NC0003425_Renewal with chemical characterization_20160101

fen DUKE
ENERGY.
July 22, 2015
Mr. Jeff Poupart
North Carolina Division of Water Resources
1617 Mail Service Center
Raleigh, NC 27699-1617
Harry K. Sideris
Senior Vice President
Environmental, Health & Safely
526 S. Church Street
Mail Code: EC3XP
Charlotte, NC 28202
[phone]
Subject: Duke Energy Progress, Inc.
Roxboro Steam Electric Plant
Update to pending NPDES renewal applications and
Submittal of chemical characterization of water for dewatering ash basin
NC0003425
Person County
Dear Mr. Poupart:
In response to the request from the North Carolina Division of Water Resources, please find
attached a chemical characterization of ash basin free water and ash basin interstitial water for
the Roxboro Steam Electric Plant. The analysis conducted and reported herein is consistent with
the information requested by NC DENR for other Duke Energy sites. This is submitted in
support of potential upcoming dewatering activities.
The results of analysis on the chemical characterization of the ash basin free water and ash basin
interstitial water are presented: l.) without additional treatment beyond the treatment in the basin
and 2.) after additional treatment using different filter sizes. The following definitions may be
helpful for inclusion in a re -issued NPDES permit.
Ash basin free water: Water in an ash basin located above the settled layer of ash. Ash
basin free water has undergone treatment in the ash basin and has the same general
characteristics as water typically discharged from the ash basin.
Ash basin interstitial water: Water in an ash basin that is located within the pore space
of accumulated wastewater sludge or slurry.
If you have any questions, please contact Mr. Shannon Langley at [phone].

Mr. Jeff Poupart
Roxboro Free Water and Interstitial Water Submittal
July 22, 2015
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. 1 am aware that there are significant penalties for ,submitting false information,
including the possibility of fines and imprisonment for knowing violations.
Sincerely,
Harry . LSideris
Senior Vice President
Environmental, Health & Safety
Enclosures
cc: Richard Baker, Director w/enclosure
Shannon Langley w/enclosure

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