AQ_F_0400061_20191016_PRMT_Permit

ROY COOPER T—°
Governor
MIC14AEL S.REGAN
MIC14AEL A. ABRACZINSKAS ti. ��..
NORTH CAPaLINA
Director Environmental Quality
October 16, 2019
Mr. Ted Niblock
Manager
Catawba Biogas, LLC
1213 Culbreth Drive
Suite 312
Wilmington,NC 28405
Subject: Air Permit No. 10593R00
Catawba Biogas, LLC
Lilesville, Anson County,North Carolina
Permit Class: Small
Facility ID# 0400061
Dear Mr. Niblock:
In accordance with your completed application received June 3, 2019, we are forwarding
herewith Permit No. 10593R00 to Catawba Biogas, LLC, Lilesville, Anson 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. 150B-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. 150B-23,
North Carolina Department of Environmental Quality I Division of Air Quality
Fayetteville Regional Office 1 225 Green Street,Suite 714 i Fayetteville,NC 28301-5094
910.433.3300 T 1 910.485.7467 F

Ted Niblock
October 16, 2019
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-
215.11413.
This permit shall be effective from October 16, 2019 until September 30, 2027, is
nontransferable to future owners and operators, and shall be subject to the conditions and limitations
as specified therein.
Changes have been made to the permit stipulations. 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 Jeffrey D. Cole at 910-433-3300.
Sincerely,
Heather Carter, Regional Supervisor
Division of Air Quality,NC DEQ
JDC
Enclosures
c: Fayetteville Regional Office

NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF AIR QUALITY
AIR PERMIT NO. 10593R00
Issue Date: October 16, 2019 Effective Date: October 16, 2019
Expiration Date: September 30, 2027 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,
Catawba Biogas,LLC
1133 Blewett Falls Rd.
Lilesville, Anson County, North Carolina
Permit Class: Small
Facility ID# 0400061
(the Pertnittee) is hereby authorized to construct and operate the air emissions sources and/or
air cleaning devices and appurtenances described below:
ittl$31011 i �+41L1illt E ii G }�$t81[�a #
. �l a tc 1`I t1A 4
ES-1 Natural gas-fired Boiler N/A NIA
(NSPS) � (19.02 mmBtuThr maximum heat input) �
I
Shrouded Biogas Flare
CD-1 (using natural gas for pilot flame with a 28.06
Biogas Production Equipment mmBtulhr maximum heat input)
ES-2 (consisting of three(3)identical 70,629 ft3
fermenters and two(2)identical and and
2.28 million-gallon anaerobic digesters)
Carbon Adsorber
CD-2 Hydrogen Sulfide Removal System
ES-3 Natural gas-fired Boiler
Biomass Liquefaction System NIA (ID No. ES-1)used as a thermal oxidizer
in accordance with the completed application 0400061.18A received June 3, 2019 including any
plans, specifications, previous applications, and other supporting data, all of which are filed with the
Department of Environmental Quality, Division of Air Quality (DAQ) and are incorporated as part
of this permit.

Permit No. 10593R00
Page 2
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 .0503, 2D .0515, 2D .0516, 2D .0521, 2D .0524 (40 CFR 60, Subpart DC), 2D
.0535, 2D .0540, 2D .0541, 2D .0611, 2D .1806 and 2Q .0304.
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 2026 calendar year.
3. PARTICULATE CONTROL REQUIREMENT - As required by 15A NCAC 2D .0503
"Particulates from Fuel Burning Indirect Heat Exchangers," particulate matter emissions
from the fuel burning indirect heat exchangers shall not exceed the allowable emission rates
listed below:
f vvna Wil
Natural gas-fired Boiler (19.02 mmBtulhr maximum heat input) 1 0.47
(ES-1)
4. PARTICULATE CONTROL REQUIREMENT - As required by 15A NCAC 2D .0515
"Particulates from Miscellaneous Industrial Processes," particulate matter emissions from
the emission sources shall not exceed allowable emission rates. The allowable emission rates
are, as defined in 15A NCAC 2D .0515, a function of the process weight rate and shall be
determined by the following equation(s), where P is the process throughput rate in tons per
hour (tonslhr) and E is the allowable emission rate in pounds per hour(lbs/hr).
E =4.10 * (P) 0 67 for P <= 30 tonslhr, or
E— 55 * (P) '-"- 40 for P >3 0 tons/hr
5. SULFUR DIOXIDE CONTROL REQUIREMENT - As required by 15A NCAC 2D .0516
"Sulfur Dioxide Emissions from Combustion Sources," sulfur dioxide emissions from
Natural gas-fired Boiler (ID No. ES-1) and Biogas Production Equipment (ID No. ES-2)
shall not exceed 2.3 pounds per million Btu heat input.

I�
Permit No. 10593R00
Page 3
6. 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.
7. 15A NCAC 2D .0524 "NEW SOURCE PERFORMANCE STANDARDS" - For Natural
gas-fired Boiler (ID No. ES-1),the Permittee shall comply with all applicable provisions,
including the notification, testing, reporting, recordkeeping, and monitoring requirements
contained in Environmental Management Commission Standard 15A NCAC 2D .0524
"New Source Performance Standards" (NSPS) as promulgated in 40 CFR 60, Subpart De,
including Subpart A "General Provisions."
a. NSPS Reporting Requirements - In addition to any other notification requirements to
the Environmental Protection Agency (EPA), the Permittee is required to NOTIFY
the Regional Supervisor, DAQ, in WRITING, of the following:
i. The actual date of initial start-up of an affected source, postmarked within
15 days after such date. If the affected source is permitted to burn multiple
fuels, then the actual date of start-up, for each fuel, must be submitted and
postmarked within 15 days after such date;
b. NSPS Recordkeeping, Requirements - In addition to any other recordkeeping
requirements of the EPA, the Permittee is required to maintain records as follows:
i. The amounts of each fuel combusted during each month; and
ii. All records required under this section shall be maintained for a period of two
years following the date of such record.

i
Permit No. 10593R00
Page 4
8. 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,
iii. 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.
9. 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
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).

