NC0001422_1-July 7th Letter Re TOC_20150805

NCDENR
Forth Carolina Department ut Environment and Natural Resources
Pat MUG[ uty
(3overnor
July 7, 2015
Duke Energy
c/o: Mr. D. Edwin M. Sullivat-I
P.O. Box 1006 Mail Code EC13K
Charlotte, North Carolina 28201-1006
RE: Conditional Approval Letter Response
L.V. Suttun Energy Complex
New Hanover County, North Carolina
Dear Mr. Sullivan:
Uonala R. van der Vaart
Seurtrtal y
The vivision of Water Resources received Duke Energy's May 22, 2U 15 response to DENR's
Conditional Approval dated February 6, 2015 for the L.V. Sutton Energy Coinplex Revised
Groundwater Assessment Work Plan. Duke Energy provided responses ter the following sections:
® 7.1 Subsurface Exploration
• 7.2 Ash Pure Waer and Groundwater Sampling and Analysis
a 7.3.1 Water Quality Sara les
Please incorporate and implement the agreed upon scvpe of work as related to the above conditions
and outlined in Duke Energy's May 22, 2015 response.
Additionally, Duke Energy requests guidance regadiiig solid phase testing methods for total
organic carbonate content. ResearLh conducted by the Division has not identified a laboratory
method for analysis of total orgaztic carbonate with respect to solid _phase samples. We appreciate
Duke Energy bringing this issue to ut.0 attention. Since a suitable laboratory method for tutal
urga.uic cai bursate has not been found, Duke Energy is not cumpclled to perfurm this analysis as part
of the groundwater assessment at the L.V. Sunun Plzuit and other facilities located in the Coastal
Plain.
Should you have any questions or require additional information, please contact Geoff Kegley at
910-796-7328.
Division -uT vvater RCsuarvCs - Water Quality Regional Operations Section - Wilmington Regional urm;e
1z1 Carainal Drive Ext., Wilmi,igton, NC 28405
Phone: [phone] \ Fax: 910-35U-z004t Internet: www.nt;denr.gov
An Equal Opportunity 1 AMrMdd,. Nedon tMplOya — Made In part by recycled paper

Mr. Sullivan
July 7, 2015
Page 2
Sll1l:GiGly,
i
MorGIIa S ezr 1"Ph.u, Y.E
Environm rogran Supervisor
Division of Water Resources Water duality Regional Operations
Wihnington Regional Office
cc: Ricky Miller — Duke Energy
John Toepfer — Duke Energy
Kathy Webb — Syn I erra Corporation
Steven Lmter — Div. Water Resources — CGntrul Office