a duct for the purpose of determining gas
velocity.
    3.7 Electronic components. The electronic signal modifier or
conditioner, transmitter, and power supply associated with a CPMS.
    3.8 Flow CPMS. The total equipment that is used to measure
liquid flow rate, gas flow rate, or mass flow rate on a continuous
basis.
    3.9 Mass flow rate. The measurement of solid, liquid, or gas
flow in units of mass per time, such as kilograms per minute or tons
per hour.
    3.10 Mechanical component. Any component of a CPMS that consists
of or includes moving parts or that is used to apply or transfer
force to another component or part of a CPMS.
    3.11 pH CPMS. The total equipment that is used to measure and
record liquid pH on a continuous basis.
    3.12 Pressure CPMS. The total equipment that is used to measure
and record the pressure of a liquid or gas at any location or the
differential pressure of a gas or liquid at any two locations on a
continuous basis.
    3.13 Resolution. The smallest detectable or legible increment of
measurement.
    3.14 Sensor. The component of a CPMS that senses the parameter
being measured (currently temperature, pressure, liquid flow rate,
gas flow rate, mass flow rate, pH, or conductivity) and generates an
output signal. Table 1 identifies the sensor components of some
commonly used CPMS.
    3.15 Solid mass flow rate. The measurement in units of mass per
time of the rate at which a solid material is processed or
transferred. Examples of solid mass flow rate are the rate at which
ore is fed to a material dryer or the rate at which powdered lime is
injected into an exhaust duct.
    3.16 Temperature CPMS. The total equipment that is used to
measure and record the temperature of a liquid or gas at any
location or the differential temperature of a gas or liquid at any
two locations on a continuous basis.
    3.17 Total equipment. The sensor, mechanical components,
electronic components, data recording, electrical wiring, and other
components of a CPMS.

4.0 Interferences [Reserved]

5.0 What do I need to know to ensure the safety of persons who perform
the accuracy audits specified in Procedure 4?

    The accuracy audits required under Procedure 4 may involve
hazardous materials, operations, site conditions, and equipment.
This QA procedure does not purport to address all of the safety
issues associated with these audits. It is the responsibility of the
user to establish appropriate safety and health practices and
determine the applicable regulatory limitations prior to performing
these audits.

6.0 What are the equipment requirements for Procedure 4?

    6.1 What types of equipment do I need for performing the
accuracy audit of my CPMS? The specific types of equipment that you
need for your CPMS accuracy audit depend on the type of CPMS, site-
specific conditions, and the method that you choose for conducting
the accuracy audit, as specified in sections 8.1 through 8.5 of this
procedure. In most cases, you will need the equipment described in
paragraphs (1) and (2) of this section.
    (1) A separate device that either measures the same parameter
that your CPMS measures, or that simulates the same electronic
signal or response that your CPMS generates, and
    (2) Any test ports, pressure taps, valves, fittings, or other
equipment required to perform the specific procedures of the
accuracy audit method that you choose, as specified in section 8.1
of this procedure.
    6.2 What are the accuracy requirements for the equipment that I
use to audit the accuracy of my CPMS? Unless you meet one of the
exceptions listed in section 6.3 of this procedure, any measurement
instrument or device that you use to conduct an accuracy audit of
your CPMS must have an accuracy that is traceable to National
Institute of Standards and Technology (NIST) standards and must have
an accuracy hierarchy of at least three. To determine if a
measurement instrument or device satisfies this accuracy hierarchy
requirement, follow the procedure described in section 12.1 of this
procedure.
    6.3 Are there any exceptions to the accuracy requirement of
section 6.2 of this procedure? There are three exceptions to the
NIST-traceable accuracy requirement specified in section 6.2, as
described in paragraphs (1) through (3) of this section.
    (1) If you perform an accuracy audit of your CPMS by comparison
to a redundant CPMS, you need not meet the NIST-traceability
requirement of section 6.2; however, the redundant CPMS must have an
accuracy equal to or better than the corresponding minimum required
accuracy specified in Table 6 of this procedure for that specific
type of CPMS.
    (2) As an alternative for the calibrated pressure measurement
device with NIST-traceable accuracy that is required in paragraphs
(2) and (4) of section 8.2 and in paragraph (4) of section 8.3 of
this specification, you can use a mercury-in-glass or water-in-glass
U-tube manometer to check the accuracy of your pressure CPMS.
    (3) When validating a flow rate CPMS using the methods specified
in paragraphs (2), (3), or (7) of section 8.3 of this specification,
the container used to collect or weigh the liquid or solid is not
required to have NIST-traceable accuracy.

7.0 What reagents or standards do I need to comply with Procedure 4?

    The specific reagents and standards needed to demonstrate
compliance with this procedure depend upon the parameter that your
CPMS measures and the method that you choose to check the accuracy
of your CPMS. Sections 8.1 through 8.5 of this procedure identify
the specific reagents and standards that you will need to conduct
accuracy audits of your CPMS.

8.0 What quality assurance and quality control measures are required by
Procedure 4 for my CPMS?

    You must perform accuracy audits, meet the accuracy requirements
of this procedure, and perform any additional checks of the CPMS as
specified in sections 8.1 through 8.9 of this procedure.
    8.1 How do I perform an accuracy audit for my temperature CPMS?
To perform the accuracy audit, you can choose one of the methods
described in paragraphs (1) through (3) of this section.
    (1) Comparison to Redundant Temperature Sensor. This method
requires your CPMS to have a primary temperature sensor and a
redundant temperature sensor. The redundant temperature sensor must
be installed adjacent to the primary temperature sensor and must be
subject to the same environment as the primary temperature sensor.
To perform the accuracy audit, record three pairs of concurrent
temperature measurements within a 24-hour period. Each pair of
concurrent measurements must consist of a temperature measurement by
each of the two temperature sensors. The minimum time interval
between any two such pairs of consecutive temperature measurements
is one hour. You must take these readings during periods when the
process or control device that is being monitored by the CPMS is
operating normally. Calculate the mean of the three values for each
temperature sensor. The mean values must agree within the minimum
required accuracy specified in Table 6 of this procedure. If your
CPMS satisfies the accuracy requirement of Table 6, the accuracy
audit is complete. If your CPMS does not satisfy the accuracy
requirement of Table 6 of this procedure, check all system
components and take any corrective action that is necessary to
achieve the required minimum accuracy. Repeat this accuracy audit
procedure until the accuracy requirement of Table 6 of this
procedure is satisfied. If you replace any electrical or mechanical
components of your temperature CPMS, you must perform the procedures
outlined in PS-17. If you are required to measure and record
temperatures at multiple locations, repeat this procedure for each
location.
    (2) Comparison to Calibrated Temperature Measurement Device.
Place the sensor of a calibrated temperature measurement device
adjacent to the sensor of your temperature CPMS in a location that
is subject to the same environment as the sensor of your temperature
CPMS. The calibrated temperature measurement device must satisfy the
accuracy requirements specified in section 6.2 of this procedure.
Allow sufficient time for the response of the calibrated temperature
measurement device to reach equilibrium. With the process or control
device that is monitored by your CPMS operating under normal
conditions, record concurrently the temperatures measured by your
temperature CPMS and the calibrated temperature measurement device.
Using the temperature measured by the calibrated measurement device
as the value for Vc, follow the procedure specified in
section 12.2 of this procedure to determine if your CPMS satisfies
the accuracy requirement of Table 6 of this procedure. If you
determine that your CPMS satisfies the accuracy requirement of Table
6 of this procedure, the accuracy audit is complete. If your CPMS
does not satisfy the accuracy requirement of Table 6 of this
procedure, check all system components and take any corrective
action that is necessary to achieve the required minimum accuracy.
Repeat this procedure until the accuracy requirement of Table 6 of
this procedure is satisfied. If you replace any electrical or
mechanical components of the primary CPMS, you must perform the
procedures outlined in PS-17 (40 CFR part 60, appendix B). If you
are required to measure and record temperatures at multiple
locations, repeat this procedure for each location.
    (3) Separate Sensor Check and System Check by Temperature
Simulation. This method applies to temperature CPMS that use either
a thermocouple or a resistance temperature detector as the
temperature sensor. First, perform the temperature sensor check
using the appropriate ASTM standard listed in Table 2 of this
procedure. To perform the system check, record the temperature using
your temperature CPMS with the process or control device that is
monitored by your temperature CPMS operating under normal
conditions. Under the same operating conditions, disconnect the
sensor from the CPMS system and connect a calibrated simulation
device that is designed to simulate the same type of response as the
CPMS sensor. The simulation device must satisfy the accuracy
requirements specified in section 6.2 of this procedure. Within 15
minutes of measuring and recording the temperature using your
temperature CPMS, simulate the same temperature recorded for the
temperature CPMS. Allow sufficient time for the response of the
simulation device to reach equilibrium. Using the temperature
simulated by the calibrated simulation device as the value for
Vc, follow the procedure specified in section 12.2 of
this procedure to determine if your CPMS satisfies the accuracy
requirement of Table 6 of this procedure. If you determine that your
CPMS satisfies the accuracy requirement of Table 6 of this
procedure, the accuracy audit is complete. If the calculated
accuracy does not meet the accuracy requirement of Table 6 of this
procedure, check all system components and take any corrective
action that is necessary to achieve the required minimum accuracy.
Repeat this procedure until the accuracy requirement of Table 6 of
this procedure is satisfied. If you replace any electrical or
mechanical components of your temperature CPMS, you must perform the
procedures outlined in PS-17. If you are required to measure and
record temperatures at multiple locations, repeat this procedure for
each location.
    8.2 How do I perform an accuracy audit for my pressure CPMS? To
perform the accuracy audit, you can choose one of the methods
described in paragraphs (1) through (4) of this section.
    (1) Comparison to redundant pressure sensor. This method
requires your CPMS to

