7906_Duke_DanRiver_RevisedOpsPlan_DIN27828_20170524

Operations Plan

Dan River Landfill

Duke Energy – Dan River Steam Station

Eden, North Carolina

Amec Foster Wheeler Project No. 7810140065

To: Duke Energy Carolinas, LLC
Date May 23, 2017
From: Amec Foster Wheeler

Amec Foster Wheeler Project No. 7810140065 TOC May 23, 2017
DESCRIPTION OF REVISIONS
The following table provides a brief description of the revisions to the Operations Plan. The Operations
Plan was originally submitted to the North Carolina Department of Environmental Quality (NCDEQ) on
August 26, 2015 and modified as shown in the following table:

Revisions Date of Document Description of Revisions
Initial Issue August 26, 2015 Initial issuance of document.
1 December 24, 2015 Revised per NCDEQ comments
2 May 23, 2017 Revised prior to Cell 1 operations, added Waste Tracking
Plan, revised Dust Control Plan tracking sheet

Amec Foster Wheeler Project No. 7810140065 TOC May 23, 2017
Contents
1 GENERAL FACILITY OPERATIONS .................................................................................................... 1
1.1 Overview ....................................................................................................................................... 1
1.2 Contact Information ....................................................................................................................... 1
1.3 Safety ............................................................................................................................................ 1
1.4 Access and Security Requirements .............................................................................................. 1
1.5 Operating Hours ............................................................................................................................ 2
1.6 Signs ............................................................................................................................................. 2
1.7 Training ......................................................................................................................................... 2
1.8 Record Keeping............................................................................................................................. 2
1.9 Design Drawings ........................................................................................................................... 3
2 OPERATIONS MANAGEMENT ............................................................................................................ 3
2.1 Waste Handling and Landfill Sequencing ..................................................................................... 4
2.1.1 Landfill Capacity ........................................................................................................................ 4
2.1.2 Waste Acceptance, Disposal, and Screening Requirements.................................................... 4
2.1.3 Dust, Litter, Odor, and Vector Control ....................................................................................... 5
2.1.4 Fire Control ................................................................................................................................ 5
2.1.5 Landfill Sequencing ................................................................................................................... 5
2.1.6 Waste Placement ...................................................................................................................... 5
2.1.7 Compaction Requirements and Testing .................................................................................... 6
2.1.8 Cover Requirements ................................................................................................................. 7
2.2 Leachate and Stormwater Management ....................................................................................... 8
2.3 Leachate Collection System (LCS) ............................................................................................... 8
2.3.1 Use of Leachate for Dust Control .............................................................................................. 9
2.3.2 LCS Maintenance ...................................................................................................................... 9
2.3.3 LCS Record Keeping and Sampling ....................................................................................... 10
2.3.4 Leak Detection System (LDS) ................................................................................................. 10
2.3.5 Leak Detection System Maintenance ...................................................................................... 10
2.3.6 Record Keeping and Monitoring .............................................................................................. 10
2.3.7 Response Action Plan ............................................................................................................. 11
2.4 Stormwater Collection and Conveyance ..................................................................................... 12
2.4.1 Stormwater Discharge ............................................................................................................. 13
2.5 Stormwater Maintenance Requirements ..................................................................................... 13
2.6 Groundwater Monitoring Well Access Requirements ................................................................. 13
2.7 Landfill Gas Management ........................................................................................................... 13
3 EROSION AND SEDIMENT CONTROL ............................................................................................. 13
3.1 E&SC Measures Monitoring and Maintenance ........................................................................... 13
3.2 Surface Erosion Monitoring ......................................................................................................... 14
4 VEGETATION MANAGEMENT ........................................................................................................... 14
4.1 Temporary Seeding ..................................................................................................................... 14
4.2 Permanent Seeding .................................................................................................................... 15
4.3 Over-Seeding .............................................................................................................................. 15
5 LANDFILL CLOSURE .......................................................................................................................... 16
6 REQUIRED REGULATORY SUBMITTALS ........................................................................................ 17

Amec Foster Wheeler Project No. 7810140065 TOC May 23, 2017

List of Tables
Table 1 Design Drawings
Table 2 Landfill Capacity
Table 3 Cell Area
Table 4 Leakage Rate Monitoring
Table 5A Temporary Seeding
Table 5B Temporary Seeding Soil Amendments
Table 6A Permanent Seeding
Table 6B Permanent Seeding Soil Amendments
Table 7 Over-Seeding
Table 8 Required Regulatory Submittals

List of Appendices
Appendix I Dust Control Plan
Appendix II Landfill Sequencing Drawings
Appendix III Closure and Post-Closure Plan
Appendix IV Waste Quantity Tracking Plan

Operations Plan Duke Energy – Dan River Steam Station
Dan River Landfill Eden, North Carolina

Amec Foster Wheeler Project No. 7810140065 Page 1 of 17 May 23, 2017
1 General Facility Operations
1.1 Overview
The purpose of this Operations Plan is to provide a plan for the safe and efficient operations of the Dan
River Landfill at Duke Energy’s Dan River Steam Station. This Operations Plan presents the operation
requirements for: 1) General Facility Operations, 2) Operations Management, 3) Erosion and
Sedimentation Control, and 4) Vegetation Management along with guidance for Landfill Closure and
Required Regulatory Submittals. This Operations Plan was prepared consistent with 15A NCAC 13B
.0505 Operational Requirements for Sanitary Landfill rules.

The Dan River Steam Station is located at 900 South Edgewood Road in Eden, Rockingham County,
North Carolina. The proposed Dan River Landfill will be owned by Duke Energy Carolinas, LLC (Duke).
The proposed landfill will be located largely within the footprint of existing Ash Fill 1 on the northeastern
end of the property. The ash within Ash Fill 1 is being removed during construction of the proposed
landfill. The proposed landfill will be bounded by existing overhead electrical lines to the west and north,
rail lines to the east, and a natural gas pipeline to the south.
1.2 Contact Information
Correspondence and questions concerning the operation of the Dan River Landfill should be directed to
the appropriate entity as follows:

Owner

Duke Energy Carolinas, LLC
Dan River Steam Station
900 South Edgewood Road
Eden, North Carolina 27288
[phone]
Facility Contact: Station Sponsor for Landfill Operations or Environmental Professional

State Regulatory Agency

North Carolina Department of Environmental Quality
Division of Waste Management, Solid Waste Section
Asheville Regional Office
2090 US Highway 70
Swannanoa, North Carolina 28778
[phone]
Permitting Engineer: Mr. Larry Frost
1.3 Safety
The Dan River Landfill operations were developed with the consideration to the health and safety of the
facility’s operating staff. The operating staff will be provided with site-specific safety training prior to
landfill operations, and on-site activities are to be conducted according to the applicable sections of
Duke’s Safe Work Practices.
1.4 Access and Security Requirements
The proposed Dan River Landfill is located entirely within Duke’s property limits. Security for the site is
currently in place, consisting of fencing, gates, wooded buffers and security check stations. Unauthorized
vehicle access to the site is prevented around the landfill property by security check stations, woods,
fencing, gates and stormwater conveyance features.

Operations Plan Duke Energy – Dan River Steam Station
Dan River Landfill Eden, North Carolina

Amec Foster Wheeler Project No. 7810140065 Page 2 of 17 May 23, 2017
The access road to the site will be of all-weather construction and will be maintained in good condition.
Potholes, ruts, and debris on the road(s) will receive immediate attention in order to avoid damage to
vehicles.
1.5 Operating Hours
The Dan River Landfill will be operated seven days a week, as needed.
1.6 Signs
A sign providing the landfill permit number and a statement reading, “NO HAZARDOUS OR LIQUID
WASTE PERMITTED” will be posted at the site entrance, and shall be maintained in good condition.

Edge-of-waste markers will be installed and delineate the edge of waste. These markers shall be
maintained in good condition and remain visible at all times.
1.7 Training
Due to the diversity and nature of job tasks required at the Dan River Landfill, personnel shall be
adequately trained to handle facility operations and maintenance.

The Station Sponsor for Landfill Operations shall have a general understanding of all the tasks required
for site operations. Individuals performing the various tasks shall have adequate training of the site-
specific tasks they are assigned. Duke shall provide a site-specific training program for facility personnel.

Noteworthy operations and maintenance tasks to be addressed in training include:

► Maintaining accurate records of waste loading (quantitative and qualitative);
► Operating requirements for stormwater segregation from exposed waste areas; and
► Operating and maintaining the leachate collection system (LCS) and leakage detection
system (LDS).

All training will be documented and training records will be kept on-site. The Station Sponsor for Landfill
Operations will conduct Operations Plan training courses in accordance with the permit requirements.
1.8 Record Keeping
An operating record is to be maintained on-site and include the following records:

► Leachate Collection Systems (LCS) – Periodic Maintenance Documentation;
► Leak Detection System (LDS) Monitoring Information and Periodic Maintenance
Documentation;
► Leachate Monitoring
► Erosion and Sedimentation Control Inspection Logs;
► Periodic Landfill Inspection Reports;
► Dust Control Plan Monitoring Worksheets (included in the Dust Control Plan);
► Groundwater Monitoring (and Sampling) Documentation; and
► Operations Plan.

The above records are to be kept in the operating record for the active life of the landfill and the post-
closure care period. Information contained in the operating record must be furnished upon request to the
North Carolina Department of Environmental Quality Division of Waste Management, Solid Waste Section
(Division) or be made available for inspection by the Division. Additional records kept on-site should
include:
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Dan River Landfill Eden, North Carolina

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► Solid waste facility permits;
► Site Suitability Study;
► Permit to Construct Application;
► Landfill drawings and specifications;
► Record of the amount of solid waste received summarized on a monthly basis based on scale
records or in accordance with the Waste Tracking Plan (Appendix IV);
► Vacuum truck waste logs;
► Regulatory agency inspection reports; and
► Employee training program and records.

1.9 Design Drawings
A list of landfill design drawings is provided in Table 1. The design drawings provide the location of landfill
features, landfill construction details, and technical design and construction notes.

Drawing
No.Title Drawing
No.Title
C-0.0 Cover Sheet C-6.1 Landfill Closure Grades
C-1.1 Site Aerial C-6.2 Landfill Closure Stormwater
C-1.2 Site Existing Conditions C-7.1 Potential Stockpile Areas
C-2.1 Ash Fill 1 Existing Conditions C-8.1 Bedrock Surface Map
C-2.2 Ash Fill 1 Estimated Excavation Grades C-8.2 Groundwater Surface Map
C-3.1 Landfill Cell 1 Compacted Soil Liner Subgrade C-9.1 Cross Sections
C-3.2 LandfilL Cell 1 Geosynthetic Liner Subgrade D-1.1 General Details 1
C-3.3 Landfill Cell 1 Top of Protective Cover D-1.2 General Details 2
C-3.4 Landfill Cell 1 Leak Detection System D-2.1 LCRS Details 1
C-3.5 Landfill Cell 1 Leachate Collection System D-2.2 LCRS Details 2
C-4.1 Landfill Cell 2 Compacted Soil Liner Subgrade D-2.3 LCRS Details 3
C-4.2 LandfilL Cell 2 Geosynthetic Liner Subgrade D-2.4 LCRS Details 4
C-4.3 Landfill Cell 2 Top of Protective Cover D-3.1 Stormwater Details 1
C-4.4 Landfill Cell 2 Leak Detection System D-4.1 Operations Details 1
C-4.5 Landfill Cell 2 Leachate Collection System D-4.2 Operations Details 2
C-5.1 Landfill Cell 3 Compacted Soil Liner Subgrade D-4.3 Operations Details 3
C-5.2 LandfilL Cell 3 Geosynthetic Liner Subgrade D-5.1 Closure Details 1
C-5.3 Landfill Cell 3 Top of Protective Cover D-5.2 Closure Details 2
C-5.4 Landfill Cell 3 Leak Detection System D-5.3 Closure Details 3
C-5.5 Landfill Cell 3 Leachate Collection System D-5.4 Closure Details 4
D-5.5 Closure Details 5
Table 1: Design Drawings

2 Operations Management
The primary objective of operations management at the Dan River Landfill is to dispose of waste material
in compliance with permit conditions while operating in a safe manner.

