NC0004979_Allen_Appendix F_20191231

Corrective Action Plan Update December 2019
Duke Energy Carolinas, LLC - Allen Steam Station
APPENDIX F
SynTerra
FRACTURED BEDROCK EVALUATION REPORT

tip
synTerra
FRACTURED BEDROCK EVALUATION
ALLEN STEAM STATION
253 PLANT ALLEN ROAD
BELMONT, NC 28012
DECEMBER 2019
PREPARED FOR
& DUKE
Vo ENERGY.
CAROLINAF
DUKE ENERGY CAROLINAS, LLC
Lee Drago
Project Scientist
Chris Suttell, NC LG 2426
Project Manager

Fractured Bedrock Evaluation December 2019
Duke Energy Carolinas, LLC - Allen Steam Station SynTerra
TABLE OF CONTENTS
SECTION PAGE
1.0
INTRODUCTION.........................................................................................................1-1
2.0
LINEAMENT EVALUATION....................................................................................
2-1
2.1
Imagery Selection......................................................................................................2-1
2.2
Lineament Selection and Summary........................................................................
2-1
3.0
DEEP BEDROCK EVALUATION FIELD PROCEDURES AND
IMPLEMENTATION...................................................................................................
3-1
3.1
Purpose.......................................................................................................................
3-1
3.2
Drilling Methodology and Well Design................................................................
3-1
3.3
Well Development....................................................................................................
3-4
3.4
Hydraulic Conductivity Measurements................................................................
3-4
3.5
Deep Bedrock Groundwater Sampling..................................................................
3-4
4.0
BEDROCK FRACTURE EVALUATION METHODS ...........................................
4-1
4.1
Flow Profile Characterization.................................................................................
4-1
4.2 Fracture Hydraulic Apertures.................................................................................4-3
4.3 Fracture Spacing........................................................................................................4-4
4.4 Fracture Orientation Plots and Statistics............................................................... 4-5
4.5 Summary of Bedrock Fracture Characteristics..................................................... 4-6
4.6 Implications of Bedrock Fracture Network for Groundwater Flow..................4-6
5.0 BEDROCK MATRIX CHARACTERISTICS...........................................................5-1
5.1 Sample Selection........................................................................................................5-1
5.2 Matrix Porosity and Bulk Density.......................................................................... 5-1
5.3 Petrographic Evaluation.......................................................................................... 5-2
5.4 Implications of Bedrock Matrix Characteristics for Flow and Transport ......... 5-2
6.0 REFERENCES................................................................................................................ 6-1
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LIST OF FIGURES
Figure 1A
1949 USGS Topographic Map without Lineaments
Figure 1B
1949 USGS Topographic Map with Lineaments
Figure 2A
1948 Aerial Photograph without Lineaments
Figure 2B
1948 Aerial Photograph with Lineaments
Figure 3
Deep Bedrock Evaluation Locations
Figure 4
Hydraulic Conductivity Vertical Profiles
Figure 5
Hydraulic Aperture Vertical Profiles
Figure 6
Fracture Spacing Vertical Profile
Figure 7
General Cross Section A -A'
Figure 8
General Cross Section B-B'
Figure 9
General Cross Section C-C'
Figure 10
General Cross Section D-D'
Figure 11
General Cross Section E-E'
LIST OF TABLES
SynTerra
Table 1 Analytical Results for Deep Bedrock Wells
Table 2 Porosity and Bulk Density Results
LIST OF ATTACHMENTS
Attachment A Boring Logs, Well Construction Records, and Well Development
Logs
Attachment B USGS FLASH Results and Calculations
Attachment C Geophysical Logging Report
Attachment D Petrographic Evaluation of Core Samples
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LIST OF ACRONYMS
02L
North Carolina Administrative Code, Title 15A, Subchapter 02L,
Groundwater Classification and Standards
Allen
Allen Steam Station
ASTM
American Society for Testing and Materials
bgs
below ground surface
CAMA
Coal Ash Management Act
CAP
Corrective Action Plan
Core Labs
Core Laboratories
COI
Constituent of Interest
CSA
Comprehensive Site Assessment
DEC
Duke Energy Carolinas
Duke Energy Duke Energy Carolinas, LLC
en
hydraulic aperture
FLASH
Flow -Log Analysis of Single Holes
g
acceleration due to gravity
g gram
9/cm3 grams per cubic centimeter
GEL Gel Solutions
gpm gallons per minute
HPF heat pulse flowmeter
I.D. inner diameter
IDW investigation derived waste
IMAC Interm Maximum Allowable Concentrations
IMP Interim Monitoring Plan
Ka distribution coefficient
µ viscosity of water
µg/L micrograms per liter
µm microns
mm millimeters
n number of individual fractures in a flow layer
NCAC North Carolina Administrative Code
NCDENR North Carolina Department of Environment and Natural Resources
NTU nephelometric turbidity unit
p W density of water
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LIST OF ACRONYMS (CONTINUED)
PSI
Pounds per Square Inch
PVC
polyvinyl chloride
Q
flow rate
ro
radius of influence
rW
radius of borehole
s
well drawdown
SAEDACCO South Atlantic Environmental Drilling and Construction Co.
Site
Allen Steam Station (entire property)
SP
spontaneous potential
SPR
single point resistance
Station
Allen Steam Station (actual facility)
TD
total depth
USGS
United States Geological Survey
SynTerra
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1.0 INTRODUCTION
This report provides a detailed characterization of the bedrock near the ash basin at the
Allen Steam Station (Allen, Site, or Station). The characterization is based on additional
evaluation of lineaments, the bedrock fracture system, and the bedrock matrix. The
information in this report supplements information presented in the Comprehensive
Site Assessment (CSA) Update (SynTerra, 2018). This report also supports the
development of groundwater remediation alternatives that are part of the Allen
Corrective Action Plan (CAP).
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2.0 LINEAMENT EVALUATION
To supplement the CSA bedrock characterization and support the CAP for the ash
basins and coal pile at Allen, SynTerra evaluated lineaments in the vicinity of the Site.
Lineaments are linear features at ground surface that might have resulted from
underlying bedrock fractures, fracture zones, faults, or other geologic structures.
Lineaments represent the approximate area of preferential groundwater flow zones in
bedrock.
2.1 Imagery Selection
Aerial imagery and topographic survey information used for the lineament evaluation
met the following criteria:
• The image or survey must have been produced prior to the first ash basin
construction (1957).
• The scale and resolution are sufficiently detailed to identify apparent linear
features not caused by anthropogenic activity.
The following image and survey data were selected:
• 1949 Clover United States Geological Survey (USGS) Topographic Map (1:62500)
and 1949 Charlotte West North Carolina Topographic Map (1:24000) obtained
from the USGS store at http://store.usgs.gov/b2c usgs/b2c/start/%%%28xcm
=r3standardpitrex_prd%%%29/.do (Figure 1A)
• May 15, 1948, Aerial Photograph obtained from the USGS Earth Explorer website
at http://earthexplorer.usgs.gov. (Figure 2A)
2.2 Lineament Selection and Summary
The following list developed by the USGS (Clark et al., 2016) summarizes types of
features that were used to identify lineaments in this evaluation:
• Linear topographic features
• Straight stream segments
• Aligned gaps in ridges
• Vegetation
Areas near the Allen ash basins and coal pile — between the South Fork Catawba River
and the Catawba River (Lake Wylie), and between the northern and southern extents of
the Duke Energy Carolinas parcel lines — were visually reviewed to identify linear
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features. The selected aerial photograph and topographic maps were evaluated
separately.
Lineaments identified on the 1949 USGS topographic survey map are presented on
Figure 1B, and lineaments identified on the 1948 aerial photograph are presented on
Figure 2B. Lineament orientations from each image have been summarized on a 360-
degree compass rose to identify general trends.
Observations from the topographic survey and aerial photograph review are
summarized as follows:
1949 USGS Topographic Maps
• 16 linear features identified
• Primary group oriented southeast — northwest with 62.5 percent of the
identified lineaments between azimuths of 88 degrees and 126 degrees
1950 Aerial Photograph
• 14 linear features identified
• Primary group oriented southeast — northwest with 64.3 percent of the
identified lineaments between azimuths of 87 degrees and 130 degrees
General agreement on seven linear features (approximately 50 percent).
These data indicate a predominant lineament orientation of northwest -southeast, with
relatively fewer cross -cutting lineaments of various orientations.
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3.0 DEEP BEDROCK EVALUATION FIELD PROCEDURES AND
IMPLEMENTATION
3.1 Purpose
To refine the Site conceptual model and further improve the accuracy of model
predictions that are being prepared for the CAP, additional bedrock wells were
recommended for installation adjacent to ash basin dams and in areas of known
bedrock impacts. The locations selected for additional bedrock evaluation are presented
on Figure 3. Additional data regarding the occurrence of water -bearing fracture(s) and
the presence or absence of constituents potentially derived from the ash basins were
needed to further evaluate constituent transport and distribution. Therefore, the scope
of work described in this section was implemented to evaluate deep bedrock
groundwater quality near the dam structures and refine hydraulic conductivity
assumptions for the bedrock matrix and potential water -bearing fractures in the area.
3.2 Drilling Methodology and Well Design
Monitoring wells were installed in accordance with 15A North Carolina Administrative
Code (NCAC) 02C .0108 Standards of Construction: Wells Other Than Water Supply. Drilling
was conducted by South Atlantic Environmental Drilling and Construction Co.
(SAEDACCO). Drilling oversight and lithologic logging of drill cuttings were
conducted by SynTerra scientists, with extensive training and education in geology.
Boring advancement and well design/installation were similar for the five deep bedrock
evaluation locations.
Mud rotary drilling techniques were used to drill through unconsolidated material to
refusal (top of bedrock) at each location. These borings measured 143/4 inches in
diameter. A permanent 10-inch diameter, schedule 80 flush -joint threaded polyvinyl
chloride (PVC) outer casing was installed to the depth of mud rotary refusal. The casing
was fitted with a grout shoe seated into the top of rock and tremie-grouted into place.
Any casings that exceeded 100 feet were grouted in at least two lifts with approximately
80 feet per lift. After the grout cured (at least 24 hours), pneumatic air hammer
technology utilizing a 9.875-inch drill bit advanced the boring through the 10-inch
casing to a target depth. The target depth was approximately 30 feet below the screen
interval of the deepest adjacent monitoring well where constituents of interest (COIs)
were detected at concentrations greater than North Carolina Administrative Code, Title
15A, Subchapter 02L, Groundwater Classification and Standards (02L), Interim
Maximum Allowable Concentrations (IMAC), or background values. Once the boring
reached its target depth, a 6-inch diameter, schedule 80 flush -joint threaded PVC casing
was installed and tremie-grouted into place. Any casings that exceeded 100 feet were
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grouted in at least two lifts with approximately 80 feet per lift. After the grout cured (at
least 24 hours), pneumatic air hammer technology utilizing a 5.875-inch drill bit
advanced the boring to a prescribed total depth (TD) of 500 feet below ground surface
(bgs), with the exception of GWA-3BRL.
At GWA-3BRL, a notable water -bearing zone was encountered at 466 feet bgs, which
produced approximately 5 gallons per minute (gpm) under flowing, artesian
conditions. Drilling continued until the water production of the borehole outpaced the
investigation derived waste (IDW) containment capabilities. The boring was completed
at a TD of 472 feet bgs. During geophysical evaluation of the borehole, televiewer
logging indicated multiple fractures at the approximate depth of 466 feet bgs.
During the air hammer boring advancement below the 6-inch PVC casing, potential
fractures were noted based on driller and drill rig observations. Estimated yield of
water -bearing zones was determined through downhole circulation after each 10-foot
run. Upon determination of a potential water -bearing fracture or fracture zone [yielding
approximately 1 (gpm) or more], a sample was collected by air -lifting formation water
from the borehole. The sample was screened for boron with a Hach TNT877
spectrophotometer. Samples were field -filtered with a 0.45 micron (µm) filter to reduce
influence of turbidity (i.e., suspended solids) on screening results. The Hach TNT877
test kit enables detection of boron concentrations from 50 micrograms per liter (µg/L) to
2,500 µg/L (note the 02L standard for boron is 700 µg/L).
Screening results represent a composite sample from the length of the packered-off
interval within the open borehole or the entire open borehole. Screening results
provided a profile of constituent concentrations, with depth, and were considered
during the well design process. The presence or absence of boron at depth is significant
for refining groundwater model assumptions and defining the extent of constituents
potentially derived from the ash basins.
Boron concentrations greater than the 02L standard of 700 µg/L were not encountered
during the drilling process. Borings were advanced until reaching the prescribed TD to
help delineate the vertical extent of boron to concentrations less than the regulatory
standard. Vertical evaluation at each location was deemed complete when the specified
TD was reached. Field screening results from each boring at TD indicated
concentrations less than the regulatory standard.
Upon reaching TD at each boring, geophysical logging was conducted using the
following downhole tools: acoustic televiewer, optical televiewer, caliper, fluid
conductivity, fluid temperature, single point resistance (SPR), spontaneous potential
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(SP), and heat pulse flowmeter (HPF). At the northernmost boring location
downgradient of the retired ash basin dam (GWA-5BRL), and at the southernmost
boring location downgradient of the active ash basin dam (AB-10BRL), geophysical
logging was completed in the upper, or "top," column of open borehole throughout
existing screened intervals prior to installation of the 6-inch surface casing. After the
surface casing was drilled through and the borehole reached TD, the second, or
"bottom," column of open borehole was also logged.
At each deep bedrock well, with the exception of GWA-3BRL, a portion of the open
borehole was backfilled with a bentonite clay plug to facilitate well installation at the
desired screened interval, which was identified based on field boron screening and
geophysical logs. Well materials were hung (suspended from a lift ring) to avoid casing
deflection while the wells were constructed. Due to the water -bearing zone encountered
at 466 feet bgs at GWA-3BRL, the screen was installed at the bottom of the borehole
(462-472 feet bgs).
Well design was determined based on a review of field data — including the boron
screening results, lithologic logs, and geophysical logs — after consultation with North
Carolina licensed geologists, the groundwater monitoring team, and Duke Energy.
Well screen intervals were selected based on the shallowest water -bearing fracture zone
that was identified at least 30 feet deeper than the existing bedrock well screen and
where boron concentrations, reported from the field screening process, were less than
700 µg/L. Each well was constructed of flush -joint threaded 2-inch inner diameter (I.D.)
schedule 40 PVC terminating with a 10-foot long 0.010-inch machine -slotted screen
packed with a No. 2 sand filter pack. The annular space between the borehole wall and
prepacked well screens for each of the wells was also filled with a No. 2 sand filter pack.
The sand pack extends 2-3 feet above the top of the prepacked screen at each well.
The well screen was isolated from shallower intervals with a seal that consists of a
minimum of 3 feet of coated pelletized bentonite placed atop the sand pack. In some
cases, an extensive column of bentonite plug was emplaced above the sand pack (up to
approximately 80 feet thick at GWA-3BRL) to mitigate risk of the artesian nature of the
borehole negatively affecting the well construction.
The remainder of the annular space was backfilled into the outer casing with
AquaGuard® via tremie pipe to reduce the risk of grout impacts to groundwater
quality. AquaGuard® was also used within the outer casing to fill the remaining
annular space to ground surface.
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Monitoring wells were completed with aboveground aluminum protective casings with
locking caps and well tags. The protective covers were secured and completed in a
concrete collar and a minimum 2-square-foot concrete pad with bollards (with the
exception of GWA-3BRL, GWA-4BRL, and GWA-5BRL). Due to the high traffic area on
the eastern portion of the ash basin dam, GWA-3BRL, GWA-4BRL, and GWA-5BRL
were completed with highway -grade flush mounted vaults. Well construction details
and lithologic logs are provided in Attachment A.
3.3 Well Development
The monitoring wells were developed via air -lifting techniques (i.e., air compressor and
tremie pipe). Development continued until water quality indicator parameters (e.g.,
conductivity, pH, temperature) were generally stable and turbidity was measured at
acceptable levels [10 nephelometric turbidity units (NTUs) or less]. Development
records provided in Attachment A include development method(s), water volume
removed, and field measurements of temperature, pH, conductivity, and turbidity.
3.4 Hydraulic Conductivity Measurements
Rising head slug tests, were completed at five of the six deep/lower bedrock wells.
Artesian conditions were encountered within the screened interval at GWA-3BRL,
which prevented slug tests from being conducted at this location. Slug tests were
performed in general accordance with American Society for Testing and Materials
(ASTM) D4044-96 Standard Test Method (Field Procedure) for Instantaneous Change in Head
(Slug) Tests for Determining Hydraulic Properties of Aquifers and North Carolina
Department of Environment and Natural Resources (NCDENR) Performance and
Analysis of Aquifer Slug Test and Pumping Test Policy, dated May 31, 2007.
3.5 Deep Bedrock Groundwater Sampling
After well installation, development, and slug testing, groundwater samples were
collected at the six deep/lower bedrock wells. Samples were analyzed for a suite of
chemistry parameters consistent with the [North Carolina Coal Ash Management Act
(CAMA) Interim Monitoring Plan (IMP) parameter list]. Samples were collected in
accordance with the Low Flow Sampling Plan for Duke Energy Facilities (Duke Energy,
June 2015) after water quality parameters stabilized. Analytical results for the deep
bedrock wells at Allen are presented in Table 1.
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4.0 BEDROCK FRACTURE EVALUATION METHODS
The deep bedrock fracture system at the Site was further evaluated using bedrock
borehole logging data to characterize the general depths of flow zones at borehole
locations (to target for monitoring well screen placement), hydraulic conductivity, the
hydraulic apertures of fractures and fracture spacing, and the in -situ orientations of
bedrock fractures. These evaluations provide a comprehensive assessment of the
bedrock fracture system in support of the CAP.
4.1 Flow Profile Characterization
FLASH (Flow -Log Analysis of Single Holes), a computer program developed by the
USGS, uses HPF data for ambient and pumping conditions to estimate transmissivity
profiles along single boreholes (Day -Lewis et al., 2011). FLASH software was used to
analyze the HPF data from the deep bedrock boreholes and generate a transmissivity
profile for each logged borehole. To produce a unique fit to the data, FLASH estimates
either transmissivity or radius of influence. All model iterations used an estimated
radius of influence of 1,000 feet. Calculated transmissivity results are relatively
insensitive to this parameter, but a conservatively large estimate was selected in order
to produce conservatively high estimates for transmissivity. The "objective function"
for the FLASH code incorporates the mean squared error between interpreted (from
borehole HPF data) and predicted flow profiles and the sum of squared differences
between the water level in the borehole and the far -field head. For each borehole, the
automated solver in FLASH computes until the objective function reached a minimum
value.
Total transmissivity for each borehole was also calculated using the Thiem Equation for
steady-state flow to a well in a confined aquifer (Thiem, 1906):
Q ! ro
T = 21c(s) In I ram, I
where T is transmissivity, Q is flow rate, s is drawdown, n is radius of influence, and rw
is the radius of the borehole. For boreholes with a Thiem calculated transmissivity that
was greater than the FLASH estimated total transmissivity, the transmissivity values for
borehole intervals from FLASH were scaled up proportionally to produce a total
FLASH transmissivity equal to the transmissivity value calculated for the entire
borehole.
Results from FLASH analysis of the HPF data from four boreholes are presented in
detail in Attachment B. One location, GWA-3BRL, exhibited artesian conditions,
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limiting HPF logging data to ambient conditions only (ambient flow was upward).
Therefore, no FLASH analysis was conducted for GWA-3BRL. Transmissivity values of
individual bedrock intervals, calculated using FLASH, were divided by interval vertical
length to calculate hydraulic conductivity values, which are illustrated versus depth
below top of bedrock on Figure 4. Calculated deep bedrock hydraulic conductivity
values based on FLASH analysis range from approximately 0.0001 feet per day to 10
feet per day. In general, bedrock hydraulic conductivity decreases with increasing
depth below the top of bedrock. The highest calculated hydraulic conductivity values
were from the upper portion of the borehole at AB-10BRL, which televiewer logging
indicated to be highly fractured (Attachment C); this well location is also near a
mapped lineament (Figure 1B).
For comparison with the data calculated using FLASH, Figure 4 also shows hydraulic
conductivity based on slug test results for the completed deep bedrock monitoring
wells. These data are fewer than the extensive FLASH -based dataset but also fit within
the overall data distribution based on FLASH analysis.
At GWA-3BRL artesian conditions hindered hydraulic conductivity estimation using
FLASH or slug testing. However, other data were available to estimate hydraulic
conductivity. After well installation, SynTerra installed a pressure gauge on the deep
bedrock well. When GWA-3BRL equilibrated to static conditions, SynTerra observed 16
pounds per square inch (PSI) of pressure at the well head, which is equivalent to
approximately 37 feet of water above the top of the well. Ambient HPF data indicated
upward flow from the bottom to the top of the borehole, so it is interpreted that the
artesian pressure represents the hydraulic head of the water -bearing zone at 466 bgs
that was observed during drilling. The increase in water production during drilling at
466 feet bgs was approximately 5 gpm, with under flowing artesian conditions. Under
flowing artesian conditions, the water level was 37 feet below the static level. Using a
drawdown value of 37 feet and pumping rate of 5 gpm, the Thiem equation was used to
estimate transmissivity. The resulting hydraulic conductivity estimate for the screened
interval of well GWA-3BRL, which includes the water -bearing zone, is 3 feet per day
(Figure 4).
In general, hydraulic conductivity values decrease with increasing depth within the
bedrock. Most of the deep bedrock borehole intervals did not indicate any notable
transmissivity (or hydraulic conductivity) based on HPF data; therefore, they are not
included in this analysis. In addition, monitoring wells were installed at depths
interpreted to have the most significant water -bearing fractures. Therefore, the overall
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hydraulic conductivity of the bedrock fracture system is lower than suggested by the
data shown on Figure 4.
4.2 Fracture Hydraulic Apertures
Transmissivity data generated by FLASH were also used to estimate the average
hydraulic aperture (en) for individual bedrock intervals using the local cubic law (Steele,
2006):
12Tµ
eh =
P,N9n
where T is transmissivity, µ is the viscosity of water, pw is the density of water, g is the
acceleration due to gravity, and n is the number of individual fractures in the flow
layer. Bedrock fractures are rough, so fracture widths (apertures) vary at different
points within the fracture. The hydraulic aperture is the width of an idealized parallel -
plate opening with the same transmissivity as an actual, rough -walled fracture, and it is
approximated by the geometric mean of the individual aperture values within the
fracture (Keller, 1998).
Average hydraulic apertures were estimated for each deep bedrock borehole interval
with a transmissivity greater than zero. The number of fractures in each zone was
determined from the fracture summary table provided in the geophysical evaluation
report by GEL Geophysics, LLC (GEL) (Attachment Q. Only "open major" and "open
minor" fractures identified by GEL were included in the fracture count for each zone;
"closed" fractures were excluded. For layers without any identified open fractures but
with measurable transmissivity, it is assumed that one fracture was present.
Based on HPF data and FLASH analysis, mean hydraulic apertures of bedrock fractures
at the Site generally range from approximately 0.01 millimeters (mm) to 0.40 mm (10
µm to 400 µm) (Figure 5). The highest calculated hydraulic aperture values were from
the upper portion of the borehole at AB-10BRL, which televiewer logging indicated to
be highly fractured (Attachment C); this well location is also near a mapped lineament
(Figure 1B).
The average hydraulic aperture for the fractures within the water -bearing zone at 466
BGS at borehole GWA-3BRL was calculated to be 0.2 mm, or 200 µm (Figure 5).
For comparison, Figure 5 shows fracture apertures based on slug test results and
fracture logging data for the completed deep bedrock monitoring wells. These data are
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fewer than the extensive FLASH -based dataset but fit within the overall data
distribution based on FLASH analysis
In general, hydraulic apertures decrease with increasing depth within the bedrock. As
noted above, many of the bedrock borehole intervals logged using HPF did not indicate
any significant contribution to flow within the borehole. Most of these intervals had
interpreted open fractures, but indicated negligible (approximately zero) transmissivity,
and therefore were not used in fracture aperture calculations. Those depth intervals
have hydraulic apertures near zero. This fracture aperture evaluation represents only
the most transmissive fractures within each logged bedrock borehole. Therefore, the
overall apertures within the bedrock fracture system are lower than suggested by the
data shown on Figure 5.
4.3 Fracture Spacing
Fracture spacing for each borehole interval was calculated by dividing the length of the
interval by the number of open fractures identified in that interval. For intervals that
did not have any identified open fractures and had an estimated transmissivity of zero,
it was assumed that there were no fractures in that interval; therefore, no fracture
spacing was calculated for that interval.
Televiewer logging results (discussed below) from the combined dataset indicated
approximately 147 open fractures identified by GEL in 1,746 vertical feet of logging at
the five logged bedrock boreholes, which indicates an overall average spacing of 11.9
feet (vertical separation) between interpreted open fractures. However, the frequency of
dipping bedrock fractures is greater than that indicated from vertical borehole data
(Morin et al., 1997). Within the investigated depth intervals, the bedrock at the Site
shows variable degrees of fracturing (Attachment C). Televiewer logs at AB-10BRL and
GWA-5BRL showed interpreted open fractures throughout most of their logged depth
intervals; both of those wells are near mapped lineaments (Figure 113). In contrast,
televiewer logs for GWA-3BRL and GWA-4BRL showed no interpreted open fractures
between approximate depths of 250 feet and 450 feet. Where present, fractures of
various cross -cutting orientations were identified, suggesting that fractures intersect
one another and produce an overall, interconnected fracture network.
Figure 6 shows the mean vertical spacing of open fractures in bedrock intervals
identified as relatively transmissive based on HPF logging; these intervals were
evaluated using FLASH software to calculate hydraulic apertures shown on Figure 5.
Fracture spacings within these more transmissive bedrock intervals are smaller than the
overall average for the bedrock. These data suggest that fracture spacing within
transmissive bedrock intervals is relatively consistent with depth below the top of rock.
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However, the upper portion of borehole AB-10BRL shows closely spaced fractures,
consistent with the relatively high hydraulic conductivity values noted above.
4.4 Fracture Orientation Plots and Statistics
In -situ bedrock fracture data measured at five deep/lower bedrock boreholes by GEL
using a combination of optical and acoustic televiewer are summarized as bedrock
fracture tables, stereonet plots, and rose diagrams of fracture orientation statistics in
Attachment C. GEL classified each identified fracture as either "closed," "minor open,"
or "major open" based on flow logging or other evidence. The two "open" classes were
evaluated in terms of orientation; "closed" fracture orientations were compared
qualitatively.
Bedrock fracture orientations logged at each deep bedrock borehole indicate a wide
range of fracture orientations with no predominant, consistent fracture sets. The
absence of a Site -wide preferential fracture orientation is illustrated on the "All Wells"
stereonets provided in Attachment C.
General observations for the fractures GEL characterized as open at the five logged
boreholes are as follows:
• AB-10BRL: Scattered fracture orientations with a wide range of dip magnitudes
and directions; the upper portion of the borehole (approximately 50 feet to 100
feet) is highly fractured; this well location is near a mapped lineament (Figure
1B).
• GWA-3BRL: Relatively few fractures with wide range of orientations, but most
dip west or southwest with a range of dip magnitudes; no interpreted open
fractures between approximate depths of 250 feet and 450 feet.
• GWA-4BRL: No significant trend; wide range of dip magnitudes and
orientations; no interpreted open fractures between approximate depths of 250
feet and 450 feet.
• GWA-5BRL: No significant trend; fractures mostly dip gently with a wide range
of orientations, and with steeper cross -cutting fractures also with a wide range of
orientations.
• GWA-6BRL: Predominant fractures strike west-southwest to east-northeast, with
a gentle to moderate dip to the south-southeast and steep secondary cross-
cutting fractures that strike north-northwest and south-southeast.
Page 4-5

Fractured Bedrock Evaluation December 2019
Duke Energy Carolinas, LLC — Allen Steam Station SynTerra
Overall, the fracture data indicate a wide range of dip angles and dip directions. The
cross sections presented on Figures 7 to 11 illustrate at a conceptual level the absence of
any predominant fracture set. The relative lengths of fractures shown on the cross
sections decrease with depth to illustrate, at a conceptual level, that the degree of
overall fracturing decreases with depth. However, the lengths and spacings of fractures
are conceptual and qualitative. As noted above, the overall average vertical spacing
between open fractures is approximately 18.7 feet; therefore, fractures at the Site are too
numerous to illustrate on the cross sections. In -situ fracture lengths are impractical to
measure, but Gale (1982) suggested that typical fracture lengths may be on the order of
3 to 4 times the fracture spacing.
4.5 Summary of Bedrock Fracture Characteristics
Overall, the bedrock hydraulic conductivity near the ash basins and coal pile decreases
with increasing depth below the top of rock. This finding is consistent with the
literature. Gale (1982) showed that bedrock well yield and fracture permeability
decrease systematically as a function of depth. Neretnieks (1985) also showed a
systematic decline in bulk bedrock hydraulic conductivity with increasing depth.
Fracture spacing in the logged intervals of the bedrock are relatively consistent with
depth below the top of rock. This finding is consistent with data reported for a variety
of rock types by Snow (1968).
Overall, calculated fracture apertures decrease with increasing depth in the deep
bedrock. This finding is also consistent with information reported in the literature.
Snow (1968) published fracture aperture as a function of depth for several rock types,
including crystalline rocks such as granite, gneiss, and schist, and concluded that
fracture apertures generally decrease with increasing depth. With increasing depth, the
weight of the overlying rock increases. This increases the effective stress and causes the
fracture walls to deform and flatten, reducing fracture apertures with increasing depth.
The available data do not indicate any predominant interconnected bedrock fracture
sets near the ash basins and coal pile at Allen. Overall, a wide range of open fracture
dip angles and dip directions is observed.
4.6 Implications of Bedrock Fracture Network for Groundwater
Flow
Based on the orientations of lineaments and open bedrock fractures near the ash basins
and coal pile at Allen, horizontal groundwater flow within the bedrock should occur
approximately parallel to the hydraulic gradient, with no preferential flow direction
(i.e., no expected, significant anisotropy). The lineaments are approximately east -west,
Page 4-6

Fractured Bedrock Evaluation
December 2019
Duke Energy Carolinas, LLC — Allen Steam Station
SynTerra
approximately parallel to the prevailing eastward horizontal hydraulic gradient toward
Lake Wylie. The absence of any significant, predominant oblique fracture set indicates
that the general orientations of groundwater flow should be in the downgradient
direction, toward Lake Wylie. Consistent with this interpretation, the current
groundwater flow model for Allen does not simulate plan -view anisotropy.
The observed decline in bedrock hydraulic conductivity and hydraulic aperture with
increasing depth is consistent with expectations based on the literature and indicates
that the overall volumetric rate of groundwater flow in the bedrock decreases with
depth.
Page 4-7

Fractured Bedrock Evaluation December 2019
Duke Energy Carolinas, LLC — Allen Steam Station SynTerra
5.0 BEDROCK MATRIX CHARACTERISTICS
Core Laboratories (Core Labs) analyzed bedrock rock core samples for porosity, bulk
density, and thin section petrography. Data provided by Core Labs can be used to
evaluate the potential influence of matrix diffusion and sorption on constituent fate and
transport within the fractured bedrock system at Allen.
5.1 Sample Selection
Rock core samples were selected from three bedrock locations, AB-22, GWA-5, and
GWA-6, which represent areas of affected groundwater migration, east and northeast of
the ash basin (Figure 3). Samples were chosen from discrete options of rock core with
the most notable weathering of fracture surfaces, as these are interpreted to coincide
with zones of preferential groundwater flow. Sample locations and depth intervals
were:
• AB-22BR:
o 174.5 feet bgs
o 204 feet bgs
• AB-22BRL:
o 246 feet bgs
• GWA-5BR:
o 135 feet bgs
o 161.5 feet bgs
• GWA-6BR:
o 138 feet bgs
o 190 feet bgs
5.2 Matrix Porosity and Bulk Density
Core Laboratories prepared samples by pulling 1-inch-diameter plugs drilled into the
rock core and trimming into right cylinders with a diamond -blade trim saw. Samples
were then cleaned by Soxhlet extraction and oven -dried at 240' F to weight equilibrium
(+/- 0.001 g).
Rock core samples were analyzed for porosity using Boyle's Law technique by
measuring grain volume and pore volume at ambient conditions. Grain density values
Page 5-1

Fractured Bedrock Evaluation December 2019
Duke Energy Carolinas, LLC — Allen Steam Station
SynTerra
were calculated by direct measurement of grain volume and weight on the dried plug
samples. Grain volume was measured by Boyle's Law technique.
Results from the matrix porosity and bulk density analysis are presented in Table 2.
The reported matrix porosity values ranged from 0.49 percent to 5.16 percent, with an
average of 1.88 percent. Bulk density ranged from 2.653 to 2.951 grams per cubic
centimeter, with an average of 2.784 grams per cubic centimeter.
5.3 Petrographic Evaluation
Thin sections were prepared by impregnating the samples with epoxy to augment
cohesion and to prevent loss of material during grinding. Each thinly sliced sample
was mounted on a slide and ground to an approximate thickness of 30 microns. Thin
sections were stained to aid in mineral identification and analyzed using standard
petrographic techniques. The thin section petrographic evaluation results are presented
in Attachment D.
Core Labs classified all seven samples as igneous rocks. Five samples are intrusive
(plutonic) and two are extrusive (volcanic). The plutonic igneous rocks are classified as
quartz diorite and tonalite. The volcanic igneous rocks are classified as hornblende
andesite. The principal minerals are plagioclase, quartz, biotite, and amphibole.
Accessory minerals include K-feldspar, epidote, pyrite, magnetite, apatite, and sphene.
Many plagioclase crystals have been altered into sericite/illitic clays. Biotite and
amphibole crystals are locally altered into chlorite.
5.4 Implications of Bedrock Matrix Characteristics for Flow and
Transport
The reported matrix porosity values are within the range of those reported for
crystalline rocks in the literature (Freeze and Cherry, 1979; L6fgren, 2004; Zhou et al.,
2008; Ademeso et al., 2012). The presence of measurable matrix porosity suggests that
matrix diffusion contributes to plume retardation at the Site (Lipson et al., 2005). In
addition, the identification of sericite (a mixture of muscovite, illite, or paragonite
produced by hydrothermal alteration of feldspars) in all of the samples indicates the
bedrock has the capacity to sorb boron and other elements associated with coal ash. The
influences of matrix diffusion and sorption are implicitly included in the groundwater
flow and transport model as a component of the constituent partition coefficient (Ka)
term used for the bedrock layers.
Page 5-2

Fractured Bedrock Evaluation December 2019
Duke Energy Carolinas, LLC — Allen Steam Station SynTerra
6.0 REFERENCES
Ademeso, O.A., J.A. Adekoya and B.M. Olaleye. 2012. The Inter -relationship of Bulk
Density and Porosity of Some Crystalline Basement Complex Rocks: A Case
Study of Some Rock Types In Southwestern Nigeria. Journal of Engineering, Vol.
2, No. 4, pp. 555-562.
Clark, S.F., Moore, R.B., Ferguson, E.W., Picard, M.Z. 2016. "Criteria and Methods for
Fracture Trace Analysis of the New Hampshire Bedrock Aquifer." U.S.
Geological Survey Open File Report 96-479.
Day -Lewis, F.D., C.D. Johnson, F.L. Paillet, and K.J. Halford. 2011. FLASH: A Computer
Program for Flow -Log Analysis of Single Holes. Computer software. Version 1.0.
U.S. Geological Survey.
Duke Energy. 2015. Low Flow Sampling Plan, Duke Energy Facilities, Ash Basin
Groundwater Assessment Program, North Carolina.
Freeze, R.A. and J.A. Cherry. 1979. Groundwater. Prentice -Hall, Inc. Englewood Cliffs,
New Jersey. 604 p.
Gale, J.E. 1982. Assessing the permeability characteristics of fractured rock. Geological
Society of America Special paper 189.
Keller, A. 1998. High -resolution, non-destructive measurement and characterization of
fracture apertures. Int. J. Rock Mech. Min. Sci., 35(8), pp. 1037-1050.
Lipson, D.S, B.H. Kueper and M.J. Gefell. 2005. Matrix diffusion -derived plume
attenuation in fractured bedrock. Ground Water, Vol. 43, No. 1, pp. 30-39.
L6fgren, M. 2004. Diffusive properties of granitic rock as measured by in -situ electrical
methods. Doctoral Thesis, Department of Chemical Engineering and Technology
Royal Institute of Technology, Stockholm, Sweden.
Morin, R.H., G.B. Carleton, and S. Poirier. 1997. Fractured -Aquifer Hydrogeology from
Geophysical Logs; The Passaic Formation, New Jersey. Ground Water, 35(2), 328-
338.
Neretnieks, I. 1985. Transport in fractured rocks. Hydrology of Rocks of Low
Permeability. Memoirs. International Association of Hydrogeologists, v. XVII,
part 1 of 2, pp. 301-318.
Page 6-1

Fractured Bedrock Evaluation
December 2019
Duke Energy Carolinas, LLC — Allen Steam Station
SynTerra
Snow, D.T. 1968. Rock fracture spacings, openings, and porosities." J. Soil Mech. Found.
Div., Proc. Amer. Soc. Civil Engrs., v. 94, pp. 73-91.
Steele, A., D.A. Reynolds, B.H. Kueper, and D.N. Lerner. 2006. "Field determination of
mechanical aperture, entry pressure and relative permeability of fractures using
NAPL injection." Geotechnique 56, no. 1, pp. 27-38.
SynTerra. 2018. Comprehensive Site Assessment Update — Allen Steam Station —
January 2018. Terrell, NC.
Thiem, G. 1906. Hydrologische methoden. Leipzig: Gebhardt.
Zhou, Q., H.H. Liu and F.J. Molz. 2008. Field -scale effective matrix diffusion coefficient
for fractured rock: results from literature survey. Lawrence Berkeley National
Laboratory. https:Hescholarship.org/uc/item/3dw5c7ff.
Page 6-2

Fractured Bedrock Evaluation
December 2019
Duke Energy Carolinas, LLC — Allen Steam Station
FIGURES
SynTerra

\_
In
o \ ant
ti
i ALLEN STEAM
■ f STATION PARCEL LINE 1 L
j •, / j _ ( FUTURE ALLEN
STEAM STATION i I
I
�7''
�- ,T\ _ - -
r
i�'
• RETIRED ASH BASIN �I
o`�'so ,
\ �\ WASTE BOUNDARY (APPROXIMATE)
oil
�� � / \ • / ACTIVE ASH BASIN f
■
I
Lbwert 4r
SHORELINE OF LAKE WYLIE O�
Bridge (CATAWBA RIVER)
,.
S9 9USGS TOPOGRAPHIC MAP (CLOVER. SC) -NC OBTAINED FROM THE USGS STORE AT
http://store.usgs.gov/b2c_usgs/b2c/start/%%%28xcm=r3standardpitrex_prd%%%29/.do
DUKE GRAPHIC SCALE
l000 0 l000 z000 FIGURE 1A
40) ENERGY IN FEET 1949 USGS TOPOGRAPHIC MAP WITHOUT
CAROLINAS DRAWN BY:J.CHASTAIN DATE:12/18/2019 LINEAMENTS
REVISED CHECKED
DATE:- FRACTURED BEDROCK EVALUATION
APPROVCHECKED BY: L., DRAO DATE:12/18/2019
PROJECT
MANAD BYGER:
R:C.S DATE.12/18/2019 ALLEN STEAM STATION
PROJECT MANAGER: C. SUTTELL
synTerra r www.synterracorp.com
BELMONT, NORTH CAROLINA