have a primary pressure sensor and a redundant pressure sensor. The
redundant pressure sensor must be installed adjacent to the primary
pressure sensor and must be subject to the same environment as the
primary pressure sensor. To perform the accuracy audit, record three
pairs of concurrent pressure measurements within a 24-hour period.
Each pair of concurrent measurements must consist of a pressure
measurement by each of the two pressure sensors. The minimum time
interval between any two such pairs of consecutive pressure
measurements is one hour. You must take these readings during
periods when the process or control device that is being monitored
by the CPMS is operating normally. Calculate the mean of the three
values for each pressure sensor. The mean values must agree within
the minimum required accuracy specified in Table 6 of this
procedure. If your CPMS satisfies the accuracy requirement of Table
6 of this procedure, the accuracy audit is complete. If your CPMS
does not satisfy the accuracy requirement of Table 6 of this
procedure, check all system components and take any corrective
action that is necessary to achieve the required minimum accuracy.
Repeat this accuracy audit procedure until the accuracy requirement
of Table 6 of this procedure is satisfied. If you replace any
electrical or mechanical components of your pressure CPMS, you must
perform the procedures outlined in PS-17 (40 CFR part 60, appendix
B). If you are required to measure and record pressure at multiple
locations, repeat this procedure for each location.
    (2) Comparison to Calibrated Pressure Measurement Device. With
the process or control device that is monitored by your pressure
CPMS operating under normal conditions, record the pressure at each
location that is monitored by your pressure CPMS. For each pressure
monitoring location, connect the process lines from the process or
emission control device that is monitored by your pressure CPMS to a
mercury-in-glass U-tube manometer, a water-in-glass U-tube
manometer, or calibrated pressure measurement device. If a
calibrated pressure measurement device is used, the device must
satisfy the accuracy requirements of section 6.2 of this procedure.
The calibrated pressure measurement device must also have a range
equal to or greater than the range of your pressure CPMS. Perform a
leak test on all manometer or calibrated pressure measurement device
connections using the method specified in section 8.9 of this
procedure. Allow sufficient time for the response of the calibrated
pressure measurement device to reach equilibrium. Within 30 minutes
of measuring and recording the corresponding pressure using your
CPMS, record the pressure measured by the calibrated pressure
measurement device at each location. Using the pressure measured by
the calibrated pressure measurement device as the value for
Vc, follow the procedure specified in section 12.2 of
this procedure to determine if your CPMS satisfies the accuracy
requirement of Table 6 of this procedure. If you determine that your
CPMS satisfies the accuracy requirement of Table 6 of this
procedure, the accuracy audit is complete. If the calculated
accuracy does not meet the accuracy requirement of Table 6 of this
procedure, check all system components and take any corrective
action that is necessary to achieve the accuracy requirements.
Repeat this procedure until the accuracy requirement of Table 6 of
this procedure is satisfied. If you replace any electrical or
mechanical components of your pressure CPMS, you must perform the
procedures outlined in PS-17 (40 CFR part 60, appendix B). If you
are required to measure and record pressures at multiple locations,
repeat this procedure for each location.
    (3) Separate Sensor Check and System Check by Pressure
Simulation Using a Calibrated Pressure Source. Perform the pressure
sensor check using the appropriate ASTM standard listed in Table 3
of this procedure. These sensor check methods apply only to pressure
CPMS that use either a pressure gauge or a metallic-bonded
resistance strain gauge as the pressure sensor. To perform the
system check, begin by disconnecting or closing off the process line
or lines to your pressure CPMS. For each location that is monitored
by your pressure CPMS, connect a pressure source to your CPMS. The
pressure source must be calibrated and must satisfy the accuracy
requirements of section 6.2 of this procedure. The pressure source
also must be adjustable, either continuously or incrementally over
the pressure range of your pressure CPMS. Perform a leak test on the
calibrated pressure source using the method specified in section 8.9
of this procedure. Using the calibrated pressure source, apply to
each location that is monitored by your CPMS a pressure that is
within 10 percent of the normal operating pressure of
your pressure CPMS. Allow sufficient time for the response of the
calibrated pressure source to reach equilibrium. Using the pressure
applied by the calibrated pressure source as the value for
Vc, follow the procedure specified in section 12.2 of
this procedure to determine if your CPMS satisfies the accuracy
requirement of Table 6 of this procedure. If you determine that your
CPMS satisfies the accuracy requirement of Table 6 of this
procedure, the accuracy audit is complete. If your CPMS does not
meet the accuracy requirement of Table 6 of this procedure, check
all system components and take any other corrective action that is
necessary to achieve the required minimum accuracy. Repeat this
procedure until the accuracy requirement of Table 6 of this
procedure is satisfied. If you replace any electrical or mechanical
components of your pressure CPMS, you must perform the procedures
outlined in PS-17 (40 CFR part 60, appendix B). If you are required
to measure and record pressure at multiple locations, repeat this
procedure for each location.
    (4) Separate Sensor and System Check by Pressure Simulation
Procedure Using a Pressure Source and a Calibrated Pressure
Measurement Device. Perform the pressure sensor check using the
appropriate ASTM standard listed in Table 3 of this procedure. These
sensor check methods apply only to pressure CPMS that use either a
pressure gauge or a metallic-bonded resistance strain gauge as the
pressure sensor. To perform the system check, begin by disconnecting
or closing off the process line or lines to your pressure CPMS.
Attach a mercury-in-glass U-tube manometer, a water-in-glass U-tube
manometer, or a calibrated pressure measurement device (the
reference pressure measurement device) in parallel to your pressure
CPMS. If a calibrated pressure measurement device is used, the
device must satisfy the accuracy requirements of section 6.2 of this
procedure. Connect a pressure source to your pressure CPMS and the
parallel reference pressure measurement device. Perform a leak test
on all connections for the pressure source and calibrated pressure
measurement device using the method as specified in section 8.9 of
this procedure. Apply pressure to your CPMS and the parallel
reference pressure measurement device. Allow sufficient time for the
responses of your CPMS and the parallel reference pressure
measurement device to reach equilibrium. Record the pressure
measured by your pressure CPMS and the reference pressure
measurement device. Using the pressure measured by the parallel
reference pressure measurement device as the value for
Vc, follow the procedure specified in section 12.2 of
this procedure to determine if your CPMS satisfies the accuracy
requirement of Table 6 of this procedure. If you determine that your
CPMS satisfies the accuracy requirement of Table 6 of this
procedure, the accuracy audit is complete. If your CPMS does not
meet the accuracy requirement of Table 6 of this procedure, check
all system components and take any corrective action that is
necessary to achieve the required minimum accuracy. Repeat this
accuracy audit until the accuracy requirement of Table 6 of this
procedure is satisfied. If you replace any electrical or mechanical
components of your pressure CPMS, you must perform the procedures
outlined in PS-17 (40 CFR part 60, appendix B). If you are required
to measure and record pressure at multiple locations, repeat this
procedure for each location.
    8.3 How do I perform an accuracy audit for my flow CPMS? To
perform the accuracy audit on your flow CPMS, you can choose one of
the methods described in paragraphs (1) through (7) of this section
that is applicable to the type of material measured by your flow
CPMS and the type of sensor used in your flow CPMS.
    (1) Comparison to redundant flow sensor. This method requires
your CPMS to have a primary flow sensor and a redundant flow sensor.
The redundant flow sensor must be installed adjacent to the primary
flow sensor and must be subject to the same environment as the
primary flow sensor. If using two Coriolis mass flow meters, care
should be taken to avoid cross-talk, which is interference between
the two meters due to mechanical coupling. Consult the manufacturer
for specifics. To perform the accuracy audit, record three pairs of
concurrent flow measurements within a 24-hour period. Each pair of
concurrent measurements must consist of a flow measurement by each
of the two flow sensors. The minimum time interval between any two
such pairs of consecutive flow