The Dan River Landfill will generally be operated from northwest to northeast to south as receipt of Permit
to Operate for Landfill Cells 1, 2, and 3 are obtained in general accordance with the Landfill Sequencing
Drawings in Appendix II. Waste will be placed in approximate 10-foot lifts. During operations, diversion
berms and other features will be utilized to separate leachate from non-contact water.

Operations Plan Duke Energy – Dan River Steam Station
Dan River Landfill Eden, North Carolina

Amec Foster Wheeler Project No. 7810140065 Page 4 of 17 May 23, 2017
The exterior side slopes of the landfill will be constructed to slopes of 3H:1V and will be periodically
covered with approximately 12-inches of interim soil cover. Intermediate cover and dust control measures
will be implemented as described in the Dust Control Plan. During operations, tack-on benches will be
located along exterior side slopes at intervals of approximately 30 vertical feet (90 horizontal feet) to
intercept surface water flows and decrease erosion potential. The tack-on benches will convey flow to
downdrains which will consist of HDPE pipes installed perpendicular to the landfill side slope contours.
The downdrains will convey flow to the channel system located around the perimeter of the landfill and
ultimately to the Dan River.

Upon discovery of potential release of waste material from the landfill unit or approved process, the
Station Sponsor for Landfill Operations or Environmental Professional will contact the EHS landfill Subject
Matter Expert.

2.1 Waste Handling and Landfill Sequencing
2.1.1 Landfill Capacity
The proposed Dan River landfill will be constructed as one phase with three cells. The Dan River Landfill
is anticipated to receive waste at a rate of approximately 10,000 cubic yards (cy) per day during closure of
on-site coal combustion residual (CCR) units. Assuming an in-place dry density of CCR materials of 1 ton
per cubic yard, the disposal rate is approximately 10,000 tons per day. The estimated capacity of the
landfill is presented in the following table:

Phase Cell
Area
(ac)
Estimated
Airspace
Volume
(cy)
Dry Density of
CCR
(tons/cy)
Estimated
Disposal Rate
(tons/day)
Estimated
Lifetime
(days)
Estimated
Lifetime1
(years)
1 5.1 179,229 1.0 10,000 18 0.07
2 7.4 522,887 1.0 10,000 52 0.20
3 10.8 1,443,990 1.0 10,000 144 0.56
23.3 2,146,106 --- --- 215 0.83
Table 2: Landfill Capacity
1
TOTALS
Notes:
1. Lifetime in years assumes operations occur 5 days per week.

The actual quantity of material disposed in the landfill may vary pending CCR unit closure requirements.

2.1.2 Waste Acceptance, Disposal, and Screening Requirements
The Dan River Landfill is permitted for the acceptance of the following on-site waste types:

► Coal combustion residuals (CCRs) (including fly and bottom ash, pyrites, and coal mill
rejects) generated at Duke facilities;
► Wastewater treatment sludge generated at Dan River Steam Station;
► Vacuum truck waste generated at Dan River Steam Station;
► Waste soils (i.e. from ash removal activities); and
► Small quantities of inert debris from CCR unit decommissioning activities.

The Dan River Landfill will not be open for public disposal.

The landfill owner or operator shall notify the Division within 24 hours of attempted disposal of any wastes
the landfill is not permitted to receive.

At a minimum, hazardous waste, yard trash, liquid wastes, regulated medical waste, sharps not properly
packaged, polychlorinated diphenyl (PCB) waste as defined in 40 Code of general regulations (CFR) 761,
Operations Plan Duke Energy – Dan River Steam Station
Dan River Landfill Eden, North Carolina

Amec Foster Wheeler Project No. 7810140065 Page 5 of 17 May 23, 2017
and wastes banned from disposal in North Carolina by General Statute 130A-309.10(f), must not be
accepted at the landfill.

Asbestos waste will not be disposed of in the landfill.

The removal of waste from the landfill is prohibited without owner or operator approval. Waste will be
hauled and disposed of by dedicated and consistent operators from the waste source to the landfill.
Access to the interim waste storage location(s) (i.e. existing ash basins and ash fills), haul routes and
landfill are restricted; therefore, no screening of waste is recommended.

2.1.3 Dust, Litter, Odor, and Vector Control
Litter, odors, and vectors are not anticipated to be concerns at the Dan River Landfill. The waste placed
in the landfill does not attract vectors, and windblown material is not anticipated to be a problem. Odors
are typically not a problem at CCR waste landfills.

Dust control is addressed in the Dust Control Plan included as Appendix I. Generally, dust control
measures will be implemented when necessary, and will include at a minimum, watering of dusty roads
and exposed work areas. Other measures include physical measures such as fencing and/or berms,
temporary covers (like tarps), spraying dust suppressants, and modifying the active work area. Leachate
may be used as a dust suppressant in areas that drain to the leachate collection system (i.e. active face
of the landfill) in accordance with the Dust Control Plan. Additionally, interim cover will be vegetated as
soon as practical in order to minimize the blowing of dust on-site.

2.1.4 Fire Control
No open burning shall be permitted at the Dan River Landfill. There are no explosive gas concerns with
ash waste, waste soils, and inert debris from CCR unit decommissioning activities; therefore, the threat of
fire is considered to be minimal.

Although it is unlikely, if a fire occurs at the landfill, the Station Control Room (phone number: 336-635-
3160) shall be notified, and equipment and stockpiled soil shall be provided to control accidental fires.
Dan River Steam Station will notify the local fire department, which will be immediately dispatched to
assist with fire control. Any fire that occurs at the landfill shall be reported to the Division within 24 hours,
and a written notification will be submitted within 15 days by the Station Sponsor for Landfill Operations.

2.1.5 Landfill Sequencing
The Dan River Landfill will be constructed as one phase with three cells as shown in the Landfill
Sequencing Drawings in Appendix II. The landfill sequencing drawings illustrate possible sequences of
landfill operations. The actual filling sequence, fill heights, and grades may be modified at the Owner’s
discretion.

2.1.6 Waste Placement
2.1.6.1 Bottom Ash and Fly Ash Material
Bottom ash and fly ash material at the Dan River Station is transported from the interim waste storage
areas to the landfill by using on-road or off-road dump trucks. Upon reaching the active face of the
landfill, the waste is dumped from the dump trucks onto the active face of the landfill. After the waste is
dumped, the dump trucks exit the landfill and return to the interim waste storage areas. The interim waste
storage areas, haul roads, and landfill are located within the secured Dan River Steam Station facility.

No truck washes are proposed at this time because the haul paths and ash units drain to the existing ash
basin. Upon completion of disposal of on-site CCR materials, the haul roads will be remediated by
removing the top several inches of road material or as necessary and disposing in a lined facility
permitted to receive CCR materials.

Operations Plan Duke Energy – Dan River Steam Station
Dan River Landfill Eden, North Carolina

Amec Foster Wheeler Project No. 7810140065 Page 6 of 17 May 23, 2017
The landfill surface shall be graded to promote surface water drainage to the leachate collection system
(i.e. chimney drains). No waste shall be placed in standing water. Supplemental chimney drains may be
constructed as required to facilitate landfill operations. Details for supplemental chimney drain
construction can be found in the Permit to Construct application drawings.

2.1.6.2 Wastewater Sludge, Pyrites, and Coal Mill Rejects
Wastewater sludge, pyrites, and coal mill rejects will be spread in 6-inch lifts in the center of the
operational area and shall not be placed within 25 feet of the exterior slopes. Wastewater sludge shall be
blended with the other waste (i.e. ash) prior to placement of the next fill lift. Wastewater sludge, pyrites,
and coal mill rejects shall be compacted as densely as practical and specific monitoring. In-place density
testing of these materials is not required.

2.1.6.3 Vacuum Truck Waste
Vacuum trucks are used to remove waste materials from the plant areas that consist of various permitted
CCRs. The origin of the vacuum truck waste materials is typically from various sumps, catch basins,
wheel wash stations, and coal pile sumps located within the plant.

The moisture contents of the vacuum truck waste materials may vary considerably with the waste varying
in consistency from a relatively dry state to a wet, fluid-like state depending on the amount of liquid
present in the sumps or vacuumed areas.

CCR material transported via vacuum truck will occur in a vacuum truck dedicated to Duke Energy
operations or documentation will be obtained to ensure that the vacuum truck contains no human or other
non-permitted waste streams. Vacuum truck waste could also mean similar waste material transported in
smaller water tight units.

Vacuum truck waste shall consist of permitted waste materials. Non-permitted waste materials
inadvertently included with the vacuum truck waste including but not limited to yard trash (paper, plastic,
wood, aluminum, Styrofoam, etc.) shall be visually screened and immediately removed from the vacuum
truck waste after the waste material is dumped in the operational area by vacuum contractor.

The consistency of the vacuum truck waste may vary from a relatively dry state to a relatively wet, fluid-
like state. Vacuum truck waste material shall be moisture conditioned by initial decanting excess
moisture from the waste or by mixing the waste with fly ash, bottom ash, or gypsum materials depending
on its consistency. The vacuum truck waste shall be placed and spread in maximum 6-inch lifts near the
center of the operational area. The vacuum truck waste shall not be placed within 50 feet horizontally
from exterior landfill slopes or within 50 feet of chimney drain structure locations. The vacuum truck
waste material shall be thoroughly mixed with fly ash, bottom ash, or gypsum material during waste
placement using a dozer or other similar grading equipment to provide additional moisture conditioning
prior to compaction. In-place density testing of the vacuum truck waste materials is not required.

The vacuum contractor shall coordinate vacuum truck waste placement with landfill operator personnel
and the vacuum truck waste disposal will be documented.

Dust control measures shall be provided for the vacuum truck waste in accordance with the Dust Control
Plan outlined in Appendix I.

2.1.7 Compaction Requirements and Testing
After the waste is dumped from the trucks and placed on the active face, the waste will be placed in
consecutive, approximate 1-foot thick lifts that do not exceed a 10-foot operational lift. Prior to
compaction of an existing lift, the existing and new material should be adequately blended.

2.1.7.1 In-Place Density and Moisture Content Testing
In-place density and moisture content testing shall be performed at a minimum frequency of one test per
8,000 cubic yards (or one test per 216,000 square feet per 12-inch thick lift). Waste shall be compacted
to a minimum 95 percent of its Standard Proctor (ASTM D698) maximum dry density. Compacted
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Dan River Landfill Eden, North Carolina

Amec Foster Wheeler Project No. 7810140065 Page 7 of 17 May 23, 2017
moisture content shall be within 5 percent of the material’s optimum moisture content as determined by
ASTM D698.

In-place density tests shall be performed using the Sand Cone Method (ASTM D1556), Drive-Cylinder
Method (ASTM D2937), or Nuclear Method (ASTM D6938). If the nuclear method is selected, a minimum
of one comparison density test using the Sand Cone or Drive Cylinder method shall be performed for
every five nuclear density tests, and correlations between the test methods shall be developed and
reviewed by the Engineer. A sample of ash material shall be collected from each density test location and
placed in a sealed container for subsequent field and laboratory moisture testing.

A family of Proctor curves shall be developed for the on-site ash material as standard Proctor moisture-
density tests are performed as a reference for the field density testing. A minimum of one (1) one-point
field Proctor test shall be performed for every five field density tests. Additional one-point field Proctors
shall be performed if the dry density between successive density tests varies by more than 2 pounds per
cubic foot (pcf). If the estimated standard Proctor maximum dry density based on the results of one-point
Proctor testing indicates that the maximum dry density varies by more than 5 pcf from the nearest
representative standard Proctor moisture-density relationship, an additional bulk sample of ash material
shall be obtained and standard Proctor testing shall be performed for the sample as a reference for the
field density testing.

Field moisture content testing shall be performed for each density test using the Direct Heating Method
(ASTM D4959). The Nuclear Method (ASTM D6938) shall not be used for moisture content testing on the
ash material. Comparison laboratory moisture content testing shall be performed using the Oven Method
(ASTM D2216), at an oven temperature of 60 degrees Celsius. The laboratory moisture content shall
control in the event of a discrepancy between laboratory moisture content and in-place moisture content.

