NC0003468_FINAL_CSA Supplement 2_Appendix A_20160901

BORING NUMBER BG-10BR
440 S. Church Street, Suite 900
NC 28202-2075 PAGE 1 OF 5
���Charlotte,
Phone:[phone]
hdri nc. com/fol I ow -u s
CLIENT Duke Energy Carolinas PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT NUMBER 10026090 - 269372 PROJECT LOCATION Eden NC
DATE STARTED 6/9/16 COMPLETED 6/21/16 GROUND ELEVATION 595.688 ft HOLE SIZES) 10.25 inches
DRILLING CONTRACTOR S&ME, Inc. NORTHING 1788864.378 FASTING 1001770.233
DRILLING METHOD 6 1/4" ID HSA TMR PO Core HO Core GROUND WATER LEVELS:
LOGGED BY A. Pelletier CHECKED BY C. Hearn DATE/TIME ---
NOTES DATE/TIME ---
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MONDE RING
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'See BG -10D for lithology.
vance wi augers rom
surface.
5
10
15
20
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BORING NUMBER BG-10BR
440 S. Church Street, Suite 900
NC 28202-2075 PAGE 2 OF 5
���Charlotte,
Phone:[phone]
hdri nc. com/fol I ow -u s
CLIENT Duke Energy Carolinas PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT NUMBER 10026090 - 269372 PROJECT LOCATION Eden, NC
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'See BG -10D for lithology. (continued)
30
Auger refusal encountered. Set 5" PVC casing
to approx. 39' bgs and grouted in.
35
40
RC - 1
63
63
SANDSTONE, strong, dusky red (10R 3/2) and
dark gray (N4), fine to coarse grained, thickly
bedded, fresh, competent, slightly to moderately
Begin PO coring at approx. 39.5' bgs
fractured, (WEATHERED/FRACTURED ROCK)
RC -2
98
72
45
RC -3
100
74
50

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BORING NUMBER BG-10BR
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 3 OF 5
Phone:[phone]
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hdrinc. com/follow-us
CLIENT Duke Energy Carolinas PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT NUMBER 10026090 - 269372 PROJECT LOCATION Eden, NC
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REMARKS
MONDE RING
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SANDSTONE, strong, dusky red (10R 3/2) and
dark gray (N4), fine to coarse grained, thickly
bedded, fresh, competent, slightly to moderately
fractured, (WEATHERED/FRACTURED ROCK)
(continued)
RC -4
100
90
55
Continued: dark greenish gray (10Y 4/2)
Set 4" PVC casing to approx. 55' and grouted
in.
Begin HQ coring at approx. 55.4' bgs
RC - 5
100
88
SILTSTONE, strong, black (N2.5), thickly
bedded, fresh, competent, unfractured,
ROCK) J
59.2' - 79': some fractures are partial; do not
60
_(WEATHERED/FRACTURED _ _ _
SANDSTONE, strong, very dark grayish olive
bisect entire core and are Fe stained.
(10Y 3/2), fine to very fine grained, massive,
thickly bedded, fresh, competent, very slightly
fractured, contains few small mica flakes along
broken surfaces, (WEATHERED/FRACTURED
ROCK)
RC -6
94
94
65
RC - 7
98
98
70
70.4' - 80.4': some fractures in core runs RC -8
and RC -9 are healed with Quartz and no
longer open
��.
RC - 8
100
100
�:.
Stained fracture at 73.8' bgs
75

BORING NUMBER BG-10BR
440 S. Church Street, Suite 900
NC 28202-2075 PAGE 4 OF 5
���Charlotte,
Phone:[phone]
hdri nc. com/fol I ow -u s
CLIENT Duke Energy Carolinas PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT NUMBER 10026090 - 269372 PROJECT LOCATION Eden, NC
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MONDE RING
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SANDSTONE, strong, very dark grayish olive
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(10Y 3/2), fine to very fine grained, massive,
thickly bedded, fresh, competent, very slightly
fractured, contains few small mica flakes along
broken surfaces, (WEATHERED/FRACTURED
ROCK) (continued)
RC -9
100
100
��
Possible stained fracture at 78.1' bgs
SILTSTONE, strong, very dusky red(10R 2.5/2),
80
fresh, competent, very slightly fractured,
contains swirls of sandstone,
Stained fracture at 80' bgs
�.� �.�.'•
(WEATHERED/FRACTURED ROCK)
RC -
100
100
� •
10
i'.••�.
85
Continued: mixed with sandstone
RC -
100
100
11
i.'�, :'•
90
RC -
..
100
100
12
95
100

440 S. Church Street, Suite 900
���Charlotte, NC 28202-2075
Phone:[phone]
hdri nc. com/follow-u s
CLIENT Duke Energy Carolinas
PROJECT NUMBER 10026090 - 269372
R 3 I I 1100 1100
i[��.7
BORING NUMBER BG-10BR
PAGE50F5
PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT LOCATION Eden. NC
DESCRIPTION
SILTSTONE, strong, very dusky red(10R 2.5/2),
fresh, competent, very slightly fractured,
contains swirls of sandstone,
(WEATHERED/FRACTURED ROCK)
(continued)
Bottom of borehole at 105.4 feet.
REMARKS
Packer test attempted.
Packer test attempted.
Packer test attempted.
WELL
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BORING NUMBER BG-10BR
PAGE50F5
PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT LOCATION Eden. NC
DESCRIPTION
SILTSTONE, strong, very dusky red(10R 2.5/2),
fresh, competent, very slightly fractured,
contains swirls of sandstone,
(WEATHERED/FRACTURED ROCK)
(continued)
Bottom of borehole at 105.4 feet.
REMARKS
Packer test attempted.
Packer test attempted.
Packer test attempted.
WELL

Duke Energy Carolinas, LLC � Dan River -CSA Groundwater Assessment ���
Appendix A, Sample Photographs
Photo 1 — BG-10BR: Box 1 of 4 - Depth: 55.4' — 69.5' - Date: 06/15/16
T
4
Photo 2 — BG-10BR: Box 2 of 4 - Depth: 69.5' — 83.8' - Date: 06/15/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC � Dan River -CSA Groundwater Assessment ���
Appendix A, Sample Photographs
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Photo 3 — BG-10BR: Box 3 of 4 - Depth: 83.8' — 97.6' - Date: 06/15/16
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Photo 4 — BG-10BR: Box 4 of 4 - Depth: 97.6' — 105.4' - Date: 06/15/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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BORING NUMBER BG -10D
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 1 OF 3
Phone:[phone]
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hdrinc. com/follow-us
CLIENT Duke Energy Carolinas PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT NUMBER 10026090 - 269372 PROJECT LOCATION Eden, NC
DATE STARTED 6/7/16 COMPLETED 6/13/16 GROUND ELEVATION 596.196 ft HOLE SIZES) 10.25 inches
DRILLING CONTRACTOR S&ME, Inc. NORTHING 1788861.543 FASTING 1001784.819
DRILLING METHOD 6 1/4" ID HSA, TMR, PO Core GROUND WATER LEVELS:
LOGGED BY A. Pelletier CHECKED BY C. Hearn DATFJTIME -
NOTES DATE/TIME --
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(CH) Fat CLAY, reddish brown (2.5YR 4/4),
vanc wi augers rom
moist, high plasticity, cohesive, contains
surface.
organics and trace mica (SOIL)
(SM) Silty SAND, fine, reddish brown (5YR 5/4),
"Driller driving split spoon sampler 24" to
a -13-i s
moist, non -plastic, noncohesive, contains
ma�amize sample recovery; blows for last 6"
5
SS - 1
T2s)
24
organics and trace mica (SOIL)
Continued: dark reddish brown (5YR 3/3)
increment disregarded.
10
SS - 2
3-5-9
(ia)
24
Continued: brown (7.5YR 4/4), contains trace
2-s-�2
rootlets, organic matter, mica, and some clay
15
SS - 3
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24
constituent
Sample DRSS-BG-10D-15.5 collected
Continued: contains increased mica content
6-13-15
20
SS - 4
(2S)
24
--------------------
(SP) SAND, light brown (7.5YR 6/4), moist,
SS - 5
a-sois��
11
non -plastic, noncohesive, contains fine mica
25
(SAPROLITE)
Sample DRSS-BG-10D-24.4 collected