Permit No. 10593R00
Page 5
- As required b 15A NCAC 2D .0611 emissions
10. BIOGAS FLARE REQUIREMENTS q y
shall be controlled as described in the permitted equipment list.
a. Inspection and Maintenance Requirements - To comply with the provision of this
permit and ensure that emissions do not exceed the regulatory limits,the Permittee
shall perform periodic inspections and maintenance (I&M) as recommended by the
manufacturer. In addition,the Permittee shall perform an annual inspection of the
pollution control device.
i. The flare shall be operated while the biogas is being vented to the
atmosphere;
ii. The Permittee shall ensure the flame is maintained when biogas is being
vented from the Biogas Production Equipment (ID No. ES-2), by:
A. a continuous flame detection system and regular inspections of the
flame detection system.
iii. The Permittee shall perform a daily visual inspection of the structural
integrity of the flare system, when it is operating.
b. Recordkeeping Requirements - The results of all inspections and any variance from
manufacturer's recommendations or from those given in this permit (when
applicable) shall be investigated with corrections made and dates of actions recorded
in a logbook. Records of all maintenance activities shall be recorded in the logbook.
The logbook (in written or electronic format) shall be kept on-site and made
available to DAQ personnel upon request.
11. CARBON ADSORBER REQUIREMENTS - As required by 15A NCAC 2D .0611,
emissions shall be controlled as described in the permitted equipment list.
a. Inspection and Maintenance Requirements - To comply with the provision of this
permit and ensure that emissions do not exceed the regulatory limits,the Permittee
shall perform periodic inspections and maintenance (I&M) as recommended by the
manufacturer. In addition, the Permittee shall perform an annual (for each 12 month
period following the initial inspection) inspection of each carbon adsorber system.
As a minimum, the I&M program and each annual inspection should include the
following:
i. Inspect and maintain the structural integrity of each carbon adsorber system
ii. Inspect and maintain the structural integrity of duct work and piping leading
to each carbon adsorber system.
b. RecordkeeDin2 Requirements - The results of all inspections and any variance from
manufacturer's recommendations shall be investigated with corrections made and
dates of actions recorded in a logbook. Records of all maintenance activities shall be
recorded in the logbook. The logbook (in written or electronic format) shall be kept
on-site and made available to DAQ personnel upon request.

i
Permit No. 10593R00
Page 6 j
12. LIMITATION TO AVOID 15A NCAC 02D .1806 - Pursuant to 15A NCAC 02D
1806(d)(11),to avoid the applicability of 15A NCAC 02D .1806, "Control and Prohibition
of Odorous Emissions," the Permittee shall implement the following management practices
for minimizing odor from poultry litter:
a. When poultry litter arrives on the facility's property, it shall be in adequately covered
trucks;
b. The Permittee shall utilize on-site fuel handling and management practices to
minimize emissions and spillage and improve combustion conditions of the poultry
litter. These practices shall include:
i. performing loading and off-loading procedures inside a poultry litter storage
area in an expeditious manner;
ii. reasonably utilizing the "first in, first out" (FIFO) method for processing and
using poultry litter;
iii. immediately transporting loaded trucks when transferring poultry litter from
storage to fuel processing; and
iv. not storing any poultry litter on site for more than 90 days.
13. ZONING SPECIFIC CONDITION - In accordance with 15A NCAC 2Q .0304, prior to
construction or operation of the facility under this permit, the Permittee shall comply with
all lawfully adopted local ordinances that apply to the facility at the time of construction or
operation of the facility. The local zoning authority shall have the responsibility of enforcing
all lawfully adopted local zoning or subdivision ordinances.

Permit No. 10593R00
Page 7
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
Fayetteville Regional Office
Systel Building
225 Green Street, Suite 714
Fayetteville,NC 28301-5094
910-433-3300
For identification purposes, each submittal should include the facility name as listed on the
permit, the facility identification number, and the permit number.
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.

i
Permit No. 10593R00
Page 8
6. In accordance with 15A NCAC 2Q .0309, this permit is subject to revocation or
modification by the DAQ upon a determination that information 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 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.

Permit No. 10593R00
Page 9 ,
- 2D .21 00
15. CLEAN AIR ACT SECTION 112 r REQUIREMENTS Pursuant to 15A NCAC
"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 issued this the 16" of October, 2019.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Heather Carter
Regional Supervisor
By Authority of the Environmental Management Commission
Air Permit No. 10593R00

f
i
ATTACHMENT to Permit No. 10593R00, October 16, 2019
Insignificant/Exempt Activities
� IES-1
Two Lean Ammonia Water Pits 2Q .0102 (g)(14)(B) Yes No
l (each 3,770 ft3 in volume)
IES-2
'Rich Ammonia Water Tank equipped 2Q .0102 (g)(4) Yes No
with Activated Carbon Filter
l. 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:
htt s:l/de .nc.govla ermitconditions