measurements is one hour. You must take these readings during
periods when the process or control device that is being monitored
by the CPMS is operating normally. Calculate the mean of the three
values for each flow sensor. The mean values must agree within the
minimum required accuracy specified in Table 6 of this procedure. If
your CPMS satisfies the accuracy requirement of Table 6 of this
procedure, the accuracy audit is complete. If your CPMS does not
satisfy the accuracy requirement of Table 6 of this procedure, check
all system components and take any corrective action that is
necessary to achieve the required minimum accuracy. Repeat this
accuracy audit procedure until the accuracy requirement of Table 6
of this procedure is satisfied. If you replace any electrical or
mechanical components of your flow CPMS, you must perform the
procedures outlined in PS-17 (40 CFR part 60, appendix B). If you
are required to measure and record flow at multiple locations,
repeat this procedure for each location.
    (2) Volumetric Method. This method applies to any CPMS that is
designed to measure liquid flow rate. With the process or control
device that is monitored by your flow CPMS operating under normal
conditions, record the flow rate measured by your flow CPMS for the
subject process line. Collect concurrently the liquid that is
flowing through the same process line for a measured length of time
using the Volumetric Method specified in one of the standards listed
in Table 4 of this procedure. Using the flow rate measured by the
Volumetric Method as the value for Vc, follow the
procedure specified in section 12.2 of this procedure to determine
if your CPMS satisfies the accuracy requirement of Table 6 of this
procedure. If you determine that your CPMS satisfies the accuracy
requirement of Table 6 of this procedure, the accuracy audit is
complete. If your CPMS does not satisfy the accuracy requirement of
Table 6 of this procedure, check all system components and take any
corrective action that is necessary to achieve the required minimum
accuracy. Repeat this procedure until the accuracy requirement of
Table 6 of this procedure is satisfied. If you replace any
electrical or mechanical components of your flow CPMS, you must
perform the procedures outlined in PS-17 (40 CFR part 60, appendix
B). If you are required to measure and record flows at multiple
locations, repeat this procedure for each location.
    (3) Gravimetric Method. This method applies to any CPMS that is
designed to measure liquid flow rate, liquid mass flow rate, or
solid mass flow rate. With the process or control device that is
monitored by your flow CPMS operating under normal conditions,
record the flow rate measured by your flow CPMS for the subject
process line. At the same time, collect the material (liquid or
solid) that is flowing or being transferred through the same process
line for a measured length of time using the Weighing, Weigh Tank,
or Gravimetric Methods specified in the standards listed in Table 5
of this procedure. Using the flow rate measured by the Weighing,
Weigh Tank, or Gravimetric Methods as the value for Vc,
follow the procedure specified in section 12.2 of this procedure to
determine if your CPMS satisfies the accuracy requirement of Table 6
of this procedure. If you determine that your CPMS satisfies the
accuracy requirement of Table 6 of this procedure, the accuracy
audit is complete. If your CPMS does not satisfy the accuracy
requirement of Table 6 of this procedure, check all system
components and take any corrective action that is necessary to
achieve the required minimum accuracy. Repeat this procedure until
the accuracy requirement of Table 6 of this procedure is satisfied.
If you replace any electrical or mechanical components of your flow
CPMS, you must perform the procedures outlined in PS-17 (40 CFR part
60, appendix B). If you are required to measure and record flows at
multiple locations, repeat this procedure for each location.
    (4) Separate Sensor Check and System Check by Differential
Pressure Measurement Method. This method applies only to flow CPMS
that use a differential pressure measurement flow device, such as an
orifice plate, flow nozzle, or venturi tube. This method may not be
used to validate a flow CPMS that measures gas flow by means of one
or more differential pressure tubes. To perform the sensor check,
remove the flow constricting device and perform a visual inspection
for wear or other deformities based on manufacturer's
recommendations. Take any corrective action that is necessary to
ensure its proper operation. To perform the system check, record the
flow rate measured by your flow CPMS while the process or control
device that is monitored by your CPMS operating under normal
conditions. Under the same operating conditions, disconnect the
pressure taps from your flow CPMS and connect the pressure taps to a
mercury-in-glass U-tube manometer, a water-in-glass U-tube
manometer, or calibrated differential pressure measurement device.
If a calibrated pressure measurement device is used, the device must
satisfy the accuracy requirements of section 6.2 of this procedure.
Perform a leak test on all manometer or calibrated differential
pressure measurement device connections using the method specified
in section 8.9 of this procedure. Allow sufficient time for the
response of the calibrated differential pressure measurement device
to reach equilibrium. Within 30 minutes of measuring and recording
the flow rate using your CPMS, record the pressure drop measured by
the calibrated differential pressure measurement device. Using the
manufacturer's literature or the procedures specified in ASME MFC-
3M-2004 (incorporated by reference--see Sec.  60.17), calculate the
flow rate that corresponds to the differential pressure measured by
the calibrated differential pressure measurement device. For CPMS
that use an orifice flow meter, the procedures specified in ASHRAE
41.8-1989 (incorporated by reference--see Sec.  60.17) also can be
used to calculate the flow rate. Using the calculated flow rate as
the value for Vc, follow the procedure specified in
section 12.2 of this procedure to determine if your CPMS satisfies
the accuracy requirement of Table 6 of this procedure. If you
determine that your CPMS satisfies the accuracy requirement of Table
6 of this procedure, the accuracy audit is complete. If your CPMS
does not satisfy the accuracy requirement of Table 6 of this
procedure, check all system components and take any corrective
action that is necessary to achieve the required minimum accuracy.
Repeat this procedure until the accuracy requirement of Table 6 of
this procedure is satisfied. If you replace any electrical or
mechanical components of your flow CPMS, you must perform the
procedures outlined in PS-17 (40 CFR part 60, appendix B). If you
are required to measure and record flows at multiple locations,
repeat this procedure for each location.
    (5) Separate Sensor Check and System Check by Pressure Source
Flow Simulation Method. This method applies only to flow CPMS that
use a differential pressure measurement flow device, such as an
orifice plate, flow nozzle, or venturi tube. This method may not be
used to validate a flow CPMS that measures gas flow by means of one
or more differential pressure tubes. To perform the sensor check,
remove the flow constricting device and perform a visual inspection
for wear or other deformities based on manufacturer's
recommendations. Take any corrective action that is necessary to
ensure its proper operation. To perform the system check, connect
separate pressure sources to the upstream and downstream sides of
your pressure CPMS, where the pressure taps are normally connected.
The pressure sources must be calibrated and must satisfy the
accuracy requirements of section 6.2 of this procedure. The pressure
sources also must be adjustable, either continuously or
incrementally over the pressure range that corresponds to the range
of your flow CPMS. Perform a leak test on all connections between
the calibrated pressure sources and your flow CPMS using the method
specified in section 8.9 of this procedure. Using the manufacturer's
literature or the procedures specified in ASME MFC-3M-2004
(incorporated by reference-see Sec.  60.17), calculate the required
pressure drop that corresponds to the normal operating flow rate
expected for your flow CPMS. For CPMS that use an orifice flow
meter, the procedures specified in ASHRAE 41.8-1989 (incorporated by
reference-see Sec.  60.17) also can be used to calculate the
pressure drop. Use the calibrated pressure sources to apply the
calculated pressure drop to your flow CPMS. Allow sufficient time
for the responses of the calibrated pressure sources to reach
equilibrium. Record the flow rate measured by your flow CPMS. Using
the flow rate measured by your CPMS when the calculated pressure
drop was applied as the value for Vc, follow the procedure specified
in section 12.2 of this procedure to determine if your CPMS
satisfies the accuracy requirement of Table 6 of this procedure. If
you determine that your CPMS satisfies the accuracy requirement of
Table 6 of this procedure, the accuracy audit is complete. If your
CPMS does not satisfy the accuracy requirement of Table 6 of this
procedure, check all system components and take any corrective
action that is necessary to achieve the required minimum accuracy.
Repeat this accuracy audit until the accuracy

