AQ_F_0100310_20210303_PRMT_Permit

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary �.�'�A .L
MICHAEL A. ABRACZINSKAS NORTH CAROLINA
U;reelor Environmental Quality
March 3, 2021
Michael Harvey
General Manager
Flexaust, Inc.
1902 Tucker Street
Burlington,NC 27215-6733
Subject: Air Permit No. 10670R00
Flexaust, Inc.
Burlington, Alamance County, North Carolina
Permit Class: Small
Facility ID# 0 1003 10
Dear Mr. Harvey:
In accordance with your completed application received February 4, 2021, we are
forwarding herewith Permit No. 10670R00 to Flexaust, Inc., Burlington, Alamance County,North
Carolina for the construction and operation of air emissions sources or air cleaning devices and
appurtenances. Additionally, any emissions activities determined from your air permit application
as meeting the exemption requirements contained in 15A NCAC 2Q .0102 have been listed for
information purposes as an "ATTACHMENT" to the enclosed air permit. Please note the records
retention requirements are contained in General Condition 2 of the General Conditions and
Limitations.
If any parts, requirements, or limitations contained in this permit are unacceptable to you,
you have the right to request a formal adjudicatory hearing within 30 days following receipt of this
permit, identifying the specific issues to be contested. Such a request will stay the effectiveness of
the entire permit. This hearing request must be in the form of a written petition, conforming to G.S.
150B-23 of the North Carolina General Statutes, and filed with the Office of Administrative
Hearings, 6714 Mail Service Center, Raleigh,NC 27699-6714. The form for requesting a formal
adjudicatory hearing may be obtained upon request from the Office of Administrative Hearings.
Unless a request for a hearing is made pursuant to G.S. 15013-23,this air permit shall be final and
binding.
You may request modification of your air permit through informal means pursuant to G.S.
15013-22. This request must be submitted in writing to the Director and must identify the specific
provisions or issues for which the modification is sought. Please note that the permit will become
final and binding regardless of a request for informal modification unless a request for a hearing is
also made under G.S. 15013-23.
North Carolina Department of Environmental Quality I Division of Air Quality
DE. Winston-Salem Regional Office 1 450 West Hanes Mill Road,Suite 300 1 Winston-Salem,NC 27105
h.i
n ebr i ;r y o6;rnm;n n7ii,y 336.776.9800 T 1 336.776.9797 F

Michael Harvey
March 3, 2021
Page 2
Unless exempted by a condition of this permit or the regulations, construction of new
air pollution sources or air cleaning devices, or modifications to the sources or air cleaning
devices described in this permit must be covered under a permit issued by the Division of Air
Quality prior to construction. Failure to do so is a violation of G.S. 143-215.108 and may
subject the Permittee to civil or criminal penalties as described in G.S. 143-215.114A and 143-
215.114B.
This permit shall be effective from March 3, 2021 until February 28, 2029, is
nontransferable to future owners and operators, and shall be subject to the conditions and limitations
as specified therein.
The Permittee is responsible for carefully reading the entire permit and evaluating the
requirements of each permit stipulation. The Permittee shall comply with all terms,
conditions, requirements, limitations and restrictions set forth in this permit. Noncompliance
with any permit condition is grounds for enforcement action, for permit termination,
revocation and reissuance, or modification, or for denial of a permit renewal application.
Should you have any questions concerning this matter,please contact Leo L. Governale, P.E. at
336-776-9638 or via email at [e-mail].
Sincerely,
iw
Supervisor
LLG
Enclosures
c: Winston-Salem Regional Office

NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF AIR QUALITY
AIR PERMIT NO. 10670R00
Issue Date: March 3, 2021 Effective Date: March 3, 2021
Expiration Date: February 28, 2029 Replaces Permit: (new)
To construct and operate air emission source(s) and/or air cleaning device(s), and for the
discharge of the associated air contaminants into the atmosphere in accordance with the provisions
of Article 21 B of Chapter 143, General Statutes of North Carolina (NCGS) as amended, and other
applicable Laws, Rules and Regulations,
Flexaust, Inc.
1902 Tucker Street
Burlington, Alamance County, North Carolina
Permit Class: Small
Facility ID# 0 1003 10
(the Permittee) is hereby authorized to construct and operate the air emissions sources and/or air
cleaning devices and appurtenances described below:
Emission _ Emission Source _ mControl _ Control System
Source ID Description System ID Description
EU-1 Adhesive/Tape Line N/A 3 N/A
............................................................._----............................................._.................................................................................. .................................................................._......._.....----........._............................................................................................................_._.........._................................_...........,
in accordance with the completed application 0100310.20A received February 4, 2021 including
any plans, specifications,previous applications, and other supporting data, all of which are fled
with the Department of Environmental Quality, Division of Air Quality (DAQ) and are incorporated
as part of this permit.
This permit is subject to the following specified conditions and limitations including any
TESTING, REPORTING, OR MONITORING REQUIREMENTS:
A. SPECIFIC CONDITIONS AND LIMITATIONS
1. Any air emission sources or control devices authorized to construct and operate,above must
be operated and maintained in accordance with the provisions contained herein. The
Permittee shall comply with applicable Environmental Management Commission
Regulations, including Title 15A North Carolina Administrative Code (NCAC), Subchapter
2D .0202, 2D .0521, 2D .0535, 2D .0540, 2D .1100 and 2Q .0711.

Permit No. 10670R00
Page 2
2. PERMIT RENEWAL AND EMISSION INVENTORY REQUIREMENT - The Permittee,
at least 90 days prior to the expiration date of this permit, shall request permit renewal by
letter in accordance with 15A NCAC 2Q .0304(d) and (f). Pursuant to 15A NCAC 2Q
.0203(i), no permit application fee is required for renewal of an existing air permit (without
a modification request). The renewal request(with application Form A) should be submitted
to the Regional Supervisor, DAQ. Also, at least 90 days prior to the expiration date of this
permit, the Permittee shall submit the air pollution emission inventory report(with
Certification Sheet) in accordance with 15A NCAC 2D .0202, pursuant to N.C. General
Statute 143 215.65. The report shall be submitted to the Regional Supervisor, DAQ and shall
document air pollutants emitted for the 2027 calendar year.
3. VISIBLE EMISSIONS CONTROL REQUIREMENT - As required by 15A NCAC 2D
.0521 "Control of Visible Emissions," visible emissions from the emission sources,
manufactured after July 1, 1971, shall not be more than 20 percent opacity when averaged
over a six-minute period, except that six-minute periods averaging not more than 87 percent
opacity may occur not more than once in any hour nor more than four times in any 24-hour
period. However, sources which must comply with a visible emissions standard in 15A
NCAC 2D .0524 "New Source Performance Standards" or .I 110 "National Emission
Standards for Hazardous Air Pollutants" shall meet that standard instead of the 2D .0521
visible emissions standard.
4. NOTIFICATION REQUIREMENT - As required by 15A NCAC 2D .0535, the Permittee of
a source of excess emissions that last for more than four hours and that results from a
malfunction, a breakdown of process or control equipment or any other abnormal
conditions, shall:
a. Notify the Director or his designee of any such occurrence by 9:00 a.m. Eastern time
of the Division's next business day of becoming aware of the occurrence and
describe:
i. the name and location of the facility,
ii. the nature and cause of the malfunction or breakdown,
ill. the time when the malfunction or breakdown is first observed,
iv. the expected duration, and
V. an estimated rate of emissions.
b. Notify the Director or his designee immediately when the corrective measures have
been accomplished.
This reporting requirement does not allow the operation of the facility in excess of
Environmental Management Commission Regulations.
5. FUGITIVE DUST CONTROL REQUIREMENT - As required by 15A NCAC 2D .0540
"Particulates from Fugitive Dust Emission Sources," the Permittee shall not cause or allow
fugitive dust emissions to cause or contribute to substantive complaints or excess visible
emissions beyond the property boundary. If substantive complaints are received or excessive

