[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: 40CFR75.57]
[Page 287-292]
TITLE 40--PROTECTION OF ENVIRONMENT
CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
PART 75--CONTINUOUS EMISSION MONITORING--Table of Contents
Subpart F--Recordkeeping Requirements
Sec. 75.57 General recordkeeping provisions.
The owner or operator shall meet all of the applicable recordkeeping
requirements of this section.
(a) Recordkeeping requirements for affected sources. The owner or
operator of any affected source subject to the requirements of this part
shall maintain for each affected unit a file of all measurements, data,
reports, and other information required by this part at the source in a
form suitable for inspection for at least three (3) years from the date
of each record. Unless otherwise provided, throughout this subpart the
phrase ``for each affected unit'' also applies to each group of affected
or nonaffected units utilizing a common stack and common monitoring
systems, pursuant to Secs. 75.16 through 75.18, or utilizing a common
pipe header and common fuel flowmeter, pursuant to section 2.1.2 of
appendix D to this part. The file shall contain the following
information:
(1) The data and information required in paragraphs (b) through (h)
of this section, beginning with the earlier of the date of provisional
certification or the deadline in Sec. 75.4(a), (b), or (c);
(2) The supporting data and information used to calculate values
required in paragraphs (b) through (g) of this section, excluding the
subhourly data points used to compute hourly averages under
Sec. 75.10(d), beginning with the earlier of the date of provisional
certification or the deadline in Sec. 75.4(a), (b), or (c);
(3) The data and information required in Sec. 75.58 for specific
situations, beginning with the earlier of the date of provisional
certification or the deadline in Sec. 75.4(a), (b), or (c);
(4) The certification test data and information required in
Sec. 75.59 for tests required under Sec. 75.20, beginning with the date
of the first certification test performed, the quality assurance and
quality control data and information required in Sec. 75.59 for tests,
and the quality assurance/quality control plan required under Sec. 75.21
and appendix B to this part, beginning with the date of provisional
certification;
(5) The current monitoring plan as specified in Sec. 75.53,
beginning with the initial submission required by Sec. 75.62; and
(6) The quality control plan as described in section 1 of appendix B
to this part, beginning with the date of provisional certification.
(b) Operating parameter record provisions. The owner or operator
shall record for each hour the following information on unit operating
time, heat input rate, and load, separately for each affected unit and
also for each group of units utilizing a common stack and a common
monitoring system or utilizing a common pipe header and common fuel
flowmeter:
(1) Date and hour;
(2) Unit operating time (rounded up to the nearest fraction of an
hour (in equal increments that can range from one hundredth to one
quarter of an hour, at the option of the owner or operator));
(3) Hourly gross unit load (rounded to nearest MWge) (or steam load
in 1000 lb/hr at stated temperature and pressure, rounded to the nearest
1000 lb/hr, if elected in the monitoring plan);
(4) Operating load range corresponding to hourly gross load of 1 to
10, except for units using a common stack or common pipe header, which
may use up to 20 load ranges for stack or fuel flow, as specified in the
monitoring plan;
(5) Hourly heat input rate (mmBtu/hr, rounded to the nearest tenth);
(6) Identification code for formula used for heat input, as provided
in Sec. 75.53; and
(7) For CEMS units only, F-factor for heat input calculation and
indication of whether the diluent cap was used for heat input
calculations for the hour.
[[Page 288]]
(c) SO2 emission record provisions. The owner or operator
shall record for each hour the information required by this paragraph
for each affected unit or group of units using a common stack and common
monitoring systems, except as provided under Sec. 75.11(e) or for a gas-
fired or oil-fired unit for which the owner or operator is using the
optional protocol in appendix D to this part or for a low mass emissions
unit for which the owner or operator is using the optional low mass
emissions methodology in Sec. 75.19(c) for estimating SO2
mass emissions:
(1) For SO2 concentration during unit operation, as
measured and reported from each certified primary monitor, certified
back-up monitor, or other approved method of emissions determination:
(i) Component-system identification code, as provided in Sec. 75.53;
(ii) Date and hour;
(iii) Hourly average SO2 concentration (ppm, rounded to
the nearest tenth);
(iv) Hourly average SO2 concentration (ppm, rounded to
the nearest tenth), adjusted for bias if bias adjustment factor is
required, as provided in Sec. 75.24(d);
(v) Percent monitor data availability (recorded to the nearest tenth
of a percent), calculated pursuant to Sec. 75.32; and
(vi) Method of determination for hourly average SO2
concentration using Codes 1-55 in Table 4a of this section.
