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Chemouml Fayetteville Works
22828 NC Highway 87 W
Fayetteville,NC 28306
-14
CERTIFIED MAIL ARTICLE NUMBER 7017 1450 0002 3902 3924-
RETURN RECEIPT REQUESTED (ZA-� A e.9-
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January 26, 2022
Ms. Heather Carter RECEIVED
NCDEQ-Division of Air Quality
225 Green Street- Suite 714 MAR - 2 2022
Fayetteville, NC 28301
DEQ-FAYETTEVILLE RENONAL OFFICE
SUBJECT: Chemours Company-Fayetteville Works
Title V Permit Semiannual Report - Second Half 2021
Air Permit No. 03735T48
Facility ID No. 0900009
Dear Ms. Carter,
Attached is the semiannual report for the period from July 1, 2021 to December 31, 2021. This
report also serves as the 41h quarter TAP report for 2021.
Enclosed you will find the required photocopy of this report.
If you have any questions, please feel free to contact me at [phone].
Sincerely,
Christel Compton
Program Manager
Attachment
Enclosure

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Chemours Company—Fayetteville Works Semiannual Report—2nd Half 2021
Air Permit No. 03 73 5T48 Page 1
NATURAL GAS and FUEL OIL-FIRED BOILERS ID NOS. PS-A, PS-B, and PS-C
15A NCAC 02D .0524: New Source Performance Standards (40 CFR 60, Subpart Dc) —
(Emission Source ID No. PS-C)
Pursuant to Section 2.1(A)(4)(r) of the subject Title V permit, a summary report that includes fuel
supplier certifications for distillate fuel oil, a signed, certified statement that the records of fuel
supplier certifications represent all of the fuel fired at Boiler PS-C,and records from any conducted
performance tests. Construction of Boiler PS-C has not commenced and hence that boiler does
not exist. Therefore, the monitoring, recordkeeping, and reporting requirements of Section
2.1(A)(4) did not apply during the reporting period.
15A NCAC 2Q. 0317: Avoidance Conditions for 15A NCAC 2D. 0530: Prevention of
Significant Deterioration—(Emission Source ID No. PS-B)
As specified in Section 2.1(A)(5)(f) of the subject Title V permit, a summary report of the
monitoring activities for the six-month period between July and Dec of the reporting period is
herein submitted. This report contains the following:
(i) The monthly nitrogen oxide and sulfur dioxide emissions from the affected boiler (ID No.
PS-B) for the previous 17 months (see Table 1 in Attachment D).
(ii) The 12-month rolling nitrogen oxide and sulfur dioxide emissions for each 12-month period
ending during the reporting period (see Table 1 in Attachment D). The emissions of these
two pollutants per consecutive 12-month period during the reporting period have remained
below the respective PSD avoidance limits specified in Section 2.1(A)(5)(a) of the subject
Title V permit.
(iii) There were no deviations from the requirements of this permit during the reporting period.
15A NCAC 2D .1111: Maximum Achievable Control Technology (Emission Sources PS-A,
PS-B and PS-C)
As specified in Section 2.1(a)(7)(q) of the subject Title V permit, a compliance report must be
submitted to DAQ every five years. The first report shall cover the period beginning May 19,
2019 and ending December 31 within five years of May 19, 2019.
The first report under this provision will be due January 30, 2024.
FPS/IXM PROCESS AREA
15 NCAC 02Q .05086): Alternative Operating Scenarios
A notification that Chemours permanently switched to the Alternative Operating Scenario was
submitted to DAQ on December 31, 2019 (Section 2.1(B)(1)(e) for 03735T48).

Chemours Company—Fayetteville Works Semiannual Report—2nd Half 2021
Air Permit No. 03735T48 Page 2
15A NCAC 2D .0515: Particulates from Miscellaneous Industrial Processes — (Emission
Sources ID No. NS-I and NS-D-2)
As specified in Section 2.1(B)(2)(d) of the subject Title V permit,the required summary report of
monitoring and recordkeeping activities for the six-month period between July and Dec of the
reporting period is satisfied with this paragraph. During the reporting period, as required by
Section 2.1(B)(2)(c), production records were maintained and are available to a DAQ authorized
representative upon request. During the reporting period, no deviations from the requirements of
the subject Title V permit were identified.
15A NCAC 02D .0516: Sulfur Dioxide Emissions from Combustion Sources (Emission
Source ID No. NCD-Q1)
There are no reporting requirement specified under 2.1(B)(3)(c) for sulfur dioxide emissions
from NCD-Q 1.
15A NCAC 02D .0521: Control of Visible Emissions (Emissions Sources ID No.NS-I,NS-D-
2 and NCD-Q2)
There are no reporting requirement specified under 2.1(B)(4)(c) for the control of visible
emissions from NS-I,NS-D-2 and NCD-Q2.
15A NCAC 2Q. 0317: Avoidance Conditions for 15A NCAC 2D. 0530: Prevention of
Significant Deterioration—(Emission Source ID No. NS-B)
i
As specified in Section 2.1(B)(5)(e) of the subject Title V permit, a semi-annual summary report
of monitoring activities for the six-month period between July and Dec of the reporting period is
herein submitted (see Table 2 in Attachment D). This report shows the monthly VOC emissions
from the Vinyl Ethers North Process (ID No. NS-B) for the previous 17 calendar months and
shows the 12-month rolling VOC emissions for each 12-month period ending during the reporting
period. No deviations from the requirements of the subject Title V permit were identified during
the reporting period from the Vinyl Ethers North Process.
15A NCAC 2Q. 0317: Avoidance Conditions for 15A NCAC 2D. 0530: Prevention of
Significant Deterioration—(Emission Source ID Nos. NS-G1 and NS-G2)
As specified in Section 2.1(B)(6)(e) of the subject Title V permit, a semi-annual summary report
of monitoring and recordkeeping activities for the six-month period between July and Dec of the
reporting period is herein submitted(see Table 2 in Attachment D). The report shows the monthly
VOC emissions from the Resins Process(ID Nos.NS-G 1 and NS-G2)for the previous 17 calendar
months, and shows the 12-month rolling VOC emissions for each 12-month period ending during
the reporting period. No deviations from the requirements of the subject Title V permit were
identified during the reporting period from the Resins Process.

