DukeBelewsCreek_CAP_PilotTest_WorkPlan_20200625

DUKE
ENERGY®
June 25, 2020
State of North Carolina Department of Environmental Quality
Division of Water Resources
Winston Salem Regional Office
Attn: Shuying Wang, P.G., Hydrogeologist
450 Hanes Mill Road, Suite 300
Winston-Salem, NC 27105
Subject: Belews Creek Pilot Test Workplan
Dear Ms. Wang:
Environmental, Health & Safety
526 S. Church Street
Mail Code: EC13K
Charlotte, NC 28202
On December 31, 2019, Duke Energy submitted a Corrective Action Plan Update (CAP) to
address the Belews Creek Steam Station Ash Basin. The CAP update included a robust
groundwater remediation system with extraction and clean water injection wells and associated
treatment.
On February 10, 2020, Duke Energy received a letter from the North Carolina Department of
Environmental Quality (NCDEQ) approving the commencement of a pilot test for six facilities,
including Belews Creek Steam Station. The letter included a request for the submittal of a Pilot
Test Work Plan for review. Attached is the Pilot Test Work Plan for the Belews Creek Steam
Station Corrective Action Plan Remediation System.
Per the NCDEQ's suggestion, Duke Energy plans to set up a follow-up meeting to address any
questions or comments. If you have any immediate questions, please contact Melonie Martin at
Melon ie.Martin o-duke-energy.com.
Respectfully Submitted,
Andrew W. Shull, P.E.
Environmental Services
Cc: Steve Lanter, NCDEQ Central Office
Eric Smith, NCDEQ Central Office
Scott Davies, Duke Energy
Melonie Martin, Duke Energy
John Toepfer, Duke Energy
Bob Wyrick, AECOM
Matt Allen, AECOM
Enclosure: Belews Creek Pilot Test Work Plan

_COM Imagined.
w
/yam Delivered.
p
Ir
jb too
.' t 'wj r
Pilot Test Work Plan
Belews Creek Steam Station
3195 Pine Hall Road
Belews Creek, North Carolina
June 2020

Pilot Test Work Plan
Quality information
Prepared by
Prepared by
ti Aw,
hn Moran, El
Pilot Test Work Plan
Belews Creek Steam Station
3195 Pine Hall Road
Belews Creek, North Carolina
Prepared for:
Duke Energy Carolinas, LLC
526 South Church St
Charlotte, NC 28202-1803
Prepared by:
AECOM
1600 Perimeter Park Drive, Suite 400
Morrisville, North Carolina 27560
aecom.com
Copyright © 2020 by AECOM
Prepared by
Lew Davies, PE
Approved by
Bob Wyrick, P
All rights reserved. No part of this copyrighted work may be reproduced, distributed, or transmitted in any form or by
any means without the prior written permission of AECOM.
AECOM

Pilot Test Work Plan
Table of Contents
1. Introduction..................................................................................................................................................
1
1.1 Regulatory Framework......................................................................................................................
1
1.2 Work Plan Objectives........................................................................................................................
2
2. Project Description.......................................................................................................................................
3
2.1 Conceptual Site Model.......................................................................................................................
3
2.2 Corrective Action Plan.......................................................................................................................
3
2.3 Selected Remedy Design Overview...................................................................................................4
3. Pilot Test Data Collection Objectives.............................................................................................................
6
4. Pilot Test Implementation Activities...............................................................................................................
8
4.1 Pilot Test System Basis of Design......................................................................................................
8
4.2 Pilot Test Design and Implementation.................................................................................................
8
4.2.1 Extraction and Infiltration Well Design.....................................................................................
9
4.2.2 Clean Water Infiltration Treatment System...............................................................................
9
4.2.3 Control and Monitoring Enclosure Design................................................................................
9
4.2.4 Conveyance System Design...................................................................................................9
4.2.5 Electrical, Instrumentation, and Controls Design....................................................................
10
4.2.6 Pilot Test Pre -Construction Activities.....................................................................................
10
4.2.7 System Startup......................................................................................................................11
4.2.8 Effectiveness Monitoring Program.........................................................................................
12
4.2.9 Pilot Test Reporting..............................................................................................................
12
4.3 General Implementation Schedule...................................................................................................
12
5. References................................................................................................................................................
13
Tables
Table 3-1
Pilot Test Data Quality Objectives
Table 4-1
Basis of Design Summary
Table 4-2
Well Construction Details
Table 4-3
Monitoring Plan Summary
,figures
Figure 1-1
Site Location
Figure 1-2
General Site Map
Figure 2-1
Corrective Action Plan Site Map
Figure 2-2
Corrective Action Plan Well Locations
Figure 4-1
General Process Flow Diagram
Figure 4-2
Pilot Scale System Layout
Figure 4-3
Extraction Well Schematic
Figure 4-4
Infiltration Well Schematic
Figure 4-5
Discharge to NPDES Outfall Map
Figure 4-6
Effectiveness Monitoring Well Network and Flow Paths
AECOM

Pilot Test Work Plan
Acronyms
02L
North Carolina Administrative Code, Title 15A, Subchapter 02L
BCSS
Belews Creek Steam Station
CAMA
North Carolina Coal Ash Management Act of 2014
CAP
Corrective Action Plan
CCR
Coal combustion residuals
CO
Consent Order
COI
Constituents of interest
CSA
Comprehensive Site Assessment
CSM
Conceptual site model
Duke Energy
Duke Energy Carolinas, LLC
EMP
Effectiveness monitoring plan
ESC
Erosion and Sediment Control
Gpm
Gallons per minute
NCAC
North Carolina Administrative Code
NCDEQ
North Carolina Department of Environmental Quality
NPDES
National Pollutant Discharge Elimination System
PHR
Pine Hall Road
Site
Belews Creek Steam Station located in Stokes County, North Carolina
SynTerra
SynTerra Corporation
AECOM
iii

Pilot Test Work Plan
1. Introduction
AECOM Technical Services of North Carolina, Inc. (AECOM) prepared this Pilot Test Work Plan on behalf of Duke
Energy Carolinas, LLC (Duke Energy) for field testing of the proposed groundwater remediation strategy at the
Belews Creek Steam Station (BCSS) located in Stokes County, North Carolina (the Site) (Figure 1-1). A general
layout of the Site is included in Figure 1-2. The Corrective Action Plan (CAP) Update (SynTerra Corporation
[SynTerra, 2019a) and the Demonstration of 02L Compliance for the Belews Creek Ash Basin technical memorandum
(Tech Memo) (SynTerra, 2020) present the proposed remediation strategy to address constituents of interest (COI) in
groundwater above the applicable regulatory criteria at or beyond the ash basin Geographic Limitation. The proposed
remediation strategy consists of groundwater extraction combined with clean -water infiltration and treatment for the
areas north and northwest of the ash basin.
This Pilot Test Work Plan presents the key design activities and an implementation plan to install the initial pilot scale
portion of the groundwater extraction, clean water infiltration, and treatment system (groundwater remediation
system). The CAP Update recommended a phased implementation approach to evaluate groundwater flow and
transport processes in a portion of the remedial area to facilitate refinement of the full-scale system design. For the
pilot scale test, Duke Energy will install an initial robust set of extraction and infiltration wells to evaluate the
remediation approach and begin to remediate COls at the ash basin Geographic Limitation. Groundwater modeling
simulations completed during the CAP indicate the selected groundwater corrective action will control COI discharge
beyond the ash basin Geographic Limitation and meet the remedial objectives for the Site.
1.1 Regulatory Framework
Since 2010, Duke Energy has conducted extensive site investigation activities to comprehensively characterize
environmental conditions in soil, groundwater, surface water, and sediments associated with the presence of coal
combustion residuals (CCR) in and around the BCSS coal ash basin and the Pine Hall Road (PHR) landfill. Duke
Energy performed these activities in compliance with the North Carolina Coal Ash Management Act of 2014, as
amended (CAMA), as well as the United States Environmental Protection Agency's CCR Rule. Human health and
ecological risk assessments performed at the Site using United States Environmental Protection Agency (USEPA)
guidance demonstrate that risks to potential human health and ecological receptors associated with the coal ash
basin are not measurably greater than risks posed by naturally occurring background conditions. In 2018, the North
Carolina Department of Environmental Quality (NCDEQ) ranked the ash basin at the BCSS as low -risk pursuant to
CAMA. The corrective action detailed in this work plan is in response to North Carolina Administrative Code (NCAC),
Title 15A, Subchapter 02L (02L) standard groundwater exceedances beyond the Geographic Limitation and is not in
response to any measurable human health or ecological receptor risks associated with the ash basin.
Assessment activities identified two contiguous areas located north and northwest of the Geographic Limitation of the
ash basin with COI groundwater concentrations exceeding the applicable regulatory standards. The Consent Order
(CO) signed by Duke Energy on February 5, 2020, that specifies obligations related to the closure of coal ash
impoundments and groundwater corrective action at six Duke Energy coal combustion sites defines the Geographic
Limitation of the ash basin as 500 feet from the ash basin waste boundary. Groundwater concentrations greater than
applicable 02L standards, Interim Maximum Allowable Concentrations, or background values (whichever is greater)
outside of the ash basin Geographic Limitation constitute regulatory exceedances. For the purposes of this work plan,
AECOM will refer to groundwater concentration regulatory exceedances as 02L standard exceedances. The focus of
groundwater remedial action is COI 02L standard exceedances outside of the ash basin Geographic Limitation.
Between 2015 and 2020, Duke Energy conducted extensive site assessment activities to further define the
conceptual site model (CSM) and evaluate potential remedial alternatives to achieve groundwater 02L standard
compliance. The following documents provide context for the regulatory framework in which the pilot test work plan
was developed and include additional details regarding assessment activities in response to NCDEQ requests:
Comprehensive Site Assessment Report — Belews Creek Steam Station Ash Basin (HDR Engineering, Inc. of
the Carolinas [HDR], 2015a)
Corrective Action Plan Part 1— Belews Creek Steam Station Ash Basin (HDR, 2015b)
AECOM
1

Pilot Test Work Plan
• Corrective Action Plan Part 2— Belews Creek Steam Station Ash Basin (HDR, 2016a)
• Comprehensive Site Assessment Supplement 2 — Belews Creek Steam Station Ash Basin (HDR, 2016b)
• Basis of Design Report (100% Submittal) — Belews Creek Steam Station (SynTerra, 2017a)
• Comprehensive Site Assessment Update — Belews Creek Steam Station Ash Basin (SynTerra, 2017b)
• Ash Basin Pumping Test Report— Belews Creek Steam Station (SynTerra, 2019b)
• Surface Water Evaluation to Assess 15A NCAC 02B.0200 Compliance for Implementation of Corrective Action
Under 15A NCAC 02L .0106 (k) and (1) — Belews Creek Steam Station (SynTerra, 2019c)
• 2018 CAMA Annual Interim Monitoring Report (SynTerra, 2019d)
On behalf of Duke Energy, SynTerra submitted a CAP Update to NCDEQ on December 31, 2019. The CAP Update
presented extensive groundwater flow, COI transport, and geochemical models based on data collected during site
assessment activities. SynTerra used modeling results to refine the CSM and evaluate various remedial technology
alternatives for achieving groundwater 02L compliance at the Site. Section 2.0 of this work plan discusses the CAP
update and remedial alternative selection.
The earliest timeframe for 02L standard compliance identified in the CAP Update is approximately 10 to 13 years
after remedial action begins. In response to a Settlement Agreement between Duke Energy, NCDEQ, and community
groups on December 31, 2019, NCDEQ issued a CO on February 5, 2020, which specified that 02L standard
compliance must be achieved by December 31, 2029. In response to the CO, Duke Energy developed a new
remedial alternative and submitted the updated Tech Memo (SynTerra, 2020) to NCDEQ for approval. AECOM
developed this pilot test work plan based on the remedial alternative proposed in this memorandum.
Duke Energy began source area control measures on March 27, 2019, when ash basin decanting began. Decanting
will decrease upgradient hydraulic head and is on schedule for completion in September 2020. Duke Energy will
continue implementing source control measures at the Site, including complete ash basin closure -by -excavation.
1.2 Work Plan Objectives
The primary objectives of the Pilot Test Work Plan are:
• Provide a general overview of relevant site data, project activities, and historical site information as they relate to
the overall design and implementation of the pilot test remedial action.
• Introduce preliminary data quality objectives for the pilot scale design and implementation that will be used to
further refine the full-scale remedial action.
• Introduce key design elements and consideration for the pilot scale remedial action.
• Provide an overview of pilot scale implementation activities, including engineering design, system installation,
and data collection and evaluation.
• Provide a framework to guide the design and implementation of the pilot scale remedial action.
Pilot test and data quality objectives are provided in Section 3.0
AECOM
2

