operator shall continuously monitor pressure drop through the absorber
and meet the requirements specified in paragraphs (d)(1) through (4) of
this section.
    (1) The owner or operator shall install, calibrate, maintain, and
operate a continuous monitoring system (CMS) that continuously measures
and permanently records the pressure at the gas stream inlet and outlet
of the absorber. The pressure at the gas stream inlet of the absorber
may be measured using amperage on the blower if a correlation between
pressure and amperage is established.
    (2) The CMS must have an accuracy of  5 percent over
the normal range measured or 0.12 kilopascals (0.5 inches of water
column), whichever is greater.
    (3) The owner or operator shall establish an allowable range for
the pressure drop through the absorber. The allowable range is 20 percent of the arithmetic average of the three test runs
conducted during the performance test required in Sec.  60.8. The
Administrator retains the right to reduce the 20 percent
adjustment to the baseline average values of operating ranges in those
instances where performance test results indicate that a source's level
of emissions is near the value of an applicable emissions standard.
However, the adjustment must not be reduced to less than 10
percent under any instance.
    (4) The owner or operator shall demonstrate continuous compliance
by maintaining the daily average pressure drop through the absorber to
within the allowable range established in paragraph (d)(3) of this
section. The daily average pressure drop through the absorber for each
operating day shall be calculated using the data recorded by the
monitoring system. If the emissions unit operation is continuous, the
operating day is a 24-hour period. If the emissions unit operation is
not continuous, the operating day is the total number of hours of
control device operation per 24-hour period. Valid data points must be
available for 75 percent of the operating hours in an operating day to
compute the daily average.
0
15. Subpart W is amended by adding Sec.  60.235 to read as follows:

Sec.  60.235  Recordkeeping.

    Any facility under Sec.  60.230(a) that commences construction,
modification, or reconstruction after [date of publication of the final
rule in the Federal Register] is subject to the requirements of this
section. You must maintain the records identified as specified in Sec.
60.7(f) and in paragraphs (a) and (b) of this section. All records
required by this subpart must be maintained onsite for at least 5
years.
    (a) Records of the daily average pressure drop through the
absorber.
    (b) Records of deviations. A deviation is determined to have
occurred when the monitoring data or lack of monitoring data result in
any one of the criteria specified in paragraphs (b)(1) and (2) of this
section being met.
    (1) A deviation occurs when the daily average value of a monitored
operating parameter is less than the minimum pressure drop, or greater
than the maximum pressure drop established in Sec.  60.233(d)(3).
    (2) A deviation occurs when the monitoring data are not available
for at least 75 percent of the operating hours in a day.

Subpart X--Standards of Performance for the Phosphate Fertilizer
Industry: Granular Triple Superphosphate Storage Facilities

0
16. Section 60.243 is amended by revising paragraph (c) and adding (e)
to read as follows:

Sec.  60.243  Monitoring of operations.

* * * * *
    (c) Except as specified in paragraph (e) of this section, the owner
or operator of any granular triple superphosphate storage facility
subject to the provisions

of this subpart shall install, calibrate, maintain, and operate a
monitoring device which continuously measures and permanently records
the total pressure drop across any absorber. The monitoring device
shall have an accuracy of 5 percent over its operating
range.
* * * * *
    (e) Any facility under Sec.  60.240(a) that commences construction,
modification, or reconstruction after [date of publication of the final
rule in the Federal Register] is subject to the requirements of this
paragraph instead of the requirements in paragraph (c) of this section.
If an absorber is used to comply with Sec.  60.232, then the owner or
operator shall continuously monitor pressure drop through the absorber
and meet the requirements specified in paragraphs (e)(1) through (4) of
this section.
    (1) The owner or operator shall install, calibrate, maintain, and
operate a continuous monitoring system (CMS) that continuously measures
and permanently records the pressure at the gas stream inlet and outlet
of the absorber. The pressure at the gas stream inlet of the absorber
may be measured using amperage on the blower if a correlation between
pressure and amperage is established.
    (2) The CMS must have an accuracy of  5 percent over
the normal range measured or 0.12 kilopascals (0.5 inches of water
column), whichever is greater.
    (3) The owner or operator shall establish an allowable range for
the pressure drop through the absorber. The allowable range is 20 percent of the arithmetic average of the three test runs
conducted during the performance test required in Sec.  60.8. The
Administrator retains the right to reduce the 20 percent
adjustment to the baseline average values of operating ranges in those
instances where performance test results indicate that a source's level
of emissions is near the value of an applicable emissions standard.
However, the adjustment must not be reduced to less than 10
percent under any instance.
    (4) The owner or operator shall demonstrate continuous compliance
by maintaining the daily average pressure drop through the absorber to
within the allowable range established in paragraph (e)(3) of this
section. The daily average pressure drop through the absorber for each
operating day shall be calculated using the data recorded by the
monitoring system. If the emissions unit operation is continuous, the
operating day is a 24-hour period. If the emissions unit operation is
not continuous, the operating day is the total number of hours of
control device operation per 24-hour period. Valid data points must be
available for 75 percent of the operating hours in an operating day to
compute the daily average.
0
17. Subpart X is amended by adding Sec.  60.245 to read as follows:

Sec.  60.245  Recordkeeping.

    Any facility under Sec.  60.240(a) that commences construction,
modification, or reconstruction after [date of publication of the final
rule in the Federal Register] is subject to the requirements of this
section. You must maintain the records identified as specified in Sec.
60.7(f) and in paragraphs (a) and (b) of this section. All records
required by this subpart must be maintained onsite for at least 5
years.
    (a) Records of the daily average pressure drop through the
absorber.
    (b) Records of deviations. A deviation is determined to have
occurred when the monitoring data or lack of monitoring data result in
any one of the criteria specified in paragraphs (b)(1) and (2) of this
section being met.
    (1) A deviation occurs when the daily average value of a monitored
operating parameter is less than the minimum pressure drop, or greater
than the maximum pressure drop established in Sec.  60.243(e)(3).
    (2) A deviation occurs when the monitoring data are not available
for at least 75 percent of the operating hours in a day.

PART 63--NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS
FOR SOURCE CATEGORIES

0
18. The authority citation for part 63 continues to read as follows:

    Authority:  42 U.S.C. 7401 et seq.

Subpart A--General Provisions

0
19. Section 63.14 is amended by revising paragraphs (b), (c)(1) through
(7), and (l)(2) to read as follows.

Sec.  63.14  Incorporations by reference.

* * * * *
    (b) The Association of Florida Phosphate Chemists, P.O. Box 1645,
Bartow, Florida 33830.
    (1) Book of Methods Used and Adopted By The Association of Florida
Phosphate Chemists, Seventh Edition 1991:
    (i) Section IX, Methods of Analysis for Phosphate Rock, No. 1
Preparation of Sample, IBR approved for Sec.  63.606(f)(3)(ii)(A),
Sec.  63.626(f)(3)(ii)(A).
    (ii) Section IX, Methods of Analysis for Phosphate Rock, No. 3
Phosphorus--P2O5 or
Ca3(PO4)2, Method A--Volumetric
Method, IBR approved for Sec.  63.606(f)(3)(ii)(B), Sec.
63.626(f)(3)(ii)(B).
    (iii) Section IX, Methods of Analysis for Phosphate Rock, No. 3
Phosphorus-P2O5 or
Ca3(PO4)2, Method B--Gravimetric
Quimociac Method, IBR approved for Sec.  63.606(f)(3)(ii)(C), Sec.
63.626(f)(3)(ii)(C).
    (iv) Section IX, Methods of Analysis For Phosphate Rock, No. 3
Phosphorus-P2O5 or
Ca3(PO4)2, Method C--
Spectrophotometric Method, IBR approved for Sec.  63.606(f)(3)(ii)(D),
Sec.  63.626(f)(3)(ii)(D).
    (v) Section XI, Methods of Analysis for Phosphoric Acid,
Superphosphate, Triple Superphosphate, and Ammonium Phosphates, No. 3
Total Phosphorus-P2O5, Method A--Volumetric
Method, IBR approved for Sec.  63.606(f)(3)(ii)(E), Sec.
63.626(f)(3)(ii)(E), and Sec.  63.626(g)(6)(i).
    (vi) Section XI, Methods of Analysis for Phosphoric Acid,
Superphosphate, Triple Superphosphate, and Ammonium Phosphates, No. 3
Total Phosphorus-P2O5, Method B--Gravimetric
Quimociac Method, IBR approved for Sec.  63.606(f)(3)(ii)(F), Sec.
63.626(f)(3)(ii)(F), and Sec.  63.626(g)(6)(ii).
    (vii) Section XI, Methods of Analysis for Phosphoric Acid,
Superphosphate, Triple Superphosphate, and Ammonium Phosphates, No. 3
Total Phosphorus-P2O5, Method C--
Spectrophotometric Method, IBR approved for Sec.  63.606(f)(3)(ii)(G),
Sec.  63.626(f)(3)(ii)(G), and Sec.  63.626(g)(6)(iii).
    (2) [Reserved]
    (c) * * *
    (1) AOAC Official Method 929.01 Sampling of Solid Fertilizers,
Sixteenth edition, 1995, IBR approved for Sec.  63.626(g)(7)(ii).
    (2) AOAC Official Method 929.02 Preparation of Fertilizer Sample,
Sixteenth edition, 1995, IBR approved for Sec.  63.626(g)(7)(iii).
    (3) AOAC Official Method 957.02 Phosphorus (Total) in Fertilizers,
Preparation of Sample Solution, Sixteenth edition, 1995, IBR approved
for Sec.  63.626(g)(7)(i).
    (4) AOAC Official Method 958.01 Phosphorus (Total) in Fertilizers,
Spectrophotometric Molybdovanadophosphate Method, Sixteenth edition,
1995, IBR approved for Sec.  63.626(g)(7)(vii).
    (5) AOAC Official Method 962.02 Phosphorus (Total) in Fertilizers,
Gravimetric Quinolinium Molybdophosphate Method, Sixteenth edition,
1995, IBR approved for Sec.  63.626(g)(7)(vi).

    (6) AOAC Official Method 969.02 Phosphorus (Total) in Fertilizers,
Alkalimetric Quinolinium Molybdophosphate Method, Sixteenth edition,
1995, IBR approved for Sec.  63.626(g)(7)(v).
    (7) AOAC Official Method 978.01 Phosphorus (Total) in Fertilizers,
Automated Method, Sixteenth edition, 1995, IBR approved for Sec.
63.626(g)(7)(iv).
* * * * *
    (l) * * *
    (2) Office Of Air Quality Planning And Standards (OAQPS), Fabric
Filter Bag Leak Detection Guidance, EPA-454/R-98-015, September 1997,
IBR approved for Sec. Sec.  63.548(e)(4), 63.606(m), 63.607(b)(2)(ii),
63.626(h), 63.627(b)(2)(iii), 63.7525(j)(2), and 63.11224(f)(2).
* * * * *
0
20. Part 63 is amended by revising subpart AA to read as follows:

Subpart AA--National Emission Standards for Hazardous Air
Pollutants From Phosphoric Acid Manufacturing Plants

Sec.
63.600 Applicability.
63.601 Definitions.
63.602 Standards and compliance dates.
63.603 [Reserved]
63.604 [Reserved]
63.605 Operating and monitoring requirements.
63.606 Performance tests and compliance provisions.
63.607 Notification, recordkeeping, and reporting requirements.
63.608 General requirements and applicability of part 63 general
provisions.
63.609 [Reserved]
63.610 Exemption from new source performance standards.
63.611 Implementation and enforcement.
Table 1 to Subpart AA of Part 63--Existing Source Phase 1 Emission
Limits
Table 1a to Subpart AA of Part 63--Existing Source Phase 2 Emission
Limits and Work Practice Standards
Table 2 to Subpart AA of Part 63--New Source Phase 1 Emission Limits
Table 2a to Subpart AA of Part 63--New Source Phase 2 Emission
Limits and Work Practices
Table 3 to Subpart AA of Part 63--Monitoring Equipment Operating
Parameters
Table 4 to Subpart AA of Part 63--Operating Parameters, Operating
Limits and Data Monitoring, Recordkeeping and Compliance Frequencies
Table 5 to Subpart AA of Part 63--Calibration and Quality Control
Requirements for Continuous Parameter Monitoring System (CPMS)
Appendix A to Subpart AA of Part 63--Applicability of General
Provisions (40 CFR Part 63, Subpart A) to Subpart AA

Sec.  63.600  Applicability.