Chemours Company—Fayetteville Works Semiannual Report—2nd Half 2021
Air Permit No. 03735T48 Page 3
15A NCAC 2Q. 0317: Avoidance Conditions for 15A NCAC 2D. 0530: Prevention of
Significant Deterioration—(Emission Source ID No. NS-A)
As specified in Section 2.1(B)(7)(e) of the subject Title V permit, a semi-annual summary report
of monitoring and recordkeeping activities for the six-month period between July and Dec of the
reporting period is herein submitted(see Table 2 in Attachment D). The report shows the monthly
VOC emissions from the HFPO Process (ID No. NS-A) for the previous 17 calendar months, and
shows the 12-month rolling VOC emissions for each 12-month period ending during the reporting
period. No deviations from the requirements of the subject Title V permit were identified during
the reporting period from the HFPO Process.
15A NCAC 2Q. 0317: Avoidance Conditions for 15A NCAC 2D. 0530: Prevention of
Significant Deterioration—(Emission Source ID No. NS-N)
As specified in Section 2.1(B)(8)(e) of the subject Title V permit, a semi-annual summary report
of monitoring and recordkeeping activities for the six-month period between July and Dec of the
reporting period is herein submitted(see Table 2 in Attachment D). The report shows the monthly
VOC emissions from the HFPO Product Container Decontamination Process (ID No. NS-N) for
the previous 17 calendar months, and shows the 12-month rolling VOC emissions for each 12-
month period ending during the reporting period. No deviations from the requirements of the
subject Title V permit were identified during the reporting period from the HFPO Product
Container Decontamination Process.
15A NCAC 02D .0530(u): Use of Projected Actual Emissions to Avoid Applicability of
Requirements of PSD (Emission Source ID No. NS-I)
As specified in Section 2.1(B)(9)(b)(ii), the Permittee shall submit a report to the director within
60 days after the end of each calendar year during which these records were generated.
The required years of recordkeeping are 2018 — 2028. This report was submitted under separate
cover in January of this year.
15A NCAC 2D .1111: Maximum Achievable Control Technology (MACT), 40 CFR 63,
Subpart FFFF: NESHAP for Miscellaneous Organic Chemical Manufacturing (MON)
(Emission Sources ID No. NS-A,NS-B,NS-C, NS-G-1 and NS-G-2)
As specified in Section 2.1(B)(10)(nn) of the subject Title V permit, a semi-annual compliance
report of monitoring and recordkeeping activities for the six-month period between July and Dec
of the reporting period is herein submitted(see Attachment A).
ALTERNATIVE OPERATING SCENARIO—STATE-ONLY REQUIREMENT
15A NCAC 02Q .0519(a)(7) and Consent Order(Emission Sources ID Nos.NS-A,NS-B,NS-
C, NS-D-1,NS-E, NS-F, NS-G-1,NS-K, NS-M, NS-N, NS-O and NS-P to Control Device ID
Nos. NCD-Q1 and NCD-Q2)

Chemours Company—Fayetteville Works Semiannual Report—2nd Half 2021
Air Permit No. 03735T48 Page 4
As specified in Section 2.1(B)(1 1)(n), the Permittee shall submit a quarterly summary report of
monitoring and recordkeeping activities specified in Section 2.1(B)(11)(f)through(B)(11)(n). The
Thermal Oxidizer system began normal operations on December 31, 2019. Submission of the
quarterly reports was completed during the reporting period under separate cover.
TEMPORARY BOILER(ID No. PS-Temp)
15A NCAC 2Q. 0317: Avoidance Conditions for 15A NCAC 2D. 0530: Prevention Of
Significant Deterioration
The temporary boiler was not present at this site during the six-month period between July and
Dec of the reporting period. As specified in Section 2.1(E)(4)(e) of the subject Title V permit, a
semi-annual summary report of monitoring and recordkeeping activities for the six-month period
between July and Dec of the reporting period is herein submitted (see Table 3 in Attachment D).
The report shows the monthly S02 emissions from the boiler (ID No. PS-Temp) for the previous
17 months and shows the total S02 emissions from the boiler for each 12-month period ending
during the six-month reporting period. No deviations from these requirements of the subject Title
V permit were identified during the reporting period.
LIME SILO AND LIME SLAKER(ID Nos. NS-R1 and NS-R2)
15A NCAC 02D .0515: Particulates from Miscellaneous Industrial Processes (Emission
Sources ID Nos. NS-R1 and NS-R2)
As specified in 2.1(F)(1)(h), the Permittee shall submit a semiannual summary report of the
monitoring and recordkeeping activities in Section 2.1(F)(1)(c)through(F)(1)(f). The information
is detailed in the following subsections.
Section 2.1(F)(1)(c)
Particulate matter emissions from the Lime Slaker (ID No. NS-R2) shall be controlled by the
Wet Particulate Scrubber(ID No. NCD R2). The permittee shall install, operate, and maintain
a wet scrubbing liquid flowmeter on each scrubber. To ensure compliance and the effective
operation of the scrubbers, the permittee shall monitor and record, once per day, scrubbing
liquid flow rate.
The Digital Process Control System(aka: DCS/CMS) provides continuous monitoring of the Wet
Particulate Scrubber flow meter readings. The data historian application (IP21) collects real-time
process data from the DCS to provide constant monitoring and supervision of the scrubbing liquid
flow rate.
The permittee shall be allowed three (3) days of absent observations per semi-annual period. If
the emission source(s) is not operating, a record of this fact along with the corresponding date
and time shall substitute for the daily observation.
No absent observations occurred during the reporting period when the process was operating.