(2) For flow rate during unit operation, as measured and reported
from each certified primary monitor, certified back-up monitor, or other
approved method of emissions determination:
(i) Component-system identification code, as provided in Sec. 75.53;
(ii) Date and hour;
(iii) Hourly average volumetric flow rate (in scfh, rounded to the
nearest thousand);
(iv) Hourly average volumetric flow rate (in scfh, rounded to the
nearest thousand), adjusted for bias if bias adjustment factor required,
as provided in Sec. 75.24(d);
(v) Percent monitor data availability (recorded to the nearest tenth
of a percent) for the flow monitor, calculated pursuant to Sec. 75.32;
and
(vi) Method of determination for hourly average flow rate using
Codes 1-55 in Table 4a of this section.
(3) For flue gas moisture content during unit operation (where
SO2 concentration is measured on a dry basis), as measured
and reported from each certified primary monitor, certified back-up
monitor, or other approved method of emissions determination:
(i) Component-system identification code, as provided in Sec. 75.53;
(ii) Date and hour;
(iii) Hourly average moisture content of flue gas (percent, rounded
to the nearest tenth). If the continuous moisture monitoring system
consists of wet- and dry-basis oxygen analyzers, also record both the
wet- and dry-basis oxygen hourly averages (in percent O2,
rounded to the nearest tenth);
(iv) Percent monitor data availability (recorded to the nearest
tenth of a percent) for the moisture monitoring system, calculated
pursuant to Sec. 75.32; and
(v) Method of determination for hourly average moisture percentage,
using Codes 1-55 in Table 4a of this section.
(4) For SO2 mass emission rate during unit operation, as
measured and reported from the certified primary monitoring system(s),
certified redundant or non-redundant back-up monitoring system(s), or
other approved method(s) of emissions determination:
(i) Date and hour;
(ii) Hourly SO2 mass emission rate (lb/hr, rounded to the
nearest tenth);
(iii) Hourly SO2 mass emission rate (lb/hr, rounded to
the nearest tenth), adjusted for bias if bias adjustment factor
required, as provided in Sec. 75.24(d); and
(iv) Identification code for emissions formula used to derive hourly
SO2 mass emission rate from SO2 concentration and
flow and (if applicable) moisture data in paragraphs (c)(1), (c)(2), and
(c)(3) of this section, as provided in Sec. 75.53.
[[Page 289]]
Table 4a--Codes for Method of Emissions and Flow Determination
------------------------------------------------------------------------
Hourly emissions/flow measurement or estimation
Code method
------------------------------------------------------------------------
1..................... Certified primary emission/flow monitoring
system.
2..................... Certified backup emission/flow monitoring
system.
3..................... Approved alternative monitoring system.
4..................... Reference method:
SO2: Method 6C.
Flow: Method 2 or its allowable alternatives
under appendix A to part 60 of this chapter.
NOX: Method 7E.
CO2 or O2: Method 3A.
5..................... For units with add-on SO2 and/or NOX emission
controls: SO2 concentration or NOX emission
rate estimate from Agency preapproved
parametric monitoring method.
6..................... Average of the hourly SO2 concentrations, CO2
concentrations, O2 concentrations, NOX
concentrations, flow rates, moisture
percentages or NOX emission rates for the hour
before and the hour following a missing data
period.