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BORING NUMBER BG -10D
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 2 OF 3
Phone:[phone]
��
hdrinc. com/follow-us
CLIENT Duke Energy Carolinas PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT NUMBER 10026090 - 269372 PROJECT LOCATION Eden, NC
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REMARKS
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Continued: contains larger mica flakes and higher
SS - 6
35-50/3"
9
degree of induration
30
Continued: moist to wet
SS - 7
30-50/1"
7
35
Continued: yellowish brown (2.5Y 6/4), moist to
SS - 8
e°
50/z„
SS - 9
wet, contains rock fragments of micaceous
40
sandstone
Continued: �
Sample DRSS-BG-10D-40.1 collected; a
�����
SANDSTONE, strong, brown (10YR 4/3), fine
composite of samples S-8 and S-9.
grained, thickly bedded, moderately
Auger and SPT refusal encountered at approx.
decomposed, competent, moderately to
40.1' bgs; begin PO coring.
'�
intensely fractured,
40.1' - 44.7: bedding at 45 degrees to core
,��.�
(WEATHERED/FRACTURED ROCK)
axis, fractures are both along bedding planes
and perpendicular to, abundant mica flakes
'�
exhibited along bedding plan fractures
'•
45
Continued: very dark grayish brown (10YR 3/2)
50

440 S. Church Street, Suite 900
���Charlotte, NC 28202-2075
Phone:[phone]
hdri nc. com/follow-u s
CLIENT Duke Energy Carolinas
PROJECT NUMBER 10026090 - 269372
BORING NUMBER BG -10D
PAGE30F3
PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT LOCATION Eden. NC
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DESCRIPTION
REMARKS
NION�LRING
material, contains angular Quartz and
Feldspar to 5mm
'� '� •�'
•;
up
•:
`�'
52.1' - 52.5': intensely weathered and friable
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iSANDSTONE, strong, brown (10YR 4/3), fine I
•�'���
55
grained, thickly bedded, moderately I
decomposed, competent, moderately to
intensely fractured,
(WEATHERED/FRACTURED ROCK)
(continued)
-------------------
SILTSTONE, strong, dusky red (10R 3/2), fine
grained, thickly bedded, fresh, competent,
slightly fractured, contains some mica on
fractured surfaces along bedding,
(WEATHERED/FRACTURED ROCK)
Bottom of borehole at 55.2 feet.

Duke Energy Carolinas, LLC � Dan River Steam Station -CSA Supplement II ���
Appendix A, Sample Photographs
� �� `�+`ve r She �w+ .��a f►ar
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Photo 1 — BG -10D
Depth: 0.0' - 3.5'
Date: 06/13/16
[3o�fwle 3Ca-ip7� }��
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�rii�A�e-l�7a�: �%y' HSA
��O+J 4.ovn�5 � *� — f 3 — �ID
�emer[!s � ..
-- ---�
Photo 2 — BG -10D: Sample SS -1 Depth: 3.5' - 5.0' Date: 06/13/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC � Dan River Steam Station -CSA Supplement II ���
Appendix A, Sample Photographs
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Photo 3 — BG -10D: Sample SS -2 Depth: 8.5' - 10.5' Date: 06/13/16
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i � ,{ �qs
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�ew.a r�S
►a�
- -- �
Photo 4 — BG -10D: Sample SS -3 Depth: 13.5' - 15.5' Date: 06/13/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC � Dan River Steam Station -CSA Supplement II ���
Appendix A, Sample Photographs
Uah �iVer ��t� ��{rW
i�oreFwle .�C7 ' flip
Dept ' is S' �
`�.Ci,
�,�, Dry f A ,Rt1fe-1;F[4(: fi//7�+4 � �S
_. �e�n&rI�.S
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Photo 5 — BG -10D: Sample SS -4 Depth: 18.5' - 20.5'
-J a � d 7 8 9
+� _: �i
"�7�n 'r?�'ve �- �+e awe �'�af►rx
$oreiwle �,G - iD'-�
p�p{�., X3.5'-� � � r
©rill �e�+od : � fy' NS;
�ew�e r�S _ I
Photo 6 — BG -10D: Sample SS -5 Depth: 23.5' - 24.4'
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
Fl
Date: 06/13/16
Date: 06/13/16

Duke Energy Carolinas, LLC � Dan River Steam Station -CSA Supplement II ���
Appendix A, Sample Photographs
��rn '�C�'�er ��� S�a�rx
�a+-ef.ole ,�G-IfJ7:P
D��,�F, � 28, 3'— Zg.p'
�rii# �e-N+� : (o'/y' NSA I
h'� W1� r� .
Photo 7 — BG -10D: Sample SS -6 Depth: 28.3' - 29.0' Date: 06/13/16
.r"'
L� a r� � 1 ve � � awr S�af►i�+
�o+��o le $ f - f D�D
D��� : 33.s= 3�.1
Photo 8 — BG -10D: Sample SS -7 Depth: 33.5' - 34.1' Date: 06/13/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC � Dan River Steam Station -CSA Supplement II ���
Appendix A, Sample Photographs
,p� 1 3 d 5__.—�- 7 8 9 � i 2 3 a 5 a 7
-. rr,r _ -
x _ - _ - k
.4 _`
�� fan 'fit"ver S�ea� .�-ist�ix
,'"� � Bar�o�e $5- r��
�' Dep -int : 38 5 �- 39. o'
Dr�fP ,�efko� : ��� �fSA
�E�nBfK� `
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Photo 9 — BG -10D: Sample SS -8 Depth: 38.5' - 39.0' Date: 06/13/16
., j 6 7 H 9 � 1 7 3 4 5 6 7 S 9
�BF� 'I�t��r �u� .��i�ar
B4►��►r� $�- roT
Uep-+� 39'.9 'id F'
�rifi,�fe�kad: ��y� X5+9
�e�.a r�S
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Photo 10 — BG -10D: Sample SS -9 Depth: 39.9' - 40.1' Date: 06/13/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC � Dan River Steam Station -CSA Supplement II - _ ;;;
Appendix A, Sample Photographs _ _
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Photo 11 — BG -10D: Sample Box 1 of 2 Depth: 40.1' - 50.2' Date: 06/13/16
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— - � s�
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Photo 12 — BG -10D: Sample Box 2 of 2 Depth: 50.2' - 55.2' Date: 06/13/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

BORING NUMBER BG -10S
440 S. Church Street, Suite 900
NC 28202-2075 PAGE 1 OF 2
���Charlotte,
Phone:[phone]
hdri nc. com/follow-u s
CLIENT Duke Energy Carolinas PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT NUMBER 10026090 - 269372 PROJECT LOCATION Eden, NC
DATE STARTED 6/9/16 COMPLETED 6/10/16 GROUND ELEVATION 596.047 ft HOLE SIZES) 8.25 inches
DRILLING CONTRACTOR S&ME, Inc. NORTHING 1788864.43 FASTING 1001777.515
DRILLING METHOD 4 1/4" ID HSA GROUND WATER LEVELS:
LOGGED BY A. Pelletier CHECKED BY C. Hearn DATE/TIME ---
NOTES DATE/TIME 6/10/2016 8:50:00 AM 21.75 ft / Elev 574.30 ft
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REMARKS
MONITORING
WELL
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5
1
10
15
20
25

BORING NUMBER BG -10S
440 S. Church Street, Suite 900
NC 28202-2075
PAGE 2 OF 2
���Charlotte,
Phone:[phone]
hdri nc. com/follow-u s
CLIENT Duke Energy Carolinas PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT NUMBER 10026090 - 269372 PROJECT LOCATION Eden, NC
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MONITORING
WELL
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'See BG -10D for lithology. (continued)
30
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35
40
Bottom of borehole at 40.0 feet.

BORING NUMBER GWA-5BRD
440 S. Church Street, Suite 900
NC 28202-2075 PAGE 1 OF 6
���Charlotte,
Phone:[phone]
hdri nc. com/follow-u s
CLIENT Duke Energy Carolinas PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT NUMBER 10026090 - 269372 PROJECT LOCATION Eden, NC
DATE STARTED 6/20/16 COMPLETED 7/7/16 GROUND ELEVATION 499.602 ft HOLE SIZES) 10.25 inches
DRILLING CONTRACTOR S&ME, Inc. NORTHING 1790975.672 FASTING 998976.8197
DRILLING METHOD 6 1/4" ID HSA, TMR, PO Core, HO Core GROUND WATER LEVELS:
LOGGED BY Brown/Bishuk CHECKED BY C. Hearn DATEITIME --
NOTES DATE/TIME 7/7/2016 8:10:00 AM 3.72 ft / Elev 495.88 ft
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DESCRIPTION
REMARKS
NION�LRING
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(ML) Sandy SILT with Gravel, strong brown
vance wi augers rom
(7.5YR 4/6), non -plastic, dry, noncohesive,
surface.
(FILL)
SPLP sample collected from SS -1.
1
SS -1
s -s-8
(1s)
18
5
(ML) Sandy SILT, yellowish brown (10YR 5/4),
non -plastic, dry, noncohesive, (SOIL)
SPLP sample collected from SS -2.
SS - 2
5-18-41
(59)
18
10
Continued: moist
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
SPLP sample collected from auger cuttings
SANDSTONE, very strong, mottled gray, red,
above refusal.
SS - 3
sae„
2
black and white, fine grained, massive, slightly
13.4' - 14': fractures, partially open, 5 and 25
RC - 1
100
78
weathered, (WEATHERED/FRACTURED
and 60 degrees, Fe and Mn coated
15
ROCK)
15.2': fracture, partially open, Mn coating and
Calcite mineralization
Auger and SPT refusal encountered at approx.
13.4' bgs. 5" PVC casing installed to 13.4' bgs
and grouted to surface. Begin PO coring.
95
82
Abundant subvertical Sandstone filled borrows
RC - 2
and associated boiturbation noted in multiple
runs below 16.2'.
16.7': fracture, 40 degree dip
17.5' - 19': fractures, 45 and 65 degree dips
20
20' - 22.2': Few subvertical fine grained
Continued: fine to medium grained, fresh to
Sandstone filled burrows; fractures, partially
slightly weathered
open, Mn coating and Calcite mineralization
RC - 3
98
93
25

