3620_DukeAllen_DewateringWellAbandonment_FID1891032_20240730

Moutos, Sarah
From:
Sent:
To:
Cc:
Subject:
Attachments:
Importance:
Follow Up Flag:
Flag Status:
Murphy, Courtney <[e-mail]>
Tuesday, July 30, 2024 7:43 PM
Moutos, Sarah
Russ, Jordan A; Stanley, Sherri; Witt, Kimberlee; Martin, Melonie Y; Hardin, Tyler; Houck,
Blane; Costner, Brandy F
[External] REQUEST FOR APPROVAL: Duke Energy-Allen-SSLF 3620-INDUS_Dewatering
System Well Abandonment
Duke Energy-Allen-SSLF 3620-INDUS_WL Monitoring Loc Fig_202407.pdf; Allen SSLF
Pilot Dewater Sys_RecWellPerm it_WS0300028_20221209.docx.pdf; Allen SSLF FullScale
Dewater Sys_RecWellPerm it_WS0300028_20230602_MOD.docx.pdf; Pilot EW_Well
Construction GW1_20230120.pdf, Allen SSLF Dewatering FullScale_EW GW1
_Aug2023.pdf
High
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Sarah —
Duke Energy is hereby requesting approval to abandon the wells associated with the SSLF dewatering system
that are within the SSLF footprint. The wells planned for abandonment are shown on the attached figure. I have
placed a red box around the symbols in the legend that represent wells associated with the SSLF dewatering
system and are part of the current planned abandonments. The eductor (extraction) wells will be abandoned per
15A NCAC 02C.0113. Specifically, the wells are planned to be abandoned via in -place tremie methods using a
flexible grout that qualifies as an allowable grout per the aforementioned regulation. As required by the SSLF
Permit (3620-INDUS-2022), a Licensed Geologist will oversee and certify the abandonments and copies of the
GW-30 Well Abandonment Forms will be submitted to the Section.
The vibrating wire piezometers (VWPZs) that are associated with the dewatering well system are already fully
grouted below ground surface by design, so abandonment of those locations will simply comprise removing their
surface instrumentation.
For reference, I've attached copies of the respective NCDEQ DWR Recovery Well Construction Permits (original
for pilot section and modified for full-scale expansion), as well as copies of the GW-1 Well Construction Forms for
the eductorwells.
The site and contractors are prepared to begin abandoning the wells associated with the SSLF dewatering
system within the next week or two, pending your approval.
If you have any questions or would like additional information, don't hesitate to reach out.
Thankyou,

Courtney Uh Murphy, PG
Lead Environmental Specialist
EHS Waste & Groundwater Programs
Courtney.Murphy(a)duke-energy.com
Office: 704.382.7171
Mobile: [phone]

Submission ID#
GW 1-2023-05987
Are you submitting a scanned form?* Yes
No
CONTACT INFORMATION
......... ......... ......... ............................
Email Address*
Contact Name* [e-mail]
William Keyes m
Is this a revision to the form you have previously submitted?
Yes No
WELL CONSTRUCTION INFORMATION
1. Who is installing these wells?*
Owner Well Contractor
1. Well Contractor Information:
Certiticate # Cert Level First Name Last Name Company Name
4220 A WILLIAM KEYES Griffin
2. Well Construction Permit #:
NA/ Private
List all applicable well construction permits (i.e. Monitoring Wells, UIC- Underground Injection Control, CCPCUA-Central Coastal Plain Capacity Use Area, County,
etc.)
What type of well is this?* Injection Well Non -Water Supply Well
Water Supply Well (includes irrigation wells)
3. Non -Water Supply Well* Monitoring
Recovery
4. Date well was completed and ID#
Date Well Completed* Well ID# Well Yield
8/18/2023 W 12 3
(gallons per minute)"