LINEAMENT ORIENTATION SUMMARY
C
✓� G`� ��'\ /� RANGE OF PREDOMINANT ORIENTATIONS
_ Q' /.
0.
.�y int
�w 270° 268° 88' 90•
�o
lb
Sant L\ALLEN STEAM r~�
STATION PARCEL LINE
l - _
• ) I 180,
1 RANGE OF PREDOMINANT ORIENTATIONS
q J W
01
r ��• /�" _ J FUTURE ALLEN O
- STEAM STATION t
_
• �.
RETIRED ASH BASIN �I
\� \ WASTE BOUNDARY (APPROXIMATE)
667
�.
�� J � i • / ACTIVE ASH BASIN , IM
~_1
werl 1t r .SHORELINE OF LAKE WYLIE J
T (CATAWBA RIVER)
Bridge ,� S _� �,`y 0,10
p
SOURCE:
1949 USGS TOPOGRAPHIC MAP (CLOVER, SC) -NC OBTAINED FROM THE USGS STORE AT - - I
htt store.us s. ov b2c us s b2c sta %%%28xcm=r8standard itrex rd%%%29 .do %
DUKE GRAPHIC SCALE
l000 0 1000 2000 FIGURE 1 B
446� ENERGY IN FEET 1949 USGS TOPOGRAPHIC MAP WITH
CAROLINAS DRAWN BY:J.CHASTAIN DATE:12/18/2019 LINEAMENTS
REVISEED Y: DATE:- FRACTURED BEDROCK EVALUATION
CHECKED BB:L. :T. DRAO DATE:12/18/2019
APPROVED BY: L. R: L. D DATE:12/18/2019 ALLEN STEAM STATION
PROJECT MANAGER: L. DRAGO
synTelra www.synterracorp.com
BELMONT, NORTH CAROLINA

v
6+
ALLEN STEAM
STATION PARCEL LINE �� \
_ - FUTURE ALLEN
STEAM STATION
Mir1 `
RETIRED ASH BASIN
WASTE BOUNDARY (APPROXIMATE) I
i
/ ACTIVE ASH BASIN
l/ \
` r
SHORELINE OF LAKE WYLIE
(CATAWBA RIVER)
SOURCE:
MAY 14, 1948 AERIAL PHOTOGRAPH OBTAINED FROM THE USGS EARTH EXPLORER WEB SITEAT
http://earthexplorer.usgs.gov/
DUKE GRAPHIC SCALE
loon 0 l000 z000 FIGURE 2A
46� ENERGY IN FEET 1948 AERIAL PHOTOGRAPH WITHOUT
CAROLINAS DRAWN BY: J. CHASTAIN DATE:12/18/2019 LINEAMENTS
REVISED BY: DATE: -
1 CHECKED BY: L. DRAGO DATE:12/18/2019 FRACTURED BEDROCK EVALUATION
APPROVED
MANAGER: DRAGO DATE:12/18/2019
PROJECT MANAG ALLEN STEAM STATION
synTeYl'd www.synterracorp.com
BELMONT, NORTH CAROLINA

i
DUKE
ENERGY
CAROLINAS
161P
synTeaa
L, f•
ALLEN STEAM
STATION PARCEL LINE
I
LINEAMENT ORIENTATION SUMMARY
RANGE OF PREDOMINANT ORIENTATIONS
oo
V
270
90°
180,
SOURCE:
MARCH 22, 1951 AERIAL PHOTOGRAPH OBTAINED FROM THE USGS EARTH EXPLORER
WEB SITE AT http://earthexplorer.usgs.gov/
1
^
� RETIRED ASH BASIN I
WASTE BOUNDARY (APPROXIMATE)
� I
�I J� ACTIVE ASH BASIN h\
r
SHORELINE OF LAKE WYLIE /—
(CATAWBA RIVER)
GRAPHIC SCALE
1000 0 1000 2000
IN FEET
DRAWN BY: J. CHASTAIN DATE: 1
REVISED BY: DATE: -
CHECKED BY: L. DRAGO DATE: 1
APPROVED BY: L. DRAGO DATE: 1
PROJECT MANAGER: L. DRAGO
www.synterracorp.com
FIGURE 2B
1948 AERIAL PHOTOGRAPH WITH LINEAMENTS
FRACTURED BEDROCK EVALUATION
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA

t.
1'
~ pRMStROpG R
p0
-
N
LEGEND
ODEEP BEDROCK EVALUATION LOCATION
OROCK CORE SAMPLE LOCATION
—� ACTIVE ASH BASIN WASTE
- - RETIRED ASH BASIN WASTE
- ASH BASIN COMPLIANCE BOUNDARY
_ RETIRED ASH BASIN ASH LANDFILL WASTE
BOUNDARY
RETIRED ASH BASIN ASH LANDFILL COMPLIANCE
BOUNDARY
DORS FILLS BOUNDARIES
SITE FEATURE
DUKE ENERGY CAROLINAS PROPERTY LINE
)II, STREAM (AMEC NRTR 2015)
® WETLAND (AMEC NRTR 2015)
NOTES:
1. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS,
LLC.
2. ALL BOUNDARIES ARE APPROXIMATE.
3. AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON
DECEMBER 13, 2018. AERIAL WAS COLLECTED ON MARCH 30, 2018.
4. NATURAL RESOURCES TECHNICAL REPORT (NRTR) PREPARED BY
AMEC FOSTER WHEELER, INC., MAY 29, 2015.
5. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA
STATE PLANE COORDINATE SYSTEM FIPS 3200 (NAD83).
6. `DENOTES ABANDONED MONITORING WELLS.
I" -.
f
1 t
.I I
375 0 375 750
DUKE
ENERGY GRAPHIC SCALE IN FEET
CAROLINAS
DRAWN BY: K. KING DATE: 05/07/2019
REVISED BY: C. WYATT DATE: 12/14/2019
APPROVED BY: L. DRAGO DATE: 12/14/2019
CHECKED BY: L. DRAGO DATE: 12/14/2019
T PROGRAM MANAGER: C. SUTTELL
RETIRED ASH BASIN
ASH LANDFILL
C GWA-46RL
C GWA-3BRL
CAB-10BR
AB-10BRL
FIGURE 3
DEEP BEDROCK EVALUATION LOCATIONS
FRACTURED BEDROCK EVALUATION
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA

100
10
1
= 0.01
0.001
0.0001 -L 1
0 50 100 150 200 250 300 350 400
Depth (Feet Below Top of Rock)
NOTES•DUKE DRAWN BY: P.ALTMAN DATE:10/23/2019
1. FLASH hydraulic conductivity values calculated from FLASH ENERGY REVISED BY:
.
estimated transmissivity values. CHECKED BY:
2. SLUG hydraulic conductivity values estimated from slug CAROLINAS APPROVED BY:
test data. PROJECT MANAGER: C. SUTTELL
3. Hydraulic conductivity for GWA-313RL was calculated with
Thiem Equation calculated transmissivity using flow and tip
hydraulic head data measured during drilling and well synTem www.synterracorp.com
installation activities.
9AB-10BRL FLASH
OAB-10BRL SLUG
♦ GWA-3BRL
0GWA-413RL FLASH
OGWA-413RL SLUG
•GWA-5BRL FLASH
OGWA-513RL SLUG
GWA-6BRL FLASH
GWA-6BRL SLUG
450
FIGURE 4
HYDRAULIC CONDUCTIVITY
VERTICAL PROFILE
FRACTURED BEDROCK EVALUATION
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA

0.45
0.40
0.30
E
E
aj 0.25
v
a
a
0.20
T
2
0.15
0.10
0.05
50 100 150 200 250 300 350 400
Depth (Feet Below Top of Rock)
NOTES:
1. FLASH hydraulic aperture values calculated from FLASH
estimated transmissivity values.
2. SLUG hydraulic aperture values estimated from slug test
data.
3. Hydraulic aperture for GWA-3BRL was calculated with
Thiem Equation calculated transmissivity using flow and
hydraulic head data measured during drilling and well
& DUKE
ENERGY.:
CAROLINAS
t'
synTem
DRAWN BY: P. ALTMAN DATE: 10/23/2019
REVISED BY:
CHECKED BY:
APPROVED BY:
PROJECT MANAGER: C. SUTTELL
www.synterracorp.com
• A13-106131- FLASH
OAB-10BRL SLUG
♦ GWA-3BRL
• GWA-46RL FLASH
OGWA-46RL SLUG
• GWA-56RL FLASH
OGWA-56RL SLUG
GWA-66RL FLASH
GWA-66RL SLUG
450
FIGURE 5
HYDRAULIC APERTURE
VERTICAL PROFILE
FRACTURED BEDROCK EVALUATION
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA

25.0
20.0
v
15.0
v
LL
ao
c
U
M
a
V)
v
L
V
M
L 10.0
5.0
re,
0 50 100 150 200 250 300 350 400 450
Depth (Feet Below Top of Rock)
*AB-10BRL
GWA-36RL
• GWA-46RL
• GWA-5BRL
GWA-66RL
NOTES:
DRAWN BY: P. ALTMAN DATE: 10/23/2019
1. Fracture spacing data shown above are specific to relatively
`� DUKE
transmissive bedrock intervals identified based on HPF logging
ENERGY.:
REVISED BY:
FIGURE 6
and FLASH analysis.
HECKED BY:
APPROVEDB
FRACTURE SPACING
2. Fracture spacing calculated by dividing the length of the
CAROLIPIAS
APPROVED
VERTICAL PROFILE
interval by the number of open fractures identified in that
PROJECT MANAGER: C. SUTTELL
FRACTURED BEDROCK EVALUATION
interval.
tipALLEN
STEAM STATION
3. Fracture spacing for GWA-36RL was calculated only based on
HPF logging. No FLASH analysis was conducted for GWA-36RL
synTerra
BELMONT, NORTH CAROLINA
because of artesian conditions.
www.synterracorp.com

A
(NORTH) LIVE COAL
PILE —
600 rn .7
v cai tai ca.1 ca.> v
L —
— 8.8j, S1
55 <50 568.22' 1
568.61' 512
COMPLIANCE BOUNDARY
C
K�
mO ql uj In
aaa 3 3
an
3
n
3
-
c�
0 U
0 c�c�
1520 18.8j, S1
604 578.49'
317
1700
1380 I
—
572.80' 573.4�
SAPROLITE
65
2080
573.23'
571.76'
572.65'
S77.90'
36.1j, S�
1700
568.33'
'
SAPROLITE
50
1766
572.98'
45 732 /
BEDROC\�`/\\ 350 \\ \/
;\\/�I/1 �'/\I/1\' \/\I/1\' �/ \/\I/1\ T�
w
w
,
150/\I/1�'/\I/1"\/\I/1�'\/\�/1"\/\I/1�'\/
10
4816 1470
609 574.51' 586.E 30.9j, S1
573.33'
TRANSITION ZONE
_ _ _ 568.27'
1L/s\/\
—
/-1
I/1\, \/il/1♦ /—/\I/1"\/il/1\/—/\I/1"
\/\'/1` /—
\,/1♦ /\/\'/\` /—/\I/1" \/\'/1`•
/\ I / 1
N
\ / \I / 1 \ /� I
N
�'
/'
I\ /` II\/\II
N N
CANAL ROAD
LEGEND
ALLEN
SSTM
TATION
GWA-22S WELL IN FILL/ALLUVIUM/SAPROLITE
SHALLOW ZONE FLOW LAYER GROUNDWATER
GWA-22D WELL IN TRANSITION ZONE
WELL WATER LEVEL ELEVATION
PLANTAL N RD.
GWA-21BR WELL IN BEDROCK
DEEP ZONE FLOW LAYER GROUNDWATER
WELL WATER LEVEL ELEVATION
RETIRED
AB-35S WELL IN ASH PORE WATER
ASH BASIN
(ASH STORAGE/
ABANDONED WELL/ GEOTECHNICAL
CCR-11D
V
BEDROCK FLOW LAYER GROUNDWATER
WELL WATER LEVEL ELEVATION
STRUCTURAL FILL)
RETIRED
BORING
ASH BASIN
ASH LANDFILL
GENERALIZED WATER TABLE
WELL SCREEN
0 ALLUVIUM
BORON CONCENTRATION (ug/L)
CATAWBA
® FILL
WATER LEVEL ELEVATION (NAVD 88)
RIVER
(LABEL COLORING BY FLOW ZONE)
(LAKE WYLIE)
0 SAPROLITE
_ _ _
COMPLIANCE BOUNDARY
P G�OPO
CAON $
® TRANSITION ZONE
P ACTIVE
ASH BASIN
;:�i•,—,; ' BEDROCK
BEDROCK FRACTURE ORIENTATION
PREDOMINANT BEDROCK
D
FRACTURE ORIENTATION
NOTE:
CROSS SECTION A -A' IS LINEAR IN NATURE AND ALL
LOCATIONS NOT ALONG THE CROSS SECTION ARE
PROJECTED ONTO THE CROSS SECTION.
CROSS SECTION LOCATION
NOTES
<50 ALLUVIUM
572.87'
<50
573.97'
21.4j, S1 SAPROLITE
572.05'
_ A'
(SOUTH)
<50
'BEDROCK I
150
00
Z
O
Q
j
J
w
1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON MARCH 13, 2019, REFERENCED TO NORTH AMERICAN VERTICAL DATUM (NAVD) OF 1988.
2. GROUNDWATER FLOW IS APPROXIMATELY WEST TO EAST, PERPENDICULAR TO THE CROSS SECTION.
3. FRACTURES DEPICTED ON THIS CROSS SECTION REPRESENTS THE GENERALIZED FRACTURE ORIENTATIONS BASED ON TELEVIEWER LOGGING AT
SITE SPECIFIC BOREHOLES. AS CONCEPTUALLY ILLUSTRATED HERE, TELEVIEWER LOGGING RESULTS DID NOT INDICATE ANY DISTINCT,
CONSISTENT FRACTURE SETS, BUT A WIDE VARIETY OF FRACTURE ORIENTATIONS AT THE SITE. THE ACTUAL NUMBER OF FRACTURES IS FAR TOO
NUMEROUS TO ILLUSTRATE AT THIS SCALE. IN ADDITION, THE DEPTH AND LENGTH OF FRACTURES VERSUS DEPTH ARE CONCEPTUAL ONLY.
4. ALL BOUNDARIES ARE APPROXIMATE.
5. CROSS SECTION REPRESENTATIVE OF PRE -DECANTING CONDITIONS.
6. BORON CONCENTRATIONS SHOWN ARE THE MOST RECENT VALUES AS OF JUNE 2019.
V
DUKE
ENERGY
CAROLINAS
1410
synTena
GRAPHIC SCALE
0 112 225 450
HORIZONTAL SCALE: 1" = 450'
VERTICAL SCALE: 1" = 90'
5X VERTICAL EXAGGERATION
DRAWN BY: C. NEWELL DATE: 9/13/2019
REVISED BY: D. KRESKI DATE: 12/6/2019
CHECKED BY: L. DRAGO DATE: 12/6/2019
APPROVED BY: C.SUTTELL DATE:12/6/2019
PROJECT MANAGER: C. SUTTELL
LAYOUT: XSECT_AA (FIG-7)
www.synterracorp.com
FIGURE 7
GENERAL CROSS SECTION A -A'
FRACTURED BEDROCK EVALUATION
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA

150
100
B-
(WEST)
COMPLIANCE BOUNDARY
STRUCTURAL STRUCTURAL
FILL FILL
to O I
0 o I
M
COAL PILE
- B'
(EAST)
lei
i1. /\I , �\/\lil". /\I ,\/\li1\ �. ,.� ,� �\/\l i1. /\I , \ /\lil". /\I ,\/\lil\ �. ,.� ,� \/\lit". /\I ,\ /\lit". ,.� ,� \/\lil. ,.� ,� �\/\l i1". /\I ,�� \ /\li1\'. ,.� ,� �\/\l il`•
LEGEND
GWA 22S WELL IN FILL/ALLUVIUM/SAPROLITE
GWA-22D WELL IN TRANSITION ZONE
GWA-21BR WELL IN BEDROCK
AB-35S WELL IN ASH PORE WATER
L GENERALIZED WATER TABLE
RETIRED
mmm..1j, GENERALIZED GROUNDWATER
ASH BASIN
FLOW DIRECTION
1SH LANDFILL
�� GENERALIZED ASH PORE WATER
FLOW DIRECTION
CATAWBA
RIVER
ASH
(LAKE WYLIE)
ASH PORE WATER
krTIVE
SAPROLITE
H BASIN
TRANSITION ZONE
BEDROCK
NOTE:
SURFACE WATER
CROSS LOCATIONS NION B-B'IS LINEAR IN NATURE AND OTALONG THE CROSSS SECTION ARE
PREDOMINANT BEDROCK
PROJECTED ONTO THE CROSS SECTION.
FRACTURE ORIENTATION
CROSS SECTION LOCATION
200
150
100
NOTES
ASH PORE WATER FLOW LAYER
1.
DEPTH TO WATER GAUGED IN MONITORING WELLS ON MARCH 13, 2019, AND OCTOBER 24, 2019 (AB-41SS, AB-41D, AB-44AP, AB-44SS, AB-44D,
WATER LEVEL ELEVATION
GWA-285, GWA-28D, GWA-28BR, GWA-295, GWA-29D, GWA-29BR, GWA-305, GWA-30D) REFERENCED TO NORTH AMERICAN VERTICAL DATUM
(NAVD) OF 1988.
SHALLOW ZONE FLOW LAYER GROUNDWATER
2.
FRACTURES DEPICTED ON THIS CROSS SECTION REPRESENTS THE GENERALIZED FRACTURE ORIENTATIONS BASED ON TELEVIEWER LOGGING AT
WELL WATER LEVEL ELEVATION
SITE SPECIFIC BOREHOLES. AS CONCEPTUALLY ILLUSTRATED HERE, TELEVIEWER LOGGING RESULTS DID NOT INDICATE ANY DISTINCT,
DEEP ZONE FLOW LAYER GROUNDWATER
CONSISTENT FRACTURE SETS, BUT A WIDE VARIETY OF FRACTURE ORIENTATIONS AT THE SITE. THE ACTUAL NUMBER OF FRACTURES IS FAR T00
WELL WATER LEVEL ELEVATION
NUMEROUS TO ILLUSTRATE AT THIS SCALE. IN ADDITION, THE DEPTH AND LENGTH OF FRACTURES VERSUS DEPTH ARE CONCEPTUAL ONLY.
3.
ALL BOUNDARIES ARE APPROXIMATE.
BEDROCK FLOW LAYER GROUNDWATER
WELL WATER LEVEL ELEVATION
4.
CROSS SECTION REPRESENTATIVE OF PRE -DECANTING CONDITIONS.
BORON CONCENTRATION (ug/L)
5. BORON
CONCENTRATIONS SHOWN ARE THE MOST RECENT VALUES
AS OF JUNE 2019.
WATER LEVEL ELEVATION (NAVD 88)
GRAPHIC SCALE
0 100 200 400'
(LABEL COLORING BY FLOW ZONE)
DUKE
WELL SCREEN
4n ENERGY
HORIZONTAL SCALE: 1" = 400'
VERTICAL SCALE: 1"=80'
FIGURE 8
BREAKLINE
CAROLINAS
EXAGGERATION
S:J.CHA
GENERAL CROSS SECTION B-B'
THINCAL
DRAWN BY:J.CHASTAIN DATE:7/26/2019
REVISED BY: D. KREFSKI DATE: 12/7/2019
- — - COMPLIANCE BOUNDARY
FRACTURED BEDROCK EVALUATION
41P
CHECKED BY: L.. DATE: 12/7/2019
ALLEN STEAM STATION
APPROVED BY: C. SUTTELL DATE: 12/7/2019
SUTT
PROJECT MANAGER:C.SUTTELL
BELMONT, NORTH CAROLINA
LAYou
WRSynterracorp.com
WnTerra

z
O
Q
W
J
W
A
(WEST) c
a
O
z
700 a
N
ASH
STORAGE
AREA
lrn
II I MI I
uLq
Q Q n -ASH PORE N
650 SAPROLITE , ; , ; I WATER
a a FILL
-_-- - --__ -- - -- -----------
- �-=
_ -- — — ---_'_
SAPROLITE
<5
630.9 '
600
COMPLIANCE BOUNDARY
RETIRED ASH BASIN
STRUCTURAL FILL - -
i
LL�Y N
t0 �
--= FILL M M
______ -_ ___ — a a
EL�
116 =_
RETIRED ASH BASIN ASH LANDFILL
622._3_0'=_=____ __ _--------____ -_ ---- - _ — -------------------------------
---- ---- --- --- ---- ---- __=_r3Sit=== _�
==:615.52'-==-===_====-===_====-===-=======-=======------- -----"-=z=-=-_-_-_-__-
--------------
-------------------------------------
9.8j,S1--------------------_--- ------
�► 623.12' AWATERSH E <50
TRANSITION ZONE`' SAPROLITE
580.14'
<50 a III \I SAPROLITE 57•81, SfiqD1 -.
/1628.7-d�1� I i \/ \,`� /I \l �Ti/t1t� �i /I \l '\`�\1 ��� /I \l ♦' �,
62 S7
/ \♦ I _ \`- / /\` TRANSITION ZONE _ \ 579.35'
W1:�/\� � 1 \/♦ / / /�\/` /1 '�'��•� � , \i �
BEDROCK L!— I \ / I X'i I , I •ems
� IL H
7.6�, S1 — \ � /�—_ \ — / —_ \ " \ � /�-- \ — / " \ � /\—y� / �— \ � /�—_ 766
I' \ / I \ / ; / \ \ / I \ / \ // I 624 \ / i \ / I \ / i / �/ I i \ / i \ / I \ / i / \ / .r{ i \ % i / \ / I \� ` / I / / \ / I f\x 72.98'
Ail\l\�\� \`�\`mil\/I/\i`i ♦��/I/\�/\�/I,\
♦' / — \ \ i / — _ \' / —�\ \ i / — \'� / — ♦' / — _ \' / — \ \ i .BEDROCK'-
"\/\I/1�'\/\I/\\ �
60 S1
629.79'
ASH PORE WATER
%\ /1
200
BEDR`OCKI/\\/\/,I/1\/ /\I/1\/\/,I/\\/ /\I/\\/\/,I/\\/ /\I/1\/\/,I/1\/ /\I/1,I/\\/ /\I/\,I/\\/ /\I/1�BEDROCK\/\I/\\'
i i t \\/ I/ \ i l \`/ l i l i l \`/ I/ \ i l \\/ l i l i l \`/ I/\ i t \\/ l i l i l \`/ I/ \ i l \`/ l i l i l \`/ I/ \ i l \\/ l i l i l \`/ I/\ i t \`/ l i l i l \`/ I/ \ i l \`/ l i l i l \`/ I/\ i t \\/ l i l i l \`/ I/\ i t \`/ l i l i l \`/ I/ \ i l \\/ l i l i l \`•
I i \`i �\`/ I / \ i l \\/ I � \`� �\\/ I / \ i l \\/ I � \`� �\\/ I / \ i l \\/ I � \`� �\`/ I / \ i l \\/ I � \`� �\\/ I / \ i l \\/ I � \`� �\\/ I / \ i l \\/ I � \`� �\`/ I / \ i l \\/ I � \`� �\\/ I / \ i l \\/ I � \`� �\\/ I / \ i l \\/ I � \`� �\`/ I / \ i l \\/ I � \`i �\`•
\ / \
0- l \ / I
LEGEND
GWA-22S WELL IN FILL/ALLUVIUM/SAPROLITE ASH PORE WATER FLOW LAYER
WATER LEVEL ELEVATION \ : /I _ \\� I . \ \ I /_ \ \ / I . \ \ I / \ \ / I . \ I / \ \ / I • \ \
GWA-22D WELL IN TRANSITION ZONE ` / - - ` � � � � � `' ` � - - ` �� ' � - ` `' ` / - - ` �• � / � � `' ` / - - ` �• `
CANAL ROAD ALLh GWA-216R WELL IN BEDROCK SHALLOW ZONE FLOW LAYER GROUNDWATER
WELL WATER LEVEL ELEVATION NOTES
STEAM AB-35S WELL IN ASH PORE WATER DEEP ZONE FLOW LAYER GROUNDWATER
STATION
C'
(EAST)
I
I
I
I
I
I
I
I
I
I
I
I
9�
mm
as
CATAWBA R
(LAKE WYL
EL.565'
ALLUVIUM
700
650
600
550
500
450
250
200
150
100
GWA-5BR
ABANDONED WELL/
WELL WATER LEVEL ELEVATION
1.
DEPTH TO WATER GAUGED IN MONITORING WELLS ON MARCH 13, 2019, REFERENCED TO NORTH AMERICAN VERTICAL DATUM (NAVD) OF 1988.
PLANTAL N RD. ` C.
GEOTECHNICAL BORING
� BEDROCK FLOW LAYER GROUNDWATER
2.
FRACTURES DEPICTED ON THIS CROSS SECTION REPRESENTS THE GENERALIZED FRACTURE ORIENTATIONS BASED ON TELEVIEWER LOGGING AT
AL34
WATER SUPPLY WELL —
WELL WATER LEVEL ELEVATION
SITE SPECIFIC BOREHOLES. AS CONCEPTUALLY ILLUSTRATED HERE, TELEVIEWER LOGGING RESULTS DID NOT INDICATE ANY DISTINCT,
(DEPTH UNKNOWN)
CONSISTENT FRACTURE SETS, BUT WIDE VARIETY OF FRACTURE ORIENTATIONS AT THE SITE. THE ACTUAL NUMBER OF FRACTURES IS FAR TOO
RETIRED
ASH BASIN
.
BORON CONCENTRATION (NFL)
NUMEROUS TO ILLUSTRATE AT THIS SCALE. IN ADDITION, THE DEPTH AND LENGTH OF FRACTURES VERSUS DEPTH ARE CONCEPTUAL ONLY.
(ASH STORAGE/
GENERALIZED WATER TABLE
WATER LEVEL ELEVATION (NAVD 88)
3.
ALL BOUNDARIES ARE APPROXIMATE.
STRUCTURAL FILL) RETIRED
��
GENERALIZED GROUNDWATER
(LABEL COLORING BY FLOW ZONE)
ASH BASIN
ASH LANDFILL
FLOW DIRECTION
4.
CROSS SECTION REPRESENTATIVE OF PRE -DECANTING CONDITIONS.
GENERALIZED ASH PORE WATER
WELL SCREEN
—�
FLOW DIRECTION
5.
BORON CONCENTRATIONS SHOWN ARE THE MOST RECENT VALUES AS OFJUNE2019.
NOTE:
CROSS SECTION GC' IS LINEAR IN NATURE AND ALL
LOCATIONS NOT ALONG THE CROSS SECTION ARE
PROJECTED ONTO THE CROSS SECTION.
CROSS SECTION LOCATION -
ASH
0 ASH PORE WATER
ALLUVIUM
® FILL
SAPROLITE
® TRANSITION ZONE
BEDROCK
SURFACE WATER
- PREDOMINANT BEDROCK
FRACTURE ORIENTATION
BREAKLINE
- - - - COMPLIANCE BOUNDARY
%''DUKE
n ENERGY
CAROLI NAS
161P
synTerra
GRAPHIC SCALE
0 100 200 400
HORIZONTAL SCALE: 1" = 400'
VERTICAL SCALE: 1" = 80'
5X VERTICAL EXAGGERATION
DRAWN BY: J. CHASTAIN DATE: 7/26/2019
REVISED BY: D. KREFSKI DATE: 12/8/2019
CHECKED BY:L.DRAGO DATE:12/8/2019
APPROVED BY: C. SUTTELL DATE: 12/8/2019
PROJECT MANAGER: C. SUTTELL
LAYOUT: FIGURE_9
www.synterracorp.com
FIGURE 9
GENERAL CROSS SECTION C-C'
FRACTURED BEDROCK EVALUATION
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA

D,
(WWD T)
�_
COMPLIANCE BOUNDARY -
�
(EAST)
i
�
ASH BASIN
I I
p N
i
PRIMARY POND 1 PRIMARY POND 2 — — PRIMARY POND 3
700
N N N
700
90U' �U' Q = a
_ 0�
aava
yp
a as
NNNN
QQQQ
vmiumiuy��n
NNNN N NN
moomm m m 00
�a �
650
1 ASH
- ---------------
a a a ASH
a a s
-----
650
-- ----- _L----
------ ------------_
--------
__ _ ____ _________ 930
WATER - _-637-9T:=__ ___ ____ ____ __________________ _
638.68' -- p m m
= =-_-_v)
7 _=__= ASH -PORE WATER C7
-=:715 _==_- �=_- �=_- �=_- �=_- �=_- �=_- �=_ --- ------
1030a a a
i�
�►
===_==__==__==___==__==___==___==_
=__==___=__==__==__==__==
_______ 636.4T _=_ ___ __ __ __ 0 1 CATAWBA RIVER
SAPROLITE
SAPROLITE
�=___=____________________
==-600
---- _-___________ ____-______= C9 t9 C7 C9 LAKE WYLIE
_____ FILL ( )
EL. 565'
1
��
1250 �� SAPROLITE (APPROX.)
636.39' 317-Z----------
550
j
ETRAN�SITION345
NE
573.74'
550
583.71'
636.34' 1'/Z
�' 1
63611
O
500
\ /�
\I_ \�/
�� - \�/ -��\ _ \�/ -
\/\ /1
�� -r'/ - �\
\ / \ \/\ /1
�\ - \'/ - \-
\ / \ I /
\ /\ /1 \ TRANSITION
�\ - 1 1a.2j,s1 \�/ �� _ \ ZONE
500
J
� `\
%: �,\/i,
, \\ \ ; J/I � \\i ��\/
I � \`� ;.\ � \\i l +!x/
I i \1, \ i l �\/
I � \,;. / I \ i ;<X/ I � \;�
LLI
/I
\
1 / 1 / �� \ / \ / 1
�
BEDROCK\ / 1 / \ / \ / 1
� �
/I
� -� \ /� / 1 / \ /�\ / 1
�
\ /� / 1 / \�/ \ / 1
/
'
,� \ / \ / \ BEDROCK-,
/•\
'
450
/ �-yam\ - /
i
\�_ \ / �-_ \ - �
\ / \ ��� /�-
\ - \ / �-_ \ \ /�-
/ /
_
- \ � �-_ \ - \ /�- \ \ / � -
/ /
450
i \ /
BEDROCK` I '�/ /
1960 575.1
I \ / I \ / T I \ /
�I. �I.
/ 585.19'
400
I 1_-� / �\/
-
I i \ \
�
I i \ \ �`/
I i \ \ �\x
I i \ \ �`/ x . \ \
84.7
400
/ - �� /
-
_ _ �� /�
575.'� �\
- / -
�- / -
- / -
�- / - / - 1 / - - / -
00
_
`
BEDROCK
150
�\/ /BEDROiKr
!Li
'ARTESIAN '
CONDITIONS
ASH BASIN
NOTE:
CROSS SECTION D-D' IS LINEAR IN NATURE AND ALL
LOCATIONS NOT ALONG THE CROSS SECTION ARE
PROJECTED ONTO THE CROSS SECTION.
CROSS SECTION LOCATION
LEGEND
GWA-22S
WELL IN FILL/ALLUVIUM/SAPROLITE
GWA-22D
WELL IN TRANSITION ZONE
GWA-21BR WELL IN BEDROCK
AB-35S
WELL IN ASH PORE WATER
GWA-5BR
ABANDONED WELL/
GEOTECHNICAL BORING
AL34
WATER SUPPLY WELL -
(DEPTH UNKNOWN)
GENERALIZED WATER TABLE
GENERALIZED GROUNDWATER
FLOW DIRECTION
GENERALIZED ASH PORE WATER
FLOW DIRECTION
0
ASH
0
ASH PORE WATER
0
ALLUVIUM
®
FILL
0
SAPROLITE
®
TRANSITION ZONE
BEDROCK
©
SURFACE WATER
--
PREDOMINANT BEDROCK
FRACTURE ORIENTATION
V
ASH PORE WATER FLOW LAYER
WATER LEVEL ELEVATION
_
SHALLOW ZONE FLOW LAYER GROUNDWATER
NOTES
WELL WATER LEVEL ELEVATION
V
DEEP ZONE FLOW LAYER GROUNDWATER
1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON MARCH 13, 2019, REFERENCED TO NORTH AMERICAN VERTICAL DATUM (NAVD) OF 1988.
WELL WATER LEVEL ELEVATION
2. FRACTURES DEPICTED ON THIS CROSS SECTION REPRESENTS THE GENERALIZED FRACTURE ORIENTATIONS BASED ON TELEVIEWER LOGGING
V
BEDROCK FLOW LAYER GROUNDWATER
AT SITE SPECIFIC BOREHOLES. AS CONCEPTUALLY ILLUSTRATED HERE, TELEVIEWER LOGGING RESULTS DID NOT INDICATE ANY DISTINCT,
WELL WATER LEVEL ELEVATION
CONSISTENT FRACTURE SETS, BUT WIDE VARIETY OF FRACTURE ORIENTATIONS AT THE SITE. THE ACTUAL NUMBER OF FRACTURES IS FAR TOO
NUMEROUS TO ILLUSTRATE AT THIS SCALE. IN ADDITION, THE DEPTH AND LENGTH OF FRACTURES VERSUS DEPTH ARE CONCEPTUAL ONLY.
BORON CONCENTRATION (Ng/L)
3. ALL BOUNDARIES ARE APPROXIMATE.
WATER LEVEL ELEVATION (NAVD 88)
(LABEL COLORING BY FLOW ZONE)
4. CROSS SECTION REPRESENTATIVE OF PRE -DECANTING CONDITIONS.
5. BORON CONCENTRATIONS SHOWN ARE THE MOST RECENT VALUES AS OF JUNE 2019.
WELL SCREEN
BREAKLINE
GRAPHIC SCALE
0 100 200 400
-----
COMPLIANCE BOUNDARY
DUKE
ENERGY
HORIZONTAL SCALE: 1" = 400'
VERTICAL
FIGURE 10
5XVERTICALEXAGGERATION
GENERAL CROSS SECTION D-D'
CAROLINAS
DRAWN BY: J. CHASTAIN DATE:7/26/2019
FRACTURED BEDROCK EVALUATION
REVISED BY: D. KREFSKI DATE: 12/8/2019
CHECKED BY: L.DRAGO DATE: 12/8/2019
ALLEN STEAM STATION
116rip
APPROVED BY: C.SUTTELL DATE:12/8/2019
BELMONT NORTH CAROLINA
PROJECT MANAGER: C. SUTTELL
r
LAYOUT: XSECT DID (FIG 10)
synTerid
www.synterracorp.com

750 E - -mom.E'
(WEST) COMPLIANCE BOUNDARY (EAST)
C m N i ACTIVE ASH
BASIN I
700 `'' `�' `�' ~= I ASH BASIN EAST DAM I
Q Q I
C9V' C9= �rnrnrn GIm
mmOytl)fNA fAGmm �
Q Q Q N NNNN N NNNNNNN650 IFILLQaaaaaa aaaa
ASHH
S
ASH WATER ELEVATION = 634
<50 ===______________________________________________________________=
____=�=_=�=_=_ � =_ � _ ------------ASH---�---�-- �-- ===- PORE WATER _________________
3900
�-- �-- �--------------------------- - _== === === === === === === ===�_
640.85_______________ ___ ___ __ __ 637.01 ==_= -=_= -___ __ _____ -___ -__= -___ -___ -___ -_=== === === === === === === === === ==___ tr
_ _�__ � ====-----__-__-__-__ _ _ _ _ _ _ _ _ CATAWBA
__= t=�===�=-=�=-=�=--�----= ---= ---= ---= ---- --- --========================_
___-_ __-_ __=======_=�__ ---__-=====_--------------------- ________________________ fn G 00 00 RIVER
600 ___ ___ ______ _ ____ _ __�______________________ ___= ASH PORE WATER ==_= == �=_===_===_===_===_===_=-- FILL r r r r LAKE
SAPROLITE =_= =__== _ _ _ _======-===-===-===-===-===-===-===-==
I---------------------------------------------------------------------------------------------------------------- 00 OD 00 00 WYLIE)
====================================-=�=--�---�---�---�=-=�=-=�=-=�=-=�=-=�=-=�==�==�==�==�=_=�= EL. 565'
____== �a �a a a
__ ____ ____ ____ ______ _______ _ APPROX.
<50------
------------
550 634.80'
9.1 j, S1 ecm 000
O 640A2 <50 SAPROLITE 595.25'
SAPROLITE
' 641.69'
Q ® TRANSITION ZONE
f� I �► \ � 30.9j S1
> 9.3j, S1 �I I ' \/ i / 9'1j I — \/ i \ TRANSITION ZONE 568.2T
w 500 639.42' ` I/ _ \ ,450 639.94' / _ �I
W /II �\ / 641.69' T40� / \ / 1 /
-
\�/\�/// <50/v
637.35'\
450 / Q / — I \ / /_
�/\'//1 \�/\ /1 �� 7/\ /1 ,�\�\
BEDROCK/ /
.BEDROCK_\
400-
/
—
\/\I/1���/\/1
7 50 / \ . \ I . \ i I / \ i \ I . \ I / \ . \ I . \ i I / \ i \ I . \ I / \ ' \ I . \ I / \ , \ I . \ I / \ , \ I . r
100
50\/\I/1\\/\I/1\\/\I/1\/\I/1\\/\I/1\\/\I/1\\/\I/1\\/\I/1\\/\I/1\\/\I/1\\/\I/1��\/\I/1\�\/\I/1��\/\I/1\�`
LEGEND
GWA-22S WELL IN FILL/ALLUVIUM/SAPROLITE ASH PORE WATER FLOW LAYER
GWA-22D WELL IN TRANSITION ZONE WATER LEVEL ELEVATION
GWA-21BR SHALLOW ZONE FLOW LAYER GROUNDWATER
WELL IN BEDROCK
0 WELL WATER LEVEL ELEVATION NOTES
AB-35S WELL IN ASH PORE WATER DEEP ZONE FLOW LAYER GROUNDWATER
750
700
50
00
GWA-5BR
ABANDONED WELL/
WELL WATER LEVEL ELEVATION
1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON MARCH 13, 2019, REFERENCED TO NORTH AMERICAN VERTICAL DATUM (NAVD) OF 1988.
GEOTECHNICAL BORING
BEDROCK FLOW LAYER GROUNDWATER
2. FRACTURES DEPICTED ON THIS CROSS SECTION REPRESENTS THE GENERALIZED FRACTURE ORIENTATIONS BASED ON TELEVIEWER LOGGING
AL34
WATER SUPPLY WELL -
WELL WATER LEVEL ELEVATION
AT SITE SPECIFIC BOREHOLES. AS CONCEPTUALLY ILLUSTRATED HERE, TELEVIEWER LOGGING RESULTS DID NOT INDICATE ANY DISTINCT,
(DEPTH UNKNOWN)
CONSISTENT FRACTURE SETS, BUT A WIDE VARIETY OF FRACTURE ORIENTATIONS AT THE SITE. THE ACTUAL NUMBER OF FRACTURES IS FAR TOO
BORON CONCENTRATION (ug/L)
NUMEROUS TO ILLUSTRATE AT THIS SCALE. IN ADDITION, THE DEPTH AND LENGTH OF FRACTURES VERSUS DEPTH ARE CONCEPTUAL ONLY.
RETIRED
ASH BASIN
_ GENERALIZED WATER TABLE
WATER LEVEL ELEVATION (NAVD 88)
ASH LANDFILL
GENERALIZED GROUNDWATER
(LABEL COLORING BY FLOW ZONE)
3. ALL BOUNDARIES ARE APPROXIMATE.
FLOW DIRECTION
WELL SCREEN
4. CROSS SECTION REPRESENTATIVE OF PRE -DECANTING CONDITIONS.
GENERALIZED ASH PORE WATER
CATAWBA
FLOW DIRECTION
5. BORON CONCENTRATIONS SHOWN ARE THE MOST RECENT VALUES AS OF JUNE 2019.
RIVER
(LAKE WYLIE)
0 ASH
BREAKLINE
v
E'
0 ASH PORE WATER
----- COMPLIANCE BOUNDARY
GRAPHIC SCALE
ACTIVE
ASH BASIN
0 ALLUVIUM
DUKE
0 100 200 400
® FILL
ENERGY
HORIZONTAL ICALSSCALE:1"=400'
VERTICAL
VERTICAL SCALE: 1" = 80'
FIGURE 11
0 SAPROLITE
5XVERTICALEXAGGERATION
GENERAL CROSS SECTION E-E'
NOTE:
® TRANSITION ZONE
CAROLINAS
DRAWN BY: J. CHASTAIN DATE:7/26/2019
FRACTURED BEDROCK EVALUATION
CROSS SECTION E-E' IS LINEAR IN NATURE AND ALL
LOCATIONS NOT ALONG THE CROSS SECTION ARE
BEDROCK
REVISED BY: D. KREFSKI DATE: 12/9/2019
CHECKED BY: L.DRAGO DATE: 12/9/2019
ALLEN STEAM STATION
PROJECTED ONTO THE CROSS SECTION.
CROSS SECTION LOCATION
O SURFACE WATER
--�-- PREDOMINANT BEDROCK
FRACTURE ORIENTATION
v7
synTerra
APPROVED BY: C. SUTTELL DATE: 12/9/2019
PROJECT MANAGER: C. SUTTELL
LAYOUT: FIGURE 11
www.synterracorp.com
BELMONT, NORTH CAROLINA

