NCS000571_Tier Notification_20240226

DUKE Rogers Energy Complex
573 Duke Power Road
ENERGY® Mooresboro,NC 28114
2/19/2024
NC Department of Environmental Quality �anaFNR 1�16 o�
Division of Energy, Mineral, and Land Resource �s�j644a�oFM<
610 East Center Avenue,Suite 301 Re:se R
9iphd/Gon
Mooresville, NC 28115 00�
Subject: Rogers Energy Complex
NPDES Permit NCS000571
ISW Tier Notification
Dear Mr. Kahn,
As directed by Part D., Section D-6 and D-7 of Stormwater Permit NCS000571, a notification is required
to the Mooresville Regional Office of sample results over benchmark. Results over benchmark were
received on 2/9/2024 for a sampling event of stormwater outfalls SW004 and SW016-42 that occurred
on 1/25/2024.
Tier Two status for Selenium was triggered at SW016-42 by the sample result shown in the table below.
Additionally, benchmark exceedances resulted for Zinc at SW004 and Copper, Mercury, and TSS at
SW016-42.These parameters are currently under a Tier Three status with the Action Plan still under
implementation.
Parameter Benchmark SW004 SW016-42"
Cu 10 ug/L 25.9 ug/L
Se 5 ug/L 6.72 ug/L (Tier 2)
Zn 126 ug/L 185 ug/L
Hg 12 ng/L 31 ng/L
TSS 100 mg/L 410 mg/L
During the stormwater management inspection for SW004, it was noted that the drainage area contains
a switchyard with a galvanized tank and structural steel that could be contributing to the exceedances.
During the stormwater management inspection for SW016-42 it was noted that the drainage area
contains heavy truck traffic.The Haul Road Action Plan to improve BMP measures and upgrade the haul
road is still under implementation.

DUKERogers Energy Complex
5 73ENERGY® M0000 Duke Power Road
fro) resboro,NC 28114
If you have any questions, please contact Randy Hawkins at(864)356-8257 or at randy.hawkins@duke-
energy.com.
"1 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."
Sincerely,
Brandon K.Sipe
General Manager III
Rogers Energy Complex
Regulated and Renewable Energy-Carolina Dispatchable Generation
bc: Steve Hodges
Randy Hawkins
ENV-30-32