(a) Separately for 29 FCCU Stack (EPN 29P1) and 40
FCCU Stack (EPN 40P1), the owner or operator shall install, operate,
calibrate, and maintain a continuous emissions monitoring system (CEMS)
as specified in 40 Code of Federal Regulations (CFR) §60.105a(g)(1),
(2) and (5) regardless of whether these provisions otherwise apply
or provide exemptions for certain activities; use an analyzer with
a minimum analyzer accuracy of plus or minus (±)2.5%, a dedicated
totalizing gas flow measurement system with a minimum measurement
accuracy of ±5%, and temperature monitor with a minimum accuracy
of ±1%; convert data from all monitoring devices to a common
concentration, flow, pressure, and temperature measurement basis and
calculate and record 15-minute and subsequent block one-hour average
sulfur dioxide (SO2) emissions.
(b) Separately for SRU Incinerator (EPN 34I1) and SCOT
Unit Incinerator (EPN 43I1), the owner or operator shall install,
operate, calibrate, and maintain a CEMS as specified in 40 Code of
Federal Regulations (CFR) §60.106a(a), regardless of whether
these provisions otherwise apply; use an analyzer with an accuracy
of plus or minus (±)2.5%, a dedicated totalizing gas flow measurement
system with an accuracy of ±5%, and temperature monitor with
an accuracy of ±1%; convert data from all monitoring devices
to a common concentration, flow, pressure, and temperature measurement
basis and calculate and record 15-minute and subsequent block one-hour
average SO2 emissions.
(c) The owner or operator shall install, operate, calibrate,
and maintain dedicated instrumentation according to the manufacturers'
specifications to continuously and separately monitor the flow rate
and the total sulfur concentration of the inlet gas streams of EPN
66FL1, EPN 66FL2, EPN 66FL3, and EPN 66FL12, in accordance with the
40 CFR §60.107a(e) and (f)(1), regardless of whether these provisions
otherwise apply or provide an exemption for any flare activities,
as follows:
(1) monitor the total volumetric flow rate of gases
routed to each flare using a separate dedicated totalizing gas flow
meter with an accuracy of ±5%;
(2) monitor the temperature of gases routed to each
flare using a separate temperature measurement device with an accuracy
of ±1%; and
(3) monitor the sulfur content of the combined inlet
flare gas stream as follows:
(A) using a separate dedicated analyzer capable of
accurately measuring and recording total sulfur (including SO2, hydrogen sulfide (H2S),
and organic sulfur compounds levels) with an accuracy of ±5%
on a continuous basis, the sulfur concentration must be determined
in accordance 40 CFR §60.107a(e)(1) regardless of applicability
or exemptions, and determine hourly SO2 emissions
using the following equation; or
Attached Graphic
(B) using a separate dedicated analyzer capable of
accurately measuring and recording H2S
to an accuracy of ±5% on a continuous basis, determine the
H2S concentration in the flared gas stream,
derive an inlet flare gas total sulfur concentration for each monitored
hourly H2S concentration in accordance
40 CFR §60.107a(e)(2) methodology regardless of applicability
or exemptions, and calculate the SO2 emissions
from each flare for each operating hour using the following equation:
Attached Graphic
(d) The owner or operator shall continuously monitor
the flow rate, temperature, and total sulfur or H2S
concentration in the gases combusted by each affected EPN listed in §112.230(b)(6)
and (7) of this title (relating to Applicability), in accordance with
40 CFR §60.107a(a), (e) and (f)(1), except for the SRU Incinerator
(EPN 34I1) and SCOT SRU Incinerator (EPN 43I1) that must be monitored
under §112.233(b), as follows:
(1) monitor the total volumetric fuel flow to each
combustion device using a separate dedicated totalizing gas flow meter
with an accuracy of ±5%; each fuel flow meter must be installed,
calibrated, maintained, and operated per the manufacturer's recommendations
and specifications;
(2) monitor the fuel temperature using a separate dedicated
temperature monitor with an accuracy of ±1%; that is installed,
calibrated, maintained, and operated according to the manufacturer's
recommendations and specifications; if the fuel temperature does not
vary by more than ±1% throughout a common fuel supply system,
the fuel temperature for each affected source supplied by the fuel
supply system may be monitored at a single location; and
(3) monitor the fuel sulfur content either directly
with a total sulfur analyzer or by monitoring the surrogate H2S concentration as follows:
(A) if a total sulfur analyzer is used, calculate the
emissions using the following equation; or
Attached Graphic
(B) if the H2S concentration
is monitored as a surrogate for the total sulfur content, calculate
the SO2 emissions as follows:
(i) collect at least one sample each month; the frequency
of sampling may be reduced to no less than one time per calendar quarter
if three consecutive monthly samples indicate that H2S makes up 90.0 mole % or more of the total
sulfur compounds in the fuel gas sample, and shall revert from quarterly
to monthly when quarterly sample sulfur compounds consist of less
than 90.0 mole % H2S;
(ii) have the samples analyzed for total sulfur and
H2S concentrations;
(iii) use the following equation to calculate total
SO2 emissions.
Attached Graphic
(iv) sum the emissions for each affected source in §112.230(b)(6)
of this title as calculated in §112.233(b) and (d) of this section
to determine compliance with the total EPN FLEX_R_CAP SO2 hourly emission limit; and
(v) sum the emissions for each affected source in §112.230(b)(7)
of this title as calculated in §112.233(d) of this title to determine
compliance with the total EPN FLEX_MS_CAP SO2 hourly
emissions limit.
(e) Continuous monitoring data collected in accordance
with requirements in this section must undergo an appropriate quality
assurance and quality control process and be validated for at least
95% of the time that the monitored emission point has emissions; an
owner or operator must utilize an appropriate data substitution process
based on the most accurate methodology available, which is at least
equivalent to engineering judgement, to obtain all missing or invalidated
monitoring data for the remaining period the monitored emission point
has emissions.
(f) Minor modifications to monitoring methods may be
approved by the executive director. Monitoring methods other than
those specified in this section may be used if approved by the executive
director and validated by 40 CFR Part 63, Appendix A, Test Method
301. For the purposes of this subsection, substitute "executive director"
in each place that Test Method 301 references "administrator." These
validation procedures may be waived by the executive director or a
different protocol may be granted for site-specific applications.
Minor modifications that may be approved under this subsection include
increases in the frequency of monitoring and the replacement of parametric
monitoring with direct emissions monitoring with a CEMS provided appropriate
quality assurance control, accuracy specifications, and data validation
requirements are specified and no less stringent than monitoring requirements
for a comparable EPN in this division.
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