NC0004987_2 MSS CAP Part 2 Tables_20160304

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Corrective Ation Plan Part 2
Table 2-1 Summary of Horizontal Hydraulic Gradient Calculations Marshall Steam Station Ash Basin
Well Pair
Groundwater
Elevation - Up-
gradient Well
Groundwater
Elevation - Down-
gradient Well
Flow Path
Length
Horizontal
Hydraulic
Gradient
(h1, amsl)
(h2, amsl)
(dl, ft)
(i, ft/ft)
Surficial Aquifer (S wells)
AB-3S/GWA-1S
797.81
759.71
1,528
0.025
AL-2S/AB-10S
799.90
789.10
1,056
0.010
AB-7S/AB-9S
812.39
789.70
2,111
0.011
AB-7S/AB-8S
812.39
792.07
833
0.024
GWA-4S/AB-13S
842.89
796.63
3,222
0.014
Average Horizontal Hydraulic Gradient, S Wells
0.017
Transition Zone (D wells)
AB-3D/GWA-1D
797.00
760.92
1,528
0.024
AB-6D/AB-8D
816.43
791.99
1,321
0.019
GWA-6D/AB-1 1 D
801.98
793.69
1,361
0.006
AB-16D/AB-12D
811.89
791.10
2,222
0.009
GWA-4D/AB-13D
867.72
797.10
3,222
0.022
AL-4D/AB-10D
812.41
789.08
1,694
0.014
Average Horizontal Hydraulic Gradient, D Wells
0.016
Fractured Bedrock (BR wells)
AB-5BR/GWA-1BR
799.60
763.68
2,556
0.014
AB-15BR/AB-9BR
804.62
790.59
2,528
0.006
GWA-9BR/AB-9BR
844.98
790.59
5,306
0.010
Average Horizontal Hydraulic Gradient, BR Wells
0.010
Notes:
1. Groundwater elevations measured to nearest 0.01 ft. with depth -to -water electrode
2. Groundwater elevations measured on September 28, 2015 by ERM and Pace Analytical
3. Horizontal hydraulic gradient, i = dh/dl
Page 1 of 1

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Table 2-3 Comparison of COI Sample Results using 0.45 pm and 0.1 pm Filters
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Sample Location
Sample Location
Sample Location
Sample Location
AB-10D
AB-11D
AB-12D
AB-15BR
Constituent
CAS RN
Fractio
n
Unit
0.45 µm Result
0.1 µm Result RPD %
0.45 µm Result
0.1 µm Result RPD %
0.45 µm Result
0.1 µm Result RPD %
0.45 µm Result
0.1 µm Result RPD
Aluminum
7429-90-5
D
/L
100 U
100 U
ND/NA
100 U
100 U
ND/NA
53 J
100 U
ND/NA
100 U
100 U
ND/NA
Antimony
7440-36-0
D
/L
0.5 U
0.5 U
ND/NA
0.5 U
0.5 U
ND/NA
0.193
0.313
48
0.5 U
0.5 U
ND/NA
Arsenic
7440-38-2
D
/L
0.393
0.49 J
22.73
0.13 J
0.421
105.45
2.4
2.7
11.76
0.16 J
0.16 J
0
Barium
7440-39-3
D
/L
410
400
-2.47
16
15
-6.45
140
130
-7.41
130
130
0
Beryllium
7440-41-7
D
/L
0.2 U
0.2 U
ND/NA
0.2 U
0.2 U
ND/NA
0.2 U
0.2 U
ND/NA
0.2 U
0.2 U
ND/NA
Boron
7440-42-8
D
/L
1400
1300
-7.41
50 U
50 U
ND/NA
2900
2900
0
50 U
50 U
ND/NA
Cadmium
7440-43-9
D
/L
0.08 U
0.08 U
ND/NA
0.08 U
0.08 U
ND/NA
0.08 U
0.08 U
ND/NA
0.08 U
0.08 U
ND/NA
Chromium
7440-47-3
D
/L
0.323
0.4 J
22.22
0.26 J
0.311
17.54
1.7
1.6
-6.06
0.5 U
0.25 J
ND/NA
Cobalt
7440-48-4
D
/L
6.7
6.7
0
0.13 J
0.13 J
0
0.5 U
0.5 U
ND/NA
0.5 U
0.5 U
ND/NA
Copper
7440-50-8
D
/L
l U
1.5
ND/NA
0.28 J
0.42 J
40
1 U
l U
ND/NA
1 U
0.35 J
ND/NA
Iron
7439-89-6
D
/L
1700
1700
0
50 U
50 U
ND/NA
50 U
50 U
ND/NA
2000
2000
0
Lead
7439-92-1
D
/L
0.1 U
0.0883
ND/NA
0.1 U
0.1 U
ND/NA
0.1 U
0.1 U
ND/NA
0.065 J
0.1 U
ND/NA
Manganese
7439-96-5
D
/L
2600
2800
7.41
19
20
5.13
130
130
0
290
290
0
Mercury
7439-97-6
D
/L
0.2 U
0.2 U
ND/NA
0.2 U
0.2 U
ND/NA
0.2 U
0.2 U
ND/NA
0.2 U
0.2 U
ND/NA
Molybdenum
7439-98-7
D
/L
0.96
1
4.08
1.2
1.4
15.38
0.83
1.3
44.13
1.2
1.2
0
Nickel
7440-02-0
D
/L
24.7
26
5.13
0.69
0.65
-5.97
0.92
1.1
17.82
0.5 U
0.36 J
ND/NA
Selenium
7782-49-2
D
/L
0.5 U
0.5 U
ND/NA
0.5 U
0.5 U
ND/NA
0.5 U
0.5 U
ND/NA
0.5 U
0.5 U
ND/NA
Strontium
7440-24-6
D
/L
2800
2800
0
1100
1100
0
16300
16400
0.61
1100
1100
0
Thallium
7440-28-0
D
/L
0.1 U
0.1 U
ND/NA
0.1 U
0.1 U
ND/NA
0.1 U
0.1 U
ND/NA
0.1 U
0.1 U
ND/NA
Vanadium
7440-62-2
D
/L
0.31 J
0.43 J
32.43
0.87 J
0.88 J
1.14
1.3
1.3
0
1 U
1 U
ND/NA
Zinc
7440-66-6
D
/L
10 U
2.73
ND/NA
10 U
2.63
ND/NA
10 U
10 U
ND/NA
10 U
10 U
ND/NA
Notes:
= RPD greater than 20%
pg/L = micrograms per liter
pm = micron
RPD (%) = relative percent difference
ND/NA = not detected/not applicable
D = dissolved
U = not detected
J- = estimated concentration, biased low
J = laboratory estimated concentration
J+ = estimated concentration, biased high
Page 1 of 5

Table 2-3 Comparison of COI Sample Results using 0.45 pm and 0.1 pm Filters
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Sample Location
Sample Location
Sample Location
Sample Location
AS-15D
AB-17D
AB-18D
AB-2D
Constituent
CAS RN
Fractio
n
Unit
0.45 µm Result
0.1 µm Result RPD %
0.45 µm Result
0.1 µm Result RPD %
0.45 µm Result
0.1 µm Result RPD %
0.45 µm Result
0.1 µm Result RPD
Aluminum
7429-90-5
D
/L
100 U
100 U
ND/NA
100 U
100 U
ND/NA
100 U
100 U
ND/NA
100 U
100 U
ND/NA
Antimony
7440-36-0
D
/L
0.5 U
0.5 U
ND/NA
0.5 U
0.5 U
ND/NA
0.5 U
0.5 U
ND/NA
0.5 U
0.5 U
ND/NA
Arsenic
7440-38-2
D
/L
0.133
0.13 J
0
0.2 J
0.18 J
-10.53
1.1
1.1
0
0.14 J
0.12 J
-15.38
Barium
7440-39-3
D
/L
260
260
0
28
28
0
41
42
2.41
52
53
1.9
Beryllium
7440-41-7
D
/L
0.2 U
0.2 U
ND/NA
0.2 U
0.2 U
ND/NA
0.2 U
0.2 U
ND/NA
0.2 U
0.2 U
ND/NA
Boron
7440-42-8
D
/L
26 J
26 J
0
50 U
50 U
ND/NA
50 U
50 U
ND/NA
380
380
0
Cadmium
7440-43-9
D
/L
0.08 U
0.08 U
ND/NA
0.08 U
0.08 U
ND/NA
0.08 U
0.08 U
ND/NA
0.031 J
0.056 J
57.47
Chromium
7440-47-3
D
/L
0.5 U
0.2 J
ND/NA
1
1.1
9.52
0.21 J
0.3 J
35.29
0.53
0.49 J
-7.84
Cobalt
7440-48-4
D
/L
0.5 U
0.5 U
ND/NA
0.66
0.69
4.44
0.393
0.433
9.76
0.463
0.463
0
Copper
7440-50-8
D
/L
1 U
0.87 J
ND/NA
0.24 J
0.783
105.88
1 U
0.35 J
ND/NA
0.5 J
0.69 J
31.93
Iron
7439-89-6
D
/L
2200
2300
4.44
50 U
50 U
ND/NA
65
69
5.97
71
78
9.4
Lead
7439-92-1
D
/L
0.1 U
0.1 U
ND/NA
0.1 U
0.1 U
ND/NA
0.1 U
0.1 U
ND/NA
0.065 J
0.061
-8
Manganese
7439-96-5
D
/L
240
240
0
20
18
-10.53
320
300
-6.45
54
56
3.64
Mercury
7439-97-6
D
/L
0.2 U
0.2 U
ND/NA
0.2 U
0.2 U
ND/NA
0.2 U
0.2 U
ND/NA
0.2 U
0.2 U
ND/NA
Molybdenum
7439-98-7
/L
1
1.1
9.52
0.9
0.86
-4.55
4.1
4.1
0
0.26 J
0.24 J
-8
Nickel
7440-02-0
/L
0.5 U
1.1
ND/NA
1.2
1.6
28.57
1.6
1.6
0
0.94
0.88
-6.59
Selenium
7782-49-2
t
/L
0.5 U
0.5 U
ND/NA
0.5 U
0.5 U
ND/NA
0.5 U
0.5 U
ND/NA
0.57
0.54
-5.41
Strontium
7440-24-6
/L
690
680
-1.46
120
120
0
230
230
0
720
720
0
Thallium
7440-28-0
/L
0.1 U
0.1 U
ND/NA
0.026 J
0.1 U
ND/NA
0.1 U
0.1 U
ND/NA
0.1 U
0.1 U
ND/NA
Vanadium
7440-62-2
D
/L
1 U
1 U
ND/NA
3.8
3.9
2.6
2.4
2.4
0
0.693
0.69 J
0
Zinc
7440-66-6
D
I pg/L
10 U
10 U
ND/NA
10 U
10 U
ND/NA
10 U
10 U
ND/NA
10 U
10 U
ND/NA
Notes:
= RPD greater than 20%
pg/L = micrograms per liter
pm = micron
RPD (%) = relative percent difference
ND/NA = not detected/not applicable
D = dissolved
U = not detected
J- = estimated concentration, biased low
J = laboratory estimated concentration
J+ = estimated concentration, biased high
Page 2 of 5

Table 2-3 Comparison of COI Sample Results using 0.45 pm and 0.1 pm Filters
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Sample Location
Sample Location
Sample Location
Sample Location
AB-413
AB-51311
AB-5D
AB-613R
Constituent
CAS RN
Fractio
n
Unit
0.45 µm Result
0.1 µm Result RPD %
0.45 µm Result
0.1 µm Result RPD %
0.45 µm Result
0.1 µm Result RPD %
0.45 µm Result
0.1 µm Result RPD
Aluminum
7429-90-5
D
/L
100 U
100 U
ND/NA
100 U
100 U
ND/NA
100 U
100 U
ND/NA
350
360
2.82
Antimony
7440-36-0
D
/L
0.5 U
0.5 U
ND/NA
0.5 U
0.5 U
ND/NA
0.5 U
0.5 U
ND/NA
0.68
0.66
-2.99
Arsenic
7440-38-2
D
/L
0.22 J
0.26 J
16.67
0.52
0.56
7.41
0.69
0.71
2.86
2
2.2
9.52
Barium
7440-39-3
D
/L
74
74
0
290
280
-3.51
360
350
-2.82
160
150
-6.45
Beryllium
7440-41-7
D
/L
0.0693
0.2 U
ND/NA
0.2 U
0.2 U
ND/NA
0.2 U
0.2 U
ND/NA
0.2 U
0.2 U
ND/NA
Boron
7440-42-8
D
/L
430
430
0
50 U
50 U
ND/NA
26 J
29 J
10.91
31 J
31 J
0
Cadmium
7440-43-9
D
/L
0.08 U
0.08 U
ND/NA
0.08 U
0.08 U
ND/NA
0.08 U
0.08 U
ND/NA
0.08 U
0.08 U
ND/NA
Chromium
7440-47-3
D
/L
0.2 J
0.23 J
13.95
0.3 J
0.34 J
12.5
0.24 J
0.343
34.48
0.5 U
0.65
ND/NA
Cobalt
7440-48-4
D
/L
0.383
0.373
-2.67
4.3
4.1
-4.76
8
8.7
8.38
0.223
0.243
8.7
Copper
7440-50-8
D
/L
0.58 J
1 U
ND/NA
1 U
1 U
ND/NA
1 U
1 U
ND/NA
1 U
0.47 J
ND/NA
Iron
7439-89-6
D
/L
1800
1800
0
550
520
-5.61
3200
3200
0
120
50 U
ND/NA
Lead
7439-92-1
D
/L
0.1 U
0.1 U
ND/NA
0.1 U
0.1 U
ND/NA
0.1 U
0.1 U
ND/NA
0.1 U
0.063 J
ND/NA
Manganese
7439-96-5
D
/L
81
83
2.44
350
340
-2.9
1400
1400
0
9
8.7
-3.39
Mercury
7439-97-6
D
/L
0.2 U
0.2 U
ND/NA
0.2 UJ
0.2 UJ
ND/NA
0.2 UJ
0.2 UJ
ND/NA
0.2 UJ
0.2 UJ
ND/NA
Molybdenum
7439-98-7
D
/L
0.5 U
0.5 U
ND/NA
0.39 J
0.37 J
-5.26
0.72
0.77
6.71
5.4
5.4
0
Nickel
7440-02-0
D
/L
1
0.99
-1.01
8 J+
8.3 J+
3.68
6.8 J+
7.4 J+
8.45
0.38 J+
1.5 J+
119.15
Selenium
7782-49-2
D
/L
0.5 U
0.5 U
ND/NA
0.5 U
0.5 U
ND/NA
0.5 U
0.5 U
ND/NA
0.463
0.36 J
-24.39
Strontium
7440-24-6
D
/L
250
250
0
1800
1800
0
1700
1700
0
2600
2500
-3.92
Thallium
7440-28-0
D
/L
0.1 U
0.1 U
ND/NA
0.1 U
0.1 U
ND/NA
0.1 U
0.1 U
ND/NA
0.1 U
0.1 U
ND/NA
Vanadium
7440-62-2
D
/L
1 U
1 U
ND/NA
0.35 J
1 U
ND/NA
0.511
1 U
ND/NA
2.8
3.1
10.17
Zinc
7440-66-6
D
/L
10 U
3.63
ND/NA
12
16
28.57
3.5 J
3.43
-2.9
10 U
10 U
ND/NA
Notes:
= RPD greater than 20%
pg/L = micrograms per liter
pm = micron
RPD (%) = relative percent difference
ND/NA = not detected/not applicable
D = dissolved
U = not detected
J- = estimated concentration, biased low
J = laboratory estimated concentration
J+ = estimated concentration, biased high
Page 3 of 5