Permit No. 10670R00
Page 3
fugitive dust emissions from the facility are observed beyond the property boundaries for six
minutes in any one hour (using Reference Method 22 in 40 CFR, Appendix A),the owner or
operator may be required to submit a fugitive dust plan as described in 2D .0540(f).
"Fugitive dust emissions" means particulate matter that does not pass through a process
stack or vent and that is generated within plant property boundaries from activities such as:
unloading and loading areas, process areas stockpiles, stock pile working, plant parking lots,
and plant roads (including access roads and haul roads).
6. TOXIC AIR POLLUTANT EMISSIONS LIMITATION AND REPORTING
REQUIREMENT - Pursuant to 15A NCAC 2D .1100 "Control of Toxic Air Pollutants," and
in accordance with the approved application for an air toxic compliance demonstration, the
permit limits in the table below shall not be exceeded. The Permittee has submitted a toxic
air pollutant dispersion modeling analysis request dated November 18, 2020 for the facility's
toxic air pollutant emissions as listed in the below table. The modeling analysis was
reviewed and approved by the DAQ Air Quality Analysis Branch (AQAB) on November 18,
2020. Placement of the emission sources, configuration of the emission points, and operation
of the sources shall be in accordance with the submitted dispersion modeling analysis and
should reflect any changes from the original analysis submittal as outlined in the AQAB
review memo.
----_._._................._----.._-...........................__......__.................._......_..........,......._._..._..._.._......._.........._._......._...._..._.........._....................._._..... ... ....m........_......_......_........................._.._......w._..........._................
_...........
Affected Source(s) i Toxic Air Pollutant Emission Limit
Adhesive/Tape Line (EU-1) Toluene diisocyanate, 2,4- and 2,6- isomers 0.0336 lb/24-hr
(584-84-9, 91-08-7)
a. Restrictions - To ensure compliance with the above limits, the following restrictions
shall apply:
i. The TDI content of the crosslinker product used in the Adhesive/Tape Line
(EU-1) shall be less than 0.1%, by weight;
ii. The usage rate of the crosslinker product shall be less than 33.6 pounds per
day.
b. Reporting Requirements - For compliance purposes, within 30 days after each
calendar year quarter, regardless of the actual emissions, the following shall be
reported to the Regional Supervisor, DAQ:
i. The highest daily TDI emissions rate during the previous calendar year
quarter.
c. Recordkeeping Requirements—The Permittee shall:
i. Maintain daily records of any adhesive(s) containing TDI used [gallons] in
the Adhesive Tape Line;
ii. Maintain Safety Data Sheet(s) (SDS) or Certificate(s) of Analysis showing
the TDI content of the adhesive(s) used;

Permit No. 10670R00
Page 4
iii. Daily TDI emissions shall be recorded weekly in a logbook or using an
electronic data system. All records must be kept on site for a minimum of
three (3)years and made available to DAQ personnel upon request.
7. TOXIC AIR POLLUTANT EMISSIONS LIMITATION REQUIREMENT- Pursuant to
15A NCAC 2Q .0711 'Emission Rates Requiring a Permit," for each of the below listed
toxic air pollutants (TAPS),the Permittee has made a demonstration that facility-wide actual
emissions, where one or more emission release points are obstructed or non-vertically
oriented, do not exceed the Toxic Permit Emission Rates (TPERs) listed in 15A NCAC 2Q
.0711(a). The facility shall be operated and maintained in such a manner that emissions of
any listed TAPS from the facility, including fugitive emissions, will not exceed TPERs listed
in 15A NCAC 2Q .0711(a).
a. A permit to emit any of the below listed TAPS shall be required for this facility if
actual emissions from all sources will become greater than the corresponding
TPERs.
b. PRIOR to exceeding any of these listed TPERs, the Permittee shall be responsible
for obtaining a permit to emit TAPs and for demonstrating compliance with the
requirements of 15A NCAC 2D .1100 "Control of Toxic Air Pollutants".
c. In accordance with the approved application, the Permittee shall maintain records of
operational information demonstrating that the TAP emissions do not exceed the
TPERs as listed below:
Carcinogens Chronic Acute Systemic Acute
Pollutant E (lb/yr) nts Toxicants Irritants Toxica
(lb/day) (lb/hr) (lb/hr)
.......... ...... ....._............. .............. ...._... ....................... ....... . ... ... .... ............ ... .
MEK (methyl ethyl ketone, 78 22.4
2-butanone) (78-93-3)
B. GENERAL CONDITIONS AND LIMITATIONS
1. In accordance with G.S. 143-215.108(c)(1), TWO COPIES OF ALL DOCUMENTS,
REPORTS, TEST DATA, MONITORING DATA,NOTIFICATIONS, REQUESTS FOR
RENEWAL, AND ANY OTHER INFORMATION REQUIRED BY THIS PERMIT shall be
submitted to the:
Regional Supervisor
North Carolina Division of Air Quality
Winston-Salem Regional Office
450 West Hanes Mill Road
Suite 300
Winston-Salem, NC 27105
336-776-9800
For identification purposes, each submittal should include the facility name as listed on the
permit, the facility identification number, and the permit number.