Fractured Bedrock Evaluation
December 2019
Duke Energy Carolinas, LLC — Allen Steam Station
TABLES
SynTerra

TABLE 1
ANALYTICAL RESULTS FOR DEEP BEDROCK WELLS
FRACTURED BEDROCK EVALUATION
ALLEN STEAM STATION
DUKE ENERGY CAROLINAS, LLC, BELMONT, NC
Analytical Parameters
Antimony
Arsenic
Beryllium
Boron
Cadmium
Chromium (VI)
Chromium
Cobalt
Iron
Lithium
Manganese
Molybdenum
Nickel
Selenium
Strontium
Sulfate
Thallium
Total
Dissolved
Solids
Vanadium
Reporting Units
µg/L
µg/L
µg/L
µg/L
µg/L
µg/L
µg/L
µg/L
µg/L
µg/L
µg/L
µg/L
µg/L
µg/L
µg/L
mg/L
µg/L
mg/L
µg/L
i5A NCAC 02L Standard
1*
10
4*
700
2
10
10
1*
300
NE
50
NE
100
20
NE
250
0.2*
500
0.3*
Background Threshold Values
3
2
0.1
50
0.08
0.8
10
0.3
1242
26
360
11
7
0.5
181
7
0.1
221
13
Sample ID
Screen Interval
(ft bgs)
Sample
Collection Date
Analytical Results
AB-10BR
150 - 160
03/04/2019
<0.5
0.25
<0.1
537
<0.08
0.076
2.5 S1
0.51
819
<2.5
42.6
1.2
2.7
<0.5
530
48.4
<0.1
285
8.6
AB-10BR
150 -160
06/03/2019
<0.5
0.13
<0.1
571
<0.08
0.053 S1
0.61
0.099 j
188
<2.5
26.8
0.39 j
1.1
<0.5
523
45.1
<0.1
256
7
AB-10BRL
208 - 218
03/05/2019
<0.5
3.1
<0.1
434 S1
<0.08
<0.025
0.94
0.13
240
3.9
45.6
11
1.3
<0.5
467
1S3
<0.1
506
0.47j
AB-10BRL
208 - 218
06/03/2019
<2 D3
13.5
<0.4 D3
406
<0.32 D3
0.068 S1
<2 D3
<0.4 D3
426
<10 D3
94.6
6.8
<2 D3
<2 D3
662
176
<0.4 D3
596
<1.2 D3
GWA-03BRL
461 - 471
03/04/2019
<0.5
1.4
<0.1
<50
<0.08
<0.025
<0.5
<0.1
<50
<2.5
5.1
3
<0.5
0.77
138
6.2
<0.1
126
6.7
GWA-03BRL
461 - 471
06/03/2019
<0.5
1.3
<0.1
17.2 j,S1
<0.08
0.046 S1
<0.5
<0.1
27.1 j
1.3 j
5.6
3.1
<0.5
0.32 j
119
6
<0.1
130
3.6
GWA-04BRL
208 - 218
03/05/2019
0.12 j
1.6
<0.1
244 S1
<0.08
0.44
0.65
0.062 j
46.5 j
13
24.5
7.5
<0.5
0.92
205
54
<0.1
232
6.3
GWA-04BRL
208 - 218
06/03/2019
<5 D3
5.2
<1 D3
167
<0.8 D3
0.044 S1
15.6
<1 D3
210
18.2 j
51.8
45.5
11.6
<5 D3
544
468
<1 D3
2060
3.2
GWA-05BRL
335 - 345
03/04/2019
0.29 j
5.5
<0.1
40.7 j
<0.08
<0.025
<0.5
0.13
171
1.3 j
26.8
8.9
1.9
<0.5
214
38.4
<0.1
211
1.3
GWA-05BRL
335 - 345
06/03/2019
<1 D3
5.3
<0.2 D3
44.9 j,S1
<0.16 D3
0.046 S1
<1 D3
<0.2 D3
51.5
<5 D3
20.7
8
1.1
<1 D3
190
72.3
<0.2 D3
204
1.1
GWA-06BRL
290 - 300
03/05/2019
0.15 j
3.5
<0.1
119 Sl
<0.08
<0.025
<0.5
0.31
135
2.8
63
14.3
0.481
<0.5
344
49.4
<0.1
272
0.37 j
GWA-06BRL
290 -300
06/03/2019
<1 D3
4.9
<0.2 D3
30.9 j,S1
<0.16 D3
0.043 S1
1.7
0.55
667
5.1
71.7
20.3
2.3
<1 D3
407
94.1 Al
<0.2 D3
256
1.1
Notes:
Background Threshold Values updated with Background Results through December 2018.
ft bgs - feet below ground surface
* - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April 1, 2013.
< - concentration not detected at or above the adjusted reporting limit.
µg/L - micrograms per liter
D3 - Sample was diluted due to the presence of high levels of non -target analytes or other matrix interference.
j - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit.
Ll - Analyte recovery in the laboratory control sample (LCS) was above quality control (QC) limits. Results may be biased high.
M1 - Matrix spike recovery was high: the associated Laboratory Control Spike (LCS) was acceptable.
MDC - Minimum Detectable Concentration
mg/L - milligrams per liter
NE - Not established
NM - Not measured
Sl - Data review findings indicate result may be unreliable. Use with caution.
Prepared by: LWD Checked by: EMY
Page 1 of 1

TABLE 2
POROSITY AND BULK DENSITY RESULTS
FRACTURED BEDROCK EVALUATION
ALLEN STEAM STATION
DUKE ENERGY CAROLINAS, LLC, BELMONT, NC
Sample ID
Depth (ft)
Porosity (%)
Grain Density (g/Cm3)
Bulk Density (g/Cm3)
AB-22BR
174.5
0.54
2.965
2.951
AB-22BR
204.0
0.49
2.765
2.755
AB-22BRL
246.0
1.03
2.750
2.729
GWA-5BR
135.0
0.55
2.818
2.806
GWA-5BR
161.5
1.43
2.978
2.937
GWA-6BR
138.0
3.96
2.752
2.655
GWA-6BR
190.0
5.16
2.767
2.653
Prepared by: LWD Checked by: PWA
Notes:
1.0" diameter plugs were drilled and trimmed into right cylinders with a diamond -blade trim saw.
Plugs selected for routine core analysis were cleaned by Soxhlet extraction cycling between a chloroform /methanol (87:13) azeotrope and methanol.
Samples were oven dried at 2400 F to weight equilibrium (+/- 0.001 g).
Porosity was determined using Boyle's Law technique by measuring grain volume & calculating pore volume at ambient conditions.
Grain density values were calculated using Boyle's Law technique by direct measurement of grain volume and weight on dried plug samples.
Grain volume was measured by Boyle's Law technique.
- percent
ft - feet
g/cm3 - gram per cubic centimeter
Page 1 of 1

Fractured Bedrock Evaluation
December 2019
Duke Energy Carolinas, LLC - Allen Steam Station
ATTACHMENT A
SynTerra
BORING LOGS, WELL CON RECORDS, AND WELL
DEV SUMMARY TABLE

PROJECT: DEC Allen
WELL / BORING NO: AB-1 OBR
PROJECT NO: 1026.17
STARTED: 10/16/18 COMPLETED: 10/24/18
DRILLING COMPANY: SAEDACCO
NORTHING: 524955.972 EASTING: 1400594.082
DRILLING METHOD: Air Rotary/Hammer
G.S. ELEV: 573.92 ft M.P. ELEV: 576.70 ft
BOREHOLE DIAMETER: 14 3/4, 10, 6 IN
DEPTH TO WATER:13.5 ft TOTAL DEPTH: 160.0 ft BGS
NOTES: bgs: below ground surface
LOGGED BY: L. Drago CHECKED BY: C. Suttell
w v
U
_
O
0
W
CL
O^
o
U)
3 z
o f
WELL
CONSTRUCTION
Q
DESCRIPTION
g
U
_j
Q
p
o
O
<
�`
m0
CL
CLAY, silty, red (2.5 YR 5/8), very stiff, dry
5
10-0
- —
— — — — — — — — — — — — — — — — — — — — — — — —
CL
Silty CLAY, red (2.5 YR 5/8), firm, dry
15
SC
Sandy CLAY, yellowish brown (10YR 5/6), very loose,
fine grain, wet
20
SW
SAND, white (Gley 1 8/1 N) to dark greenish gray (Gley
25
1 4/1 10GY) very loose to firm, weathered rock
Grouted Casing
SynTerra CLIENT: Duke Energy
148 River Street, Suite 220 PROJECT LOCATION: Belmont, North Carolina
Terra Greenville, South Carolina 29601
s)mPhone:864-421-9999 PAGE 1 OF 6

PROJECT: DEC Allen
WELL / BORING NO: AB-1 OBR
PROJECT NO: 1026.17
STARTED: 10/16/18 COMPLETED: 10/24/18
DRILLING COMPANY: SAEDACCO
NORTHING: 524955.972 EASTING: 1400594.082
DRILLING METHOD: Air Rotary/Hammer
G.S. ELEV: 573.92 ft M.P. ELEV: 576.70 ft
BOREHOLE DIAMETER: 14 3/4, 10, 6 IN
DEPTH TO WATER:13.5 ft TOTAL DEPTH: 160.0 ft BGS
NOTES: bgs: below ground surface
LOGGED BY: L. Drago CHECKED BY: C. Suttell
w v
U
_
O
0
W
CL
O^
o
U)
0 z
OJ
0 E
WELL
CONSTRUCTION
Q
DESCRIPTION
g
U
LU
E Q
p
o
C�
<
m 0
SAND, white (Gley 1 8/1 N) to dark greenish gray (Gley
SW
1 4/1 10GY) very loose to firm, weathered rock
35
(continued)
>>>>
—
------------------------
1 0-inch Diameter Outer
Casing to 78 feet bgs
40
>
SW
SAND, mottled white (7.5 YR 8/1) to dark brown (7.5
YR 3/2), very firm, coarse grain, wet
45
CL
CLAY, light brownish gray (2.5 Y 6/2), hard with quartz
clasts, difficult drilling noted at 43 feet bgs
50
Clayey SAND, light brownish gray, dense with partially
55
SC
weathered rock clasts present, quartz rich, hard
material noted at 50 feet bgs
SynTerra CLIENT: Duke Energy
148 River Street, Suite 220 PROJECT LOCATION: Belmont, North Carolina
Terra Greenville, South Carolina 29601
s)mPhone:864-421-9999 PAGE 2 OF 6

PROJECT: DEC Allen
PROJECT NO: 1026.17
WELL / BORING NO: AB-1 OBR
STARTED: 10/16/18 COMPLETED: 10/24/18
DRILLING COMPANY: SAEDACCO
DRILLING METHOD: Air Rotary/Hammer
BOREHOLE DIAMETER: 14 3/4, 10, 6 IN
NOTES: bgs: below ground surface
NORTHING: 524955.972 EASTING: 1400594.082
G.S. ELEV: 573.92 ft M.P. ELEV: 576.70 ft
DEPTH TO WATER:13.5 ft TOTAL DEPTH: 160.0 ft BGS
LOGGED BY: L. Drago CHECKED BY: C. Suttell
w v
p
U
_
Q O
��
C�
0
DESCRIPTION
W
CL
g
<
O^
U o
LU
U)
0 z
OJ
m0
0 E
E Q
WELL
CONSTRUCTION
65
70
75
80
85
SC
Clayey SAND, light brownish gray, dense with partially
weathered rock clasts present, quartz rich, hard
material noted at 50 feet bgs (continued)
6-inch Diameter Inner
Casing to 140 feet bgs
PWR, brown and white, partially weathered rock with
sit, quartz and black clasts present
Diabase, dark greenish gray, very strong, sound rock,
aphanitic
SynTerra CLIENT: Duke Energy
148 River Street, Suite 220 PROJECT LOCATION: Belmont, North Carolina
Terra Greenville, South Carolina 29601
s)mPhone:864-421-9999 PAGE 3 OF 6

PROJECT: DEC Allen
PROJECT NO: 1026.17
WELL / BORING NO: AB-1 OBR
STARTED: 10/16/18 COMPLETED: 10/24/18
DRILLING COMPANY: SAEDACCO
DRILLING METHOD: Air Rotary/Hammer
BOREHOLE DIAMETER: 14 3/4, 10, 6 IN
NOTES: bgs: below ground surface
NORTHING: 524955.972 EASTING: 1400594.082
G.S. ELEV: 573.92 ft M.P. ELEV: 576.70 ft
DEPTH TO WATER:13.5 ft TOTAL DEPTH: 160.0 ft BGS
LOGGED BY: L. Drago CHECKED BY: C. Suttell
w v
p
U
_
Q O
o
C�
0
DESCRIPTION
W
CL
g
<
O^
U o
LU
U)
0 z
OJ
m 0
0 E
E Q
WELL
CONSTRUCTION
95
100
105
110
115
Diabase, dark greenish gray, very strong, sound rock,
aphanitic (continued)
Diorite, meta -quartz diorite, black and white, very
strong, sound rock, phaneritic, pyrite increases at 129
feet bgs, fracture noted at 147 feet bgs
SynTerra CLIENT: Duke Energy
148 River Street, Suite 220 PROJECT LOCATION: Belmont, North Carolina
Terra Greenville, South Carolina 29601
s)mPhone:864-421-9999 PAGE 4 OF 6

PROJECT: DEC Allen
PROJECT NO: 1026.17
WELL / BORING NO: AB-1 OBR
STARTED: 10/16/18 COMPLETED: 10/24/18
DRILLING COMPANY: SAEDACCO
DRILLING METHOD: Air Rotary/Hammer
BOREHOLE DIAMETER: 14 3/4, 10, 6 IN
NOTES: bgs: below ground surface
NORTHING: 524955.972 EASTING: 1400594.082
G.S. ELEV: 573.92 ft M.P. ELEV: 576.70 ft
DEPTH TO WATER:13.5 ft TOTAL DEPTH: 160.0 ft BGS
LOGGED BY: L. Drago CHECKED BY: C. Suttell
w v
p
U
_
Q O
o
C�
0
DESCRIPTION
W
CL
g
<
O^
U o
LU
U)
0 z
OJ
m 0
0 E
E Q
WELL
CONSTRUCTION
125
130
135
140
145
Diorite, meta -quartz diorite, black and white, very
strong, sound rock, phaneritic, pyrite increases at 129
feet bgs, fracture noted at 147 feet bgs (continued)
Bentonite
SynTerra CLIENT: Duke Energy
148 River Street, Suite 220 PROJECT LOCATION: Belmont, North Carolina
Ter Greenville, South Carolina 29601
Phone:[phone] PAGE 5 OF 6

PROJECT: DEC Allen
PROJECT NO: 1026.17
WELL / BORING NO: AB-1 OBR
STARTED: 10/16/18 COMPLETED: 10/24/18
DRILLING COMPANY: SAEDACCO
DRILLING METHOD: Air Rotary/Hammer
BOREHOLE DIAMETER: 14 3/4, 10, 6 IN
NOTES: bgs: below ground surface
NORTHING: 524955.972 EASTING: 1400594.082
G.S. ELEV: 573.92 ft M.P. ELEV: 576.70 ft
DEPTH TO WATER:13.5 ft TOTAL DEPTH: 160.0 ft BGS
LOGGED BY: L. Drago CHECKED BY: C. Suttell
w v
p
U
_
Q O
o
C�
0
DESCRIPTION
W
CL
g
<
O^
U o
LU
U)
0 z
OJ
m 0
0 E
E Q
WELL
CONSTRUCTION
155
160
165
170
175
Diabase, dark greenish gray, very strong, sound rock,
aphanitic, fracture at 156 feet bgs
f Sand
Well Screen
SynTerra CLIENT: Duke Energy
148 River Street, Suite 220 PROJECT LOCATION: Belmont, North Carolina
Terra Greenville, South Carolina 29601
s)mPhone:864-421-9999 PAGE 6 OF 6

PROJECT: Deep Bedrock Evaluation
WELL/BORING NO:
AB-10BRL
PROJECT NO: 1026.17
STARTED: 10/16/2018
COMPLETED: 01/19/2019
DRILLING COMPANY:
SAEDACCO
NORTHING:
EASTING:
DRILLING METHOD:
Mud Rotary / Air Rotary
G.S. ELEV: 573.679
M.P. ELEV: 576.098
BOREHOLE DIAMETER:
14 3/4" / 10" / 6"
DEPTH TO WATER:
13 ft bgs
TOTAL DEPTH: 502 ft bgs
NOTES:
LOGGED BY:
LWD
CHECKED BY: CJS
V
6.0 ��n) r 7.0
Lq
W
w
_
a 0
DESCRIPTION
U
j
WELL CONSTRUCTION
HPF-Ambient
-0.040 �g 0.040
0
U
HPF-Pumping �
�.OTw�80
(7
a
LL
0. 90°
5-
10-
15-
20-
25-
30-
35-
40-
45-
50-
55-
60-
65-
70-
75-
80-
85-
9o-
95
Inn
Clay: Red (2.5 YR 5/8), very stiff silty clay (CL),
.................
dry
..................
... ...
....................
....................
`
(CL)
Clay and Silt: Red (2.5 YR 5/8), firm silty clay
......................
(CL) dry
... ..................
Sandy Clay: Yellowish brown (10 YR 5/6), very
lose clayey fine sand (SC), wet
(SC)
... `
....................
Sand: White (Gley 1 8/1 N) to dark greenish
.:
gray (Gley 1 4/1 10GY), very loose to firm
weathered rock (sampled as sand)
(SW)
.................
:............:..:.
....
...
:................ti
`
;•;•;•;•
Sand: Mottled white (7.5 YR 8/1) to dark
brown (7.5 YR 3/2), very firm coarse sand
(SW), wet
,
ti
Clay: Light brownish gray (2.5 Y 6/2), hard clay
(CL)
(CL) with quartz clasts; difficult drilling noted
at 43'
;
....................`
Clayey Sand: Light brownish gray, dense clayey
......... ... ...
sand with partially weathered rock clasts
................
present, quartz rich, hard material noted at 50'
.............:
....................
..... .........
PWR: Brown and white, partially weathered
rock with silt, quartz and black clasts present
..........
^ ^non
Diabase: Dark greenish gray, very strong,
AAAAA�
sound rock, aphanitic
..........
..
^^........
^ ^^^
............^n
^n^n
..............
n^n^n^
^n^n^n
n^n^n^
...... ........
n^n^n^
l
_
n^n^n^
..............
.n.n.n
.....
% Stick-up
\/
Grouted 10"
\�
r �` surface casing
r
10" Sch 80 PVC
\�
Surface Casing
r r
r
rN
r
tipSynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Allen Steam Station
Greenville, South Carolina 29601
synTerra Phone: [phone] PAGE i OF 6

PROJECT: Deep Bedrock Evaluation
WELL/BORING NO:
AB-10BRL
PROJECT NO: 1026.17
STARTED: 10/16/2018
COMPLETED: 01/19/2019
DRILLING COMPANY:
SAEDACCO
NORTHING:
EASTING:
DRILLING METHOD:
Mud Rotary / Air Rotary
G.S. ELEV: 573.679
M.P. ELEV: 576.098
BOREHOLE DIAMETER:
14 3/4" / 10" / 6"
DEPTH TO WATER:
13 ft bgs
TOTAL DEPTH: 502 ft bgs
NOTES:
LOGGED BY:
LWD
CHECKED BY: CJS
V
6.0 a a�n) r 7.0
W
w
_
a 0
DESCRIPTION
U
j
WELL CONSTRUCTION
HPF-Ambient
-0.040 �g 1 0.040
0
U
O.00HPF-Pumping 80
1
po IL go.
n^n^
n n
^n^n^
n
105
n^n^n^
n^n^n^
110
Meta -Quartz Diorite: Meta -Quartz Diorite, black
0 C
and white, very strong, sound rock, phaneritic
0
Pyrite increase at 129'; Fracture noted at 147'
115
0
0
120
125
0
130
0
135
0
140
0
145
0
150 n^n^n^ Diabase: Dark greenish gray, very strong,
n^n^n^ sound rock, aphanitic
155 n^n^n^ Fractures noted at 156' and 161'
n^n^n^
n^n^n^
160 AAAAAn
n n n
165 AAAAAA Diabase: Dark greenish gray, very strong,
^n^n^n sound rock, aphanitic
AAAAA� Quartz vein noted from 185-186'
170 ^n^n^n
n^n^n^
175 nnnnnn
n^n^n^
n^n^n^
180 ^n^n^n
n^n^n^
n^n^n^
185 nnnnnn
n^n^n^
190 nnnnnn
n^n^n^
n^n^n^
195 ^n^n^n
n^n^n^
n^n^n^
,n,n,n
casing
. \� �� 6" Sch 80 PVC
.... .. A ua uarded
... \� \� 2 well
... ...
;� �/ �/ ; 2" Sch 40 PVC
.........
r\ \ r
�i
.............
...
....................
....................
.............r \ \ r
.................
....... . ;Z
....................
..............r \ \ r
.............
... ...
r\ \ r
.........
................. r \ \ r
... \
......... N
r\ \ r
r\ \ r
rN
.............
....... ......
....... ......
r\ \ r
................... `i \/ \/ iN
....................
r\ \ r
......... .... �r \/ \/ r�
....................
.............. �r \/ \/ ��
....................r \ \ r
tipSynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Allen Steam Station
Greenville, South Carolina 29601
synTerra Phone: [phone] PAGE 2 OF 6

PROJECT: Deep Bedrock Evaluation
WELL/BORING NO:
AB-10BRL
PROJECT NO: 1026.17
STARTED: 10/16/2018
COMPLETED: 01/19/2019
DRILLING COMPANY:
SAEDACCO
NORTHING:
EASTING:
DRILLING METHOD:
Mud Rotary / Air Rotary
G.S. ELEV: 573.679
M.P. ELEV: 576.098
BOREHOLE DIAMETER:
14 3/4" / 10" / 6"
DEPTH TO WATER:
13 ft bgs
TOTAL DEPTH: 502 ft bgs
NOTES:
LOGGED BY:
LWD
CHECKED BY: CJS
V
6.0 ��n) r 7.0
Lq
W
w
_
a 0
DESCRIPTION
U
j
WELL CONSTRUCTION
HPF-Ambient
-0.040 �g 0.040
0
U
0.0ePF-PPu�mping0 80
(7
Ww")
0. L. go.
- - .................
^^^^^^
Diabase: Dark greenish gray, very strong,
_ ..........
� .�A
205
n^n^n^
sound rock, aphanitic, olive colored clasts
- - - -
^nnnnn
present
..............
210
^"^"^"
Soft zone/potential fracture noted from
....................
= '
n An AAA
Quartz vein noted from 247-248'.-
215
^n^n^n
^n^n^n
..............
220
^n^n^n
-
n^n^n^
^n^n^n
225
^"^"^"
_ _ ..............
^ n ^ n ^ n
n n n
..............
230
n n n
^n^n^n
....................
\ \ \
n n n
... ...
�
235
n^n^n^
n n n
_ . .... .........
^n n n nn
- ..............
....... .......
240
^"^"^"
\ \ \
^ n ^ n ^ n
..............
n^n^n^
245
^^^^^^
::...............
250
n^n^n^
^n^n^n
:::::::.............
..............
255
"""
AAAAAA
........
260
"n"n"n
n n n....................\
.............
\ \
A^A^A^
Diabase: Dark greenish gray, very strong,
265
n^n^n^
sound rock aphanitic
....................
^A^A^A
A^A^A^
Slight red mineralization noted at 312'
.............
270
Drilling rate —2 min/ft at 322'/�/�/�
n^n^n^
n n n
275
n n n
^n^n^n
..............
"' "'
n n n
�
230
^^^^^^
n n n
^ A ^ A ^
..............
285
AAAAAA
..............
""""""""
n n n
n n n
n^n^n^
...............
290
^n^n^n
...
295
^^^^^^
\ \ \
n n n
n n n
\ \ \
Bentonite seal
Sand pack
2" well screen
Sand backfill
Bentonite
backfill
tipSynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Allen Steam Station
Greenville, South Carolina 29601
ynTerra Phone: [phone] PAGE 3 OF 6

PROJECT: Deep Bedrock Evaluation
WELL/BORING NO:
AB-10BRL
PROJECT NO: 1026.17
STARTED: 10/16/2018
COMPLETED: 01/19/2019
DRILLING COMPANY:
SAEDACCO
NORTHING:
EASTING:
DRILLING METHOD:
Mud Rotary / Air Rotary
G.S. ELEV: 573.679
M.P. ELEV: 576.098
BOREHOLE DIAMETER:
14 3/4" / 10" / 6"
DEPTH TO WATER:
13 ft bgs
TOTAL DEPTH: 502 ft bgs
NOTES:
LOGGED BY:
LWD
CHECKED BY: CJS
V
6.0 ��n) r 7.0
Lq
W
w
_
a 0
DESCRIPTION
U
j
WELL CONSTRUCTION
HPF-Ambient
-0.040 �g 0.040
0
U
0.0ePF-PPu�mping0 80
Tw) ■
U. L. 90.
n^n^
n^n^n^
n^n^n^
305 n^n^n^
n^n^n^
n^n^n^
310 n^n^n^
n^n^n^
n^n^n^
315 nnnnnn
n^n^n^
n^n^n^
320 ^n^n^n
n^n^n^
n^n^n^
325 nn^n^n
n^n^n^
n^n^n^
330 AAA AAA
n^n^n^
n^n^n^
335 n^n^n^
n^n^n^
n^n^n^
340 n^n^n^
n^n^n^
n^n^n^
345 ^An AAA
n^n^n^
n^n^n^
350 n^n^n^
n^n^n^
n^n^n^
355 AA^n^n
n^n^n^
n^n^n^
360 ^An AAA
n^n^n^
n^n^n^
365 n^n^n^
n^n^n^
n^n^n^
370 AAAAAn
n^n^n^
375 AAAAAn
0 Meta -Quartz Diorite: Meta -Quartz Diorite, black
380 0 <
and white, very strong, sound rock, phaneritic,
green mineralization present
385 0 IC Increase of pink mineralization noted from
0 390-395', 418', 450-458', 462-482'
390 0
0
395 0
0
nnn
Aquaguard
backfill
tipSynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Allen Steam Station
Greenville, South Carolina 29601
synTerra Phone: [phone] PAGE 4 OF 6

PROJECT: Deep Bedrock Evaluation
WELL/BORING NO:
AB-10BRL
PROJECT NO: 1026.17
STARTED: 10/16/2018
COMPLETED: 01/19/2019
DRILLING COMPANY:
SAEDACCO
NORTHING:
EASTING:
DRILLING METHOD:
Mud Rotary / Air Rotary
G.S. ELEV: 573.679
M.P. ELEV: 576.098
BOREHOLE DIAMETER:
14 3/4" / 10" / 6"
DEPTH TO WATER:
13 ft bgs
TOTAL DEPTH: 502 ft bgs
NOTES:
LOGGED BY:
LWD
CHECKED BY: CJS
V
6.0 ��n) r 7.0
Lq
W
w
_
a 0
DESCRIPTION
U
j
WELL CONSTRUCTION
HPF-Ambient
-0.040 �g 0.040
0
U
HPF-Pumping �
-.0Tw�80
a
LL
0° 90°
0 <
405 0 <
0 <
410 0 <
415 0 <
0 <
420 0 <
0 <
425 0 <
0 <
430 0 <
0 <
435 0 <
0 <
440 0 <
445 0 <
0 <
450 <
0 <
455 0 <
0 <
460 0 <
0<
465 0 <
0<
470 0 <
0<
475 0 <
480 0 <
485 0 <
0 <
490 0 <
0 <
495 0 <
0<
rJ i ,
N�N�\
tipSynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Allen Steam Station
Greenville, South Carolina 29601
synTerra Phone: [phone] PAGE 5 OF 6

PROJECT: Deep Bedrock Evaluation
WELL/BORING NO:
AB-10BRL
PROJECT NO: 1026.17
STARTED: 10/16/2018
COMPLETED: 01/19/2019
DRILLING COMPANY:
SAEDACCO
NORTHING:
EASTING:
DRILLING METHOD:
Mud Rotary / Air Rotary
G.S. ELEV: 573.679
M.P. ELEV: 576.098
BOREHOLE DIAMETER:
14 3/4" / 10" / 6"
DEPTH TO WATER:
13 ft bgs
TOTAL DEPTH: 502 ft bgs
NOTES:
LOGGED BY:
LWD
CHECKED BY: CJS
Caliper(
CJ
6.0 7.0
W
i+
CL
_ 0
Q 0
DESCRIPTION
� >
O F
j
WELL CONSTRUCTION
HPF-Ambient
-0.040 (g ) 0.040
W
U
O.OePF-PPuumpingO.80
Q
(gw")
o. LL go.
SynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Allen Steam Station
Greenville, South Carolina 29601
SynTerra Phone: [phone] PAGE 6 OF 6

PROJECT: Deep Bedrock Evaluation
WELL/BORING NO:
GWA-3BRL
PROJECT NO: 1026.17
STARTED: 11/28/2018
COMPLETED: 01/30/2019
DRILLING COMPANY:
SAEDACCO
NORTHING:
EASTING:
DRILLING METHOD:
Mud Rotary / Air Rotary
G.S. ELEV: 581.168
M.P. ELEV: 580.614
BOREHOLE DIAMETER:
14 3/4" / 10" / 6"
DEPTH TO WATER:
7 ft bgs
TOTAL DEPTH: 472 ft bgs
NOTES:
Artesian well; HPF-P not conducted
LOGGED BY:
LWD
CHECKED BY: CJS
V
6.0 ��n) r 7.0
Lq
W
w
_
a 0
DESCRIPTION
U
j
WELL CONSTRUCTION
HPF-Ambient
-0.040 �g 0.040
0
U
HPF-Pumping �
0.O
(7
Q
9w) .8�
0° U.90°
Clay: Dark reddish gray (10 YR 4/1), stiff, dry,
fine grained (FILL)
- '-
Sandy Silt: Olive (5Y 4/4), soft, moist, contains
10
- _
fine grained sand (ALLUVIUM)
15
-
Sandy Silt: Pale brown (10YR 6/3), very soft,
—
contains fine to medium grained sand
20
T T'
Silty Sand: Pale brown (10YR 6/3), medium,
. T T
contains fine grained sand (ALLUVIUM)
T.'
25
T T'
T'
Sand: Pale brown (10YR 6/3), medium,
30contains
fine grained sand (SAPROLITE)
*fine
Silt: Dark brown and orange, very stiff, dry,
35
grained sand (SAPROLITE)
Sand: Light brown and white, dense, dry, fine
40
grained sand (SAPROLITE)
Very Dense @ 44' bgs
45
;
Contains fine to medium grained sand @ 48'
bgs
•;
Contains medium to coarse grained sand @ 88'
50
bgs
Contains fine gravel @ 113' bgs
55
Reddish brown and white, contains medium to
coarse gained sand @ 118' bgs
60
65
70
75
80
85
90
95
inn
:................ �
�`
i \/ \/
i i� Well Cap
(CL)
... .................�i�
i
i
r
N N
-7.. /�
/
/
(ML)
..........
�%
\/ \/
i
/ /
....................
(SP-
....................
SM)
...............\/�
... ..
/ \/ \/
i
/ /�
....................
.....................
....................�/�
.....................�i�
....................
Nr�
... ..
:::::::::::::::;��
Grouted 10"
(SP)
....................
/ \/ \/
/
r ✓� surface casing
r i�
�r�
\/ \/
i /� 10" Sch 80 PVC
/ / Surface Casing
.....................
i \/ \/
i "
...
r
r /
........................
/ \/ \/
/ !
...
tipSynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Allen Steam Station
Greenville, South Carolina 29601
ynTerrd Phone: [phone] PAGE i OF 5

PROJECT: Deep Bedrock Evaluation
WELL/BORING NO:
GWA-3BRL
PROJECT NO: 1026.17
STARTED: 11/28/2018
COMPLETED: 01/30/2019
DRILLING COMPANY:
SAEDACCO
NORTHING:
EASTING:
DRILLING METHOD:
Mud Rotary / Air Rotary
G.S. ELEV: 581.168
M.P. ELEV: 580.614
BOREHOLE DIAMETER:
14 3/4" / 10" / 6"
DEPTH TO WATER:
7 ft bgs
TOTAL DEPTH: 472 ft bgs
NOTES:
Artesian well; HPF-P not conducted
LOGGED BY:
LWD
CHECKED BY: CJS
V
6.0 ��n) r 7.0
Lq
W
w
_
a 0
DESCRIPTION
U
j
WELL CONSTRUCTION
HPF-Ambient
-0.040 �g 0.040
0
U
0.0ePF-PPu�mping0 80
(7
..
105
�rN /
\ \
r r� Grouted 6"
:................N N i
/ /
\/ \/
/ % casing
110
.. re /
I
/
\ \
\/ \/
/ r
/ �
IN 6" Sch 80 PVC
....
....
....
i
/
\/ \/
i
r r`
115
•. •. •. •.
....
`r�
r 'r.
.................... /
\ \
A \
/ /
r r
rN!
:::::::::::::::::^rN
r` /
Silt: Black and brown, hard, dry, contains very
125
fine grained sand (SAPROLITE)
(ML)
r /
\/ \/
��
'
Sand: Orangish brown and white, some gravel,
:...... /
::::::::::..::...�r� /
\ \
\/ \/
/ rN
/ rN!
130
'.'.'.'.
:.:.:.:.
medium to coarse grained sand (SAPROLITE)
...................
....................`r\ /
/ r\
\/ \/
135
40—
............:...`r�
r�
.................1/�
.................�/�
....................
145
•. •. •. •.
i
\% \%
\
x
0
Meta -Quartz Diorite: Black and white, strong,....................\
0
phaneritic, partially weathered rock cuttings
..............
150
0
present
Potential fracture noted at 148 ft bgs
..............
..............
155
0
Pink mineralization present from 148-156 ft bgs
\ \
0..................................r1
.. ...
r
160
0 IC
165
0 <
170
0
0 Ic
175
0 Ic
.............. �r1\�
\�
/N
............. ;/1
\/ \/
i;
180
0
..............
185
.............
0
Meta -Quartz Diorite: Black and white, strong,....................
0
sound rock, quartz dominant, minor green
..............
190
0
mineralization, phaneritic
Pink mineralization present at 201 ft bgs
/
\i \i
\i \i
it A ua uarded
r
0 Ic
2" well
195
Q <
tipSynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Allen Steam Station
Greenville, South Carolina 29601
ynTerra Phone: [phone] PAGE 2 OF 5

PROJECT: Deep Bedrock Evaluation
WELL/BORING NO:
GWA-3BRL
PROJECT NO: 1026.17
STARTED: 11/28/2018
COMPLETED: 01/30/2019
DRILLING COMPANY:
SAEDACCO
NORTHING:
EASTING:
DRILLING METHOD:
Mud Rotary / Air Rotary
G.S. ELEV: 581.168
M.P. ELEV: 580.614
BOREHOLE DIAMETER:
14 3/4" / 10" / 6"
DEPTH TO WATER:
7 ft bgs
TOTAL DEPTH: 472 ft bgs
NOTES:
Artesian well; HPF-P not conducted
LOGGED BY:
LWD
CHECKED BY: CJS
V
6.0 ��n) r 7.0
Lq
W
w
_
a 0
DESCRIPTION
U
j
WELL CONSTRUCTION
HPF-Ambient
-0.040 �g 0.040
0
U
0.0ePF-PPu�mping0 80
205
210
215
230
235
240
245
250
255
260
0
0
iAAAAAA,Meta-Quartz
4
_
�`
....................
....................
'
\/ \/
r r
�r \r
�r �r
..............
" " "
Diabase: Dark greenish gray, strong, sound
rock, aphanitic
AAAAAAsound
�"A"A^
" "rock,
Diorite: Black and white, strong,220
rock, phaneritic"n"n"n Potential fracture noted from 216-217 ft bgs,n^n^n^notable water coming from the borehole5
Diabase: Dark greenish gray, strong, sound"
aphanitic
Drilling rate — 2 min/ft
0
0
0
0
0
0
0
0
0
0
................
Meta -Quartz Diorite: Black and white, strong,
sound rock, quartz dominant, green
mineralization, phaneritic
Minor pink mineralization present at 238 ft bgs
and 260 ft bgs
Drilling rate ranges from —1.5 min/ft to 2min/ft
...................
....................
..............
•'
..........
...............
......................
:............. ...
........ ...
n"" nn
Diabase: Dark greenish gray, strong, sound
rock, aphanitic
265
210
275
280
285
290
295
:............:
.............•
r r
\/ \/
r r
r r
�r
r r
r r
0
0
0
0
0....................�r
0
0
0
0
Meta -Quartz Diorite: Black and white, strong,
sound rock, pink mineralization, phaneritic
Meta -Quartz Diorite: Black and white, strong,
sound rock, green mineralization, phaneritic
Drilling rate —1.5 min/ft
....................
.. ...
..............
..............
.. ...
........
AAAAAA
^A^A^�
Diabase: Dark greenish gray, strong, sound
rock, aphanitic
,\
Meta -Quartz Diorite: Black and white, strong,
2" Sch 40 PVC
tipSynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Allen Steam Station
Greenville, South Carolina 29601
ynTerra Phone: [phone] PAGE 3 OF 5

PROJECT: Deep Bedrock Evaluation
WELL/BORING NO:
GWA-3BRL
PROJECT NO: 1026.17
STARTED: 11/28/2018
COMPLETED: 01/30/2019
DRILLING COMPANY:
SAEDACCO
NORTHING:
EASTING:
DRILLING METHOD:
Mud Rotary / Air Rotary
G.S. ELEV: 581.168
M.P. ELEV: 580.614
BOREHOLE DIAMETER:
14 3/4" / 10" / 6"
DEPTH TO WATER:
7 ft bgs
TOTAL DEPTH: 472 ft bgs
NOTES:
Artesian well; HPF-P not conducted
LOGGED BY:
LWD
CHECKED BY: CJS
V
6.0 ��n) r 7.0
Lq
W
w
_
a 0
DESCRIPTION
U
j
WELL CONSTRUCTION
HPF-Ambient
-0.040 �g 0.040
0
U
0.0ePF-PPu�mping0 80
V
sound rock, green and pink mineralization,
-------"I',
1r �r
305
310
315
320
325
330
335
340
345
350
355
0
0....................
0
0
0
0
0
0
0
phaneritic
-
..............
�r �r
�r �r
r r
�r
�r �r
r r
r r
�r �r
r r
�r �r
r r
�r �r
�r �r
�r �r
..............
..............
....................�r
......
.............
.. ...
....................
.............. ...
............ ..
.............. ...
. ......
..............
AAA' ^^
^nn
n^n^n^
Diabase: Dark reenish ra stron sound
9 9 Y 9
rock, aphanitic
.....
.. ..........
0
0
0
0
0
Meta -Quartz Diorite: Dark green and pink,
strong, sound rock, phaneritic
Potential fracture noted at 354 ft bgs
360
365
370
375
380
0
0
-V
.............. ...
....................
-
....................
....................
0
0
0
0
0
0
Meta -Quartz Diorite: Black and white, strong,
sound rock, minor green and pink
mineralization, phaneritic
Potential fracture noted at 466 ft bgs
....
..............
385
0
0
::::::::.
Irr
..............
390
0
_
0
... ...
_
r
395
0A
= r
I
0
Ann
............:::::
tipSynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Allen Steam Station
Greenville, South Carolina 29601
synTerra Phone: [phone] PAGE 4 OF 5

PROJECT: Deep Bedrock Evaluation
WELL/BORING NO:
GWA-3BRL
PROJECT NO: 1026.17
STARTED: 11/28/2018
COMPLETED: 01/30/2019
DRILLING COMPANY:
SAEDACCO
NORTHING:
EASTING:
DRILLING METHOD:
Mud Rotary / Air Rotary
G.S. ELEV: 581.168
M.P. ELEV: 580.614
BOREHOLE DIAMETER:
14 3/4" / 10" / 6"
DEPTH TO WATER:
7 ft bgs
TOTAL DEPTH: 472 ft bgs
NOTES:
Artesian well; HPF-P not conducted
LOGGED BY:
LWD
CHECKED BY: CJS
V
6.0 ��n) r 7.0
Lq
W
w
_
a 0
DESCRIPTION
U
j
WELL CONSTRUCTION
HPF-Ambient
-0.040 �g 0.040
0
U
0.0ePF-PPu�mping0 80
Tw) ■
U. U. 90.
'_
....................
Q..............
.. ...
405
Q
—
....................
Q
410
Q
—
....................
4150—
Q
— —
420
Q
Q
Bentonite seal
425
Q
..............
— —
Q....................
430
Q
— —
Q_-.
..........9.
435
Q
— —
Q
.............:
440
445
Q
Q::....:::
Q
.........
—
—
....
450
Q
Q�*............
—
....................
455
Q
Q
.. ...
..............
460
—
;•
Q
..............
—
465
470
�..
.:.'� Sand pack
=_ 2" well screen
' '—' '
Diabase: Dark greenish gray, highly weathered
rock, purple and red mineralization present
Artesian fracture zone noted from 466-470 ft
bgs
Meta -Quartz Diorite: Black and white, strong,
sound rock, phaneritic
tipSynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Allen Steam Station
Greenville, South Carolina 29601
synTerra Phone: [phone] PAGE 5 OF 5

