NCS000548_Permit Mod Request to Remove SW006 SW009 SW023_20190417

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APR 17 2019
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Land Qualky Section
Vlr'oresvivs0 Regioaai Office
April 5, 2019
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Mr. Zahid Khan
North Carolina Department of Environmental Quality
Mooresville Regional Office
610 East Center Ave.
Mooresville, NC 28115
Subject: Marshall Steam Station
Industrial Storm Water Permit Number NC000548
Elimination of Stormwater Outfalls
Dear Mr. Khan:
Marshall Steam Station
8320 East NC Hwy 150
Terrell, NC 28682
o: 828,478.7700
Recently at Marshall Steam Station the outlet or drainage areas for several stormwater
outfalls have been changed. These changes are described below. Based on these
changes it is requested that these outfalls be removed from stormwater permit
NCS000548.
• SWO06 - This outfall was plugged and the drainage was redirected to a ditch that
drains into the NPDES Yard Sump #1. This sump is part of the NPDES
wastewater treatment system and pumps to the recently constructed Lined
Retention Basin (LRB) which is NPDES permitted Outfall 005.
• SWO09 - This outfall used to also include roof drains from the powerhouse.
These roof drains have been redirected to Yard Sump #2 which is part of the
NPDES wastewater treatment system and pumps to the LRB. Stormwater from
a very small area (approx. 0.4 acres) drains and combines with NPDES
permitted Outfall 003.
SW023 - This outfall was originally created in 2006 as part of the erosion control
plan for a laydown yard associated with the construction of the Flue Gas
Desulfurization System (FGD). In 2018, a new FGD wastewater treatment facility
was constructed at the location of the laydown yard. The storm water drain
system for this area is in place to capture the storm water, direct it to sumps that
discharge to the LRB.

Page 2
April 4, 2018
Letter to Zahid Khan
NCS000548
If have questions or need additional information please contact Robert Wylie at (704)
382-4669. Your cooperation in this matter is appreciated.
I 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,
Rick Roper
General Manager III
Marshall Steam Station
cc: Scott La Sala
Robert Wylie
UPS: 1Z8955X40395328819 DEQ-Mooresville