[Code of Federal Regulations]
[Title 40, Volume 14]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR75.10]
[Page 213-215]
TITLE 40--PROTECTION OF ENVIRONMENT
CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
PART 75--CONTINUOUS EMISSION MONITORING--Table of Contents
Subpart B--Monitoring Provisions
Sec. 75.10 General operating requirements.
(a) Primary Measurement Requirement. The owner or operator shall
measure opacity, and all SO2, NOx, and
CO2 emissions for each affected unit as follows:
(1) To determine SO2 emissions, the owner or operator
shall install, certify, operate, and maintain, in accordance with all
the requirements of this part, a SO2 continuous emission
monitoring system and a flow monitoring system with an automated data
acquisition and handling system for measuring and recording
SO2 concentration (in ppm), volumetric gas flow (in scfh),
and SO2 mass emissions (in lb/hr) discharged to the
atmosphere, except as provided in Secs. 75.11 and 75.16 and subpart E of
this part;
(2) To determine NOX emissions, the owner or operator
shall install, certify, operate, and maintain, in accordance with all
the requirements of this part, a NOX-diluent continuous
emission monitoring system (consisting of a NOX pollutant
concentration monitor and an O2 or CO2 diluent gas
monitor) with an automated data acquisition and handling system for
measuring and recording NOX concentration (in ppm),
O2 or CO2 concentration (in percent O2
or CO2) and NOX emission rate (in lb/mmBtu)
discharged to the atmosphere, except as provided in Secs. 75.12 and
75.17 and subpart E of this part. The owner or operator shall account
for total NOX emissions, both NO and NO2, either
by monitoring for both NO and NO2 or by monitoring for NO
only and adjusting the emissions data to account for NO2;
(3) The owner or operator shall determine CO2 emissions
by using one of the following options, except as provided in Sec. 75.13
and subpart E of this part:
(i) The owner or operator shall install, certify, operate, and
maintain, in accordance with all the requirements of this part, a
CO2 continuous emission monitoring system and a flow
monitoring system with an automated data acquisition and handling system
for measuring and recording CO2 concentration (in ppm or
percent), volumetric gas flow (in scfh), and CO2 mass
emissions (in tons/hr) discharged to the atmosphere;
(ii) The owner or operator shall determine CO2 emissions
based on the measured carbon content of the fuel and the procedures in
appendix G of this part to estimate CO2 emissions (in ton/
day) discharged to the atmosphere; or
(iii) The owner or operator shall install, certify, operate, and
maintain, in accordance with all the requirements of this part, a flow
monitoring system and a CO2 continuous emission monitoring
system that uses an O2 concentration monitor to determine
CO2
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emissions (according to the procedures in appendix F of this part) with
an automated data acquisition and handling system for measuring and
recording O2 concentration (in percent), CO2
concentration (in percent), volumetric gas flow (in scfh), and
CO2 mass emissions (in tons/hr) discharged to the atmosphere;
(4) The owner or operator shall install, certify, operate, and
maintain, in accordance with all the requirements in this part, a
continuous opacity monitoring system with the automated data acquisition
and handling system for measuring and recording the opacity of emissions
(in percent opacity) discharged to the atmosphere, except as provided in
Secs. 75.14 and 75.18; and
(5) A single certified flow monitoring system may be used to meet
the requirements of paragraphs (a)(1) and (a)(3) of this section. A
single certified diluent monitor may be used to meet the requirements of
paragraphs (a)(2) and (a)(3) of this section. A single automated data
acquisition and handling system may be used to meet the requirements of
paragraphs (a)(1) through (a)(4) of this section.
(b) Primary Equipment Performance Requirements. The owner or
operator shall ensure that each continuous emission monitoring system
required by this part meets the equipment, installation, and performance
specifications in appendix A to this part; and is maintained according
to the quality assurance and quality control procedures in appendix B to
this part; and shall record SO2 and NOx emissions
in the appropriate units of measurement (i.e., lb/hr for SO2
and lb/mmBtu for NOx).
(c) Heat Input Rate Measurement Requirement. The owner or operator
shall determine and record the heat input rate, in units of mmBtu/hr, to
each affected unit for every hour or part of an hour any fuel is
combusted following the procedures in appendix F to this part.