8/18/2023
W 13
3
(gallons per minute)"
8/18/2023
W 14
3
(gallons per minute)"
8/18/2023
W 15
3
(gallons per minute)"
8/18/2023
W 16
3
(gallons per minute)"
8/18/2023
W 17
3
(gallons per minute)"
8/18/2023
W 18
3
(gallons per minute)"
8/18/2023
W 19
3
(gallons per minute)"
8/18/2023
W20
3
(gallons per minute)"
8/18/2023
W21
3
(gallons per minute)"
8/18/2023
W22
3
(gallons per minute)"
8/18/2023
W23
3
(gallons per minute)"
8/18/2023
W24
3
(gallons per minute)"
8/18/2023
W25
3
(gallons per minute)"
8/18/2023
W26
3
(gallons per minute)"
8/18/2023
W27
3
(gallons per minute)"
8/18/2023
W28
3
(gallons per minute)"
8/18/2023
W29
3
(gallons per minute)"
8/18/2023
W30
3
(gallons per minute)"
8/18/2023
W31
3
(gallons per minute)"
8/18/2023
W32
3
(gallons per minute)"
8/18/2023
W33
3
(gallons per minute)"
8/18/2023
W34
3
(gallons per minute)"
8/19/2023
W35
3
(gallons per minute)"

8/18/2023
W36
3
(gallons per minute)"
8/18/2023
W37
3
(gallons per minute)"
8/18/2023
W38
3
(gallons per minute)"
8/18/2023
W39
3
(gallons per minute)"
8/18/2023
W40
3
(gallons per minute)"
5. Well Location
Facility/Owner Name*
Duke Energy Facility ID#
(Required) (If applicable)
County* Parcel Identification No. (PIN)
Gaston
*
Physical Address Street Address
Plant Allen Road
Address Line 2
City
State / Province / Region
Belmont
NC
Postal / Zip Code
Country
28012
US
Latitude* 35.1870732000
Longitude*-81.0153993000
Decimal degrees
Decimal degrees
6. Is(are) the well(s): * Permanent
Temporary
7. Is this a repair to an existing well: *
Yes No
If this is a repair, fill out known well construction information and explain the nature of the
repair under #21 remarks section or on the back of this form.
For multiple Geoprobe/DPT or Closed -Loop Geothermal Wells having the same construction, only 1 GW-1 is needed.
8a. Indicate TOTAL NUMBER of wells drilled:
9. Total well depth below land surface: (ft.)
70
For multiple wells list all depths if different
(example- 3@200' and 2@100')
10. Static water level below top of casing: (ft.)
17
If water level is above casing, use
9a. What is the depth of the casing from ground
surface?
in test
11. Borehole diameter:
8
in inches

12. Well construction method:
Auger Air Rotary
Direct Push Mud Rotary
Other
Cable Tool
Rotosonic
14. WATER BEARING/FRACTURE ZONES
From To Description
17 Medium Clay, Multiple sized gravel, coarse fractured bedrock
in fleet in feet
15. OUTER CASING (for multi -cased wells) OR LINER (if applicable)
From To Diameter Thickness Material
in feet in feet in inches
17. SCREEN
From To Diameter Thickness
A
in fee, teet in inche•<
18. GROUT
From To Material
0.00 10.00 Bentonite
in feet in feet
19. SAND/GRAVEL PACK (if applicable)
From To Material
2a filter sand
in feet in feet
20. DRILLING LOG
From
To
0.00
13.00
in feet
in feet
50.00
in feet
in feet
70.00
in feet
in feet
21. Remarks
Material
Emplacment Method & Amount
controlled pour
Emplacment Method
poured from surface
Description (color, hardness, soil/rock type, grain size, etc.)
orange clay/silts
tan/gray silts
partially weather rock
Dewatering system addition with 29 more wells all drilled the same depth and construction

22. Site diagram or additional well details:
You may upload additional well construction information here.
060123 Revised Preliminary Griffin SSLF Layout.pdf 9.46MB
pdf only
CERTIFICATION INFORMATION
* By signing this form, I hereby certify that the well(s) was (were) constructed in accordance with 15A NCAC 02C .0100 or
15A NCAC 02C .0200 Well Construction Standards and that a copy of this record has been provided to the well owner.
23. Certification
Signature of Certified Well Contractor