    (a) Except as provided in paragraphs (c) and (d) of this section,
you are subject to the requirements of this subpart if you own or
operate a phosphoric acid manufacturing plant that is a major source as
defined in Sec.  63.2. You must comply with the emission limitations,
work practice standards, and operating parameter requirements specified
in this subpart at all times.
    (b) The requirements of this subpart apply to emissions of
hazardous air pollutants (HAP) emitted from the following affected
sources at a phosphoric acid manufacturing plant:
    (1) Each wet-process phosphoric acid process line.
    (2) Each evaporative cooling tower.
    (3) Each phosphate rock dryer.
    (4) Each phosphate rock calciner.
    (5) Each superphosphoric acid process line.
    (6) Each purified phosphoric acid process line.
    (7) Each gypsum dewatering stack pond associated with the
phosphoric acid manufacturing plant.
    (c) The requirements of this subpart do not apply to a phosphoric
acid manufacturing plant that is an area source as defined in Sec.
63.2.
    (d) The provisions of this subpart do not apply to research and
development facilities as defined in Sec.  63.601.

Sec.  63.601  Definitions.

    Terms used in this subpart are defined in Sec.  63.2 of the Clean
Air Act and in this section as follows:
    Active gypsum dewatering stack means a gypsum dewatering stack that
does not meet the definition of closed gypsum dewatering stack.
    Breakthrough means the point in time when the level of mercury
detected at the outlet of an adsorber system is 90 percent of the
highest concentration allowed to be discharged consistent with the
applicable emission limit.
    Closed gypsum dewatering stack means a gypsum dewatering stack that
is no longer receiving phosphogypsum, and has received a cover on the
top and sides. The final cover of a closed gypsum dewatering stack must
include a barrier soil layer that will sustain vegetation and a drought
resistant vegetative cover.
    Cooling pond means a natural or artificial open reservoir that is
primarily used to collect and cool water that comes into direct contact
with raw materials, intermediate products, by-products, waste products,
or finished products from a phosphoric acid manufacturing plant. The
water in the cooling pond is often used at phosphoric acid
manufacturing plants as filter wash water, absorber water for air
pollution control absorbers, and/or to transport phosphogypsum as
slurry to a gypsum dewatering stack(s).
    Equivalent P 2O5 feed means the quantity of phosphorus, expressed
as phosphorus pentoxide (P2O5), fed to the
process.
    Evaporative cooling tower means an open-water, re-circulating
device that uses fans or natural draft to draw or force ambient air
through the device to remove heat from process water by direct contact.
    Exceedance means a departure from an indicator range established
for monitoring under this subpart, consistent with any averaging period
specified for averaging the results of the monitoring.
    Existing source depends on the date that construction or
reconstruction of an affected source commenced. A wet-process
phosphoric acid process line, superphosphoric acid process line, rock
dryer, rock calciner, evaporative cooling tower, or purified acid
process line is an existing source if construction or reconstruction of
the affected source commenced on or before December 27, 1996. A gypsum
dewatering stack or cooling pond is an existing source if construction
or reconstruction of the gypsum dewatering stack or cooling pond
commenced on or before [date of publication of the final rule in the
Federal Register].
    Gypsum dewatering stack means the phosphogypsum stack (or pile, or
landfill), together with all pumps, piping, ditches, drainage
conveyances, water control structures, collection pools, cooling ponds,
surge ponds, auxiliary holding ponds, and any other collection or
conveyance system associated with the transport of phosphogypsum from
the plant to the gypsum dewatering stack, its management at the stack,
and the process wastewater return to the phosphhoric acid production or
other process. This definition includes toe drain systems, ditches and
other leachate collection systems, but does not include conveyances
within the confines of the fertilizer plant or emergency diversion
impoundments used in emergency circumstances caused by rainfall events
of high volume or duration for the temporary storage of process
wastewater to avoid discharges to surface waters.
    HAP metals mean those metals and their compounds (in particulate or
volatile form) that are included on the list of hazardous air
pollutants in section 112 of the Clean Air Act. HAP metals include, but
are not limited to:

antimony, arsenic, beryllium, cadmium, chromium, Pb, manganese, nickel,
and selenium expressed as particulate matter as measured by the methods
and procedures in this subpart or an approved alternative method. For
the purposes of this subpart, HAP metals (except mercury) are expressed
as particulate matter as measured by Method 5 at 40 CFR part 60,
appendix A-3.
    New source depends on the date that construction or reconstruction
of an affected source commences. A wet-process phosphoric acid process
line, superphosphoric acid process line, rock dryer, rock calciner,
evaporative cooling tower, or purified acid process line is a new
source if construction or reconstruction of the affected source
commenced after December 27, 1996. A gypsum dewatering stack or cooling
pond is a new source if construction or reconstruction of the gypsum
dewatering stack or cooling pond commenced after [date of publication
of the final rule in the Federal Register]
    Phosphate rock calciner means the equipment used to remove moisture
and organic matter from phosphate rock through direct or indirect
heating.
    Phosphate rock dryer means the equipment used to reduce the
moisture content of phosphate rock through direct or indirect heating.
    Phosphate rock feed means all material entering any phosphate rock
dryer or phosphate rock calciner including moisture and extraneous
material as well as the following ore materials: fluorapatite,
hydroxylapatite, chlorapatite, and carbonateapatite.
    Phosphoric acid defluorination process means any process that
treats phosphoric acid in a manner that removes fluorine compounds.
    Phosphoric acid oxidation reactor means any equipment that uses an
oxidizing agent to treat phosphoric acid.
    Process line means all equipment associated with the production of
any grade or purity of a phosphoric acid product including emission
control equipment.
    Purified phosphoric acid process line means any process line that
uses a HAP as a solvent in the separation of impurities from the
product acid for the purposes of rendering that product suitable for
industrial, manufacturing, or food grade uses. A purified phosphoric
acid process line includes, but is not limited to: solvent extraction
process equipment, solvent stripping and recovery equipment, seal
tanks, carbon treatment equipment, cooling towers, storage tanks,
pumps, and process piping.
    Raffinate stream means the aqueous stream containing the impurities
that are removed during the purification of wet-process phosphoric acid
using solvent extraction.
    Research and development facility means research or laboratory
operations whose primary purpose is to conduct research and development
into new processes and products, where the operations are under the
close supervision of technically trained personnel, and where the
facility is not engaged in the manufacture of products for commercial
sale in commerce or other off-site distribution, except in a de minimis
manner.
    Superphosphoric acid process line means any process line that
concentrates wet-process phosphoric acid to 66 percent or greater
P2O5 content by weight. A superphosphoric acid
process line includes, but is not limited to: evaporators, hot wells,
acid sumps, oxidation reactors, and cooling tanks.
    Total fluorides means elemental fluorine and all F compounds,
including the HAP HF, as measured by reference methods specified in 40
CFR part 60, appendix A, Method 13 A or B, or by equivalent or
alternative methods approved by the Administrator pursuant to Sec.
63.7(f).
    Wet-process phosphoric acid process line means any process line
manufacturing phosphoric acid by reacting phosphate rock and acid. A
wet-process phosphoric acid process line includes, but is not limited
to: Reactors, filters, evaporators, hot wells, clarifiers, and
defluorination systems.

Sec.  63.602  Standards and compliance dates.

    (a) On and after the date on which the initial performance test
specified in Sec. Sec.  63.7 and 63.606 is required to be completed,
for each wet-process phosphoric acid process line, superphosphoric acid
process line, rock dryer, and rock calciner, you must comply with the
emission limits and work practice standards as specified in paragraphs
(a)(1) through (6) of this section. If a process line contains more
than one emission point, you must sum the emissions from all emission
points in a process line to determine compliance with the specified
emission limits.
    (1) For each existing wet-process phosphoric acid process line,
superphosphoric acid process line, and rock dryer that commenced
construction or reconstruction on or before December 27, 1996, you must
comply with the emission limits specified in Table 1 to this subpart
beginning on June 10, 2002 and ending on [date one year after the date
of publication of the final rule in the Federal Register]. Beginning on
[date one year after the date of publication of the final rule in the
Federal Register], the emission limits specified in Table 1 to this
subpart no longer apply, and you must comply with the emission limits
specified in Table 1a to this subpart.
    (2) For each existing rock calciner that commenced construction or
reconstruction on or before December 27, 1996, you must comply with the
emission limits as specified in paragraphs (a)(2)(i) and (ii) of this
section, and the work practice standards as specified in paragraph
(a)(2)(iii) of this section.
    (i) You must comply with the total particulate emission limit
specified in Tables 1 and 1a to this subpart beginning on June 10,
2002.
    (ii) You must comply with the mercury emission limit specified in
Table 1a to this subpart beginning on [date three years after the date
of publication of the final rule in the Federal Register].
    (iii) You must comply with the hydrogen fluoride work practice
standards specified in Table 1a to this subpart beginning on [date of
publication of the final rule in the Federal Register].
    (3) For each new wet-process phosphoric acid process line,
superphosphoric acid process line, and rock dryer that commences
construction or reconstruction after December 27, 1996 and on or before
[date of publication of the final rule in the Federal Register], you
must comply with the emission limits specified in Table 2 to this
subpart beginning at startup or on June 10, 1999, whichever is later,
and ending on [date one year after the date of publication of the final
rule in the Federal Register]. Beginning on [date one year after the
date of publication of the final rule in the Federal Register], the
emission limits specified in Table 2 to this subpart no longer apply,
and you must comply with the emission limits specified in Table 2a to
this subpart beginning on [date one year after the date of publication
of the final rule in the Federal Register] or immediately upon startup,
whichever is later.
    (4) For each new wet-process phosphoric acid process line,
superphosphoric acid process line, and rock dryer that commences
construction or reconstruction after [date of publication of the final
rule in the Federal Register], you must comply with the emission limits
specified in Table 2a to this subpart immediately upon startup.

