NC0003433_Table 6-7 Water Levels and Vertical Hydraulic Gradients_20150902

TABLE 6-7
WATER LEVELS AND VERTICAL HYDRAULIC GRADIENTS
CAPE FEAR STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, MONCURE, NC
Identification
Monitoring Zone
Total Well
Depth'
(feet bgs)
Screened
Interval
(feet bgs)
Measuring
Point TOC
(feet MSL)
Ground
Surface
(feet MSL)
Depth toPotentionmetric
Water'
(feet
BTOC
Surface Elevation
(feet MSL)
Vertical
Gradient
Direction
BACKGROUND WELLS
BGMW-04
Surficial
19
9-19
180.74
177.70
15.85
164.89
BGTMW-04
Bedrock
48
38-48
180.85
175.50
16.45
164.40
-0.016
downward
MW-09
Bedrock
20
10-20
191.78
187.30
14.2
177.58
MW-09BR
Bedrock
40
35-40
192.06
188.35
17.9
174.16
-0.153
downward
MW-15SU
Surficial
10
5-10
172.73
169.48
6.49
166.24
MW-15SL
Surficial
20
15-20
172.69
169.45
10.44
162.25
-0.389
downward
MW-15BR
Bedrock
60
55-60
172.92
169.69
9.62
163.30
0.027
upward
MW-16S
Surficial
16
6-16
168.05
165.1
3.77
164.28
downward
MW-16BR
Bedrock
51
46-51
168.55
165.35
4.62
163.93
-0.010
SOURCE AREA WELLS AND PIEZOMETERS
ABMW-01
Ash Pore Water
35
30-35
201.60
198.66
20.08
181.52
ABMW-01S
Surficial
51
46-51
201.83
198.64
28.16
173.67
-0.504
downward
ABMW-01BR
Bedrock
73
68-73
201.44
198.5
28.88
172.56
-0.054
downward
ABMW-02SU
Surficial
12
7-12
193.66
190.47
9.5
184.16
PZ-09
Surficial
22
12-22
193.82
190.82
9.7
184.12
-0.005
downward
ABMW-02SL
Surficial
30
20-30
193.64
190.59
8.88
184.76
0.043
upward
ABMW-03
Ash Pore Water
20
15-20
187.23
184.33
14.43
172.80
ABMW-03S
Surficial
37
32-37
187.17
184.26
18
169.17
-0.211
downward
ABMW-03BR
Bedrock
66
61-66
187.24
184.29
23.25
163.99
-0.180
downward
ABMW-04
Ash Pore Water
26
21-26
193.94
190.89
16.65
177.29
downward
ABMW-04S
Surficial
45
40-45
193.88
190.81
19.96
173.92
-0.218
PZ-07
Ash Pore Water
18
8-18
189.74
187.29
14.44
175.30
-
-
P:\Duke Energy Progress.1026\103. Cape Fear Ash Basin GW Assessment\1.11 CSA Reporting\Tables\Table 6-7 Water Levels and Vertical Hydraulic Gradients. xlsx Page 1 of 4

TABLE 6-7
WATER LEVELS AND VERTICAL HYDRAULIC GRADIENTS
CAPE FEAR STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, MONCURE, NC
Identification
Monitoring Zone
Total Well
Depth'
(feet bgs)
Screened
Interval
(feet bgs)
Measuring
Point TOC
(feet MSL)
Ground
Surface
(feet MSL)
Depth toPotentionmetric
Water'
(feet
BTOC
Surface Elevation
(feet MSL)
Vertical
Gradient
Direction
PZ-08
Ash Pore Water
21
11-21
193.31
193.17
17.69
175.62
-
-
PZ-10
Ash Pore Water
18
8-18
185.46
183.53
Dry
<165.53
-
-
ABMW-05
Ash Pore Water
17
12-17
186.78
183.57
Dry
<169.78
-
-
ABMW-05S
Surficial