PROJECT: Deep Bedrock Evaluation
WELL/BORING NO:
GWA-4BRL
PROJECT NO: 1026.17
STARTED: 11/07/2018
COMPLETED: 01/14/2019
DRILLING COMPANY:
SAEDACCO
NORTHING:
EASTING:
DRILLING METHOD:
Mud Rotary / Air Rotary
G.S. ELEV: 580.458
M.P. ELEV: 580.315
BOREHOLE DIAMETER:
14 3/4" / 10" / 6"
DEPTH TO WATER:
17 ft bgs
TOTAL DEPTH: 503 ft bgs
NOTES:
LOGGED BY:
LWD
CHECKED BY: CJS
V
6.0 ��n) r 7.0
Lq
W
w
_
a 0
DESCRIPTION
U
j
WELL CONSTRUCTION
HPF-Ambient
-0.040 �g 0.040
0
U
HPF-Pumping �
-.O�wI
(7
Q
.8�
0. U.90°
u
-
Sandy Silt: Yellowish red (5YR 5/6), stiff, low....................`i`
i
\/ �/
/ / Well Cap
5
_
,-
plasticity, dry, cohesive (FILL)
...
......::::���
\/ \/
_ -
Medium, contains lenses of gravel at 8 ft bgs
�%
.................�/\
/
r /�
\/ \/
— ...
•.
T.
T T
Silty Sand: Reddish yellow (5YR 6/8), loose,
(SM)
..........
:::..........:::::::`i`
`i`
i
\/ \/
\ \
i i`
20
T'
non -plastic, wet, non -cohesive, contains
/
r /�
o : •
GP_
medium to coarse grained sand (ALLUVIUM)
`/�
Gravel: Reddish yellow 5YR 6/8) contains clay
25
��!'�
GC)
/
\/ \/
, ,-
T T
and coarse grained sand, loose, non -plastic,
..................
30
T -r
wet, non -cohesive (ALLUVIUM)
Silty Sand: Mottled white (N 8/) and greenish
.................\/�
............
T T
T
• T ;
35
T
T
TT
gray (5G 5/1), very loose, non -plastic, wet,
""""""""'`i`
i
\/ \/
i i`
T T
non -cohesive, fine to coarse sand, micaceous
........ ........
T T;
•
(SAPROLITE)
::::::::::::..:::L/�
40
T T
Medium dense at 33 ft bgs
`i`
i
\/ \/
i i`' Grouted 10"
T T:
T
Reddish yellow (7.5YR 6/8) and moist at 43 ft
.................\/\
/
\/ \/
r
r �� surface casing
45
r.
: T M.
bgs
\ \
/ / 10" Sch 80 PVC
' M. T •
•.T. M.
.................1/�
....................\/\
/
\ \
Surface Casing
/ /�
50
................
T T
Silty Sand: Mottled white (N/8) and greenish
M. T.
gray (5G 5/1) and reddish yellow (7.5YR 6/8),
(SM)
55
:T T
medium dense, non -plastic, moist,
..................
,
T T:
non -cohesive, micaceous, contains fine to
. .. .........::....
....................r\
60
.T T•
coarse grained sand (SAPROLITE)
Wet at 53 ft bgs
Fine grained, dense, very dark grayish green
.............
65
(5G 3/2) at 58 ft bgs
Sand: Mottled white (N/8), reddish yellow
..............
70
••T
(7.5YR 6/8), very dense, non -plastic, moist,
.................
T'
T....................\
non -cohesive, micaceous, contains medium to
... ;;;;;;;;;,,,,,`;`
\
;
\
75
T T'
coarse grained sand (SAPROLITE)\�\
Z
Silty Sand: Dark grayish green (5G 3/2), very
T
80
T T :
T .
dense, non -plastic, dry, non -cohesive, contains
.
fine grained sand (SAPROLITE)
.................
Meta -Quartz Diorite: Black and white, partially.....................
85
0
0
weathered rock, moderately weak
....................
..............
0
..............
Grouted 6"
g0
\� \�
casing
0
Meta -Quartz Diorite: Black and white,
95
�"""""'
�
� 6" Sch 80 PVC
0
moderately strong, sound rock, minor green
::::::::::::::
\� \
/ /
\/ \/
, arded
inn
i--�
mineralization haneritic
, p
:::::::::::::
\� \�
2�� Well
2" well
tipSynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Allen Steam Station
Greenville, South Carolina 29601
synTerra Phone: [phone] PAGE i OF 6

PROJECT: Deep Bedrock Evaluation
WELL/BORING NO:
GWA-4BRL
PROJECT NO: 1026.17
STARTED: 11/07/2018
COMPLETED: 01/14/2019
DRILLING COMPANY:
SAEDACCO
NORTHING:
EASTING:
DRILLING METHOD:
Mud Rotary / Air Rotary
G.S. ELEV: 580.458
M.P. ELEV: 580.315
BOREHOLE DIAMETER:
14 3/4" / 10" / 6"
DEPTH TO WATER:
17 ft bgs
TOTAL DEPTH: 503 ft bgs
NOTES:
LOGGED BY:
LWD
CHECKED BY: CJS
V
6.0 ��n) r 7.0
Lq
W
w
_
a 0
DESCRIPTION
U
j
WELL CONSTRUCTION
HPF-Ambient
-0.040 �g 0.040
0
U
0.0ePF-PPu�mping0 80
v
Potential fracture noted at 93 ft bgs
105
0
110
0
115
0
120
0
125
0
Meta -Quartz Diorite: Black and white, strong,
0
sound rock, phaneritic
Pink mineralization noted at 173 ft bgs
130
0 <
Potential fracture noted at 197 ft bgs
0
135
0
140
0
145
0
0
150
0
155
0
160
0
0
165
0
170
0
175
0
180
0
185
0
0
190
0
0
195
0
Meta -Quartz Diorite: Dark green and pink,
....................
..............,1
,.
....................
�i 2" Sch 40 PVC
....................
....................
....................
....................
....................
I ;r
.............
r\ \ r
.............
....................
....................
r1 \ \ rl
....................
..............
... ...
... ...
..............
\/ \/
\� r
....................
\� r
... ...
:.............
\� r
..
i r
�.
:........
Bentonite seal
tipSynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Allen Steam Station
Greenville, South Carolina 29601
synTerra Phone: [phone] PAGE 2 OF 6

PROJECT: Deep Bedrock Evaluation
WELL/BORING NO:
GWA-4BRL
PROJECT NO: 1026.17
STARTED: 11/07/2018
COMPLETED: 01/14/2019
DRILLING COMPANY:
SAEDACCO
NORTHING:
EASTING:
DRILLING METHOD:
Mud Rotary / Air Rotary
G.S. ELEV: 580.458
M.P. ELEV: 580.315
BOREHOLE DIAMETER:
14 3/4" / 10" / 6"
DEPTH TO WATER:
17 ft bgs
TOTAL DEPTH: 503 ft bgs
NOTES:
LOGGED BY:
LWD
CHECKED BY: CJS
V
6.0 ��n) r 7.0
Lq
W
w
_
a 0
DESCRIPTION
U
j
WELL CONSTRUCTION
HPF-Ambient
-0.040 �g 0.040
0
U
0.0ePF-PPu�mping0 80
V
potential fracture zone, phaneritic
0 <
Potential fracture noted at 210 ft bgs
...........—
—
205
0
— —
210
215
0
0
_
:::::
............
`} .
=
—
Meta -Quartz Diorite: Black and white, strong,
sound rock, phaneritic
220
Potential fracture noted from 215-217 ft bgs
0
Meta -Quartz Diorite: Pink and dark green,
225
230
235
240
245
250
255
265
270
275
280
285
290
295
0
0
0
0
0
0
0
0
0
0
0 <
0
0
0
0
0
0
0
0
0
0
0
0
0
0o
phaneritic
-
. ..........
�N N
///11
Meta -Quartz Diorite: Black and white, strong,
sound rock, phaneritic
Pink mineralization noted at 275-288 ft bgs
:.............
....................
..............
... ...
............../�/�/
.........
......... ..
... ...
.................
.............
..............
::::::::::::::
.. ...
..............
...................
................. .. ...
....................
Sand pack
2" well screen
Sand backfill
Bentonite
backfill
tipSynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Allen Steam Station
Greenville, South Carolina 29601
synTerra Phone: [phone] PAGE 3 OF 6

PROJECT: Deep Bedrock Evaluation
WELL/BORING NO:
GWA-4BRL
PROJECT NO: 1026.17
STARTED: 11/07/2018
COMPLETED: 01/14/2019
DRILLING COMPANY:
SAEDACCO
NORTHING:
EASTING:
DRILLING METHOD:
Mud Rotary / Air Rotary
G.S. ELEV: 580.458
M.P. ELEV: 580.315
BOREHOLE DIAMETER:
14 3/4" / 10" / 6"
DEPTH TO WATER:
17 ft bgs
TOTAL DEPTH: 503 ft bgs
NOTES:
LOGGED BY:
LWD
CHECKED BY: CJS
V
6.0 ��n) r 7.0
Lq
W
w
_
a 0
DESCRIPTION
U
j
WELL CONSTRUCTION
HPF-Ambient
-0.040 �g 0.040
0
U
0.0ePF-PPu�mping0 80
T■ )
po IL go.
305
310
315
320
325
330
335
340
345
350
355
360
365
370
375
380
385
390
395
AnA
O-
O
O
O
O
O......
O
O
O
O
O
O
O
O
O
- --
.............
...........
............::::::
rrr
\rNrNr�
\r\r\r\
rrr
\
j� j� j�
\r\r\r\
r r r
rri
r r r
��X�
rrr
�r�rNr\
�j�jN/
%
\
\r\r\r\
..............
::::
:::::::..:::::
.................
.......... ...
-
K
V;
..............
..............
..............
..............
... ..........
..
...................
....
AAAAAA
Diabase: Dark greenish gray, strong, sound
rock, aphanitic
O
O
O
O
O
O
O
O
Meta -Quartz Diorite: Black and white, green
mineralization, strong, sound rock, phaneritic
Pink mineralization noted at 380 ft bgs
«
.............
..............
-.- -.
.. ...
.................
.........
..............
n A n A n
n n n
Diabase: Dark greenish gray, strong, sound
rock, aphanitic, contains pink mineralized clasts
O
O
Meta -Quartz Diorite: Black and white, pink
mineralization, strong, sound rock, phaneritic
.................
::::::::::::::
O
O
O
Meta -Quartz Diorite: Black and white, green
mineralization, strong, sound rock, phaneritic
Drilling rate — 2 min/ft
Decrease in green mineralization at 443 ft bgs
................:.:.
..................
... ...
Aquaguard
backfill
tipSynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Allen Steam Station
Greenville, South Carolina 29601
synTerra Phone: [phone] PAGE 4 OF 6

PROJECT: Deep Bedrock Evaluation
WELL/BORING NO:
GWA-4BRL
PROJECT NO: 1026.17
STARTED: 11/07/2018
COMPLETED: 01/14/2019
DRILLING COMPANY:
SAEDACCO
NORTHING:
EASTING:
DRILLING METHOD:
Mud Rotary / Air Rotary
G.S. ELEV: 580.458
M.P. ELEV: 580.315
BOREHOLE DIAMETER:
14 3/4" / 10" / 6"
DEPTH TO WATER:
17 ft bgs
TOTAL DEPTH: 503 ft bgs
NOTES:
LOGGED BY:
LWD
CHECKED BY: CJS
V
6.0 ��n) r 7.0
Lq
W
w
_
a 0
DESCRIPTION
U
j
WELL CONSTRUCTION
HPF-Ambient
-0.040 �g 0.040
0
U
0.0ePF-PPu�mping0 80
0
405
0
0
410
0
415
0
420
0
0
425
0
0
430
0
0
435
0
0
440
0
445
A AnAn
Diabase: Dark greenish gray, strong, sound
n^n^n^
rock, aphanitic
Meta -Quartz Diorite: Black and white, strong,
450
0
sound rock, phaneritic
455
0
^^^ n nn
Diabase: Dark greenish gray, strong, sound
0
460
rock, aphanitic
0
Drill noted as skipping at 460 ft bgs
Meta -Quartz Diorite: Black and white, minor
465
0
green and pink mineralization, strong, sound
0 <
rock, phaneritic
470
0
Decrease in pink mineralization at 494 ft bgs
0
Drill noted as skipping at 501 ft bgs
475
0
480
0
0
485
0
490
0
0
495
0
0
rnn
n.n,n
N�N�\
tipSynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Allen Steam Station
Greenville, South Carolina 29601
synTerra Phone: [phone] PAGE 5 OF 6

PROJECT: Deep Bedrock Evaluation
WELL/BORING NO:
GWA-4BRL
PROJECT NO: 1026.17
STARTED: 11/07/2018
COMPLETED: O1/14/2019
DRILLING COMPANY:
SAEDACCO
NORTHING:
EASTING:
DRILLING METHOD:
Mud Rotary / Air Rotary
G.S. ELEV: 580.458
M.P. ELEV: 580.315
BOREHOLE DIAMETER:
14 3/4" / 10" / 6"
DEPTH TO WATER:
17 ft bgs
TOTAL DEPTH: 503 ft bgs
NOTES:
LOGGED BY:
LWD
CHECKED BY: CJS
Caliper(
CJ
6.0 7.0
W
i+
CL
_ 0
Q 0
DESCRIPTION
� >
O F
j
WELL CONSTRUCTION
HPF-Ambient
-0.040 (g ) 0.040
W
U
O.OePF-PPuumping0.80
Q
(gw")
o. LL go.
^A^A^J Diabase: Dark greenish gray, strong, sound
^ ^ rock, aphanitic
SynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Allen Steam Station
Greenville, South Carolina 29601
SynTerra Phone: [phone] PAGE 6 OF 6

PROJECT: Deep Bedrock Evaluation
WELL/BORING NO:
GWA-SBRL
PROJECT NO: 1026.17
STARTED: 10/31/2018
COMPLETED: 01/11/2019
DRILLING COMPANY:
SAEDACCO
NORTHING:
EASTING:
DRILLING METHOD:
Mud Rotary / Air Rotary
G.S. ELEV: 581.461
M.P. ELEV: 581.164
BOREHOLE DIAMETER:
14 3/4" / 10" / 6"
DEPTH TO WATER:
18 ft bgs
TOTAL DEPTH: 502 ft bgs
NOTES:
LOGGED BY:
LWD
CHECKED BY: CJS
V
6.0 ��n) r 7.0
Lq
W
"
w
_
Q 0
DESCRIPTION
U
j
WELL CONSTRUCTION
HPF-Ambient
-0.040 �g 1 0.040
0
U
0.0ePF-PPuwmping0 80
(7
TwI ■
U• L. 9o-
1
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
inn
�o►.
Gravel: Road bed (FILL)
............ `
—
Sandy Silt: Brown (7.5YR 4/2) (FILL)
(ML)
...
:. ..
Silty Clay: Brown (7.5YR 4/2), soft, dry,
... ...............
cohesive (FILL)
....................:
... •_•
Very soft at 18 ft bgs
..
_
' -
....................
................;
............:::::^
Clay: Brown (7.5YR 4/2), soft, dry (FILL)
Medium at 28 ft bgs
(CL)
`
Dark yellowish brown (10YR 4/4), high
... ...
............:::�
plasticity, cohesive at 33 ft bgs
....................,
Sandy Clay: Dark yellowish brown (10YR 4/4),
medium, high plasticity, cohesive, contains fine
`
•
grained sand (FILL)
.... •
(SP)
Sand: Olive brown (2.5YR 6/8). loose (FILL)
.........
... ........
--
Silt: Olive yellow (2.5Y 6/8), very stiff
...
--
(ALLUVIUM)
—11
....................
-=
—
Olive brown (2.5Y 4/3) and white at 57 ft bgs
(ML)
::.................
....................
T T:
Silty Sand: Light brown (7.5YR 6/3) and white,
..................�
.................�
T T
dense (SAPROLITE)
•.T. T.
(SM)
..................
TT•
. T .
.................�
.............
•;
Sand: Light brown (7.5YR 6/3) and white
•
(N/9.5), very dense (SAPROLITE)
..............
•;
Cobble -sized quartzite/river-rock clasts blown
.•.•.•.•
•
out of borehole while advancing
""""""""""
PWR: Partially weathered Meta -Quartz Diorite,
black and white, weak to moderately strong
..............
...............
Well Cap
Grouted 10"
surface casing
10" Sch 80 PVC
Surface Casing
_Z
\/
6` 61
\� \�
,i Grouted 6"
casing
6" Sch 80 PVC
tipSynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Allen Steam Station
Greenville, South Carolina 29601
synTerra Phone: [phone] PAGE i OF 6

PROJECT: Deep Bedrock Evaluation
WELL/BORING NO:
GWA-SBRL
PROJECT NO: 1026.17
STARTED: 10/31/2018
COMPLETED: 01/11/2019
DRILLING COMPANY:
SAEDACCO
NORTHING:
EASTING:
DRILLING METHOD:
Mud Rotary / Air Rotary
G.S. ELEV: 581.461
M.P. ELEV: 581.164
BOREHOLE DIAMETER:
14 3/4" / 10" / 6"
DEPTH TO WATER:
18 ft bgs
TOTAL DEPTH: 502 ft bgs
NOTES:
LOGGED BY:
LWD
CHECKED BY: CJS
V
6.0 ��n) r 7.0
Lq
W
w
_
a 0
DESCRIPTION
U
j
WELL CONSTRUCTION
HPF-Ambient
-0.040 �g 0.040
0
U
0.0ePF-PPu�mping0 80
(7
Tw� ■
U. L. 90.
105
O
Meta -Quartz Diorite: Black and white, strong,
110
sound rock, green mineralization, minor pyrite,
0 IC
phaneritic
0
Potential fracture noted at 132 ft bgs
115
0
120
0
0
125
0
0
130
0
0
135
0
0
140
0
145
0
0
150
0
155
0
0
160
0
� AAAAA
Diabase: Dark greenish gray, strong, sound
165
rock, aphanitic
0
Meta -Quartz Diorite: Black and white, strong,
170
0 C
sound rock, phaneritic
0
Drilling rate —3 min/ft
175
Minor green mineralization starts at 215 ft bgs
0
Minor pink mineralization starts at 233 ft bgs
0 c
Potential fracture noted at 237 ft bgs
180
0
185
0
0
190
0
0
195
0
0
Aquaguarded
2" well
2" Sch 40 PVC
tipSynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Allen Steam Station
Greenville, South Carolina 29601
synTerra Phone: [phone] PAGE 2 OF 6

PROJECT: Deep Bedrock Evaluation
WELL/BORING NO:
GWA-SBRL
PROJECT NO: 1026.17
STARTED: 10/31/2018
COMPLETED: 01/11/2019
DRILLING COMPANY:
SAEDACCO
NORTHING:
EASTING:
DRILLING METHOD:
Mud Rotary / Air Rotary
G.S. ELEV: 581.461
M.P. ELEV: 581.164
BOREHOLE DIAMETER:
14 3/4" / 10" / 6"
DEPTH TO WATER:
18 ft bgs
TOTAL DEPTH: 502 ft bgs
NOTES:
LOGGED BY:
LWD
CHECKED BY: CJS
V
6.0 ��n) r 7.0
Lq
W
w
_
a 0
DESCRIPTION
U
j
WELL CONSTRUCTION
HPF-Ambient
-0.040 �g 0.040
0
U
0.0ePF-PPu�mping0 80
Tw� ■
U. L. 90.
205.E
0
0
210
0
0
215
0
220
0
0
225
0
0
230
0
0
235
0
nAnAnA
Diabase: Dark greenish gray, strong, sound
°..
240
rock, aphanitic
Meta -Quartz Diorite: Black and white, strong,
245
O c
sound rock, phaneritic
Minor green and pink mineralization starts at
250
0
255 ft bgs
0
-
255
0
0
260
0
v
Meta -Quartz Diorite: Black and white, strong,
265
0
sound rock, minor green mineralization,
0
phaneritic�__
270
0
Pink mineralization starts at 313 ft bgs
0
275
0
0
-
280
0
-
-
285
0
0
290
0
-
0
'
295
0
0
.-.
tipSynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Allen Steam Station
Greenville, South Carolina 29601
synTerra Phone: [phone] PAGE 3 OF 6

PROJECT: Deep Bedrock Evaluation
WELL/BORING NO:
GWA-SBRL
PROJECT NO: 1026.17
STARTED: 10/31/2018
COMPLETED: 01/11/2019
DRILLING COMPANY:
SAEDACCO
NORTHING:
EASTING:
DRILLING METHOD:
Mud Rotary / Air Rotary
G.S. ELEV: 581.461
M.P. ELEV: 581.164
BOREHOLE DIAMETER:
14 3/4" / 10" / 6"
DEPTH TO WATER:
18 ft bgs
TOTAL DEPTH: 502 ft bgs
NOTES:
LOGGED BY:
LWD
CHECKED BY: CJS
V
6.0 ��n) r 7.0
Lq
W
w
_
a 0
DESCRIPTION
U
j
WELL CONSTRUCTION
HPF-Ambient
-0.040 �g 0.040
0
U
0.0ePF-PPu�mping0 80
Tw) ■
U. L. 90.
305
0
0
310
0
315
"""""^
Diabase: Dark greenish gray, strong, sound
320
n^n^n^
rock, aphanitic
n^n^n^
n^n^n^
" " "
325
O C
Meta -Quartz Diorite: Black and white, strong,
sound rock, minor green and pink
330
0
mineralization, phaneritic
0
Potential fracture zone noted from 338 to 342
335
0
ft bgs
0
340
0
345
0
350
0
Meta -Quartz Diorite: Pink, black, and white,
0
strong, sound rock, minor green mineralization,
355
phaneritic
0
360
0
0
365
0
0
370
0
0
375
0
Diabase: Potential fracture zone noted from
380
338 to 342 ft bgs
Meta -Quartz Diorite: Black and white, strong,
385
0
sound rock, minor green and pink
0
mineralization, phaneritic
Meta -Quartz Diorite: Pink, black, and white,
390
0 <
0 Ic
strong, sound rock, green mineralization,
phaneritic
395
0
nnn
0
i
Bentonite seal
Sand pack
2" well screen
Sand backfill
Bentonite
backfill
tipSynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Allen Steam Station
Greenville, South Carolina 29601
synTerra Phone: [phone] PAGE 4 OF 6

PROJECT: Deep Bedrock Evaluation
WELL/BORING NO:
GWA-SBRL
PROJECT NO: 1026.17
STARTED: 10/31/2018
COMPLETED: 01/11/2019
DRILLING COMPANY:
SAEDACCO
NORTHING:
EASTING:
DRILLING METHOD:
Mud Rotary / Air Rotary
G.S. ELEV: 581.461
M.P. ELEV: 581.164
BOREHOLE DIAMETER:
14 3/4" / 10" / 6"
DEPTH TO WATER:
18 ft bgs
TOTAL DEPTH: 502 ft bgs
NOTES:
LOGGED BY:
LWD
CHECKED BY: CJS
V
6.0 ��n) r 7.0
Lq
W
w
_
a 0
DESCRIPTION
U
j
WELL CONSTRUCTION
HPF-Ambient
-0.040 �g 0.040
0
U
0.0ePF-PPu�mping0 80
T■ �
po IL go.
N N
V
Meta -Quartz Diorite: Black and white, strong,
405
0 C
sound rock, green mineralization, phaneritic
0
Drill noted as skipping at 489 ft bgs
410
0
415
0
420
0
0
425
0
0
430
0
0
435
0
0
440
0
445
0
0
450
0
455
0
0
460
0
0
465
0
0
470
0
0
475
0
0
480
485
0
0
490
A AnAA
Diabase: Dark greenish gray, strong, sound
nAAAA�
rock, aphanitic
495
Meta -Quartz Diorite: Black and white, strong,
rnn
0
i—\
sound rock, green mineralization, phaneritic
Aquaguard
backfill
tipSynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Allen Steam Station
Greenville, South Carolina 29601
synTerra Phone: [phone] PAGE 5 OF 6

PROJECT: Deep Bedrock Evaluation
WELL/BORING NO:
GWA-SBRL
PROJECT NO: 1026.17
STARTED: 10/31/2018
COMPLETED: O1/11/2019
DRILLING COMPANY:
SAEDACCO
NORTHING:
EASTING:
DRILLING METHOD:
Mud Rotary / Air Rotary
G.S. ELEV: 581.461
M.P. ELEV: 581.164
BOREHOLE DIAMETER:
14 3/4" / 10" / 6"
DEPTH TO WATER:
18 ft bgs
TOTAL DEPTH: 502 ft bgs
NOTES:
LOGGED BY:
LWD
CHECKED BY: CJS
Caliper(
CJ
6.0 7.0
W
i+
CL
_ 0
Q 0
DESCRIPTION
� >
O F
j
WELL CONSTRUCTION
HPF-Ambient
-0.040 (g ) 0.040
W
U
O.OePF-PPuumping0.80
Q
(gw")
o. LL go.
SynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Allen Steam Station
Greenville, South Carolina 29601
SynTerra Phone: [phone] PAGE 6 OF 6

PROJECT: Deep Bedrock Evaluation
WELL/BORING NO:
GWA-6BRL
PROJECT NO: 1026.17
STARTED: 12/13/2018
COMPLETED: 01/17/2019
DRILLING COMPANY:
SAEDACCO
NORTHING:
EASTING:
DRILLING METHOD:
Mud Rotary / Air Rotary
G.S. ELEV: 628.05
M.P. ELEV: 630.607
BOREHOLE DIAMETER:
14 3/4" / 10" / 6"
DEPTH TO WATER:
ft bgs
TOTAL DEPTH: 500 ft bgs
NOTES:
LOGGED BY:
LWD
CHECKED BY: CJS
V
6.0 ��n) r 7.0
Lq
W
w
_
a 0
DESCRIPTION
U
j
WELL CONSTRUCTION
HPF-Ambient
-0.040 �g I 0.040
0
U
0.0ePF-PPuwmping0 80
(7
TwI ■
U. L. 9o.
l
c
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
inn
•.M M.
Silty Sand: Red (IOR 5/8) grading downward to
............:::::1,
: T M.
reddish yellow (5YR 6/6), poorly graded,
............:::\ .. ...
moist, non -plastic, non -cohesive, poor saprolitic
fabric, fine grained (SAPROLITE)
T T
T.'
....................;
.................
\
Silty Sand: Predominantly red (2.5YR 5/6)
T T'
T T
grading downward to light red (2.5YR 6/6),
(SP
T T'
poorly graded, moist, non -plastic,
non -cohesive, fine to very fine grained, trace
SM)
`
T T
•T•
muscovite (SOIL)
;;;;;;;;;;;;
Silty Sand: Predominantly light red (2.5YR 6/6),
\
T T
T T:
poorly graded, moist, non -plastic,
T T
..r.
non -cohesive, fine to very fine grained, poor
M.
relic rock fabric, highly weathered (SAPROLITE)
..........
..................
Sandy Silt: Very pale brown (10YR 7/3),
...................
............. .
mottled, wet, low plasticity, cohesive, fine
grained, moderately relic rock fabric, highly
...............:\
... ...
—
weathered micaceous (SAPROLITE)
,
-
Moderate relic rock fabric with weak foliation at
--
45ftbgs
(ML)
\
.....
................:
T T
Silty Sand: Light yellowish brown (2.5YR 6/4),
...............:�
T T:
poorly graded, moist, non -plastic, cohesive,
.................
T T
fine grained, massive to weakly migmatitic,
* T:
relic rock fabric, highly weathered, infrequent
manganese filled relic fractures (SAPROLITE)
... ...
...............
"""""' '
T.
T.
Silty Sand: Light gray (2.5YR 7/2), poorly
............:::::
T T:
T T
•T•
graded, wet, non -plastic, cohesive, fine,
.................\
T T
uniformly grained, well preserved igneous
.T T
(phaneritic) texture, highly weathered diorite
(SP
T T.
(SAPROLITE)
SM)
T T;
Thin, steeply inclined, Fe -oxide stained relic
.............. `
T T
fracture present from 75-80 ft bgs
T T.
(SAPROLITE)
.................;
T T
Diorite -highly weathered (SAPROLITE), No rock
............:::::�
TT -
(PWR) fragments
• .T. T .
...................
................... ...
.TT......................
TT
............
•
'.T. T.
•.T.•
.................�
... ....
....................�
.. T.
T
Silty Sand: Olive brown (2.5YR 4/3), well
• T'
T.
graded, grained, rainedigy highly weathered,
.................\
...................
.T.
Well Cap
i
'`
Grouted 10"
surface casing
10" Sch 80 PVC
Surface Casing
tipSynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Allen Steam Station
Greenville, South Carolina 29601
synTerra Phone: [phone] PAGE i OF 6

PROJECT: Deep Bedrock Evaluation
WELL/BORING NO:
GWA-6BRL
PROJECT NO: 1026.17
STARTED: 12/13/2018
COMPLETED: 01/17/2019
DRILLING COMPANY:
SAEDACCO
NORTHING:
EASTING:
DRILLING METHOD:
Mud Rotary / Air Rotary
G.S. ELEV: 628.05
M.P. ELEV: 630.607
BOREHOLE DIAMETER:
14 3/4" / 10" / 6"
DEPTH TO WATER:
ft bgs
TOTAL DEPTH: 500 ft bgs
NOTES:
LOGGED BY:
LWD
CHECKED BY: CJS
V
6.0 ��n) r 7.0
Lq
W
w
_
a 0
DESCRIPTION
U
j
WELL CONSTRUCTION
HPF-Ambient
-0.040 �g 0.040
0
U
O.00HPF-PPu�mping0 80
(7
Tum ■
U. LL 9o.
,.T.'.
r. M. M.
I I
Silty Sand: Olive brown (2.5YR 4/3), wet, well
_
(SW
..
/.1 Z1
i��
% 1
105
T T:
T.
graded, fine to medium grained, highly
SM)....................
..
.................
T T
weathered diabase
\ ;\
TT.'
T
..................
/\
113
Meta -Quartz Diorite: Black and white, weak to
\\�\
0 IC
0
strong, medium to coarse grained, massive,
......::::::::
i
115
0
weakly foliated, slightly to moderately
..............
weathered
... ...
120
\�\
0
....................
130
0
\�\
0
... ...
..............
\�\
j
135
0
\\
0
..............
140
0
....................
.............
�\
145
0
\�\
...........::
0
::::::::::::::
150
\
..............
0
\/\
i
155
0
\�\
.............
\�\
A^A^A^
160
Diabase: Black (2.5N), strong, massive, fine
..............
..............
grained, slightly to moderately weathered
165
A A A A A A
Meta -Quartz Diorite: Black and white, weak to
............••
AAAAAn
strong, medium to coarse grained, massive,
n^A^A^
weakly foliated, slightly to moderately
170
weathered
....................
^A^A^�
n^A^A^
Diabase: Black (2.5N), moderate to strong,
i \
0
175
massive, fine grained, slightly to moderately
\
weathered
..............
180
0
Meta -Quartz Diorite: Black and white, moderate
..............
..............
0
to strong, medium to coarse grained, massive,
i
0
weakly foliated, slightly weathered to fresh
..............
i
185
Diabase: Black (2.5N), strong, fine grained,
^ ^ ^
190
massive, slightly weathered
0
..............
Meta -Quartz Diorite: Black and white, moderate
195
0
to strong, medium to coarse grained, massive,
.......•• •• •
i
weakly foliated, slightly weathered to fresh
i
Diabase: Black (2.5N), strong, fine grained,
/\
Grouted 6"
casing
6" Sch 80 PVC
Aquaguarded
2" well
2" Sch 40 PVC
tipSynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Allen Steam Station
Greenville, South Carolina 29601
synTerra Phone: [phone] PAGE 2 OF 6

PROJECT: Deep Bedrock Evaluation
WELL/BORING NO:
GWA-6BRL
PROJECT NO: 1026.17
STARTED: 12/13/2018
COMPLETED: 01/17/2019
DRILLING COMPANY:
SAEDACCO
NORTHING:
EASTING:
DRILLING METHOD:
Mud Rotary / Air Rotary
G.S. ELEV: 628.05
M.P. ELEV: 630.607
BOREHOLE DIAMETER:
14 3/4" / 10" / 6"
DEPTH TO WATER:
ft bgs
TOTAL DEPTH: 500 ft bgs
NOTES:
LOGGED BY:
LWD
CHECKED BY: CJS
V
6.0 ��n) r 7.0
Lq
W
w
_
a 0
DESCRIPTION
U
j
WELL CONSTRUCTION
HPF-Ambient
-0.040 �g 0.040
0
U
0.0ePF-PPu�mping0 80
Tw� ■
U. L. 90.
V
I massive, slightly weathered
0
Meta -Quartz Diorite: Black and white, strong,
205
0
sound rock, phaneritic
0 Ic
210
0 Ic
Ic
215
0 Ic
220
0
0 Ic
225
0
0 Ic
230
0 Ic
0 Ic
235
0 Ic
0 Ic
240
0
Ic
245
0 Ic
250
0 Ic
255
0
O Ic
260
0 Ic
O
265
0
O Ic
270
0
O Ic
275
0 Ic
Ic
280
0 Ic
285
0
O
290
0
AAAAAA
Diabase: Dark greenish gray, strong, sound
295
n^n^n^
rock, aphanitic
Potential fracture noted at 292 ft bgs
Bentonite seal
Sand pack
2" well screen
tipSynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Allen Steam Station
Greenville, South Carolina 29601
synTerra Phone: [phone] PAGE 3 OF 6

PROJECT: Deep Bedrock Evaluation
WELL/BORING NO:
GWA-6BRL
PROJECT NO: 1026.17
STARTED: 12/13/2018
COMPLETED: 01/17/2019
DRILLING COMPANY:
SAEDACCO
NORTHING:
EASTING:
DRILLING METHOD:
Mud Rotary / Air Rotary
G.S. ELEV: 628.05
M.P. ELEV: 630.607
BOREHOLE DIAMETER:
14 3/4" / 10" / 6"
DEPTH TO WATER:
ft bgs
TOTAL DEPTH: 500 ft bgs
NOTES:
LOGGED BY:
LWD
CHECKED BY: CJS
V
6.0 ��n) r 7.0
Lq
W
w
_
a 0
DESCRIPTION
U
j
WELL CONSTRUCTION
HPF-Ambient
-0.040 �g 0wn).040
0
U
■
00ePF-PPumping0.80
Lu
p�
.Tw� ■
U. L. 90.
305
310
315
320
325
330
335
340
345
350
355
360
365
370
375
380
385
390
395
V
Meta -Quartz Diorite: Black and white, strong,
sound rock, phaneritic
..
__%%�.
_
_....................
..............
............
::: Sand backfill
Bentonite
backfill
/N/N/`
`
\/\/\/\
n^n^n^
O
Diabase: Dark greenish gray, strong, sound
rock, aphanitic
Potential fracture noted at 305 ft bgs
n^n^n^
0
O C
Meta -Quartz Diorite: Black and white, strong,
sound rock, phaneritic
..........••••
..............
.................
............
:::' .....
Diabase: Dark greenish gray, strong, sound
rock, aphanitic
Meta -Quartz Diorite: Black and white, strong,
sound rock, phaneritic
^"^"^"
0
0
0
0
0
0
0 4C
0
0
0
Diabase: Dark greenish gray, strong, sound
rock, aphanitic
..........
. ..........
....................
Meta -Quartz Diorite: Black and white, strong,
sound rock, phaneritic
...
.....
...........
..............
.. ...
0
0 C
0
04C
0 Ic
0 Ic
0
0 Ic
Meta Quartz Diorite: Black and white, strong,
sound rock, minor green and pink
mineralization, phaneritic
Abundant pink mineralization at 378 ft bgs
..............
:::::...
......... ..
W"
^ ^ ^
Diabase: Dark greenish gray, strong, sound
rock, aphanitic
0
0 <C
0<Cmineralization,
..............
.................
Meta -Quartz Diorite: Black and white, strong,
sound rock, minor green and pink
phaneritic
..............
tipSynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Allen Steam Station
Greenville, South Carolina 29601
synTerra Phone: [phone] PAGE 4 OF 6

PROJECT: Deep Bedrock Evaluation
WELL/BORING NO:
GWA-6BRL
PROJECT NO: 1026.17
STARTED: 12/13/2018
COMPLETED: 01/17/2019
DRILLING COMPANY:
SAEDACCO
NORTHING:
EASTING:
DRILLING METHOD:
Mud Rotary / Air Rotary
G.S. ELEV: 628.05
M.P. ELEV: 630.607
BOREHOLE DIAMETER:
14 3/4" / 10" / 6"
DEPTH TO WATER:
ft bgs
TOTAL DEPTH: 500 ft bgs
NOTES:
LOGGED BY:
LWD
CHECKED BY: CJS
V
6.0 ��n) r 7.0
Lq
W
w
_
a 0
DESCRIPTION
U
j
WELL CONSTRUCTION
HPF-Ambient
-0.040 �g 0.040
0
U
0.0ePF-PPu�mping0 80
Tw� ■
U. L. 90.
0
...............��
.....
Aquaguard
405
0
:::
%N N backfill
0
... ::
410
0
::::::�..:::
415
0
..........
Diabase: Dark greenish gray, strong, sound
420
""'"""
0
rock, aphanitic
Meta -Quartz Diorite: Black and white, strong,
425
0
0
sound rock, minor green and pink
..........
mineralization, phaneritic%%%
430
0
Pink mineralization dominant at 449 ft bgs
...........
0
..............
435
0
....................
440
o
0
41
�j�j�j
445
.................
..........
::
11
450
0
............
....................
nAnAnA
nnnnnn
Diabase: Dark greenish gray, strong, sound
rock, aphanitic, olive green clasts present
455
:: .......
460
AA
-
��
.......
.........
0
Meta -Quartz Diorite: Black and white, strong,
...............
sound rock, minor green and pink
�������
0
mineralization, phaneritic
465
0
Little to no mineralization from 475 to 480 ft
bgs...
470
0
�il
0
...
475
0
0
::::::::::::::
480
0
..............
... ...
485
0
....................
0
....................
490
0
0:::::
/-\
495
IL
A A
0
Diabase: Dark greenish gray, strong, sound
.........�...
rnn
rock, aphanitic
i i i
tipSynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Allen Steam Station
Greenville, South Carolina 29601
synTerra Phone: [phone] PAGE 5 OF 6

PROJECT: Deep Bedrock Evaluation
WELL/BORING NO:
GWA-6BRL
PROJECT NO: 1026.17
STARTED: 12/13/2018
COMPLETED: O1/17/2019
DRILLING COMPANY:
SAEDACCO
NORTHING:
EASTING:
DRILLING METHOD:
Mud Rotary / Air Rotary
G.S. ELEV: 628.05
M.P. ELEV: 630.607
BOREHOLE DIAMETER:
14 3/4" / 10" / 6"
DEPTH TO WATER:
ft bgs
TOTAL DEPTH: 500 ft bgs
NOTES:
LOGGED BY:
LWD
CHECKED BY: CJS
Caliper(
CJ
6.0 7.0
W
i+
CL
_ 0
Q 0
DESCRIPTION
� >
O F
j
WELL CONSTRUCTION
HPF-Ambient
-0.040 (9 ) 0.040
W
U
O.OePF-PPuumpin90.80
Q
(g�)
o. LL go.
Meta -Quartz Diorite: Black and white, strong,
sound rock, minor green mineralization,
phaneritic
SynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Allen Steam Station
Greenville, South Carolina 29601
SynTerra Phone: [phone] PAGE 6 OF 6

