20150998 Ver 1_401-404 Scoping Meeting Request_20150914

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�+'�► North Carolina Department of Environment and Natural Resources
NCDENR. SCOPING MEETING REQUEST
Please complete all the information below. Call and Email the appropriate coordinator with the completed form.
• Asheville Region - Alison Davidson 828 - 2964698; alison.davidson(a.ncdenr..gov
• Fayetteville /Raleigh Region - David Lee 919 - 791 -4203; david.lee(a.ncdenr..aov
• MooresvilleMinston Salem - Patrick Grogan 704 - 235 -2107, patrick.grogan(cbncdenr..c�ov
• Washington Region - Lyn Hardison 252 - 948 -3842; lvn.hardison(c ncdenr.gov
• Wilmington Region -Cameron Weaver 910 - 796 -7303; cameron.weaverna.ncdenr.gov
Project Name: L.V. Sutton Energv Complex County: New Hanover
Applicant: Steve Cahoon Company: Duke Enerqv
Address: 410 S. Wilmington Street City: Raleigh State: NC Zip: 27601
Phone: 919 - 546 -7457 Fax: Email: steve.cahoon(a)duke- energv.com
Physical Location of Project: L.V. Sutton Enerqv Complex
Sutton Steam Plant Road,
Wilmington, NC 28401
Engineer /Consultant: Thomas Bristol Company: Geosvntec Consultants of NC PC
Address: 1300 South Mint Street, Suite 410 City: Charlotte State: NC Zip: 28203
Phone: 803 - 724 -3266 Fax: Email: tbristol(a)geosvntec.com
Please provide a DETAILED proiect narrative, pdf site plan and a vicinity map with road names along with this Request form.
The project narrative should include the following when available:
Existing Conditions- List of existing permits, previous project name(s) or owner name(s), existing compliance or pollution incidents, current
conditions or development on site, size of tract, streams or wetlands on site *, stream name and classification, historical significance of
property, seasonal high water table elevation, riparian buffers, areas of environmental concern, setbacks
*Relative To Wetlands — Federal and coastal wetlands must be delineated by a US Army Carps Regulatory Official, Coastal Management
Field Rep or a qualified environmental consultant prior to undertaking work such as filling, excavating or land clearing. The delineations
must be approved by the US Arm Carps of Engineers (USA CE) and /or the Division of Coastal Manapernent. Wetland delineations are valid
for a period not to exceed five years frorn date of USACE approval.
Proposed- Full scope of project with development phase plan, acreage to be disturbed, wetlands to be disturbed, waste treatment & water
supply proposed, soils report availability, % impervious surface, stormwater treatment and number of bmps, public or private funding.
I IVease Ilpiro de gxtiiu xted iiinvextirneint & exllpe to eii-q lbyrneint unuii-Wlbeirx�,
New 6)s
For the scoping meeting, it is best to provide a list of questions and topics of concern. It is helpful to know what you hope to gain
from the meeting. Please have thoughts and presentations organized as much as possible to make the best use of time.
Agencies Involved: Check all agencies that may be involved with project:
❑ Marine Fisheries ❑ National Marine Fisheries ❑ U.S. Fish & Wildlife ❑ Wildlife Resources
® Coastal Management ❑ DEMLR 0 Stormwater) ® U.S. Army Corps of Engineers ❑ Shellfish Sanitation
®Water Resources: (® 401 /buffer, ❑ NPDES, ❑ Aquifer Protection) ❑ Public Water Supply
❑ Air Quality ® Solid Waste
NCDENR Scoping Meeting
October 2013
❑ UST ❑ Other ❑ Other ❑ Other

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Project Narrative — Coal Ash Management Act (CAMA) mandated CCR Basin Closure and
On -site Landfill Project
LV Sutton Steam Station
Wilmington, NC
Project Purpose and Need
Duke Energy Progress, LLC (Duke Energy) is required by the 2014 Coal Ash Management
Act (CAMA) Section 3(b), to close LV Sutton Coal Combustion Residual (CCR) surface
impoundments in accordance with CAMA Section 3(c) by 1 August 2019. Duke Energy
submitted a Coal Ash Excavation Plan to the North Carolina Department of Environment and
Natural Resources (NCDENR) on 13 November 2014 describing CCR removal plans
beginning with removing ash to an off -site location while simultaneously developing an on-
site landfill to meet the CAMA mandated closure date. The purpose and need of the project
as proposed is the permitting, construction and operation of an on -site landfill at the L.V.