BORING NUMBER GWA-5BRD
440 S. Church Street, Suite 900
NC 28202-2075 PAGE 2 OF 6
���Charlotte,
Phone:[phone]
hdri nc. com/follow-u s
CLIENT Duke Energy Carolinas PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT NUMBER 10026090 - 269372 PROJECT LOCATION Eden, NC
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SANDSTONE, very strong, mottled gray, red,
25.2' - 27': fractures, 30 and 75 degree dips
black and white, fine grained, massive, slightly
weathered, (WEATHERED/FRACTURED
ROCK) (continued)
Continued: fine to medium grained, fresh to
slightly weathered
27.3': fracture, 25 degree dip
RC -4
100
68
28' - 28.8': fractures, 30 and 60 degree dips
30
Continued: fresh to sli htl weathered
9 Y
30' - 30.2': fracture, 20 degree dip
RC - 5
100
93
33' - 33.5': fractures, partially open, 10 and 55
degree dips, Fe and Mn coating with Calcite
Continued: fresh
mineralization
33.5' - 33.8': fracture, partially open, 65 degree
35
dip, Fe and Mn coating with Calcite
mineralization
35' - 35.3': fractures, partially open, 30 degree
dips, Fe and Mn coating with Calcite
mineralization
36' - 36.8': fractures, partially open, 25 and 30
and 40 degree dips, Fe and Mn coating with
RC - 6
100
93
Calcite mineralization
37.5' and 38': fractures, partially open, 15
degree dip, Fe and Mn coating with Calcite
mineralization
40
38.3': fracture, partially open, 30 degree dip,
Fe and Mn coating with Calcite mineralization
39.5': fracture, partially open, 25 degree dip,
Fe and Mn coating with Calcite mineralization
41.4": fracture, partially open, 35 degree dip,
Mn coating
RC -7
100
100
45
44.5': fracture, partially open, 40 degree dip,
Mn coating
Continued: fine to medium grained
46': fracture, partially open, 50 degree dip, Mn
coating
46.1' - 55.2': abundant fractures, partially open
and closed, ranging from 30 to 75 degree dips,
RC - 8
97
83
Mn coating and Calcite mineralization
Continued: conglomeratic coarse grained,
laminated, fresh
50

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BORING NUMBER GWA-5BRD
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 3 OF 6
Phone:[phone]
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hdrinc. com/follow-us
CLIENT Duke Energy Carolinas PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT NUMBER 10026090 - 269372 PROJECT LOCATION Eden, NC
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REMARKS
MONDE RING
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SANDSTONE, very strong, mottled gray, red,
black and white, fine grained, massive, slightly
weathered, (WEATHERED/FRACTURED
ROCK) (continued)
Continued: conglomeratic coarse grained,
laminated, fresh
RC - 9
100
70
Continued: very fine to fine grained, locally
laminated otherwise massive,
55
RC -
100
79
10
60
RC-
11
100
100
4" PVC casing installed to approx 61' bgs and
grouted to surface. Begin HO coring.
Falling head permeability test conducted from
approx. 61' -65' bgs.
RC -
100
100
12
65
Falling head permeability test conducted from
approx 65' -70' bgs.
SILTSTONE, very strong, mottled gray and
black, very fine grained, massive to locally
66': fracture, partially open, 15 degree dip
laminated, slightly fresh,
(WEATHERED/FRACTURED ROCK)
RC -
100
93
13
SANDSTONE, very strong, mottled gray, black
and white, very fine to fine grained, massive to
locally laminated, fresh,
(WEATHERED/FRACTURED ROCK)
70
Falling head permeability test conducted from
approx. 70' -75' bgs.
RC -
100
87
14
75

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BORING NUMBER GWA-5BRD
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 4 OF 6
Phone:[phone]
��
hdrinc. com/follow-us
CLIENT Duke Energy Carolinas PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT NUMBER 10026090 - 269372 PROJECT LOCATION Eden, NC
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REMARKS
MONDE RING
p
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75
SANDSTONE, very strong, mottled gray, black
a ing ea permea i i y es con uc rom
and white, very fine to fine grained, massive to
approx 75' -80' bgs.
locally laminated, fresh,
(WEATHERED/FRACTURED ROCK)
(continued)
RC -
97
88
Continued:
15
80
RC -
100
93
Continued: fine to medium grained, massive
16
83' - 83.5': two intersecting fractures, partially
open, 25 and 35 degree dips, Calcite
mineralization
84': two intersecting fractures, partially open,
85
30 and 35 degree dips, Calcite mineralization
Falling head permeability test conducted from
approx. 85' -91.5' bgs.
85.5' - 86.5': two intersecting fractures,
partially open, 55 degree dip, Calcite
mineralization
RC -
100
86.7' - 87.7': fractures, closed, 50 and 55
1 �
— — — — — — — — — — — — — — — — — — — —
degree dips, Calcite mineralization
SILTSTONE, very strong, mottled gray and
gg.2�: fracture, partially open, 25 degree dip,
black, very fine grained, massive to locally
Calcite mineralization
laminated, fresh, (WEATHERED/FRACTURED
90
ROCK)
90.2': fracture, partially open, 40 degree dip,
RC -
18
78
61
— — — — — — — — — — — — — — — —
SANDSTONE, very strong, mottled gray, black
Calcite mineralization
and white, very fine to fine grained, massive to
90.5': fracture, partially open, 45 degree dip,
locally laminated, fresh,
Calcite mineralization
(WEATHERED/FRACTURED ROCK)
Falling head permeability test conducted from
approx 91.5' - 100' bgs.
92' - 92.7': fracture, partially open, 65 degree
RC -
gg
81
dip, Calcite mineralization
19
92.8' - 93.5': fracture, partially open, 40 degree
dip, Calcite mineralization
95
94.8' - 95.8': fracture, partially open, 55 degree
dip, Calcite mineralization
95.8' - 96.7': fracture, partially open, 60 degree
dip, Calcite mineralization
97' - 97.2': fracture, partially open, 55 degree
Continued: mottled gray and white, locally
dip, Calcite mineralization
RC -
100
92
conglomeratic medium to coarse grained
20
100
99.5' - 100.7': numerous fractures, closed,

BORING NUMBER GWA-5BRD
440 S. Church Street, Suite 900
NC 28202-2075 PAGE 5 OF 6
���Charlotte,
Phone:[phone]
hdri nc. com/follow-u s
CLIENT Duke Energy Carolinas PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT NUMBER 10026090 - 269372 PROJECT LOCATION Eden, NC
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REMARKS
NION�LRING
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100
SANDSTONE, very strong, mottled gray, black
ranging rom o egree ips, a ci e
and white, very fine to fine grained, massive to
mineralization
locally laminated, fresh,
100.5' - 101.5': fracture, partially open, 75
(WEATHERED/FRACTURED ROCK)
degree dip, Calcite mineralization
(continued)
101.5' - 102': three intersecting fractures, 25
Continued: laminated
and 30 and 40 degree dips
RC -
100
85
21
103.2' - 104.1': fracture, partially open, 60
degree dip, Calcite mineralization
105
106.7' - 108.1': two fractures, 70 degree dips
RC -
22
100
80
108.1' - 109': fracture, partially open, 65
degree dip, Calcite mineralization
110
110': fracture, partially open, 35 degree dip,
Calcite mineralization
110.5' - 110.8': two fractures, 65 degree dips
111' - 112': fracture, partially open, 65 degree
dip, Calcite mineralization
RC -
100
g7
Continued: very fine to coarse grained, locally
112.6': fault, 45 degree dip, serpentinized
23
laminated otherwise massive
slickensides
115
114.5': fracture, partially open, 25 degree dip,
Calcite mineralization
115' - 115.8': three intersecting fractures, 10
and 15 and 20 degree dips
Falling head permeability test conducted from
approx. 115.5' - 120.5' bgs.
116.5': fracture, partially open, 20 degree dip,
Calcite mineralization
RC -
85
77
24
118.2': fracture, partially open, 20 degree dip,
Calcite mineralization
120
121.7' - 123': cluster of three fractures, 15 and
35 and 45 degree dips
RC -
100
97
25
125
124.5': fracture, partially open, 40 degree dip,
i';