7..................... Initial missing data procedures used. Either:
(a) the average of the hourly SO2
concentration, CO2 concentration, O2
concentration, or moisture percentage for the
hour before and the hour following a missing
data period; or (b) the arithmetic average of
all NOX concentration, NOX emission rate, or
flow rate values at the corresponding load
range (or a higher load range), or at the
corresponding operational bin (non-load-based
units, only); or (c) the arithmetic average of
all previous NOX concentration, NOX emission
rate, or flow rate values (non-load- based
units, only).
8..................... 90th percentile hourly SO2 concentration, CO2
concentration, NOX concentration, flow rate,
moisture percentage, or NOX emission rate or
10th percentile hourly O2 concentration or
moisture percentage in the applicable lookback
period (moisture missing data algorithm depends
on which equations are used for emissions and
heat input).
9..................... 95th percentile hourly SO2 concentration, CO2
concentration, NOX concentration, flow rate,
moisture percentage, or NOX emission rate or
5th percentile hourly O2 concentration or
moisture percentage in the applicable lookback
period (moisture missing data algorithm depends
on which equations are used for emissions and
heat input).
10.................... Maximum hourly SO2 concentration, CO2
concentration, NOX concentration, flow rate,
moisture percentage, or NOX emission rate or
minimum hourly O2 concentration or moisture
percentage in the applicable lookback period
(moisture missing data algorithm depends on
which equations are used for emissions and heat
input).
11.................... Average of hourly flow rates, NOX concentrations
or NOX emission rates in corresponding load
range, for the applicable lookback period. For
non-load-based units, report either the average
flow rate, NOX concentration or NOX emission
rate in the applicable lookback period, or the
average flow rate or NOX value at the
corresponding operational bin (if operational
bins are used).
12.................... Maximum potential concentration of SO2, maximum
potential concentration of CO2, maximum
potential concentration of NOX maximum
potential flow rate, maximum potential NOX
emission rate, maximum potential moisture
percentage, minimum potential O2 concentration
or minimum potential moisture percentage, as
determined using Sec. 72.2 of this chapter and
section 2.1 of appendix A to this part
(moisture missing data algorithm depends on
which equations are used for emissions and heat
input).
13.................... [Reserved]
14.................... Diluent cap value (if the cap is replacing a CO2
measurement, use 5.0 percent for boilers and
1.0 percent for turbines; if it is replacing an
O2 measurement, use 14.0 percent for boilers
and 19.0 percent for turbines).
15.................... [Reserved]
16.................... SO2 concentration value of 2.0 ppm during hours
when only ``very low sulfur fuel'', as defined
in Sec. 72.2 of this chapter, is combusted.
17.................... Like-kind replacement non-redundant backup
analyzer.
19.................... 200 percent of the MPC; default high range
value.
20.................... 200 percent of the full-scale range setting
(full-scale exceedance of high range).
21.................... Negative hourly SO2 concentration, NOX
concentration, percent moisture, or NOX
emission rate replaced with zero.
22.................... Hourly average SO2 or NOX concentration,
measured by a certified monitor at the control
device inlet (units with add-on emission
controls only).
23.................... Maximum potential SO2 concentration, NOX
concentration, CO2 concentration, NOX emission
rate or flow rate, or minimum potential O2
concentration or moisture percentage, for an
hour in which flue gases are discharged through
an unmonitored bypass stack.
25.................... Maximum potential NOX emission rate (MER). (Use
only when a NOX concentration full-scale
exceedance occurs and the diluent monitor is
unavailable.)
54.................... Other quality-assured methodologies approved
through petition. These hours are included in
missing data lookback and are treated as
unavailable hours for percent monitor
availability calculations.
55.................... Other substitute data approved through petition.
These hours are not included in missing data
lookback and are treated as unavailable hours
for percent monitor availability calculations.