    (5) For each new rock calciner that commences construction or
reconstruction after December 27, 1996 and on or before [date of
publication of the final rule in the Federal Register], you must comply
with the emission limits as specified in paragraphs (a)(5)(i) and (ii)
of this section, and the work practice standards as specified in
paragraph (a)(5)(iii) of this section.
    (i) You must comply with the total particulate emission limit
specified in Tables 2 and 2a to this subpart beginning on June 10, 1999
or at startup, whichever is later.
    (ii) You must comply with the mercury emission limit specified in
Table 2a to this subpart beginning on [date one year after the date of
publication of the final rule in the Federal Register].
    (iii) You must comply with the hydrogen fluoride work practice
standards specified in Table 2a to this subpart beginning on [date of
publication of the final rule in the Federal Register].
    (6) For each new rock calciner that commences construction or
reconstruction after [date of publication of the final rule in the
Federal Register], you must comply with the emission limits and work
practices standards specified in Table 2a to this subpart immediately
upon startup.
    (b) For each existing and new purified phosphoric acid process
line, you must comply with the provisions of subpart H of this part and
maintain:
    (1) A 30-day rolling average of daily concentration measurements of
methyl isobutyl ketone equal to or below 20 parts per million by weight
(ppmw) for each product acid stream.
    (2) A 30-day rolling average of daily concentration measurements of
methyl isobutyl ketone equal to or below 30 ppmw for each raffinate
stream.
    (3) The daily average temperature of the exit gas stream from the
chiller stack below 50 degrees Fahrenheit.
    (c) You must not introduce into any existing or new evaporative
cooling tower any liquid effluent from any wet scrubbing device
installed to control emissions from process equipment.
    (d) For each existing gypsum dewatering stack or cooling pond that
commenced construction or reconstruction on or before [date of
publication of the final rule in the Federal Register], you must
prepare, and operate in accordance with, a gypsum dewatering stack and
cooling pond management plan that contains the information specified in
paragraph (f) of this section beginning on [date one year after the
date of publication of the final rule in the Federal Register].
    (e) For each new gypsum dewatering stack or cooling pond that
commences construction or reconstruction after [date of publication of
the final rule in the Federal Register], you must prepare, and operate
in accordance with, a gypsum dewatering stack and cooling pond
management plan that contains the information specified in paragraph
(f) of this section beginning on [date of publication of the final rule
in the Federal Register].
    (f) The gypsum dewatering stack and cooling pond management plan
must include the information specified in paragraphs (f)(1) through (3)
of this section.
    (1) Location and size (i.e., current total footprint acreage) of
each closed gypsum dewatering stack, active gypsum dewatering stack,
and cooling pond.
    (2) Control techniques that are used to minimize hydrogen fluoride
and fugitive dust emissions from exposed surface areas of each active
gypsum dewatering stack and cooling pond. For each active gypsum
dewatering stack and cooling pond that commenced construction or
reconstruction on or before [date of publication of the final rule in
the Federal Register], you must use, and include in the management
plan, at least one of the control techniques listed in paragraphs
(f)(2)(i) through (vi) of this section. For each active gypsum
dewatering stack and cooling pond that commences construction or
reconstruction after [date of publication of the final rule in the
Federal Register], you must use, and include in the management plan, at
least two of the control techniques listed in paragraphs (f)(2)(i)
through (vi) of this section.
    (i) Submerge the discharge pipe along with any necessary siphon
breaks to a level below the surface of the cooling pond or the surface
of the pond associated with the active gypsum dewatering stack.
    (ii) Minimize the surface area of the active gypsum dewatering
stack by using a rim ditch (cell) building technique or other building
technique.
    (iii) Wet the active gypsum dewatering stack during hot or dry
periods.
    (iv) Apply slaked lime to the active gypsum dewatering stack
surfaces.
    (v) Apply soil caps and vegetation to all side slopes of the active
gypsum dewatering stack up to 50 feet below the stack top.
    (vi) Close the active gypsum dewatering stack such that it meets
the definition of a closed gypsum dewatering stack specified in Sec.
63.601.
    (3) You must conduct calculations and maintain a record of the
calculations to demonstrate compliance with the ratio requirement
specified in paragraph (g) of this section.
    (g) After [date of publication of the final rule in the Federal
Register], whenever a facility commences construction of a new gypsum
dewatering stack, the ratio of total active gypsum dewatering stack
area (i.e., sum of the footprint acreage of all active gypsum
dewatering stacks combined) to annual phosphoric acid manufacturing
capacity must not be greater than 80 acres per 100,000 tons of annual
phosphoric acid manufacturing capacity (equivalent
P2O5 feed).
    (h) To demonstrate compliance with any emission limits specified in
paragraph (a) of this section during periods of startup and shutdown,
you must begin operation of any control device(s) being used at the
affected source prior to introducing any feed into the affected source.
You must continue operation of the control device(s) through the
shutdown period until all feed material has been processed through the
affected source.

Sec.  63.603  [Reserved]

Sec.  63.604  [Reserved]

Sec.  63.605  Operating and monitoring requirements.

    (a) For each wet-process phosphoric acid process line or
superphosphoric acid process line subject to the provisions of this
subpart, you must comply with the monitoring requirements specified in
paragraphs (a)(1) and (2) of this section.
    (1) Install, calibrate, maintain, and operate a continuous
monitoring system (CMS) according to your site-specific monitoring plan
specified in Sec.  63.608(c). The CMS must have an accuracy of 5 percent over its operating range and must determine and
permanently record the mass flow of phosphorus-bearing material fed to
the process.
    (2) Maintain a daily record of equivalent
P2O5 feed. Calculate the equivalent
P2O5 feed by determining the total mass rate, in
metric ton/hour of phosphorus bearing feed, using the monitoring system
specified in paragraph (a)(1) of this section and the procedures
specified in Sec.  63.606(f)(3).
    (b) For each phosphate rock dryer or phosphate rock calciner
subject to the provisions of this subpart, you must comply with the
monitoring requirements specified in paragraphs (b)(1) through (3) of
this section.
    (1) Install, calibrate, maintain, and operate a CMS according to
your site-specific monitoring plan specified in

Sec.  63.608(c). The CMS must have an accuracy of 5 percent
over its operating range and must determine and permanently record
either:
    (i) The mass flow of phosphorus-bearing feed material to the
phosphate rock dryer or calciner, or
    (ii) The mass flow of product from the phosphate rock dryer or
calciner.
    (2) Maintain the records specified in paragraphs (b)(2)(i) and (ii)
of this section.
    (i) If you monitor the mass flow of phosphorus-bearing feed
material to the phosphate rock dryer or calciner as specified in
paragraph (b)(1)(i) of this section, maintain a daily record of
phosphate rock feed by determining the total mass rate in metric tons/
hour of phosphorus-bearing feed.
    (ii) If you monitor the mass flow of product from the phosphate
rock dryer or calciner as specified in paragraph (b)(1)(ii) of this
section, maintain a daily record of product by determining the total
mass rate in metric ton/hour of product.
    (3) For each phosphate rock calciner, you must comply with the
requirements in paragraphs (b)(3)(i) and (ii) of this section.
    (i) The CMS must continuously measure and permanently record the
calcination temperature of the phosphate rock calciner every 15
minutes.
    (ii) You must comply with the applicable calibration and quality
control requirements for temperature specified in Table 5 to this
subpart.
    (c) For each purified phosphoric acid process line, you must comply
with the monitoring requirements specified in paragraphs (c)(1) and (2)
of this section.
    (1) Install, calibrate, maintain, and operate a CMS according to
your site-specific monitoring plan specified in Sec.  63.608(c). The
CMS must continuously measure and permanently record the stack gas exit
temperature for each chiller stack.
    (2) Measure and record the concentration of methyl isobutyl ketone
in each product acid stream and each raffinate stream once each day.
    (d) If you use a control device(s) to comply with the emission
limits specified in Table 1 or 2 of this subpart, or to comply with the
emission limits or work practice standards specified in Table 1a or 2a
of this subpart, you must install a continuous parameter monitoring
system (CPMS) and comply with the requirements specified in paragraphs
(d)(1) through (5) of this section.
    (1) You must monitor the operating parameter(s) applicable to the
control device that you use as specified in Table 3 to this subpart and
establish the applicable limit or range for the operating parameter
limit as specified in paragraphs (d)(1)(i) through (iii) of this
section, as applicable.
    (i) Except as specified in paragraphs (d)(1)(ii) and (iii) of this
section, determine the value(s) as the arithmetic average of operating
parameter measurements recorded during with the three test runs
conducted for the most recent performance test.
    (ii) For any absorber required by the work practice standards for
phosphate rock calciners in Table 1a or 2a of this subpart, you must
determine the value(s) based on an engineering assessment. The
engineering assessment may include, but is not limited to,
manufacturer's specifications and recommendations and/or a design
analysis based on accepted chemical engineering principles, measurable
process parameters, or physical or chemical laws or properties.
Examples of analytical methods include, but are not limited to, the use
of material balances based on process stoichiometry and estimation of
maximum flow rate based on physical equipment design such as pump or
blower capacities.
    (iii) If you use an absorber or a wet electrostatic precipitator to
comply with the emission limits in Table 1, 1a, 2, or 2a to this
subpart and you monitor pressure drop across each absorber or secondary
voltage for a wet electrostatic precipitator, you must establish
allowable ranges using the methodology specified in paragraphs
(d)(1)(iii)(A) and (B) of this section.
    (A) The allowable range for the daily averages of the pressure drop
across an absorber, or secondary voltage for a wet electrostatic
precipitator, is 20 percent of the baseline average value
determined in paragraph (d)(1)(i) of this section. The Administrator
retains the right to reduce the 20 percent adjustment to
the baseline average values of operating ranges in those instances
where performance test results indicate that a source's level of
emissions is near the value of an applicable emissions standard.
However, the adjustment must not be reduced to less than 10
percent under any instance.
    (B) As an alternative to paragraph (d)(1)(iii)(A) of this section,
you may establish, and provide to the Administrator for approval,
allowable ranges for the daily averages of the pressure drop across an
absorber, or secondary voltage for an electrostatic precipitator, for
the purpose of assuring compliance with this subpart. You must
establish the allowable ranges based on the baseline average values
recorded during previous performance tests, or the results of
performance tests conducted specifically for the purposes of this
paragraph. You must conduct all performance tests using the methods
specified in Sec.  63.606. You must certify that the control devices
and processes have not been modified since the date of the performance
test from which you obtained the data used to establish the allowable
ranges. You must request and obtain approval of the Administrator for
changes to the allowable ranges. When a source using the methodology of
this paragraph is retested, you must determine new allowable ranges of
baseline average values unless the retest indicates no change in the
operating parameters outside the previously established ranges.
    (2) You must monitor, record, and demonstrate continuous compliance
using the minimum frequencies specified in Table 4 to this subpart.
    (3) You must comply with the calibration and quality control
requirements that are applicable to the operating parameter(s) you
monitor as specified in Table 5 to this subpart.
    (4) If you use a non-regenerative adsorption system to achieve the
mercury emission limits specified in Table 1a or 2a to this subpart,
you must comply with the requirements specified in paragraph (e) of
this section.
    (5) If you use a sorbent injection system to achieve the mercury
emission limits specified in Table 1a or 2a to this subpart and you use
a fabric filter to collect the associated particulate matter, the
system must meet the requirements for fabric filters specified in
paragraph (f) of this section.
    (e) If you use a non-regenerative adsorption system to achieve the
mercury emission limits specified in Table 1a or 2a to this subpart,
you must comply with the requirements specified in paragraphs (e)(1)
through (3) of this section.
    (1) Determine the adsorber bed life (i.e., the expected life of the
sorbent in the adsorption system) using the procedures specified in
paragraphs (e)(1)(i) through (iv) of this section.
    (i) If the adsorber bed is expected (designed) to have a life of
less than 2 years, determine the outlet concentration of mercury on a
quarterly basis until breakthrough occurs for the first three adsorber
bed change-outs. The adsorber bed life shall equal the average length
of time between each of the three change-outs.
    (ii) If the adsorber bed is expected (designed) to have a life of 2
years or greater, determine the outlet concentration of mercury on a
semi-annual basis until breakthrough occurs