Table 2-3 Comparison of COI Sample Results using 0.45 pm and 0.1 pm Filters
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Sample Location
Sample Location
Sample Location
Sample Location
AB-6D
AB-8D
AB-9611
AB-9D
Constituent
CAS RN
Fractio
n
Unit
0.45 µm Result
0.1 µm Result RPD %
0.45 µm Result
0.1 µm Result RPD %
0.45 µm Result
0.1 µm Result RPD %
0.45 µm Result
0.1 µm Result RPD
Aluminum
7429-90-5
D
/L
100 U
100 U
ND/NA
100 U
100 U
ND/NA
100 U
100 U
ND/NA
100 U
100 U
ND/NA
Antimony
7440-36-0
D
/L
0.5 U
0.5 U
ND/NA
0.5 U
0.5 U
ND/NA
0.283
0.3 J
6.9
0.5 U
0.5 U
ND/NA
Arsenic
7440-38-2
D
/L
0.42 J
0.44 J
4.65
0.39 J
0.381
-2.6
0.8
0.74
-7.79
0.8
0.87
8.38
Barium
7440-39-3
D
/L
160
160
0
110
100
-9.52
99
100
1.01
260
250
-3.92
Beryllium
7440-41-7
D
/L
0.5
0.42
-17.39
0.2 U
0.2 U
ND/NA
0.2 U
0.2 U
ND/NA
0.2 U
0.2 U
ND/NA
Boron
7440-42-8
D
/L
5500
5500
0
50 U
50 U
ND/NA
50 U
50 U
ND/NA
43 J
50 U
ND/NA
Cadmium
7440-43-9
D
/L
0.08 U
0.08 U
ND/NA
0.08 U
0.08 U
ND/NA
0.035 J
0.08 U
ND/NA
0.08 U
0.08 U
ND/NA
Chromium
7440-47-3
D
/L
0.19 J
0.29 J
41.67
0.22 J
0.5 U
ND/NA
2.5
5.6
76.54
0.5 U
0.54
ND/NA
Cobalt
7440-48-4
D
/L
1.9
1.8
-5.41
0.253
0.273
7.69
0.5 U
0.5 U
ND/NA
5.6
5.3
-5.5
Copper
7440-50-8
D
/L
1 U
0.64 J
ND/NA
1 U
1 U
ND/NA
0.33 J
0.43 J
26.32
1 U
0.451
ND/NA
Iron
7439-89-6
D
/L
5900
6100
3.33
50 U
50 U
ND/NA
50 U
50 U
ND/NA
260
250
-3.92
Lead
7439-92-1
D
/L
0.1 U
0.1 U
ND/NA
0.1 U
0.1 U
ND/NA
0.069 J
0.1 U
ND/NA
0.1 U
0.1 U
ND/NA
Manganese
7439-96-5
D
/L
600
600
0
520
510
-1.94
14
15
6.9
100
100
0
Mercury
7439-97-6
D
/L
0.2 UJ
0.2 UJ
ND/NA
0.2 U
0.2 U
ND/NA
0.2 U
0.2 U
ND/NA
0.2 U
0.2 U
ND/NA
Molybdenum
7439-98-7
D
/L
0.38 J
0.36 J
-5.41
3
2.9
-3.39
12.7
12.9
1.56
4.1
4.3
4.76
Nickel
7440-02-0
D
/L
53.3 J+
52.7 J+
-1.13
0.5 U
0.5 U
ND/NA
1
0.82
-19.78
18.2
18.3
0.55
Selenium
7782-49-2
D
/L
0.5 U
0.5 U
ND/NA
0.5 U
0.5 U
ND/NA
0.56
0.67
17.89
0.5 U
0.5 U
ND/NA
Strontium
7440-24-6
D
/L
3800
3800
0
2400
2400
0
250
260
3.92
320
310
-3.17
Thallium
7440-28-0
D
/L
0.1 U
0.1 U
ND/NA
0.1 U
0.1 U
ND/NA
0.08 J
0.054 J
-38.81
0.1 U
0.1 U
ND/NA
Vanadium
7440-62-2
D
/L
1 U
1 U
ND/NA
l U
l U
ND/NA
1.6
1.6
0
0.31 J
0.343
9.23
Zinc
7440-66-6
D
/L
10 U
10 U
ND/NA
10 U
10 U
ND/NA
10 U
10 U
ND/NA
10 U
10 U
ND/NA
Notes:
= RPD greater than 20%
pg/L = micrograms per liter
pm = micron
RPD (%) = relative percent difference
ND/NA = not detected/not applicable
D = dissolved
U = not detected
J- = estimated concentration, biased low
J = laboratory estimated concentration
J+ = estimated concentration, biased high
Page 4 of 5

Table 2-3 Comparison of COI Sample Results using 0.45 pm and 0.1 pm Filters
Sample Location
Sample Location
Sample Location
GWA-61)
MW-8D
MW-8S
Constituent
CAS RN
Fractio
n
Unit
0.45 µm Result
0.1 µm Result RPD %
0.45 µm Result
0.1 µm Result RPD %
0.45 µm Result
0.1 µm Result RPD
Aluminum
7429-90-5
D
/L
100 U
100 U
ND/NA
100 U
100 U
ND/NA
100 U
100 U
ND/NA
Antimony
7440-36-0
D
/L
0.5 U
0.5 U
ND/NA
0.5 U
0.5 U
ND/NA
0.5 U
0.5 U
ND/NA
Arsenic
7440-38-2
D
/L
0.19 J
0.23 J
19.05
0.12 J
0.5 U
ND/NA
0.14 J
0.15 J
6.9
Barium
7440-39-3
D
/L
40
40
0
15
15
0
130
120
-8
Beryllium
7440-41-7
D
/L
0.2 U
0.2 U
ND/NA
0.121
0.0973
-21.2
0.2 U
0.2 U
ND/NA
Boron
7440-42-8
D
/L
50 U
50 U
ND/NA
250
250
0
230
220
-4.44
Cadmium
7440-43-9
D
/L
0.08 U
0.08 U
ND/NA
0.08 U
0.08 U
ND/NA
0.08 U
0.031 J
ND/NA
Chromium
7440-47-3
D
/L
0.46 J
0.48 J
4.26
0.45 J
0.2 J
-76.92
0.33 J
0.22 J
-40
Cobalt
7440-48-4
D
/L
0.193
0.22 J
14.63
0.351
0.343
-2.9
1.3
1.5
14.29
Copper
7440-50-8
D
/L
0.23 J
0.25 J
8.33
0.48 J
0.61 J
23.85
0.45 J
0.23 J
-64.71
Iron
7439-89-6
D
/L
50 U
50 U
ND/NA
740
740
0
82
150
58.62
Lead
7439-92-1
D
/L
0.1 U
0.1 U
ND/NA
0.17
0.1
-51.85
0.1 U
0.1 U
ND/NA
Manganese
7439-96-5
D
/L
17
17
0
120
120
0
4800
4900
2.06
Mercury
7439-97-6
D
/L
0.2 U
0.2 U
ND/NA
0.2 U
0.2 U
ND/NA
0.2 U
0.2 U
ND/NA
Molybdenum
7439-98-7
D
/L
1.8
2
10.53
0.16 J
0.16 J
0
1.1
1
-9.52
Nickel
7440-02-0
D
/L
0.423
0.42 J
0
0.49 J
0.36 J
-30.59
1.4
1.3
-7.41
Selenium
7782-49-2
D
/L
0.5 U
0.5 U
ND/NA
0.5 U
0.5 U
ND/NA
0.493
0.423
-15.38
Strontium
7440-24-6
D
/L
530
540
1.87
1700
1700
0
1400
1400
0
Thallium
7440-28-0
D
/L
0.1 U
0.1 U
ND/NA
0.1 U
0.1 U
ND/NA
0.027 J
0.029 J
7.14
Vanadium
7440-62-2
D
/L
1.4
1.6
13.33
1 U
1 U
ND/NA
l U
1 U
ND/NA
Zinc
7440-66-6
D
/L
10 U
10 U
ND/NA
10 U
2.81
ND/NA
10 U
3.53
ND/NA
Notes:
= RPD greater than 20%
pg/L = micrograms per liter
pm = micron
RPD (%) = relative percent difference
ND/NA = not detected/not applicable
D = dissolved
U = not detected
J- = estimated concentration, biased low
J = laboratory estimated concentration
J+ = estimated concentration, biased high
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Page 5 of 5

This page intentionally left blank.

Table 2-4: Ash Porewater Analytical Results - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AB-10S
AB-10S
AB-10SL
AB-10SL
AB-12S
AB-12S
AB-12S
AB-12SL
AB-12SL
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 2
Round 1
Round 2
7/16/2015
9/28/2015
7/10/2015
9/28/2015
7/8/2015
9/29/2015
10/1/2015
7/8/2015
9/29/2015
N
N
N
N
N
N
N
N
N
AB-10S
MA-AB-10S-NS-3Q15
AB-10SL
MA-AB-10SL-NS-3Q15
AB-129
MA-AB-12S-NS-3Q15
MA-AB-12S-NS-3Q15
AB-12SL
MA-AB-12SL-NS-3Q15
Constituent
CAS RN
Fractio
n
Criteria
Min (range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
/L
50
100 U
510
73 J
190
160
130
100 U
100 U
Aluminum
7429-90-5
T
/L
6800
210
4200
330
260
170
160
540
881
Antimony
7440-36-0
D
/L
0.15
0.5 U
1.2
0.86
0.5 U
0.5 U
0.5 U
0.19 J
0.5 U
Antimony
7440-36-0
T
1
IMAC
/L
0.75
0.16 J
1.3
0.9
0.5 U
0.5 U
1 U
0.18 J
0.66
Arsenic
7440-38-2
D
/L
427J
534
1310
1280
140
220
180
3360
3920
Arsenic
7440-38-2
T
10
02L
/L
410
568
1330
1330
145
217
217
6380
4000
Barium
7440-39-3
D
/L
66
66
370
380
310
370
350
710
720
Barium
7440-39-3
T
700
02L
/L
160
70
370
420
330
380
340
780
730
Beryllium
7440-41-7
D
/L
0.23
0.2 U
0.2 U
0.2 U
0.098 J
0.2 U
0.12 J
0.2 U
0.2 U
Beryllium
7440-41-7
T
4
IMAC
/L
0.66
0.2 U
0.41
0.2 U
0.074 J
0.2 U
0.4 U
0.074 J
0.2 U
Boron
7440-42-8
D
/L
20400
26000
9500
9900
72700
76600
84200
3100
3700
Boron
7440-42-8
T
700
02L
/L
20600
27400
9400
9500
66600
79100
80300
3300
3600
Cadmium
7440-43-9
D
/L
0.12 J
0.064 J
1.1
0.096
0.08 U
0.08 U
0.08 U
0.19
0.08 U
Cadmium
7440-43-9
T
2
02L
/L
0.78
0.15
0.99
0.19
0.08 U
0.08 U
0.16 U
0.2
0.08 U
Calcium
7440-70-2
T
-
N /L
229000
283000
195000
186000
1240000
1220000
1210000
93800
101000
Chromium
7440-47-3
D
/L
0.22 J
0.23 J
0.57 J+
0.55
0.61 J+
0.19 J
0.24 J
0.33 J+
0.19 J
Chromium
7440-47-3
T
10
02L
/L
7.8
0.39 J+
3.8
0.55 J+
0.35 J
0.32 J+
0.4 J+
0.96
2 J+
Cobalt
7440-48-4
D
/L
1.6
1
2.9
3
0.25 J
0.27 J
0.25 J
0.22 J
0.14 J
Cobalt
7440-48-4
T
1
IMAC
/L
4.1
0.9
3.6
3.3
0.26 J
0.26 J
0.28 J
0.44 J
0.18 J
Copper
7440-50-8
D
/L
0.83 J
1 U
1 UJ
0.66 J
1 U
1 U
1 U
0.28 J
1 U
Copper
7440-50-8
T
1000
02L
/L
10.4
0.43 J+
4.8
2.1 J+
1 U
1 UJ
2 U
1.1
0.37 J+
Iron
7439-89-6
D
/L
6000
5000
240
230
13500
19600
18200
10300
8200
Iron
7439-89-6
T
300
02L
/L
10200
5100
2100
370
13700
20300
18000
11000
8100
Lead
7439-92-1
D
/L
0.046
0.1 U
0.078 J+
0.1 U
0.18 J+
0.1 U
0.1 U
0.081 J+
0.1 U
Lead
7439-92-1
T
15
02L
/L
6.3
0.19 J+
2.5
0.21 J+
0.056 J
0.1 UJ
0.2 U
0.72
0.32 J+
Magnesium
7439-95-4
T
/L
52100
67300
65700
69100
708000
742000
794000
32100
33900
Manganese
7439-96-5
D
/L
1400
1700
610
600
5700
7100
7500
900
820
Manganese
7439-96-5
T
50
02L
/L
1400
1800
620
620
6400
7600
7100
950
830
Mercury
7439-97-6
D
/L
0.09
0.2 U
0.2 U
0.2 U
0.11 J
0.2 U
0.2 U
0.2 U
0.2 U
Mercury
7439-97-6
T
1
02L
/L
0.07
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Methane
74-82-8
N
/L
40.3
25.2
3.3 J+
185
53.2
78.3
108 J
32100
21100
Molybdenum
7439-98-7
D
/L
2830 J+
3910
4340
4470
9.8
10.3
8
806
1090
Molybdenum
7439-98-7
T
/L
2760
3970
4510
4360
9.8
10.8
9.5
1520
1060
Nickel
7440-02-0
D
-
/L
1.7
1.5
26.6
29.4
1.3 J+
0.9
0.83
1.8 J+
2.2
Nickel
7440-02-0
T
100
02L
/L
7
1.4
24.7
31.1
1.1
0.82
1.1
2.3
2.9
Potassium
7440-09-7
T
/L
107000
140000
26500
26500
18300
21300
21200
9180
8900
Selenium
7782-49-2
D
/L
0.2
0.28 J
0.76
0.63
2.1
5 U
1.3
0.48 J
0.48 J
Selenium
7782-49-2
T
20
02L
/L
1.8
0.37 J
1.6
0.92
2.2
1.5
1.8
0.51
0.57
Sodium
7440-23-5
T
/L
87000
125000
60900
64000
30700
33400
34300 J+
2580 J
5000 U
Strontium
7440-24-6
D
/L
6400
7800
4800
6000
5500
6000
5700
3700
3900
Strontium
7440-24-6
T
/L
6500
8300
5700
6000
5600
6100
5400
4000
4100
Thallium
7440-28-0
D
/L
0.11 J+
0.096 J
0.034 J+
0.1 U
0.038 J
0.02 J
0.036 J
0.1 U
0.1 U
Thallium
7440-28-0
T
0.2
IMAC
/L
0.31
0.08 J
0.26
0.041 J
0.1 U
0.032 J
0.032 J
0.1 U
0.1 U
Vanadium
7440-62-2
D
/L
0.37 J
0.38 J
4.6
3.6
0.74 J
0.44 J
0.44 J
0.51 J
0.38 J
Vanadium
7440-62-2
T
0.3
IMAC
/L
19.4
0.78 J
12.7
4.1
1.1
0.44 J
1.1 J+
2.6
0.78 J
Zinc
7440-66-6
D
/L
7.2 J
IOU
10 U
2.6 J
10 U
10 U
3 J
10 U
10 U
Zinc
7440-66-6
T
1000
02L
/L
22 J+
3.5 J+
9.5 J
4.5 J+
3.4 J+
3.1 J+
2.5 J
10 U
3.8 J
Total Dissolved Solids
TDS
N
500000
02L
/L
1430000
1060000
1220000
577000
11600000
10100000
10500000
460000
434000
Total Organic Carbon
TOC
N
/L
720 J
660 J+
1900
1500 J+
3500
2600 J+
2900 J+
2000
1500 J+
Total Suspended Solids
TSS
N
/L
348000
15100
30200
7000
20700
40000
15500 J+
40300
24200
Alkalinity, CO3
ALK-CO3
N
/L
1000
5000 U
2900 J
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
/L
181000
243000
217000
244000
92100
125000
137000
331000
353000
Alkalinity, lab
ALK-LAB
N
/L
181000
243000
220000
244000
92100
125000
137000 J-
331000
353000
Chloride
16887-00-6
N
250000
02L
/L
7400
9400
7600
7300
3650000
3340000
3530000
27800
23600
Nitrogen, NO2 plus NO3
NO2-NO3
N
/L
10 UJ
26 J+
20 UJ
20 J+
20 UJ
21 J+
20 UJ
20 UJ
35 J+
Sulfate
14808-79-8
N
250000
02L
/L
857000
1190000
670000
650000
923000
1150000
1300000
19600
30800
Sulfide
18496-25-8
N
/L
100
100 U
100 U
100 U
100 U
100 U
100 U
100 U
100 U
Arsenic
7440-38-2
T
10
02L
/L
-
-
-
152 J+
-
-
3420 J+
-
Chromium
7440-47-3
T
10
02L
/L
2.66 J+
2.98 J+
Iron
7439-89-6
T
300
02L
/L
15600 J
7460
Manganese
7439-96-5
D
/L
7340
986
Manganese
7439-96-5
T
50
02L
/l-
7630 J
921
As III
7784-46-5
T
/L
137 J+
3350 J+
As V
10103-60-3
1 T
/L
15.1 J+
I
600 UJ
Chromium VI
18540-29-9
D
0.07
DHHS
/L
0.02 U
0.02 U
Fe II
1345-25-1
T
/L
1410 J-
2170 J-
Se IV
10102-18-8
T
/L
2 U
2 U
Se VI
13410-01-0
T
I
I
pg/L
1
2 U
2 U
Page 1 of 10

