A. The source owner or operator shall operate
the CEMS and record accurate data in the units of the applicable standard
during all source operating times, except for periods when the CEMS is subject
to established quality assurance and quality control procedures or during
periods of unavoidable malfunction. Any emissions data collected during periods
when an emissions unit is not operating, shall not be used in determining
compliance with any emission limit.
B. Any
CEMS installed pursuant to this
Chapter shall meet the performance specifications set forth in 40 CFR Part
60,
Appendix B, 40 CFR Part
75 and comply with applicable specifications and
provisions of 40 CFR Part
60, Appendix B, regarding monitor location,
calibration and interpretation of results. Data used for calculating excess
emissions shall not include data substitution using the missing data procedures
of 40 CFR Part
75; nor shall the data have been bias adjusted according to the
procedures of 40 CFR Part
75. Missing data shall be reported as downtime for
the purposes of this Chapter.
C.
For a
CEMS installed pursuant to this Chapter, the following minimum
specifications apply unless otherwise specified by federal regulation.
(1) The minimum specifications described in
40 CFR Part
60, Appendix B are incorporated herein by reference.
(2) A
CERMS or
gaseous CEMS shall record and
report valid data as follows:
(a) A CEMS must
complete a minimum of one cycle of operation (sampling, analyzing and data
recording) for each of the four successive 15-minute quadrants of the hour
(starting at the top of the clock hour), except during hours where scheduled QA
is being performed. A minimum of one data point in at least three of the four
distinct 15-minute quadrants constitutes a valid hour. During periods of
scheduled QA a minimum of one data point in at least two of the four distinct
15-minute quadrants constitutes a valid hour.
(b) A
gaseous CEMS and
CERMS must average and
record the data in a manner consistent with the applicable emission standard.
Data need not be recorded for a particular time period if the emissions unit
did not operate during that time period.
(i)
A three-hour block average will be considered valid if it contains at least 2
valid hourly averages.
(ii) A
four-hour block average will be considered valid if it contains at least 3
valid hourly averages.
(iii) A
six-hour block average will be considered valid if it contains at least 4 valid
hourly averages.
(iv) A twelve-hour
block average will be considered valid if it contains at least 9 valid hourly
averages.
(v) A twenty-four-hour
average will be considered valid if it contains at least 18 valid hourly
averages.
(vi) A thirty-day rolling
average shall be calculated as described in 40 CFR Part
60, Method 19, equation
19-19. Simply stated that means: the sum of the (valid) block hour values
monitored for the last 30 emissions unit operating days divided by the sum of
the number of (valid) block hours monitored for the past 30 emissions unit
operating days.
(3) A CEMS for measuring opacity, particulate
matter or gaseous emissions shall have the capability of displaying
instantaneous values of the appropriate output for use during audits. Audit
readings should be taken from the normal data recording equipment if
practical.
(4) A COMS used to
determine compliance with applicable opacity standards shall average data to
result in one or six-minute averages (starting at the top of the clock hour),
as approved by the Department and EPA. A valid six-minute average requires four
valid minutes of data. A valid minute consists of a minimum of a sample point
in four of the six distinct 10 (ten) second blocks or 67 percent of the
minute.
(5) A PM CEMS shall average
data as approved by the Department and EPA.
D.
Out-of-Control Period
Determinations
(1) A
gaseous CEMS is
out-of-control when:
(a) The
calibration
drift exceeds two times the applicable performance specification drift limit
contained in 40 CFR Part
60, Appendix B, for five consecutive days;
(b) The
calibration drift exceeds four times
the applicable performance specification drift limit contained in 40 CFR Part
60, Appendix B, on any one day; or
(c) The
CEMS fails a
Relative Accuracy Test
Audit,
Relative Accuracy Audit, or Cylinder Gas Audit.
The beginning of the out-of-control period is the time
corresponding to the completion of the fifth consecutive, daily calibration
drift check with a calibration drift in excess of two times the allowable
limit, or the time corresponding to the completion of the daily calibration
drift check preceding the daily calibration drift check that results in a
calibration drift in excess of four times the allowable limit, or the time
corresponding to the completion of a Relative Accuracy Test Audit (RATA),
Relative Accuracy Audit (RAA), or cylinder gas audit (CGA) where the CEMS fails
the applicable accuracy criteria.
The end of the out-of-control period is the time
corresponding to the completion of the calibration drift check following
corrective action that results in the calibration drifts at both the zero (or
low-level) and high-level measurement points being within the corresponding
allowable calibration drift limits, or the time corresponding to the completion
of the sampling of the subsequent successful RATA, RAA, or CGA. A RATA must
always be used following an out-of-control period resulting from a failed
RATA.
(d) If a source's
CEMS is also subject to the requirements in 40 CFR Part
75 then the source may
use the procedures outlined in Part 75, Appendices A and B instead of the
procedures above to determine out-of-control periods for that
CEMS.