440 S. Church Street, Suite 900
���Charlotte, NC 28202-2075
Phone:[phone]
hdri nc. com/follow-u s
CLIENT Duke Energy Carolinas
PROJECT NUMBER 10026090 - 269372
RC -
26
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100 197
BORING NUMBER GWA-5BRD
PAGE60F6
PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT LOCATION Eden. NC
DESCRIPTION
SANDSTONE, very strong, mottled gray, black
and white, very fine to fine grained, massive to
locally laminated, fresh,
(WEATHERED/FRACTURED ROCK)
(continued)
Continued: conglomeratic medium to coarse
grained, locally laminated otherwise massive
Bottom of borehole at 130.5 feet.
REMARKS
125' - 125.5': two fractures, 45 degree dips
Falling head permeability test conducted from
approx. 125.5' - 130.5' bgs.
126': fracture, closed, 70 degree dip, Calcite
mineralization
127': fracture, partially open, 25 degree dip,
Calcite mineralization
126': fracture, closed, 65 degree dip, Calcite
mineralization
129' - 129.5': cluster of two fractures, closed,
50 and 60 degree dips, Calcite mineralization
WELL
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100 197
BORING NUMBER GWA-5BRD
PAGE60F6
PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT LOCATION Eden. NC
DESCRIPTION
SANDSTONE, very strong, mottled gray, black
and white, very fine to fine grained, massive to
locally laminated, fresh,
(WEATHERED/FRACTURED ROCK)
(continued)
Continued: conglomeratic medium to coarse
grained, locally laminated otherwise massive
Bottom of borehole at 130.5 feet.
REMARKS
125' - 125.5': two fractures, 45 degree dips
Falling head permeability test conducted from
approx. 125.5' - 130.5' bgs.
126': fracture, closed, 70 degree dip, Calcite
mineralization
127': fracture, partially open, 25 degree dip,
Calcite mineralization
126': fracture, closed, 65 degree dip, Calcite
mineralization
129' - 129.5': cluster of two fractures, closed,
50 and 60 degree dips, Calcite mineralization
WELL

BORING NUMBER GWA-16D
440 S. Church Street, Suite 900
NC 28202-2075 PAGE 1 OF 2
���Charlotte,
Phone:[phone]
hdri nc. com/fol I ow -u s
CLIENT Duke Energy Carolinas PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT NUMBER 10026090 - 269372 PROJECT LOCATION Eden, NC
DATE STARTED 6/13/16 COMPLETED 6/15/16 GROUND ELEVATION 502.182 ft HOLE SIZES) 10.25 inches
DRILLING CONTRACTOR S&ME, Inc. NORTHING 1791301.996 FASTING 998974.4843
DRILLING METHOD 6 1/4" ID HSA TMR PO Core GROUND WATER LEVELS:
LOGGED BY B. Doran CHECKED BY C. Hearn DATE/TIME ---
NOTES DATE/TIME 6/16/2016 9:40:00 AM 19.00 ft / Elev 483.18 ft
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DESCRIPTION
REMARKS
MONDE RING
D
°-U
mO��o
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vance wi augers rom
surface.
0' - 4': Contains roots
(ML) SILT with Sand, strong brown (7.5YR 4/6),
SS - 1
a -s-5
moist, non to low plasticity, cohesive, contains
5
��o)
18
fine sand and trace clay (SOIL)
--------------------
(CL) SANDY CLAY, strong brown (7.5YR 4/6),
SS 2
a 5 $
moist, medium plasticity, cohesive, contains fine
10
-
(�a)
18
sand (SOIL)
Continued: (SAPROLITE)
Trace Mn staining noted along relict structures
s-i2-ai
at approx.13.5'bgs.
SS - 3
�a3)
18
____________________
15
(SW) SAND, dark yellowish brown (10YR 4/6),
moist, non -plastic, noncohesive, contains
Very difficult drilling noted at approx. 15' bgs;
coarse gravel and Quartz (SAPROLITE)
through Quartz vein.
Continued: moist to dry
1
SS - 4
50/5"
5
Cuttings from below 19' appeared very dry.
20
Continued: dark greenish gray (10Y 4/1), dry
SS 5
5o-ai-
-
50/0"
8
6 1/4" HSA and SPT refusal at approx. 24.2'
SS - 6
50/0"
--------------------
25
b s.

440 S. Church Street, Suite 900
���Charlotte, NC 28202-2075
Phone:[phone]
hdri nc. com/follow-u s
CLIENT Duke Energy Carolinas
PROJECT NUMBER 10026090 - 269372
BORING NUMBER GWA-16D
PAGE20F2
PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT LOCATION Eden. NC
30
��7
� METADIABASE,strong to moderate, dark brown 5"" rvt; casing instauea to X4.4" ogs ana
(N4), fine phaneritic, massive grouted to surface on 6/15/16. Begin PO
(WEATHERED/FRACTURED ROCK) coring.
Intensely jointed, dip 20 - 80 degrees, tight to
_ 1 100 26 partially open, intensely Fe stained,
mineralized, slightly decomposed; from 24.4'
bgs.
SILTSTONE, moderate to strong, very dark gray 30.7' - 31.3': sheared, Fe stained, intensely
(N3), fine grained, massive jointed parallel to contact
100 60 (WEATHERED/FRACTURED ROCK) Fresh, moderately jointed, trace Fe staining;
from approx. 31.3' bgs.
100 192
METADIABASE,strong, dark gray (N4), fine
phaneritic, massive
(WEATHERED/FRACTURED ROCK)
Bottom of borehole at 39.4 feet.
36.1' - 36.4': 4+joints dipping 60 - 70 degrees,
parallel, tight to partially open, trace to
moderate Fe staining, some slickensided
surfaces on broken pieces (rubble)
Fresh and unjointed from approx. 36.4' bgs.
WELL
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DESCRIPTION
REMARKS
p
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a'
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30
��7
� METADIABASE,strong to moderate, dark brown 5"" rvt; casing instauea to X4.4" ogs ana
(N4), fine phaneritic, massive grouted to surface on 6/15/16. Begin PO
(WEATHERED/FRACTURED ROCK) coring.
Intensely jointed, dip 20 - 80 degrees, tight to
_ 1 100 26 partially open, intensely Fe stained,
mineralized, slightly decomposed; from 24.4'
bgs.
SILTSTONE, moderate to strong, very dark gray 30.7' - 31.3': sheared, Fe stained, intensely
(N3), fine grained, massive jointed parallel to contact
100 60 (WEATHERED/FRACTURED ROCK) Fresh, moderately jointed, trace Fe staining;
from approx. 31.3' bgs.
100 192
METADIABASE,strong, dark gray (N4), fine
phaneritic, massive
(WEATHERED/FRACTURED ROCK)
Bottom of borehole at 39.4 feet.
36.1' - 36.4': 4+joints dipping 60 - 70 degrees,
parallel, tight to partially open, trace to
moderate Fe staining, some slickensided
surfaces on broken pieces (rubble)
Fresh and unjointed from approx. 36.4' bgs.
WELL

BORING NUMBER GWA-16S
440 S. Church Street, Suite 900
NC 28202-2075 PAGE 1 OF 1
���Charlotte,
Phone:[phone]
hdri nc. com/follow-u s
CLIENT Duke Energy Carolinas PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT NUMBER 10026090 - 269372 PROJECT LOCATION Eden, NC
DATE STARTED 6/14/16 COMPLETED 6/14/16 GROUND ELEVATION 501.894 ft HOLE SIZES) 8.25 inches
DRILLING CONTRACTOR S&ME, Inc. NORTHING 1791301.944 FASTING 998967.2023
DRILLING METHOD 4 1/4" ID HSA GROUND WATER LEVELS:
LOGGED BY B. Doran CHECKED BY C. Hearn DATE/TIME ---
NOTES DATE/TIME 6/14/2016 7:20:00 AM 18.73 ft / Elev 483.16 ft
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DESCRIPTION
REMARKS
MONITORING
WELL
W
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surface.
5
1
��.
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10
15
20
.�:
Bottom of borehole at 24.0 feet.