Sutton Steam Station (Sutton) for the disposal of approximately 7.14 million tons of CCR
material resulting from the excavation and closure of the 1971 and 1984 Basins and LOLA.
Proposed Location and Site Plan
Sutton is located in New Hanover County, approximately 4.5 miles north of the city of
Wilmington in North Carolina (Figure 1) and is situated between the Cape Fear River to the
west and the Northeast Cape Fear River to the east. The Sutton Plant operated as a three -
unit, 575 - megawatt coal -fired plant from 1954 until retirement in 2013. Upon retirement of
the coal -fired station, a new 625- megawatt gas- fired, combined -cycle facility began
operating. The coal -fired units at Sutton are currently undergoing decommissioning and
demolition.
There are two CCR basins located at Sutton: (i) the 1971 Basin and (ii) the 1984 Basin
(Basins). The approximate areas of the 1971 Basin and the 1984 Basin are approximately
54 and 82 acres (ac), respectively. The Basin locations are shown on Figure 2. The 1971
Basin was operated from 1971 to 1985 and temporarily in 2011. The 1984 Basin was
operated from 1984 to 2013. Both basins contain fly ash, bottom ash, boiler slag, storm
water, ash sluice water, coal pile runoff, and low volume wastewater. Scrubbers were not
installed at the Sutton Plant; therefore, Flue Gas Desulphurization (FGD) residuals are not
expected to be found in the CCR basins. Other notable features at the site include: (i) the
Lay of Land Area (LOLA), located south of the 1971 Basin (ii) the Cooling Pond (also referred
to as Lake Sutton), declared waters of the State on 7 November 2014; and (iii) a discharge
canal that conveys water from the plant to the Cooling Pond. Investigations conducted within
LOLA indicate that the area contains a mixture of CCR and soil; therefore, Duke plans to
excavate the material from LOLA and dispose of it in the proposed onsite CCR landfill along
with CCR excavated from the Basins. The proposed landfill will be located east of the Basins
and LOLA, on the existing site as depicted in Figure 2, and described in further detail in the
following section.

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roject Narrative: LV Sutton Steam Stations o1uuu �u,o�
Coal Ash Management Act (CAMA) mandated CCR Basin Closure ENERGY,
and On -site Landfill Project PIRO(;;JR "?r`"
Project Activities Description
After obtaining necessary permits and approvals, anticipated landfill construction activities
and basin closure includes:
• Modifying existing rail spur and constructing rail car loading facility for initial off -site
CCR transport;
• Installing erosion and sediment control measures and stormwater management
infrastructure;
• Constructing the landfill liner system including:
• Earthwork: excavation and fill to construct liner system subgrade, perimeter
berm /roadways, and storm water management infrastructure (e.g., channels
and surface water basins);
• Double liner system construction including (from top to bottom) a 24 -in thick
protective cover layer, primary geocomposite drainage layer, primary
geomembrane, secondary geocomposite drainage layer, secondary
geomembrane, geosynthetic clay liner, and a 12 -in thick compacted soil
layer;
• Leachate collection and removal system construction including connection to
on -site storage facility to allow leachate management;
• Providing power connections to operate leachate collection systems;
• Building haul roads (soil) to support liner system construction and perimeter
roads (aggregate) to support landfill operations;
• Implementing the approved Landfill Groundwater Monitoring Plan;
• Removal of CCR from the basins and filling the landfill with ash placed in compacted,
controlled, and monitored lifts;
• Earthwork excavation and fill to grade stockpile and CCR storage areas to proposed
final grades followed by stabilization by establishing permanent vegetation;
• Closing the landfill by constructing a final cover system including (from top to bottom)
a 6 -in thick vegetative cover, 18 -in thick protective layer, geocomposite drainage
layer, and geomembrane;
• Closing the basin areas including removal of some areas of the dikes, fill, grading,
and stabilization; and,
• Providing post - closure operations, maintenance, and care.
