Terms used in this subpart are defined in the Clean Air Act, in Sec. 63.2, and in this section as follows:
Chlorine plant bypass scrubber means the wet scrubber that captures chlorine gas during a chlorine plant shut down or failure.
Deviation means any instance in which an affected source subject to this subpart, or an owner or operator of such a source:
(1) Fails to meet any requirement or obligation established by this subpart, including but not limited to any emission limitation (including operating limits) or operation and maintenance requirement;
(2) Fails to meet any term or condition that is adopted to implement an applicable requirement in this subpart and that is included in the operating permit for any affected source required to obtain such a permit; or
(3) Fails to meet any emission limitation in this subpart during startup, shutdown, or malfunction, regardless of whether or not such failure is permitted by this subpart.
Emission limitation means any emission limit, opacity limit, or operating limit.
Launder off-gas system means a system that collects chlorine and hydrochloric acid fumes from collection points within the melt/reactor system building. The system then removes particulate matter and hydrochloric acid from the collected gases prior to discharge to the atmosphere.
Magnesium chloride storage bins means vessels that store dried magnesium chloride powder produced from the spray drying operation.
Melt/reactor system means a system that melts and chlorinates dehydrated brine to produce high purity molten magnesium chloride feed for electrolysis.
Primary magnesium refining means the production of magnesium metal and magnesium metal alloys from natural sources of magnesium chloride such as sea water or water from the Great Salt Lake and magnesium bearing ores.
Responsible official means responsible official as defined in Sec. 63.2.
Spray dryer means dryers that evaporate brine to form magnesium powder by contact with high temperature gases exhausted from gas turbines.
Wet scrubber means a device that contacts an exhaust gas with a liquid to remove particulate matter and acid gases from the exhaust. Examples are packed-bed wet scrubbers and venturi scrubbers.
Work practice standard means any design, equipment, work practice, or operational standard, or combination thereof, that is promulgated pursuant to section 112(h) of the Clean Air Act.
Sec. Table 1 to Subpart TTTTT of Part 63--Emission Limits
As required in Sec. 63.9890(a), you must comply with each applicable emission limit in the following table: ------------------------------------------------------------------------
You must comply with each of the
For. . . following. . .------------------------------------------------------------------------1. Each spray dryer stack.... a. You must not cause to be discharged to
the atmosphere any gases that contain
particulate matter in excess of 100 lbs/
hr; and
b. You must not cause to be discharged to
the atmosphere any gases that contain
hydrochloric acid in excess of 200 lbs/
hr.2. Each magnesium chloride a. You must not cause to be discharged to
storage bins scrubber stack. the atmosphere any gases that contain
hydrochloric acid in excess of 47.5 lbs/
hr and 0.35 gr/dscf; and
b. You must not cause to be discharged to
the atmosphere any gases that contain
PM10 in excess of 2.7 lbs/hr and 0.016
gr/dscf.3. Each melt/reactor system a. You must not cause to be discharged to
stack. the atmosphere any gases that contain
PM10 in excess of 13.1 lbs/hr; and
b. You must not cause to be discharged to
the atmosphere any gases that contain
hydrochloric acid in excess of 7.2 lbs/
hr; and
c. You must not cause to be discharged to
the atmosphere any gases that contain
chlorine in excess of 100 lbs/hr; and
d. You must not cause to be discharged to
the atmosphere any gases that contain 36
ng TEQ/dscm corrected to 7% oxygen.4. Each launder off-gas a. You must not cause to be discharged to
system stack. the atmosphere any gases that contain
particulate matter in excess of 37.5 lbs/
hr; and
b. You must not cause to be discharged to
the atmosphere any gases that contain
hydrochloric acid in excess of 46.0 lbs/
hr; and
c. You must not cause to be discharged to
the atmosphere any gases that contain
chlorine in excess of 26.0 lbs/hr.------------------------------------------------------------------------