ROY COOPER
Govemar
ELIZABETH S. B1SER
Secretory
RICHARD E. ROGERS, JR.
birector
Courtney Murphy
Duke Energy Corporation
526 South Church Street
Charlotte, NC 28202
Dear Ms. Murphy,
(via email)
June 2, 2023
RE: Recovery Well Construction Permit
Permit # WS0300028
Duke Energy Carolinas, LLC
Allen Steam Station
253 Plant Allen Road, Belmont
Gaston County
In accordance with your completed permit modification application received on June 2, 2023, we are forwarding
herewith Water Supply Well Construction Permit No. WS0300028 dated June 2, 2023, issued to Duke Energy, for the
construction of a water supply well system with an increased design capacity of 290,000 gallons per day.
This Construction Permit covers the installation of an additional fifty-three (53) dewatering wells not to exceed a depth
of 70 feet below land surface (bls).
This Permit will be effective for one year from the date of issuance and shall be subject to the conditions and
limitations as specified therein.
Duke Energy should also verify with DWR's Complex Permitting Unit regarding coverage of the proposed additional
discharges to the active ash basin at the facility under NPDES Permit NC0004987.
Please note that, depending upon the volume of water withdrawn by the system per day, registration of the
withdrawal may be necessary at: https://www.ncwater.org/WUDC/app/WWATR/page.
Should you have any questions, please contact Edward Watson at [phone], or by email at
[e-mail].
Sincerely,
EA
DocuSigned by:
fw w N P:z>t.
F161F969A2D84A3...
Andrew H. Pitner, P.G. Regional Supervisor
Mooresville Regional Office
Water Quality Regional Operations Section
Division of Water Resources
CC: WQROS, Central Office & Regional Office Staff (via Laserfiche)
Griffin Dewatering (via email)
North Carolina Department of Environmental Quality I Division of Water Resources
Mooresville Regional Office 1 601 East Center Avenue, Suite 3011 Mooresville, NC 28115
NORTH CAROLINA ^ 704.663.1699
nep.m.m or �.n­l o..izllkla�

NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT FOR THE CONSTRUCTION OF A WATER SUPPLY WELL SYSTEM
(Wells or Well Systems with a design capacity of 100,000 Gallons Per Day or Greater)
In accordance with the provisions of Article 7, Chapter 87, North Carolina General Statutes, and other applicable Laws,
Rules, and Regulations.
PERMISSION IS HEREBY GRANTED TO
Duke Energy Carolinas, LLC
FOR THE CONSTRUCTION OF A WATER SUPPLY WELL SYSTEM consisting of fifty three (53) additional dewatering
wells owned by DUKE ENERGY and located at the subject site at 253 Plant Allen Road, Belmont, North Carolina. This
Permit is issued in accordance with the completed permit modification application received on June 2, 2023, in conformity
with specifications and supporting data, all of which are filed with the Department of Environmental Quality and are
considered integral parts of this Permit.
This Permit is for well construction only, and does not waive any provision or requirement of any other applicable law or
regulation. This Permit does not constitute approval of a site, for which the Public Water Supply Section may require
additional information or approval of the proposed volume of water to be withdrawn, within an area defined as a Capacity
Use Area, regulated by the Division of Water Resources.
Construction of any well under this permit shall be in strict compliance with the North Carolina Well Construction Regulations
and Standards (15A NCAC 02c .100), and other State and Local Laws and regulations pertaining to water supply well
construction.
If any requirements or limitations specified in this Permit are unacceptable, you have a right to an adjudicatory hearing upon
written request within 30 days of receipt of this Permit. The request must be in the form of a written petition conforming to
Chapter 150B of the North Carolina General Statutes and filed with the Office of Administrative Hearings, 6714 Mail Service
Center, Raleigh, North Carolina 27699-6714. Unless such a demand is made, this Permit is final and binding.
This Permit will be effective for one year from the date of its issuance and shall be subject to other specified conditions,
limitations, or exceptions as follows:
1. A well test for yield shall be conducted in accordance with 15A NCAC 02C .110(b) and the results of that test shall be
submitted to the Division of Water Resource's Mooresville Regional Office within 30 days of the test conclusions.
2. Each well shall have a Well Contractor Identification Plate and a Pump Installation Information Plate in accordance
with 15A NCAC 02C .0107Q) (2) and (3).
3. Well construction records (GW-1) for each well shall be submitted to the Division of Water Resources' Information
Processing Unit within 30 days of the well completion.
4. When the well is discontinued or abandoned, it shall be abandoned in accordance with 15A NCAC 02C .0113 and a
well abandonment record (GW-30) shall be submitted to the Division of Water Resources' Information Processing
Unit within 30 days of the well abandonment.
Permit issued the 2nd day of June 2023
FOR THE NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
DocuSigned by:
F161FB69A2D84A3...
Andrew H. Pitner, P.G., Regional Supervisor
Division of Water Resources
By Authority of the Environmental Management Commission
Permit No. # WS0300028
D ��� North Carolina Department of Environmental Quality i Division of Water Resources
Mooresville Regional Office 1610 East Center Avenue, Suite 301 1 Mooresville, North Carolina 28115
NOR;T aH aouNn
oenmm,am 0 �a onmi akr� /� 704.663.1699