A phased erosion and sediment control plan has already been prepared and submitted as
part of the landfill application package. The erosion and sediment control plan was prepared
to meet applicable local and state regulations and includes: (i) temporary erosion control
measures (sediment basins, stone filters terraces, sediment fences, etc.); (ii) permanent
erosion control measures (rip rap, energy dissipaters, ditch stabilization, pipe drain, etc.); and
(iii) seeding specifications and schedules.
Closure of the CCR surface impoundments will require design and installation of erosion and
sediment control devices to properly address potential sources of erosion and sedimentation
associated with excavation and grading activities. Protective measures may include
temporary diversion channels, sediment fencing, sediment basins, riprap slope or ditch
protection, and other applicable measures. The erosion and sediment control plan will be
4

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roject Narrative: LV Sutton Steam Stations o1uuu �u,o�
Coal Ash Management Act (CAMA) mandated CCR Basin Closure ENERGY,
and On -site Landfill Project PIRO(;;JR "?r`"
prepared with consideration to staging of activities, with erosion and sediment control devices
designed specifically for the activities underway at any given time.
Project Compatibility with Laws and Regulations
A Site Suitability Report has been prepared and submitted to NCDENR as part of the
proposed onsite CCR landfill application. Site suitability was approved on 2 July 2015. The
proposed landfill project is compatible with local, state, and federal laws and regulations.
The proposed landfill will be permitted through the NCDENR Solid Waste Section in
accordance with the applicable landfill requirements under Title 15A, Chapter 13, Subchapter
B, Sections .0500 and .1600. Furthermore the proposed landfill will be compatible with
location restrictions and design criteria defined by the 2014 CAMA and Federal CCR Rules
published April 17, 2015.
Permitting
The Solid Waste Section is the lead permitting agency and permits include:
Letter of Site Suitability (received on 2 July 2015)
Permit to Construct (application currently under review by NCDENR)
Permit to Operate
Other permits will be required for basin closure and landfill construction and operations
including:
• Local zoning consistency
• Modification of station industrial stormwater NPDES permits
• Sanitary sewer connection permits
• Erosion and sediment control permits
• Wetlands 401 & 404 permits
• Dam decommissioning
Identification of Environmental Features
Wetlands:
• Six isolated wetland areas were identified and delineated within the proposed landfill
footprint. There is no apparent nexus of these wetlands to the cooling pond or other
waters of the US. The total area of the wetlands is 6.57 acres (see Figure 3A).
Impact to these wetlands would be required to facilitate landfill construction in support
of the CAMA mandated closure at Sutton.
• Wetlands areas have been identified adjacent to the basin dikes and cooling pond.
The wetland area is approximately 3.8 acres (see Figure 3A). These wetlands would
be impacted to facilitate excavation of CCR material and basin closure for compliance
with CAMA.
3

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roject Narrative: LV Sutton Steam Stations o1uuu �u,o�
Coal Ash Management Act (CAMA) mandated CCR Basin Closure ENERGY,
and On -site Landfill Project PIRO(;;JR, "?r`"
There are wet areas within the basins and LOLA. These areas were not delineated as
wetlands as the soils are primarily CCR waste and do not meet hydric soil indicator
requirements. Geosyntec anticipates that these areas would be exempt from 404/401
permitting as they occur within waste disposal / treatment areas.
Further avoidance and minimization for impacts to the areas listed above are not
feasible if compliance with CAMA mandate for CCR basin closure is to be achieved.
• A site -wide wetland delineation has been performed and a jurisdictional determination
request submitted to the Army Corp of Engineers.
Streams and Rivers:
• No streams were identified on the project site. There will be no impacts to streams.
• The Cape Fear River is located adjacent to the project site to the west. There will be
no impacts to the Cape Fear River.
Lakes and Ponds:
• The Sutton Plant cooling water pond and discharge canal are located adjacent to the
CCR basins.
Removal and closure the CCR basins will include decommissioning and removal of
portions of the basin dikes and will result in the expansion of the cooling water pond
after the CCR has been removed (see Figure 313).
