AQ_F_1000067_20151006_CEM_RptRvwLtr

North Carolina Department of Environmental Quality
Pat McCrory Donald R. van der Vaart
Governor
Secretary
October 6, 2015
Mr. David H. Groves
Plant Manager
Capital Power Corporation
P.O. Box 10836
1281 Powerhouse Drive SE
Southport,North Carolina 28461
Subject: I"Semi-Annual 2015 Continuous Emissions Monitoring Compliance Report(CEMCR)
I I Semi-Annual 2015 Excess Emission Report(EER)
Air Permit No. 05884T17
Facility I.D.No. 1000067
Dear Mr. Groves,
The Division of Air Quality(DAQ)has received the subject reports(CEMCR and EER)submitted by The
Capital Power Corporation in a letter dated July 28,2015. The reports were submitted for the continuous
emission monitoring system(CEMS)and continuous opacity monitoring system(COMS)operating on
electric generating Unit 1 and Unit 2, each consisting of three Boilers with the common stack.
DAQ' has reviewed the quarterly EERs for the semi-annual period ending June 30,2015.The percent excess
emissions(%EE) and percent monitor downtime(%MD) are summarized as follows:
Emission Pollutant Emission Excess Monitor Applicable
Unit Violations Emissions Downtime Regulations
(CEMCR) (%EE) (%MD)
Q1 Q2 Q1 Q2 Q1 Q2
Unit 1 NOx 0 0 ----- ----- 0.90% 4.91% §60.44b(a)/60.44b(c)
Boiler No. NCAC 2D .0530
ES-14A NCAC 2D .0501(e)
ES-1-1B S02 ----- ----- 0.00% 0.00% 0.60% 5.26% NCAC 2D .0530
ES-1-1C NCAC 2D .0501(e)
Common acity ----- ----- 0.02% 0.08% 0.57% 3.12% 60.43b(
Stack CO 0 0 ----- ----- 0.70% 4.76% NCAC 2D .1109
Unit 2 NOx 0 0 ----- ----- 0.70% 1.09% §60.44b(a)/60.44b(c)
Boiler No. NCAC 2D .0530
ES-2-1A NCAC 2D .0501(e)
ES-24B S02 ----- ----- 0.00% 0.00% 0.96% 0.65% NCAC 2D .0530
ES-2-1 C NCAC 2D .0501(e)
Common Opacity ----- ----- 0.02% 0.01% 0.71% 0.78% §60.43b(f)
Stack CO 0 10 1 ----- ----- 0.70% 0.54% NCAC 2D .1109
1641 Mail Service Center,Raleigh,North Carolina 27699-1641
Phone:[phone] Internet:www.ncdenr.gov
An Equal Opportunity 1 Affirmative Action Employer—Made in part by recycled paper

Mr.David H. Groves
October 6, 2015
Page 2
A review of the quarterly excess emissions reports(EER)indicated there were no violations of the applicable
emissions standards.The excess emissions noted above are excused pursuant to the applicable regulation.
Please note that each exceedance of the emission control standard unless excused by applicable regulation
can be credible evidence of a violation consistent with 40 CFR 60.11(g).
The reports were also reviewed with the general provision of 40 CFR 60.11(d), and 40 CFR 60.13 to assess
good operation and maintenance(O&M)practices for the facility and monitoring systems. As summarized
in the table on the previous page, with the exception of Unit 1,the emission units and associated
CEMS/COMS appeared to have operated using good O&M practices since quarterly percent excess
emissions(%EE) and percent monitor downtime(%MD)were less than 3%for two consecutive quarters
and 6%for any single calendar quarter.Please note that, since the second quarter 01.MD of CEMS/COMS
on Unit I was greater than 3%, we will make a final determination on quarterly O&M after reviewing the
2015 third quarter report.
We understand that replacement of monitors and DAS (data acquisition system)resulted in higher monitor
downtime(%MD)in second quarter for Unit 1.We had multiple e-mail and phone conversation with
Ginny Grace regarding higher monitor downtime and how to accurately assess the%MD and%EE. Based
on this,please submit the third quarter reports by October 30,2015.You can submit reports semi-annually,
once the issues with the DAS are identified and corrected.
The CGA(NO, S02 and CO)result for the Unit 1 and Unit 2,conducted during first and second quarter
were within 15% specification given in 40 CFR 60, Appendix F.
Please ensure that the opacity monitors meet the auditing requirements of QA/QC rule(40 CFR Part 60,
Appendix F,Procedure 3).
If you have any questions,please contact me at(919)707-8409 or [e-mail].
Sincerely, D
Samir Parekh,P.E.,Environmental Engineer
Division of Air Quality,NCDEQ
cc: Michael Pjetraj
Brad Newland—WiRO
Central File—Brunswick Co.
IBEAM—Documents— 1000067