Chemours Company—Fayetteville Works Semiannual Report—2nd Half 2021
Air Permit No. 03735T48 Page 5
To ensure quality, the flow rate meters shall be calibrated annually.
The flow rate meters were calibrated this reporting period during the annual site-wide shutdown.
The scrubber shall be operated to ensure the scrubbing liquid flow rate is greater than 0.84
gallons per minute.
During the reporting period, there were no deviations from this requirement.
Section 2.1(F)(1)(d)
If the scrubber liquid flow rate readings recorded as required, are observed to be below the
minimum rate specified in Section 2.1(F)(1)(c), the permittee shall inspect the scrubber(s)for
malfunctions and clean or repair, as necessary.
During this reporting period, the scrubbing liquid flow rate readings were observed to be above
the minimum rate of 0.84 gallons per minute.
Section 2.1(F)(1)(e)
Particulate matter emissions from the Lime Silo (ID No. AS-RI)shall be controlled by the Bag
Filter (ID No. NSD RI). To ensure compliance, the permittee shall perform inspections and
maintenance as recommended by the manufacturer. In addition to the manufacturer's
inspection and maintenance recommendations, or if there are no manufacturer's inspection
and maintenance recommendations, as a minimum, the inspection and maintenance
requirement shall include the following:
Section 2.1(F)(1)(e)(i): a monthly visual inspection of the system ductwork and material
collection unit for leaks;
The Lime Silo, Bag Filter, and system ductwork are inspected at least monthly for any evidence
of particulate matter emissions. For the reporting period, there were no instances of any visible
leaks, nor any evidence of particulate matter emissions. A written record of all required
inspections is maintained onsite and available upon request. Any manufacturer recommended
maintenance has been included in the site maintenance plan along with a preventive maintenance
schedule.
Section 2.1(F)(1)(e)(ii): an annual(for each 12-month period following the initial inspection)
internal inspection of the bag filter's structural integrity.
The required internal inspection for the structural integrity of the bag filter is conducted during the
annual site-wide shut down scheduled each October and whenever the Technical Team determines
it is necessary, due to the specific nature of any issue. During this reporting period, an inspection
of the structural integrity of the bag filter was conducted and no issues were noted.
Section 2.1(F)(1)(f)
The results of inspection and maintenance activities in Section 2.1(F)(1)(c) through 2.1
(F)(1)(e), shall be maintained in a logbook (written or electronic format) on-site and made
available to an authorized representative of DAQ upon request.

Chemours Company—Fayetteville Works Semiannual Report—2nd Half 2021
Air Permit No. 03735T48 Page 6
The logbook shall record the following:
Section 2.1(F)(1)(f)(i): the date and time of each recorded action
Section 2.1(F)(1)(1)(ii): the results of each inspection;
Section 2.1(F)(1)(f)(iii): the causes for any variance from the prescribed operating range for
the scrubber(s);
Section 2.1(F)(1)09(iv): corrective actions taken.
Records of all inspections and maintenance conducted on the Lime Silo, Lime Slaker, Bag Filter,
and ductwork, from the time of commissioning and startup to the present, are maintained onsite
and available upon request.
15A NCAC 02D .0521: Particulates from Miscellaneous Industrial Processes (Emission
Sources ID Nos. NS-R1 and NS-R2)
As specified in 2.1(F)(2)(e), the Permittee shall submit a semiannual summary report of the
monitoring and recordkeeping activities in Section 2.1(F)(2)(c)and(F)(2)(d). During the reporting
period, Chemours conducted visible emission observations once per week on the Lime Silo and
Slaker(ID Nos. NS-R1 and NS-R2). There were no above normal observations noted during this
reporting period. Records of visible emission observations are maintained onsite and available
upon request.
BOILERS (ID Nos. PS-A,PS-B, PS-C, and PS-Temp)
15A NCAC 2Q. 0317: Avoidance Conditions for 15A NCAC 2D. 0530: Prevention Of
Significant Deterioration
As specified in Section 2.2(A)(1)(e) of the subject Title V permit, a summary report of monitoring
activities for the six-month period between July and Dec of the reporting period is herein
submitted. There were no instances of deviation during the reporting period. This report contains
the following information(see Table 4 in Attachment D):
(i) The monthly S02 emissions from two affected boilers for the previous 17 calendar months
(ii) The 12-month rolling S02 emissions for each 12-month period ending during the reporting
period.
FACILITY-WIDE
15A NCAC 02D .1100: Toxic Air Pollutant Emissions Limitations and Requirements

Chemours Company—Fayetteville Works Semiannual Report—2nd Half 2021
Air Permit No. 03735T48 Page 7
As specified in Section 2.2(B)(1)(c) and Section 2.2(B)(2)(e) of the subject Title V permit, a
summary report of the emissions of the North Carolina Toxic Air Pollutants for the three-month
period of October through December of the reporting period is herein submitted. This report
contains the following:
(i) Any and all exceedances of applicable toxic air pollutant emission limits during the previous
calendar year quarter. There were no exceedances of applicable toxic air pollutant emission
limits during the fourth quarter of 2021.
(h) The maximum pounds per 1-hour emission rate at any time during the previous calendar
year quarter for all applicable toxic air pollutants that have a listed "pounds per hour"
emission rate. See Table 5 in Attachment D.
(iii) The maximum pounds per 24-hour emission rate at any time during the previous calendar
year quarter for all applicable toxic air pollutants that have a listed "pounds per day"
emission rate. See Table 5 in Attachment D.
(iv) The yearly emission rate for the 12-month period ending with the previous calendar year
quarter for all applicable toxic air pollutants which have a listed"pounds per year"emission
rate. See Table 5 in Attachment D.
40 CFR Part 68 "ACCIDENTAL RELEASE PREVENTION REQUIREMENTS: RISK
MANAGEMENT PROGRAMS UNDER THE CLEAN AIR ACT, SECTION 112(r)"
As specified in Section 2.2(B)(3)(b) and (c) the permittee must submit a Risk Management Plan
(RMP) to the EPA pursuant to 40 CFR Part 68.150. An RMP report was not required to be
submitted during the reporting period.
15A NCAC 02Q. 0519(a)(7) and Consent Order — STATE ENFORCEABLE ONLY
(Emission Sources ID No. ACD-A2 and NCD-Q3)
As specified in Section 2.2(D)(1)(m),the permittee shall submit a quarterly summary report of the
monitoring and recordkeeping activities specified in Section 2.2(D)(1). These reports have been
submitted as required under separate cover.