Table 2-4: Ash Porewater Analytical Results - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AB-10S
AB-10S
AB-10SL
AB-10SL
AB-12S
AB-12S
AB-12S
AB-12SL
AB-12SL
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 2
Round 1
Round 2
7/16/2015
9/28/2015
7/10/2015
9/28/2015
7/8/2015
9/29/2015
10/1/2015
7/8/2015
9/29/2015
N
N
N
N
N
N
N
N
N
AB-10S
MA-AB-10S-NS-3Q15
AB-10SL
MA-AB-10SL-NS-3Q15
AB-129
MA-AB-12S-NS-3Q15
MA-AB-12S-NS-3Q15
AB-12SL
MA-AB-12SL-NS-3Q15
Constituent
CAS RN
Fractio
n
Criteria
Min (range
onl
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Dissolved Oxygen
DO
N
m /L
0.1
0.15
0.5
0.23
0.2
0.21
0.12
0.1
0.13
Temperature
TEMP
N
-
-
Deg C
28.3
17.9
20.1
17.7
20.3
21.1
20.9
27.4
20.2
H
PH
N
6.5
8.5
02L
SU
6.9
7.18
8.2
6.13
7
7.01
7.03
7.4
7.69
Turbidity, field
TURB
N
NTU
20.8
8.36
18.4
7.64
3.5
2.87
0.37
7.3
6.43
Specific Conductivit field)
Sc
NPS/cm
2069
2670
2395
569.2
10591
11000
11735
812
858
Oxidation Reduction Potential
ORP
N
my
-107.6
-137.2
-195.4
13.6
-116.6
-213.3
-172.5
-194.9
-228.1
GW Depth TOC
GW DEPTH -TO
N
I
ft
-
13.42
13.75
5.21
1 5.15
5.2
Notes:
pm = micron
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
mg/L = milligrams per liter
my = millivolts
NTU - nephelometric turbidity units
pCi/L = picocuries per liter
SU = standard unit
J = laboratory estimated concentration
J- = estimated concentration, biased low
J+ = estimated concentration, biased high
U = results not detected at concentrations which equal the laboratory's method reporting limit
02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216
(amended effective January 2015)
02L = North Carolina groundwater standards as specified in T15A NCAC 02L
D = dissolved
Deg C = degree Celsius
DHHS = North Carolina Department of Health and Human Services
DO = dissolved oxygen
GW = groundwater
GWQS = groundwater quality standard
IMAC = Interim Maximum Allow Concentration
N = normal
NS = no standard
T = total
TDS = total dissolved solids
TOC = total organic carbon
Page 2 of 10

Table 2-4: Ash Porewater Analytical Results - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AB-13S
AB-13S
AB-14S
AB-14S
AB-15S
AB-15S
AB-15SL
AB-15SL
AB-17S
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
7/11/2015
9/28/2015
7/12/2015
9/28/2015
7/13/2015
9/28/2015
7/13/2015
9/29/2015
7/14/2015
N
N
N
N
N
N
N
N
N
AB-13S
MA-AB-13S-NS-3Q15
AB-14S
MA-AB-14S-NS-3015
AB-15S
MA-AB-15S-NS-3Q15
AB-15SL
MA-AB-15SL-NS-3Q15
AB-17S
Constituent
CAS RN
Fractio
n
Criteria
Min (range
onl
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
/L
100 U
100 U
100 U
100 U
100 U
100 U
100 U
100 U
100 U
Aluminum
7429-90-5
T
/L
1600
87 J
350
59 J
670
100 U
670
54 J
59 J
Antimony
7440-36-0
D
/L
20.7
20.9
0.63
0.5 U
0.21 J
0.17 J
0.19 J
0.5 U
0.5 U
Antimony
7440-36-0
T
1
IMAC
/L
21.8
21.7
1
0.5 U
0.18 J
0.5 U
0.25 J
0.5 U
0.5 U
Arsenic
7440-38-2
D
/L
145
339
0.19 J
873
950
784
853
632
220
Arsenic
7440-38-2
T
10
02L
wq1L
591
549
799
752
511
638
864
560
238
Barium
7440-39-3
D
/L
310
390
35
37
550
580
410
270
220
Barium
7440-39-3
T
700
02L
/L
390
390
44
36
580
580
450
240
240
Beryllium
7440-41-7
D
/L
0.2U
0.2U
0.2U
0.2U
0.2U
0.2U
0.2U
0.2U
0.2U
Beryllium
7440-41-7
T
4
IMAC
/L
0.44
0.2 U
0.58
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Boron
7440-42-8
D
/L
1100
1400
11000
11600
3300
3700
910
580
5700
Boron
7440-42-8
T
700
02L
/L
1200
1200
10500
11100
3100
3500
930
510
6000
Cadmium
7440-43-9
D
/L
0.075 J
0.11
0.08 U
0.08 U
0.8 U
0.08 U
0.08 U
0.08 U
0.08 U
Cadmium
7440-43-9
T
2
02L
wqlL
0.12
0.1
0.043 J
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 UJ
Calcium
7440-70-2
T
-
N /L
127000
140000
204000
201000
132000
140000
62300
50800
84900
Chromium
7440-47-3
D
/L
0.28 J+
0.28 J
1.4
0.2 J
5 U
0.5 U
0.24 J
0.5 U
0.34 J+
Chromium
7440-47-3
T
10
02L
/L
4 J+
0.18 J+
7.2
0.51 J+
1.1
0.25 J+
0.76
0.42 J+
0.83
Cobalt
7440-48-4
D
/L
4.1
5
0.5 U
0.5 U
3.8 J
1.3
5.9
8.3
0.76
Cobalt
7440-48-4
T
1
IMAC
/L
4.8
5.5
1
0.5 U
2.7
1.3
6.1
8.5
1
Copper
7440-50-8
D
/L
0.31 J
1 U
1.7
1 U
10 U
0.32 J
1 U
1 U
1 U
Copper
7440-50-8
T
1000
02L
/L
13.6
1 UJ
7.3
1 U
3.9
1 U
1.4
0.53 J
1 U
Iron
7439-89-6
D
/L
1500
4300
50800
59500
18400
14800
15000
13500
69900
Iron
7439-89-6
T
300
02L
/L
5400
5300
57000
55400
18600
14100
15400
12600
72800 J-
Lead
7439-92-1
D
/L
0.1 U
0.1 U
0.1 U
0.1 U
0.28
0.1 U
0.1 U
0.1 U
0.1 U
Lead
7439-92-1
T
15
02L
/L
2.2
0.1 UJ
2.8
0.054 J
0.22
0.1 U
0.32
0.12
0.046 J+
Magnesium
7439-95-4
T
/L
16100
16900
168000
171000
45800
46300
18800
14100
28400
Manganese
7439-96-5
D
/L
260
360
12800
12900
2400
2800
3200
3100
16900
Manganese
7439-96-5
T
50
02L
/L
320
380
12400
12800
2300
2700
3100
2800
17600
Mercury
7439-97-6
D
/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Mercury
7439-97-6
T
1
02L
/L
0.2 U
0.2 U
0.2 U
0.2 U
0.1 J+
0.2 U
0.089 J+
0.2 U
0.2 U
Methane
74-82-8
N
/L
2.2 J-
6.6 J+
179
199
233
450
5020
3000
3760
Molybdenum
7439-98-7
D
/L
54.9
65.9
0.15 J
2.2
19.1
9.3
31.5
26.6
4.6
Molybdenum
7439-98-7
T
/L
56.1
70.6
2.8
2.4
14.9
10.6
32.7
23.2
5
Nickel
7440-02-0
D
/L
5.3
6.1
0.4 J
0.5 U
3.1 J
0.96
0.79
0.78
0.35 J
Nickel
7440-02-0
T
100
02L
/L
6.9
6.9
2.4
0.5 U
2.1
0.87
1
0.96
0.44 J
Potassium
7440-09-7
T
/L
7690
7650
75100
73600
16600
15800
4740 J
3990 J
11800
Selenium
7782-49-2
D
/L
10.2
0.45 J
0.5 U
0.5 U
5 U
0.5 U
0.5 U
0.5 U
0.5 U
Selenium
7782-49-2
T
20
02L
/L
12.1
1.3
0.97
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
Sodium
7440-23-5
T
/L
6450
6580
88400
91400
19000
20900
8120
8910
29300
Strontium
7440-24-6
D
/L
2800
3400
3000
3800
5000
5300
1600
1200
1700
Strontium
7440-24-6
T
/L
3400
3500
3700
3700
5200
5400
1800
1000
1800
Thallium
7440-28-0
D
/L
0.78
0.59
0.1 U
0.1 U
0.11
0.039 J
0.021 J
0.033 J
0.1 U
Thallium
7440-28-0
T
0.2
IMAC
/L
1
0.71
0.24
0.1 U
0.14
0.03 J
0.044 J
0.085 J
0.1 UJ
Vanadium
7440-62-2
D
/L
8.8
7.7
0.66 J
1.1
1.1
1.1
0.38 J
0.29 J
2.1
Vanadium
7440-62-2
T
0.3
IMAC
/L
24.1
6.1
17.9
1.2
1.4
0.62 J
1.6
0.58 J
2.2
Zinc
7440-66-6
D
/L
49
10 U
48
10 U
4.4 J
IOU
2.8 J
10 U
10 U
Zinc
7440-66-6
T
1000
02L
/L
41
4.4 J+
58
10 U
10 U
10 U
3.8 J
10 U
10 U
Total Dissolved Solids
TDS
N
500000
02L
/L
485000
307000
1790000
2220000
654000
723000
308000 J
246000
620000
Total Organic Carbon
TOC
N
/L
720 J
1000 UJ
3700
850 J
2300
530 J
1100
550 J
920 J
Total Suspended Solids
TSS
N
/L
217000
13400
322000
40000
76000
32500
69000
13400
76000
Alkalinity, CO3
ALK-CO3
N
/L
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
/L
365000
405000
264000
275000
446000
482000
208000
167000
275000
Alkalinity, lab
ALK-LAB
N
/L
365000
405000
264000
275000
446000
482000
208000
167000 J-
275000
Chloride
16887-00-6
N
250000
02L
/L
1100
1500
8000
8500
8100
9400
4200
3200
9700
Nitrogen, NO2 plus NO3
NO2-NO3
N
/L
20 U
28 J+
20 U
52
20 UJ
47
20 UJ
37 J+
20 UJ
Sulfate
14808-79-8
N
250000
02L
/L
36100
38700
1180000 J+
1280000
114000
140000
33600
52200
183000
Sulfide
18496-25-8
N
/L
100 U
100 U
100 U
100 UJ
100 U
100 UJ
100 U
100 U
100 U
Arsenic
7440-38-2
T
10
02L
/L
-
-
-
-
-
-
709 J+
-
-
Chromium
7440-47-3
T
10
02L
/L
1.93
Iron
7439-89-6
T
300
02L
/L
17300
Manganese
7439-96-5
D
/L
3500
Manganese
7439-96-5
T
50
02L
/L
3630
As III
7784-46-5
T
/L
961 J+
As V
10103-60-3
T
/L
50 UJ
Chromium VI
18540-29-9
D
0.07
DHHS
/L
0.02 U
Fe II
1345-25-1
T
/L
2410 J+
Se IV
10102-18-8
T
/L
2 U
Se VI
13410-01-0
T
I
I
pg/L
2 U
Page 3 of 10

Table 2-4: Ash Porewater Analytical Results - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AB-13S
AB-13S
AB-14S
AB-14S
AB-15S
AB-15S
AB-15SL
AB-15SL
AB-17S
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
7/11/2015
9/28/2015
7/12/2015
9/28/2015
7/13/2015
9/28/2015
7/13/2015
9/29/2015
7/14/2015
N
N
N
N
N
N
N
N
N
AB-13S
MA-AB-13S-NS-3Q15
AB-14S
MA-AB-14S-NS-3015
AB-15S
MA-AB-15S-NS-3Q15
AB-15SL
MA-AB-15SL-NS-3Q15
AB-17S
Constituent
CAS RN
Fractio
n
Criteria
Min (range
oni
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Dissolved Oxygen
DO
N
m /L
0.3
0.23
1.2
0.17
0.2
0.47
0.1
0.21
0.1
Temperature
TEMP
N
-
-
Deg C
41.5
19.4
34.5
18.6
33
20.1
23.5
19
18.3
H
PH
N
6.5
8.5
02L
SU
6.8
6.83
6.4
6.36
6.8
6.82
6.9
6.67
6.6
Turbidity, field
TURB
N
-
-
NTU
7.7
4.08
9.8
8.34
6.1
4.85
30.9
8.81
8.6
Specific Conductivity field
Sc
N
P S/cm
1313
860
2495
2635
1013
1143
472.8
466.9
1022
Oxidation Reduction Potential
ORP
N
my
-93
-105.8
-79.1
-94.1
-138.8
-139.7
-119.4
-115.6
102.2
GW Depth TOC
GW DEPTH -TO
N
ft
-
27.6
17.47
16.18
23.03
Notes:
pm = micron
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
mg/L = milligrams per liter
my = millivolts
NTU - nephelometric turbidity units
pCi/L = picocuries per liter
SU = standard unit
J = laboratory estimated concentration
J- = estimated concentration, biased low
J+ = estimated concentration, biased high
U = results not detected at concentrations which equal the laboratory's method reporting limit
02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216
(amended effective January 2015)
02L = North Carolina groundwater standards as specified in T15A NCAC 02L
D = dissolved
Deg C = degree Celsius
DHHS = North Carolina Department of Health and Human Services
DO = dissolved oxygen
GW = groundwater
GWQS = groundwater quality standard
IMAC = Interim Maximum Allow Concentration
N = normal
NS = no standard
T = total
TDS = total dissolved solids
TOC = total organic carbon
Page 4 of 10