(d) Primary equipment hourly operating requirements. The owner or
operator shall ensure that all continuous emission and opacity
monitoring systems required by this part are in operation and monitoring
unit emissions or opacity at all times that the affected unit combusts
any fuel except as provided in Sec. 75.11(e) and during periods of
calibration, quality assurance, or preventive maintenance, performed
pursuant to Sec. 75.21 and appendix B of this part, periods of repair,
periods of backups of data from the data acquisition and handling
system, or recertification performed pursuant to Sec. 75.20. The owner
or operator shall also ensure, subject to the exceptions above in this
paragraph, that all continuous opacity monitoring systems required by
this part are in operation and monitoring opacity during the time
following combustion when fans are still operating, unless fan operation
is not required to be included under any other applicable Federal,
State, or local regulation, or permit. The owner or operator shall
ensure that the following requirements are met:
(1) The owner or operator shall ensure that each continuous emission
monitoring system is capable of completing a minimum of one cycle of
operation (sampling, analyzing, and data recording) for each successive
15-min interval. The owner or operator shall reduce all SO2
concentrations, volumetric flow, SO2 mass emissions,
CO2 concentration, O2 concentration,
CO2 mass emissions (if applicable), NOX
concentration, and NOX emission rate data collected by the
monitors to hourly averages. Hourly averages shall be computed using at
least one data point in each fifteen minute quadrant of an hour, where
the unit combusted fuel during that quadrant of an hour. Notwithstanding
this requirement, an hourly average may be computed from at least two
data points separated by a minimum of 15 minutes (where the unit
operates for more than one quadrant of an hour) if data are unavailable
as a result of the performance of calibration, quality assurance, or
preventive maintenance activities pursuant to Sec. 75.21 and appendix B
of this part, or backups of data from the data acquisition and handling
system, or recertification, pursuant to Sec. 75.20. The owner or
operator shall use all valid measurements or data points collected
during an hour to calculate the hourly averages. All data points
collected during an hour shall be, to the extent practicable, evenly
spaced over the hour.
[[Page 215]]
(2) The owner or operator shall ensure that each continuous opacity
monitoring system is capable of completing a minimum of one cycle of
sampling and analyzing for each successive 10-sec period and one cycle
of data recording for each successive 6-min period. The owner or
operator shall reduce all opacity data to 6-min averages calculated in
accordance with the provisions of part 51, appendix M of this chapter,
except where the applicable State implementation plan or operating
permit requires a different averaging period, in which case the State
requirement shall satisfy this Acid Rain Program requirement.
(3) Failure of an SO2, CO2, or O2
pollutant concentration monitor, NOX concentration monitor,
flow monitor, moisture monitor, or NOX-diluent continuous
emission monitoring system to acquire the minimum number of data points
for calculation of an hourly average in paragraph (d)(1) of this section
shall result in the failure to obtain a valid hour of data and the loss
of such component data for the entire hour. For a NOX-diluent
monitoring system, an hourly average NOX emission rate in lb/
mmBtu is valid only if the minimum number of data points is acquired by
both the NOX pollutant concentration monitor and the diluent
monitor (O2 or CO2). For a moisture monitoring
system consisting of one or more oxygen analyzers capable of measuring
O2 on a wet-basis and a dry-basis, an hourly average percent
moisture value is valid only if the minimum number of data points is
acquired for both the wet-and dry-basis measurements. If a valid hour of
data is not obtained, the owner or operator shall estimate and record
emissions, moisture, or flow data for the missing hour by means of the
automated data acquisition and handling system, in accordance with the
applicable procedure for missing data substitution in subpart D of this
part.
(e) Optional backup monitor requirements. If the owner or operator
chooses to use two or more continuous emission monitoring systems, each
of which is capable of monitoring the same stack or duct at a specific
affected unit, or group of units using a common stack, then the owner or
operator shall designate one monitoring system as the primary monitoring
system, and shall record this information in the monitoring plan, as
provided for in Sec. 75.53. The owner or operator shall designate the
other monitoring system(s) as backup monitoring system(s) in the
monitoring plan. The backup monitoring system(s) shall be designated as
redundant backup monitoring system(s), non-redundant backup monitoring
system(s), or reference method backup system(s), as described in
Sec. 75.20(d). When the certified primary monitoring system is operating
and not out-of-control as defined in Sec. 75.24, only data from the
certified primary monitoring system shall be reported as valid, quality-
assured data. Thus, data from the backup monitoring system may be
reported as valid, quality-assured data only when the backup is
operating and not out-of-control as defined in Sec. 75.24 (or in the
applicable reference method in appendix A of part 60 of this chapter)
and when the certified primary monitoring system is not operating (or is
operating but out-of-control). A particular monitor may be designated
both as a certified primary monitor for one unit and as a certified
redundant backup monitor for another unit.
(f) Minimum measurement capability requirement. The owner or
operator shall ensure that each continuous emission monitoring system is
capable of accurately measuring, recording, and reporting data, and
shall not incur an exceedance of the full scale range, except as
provided in sections 2.1.1.5, 2.1.2.5, and 2.1.4.3 of appendix A to this
part.
(g) Minimum recording and recordkeeping requirements. The owner or
operator shall record and the designated representative shall report the
hourly, daily, quarterly, and annual information collected under the
requirements of this part as specified in subparts F and G of this part.
[58 FR 3701, Jan. 11, 1993, as amended at 60 FR 26519, May 17, 1995; 64
FR 28590, May 26, 1999; 67 FR 40422, June 12, 2002]