440 S. Church Street, Suite 900 BORING NUMBER GWA-17D
���Charlotte, NC 28202-2075 PAGE 1 OF 2
Phone:[phone]
hdri nc. com/fol I ow -u s
CLIENT Duke Energy Carolinas PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT NUMBER 10026090 - 269372 PROJECT LOCATION Eden NC
DATE STARTED 6/13/16 COMPLETED 6/16/16 GROUND ELEVATION 511.507 ft HOLE SIZES) 11, 5 inches
DRILLING CONTRACTOR S&ME, Inc. NORTHING 1791157.973 FASTING 999390.6074
DRILLING METHOD 6 1/4" ID HSA TMR PO Core HO Core GROUND WATER LEVELS:
LOGGED BY M. Sheehan CHECKED BY C. Hearn DATE/TIME ---
NOTES DATE/TIME 6/16/2016 8:00:00 AM 19.50 ft / Elev 492.01 ft
N7
10
�N7
(ML) SILT, very stiff, reddish yellow (5YR 6/6),
moist, low plasticity, cohesive (SOIL)
15-10-10
SS - 1 (20) 18
Tree root in sample -Stiff drilling at 5'
Soil cutting balling at 7'
(ML) SILT, same as above, poor relict rock fabric Tree root in sample SPT -2, 2 inch soil recovery
SS - 2 10-s-12 (SAPROLITE)
(21) 18
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50/3"
15
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DESCRIPTION
REMARKS
MONDE R
D_p
mU>cnp
�p
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0
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�
�
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N7
10
�N7
(ML) SILT, very stiff, reddish yellow (5YR 6/6),
moist, low plasticity, cohesive (SOIL)
15-10-10
SS - 1 (20) 18
Tree root in sample -Stiff drilling at 5'
Soil cutting balling at 7'
(ML) SILT, same as above, poor relict rock fabric Tree root in sample SPT -2, 2 inch soil recovery
SS - 2 10-s-12 (SAPROLITE)
(21) 18
— — — — — — — — — — — — — — — — — — — —
SS - 4 16-50
(ML) SILT with Sand, hard, very pale brown Hole is dry
12 (10YR 7/3) to light brownish gray (10YR 6/2), Rig chatter at 20.5', Top of Rock at 20.5' 1
20 non -plastic, dry, non -cohesive, brittle, very -
uniform (SAPROLITE/POORLY WEATHERED
ROCK) _ _ _ _ _ _ _ _ _ _ _ _ _ _ _� 20.5-21.3': Weathered, subparallel fractures
SANDSTONE, strong to very strong, light gray
(10YR 7/1-7/2), fine grained, massive
(BEDROCK)
RC - 1 99 75
25
24.0': Joint, 80° dip, very narrow, FeOx �, �. �
staining �� ��
�.�c : �
12 -32 -
SS - 3
50/3"
15
— — — — — — — — — — — — — — — — — — — —
SS - 4 16-50
(ML) SILT with Sand, hard, very pale brown Hole is dry
12 (10YR 7/3) to light brownish gray (10YR 6/2), Rig chatter at 20.5', Top of Rock at 20.5' 1
20 non -plastic, dry, non -cohesive, brittle, very -
uniform (SAPROLITE/POORLY WEATHERED
ROCK) _ _ _ _ _ _ _ _ _ _ _ _ _ _ _� 20.5-21.3': Weathered, subparallel fractures
SANDSTONE, strong to very strong, light gray
(10YR 7/1-7/2), fine grained, massive
(BEDROCK)
RC - 1 99 75
25
24.0': Joint, 80° dip, very narrow, FeOx �, �. �
staining �� ��
�.�c : �

440 S. Church Street, Suite 900
���Charlotte, NC 28202-2075
Phone:[phone]
hdri nc. com/follow-u s
CLIENT Duke Energy Carolinas
PROJECT NUMBER 10026090 - 269372
_ �I I 193 198
30
BORING NUMBER GWA-17D
PAGE20F2
PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT LOCATION Eden. NC
DESCRIPTION
SANDSTONE, strong to very strong, light gray
(10YR 7/1-7/2), fine grained, massive
(BEDROCK) (continued)
Bottom of borehole at 30.5 feet.
REMARKS
very narrow,
staining
25.7': Joint
25.0': Joint, very narrow, FeOx staining
29.0': Joint, narrow, 80° dip, FeOx staining
WELL
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30
BORING NUMBER GWA-17D
PAGE20F2
PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT LOCATION Eden. NC
DESCRIPTION
SANDSTONE, strong to very strong, light gray
(10YR 7/1-7/2), fine grained, massive
(BEDROCK) (continued)
Bottom of borehole at 30.5 feet.
REMARKS
very narrow,
staining
25.7': Joint
25.0': Joint, very narrow, FeOx staining
29.0': Joint, narrow, 80° dip, FeOx staining
WELL

BORING NUMBER GWA-18D
440 S. Church Street, Suite 900
NC 28202-2075 PAGE 1 OF 3
���Charlotte,
Phone:[phone]
hdri nc. com/follow-u s
CLIENT Duke Energy Carolinas PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT NUMBER 10026090 - 269372 PROJECT LOCATION Eden, NC
DATE STARTED 6/6/16 COMPLETED 6/9/16 GROUND ELEVATION 594.88 ft HOLE SIZES) 10.25 inches
DRILLING CONTRACTOR S&ME, Inc. NORTHING 1790110.698 FASTING 1000526.883
DRILLING METHOD 6 1/4" ID HSA, TMR, PO Core GROUND WATER LEVELS:
LOGGED BY B. Doran CHECKED BY C. Hearn DATEITIME --
NOTES DATE/TIME --
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REMARKS
NION�LRING
p
m0
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O
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W
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0
(CL) CLAY with Sand, yellowish red (5YR 5/8),
vance wi augers rom
moist to dry, low plasticity, cohesive, micaceous
surface.
(SOIL)
--------------------
(ML) SILT with Sand, strong brown (7.5YR 5/8),
SPT -
6-12-18
1
�30>
dry, non -plastic, noncohesive, micaceous
5
(SOIL)
Continued: contains trace gravel
Trace Mn stainin noted forma rox. 8.8' b s
9 pP 9
SPT -
10-13-14
2
(27)
10
--------------------
(SP -SM) SAND with Silt, reddish yellow (7.5YR
SPT -
13(�9�43
6/6), dry, non -plastic, noncohesive, trace gravel
15
3
and mica, relict rock texture and MN filled joints
noted, friable (SAPROLITE)
Difficult drilling noted from approx. 15' - 18'
bgs.
Continued: contains increasing gravel of weak
Advanced with Tricone mud rotary with water
SPT -
sols^
4
siltstone and some percentage of silt
from 15' bgs.
Mn and Fe staining in relict planar structures
noted from approx. 16' bgs.
5" PVC casing installed to 17' bgs and grouted
to surface on 6/7/16. Begin PO coring at 18'
____________________
bgs on6/8/16.
RC - 1
60
0
SANDSTONE, moderate to weak, yellowish
18.8' - 35': Intensely fractured, joints 40 - 70
brown, fine to medium grained with silt, massive
degrees, tight to partially open, Mn
20
(WEATHERED/FRACTURED ROCK)
mineralized, highly decomposed
Continued: more fine grained with silt
21.3' - 22.2': Joints filled with (CH) Clay and
Mn
RC -2
100
26
25

BORING NUMBER GWA-18D
440 S. Church Street, Suite 900
NC 28202-2075 PAGE 2 OF 3
���Charlotte,
Phone:[phone]
hdri nc. com/follow-u s
CLIENT Duke Energy Carolinas PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT NUMBER 10026090 - 269372 PROJECT LOCATION Eden, NC
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DESCRIPTION
REMARKS
MONITORING
WELL
p
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25
SANDSTONE, moderate to weak, yellowish
brown, fine to medium grained with silt, massive
(WEATHERED/FRACTURED ROCK)
(continued)
RC -3
100
16
30
RC -4
98
38
35
34.5' - 36.5': Less fractured/jointed, abundant
small Mn filled voids and pockets
Rising head test conducted at 35' bgs.
From 36.5': Intensely jointed dip 40 - 70
degrees, partially open to tight, Mn mineralized
RC -5
100
32
40
From 40': Moderately fractured, highly
decomposed
Rising head test conducted at 40' bgs.
RC -6
100
60
45
Continued: more fine to medium grained
Intensely jointed from 45' bgs
Continued: weak
46.9' - 49': Likely zone of core loss; driller
��.
�':
RC - 7
66
10
reported extremely soft drilling
49' - 50': Recovered as residual soil; (SW) very
�.'�
50
pale brown, (10 YR 8/4) and yellowish brown