2.1.7.2 Laboratory Testing
Laboratory moisture content testing shall be performed in conjunction with the field density testing as
described above. The laboratory moisture content testing shall be performed using the Oven Method
(ASTM D2216), at an oven temperature of 60 degrees Celsius.

Standard Proctor moisture-density relationship (ASTM D698) testing shall be performed at a minimum
frequency of one test for every 50,000 cubic yards of material placed. As previously mentioned,
additional standard Proctor samples shall be obtained and tested if one-point Proctor testing indicates
that the estimated maximum dry density of the material varies by more than 5 pcf from the nearest
representative standard Proctor moisture-density relationship.

2.1.8 Cover Requirements

2.1.8.1 Operational Cover
Operational cover should be applied, as needed, for dust control and stormwater management. If
needed, operational cover should be applied at a thickness suited for its purpose. For example,
operational cover may be applied thinner to provide dust control and it may be applied thicker to tolerate
erosion. Operational covers to provide dust control shall be as described in the Dust Control Plan in
Appendix I.

Downdrains, tack-on benches, and chimney drains will be installed and extended as appropriate. .
Supplemental chimney drains may be constructed as required to facilitate landfill operations. Details for
supplemental chimney drain construction can be found in the Permit to Construct application drawings.
Soil Diversion berms will be used to direct water as appropriate.

Waste will be covered with interim and final cover as applicable, in accordance with the following sections
in this plan. Operational cover consisting of soil is not required, provided the Dust Control Plan included
as Appendix I is followed.

Operations Plan Duke Energy – Dan River Steam Station
Dan River Landfill Eden, North Carolina

Amec Foster Wheeler Project No. 7810140065 Page 8 of 17 May 23, 2017
2.1.8.2 Interim Cover
An interim soil cover layer shall be placed at a thickness of approximately 1-foot on exterior slopes and
areas where final waste grades have been reached. For areas where waste placement will be inactive for
12 months or more, interim cover will be provided in accordance with the Dust Control Plan included as
Appendix I.

2.1.8.3 Final Cover
The final cover system for the Dan River Landfill will be completed within 180 days following the
beginning of closure activities unless otherwise approved by the Division.

The proposed cover system will consist of the following components, from top to bottom:

► 6-inch thick vegetative soil cover;
► 18-inch thick final cover soil;
► Geocomposite drainage layer (or 8 oz/sy non-woven geotextile alternate); and
► 40-mil thick double-sided textured linear low density polyethylene (LLDPE) geomembrane (or 50-
mil LLDPE structured geomembrane alternate);
► Interim cover.

The soil components will provide a surface suitable to sustain vegetative growth while protecting the
underlying geosynthetic components of the cover system. Infiltration through the cover soils will be
collected by the geocomposite drainage layer, while the geomembrane will function as a hydraulic barrier
to reduce infiltration into the waste mass. Interim cover shall be as needed to achieve geosynthetic cover
system subgrade. The interim cover at the time of final closure may consist of ash. The cover system
stormwater management structures will collect both infiltration and surface water runoff. The final cover
will be vegetated with grasses within six months following closure.

Refer to the Closure and Post-Closure Plan in Appendix III for final cover specifications and maintenance
and operations requirements.
2.2 Leachate and Stormwater Management
As previously described, the landfill has been designed to provide separation of leachate from
stormwater. Leachate includes water that has percolated through the waste as well as surface water
flows from the active face of the landfill that are intercepted by chimney drains. The leachate collection
system and leak detection system consists of a geocomposite drainage layer and pipe network to convey
leachate to sumps located in each landfill cell. Leachate will be pumped from the landfill sumps to a
leachate tank storage facility and ultimately to the City of Eden publically owned treatment works (POTW)
for treatment or alternative leachate treatment approach as approved by the Division.

Stormwater runoff from the proposed landfill will be conveyed to the perimeter channel network via a
series of tack-on benches and downdrains.

No truck washes are proposed at this time. Transport of existing on-site CCR materials to the Dan River
Landfill will occur on Dan River Station property and within areas that currently drain to the existing
Primary and Secondary Ash Basins. Loading and unloading of CCR material will be conducted using
methods to prevent excessive spillage and tracking of CCR material during transport. Upon completion of
hauling on-site CCR materials, haul road surfaces will be remediated as necessary to protect the
environment.
2.3 Leachate Collection System (LCS)
The leachate collection system has been designed to meet the performance criteria of providing less than
1 foot of leachate head on the liner system under normal operating conditions and conveying leachate
generated by the 25-year, 24-hour storm event. The leachate collection system generally consists of the
following components:
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Dan River Landfill Eden, North Carolina

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► Leachate collection system pipes within the landfill;
► Sumps at the low points of each cell of the landfill; and
► Force main and appurtenant structures (pumps, valves, etc.).

Each landfill cell is equipped with leachate collection system (LCS) pipes located directly above the
geocomposite drainage layer that collect infiltration and chimney drain flows. The LCS pipes convey
leachate flows by gravity to collection sumps for removal. Clean-outs have been provided at the ends of
the leachate header pipes in the event that the leachate collection and removal pipes become clogged.

Chimney drains have been installed in each cell and shall be extended vertically along with the placement
of each lift. Each chimney drain comprises a vertical, perforated HDPE riser pipe surrounded by filter
aggregate. At the base of the chimney drains, the riser pipe connects to a distribution pipe which conveys
the flow from the riser pipe into the LCS, via infiltration through a constructed layer of drainage material.
During operations, chimney drains may be modified with pipe fittings to allow the chimney drain pipe to drain
leachate from the active face. Supplemental chimney drains may be constructed as required to facilitate
landfill operations. Details for supplemental chimney drain construction can be found in the Permit to
Construct application drawings.

Sumps are located at the low point of the landfill cells. From the sumps, leachate is conveyed to the
leachate force main via side slope risers and pumps and ultimately to the City of Eden POTW or
alternative leachate treatment approach as approved by the Division.

The LCS sump shall be equipped with a dedicated pump system. The pump system shall operate
automatically based on level switches with a low level cutoff and high level run-start activations.
Additionally, a high level alarm shall be in place which will also have a high level activation. The LCS
system control panels will be equipped with visual and audible alarms programmed to activate at the
programmed sump liquid level. The alarms will be equipped with a test function.

It is anticipated that leachate generated at the Dan River Landfill will ultimately discharge to the City of
Eden POTW for treatment or alternative leachate treatment approach as approved by the Division. Plans
and specifications for a leachate storage tank facility will be provided to the Section prior to
commencement of their construction.

2.3.1 Use of Leachate for Dust Control
The following operational requirements shall be followed prior to use of leachate for dust control:

► Use a water truck dedicated for use of leachate as dust control to prevent cross-contamination.
► The water truck shall be marked as dedicated for use of leachate as dust control.
► Ensure that the dedicated water truck is in good working condition and that no leaks are observed
prior to filling with leachate.
► Loading of leachate into the water truck shall be performed within a contained area.
► Upon loading, the water truck shall be driven to within the landfill limit of waste of the landfill.
► The water truck shall be parked within the landfill limit of waste or in a contained area when not in
service.

2.3.2 LCS Maintenance
The maintenance of the leachate management system's physical facilities (consisting of high-density
polyethylene (HDPE) piping) and records will be performed by or under the direct supervision of Duke.
Visual observations of the LCS system performance will be made monthly by Duke staff to verify that the
LCS is performing properly.

Operations Plan Duke Energy – Dan River Steam Station
Dan River Landfill Eden, North Carolina

Amec Foster Wheeler Project No. 7810140065 Page 10 of 17 May 23, 2017
Clean-out pipes will be located on the LCS leachate lateral and header pipes. LCS pipes will be cleaned
out by the use of a clean-out snake or high-pressure water flushing at least once a year, and the LCS
piping will be remote-camera monitored at least once every 5 years. The frequency of clean-out and
camera inspections may be modified based on consecutive inspection results and observed operating
conditions.

2.3.3 LCS Record Keeping and Sampling
Records will be maintained documenting the leachate line cleanout and camera monitoring. Untreated
leachate shall be sampled and analyzed at least semi-annually concurrently with the groundwater water
sampling as discussed in the approved Water Quality Monitoring Plan.

2.3.4 Leak Detection System (LDS)
A leak detection system (LDS) has been incorporated into the design of the landfill. The LDS consists of a
secondary 60 mil HDPE liner system overlain by a secondary geocomposite drainage layer connected to an
LDS sump. Flow collected in the sump will be transferred to the tank storage facility via the leachate force
main.

The LDS sump shall be equipped with a dedicated pump system. The LDS pump system contains one
pump. The LDS pump system shall operate automatically based on level switches with a low level cutoff
and a high level run-start activation. Additionally, a high level alarm shall be in place which will also have
a high level activation. The LDS system control panels will be equipped with visual and audible alarms
programmed to identify sump liquid levels. The alarms will be equipped with a test function.

The LDS has been designed with an Initial Response Leakage Rate (IRLR) of 300 gallons per acre per day
and an Action Leakage Rate (ALR) of 500 gallons per acre per day. Should fluid collected in the LDS exceed
the IRLR or ALR based on routine flow meter readings, the owner or operator shall take steps as indicated in
the facility’s leachate Response Action Plan presented in Section 2.3.7.

The management of the leak detection system’s physical facilities (consisting of piping and flow meters)
and monitoring records will be performed by or under the direct supervision of Duke.

2.3.5 Leak Detection System Maintenance
The maintenance of the leachate management system's physical facilities (consisting of high-density
polyethylene (HDPE) piping, sumps, and pumps) and records will be performed by or under the direct
supervision of Duke. Visual observations of the LDS system performance will be made monthly by Duke
staff to verify that the LDS is performing properly.

Clean-out pipes are located on the LDS leachate lateral and header pipes. LDS pipes will be cleaned out
by the use of a clean-out snake or high-pressure water flushing at least once a year, and the LDS piping
will be remote-camera monitored at least once every 5 years. The frequency of clean-out and camera
inspections may be modified based on consecutive inspection results and observed operating conditions.

2.3.6 Record Keeping and Monitoring
Flow will be measured at the discharge of the LDS sump by a totalizing flow meter. The facility shall
maintain records of monthly flow rate data from the LDS sump from the activation of the cell drainage
system and until the waste height reaches approximately 40 feet. From that point, flow rate data shall be
collected on a quarterly basis until landfill closure.

During the post-closure care period, semi-annual monitoring is required. If the liquid level in the sump
stays below the pump high level run-start (no pump flow) for more than 1 year, then flow rates can be
recorded annually. However, if at any time during post-closure care the pump high level run-start level is
exceeded on the semi-annual or annual schedules, the facility must return to monthly monitoring, until
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Dan River Landfill Eden, North Carolina

Amec Foster Wheeler Project No. 7810140065 Page 11 of 17 May 23, 2017
such time as the liquid level remains below the pump high-level run start activation level for two
consecutive months.

The purpose of LDS monitoring is to monitor if the leakage rates have been exceeded. Specific leakage
rates are identified in Section 2.3.7. To determine if exceedances of the leakage rates have occurred, the
facility must convert monitored data to an average daily flow rate for the cell (in gallons per acre per day,
gpad). For example, the average daily flow rate in gpad is equal to the total monthly flow rate divided by
the number of days in the month, divided by the area of the cell in acres.

Cell Area
(ac)
1 5.1
2 7.4
3 10.8
Table 3: Cell Area

If a leakage rate is exceeded, then the Division must be notified as set forth in the Response Action Plan
presented in Section 2.3.7.

2.3.7 Response Action Plan
The purpose of the Response Action Plan is to describe the necessary course of action in the event the
Initial Response Leakage Rate (IRLR) and/or the Action Leakage Rate (ALR) are exceeded. If the IRLR
is exceeded, steps 1 through 4 will be followed. Should the ALR also be exceeded steps 1 through 6 will
be followed. The IRLR and ALR are referenced collectively as “leakage rates” in the following Response
Action Plan steps.