GROUNDWATER WELL DEVELOPMENT
DUKE ENERGY PROGRESS, INC
0
synTerra
148 River Street, Suite 220
Greenville, South Carolina 29601
[phone] . [phone] Fax
www.synTerracorp.com
WELL DEVELOPMENT LOG
WELL ID: �#- loog,
MEASURING POINT:
TOC
WELL DIAMETER:
2 IN
WELL DEPTH:
(FT)
DEPTH TO WATER:
(� (FT)
FIELD PERSONNEL:
WEATHER: X SUNNY ❑ OVERCAST ❑ RAIN TEMPERATURE (APPROX): Z, F
NOTES:
START DEVELOPMENT TIME/DATE: I .t I lm r I %
END DEVELOPMENT TIME/DATE: 3
TOTAL VOL PURGED:
DEVELOPMENT METHOD: ❑ Grundfos Pump ❑ 12 Volt Pump ❑ Polyethylene Bailer
DATE
TIME
VOL
TEMPERATURE
DO
CONDUCTANCE pH
(AS/CM) (su)
ORP"
TURBIDITY'
NOTES
(° Celsius)
(mg/L)
(mV)
(NTU)
2t
Zak
� 3�
g•N�
aH�
�
'S"10
�• �
)zlo
\A
1�
L4.70
-401
4 0 -1-
.31
IZISr
\" for
CL
720
tizo
-41"40
16
q, 91,
1 z<
, IT
- 3
70
3 `i
3, (P
A#-r
i2 3V
n
q. -?at
tj ID
5D
,D 73
S
'iCb
44ce
i
COMMENTS: FIELD VEHICLE ACCESSIBLES ❑ NO
Associated midday/end-of-day DO, conductivity, pH within range? (See calibration sheet for this sample date) ❑ YES ❑ NO.
If NO, which parameter . NOTE that reported data should be considered as flagged accordingly,
' SynTerra is not NC -certified for these parameters. Data collected for information purposes only
-- WELL TAG P TECTIVE CASING LOCK CAP CONCRETE PAD
GOOD I ❑ BAD ❑ NONE GOOD BAD ;: ❑NONE 1 GOOD 9A❑D ❑NONE FOOD ❑BAD '❑ NONE GOOD € ❑BAD :€ ❑NONE
I 11 III
st
ti
P:IDuke Energy Progress. 1 026\00 FIELD PAPERWORMWell Development Log.doc

GROUNDWATER WELL DEVELOPMENT
DUKE ENERGY PROGRESS, INC
10
synTerra
148 River Street, Suite 220
Greenville, South Carolina 29601
[phone] . [phone] Fax
www.synTerracorp.com
WELL DEVELOPMENT LOG
FIELD PERSONNEL: k
WEATHER: Le SUNNY ❑ OVERCAST ❑ RAIN TEMPERATURE (APPROX05 F
WELL ID: �` 'A - 4 VIAL
MEASURING POINT: TOC
WELL DIAMETER: 2 IN
WELL DEPTH: (FT)
DEPTH TO WATER: —7 (FT)
NOTES:
START DEVELOPMENT TIME/DATE:
END DEVELOPMENT TIME/DATE:
TOTAL VOL PURGED: l'
DEVELOPMENT METHOD: ❑ Grundfos Pump ❑ 12 Volt Pump ❑ Polyethylene Bailer = A-f'
DATE
TIME
VOL
TEMPERATURE
(° Celsius)
DO
CONDUCTANCE
pH
ORP'
TURBIDITY"
NOTES
(mg/L)
(AS/CM)
(su)
(mV)
(NTU)
2 Y T
z
711
1 %
tS
C5'
&/2
J
. -D�
z
Zq
D
z
Z3
I AD
1-% f
T
l
1
I�t�
-1.z�
��
,1
2 ,
140)
1. 1
Z�H
�&Ib
Ji
COMMENTS: FIELD VEHICLE ACCESSIBLE ,YES ❑ NO
Associated midday/end-of-day DO, conductivity, pH within range? (See calibration sheet for this sample date) ❑ YES ❑ NO.
If NO, which parameter . NOTE that reported data should be considered as flagged accordingly.
SynTerra is not NC -certified for these parameters. Data collected for information purposes only
WELL TAG PROTECTIVE CASING LOCK CAP CONCRETE PAD
......... -- ............. ... ............................... --- ...................
P1Fi00D ❑BAD El NONE :.GOOD ❑ BAD ❑ NONE GOOD BQ ❑ NONE GOOD [IBAD ❑ NONE FOOD ❑BAD ❑NONE
P:IDuke Energy Progress.1026\00 FIELD PAPERWORKIWell Development Log.doc

GROUNDWATER WELL DEVELOPMENT
DUKE ENERGY PROGRESS, INC
,�Ap
synTerra
148 River Street, Suite 220
Greenville, South Carolina 29601
[phone] . [phone] Fax
www.synTerracorp.com
WELL DEVELOPMENT LOG
WELL ID: <i� w
MEASURING POINT: TOC
WELL DIAMETER: 2 IN
WELL DEPTH: (FT)
DEPTH TO WATER: <jIS" (FT)
FIELD PERSONNEL: I'vj y
WEATHER: JkSUNNY ❑ OVERCAST ❑ RAIN TEMPERATURE (APPROX): 41a F
NOTES:
START DEVELOPMENT TIME/DATE: It) Crib
END DEVELOPMENT TIME/DATE: 415s1--
ZaTOTAL VOL PURGED:1
DEVELOPMENT METHOD: ❑ Grundfos Pump ❑ 12 Volt Pump ❑ Polyethylene Bailer
DATE
TIME
TEMPERATURE
I' Celsius)
�.
.
�..
COMMENTS: FIELD VEHICLE ACCESSIBLE ❑ YES ❑ NO
Associated middayleld-of-day DO, conductivity, pH within range? (See calibration sheet for this sa pte date) ❑ YES ❑ NO.
If NO, which parameter . NOTE that reported data should be considered as flagged according(y.
` SynTerra is not NC -certified for these parameters. Data collected for information purposes only
WELL TAG
PROTECTIVE CASING
LOCK
CAP
CONCRETE PAD
OOD ❑ BAD [I NONE
r7, �OOD ❑ BAD i _
T - ❑NONE
—
..�.....�
GOOD 1 ❑
BAD
.. ...—.._....j ........._....................
..
j ❑NONE ❑
1
.
OOD ❑ BAD
f ..�....!................._—......_.,,._..:::...
❑ NONE L�OOD
❑ BAD [I NONE
'
r
P:1Duke Energy Progress.1026100 FIELD PAPERWORKIWell Development Log.doc

GROUNDWATER WELL DEVELOPMENT DUKE ENERGY PROGRESS, INC
410
synTerra
148 River Street, Suite 220
Greenville, South Carolina 29601
[phone] • [phone] Fax
ww W. synTe rracorp. corn
WELL DEVELOPMENT LOG
�
FIELD PERSONNEL: iV1,G� 1
WEATHER: ❑ SUNNY OVERCAST ❑ RAIN TEMPERATURE (APPROX): y'ID F
NOTES:
WELL ID:
&-. nt. START DEVELOPMENT TIME/DATE:
b qhq �
MEASURING POINT:
TOC
END DEVELOPMENT TIME/DATE:
WELL DIAMETER:
2 IN
TOTAL VOL PURGED:
I
WELL DEPTH:
Z00-4' (FT) _ L�
(9 (•.k d
DEPTH TO WATER:
(FT)
DEVELOPMENT METHOD: ❑ Grundfos Pump
❑ 12 Volt Pump ❑ Polyethylene Bailer
MO
N
TEMPERATURE
�•
f 1VI
E
E�V�
Fmii�
-'
A
-
1L9jLQ7V
MMM
ff=1
La ii
COMMENTS: FIELD VEHICLE ACCESSIBLE ❑ YES ❑ NO
45- - a1-4 IS Ip
Ills � zl� � 1-1 'T,nY
Associated midday/end-of-day DO, con uctivity, pH within range? (See calibration sheet for this sample date) ❑ YES ❑ NO.
If NO, which parameter . NOTE that reported data should be considered as flagged accordingly.
" SynTerra is not NC -certified for these parameters. Data collected for information purposes only
WELL TAG PROTECTIVE CASING !_ LOCK CAP CONCRETE PAD
GOOD ❑BAD _ ❑NONE GOOD € ❑BAD ;_ ❑NONE € OOD = _ ❑NONE OOD ❑BAD ❑NONE �'>;OOD ❑BAD ❑ NONE
lBAD
P:IDuke Energy Progress. 1 026\00 FIELD PAPERWOftftl Development Log.doc

GROUNDWATER WELL DEVELOPMENT
DUKE ENERGY PROGRESS, INC
WnTerra
148 River Street, Suite 220
Greenville, South Carolina 29601
[phone] . [phone] Fax
www.synTerracorp.com
WELL DEVELOPMENT LOG
FIELD PERSONNEL:
WEATHER: SUNNY ❑ OVERCAST ❑ RAIN TEMPERATURE (APPROX): "3�c; ' F
WELL ID: l
MEASURING POINT: TOC
WELL DIAMETER: 2 IN
WELL DEPTH: .0 I IFTy
DEPTH TO WATER: ( (FT)
NOTES: jNtaJirr W / �CSdZ
START DEVELOPMENT TIME/DATE: C7I
END DEVELOPMENT TIME/DATE: of 50 y
TOTAL VOL PURGED:
DEVELOPMENT METHOD: ❑ Grundfos Pump ❑ 12 Volt Pump ❑ Polyethylene Bailer �(NRI bflk vRt*NT
DATE
TIME
VOL
TEMPERATURE
DO
CONDUCTANCE
pH
ORP"
TURBIDITY"
NOTES
(° Celsius)
(mg/L)
(PS/CM)
(su)
(mV)
(NTU)
0 3u
ly
0
6
r 8
f"k,"Ve c,)0M
z
f�
- r
--,io
-'y kong
1
COMMENTS: FIELD VEHICLE ACCESSIBLE O YES ❑ NO
Associated midday/end-of-day DO, conductivity, pH within range? (See calibration sheet for this sample date) ❑ YES ❑ NO.
If NO, which parameter . NOTE that reported data should be considered as flagged accordingly.
" SynTerra is not NC -certified for these parameters. Data collected for information purposes only
WELL TAG
PROTECTIVE CASING
OOD ❑ BAD ❑ NONE
LOCK
CAP CONCRETE PAD
GOOD I ❑ BAD [INONE OD ClBAD ❑NONE
❑ GOOD ❑ BAD I NONE
GOOD
❑ NONE
I I
)
im
P:1Duke Energy Pmgress.1026100 FIELD PAPERWORKIWell Development Log.doc

WELL CONSTRUCTION RECORD
Thy fOrn S-0n be used FK Single 9r m0l iuk wells
1. Wdl Cantractor Informallon:
Robert Miller
1W01 -Con4n IDT tia nw
2675
NC Well Conlr.morCerlifwMionNiullber
SAEDACCO Inc
{'mlllkui} Nan1C
2, Wtill C',0H%tFVCti0H PergPit ff
List Lffl d7pp6 aWr 16ellpl'rllnrs t1_'. Cf1YIlh'_ .52dw, Yariunre, ffWGR rjr.0
3, Wv1l Use (chccl, w0l u red:
MAIg,Timulturifl DMlmicipaVFtrblic
DGeaihemtal tHeati kKoclirlg Apply) OResidenfial WaluSupph' (single)
DI1KfUSnia1fC0mmerc1ial DRcsideniiial Waler 5upph: (shared)
❑lrri tion
NON-;' stff Supfrl}' Well:
5ahlpnilorin.4 ❑RCcrr3 Ca}'
[]Aquifer RCCha%6
13Agtlifcr Storage aTxJ RCC4%v7
❑Aquifer T
11Ex4p dnLrn4111 TrxhnOLpg.%-
❑Geodlernml 1Closed Limp)
❑GmElrennal McAn eCboline Rewn11
❑GroUndvr'Alcr 1RC1114C1i714ian
❑Salinity Haniu
❑540rrm ai;gr E"Lnagc
❑TrauT
❑011ier 4e9rtllain under #21 1
4.114te 1J4'rll(s) Conrpleltvl; 10-24-2018 tVs�ll 1Dff AB-l0BR
Sa_ %`tdl 1.1watilln.
Allen Steam Station/Duke Energy
Facility-'0n-. rr Nonce 1-aciliw TVA! of applicnblel
253 Plant Allen Road , Belmont, N.C., 28012
Phrsi--d Addles_ City- and Zip
Gaston
C"My 1'.jKel IdCfllif" ivri No. (PIN)
5b,1ji ituds ilwl Lnngitoliv in tivgreerlmiFwtcs+rccontlF. nr decimal dcgrci's:
Qrmr,11 field. 1nk: 1;dbli tg is milk kmll
T1 }}'
6.Is 1A1vl the welllsk 50R'cnnAM!n1 or 7Temporary
7. is thin a reimir to an existi.olg: wrell. Flex Ilr ®Nu
f/fhfs Jx rr fgmir, fly4,or trn"m 1-dit+ fnnfri*ra elrloraweWai 4md expfabi rAe ewnwre of rAr
repair under AIL remurl'.s.ree'aiam m on the ixrl'f of rJdr form.
13.11umhcrof wills touellrurtrtd: 1
for lrtkke(le jrtfeer"i of rofx1-wbrer srVph- aeth ONLY mrh My slraeraor sP%wfk*. teal [ei0
salbrirrme foral.
9. Totid wt11 depth belim lard surfiam 160' (.)
formllfrrXJr wrfh 1fsr-fWA-fubr ffEf0-emf1e.y(wwfe-3@ZM' al.1d 2@Jfhfx)
1 U. Stair weer levri below tup. of carsiug: (fiJ
If mioefi fir, d es Awe ivafrag_ ilnr' "+ "
1 I. Bmrhille diamrrcr: 6" , 14" (ilL)
12, WCjj cantilrneti0rr nllothod• 6" Air Hammer, 14" Mud Rotary
4i.e. allptr. carol}', cable_ diced pushLre.)
FOR WATER SUPPLY WELLS ONLY.
13a, Vidd (qm) Mc111od of test'
13b. bimnRcriun npe- Amount:
For rrKrnlal 4rso ON Ly:
DESCHCPI ION
]:+.OUTER CAS [for mull! -royal vwlsl OR LIKER{i asokabkS
0 fi.
78' fL
10" in,
SCH 80
PVC
i6. INNER CALSI NG OR I 'n ING I2MAL-rvr Yl c
iAOA
if
PLIOEF.TE:k
TAFCKNCffi
MATTUAL
0 ft.
140' FL
6" "L
SCH 80
PVC
0 Ito
150, fti
2" �k
SCH 40
PVC
I 150'ft� 1160' (1, 12" iR 0.10 I SCH40 I PVC I
rL ft. ia.
0
ft
1 78'
fL
Portland/Be#aLneaikare
Grout
0
4.
140'
r4,
Portland/ Bel3atessiftee Grout
04
fL
if le
MSA.Nrxll6Ri4VELPACK
FROM
11)
'AATPRU3.
rf!AP'3A[TAIFAT MVTllrin
148'
(L
160'
ft,
Silica Sand
20/30
i
ft.
ft.
Eight feet bentonite seal from 140'to 148' 1
22, ('errifiraWrn:
11/1/2018 _
By ]ignmg afro fwae, F here -y Lwjr 4' roar Me we 4mo w y (wemi cxmsrnri'rea is a xvrdm c[
1L'arlt f SA JVCAC OTC .0f00 Pr f iA NCAC UC ,0 Weti Czmfrwr cn Sfandafda 4vO rfllu iT
"y of rAir remFd brab m Iwm'irfrvf ra Abe ,Ir44 �rwwn
23, She diawh tam or addMonal well drfaits:
You rnmy ,rse tile back of this page to provide atldifional wdl site debits Or well
WMISJ311rdUrl derails. You rrr3,' also aillach addilicmat pages if uecessan .
SURNIMAL INSTUCTIONS
24a. Pqr All Wrilx: Subniii 111os faro) williin 0 days of complerioo of well
Con5lnlctipn to 4hc following-
birWun of WAtcr 1C[rraurc[s, Informatiou Proccsuiog, Unit,
1617 Mail 9crsire {:enter, Raleigh, XC 17699-1617
tab. For Iniectios Weill ONLY: In addiuoll [o sending 4he form to e1w address in
24a above. also submit a cop of this farm within zd days of caniple[ioik of twll
conSIMULiarl [o [Ile f00CnVi1lg:
Dh-ision dWAler RemmreeN.lrllderpvund Injeciioll Control Program,
1636 Mail Srrvilx'Center. RrilelGh, NC 27699-1636
25r, For W4W SR der In"gtrillo W►' ft
Also submit One copy of this folnl Ntiithin 30 days ofconrpleil ion of
wdl cnoslnrctian to the ¢rnmry health depurmprrt of the crr1uay when:
consriuCtad
Forlri OW-L Nonh Carol Ira D jarinriu aF Ern 3lulrnlrlu aid NarllrW Rtisoluccs - Dii rs roe of Woor Ravin Rt, Iscd ALIg1St 2013

WELL CONSTRUCTION RECORD
Thh fOrnl S-0n be used FK 5i ngk 9r m0l iuk wells
1. Wdl Cantractor Infurmallon:
Robert Miller
W01 -Con4n IDT tia nw
2675
NC Well Conlr.morCerlifwMionNiullber
SAEDACCO Inc
{'mlllkui} Nan1C
2, Wtill f0n%tFVCti0H PergPit �f
List Lffl d7pp6 aWr 16ellpl'rllnrs t1_'. Cf1YIlh'_ .52dw, Yariunre, ffWGR rjr.0
3, Wv1l Use (chccl, w0l u ale):
MAIg,Timulturrll DMlmicipaVFtlblic
DGeaihemtal tHeati kKoclirlg Apply) OResidenfial WaluSupph' (single)
DI11dus4ria1fC0mmerc1ial DResideniiial Waler Supph: (shared)
❑Irri tion
Nom-;'TI`atff Suy Well:
phlpnilnr4i.z ❑RCcrr3 Ca}'
QAglrifcr Rccha%c
13AgllikF Storage Aud RCC4',v7
❑Agllifcr T
11Ex4p dnLrn4111 TrxhnOLpg.%-
❑Geodlernml 1C'Iosed Limp)
❑GmElrennal M eAnneCboline Rewnsl
❑GroUndvr'Alcr 1RC1114C1i714ian
❑Salinity Darriu
❑540rrm ai;gr E"Lnagc
❑TFacrr
0011ier i!Mlaifi fflOu1 -" t I
4. Dias 1J4'rll(s) Conrpletcd; 1-19-2019 WLI1 RDo AB-10BRL
so- %`tdl 1.1watilln.
Allen Steam Station/Duke Energy
Facility-'0n-. rr Nonce 1-aciliw TVA! of applicnblel
253 Plant Allen Road , Belmont, N.C., 28012
Phrsis-d Address_ City- and Zip
Gaston
,,,"My 1'.jKel IdCnlff" ivri Na fPl^1}
5b,1ji ituds ilwl LnngitaliC in llCgmrlmiFwtcs+scci)nlls nr decimal degrci's:
Qrmr,1l fidd. 1nk: LW ing 3s milk kmll
T1 }}'
6. Is h alv1 the welllsk 5OPer-ma lent o r 7Temporary
7. is thin a repair to an exisvtn : weed. Flex Ilr ®Nu
f/fhfs Jx rr fgmir, fly4,or trn"m 1-dioxt+ fnnrichu elrlorrwrWai 4md expfabi rAe ewnwre of rAr
repair underAlL mrourl•.s.rre•Jiare of on the ixrl•f of efibe orm.
13.11umhcrof wills touellrurtrtd: 1
for lrtkke(le ark,ecr"i of rofx1-wbrer srMh- aeth ONLY mrh My slraeraor sP%wfk*. }%,4 [ei0
salbrirrme foral.
9. Totid TFt11 depth belim lard surfiam 219' (.)
FoFm11frlX4e weth Ifsrrrffdrfu f ffdOfemfl r(np3pfe- @ZM' al.1d 2@Jfhfx)
1 U. Stair weer levri below hrp of casing: (h1.I
If mioefi Ir, d es Awe ivafrag_ i3nr' "+ "
11. Bmrhille diamrrcr: 6" , 14" (ia)
12, WCjj canl<lrneti0rl nlethod• 6" Air Hammer, 14" Mud Rotary
4i.e. allptr. regal}', cable_ diced pushLre.)
FOR WATER SUPPLY WELLS ONLY.
13at, Vidd (qm) Mc111od of test'
13b. bimnRclian npe- Amount:
For rrKrnlal 4rso ON Ly:
DESCHCPI ION
ft. fl,
]:+.OUTER CAS [for mull! -royal vwlsl OR LIKER{i asokabkS
0 fL.
50' fL
10" in,
SCH 80
PVC
i6. INNER CALSI NG OR I 'n ING I2MAL-rvr Yl c
iAOA
if
PLIOEF.TE:k
TATCKNEffi
MATTUAL
0 ft.
201' FL
6" "L
SCH 80
PVC
0 Ito
208' rti
2" �k
SCH 40
PVC
208'ft� 1 218' (1• 2" rR 0.10 rSCH40 PVC
R it ia.
i41. c1�auT
FROM TO MATEMAL I EMPL&CEMLN'T SIET1101P d AMOUNT
0 ft 51' rL Portland/Be aikare Grout 10"
0 4. 202r4, Portland/ BePitesd&ee Grout 6"
0 04 203' fL Aqua Guard pressure Grout
VR4111 j 10 MILTFRIA3. 1?f!AF3.A[-T-.N1E'4 MVT1113Tk
206' Or 221' A, Silica Sand 20/30
i ft. ft.
221 (L
225 fL
Bentonite
225 fL
500 ft,
Aquaguard
ft,
rL
fL
fL
r4
rt,
IZ.
fr.
Tx,
rr,
Three feet bentonite seal from 203'to 206' 1
22, CrrrifiraWrn:
} 1/19//2019
SiGlulrllcaf'::s::.;" :��F dale
By ]ignmg afro fwae, F herek-y LrFio— hour Me we 4mo w y (wrmj cxmsrnri'red is ff xwrdm c[
1L'arlt f SA JVCAC 02C .0f00 Pr I iA NCAC UC ,0 Weti CzmfrrKr cn Sfandafda 4vO rfpu iT
"y of rAir remFd ire' b m Iwm'irfrvf ra Aw ,Irlf �rwjwn
23, She diawh iam or addMonal wdl drfaits:
You rnmy arse t31e back of this page to provide addifional wdl site debits Or well
WMISJ311rdUrl delails. You rrr3,' also aillach aLddilicmat pages if uecessan .
SUBNIMAL INSTUCTIONS
24a. Eqr All Wrilx: �ubnli4 111os faro) williin 0 days of complelioo of well
Con5lnlctipn to 4hc fnllouing-
birWun of WAter krNraurc[s, Informatiou Proccsuiog, Unit,
1617 Mail 9crsire {:enter, Raleigh, XC 27699-1617
tab. For Iniettias Weill ONLY: In addifioll [o sending 4he fom to t1w address in
24a above. also subtllit a cop of 1:10r, farm within zp days of caniple[ioll of twll
conSIMULiarl [o [Ile f00a„'i1lg:
Dh-isiotl d WAter RemmreeN.lroderpaund Injeciioll Control Program,
1636 Mail Srrvilx'Center. RrilelGh, NC 27699-1636
25r, For V j4W SR * In"gtrillo W4' ft
Also submit One copy of this folnl Ntiithin 30 days ofconrpleil ion of
wdl cnoslnir:tian to the ¢rnmry health depurmpnt of the crr1uay when:
CVFW UCtW
Forlri OW-L Nonh Carol Ira D jarinriu aF Ern 3lulrnlrlu aid NarllrW Rtisoluccs - Dii rs roe of Woor Ravu1!�' Rt, Iscd ALIg1St 2013

WELL CONSTRUCTION RECORD
Thh FOrn S-0n be used FN 5i ngk 9r m0l iuk wells
1. Wdl Cantractor Infurmallon:
Robert Miller
W01 -Con4n IDT tia nw
2675
NC Well Conlr.morCerlikoLionNinikber
SAEDACCO Inc
{'Mikpui} Nan1C
2, Wtill CUH%tFVCtign Psr•geit �f
List Lffld7 p6 aWr 16ellpl hies tr_'. Cfwjlf-,S3urr, Yariunre, ffWGR rjr.0
3, Wv1l Use (chccl, w0l u ney
For rrworilal 4rso ON Ly:
DESCRIFI ION
rt
p,
]�OUT&CIRCASMG [For mull! -royal vwlsl OR LIKE R(if sionkahkS
0 fiL
147' k
10" io.
I SCH 80
PVC
Ub INNER CALSI NG OR I 'RING 42MIlkrvral c
FROM
if
PLIOEF.TE:R
7TirCItNCffi
MArFuAL
0 ft.
212' FL
" 6" -
SCH 80
PVC
0 Ito
462' f4
2" iiik
SCH 40
PVC
I]AlgxistilCLlftE
DGeotheimtal OHeali kKooring Supply)
DI1KfUS rialfCommercial
❑lrri tion
I�1rllmlclpallFttblic
DResidenlial WaluSupph' (single)
DResideniiial Walu Supph: (sharod)
4621ft�
472' (1•
2" iR
0.10
SCH40
PVC
't-
ft
is
J9.CMUT
FROM
TO
MATERIAL
EMPL &CEML 'T SIET1101P d
0 ft
145' fL
Portland/Be
sikare Grout
Noe-Wswr 9tlpj Well:
Mk1pni1orin4
❑RCcp3
0 0.
213' r4,
Portland/ BeAtessitoee Grout
Iriloci Ion WuLl
0 04
380' R,
Aqua Guard
pressure Grout
QAglrifcrRCchmp ❑Gr0Undvr'AICFRC1k"ia4i4n
Storage and Roca; ❑5&linit} H mCr
❑Aquifer T" ❑540rrm atCr E"Lnaq;
❑ExEcri;rrrcn4Rl Tq�hnOLp�❑51ia5;dkllcc {'olyTpl
❑Geoilrernlol 1C'losed Limp) ❑Trdcrr
❑Gmdrenual ft!Awi •'Cboline Rrwnsl 00111er ilex in u20ui 121 Rrrnarkm)
19LSA.NOfGRJk
VIM PACK(if
ie
lr]
17A7PRLA7�pAa�lrifcr
Ffl
473' rt,
Silica Sand
20/30
fr,
If. DR11LLIDFG
4314aeh
aldlli4One13heelw if met' 4lry
FROM
TU
nF'.ti[ ItEP71f}\ it,thr, hMrdns'n, r il'nn'L 1 R
fit-
H.
-t. Djtte w 0j' (s) C0nrplettvl; 1-30- 2019 wLjj TDv GWA-3BRL
so- k eI1 l.Iacatilrnr
Allen Steam Station/Duke Enery
Facil�IrYn. r Maila I-acilily TVA f4Fapplicnblel
253 Plant Allen Road , Belmont, N.C., 28012
Physical Address_ City- and Zip
Gaston
f:4pmr 1'jRel IdCnisf" iun No fPl^1}
fr.
rt,
R,
rL
fL
rt
fi
Fr
fa,
F11
11- R- MARKS
Bentonite seal from 380'to 458'
id. Lmitmx ilnd 1.nngatpliv in gkXiixwinrrrytCl wconds or LtcCrmill degrCi's:
Qrmr,1l held. 1nt Ldblimg is xldlickmll
T1 }}'
6.Is iarri flip well1sk 5M-nnanent or ❑Temporary
7. is thin a repair to an exist n%weed. Flex Irr 19 Nu
f/fhfs rx rr fgmir, f+y,,wr trn"m 1-di oxt+ fan riche eirlorr,wWai 4md expi'abi rAe ewnwre of rAr
repair under All remurky.yrx'aiam mein the r5cul of efibe fo Fm.
S. l�umhcrof wills toueltrurtrtd: 1
for 1rtkke(le ark,ecr7wi of r1rvi-warer mph- 4efls ONLY mrA die seaeraor sP%wAw. }%,4 [aid
aabmirrme foray.
9. Totid wt11 depth belim lard surface* 472' (.)
FoFm1lfrlpie wetk IfsrrrffA-f. f rjdOfemfl y( wfe-?@ZM' amd 2@lfhfr)
1 U. Stair weer levri below hrp of caisiuey (fl.l
If mirrfi Ir, d es Awe ivafrag_ dj;e "+ "
11. Bmrhirle diamrrcr: 6" , 14" (ia)
12, WICII canfilrnetiorl rnbthod• 6" Air Hammer, 14" Mud Rotary
4i.e. a11-,Lzr. miwy, cable_ diem pushLre.)
FOR WATER SUPPLY WELLS ONLY.
13a, Vidd (dual) Mc1hrid of test'
13b. DimnRclian npe- Amount:
22, Crrtirratian:
} 1/30/2019 _
SiGlulrllcaf'::s::.;" :��F dale
By ]ignmg afro fwae, F herek-y LrFio— hoar Me we 4mo w y (wrmj cxmsrrui'red is a xvrdm c[
1L'arlt f SA JVCAC OTC .0f00 yr i5AJVCACUC.02MWetiCzmfrrKrfcnSfandads4vOrAwx4T
r+'L']r alrfliT rrr,+rd biudx ew Iwm'irdr•d ra r�b• ,Irlf �+wx�r,
23, She diawh am or addMonal wdl Ilefaiii:
You may ,rse tire back of this page to provide additional wdl site debits Or well
WMISJ311rdUrl delails. You iflay also aUach addilicmat pages if uecessan .
SUBNIMAL INSTUCTIONS
24a. Eqr All Wells: Subaru! 111os faro) williin xU days of compkiioo of well
con5lnlctipn to the following-
Dili-Wun of WAtcr krNriurc[s, Informatiou Proc"*iing, Unit,
1617 Mail Sersire {:enter, Raleigh, XC 27699-1617
tab. For Inimflos Wells ONLY. In addition [o sending Me form to t1w address in
24a nbm'e. Also submit a cop of this farm within zp days of cDnlp-lekiI of twll
corISUOULiarl [) [Ile f00CnVi1lg:
Dh'isioll dWAler RemmreeN.lrilderpvund Injeciiom Control Program,
1636 Mail Srrvilx'Center. Raltith, NC 27699-1636
25r, For V j4W SR der [n-gtrilln V4' ft
Also subnlit One copy of this form Ntiithin 30 days of conrp4eil ion of
wdl cnoslnir:tian to the ¢rnmr; health drparroat= of the rrminry whom
corrs4rtactad
Form OW-L Nonh Carol Ira 0.jari11ri1E aF Ern 3Iulrnke u aid NicaW 7i:&w uccs - Dii rs roe of Woor Ravin Rt, Iscd ALIg1St 2013

WELL CONSTRUCTION RECORD
Thh fOrnw S-0n be used FK 5i ngk 9r m0l iuk wells
1. Wdl Cantractor Informallon:
Robert Miller
1W01 -Con4n IDT tia nw
2675
NC Well Conlr.morCerlifwMionNiullber
SAEDACCO Inc
{'mlllkui} Nan1C
2, Wtill C',0H%tFVCti0H PergPit ff
List Lffl d7pp6 aWr 16ellpl'r]Rlrs t1_'. Cf1YIlh'_ ,53urr, Yariunre, ffWGR rjr.0
3, Wv1l Use (chccl, w0l u red:
MAIg,Timulturrll DMlmicipaVFtrblic
DGeaihemtal tHeati kKoclirlg Apply) OResidenital WaluSupph' (single)
DI1KfUSnia1fC0mmerc1ial DResideniiial Waler 5upph: (shared)
❑lrri tion
Nom-;'TI`atff Suy Well:
phlpnilnr4i.z ❑RCcrr3 Ca}'
QAglrifcr Rccha%c
13AglrikF Storage aTxJ RCC4%v7
❑Agllifcr T
11Ex4p dnLrn4111 TrxhnOLpg.%-
❑Geodlernml 1Closed Limp)
❑GmElrennal M eAnneCboline Rewnll
❑GroUndvr'Alcr 1RC1114C1i714ian
❑Salinity Darriu
❑540rrm ai;gr E"Lnagc
❑TFacrr
0011ier ilMlaiti oikici -" t I
4. Dias 1J4'rll(s) Conrpletcd; 1-14-2019 WLj1 RDv GWA-4BRL
5a_ k`te111.1watilln.
Allen Steam Station/Duke Energy
Facility-'0n-. rr Nonce 1-aciliw TVA! of applicnblel
253 Plant Allen Road , Belmont, N.C., 28012
Phrsis-d Address_ City- and Zip
Gaston
,,,"My 1'.jKel IdCnlff" ivri Na fPlrl}
5b,1ji ituds ilwl Lnngitaliv in llCgmrlmiFwtcs scci)nlls nr decimal degrci's:
Qrmr,1l fidd. 1nk: hdblimg is milk kmll
T1 }}'
6. Is h alvl the welllsk 5OPer-ma Lent o r 7Temporary
7. is thin a repair to an exisvtn : weed. Flex Ilr ®Nu
f/rhfs Jx rr rgmir, fly4,or trn"m 1-dioxt+ rranrichu elrlorrwrWai 4md expfabi rAe ewnwre of rAr
repair under AIL m on the ixrl•f of rJdr form.
13.11umhcrof wills touellrurtrtd: 1
for lrtkke(le jrtfeerrwl or rrrxl-wbrer srMh- aefls ONLY mrh My slraeraor sP%wfk*. teal [ei0
salbrirrme foral.
9. Totid wt11 depth belim lard surfiam 218' (.)
formllf1rX4e wrflr Irsrrrffdrfubr rjd0Femf1e.Y(wfe- @ZM' ar.1d 2@lfhfr)
1 U. Stair weer levri below hrp of carsing: (h1.I
If miner fir, d es Awe ivafrag_ ilnr' "+ "
11. Bmrhille diamrrcr: 6" , 14" (ia)
l2,'WCjjCoFfilrnCL10rrfll0thod, 6" Air Hammer, 14" Mud Rotary
4i.e. allptr. regal}', cable_ diced pushLre.)
FOR WATER SUPPLY WELLS ONLY.
13a, Vidd (qm) Mc111od of test'
13b. bimnRclian npe- Amount:
For rrKrnlal 4rso ON Ly:
DESCHCPI ION
ft. ft,
]:+.OUTER CAS [for mull! -royal vwlsl OR LIKER{i asokabkS
0 fi.
82' fL
10" in,
SCH 80
PVC
i6. INNER CALSI NG OR I 'RING I2MAL-rvr Yl c
iAOA
if
PLIOEF.TE:k
TAfCKNCffi
MATTUAL
0 is.
179' FL
6" "L
SCH 80
PVC
0 Ito
208' fti
2" �k
SCH 40
PVC
I 208'ft� 1218' (1, 12" rR 0.10 I SCH40 I PVC I
R, ft. ia.
0
ft
82'
ft
Portland/Be#aLneaikare
Grout
0
4.
179'
ft.,
Portland/ BeAtesd&ee Grout
0
04
1 190'
FL
Aqua Guard pressure Grout
if ke
MSA.NDIGRAVPLPACK
FROM
11)
1 MATPRIAL
ECMF.A[TAIFAT MVTllrin
206'
(L
220'
A.
Silica Sand
20/30
i
ft.
ft,
220 (L
225 fL
Bentonite
225 fL
500 ft,
Aquaguard
ft,
rL
R.
fL
fx.
ft,
IZ.
fr.
1 16 foot bentonite seal from 190'to 206' 1
22, ('errifiealirin:
} 1/14/2019 _
SiGlulrllcaf'::s::.;" :��F dale
By ]ignmg afro fwae, F herek-y Lwjr 4' roar Me we 4mo w y (wemi cxmsrnri'red is a xvrdm c[
1L'arlt f SA JVCAC 02C .0f00 Pr f iA NCAC UC ,0 Weti Czmfrwr cn Sfandarda 4vO rfllu iT
"yalrAir remFd ire'.5 m Iwm'irdrvf raAw,Irlf �rwwn
23, She diawh tam or addMonal well drfaits:
You rnmy ,rse tile back of This page to provide additional wdl site debits Or well
WMISJ311rdUrl delails. You rrr3,' also aillach addilicmat pages if uecessan .
SUBNIMAL INSTUCTIONS
24a. Eqr All Wrilx: Subniii Ihlos faro) williin 0 days of complerioo of well
Con5lnlctipn to 4hc following-
birWun of WAter IC[rraurc[s, Informatiou Proccsuiog, Unit,
1617 Mail 9crsire {:enter, Raleigh, XC 27699-1617
tab. For Inictrios Weill ONLY: In addition [o sending 4he form to e1w address in
24a above. also submit a cop of this farm within zp days of caniple[ioik of twll
conSIMULiarl [o [Ile f00a„'i1lg:
Dh-ision dWAler RemmreeN.lrelderpvund Injeciioll Control Program,
1636 Mail Srrvilx'Center. RrilelGh, NC 27699-1636
25r, For V j4W SR der In"gtrillo W►' ft
Also submit One copy of this folnl Ntiithin 30 days ofconrpleil ion of
wdl cnosinir:tian to the ¢rnmry health depurmprrt of the crr1uay when:
consriuCtad
Forlri OW-L Nonh Carol Ira D jarinriu aF Ern 3lulrnlrlu aid NarllrW Rtisoluccs - Dii rs roe of Woor Ravin Rt, Iscd ALIg1St 2013