(2) A
COMS is out-of-control when:
(a) The calibration drift (either zero or
upscale) exceeds 2% opacity for five consecutive days;
(b) The calibration drift (either zero or
upscale) exceeds 4% opacity on any one day; or
(c) The
COMS fails a performance audit.
The beginning of the out-of-control period is the time
corresponding to the completion of the fifth consecutive daily calibration
drift check with a calibration drift in excess of 2%, or the time corresponding
to the completion of the daily calibration drift check preceding the daily
calibration drift check that results in a calibration drift in excess of 4%, or
the time corresponding to the completion of the performance audit indicating
unacceptable performance.
The end of the out-of-control period is the time
corresponding to the completion of appropriate adjustment and calibration drift
assessment, or the time corresponding to the completion of appropriate
corrective actions and subsequent successful audit. A performance audit must
always be used following an out-of-control period resulting from a failed
performance audit.
(3) A
CERMS is out-of-control when:
(a) The
calibration drift for either the flow
or concentration portion of the system exceeds two times the applicable
performance specification drift limit contained in
40 CFR Part[DEGREE]60,
Appendix B, for five consecutive days;
(b) The
calibration drift for either the flow
or concentration portion of the system exceeds four times the applicable
performance specification drift limit contained in 40 CFR Part
60, Appendix B,
on any one day; or
(c) The
CERMS
fails a
Relative Accuracy Test Audit,
Relative Accuracy Audit, or Cylinder Gas
Audit.
The beginning of the out-of-control period is the time
corresponding to the completion of the fifth consecutive, daily calibration
drift check with a calibration drift in excess of two times the allowable
limit, or the time corresponding to the completion of the daily calibration
drift check preceding the daily calibration drift check that results in a
calibration drift in excess of four times the allowable limit, or the time
corresponding to the completion of a Relative Accuracy Test Audit (RATA),
Relative Accuracy Audit (RAA), or cylinder gas audit (CGA) where the CERMS
fails the applicable accuracy criteria.
The end of the out-of-control period is the time
corresponding to the completion of the calibration drift check following
corrective action that results in the calibration drifts at both the zero (or
low-level) and high-level measurement points being within the corresponding
allowable calibration drift limits, or the time corresponding to the completion
of the sampling of the subsequent successful RATA, RAA, or CGA. A RATA must
always be used following an out-of-control period resulting from a failed
RATA.
(d) If a source's
CERMS is also subject to the requirements in 40 CFR Part
75 then the source may
use the procedures outlined in 40 CFR Part
75, Appendices A and B instead of
the procedures above to determine out-of-control periods for that
CERMS.
(4) A PM
CEMS is
out-of-control when:
(a) The daily
calibration drift (zero or upscale) exceeds 4% for five consecutive daily
periods or exceeds 8% for any one day;
(b) The daily calibration drift for sample
volume check exceeds 10% for five consecutive daily periods or exceeds 20% for
any one day;
(c) The ACA (Absolute
Correlation Audit) exceeds 10% of the average audit value or 7.5% of the
applicable standard, whichever is greater;
(d) The SVA (Sample Volume Audit) exceeds 5%
of the average sample volume audit value;
(e) The RCA (Response Correlation Audit)
response value for any of the 12 points is greater than the greatest PM CEMS
response value used to develop the correlation curve;
(f) The RCA response value for less than 9 of
the 12 points lie within the PM CEMS output range used to develop the
correlation curve;
(g) The RCA
response values and reference method measurements do not fall within a
specified area on a graph of the correlation regression line for 75% of the
data sets. The specified area on the graph of the correlation regression line
is defined by two lines parallel to the correlation regression line, offset at
a distance of +/- 25% of the numerical emission limit value from the
correlation regression line;
(h)
The RRA (Relative Response Audit) response value for any of the 3 points is
greater than the greatest PM CEMS response value used to develop the
correlation curve;
(i) The RRA
response value for 2 of the 3 points lie outside the PM CEMS output range used
to develop the correlation curve; or
(j) The RRA response values and reference
method measurements do not fall within a specified area on a graph of the
correlation regression line for 2 of the 3 data sets. The specified area on the
graph of the correlation regression line is defined by two lines parallel to
the correlation regression line, offset at a distance of +/- 25% of the
numerical emission limit value from the correlation regression line.
(k) The beginning of the
out-of-control
period is the time corresponding to the completion of a failed drift check,
RCA,
RRA,
ACA,
SVA or sample volume check. The end of the
out-of-control period
is the time corresponding to the completion of appropriate adjustment and
calibration drift assessment, or the time corresponding to the completion of
appropriate corrective actions and subsequent successful audit. A performance
audit must always be used following an
out-of-control period resulting from a
failed performance audit.
NOTE: Section 3(C) defines whether data is considered "valid"
for purposes of determining compliance with applicable emissions limits. By
contrast, any data recorded by a CEMS that is valid may be considered in
determining CEMS uptime.