440 S. Church Street, Suite 900
���Charlotte, NC 28202-2075
Phone:[phone]
hdri nc. com/follow-u s
CLIENT Duke Energy Carolinas
PROJECT NUMBER 10026090 - 269372
o I e
Y � �
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60 I 8
BORING NUMBER GWA-18D
PAGE30F3
PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT LOCATION Eden. NC
DESCRIPTION
��(CH) CLAY, red (2.5YR 4/8), soft, wet, medium �
i plasticity, cohesive, contains trace sand (SOIL) �
SANDSTONE, moderate to weak, yellowish
brown, fine to medium grained with silt, massive
(WEATHERED/FRACTURED ROCK)
Bottom of borehole at 55.0 feet.
REMARKS
Rising head test conducted at 50' bgs.
Joint at 50.2' bgs; dip 50 degrees, tight, filled
with slickened clay, Fe stained
50.2' - 54': Fe stained
50.9' - 53'; Likely core loss, recovered as (CH)
clay
WELL
.•
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60 I 8
BORING NUMBER GWA-18D
PAGE30F3
PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT LOCATION Eden. NC
DESCRIPTION
��(CH) CLAY, red (2.5YR 4/8), soft, wet, medium �
i plasticity, cohesive, contains trace sand (SOIL) �
SANDSTONE, moderate to weak, yellowish
brown, fine to medium grained with silt, massive
(WEATHERED/FRACTURED ROCK)
Bottom of borehole at 55.0 feet.
REMARKS
Rising head test conducted at 50' bgs.
Joint at 50.2' bgs; dip 50 degrees, tight, filled
with slickened clay, Fe stained
50.2' - 54': Fe stained
50.9' - 53'; Likely core loss, recovered as (CH)
clay
WELL
.•
.'�'

BORING NUMBER GWA-20D
440 S. Church Street, Suite 900
NC 28202-2075 PAGE 1 OF 2
���Charlotte,
Phone:[phone]
hdri nc. com/follow-u s
CLIENT Duke Energy Carolinas PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT NUMBER 10026090 - 269372 PROJECT LOCATION Eden, NC
DATE STARTED 6/17/16 COMPLETED 6/23/16 GROUND ELEVATION 509.019 ft HOLE SIZES) 10.25 inches
DRILLING CONTRACTOR S&ME, Inc. NORTHING 1789494.634 FASTING 996631.6349
DRILLING METHOD 6 1/4" ID HSA, TMR, PO Core GROUND WATER LEVELS:
LOGGED BY B. Doran CHECKED BY C. Hearn � DATE/TIME 6/20/2016 1:20:00 PM 14.20 ft / Elev 494.82 ft
NOTES 1 DATE/TIME ---
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REMARKS
MONITORING
WELL
W
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vance wi augers rom
surface.
(SP) SAND, fine to medium, brown (7.5YR 4/4),
SS - 1
233
moist, non -plastic, noncohesive, trace silt and
5
�s>
16
mica (ALLUVIUM)
Continued:
3-4-4
SS - 2
�s>
18
10
Continued: fine grained, strong brown (7.5YR
SS 3
��oj
4/6), increasing silt content with depth
�
-
18
15
-------------
(SW) SAND, brown (7.5YR 4/6), moist
�
SS - 4
q3_g
(8)
16
20
non -plastic, noncohesive, (ALLUVIUM)
Continued: wet, contains gravel
s -s -s
SS - 5
(�a�
13
25

BORING NUMBER GWA-20D
440 S. Church Street, Suite 900
NC 28202-2075 PAGE 2 OF 2
���Charlotte,
Phone:[phone]
hdri nc. com/follow-u s
CLIENT Duke Energy Carolinas PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT NUMBER 10026090 - 269372 PROJECT LOCATION Eden, NC
LLJ �
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REMARKS
NION�LRING
p
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(SW) SAND, brown (7.5YR 4/6), moist,
non -plastic, noncohesive, (ALLUVIUM)
(continued)
Continued:
SS - 6
11-12-16
�2s>
14
--------------------
METADIABASE, moderate to strong, black
SPT refusal encountered at approx. 29' bgs.
SS - 7
soio��
30
0
(2.5N), fine grained, foliated,
�—(WEA_TH_ERE_D/FRACTURED ROCK) --- J
Switched to tricone rotary.
From approx 29.5'; Intensely to moderately
SANDSTONE, strong to moderate, dark grayish
jointed, joints/bedding dip 50 degrees, partially
brown (10YR 4/2), medium grained, medium to
open/disintegrated along joints, and Fe stained
thinly bedded, (WEATHERED/FRACTURED
29.8' - 30.1: Quartz vein
ROCK)
Tricone refusal encountered at approx. 30' bgs.
RC - 1
50
36
5" PVC casing set to approx. 29.5' bgs.
Grouted to surface on 6/21/16.
30.1' - 32.6': likely zone of core loss
Continued: moderate, gray (6N)
34.2' - 37: unfractured, fresh
100
100
35
RC -2
��.
♦�
37.2' - 37.9: moderately decomposed, jointed
'•
Continued: strong, laminated to thinly bedded
37.9' - 40.4: fresh, unfractured
40
40.4' - 41.5': probable core loss; bit clogged
with clay
—
two joints at approx 40.4' bgs dipping 50
••'
76
76
SILTSTONE, strong, very dark gray (3N), very
degrees, unknown aperture, intense Fe
•' �•
RC - 3
fine grained, massive, contains trace Mn
staining, mineralized
' • � '� •�'
throughout (WEATHERED/FRACTURED
41.5' - 49.5': fresh, unfractured
ROCK)
joint at approx 41.5' bgs dip 45 degrees,
unknown aperture, patchy Fe staining,
mineralized
, •; ::, �.'•
45
RC - 4
�:: �•.•.
'
�:'�.
90
90
Bottom of borehole at 49.5 feet.

BORING NUMBER GWA-20S
440 S. Church Street, Suite 900
NC 28202-2075 PAGE 1 OF 2
���Charlotte,
Phone:[phone]
hdri nc. com/follow-u s
CLIENT Duke Energy Carolinas PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT NUMBER 10026090 - 269372 PROJECT LOCATION Eden, NC
DATE STARTED 6/21/16 COMPLETED 6/23/16 GROUND ELEVATION 508.856 ft HOLE SIZES) 8.25 inches
DRILLING CONTRACTOR S&ME, Inc. NORTHING 1789503.48 FASTING 996635.2123
DRILLING METHOD 4 1/4" ID HSA GROUND WATER LEVELS:
LOGGED BY B. Doran CHECKED BY C. Hearn DATE/TIME ---
NOTES DATE/TIME ---
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REMARKS
MONITORING
WELL
W
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'See GWA-20D for lithology.
5
r:.
10
��.
�.'�
15
20
25

BORING NUMBER GWA-20S
440 S. Church Street, Suite 900
NC 28202-2075
PAGE 2 OF 2
���Charlotte,
Phone:[phone]
hdri nc. com/follow-u s
CLIENT Duke Energy Carolinas
PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT NUMBER 10026090 - 269372
PROJECT LOCATION Eden, NC
LLJ �
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REMARKS
NION�LRING
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�: •.�
Bottom of borehole at 25.5 feet.

BORING NUMBER MW-317BRL
440 S. Church Street, Suite 900
NC 28202-2075 PAGE 1 OF 8
���Charlotte,
Phone:[phone]
hdri nc. com/fol I ow -u s
CLIENT Duke Energy Carolinas PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT NUMBER 10026090 - 269372 PROJECT LOCATION Eden NC
DATE STARTED 6/21/16 COMPLETED 7/12/16 GROUND ELEVATION 568.389 ft HOLE SIZES) 10.25 inches
DRILLING CONTRACTOR S&ME, Inc. NORTHING 1788356.711 FASTING 999057.5948
DRILLING METHOD 6 1/4" ID HSA TMR PO Core HO Core GROUND WATER LEVELS:
LOGGED BY Brown/Campbell/Bishuk CHECKED BY C. Hearn DATE/TIME ---
NOTES DATE/TIME 7/12/2016 9:45:00 AM 17.55 ft / Elev 550.84 ft
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REMARKS
MONDE RING
D
°-U
mO��o
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UZ
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(ML) Sandy SILT with Gravel, yellowish brown
vance wi augers rom
(10YR 5/6), non -plastic, moist, noncohesive,
surface.
(FILL)
6-7-11
SS - 1
(1s)
13
5
Continued: contains trace ash
(SM) Silty SAND, dark gray (5Y 4/1), non -plastic,
moist, cohesive, (ASH)
--------------------
(SM) Silty SAND, yellowish brown (10YR 5/6),
non -plastic, moist, noncohesive, (SOIL)
8-7-11
SS - 2
(18)
6
10
--------------------
(SP) SAND, light yellowish brown (10YR 6/4)
SS 3
2-3-5
and grayish brown (10YR 4/2) and brownish
15
-
(8)
18
yellow (10YR 6/6), non -plastic, moist,
noncohesive, (SOIL)
Continued: wet
1
(SM) Silty SAND, yellowish brown (10YR 5/6),
SS - 4
4-8-10
(18)
18
20
non -plastic, wet, noncohesive, contains mica
and trace Mn staining in relict fractures, (SOIL)
Continued: moist
3-5-6
SS -5
(11)
17
25

