NC0000396_More Information Received_20181102

cir: DUKE 411 Fayetteville St,NC15
ENERGY® Raleigh,NC 27601
919.546.2439
November 2, 2018 RECEIVED/DENPJDWR
Mr. Jeff Poupart, Section Chief NOV ® 8 2018
NC DWR Permitting Section
1617 Mail Service Center Water Resources
Raleigh,NC 27699-1617 Permitting Section
Subject: Hydrostatic testing of new Condensers
Asheville Steam Plant—Combined cycle
NC0000396
Buncombe County
Dear Mr. Poupart:
In accordance with G.S. 143-215.1(c), flushing and hydrostatic testing waters are deemed to be
permitted, "...provided that no water quality standards are contravened, or expected to be contravened,
and it shall not be necessary for the Division to issue separate permits for these activities Duke Energy
Progress,LLC(Duke Energy) is in the process of constructing components of the future combined cycle
power plant at the subject facility. Duke Energy plans on utilizing municipal potable water to flush/test
two 68,000 gallon condensers for the future combined cycle plant at the Asheville Station. The test
consists of filling the condensers and holding the water for 24-hours prior to draining. The condensers
have been manually swept of any debris. A visual check for oil and grease will be conducted prior to
draining the condensers. Duke Energy intends to direct this flow to the station's rim ditch where
treatment and NPDES compliance sampling occurs to provide additional assurance that the receiving
waters are protected. It is anticipated that the flushing activities will be necessary for a period of
approximately seven days.
In conclusion,this temporary activity will not significantly change the characteristics of the rim ditch
discharge. The discharge of the flushed water will not cause the flow volumes to exceed previous flow
volumes used for determining permit limits. This project will not result in the contravention of any water
quality standards. This operation will begin in the near future. It is our understanding that this operation
is deemed permitted and can begin in accordance with the aforementioned statute.
If there are any questions about this matter, please contact Tina Woodward at 704-382-4585 or
[e-mail].
Sincerely,
(Fketvvva-x--
E. Shannon Langley
Principal Environmental Specialist
Cc: Landon Davidson—Asheville DWR Office
Tina Woodward
Sergei,Chernikov,NC DWRpermitting-Section