Chemours Company—Fayetteville Works Semiannual Report—2nd Half 2021
Air Permit No. 03 73 5T48 Page 8
ATTACHMENT A
Miscellaneous Organic Chemical Manufacturing NESHAP (MON)
40 CFR Part 63 Subpart FFFF
Title V Air Permit Section 2.1(B)(10)
Semi-Annual Compliance Report
As specified in Section 2.1(13)(10)(nn) of the subject Title V permit, a semi-annual compliance
report of monitoring and recordkeeping activities for the six-month period between July and
December of the reporting period is herein submitted. This report contains the following
information as specified by Section 2.1(C)(8)(oo):
Section 2.1(B)(10)(nn)(i) Company name and address.
Chemours Company—Fayetteville Works
22828 NC Hwy 87 W
Fayetteville,NC 28306-7332
Section 2.1(B)(10)(nn)(ii) Statement by a responsible official with that official's name, title, and
signature, certifying the accuracy of the content of the report.
See Attachment B for this certification statement.
Section 2.1(B)(10)(nn)(iii) Date of report and beginning and ending dates of the reporting period.
The date of this report is January 26, 2022. The reporting period of this report is from
July 1, 2021 through December 31, 2021.
Section 2.1(B)(10)(nn)(iv) If there are no periods of noncompliance from any emission limit,
operating limit or work practice standard specified in Section 2.1(13)(10), include a statement that
there were no periods of noncompliance from the emission limits, operating limits, or work
practice standards during the reporting period.
There were no periods of noncompliance from operating limits during the reporting period.
Section 2.1(B)(10)(nn)(v) For each period of noncompliance from an emission limit, operating
limit, and work practice standard, include the following information: (A)the total operating time
of the affected source during the reporting period; and (B) information on the number, duration,
and cause of noncompliance (including unknown cause, if applicable), as applicable, and the
corrective action taken.
There were no periods of noncompliance from the emission limits, operating limits or work
practice standards during the reporting period.

Chemours Company—Fayetteville Works Semiannual Report—2nd Half 2021
Air Permit No. 03735T48 Page 9
ATTACHMENT A
Miscellaneous Organic Chemical Manufacturing NESHAP (MON)
40 CFR Part 63 Subpart FFFF
Title V Air Permit Section 2.1(B)(10)
Semi-Annual Compliance Report
Section 2.1(13)(10)(nn)(vi) Identify each new operating scenario which has been operated since
the time period covered by the last compliance report and has not been submitted in the previous
compliance report. For each new operating scenario, the Permittee shall provide verification that
the operating conditions for any associated control or treatment device have not been exceeded
and that any required calculations and engineering analyses have been performed. A revised
operating scenario for an existing process is considered to be a new operating scenario.
There were no new operating scenarios under 40 CFR Part 63 Subpart FFFF during the
reporting period.
Section 2.1(13)(10)(nn)(vii) For the equipment listed below, report in a summary format by
equipment type, the number of components for which leaks were detected and for valves, pumps
and connectors show the percent leakers, and the total number of components monitored. Also
include the number of leaking components that were not repaired as required according to Section
2.1(B)(1 0)(bb)through (B)(10)(cc), above, and for valves and connectors, identify the number of
components that are determined to be non-repairable as described in 40 CFR 63.1025(c)(3).
(A) Valves in gas and vapor service and in light liquid service;
(B) Pumps in light liquid service;
(C) Connectors in gas and vapor service and in light liquid service; and
(D) Agitators in gas and vapor service and in light liquid service.
See Attachment C for this information in the required format. Note the agitator in VE-North
was not monitored in October because the process was down for the annual shutdown. There
were connectors added and some deleted in this reporting period in VE-North, VE-South and
Polymers. All were monitored and are included in Attachment C reports.
Note that the facility reevaluated pumps in the four process areas during the previous reporting
period and determined that the pumps are not equipped with external shafts. In accordance
with 40 CFR 63.1026(e)(2), any pump that is designed with no externally actuated shaft
penetrating the pump housing is exempt from the monitoring requirements; therefore,
Chemours will no longer be conducting monthly monitoring of the pumps in light liquid
service.

Chemours Company—Fayetteville Works Semiannual Report—2nd Half 2021
Air Permit No. 03735T48 Page 10
ATTACHMENT A
Miscellaneous Organic Chemical Manufacturing NESHAP (MON)
40 CFR Part 63 Subpart FFFF
Title V Air Permit Section 2.1(B)(10)
Semi-Annual Compliance Report
Section 2.1(13)(10)(nn)(viii) Where any delay of repair for leaks is utilized, report that delay of
repair has occurred and report the number of instances of delay of repair under Section
2.1(B)(10)(cc), above.
During the reporting period, no delay of repair for leaks has occurred.
Section 2.1(B)(10)(nn)(ix) For pressure relief devices, report the results of all leak monitoring to
show compliance conducted within the semiannual reporting period.
During the reporting period, no pressure relief device leaks were found.
Section 2.1(13)(10)(nn)(x) Report, if applicable, the initiation of a monthly leak monitoring
program for valves.
During the reporting period,there was no initiation of a monthly leak monitoring program for
valves.
Section 2.1(B)(10)(nn)(xi) For each affected heat exchanger system for which the Permittee
invokes the delay of repair, include the following information: (A) the presence of the leak and
the date that the leak was detected; (B) whether or not the leak has been repaired; (C) the
reason(s) for delay of repair and any supporting emission estimates; (D) if the leak is repaired,
the owner or operator shall report the date the leak was successfully repaired; and (E) if the leak
remains unrepaired,the expected date of repair.
During the reporting period, no heat exchanger system leaks were found.

Chemours Company—Fayetteville Works Semiannual Report—2nd Half 2021
Air Permit No. 03735T48 Page 11
ATTACHMENT B
Miscellaneous Organic Chemical Manufacturing NESHAP (MON)
40 CFR Part 63 Subpart FFFF
Title V Air Permit Section 2.1(B)(10)
Semi-Annual Compliance Report
Reporting Period from July 1, 2021 through December 31, 2021
Certification of Report Accuracy
As required by 40 CFR 63.2520(e)(2), this document is the statement by a responsible official
certifying the accuracy of the content of the subject MON compliance report.
By my signature below, I certify under penalty of law that I have personally examined and am
familiar with the information submitted in this document and all attachments and that, based on
my inquiry of those individuals immediately responsible for obtaining the information, I believe
that the information is accurate. I am aware that there are significant penalties for submitting false
information, including the possibility of fine and imprisonment.
January 26, 2022
Dawn M Hughes Date
Plant Manager

Chemours Company—Fayetteville Works Semiannual Report—2nd Half 2021
Air Permit No. 03735T48 Page 12
ATTACHMENT C
Miscellaneous Organic Chemical Manufacturing NESHAP (MON)
40 CFR Part 63 Subpart FFFF
Title V Air Permit Section 2.1(B)(10)
Semi-Annual Compliance Report
Periodic Monitoring Summary Report Parameters
Report:R807 � ,i.�.� M01V-W
Report Date: 1/5/2022 10:57:55AM Report from: 2021-7-1 00 To 2021-12 1
Compliance Group:
P P
HFPO Percent Late Non
Leaking Inspected Leaking Repairs Repairable
VALVES AUGUST 0 172 0.00 0 0
NUM413ER 1 172 0.58 0 0