Table 2-4: Ash Porewater Analytical Results - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AB-17S
AB-18S
AB-18S
AB-20S
AB-20S
AB-21S
AB-21S
AB-3S
AB-3S
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
9/30/2015
7/14/2015
9/28/2015
7/16/2015
9/29/2015
7/15/2015
9/30/2015
7/9/2015
9/29/2015
N
N
N
N
N
N
N
N
N
MA-AB-17S-NS-3Q15
AB-18S
MA-AB-18S-NS-3Q15
AB-20S
MA-AB-20S-NS-3Q15
AB-21S
MA-AB-21S-NS-3Q15
AB-3S
MA-AB-3S-NS-3015
Constituent
CAS RN
Fractio
n
Criteria
Min (range
onl
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
/L
100 U
100 U
50 J
89 J
61 J
100 U
100 U
12400
12600
Aluminum
7429-90-5
T
/L
100 U
140
100 U
29400
28300
100 U
100 U
11800
13200
Antimony
7440-36-0
D
/L
0.5 U
0.5 U
0.17 J
27.3
27.8
0.5 U
0.5 U
0.5 U
0.5 U
Antimony
7440-36-0
T
1
IMAC
/L
0.5 U
0.5 U
0.16 J
26.6
19.2
0.5 U
0.5 U
0.5 U
0.5 U
Arsenic
7440-38-2
D
/L
266
2040
2140
33.2
32.8
379
622
1.4
1.1
Arsenic
7440-38-2
T
10
02L
wq1L
237
2060 J-
2490
95.4
178
439
556
2.3
0.91
Barium
7440-39-3
D
/L
86
320
390
24
26
1000
510
19
20
Barium
7440-39-3
T
700
02L
/L
82
340
390
460
440
630
280
20
19
Beryllium
7440-41-7
D
/L
0.2 U
0.2 U
0.2 U
0.42
0.15 J
0.2 U
0.2 U
2.3
2.3
Beryllium
7440-41-7
T
4
IMAC
/L
0.2 U
0.2 U
0.2 U
5.4
8.7
0.2 U
0.2 U
2
2.4
Boron
7440-42-8
D
/L
8900
2000
2200
42400
44000
1300
1300
260
240
Boron
7440-42-8
T
700
02L
/L
8300
2100
2000
41700
44500
1300
1100
250
220
Cadmium
7440-43-9
D
/L
1 0.08 U
0,048 J
0.08 U
2.4
6
0.08 UJ
0.08 U
0.36
0.26
Cadmium
7440-43-9
T
2
02L
/L
0.08 U
0.09 J+
0.077 J
5.3
3.7
0.08 U
0.08 U
0.36
0.23
Calcium
7440-70-2
T
-
N /L
87700
89400 J-
102000
488000
494000
35600
39400
59100
63000
Chromium
7440-47-3
D
/L
0.81
0.6 J+
0.36 J
0.32 J
1.1
0.42 J+
0.46 J
1.1 J+
0.52
Chromium
7440-47-3
T
10
02L
/L
0.36 J+
4.2
0.21 J+
71.6
618
0.53
0.27 J+
0.89
0.51 J+
Cobalt
7440-48-4
D
/L
0.22 J
0.19 J
0.2 J
473
440
3.5
3.6
14.7
8.1
Cobalt
7440-48-4
T
1
IMAC
/L
0.34 J
0.21 J
0.21 J
423
477
4.1
3.4
13.5
7.7
Copper
7440-50-8
D
/L
1 U
1 U
1 U
8
3.7
1 U
1 U
14.2 J+
11.1
Copper
7440-50-8
T
1000
02L
/L
1 U
1 U
1 U
51.9
125
1 U
1 UJ
10.8
9.6
Iron
7439-89-6
D
-
lJg/L
97200
4700
4800
25
50 U
215000
328000
33000
19400
Iron
7439-89-6
T
300
02L
/L
94300
4900
5200
12800
14000
233000
335000
32600
18400
Lead
7439-92-1
D
/L
0.1 U
0.1 U
0.1 U
1.1
0.1 U
0.053 J
0.1 U
0.14
0.13
Lead
7439-92-1
T
15
02L
/L
0.1 U
0.13 J+
0.063 J
28.7
45.3
0.1 U
0.1 U
0.12
0.14
Magnesium
7439-95-4
T
/L
33000
20500
22900
432000
426000
44900
50200
12000
12800
Manganese
7439-96-5
D
/L
18600
910
1200
8600
8800
3400
4600
600
350
Manganese
7439-96-5
T
50
02L
/L
18300
910
1100
8400
8200
3600
4300
580
340
Mercury
7439-97-6
D
/L
0.2 U
0.2 U
0.2 U
0.09
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Mercury
7439-97-6
T
1
02L
/L
0.2 U
0.2 U
0.2 UJ
0.07
0.095 J
0.2 UJ
0.2 U
0.081 J+
0.2 U
Methane
74-82-8
N
/L
6020
10600
3290
121
284
2090
2090
6.1 J+
2.2 J+
Molybdenum
7439-98-7
D
/L
5
189
209
4570
4630
1
0.83
0.52
0.33 J
Molybdenum
7439-98-7
T
/L
6.1
199
216
4490
4410
1.1
0.76
0.54
0.32 J
Nickel
7440-02-0
D
/L
0.29 J
3.2
0.98
320
361
2.9
4.6
72.3
65.9
Nickel
7440-02-0
T
100
02L
/L
0.5 U
3.2
0.91
310
624
3.7
3.8
66
62.2
Potassium
7440-09-7
T
/L
13100
6540
5880
407000
398000
29400
42800
11300
10500
Selenium
7782-49-2
D
/L
0.5 U
0.3 J
0.47 J
379
468
0.22 J
0.5 U
0.8 J+
0.5 J
Selenium
7782-49-2
T
20
02L
/L
0.5 U
0.37 J
0.5
454
368
0.23 J
0.5 U
1.8
0.36 J
Sodium
7440-23-5
T
/L
41500
5460
4080 J
264000
262000
13300
15200
7240
7380
Strontium
7440-24-6
D
/L
1900
3000
3700
10200
10000
570
430
1200
1100
Strontium
7440-24-6
T
/L
1800
3100
3600
10400
11000
520
390
1200
1100
Thallium
7440-28-0
D
/L
0.1 U
0.1 U
0.1 U
14.9
18.9
0.033 J
0.1 U
2.2
2.4
Thallium
7440-28-0
T
0.2
IMAC
/L
0.1 U
0.062 J+
0.1 U
14.8
13.5
0.1 UJ
0.1 U
2
2.2
Vanadium
7440-62-2
D
/L
1.8
0.71 J
0.56 J
71
72.4
1 U
1 U
0.78 J+
0.46 J
Vanadium
7440-62-2
T
0.3
IMAC
/L
2
1.1
0.62 J
157
239
0.29 J
1 U
0.84 J
0.4 J
Zinc
7440-66-6
D
/L
10 U
10 U
10 U
160
200
10 UJ
10 U
50
29
Zinc
7440-66-6
T
1000
02L
/L
10 U
10 U
10 U
230
200
10 U
10 U
48
25
Total Dissolved Solids
TDS
N
500000
02L
/L
727000
356000
404000
5170000
525000
1090000
1130000
660000
579000
Total Organic Carbon
TOC
N
/L
690 J
1800
970 J
500
1400
1600
1300 J-
1000 U
1000 U
Total Suspended Solids
TSS
N
/L
105000
32800
11400
1640000
1230000
111000
112000
2500 U
2500 U
Alkalinity, CO3
ALK-CO3
N
/L
5000 U
5000 U
5000 U
1000
5000 U
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
/L
220000
303000
335000
88700
86300
222000
137000
5000 U
5000 U
Alkalinity, lab
ALK-LAB
N
/L
220000
303000
335000
88700
86300
222000
137000
5000 U
5000 UJ
Chloride
16887-00-6
N
250000
02L
/L
11500
8900
8900
51500
56900
84600
124000 J-
4100
5000
Nitrogen, NO2 plus NO3
NO2-NO3
N
/L
20 U
20 UJ
24
109000 J-
104000
20 UJ
20 UJ
14 J
51 J+
Sulfate
14808-79-8
N
250000
02L
/L
275000
9100
13800
3560000
3690000
353000
491000
366000
382000
Sulfide
18496-25-8
N
/L
100 U
100 U
100 U
100
100 UJ
100 UJ
100 U
100 U
100 U
Arsenic
7440-38-2
T
10
02L
/L
-
-
-
-
-
-
-
-
-
Chromium
7440-47-3
T
10
02L
/L
Iron
7439-89-6
T
300
02L
/L
Manganese
7439-96-5
D
/L
Manganese
7439-96-5
T
50
02L
/L
As III
7784-46-5
T
/L
As V
10103-60-3
T
/L
Chromium VI
18540-29-9
D
0.07
DHHS
/L
Fe II
1345-25-1
T
/L
Se IV
10102-18-8
T
/L
Se VI
13410-01-0
T
/L
Page 5 of 10

Table 2-4: Ash Porewater Analytical Results - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AB-17S
AB-18S
AB-18S
AB-20S
AB-20S
AB-21S
AB-21S
AB-3S
AB-3S
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
9/30/2015
7/14/2015
9/28/2015
7/16/2015
9/29/2015
7/15/2015
9/30/2015
7/9/2015
9/29/2015
N
N
N
N
N
N
N
N
N
MA-AB-17S-NS-3Q15
AB-18S
MA-AB-18S-NS-3Q15
AB-20S
MA-A13-20S-NS-3Q15
AB-21S
MA-A13-21S-NS-3Q15
AB-3S
MA-AB-3S-NS-3015
Constituent
CAS RN
Fractio
n
Criteria
Min (range
oni
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Dissolved Oxygen
DO
N
m /L
0.24
0.2
0.12
2.3
0.29
2.57
0.08
1.2
0.56
Temperature
TEMP
N
Deg C
21.3
20.4
19.8
22.6
24.8
20.5
19.2
23.4
22.4
H
PH
N
6.5
8.5
02L
SU
6.47
7.5
9.55
6.8
8.33
5.9
8.31
4.3
3.86
Turbidity, field
TURB
N
-
-
NTU
2.39
6.32
5.39
358.2
-
3.22
6.66
1.3
1.17
Specific Conductivity field
Sc
N
P S/cm
1236
578
645
6062
5697
148.7
427.7
685
761
Oxidation Reduction Potential
ORP
N
my
-116.8
-142.1
-283.9
-29.7
-317.9
-34.4
-219
259.1
246
GW Depth TOC
GW DEPTH-TOC
N
ft
15.44
-
8.27
-
63.95
-
19.59
-
17.08
Notes:
pm = micron
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
mg/L = milligrams per liter
my = millivolts
NTU - nephelometric turbidity units
pCi/L = picocuries per liter
SU = standard unit
J = laboratory estimated concentration
J- = estimated concentration, biased low
J+ = estimated concentration, biased high
U = results not detected at concentrations which equal the laboratory's method reporting limit
02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216
(amended effective January 2015)
02L = North Carolina groundwater standards as specified in T15A NCAC 02L
D = dissolved
Deg C = degree Celsius
DHHS = North Carolina Department of Health and Human Services
DO = dissolved oxygen
GW = groundwater
GWQS = groundwater quality standard
IMAC = Interim Maximum Allow Concentration
N = normal
NS = no standard
T = total
TDS = total dissolved solids
TOC = total organic carbon
Page 6 of 10

