NC0004978_FINAL_Marshall_CSA_Tables_2018_20180129

2018 Comprehensive Site Assessment Update January 2018
Marshall Steam Station
TABLES
SynTerra

TABLE 2-1
WELL CONSTRUCTION DATA
MARSHALL STEAM STATION
DUKE ENERGY CAROLINAS, LLC, TERRELL, NC
IDENTIFICATION
PROGRAM
DATE INSTALLED
MONITORING ZONE
Flow Layer
MATERIAL
DIAMETER (INCHES)
NORTHING (FEET)
EASTING (FEET)
MEASURING POINT TOC
ELEVATION (Feet-MSL)
Casing Stick Up (k)
GROUND SURFACE
ELEVATION (FEET- MSL)
TOTAL WELL DEPTH'''
(FEET BGS)
MEASURED WELL
DEPTH' (FEET TOC)
SCREEN UPPER
(BGS)
SCREEN LOWER
(BGS)
SCREENED
INTERVAL'
(FEET INTERVAL'
SCREEN LENGTH
(FT)
TOP OF SCREEN
ELEVATION (FEET-
MSL)
BOTTOM OF SCREEN
ELEVATION (FEET- MSL)
MIDDLE OF SCREEN
ELEVATION
AB-10D
CAMA
6/27/2015
Deep
Transition
PVC
6.0
683743.73
1415472.14
802.68
3.10
799.58
84.20
87.30
71.00
76.00
74.10
79.10
5
728.58
723.58
726.08
AB-l0BR
CAMA
8/25/2016
Bedrock
Bedrock
PVC
2.0
683738.00
1415482.00
802.539
3.01
799.532
134.00
137.01
120.00
125.00
123.01
128.01
5
679.53
674.53
677.03
AB-30S
CAMA
3/31/2015
Shallow
Ash
PVC
2.0
683755.48
1415452.07
802.41
2.87
799.54
27.87
30.74
9.00
24.00
11.87
26.87
15
790.54
775.54
783.04
AB-10SL
CAMA
3/31/2015
Shallow
Ash
PVC
2.0
683751.65
1415457.75
802.52
3.00
799.52
56.00
59.00
40.00
50.00
43.00
53.00
30
759.52
749.52
754.52
AB-11D
CAMA
6/30/2015
Deep
Transition
PVC
5.0
685049.51
1416180.09
799.95
3.11
796.84
88.11
91.22
77.00
82.00
80.11
85.11
5
719.84
714.84
717.34
AB-11S
CAMA
6/23/2015
Shallow
Saprolite
PVC
2.0
685056.24
1416188.51
800.05
3.16
796.89
19.16
22.32
6.00
16.00
9.16
19.16
30
790.89
780.89
785.89
AB-12BR
CAMA
9/1/2016
Bedrock
Bedrock
PVC
2.0
683502.00
1414695.00
795.428
2.84
792.589
114.60
114.60
100.50
105.50
103.34
108.34
5
692.09
687.09
689.59
AB-12D
CAMA
4/30/2015
Deep
Transition
PVC
5.0
683503.70
1414672.93
795.45
2.89
792.56
73.69
76.58
62.00
67.00
64.89
69.89
5
730.56
725.56
728.06
AB-12S
CAMA
3/26/2015
Shallow
Ash
PVC
2.0
683503.35
1414678.32
795.61
2.91
792.70
15.91
18.82
3.00
13.00
5.91
15.91
30
789.70
779.70
784.70
AB-12SL
CAMA
3/26/2015
Shallow
Ash
PVC
2.0
683502.36
1414682.08
795.67
2.97
792.70
54.97
57.94
40.00
50.00
42.97
52.97
30
752.70
742.70
747.70
AB-13D
CAMA
6/19/2015
Deep
Transition
PVC
6.0
684196.73
1413520.32
824.55
2.96
821.59
95.96
98.92
81.00
86.00
83.96
88.96
5
740.59
735.59
738.09
AB-13S
CAMA
4/8/2015
Shallow
Ash
PVC
2.0
684180.48
1413524.42
823.73
2.52
821.21
33.52
36.04
14.80
29.80
17.32
32.32
15
806.41
791.41
798.91
AB-14D
CAMA
6/8/2015
Deep
Transition
PVC
5.0
683676.24
1412767.69
824.11
2.66
821.45
93.76
96.42
80.00
85.00
82.66
87.66
5
741.45
736.45
738.95
AB-14S
CAMA
6/4/2015
Shallow
Ash
PVC
2.0
683679.54
1412755.12
824.71
2.98
821.73
23.68
26.66
5.70
20.70
8.68
23.68
15
816.03
801.03
808.53
AB-15BR
CAMA
6/16/2015
Bedrock
Bedrock
PVC
6.0
684803.85
1413514.37
823.01
2.97
820.04
118.77
121.74
107.00
112.00
109.97
114.97
5
713.04
708.04
710.54
AB-15D
CAMA
6/1/2315
Deep
Transition
PVC
6.0
684822.45
1413524.15
823.04
2.78
820.26
77.78
80.56
64.00
69.00
66.78
71.78
5
756.26
751.26
753.76
AB-15S
CAMA
4/4/2015
Shallow
Ash
PVC
2.0
684814.88
1413521.39
823.27
3.13
820.14
23.13
26.26
5.00
20.00
8.13
23.13
15
815.14
800.14
807.64
AB-15SL
CAMA
4/3/2015
Shallow
Ash
PVC
2.0
684808.89
1413518.56
823.17
3.15
820.02
57.15
60.30
40.00
50.00
43.15
53.15
10
780.02
770.02
775.02
AB-16D
CAMA
7/13/2015
Deep
Transition
PVC
6.0
685497.55
1413778.99
822.45
2.95
819.50
50.05
53.00
41.00
46.00
43.95
48.95
5
778.50
773.50
776.00
AB-16S
CAMA
5/13/2015
Shallow
Saprolite
PVC
2.0
685490.38
1413794.53
822.08
3.06
819.02
16.66
19.72
3.20
13.20
6.26
16.26
30
815.82
805.82
810.82
AB-17D
CAMA
6/16/2015
Deep
Transition
PVC
6.0
686446.33
1413066.01
833.56
2.98
830.58
123.98
126.96
106.00
111.00
108.98
113.98
5
724.58
719.58
722.08
AB-17S
CAMA
4/6/2015
Shallow
Ash
PVC
2.0
686446.68
1413054.46
833.29
3.00
830.29
25.01
28.01
6.00
21.00
9.00
24.00
15
824.29
809.29
816.79
AB-18D
CAMA
7/2/2015
Deep
Transition
PVC
6.0
685663.31
1412917.88
825.20
2.96
822.24
83.46
86.42
72.00
77.00
74.96
79.96
5
750.24
745.24
747.74
AB-185
CAMA
4/7/2015
Shallow
Ash
PVC
2.0
685664.48
1412929.98
825.40
3.14
822.26
16.64
1918
3.00
13.00
6.14
16.14
10
819.26
809.26
814.26
AB-1BRL
CAMA
9/28/2017
Bedrock
Bedrock
PVC
2.0
681543.59
1417690.50
774.78
0.02
774.77
166.00
166.02
161.00
166.00
161.01
166.01
5
613.77
608.77
611.27
AB-1BR
CAMA
7/8/2015
Bedrock
Bedrock
PVC
6.0
681572.86
1417706.31
777.21A
2.38
774.83
134.38
136.76
119.00
124.00
121.38
126.38
5
655.83
650.83
653.33
AB-11)
CAMA
7/8/2015
Deep
Transition
PVC
6.0
681567.96
1417702.65
777.09A
2.40
774.93
99.90
102.30
91.00
96.00
93.40
98.40
5
683.69
678.69
681.19
AB -IS
CAMA
7/1/2015
Shallow
Saprolite
PVC
2.0
681562.00
1417700.48
777.27A
2.71
774.75
23.71
26.42
5.50
20.00
8.21
23.21
15
769.06
754.06
761.56
AB-20D
CAMA
6/26/2015
Deep
Transition
PVC
6.0
684634.94
1411519.25
892.35
3.01
889.34
147.31
150.32
139.20
144.20
142.21
147.21
5
750.14
745.14
747.64
AB-20S
CAMA
5/1/2015
Shallow
Ash
PVC
2.0
684640.86
1411523.77
892.43
3.14
889.29
72.39
75.53
53.50
68.50
56.64
71.64
15
835.79
820.79
828.29
AB-21D
CAMA
4/7/2015
Deep
Transition
PVC
5.0
681948.98
1414935.24
810.23
2.62
807.61
83.54
86.16
60.00
65.00
62.62
67.62
5
747.61
742.61
745.11
AB-21S
CAMA
3/24/2015
Shallow
Ash
PVC
2.0
681953.18
1414925.09
810.66
2.71
807.95
30.71
33.42
13.00
28.00
15.71
30.71
15
794.95
779.95
787.45
AB-2D
CAMA
7/8/2015
Deep
Transition
PVC
6.0
680479.38
1417087.65
781.44
2.96
778.48
104.06
107.02
91.00
96.00
93.96
98.96
5
687.48
682.48
684.98
AB-2S
CAMA
7/2/2015
Shallow
Saprolite
PVC
2.0
680484.01
1417091.23
781.30
2.72
778.58
34.72
37.44
17.00
32.00
19.72
34.72
15
761.58
746.58
754.08
AB-31)
CAMA
5/26/2015
Deep
Transition
PVC
5.0
680532.62
1415467.17
815.03
2.89
812.14
143.89
146.79
130.00
135.00
132.90
137.90
5
682.14
677.14
679.64
AB-3S
CAMA
3/23/2015
Shallow
Ash
PVC
2.0
680539.34
1415469.71
815.08
3.08
812.00
26.58
29.66
8.00
23.50
11.08
26.08
15
804.00
789.00
796.50
AB-41)
CAMA
4/14/2015
Deep
Transition
PVC
5.0
681015.22
1415006.25
810.01
2.84
807.17
87.44
90.28
72.00
77.00
74.34
79.34
5
735.67
730.67
733.17
AB-4S
CAMA
3/20/2015
Shallow
Ash
PVC
2.0
681009.41
1415022.53
809.73
2.30
807.43
26.80
29.10
6.00
21.00
8.30
23.30
15
801.43
786.43
793.93
AB-4SL
CAMA
3/20/2015
Shallow
Ash
PVC
2.0
681011.27
1415014.27
809.85
2.51
807.34
57.51
60.02
38.50
48.50
41.01
51.01
30
768.84
758.84
763.84
AB-SBR
CAMA
6/20/2015
Bedrock
Bedrock
PVC
6.0
680719.35
1414280.82
807.55
3.10
804.45
125.60
128.70
105.00
110.00
108.10
113.10
5
699.45
694.45
696.95
AB-51)
CAMA
6/3/2015
Deep
Transition
PVC
6.0
680714.03
1414278.89
807.52
3.05
804.47
88.05
91.10
78.00
83.00
81.05
86.05
5
726.47
721.47
723.97
AB-5S
CAMA
3/24/2015
Shallow
Ash
PVC
2.0
680708.77
1414277.38
807.50
2.94
804.56
21.44
24.38
3.20
18.20
6.14
21.14
15
801.36
786.36
793.86
AB-6BRL
CAMA
9/29/2017
Bedrock
Bedrock
PVC
2.0
682285.34
1412826.39
836.76
2.61
834.14
160.00
--
155.00
160.00
157.61
162.61
5
679.14
674.14
676.64
AB-6BR
CAMA
6/23/2015
Bedrock
Bedrock
PVC
6.0
682246.45
1412848.99
835.77
2.93
832.84
121.93
124.86
105.00
110.00
107.93
112.93
5
727.84
722.84
725.34
AB-6BRA
--
--
Bedrock
Bedrock
--
--
682267.38
1412842.78
--
2.93
--
--
--
--
--
--
--
--
--
--
--
AB-61)
CAMA
4/22/2015
Deep
Transition
PVC
5.0
682239.65
1412851.32
835.36
2.46
832.90
78.26
80.72
62.50
67.50
64.96
69.96
5
770.40
765.40
767.90
AB-6S
CAMA
4/22/2015
Shallow
Ash
PVC
2.0
682232.33
1412854.25
835.38
2.61
832.77
24.61
27.22
7.00
22.00
9.61
24.61
15
825.77
810.77
818.27
AB-71)
CAMA
5/15/2015
Deep
Transition
PVC
5.0
682818.72
1413214.92
834.13
2.92
831.21
95.92
98.84
79.00
84.00
81.92
86.92
5
752.21
747.21
749.71
AB-7S
CAMA
3/25/2015
Shallow
Ash
PVC
2.0
682815.06
1413224.11
834.29
2.86
831.43
23.86
26.72
5.00
20.00
7.86
22.86
15
826.43
811.43
818.93
AB-81)
CAMA
5/8/2015
Deep
Transition
PVC
5.0
682836.10
1414032.89
800.50
3.00
797.50
104.30
107.30
95.00
100.00
98.00
103.00
5
702.50
697.50
700.00
AB-8S
CAMA
4/8/2015
Shallow
Ash
PVC
2.0
682831.71
1414030.28
800.33
2.91
797.42
17.94
20.85
3.00
13.00
5.91
15.91
10
794.42
784.42
789.42
AB-9BR
CAMA
7/10/2015
Bedrock
Bedrock
PVC
4.0
683043.55
1415269.85
797.64
2.70
794.94
112.80
115.50
78.00
83.00
80.70
85.70
5
716.94
711.94
714.44
AB-91)
CAMA
4/28/2015
Deep
Transition
PVC
5.0
683050.64
1415263.19
797.26
2.50
794.76
63.00
65.50
48.00
53.00
50.50
55.50
5
746.76
741.76
744.26
AB-9S
CAMA
4/27/2015
Shallow
Saprolite
PVC
2.0
683044.02
1415261.07
797.78
2.40
795.38
15.40
17.80
3.00
10.00
5.40
15.40
30
792.38
782.38
787.38
AL-1BR
CAMA
8/30/2016
Bedrock
Bedrock
PVC
2.0
683136.00
1417013.00
818.067
3.04
815.023
132.00
--
122.00
127.00
125.04
130.04
5
693.02
688.02
690.52
AL-11)
CAMA
4/30/2015
Deep
Transition
PVC
5.0
683144.37
1417007.50
817.94
2.89
815.05
92.29
95.18
79.60
84.60
82.49
87.49
5
735.45
730.45
732.95
AL-1S
CAMA
4/2/2015
Shallow
Saprolite
PVC
2.0
683157.68
1417002.90
817.97
3.04
814.93
50.34
53.38
31.50
46.50
34.54
49.54
15
783.43
768.43
775.93
AL-2BRLL
CAMA
9/25/2017
Bedrock
Bedrock
PVC
2.0
684602.98
1414853.87
914.63
2.86
911.77
345.00
--
340.00
345.00
342.86
347.86
5
571.77
566.77
569.27
AL-2BRL
--
--
--
--
--
--
--
--
915.389
2.72
912.666
--
--
--
--
257.30
262.30
5
658.09
653.09
655.59
AL-2BR
CAMA
7/8/2015
Bedrock
Bedrock
PVC
6.0
684615.63
1414830.04
915.10
2.32
912.78
230.82
233.14
203.60
208.60
205.92
210.92
5
709.18
704.18
706.68
AL-21)
CAMA
5/27/2015
Deep
Transition
PVC
6.0
684620.72
1414826.75
915.33
2.50
912.83
164.50
167.00
152.00
157.00
154.50
159.50
5
760.83
755.83
758.33
AL-2S
CAMA
4/28/2015
Shallow
Saprolite
PVC
2.0
684610.22
1414833.97
915.41
2.88
912.53
130.18
133.06
111.70
126.70
114.58
129.58
15
800.83
785.83
793.33
AL-3BR
CAMA
8/30/2016
Bedrock
Bedrock
PVC
2.0
685509.00
1415050.00
919.02
2.99
916.03
239.30
--
228.50
233.50
231.49
236.49
5
687.53
682.53
685.03
AL-3D
CAMA
5/29/2015
Deep
Transition
PVC
6.0
685495.15
1415062.57
918.69
2.70
915.99
189.70
192.40
178.50
1 183.50
181.20
186.20
5
737.49
732.49
734.99
P:\Duke Energy Carolinas\18. MARSHALL\CSA Update January 2018\Final\Tables\Table 2-1 Well Construction Page 1 of 3

TABLE 2-1
WELL CONSTRUCTION DATA
MARSHALL STEAM STATION
DUKE ENERGY CAROLINAS, LLC, TERRELL, NC
IDENTIFICATION
PROGRAM
DATE INSTALLED
MONITORING ZONE
Flow Layer
MATERIAL
DIAMETER (INCHES)
NORTHING (FEET)
EASTING (FEET)
MEASURING POINT TOC
ELEVATION (Feet-MSL)
Casing Stick Up (k)
GROUND SURFACE
ELEVATION (FEET- MSL)
TOTAL WELL DEPTH'''
(FEET BGS)
MEASURED WELL
DEPTH' (FEET TOC)
SCREEN UPPER
(BGS)
SCREEN LOWER
(BGS)
SCREENED
INTERVAL'
(FEET INTERVAL'
SCREEN LENGTH
(FT)
TOP OF SCREEN
ELEVATION (FEET-
MSL)
BOTTOM OF SCREEN
ELEVATION (FEET- MSL)
MIDDLE OF SCREEN
ELEVATION
AL-35
CAMA
4/28/201S
Shallow
Ash
PVC
2.0
685501.12
1415062.23
918.59
2.82
915.77
120.42
123.24
96.80
117.60
99.62
120.42
21
818.97
798.17
808.57
AL-4BR
CAMA
8/30/2016
Bedrock
Bedrock
PVC
2.0
685140.00
1414559.00
918.715
2.97
915.747
211.00
-
179.00
184.00
181.97
186.97
5
736.75
731.75
734.25
AL-4BRL
CAMA
9/27/2017
Bedrock
Bedrock
PVC
2.0
685158.92
1414585.85
918.74
2.90
915.85
260.00
-
250.00
260.00
252.90
262.90
10
665.85
655.85
660.85
AL-41)
CAMA
6/28/2015
Deep
Transition
PVC
6.0
685149.26
1414565.27
918.44
2.43
916.01
159.83
162.26
148.40
153.40
150.83
155.83
5
767.61
762.61
765.11
BG-1BR
CAMA
4/18/2015
Bedrock
Bedrock
PVC
6.0
687812.80
1419851.83
817.94
3.09
814.85
94.09
97.18
84.00
89.00
87.09
92.09
5
730.85
725.85
728.35
BG-1BRA
--
Bedrock
Bedrock
--
-
687823.58
1419843.84
--
3.01
-
-
--
-
--
--
--
--
-
--
BG-SD
CAMA
6/24/2015
Deep
Transition
PVC
6.0
687818.48
1419859.84
817.63
2.88
814.75
45.28
48.16
35.00
40.00
37.88
42.88
5
779.75
774.75
777.25
BG-IS
CAMA
6/3/2015
Shallow
Saprolite
PVC
2.0
687816.43
1419863.84
817.35
2.56
814.79
20.06
22.62
5.20
15.20
10.06
20.06
10
807.29
797.29
802.29
BG-2BR
CAMA
6/23/2015
Bedrock
Bedrock
PVC
6.0
686181.35
1418418.84
814.81
2.82
811.99
63.45
66.27
50.00
55.00
52.82
57.82
5
761.99
756.99
759.49
BG-2S
CAMA
6/18/2015
Shallow
Saprolite
PVC
2.0
686177.84
1418417.96
814.33
2.51
811.82
19.53
22.04
5.80
15.80
9.51
19.51
10
804.82
794.82
799.82
BG-3BR
CAMA
4/5/2015
Bedrock
Bedrock
PVC
6.0
686843.40
1418979.67
867.69
2.97
864.72
113.97
116.93
105.00
110.00
107.97
112.97
5
759.72
754.72
757.22
BG-3D
CAMA
6/25/2015
Deep
Bedrock
PVC
6.0
686842.13
1419003.32
864.18
2.62
861.56
73.03
75.65
59.00
64.00
61.62
66.62
5
802.56
797.56
800.06
BG-3S
CAMA
5/4/2015
Shallow
Saprolite
PVC
2.0
686842.99
1419015.34
863.03
2.28
860.75
42.09
44.37
22.20
32.20
24.48
34.48
10
838.55
828.55
833.55
CCR-10D
CCR
5/10/2016
Deep
Transition
PVC
2.0
682235.68
1417522.04
796.01
3.35
792.66
73.43
76.78
65.08
70.08
68.43
73.43
5
727.58
722.58
725.08
CCR-10S
CCR
4/28/2016
Shallow
Saprolite
PVC
2.0
682238.94
1417517.24
796.46
3.55
792.91
22.76
26.31
4.21
19.21
7.76
22.76
15
788.70
773.70
781.20
CCR-11D
CCR
4/22/2016
Deep
Transition
PVC
2.0
682078.97
1417292.17
793.86
2.59
791.27
79.87
82.46
72.28
77.28
74.87
79.87
5
718.99
713.99
716.49
CCR-11S
CCR
4/21/2016
Shallow
Saprolite
PVC
2.0
682082.49
1417288.44
794.24
2.68
791.56
22.81
25.49
5.13
20.13
7.81
22.81
15
786.43
771.43
778.93
CCR-12D
CCR
4/27/2016
Deep
Transition
PVC
2.0
682446.12
1416714.27
793.84
2.75
791.09
89.66
92.41
81.91
86.91
84.66
89.66
5
709.18
704.18
706.68
CCR-12S
CCR
4/26/2016
Shallow
Saprolite
PVC
2.0
682451.33
1416717.77
793.85
2.63
791.22
23.40
26.03
5.77
20.77
8.40
23.40
15
785.45
770.45
777.95
CCR-13D
CCR
4/27/2016
Deep
Transition
PVC
2.0
682838.47
1416772.08
800.02
2.81
797.21
84.87
87.68
77.06
82.06
79.87
84.87
5
720.15
715.15
717.65
CCR-13S
CCR
4/27/2016
Shallow
Saprolite
PVC
2.0
682830.07
1416766.19
799.68
2.93
796.75
74.11
77.04
56.18
71.18
59.11
74.11
15
740.57
725.57
733.07
CCR-14D
CCR
5/10/2016
Deep
Transition
PVC
2.0
683281.01
1416626.84
796.11
2.88
793.23
64.59
67.47
56.71
61.71
59.59
64.59
5
736.52
731.52
734.02
CCR-14S
CCR
5/4/2016
Shallow
Saprolite
PVC
2.0
683291.34
1416624.08
795.97
2.54
793.43
22.22
24.76
4.68
19.68
7.22
22.22
15
788.75
773.75
781.25
CCR-15D
CCR
4/22/2016
Deep
Transition
PVC
2.0
683867.76
1415819.89
805.14
2.72
802.42
61.23
63.95
53.51
58.51
56.23
61.23
5
748.91
743.91
746.41
CCR-1SS
CCR
4/15/2016
Shallow
Saprolite
PVC
2.0
683863.39
1415815.68
804.76
2.52
802.24
21.51
24.03
3.99
18.99
6.51
21.51
15
798.25
783.25
790.75
CCR-16D
CCR
4/25/2016
Deep
Transition
PVC
2.0
684323.00
1416034.21
819.37
2.95
816.42
51.45
54.40
43.50
48.50
46.45
51.45
5
772.92
767.92
770.42
CCR-16S
CCR
4/16/2016
Shallow
Saprolite
PVC
2.0
684327.66
1416038.12
819.32
3.17
816.15
23.70
26.87
5.53
20.53
8.70
23.70
15
810.62
795.62
803.12
CCR-1D
CCR
4/21/2016
Deep
Transition
PVC
2.0
679956.53
1415048.41
809.32
1.90
807.42
90.89
92.79
83.99
88.99
85.89
90.89
5
723.43
718.43
720.93
CCR-IS
CCR
4/13/2016
Shallow
Saprolite
PVC
2.0
679962.30
1415053.47
810.31
2.97
807.34
37.91
40.88
19.94
34.94
22.91
37.91
15
787.40
772.40
779.90
CCR-2D
CCR
4/20/2016
Deep
Transition
PVC
2.0
680115.92
1415484.79
806.89
2.77
804.12
81.96
84.73
74.19
79.19
76.96
81.96
5
729.93
724.93
727.43
CCR-2S
CCR
4/14/2016
Shallow
Saprolite
PVC
2.0
680118.48
1415490.52
806.56
2.32
804.24
34.75
37.07
17.43
32.43
19.75
34.75
15
786.81
771.81
779.31
CCR-3D
CCR
5/12/2016
Deep
Transition
PVC
2.0
679259.37
1416472.78
780.44
3.34
777.10
101.36
104.70
93.02
98.02
96.36
101.36
5
684.08
679.08
681.58
CCR-3S
CCR
5/10/2016
Shallow
Saprolite
PVC
2.0
679264.24
1416475.78
780.28
2.89
777.39
36.23
39.12
18.34
33.34
21.23
36.23
15
759.05
744.05
751.55
CCR-4D
CCR
5/3/2016
Deep
Transition
PVC
2.0
679823.07
1416864.75
783.82
2.88
780.94
105.25
108.13
97.37
102.37
100.25
105.25
5
683.57
678.57
681.07
CCR-4S
CCR
4/20/2016
Shallow
Saprolite
PVC
2.0
679816.52
1416860.48
783.66
2.81
780.85
35.24
38.05
17.43
32.43
20.24
35.24
15
763.42
748.42
755.92
CCR-SD
CCR
5/5/2016
Deep
Transition
PVC
2.0
680244.25
1417133.74
776.97
2.73
774.24
85.14
87.87
77.41
82.41
80.14
85.14
5
696.83
691.83
694.33
CCR-SS
CCR
4/19/2016
Shallow
Saprolite
PVC
2.0
680250.77
1417138.33
777.25
3.02
774.23
33.34
36.36
15.32
30.32
18.34
33.34
15
758.91
743.91
751.41
CCR-9D
CCR
5/13/2016
Deep
Transition
PVC
2.0
681884.33
1417909.29
799.80
2.96
796.84
100.46
103.42
92.50
97.50
95.46
100.46
5
704.34
699.34
701.84
CCR-9DA
CCR
2/14/2017
Deep
Transition
PVC
2.0
681903.07
1417913.56
799.77
12.93
796.84
120.25
123.18
111.17
1116.17
114.10
119.10
5
1685.67
680.67
683.17
CCR-9S
CCR
4/29/2016
Shallow
Saprolite
PVC
2.0
681882.90
1417903.10
799.88
2.97
796.91
45.20
48.17
27.23
42.23
30.20
45.20
15
769.68
754.68
762.18
GWA-IOD
CAMA
3/24/2016
Deep
Transition
PVC
6.0
683550.78
1417401.67
778.10
2.83
775.27
122.84
125.67
113.50
118.00
116.34
120.84
5
661.77
657.27
659.52
GWA-IOS
CAMA
4/6/2016
Shallow
Saprolite
PVC
2.0
683558.12
1417398.84
777.65
2.34
775.32
23.34
25.67
5.00
20.00
7.34
22.34
15
770.32
755.32
762.82
GWA-11BR
CAMA
3/8/2017
Bedrock
Bedrock
PVC
2.0
682799.86
1417430.69
810.026
3.02
807.00
155.00
158.02
150.00
155.00
153.02
158.02
5
657.00
652.00
654.50
GWA-11D
CAMA
3/9/2016
Deep
Transition
PVC
6.0
682800.44
1417422.52
811.24
3.00
808.24
129.00
131.99
110.00
115.00
112.80
117.80
5
698.44
693.44
695.94
GWA-11S
CAMA
3/11/2016
Shallow
Saprolite
PVC
2.0
682793.57
1417401.58
812.55
2.96
809.59
78.96
81.92
40.00
55.00
42.76
57.76
115
769.79
754.79
762.29
GWA-12BR
CAMA
5/24/2016
Bedrock
Bedrock
PVC
6.0
682081.55
1410362.43
875.65
-0.37
876.02
147.63
147.27
113.00
118.00
112.63
117.63
5
763.02
758.02
760.52
GWA-12D
CAMA
5/13/2016
Deep
Transition
PVC
6.0
682092.53
1410359.68
875.83
-0.46
876.29
108.54
108.08
88.00
93.00
87.54
92.54
5
788.29
783.29
785.79
GWA-12S
CAMA
5/24/2016
Shallow
Saprolite
PVC
2.0
682077.92
1410362.36
887.87
-0.14
888.01
25.06
24.92
10.00
25.00
9.46
24.46
15
878.41
863.41
870.91
GWA-13D
CAMA
5/3/2016
Deep
Transition
PVC
6.0
683383.12
1410266.56
888.281
0.14
888.143
198.82
198.96
133.50
138.50
133.32
138.32
5
754.96
749.96
752.46
GWA-13DA
--
--
Transition Zone
Deep
--
-
683383.24
1410260.62
--
0.14
--
--
--
--
--
-
--
--
--
--
--
GWA-13S
CAMA
5/25/2016
Shallow
Saprolite
PVC
2.0
683379.30
1410275.40
887.87
-0.14
888.01
31.06
30.92
14.50
29.50
14.36
29.36
15
873.51
858.51
866.01
GWA-14D
CAMA
3/13/2017
Deep
Transition
PVC
2.0
685969.66
1410111.63
911.405
-0.08
911.481
110.00
109.92
104.50
109.50
104.42
109.42
5
1806.98
801.98
804.48
GWA-14S
CAMA
3/13/2017
Shallow
Saprolite
PVC
2.0
685968.00
1410101.56
910.688
-0.55
911.236
50.00
-
35.00
50.00
34.45
49.45
15
876.24
861.24
868.74
GWA-15S
CAMA
3/10/2017
Shallow
Saprolite
PVC
2.0
682858.33
1417583.58
781.387
2.86
778.525
37.00
-
20.80
35.80
23.66
38.66
15
757.73
742.73
750.23
GWA-1BR
CAMA
7/6/2015
Bedrock
Bedrock
PVC
6.0
679326.85
1416338.18
806.10
2.95
803.15
159.95
162.90
151.50
156.40
154.45
159.45
5
651.65
646.65
649.15
GWA-11)
CAMA
7/2/2015
Deep
Transition
PVC
6.0
679331.07
1416339.79
806.05
2.78
803.27
127.28
130.06
119.00
124.00
121.78
126.78
5
684.27
679.27
681.77
GWA-1S
CAMA
6/29/2015
Shallow
Saprolite
PVC
2.0
679336.11
1416341.98
805.97
2.81
803.16
55.81
58.62
38.00
53.00
40.81
55.81
15
765.16
750.16
757.66
GWA-2DA
CAMA
3/9/2017
Deep
Transition
PVC
2.0
679263.20
1414083.88
826.59
2.80
823.7935
99.00
--
94.00
99.00
96.80
101.80
5
729.79
724.79
727.29
GWA-21)
CAMA
6/2/2015
Deep
Transition
PVC
5.0
679252.88
1414089.34
826.69
2.93
823.76
103.93
106.86
78.00
83.00
80.93
85.93
5
745.76
740.76
743.26
GWA-2S
CAMA
5/14/2015
Shallow
Saprolite
PVC
2.0
679246.18
1414091.25
826.97
3.06
823.91
50.06
53.12
13.50
29.50
13.50
32.56
19
813.47
794.41
803.94
GWA-31)
CAMA
7/15/2015
Deep
Transition
PVC
5.0
685962.19
1411086.36
839.44
2.96
836.48
54.16
57.12
36.00
41.00
38.96
43.96
5
800.48
795.48
797.98
GWA-3S
CAMA
7/13/2015
Shallow
Soil
PVC
2.0
685961.42
1411080.72
839.24
2.82
836.42
18.02
20.84
3.00
13.00
5.82
15.82
10
833.42
823.42
828.42
GWA-4D
CAMA/CCR
6/12/2015
Deep
Transition
PVC
5.0
686783.39
1411776.91
902.45
3.07
899.38
90.07
93.14
81.00
86.00
84.07
89.07
5
818.38
813.38
815.88
GWA-4S
CAMA/CCR
5/19/2015
Shallow
Saprolite
PVC
2.0
686776.57
1411777.34
901.97
2.99
898.98
67.99
70.98
49.20
64.20
52.19
67.19
15
849.78
834.78
842.28
GWA-SD
CAMA/CCR
7/8/2015
Deep
Transition
PVC
5.0
686811.16
1415693.60
847.17
2.81
844.36
52.31
55.12
43.50
48.50
46.31
51.31
5
800.86
795.86
798.36
P:\Duke Energy Carolinas\18. MARSHALL\CSA Update January 2018\Final\Tables\Table 2-1 Well Construction Page 2 of 3

