AQ_F_1900134_20220309_CEM_RptRvwLtr

Etc STATE
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ROY COOPER
Governor
ELIZABETH S.BISERf,z�M
Secretary
MICHAEL ABRACZINSKAS NORTH CAROLINA
Director Environmental Quality
March 9, 2022
Mr. Issa J. Zarzar
General Manager- Central Carolina Projects
Duke Energy Progress, LLC
500 C P and L Road
Moncure,NC 27559-9517
SUBJECT: Review of 2021 Fourth Quarter STAR®Unit S02/CO2 CEMS Report
Duke Energy Progress LLC - Cape Fear STAR® Facility
Moncure, Chatham County,North Carolina
Air Permit No. 10583ROI
Facility ID No. 1900134
Dear Mr. Zarzar:
Thank you for the timely submittal of the subject report, dated January 19, 2022, and
received January 27, 2022. The report included an assessment of the continuous emissions
monitoring systems (CEMS) operating on Duke Energy's Cape Fear STAR® (Staged Turbulent
Air Reactor)Unit (ID No. ES-5) during the fourth quarter of 2021. The Division of Air Quality
(DAQ) has completed its review of the CEMS-related information in the report and has the
following comments:
1. A review of the sulfur dioxide (S02)/carbon dioxide (CO2) CEMS compliance report on the
ash beneficiation STAR®process pursuant to NCAC 2D .0516 - Sulfur Dioxide Emissions
from Combustion Sources and Air Permit No. 10583, Specific Condition 2.1.A.2 indicated
that there were no exceedances of the S02 emission limit (2.3 pounds per million Btu; 3-hour
rolling average).
2. Also, a review was conducted for compliance with good operation and maintenance (O&M)
practices pursuant to NCAC 2D .0605 and General Condition F.10. Unless otherwise
specified in regulation, DAQ considers sources to have operated with proper O&M if percent
excess emissions (%EE) and percent monitor downtime (%MD) are less than the target
criteria of 6% for any single quarter and less than 3% for two consecutive quarters. Since the
report indicated%EE was 0.00% and%MD was 0.09%, the STAR®Unit along with its
associated air pollution control equipment appears to have been operated in a manner
consistent with proper O&M practices for minimizing emissions.
3. As required by Specific Condition 2.1.A.2.9, the report included monthly S02 emissions for
nine (9)months based upon CEMS data. Eventually, the report will include monthly S02
emissions for 17 months and be used to calculate each 12-month period over the previous 17
months.
D Q2177 North Carolina Department of Environmental Quality I Division of Air QualityE West Jones Street 11641 Mail Service Center I Raleigh,North Carolina 27699-1641
NORTH CAROLINA
oePanment of Environmental Uwi\ /� 919.707.8400

Mr. Issa J. Zarzar
March 9, 2022
Page 2
4. Finally, consistent with the facility's Quality Assurance Plan, which was developed pursuant
to NCAC 02D .0613 - Quality Assurance Program and Specific Condition 2.1.A.2.d, a
quarterly cylinder gas audit(CGA)was submitted. The CGA was conducted by J. Punch on
November 23, 2022 and reviewed for compliance with 40 CFR Part 60, Appendix F,
Procedure 1 - Quality Assurance Requirements for Gas Continuous Emission Monitoring
Systems Used for Compliance Determination. Results from the quarterly CGA appear to
have met the requirements of Procedure 1 and are therefore acceptable.
In addition to the mailing of this letter, an electronic copy (e-copy) is being provided for
your records. If you should have any questions, please contact me at [phone] or
[e-mail].
Sincerely,
Dennis U. Vboko, Environmen 1 Engineer
Division of Air Quality,NCD
c: Issa Zarzar, Duke Energy (e-copy)
Erin Wallace, Duke Energy(e-copy)
Cynthia Winston, Duke Energy(e-copy)
Taylor Hartsfield, DAQ RRO (e-copy)
Gary Saunders, DAQ SSCB (e-copy)
IBEAM Documents, 1900134 (e-copy)
Central File, Chatham County