WELL CONSTRUCTION RECORD
Tlh FOrn S-0n be used FN Single 9r m0l iuk wells
1. Wdl Cantractor Informallon:
Robert Miller
We11 -Con4n IDT tia nw
2675
NC Well Conlr.morCerlifwMionNinikber
SAEDACCO Inc
{'Mikpui} Nan1C
2, Wtill CUH%tFVCtign Psr•geit �f
List Lffld7 p6 aWr i6ellpluir es tr_'. Cfwjlf-,S3urr, Yariunre, ffWGR rjr.0
3, Wv1l Use (chccl, w0l u ney
For rrworilal 4rso ON Ly:
nESCREPI ION
rt
ft,
]�OUT&CIRCASMG [For mull! -royal vwlsl OR LIKE R(if sionkahkS
0 fi.
69' fL
10" in,
SCH 80
PVC
7b INNER CALSI NG OR I 'RING 42MIlkrvral c
FROM
if
PLIOEF.TE:R
771rCItNCffi
MArFuAL
0 ft.
178' It,
" 6" -
SCH 80
PVC
0 Ito
335' f4
2" iiik
SCH 40
PVC
I]AlgxisliltilfrE I�lrlrmlclpallFtrblic
i
MCw1hetal OHeaultg,�Cocling Supply) OResidenital WaluSupph' (single)
DI11dusnialfCommercial DResideniiial Walu Supph: (shared)
❑lrri tion
3351ft�
345' (1•
2" iR
0.10
SCH40
PVC
'�
�
is
iB.CIGOEFf
FROM
To
MATERIAL
EMPL &CEMEN'T METHOD L
0 (L
78' fL
Portland/Be
sikare Grout
NOM-Neater Supfrl} Well:
MN1pni1orin4 ❑RCcp3
0 4.
178' r4,
Portland/ Be)aitessdtse Grout
Iriloci Ion WuLl
0 04
333' FL
Aqua Guard
pressure Grout
QAglrifcrRCchmp 0Gr0Undvr'AICFRC1k"ia4i4n
pAa�lrifcr Storage and Roca; ❑5&linit} H mCr
❑Aquifer T" ❑540rrm atCr E"Lnaq;
❑ExEcri;rrrcn4al Tq�hnOLp�❑51ia5;dklrcc {'olyTpl
❑GeoilrernlollCloxedLimp) ❑Trdcrr
❑Gmdbennal iHeAml •'Cboline Rewni) ❑011rer 4ex iri uirtit°I "t Rrrnarkm]
19LSA.Nf1fGRJk
VIM PACK(if
ie
rR{}11
lr]
17A7PRLA7�
333' Or
348' rt,
Silica Sand
20/30
ft.
fr,
3n, DR11LL1f1;
lAG aErlaeh
ald0iane13heetw if mer, 4lry
FROM
TO
OF.S('REFTIE}\.S,thr,%Ardns'n,r.irnn'L1 R
348 fL
390 fL
Bentonite
4. DjIte 1J4'ril(s) C0nrplettvl; 1-11- 2019 We11 IDv GWA-5BRL
5a_ knell 1.lacatilrn
Allen Steam Station/Duke Energy
Facil�l+' Yn. r Maila I-acilily TVA! of applimblel
253 Plant Allen Road , Belmont, N.C., 28012
` Phrsis-d Address_ City- and Zip
Gaston
f:4pmr 1'jRel IdCsilif yliun No fPlrl}
390 (L
500 fi
Aquaguard
ft,
fi
fL
fL
fi
ft,
fi
Fr
fx,
2L_ ItlMAR[Cii
Three feet bentonite seal from 330'to 333'
id. Lmitmx ilnd Lnngatplte in gwgi1xvmrrwtCwwconlls or LtcCrmM degrCics,
Qrmr,1l fidd. 1nt Ldblimg is milk kmll
T1 }}'
6.Is iarri flip well1sk 5M-nnanent or ❑Temporary
7. is thin a repair to an exist n%weed. Flex Irr 19 Nu
f/fhfs Jx rr fgmir, f+y,,wr trn"m 1-di oxt+ fan riche eirlorr,wWai 4md expi'abi rAe ewnwre of rAr
repair underAlL remurky.Yeeaiam mein the r5cul of efibe orm.
S. l�umhcraf wills toueltrurted: 1
for 1rtkke(le ark,ecr7wi of r1rvi-warer srVph- aeth ONLY mrA die seaeraor sP%wAw. }%,4 cw)
aabmirrme form.
9. Totid wt11 depth belim lard surface* 345' (.)
FoFmllfrrpie weth IfsrrrffA-f.v f ffdOfemfle.Y(wfe-?@ZM' awd 2@lfhfr)
1 U. Stair weer levri below hrp of carsiur, (fl.l
If mirrfi fir, d es Awe a ivafrag_ it De '•+ "
1 I. Bmrhirle diamrrcr: 6" , 14" (ia)
12, WICII.CoFfilrnetiorr rnbthod• 6" Air Hammer, 14" Mud Rotary
4i.e. a1i--,'tr. miwy, cable_ diem pushLre.)
FOR WATER SUPPLY WELLS ONLY.
13a, Vidd (qm) Mc1hrid of lest:
13b. bimnRclian npe- Amount:
22, CrrrifiraWrn:
} 1/11/2019 _
SiGlulrllcaf'::s::.;" :��F dale
By ]ignmg afro fwae, F herek-y LrFio- hoar Me we 4mo w y (wrmj cxmsrnri'red is a xvrdm c[
1L'arlt f SA JVCAC OTC .0f00 yr f iA NCAC UC ,0 Weti CzmfrrKrfcn Sfandafda 4vO rAW1 a•
r+'L']r of rAiT remFd bra b m Iwm'irdrrf ra Aw ,Ir4f �rwjwn
23, Site diawh iam or addMonal well defaiii:
You may ,rse tire back of rhis page to provide additional wdl site debits Or well
WMISJ311rdUrr delails. You rrla,' also aUach addilicmat pages if uecessan .
SUBNIMAL INSTUCTIONS
24a. Eqr All Wells: Subaru! Illos faro) williin xU days of compkiioo of well
con5lnlctipn to 4hc fnllouing-
Di,rixiun of WAtcr krNriurc[s, lnformatiou Proccsuiog, Unit,
1617 Mail Sersire {:enter, Raleigh, XC 27699-1617
tab. For Inictrios Weill ONLY. In addillon [o sending Me foiln to the address in
24a nbmwe. Also submit a cop of tlris farm within zp days of caniple[ioir of twll
corISUOULiOrr [) [Ire f00CnVj1rg:
Dh-ision dWAler RemmreeN.lrilderpvund Injeciiom Control Program,
1636 Mail Srrvilx'Center. R.216th, NC 27699-1636
25r, For V j4W SR * In-gerilln V4'eils:
Also submit One copy of this folni Ntiithin 30 days of conrp4eil ion of
wdl cnosinrctian to the ¢rnmr; health drparroat= of the criunry whom
corrs4rtactad
Form OW-L Nonh Carol Ira 0.jari11ri1E aF Ern 3rui nke u aid NicaW Rtisoluccs - Dit rs roe of Woor Ravin Rt, Iscd ALIg1St 2013

WELL CONSTRUCTION RECORD
Thh FOrn S-0n be used FN 5i ngk 9r m0l iuk wells
1. Wdl Cantractor Infurmallon:
Robert Miller
W01 {.on4nmIDT tia nw
2675
NC Well Conlr.morCerlikoLiorkNinikber
SAEDACCO Inc
{'mlkpuiF Nan1C
2, Wtil CUH%tFVCtign Psr•geit �f
List Lffld7 p6 aWr 16ellpl hies tr_'. Cfwjlf-,S3urr, Yariunre, ffWGR rjr.0
3, Wv1l Use (chccl, w0l u ire):
For rrworikil 4rsc ON Ly:
DESCRIFI ION
rt
p,
]�OUT&CIRCASMG [For mull! -royal vwlsl OR LIKE R(if sionkahkS
0 fL.
110' FL
10" io.
I SCH 80
PVC
U. INNER LASING OR I 'RING 42MIlkrvral c
FAOA
if
PLIOEF.TE:R
771rCItNCffi
MATTUAL
0 ft.
224' FL
6" "-
I SCH 80
PVC
0 fx,
290' k
2" iiik
I SCH 40
PVC
I]AlgxistllCElftE
DGeotheimtal OHealilkKocling Supply)
DI1KfUS rialfCommercial
❑lrri tion
I�1rllmlclpallFttblic
DResidenital WaluSupph' (single)
DResideniiial Walu Supph: (sharod)
2901W
300' (1•
2" iR
0.10
SCH40
PVC
L
is
ie.cltolffr
FROM
TO
MATEMAL
I EMPL&CEML 'T SIET1101P L
0 (L
110' H.
Portland/Be
sikare Grout
NOM-Wswr Supfrl} Well:
Mk1pni1orin4
❑RCcp3
0 0.
224' fi.
Portland/ BeAtesd&ee Grout
Iriloci Ion WuLl
0 04
291' (L
Aqua Guard
pressure Grout
QAglrifcrRrcha%g ❑qj-F0UndR'a4CrRCIk"ia4i4n
Strnagc and Roca; ❑5&linit} H mCr
❑Ag1lifcr T" ❑540rrm atCr E"inaq;
❑ExEcri;rrrcn4Rl Tq�hn�Lp�❑51ia5;dklkcc {'olyTpl
❑GeollkernLal1 Closed Limp) ❑Trdcrr
❑Gmdkenual ft!Awi •'Cboline Rewni) 00111er ilex in u20ui 121 Rrrnarks)
19LSA.NOfGRJkVEL
PACK
(if 1e
l�
17A7PRLA7�pAa�lrifcr
M
302' ft,
Silica Sand
20/30
h,
If. DR11LLIDFG
4314aeh
aldlli4 One13heelw if met' 4lry
FROM
TU
nF'.ti[ ItEP71f}\ it,thr,hMrdns'n, r.il'nn'L 1 ra
302 fL
305 A.
I Benonite
4. Ditte 1r 0j' (a) C0"kpletcd; 1-17-2019 WLjJ 1DIa GWA-6BRL
5a_ k eI1 l.Iacatilknr
Allen Steam Station/Duke Energy
Facil�IrYn. r Maila I-acillh' TVA! f4Fapplicablel
253 Plant Allen Road , Belmont, N.C., 28012
Physical Address_ City- and Zip
Gaston
f:4pmr 1'jRel IdCsilif yliun Nn fPl^1}
305 fL
500 F4,
Aquaguard
fL
FL
Fz
Ft,
Fi
Fr
fa,
F11
IL REMARKS
Four feet bentonite seal from 284'to 288'
i4, Lmitmx find Lnngatwhe in gkXieerlmrnuteli wconds nr LtcCrmnl degrmc:
Qrmr,1l held. 1nt Ldblimg is xldlickmll
T1 }}'
6.Is hare) flip welUsk 5M-nnanent or ❑Temporary
7. is thin a repair to an exist n%wrell. Flex Ikr 19 Nu
f/fhfs rx rr fgmir, f+y,,wr trn"m 1-di oxt+ fan riche eirlorr,wWai 4md expi'abi rAe ewnwre of rAr
repair under All remurky.yrx'aiam mein the r5cul of efibe fo Fm.
S. l�umhcrof wills toueltrurtrtd: 1
for 1rtkke(le rrtfeerlwl of r1rvi-warer mph- 4efls ONLY mrA My seaeraorrsP%w. Sou. }%,4 [aid
aabmirrme foray.
9. Totid trt11 depth belim lard surfiam 300' (.)
FoFm1lfrlpie wetk IfsrrrffA-f. f rjdOfemfley(wfe-?@ZM' amd 2@Jfhfx)
1 U. Stair weer levri below hrp of carsiuey (hl.l
If mioefi Ir, d es Awe ivafrag_ irne "+ "
11. Bmrhole diamrrcr: 611, 14" (ia)
12, WICII caltilrnetiorl nliethod• 6" Air Hammer, 14" Mud Rotary
4i.e. a11-,Lzr. relay}', cable_ diem pushLre.)
FOR WATER SUPPLY WELLS ONLY.
13a, Vidd (qm) Mc1hrld of test'
13b. DimnRclian npe- Amount:
22, Crrtirrat an:
1/17/2019
By ]ignmg afro fwae, F her ' LrFio— rh r Me we 4mo w y (wemi dYrRyrrui'redL is a xvrdm c[
1L'arlt f SA JVCAC OTC .0f00 yr i5AJVCACUC.02MWetiCzmfrrKrfcnSfandads4vOrAwx4T
r+'L']r alrfliT Frr,+Fd biudx ew Iwm'irdr•d ra r�b• ,Irlf �+wx�F,
23, She diawh am or addlliunal wdl Ilefails:
You may ikse tire back of this page to provide additional wdl site debits Or well
WMISJ311rdUrl delails. You iflay also aUach addilicmat pages if 1lecessan .
SUBMITTAL INSTUCTIONS
24a. Eqr All Wells: Subarui lies faro) williin xU days of compkiioo of well
con5lnlctipn to 4hc following-
Dili-Wun of WAtcr krNriurc[s, lnformatiou Proccsuiog, Unit,
1617 Mail Sersire {:enter, Raleigh, XC 27699-1617
tab. For Inimflos Wells ONLY. In addiliall io sending Me form to t1w address in
24a nbm'e. Also submit a cop of this farm within zd days of cantipletioik of twll
corISUOULiarl 10like f00a„'i1lg:
Dh'hsion dWAler RemmreeN.lrilderpvund Injeciiom Control Program,
1636 Mail Srrvilx'Center. Raltith, NC 27699-1636
25r, For Wj4W SR lire In-gtrion W4'CLIs:
Also subnlit One copy of this folnl Ntiithin 30 days of conrp4eil ion of
wdl cnosinir:tian to the ¢rnmr; health drpuroat= of the rrminry when:
corrstrtactad
Forlri OW-L Nonh Carol Ira 0.jari11ri1E aF Ern 3Iulrnke u aid NicaW Rtisoluccs - Dii rs roe of Woor Ravin Rt, Iscd ALIg1St 2013

Fractured Bedrock Evaluation
December 2019
Duke Energy Carolinas, LLC - Allen Steam Station
ATTACHMENT B
SynTerra
USGS FLASH RESULTS AND CALCULATIONS

wol-,. Allen AB-10BRL (TOPI
Elevation of measuring point [FT]
0
Number of Flow zones[-]
19
Well diameter [IN]
9
Drawdown [FTJ
2.70
Depth to ambient water level [FTJ
6.3
Depth at bottom of casing [FT]
47.8
Depth at bottom of well [FT]
201.3
Radius of influence (R°) [FT]
1000.0
Total tmnsmissivity (Tew) [FT'/day]
5.62
Flow above layer bottom depth.
Bottom DePlh [FT] Ambient [GPM] Stressed [G
[-1'Esllmele Tran5m I5 I1" 1
I
Estimate ROI
C' Solve without Rellularl2atlon
C' SOlvewlth Requ MRZetlon
ABS(Ah) maximum 5.00E+00
Regularization weight 1.00E-04
TfaRormmimam(-] 1.00E-09
Ah rFTI Farfield Mad
MSE [GPMI 5.494147E-04
Ambient W L [FTJ fi.30
Pumped WL[FTJ
FRACTURES:
19
1e
17
1a
15
14
13
12
11
19
Depth
Sum Tye, 1.000 Sum dh42 0.30052a07a9297
Estimated Ttotal[FTa/day] 5.619 Regularized Misfit 0.00
Ambient Stressed Ambient Stressed
Flow above Flow above Error Error Zone T Fraction of ..I
90.37
0.007
0.070
0.009
-0.024
0.000
0.000
94.19
0.007
0.070
0.009
-0.041
0.000
0.006
100.41
0.007
0.070
0.009
-0.058
0.000
0.000
110.38
0.007
0.070
0.021
-0.014
0.000
0.006
120.43
0.007
0.070
0.011
0.021
0.000
0.000
130.35
0.007
0.070
0.010
0.081
0.000
0.006
136.11
0.007
0.070
0.009
0.028
2.619
0.466
140.04
0.005
0.038
0.007
-0.021
0.000
0.006
150.13
0.005
0.038
0.009
0.013
0.000
0.000
153.91
0.005
0.038
0.023
0.009
0.957
0.170
159.85
0.004
0.027
-0.016
-0.010
0.000
0.000
162.09
0.004
0.027
0.015
0.009
0.000
0.000
165.65
0.004
0.027
0.017
-0.002
0.000
0.000
170.00
0.004
0.027
0.010
0.006
0.000
0.006
175.14
0.004
0.027
0.021
-0.018
0.000
0.000
179.73
0.004
0.027
0.018
-0.002
0.000
0.006
190.13
0.004
0.027
0.014
0.001
0.000
0.000
196.77
0.004
0.027
0.039
-0.012
0.000
0.006
199.80
0.004
0.027
0.028
-0.009
2.043
0.364
Ambient Flow Profile
Pumped
Flow Profile
OT
Upward Flow, in GPM
0
Upward Flow, In GPM
rl
1.?
1-1
i
,
I
.I
.4
-
r •
r �
1 r�
I�
1
I�
•� 1
y
z
2.10
AB-1013RL(TOP) FLASH

AS-IOBRL (TOP) FLASH Results and Individual Hydraulic Aperture Values
Flow Layer
in FLASH
Flow Layer
in FLASH
AMBIENT FLOW
PUMPED FLOW
Depth F'r
GPM
M77-6
DepthFT
GPM
40
51
60
0.0089
0.0063
40
50
60
0.0275
0.0070
0.0113
70
81
0.0146
0.0000
70
81
0.0118
0.0073
1
90
0.0161
91
0.0459
2
94
0.0158
95
0.0289
3
100
0.0155
100
0.0115
4
110
0.0276
110
0.0559
5
6
120
130
0.0178
0.0168
121
131
0.0910
0.1511
7
136
0.0159
136
0.0976
8
140
0.0112
140
0.0168
9
150
0.0140
150
0.0509
SO
154
0.0279
154
0.0475
11
I60
-0.0114
I60
0.0170
12
162
0.0190
162
0.0364
13
166
0.0217
166
0.0254
170
0.0144
171
0.0333
175
0.0254
175
0.0095
I80
0.0226
181
0.0250
U1920.
190
0.0177
190
0.0278
197
0.0428
198
0.0147
0.0318
200
0.0182
Dl'L3CY�9PE,
Total Trans. issivity Calculated from Thiem Equation
Q (gpm) ftz/da D..do, s (ft) Re (ft) R,„ (in) R.(ft) TT TPL (ftz/day)
1 192.5 2.7wn1000 4.5 0.375 89.51
FLASH Total T and Fit Parameters
Radius of
Transmissivity,
Influence, Re
T-L
MSE
Ah
F
(ft)
(ftz/day)
5000
5.62
5.49E-04
3.01E-01
5.79E-04
NMes:
1. Following a logarithmic sensitivity analysis of the FLASH model to radius of influence, a conservative value of 1000
feet was used.
2. Objective function, F, for model incoporates mean squared error (MSE) between interpreted and predicted Flow
profiles and the sum of squared differences (Oh) between the borehole's water level and far -field heads. Model
objective is to minimize F; therefore, a value closer to zero indicates a better fit.
3. Model was run until no more iterations produced changes in output.
4. FLASH Software: Day -Lewis, F.D., Johnson, C. D., Paillet, F.L., and Half0rd, K.l, 2011, FLASH: A Computer Program
for Flow -Log Analysis of Single Holes v1.0: U.S. Geological Survey Software Release, 07 March 2011,
5. FLASH Report: Day -Lewis, F.D., Johnson, C. D., Paillet, F,L., and Halford, K.I., 2011, A computer program for Flow -log
analysis of single holes (FLASH): Ground Water, https://dx.doi.0rg/10.1111/j.1745-6584.2011.00798.,
6. Highlighted cells indicate flow levels that do not have any observed open fractures and did not contribute to total
transmissivity. These depth intervals were not used for fracture spacing versus depth below top of rock figure because
it is assumed that there are no fractures in these intervals.

FLASH - Flow Log Analysis of Single Holes LAU
REQUIRED weuneme. Allen AB-10BRL (BOTTOM I
INPUT:
Elevation of measuring point [FT] 0 un Solver n EsUnt ale Tran1,111 Vlry
Number of Flow zones[-] 21 OEstlmate ROl
Well diameter [IN] 5.5
Dmwdown [FT] 30.70
Depth to ambient water level [FT] 3.5 C, Solve without Reg uMrl2atlon
Depth at bottom of casing [FT] 201.1
Depth at bottom of well [FT] 500.3 C' SOlvewltll Requ MRzatlon
Radius of influence (Re) [FT] 1000.0
Total tmnsmissivity (Taw) [FT'/day] 0.11
ABS(Ah) maximum 5.00E+00
Regularization weight 1.00E-04
Tfanor minimum[-] 1.00E-09
Flow above layer bottom depths
FRACTURES Bottom Depth IF] Ambient [GPM] Stressed [GPM] Tfactor [FT -JD] Ah [FT] Farfield Mad [FT]
21
211
0.0101
0.0091
0.00
0.00
-3.50
20
19
18
17
18
15
14
13
12
11
10
9
6
5
z
t
SIMULATED PROFILES (DO NOT EDIT)
MSE [GPMrJ 4.966824E-05 Sum Tye, 1.000 Sum Ah^2 0.0000838a02296
Ambient W L [FT] Estimated Ttotal [FT'/day] 0.113 Regularized Mleilt 0.00
Pumped WL[FT] -34.20
Ambient Stressed Ambient Stressed
Depth Flow above Flow above Error Error Zone T Fraotlon of..I
FRACTURES: [FT] [GPM] [GPM] [GPM] [GPM] [FT'may] tralrsmisslvlly
21
20
19
18
17
18
15
14
19
12
11
to
8
7
8
5
4
3
2
1
Dashed lines
indi-le tole relations of maeaured
dale.
adid lines indeeasirnu-d
las.
231
0.0110
0.0136
0.00
0.00
-3.50
250
0.0100
0.0177
0.00
0.00
-3.50
v1
o.olso
o.ou1
0.00
0.00
-3.50
z91
o.o13s
o.0161
0.11
0.00
-3.50
311
0.01a0
0.0120
0.19
0.00
-3.50
331
0.0135
0.0089
0.00
0.00
-3.50
351
0.0081
0.0094
0.00
0.00
-3.50
371
0.008a
0.0077
0.00
0.00
-3.50
390
0.0089
0.0082
0.00
0.00
-3.50
400
0.0078
0.0091
0.00
0.00
-3.50
all
0.007a
0.0088
0.00
0.00
-3.50
a20
0.0079
0.0115
0.00
0.00
-3.50
431
0.0068
0.0119
0.09
0.00
-3.50
aa1
o.00n
o.0081
0.00
0.00
-3.50
a51
0.0080
0.0083
0.07
0.00
-3.50
460
0.0077
0.0062
0.00
0.00
-3.50
470
0.0075
0.0079
0.00
0.00
-3.50
480
0.0087
0.0078
0.07
0.00
-3.50
490
0.0084
0.0063
0.05
0.00
-3.50
497
0.0094
0.0056
0.41
0.01
-3.49
210.90
0.000
0.014
0.010
-0.004
0.000
0.000
230.71
0.000
0.014
0.011
0.000
0.000
0.000
250.22
0.000
0.014
0.010
0.004
0.000
0.000
270.62
0.000
0.014
0.015
-0.002
0.000
0.000
291.48
0.000
0.014
0.013
0.003
0.013
0.113
310.65
0.000
0.012
0.014
0.000
0.021
0.190
330.59
0.000
0.009
0.013
-0.001
0.000
0.000
350.64
0.000
0.009
0.008
0.000
0.000
0.000
370.61
0.000
0.009
0.008
-0.002
0.000
0.000
390.05
0.000
0.009
0.009
-0.001
0.000
0.000
400.48
0.000
0.009
0.006
0.000
0.000
0.000
410.69
0.000
0.009
0.007
-0.001
0.000
0.000
420.44
0.000
0.009
0.006
0.002
0.000
0.000
430.73
0.000
0.009
0.007
0.002
0.010
0.090
440.66
0.000
0.008
0.008
0.000
0.000
0.000
450.58
0.000
0.006
0.006
0.000
0.006
0.070
4fi0.35
0.000
0.007
0.006
-0.001
0.000
0.000
470.20
0.000
0.007
0.007
0.001
0.000
0.000
479.64
0.000
0.007
0.009
0.000
0.006
0.071
490.25
0.000
0.006
0.008
0.000
0.006
0.053
496.93
0.000
0.006
0.009
0.000
0.047
0.414
Ambient Flow Profile
Pumped
Flow Profile
Upwartl Flow, in GPM
Upward Flow, In GPM
z 00
•
I.
•I
•
•Il
.I
.I
1
I
•I
-
G
r�
I'
o
a
I
11
{
a
1
1�
I•
1
AB-10BRL (BO170M)FL45H

AB-IOBRL (BOTTOM) FLASH Results and Individual Hydraulic Aperture Values
Depth Of
Interval
Fracture
CALIBRATED
Viscosity f
Mytlrctivi ty o
Density f Water,
ty o
Acceleration due
Hydraulic
y
Hydraulic
y
Flow Layer in
Depth
Depth
Center of
Leath
# of Fractures in
Spacing in
Fraction of Total
Tran5mi55ivity
Tran5mi55ivity
Transmissivity
Conductivity Water, pa
p„.'
to Gravity, g
Aperture, en
Aperture, en
FLASH
(feet bg5)
(feet BTOR)
Interval
(feet)
FIOw Layer
Interval
Tran5mi55ivity
(ft2/tlay)
(R2/day)
(feet/day) (N s/m)
(kg/m')
(m/52)
(m)
(mm)
(feet BTOR)
(feet)
1
210.90
127.90
123.00
9.80
3
3.3
0.0
0.000
0.000
2
230.71
147.71
137.80
19.82
1
0.0
0.000
0.000
3
250.22
167.22
157.47
19.51
1
0.0
0.000
0.000
4
270.62
187.62
177.42
20.39
1
20.4
0.0
0.000
0.000
5
291.48
208.48
198.05
20.87
1
20.9
0.1
0.013
0.235 2.53E-07
1.13E-02 1.20E-03 999.33
2.05E-02 1.20E-03 999.33
9.8
9.8
7.20E-05
0.07
0.04
6
310.85
227.85
218.16
19.37
7
2.8
0.2
0.022
0.397 4.27E-07
4.48E-05
7
330.59
247.59
237.72
19.74
1
0.0
0.000
0.000
8
350.84
267.84
257.71
20.25
1
0.0
0.000
0.000
9
370.61
287.61
277.73
19.77
1
0.0
0.000
0.000
10
390.05
307.05
297.33
19.44
1
0.0
0.000
0.000
11
400.48
317.48
312.26
10.43
1
0.0
0.000
0.000
12
410.69
327.69
322.59
10.22
1
0.0
0.000
0.000
13
420.44
337.44
332.57
9.74
1
0.0
0.000
0.000
14
430.73
347.73
342.58
10.29
1
10.3
0.1
0.010
0.187 2.01E-07
1.82E-02 1.20E-03 999.33
9.8
6.66E-05
0.07
15
440.86
357.86
352.80
10.13
1
0.0
0.000
0.000
16
450.58
367.58
362.72
9.72
1
9.7
0.1
0.008
0.147 1.58E-07
1.51E-02 1.20E-03 999.33
9.8 6.15E-05
0.06
17
460.35
377.35
372.46
9.77
1
0.0
0.000
0.000
16
470.20
387.20
382.28
9.85
1
0.0
0.000
0.000
1.53E-02 1.20E-03 999.33
1.08E-02 1.20E-03 999.33
1 1.29E-01 1.20E-03 999.33
19
479.84
396.84
392.02
9.64
1
9.6
0.1
0.008
0.147 1.58E-07
9.8 6.15E-OS
0.06
20
490.25
407.25
402.04
10.40
1
10.4
0.1
0.006
0.112 1.21E-07
9.8 5.62E-OS
9.8 1 1.11E-04
0.06
0.11
21
496.93
413.93
410.59
6.69
1
6.7
0.4
0.047
1 0.865 1 9.30E-07
Open
Fractures
Flow Layer in
Identified by
FLASH
2028GEL
.
205.2
1
205.5
257.2
4
295.2
297.0
298.1
301.0
6
305.5
305.7
305.9
Flow Layer in
FLASX
PUMPED FLOW
Depth (FT)
191
Q (GPM)
0.0080
Depth (FT)
191
Q (GPM)
0.2423
1
200
211
0.0122
0.0101
200
210
0.2530
0.0091
2
231
0.0110
230
0.0136
3
250
0.0100
251
0.0177
4
271
0.0150
271
0.0111
5
291
0.0135
291
0.0161
6
311
0.0140
311
0.0120
7
331
0.0135
330
0.0089
8
351
0.0081
351
0.0094
9
371
0.0084
371
0.0077
10
390
0.0089
390
0.0082
11
400
0.0078
401
0.0091
12
411
0.0074
410
0.0088
13
420
0.0079
421
0.0115
14
431
0.0068
431
0.0119
15
441
0.0077
441
0.0081
16
451
0.0080
451
0.0083
17
461
0,0077
461
1,0062
18
470
0.0075
471
0.0079
19
480
0.0087
481
0.0078
20
490
0.0084
1 491
0.0063
21
497
0.0094
1 497
0.0056
average u.-
Total Transmissivity Calculated from Thiem Equation
Q (9pm) 1 Q (ft'/day) Drawdown, s (tt) Ru (ft) Rw (in) R. (ft) T1011L (ft /day)
0.25 48.125 30.7 1000 2.75 1 0.229 2.09
FLASH Total T and Fit Parameters
Radius of
Transmi55ivity,
Influence, Rr
TT-L
MSE
Ah
F
(ft)
(ft2/day)
1000
0.11
4.97E-OS
8.38E-OS
4.97E-OS
Slu Test Information -Com letetl in Completed Wells
$Green
$Green Interval(ft Midpoint Of Tranlmi55ivity
Hydra YliC
Hydraulic
Interval
ee
BTOR interval ft2 da
A enure m
Conducdvi
AB-lOBRL
206
125
130 0.03
135
0.03
2.51E-03
208
Notes:
1. Following a logarithmic sensitivity analysis of the FLASH model to radius of influence, a conservative value of 1000 feet was
used.
2. Objective function, F, for model Incoporates mean squared error (MSE) between Interpreted and predicted flow profiles and
the sum of squared differences (Ah) between the borehole's water level and far -field heads. Model objective is to minimize F;
therefore, a value closer to zero Indicates a better fit.
3. Model was run until no more Iterations produced changes In output.
4. FLASH Software: Day -Lewis, F.D., ]ohnson, C. D., Paillet, F.L., and Halford, K.J, 2011, FLASH: A Computer Program for
Flow -Log Analysis of Single Holes v1.0: U.S. Geological Survey Software Release, 07 March 2011,
S. FLASH Report: Day -Lewis, F.D., Johnson, C. D., Paillet, F.L., and Halford, K.J., 2011, A computer program for Flow -log
analysis of single holes (FLASH): Ground Water, https://dx.dol.org/10.1111/j.1745-6584.2011.00798.x
6. Highlighted cells Indicate flow levels that do not have any observed open fractures and did not contribute to total
transmissivity. These depth intervals were not used for fracture spacing versus depth below top of rock figure because it is
assumed that there are no fractures In these Intervals.

FLASH - Flow Log Analysis of Single Holes LAO
REQUIRED Writ-,. Allen GWA-4BRL
INPUT:
Elevation of measuring point [FT] 0 un Solver n EsUnt ale Transmtsslvpy
Number of Flow zones[-] 32 0Estimate ROl
Well diameter [IN] 5.5
Dmwdown [FT] 23.80
Depth to ambient water level [FT] 8.3 O SOW without Reg ularl2atlon
Depth at bottom of casing [FT] 179.1
Depth at bottom of well [FT] 499.8 C' Solvewltll RequMRzatlon
Radius of influence (Re) [FT] 1000.0
Total tmnsmissivity (T..) [FT'Iday] 2.01
ABS(Ah) maximum 5.00E+00
Regularization weight 1.00E-04
Tf.- inimv H 1.00E-09
Flow above layer bottom depths
FRACTURES Bottom Depth [FT1 Ambient [GPM] Stressed [GPM] Tfactor [FT -ID] ah [FT] Farfield Mad [FT]
32
185
0.0094
0.1865
0.14
0.00
-8.30
31
30
29
28
27
2e
2s
za
23
22
31
20
19
18
17
18
15
14
13
12
11
10
5
a
1
SIMULATED PROFILES (DO NOT EDIT)
MSE [G PM'J 3.960865E-05 Sum Tye, 1.000 Sum dh^2 0.0004908544577
Ambient W L [FT] Estimated Ttotal [FT'/day] 2.011 Regularized Misfit 0,00
Pumped WL[FT] -32.10
Ambient Stressed Ambient Stressed
Depth Flow above Flow above Error Error Zone T Fraction of..l
FRACTURES: [FT] [GPM] [GPM] [GPM] [GPM] [FT'/day] tratrsmisslvlly
3231
w
28
28
27
2s
24
23
2221
2a
19
18
17
18
15
14
13
12
11
10
9
s
6
5
4
3
2
1
I -hod lines
lodmele mte mtarons or meeeored
ante.
sale lines lndw-imu-d
las.
195
0.0081
0.1597
0.24
0.01
-8.29
z05
0.0100
0.1151
0.55
0.02
-8.28
zIs
o.0108
o.olos
0.00
0.00
-8.30
225
0.0106
0.011a
0.00
0.00
-8.30
235
0.0107
0.0123
0.00
0.00
-8.30
zaa
o.0108
o.o1z7
0.00
0.00
-8.30
zss
o.olzz
o.olzz
0.00
0.00
-8.30
265
0.0055
0.0127
0.00
0.00
-8.30
275
0.0085
0.0135
0.00
0.00
-8.30
280
0.0095
0.0119
0.00
0.00
-8.30
295
0.009a
0.0122
0.00
0.00
-8.30
305
0.0041
0.011a
0.00
0.00
-8.30
315
0.0097
0.0119
0.00
0.00
-8.30
3zs
o.0083
0.0106
0.00
0.00
-8.30
335
0.0083
0.0130
0.00
0.00
-8.30
345
0.0118
0.0113
0.00
0.00
-8.30
355
0.0111
0.0118
0.00
0.00
-8.30
365
0.0090
0.0101
0.00
0.00
-8.30
37s
o.0090
o.olao
0.01
0.00
-8.30
385
0.0079
0.0074
0.00
0.00
-8.30
395
0.0082
0.0093
0.00
0.00
-8.30
a05
0.0075
0.0106
0.00
0.00
-8.30
a15
O.00aa
0.0101
0.00
0.00
-8.30
4z5
0.0064
0.0065
0.00
0.00
-8.30
a3s
o.0078
o.o11z
0.00
0.00
-8.30
aaa
0.0092
0.010a
0.00
0.00
-8.30
ass
o.00as
o.0113
0.01
0.00
-8.30
465
0.0067
0.0055
0.00
0.00
-8.30
a7s
o.0076
o.00sz
0.00
0.00
-8.30
aes
o.olla
o.00s3
0.01
0.00
-8.30
495
0.0060
0.0054
0.03
0.01
-8.29
185.16
0.000
0.186
0.009
0.000
0.289
0.144
195.11
0.000
0.160
0.006
0.000
0.480
0.239
204.69
0.000
0.115
0.010
0.000
1.110
0.552
214.61
0.000
0.012
0.011
-0.002
0.000
0.000
225.24
0.000
0.012
0.011
-0.001
0.000
0.000
235.32
0.000
0.012
0.011
0.000
0.000
0.000
z4a.os
o.aoo
o.a1z
o.a11
0.001
o.aoo
o.aoo
255.12
0.000
0.012
0.012
0.000
0.000
0.000
2s4.64
0.000
0.012
0.005
0.000
0.000
0.000
274.79
0.000
0.012
0.009
0.001
0.002
0.001
280.10
0.000
0.012
0.010
0.000
0.000
0.000
295.08
0.000
0.012
0.009
0.000
0.003
0.001
304.60
0.000
0.012
0.004
0.000
0.000
0.000
314.72
0.000
0.012
0.010
0.000
0.000
0.000
324.79
0.000
0.012
0.008
-0.001
0.000
0.000
334.91
0.000
0.012
0.006
0.001
0.000
0.000
344.65
0.000
0.012
0.012
0.000
0.000
0.000
354.60
0.000
0.012
0.011
0.000
0.000
0.000
3s4.73
0.000
0.012
0.009
-0.002
0.000
0.000
375.07
0.000
0.012
0.009
0.002
0.024
0.012
385.23
0.000
0.010
0.008
-0.002
0.000
0.000
394.77
0.000
0.010
0.006
0.000
0.000
0.000
404.68
0.000
0.010
0.008
0.001
0.000
0.000
415.29
0.000
0.010
0.004
0.001
0.000
0.000
424.66
0.000
0.010
0.006
-0.003
0.000
0.000
435.18
0.000
0.010
0.008
0.002
0.000
0.000
444.47
0.000
0.010
0.009
0.001
0.000
0.000
455.06
0.000
0.010
0.005
0.002
0.024
0.012
464.95
0.000
0.007
0.007
-0.002
0.000
0.000
475.00
0.000
0.007
0.008
0.001
0.000
0.000
484.55
0.000
0.007
0.011
0.001
0.021
0.010
494.96
0.000
0.005
0.006
0.000
0.059
0.029
Ambient Flow Profile
Pumped
Flow Profile
Upwartl Flow,in GPM
Upward Flow,in GPM
•
1�
f
i•..t
1
r-�
r
�
=
G
rl
-
1
4� 1
1r
1
1�
wl
1
1
GWA-0BRL FL4SH

GWA-4BRL FLASH Results and l,di,id,,l Hydraulic Aperture V,hm,
�-Lsaa
I-
L
saaJ--L
IOU
J-
0��
Open
Fractures Flow Layer in
Identified by FLASH
GEL
191
192 2
193
195
196
196
197
198
198 3
200
20
202
202
201
t213 4
213
213
458 29
458
AMBIENT FLOW
PUMPED FLOW
Depth (FT)
175
Q (GPM)
0.0000
Depth (FT)
175
Q (GPM)
0.1867
1
2
I7
111
195
1,0114
0.0081
111
195
0,1111
0.1597
3
4
205
215
0.0100
0.0108
205
215
0.1151
0.0105
5
225
0.0106
226
0.0114
6
235
244
0.0107
0.0108
236
246
0.0123
0.0127
8
255
0.0122
255
0.0122
9
265
0.0055
265
0.0127
SO
11
275
280
0.0085
1 0.0095
275
280
0.0135
0.0119
12
295
0.0094
295
0.0122
13
305
0.0041
305
0.0114
14
315
0.0097
314
0.0119
15
325
0.0083
325
0.0108
16
335
0.0083
335
0.0130
17
345
0.0118
345
0.0113
18
355
0.0111
355
0.0118
19
365
0.0090
365
0.0101
20
375
0.0090
375
0.0140
21
385
0.0079
385
0.0074
22
395
0.0082
395
0.0093
23
405
0.0075
405
0.0106
29
-
1 0.0044
415
0.0101
25
425
0.0064
425
0.0065
26
435
0.0078
435
0.0112
27
444
0.0092
445
0.0104
28
455
0.0045
455
0.0113
29
465
0.0067
465
0.0055
30
475
0.0076
475
0.0082
31
485
0.0114
485
0.0083
32
495
0.0060
495
0.0054
Average u.UI
Total Transmissivity Calculated from Thiem Equation
Q (gpm) ft2 da Drawdown, s (ft) R. (R) Rw (in) R. (ft) TT T R2/da
0.2 38.5 23.8 1000 2.75 0.229 2.16
FLASH Total T and Fit Parameters
Radius of
Transmissivity,
Influence, Ro
TTO
MSE
Ah
F
(ft)
(ft2/day)
1000
2.01
3.96E-OS
4.91E-04
3.9]E-05
Slug Test Information - Completed In Com IMetl Wells
Screen Interval
R be,,
s
Screen Interval (ft Mid -point of
BTOR ee interval
Transmissivity Hydraulic
ft2 da Aperturem
Hydraulic
onuctivitV
GWA-4BRL
208
127 132
137
0.54 0.06
5.45E-02
218
Notes:
1. Following a logarithmic sensitivity analysis of the FLASH model to radius of influence, a conservative value of 1000 feet was
used.
2. Objective function, F, for model incoporates mean squared error (MSE) between interpreted and predicted flow profiles and
the sum of squared differences (4h) between the borehole's water level antl far -field heads. Model objective is to minimize F;
therefore, a value closer to zero indicates a better fit.
3. Model was run until no more iterations produced changes in output.
4. FLASH Software: Day -Lewis, F.D., Johnson, C. D., Pallet, F.L., and Halford, K.J, 2011, FLASH: A Computer Program for Flow -
Log Analysis of Single Holes v1.0: U.S. Geological Survey Software Release, 07 March 2011,
5. FLASH Report: Day -Lewis, F.D., Johnson, C. D., Paillet, F.L., and Halford, K.J., 2011, A computer program for flow -log
analysis of single holes (FLASH): Ground Water, https://dx.doi.org/10.1111/j.1745-6584.2011.00798.,
6. Highlighted cells indicate Flow levels that do not have any observed open fractures and did not contribute to total
transmissivity. These depth intervals were not used for fracture spacing versus depth below top of rock figure because it is
assumed that there are no fractures in these intervals.

