NC0024406_Annual Report_20171018

DUKE
ENERGY®
October 18, 2017
Sergei Chernikov, PhD
State of North Carolina
Department of Environmental Quality
Division of Water Resources
Complex NPDES Permitting Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Belews Creek Steam Station
Duke Energy Carolinas
3194 Pine Hall Road
Walnut Creek, NC 27609
RECEIVED/NCDEUDWR
Subject: Duke Energy Carolinas, LLC
Belews Creek Steam Station - #NC0024406
Bromide Reduction Evaluation Semi —Annual Report
Dear Dr. Chernikov.
OCT 27 2017
Water Quailay
Permitting Section
As required by Condition A. (14) of the subject NPDES permit attached are three copies of the
Semi-annual status report summarizing Duke Energy's efforts to reduce bromide discharge and
potential subsequent Total Trihalomethane (TTHM) formation in downstream municipal water
treatment systems.
Should you have questions regarding this report, please contact Joyce Dishmon at 336-623
0238 or [e-mail].
Yours tru v.�
Reginald D. Anderson
General Manager III, Regulated Stations
Belews Creek Steam Station
Power Generating Carolinas East
Attachments

Belews Creek Steam Station
Bromide Reduction Evaluation NPDES Perm it-NC0024406
Semi -Annual Progress Report
October 2017
Pursuant to Condition A.(14) Bromide Reduction Evaluation of the NPDES Permit — NC0024406.
Duke Energy submits this semi-annual progress report This report is required to summarize
on-going 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 Town of Madison and City of
Eden to address the bromide/TTHM issues since being advised of the municipality's
issues with TTHM formation.
• Bromide itself is not a health concern in surface waters. There is no water quality
standard for bromide and no NPDES permit limit
• Duke Energy has provided direct technical expertise and financial assistance to Madison
and Eden to help address their respective TTHM issues.
Town of Madison
• No updated information new to report since the last submittal.
City of Eden
• City of Eden completed startup of the Chloramines Conversion System in August 2017.
Belews Creek Steam Station
• Duke Energy has completed a wastewater pilot treatment study at the FGD Wastewater
Treatment System (WWTS) to demonstrate halide removal. The concentrated
wastewater is being stored for a future solids fixation pilot study. Duke Energy notified
NC DEQ of the pilot study in the March 8, 2017 letter titled "Pilot Studies — Notification".
• Duke Energy has partnered with University of North Carolina at Charlotte (UNC -C) Civil
and Engineering Dept. and the engineering firm AMEC Foster Wheeler to complete the
next phase in the halide study. This phase, tentatively scheduled for the first quarter of
2018, will test UNC -C's previous lab work on the field demonstration scale. The goal is

to produce test beds of fixated coal combustion byproduct material and FGD
wastewater to monitor for halide sequestration. NC DEQ Division of Waste
Management Section authorized Duke Energy to conduct the Paste Demonstration
Project in the attached August 18, 2017 letter titled "Belews Creek Paste Demonstration
Project Authorization."
• Belews Creek is currently planning for 50% natural gas co -fire capabilities by 2019 and
2020 for Units 1 and 2, respectively. This modification to the operation of the station is
a result of other factors but is expected to have an added benefit of decreasinng of total
bromide discharge at Outfall 003.

Waste Management
ENVIRONMENTAL QUALITY
August 18, 2017
Sent by Email: Melonle martin2cduke-energy.com
Ms. Melonie Martin, Environmental Services
Duke Energy, Belews Creek Steam Station
3191 Pine Hall Road
Walnut Cove, North Carolina 27042
Subject: Belews Creek Paste Demonstration Project, Authorization
Permit No 8504 -INDUS-, Belews Creek Craig Rd Landfill
Stokes County, FID 731354
Dear Ms Martin:
ROY COOPER
Governor
MICHAEL S REGAN
Secrelaty
MICHAEL SCOTT
Direclor
On August 4, 2017, the Division of Waste Management, Solid Waste Section (Section) received
Duke Energy's letter, with attached plans and specifications, entitled;
Belews Creek Paste Demonstration - Engineering Plan Revision, Belews Creek Steam Station,
Belews Creek, North Carolina 27009, Stokes County Prepared by Duke Energy. August 2017.
DIN 28276.
Duke Energy's letter served as a request for authorization to construct, operate, maintain, and
eventually close the Paste Demonstration Project (Project), as described in the plans and
specifications. The proposed Project is designed to take place within the permitted limits of the
Craig Road Landfill, Permit No. 8504 -INDUS-. The following are the stated Project objectives,
1. Demonstrating and verifying bromide sequestration and environmental performance at
field -level including:
a. Evaluating the quantity and quality of leachate generation
b. Evaluating the quantity and quality of contact -water runoff
2. Evaluating paste process mixing, pumping, and placement
3. Evaluating short and long term paste physical characteristics.
The Section has reviewed the request and hereby authorizes Duke Energy to conduct the Project
as described in the submitted plans Furthermore, this authorization requires Duke Energy to
notify or submit the appropriate documentation (by email) to the Section for the following
Project milestones;
1. Commencement of construction of the Demonstration Project Pad, notification
2 Completion of the demonstration pad and process area construction, CQA submittal (as
described in the plans).
3. Commissioning of paste processing equipment, notification
4. Commencement of paste mixing and paste deposition, notification.
5. Completion of paste mixing and paste deposition, Operations Report submittal (as
described in the plans).
State of North Carolina I Environmental Quality I Waste Management
1646 Mail Service Center 1 217 West Jones Street I Raleigh, North Carolina 27699-1646
919 707 5200

Belews Creek Steam Station
August 18, 2017
FID731354
Page 2 of 2
6. Completion of the demobilization of paste process equipment, notification.
7. Prior to decommissioning of Project cells, coordinate the specific decommissioning
methods with and receive concurrence from Section.
8 Completion of decommissioning of Project cells, submittal of supporting documentation
as required by Section concurrence.
The documents regarding this issue can be found at;
littp://edocs.deq.ne.gov/WasteManagei-nent/O/fol/559/Rowl.aspx.
All changes to the authorized plans and specification, notifications and submittals, as well as
any questions regarding this authorization, should be directed to Larry Frost at (828) 296-
4704 or larry.frostgncdenr.arov
Sincerely, Digitally signed
by Edward F.
Mussler III P.E.
Date: 2017.08.18
11:04:41 -04'00'
Edward F. Musslci, III, P.E., Supervisor
Permitting Branch, Solid Waste Section
Division of Waste Management, NCDEQ
ec: Larry Frost — SWS/ARO
Shawn McKee — SWS/RCO
Elizabeth Werner — S WS/RCO