TABLE 2-1
WELL CONSTRUCTION DATA
MARSHALL STEAM STATION
DUKE ENERGY CAROLINAS, LLC, TERRELL, NC
IDENTIFICATION
PROGRAM
DATE INSTALLED
MONITORING ZONE
Flow layer
MATERIAL
DIAMETER (INCHES)
NORTHING (FEET)
EASTING (FEET)
MEASURING POINT TOC
ELEVATION (Feet-MSL)
Casing Stick Up (ft)
GROUND SURFACE
ELEVATION (FEET- MSL)
TOTAL WELL DEPTH'''
(FEET BGS)
MEASURED WELL
DEPTH' (FEET TOC)
SCREEN UPPER
(BGS)
SCREEN LOWER
(BGS)
SCREENED
INTERVAL'
(FEET INTERVAL'
SCREEN LENGTH
(FT)
TOP OF SCREEN
ELEVATION (FEET-
MSL)
BOTTOM OF SCREEN
ELEVATION (FEET- MSL)
MIDDLE OF SCREEN
ELEVATION
GWA-5S
CAMA/CCR
7/2/2015
Shallow
Soil
PVC
2.0
686815.49
1415696.44
847.22
2.92
844.30
37.42
40.34
24.50
34.50
27.42
37.42
10
819.80
809.80
814.80
GWA-6D
CAMA
7/7/2015
Bedrock
Bedrock
PVC
6.0
686115.40
1416996.20
845.72
2.40
843.32
117.91
120.31
102.00
107.00
104.40
109.40
5
741.32
736.32
738.82
GWA-6S
CAMA
6/22/2015
Shallow
Saprolite
PVC
2.0
686100.74
1416987.88
845.37
2.38
842.99
52.88
55.26
37.70
47.70
40.08
50.08
10
805.29
795.29
800.29
GWA-7D
CAMA
6/17/2015
Deep
Transition
PVC
6.0
684227.62
1416711.93
812.50
2.95
809.55
37.99
40.94
25.50
30.50
28.45
33.45
5
784.05
779.05
781.55
GWA-7S
CAMA
5/21/2017
Shallow
Saprolite
PVC
2.0
684231.64
1416725.60
810.72
2.92
807.80
21.92
24.84
9.00
19.00
11.92
21.92
10
798.80
788.80
793.80
GWA-8D
CAMA
7/12/2015
Bedrock
Bedrock
PVC
5.0
687478.91
1415906.06
853.68
3.09
850.59
64.29
67.38
56.00
61.00
59.09
64.09
5
794.59
789.59
792.09
GWA-8S
CAMA
7/12/2015
Shallow
Saprolite
PVC
2.0
687474.71
1415902.00
852.90
3.15
849.75
41.15
44.30
23.00
38.00
26.15
41.15
15
826.75
811.75
819.25
GWA-9BR
CAMA
7/1/2015
Bedrock
Bedrock
PVC
6.0
685030.13
1410459.13
848.45
2.92
845.53
110.00
112.92
84.00
89.00
86.92
91.92
5
761.53
756.53
759.03
M-23
Piezometer
5/14/2008
Deep
Transition
PVC
1.0
--
--
840.24
2.51
837.73
22.00
24.51
12.00
22.00
14.51
24.51
10
825.73
815.73
820.73
M-45
Piezometer
5/14/2008
Deep
Transition
PVC
1.0
--
--
848.81
2.59
846.22
34.00
36.59
24.00
34.00
26.59
36.59
10
822.22
812.22
817.22
M-6
Piezometer
11/14/2007
Shallow
Saprolite
PVC
2.0
--
--
839.22
2.86
836.36
30.00
32.86
15.00
30.00
17.86
32.86
is
821.36
806.36
813.86
MS-1
Piezometer
12/3/2002
Shallow
Saprolite
PVC
2.0
680783.30
1413134.40
916.32
2.99
813.33
24.00
26.99
14.00
24.00
16.99
26.99
10
899.33
889.33
894.33
MS-10
Landfill
--
Shallow
Saprolite
PVC
2.0
681027.60
1411623.00
851.29
3.00
848.29
23.34
26.34
13.34
23.34
16.34
26.34
10
834.95
824.95
829.95
MS-11
Landfill
--
Shallow
Saprolite
PVC
2.0
680297.50
1411565.00
859.78
2.91
856.87
42.72
45.63
32.72
42.72
35.63
45.63
10
824.15
814.15
819.15
MS-12
Landfill
--
Shallow
Saprolite
PVC
2.0
679540.10
1412087.00
835.66
2.96
832.70
31.09
34.05
21.09
31.09
24.05
34.05
10
811.61
801.61
806.61
MS-13
Landfill
--
Shallow
Saprolite
PVC
2.0
679732.80
1412501.00
841.90
2.71
839.19
41.52
44.23
31.52
41.52
34.23
44.23
10
807.67
797.67
802.67
MS-14
Landfill
--
Shallow
Saprolite
PVC
2.0
679968.40
1413124.00
844.07
2.80
841.27
44.38
47.18
34.38
44.38
37.18
47.18
10
806.89
796.89
801.89
MS-15
Landfill
--
Shallow
Saprolite
PVC
2.0
680428.00
1412428.00
861.47
3.05
858.42
63.08
66.13
53.08
63.08
56.13
66.13
10
805.34
795.34
800.34
MS-16
Landfill
--
Transition Zone
Deep
PVC
2.0
681142.30
1412485.00
836.98
2.73
834.25
37.46
40.19
27.46
37.46
30.19
40.19
10
806.79
796.79
801.79
MS-2
Piezometer
1/6/2003
Shallow
Saprolite
PVC
2.0
680048.90
1413358.80
823.18
3.01
820.18
29.50
32.51
19.50
29.50
22.51
32.51
30
800.67
790.67
795.67
MS-3
Piezometer
12/3/2002
Shallow
Saprolite
PVC
2.0
679780.70
1413390.60
814.53
3.03
811.50
20.00
23.03
10.00
20.00
13.03
23.03
10
801.50
791.50
796.50
MS-4
Piezometer
1/8/2003
Shallow
Saprolite
PVC
2.0
679168.90
1412970.30
847.68
3.08
844.60
46.00
49.08
36.00
46.00
39.08
49.08
10
808.60
798.60
803.60
MS-5
Piezometer
12/18/2002
Shallow
Saprolite
PVC
2.0
679223.20
1412595.40
842.04
2.94
839.10
38.00
40.94
28.00
38.00
30.94
40.94
10
1811.10
801.10
806.10
MS-6
Piezometer
12/17/2002
Shallow
Saprolite
PVC
2.0
679732.80
1412500.70
841.90
2.71
839.19
38.00
40.71
28.00
38.00
30.71
40.71
10
811.19
801.19
806.19
MS-7
Piezometer
1/3/2003
Shallow
Saprolite
PVC
2.0
680161.50
1412251.30
836.18
3.04
833.14
26.00
29.04
16.00
26.00
19.04
29.04
10
817.14
807.14
812.14
MS-8
Landfill
1/14/2003
Shallow
Saprolite
PVC
2.0
681496.00
1412015.00
872.34
2.99
869.35
51.58
54.57
20.00
30.00
22.99
32.99
30
849.35
839.35
844.35
MS-9
Landfill
1/16/2003
Shallow
Saprolite
PVC
2.0
681384.50
1412181.70
868.04
2.68
865.36
53.00
55.68
40.00
50.00
42.68
52.68
10
825.36
815.36
820.36
MW-1
Landfill
--
Shallow
Saprolite
PVC
2.0
682767.00
1417125.00
823.70
2.50
821.20
78.75
81.25
67.10
77.10
69.60
79.60
10
754.10
744.10
749.10
MW-IOD
NPDES
7/27/2010
Deep
Transition
PVC
2.0
681327.00
1418119.00
772.04
2.04
770.00
87.47
89.51
82.47
87.47
84.51
89.51
5
687.53
682.53
685.03
lVi
NPDES
7/26/2010
Shallow
Saprolite
PVC
2.0
681328.00
1418114.00
772.05
2.31
769.74
29.21
31.52
14.21
29.21
16.52
31.52
15
755.53
740.53
748.03
MW-11D
NPDES
7/29/2010
Deep
Transition
PVC
2.0
682060.00
1411710.00
884.67
2.72
881.95
93.10
95.82
88.10
93.10
90.82
95.82
5
793.85
788.85
791.35
MW-11S
NPDES
7/30/2010
Shallow
Saprolite
PVC
2.0
682062.00
1411706.00
884.99
2.98
882.01
54.12
57.10
39.12
54.12
42.10
57.10
15
842.89
827.89
835.39
MW-12D
NPDES
8/3/2030
Deep
Transition
PVC
2.0
683409.00
1410712.00
871.88
2.87
869.01
98.30
101.17
93.30
98.30
96.17
101.17
5
775.71
770.71
773.21
MW-12S
NPDES
8/3/2030
Shallow
Saprolite
PVC
2.0
683414.00
1410714.00
871.86
2.84
869.02
25.10
27.94
10.10
25.10
12.94
27.94
15
858.92
843.92
851.42
MW-13D
NPDES
8/4/2030
Deep
Transition
PVC
2.0
685017.00
1410464.00
847.05
2.61
844.44
48.55
51.16
43.55
48.55
46.16
51.16
5
800.89
795.89
798.39
MW-13S
NPDES
8/6/2030
Shallow
Saprolite
PVC
2.0
685021.00
1410462.00
847.49
2.59
844.90
20.88
23.47
5.88
20.88
8.47
23.47
1s
839.02
824.02
831.52
MW-14BR
CAMA
--
Bedrock
Bedrock
PVC
5.0
683634.61
1416992.14
810.49
2.84
807.65
107.84
110.68
99.00
104.00
101.84
106.84
5
708.65
703.65
706.15
MW-14D
NPDES
7/28/2010
Deep
Transition
PVC
2.0
683626.00
1416999.00
811.43
2.76
808.67
62.60
65.36
57.60
62.60
60.36
65.36
5
751.07
746.07
748.57
MW-14S
NPDES
7/30/2010
Shallow
Saprolite
PVC
2.0
683629.00
1416995.00
811.29
3.06
808.23
46.87
49.93
31.87
46.87
34.93
49.93
15
776.36
761.36
768.86
MW-2
Landfill
6/28/1989
Shallow
Saprolite
PVC
2.0
683834.00
1415046.00
797.21
2.31
794.90
35.10
37.41
23.00
33.00
25.31
35.31
10
771.90
761.90
766.90
MW-3
Landfill
6/29/1989
Shallow
Saprolite
PVC
2.0
685991.00
1415309.00
813.07
2.07
811.00
28.15
30.22
15.90
25.90
17.97
27.97
10
795.10
785.10
790.10
MW-4
NPDES
--
Shallow
Saprolite
PVC
2.0
686723.00
1414467.00
866.42
2.67
863.75
50.20
52.87
40.20
50.20
42.87
52.87
10
823.55
813.55
818.55
MW-4D
NPDES
10/12/2006
Bedrock
Bedrock
PVC
2.0
686715.00
1414462.00
866.74
3.37
863.37
64.18
67.55
55.50
60.50
58.87
63.87
5
807.87
802.87
805.37
MW-5
Landfill
5/22/2000
Shallow
Saprolite
PVC
2.0
684782.00
1415744.00
822.69
2.50
820.19
30.71
33.21
18.00
28.00
20.50
30.50
10
802.19
792.19
797.19
Ni
CCR
10/11/2006
Deep
Transition
PVC
2.0
682253.00
1417831.00
791.19
3.04
788.15
87.53
90.57
82.53
87.53
85.57
90.57
5
705.62
700.62
703.12
MW-6S
CCR
10/12/2006
Shallow
Saprolite
PVC
2.0
682250.00
1417836.00
790.35
2.89
787.46
24.88
27.77
14.88
24.88
17.77
27.77
10
772.58
762.58
767.58
MW-7D
CCR
10/9/2006
Deep
Transition
PVC
2.0
681379.00
1417631.00
776.85
3.95
772.90
66.44
70.39
61.44
66.44
65.39
70.39
5
711.46
706.46
708.96
MW-7S
CCR
10/10/2006
Shallow
Saprolite
PVC
2.0
681375.00
1417629.00
775.99
2.89
773.10
20.60
23.49
10.60
20.60
13.49
23.49
10
762.50
752.50
757.50
MW-8D
CCR
10/10/2006
Deep
Transition
PVC
2.0
680944.00
1417513.00
775.18
3.84
771.34
97.70
101.54
92.70
97.70
96.54
101.54
5
678.64
673.64
676.14
MW-85
CCR
10/10/2006
Shallow
Saprolite
PVC
2.0
680948.00
1417509.00
775.34
3.80
771.54
27.12
30.92
17.12
27.12
20.92
30.92
30
754.42
744.42
749.42
MW-9D
CCR
10/10/2006
Deep
Transition
PVC
2.0
680637.00
1417358.00
777.38
3.04
774.34
95.20
98.24
90.20
95.20
93.24
98.24
5
684.14
679.14
681.64
MW-95
CCR
10/11/2006
Shallow
Saprolite
PVC
2.0
680639.00
1417349.00
777.34
3.12
774.22
30.78
33.90
20.78
30.78
23.90
33.90
10
753.44
743.44
748.44
OB-1(Ash Basin)
CAMA
--
Shallow
Saprolite
PVC
2.0
681741.34
1413327.90
850.57
2.98
847.59
72.51
75.49
39.70
55.50
42.68
58.48
16
807.89
792.09
799.99
OB-1(Dry Ash Landfill)
Landfill
-
Shallow
Saprolite
PVC
2.0
682648.00
1417081.00
825.85
2.25
823.60
65.50
67.75
53.20
63.20
55.45
65.45
10
770.40
760.40
765.40
OB-2(MW-6)
Landfill
-
Shallow
Saprolite
PVC
2.0
685227.10
1414675.00
919.65
2.47
917.18
122.14
124.61
102.50
117.50
104.97
119.97
15
814.68
799.68
807.18
OB-3(MW-7)
Landfill
-
Shallow
Saprolite
PVC
2.0
685380.10
1414418.00
859.16
2.60
856.56
57.25
59.85
39.00
54.00
41.60
56.60
15
8177 6
802.56
810.06
-- Information not available
1 - Water levels taken on May 22, 2017; Well depths initially measured by Pace Analytical and updated when new wells installed.
2 - "Boring Depth" is the total depth of soil boring; 'Total Well Depth" is the depth to the bottom of the filter pack.
3 - Values measured during well installation.
* Estimated until ground surface elevation is resurveyed.
^ Value does not reflect recent well modification to Flush mount
Prepared by: ENK Checked by: DMY
P:\Duke Energy Carolinas\18. MARSHALL\CSA Update January 2018\Final\Tables\Table 2-1 Well Construction Page 3 of 3

TABLE 2-2
NPDES GROUNDWATER MONITORING REQUIREMENTS
MARSHALL STEAM STATION
DUKE ENERGY CAROLINAS, LLC, TERRELL, NC
Monitoring Wells
PARAMETERS
Frequency
Laboratory Parameters
Aluminum
Antimony
Arsenic
Barium
Beryllium
Boron
Cadmium
Calcium
Cobalt
Chromium
Copper
Iron
Monitoring
Lead
Magnesium
Manganese
Molybdenum
Wells: MW-4,
Mercury
Nickel
Potassium
Selenium
MW-4D, MW-
10S, MW-10D,
MW-11S MW-
1113, MW-12S,
MW-12D, MW-
13S, MW-13D,
M W-14S, M W-
February,
June,
October
Sodium
Strontium
Thallium
Vanadium
-Zinc
Chloride
Sulfate
Alkalinity
Bicarbonate
Carbonate
Total
Dissolved
Solids
Total
Suspended
Solids
Field Parameters
14D
Turbidity
pH
Temperature
Specific
Conductance
Oxidation
Dissolved
Oxygen
Reduction
Potential
Water level
Source: Marshall Steam Station Marshall WW Permit #NC0004987 Final Report, 2016. Page 1 of 1

TABLE 2-3
SUMMARY OF ONSITE ENVIRONMENTAL INCIDENTS
MARSHALL STEAM STATION
DUKE ENERGY CAROLINAS, LLC, TERRELL, NC
Incident
Date
Location
Impacted
Brief Description
Status
#
of Incident
Media
8601
1988
UST Facility ID 00-0-
Soil
Petroleum release,
Closed in 1992
0000033150
volume of release
not confirmed
NA
June
Sanitary sewage pipe
Soil
8,200 gallons of
Closed
2005
to lagoon
waste water
released
86354
2005
Vehicle fueling area,
Soil
Petroleum release,
Closed
1,000-gallon AST
volume not
confirmed
NA
2005
Coal handling track
Soil
Fuel oil release, 400
Closed
area
gallons
NA
2005
Plant intake canal
Waters of the
Ash slurry water
Closed
US
release, 100 gallons
91147
2011
Booster fan
Soil
Petroleum release,
Closed
volume not
confirmed
NA
2015
NPDES outfall 003 to
Waters of the
900 gallons of
Closed
plant intake canal
US
lubrication oil was
discharged from
NPDES outfall 003
to the plant intake
canal
91344
2015
No. 2 fuel oil line -
Soil
1,250 gallons of
Open
bottom ash line
fuel oil was
trench
released due to a
broken fitting on a
fuel oil delivery line
at the bottom ash
line trench
NA
2016
Plant intake canal
Waters of the
Limited oil sheen on
Closed
US
surface
NA
2016
Plant intake canal
Waters of the
Oil sheen on
Closed
US
surface
Note:
Modified from Original Source: HDR, Comprehensive Site Assessment Report Marshall Steam Station Ash Basin,
September 8, 2015.
P:\Duke Energy Carolinas\18. MARSHALL\CSA Update January 2018\Final\Tables\
Table 2-3 Summary of Onsite Environmental Incidents.pdf Page 1 of 1

TABLE 3-1
SOIL/MATERIAL PROPERTIES FOR ASH
MARSHALL STEAM STATION
DUKE ENERGY CAROLINAS, LLC, TERRELL, NC
Sample
Depth (ft
bgs)
Mo ural
Content3
Grain Sizes
Estimated Effective
Porosity/Specific
Yield (%)
% Gravel
% Sand
0/6Fines
Coarse?
Fine$
Coarse9
Medium10
Fine"
Silt12
Clay13
AL-2D
23-25
24.9
0.0
0.0
0.0
0.1
11.7
78.4
9.8
8.0
AB-3D
29-30.5
45.1
0.0
11.2
7.9
22.0
38.5
19.4
1.4
32.0
AB-4D
19-20.5
86.7
0.0
0.6
3.4
11.3
54.2
29.1
1.4
29.0
AL-4D
5-7
25.4
0.0
0.0
0.0
0.2
12.7
77.6
9.5
8.5
AL-4D
20-22
19.8
0.0
0.0
0.1
0.4
14.9
73.2
11.4
9.0
AB-6D
9-10.5
56.1
0.0
0.3
1.0
2.2
45.6
49.6
1.3
23.0
AB-7D
0-2.5
-
0.0
0.0
0.0
0.7
1 13.6
70.8
14.9
7.5
AB-12D
39-40.5
32.1
0.0
0.0
0.2
0.8
21.7
68.0
9.3
12.0
AB-15
44-45
28.7
0.0
0.0
0.3
0.9
12.2
72.4
14.2
7.5
AB-18D
9-10.5
59.8
0.0
1.2
1.7
1.1
24.0
67.4
4.6
16.0
Notes:
1. Table was modified from original CSA submittal to represent analysis of ash samples only: HDR, Comprehensive Site Assessment Report Marshall Steam Station Ash Basin, September 8, 2015.
2. ASTM Standard D 2487, Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System)
3. ASTM Standard D 854, "Standard Test Methods for Specific Gravity of Soil Solids by Water Pycnometer"
4. ASTM Standard D 2216, "Standard Test Methods for Laboratory Determination of Water (Moisture) Content of Soil and Rock by Mass
5. ASTM Standard D 4318, "Standard Test Methods for Liquid Limit, Plastic Limit, and Plasticity Index of Soils
6. ASTM Standard D 422, "Standard Test Method for Particle -Size Analysis of Soils
7. ASTM Standard D 5084, "Standard Test Methods for Measurement of Hydraulic Conductivity of Saturated Porous Materials Using a Flexible Wall Permeameter"
8. Coarse Gravel: 19.Omm - 75mm
9. Fine Gravel: 4.75mm - 19.Omm
10. Coarse Sand: 2.Omm - 4.75mm
11. Medium Sand: 0.425mm - 2.Omm
12. Fine Sand: 0.075mm - 0.425mm
13. Silt: 0.005mm - 0.075mm
14. Clay: <0.005mm
15. AB-15D represented on laboratory reports as AB-15
16. GWA-3GTB represented on laboratory reports as GWA-3GT
P:\Duke Energy Carolinas\18. MARSHALL\CSA Update January 2018\Final\Tables\Table 3-1 Physical Properties of Ash Page 1 of 1

TABLE 3-2
ASH, ROCK, AND SOIL COMPOSITION
MARSHALL STEAM STATION
DUKE ENERGY CAROLINAS, LLC, TERRELL, NC
Fly Ash*
Bottom Ash*
Rock**
Soil***
Aluminum, mg/kg
70,000 - 140,000
59,000 - 130,000
9,800 - 96,000
15,000 - 100,000
Calcium, mg/kg
7,400 - 150,00
5,700 - 150,000
6,000 - 83,000
1,500 - 62,000
Iron, mg/kg
34,000 - 130,000
40,000 - 160,000
8,800 - 95,000
7,000 - 50,000
Silicon, mg/kg
160,000 - 270,000
160,000 - 280,000
57,000 - 380,000
230,000 - 390,000
Magnesium, mg/kg
3,900 - 23,000
3,400 - 17,000
700 - 56,000
1,000- 15,000
Potassium, mg/kg
6,200 - 21,000
4,600 - 18,000
4,000 - 45,000
4,500 - 25,000
Sodium, mg/kg
1,700 - 17,000
1,600 - 11,000
900 - 34,000
1,000- 20,000
Sulfur, mg/kg
1,900 - 34,000
BDL - 15,000
200 - 42,000
840 - 1,500
Titanium, mg/kg
4,300 - 9,000
4,100 - 7,200
200 - 5,400
1,000 - 5,000
Antimony, mg/kg
BDL - 16
All BDL
0.08 - 1.8
BDL - 1.3
Arsenic, mg/kg
22 - 260
2.6 - 21
0.50 - 14
2.0 - 12
Barium, mg/kg
380 - 5,100
380 - 3,600
67 - 1,400
200 - 1,000
Beryllium, mg/kg
2.2 - 26
0.21 - 14
0.10 - 4.4
BDL - 2.0
Boron, mg/kg
120 - 1,000
BDL - 335
0.2 - 220
BDL - 70
Cadmium, mg/kg
BDL - 3.7
All BDL
0.5 - 3.6
BDL - 0.5
Chromium, mg/kg
27 - 300
51 - 1,100
1.9 - 310
15 - 100
Copper, mg/kg
62 - 220
39 - 120
10 - 120
5.0 - 50
Lead, mg/kg
21 - 230
8.1 - 53
3.8 - 44
BDL - 30
Manganese, mg/kg
91 - 700
85 - 890
175 - 1,400
100 - 1,000
Mercury, mg/kg
0.01 - 0.51
BDL - 0.07
0.1 -2.0
0.02 - 0.19
Molybdenum, mg/kg
9.0 - 60
3.8 - 27
1.0 - 16
All BDL
Nickel, mg/kg
47 - 230
39 - 440
2.0 - 220
5.0 - 30
Selenium, mg/kg
1.8- 18
BDL - 4.2
0.60 - 4.9
BDL - 0.75
Strontium, mg/kg
270 - 3,100
270 - 2,000
61 - 890
20 - 500
Thallium, mg/kg
BDL - 45
All BDL
0.1 - 1.8
0.20 - 0.70
Uranium, mg/kg
BDL - 19
BDL - 16
0.84 - 43
1.2 - 3.9
Vanadium, mg/kg
BDL - 360
BDL - 250
19 - 330
20 - 150
Zinc, mg/kg
63 - 680
16 - 370
25 - 140
22 - 99
Notes:
BDL- Below Detection Limit
*Source for most fly ash data is EPRI CP-INFO Database3. Beryllium„ Thallium, Mercury (bottom ash only) and Boron (bottom ash
only) are from the EPRI PISCES Database6
**Source for rock data is US Geological Survey National Geochemical database.?
***Source for most soils data is Shacklette and Boerngen (1984)8; Cadmium and Thallium data are from Smith et al (2005).9
mg/kg = miligram per kilogram
Table was obtained from the EPRI Technical update- Coal Combustion Products -
Environmental Issue, Coal Ash: Characteristics, management, and
Environmental Issues, Table 2, pg 5, EPRI, 2009.
P:\Duke Energy Carolinas\18. MARSHALL\CSA Update January 2018\Final\Tables\
Table 3-2 Ash, Rock, and Soil Composition (EPRI) Page 1 of 1

