NC0004774_Other Correspondence_20190612

j DUKE
V­�r ENERGY.
June 12, 2019
W. Corey Basinger, Regional Supervisor
Water Quality Regional Operations
North Carolina Division of Water Quality
610 East Center Avenue, Suite 301
Mooresville, NC 28115
RE: Duke Energy Carolinas, LLC - Buck Combined Cycle
NPDES Permit Number NC0004774
Notice of Violation
NOV-2019-LV-0337
Dear Mr. Basinger:
Duke Energy
Buck Combined Cycle
1385 Dukeville Road
Salisbury, NC 28146
JUN 2 1 '(-'019
WQR� o
MOOFI V€I.L.l REi iCNAL O F C5
The Buck Combined Cycle Station received your letter on May 14th, 2019, transmitting a Notice of
Violation (NOV-2019-LV-0337) for the facility's NPDES permit. For the March 2019 Discharge Monitoring
Report, Duke Energy reported a daily maximum and monthly average Zinc permit exceedance and one
daily minimum pH permit exceedance for outfall 001 A. In response, Duke Energy offers the following
information for further consideration.
The Buck Combined Cycle Station commissioned wastewater outfall 001 A on February 11, 2019. This
new outfall eliminated discharges from the combined cycle to the ash basin. Thus outfall 001A is a new
direct discharge from the combined cycle to the main stem of the Yadkin River. A planned station outage
occurred during the months of March and April 2019, being the first evolution for outage -related activities
and flows not directed to the ash basin system.
Once Duke Energy received sample results, the station ceased all discharges to outfall 001 A, routed
wastewater flows to the cooling tower basin until normal operating conditions resumed and wastewater
was verified to be in compliance with NPDES limits.
Please contact Elizabeth Glenn at [phone] or [e-mail] if there are any
questions.
l certify, under penalty of law, that this document and all attachments were prepared under my direction or
supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the
information submitted. Based on my inquiry of the person or persons who manage the system, or those persons
directly responsible for gathering the information, the information submitted is, to the best of my knowledge and
belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information,
including the possibility of fines and imprisonment for knowing violations.
Yours truly,
Kristopher C. Eisenrieth
General Manager 11
Buck Combined Cycle
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