1812_DukeMarshall_ILF Phase 3 Piezometer Abandonment Request_FID1741362_20221024

(' DUKE
ENERGY-.
October 24, 2022
North Carolina Department of Environmental Quality
Division of Waste Management
Solid Waste Section
2090 U.S. Highway 70
Swannanoa, NC 28778
Attn: Ms. Sarah Moutos (submitted electronically)
Re: Request for Approval to Abandon Piezometer
Industrial Landfill No.1 - Phase 3
Permit No.: 1812-INDUS-2008
Marshall Steam Station
Terrell, North Carolina 28682
Dear Ms. Moutos:
526 South Church St.
Charlotte, NC 28202
Mailing Address
P.O. Box 1006
Mail Code EC 13K.
Charlotte, NC 28201-1006
To progress site closure activities, Duke Energy requests approval to abandon Industrial Landfill No.1 (1812-
INDUS; ILF) Phase 3 piezometer CLF-303, located within the ash basin excavation area. The attached Site
Vicinity Plan (Figure 1) has the piezometer requested for abandonment circled.
This piezometer was installed in May 2021 to support the Geotechnical Investigation for ILF Phase 3. To date
26 rounds of manual water level measurements have been collected from this piezometer, in addition to having
transducer data available between August 2021 and October 2022. Additionally, Phase 3 piezometer CLF22-
306, located nearby and northwest of CLF-303, is expected to remain installed and continued to be monitored
at this time.
Abandonment of the piezometer will be supervised by qualified geotechnical field support that is under the
direct supervision of and in contact with a Licensed Geologist. The piezometer will be abandoned by a North
Carolina licensed well contractor in accordance with subchapter 02C of the North Carolina Administrative
Code. Duke Energy will provide well abandonment logs to the Division upon completion of the field work.
If you need additional information regarding this request do not hesitate to email or call me at
Ashley. Healy(cDduke-energy.com or [phone].
Respectfully submitted,
j4VAi
Ashley Healy, P.G.
Environmental Services
Attachments: Site Vicinity Plan (AECOM, February 2022)
cc (via e-mail): Claire Osborn, NCDEQ
Sherri Stanley, NCDEQ
Ed Mussler, NCDEQ
Scott Saunders, Duke Energy
Chris Varner, Duke Energy
www.duke-energy.com Page 1 of 2

Tyler Hardin, Duke Energy
Kim Witt, Duke Energy
Ed Sullivan, Duke Energy
www.duke-energy.com Page 2 of 2

2 3 4 5 6 7 8 FIGURE 1 REV. 0
LEGEND
--830-- EXISTING MAJOR TOPOGRAPHIC CONTOUR
EXISTING MINOR TOPOGRAPHIC CONTOUR
7.711
ASH BASIN WASTE BOUNDARY (APPROXIMATE)
_ _ - - M-ss--� __--_______--_-_-_-_ __ -_ _ \ - - - - EXISTING SITE FEATURE (APPROXIMATE)
Mi56_,- -____ -� `_ __�� �_ � / (/" S&ME PIEZOMETER LOCATION
PROPOSED INDUSTRIAL LANDFILL (ILF) AND PHASE
__________ __ BOUNDARY (APPROXIMATE) _� � _____ �____________ _--�--___ \M-62;`:. :\ - `` _: _" `\ ❑ S&ME VANE SHEAR TEST LOCATION
\ ' i0 GWA-85/D PROPERTY BOUNDARY
N, ;
- ))iil11/lIrl flr'�lll�r i,l ''/l` 1 1°` ��i'/ �'' I 1` \ `+ EXISTING PIEZOMETER LOCATION Q S&ME CONE PENETRATION TEST LOCATION
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,� Y 0 PROPOSED PIEZOMETER LOCATION (2022) DUKE ENERGY BORING LOCATION
ri/ / / -'�%l_ \\\ \ �\`�\`\ ` \\� �\\\ �`�/!% "'�.. 4 •_� ---, �_-,� -`-_-__ A INDUSTRIAL LANDFILL i1iIt
ABANDONED PIEZOMETER LOCATION
PERMIT NO. 1812� , SOIL BORING LOCATION (SYNTERRA
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TER MAP
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