Table 3-3. Cation/Anion Sample Results
Analyte
Aluminum
Antimony
Arsenic
Barium
Beryllium
Boron
Cadmium
Chromium
Cobalt
Copper
Iron
Lead
Manganese
CAS RN
7429-90-5
7440-36-0
7440-38-2
7440-39-3
7440-41-7
7440-42-8
7440-43-9
7440-47-3
7440-48-4
7440-50-8
7439-89-6
7439-92-1
7439-96-5
Result Unit
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
NCDENR Industrial Health PSRG
100000
94
3
44000
460
46000
200
100000
70
9400
100000
800
5200
NCDENR Protection of Groundwater PSRG
NS
0.9
5.8
580
63
45
3
360000
0.9
700
150
270
65
Sample Name
Sample Date
AB-31D(3-5)
5/18/2015
1990
5.3 U
10
44.6
0.26 J
13.3 U
0.64 U
3.8
5.3 U
6.3
4520
5.3 U
24.1
AB-3D(64-65.5)
5/18/2015
17400
8.8 U
50.6
444
3
33.7
1.1 U
20.2
11.1
38.3
15300
18.1
144
AB-4SL(3.5-5)
5/21/2015
5180
7.8 U
22.1
168
1.5
19.4 U
0.93 U
10
5.2 J
19.6
5400
7.7 J
30.3
AB-4D(4-5.5)
5/21/2015
1330
5.3 U
7_9
24.7
0.13 J
13.3 U
0.64 U
2.4
5.3 U
4.4
3220
5.3 U
23.1
AB-4D(9-10.5)
5/21/2015
2070
7.1 U
37.2
91.7
0.22 J
17.7 U
0.85 U
4.6
7.1 U
8.7
10000
7.1 U
41.7
AB-5D(3-5)
5/20/2015
1650
6.6 U
6.6 U
44.5
0.24 J
16.6 U
0.8 U
2.7
6.6 U
9.5
4330
6.6 U
18.5
AB-5D(38-39)
5/21/2015
24300
8.2 U
78.1
437
2.3
20.6 U
0.99 U
27.7
22.4
41.6
36900
20.3
782
AB-5D(40-42)
5/21/2015
17700
5.6 U
5.6 U
176
0.51
13.9 U
0.67 U
81.2
13
6.6
22800
5.1 J
233
AB-6BR(3-5)
5/29/2015
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
AB-6D(44-50.5)
4/16/2015
19100
6.8 U
49.6
535
2.1
16 J
0.82 U
74.1
17.5
41.5
23100
19.8
176
AB-7D(3-5)
5/11/2015
10800
6.4 U
56.1
250
3.4
39.5
0.77 U
22.5
13.5
40.7
5050
24.7
22.9
AB-7D(19-20.5)
5/11/2015
18500
7.2 U
8
247
1.5
18 U
0.86 U
77.5
10.9
31.5
32500
17.9
174
AB-8D(3-5)
5/14/2015
4850
7.9 U
23.7
149
1.3
19.8 U
0.95 U
10.6
4.4 J
16
6540
7.4 J
32.6
AB-10D(3-5)
5/1/2015
21500
6.7 U
59.2
612
2.8
15.1 J
0.81 U
34.8
12.8
38
23900
20.9
185
AB-10D(48-49)
5/2/2015
12000
6.5 U
74
234
1.8
27.8
0.79 U
21
6.4 J
29.2
8560
14.4
64.1
AB-12D(3-5)
4/30/2015
10800 J+
6 U
6 U
126 J+
0.69
15.1 U
0.72 U
27.7
13.4
17
21700 J-
6.9
310 J+
AB-12D(49-50.5)
4/30/2015
6720
6.7 U
3.9 J
130
0.27 J
16.8 U
0.8 U
18.7
4.6 J
7.6
8950
5 J
87.1
AB-13D(3-5)
5/18/2015
12900
6.6 U
73
291
2.9
19.9
0.8 U
25.1
91
47.8
7780
19.7
98.4
AB-13D(59-60)
5/18/2015
5410
8.6 U
17.7
193
0.75
21.5 U
1 U
9.7
8.6 U
20.3
5330
8.6 U
39.2
AB-14D(3-5)
6/3/2015
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
AB-14D(34-35.5)
6/4/2015
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
AB-15D(3-5)
5/15/2015
15700
8.2 U
52.9
290
3.4
12 J
0.99 U
30.9
11.5
52.3
13900
25.9
149
AB-15D(43-44)
5/6/2015
10300
6.8 U
63.5
246
2
19.3
0.81 U
21.6
6.8 J
35.6
8650
14.2
50.9
AB-17D(22-23)
5/14/2015
8350
7.3 U
28.8
179
2.6
21.2
0.87 U
19.3
10
34.8
5840
17.2
69.4
AB-18D(3-5)
6/30/2015
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
AB-20D(3-5)
6/3/2015
12400
6.7 U
37.6
312
3.3
56.9
0.63 J
22.2
12.4
43.7
10900
22.8
44
AB-20D(86-87)
6/4/2015
5290
6.7 U
34.5
161
0.98
11.7 J
0.8 U
10.8
4.7 J
16.8
8900
5.2 J
60.7
AB-21D(25-30)
6/23/2015
3860
10.1 U
5.1 J
131
0.54
25.1 U
1.2 U
23.5
10.1 U
11.6
5960
10.1 U
25
AL-2D(3-5)
5/13/2015
15500
6.6 U
53.7
455
4.1
21.9
0.79 U
33.5
15.4
46.5
10400
22.1
79.8
AL-2D(86-88)
5/13/2015
19800
6.4 U
113
344
6.2
174
0.56 J
42.6
20.6
78
11600
43.1
65
AL-3D(3-5)
4/29/2015
12800
7 U
35.2
145
2.8
21.3
0.84 U
24.1
11_6
36.3
7090
19.6
37.4
AL-3D(110-112)
4/30/2015
12600
6.2 U
61.2
321
2.8
50.7
0.75 U
24.2
10.3
44.3
10000
19.6
73.6
AL-4D(3-5)
5/14/2015
15000
6.2 U
44.2
470
3.8
13 J
0.74 U
41.9
12.7
42.2
11100
20.9
110
AL-4D(77-79)
5/14/2015
14200
6.7 U
88.4
268
4.6
102
0.4 J
31.3
14.9
58.6
8220
28.7
27.2
SB-2(3-5)
4/23/2015
11900 J+
6.6 U
62.3
493 J+
4 J+
17.7
0.79 U
22.4
12
46.4 J+
8890 J+
23.2
118 J+
SB-2(58-59)
4/23/2015
8680
8.1 U
40.6
125
4.5
39.3
0.98 U
16.3
10
31
4300
18
23.4
SB-3(3-5)
3/23/2015
11900
6.3 U
54
301
3.1
19.2
0.75 U
23.3
11_4
49.9
9060
23.8
81
SB-3(72.5-74.5)
4/22/2015
18200
7.4 U
81.8
361
3.6
38
0.89 U
36.9
12.8
59.1
10100
31.3
71.3
SB-4(3-5)
4/29/2015
12400
8.5 U
35.5
197
2.9
48.6
1 U
22.6
10.3
36.7
13000
19.8
52.3
SB-4(43-45)
4/29/2015
10700
7.3 U
50.5
211
3.1
102
0.88 U
20.2
10.2
37
6990
20.5
33.5
SB-5(3-5)
4/25/2015
12900
7.4 U
70.1
224
3.4
75.6
0.89 U
31.2
13.6
41.4
9450
23.2
37.3
SB-5(45.5-46.5)
4/28/2015
12100
6.8 U
41.7
213
3.2
115
0.82 U
24.2
12
39.7
8470
22.6
35.8
SB-7(3-5)
4/30/2015
9400
6 U
53.9
303
2.8
51
0.73 U
20.5
10
36.2
7110
19.5
31.7
SB-7(53-54)
4/30/2015
8620
6.2 U
4.6 J
64
0.4
15.5 U
0.74 U
20.6
68
15.7
17500
11
105
SB-7(57.5-59.5)
4/30/2015
13100
7 U
56.7
407
4.3
44.7
0.84 U
26
16
45.4
9780
26.5
38.2
SB-8(3-5)
4/14/2015
10300
6.8 U
62.2
304
3.3
18.3
0.81 U
20.8
11.3
42
8540
23.2
46.1
SB-10(3-5)
5/15/2015
5850
8 U
30.3
188
1.4
20.1 U
0.97 U
18.3
7.4 J
16.2
13300
5.9 J
70
SB-10(17.5-19.5)
5/15/2015
20900
7.2 U
127
360
4.4
36.5
0.6 J
38.7
15.6
60.7
12600
63.8
86.6
SB-11(3-5)
5/12/2015
4810
9.4 U
18.2
126
1.4
23.4 U
1.1 U
16
6.2 J
21.7
8720
7.1 J
35.7
SB-11(28-30)
5/19/2015
1790
6.8 U
19.7
41.8
0.29 J
17 U
0.82 U
3.4
6.8 U
5.9
3560
6.8 U
11.1
SB-13(3-5)
3/19/2015
14300
2.3 J
105
279
5.8
51_9
0.53
35.8
17.6
69
6750
35.4
53
SB-13(11.4-12.1)
3/19/2015
7100
3.7 U
43.5
115
1.8
26.7
0.45 U
16.5
96
30.1
5620
16.7
27.9
SB-14(3-5)
5/4/2015
4450
8.5 U
19.1
130
0.6
21.1 U
1 U
10.8
8.5 U
9.5
9540
8.5 U
54.4
SB-14(22-24)
6/30/2015
4960 J+
8.8 U
25.1
159 J+
0.99
24.8
1.1 U
10.8
8.8 U
17
6380 J+
4.9 J
41.3
SB-14(28.5-29.5)
5/19/2015
8020
10.7 U
207
168
1.4
28.9
1.3 U
16.9
6.4 J
30.8
7320
10.3 J
73.8
Marshall Steam
Source: HDR, Comprehensive Site Assessment Report Marshall Steam Station Ash Basin, September 8, 2015. Station Page 1 of 6

Table 3--3. Cation/Anion Sample Results
Analyte
Aluminum
Antimony
Arsenic
Barium
Beryllium
Boron
Cadmium
Chromium
Cobalt
Copper
Iron
Lead
Manganese
CAS RN
7429-90-5
7440-36-0
7440-38-2
7440-39-3
7440-41-7
7440-42-8
7440-43-9
7440-47-3
7440-48-4
7440-50-8
7439-89-6
7439-92-1
7439-96-5
Result Unit
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
NCDENR Industrial Health PSRG
100000
94
3
44000
460
46000
200
100000
70
9400
100000
800
5200
NCDENR Protection of Groundwater PSRG
NS
0.9
5.8
580
63
45
3
360000
0.9
700
150
270
65
Sample Name
Sample Date
S13-15(3-5)
5/2/2015
6830 J+
6 U
87.7
165 J+
1.4
11.1 J
0.72 U
31 J-
6.5
26.3
23500 J-
20.8
38.1 J+
SB-15(82.5-83.5)
5/5/2015
15500
8.3 U
39.7
390
2.2
16.4 J
1 U
21
10
36.1
13300
15
105
General Notes:
mg/kg - milligrams per kilogram
NA - Not analyzed or not reported by analytical laboratory
Std. Units - pH units
Comparison Criteria:
NS - No applicable standard for this parameter
Shading indicates exceedance of either applicable criteria.
bold - indicates exceedance of NCDENR Industrial Health
Based PSRG
Italic/underline- indicates exceedance of NCDENR Protection
of Groundwater PSRG
North Carolina Department of Environment and Natural
Resources Division of Waste Management Soil Remediation
Goals Table (March 2015) - Preliminary Industrial Health
Based Soil Remediation Goal (PSRG) and Protection of
Groundwater PSRG.
"Note: No PSRG for Total Chromium is currently available,
as a surrogate the PSRG for Trivalent Chromium was used
for comparison purposes only.
Qualifier Notes:
U -- Not detected above the reporting detection limit.
J -- Estimated Concentration
J+ -- Estimated concentration, biased high.
J- --Estimated concentration, biased low.
Marshall Steam
Source: HDR, Comprehensive Site Assessment Report Marshall Steam Station Ash Basin, September 8, 2015. Station Page 2 of 6

Table 3-3. Cation/Anion Sample Results
Analyte
Mercury
Molybdenum
Nickel
Selenium
Strontium
Thallium
Vanadium
Zinc
Calcium
Chloride
Magnesium
Nitrate
Potassium
CAS RN
7439-97-6
7439-98-7
7440-02-0
7782-49-2
7440-24-6
7440-28-0
7440-62-2
7440-66-6
7440-70-2
16887-00-6
7439-95-4
14797-55-8
7440-09-7
Result Unit
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
NCDENR Industrial Health PSRG
8
1200
4400
1200
100000
2.4
1200
70000
NS
NS
NS
100000
NS
NCDENR Protection of Groundwater PSRG
1
NS
130
2.1
NS
0.28
6
1200
NS
NS
NS
NS
NS
Sample Name
Sample Date
AB-31D(3-5)
5/18/2015
0.058
2.7 U
4.9
5.3 U
29.6
5.3 U
7_8
30.5
806
274 UJ
256
27.4 UJ
235 J
AB-31D(64-65.5)
5/18/2015
0.017
4.4 U
17.8
7.6 J
370
8.8 U
57.7
28.2
8950
416 UJ
3110
41.6 UJ
2900
AB-4SL(3.5-5)
5/21/2015
0.1
3.9 U
10.7
86
73.7
7.8 U
24.2
14.4
1150
389 UJ
387
38.9 UJ
715
AB-4D(4-5.5)
5/21/2015
NA
2.7 U
2.5
5.3 U
19.1
5.3 U
4.2 J
2.7 J
674
263 UJ
210
26.3 UJ
134 J
AB-4D(9-10.5)
5/21/2015
0.17
2.8 J
4.4
7.1 U
17.3
7.1 U
10
7.1 U
354
356 UJ
189
35.6 UJ
196 J
AB-5D(3-5)
5/20/2015
0.0065 J
3.3 U
3
6.6 U
21.3
6.6 U
4.9 J
4 J
493
312 UJ
302
31.2 UJ
291 J
AB-5D(38-39)
5/21/2015
0.2
78.5
23.7
11.5
129
8.2 U
109
92.4
2400
399 UJ
9620
39.9 UJ
8920
AB-5D(40-42)
5/21/2015
0.032
2.8 U
16.7
5.6 U
57.2
5.6 U
49.2
51.6
7240
279 UJ
15000
27.9 UJ
11100
AB-6BR(3-5)
5/29/2015
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
AB-6D(44-50.5)
4/16/2015
NA
3.4 U
59.9
8.3
226
6.8 U
86.9
50.5
5960
352 U
8340
35.2 UJ
5280
AB-7D(3-5)
5/11/2015
0.18
8.3
24.5
17.9
168
6.4 U
76.6
42
2830
306 UJ
705
30.6 UJ
1600
AB-7D(19-20.5)
5/11/2015
0.22
3.6 U
38.3
7.2 U
102
7.2 U
103
44.8
1530
366 UJ
6950
36.6 UJ
3360
AB-8D(3-5)
5/14/2015
0.052
2.5 J
11
7.4 J
55.8
7.9 U
24.1
32.1
652
397 UJ
494
39.7 UJ
735
AB-10D(3-5)
5/1/2015
0.18
3.4 U
26.8
5.6 J
266
6.7 U
94.3
65.5
4250
342 UJ
6570
34.2 UJ
6950
AB-10D(48-49)
5/2/2015
0.099
2.4 J
14.1
7.4
156
6.5 U
48.6
30.4
2420
328 UJ
1310
32.8 UJ
2560
AB-12D(3-5)
4/30/2015
NA
3 UJ
13.1
6 U
10.7
6 U
52.1
40.9
1020
295 UJ
3500 J+
29.5 UJ
1930 J+
AB-12D(49-50.5)
4/30/2015
NA
3.4 U
9
6.7 U
33.4
6.7 U
34.7
20.7
428
336 UJ
3090
33.6 UJ
2490
AB-13D(3-5)
5/18/2015
0.2 J-
3.3 U
19.2
6.6 U
227
6.6 U
57
38.4
3240
324 UJ
1120
32.4 UJ
2220
AB-13D(59-60)
5/18/2015
NA
4.3 U
7.2
4.4 J
90.3
8.6 U
19.9
9.7
1310
417 UJ
619
41.7 UJ
1110
AB-14D(3-5)
6/3/2015
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
AB-14D(34-35.5)
6/4/2015
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
AB-15D(3-5)
5/15/2015
0.12
4.1 U
21.6
6.7 J
157
8.2 U
76.1
47.6
2240
389 UJ
934
38.9 UJ
2170
AB-15D(43-44)
5/6/2015
0.2
3.4 U
14.7
13.7
146
6.8 U
47.9
30.3
1850
334 UJ
811
33.4 UJ
2010
AB-17D(22-23)
5/14/2015
NA
2 J
18.1
11_4
116
7.3 U
52.6
29.3
1330
361 UJ
601
36.1 UJ
1130
AB-18D(3-5)
6/30/2015
0.09
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
AB-20D(3-5)
6/3/2015
0.43
3.6
26
24.8
309
6.7 U
78.1
39.1
8050
326 U
921
32.6 UJ
1510
AB-20D(86-87)
6/4/2015
0.04
3.3 U
9.7
3.5 J
95
6.7 U
19.7
11
1760
329 U
620
32.9 UJ
923
AB-21D(25-30)
6/23/2015
0.011 J
5 U
9
10.1 U
65.2
10.1 U
12.4
5.2 J
648
494 U
850
49.4 UJ
754
AL-2D(3-5)
5/13/2015
0.19
12.7
35.4
22.7
214
6.6 U
70.7
34.8
2820
314 U
3520
31.4 UJ
3020
AL-2D(86-88)
5/13/2015
0.15
2.3 J
37.2
26.9
554
6.4 U
139
62.8
9010
322 U
2470
32.2 UJ
2740
AL-3D(3-5)
4/29/2015
0.17
10.4
19.9
17.9
106
7 U
64.2
32.1
1280
337 U
1270
33.7 UJ
1920
AL-3D(110-112)
4/30/2015
0.18
5
18.9
13.6
286
6.2 U
68.3
34.4
4500
311 U
1560
31.1 UJ
2800
AL-4D(3-5)
5/14/2015
0.14
11.2
32.4
16.8
185
6.2 U
68.6
35.3
2500
303 U
3620
30.3 UJ
3390
AL-4D(77-79)
5/14/2015
0.32
12.5
28.3
26.1
193
6.7 U
88.3
40.9
3250
322 U
1040
32.2 UJ
2030
SB-2(3-5)
4/23/2015
0.049
9.7
21.5
17.7
185 J+
6.6 U
59.6
26.2
1120
335 UJ
977
33.5 UJ
2040 J+
SB-2(58-59)
4/23/2015
0.2
10.3
20.9
20.8
104
8.1 U
45
28.4
1380
392 UJ
752
39.2 UJ
1660
SB-3(3-5)
3/23/2015
0.29
6.6
20
17.3
165
6.3 U
67.6
35.6
1230
321 UJ
1720
32.1 UJ
2580
S13-3(72.5-74.5)
4/22/2015
0.16
3.7 U
26.5
10.5
296
7.4 U
83
54.5
3570
363 UJ
1820
36.3 UJ
3680
SB-4(3-5)
4/29/2015
NA
4.3 U
19.7
18.7
171
8.5 U
70.2
34.6
3750
402 UJ
1070
40.2 UJ
1610
S13-4(43-45)
4/29/2015
NA
9.6
21.9
22.6
179
7.3 U
55.5
34.3
3850
367 UJ
902
36.7 UJ
1710
SB-5(3-5)
4/25/2015
NA
3.7 U
25.9
22.3
299
7.4 U
76
40.7
4830
366 UJ
1140
36.6 UJ
1720
SB-5(45.5-46.5)
4/28/2015
NA
8.7
23.9
21.3
187
6.8 U
69.7
40.9
5190
338 UJ
1040
44.2 J-
1850
S13-7(3-5)
4/30/2015
0.53
3 U
20.9
21_1
194
6 U
57.9
35
4930
296 UJ
851
29.6 UJ
1390
SB-7(53-54)
4/30/2015
0.17
3.1 U
7.2
6.2 U
24.9
6.2 U
45.8
17.6
540
311 UJ
1260
31.1 UJ
1450
S13-7(57.5-59.5)
4/30/2015
0.31
13
28
25.6
264
7 U
72.6
34.1
2850
345 UJ
901
34.5 UJ
1820
SB-8(3-5)
4/14/2015
NA
9.8
20.9
21.4
166
6.8 U
68.1
33
1400
337 UJ
708
33.7 UJ
1490
SB-10(3-5)
5/15/2015
0.28
2.8 J
16.6
4.9 J
90.5
8 U
29.4
16.5
1750
389 UJ
988
38.9 UJ
1050
S13-10(17.5-19.5)
5/15/2015
0.17 J+
3.3 J
30.7
11.9
283
7.2 U
96.8
63.8
3790
359 UJ
1720
35.9 UJ
3920
SB-11(3-5)
5/12/2015
0.057 J-
4.7 U
13.5
17.6
62.2
9.4 U
27.1
14.5
861
453 UJ
309
45.3 UJ
670
S13-11(28-30)
5/19/2015
0.026 J-
3.4 U
4.3
6.8 U
24.3
6.8 U
6.7 J
6.8 U
287
343 UJ
175
34.3 UJ
349
SB-13(3-5)
3/19/2015
0.18
1.1
26
16.1
250
4 U
113
48.2
2390
372 U
1010
37.2 UJ
2190
SB-13(11.4-12.1)
3/19/2015
0.084
6
15
10.7
101
3.7 U
53.6
24.5
1750
369 U
518
36.9 UJ
1110
S13-14(3-5)
5/4/2015
0.021 J-
7
10.7
8.5 U
59.8
8.5 U
16.4
11.1
1020
399 UJ
1080
39.9 UJ
1290
SB-14(22-24)
6/30/2015
0.053
3.2 J
8.2
6.5 J-
103 J+
8.8 U
21.2
11.4
1600
443 UJ
530
44.3 UJ
969 J+
S13-14(28.5-29.5)
5/19/2015
0.16 J-
105
13.2
11_1
137
10.7 U
36.6
22.3
1910
507 UJ
945
50.7 UJ
1770
Marshall Steam
Source: HDR, Comprehensive Site Assessment Report Marshall Steam Station Ash Basin, September 8, 2015. Station Page 3 of 6

Table 3-3. Cation/Anion Sample Results
Analyte
Mercury
Molybdenum
Nickel
Selenium
Strontium
Thallium
Vanadium
Zinc
Calcium
Chloride
Magnesium
Nitrate
Potassium
CAS RN
7439-97-6
7439-98-7
7440-02-0
7782-49-2
7440-24-6
7440-28-0
7440-62-2
7440-66-6
7440-70-2
16887-00-6
7439-95-4
14797-55-8
7440-09-7
Result Unit
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
NCDENR Industrial Health PSRG
8
1200
4400
1200
100000
2.4
1200
70000
NS
NS
NS
100000
NS
NCDENR Protection of Groundwater PSRG
1
NS
130
2.1
NS
0.28
6
1200
NS
NS
NS
NS
NS
Sample Name
Sample Date
S13-15(3-5)
5/2/2015
0.41 J-
10.2
19.7
10.3
109 J+
6 U
62.3
18.5
1440
288 UJ
532
28.8 UJ
1700 J+
SB-15(82.5-83.5)
5/5/2015
0.18
4.2 U
18
7.8 J
282
8.3 U
48.1
22.1
4040
405 UJ
1780
40.5 UJ
3210
General Notes:
mg/kg - milligrams per kilogram
NA - Not analyzed or not reported by analytical laboratory
Std. Units - pH units
Comparison Criteria:
NS - No applicable standard for this parameter
Shading indicates exceedance of either applicable criteria.
bold - indicates exceedance of NCDENR Industrial Health
Based PSRG
Italic/underline- indicates exceedance of NCDENR Protection
of Groundwater PSRG
North Carolina Department of Environment and Natural
Resources Division of Waste Management Soil Remediation
Goals Table (March 2015) - Preliminary Industrial Health
Based Soil Remediation Goal (PSRG) and Protection of
Groundwater PSRG.
"Note: No PSRG for Total Chromium is currently available,
as a surrogate the PSRG for Trivalent Chromium was used
for comparison purposes only.
Qualifier Notes:
U -- Not detected above the reporting detection limit.
J -- Estimated Concentration
J+ -- Estimated concentration, biased high.
J- --Estimated concentration, biased low.
Marshall Steam
Source: HDR, Comprehensive Site Assessment Report Marshall Steam Station Ash Basin, September 8, 2015. Station Page 4 of 6

Table 3-3. Cation/Anion Sample Results
Analyte
Sodium
Sulfate
pH (field)
Total Organic
Carbon
CAS RN
7440-23-5
14808-79-8
PH
TOC
Result Unit
mg/kg
mg/kg
Std. Units
mg/kg
NCDENR Industrial Health PSRG
NS
NS
NS
NS
NCDENR Protection of Groundwater PSRG
NS
NS
NS
NS
Sample Name
Sample Date
AB-31D(3-5)
5/18/2015
266 U
274 UJ
6.2 J
27400
AB-31D(64-65.5)
5/18/2015
554
457 J-
9.7 J
24500
AB-4SL(3.5-5)
5/21/2015
388 U
389 UJ
5.8 J
23200
AB-4D(4-5.5)
5/21/2015
266 U
137 J-
6.8 J
NA
AB-4D(9-10.5)
5/21/2015
354 U
356 UJ
6.1 J
11000
AB-5D(3-5)
5/20/2015
332 U
1710 J-
3.2 J
15400
AB-5D(38-39)
5/21/2015
411 U
542 J-
6.7 J
38100
AB-5D(40-42)
5/21/2015
279 U
279 UJ
6.6 J
1140
AB-6BR(3-5)
5/29/2015
NA
NA
NA
56200 J
AB-6D(44-50.5)
4/16/2015
171 J
352 UJ
6.5 J
NA
AB-7D(3-5)
5/11/2015
322 U
2960 J-
6.2 J
66500
AB-7D(19-20.5)
5/11/2015
360 U
366 UJ
5.3 J
69600
AB-8D(3-5)
5/14/2015
396 U
275 J-
4 J
37000
AB-10D(3-5)
5/1/2015
249 J
342 UJ
6.9 J
52400
AB-10D(48-49)
5/2/2015
281 J
328 UJ
8.2 J
10400
AB-12D(3-5)
4/30/2015
301 U
379 J-
NA
NA
AB-12D(49-50.5)
4/30/2015
335 U
336 UJ
5.2
NA
AB-13D(3-5)
5/18/2015
346
324 UJ
6.2 J
NA
AB-13D(59-60)
5/18/2015
429 U
417 UJ
7.8
NA
AB-14D(3-5)
6/3/2015
NA
NA
NA
28500
AB-14D(34-35.5)
6/4/2015
NA
NA
NA
31400
AB-15D(3-5)
5/15/2015
262 J
389 UJ
5.6 J
57700
AB-15D(43-44)
5/6/2015
202 J
334 UJ
7.1 J
39500
AB-17D(22-23)
5/14/2015
363 U
189 J-
5.8 J
NA
AB-18D(3-5)
6/30/2015
NA
NA
NA
33800
AB-20D(3-5)
6/3/2015
340
5500
7.4 J
91000
AB-20D(86-87)
6/4/2015
334 U
270 J
7.1 J
25700
AB-21D(25-30)
6/23/2015
503 U
690
4.8 J
114000
AL-2D(3-5)
5/13/2015
286 J
251 J-
6.5 J
58700
AL-2D(86-88)
5/13/2015
588
9150 J-
8.2 J
42600
AL-3D(3-5)
4/29/2015
180 J
337 UJ
6.3 J
71400
AL-3D(110-112)
4/30/2015
469
4090 J-
7.8 J
27000
AL-4D(3-5)
5/14/2015
278 J
303 UJ
6.6 J
89400
AL-4D(77-79)
5/14/2015
398
4990 J-
6.4 J
50700
SB-2(3-5)
4/23/2015
201 J
335 UJ
6.3 J
82900
S13-2(58-59)
4/23/2015
251 J
2710 J-
6.2 J
95200
SB-3(3-5)
3/23/2015
190 J
321 UJ
6.3 J
56100
S13-3(72.5-74.5)
4/22/2015
497
363 UJ
8.3 J
39200
SB-4(3-5)
4/29/2015
243 J
1770 J-
7.5 J
NA
SB-4(43-45)
4/29/2015
369
3970 J-
7.2 J
NA
S13-5(3-5)
4/25/2015
369 J
2120 J-
7.5 J
NA
S13-5(45.5-46.5)
4/28/2015
387
5270 J-
6.9 J
NA
SB-7(3-5)
4/30/2015
238 J
5190 J-
7 J
78100
SB-7(53-54)
4/30/2015
310 U
171 J-
5.2 J
67100
SB-7(57.5-59.5)
4/30/2015
265 J
3900
6.2 J
80500
S13-8(3-5)
4/14/2015
338 U
337 UJ
6.3 J
NA
SB-10(3-5)
5/15/2015
402 U
389 UJ
7.9 J
72800
S13-10(17.5-19.5)
5/15/2015
510
359 UJ
7.6 J
35600
SB-11(3-5)
5/12/2015
469 U
453 U
4.8 J
131000 J-
SB-11(28-30)
5/19/2015
340 U
205 J-
5.4 J
26400 J-
S13-13(3-5)
3/19/2015
290
372 U
6.4 J-
38000
SB-13(11.4-12.1)
3/19/2015
125
897
6.4 J-
33000
S13-14(3-5)
5/4/2015
423 U
271 J-
7 J
16600 J-
SB-14(22-24)
6/30/2015
1 440 U
362 J
7.8 J-
45500
SB-14(28.5-29.5)
5/19/2015
1 535 U
1 731 J-
17.9 J
1 88800 J-
Marshall Steam
Source: HDR, Comprehensive Site Assessment Report Marshall Steam Station Ash Basin, September 8, 2015. Station Page 5 of 6

Table 3-3. Cation/Anion Sample Results
Analyte
Sodium
Sulfate
pH (field)
Total Organic
Carbon
CAS RN
7440-23-5
14808-79-8
PH
TOC
Result Unit
mg/kg
mg/kg
Std. Units
mg/kg
NCDENR Industrial Health PSRG
NS
NS
NS
NS
NCDENR Protection of Groundwater PSRG
NS
NS
NS
NS
Sample Name
Sample Date
S13-15(3-5)
5/2/2015
299 U
1680 J-
4.5 J
73200 J-
SB-15(82.5-83.5)
5/5/2015
473
405 U
7.8 J
95400
General Notes:
mg/kg - milligrams per kilogram
NA - Not analyzed or not reported by analytical laboratory
Std. Units - pH units
Comparison Criteria:
NS - No applicable standard for this parameter
Shading indicates exceedance of either applicable criteria.
bold - indicates exceedance of NCDENR Industrial Health
Based PSRG
Italic/underline- indicates exceedance of NCDENR Protection
of Groundwater PSRG
North Carolina Department of Environment and Natural
Resources Division of Waste Management Soil Remediation
Goals Table (March 2015) - Preliminary Industrial Health
Based Soil Remediation Goal (PSRG) and Protection of
Groundwater PSRG.
"Note: No PSRG for Total Chromium is currently available,
as a surrogate the PSRG for Trivalent Chromium was used
for comparison purposes only.
Qualifier Notes:
U -- Not detected above the reporting detection limit.
J -- Estimated Concentration
J+ -- Estimated concentration, biased high.
J- --Estimated concentration, biased low.
Marshall Steam
Source: HDR, Comprehensive Site Assessment Report Marshall Steam Station Ash Basin, September 8, 2015. Station Page 6 of 6