The IRLR is 300 gallons per acre per day.

The ALR is 500 gallons per acre per day.

The estimated monthly volume of leakage triggering an IRLR or ALR response is provided in the following
table:

Cell Area
(ac)
Initial Response
Leakage Rate
{IRLR}
(gpad)
Monthly Volume1
(gal)
Action Leakage Rate
{ALR}
(gpad)
Monthly Volume1
(gal)
1 5.1 300 45,900 500 76,500
2 7.4 300 66,600 500 111,000
3 10.8 300 97,200 500 162,000
Table 4: Leakage Rate Monitoring
Initial Response Leakage Rate (IRLR)
Notes:
1. Assumes a 30-day month
Action Leakage Rate (ALR)

If the monthly volumes exceed those for the IRLR and the ALR listed in the table above, the response
action steps will include:

1. (IRLR and ALR) - Review physical equipment (pump and flow meter) function and data to confirm
flow readings. Review operations to evaluate where operating equipment may have contacted
the landfill liner or how landfill operations may have influenced the exceedance.

If the exceedance is confirmed, the cell LDS flow shall be recorded daily. Should the daily
monitored LDS flow exceed the IRLR or ALR after the initial exceedance, operational responses
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Dan River Landfill Eden, North Carolina

Amec Foster Wheeler Project No. 7810140065 Page 12 of 17 May 23, 2017
may include: the reduction of active face area; grading to provide improved drainage; and/or, the
addition of interim soil cover.

2. (IRLR and ALR) - Within 14 days of identifying that a leakage rate has been exceeded, the facility
shall contact the Division in writing. Daily LDS flow recording shall continue. Should none of the
daily measured LDS flow rates exceed the leakage rate within 14 days of initial identification of
the exceedance, monthly LDS flow averaging shall resume.

3. (IRLR and ALR) - Within 30 days of identifying that a leakage rate has been exceeded, the facility
shall submit to the Division a written preliminary assessment which shall include at a minimum:

► the amount of the liquid exceedance including initial measurement and daily
measurements, if necessary, to date;
► likely sources of the liquids;
► the possible leak location;
► the possible leak size;
► the probable cause of the leak; and
► an outline of the short-term actions being taken and planned.

4. (IRLR and ALR) - To the extent practicable, evaluate the location, size and cause of the leak; and
assess the potential for leakage escaping into the environment and its mobility. Leachate quality
shall be sampled, including a chemical analysis of LDS fluids, to evaluate potential hazards (pH
and RCRA metals).

5. (ALR only) - When the ALR is exceeded, establish whether or not the unit should be closed or
receipt of waste should be curtailed; and conclude whether waste should be removed from the
unit for inspection, engineered controls, or repair of the liner and drainage system. Evaluate and
prepare to implement what other short-term or long-term measures shall be taken to mitigate or
stop any leaks according to the stage (early operations, middle operations, or closed) of landfill
development.

6. (ALR only) - Within 60 days of identifying that the ALR has been exceeded, submit to the Division
the results of the evaluation performed in Step 4, any actions taken according to Step 5, and any
further measures planned. For as long as there is an exceedance of the action leakage rate, the
owner or operator shall submit monthly reports to the Division summarizing the results of the
remedial actions taken and further actions planned.
2.4 Stormwater Collection and Conveyance
Stormwater that does not come in contact with waste will be treated as non-contact water. Non-contact
water will be managed separately from leachate and may be used for dust control or other operational
purposes. The stormwater collection system has been designed to pass the 50-year, 24-hour storm
event, and generally consists of the following components:

► Tack-on benches;
► Downdrains; and
► Perimeter ditches.

Interim cover will be placed over waste at the exterior side slopes. Tack-on benches will be placed to
convey non-contact surface water from the exterior side slopes to downdrains. The tack-on benches and
downdrains will be constructed and extended as operations progress. The downdrains discharge to
perimeter ditches, which in turn ultimately discharge to the Dan River via a system of culverts and
channels.

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Dan River Landfill Eden, North Carolina

Amec Foster Wheeler Project No. 7810140065 Page 13 of 17 May 23, 2017
2.4.1 Stormwater Discharge
The stormwater system at the landfill was designed to assist in prevention of the discharge of pollutants.
Landfill operation shall not cause a discharge of pollutants into waters of the United States, including
wetlands, that violates any requirement of the Clean Water Act, including but not limited to NPDES
requirements, pursuant of Section 402. In addition, under the requirements of Section 404 of the Clean
Water Act, the discharge of dredge or fill material into waters of the state would be a violation of the
requirements and shall not be allowed by landfill operations.

Operations of the landfill shall not cause the discharge of a non-point source of pollution to waters of the
United States, including wetlands, that violates any requirements of an area-wide or statewide water
quality management plan that has been approved under Section 208 or 319 of the Clean Water Act, as
amended.
2.5 Stormwater Maintenance Requirements
All drainage features (i.e., diversion ditches, berms, risers, discharge pipes, chimney drains, etc.) will be
inspected every 7 days and within 24 hours of rainfall events of 0.5 inches or greater, and documented for
signs of damage, settlement, clogging, silt buildup, or washouts. If necessary, repairs to drainage control
features will be made as early as possible.
2.6 Groundwater Monitoring Well Access Requirements
Groundwater monitoring wells will be located around the landfill perimeter. A readily accessible,
unobstructed path shall be maintained so that monitoring wells may be accessed using four-wheel drive
vehicles. Care must be taken around the wells to prevent any damage to the wells.
2.7 Landfill Gas Management
Because the nature of the waste to be placed in the Dan River Landfill, the Owner does not anticipate that
methane or hydrogen sulfide gas will be generated or that odor will be an issue during operations.
Therefore, landfill gas monitoring and management is not proposed.
3 Erosion and Sediment Control
Erosion and sedimentation control (E&SC) during landfill operations will consist of monitoring and
repairing E&SC stormwater conveyance features and surface erosion as defined in this Operations Plan
and the active Erosion and Sediment Control Plan.
3.1 E&SC Measures Monitoring and Maintenance
Erosion control principles include:

► Disturbing as little area as possible at any one time for landfilling operations.
► Seeding/mulching of disturbed areas commencing as soon as practically possible.
Employing erosion control matting or seeding and mulch on steep slopes and other erosion
prone areas;
► Use of earthen berms, wattles, silt fences, riprap, or equivalent devices down gradient of
disturbed areas, stockpiles, drainage pipe inlets and outlets, and at intervals along grassed
waterways, until such time as permanent vegetation is established.
► Placement of riprap at the inlets and outlets of stormwater piping.

Erosion and sedimentation control structures include stormwater best management practice (BMP)
systems, settling basins, and channels. Stormwater BMP’s shall be inspected every 7 days and within 24
hours of rainfall events 0.5 inches or greater. Sediment shall be removed from each structure when
sediment accumulates to one half of the design depth. Sediment removal shall bring BMP’s to their
original design depth. The BMP’s, embankments, spillways and outlets shall also be observed for erosion
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Dan River Landfill Eden, North Carolina

Amec Foster Wheeler Project No. 7810140065 Page 14 of 17 May 23, 2017
damage. Necessary repairs shall be made immediately. Trash or debris within the riser structures or
outfalls shall be removed.

Channels shall be observed for damage every 7 days and within 24 hours of rainfall events 0.5 inches or
greater. Riprap-lined channels and outlet protection aprons used to prevent damage to channel
vegetation shall be observed for washouts. Riprap shall be added to those areas, as needed, to maintain
the integrity of the structure.

Embankment slopes shall be inspected for erosion every 7 days and within 24 hours of rainfall events 0.5
inches or greater. The embankment slopes shall be mowed at least three times a year. The
embankment slopes shall be fertilized in the second year unless vegetation growth is fully adequate.
Damaged areas shall be reseeded, fertilized and mulched immediately. Seeding, fertilizing, and mulching
shall be in accordance with the North Carolina Erosion and Sedimentation Control Guidelines and in
accordance with the active Erosion and Sediment Control Plan.

Ground stabilization shall be performed within 7 calendar days on perimeter areas and slopes greater
than 3H:1V. Ground stabilization shall be performed within 14 calendar days in other areas. Seedbed
preparation, seeding, soil amendments, and mulching for the establishment of vegetative ground cover
will be applied in accordance with North Carolina Erosion and Sedimentation Control Guidelines.
3.2 Surface Erosion Monitoring
Adequate erosion control measures shall be practiced to prevent sediment from leaving the site.
Channels will be observed once every seven days and within 24 hours after any rainfall event of 0.5
inches or greater.

Slopes will be periodically checked for erosion and vegetative quality, fertilized, and mowed. A slope or
portion thereof shall be identified as needing maintenance if it meets any one of the following conditions:

► Exposed waste on exterior slopes;
► Areas of cracking, sliding, or sloughing; and
► Areas of seepage

Slopes identified as needing maintenance shall be repaired as soon as practical and as appropriate to
correct deficiencies. Repair activities may include re-dressing the slope, filling in low areas, and/or
seeding.
4 Vegetation Management
Within six months after final termination of disposal operations at the site, the area shall be stabilized with
vegetation as required by design drawings and the Closure and Post-Closure Plan included in Appendix
III. Temporary seeding will be applied as required.

Temporary methods of erosion control may be required until permanent cover is established. Mulching,
until a vegetative cover is established, can stabilize areas where final grade has been reached. Soil
mulching can be achieved using wood chips, straw, hay, asphalt emulsion, jute matting, and synthetic
fibers. Mulches allow for greater water retention; reduce the amount of runoff; retain seeds, fertilizer, and
lime in place; and improve soil moisture and temperature conditions.

4.1 Temporary Seeding
Temporary seeding shall be applied as specified in the current Duke Vegetation Maintenance
Implementation Plan (VMIP). Alternatively, temporary seeding will be applied as follows (source: NC
Erosion and Sediment Control Planning and Design Manual [June 2006, Revised March 2009]):

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Dan River Landfill Eden, North Carolina

Amec Foster Wheeler Project No. 7810140065 Page 15 of 17 May 23, 2017
Species Pounds per Acre
Rye Grain (Secale cereale)125
Annual Rye 50
Species Pounds per Acre
German Millet (Setaria italica)50
Species Pounds per Acre
Rye Grain (Secale cereale)125
Table 5A: Temporary Seeding
Late Winter to Early Spring - January through April
Summer - May through August
Fall - September through December

Soil Amendment Pounds per Acre
Agricultural limestone 2,000
Fertilizer (10-10-10)1,000
Mulch (straw)4,000
Table 5B: Temporary Seeding Soil Amendments

Note: Soil amendments are for all-season temporary seeding applications.
4.2 Permanent Seeding
Permanent seeding shall be applied as specified in the current Duke Vegetation Maintenance
Implementation Plan (VMIP). Alternatively, permanent seeding will be applied as follows (source: NC
Erosion and Sediment Control Planning and Design Manual [June 2006, Revised March 2009]):

Species Pounds per Acre
Kentucky 31 Tall Fescue (Festuca arundinacea)100
Rye Grain (Secale cereale)50
Species Pounds per Acre
German Millet (Setaria italica)50
Table 6A: Permanent Seeding
Fall to Early Spring - September through April
Spring to Summer - May through August

Soil Amendment Pounds per Acre
Agricultural limestone 4,000
Fertilizer (10-10-10)1,000
Mulch (straw)4,000
Table 6B: Permanent Seeding Soil Amendments

Note: Conduct North Carolina Department of Agriculture Soil Test(s). Apply fertilizer and lime pursuant to
soil sampling and testing results. Apply minimum 4,000 pounds per acre of straw mulch. Protect steeper
slopes (3:1 horizontal to vertical or steeper with erosion control matting. Water (if available), monitor, and
maintain.
4.3 Over-Seeding
Over seeding will be applied as follows (source: NC Erosion and Sediment Control Planning and Design
Manual [June 2006, Revised March 2009] and the current Duke Vegetation Maintenance Implementation
Plan (VMIP):
Operations Plan Duke Energy – Dan River Steam Station
Dan River Landfill Eden, North Carolina