------------------------------------------------------------------------
(d) NOX emission record provisions. The owner or operator
shall record the applicable information required by this paragraph for
each affected unit for each hour or partial hour during which the unit
operates, except for a gas-fired peaking unit or oil-fired peaking unit
for which the owner or operator is using the optional protocol in
appendix E to this part or a low mass emissions
[[Page 290]]
unit for which the owner or operator is using the optional low mass
emissions excepted methodology in Sec. 75.19(c) for estimating
NOX emission rate. For each NOX emission rate (in
lb/mmBtu) measured by a NOX-diluent monitoring system, or, if
applicable, for each NOX concentration (in ppm) measured by a
NOX concentration monitoring system used to calculate
NOX mass emissions under Sec. 75.71(a)(2), record the
following data as measured and reported from the certified primary
monitor, certified back-up monitor, or other approved method of
emissions determination:
(1) Component-system identification code, as provided in Sec. 75.53
(including identification code for the moisture monitoring system, if
applicable);
(2) Date and hour;
(3) Hourly average NOX concentration (ppm, rounded to the
nearest tenth) and hourly average NOX concentration (ppm,
rounded to the nearest tenth) adjusted for bias if bias adjustment
factor required, as provided in Sec. 75.24(d);
(4) Hourly average diluent gas concentration (for NOX-
diluent monitoring systems, only, in units of percent O2 or
percent CO2, rounded to the nearest tenth);
(5) If applicable, the hourly average moisture content of the stack
gas (percent H2O, rounded to the nearest tenth). If the
continuous moisture monitoring system consists of wet- and dry-basis
oxygen analyzers, also record both the hourly wet- and dry-basis oxygen
readings (in percent O2, rounded to the nearest tenth);
(6) Hourly average NOX emission rate (for NOX-
diluent monitoring systems only, in units of lb/mmBtu, rounded to the
nearest thousandth);
(7) Hourly average NOX emission rate (for NOX-
diluent monitoring systems only, in units of lb/mmBtu, rounded to the
nearest thousandth), adjusted for bias if bias adjustment factor is
required, as provided in Sec. 75.24(d). The requirement to report hourly
NOX emission rates to the nearest thousandth shall not affect
NOX compliance determinations under part 76 of this chapter;
compliance with each applicable emission limit under part 76 shall be
determined to the nearest hundredth pound per million Btu;
(8) Percent monitoring system data availability (recorded to the
nearest tenth of a percent), for the NOX-diluent or
NOX concentration monitoring system, and, if applicable, for
the moisture monitoring system, calculated pursuant to Sec. 75.32;
(9) Method of determination for hourly average NOX
emission rate or NOX concentration and (if applicable) for
the hourly average moisture percentage, using Codes 1-55 in Table 4a of
this section; and
(10) Identification codes for emissions formulas used to derive
hourly average NOX emission rate and total NOX
mass emissions, as provided in Sec. 75.53, and (if applicable) the F-
factor used to convert NOX concentrations into emission
rates.
(e) CO2 emission record provisions. Except for a low mass
emissions unit for which the owner or operator is using the optional low
mass emissions excepted methodology in Sec. 75.19(c) for estimating
CO2 mass emissions, the owner or operator shall record or
calculate CO2 emissions for each affected unit using one of
the following methods specified in this section:
(1) If the owner or operator chooses to use a CO2 CEMS
(including an O2 monitor and flow monitor, as specified in
appendix F to this part), then the owner or operator shall record for
each hour or partial hour during which the unit operates the following
information for CO2 mass emissions, as measured and reported
from the certified primary monitor, certified back-up monitor, or other
approved method of emissions determination:
(i) Component-system identification code, as provided in Sec. 75.53
(including identification code for the moisture monitoring system, if
applicable);
(ii) Date and hour;
(iii) Hourly average CO2 concentration (in percent,
rounded to the nearest tenth);
(iv) Hourly average volumetric flow rate (scfh, rounded to the
nearest thousand scfh);
(v) Hourly average moisture content of flue gas (percent, rounded to
the nearest tenth), where CO2 concentration is measured on a
dry basis. If the
[[Page 291]]
continuous moisture monitoring system consists of wet- and dry-basis
oxygen analyzers, also record both the hourly wet- and dry-basis oxygen
readings (in percent O2, rounded to the nearest tenth);
(vi) Hourly average CO2 mass emission rate (tons/hr,
rounded to the nearest tenth);
(vii) Percent monitor data availability for both the CO2
monitoring system and, if applicable, the moisture monitoring system
(recorded to the nearest tenth of a percent), calculated pursuant to
Sec. 75.32;
(viii) Method of determination for hourly average CO2
mass emission rate and hourly average CO2 concentration, and,
if applicable, for the hourly average moisture percentage, using Codes
1-55 in Table 4a of this section;
(ix) Identification code for emissions formula used to derive hourly
average CO2 mass emission rate, as provided in Sec. 75.53;
and
(x) Indication of whether the diluent cap was used for
CO2 calculation for the hour.