Floodplain:
• The proposed landfill footprint is not located in the 100 -year floodplain, as shown in
Figure 4.
Threatened and Endangered Species:
A Threatened and endangered species habitat survey has been completed and
agency consultations have been conducted. The USFWS responded that and there
are no anticipated impacts to threatened or endangered species or their habitat.
DENR Office of Land Stewardship responded with a list of species records from the
NCNHP database.
Cultural Resources:
• The project will not impact historical or cultural resources based on consultation
received from SHPO.
State Parks and Recreation Areas:
• Game Management Area is located to the west of the proposed site. The site
proposed for the on -site landfill is not located within the Game Management Area.
The current CCR units are located directly adjacent to the cooling pond and
Management Area. Relocating the CCR further from the pond would be beneficial to
this area.
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roject Narrative: LV Sutton Steam Stations o1uuu �u,o�
Coal Ash Management Act (CAMA) mandated CCR Basin Closure ENERGY,
and On -site Landfill Project PIRO(;;JR "?r`"
• The project will not impact State Parks or Recreational areas. Consultation has been
received from DENR Division of Parks and Recreation.
Land Use:
• Final land use will be consistent with current adjacent land uses.
Mitigation
• A mitigation plan will be developed as needed through the CWA Section 404 and 401
permitting process and will include coordination with USACE and NCDENR for
permitting and mitigation of unavoidable wetlands impacts for which mitigation would
be required.
Final closure plans under development for the Basins and LOLA would include
decommissioning and removal of some of the basin dikes and will result in the
expansion of the cooling water pond after the CCR has been removed. The closure
will replace the basins with natural areas and would provide expansion of open water
from the Cooling Pond (Lake Sutton), transitional wetland areas, and upland habitat
(see Figure 3B). This plan will result in a net gain to waters and wetlands and
ecological benefit.
List of Figures:
Figure 1 Site Location Map
Figure 2 Site Vicinity Map
Figure 3a Draft Site Development Plan
Figure 3b Conceptual Basin Closure Plan
Figure 4 FEMA Floodplain Map
5

Legend
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, Existing Basins
Property Boundary
Cooling Pond
Proposed Landfill Footprint
0.75 0.375 0 0.75 1.5 Miles
SITE TOPOGRAPHIC MAP
L.V. SUTTON CCR LANDFILL
L.V. Sutton Energy Complex
Wilmington, North Carolina
DUKE
Geosyntec
Notes V" E Y Figure
1. Basemap Source: Copyright:© 2013 National Geographic Society, consultants F R ° "` R
i -cubed
Charoltte, NC August 2015

Legend
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, Existing Basins
Property Boundary
Cooling Pond
Proposed Landfill Footprint
Notes
1. Basemap Source: Source: Esri, DigitalGlobe, GeoEye, i- cubed,
USDA, USGS
0.4 0.2 0 0.4 0.8 Mile
SITE VICINITY MAP
L.V. SUTTON CCR LANDFILL
L.V. Sutton Energy Complex
Wilmington, North Carolina
Geosyntec °� DUKE �;u ��" ' ENE Y Figure
consultants PR x< t I 'SS
2
Charoltte, NC August 2015

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LEGEND NOTES:
pE -- PROPERTY BOUNDARY FEMA FLOOD ZONE AE (NOTE 7) 1. COORDINATES ARE BASED ON NORTH CAROLINA STATE PLANE GRID SYSTEM, NAD83.
w
ELEVATIONS ARE BASED ON NAVD88.
fs -- --' -- EXISTING GROUND ELEVATION 3 FEMA FLOOD ZONE X (NOTE 7)
o CONTOURS IN OBSCURED AREAS (NOTE 1, 2, AND 4) ^ „m� „m........ ^ .............. ^... ".......- WETLANDS - NATIONAL WETLAND INVENTORY 2 IMAGERY COELEICT D ON 17 APRIL 2I014.ADATA PROVIDED WHERE CLEAR AND MAPPING SABLE ON
REV DATE DESCRIPTION URN APP
- - - -- ) (�.. eosynte
NOTE 8 THE IMAGERY IS WITHIN 2' OF ITS TRUE POSITION. gyp.
