Terms used in this subpart are defined in the Clean Air Act, Sec. 63.2, and in this section as follows:
Area source means any stationary source of hazardous air pollutants that is not a major source as defined in this part.
Compliance ratio means the ratio of the actual HAP loss from the previous 12 months to the allowable HAP loss from the previous 12 months. Equation 1 in Sec. 63.5330 is used to calculate this value. If the value is less than or equal to 1.00, the source is in compliance. If the value is greater than 1.00, the source is deviating from compliance.
Deviation means any instance in which an affected source subject to this subpart, or an owner or operator of such a source:
(1) Fails to meet any requirement or obligation established by this subpart, including but not limited to any emission limits or work practice standards.
(2) Fails to meet any emission limits, operating limits, or work practice standards in this subpart during startup, shutdown, or malfunction, regardless of whether or not such failure is permitted by this subpart.
Drying means the process of removing all but equilibrium moisture from the leather. Drying methods currently in use include: toggling, hanging, pasting, and vacuum drying.
Finish add-on means the amount of solid material deposited on the leather substrate due to finishing operations. Typically, the solid deposition is a dye or other chemical used to enhance the color and performance of the leather. Finish add-on is quantified as mass per surface area of substrate, such as grams of finish add-on per square foot of leather substrate.
Hazardous air pollutants (HAP) means any substance or mixture of substances listed as a hazardous air pollutant under section 112(b) of the Clean Air Act.
Leather means the pelt or hide of an animal which has been transformed by a tanning process into a nonputrescible and useful material.
Leather finishing means a single process or group of processes used to adjust and improve the physical and aesthetic characteristics of the leather surface through the multistage application of a coating comprised of dyes, pigments, film-forming materials, and performance modifiers dissolved or suspended in liquid carriers.
Leather substrate means a nonputrescible leather surface intended for the application of finishing chemicals and materials. The leather substrate may be a continuous piece of material such as side leather or may be a combination of smaller leather pieces and leather fibers, which when joined together, form an integral composite leather material.
Leather tanning means the processes, commonly referred to as wet operations, used to purify and stabilize the collagen content of the hide. Wet operations are divided into three phases, the beamhouse (includes soaking and unhairing); the tanyard (includes bating, pickling, tanning, trimming/siding, and splitting); and the coloring department (includes retanning, coloring, and atliquoring operations).
Month means that all references to a month in this subpart refer to a calendar month.
Nonwater-resistant leather means nonupholstery leather that is not treated with any type of waterproof finish and, thus, cannot withstand 5,000 Maeser Flexes with a Maeser Flex Testing Machine or a method approved by the Administrator prior to initial water penetration. This leather is typically used for dress shoes, handbags, and garments.
Product process operation means any one of the four leather production classifications developed for ease of compliance with this subpart. The four leather product process operations are as follows: upholstery leather with greater than or equal to 4 grams finish add-on per square foot, upholstery leather with less than 4 grams finish add-on per square foot, water-resistant/specialty leather, and nonwater-resistant leather.
Specialty leather means a select grade of chrome tanned, bark retanned, or fat liquored leather that is retanned through the application of grease, waxes, and oil in quantities greater than 12 percent of the dry leather weight or high-quality dress or performance shoe leather that can withstand one or more of the following visual tests: moisture injection into the leather using vacuum mulling without signs of blistering, or prolonged ironing at 200 [deg]F for smoothing out surface roughness without finish lift off. Specialty leather is also finished with higher solvent-based finishes that provide rich color, luster, or an oily/tacky feel. Specialty leather products are generally low volume, high-quality leather, such as specialty shoe leather and top grade football leathers.
Upholstery leather (greater than or equal to 4 grams finish add-on per square foot) means an upholstery leather with a final finish add-on to leather ratio of 4 or more grams of finish per square foot of leather. These types of finishes are used primarily for automobile seating covers. These finishes tend to be aqueous-based.
Upholstery leather (less than 4 grams finish add-on per square foot) means an upholstery leather with a final finish add-on to leather ratio of less than 4 grams of finish per square foot of leather. These types of finishes are typically used for furniture seating covers. The finishes tend to be solvent-based and leave a thinner, softer, and more natural leather texture.
Vacuum mulling means the injection of water into the leather substrate using a vacuum process to increase the moisture content of the leather.