Sec. Table 2 to Subpart TTTTT of Part 63--Toxic Equivalency Factors ------------------------------------------------------------------------
Toxic
Dioxin/furan congener equivalency
factor------------------------------------------------------------------------2,3,7,8-tetrachlorinated dibenzo-p-dioxin.............. 11,2,3,7,8-pentachlorinated dibenzo-p-dioxin............ 11,2,3,4,7,8-hexachlorinated dibenzo-p-dioxin........... 0.11,2,3,7,8,9-hexachlorinated dibenzo-p-dioxin........... 0.11,2,3,6,7,8-hexachlorinated dibenzo-p-dioxin........... 0.11,2,3,4,6,7,8-heptachlorinated dibenzo-p-dioxin........ 0.01octachlorinated dibenzo-p-dioxin....................... 0.00012,3,7,8-tetrachlorinated dibenzofuran.................. 0.12,3,4,7,8-pentachlorinated dibenzofuran................ 0.51,2,3,7,8-pentachlorinated dibenzofuran................ 0.051,2,3,4,7,8-hexachlorinated dibenzofuran............... 0.11,2,3,6,7,8-hexachlorinated dibenzofuran............... 0.11,2,3,7,8,9-hexachlorinated dibenzofuran............... 0.12,3,4,6,7,8-hexachlorinated dibenzofuran............... 0.11,2,3,4,6,7,8-heptachlorinated dibenzofuran............ 0.011,2,3,4,7,8,9-heptachlorinated dibenzofuran............ 0.01octachlorinated dibenzofuran........................... 0.0001------------------------------------------------------------------------
Sec. Table 3 to Subpart TTTTT of Part 63--Initial Compliance With
Emission Limits
As required in 63.9916, you must demonstrate initial compliance with the emission limits according to the following table: ------------------------------------------------------------------------
You have demonstrated initial compliance
For. . . if. . .------------------------------------------------------------------------1. Each spray dryer stack.... a. The average mass flow of particulate
matter from the control system applied
to emissions from each spray dryer,
measured according to the performance
test procedures in Sec. 63.9913(c), did
not exceed 100 lbs/hr; and
b. The average mass flow of hydrochloric
acid from the control system applied to
emissions from each spray dryer,
determined according to the performance
test procedures in Sec. 63.9914(c), did
not exceed 200 lbs/hr.2. Each magnesium chloride a. The average mass flow of hydrochloric
storage bin scrubber stack. acid from the control system applied to
the magnesium chloride storage bins
scrubber exhaust, measured according to
the performance test procedure in Sec.
63.9914, did not exceed 47.5 lbs/hr and
0.35 gr/dscf; and
b. The average mass flow of PM10 from the
control system applied to the magnesium
chloride storage bins scrubber exhaust,
determined according to the performance
test procedures in Sec. 63.9913, did
not exceed 2.7 lbs/hr and 0.016 gr/dscf.3. Each melt/reactor system a. The average mass flow of PM10 from the
stack. control system applied to the melt/
reactor system exhaust, measured
according to the performance test
procedures in Sec. 63.9913, did not
exceed 13.1 lbs/hr; and
b. The average mass flow of hydrochloric
acid from the control system applied to
the melt/reactor system exhaust,
measured according to the performance
test procedures in Sec. 63.9914, did
not exceed 7.2 lbs/hr; and
c. The average mass flow of chlorine from
the control system applied to the melt/
reactor system exhaust, measured
according to the performance test
procedures in Sec. 63.9914, did not
exceed 100 lbs/hr.
d. The average concentration of dioxins/
furans from the control system applied
to the melt/reactor system exhaust,
measured according to the performance
test procedures in Sec. 63.9915, did
not exceed 36 ng TEQ/dscm corrected to
7% oxygen.4. Each launder off-gas a. The average mass flow of particulate
system stack. matter from the control system applied
to the launder off-gas system collection
system exhaust, measured according to
the performance test procedures in Sec.
63.9913, did not exceed 37.5 lbs/hr; and
b. The average mass flow of hydrochloric
acid from the control system applied to
the launder off-gas system collection
system exhaust, measured according to
the performance test procedures in Sec.
63.9914, did not exceed 46.0 lbs/hr; and
c. The average mass flow of chlorine from
the control system applied to the
launder off-gas system collection system
exhaust, measured according to the
performance test procedures in Sec.