Chemours Company—Fayetteville Works Semiannual Report—2nd Half 2021
Air Permit No. 03735T48 Page 13
ATTACHMENT C
Miscellaneous Organic Chemical Manufacturing NESHAP (MON)
40 CFR Part 63 Subpart FFFF
Title V Air Permit Section 2.1(B)(10)
Semi-Annual Compliance Report
Periodic Monitoring Summary- Report Parameters
Report:R807 a MON-UU
Report Date- 1/5/2022 10:57:56A2vl Report from: 20-21-7-1 00 To 2021-12-31
Comphance Group:
POLYN ERS Percent Late :.Von
Leaking IusQected Leaking Repairs Repairable
VALVES AUGUST 0 64 0.00 0 0
NOVEMBER 0 64 0.00 0 0
CONNECTORS DECEMBER 0 1 0.00 0 0

Chemours Company—Fayetteville Works Semiannual Report—2nd Half 2021
Air Permit No. 03735T48 Page 14
ATTACHMENT C
Miscellaneous Organic Chemical Manufacturing NESHAP (MON)
40 CFR Part 63 Subpart FFFF
Title V Air Permit Section 2.1(B)(10)
Semi-Annual Compliance Report
Periodic Monitoring Summate Report Paraineters
Report:R807 MON-UU
Report Date: 1/5Q022 10:57:56AM Report from: 2021-7-100 To 2021-12-31
Compliance Group:
IT'NORTH Percent Late 'Non
Leaking Inspected Leaking Repairs Repairable
VALVES AUGUST 0 212 0.00 0 0
NOVEMBER 0 219 0.00 0 0
AGITATORS JC,'LY 0 1 0.00 0 0
AUGUST 0 1 0.00 0 0
SEPTEN41BER 0 1 0.00 0 0
NO EMBER 0 1 0.00 0 0
DECENMER 0 1 0.00 0 0
CONNECTORS NOV EMBER 0 1 S 0.00 0 0

Chemours Company—Fayetteville Works Semiannual Report—2nd Half 2021
Air Permit No. 03735T48 Page 15
ATTACHMENT C
Miscellaneous Organic Chemical Manufacturing NESHAP (MON)
40 CFR Part 63 Subpart FFFF
Title V Air Permit Section 2.1(B)(10)
Semi-Annual Compliance Report
Periodic Monitoring Summary Report Parameters
Report_R807 MON-UU
Report Date: IISP-022 10:57:56AM ��...., Report from: 2021-7-1 00 To 2021-12-31
Compliance Group:
VE SOUTH Percent Late Non
Leaking Inspected Leaking Repairs Repairable
VADVES AUGUST 1 208 0.48 0 0
NOVEMBER 0 216 0.00 0 0
CONNECTORS NOVEMBER 0 22 0.00 0 0

Chemours Company-Fayetteville Works Semiannual Report-2nd Half 2021
Air Permit No. 03735T48
ATTACHMENT D
Emission Summary Tables
TABLE 1: PSD AVOIDANCE CONDITION: BOILER NO.2-NITROGEN OXIDE AND SULFUR DIOXIDE EMISSIONS SUMMARY
EMISSION SOURCE ID NO.PS-B
NO.,Limit=40 TPY,-SO2 Limit=40 TPY
Sulfur Concentration Fuel Consumption Nitrogen Oxides(NO,) Sulfur Dioxide(SO2)
#2 Fuel Oil #2 Fuel OR Natural Gas Monthly 12-Month Monthly 12-Month
Month Quarter ("�o) (M gal) (mmsco Emissions Summation Emissions Summation
(Tons) (Tons) (Tons) (Tons)
Jul-20 n/a 0.000 21.120 1.056 0.006
Aug-20 3rd 2020 n/a 0.000 0.040 0.002 0.000
Sep-20 n/a 0.000 1.390 0.070 0.000
Oct-20 n/a 0.000 16.580 0.829 0.005
Nov-20 4th 2020 n/a 0.000 0.040 0.002 0.000
Dec-20 n/a 0.000 17.630 0.882 0.005
Jan-21 n/a 0.000 16.520 0.826 0.005
Feb-21 1 st 2021 n/a 0.000 12.190 0.610 0.004
Mar-21 n/a 0.000 0.040 0.002 0.000
Apr-21 n/a 0.000 0.170 0.009 0.000
May-21 2nd 2021 n/a 0.000 11.770 0.589 0.004
Jun 21 n/a 0.000 35.300 1.765 6.640 0.011 0.040
Jul-21 n/a 0.000 32.910 1.646 7.229 0.010 0.043
Aug-21 3rd 2021 n/a 0.000 30.790 1.540 8.767 0.009 0.053
Sep-21 n/a 0.000 30.240 1.512 10.209 0.009 0.061
Oct-21 n/a 0.000 18.920 0.946 10.326 0.006 0.062
Nov-21 4th 2021 n/a 0.000 29.260 1.463 11.787 0.009 0.071
Dec-21 n/a 0.000 21.660 1.083 11.989 0.006 0.072