Permit No. 10670R00
Page 5
2. RECORDS RETENTION REQUIREMENT - In accordance with 15A NCAC 2D .0605, any
records required by the conditions of this permit shall be kept on site and made available to DAQ
personnel for inspection upon request. These records shall be maintained in a form suitable and
readily available for expeditious inspection and review. These records must be kept on site for a
minimum of 2 years, unless another time period is otherwise specified.
3. ANNUAL FEE PAYMENT- Pursuant to 15A NCAC 2Q .0203(a), the Permittee shall pay the
annual permit fee within 30 days of being billed by the DAQ. Failure to pay the fee in a timely
manner will cause the DAQ to initiate action to revoke the permit.
4. EQUIPMENT RELOCATION - In accordance with 15A NCAC 2Q .0301, a new air permit shall
be obtained by the Permittee prior to establishing, building, erecting, using, or operating the
emission sources or air cleaning equipment at a site or location not specified in this permit.
5. REPORTING REQUIREMENT - In accordance with 15A NCAC 2Q .0309, any of the
following that would result in previously unpermitted, new, or increased emissions must be
reported to the Regional Supervisor, DAQ:
a. changes in the information submitted in the application regarding facility emissions;
b. changes that modify equipment or processes of existing permitted facilities; or
c. changes in the quantity or quality of materials processed.
If appropriate, modifications to the permit may then be made by the DAQ to reflect any
necessary changes in the permit conditions. In no case are any new or increased emissions
allowed that will cause a violation of the emission limitations specified herein.
6. In accordance with 15A NCAC 2Q .0309, this permit is subject to revocation or modification by
the DAQ upon a determination that infornation contained in the application or presented in the
support thereof is incorrect, conditions under which this permit was granted have changed, or
violations of conditions contained in this permit have occurred. In accordance with G.S. 143-
215.108(c)(1),the facility shall be properly operated and maintained at all times in a manner that
will effectuate an overall reduction in air pollution. Unless otherwise specified by this permit, no
emission source may be operated without the concurrent operation of its associated air cleaning
device(s) and appurtenances.
7. In accordance with G.S. 143-215.108(c)(1),this permit is nontransferable by the Permittee.
Future owners and operators must obtain a new air permit from the DAQ.
8. In accordance with G.S. 143-215.108(c)(1), this issuance of this permit in no way absolves the
Permittee of liability for any potential civil penalties which may be assessed for violations of
State law which have occurred prior to the effective date of this permit.
9. In accordance with G.S. 143-215.108(c)(1),this permit does not relieve the Permittee of the
responsibility of complying with all applicable requirements of any Federal, State, or Local
water quality or land quality control authority.
10. In accordance with 15A NCAC 2D .0605, reports on the operation and maintenance of the
facility shall be submitted by the Permittee to the Regional Supervisor, DAQ at such intervals