CONTOURS IN OPEN AREAS NOTE 1 AND 2 .;�� � { NI �g Pr
^.S WETLANDS- SURVEYED(NOTE 9) 3. IS BASE ON UTILITIES AND IS AFRO WHETHER PUBLIC OR PRIVATE, (b� mT��l)TNI ID
- -- AERIAL MAPPING LIMIT (NOTE 6) R BASED ON PHOTOG VERIFY LOCH MAPPING AND C APPROXIMATE. IT IS THE USERS N /yy�H„,,,,,„ „�i LL ip.
i HAND AUGER RESPONSIBILITY TO VERIFY LOCATION PRIOR TO COMMENCEMENT OF ANY DESIGN ORxSlllBroaC:B:mu' OF NC, PC '�IWfIIMI' IEp,
- - DRAINAGE CENTERLINE (NOTE 2) CONSTRUCTION.
a A CO NE PENETRATION TEST 13MSOUTHMINTSTRE ,5UITE410 t1 4I D\�R I,., ��,
4. DASHED CONTOURS AND ESTIMATED SPOT ELEVATIONS SHOWN IN OBSCURED AREAS ARE 0 300' 600' CHARLOTTE, NO 28203 USA
S FENCE LINE (NOTE 2)
{p SEISMIC CONE PENETRATION TEST COMPILED FROM LIMITED MATT ON SHOW IN DATA DUE R CONDITIONS DURING THE 17 �, ®� PHONE: t0a.22].ob4-0
GRAVEL / DIRT PATH (NOTE 2) APRIL 2014 FLIGHT. INFORMATION SHOWN IN OBSCURED AREAS ARE FOR REFERENCE SCALE IN FEET TITLE:
A GE0.PROBE ONLY. DRAFT SITE DEVELOPMENT PLAN
4 ,. SPOT ELEVATION (NOTE 1, 2, AND 4)
d� BORING 5, CONTOURS SHOWN UNDERWATER ARE FROM BATHYMETRIC SURVEYS CONDUCTED BY
SPOT ELEVATION ESTIMATED WSP IN JUNE 2014. PROJECT- CONSTRUCTION PERMIT APPLICATION DRAWINGS
IN OBSCURED AREAS (NOTE I, 2, AND 4) ■ PIEZOMETER 6. CONTOURS SHOWN OUTSIDE THE AERIAL MAPPING LIMIT ARE FROM A LIDAR SURVEY
z TREE /BRUSH LINE (NOTE 2) MONITORING WELL DATED APRIL 2007 OBTAINED FROM THE NORTH CAROLINA DOT GIS WEBSITE. CONTOURS
ONSITE CCR DISPOSAL FACILITY
AND TOPOGRAPHY WITHIN THE AERIAL MAPPING LIMIT WERE OBTAINED FROM AN AERIAL SHE
w SURVEY DATED MARCH 2015 (FLOWN 17 APRIL 2014) AND WERE OBTAINED FROM WSP. L.V. SUTTON ENERGY COMPLEX
(NOTE NE 2AND UTILITIES /STRUCTURES /OBJECTS O WATER SUPPLY WELL
s F ZAN03) ® WILMINGTON, NORTH CAROLINA 28401 p
ABANDONED WATER SUPPLY WELL 7. FLOOD ZONE INFORMATION OBTAINED FROM NEW PANELS 310 COUNTY GIS WEBSITE AND
UTILITY POLE (NOTE 2 AND 3) ARE SHOWN IN REFERENCE TO FEMA FIRM MAP PANELS 3109 AND 3200, LAST REVISED 2 DESIGN EY: VMD DATE: JULY 2015
♦ STAFF GAUGE JUNE 2006.
TRANSMISSION LINE 8. NATIONAL WETLAND INVENTORY INFORMATION SHOWN WAS OBTAINED FROM THE US FISH DRAWN av: JWO PROJECT No GC5770.02
w DISPOSAL AREA
WATER (NOTE 5) AND WILDLIFE SERVICE WEBSITE.