Pilot Test Work Plan
2 Project Description
The following sections describe the remediation strategy developed using the updated CSM, extensive investigation
data, and groundwater modeling work.
2.1 Conceptual Site Model
An updated CSM was developed as part of the CAP Update (SynTerra, 2019a). The CAP Update CSM and the
associated groundwater flow and transport modeling provide the essential framework upon which the CAP remedial
alternatives were developed and evaluated. The CSM update occurred before ash basin decanting began, a process
which the CSM predicted would significantly impact COI migration outside of the ash basin Geographic Limitation that
is driving the remedial action. A summary of select CSM concepts developed during previous investigations and
determined to be relevant to the pilot scale remedy design and implementation are included below:
• The following groundwater COls were identified for corrective action: arsenic, beryllium, boron, chloride, cobalt,
iron, lithium manganese, strontium, and total dissolved solids.
• Boron can generally be used to define the maximum vertical and horizontal extents of the COI 02L standard
exceedances outside of the Geographic Limitation. The approximate area of 02L standard exceedances as
described in the CAP Update is shown on Figure 2-1.
• North and northwest COI migration from the ash basin is driven by the hydraulic head of ash basin water. In
general, groundwater through the ash basin has a prevailing horizontal flow. From the northwest edge of the ash
basin (area of remedial action) groundwater generally flows northwest toward the Dan River.
• Flow and transport groundwater model predictions indicate the decanting of the water in the ash basin will lower
the hydraulic head within the ash basin and reduce or eliminate additional COI migration northwest of the ash
basin.
• Due to the prevailing horizontal flow within the ash basin, there is limited vertical flow of ash basin porewater
into underlying groundwater.
• Groundwater COI migration from the PHR Landfill occurs within with the Geographic Limitation of either the
PHR Landfill or the ash basin.
• Groundwater COI plumes are contained within Duke Energy's property.
• Groundwater flow and transport modeling suggest 02L standard exceedances extend from the saprolite aquifer
into shallow bedrock aquifer.
• COI plumes associated with the ash basin are considered stable with the exception of the portions of the plume
located north and northwest of the ash basin (area of remedial action).
The CSM serves as the foundation for remedial alterative predictive modeling that was used to select the remedial
action in the CAP Update. Additional data will be collected during system installation and operation (including
hydraulic activity and groundwater composition) that AECOM anticipates will deviate from some aspects of the CSM.
The CSM will be further refined and updated during the pilot scale remedy implementation as additional data is
collected and incorporated into future iterations of the groundwater modeling simulations. Updated groundwater flow
and transport models will be used to further refine and improve upon the full-scale remedy design.
Corrective Action Plan
SynTerra performed a comprehensive site assessment (CSA) at the Site and the results are documented in the
BCSS CSA Update Report, submitted on October 31, 2017 (SynTerra, 2017b). Following NCDEQ review and
approval of the CSA Update, SynTerra incorporated the results of the CSA into an updated CAP (SynTerra, 2019a).
The purpose of the CAP Update was to develop and evaluate remedial alternatives for COls in groundwater using the
comprehensive data set collected during CSA activities. SynTerra used detailed groundwater flow and solute -
transport modeling to evaluate and predict COI concentration trends and key remedial design components, including
AECOM
3

Pilot Test Work Plan
the predicted groundwater infiltration and extraction rates, groundwater flow pathways, and the vertical and horizontal
extents of COI impacts outside of the ash basin Geographic Limitation.
SynTerra developed and evaluated potential remedial technologies against the screening criteria provided in NCDEQ
CAP Guidance (NCDEQ, 2018), 15A NCAC 02L .0106(i) and 40 CFR 300.430. SynTerra evaluated remedial
alternatives for the following three remedial technologies:
Remedial Alternative 1: Monitored Natural Attenuation
Remedial Alternative 2: Groundwater Extraction and Treatment
Remedial Alternative 3: Groundwater Extraction Combined with Clean Water Infiltration and Treatment
SynTerra selected Remedial Alternative 3 as the preferred remedial action as it demonstrated the most effective
means of reducing COI concentrations below the 02L standards beyond the ash basin Geographic Limitation and
provided the shortest timeframe for achieving this objective. However, the projected timeframe of ten to thirteen years
for Remedial Alternative 3 to achieve 02L standard compliance exceeded the compliance date (December 31, 2029)
specified in the CO signed on February 5, 2020.
In March 2020, Duke Energy purchased the 2.67-acre, triangular shaped parcel (Parcel A) located within area of
proposed remedial action. The purchase of Parcel A extended the Geographic Limitation of the ash basin
approximately 300 feet from its former position, therefore reducing area of 02L standard exceedances outside of the
Geographic Limitation. SynTerra developed Remedial Alternative 4, a modified version of Remedial Alternative 3 that
includes an updated system layout to account for the acquisition of Parcel A. Flow and transport modeling predict that
Remedial Alternative 4 can achieve 02L standard compliance within 9 years of system operation and meet the target
compliance date.
Selected Remedy Design Overview
Remedial Alternative 4 (Accelerated Groundwater Extraction Combined with Clean -Water Infiltration and Treatment)
meets the corrective action objectives described in the CAP Update (SynTerra, 2019a) and the December 31, 2029
compliance date. Although there are no significant risks to human or ecological receptors, the alternative will meet the
regulatory requirements most effectively.
The proposed groundwater remediation system consists of a combination of groundwater extraction and clean water
infiltration. The groundwater treatment system is designed to maximize pore volume exchange (i.e. groundwater
flushing) and establish groundwater flow control and capture in areas downgradient of the Belews Creek Steam
Station ash basin. The groundwater extraction system will consist of down -well submersible pumps that convey
groundwater to an on -site treatment system prior to discharging to a National Pollutant Discharge Elimination System
(NPDES) permitted outfall. The clean water infiltration system will consist of a water treatment system to treat surface
water from Belews Lake delivered to the treatment system from the Steam Station fire service water main. After
treatment, clean water will be conveyed to clean water infiltration wells for low-pressure (less than five pounds per
inch) introduction to groundwater. The flow and transport modeling used to develop the selected remedy indicates all
infiltration water will be captured by the extraction well network.
The proposed pilot scale groundwater remediation system is intended to be robust by implementing a significant
portion of the full-scale system, including 28 extraction wells (23 operating during the pilot test) and 23 clean water
infiltration wells. It also includes associated piping and controls, instrumentation and equipment, and the infiltration
water treatment system required to convey clean surface water to infiltration wells and extract COI impacted
groundwater. Figure 2-1 provides a general overview of the proposed groundwater remediation system and Figure
2-2 includes the proposed remedial well layout. Details of the pilot test groundwater remediation system design are
included in Section 4.0.
The additional volume of water introduced by infiltration from clean water in Alternative 4 is intended to significantly
increase the effectiveness of the remediation system in reducing COI concentrations. Alternative 4 includes clean
water infiltration wells, with modeled groundwater infiltration rates of 1.6 gallons per minute (gpm) for a total pilot
scale system infiltration rate of approximately 37 gpm. The modeled extraction rate per well for Alternative 4 is
approximately 1.6 gpm, for a total pilot scale system extraction rate of approximately 37 gpm.
AECOM
4

Pilot Test Work Plan
Remedial Alternative 4 represents an adaptable approach that could be modified if results from the pilot test indicate
changes to the full-scale system are necessary to achieve 02L standard compliance. The addition of wells or
adjusting well pumping schemes can be readily accomplished prior to full-scale system design.
AECOM
5

Pilot Test Work Plan
3. Pilot Test Data Collection Objectives
The primary purpose of phased remedial action implementation is to incorporate the data collected during pilot testing
into the full-scale design while making initial progress towards achieving 02L standard compliance. The primary
objectives of the pilot tests are to:
• Accelerate the corrective action process to meet the CO obligation of meeting applicable groundwater
standards by December 31, 2029 at or beyond the Geographic Limitation.
• Optimize full-scale system performance by using adaptive design methods based on data collected during
pilot testing.
Focus the pilot test on the most challenging areas of the Site and thereby make near -term progress
towards achieving the above -referenced standards.
Pilot test data will be used to evaluate and refine upon the modeling data used to develop the groundwater
remediation system. Data collected during the pilot test will be used to:
• Estimate infiltration and extraction flow rates
• Refine and validate predictive flow and transport modeling
• Evaluate hydraulic influence and connectivity within the pilot test area
• Evaluate COI concentration reductions resulting from groundwater extraction and clean water infiltration
Full-scale remedial well location and quantity and groundwater remediation system design will be updated in
response to the pilot test data. The data quality objectives included in Table 3-1 detail the anticipated data inputs from
the pilot test and the decision rules based on these data that will be used to develop and refine the full-scale system
design.
The pilot test will consist of installation of a portion of the planned full-scale system to evaluate remediation approach,
initial system performance, and to make progress towards groundwater remediation. The extraction and clean water
infiltration wells used for this pilot test will be part of the final full-scale groundwater remediation system.
The results of the pilot test will be used to refine and scale up the final design thereby maximizing the likelihood of
successful operation in the field. Design elements will be adapted from the existing 10-well pumping system including
any lessons learned from its operation. Clean water infiltration tests will be conducted to determine the rates of clean
water infiltration wells screened within or across saprolite, transition zone, and bedrock flow zones. Extraction pilot
test wells will be screened within or across a flow zone similar to model simulations to the extent feasible. Pilot -scale
groundwater extraction test results will be used to:
• Evaluate site -specific well yields for each flow zone or well location
• Validate predictive flow and transport modeling
• Refine calibration predictive flow and transport modeling, if needed
• Evaluate groundwater extraction well capture zones in the saprolite and transition zone flow zones
• If warranted, make adjustments to the groundwater extraction system design
• If warranted, make design adjustments to conveyances for extracted groundwater
• If warranted, make design adjustments to the groundwater treatment system
Pilot -scale clean water infiltration test results will be used to:
• Determine site -specific well infiltration rates
• Validate predictive flow and transport modeling
AECOM
6

Pilot Test Work Plan
• Refine calibration predictive flow and transport modeling, if needed
• If warranted, make adjustments to the clean water infiltration system design
• If warranted, make design adjustments to conveyances for recharge groundwater
• If warranted, make design adjustments to the clean water infiltration treatment system
Extraction and infiltration wells may be operated at different flow rates to assist with understanding the optimal
groundwater extraction rates within distinct aquifer zones or geographic locations within the remediation area.
AECOM
7

Pilot Test Work Plan
4. Pilot Test Implementation Activities
The Pilot Test design and implementation is planned in accordance with the concepts, data, analysis, and results
presented in the CAP Update (SynTerra Corporation, 2019a), and the supplemental Tech Memo (SynTerra, 2020). As
recommended in the referenced documents, the pilot test will be conducted to evaluate the effectiveness of Remedial
Alternative 4 —Accelerated Groundwater Extraction Combined with Clean -Water Infiltration and Treatment.
Pilot Test System Basis of Design
The following Pilot Test System Basis of Design consists of descriptions, preliminary drawings, and supplemental
information that detail the functional remedial systems planned for Pilot Test Implementation. In addition to providing
project stakeholder detailed information regarding the project, the Basis of Design is sequentially developed for ease
of understanding and guiding the engineering team in developing other engineering, implementation, and operations
deliverables for the project. A summary of the basis of design is included as Table 4-1.
Figure 4-1 provides the General Process Flow Diagram for this Pilot Test and details the main functional systems that
will be designed for Pilot Test Implementation. As shown on Figure 4-1, there are two primary functional groups, the
Groundwater Extraction System and the Clean Water Infiltration System. These two groups include various functional
systems as follows:
Pilot Test Groundwater Extraction System
• Twenty-eight pilot test extraction wells (twenty-three operating during the pilot test)
• Extraction water control and monitoring enclosure
• Extracted groundwater equalization tanks and associated transfer pumps
• Water treatment at the existing ash basin water treatment plant
• Collection at existing ash basin lift station (wet well)
• Discharge to permitted NPDES outfall number 006
Pilot Test Clean Water Infiltration System
• Twenty-three pilot test clean water infiltration wells
• Existing Belews Lake surface water intake to the existing fire service water pumps at the Belews Creek Steam
Station
• Clean infiltration water treatment system
• Clean water equalization tanks and associated transfer pumps
• Clean infiltration water control and monitoring enclosure
Figure 4-2 details the Pilot Test System Layout. The proposed well construction details are provided on Table 4-2. In
order to accelerate the pilot test implementation schedule, design, and procurement will be concurrently prepared as
work packages. Therefore, functional system designs will be designed in sequential order of implementation and will
also consider long -lead delivery as a predecessor for work package development. Details of the pilot test functional
systems design, considering work package development priority for implementation, are provided in the following
Work Plan sections.
Pilot Test Design and Implementation
The pilot test involves installation of a portion of the planned system to evaluate system performance and to make
initial progress towards remediation. Design of the functional systems considers implementation and operational
requirements in the design basis. AECOM will design the pilot test system for incorporation into the full-scale
groundwater remediation system.
AECOM
8

Pilot Test Work Plan
4.2.1 Extraction and Infiltration Well Design
Figure 4-3 and 4-4, respectively, present the pilot test extraction and infiltration well designs. AECOM updated the
well design details from the CAP to include constructability and operational requirements of the well systems.
AECOM has already completed well installation specifications and procurement work packages.
During well installation, AECOM will conduct field testing for boron to optimize well construction. In addition, AECOM
will also perform specific capacity testing to evaluate well performance. AECOM may make modifications to the well
construction details based on these field observations during well installation. A North Carolina -licensed well driller
will install each groundwater extraction and clean water infiltration well, in accordance with NCAC 15A, Subchapter
2C — Well Construction Standards, Rule 108 Standards of Construction: Wells Other Than Water Supply (15A NCAC
02C .0108). Drillers will utilize sonic and/or air percussion/hammer drilling technologies to install the extraction and
clean water infiltration wells. Drillers will cap completed wells approximately 2 feet above ground surface for wellhead
tie-in during installation of the conveyance system. Waste derived during well installation will be managed according
to applicable facility waste management practices. Field screening of groundwater will be utilized during well
installation to prevent downward COI transfer during drilling.
Please note that AECOM will install extraction wells EX-13, -14, -17, -20, and -42 for observation purposes, but will
not operate these wells during the pilot test. The anticipated total flow rates from the extraction wells and into the
infiltration wells are approximately 37 gpm and 37 gpm, respectively, based on modeling results. Proposed infiltration
wells will be constructed upgradient of extraction wells; therefore, infiltration water will be captured by the proposed
extraction wells. The pilot test extraction and clean water infiltration well locations were selected to ensure that clean
infiltration water will be captured by the pilot test extraction well network to address specific comments from the
NCDEQ Regional office.
4.2.2 Clean Water Infiltration Treatment System
The water source for infiltration is Belews Lake, which will be routed to the pilot test treatment area utilizing the
existing fire service water main. AECOM is currently designing a system capable of treating this water to the required
02L Standards for infiltration using water characterization data from the fire system. AECOM anticipates that the
treatment system may include initial filtration, chemical and mechanical precipitation, disinfection, pH adjustment, and
final filtration prior to discharge. Figure 4-2 presents the location of the infiltration water treatment system. Piping will
route raw infiltration water from the Belews Creek Steam Station fire service water main to the treatment system
along the southern and western sides of the Ash Basin along Pine Hall Road and Middleton Loop (see Figure 4-2).
4.2.3 Control and Monitoring Enclosure Design
Mobile enclosures (conex boxes or equivalent) will house the groundwater extraction and clean water infiltration
control and monitoring equipment. The enclosures will protect sensitive electronic equipment, while also allowing safe
and easy access to controls, valves, meters, gauges and sample ports for the equipment operators. Figure 4-2
presents the approximate locations of the equipment enclosures. An equipment vendor will shop fabricate the
enclosures, power distribution panels, and local control panels associated with each enclosure.
Figure 4-5 presents details of the infiltration water supply to the clean water infiltration treatment system and
extracted groundwater routing to the NPDES permitted outfall.
4.2.4 Conveyance System Design
A Duke Energy -subcontracted licensed civil contractor will be responsible for the following construction activities:
• Installing and maintaining erosion control measures
• Site grading
• Constructing equipment pads and laydown areas
• On -site set up of shop fabricated process treatment equipment and controls and monitoring enclosures
• Installing underground extraction, infiltration, electrical, and controls piping and conduits for the pilot test
systems
AECOM
9

