Current through Register Vol. 49, No. 13, September 23, 2024
Subpart 1.
Combustion chamber temperature monitor.
The owner or operator of a Class D, III, or IV waste
combustor must install and operate temperature monitors that continuously read
and record the temperature at the point in the combustion unit one second
downstream of the entrance of the last overfre or secondary air injection. The
owner or operator may elect to place temperature monitors at another point
downstream from the entrance of the last overfre or secondary air injection if
the owner or operator conducts mapping of the operating combustion chambers to
develop temperature isopleths and correlates these temperatures to the
downstream temperature monitors. The averaging period for combustion chamber
temperatures must be four-hour arithmetic block averages calculated from four
one-hour arithmetic averages. Each one-hour arithmetic average must consist of
at least ten data points equally spaced in time.
Subp. 2.
Particulate matter control
device temperature monitors.
The owner or operator of a waste combustor must install,
calibrate, maintain, and operate temperature monitors that continuously read
and record the temperatures of the flue gas at the inlet of each particulate
matter control device.
Subp.
3.
Continuous monitors.
The owner or operator of a waste combustor must install,
calibrate, maintain, and operate a continuous monitoring system when burning
solid waste. Monitoring systems that continuously read and record the following
outputs must be installed:
A. in Class
III, A, C, or D waste combustors:
(1) for
carbon monoxide at the waste combustor outlet;
(2) for steam flow or an alternative unit
load measurement parameter as described in part
7011.1265, subpart
4a, in waste combustors that
recover heat with a boiler;
(3)
for flue gas opacity, at a location after which the flue gas has exited the air
pollution control equipment; and
(4) for oxygen or carbon dioxide at each
location where carbon monoxide, sulfur dioxide, or nitrogen oxides emissions
are monitored, to report corrected concentrations of regulated
pollutants;
B. in all
classifications of waste combustors subject to nitrogen oxides emission limits
for nitrogen oxides; and
C. in all
classifications of waste combustors subject to sulfur dioxide emission limits
for sulfur dioxide. For those facilities for which compliance is determined by
the percent reduction of emissions, monitors must be installed at the inlets
and outlets of the air pollution control system.
Subp. 4.
Averaging periods.
Except as provided in this subpart and subparts
4a and
5, parts
7017.1002 to
7017.1220 apply to continuous
monitoring data collection, reduction, and averaging periods.
A. For particulate matter control device
inlet temperature monitoring, four-hour arithmetic block averages calculated
from four consecutive one-hour arithmetic averages.
B. For steam flow or alternative unit load
measurement parameter as described in part
7011.1265, subpart
4a, four-hour arithmetic
block averages.
C. At waste
combustors other than mass burn rotary waterwall combustors or RDF waste
combustors for carbon monoxide, a four-hour block average. For mass burn rotary
waterwall combustors or RDF stokers, the averaging period for carbon monoxide
must be a daily 24-hour arithmetic average measured between 12 midnight and the
following midnight. The four-hour and 24-hour average must be calculated from
one-hour arithmetic averages. At least four points equally spaced in time shall
be used to calculate each one-hour average. During periods of calibration,
quality assurance audits, and routine maintenance, only two data points during
the hour, at least 15 minutes apart, are required to calculate an hourly
average. Each one-hour average must be corrected to seven percent oxygen on an
hourly basis using the one-hour arithmetic average of the oxygen or carbon
dioxide continuous emissions monitoring system.
D. For sulfur dioxide, the geometric average
of the one-hour arithmetic average emission concentration during each 24-hour
daily period measured from midnight to midnight. At least four data points
equally spaced in time shall be used to calculate each one-hour arithmetic
average. During periods of calibration, quality assurance audits, and routine
maintenance, only two data points during the hour, at least 15 minutes apart,
are required to calculate an hourly average. Each one-hour average mustbe
corrected to seven percent oxygen on an hourly basis using the one-hour
arithmetic average of the oxygen or carbon dioxide continuous emissions
monitoring system.