Chemours Company-Fayetteville Works Semiannual Report-2nd Half 2021
Air Permit No. 03735T48
ATTACHMENT D
Emission Summary Tables
TABLE 2: PSD AVOIDANCE CONDITIONS: VOC EMISSIONS SUMMARY
EMISSION SOURCE ID NO.NS-A,NS-B,NS-GI,and NS-N
Limits Included Below for Each Process Area
HFPO Vinyl Ethers North NaSon®Resins HFPO Container
ID No.NS-A ID No.NS-B ID No.NS-G1&G2 Decontamination
(Limit=85.3 TPY) (Limit=68.9 TPY) (Limit=40 TPY) ID No.NS-N
(Limit=40 TPY)
Monthly 12-Month Monthly 12-Month Monthly 12-Month Monthly 12-Month
Month Quarter Emissions Summation Emissions Summation Emissions Summation Emissions Summation
(Tons) (Tons) (Tons) (Tons) (Tons) (Tons) (Tons) (Tons)
Jul-20 0.134 0.063 0.184 0.000
Aug 20 3rd 2020 0.151 0.098 0.251 0.000
Sep-20 0.162 0.103 0.216 0.000
Oct-20 0.132 0.000 0.000 0.000
Nov 20 4th2020 0.138 0.088 0.122 0.000
Dec-20 0.134 0.116 0.193 0.000
Jan-21 0.155 0.155 0.188 0.000
Feb-21 1st 2021 0.136 0.075 0.161 0.000
Mar-21 0.136 0.116 0.238 0.000
Apr-21 0.146 0.130 0.274 0.001
May-21 2nd 2021 0.137 0.087 0.262 0.000
Jun-21 0.134 1.694 0.102 1.129 0.266 2.354 0.001 0.002
Jul-21 0.134 1.694 0.129 1.196 0.261 2.431 0.000 0.002
Aug-21 3rd 2021 0.158 1.700 0.120 1.218 0.283 2.462 0.000 0.002
Sep-21 0.144 1.682 0.079 1.194 0.188 2.434 0.000 0.002
Oct-21 0.150 1.699 0.024 1.218 0.091 2.524 0.000 0.003
Nov-21 4th 2021 r 0.144 1.705 0.100 1.230 0.197 2.599 0.000 0.003
Dec-21 1 0.134 1.705 0.176 1.291 0.209 2.615 0.000 0.003

Chemours Company-Fayetteville Works Semiannual Report-2nd Half 2021
Air Permit No. 03 73 5T48
ATTACHMENT D
Emission Summary Tables
TABLE 3: PSD AVOIDANCE CONDITION: RENTAL BOILER-SULFUR DIOXIDE EMISSIONS SUMMARY
EMISSION SOURCE ID NO.PS-TEMP
SO2 Limit 40 TPY
Sulfur
Fuel Consumption Sulfur Dioxide (SO2)
Concentration
#2 Fuel Oil #2 Fuel Oil Natural Gas Monthly 12-Month
Month Quarter (%) (M gal) (mmscf) Emissions Summation
(Tons) (Tons)
Jul-20 n/a 0.000 0.000 0.000
Aug-20 3rd 2020 n/a 0.000 0.000 0.000
Sep-20 n/a 0.000 0.000 0.000
Oct-20 n/a 0.000 0.000 0.000
Nov-20 4th 2020 n/a 0.000 0.000 0.000
Dec-20 n/a 0.000 0.000 0.000
Jan-21 n/a 0.000 0.000 0.000
Feb-21 1 st 2021 n/a 0.000 0.000 0.000
Mar-21 n/a 0.000 0.000 0.000
Apr-21 n/a 0.000 0.000 0.000
May-21 2nd 2021 n/a 0.000 0.000 0.000
Jun-21 n/a 0.000 0.000 0.000 0.000
Jul-21 n/a 0.000 0.000 0.000 0.000
Aug-21 3rd 2021 n/a 0.000 0.000 0.000 0.000
Sep-21 n/a 0.000 0.000 0.000 0.000
Oct-21 n/a 0.000 0.000 0.000 0.000
Nov-21 4th 2021 n/a 0.000 0.000 0.000 0.000
Dec-21 n/a 0.000 0.000 0.000 0.000

Chemours Company-Fayetteville Works Semiannual Report-2nd Half 2021
Air Permit No. 03735T48
ATTACHMENT D
Emission Summary Tables
TABLE 4:PSD AVOIDANCE CONDITION:SITE-WIDE BOILERS-SULFUR DIOXIDE EMISSIONS SUMMARY
EMISSION SOURCE ID NO.PS-A,PS-B,AND PS-TEMP
S02 Limit=702.5TPY
Sulfur BoilerNo.l A) Boiler No.2 B Rental Boiler
Concentration �-) (PS-Ted) Sulfur Dioxide(SO2)
#2 FueI Oil #2 Ftsel Oil Natural Gas Monthly S02 #2 Fuel Oil Natural Gas Monthly SO: #2 Fuel Oil Natural Gas Monthly SOr Total Monthly 12-Month
Month Quarter Burned Burned Emissions Burned Burned Emissions Burned Burned Emissions Emissions Summation
(/) (M gal) (nxmcf) (Tons) (M gal) (mmscf) (Tons) (M gal) (-cf) (Tons) (Tons) (Tons)
Jul-20 da 0.000 23.830 0.007 0.000 21.120 0.006 0.000 0.000 0.000 0.013
A -20 3rd 2020 da 0.000 49.600 0.015 0.000 0.040 0.000 0.000 0.000 0.000 0.015
Se-20 da 0.000 51.050 0.015 0.000 1.390 0.000 0.000 0.000 0.000 0.016
Oct-20 da 0.000 13.290 0.004 0.000 16.580 0.005 0.000 0.000 0.000 0.009
Nov-20 4th2020 da 0.000 63.790 0.019 0.000 0.040 0.000 0.000 0.000 0.000 0.019
Dec-2 0 da 0.000 48.310 0.014 0.000 17.630 0.005 0.000 0.000 0.000 0.020
Jan-21 da 0.000 41.120 0.012 0.000 16.520 0.005 0.000 0.000 0.000 0.017
Feb-21 1st2021 da 0.000 41.670 0.013 0.000 12.190 0.004 0.000 0.000 0.000 0.016
Mar-21 da 0.000 49.460 0.015 0.000 0.040 0.000 0.000 0.000 0.000 0.015
r-21 da 0.000 41.160 0.012 0.000 0.170 0.000 0.000 0.000 0.000 0.012
Ma-21 2nd 2021 da 0.000 26.390 0.008 0.000 11.770 0.004 0.000 0.000 0.000 0.011
Jun 21 da 0.000 0.270 0.000 0.000 35.300 0.011 0.000 0.000 0.000 0.011 0.175
Jul-21 da 0.000 0.000 0.000 0.000 32.910 0.010 0.000 0.000 0.000 0.010 0.171
A -21 3rd 2021 da 0.000 6.270 0.002 0.000 30.790 0.009 0.000 0.000 0.000 0.011 0.167
Se 21 da 0.000 6.160 0.002 0.000 30.240 0.009 0.000 0.000 0.000 0.011 0.163
Oct-21 da 0.000 0.250 0.000 0.000 18.920 0.006 0.000 0.000 0.000 0.006 0.159
Nov-21 4th 2021 da 0.000 11.190 0.003 0.000 29.260 0.009 0.000 0.000 0.000 0.11 0.I52
Dec-21 da 0.000 22.700 0.007 0.000 21.660 0.006 0.000 0.000 0.000 0.013 0.146