�o IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII SURFACE WATER PONDS 9. WETLANDS WERE OBTAINED FROM FIELD DELINEATION BY GEOSYNTEC AND PROVIDED IN A CHECKED av: VMD FILE: GC5770.02P050
o V ASH BASIN/COOLING POND BOUNDARY IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII DRAWING DATED 4 MARCH 2015 BASED ON FIELD SURVEY BY WSP. DRAFT WORK I N PROGRESS
(APPROXIMATE) LEACHATE STORAGE AREA
llllllllllllllllllllllllllllllllllllllllllllll
REVIEWED ev: MAO oaawlNC No.:
JUJUJUJUJUJIM p 6.57 AC OF ISOLATED WETLAND AREA FOR REVIEW ONLY, NOT FOR CONSTRUCTION APPROVED BY VMD 3A

I
N 202165
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A
N 201165
B
N 200165
C
N 199165
. —._ — .— ._.. —.-
D
N 198165
E
N 197165
'II
COOLING
POND
z I
3 4
5
6
8 \
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o
N o 0
\
0
0
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/
w
w w
i
�'-AP 3ROXIM SITE
PR BO 3PERTY BOUNDARY
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—.
LAY OF LAND'
AREA�LOLA�
I,
311:11, Z
ul
I
F
i �l
F N 196166 bl 0� 11 1• )� �_ Q I
� qp�• r r y,� '
-
I
DRAFT WORK IN PROGRESS — FOR
REVIEW ONLY, NOT FOR CONSTRUCTION
1 2 3 4 5 1 6 1
7 8
LEGEND
is MAJOR CONTOUR ELEVATION
TARGET EXCAVATION CONTOUR ELEVATION
- - - - -- — APPROXIMATE COOLING POND /CANAL OUTLINE
----------- - - - - -- APPROXIMATE EDGE OF BASIN
APPROXIMATE LAND LIMIT OF LOLA AND ASH BASIN
APPROXIMATE PROPERTY BOUNDARY
_ DIRT /UNPAVED ACCESS ROAD
-- -- -- EXISTING MAJOR CONTOUR ELEVATION
PAVED ACCESS ROAD
COOLING POND AND BASIN WATER ELEVATION
3H:1V SLOPE LABEL
A
B
C
D
CONCEPTUAL CLOSURE NOTES - WET OPTION IV
1. THE 1984 BASIN WILL BE GRADED AS THE DRY OPTION.
2. REMOVE AND PARTIALLY RECONSTRUCT THE BERMS ADJACENT TO THE DISCHARGE CANAL IN THE 1971
BASIN AND THE WEST SIDE OF LOLA, ALLOWING THE COOLING WATER POND TO EXTEND OVER THESE
AREAS.
3. THE PRELIMINARY GRADING SHOWN IS CONCEPTUAL AND WILL BE OPTIMIZED IN SUBSEQUENT
ENGINEERING STAGES.
4. NO STORMWATER CONVEYANCE CALCULATIONS HAVE BEEN PERFORMED IN THIS CONCEPTUAL STAGE.
0 300' 600'
SCALE IN FEET
E
REV I DATE I DESCRIPTION I DRN I APP
GeoSynteC onmmiuN" DUKE
cons ultanO,s OF NC, PC
1300 SOUTH MINT E STREET SUITE410 �� �.d�la,"J R J S CHARLOTTE NO —VI USA
PHONE ]0422]0940
TITLE
CONCEPTUAL BASIN CLOSURE PLAN
PROJECT: L.V. SUTTON STEAM STATION
CLOSURE GRADING OPTIONS
SITE
WILMINGTON, NORTH CAROLINA 28401
F
DESIGN BY. CFB DATE MARCH 2015
(DRAWN BY'. CET PROJECT NO: GC577O
CHECKED BY: CFB FILE 5770 010 WET OPTION VIII
REVIEWED BY RK DRAWING NO.:
APPROVED BY: RK 3B
7 8

Legend
Proposed Landfill Footprint
Notes
1. Basernap Source: FEMA FIRM Panels
rs
011
FIRM FLOODPLAIN MAP
L.V. SUTTON CCR LANDFILL
L.V. Sutton Energy Complex
Wilmington, North Carolina
DUKE
GeosyntecL'l V ENERGY
consultants F1j111(X31'111FSS
Charlotte, NC August 2015
Figure
4
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