BORING NUMBER MW-317BRL
440 S. Church Street, Suite 900
NC 28202-2075 PAGE 2 OF 8
���Charlotte,
Phone:[phone]
hdri nc. com/follow-u s
CLIENT Duke Energy Carolinas PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT NUMBER 10026090 - 269372 PROJECT LOCATION Eden, NC
LLJ �
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REMARKS
NION�LRING
p
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25
(SM) Silty SAND, yellowish brown (10YR 5/6),
non -plastic, wet, noncohesive, contains mica
and trace Mn staining in relict fractures, (SOIL)
(continued)
Continued: wet___________
SS - 6
14-14-28
�a2�
1 g
— — Y
(ML) SILT with Sand, light yellowish brown
30
(10YR 6/4), non -plastic, dry, noncohesive,
(SOIL)
Continued: mottled with light gray (GLEY1 7/N)
--------------------
(ML) SILT with Sand, weathered
SS - 7
2s -aa-
sols°
17
Siltstone/Mudstone, li ht ellowish brown 10YR
g y (
35
6/4) and gray (5Y 6/1), non -plastic, dry,
noncohesive, laminated and friable,
(SAPROLITE)
Auger and SPT refusal encountered at approx.
SS - 8
soio��
— — — — — — — — — — — — — —
0
SANDSTONE, strong, dark gray (GLEY1 4/N),
35.8' bgs.
fine grained, massive, fresh,
RC -1 unfractured
(WEATHERED/FRACTURED ROCK)
5" PVC casing installed at approx. 36' bgs and
RC - 1
94
94
grouted to surface. Begin PO coring.
40
4" PVC casing installed at approx. 36' bgs and
grouted to surface. Begin HO coring.
RC -2 unfractured
Continued: very dark gray (GLEY1 3/N)
RC - 2
88
88
44' - 45.6': zone of many weakly bound
45
fractures; likely opened by drilling
RC -3 unfractured, except joint at 47.8', 35
degrees, tight, minor clay like coating
RC -3
100
100
50

BORING NUMBER MW-317BRL
440 S. Church Street, Suite 900
NC 28202-2075 PAGE 3 OF 8
���Charlotte,
Phone:[phone]
hdri nc. com/fol I ow -u s
CLIENT Duke Energy Carolinas PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT NUMBER 10026090 - 269372 PROJECT LOCATION Eden, NC
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DESCRIPTION
REMARKS
MONDE RING
p
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m0��0
D'O
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D'
50
SANDSTONE, strong, dark gray (GLEY1 4/N),
fine grained, massive, fresh,
(WEATHERED/FRACTURED ROCK)
(continued)
Continued: gray (GLEY1 6/N)
RC - 4
100
92
Continued: dark gray (GLEY1 4/N)
52.3' - 53.2': fracture zone (likely mechanical),
55
RC -5 unfractured
RC -5
100
100
60
Continued: more competent
RC - s
98
87
— —
62.3' - 62.7': joints, 45 degrees, tight, clean,
SILTSTONE, strong, very dark gray (GLEY1
potentially mechanical
3/N), fine grained, massive, fresh,
(WEATHERED/FRACTURED ROCK)
65
RC -7 unfractured
RC -7
100
100
70
Many mechanical fractures along weak
laminations from 73.8' - 74.8' bgs
RC -8
92
92
75

BORING NUMBER MW-317BRL
440 S. Church Street, Suite 900
NC 28202-2075 PAGE 4 OF 8
���Charlotte,
Phone:[phone]
hdri nc. com/follow-u s
CLIENT Duke Energy Carolinas PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT NUMBER 10026090 - 269372 PROJECT LOCATION Eden, NC
LLJ �
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DESCRIPTION
REMARKS
NION�LRING
p
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75
MUDSTONE, strong, black (GLEY1 2.5/N), fine
75.5': foliation joint, 50 degrees, tight, clean,
grained, massive, fresh,
potentially mechanical
(WEATHERED/FRACTURED ROCK)
RC - 9
86
72
80
RC -10 unfractured
RC -
100
100
10
85
--------------------
SANDSTONE, strong, very dark gray (GLEY1
3/N), fine grained, laminated, fresh,
RC -11 unfractured
(WEATHERED/FRACTURED ROCK)
RC -
g6
96
11
--------------------
MUDSTONE, interbedded with Sandstone,
90
moderate to strong, black (GLEY1 2.5/N) and
RC -11 unfractured except for mechanical
very dark gray (GLEY1 3/N) ,fine grained,
breaks; along weak 40 degree carbonaceous
laminated, fresh, carbonaceous Mudstone,
foliation planes
(WEATHERED/FRACTURED ROCK)
Kaolonite on bedding plane
RC -
100
100
12
95
RC -13 unfractured except for mechanical
breaks; along weak foliation planes
--------------------
SANDSTONE, strong, dark gray (GLEY1 4/N),
fine grained with few medium grains, massive,
RC -
94
94
fresh, (WEATHERED/FRACTURED ROCK)
13
100

BORING NUMBER MW-317BRL
440 S. Church Street, Suite 900
NC 28202-2075 PAGE 5 OF 8
���Charlotte,
Phone:[phone]
hdri nc. com/follow-u s
CLIENT Duke Energy Carolinas PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT NUMBER 10026090 - 269372 PROJECT LOCATION Eden, NC
LLJ �
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to W
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DESCRIPTION
REMARKS
NION�LRING
p
m0
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100
SANDSTONE, strong, dark gray (GLEY1 4/N),
100.3': joint, 60 degrees, tight, calcite infill
fine grained with few medium grains, massive,
fresh, (WEATHERED/FRACTURED ROCK)
(continued)
RC -
g6
96
14
105
105.5': joint, 45 degrees, tight, quartz
mineralization
MUDSTONE, moderate to strong, very dark gray
RC -
(GLEY1 3/N), fine grained, laminated, fresh,
15
94
90
(WEATHERED/FRACTURED ROCK)
108': foliation joint, 55 degrees, tight, clean,
potentially mechanical
SANDSTONE, interbedded with Mudstone,
109': foliation joint, 55 degrees, tight, clean,
110
strong, dark gray (GLEY1 4/N) to very dark gray
(GLEY1 3/N), fine grained, laminated, fresh,
potentially mechanical
During Run RC -16, driller noted circulation
(WEATHERED/FRACTURED ROCK)
loss.
111' - 119.8'; Packer test conducted
RC -
16
gg
gg
112.2': joint, 70 degrees, tight, calcite
mineralization
112.6': joint, 55 degrees, tight, calcite
mineralization
115
115.6', 116.6' and 118.6': joints, 50 degrees,
tight, calcite mineralization
RC -
100
100
17
120
RC -18 unfractured
RC -
100
100
18
125

BORING NUMBER MW-317BRL
440 S. Church Street, Suite 900
NC 28202-2075 PAGE 6 OF 8
���Charlotte,
Phone:[phone]
hdri nc. com/fol I ow -u s
CLIENT Duke Energy Carolinas PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT NUMBER 10026090 - 269372 PROJECT LOCATION Eden, NC
LLI j
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REMARKS
MONDE RING
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125
SANDSTONE, interbedded with Mudstone,
- un rac ure
strong, dark gray (GLEY1 4/N) to very dark gray
(GLEY1 3/N), fine grained, laminated, fresh,
(WEATHERED/FRACTURED ROCK)
(continued)
RC -
100
100
19
130
RC -20 unfractured
RC -
100
100
20
135
RC -21 unfractured
RC -
100
100
21
140
RC -
98
98
22
143.6': foliation plane joint, 20 degrees, tight,
Continued: mottled dark reddish gray (10YR 4/1)
clean, potentially mechanical
145
and bluish gray (GLEY2 6/1 5B), laminated
145.2': joint, 50 degrees, tight, clean
146.8' - 149': calcite filled fenestra are
RC -
23
100
100
common
149' - 151': abundant soft sediment
150
deformations (distorted alternating laminations