Table 2-4: Ash Porewater Analytical Results - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AB-4S
AB-4S
AB-4SL
AB-4SL
AB-4SL
AB-5S
AB-5S
AB-6S
AB-6S
Round 1
Round 2
Round 1
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
7/14/2015
9/30/2015
7/9/2015
7/15/2015
9/30/2015
7/14/2015
10/1/2015
7/15/2015
10/1/2015
N
N
N
N
N
N
N
N
N
AB-4S
MA-AB-4S-NS-3Q15
AB-4SL
AB-4SL
MA-AB-4SL-NS-3Q15
AB-5S
MA-AB-5S-NS-3015
AB-6S
MA-AB-6S-NS-3015
Constituent
CAS RN
Fractio
n
Criteria
Min (range
onl
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
/L
100 U
100 U
420
280
144000
159000
77 J
100 U
Aluminum
7429-90-5
T
/L
100 U
100 U
590
280
168000
161000
460
110
Antimony
7440-36-0
D
/L
0.31 J
0.44 J
1.1
0.36 J
2.5 U
0.5 U
0.5 U
0.5 U
Antimony
7440-36-0
T
1
IMAC
/L
0.3 J
0.58
0.91
0.37 J
2.5 U
0.16 J
0.5 U
0.5 U
Arsenic
7440-38-2
D
/L
1.5
1.6
870
965
9.5
12.2
3130 J+
3260
Arsenic
7440-38-2
T
10
02L
wq1L
1.3
1.9
923
988
9.9
12.2
3180 J+
3170
Barium
7440-39-3
D
/L
73
99
88
78
10
25 U
210
200
Barium
7440-39-3
T
700
02L
/L
76
98
88
73
14 J
50 U
210
200
Beryllium
7440-41-7
D
/L
0.2 U
0.2 U
0.2 U
0.2 U
23.8
18.5
0.2 U
0.2 U
Beryllium
7440-41-7
T
4
IMAC
/L
0.2 U
0.2 U
0.2 U
0.2 U
23.5
18.9
0.2 U
0.2 U
Boron
7440-42-8
D
/L
140
190
980
800
1200
1900
6400
6600
Boron
7440-42-8
T
700
02L
/L
150
200
850
770
1500
1100 J+
6200
6300
Cadmium
7440-43-9
D
/L
0.056 J
0,046 J
0.031 J
0.025 J
3.5
3.2
0.08 UJ
0.08 U
Cadmium
7440-43-9
T
2
02L
wqlL
0.04 J+
0.05 J
0.08 U
0.08 U
3.4
3.3
0.03 J
0.08 U
Calcium
7440-70-2
T
-
N /L
12300
9320
31100
28300
347000
337000
261000
241000
Chromium
7440-47-3
D
/L
0.79 J+
0.42 J
0.66 J+
0.5 U
52.7
24.2
1.7 J+
0.37 J
Chromium
7440-47-3
T
10
02L
/L
0.66
0.28 J+
0.95
0.35 J+
53.9
25.5
0.8
0.36 J+
Cobalt
7440-48-4
D
/L
0.5 U
0.22 J
0.22 J
0.25 J
131
125
0.5 U
0.5 U
Cobalt
7440-48-4
T
1
IMAC
/L
0.5 U
0.25 J
0.31 J
0.28 J
134
130
0.16 J
0.5 U
Copper
7440-50-8
D
/L
0.28 J+
0.38 J
1 UJ
1 U
241
64
1 U
1 U
Copper
7440-50-8
T
1000
02L
/L
1 U
0.21 J
0.68 J
1 U
245
70.5
0.57 J
0.3 J+
Iron
7439-89-6
D
/L
50 U
50 U
56
30 J
1320000
2500000
2400
2400
Iron
7439-89-6
T
300
02L
/L
50 U
50 U
130
60
2300000
2480000
2500
2400
Lead
7439-92-1
D
/L
0.1 U
0.05 J
0.16
0.1 U
0.74
0.5 U
0.1 U
0.1 U
Lead
7439-92-1
T
15
02L
/L
0.1 UJ
0.072 J
0.4
0.049 J
0.52
1 U
0.38
0.079 J
Magnesium
7439-95-4
T
/L
3340
3390
5340
4890
78700
109000
52400
51500
Manganese
7439-96-5
D
/L
26
130
42
33
21300
20000
1700
1800
Manganese
7439-96-5
T
50
02L
/L
25
140
36
35
19400
20600
1700
1700
Mercury
7439-97-6
D
/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 UJ
0.2 U
0.2 UJ
Mercury
7439-97-6
T
1
02L
/L
0.2 U
0.2 U
0.072 J+
0.2 U
0.2 U
0.2 U
0.2 UJ
0.2 U
Methane
74-82-8
N
/L
10 U
20.1
10 UJ
11500
125
89.2
533
77.2
Molybdenum
7439-98-7
D
/L
2.3
3.8
62.2
59.4
2.5 U
0.1 J
40
45.2
Molybdenum
7439-98-7
T
/L
2.2
3.5
61
59.3
2.5 U
0.1 J
39.9
46
Nickel
7440-02-0
D
/L
6.5
3.8
6.6
8.3
324
275 J+
0.63
0.5 UJ
Nickel
7440-02-0
T
100
02L
/L
6.3
3.6
7.2
8.6
333
288
0.37 J
0.5 U
Potassium
7440-09-7
T
/L
3320 J
3470 J
6180
5800
5000 U
50000 U
35900
37600
Selenium
7782-49-2
D
/L
3.4
2.2
1.1 J+
0.57
3.1
14.6
0.24 J
0.5 U
Selenium
7782-49-2
T
20
02L
/L
3.3
2.1
0.73
0.61
3.3
15.8
0.4 J
0.5 U
Sodium
7440-23-5
T
/L
6010
5780
13600
13800
7850
50000 U
16500
17000
Strontium
7440-24-6
D
/L
220
160
800
750
1900
2900
6700
6700
Strontium
7440-24-6
T
/L
240
160
780
710
2300
2800
6900
6200
Thallium
7440-28-0
D
/L
0.71
0.8
0.041 J
0.1 U
0.46 J
1.4
0.1 U
0.1 U
Thallium
7440-28-0
T
0.2
IMAC
/L
0.75
0.77
0.1 U
0.016 J
0.48 J
1.4
0.024 J+
0.1 U
Vanadium
7440-62-2
D
/L
1.2
1.3
10.2
4
81.2
81.9
0.74 J
0.37 J
Vanadium
7440-62-2
T
0.3
IMAC
/L
1.1
1.4
10.9
3.6
83
83.9
1.9
0.74 J
Zinc
7440-66-6
D
/L
10 U
10 U
10 U
10 U
680
1200
4.8 J+
10 U
Zinc
7440-66-6
T
1000
02L
/L
10 U
2.8 J
2.8 J
5.1 J
890
1200
10 U
3.8 J
Total Dissolved Solids
TDS
N
500000
02L
/L
115000
81000
176000
144000
11100000
11300000
1250000
1210000
Total Organic Carbon
TOC
N
/L
1000 U
1000 U
860 J
790 J
710 J
800 J
46900 J-
1000 U
Total Suspended Solids
TSS
N
/L
2700
2800 U
10400
2800 U
3800
2600 U
19500
17200
Alkalinity, CO3
ALK-CO3
N
/L
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
/L
13300
12900
66300
70000
5000 U
5000 U
292000
248000
Alkalinity, lab
ALK-LAB
N
/L
13300
12900
66300 J+
70000
5000 U
5000 U
292000
248000
Chloride
16887-00-6
N
250000
02L
/L
7100
7600
9600
9400
47400
48100
2900
3500
Nitrogen, NO2 plus NO3
NO2-NO3
N
/L
570 J-
51
20 U
20 U
20 UJ
20 UJ
20 UJ
20 UJ
Sulfate
14808-79-8
N
250000
02L
/L
34500
29200
42500
39100
8850000
7130000
646000
635000
Sulfide
18496-25-8
N
/L
100 U
100 U
100 U
100 U
100 U
100 UJ
100 U
100 UJ
Arsenic
7440-38-2
T
10
02L
/L
2.05 J+
-
678 J+
-
-
-
-
-
Chromium
7440-47-3
T
10
02L
/L
9.81 J+
0.789 J+
Iron
7439-89-6
T
300
02L
/L
106 J+
117 J+
Manganese
7439-96-5
D
/L
25.1 J+
40.6
Manganese
7439-96-5
T
50
02L
/L
29.5 J+
41.7
As III
7784-46-5
T
/L
0.5 UJ
569 J+
As V
10103-60-3
T
/L
2.05 J+
108 J+
Chromium VI
18540-29-9
D
0.07
DHHS
/L
0.082
-
0.02 U
Fe II
1345-25-1
T
/L
30 UJ
30 U
-
Se IV
10102-18-8
T
/L
2 U
2 U
Se VI
13410-01-0
T
/L
3.31
2 U
Page 7 of 10

Table 2-4: Ash Porewater Analytical Results - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AB-4S
A13-4S
AB-4SL
AB-4SL
AB-4SL
AB-5S
AB-5S
AB-6S
AB-6S
Round 1
Round 2
Round 1
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
7/14/2015
9/30/2015
7/9/2015
7/15/2015
9/30/2015
7/14/2015
10/1/2015
7/15/2015
10/1/2015
N
N
N
N
N
N
N
N
N
AB-4S
MA-AB-4S-NS-3Q15
AB-4SL
AB-4SL
MA-A13-4SL-NS-3Q15
AB-5S
MA-AB-5S-NS-3015
AB-6S
MA-AB-6S-NS-3015
Constituent
CAS RN
Fractio
n
Criteria
Min (range
oni
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Dissolved Oxygen
DO
N
m /L
0.3
0.48
0.3
0.1
0.18
1.09
0.25
0.1
0.15
Temperature
TEMP
N
-
-
Deg C
27.2
25.83
21.8
23.3
24.14
23.2
23.8
19.3
16.8
H
PH
N
6.5
8.5
02L
SU
6
6.35
8.5
8.5
8.63
2.84
2.52
7.5
7.53
Turbidity, field
TURB
N
NTU
7.8
5.99
7.7
9.6
5.07
6.16
2.91
7.5
5.3
Specific Conductivity field
Sc
N
S/cm
140
120
289.5
277.3
240
12002
7090
1531
1544
Oxidation Reduction Potential
ORP
N
my
133.5
145.4
-122.9
-56.6
-14.2
405.8
293.4
-127.3
-217.6
GW Depth TOC
GW DEPTH -TO
N
ft
-
9.82
1 -
12.41
7.2
17.45
Notes:
pm = micron
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
mg/L = milligrams per liter
my = millivolts
NTU - nephelometric turbidity units
pCi/L = picocuries per liter
SU = standard unit
J = laboratory estimated concentration
J- = estimated concentration, biased low
J+ = estimated concentration, biased high
U = results not detected at concentrations which equal the laboratory's method reporting limit
02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216
(amended effective January 2015)
02L = North Carolina groundwater standards as specified in T15A NCAC 02L
D = dissolved
Deg C = degree Celsius
DHHS = North Carolina Department of Health and Human Services
DO = dissolved oxygen
GW = groundwater
GWQS = groundwater quality standard
IMAC = Interim Maximum Allow Concentration
N = normal
NS = no standard
T = total
TDS = total dissolved solids
TOC = total organic carbon
Page 8 of 10

Table 2-4: Ash Porewater Analytical Results - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AB-8S
AB-8S
AL-3S
AL-3S
Round 1
Round 2
Round 1
Round 2
7/15/2015
9/28/2015
7/16/2015
9/29/2015
N
N
N
N
AB-8S
MA-AB-8S-NS-3Q15
AL-3S
MA-AL-3S-NS-3Q15
Constituent
CAS RN
Fractio
n
Criteria
Min (range
onl
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
/L
100 U
74 J
180
100 U
Aluminum
7429-90-5
T
/L
1500
91 J
3800
18800
Antimony
7440-36-0
D
/L
0.5 U
0.5 U
10
9.5
Antimony
7440-36-0
T
1
IMAC
/L
0.5 U
0.5 U
12.2
18.8
Arsenic
7440-38-2
D
/L
105
86.3
26
17.2
Arsenic
7440-38-2
T
10
02L
wq1L
103
86.5
189
3850
Barium
7440-39-3
D
/L
62
61
18
21
Barium
7440-39-3
T
700
02L
/L
87
60
78
350
Beryllium
7440-41-7
D
/L
0.15 J
0.15 J
0.64
0.2 U
Beryllium
7440-41-7
T
4
IMAC
/L
0.12 J
0.11 J
1.2
3.1
Boron
7440-42-8
D
/L
810
1600
73700
80700
Boron
7440-42-8
T
700
02L
/L
790
1500
73400
79700
Cadmium
7440-43-9
D
/L
0.08 UJ
0.08 U
2.4 J
1.2
Cadmium
7440-43-9
T
2
02L
wqlL
0.08 U
0.08 U
6.3
1.4
Calcium
7440-70-2
T
-
N /L
65700
122000
475000
473000
Chromium
7440-47-3
D
/L
0.77 J+
0.27 J
0.45 J
0.21 J
Chromium
7440-47-3
T
10
02L
/L
0.7
0.44 J+
8.9
72.7
Cobalt
7440-48-4
D
/L
46.1
57.6
0.25 J
0.39 J
Cobalt
7440-48-4
T
1
IMAC
/L
45.5
57.9
4.1
11.2
Copper
7440-50-8
D
/L
1 U
0.29 J
0.21
0.27 J
Copper
7440-50-8
T
1000
02L
/L
0.56 J
1 UJ
14.4
45
Iron
7439-89-6
D
/L
46400
41100
1200
50 U
Iron
7439-89-6
T
300
02L
/L
47200
39200
5600
60800
Lead
7439-92-1
D
/L
0.1 U
0.1 U
0.046
0.1 U
Lead
7439-92-1
T
15
02L
/L
0.32
0.087 J
7.5
20.7
Magnesium
7439-95-4
T
/L
25300
38000
252000
244000
Manganese
7439-96-5
D
/L
2500
4500
220
220
Manganese
7439-96-5
T
50
02L
/L
2600
4600
240
400
Mercury
7439-97-6
D
/L
0.2 U
0.2 U
0.09
0.2 U
Mercury
7439-97-6
T
1
02L
/L
0.2 UJ
0.2 U
0.07
0.07 J
Methane
74-82-8
N
/L
288
260
195
60.8
Molybdenum
7439-98-7
D
/L
3.8
5
19800
22200
Molybdenum
7439-98-7
T
/L
3.8
5.1
20500
21900
Nickel
7440-02-0
D
/L
55.9
80.8
0.16
3.5
Nickel
7440-02-0
T
100
02L
/L
55.5
81.7
7.9
45.6
Potassium
7440-09-7
T
/L
11700
16400
374000
349000
Selenium
7782-49-2
D
/L
0.5 U
0.2 J
14.5
16
Selenium
7782-49-2
T
20
02L
/L
0.5 U
0.5 U
28.5
70.6
Sodium
7440-23-5
T
/L
11500
16400
242000
224000
Strontium
7440-24-6
D
/L
2300
3500
14600
14700
Strontium
7440-24-6
T
/L
2500
3400
14700
15800
Thallium
7440-28-0
D
/L
0.55
0.97
1.4
1.2
Thallium
7440-28-0
T
0.2
IMAC
/L
0.65
1.1
1.8
4.2
Vanadium
7440-62-2
D
/L
0.54 J
0.44 J
14.6
15.6
Vanadium
7440-62-2
T
0.3
IMAC
/L
1.5
0.43 J
163
3260
Zinc
7440-66-6
D
/L
76
69
4 J
6.8 J
Zinc
7440-66-6
T
1000
02L
/L
74
71
11 J+
86
Total Dissolved Solids
TDS
N
500000
02L
/L
628000
832000
4810000
3100000
Total Organic Carbon
TOC
N
/L
560 J
38100
750 J
1100
Total Suspended Solids
TSS
N
/L
2700
4300
44600
633000
Alkalinity, CO3
ALK-CO3
N
/L
5000 U
5000 U
1000
5000 U
Alkalinity, HCO3
ALK-HCO3
N
/L
59300
77400
102000
95500
Alkalinity, lab
ALK-LAB
N
/L
59300
77400
102000
95500
Chloride
16887-00-6
N
250000
02L
/L
2800
4700
17300
19500
Nitrogen, NO2 plus NO3
NO2-NO3
N
/L
20 UJ
46 J-
140 J-
110
Sulfate
14808-79-8
N
250000
02L
/L
368000
486000
3160000
3230000
Sulfide
18496-25-8
N
/L
100 U
100 UJ
100
100 U
Arsenic
7440-38-2
T
10
02L
/L
-
-
-
-
Chromium
7440-47-3
T
10
02L
/L
Iron
7439-89-6
T
300
02L
/L
Manganese
7439-96-5
D
/L
Manganese
7439-96-5
T
50
02L
/L
As III
7784-46-5
T
/L
As V
10103-60-3
T
/L
Chromium VI
18540-29-9
D
0.07
DHHS
/L
Fe II
1345-25-1
T
/L
Se IV
10102-18-8
T
/L
Se VI
13410-01-0
T
/L
Page 9 of 10

Table 2-4: Ash Porewater Analytical Results - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AB-8S
AB-8S
AL-3S
AL-3S
Round 1
Round 2
Round 1
Round 2
7/15/2015
9/28/2015
7/16/2015
9/29/2015
N
N
N
N
AB-8S
MA-AB-8S-NS-3Q15
AL-3S
MA-AL-3S-NS-3Q15
Constituent
CAS RN
Fractio
n
Criteria
Min (range
oni
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Dissolved Oxygen
DO
N
m /L
1.7
0.22
0.26
0.5
Temperature
TEMP
N
-
-
Deg C
25.3
20.2
27.4
23.3
H
PH
N
6.5
8.5
02L
SU
3.8
5.92
7.88
7.96
Turbidity, field
TURB
N
NTU
2.6
9.53
39.51
847
Specific Conductivity field
SC
N
P S/cm
737
1660
8308
4907
Oxidation Reduction Potential
ORP
N
my
-27.1
19.2
-183.6
-115
GW Depth TOC
GW DEPTH -TO
N
ft
-
8.29
117.91
Notes:
pm = micron
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
mg/L = milligrams per liter
my = millivolts
NTU - nephelometric turbidity units
pCi/L = picocuries per liter
SU = standard unit
J = laboratory estimated concentration
J- = estimated concentration, biased low
J+ = estimated concentration, biased high
U = results not detected at concentrations which equal the laboratory's method reporting limit
02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216
(amended effective January 2015)
02L = North Carolina groundwater standards as specified in T15A NCAC 02L
D = dissolved
Deg C = degree Celsius
DHHS = North Carolina Department of Health and Human Services
DO = dissolved oxygen
GW = groundwater
GWQS = groundwater quality standard
IMAC = Interim Maximum Allow Concentration
N = normal
NS = no standard
T = total
TDS = total dissolved solids
TOC = total organic carbon
Page 10 of 10