requirement of Table 6 of this procedure is satisfied. If you
replace any electrical or mechanical components of your flow CPMS,
you must perform the procedures outlined in PS-17 (40 CFR part 60,
appendix B). If you are required to measure and record flows at
multiple locations, repeat this procedure for each location.
    (6) Relative Accuracy (RA) Test. This method applies to any flow
CPMS that measures gas flow rate. If your flow CPMS uses a
differential pressure tube as the flow sensor and does not include
redundant sensors, you must use this method to validate your flow
CPMS. The reference methods (RM's) applicable to this test are
Methods 2, 2A, 2B, 2C, 2D, and 2F in 40 CFR part 60, appendix A-1,
and Method 2G in 40 CFR part 60, appendix A-2. Conduct three sets of
RM tests. Mark the beginning and end of each RM test period on the
flow CPMS chart recordings or other permanent record of output.
Determine the integrated flow rate for each RM test period. Perform
the same calculations specified by PS-2 (40 CFR part 60, appendix
B), section 7.5. If the RA is no greater than 20 percent of the mean
value of the RM test data, the RA test is complete. If the RA is
greater than 20 percent of the mean value of the RM test data, check
all system components and take any corrective action that is
necessary to achieve the required RA. Repeat this RA test until the
RA requirement of this section is satisfied.
    (7) Material Weight Comparison Method. This method applies to
any solid mass flow CPMS that uses a combination of a belt conveyor
and scale and includes a totalizer. To conduct this test, pass a
quantity of pre-weighed material over the belt conveyor in a manner
consistent with actual loading conditions. To weigh the test
quantity of material that is to be used during the accuracy audit,
you must use a scale that satisfies the accuracy requirements of
section 6.2 of this procedure. The test quantity must be sufficient
to challenge the conveyor belt-scale system for at least three
revolutions of the belt. Record the length of the test. Calculate
the mass flow rate using the measured weight and the recorded time.
Using this mass flow rate as the value for Vc, follow the procedure
specified in section 12.2 of this procedure to determine if your
CPMS satisfies the accuracy requirement of Table 6 of this
procedure. If your CPMS satisfies the accuracy requirement of Table
6 of this procedure, the accuracy audit is complete. If your CPMS
does not satisfy the accuracy requirement of Table 6 of this
procedure, check all system components and take any corrective
action that is necessary to achieve the required minimum accuracy.
Repeat this accuracy audit procedure until the accuracy requirement
of Table 6 of this procedure is satisfied. If you replace any
electrical or mechanical components of your flow CPMS, you must
perform the procedures outlined in PS-17 (40 CFR part 60, appendix
B). If you are required to measure and record flow at multiple
locations, repeat this procedure for each location.
    8.4 How do I perform an accuracy audit for my pH CPMS? To
perform the accuracy audit, you can choose one of the methods
described in paragraphs (1) through (3) of this section.
    (1) Comparison to redundant pH sensor. This method requires your
CPMS to have a primary pH sensor and a redundant pH sensor. The
redundant pH sensor must be installed adjacent to the primary pH
sensor and must be subject to the same environment as the primary pH
sensor. To perform the accuracy audit, concurrently record the pH
measured by the two pH sensors. You must take these readings during
periods when the process or control device that is being monitored
by the CPMS is operating normally. The two pH values must agree
within the minimum required accuracy specified in Table 6 of this
procedure. If your CPMS satisfies the accuracy requirement of Table
6 of this procedure, the accuracy audit is complete. If your CPMS
does not satisfy the accuracy requirement of Table 6 of this
procedure, check all system components and take any corrective
action that is necessary to achieve the required minimum accuracy.
Repeat this accuracy audit procedure until the accuracy requirement
of Table 6 of this procedure is satisfied. If you replace any
electrical or mechanical components of your pH CPMS, you must
perform the procedures outlined in PS-17 (40 CFR part 60, appendix
B). If you are required to measure and record pH at multiple
locations, repeat this procedure for each location.
    (2) Comparison to Calibrated pH Meter. Place a calibrated pH
measurement device adjacent to your pH CPMS so that the calibrated
test device is subjected to the same environment as your pH CPMS.
The calibrated pH measurement device must satisfy the accuracy
requirements specified in section 6.2 of this procedure. Allow
sufficient time for the response of the calibrated pH measurement
device to reach equilibrium. With the process or control device that
is monitored by your CPMS operating under normal conditions, record
concurrently the pH measured by your pH CPMS and the calibrated pH
measurement device. If concurrent pH readings are not possible,
extract a sufficiently large sample from the process stream and
perform measurements using a portion of the sample for each meter.
Using the pH measured by the calibrated pH measurement device as the
value for Vc, follow the procedure specified in section 12.2 of this
procedure to determine if your CPMS satisfies the accuracy
requirement of Table 6 of this procedure. If you determine that your
CPMS satisfies the accuracy requirement of Table 6, the accuracy
audit is complete. If your CPMS does not satisfy the accuracy
requirement of Table 6 of this procedure, check all system
components and take any corrective action that is necessary to
achieve the required minimum accuracy. Repeat this procedure until
the accuracy requirement of Table 6 of this procedure is satisfied.
If you replace any electrical or mechanical components of the
primary CPMS, you must perform the procedures outlined in PS-17 (40
CFR part 60, appendix B). If you are required to measure and record
pH at multiple locations, repeat this procedure for each location.
    (3) Single Point Calibration. This method requires the use of a
certified buffer solution. All buffer solutions used must be
certified by NIST and accurate to 0.02 pH units at 25
[deg]C (77 [deg]F). Set the temperature on your pH meter to the
temperature of the buffer solution, typically room temperature or 25
[deg]C (77 [deg]F). If your pH meter is equipped with automatic
temperature compensation, activate this feature before calibrating.
Set your pH meter to measurement mode. Place the clean electrodes
into the container of fresh buffer solution. If the expected pH of
the process fluid lies in the acidic range (less than 7 pH), use a
buffer solution with a pH value of 4.00. If the expected pH of the
process fluid lies in the basic range (greater than 7 pH), use a
buffer solution with a pH value of 10.00. Allow sufficient time for
the response of your CPMS to reach equilibrium. Record the pH
measured by your CPMS. Using the buffer solution pH as the value for
Vc, follow the procedure specified in section 12.2 of
this procedure to determine if your CPMS satisfies the accuracy
requirement of Table 6 of this procedure. If you determine that your
CPMS satisfies the accuracy requirement of Table 6 of this
procedure, the accuracy audit is complete. If your CPMS does not
satisfy the accuracy requirement of Table 6 of this procedure,
calibrate your pH CPMS using the procedures specified in the
manufacturer's owner's manual. If the manufacturer's owner's manual
does not specify a two-point calibration procedure, you must perform
a two-point calibration procedure based on ASTM D 1293-99 (2005)
(incorporated by reference--see Sec.  60.17). If you replace any
electrical or mechanical components of your pH CPMS, you must
perform the procedures outlined in PS-17 (40 CFR part 60, appendix
B). If you are required to measure and record pH at multiple
locations, repeat this procedure for each location. If you are
required to measure and record pH at multiple locations, repeat this
procedure for each location.
    8.5 How do I perform an accuracy audit for my conductivity CPMS?
To perform the accuracy audit, you can choose one of the methods
described in paragraphs (1) through (3) of this section.
    (1) Comparison to Redundant Conductivity Sensor. This method
requires your CPMS to have a primary conductivity sensor and a
redundant conductivity sensor. The redundant conductivity sensor
must be installed adjacent to the primary conductivity sensor and
must be subject to the same environment as the primary conductivity
sensor. To perform the accuracy audit, concurrently record the
conductivity measured by the two conductivity sensors. You must take
these readings during periods when the process or control device
that is being monitored by the CPMS is operating normally. The two
conductivity values must agree within the minimum required accuracy
specified in Table 6 of this procedure. If your CPMS satisfies the
accuracy requirement of Table 6 of this procedure, the accuracy
audit is complete. If your CPMS does not satisfy the accuracy
requirement of Table 6 of this procedure, check all system
components and take any corrective action that is necessary to
achieve the required minimum accuracy. Repeat this accuracy audit
procedure until the accuracy requirement of Table 6 of this