Pilot Test Work Plan
• Installing mechanical components in the extraction and infiltration wells including, electrical well pumps, well
pump piping, and well controls
• Completing wellheads, including well vaults and enclosures
• Connecting piping between shop fabricated equipment
• Site cleanup and restoration.
Underground water conveyance piping will be high density polyethylene (HDPE) pipe. Electrical and control conduit
will be schedule 80 polyvinyl chloride (PVC). Electrical and control conduit will maintain a minimum of 1-foot
separation in the trench lines.
AECOM will determine the wellhead completion methods based on well location. The civil contractor will install
prefabricated underground vaults with watertight traffic -rated lids in traffic areas. The civil contractor will install above -
grade wellhead completion with fiberglass enclosures in non -traffic and wooded areas for ease of access and
protection from the elements. Each well head vault and enclosure will be watertight and lockable. AECOM anticipates
using only above -grade wellhead enclosures for the pilot test.
Figures 4-3 and 4-4, present details of the extraction and infiltration well mechanical components and wellhead
completion, respectively.
4.2.5 Electrical, Instrumentation, and Controls Design
Duke Energy will contract with an authorized, North Carolina -licensed electrical and instrumentation and controls
contractor(s) for the pilot test project. The electrical and instrumentation and controls contractor(s) will be responsible
for the following construction activities:
• Permitting with the local utility, including submittals, for a new service to the equipment area location — It is
currently estimated that a 460-volt, 3-phase, 600-amp service will be required.
• Providing and installing electrical metering required by the local utility
• Installing and connecting underground and above -ground electrical wiring to electrical motors, distribution, and
control panels for the entire pilot test system
• Installing and terminating individual grounding rods and grounding grids
• Installing and terminating control wiring as needed — This includes fiber optic installation, remote 1/0 panels, and
media converters as necessary.
• Performing an ArcFlash Study in compliance with NFPA 70 and label panels with the correct ArcFlash ratings
• Providing startup and testing support
4.2.6 Pilot Test Pre -Construction Activities
The following sections summarize the pre -construction activities to be completed prior to pilot test system
construction.
Permitting
The following permits will be obtained prior to pilot test implementation:
• Erosion and Sediment Control (ESC) Permit for land disturbance and vegetation removal that are
required to improve site access and facilitate safe construction and maintenance activities
• Underground Injection Control Permit to install and operate the pilot test clean infiltration water system
• Extraction Well Construction Permit to install and operate pilot test groundwater extraction wells
• Existing NPDES Discharge Permit for Outfall #006 may require modification to account for increased
discharge volume
• Local and County Permits for construction and electrical installations, as required
AECOM
10

Pilot Test Work Plan
• Right -of -Way Encroachment Agreement with North Carolina Department of Transportation for the
installation of pipeline corridors beneath Middleton Loop to convey surface water to the clean water
infiltration system and extracted groundwater to the water treatment system
Site Access
Site access for the pilot test system implementation and maintenance activities will require the construction of access
roads and a laydown area for construction equipment and supplies. Prior to system installation, clearing, grubbing,
and grading will be conducted to improve site access and allow for heavy equipment to maneuver within pipeline
corridors. Access roads will be constructed, as needed, throughout the pilot test area to facilitate construction and
maintenance activities. Land disturbance and vegetation removal will comply with the requirements of the ESC
permit.
Utility Locations and Surveying
Duke Energy will provide the approximate location of known utilities within the work area. Utilities within the pilot test
area will be located and marked prior to remedial well installation and pilot scale construction activities. Utility
clearance procedures will involve utility location and marking by North Carolina's 811 One Call service in addition to a
private utility locator. Private utility location will include the use of ground penetrating radar and/or electromagnetic
survey within pipeline corridors and the groundwater remediation system installation area. Unidentified, marked
utilities will be cleared via soft dig methods. Construction activities will adhere to Duke Energy's soft dig requirements
and procedures when excavating in close proximity to identified utilities.
Following remediation well installation and pilot test construction activities, Duke or an approve contractor will survey
well locations, pipeline corridors, utilities, and remedial equipment installations for preparing as -built documentation.
Construction Planning
Prior to construction, standard planning documents should be prepared to help guide safety and quality. These plans
include:
• Construction Health and Safety Plan: This plan includes Duke Energy site -specific rules and requirements for
work.
• Construction Execution Plan including a construction schedule
• Construction Quality Control Plan
• Emergency Response and Contingency Plan
• Field daily tracking forms and sign in/out sheets
• Contractor meeting agenda and minutes templates
4.2.7 System Startup
As part of the pilot test construction bid phase, AECOM will supply a Startup and Commissioning Plan that explains
the system testing and commissioning responsibilities of contractors and vendors in regard to their scope. This plan
typically includes requirements for testing and documentation, including the following items:
• As -Built documentation
• Operator training
• Electrical and mechanical checks of all motors for rotation, balance, and electrical compliance
• Electrical checks of control circuits
• Loop testing
• Instrument calibration
• Electrical safety verification
• Ground fault testing
AECOM
11

Pilot Test Work Plan
Dynamic load and functional testing of pumps
PLC testing including proper operations and fail-safe verification
The pilot test system startup will be conducted in phases to evaluate the performance and functionality of system
components. The initial phase of system start-up will include testing of mechanical and electrical processes, including
system controls and alarms. Controls and alarms will be simulated to confirm operation prior to start-up of mechanical
equipment. This phase is performed prior to groundwater extraction and clean water infiltration. The second phase of
start-up will include operation and evaluation of the groundwater extraction system to confirm operation of the
extraction network. The last phase of start-up will include operation of the infiltration water system to evaluate flow
rates and pressures at infiltration water wells. Testing of the clean water treatment system will be conducted prior to
system startup activities to evaluate treatment effectiveness. Following the phased system startup, the pilot test
system will go through a commissioning process under normal operating conditions for a predetermined amount of
time to verify system performance and reliability. Following commissioning, the system can be signed off by and
turned over to the Owner. Pilot test system operational data collection will be used to inform and improve the full-
scale system design.
4.2.8 Effectiveness Monitoring Program
An effectiveness monitoring plan (EMP) was developed as part of the CAP consistent with 02L .0106(h)(4). The EMP
is designed to monitor groundwater conditions at the BCSS and document progress towards the remedial objectives
over time. The EMP was designed to be adaptive over the project life cycle and can be modified as the groundwater
remediation system design is prepared, completed, or evaluated for termination.
Once the pilot test system has operated for a sufficient amount of time and data gathered for implementation of the
full-scale system, the EMP may be updated with new data and information regarding the site hydrogeologic
characteristics and any potential updates to the site CSM or models. The proposed EMP is included as Table 4-3 and
the locations of EMP wells are displayed on Figure 4-6. A more detailed site -specific pilot test monitoring plan will be
submitted to the NCDEQ prior to pilot test implementation. This monitoring plan will include details regarding
sampling frequency, parameter list, and well locations that will be used to determine the effectiveness of the pilot test
program.
4.2.9 Pilot Test Reporting
Following completion of pilot system start-up testing and commissioning and testing, a summary of pilot test
construction activities will be prepared. This report will include:
• Summary of pilot test system installation, start-up, and commissioning
• Results of testing conducted during installation
• Summary of modifications/variances from the Pilot Test Work Plan
• As -Built Drawings
General Implementation Schedule
The following schedule provides an approximate schedule to complete the work detailed in this work plan. All target
dates are subject to change.
• Final design (August 2020)
• Extraction and Infiltration well network Installation (September 2020)
• Extraction and Infiltration well hydraulic testing (October 2020)
• Construction (February 2021)
• Pilot test system startup (April 2021)
• EMP implementation (ongoing following start-up)
• Scale -up activities (to be determined)
AECOM
12

Pilot Test Work Plan
5. References
HDR, 2015a. Comprehensive Site Assessment Report - Belews Creek Steam Station Ash Basin. September 9, 2015.
HDR, 2015b. Corrective Action Plan Part 1 — Belews Creek Steam Station Ash Basin. December 8, 2015.
HDR, 2016a. Corrective Action Plan Part 2 — Belews Creek Steam Station Ash Basin. March 4, 2016.
HDR, 2016b. Comprehensive Site Assessment Supplement 2 — Belews Creek Steam Station Ash Basin. August 11,
2016.
NCDEQ, 2018. Corrective Action Plan Content for Duke Energy Coal Ash Facilities. April, 27, 2018.
SynTerra, 2017a. Basis of Desing Report (100% Submittal) — Belews Creek Steam Station. August, 2017.
SynTerra, 2017b. 2017 Comprehensive Site Assessment Update. October 31, 2017.
SynTerra, 2019a. Corrective Action Plan Update — Belews Creek Steam Station. December 31, 2019.
SynTerra, 2019b. Ash Basin Pumping Test Report — Belews Creek Steam Station. Belews Creek, NC.
SynTerra, 2019c. Surface Water Evaluation to Assess 15A NCAC 02B — Belews Creek Steam Station. Belews Creek,
N C.
SynTerra, 2019d. CAMA Interim Monitoring Report — Belews Creek Steam Station.
Synterra, 2020. Demonstration of 02L Compliance for the Belews Creek Ash Basin Technical Memorandum. March
23, 2020.
AECOM
13

Pilot Test Work Plan
Tables
AECOM

Table 3-1
Pilot Test Data Quality Objectives
Belews Creek Steam Station Pilot Test Work Plan
Duke Energy Carolina, LLC, Belews Creek, NC
Problem Statement
Restore groundwater at or beyond the geographic limitation affected by
the ash impoundments to the applicable 02L/IMAC/BTV standards.
Decision Statements
Is the number of wells, well configuration, and system capacity sufficient
to achieve the design objective outlined in the problem statement?
Test Area Boundaries
Pilot Test Area
Inputs to the Decision
Decision Rules*
Compare well capacity with design
If well capacity is less than design and determined to be insufficient in
Well capacity: Well capacity measurement to be
conjunction with other inputs, increase the number of wells
determined during pilot test system design
If well capacity is greater than design and determined to be more than
sufficient in conjunction with other inputs, decrease the number of wells
If the observed hydraulic influence is less than anticipated and other
inputs and updated modeling indicate insufficient influence to meet the
Area of hydraulic influence: Estimated via water
problem statement, adjust the flowrates (if capacity is available). If the
level change measured in monitoring wells in
flowrate adjustment is insufficient, reconfigure or add to the remedial
conjunction with operating flowrates at infiltration and
well network
extraction wells, water level maps, gradient analysis
and modeling results.
If hydraulic influence is greater than anticipated, evaluate reducing the
number of wells, increasing the well spacing and/or adjusting flow rates
Hydraulic connectivity: Conservative tracers of
If the anticipated hydraulic connectivity is not observed in conjunction
infiltration water (specific conductivity, key
with COI concentration trends and modeling, indicating insufficient
cation/anion indicators) measured at monitoring wells
capture and flushing to reduce COI concentrations to 02L standards, first
in conjunction with other inputs. May be of limited
adjust flowrates (if capacity is available). If the flowrate adjustment is
use during short duration of pilot test.
insufficient, reconfigure or add to the remedial well network.
Concentration Reductions: Measured via sampling
If the anticipated COI concentration trends are not achieved, first adjust
of monitoring wells in key areas where
flowrates (if capacity is available). If the flowrate adjustment is
changes/reductions in concentration is anticipated.
insufficient, use other inputs to inform reconfiguration and/or additions to
May be of limited use during short duration of pilot
the remedial well network.
test.
Notes:
`For the proposed hydraulic remedies at the sites, the data inputs, although listed separately here, will be used in conjunction with one another to evaluate
effectiveness of the remedy.
02L - NCAC Title 15A, Subchapter 02L, Groundwater Classification and Standards
BTV - Background threshold value
COI - Constituent of Interest
IMAC - Interim Maximum Allowable Concentrations
AECOM Page 1 of 1