Table 3-4. Ash Sample SPLP Results
Analyte
Aluminum
Antimony
Arsenic
Barium
Beryllium
Boron
Cadmium
Chromium
Cobalt
Copper
CAS RN
7429-90-5
7440-36-0
7440-38-2
7440-39-3
7440-41-7
7440-42-8
7440-43-9
7440-47-3
7440-48-4
7440-50-8
Fraction
SPLP
SPLP
SPLP
SPLP
SPLP
SPLP
SPLP
SPLP
SPLP
SPLP
Result Unit
ug/I
ug/I
ug/I
ug/I
ug/I
ug/I
ug/I
ug/I
ug/I
ug/I
15A NCAC 02L STANDARD
Nis
1
Nis
700
Nis
700
2
10
NS
1000
IMAC*
Nis
Nis
10
Nis
4
NS
NS
NS
1
NS
Sample Name
Sample Date
AB-3D(64-65.5)
5/18/2015
56.1 J
5 U
5 U
290
2 U
14.1 J
0.8 U
5 U
5 U
10 U
AB-5D(38-39)
5/21/2015
260
0.5 U
0.29 J
87.9
0.24
358
0.66
0.89
22.1
3.8
AB-6D(44-50.5)
4/16/2015
51500
2.7
144
1090
3.2
138
0.34
110
18.1
76.6
AB-10D(48-49)
5/2/2015
2550
3.1
480
180
0.57
160
0.2
18.1
1.6
19.8
AB-14D(34-35.5)
6/4/2015
17.2
0.93
20.1
274
0.2 U
95.4
0.12
1.4
2.5
3.2
AB-15D(43-44)
5/6/2015
2900
12.2
167
212
0.42
80.2
0.13
17
1.5
14.7
AL-2D(86-88)
5/13/2015
100 U
5.8
6.4
144
2 U
591
0.54 J
5 U
15.5
10 U
AL-3D(110-112)
4/30/2015
15.1
2.4
107
182
0.2 U
1400
0.08 U
0.88
0.5 U
0.55 J
SB-3(72.5-74.5)
4/22/2015
2320
9.5
189
172
0.52
155
0.13
17.9
1.5
9.2
SB-4(43-45)
4/29/2015
27.6
6.8
156
178
0.2 U
1470
0.071 J
1.9
0.2 J
0.3 J
SB-7(57.5-59.5)
4/30/2015
22.1
2.5
1
225
0.1 J
710
1.2
0.83
26.1
2.7
SB-8(24-25)
4/14/2015
15.5
3.6
7.4
210
0.2 U
634
1.5
1.5
44.1
5
SB-10(17.5-19.5)
5/15/2015
48200
2.9
133
1080
3.1
130
0.33
106
16.4
75.3
General Notes:
ug/I - micrograms per liter
NA - Not analyzed or not reported by analytical laboratory
T - Total
D - Dissolved
N - Fraction not applicable
Comparison Criteria:
NS - No applicable standard for this parameter
shading + bold - indicates exceedance of NC 2L or IMAC
Criteria.
North Carolina Department of Environment and Natural
Resources Division of Water Resources 02L Groundwater
Quality Standards and Interim Maximum Allowable
Concentrations (IMACs). April 2013
"NOTE: The IMAC value is shown where there is no applicable 02L
standard. Appendix #1 of 15A NCAC Subchapter 02L Classifications
and Water Quality Standards Applicable to the Groundwaters of North
Carolina, lists Interim Maximum Allowable Concentrations (IMACs).
The IMACs were issued in 2010 and 2011, however NCDENR has not
established a 02L standard for these constituents as described in 15A
NCAC 02L.0202(c). For this reason, IMACs are noted in this report for
reference only.
Qualifier Notes:
U -- Not detected above the reporting detection limit.
J -- Estimated Concentration
J+ -- Estimated concentration, biased high.
J- --Estimated concentration, biased low.
Marshall Steam
Source: HDR, Comprehensive Site Assessment Report Marshall Steam Station Ash Basin, September 8, 2015. Station Page 1 of 3

Table 3-4. Ash Sample SPLP Results
Analyte
Iron
Lead
Manganese
Mercury
Molybdenum
Nickel
Selenium
Strontium
Thallium
Vanadium
CAS RN
7439-89-6
7439-92-1
7439-96-5
7439-97-6
7439-98-7
7440-02-0
7782-49-2
7440-24-6
7440-28-0
7440-62-2
Fraction
SPLP
SPLP
SPLP
SPLP
SPLP
SPLP
SPLP
SPLP
SPLP
SPLP
Result Unit
ug/I
ug/I
ug/I
ug/I
ug/I
ug/I
ug/I
ug/I
ug/I
ug/I
15A NCAC 02L STANDARD
300
15
50
1
NS
100
20
NS
NS
NS
IMAC*
NS
NS
NS
NS
NS
NS
NS
NS
0.2
0.3
Sample Name
Sample Date
AB-3D(64-65.5)
5/18/2015
500 U
1 U
16.6
0.2 U
5 U
2.7 J
5 U
42.6
1 U
10 U
AB-5D(38-39)
5/21/2015
50 U
0.13
150
0.2 UJ
0.5 U
29.4
1.1
5.7
0.1 U
1 U
AB-6D(44-50.5)
4/16/2015
48700
43.2
239
0.085 J-
2.9
46.4
15
513
1.1
213
AB-10D(48-49)
5/2/2015
1540
3.1
37.6
0.04 J-
30.2
6.5
39
198
0.23
103
AB-14D(34-35.5)
6/4/2015
23 J
0.095 J
92.8
0.2 U
4.2
11.5
4.4
92.4
0.1 U
3.5
AB-15D(43-44)
5/6/2015
1580
2.8
34.5
0.2 UJ
23.3
5.1
39.5
128
0.37
135
AL-2D(86-88)
5/13/2015
500 U
2.3
188
0.2 U
73.9
16.2
18.5
1750
1.1
19.3
AL-3D(110-112)
4/30/2015
50 U
0.1 U
9.2
0.2 UJ
193
0.27 J
19.3
1560
0.12
183
SB-3(72.5-74.5)
4/22/2015
957
3.7
12.3
0.2 UJ
5.6
4.4
89.8
243
0.28
267
SB-4(43-45)
4/29/2015
50 U
0.1 U
8.6
0.2 UJ
209
0.7
284
876
0.15
127
SB-7(57.5-59.5)
4/30/2015
19.2 J
0.061 J
153
0.2 UJ
93.2
15.7
37.1
1660
1.1
17.5
SB-8(24-25)
4/14/2015
15.1 J
0.22
188
0.2 UJ
84.8
103
124
1110
0.25
48.3
SB-10(17.5-19.5)
5/15/2015
44700
41.4
215
0.072 J-
3
44.8
14.7
453
1.1
196
General Notes:
ug/I - micrograms per liter
NA - Not analyzed or not reported by analytical laboratory
T - Total
D - Dissolved
N - Fraction not applicable
Comparison Criteria:
NS - No applicable standard for this parameter
shading + bold - indicates exceedance of INC 2L or IMAC
Criteria.
North Carolina Department of Environment and Natural
Resources Division of Water Resources 02L Groundwater
Quality Standards and Interim Maximum Allowable
Concentrations (IMACs). April 2013
"NOTE: The IMAC value is shown where there is no applicable 02L
standard. Appendix #1 of 15A NCAC Subchapter 02L Classifications
and Water Quality Standards Applicable to the Groundwaters of North
Carolina, lists Interim Maximum Allowable Concentrations (IMACs).
The IMACs were issued in 2010 and 2011, however NCDENR has not
established a 02L standard for these constituents as described in 15A
NCAC 02L.0202(c). For this reason, IMACs are noted in this report for
reference only.
Qualifier Notes:
U -- Not detected above the reporting detection limit.
J -- Estimated Concentration
J+ -- Estimated concentration, biased high.
J- --Estimated concentration, biased low.
Marshall Steam
Source: HDR, Comprehensive Site Assessment Report Marshall Steam Station Ash Basin, September 8, 2015. Station Page 2 of 3

Table 3-4. Ash Sample SPLP Results
Analyte
Zinc
Calcium
Chloride
Magnesium
Nitrate
Potassium
Sodium
Sulfate
pH (field)
CAS RN
7440-66-6
7440-70-2
16887-00-6
7439-95-4
14797-55-8
7440-09-7
7440-23-5
14808-79-8
PH
Fraction
SPLP
SPLP
SPLP
SPLP
SPLP
SPLP
SPLP
SPLP
PH
Result Unit
ug/I
ug/I
ug/I
ug/I
ug/I
ug/I
ug/I
ug/I
Std. Units
15A NCAC 02L STANDARD
1000
NS
250000
NS
10000
NS
NS
250000
8.5
IMAC*
NS
NS
NS
NS
NS
NS
NS
NS
NS
Sample Name
Sample Date
AB-3D(64-65.5)
5/18/2015
50 U
1150 J+
7600 U
195
4200 J-
158 J
3330 J+
8200 J+
9.7 J
AB-5D(38-39)
5/21/2015
201
2620
8100 UJ
3710
710 J-
773
4180
54800 J
6.7 J
AB-6D(44-50.5)
4/16/2015
176
2570
5000 U
4150
200 UJ
2700
1700
4600 J+
6.5 J
AB-10D(48-49)
5/2/2015
58.7
5100
5000 UJ
1330
200 UJ
401
1250
6800 J+
8.2 J
AB-14D(34-35.5)
6/4/2015
78.2
1450
5000 U
664
200 UJ
309
1840
8600 J+
NA
AB-15D(43-44)
5/6/2015
84.7
2980
5000 U
459
200 UJ
300
1480
5100 J+
7.1 J
AL-2D(86-88)
5/13/2015
50 U
61100
6000 U
7640
250 J+
6780
4700
214000 J+
8.2 J
AL-3D(110-112)
4/30/2015
44.7
60800
6200 U
4610
250 UJ
8020
4320
235000 J+
7.8 J
SB-3(72.5-74.5)
4/22/2015
64.2
9330
7200 UJ
1460
290 UJ
362
369
5900 J+
8.3 J
SB-4(43-45)
4/29/2015
90.2
64200
7400 UJ
2050
780 J-
3600
4500
230000
7.2 J
SB-7(57.5-59.5)
4/30/2015
144
43900
7000 UJ
7560
360 J-
9050
5800
233000
6.2 J
SB-8(24-25)
4/14/2015
238
32000
5000 UJ
4320
400 J-
4090
3180
108000
NA
SB-10(17.5-19.5)
5/15/2015
175
2380
7200 UJ
3800
290 UJ
2530
1660
6700 J+
7.6 J
General Notes:
ug/I - micrograms per liter
NA - Not analyzed or not reported by analytical laboratory
T - Total
D - Dissolved
N - Fraction not applicable
Comparison Criteria:
NS - No applicable standard for this parameter
shading + bold - indicates exceedance of NC 2L or IMAC
Criteria.
North Carolina Department of Environment and Natural
Resources Division of Water Resources 02L Groundwater
Quality Standards and Interim Maximum Allowable
Concentrations (IMACs). April 2013
"NOTE: The IMAC value is shown where there is no applicable 02L
standard. Appendix #1 of 15A NCAC Subchapter 02L Classifications
and Water Quality Standards Applicable to the Groundwaters of North
Carolina, lists Interim Maximum Allowable Concentrations (IMACs).
The IMACs were issued in 2010 and 2011, however NCDENR has not
established a 02L standard for these constituents as described in 15A
NCAC 02L.0202(c). For this reason, IMACs are noted in this report for
reference only.
Qualifier Notes:
U -- Not detected above the reporting detection limit.
J -- Estimated Concentration
J+ -- Estimated concentration, biased high.
J- --Estimated concentration, biased low.
Marshall Steam
Source: HDR, Comprehensive Site Assessment Report Marshall Steam Station Ash Basin, September 8, 2015. Station Page 3 of 3

TABLE 4-1
PRIVATE SUPPLY WELL PROPERTY INFORMATION
MARSHALL STEAM STATION
DUKE ENERGY CAROLINAS, LLC, TERRELL, NC
Parcel ID #
Property Address
Street
City
State
461701079593
9053 Sherrills Ford Rd
Sherrills Ford
NC
461701092640
8012 Gregory Rd
Sherrills Ford
NC
461701091165
7983 Gregory Rd
Sherrills Ford
NC
460802973879
8086 Sherrills Ford Rd
Sherrills Ford
NC
460802976151
8112 Sherrills Ford Rd
Sherrills Ford
NC
460802976991
7958 Sherrills Ford Rd
Sherrills Ford
NC
460802877922
8027 Sherrills Ford Rd
Sherrills Ford
NC
460804729212
3102 Beatty Rd
Sherrills Ford
NC
460802954293
8303 Sherrills Ford Rd
Sherrills Ford
NC
461801069891
8101 Island Point Rd
Sherrills Ford
NC
461801060991
8009 Island Point Rd
Sherrills Ford
NC
461801067882
8083 Island Point Rd
Sherrills Ford
NC
461801066339
Island Point Rd
Sherrills Ford
NC
461701189474
Sherrills Ford Rd
Sherrills Ford
NC
461701274824
8220 Mcdonald Dr
Sherrills Ford
NC
461803100104
8790 Sherrills Ford Rd
Sherrills Ford
NC
460804909334
8819 Sherrills Ford Rd
Sherrills Ford
NC
461701085722
8913 Sherrills Ford Rd
Sherrills Ford
NC
461701097362
8883 Sherrills Ford Rd
Sherrills Ford
NC
461701097610
8861 Sherrills Ford Rd
Sherrills Ford
NC
461701275536
8244 Mcdonald Dr
Sherrills Ford
NC
461710276302
8268 Mcdonald Dr
Sherrills Ford
NC
461801163483
8125 Island Point Rd
Sherrills Ford
NC
461802672746
8628 Island Point Rd
Sherrills Ford
NC
461802571932
8486 Island Point Rd
Sherrills Ford
NC
P:\Duke Energy Carolinas\18. MARSHALL\CSA Update January 2018\Final\Tables\Table 4-1—Private Well Property
Information_BDW.docx Page 1 of 4

TABLE 4-1
PRIVATE SUPPLY WELL PROPERTY INFORMATION
MARSHALL STEAM STATION
DUKE ENERGY CAROLINAS, LLC, TERRELL, NC
Parcel ID #
Property Address
Street
City
State
461802661986
8639 Island Point Rd
Sherrills Ford
NC
461802671120
8623 Island Point Rd
Sherrills Ford
NC
461802574047
8575 Island Point Rd
Sherrills Ford
NC
461801477637
8483 Island Point Rd
Sherrills Ford
NC
461802576738
8566 Island Point Rd
Sherrills Ford
NC
461802571365
8579 Island Point Rd
Sherrills Ford
NC
461801478658
8499 Island Point Rd
Sherrills Ford
NC
460804936011
8511 Sherrills Ford Rd
Sherrills Ford
NC
460804938893
8416 Sherrills Ford Rd
Sherrills Ford
NC
461803012756
8625 Sherrills Ford Rd
Sherrills Ford
NC
460804934149
8491 Sherrills Ford Rd
Sherrills Ford
NC
460802956932
8213 Sherrills Ford Rd
Sherrills Ford
NC
460802956855
8225 Sherrills Ford Rd
Sherrills Ford
NC
460802956736
8239 Sherrills Ford Rd
Sherrills Ford
NC
461801050934
8220 Sherrills Ford Rd
Sherrills Ford
NC
461801060328
8172 Sherrills Ford Rd
Sherrills Ford
NC
460802969586
8168 Sherrills Ford Rd
Sherrills Ford
NC
460802969613
8160 Sherrills Ford Rd
Sherrills Ford
NC
460802968850
8140 Sherrills Ford Rd
Sherrills Ford
NC
460802977061
8122 Sherrills Ford Rd
Sherrills Ford
NC
460804937364
8456 Sherrills Ford Rd
Sherrills Ford
NC
460804939276
2971 Steam Plant Rd
Sherrills Ford
NC
461803031102
8510 Sherrills Ford Rd
Sherrills Ford
NC
461803021923
8526 Sherrills Ford Rd
Sherrills Ford
NC
461803023743
8538 Sherrills Ford Rd
Sherrills Ford
NC
P:\Duke Energy Carolinas\18. MARSHALL\CSA Update January 2018\Final\Tables\Table 4-1—Private Well Property
Information_BDW.docx Page 2 of 4

TABLE 4-1
PRIVATE SUPPLY WELL PROPERTY INFORMATION
MARSHALL STEAM STATION
DUKE ENERGY CAROLINAS, LLC, TERRELL, NC
Parcel ID #
Property Address
Street
City
State
461803024398
8550 Sherrills Ford Rd
Sherrills Ford
NC
461803024371
8574 Sherrills Ford Rd
Sherrills Ford
NC
461803016923
8610 Sherrills Ford Rd
Sherrills Ford
NC
461803012498
8653 Sherrills Ford Rd
Sherrills Ford
NC
460804946231
8396 Sherrills Ford Rd
Sherrills Ford
NC
461803040535
8358 Sherrills Ford Rd
Sherrills Ford
NC
460804949916
8316 Sherrills Ford Rd
Sherrills Ford
NC
460802959184
8294 Sherrills Ford Rd
Sherrills Ford
NC
460802959281
Sherrills Ford Rd
Sherrills Ford
NC
460802959229
8288 Sherrills Ford Rd
Sherrills Ford
NC
461801051307
8270 Sherrills Ford Rd
Sherrills Ford
NC
461801051629
8238 Sherrills Ford Rd
Sherrills Ford
NC
461801060122
8204 Sherrills Ford Rd
Sherrills Ford
NC
461803426350
8320 E Nc 150 Hwy
Sherrills Ford
NC
461803114647
3099 Steam Plant Rd
Sherrills Ford
NC
461801065838
8057 Island Point Rd
Sherrills Ford
NC
461802760831
Island Point Rd
Sherrills Ford
NC
461701190186
8876 Sherrills Ford Rd
Sherrills Ford
NC
461803123267
3085 Steam Plant Rd
Sherrills Ford
NC
461803008991
8722 Sherrills Ford Rd
Sherrills Ford
NC
461803009512
8768 Sherrills Ford Rd
Sherrills Ford
NC
461803003477
8771 Sherrills Ford Rd
Sherrills Ford
NC
461803018064
8704 Sherrills Ford Rd
Sherrills Ford
NC
461803009635
8756 Sherrills Ford Rd
Sherrills Ford
NC
461803018230
8680 Sherrills Ford Rd
Sherrills Ford
NC
P:\Duke Energy Carolinas\18. MARSHALL\CSA Update January 2018\Final\Tables\Table 4-1—Private Well Property
Information_BDW.docx Page 3 of 4

TABLE 4-1
PRIVATE SUPPLY WELL PROPERTY INFORMATION
MARSHALL STEAM STATION
DUKE ENERGY CAROLINAS, LLC, TERRELL, NC
Parcel ID #
Property Address
Street
City
State
461802673026
8643 Island Point Rd
Sherrills Ford
NC
461802765694
8762 Island Point Rd
Sherrills Ford
NC
461802767606
8780 Island Point Rd
Sherrills Ford
NC
461802768607
8788 Island Point Rd
Sherrills Ford
NC
461802769790
8806 Island Point Rd
Sherrills Ford
NC
461710465516
8200 E Nc 150 Hwy
Sherrills Ford
NC
461710467732
8226 E Nc 150 Hwy
Sherrills Ford
NC
461710366766
3527 Marshall Rd
Sherrills Ford
NC
461710269621
8050 E Nc 150 Hwy
Sherrills Ford
NC
461710462450
8176 E Nc 150 Hwy
Sherrills Ford
NC
461710460391
8162 E Nc 150 Hwy
Sherrills Ford
NC
461710353913
8066 E Nc 150 Hwy
Sherrills Ford
NC
461802678019
8716 Island Point Rd
Sherrills Ford
NC
461802665916
8665 Island Point Rd
Sherrills Ford
NC
461802761679
8716 Island Point Rd
Sherrills Ford
NC
461802763617
8734 Island Point Rd
Sherrills Ford
NC
461802764665
8746 Island Point Rd
Sherrills Ford
NC
461802673466
8632 Island Point Rd
Sherrills Ford
NC
461801076339
8064 Island Point Rd
Sherrills Ford
NC
461801078346
8084 Island Point Rd
Sherrills Ford
NC
461801079394
8104 Island Point Rd
Sherrills Ford
NC
461801171313
8118 Island Point Rd
Sherrills Ford
NC
461801173312
8136 Island Point Rd
Sherrills Ford
NC
461801166752
8153 Island Point Rd
Sherrills Ford
NC
Notes. -
Modified from Original Source: HDR, Comprehensive Site Assessment Report Marshall Steam Station Ash Basin,
September 8, 2015.
P:\Duke Energy Carolinas\18. MARSHALL\CSA Update January 2018\Final\Tables\Table 4-1—Private Well Property
Information_BDW.docx Page 4 of 4

Table 6-1. Soil Mineralogy Results
Boring ID
Lab Performing
Analysis
Unique Lab
Identifier
Sample Depth (ft
bgs)
Soil Mineralogical Composition
(wt %)
Quartz
K-Feldspar
Plagioclas
uscovite/Illiti
Biotite
Kaolinite
Epidote
Tremolite
Vermiculite
Hydroxylapatite
Hematite
Ilmenite
Magnetite
Mullite
Amorphous)
AB-11D
PMET
MS-01
12.5-15.0
33.3
18.5
16.7
7.3
1.9
5.8
0.7
-
-
-
-
-
-
-
15.8
A13-913R
PMET
MS-02
10-12.0
9.5
6.4
4.3
-
6.5
3.2
-
32.2
1.1
3.5
-
-
-
-
33.3
GWA-1S
PMET
MS-03
50-52
22
7.1
18.7
6.4
7.3
16.5
-
-
-
-
-
-
-
-
22
A13-113R
PMET
MS-04
33-35
22.6
24.3
-
8
5.2
24.7
-
-
-
-
-
-
-
-
15.2
GWA-113R
PMET
MS-05
14-15.5
35.1
10.8
-
8.3
2.1
24.3
-
-
-
-
1
-
-
-
18.4
AB-16D
PMET
MS-06
13-15
10.8
-
19.6
5.2
9.1
6.9
-
15.3
1
-
-
1.4
-
-
30.7
A13-2S
PMET
MS-07
31-32
35.8
8.9
-
5.2
2.3
31.9
-
-
-
-
1.1
-
-
-
15.4
AB-15D
PMET
AB-15D
20-25
9.4
-
-
-
-
-
-
-
-
-
0.9
-
1.2
20.4
68.1
A13-8D
PMET
A13-8D
30-32.5
6.6
23.3
16.4
8.1
0.8
4.9
-
-
0.8
-
0.8
-
-
-
38.3
A13-613R
PMET
AB-613R
57.5-59
2.2
7.8
19.4
-
6.2
-
-
28
1
5.3
-
-
-
I -
1 30.1
Notes:
1. Laboratory notes that samples contain amorphous smectite clays, amorphous mica, and/or amorphous iron oxide/hydroxide, but does not distinguish between them
2. Potassium Feldspar ('K-Feldspar') is a subclass of Alkali Feldspar.
3. Chemical composition of constituent minerals is as follows: Quartz - SiO2, Potassium Feldspar - (K,Na)[AlSi3O8], Plagioclase - Na[AlSi3O8]-Ca[Al2Si2O8], Muscovite - K2Al4[Si6Al2O20](OH,F)4, Illite - Kl_1.5AI4[Si7_fi.5AI1.1.5O20](OH)4, Biotite - K2(Mg,Fe+2)6.4(Fe+3,Al,Ti)0.2[
Kaolinite - AI4[S4O10](OH)8r Epidote - Ca2Fe+3A120.OH•Si2O7•SiO4, Tremolite - Ca2Mg5Si8O22(OH)2r Vermiculite -(Mg,Ca)0.7(Mg,Fe+3,Al)61(Al,Si)80201(OH)4.8H20, Hydroxylapatite - Ca5(PO4)3OH, Hematite - a-Fe2O3, Ilmenite - FeTiO3, Magnetite - Fe+2Fe2+304, MUlli
4. ft bgs = feet below ground surface
Marshall Steam Station
Source: HDR, Comprehensive Site Assessment Report Marshall Steam Station Ash Basin, September 8, 2015. Page 1 of 1

Table 6-2. Soil Chemistry Results, Elemental Composition and % Oxides
Boring
ID
Unique Lab
Identifier
Lab Performing
Analysis
Sample Depth (ft
bgs)
Elemental Composition (ppm)
As
Cd
Ce
Co
Cu
Ga
La
Mo
Ni
Pb
Sb
Se
Sn
W
Zn
Zr
AB-11D
American Assay
MS-01
12.5-15.0
5
<0.2
109
7
9
16
60
1
11
58
<1
<1
1
<1
22
27
AB-9BR
American Assay
MS-02
10-12.0
8
<0.2
162
35
48
15
86
1
202
20
<1
<1
2
<1
76
17
GWA-1S
American Assay
MS-03
50-52
8
<0.2
332
13
23
27
196
2
6
38
<1
<1
2
<1
88
19
AB-1BR
American Assay
MS-04
33-35
6
<0.2
199
10
24
25
117
2
4
57
<1
<1
2
<1
74
15
GWA-1BR
American Assay
MS-05
14-15.5
4
<0.2
76
11
16
22
47
1
7
37
<1
<1
2
<1
58
25
AB-16D
American Assay
MS-06
13-15
4
<0.2
81
42
59
23
45
4
70
24
<1
1
2
1
121
10
AB-2S
American Assay
MS-07
31-32
2
<0.2
62
13
7
19
32
2
4
27
<1
<1
2
<1
57
20
AB-15D
American Assay
AB-15D
20-25
48
0.4
328
37
139
37
67
2
75
49
4
7
7
2
1
87
AB-8D
American Assay
AB-8D
30-32.5
28
<0.2
274
19
48
25
164
1
32
46
<1
1
1
<1
62
23
AB-6BR
American Assay
AB-6BR
57.5-59
15
<0.2
304
40
37
14
147
2
152
26
<1
<1
2
<1
47
6
Notes:
1. ppm = parts per million
2. ft bgs = feet below ground surface
Marshall Steam Station
Source: HDR, Comprehensive Site Assessment Report Marshall Steam Station Ash Basin, September 8, 2015. Page 1 of 1

Table 6-3. Soil and Ash Parameters and Analytical Methods
Inorganic Compounds
Units
Method
Antimony
mg/kg
EPA 6020
Aluminum
mg/kg
EPA 6010
Arsenic
mg/kg
EPA 6020
Barium
mg/kg
EPA 6010
Beryllium
mg/kg
EPA 6020
Boron
mg/kg
EPA 6010
Cadmium
mg/kg
EPA 6020
Calcium
mg/kg
EPA 6010
Chloride
mg/kg
SM4500-CI-E
Chromium
mg/kg
EPA 6010
Cobalt
mg/kg
EPA 6020
Copper
mg/kg
EPA 6010
Iron
mg/kg
EPA 6010
Lead
mg/kg
EPA 6020
Manganese
mg/kg
EPA 6010
Mercury
mg/kg
EPA Method 7470A/7471
Molybdenum
mg/kg
EPA 6010
Nickel
mg/kg
EPA 6010
Nitrate
mg/kg
EPA 9056
pH
SU
EPA 9045
Potassium
mg/kg
EPA 6010
Selenium
mg/kg
EPA 6020
Sodium
mg/kg
EPA 6010
Strontium
mg/kg
EPA 6010
Sulfate
mg/kg
EPA 9056
Thallium (low level)
mg/kg
EPA 6020
Vanadium
mg/kg
EPA 6020
Zinc
mg/kg
EPA 6010
Total Organic Carbon
Units
Method
TOC
mg/kg
EPA 9060
Notes:
Soil samples to be analyzed for Total Inorganics using USEPA Methods 6010/6020 and pH
using USEPA Method 9045, as noted above.
Ash samples to be analyzed for Total Inorganics using USEPA Methods 6010/6020 and pH
using USEPA Method 9045; select ash samples will also be analyzed for leaching potential
using SPLP Extraction Method 1312 in conjunction with USEPA Methods 6010/6020. SPLP
results to be reported in units of mg/L for comparison to 2L Standards.
Samples to be analyzed for Total Organic Carbon using method EPA 9060. Sample result in
concentration units of mg/kg of organic carbon on a dry weight basis.
mg/kg - Milligrams per kilogram
S.U. - Standard Unit
Marshall Steam Station
Source: HDR, Comprehensive Site Assessment Report Marshall Steam Station Ash Basin, September 8, 2015. Page 1 of 1