33
28-33
186.39
183.34
25.11
161.28
downward
ABMW-05BR
Bedrock
60
55-60
186.56
183.54
25.37
161.19
-0.003
SITE WELLS AND PIEZOMETERS
CMW-01
Surficial
15
5-15
165.67
162.30
8.01
157.66
CTMW-01
Bedrock
53
38-53
166.04
163.40
7.11
158.93
0.037
upward
CMW-02
Surficial
14
4-14
169.40
166.60
10.66
158.74
CTMW-02
Bedrock
52.5
42.5-52.5
169.17
166.50
11.55
157.62
-0.028
downward
CMW-05
Surficial
20
10-20
182.44
178.60
15.24
167.20
MW-05BR
Bedrock
50
45-50
181.44
178.09
14.62
166.82
-0.012
downward
CMW-06
Surficial
14
4-14
169.89
166.60
4.46
165.43
MW-06BR
Bedrock
37.5
32.5-37.5
170.24
166.93
5.06
165.18
-0.010
downward
CMW-07
Surficial
26.5
16.5-26.5
184.58
181.50
22.07
162.51
CTMW-07
Bedrock
48
38-48
184.66
181.40
24.29
160.37
-0.090
downward
CMW-08
Surficial
15
5-15
170.21
167.70
9.17
161.04
CTMW-08
Bedrock
48.5
38.5-48.5
170.32
167.40
11.53
158.79
-0.066
downward
MW-14
Bedrock
80
70-80
173.94
171.37
11.8
162.14
0.125
upward
CMW-03
Surficial
15
5-15
175.96
172.70
15.38
160.58
MW-10
Surficial
20
10-20
173.82
170.94
13.36
160.46
-0.021
downward
MW-10D
Bedrock
35
30-35
174.29
171.1
15.44
158.85
-0.096
downward
MW-10BR
Bedrock
58
53-58
174.22
171.05
15.61
158.61
-0.011
downward
P:\Duke Energy Progress.1026\103. Cape Fear Ash Basin GW Assessment\1.11 CSA Reporting\Tables\Table 6-7 Water Levels and Vertical Hydraulic Gradients. xlsx Page 2 of 4

TABLE 6-7
WATER LEVELS AND VERTICAL HYDRAULIC GRADIENTS
CAPE FEAR STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, MONCURE, NC
Identification
Monitoring Zone
Total Well
Depth'
(feet bgs)
Screened
Interval
(feet bgs)
Measuring
Point TOC
(feet MSL)
Ground
Surface
(feet MSL)
Depth toPotentionmetric
Water'
(feet
BTOC
Surface Elevation
(feet MSL)
Vertical
Gradient
Direction
MW-11
Surficial
20
10-20
175.02
171.74
13.34
161.68
-
-
MW-12
Surficial
20
10-20
171.12
167.72
12.46
158.66
MW-12BR
Bedrock
49
44-49
170.76
167.89
11.57
159.19
0.016
upward
MW-13
Surficial
20
10-20
171.95
168.95
11.6
160.35
-
-
MW-17SU
Surficial
19
14-19
172.18
169.02
9.1
163.08
MW-17SL
Surficial
30
25-30
172.66
169.54
8.23
164.43
0.156
upward
MW-17BR
Bedrock
57
52-57
173.49
170.34
7.9
165.59
0.043
upward
MW-18S
Surficial
9.5
4.5-9.5
169.26
165.9
3.6
165.66
-
-
MW-19S
Surficial
7.8
2.8-7.8
176.91
173.83
8.38
168.53
-
-
MW-20S
Surficial
25
15-25
170.77
168.01
12.2
158.57
downward
MW-20BR
Bedrock
61
56-61
171.23
167.98
13.06
158.17
-0.010
MW-21SU
Surficial
16
11-16
176.92
173.85
10.73
166.19
MW-21SL
Surficial
29
24-29
176.96
173.88
11.68
165.28
-0.077
downward
MW-21BR
Bedrock
60
50-60
177.14
174.03
19.34
157.80
-0.255
downward