Table 4-1
Basis of Design Summary
Belews Creek Steam Station Pilot Test Work Plan
Duke Energy Carolinas, LLC, Belews Creek, NC
Meet applicable groundwater criteria at and beyond the ash basin compliance boundary as defined in the applicable CAP Update Report and Tech Memo.
Remediation Goals
Generalized Remediation Goals
Applicable standards are North Carolina groundwater standards [NCAC Title 15A, Subchapter 02L, Groundwater Classification and Standards (02L); Interim Maximum Allowable Concentrations
(IMAC); or background values, whichever is greater)]
Groundwater Extraction/Clean Water
Infiltration Rates
Approximately 37 m from pilot test extraction wells. Approximately 37 m to pilot test infiltration wells.
pp y gp p pp y gp
Constituents of Interest
Boron, Chloride, Lithium, Cobalt, Manganese, Thallium, Arsenic, Beryllium, Strontium, Iron, TDS
Groundwater Draw -Down
To -be -determined during Pilot Testing. The groundwater extraction system will be designed to maximize draw -down to extent practical to increase groundwater extraction while protecting the
submersible pumps. This is also dependent on on -going discussion regarding well construction detail modifications.
Design Objectives
Groundwater Zone of Capture
To -be -determined during Pilot Testing to the extent practical. The BCSS Pilot Area lacks sufficient monitoring location to evaluates stem performance
Extraction Well Spacing
Varies
Injection Well Spacing
Varies
Discharge Location
Discharge to on -site Evoqua groundwater treatment system and ultimately to NPDES Outfall 006
Generalized
Submersible pumps within the extraction well network will dewater wells (intent to behave as drains), inducing groundwater capture. Extracted water will be conveyed to on -site Evoqua
Process Description
groundwater treatment system. Treated surface water will be conveyed to clean water infiltration well network increasing groundwater gradient towards capture zone and promote flushing
All piping for remediation wells to be connected to manifolds inside control and monitoring enclosures. Manifolds will include the instrumentation and controls for each well. All wells to connect to
Control and Monitoring Enclosures
manifold individually via home -run piping (however, this should re-evaluated as part of value engineering and actual need for individual well data). Control and distribution panels located interior
as well
Groundwater Extraction Equipment
Must be commonly available, serviceable, and universally compatible with system controls. Strive for common equipment to achieve buying ower and commonality between facilities
Well Pump Control
Extraction well pumps will cycle on/off to prevent the extraction well pump from exposing the screened interval and damaging pump. Flow rates will be controlled manually using a control valve.
Well Level Monitoring
Water levels will be periodically checked manually. Level switches will be used to control and protect the submersible pumps. Verify need for level transmitters
Flow Monitoring
Instantaneous and totalizing flow measurement for individual wells and total influent prior to discharge to the Evoqua groundwater treatment system. Discussion point for value engineering
Conveyance
All exterior conduit/pipe to be buried whenever possible. One road crossing is anticipated. Minimize road crossing and overall trenching work. Oversize piping to allow for cleaning (buried pipe
size 1-inch diameter minimum). Cleanout vaults to be used and turns and every 200 LF. Extraction and infiltration water equipment and manifolds to be oversized for full-scale expansion.
General Design Philosophy
Existing Utilities/Infrastructure
Groundwater extraction to discharge to the existing Evoqua treatments stem. Infiltration water to be conveyed to the treatments stem from an existing fire service water main.
Secondary Containment
Not required for conveyancepipe(except possibly at Dam crossing in Phase 2), but required for holding/equalization tanks and leak detection/sump in collection buildings.
Secondary containment 110 /o of the holding/equalization tank maximum capacity.
Service Life
Design for approximately 15 year service life
Flexibility
Include equalization tank, pump, conveyance, and electrical/controls capacity for future expansion.
Redundancy
Include spare conveyance pipe/conduit where appropriate for future expansion. Include duplicate pumps, infiltration water treatment process equipment, and equalization tanks to minimize
system downtime. Evaluate redundancy at all critical systems that could limit run time.
Operation & Maintenance
Design for safety! Design for maximum automation and remote monitoring. Design for full serviceability of all major components
Winterization
Design for all -season operation, including electric heat tracing and insulation where required.
Generalized Controls Requirement
Minimize complexity, include Fail -Safes to prevent spills, to protect the operating equipment, and to allow for automated operation with minimal operator input. Design for power failure scenarios
(NC automated valves). Cannot allow untreated infiltration water into the infiltration wells.
Instrumentation/ Controls
Remote Monitoring
Cellular -based remote monitoring capabilities, allow full remote operation of all systems by approved operator personnel. Radio based to main HMI. Additional discussion on control and admin
network wit Duke CCP, PMC, and Major Projects
Integration with Facility Operations
Controls to be integrated with the Evoqua treatments stem and the fire main delivery pumpfor infiltration water
Enclosure Communications
Each control and monitoring enclosure to contain dedicated/independent control, but communication between enclosures for alarm interlocks
AECOM Page 1 of 2

Table 4-1
Basis of Design Summary
Belews Creek Steam Station Pilot Test Work Plan
Duke Energy Carolinas, LLC, Belews Creek, NC
Extraction Wells
Number of Wells
28pilot-scale 23 operating during the pilot test
Flow Rate
Average Flow Rate: 37 gpm pilot -scale. 1.6 gpm each per model
Material of Construction
Riser to be constructed of Schedule 40 PVC, Schedule 80 PVC, or carbon steel with 304L stainless steel wire -wrapped screen
Borehole Depth
Varies
Well Pumps
1/2 to 1.5 HP electric submersible well pump (e.g. Grundfos Redi-Flo 4 or similar
Well Protection
Above -ground well features to be protected by fiberglass insulated structure. Shut-off valve at wellhead enclosed in the insulated structure. In ground traffic rated vaults in vehicular areas
Riser Pie
1 to 1.5-inch HDPE riser pipe from pump (sized to match um
Instrumentation
All instrumentation/controls (flow meters/totalizers, pressure gauges, flow control valves, etc.) to be installed within control and monitoring enclosure to the extent practical. Use same and
common brands for buying power and O&M efficiency. Groundwater infiltration controlled by a PLC with HMI.
Infiltration Wells
Number of Wells
23pilot-scale
Flow Rate
Average Flow Rate: 37 gpm pilot -scale. 1.6 gpm each per model
Material of Construction
Riser to be constructed of Schedule 40 PVC, Schedule 80 PVC, or carbon steel with 304L stainless steel wire -wrapped screen
Borehole Depth
Varies
Delivery Pumps
Above grade centrifugal pumps with pressure switch
Well Protection
Above -ground well features to be protected by fiberglass insulated structure. Shut-off valve at wellhead enclosed in the insulated structure.
Drop Pie
1-inch HDPE pipe with spring loaded check valve.
Instrumentation
All instrumentation/controls (flow meters/totalizers, pressure gauges, flow control valves, etc.) to be installed within control and monitoring enclosure.
Groundwater infiltration controlled by a PLC with HMI. Use same and common brands for buying power and O&M efficiency..
Infiltration Water Treatment System
Generalized
Description
The infiltration water treatment system will treat surface water from the fire service water main prior to conveying to infiltration wells.
Control and Monitoring Enclosure
Construction
Modified intermodal container or pre -fabricated structure installed on and anchored to compacted gravel base with appropriate sized berm for secondary containment if required).
Holding Tank
Two equalization tanks for both the groundwater extraction system and clean water infiltration system. Sized for future expansion capacity and installed adjacent to the control and monitoring
enclosures.
Other
Propane/fuel
Not required, all heating to be electrical -resistance
Potable Water
TBD. Discuss with CCP operators
Life Safety
Who provides first aid, fire extinguishers, eye wash. Enclosures must have 2 means of clear access and egress.
Lighting
Available in enclosures. The need for exterior or safety lighting to be determine during design.
Sewer
Not required
Security
All systems protected by keyed locks andpasswords; no video surveillance or fencing assumed
Notes:
amsl - above mean sea level
bgs - below ground surface
CAP - Corrective Action Plan
ft - feet
gpm - gallons per minute
HMI - human -machine interface
HP - horsepower
HPDE - high density polyethylene
PLC - programmable logic controller
PVC - polyvinyl chloride
SS - stainless steel
TDS - total dissolved solids
AECOM Page 2 of 2

Table 4-2
Well Construction Details
Belews Creek Steam Station Pilot Test Work Plan
Duke Energy Carolinas, LLC, Belews Creek, NC
Well ID Easting
.:
EX-13 1681172.60
Northing
.:
928533.60
Approximate Ground
765
OperationalVertical
Level Maintained
160
th
190
ft
180
Screen ..
160
Screen
20
Extraction Wells
Filter Pack
.. (ft BGS)
40
Depth (ft
156
A (in) B (ft)
6 10
C (ft)
20
D (ft) E (ft) F (ft)
150 3 37
G (in)
18
H (ft)
190
Targeted Flow Zones
Saprolite/Transition Zone/Bedrock
Simula ed Flow
t
..
1.6
EX-14
1681190.50
928602.40
755
150
180
170
150
20
30
146
6
10
20
150 3 27
18
180
Saprolite/Transition Zone/Bedrock
1.6
EX-17
1681211.40
928653.20
741
171
201
191
171
20
16
167
6
10
20
185 3 13
18
201
Saprolite/Transition Zone/Bedrock
1.6
EX-18
1681240.19
928483.73
764
159
189
179
159
20
39
155
6
10
20
150 3 36
18
189
Saprolite/Transition Zone/Bedrock
1.6
EX-20
1681262.23
928706.96
743
173
203
193
173
20
18
169
6
10
20
185 3 15
18
203
Saprolite/Transition Zone/Bedrock
1.6
EX-21
1681269.25
928519.59
751
146
176
166
146
20
26
142
6
10
20
150 3 23
18
176
Saprolite/Transition Zone/Bedrock
1.6
EX-22
1681273.10
928573.50
746
141
171
161
141
20
21
137
6
10
20
150 3 18
18
171
Saprolite/Transition Zone/Bedrock
1.6
EX-23
1681286.55
928539.69
748
143
173
163
143
20
23
139
6
10
20
150 3 20
18
173
Saprolite/Transition Zone/Bedrock
1.6
EX-25
1681290.50
928605.80
751
146
176
166
146
20
26
142
6
10
20
150 3 23
18
176
Saprolite/Transition Zone/Bedrock
1.6
EX-26
1681294.76
928627.42
751
146
176
166
146
20
26
142
6
10
20
150 3 23
18
176
Saprolite/Transition Zone/Bedrock
1.6
EX-28
1681317.80
928646.70
756
151
181
171
151
20
31
147
6
10
20
150 3 28
18
181
Saprolite/Transition Zone/Bedrock
1.6
EX-29
1681323.30
928526.10
750
140
170
160
140
20
25
136
6
10
20
145 3 22
18
170
Saprolite/Transition Zone/Bedrock
1.6
EX-30
1681330.10
928615.00
757
147
177
167
147
20
32
143
6
10
20
145 3 29
18
177
Saprolite/Transition Zone/Bedrock
1.6
EX-32
1681334.00
928690.20
755
150
180
170
150
20
30
146
6
10
20
150 3
27
18
180
Saprolite/Transition Zone/Bedrock
1.6
EX-34
1681348.60
928659.50
761
156
186
176
156
20
36
152
6
10
20
150 3
33
18
186
Saprolite/Transition Zone/Bedrock
1.6
EX-35
1681352.20
928759.40
754
149
179
169
149
20
29
145
6
10
20
150 3 26
18
179
Saprolite/Transition Zone/Bedrock
1.6
EX-36
1681358.80
928721.20
757
152
182
172
152
20
32
148
6
10
20
150 3 29
18
182
Saprolite/Transition Zone/Bedrock
1.6
EX-37
1681369.04
928801.78
749
149
179
169
149
20
24
145
6
10
20
155 3 21
18
179
Saprolite/Transition Zone/Bedrock
1.6
EX-38
1681370.90
928608.50
765
155
185
175
155
20
40
151
6
10
20
145 3
37
18
185
Saprolite/Transition Zone/Bedrock
1.6
EX-39
1681380.70
928691.60
763
158
188
178
158
20
38
154
6
10
20
150 3
35
18
188
Saprolite/Transition Zone/Bedrock
1.6
EX-40
1681382.38
928785.37
754
149
179
169
149
20
29
145
6
10
20
150 3
26
18
179
Saprolite/Transition Zone/Bedrock
1.6
EX-41
1681384.89
928759.74
758
153
183
173
153
20
33
149
6
10
20
150 3
30
18
183
Saprolite/Transition Zone/Bedrock
1.6
EX-42
1681387.80
928860.80
739
139
169
159
139
20
14
135
6
10
20
155 3
11
18
169
Saprolite/Transition Zone/Bedrock
1.6
EX-43
1681393.05
928790.72
754
154
184
174
154
20
29
150
6
10
20
155 3
26
18
184
Saprolite/Transition Zone/Bedrock
1.6
EX-44
1681394.10
928725.20
761
156
186
176
156
20
36
152
6
10
20
150 3
33
18
186
Saprolite/Transition Zone/Bedrock
1.6
EX-45
1681400.28
928616.48
767
157
187
177
157
20
42
153
6
10
20
145 3
39
18
187
Saprolite/Transition Zone/Bedrock
1.6
EX-46
1681403.49
928799.54
751
151
181
171
151
20
26
147
6
10
20
155 3
23
18
181
Saprolite/Transition Zone/Bedrock
1.6
EX-47
1681420.89
928834.24
746
146
176
166
146
20
21
142
6
10
20
155 3
18
18
176
Saprolite/Transition Zone/Bedrock
1.6
Notes:
1. Al depths are approximated and may change depending on site conditions.
2. Foowrates are average flowrates from simulations and approximate and may change depending on site conditions.
3. Operational water levels are approximate and may change depending on site conditions.
4. Easting and Northing projected in NAD 83 - North American Datum 1983
5. Elevations in NAVD 88 - North American Vertical Datum of 1988
6. Extraction wells EX-13, EX-14, EX-17, EX-20, and EX-42 will be installed but not operated during the pilot test.
ft - feet
ft BGS - feet below ground surface
gpm - gallons per minute
in - inches
Page 1 of 2

Table 4-2
Well Construction Details
Belews Creek Steam Station Pilot Test Work Plan
Duke Energy Carolinas, LLC, Belews Creek, NC
Well ID
IW-28
Easting
(NAD 83)
1681265.12
Northing
(NAD 83)
928476.59
Approximate
Surface Elevation
(feet, NAVD 88)
760
(ft of Head Above
Ground Surface)
10
Depth
(ft BGS)
170
Bottom
BGS)
170
Vertical Infiltration
Screen .. (ft
BGS)
150
Wells
Screen
Length (ft
20
Filter Pack)
..
147
. •
Targeted Flow Zones
170 Saprolite/Transition Zone/Bedrock
.. .
Simulated Flow
1.6
6
20 135
3
32
18
IW-30
1681271.50
928490.30
760
10
170
170
150
20
147
6
20
135
3
32
18
170
Saprolite/Transition Zone/Bedrock
1.6
IW-31
1681283.10
928508.33
756
10
165
165
145
20
142
6
20
134
3
28
18
165
Saprolite/Transition Zone/Bedrock
1.6
IW-33
1681294.40
928524.50
749
10
160
160
140
20
137
6
20
136
3
21
18
160
Saprolite/Transition Zone/Bedrock
1.6
IW-35
1681302.14
928537.95
748
10
160
160
140
20
137
6
20
137
3
20
18
160
Saprolite/Transition Zone/Bedrock
1.6
IW-38
1681312.20
928552.20
751
10
160
160
140
20
137
6
20
134
3
23
18
160
Saprolite/Transition Zone/Bedrock
1.6
IW-39
1681319.07
928565.45
754
10
165
165
145
20
142
6
20
136
3
26
18
165
Saprolite/Transition Zone/Bedrock
1.6
IW-44
1681333.90
928582.40
756
10
165
165
145
20
142
6
20
134
3
28
18
165
Saprolite/Transition Zone/Bedrock
1.6
IW-45
1681336.10
928636.60
757
10
170
170
150
20
147
6
20
138
3
29
18
170
Saprolite/Transition Zone/Bedrock
1.6
IW-48
1681345.52
928602.48
761
10
170
170
150
20
147
6
20
134
3
33
18
170
Saprolite/Transition Zone/Bedrock
1.6
IW-51
1681356.10
928618.30
761
10
170
170
150
20
147
6
20
134
3
33
18
170
Saprolite/Transition Zone/Bedrock
1.6
IW-53
1681357.10
928676.20
759
10
170
170
150
20
147
6
20
146
3
21
18
170
Saprolite/Transition Zone/Bedrock
1.6
IW-54
1681365.61
928634.21
761
10
170
170
150
20
147
6
20
146
3
21
18
170
Saprolite/Transition Zone/Bedrock
1.6
IW-59
1681375.10
928649.00
765
10
175
175
155
20
152
6
20
151
3
21
18
175
Saprolite/Transition Zone/Bedrock
1.6
IW-62
1681386.77
928662.77
765
10
175
175
155
20
152
6
20
151
3
21
18
175
Saprolite/Transition Zone/Bedrock
1.6
IW-63
1681399.50
928683.90
766
10
175
175
155
20
152
6
20
151
3
21
18
175
Saprolite/Transition Zone/Bedrock
1.6
IW-65
1681411.10
928700.86
766
10
175
175
155
20
152
6
20
151
3
21
18
175
Saprolite/Transition Zone/Bedrock
1.6
IW-67
1681426.97
928729.42
764
10
175
175
155
20
152
6
20
151
3
21
18
175
Saprolite/Transition Zone/Bedrock
1.6
IW-68
1681439.32
928749.31
763
10
175
175
155
20
152
6
20
151
3
21
18
175
Saprolite/Transition Zone/Bedrock
1.6
IW-69
1681446.01
928763.27
759
10
175
175
155
20
152
6
20
151
3
21
18
175
Saprolite/Transition Zone/Bedrock
1.6
IW-70
1681457.82
928775.31
759
10
175
175
155
20
152
6
20
151
3
21
18
175
Saprolite/Transition Zone/Bedrock
1.6
IW-71
1681469.52
928791.21
761
10
175
175
155
20
152
6
20
151
3
21
18
175
Saprolite/Transition Zone/Bedrock
1.6
IW-72
1681480.42
928810.51
757
10
175
175
155
20
152
6
20
151
3
21
18
175
Saprolite/Transition Zone/Bedrock
1.6
Notes:
1. All depths are approximated and may change depending on site conditions.
2. Flowrates are average flowrates from simulations and approximate and may change depending on site conditions.
3. Operational water levels are approximate and may change depending on site conditions.
4. Easting and Northing projected in NAD 83 - North American Datum 1983
5. Elevations in NAVD 88 - North American Vertical Datum of 1988
ft - feet
ft BGS - feet below ground surface
gpm - gallons per minute
in -inches
2 of 2

Table 4-3
Monitoring Plan Summary
Belews Creek Steam Station Pilot Test Work Plan
Duke Energy Carolinas, LLC, Belews Creek, NC
Monitoring Program
Field
Parameters Alkalinity Aluminum Arsenic
Semi -Annual Sampling' Z
Bicarbonate 3 3 Ferrous
Beryllium Alkalinity Boron Calcium Chloride Cobalt Iron Iron Lithium Magnesium
Nitrate + Total Dissolved Total Organic
Manganese Nitrite Potassium Sodium Strontium Sulfate Thallium Solids3 Carbon
Downgradient Flow Path 2
Monitoring Wells
Pilot Test Remediation
Monitoring
Plan
Downgradient Flow Path 1
Monitoring Wells
Full Scale Remediation
Monitoring
Plan
�
000000000000000000000
0
000000000000000000000
0
. �
000000000000000000000
0
000000000000000000000
0
.:.
000000000000000000000
0
000000000000000000000
0
�
Downgradient Flow Path 3
000000000000000000000
Monitoring Wells
0
AECOM Page 1 of 2

Table 4-3
Monitoring Plan Summary
Belews Creek Steam Station Pilot Test Work Plan
Duke Energy Carolinas, LLC, Belews Creek, NC
FMonitoring Program
Field
Parameters Alkalinity
Aluminum Arsenic
Semi -Annual Samplingt'Z
Bicarbonate s s Ferrous Nitrate +
Beryllium alkalinity Boron Calcium Chloride Cobalt Iron Iron Lithium Magnesium Manganese Nitrite
Potassium Sodium
Strontium Sulfate
Total Dissolved Total Organic
Thallium Solids3 Carbon
Downgradient and Sidegradient Monitoring Wells
• : 000000000000000000000
Full Scale Remediation Monitoring Plan
0
• :
000000000000000000000
0
'
000000000000000000000
0
• �
000000000000000000000
0
000000000000000000000
0
000000000000000000000
0
�
000000000000000000000
0
•:
000000000000000000000
0
• �
000000000000000000000
0
000000000000000000000
0
�
000000000000000000000
0
000000000000000000000
0
000000000000000000000
0
�
000000000000000000000
0
Background Monitoring Wells°
Notes
' The number of monitoring wells and parameters may be adjusted based on additional data and the effects of corrective action.
2 Groundwater standards may be modified over time in accordance with 02L .0106(k)
3 Geochemically non -reactive constituents (i.e., conservative corrective action COIs) that best depict the areal extent of the plume; monitors plume stability and physical attenuation
4 Approved background groundwater monitoring locations
Field Parameters - Water level, specific conductivity, temperature, pH, oxidation reduction potential and dissolved oxyg,
Italicized parameters - parameters for water quality to evaluate monitoring data quality
AECOM Page 2 of 2

Pilot Test Work Plan
Figures
AECOM

DAN RIVER
�y. rV 1 f r� I � • 'r - �
ASH BASIN GEOGRAPHIC LIMITATION •
4.
• p ASH BASIN � —
PARCEL LINE
.� 11
LINED RETENTION1
f BASIN
C f
' I
f �,
wo COAL PILE L `7
Jo I /d
I r yr r BELEWS CREEK STEAM STATION
] ✓`• �� PINE HALL
ROAD LANDFILL` Y (CLOSED)_ } STRUCTURAL FILL
(CLOSED)
ypRTIM _ _ __ •-_._ Cif rFGDLANDFILL
)i Lt�l L_—�J �� � �-✓ `. { � � � � ' CRAIG ROAD I _
^—✓� r ` � �•� . ` � LANDFILL_ --� � -s I — i E
.s
C f
NOTES:
1. 2016 USGS TOPOGRAPHIC MAP, BELEWSLAKE QUADRANGLE, r
OBTAINED FROM THE USGS STORE AT Mips://srore.usgs.gov/map-locator. y l �, ` ~ �/ I ` �-y ~t•y { -
2. THE LOCATIONS OF ALL BOUNDARIES,REMEDIATIONAND MONITORING WELLS, AND WETLANDS
- 1J/ WERE PROVIDED BY SYNTERRA CORIPORATION AND O201 )RIGINALLY DOCUMENTED IN THE V
COMPLANCEFORON PLANTHE EL WSCR-ATEEEDKASHBASBERINBVDECEMBER3AND THE K1,2019ONS TECHNICCAL2L •� �'
MEMORANDUM (MARCH 2O20)AND SHOULD BE CONSIDEREDAPPRO%IMATE. `I i
STOKES FIGURE 1-1 3
DUKE COUNTY SITE LOCATION
ENERGY BELEWS CREEK STEAM STATION
W/NSTON-SALEM PILOT TEST WORK PLAN
BELEWS CREEK, NORTH CAROLINA
ASHEV/LLE
• CHARLOTTE DRAWN BY: T. EISCHEN DATE: 05/05/2020 GRAPHIC SCALE
- REVISED BY: DATE: 1,000 0 1,000 2,000
CHECKED BY: DATE:
APPROVED BY: DATE: (IN FEET)
PROJECT MANAGER:

c
A
n
:.
n
a
Tv
z
W
Y
oD
(6 0
oU
o[---
N U
oW
N LU
-6O
a)ry
o�
i1 -1
Cn z
W
73
�U
00
(0
0
o�
o Y
N z
00
co
Y Z_
0 0°
U)O
z
m -
Ow
�C/)
-U
a>
(n cu
n3
J L.L
PINE HALL
ROAD LANDFILL
(CLOSED)
WET WELL DISCHARGE LINE
TO NPDES PERMITTED
OUTFALL #006
/
� / I
STRUCTURAL FILL
(CLOSED)
UUHL r1LC
EXISTING 8" DIP
FIRE MAIN
I,
BELEWS CREEK
STEAM STATION
BELEWS LAKE
LEGEND
Duke Energy Carolinas Belews
Creek Plant Site Boundary
Ash Basin Waste Boundary
— - Ash Basin Geographic Limitation
— — — — — — Unnamed Unpaved Roads
= = = = = Stream
Wetland (AMEC NRTR)
SOURCE NOTES
1. The aerial photograph was taken from Google Earth,
dated 2020-02-03.
2. The locations of all boundaries and monitoring wells
were provided by Synterra Corporation and originally
documented in the Corrective Action Plan Update
(December 2019).
3. The locations of all remediation wells were provided
by Synterra Corporation and should be considered
approximate.
4. The locations of streams and wetlands were originally
documented in the 2015 AMEC Natural Resources
Technical Reports.
400 0 400 800
SCALE IN FEET: 1" = 400'
P"=COM
PROJECT
BELEWS CREEK STEAM
STATION PILOT TEST
WORK PLAN
BELEWS CREEK STEAM STATION
3195 Pine Hall Road
Belews Creek, North Carolina 27009
PREPARED FOR
DUKE ENERGY (OWNER)
3195 Pine Hall Road
Belews Creek, North Carolina 27009
PREPARED BY
AECOM
1600 Perimeter Park Drive, Suite 400
Morrisville, North Carolina 27560
919.461.1100 tel [phone] fax
www.aecom.com
REGISTRATION
ISSUE / REVISION
3
2020-06-23
ISSUE AS FINAL
2
2020-06-04
ISSUE AS DRAFT
1
2020-05-07
ISSUE AS DRAFT
0
2020-05-06
FOR INTERNAL REVIEW
I/R
DATE
DESRIPTION
DATE
2020-06-04
PROJECT NUMBER
60629990
SHEET TITLE
1-2
GENERAL SITE MAP
SHEET NUMBER

LEGEND
c
A
roll
w
o Y
cfl �
oC
o�
NU
ow
N LU
-6O
a)n-
on
J z
w
73
�U
00
0
o,
o Y
00
co
Y Z_
om
U)O
z
m -
Ow
0� C/)
_U
a�
Ccu
3 LL
� 11
li \
( II GROUNDWATER �` \
\ EXTRACTION
! t II DISCHARGE LINE
(APPROXIMATELY 670 LF )
I
l II ® ®0
/ I
\ O I
I �° °
\ O 00 OVA 00 O
A 00
000 A 0
O A 0A
A O A O /� ❑
(� OA° 0 / ❑
0N. O
O °%°� A 1•O �0
I 18
AQDO
o
I
I �
I I
� II
I �
I
�O
o
2
<0 `
013 \�
II
I'
/
/
/11 0
/ O
O
/
O
r °
G
I
PINE HALL
ROAD LANDFILL
(CLOSED)
I 0 O
0 �O
C \\
00
WET WELL DISCHARGE LINE
TO NPDES PERMITTED
OUTFALL #006
O
O
09RO O
O
° O� O
04
O
WET WELL
DAM CK)
EVOQUA WATER TECHNOLOGIES
TREATMENT SYSTEM
PROPOSED GROUNDWATER
REMEDIATION SYSTEM
TREATMENT AREA
m
ASH BASIN
0
•1
U
�a
® / �0� AD
® BELEWS LAKE
AMA
/ I
I
® 1
� I
J
O
O 0
1 /
y lO
�l °
O
jI COAL PILE
°
O •
1 � \
EXISTING 8" DIP
=� �0 FIRE MAIN
� �o
STRUCTURAL FILL
APPROXIMATE LOCATION OF (CLOSED)
PROPOSED INFILTRATION WATER
SUPPLY LINE (( BY OTHERS)
o °
0 II
0
BELEWS CREEK
STEAM STATION
�.\
I
Duke Energy Carolinas Belews
Creek Plant Site Boundary
Ash Basin Waste Boundary
— -
Ash Basin Geographic Limitation
— — — — —
— Unnamed Unpaved Roads
Stream
Wetland (AMEC NRTR)
■
Existing Extraction Well
•
Monitoring Well
Proposed Pilot Test Clean Water
Infiltration Well
A
Proposed Pilot Test Extraction Well
A
Proposed Full -Scale System Clean
Water Infilitration Well
O
Proposed Full -Scale System
Extraction Well
Proposed Groundwater Extraction
Discharge Line
Proposed Clean Water Infiltration
Supply Line (by others)
Boron Concentration NCAC 02L
Exceedances Contour (>700 pg/L)
Area Proposed for Remedial Action
SOURCE NOTES
1. The aerial photograph was taken from Google Earth,
dated 2020-02-03.
2. The locations of all boundaries and monitoring wells
were provided by Synterra Corporation and originally
documented in the Corrective Action Plan Update
(December 2019).
3. The locations of all remediation wells were provided
by Synterra Corporation and should be considered
approximate.
4. The locations of streams and wetlands were originally
documented in the 2015 AMEC Natural Resources
Technical Reports.
5. The limits of NCAC 02L boron exceedances was
provided by Synterra Corporation and originally
documented in the Corrective Action Plan Update
(December 2019).
400 0 400 800
SCALE IN FEET: 1" = 400'
P"=COM
PROJECT
BELEWS CREEK STEAM
STATION PILOT TEST
WORK PLAN
BELEWS CREEK STEAM STATION
3195 Pine Hall Road
Belews Creek, North Carolina 27009
PREPARED FOR
DUKE ENERGY (OWNER)
3195 Pine Hall Road
Belews Creek, North Carolina 27009
PREPARED BY
AECOM
1600 Perimeter Park Drive, Suite 400
Morrisville, North Carolina 27560
919.461.1100 tel [phone] fax
www.aecom.com
REGISTRATION
ISSUE / REVISION
4
2020-06-23
ISSUE AS FINAL
3
2020-06-04
ISSUE AS DRAFT
2
2020-05-15
REV. PIPING LAYOUT
1
2020-05-07
ISSUE AS DRAFT
0
2020-05-06
FOR INTERNAL REVIEW
I/R
DATE
DESRIPTION
DATE
2020-06-04
PROJECT NUMBER
60629990
SHEET TITLE
2-1
CORRECTIVE ACTION PLAN SITE MAP
SHEET NUMBER