Table 6-4. Ash Basin Surface Water, Pore Water and Seep Parameters and
Analytical Methods
Parameter
RL
Units
Method
Field Parameters
pH
NA
SU
Field Water Quality Meter
Specific Conductance
NA
mmho/cm
Field Water Quality Meter
Temperature
NA
°C
Field Water Quality Meter
Dissolved Oxygen
NA
mg/L
Field Water Quality Meter
Oxidation Reduction Potential
NA
mV
Field Water Quality Meter
Turbidity
NA
NTU
Field Water Quality Meter
Ferrous Iron
NA
mg/L
Field Test Kit
Inorganics
Aluminum
5
pg/L
EPA 200.7 or 6010C
Antimony
1
pg/L
EPA 200.8 or 6020A
Arsenic
1
pg/L
EPA 200.8 or 6020A
Barium
5
pg/L
EPA 200.7 or 6010C
Beryllium
1
pg/L
EPA 200.8 or 6020A
Boron
50
pg/L
EPA 200.7 or 6010C
Cadmium
1
pg/L
EPA 200.8 or 6020A
Chromium
1
pg/L
EPA 200.7 or 6010C
Cobalt
1
pg/L
EPA 200.8 or 6020A
Copper
0.005
mg/L
EPA 200.7 or 6010C
Iron
10
pg/L
EPA 200.7 or 6010C
Lead
1
pg/L
EPA 200.8 or 6020A
Manganese
5
pg/L
EPA 200.7 or 6010C
Mercury (low level)
0.012
pg/L
EPA 245.7 or 1631
Molybdenum
5
pg/L
EPA 200.7 or 6010C
Nickel
5
pg/L
EPA 200.7 or 6010C
Total Combined Radium (Ra-226 and Ra-228) 4
5
pCi/L
EPA 903.0
Selenium
1
pg/L
EPA 200.8 or 6020A
Strontium
5
pg/L
EPA 200.7 or 6010C
Thallium (low level)
0.2
pg/L
EPA 200.8 or 6020A
Vanadium (low level)
0.3
mg/L
EPA 200.8 or 6020A
Zinc
5
pg/L
EPA 200.7 or 6010C
Anions/Cations
Alkalinity (as CaCO3)
20
mg/L
SM 2320B
Bicarbonate
20
mg/L
SM 2320
Calcium
0.01
mg/L
EPA 200.7
Carbonate
20
mg/L
SM 2320
Chloride
0.1
mg/L
EPA 300.0 or 9056A
Magnesium
0.005
mg/L
EPA 200.7
Nitrate as Nitrogen
0.023
mg-N/L
EPA 300.0 or 9056A
Potassium
0.1
mg/L
EPA 200.7
Sodium
0.05
mg/L
EPA 200.7
Marshall Steam Station
Source: HDR, Comprehensive Site Assessment Report Marshall Steam Station Ash Basin, September 8, 2015. Page 1 of 2

Table 6-4. Ash Basin Surface Water, Pore Water and Seep Parameters and
Analytical Methods
Parameter
RL
Units
Method
Sulfate
0.1
mg/L
EPA 300.0 or 9056A
Sulfide (as HZS) 5
0.05
mg/L
SM450OS-D
Total Dissolved Solids
25
mg/L
SM 2540C
Total Organic Carbon
0.1
mg/L
SM 5310
Total Suspended Solids
2
mg/L
SM 2450D
Additional Groundwater Constituents
Arsenic (III) (V)
Vender Specific
pg/L
IC-ICP-CRC-MS
Chromium (IV) (VI)
Vender Specific
pg/L
IC-ICP-CRC-MS
Iron Speciation (Fe(II), Fe(III)
Vendor Specific
pg/L
IC-ICP-CRC-MS
Manganese Speciation (Mn(II), Mn(IV)
Vendor Specific
pg/L
IC-ICP-CRC-MS
Selenium (IV) (VI)
Vendor Specific
pg/L
RP-ICP-CRC-MS
Notes:
1. Select constituents will be analyzed for total and dissolved concentrations.
2. RL is the laboratory analytical method reporting limit.
3. NA indicates not applicable.
4. Sulfide (as HZS) will be analyzed for groundwater samples only.
5. All EPA methods and RLs are at or below the respective 2L or 213 Standard for constituents with standards
Marshall Steam Station
Source: HDR, Comprehensive Site Assessment Report Marshall Steam Station Ash Basin, September 8, 2015. Page 2 of 2

Table 6-5. Transition Zone Mineralogy Results
Boring ID
Lab Performing Analysis
Unique Lab
Identifier
Sample Depth (ft
bgs)
Mineralogical Composition (wt %)
Quartz
Feldspars
Biotite
Amphibole
Dolomite
Gibbsite
A13-71D
American Assay
MS-13
80.4-80.6
25.7
44.7
15.2
13.5
-
-
A13-41D
American Assay
MS-17
70.3-70.5
0.9
52
38
9
-
-
AB-12D
American Assay
MS-19
54-54.3
0.4
71.2
26.4
-
1
1
Notes:
ft bgs = feet below ground surface
Chemical composition of constituent minerals is as follows: Quartz - SiO2, Feldspar - (K,Na)[AlSi3O8]-Ca[Al2Si2O8], Biotite - K2(Mg,Fe+2)6_4(Fe+3,AI,Ti)0_2[Si6_,AI2_1(
Amphibole -(Ca,Na,K,Mn)2_3(Mg,Fe+2,Fe+3,AI,Ti,Mn.Cr.Li,Zn)5(Si,AI)8022(OH)2, Dolomite - CaMg(CO3)2r Gibbsite - AI(OH)3
Marshall Steam Station
Source: HDR, Comprehensive Site Assessment Report Marshall Steam Station Ash Basin, September 8, 2015. Page 1 of 1

Table 6-6. Transition Zone Results, Elemental Composition and % Oxides
Boring ID
Lab Performing
Analysis
Unique Lab
Identifier
Sample Depth (ft
bgs)
Elemental Composition (ppm)
As
Cd
Ce
Co
Cu
Ga
La
Mo
Ni
Pb
Sb
Se
Sn
W
Zn
Zr
A13-7D
American Assay
MS-13
80.4-80.6
8
<0.2
70
39
121
21
20
<1
39
14
<1
<1
4
<1
87
12
A13-4D
American Assay
MS-17
70.3-70.5
5
<0.2
324
42
129
24
134
<1
36
19
<1
<1
4
<1
87
13
AB-12D
American Assay
MS-19
54-54.3
7
<0.2
442
22
60
23
203
<1
13
30
<1
<1
6
<1
60
15
Notes:
ft bgs = feet below ground surface
ppm = parts per million
Marshall Steam Station
Source: HDR, Comprehensive Site Assessment Report Marshall Steam Station Ash Basin, September 8, 2015. Page 1 of 1

Table 6-7. Whole Rock Chemistry Results, Elemental Composition and % Oxides
Boring ID
Lab Performing
Analysis
Unique Lab
Identifier
Sample Depth
(ft bgs)
Elemental Composition (ppm)
As
Cd
Ce
Co
Cu
Ga
La
Mo
Ni
Pb
Sb
Se
Sn
W
Zn
Zr
AL-3D
American Assay
MS-11
186.9-187.0
8
<0.2
379
19
31
17
206
1
15
63
2
<1
1
<1
55
24
AB-6D
American Assay
MS-12
63.9-64
11
<0.2
290
43
71
12
127
2
182
37
2
<1
2
<1
80
13
A13-7D
American Assay
MS-14
88.7-89.0
3
<0.2
60
32
41
15
33
<1
58
25
3
<1
2
<1
87
17
AB-9D
American Assay
MS-15
51-51.2
8
<0.2
1 206
1 54
45
9
1 106
1 <1
1 392
1 16
1 5
<1
1
<1
1 69
1 19
AB-4D
American Assay
MS-16
79.8-80
2
<0.2
118
18
1 4
22_4
65
1
17
32
2
<1
2
<1
80
8
GWA-2D
American Assay
MS-18
84.5-84.8
4
<0.2
261
16
11
19
120
1
5
53
2
1 <1
1
<1
73
24
Notes:
ft bgs = feet below ground surface
ppm = parts per million
Marshall Steam Station
Source: HDR, Comprehensive Site Assessment Report Marshall Steam Station Ash Basin, September 8, 2015. Page 1 of 1

Table 6-8. Petrographic Analysis Summary
Boring ID
Petrography By
Sample ID
Sample Depth
Mineral Percentage by Volume'
Rock Type
Quartz
Plagioclase
Alkali Feldspar
Hornblende
Pyroxene
Biotite
Chlorite
Epidote
Sericite
(Muscovite)
Tremolite
Apatite
Allanite
Sphene
Pyrite
Zircon
AL-3D
HDR
M-AL-3D-1
186.4' TO 186.85'
18
35
25
3
-
15
-
-
tr'
-
tr
3
1
-
tr
Biotite Granite
AB-6D
HDR
M-AB-6D-1
64.0'to 64.3'
5
40
-
20
5
15
10
1
1
2
tr
-
-
-
tr
Meta-Andesite
AB-7D
HDR
M-AB-7D-1
89.0'to89.4'
20
30
-
15
-
25
tr
2
1
-
tr
-
-
6
tr
Meta-Dacite
AB-9D
HDR
M-AB-9D-1
51.2'to51.6'
10
30
5
5
-
35
Tr
1
113
-
Tr
-
-
2
tr
Meta-Andesite
AB-4D
HDR
M-AB-4D-1
79.6'to79.8'
5
55
1 tr
20
-
15
1
3
1
-
tr
-
tr
tr
tr
Meta -Diorite
GWA-2D
HDR
M-GWA-2D-1
885to89.0'
15
30
20
-
-
25
tr
3
tr
-
tr
5
tr
1
tr
Meta -Granite
Vercent Mineralogy estimated using Comparison Charts for Estimating Percentage Composition. All estimates are approximate.
2tr - Trace Amounts.
3-10% Coarse Muscovite.
Quartz- SiO2
Plagioclase Feldspar: NaAISi3O6 - CaAI2Si2O6
Biotite: K(Mg,Fe)3AISi3Oj6(OH)2
Pyrite: FeS2
Apatite: Ca5(PO4)3(F,CI,OH)
Zircon: ZrSiO,
Sericite: K2AI4[Si3AI01o]2(OH)2
Chlorite: (Mg,Fe)3(Si,AI)4Oj6(OH) 2 (Mg,Fe)3(OH)6
Epidote: Ca2Al2(Fe31;Al)(SiO4)(Si2O7)0(OH)
Pyroxene (augite): (Ca,Na)(Mg,Fe,AI,Ti)(Si,AI)2O6
Pyroxene (diopside): MgCa&2O6
Marshall Steam Station
Source: HDR, Comprehensive Site Assessment Report Marshall Steam Station Ash Basin, September 8, 2015. Page 1 of 1

TABLE 6-9
HISTORIC WATER LEVEL DATA
MARSHALL STEAM STATION
DUKE ENERGY CAROLINAS, LLC, TERRELL, NC
Water Level (Feet)
Screened Interval
(Feet, BGS)
Monitoring Zone
Well
7/22/2015
9/28/2015
6/22/2016
3/10/2017
6/12/2017
6/14/2017
9/22/2017
AB-10BR
---
---
---
790.60
790.25
---
790.14
120
125
Bedrock
AB-10D
789.04
789.08
789.95
790.59
790.12
---
790.00
71
76
Deep
AB-10S
789.16
789.10
790.84
791.92
790.98
---
790.53
9
24
Shallow
AB-10SL
788.98
788.97
790.17
790.90
790.25
---
790.10
40
50
Shallow
AB-11D
795.10
793.69
797.13
795.89
794.24
---
795.09
77
82
Deep
AB-11S
793.18
792.70
795.71
795.30
795.16
---
794.60
6
16
Shallow
AB-12BR
---
---
---
794.15
794.13
---
793.84
101
106
Bedrock
AB-12D
790.85
791.09
791.52
791.11
791.02
---
791.03
62
67
Deep
AB-12S
790.76
790.48
790.29
790.22
789.97
---
790.07
3
13
Shallow
AB-12SL
790.56
790.96
790.61
790.43
789.27
---
790.35
40
50
Shallow
AB-13D
797.67
797.10
798.30
797.86
798.24
---
797.64
81
86
Deep
AB-13S
797.30
796.63
798.77
797.82
797.51
---
801.51
15
30
Shallow
AB-14D
809.46
808.04
810.81
808.41
811.40
---
809.65
80
85
Deep
AB-14S
808.65
807.17
812.80
809.45
810.60
---
808.82
6
21
Shallow
AB-15BR
804.03
804.62
807.40
807.10
806.55
---
806.86
107
112
Bedrock
AB-15D
802.75
801.56
803.52
803.39
803.88
---
803.38
64
69
Deep
AB-15S
804.25
802.86
804.56
805.17
805.79
---
804.10
5
20
Shallow
AB-15SL
800.82
800.12
801.41
801.55
801.92
---
801.54
40
50
Shallow
AB-16D
813.95
811.89
816.42
815.72
815.38
---
815.13
41
46
Deep
AB-16S
814.26
811.64
816.33
816.18
816.51
---
815.96
3
13
Shallow
AB-17D
818.96
818.10
819.51
820.00
820.37
---
819.96
106
111
Deep
AB-17S
818.41
817.72
818.79
819.22
819.59
---
819.33
6
21
Shallow
AB-18D
817.91
817.50
817.85
818.40
817.67
---
818.77
72
77
Deep
AB-18S
817.69
817.36
817.61
817.99
818.55
---
818.64
3
13
Shallow
AB-1BR
771.16
772.96
774.25
773.74
774.48
---
774.21
119
124
Bedrock
AB-1D
770.08
769.44
770.69
770.48
771.31
---
771.10
91
96
Deep
AB-1S
767.10
766.76
767.87
767.59
768.37
---
768.02
6
20
Shallow
AB-20D
827.48
827.40
826.64
826.64
826.20
---
826.24
139
144
Deep
AB-20S
829.36
828.98
828.67
828.68
828.22
---
828.15
54
69
Shallow
AB-21D
792.37
792.48
793.19
793.05
792.90
---
792.78
60
65
Deep
AB-21S
791.30
791.12
791.78
791.61
791.58
---
791.36
13
28
Shallow
AB-2D
766.60
765.49
768.10
766.62
768.12
---
767.15
91
96
Deep
AB-2S
760.71
759.53
763.30
759.88
761.91
---
761.16
17
32
Shallow
AB-3D
797.18
796.95
797.45
796.48
796.06
---
795.17
130
135
Deep
AB-3S
798.46
797.79
798.32
797.12
796.62
---
795.67
8
24
Shallow
AB-4D
799.54
793.84
794.12
793.65
793.38
---
792.80
72
77
Deep
AB-4S
799.61
799.73
799.41
798.55
798.50
---
797.62
6
21
Shallow
AB-4SL
799.36
799.35
799.15
798.35
798.17
---
797.25
39
49
Shallow
P:\Duke Energy Carolinas\18. MARSHALL\CSA Update January 2018\Final\Tables\Table 6-9 Historical Water Level Page 1 of 4

TABLE 6-9
HISTORIC WATER LEVEL DATA
MARSHALL STEAM STATION
DUKE ENERGY CAROLINAS, LLC, TERRELL, NC
Water Level (Feet)
Screened Interval
(Feet, BGS)
Monitoring Zone
Well
7/22/2015
9/28/2015
6/22/2016
3/10/2017
6/12/2017
6/14/2017
9/22/2017
AB-5BR
799.25
799.60
799.25
799.05
799.10
---
798.86
105
110
Bedrock
AB-5D
799.34
800.27
799.85
799.58
799.56
---
799.36
78
83
Deep
AB-5S
799.50
800.29
799.92
799.52
799.63
---
799.39
3
18
Shallow
AB-6BR
817.10
815.67
820.11
817.88
---
---
---
105
110
Bedrock
AB-6BRA
---
---
---
---
818.18
---
816.64
---
---
Bedrock
AB-6D
817.86
816.43
820.87
818.56
819.69
---
818.09
63
68
Deep
AB-6S
819.80
818.43
823.07
820.21
821.38
---
820.16
7
22
Shallow
AB-7D
813.33
811.85
816.33
814.37
815.39
---
813.58
79
84
Deep
AB-7S
814.10
812.32
817.45
815.41
816.86
---
815.18
5
20
Shallow
AB-8D
764.40
791.99
792.12
791.46
791.21
---
790.90
95
100
Deep
AB-8S
766.14
792.04
791.74
790.92
789.67
---
791.02
3
13
Shallow
AB-9BR
790.62
790.59
789.91
790.60
789.37
---
790.41
78
83
Bedrock
AB-9D
789.34
789.32
789.89
789.84
788.61
---
789.58
48
53
Deep
AB-9S
789.78
789.73
790.53
790.27
790.11
---
790.09
3
10
Shallow
AL-1BR
---
---
---
776.78
777.28
---
776.50
122
127
Bedrock
AL-1D
773.91
773.70
---
774.31
774.36
---
774.23
80
85
Deep
AL-1S
778.74
778.45
---
779.31
779.45
---
779.31
32
47
Shallow
AL-2BR
801.31
800.92
801.74
801.23
800.87
---
800.68
204
209
Bedrock
AL-2BRL
---
---
---
796.99
797.72
---
796.82
---
---
Bedrock
AL-2D
798.99
798.70
799.50
799.19
798.86
---
798.73
152
157
Deep
AL-2S
797.22
796.94
797.69
797.57
797.26
---
797.19
112
128
Shallow
AL-3BR
---
---
---
803.80
803.69
---
803.22
229
234
Bedrock
AL-3D
802.33
801.41
803.28
803.01
802.84
---
802.35
179
184
Deep
AL-3S
802.84
801.98
803.94
804.03
803.79
---
793.28
97
118
Shallow
AL-4BR
---
---
---
810.27
809.80
---
809.06
179
184
Bedrock
AL-4D
810.09
809.75
810.16
810.31
809.84
---
809.41
148
153
Deep
BG-1BR
---
---
799.68
---
---
---
---
84
89
Bedrock
BG-1D
802.42
801.47
804.87
797.73
773.74
---
803.31
35
40
Deep
BG-1S
805.10
801.97
805.20
805.66
807.07
---
806.62
5
15
Shallow
BG-2BR
807.21
806.38
808.85
807.57
807.84
---
807.43
50
55
Bedrock
BG-2S
811.33
807.28
809.03
809.06
809.31
---
809.27
6
16
Shallow
BG-3BR
---
---
833.07
829.10
831.13
---
830.79
105
110
Bedrock
BG-3D
836.20
833.73
837.77
832.72
1 835.30
---
835.10
59
1 64
1 Deep
BG-3S
833.39
831.21
836.12
831.28
833.85
---
833.00
22
32
Shallow
GWA-10D
---
---
---
767.48
767.50
---
767.25
114
118
Deep
P:\Duke Energy Carolinas\18. MARSHALL\CSA Update January 2018\Final\Tables\Table 6-9 Historical Water Level Page 2 of 4

TABLE 6-9
HISTORIC WATER LEVEL DATA
MARSHALL STEAM STATION
DUKE ENERGY CAROLINAS, LLC, TERRELL, NC
Water Level (Feet)
Screened Interval
(Feet, BGS)
Monitoring Zone
Well
7/22/2015
9/28/2015
6/22/2016
3/10/2017
6/12/2017
6/14/2017
9/22/2017
GWA-10S
---
---
---
764.60
764.62
---
764.17
5
20
Shallow
GWA-11BR
---
---
---
---
764.08
---
762.98
150
155
Bedrock
GWA-11D
---
---
764.25
762.94
764.39
---
763.36
110
115
Deep
GWA-11S
---
---
766.64
765.60
766.61
---
765.68
40
55
Shallow
GWA-12BR
---
---
---
857.81
859.12
---
857.60
113
118
Bedrock
GWA-12D
---
---
---
858.59
859.99
---
857.11
88
93
Deep
GWA-12S
---
---
---
870.33
871.75
---
869.71
10
25
Shallow
GWA-13D
---
---
---
860.01
860.86
---
---
134
139
Deep
GWA-13S
---
---
---
866.61
868.10
---
865.70
15
30
Shallow
GWA-14D
---
---
---
---
---
867.98
867.44
105
110
Deep
GWA-14S
---
---
---
---
---
868.04
867.59
35
50
Shallow
GWA-15S
---
---
---
---
758.57
---
756.67
21
36
Shallow
GWA-1BR
764.34
763.68
765.15
763.88
764.78
---
764.80
152
156
Bedrock
GWA-1D
760.78
760.92
762.49
761.32
762.74
---
762.26
119
124
Deep
GWA-1S
760.84
759.71
761.86
760.17
762.01
---
781.28
38
53
Shallow
GWA-2D
802.72
801.29
805.46
803.27
---
---
---
78
83
Deep
GWA-2DA
---
---
---
---
804.26
---
803.25
94
99
Deep
GWA-2S
803.12
801.65
805.83
803.63
804.80
---
803.39
14
30
Shallow
GWA-3D
832.80
832.66
833.29
833.00
832.95
---
832.81
36
41
Deep
GWA-3S
830.09
829.99
830.37
830.30
830.31
---
830.21
3
13
Shallow
GWA-4D
840.34
839.87
841.66
841.15
840.70
---
840.29
81
86
Deep
GWA-4S
843.57
842.89
844.09
843.78
843.26
---
842.91
49
64
Shallow
GWA-5D
812.79
812.23
813.39
811.09
810.84
---
810.53
44
49
Deep
GWA-5S
812.57
811.94
813.23
below pump
below pump
---
---
25
35
Shallow
GWA-6D
802.70
801.47
804.00
802.23
802.38
---
801.41
102
107
Deep
GWA-6S
802.94
801.69
804.22
802.38
802.56
---
801.57
38
48
Shallow
GWA-7D
799.99
798.45
803.58
800.51
801.80
---
800.95
26
31
Deep
GWA-7S
797.02
795.24
801.01
798.05
799.27
---
798.26
9
19
Shallow
GWA-8D
817.58
816.20
818.80
816.20
816.39
---
815.78
56
61
Deep
GWA-8S
818.71
817.45
819.75
817.37
817.31
---
816.94
23
38
Shallow
GWA-9BR
846.38
845.00
847.85
846.90
847.25
---
839.03
84
89
Bedrock
MS-10
dry
---
---
832.61
833.91
---
---
13
23
Shallow
MS-11
---
---
---
825.38
825.88
---
824.40
33
43
Shallow
MS-12
---
---
818.59
811.53
812.66
---
811.31
21
31
Shallow
MS-14
---
---
---
806.84
807.29
---
805.37
34
44
Shallow
MS-15
---
---
---
808.73
808.84
---
807.53
53
63
Shallow
MS-16
---
---
---
811.17
811.40
---
810.47
27
37
Deep
MS-8
---
---
---
826.63
826.94
---
826.17
20
30
Shallow
P:\Duke Energy Carolinas\18. MARSHALL\CSA Update January 2018\Final\Tables\Table 6-9 Historical Water Level Page 3 of 4

TABLE 6-9
HISTORIC WATER LEVEL DATA
MARSHALL STEAM STATION
DUKE ENERGY CAROLINAS, LLC, TERRELL, NC
Water Level (Feet)
Screened Interval
(Feet, BGS)
Monitoring Zone
Well
7/22/2015
9/28/2015
6/22/2016
3/10/2017
6/12/2017
6/14/2017
9/22/2017
MW-10D
755.24
---
---
754.48
757.86
---
755.78
82
87
Deep
MW-10S
754.75
---
---
757.18
757.55
---
755.50
14
29
Shallow
MW-11D
840.13
---
---
840.45
840.76
---
840.26
88
93
Deep
MW-11S
840.12
---
---
840.38
840.57
---
840.25
39
54
Shallow
MW-12D
855.19
---
---
857.42
858.57
---
855.31
93
98
Deep
MW-12S
855.46
---
---
859.08
859.84
---
855.50
10
25
Shallow
MW-13D
843.06
---
---
843.53
843.80
---
842.85
44
49
Deep
MW-13S
841.36
---
---
841.92
842.15
---
841.30
6
21
Shallow
MW-14BR
773.60
773.18
774.75
774.24
774.24
---
773.89
99
104
Bedrock
MW-14D
772.61
770.61
---
773.31
773.47
---
772.94
58
63
Deep
MW-14S
773.06
771.99
---
773.67
773.85
---
773.31
32
47
Shallow
MW-3
---
---
---
804.68
804.54
---
804.15
16
26
Shallow
MW-4
829.99
---
---
828.74
829.23
---
828.60
37
47
Shallow
MW-4D
829.10
832.01
830.39
828.39
829.03
---
828.50
56
61
Deep
MW-5
---
826.73
---
842.28
842.50
---
840.84
18
28
Shallow
MW-6
---
---
830.73
---
---
---
---
---
---
---
MW-6D
769.00
768.47
770.59
772.60
773.95
---
773.62
83
88
Deep
MW-6S
766.31
765.82
767.96
769.86
771.45
---
770.90
15
25
Shallow
MW-7
---
---
---
813.55
813.18
---
812.91
---
---
---
MW-7D
768.76
768.03
769.87
769.24
770.21
---
769.83
61
66
Deep
MW-7S
761.59
760.74
762.64
761.79
763.05
---
762.18
11
21
Shallow
MW-8D
759.11
757.48
760.79
760.00
761.30
---
759.68
93
98
Deep
MW-8S
757.09
755.28
758.84
757.08
759.59
---
757.72
17
27
Shallow
MW-9D
758.16
756.30
759.93
757.58
760.47
---
758.69
90
95
Deep
MW-9S
759.41
757.19
761.79
759.64
761.36
---
760.75
21
31
Shallow
OB-1 (Ash Basin)
779.43
---
---
778.89
779.99
---
---
40
56
Shallow
OB-1 (Dry Ash Landfill)
---
---
---
801.81
802.02
---
---
53
63
Shallow
OB-2 (MW-6)
---
---
---
103
118
Shallow
OB-3 (MW-7)
---
---
812.03
1 ---
I ---
---
---
39
54
Shallow
Notes
BGS - Below ground surface
Prepared by: CAG Checked by: DMY
P:\Duke Energy Carolinas\18. MARSHALL\CSA Update January 2018\Final\Tables\Table 6-9 Historical Water Level Page 4 of 4

TABLE 6-10
HORIZONTAL GROUNDWATER GRADIENTS AND VELOCITIES
MARSHALL STEAM STATION
DUKE ENERGY CAROLINAS, LLC, TERRELL, NC
Direction
Data Points
Gradient
(ft per ft)
Velocity
(ft per yr)
Ash
SE
AB-14S to AB-8S
0.012
31.52
SE
AB-15S to AB-12S
0.008
21.75
E
AB-5S to AB-3S
0.003
8.37
SE
AB-7S to AB-21S
0.012
33.87
Shallow
E
GWA-2S to GWA-1S
0.010
22.36
SE
AL-2S to AL-1S
0.007
15.60
S
AL-1S to MW-6S
0.007
15.54
SE
AB-11S to MW-14S
0.013
29.58
S
MW-6S to MW-10S
0.016
36.42
Deep
SE
AB-3D to GWA-1D
0.022
129.43
E/NE
AB-6D to AB-21D
0.012
70.25
SW
GWA-6D to AB-11D
0.005
27.51
SE
AB-16D to AB-12D
0.011
64.42
SE
GWA-4D to AB-13D
0.014
79.84
SE
AL-4D to AB-10D
0.012
67.76
Bedrock
SE
AB-5BR to GWA-1BR
0.014
87.08
SE
AB-15BR to AB-9BR
0.007
42.03
SE
GWA-9BR to AB-9BR
0.009
59.33
Prepared by: BDW Checked by: DMY
Notes•
ft = feet
yr = year
1. Water level measurements used for these calculations were collected on September 22, 2017
2. Geomean of hydraulic conductivities taken from Table 6-11 for each flow zone
3. Mean effective porosity each flow zone taken from 2015 CSA, Table 11-8 (HDR, Inc) and CAP
Part 2, Appendix A. Table 11-11
P:\Duke Energy Carolinas\18. MARSHALL\CSA Update January 2018\Final\Tables\
Table 6-10 Horizontal Groundwater Gradients and Velocities Page 1 of 1

TABLE 6-11
VERTICAL HYDRAULIC GRADIENTS
MARSHALL STEAM STATION
DUKE ENERGY CAROLINAS, LLC, TERRELL, NC
Well ID
Potential Vertical
Gradient
(ft per ft)
Flow Direction
Shallow to Deep
AB-1S to AB-11)
-0.0383
Upward
AB-2S to AB-21)
-0.0867
Upward
AB-3S to AB-31)
0.0043
Downward
AB-4SL to AB-4D
0.0794
Downward
AB-5S to AB-51)
0.0004
Downward
AB-6S to AB-61)
0.0411
Downward
AB-7S to AB-71)
0.0232
Downward
AB-8S to AB-81)
0.0014
Downward
AB-9S to AB-91)
0.0119
Downward
AB-10S to AB-10SL
0.0151
Downward
AB-10SL to AB-10D
0.0035
Downward
AB-11S to AB-11D
-0.0072
Upward
AB-12S to AB-12D
-0.0168
Upward
AB-12S to AB-12SL
-0.0074
Upward
AB-12SL to AB-12D
-0.0346
Upward
AB-13S to AB-13D
0.0636
Downward
AB-14S to AB-14D
-0.0118
Upward
AB-15S to AB-15SL
0.0786
Downward
AB-15SL to AB-15D
-0.0865
Upward
AB-16S to AB-16D
0.0238
Downward
AB-17S to AB-17D
-0.0067
Upward
AB-18S to AB-18D
-0.0019
Upward
AB-20S to AB-20D
0.0237
Downward
AB-21S to AB-21D
-0.0336
Upward
AL-1S to AL-11)
0.1182
Downward
AL-2S to AL-21)
-0.0448
Upward
AL-3S to AL-31)
-0.1233
Upward
BG-1S to BG-1D
0.1324
Downward
BG-2S to BG-2BR
0.0455
Downward
BG-3S to BG-3D
-0.0629
Upward
GWA-1S to GWA-11)
-0.0275
Upward
GWA-2S to GWA-2DA
0.0023
Downward
GWA-3S to GWA-3 D
-0.0854
Upward
GWA-4S to GWA-41)
0.0186
Downward
GWA-6S to GWA-61)
0.0024
Downward
GWA-7S to GWA-71)
-0.2196
Upward
GWA-8S to GWA-81)
0.0427
Downward
GWA-10S to GWA-10D
-0.0298
Upward
GWA-11S to GWA-11D
0.0350
Downward
GWA-12S to GWA-12D
0.0066
Downward
GWA-13S to GWA-13DA
0.0552
Downward
GWA-14S to GWA-14D
0.0024
Downward
Deep to Bedrock
AB-1D to AB-1BR
-0.1116
Upward
AB-1BR to AB-1BRL
0.0863
Downward
AB-51) to AB-5BR
0.0185
Downward
AB-61) to AB-6BRA
0.0050
Downward
AB-91) to AB-9BR
-0.0279
Upward
AB-10D to Ab-10BR
-0.0029
Upward
AB-12D to AB-12BR
-0.0731
Upward
AB-15D to AB-15BR
-0.0805
Upward
AL-11) to AL-1BR
-0.0534
Upward
AL-21) to AL-2BR
-0.0378
Upward
AL-2BR to AL-2BRL
0.0252
Downward
AL-31) to AL-3BR
-0.0174
Upward
AL-41) to AL-4BR
-0.0279
Upward
BG-11) to BG-1BR
0.0292
Downward
BG-31) to BG-3BR
0.1008
Downward
GWA-11) to GWA-1BR
-0.0779
Upward
GWA-12D to GWA-12BR
0.4499
Downward
Prepared By: ENK Checked By: BDW
Notes:
Water levels were collected by Pace Analytical on September 22, 2017.
P:\Duke Energy Carolinas\18. MARSHALL\CSA Update January 2018\Final\Tables\Table 6-11 Vertical Gradient Page 1 of 1