BORING NUMBER MW-317BRL
440 S. Church Street, Suite 900
NC 28202-2075 PAGE 7 OF 8
���Charlotte,
Phone:[phone]
hdri nc. com/follow-u s
CLIENT Duke Energy Carolinas PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT NUMBER 10026090 - 269372 PROJECT LOCATION Eden, NC
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150
SANDSTONE, interbedded with Mudstone,
o an sone an i s one
strong, dark gray (GLEY1 4/N) to very dark gray
149.8' - 154': Siltstone and Mudstone
(GLEY1 3/N), fine grained, laminated, fresh,
interclasts common throughout. Primary
(WEATHERED/FRACTURED ROCK)
horizontal bedding dips 35-40 degrees.
RC -
24
100
100
(continued)
Continued: very strong, mottled colors, very fine
to fine grained, strong HCI reaction along
fracture surfaces
154' - 159.5': partially open fractures with
155
Calcite mineralization; 50 degree dip @ 151.1'
and 151.8' and 158', 45 degree dip @ 153', 60
degree dip @ 154.6'
RC -
100
100
25
160
Continued: conglomeratic fine to coarse grained
161.3' - 162' and 164.7' - 165': conglomerate
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beds consisting of coarse Sandstone grains
RC -
g6
96
and clasts of Plagioclase Feldspar and Quartz
26
162.8' - 163.1': distorted laminations present,
partially open fractures with Calcite
mineralization; 50 degree dip @ 160.5', 65
degree dip from 161.3' - 162', 35 degree dips
165
@ 162.4' and 163', 65 degree dip from 163.5' -
164'
164.7' - 165': serpentinized slickensided
fracture with 65-75 degree dip
166.4': fracture, open, 30 degree dip
RC -
100
100
27
170
170.3' - 172.2': distorted laminations abundant
RC-
100
100
-- --------------
172.2'-175': unfractured zone
28
SILTSTONE, grading to Sandstone, very strong,
mottled dusky red (7.5R 3/2) and greenish gray
(10GY 5/1), fine grained, massive, fresh,
(WEATHERED/FRACTURED ROCK)
r:.
175

440 S. Church Street, Suite 900
���Charlotte, NC 28202-2075
Phone:[phone]
hdri nc. com/follow-u s
CLIENT Duke Energy Carolinas
PROJECT NUMBER 10026090 - 269372
BORING NUMBER MW-317BRL
PAGE80F8
PROJECT NAME Dan River Post CSA Additional Assesment
PROJECT LOCATION Eden. NC
SILTSTONE, grading to Sandstone, very strong,
mottled dusky red (7.5R 3/2) and greenish gray
(10GY 5/1), fine grained, massive, fresh, 175.8' - 176.3': fracture, partially open, Calcite
(WEATHERED/FRACTURED ROCK) mineralization, 65 degree dip
(continued) 176' - 176.3': horizontal bedding planes dipping
RC - 100 86 45 degrees
29
SANDSTONE, very strong, gray (N5)and to
bluish gray (56 6/1) and white (N/9 and N8.5)
along fracture surfaces, medium to coarse
180 grained, massive, fresh, strong HCI reaction
along fractures
iE:l.�
3 0 I I 1100 196
RC - I I 1100 177
Bottom of borehole at 189.8 feet.
178': two intersecting fractures, 30 degree
dips, partially open, Calcite and Pyrite
mineralization
179.8': fracture, 50 degree dip
180.3' - 180.7': fracture, 70 degree dip
180.6' - 181': three intersecting fractures, 15,
30 and 65 degree dips, partially open
181.1': fracture, 55 degree dip, closed, Calcite
mineralization
181.7': fracture, 60 degree dip, partially open,
Calcite mineralization
182' - 183.7': fractures, 80-85 degree dip,
closed, Calcite mineralization
184.8', 186.8', 189' and 189.3': fractures, 55
degree dips, partially open, Calcite
mineralization
185.7 - 186': seven intersecting fractures,
ranging from 60-80 degree dips, closed,
Calcite mineralization
186.7': fracture, 55 degree dip, closed, Calcite
mineralization
187.2': fracture, 10 degree dip, closed, Calcite
mineralization
187.7': fracture, 60 degree dip, closed, Calcite
mineralization
two intersecting fractures at 189.6' and 189.
10 and 50 degree dips, partially open, Calcite
mineralization
WELL
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SILTSTONE, grading to Sandstone, very strong,
mottled dusky red (7.5R 3/2) and greenish gray
(10GY 5/1), fine grained, massive, fresh, 175.8' - 176.3': fracture, partially open, Calcite
(WEATHERED/FRACTURED ROCK) mineralization, 65 degree dip
(continued) 176' - 176.3': horizontal bedding planes dipping
RC - 100 86 45 degrees
29
SANDSTONE, very strong, gray (N5)and to
bluish gray (56 6/1) and white (N/9 and N8.5)
along fracture surfaces, medium to coarse
180 grained, massive, fresh, strong HCI reaction
along fractures
iE:l.�
3 0 I I 1100 196
RC - I I 1100 177
Bottom of borehole at 189.8 feet.
178': two intersecting fractures, 30 degree
dips, partially open, Calcite and Pyrite
mineralization
179.8': fracture, 50 degree dip
180.3' - 180.7': fracture, 70 degree dip
180.6' - 181': three intersecting fractures, 15,
30 and 65 degree dips, partially open
181.1': fracture, 55 degree dip, closed, Calcite
mineralization
181.7': fracture, 60 degree dip, partially open,
Calcite mineralization
182' - 183.7': fractures, 80-85 degree dip,
closed, Calcite mineralization
184.8', 186.8', 189' and 189.3': fractures, 55
degree dips, partially open, Calcite
mineralization
185.7 - 186': seven intersecting fractures,
ranging from 60-80 degree dips, closed,
Calcite mineralization
186.7': fracture, 55 degree dip, closed, Calcite
mineralization
187.2': fracture, 10 degree dip, closed, Calcite
mineralization
187.7': fracture, 60 degree dip, closed, Calcite
mineralization
two intersecting fractures at 189.6' and 189.
10 and 50 degree dips, partially open, Calcite
mineralization
WELL
.• �
.. � �.

Duke Energy Carolinas, LLC � Dan River -CSA Groundwater Assessment ���
Appendix A, Sample Photographs
Photo 1 — MW-317BRL: Box 1 of 13 - Depth: 36.0' — 39.6' -Date: 06/23/16
Photo 2 — MW-317BRL: Box 2 of 13 - Depth: 39.6' — 51.0' -Date: 06/27/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC � Dan River -CSA Groundwater Assessment
Appendix A, Sample Photographs
Photo 3 — MW-317BRL: Box 3 of 13 - Depth: 51.0' — 61.2' -Date: 06/27/16
r�
Photo 4 — MW-317BRL: Box 4 of 13 - Depth: 61.2' — 71.9' -Date: 06/27/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC � Dan River -CSA Groundwater Assessment ���
Appendix A, Sample Photographs
Photo 5 — MW-317BRL: Box 5 of 13 - Depth: 71.9' — 83.8' -Date: 06/27/16
�n 74rer-T�}„ Gap
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Doth 83,8 - q�'
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�G/�: �y� — 89.8
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Photo 6 — MW-317BRL: Box 6 of 13 - Depth: 83.8' — 94.8'
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
-Date: 06/27/16

Duke Energy Carolinas, LLC � Dan River -CSA Groundwater Assessment ���
Appendix A, Sample Photographs
Photo 7 — MW-317BRL: Box 7 of 13 - Depth: 94.8' — 109.8' - Date: 06/28/16
Photo 8 — MW-3176RL: Box 8 of 13 - Depth: 109.8' — 123.9' - Date: 06/28/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Y ,3,"
�n� �✓.
X�-
�,(�nF1�nq
Duke Energy Carolinas, LLC � Dan River -CSA Groundwater Assessment
Appendix A, Sample Photographs
`i'
Photo 9 — MW-317BRL: Box 9 of 13 - Depth: 123.9' — 136.8' - Date: 06/29/16
Photo 10 — MW-317BRL: Box 10 of 13 - Depth: 136.8' — 149.8' - Date: 06/29/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC � Dan River -CSA Groundwater Assessment ���
Appendix A, Sample Photographs
Photo 11 — MW-317BRL: Box 11 of 13 - Depth: 149.8' — 164.0' - Date: 07/7/16
Photo 12 — MW-317BRL: Box 12 of 13 - Depth: 164.0' — 177.5' - Date: 07/7/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC � Dan River -CSA Groundwater Assessment ���
Appendix A, Sample Photographs
Photo 13 — MW-317BRL: Box 13 of 13 - Depth: 177.5' — 189.8' - Date: 07/8/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]