for the first two adsorber bed change-outs. The adsorber bed life must
equal the average length of time between each of the two change-outs.
    (iii) If more than one adsorber is operated in parallel, or there
are several identical operating lines controlled by adsorbers, you may
determine the adsorber bed life by measuring the outlet concentration
of mercury from one of the adsorbers or adsorber systems rather than
determining the bed life for each adsorber.
    (iv) The adsorber or adsorber system you select for the adsorber
bed life test must have the highest expected inlet gas mercury
concentration and the highest operating rate of any adsorber in
operation at the affected source. During the test to determine adsorber
bed life, you must use the fuel that contains the highest level of
mercury in any fuel-burning unit associated with the adsorption system
being tested.
    (2) You must replace the sorbent in each adsorber on or before the
end of the adsorbent bed life, calculated in paragraph (e)(1) of this
section.
    (3) You must re-establish the adsorber bed life if the sorbent is
replaced with a different brand or type, or if any process changes are
made that would lead to a shorter bed lifetime.
    (f) If you use a fabric filter system to comply with the emission
limits specified in Table 1, 1a, 2, or 2a to this subpart, the fabric
filter must be equipped with a bag leak detection system that is
installed, calibrated, maintained, and continuously operated according
to the requirements in paragraphs (f)(1) through (10) of this section.
    (1) Install a bag leak detection sensor(s) in a position(s) that
will be representative of the relative or absolute particulate matter
loadings for each exhaust stack, roof vent, or compartment (e.g., for a
positive-pressure fabric filter) of the fabric filter.
    (2) Use a bag leak detection system certified by the manufacturer
to be capable of detecting particulate matter emissions at
concentrations of 1 milligram per actual cubic meter (0.00044 grains
per actual cubic feet) or less.
    (3) Use a bag leak detection system equipped with a device to
continuously record the output signal from the system sensor.
    (4) Use a bag leak detection system equipped with a system that
will trigger an alarm when an increase in relative particulate matter
emissions over a preset level is detected. The alarm must be located
such that the alert is observed readily by plant operating personnel.
    (5) Install a bag leak detection system in each compartment or cell
for positive-pressure fabric filter systems that do not duct all
compartments or cells to a common stack. Install a bag leak detector
downstream of the fabric filter if a negative-pressure or induced-air
filter system is used. If multiple bag leak detectors are required, the
system's instrumentation and alarm may be shared among detectors.
    (6) Calibration of the bag leak detection system must, at a
minimum, consist of establishing the baseline output level by adjusting
the range and the averaging period of the device and establishing the
alarm set points and the alarm delay time.
    (7) After initial adjustment, you must not adjust the sensitivity
or range, averaging period, alarm set points, or alarm delay time
except as established in your site-specific monitoring plan required in
Sec.  63.608(c). In no event may the sensitivity be increased more than
100 percent or decreased by more than 50 percent over a 365-day period
unless such adjustment follows a complete inspection of the fabric
filter system that demonstrates that the system is in good operating
condition.
    (8) Operate and maintain each fabric filter and bag leak detection
system such that the alarm does not sound more than 5 percent of the
operating time during a 6-month period. If the alarm sounds more than 5
percent of the operating time during a 6-month period, it is considered
an operating parameter exceedance. Calculate the alarm time (i.e., time
that the alarm sounds) as specified in paragraphs (f)(8)(i) through
(iii) of this section.
    (i) If inspection of the fabric filter demonstrates that corrective
action is not required, the alarm duration is not counted in the alarm
time calculation.
    (ii) If corrective action is required, each alarm time is counted
as a minimum of 1 hour.
    (iii) If it takes longer than 1 hour to initiate corrective action,
each alarm time is counted as the actual amount of time taken to
initiate corrective action.
    (9) If the alarm on a bag leak detection system is triggered, you
must initiate procedures within 1 hour of an alarm to identify the
cause of the alarm and then initiate corrective action, as specified in
Sec.  63.608(d)(2), no later than 48 hours after an alarm. Failure to
take these actions within the prescribed time periods is considered a
violation.
    (10) Retain records of any bag leak detection system alarm,
including the date, time, duration, and the percent of the total
operating time during each 6-month period that the alarm sounds, with a
brief explanation of the cause of the alarm, the corrective action
taken, and the schedule and duration of the corrective action.
    (g) If you choose to directly monitor mercury emissions instead of
using CPMS as specified in paragraph (d) of this section, then you must
install and operate a mercury CEMS in accordance with Performance
Specification 12A of appendix B to part 60 of this chapter, or a
sorbent trap-based integrated monitoring system in accordance with
Performance Specification 12B of appendix B to part 60 of this chapter.
You must continuously monitor mercury emissions as specified in
paragraphs (g)(1) through (4) of this section.
    (1) The span value for any mercury CEMS must include the intended
upper limit of the mercury concentration measurement range during
normal operation, which may be exceeded during other short-term
conditions lasting less than 24 consecutive operating hours. However,
the span should be at least equivalent to approximately two times the
emissions standard. You may round the span value to the nearest
multiple of 10 micrograms per cubic meter of total mercury.
    (2) You must operate and maintain each mercury CEMS or sorbent
trap-based integrated monitoring system according to the quality
assurance requirements specified in Procedure 5 of appendix F to part
60 of this chapter.
    (3) You must conduct relative accuracy testing of mercury
monitoring systems, as specified in Performance Specification 12A,
Performance Specification 12B, or Procedure 5 of appendix B to part 60
of this chapter, at normal operating conditions.
    (4) If you use a mercury CEMS, you must install, operate,
calibrate, and maintain an instrument for continuously measuring and
recording the exhaust gas flow rate to the atmosphere according to your
site-specific monitoring plan specified in Sec.  63.608(c).

Sec.  63.606  Performance tests and compliance provisions.

    (a) You must conduct an initial performance test to demonstrate
compliance with the applicable emission limits specified in Tables 1,
1a, 2, and 2a to this subpart, on or before the applicable compliance
date specified in Sec.  63.602.
    (b) After you conduct the initial performance test specified in
paragraph (a) of this section, you must conduct an annual performance
test no more than 13 months after the date the previous performance
test was conducted.

    (c) For affected sources (as defined in Sec.  63.600) that have not
operated since the previous annual performance test was conducted and
more than 1 year has passed since the previous performance test, you
must conduct a performance test no later than 180 days after the re-
start of the affected source according to the applicable provisions in
Sec.  63.7(a)(2).
    (d) You must conduct the performance tests specified in this
section at maximum representative operating conditions for the process.
Maximum representative operating conditions means process operating
conditions that are likely to recur and that result in the flue gas
characteristics that are the most difficult for reducing emissions of
the regulated pollutant(s) by the control device used. The most
difficult condition for the control device may include, but is not
limited to, the highest HAP mass loading rate to the control device or
the highest HAP mass loading rate of constituents that approach the
limits of solubility for scrubbing media. Operations during startup,
shutdown, and malfunction do not constitute representative operating
conditions for purposes of conducting a performance test. You must
record the process information that is necessary to document the
operating conditions during the test and include in such record an
explanation to support that such conditions represent maximum
representative operating conditions. Upon request, you must make
available to the Administrator such records as may be necessary to
determine the conditions of performance tests.
    (e) In conducting all performance tests, you must use as reference
methods and procedures the test methods in 40 CFR part 60, appendix A,
or other methods and procedures as specified in this section, except as
provided in Sec.  63.7(f).
    (f) You must determine compliance with the applicable total
fluorides standards or hydrogen fluoride standards specified in Tables
1, 1a, 2, and 2a to this subpart as specified in paragraphs (f)(1)
through (3) of this section.
    (1) Compute the emission rate (E) of total fluorides or hydrogen
fluoride for each run using Equation AA-1:
[GRAPHIC] [TIFF OMITTED] TP07NO14.000

Where:

E = Emission rate of total fluorides or hydrogen fluoride, gram/
metric ton (pound/ton) of equivalent P2O5
feed.
Ci = Concentration of total fluorides or hydrogen
fluoride from emission point ``i,'' milligram/dry standard cubic
meter (milligram/dry standard cubic feet).
Qi = Volumetric flow rate of effluent gas from emission
point ``i,'' dry standard cubic meter/hour (dry standard cubic feet/
hour).
N = Number of emission points associated with the affected facility.
P = Equivalent P2O5 feed rate, metric ton/hour
(ton/hour).
K = Conversion factor, 1000 milligram/gram (453,600 milligram/
pound).

    (2) You must use the test methods and procedures as specified in
paragraphs (f)(2)(i) or (ii) of this section.
    (i) You must use Method 13A or 13B (40 CFR part 60, appendix A) to
determine the total fluorides concentration (Ci) and the
volumetric flow rate (Qi) of the effluent gas at each
emission point. The sampling time for each run at each emission point
must be at least 60 minutes. The sampling volume for each run at each
emission point must be at least 0.85 dscm (30 dscf). If Method 13B is
used, the fusion of the filtered material described in Section <IP_ADDRESS>
and the distillation of suitable aliquots of containers 1 and 2,
described in section 7.3.3 and 7.3.4 in Method 13 A, may be omitted.
    (ii) You must use Method 320 at 40 CFR part 63, appendix A to
determine the hydrogen fluoride concentration (Ci) at each
emission point. The sampling time for each run at each emission point
must be at least 60 minutes. You must use Method 2 at 40 CFR part 60,
Appendix A-1 to determine the volumetric flow rate (Qi) of
the effluent gas from each of the emission points.
    (3) Compute the equivalent P2O5 feed rate (P)
using Equation AA-2:
[GRAPHIC] [TIFF OMITTED] TP07NO14.001

Where:

P = P2O5 feed rate, metric ton/hr (ton/hour).
Mp = Total mass flow rate of phosphorus-bearing feed,
metric ton/hour (ton/hour).
Rp = P2O5 content, decimal
fraction.

    (i) Determine the mass flow rate (Mp) of the phosphorus-
bearing feed using the measurement system described in Sec.  63.605(a).
    (ii) Determine the P2O5 content
(Rp) of the feed using, as appropriate, the following
methods specified in Methods Used and Adopted By The Association of
Florida Phosphate Chemists (Seventh Edition, 1991) where applicable:
    (A) Section IX, Methods of Analysis for Phosphate Rock, No. 1
Preparation of Sample (incorporated by reference, see Sec.  63.14).
    (B) Section IX, Methods of Analysis for Phosphate Rock, No. 3
Phosphorus-P2O5 or
Ca3(PO4)2, Method A-Volumetric Method
(incorporated by reference, see Sec.  63.14).
    (C) Section IX, Methods of Analysis for Phosphate Rock, No. 3
Phosphorus-P2O5 or
Ca3(PO4)2, Method B-Gravimetric
Quimociac Method (incorporated by reference, see Sec.  63.14).
    (D) Section IX, Methods of Analysis for Phosphate Rock, No. 3
Phosphorus-P2O5 or
Ca3(PO4)2, Method C-Spectrophotometric
Method (incorporated by reference, see Sec.  63.14).
    (E) Section XI, Methods of Analysis for Phosphoric Acid,
Superphosphate, Triple Superphosphate, and Ammonium Phosphates, No. 3
Total Phosphorus-P2O5, Method A-Volumetric Method
(incorporated by reference, see Sec.  63.14).
    (F) Section XI, Methods of Analysis for Phosphoric Acid,
Superphosphate, Triple Superphosphate, and Ammonium Phosphates, No. 3
Total Phosphorus-P2O5, Method B-Gravimetric
Quimociac Method (incorporated by reference, see Sec.  63.14).
    (G) Section XI, Methods of Analysis for Phosphoric Acid,
Superphosphate, Triple Superphosphate, and Ammonium Phosphates, No. 3
Total Phosphorus-P2O5, Method C-
Spectrophotometric Method (incorporated by reference, see Sec.  63.14).
    (g) You must demonstrate compliance with the applicable particulate
matter standards specified in Tables 1, 1a, 2, and 2a to this subpart
as specified in paragraphs (g)(1) through (3) of this section.
    (1) Compute the emission rate (E) of particulate matter for each
run using Equation AA-3:
[GRAPHIC] [TIFF OMITTED] TP07NO14.002

Where:
E = Emission rate of particulate matter, kilogram/megagram (pound/
ton) of phosphate rock feed.
C = Concentration of particulate matter, gram/dry standard cubic
meter (gram/dry standard cubic feet).

Q = Volumetric flow rate of effluent gas, dry standard cubic meter/
hour (dry standard cubic feet/hour).
P = Phosphate rock feed rate, megagram/hour (ton/hour).
K = Conversion factor, 1000 grams/kilogram (453.6 grams/pound).

    (2) Use Method 5 at 40 CFR part 60, appendix A-3 to determine the
particulate matter concentration (C) and volumetric flow rate (Q) of
the effluent gas. Except as specified in paragraph (h) of this section,
the sampling time and sample volume for each run must be at least 60
minutes and 0.85 dry standard cubic meter (30 dry standard cubic feet).
    (3) Use the CMS described in Sec.  63.605(b) to determine the
phosphate rock feed rate (P) for each run.
    (h) To demonstrate compliance with the particulate matter standards
for phosphate rock calciners specified in Tables 1, 1a, 2, or 2a to
this subpart, you must use Method 5 at 40 CFR part 60, appendix A-3 to
determine the particulate matter concentration. The sampling volume for
each test run must be at least 1.70 dry standard cubic meter.
    (i) To demonstrate compliance with the mercury emission standards
for phosphate rock calciners specified in Table 1a or 2a to this
subpart, you must use Method 30B at 40 CFR part 60, appendix A-8 to
determine the mercury concentration, unless you use a CEMS to
demonstrate compliance. If you use a non-regenerative adsorber to
control mercury emissions, you must use this test method to determine
the expected bed life as specified in Sec.  63.605(e)(1).
    (j) If you choose to monitor the mass flow of product from the
phosphate rock dryer or calciner as specified in Sec.
63.605(b)(1)(ii), you must either:
    (1) Simultaneously monitor the feed rate and output rate of the
phosphate rock dryer or calciner during the performance test, or
    (2) Monitor the output rate and the input and output moisture
contents of the phosphate rock dryer or calciner during the performance
test and calculate the corresponding phosphate rock dryer or calciner
input rate.
    (k) For sorbent injection systems, you must conduct the performance
test at the outlet of the fabric filter used for sorbent collection.
You must monitor and record operating parameter values for the fabric
filter during the performance test. If the sorbent is replaced with a
different brand or type of sorbent than was used during the performance
test, you must conduct a new performance test.
    (l) If you use a mercury CEMS as specified in Sec.  63.605(g), or
paragraph (i) of this section, you must demonstrate initial compliance
based on the first 30 operating days during which you operate the
affected source using a CEMS. You must obtain hourly mercury
concentration and stack gas volumetric flow rate data.
    (m) If you use a CMS, you must conduct a performance evaluation, as
specified in Sec.  63.8(e), in accordance with your site-specific
monitoring plan in Sec.  63.608(c). For fabric filters, you must
conduct a performance evaluation of the bag leak detection system
consistent with the guidance provided in Office Of Air Quality Planning
And Standards (OAQPS), Fabric Filter Bag Leak Detection Guidance, EPA-
454/R-98-015, September 1997 (incorporated by reference, see Sec.
63.14). You must record the sensitivity of the bag leak detection
system to detecting changes in particulate matter emissions, range,
averaging period, and alarm set points during the performance test.