Amec Foster Wheeler Project No. 7810140065 Page 16 of 17 May 23, 2017
Species Pounds per Acre
Kentucky 31 Tall Fescue (Festuca arundinacea)50
Rye Grain (Secale cereale)25
Species Pounds per Acre
German Millet (Setaria italica)25
Species Pounds per Acre
Tall Fescue (Festuca arundinacea)50
Rye Grain (Secale cereale)25
Fall - September through December
Table 7: Over-Seeding
Late Winter to Early Spring - January through April
Summer - May through August

Note: Cut the existing turf to be over-seeded to an approximate 1-inch height. Aerate the soil and turf
area to be over-seeded. Apply soil amendments pursuant to prior soil sampling and nutrient testing.
5 Landfill Closure
The Dan River Landfill will be closed in accordance with the design drawings and Closure and Post-
Closure Plan included in Appendix III. The Closure and Post-Closure Plan outlines the sequence for
closing the landfill and the post-closure maintenance activities. Closure is designed to minimize the need
for long-term maintenance and control the post-closure release of contaminants. Closure activities may
be revised as appropriate for materials, specifications, technology advancements, or changes in
regulations at the time the landfill is closed or in post-closure. In general, the landfill development is
designed so that final cover can be established as soon as practical.
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Dan River Landfill Eden, North Carolina

Amec Foster Wheeler Project No. 7810140065 Page 17 of 17 May 23, 2017
6 Required Regulatory Submittals
Submittal Requirement
Reporting/Action
Frequency
Groundwater
Monitoring
Reports
Maintain a record of all monitoring events and analytical data in
accordance with the Water Quality Monitoring Plan. Reports of
the analytical data for each water quality monitoring sampling
event shall be submitted to DENR Division of Waste Management
(DWM) within 60 days of sampling event.
Semiannually
Annual
Tonnage
Reports
Tons of waste received and disposed of in the landfill shall be
reported to the DWM and to all counties from which waste was
accepted on forms prescribed by the DWM. Refer to the Permit to
Operate for annual reporting requirement information.
Annually
Must submit no
later than August 1
each year
10-Year Waste
Management
Plan
Per North Carolina G.S. 130A-309.09D (c):
► A 10-year waste management plan shall be developed for
this landfill and submitted to DWM.
► The plan shall be updated and submitted to DWM at least
every three years.
► A report on the implementation of the plan is required to be
submitted to DWM by August 1 of each year.
10-year plan
prepared every 10
years
10-year plan
updated every 3
years
Implementation
report annually
Table 8: Required Regulatory Submittals

APPENDIX I

Dust Control Plan

Dust Control Plan

Dan River Landfill

Duke Energy – Dan River Steam Station

Eden, North Carolina

Amec Foster Wheeler Project No. 7810140065

To: Duke Energy Carolinas, LLC
Date May 23, 2017
From: Amec Foster Wheeler

Amec Foster Wheeler Project No. 7810140065 TOC May 23, 2017
Table of Contents
1 INTRODUCTION AND SITE DESCRIPTION ........................................................................................ 1
2 DUST CONTROL METHODS ............................................................................................................... 1
3 MONITORING AND CORRECTIVE ACTION RESPONSE .................................................................. 2
3.1 Monitoring ...................................................................................................................................... 2
3.2 Corrective Action Response .......................................................................................................... 2

List of Figures
Figure 1 Dust Control Monitoring Grid

List of Attachments
Dust Control Monitoring Worksheet

Dust Control Plan Duke Energy – Dan River Steam Station
Dan River Landfill Eden, North Carolina

Amec Foster Wheeler Project No. 7810140065 Page 1 of 3 May 23, 2017
1 Introduction and Site Description
This Dust Control Plan is for the Dan River Landfill at Duke Energy’s Dan River Steam Station. This Plan
provides dust control methods for managing dust emissions at the landfill. The Plan also provides a
monitoring program and corrective action responses to contain coal combustion residuals (CCR’s) on site
and to prevent dust nuisances to employees and the public. The monitoring program will aid Duke
Energy and the landfill operator in evaluating the dust control methods, or combination of dust control
methods, that prove effective with site specific conditions.

The Dan River Landfill is principally used for CCR management. CCR’s disposed of in the Dan River
Landfill will predominantly consist of fly and bottom ash and is defined in Section 2.1.2 of the Operations
Plan.

This Plan is included as an Appendix to the Dan River Landfill Operations Plan. Please refer to the
Operations Plan for a description of revisions as necessary.
2 Dust Control Methods
The primary potential source of dust emissions in the landfill is the top deck area and active area of waste
placement. These areas are at a higher risk for producing dust due to vehicular and equipment traffic and
earthworks like construction. Exterior landfill slopes are less of a dust control concern, as they have
intermediate or operational soil covers which are vegetated as required in the Operations Plan.

Dust emissions from the landfill can be controlled through a variety of dust control methods. Possible
dust control methods are identified herein. Dust control methods may be characterized as products
and/or applications, structural wind breaks and/or covers, and operational methods.

Dust control methods for the landfill area include:

► Watering;
► Potable or non-potable water (all areas);
► Leachate (areas within the limit of waste footprint that drain to the leachate collection system
only i.e. active face);
► Establishing vegetative cover;
► Mulching;
► Structural controls consisting of:
► Wind breaks (i.e. fencing and/or berms); and
► Temporary coverings (i.e. tarps);
► Spray applied dust suppressants consisting of, and not limited to:
► Anionic asphalt emulsion;
► Latex emulsion;
► Resin in water;
► Polymer based emulsion; and
► Mineral mortar coatings (i.e. posi-shell);
► Calcium chloride;
► Soil stabilizers (i.e. soil cements);
► Operational soil cover;
► Modifying the active working area; and
► Modifying operations during dry and windy conditions.
Dust Control Plan Duke Energy – Dan River Steam Station
Dan River Landfill Eden, North Carolina

Amec Foster Wheeler Project No. 7810140065 Page 2 of 3 May 23, 2017

The operator may use, and is not limited to, combinations of these dust control methods or any method
that is technically sound to control dust for specific site conditions. If the operator intends to use a dust
control method not presented above, the proposed dust control method will be evaluated on a case by
case basis to assess the effectiveness with specific site conditions. For the purposes of this Plan,
operational soil cover will be defined as soil material applied at a suitable thickness to provide dust
control. The effectiveness of the dust control methods implemented should be evaluated through a dust
monitoring program outlined in Section 3.

Operational equipment generally consists of dump trucks, vibratory smooth drum rollers, sheepsfoot
compactors, bulldozers, water trucks, spray trailers, track hoes, and service trucks. Operational
equipment will be used to construct, install, apply, and/or repair dust control methods. The operator will
make provisions to alleviate any on-site issues that arise when primary equipment is being maintained or
is inoperable. In the event that the landfill site contains multiple facilities in the future, the landfill operator
will make provisions to have the necessary equipment to control multiple fugitive CCR dust emission
events.
3 Monitoring and Corrective Action Response
This section describes the dust monitoring program and suggests corrective action responses should
fugitive emissions be observed.
3.1 Monitoring
During landfill operations, a dust monitoring program will be implemented to evaluate the dust control
measure performance and observe the areas for dust emissions. The dust monitoring program will
consist of performing visual observations of dust prone areas, dust control measures, and monitoring
existing and forecasted weather conditions.

Dust emissions can occur under many conditions. For the purposes of this Plan, dust emissions are
characterized as fugitive emissions, where CCR dust may be transported outside the limit of landfill
waste. This is most likely to occur during windy, dry, and hot weather conditions. Therefore, the operator
will monitor both existing and forecasted weather conditions and use dust control measures accordingly.
The dust control measures shall be implemented prior to the forecasted weather conditions.

Equipment operators shall continuously observe the active face and other areas within the landfill limit for
dust emissions. In addition, preventative dust control measures should be observed and documented at
least twice daily (morning and afternoon) when the landfill is in operation, to evaluate the dust control
measure performance. Additional observations may be necessary as site and weather conditions dictate.

Observations will be documented on the attached “Monitoring Worksheet,” or online database/worksheet,
etc. Due to the continual maintenance necessary on moisture conditioned and spray-applied areas, the
operator shall pay particular attention to these areas. Structural controls shall be observed to monitor that
they are achieving their intended purpose. Observations in the landfill area may be made with reference
to the Operations Grid system shown in the attached Figure 1.

Monitoring will be conducted during times when the landfill is in operation. The operator shall continue to
provide necessary dust control measures during periods when operations are inactive (i.e. outages,
weekends, and holidays). Operators are to establish appropriate measures so that dust emissions are
not reasonably likely to occur during inactive operation periods when monitoring is not being conducted.
3.2 Corrective Action Response
If fugitive dust emissions are observed and observations indicate dust control measures are not achieving
their intended purpose, then appropriate corrective actions will be taken. Dust control measures should
be reapplied, repaired, or added, as necessary, to control dust emissions. The operator will construct,
Dust Control Plan Duke Energy – Dan River Steam Station
Dan River Landfill Eden, North Carolina

Amec Foster Wheeler Project No. 7810140065 Page 3 of 3 May 23, 2017
install, apply, and/or repair dust control measures prior to the end of the work day to control dust
emissions during non-operating hours. The operator will implement dust control measures as
preventative controls rather than in response to fugitive dust emissions.

FIGURES

DAN RIVER LANDFILL
DUST CONTROL MONITORING GRID
LANDFILL SUBGRADE
REV. NO.:
0
DATE:08/26/2015
PROJECT NO:
7810-14-0065
FIGURE No.
1AS SHOWNUTM Zone 0
PROJECTION:
NAD99
DATUM:DWN BY:
CHK'D BY:
SCALE:
CHR
RFK
PROJECT
TITLE
DUKE ENERGY CAROLINAS
ROCKINGHAM COUNTY, NC
CLIENTCLIENT LOGO
2801 YORKMONT ROAD, SUITE 100
CHARLOTTE, NC 28208
PHONE [phone], FAX [phone]
LICENSURE: NC ENG: F-1253 NC GEOLOGY: C-247
Amec Foster Wheeler Environment & Infrastructure, Inc.
N

ATTACHMENTS

Month:January Year:2017
Weather 2, 7, 8 Preventative or Corrective Action Taken Was Preventative/Corrective Action Effective?
DATE Yes No Yes No
1 AM
PM
2 AM
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PM
28 AM
PM
29 AM
PM
30 AM
PM
31 AM
PM
*Is dust
present? 4
Examples: Added more water, applied additional
alternative cover material, contacted Plant DR, etc.*
*Is erosion
present? 5
Initials
Temperature range, rainfall data, wind speeds,
dry/damp,etc. If no, describe secondary action taken.
DUST CONTROL MONITORING WORKSHEET
Water Truck
Active
(Y/N)Other
Currently
Percipitating
(Y/N)
Method(s) Used to Control Dust 3Actively working? 1
Site Name:
Yes/No
Alternative Cover
Material in Place
Notes:
1. Actively working indicates several factors at the site.
YES: indicates the waste cell is receiving ash for disposal or material and/or equipment is operational on the day of inspection
NO: indicates the waste cell is not operational, no maintenance work or equipment movement is occurring on the day of inspection.
2. Weather data should be secured from the weather station that is operating at the job trailer. Take readings from the display panel just before the inspection is conducted and make a note of it for the time and date the inspection is being performed.
If the weather station is inoperable at the time of inspection, observed conditions should be entered with a note that the weather station was inoperable.
3. Indicate actual method actively being utilized for dust control and frequency if applicable. (ie: EcoUltimate in place, EcoUltimate applied in am, water truck running, rainfall sufficient for moisture, etc)
4. Is dust present?
YES: indicates that dust is visible at time of inspection. If yes is indicated, there should be preventative/corrective action noted.
NO: indicates that dust is not visible at the time of inspection.
5.Is erosion present?:
YES: indicates erosion (or new erosion) is present at the time of inspection. If yes is indicated, there should be preventative/corrective action noted.(existing erosion should be noted as corrective action until complete)
NO: indicates that no erosion is present at the time of inspection.
6. Each date has two lines for input data. The morning inspection is to be placed in the top row for that date and the afternoon inspection results should be placed in the second.
7. Make sure all data placed in the inspection report above, lines up with any other daily reports you may be completing for your operations, such as erosion and sediment control inspection forms, waste acceptance forms, daily reports and/or logs, etc.
8. Reference the erosion and sediment control inspection forms for rainfall event totals.

