NC0024406_Semi-Annual Report_20160421

f <? DUKE EBelews Creek Steam Station
ENERGY
I Duke Energy Carolinas
3195 Pine Hall Road
Belews Creek, NC 27009
April 21, 2016
RECEIVED/NCDEUDWR
Mr. Sergei Chernikov. PhD
State of North Carolina APR 25 2015
Department of Environment and Natural Resources Water Quality
Division of Water Resources Permitting Section
Complex NPDES Permitting Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: Duke Energy Carolinas, Inc.
Belews Creek Steam Station - NPDES Permit #NC0024406
Bromide Reduction Evaluation Semi-Annual Report
Dear Mr. Chernikov:
As required by Special Condition A (14) in the Belews Creek NPDES permit attached are three
copies of the Semi-Annual Status Report, which summarizes the efforts to reduce bromide
discharge and total trihalomethane (TTHM) formation.
Should you have any questions regarding this report, please contact me at 336-394-5524.
Yours truly,
et.-44
oyce Dishmon
Duke Energy, Environmental Health Safety Department
EHS —Permitting and Compliance
Attachment

Belews Creek Steam Station
Bromide Reduction Evaluation NPDES Permit—NC0024406
Semi-Annual Report Progress Report
October 2015
Prepared April 21, 2016
Pursuant to A (14) Bromide Reduction Evaluation of the NPDES Permit — NC0024406, Belews
Creek Steam Station submits the following semi-annual progress report. Duke Energy is
required to summarize investigations focused on minimizing bromide discharge at Outfall 003 as
well as efforts aimed at reducing the formation of total trihalomethanes (TTHM) at downstream
water treatment plants.
• Duke Energy has worked cooperatively with DWR and the towns of Madison and
Eden to address the bromide/TTHM issues since being advised of the towns' issues
with TTHM formation.
• There is no water quality standard for bromide and therefore no NPDES permit
limit. Bromide itself not a health concern in surface waters.
• Duke Energy has provided direct technical expertise and financial assistance to
Madison and Eden to help resolve their respective TTHM issues.
Madison
• Nothing new to report.
Eden
• Eden is continuing work on its chloramines conversion project. The project has been
delayed due to construction issues.
Belews Creek Steam Station
• [INC-C continues progress with the next phase of the halide study.