Sec.  63.607  Notification, recordkeeping, and reporting requirements.

    (a) You must comply with the notification requirements specified in
Sec.  63.9. You must also notify the Administrator each time that the
operating limits change based on data collected during the most recent
performance test. When a source is retested and the performance test
results are submitted to the Administrator pursuant to paragraph (b)(1)
of this section, Sec.  63.7(g)(1), or Sec.  63.10(d)(2), you must
indicate whether the operating range is based on the new performance
test or the previously established range. Upon establishment of a new
operating range, you must thereafter operate under the new range. If
the Administrator determines that you did not conduct the compliance
test in accordance with the applicable requirements or that the ranges
established during the performance test do not represent normal
operations, you must conduct a new performance test and establish new
operating ranges.
    (b) You must comply with the reporting and recordkeeping
requirements in Sec.  63.10 as specified in paragraphs (b)(1) through
(b)(5) of this section.
    (1) You must comply with the general recordkeeping requirements in
Sec.  63.10(b)(1).
    (2) As required by Sec.  63.10(d), you must report the results of
the initial and subsequent performance tests as part of the
notification of compliance status required in Sec.  63.9(h). You must
verify in the performance test reports that the operating limits for
each process have not changed or provide documentation of revised
operating limits established according to Sec.  63.605, as applicable.
In the notification of compliance status, you must also:
    (i) Certify to the Administrator annually that you have complied
with the evaporative cooling tower requirements specified in Sec.
63.602(c).
    (ii) Submit analyses and supporting documentation demonstrating
conformance with the Office Of Air Quality Planning And Standards
(OAQPS), Fabric Filter Bag Leak Detection Guidance, EPA-454/R-98-015,
September 1997 (incorporated by reference, see Sec.  63.14) and
specifications for bag leak detection systems as part of the
notification of compliance status report.
    (iii) Submit the gypsum dewatering stack and cooling pond
management plan specified in Sec.  63.602(f).
    (iv) If you elect to demonstrate compliance by following the
procedures in Sec.  63.605(d)(1)(iii)(B), certify to the Administrator
annually that the control devices and processes have not been modified
since the date of the performance test from which you obtained the data
used to establish the allowable ranges.
    (v) Each time a gypsum dewatering stack is closed, certify to the
Administrator within 90 days of closure, that the final cover of the
closed gypsum dewatering stack is a drought resistant vegetative cover
that includes a barrier soil layer that will sustain vegetation.
    (vi) If you operate a phosphate rock calciner, include the
engineering assessment as required by Sec.  63.605(d)(1)(ii) and the
information in paragraphs (b)(2)(vi)(A) through (D) of this section.
    (A) Description of the monitoring devices and monitoring
frequencies.
    (B) The established operating limits of the monitored parameter(s).
    (C) The rationale for the established operating limit, inlcuding
any data and calculations used to develop the operating limit and a
description of why the operating limit inidcates proper operation of
the control device.
    (D) The rationale used to determine which format to use for your
operating limit (e.g., operating range, minimum operating level or
maximum operating level), where this subpart does not specify which
format to use.
    (3) As required by Sec.  63.10(e)(3), you must submit an excess
emissions report for any exceedance of an emission limit, work practice
standard, or operating parameter limit if the total duration of the
exceedances for the reporting period is 1 percent of the total
operating time for the reporting period or greater. The report must
contain the information specified in Sec.  63.10 and paragraph (b)(4)

of this section. When exceedances of an emission limit or operating
parameter have not occurred, you must include such information in the
report. You must submit the report semiannually and the report must be
delivered or postmarked by the 30th day following the end of the
calendar half. If you report exceedances, you must submit the excess
emissions report quarterly until a request to reduce reporting
frequency is approved as described in Sec.  63.10(e)(3)(ii).
    (4) In the event that an affected unit fails to meet an applicable
standard, record and report the following information for each failure:
    (i) The date, time and duration of the failure.
    (ii) A list of the affected sources or equipment for which a
failure occurred.
    (iii) An estimate of the volume of each regulated pollutant emitted
over any emission limit.
    (iv) A description of the method used to estimate the emissions.
    (v) A record of actions taken to minimize emissions in accordance
with Sec.  63.608(b), and any corrective actions taken to return the
affected unit to its normal or usual manner of operation.
    (5) You must submit a summary report containing the information
specified in Sec.  63.10(e)(3)(vi). You must submit the summary report
semiannually and the report must be delivered or postmarked by the 30th
day following the end of the calendar half.
    (c) Your records must be in a form suitable and readily available
for expeditious review. You must keep each record for 5 years following
the date of each recorded action. You must keep each record on site, or
accessible from a central location by computer or other means that
instantly provides access at the site, for at least 2 years after the
date of each recorded action. You may keep the records off site for the
remaining 3 years.
    (d) In computing averages to determine compliance with this
subpart, you must exclude the monitoring data specified in paragraphs
(d)(1) through (2) of this section.
    (1) Periods of non-operation of the process unit;
    (2) Periods of no flow to a control device; and any monitoring data
recorded during CEMS or continuous parameter monitoring system (CPMS)
breakdowns, out-of-control periods, repairs, maintenance periods,
instrument adjustments or checks to maintain precision and accuracy,
calibration checks, and zero (low-level), mid-level (if applicable),
and high-level adjustments.
    (e) Within 60 days after the date of completing each performance
test (as defined in Sec.  63.2), you must submit the results of the
performance tests, including any associated fuel analyses, required by
this subpart according to the methods specified in paragraphs (e)(1) or
(2) of this section.
    (1) For data collected using test methods supported by the EPA's
Electronic Reporting Tool (ERT) as listed on the EPA's ERT Web site
(http://www.epa.gov/ttn/chief/ert/index.html), you must submit the
results of the performance test to the Compliance and Emissions Data
Reporting Interface (CEDRI) that is accessed through the EPA's Central
Data Exchange (CDX) (http://cdx.epa.gov/epa_home.asp), unless the
Administrator approves another approach. Performance test data must be
submitted in a file format generated through the use of the EPA's ERT.
Owners or operators, who claim that some of the information being
submitted for performance tests is confidential business information
(CBI), must submit a complete file generated through the use of the
EPA's ERT, including information claimed to be CBI, on a compact disk,
flash drive, or other commonly used electronic storage media to the
EPA. The electronic media must be clearly marked as CBI and mailed to
U.S. EPA/OAQPS/CORE CBI Office, Attention: WebFIRE Administrator, MD
C404-02, 4930 Old Page Rd., Durham, NC 27703. The same ERT file with
the CBI omitted must be submitted to the EPA via CDX as described
earlier in this paragraph.
    (2) For any performance test conducted using test methods that are
not supported by the EPA's ERT as listed on the EPA's ERT Web site, the
owner or operator shall submit the results of the performance test to
the Administrator at the appropriate address listed in Sec.  63.13.
    (f) Within 60 days after the date of completing each CEMS
performance evaluation (as defined in Sec.  63.2), you must submit the
results of the performance evaluation according to the method specified
by either paragraph (f)(1) or (f)(2) of this section.
    (1) For data collection of relative accuracy test audit (RATA)
pollutants that are supported by the EPA's ERT as listed on the EPA's
ERT Web site, you must submit the results of the performance evaluation
to the CEDRI that is accessed through the EPA's CDX, unless the
Administrator approves another approach. Performance evaluation data
must be submitted in a file format generated through the use of the
EPA's ERT. If you claim that some of the performance evaluation
information being transmitted is CBI, you must submit a complete file
generated through the use of the EPA's ERT, including information
claimed to be CBI, on a compact disk or other commonly used electronic
storage media (including, but not limited to, flash drives) by
registered letter to the EPA. The compact disk shall be clearly marked
as CBI and mailed to U.S. EPA/OAQPS/CORE CBI Office, Attention: WebFIRE
Administrator, MD C404-02, 4930 Old Page Rd., Durham, NC 27703. The
same ERT file with the CBI omitted must be submitted to the EPA via CDX
as described earlier in this paragraph.
    (2) For any performance evaluations with RATA pollutants that are
not supported by the EPA's ERT as listed on the EPA's ERT Web site, you
shall submit the results of the performance evaluation to the
Administrator at the appropriate address listed in Sec.  63.13.

Sec.  63.608  General requirements and applicability of part 63 general
provisions.

    (a) You must comply with the general provisions in subpart A of
this part as specified in appendix A to this subpart.
    (b) At all times, you must operate and maintain any affected
source, including associated air pollution control equipment and
monitoring equipment, in a manner consistent with safety and good air
pollution control practices for minimizing emissions. The general duty
to minimize emissions does not require you to make any further efforts
to reduce emissions if levels required by this standard have been
achieved. Determination by the Administrator of whether a source is
operating in compliance with operation and maintenance requirements
will be based on information available to the Administrator that may
include, but is not limited to, monitoring results, review of operation
and maintenance procedures, review of operation and maintenance
records, and inspection of the source.
    (c) For each CMS (including CEMS or CPMS) used to demonstrate
compliance with any applicable emission limit or work practice, you
must develop, and submit to the Administrator for approval upon
request, a site-specific monitoring plan according to the requirements
specified in paragraphs (c)(1) through (3) of this section. You must
submit the site-specific monitoring plan, if requested by the
Administrator, at least 60 days before the initial performance
evaluation of the CMS. The requirements of this paragraph also apply if
a petition is made to the Administrator for alternative monitoring
parameters under Sec.  63.8(f).

    (1) You must include the information specified in paragraphs
(c)(1)(i) through (vi) of this section in the site-specific monitoring
plan.
    (i) Location of the CMS sampling probe or other interface. You must
include a justification demonstrating that the sampling probe or other
interface is at a measurement location relative to each affected
process unit such that the measurement is representative of control of
the exhaust emissions (e.g., on or downstream of the last control
device).
    (ii) Performance and equipment specifications for the sample
interface, the pollutant concentration or parametric signal analyzer,
and the data collection and reduction systems.
    (iii) Performance evaluation procedures and acceptance criteria
(e.g., calibrations).
    (iv) Ongoing operation and maintenance procedures in accordance
with the general requirements of Sec.  63.8(c)(1)(ii), (c)(3),
(c)(4)(ii), and Table 4 to this subpart.
    (v) Ongoing data quality assurance procedures in accordance with
the general requirements of Sec.  63.8(d)(1) and (2) and Table 5 to
this subpart.
    (vi) Ongoing recordkeeping and reporting procedures in accordance
with the general requirements of Sec.  63.10(c), (e)(1), and (e)(2)(i).
    (2) You must include a schedule for conducting initial and
subsequent performance evaluations in the site-specific monitoring
plan.
    (3) You must keep the site-specific monitoring plan on site for the
life of the affected source or until the affected source is no longer
subject to the provisions of this part, to be made available for
inspection, upon request, by the Administrator. If you revise the site-
specific monitoring plan, you must keep previous (i.e., superseded)
versions of the plan on site to be made available for inspection, upon
request, by the Administrator, for a period of 5 years after each
revision to the plan. You must include the program of corrective action
required under Sec.  63.8(d)(2) in the plan.
    (d) For each bag leak detection system installed to comply with the
requirements specified in Sec.  63.605(f), you must include the
information specified in paragraphs (d)(1) and (2) of this section in
the site-specific monitoring plan specified in paragraph (c) of this
section.
    (1) Performance evaluation procedures and acceptance criteria
(e.g., calibrations), including how the alarm set point will be
established.
    (2) A corrective action plan describing corrective actions to be
taken and the timing of those actions when the bag leak detection alarm
sounds. Corrective actions may include, but are not limited to, the
actions specified in paragraphs (d)(2)(i) through (vi) of this section.
    (i) Inspecting the fabric filter for air leaks, torn or broken bags
or filter media, or any other conditions that may cause an increase in
regulated material emissions.
    (ii) Sealing off defective bags or filter media.
    (iii) Replacing defective bags or filter media or otherwise
repairing the control device.
    (iv) Sealing off a defective fabric filter compartment.
    (v) Cleaning the bag leak detection system probe or otherwise
repairing the bag leak detection system.
    (vi) Shutting down the process controlled by the fabric filter.

