GW_BTV_CoverLetter_20200330

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March 30, 2020
North Carolina Department of Environmental Quality
Division of Water Resources
Attn: Mr. Ted Campbell
Asheville Regional Office
2090 U.S. 70 Highway
Swannanoa, North Carolina 28778-8211
Subject: Asheville Updated Groundwater Background Threshold Values
Dear Mr. Campbell:
526 South Church Street
Charlotte, NC 28202
Mailing Address:
PO Box 1006
Mail Code EC13K
Charlotte, NC 28201-1006
980 373 6636
Duke Energy Progress, LLC (Duke Energy) submits enclosed the updated background groundwater
dataset through October 2019 for the Asheville Steam Electric Plant (Asheville). These data were
used to calculate updated background threshold values (BTVs) for groundwater. The calculations
were completed consistent with the "Statistical Methods for Developing Reference Background
Concentrations for Groundwater and Soil at Coal Ash Facilities" dated May 2017 and prepared
under the guidance of the North Carolina Department of Environmental Quality (NCDEQ) by HDR
Engineering, Inc. and SynTerra Corporation.
If you have any questions or need any clarification regarding the information provided, feel free to
contact me at [e-mail] or at [phone] at your convenience.
Respectfully submitted,
L. Bryson S.
Allison
L. Bryson S. Allison, P.E.
Environmental Services
Duke Energy
Digitally signed by L. Bryson S.
Allison
Date: 2020.03.30 11:48:50-04'00'
Attachments: Asheville Updated Background Threshold Values for Constituent Concentrations in
Groundwater
cc (via email): Eric Smith and Steve Lanter— DEQ Central Office
Landon Davidson — NCDEQ Asheville Regional Office
Ed Sullivan, Scott Davies, Tyler Hardin, and John Teopfer — Duke Energy
Grant Barrier—SynTerra