ROY COOPER
Govemar
ELIZABETH S. B1SER
Secretory
RICHARD E. ROGERS, JR.
birecfnr
NORTH GAROLINA
EY1dMnnmMkff Q=W
December 9, 2022
Duke Energy Corporation (via email)
c/o Courtney Murphy
526 South Church Street
Charlotte, NC 28202
RE: Recovery Well Construction Permit
Permit # WS0300028
Duke Energy Carolinas, LLC
Allen Steam Station
253 Plant Allen Road, Belmont
Gaston County
Dear Ms. Murphy,
In accordance with your completed application received on December 9, 2022, we are forwarding herewith Water
Supply Well Construction Permit No. WS0300028 dated December 9, 2022, issued to Duke Energy, for the construction
of a water supply well system with a design capacity for 158,400 gallons per day.
This Construction Permit covers the installation of eleven (11) dewatering wells not to exceed a depth of 70 feet below
land surface (bls). This Permit will be effective for one year from the date of issuance and shall be subject to the
conditions and limitations as specified therein.
Duke Energy should also verify with DWR's Complex Permitting Unit regarding coverage of the proposed additional
discharges to the active ash basin at the facility under NPDES Permit NC0004987.
Please note that, depending upon the volume of water withdrawn by the system per day, registration of the
withdrawal may be necessary at: https://www.ncwater.org/WUDC/app/WWATR/page.
Should you have any questions, please contact Edward Watson at [phone], or by email at
[e-mail].
Sincerely,
EA
DocuSigned by:
#uw N P: 4kft
F161F969A2D84A3...
Andrew H. Pitner, P.G. Interim Regional Supervisor
Mooresville Regional Office
Water Quality Regional Operations Section
Division of Water Resources
CC: WQROS, Central Office (via Laserfiche)
DWR, MRO Staff (via email)
Griffin Dewatering (via email)
North Carolina Department of Environmental Quality I Division of Water Resources
Mooresville Regional Office 1 601 East Center Avenue, Suite 3011 Mooresville, NC 28115
NORTH CAROLINA ^ 704.663.1699
nep.m.m or �.n—1 o..izllkla�

NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT FOR THE CONSTRUCTION OF A WATER SUPPLY WELL SYSTEM
(Wells or Well Systems with a design capacity of 100,000 Gallons Per Day or Greater)
In accordance with the provisions of Article 7, Chapter 87, North Carolina General Statutes, and other applicable Laws,
Rules, and Regulations.
PERMISSION IS HEREBY GRANTED TO
Duke Energy Carolinas, LLC
FOR THE CONSTRUCTION OF A WATER SUPPLY WELL SYSTEM consisting of eleven (11) dewatering wells owned by
DUKE ENERGY and located at the subject site at 253 Plant Allen Road, Belmont, North Carolina. This Permit is issued in
accordance with the completed application received on December 9, 2022, in conformity with specifications and supporting
data, all of which are filed with the Department of Environmental Quality and are considered integral parts of this Permit.
This Permit is for well construction only, and does not waive any provision or requirement of any other applicable law or
regulation. This Permit does not constitute approval of a site, for which the Public Water Supply Section may require
additional information or approval of the proposed volume of water to be withdrawn, within an area defined as a Capacity
Use Area, regulated by the Division of Water Resources.
Construction of any well under this permit shall be in strict compliance with the North Carolina Well Construction Regulations
and Standards (15A NCAC 02c .100), and other State and Local Laws and regulations pertaining to water supply well
construction.
If any requirements or limitations specified in this Permit are unacceptable, you have a right to an adjudicatory hearing upon
written request within 30 days of receipt of this Permit. The request must be in the form of a written petition conforming to
Chapter 150B of the North Carolina General Statutes and filed with the Office of Administrative Hearings, 6714 Mail Service
Center, Raleigh, North Carolina 27699-6714. Unless such a demand is made, this Permit is final and binding.
This Permit will be effective for one year from the date of its issuance and shall be subject to other specified conditions,
limitations, or exceptions as follows:
1. A well test for yield shall be conducted in accordance with 15A NCAC 02C .110(b) and the results of that test shall be
submitted to the Division of Water Resource's Mooresville Regional Office within 30 days of the test conclusions.
2. Each well shall have a Well Contractor Identification Plate and a Pump Installation Information Plate in accordance
with 15A NCAC 02C .0107(j) (2) and (3).
3. Well construction records (GW-1) for each well shall be submitted to the Division of Water Resources' Information
Processing Unit within 30 days of the well completion.
4. When the well is discontinued or abandoned, it shall be abandoned in accordance with 15A NCAC 02C .0113 and a
well abandonment record (GW-30) shall be submitted to the Division of Water Resources' Information Processing
Unit within 30 days of the well abandonment.
Permit issued the 9th day of December 2022
FOR THE NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
[D—Sign,d by:
Fi �i r-aanaeeaaa. .
Andrew H. Pitner, P.G., Assistant Regional Supervisor
Division of Water Resources
By Authority of the Environmental Management Commission
Permit No. # WS0300028
D ��� North Carolina Department of Environmental Quality i Division of Water Resources
Mooresville Regional Office 1610 East Center Avenue, Suite 301 1 Mooresville, North Carolina 28115
NOR;T aH aouNn
oenmm,a � 0 �a onmi akr� /� 704.663.1699

Submission ID#
G W 1-2023-00350
Are you submitting a scanned form?* Yes
No
CONTACT INFORMATION
........................................................................__.. .........................
Email Address*
Contact Name* [e-mail]
Will Keyes m
Is this a revision to the form you have previously submitted?*
Yes No
WELL CONSTRUCTION INFORMATION
1. Who is installing these wells?*
Owner Well Contractor
1. Well Contractor Information:
Certiticate # Cert Level First Name Last Name Company Name
4220 A WILLIAM KEYES Griffin Dewatering
2. Well Construction Permit #:
NA/ Private
List all applicable well construction permits (i.e. Monitoring Wells, UIC- Underground Injection Control, CCPCUA-Central Coastal Plain Capacity Use Area, County,
etc.)
What type of well is this?*
Injection Well Non -Water Supply Well
Water Supply Well (includes irrigation wells)
3. Non -Water Supply Well*
Monitoring
Recovery
4. Date well was completed and
ID#
Date Well Completed*
Well ID# Well Yield
12/22/2022
EW-1 3
(gallons per minute)"