PZ-01
Surficial
13
3-13
168.0
168.2
3.42
164.58
-
-
PZ-02
Surficial
15
5-15
175.0
172.6
5.33
169.67
-
-
PZ-03S
Surficial
13
3-13
174.0
171.0
5.08
168.92
PZ-03D
Bedrock
60
45-60
173.9
171.1
4.96
168.94
0.778
upward
PZ-04
Surficial
13
3-13
173.72
170.99
8.71
165.01
-
-
PZ-05
Surficial
13
3-13
169.80
170.0
1.65
168.15
-
-
PZ-06
Surficial
33
23-33
198.03
195.47
19.16
178.87
-
-
P:\Duke Energy Progress.1026\103. Cape Fear Ash Basin GW Assessment\1.11 CSA Reporting\Tables\Table 6-7 Water Levels and Vertical Hydraulic Gradients. xlsx Page 3 of 4

TABLE 6-7
WATER LEVELS AND VERTICAL HYDRAULIC GRADIENTS
CAPE FEAR STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, MONCURE, NC
Identification
Monitoring Zone
Total Well
Depth'
(feet bgs)
Screened
Interval
(feet bgs)
Measuring
Point TOC
(feet MSL)
Ground
Surface
(feet MSL)
Depth toPotentionmetric
Water'
(feet
BTOC
Surface Elevation
(feet MSL)
Vertical
Gradient
Direction
CHATH-075-P100
Surficial*
30
20-30
175.08
175.20
14.51
160.57
-
-
CHATH-075-P101
Surficial*
20.4
10-20
184.11
184.39
22.71
161.40
-
-
CHATH-075-P102
Surficial*
25
15-25
186.66
187.01
25.91
160.75
-
-
CHATH-075-P103
Surficial*
14.6
4.6-14.6
165.51
165.78
4.43
161.08
-
-
CHATH-076-P100
Surficial*
35
25-35
168.85
169.09
2.43
166.42
-
-
CHATH-076-P101
Surficial*
15
5-15
194.56
194.87
24.15
170.41
-
-
CHATH-076-P102
Surficial*
35
25-35
195.04
195.26
28.3
166.74
-
-
CHATH-076-P103
Surficial*
15
5-15
166.72
167.07
2.4
164.32
-
-
CHATH-077-P100
Surficial*
31
21-31
194.93
195.35
29.7
165.23
-
-
CHATH-077-P102
Surficial*
30
20-30
185.72
186.03
22.09
163.63
-
-
CHATH-077-P103
Surficial*
19.5
9.5-19.5
180.31
180.67
13.49
166.82
-
-
CHATH-079-P100
Surficial*
25.4
15-25
193.03
193.35
22.32
170.71
-
-
CHATH-079-P101
Surficial*
30.4
20-30
192.94
193.29
28.63
164.31
-
-
CHATH-079-P102
Surficial*
15
5-15
173.41
173.73
7.81
165.60
-
-
CHATH-079-P103
Surficial*
30.4
20-30
193.67
193.93
28.85
164.82
-
-
CHATH-079-P104
Surficial*
30.4
20-30
193.59
193.82
27.23
166.36
-
-
CHATH-079-P105
Surficial*
15
5-15
173.08
173.40
3.44
169.64
-
-
Prepared by: CJS Checked by: TCP
Notes:
BGS - Below ground surface
BTOC - Below top of casing
MSL - Mean sea level
'Well depths and water levels measured by SynTerra, June 30 and July 1, 2015
* No boring logs available for "CHATH" piezometers, monitoring zone assigned based on depths and comparison to nearby sample locations with boring logs
P:\Duke Energy Progress.1026\103. Cape Fear Ash Basin GW Assessment\1.11 CSA Reporting\Tables\Table 6-7 Water Levels and Vertical Hydraulic Gradients.xlsx Page 4 of 4