Weuname. Allen GWA-SBRL(TOP)
Elevation of measuring point [FT]
0
Number of Flow zones[-]
7
Well diameter [IN]
9
Dmwdown [FT]
1.80
Depth to ambient water level [FT]
10.8
Depth at bottom of casing [FT]
65.5
Depth at bottom of well [FT]
177.3
Radius of influence (Ro) [FT]
1000.0
Total tmnsmissivity (Tew) [FT'/day]
1,77
Flow above layer bottom depth.
Bottom Depth [FT] Ambient [GPM] Stressed [G
Esllm ale TlanSn11HIl" I
Esllmale ROI 1
C' Solve whhout Regult". atlon
C' SGlvewltll Requ Mriza0on
ABS(Ah) maximum 5.00E+00
Regularization weight 1.00E-04
TfeRor minimum[-) 1.00E-09
dh rFTI Farfield Mad
MSE [GPMrJ
4.009561E-05
Sum Tyr 1.000
Sum dhA2 0.0704592593666
Ambient W L [FT]
-10.80
Estimated Ttotal [FT'/day] 1.770
Regulerl od Misfit 0.00
Pumped WL[FTJ
-12.60
Ambient Stressed Ambient
Stressed
Depth
Flow above Flow above Error
Error Zone T Fraction of..I
FRACTURES:
[FT]
[GPM] [GPM] [GPM]
[GPM] [FT'/day] transmissivily
®
1111
11 �
111
I11
��
®' :
1111
111
111•
111
1111
1111
1111
111
111•
I11
Ambient Flow Profile
Pumped
Flow Profile
"Word Flow, in GPM
Upward Flow, In GPM
•
I•
I
1 I
• I
_
�
I
I
I•
I
I
I
I
I
o
I ~
1
I
'
rl
I
I
'
GWASBRL (TOP) FLASH

GWA-SBRL (TOP) FLASH Results and Individual Hydraulic Aperture Values
Depth of
Interval
Fracture
CALIBRATED
Hydraulic
Viscosity of
Density of
Acceleration
Hydraulic Aperture,
Hydraulic
Flow Layer in
Depth
Depth
Center of
Lenth
it of Fractures in
Spacing in
Fraction of Total
Transmissivity
Transmissivity
Transmissivity
Conductivity
Water, p3
Water, pw3
due to Gravity,
Aperture, en
FLASH
(fee[ bgs)
(feel BTOR)
Interval
(feet BTOR)
(feet)
Flow Layer
Interval
(feet)
Transmissivity
(ft'/day)
(fI3/tlay)
(m /s) (feet/day)
(N s/m2)
(kg/m3)
(m/s3)
/
(eh)
(mm)
1
113.95
7.95
3.97
7.95
1
1
7.9
0.0
0.000
sivity
calculEt e�6y Thlem
quaclon
corporates Flow
from 40 feet of
rr, l
t6erefore,nno
<aubratea
minarn-vnlea were
calculates.
2
123.72
17.72
12.83
9.]7
9.8
0.3
0.459
4 g3E-07 4.]OE-02
1.20E-03
999.33
999.33
9.8 8.99E-05
9.8 6.56E-05
0.09
0.07
3
133.82
27.82
22.77
10.10
4
2.5
0.4
0.713
7.66E-07 7.06E-02 1.20E-03
4
143.81
37.81
32.81
9.99
1
10.0
0.0
0.000
5
153.38
47.38
42.60
9.57
1
0.0
0.000
6
164.29
58.29
52.83
10.91
1
10.9
0.3
0.598
6.43E-07 5.49E-02 1.20E-03
999.33
9.8 9.82E-OS
0.10
7
174.04
68.04
63.16
9.76
1
0.0
0.000
OPT Flow Layer in
Identified by FLASH
80.0 Transition
98.1 Zone
109.8 1
2
129.1
129.7 3
131.9
133.3
138.0 4
Flow Layer
n FLASH
AMBIENT FLOW
PUMPED FLOW
Depth FT
GPM
Depth (FT)
I Q (GPM)
64
74
0,0000
0.0058
64
73
0,3535
0.0070
84
0.0072
84
0.0102
94
104
0.0126
0.0079
93
104
0.0078
0.0185
1
2
114
124
0.0110
0.0058
114
125
0.0117
0.0153
3
134
0.0125
134
0.0095
4
144
0.0060
144
0.0000
5
6
153
164
0.0084
0.0065
152
164
0.0054
0.0074
7
1 174
1 0.0097
1]4
0.0000
Average 0.08
Total Transmissivity Calculated from Thiem Equation
Q (gpm) Q ft3/da Drawdown, s (ft) Re (ft) R„, (in) R. (ft) TTarA. (ft2/day)
1.1 211.]5 1.8 J.O. 1 4.5 1 0.375 1 147.70
FLASH Total T and Fit Parameters
Radius of
Transmissivity,
Influence, Re
TTe
MSE
Ah
F
(ft)
(ft2/day)
1000
1.77
4.01E-OS
1.05E-02
4.11E-OS
Notes:
1. Following a logarithmic sensitivity analysis of the FLASH model to radius of influence, a conservative value of 1000 feet was
used.
2. Objective function, F, for model incoporates mean squared error (MSE) between interpreted and predicted flow profiles and
the sum of squared differences (4h) between the borehole's water level antl far -field heads. Model objective is to minimize F;
therefore, a value closer to zero indicates a better fit.
3. Model was run until no more iterations produced changes in output.
4. FLASH Software: Day -Lewis, F.D., Johnson, C. D., Pallet, F.L., and Halford, K.J, 2011, FLASH: A Computer Program for Flow -
Log Analysis of Single Holes y1.0: U.S. Geological Survey Software Release, 07 March 2011,
5. FLASH Report: Day -Lewis, F.D., Johnson, C. D., Paillet, F.L., and Halford, K.J., 2011, A computer program for flow -log
analysis of single holes (FLASH): Ground Water, https://dx.doi.org/10.1111/j.1745-6584.2011.00798.x
6. Highlighted cells indicate Flow levels that do not have any observed open fractures and did not contribute to total
transmissivity. These depth intervals were not used for fracture spacing versus depth below top of rock figure because it is
assumed that there are no fractures in these intervals.

FLASH - Flow Log Analysis of Single Holes LAO
REQUIRED Weuname. Allen GWA-5BRL(BOTTOM )
INPUT:
Elevation of measuring point [FT] 0 tun Solver n E511m ale Tran9mt99lvpy
Number of Flow zones[-] 33 OEstlmate ROl
Well diameter [IN] 5.5
Drawdown [FT] 6.30
Depth to ambient water level [FT] 1.2 C, SOW without Reg uMrl2atlon
Depth at bottom of casing [FT] 177.E
Depth at bottom of well [FT] 500.3 C' SDlvewltll Requ Mrintlon
Radius of influence (Ro) [FT] 1000.0
Total tmnsmissivity (T..) [F71day] 32.69
ABS(Ah) maximum 5.00E+00
Regularization weight 1.00E-04
Tfanor minimum [-) 1.00E-09
Flow above layer bottom depths
FRACTURES Bottom Depth [FT] Ambient [GPM] Stressed [GPM] Tfactor [FT -JD] ah [FT] Fairfield Mad [FT1
33
179
0.0000
0.8027
0.01
0.00
-1.20
32
31
3a
29
28
27
28
25
24
23
22
21
20
19
18
17
18
15
14
13
12
11
18
9
8
6
5300
a
1
SIMULATED PROFILES (DO NOT EDIT)
MSE [GPMrJ 7.824636E-04 Sum Tye, 1.000 Sum dh^2 0.0006758373597
Ambient W L [FT] Estimated Ttotal [FT'/day] 32.686 Re .Wlzed Mid 0.00
Pumped WL[FT]
Ambient Stressed Ambient Stressed
Depth Flow above Flow above Error Error Zone T Fraction of..I
FRACTURES: [FT] [GPM] [GPM] [GPM] [GPM] [FT'/day] tralrsmisslvlly
33
32
31
29
28
2]
28
25
za
23
22
21
za
19
18
17
18
15
14
19
12
11
18
9
e
7
8
5
4
3
2
1
Dashed lines
indi-le tole relations of measured
dale.
adid lines indeaasi-1-d
las.
189
-0.0069
0.7920
0.00
0.00
-1.20
199
-0.0104
0.8078
0.00
0.00
-1.20
208
-0.0146
0.7768
0.00
0.00
-1.20
218
-0.0145
0.8027
0.00
0.00
-1.20
228
-0.0141
0.8027
0.00
0.00
-1.20
238
0.0000
0.8027
0.00
0.00
-1.20
248
0.0000
0.8027
0.00
0.00
-1.20
258
0.0045
0.7275
0.00
0.00
-1.20
268
0.0000
0.7275
0.00
0.00
-1.20
278
0.0075
0.8027
0.00
0.00
-1.20
288
0.0056
0.7275
0.00
0.00
-1.20
299
0.0000
0.8027
0.00
0.00
-1.20
308
0.0000
0.7620
0.00
0.00
-1.20
318
0.0000
0.8922
0.00
0.00
-1.20
329
0.0127
0.8027
0.00
0.00
-1.20
339
0.0151
0.8922
0.00
0.00
-1.20
349
0.0145
0.7275
0.00
0.00
-1.20
358
0.0131
0.8027
0.00
0.00
-1.20
368
0.0178
0.8027
0.00
0.00
-1.20
378
0.0227
0.8027
0.00
0.00
-1.20
368
0.0200
0.8922
0.98
0.03
-1.17
399
0.0063
0.0059
0.00
0.00
-1.20
408
0.0044
0.0045
0.00
0.00
-1.20
418
0.0047
0.0000
0.00
0.00
-1.20
428
0.0052
0.0000
0.00
0.00
-1.20
438
0.0058
0.0052
0.00
0.00
-1.20
448
0.0060
0.0054
0.00
0.00
-1.20
458
0.0057
0.0056
0.00
0.00
-1.20
468
0.0059
0.0058
0.00
0.00
-1.20
478
0.0061
0.0047
0.00
0.00
-1.20
488
0.0056
0.0066
0.00
0.00
-1.20
a98
0.0045
0.0060
0.01
0.01
-1.19
178.50
0.003
0.805
-0.003
-0.002
0.211
0.006
188.63
0.003
0.800
-0.010
-0.008
0.000
0.000
198.57
0.003
0.800
Ambient Flow Profile
Pumped
Flow Profile
Upwartl Flow, in GPM
Upward Flow, in GPM
•
1
1�
r
i
1
11
1
1
1
�r
•
r
•
1
1
1
GWA-SBRL (BOTTOM) FL48H

GWA-SBRL (BOTTOM) FLASH Results and Individual Hydraulic Aperture Values
Depth of
Interval
Fracture
CALIBRATED
Hydraulic
Viscosity of
Density of
Acceleration
Hydraulic Aperture,
Hydraulic
Flow Layer in
Depth
Depth
Center of
Lenth
it of Fractures in
Spacing in
Fraction of Total Transmissivity
Transmissivity
Transmissivity
Conductivity
Water, p2
Water, pw3
tlue to Gravity,
Aperture, es
FLASH
(fee[ bgs)
(feet BTOR)
Interval
feet OR)
(feet)
Flow Layer
Interval
(feet)
Transmissivity
(ft2/day)
(ft2/day)
(an /s)
(feet/day)
(N s/m2)
(kg/m3)
g
(m/s2)
(m)
(mm)
1
178.50
72.50
72.05
0.90
1
0.9
0.006
0.211
0.263
2.83E-07
2.92E-01
1.20E-03
999.33
9.8
7.47E-05
0.07
2
188.83
82.83
77.66
10.33
2
5.2
0.000
a 000
0.000
Flow Layer
m FLASH
AMBIENT FLOW
PUMPED FLOW
Depth FT
GPM
De th FT
GPM
168
0.0000
169
0.8060
1
2
179
189
0.0000
-0.0069
179
188
0.8027
0.7920
3
4
199
208
-0.0104
-0.0146
198
208
0.8078
0.7768
5
6
218
228
-00145
I n 141
218
228
0.8027
0.8027
7
238
0.0000
238
0.8027
8
248
0.0000
249
0.8027
9
10
258
268
0.0045
0.0000
258
268
0.7275
0.7275
11
278
0.0075
278
0.8027
12
288
0.0056
288
0.7275
13
299
0.0000
299
0.8027
14
308
0.0000
309
0.7620
15
318
0.0000
319
0.8922
16
329
0.0127
329
0.8027
17
339
0.0151
338
0.8922
IS
349
0.0145
348
0.7275
19
358
0.0131
358
0.8027
20
368
0.0178
368
0.8027
21
378
0.0227
379
0.8027
22
388
0.0200
388
0.8922
23
399
0.0063
398
0.0059
24
408
0.0144
409
0.0045
25
418
0.0047
418
0.0000
26
428
0.0052
429
0.0000
27
438
0.0058
439
0.0052
28
448
0.0060
448
0.0054
29
458
0.0057
459
0.0056
30
468
0.0059
468
0.0058
31
478
0.0061
478
0.0047
32
488
0.0056
488
0.0066
33
498
0.0045
498
0.0060
Total Transmissivity Calculated from Thiem Equation
Q (Span) ft3/da Drawdown, s (ft) Re (ft) R.(in) lt. (ft) Tt.... (ft2/tlay)
1 192.1 6.3 1000 2.75 0.229 40.76
FLASH Total T and Fit Parameters
Radius of
Transmissivity,
Influence, R.
Tr
MSE
Ah
F
(ft)
(ft2/day)
1000
32.69
7.82E-04
I 6.76E-04
7.83E-04
Slu Test Information -Com leted in Com letetl Wells
Screen Interval
(ft. s
Screen Interval (ft
BTOR
Mid -point of Transmissivity
ee interval ft2 da
Hydraulic
A erture m
Hydraulic
Conductivl
GWA-58RL
335
229
234 0.20
0.04
1.98E-02
45
239
(Notes:
1. Following a logarithmic sensitivity analysis of the FLASH model to radius of influence, a conservative value of 1000 feet
was used.
2. Objective function, F, for model incoporates mean squared error (MSE) between interpreted and predicted Flow profiles
and the sum of squared differences (Ah) between the borehole's water level and far -field heads. Model objective is to
1 ze F; therefore, a value closer to zero indicates a better fit.
3.Model was run until no more iterations produced changes in output.
4. FLASH Software: Day -Lewis, F.D., Johnson, C. D., Paillet, F.L., and Halford, K.J, 2011, FLASH: A Computer Program for
Flow -Log Analysis of Single Holes v1.0: U.S. Geological Survey Software Release, 07 March 2011,
5. FLASH Report: Day -Lewis, F.D., Johnson, C. D., Paillet, FL., and Halford, K.J., 2011, A computer program for How -log
analysis of single holes (FLASH): Ground Water, https://dx.doi.org/10.1111/j.1745-6584.2011.00798.,
6. Highlighted cells indicate flow levels that do not have any observed open fractures and did not contribute to total
tra nsmissivity. These depth intervals were not used for fracture spacing versus depth below top of rock figure because it is
assumed that there are no fractures in these intervals.

FLASH - Flow Log Analysis of Single Holes LAO
61
REQUIRED Writ-,. Allen GWA-6BRL
INPUT:
Elevation of measuring point [FT] 0 un Solver n EsUnt ale Trensmtsslvpy
Number of Flow zones[-] 26 0Estimate ROl
Well diameter [IN] 5.5
Dmwdown [FT] 28.90
Depth to ambient water level [FT] 42.1 O SOW without Reg uMrl2atlon
Depth at bottom of casing [FT] 222.5
Depth at bottom of well [FT] 500.4 C' Solvewltll RequMRZntlon
Radius of influence (Re) [FT] 1000.0
Total tmnsmissivity (T..) [FT'/day] 1,98
ABS(Ah) maximum 5.00E+00
Regularization weight 1.00E-04
Tf.- inimv H 1.00E-09
Flow above layer bottom depths
FRACTURES Bottom Depth [F11 Ambient [GPM] Stressed [GPM] Tfactor [FT -JD] ah [FT] Farfield Mad [FT]
28
224
0.0103
0.2229
0.00
0.00
-42.10
27
26
25
24
23
22
21
29
19
18
17
ifi
15
14
13
12
11
10
8
6
5
a
2
t
SIMULATED PROFILES (DO NOT EDIT)
MSE [GPMrJ 3.865761E-05 Sum Tye, 1.000 Sum dhA2 0.0031a83a53524
Ambient W L [FTJ -02.10 Estimated Ttotal [FT'/day] 1.979 Regularized Mlstlt 0,00
Pumped WL[FT] -71.00
Ambient Stressed Ambient Stressed
Depth Flow above Flow above Error Error Zone T Fraction of..I
FRACTURES: [FT] [GPM] [GPM] [GPM] [GPM] [FT'may] tratrsmisslvlly
28
27
28
25
24
23
22
21
2a
19
18
17
16
15
14
13
12
11
is
9
s
fi
5
4
3
2
1
I -hod lines
lodmele mte reta5ane or meeeored
sine.
sdla lines lndw-imu-d
las.
234
0.0109
0.2229
0.05
0.00
-42.10
244
0.0099
0.2086
0.00
0.00
-42.10
254
0.0122
0.2069
0.00
0.00
-42.10
264
0.0107
0.2229
0.12
0.01
-42.09
274
0.0114
0.1665
0.41
0.04
-42.06
284
0.0139
0.0943
0.04
0.00
-42.10
z9a
o.00fio
0.0849
0.35
0.04
-42.06
304
0.0047
0.0080
0.00
0.00
-42.10
314
0.0058
0.0076
0.00
0.00
-42.10
324
0.0060
0.0079
0.00
0.00
-42.10
334
0.0053
0.0082
0.00
0.00
-42.10
344
0.0069
0.0069
0.00
0.00
-42.10
354
0.0067
0.0067
0.00
0.00
-42.10
364
0.0058
0.0067
0.00
0.00
-42.10
375
0.0069
0.0076
0.00
0.00
-42.10
383
0.0071
0.0062
0.00
0.00
-42.10
394
0.0086
0.0069
0.00
0.00
-42.10
404
0.0091
0.0059
0.00
0.00
-42.10
414
0.0073
0.0060
0.00
0.00
-42.10
424
0.0088
0.0066
0.00
0.00
-42.10
434
0.0077
0.0054
0.00
0.00
-42.10
aaa
0.0082
0.0061
0.00
0.00
-42.10
ass
0.0081
0.0057
0.00
0.00
-42.10
a6a
0.0072
O.00Sa
0.00
0.00
-42.10
a7a
o.0066
0.0071
0.00
0.00
-42.10
483
0.0082
0.0062
0.00
0.00
-42.10
a9a
o.007z
o.0060
0.03
0.01
-42.09
224.18
0.000
0.223
0.010
0.000
0.000
0.000
234.32
0.000
0.223
0.011
0.000
0.090
0.045
243.68
0.000
0.213
0.010
-0.004
0.000
0.000
254.21
0.000
0.213
0.012
-0.006
0.000
0.000
264.20
0.000
0.213
0.010
0.010
0.233
0.118
273.66
0.000
0.187
0.011
0.000
0.819
0.414
284.39
0.000
0.094
0.014
0.000
0.082
0.041
294.38
0.000
0.085
0.008
0.000
0.684
0.346
304.15
0.000
0.008
0.005
0.000
0.000
0.000
314.32
0.000
0.006
0.006
0.000
0.000
0.000
324.33
0.000
0.006
0.006
0.000
0.000
0.000
334.19
0.000
0.008
0.005
0.000
0.008
0.004
344.32
0.000
0.007
0.007
0.000
0.000
0.000
353.77
0.000
0.007
0.007
0.000
0.000
0.000
364.16
0.000
0.007
0.006
0.000
0.000
0.000
374.60
0.000
0.007
0.007
0.001
0.004
0.002
382.92
0.000
0.007
0.007
0.000
0.000
0.000
394.24
0.000
0.007
0.009
0.000
0.003
0.002
404.08
0.000
0.006
0.009
0.000
0.000
0.000
414.19
0.000
0.006
0.007
0.000
0.000
0.000
424.22
0.000
0.006
0.009
0.000
0.001
0.001
434.22
0.000
0.006
0.006
-0.001
0.000
0.000
444.22
0.000
0.006
0.008
0.000
0.000
0.000
454.24
0.000
0.006
0.008
0.000
0.000
0.000
464.22
0.000
0.006
0.007
-0.001
0.000
0.000
474.35
0.000
0.006
0.009
0.001
0.000
0.000
483.36
0.000
0.006
0.006
0.000
0.000
0.000
494.03
0.000
0.006
0.007
0.000
0.053
0.027
Ambient Flow Profile
Pumped
Flow Profile
Upwartl Flow,in GPM
Upward Flow,In GPM
•
h
f�
r
�I
1,
o
�
o
1�
1
1�
h
<
ll
r
1
r
e"11
r
•
GWA-FBRL FLASH

GWA-66RL FLASH Results and Individual Hydraulic Aperture Values
therefore no 3�-09
calibre ;a mm
It �L
o��o®
i 1
11
-
1W l�
0�®0®
00�
Open
Fractures Flow Layer in
Identified by FLASH
2]4 6
2]4
7
292
292
293 8
293
293
294
295
295
295
296
296
296 9
296
296
297
297
336 13
337
367 18
424 21
424
Flow Layer
In FLASH
AMBIENT FLOW
PUMPED FLOW
Depth (FT)
214
Q (GPM)
0.0100
Depth (FT)
214
Q (GPM)
0.2004
1
224
0.0103
224
0.2229
2
3
234
244
0.0109
0.0099
234
244
0.2229
0.2086
4
5
254
264
0.0122
0.0107
254
264
0.2069
0.2229
6
7
274
284
0.0114
0.0139
274
284
0.1865
0.0943
8
9
294
304
ON 0
0.0047
294
304
0.0849
0.0080
SO
11
314
324
0.0058
0.0060
314
324
0.0076
0.0079
12
334
0.0053
334
0.0082
13
344
0.0069
344
0.0069
14
354
0.0067
354
0.0067
15
364
0.0058
364
0.0067
16
375
0.0069
374
0.0076
17
383
0.0071
384
0.0062
18
394
0.0086
394
0.0069
19
404
0.0091
404
0.0059
20
414
0.0073
414
0.0060
21
424
0.0088
424
0.0066
22
434
0.0077
434
0.0054
23
444
1 0.0082
444
0.0061
24
454
0.0081
454
0.005]
25
464
0.0072
464
0.0054
26
474
0.0086
474
0.0071
27
483
0.0082
494
0.0062
28
494
0.0072
494
0.0060
Average 0.04
Total Transmissivity Calculated from Thiem Equation
E11
Q (9pm) ft d Drawdown, s (ft) Ro (tt) Rw (In) It. (ft) T taL tt'/da
0.2 38.5 28.9 1000 2.75 0.229 1.78
FLASH Total T and Fit Parameters
Radius of
Transmissivity,
Influence, R.
Tro-
MSE
Ah
F
(ft)
(ftz/day)
1000
1.98
3.8]E-OS
3.15E-03
3.90E-OS
Slu Test Information - Com feted in Com feted Wells
Screen Interval
ft b s
Screen Interval (ft Mid -point of Transmissivity
BTOR n interval ft2 da
ee---
Hydraulic
A enure m
Hydraulic
Conductivity
GWA-6BRL
ISO
29.48
190
0.21
2.96E+00
300
Notes:
1. Following a logarithmic sensitivity analysis of the FLASH model to radius of influence, a conservative value of 1000 feet was
used.
2. Objective function, F, for model incoporates mean squared error (MSE) between interpreted and predicted flow profiles and
the sum of squared differences (4h) between the borehole's water level and far -field heads. Model objective is to minimize F;
therefore, a value closer to zero indicates a better fit.
3. Model was run until no more iterations produced changes in output.
4. FLASH Software: Day -Lewis, F.D., Johnson, C. D., Pallet, F.L., and Halford, K.J, 2011, FLASH: A Computer Program for Flow -
Lag Analysis of Single Holes v1.0: U.S. Geological Survey Software Release, 07 March 2011,
5. FLASH Report: Day -Lewis, F.D., Johnson, C. D., Paillet, F.L., and Halford, K.J., 2011, A computer program for flow -log
analysis of single holes (FLASH): Ground Water, https://dx.doi.org/10.1111/j.1745-6584.2011.00798.,
6. Highlighted cells indicate Flow levels that do not have any observed open fractures and did not contribute to total
trensmissivity. These depth intervals were not used for fracture spacing versus depth below top of rock figure because it is
assumed that there are no fractures in these intervals.

Fractured Bedrock Evaluation
December 2019
Duke Energy Carolinas, LLC - Allen Steam Station
ATTACHMENT C
GEOPHYSICAL LOGGING REPORT
SynTerra

Solutions
821 Livingston Court, Suite E
Marietta, GA 30067
770.980.1002
Geophysical Logging Report
AB-10BRL, GWA-3BRL, GWA-4BRL, GWA-5BRL, and GWA-6BRL
Allen Steam Station, Gaston County, North Carolina
Performed for:
SynTerra
March 28, 2019
problem solved

Geophysical Logging Report, AB-10BRL, GWA-3BRL, GWA-4BRL, GWA-SBRL, and GWA-6BRL
Allen Steam Station, Gaston County, North Carolina
TABLE OF CONTENTS
Section Page
SignaturePage..................................................................................................................................ii
ExecutiveSummary.........................................................................................................................iii
1.0 Introduction........................................................................................................................... 1
2.0 Equipment and Methodology................................................................................................ 1
2.1 Acoustic Televiewer...................................................................................................... 1
2.2 Optical Televiewer........................................................................................................ 2
2.3 3-Arm Caliper................................................................................................................ 2
2.4 Fluid Temperature........................................................................................................ 2
2.5 Fluid Conductivity......................................................................................................... 2
2.6 Single Point Resistance(SPR)........................................................................................ 3
2.7 Spontaneous Potential (SP).......................................................................................... 3
2.8 Heat Pulse Flowmeter(HPF)......................................................................................... 3
3.0 Field Procedures.................................................................................................................... 3
4.0 Data Processing and Results.................................................................................................. 4
Appendices
Appendix 1
Appendix 2
Appendix 3
Appendix 4
Fracture Summary Table
Schmidt Stereonets and Rose Diagrams
Heat Pulse Flowmeter Logs and Fracture Characteristics
Geophysical Logs
problem solved

Geophysical Logging Report, AB-10BRL, GWA-3BRL, GWA-4BRL, GWA-5BRL, and GWA-6BRL March 28, 2019
Allen Steam Station, Gaston County, North Carolina (synt00118) Page ii
SIGNATURE PAGE
This report, entitled "Geophysical Logging Report — AB-10BRL, GWA-3BRL, GWA-4BRL, GWA-5BRL, and
GWA-6BRL, Allen Steam Station, Gaston County, North Carolina" has been prepared for SynTerra located in
Greenville, South Carolina. It has been prepared under the supervision of Mr. Jorgen Bergstrom at the
request of and the exclusive use of SynTerra. This report has been prepared in accordance with accepted
quality control practices and has been reviewed by the undersigned.
GEL Solutions, LLC
A Member of the GEL Group, Inc.
Jorgen Bergstrom, P.Gp.
Senior Geophysicist
Nicholas Rebman
Geophysical Specialist
March 28, 2019
Date
problem solved

Geophysical Logging Report, AB-10BRL, GWA-3BRL, GWA-4BRL, GWA-5BRL, and GWA-6BRL March 28, 2019
Allen Steam Station, Gaston County, North Carolina (synt00118) Page iii
EXECUTIVE SUMMARY
GEL Solutions performed geophysical borehole logging services in five borings located at Allen Steam
Station in Gaston County, North Carolina. The field investigations were performed between October 3, 2018
and January 4, 2019 during several, separate mobilizations. This investigation was conducted to aid SynTerra in
evaluating potential pathways for groundwater migration through fractured bedrock at the site. The
geophysical logs consisted of acoustic televiewer, optical televiewer, caliper, fluid conductivity, fluid
temperature, single point resistance (SPR), spontaneous potential (SP), and heat pulse flowmeter (HPF).
Logging of the top part of AB-10BRL and GWA-5BRL was conducted before setting the second casing, and
before reaching the total depth. Logging of the bottom part of AB-10BRL and GWA-5BRL was conducted after
setting the second casing and reaching the total depth. HPF logging was conducted under ambient conditions
for all wells, and under pumping conditions for all wells except GWA-3BRL since this boring exhibited artesian
conditions.
The logging data was analyzed to determine the location and orientation of fractures; and other features.
In addition to these data sets, synthetic caliper logs were calculated from the acoustic televiewer travel time
data to aid in the interpretation. The logs were analyzed for fractures and other features. Dip and azimuth (dip
direction) were calculated for each detected fracture based on the televiewer dataset. HPF data was analyzed
to detect water producing fractures.
problem solved

Geophysical Logging Report, AB-10BRL, GWA-3BRL, GWA-4BRL, GWA-SBRL, and GWA-6BRL March 28, 2019
Allen Steam Station, Gaston County, North Carolina (synt00118) Page 1
1.0 INTRODUCTION
GEL Solutions performed geophysical borehole logging services in five borings located at Allen Steam
Station in Gaston County, North Carolina. The geophysical logs consisted of acoustic and optical televiewer, 3-
arm caliper, fluid conductivity, fluid temperature, single point resistance (SPR), spontaneous potential (SP), and
heat pulse flowmeter (HPF). The field investigation was performed between October 3, 2018 and January 4,
2019. The logging data was analyzed to determine the location and orientation of fractures; and other
features. In addition to these data sets, synthetic caliper logs were calculated from the acoustic televiewer
travel time data to aid in the interpretation.
2.0 EQUIPMENT AND METHODOLOGY
The information below is an overview of the geophysical methodologies used for this investigation. The
intent of this overview is to give the reader a better understanding of each method, and background information
as to what is actually measured, the resolution of the method, and the limitations imposed by site -specific
subsurface conditions.
2.1 Acoustic Televiewer
Acoustic televiewer (ATV) logging produces a high resolution, magnetically oriented digital image of the
borehole wall to map the location and orientation of intersecting fractures, foliations, and lithologic contacts.
The Acoustic televiewer tool emits a rotating, narrow, acoustic beam that is reflected off the borehole wall.
The travel time and amplitude of the reflected wave are recorded by the tool and used to create borehole
images. Both datasets are useful for identifying the location and orientation of fractures. The amplitude of the
reflected signal will decrease at the location of fractures and the travel time will increase. The travel time data
can also be used for developing a high resolution caliper log for a more comprehensive analysis of fractures.
Acoustic televiewers can only be used in fluid filled boreholes. However, the fluid does not have to be optically
clear for the method to work.
When operating the ATV, a "time window" is set based on the borehole diameter. The time window is
the time interval in which the ATV instrument searches for an echo from the borehole wall. For smaller
increases in borehole diameter around fractures and sections of weaker rock, the ATV typically records an
accurate borehole diameter (correlates well with three -arm caliper data). However, if borehole openings are
problem solved

Geophysical Logging Report—AB-10BRL, GWA-3BRL, GWA-4BRL, GWA-5BRL, and GWA-6BRL March 28, 2019
Allen Steam Station, Gaston County, North Carolina (synt00118) Page 2
much larger than the borehole diameter, the echo from the borehole wall may fall outside the time window, or
be too weak to be detected. In these situations, borehole diameters recorded with ATV may be inaccurate.
Since ATV only records the reflection from the borehole wall, the data cannot be used to determine how far a
fracture extends from the borehole. The acoustic televiewer has a vertical resolution of 2 millimeters.
2.2 Optical Televiewer
Optical televiewer (OTV) logging is used to record and digitize a 360-degree color image of the borehole
wall. Planar features such as fractures, foliation, and lithologic contacts can be identified directly on the
images. The tool is magnetically oriented in order to determine the strike and dip of features. Televiewers
have a vertical resolution of 2mm, which is significantly better than many other geophysical tools. As a result,
it is able to see features other tools cannot resolve. Optical images can be collected above or below the water
surface, provided the water is sufficiently clear for viewing the borehole wall.
2.3 3-Arm Caliper
Caliper logging is used to generate a profile of the borehole diameter with depth. The tool measures the
borehole diameter using three spring -loaded arms. Narrow enlargements in the borehole diameter can, in
most cases, be attributed to fractures. Caliper logging can be conducted above and below the water surface.
2.4 Fluid Temperature
Fluid temperature logging is used to identify where water enters or exits the borehole. In the absence of
fluid flow, a gradual increase on water temperature of approximately 1°F per 100 feet of depth is expected.
Rapid changes in the fluid temperature indicate water -producing or water -receiving zones. Little or no
temperature gradient indicates intervals of vertical flow.
2.5 Fluid Conductivity
Fluid conductivity logging is used to measure the electrical conductivity of the fluid in the borehole.
Variations in fluid conductivity can be contributed to concentration variations of dissolved solids. These
differences can occur when sources of water have contrasting chemistry and have come from different
transmissive zones. Fluid temperature and conductivity are measured concurrently using the same logging
tool.
problem solved

Geophysical Logging Report—AB-10BRL, GWA-3BRL, GWA-4BRL, GWA-SBRL, and GWA-6BRL March 28, 2019
Allen Steam Station, Gaston County, North Carolina (synt00118) Page 3
2.6 Single Point Resistance (SPR)
Single point resistance logging involves passing an alternate current between a surface electrode and a
probe electrode and measuring the voltage difference created by the current. SPR is then calculated using
Ohm's law. SPR is the sum of cable resistance, and the resistance based on the composition of the medium,
the cross sectional area and length of the path through the medium. Therefore, the single point resistance log
does not provide quantitative data. In general, SPR increases with increasing grain size and decreases with
increasing borehole diameter, fracture density, and the concentration of dissolved solids in the water. Single -
point resistance logs are useful in the determination of lithology, water quality, and location of fracture zones
2.7 Spontaneous Potential (SP)
SP logging is conducted to measure naturally occurring voltage differences along a borehole. The
method has been found useful for delineating sandstone/shale layering and other boundaries between
permeable and impermeable beds. The measurements are made with reference to an electrode at ground
level. Therefore, SP logging does not provide quantitative data.
2.8 Heat Pulse Flowmeter (HPF)
HPF logging measures the direction and rate of vertical fluid flow in a borehole by heating up a small
volume of water and monitoring temperature variations as the heated water moves with the fluid flow in the
borehole. Under ambient conditions, differences in hydraulic head between two transmissive fractures
produce vertical flow in the borehole. However, if the hydraulic head is the same, no flow will occur under
ambient conditions. Therefore, HPF logging is also conducted under low -rate pumping conditions. HPF
readings are point readings at the location of fractures. The location and number of these readings can be
determined after analyzing the other geophysical logs for fractures. HPF can be used for measuring vertical
flows between 0.005 gallons per minute (gpm) and approximately 1.5 gpm. In HPF data, upward flow is shown
as positive flow, and downward flow is shown as negative flow.
3.0 FIELD PROCEDURES
All GEL Solutions activities on -site were supervised by a senior geophysicist. For this investigation, GEL
Solutions used a Mount Sopris Matrix logging system. Pumping tests during HPF testing were conducted using
a Grundfos Redi-Flow-2 water pump with variable speed control box and an in -situ Mini -Troll pressure
transducer with logging capabilities. The pump is placed in the casing above the open hole section of the
problem solved

Geophysical Logging Report-AB-1OBRL, GWA-3BRL, GWA-4BRL, GWA-5BRL, and GWA-6BRL March 28, 2019
Allen Steam Station, Gaston County, North Carolina (syntOO118) Page 4
borehole. HPF logging under pumping conditions commenced after the borehole water level had stabilized.
HPF logging was conducted at every 10 feet throughout the logging intervals under ambient and pumping
conditions. More closely spaced readings were then conducted at sections with abrupt changes in flow.
Logging of the top part of AB-10BRL and GWA-5BRL was conducted before setting the second casing, and
before reaching the total depth. Logging of the bottom part of AB-10BRL and GWA-513RL was conducted after
setting the second casing and reaching the total depth. HPF logging was conducted under ambient conditions
for all wells, and under pumping conditions for all wells except GWA-313RL since this boring exhibited artesian
conditions. A summary of the configuration of the boreholes, pumping rates, and water levels is provided
below. All depth measurements are referenced from the ground surface. All borings are surface cased and
open hole below the casing.
Logging Configuration Summary
Well ID:
AB-10BRL
(TOP)
AB-10BRL
(BOTTOM)
GWA-3BRL
GWA-4BRL
Casing material:
PVC
PVC
PVC
PVC
Casing diameter (in):
10.5
6.0
6.0
6.0
Open hole (ft):
47.8-201.3
201.1-500.3
211.7-471.9
179.1-499.8
Open hole diameter (in):
9.0
5.5
5.5
5.5
Pumping rate (gpm):
1.0
0.25
Artesian
well
0.2
Pump depth (ft):
14
50
N/A
40
Water level before pumping (ft):
6.3
3.5
N/A
8.3
Water level at equilibrium (ft):
9.0
34.2
N/A
32.1
Well ID:
GWA-5BRL
(TOP)
GWA-5BRL
(BOTTOM)
GWA-6BRL
Casing material:
PVC
PVC
PVC
Casing diameter (in):
10.0
6.0
6.0
Open hole (ft):
65.5-177.3
177.6-500.3
222.5-500.4
Open hole diameter (in):
9.0
5.5
5.5
Pumping rate (gpm):
1.1
1.0
0.2
Pump depth (ft):
30
30
80
Water level before pumping (ft):
10.8
1.2
42.1
Water level at equilibrium (ft):
12.6
7.5
71.0
problem solved

Geophysical Logging Report—AB-10BRL, GWA-3BRL, GWA-4BRL, GWA-5BRL, and GWA-6BRL March 28, 2019
Allen Steam Station, Gaston County, North Carolina (synt00118) Page 5
4.0 DATA PROCESSING AND RESULTS
The logs were analyzed for fractures and other features using WellCAD software, manufactured by
Advanced Logic Technology. The travel time data from the acoustic televiewer log was used to develop a
maximum caliper log. Fractures were interpreted through a complete data analysis of all logs. Dip and azimuth
(dip direction) were calculated for each detected fracture. The fracture data was corrected from apparent to
true dip and azimuth using deviation logs included with the televiewer dataset, and from magnetic north to
true north by rotating the fracture azimuths 7.3° counterclockwise. Magnetic north is 7.3° west of true north at
the site (according to National Oceanic and Atmospheric Administration). The reported azimuth is measured
clockwise from true north (Figure 1). A fracture summary table including fracture attributes is provided in
Appendix 1. Dominating water producing fractures based on flow logging or other evidence are highlighted and
shown in bold and italics text. Minor water producing fractures based on flow logging are shown in bold.
Schmidt stereonets (lower hemisphere) with fracture characteristics and fracture rose diagrams are
presented on Appendix 2. HPF logs and fracture characteristics are shown on Appendix 3. All logs are
presented on Appendix 4. All depths are referenced from ground surface.
vest
Fwst
Rela6ns beApm Dip and A�bvwb angle
Figure 1: Explanation of azimuth and dip for fractures
problem solved

APPENDIX 1

Allen Steam Station, Gaston County, North Carolina
Fracture Data from Geophysical Logging
AB-10BRL
AB-10BRL
GWA-3BRL
Depth
Azimuth
Dip
Depth
Azimuth
Dip
Depth
Azimuth
Dip
ft
deg
deg
ft
deg
deg
ft
deg
deg
56.5
276
0 Major blowout
185.7
349
64
212.0
358
6
66.1
341
23
186.0
108
53
213.0
120
43
68.5
238
35
187.4
254
24
216.1
162
26
69.6
300
41
191.3
242
14
216.3
344
85
72.4
172
36
192.0
348
5
217.4
255
20
74.3
146
64
192.6
181
59
217.9
359
82
77.8
113
71
193.2
143
20
218.8
358
2
80.3
73
11
194.4
351
5
'a
219.4
342
83
83.6
43
9
196.3
121
51
0
220.7
89
37
83.9
356
7
197.3
96
51
z
222.8
75
65
86.9
82
18
198.8
119
51
m
0
224.0
217
69
92.6
285
32
199.6
135
47
¢
225.1
75
64
92.7
248
80
200.7
340
75
227.6
160
25
92.8
77
46
202.8
229
68
227.8
159
22
93.2
99
14
205.2
229
79
0
233.2
79
53
93.3
131
78
205.5
106
53
0
237.6
100
36
93.7
338
9
210.9
153
48
CO
J
247.8
57
68
94.2
76
26
212.2
120
56
m
259.1
259
60
0
95.6
344
39
213.0
116
54
1
260.6
247
61
97.3
297
71
213.5
125
53
m
¢
271.2
128
6
97.5
154
83
213.8
110
57
271.8
329
86
97.7
161
26
214.8
191
69
285.4
19
35
99.1
315
37
221.8
178
24
292.5
230
73
104.1
314
30
236.0
274
34
293.9
309
88
104.5
6
78
239.8
239
49
310.6
23
23
106.0
254
7
248.3
333
60
318.5
95
68
106.4
186
9
249.7
80
36
330.6
86
65
107.3
139
25
250.9
329
50
335.7
119
79
107.7
7
67
251.0
330
47
338.8
107
83
110.0
249
23
257.2
295
38
345.1
339
25
113.6
131
10
279.3
94
49
347.5
293
65
115.4
353
8
280.3
159
33
347.6
20
46
116.4
300
52
281.6
277
83
347.7
341
23
121.3
123
6
287.8
113
80
348.4
332
86
121.4
134
17
295.0
167
27
349.2
289
57
129.2
332
1
295.2
112
49
349.5
292
62
129.6
285
37
297.0
124
65
350.0
336
1
131.7
113
62
298.1
110
30
350.6
48
25
132.7
137
42
301.0
92
26
350.7
292
83
135.2
231
52
305.5
95
65
352.5
356
16
141.3
330
50
305.7
318
70
352.8
291
62
142.2
125
45
305.9
84
63
353.4
281
67
142.2
129
32
310.2
143
30
353.9
169
53
142.3
123
46
317.0
90
47
354.1
344
69
146.2
331
9
322.9
123
67
355.0
45
78
146.6
336
16
324.1
152
61
355.3
297
71
147.9
199
46
332.4
95
47
355.7
99
77
149.3
339
31
332.9
171
53
364.2
286
56
151.3
232
66
337.4
272
74
364.6
280
59
152.5
233
61
344.1
116
36
367.9
158
22
155.8
73
19
350.5
327
8
374.7
298
53
158.5
62
25
352.0
113
45
377.2
216
30
160.4
76
43
356.9
293
80
377.9
172
27
160.7
194
62
359.8
139
12
378.4
220
27
161.5
187
29
362.5
311
37
379.2
194
31
163.8
325
26
364.0
339
72
379.6
228
34
168.0
334
63
365.6
348
86
383.7
82
77
168.1
32
56
369.1
49
33
395.8
278
79
169.3
231
27
408.8
281
35
396.5
286
82
169.3
266
62
415.3
160
76
414.2
139
80
170.3
226
24
440.9
149
81
427.9
25
60
173.4
136
s0
444.1
289
83
433.0
33
71
174.3
163
45
446.5
277
79
433.7
24
69
176.7
11
9
440.1
342
31
178.5
106
20
443.1
334
36
179.3
237
22
451.5
256
25
180.8
122
12
455.7
301
33
182.0
306
58
456.1
334
79
Major open fractures are highlighted and shown in bold and italics text. Minor open fractures are shown in bold. Closed fractures are shown in plain text.