Sec.  63.609  [Reserved]

Sec.  63.610  Exemption from new source performance standards.

    Any affected source subject to the provisions of this subpart is
exempted from any otherwise applicable new source performance standard
contained in 40 CFR part 60, subpart T, subpart U, or subpart NN. To be
exempt, a source must have a current operating permit pursuant to title
V of the Clean Air Act and the source must be in compliance with all
requirements of this subpart. For each affected source, this exemption
is effective upon the date that you demonstrate to the Administrator
that the requirements of Sec. Sec.  63.605 and 63.606 have been met.

Sec.  63.611  Implementation and enforcement.

    (a) This subpart is implemented and enforced by the U.S. EPA, or a
delegated authority such as the applicable state, local, or Tribal
agency. If the U.S. EPA Administrator has delegated authority to a
state, local, or Tribal agency, then that agency, in addition to the
U.S. EPA, has the authority to implement and enforce this subpart.
Contact the applicable U.S. EPA Regional Office to find out if
implementation and enforcement of this subpart is delegated to a state,
local, or Tribal agency.
    (b) The authorities specified in paragraphs (b)(1) through (5) of
this section are retained by the Administrator of U.S. EPA and cannot
be delegated to State, local, or Tribal agencies.
    (1) Approval of alternatives to the requirements in Sec. Sec.
63.600, 63.602, 63.605, and 63.610.
    (2) Approval of requests under Sec. Sec.  63.7(e)(2)(ii) and
63.7(f) for alternative requirements or major changes to the test
methods specified in this subpart, as defined in Sec.  63.90.
    (3) Approval of requests under Sec.  63.8(f) for alternative
requirements or major changes to the monitoring requirements specified
in this subpart, as defined in Sec.  63.90.
    (4) Waiver or approval of requests under Sec.  63.10(f) for
alternative requirements or major changes to the recordkeeping and
reporting requirements specified in this subpart, as defined in Sec.
63.90.
    (5) Approval of an alternative to any electronic reporting to the
EPA required by this subpart.

                Table 1 to Subpart AA of Part 63--Existing Source Phase 1 Emission Limits \a\ \b\
----------------------------------------------------------------------------------------------------------------
                                       You must meet the emission limits for the specified pollutant . . .
   For the following existing   --------------------------------------------------------------------------------
         sources . . .                                        Hydrogen            Total
                                    Total  fluorides          fluoride         particulate          Mercury
----------------------------------------------------------------------------------------------------------------
Wet-Process Phosphoric Acid      0.020 lb/ton of         .................  .................  .................
 Line.                            equivalent P2O5 feed.
Superphosphoric Acid Process     0.010 lb/ton of         .................  .................  .................
 Line.                            equivalent P2O5 feed.
Superphosphoric Acid Submerged   0.20 lb/ton of          .................  .................  .................
 Line with a Submerged            equivalent P2O5 feed.
 Combustion Process.
Phosphate Rock Dryer...........  ......................  .................  0.2150 lb/ton of   .................
                                                                             phosphate rock
                                                                             feed.
Phosphate Rock Calciner........  ......................  .................  0.181 g/dscm.....  .................
----------------------------------------------------------------------------------------------------------------
\a\ The phase 1 existing source compliance date is June 10, 2002.

\b\ During periods of startup and shutdown, for emission limits stated in terms of pounds of pollutant per ton
  of feed, you are subject to the work practice standards specified in Sec.   63.602(h).

 Table 1a to Subpart AA of Part 63--Existing Source Phase 2 Emission Limits and Work Practice Standards \a\ \b\
----------------------------------------------------------------------------------------------------------------
                                 You must meet the emission limits and work practice standards for the specified
                                                                 pollutant . . .
   For the following existing   --------------------------------------------------------------------------------
         sources . . .                                        Hydrogen            Total
                                    Total  fluorides          fluoride         particulate          Mercury
----------------------------------------------------------------------------------------------------------------
Wet-Process Phosphoric Acid      ......................  0.020 lb/ton of    .................  .................
 Line.                                                    equivalent P2O5
                                                          feed.
Superphosphoric Acid Process     ......................  0.010 lb/ton of    .................  .................
 Line.                                                    equivalent P2O5
                                                          feed.
Superphosphoric Acid Submerged   ......................  0.20 lb/ton of     .................  .................
 Line with a Submerged                                    equivalent P2O5
 Combustion Process.                                      feed.
Phosphate Rock Dryer...........  ......................  .................  0.2150 lb/ton of   .................
                                                                             phosphate rock
                                                                             feed.
Phosphate Rock Calciner........  ......................  Maintain a daily   0.181 g/dscm.....  0.014 mg/dscm @3%
                                                          average                               O2
                                                          calcination
                                                          temperature
                                                          below 1,600
                                                          [deg]F, and
                                                          route emissions
                                                          to an absorber.
----------------------------------------------------------------------------------------------------------------
\a\ The phase 2 existing source compliance dates apply at different times for different pollutants as specified
  in Sec.   63.602(a).
\b\ During periods of startup and shutdown, for emission limits stated in terms of pounds of pollutant per ton
  of feed, you are subject to the work practice standards specified in Sec.   63.602(h).

                  Table 2 to Subpart AA of Part 63--New Source Phase 1 Emission Limits \a\ \b\
----------------------------------------------------------------------------------------------------------------
                                       You must meet the emissions limits for the specified pollutant . . .
For the following new sources . --------------------------------------------------------------------------------
              . .                                             Hydrogen            Total
                                    Total  fluorides          fluoride         particulate          Mercury
----------------------------------------------------------------------------------------------------------------
Wet-Process Phosphoric Acid      0.0135 lb/ton of        .................  .................  .................
 Line.                            equivalent P2O5 feed.
Superphosphoric Acid Process     0.00870 lb/ton of       .................  .................  .................
 Line.                            equivalent P2O5 feed.
Phosphate Rock Dryer...........  ......................  .................  0.060 lb/ton of    .................
                                                                             phosphate rock
                                                                             feed.
Phosphate Rock Calciner........  ......................  .................  0.092 g/dscm.....  .................
----------------------------------------------------------------------------------------------------------------
\a\ The phase 1 new source compliance dates are based on date of construction or reconstruction as specified in
  Sec.   63.602(a).
\b\ During periods of startup and shutdown, for emission limits stated in terms of pounds of pollutant per ton
  of feed, you are subject to the work practice standards specified in Sec.   63.602(h).

        Table 2a to Subpart AA of Part 63--New Source Phase 2 Emission Limits and Work Practices \a\ \b\
----------------------------------------------------------------------------------------------------------------
                                      You must meet the emissions limits and work practice standards for the
                                                            specified pollutant . . .
For the following new sources . --------------------------------------------------------------------------------
              . .                                             Hydrogen            Total
                                    Total  fluorides          fluoride         particulate          Mercury
----------------------------------------------------------------------------------------------------------------
Wet-Process Phosphoric Acid      ......................  0.0135 lb/ton of   .................  .................
 Line.                                                    equivalent P2O5
                                                          feed.
Superphosphoric Acid Process     ......................  0.00870 lb/ton of  .................  .................
 Line.                                                    equivalent P2O5
                                                          feed.
Phosphate Rock Dryer...........  ......................  .................  0.060 lb/ton of    .................
                                                                             phosphate rock
                                                                             feed.
Phosphate Rock Calciner........  ......................  Maintain a daily   0.092 g/dscm.....  0.014 mg/dscm @3%
                                                          average                               O2
                                                          calcination
                                                          temperature
                                                          below 1,600
                                                          [deg]F, and
                                                          route emissions
                                                          to an absorber.
----------------------------------------------------------------------------------------------------------------
\a\ The phase 2 new source compliance dates are based on date of construction or reconstruction as specified in
  Sec.   63.602(a).
\b\ During periods of startup and shutdown, for emission limits stated in terms of pounds of pollutant per ton
  of feed, you are subject to the work practice standards specified in Sec.   63.602(h).

                   Table 3 to Subpart AA of Part 63--Monitoring Equipment Operating Parameters
----------------------------------------------------------------------------------------------------------------
                                                              And you must monitor . .
          You must . . .                    If . . .                      .                     And . . .
----------------------------------------------------------------------------------------------------------------
                     All Absorbers (Wet Scrubbers): Choose one of the following two options
----------------------------------------------------------------------------------------------------------------
Install a continuous parameter     You choose to monitor      Influent liquid flow....  ........................
 monitoring system (CPMS) for       only the influent liquid
 liquid flow at the inlet of the    flow, rather than the
 absorber.                          liquid-to-gas ratio.
Install CPMS for liquid and gas    You choose to monitor the  Liquid-to-gas ratio as    You must measure the gas
 flow at the inlet of the           liquid-to-gas ratio,       determined by dividing    stream by:
 absorber.                          rather than only the       the influent liquid      Measuring the gas stream
                                    influent liquid flow,      flow rate by the inlet    flow at the absorber
                                    and you want the ability   gas flow rate. The        inlet; or Using the
                                    to lower liquid flow       units of measure must     design blower capacity,
                                    with changes in gas flow.  be consistent with        with appropriate
                                                               those used to calculate   adjustments for
                                                               this ratio during the     pressure drop.
                                                               performance test, or
                                                               those found in the
                                                               engineering assessment
                                                               as specified in Sec.
                                                               63.605(d)(1)(ii), as
                                                               applicable.
----------------------------------------------------------------------------------------------------------------
               Absorbers (Wet Scrubbers): You must also choose one of the following three options
----------------------------------------------------------------------------------------------------------------
Install CPMS for pressure at the   You choose to monitor      Pressure drop through     You may measure the
 gas stream inlet and outlet of     pressure drop through      the absorber.             pressure of the inlet
 the absorber.                      the absorber, and your                               gas using amperage on
                                    pressure drop through                                the blower if a
                                    the absorber is greater                              correlation between
                                    than 5 inches of water.                              pressure and amperage
                                                                                is established.
Install CPMS for temperature at    You choose to monitor      Exit gas temperature of   ........................
 the absorber gas stream outlet     exit gas temperature and   the absorber and inlet
 and pressure at the liquid inlet   inlet pressure of the      liquid pressure of the
 of the adsorber.                   liquid.                    absorber.
Install CPMS for temperature at    You choose to monitor      Exit gas temperature of   ........................
 the absorber gas stream outlet     temperature differential   the absorber and inlet
 and absorber gas stream inlet.     across the absorber.       gas temperature of the
                                                               absorber.
----------------------------------------------------------------------------------------------------------------
                                                   Condensers
----------------------------------------------------------------------------------------------------------------
Install a CPMS for temperature in  .........................  Temperature of the stack  ........................
 the stack exit gas.                                           exit gas.
----------------------------------------------------------------------------------------------------------------
                                                Sorbent Injection
----------------------------------------------------------------------------------------------------------------
Install a CPMS for flow rate.....  .........................  Sorbent injection rate..  ........................
Install a CPMS for flow rate.....  .........................  Sorbent injection         ........................
                                                               carrier gas flow rate.
----------------------------------------------------------------------------------------------------------------
                                         Wet Electrostatic Precipitators
----------------------------------------------------------------------------------------------------------------
Install secondary voltage meter..  You control mercury or     Secondary voltage.......  ........................
                                    metal HAP (particulate
                                    matter) using an
                                    electrostatic
                                    precipitator.
----------------------------------------------------------------------------------------------------------------