(2) As an alternative to paragraph (e)(1) of this section, the owner
or operator may use the procedures in Sec. 75.13 and in appendix G to
this part, and shall record daily the following information for
CO2 mass emissions:
(i) Date;
(ii) Daily combustion-formed CO2 mass emissions (tons/
day, rounded to the nearest tenth);
(iii) For coal-fired units, flag indicating whether optional
procedure to adjust combustion-formed CO2 mass emissions for
carbon retained in flyash has been used and, if so, the adjustment;
(iv) For a unit with a wet flue gas desulfurization system or other
controls generating CO2, daily sorbent-related CO2
mass emissions (tons/day, rounded to the nearest tenth); and
(v) For a unit with a wet flue gas desulfurization system or other
controls generating CO2, total daily CO2 mass
emissions (tons/day, rounded to the nearest tenth) as the sum of
combustion-formed emissions and sorbent-related emissions.
(f) Opacity records. The owner or operator shall record opacity data
as specified by the State or local air pollution control agency. If the
State or local air pollution control agency does not specify
recordkeeping requirements for opacity, then record the information
required by paragraphs (f) (1) through (5) of this section for each
affected unit, except as provided in Secs. 75.14(b), (c), and (d). The
owner or operator shall also keep records of all incidents of opacity
monitor downtime during unit operation, including reason(s) for the
monitor outage(s) and any corrective action(s) taken for opacity, as
measured and reported by the continuous opacity monitoring system:
(1) Component/system identification code;
(2) Date, hour, and minute;
(3) Average opacity of emissions for each six minute averaging
period (in percent opacity);
(4) If the average opacity of emissions exceeds the applicable
standard, then a code indicating such an exceedance has occurred; and
(5) Percent monitor data availability (recorded to the nearest tenth
of a percent), calculated according to the requirements of the procedure
recommended for State Implementation Plans in appendix M to part 51 of
this chapter.
(g) Diluent record provisions. The owner or operator of a unit using
a flow monitor and an O2 diluent monitor to determine heat
input, in accordance with Equation F-17 or F-18 of appendix F to this
part, or a unit that accounts for heat input using a flow monitor and a
CO2 diluent monitor (which is used only for heat input
determination and is not used as a CO2 pollutant
concentration monitor) shall keep the following records for the
O2 or CO2 diluent monitor:
(1) Component-system identification code, as provided in Sec. 75.53;
(2) Date and hour;
(3) Hourly average diluent gas (O2 or CO2)
concentration (in percent, rounded to the nearest tenth);
(4) Percent monitor data availability for the diluent monitor
(recorded to the nearest tenth of a percent), calculated pursuant to
Sec. 75.32; and
(5) Method of determination code for diluent gas (O2 or
CO2) concentration data using Codes 1-55, in Table 4a of this
section.
[[Page 292]]
(h) Missing data records. The owner or operator shall record the
causes of any missing data periods and the actions taken by the owner or
operator to correct such causes.
[64 FR 28609, May 26, 1999; 64 FR 37582, July 12, 1999; 67 FR 40440,
June 12, 2002]