APPENDIX II

Landfill Sequencing Drawings

DAN RIVER LANDFILL
LANDFILL OPERATIONS SEQUENCE 1
CELL 1 PROTECTIVE COVER GRADES
REV. NO.:
0
DATE:08/26/2015
PROJECT NO:
7810-14-0065
FIGURE No.
1AS SHOWNUTM Zone 0
PROJECTION:
NAD99
DATUM:DWN BY:
CHK'D BY:
SCALE:
CHR
CSJ
PROJECT
TITLE
DUKE ENERGY CAROLINAS
ROCKINGHAM COUNTY, NC
CLIENTCLIENT LOGO
2801 YORKMONT ROAD, SUITE 100
CHARLOTTE, NC 28208
PHONE [phone], FAX [phone]
LICENSURE: NC ENG: F-1253 NC GEOLOGY: C-247
Amec Foster Wheeler Environment & Infrastructure, Inc.
N
DAN RIVER LANDFILL
LANDFILL OPERATIONS SEQUENCE 2
CELL 1 INTERIM WASTE, CELL 2 INITIAL CONDITIONS
REV. NO.:
0
DATE:08/26/2015
PROJECT NO:
7810-14-0065
FIGURE No.
2AS SHOWNUTM Zone 0
PROJECTION:
NAD99
DATUM:DWN BY:
CHK'D BY:
SCALE:
CHR
CSJ
PROJECT
TITLE
DUKE ENERGY CAROLINAS
ROCKINGHAM COUNTY, NC
CLIENTCLIENT LOGO
2801 YORKMONT ROAD, SUITE 100
CHARLOTTE, NC 28208
PHONE [phone], FAX [phone]
LICENSURE: NC ENG: F-1253 NC GEOLOGY: C-247
Amec Foster Wheeler Environment & Infrastructure, Inc.
N
DAN RIVER LANDFILL
LANDFILL OPERATIONS SEQUENCE 3
CELLS 1 AND 2 INTERIM WASTE, CELL 3 INITIAL CONDITIONS
REV. NO.:
0
DATE:08/26/2015
PROJECT NO:
7810-14-0065
FIGURE No.
3AS SHOWNUTM Zone 0
PROJECTION:
NAD99
DATUM:DWN BY:
CHK'D BY:
SCALE:
CHR
CSJ
PROJECT
TITLE
DUKE ENERGY CAROLINAS
ROCKINGHAM COUNTY, NC
CLIENTCLIENT LOGO
2801 YORKMONT ROAD, SUITE 100
CHARLOTTE, NC 28208
PHONE [phone], FAX [phone]
LICENSURE: NC ENG: F-1253 NC GEOLOGY: C-247
Amec Foster Wheeler Environment & Infrastructure, Inc.
N
DAN RIVER LANDFILL
LANDFILL OPERATIONS SEQUENCE 4
FINAL COVER GRADES
REV. NO.:
0
DATE:08/26/2015
PROJECT NO:
7810-14-0065
FIGURE No.
4AS SHOWNUTM Zone 0
PROJECTION:
NAD99
DATUM:DWN BY:
CHK'D BY:
SCALE:
CHR
CSJ
PROJECT
TITLE
DUKE ENERGY CAROLINAS
ROCKINGHAM COUNTY, NC
CLIENTCLIENT LOGO
2801 YORKMONT ROAD, SUITE 100
CHARLOTTE, NC 28208
PHONE [phone], FAX [phone]
LICENSURE: NC ENG: F-1253 NC GEOLOGY: C-247
Amec Foster Wheeler Environment & Infrastructure, Inc.
N

APPENDIX III

Closure and Post-Closure Plan

Closure and Post-Closure Plan

Dan River Landfill

Duke Energy – Dan River Steam Station

Eden, North Carolina

Amec Foster Wheeler Project No. 7810140065

To: Duke Energy Carolinas, LLC
Date December 24, 2015
From: Amec Foster Wheeler

Amec Foster Wheeler Project No. 7810140065 TOC December 24, 2015
Table of Contents
1 INTRODUCTION ................................................................................................................................... 1
1.1 Project Information ........................................................................................................................ 1
2 CLOSURE PLAN ................................................................................................................................... 1
2.1 Description of Cover System ......................................................................................................... 1
2.1.1 Vegetative Soil Cover ................................................................................................................ 1
2.1.2 Final Cover Soil ......................................................................................................................... 1
2.1.3 Geocomposite Drainage Layer ................................................................................................. 2
2.1.4 Geomembrane .......................................................................................................................... 2
2.1.5 Interim Cover ............................................................................................................................. 2
2.2 Gas Management System ............................................................................................................. 2
2.3 Stormwater Management System ................................................................................................. 2
2.4 Largest Area Requiring Cover System ......................................................................................... 2
2.5 Estimated Maximum Waste Inventory........................................................................................... 2
2.6 Closure Schedule .......................................................................................................................... 2
3 POST-CLOSURE PLAN ........................................................................................................................ 3
3.1 Maintenance Activities .................................................................................................................. 3
3.2 Monitoring Activities ...................................................................................................................... 3
3.2.1 Groundwater and Surface Water Monitoring............................................................................. 4
3.3 Facility Contact Information ........................................................................................................... 4
3.4 Post-Closure Planned Use ............................................................................................................ 4
3.5 Certification ................................................................................................................................... 4

List of Figures
Figure 1 Site Vicinity Map – USGS
Figure 2 Site Vicinity Map – Aerial
Figure 3 Post-Closure Monitoring Grid

List of Appendices
Appendix I Example Post-Closure Monitoring Form
Appendix II Cost Estimate for Closure and Post-Closure Activities

Closure and Post-Closure Plan Duke Energy – Dan River Steam Station
Dan River Landfill Eden, North Carolina

Amec Foster Wheeler Project No. 7810140065 Page 1 of 4 December 24, 2015
1 Introduction
This Closure and Post-Closure Plan is being submitted as part of the Construction Plan Application and
was prepared for the proposed Dan River Landfill in accordance with Title 15A Subchapter 13B of the
North Carolina Administrative Code (NCAC) to meet the requirements of .0503(2), .0504(2), and .0505 for
industrial landfills; and substantive requirements of Rules .1627-.1629 for municipal solid waste (MSW)
landfills. The proposed Dan River Landfill is an industrial landfill and therefore some of the requirements
of Rules .1627-.1629 do not apply. The information contained in this plan will be used to assist Duke
Energy Carolinas, LLC (Duke) in the closure of active waste units and the maintenance and monitoring
required during the post-closure care period.
1.1 Project Information
Duke Energy intends to construct an industrial landfill on Dan River Steam Station property. The
proposed landfill will be located largely within the footprint of existing Ash Fill 1 on the northeastern end of
the property. The ash within Ash Fill 1 will be removed prior to construction of the proposed landfill. The
proposed landfill will be bounded by existing overhead electrical lines to the west and north, rail lines to
the east, and a natural gas pipeline to the south.
2 Closure Plan
The landfill cover system has been designed to reduce infiltration into the landfill and to resist erosion.
The proposed landfill cover system components, size, and closure schedule are described in the following
sections of this report.
2.1 Description of Cover System
The proposed cover system will consist of the following components, from top to bottom:
► 6-inch thick vegetative soil cover;
► 18-inch thick final cover soil;
► Geocomposite drainage layer (or 8 oz/sy non-woven geotextile alternate);
► 40-mil thick double-sided textured linear low density polyethylene (LLDPE) geomembrane (or 50-
mil LLDPE structured geomembrane alternate); and
► Interim cover layer.

The soil components will provide a surface suitable to sustain vegetative growth while protecting the
underlying geosynthetic components of the cover system. Infiltration through the cover soils will be
collected by the geocomposite drainage layer, while the geomembrane will function as a hydraulic barrier
to reduce infiltration into the waste mass. Interim cover shall be as needed to achieve geosynthetic cover
system subgrade. The interim cover at the time of final closure may consist of ash. The cover system
stormwater management structures will collect both infiltration and surface water runoff. The final cover
will be vegetated with grasses within six months following closure.

2.1.1 Vegetative Soil Cover
The vegetative soil layer will consist of 6 inches of soil materials capable of sustaining vegetation, which
will preserve the integrity of the cover system by preventing erosion. The vegetative cover layer will not
be subjected to compaction requirements.
2.1.2 Final Cover Soil
The final cover soil layer will consist of 18 inches of soil materials which will be compacted as specified in
the Specifications. The final cover soil layer will protect the geosynthetic components of the cover system
and reduce infiltration.
Closure and Post-Closure Plan Duke Energy – Dan River Steam Station
Dan River Landfill Eden, North Carolina

Amec Foster Wheeler Project No. 7810140065 Page 2 of 4 December 24, 2015
2.1.3 Geocomposite Drainage Layer
A geocomposite drainage layer will be located beneath the final cover soil layer. The geocomposite will
promote veneer stability and reduce infiltration through the closed landfill by conveying infiltration to
regularly spaced geocomposite outlets.
The alternate cover system option includes an 8 oz/sy non-woven geotextile which will provide soil
separation and allow infiltration into the underlying 50-mil LLDPE structured geomembrane.
2.1.4 Geomembrane
A 40-mil thick double-sided textured LLDPE geomembrane barrier will be installed between the
geocomposite drainage layer and the interim cover to prevent infiltration through the closed landfill. The
geomembrane will have texturing on both sides to improve veneer stability.
The alternate cover system option includes a 50-mil LLDPE structured geomembrane to prevent
infiltration through the closed landfill. The structured component allows drainage and is an integral
component of the geomembrane.
2.1.5 Interim Cover
Interim cover will be placed during landfill operations prior to cover system construction as necessary to
control fugitive dust. Interim cover will consist of soil or an approved alternative.
2.2 Gas Management System
The majority of waste disposed in the Dan River Landfill will consist of CCR materials, predominantly fly
ash and bottom ash. Based on the nature of CCR materials and our experience it is not anticipated that
landfill gases such as methane or hydrogen sulfide gas will be generated or that nuisance odors will be an
issue. Therefore, Duke does not propose monitoring for landfill gas or landfill gas management
measures.
In the event that methane or hydrogen sulfide gases are detected during landfill operations, appropriate
actions will be taken. In the event that gases are regularly detected during active landfill operations, the
final closure and post-closure plan will be modified to address gas. It is anticipated that a minimum
response would be to provide a passive gas venting system with the final closure.
2.3 Stormwater Management System
The proposed Dan River Landfill is designed with a network of stormwater conveyances accounting for
active landfill operations, interim closure, and final closure conditions. Upon final closure, stormwater will
be collected by tack-on benches and conveyed to a series of down-drain pipes which will discharge to the
perimeter channel system. Plans and details illustrating the stormwater management system are
provided in the Engineering Plan drawings.
2.4 Largest Area Requiring Cover System
The proposed Dan River Landfill will be operated until closure, and future expansions are not anticipated
at this time. The largest area requiring cover system construction is the entire footprint of the proposed
landfill which is approximately 23.3 acres.
2.5 Estimated Maximum Waste Inventory
The proposed landfill design provides approximately 2,150,000 cubic yards of airspace as measured from
the top of the protective cover soil following subgrade construction to the bottom of the interim cover
following completion of CCR placement. Assuming a compacted CCR dry density of 1.0 tons per cubic
yard, the available dry tonnage capacity of the proposed landfill is approximately 2,150,000 tons.
2.6 Closure Schedule
Following the completion of waste placement, a final cover system will be constructed. The primary
purpose of a final cover system is to minimize infiltration into the waste. The proposed final cover system
cross section is presented in the Engineering Plan Drawings.
Closure and Post-Closure Plan Duke Energy – Dan River Steam Station
Dan River Landfill Eden, North Carolina