procedure is satisfied. If you replace any electrical or mechanical
components of your conductivity CPMS, you must perform the
procedures outlined in PS-17 (40 CFR part 60, appendix B). If you
are required to measure and record conductivity at multiple
locations, repeat this procedure for each location.
    (2) Comparison to Calibrated Conductivity Meter. Place a
calibrated conductivity measurement device adjacent to your
conductivity CPMS so that the calibrated test device is subjected to
the same environment as your conductivity CPMS. The calibrated
conductivity measurement device must satisfy the accuracy
requirements specified in section 6.2 of this procedure. Allow
sufficient time for the response of the calibrated conductivity
measurement device to reach equilibrium. With the process or control
device that is monitored by your CPMS operating under normal
conditions, record concurrently the conductivity measured by your
conductivity CPMS and the calibrated conductivity measurement
device. If concurrent conductivity readings are not possible,
extract a sufficiently large sample from the process stream and
perform measurements using a portion of the sample for each meter.
Using the conductivity measured by the calibrated conductivity
measurement device as the value for Vc, follow the
procedure specified in section 12.2 of this procedure to determine
if your CPMS satisfies the accuracy requirement of Table 6 of this
procedure. If you determine that your CPMS satisfies the accuracy
requirement of Table 6 of this procedure, the accuracy audit is
complete. If your CPMS does not satisfy the accuracy requirement of
Table 6 of this procedure, check all system components and take any
corrective action that is necessary to achieve the required minimum
accuracy. Repeat this procedure until the accuracy requirement of
Table 6 of this procedure is satisfied. If you replace any
electrical or mechanical components of the primary CPMS, you must
perform the procedures outlined in PS-17 (40 CFR part 60, appendix
B). If you are required to measure and record conductivity at
multiple locations, repeat this procedure for each location.
    (3) Single Point Calibration. This method requires the use of a
certified conductivity standard solution. All conductivity standard
solutions used must be certified by NIST and accurate within 2 percent micromhos per centimeter ([mu]mhos/cm) (2 percent microsiemens per centimeter [mu]S/cm)) at 25 [deg]C
(77 [deg]F). Choose a conductivity standard solution that is close
to the measuring range for best results. Since conductivity is
dependent on temperature, the conductivity tester should have an
integral temperature sensor that adjusts the reading to a standard
temperature, usually 25 [deg]C (77 [deg]F). If the conductivity
meter allows for manual temperature compensation, set this value to
25 [deg]C (77 [deg]F). Place the clean electrodes into the container
of fresh conductivity standard solution. Allow sufficient time for
the response of your CPMS to reach equilibrium. Record the
conductivity measured by your CPMS. Using the conductivity standard
solution as the value for VC, follow the procedure
specified in section 12.2 of this procedure to determine if your
CPMS satisfies the accuracy requirement of Table 6 of this
procedure. If you determine that your CPMS satisfies the accuracy
requirement of Table 6 of this procedure, the accuracy audit is
complete. If your CPMS does not satisfy the accuracy requirement of
Table 6 of this procedure, calibrate your conductivity CPMS using
the procedures specified in the manufacturer's owner's manual. If
the manufacturer's owner's manual does not specify a calibration
procedure, you must perform a calibration procedure based on ASTM D
1125-95 (2005) or ASTM D 5391-99 (2005) (incorporated by reference--
see Sec.  60.17). If you replace any electrical or mechanical
components of your conductivity CPMS, you must perform the
procedures outlined in PS-17 (40 CFR part 60, appendix B). If you
are required to measure and record conductivity at multiple
locations, repeat this procedure for each location.
    8.6 Are there any acceptable alternative procedures for
evaluating my CPMS? You may use alternative procedures for
evaluating the operation of your CPMS if the alternative procedures
are approved by the Administrator.
    8.7 How often must I perform an accuracy audit of my CPMS?
Depending on the parameter measured (temperature, pressure, flow,
pH, or conductivity), you must perform the accuracy audits according
to the frequencies specified in paragraphs (1) and (2) of this
section.
    (1) Temperature, Pressure, Flow, and Conductivity. If your CPMS
measures temperature, pressure, flow rate, or conductivity, you must
perform an accuracy audit of your CPMS at least quarterly using the
procedures specified in sections 8.1 through 8.3 and 8.5,
respectively, of this procedure. You also must perform within 48
hours an accuracy audit of your CPMS following any periods of at
least 24 hours in duration throughout which:
    (i) The value of the measured parameter exceeded the maximum
rated operating limit of the sensor, as specified in the
manufacturer's owner's manual, or
    (ii) The value of the measured parameter remained off the scale
of the CPMS data recording system.
    (2) pH. If your CPMS measures pH, you must perform an accuracy
audit of your pH CPMS at least weekly using the procedures specified
in section 8.4 of this procedure.
    8.8 What other checks must I do on my CPMS? According to the
parameter being measured (temperature, pressure, flow, pH, or
conductivity), you must perform the additional checks specified in
paragraphs (1) through (4) of this section.
    (1) Temperature. If your temperature CPMS is not equipped with a
redundant temperature sensor, at least quarterly, perform a visual
inspection of all components of your temperature CPMS for physical
and operational integrity and all electrical connections for
oxidation and galvanic corrosion. You must take necessary corrective
action to replace or repair any damaged components as soon as
possible.
    (2) Pressure. At least monthly, check all mechanical connections
for leakage. If your pressure CPMS is not equipped with a redundant
pressure sensor, at least quarterly, perform a visual inspection of
all components of the pressure CPMS for physical and operational
integrity and all electrical connections for oxidation and galvanic
corrosion. You must take necessary corrective action to replace or
repair any damaged components as soon as possible.
    (3) Flow Rate. At least monthly, check all mechanical
connections for leakage. If your flow CPMS is not equipped with a
redundant flow sensor, at least quarterly, perform a visual
inspection of all components of the flow CPMS for physical and
operational integrity and all electrical connections for oxidation
and galvanic corrosion. You must take necessary corrective action to
replace or repair any damaged components as soon as possible.
    (4) pH. If your pH CPMS is not equipped with a redundant sensor,
at least monthly, perform a visual inspection of all components of
the pH CPMS for physical and operational integrity and all
electrical connections for oxidation and galvanic corrosion. You
must take necessary corrective action to replace or repair any
damaged components as soon as possible.
    (5) Conductivity. If your conductivity CPMS is not equipped with
a redundant sensor, at least quarterly, perform a visual inspection
of all components of the conductivity CPMS for physical and
operational integrity and all electrical connections for oxidation
and galvanic corrosion. You must take necessary corrective action to
replace or repair any damaged components as soon as possible.
    8.9 How do I perform a leak test on pressure connections, as
required by this procedure? You can satisfy the leak test
requirements of sections 8.2 and 8.3 of this procedure by following
the procedures specified in paragraphs (1) through (3) of this
section.
    (1) For each pressure connection, apply a pressure that is equal
to the highest pressure the connection is likely to be subjected to
or 0.24 kilopascals (1.0 inch of water column), whichever is
greater.
    (2) Close off the connection between the applied pressure source
and the connection that is being leak-tested.
    (3) If the applied pressure remains stable for at least 15
seconds, the connection is considered to be leak tight. If the
applied pressure does not remain stable for at least 15 seconds,
take any corrective action necessary to make the connection leak
tight and repeat this leak test procedure.

9.0 What quality control measures are required by this procedure for my
CPMS?

    You must develop and implement a QA/QC program for your CPMS
according to section 9.1 of this procedure. You must also maintain
written QA/QC procedures for your CPMS.
    9.1 What elements must be covered by my QA/QC program? Your QA/
QC program must address, at a minimum, the elements listed in
paragraphs (1) through (5) of this section.
    (1) Accuracy audit procedures for the CPMS sensor;

    (2) Calibration procedures, including procedures for assessing
and adjusting the calibration drift (CD) of the CPMS;
    (3) Preventive maintenance of the CPMS (including a spare parts
inventory);
    (4) Data recording, calculations, and reporting; and
    (5) Corrective action for a malfunctioning CPMS.
    9.1 How long must I maintain written QA/QC procedures for my
CPMS? You are required to keep written QA/QC procedures on record
and available for inspection by the enforcement agency for the life
of your CPMS or until you are no longer subject to the requirements
of this procedure.

10.0 Calibration and Standardization [Reserved]

11.0 Analytical Procedure [Reserved]

12.0 What calculations are needed?

    The calculations needed to comply with this procedure are
described in sections 12.1 and 12.2 of this procedure.
    12.1 How do I determine if a calibrated measurement device
satisfies the accuracy hierarchy specified in section 6.2 of this
procedure? To determine if a calibrated measurement device satisfies
the accuracy hierarchy requirement, follow the procedure described
in paragraphs (1) and (2) of this section.
    (1) Calculate the accuracy hierarchy (Ah) using
Equation 4-1.
[GRAPHIC] [TIFF OMITTED] TP09OC08.013

Where:

Ah = Accuracy hierarchy, dimensionless.
Ar = Required accuracy (Ap or Av)
specified in Table 6 of this procedure, percent or units of
parameter value (e.g., degrees Celsius, kilopascals, liters per
minute, pH units).
Ac = Accuracy of calibrated measurement device, same
units as Ar.

    (2) If the accuracy hierarchy (Ah) is equal to or
greater than 3.0, the calibrated measurement device satisfies the
accuracy hierarchy of section 6.2 of this procedure.
    12.2 How do I determine if my CPMS satisfies the accuracy
requirement of Procedure 4? To determine if your CPMS satisfies the
accuracy requirement of this procedure, follow the procedure
described in paragraphs (1) through (4) of this section.
    (1) If your CPMS measures temperature, pressure, or flow rate,
calculate the accuracy percent value (Apv) using Equation
4-2. If your CPMS measures pH, proceed to paragraph (2) of this
section.
[GRAPHIC] [TIFF OMITTED] TP09OC08.014

Where:

Apv = Accuracy percent value, units of parameter measured
(e.g., degrees Celsius, kilopascals, liters per minute).
Vc = Parameter value measured by the calibrated
measurement device or measured by your CPMS when a calibrated signal
simulator is applied to your CPMS during the initial validation
check, units of parameter measured (e.g., degrees Celsius,
kilopascals, liters per minute).
Ap = Accuracy percentage specified in Table 6 that
corresponds to your CPMS, percent.

    (2) If your CPMS measures temperature, pressure, conductivity,
or flow rate other than mass flow rate or steam flow rate, compare
the accuracy percent value (Apv) to the accuracy value
(Av) specified in Table 6 of this procedure and select
the greater of the two values. Use this greater value as the
allowable deviation (da) in paragraph (4) of this
section.
    (3) If your CPMS measures pH, use the accuracy value
(Av) specified in Table 6 of this procedure as the
allowable deviation (da).
    (4) If your CPMS measures steam flow rate, mass flow rate, or
conductivity, use the accuracy percent value (Apv)
calculated using Equation 2 as the allowable deviation
(da).
    (5) Using Equation 4-3, calculate the measured deviation
(dm), which is the absolute value of the difference
between the parameter value measured by the calibrated device
(Vc) and the value measured by your CPMS (Vm).
[GRAPHIC] [TIFF OMITTED] TP09OC08.015

Where:

dm = Measured deviation, units of the parameter measured
(e.g., degrees Celsius, kilopascals, liters per minute).
Vc = Parameter value measured by the calibrated
measurement device or measured by your CPMS when a calibrated signal
simulator is applied to your CPMS during the initial validation
check, units of parameter measured (e.g., degrees Celsius,
kilopascals, liters per minute).
Vm = Parameter value measured by your CPMS during the
initial validation check, units of parameter measured (e.g., degrees
Celsius, kilopascals, liters per minute).