Water-resistant leather means nonupholstery leather that has been treated with one or more waterproof finishes such that the leather can withstand 5,000 or more Maeser Flexes with a Maeser Flex Testing Machine or a method approved by the Administrator prior to initial water penetration. This leather is used for outerwear, boots and outdoor applications. [67 FR 9162, Feb. 27, 2002, as amended at 70 FR 6360, Feb. 7, 2005]
Sec. Figure 1 to Subpart TTTT of Part 63--Example Logs for Recording
Leather Finish Use and HAP Content Month:------------ Year:------------
Finish Inventory Log----------------------------------------------------------------------------------------------------------------
Finish usage HAP Content (mass Product process
Finish type (pounds) fraction) Date and time Operator's name operation----------------------------------------------------------------------------------------------------------------
----------------------------------------------------------------------------------------------------------------
Monthly Summary of Finish Usage----------------------------------------------------------------------------------------------------------------
Upholstery leather Upholstery Nonwater-
(=4 leather (<4 Water-resistant/ resistant
grams) grams) specialty leather leather----------------------------------------------------------------------------------------------------------------Number of Entries.................Total Finish Usage (pounds).......Total HAP Usage (pounds)..........---------------------------------------------------------------------------------------------------------------- Sec. Table 1 to Subpart TTTT of Part 63--Leather Finishing HAP Emission
Limits for Determining the Allowable HAP Loss
As required in Sec. Sec. 63.5305 and 63.5340(b), you must meet the appropriate emission limits in the following table: ------------------------------------------------------------------------
HAP Emission Limit (pounds of HAP
loss per 1,000 square feet of
Type of Leather Product Process leather processed)
Operation -------------------------------------
Existing sources New sources------------------------------------------------------------------------1. Upholstery Leather (=4 grams add-on/square feet)..2. Upholstery Leather (<4 grams 6.8 2.5
add-on/square feet)..............3. Water-resistant (=5,000 Maeser Flexes)/
Specialty Leather................4. Nonwater-resistant Leather 3.7 2.1
(<5,000 Maeser Flexes)...........------------------------------------------------------------------------ Sec. Table 2 to Subpart TTTT of Part 63--Leather Finishing HAP Emission
Limits for Determining the Allowable HAP Loss
As required in Sec. 63.5450, you must meet the appropriate NESHAP General Provision requirements in the following table: ----------------------------------------------------------------------------------------------------------------
Subject of Brief description
General provisions citation citation of requirement Applies to subpart Explanation----------------------------------------------------------------------------------------------------------------Sec. 63.1..................... Applicability..... Initial Yes
applicability
determination;
applicability
after standard
established;
permit
requirements;
extensions,
notifications.Sec. 63.2..................... Definitions....... Definitions for Yes............... Except as
Part 63 standards. specifically
provided in this
subpart.Sec. 63.3..................... Units and Units and Yes
abbreviations. abbreviations for
Part 63 standards.Sec. 63.4..................... Prohibited Prohibited Yes
activities and activities;
circumvention. compliance date;
circumvention,
severability.Sec. 63.5..................... Construction/ Applicability; Yes............... Except for
reconstruction. applications; paragraphs of
approvals. Sec. 63.5 as
listed below.Sec. 63.5(c).................. [Reserved]Sec. 63.5(d)(1)(ii)(H)........ Application for Type and quantity No................ All sources emit
approval. of HAP, operating HAP. Subpart TTTT
parameters. does not require
control from
specific emission
points.Sec. 63.5(d)(1)(i)............ [Reserved]
Sec. 63.5(d)(1)(iii), (d)(2), .................. Application for No................ The requirements
(d)(3)(ii). approval. of the
(3)(ii). approval. of the
(ii). approval. of the
application for
approval for new
and reconstructed
sources are
described in Sec.
63.5320(b).
General provision
requirements for
identification of
HAP emission
points or
estimates of
actual emissions
are not required.
Descriptions of
control and
methods, and the
estimated and
actual control
efficiency of
such do not
apply.
Requirements for
describing
control equipment
and the estimated
and actual
control
efficiency of
such equipment
apply only to
control equipment
to which the
subpart TTTT
requirements for
quantifying
solvent destroyed
by an add-on
control device
would be
applicable.Sec. 63.6..................... Applicability of Applicability of Yes............... Except for
general general paragraphs of
provisions. provisions. Sec. 63.6 as
listed below.Sec. 63.6(b)(1)-(3)........... Compliance dates, .................. No................ Section Sec.