Table 6-12. Hydrostratigraphic Layer Properties - Horizontal Hydraulic Conductivity
Hydrostratigraphic Unit
N
Geometric Mean (cm/sec)
Geometric Mean + 1SD
(cm/sec)
Geometric Mean -1SD
(cm/sec)
Geometric Median
(cm/sec)
Minimum cm/sec
Maximum cm/sec
Ash
17
2.9E-04
4.5E-03
1.9E-05
3.5E-04
2.5E-06
4.3E-02
Fill
14
0.000048
0.00017
0.000013
0.000064
0.0000054
0.00039
Alluvium S
10
0.00049
0.0052
0.000046
0.001
0.0000082
0.026
M 1
31
0.00078
0.0038
0.00016
0.00053
0.0001
0.026
M2
22
0.000071
0.00053
0.0000095
0.000099
0.0000015
0.0023
Transition Zone TZ
12
0.00052
0.0031
0.000085
0.00069
0.000034
0.0058
Bedrock BR
54
0.00024
0.0012
0.00005
0.00029
0.0000076
0.0056
Notes: 1. Hydraulic Conductivity, %' values have an approximate lognormal distribution. Geometric mean, median, and standard deviation estimated by taking the log of the values and
running standard statistics on the log values, then converting those values back. 2. Dataset derived from CSA Investigation and historical reports. Refer to tables 11-4 and 11-6 for
historic conductivity data. 3. Fill dataset derived from CSA Investigation Sites Allen (N=5), Cliffside (N=4), Dan River (N=2), and Riverbend (N= 3) 4. Alluvium dataset derived from
Riverbend CSA investigation (N=3), Allen (N=2), Cliffside (N=3), and Dan River (N=2).
Marshall Steam Station
Source: HDR, Comprehensive Site Assessment Report Marshall Steam Station Ash Basin, September 8, 2015. Page 1 of 1

Table 6-13. Hydrostratigraphic Layer Properties - Vertical Hydraulic Conductivity
Hyd rostrati graph i c Unit
N
Geometric Mean
(cm/sec)
Geometric Mean
+ 1SD (cm/sec)
Geometric Mean
- 1SD (cm/sec)
Geometric
Median (cm/sec)
Minimum
(cm/sec)
Maximum
(cm/sec)
Ash
5
6.7E-05
2.9E-04
1.6E-05
5.6E-05
1.2E-05
5.6E-04
Fill
5
6.1 E-05
2.5E-04
1.5E-05
5.9E-05
1.6E-05
4.8E-04
Alluvium (S)
12
8.7E-06
4.6E-04
1.7E-07
8.1 E-06
4.6E-08
1.5E-02
M1
17
2.2E-05
2.2E-04
2.2E-06
4.8E-05
6.2E-07
4.1 E-04
M2
6
1.0E-04
5.5E-04
1.9E-05
7.8E-05
1.5E-05
1.6E-03
Transition Zone (TZ)
1 0
1-
-
-
-
-
-
Bedrock (BR)
1 0
1-
-
-
-
-I
-
Notes:
1. Hydraulic Conductivity, `k,' values have an approximate lognormal distribution. Geometric mean, median, and standard deviation
estimated by taking the log of the values and running standard statistics on the log values, then converting those values back.
2. Dataset derived from CSA Investigation and historical reports. Refer to tables 11-6 for historic conductivity data.
3. Vertical hydraulic conductivity values for the TZ and BR could not be measured in the field or laboratory. Vertical
and horizontal conductivity for these layers are unlikely to be equal. Consider to be equal as an initial assumption and adjust as
necessary during flow model calibration
3. Alluvium dataset derived from Allen (N=4), Belews (N=1), Cliffside (N=3), and Dan River (N=4) CSA Investigations.
Marshall Steam Station
Source: HDR, Comprehensive Site Assessment Report Marshall Steam Station Ash Basin, September 8, 2015. Page 1 of 1

Table 6-14. Historic Slug Test Permeability Results
Borehole
Category of Test
Depth 1 of Test (ft
bgs)
Depth 2 of Test (ft bgs)
Horizontal Hydraulic
Conductivity, V (cm/sec)
Hydrostratigraphic
Layer
B-3
Historic Slug
49
56
1.77E-04
M1
B-4
Historic Slug
52
59
1.57E-04
M1
B-6
Historic Slug
43
47
1.56E-04
M1
B-7
Historic Slug
47
61
2.14E-05
M2
MS-2
Historic Slug
21
30
2.26E-04
M1 / M2
MS-4
Historic Slug
39
46
5.55E-04
M1 / M2
MS-5
Historic Slug
32
38
4.56E-04
M1
MS-6
Historic Slug
27
38
1.04E-04
M1
MS-7
Historic Slug
20
26
3.07E-04
M1
MS-8
Historic Slug
27
30
1.93E-04
M1
MS-10
Historic Slug
12
20
1.42E-04
M1
MS-11
Historic Slug
27
39
1.79E-04
M1
OW-1
Historic Slug
20
26
5.78E-04
M1
OW-2
Historic Slug
18
26
3.65E-04
M1
OW-3
Historic Slug
18
27
7.19E-04
M1
MW-4S
Historic Slug
39
49
3.70E-04
M1 / M2
MW-4D
Historic Slug
56
61
4.02E-04
BR
MW-6S
Historic Slug
11
21
2.62E-02
M1
MW-6D
Historic Slug
79
84
1.18E-04
M2
MW-7S
Historic Slug
7
17
1.21E-02
M1
MW-7D
Historic Slug
58
63
1.31E-03
BR
MW-8S
Historic Slug
13
23
1.13E-03
M1 / M2
MW-8D
Historic Slug
89
94
7.20E-04
BR
MW-9S
Historic Slug
17
27
9.51E-04
M1
MW-9D
Historic Slug
87
92
5.64E-04
TZ / BR
MW-10S
Historic Slug
12
27
7.50E-04
M1
MW-10D
Historic Slug
81
86
1.13E-04
M2
MW-11S
Historic Slug
37
52
1.54E-03
M1
MW-11D
Historic Slug
86
91
3.43E-05
TZ
MW-12S
Historic Slug
7
22
1.56E-03
M1
MW-12D
Historic Slug
90
95
1.34E-04
M2
MW-13S
Historic Slug
3
18
2.40E-04
M1
MW-13D
Historic Slug
42
47
7.92E-04
TZ
MW-14S
Historic Slug
28
49
9.57E-04
M1 / M2
MW-14D
Historic Slug
55
60
6.02E-04
TZ
Notes:
1. Refer to Appendix H for historic slug test reports.
2. Historic boring logs (Appendix H) were used in the hydrostratigraphic characterization of screen intervals.
3. Historic slug test results in which test interval bridges hydrostratigraphic layers were not used in the statistical analysis.
References:
1. Hydrogeologic Study. Developed by S&ME, dated August 29, 2003. S&ME Project No. 1264-02-578
2. Ash Basin Monitoring Well Installation Report. Developed by S&ME, dated December 4, 2006. S&ME Project No. 1356-06-834
3. Ash Basin Monitoring Well Installation Report. Developed by MACTEC, dated January 31, 2010. MACTEC Project No. 6228-10-5284
Marshall Steam Station
Source: HDR, Comprehensive Site Assessment Report Marshall Steam Station Ash Basin, September 8, 2015. Page 1 of 1

TABLE 6-15
IN -SITU HYDRAULIC CONDUCTIVITY RESULTS
MARSHALL STEAM STATION
DUKE ENERGY CAROLINAS, LLC, TERRELL, NC
Ash Pore Water
Well ID
Slug
Test
Slug Test
Number
Hydraulic Conductivity
(cm/sec)
Hydraulic Conductivity
(ft/day)
Measured
Geometric
Mean
Measured
Geometric
Mean _j
AB-3S
Slug Out
Test 2
2.12E-03
--
6.01E+00
--
AB-4S
Slug Out
Test 2
3.72E-04
--
1.05E+00
--
AB-4SL
Slug In
Test 1
3.75E-05
3.73E-05
1.06E-01
1.06E-01
SlugOut
Test 2
3.71E-05
1.05E-01
AB-5S
Slug Out
Test 2
1.40E-05
--
3.96E-02
1
AB-6S
Slug In
Test 1
9.46E-05
1.14E-04
2.68E-01
3.24E-01
SlugOut
Test 2
1.38E-04
3.91E-01
AB-8S
Slug In
Test 1
7.03E-02
5.52E-02
1.99E+02
1.57E+02
Slug -Out
Test 2
4.34E-02
1.23E+02
AB-10SL
Slug In
Test 1
2.44E-04
2,60E-04
6.92E-01
7,37E-01
SlugOut
Test 2
2.77E-04
7.85E-01
AB-10S
Slug Out
Test 2
4.29E-04
--
1.22E+00
--
AB-12S
Sluq In
Test 1
1.93E-02
2,31E-02
5.47E+01
6.55E+01
SlugOut
Test 2
2.77E-02
7.85E+01
AB-12SL
Sluq In
Test 1
4.32E-04
4.77E-04
1.22E+00
1.35E+00
SlugOut
Test 2
5.27E-04
1.49E+00
AB-13S
Slug In
Test 1
6.72E-05
6.15E-05
1.90E-01
1.74E-01
SlugOut
Test 2
5.63E-05
1.60E-01
AB-14S
Slug -In
Test 1
3.33E-02
--
9.45E+01
AB-15S
Slug Out
Test 2
7.81E-04
--
2.21E+00
--
AB-15SL
Sluq In
Test 1
5.27E-04
5.26E-04
1.49E+00
1.49E+00
SlugOut
Test 2
5.25E-04
1.49E+00
AB-17S
Slug Out
Test 2
7.66E-04
--
2.17E+00
--
AB-18S
Slug -In
Test 1
1.46E-02
--
4.14E+01
--
AB-20S
Slug -In
Test 1
2.48E-06
--
7.03E-03
--
AL-3S
Slug In
Test 1
1.05E-04
7,81E-05
2.97E-01
2,21E-01
SlugOut
Test 2
5.83E-05
1.65E-01
GEOMETRIC MEAN
5.05E-04
1.43E+00
HIGHEST CONDUCTIVITY
7.03E-02
1.99E+02
LOWEST CONDUCTIVITY
2.48E-06
7.03E-03
Prepared by: RAG Checked by: DMY
Notes:
Slug tests were analyzed using the Bouwer-Rice mathmatical model, unless where indicated.
cm/sec - centimeter per second
ft/day - feet per day
-- No statistics necessary, when only one slug test analyzed
P:\Duke Energy Carolinas\18. MARSHALL\CSA Update January 2018\Final\Tables\Table 6-15 In -Situ Hydraulic
ConductivitiesSummary Results by Unit
Page 1 of 6

TABLE 6-15
IN -SITU HYDRAULIC CONDUCTIVITY RESULTS
MARSHALL STEAM STATION
DUKE ENERGY CAROLINAS, LLC, TERRELL, NC
Saprolite
Well ID
Slug
Test
Slug Test
Number
Hydraulic Conductivity
(cm sec)
Hydraulic Conductivity
ft/da
Measured
Geometric
Mean
Measured
Geometric
I Mean I
AB-1S
Sluq In
Test 1
2.20E-05
2.27E-05
6.23E-02
6.44E-02
SlugOut
Test 2
2.34E-05
6.64E-02
AB-2S
Slug In
Test 1
4.92E-05
5.53E-05
1.39E-01
1.57E-01
Slug Out
Test 2
6.22E-05
1.76E-01
AB-9S
Slug Out
Test 2
4.96E-05
--
1.41E-01
I --
AB-11S
Slug In
Test 1
1.55E-04
1.86E-04
4.38E-01
5.26E-01
Slu Out
Test 2
2.23E-04
6.31E-01
AB-16S
Slug Out
Test 2
1.64E-05
--
4.63E-02
--
AL-1S
Slug In
Test 1
1.03E-03
2,10E-03
2.92E+00
5.95E+00
Slug Out
Test 2
4.29E-03
1.22E+01
AL-2S
Slug Out
Test 1
2.10E-04
--
5.94E-01
--
BG-2S
Slug In
Test 1
2.64E-05
6.37E-06
7.49E-02
1.81E-02
SlugOut
Test 2
1.53E-06
4.35E-03
BG-3S
Slug In
Test 1
2.64E-05
2,81E-05
7.47E-02
7,97E-02
SlugOut
Test 2
3.00E-05
8.51E-02
GWA-1S
Slug In
Test 1
7.81E-04
5.61E-04
2.21E+00
1.59E+00
Slug Out
Test 2
4.03E-04
1.14E+00
GWA-2S
Slug In
Test 1
1.46E-02
g 87E-03
4.15E+01
2,51E+01
Slug Out
Test 2
5.37E-03
1.52E+01
GWA-3S
Slug In
Test 1
4.84E-03
3.26E-03
1.37E+01
9.24E+00
Sluq Out
Test 2
2.20E-03
6.23E+00
GWA-4S
Slug In
Test 1
1.29E-03
1.08E-03
3.66E+00
3.07E+00
Slug Out
Test 2
9.11E-04
2.58E+00
GWA-6S
Slug In
Test 1
8.43E-03
4.45E-03
2.39E+01
1.26E+01
Slug Out
Test 2
2.35E-03
6.66E+00
GWA-7S
Slug In
Test 1
2.40E-02
7,15E-03
6.80E+01
2,03E+01
Slug Out
Test 2
2.13E-03
6.04E+00
GWA-8S
�Slug In
Test 1
3.63E-02
1.30E-01
1.03E+02
3.69E+02
Slug Out
Test 2
4.68E-01 I
F1.33E+03
P:\Duke Energy Carolinas\18. MARSHALL\CSA Update January 2018\Final\Tables\Table 6-15 In -Situ Hydraulic
ConductivitiesSummary Results by Unit
Page 2 of 6

TABLE 6-15
IN -SITU HYDRAULIC CONDUCTIVITY RESULTS
MARSHALL STEAM STATION
DUKE ENERGY CAROLINAS, LLC, TERRELL, NC
Sa rolite continued
Well ID
Slug
Test
Slug Test
Number
Hydraulic Conductivity
cm/sec
Hydraulic Conductivity
ft/da
Measured
Geometric
n
Measured
Geometric
Mean
GWA-10S
Slug In
Test 1
4.71E-05
--
1.33E-01
--
GWA-11S
Slug Out
Test 1
1.50E-04
--
4.25E-01
--
GWA-12S
Slug Out
Test 1
1.31E-04
--
3.71E-01
--
GWA-13S
Slug Out
Test 1
7.35E-05
--
2.08E-01
--
MW-4
Slug In
Test 1
1.30E-04
6.98E-05
3.68E-01
1.98E-01
SlugOut
Test 2
3.75E-05
1.06E-01
MW-7S
Slug Out
Test 1
4.83E-02
--
1.37E+02
--
OB-1
Slug In
Test 1
8.65E-04
6.75E-04
2.45E+00
1.91E+00
SlugOut
Test 2
5.26E-04
1.49E+00
GEOMETRIC MEAN
4.47E-04
1.27E+00
HIGHEST CONDUCTIVITY
4.68E-01
1.33E+03
LOWEST CONDUCTIVITY
1.53E-06
4.35E-03
Prepared by: RAG Checked by: DMY
Notes:
Slug tests were analyzed using the Bouwer-Rice mathmatical model, unless where indicated.
cm/sec - centimeter per second
ft/day - feet per day
-- No statistics necessary, when only one slug test analyzed
P:\Duke Energy Carolinas\18. MARSHALL\CSA Update January 2018\Final\Tables\Table 6-15 In -Situ Hydraulic
ConductivitiesSummary Results by Unit
Page 3 of 6

TABLE 6-15
IN -SITU HYDRAULIC CONDUCTIVITY RESULTS
MARSHALL STEAM STATION
DUKE ENERGY CAROLINAS, LLC, TERRELL, NC
Deep Zone
Well ID
I
Slug
Test
Slug Test
Number
Hydraulic Conductivity
cm/sec
Hydraulic Conductivity
ft/da
Measured
Geometric
Mean
Measured
Geometric
Mean I
AB-1D
Slug Out
Test 2
2.42E-04
--
6.85E-01
--
AB-2D
Slug In
Test 1
3.36E-03
3.40E-03
9.52E+00
9,63E+00
SlugOut
Test 2
3.44E-03
9.74E+00
AB-3D
Slug In
Test 1
1.10E-03
1.11E-03
3.11E+00
3.16E+00
Slug Out
Test 2
1.13E-03
3.21E+00
IF AB-4D
Slug In
Test 1
2.02E-03
2,01E-03
5.73E+00
5.71E+00
SlugOut
Test 2
2.00E-03
5.68E+00
AB-5D
Slug In
Test 1
7.76E-04
7,52E-04
2.20E+00
2,13E+00
SlugOut
Test 2
7.29E-04
2.07E+00
AB-6D
Slug In
Test 1
4.34E-04
2.46E-04
1.23E+00
6.96E-01
Slug Out
Test 2
1.39E-04
3.94E-01
AB-7D
Slug In
Test 1
1.03E-03
g 87E-04
2.93E+00
2,80E+00
Slug Out
Test 2
9.44E-04
2.67E+00
AB-8D
Slug In
Test 1
1.85E-04
1.36E-04
5.24E-01
3.86E-01
SlugOut
Test 2
1.00E-04
2.84E-01
AB-9D
Slug In
Test 1
1.33E-04
1.37E-04
3.76E-01
3.88E-01
Slug Out
Test 2
1.41E-04
4.01E-01
IFAB-10D
Slug In
Test 1
2.89E-03
3.05E-03
8.18E+00
8,65E+00
SlugOut
Test 2
3.23E-03
9.14E+00
AB-11D
Slug In
Test 1
2.62E-03
2.58E-03
7.43E+00
7.33E+00
Slu Out
Test 2
2.55E-03
7.23E+00
AB-12D
Slug In
Test 1
6.83E-07
9,75E-07
1.93E-03
2,76E-03
Slug Out
Test 2
1.39E-06
3.95E-03
IFAB-13D
Slug In
Test 1
5.49E-04
5.43E-04
1.56E+00
1.54E+00
SlugOut
Test 2
5.37E-04
1.52E+00
AB-14D
Slug In
Test 1
7.65E-04
--
2.17E+00
--
AB-15D
Slug In
Test 1
1.06E-03
1.25E-03
3.01E+00
3.53E+00
SlugOut
Test 2
1.47E-03
4.15E+00
AB-16D
Slug In
Test 1
3.57E-05
2.94E-05
1.01E-01
8.34E-0--l2
SlugOut
Test 2
2.43E-05
6.88E-02
AB-17D
Slug In
Test 1
5.95E-03
5.79E-03
1.69E+01
1.64E+01
SlugOut
Test 2
5.64E-03
1.60E+01
AB-18D
Slug In
Test 1
1.22E-02
1.16E-02
3.46E+01
3.27E+01
SlugOut
Test 2
1.09E-02
3.10E+01
AB-20D
Slug In
Test 1
3.59E-05
3.25E-05
1.02E-01
9.23E-02
SlugOut
Test 2
2.95E-05
8.37E-02
AB-21D
Slug In
Test 1
1.41E-03
2.14E-03
3.99E+00
6.07E+00
SlugOut
Test 2
3.26E-03
9,25E+00
AL-1D
Slug In
Test 1
2.15E-04
1.88E-04
6.10E-01
5.32E-01
SlugOut
Test 2
1.64E-04
4.64E-01
AL-2D
Slug In
Test 1
5.73E-04
5.15E-04H.31E+00
.62E+00
1.46E+00
SlugOut
Test 2
4.62E-04
P:\Duke Energy Carolinas\18. MARSHALL\CSA Update January 2018\Final\Tables\Table 6-15 In -Situ Hydraulic
ConductivitiesSummary Results by Unit
Page 4 of 6

TABLE 6-15
IN -SITU HYDRAULIC CONDUCTIVITY RESULTS
MARSHALL STEAM STATION
DUKE ENERGY CAROLINAS, LLC, TERRELL, NC
Deep Zone (continued)
Well ID
Slug
Test
Slug Test
Number
Hydraulic Conductivity
(cm sec)
Hydraulic Conductivity
ft/da
Measured
Geometric
Measured
Geometric
AL-31D
Sluq In
Test 1
2.90E-05
2,60E-05
8.22E 02
7.38E-02
SlugOut
Test 2
2.34E-05
6.62E-02
AL-41D
Slug In
Test 1
1.32E-03
1.30E-03
3.75E+00
3.68E+00
SlugOut
Test 2
1.28E-03
3.61E+00
BG-3D
Sluq In
Test 1
2.52E-03
2,65E-03
7.15E+00
7,52E+00
SlugOut
Test 2
2.79E-03
7.91E+00
GWA-11D
Sluq In
Test 1
5.12E-04
5.19E-04
1.45E+00
1.47E+00
SlugOut
Test 2
5.26E-04
1.49E+00
GWA-21D
Slug In
Test 1
1.37E-05
8,00E-06
3.89E-02
2.27E-02
SlugOut
Test 2
4.66E-06
1.32E-02
GWA-31D
Sluq In
Test 1
5.66E-03
5.85E-03
1.60E+01
1.66E+01
SlugOut
Test 2
6.04E-03
1.71E+01
GWA-41D
Slug Out
Test 1
2.73E-07
--
7.74E-04
--
GWA-5D
Slug In
slugOut
Test 1
1.24E-04
8,66E-05
3.51E-01
2,46E-01
Test 2
6.05E-05
1.72E-01
GWA-6D
Slug In
Test 1
6.21E-04
6.61E-04
1.76E+00
1.87E+00
SlugOut
Test 1
7.05E-04
2.00E+00
GWA-7D
Slug In
Test 1
3.14E-04
2,93E-04
8.91E-01
8,29E-01
SlugOut
Test 2
2.72E-04
7.72E-01
GWA-8D
Slug In
Test 1
3.54E-04
3.40E-04
1.00E+00
9,64E-01
SlugOut
Test 2
3.27E-04
9.26E-01
GWA-10D
Slug In
Test 1
6.69E-04
6.00E-04
1.90E+00
1.70E+00
SlugOut
Test 2
5.38E-04
1.53E+00
GWA-11D
Slug In
Test 1
1.23E-03
1.20E-03
3.49E+00
3.39E+00
Slu Out
Test 2
1.16E-03
3.29E+00
GWA-12D
Slug IU
Test 1
1.99E-03
1.71E-03
5.64E+00
4.85E+00
Slu Out
Test 2
1.47E-03
4.17E+00
MW-4D
Slug Out
Test 1
1.74E-04
--
4.94E-01
--
GEOMETRIC MEAN
4.23E-04
1.20E+00
HIGHEST CONDUCTIVITY
1.22E-02
3.46E+01
LOWEST CONDUCTIVITY
2.73E-07
7.74E-04
Prepared by: RAG Checked by: DMY
Notes:
Slug tests were analyzed using the Bouwer-Rice mathmatical model, unless where indicated.
cm/sec - centimeter per second
ft/day - feet per day
-- No statistics necessary, when only one slug test analyzed
P:\Duke Energy Carolinas\18. MARSHALL\CSA Update January 2018\Final\Tables\Table 6-15 In -Situ Hydraulic
ConductivitiesSummary Results by Unit
Page 5 of 6

TABLE 6-15
IN -SITU HYDRAULIC CONDUCTIVITY RESULTS
MARSHALL STEAM STATION
DUKE ENERGY CAROLINAS, LLC, TERRELL, NC
Bedrock
Well ID
I
Slug
Test
Slug Test
Number
Hydraulic Conductivity
(cm sec)
Hydraulic Conductivity
ft/da
Measured
Geometric
mean
Measured
Geometric
Mean
AB-1BR
Sluq In
Test 1
1.69E-03
1.65E-03
4.80E+00
4.68E+00
SlugOut
Test 2
1.61E-03
4.56E+00
AB-5BR
Slug In
Test 1
7.44E-05
7,21E-05
2.11E-01
2,04E-01
SlugOut
Test 2
6.99E-05
1.98E-01
AB-6BR
Slua In
Test 1
1.55E-04
1.90E-04
4.40E-01
5.38E-01
SlugOut
Test 2
2.32E-04
6.57E-01
AB-9BR
Sluq In
Test 1
4.44E-04
4.41E-04
1.26E+00
1.25E+00
SlugOut
Test 2
4.38E-04
1.24E+00
AB-15BR
Slug In
Test 1
2.00E-03
2,03E-03
5.68E+00
5.74E+00
SlugOut
Test 2
2.05E-03
5.81E+00
AL-2BR
Sluq In
Test 1
3.54E-05
3.23E-05
1.00E-01
9.17E-02
SlugOut
Test 2
2.95E-05
8.37E-02
BG-2BR
Slug In
Test 1
6.32E-05
4.26E-05
1.79E-01
1.21E-01
Slug Out
Test 2
2.88E-05
--]
8.15E-02
GWA-1BR
Slug In
Test 1
1.35E-02
1.22E-02
3.82E+01
3.46E+01
SlugOut
Test 2
1.10E-02
3.13E+01 d
GWA-9BR
Slug In
Test 1
3.81E-04
3.29E-04
1.08E+00
9.33E-01
SlugOut
Test 2
2.84E-04
8.06E-01
BG1BR
Slug In
Test 1
2.99E-05
2.72E-05
8.49E-02
7.72E-02
Slug Out
Test 2
2.48E-05
7.03E-02
BG3BR
Slug In
Test 1
6.09E-05
4.60E-05
1.73E-01
1.30E-01
Slug Out
Test 2
3.47E-05
--]
9.85E-02
GWA-12BR
Slug In
Test 1
5.64E-05
5.12E-05
1.60E-01
1.45E-01
Slug Out
Test 2
4.66E-05
1.32E-01
MW-14BR
Slug In
Test 1
2.87E-04
2.91E-04
8.13E-01
8.25E-01
SlugOut
Test 2
2.95E-04
8.36E-01
GEOMETRIC MEAN
2.15E-04
6.09E-01
HIGHEST CONDUCTIVITY
1.35E-02
3.82E+01
LOWEST CONDUCTIVITY
2.48E-05
7.03E-02
Prepared by: RAG Checked by: DMY
Notes:
Slug tests were analyzed using the Bouwer-Rice mathmatical model, unless where indicated.
cm/sec - centimeter per second
ft/day - feet per day
-- No statistics necessary, when only one slug test analyzed
P:\Duke Energy Carolinas\18. MARSHALL\CSA Update January 2018\Final\Tables\Table 6-15 In -Situ Hydraulic
ConductivitiesSummary Results by Unit
Page 6 of 6

Table 6-16. Estimated Effective Porosity/Specific Yield and Specific Storage for Upper Hydrostratigraphic Units (A, F, S, M1, and
M2)
Effective Porosity/Specific Yield (%)
Specific Storage (1/ft)
Hydrostratigraphic Unit
N
Mean (%)
Median (%)
Mean +
1 SD (%)
Mean - 1SD
(%)
Minimum
(%)
Maximum
(%)
Ash
12
14.1 %
10.5%
23.2%
5.1 %
5.0%
32.0%
-
Fill
17
13.9%
14.0%
19.1 %
8.6%
4.5%
27.0%
6.1 E-05 - 4.0E-05
Alluvium (S)
18
17.4%
16.5%
29.0%
5.8%
3.0%
40.0%
3.0E-04 - 1.5E-05
M1
30
22.8%
25.5%
31.9%
16.4%
5.0%
35.0%
3.0E-04 - 1.5E-05
M2
4
27.9%
27.5%
31.3%
24.5%
25.0%
31.5%
1.5E-05 - 6.2E-05
Notes:
1. Effective porosity/specific yield estimated from soil testing using Fetter/Bear Diagrams (Johnson, 1967).
2. Effective porosity and specific yield are not synonymous. For practical purposes, they may be estimated as approximately equal in value.
3. Specific Storage ranges based on published values (Domenico and Mifflin, 1965). Alluvium and M1 fall within the same range of values.
4. Initial data from Allen (N=5), Buck (N=2), Cliffside (N=2), Dan River (N=8), and Marshall (N=1) CSA Investigations were used in the statistical
analysis for alluvium effective porosity/specific yield.
Marshall Steam Station
Source: HDR, Comprehensive Site Assessment Report Marshall Steam Station Ash Basin, September 8, 2015. Page 1 of 1