12/22/2022
EW-2
3
(gallons per minute)'
12/22/2022
EW-3
3
(gallons per minute)'
12/22/2022
EW-4
3
(gallons per minute)'
12/22/2022
EW-5
3
(gallons per minute)'
12/22/2022
EW-6
3
(gallons per minute)'
12/22/2022
EW-7
3
(gallons per minute)'
12/22/2022
EW-8
3
(gallons per minute)'
12/22/2022
EW-9
3
(gallons per minute)'
12/22/2022
EW-10
3
(gallons per minute)'
12/22/2022
EW-11
3
(gallons per minute)'
5. Well Location
Facility/Owner Name*
Duke Energy Facility ID#
(Required) (If applicable)
County* Parcel Identification No. (PIN)
Gaston
Physical Address* Street Address
Plant Allen Road
Address Line 2
City State / Province / Region
Belmont NC
Postal / Zip Code Country
28012 us
Latitude* 35.1870732000 Longitude*81.0153993000
Decimal degrees Decimal degrees
6. Is(are) the well(s): * Permanent Temporary
7. Is this a repair to an existing well: * Yes No
If this is a repair, fill out known well construction information and explain the nature of the
repair under #21 remarks section or on the back of this form.
For multiple Geoprobe/DPT or Closed -Loop Geothermal Wells having the same construction, only 1 GW-1 is needed.
8a. Indicate TOTAL NUMBER of wells drilled: 11

9. Total well depth below land surface: (ft.)
70
For multiple wells list all depths if different
(example- 3@200' and 2@100')
10. Static water level below top of casing: (ft.)
23
If water level is above casing, use
12. Well construction method:
Auger Air Rotary
Direct Push Mud Rotary
Other
9a. What is the depth of the casing from ground
surface?
30
in feet
11. Borehole diameter:
n inches
14. WATER BEARING/FRACTURE ZONES
From To Description
fine grained silts/ weathered structuring/ Clay
rl k_cJ in feet
15. OUTER CASING (for multi -cased wells) OR LINER (if applicable)
From To Diameter Thickness Material
in feet in fee, it-, inches
Cable Tool
Rotosonic
17.SCREEN
From To Diameter Thickness Material
4.00 Schd 40 PVC
in 10et n t:ei in inches
18. GROUT
From To Material
in feet in feet
19. SAND/GRAVEL PACK (if applicable)
From To Material
#1a sand
in feet in fact
20. DRILLING LOG
From
To
0.00
20.00
in feet
in feet
20.00
50.00
in feet
in feet
r
70.00
n *eet
in feet
Emplacment Method & Amount
Emplacment Method
poured from surface
Description (color, hardness, soil/rock type, grain size, etc.)
orange clay/silts
tan/gray silts
partially weather rock
21. Remarks

Twin pipe eductor wells inside 4" wells
Dewatering system pilot test
22. Site diagram or additional well details:
You may upload additional well construction information here.
121222 - SSLF Pilot Test - Layout.pdf 152.6KB
pdf only
CERTIFICATION INFORMATION
* By signing this form, I hereby certify that the well(s) was (were) constructed in accordance with 15A NCAC 02C .0100 or
15A NCAC 02C .0200 Well Construction Standards and that a copy of this record has been provided to the well owner.
23. Certification
Alm
Signature of Certified Well Contractor

411 presure and 6"
return HDPE
Twin Pipe
Eductors at
+/-30ft OC
GRIFFIN DEWATERING L.L.C.
5306 CLINTON DRIVE
HOUSTON, TX 77020
TEL: [phone]
If FAX: [phone]
GFi1FFIN EMAIL:[e-mail]
WEBSITE: www.griffindewatering.com
Eductor Pump Station
with 60HP electric jet
pump and Diesel Standby
QJ U Qj QJ UO
O
0
0
2" Piezometers at 10ft,
20ft, 50ft, 100ft, and
200ft from pilot test
-50ft deep
-6" to 8"d i a m ete r
borehole
-Installed on side of
test closest to SSLF
excavation
REV. I DESCRIPTION I DATE I BY I APPVD.
This drawing is the property of Griffin Dewatering Corporation and its associated companies and is intended only for its sole or authorized use. It may
contain proprietary, public or authorized third party information. Any alteration of this drawing is prohibited, without the express, written consent of an
authorized representative of Griffin Dewatering Corporation
Each Eductor will be:
-70ft deep
-8" diameter borehole
-4" PVC Screen and
Casing with 40ft of 20
slot screen
4" HDPE to
discharge
location
Duke Energy DRAWN
Allen Closure SCALE:
Gaston County, GA I DATE
SSLF - Pilot Test Layout I DWG:
ML
NTS
12/12/22
1