Allen Steam Station, Gaston County, North Carolina
Fracture Data from Geophysical Logging
GWA-3BRL
GWA-4BRL
Depth
Azimuth
Dip
Depth
Azimuth
Dip
ft
deg
deg
ft
deg
deg
464.3
106
61
190.6
316
52
465.8
338
2
192.1
282
70
466.1
206
37
192.7
333
48
466.5
279
60
194.5
326
37
468.0
268
72
196.0
323
19
468.7
227
34
196.5
137
45
470.1
235
73
197.2
127
42
470.8
318
72
197.6
133
43
197.8
285
47
199.6
157
41
201.2
350
15 Porous Zone
201.8
159
30
201.9
163
34
208.5
333
23
209.3
352
19
212.8
36
79
212.9
313
20 Porous Zone
216.9
164
37
217.3
55
15
218.6
163
31
219.0
147
33
222.1
205
68
223.0
258
17
223.3
319
30
249.1
78
10
249.7
279
71
252.2
0
20
276.2
109
39
276.8
107
62
276.9
117
68
285.2
315
13
285.5
122
41
296.4
86
52
301.1
74
80
302.4
96
48
305.2
350
38
306.9
324
38
309.1
300
73
310.9
295
70
315.4
123
37
317.0
74
50
322.8
70
65
339.9
124
38
340.0
314
32
344.6
187
52
346.0
203
39
346.2
186
53
346.7
175
60
350.0
213
45
350.3
193
45
353.9
124
20
354.3
77
19
357.4
138
30
357.8
158
46
358.2
137
54
358.2
79
70
360.4
190
59
360.4
153
75
372.6
139
28
373.0
133
30
378.8
147
64
379.1
124
28
379.1
157
19
379.2
153
20
379.4
144
78
380.8
89
39
381.0
141
29
381.0
125
22
GWA-4BRL
Depth
Azimuth
Dip
ft
deg
deg
401.1
344
58
401.2
193
49
406.1
318
51
407.1
121
57
407.3
335
50
408.4
252
50
408.6
313
49
411.8
273
28
411.8
90
29
413.3
138
54
414.4
121
43
415.0
60
56
419.4
202
58
419.6
188
49
419.8
202
59
420.0
181
65
423.4
146
11
426.0
150
13
427.7
139
34
428.3
145
21
428.4
151
27
430.8
138
38
434.2
144
69
434.3
74
58
437.1
210
58
437.1
198
48
438.5
173
54
438.8
179
42
439.2
335
27
439.3
139
66
439.9
163
48
440.2
166
57
440.3
284
22
440.4
290
15
440.8
106
26
441.0
103
25
442.3
139
60
444.1
87
58
444.2
344
4
446.3
338
16
446.7
335
17
448.9
48
80
456.2
178
34
456.4
332
70
456.4
184
35
457.7
201
47
457.7
325
83
457.9
192
44
489.3
290
60
498.3
135
30
498.5
143
22
498.7
87
71
Major open fractures are highlighted and shown in bold and italics text. Minor open fractures are shown in bold. Closed fractures are shown in plain text.

Allen Steam Station, Gaston County, North Carolina
Fracture Data from Geophysical Logging
GWA-SBRL
GWA-5BRL
GWA-6BRL
Depth
Azimuth
Dip
Depth
Azimuth
Dip
Depth
Azimuth
Dip
ft
deg
deg
ft
deg
deg
ft
deg
deg
80.0
160
14
Major blowout
318.2
256
34
224.4
256
43
98.1
121
12
Major blowout
319.2
90
8
256.2
273
35
109.8
315
59
320.6
136
51
256.4
291
30
115.3
178
57
323.0
29
21
258.0
94
75
119.8
337
57
324.1
157
28
258.4
163
14
122.8
118
20
328.2
169
32
259.0
173
18
126.0
339
37
328.6
160
37
273.8
353
77
127.0
334
55
332.9
66
50
274.4
274
27
127.3
158
50
334.7
328
73
274.6
287
21
127.4
333
58
337.0
118
74
292.2
142
21
129.1
168
11
338.3
87
77
292.3
338
83
129.7
336
54
338.6
139
76
293.1
16S
27
131.9
308
44
0
339.6
73
56
293.1
326
39
133.3
104
28
0
340.1
52
58
293.4
157
31
138.0
300
42
m
340.6
73
54
294.4
322
6
161.5
138
20
¢
341.5
110
64
294.5
151
15
162.9
140
21
3�
341.9
140
52
295.0
251
63
176.9
95
84
343.8
107
72
295.4
246
75
181.9
75
26
344.0
111
74
295.7
242
71
189.3
133
69
345.1
146
66
296.0
57
62
189.8
122
80
347.5
93
76
296.1
244
64
194.5
279
13
348.0
146
61
296.2
69
57
199.0
110
27
N
348.5
355
40
296.3
267
60
200.3
332
78
3
348.6
198
2
296.5
259
62
224.0
7
7
350.0
281
22 Porous Zone
297.3
303
9
224.1
4
7
351.9
204
68
303.7
331
83
236.1
2
4
352.3
330
8
304.6
157
10
237.4
14
69
353.5
75
21
305.9
109
74
237.7
337
0
355.4
83
80
306.0
343
79
237.7
352
79
358.6
99
66
306.6
150
59
237.9
60
10
364.7
189
63
306.7
257
19
242.5
90
78
365.2
168
58
310.4
256
65
245.9
331
46
369.6
96
82
311.1
217
69
248.7
297
73
372.6
325
46 Porous Zone
312.1
244
61
249.4
344
56
373.1
108
67
312.5
241
60
253.2
332
53
373.7
341
60
319.2
323
11
257.6
338
30
Porous Zone
376.1
295
68
323.2
348
81
261.8
127
75
380.3
149
73
323.7
77
25
268.1
124
12
381.2
321
39 Porous Zone
324.4
166
20
268.3
160
32
383.0
351
14 Porous Zone
325.8
147
24
270.8
320
79
385.7
330
51
327.9
273
51
276.5
152
82
385.9
339
55
336.4
139
28
279.8
156
24
388.3
353
54
336.6
158
25
279.8
152
30
388.7
333
31
339.6
296
48
280.4
197
53
389.9
327
56
340.4
314
70
280.8
134
14
390.1
275
22
340.9
328
77
281.4
153
9
390.6
330
59
345.1
97
69
281.6
323
2
392.1
137
45
352.4
13
63
281.8
155
17
394.7
23
20
353.0
93
74
283.3
326
71
396.0
346
7 Porous Zone
362.8
283
26
287.0
326
82
396.6
26
18
378.0
291
78
289.0
165
26
396.9
348
6
380.6
314
66
293.9
327
74
401.8
288
68
382.8
276
63
294.3
106
37
408.1
24
44
387.5
114
58
295.9
335
67
408.2
139
76
401.1
244
81
297.4
93
83
430.1
21
49
402.1
350
64
302.2
91
85
434.9
130
76
404.6
357
61
306.2
143
74
443.1
57
76
405.5
331
66
309.1
325
68
474.0
330
65
409.6
297
65
309.5
276
36
480.9
51
73
411.7
330
53
310.4
336
43
492.3
140
20
413.2
92
74
310.8
102
68
497.7
51
79
417.7
189
66
310.8
138
66
420.1
326
66
315.3
325
82
421.0
263
71
316.5
310
5
421.3
82
77
316.5
170
31
421.7
260
67
316.6
165
25
422.2
264
66
317.6
326
49
423.3
17
67
Major open fractures are highlighted and shown in bold and italics text. Minor open fractures are shown in bold. Closed fractures are shown in plain text.

Allen Steam Station, Gaston County, North Carolina
Fracture Data from Geophysical Logging
GWA-6BRL
Depth
ft
Azimuth
deg
Dip
deg
423.6
144
25
423.7
154
33
423.9
159
30
424.3
281
80
424.8
322
68
428.7
350
52
430.4
326
81
437.1
278
54
438.7
275
58
441.3
315
68
442.3
266
44
443.7
266
57
447.4
325
63
452.5
105
63
453.2
110
84
454.5
46
52
454.6
44
52
456.1
103
83
456.3
117
56
458.2
146
63
463.9
347
74
466.1
354
76
469.5
266
45
470.7
272
40
472.3
338
62
473.3
336
57
475.7
338
74
485.8
143
64
491.1
137
52
494.4
68
72
494.9
85
74
495.2
114
56
497.4
111
53
Major open fractures are highlighted and shown in bold and italics text. Minor open fractures are shown in bold. Closed fractures are shown in plain text.

APPENDIX 2

Depth Fractures Poles - Dip - Lower Hemisphere Great Circles - Strike - Lower Hemisphere
1ft:600ft 0 90 Schmidt Plot - LH - Type Schmidt Plot (Strike) - LH - Type
25
50
75
100
Well ID:
125
AB-10BRL
150
Schmidt Plot - LH - Type Schmidt Plot (Strike) - LH - Type
175
Depth: 43.86 [ft] to 469.25 [ft] Depth: 43.86 [ft] to 468.66 [ft]
0' 0°
o eo
200
i
2 2 5
30 -3o-
10
•
270° 10-20-30 40-50-60-70a80 90° 270' 10 20Y30 40-50-60-70-8090°
250
r
275
300
-------- -----
80° 180°
Counts Dip[deg] Azi[deg] Counts Dip[deg] Strike[deg]
Mean 131 15.87 130.23 Mean 131 15.87 40.23
325
• 58 13.24 138.59 • 58 13.24 48.59
O 66 23.06 123.96 O 66 23.06 33.96
• 7 21.71 279.46 0 7 21.71 189.46
350
375
400
Major fracture
open
�— Minor open fracture
425
® Closed fracture
450
475
Page 1

Depth Fractures Poles - Dip - Lower Hemisphere Great Circles - Strike - Lower Hemisphere
1ft:600ft 0 90 Schmidt Plot - LH - Type Schmidt Plot (Strike) - LH - Type
175
Well
ID:
GWA-3BRL
200
225
250
Schmidt Plot - LH - Type
Schmidt Plot (Strike) - LH - Type
Depth: 173.78 [ft] to 492.48 [ft]
0"
Depth: 173.98 [ft] to 493.27 [ft]
0.
0
80
275
io
70
0
510
60
510
300
0
30
0
30
20 ®
20
10
10
I
325
270' O 10-20-30-40-500-70 80 90`
270' 10-20-30-40-50-60-70-80 90'
�
O
O
I I
350
O
375
180'
180'
Counts Dip[deg] Azi[deg]
Counts Dip[deg] Strike[deg]
Mean 76 36.23 289.89
Mean 76 36.23 199.89
400
69 46.11 297.43
— 69 46.11 207.43
O 4 31.48 245.80
O 4 31.48 155.80
425
• 3 23.89 217.75
0 3 23.89 127.75
450
Major
open fracture
475
Minor
open fracture
Closed
fracture
500
-
-LL
T
Page 1

Depth Fractures Poles - Dip - Lower Hemisphere Great Circles - Strike - Lower Hemisphere
1ft:500ft 0 90 Schmidt Plot - LH - Type Schmidt Plot (Strike) - LH - Type
175
Well ID:
AO
GWA-4BRL
200
225
250
Schmidt Plot - LH - Type Schmidt Plot (Strike) - LH - Type
275
Depth: 173.78 [ft] to 511.06 [ft] Depth: 173.98 [ft] to 511.38 [ft]
0° 0.
80 ..., 80 ' -\
O 70 // 0 ,
300
o _ o-
-�
30�i % 30
20
325
0 0
270° 10-2 30-40-50-80-70-80 90° 10
270. 0-30-40-501f 0-70-80 90'
O
350\�
375
180"------- 180'
Counts Dip[deg] Azi[deg] Counts Dip[deg] Strike[deg]
Mean 120 24.93 147.48 Mean 120 24.93 57.48
400
O 14 15.83 192.24 O 14 15.83 102.24
O 5 11.38 335.01 O 5 11.38 245.01
C' 101 28.23 144.99 101 28.23 54.99
425
Major open fracture
450
— Minor open fracture
Closed fracture
475
500
Page 1

Depth Fractures Poles - Dip - Lower Hemisphere Great Circles - Strike - Lower Hemisphere
1ft:600ft 0 90 Schmidt Plot - LH - Type Schmidt Plot (Strike) - LH - Type
75
100
Well
ID:
GWA-5BRL
125
150
175
200
Schmidt Plot - LH - Type
Schmidt Plot (Strike) - LH - Type
Depth: 64.76 [ft] to 516.14 [ft]
Depth: 64.37 [ft] to 516.14 [ft]
0°
225
0.
- o
0
0, S
b0250
�o
/i
30
30 �
20
275
270' 0 2 30 0-50-60-70-80 90°
I
270" 0 20—f30 0 50 70 80 90"
300
O
O ,
325
180,
180`
Counts Dip[deg] Azi[deg]
Counts Dip[deg] Strike[deg]
350
Mean 130 9.70 75.61
Mean 130 9.70 345.61
O 5 7.20 73.93
0 5 7.20 343.93
O 43 9.05 130.22
O 43 9.05 40.22
375
82 81.96 313.79
82 81.96 223.79
400
425
Major
open fracture
450
4&— Minor
open fracture
® Closed
fracture
475
500
Page 1

Depth Fractures Poles - Dip - Lower Hemisphere Great Circles - Strike - Lower Hemisphere
1ft:500ft 0 90 Schmidt Plot - LH - Type Schmidt Plot (Strike) - LH - Type
200
Well ID:
225
GWA-6BRL
250
275
Schmidt Plot - LH - Type Schmidt Plot (Strike) - LHI - Type
104
Depth: 195.77 [ft] to 511.06 [ft] Depth: 196.42 [ft] to 511.38 [ft]
o° o°
300
80
�70
o 0
�
50 50
0 yo
3 2 5
30 310
10 V -. -10 -.- -- ---- -
n
270° • 10-2 30�A0 50 0-70-SO 90° 270° IN10 20-30 40 50-60-70 '80 90°
350
375
�
80°
400
180°
Counts Dip[deg] Azi[deg] Counts Dip[deg] Strike[deg]
Mean 101 58.24 291.56 Mean 101 58.24 201.56
lip
77 67.30 298.51 77 67.30 208.51
0 12 33.85 150.40 0 12 33.85 60.40
425
12 23.59 249.38 0 12 23.59 159.38
46 Major open fracture
450
�— Minor open fracture
• Closed fracture
475
500
Page 1

Depth Fractures Poles - Dip - Lower Hemisphere Great Circles - Strike - Lower Hemisphere
1ft:700ft 0 90 Schmidt Plot - LH - Type Schmidt Plot (Strike) - LH - Type
50
75
ilk
100
Well ID:
ALL WELLS
125
150
175
Schmidt Plot - LH - Type Schmidt Plot (Strike) - LH - Type
Depth: 39.76 [ft] to 516.14 [ft] Depth: 39.37 [ft] to 516.14 [ft]
200
0° o°
0 ,..... ---- �-
70 -76--
fl I
225
\/
50 —50—
�\
3 30-`
250
zo zo
10 • o ,;�
270° 10 2 30 0 50 0-70 80 90° 270' 10 20 30-40 SO 60 70J-80 90°
I
275
I
�
O
300
N;��,.
325
- -
180° 180°
Counts Dip[deg] Azi[deg] Counts Dip[deg] Strike[deg]
350
Mean 558 13.57 134.22 Mean 558 13.57 44.22
O 131 13.82 145.93 O 131 13.82 55.93
375
- 395 26.12 125.14 395 26.12 35.14
• 32 9.41 256.38 • 32 9.41 166.38
400
425
Major open fracture
450
� — Minor open fracture
J Closed fracture
475
500
Page 1

Depth Fractures Rose Diagram - Dip Direction Rose Diagram - Dip
1ft:1000ft 0 90 Azimuth - Absolute (Count) Dip Count - Absolute (Count)
50
100
Azimuth -Absolute (Count)
Depth: 34.45 [ft] to 473.43 [ft]
150
0°
Well ID:
Dip Count -Absolute (Count) AB-10BRL
1 C
Depth: 34.45 [ft] to 473.75 [ft]
200
0°
10
45022226
250
300
Counts: 131.00
Mean (3D): 15.87
180'
Min: 0.40
Components: Azimuth
Max: 86.23
350
Ok
Counts: 131.00
Mean (3D): 130.23
Min: 5.89
Max: 356.13
400
450
Page 1

Depth Fractures Rose Diagram - Dip Direction Rose Diagram - Dip
1ft:1000ft 0 90 Azimuth - Absolute (Count) Dip Count - Absolute (Count)
150
200
Azimuth -Absolute (Count)
Depth: 163.32 [ft] to 530.51 [ft]
250
0°
Well ID:
Dip Count -Absolute (Count) GWA-3BRL
Depth: 163.98 [ft] to 530.51 [ft]
300
0°
14
8
1
350
- - 1 1,214
Counts: 76.00
400
Mean (3D): 36.23
180'
Min: 1.40
Components: Azimuth
Max: 88.33
Counts: 76.00
450
Mean (3D): 289.89
Min: 18.55
Max: 359.28
500
Page 1

Depth Fractures Rose Diagram - Dip Direction Rose Diagram - Dip
1ft:1000ft 0 90 Azimuth - Absolute (Count) Dip Count - Absolute (Count)
150
200
Azimuth -Absolute (Count)
Depth: 128.61 [ft] to 530.51 [ft]
0°
14
Dip Count -Absolute (Count)
250
Well ID:
Depth: 128.28 [ft] to 530.51 [ft]
GWA-4BRL
300
0°
1 e14A)!350
kF
11222
Counts: 120.00
Mean (3D): 24.93
400
180°
Min: 4.10
Components: Azimuth
Max: 82.60
Counts: 120.00
Mean (3D): 147.48
450
Min: 0.08
Max: 352.37
500
Page 1

Depth Fractures Rose Diagram - Dip Direction Rose Diagram - Dip
1ft:1000ft 0 90 Azimuth - Absolute (Count) Dip Count - Absolute (Count)
50
100
150
Well ID:
Azimuth -Absolute (Count)
GWA-5BRL
Depth: 57.41 [ft] to 520.67 [ft]
0°
200
0
Dip Count -Absolute (Count)
Depth: 58.07 [ft] to 521.65 [ft]
250
i
0°
i1 20
300
C1-112224
Counts: 130.00
350
-
Mean (3D): 9.70
180°
Min: 0.39
Components: Azimuth
Max: 85.52
Counts: 130.00
400
Mean (3D): 75.61
Min: 2.48
Max: 355.18
450
500
Page 1

Depth Fractures Rose Diagram - Dip Direction Rose Diagram - Dip
1ft:1000ft 0 90 Azimuth - Absolute (Count) Dip Count - Absolute (Count)
200
Azimuth -Absolute (Count)
Depth: 177.100[ft] to 530.51 [ft]
250
Well ID:
Dip Count -Absolute (Count) GWA-6BRL
Depth: 177.10 [ft] to 530.51 [ft]
300
0'
8
350
400
2226
Counts: 101.00
Mean (3D): 58.24
180°
Min: 5.92
Components: Azimuth
Max: 83.90
450
Counts: 101.00
Mean (3D): 291.56
Min: 12.63
Max: 357.28
500
Page 1

APPENDIX 3

Depth Caliper FracturesNoids HPF - Ambient
1ft:200ft 8 in 14 0 90 -0.01 gpm 0.2
Caliper - Long Arms HPF - Pumping
8 in 26 -0.01 gpm 0.2
Caliper - max from AN
8 in 14
40.0
Well
AB-10BRL
(Top)
ID:
Bottom of Casing
50.0
Major Blow -outs
Hole diameter more than
27 inches
60.0
70.0
$�'�
Major open fracture
�— Minor open fracture
Major Blow -outs and
sections of competent rock Closed fracture
Hole diameter up to
26 inches
90.0
100.0
110.0
lit
120.0
130.0
140.0
F
/7
-1
150.0
Page 1

160.0
170.0
180.0
190.0
200.0
Page 2

Depth Caliper Fractures HPF - Ambient
1ft:210ft 5 in 6 0 90 0 gpm 0.3
Caliper - max from AN HPF - Pumping
5 in 7 0 gpm 0.3
190.0
Well ID:
AB-10BRL
(Bottom)
200.0
Bottom of Casing
210.0
220.0
230.0
Major open fracture
4&— Minor open fracture
• Closed fracture
240.0
250.0
260.0
270.0
280.0
290.0
300.0
310.0
320.0
330.0
340.0
Page 1

350.0
360.0
370.0
380.0
390.0
400.0
410.0
420.0
430.0
440.0
450.0
460.0
470.0
480.0
490.0
Page 2

Depth Caliper Fractures HPF - Ambient
1ft:200ft 5 in. 6 0 90 0 gpm 1
Caliper - max from ATV
5 in 6
205.0
210.0
WELL ID:
GWA-3 BRL
Bottom of Casing
215.0
220.0
225.0
230.0
235.0
240.0
245.0
250.0
255.0
i Major open fracture
Minor open fracture
Closed fracture
260.0
265.0
270.0
275.0
280.0
285.0
290.0
295.0
300.0
305.0
310.0
315.0
320.0
325.0
330.0
335.0
340.0
345.0
Page 1

355.0
360.0
365.0
370.0
375.0
380.0
385.0
390.0
395.0
400.0
405.0
410.0
415.0
420.0
425.0
430.0
435.0
440.0
445.0
450.0
455.0
460.0
465.0
470.0
Page 2

Depth Caliper Fractures HPF - Ambient
1ft:250ft 5.2 in 6 0 90 0 gpm 0.2
Caliper- max from ATV HPF - Pumping
5.4 in 6.2 0 gpm 0.2
175.0
Well ID:
GWA-4 BRL
Bottom of Casing
180.0
185.0
190.0
195.0
200.0
205.0
210.0
215.0
220.0
225.0
230.0
l Major open fracture
Minor open fracture
® Closed fracture
235.0
240.0
245.0
250.0
40
255.0
260.0
265.0
270.0
275.0
280.0
285.0
290.0
295.0
300.0
305.0
310.0
315.0
320.0
325.0
330.0
335.0
340.0
345.0
350.0
355.0
Page 1

360.0
365.0
370.0
375.0
JET
380.0
\
385.0
390.0
9
395.0
i
400.0
405.0
410.0
415.0
420.0
425.0
430.0
435.0
440.0
445.0
450.0
455.0
460.0
465.0
470.0
475.0
480.0
485.0
490.0
495.0
500.0
Page 2

Depth Caliper - max from ATV Fractures HPF - Ambient
1ft:200ft 8 in 12 0 90 0 gpm 0.4
Caliper HPF - Pumping
8.5 in 11.5 0 gpm 0.4
60.0
Well ID:
GWA-513
Bottom of Casing
70.0
80.0
Major open fracture
�— Minor open fracture
Closed fracture
90.0
100.0
110.0
120.0
130.0
140.0
150.0
160.0
170.0
-
Page 1

Depth Caliper - max from ATV Fractures HPF - Ambient
1ft:200ft 5 in 7 0 90 -0.01 gpm 1
Caliper HPF - Pumping
5.2 in 6.5 -0.01 gpm 1
170.0
175.0
Well ID:
GWA-5BRL
Bottom
Bottom of Casing
180.0
185.0
190.0
195.0
200.0
205.0
210.0
Major open fracture
Minor open fracture
Closed fracture
215.0
220.0
225.0
230.0
235.0
240.0
245.0
250.0
255.0
260.0
265.0
270.0
275.0
280.0
285.0
290.0
295.0
Page 1

300.0
305.0
310.0
315.0
320.0
325.0
330.0
335.0
340.0
345.0
350.0
355.0
41
360.0
365.0
370.0
375.0
380.0
385.0
390.0
395.0
400.0
405.0
410.0
415.0
420.0
425.0
430.0
435.0
440.0
Page 2

450.0
455.0
460.0
465.0
470.0
475.0
480.0
485.0
490.0
495.0
500.0
Page 3

Depth Caliper - max from ATV Fractures HPF - Ambient
1ft:200ft 5.2 in 7 0 90 0 gpm 0.25
Caliper HPF - Pumping
5.2 in. 6 0 gpm 0.25
215.0
220.0
Well ID:
GWA-6 BRL
Bottom of Casing
225.0
230.0
41
235.0
240.0
245.0
250.0
255.0
Major open fracture
Minor open fracture
Closed fracture
260.0
265.0
270.0
275.0
280.0
285.0
290.0
295.0
300.0
305.0
310.0
315.0
320.0
325.0
330.0
335.0
340.0
345.0
350.0
355.0
Page 1

Depth Caliper - max from ATV Fractures HPF - Ambient
1ft:200ft 5.2 in 7 0 90 0 gpm 0.25
Caliper HPF - Pumping
5.2 in. 6 0 gpm 0.25
365.0
370.0
375.0
380.0
385.0
390.0
395.0
400.0
405.0
410.0
415.0
420.0
425.0
430.0
435.0
440.0
445.0
450.0
455.0
460.0
465.0
470.0
475.0
480.0
485.0
490.0
495.0
500.0
Page 2

APPENDIX 4

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Page 2

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Page 3

254.0
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Page 4

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Page 19

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Page 20

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Page 23

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Page 19

Fractured Bedrock Evaluation
December 2019
Duke Energy Carolinas, LLC - Allen Steam Station
ATTACHMENT D
SynTerra
PETROGRAPHIC EVALUATION OF CORE SAMPLES

Umm Lab
AESIA10012t arrnNaARl
PETROLEUM SERVICES
Petrographic Evaluation
Of Core Samples
SynTerra Corporation
Allen Deep Bedrock Project
September 2019
Core Laboratories, Inc.
Houston Advanced Technology Center
6316 Windfern Road
Houston, Texas 77040
Houston ATC Job File No.: 1902523G
The analytical results, opinions or interpretations contained in this report are based upon information and material supplied by the client for whose
exclusive and confidential use this report has been made. The analytical results, opinions or interpretations expressed represent the best judgment of
Core Laboratories. Core Laboratories, however, makes no warranty or representation, expressed or implied, of any type, and expressly disclaims
same as to the productivity, proper operations or profitableness of an oil, gas, coal or other mineral, property, well or sand in connection with which
such report is used or relied upon for any reason whatsoever. This report shall not be reproduced, in whole or in part, without the written approval of
Core Laboratories.

PETROGRAPHIC SUMMARY
Seven core samples from Allen Deep Bedrock project were selected for thin section
petrographic analysis (Table 1). The analytical program and petrographic summary
are presented in Table 1. Thin section photomicrographs and descriptions are
provided in Plates 1 — 7.
• Seven samples are all igneous rocks. Among them, five samples are
intrusive (plutonic), and two are extrusive (volcanic). The plutonic igneous
rocks are classified as quartz diorite and tonalite, based on the relative
abundances of minerals (quartz, alkali feldspar, and plagioclase). Two
volcanic rocks are classified as hornblende andesite (Table 1).
• The principal minerals are plagioclase, quartz, biotite, and amphibole.
Accessory minerals consist of K-feldspar, epidote, pyrite, magnetite, apatite,
and sphene.
• Many plagioclase crystals are altered into sericite/illitic clays. Biotite and
amphibole crystals are locally altered into chlorite. Fe -dolomite is rarely
observed in a couple of samples.
• Macropores are generally rare to minor, and consist of dissolution
intracrystal, moldic and fracture pores. Micropores are probably rare to minor
in abundance and associated with some illitic clays.
Thank you for choosing Core Laboratories to perform this study. Please feel free
to contact us if you have any questions or comments concerning this report.
Sincerely,
Yong Q. Wu PhD
Staff Geologist
Reservoir Geology
Core Laboratories - Houston
Phone: [phone]
E-mail: Yong.Wu(@corelab.com

ANALYTICAL PROCEDURES
THIN SECTION PETROGRAPHY
Thin sections were prepared by first impregnating the samples with epoxy to augment
cohesion and to prevent loss of material during grinding. Each thinly sliced sample was
mounted on a frosted glass slide and then grounded to an approximate thickness of 30
microns. The thin sections were stained with the following: Alizarin Red-S to
differentiate calcite (stains red) from clear dolomite (does not stain); potassium
ferricyanide to identify ferroan dolomite (stains dark blue) and ferroan calcite (stains
purple to dark blue depending on acid concentration and iron content of the sample).
They were also stained with sodium cobaltinitrite for potassium feldspar (stains yellow).
The thin sections were analyzed using standard petrographic techniques.
Igneous rock classification scheme (excluding volcanic) is as follows (Q = quartz; A =
alkali feldspar; P = plagioclase; F = feldspathoid):
qualu
alkah feldspar
Syen11P
alkalifeklspar S
syenife A
fa���ng
alkali r,.0 par
syenlfe
0
F
quadx diorlie
rplariz gabhrn
quarizarnorthome
gabbro
diorite
P anorthosite
fd,&Lwar ing gabbre
foid bearingdionle
foid-bearing wWh&we

TABLE 1
SynTerra Corp., Allen Deep Bedrock Project
ANALYTICAL PROGRAM AND SAMPLE SUMMARY
Sample No.:
Depth (ft):
TS
Lithology:
Classification:
Plate No.
GWA-5BR
135.0
X
Igneous Rock
Quartz diorite
1
GWA-613R
138.0
X
Igneous Rock
Quartz diorite
2
GWA-5BR
161.5
X
Igneous Rock (Volcanic)
Hornblende andesite
3
AB-22BR
174.5
X
Igneous Rock (Volcanic)
Hornblende andesite
4
GWA-6BR
190.0
X
Igneous Rock
Quartz diorite
5
AB-22BR
204.0
X
Igneous Rock
Quartz diorite
6
AB-22BRL
246.0
X
Igneous Rock
Tonalite
7

PLATE 1
Thin Section Petrography
Company: SynTerra Corp.
Project: Allen Deep Bedrock
Location: na
Sample No.: GWA-5BR
Depth (ft): 135.0
A
AW
F
17
Mag (l y
Sample Description
Lithology: Igneous Rock
Classification: Quartz diorite
Crystal Size (mm): 2.10
Structures:
massive
Principal Minerals:
abundant plagioclase; moderate quartz; minor amphibole;
minor biotite
Accessory Minerals:
rare to minor magnetite, pyrite, epidote, sphene, and apatite
OrPlag/Ser Alteration and Replacement:
Q' moderate plagioclase crystals are altered into sericite
" - 1 mm and/or illitic clays; rare biotite and amphibole crystals are
altered into chlorite; rare Fe -dolomite
i
.P
s yd.r•"-�.. .�' .� ice' ,
t
� 9
Relative Abundances:
Rare
<1 %
Minor
1-5%
Moderate
5-10%
Common
10-20%
HESERVOIR Abundant
>20%
Pore Types:
no visible pores
Photomicrograph Caption
The principal minerals are plagioclase (Plag), quartz (Q),
amphibole (Am), and biotite (Bi) in this igneous rock (quartz
diorite). These mineral crystals show an interlocking fabric.
Accessory minerals are epidote (Ep), magnetite (Mag),
pyrite, apatite, and sphene. Moderate plagioclase is altered
into sericite/illitic clays (Ser). Macropores are absent.
Micropores are probably rare to minor in abundance and
associated with some illitic clays. The green box in Image A
indicates the location of Image B.

Company: SynTerra Corp.
Project: Allen Deep Bedrock
Location: na
Sample No.: GWA-6BR
Depth (ft): 138.0
A
lag ^ Fr
PLATE 2
Thin Section Petrography
Sample Description
Lithology: Igneous Rock
Classification: Quartz diorite
Crystal Size (mm): 1.30
Structures:
massive, fractures
B
KF Plag a
Relative Abundances:
Rare
<1 %
Minor
1-5%
Moderate
5-10%
Common
10-20%
HESERVOIR Abundant
>20%
r
�_- Principal Minerals:
abundant plagioclase; common quartz; minor amphibole;
minor biotite
KF
Mag Accessory Minerals:
L,- rare to minor K-feldspar, magnetite, pyrite, epidote, and
apatite
Plag
Alteration and Replacement:
minor plagioclase crystals are altered into sericite and/or
1 mm illitic clays
Pore Types:
minor to moderate fracture pores; rare dissolution
intracrystal pores
Photomicrograph Caption
Plagioclase (Plag), quartz (Q), biotite (Bi), and amphibole
(Am) are the principal minerals in this igneous rock (quartz
diorite). These mineral crystals show an interlocking fabric.
Accessory minerals consist of epidote (Ep), K-feldspar (KF;
stained yellow), pyrite, magnetite (Mag), and apatite. The
plagioclase is locally altered into sericite/illitic clays (Ser).
Fracture pores (Fr) are widely distributed. Micropores are
probably rare to minor in abundance and associated with
some illitic clays. The green box in Image A indicates the
location of Image B.

PLATE 3
Thin Section Petrography
Company: SynTerra Corp. Sample Description
Project: Allen Deep Bedrock Lithology: Igneous Rock (Volcanic)
Location: na
Sample No.: GWA-5BR Classification: Hornblende andesite
Depth (ft): 161.5 Crystal Size (mm): 0.11
Structures:
A massive
B
Relative Abundances:
Rare
<1 %
Minor
1-5%
Moderate
5-10%
Common
10-20%
HESERVOIR Abundant
>20%
Principal Minerals:
abundant amphibole; common biotite; common plagioclase;
moderate epidote; minor quartz
Accessory Minerals:
rare to minor magnetite, pyrite, sphene, and apatite
Alteration and Replacement:
rare plagioclase crystals are altered into sericite and/or illitic
clays
Pore Types:
rare dissolution intracrystal and moldic pores
Photomicrograph Caption
This igneous rock is extrusive (volcanic), and classifies as
hornblende andesite. Amphibole (Am; hornblende) is the
most abundant mineral, followed by biotite (Bi), plagioclase
(Plag), epidote (Ep), and quartz (Q). These mineral crystals
show an interlocking fabric, and have an average crystal
size of 0.11 mm. Accessory minerals are pyrite (Py),
magnetite, sphene, and apatite. Dissolution
intracrystal/moldic pores are rarely observed. Micropores
are probably rare to minor in abundance. The green box in
Image A indicates the location of Image B.

PLATE 4
Thin Section Petrography
Company: SynTerra Corp. Sample Description
Project: Allen Deep Bedrock Lithology: Igneous Rock (Volcanic)
Location: na
Sample No.: AB-22BR Classification: Hornblende andesite
Depth (ft): 174.5 Crystal Size (mm): 0.38
Structures:
A massive
B
Relative Abundances:
Rare
<1 %
Minor
1-5%
Moderate
5-10%
Common
10-20%
HESERVOIR Abundant
>20%
Principal Minerals:
abundant amphibole; abundant plagioclase; moderate
biotite; minor quartz
Accessory Minerals:
rare to minor magnetite, pyrite, epidote, sphene, and apatite
Alteration and Replacement:
abundant plagioclase crystals are altered into sericite
and/or illitic clays; rare Fe -dolomite
Pore Types:
rare dissolution intracrystal pores
Photomicrograph Caption
This igneous rock is extrusive (volcanic), and is hornblende
andesite. Amphibole (Am; hornblende) and plagioclase
(Plag) are the most abundant minerals; biotite (Bi) and
quartz (Q) are less common. These mineral crystals show
an interlocking fabric. Accessory minerals are magnetite,
pyrite, epidote, sphene, and apatite. Plagioclase crystals
are extensively altered into sericite/illitic clays (Ser). Fe -
dolomite (Fdol; stained blue) is locally observed.
Dissolution intracrystal/moldic pores are rare. Micropores
are probably rare to minor in abundance and associated
with some illitic clays. The green box in Image A indicates
the location of Image B.

PLATE 5
Thin Section Petrography
Company: SynTerra Corp.
Project: Allen Deep Bedrock
Location: na
Sample No.: GWA-6BR
Depth (ft): 190.0
A
Fr
o°
B
r�
40
:JKf
Mag p ,
h,. Plag/Ser,�
,y
Q err
((� Pleg/$err a
mm
Plag
,.
Relative Abundances:
Rare
<1 %
Minor
1-5%
Moderate
5-10%
Common
10-20%
HESERVOIR Abundant
>20%
Sample Description
Lithology: Igneous Rock
Classification: Quartz diorite
Crystal Size (mm): 1.60
Structures:
massive, fractures
Principal Minerals:
abundant plagioclase; common quartz; moderate biotite;
minor amphibole
Accessory Minerals:
rare to minor K-feldspar, magnetite, pyrite, epidote, and
apatite
Alteration and Replacement:
moderate plagioclase crystals are altered into sericite
and/or illitic clays
Pore Types:
minor fracture pores; rare dissolution intracrystal pores
Photomicrograph Caption
This igneous rock is classified as quartz diorite. Plagioclase
(Plag), quartz (Q), biotite (Bi), and amphibole (Am) are the
principal minerals. These mineral crystals show an
interlocking fabric. Accessory minerals include epidote (Ep),
K-feldspar (KF; stained yellow), pyrite, magnetite (Mag),
and apatite. The plagioclase is locally altered into
sericite/illitic clays (Ser). Fracture pores (Fr) are widely
distributed and locally filled with illitic clays (Fr/clay).
Micropores are probably rare to minor in abundance and
associated with some illitic clays. The green box in Image A
indicates the location of Image B.

PLATE 6
Thin Section Petrography
Company: SynTerra Corp. Sample Description
Project: Allen Deep Bedrock Lithology: Igneous Rock
Location: na
Sample NO.: AB-22BR Classification: Quartz diorite
Depth (ft): 204.0 Crystal Size (mm): 1.70
Structures:
A massive, fractures
der
Q
r ,
1 mm
B
PlaAn
y',
yj.
Plag/ r'
y' Plag.
z ,
Relative Abundances:
Rare
<1 %
Minor
1-5%
Moderate
5-10%
Common
10-20%
HESERVOIR Abundant
>20%
Principal Minerals:
abundant plagioclase; common quartz; moderate
amphibole; moderate biotite
Accessory Minerals:
rare to minor K-feldspar, magnetite, pyrite, epidote, sphene
and apatite
Alteration and Replacement:
moderate plagioclase crystals are altered into sericite
and/or illitic clays
Pore Types:
rare fracture and dissolution intracrystal pores
Photomicrograph Caption
The principal minerals are plagioclase (Plag), quartz (Q),
amphibole (Am), and biotite (Bi) in this igneous rock (quartz
diorite). These mineral crystals show an interlocking fabric.
Accessory minerals are K-feldspar (KF; stained yellow),
epidote (Ep), magnetite (Mag), pyrite, apatite (Ap), and
sphene. Moderate plagioclase is altered into sericite/illitic
clays (Ser). Macropores are rare; micropores are probably
rare to minor in abundance and associated with some illitic
clays. The green box in Image A indicates the location of
Image B.

PLATE 7
Thin Section Petrography
Company: SynTerra Corp.
Project: Allen Deep Bedrock
Location: na
Sample No.: AB-22BRL
Depth (ft): 246.0
A
f' Pg/s�'er'
k"Aag/Ser F;
f�', Fr/clay
Q
B
Y
F�
Relative Abundances:
Rare
<1 %
Minor
1-5%
Moderate
5-10%
Common
10-20%
HESERVOIR Abundant
>20%
Sample Description
Lithology: Igneous Rock
Classification: Tonalite
Crystal Size (mm): 2.00
Structures:
massive, fractures
Principal Minerals:
abundant plagioclase; abundant quartz; minor to moderate
biotite
Accessory Minerals:
rare to minor K-feldspar, amphibole, magnetite, pyrite,
epidote, and apatite
Alteration and Replacement:
moderate to common plagioclase crystals are altered into
sericite and/or illitic clays; rare biotite and amphibole
crystals are altered into chlorite
Pore Types:
rare fracture and dissolution intracrystal pores
Photomicrograph Caption
Plagioclase (Plag), quartz (Q), and biotite (Bi) are the
principal minerals in this igneous rock (tonalite). These
mineral crystals show an interlocking fabric. Accessory
minerals consist of epidote (Ep), K-feldspar (KF; stained
yellow), amphibole (Am), pyrite, magnetite (Mag), and
apatite. Moderate to common plagioclase is altered into
sericite/illitic clays (Ser). Fracture are locally present and
filled with illitic clays (Fr/clay). Micropores are probably rare
to minor in abundance and associated with some illitic
clays. The green box in Image A indicates the location of
Image B.