Table 6-17. Total Porosity, Secondary (Effective) Porosity/Specific Yield, and Specific Storage for Lower Hydrostratigraphic Units (TZ and BR)
H drostrati ra hic Unit
y g p
Secondary (Effective) Porosity /
Total Porosity%
( )
Specific Storage 1/ft
p g( )
Specific Yield %
Transition Zone (TZ)
5.0 - 10.0
1.0 - 10.0
1.0E-06 - 2.1 E-05
Bedrock (BR)
2.0 - 5.0
0.01 - 1.0
< 1.0E-06
Notes:
1. Ranges based on published values (Domenico and Mifflin, 1965; Singhal and Gupta, 2010). 2. Effective porosity and specific yield are not synonymous. For practical purposes, they may be estimated as approximately
equal in value.
Marshall Steam Station
Source: HDR, Comprehensive Site Assessment Report Marshall Steam Station Ash Basin, September 8, 2015. Page 1 of 1

Table 6-18. Field Permeability Test Results
Borehole
Category of Test
Depth 1 of
Test (ft bgs)
Depth 2 of
Test (ft bgs)
Vertical Hydraulic
Conductivity'k'
(cm/sec)
Horizontal Hydraulic
Conductivity'k'
(cm/sec)
Hydrostratigraphic Layer
AB-3D
Falling Head, Well Point
120
126
9.01E-06
TZ/BR
AB-4D
Constant Head, Well Point
41.5
46.5
3.46E-04
A
AB-4D
Falling Head, Flush Bottom
41.5
-
3.07E-05
A
AB-4D
Constant Head, Well Point
50.5
55.5
4.12E-03
M1
AB-4D
Falling Head, Flush Bottom
50.5
-
2.09E-05
M1
AB-5BR
Falling Head, Well Point
72
77
9.43E-05
TZ
AB-7D
Falling Head, Flush Bottom
39
-
3.01 E-05
M2
AB-7D
Falling Head, Well Point
40.5
45.5
1.18E-05
M2
AB-7D
Constant Head, Well Point
75
79.7
1.90E-04
TZ
AB-8D
Falling Head, Well Point
85
91.3
7.98E-06
M2/TZ
AB-10D
Falling Head, Well Point
24.6
30
6.43E-05
A
AB-10D
Falling Head, Flush Bottom
24.6
-
5.60E-04
A
AB-10D
Constant Head, Well Point
53
58
4.75E-04
M1/M2
AB-10D
Falling Head, Flush Bottom
53
-
5.22E-04
S
AB-10D
Constant Head, Well Point
64.5
71.1
7.78E-04
TZ/BR
AB-10D
Falling Head, Well Point
64.5
71.1
6.40E-04
TZ/BR
AB-11D
Falling Head, Well Point
14
19
1.43E-05
M1/M2
AB-11D
Falling Head, Flush Bottom
14
-
1.43E-05
M1
AB-11D
Constant Head, Well Point
65
70
5.61E-03
BR
AB-15BR
Falling Head, Well Point
60.9
65.6
8.27E-04
BR
AB-15D
Constant Head, Well Point
25
30
4.55E-04
A
AB-15D
Falling Head, Flush Bottom
25
-
5.64E-05
A
AB-15D
Falling Head, Well Point
50
55
2.91E-06
M2
AB-15D
Falling Head, Flush Bottom
50
-
4.59E-05
M2
AB-15D
Falling Head, Well Point
60
65
4.94E-04
BR
AB-17D
Falling Head, Well Point
16.5
22
9.28E-06
A
AB-17D
Falling Head, Flush Bottom
16.5
-
1.19E-05
A
AB-17D
Falling Head, Well Point
61
65
4.27E-06
M2
AB-17D
Falling Head, Flush Bottom
61
-
1.48E-05
M2
AB-18D
Constant Head, Well Point
64
69
3.17E-03
BR
AB-21D
Falling Head, Well Point
56.2
60.7
1.19E-04
M2
AL-2BR
Falling Head, Well Point
137
142
1.30E-04
M2
AL-2BR
Falling Head, Well Point
178.2
183.2
1.47E-04
BR
BG-1D
Falling Head, Well Point
27
31.2
3.40E-05
TZ
GWA-3D
Falling Head, Well Point
31
36
6.75E-05
M2
GWA-3GT
Falling Head, Well Point
5
10
7.44E-05
M2
GWA-3GT
Falling Head, Flush Bottom
5
-
8.34E-06
M1
GWA-3GT
Falling Head, Flush Bottom
16
-
4.79E-05
M1
GWA-5D
Falling Head, Well Point
34.5
39.5
1.25E-05
BR
GWA-5S
Falling Head, Well Point
22.3
27
3.18E-04
M1
GWA-5S
Falling Head, Flush Bottom
22.3
-
7.29E-05
M1
GWA-5S
Falling Head, Flush Bottom
31.5
-
1.58E-03
M2
GWA-8D
Falling Head, Well Point
46.2
51.2
1.31E-04
BR
GWA-8GT
Falling Head, Well Point
13
18
2.17E-04
M1
GWA-8GT
Falling Head, Flush Bottom
13
-
4.09E-04
M1
GWA-8GT
Falling Head, Well Point
28
33
3.94E-05
M2
AB-15BR
Packer Test
90
95.5
2.34E-05
BR
AB-15BR
Packer Test
101
106.5
BR
AB-15BR
Packer Test
110
115.8
3.11 E-04
BR
AB-5BR
Packer Test
97
103.5
BR
AB-5BR
Packer Test
104
110.5
5.93E-05
BR
AB-5BR
Packer Test
112
118.5
1.32E-05
BR
AB-6BR
Packer Test
85
91.5
2.39E-06
BR
Marshall Steam Station
Source: HDR, Comprehensive Site Assessment Report Marshall Steam Station Ash Basin, September 8, 2015. Page 1 of 2

Table 6-18. Field Permeability Test Results
AB-6BR
Packer Test
95
101.5
2.59E-05
BR
AB-6BR
Packer Test
103
109.5
8.16E-05
BR
AB-9BR
Packer Test
78.5
84
6.11 E-05
BR
AB-9BR
Packer Test
94
99.5
2.05E-04
BR
AB-9BR
Packer Test
98.9
104.4
7.64E-06
BR
GWA-9BR
Packer Test
78
83.5
6.64E-05
BR
GWA-9BR
Packer Test
84.5
90
1.35E-04
BR
GWA-9BR
Packer Test
93
98.5
9.94E-05
BR
Notes:
1. Refer to Section 11.2.1 for discussion of field procedures
2. Refer to Appendix H for calculation worksheets
3. For the pressure test, the thickness of saturated material above a relatively impermeable bed is assumed to be 600 feet for
a fractured bedrock system. Water flow at this depth or greater in such systems is well documented in the Piedmont region (Daniel et al., 1989)
Marshall Steam Station
Source: HDR, Comprehensive Site Assessment Report Marshall Steam Station Ash Basin, September 8, 2015. Page 2 of 2

Table 6-19. Laboratory Permeability Test Results
Borehole
Depth 1 of Test (ft
bgs)
Depth 2 of Test (ft
bgs)
Vertical Hydraulic Conductivity'k'
(cm/sec)
Hydrostratigraphic Layer
AB-1 BR
10
12
1.68E-05
F
AB-1 BR
20
22
1.12E-04
F
AB-3D
76
78.2
6.52E-07
M1
AB-4D
55.5
56.5
6.42E-05
M1
AB-7D
0
2.5
1.19E-04
A
AB-8D
30.5
32.1
6.23E-07
M1
AB-9BR
11
12.5
5.92E-05
F
AB-11 D
9
11.5
9.73E-06
M1
AB-11 D
12.5
13.5
5.64E-05
M1
AB-14D
45
45.8
1.33E-04
M2
AB-21 D
37
39
1.68E-06
M1
GWA-3GT
14
14.5
1.48E-04
M1
GWA-5S
22.3
24
2.50E-04
M1
Notes:
1. Vertical hydraulic conductivity values from laboratory testing in accordance with ASTM Standard D 5084
2. Refer to Appendix H for laboratory reports.
Marshall Steam Station
Source: HDR, Comprehensive Site Assessment Report Marshall Steam Station Ash Basin, September 8, 2015. Page 1 of 1

TABLE 7-1
PROVISIONAL BACKGROUND THRESHOLD VALUES FOR SOIL
MARSHALL STEAM STATION
DUKE ENERGY CAROLINAS, LLC, TERRELL, NC
Parameter
Reporting Unit
PSRG Protection
of Groundwater
PBTV
PH*
S.U.
NE
4.7 - 6.1
Aluminum
mg/kg
NE
56,437
Antimony
mg/kg
0.9
0.65
Arsenic
mg/kg
5.8
4.697
Barium
mg/kg
580
819
Beryllium
mg/kg
63
3.9
Boron
mg/kg
45
8.7
Cadmium
mg/kg
3
0.11
Calcium
mg/kg
NE
1500
Chloride
mg/kg
NE
13
Chromium
mg/kg
3.8
32.8
Cobalt
mg/kg
0.9
53.1
Copper
mg/kg
700
180
Iron
mg/kg
150
78,228
Lead
mg/kg
270
82.5
Magnesium
mg/kg
NE
32,462
Manganese
mg/kg
65
2,872
Mercury
mg/kg
1
0.1
Molybdenum
mg/kg
NE
3.5
Nickel
mg/kg
130
18.6
Nitrate (as N)
mg/kg
NE
0.56
Potassium
mg/kg
NE
29,937
Selenium
mg/kg
2.1
1.77
Sodium
mg/kg
NE
394
Strontium
mg/kg
NE
7.53
Sulfate
mg/kg
NE
36
Thallium
mg/kg
0.28
1.1
Vanadium
mg/kg
6
210
Zinc
mg/kg
1200
125
Prepared by: JHG Checked by: HHS
Notes•
* - Upper and lower threshold values calculated for parameter
PBTV - Provisional Background Threshold Value
mg/kg - milligrams per kilogram
NE - Not Established
PZuke Energy CarolinasM. MARSHALMSA Update January 2018TInal\Tables7able 7-1 - Soil PBTVs Page 1 of 1

FACILITY NAME: Marshall Steam Station
SPREADSHEET PREPARED BY: TDP
SPREADSHEET CHECKED BY: BDW
TABLE 7-2
POTENTIAL SECONDARY SOURCE SOIL ANALYTICAL RESULTS
MARSHALL STEAM STATION
DUKE ENERGY CAROLINAS, LLC, TERRELL, NC
Reporting Units
PSRG Protection of Groundwater
Provisional Background Threshold Values
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
mg/kg
5.8
580
3.8
150
NE
130
2.1
NE
NE
6
4.69
819
32.8
78228
3.5
18.6
1.77
7.53
36
210
Sample ID
Water Level (ft btoc)
Saturated/Unsaturated
Location With
Repect to
Groundwater Flow
Direction
Sample Collection
Date
Arsenic
Barium
Chromium
Iron
Molybdenum
Nickel
Selenium
Strontium
Sulfate
Vanadium
AB-01BR (24-25)
3.00
Saturated
Downgradient
06/28/2015
<6.5
70
5.6
9680
<3.2
1.2 j
<6.5
18.1
<304
15.8
AB-02S (6-7)
20.14
Unsaturated
Downgradient
07/01/2015
2.8 j
74
5.3
10600
<2.7
1.6
<5.5
24.1
<262
21.7
AB-03D (74-75.5)
19.81
Saturated
Source Area
5/19/2015
<6.3
62.3
4.7
5980
<3.2
3.6
1.4 j
8.3
<302
31.2
AB-03D (78.2-79.7)
19.81
Saturated
Source Area
05/19/2015
5.8 j
226
2.5
19100
<3.8
1.6 j
5.4 j
31.4
<377
43.2
AB-04SL (53.5-55.5)
12.60
Saturated
Source Area
05/21/2015
6.4 j
214
4.7
34000
<3.7
5.2
<7.4
71
<361
56.3
AB-05BR (105-105)
8.69
Saturated
Source Area
07/07/2015
<5.3
97.9
11.6
10900
<2.6
7.4
<5.3
22.2
<248
22
AB-05D (54-55)
8.16
Saturated
Source Area
05/21/2015
<6.2
98.3
7.8
7500
<3.1
2.7
<6.2
41
<319
19.3
AB-05D (64-66)
8.16
Saturated
Source Area
05/21/2015
<5.6
164
40.4
19800
<2.8
9.6
<5.6
59.2
<287
51
AB-06BR (56-57.5)
19.13
Saturated
Source Area
O5/29/2015
8
1360
246
37500
<2.7
182
3.3 j
253
<277
104
AB-06BR (57.5-59)
19.13
Saturated
Source Area
05/29/2015
8.5
1100
217
32000
<2.8
182
<5.7
295
<274
83.5
AB-06D (53-55)
17.27
Saturated
Source Area
04/16/2015
6.2 j
942
172
36600
<3.6
141
<7.2
206
<354
77.2
AB-07D (29-30.5)
20.55
Saturated
Source Area
05/11/2015
5.5 j+
552 j+
9
34600 j+
<4.4
21.3
<8.7
208 j+
<414
123 j+
AB-08D (24-25.5)
9.60
Saturated
Source Area
O5/14/2015
<6
91.3
39.4
23900
<3
11.3
<6
28
<313
53.1
AB-08D (29-30.5)
9.60
Saturated
Source Area
05/14/2015
4.8 j
121
36.2
36300
<3.3
14.1
<6.6
63.4
<322
83.1
AB-09BR (10-12)
7.23
Saturated
Source Area
06/30/2015
4.8 j
426
405
26200
<3
169
<6
165
<294
75.7
AB-09BR (79-79)
7.23
Saturated
Source Area
07/07/2015
5.9
568
13.7
15600
<2.5
15
<5
43.5
<249
33.8
AB-10D (52-53)
12.68
Saturated
Source Area
05/02/2015
<6
116
21.4
22500
<3
8.5
<6
33.1
<295
48.5
AB-10D (61-62)
12.68
Saturated
Source Area
05/04/2015
<6.1
174
25.6
22800
<3
13.2
<6.1
26.7
<291
50
AB-11D (3-5)
4.86
Saturated
Source Area
06/23/2015
<6.8
106 j+
11.5
16200 j-
<3.4
6.5
<6.8
22.9 j+
<324
36.1
AB-11D (12.3-13.8)
4.86
Saturated
Source Area
06/23/2015
<6.7
79.9
13.4
10000
<3.3
10.3
<6.7
46.6
<326
18.9
AB-12D (49-50.5)
4.41
Saturated
Source Area
04/30/2015
3.9 j
130
18.7
8950
<3.4
9
<6.7
33.4
<336
34.7
AB-13D (63-64)
26.91
Saturated
Source Area
05/18/2015
4.5 j
387
115
30300
<3.2
82.4
<6.3
95.8
<316
67.5
AB-13D (70-71)
26.91
Saturated
Source Area
05/19/2015
4.3 j
651 j-
28.7 j-
42500 j-
<2.9
51.1 j-
<5.7
100 j-
<298
110
AB-14D (39-40.5)
14.41
Saturated
Source Area
06/04/2015
<6.9
87.8
11.8
12000
<3.4
4.4
<6.9
11.9
<336
39
AB-14D (44-45.5)
14.41
Saturated
Source Area
06/04/2015
<6.5
126
3.2
10900
<3.3
1.4 j
<6.5
16.1
<322
21.2
AB-15BR (104.5-104.5)
16.15
Saturated
Source Area
07/07/2015
<4.8
334
20.7
10800
<2.4
15.7
<4.8
21.7
<245
27.2
AB-15D (48-49)
19.66
Saturated
Source Area
05/06/2015
4.2 j
649
81.3
90500
8.1
23.6
<7.7
44.3
<378
215
AB-15D (54-55)
19.66
Saturated
Source Area
O5/16/2015
18.9
479
35.8
46000
5.1
20.6
<6.6
72
160 j-
103
AB-16D (5-6)
7.32
Saturated
Source Area
07/09/2015
<8
189
19.9
29300
0.48j
19.1
<8
29.6
<383
104
AB-16D (12-14)
7.32
Saturated
Source Area
07/09/2015
<6.9
363
61
38900
1.4
20.1
<6.9
41.2
<338
148
AB-17D (3-5)
13.60
Unsaturated
Source Area
05/13/2015
<7.5
161
10.5
25900
<3.7
5.4
<7.5
12.6
<385
75.1
AB-17D (31-32)
13.60
Saturated
Source Area
5/14/2015
<7.8
472
17.3
45100
<3.9
27.2
<7.8
9.1
<374
160
AB-20D (91-92)
66.11
Saturated
Source Area
06/04/2015
<7.2
239
32.9
49400
<3.6
26.6
<7.2
9.7
<352
60.8
AB-20D (96-97)
66.11
Saturated
Source Area
06/04/2015
<7
492
47.8
43700
<3.5
34.1
<7
16
<342
79.9
AB-21D (14-15.5)
17.37
Saturated
Source Area
05/20/2015
4.9j
397
531
28400
<3.9
203
<7.8
64.4
<362
64.1
AB-21D (14-15.5)
17.37
Saturated
Source Area
06/23/2015
5.1j
131
23.5
5960
<5
9
<10.1
65.2
690
12.4
AB-21D (14-15.5)
17.37
Saturated
Source Area
06/24/2015
3.8j
239
13.3
22900
<3.3
10.1
<6.6
19.4
<331
90.8
AL-01D (32-34)
43.90
Unsaturated
Downgradient
06/30/2015
10.5
319
lj
26200
<2.9
1.5j
7.1
82.6
<294
54
AL-01D (38-40)
43.90
Unsaturated
Downgradient
06/30/2015
3.9 j
288
1.3 j
22100
<3.8
1.3 j
<7.6
71
<375
41.8
AL-01D (40-41)
43.90
Unsaturated
Downgradient
06/30/2015
4.3j
402
1.9
27100
<3.7
1.9
<7.3
119
<360
52.3
AL-02BR (204-204)
112.10
Saturated
Source Area
07/07/2015
3.5 j
685
21.8
29600
<2.5
12.4
<5
51
<247
73.5
AL-02D (90-92)
113.92
Unsaturated
Source Area
05/13/2015
6.3 j
258
97.9
38400
<3.3
24.1
4.5 j
94.8
<318
82
AL-02D (95-97)
113.92
Unsaturated
Source Area
05/13/2015
<6.1
96.5
10.1
11600
<3.1
4.4
<6.1
31.9
<305
20.4
AL-03D (118-120)
113.37
Saturated
Source Area
05/01/2015
6 j
614
154
46600
<3.6
138
6 j
221
<364
95.8
AL-03D (124-126)
113.37
Saturated
Source Area
05/01/2015
3.6 j
1530
348
51600
<3.2
281
<6.5
331
<316
95.4
P:\Duke Energy Carolinas\18. MARSHALL\CSA Update January 2018\Final\Tables\Table 7-2 Secondary Source Page 1 of 2

TABLE 7-2
POTENTIAL SECONDARY SOURCE SOIL ANALYTICAL RESULTS
MARSHALL STEAM STATION
DUKE ENERGY CAROLINAS, LLC, TERRELL, NC
Sample ID
Water Level (ft btoc)
Saturated/Unsaturated
Location With
Repect to
Groundwater Flow
Sample Collection
Date
Arsenic
Barium
Chromium
Iron
Molybdenum
Nickel
Selenium
Strontium
Sulfate
Vanadium
AL-04D (81.5-82.5)
106.37
Unsaturated
Source Area
05/14/2015
4.5 j
716
46.2
49000
<3.4
32.2
<6.7
183
132
AL-04D (87.5-89.5)
106.37
Unsaturated
Source Area
05/14/2015
<5.9
636
19.5
45100
<3
25
<5.9
77.1
<287
100
GWA-01BR (8-10)
41.30
Unsaturated
Downgradient
06/26/2015
<5.7
128
6
16000
<2.9
5.3
<5.7
19.8
<302
30.4
GWA-01BR (18-20)
41.30
Unsaturated
Downgradient
06/26/2015
<6.2
118
13.4
18100
<3.1
9.5
<6.2
12.2
<297
46.7
GWA-01BR (92-94)
41.30
Saturated
Downgradient
06/26/2015
<7.1
235
11.5
29000
<3.6
6.5
<7.1
37.7
<337
83.4
GWA-02D (16-17)
23.34
Unsaturated
Downgradient
05/14/2015
<6.4
258 j-
16.5
30700 j-
<3.2
8.9 j-
<6.4
4.6
172 j-
112
GWA-02D (21-22)
23.34
Saturated
Downgradient
05/14/2015
<6.6
246
14.6
36700
<3.3
12.6
5.1
<325
118
GWA-02D (46-47)
23.34
Saturated
Downgradient
05/14/2015
<5.4
262
78
28600
<2.7
54
<5.4
44.9
<264
66.8
MW-14BR (31.5-33)
36.42
Unsaturated
Downgradient
07/10/2015
<6.5
828
61.9
50400
3
45.2
<6.5
19.1
<329
128
MW-14BR (36.5-38)
36.42
Saturated
Downgradient
07/10/2015
<6
497
39.5
57800
12.9
23.5
<6
65.5
216 j
145
MW-14BR (40-41.5)
36.42
Saturated
Downgradient
07/10/2015
<5.7
401
41.7
51200
10.8
14.6
<5.7
31.8
146 j
MW-14BR (53-53)
36.42
Saturated
Downgradient
07/12/2015
<5.4
250
46.8
18700
0.63
22.3
<5.4
29.8
<262
37
OB-01 (42-43)
57.34
Unsaturated
Source Area
05/11/2015
282
4.7
38100
<3
7.5
32
<308
65.3
OB-01 (48-49)
57.34
Unsaturated
Source Area
05/11/2015
280
4.4
34200
<3
5.3
36.4
<306
55.5
OB-01 (68.5-69.5)
57.34
Saturated
Source Area
05/11/2015
3.2 j
75.6
2.3
8910
<2.8
1.5
<5.7
28.4
<286
12.1
SB-01 (13.5-14.5)
NM
Unsaturated
Source Area
06/28/2015
<6.2
170
13.6
23200
<3.1
8.1
<6.2
26.9
<301
48.2
SB-01 (33-34)
NM
Saturated
Source Area
06/28/2015
<7.6
75.3
20.1
46300
<3.8
4.3
<7.6
30.1
<361
82.4
SB-02 (67.5-68.5)
NM
Saturated
Source Area
04/23/2015
<6.1
85.8
14
12100
<3
4.2
<6.1
23.7
969 j-
38.4
SB-02 (73-74)
NM
Saturated
Source Area
04/23/2015
3.2 j
120
2.3
15600
<3.1
2.6
<6.1
11.2
1040 j-
28.6
SB-03 (79-80)
NM
Saturated
Source Area
04/22/2015
<6.2
141
16.2
13300
<3.1
5.1
<6.2
27.1
<317
56.7
SB-03 (86-87)
NM
Saturated
Source Area
4/22/2015
<6.9
42.9
<1.7
5670
<3.5
1.23
<6.9
7.9
<332
<6.9
SB-04 (50-51)
NM
Saturated
Source Area
04/29/2015
<6.5
101
2.9
18100
<3.2
3.9
<6.5
13
843 j-
38.7
SB-04 (57-58)
NM
Saturated
Source Area
04/29/2015
<8.1
225
4.3
15500
<4
6.8
<8.1
13.5
221 j-
46.8
SB-07 (70-71)
NM
Saturated
Source Area
04/30/2015
<6.2
85.3
25.3
9020
<3.1
9.5
<6.2
4.4
406
50.1
SB-08 (31-32)
NM
Unsaturated
Source Area
04/14/2015
<6.8
284
27
40100
<3.4
26.9
<6.8
10
2950
73.3
SB-10 (25-26)
NM
Saturated
Source Area
05/15/2015
4 j
33.7
16.9
78800
3.1 j
36.5
<6.2
11.1
<318
173
SB-10 (30-31)
NM
Saturated
Source Area
05/15/2015
<6.3
96.9
59400
<3.2
23.7
<6.3
16.7
<316
129
SB-11 (38-40)
NM
Saturated
Source Area
05/19/2015
<6.8
95.5
1.6 j
4370
<3.4
<1.7
<6.8
11
<341
5.5 j
SB-13 (15.4-16.1)
NM
Saturated
Source Area
03/19/2015
3.1 j
358 j-
18.7
41200
<0.78
14.5
90.4 j-
342 j
90.8
SB-13 (20-20.8)
NM
Saturated
Source Area
03/19/2015
4.7
380
17.7
43100
<0.74
17.7
104
282 j
99.8
SB-14 (35-36)
NM
Saturated
Source Area
05/19/2015
4.6 j
193
59.3
35800
3.5 j
47.3
<7.4
20.2
<357
77.8
SB-15 (86.5-87.5)
NM
Saturated
Source Area
05/05/2015
3.5 j
135
18.7
24800
<3.5
8.5
<6.9
35.3
<347
57.9
SB-15 (92-93)
NM
Saturated
Source Area
05/05/2015
187
2.2
20600
<3
2.2
5.9 j
53.2
1140 j-
48.1
Notes:
lmmqConcentration greater than PSRG Protection of Groundwater, which is greater than PBTV.
=Concentration greater than PBTV, which is greater than PSRG Protection of Groundwater.
Water level data collected on 9/22/2017
ft btoc- feet below top of casing
j- - estimated concentration, biased law
j+ - estimated concentration, biased high
NA- Not Available
ND- Non -Detect
NM- not measured; general water elevation obtained from comparison of potentiometric surface map to boring locations
P:\Duke Energy Carolinas\18. MARSHALL\CSA Update January 2018\Final\Tables\Table 7-2 Secondary Source Page 2 of 2

TABLE 10-1
GROUNDWATER PROVISIONAL BACKGROUND THRESHOLD VALUES
MARSHALL STEAM STATION
DUKE ENERGY CAROLINAS, LLC, TERRELL, NC
Parameter
Reporting Unit
NCAC 02L Standard
Background Threshold Values
Shallow
Deep
Bedrock
pH*
S.U.
6.5-8.5
4.6-6.4
5.7-6.9
5.6-7.6
Alkalinity
mg/L
NE
63
204
108
Aluminum
pg/L
NE
757
128
300
Antimony
pg/L
1°
0.5
0.5
0.5
Arsenic
pg/L
10
0.4
0.6
0.6
Barium
pg/L
700
310
127
435
Beryllium
pg/L
4°
0.2
0.1
0.2
Bicarbonate
m g/L
NE
63
204
108
Boron
ug/L
700
50
50
50
Cadmium
pg/L
2
0.08
0.08
0.08
Calcium
mg/L
NE
10.7
13.1
15
Carbonate
mg/L
NE
5.0
5.0
5.0
Chloride
mg/L
250
5.5
4.7
4.5
Chromium (VI) 1
pg/L
10
5.7
3.0
3.9
Chromium
pg/L
10
16.5
7.6
8.3
Cobalt
pg/L
1°
1.2
1.9
2.8
Copper
pg/L
1000
3.8
2.8
4.2
Iron
pg/L
300
744
272
792
Lead
ug/L
15
0.3
0.1
0.2
Magnesium
mg/L
NE
1.8
14.4
13.2
Manganese
pg/L
50
75.3
141
26.6
Mercury
pg/L
1
0.2
0.2
0.2
Methane
ug/L
NE
10
10
10
Molybdenum
pg/L
NE
0.5
3.2
3
Nickel
ug/L
100
9.9
7.5
7.2
Nitrate + Nitrite
mg-N/L
NE
2.7
1.4
0.4
Potassium
mg/L
NE
5
7.8
9.8
Selenium
pg/L
20
0.5
0.5
0.5
Sodium
mg/L
NE
9.1
29.2
14
Strontium
pg/L
NE
303
665
253
Sulfate
mg/L
250
4.2
17.7
18.4
Sulfide
mg/L
NE
0.1
0.1
0.1
TDS
mg/L
500
140
183
216
Thallium
pg/L
0.2"
0.1
0.1
0.1
TOC
mg/L
NE
1
1
1
Vanadium
pg/L
0.3"
5.6
3.8
16
Zinc
pg/L
1000
19.2
17
11.9
Radium (Total)
pCi/L
NE
3.0
2.8
5.7
Uranium (Total)
pg/mL
NE
0.0005
0.0005
0.0005
Prepared by: JHG Checked by: MCM
Notes:
* - Upper and lower tolerance limits calculated for parameter
- Interim Maximum Allowable Concentrations (IMACs) of 15A NCAC .021- Standard, Appendix 1, April 1, 2013
Provisional; dataset contains less than 10 valid samples
- Hexavalent chromium does not have a NC 2L/IMAC standard; therefore, the NC 21 standard for total chromium is relied upon as a surrogate.
pg/L - micrograms per liter
pg/mL - micrograms per milliliter
mg - N/L - Milligrams nitrogen per liter
mg/L - milligrams per liter
NA - Not available; dataset contains zero valid samples
NE - Not Established
pCi/L - picocuries per liter
Radium (Total) - Radium-226 and Radium-228 combined
S.U. - Standard Unit
TDS - Total Dissolved Solids
Uranium (Total) - Uranium-233, Uranium-234, Uranium-236, and Uranium-238 combined
P:\Duke Energy Carolinas\38. MARSHALL\CSA Update January 2018\Final\Tables\Table 10-1 - GW PBTVs Page 1 of 1