Amec Foster Wheeler Project No. 7810140065 Page 3 of 4 December 24, 2015
Final closure of the landfill will commence when final design grades are achieved, Duke declares that no
more waste will be accepted, or as directed by the North Carolina Department of Environmental Quality
(NCDEQ) Division of Waste Management – Solid Waste Section (the Division). Duke may elect to close
the landfill incrementally during landfill operations once an area large enough to warrant cover system
construction has reached final grades. Prior to beginning closure of the proposed landfill, the Owner or
Operator shall notify the Division that a notice of intent to close the landfill has been placed in the
operating record.
Closure activities for the landfill shall begin no later than 30 days after final receipt of waste unless
otherwise approved by the Division or, if the landfill has remaining capacity and there is a reasonable
likelihood that the landfill will receive additional wastes, no later than one year after the most recent
receipt of wastes. Extensions beyond the one-year deadline for beginning closure may be granted by the
Division if the Owner or Operator demonstrates that the landfill has the capacity to receive additional
wastes and the Owner or Operator has taken and will continue to take the steps necessary to prevent
threats to human health and the environment from the unclosed landfill.
The final cover system will be finished within 180 days following the beginning of closure activities unless
otherwise approved by the Division. Extensions of the closure period may be granted by the Division if
the Owner or Operator demonstrates that closure will, of necessity, take longer than 180 days and they
have taken and will continue to take the necessary steps to prevent threats to human health and the
environment from the unclosed landfill unit. The final cover system for the closed phase will be certified
by a professional engineer as being completed. Duke Energy shall record a notation on the deed to the
landfill property stating that the property has been used as a landfill and its use is restricted under the
Closure/Post-Closure Plan approved by the Division. The Division will be notified by Duke Energy of the
closure completion, certification, deed notation, and placement of these records into the landfill’s
operating record.
Following cover system construction, the landfill will be vegetated with grass and maintained. If the
landfill must be closed prior to reaching the final contours, the surface of the landfill will be sloped to a
minimum grade of 5 percent and maximum grade of 33.33 percent (3H:1V). A final cover will be
established over the landfill unit being closed.
3 Post-Closure Plan
The Post-Closure Plan outlines the monitoring and maintenance activities intended to maintain cover
system integrity during the post-closure care period. During the post-closure period, the landfill cover
system and related facilities must be monitored and maintained.
3.1 Maintenance Activities
Maintenance activities will be conducted as soon as practical to address items of concern identified during
monitoring events. Mowing will occur at a minimum twice per year, other maintenance activities will be
performed as needed and are anticipated to include the following:
► Filling in animal burrows and re-locating the animal;
► Localized placement of fill to prevent ponding of water caused by differential settlement;
► Removal of trees or brushy vegetation within the cover system limits;
► Vegetative cover shall be amended and fertilized as needed to maintain healthy vegetation; and
► Repair of stormwater conveyance measures.
Any disturbed areas will be seeded and soil amendments applied as necessary to establish a healthy
vegetative cover.
3.2 Monitoring Activities
Post-closure monitoring events will be conducted quarterly for the first two years and semi-annually
thereafter during the post-closure care period. Post-closure monitoring will include a review of the
following:
► The condition of site security features such as gates and/or fencing;
Closure and Post-Closure Plan Duke Energy – Dan River Steam Station
Dan River Landfill Eden, North Carolina

Amec Foster Wheeler Project No. 7810140065 Page 4 of 4 December 24, 2015
► Evidence of erosion, settlement, and/or animal burrows within the cover system;
► Type and quality of vegetation within the cover system;
► Evidence of erosion and integrity of stormwater conveyance features; and
► Integrity of the leachate collection and removal system (LCRS).
Example forms that may be used to document the monitoring events are included in Appendix I. The
post-closure grades, stormwater features, and grid are shown on Figure 3 which may be used to assist
with post-closure monitoring. Completed post-closure forms will be maintained in the facility operating
record.
3.2.1 Groundwater and Surface Water Monitoring
Groundwater and surface water monitoring requirements are described in the Groundwater Monitoring
Plan, submitted under separate cover.
3.3 Facility Contact Information
Duke will be responsible for post-closure maintenance and monitoring. Correspondence regarding the
Dan River Landfill should be directed to:
Duke Energy Carolinas, LCC
Dan River Steam Station
900 South Edgewood Road
Eden, North Carolina 27288
[phone]
Station Sponsor for Landfill Operations or Environmental Professional
The physical address of the proposed Dan River Landfill is the same as above.
3.4 Post-Closure Planned Use
The Dan River Landfill will be vegetated following closure. Site access to the public will remain restricted
through landfill closure and the post-closure care period. There are no current anticipated post-closure
uses for the proposed Dan River Landfill. Duke Energy will obtain approval from NCDEQ if a proposed
post-closure use is identified.
3.5 Certification
Consistent with regulations, the end of the closure/post-closure care period must be certified by a
registered professional engineer. To accomplish certification over the required 30-year duration, a
registered professional engineer will prepare annual certifications. The annual certifications will document
that the cover system has been monitored and maintained in accordance with the Post-Closure Plan.
The annual certifications shall be based on observations and results documented on regular post-closure
monitoring reports, maintenance records, and compliance monitoring reports maintained in the Operating
Record.

FIGURES

PREPAREDBY DATE CHECKEDBY DATE JOB NUMBER FIGURE 17810-14-0065
Source: Rockingham County GIS
Copyright:© 2013 National Geographic Society, i-cubed
r
CHR 7/20/2015 CJ 7/20/2015
SITE VICINITY MAP - USGSDAN RIVER LANDFILLDUKE ENERGYROCKINGHAM COUNTY, NORTH CAROLINA
0 2,000 4,0001,000 Feet
Legend
Proposed Dan River Landfill Limit of Waste
Dan River Station Property Boundary
PREPAREDBY DATE CHECKEDBY DATE JOB NUMBER FIGURE 27810-14-0065
Source: Rockingham County GIS
Source: Esri, DigitalGlobe, GeoEye, i-cubed, Earthstar Geographics,CNES/Airbus DS, USDA, USGS, AEX, Getmapping, Aerogrid, IGN, IGP,swisstopo, and the GIS User Community
r
CHR 7/20/2015 CJ 7/20/2015
SITE VICINITY MAP - AERIALDAN RIVER LANDFILLDUKE ENERGYROCKINGHAM COUNTY, NORTH CAROLINA
0 2,000 4,0001,000 Feet
Legend
Proposed Dan River Landfill Limit of Waste
Dan River Station Property Boundary

APPENDIX I

Example Post-Closure Monitoring Form

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APPENDIX II

Cost Estimate for Closure and Post-Closure Activities

Item
No.Description Estimated
Quantity Units Unit Cost Total Cost
1 Mobilization / demobilization 1 EA $443,069.47 $443,069.47
2 Surveying 1 EA $147,689.82 $147,689.82
$590,759.29
3 Silt fence 4,274 LF $3.50 $14,959.81
4 Wattles 43 EA $110.00 $4,730.00
5 Sediment basins 2 EA $15,000.00 $30,000.00
6 Temporary seeding (2d quantity)11.65 AC $1,400.00 $16,310.00
7 Permanent seeding (2d quantity)23.3 AC $1,400.00 $32,620.00
$98,619.81
8 Demolition/disposal of interim stormwater measures 23.3 AC $1,000.00 $23,300.00
9 Subgrade preparation 23.3 AC $1,500.00 $34,950.00
10 Final cover soil layer (18-inch thick compacted fill)56,386 CY $5.50 $310,123.00
11 Vegetative soil layer (6-inch thick un-compacted fill)18,795 CY $11.00 $206,748.67
12 Slope access road surfacing 60,000 SF $0.85 $51,000.00
$626,121.67
13 Anchor trench (includes markers)4,274 LF $6.00 $25,645.40
14 40-mil textured LLDPE geomembrane (2d quantity)1,014,948 SF $1.11 $1,126,592.28
15 Geocomposite drainage layer (2d quantity)1,014,948 SF $0.54 $548,071.92
$1,700,309.60
16 Tack-on benches 11,616 LF $25.00 $290,400.00
17 Downdrains 1,080 LF $190.00 $205,200.00
18 Downdrain outlet structures 3 EA $2,500.00 $7,500.00
19 Geocomposite outlet at perimeter 4,274 LF $6.00 $25,645.40
$528,745.40
$3,544,555.77
20 Design, permitting, and CQA 23.3 AC $15,500.00 $361,150.00
21 Contingency (assumed 15% of construction costs)1 EA $531,683.36 $531,683.36
$892,833.36
$4,437,389.13
$190,445.89
Subtotal - Earthwork
Cost Estimate for Closure and Post-Closure Activities
Table 1 - Estimate of Closure Costs
Duke Energy - Dan River Landfill
Rockingham County, North Carolina
August 26, 2015
General
Erosion and Sediment Control
Subtotal - General
Subtotal - Erosion and Sediment Control / Stormwater Management
Earthwork
Subtotal - Additional Costs
TOTAL ESTIMATE OF CLOSURE COSTS
ESTIMATE OF CLOSURE COSTS PER ACRE
Geosynthetics
Subtotal - Geosynthetics
Stormwater Management
Subtotal - Stormwater Management
Subtotal - Final Cover System Construction Costs
Additional Costs
Item
No.Description Estimated
Quantity Units Unit Cost Total Cost
1 Senior Professional (80 hours/year @ $100/hr)30 YR $8,000.00 $240,000.00
2 Technician (40 hours/year @ $70/hour)30 YR $2,800.00 $84,000.00
3 Clerical (8 hours/year @ $45/hour)30 YR $360.00 $10,800.00
$334,800.00
4 Fencing, Gates, Signs, Etc.30 YR $500.00 $15,000.00
5 Access Roads 30 YR $1,000.00 $30,000.00
6 Mowing ($100/acre per quarter over 23.3 acres)30 YR $9,320.00 $279,600.00
7 Stormwater Structures 30 YR $2,500.00 $75,000.00
8 Leachate Collection and Disposal 30 YR $1,000.00 $30,000.00
9 Final Cover System ($1,500/acre over 5.8 acres)2 30 YR $8,700.00 $261,000.00
$690,600.00
$1,025,400.00
10 $153,810.00
$1,179,210.00
$50,609.87
$39,307.00
$1,687.00
Cost Per Year (Includes 15% Contingency)
Cost Per Acre Per Year (for 23.3 acres)
Notes:
1. Assumes quarterly monitoring and reporting, preparation of annual report, and managing site activities.
2. Assumes erosion repair and seeding for 25 percent of the cover annually.
30 Year Total
30 Year Total per Acre (for 23.3 acres)
Subtotal - Closure and Post-Closure Activities
Additional Costs
Contingency (assumed 15% of subtotal)
Administration/Inspection/Recordkeeping1
Subtotal - Administration/Inspection/Recordkeeping
Maintenance
Subtotal - Maintenance
Cost Estimate for Closure and Post-Closure Activities
Table 2 - Estimate of Post-Closure Maintenance Costs
Duke Energy - Dan River Landfill
Rockingham County, North Carolina
August 26, 2015
Item
No.Description Estimated
Quantity Units Unit Cost Total Cost
1 Senior Professional (24 hours/year @ $100/hr)30 YR $2,400.00 $72,000.00
2 Technician (16 hours/year @ $70/hour)30 YR $1,120.00 $33,600.00
3 Clerical (4 hours/year @ $45/hour)30 YR $180.00 $5,400.00
$111,000.00
4 Approx. 10 Well Pairs (20 Wells) and 4 Surface Water
Samples Tested Semi-Annually for 30 Years 60 EVENT $42,000.00 $2,520,000.00
5 Leachate Sampling Semi-Annually for 30 Years 60 EVENT $500.00 $30,000.00
$2,550,000.00
$2,661,000.00
6 $399,150.00
$3,060,150.00
$131,336.91
$102,005.00
$4,377.90
30 Year Total
30 Year Total per Acre (for 23.3 acres)
Cost Per Year (Includes 15% Contingency)
Cost Per Acre Per Year (for 23.3 acres)
Cost Estimate for Closure and Post-Closure Activities
Table 3 - Estimate of Post-Closure Corrective Action Costs
Duke Energy - Dan River Landfill
Rockingham County, North Carolina
August 26, 2015
Compliance Monitoring and Reporting
Subtotal - Compliance Monitoring and Reporting
Sampling and Analysis
Subtotal - Sampling and Analysis
Subtotal - Post-Closure Corrective Action Costs
Additional Costs
Contingency (assumed 15% of subtotal)