E. For nitrogen
oxides, the arithmetic average of the one-hour arithmetic average emission
concentration during each 24-hour daily period measured from midnight to
midnight. At least four data points equally spaced in time must be used to
calculate each one-hour arithmetic average. During periods of calibration,
quality assurance audits, and routine maintenance, only two data points during
the hour, at least 15 minutes apart, are required to calculate an hourly
average. Each one-hour average must be corrected to seven percent oxygen on an
hourly basis using the one-hour arithmetic average of the oxygen or carbon
dioxide continuous emissions monitoring system.
F. For opacity, a six-minute average,
calculated using 36 or more data points equally spaced over a six-minute
period.
G. For oxygen or carbon
dioxide, a one-hour average.
Subp.
4a.
Calculation of sulfur dioxide and nitrogen oxide
emissions.
A. Compliance with the
sulfur dioxide emission limit and percent reduction must be determined by using
a continuous emission monitor to measure sulfur dioxide and calculating a
24-hour daily geometric mean emission concentration and daily geometric mean
percent reduction using Code of Federal Regulations, title 40, part 60,
Appendix A, Method 19, section 5.4, as amended, to determine the daily
geometric average percent reduction in the potential sulfur dioxide emission
concentration. For waste combustors that do not operate continuously,
compliance must be determined using a daily geometric mean of all hourly
average values for the hours during the day that the facility is
operated.
B. Compliance with the
nitrogen oxides emission standards must be determined by using a continuous
emission monitor for measuring nitrogen oxides and calculating a 24-hour daily
arithmetic average emission concentration using Code of Federal Regulations,
title 40, part 60, Appendix A, Method 19, section 4.1, as amended. For waste
combustors that do not operate continuously, compliance must be determined
using an arithmetic mean of all hourly average values for the hours during the
day that the facility is operated.
Subp. 5.
Installation and operation of
continuous monitors.
The owner or operator of a waste combustor with continuous
monitors must comply with parts
7017.1002 to
7017.1220, except as provided in
items A to I.
A. Following the initial
compliance test as required under part
7011.1270, the owner or operator
of a waste combustor must submit the initial compliance report required under
part 7011.1285, subpart
5.
B. Continuous monitors must be operated to
measure and record data for at least 75 percent of the hours per day for 90
percent of the days of the calendar quarter that the waste combustor is
operating and combusting solid waste.
C. All valid monitoring data must be used to
calculate emission rates, emission reductions, and operating parameters, even
if the conditions of item B are not met.
D. When continuous emissions data for sulfur
dioxide removal efficiency, sulfur dioxide or nitrogen oxide emission rates, or
carbon monoxide are not obtained because of monitor breakdowns, repairs,
calibration checks, and zero and span adjustments, emission data calculations
to determine compliance must be made using the following methods:
(1) for sulfur dioxide removal efficiency or
sulfur dioxide or nitrogen oxide emission concentrations, Code of Federal
Regulations, title 40, part 60, Appendix A, Method 19, as amended, to provide
valid emission data to meet the requirements of item B. Other monitoring
systems or other data collection methods may be used as approved by the
commissioner; and
(2) for carbon
monoxide, Code of Federal Regulations, title 40, part 60, Appendix A, Method
10, as amended, to provide valid emission data to meet the requirements of item
B. Other monitoring systems or other data collection methods may be used as
approved by the commissioner.
E. Zero drift and span drift checks of
emission monitoring systems must be conducted in accordance with Code of
Federal Regulations, title 40, section
60.13, as amended.
F. Span values for continuous monitors must
be as described in subitems (1) to (4). Dual scale monitors may be used to
monitor emissions beyond the ranges specified in subitems (1) to (4).
(1) The span value of the sulfur dioxide
continuous monitors at the inlet to the sulfur dioxide control device must be
125 percent of the maximum estimated hourly potential sulfur dioxide emissions
of the waste combustor unit, and the span value of the monitor at the outlet of
the sulfur dioxide control device must be 50 percent of the maximum estimated
hourly potential sulfur dioxide emissions of the waste combustor
unit.