new and 63.5283 specifies
reconstructed the compliance
sources. dates for new and
reconstructed
sources.Sec. 63.6(b)(6)............... [Reserved]Sec. 63.6(c)(3)-(4)........... [Reserved]Sec. 63.6(d).................. [Reserved]Sec. 63.6(e).................. Operation and .................. Yes............... Except for
maintenance subordinate
requirements. paragraphs of
Sec. 63.6(e) as
listed below.Sec. 63.6(e)(3)............... Operation and Startup, shutdown, No................ Subpart TTTT does
maintenance and malfunction not have any
requirements. plan requirements. startup,
shutdown, and
malfunction plan
requirements.Sec. 63.6(f)-(g).............. Compliance with Comply with No................ Subpart TTTT does
nonopacity emission not have
emission standards at all nonopacity
standards except times except requirements.
during SSM. during SSM.Sec. 63.6(h).................. Opacity/visible .................. No................ Subpart TTTT has
emission (VE) no opacity or
standards. visual emission
standards.Sec. 63.6(i).................. Compliance Procedures and Yes
extension. criteria for
responsible
agency to grant
compliance
extension.Sec. 63.6(j).................. Presidential President may Yes
compliance exempt source
exemption. category from
requirement to
comply with
subpart.Sec. 63.7..................... Performance Schedule, Yes............... Except for
testing conditions, paragraphs of
requirements. notifications and Sec. 63.7 as
procedures. listed below.
Subpart TTTT
requires
performance
testing only if
the source
applies
additional
control that
destroys solvent.
Sec. 63.5311
requires sources
to follow the
performance
testing
guidelines of the
General
Provisions if a
control is added.Sec. 63.7(a)(2) (i) and (iii). Performance Applicability and No................ Sec. 63.5310(a)
testing performance dates. of subpart TTTT
requirements. specifies the
requirements of
performance
testing dates for
new and existing
sources.Sec. 63.8..................... Monitoring .................. No................ Subpart TTTT does
requirements. not require
monitoring other
than as specified
therein.Sec. 63.9..................... Notification Applicability and Yes............... Except for
requirements. State delegation. paragraphs of
Sec. 63.9 as
listed below.Sec. 63.9(e).................. Notification of Notify responsible Yes............... Applies only if
performance test. agency 60 days performance
ahead. testing is
performed.Sec. 63.9(f).................. Notification of VE/ Notify responsible No................ Subpart TTTT has
opacity agency 30 days no opacity or
observations. ahead. visual emission
standards.
Sec. 63.9(g).................. Additional Notification of No................ Subpart TTTT has
notifications performance no CMS
when using a evaluation; requirements.
continuous notification
monitoring system using COMS data;
(CMS). notification that
exceeded
criterion for
relative accuracy.Sec. 63.9(h).................. Notification of Contents.......... No................ Sec. 63.5320(d)
compliance status. specifies
requirements for
the notification
of compliance
status.Sec. 63.10.................... Recordkeeping/ Schedule for Yes............... Except for
reporting. reporting, record paragraphs of
storage. Sec. 63.10 as
listed below.Sec. 63.10(b)(2).............. Recordkeeping..... Record startup, No................ Subpart TTTT has
shutdown, and no recordkeeping
malfunction requirements for
events. startup,
shutdown, and
malfunction
events.Sec. 63.10(c)................. Recordkeeping..... Additional CMS No................ Subpart TTTT does
recordkeeping. not require CMS.Sec. 63.10(d)(2).............. Reporting......... Reporting Yes............... Applies only if
performance test performance
results. testing is
performed.Sec. 63.10(d)(3).............. Reporting......... Reporting opacity No................ Subpart TTTT has
or VE no opacity or
observations. visible emission
standards.Sec. 63.10(d)(4).............. Reporting......... Progress reports.. Yes............... Applies if a
condition of
compliance
extension.Sec. 63.10(d)(5).............. Reporting......... Startup, shutdown, No................ Subpart TTTT has
and malfunction no startup,
reporting. shutdown, and
malfunction
reporting
requirements.Sec. 63.10(e)................. Reporting......... Additional CMS No................ Subpart TTTT does
reports. not require CMS.Sec. 63.11.................... Control device Requirements for Yes............... Applies only if
requirements. flares. your source uses
a flare to
control solvent
emissions.
Subpart TTTT does
not require
flares.Sec. 63.12.................... State authority State authority to Yes
and delegations. enforce standards.Sec. 63.13.................... State/regional Addresses where Yes
addresses. reports,
notifications,
and requests are
sent.Sec. 63.14.................... Incorporation by Test methods Yes
reference. incorporated by
reference.Sec. 63.15.................... Availability of Public and Yes
information and confidential
confidentiality. information.----------------------------------------------------------------------------------------------------------------
Subpart UUUU_National Emission Standards for Hazardous Air Pollutants
for Cellulose Products Manufacturing
Source: 67 FR 40055, June 11, 2002, unless otherwise noted.
What This Subpart Covers