Permit No. 10670R00
Page 6
and in such form and detail as may be required by the DAQ. Information required in such reports
may include, but is not limited to,process weight rates, firing rates, hours of operation, and
preventive maintenance schedules.
11. A violation of any term or condition of this permit shall subject the Permittee to enforcement
pursuant to G.S. 143-215.114A, 143-215.11413, and 143-215.114C, including assessment of civil
and/or criminal penalties.
12. Pursuant to North Carolina General Statute 143-215.3(a)(2), no person shall refuse entry or
access to any authorized representative of the DAQ who requests entry or access for purposes of
inspection, and who presents appropriate credentials, nor shall any person obstruct, hamper, or
interfere with any such representative while in the process of carrying out his official duties.
Refusal of entry or access may constitute grounds for permit revocation and assessment of civil
penalties.
13. In accordance with G.S. 143-215.108(c)(1), this permit does not relieve the Permittee of the
responsibility of complying with any applicable Federal, State, or Local requirements governing
the handling, disposal, or incineration of hazardous, solid, or medical wastes, including the
Resource Conservation and Recovery Act (RCRA) administered by the Division of Waste
Management.
14. PERMIT RETENTION REQUIREMENT - In accordance with 15A NCAC 2Q .0110, the
Permittee shall retain a current copy of the air permit at the site. The Permittee must make
available to personnel of the DAQ, upon request, the current copy of the air permit for the site.
15. CLEAN AIR ACT SECTION 112(r) REQUIREMENTS - Pursuant to 15A NCAC 2D .2100
"Risk Management Program," if the Permittee is required to develop and register a risk
management plan pursuant to Section 112(r).of the Federal Clean Air Act, then the Permittee is
required to register this plan with the USEPA in accordance with 40 CFR Part 68.
16. PREVENTION OF ACCIDENTAL RELEASES - GENERAL DUTY - Pursuant to Title I Part
A Section 112(r)(1) of the Clean Air Act "Hazardous Air Pollutants - Prevention of Accidental
Releases - Purpose and General Duty," although a risk management plan may not be required, if
the Permittee produces,processes, handles,or stores any amount of a listed hazardous substance,
the Permittee has a general duty to take such steps as are necessary to prevent the accidental
release of such substance and to minimize the consequences of any release. This condition is
federally-enforceable only.
17. GENERAL EMISSIONS TESTING AND REPORTING REQUIREMENTS - If emissions
testing is required by this permit, or the DAQ, or if the Permittee submits emissions testing to the
DAQ in support of a permit application or to demonstrate compliance, the Permittee shall
perform such testing in accordance with 15A NCAC 2D .2600 and follow all DAQ procedures
including protocol approval, regional notification, report submittal, and test results approval.
Additionally, in accordance with 15A NCAC 2D .0605, the Permittee shall follow the procedures
for obtaining any required audit sample and reporting those results.

Permit No. 10670R00
Page 7
Permit issued this the 3 d of March, 2021.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
T. R y Stew Oisor
CP
Regional Su
By Authority of the Environmental Management Commission
Air Permit No. 10670R00

ATTACHMENT to Permit No. 10670R00, March 3, 2021
Insignificant/Exempt Activities
Source Exemption Source of Source of t
Regulation TAPS? Title V
Pollutants.
............................................................................................................. ............
I-X1, I-X2, I-X3, I-X4, I-X5, s
I-XS 1, I-XS2, I-CX 1 and I-XW 1 -
3
Nine (9) Extruders
I-PFl — 2Q .0102 (h)(5)
f
Natural Gas-fired Production Furnace l
(0.35 mmBtu/hr maximum heat rating), I Yes Yes
...__._....._._._...._.._.__..___,indirect-fired.._..__.
µ I-WHF1, I-WHF2, I-WHF3 and I-WHF4— 3
Four(4)Natural Gas-fired Warehouse Furnaces
used for comfort heating 2Q .0102 (g)(5)(A) ' !
(0.35 mmBtu/hr maximum heat rating, each),
indirect fired
1. Because an activity is exempted from being required to have a permit or permit modification
does not mean that the activity is exempted from an applicable requirement or that the owner
or operator of the source is exempted from demonstrating compliance with any applicable
requirement.
2. When applicable, emissions from stationary source activities identified above shall be
included in determining compliance with the permit requirements for toxic air pollutants
under 15A NCAC 2D .1100 "Control of Toxic Air Pollutants" or 2Q .0711 "Emission Rates
Requiring a Permit."
3. Sample permit conditions showing the regulatory requirements for exempt sources subject to
NESHAP,NSPS, and NCAC rules may be found here:
https://deg.nc. og v/agpermitconditions