 Table 4 to Subpart AA of Part 63--Operating Parameters, Operating Limits and Data Monitoring, Recordkeeping and
                                             Compliance Frequencies
----------------------------------------------------------------------------------------------------------------
                                                       And you must monitor, record, and demonstrate continuous
                                  You must establish       compliance using these minimum frequencies . . .
   For the operating parameter       the following   -----------------------------------------------------------
 applicable to you, as specified   operating limit .                                            Data averaging
        in Table 3 . . .                  . .          Data measurement     Data recording        period for
                                                                                compliance
----------------------------------------------------------------------------------------------------------------
                                            Absorbers (Wet Scrubbers)
----------------------------------------------------------------------------------------------------------------
Influent liquid flow............  Minimum inlet       Continuous........  Every 15 minutes..  Daily.
                                   liquid flow.
Influent liquid flow rate and     Minimum influent    Continuous........  Every 15 minutes..  Daily.
 gas stream flow rate.             liquid-to-gas
                                   ratio.
Pressure drop...................  Pressure drop       Continuous........  Every 15 minutes..  Daily.
                                   range.
Exit gas temperature............  Maximum exit gas    Continuous........  Every 15 minutes..  Daily.
                                   temperature.
Inlet gas temperature...........  Minimum             Continuous........  Every 15 minutes..  Daily.
                                   temperature
                                   difference
                                   between inlet and
                                   exit gas.
Inlet liquid pressure...........  Minimum Inlet       Continuous........  Every 15 minutes..  Daily.
                                   liquid pressure.
----------------------------------------------------------------------------------------------------------------

                                                   Condensers
----------------------------------------------------------------------------------------------------------------
Gas temperature at the exit of    Maximum outlet gas  Continuous........  Every 15 minutes..  Daily.
 the condenser.                    temperature.
----------------------------------------------------------------------------------------------------------------
                                                Sorbent Injection
----------------------------------------------------------------------------------------------------------------
Sorbent injection rate..........  Minimum injection   Continuous........  Every 15 minutes..  Daily.
                                   rate.
----------------------------------------------------------------------------------------------------------------
Sorbent injection carrier gas     Minimum carrier     Continuous........  Every 15 minutes..  Daily.
 flow rate.                        gas flow rate.
----------------------------------------------------------------------------------------------------------------
                                                 Fabric Filters
----------------------------------------------------------------------------------------------------------------
Alarm time......................  Maximum alarm time  Continuous........  Each date and time  Maximum alarm time
                                   is not                                  of alarm start      specified in Sec.
                                   established on a                        and stop.
                                   site-specific                                               65.604(e)(1)(ix).
                                   basis but is
                                   specified in Sec.

                                   63.604(e)(1)(ix).
----------------------------------------------------------------------------------------------------------------
                                         Wet Electrostatic Precipitator
----------------------------------------------------------------------------------------------------------------
Secondary voltage...............  Secondary voltage   Continuous........  Every 15 minutes..  Daily.
                                   range.
----------------------------------------------------------------------------------------------------------------

    Table 5 to Subpart AA of Part 63--Calibration and Quality Control
     Requirements for Continuous Parameter Monitoring System (CPMS)
------------------------------------------------------------------------
                                                    And your calibration
     If you monitor this          Your accuracy     requirements are . .
       parameter . . .        requirements are . .            .
                                        .
------------------------------------------------------------------------
Temperature.................  1         Performance
                               percent over the      evaluation annually
                               normal range of       and following any
                               temperature           period of more than
                               measured or 2.8       24 hours throughout
                               degrees Celsius (5    which the
                               degrees               temperature
                               Fahrenheit),          exceeded the
                               whichever is          maximum rated
                               greater, for non-     temperature of the
                               cryogenic             sensor, or the data
                               temperature ranges.   recorder was off
                                                     scale.
                              2.5       Visual inspections
                               percent over the      and checks of CPMS
                               normal range of       operation every 3
                               temperature           months, unless the
                               measured or 2.8       CPMS has a
                               degrees Celsius (5    redundant
                               degrees               temperature sensor.
                               Fahrenheit),         Selection of a
                               whichever is          representative
                               greater, for          measurement
                               cryogenic             location.
                               temperature ranges.
Flow Rate...................  5         Performance
                               percent over the      evaluation annually
                               normal range of       and following any
                               flow measured or      period of more than
                               1.9 liters per        24 hours throughout
                               minute (0.5 gallons   which the flow rate
                               per minute),          exceeded the
                               whichever is          maximum rated flow
                               greater, for liquid   rate of the sensor,
                               flow rate.            or the data
                                                     recorder was off
                                                     scale.
                              5         Checks of all
                               percent over the      mechanical
                               normal range of       connections for
                               flow measured or      leakage monthly.
                               280 liters per       Visual inspections
                               minute (10 cubic      and checks of CPMS
                               feet per minute),     operation every 3
                               whichever is          months, unless the
                               greater, for gas      CPMS has a
                               flow rate.            redundant flow
                                                     sensor.
                              5         Selection of a
                               percent over the      representative
                               normal range          measurement
                               measured for mass     location where
                               flow rate.            swirling flow or
                                                     abnormal velocity
                                                     distributions due
                                                     to upstream and
                                                     downstream
                                                     disturbances at the
                                                     point of
                                                     measurement are
                                                     minimized.
Pressure....................  5         Checks for
                               percent over the      obstructions (e.g.,
                               normal range          pressure tap
                               measured or 0.12      pluggage) at least
                               kilopascals (0.5      once each process
                               inches of water       operating day.
                               column), whichever   Performance
                               is greater.           evaluation annually
                                                     and following any
                                                     period of more than
                                                     24 hours throughout
                                                     which the pressure
                                                     exceeded the
                                                     maximum rated
                                                     pressure of the
                                                     sensor, or the data
                                                     recorder was off
                                                     scale.
                                                    Checks of all
                                                     mechanical
                                                     connections for
                                                     leakage monthly.
                                                     Visual inspection
                                                     of all components
                                                     for integrity,
                                                     oxidation and
                                                     galvanic corrosion
                                                     every 3 months,
                                                     unless the CPMS has
                                                     a redundant
                                                     pressure sensor.
                                                    Selection of a
                                                     representative
                                                     measurement
                                                     location that
                                                     minimizes or
                                                     eliminates
                                                     pulsating pressure,
                                                     vibration, and
                                                     internal and
                                                     external corrosion.

Sorbent Injection Rate......  5         Performance
                               percent over the      evaluation
                               normal range          annually.
                               measured.            Visual inspections
                                                     and checks of CPMS
                                                     operation every 3
                                                     months, unless the
                                                     CPMS has a
                                                     redundant sensor.
                                                    Select a
                                                     representative
                                                     measurement
                                                     location that
                                                     provides
                                                     measurement of
                                                     total sorbent
                                                     injection.
Secondary voltage...........  1kV.
------------------------------------------------------------------------

 Appendix A to Subpart AA of Part 63--Applicability of General Provisions (40 CFR Part 63, Subpart A) to Subpart
                                                       AA
----------------------------------------------------------------------------------------------------------------
           40 CFR citation                   Requirement         Applies to subpart AA           Comment
----------------------------------------------------------------------------------------------------------------
Sec.   63.1(a)(1) through (4)........  General Applicability..  Yes....................  None.
Sec.   63.1(a)(5)....................  .......................  No.....................  [Reserved].
Sec.   63.1(a)(6)....................  Contact information....  Yes....................  None.
Sec.   63.1(a)(7)-(9)................  .......................  No.....................  [Reserved].
Sec.   63.1(a)(10) through (12)......  Time periods...........  Yes....................  None.
Sec.   63.1(b).......................  Initial Applicability    Yes....................  None.
                                        Determination.
Sec.   63.1(c)(1)....................  Applicability After      Yes....................  None.
                                        Standard Established.
Sec.   63.1(c)(2)....................  Permits................  Yes....................  Some plants may be area
                                                                                sources.
Sec.   63.1(c)(3)-(4)................  .......................  No.....................  [Reserved].
Sec.   63.1(c)(5)....................  Area to Major source     Yes....................  None.
                                        change.
Sec.   63.1(d).......................  .......................  No.....................  [Reserved].
Sec.   63.1(e).......................  Applicability of Permit  Yes....................  None.
                                        Program.
Sec.   63.2..........................  Definitions............  Yes....................  Additional definitions
                                                                                in Sec.   63.601.
Sec.   63.3..........................  Units and Abbreviations  Yes....................  None.
Sec.   63.4(a)(1) and (2)............  Prohibited Activities..  Yes....................  None.
Sec.   63.4(a)(3) through (5)........  .......................  No.....................  [Reserved].
Sec.   63.4(b) and (c)...............  Circumvention/           Yes....................  None.
                                        Fragmentation.
Sec.   63.5(a).......................  Construction/            Yes....................  None.
                                        Reconstruction
                                        Applicability.
Sec.   63.5(b)(1)....................  Existing, New,           Yes....................  None.
                                        Reconstructed Sources
                                        Requirements.
Sec.   63.5(b)(2)....................  .......................  No.....................  [Reserved].
Sec.   63.5(b)(3), (4), and (6)......  Construction/            Yes....................  None.
                                        Reconstruction
                                        approval and
                                        notification.
Sec.   63.5(b)(5)....................  .......................  No.....................  [Reserved]
Sec.   63.5(c).......................  .......................  No.....................  [Reserved].
Sec.   63.5(d).......................  Application for          Yes....................  None.
                                        Approval of
                                        Construction/
                                        Reconstruction.
Sec.   63.5(e).......................  Approval of              Yes....................  None.
                                        Construction/
                                        Reconstruction.
Sec.   63.5(f).......................  Approval of              Yes....................  None.
                                        Construction/
                                        Reconstruction Based
                                        on State Review.
Sec.   63.6(a).......................  Compliance with          Yes....................  None.
                                        Standards and
                                        Maintenance
                                        Applicability.
Sec.   63.6(b)(1) through (5)........  New and Reconstructed    Yes....................  See also Sec.   63.602.
                                        Sources Dates.
Sec.   63.6(b)(6)....................  .......................  No.....................  [Reserved].
Sec.   63.6(b)(7)....................  Area to major source     Yes....................  None.
                                        change.
Sec.   63.6(c)(1) and (2)............  Existing Sources Dates.  Yes....................  Sec.   63.602 specifies
                                                                                dates.
Sec.   63.6(c)(3) and (4)............  .......................  No.....................  [Reserved].
Sec.   63.6(c)(5)....................  Area to major source     Yes....................  None.
                                        change.
Sec.   63.6(d).......................  .......................  No.....................  [Reserved].
Sec.   63.6(e)(1)(i) and (ii)........  Operation & Maintenance  No.....................  See Sec.   63.608(b)
                                        Requirements.                                     for general duty
                                                                                requirement.
Sec.   63.6(e)(iii)..................  .......................  Yes....................  None.
Sec.   63.6(e)(2)....................  .......................  No.....................  [Reserved].
Sec.   63.6(e)(3)....................  Startup, Shutdown, and   No.....................  None.
                                        Malfunction Plan.
Sec.   63.6(f).......................  Compliance with          No.....................  See general duty at
                                        Emission Standards.                               Sec.   63.608(b).
Sec.   63.6(g).......................  Alternative Standard...  Yes....................  None.
Sec.   63.6(h).......................  Compliance with Opacity/ No.....................  Subpart AA does not
                                        VE Standards.                                     include VE/opacity
                                                                                standards.
Sec.   63.6(i)(1) through (14).......  Extension of Compliance  Yes....................  None.
Sec.   63.6(i)(15)...................  .......................  No.....................  [Reserved].
Sec.   63.6(i)(16)...................  .......................  Yes....................  None.

