NCS000548_2021 DMR_20210226

A DUKE
*' ENERGY_
February 24, 2021
DUKE ENERGY CORPORATION
Marshall Steam Station
8320 East NC Highway 150
Terrell, NC 28682
NC Dept. of Environmental Quality
Attention: Central Files
Division of Water Resources
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: Duke Energy Carolinas, LLC
NPDES Stormwater Discharge Monitoring Report for:
Marshall Steam Station - NCS000548 — Catawba County
Year 6 Tier II monitoring
Dear Sir or Madam:
In accordance with Part III, E(2) of the above referenced NPDES Stormwater permit, the original
and one copy of the Stormwater Discharge Outfall (SDO) monitoring reports containing results of
the Tier II monthly sampling is attached.
Representative samples were not collected from SWO08 during January 2021 because of NO
FLOW conditions at the facility, including stormwater events not initiating during daylight hours or
stormwater events that did initiate on weekend days or inside 72-hour period since the last
stormwater event. Therefore, this report is submitted as a formal notification of the NO FLOW
conditions at the site for January 2021,
Effective January 21, 2021, stormwater outfall SWO07 is also no longer in Tier 2 status as reported
analytical results have remained below corresponding permit benchmarks for three consecutive
monitoring events. Additionally, SWO08 remains in Tier 3 status for four intermittent TSS values
reported outside the benchmark range within the permit cycle.
Please direct any correspondence or questions concerning the Marshall Steam Station NPDES
Stormwater Program to Robert Wylie at [phone].
Sincerely,
A � 4e�
�.
Rick R. Roper
General Manager III
Marshall Steam Station
attachment
www.duke-energy.com

be w/attachment: Scott La Sala
Robert Wylie
File: CCP EHS
UPS Tracking Number 1Z8955X40394441813 Raleigh Central Office
DUKE ENERGY CORPORATION
Marshall Steam Station
8320 East NC Highway 150
Terrell, NC 28682
www.duke-energy.com

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