    (6) Compare the measured deviation (dm) to the
allowable deviation (da). If the measured deviation is
less than or equal to the allowable deviation, your CPMS satisfies
the accuracy requirement of this procedure.

13.0 What performance criteria must I demonstrate for my CPMS to comply
with this quality assurance procedure?

    You must demonstrate that your CPMS meets the applicable
accuracy requirements specified in Table 6 of this procedure.

14.0 What are the recordkeeping requirements for Procedure 4?

    You must satisfy the recordkeeping requirements specified in
sections 14.1 and 14.2 of this procedure.
    14.1 What data does this procedure require me to record for my
CPMS? You must record the results of all CPMS accuracy audits and a
summary of all corrective actions taken to return your CPMS to
normal operation.
    14.2 For how long must I maintain the QA data that this
procedure requires me to record for my CPMS? You are required to
keep the records required by this procedure for your CPMS for a
period of 5 years. At a minimum, you must maintain the most recent 2
years of data onsite and available for inspection by the enforcement
agency.

15.0 Pollution Prevention [Reserved]

16.0 Waste Management [Reserved]

17.0 Which references are relevant to Procedure 4?

    1. Technical Guidance Document: Compliance Assurance Monitoring.
U.S. Environmental Protection Agency, Office of Air Quality Planning
and Standards, Emission Measurement Center. August 1998. (http://
www.epa.gov/ttn/emc/cam.html).
    2. NEMA Standard Publication 250. ``Enclosures for Electrical
Equipment, 1000 Volts Maximum''.
    3. ASTM E-220-07e1: ``Standard Test Methods for Calibration of
Thermocouples by Comparison Techniques''. American Society for
Testing and Materials. 2007.
    4. ISA-MC96-1-1982: ``Temperature Measurement Thermocouples''.
American National Standards Institute. August 1982.
    5. The pH and Conductivity Handbook. Omega Engineering, Inc.
1995.
    6. ASTM E-452-02 (2007): ``Standard Test Method for Calibration
of Refractory Metal Thermocouples Using an Optical Pyrometer''.
American Society for Testing and Materials. 2002.
    7. ASTM E 644-06: ``Standard Test Methods for Testing Industrial
Resistance Thermometers''. American Society for Testing and
Materials. 2006.
    8. ASME B 40.100-2005: ``Pressure Gauges and Gauge
Attachments''. American Society of Mechanical Engineers. February
2005.
    9. ASTM E 251-92 (2003): ``Standard Test Methods for Performance
Characteristics of Metallic Bonded Resistance Strain Gages''.
American Society for Testing and Materials. 2003.
    10. ANSI/ASME MFC-3M-2004: ``Measurement of Fluid Flow in Pipes
Using Orifice, Nozzle, and Venturi''. American Society of Mechanical
Engineers. 1989 (Reaffirmed 1995).
    11. ANSI/ASME MFC-9M-1988: ``Measurement of Liquid Flow in
Closed Conduits by Weighing Method''. American Society of Mechanical
Engineers. 1989.
    12. ASHRAE 41.8-1989: ``Standard Methods of Measurement of Flow
of Liquids in Pipes Using Orifice Flow Meters''. American Society of
Heating, Refrigerating and Air-Conditioning Engineers, Inc. 1989.
    13. ISA RP 16.6-1961: ``Methods and Equipment for Calibration of
Variable Area Meters (Rotameters)''. Instrumentation, Systems, and
Automation Society. 1961.
    14. ANSI/ISA-RP31.1-1977: ``Specification, Installation, and
Calibration of Turbine Flow Meters''. Instrumentation, Systems, and
Automation Society. 1977.
    15. ISO 8316:1987: ``Measurement of Liquid Flow in Closed
Conduits--Method by Collection of Liquid in a Volumetric Tank''.
International Organization for Standardization. 1987.
    16. NIST Handbook 44--2002 Edition: ``Specifications,
Tolerances, And Other

Technical Requirements for Weighing and Measuring Devices, as
adopted by the 86th National Conference on Weights and Measures
2001'', Section 2.21: ``Belt-Conveyor Scale Systems''.
    17. ISO 10790:1999: ``Measurement of Fluid Flow in Closed
Conduits--Guidance to the Selection, Installation, and Use of
Coriolis Meters (Mass Flow, Density and Volume Flow Measurements''.
International Organization for Standardization. 1999.
    18. ASTM D 1125-95 (2005): ``Standard Test Methods for
Electrical Conductivity and Resistivity of Water''. American Society
for Testing and Materials. 2005.
    19. ASTM D 5391-99 (2005): ``Standard Test Method for Electrical
Conductivity and Resistivity of a Flowing High Purity Water
Sample''. American Society for Testing and Materials. 2005.

18.0 What tables are relevant to Procedure 4?

            Table 1--Sensor Components of Commonly Used CPMS
------------------------------------------------------------------------
For a CPMS that measures . . .                      The sensor component
                                  Using a . . .    consists of the . . .
------------------------------------------------------------------------
1. Temperature................  a. Thermocouple..  Thermocouple.
                                b. Resistance      (RTD).
                                 temperature
                                 detector.
                                c. Optical         Optical assembly and
                                 pyrometer.         detector.
                                d. Thermistor....  Thermistor.
                                e. Temperature     Integrated circuit
                                 transducer.        sensor?
2. Pressure...................  a. Pressure gauge  Gauge assembly,
                                                    including bourdon
                                                    element, bellows
                                                    element, or
                                                    diaphragm.
                                b. Pressure        Strain gauge
                                 transducer.        assembly,
                                                    capacitance
                                                    assembly, linear
                                                    variable
                                                    differential
                                                    transformer, force
                                                    balance assembly,
                                                    potentiometer,
                                                    variable reluctance
                                                    assembly,
                                                    piezoelectric
                                                    assembly, or
                                                    piezoresistive
                                                    assembly.
                                c. Manometer.....  U-tube or
                                                    differential
                                                    manometer.
3. Flow rate..................  a. Differential    Flow constricting
                                 pressure device.   element (nozzle,
                                                    Venturi, or orifice
                                                    plate) and
                                                    differential
                                                    pressure sensor.
                                b. Differential    Pitot tube, or other
                                 pressure tube.     array of tubes that
                                                    measure velocity
                                                    pressure and static
                                                    pressure, and
                                                    differential
                                                    pressure sensor.
                                c. Magnetic flow   Magnetic coil
                                 meter.             assembly.
                                d. Positive        Piston, blade, vane,
                                 displacement       propeller, disk, or
                                 flow meter.        gear assembly.
                                e. Turbine flow    Rotor or turbine
                                 meter.             assembly.
                                f. Vortex          Vortex generating and
                                 formation flow     sensing elements.
                                 meter.
                                g. Fluidic         Feedback passage,
                                 oscillating flow   side wall, control
                                 meter.             port, and thermal
                                                    sensor.
                                h. Ultrasonic      Sonic transducers,
                                 flow meter.        receivers, timer,
                                                    and temperature
                                                    sensor.
                                i. Thermal flow    Thermal element and
                                 meter.             temperature sensors.
                                j. Coriolis mass   U-tube and magnetic
                                 flow meter.        sensing elements.
                                k. Rotameter.....  Float assembly.
                                l. Solids flow     Sensing plate.
                                 meter.
                                m. Belt conveyor.  Scale.
4. pH.........................  pH meter.........  Electrode.
5. Conductivity...............  Conductivity       Electrode.
                                 meter.
------------------------------------------------------------------------

                                  Table 2--Methods for Temperature Sensor Check
----------------------------------------------------------------------------------------------------------------
  If the temperature sensor in your                             You can perform the accuracy audit of the sensor
           CPMS is a . . .               And is used in . . .                      using . . .
----------------------------------------------------------------------------------------------------------------
1. Thermocouple......................  Any application........  ASTM E220-07e1.
2. Thermocouple......................  A reducing environment.  ASTM E452-02 (2007).
3. Resistance temperature detector...  Any application........  ASTM E644-06.
----------------------------------------------------------------------------------------------------------------

               Table 3--Methods for Pressure Sensor Check
------------------------------------------------------------------------
 If the pressure sensor in your CPMS is    You can perform the accuracy
                a . . .                  audit of the sensor using . . .
------------------------------------------------------------------------
1. Pressure gauge......................  ASME B40.100-2005.
2. Metallic bonded resistance strain     ASTM E251-92 (2003).
 gauge.
------------------------------------------------------------------------

       Table 4--Volumetric Methods for Flow Meter Accuracy Audits
------------------------------------------------------------------------
            Designation                             Title
------------------------------------------------------------------------
1. ISA RP 16.6-1961...............  Methods and Equipment for
                                     Calibration of Variable Area Meters
                                     (Rotameters).
2. ANSI/ISA RP 31.1-1977..........  Specification, Installation, and
                                     Calibration of Turbine Flow Meters.
3. ISO 10790:1999.................  Measurement of Fluid Flow in Closed
                                     Conduits-Guidance to the Selection,
                                     Installation and Use of Coriolis
                                     Meters (Mass Flow, Density and
                                     Volume Flow Measurements).
4. ISO 8316:1987..................  Measurement of Liquid Flow in Closed
                                     Conduits-Method by Collection of
                                     Liquid in a Volumetric Tank.
------------------------------------------------------------------------

        Table 5--Weighing Methods for Flow Meter Accuracy Audits
------------------------------------------------------------------------
            Designation                             Title
------------------------------------------------------------------------
1. ASHRAE 41.8-1989...............  Standard Methods of Measurement of
                                     Flow of Liquids in Pipes Using
                                     Orifice Flow Meters.