Chemours Company-Fayetteville Works Semiannual Report-2nd Half 2021
Air Permit No. 03735T48
ATTACHMENT D
Emission Summary Tables
TABLES
TOXIC AIR POLLUTANT EMISSIONS SUMMARY
Facility Maximum
Pe rmitte d
Emissions Emission Rate
Toxic Air Pollutant Emission
During During Past
Limit
4Q21 Quarter
Acetaldehyde 0lb. 0.01lb/hr 395lb/hr
Acetic Acid 422 lb. 0.83 lb/hr 54.1 lb/hr
Acrolein 0lb. 0.00 lb/hr 1.17lb/hr
Acrylonitrile 0lb. 0.00lb/yr 240lb/yr
Ammonia 678lb. 1.161b/hr 39.5lb/hr
Ammonium Chromate 0 lb. 0.00 lb/day 0.54 lb/day
Ammonium Dichromate 0 lb. 0.00 lb/day 0.54 lb/day
Aniline 0lb. 0.00 lb/hr 14.62lb/hr
Arsenic&Inorganic Arsenic 0 lb. 0.11 lb/yr 0.37 lb/yr
Aziridine 0lb. 0.00lb/day 5.26lb/day
Benzene 2lb. 9.24lb/yr 192lb/yr
Benzidene and salts 0 lb. 0.00 lb/yr 0.02 lb/yr
Benzo(a)pyrene Olb. 0.00lb/yr 52.8lb/yr
Benzyl Chloride 0 1b. 0.00 1b/hr 7.31 lb/hr
Beryllium 0lb. 0.01lb/yr 6.561b/yr
Beryllium Chloride 0 lb. 0.00 lb/yr 6.56 lb/yr
Beryllium Fluoride 0 lb. 0.00 lb/yr 6.56 lb/yr
Beryllium Nitrate 0 lb. 0.00 ib/yr 6.56 lb/yr
Bis-chloromethyl Ether 0 lb. 0.00 lb/yr 0.59 lb/yr
Bromine 7lb. 0.00 lb/hr 2.92lb/hr
1,3-Butadiene 0lb. 0.00lb/yr 272lb/yr
Cadrnilun 0lb. 0.61 Ib/yr 8.8lb/yr
Cadmium Acetate 0 lb. 0.00 Ib/yr 8.8 lb/yr
Cadmium Bromide 0 lb. 0.00 lb/yr 8.8 lb/yr
Calcium Chromate 0 lb. 0.00 lb/yr 0.13 lb/yr
Carbon Disulfide 0 lb. 0.00 lb/day 163 lb/day
Carbon Tetrachloride 0 lb. 0.00 lb/yr 10,723 lb/yr
Chlorine 410lb. 0.19lb/hr 13.11b/hr
Chlorine 410lb. 4.46lb/day 32.9lb/day
Chlorobenzene 0 Ib. 0.00 lb/day 1,929 lb/day
Chloroform Olb. 1.00lb/yr 6,882lb/yr
Chloroprene Olb. 0.00 lb/hr 51.1lb/hr

Chemours Company -Fayetteville Works Semiannual Report-2nd Half 2021
Air Permit No. 03735T48
ATTACHMENT D
Emission Summary Tables
TABLE 5
TOXIC AIR POLLUTANT EMISSIONS SUMMARY (continued)
Facility Maximum
Pe rmitte d
Emissions Emission Rate
Toxic Air Pollutant Emission
During During Past
Limit
4Q21 Qua rte r
Chloroprene 0lb. 0.00lb/day 3861b/day
Chromic Acid 0 lb. 0.02 Ib/day 0.54 lb/day
Chromium(VI) 0 lb. 0.00 lb/yr 0.13 lb/yr
Cresol 0lb. 0.00 lb/hr 32.151b/hr
para-(1,4)dichlorobenzene 0 lb. 0.00 lb/hr 965 lb/hr
Dichlorodifluoromethane 0lb. 0.00lb/day 217,477lb/day
Dichlorofluoromethane 0 Ib. 0.00 lb/day 43 8 lb/day
Di(2-ethylhexyl)phthalate 0 lb. 0.00 lb/day 26.3 lb/day
Dimethyl Sulfate 0 lb. 0.00 Ib/day 2.63 lb/day
1,4-dioxane 0lb. 0.00lb/day 4911b/day
Epichlorohydrin 01b. 0.00lb/yr 132,832lb/yr
Ethyl Acetate 4 lb. 0.00 lb/hr 2,046 lb/hr
Ethylenediamine 0lb. 0.00 lb/hr 36.5lb/hr
Ethylenediamine 01b. 0.00lb/day 263lb/day
Ethylene Dibromide 0 lb. 0.00 lb/yr 640 Ib/yr
Ethylene Dichloride 6 lb. 21.79 lb/yr 6,081 lb/yr
Ethylene Glycol Monoethyl Ether 0 lb. 0.00 lb/hr 27.8 lb/hr
Ethylene Glycol Monoethyl Ether 0 lb. 0.00 lb/day 105 lb/day
Ethylene Oxide 0 lb. 0.00 lb/yr 43.2 Ib/yr
Ethyl Mercaptan 0 lb. 0.00 lb/hr 1.46 lb/hr
Fluorides 0lb. 0.06lb/hr 3.651b/hr
Fluorides 0lb. 1.461b/day 14.03lb/day
Formaldehyde 9lb. 0.09lb/hr 2.19lb/hr
Hexachlorocyclopentadiene 0lb. 0.00 lb/hr 0.15lb/hr
Hexachlorocyclopentadiene 0lb. 0.00lb/day 0.53lb/day
Hexachlorodbenzo-p-dioxin 0lb. 0.00lb/yr 0.12lb/yr
n-Hexane 2131b. 10.08lb/day 9651b/day
Hexane isomers 0 lb. 0.00 lb/hr 5,262 lb/hr
Hydrazine 0lb. 0.00 lb/hr 0.53lb/hr
Hydrogen Chloride 151 lb. 0.26 lb/hr 10.2 lb/hr
Hydrogen Cyanide 0 lb. 0.00 lb/hr 16.1 lb/hr
Hydrogen Cyanide 0 lb. 0.00 lb/day 123 lb/day