APPENDIX IV

Waste Quantity Tracking Plan

Waste Quantity Tracking Plan

Dan River Landfill

Duke Energy – Dan River Steam Station

Eden, North Carolina

Amec Foster Wheeler Project No. 7810150290

To: Duke Energy Carolinas, LLC
Date May 23, 2017
From: Amec Foster Wheeler

Amec Foster Wheeler Project No. 7810150290 TOC May 23, 2017
Table of Contents
1 INTRODUCTION ................................................................................................................................... 1
2 APPROVED WASTE TYPES ................................................................................................................ 1
3 WASTE QUANTITY TRACKING ........................................................................................................... 1
3.1 Miscellaneous Waste .................................................................................................................... 1
3.2 Ash and Soil Waste ....................................................................................................................... 1
3.2.1 Correlation Between Surveyed and Weighed Quantities .......................................................... 2

List of Appendices
Appendix I Waste Quantity Tracking Plan Worksheets

Waste Quantity Tracking Plan Duke Energy – Dan River Steam Station
Dan River Landfill Eden, North Carolina

Amec Foster Wheeler Project No. 7810150290 Page 1 of 2 May 23, 2017
1 Introduction
This Waste Tracking Plan (Plan) is being submitted in response to the North Carolina Department of
Environmental Quality (NCDEQ) Solid Waste Section (SWS) Permit to Construct (PTC) dated October
26, 2016. The Plan addresses PTC Attachment 3 Permit to Operate Condition No. 8 which states that:
“The owner or operator must maintain a record of the amount of solid waste received at
the landfill unit, compiled on a monthly basis, utilizing installed and well maintained truck
scales. Any alternative methods for establishing truck weights must be approved in
writing by the Section.”
The Plan addresses alternative methods for establishing truck weights in lieu of an on-site truck scale.
2 Approved Waste Types
The Dan River Landfill will accept the following on-site waste types in accordance with the approved
permit:
► Coal combustion residuals (CCRs) (including fly and bottom ash, pyrites, and coal mill
rejects) generated at Dan River Steam Station;
► Wastewater treatment sludge generated at Dan River Steam Station;
► Vacuum truck waste generated at Dan River Steam Station;
► Waste soils (i.e. from ash removal activities); and
► Small quantities of inert debris from CCR unit decommissioning activities.
Inert debris will be generated during CCR unit decommissioning activities and is anticipated to include the
following: ash storage area rail loadout pad; Primary and Secondary Ash Basin outlet structures; grouted
and ungrouted sections of the 36-inch and 48-inch pipe sections that pass below the ash basins; the liner
system for the dredge cell located in the footprint of the Primary Ash Basin; vegetation burn box ash; and
other pipes and inert debris encountered during closure of the CCR units. Non-inert components (i.e.
wood) will not be disposed of in the Dan River Landfill.
Asbestos and petroleum-impacted soils will not be disposed of in the Dan River Landfill.
3 Waste Quantity Tracking
Waste tracking will be performed by waste type as follows.
3.1 Miscellaneous Waste
Miscellaneous waste consists of permitted waste materials excluding CCRs and waste soils and is
anticipated to predominantly consist of inert debris and a nominal amount of vacuum truck waste. The
total weight and number of loads (or other quantity estimate) will be recorded on a daily basis for each
type of miscellaneous waste.
3.2 Ash and Soil Waste
Ash and soil commingled with ash will consume the majority of the Dan River Landfill airspace. Ash and
soil quantities will be recorded by daily representative weight measurements and monthly surveys. The
quantity of ash and soil will be calculated using the following steps:
1. Record the weight of two representative truck loads and the total number of loads placed on a
daily basis.
2. Perform a monthly survey of the Dan River Landfill to calculate the volume of material placed
during that month.
3. Calculate the volume of cover soil placed based on surface area times average depth of soil
cover.
4. Calculate the volume of miscellaneous waste as described in Section 3.1.
Waste Quantity Tracking Plan Duke Energy – Dan River Steam Station
Dan River Landfill Eden, North Carolina

Amec Foster Wheeler Project No. 7810150290 Page 2 of 2 May 23, 2017
5. Calculate the volume of ash and soil placed by subtracting Steps 3 and 4 from Step 2.
6. Calculate the weight of ash and soil placed by multiplying the volume (Step 4) by the average in-
place unit weight based on density test results conducted for the preceding month.
The weight of ash calculated using survey and field density test methods (Step 6) will control for reporting
purposes.
3.2.1 Correlation Between Surveyed and Weighed Quantities
The correlation between surveyed and weighed quantity per truck load will be calculated on a monthly
basis. The weighed quantity per truck load will be calculated as the average of all weighed trucks for the
previous month based on scale records. The surveyed quantity per truck load will be calculated by
dividing the total weight of ash (Section 3.2, Step 6) by the total number of truck loads for the previous
month.
The weighed quantity will be compared to the surveyed quantity to determine if a correlation can be
established. The requirement to weigh two truck loads per day will be waived with the approval of the
NCDEQ if a correlation can be demonstrated between surveyed and weighed quantities.

APPENDIX I

Waste Quantity Tracking Plan Worksheets

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0
0

0
.
0

0
.
0
0

0
.
0

0
.
0
0

0
.
0
6/
2
9
/
2
0
1
7

0
.
0
0

0
.
0
0

0
.
0

0
.
0
0

0
.
0
0

0
.
0

0
.
0
0

0
.
0
0

0
.
0

0
.
0
0

0
.
0

0
.
0
0

0
.
0
6/
3
0
/
2
0
1
7

0
.
0
0

0
.
0
0

0
.
0

0
.
0
0

0
.
0
0

0
.
0

0
.
0
0

0
.
0
0

0
.
0

0
.
0
0

0
.
0

0
.
0
0

0
.
0
MT
D

0

N
/
A

0
.
0
0

N
/
A

0
.
0

0

N
/
A

0
.
0
0

N
/
A

0
.
0

0

N
/
A

0
.
0
0

N
/
A

0
.
0

0

0
.
0

0

0
.
0
0

N
/
A

0
.
0

N
/
A

N
/
A

0
.
0
0

0
.
0
YT
D

0

N
/
A

0
.
0
0

N
/
A

0
.
0

0

N
/
A

0
.
0
0

N
/
A

0
.
0

0

N
/
A

0
.
0
0

N
/
A

0
.
0

0

0
.
0

0

0
.
0
0

N
/
A

0
.
0

N
/
A

N
/
A

0
.
0
0

0
.
0
No
.
 of

Lo
a
d
s
3.

To
t
a
l
 da
i
l
y
 vo
l
u
m
e
 in
c
l
u
d
e
s
 la
n
d
f
i
l
l
 co
v
e
r
.
Co
m
m
e
n
t
s
:
Phase/Cell

G
r
i
d
Total  Daily  Weight 2 (tons)
Da
n
 Ri
v
e
r
 La
n
d
f
i
l
l
 To
n
n
a
g
e
 Su
m
m
a
r
y
Ju
n
e
 20
1
7
Da
t
e
Po
n
d
 As
h
 (P
r
i
m
a
r
y
 Po
n
d
)

P
o
n
d
 As
h
 (S
e
c
o
n
d
a
r
y
 Po
n
d
)

A
s
h
 Fi
l
l
s

L
a
n
d
f
i
l
l
 Co
v
e
r
Miscellaneous  Waste 1 Landfilled
No
.
 of
 Lo
a
d
s
Volume Total  Daily  Volume 3 (cy)
Vo
l
u
m
e
No
.
 of

Lo
a
d
s
1.

Mi
s
c
e
l
l
a
n
e
o
u
s
 wa
s
t
e
s
 co
n
s
i
s
t
 of
 th
e
 fo
l
l
o
w
i
n
g
 ge
n
e
r
a
t
e
d
 at
 Da
n
 Ri
v
e
r
 St
a
t
i
o
n
:

wa
s
t
e
w
a
t
e
r
 tr
e
a
t
m
e
n
t
 sl
u
d
g
e
,
 va
c
u
u
m
 tr
u
c
k
 wa
s
t
e
,
 wa
s
t
e
 so
i
l
s
,
 an
d
 sm
a
l
l
 qu
a
n
t
i
t
i
e
s
 of
 in
e
r
t
 de
b
r
i
s
 fr
o
m
 CC
R
 un
i
t
 de
c
o
m
m
i
s
s
i
o
n
i
n
g
 ac
t
i
v
i
t
i
e
s
.
  Asbestos  and  petroleum ‐impacted  soils  will  not  be  disposed  of  in  the  Dan  River  Landfill.
We
i
g
h
t

V
o
l
u
m
e
No
.
 of

Lo
a
d
s
We
i
g
h
t
Da
i
l
y

Vo
l
u
m
e
(c
y
)
No. of  LoadsDaily Weight (tons)
No
t
e
s
:
2.

To
t
a
l
 da
i
l
y
 we
i
g
h
t
 do
e
s
 no
t
 in
c
l
u
d
e
 la
n
d
f
i
l
l
 co
v
e
r
.
We
i
g
h
t

V
o
l
u
m
e
No
.
 of

Lo
a
d
s
Av
e
r
a
g
e

We
i
g
h
t
(t
o
n
s
)
Av
e
r
a
g
e

Vo
l
u
m
e
(c
y
)
Av
e
r
a
g
e

We
i
g
h
t
(t
o
n
s
)
Av
e
r
a
g
e

Vo
l
u
m
e
(c
y
)
We
i
g
h
e
d
 Wt
.
 / 
Su
r
v
e
y
e
d
 Wt
.
We
i
g
h
e
d
 Vo
l
.
 / 
Su
r
v
e
y
e
d
 Vo
l
.
To
t
a
l
 Ma
t
e
r
i
a
l

in
 La
n
d
f
i
l
l
(c
y
)
Pr
e
v
i
o
u
s
 Ma
t
e
r
i
a
l

in
 La
n
d
f
i
l
l
(c
y
)
In
c
r
e
m
e
n
t
a
l
 Ma
t
e
r
i
a
l

in
 La
n
d
f
i
l
l
(c
y
)
Vo
l
u
m
e
 of

Co
v
e
r
 So
i
l
(c
y
)
Vo
l
u
m
e
 of
 Mi
s
c
.

Wa
s
t
e
(c
y
)
Vo
l
u
m
e
 of

As
h
(c
y
)
Av
e
r
a
g
e
 Un
i
t

We
i
g
h
t
(p
c
f
)
12
3
4
5
6
7
8
9
1
0
1
1
1
2
1
3
1
4
1
5
1
6
1
7
1
8
1
9
2
0
Ja
n
‐17

#
D
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V
/
0
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D
I
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/
0
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D
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Fe
b
‐17

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Ma
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‐17

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Ap
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‐17

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Ma
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‐17

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Ju
n
‐17

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Ju
l
‐17

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Au
g
‐17

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Se
p
‐17

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!
Oc
t
‐17

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!
No
v
‐17

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De
c
‐17

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MA
X
.

0

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/
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MI
N
.

0

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0

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/
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AV
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.

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ST
D
.
 DE
V
.

#
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#D
I
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/
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!
Da
n
 Ri
v
e
r
 La
n
d
f
i
l
l
 Mo
n
t
h
l
y
 Co
r
r
e
l
a
t
i
o
n
Mo
n
t
h
We
i
g
h
e
d
 Qu
a
n
t
i
t
i
e
s

S
u
r
v
e
y
e
d
 Qu
a
n
t
i
t
i
e
s

C
o
r
r
e
l
a
t
i
o
n

S
u
r
v
e
y
 In
f
o
r
m
a
t
i
o
n
Field  Density  Test  Results
Co
m
m
e
n
t
s
: