CAMA Annual Appendix E

2018 CAMA Annual Interim Monitoring Report April 30, 2019
Duke Energy Carolinas, LLC - Marshall Steam Station SynTerra
APPENDIX E
OPTIMIZED INTERIM MONITORING PLANS FOR
2019

DUKE
ENERGY,
December 17, 2018
North Carolina Department of Environmental Quality (NCDEQ)
Chief, Animal Feeding Operations and
Groundwater Section
1636 Mail Service Center
Raleigh, NC 27699
Attn: Mr. Eric Smith
Re: Marshall IMP Optimization — Proposed Constituent List Revision
Mr. Smith,
526 South Church Street:
Mail Code EC13K
Charlotte, North Carolina 28202
Duke Energy (Duke) originally requested approval to implement a proposed optimized Interim
Monitoring Plan (IMP) for Marshall Steam Station as detailed in a letter and respective attachment dated
October 23, 2018. Approval of the original request has not yet been received.
Duke is submitting the attached revised proposed optimized IMP for Marshall Steam Station that
includes:
removal of nitrate as N from the constituent list to include in the IMP; and
addition of nitrate/nitrite to the constituent list to include in the IMP.
This revision is based on concerns regarding the short hold time for nitrate as N (48 hours) compared to
nitrate/nitrite (28 days). Nitrate as N was originally planned to be included in the IMP for geochemical
modeling purposes only. Both nitrate as N and nitrate/nitrite are voluntary parameters that Duke has
historically analyzed for during IMP events. Duke has discussed the hold time concern with their
consultant and have determined that analyzing for nitrate/nitrite in lieu of nitrate as N will serve similar
and sufficient information needs for the Site's geochemical model.
The original request for concurrence was submitted to the Mooresville Regional Office (MRO) on
October 2, 2018 and respective concurrence was received on October 2, 2018. Relevant MRO contacts
are being notified of this revision concurrently via copy to this letter.
If there are any questions regarding this request, please contact me at [phone].
Respectfully Submitted,
_ /
-6.j2Zt"t�lGflG
Tyler Hardin, EIT
Environmental Services

Cc (via e-mail): Brandy Costner, NCDEQ MRO
Andrew Pitner, NCDEQ MRO
Steve Lanter, NCDEQ CRO
John Toepfer, Duke Energy
Ed Sullivan, Duke Energy
Attachments: Revised - Marshall IMP Optimization

Wells for Quarterly Sampling
AB-10SL/D/BR/BRL
AB-12S/D/BR
AB-14D/DU
AB-15SL
AB-16DU
AB-17S/D
AB-18S/D/DU
AB-1S/D/BR/BRL/BRLL/BRLLL
AB-20S
AB-21S
AB-2BR
AB-3S
AB-5S/D/DU/BR
AB-6S/D/BRA/BRL
AB-7DU
AB-8DU
AL-1S/D/BR/BRL
AL-2S/D/BR/BRL/BRLL/BRLLL
AL-3D/BR
AL-4D/BR/BRL
CCR-9S1/DA1
GWA-2DA
GWA-10S
GWA-15S/D
MW-14BR/BRL
M W-6S/D
M W-7S/D
M W-8S/D
M W-9S/D
Marshall IMP Optimization
Summary of Recommend IMP Wells
(to begin Q1 2019)
Wells for Semi -Annual Sampling
AB-12SL
AB-14S
AB-15D/BR
AB-20D
AB-21D
AB-2S/D
AB-3D
AB-9S/D/BR
AL-3S
BG-1S/D/BRA
BG-2S/BR
BG-3S/D/BR
GWA-1S/D/BR
GWA-3S/D
GWA-4S/D
GWA-5S/D
GWA-6S/D
GWA-7S/D
GWA-8S/D
GWA-9BR
GWA-10D
GWA-11S/D/BR
GWA-12S/D/BR
GWA-13S/DA
GWA-14S/D
MW-1
M W-4/D
M W-7
MW-12S/D
MW-13S/D
MW-14S/D
OB-1 (Dry Ash Landfill)
A site -wide round of water levels in all wells (sampled or not) will occur semi-annually
seasonal groundwater elevation information.
-------------------------------------------------------------------------------------------------------
Wells in red text are proposed for installation in Q4 2018.
1 Indicates CCR network well added to IMP per Brandy Costner request (conference call 9/5/18)
2 Well currently included on IMP list that is proposed to be removed from IMP (CAMA) sampling;
will continue to be sampled under applicable landfill permit requirements.
3 Well cluster anticipated to be replaced Q1-Q2 2019
------------------------------------------------------------------------------------------------------------
NCDEQ provided concurrence on the proposed IMP locations and sampling frequencies on
October 02, 2018 (Costner email to Hardin)
Discontinue Sampling Wells
AB-10S
AB-11S/D
AB-13S/D
AB-16S/D
AB-4S/SL/D
AB-7S/D
AB-8S/D
GWA-2S
MS-82
MS-102
MS-112
MS-132
MW-10S/D
MW-11S/D
MW-22
MW-32
M W-52
OB-1 (Ash Basin)
AB-17S/D3
AB-18S/D

Marshall IMP Optimization
Summary of Recommend IMP Constituents
(to begin Q1 2019)
Include in Ongoing Quarterly/Semi-Annual IMP Monitoring
2017 CSA Update CON
Additional Water Quality Parameters
Proposed (non -COI) constituents to be discontinued
Antimony
Alkalinity (CO3/HCO3)
Aluminum
Arsenic
Calcium
Copper
Barium
Magnesium
Lead
Beryllium
Nitrate + Nitrite
Mercury
Boron
Potassium
Sulfide
Cadmium
Sodium
Total Suspended Solids (TSS)
Chloride
Total Organic Carbon (TOC)
Uranium (total)
Chromium (total)
Zinc
Chromium (hexavalent)
Cobalt
Iron
Manganese
Molybdenum
Nickel
Radium*
Selenium
Strontium
Sulfate
Total Dissolved Solids (TDS)
Thallium
Vanadium
Notes:
(*) Total radium to be analyzed at select locations in accordance with current IMP
------------------------------------------------------------------------------------------------------------
NCDEQ provided concurrence on the proposed parameter list on October 02, 2018
(Coster email to Hardin)

NORTH CAROLINA
ROY coO OVER Eft."ta) Qualttty
cat
MICHAEL S..REGAN
s
LINDA CULPEPPER
rnrttft Ltirerror
December 21, 2018
Paul Draovitch
Senior Vice President
Environmental, Health & Safety
Duke Energy
526 South Church Street
Mail Code EC3XP
Charlotte, North Carolina 28202
Subject: Optimized Interim Monitoring Plans for 14 Duke Energy Facilities
1 st Quarter 2019
Dear Mr. Draovitch:
The North Carolina Department of Environmental Quality (DEQ) is providing the attached
optimized Interim Monitoring Plans (IMPs) for the respective coal ash facilities.
The attached IMPs represent agreements between the DEQ Regional Offices and Duke Energy's
subject matter experts (SMEs) on optimization of the groundwater monitoring programs at each
facility. Each IMP includes a list of wells that shall be sampled quarterly, a list of wells to be
sampled semi-annually, a list of wells where sampling will be discontinued, and a list of wells to
be abandoned. Each IMP also contains a list of Constituents of Interest (COIs) to be analyzed and
a list of COIs that will no longer be analyzed. The final analyte list was determined by reviews
conducted by the DEQ Regional Offices based on additional information and rationale provided
by Duke Energy, including historical sampling results and time -series trend analyses.
Duke Energy shall implement the optimized IMPs beginning the 11 Quarter of year 2019. The
optimized IMPs will not require quarterly updating as did the previous IMPs. Beginning 1st
Quarter 2019 and continuing until the updated individual facility Corrective Action Plans are
approved, Duke Energy shall be responsible for updating the IMPs as wells are installed,
reinstalled, and/or removed from the individual facility groundwater monitoring programs. DEQ
does not expect a formal submittal every time a well is added or removed, however, any changes
North Carolina Department of Environmental Quality I Division of Water Resources I AFOGW Section
512 North Salisbury Street 11636 Mail Service Center I Raleigh, North Carolina 27699-1636
91.9.707.9129

to the IMPs should be agreed upon by Duke Energy and the respective DEQ Regional Office prior
to implementation. At a minimum, an annual review of the optimized IMPs should be conducted
between Duke Energy and the respective DEQ Regional Office in the form of a face-to-face
meeting to determine if the wells, sampling frequencies, and/or parameters need to be adjusted.
Ideally, this review should take place prior to 1st Quarter of the following year. After this annual
review, if any changes have been agreed upon between Duke Energy and the respective DEQ
Regional Office, then a formal updated IMP should be submitted.
As a reminder, per DEQ's May 1, 2017 letter, the annual monitoring reports shall be due April 30
of the following calendar year. The 2018 annual monitoring report shall be due April 30, 2019.
The attached optimized IMPs only contain references to groundwater monitoring locations. DEQ
may elect to require establishment of surface water monitoring program in the future related to the
ongoing IMPs or corrective action effectiveness monitoring.
In order to continue optimizing the groundwater monitoring at each facility, DEQ will be removing
the groundwater monitoring condition from the NPDES permits as they are reissued. Duke Energy
shall continue to monitor the compliance wells separately under the individual NPDES permits
until the NPDES permits are reissued with no groundwater monitoring condition. At that time,
the compliance wells shall continue to be monitored per the attached optimized IMPs under the
authority of 15A NCAC 02L .0110.
If you have any questions, please feel free to contact the appropriate Regional Office or Steve
Lanter (Central Office) at [phone].
on RisaaeVd. Section Chief
Animal Feeding Operations and Groundwater
Attachments: Optimized Interim Monitoring Plans for the 14 coal ash facilities
cc: WQROS Regional Offices
WQROS Central File Copy

� DUKE 4i0S.Wilmington Street.
Raleigh, NC 27601
E N E RGY® Mailing Address
Mail Code NC 15
Raleigh, NC27601
March 20, 2019
North Carolina Department of Environmental Quality
Attn: Mr. Jon Risgaard
Chief, Animal Feeding Operations and Groundwater Section
1636 Mail Service Center
Raleigh, NC 27699 - 1636
Re: Optimized Interim Monitoring Plans (IMP) for 14 Duke Energy Facilities — Modification Request
Annual Reports— Modification Request
Dear Mr. Risgaard,
On December 21, 2018, Duke Energy (Duke) received the North Carolina Department of Environmental
Quality (DEQ) approval via email for the Optimized Interim Monitoring Plans (IMP) for the following 14
facilities:
• Allen Steam Station (Allen);
• Asheville Steam Electric Plant (Asheville);
• Belews Creek Steam Station (Belews Creek);
• Buck Combined Cycle Station (Buck);
• Cape Fear Steam Electric Plant (Cape Fear);
• James E. Rogers Energy Complex (Cliffside);
• Dan River Combined Cycle Station (Dan River);
• HF Lee Energy Complex (HF Lee);
• Marshall Steam Station (Marshall);
• Mayo Steam Electric Plant (Mayo);
• Riverbend Steam Station (Riverbend);
• Roxboro Steam Electric Plant (Roxboro);
• L.V. Sutton Energy Complex (Sutton); and
• W.H. Weatherspoon Power Plant (Weatherspoon).
Duke would like to provide clarification and request respective concurrence on a few items related to the
December 21, 2018 approved IMP.
Item 1:
Duke understands that DEQ expects newly installed monitoring wells to be sampled for the minimum
suite of Coal Ash Management Act (CAMA) parameters (as listed in the former Fourth Quarter 2018
IMP), and on a quarterly basis for a minimum of four events. Duke believes this expectation may not
have been clearly noted in the proposed and subsequently approved December 2018 Optimized IMP.
Duke would like to clarify via this letter that newly installed monitoring wells for investigation of
potential primary and secondary source assessments or DEQ required data gaps under the CAMA
program will be sampled for the former Fourth Quarter 2018 minimum suite of CAMA parameters, as

March 20, 2019
Risgaard Letter
well as some voluntary parameters (for geochemical modeling purposes). Such new wells will be
sampled on a quarterly basis for at least four events.
To address, attached Table 1 lists the parameters to be included for such new wells. The attached
Tables 2.1 through 2.14 include modified versions of the IMP Optimization summaries of wells,
frequency and constituents for each of the 14 Duke facilities, respectively.
Item 2:
Specifically, after receiving DEQ's approval of the Optimized IMP for the respective 14 facilities, Duke
noticed that four sites (Allen, HF Lee, Riverbend and Weatherspoon) had mistakenly listed
Comprehensive Water Level Sweeps for quarterly rather than semi-annually. The attached Tables 2.1,
2.8, 2.11 and 2.14 now list comprehensive water level sweeps on a semi-annual basis, consistent with
the other 10 facilities.
Another change on Tables 2.1 through 2.14 is previously discontinued parameters, total aluminum and
dissolved metals, have been re -added to select sites voluntarily to support geochemical modeling.
Specifically, dissolved metals may be analyzed for at select well locations (yet to be determined) at
some sites during dewatering of the ash basins to help determine if the dewatering process affects the
total to dissolved ratio of some metals. Other voluntary parameters have also been added in support of
geochemical modeling, but unlike total aluminum and dissolved metals, they were not specifically listed
previously as discontinued parameters.
Item 3:
Duke would like to take this opportunity to propose a revised CAMA quarterly data submittal schedule
to better correspond to our 2019 plans for sampling. The current CAMA quarterly data submittal
schedule was approved by DEQ via email on June 6, 2018. A revised schedule has been attached as
Table 3.
Item 4:
Another condition of the June 6, 2018 CAMA quarterly data submittal approval issued by DEQ was for
each of Duke's Subject Matter Expert to provide updates to the Division of Water Resources (DWR)
Regional Office individually on a monthly basis to discuss work done in the previous month and any
upcoming work scheduled or proposed for the following month. Duke requests concurrence to provide
monthly updates to DWR Regional Offices by the end of each month, rather than mid -month, as is the
current practice for some of the sites. This will also allow for monthly updates to be completed with data
submittals.
Upon approval of the items discussed above, this information and respective attachments will replace the
December 21, 2018 versions of the Optimized IMPS for the 14 sites, and will supersede the June 6, 2018
CAMA quarterly data submittal approval.
Item 5:
Also within the DEQ letter dated December 21, 2018 is a requirement for annual monitoring reports due by
April 30. Duke has been in discussions with DEQ staff over the past few weeks and understands DEQ is
open to a modification in schedule. As such, Duke proposes the following schedule for 2019 submittal of
2

March 20, 2019
Risgaard Letter
annual reports along with annual effectiveness monitoring reports for three sites that have implemented
accelerated remediation:
• Annual Monitoring Reports Due April 30, 2019 —Allen, Belews Creek, Cliffside, Marshall, Mayo and
Roxboro facilities (no change proposed);
• Annual Monitoring Reports Due July 31, 2019 — Asheville, Buck, Cape Fear, Dan River, HF Lee,
Riverbend, Sutton and Weatherspoon facilities;
• Annual Effectiveness Monitoring Report Due May 15, 2019 — Sutton (no change proposed);
0 Annual Effectiveness Monitoring Reports Due July 31, 2019 — Asheville and Belews Creek.
The accelerated remediation system at Asheville went into service in March 2018. The system was shut off
as requested by DEQ for pump tests completed at the site. The pump tests were completed from May to
July 2018. Once the system was to be re -activated, Duke learned the system was struck by lightning
sometime during the period of the pump tests. Multiple parts with long -lead times were ordered and the
system finally returned to service in February 2019. As the system has not operated much of 2018, an
extension to the effectiveness report will allow additional data to be collected and included.
For Belews Creek, an extended timeframe for evaluation of the accelerated remediation system will assist in
determining the effects of ash basin decanting/dewatering. Operational lowering of the ash basin is
underway. Decanting, followed by dewatering, is anticipated to begin in late March/early April 2019 and
expected to continue through September 2020. The fate and transport model predicts that decanting will
significantly change groundwater conditions in the area of the remediation system. The model predicts that
groundwater levels will decrease and that the flow direction may change, strengthening a groundwater
divide along Middleton Loop Road. These changes could significantly affect the performance and utility of
the remediation system. Extending the submittal of the Belews Creek Effectiveness Monitoring report to the
end of July 2019 will provide several months of extraction system data collected during ash basin decanting
progress and be very valuable in assessing the extraction system's performance in regards to significant
changing site conditions.
If you have any questions or need any clarification regarding the information provided, feel free to
contact me at [e-mail] or at 919-546-7863 at your convenience.
Respectfully submitted,
AohnToepfer, PPE
Lead Engineer, Duke Energy EHS CCP
Waste & Groundwater Programs

March 20, 2019
Risgaard Letter
cc (via e-mail): Steve Lanter - NCDEQ CRO
Eric Smith - NCDEQ CRO
Brandy Costner— Mooresville Regional Office
Shuying Wang —Winston-Salem Regional Office
Ted Campbell —Asheville Regional Office
Eric Rice — Raleigh Regional Office
Will Hart —Washington Regional Office
Geoff Kegley — Wilmington Regional Office
Kent White — Fayetteville Regional Office
Ed Sullivan - Duke Energy
Bryan Moeller— Duke Energy
Kathy Webb—SynTerra Corp.
Attachments: Table 1— Summary of Analytical Parameters for Newly Installed Wells
Table 2.1- Summary of Wells, Frequency, & Parameters —Allen
Table 2.2 - Summary of Wells, Frequency, & Parameters —Asheville
Table 2.3 - Summary of Wells, Frequency, & Parameters — Belews Creek
Table 2.4 - Summary of Wells, Frequency, & Parameters — Buck
Table 2.5 - Summary of Wells, Frequency, & Parameters — Cape Fear
Table 2.6 - Summary of Wells, Frequency, & Parameters — Cliffside
Table 2.7 - Summary of Wells, Frequency, & Parameters — Dan River
Table 2.8 - Summary of Wells, Frequency, & Parameters — HF Lee
Table 2.9 - Summary of Wells, Frequency, & Parameters — Marshall
Table 2.10 - Summary of Wells, Frequency, & Parameters — Mayo
Table 2.11- Summary of Wells, Frequency, & Parameters — Riverbend
Table 2.12 - Summary of Wells, Frequency, & Parameters — Roxboro
Table 2.13 - Summary of Wells, Frequency, & Parameters — Sutton
Table 2.14 - Summary of Wells, Frequency, & Parameters — Weatherspoon
Table 3 - Proposed Sampling Schedules & Respective CAMA Data Submittals
4

TABLE 1
IMP Optimization
Summary of Analytical Parameters for Newly Installed Wells
(to begin Q1 2019)
For each of Duke Energy's 14 North Carolina facilities, new wells installed as part of the CAMA program will be
monitored quarterly. Samples from these wells will be analyzed for parameters formerly included as part of the 4th
Quarter 2018 IMP and additional constituents analyzed voluntarily. After four quarterly events, the monitoring
frequency and/or parameter list for the new wells will be re-evaluated with NCDEQ and may be reduced and/or
optimized. A summary of analytical parameters to include under this criteria is provided below.
SUMMARY OF ANALYTICAL PARAMETERS FOR NEWLY INSTALLED WELLS
Minimum CAMA Parameters per Q4 2018 IMP
(Metals are Totals)
Additional Voluntary Parameters
[Dissolved (0.45 micron filter)]
Aluminum
Mercury
Molybdenum
Aluminum
Antimony
Mercury
Molybdenum
Nickel
Alkalinity (CO3/HCO3)
Antimony
Nickel
Arsenic
Arsenic
Potassium
Barium
Phosphorus
Barium
Radium (226 + 228)
Beryllium
Potassium
Beryllium
Selenium
Boron
Selenium
Boron
Sodium
Cadmium
Silver
Cadmium
Strontium
Calcium
Sodium
Calcium
Sulfate
Chromium
Strontium
Chloride
Sulfide
Cobalt
Thallium
Chromium
Total Dissolved Solids (TDS)
Copper
Vanadium
Cobalt
Thallium
Iron
Zinc
Copper
Total Organic Carbon (TOC)
Lead
Hexavalent Chromium
Uranium (233+234+236+238)
Lithium
Iron
Lead
Total Suspended Solids (TSS)
Magnesium
IManganese
Vanadium
Magnesium
Zinc
Additional Voluntary Parameters
(Totals)
Manganese
Fluoride
Lithium
Nitrate + Nitrite
Phosphorus
Methane*
Additional Field Water Quality Parameters
A� = A
Dissolved Oxygen (DO)
Oxidation -Reduction Potential (ORP)
Redox Potential (Eh)
Turbidity
Temperature
Specific Conductance
pH
* W.H. Weatherspoon Power Plant only

Table 2.1- Allen
Wells for Quarterly
Monitoring (33)
AB-21SS*
AB-25SS*
AB-29SS*
AB-32D
AB-33D
AB-33SS*
AB-34S
AB-35PWS*
AB-38SS*
AB-10BR*/ BRL*
GWA-3BRL*
GWA-4BRL*
GWA-5BRL*
GWA-6BRL*
CP-1S*/D*
CP-2S*/D*
CP-3S*/D*
CP-4S*/D*
CP-5S*/D*
CP-6S*/D*/BR*
BG-1BR*
CCR-26S* / D* / BR*
CCR-16BR*
Allen Steam Station - IMP Optimization
Summary of Wells, Frequency, & Parameters
(to begin Q1 2019)
Comprehensive Water Level Sweep to occur Semi -Annually
- March 2019
Wells for Semi -Annual Monitoringt (103)
-A i
AB-04S / D / BR
GWA-05S / D / BRA
AB-06R
GWA-06S / DA / BRA
AB-09S / D
GWA-07S / D
AB-10S / D
GWA-08S
AB-13S / D
GWA-09S / D / BR
AB-14D / BR
GWA-14S / DA
AB-20S / D
GWA-15S / D
AB-21S / SL / D** / BRL
GWA-19S / D**
AB-22S / D / BR / BRL
GWA-22S / D
AB-24S / SL / D** / BR
GWA-23S / D**
AB-25S / SL / BRU** / BR**
GWA-24SA / D / BR
AB-26S / D
AB-12S / D
AB-30S
BG-01S / DA
AB-32S
BG-2S / D / 2BRA2
AB-33S
BG-3S / D
AB-34D
BG-4S / D / BR
AB-35S / D** / BR
GWA-16S / D
AB-36S / D
GWA-21S / DA / BR
AB-37S / D
GWA-26S / D
AB-38S / D / BR
Comprehensive Water
Level Sweeps
(includes wells in Semi-
Annual, Quarterly, and
Discontinued Monitoring
Lists)
AB-39S / D
GWA-01S / D / BR
GWA-02S / D
GWA-03S / D / BRA
GWA-04S / D / BR
Optimized Quarterly & Semi -Annual Parameters for "Non -New Wells"
Additional Water Quality
2018 CSA Update COIs
(Total & Dissolved Where Applicable)
Parameters (Total & Dissolved
Where Applicable)
Antimony
---------------------------------
Lithium
---------------------------------
Aluminum
-----------------------------------------
Arsenic
---------------------------------
Manganese
---------------------------------
Alkalinity (CO3/HCO3)
-----------------------------------------
Beryllium
Molybdenum
Calcium
---------------------------------
Boron
---------------------------------
Nickel
-----------------------------------------
Chloride
---------------------------------
Cadmium
---------------------------------
---------------------------------
Selenium
---------------------------------
-----------------------------------------
Dissolved Oxygen (DO)
-----------------------------------------
Chromium (total)
Strontium
Redox Potential (Eh)
---------------------------------
Chromium (hexavalent)
---------------------------------
-----
------------------------------------------------------------
Sulfate
------------- --------------------
---------
Magnesium
-----------------------------------------
Cobalt
Thallium
Nitrate + Nitrite
---------------------------------
Iron
---------------------------------
Total Dissolved Solids (TDS)
-----------------------------------------
Oxidation -Reduction Potential (ORP)
Vanadium pH
---------------------------------
_________ Potassium
Specific Conductance
---------------------------------
Sodium
Total Organic Carbon (TOC)
-------------------------------
Temperature
-------------------------------
Turbiditv
MP = Interim Monitoring Plan
CSA = Comprehensive Site Assessment
COls = Constituents of Interest
CAMA = Coal Ash Management Act
CDEQ = North Carolina Department of Envrionmental Quality
Discontinue Sampling
Wells/Water Level Only (23)
A B-01 R
AB-02/D
AB-05
AB-06A
AB-11D
AB-23S / BRU**
AB-27S /D / BR
AB-28S / D
AB-29S / SL / D
AB-30D
AB-31S
GWA-08D
GWA-17S / D
GWA-18S / D
To Be Replaced
No well replacements planned
at this time
To be Abandoned
GWA-6D
i-Annual monitoring events are scheduled to be performed concurrently with two Quarterly monitoring events per year and will include the wells listed under Quarterly for
ctive events.
New wells installed as part of the CAMA program will be monitored quarterly. Samples from these wells will be analyzed for parameters formerly included as part of the 4th
Zuarter 2018 IMP and additional constituents analyzed voluntarily (see Table 1). After four quarterly events, the monitoring frequency and/or parameter list for the new wells will
ie re-evaluated with NCDEQ and may be reduced and/or optimized. Replacement wells will not be considered "new wells" and will follow the respective monitoring protocol for
he well in which they replace; however, additional parameters may be included voluntarily.
** Denotes well was previously approved by DEQ to be sampled for boron and sulfate only in historic versions of the IMP due to elevated pH. Respective well is proposed to
remain a boron -and -sulfate -only sample location; however, if the pH improves with redevelopment to fall <_ 8.5 at such well, the well will be sampled for the complete appropriate
parameter suite for that well; i.e. "optimized non -new well" or "new well" lists as proposed herein.

Table 2.2 - ASHEVILLE
Asheville Steam Electric Plant - IMP Optimization
Summary of Wells, Frequency, & Parameters
(to begin Q1 2019)
Comprehensive water sweep to occur semi-annually.
Modification - March 2019
Wells for Quarterly Monitoring (51)
AS-513R (pH)
MW-15BRL+
C13-6
MW-16A+
C13-7
M W-16D+
CB-8+
MW-16BR+
CB-8BR+
MW-16BRL+
CCR-100SL+
MW-16BRLL+
CCR-100BR+
MW-17A+
CCR-100BRL+
MW-17BRL+
CCR-101BR+
MW-18D
CCR-102S+
MW-18BR+
CCR-102D+
MW-18BRL+
CCR-103D
MW-20A
CCR-103BR
MW-20BR+
EXT-01+
MW-20BRL+
EXT-02
MW-26S
EXT-A
M W-26BR+
GW-2+
PZ-17BRL+
MW-5D
CPA-1D*
MW-51311
CPA-1BR*
MW-8S+
CPA-2D*
MW-9S+
CPA-2BR*
M W-9 D+
CPA-4D*
MW-9BR+
CPA-4BR*
MW-15A+
CPA-3D*
MW-15D+
CPA-3BR*
Wells for Semi -Annual Monitoringt (35)
AMW-03B+
MW-13D
CB-1+
MW-13BR
CB-1D+
M W-24S+
CB-3 R+
M W-25S
C13-4+
MW-25BR
C13-413+
MW-25BRL
CB-5
P-103
CB-9
PZ-17S+
CB-9SL
PZ-17D+
CB-91311
PZ-19
CCR-104D+
CCR-105BR
CCR-105D+
GW-1+
GW-1D
GW-1BR
GW-3+
G W-4+
MW-3D+
MW-6S+
MW-6D+
Comprehensive Water Level Sweeps
(includes wells in Semi -Annual,
Quarterly, and Discontinued
Monitoring Lists)
MW-6BR+
MW-10+
MW-11
MW-11D
Optimized Quarterly & Semi -Annual Parameters for "Non -New" Wells
(Total & Dissolved Where Applicable)
Antimony
--------------------------------------
Manganese
--------------------------------------------
Alkalinity (CO3/HCO3)
-----------------------------------------
Arsenic
Selenium
Calcium
Beryllium
--------------------------------------
Strontium
--------------------------------------------•-----------------------------------------
Dissolved Oxygen (DO)
Boron
Sulfate
Redox Potential (Eh)
Cadmium
Total Radium (226 + 228)+
Magnesium
Chloride
Total Dissolved Solids (TDS)
Potassium
Chromium (total)
Total Uranium (233+234+236+238)+
Sodium
Chromium (hexavalent)
Vanadium
Nitrate + Nitrite
Cobalt
Lithium
Iron
Molybdenum
Nickel
-----------------------------------------
Oxidation-Reduction Potential (ORP)
•-----------------------------------------
pH
•-----------------------------------------
Specific Conductance
•-----------------------------------------
Thallium
•-----------------------------------------
Total Organic Carbon (TOC)
•-----------------------------------------
Temperature
•-------------------------------------
Turbidity--
Discontinue Sampling
Wells/Water Level Only (21)
MW-14BR
MW-23DU
MW-23DL
MW-23BR
AMW-1B
ABMW-11BR
AMW-2A
AMW-2B
APZ-30
B-1
B-1-A
B-2
CB-1BR
CB-I-BRL
CB-2
CB-8D
GW-5
MW-7BR
MW-15BR
MW-19BR
P-102
EXT-D
MW-8BR
MW-26BRL+
AS-5BRL
To Be Replaced
No well replacements planned at
this time
Abandoned(3)
MW-21D
MW-22D
MW-22BR
Notes:
IMP = Interim Monitoring Plan
CSA = Comprehensive Site Assessment
COls = Constituents of Interest
CAMA = Coal Ash Management Act
NCDEQ = North Carolina Department of Envrionmental Quality
tSemi-Annual monitoring events are scheduled to be performed concurrently with two Quarterly monitoring events per year and will include the wells listed under Quarterly for respective events.
+ Indicates the well to be sampled and analyzed for total radium (226 +228) and total uranium (233+234+236+238).
*New wells installed as part of the CAMA program will be monitored quarterly. Samples from these wells will be analyzed for parameters formerly included as part of the 4th Quarter 2018 IMP and
additional constituents analyzed voluntarily (see Table 1). After four quarterly events, the monitoring frequency and/or parameter list for the new wells will be re-evaluated with NCDEQ and may be
reduced and/or optimized. Replacement wells will not be considered "new wells" and will follow the respective monitoring protocol for the well in which they replace; however, additional parameters
may be included voluntarily.

Wells for Quarterly Monitoring (31)
AB-04 Lower Ash/SAP
CCR-2S/D
CCR-13S*/D*/BR*
EXO B-01
EXOB-02
GWA-01S
GWA-10S(+)
GWA-11S/D
GWA-18SA
GWA-19SA/D
GWA-20SA/D(+)
GWA-21S/D
GWA-27S/D(+)
LRB-01S/D/BR
LRB-02S/D/BR
MW-104BRA(+)
MW-200BR
M W-04
Table 2.3 - Belews Creek
Belews Creek Steam Station - IMP Optimization
Summary of Wells, Frequency, & Parameters
(to begin Q1 2019)
Comprehensive water level sweep to occur semi-annually
tion - March 2019
Wells for Semi -Annual Monitoringt (56)
AB-1BR
GWA-26S/D/BR
AB-2S/D
GWA-27BR
AB-31)
GWA-30S/D
AB-4S/D/BR/BRD**
GWA-31S/D
AB-6SL
GWA-32S/D
AB-7S
GWA-3S (att)
BG-01S(att)/D
GWA-6S
BG-02S/D/BRA
GWA-7SA
BG-03S/D
GWA-8S/D
GWA-10DA
GWA-9BR
GWA-16S/DA/BR* *
M W-03
GWA-17S
MW-20OS/D
GWA-18D
MW-202S(+)/D(+)/BR(+)
GWA-19BR
MW-204D
GWA-01D/BR**
Comprehensive Water Level
Sweeps (includes wells in
Semi -Annual, Quarterly, and
Discontinued Monitoring Lists)
GWA-20BR
GWA-22S/D
GWA-24S/D/BR (att)
GWA-25BR
Optimized Quarterly & Semi -Annual Parameters for "Non -New Wells"
2017 CSA Update COls
Additional Water Quality Parameters (Total & Dissolved Where
Total & Dissolved Where Applicable)
Applicable)
Antimony
---------------------------------
Iron
-----------------------------------------
Aluminum
----------------------------------------------------------------------------------
Arsenic
Manganese
Alkalinity (CO3/HCO3)
---------------------------------
------------Barium------------
-----------------------------------------
- -----------Molybdenum------------
----------------------------------------------------------------------------------
------------------------------------Calcium------------------------------------
Beryllium
Selenium
Dissolved Oxygen (DO)
Boron
Strontium
Lithium
---------------------------------
Cadmium
-----------------------------------------
Sulfate
----------------------------------------------------------------------------------
Redox Potential (Eh)
---------------------------------
-----------------------------------------
Total Dissolved Solids (TDS)
----------------------------- ------------------------
Magnesium
------------
Chromium (total)
Thallium
Nitrate + Nitrite
Chromium (hexavalent)
Vanadium
Oxidation -Reduction Potential (ORP)
Cobalt
-
pH
----------------------------------------------------------------------------------
Potassium
----------------------------------------------------------------------------------
Radium (total) (+)
----------------------------------------------------------------------------------
Specific Conductance
----------------------------------------------------------------------------------
Sodium
----------------------------------------------------------------------------------
Total Organic Carbon (TOC)
----------------------------------------------------------------------------------
Temperature
----------------------------------------------------------------------------------
Turbidity
------------------------------ -----------------------------
Uranium (total) (+)
Discontinue Sampling
Wells/Water Level Only (39)
AB-1S/D
AB-3S
AB-4SL (pH)
AB-5S/SL/D
AB-6S/D
AB-7D
AB-8S/SL/D
AB-9S/D/BR/BRD**
GWA-12S/D/BR (SF)
GWA-17D
GWA-23S/D (SF)
GWA-2S/D
GWA-3D
GWA-6D
GWA-7D
GWA-9S/D
MW-104S/D/BR**
MW-201D/BR
M W-203S/D/BR
M W-204S
To Be Replaced
No well replacements planned at
this time
To be Abandoned
No wells are scheduled to be
abandoned at this time.
Notes: owilill
IMP = Interim Monitoring Plan
CSA = Comprehensive Site Assessment
COls = Constituents of Interest
CAMA = Coal Ash Management Act
NCDEQ = North Carolina Department of Envrionmental Quality
tSemi-Annual monitoring events are scheduled to be performed concurrently with two of the Quarterly monitoring events and will include the wells listed under Quarterly for respective events.
*New wells installed as part of the CAMA program will be monitored quarterly. Samples from these wells will be analyzed for parameters formerly included as part of the 4th Quarter 2018 IMP
and additional constituents analyzed voluntarily (see Table 1). After four quarterly events, the monitoring frequency and/or parameter list for the new wells will be re-evaluated with NCDEQ and
may be reduced and/or optimized. Replacement wells will not be considered "new wells" and will follow the respective monitoring protocol for the well in which they replace; however,
additional parameters may be included voluntarily.
** Denotes well was previously approved by DEQ to be sampled for boron and sulfate only in historic versions of the IMP due to elevated pH. Respective well is proposed to remain a boron -and -
sulfate -only sample location; however, if the pH improves with redevelopment to fall 158.5 at such well, the well will be sampled for the complete appropriate parameter suite for that well; i.e.
`optimized non -new well' or "new well' lists as proposed herein.
(+) -Select wells to be sampled for total radium (226 and 228) and total uranium (233, 234, 236, and 238). Wells GWA-10S, GWA-20D, GWA-27D and MW-104BR had at least one or more
concentration(s) of total radium (only) reported greater than the Federal MCL, including the latest sample event. MW-104BR was replaced with monitoring well MW-104BRA, due to high pH.
Wells GWA-10S, GWA-20D, GWA-27D and MW-104BRA are to be monitored for total radium and total uranium; if results are less than the Federal MCL, revaluation may indicate of historical
exceedances are anomalous and a revision to the routine monitoring plan will be considered. Background well cluster MW-202S/D/BR will also be included in semiannual sampling of total
radium and total uranium for ongoing comparative purposes.
(SF) - GWA-12S/D/BR and GWA-23S/D will be included as part of the Structural Fill assessment monitoring
(att) - well is typically dry but will not be replaced; attempt to sample (BG-1S, GWA-3S, GWA-24S)

Table 2.4 - Buck
LWellsforQuarterly
itoring (32)
AB-01Dx
AB-02Sx / SLx / Dx / BRx
AB-3Sx / Dx
AB-04S / BRL
AB-05S
AB-09BRA
AB-10Sx / Dx / BRx / BRO
AS-01Sx / Dx
AS-02Dx
AS-03Sx / Dx
BG-01 DA
GWA-015
GWA-09S / D / BRA
GWA-10S / D
GWA-14D
GWA-15BR
MW-01D
M W-08B RA
MW-11BRL
Buck Steam Station - IMP Optimization
Summary of Wells, Frequency, & Parameters
(to begin Q1 2019)
Comprehensive Water Level Sweep to occur Semi -Annually
tion - March 2019
Wells for Semi -Annual Monitoringt (74)
AB-04SL
MW-06BR
AB-05SL
MW-07S / D
AB-06BRU
MW-08S / D
AB-07S / BRU
MW-09S / D
AB-8S / BRU
MW-11S / D / BR
AB-09S / BRUA
MW-12S / D
BG-01S / BRA
MW-13D
BG-02S / D
GWA-14S / D
BG-03S / BRU
GWA-15S / D
GWA-01D
GWA-16S / D / BR
GWA-02S / BRA / BRU
MW-08S / D
GWA-11S / D
GWA-7S / D
GWA-12S / BRU
GWA-8D
GWA-13SR / D
GWA-9S / D
GWA-14S
GWA-18S
GWA-15S / D
GWA-20S
GWA-16S / D/ BR
Comprehensive Water
Level Sweeps
(includes wells in Semi -
Annual, Quarterly, and
Discontinued Monitoring
Lists)
GWA-17S
GWA-18S / DA
GWA-19S / D
GWA-20S / D
GWD
MW-03S
3S / D
M W-04S / D
MW-5S / D
Optimized Quarterly & Semi -Annual Parameters for "Non
-New Wells"
(Total & Dissolved Where Applicable)
Antimony
Arsenic
Barium
Iron
Manganese
Nickle
Aluminum
Alkalinity (CO3/HCO3)
Calcium
Boron
Selenium
Chloride
Chromium (total)
Sulfate
Dissolved Oxygen (DO)
Chromium (hexavalent)
Thallium
Lithium
Cobalt
Total Dissolved Solids (TDS)
Magnesium
Vanadium
Nitrate + Nitrite
Oxidation -Reduction Potential (ORP)
pH
Phosphorus
Potassium
Redox Potential (Eh)
Sodium
Specific Conductance
Strontium
Temperature
Turbidity
IMP = Interim Monitoring Plan
CSA = Comprehensive Site Assessment
COls = Constituents of Interest
CAMA = Coal Ash Management Act
NCDEQ= North Carolina Department of Envrionmental Quality
Discontinue Sampling
Wells/Water Level Only (7)
AB-04BRU
AB-05BRU
GWA-06S
GWA-14BR
MW-01S
MW-06D
M W-06S
To Be Replaced
AB-04BRL, BG-01DA, GWA-
09BRA,GWA-09D, GWA-09S,
GWA-14D
To be Abandoned
None planned at this time,
except for wells to be replaced
mi-Annual monitoring events are scheduled to be performed concurrently with two Quarterly monitoring events per year and will include the wells listed under Quarterly for respective
nts.
*New wells installed as part of the CAMA program will be monitored quarterly. Samples from these wells will be analyzed for parameters formerly included as part of the 4th Quarter 2018
IMP and additional constituents analyzed voluntarily (see Table 1). After four quarterly events, the monitoring frequency and/or parameter list for the new wells will be re-evaluated with
NCDEQ and may be reduced and/or optimized. Replacement wells will not be considered "new wells" and will follow the respective monitoring protocol for the well in which they replace;
however, additional parameters may be included voluntarily.
Well located in basin; will be sampled quarterly until closed for excavation.

Wells for Quarterly
Monitoring (3)
M W-25BR*
MW-25BRL*
MW-25BRLL*
Table 2.5 - Cape Fear
Cape Fear Steam Electric Plant - IMP Optimization
Summary of Wells, Frequency, & Parameters
(to begin Q1 2019)
Comprehensive Water Level Sweep to occur Semi -Annually
Modification - March 2019
Wells for Semi -Annual Monitoringt (61)
ABMW-01 / S / BR
MW-17SU / SL / BR
ABMW-02SU / SL
MW-21SU / SL / BR
ABMW-03 / SR / BR
MW-22S / BR
ABMW-04 / S
MW-23S / D / BR
ABMW-05S / BR
MW-24S / BR
BG M W-04
PZ-01
BGTM W-04
PZ-02
CMW-01
PZ-03S / D
CMW-02
PZ-04
CMW-03
PZ-05
CMW-05R
PZ-06
CMW-06
PZ-08
CMW-07
Comprehensive Water
Level Sweeps
(includes wells in Semi -
Annual, Quarterly, and
Discontinued Monitoring
Lists)
CMW-08
CTM W-01
CTM W-02
CTMW-07
CTMW-08
MW-06BR
MW-09 / BR
MW-10 / D / BR / BRL
MW-11
MW-12 / BR
MW-15SU / SL / BR
MW-16S / BR
Optimized Quarterly & Semi -Annual Parameters for "Non -New Wells"
(Total and Dissolved as Applicable)
Aluminum
Manganese
Alkalinity (CO3/HCO3)
-----------------------------------------
Calcium
-----------------------------------------
Antimony
----------- ----------------------
---------------------------------
Molybdenum
---------------------------------
Arsenic
Nickel
Chloride
---------------------------------
Barium
---------------------------------
---------------------------------
Selenium
---------------------------------
-----------------------------------------
Dissolved Oxygen (DO)
-----------------------------------------
Beryllium
---------------------------------
Strontium
---------------------------------
Redox Potential (Eh)
-----------------------------------------
Boron
---------------------------------
Sulfate
---------------------------------
Magnesium
-----------------------------------------
Chromium(total)
Thallium
Nitrate + Nitrite
---------------------------------
Chromium (hexavalent)
---------------------------------
---------------------------------
Total Dissolved Solids (TDS)
---------------------------------
-----------------------------------------
Oxidation -Reduction Potential (ORP)
-----------------------------------------
Cobalt
---------------------------------
Vanadium
---------------------------------
pH
-----------------------------------------
Iron
---------------------------------
Zinc
---------------------------------
Potassium
-----------------------------------------
Lithium
Specific Conductance
-----------------------------------------
Sodium
-----------------------------------------
Total Organic Carbon (TOC)
-----------------------------------------
Temperature
----------------- -----------------------
Turbidity
Discontinue Sampling
Wells/Water Level Only (9)
ABM W-5
MW-13
MW-18S
MW-19S
MW-20S / BR
MW-5BRR
PZ-07
PZ-09
PZ-10
To Be Replaced
No well replacements planned
at this time
To be Abandoned
No well replacements planned
at this time
Notes:
IMP = Interim Monitoring Plan
CSA = Comprehensive Site Assessment
Cols = Constituents of Interest
CAMA = Coal Ash Management Act
NCDEQ = North Carolina Department of Envrionmental Quality
tSemi-Annual monitoring events are scheduled to be performed concurrently with two Quarterly monitoring events per year and will include the wells listed under Quarterly for
respective events.
*New wells installed as part of the CAMA program will be monitored quarterly. Samples from these wells will be analyzed for parameters formerly included as part of the 4th
Quarter 2018 IMP and additional constituents analyzed voluntarily (see Table 1). After four quarterly events, the monitoring frequency and/or parameter list for the new wells will
be re-evaluated with NCDEQ and may be reduced and/or optimized. Replacement wells will not be considered "new wells" and will follow the respective monitoring protocol for
the well in which they replace; however, additional parameters may be included voluntarily.

Table 2.6 - Cliffside
Cliffside Steam Station - IMP Optimization
Summary of Wells, Frequency, & Parameters
(to begin Q1 2019)
Comprehensive Water Level Sweep to occur Semi -Annually
Modification - March 2019
Wells for Quarterly Monitoring (106)
AB -IS / D / BROR
AB-2S/ D / BRO
GWA-64BRL*
GWA-65BR* / BRL*
AB-3S1 / SL1 / MA15* / I / BRUA / BR / BRA
GWA-66BRL*
AB-4S1 / SL1 / UA15* / LA15* / D / BR
GWA-67BR* / BRL*
AS-4S
AS-7S1 / 1* / BRL
AS-8S / D
GWA-68BRL*
IB-6S* / D*
IB-7S* / D*
BG-1BRA
MW-11S1 / DA / BRO / BRL*
CCR-8BR*
MW-20D / DR
CCR-12BR*
MW-30DA1
CCR-17BR*
U5-1S
CCR-IB-3BR*
U5-2S-SLA1
CCR-U5-4BR*
U5-6S
CLMW-2
AB-7S2 / D2 / BR
CLMW-3S1 / D1
AB-8S2 / D2 / BR
GWA-11BR* / BRL*
AB-9S2 / D2 / BR
GWA-20S1 / D1 / BR
AS-8BR2
GWA-21S1 / BRU1 / BR' / BRL*
AS-9S2 / D2
GWA-22S1 / BRU
GWA-57S2 / D2 / BR
GWA-34BR*
GWA-58S2 / D2 / BR
GWA-38S
GWA-59S2 / D2 / BR
GWA-39S*
GWA-60S2/ D2 / BR
GWA-40S*
GWA-61S2 / D2 / BR
GWA-47D
GWA-62S2 / D2 / BR
GWA-54S / D / BRO
GWA-63S2 / D2
Wells for Semi -Annual Monitoringt (147)
AB-5S1/ BRU / BR
GWA-31D / BRA
AB-6S1 / D / BR
GWA-33S / D / BR
AS-1SB / D
GWA-34S
AS-2S1 / D1 / BR
GWA-35S / D
AS-3BRU
AS-41D
AS-5S / BRU / BR
GWA-36S1 / D1
GWA-37S / D
GWA-38D
AS-6S / D / BRA
GWA-42S*
AS-713 / BRA
GWA-43S / D
BG-1S1 / D1
GWA-44S / D / BR
CCPMW-IS' / D1
GWA-45D
CCR-7S / D
GWA-46D
CCR-81)
GWA-48BR
CCR-12S / D
GWA-51D
CCR-13D
GWA-56S / D
CCR-15D
MW-213A
CCR-IB-1S / D
MW-8S1 / D
CCR-IB-3S / D
MW-10S / D
CCR-U5-3S / D
M W-21D / BR
CCR-U5-4S / D
MW-22BR / DR
CLMW-11
MW-23S / D / DR
CLMW-5S
MW-24D1 / DR1
CLMW-6
MW-25DR
CLP-1***
MW-30S1 / D1
CLP-2***
MW-32S1 / D1 / BR
GWA-1BRU
MW-34S / BRU
GWA-2S1 / BRU'/ BR1
MW-36S / BRU
GWA-31)1
MW-38S1 / D1 / BR1
GWA-4S1 / D1
MW-40S / BRU
GWA-5S / BRU
MW-42S / DA
GWA-10S / D
U5-113
GWA-11S1 / BRU1
U5-21)1 / BR
GWA-12S / BRU
GWA-13BR
U5-4S / D / BRA
U5-5D1 / BR
GWA-14S / D / BR
U5-61)
GWA-23D
U5-8S / D / BR
GWA-24S / D / BR
Comprehensive Water
Level Sweeps
(includes wells in Semi -
Annual, Quarterly, and
Discontinued Monitoring
Lists)
GWA-25S
GWA-26S
GWA-27DA1 / BR1
GWA-28S /BRU / BR
GWA-29D1 / BRA
GWA-30S / BR
Optimized Quarterly & Semi -Annual Parameters for "Non -New Wells"
2018 CSA Update COls
Additional Water Quality Parameters
(Total & Dissolved Where Applicable)
(Total & Dissolved Where Applicable)
Arsenic
Aluminum
---------------------------------------------------------------------------------------------------------
Boron
-------------------------------------------------------------------------------------
Alkalinity--------(CO3/HCO3)
------------------------------------------------- --------------------------------------------------------
Chromium (total)
-----------------------------------------------------------------------------
Barium
---------------------------------------------------------------------------------------------------------
Hexavalent----------------Chromium---------
-------------------------------------------------------------------------------------
Beryllium
--------------------------------------------------------------------------------
Cobalt
------------------------------------------------------------------------------------
-
Calcium
---------------------------------------------------------------------------------------------------------
Iron
-------------------------------------------------------------------------------------
Chloride
---------------------------------------------------------------------------------------------------------
Manganese
-------------------------------------------------------------------------------------
Oxygen (DO)
---------------------------------------------------------------------------------------------------------
Radium (226+228)1
-------------------------------Dissolved
------------------------------------------------------
Fluoride
---------------------------------------------------------------------------------------------------------
Strontium
-------------------------------------------------------------------------------------
Lithium
--------------------------------- ---------------------------------------------------------------------------------------------------------------
Sulfate
---------------------------------------------------------------------------------------------------------
-----------------------------------------------
Magnesium
-------------------------------------------------------------------------------------
Thallium
Nitrate + Nitrite
---------------------------------------------------------------------------------------------------------
Total Dissolved Solids (TDS)
---------------------------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------
Oxidation -Reduction Potential (ORP)
-------------------------------------------------------------------------------------
Uranium (233+234+236+238)
---------------------------------------------------------------------------------------------------------
pH
-------------------------------------------------------------------------------------
Vanadium
Potassium
-------------------------------------------------------------------------------------
Redox Potential (Eh)
-------------------------------------------------------------------------------------
Selenium
------------------------------------------------------------------------------------
Specific Conductance
------------------------------------------------------------------------------------
Sodium
------------------------------------------------------------------------------------
Phosphorus
------------------------------------------------------------------------------------
Total Organic Carbon (TOC)
---------------------------------Temperature ---------------------------------
-------------------------------------Tu
rbid ity------------------------------------
Discontinue Sampling Wells/Water
Level Only (22)
BG-2D
CCPMW-2S / D
CCPMW-3S / D
CCPMW-4
CCPMW-5
CCPMW-6S / D
CCPTW-IS / D
CCPTW-2
CCR-6S / D
GWA-6S / D
GWA-25D
GWA-26D
GWA-30BRU
GWA-32D / BR
GWA-45S
To Be Replaced
AS-7BRA
GWA-2BR
U5-2S-SLA
(Notes:
IMP = Interim Monitoring Plan
CSA = Comprehensive Site Assessment
COls = Constituents of Interest
CAMA = Coal Ash Management Act
NCDEQ = North Carolina Department of Envrionmental Quality
tSemi-Annual monitoring events are scheduled to be performed concurrently with two Quarterly monitoring events per year and will include the wells listed under Quarterly for respective events.
*New wells installed as part of the CAMA program will be monitored quarterly. Samples from these wells will be analyzed for parameters formerly included as part of the 4th Quarter 2018 IMP and additional
constituents analyzed voluntarily (see Table 1). After four quarterly events, the monitoring frequency and/or parameter list for the new wells will be re-evaluated with NCDEQ and may be reduced and/or
optimized. Replacement wells will not be considered "new wells" and will follow the respective monitoring protocol for the well in which they replace; however, additional parameters may be included
voluntarily.
**Wells were previously approved by DEQto be sampled for boron and sulfate only in historic versions of the IMP due to elevated pH. Wells that exhibit elevated pH are proposed to remain a boron -and -sulfate -
only sample location; however, if the pH improves with redevelopment to fall 158.5 at such well, the well will be sampled for the complete appropriate parameter suite for that well; i.e. "optimized non -new well'
or "new well' lists as proposed herein. No wells are currently flagged with this note but may be in the future.
***Wells were previously approved by DEQ to be sampled for boron only in historic versions of the IMP due to these locations being installed as piezometers intended for water level only.
1Select wells to be sampled for Radium (226+228)
2Quarterly sampling includes additional assessment monitoring wells scheduled to be installed in 2019. The proposed monitoring well locations are based on additional data needs and as requested by NCDEQ.
Actual well installation locations will be determined based on field conditions.

Table 2.7 - Dan River
Wells for Quarterly
Monitoring (7)
BG-1DA
GWA-4S/D
GWA-5BR/BRD
GWA-6BR
GWA-9BR
Dan River Steam Station - IMP Optimization
Summary of Wells, Frequency, & Parameters
(to begin Q12019)
Comprehensive water level sweep to occur semi-annually
- March 2019
Wells for Semi -Annual Monitoringt (44)
BG-5S/D MW-22S/D/BR
----------------------------------------- ---------------------------
BG-10S/D/BR
-----------------------------------------T---------------------------
MW-23D/BR
MW_317BR/BRL----
--------------GWA-6S/D ---
-----------------
GWA-7S/D MW-20S/D
-----------------------------------------�---------------------------
GWA-8S/D/BR
CCR-03S/D
--------------------------,---------------------------
GWA9S/D LF-CCR04S/D -------------- --------------1-
---- _------
GWA-10D
LF-CCR-05S/D
------------------------------t---------------------------
GWA12S/
�-------------4
--------------
-------------GWA_14S/D--------------
Comprehensive Water
---------------GWA_ 15 D--------------4
Level Sweeps
GWA-16S/D I
------------------------------------------
(includes wells in Semi-
GWA-17D
------------------------------------------0
Annual, Quarterly, and
GWA-20S/D
Discontinued Monitoring
--------------- ----------
MW-12/D
Lists
------------------------------------------
MW-21S/D
Optimized Quarterly & Semi -Annual Parameters for "Non -New Wells"
(Total)
Antimony
Manganese
Aluminum
•---------------------------------
Arsenic
•---------------------------------
---------------------------------
Molybdenum
---------------------------------
-----------------------------------------
Alkalinity (CO3/HCO3)
-----------------------------------------
Beryllium
•---------------------------------
Nickel
---------------------------------
Calcium
-----------------------------------------
Boron
Selenium
Chloride
•--------------------------------
Beryllium
---------------------------------
Strontium
-----------------------------------------
Dissolved Oxygen (DO)
•---------------------------------
Chromium (total)
---------------------------------
Sulfate
-----------------------------------------
Redox Potential (Eh)
•---------------------------------
Chromium (hexavalent)
---------------------------------
Total Dissolved Solids (TDS)
-----------------------------------------
Lithium
Cobalt
Vanadium
]--Oxidation-Reduction
Magnesium
Iron
Potential (ORP)
--------------------------------------
pH
---------------------------
Phosphorus
Potassium
Specific Conductance
-------------------------------
Sodium
-------------------------------
Radium (226+228)
-------------------------------
Total Organic Carbon (TOC)
-------------------------------
Temperature
-------------------------------
Turbiditv
IMP = Interim Monitoring Plan
CSA = Comprehensive Site Assessment
COls = Constituents of Interest
CAMA = Coal Ash Management Act
NCDEQ= North Carolina Department of Envrionmental Quality
Discontinue Sampling
Wells/Water Level Only (1)
GWA-10S
To Be Replaced (1)
BG-1D (replaced)
None
Semi -Annual monitoring events are scheduled to be performed concurrently with two Quarterly monitoring events per year and will include the wells listed under Quarterly for
(respective events.
*New wells installed as part of the CAMA program will be monitored quarterly. Samples from these wells will be analyzed for parameters formerly included as part of the 4th
Quarter 2018 IMP and additional constituents analyzed voluntarily (see Table 1). After four quarterly events, the monitoring frequency and/or parameter list for the new wells will
be re-evaluated with NCDEQ and may be reduced and/or optimized. Replacement wells will not be considered "new wells" and will follow the respective monitoring protocol for
the well in which they replace; however, additional parameters may be included voluntarily.

Table 2.8 - H.F. Lee
Wells for Quarterly
Monitoring (12)
Active Basin
ABMW-1S
AMW-15S
BGMW-9
CMW-5
DMW-2
MW-1
MW-3
Inactive Basins
IABMW-3S
IMW-4S
IMW-6S*
IMW-7S*
DMW-3
H.F. Lee Energy Complex - IMP Optimization
Summary of Wells, Sampling Frequency, & Parameters
(to begin Q1 2019)
Comprehensive Water Level Sweep to occur Semi -Annually
Modification - March 2019
Wells for Semi -Annual Monitoringt (50)
Active Basin
Inactive Basins
ABMW-1
AMW-6RBC
IABMW-1/S
IABMW-2S
AMW-11S/BC
IABMW-3
AMW-12S/BC
IMW-1S/BC
AMW-13S/BC
IMW-2BC
AMW-14S/BC
IMW-3S/BC
AMW-15BC
IMW-4BC
AMW-16BC
IMW-5S/BC
AMW-17S/BC
SMW-3
AMW-18S
SMW-4
AMW-19S/BC
BW-1
AMW-20S/BC
CW-1
AMW-22S/BC
CW-3
AMW-23S/BC
CW-4
CCR-100S
SMW-5
CMW-6R
CTMW-1
MW-2
Comprehensive Water
Level Sweeps
(includes wells in Semi-
Annual, Quarterly, and
Discontinued Monitoring
Lists)
LOLA
LLMW-1/S
LLM W-2/S
Optimized Quarterly & Semi -Annual Parameters for "Non -New Wells"
(Total)
Antimony
-------------------------------
Selenium
----------------------------------
Alkalinity (CO3/HCO3)
Arsenic
Strontium
Aluminum
-------------------------------
Barium
----------------------------------
Sulfate
Calcium
-------------------------------
Boron
----------------------------------
Thallium
Dissolved Oxygen (DO)
-------------------------------
Chloride
----------------------------------
Total Dissolved Solids (TDS)
Hexavalent Chromium
-------------------------------
Chromium (total)
-------------------------------
----------------------------------
Vanadium
Redox Potential (Eh)
Cobalt
-------------------------------
Magnesium
Iron
Nitrate + Nitrite
-------------------------------
Lithium
-------------------------------
Oxidation -Reduction Potential (ORP)
Manganese
pH
Phosphorus
Potassium
Specific Conductance
Sodium
Temperature
Turbiditv
otes
IMP = Interim Monitoring Plan
CSA = Comprehensive Site Assessment
COIs = Constituents of Interest
CAMA = Coal Ash Management Act
Discontinue Sampling
Wells/Water Level Only (9)
Active Basin
AMW-9BC
AMW-21S/BC
BGMW-10
CMW-7
CMW-8
CMW-10
DMW-1
Inactive Basins
CW-2
To Be Replaced
No well replacements planned
at this time
To be Abandoned (2)
Wells within the footprint of the
Active Basin are slated for
abandonment in 2019.
ABMW-11S
CDEQ = North Carolina Department of Envrionmental Quality
iemi-Annual monitoring events are scheduled to be performed concurrently with two quarterly monitoring events per year and will include the wells listed under "Wells for Quarterly
lonitoring" for respective events.
New wells installed as part of the CAMA program will be monitored quarterly. Samples from these wells will be analyzed for parameters formerly included as part of the 4th Quarter
018 IMP and additional constituents analyzed voluntarily (see Table 1). After four quarterly events, the monitoring frequency and/or parameter list for the new wells will be re-
valuated with NCDEQ and may be reduced and/or optimized. Replacement wells will not be considered "new wells" and will follow the respective monitoring protocol for the well in
thich they replace; however, additional parameters may be included voluntarily.

Wells for Quarterly Monitoring
(62)
AB-10SL/D/BR/BRL3*
AB-12S3/D3/BR3
AB-14D/DU
AB-15SL
AB-16DU
AB-1S3/D3/BR3/BRL3/BRLL3/BRLLL3*
AB-20S
AB-21S
AB-2BR3*
AB-3S
AB-5S3/D3/DU3/BR3
AB-6S/D/BRA/BRL
AB-7DU
AB-8DU
AL-1S3/D3/BR3/BRL3*
AL-2S/D/BR/BRL/BRLL/BRLLL3*
AL-3D/BR
AL-4D/BR/BRL
CCR-9SVDA1
GWA-2 DA
GWA-10S
GWA-15S3/D3
MW-14BR3/BRL*3
MW-6S3/D3
MW-7S3/D3
MW-8S3/D3
MW-9S3/D3
Table 2.9 - Marshall
Marshall Steam Station - IMP Optimization
Summary of Wells, Frequency, & Parameters
(to begin Q1 2019)
Comprehensive Water Level Sweep to occur Semi -Annually
Modification - March 2019
Wells for Semi -Annual Monitoringt (59)
AB-12SL3
GWA-6S3/D3
AB-14S
GWA-7S/D
AB-15D/BR
GWA-8S/D
AB-20D
GWA-9BR
AB-21D
GWA-10D
AB-2S3/D3
GWA-11S3/D3/BR3
AB-3 D
GWA-12S3/D* */BR3
AB-9S/D/BR
GWA-13S/DA**
AL-3S
GWA-14S/D
BG-1S3/D3/BRA3
MW-1
BG-2S3/B R3
M W-43/D3
BG-3S3/D3/BR3
MW-7
GWA-IS3/D3/BR3
MW-12S/D
GWA-3S/D
MW-13S/D
GWA-4S/D
MW-14S3/D3
GWA-5S/D
OB-1 (Dry Ash Landfill)
Comprehensive Water Level Sweeps (includes wells in Semi -Annual, Quarterly,
and Discontinued Monitoring Lists)
Optimized Quarterly & Semi -Annual Parameters for "Non -New" Wells
2018 CSA Update COls (Total & Dissolved if Applicable)
Additional Water Quality
Parameters (Total & Dissolved if
Applicable)
Antimony
Manganese
Aluminum
Arsenic
Molybdenum
Alkalinity (CO3/HCO3)
Barium
Nickel
Calcium
Beryllium
Radium (226+228) 3
Dissolved Oxygen (DO)
Boron
Selenium
Fluoride
Cadmium
Strontium
Lithium
Chloride
Sulfate
Magnesium
Chromium (total)
Total Dissolved Solids (TDS)
Nitrate + Nitrite
Chromium (hexavalent)
Thallium
Oxidation -Reduction Potential (ORP)
Cobalt
Vanadium
pH
Iron
Potassium
Specific Conductance
Sodium
Temperature
Total Organic Carbon (TOC)
Turbidity
Notes:
IMP = - Interim - Monitoring- -
Plan
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
CSA = Comprehensive Site Assessment
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
COIs = Constituents of Interest
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
CAMA = Coal Ash Management Act
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
NCDEQ = North Carolina Department of Envrionmental Quality
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
tSemi-Annual monitoring events are scheduled to be performed concurrently with two Quarterly monitoring events per year and will include the wells listed under Quarterly for
respective events.
*New wells installed as part of the CAMA program will be monitored quarterly. Samples from these wells will be analyzed for parameters formerly included as part of the 4th Quarter
2018 IMP and additional constituents analyzed voluntarily (see Table 1). After four quarterly events, the monitoring frequency and/or parameter list for the new wells will be re-
evaluated with NCDEQ and may be reduced and/or optimized. Replacement wells will not be considered "new wells" and will follow the respective monitoring protocol for the well in
which they replace; however, additional parameters may be included voluntarily.
** Denotes well was previously approved by DEQ to be sampled for boron and sulfate only in historic versions of the IMP due to elevated pH. Respective well is
proposed to remain a boron -and -sulfate -only sample location; however, if the pH improves with redevelopment to fall <_8.5 at such well, the well will be sampled for the
complete appropriate parameter suite for that well; i.e. "optimized non -new well" or "new well" lists as proposed herein.
1 Indicates CCR network well added to IMP per Brandy Costner request (conference call 9/5/18)
2 Well currently included on IMP list that is proposed to be removed from IMP (CAMA) sampling; will continue to be sampled under applicable landfill permit
requirements.
3Total radium to be analyzed at select locations in accordance with Q4 2018 IMP
Discontinue Sampling Wells/Water
Level Only (27)
AB-10S
AB-11S/D
AB-13S/D
AB-16S/D
AB-4S/SL/D
AB-7S/D
AB-8S/D
GWA-2S
MS-82
MS-102
MS-112
MS-132
MW-10S/D
MW-11S/D
M W-22
M W-32
M W-52
OB-1 (Ash Basin)
Recently Abandoned (5)
AB-17S/D
AB-18S/D/DU
To Be Replaced (2)
AB-17S/D

Wells for Quarterly
Monitoring (5)
ABMW-4X1
CW-21
MW-16S / D1 / BR'
Table 2.10 - Mayo
Mayo Steam Electric Plant - IMP Optimization
Summary of Wells, Frequency, & Parameters
(to begin Q1 2019)
Modification - March 2019
Wells for Semi -Annual Monitoringt (29)
ABMW-11
MW-3BR
ABMW-2 / BR / BRL
MW-SBR
ABMW-3 / S
MW-9BRL
ABMW-4D / BR
MW-12S1 / D1
BG-11
MW-13BR
BG-21
MW-18D / BR
CW-1 / D
MW-19D / BR
CW-2D1
CW-3
Comprehensive Water
Level Sweeps
CW-4
CW-5
(includes wells in Semi -
Annual, Quarterly, and
CW-61
Discontinued Monitoring
Lists)
M W-2
M W-31
Optimized Quarterly & Semi -Annual Parameters for "Non -New Wells"
Additional Water Quality
2017 CSA Update COls
(Total & Dissolved Where Applicable)
Parameters (Total & Dissolved
Where Applicable)
Arsenic
-----------------------------------
Manganese
----------------------------------
Alkalinity (CO3/HCO3)
---------------------------------------
Bariu
Molybdenum
Calcium
----------------------m -------------
Boron
----------------------------------
Radium (226+228)
---------------------------------------
Chloride
-----------------------------------
Chromium (total)
-----------------------------------
----------------------------------
Strontium
----------------------------------
---------------------------------------
Magnesium
---------------------------------------
Chromium(hexavalent)
Sulfate
Nitrate + Nitrite
------------------------------- ------------------
Cobalt
-----------------------------------
---------------------
Total Dissolved Solids (TDS)
----------------------------------
---------------------------------------
pH
---------------------------------------
Iron
-----------------------------------
Uranium (233+234+236+238)
----------------------------------
Potassium
---------------------------------------
Vanadium
____ _ Sodium ____
Total Organic Carbon (TOC)
otes
MP = Interim Monitoring Plan
k = Comprehensive Site Assessment
Is = Constituents of Interest
11CAMA = Coal Ash Management Act
CDEQ = North Carolina Department of Envrionmental Quality
Discontinue Sampling
Wells/Water Level Only (4)
M W -4
MW-8BR
MW-10BR
MW-14BR
To Be Replaced
No well replacements planned
at this time
To be Abandoned
ABMW-4
nual monitoring events are scheduled to be performed concurrently with two Quarterly monitoring events per year and will include the wells listed under Quarterly
r respective events.
New wells installed as part of the CAMA program will be monitored quarterly. Samples from these wells will be analyzed for parameters formerly included as part of the 4th
.uarter 2018 IMP and additional constituents analyzed voluntarily (see Table 1). After four quarterly events, the monitoring frequency and/or parameter list for the new wells
,ill be re-evaluated with NCDEQ and may be reduced and/or optimized. Replacement wells will not be considered "new wells" and will follow the respective monitoring
rotocol for the well in which they replace; however, additional parameters may be included voluntarily.
Select wells to be sampled for radium 226 and 228. These select wells are to be monitored for total radium. If concentrations are greater than the Federal MCL, sample
uarterly. If concentrations are less than the Federal MCL, reduce total radium sampling to semi-annually and reevaluate historical exceedances as possibly anomalous. If
etermined to be anomalous, discontinue sampling for total radium. Background wells BG-1 and BG-2 will also be included in semiannual sampling of total radium for ongoing
arative pu

Table 2.11 - Riverbend
Wells for Quarterly
Monitoring (23)
CPA-1S*/D*
CPA-2S*/D*
CPA-3S*/D*
CPA-4S*
CPA-5S*/D*
CPA-6S*
CPA-7S*/D*
GWA-11S/D
GWA-12S/D
GWA-20S
GWA-2BRU
GWA-3SA/D/BR
GWA-9D
MW-6D
Riverbend Steam Station - IMP Optimization
Summary of Wells, Frequency, & Parameters
(to begin Q1 2019)
Comprehensive Water level Sweep to Occur Semi -Annually
Modification - February 2019
Wells for Semi -Annual Monitoringt (68)
A13-8S/D
MW-1S/D
BG-1S/DA
MW-2SA/D
BG-4S/D
MW-3S/D
BG-5D/BR
MW-4S/D
GWA-1S/BRU
MW-5S/D
GWA-2S/BR
MW-6S
GWA-4S/D/BR
MW-7SR/D/BRA
GWA-5S/D
MW-8S/I/D
GWA-6S/D
M W-9/9DA/9BRA
GWA-7S/D/BR
MW-10
GWA-8S/D
MW-11SR/DR
GWA-9S/BR
MW-13
GWA-10S/BRU
MW-14
GWA-13S1
MW-15/15DA/15BR
GWA-14S/D
OB-1(water level only)
GWA-15S/D
OB-2 (water level only)
GWA-20DA/BR
Comprehensive Water
Level Sweeps
(includes wells in Semi -
Annual, Quarterly, and
Discontinued Monitoring
Lists)
GWA-22S/D/BRA
Optimized Quarterly & Semi -Annual Parameters for "Non -New Wells"
(Total)
Antimony
Iron
Aluminum
Arsenic
Manganese
Alkalinity (CO3/HCO3)
Beryllium
Strontium
Calcium
Boron
Sulfate
Dissolved Oxygen (DO)
Chromium (total)
Total Dissolved Solids (TDS)
Redox Potential (Eh)
Chromium (hexavalent)
Vanadium
Lithium
Cobalt
Magnesium
Molybdenum
Nickel
Nitrate + Nitrite
Oxidation -Reduction Potential (ORP)
pH
Phosphorus
Potassium
Sodium
Specific Conductance
Temperature
Thallium
Turbidity
Not
IIMP = Interim Monitoring Plan
, = Comprehensive Site Assessment
s = Constituents of Interest
CIA = Coal Ash Management Act
INCDEQ = North Carolina Department of Environmental Quality
Discontinue Sampling
Wells/Water Level Only (10)
BG-2S/D/BR
BG-3S/D
BG-4BR
GWA-13D
GWA-21S/D/BR
To Be Replaced (4)
GWA-9BRA
GWA-20BRA
GWA-22SA
M W -4SA
7 7GWA-23S/D7
ItSemi-Annual monitoring events are scheduled to be performed concurrently with two Quarterly monitoring events per year and will include the wells listed under Quarterly for
respective events.
*New wells installed as part of the CAMA program will be monitored quarterly. Samples from these wells will be analyzed for parameters formerly included as part of the 4th Quarter
2018 IMP and additional constituents analyzed voluntarily (see Table 1). After four quarterly events, the monitoring frequency and/or parameter list for the new wells will be re-
evaluated with NCDEQ and may be reduced and/or optimized. Replacement wells will not be considered "new wells" and will follow the respective monitoring protocol for the well in
which they replace; however, additional parameters may be included voluntarily.
1 GWA-13S will be temporarily sampled until replacement well GWA-22SA is installed. After GWA-22SA is installed:
1. Sampling of GWA-13S will be discontinued
2. Semi-annual water level measurements of GWA-13S will continue
3. Semi-annual sampling and water level measurements of GWA-22SA will begin

Table 2.12 - Roxboro
Wells for Quarterly Monitoring* (5)
CCR-113BR
CCR-113D
HWMW-1BR
GMW-08R
MW-21BRLR
Roxboro Steam Electric Plant - IMP Optimization
Summary of Wells, Frequency, & Parameters
(to begin Q1 2019)
Modification - March 2019
Wells for Semi -Annual Monitoringt (73)
ABMW-01 (+)
GPMW-1BR
MW-17BR(+)
ABMW-01BR (+)
GPMW-ID
MW-18BR (+)
ABMW-02 (+)
GPMW-1S
MW-18D (+)
ABMW-02BR (+)
GPMW-2BR
MW-19BRL (+)
ABMW-03
GPMW-2D
MW-20BRL
ABMW-03BR
GPMW-3BR
MW-22BR
ABMW-03BRL
GPMW-3D
MW-22D
ABMW-05D (+)
MW-01BR
MW-23BRR
ABMW-06
MW-02 (+)
MW-24BR
ABMW-06BR
MW-02BR
MW-26BR
ABMW-07BR
MW-03BR (+)
MW-27BR
ABMW-07BRL
MW-04BR
MW-28BR
BG-01 (+)
MW-05BR (+)
MW-29BR
BG-01BR (+)
MW-05D (+)
MW-30BR
BG-01BRLR (+)
MW-06BR (+)
MW-31BR
BG-2BR (+)
MW-06D (+)
MW-32BR
CW-01
CW-02 (+)
MW-07BR
MW-08BR
MW-33BR**
Comprehensive Water
Level Sweeps
(includes wells in
Semi -Annual,
Quarterly, and
Discontinued
Monitoring Lists)
CW-02D (+)
MW-09BR (+)
CW-03
MW-10BR (+)
CW-03D
MW-11BR (+)
CW-04
MW-11D (+)
CW-05 (+)
MW-12BR
GMW-06
MW-13BR (+)
GMW-07
MW-14BR (+)
GMW-09
MW-15BR (+)
GMW-10
MW-15D (+)
GMW-11
MW-16BR (+)
Optimized Quarterly & Semi -Annual Parameters for "Non -New Wells"
2017 CSA Update COls
Additional Water Quality Parameters (Total & Dissolved
(Total & Dissolved Where Applicable)
Where Applicable)
Antimony
Sulfate
Aluminum
Boron
Total Dissolved Solids (TDS)
Alkalinity (CO3/HCO3)
Chromium (hexavalent)
Uranium (233+234+236+238)
Arsenic
Chromium (total)
Vanadium
Calcium
Cobalt
Chloride
------------- --------------------
Iron
-----------------------------------------
•--------------------------------------------------------------------------------
Dissolved Oxygen (DO)
Manganese
Redox Potential (Eh)
Molybdenum
Lithium
Selenium
---------------------------------
-----------------------------------------
Magnesium
•--------------------------------------------------------------------------------
Strontium
Nitrate + Nitrite
----------------------- ----------------------------------------------------------
Oxidation-Reduction Potential (ORP)
----------- ------
pH
-------------------------------------------
7-------------------------------------
Potassium
•--------------------------------------------------------------------------------
Radium (226+228) (+)
---------------------------- ----------------------
Specific Conductance
•--------------------------------------------------------------------------------
Sodium
- - - - - - - - - - - - - - - - - - - - - - - - - -
Total Organic Carbon (TOC)
Temperature
Turbidity
Discontinue Sampling
Wells/Water Level Only (2)
ABMW-05
MW-25BR
To Be Replaced
No well replacements planned at
this time
To be
No wells are schedu7tobeabandoned at thi
Notes:
IMP = Interim Monitoring Plan
CSA = Comprehensive Site Assessment
COls = Constituents of Interest
CAMA = Coal Ash Management Act
NCDEQ= North Carolina Department of Environmental Quality
tSemi-Annual monitoring events are scheduled to be performed concurrently with two Quarterly monitoring events per year and will include the wells listed under Quarterly
for respective events.
*New wells installed as part of the CAMA program will be monitored quarterly. Samples from these wells will be analyzed for parameters formerly included as part of the 4th
Quarter 2018 IMP and additional constituents analyzed voluntarily (see Table 1). After four quarterly events, the monitoring frequency and/or parameter list for the new wells
will be re-evaluated with NCDEQ and may be reduced and/or optimized. Replacement wells will not be considered "new wells" and will follow the respective monitoring
protocol for the well in which they replace; however, additional parameters may be included voluntarily.
** Denotes well was previously approved by DEQ to be sampled for boron and sulfate only in historic versions of the IMP due to elevated pH. Respective well is proposed to
remain a boron -and -sulfate -only sample location; however, if the pH improves with redevelopment to fall <_8.5 at such well, the well will be sampled for the complete
appropriate parameter suite for that well; i.e. "optimized non -new well" or "new well" lists as proposed herein.
(+) -Select wells to be sampled for total radium (226 + 228).

Table 2.13 - Sutton
L.V. Sutton Energy Complex - IMP Optimization
Summary of Wells, Frequency, & Parameters
(to begin Q1 2019)
Comprehensive Water Level Sweep to occur Semi -Annually
Modification - March 2019
Wells for Quarterly Monitoring (38)
Wells for Semi -Annual Monitoringt (48)
MW-12R
MW-45B*
AW-03C
MW-40C
M W-33C
M W-45C*
AW-04C
SMW-04C
SMW-01C
MW-46B*
AW-05C
SMW-05C
SMW-02C
MW-46C*
AW-08C
SMW-06C
SMW-03C
MW-47B*
AW-09C
MW-05C
MW-08B
MW-47C*
MW-07C
MW-05CD
MW-08D
MW-41B
MW-41C
MW-48B*
MW-48C*
MW-49B*
MW-16D
MW-05D
MW-05R-E
MW-08
MW-20
MW-20D
MW-41D
MW-49C*
MW-21C
MW-08E
FPA-1B*
MW-50B*
MW-22C
MW-37B
FPA-1C*
MW-50C*
MW-23B
MW-37C
FPA-2B*
MW-23C MW-37CD
MW-23D MW-37D
MW-23E MW-37E
MW-24RB MW-41E
MW-24RC ABMW-02D
MW-27B ABMW-02S
MW-27C MW-16
MW-28C MW-36B
MW-31R-C SMW-01B
MW-36C SMW-05B
MW-38C SMW-06B
MW-39C MW-05B
Comprehensive Site Semiannual water level sweep (includes wells in
Semi -Annual, Quarterly, and Discontinued Monitoring Lists)
FPA-2C*
FPA-3B*
FPA-3C*
FPA-4B*
FPA-4C*
MW-13R*
MW-13R-D*
MW-15R*
MW-15R-D*
MW-43B*
MW-43C*
MW-44B*
M W-44C*
Optimized Quarterly & Semi -Annual Parameters for "Non -New" Wells
(Total)
Arsenic
Strontium
Alkalinity (CO3/HCO3)
Boron
Sulfate
Aluminum
Chloride
TDS (Total Dissolved Solids)
Barium
Chromium (hexavalent)
Vanadium
Calcium
Cobalt
Dissolved Oxygen (DO)
Iron
----------------------------------------
-------------------------------------------
Lithium
--------------------------------------------------------
Manganese
Magnesium
Molybdenum
Nitrate + Nitrite
pH
Oxidation -Reduction Potential (ORP)
Selenium
Potassium
Redox Potential (Eh)
•--------------------------------------------------------
Sodium
•--------------------------------------------------------
Specific Conductance
--------------------------------------------------------
Temperature
•--------------------------------------------------------
Total Organic Carbon (TOC)
•-----------------------Fluoride ----------------------
------------------------ -------------------------------
Turbidity
Discontinue Sampling Wells/Water
Level Only
(20)
AW-01C
AW-02C
AW-02 D
AW-05 D
AW-06R-D
AW-06R-E
AW-07R-D
AW-09 D
MW-11
MW-19
MW-22B
MW-28B
MW-32C
MW-38B
MW-38D
MW-39B
MW-39D
M W-40 B
MW-40D
SMW-06D
To Be Replaced
No well replacements planned at this
time
Abandoned/To be Abandoned
No wells are scheduled to be
abandoned at this time.
IMP = Interim Monitoring Plan
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
CSA = Comprehensive Site Assessment
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
COIs = Constituents of Interest
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
CAMA = Coal Ash Management Act
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
NCDEQ = North Carolina Department of Envrionmental Quality
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
tSemi-Annual monitoring events are scheduled to be performed concurrently with two Quarterly monitoring events per year and will include the wells listed under Quarterly for respective events.
Twi-w ---wells------installed----------as---part------of----the-------CAMA------------program wi-----ll--be----monitored----------------------quarterly.-------Samples----------from---these----------lls---will-----be------------analyzed---for---------parameters------------formerly--------
in----cluded-----as---part------of----the---4th-----Quarter-----------2018------IMP-------and ----------
*Newe
additional constituents analyzed voluntarily (see Table 1). After four quarterly events, the monitoring frequency and/or parameter list for the new wells will be re-evaluated with NCDEQ and may be
reduced and/or optimized. Replacement wells will not be considered "new wells" and will follow the respective monitoring protocol for the well in which they replace; however, additional parameters
may be included voluntarily.

Wells for Quarterly Monitoring
(20)
BW-4DA*
CPA-1S*/I*
CPA-21 *
CPA-3S*/I *
CPA-4S*/I*
CPA-5S*/I *
CPA-6S*/I*
CPA-7S*/I*
CPA-8S*/I*
MW-2 (fuel oil well)*
MW-4 (fuel oil well)*
M W-5511
PW-1 (DEP #2)
Table 2.14 - Weatherspoon
Weatherspoon Power Plant - IMP Optimization
Summary of Wells, Frequency, & Parameters
(to begin Q1 2019)
Comprehensive Water Level Sweep to occur Semi -Annually
Modification - March 2019
Wells for Semi -Annual Monitoringt (26)
AW-02S
MW-33S/I/D
AW-03S/I
MW-411
BW-2S1
MW-521
BW-3S1/11
AW-04S
BW-4S1/11
AW-05S
CCR-101-BG1
AW-06S
CW-2
BW-5S
CW-31
CCR-1071
MW-11
MW-41
MW-21
MW-51
M W-31
Comprehensive Water Level Sweeps(includes wells in Semi -Annual,
Quarterly, and Discontinued Monitoring Lists)
Optimized Quarterly & Semi -Annual Parameters for "Non -New Wells"
(Total)
Aluminum
Manganese
Alkalinity (CO3/HCO3)
Arsenic
Molybdenum
Calcium
Barium
Nickel
Dissolved Oxygen (DO)
Beryllium
Radium (226 + 228)
Fluoride
Boron
Selenium
Lithium
Chloride
Strontium
Magnesium
Chromium (total)
Sulfate
Nitrate + Nitrite
Chromium (hexavalent)
Thallium
Oxidation -Reduction Potential (ORP)
Cobalt
Total Dissolved Solids (TDS)
pH
Copper
Vanadium
Potassium
Iron
Uranium (233+234+236+238)
Specific Conductance
Lead
Zinc
Sodium
Temperature
Turbidity
Redox Potential (Eh)
Discontinue Sampling Wells/Water
Level Only (14)
AW-01S/I/D
AW-02D
AW-03D
BW-01
BW-3D
BW-4D
CW-1
MW-41D
MW-531/D
M W-54D
MW-55D
To Be Replaced (2)
MW-6 (replaced by CCR-107)
MW-7 (replaced by CCR-107)
To Be Abandoned (2)
M W-6
M W-7
Notes:
IMP = Interim Monitoring Plan
CSA = Comprehensive Site Assessment
CCIs = Constituents of Interest
CAMA = Coal Ash Management Act
NCDEQ= North Carolina Department of Envrionmental Quality
1 - Wells to be sampled for radionuclides (also bolded text)
tSemi-Annual monitoring events are scheduled to be performed concurrently with two Quarterly monitoring events per year and will include the wells listed under Quarterly for respective events.
*New wells installed as part of the CAMA program will be monitored quarterly. Samples from these wells will be analyzed for parameters formerly included as part of the 4th Quarter 2018 IMP and additional constituents analyzed
voluntarily (see Table 1). After four quarterly events, the monitoring frequency and/or parameter list for the new wells will be re-evaluated with NCDEQ and may be reduced and/or optimized. Replacement wells will not be
considered "new wells" and will follow the respective monitoring protocol for the well in which they replace; however, additional parameters may be included voluntarily.

TABLE 3
Proposed Sampling Schedules & Respective CAMA Data Submittals
Duke Energy - 14 North Carolina Facilities
(to begin Q1 2019)
Facility Name
a
L
s
N
L
L
L
£_
L
to
Q,
ate+
>
V
of
O
Z
C
Allen
C
Q
SA
D
Q
D
SA
Asheville
SA
Q
SA
D
Q
D
Belews Creek
SA
Q
SA
D
Q
D
Buck
D
Q
SA
D
Q
D
SA
Cape Fear*
D*
SA/
Q
D
SA
D
Q
Cliffside
SA
Q
D
SA
D
Q
D
Dan River
SA
D
Q
D
SA
D
Q
H.F. Lee**
SA
Q
D
SA
Q
Marshall
SA
Q
D
SA
D
Q
Mayo
Q
SA
Q
D
SA
D
Riverbend*
SA
Q
SA
Q
Roxboro**
Q
SA
Q
D
SA
D
Sutton
Q
D
SA
D
Q
D
SA
Weatherspoon
Q
D
SA
D
Q
D
SA
D
* There will be (1) Q1 Data Submittal per site per year; however, for Cape Fear and Riverbend, the Data
Submittal months for Q1 2019 are not the same as what is planned for 2020 and beyond. This effect is due to
the timing of the previous Q4 2018 sampling event. For Cape Fear, the Q1 Data Submittal will be a February
submittal in 2019 only and will shift to a January submittal in 2020. For Riverbend, the Q1 Data Submittal will
be a March submittal in 2019 only and will shift to a January submittal beginning in 2020.
**NPDES Ash Basin Sampling could cease upon receipt of NPDES Permit Modification
D = Data Submittal (End of Month)
Q = Quarterly CAMA event
SA = Semi annual CAMA event
Non-CAMA Compliance Categories
NPDES Ash Basin and Landfill Sampling
NPDES Ash Basin Sampling
Landfill Sampling

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
LINDA CULPEPPER
Director
Paul Draovitch
Senior Vice President
Environmental, Health & Safety
Duke Energy
526 South Church Street
Mail Code EC3XP
Charlotte, North Carolina 28202
NORTH CAROLINA
Environmental Quality
April 4, 2019
Subject: Response to the Optimized Interim Monitoring Plans (IMP) for 14 Duke Energy
Facilities - Modification Request Annual Reports - Modification Request
Dear Mr. Draovitch:
On March 20, 2019, the North Carolina Department of Environmental Quality Division of Water
Resources (Division) received the proposed Optimized IMP for 14 Duke Energy Facilities -
Modification Request Annual Reports - Modification Request (Modification Request). This letter
requested changes to direction provided to Duke Energy by the Division in the December 21, 2018
correspondence concerning the Optimized IMP along with proposed changes to the scope and/or
reporting schedule for Interim Action Effectiveness Reports for the Asheville, Belews Creek, and
Sutton facilities.
Modification of Interim MonitoringPlan
lans
The Division has reviewed and hereby approves Modification Request for implementation of the
Optimized IMPS apart from the following which require justification subject to approval. The
following changes were noted from the previous optimized IMPs approved by the Division on
December 21, 2018.
• Asheville
O Wells EXT-D and MW-8BR were moved from quarterly sampling to water
level only. Please provide justification for this change.
• Belews Creek
O Wells AB-1BRD, AB-2BR, AB-2BRD, and AB-3BRD were removed from
quarterly sampling. Please provide justification for this change.
North Carolina Department of Environmental Quality I Division of Water Resources
QE J 512 North Salisbury Street 1 1636 Mail Service Center I Raleigh, North Carolina 27699-1636
919.707.9000

• Roxboro
o Wells ABMW-7BRLL, MW-01BRL, MW-108BRL, MW-205BRL, and
MW-208BRL were removed from quarterly sampling. Please provide
justification for this change.
IMP Annual Monitoring Reports
The Division has reviewed and hereby approves the Modification Request concerning the due
dates for the IMP Annual Monitoring Reports. The due dates for these reports shall be as follows:
• April 30, 2019 —Allen, Belews Creek, Cliffside, Marshall, Mayo, and Roxboro.
• July 31, 2019 — Asheville, Buck, Cape Fear, Dan River, H. F. Lee, Riverbend, Sutton,
and Weatherspoon.
Interim Action Effectiveness Reports
The Division has reviewed and hereby approves Modification Request concerning Interim Action
Effectiveness Reports. The due dates for these reports shall be as follows:
May 15, 2019 — Sutton
July 31, 2019 — Asheville and Belews Creek
Revisions to the tables in the Modification Request are expected based on the detailed review items
documented in this letter unless compelling rationale is provided to substantiate these changes to
the December 21, 2018 Optimized IMP direction. The Division may require changes to the content,
format and schedule of the IMP Annual Monitoring Reports and Interim Action Effectiveness
Reports after review of the pending submittals.
If you have any questions, please contact Steve Lanter (Central Office) at [phone].
Sincerel , l
Jon Risga a d, Chief
Animal Feeding Operations and Groundwater Section
cc: WQROS Regional Offices
WQROS Central File Copy

Wells for Quarterly Monitoring
(62)
AB-10SL/D/BR/BRL''
AB-12S3/D'/BR'
AB-14D/DU
AS-15SL
AB-16DU
AB-SS'/D'/B R'/B RLs/B RLLs/BRLLL3'
AB-20S
AB-21S
AS-28R''
AB-3S
AB-5S3/D3/DU'/BR'
AB-6S/D/BRA/BRL
AB-7DU
AB-8DU
AL-1S'/D'/BR3/BRCj
AL-2S/D/BR/BRL/B RLL/B RLLL3'
AL-3D/BR
AL4D/BR/BRL
CCR-9S'/DA'
GWA-2DA
GWA-105
GWA-SSS'/D'
MW-14BR'/BRL''
MW-6S3/D3
MW-753/D'
MW W!D'
MW-9S3/D'
Table 2.9 - Marshall
Marshall Steam Station - IMP Optimization
Summary of Wells, Frequency, & Parameters
(to begin Q12019)
Comprehensive Water Level Sweep to occur Semi -Annually
Modfffcatlon - March 2019
Weill fur Semi -Annual Monitoringt (59)
AB-12SL3 _ GWA-6S'/D'
AB-14S GWA-7S/D
AB-15D/BR
GWA-8S/D
AB-20D
GWA-9BR
AB-21D
GWA-10D
AB-2S'/D'
GWA-11S'/D3/BR'
AB-31)
GWA-12S'/D"/BR'
AB-9S/D/BR
GWA-13S/DA"
AL-3S
GWA-145/D
BG-iS'/D3/BRA'
MW-1
BG-253/BR3
MW43/D'
BG-3S3/D'/BR3
MW-7
GWA-1S'/D'/BR3
MW-125/D
GWA-3S/D
MW-13S/D
GWA-4S/D
MW-14S3/D'
GWA-5S/D
OB-1(Dry Ash Landfill)
Comprehensive Water Level Sweeps (includes wells in Semi -Annual, quarterly,
and Discontinued Monitoring Lists)
Optimized Quarterly & Semi -Annual Parameters for "Non -New" Wells
2018 CSA Update MIS (Total & Dissolved if Applicable)
Additional Water quality
Parameters (Total & Dissolved if
Applicable)
Antimony
Manganese
Aluminum
Arsenic
Molybdenum
Alkalinity (003/1-1003)
Barium
Nickel
Calcium
Beryllium
Radium (226+228) 3
Dissolved Oxygen (DO)
Boron
Selenium
Fluoride
Cadmium
Strontium
Lithium
Chloride
Sulfate
Magnesium
Chromium (total)
Total Dissolved Solids (TDS)
Nitrate+Nitrite
Chromium hexavalent)
Thallium
Oxidation -Reduction Potential rORP)
Cobalt
Vanadium
pH
Iron
Potassium
Specific Conductance
Sodium
• Temperature
Total Organic Carbon (toci
Turbidity
Notes:
IMP = Interim Monitoring Plan
CSA = Comprehensive Site Assessment
Cots = Constituents of Interest
CAMA = Coal Ash Management Act
NCDEQ= North Carolina Department of Envdonmental Quality
t5emi-Annual monitoring events are scheduled to be perfom ed concurrently with two Quarterly monitoring events per year and will include the wells listed under Quarterly for
respective events.
*New wells installed as part of the CAMA program will be monitored quarterly. Samples from these wells will be analyzed for parameters formerly included as part ofthe 4th Quarter
2018 IMP and additional constituents analyzed voluntarily (see Table 1). After four quarterly events, the monitoring frequency and/or parameter list for the new wells will be re-
valuated with NCDEQ and may be reduced and/or optimized. Replacement wells will not be considered "new wells" and will follow the respective monitoring protocol for the well in
which they replace; however, additional parameters may be included voluntarily.
" Denotes well was previously approved by DEQto be sampled for boron and sulfate only in historic versions of the IMP due to elevated pH. Respective well is
proposed to remain a boronand-sulfateonly sample location; however, if the pH improves with redevelopment to fall 58.5 at such well, the well will be sampled for the
complete appropriate parameter suite for that well; i.e. "optimized non -new well" or "new well" lists as proposed herein.
t Indicates OCR network well added to IMP per Brandy Costner request (conference call 9/5/18)
Fall currently Included on IMP list that is proposed to be removed from IMP (LAMA) sampling; will continue to be sampled under applicable landfill permit
requirements.
'Total radium to be analyzed at select locations in accordance with 04 2018 IMP
Discontinue Sampling Wells/Water
Level Only (27)
AB-10S
AB-11S/D
AB-13S/D
AB-16S/D
A84S/SL/D
AB-75/D
AB-8S/D
GWA-2S
MS-8z
MS-10,
MS-11z
MS-13z
MW-10S/D
MW-33S/D
M W-2z
MW-3z
MW-5z
08.1 fAth Basin
AB-17S/D
AB-18S/D/DU
To Be Replaced (2)
AB-175 D