3620_DukeAllen_SSLF_PZ Install Request_FID1663936_20220405

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April 5, 2022
North Carolina Department of Environmental Quality
Division of Waste Management
Solid Waste Section
1646 Mail Service Center
Raleigh, North Carolina 28778
Attn: Ms. Sarah Moutos (submitted electronically)
Re: Four Additional Piezometer Installations
Allen South Starter Landfill (SSLF)
Permit No.: 3620-INDUS
Allen Steam Station
Gaston County, North Carolina
Dear Ms. Moutos,
526 South Church Street:
Mail Code EC13K
Charlotte, North Carolina 28202
704-382-7171
Duke Energy Carolinas (Duke Energy) requests approval from the Division of Waste Management
(Division) for the installation of four piezometers within the footprint of the proposed South Starter Landfill
(SSLF) (Permit No. 3620-INDUS) located at the Allen Steam Station in Gaston County, North Carolina.
These four proposed additional piezometers as shown on the attached Figure 1 are considered to be
supplemental and temporary features to better characterize the groundwater levels within the footprint of
the SSLF to support a groundwater vertical separation demonstration as requested in North Carolina
Department of Environmental Quality (NCDEQ) Division of Waste Management (DWM) Solid Waste
Section (the Section) letter dated July 26, 2021.
The attached Figure 1, prepared by SynTerra on behalf of Duke Energy, depicts proposed piezometer
locations. Actual locations will be determined based on field conditions and approved by Duke Energy
and a North Carolina Licensed Geologist.
Installation of these additional piezometers will be supervised by a North Carolina Licensed Geologist or
qualified geological field support that is under the direct supervision of and in contact with a North
Carolina Licensed Geologist. Piezometers will be installed by a North Carolina licensed well contractor in
accordance with subchapter 02C of the North Carolina Administrative Code. Duke Energy will provide
boring logs and well construction records (GW-1 forms) to the Section upon completion of piezometer
installation.
If you need additional information regarding this request do not hesitate to email or call me at
Courtney.Murphy(a)duke-energy.com or [phone].
Respectfully, dw�w-*Oh�
Courtney W. Murphy, P.G.
Environmental Services
Attachments: Figure 1 — South Starter Landfill (3620-INDUS) Planned Piezometers (SynTerra, March 2022)
www.duke-energy.com Page 1 of 2

cc (via e-mail): Jordan Russ, NCDEQ
Claire Osborne, NCDEQ
Steve Pulley, Duke Energy
Tyler Hardin, Duke Energy
Ashley Healy, Duke Energy
Henry Duperier, Duke Energy
Scott Kalau, Duke Energy
www.duke-energy.com Page 2 of 2

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LEGEND
C PLANNED PIEZOMETER
EXISTING MONITORING WELL
SOUTH STARTER LANDFILL BOUNDARY
ACTIVE ASH BASIN WASTE BOUNDARY
RETIRED ASH BASIN WASTE BOUNDARY
RETIRED ASH BASIN ASH LANDFILL WASTE
BOUNDARY
DORS FILLS BOUNDARIES
- DUKE ENERGY CAROLINAS PROPERTY LINE
STREAM (AMEC NRTR 2015)
WETLAND (AMEC NRTR 2015)
4T
r
NOTES:
1. PROPOSED PIEZOMETER LOCATIONS ARE DEEMED APPROXIMATE AND FINAL LOCATIONS
WILL BE DETERMINED DURING FIELD IMPLEMENTATION.
2. THE WATERS OF THE US HAVE NOT BEEN APPROVED BY THE US ARMY CORPS OF ENGINEERS
AT THE TIME OF THE MAP CREATION. THIS MAP IS A PRELIMINARY JURISDICTIONAL
DETERMINATION ONLY. THE WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM
AMEC FOSTER WHEELER ENVIRONMENTAL & INFRASTRUCTURE, INC. NATURAL
RESOURCE TECHNICAL REPORT FOR ALLEN STEAM STATION DATED MAY 29, 2015.
3. ALL BOUNDARIES ARE APPROXIMATE.
4. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
5. AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON DECEMBER 13, 2018.
AERIAL WAS COLLECTED ON MARCH 30, 2018.
6. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM FIPS 3200 (NAD83).
GRAPHIC SCALE
250 G500
FIGURE 1
(IN FEET) SOUTH STARTER LANDFILL (3620-INDUS)
DRAWN BY: B. MCGANN DATE: 09/28/2020 PLANNED PIEZOMETERS
REVISED BY: B. MCGANN DATE: 03/24/2022 ALLEN STEAM STATION
CHECKED BY: L. DRAGO DATE: 03/24/2022
APPROVED BY: L. DRAGO DATE: 03/24/2022 GASTON COUNTY, NORTH CAROLINA
PROJECT MANAGER: C. SUTTELL