NC0004987_Additional Assessment of Groundwater_20120316

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A LT7
rgyA FILE
NCDENR
1 North Carolina Department of Environment and Natural Resources
Division of Water Quality
• Beverly Eaves Perdue Charles Wakild, P.E. Dee Freeman
Governor Director Secretary
March 16, 2012
Attn: Ed Sullivan and Allen Stowe
. Water Management
Duke Energy Corporation
EC 13K/Post Office Box 1006 •
Charlotte, NC 28201-1006
RE: Additional Assessment of Groundwater
Allen, Buck, Marshall & Riverbend Stations
Dear Mr. Sullivan and Mr. Stowe:
• We appreciate your meeting with staff of the Mooresville Regional Office of the Division of
Water Quality's Aquifer Protection Section (APS) on March 2nd to discuss groundwater monitoring
efforts at the subject facilities in the Mooresville Region.
To summarize the meeting,APS has requested that Duke begin additional assessment
activities at each of the stations where measured and modeled concentrations of groundwater
constituents exceed 2L groundwater quality standards at the compliance boundary.
Additional assessment activities may be specific to issues at certain wells and include, but
are not limited to: statistical evaluation of constituents that may be naturally occurring, refining
groundwater models for Riverbend and Allen to better describe the flow systems, continued well
development and evaluation of well location and construction, and the assessment of horizontal and
vertical extent of constituents in excess of standards.
•
We appreciate your cooperation and willingness to continue assessment and will look forward
to a plan outlining a timeline for these activities. Feel free to contact me at(704)235-2180 or via
email at Andrew.Pitner(7ncdenr.gov should you have any questions.
Sinc eiy,
Andrew H. Pitner, P.G •
Regional Aquifer Protection Supervisor •
Cc: APS Raleigh (Debra Watts by email) •
SWPS Raleigh (Sergei Chemikov by email)
William Miller, Altamont Environmental (by email)
Division of Water Quality J Aquifer Protection Section/Mooresville Regional Office One
610 East Center Avenue,Suite 301,Mooresville,North Carolina 28115 I•TprthCarolina
Phone:[phone] Fax:[phone] //
Internet www.ncwaterquality.org aturall
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