63.9914, did not exceed 26.0 lbs/hr.------------------------------------------------------------------------
Sec. Table 4 to Subpart TTTTT of Part 63--Continuous Compliance With
Emission Limits
As required in Sec. 63.9923, you must demonstrate continuous compliance with the emission limits according to the following table: ------------------------------------------------------------------------
You must demonstrate continuous
For. . . compliance by. . .------------------------------------------------------------------------1. Each spray dryer stack.... a. Maintaining emissions of PM10 at or
below 100 lbs/hr; and
b. Maintaining emissions of hydrochloric
acid at or below 200 lbs/hr; and
c. Conducting subsequent performance
tests at least twice during each term of
your title V operating permit (at mid-
term and renewal).2. Magnesium chloride storage a. Maintaining emissions of hydrochloric
bins scrubber stack. acid at or below 47.5 lbs/hr and 0.35 gr/
dscf; and
b. Maintaining emissions of PM10 at or
below 2.7 lbs/hr and 0.016 gr/dscf; and
c. Conducting subsequent performance
tests at least twice during each term of
your title V operating permit (at mid-
term and renewal).3. Each melt/reactor system a. Maintaining emissions of PM10 at or
stack. below 13.1 lbs/hr; and
b. Maintaining emissions of hydrochloric
acid at or below 7.2 lbs/hr; and
c. Maintaining emissions of chlorine at
or below 100 lbs/hr; and
d. Maintaining emissions of dioxins/
furans at or below 36 ng TEQ/dscm
corrected to 7% oxygen.
e. Conducting subsequent performance test
at least twice during each term of your
title V operating permit (at mid-term
and renewal).4. Each launder off-gas a. Maintaining emissions of particulate
system stack. matter at or below 37.5 lbs/hr; and
b. Maintaining emissions of hydrochloric
acid at or below 46.0 lbs/hr; and
c. Maintaining emissions of chlorine at
or below 26.0 lbs/hr; and
d. Conducting subsequent performance
tests at least twice during each term of
your title V operating permit (at mid-
term and renewal).------------------------------------------------------------------------
Sec. Table 5 to Subpart TTTTT of Part 63--Applicability of General
Provisions to Subpart TTTTT of Part 63
As required in Sec. 63.9950, you must comply with the requirements of the NESHAP General Provisions (40 CFR part 63, subpart A) shown in the following table: ----------------------------------------------------------------------------------------------------------------
Citation Subject Applies to Subpart TTTTT Explanation----------------------------------------------------------------------------------------------------------------63.1............................... Applicability......... Yes.63.2............................... Definitions........... Yes.63.3............................... Units and Yes.
Abbreviations.63.4............................... Prohibited Activities. Yes.63.5............................... Construction and Yes.
Reconstruction.
63.6(a)-(g)........................ Compliance with Yes.
Standards and
Maintenance
Requirements.63.6(h)............................ Determining Compliance No.
with Opacity and
Visible Emission
Standards.63.6(i)-(j)........................ Extension of Yes.
Compliance and
Presidential
Compliance Exemption.63.7(a)(1)-(2)..................... Applicability and No Subpart TTTTT
Performance Test specifies performance
Dates. test applicability
and dates.63.7(a)(3), (b)-(h)................ Performance Testing Yes.
Requirements.63.8 except for (a)(4),(c)(4), and Monitoring Yes.
(f)(6). Requirements.63.8(a)(4)......................... Additional Monitoring No......................... Subpart TTTTT does not
(6). Requirements.63.8(a)(4)......................... Additional Monitoring No......................... Subpart TTTTT does not
Requirements for require flares.
Control Devices in
Sec. 63.11.63.8(c)(4)......................... Continuous Monitoring No......................... Subpart TTTTT
System Requirements. specifies
requirements for
operation of CMS.63.8(f)(6)......................... Relative Accuracy Test No......................... Subpart TTTTT does not
Alternative (RATA). require continuous
emission monitoring
systems.63.9............................... Notification Yes.
Requirements.63.9(g)(5)......................... Data Reduction........ No......................... Subpart TTTTT
specifies data
reduction
requirements.63.10 except for (b)(2)(xiii) and Recordkeeping and Yes.
(c)(7)-(8). Reporting
(7)-(8). Reporting
Requirements.63.10(b)(2)(xiii).................. Continuous Monitoring No......................... Subpart TTTTT does not
System (CMS) Records require continuous
for RATA Alternative. emission monitoring
systems.63.10(c)(7)-(8).................... Records of Excess No......................... Subpart TTTTT
Emissions and specifies
Parameter Monitoring recordkeeping
Accedences for CMS. requirements.63.11.............................. Control Device No......................... Subpart TTTTT does not
Requirements. require flares.63.12.............................. State Authority and Yes.
Delegations.63.13-63.15........................ Addresses, Yes.
Incorporation by
Reference,
Availability of
Information.---------------------------------------------------------------------------------------------------------------- Subpart UUUUU_National Emission Standards for Hazardous Air Pollutants:
Coal- and Oil-Fired Electric Utility Steam Generating Units
Source: 77 FR 9464, Feb. 16, 2012, unless otherwise noted.
What This Subpart Covers