TABLE 10-2
CHARGE BALANCE SUMMARY
MARSHALL STEAM STATION
DUKE ENERGY CAROLINAS, LLC, TERRELL, NC
Marshall
Sample Locations
Anions me L 'M4.37
% Difference
AB-01BR
7.71
3.02
AB-01D
7.83
2.26
AB-01S
9.51
8.37
AB-02D
4.98
3.10
AB-02S
0.25
12.98
AB-03D
3.85
6.39
AB-03S
11.00
10.30
3.31
AB-04D
1.49
1.57
2.42
AB-04S
1.42
1.51
3.08
AB-04SL
2.35
2.51
3.33
AB-05BR
6.52
7.12
4.38
AB-05D
4.05
4.59
6.25
AB-05S
31.20
13.10
40.76
AB-06BRA
9.81
7.81
11.36
AB-06D
4.62
5.13
5.30
AB-06S
15.30
16.60
3.88
AB-07D
1.52
1.81
8.64
AB-07S
37.20
40.30
3.96
AB-08D
3.74
4.01
3.53
AB-08S
5.43
5.16
2.56
AB-09BR
2.46
2.83
7.01
AB-09D
1.76
12.10
74.66
AB-09S
0.70
0.81
6.92
AB-10BR
5.99
6.94
7.39
AB-10D
4.98
5.51
5.05
AB-10S
23.30
24.70
2.98
AB-10SL
17.90
19.60
4.43
AB-11D
1.32
1.48
5.71
AB-11S
0.41
0.46
5.78
AB-12BR
4.69
5.45
7.53
AB-12D
10.70
11.40
3.17
AB-12S
94.20
100.00
3.19
AB-12SL
9.73
10.20
2.22
AB-13D
2.85
3.30
7.28
AB-13S
5.65
6.32
5.58
AB-14D
1.69
1.79
2.81
AB-14S
24.20
24.70
1.10
AB-15BR
3.97
4.45
5.64
AB-15D
3.85
4.22
4.48
AB-15S
9.53
10.80
6.41
AB-15SL
6.55
6.66
0.83
AB-16D
2.44
3.01
10.37
AB-16S
1.62
1.88
7.32
AB-17D
1.01
1.15
6.63
AB-17S
15.00
14.70
1.13
AB-18D
1.11
1.22
4.97
AB-18S
5.76
6.55
6.38
AB-20D
1.84
2.02
4.42
AB-20S
73.80
76.70
1.92
AB-21D
2.60
2.68
1.39
AB-21S
23.70
14.60
23.82
AL-01 BR
5.67
6.01
2.94
AL-01D
8.57
8.68
0.62
AL-015
1 8.11
8.12
0.05
P:\Duke Energy Carolinas\18. MARSHALL\CSA Update January 2018\Final\Tables\Table 10-2 Anion - Cation Marshall Page 1 of 3

TABLE 10-2
CHARGE BALANCE SUMMARY
MARSHALL STEAM STATION
DUKE ENERGY CAROLINAS, LLC, TERRELL, NC
Marshall
Sample Locations
Anions me L '
Cations me L '
% Difference
AL-02BR
5.59
5.53
0.54
AL-02BRL
3.80
0.00
100.00
AL-02D
19.80
21.50
4.13
AL-02S
31.20
0.17
96.38
AL-03BR
4.73
5.16
4.33
AL-03D
10.20
10.50
1.33
AL-03S
62.00
65.00
2.34
AL-04BR
4.23
4.51
3.18
AL-04D
21.60
22.90
2.89
BG-01BRA
1.90
2.20
7.30
BG-01D
1.54
1.82
8.26
BG-01S
0.68
0.76
5.72
BG-02BR
1.61
1.95
9.62
BG-02S
1.21
1.47
9.72
BG-03BR
2.09
2.51
9.17
BG-03D
2.06
2.44
8.61
BG-03S
1.37
1.61
7.93
GWA-01BR
1.81
1.94
3.59
GWA-01D
5.65
6.18
4.48
GWA-01S
0.42
0.49
7.50
GWA-02DA
2.51
1.96
12.37
GWA-02S
1.28
1.39
1.41
GWA-03D
0.94
1.01
3.42
GWA-03S
0.60
0.67
5.59
GWA-04D
2.69
3.09
6.94
GWA-04S
0.32
0.48
18.97
GWA-05D
0.31
0.40
12.84
GWA-05S
0.28
0.31
5.50
GWA-06D
1.10
1.24
5.65
GWA-06S
0.43
0.43
0.27
GWA-07D
1.69
2.10
10.77
GWA-07S
1.31
1.62
10.50
GWA-08 D
0.74
0.83
6.08
GWA-08S
0.70
0.75
3.62
GWA-09BR
0.26
1.00
58.86
GWA-10D
5.41
5.72
2.82
GWA-10S
1.39
1.43
1.18
GWA-11BR
2.49
2.71
4.30
GWA-11D
3.02
3.39
5.81
GWA-11S
5.59
6.23
5.37
GWA-12BR
1.11
1.29
7.43
GWA-12D
2.70
2.23
9.53
GWA-12S
0.18
0.25
16.26
GWA-13DA
1.91
1.94
0.67
GWA-13S
0.15
0.16
3.41
GWA-14D
0.74
0.85
7.39
GWA-14S
0.18
0.20
4.91
GWA-15S
6.58
6.66
0.58
MRl
0.71
0.15
65.44
MR10
0.40
0.11
58.39
MR11
0.66
0.11
71.57
MR12
0.62
0.18
55.18
MR13
0.87
1.51
26.66
M R 14
0.60
0.94
21.51
MR16
1.44
0.44
52.83
MR17
0.67
0.22
49.77
MR18
0.81
0.23
54.97
MR2 Office
1.05
0.42
43.18
MR2 Plant
1.53
0.40
58.69
MR20
1.19
0.34
55.19
MR21
0.12
0.14
9.74
MR22
0.33
0.16
34.50
MR23
1.62
0.55
49.35
MR25
0.95
0.29
53.88
MR26
0.68
0.28
42.29
MR28
1.03
0.26
59.42
MR29
0.32
0.11
48.87
MR30
0.13
0.23
26.56
MR31
0.36
0.11
52.80
MR32
0.55
0.19
48.74
MR33
0.35
0.10
55.71
P:\Duke Energy Carolinas\18. MARSHALL\CSA Update January 2018\Final\Tables\Table 10-2 Anion - Cation Marshall Page 2 of 3

TABLE 10-2
CHARGE BALANCE SUMMARY
MARSHALL STEAM STATION
DUKE ENERGY CAROLINAS, LLC, TERRELL, NC
Marshall
Sample Locations
Anions me L '
Cations me L '
% Difference
MR35
1.03
0.32
52.75
MR36
1.08
0.00
99.27
MR37
0.29
0.10
48.57
MR38
0.27
0.15
29.73
MR4
2.95
1.11
45.28
M R40
0.84
0.20
61.67
MR42
0.37
0.09
60.88
MR43
0.52
0.25
35.25
M R44
0.69
0.22
51.56
MR45
0.33
0.14
38.59
MR46
0.53
0.10
68.60
M R47
0.26
0.09
48.20
MR48
0.40
0.09
62.78
MR6
0.75
0.26
47.83
MR8
0.57
0.17
54.85
MR9
0.45
0.12
58.53
MS-08
0.38
0.44
7.07
MS-09
0.79
0.90
6.64
MS-10
0.07
0.12
27.18
MS-11
0.34
0.32
3.89
MS-12
0.17
0.17
1.50
MS-13
0.35
0.46
14.11
MS-14
0.53
0.58
4.78
MS-15
1.53
1.81
8.20
MS-16
0.94
1.06
6.34
MW-01
4.37
4.47
1.12
MW-02
3.86
3.91
0.62
MW-03
0.31
0.69
37.72
M W-04
0.46
0.51
5.04
M W-04D
0.72
0.82
6.25
MW-05
0.29
0.36
10.17
M W-06D
4.02
4.25
2.83
M W-06S
2.57
2.48
1.75
M W-07D
6.02
6.19
1.41
M W-07S
7.72
6.70
7.09
M W-08D
4.68
4.96
2.86
M W-08S
7.99
9.11
6.54
M W-09D
4.36
4.71
3.85
M W-09S
5.00
6.31
11.58
MW-10D
0.52
0.59
6.00
VW-10S
0.12
0.16
14.15
M W-11 D
0.45
0.52
7.70
M W-11S
0.49
0.60
9.68
MW-12D
0.50
0.54
3.78
MW-12S
0.21
0.24
6.51
MW-13D
0.73
0.94
12.31
MW-13S
0.70
0.90
12.39
MW-14BR
2.34
2.44
1.94
MW-14D
6.32
5.62
5.87
MW-14S
10.30
8.03
12.37
OB-01 Ash Basin
7.03
7.58
3.78
OB-01 (Dry Ash Landfill
--
--
--
OB-02
OB-03
Prepared by: MMS Checked by: TDP
Notes:
Information not available
1 meq/L = milliequivalents per liter
P:\Duke Energy Carolinas\18. MARSHALL\CSA Update January 2018\Final\Tables\Table 10-2 Anion - Cation Marshall Page 3 of 3

TABLE I1-1
DATA INVENTORY SUMMARY
MARSHALL STEAM STATION
DUKE ENERGY CAROLINAS, LLC, TERRELL, NC
PARALLEL TO TRANSECT/CENTERLINE OF FLOW
PERPENDICULAR TO TRANSECT/CENTERLINE OF FLOW
DATE INVENTORY QUEDNS TAKEN FROM MMA GUIDANCE
STI
DOCUMENT-SECTION 4.3
TRANSECT 1 (WEST) - ALONG CENTERLINE OF PLUME
TRANSECT 2 (CENTRAL) - ALONG CENTERLINE OF PLUME
TRANSECT 3 (EAST)- ALONG CENTERLINE OF PLUME
WELLS PERPENDICULAR TO TRANSECT 1 (WEST)
WELLS PERPENDICULAR TO TRANSECT 2 (CENTRAL)
WELLS PERPENDICULAR TO TRANSECT 3 (EAST)
Have background concentrations been formally established
PBTV concentrations are included in the Comprehensive Data Table (Appendix B) and the Proposed Background Threshold Values for Naturally Occuring Concentrations in Groundwater and Soil
PBTV concentrations are included in the Comprehensive Data Table (Appendix B) and the Proposed Background Threshold Values for Naturally Occuring Concentrations in Groundwater and Soil
(a)
for all COIs In soil and groundwater?
(Appendix H)
(Appendix H)
For each source area, how many wells within each Flow
1 Ash Pore
2 Ash Pore
2 Shallow
3 Shallow
2 Ash Pore
4 Ash Pore
(b)
systems are located along the contaminant plume
3 Shallow
3 Deep
2 Deep
7 Shallow
5 Shallow
7 Shallow
centerline? Along a transact that is perpendicular to the
4 Deep
3 Bedrock
1 Bedrock
8 Deep
7 Deep
6 Deep
plume centerline?
1 Bedrock
1 Bedrock Lower
1 Bedrock
1 Bedrock
2 Bedrock
How many wells In (b) above are screened across the
Boron In Deep
Boron In Shallow
Boron In Shallow
Boron in Deep
Boron In Shallow
Boron in Shallow
(c)
most contaminated vertical interval of a given Flow unit or
4 Deep
2 Shallow
3 Shallow
7 Deep
5 Shallow
7 Shallow
are screened across the full thickness of the Flow unit?'
No wells are screened across the full thickness of an aquifer.
No wells are screened across the full thickness of an aquifer.
No wells are screened across the full thickness of an aquifer.
No wells are screened across the full thickness of an aquifer.
No wells are screened across the full thickness of an aquifer.
No wells are screened across the full thickness of an aquifer.
AB-5S* (9; 7/14/2015 - 9/25/2017)
AB-12S* (10; 7/8/2015 - 9/25/2017)
CCR-13S (9; 5/18/2016 - 8/7/2017)
GWA-2S (7; 7/16/2015 - 9/25/2017)
MW-7S (12; 11/8/2007 - 9/26/2017)
MW-14S (24; 2/7/2011 - 10/2/2017)
AB-5D (8; 10/1/2015 - 9/26/2017)
AB-12SL* (9; 7/8/2015 - 9/25/2017)
CCR-13D (9; 5/18/2016 - 8/7/2017)
s GWA-2D (0; NA)
MW-7D (14; 11/8/2007 - 9/26/2017)
MW-14D (28; 2/7/2011 - 10/2/2017)
AB-5BR (9; 7/17/2015 - 9/25/2017)
AB-12D (9; 7/8/2015 - 9/25/2017)
GWA-15S (3; 5/1/2017 - 9/28/2017)
GWA-2DA (0; NA)
AB-21S* (8; 7/15/2015 - 9/25/2017)
MW-14BR (9; 7/19/2015 - 9/25/2017)
AB-3S* (9; 7/9/2015 - 9/25/2017)
AB-12BR (3; 3/13/2017 - 9/25/2017)
GWA-11S (7; 4/27/2016 - 9/26/2017)
GWA-1S (7; 9/29/2015 - 9/26/2017)
AB-21D (8; 7/15/2015 - 9/25/2017)
GWA-10S (7; 4/27/2016 - 9/28/2017)
AB-313 (8; 7/11/2015 - 9/25/2017)
AB-9S (9; 7/16/2015 - 9/25/2017)
GWA-11D (7; 4/12/2016 - 9/26/2017)
GWA-ID (6; 4/12/2016 - 9/26/2017)
AB-8S* (8; 7/15/2015 - 9/25/2017)
GWA-lOD (7; 4/11/2016 - 9/28/2017)
AB-2S (8; 7/18/2015 - 9/26/2017)
AB-91) (8; 9/29/2015- 9/25/2017)
GWA-11BR (2; 4/27/2017 - 6/14/2017)
GWA-1BR (7; 7/19/2015 - 9/26/2017)
AB-8D (7; 9/28/2015 - 9/25/2017)
MW-6S (10; 8/28/2008 - 9/26/2017)
AB-213 (7; 4/12/2016 - 9/26/2017)
AB-9BR (6; 6/22/2016 - 9/25/2017)
MW-8S (11; 2/12/2008 - 9/26/2017)
MW-2 (34; 8/9/2000 - 9/27/2017)
MW-6D (10; 8/10/2009 - 9/26/2017)
MW-9S (14; 11/8/2007 - 9/26/2017)
AB -IS (6; 7/17/2015 - 9/28/2017)
MW-8D (11; 2/16/2009 - 9/26/2017)
AS-10S* (7; 9/28/2015 - 9/22/2017)
MW-1 (30; 8/9/2000 - 9/28/2017)
MW-9D (14; 11/8/2007 - 9/26/2017)
AB -ID (7; 9/28/2015 - 9/27/2017)
AB-4S* (8; 7/14/2015 - 9/25/2017)
AB-10SL* (8; 9/28/2015 - 9/22/2017)
CCR-12S (9; 5/18/2016 - 8/7/2017)
What is the length of record and how many valid samples
AB-IBR (7; 9/28/2015 - 9/27/2017)
AS-4SL* (7; 7/9/2015 - 9/25/2017)
AS-10D (9; 5/17/2015 - 9/22/2017)
CCR-12D (9; 5/18/2016 - 8/7/2017)
(d)
vents are available for wells listed in (b) and (c)?2
AB-1BRL (1; 10/17/2017)
AB-4D (8; 7/14/2015 - 9/25/2017)
AB-lOBR (4; 12/1/2016 - 9/22/2017)
CCR-145 (9; 5/18/2016 - 8/7/2017)
CCR-1S (9; 5/18/2016 - 8/7/2017)
CCR-9S (9; 5/18/2016 - 8/7/2017)
CCR-14D (9; 5/18/2016 - 8/7/2017)
CCR-1D (1; 6/12/2017)
s CCR-9D (0; NA)
AL -IS (8; 7/16/2015 - 9/25/2017)
CCR-2S (9; 5/17/2016 - 8/7/2017)
CCR-9DA (1; 4/18/2017)
AL-1D (9; 7/16/2015 - 9/25/2017)
CCR-2D (9; 5/17/2016 - 8/7/2017)
CCR-11S (9; 5/18/2016 - 8/7/2017)
AL-1BR (4; 12/6/2016 - 9/25/2017)
CCR-4S (9; 5/19/2016 - 8/7/2017)
CCR-I1D (9; 5/18/2016 - 8/7/2017)
CCR-4D (8; 5/18/2016 - 8/7/2017)
CCR-15S (9; 5/17/2016 - 8/7/2017)
CCR-SS (8; 5/18/2016 - 8/7/2017)
CCR-15D (9; 5/17/2016 - 8/7/2017)
CCR-5D (9; 5/18/2016 - 8/7/2017)
Total Record Date Range:
Total Record Date Range:
Total Record Date Range:
Total Record Date Range:
Total Record Date Range:
Total Record Date Range:
11/8/2007 - 9/26/2017
7/8/2015 - 10/17/2017
4/12/2016 - 9/28/2017
2/12/2008 - 9/26/2017
8/9/2000 - 9/27/2017
8/9/2000 - 10/2/2017
Does turbidity, well construction (for example, grout
86 valid samples
75 valid samples
37 valid samples
134 valid samples
165 valid samples
182 valid samples
(a)
contamination, etc.), o well "break in" issues preclude the
or
94 total samples
84 total samples
38 total samples
172 total samples
210 total samples
225 total samples
e of data in (b), (c) (or) (d)?J
8 samples omitted
9 samples omitted
1 sample omitted
38 samples omitted
45 samples omitted
43 samples omitted
Source area: # Samples; Flaw Layer = # Samples in Layer
Ash Basin: 164 solid phase samples; Ash = 64, Fill = 11, Shallow = 49, Deep = 35, Bedrock = 5
For each source area and within each flow unit, how many
Dry Ash Landfill (Phase I & 11): 24 solid phase samples; Ash = 12, Shallow = 0, Deep = 12, Bedrock = 0
spatial locations were sampled for solid phase chemistry
PV Structural Fill: 15 solid phase samples; Ash = 9, Shallow = 5, Deep = 1, Bedrock = 0
(O
and were these locations associated with "end member"
(maximum and minimum) groundwater concentrations for
Yes, spatial locations include maximum and minimum groundwater concentrations.
each contaminant? How many of these spatial locations
e associated with (b) or (c) above?4
14 samples total
10 samples total
0 samples
14 samples total
11 samples total
3 samples collected
S Deep
2 Shallow
2 Deep
4 Shallow
1 shallow
Given that Iron hydroxide (HFO) content Is a good
(g)
Indicator of retention capacity for most metal
2 samples collected
5 samples collected
1 sample collected
4 sample collected
1 sample collected
0 samples collected
contaminants, how man locations In f
y ()was HFO
1 In deep
2 in deep
0 In deep
3 In Deep
1 In deep
measured?
weapon. w these y—mna rene<t me data <one<ted as or o<rober U11,
Lam)I.— Ph. m«t<anwmmacea now �Nt witmnaace<ih<rmw boron pl---Pnmarym,� M1o.—. h<,ea,p,.p,..I,--pl—froth- CCa <o—d—d.
are e: (d-,xi below).
' - PH ssuespare definedsaz w er r vH-1.Turbiaip issues are denned as turbidity — Wp,
replaced with an adj—t well typically ending In an'A' (e.g., GWA-21) --placed with GWA-21DA).
A. [ the end of a well ID Indicates th.t the well Is an azM1 pore well.
NCDEQ. (2017, 0—r). MP 1— Natural Atte"paoo" ror -rg 1, Coawmm— m Gr—d—r. omma<e for D—lo CPRer A P, via": wr: t W Nue 1sA.0106m. NC. oml,lo" 0 water s
P:\D—Energy Cam11nast18. MARSHALgCSA UpdateJanuary 2018\Flnal 11-1 Marshall-DataI -r, summary

TABLE 13-1
SUMMARY OF Kd VALUES FROM BATCH AND COLUMN STUDIES
MARSHALL STEAM STATION
DUKE ENERGY CAROLINAS, LLC, TERRELL, NC
Batch Study
Sample Site and Depth (feet)
Arsenic
Boron
Cadmium
Chromium
Molybdenum
Selenium
Thallium
Vanadium
AB-SBR (33-35)
Trial- 1
469.0
IDNA
21.0
296.0
1897.0
898.0
108.0
2488.0
Trial - 2
460.0
IDNA
20.0
305.0
1928.0
IDNA
103.0
2469.0
AB -SS (20-25)
Trial - 1
1.0
IDNA
894.0
6.0
IDNA
IDNA
192.0
IDNA
Trial - 2
1.0
IDNA
881.0
4.0
IDNA
IDNA
224.0
IDNA
AB-2S (31-32)
Trial - 1
496.0
2.0
62.0
874.0
3346.0
1290.0
75.0
984.0
Trial - 2
496.0
IDNA
63.0
IDNA
2541.0
IDNA
76.0
IDNA
AB-413 (69.3-70.3)
Trial - 1
12.0
IDNA
108.0
IDNA
0.3
IDNA
121.0
6.0
Trial - 2
11.0
IDNA
76.0
IDNA
0.2
IDNA
86.0
6.0
AB-6BR (57.5-59)
Trial - 1
33.0
IDNA
149.0
32.0
3.0
14.0
611.0
228.0
Trial- 2
37.0
IDNA
149.0
IDNA
3.0
IDNA
678.0
238.0
AB-813 (30-32.5)
Trial- 1
343.0
IDNA
429.0
874.0
594.0
507.0
565.0
1633.0
Trial - 2
337.0
IDNA
429.0
IDNA
IDNA
IDNA
546.0
1425.0
AB-1113 (12.5-15)
Trial - 1
340.0
1.0
297.0
1334.0
36.0
84.0
1629.0
525.0
Trial - 2
356.0
IDNA
331.0
IDNA
35.0
IDNA
1860.0
547.0
AB-16D (13-15)
Trial- 1
399.0
1.0
1241.4
519.0
36.0
89.0
804.0
194.0
Trial - 2
402.0
1.0
1092.3
438.0
36.0
IDNA
795.0
191.0
AS-113 (46)
Trial - 1
52.0
IDNA
52.0
7.0
13.0
IDNA
522.0
52.0
Trial - 2
48.0
IDNA
49.0
4.0
13.0
IDNA
480.0
48.0
GWA-IS (50-52)
Trial - 1
316.0
1.0
194.0
549.0
66.0
147.0
694.0
511.0
Trial - 2
336.0
1.0
197.0
380.0
68.0
IDNA
729.0
493.0
GWA-213 (83.5 -84.5)
Trial - 1
37.0
IDNA
171.0
IDNA
1.0
IDNA
678.0
24.0
Trial - 2
34.0
IDNA
173.0
IDNA
1.0
IDNA
673.0
23.0
Geometric Mean
88.3
1.1
172.7
117.3
30.1
190.3
374.2
207.1
Median
326.0
1.0
172.0
342.5
36.0
147.0
555.5
238.0
Lower Quartile (exclusive)
1 33.8
1.0
62.8
6.8
0
84.0
117.8
48.0
Column Study
AB-1BR (33-35)
1 Trial Only
65.0
IDNA
107.0
IDNA
90.0
65.0
235.0
120.0
AB -IS (20-25)
1 Trial Only
40.0
IDNA
625.0
IDNA
IDNA
12.0
625.0
15.0
AB-25 (31-32)
1 Trial Only
60.0
IDNA
70.0
IDNA
70.0
80.0
100.0
185.0
A13-4D (69.3-70.3)
1 Trial Only
12.0
IDNA
105.0
IDNA
IDNA
7.0
110.0
12.0
A13-61311 (57.5-59)
1 Trial Only
85.0
IDNA
500.0
IDNA
NA
35.0
500.0
75.0
A13-81) (30-32.5)
1 Trial Only
90.0
IDNA
400.0
IDNA
25.0
90.0
375.0
240.0
AB-11D (12.5-15)
1 Trial Only
90.0
IDNA
275.0
IDNA
40.0
60.0
350.0
150.0
AB-12D (53.5-54)
1 Trial Only
70.0
IDNA
325.0
IDNA
25.0
40.0
425.0
100.0
AB-16D (13-15)
1 Trial Only
380.0
IDNA
400.0
IDNA
40.0
160.0
425.0
370.0
AS-11) (46)
1 Trial Only
55.0
IDNA
275.0
IDNA
15.0
15.0
300.0
60.0
GWA-1S (50-52)
1 Trial Only
85.0
IDNA
300.0
IDNA
30.0
60.0
320.0
160.0
GWA-21) (83.5-84.5)
Trial A
35.0
IDNA
120.0
IDNA
IDNA
12.0
330.0
30.0
Trial B
30.0
IDNA
160.0
IDNA
IDNA
12.0
315.0
24.0
Trial C
25.0
IDNA
150.0
IDNA
IDNA
10.0
300.0
20.0
Geometric Mean
57.4
IDNA
224.7
IDNA
36.0
30.8
303.9
69.0
Median
62.5
IDNA
275.0
IDNA
35.0
37.5
325.0
87.5
Ower Quartile (exclusive)
33.8
IDNA
116.8
IDNA
25.0
12.0
283.8
3.0
Notes: Prepared by: EMB Checked by: ALA
IDNA = isotherm data not available
Units reported in milliliters per gram (mUg)
Column Kd values are from the Soil Sorption Evaluation Report (Langley, W.G. & Oza, S., 31 Oct. 2015).
Batch sorption Kdvalues were taken from the linear isotherm (So= 0) values from the Addendum to Soil Sorption Evaluation (Langley, W.G. & Dongwook, K., 2 Feb. 2016).
AB-12D (53.5-54) was omitted from the Kd Addendum.
NA - Not analyzed
P:\Duke Energy Carolinas\38. MARSHALL\CSA Update January 2018\Final\Tables\Table 13-1 Summary of Kd Values from Batch Page 1 of 1

Table 15-1 Sampling Parameters and Analytical Methods
Analytical Method
Chemical Analyte
Bottle Requirement
Preservative
EPA 200.7
Total/Dissolved Metals - Alluminum, Barium, Boron, Calcium (total only), Iron,
Lead, Magnesium (total only), Manganese, Potassium (total only), Sodium
(total only), Strontium, Zinc
2 - 250 mL HDPE
Nitric Acid, Ice
EPA 200.8
Total/Dissolved Metals - Antimony, Arsenic, Beryllium, Cadmium, Chromium,
Cobalt, Copper, Molybdenum, Nickel, Selenium, Thallium (low level),
Vanadium (low level)
2 - 250 mL HDPE
Nitric Acid, Ice
EPA 245.1
Total/Dissolved Mercury
2 - 250 mL HDPE
Nitric Acid, Ice
EPA 300
Chloride/Sulfate
250 mL PET
Ice
EPA 350.1
Ammonia
250 mL PET
Sulfuric Acid, Ice
EPA 353.2
Nitrate/Nitrite
125 mL PET
Sulfuric Acid, Ice
RSK 175
Methane
2-20 mL VOA
Ice
SM 2540C/D
TDS/TSS
2 - 1,000 mL PET
Ice
SM 4500 - S2D
Sulfide
125 mL PET
Zinc Acetate plus Sodium Hydroxide, Ice
SM 5310B
TOC
3 - 40 mL glass VOA
Phosphoric Acid, Ice
SM2320B
Alkalinity (Total, Bicarbonate, and Carbonate)
500 mL PET
Ice
EPA 903.1 Modified
Radium 226
1 L PET
Nitric Acid, Ice
EPA 904.0/SW846 9320 Modified
Radium 228
1 L PET
Nitric Acid, Ice
SW846 6020A
Total Combined Uranium
250 mL PET
Nitric Acid, Ice
EPA 218.7
Hexavalent Chromium
125 mL PET
Sodium Hydroxide, Ice
Marshall Steam Station
Source: HDR, Corrective Action Plan Part 2 Marshall Steam Station Ash Basin, March 3, 2016
Page 1 of 1

TABLE 15-2
INTERIM MONITORING PROGRAM LIST
MARSHALL STEAM STATION
DUKE ENERGY CAROLINAS, LLC, TERRELL, NC
Wells
to be Sampled
Radionuclide Sample
Requested (X)
AB-lOBR
AB-10D
AB-10S
AB-10SL
AB-11 D
AB-11S
AB-12BR
X
AB-12D
X
AB-12S
X
AB-12SL
X
AB-13D
AB-13S
AB-14D
AB-14S
AB-15BR
AB-15D
AB-15S
AB-15SL
AB-16D
AB-16S
AB-17D
AB-17S
AB-18D
AB-18S
AB-1BR
X
AB -ID
X
AB -IS
X
AB-20D
AB-20S
AB-21 D
AB-21S
AB-2D
X
AB-2S
X
AB-3D
AB-3S
AB-4D
AB-4S
AB-4SL
AB-5BR
X
AB-5D
X
AB-5S
X
AB-6BRA
AB-6D
AB-6S
AB-7D
AB-7S
AB-8D
AB-8S
AB-9BR
AB-9D
AB-9S
AL-1BR
X
AL-1D
X
AL-1S
X
AL-2BRL
AL-2D
AL-2S
AL-3BR
AL-3D
AL-3S
AL-4BR
AL-4D
BG-1BRA
X
BG-1D
X
BG-1S
X
Wells
to be Sampled
Radionuclide Sample
Requested (X)
BG-2BR
X
BG-2S
X
BG-3BR
X
BG-3D
X
BG-3S
X
GWA-1BR
X
GWA-ID
X
GWA-IS
X
GWA-2DA
GWA-2S
GWA-3 D
GWA-3S
GWA-4D
GWA-4S
GWA-5D
GWA-5S
GWA-6D
X
GWA-6S
X
GWA-7D
GWA-7S
GWA-8D
GWA-8S
GWA-9BR
GWA-10D
GWA-SOS
GWA-11BR
X
GWA-11D
X
GWA-11S
X
GWA-12BR
X
GWA-12D
GWA-12S
X
GWA-13DA
GWA-13S
GWA-14D
GWA-14S
GWA-15S
X
MS-8
MS-10
X
MS-11
MS-13
MW-1
MW-10D
X
MW-10S
X
MW-11D
MW-11S
MW-12D
MW-12S
MW-13D
MW-13S
MW-14BR
X
MW-14D
X
MW-14S
X
MW-2
MW-3
MW-4
X
MW-4D
X
MW-5
MW-6D
X
M W-6S
X
MW-7
MW-7D
X
MW-7S
X
MW-8D
X
M W-8S
X
MW-9D
X
MW-9S
X
013-1 (Dry Ash Basin)
013-1 (Dry Ash Landfill
Prepared by: MP Checked by: 1L
P:\Duke Eneryy Carolinas\18. MARSHALL\CSA Up -January 2018\Final\Tab1es\Ta1b1e 15-2 Interim Monitoring Program Sample Locations Page 1 of 1