| (a) Totalizing fuel flow meters.
(1) The owner or operator of each unit subject to §117.2010
of this title (relating to Emission Specifications) and subject to
Chapter 101, Subchapter H, Division 3 of this title (relating to Mass
Emissions Cap and Trade Program), or of each unit claimed exempt under §117.2003(b)
of this title (relating to Exemptions) shall install, calibrate, maintain,
and operate totalizing fuel flow meters with an accuracy of ±
5%, to individually and continuously measure the gas and liquid fuel
usage. A computer that collects, sums, and stores electronic data
from continuous fuel flow meters is an acceptable totalizer. The owner
or operator of units with totalizing fuel flow meters installed prior
to March 31, 2005, that do not meet the accuracy requirements of this
subsection shall either recertify or replace existing meters to meet
the ± 5% accuracy required as soon as practicable, but no later
than March 31, 2007. For the purpose of compliance with this subsection
for units having pilot fuel supplied by a separate fuel system or
from an unmonitored portion of the same fuel system, the fuel flow
to pilots may be calculated using the manufacturer's design flow rates
rather than measured with a fuel flow meter. The calculated pilot
fuel flow rate must be added to the monitored fuel flow when fuel
flow is totaled.
(2) The following are alternatives to the fuel flow
monitoring requirements of this subsection.
(A) Units operating with a nitrogen oxides (NOX ) and diluent continuous emissions monitoring
system (CEMS) under subsection (c) of this section may monitor stack
exhaust flow using the flow monitoring specifications of 40 Code of
Federal Regulations (CFR) Part 60, Appendix B, Performance Specification
6 or 40 CFR Part 75, Appendix A.
(B) Units that vent to a common stack with a NOX and diluent CEMS under subsection (c) of
this section may use a single totalizing fuel flow meter.
(C) Diesel engines operating with run time meters may
meet the fuel flow monitoring requirements of this subsection through
monthly fuel use records.
(D) Units of the same category of equipment subject
to Chapter 101, Subchapter H, Division 3 of this title may share a
single totalizing fuel flow meter provided:
(i) the owner or operator performs a stack test in
accordance with subsection (e) of this section for each unit sharing
the totalizing fuel flow meter; and
(ii) the testing results from the unit with the highest
emission rate (in pounds per million British thermal units or grams
per horsepower-hour) are used for reporting purposes in §101.359
of this title (relating to Reporting) for all units sharing the totalizing
fuel flow meter.
(E) The owner or operator of a unit or units claimed
exempt under §117.2003(b) of this title, located at an independent
school district may demonstrate compliance with the exemption by the
following:
(i) in addition to the records required by §117.2045(a)(1)
of this title (relating to Recordkeeping and Reporting Requirements),
maintain the following monthly records in either electronic or written
format. These records must be kept for a period of at least five years
and must be made available upon request by authorized representatives
of the executive director, the United States Environmental Protection
Agency, or local air pollution control agencies having jurisdiction;
(I) total fuel usage for the entire site;
(II) the estimated hours of operation for each unit;
(III) the estimated average operating rate (e.g., a
percentage of maximum rated capacity) for each unit; and
(IV) the estimated fuel usage for each unit; and
(ii) within 60 days of written request by the executive
director, submit for review and approval all methods, engineering
calculations, and process information used to estimate the hours of
operation, operating rates, and fuel usage for each unit.
(F) The owner or operator of units claimed exempt under §117.2003(b)
of this title may share a single totalizing fuel flow meter to demonstrate
compliance with the exemption, provided that:
(i) all affected units at the site qualify for the
exemption under §117.2003(b) of this title; and
(ii) the total fuel usage for all units at the site
is less than:
(I) the annual fuel usage limitation in §117.2003(b)(1)
of this title; or
(II) the annual fuel usage limitation in §117.2003(b)(2)
of this title when all affected units at the site are equal to or
greater than 5.0 million British thermal units per hour.
(G) Stationary reciprocating internal combustion engines
and stationary gas turbines equipped with a continuous monitoring
system that continuously monitors horsepower and hours of operation
are not required to install totalizing fuel flow meters. The continuous
monitoring system must be installed, calibrated, maintained, and operated
according to manufacturer's procedures.
(b) Oxygen (O2 ) monitors.
If the owner or operator installs an O2 monitor,
the criteria in §117.8100(a) of this title (relating to Emission
Monitoring System Requirements for Industrial, Commercial, and Institutional
Sources) should be considered the appropriate guidance for the location
and calibration of the monitor.
(c) NOX monitors. If the
owner or operator installs a CEMS or predictive emissions monitoring
system (PEMS), it must meet the requirements of §117.8100(a)
or (b) of this title. If a PEMS is used, the PEMS must predict the
pollutant emissions in the units of the applicable emission specifications
of this division (relating to Houston-Galveston-Brazoria Ozone Nonattainment
Area Minor Sources).
(d) Monitor installation schedule. Installation of
monitors must be performed in accordance with the schedule specified
in §117.9200 of this title (relating to Compliance Schedule for
Houston-Galveston-Brazoria Ozone Nonattainment Area Minor Sources).
(e) Testing requirements. The owner or operator of
any unit subject to §117.2010 of this title shall comply with
the following testing requirements.
(1) Each unit must be tested for NOX
, carbon monoxide (CO), and O2 emissions.
(2) One of the ammonia monitoring procedures specified
in §117.8130 of this title (relating to Ammonia Monitoring) must
be used to demonstrate compliance with the ammonia emission specification
of §117.2010(i)(2) of this title for units that inject urea or
ammonia into the exhaust stream for NOX control.
This paragraph does not apply to stationary diesel engines equipped
with selective catalytic reduction (SCR) systems that meet the following
criteria.
(A) The SCR system must use a reductant other than
the engine's fuel.
(B) The SCR system must operate with a diagnostic system
that monitors reductant quality and tank levels.
(C) The diagnostic system must alert owners or operators
to the need to refill the reductant tank before it is empty or to
replace the reductant if the reductant does not meet applicable concentration
specifications.
(D) If the SCR system uses input from an exhaust NOX sensor (or other sensor) to alert owners
or operators when the reductant quality is inadequate, the reductant
quality does not need to be monitored separately by the diagnostic
system.
(E) The reductant tank level must be monitored in accordance
with the manufacturer's design to demonstrate compliance with this
paragraph.
(F) The method of alerting an owner or operator must
be a visual or audible alarm.
(3) For units not equipped with CEMS or PEMS, all testing
must be conducted according to §117.8000 of this title (relating
to Stack Testing Requirements). In lieu of the test methods specified
in §117.8000 of this title, the owner or operator may use American
Society for Testing and Materials (ASTM) D6522-00 to perform the NOX , CO, and O2 testing
required by this subsection on natural gas-fired reciprocating engines,
combustion turbines, boilers, and process heaters. If the owner or
operator elects to use ASTM D6522-00 for the testing requirements,
the report must contain the information specified in §117.8010
of this title (relating to Compliance Stack Test Reports).
(4) Test results must be reported in the units of the
applicable emission specifications and averaging periods. If compliance
testing is based on 40 CFR Part 60, Appendix A reference methods,
the report must contain the information specified in §117.8010
of this title.
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