Chemours Company-Fayetteville Works Semiannual Report-2nd Half 2021
Air Permit No. 03735T48
ATTACHMENT D
Emission Summary Tables
TABLE 5
TOXIC AIR POLLUTANT EMISSIONS SUMMARY (continued)
Facility Maximum
Emissions Emission Rate Permitted
Toxic Air Pollutant - Emission
During During Past
Limit
4Q21 Qua rte r
Hydrogen Fluoride(High Stacks) 248 lb. 0.33 lb/hr 7.28 lb/hr
Hydrogen Fluoride(High Stacks) 248.lb. 7.84 lb/day 52.45 lb/day
Hydrogen Fluoride(Other sources) 0 Ib. 0.33 lb/hr 2.7 lb/hr
Hydrogen Fluoride(Other sources) 0 Ib. 7.84 lb/day 19.4 lb/day
Hydrogen Sulfide 35 1b. 0.02 lb/hr 30.7 lb/hr
Maleic Anhydride 0 Ib. 0.00 lb/hr 1.46 lb/hr
Maleic Anhydride 0 Ib. 0.00 lb/day 10.5 lb/day
Manganese&Compounds 0 lb. 0.03 lb/day 27.2 lb/day
Manganese Cyclopentadienyl Tricarbonyl 0 1b. 0.00 lb/day 0.53 lb/day
Manganese Tetroxide 0 Ib. 0.00 lb/day 5.44 lb/day
Mercury,alkyl 0 Ib. 0.00 lb/day 0.05 lb/day
Mercury,aryl&inorganic 0 Ib. 0.00 lb/hr 0.53 lb/hr
Mercury,vapor 0 Ib. 0.00 lb/hr 0.53 Ib/hr
Methyl Chlorofonn 0 lb. 0.00 lb/hr 3,581 lb/hr
Methyl Chloroform 0 Ib. 0.01 lb/day 10,523 lb/day
Methylene Chloride 0'1b. 0.00 lb/hr 24.85 lb/hr
Methylene Chloride 0 lb. 972 Ib/yr 38,409 lb/yr
Methyl Ethyl Ketone 258Ib. 0.551b/hr 1,293lb/hr
Methyl Ethyl Ketone 258 lb. 4.11 lb/day 3,245 lb/day
Methyl Isobutyl Ketone 0 lb. 0.00 lb/hr 43 8 lb/hr
Methyl lsobutyl Ketone 0':lb. 0.00 lb/day 2,245 lb/day
Methyl Mercaptan I Ib. 0.00 lb/hr 0.73 lb/hr
Nickel Carbonyl 0 Ib. 0.00 lb/day 0.53 lb/day
Nickel Metal 0 lb. 0.02 lb/day 5.26 lb/day
Nickel,soluble compounds 0 Ib. 0.00 lb/day 5.26 lb/day
Nickel Subsulfide 0 Ib. 0.00 lb/yr 3.36 lb/yr
Nitric Acid 31 1b. 0.01 lb/hr 14.6 lb/hr
Nitrobenzene 01b. 0.00 lb/hr 7.31lb/hr
Nitrobenzene 01b. 0.00lb/day 52.61b/day
N-nitrosodimethyhrnine 01b. 0.00lb/yr 80.01b/yr
Pentachlorophenol OIb. 0.00 lb/hr 0.37lb/hr
Pentachlorophenol 01b. 0.00lb/day 2.63lb/day

Chemours Company -Fayetteville Works Semiannual Report-2nd Half 2021
Air Permit No. 03735T48
ATTACHMENT D
Emission Summary Tables
TABLE 5
TOXIC AIR POLLUTANT EMISSIONS SUMMARY (continued)
Facility Maximum
Pe rmitte d
Toxic Air Pollutant Emissions Emission Rate Emission
During During Past
Limit
4Q21 Qua rte r
Perchloroethylene Olb. 0.00lb/yr 304,073lb/yr
Phenol 01b. 0.00 lb/hr 13.91b/hr
Phosgene 0lb. 0.00lb/day 2.19lb/day
Phosp hine 0 lb. 0.00 lb/hr 1.9lb/hr
Polychlorinated Biphenyls 0 lb. 0.00 lb/yr 133 lb/yr
Potassium Chromate 0 lb. 0.00 lb/day 0.54 lb/day
Potassium Dichromate 0 lb. 0.00 lb/day 0.54 lb/day
Sodium Chromate 0 lb. 0.00 lb/day 0.54 lb/day
Sodium Dichromate 0 lb. 0.00 lb/day 0.54 lb/day
Strontium Chromate 0 lb. 0.00 lb/yr 0.13 lb/yr
Styrene Olb. 0.00 lb/hr 155lb/hr
Sulfuric Acid 91 lb. 0.49 lb/hr 1.46 lb/hr
Sulfuric Acid 91 lb. 8.37 lb/day 10.5 lb/day
Tetrachlorodibenzo-p-dioxin 0lb. 0.00lb/yr 0.0048lb/yr
1,1,1,2-Tetrachloro-2,2,Difluoro ethane 0 lb. 0.00 lb/day 45,600 lb/day
1,1,2,2-Tetrachloro-1,2,Difluoro ethane 0lb. 0.00lb/day 45,6001b/day
1,1,1,2-tetrachloroethane 0lb. 0.00lb/yr 10,082lb/yr
Toluene 898 lb. 3.17 lb/hr 818 lb/hr
Toluene 898 lb. 29.40 lb/day 4,122 lb/day
Toluene-2,4-diisocyanate 0lb. 0.00 lb/hr 0.22lb/hr
Toluene-2,4-diisocyanate 0lb. 0.00lb/day 0.441b/day
Trichloro ethylene 0lb. 0.00lb/yr 94,423lb/yr
Trichlorofluoromethane 0 lb. 0.00 lb/day 8,185 lb/hr
1,1,2-Trichloro-1,2,2-Trifluoroethane 0lb. 0.00 lb/hr 13,885lb/hr
Vinyl Chloride 0 lb. 0.00 lb/ r 608 lb/
y y yr
Vinylidine Chloride 0 lb. 0.00 lb/day 105 lb/day
Xylene 2,358 lb. 5.17 lb/hr 9 5 0 lb/hr
Xylene 2,358lb. 37.681b/day 2,368lb/day
Zinc Chromate 0 lb. 0.00 lb/yr 0.13 lb/yr