0
J
0
Q
Q
75
0
U
N
L
U
ry
V
L
a�
0
LM
0
0
E
0
0
E
0
0
0
0
U
N
0
n
w
� Y
o �
c..6 o
oU
p
N ~
oU
N w
a)n-
0n
a-
Cn
J Z
w
73
�U
00
o�
oY
oz
N0
y-z
0 0°
U)O
z
m -
Ow
e' CO
�U
m
>M E
C/) m
J LL
\\
1�
I
I
��
II
I
II
I
\
II
11
\\
If
\ \
II
�\
Co
O
\
O
\
1 O
O
O
O
,.
A
O
O
O
O
O
A
A
O
O
O
p
\\ O °
0 \\
\\ O
L
0
QD O
C7
O °
A O A
O
A
A
A O A
O p
O 0 , le:
OA Op� A � .
0
O O O �♦
A A A ♦,�
O 0♦ O
0 A O A A i A °
O 0
A A A p0
i
A O 0p°1A 0
A O° A% 0
O O
0 O A
A o
O \
. O A
O
O
° A O
C7
i
0
i If
O
O�
i ❑
PILOT TEST AREA /
0 ACCESS POINT cDi
i
O
i
i
7
EXISTING
DISCHARGE LINE
EVOQUA WATER TECHNOLOGIES
TREATMENT SYSTEM
GROUNDWATER EXTRACTION DISCHARGE
LINE (APPROXIMATELY 670 LF )
ROAD CROSSING (BY OTHERS AS PART
OF SEPARATE SCOPE)
El
PILOT TEST AREA ACCESS POINT
PROPOSED GROUNDWATER REMEDIATION
SYSTEM TREATMENT AREA
APPROXIMATE LOCATION
OF PROPOSED INFILTRATION
WATER SUPPLY LINE (BY OTHERS)
LEGEND
Duke Energy Carolinas Belews
Creek Plant Site Boundary
Ash Basin Waste Boundary
— — — — —
— Ash Basin Geographic Limitation
-----------
Unnamed Unpaved Roads
Stream
Wetland (AMEC NRTR)
■
Existing Extraction Well
•
Monitoring Well
♦
Proposed Clean Water Infiltration Well
O
Proposed Extraction Well
_ _
Proposed Groundwater Extraction
Discharge Line
Proposed Clean Water Infiltration
Supply Line (by others)
— — — —
Existing Discharge Line
Existing Discharge Line Manhole
Boron Concentration NCAC 02L
Exceedances Contour (>700 pg/L)
n
C�
l�J
1
O
O1d0o
°
A
A
O
__—
O
o
°
O
i
O A
O
Wk O
ASH BASIN
DAM
SOURCE NOTES
1. The aerial photograph was taken from Google Earth,
dated 2020-02-03.
2. The locations of all boundaries and monitoring wells
were provided by Synterra Corporation and originally
documented in the Corrective Action Plan Update
(December 2019).
3. The locations of all remediation wells were provided
by Synterra Corporation and should be considered
approximate.
4. The locations of streams and wetlands were originally
documented in the 2015 AMEC Natural Resources
Technical Reports.
5. The limits of NCAC 02L boron exceedances was
provided by Synterra Corporation and originally
documented in the Corrective Action Plan Update
(December 2019).
WET WELL DISCHARGE LINE
TO NPDES PERMITTED
OUTFALL #006
WET WELL
• "0
Li
NOTES
1. Extraction wells EW-13, EW-14, EW-17, EW-20
and EW-42 will be installed with the pilot test wells,
but will not be operated as part of the pilot test.
2. The distribution of boron concentrations greater than
the NCAC 02L boron groundwater standard of
700 pg/L represents the maximum horizontal and
vertical extent of NCAC 02L groundwater exceedances
outside of ash basin geographic limitation and is
therefore used as a visual representation of the
maximum extents of NCAC 02L exceedances.
100 0 100 200
SCALE IN FEET: 1" = 100'
L=Com
PROJECT
BELEWS CREEK STEAM
STATION PILOT TEST
WORK PLAN
BELEWS CREEK STEAM STATION
3195 Pine Hall Road
Belews Creek, North Carolina 27009
PREPARED FOR
DUKE ENERGY (OWNER)
3195 Pine Hall Road
Belews Creek, North Carolina 27009
PREPARED BY
AECOM
1600 Perimeter Park Drive, Suite 400
Morrisville, North Carolina 27560
919.461.1100 tel [phone] fax
www.aecom.com
REGISTRATION
ISSUE / REVISION
4
2020-06-23
ISSUE AS FINAL
3
2020-06-04
ISSUE AS DRAFT
2
2020-05-15
REV. PIPING LAYOUT
1
2020-05-07
ISSUE AS DRAFT
0
2020-05-06
FOR INTERNAL REVIEW
I/R
DATE
DESRIPTION
DATE
2020-06-04
PROJECT NUMBER
60629990
SHEET TITLE
2-2
CORRECTIVE ACTION PLAN WELL
LOCATIONS
SHEET NUMBER

JQ"=COM
m
2
a
a
-i�
Y
U
a)
L
L
r.,
n
n
.
z
n
w
V
D
0
r)
LL
w
J
w
m
ry
000
o U
,w
ory
o�
N �
-0p
� U
o w
�Q
J i
ry
�o
co w
�z
(6o
o—
o�
N z
o Q
N 0�
2E ry
zmOco
� ry
m cwn
�U
c>a E
�M
J L.L
EQUALIZATION
TANK 2
NOTE:
1. ANTICIPATED INFILTRATION WATER TREATMENT SYSTEM COMPONENTS ARE
PROVISIONAL. THE FINAL TREATMENT SYSTEM DESIGN WILL BE CONDUCTED FOLLOWING
ADDITIONAL SURFACE WATER SAMPLING. COMPOUNDS ADDED TO SOURCE WATER WILL
BE CONSUMED DURING THE TREATMENT PROCESS AND WILL NOT BE A COMPONENT OF
THE FINAL INFILTRATION WATER. ANALYTICAL SAMPLES WILL BE USED TO EVALUATE
INFILTRATION WATER TREATMENT SYSTEM EFFECTIVENESS PRIOR TO DELIVERY TO
GROUNDWATER.
CLEAN WATER INFILTRATION SYSTEM PROCESS FLOW DIAGRAM
EXTRACTION SYSTEM PROCESS FLOW DIAGRAM
PROJECT
BELEWS CREEK STEAM
STATION PILOT TEST
WORK PLAN
BELEWS CREEK STEAM STATION
3195 Pine Hall Road
Belews Creek, North Carolina 27009
PREPARED FOR
DUKE ENERGY (OWNER)
3195 Pine Hall Road
Belews Creek, North Carolina 27009
PREPARED BY
AECOM
1600 Perimeter Park Drive, Suite 400
Morrisville, North Carolina 27560
919.461.1100 tel [phone] fax
www.aecom.com
REGISTRATION
4
2020-06-231
ISSUE AS FINAL
3
2020-06-1 E
ISSUE AS DRAFT
2
2020-06-1
ISSUE AS DRAFT
1
2020-05-0
ISSUE AS DRAFT
0
2020-05-06
FOR INTERNAL REVIE
I/R
DATE
DESRIPTION
2020-04-29
PROJECT NUMBER
60442330
SHEET TITLE
GENERAL PROCESS FLOW DIAGRAM
SHEET NUMBER
4-1
W

0
J
a�
0
0_
0_
Q
75
0
0
a)
U
ry
V
a)
c
2)
0
T
.E
0
a)
0)
0
c
0
0
'0)
o
� 0
O
a
J
I
w
C0
}I
0
C0
�I
O
J_
d
I
N
�I
U
z
YI
w
w
ry
U
I
CO
w
J
w
m
I
w
Y
0
0
Q
U
C0
w
ry
cD
O
ry
z
I
O
U
W
al
CO
Q
w
V
w
w
ry
U
I
w
J
w
m
I
w
o�
c� 0
oC
o�
N H
oU
N LLJ
a)ry
O
a- �I
J z
w
c%� U
00
co
o�
oY
N 0
U)
Y Z_
0 0°
�O
z�
mry
Ow
�CO
�U
m
>M E
0 c�
U) m
J 11
IW-12 A
EX-7
O
A IW-10
IW-15 A
O EX-16
EX-11 O IW-27A
A
IW-16
A IW-13
EX-14
EX-13 O
EX-10 O
IW-17 A
j
0
IW-14 A
O
EX-24
EX-19
O
A IW-34
IW-64 A
GWA-21 D O
IW-55 A
O GWA-21 S
O EX-42
A IW-43 IW-57
A EX-47 IW-74 A
EX-31 O
♦ IW-
A IW-47 /
IW-52 A ♦
EX-33 O EX-37 IW-60
A EX-46 / IW-71
EX-43 /
IW-56 EX-40 C
A IW-40 IW-61 ,L IW-70� �
♦ i AIW-69�
EX-35 � EX-41 ' f
�IW-68
i
A IW-46 IW-58 / /
�'L O EX-61
EX-36 / jr,
/ IW-67 /
C1 EX-44
00
• EX-60 /
A IW-50 � �i
�i /� YA I W-65 / /
• EX-59/
4EX-32 / EX-39.
�� ♦ � � / IW-63
A I W-42 I W-5 3/ / EX-58 O /
EX-34� 1> b IW-62EX-/
r
/IW-45IW`9%•57 �� IW-54— EX-56
' I / I W-51 ` X-45
EX-30 EX-38\ / `\
\ / IW-48 \ I `%
goo
�b IW-44
EX-54 O
\ \ \ \\ \ \��\� �/� •\ ♦♦ \` \♦�` �/` �`I W-39EX -53 O
IW-38
'05
EX-23 �A IW-3IW-3`X9♦ IW-19 E-2
EX-21 IW-31 1
; \
\
\
\
I
\ IW-24 ♦
\ ')O�L I W-30
EX-18 A IW-28\
\ , i IW-26 A GWA-27BR
\ \ GWA-27S d
\ /0
IW-22 p i \ \ GWA-27D /
VAI
O EX-17
IW-25 A
O
EX-20
EX-27 O
IW-36 A
A
IW-32
EX-28
I W-37
A A
I W-29 EX-26
EX-25
EX-22
IW-75
GWA-11 D
IW-76 AO O
GWA-11 S
116.
/
I 0
tpi
\ o /
Jr
\ AREA FOR FUTURE FULL-SCALE /
\ �r GROUNDWATER EXTRACTION /
\ r MANIFOLD BUILDINGS /
\r /
i ♦
GROUNDWATER EXTRACTION /
r DISCHARGE LINE (APPROX. 670 LF) /
(TO EXISTING TREATMENT
r SYSTEM, SEE DRAWING 2-2) / / GWA-20S
r i / GWA-20SA
r / /
r PILOT TEST GROUNDWATER GWA-20D
r EXTRACTION MANIFOLD BUILDING / GWA-20BR O /
rr (20'x8' CONEX BOX)
EQ TANK (8' DIAMETER)
ON CONCRETE PAD / OO ♦ /
Z�%% i
r
r / / ROAD CROSSING (BY /
OTHERS AS PART OF
SEPARATE SCOPE) /
�b`
EQ TANK (8' DIAMETER) �
ON CONCRETE PAD `.` ♦ / j / EX ❑
INFILTRATION WATER � ♦ / / /
TREATMENT AREA �♦ `
(50'X40' AREA) PILOTTEST AR
`�
PILOT TEST INFILTRATION ACCESS EA `,♦ // // /
WATER MANIFOLD BUILDING POINT
(20'x8' CONEX BOX) /
APPROXIMATE LOCATION
OF PROPOSED INFILTRATION
WATER SUPPLY LINE (BY / EX-05 ❑ /
OTHERS)
AREA FOR FUTURE
FULL-SCALE
INFILTRATION WATER
MANIFOLD BUILDINGS
O EXOB-2 /
EX-06 ❑ i
LEGEND
Duke Energy Carolinas Belews
Creek Plant Site Boundary
— — — — —
— Ash Basin Geographic Limitation
-----------
Unnamed Unpaved Roads
750
Contour Line (20' interval)
— — — — —
— Intermediate Contour Line (4' interval)
❑
Existing Extraction Well
•
Effectiveness Monitoring Well
♦
Proposed Pilot Test Clean Water
Infiltration Well
O
Proposed Pilot Test Extraction Well
♦
Proposed Full -Scale System Clean
Water Infiltration Well
•
Proposed Full -Scale System
Extraction Well
Extraction Well Piping
Injection Well Piping
C
Area of Pipe Crossing, Concrete
Encased
Proposed Groundwater Extraction
Discharge Line
Proposed Clean Water Infiltration
Supply Line (by others)
NOTES
1. Extraction wells EW-13, EW-14, EW-17, EW-20
and EW-42 will be installed with the pilot test wells,
but will not be operated as part of the pilot test.
2. Monitoring wells which are not a part of the proposed
Effectiveness Monitoring Program are not shown.
3. Final installation locations may be adjusted based
on site conditions.
SOURCE NOTES
1. The aerial photograph was taken from Google Earth,
dated 2020-02-03.
2. The locations of all boundaries and monitoring wells
were provided by Synterra Corporation and originally
documented in the Corrective Action Plan Update
(December 2019).
3. The locations of all remediation wells were provided
by Synterra Corporation and should be considered
approximate.
4. The locations of streams and wetlands were originally
documented in the 2015 AMEC Natural Resources
Technical Reports.
5. The contours were taken from NC One Map,
published by the NCDOT - GIS Unit, dated
2013-11-01. The contours may not be exact and
may contain small errors over open water or sounds.
30 0 30 60
SCALE IN FEET: 1" = 30'
L=Com
PROJECT
BELEWS CREEK STEAM
STATION PILOT TEST
WORK PLAN
BELEWS CREEK STEAM STATION
3195 Pine Hall Road
Belews Creek, North Carolina 27009
PREPARED FOR
DUKE ENERGY (OWNER)
3195 Pine Hall Road
Belews Creek, North Carolina 27009
PREPARED BY
AECOM
1600 Perimeter Park Drive, Suite 400
Morrisville, North Carolina 27560
919.461.1100 tel [phone] fax
www.aecom.com
REGISTRATION
ISSUE / REVISION
5
2020-06-23
ISSUE AS FINAL
4
2020-06-04
ISSUE AS DRAFT
3
2020-05-15
REV. TREAT. AREA LAY(
2
2020-05-14
REV. GW EXTRACT. LINE
1
2020-05-08
ISSUE AS DRAFT
0
2020-05-06
FOR INTERNAL REVIEW
I/R
DATE
DESRIPTION
DATE
2020-06-04
PROJECT NUMBER
60629990
SHEET TITLE
4-2
PILOT TEST SYSTEM LAYOUT
SHEET NUMBER
)UT

FIBERGLASS INSULATED
ABOVE GRADE STRUCTURE
ALUMINUM SANITARY WELL
CAP WITH SEAL, TYR
1.5 IN STILLING WELL
1 IN 1304L SS PITILESS
DAPTOR
ADAPTOR----.
CONCRETE PAD
I
1 IN 304L SS PIPE TO
EAL
ABOVE WELL SEAL----.
c�
MANIFOLD
1 IN SS UNION
CONTAINMENT
CURB
1 IN HDPE TRANSITION FITTING
THREADED
WEEPHOLE
II
I
II
I iI
I
II
I
I
II
1 IN HDPE PIPE
II
I
II
I
61N WELL CASING
I
I
I
ELECTRIC POWER CABLE -
II
I
I
I
101N BOREHOLE
II
I
I
BENTONITE GROUT I I
BENTONITE SEAL w
II
I
II
FILTER PACK SILICA SAND (20/30)
I
I _
II
u 61N 304L SS WIRE -WRAPPED SCREEN
(0.010 INCH SLOT) THREADED ONTO
CASING FOR RISER
U
� MOLDED RUBBER TORQUE ARRESTOR
u
0
ul 1 IN HDPE TRANSITION FITTING
n
SUBMERSIBLE PUMP
u
m
0
r 6 IN WELL CASING
SUMP
u
[ FLAT BOTTOM SS THREADED PLUG AT
BOTTOM OF SCREEN
i
u
n
c
TYPICAL
EXTRACTION WELL DETAIL
NOT TO SCALE
NOTES:
1. ALL DEPTHS ARE APPROXIMATED AND MAY CHANGE DEPENDING ON SITE CONDITIONS.
2. FLOWRATES ARE AVERAGE FLOWRATES FROM SIMULATIONS AND APPROXIMATE AND MAY CHANGE DEPENDING ON
SITE CONDITIONS.
3. OPERATIONAL WATER LEVELS ARE APPROXIMATE AND MAY CHANGE DEPENDING ON SITE CONDITIONS.
4. IN - INCH
5. FT - FEET
6. FT BGS - FEET BELOW GROUND SURFACE
7. GPM - GALLONS PER MINUTE
8. NA - NOT APPLICABLE
9. EASTING AND NORTHING PROJECTED IN NAD 83 - NORTH AMERICAN DATUM 1983
10. ELEVATIONS IN NAVD 88 - NORTH AMERICAN VERTICAL DATUM OF 1988
Vertical Extraction Wells
Well
ID
Easting
(NAD 83)
Northing
(NAD 83)
Approximate
Ground Surface
Elevation
(feet, NAVD88)
Operational
Water Level
Naintained
In Well
(feet BGS)
Well
Depth
(ft BGS)
Screen
Bottom
(ft BGS)
Screen
Top
(ft BGS)
Screen
Length
(ft)
Filter
Pack Top
(ft BGS)
Top of
Pump
Depth
(ft BGS)
Well
Construction
Details
Targeted Flow Zones
Approximate
Simulated
Flow
(gPm)
A
in
B
(ft)
C
(ft)
D
(ft)
E
(ft)
F
(ft)
G
(in)
H
(ft)
IX-13
1681172.60
928533.60
765
160
190
180
160
20
40
156
6
SO
20
150
3
37
18
190
Sa rolite/Transition Zone/Bedrock
1.6
IX-14
1681190.50
928602.40
755
150
180
170
150
20
30
146
6
10
20
150
3
27
18
180
Sa rolite/Transition Zone/Bedrock
1.6
IX-17
1681211.40
928653.20
741
171
201
191
171
20
16
167
6
10
20
185
3
13
18
201
Sa rolite/Transition Zone/Bedrock
1.6
IX-18
1681240.19
928483.73
764
159
189
179
159
20
39
155
6
SO
20
150
3
36
18
189
Sa rolite/Transition Zone/Bedrock
1.6
IX-20
1681262.23
928706.96
743
173
203
193
173
20
18
169
6
SO
20
185
3
15
18
203
Sa rolite/Transition Zone/Bedrock
1.6
IX-21
1681269.25
928519.59
751
146
176
166
146
20
26
142
6
SO
20
150
3
23
18
176
Sa rolite/Transition Zone/Bedrock
1.6
IX-22
1681273.10
928573.50
746
141
171
161
141
20
21
137
6
10
20
150
3
18
18
171
Sa rolite/Transition Zone/Bedrock
1.6
IX-23
1681286.55
928539.69
748
143
173
163
143
20
23
139
6
10
20
150
3
20
18
173
Sa rolite/Transition Zone/Bedrock
1.6
IX-25
1681290.50
928605.80
751
146
176
166
146
20
26
142
6
SO
20
150
3
23
18
176
Sa rolite/Transition Zone/Bedrock
1.6
IX-26
1681294.76
928627.42
751
146
176
166
146
20
26
142
6
SO
20
150
3
23
18
176
Sa rolite/Transition Zone/Bedrock
1.6
IX-28
1681317.80
928646.70
756
151
181
171
151
20
31
147
6
SO
20
150
3
28
18
181
Sa rolite/Transition Zone/Bedrock
1.6
IX-29
1681323.30
928526.10
750
140
170
160
140
20
25
136
6
SO
20
145
3
22
18
170
Sa rolite/Transition Zone/Bedrock
1.6
IX-30
1681330.10
928615.00
757
147
177
167
147
20
32
143
6
10
20
145
3
29
18
177
Sa rolite/Transition Zone/Bedrock
1.6
IX-32
1681334.00
928690.20
755
150
180
170
150
20
30
146
6
10
20
150
3
27
18
180
Sa rolite/Transition Zone/Bedrock
1.6
IX-34
1681348.60
928659.50
761
156
186
176
156
20
36
152
6
10
20
150
3
33
18
186
Sa rolite/Transition Zone/Bedrock
1.6
IX-35
1681352.20
928759.40
754
149
179
169
149
20
29
145
6
10
20
150
3
26
18
179
Sa rolite/Transition Zone/Bedrock
1.6
IX-36
1681358.80
928721.20
757
152
182
172
152
20
32
148
6
10
20
150
3
29
18
182
Sa rolite/Transition Zone/Bedrock
1.6
IX-37
1681369.04
928801.78
749
149
179
169
149
20
24
145
6
10
20
155
3
21
18
179
Sa rolite/Transition Zone/Bedrock
1.6
IX-38
1681370.90
928608.50
765
155
185
175
155
20
40
151
6
10
20
145
3
37
18
185
Sa rolite/Transition Zone/Bedrock
1.6
IX-39
1681380.70
928691.60
763
158
188
178
158
20
38
154
6
10
20
150
3
35
18
188
Sa rolite/Transition Zone/Bedrock
1.6
IX-40
1681382.38
928785.37
754
149
179
169
149
20
29
145
6
10
20
150
3
26
18
179
Sa rolite/Transition Zone/Bedrock
1.6
IX-41
1681384.89
928759.74
758
153
183
173
153
20
33
149
6
10
20
150
3
30
18
183
Sa rolite/Transition Zone/Bedrock
1.6
IX-42
1681387.80
928860.80
739
139
169
159
139
20
14
135
6
10
20
155
3
11
18
169
Sa rolite/Transition Zone/Bedrock
1.6
IX-43
1681393.05
928790.72
754
154
184
174
154
20
29
150
6
10
20
155
3
26
18
184
Sa rolite/Transition Zone/Bedrock
1.6
IX-44
1681394.1212
28725.20
761
156
186
176
156
20
36
152
6
10
20
150
3
33
18
186
Sa rolite/Transition Zone/Bedrock
1.6
IX-45
1681400.28
928616.48
767
157
187
177
157
20
42
153
6
10
20
145
3
39
18
187
Sa rolite/Transition Zone/Bedrock
1.6
IX-46
1681403.49
928799.54
751
151
181
171
151
20
26
147
6
10
20
155
3
23
18
181
Sa rolite/Transition Zone/Bedrock
1.6
IX-47
1,1420.89
928834.24
746
146
176
166
146
20
21
142
6
10
20
155
3
1 18
18
11761
Sa rolite/Transition Zone/Bedrock
1 1.6
NOTES:
1. CONSTRUCTION DETAILS SHOWN ABOVE ARE APPROXIMATED AND WILL BE DETERMINED BASED ON FIELD DATA COLLECTED AT A LATER DATE.
2. NA - NOT AVAILABLE
3. REFER TO FIGURE 4-2 FOR WELL LOCATIONS.
A=COM
PROJECT
BELEWS CREEK STEAM
STATION PILOT STUDY
WORK PLAN
BELEWS CREEK STEAM STATION
3195 Pine Hall Road
Belews Creek, North Carolina 27009
PREPARED FOR
DUKE ENERGY (OWNER)
3195 Pine Hall Road
Belews Creek, North Carolina 27009
PREPARED BY
AECOM
1600 Perimeter Park Drive, Suite 400
Morrisville, North Carolina 27560
919.461.1100 tel [phone] fax
www.aecom.com
REGISTRATION
ISSUE / REVISION
2 2121-06-04 ISSUE AS DRAFT
1 2020-05-07 ISSUE AS DRAFT
0 1 2020-05-061 FOR INTERNAL REVIEW
DATE
2020-04-29
PROJECT NUMBER
60442330
SHEET TITLE
EXTRACTION WELL SCHEMATIC
SHEET NUMBER
4-3

m
EE
d
m
m
2
a`
FIBERGLASS INSULATED
ABOVE GRADE STRUCTURE
ALUMINUM SANITARY WELL
CAP WITH SEAL, TYP
1.5 INi
STILLING WELL
1 IN 316L SS PITILESS
ADAPTOR -.-
I IN 316E SS PIPE TO
14i
ABOVE WELL SEAL
MANIFOLD
11N SS UNION
CONCRETE
PAD
1 IN HDPE TRANSITION FITTING
I
11N HDPE DROP
61N CASING
101N BOREHOLE
BENTONITE
0
BENTONITE SEALS
FILTER PACK SILICA SAND (20/30)
1 IN HDPE TRANSITION FITTING-
1 IN SPRING LOADED CHECK VALVE
LEVEL TRANSDUCER
(DEPTH VARIES)
61N 304L SS
WIRE -WRAPPED SCREEN
(0.010 IN
SLOT) THREADED ONTO
CASING FOR RISER
FLAT BOTTOM
SS THREADED PLUG AT
LA-j
BOTTOM OF SCREEN
TYPICAL INFILTRATION WELL DETAIL
NOT TO SCALE
NOTES:
1. ALL DEPTHS ARE APPROXIMATED AND MAY CHANGE DEPENDING ON SITE CONDITIONS.
2. FLOWRATES ARE AVERAGE FLOWRATES FROM SIMULATIONS AND APPROXIMATE AND MAY CHANGE DEPENDING ON SITE
CONDITIONS.
3. OPERATIONAL WATER LEVELS ARE APPROXIMATE AND MAY CHANGE DEPENDING ON SITE CONDITIONS.
4. IN - INCH
5. FT - FEET
6. FT BGS - FEET BELOW GROUND SURFACE
7. GPM - GALLONS PER MINUTE
8. NA - NOT APPLICABLE
9. TYP - TYPICAL
10. EASTING AND NORTHING PROJECTED IN NAD 83 - NORTH AMERICAN DATUM 1983
11. ELEVATIONS IN NAVD 88 - NORTH AMERICAN VERTICAL DATUM OF 1988
12. WELL CASING SHALL BE SCHEDULE 40 PVC (FOR WELLS LESS THAN 130 FT BGS), SCHEDULE 80 PVC (FOR WELLS
GREATER THAN 130 FT BGS), CARBON STEEL OR STAINLESS STEEL.
13. A BENTONITE SEAL SHALL BE INSTALLED ABOVE THE TOP OF THE FILTER PACK AND CONSIST OF AT LEAST 3 FT OF
BENTONITE PELLETS, CHIPS OR ENGINEER APPROVED SLURRY.
14. A BOREHOLE ANNULUS BETWEEN THE BENTONITE SEAL AND THE GROUND SURFACE SHALL BE FILLED WITH A
BENTONITE-CEMENT SLURRY MIXED IN THE FOLLOWING RATIO: 50 LBS PORTLAND CEMENT, 2.5 LBS POWDERED BENTONITE
AND NO MORE THAN 5 GALLONS OF WATER.
Vertical Infiltration Wells
Well
ID
Approximate
Ground Surface
Elevation
(feet, NAVD 88)
Pressure at
Well Head
(ft of Head
Above Ground
Surface)
Well
Depth
(ft BGS)
Screen
Bottom
(ft BGS)
Screen
Top (ft
BGS)
Screen
Length
(ft)
Filter
Pack Top
(ft BGS)
Well Construction Details
Targeted Flow Zones
Approximate
Simulated
Flow
(gpm)
A
(in)
B
(ft)
C
(ft)
D
(ft)
E
(ft)
F
(in)
G
(ft)
IW-28
760
10
170
170
150
20
147
6
20
135
3
32
18
170
Sa rolite/Transition Zone/Bedrock
1.6
IW-30
760
10
170
170
150
20
147
6
20
135
3
32
18
170
Sa rolite ransition Zone Bedrock
1.6
IW-31
756
10
165
165
145
20
142
6
20
134
3
28
18
1651
Sa rolite/Transition Zone/Bedrock
1.6
IW-33
749
10
160
160
140
20
137
6
20
1361
3
21
18
1601
Sa rolite/Transition Zone/Bedrock
1.6
IW-35
748
10
160
160
140
20
137
6
20
1371
3
20
18
160
Sa rolite/Transition Zone/Bedrock
1.6
IW-38
751
10
160
160
140
20
137
6
20
1341
3
23
18
160
Sa rolite/Transition Zone/Bedrock
1.6
IW-39
754
10
165
165
145
20
142
6
20
1361
3
26
18
165
Sa rolite/Transition Zone/Bedrock
1.6
IW-44
756
10
165
165
145
20
142
6
20
1341
3
28
18
165
Sa rolite/Transition Zone/Bedrock
1.6
IW-45
757
10
170
170
150
20
147
6
20
138
3
29
18
170
Sa rolite/Transition Zone/Bedrock
1.6
IW-48
761
10
170
170
150
20
147
6
20
134
3
33
18
170
Sa rolite/Transition Zone/Bedrock
1.6
IW-51
761
10
170
170
150
20
147
6
20
134
3
33
18
170
Sa rolite/Transition Zone/Bedrock
1.6
IW-53
759
10
170
170
150
20
147
6
20
146
3
21
18
170
Sa rolite/Transition Zone/Bedrock
1.6
IW-54
761
10
170
170
150
20
147
6
20
146
3
21
18
170
Sa rolite/Transition Zone/Bedrock
1.6
IW-59
765
10
175
175
155
20
152
6
20
151
3
21
18
175
Sa rolite/Transition Zone/Bedrock
1.6
IW-62
765
10
175
175
155
20
152
6
20
151
3
21
18
175
Sa rolite/Transition Zone/Bedrock
1.6
IW-63
766
10
175
175
155
20
152
6
20
151
3
21
18
175
Sa rolite/Transition Zone/Bedrock
1.6
IW-65
766
10
175
175
155
20
152
6
20
151
3
21
18
175
Sa rolite ransition Zone Bedrock
1.6
IW-67
764
10
175
175
155
20
152
6
20
151
3
21
18
175
Sa rolite/Transition Zone/Bedrock
1.6
IW-68
763
10
175
175
155
20
152
6
20
151
3
21
18
175
Sa rolite/Transition Zone/Bedrock
1.6
IW-69
759
10
175
175
155
20
152
6
20
151
3
21
18
175
Sa rolite/Transition Zone/Bedrock
1.6
IW-70
759
10
175
175
155
20
152
6
20
151
3
21
18
175
Sa rolite/Transition Zone/Bedrock
1.6
IW-71
761
1 10
175
175
155
20
152
6
20
151
3
21
18
175
Sa rolite/Transition Zone/Bedrock
1.6
IW-72
757
10
175
175
155
20
152
6
1 20
1 151
3
21
1 18
1751
Sa rolite/Transition Zone/Bedrock
1.6
NOTES:
1. CONSTRUCTION DETAILS SHOWN ABOVE ARE APPROXIMATED AND WILL BE DETERMINED BASED ON FIELD DATA COLLECTED AT A LATER DATE.
2. NA - NOT AVAILABLE
3. REFER TO FIGURE 4-2 FOR WELL LOCATIONS.
A=COM
PROJECT
BELEWS CREEK STEAM
STATION PILOT STUDY
WORK PLAN
BELEWS CREEK STEAM STATION
3195 Pine Hall Road
Belews Creek, North Carolina 27009
PREPARED FOR
DUKE ENERGY (OWNER)
3195 Pine Hall Road
Belews Creek, North Carolina 27009
PREPARED BY
AECOM
1600 Perimeter Park Drive, Suite 400
Morrisville, North Carolina 27560
919.461.1100 tel [phone] fax
www.aecom.com
REGISTRATION
ISSUE / REVISION
2 2020-06-23 SSUE AS FINAL
1 2020-06 I
-05 SSUE AS DRAFT
0 2020-05-07 1 ISSUE AS DRAFT
DATE
2020-04-29
PROJECT NUMBER
60442330
SHEET TITLE
INFILTRATION WELL SCHEMATIC
SHEET NUMBER
4-4

LEGEND
I
a�
0
0-
0-
Ell
Aw
ry
V
c
2)
m
r)
.E
0)
0)
CU
C
CU
U
a)
�o
roll
w
� Y
o�
(6 0
oC
o�
NU
CD
w
N LU
-6O
a) ry
0 d
ill —1
in z
w
00
(D
o�
o Y
N z
CN 00
U)
Y Z_
0 0°
U)O
z
in - ry
Ow
�C/)
-0
a>
(n cu
� m
0
J L.L
NPDES PERMITTED
OUTFALL 4006
I \
7/7
I / �
WET WELL DISCHARGE \
/ I I LINE TO NPDES PERMITTED
.� OUTFALL #006 1 ��
IGROUNDWATER EXTRACTION
\ DISCHARGE LINE
\\ (TO EXISTING
TREATMENT
I [ SYSTEM)
l
I �
WET WELL
DAM
I / / EVOQUA WATER TECHNOLOGIES
IV TREATMENT SYSTEM
PROPOSED PILOT
TEST AREA ASH BASIN
0
2 \
<0
0
1
PINE HALL
ROAD LANDFILL
(CLOSED)
.�/ �//
,• /
L
APPROXIMATE LOCATION
OF PROPOSED INFILTRATION 1
WATER SUPPLY LINE (BY
IOTHERS)
�l y
STRUCTURAL FILL
(CLOSED)
LINED
RETENTION
BASIN
STFgMA
11�Oq
O
COAL PILE
EXISTING 8" DIP
FIRE MAIN
M
BELEWS CREEK
STEAM STATION
M
M
M
Duke Energy Carolinas Belews
Creek Plant Site Boundary
Ash Basin Waste Boundary
Ash Basin Geographic Limitation
— — — — — — Unnamed Unpaved Roads
Railroad Tracks
Stream
Wetland (AMEC NRTR)
Proposed Groundwater Extraction
Discharge Line
Proposed Clean Water Infiltration
Supply Line (by others)
Existing Discharge Line
Existing Discharge Line Manhole
SOURCE NOTES
1. The aerial photograph was taken from Google Earth,
dated 2020-02-03.
2. The locations of all boundaries and monitoring wells
were provided by Synterra Corporation and originally
documented in the Corrective Action Plan Update
(December 2019).
3. The locations of all remediation wells were provided
by Synterra Corporation and should be considered
approximate.
4. The locations of streams and wetlands were originally
documented in the 2015 AMEC Natural Resources
Technical Reports.
600 0 600 1,200
SCALE IN FEET: 1" = 600'
L=Com
PROJECT
BELEWS CREEK STEAM
STATION PILOT TEST
WORK PLAN
BELEWS CREEK STEAM STATION
3195 Pine Hall Road
Belews Creek, North Carolina 27009
PREPARED FOR
DUKE ENERGY (OWNER)
3195 Pine Hall Road
Belews Creek, North Carolina 27009
PREPARED BY
AECOM
1600 Perimeter Park Drive, Suite 400
Morrisville, North Carolina 27560
919.461.1100 tel [phone] fax
www.aecom.com
REGISTRATION
ISSUE / REVISION
4
2020-06-23
ISSUE AS FINAL
3
2020-06-04
ISSUE AS DRAFT
2
2020-05-15
REV. PIPING LAYOUT
1
2020-05-08
ISSUE AS DRAFT
0
2020-05-07
FOR INTERNAL REVIEW
I/R
DATE
DESRIPTION
DATE
2020-06-04
PROJECT NUMBER
60629990
SHEET TITLE
4-5
DISCHARGE TO NPDES OUTFALL MAP
SHEET NUMBER

—• I
GWA-24S/D/BR
CCR-6S/D/BW MW-20OS/[
GWA-30S/D I I • r ! • ..
i CCR-13S/D/BR
�� �� ► GWA-1S/D/BR 9
GWA-11S/D
GWA-21 S/D EX013-1
' GWA-20SA/D/BR
IGWA-27S/D/BR
GWA-31S/D ��
;
GWA-19SA/D/BR ♦ , CCR-2S/D
GWA-10SA/D GWA-18SA/D
1 io
o
:o
�z
o:
GWA-17S/D � f
MW-204S/D r
GWA-16S/DA/BR P
y
1
4 � i
I
/
/
` ♦/
OQ I %.
Imo••
I
i. BG-3S/D
I
OPO
MW-202S/D/BR 0
NOTES:
1.'-PROPOSED NEW WELL FOR EFFECTIVENESS MONITORING
2. FLOW PATH MONITORING LOCATIONS INCLUDE:
WASTE BOUNDARY WELLS,
b 250' FROM WASTE BOUNDARY WELLS
500'ASH BASIN GEOGRAPHIC LIMITATION WELLS
tl WELLS NO LESS THAN 1 YEAR TRAVEL TIME UPGRADIENT OF RECEPTOR AND NO GREATER THAN THE
DISTANCE GROUNDWATER IS EXPECTED TO TRAVEL IN FIVE YEARS
3. IF THE WASTE BOUNDARVAND ASH BASIN GEOGRAPHIC LIMITATION ARE LOCATED SUFFICIENTLY
CLOSE TO EVALUATE COI TRENDS OVERTIME, THE 25V INTERVAL LOCATION WOULD NOT BE
MONITORED.
4. BG-13.D, BG-2S.D/BRAAGJS.DAW-200S/D.HR APPROVED BACKGROUND GROUNDWATER
MONITORING LOCATION.
5. THE WATERS OF THE US HAVE NOT BEEN APPROVED BVTHE US ARMY CORPS OF ENGINEERSAT THE
TIME OF THE MAP CREATION. THIS MAP IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION
PURPOSES. THE WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM AIMED FOSTER
WHEELER ENVIRONMENTAL&INFRASTRUCTURE,INC. NATURAL RESOURCE TECHNICAL REPORT FOR
BELEWS CREEK STEAM STATION DATED JULY 2.2015.
6. THE LOCATIONS OF ALL BOUNDARIES, REMEDIATION AND MONITORING W ELLS. AND WETLANDS WERE
PROVIDED BY SYNTERRA CORPORATION AND ORIGINALLY DOCUMENTED IN THE CORRECTIVE ACTION
PLAN UPDATE DECEMBER 2019 AND THE DEMONSTRATION OF 02L COMPLIANCE FOR THE BELEWS
CREEKASHBA INBYDECEMB R37, 2019 TECHNICAL MEMORANDUM(MARCH 2O20) AND SHOULD BE
CONSIDERED APPROXIMATE.
7. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
8. AERIAL PHOTOGRAPHY OBTAINED FROM ARCGIS WORLD IMAGERY WEB -SERVER
9. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE
SYSTEM FIRS 3200(NAD83I2011).
LEGEND
(D APPROVED BACKGROUND GROUNDWATER MONITORING LOCATION
® PROPOSED EFFECTIVENESS MONITORING WELL
STRUCTURAL FILL BOUNDARY
ASH BASIN WASTE BOUNDARY
• • ASH BASIN GEOGRAPHIC LIMITATION
■ ■ ■ EFFECTIVENESS MONITORING FLOW PATH
LANDFILL GEOGRAPHIC LIMITATION
COAL PILE STORAGE AREA
PINE HALL ROAD LANDFILL (CLOSED)
LINED RETENTION BASIN
® WETLANDS (AMEC NRTR 2015)
• • • DUKE ENERGY CAROLINAS PROPERTY BOUNDARY
GRAPHIC SCALE
f'DUKE 0 400 800 FIGURE 4-6
r ENERGY. (IN FEET) EFFECTIVENESS MONITORING WELL
CAROLINAS NETWORK AND FLOW PATHS
DRAWN BY: T. EISCHEN DATE: 05/05/2020 BELEWS CREEK STEAM STATION
REVISED BY: DATE:
A=CAM CHECKED BY: DATE: PILOT TEST WORK PLAN
APPROV"—PROJECT
MAN DATE: BELEWS CREEK, NORTH CAROLINA
PROJECT MANAGER: DATE:
e
I