Table 2-5 Ash Basin Water Analytical Results - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
SW-1
SW-1
SW-2
SW-2
SW-3
SW-3
SW-4
SW-4
SW-5
SW-5
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
7/20/2015
10/1/2015
7/18/2015
10/1/2015
7/20/2015
10/1/2015
7/16/2015
10/1/2015
7/16/2015
10/1/2015
N
N
N
N
N
N
N
N
N
N
SW-1
MA-SW-1-NS-3Q15
SW-2
MA-SW-2-NS-3Q15
SW-3
MA-SW-3-NS-3Q15
SW-4
MA-SW-4-NS-3Q15
SW-5
MA-SW-5-NS-3Q15
Constituent
CAS RN
Fractio
n
Criteria
Min (range
only)
02B Class B
Water Supply
Surface Water
Criteria
Unit
Aluminum
7429-90-5
D
/L
100 U
100 U
2600
20900
13500
Aluminum
7429-90-5
T
87
/L
130
-
280
-
2700
-
20800
-
13900
Antimony
7440-36-0
D
/L
0.28 J
0.23 J
0.29 J
0.24 J
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
Antimony
7440-36-0
T
5.6
/L
0.32 J
0.23 J
0.29 J
0.26 J
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
Arsenic
7440-38-2
D
150
/L
9.3
4.9
7
7.8
13.4
7.6
6.1
15.7
5.8
8.9
Arsenic
7440-38-2
T
10
/L
11.3
8.8
11.2
13.6
24.4
8.6
4.9
17.2
7.7
8
Barium
7440-39-3
D
/L
67
87
70
89
33
31
27
28
32
34
Barium
7440-39-3
T
1000
/L
74
85
77
87
37
32
28
34
42
34
Beryllium
7440-41-7
D
6.5
/L
0.2 U
0.1 J
0.11 J
0.12 J
15.3
8
3.7
4.6
3.6
2.5
Beryllium
7440-41-7
T
/L
0.13 J
0.12 J
0.2 U
0.13 J
14.4
6.6
2.9
3.2
3
2.5
Boron
7440-42-8
D
/L
6400
8100
6600
7700
250 U
75
2000
2200
3400
2500
Boron
7440-42-8
T
/L
7000
7200
6800
6700
2500
67
2000
2000
3400
2200
Cadmium
7440-43-9
D
0.15
/L
0.08 U
0.08 U
0.026 J
0.08 U
1.5
1.1
0.43
0.51
0.45
0.37
Cadmium
7440-43-9
T
/L
0.08 U
0.08 U
0.08 U
0.08 U
1.8
1.1
0.42
0.43
0.52
0.42
Calcium
7440-70-2
T
/L
90600
104000
89400
95800
135000
54800
206000
205000
223000
154000
Chromium
7440-47-3
D
11
/L
0.58
0.32 J
0.29 J
0.34 J
0.34 J
0.22 J
6.7
7.8
6.7
5.4
Chromium
7440-47-3
T
11
/L
0.24 J
0.26 J
0.41 J
0.39 J
0.39 J
0.58
6.8
7.8
7
4.9
Cobalt
7440-48-4
D
/L
0.37 J
0.72
0.28 J
0.82
283
159
34.1
34.5
37.2
27.6
Cobalt
7440-48-4
T
3
/L
0.47 J
0.93
0.49 J
1.1
291
149
33.9
32.8
37
23.1
Copper
7440-50-8
D
2.7
/L
0.62 J+
1.1
1.9 J+
1
6.1
5.7
13.4
18.7
28.5
13.1
Copper
7440-50-8
T
/L
0.74 J
0.54 J
1.5
0.65 J
3.5
3.3
12.3
16.4
17.7
11.3
Iron
7439-89-6
D
/L
-
50 U
-
50 U
-
480
-
38300
-
27500
Iron
7439-89-6
T
1000
/L
-
300
-
520
-
530
-
37600
-
26700
Lead
7439-92-1
D
0.54
/L
0.15
0.1 U
0.052 J
0.1 U
1.5
0.44
1.4
1.6
3.4
1.4
Lead
7439-92-1
T
2.5
/L
0.058 J+
0.081 J
0.082 J
0.16
1.4
0.44 J
1.4
1.7
2.6
1.4
Magnesium
7439-95-4
T
/L
63000
71100
62100
66300
52400
23700
32200
38600
46900
36000
Manganese
7439-96-5
D
/L
400
1200
380
1200
33400
18500
3600
3800
3900
3100
Manganese
7439-96-5
T
50
/L
470
1300
520
1300
44
18500
3500
3500
3900
3000
Mercury
7439-97-6
D
/L
-
0.2 U
-
0.2 U
-
0.2 U
-
0.2 U
-
0.2 U
Mercury
7439-97-6
T
0.012
/L
0.000677
0.2 U
0.000811
0.2 U
0.000719
0.2 U
0.00422
0.2 U
0.097
0.2 U
Methane
74-82-8
N
/L
10 U
7 J+
7.3 J
1.6 J+
1.9 J
3.4 J+
2.2 J
5 J+
3.4 J
2.4 J+
Molybdenum
7439-98-7
D
/L
8.2
9.1
7.9
9.3
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.2 J
Molybdenum
7439-98-7
T
160
/L
8.4
9
8.3
8.7
0.5 U
0.5 U
0.5 U
0.24 J
0.14 J
0.25 J
Nickel
7440-02-0
D
16
/L
2.7
3.5
2.6
3.3
107
67.1
57.6
63.2
62.6
52.4
Nickel
7440-02-0
T
25
/L
2.7
3.5
2.7
3.4
115
63A
58.2
59.4
63.4
44.2
Potassium
7440-09-7
T
/L
3760 J
4920 J
3710 J
5010
25000 U
4590 J
7590
8600
9820
8050
Selenium
7782-49-2
D
/L
2.1
1.4
2
1.3
3.9
3.1
9.3
7.3
18.8
10.4
Selenium
7782-49-2
T
5
/L
2
1.5
2
1.4
33.2
10.8
6.6
8.8
18.1
10.2
Sodium
7440-23-5
T
/L
8820
10200
8580
9800
42900
19500
5550
6870
7820
8470
Strontium
7440-24-6
D
/L
530
660
540
650
1000
410
840
870
1000
730
Strontium
7440-24-6
T
14000
/L
570
650
570
630
2100
420
840
850
1000
740
Thallium
7440-28-0
D
/L
0.16
0.071 J
0.16
0.077 J
0.17
0.15
1.5
1.7
2.2
1.7
Thallium
7440-28-0
T
0.24
/L
0.16
0.065 J
0.15
0.077 J
1 U
0.14 J
1.5
1.6
2.3
1.4
Vanadium
7440-62-2
D
/L
1.2
0.8 J
0.77 J
0.91 J
1 U
1 U
1 U
1.4
1 U
0.68 J
Vanadium
7440-62-2
T
/L
1.5
11
1.8
1.6
1 U
1 U
1 U
2.5
0.64 J
0.52 J
Zinc
7440-66-6
D
36
/L
10 U
10 U
10 U
10 U
270
170
180
160
170
110
Zinc
7440-66-6
T
120
/L
10 U
2.7 J
7 J
10 U
50 U
160
150
150
160
110
Total Dissolved Solids
TDS
N
250000
/L
939000
726000
970000
804000
1290000
604000
1410000
1470000
1710000
1190000
Total Organic Carbon
TOC
N
/L
2300
1900
2300
1900
1700
1500
3600
3300
4900
4200
Total Suspended Solids
TSS
N
/L
6200
4300
5300
11600
4200
13600
6400
8600
116000
2500 U
Alkalinity, CO3
ALK-CO3
N
/L
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
/L
20000
28200
19400
25800
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
Alkalinity, lab
ALK-LAB
N
100000
/L
20000
28200
19400 J-
25800
5000 UJ
5000 UJ
5000 U
5000 UJ
5000 U
5000 UJ
Chloride
16887-00-6
N
230000
/L
231000
271000
217000
254000
20300
13000
86400J+
57600
51900
59100
Nitrogen, NO2 plus NO3
NO2-NO3
N
/L
190
140
220
110
20 U
25 J-
20 UJ
20 UJ
20 UJ
20 UJ
Sulfate
14808-79-8
N
250000
/L
107000
131000J+
128000
129000J+
694000
419000
1210000
1070000
1150000
783000
Sulfide
18496-25-8
N
/L
100 U
100 UJ
100 U
100 UJ
100 U
100 U
100 U
100 U
100 U
100 U
Arsenic
7440-38-2
T
10
/L
7.83 J+
-
-
-
0.774 J+
-
-
-
-
-
Chromium
7440-47-3
T
11
/L
0.439 J+
0.262 J+
Iron
7439-89-6
T
1000
/L
174
1370
Manganese
7439-96-5
D
/L
447
38500
Manganese
7439-96-5
T
50
/L
490
42100
As III
7784-46-5
T
/L
2.49 J+
0.5 UJ
As V
10103-60-3
T
/L
5.34 J+
0.774 J+
Chromium VI
18540-29-9
D
11
/L
0.02 U
0.02 U
Fe II
1345-25-1
T
/L
30 U
30 U
Se IV
10102-18-8
T
/L
1.36 J
2 U
Se VI
13410-01-0
T
/L
2 U
2 U
Page 1 of 2

Table 2-5 Ash Basin Water Analytical Results - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
SW-1
SW-1
SW-2
SW-2
SW-3
SW-3
SW-4
SW-4
SW-5
SW-5
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
7/20/2015
10/1/2015
7/18/2015
10/1/2015
7/20/2015
10/1/2015
7/16/2015
10/1/2015
7/16/2015
10/1/2015
N
N
N
N
N
N
N
N
N
N
SW-1
MA-SW-1-NS-3Q15
SW-2
MA-SW-2-NS-3Q15
SW-3
MA-SW-3-NS-3Q15
SW-4
MA-SW-4-NS-3Q15
SW-5
MA-SW-5-NS-3Q15
Constituent
CAS RN
Fractio
n
Criteria
Min (range
only)
02B Class B
Water Supply
Surface Water
Criteria
Unit
Dissolved Oxygen
DO
N
5.0
m /L
6.58
7.7
9.2
8.98
6.14
4.3
7
5.2
5.8
6.23
Temperature
TEMP
N
-
-
Deg C
29.9
23.2
26.7
22.6
31.4
21.8
31
21.7
31.5
23
H
PH
N
6.0
9.0
SU
7.29
7.61
6.9
8.13
3.51
3.8
2.7
2.63
2.7
2.75
Turbidity, field
TURB
N
-
25
NTU
9.04
5.32
5.4
14.1
8.14
8.45
9
33.6
65.9
12.7
Specific Conductivity field
SC
NPS/cm
1080
1172
1067
1113
1550
817
2065
2246
2402
1783
Oxidation Reduction Potential
OR P
N
my
137
254
138.9
74.7
471
412.2
555.9
481
540.8
498.1
Notes:
pm = micron
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
mg/L = milligrams per liter
my = millivolts
NTU - nephelometric turbidity units
pCi/L = picocuries per liter
SU = standard unit
J = laboratory estimated concentration
J- = estimated concentration, biased low
J+ = estimated concentration, biased high
U = results not detected at concentrations which equal the laboratory's method reporting limit
02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216
(amended effective January 2015)
02L = North Carolina groundwater standards as specified in T15A NCAC 02L
D = dissolved
Deg C = degree Celsius
DHHS = North Carolina Department of Health and Human Services
DO = dissolved oxygen
GW = groundwater
GWQS = groundwater quality standard
IMAC = Interim Maximum Allow Concentration
N = normal
NS = no standard
T = total
TDS = total dissolved solids
TOC = total organic carbon
Page 2 of 2

