NC0004979_Permit Change Request_20191009

ir•N DUKE Allen Steam Station
2ENERGY® ea Allen Roaa
Belmont, NC 28012
o:704 829-2857
October 9, 2019
Ms. Julie Grzyb RECEIVED
North Carolina Department of Environmental Quality
Division of Water Resources OCT 10 2019
1617 Mail Service Center NCDEQIDWRINPDES
Raleigh, NC 27699-1617
Subject: Allen Steam Station
NPDES Permit NC0004979
Permit Change Request in accordance with re-opener clause
Dear Ms. Grzyb:
totwo-year
r ct to the 5 Circuit recentlyupholding the EPA's delayof the
With respect p p g
Effluent Limitations Guideline (ELG) dates, November 1 , 2020 is the earliest date for
implementation of the more stringent ELG requirements for Flue Gas Desulfurization
(FGD) treated wastewater. With this ruling, in accordance with permit re-opener clause
found in condition A.(8) it is requested that effective date of February 28, 2020 for FGD
internal Outfall 005 for Plant Allen be changed to November 1, 2020 to align with 40
CFR Part 423.
In addition to the above request, Duke Energy Carolinas, LLC has recently surveyed the
compliance boundary for the ash basin. Attached is a figure that depicts a slight
revision to this boundary. It is requested that this figure be accepted as the official
compliance boundary of the ash basin.
If you have questions, please contact Robert Wylie at [phone].
Sincerely,
Terry Tuck, General Manager II
Allen Steam Station
cc: Ori Tuvia
UPS Tracking: Raleigh: 1Z X67 601 24 9828 4247
Mooresville: 1Z X67 601 24 9527 9651

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LEGEND
-SITE FEATURE r -. •
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-ACTIVE ASH BASIN WASTE BOUNDARY • / 1 I
r..-ASH BASIN COMPLIANCE BOUNDARY 1' ,
RETIRED ASH BASIN WASTE BOUNDARY L.. • ATAWBA RIVER
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(LAKE WYLIE)
RETIRED ASH BASIN ASH LANDFILL WASTE
BOUNDARY SEE INSET ;
RETIRED ASH BASIN ASH LANDFILL -
COMPLIANCE BOUNDARY i=
DORS FILLS BOUNDARIES i.`
_ DUKE ENERGY CAROLINAS ALLEN STEAM STATION SITE BOUNDARY '
STREAM(AMEC NRTR 2015) ''
WETLAND(AMEC NRTR 2015) » 4'DUKE 375 0 375 750
NOTES. 'C ENERGY. GRAPHIC SCALE IN FEET FIGURE 1
ALL BOUNDARIES ARE APPROXIMATE. WASTE AND COMPLIANCE BOUNDARIES
DRAWNBY: AT DATE:10/03/2019 ALLEN STEAM STATION
PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS. REVISED BV:C..WYATT DATE:10/03/2019
AERIAL PHOTOGRAPHY OBTAINED FROM GOGGLE EARTH PRO ON APPROVED BY:L.DRAGO DATE:10/03/2019 g E L M O N T NORTH CAROLINA
DECEMBER 13,2018.AERIAL WAS COLLECTED ON MARCH 30,2018. CHECKED BY:L.DRAGO DATE:10/03/2019 i
DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA synTerra PROGRAM MANAGER:C.SUTTELL
STATE PLANE COORDINATE SYSTEM FIPS 3200(NAD83)
www.synterracorp.com