(2) The span value of the
nitrogen oxides continuous monitors must be 125 percent of the maximum
estimated hourly potential nitrogen oxides emissions of the waste combustor
unit.
(3) The span value of the
oxygen or carbon dioxide monitor must be 25 percent oxygen or carbon
dioxide.
(4) The span value of the
carbon monoxide monitor must be 125 percent of the maximum estimated hourly
potential carbon monoxide emissions of the waste combustor unit.
G. Quarterly accuracy
determinations, daily calibration drift tests, and annual relative accuracy
test audits must be performed according to Code of Federal Regulations, title
40, part 60, Appendix F, as amended, for sulfur dioxide, nitrogen oxides,
carbon monoxide, and oxygen or carbon dioxide, except that section 5.1.1
(relative accuracy test audit) does not apply to the oxygen monitor.
H. The procedures under Code of Federal
Regulations, title 40, section
60.13, as amended, must be
followed for installation, evaluation, and operation of continuous emissions
monitoring systems for sulfur dioxide, nitrogen oxides, opacity, and oxygen or
carbon dioxide.
I. The oxygen or
carbon dioxide monitor must conform to Performance Specification 3 in Code of
Federal Regulations, title 40, part 60, Appendix B, as amended, except that
section.
23 does not
apply.
Subp. 6.
Recording data from continuous monitoring.
The owner or operator of a waste combustor must maintain a
permanent record of continuously measured parameters. The record of monitoring
must contain:
A. the calendar
date;
B. the following measurements
recorded in a manner that allows the data to be immediately accessed upon
inspection by the commissioner:
(1) all
six-minute opacity readings;
(2)
all one-hour average sulfur dioxide emission concentrations at the inlet and
outlet of the acid gas control device if compliance is based on a percent
reduction, or at the outlet only if compliance is based on the outlet emission
limit; and
(3) all one-hour average
carbon monoxide and nitrogen oxide emission concentrations, steam flow or
alternative unit load measurement parameter as described in part
7011.1265, subpart
4a, combustion chamber
temperature, and particulate matter control device temperatures; and
C. the following average
concentrations and parameters:
(1) all
24-hour daily geometric average percent reductions in sulfur dioxide emissions
or all 24-hour daily geometric average sulfur dioxide emission concentrations,
as applicable;
(2) all 24-hour
daily arithmetic average nitrogen oxides emission concentrations;
(3) all four-hour block or 24-hour daily
arithmetic average carbon monoxide emission concentrations, as applicable;
and
(4) all four-hour block
arithmetic average unit load levels and particulate matter control device inlet
temperatures.
Subp.
7.
Exceedances of continuously monitored emission
limits.
If accurate and valid data results collected from continuous
monitors for sulfur dioxide, nitrogen oxides, or carbon monoxide data exceed
emission limits established in part
7011.1225 or in the waste
combustor's permit after normal start-up, the waste combustor owner or operator
must take the following actions:
A.
The exceedance must be reported to the commissioner as soon as reasonably
possible, giving consideration to matters of plant or worker safety or access
to communications.
B. Appropriate
repairs or modifications to return the waste combustor to compliance must be
commenced within 72 hours of the exceedance.
C. If the waste combustor cannot be returned
to compliance within 72 hours of the exceedance occurring, the waste combustor
must be shut down. If the modifications to return the waste combustor to
compliance require amending the air emission facility permit, the waste
combustor must shut down within 72 hours of the exceedance.
D. When repairs or modifications have been
completed, the waste combustor owner or operator must demonstrate to the
commissioner that the waste combustor is in compliance. The waste combustor may
be started up after the owner or operator notifies the commissioner in writing
of the date the owner or operator plans to start up the waste combustor and the
date that compliance testing is scheduled. Notification must be given at least
ten days in advance of the compliance test date.
Statutory Authority: MS s
116.07