Table 2-6 Background Groundwater Analytical Results - Rounds 1 through 4
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
BG-1D
BG-1D
BG-1D
BG-1D
BG-1S
BG-1S
BG-1S
BG-1S
BG-2BR
Round 1
Round 2
Round 3
Round 4
Round 1
Round 2
Round 3
Round 4
Round 1
7/17/2015
9/29/2015
11/11/2015
12/11/2015
7/17/2015
9/29/2015
11/11/2015
12/11/2015
7/18/2015
N
N
N
N
N
N
N
N
N
BG-1D
MA-BG-ID-NS-3Q15
MA-BG-ID-NS-4Q15-1
MA-BG-1D-NS-4Q15-2
BG-1S
MA-BG-1S-NS-3Q15
MA-BG-lS-NS-4Q15-1
MA-BG-1S-NS-4Q15-2
BG-21BR
Constituent
CAS RN
Fractio
n
Criteria Min
(range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
/L
100 U
100 U
100 U
100 U
100 U
100 U
100 U
100 U
100 U
Aluminum
7429-90-5
T
N /L
180
100 U
250
100 U
390
91 J
560
120
3200
Antimony
7440-36-0
D
N /L
0.22 J
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
-
Antimon
7440-36-0
T
1
IMAC
/L
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
2.5 U
Arsenic
7440-38-2
D
/L
0.28 J
0.23 J
0.19 J
0.63
0.5 U
0.12 J
0.11 J
0.5 U
-
Arsenic
7440-38-2
T
10
02L
N /L
0.42 J
0.26 J
0.26 J
0.81
0.17 J
0.12 J
0.16 J
0.5 U
7.5
Barium
7440-39-3
D
-
N /L
62
74
80
88
22
23
36
29
280
Barium
7440-39-3
T
700
02L
/L
68
70
89
98
28
23
42
30
580
Beryllium
7440-41-7
D
-
u /L
0.2U
0.2U
0.2U
0.2U
0.2U
0.2U
0.2U
0.2U
-
Beryllium
7440-41-7
T
4
IMAC
p /L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.76 J
Boron
7440-42-8
D
-
p /L
50 U
50 U
50 U
50 U
50 U
46 J
30 J
50 U
50 U
Boron
7440-42-8
T
700
02L
/L
50 U
29 J+
50 U
50 U
50 U
26 J+
32 J
50 U
50 U
Cadmium
7440-43-9
D
/L
0.027 J
0.085
0.039 J
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
-
Cadmium
7440-43-9
T
2
02L
N /L
0.03 J
0.054 J
0.037 J
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.4 U
Calcium
7440-70-2
T
-
N /L
11900
11000
11400
13100
7390
6830
4380
4050
32600
Chromium
7440-47-3
D
/L
1.4
1.2
1.8
0.48 J
3.3
4.5
4
3.3
-
Chromium
7440-47-3
T
10
02L
/L
3.1
1.5 J+
2.3 J+
0.6 J+
5.7
4.8 J+
5.8
4.3
80.4
Cobalt
7440-48-4
D
-
u /L
2.9
0.95
1.1
2.6
0.66
0.39 J
0.22 J
0.2 J
-
Cobalt
7440-48-4
T
1
IMAC
N /L
3.3
0.99
1.2
3.2
1.2
0.46 J
0.45 J
0.29 J
11.9
'Copper
7440-50-8
D
/L
1.1 J+
2.2
7.2
1 U
0.43 J+
0.32 J
8.8
1.7
-
Copper
7440-50-8
T
1000
02L
/L
2
2.5
3.8
0.8 J+
0.65 J
1 U
0.78 J+
0.36 J+
137
Iron
7439-89-6
D
-
u /L
50 J
50 U
35 J
460
60
61
50 U
50 U
50 U
Iron
7439-89-6
T
300
02L
p /L
310
47 J
350
1000 J
480
97
690
130
18200
Lead
7439-92-1
D
/L
0.1 U
0.1 U
0.6
0.048 J
0.1 U
0.048 J
0.69
0.095 J
-
Lead
7439-92-1
T
15
02L
/L
0.19
0.1 U
0.11
0.1 U
0.3
0.099 J
0.24
0.082 J
17.5
Magnesium
7439-95-4
T
-
N /L
6580
7110
7210
7010
9720
9350
6010
5450
10800
Manganese
7439-96-5
D
-
N /L
44
12
19
59
140
140
8
8.5
30
Manganese
7439-96-5
T
50
1 02L
/L
54
13
23
75
160
130
17
11
380
Mercury
7439-97-6
D
/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.32 J+
Mercury
7439-97-6
T
1
02L
N /L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Methane
74-82-8
N
-
p /L
3 J
1.1 J+
1.5 J+
2.4 J+
2.6 J
9.4 J+
1.3 J+
1.4 J+
2.6 J
Molybdenum
7439-98-7
D
/L
1.4
0.85
0.68
1.1
1.2
0.76
0.5 U
0.5 U
-
Molybdenum
7439-98-7
T
/L
1.3
0.63
0.58
1.5
1.2
0.51
0.5 U
0.5 U
2.5 J
Nickel
7440-02-0
D
N /L
1 5.8
7.7
7.2
8.6
2.4
2.2
2.6
2.5
-
Nickel
7440-02-0
T
100
02L
pg/L
6.8
7.8
6.7
7.2
3.8
2.3
3.2
3
41.8
Potassium
7440-09-7
T
/L
4630 J
4980 J
4770 J
4920 J
5000 U
5000 U
5000 U
5000 U
9520
Selenium
7782-49-2
D
/L
0.67
0.62
0.67
0.48 J
0.5 U
0.5 U
0.5 U
0.5 U
-
Selenium
7782-49-2
T
20
02L
u /L
0.65
0.71
0.59
0.4 J
0.5 U
0.5 U
0.21 J
0.5 U
1.6 J
Sodium
7440-23-5
T
-
N /L
12300
9000
10000
18700
3610 J
3990 J
5000 U
5000 U
10300
Strontium
7440-24-6
D
/L
540
620
660
640
200
210
95
77
260
Strontium
7440-24-6
T
/L
580
600
660
690
210
200
99
83
360
Thallium
7440-28-0
D
N /L
0.1 U
0.018 J
0.1 U
0.016 J
0.019 J
0.023 J
0.1 U
0.1 U
-
Thallium
7440-28-0
T
0.2
IMAC
p /L
0.018 J
0.023 J
0.1 U
0.1 U
0.023 J
0.018 J
0.1 U
0.1 U
0.23 J
Vanadium
7440-62-2
D
/L
2.3
3.5
3.2
2.7
1.5
2.4
0.33 J
0.42 J
-
Vanadium
7440-62-2
T
0.3
IMAC
/L
3.5
3.4
3.1
1.4
3.8
2.8
1.6
0.93 J
100
Zinc
7440-66-6
D
-
N /L
14
5.6 J
8 J+
6.8 J
10 U
10 U
5.3 J+
11
101
Zinc
7440-66-6
T
1000
02L
N /L
17
6.8 J
14 J+
4.5 J
5.2 J
10 U
7.7 J+
10 U
68
Total Dissolved Solids
TDS
N
500000
02L
/L
142000
108000
126000
146000
114000
87000
110000
51000
369000
Total Organic Carbon
TOC
N
/L
1 1300
17300
1000 U
2900
15600
1000 U
2300
1600
1100
Total Suspended Solids
TSS
N
p /L
11300
5000 U
24300
2600 U
83000
4800
15300
2500 U
180000
Alkalinity, CO3
ALK-CO3
N
N /L
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
/L
63000
60400
65800
83400
50800
45500
8800
11200
107000
Alkalinity, lab
ALK-LAB
N
/L
63000
60400
65800
83400
50800
45500
8800
11200
107000
Chloride
16887-00-6
N
250000
02L
u /L
4800
3000
3200
4500
3500
3500
2500
2200
3400
Nitrogen, NO2 plus NO3
NO2-NO3
N
-
IJ/L
1100 J-
1100
1200
310 J+
2400 J-
2000
3900
2900
130 J-
Sulfate
14808-79-8
N
250000
02L
/L
11800
8500
11400
24200
1100
1500
10600
11100
8200
Sulfide
18496-25-8
N
/L
100 U
100 U
100 U
100 U
100 U
100 U
100 U
100 U
100 U
Arsenic
7440-38-2
T
10
02L
u /L
0.398 J+
-
-
-
0.362 J+
-
-
-
-
Chromium
7440-47-3
T
10
02L
N /L
2.47
2.9
Iron
7439-89-6
T
300
02L
/L
176 J+
111
Manganese
7439-96-5
D
/L
57.9
134
Manganese
7439-96-5
T
50
02L
N /L
51.7
153
As III
7784-46-5
T
-
N /L
0.28 J
0.5 UJ
As V
10103-60-3
T
/L
0.5 UJ
0.362 J+
Chromium VI
18540-29-9
D
0.07
DHHS
/L
0.78 J
-
-
2.8
-
-
Chromium VI
18540-29-9
T
0.07
DHHS
u /L
-
1.3
0.016 J
-
3.4
3.1
Fe II
1345-25-1
1 T
-
N /L
43 J
-
-
40 U
-
-
Se IV
10102-18-8
1 T
/L
1 2 U
1
2 U
Page 1 of 8

Table 2-6 Background Groundwater Analytical Results - Rounds 1 through 4
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
BG-1D
BG-1D
BG-1D
BG-1D
BG-1S
BG-1S
BG-1S
BG-1S
BG-2BR
Round 1
Round 2
Round 3
Round 4
Round 1
Round 2
Round 3
Round 4
Round 1
7/17/2015
9/29/2015
11/11/2015
12/11/2015
7/17/2015
9/29/2015
11/11/2015
12/11/2015
7/18/2015
N
N
N
N
N
N
N
N
N
BG-1D
MA-BG-lD-NS-3Q15
MA-BG-ID-NS-4Q15-1
MA-BG-1D-NS-4Q15-2
BG-1S
MA-BG-1S-NS-3Q15
MA-BG-lS-NS-4Q15-1
MA-BG-1S-NS-4Q15-2
BG-2BR
Constituent
CAS RN
Fractio
n
Criteria Min
(range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Se VI
13410-01-0
T
/L
0.516 J
2 U
Uranium, Natural
7440-61-1
T
p /L
0.447 J+
3.46
Radium-226
13982-63-3
T
pCi/L
9.74
4.76
Radium-228
15262-20-1
T
Ci/L
3 U
3 U
Uranium-233
13968-55-3
T
/L
0.05 U
0.05 U
Uranium-234
13966-29-5
T
p /L
0.05 U
0.05 U
Uranium-236
13982-70-2
T
p /L
0.05 U
-
0.05 U
-
-
-
Dissolved Oxygen
DO
N
m /L
2.7
2.1
3
3.46
2.41
1.9
Temperature
TEMP
N
-
-
Deg C
16.5
19.36
20.5
19.67
15.9
23.9
pH
PH
N
6.5
8.5
02L
SU
6.2
6.16
6.1
6.06
6.3
7
Turbidity, field
TURB
N
-
NTU
8.2
8.37
7.7
9.89
9
413.7
S ecific Conductivity field
SC
N
S/cm
182.3
150
134.8
110
313
223.2
Oxidation Reduction Potential
ORP
N
mV
1 0.9
205.9
4.4
203.9
136.8
-45.1
GW Depth TOC
GW_DEPTH-TOC
N
ft
I -
14.5
13.4
4.05
Notes:
pm = micron
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
mg/L = milligrams per liter
mV = millivolts
NTU - nephelometric turbidity units
pCi/L = picocuries per liter
SU = standard unit
J = laboratory estimated concentration
J- = estimated concentration, biased low
J+ = estimated concentration, biased high
U = results not detected at concentrations which equal the laboratory's method reporting limit
02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended
effective January 2015)
02L = North Carolina groundwater standards as specified in T15A NCAC 02L
D = dissolved
Deg C = degree Celsius
DHHS = North Carolina Department of Health and Human Services
DO = dissolved oxygen
GW = groundwater
GWQS = groundwater quality standard
IMAC = Interim Maximum Allow Concentration
N = normal
NS = no standard
T = total
TDS = total dissolved solids
TOC = total organic carbon
Page 2 of 8

Table 2-6 Background Groundwater Analytical Results - Rounds 1 through 4
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
BG-2BR
BG-2BR
BG-2BR
BG-2S
BG-2S
BG-2S
BG-2S
BG-3D
BG-3D
Round 2
Round 3
Round 4
Round 1
Round 2
Round 3
Round 4
Round 1
Round 2
9/29/2015
11/11/2015
12/11/2015
7/19/2015
9/28/2015
11/13/2015
12/11/2015
7/20/2015
9/28/2015
N
N
N
N
N
N
N
N
N
MA-BG-21BR-NS-3Q15
A-BG-2BR-NS-4Q15-,WA-BG-2BR-NS-4Q15-
BG-2S
MA-BG-2S-NS-3Q15
MA-BG-2S-NS-4Q15-1
MA-BG-2S-NS-4Q15-2
BG-3D
MA-BG-3D-NS-3Q15
Constituent
CAS RN
Fractio
n
Criteria Min
(range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
/L
100 U
100 U
100 U
160
92 J
100 U
84 J
100 U
100 U
Aluminum
7429-90-5
T
p /L
480
270
53 J
530
630
430
530
230
72 J
Antimony
7440-36-0
D
p /L
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
Antimony
7440-36-0
T
1
IMAC
/L
0.5 U
0.2 J
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
Arsenic
7440-38-2
D
/L
0.23 J
0.23 J
0.25 J
0.62
0.33 J
0.51
0.24 J
0.45 J
0.43 J
Arsenic
7440-38-2
T
10
02L
p /L
0.32 J
0.27 J
0.24 J
0.77
0.34 J
0.55
0.28 J
0.47 J
0.36 J
Barium
7440-39-3
D
-
p /L
360
400
360
180
260
130
240
690
810
Barium
7440-39-3
T
700
02L
/L
330
380
380
180
250
130
260
760
820
Beryllium
7440-41-7
D
/L
0.2U
0.2U
0.2U
0.2U
0.2U
0.2U
0.2U
0.2U
0.2U
Beryllium
7440-41-7
T
4
IMAC
p /L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Boron
7440-42-8
D
-
p /L
50 U
50 U
50 U
50 U
50 U
50 U
50 U
42 J
50 U
Boron
7440-42-8
T
700
02L
/L
50 U
50 U
50 U
50 U
50 U
50 U
50 U
26 J+
50 U
Cadmium
7440-43-9
D
/L
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
Cadmium
7440-43-9
T
2
02L
p /L
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
Calcium
7440-70-2
T
-
p /L
12600
15100
15000
60900
27700
22800
17300
12400
11500
Chromium
7440-47-3
D
/L
7.7
7.3
7.4
7
5.9
6.3
5.9
2.7
5.1
Chromium
7440-47-3
T
10
02L
/L
6.7
6.2
7.4
9
6.3
7.6
6.8
6.6
4.4
Cobalt
7440-48-4
D
-
p /L
0.5 U
0.5 U
0.5 U
0.5 U
0.37 J
0.75
0.5 U
1.9
0.49 J
Cobalt
7440-48-4
T
1
IMAC
p /L
1 0.23 J
0.23 J
0.5 U
0.38 J
0.57
0.86
0.22 J
1.8
0.47 J
Copper
7440-50-8
D
/L
0.39 J
2.7 J+
8.3
2.3
0.55 J
1.4
10
1.1 J+
0.38 J
Copper
7440-50-8
T
1000
02L
/L
2.5
1.5 J+
0.64 J
2
0.74 J
6.9
0.78 J
6.1
0.45 J
Iron
7439-89-6
D
-
p /L
50 U
50 U
50 U
50 U
50 U
50 U
50 U
50 U
50 U
Iron
7439-89-6
T
300
02L
p /L
410
270
40 J
140
150
360
330
250
40 J
Lead
7439-92-1
D
-
/L
0.1 U
0.27 J+
1.1
0.12 J+
0.1 U
0.094 J
1
0.1 U
0.1 U
Lead
7439-92-1
T
15
02L
/L
0.28
0.19
0.1 U
0.22
0.1
0.3
0.2
0.26 J+
0.051 J
Magnesium
7439-95-4
T
-
p /L
8980
9450
9340
3740
7480
4680
5770
13700
14900
Manganese
7439-96-5
D
-
p /L
5.1
5.3
5 U
7.4
16
4.3 J
4.2 J
21
9.3
Manganese
7439-96-5
T
50
02L
/L
19
13
5 U
20
25
7
6.5
24
11
Mercury
7439-97-6
D
/L
0.2 U
0.2 U
0.2 U
0.14 J
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Mercury
7439-97-6
T
1
02L
p /L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Methane
74-82-8
N
-
p /L
1.2 J+
1.3 J+
1.2 J+
2.6 J
2.8 J+
1.2 J+
2.1 J+
1.2 J
1.8 J+
Molybdenum
7439-98-7
D
/L
0.18 J
0.21 J
0.24 J
3.4
1.5
1.2
0.6
1.1
0.42 J
Molybdenum
7439-98-7
T
/L
0.14 J
0.24 J
0.26 J
4.9
1.3
1.6
0.61
3.2
0.38 J
Nickel
7440-02-0
D
p /L
1.2
1
0.91
0.56
1
0.84
1.6
7.3
7.1
Nickel
7440-02-0
T
100
02L
p /L
1.3
0.9
0.82
1.3
1.4
1.4
2.1
7.9
6.2
Potassium
7440-09-7
T
/L
5520
5800
5760
9660
4620 J
3070 J
3140 J
12200
8270
Selenium
7782-49-2
D
/L
0.5 U
0.5 U
0.5 U
0.49 J
0.3 J
0.29 J
0.26 J
0.5 U
0.5 U
Selenium
7782-49-2
T
-
20
02L
p /L
0.5 U
0.21 J
0.5 U
0.5 J
0.24 J
0.27 J
0.31 J
0.37 J
0.5 U
Sodium
7440-23-5
T
p /L
7420
7840
7610
12400
10600
6890
7830
16000
15100
Strontium
7440-24-6
D
/L
230
250
230
270
240
160
160
160
170
Strontium
7440-24-6
T
/L
1 220
260
240
340
240
170
180
180
180
Thallium
7440-28-0
D
p /L
0.1 U
0.1 U
0.1 U
0.02 J
0.1 U
0.1 U
0.1 U
0.1 U
0.1 U
Thallium
7440-28-0
T
0.2
IMAC
p /L
0.1 U
0.1 U
0.1 U
0.021 J
0.017 J
0.1 U
0.1 U
0.021 J
0.1 U
Vanadium
7440-62-2
D
/L
14.3
14.3
14.3
23.8
14.6
16.8
13.1
21.6
25
Vanadium
7440-62-2
T
0.3
IMAC
/L
13.3
12.1
14.1
44
14.5
17.8
14
21.9
22.1
Zinc
7440-66-6
D
-
p /L
10 U
8.3 J+
3.5 J
2.7 J
10 U
3.6 J
5 J
5.1 J
IOU
Zinc
7440-66-6
T
1000
02L
p /L
5.4 J+
16 J+
6.8 J
10 U
3.1 J+
3.1 J+
20
11
3 J+
Total Dissolved Solids
TDS
N
500000
02L
/L
1 131000
182000
137000
178000
174000
147000
120000
183000
194000
Total Organic Carbon
TOC
N
/L
1000 U
1000 U
1000 U
810 J
1000 U
730 J
650 J
670 J
1000 U
Total Suspended Solids
TSS
N
p /L
2500 U
10000
2500 U
4900
7900
5500
2500 U
15100
2500 U
Alkalinity, CO3
ALK-CO3
N
p /L
5000 U
5000 U
5000 U
42900
5000 U
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
/L
81600
87700
89800
61200
103000
78300
77900
95200
103000
Alkalinity, lab
ALK-LAB
N
/L
81600 J-
87700
89800
104000
103000 J-
78300
77900
95200
103000 J-
Chloride
16887-00-6
N
250000
02L
p /L
2400
2600
2600
2700
3100
2200
2300
3500
3000
Nitrogen, NO2 plus NO3
NO2-NO3
N
-
p /L
240
240
250
250
300
370
400
330
380
Sulfate
14808-79-8
N
250000
02L
/L
2200
3000
2700
9100
8200
9500
6800
16000
12600
Sulfide
18496-25-8
N
/L
100 U
100 U
100 U
100 U
100 U
100 U
100 U
100 U
100 U
Arsenic
7440-38-2
T
10
02L
p /L
-
-
-
-
-
-
-
-
-
Chromium
7440-47-3
T
10
02L
p /L
Iron
7439-89-6
T
300
02L
/L
Man anese
7439-96-5
D
/L
Man anese
7439-96-5
T
50
02L
p /L
As(III)
7784-46-5
T
-
pg/L
As V
10103-60-3
T
/L
Chromium VI
18540-29-9
D
0.07
DHHS
/L
-
-
-
-
Chromium (VI)
18540-29-9
T
0.07
DHHS
p /L
6
7.6
6.1
6.3
Fe(II)
1345-25-1
T
-
p /L
-
-
-
-
Se IV
10102-18-8
T
/L
Page 3 of 8