2. ISA RP 16.6-1961...............  Methods and Equipment for
                                     Calibration of Variable Area Meters
                                     (Rotameters).
3. ANSI/ISA RP 31.1-1977..........  Specification, Installation, and
                                     Calibration of Turbine Flow Meters.
4. NIST Handbook 44-2002 Edition,   Specifications, Tolerances, And
 Section 2.21.                       Other Technical Requirements for
                                     Weighing and Measuring Devices, as
                                     adopted by the 86th National
                                     Conference on Weights and Measures
                                     2001: Belt-Conveyor Scale Systems.
5. ANSI/ASME MFC-9M-1988..........  Measurement of Liquid Flow in Closed
                                     Conduits by Weighing Method.
------------------------------------------------------------------------

                   Table 6--CPMS Accuracy Requirements
------------------------------------------------------------------------
                                     You must demonstrate that your CPMS
    If your CPMS measures . . .             operates within . . .
------------------------------------------------------------------------
1. Temperature, in a non-cryogenic  An accuracy percentage (Ap) of 1.0 percent of the
                                     temperature measured in degrees
                                     Celsius or within an accuracy value
                                     (Av) of 2.8 degrees Celsius (5
                                     degrees Fahrenheit), whichever is
                                     greater.
2. Temperature, in a cryogenic      An accuracy percentage (Ap) of 2.5 percent of the
                                     temperature measured in degrees
                                     Celsius or within an accuracy value
                                     (Av) of 2.8 degrees Celsius (5
                                     degrees Fahrenheit), whichever is
                                     greater.
3. Pressure.......................  An accuracy percentage (Ap) of 5 percent or an accuracy
                                     value (Av) of 0.12 kilopascals (0.5
                                     inches of water column), whichever
                                     is greater.
4. Liquid flow rate...............  An accuracy percentage (Ap) of 5 percent or an accuracy
                                     value (Av) of 1.9 liters per minute
                                     (0.5 gallons per minute), whichever
                                     is greater.
5. Gas flow rate..................  a. A relative accuracy of 20 percent, if you
                                     demonstrate compliance using the
                                     relative accuracy test, or
                                    b. An accuracy percentage (Ap) of
                                     10 percent, if your
                                     CPMS measures steam flow rate, or
                                    c. An accuracy percentage (Ap) of
                                     5 percent or an
                                     accuracy value (Av) of 280 liters
                                     per minute (10 cubic feet per
                                     minute), whichever is greater, for
                                     all other gases and accuracy audit
                                     methods.
6. Mass flow rate.................  An accuracy percentage (Ap) of 5 percent.
7. pH.............................  An accuracy value (Av) of 0.2 pH units.
8. Conductivity...................  An accuracy percentage (Ap) of 5 percent.
------------------------------------------------------------------------

PART 61--[AMENDED]

    6. The authority citation for part 61 continues to read as follows:

    Authority: 42 U.S.C. 7401, et seq.

Subpart A--[Amended]

    7. Section 61.14 is amended by redesignating paragraph (a) as
paragraph (a)(1) and adding paragraph (a)(2) to read as follows:

Sec.  61.14  Monitoring requirements.

    (a)(1) * * *
    (2) Performance specifications for continuous parameter
monitoring systems (CPMS) promulgated under 40 CFR part 60, appendix
B and quality assurance procedures for CPMS promulgated under 40 CFR
part 60, appendix F apply instead of the requirements for CPMS
specified in an applicable subpart upon promulgation of the
performance specifications and quality assurance procedures for
CPMS.
* * * * *

PART 63--[AMENDED]

    8. The authority citation for part 63 continues to read as
follows:

    Authority: 42 U.S.C. 7401, et seq.

Subpart A--[Amended]

    9. Section 63.8 is amended by:
    a. Revising paragraph (a)(2);
    b. Revising paragraph (c)(2)(i);
    c. Revising paragraph (c)(4) introductory text and adding
paragraph (c)(4)(iii);
    d. Revising paragraphs (c)(6) and (c)(7)(i);
    e. Revising paragraph (d)(2)(ii); and
    f. Revising paragraphs (e)(2), (e)(3)(i), and (e)(4).
    The revisions and additions read as follows:

Sec.  63.8  Monitoring requirements.

    (a) * * *
    (2)(i) For the purposes of this part, all CMS required under
relevant standards shall be subject to the provisions of this section
upon promulgation of performance specifications and quality assurance
procedures for CMS as specified in the relevant standard or otherwise
by the Administrator.
    (ii) Performance specifications for CPMS promulgated under 40 CFR
part 60, appendix B and quality assurance procedures for CPMS
promulgated under 40 CFR part 60, appendix F apply instead of the
requirements for CPMS specified in the relevant standard upon
promulgation of the performance specifications and quality assurance
procedures for CPMS.
* * * * *
    (c) * * *
    (2)(i) All CMS must be installed such that representative
measurements of emissions or process parameters from the affected
source are obtained. In addition, CMS shall be located according to
procedures contained in the applicable performance specification(s).
* * * * *
    (4) Except for system breakdowns, out-of-control periods, repairs,
maintenance periods, calibration checks, and zero (low-level) and high-
level calibration drift adjustments, all CMS, including COMS, CEMS, and
CPMS, shall be in continuous operation and shall meet minimum frequency
of operation requirements as follows:
* * * * *
    (iii) All CPMS shall complete a minimum of one cycle of operation
(sampling, analyzing, and data recording) for each successive time
period specified in the relevant standard.
* * * * *
    (6) The owner or operator of a CMS that is not a CPMS, which is
installed in accordance with the provisions of this part and the
applicable CMS performance specification(s) shall check the zero (low-
level) and high-level calibration drifts at least once daily in
accordance with the written procedure specified in the performance
evaluation plan developed under paragraphs (e)(3)(i) and (e)(3)(ii) of
this section. The zero (low-level) and high-level calibration drifts
shall be adjusted, at a minimum, whenever the 24-hour zero (low-level)
drift exceeds two times the limits of the applicable performance
specification(s) specified in the relevant standard. The system must
allow the amount of excess zero (low-level) and high-level drift
measured at the 24-hour interval checks to be recorded and quantified,
whenever specified. For

COMS, all optical and instrumental surfaces exposed to the effluent
gases shall be cleaned prior to performing the zero (low-level) and
high-level drift adjustments; the optical surfaces and instrumental
surfaces shall be cleaned when the cumulative automatic zero
compensation, if applicable, exceeds 4 percent opacity.
* * * * *
    (7)(i) A CMS is out of control if--
    (A) The COMS or CEMS zero (low-level), mid-level (if applicable),
or high-level calibration drift (CD) exceeds two times the applicable
CD specification in the applicable performance specification or in the
relevant standard; or
    (B) The COMS or CEMS fails a performance test audit (e.g., cylinder
gas audit), relative accuracy audit, relative accuracy test audit, or
linearity test audit; or
    (C) The COMS CD exceeds two times the limit in the applicable
performance specification in the relevant standard; or
    (D) The CPMS fails an accuracy audit.
* * * * *
    (d) * * *
    (2) * * *
    (ii) Determination and adjustment of the calibration drift of the
CMS, where applicable;
* * * * *
    (e) * * *
    (2) Notification of performance evaluation. The owner or operator
shall notify the Administrator in writing of the date of the
performance evaluation of a COMS or CEMS simultaneously with the
notification of the performance test date required under Sec.  63.7(b)
or at least 60 days prior to the date the performance evaluation is
scheduled to begin if no performance test is required.
    (3)(i) Submission of site-specific performance evaluation test
plan. Before conducting a required COMS or CEMS performance evaluation,
the owner or operator of an affected source shall develop and submit a
site-specific performance evaluation test plan to the Administrator for
approval upon request. The performance evaluation test plan shall
include the evaluation program objectives, an evaluation program
summary, the performance evaluation schedule, data quality objectives,
and both an internal and external QA program. Data quality objectives
are the pre-evaluation expectations of precision, accuracy, and
completeness of data.
* * * * *
    (4) Conduct of performance evaluation and performance evaluation
dates. The owner or operator of an affected source shall conduct a
performance evaluation of a required CMS during any performance test
required under Sec.  63.7 in accordance with the applicable performance
specification or QA procedure as specified in the relevant standard.
Notwithstanding the requirement in the previous sentence, if the owner
or operator of an affected source elects to submit COMS data for
compliance with a relevant opacity emission standard as provided under
Sec.  63.6(h)(7), he/she shall conduct a performance evaluation of the
COMS as specified in the relevant standard, before the performance test
required under Sec.  63.7 is conducted in time to submit the results of
the performance evaluation as specified in paragraph (e)(5)(ii) of this
section. If a performance test is not required, or the requirement for
a performance test has been waived under Sec.  63.7(h), the owner or
operator of an affected source shall conduct the performance evaluation
not later than 180 days after the appropriate compliance date for the
affected source, as specified in Sec.  63.7(a), or as otherwise
specified in the relevant standard.
* * * * *

Subpart SS--[Amended]

    10. Section 63.996 is amended by adding paragraphs (c)(7) through
(c)(10) to read as follows:

Sec.  63.996  General monitoring requirements for control and recovery
devices.