Sec.   63.6(j).......................  Exemption from           Yes....................  None.
                                        Compliance.
Sec.   63.7(a).......................  Performance Test         Yes....................  None.
                                        Requirements
                                        Applicability.
Sec.   63.7(b).......................  Notification...........  Yes....................  None.
Sec.   63.7(c).......................  Quality Assurance/Test   Yes....................  None.
                                        Plan.
Sec.   63.7(d).......................  Testing Facilities.....  Yes....................  None.
Sec.   63.7(e)(1)....................  Conduct of Tests;        No.....................  Sec.   63.606 specifies
                                        startup, shutdown, and                            additional
                                        malfunction provisions.                           requirements.
Sec.   63.7(e)(2) through (4)........  Conduct of Tests.......  Yes....................  Sec.   63.606 specifies
                                                                                additional
                                                                                requirements.
Sec.   63.7(f).......................  Alternative Test Method  Yes....................  None.
Sec.   63.7(g).......................  Data Analysis..........  Yes....................  None.
Sec.   63.7(h).......................  Waiver of Tests........  Yes....................  None.
Sec.   63.8(a).......................  Monitoring Requirements  Yes....................  None.
                                        Applicability.
Sec.   63.8(b).......................  Conduct of Monitoring..  Yes....................  None.
Sec.   63.8(c)(1)(i).................  General duty to          No.....................  See 63.608(b) for
                                        minimize emissions and                            general duty
                                        CMS operation.                                    requirement.
Sec.   63.8(c)(1)(ii)................  .......................  Yes....................  None.
Sec.   63.8(c)(1)(iii)...............  Requirement to develop   No.....................  None.
                                        SSM Plan for CMS.
Sec.   63.8(c)(2) through (4)........  CMS Operation/           Yes....................  None.
                                        Maintenance.
Sec.   63.8(c)(5)....................  COMS Operation.........  No.....................  Subpart AA does not
                                                                                require COMS.
Sec.   63.8(c)(6) through(8).........  CMS requirements.......  Yes....................  None.
Sec.   63.8(d)(1) and (2)............  Quality Control........  Yes....................  None.
Sec.   63.8(d)(3)....................  Written procedure for    No.....................  See Sec.   63.608 for
                                        CMS.                                              requirement.
Sec.   63.8(e).......................  CMS Performance          Yes....................  None.
                                        Evaluation.
Sec.   63.8(f)(1) through (5)........  Alternative Monitoring   Yes....................  None.
                                        Method.
Sec.   63.8(f)(6)....................  Alternative to RATA      Yes....................  None.
                                        Test.
Sec.   63.8(g)(1)....................  Data Reduction.........  Yes....................  None.
Sec.   63.8(g)(2)....................  .......................  Yes....................  None.
Sec.   63.8(g)(3) through (5)........  .......................  Yes....................  None.
Sec.   63.9(a).......................  Notification             Yes....................  None.
                                        Requirements
                                        Applicability.
Sec.   63.9(b).......................  Initial Notifications..  Yes....................  None.
Sec.   63.9(c).......................  Request for Compliance   Yes....................  None.
                                        Extension.
Sec.   63.9(d).......................  New Source Notification  Yes....................  None.
                                        for Special Compliance
                                        Requirements.
Sec.   63.9(e).......................  Notification of          Yes....................  None.
                                        Performance Test.
Sec.   63.9(f).......................  Notification of VE/      No.....................  Subpart AA does not
                                        Opacity Test.                                     include VE/opacity
                                                                                standards.
Sec.   63.9(g).......................  Additional CMS           Yes....................  Subpart AA does not
                                        Notifications.                                    require CMS
                                                                                performance
                                                                                evaluation, COMS, or
                                                                                CEMS.
Sec.   63.9(h)(1) through (3)........  Notification of          Yes....................  None.
                                        Compliance Status.
Sec.   63.9(h)(4)....................  .......................  No.....................  [Reserved].
Sec.   63.9(h)(5) and (6)............  .......................  Yes....................  None.
Sec.   63.9(i).......................  Adjustment of Deadlines  Yes....................  None.
Sec.   63.9(j).......................  Change in Previous       Yes....................  None.
                                        Information.
Sec.   63.10(a)......................  Recordkeeping/Reporting- Yes....................  None.
                                        Applicability.
Sec.   63.10(b)(1)...................  General Recordkeeping    Yes....................  None.
                                        Requirements.
Sec.   63.10(b)(2)(i)................  Startup or shutdown      No.....................  None.
                                        duration.
Sec.   63.10(b)(2)(ii)...............  Malfunction............  No.....................  See Sec.   63.607 for
                                                                                recordkeeping and
                                                                                reporting requirement.
Sec.   63.10(b)(2)(iii)..............  Maintenance records....  Yes....................  None.
Sec.   63.10(b)(2)(iv) and (v).......  Startup, shutdown,       No.....................  None.
                                        malfunction actions.
Sec.   63.10(b)(2)(vi) through (xiv).  General Recordkeeping    Yes....................  None.
                                        Requirements.
Sec.   63.10(b)(3)...................  General Recordkeeping    Yes....................  None.
                                        Requirements.
Sec.   63.10(c)(1)...................  Additional CMS           Yes....................  None.
                                        Recordkeeping.
Sec.   63.10(c)(2) through (4).......  .......................  No.....................  [Reserved].
Sec.   63.10(c)(5)...................  .......................  Yes....................  None.
Sec.   63.10(c)(6)...................  .......................  Yes....................  None.
Sec.   63.10(c)(7) and (8)...........  .......................  Yes....................  None.
Sec.   63.10(c)(9)...................  .......................  No.....................  [Reserved].
Sec.   63.10(c)(10) through (13).....  .......................  Yes....................  None.
Sec.   63.10(c)(14)..................  .......................  Yes....................  None.
Sec.   63.10(c)(15)..................  Startup Shutdown         No.....................  None.
                                        Malfunction Plan
                                        Provisions.
Sec.   63.10(d)(1)...................  General Reporting        Yes....................  None.
                                        Requirements.
Sec.   63.10(d)(2)...................  Performance Test         Yes....................  None.
                                        Results.
Sec.   63.10(d)(3)...................  Opacity or VE            No.....................  Subpart AA does not
                                        Observations.                                     include VE/opacity
                                                                                standards.

Sec.   63.10(d)(4)...................  Progress Reports.......  Yes....................  None.
Sec.   63.10(d)(5)...................  Startup, Shutdown, and   No.....................  See Sec.   63.607 for
                                        Malfunction Reports.                              reporting of excess
                                                                                emissions.
Sec.   63.10(e)(1) and (2)...........  Additional CMS Reports.  Yes....................  None.
Sec.   63.10(e)(3)...................  Excess Emissions/CMS     Yes....................  None.
                                        Performance Reports.
Sec.   63.10(e)(4)...................  COMS Data Reports......  No.....................  Subpart AA does not
                                                                                require COMS.
Sec.   63.10(f)......................  Recordkeeping/Reporting  Yes....................  None.
                                        Waiver.
Sec.   63.11.........................  Control Device and Work  Yes....................  None.
                                        Practice Requirements.
Sec.   63.12.........................  State Authority and      Yes....................  None.
                                        Delegations.
Sec.   63.13.........................  Addresses..............  Yes....................  None.
Sec.   63.14.........................  Incorporation by         Yes....................  None.
                                        Reference.
Sec.   63.15.........................  Information              Yes....................  None.
                                        Availability/
                                        Confidentiality.
Sec.   63.16.........................  Performance Track        No.....................  Terminated.
                                        Provisions.
----------------------------------------------------------------------------------------------------------------

0
21. Part 63 is amended by revising subpart BB to read as follows:

Subpart BB--National Emission Standards for Hazardous Air
Pollutants From Phosphate Fertilizers Production Plants

Sec.
63.620 Applicability.
63.621 Definitions.
63.622 Standards and compliance dates.
63.623 [Reserved]
63.624 [Reserved]
63.625 Operating and monitoring requirements.
63.626 Performance tests and compliance provisions.
63.627 Notification, recordkeeping, and reporting requirements.
63.628 General requirements and applicability of part 63 general
provisions.
63.629 Miscellaneous requirements.
63.630 [Reserved]
63.631 Exemption from new source performance standards.
63.632 Implementation and enforcement.
Table 1 to Subpart BB of Part 63--Existing Source Phase 1 Emission
Limits
Table 1a to Subpart BB of Part 63--Existing Source Phase 2 Emission
Limits
Table 2 to Subpart BB of Part 63--New Source Phase 1 Emission Limits
Table 2a to Subpart BB of Part 63--New Source Phase 2 Emission
Limits
Table 3 to Subpart BB of Part 63--Monitoring Equipment Operating
Parameters
Table 4 to Subpart BB of Part 63--Operating Parameters, Operating
Limits and Data Monitoring, Recordkeeping and Compliance Frequencies
Table 5 to Subpart BB of Part 63--Calibration and Quality Control
Requirements for Continuous Parameter Monitoring Systems (CPMS)
Appendix A to Subpart BB of Part 63--Applicability of General
Provisions (40 CFR Part 63, Subpart A) to Subpart BB

Sec.  63.620  Applicability.

    (a) Except as provided in paragraphs (c) and (d) of this section,
you are subject to the requirements of this subpart if you own or
operate a phosphate fertilizer production plant that is a major source
as defined in Sec.  63.2. You must comply with the emission
limitations, work practice standards, and operating parameter
requirements specified in this subpart at all times.
    (b) The requirements of this subpart apply to emissions of
hazardous air pollutants (HAP) emitted from the following affected
sources at a phosphate fertilizer production plant:
    (1) Each diammonium and/or monoammonium phosphate process line and
any process line that produces a reaction product of ammonia and
phosphoric acid.
    (2) Each granular triple superphosphate process line.
    (3) Each granular triple superphosphate storage building.
    (c) The requirements of this subpart do not apply to a phosphate
fertilizer production plant that is an area source as defined in Sec.
63.2.
    (d) The provisions of this subpart do not apply to research and
development facilities as defined in Sec.  63.621.

Sec.  63.621  Definitions.

    Terms used in this subpart are defined in Sec.  63.2 of the Clean
Air Act and in this section as follows:
    Diammonium and/or monoammonium phosphate process line means any
process line manufacturing granular diammonium and/or monoammonium
phosphate by reacting ammonia with phosphoric acid that has been
derived from or manufactured by reacting phosphate rock and acid. A
diammonium and/or monoammonium phosphate process line includes, but is
not limited to: Reactors, granulators, dryers, coolers, cooling towers,
screens, and mills.
    Equivalent P2O5 feed means the quantity of phosphorus, expressed as
phosphorus pentoxide (P2O5), fed to the process.
    Equivalent P2O5 stored means the quantity of phosphorus, expressed
as phosphorus pentoxide, being cured or stored in the affected
facility.
    Exceedance means a departure from an indicator range established
for monitoring under this subpart, consistent with any averaging period
specified for averaging the results of the monitoring.
    Existing source depends on the date that construction or
reconstruction of an affected source commenced. A process line that
produces a reaction product of ammonia and phosphoric acid (e.g.,
diammonium and/or monoammonium phosphate process line), granular triple
superphosphate process line, or granular triple superphosphate storage
is an existing source if construction or reconstruction of the affected
source commenced on or before December 27, 1996.
    Fresh granular triple superphosphate means granular triple
superphosphate produced within the preceding 72 hours.
    Phosphate fertilizer process line or production plant means any
process line or production plant that manufactures a phosphate
fertilizer by reacting phosphoric acid with ammonia.
    Granular triple superphosphate process line means any process line,
not including storage buildings, that manufactures granular triple
superphosphate by reacting phosphate rock with phosphoric acid. A
granular triple superphosphate process line

includes, but is not limited to: Mixers, curing belts (dens), reactors,
granulators, dryers, coolers, cooling towers, screens, and mills.
    Granular triple superphosphate storage building means any building
curing or storing fresh granular triple superphosphate. A granular
triple superphosphate storage building includes, but is not limited to:
Storage or curing buildings, conveyors, elevators, screens, and mills.
    New source depends on the date that construction or reconstruction
of an affected source commences. A process line that produces a
reaction product of ammonia and phosphoric acid (e.g., diammonium and/
or monoammonium phosphate process line), granular triple superphosphate
process line, or granular triple superphosphate storage is a new source
if construction or reconstruction of the affected source commenced
after December 27, 1996.
    Research and development facility means research or laboratory
operations whose primary purpose is to conduct research and development
into new processes and products, where the operations are under the