* * * * *
    (c) * * *
    (7) For each CPMS, the owner or operator must meet the requirements
in paragraphs (c)(7)(i) through (vi) of this section.
    (i) Satisfy all requirements of applicable performance
specifications for CPMS established under 40 CFR part 60, appendix B.
    (ii) Satisfy all requirements of quality assurance (QA) procedures
for CPMS established under 40 CFR part 60, appendix F.
    (iii) The CPMS must complete a minimum of one cycle of operation
for each successive 15-minute period.
    (iv) To calculate a valid hourly average, there must be at least
four equally spaced values for that hour, excluding data collected
during the periods described in paragraph (c)(5) of this section.
    (v) Calculate a daily average using all of the valid hourly
averages for each day.
    (vi) Except for redundant sensors, any device that is used to
conduct an initial validation or accuracy audit of a CPMS must meet the
accuracy requirements specified in paragraphs (c)(7)(vi)(A) and (B) of
this section.
    (A) The device must have an accuracy that is traceable to National
Institute of Standards and Technology (NIST) standards.
    (B) The device must be at least three times as accurate as the
required accuracy for the CPMS.
    (8) For each temperature CPMS, the owner or operator must meet the
requirements in paragraphs (c)(8)(i) through (ix) of this section.
    (i) Install each sensor of the temperature CPMS in a location that
provides representative temperature measurements over all operating
conditions, taking into account the manufacturer's guidelines.
    (ii) For a noncryogenic temperature range, use a temperature CPMS
with a minimum tolerance of 2.8 deg. C or 1.0 percent of the
temperature value, whichever is larger.
    (iii) For a cryogenic temperature range, use a temperature CPMS
with a minimum tolerance of 2.8 deg. C or 2.5 percent of the
temperature value, whichever is larger.
    (iv) The data recording system associated with the CPMS must have a
resolution of one-half of the applicable required overall accuracy of
the CPMS, as specified in paragraph (c)(8)(ii) or (iii) of this
section, or better.
    (v) Perform an initial calibration of the CPMS according to the
procedures in the manufacturer's owner's manual.
    (vi) Perform an initial validation of the CPMS according to the
requirements in paragraph (c)(8)(vi)(A) or (B) of this section.
    (A) Place the sensor of a calibrated temperature measurement device
adjacent to the sensor of the temperature CPMS in a location that is
subject to the same environment as the sensor of the temperature CPMS.
The calibrated temperature measurement device must satisfy the accuracy
requirements of (c)(7)(vi) of this section. Allow sufficient time for
the response of the calibrated temperature measurement device to reach
equilibrium. With the process and control device that is monitored by
the CPMS operating normally, record concurrently and compare the
temperatures measured by the temperature CPMS and the calibrated
temperature measurement device. Using the calibrated temperature
measurement device as the reference, the temperature measured by the
temperature CPMS must be within the accuracy specified in paragraph
(c)(8)(ii) or (iii) of this section, whichever applies.
    (B) Perform any of the initial validation methods for temperature
CPMS specified in applicable performance specifications established
under 40 CFR part 60, appendix B.

    (vii) Perform an accuracy audit of the temperature CPMS at least
quarterly, according to the requirements in paragraph (c)(8)(vii)(A),
(B), or (C) of this section.
    (A) If the temperature CPMS includes a redundant temperature
sensor, record three pairs of concurrent temperature measurements
within a 24-hour period. Each pair of concurrent measurements must
consist of a temperature measurement by each of the two temperature
sensors. The minimum time interval between any two such pairs of
consecutive temperature measurements is one hour. The readings must be
taken during periods when the process and control device that is
monitored by the CPMS is operating normally. Calculate the mean of the
three values for each temperature sensor. The mean values must agree
within the required overall accuracy of the CPMS, as specified in
paragraph (c)(8)(ii) or (iii) of this section, whichever applies.
    (B) If the temperature CPMS does not include a redundant
temperature sensor, place the sensor of a calibrated temperature
measurement device adjacent to the sensor of the temperature CPMS in a
location that is subject to the same environment as the sensor of the
temperature CPMS. The calibrated temperature measurement device must
satisfy the accuracy requirements of paragraph (c)(7)(vi) of this
section. Allow sufficient time for the response of the calibrated
temperature measurement device to reach equilibrium. With the process
and control device that is monitored by the CPMS operating normally,
record concurrently and compare the temperatures measured by the
temperature CPMS and the calibrated temperature measurement device.
Using the calibrated temperature measurement device as the reference,
the temperature measured by the temperature CPMS must be within the
accuracy specified in paragraph (c)(8)(ii) or (iii) of this section,
whichever applies.
    (C) Perform any of the accuracy audit methods for temperature CPMS
specified in applicable QA procedures established under 40 CFR part 60,
appendix F.
    (viii) Conduct an accuracy audit following any 24-hour period
throughout which the temperature measured by the CPMS exceeds the
manufacturer's specified maximum operating temperature range, or
install a new temperature sensor.
    (ix) If the CPMS is not equipped with a redundant temperature
sensor, at least quarterly, perform a visual inspection of all
components for integrity, oxidation, and galvanic corrosion.
    (9) For each pressure CPMS, the owner or operator must meet the
requirements in paragraph (c)(9)(i) through (ix) of this section.
    (i) Install each sensor of the pressure CPMS in a location that
provides representative pressure measurements over all operating
conditions, taking into account the manufacturer's guidelines.
    (ii) Use a pressure CPMS with a minimum tolerance of 5
percent or 0.12 kilopascals (0.5 inches of water column), whichever is
greater.
    (iii) The data recording system associated with the pressure CPMS
must have a resolution of one-half of the required overall accuracy of
the CPMS, as specified in paragraph (c)(9)(ii) of this section.
    (iv) Perform an initial calibration of the CPMS according to the
procedures in the manufacturer's owner's manual.
    (v) Perform an initial validation of the CPMS according to the
requirements in paragraph (c)(9)(v)(A) or (B) of this section.
    (A) Place the sensor of a calibrated pressure measurement device
adjacent to the sensor of the pressure CPMS in a location that is
subject to the same environment as the sensor of the pressure CPMS. The
calibrated pressure measurement device must satisfy the accuracy
requirements of paragraph (c)(7)(vi) of this section. Allow sufficient
time for the response of the calibrated pressure measurement device to
reach equilibrium. With the process and control device that is
monitored by the CPMS operating normally, record concurrently and
compare the pressure measured by the pressure CPMS and the calibrated
pressure measurement device. Using the calibrated pressure measurement
device as the reference, the pressure measured by the pressure CPMS
must be within the accuracy specified in paragraph (c)(9)(ii) of this
section.
    (B) Perform any of the initial validation methods for pressure CPMS
specified in applicable performance specifications established under 40
CFR part 60, appendix B.
    (vi) Perform an accuracy audit of the pressure CPMS at least
quarterly, according to the requirements in paragraph (c)(9)(vi)(A),
(B), or (C) of this section.
    (A) If the pressure CPMS includes a redundant pressure sensor,
record three pairs of concurrent pressure measurements within a 24-hour
period. Each pair of concurrent measurements must consist of a pressure
measurement by each of the two pressure sensors. The minimum time
interval between any two such pairs of consecutive pressure
measurements is 1 hour. The readings must be taken during periods when
the process and control device that is monitored by the CPMS is
operating normally. Calculate the mean of the three pressure
measurement values for each pressure sensor. The mean values must agree
within the required overall accuracy of the CPMS, as specified in
paragraph (c)(9)(ii) of this section.
    (B) If the pressure CPMS does not include a redundant pressure
sensor, place the sensor of a calibrated pressure measurement device
adjacent to the sensor of the pressure CPMS in a location that is
subject to the same environment as the sensor of the pressure CPMS. The
calibrated pressure measurement device must satisfy the accuracy
requirements of paragraph (c)(7)(vi) of this section. Allow sufficient
time for the response of the calibrated pressure measurement device to
reach equilibrium. With the process and control device that is
monitored by the CPMS operating normally, record concurrently and
compare the pressure measured by the pressure CPMS and the calibrated
pressure measurement device. Using the calibrated pressure measurement
device as the reference, the pressure measured by the pressure CPMS
must be within the accuracy specified in paragraph (c)(9)(ii) of this
section.
    (C) Perform any of the accuracy audit methods for pressure CPMS
specified in applicable QA procedures established under 40 CFR part 60,
appendix F.