Table 2-6 Background Groundwater Analytical Results - Rounds 1 through 4
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
BG-2BR
BG-2BR
BG-2BR
BG-2S
BG-2S
BG-2S
BG-2S
BG-3D
BG-3D
Round 2
Round 3
Round 4
Round 1
Round 2
Round 3
Round 4
Round 1
Round 2
9/29/2015
11/11/2015
12/11/2015
7/19/2015
9/28/2015
11/13/2015
12/11/2015
7/20/2015
9/28/2015
N
N
N
N
N
N
N
N
N
MA-BG-2BR-NS-3Q15
A-BG-2BR-NS-4Q15-,WA-BG-2BR-NS-4Q15-
BG-2S
MA-BG-2S-NS-3Q15
MA-BG-2S-NS-4Q15-1
MA-BG-2S-NS-4Q15-2
BG-3D
MA-BG-3D-NS-3Q15
Constituent
CAS RN
Fractio
n
Criteria Min
(range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Se VI
13410-01-0
T
/L
Uranium, Natural
7440-61-1
T
p /L
Radium-226
13982-63-3
T
pCi/L
Radium-228
15262-20-1
T
Ci/L
Uranium-233
13968-55-3
T
/L
Uranium-234
13966-29-5
T
p /L
Uranium-236
13982-70-2
T
p /L
-
-
-
-
-
-
-
-
-
Dissolved Oxygen
DO
N
m /L
3.39
3.2
3.12
3.5
2
10.3
3.29
4.9
4.78
Temperature
TEMP
N
-
-
Deg C
18.9
15.8
15.8
24.4
20.58
18.7
17.4
24.9
18.55
pH
PH
N
6.5
8.5
02L
SU
6.84
6.9
6.83
10.9
7.27
7.2
6.64
6.5
6.53
Turbidity, field
TURB
N
-
NTU
9.97
9.4
1.14
9.6
12.2
8.9
7.9
6.2
8.38
,Specific Conductivity field
SC
NPS/cm
1 150
183.3
204.2
388.3
200
186.7
184.2
254.5
220
Oxidation Reduction Potential
ORP
N
mV
1 207.5
156.6
157.4
-20.5
0.2
137.1
156.4
153.5
192.6
GW Depth TOC
GW_DEPTH-TOC
N
ft
1 10
7.85
7.8
5.1
Notes:
pm = micron
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
mg/L = milligrams per liter
mV = millivolts
NTU - nephelometric turbidity units
pCi/L = picocuries per liter
SU = standard unit
J = laboratory estimated concentration
J- = estimated concentration, biased low
J+ = estimated concentration, biased high
U = results not detected at concentrations which equal the laboratory's method reporting limit
02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended
effective January 2015)
02L = North Carolina groundwater standards as specified in T15A NCAC 02L
D = dissolved
Deg C = degree Celsius
DHHS = North Carolina Department of Health and Human Services
DO = dissolved oxygen
GW = groundwater
GWQS = groundwater quality standard
IMAC = Interim Maximum Allow Concentration
N = normal
NS = no standard
T = total
TDS = total dissolved solids
TOC = total organic carbon
Page 4 of 8

Table 2-6 Background Groundwater Analytical Results - Rounds 1 through 4
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
BG-3D
BG-3D
BG-3S
BG-3S
BG-3S
BG-3S
MS-10
MW-4
MW-4
Round 3
Round 4
Round 1
Round 2
Round 3
Round 4
Round 4
Round 1
Round 2
11/11/2015
12/11/2015
7/18/2015
9/28/2015
11/13/2015
12/21/2015
12/21/2015
7/10/2015
9/30/2015
N
N
N
N
N
N
N
N
N
MA-BG-3D-NS-4Q15-1
MA-BG-3D-NS-4Q15-2
BG-3S
MA-BG-3S-NS-3Q15
MA-BG-3S-NS-4Q15-1
MA-BG-3S-NS-4Q15-2
MA-MS-10-NS-4Q15-2
MW-4
MA-MW-4-NS-3Q15
Constituent
CAS RN
Fractio
n
Criteria Min
(range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
/L
100 U
100 U
100 U
100 U
100 U
2600
100 U
100 U
100 U
Aluminum
7429-90-5
T
p /L
100 U
100 U
2800
4200
8300
14200
320
450
1000
Antimony
7440-36-0
D
p /L
0.5 U
0.5 U
0.5 U
0.16 J
5
0.5 U
0.5 U
0.51
0.44 J
Antimony
7440-36-0
T
1
IMAC
/L
0.5 U
0.5 U
1
0.17 J
2.4
0.26 J
0.5 U
2.5 U
0.51
Arsenic
7440-38-2
D
/L
0.36 J
0.41 J
0.24 J
0.28 J
0.34 J
0.44 J
0.5 U
874
0.5 U
Arsenic
7440-38-2
T
10
02L
Ea /L
0.32 J
0.39 J
0.48 J
0.4 J
0.75
1
0.16 J
2.5 U
0.14 J
Barium
7440-39-3
D
-
N /L
870
810
530
550
490
740
140
41
44
Barium
7440-39-3
T
700
02L
/L
880
820
660
750
1100
1300
150
48
58
Beryllium
7440-41-7
D
/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.26
0.15 J
0.2 U
0.2 U
Beryllium
7440-41-7
T
4
IMAC
u /L
0.2 U
0.2 U
0.2 U
0.2 U
0.11 J
0.74
0.21
1 U
0.12 J
Boron
7440-42-8
D
-
N /L
50 U
50 U
50 U
50 U
50 U
50 U
50 U
50 UJ
50 U
Boron
7440-42-8
T
700
02L
/L
50 U
50 U
50 U
50 U
50 U
50 U
50 U
50 U
50 U
Cadmium
7440-43-9
D
/L
0.08 U
0.08 U
0.08 U
0.08 U
0.048 J
0.08 U
0.08 U
0.08 U
0.08 U
Cadmium
7440-43-9
T
2
02L
N /L
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.029 J
0.08 U
0.4 U
0.08 U
Calcium
7440-70-2
T
-
N /L
10700
11100
9260
8930
9690
9790
246
3080
3740
Chromium
7440-47-3
D
/L
4.2
2.2
3.1
5.8
7.5
77.8
0.77 J+
0.24 J+
1.8
Chromium
7440-47-3
T
10
02L
/L
4.1
2
73.7
56.7
183
356
1.2 J+
2.5 J
5.7
Cobalt
7440-48-4
D
-
p /L
0.22 J
0.23 J
0.97
0.24 J
0.49 J
4.4
0.63
0.5 U
0.5 U
Cobalt
7440-48-4
T
1
IMAC
N /L
0.24 J
0.24 J
5
3.8
10.8
17.8
0.76
2.5 U
0.51
Copper
7440-50-8
D
/L
1 0.29 J+
8.5
1.9 J+
1 U
9.5
21.6
5.3
1 UJ
5.2
Copper
7440-50-8
T
1000
02L
/L
0.66 J+
0.28 J
9.4
8.1
23A
87.4
0.5 J
6.8
8.6
Iron
7439-89-6
D
-
N /L
50 U
50 U
50 U
50 U
50 U
2400
50 U
50 U
50 U
Iron
7439-89-6
T
300
02L
p /L
60
50 U
3400
4900
9100
16500
420
510
1400
Lead
7439-92-1
D
/L
0.046 J+
0.91
0.087 J+
0.1 U
1.2
0.5
0.63
0.086 J+
0.1 U
Lead
7439-92-1
T
15
02L
/L
0.1 U
0.1 U
0.48
0.54
1.4
2
0.33
0.78
0.78
Magnesium
7439-95-4
T
-
u /L
14400
14500
13900
15400
18200
22100
426
642
810
Manganese
7439-96-5
D
-
N /L
6.7
13
120
25
27
53
22
9.2
8.8
Manganese
7439-96-5
T
50
02L
/L
6.9
12
180
77
120
190
34
19
34
Mercury
7439-97-6
D
/L
0.2 U
0.2 U
0.26 J+
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Mercury
7439-97-6
T
1
02L
N /L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Methane
74-82-8
N
-
p /L
0.73 J+
1.5 J+
2.3 J+
2.2 J+
1.2 J+
2.2 J+
1.5 J+
1.9 J+
1.3 J+
Molybdenum
7439-98-7
D
/L
0.36 J
0.26 J
3.2
1.6
0.89
1.6
0.5 U
2.6 J+
0.14 J
Molybdenum
7439-98-7
T
/L
0.31 J
0.26 J
2.4
1.2
0.92
3.5
0.5 U
2.5 UJ
0.2 J
Nickel
7440-02-0
D
-
p /L
6
6.4
8.9
9.4
8.8
54.5
1.6
0.34 J
1.2
Nickel
7440-02-0
T
100
02L
N /L
5.7
6.2
49.6
44.2
116
221
1.6
2.5 U
3
Potassium
7440-09-7
T
/L
7600
8000
6450
6960
7720
9590
5000 U
5000 U
5000 U
Selenium
7782-49-2
D
/L
0.5 U
0.5 U
0.5 U
0.32 J
0.39 J
0.6
0.5 U
0.46 J
0.5 U
Selenium
7782-49-2
T
20
02L
Ea /L
0.5 U
0.5 U
0.5 U
0.44 J
0.43 J
0.7
0.5 U
2.5 U
0.5 U
Sodium
7440-23-5
T
-
N /L
13900
15700
8480
9040
8670
8670
5000 U
3870 J
4370 J
Strontium
7440-24-6
D
/L
180
160
190
170
160
190
22
73
83
Strontium
7440-24-6
T
/L
180
170
190
180
210
210
22
78
87
Thallium
7440-28-0
D
-
Ea /L
0.1 U
0.1 U
0.1 U
0.1 U
0.058 J
0.086 J+
0.024 J+
0.072 J+
0.03 J
Thallium
7440-28-0
T
0.2
IMAC
N /L
0.1 U
0.1 U
0.072 J
0.064 J
0.21
0.31
0.1 U
0.5 U
0.032 J
Vanadium
7440-62-2
D
/L
24.5
24.1
5.3
5.9
6.4
16.3
0.47 J
1.6
0.72 J
Vanadium
7440-62-2
T
0.3
IMAC
/L
21.9
23.8
14.4
12.4
30.9
58.8
1.5 J+
2.2 J
3.9
Zinc
7440-66-6
D
-
u /L
2.7 J+
4.1 J
14
10 U
280
62
10
5 J+
37
Zinc
7440-66-6
T
1000
02L
N /L
2.8 J+
2.8 J
15
13 J+
170
110
11
10 U
49
Total Dissolved Solids
TDS
N
500000
02L
/L
1 248000
177000
161000 J
172000
169000
199000
25000 U
42000 J+
53000
Total Organic Carbon
TOC
N
/L
1000 U
20700
2800
670 J
510 J
1200
1000 U
1000 U
1000 U
Total Suspended Solids
TSS
N
u /L
3300
2500 U
51000
129000
306000
159000
3100
127000
114000
Alkalinity, CO3
ALK-CO3
N
N /L
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
/L
101000
108000
88900
84700
80300
73300
1200 J
15400
20000
Alkalinity, lab
ALK-LAB
N
/L
101000
108000
88900
84700 J-
80300
73300
1200 J
15400
20000
Chloride
16887-00-6
N
250000
02L
p /L
2700
2700
2700
2900
3000
2700
1200
1900
2300
Nitrogen, NO2 plus NO3
NO2-NO3
N
-
N /L
1 290
160
91 J-
170
160
110 J+
950
20 UJ
250
Sulfate
14808-79-8
N
250000
02L
/L
11000
11500
11500
11700
12700
12000
1000 U
1000 U
1000 U
Sulfide
18496-25-8
N
/L
100 U
100 U
100 U
100 U
100 U
100 U
100 U
100 U
100 U
Arsenic
7440-38-2
T
10
02L
p /L
-
-
-
-
-
-
-
0.343 J+
-
Chromium
7440-47-3
T
10
02L
N /L
3.27
Iron
7439-89-6
T
300
02L
/L
123
Manganese
7439-96-5
D
/L
11.2
Manganese
7439-96-5
T
50
02L
N /L
14
As(III)
7784-46-5
T
-
pg/L
1 UJ
As V
10103-60-3
T
/L
0.343 J+
Chromium VI
18540-29-9
D
0.07
DHHS
/L
1
Chromium (VI)
18540-29-9
T
0.07
DHHS
u /L
3.7
1.9
5.7
5.2
0.62
1 -
Fe(II)
1345-25-1
T
-
N /L
-
-
-
40 UJ
Se IV
10102-18-8
T
/L
2 U
Page 5 of 8

Table 2-6 Background Groundwater Analytical Results - Rounds 1 through 4
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
BG-3D
BG-3D
BG-3S
BG-3S
BG-3S
BG-3S
MS-10
MW-4
MW-4
Round 3
Round 4
Round 1
Round 2
Round 3
Round 4
Round 4
Round 1
Round 2
11/11/2015
12/11/2015
7/18/2015
9/28/2015
11/13/2015
12/21/2015
12/21/2015
7/10/2015
9/30/2015
N
N
N
N
N
N
N
N
N
MA-BG-3D-NS-4Q15-1
MA-BG-3D-NS-4Q15-2
BG-3S
MA-BG-3S-NS-3Q15
MA-BG-3S-NS-4Q15-1
MA-BG-3S-NS-4Q15-2
MA-MS-10-NS-4Q15-2
MW-4
MA-MW-4-NS-3Q15
Constituent
CAS RN
Fractio
n
Criteria Min
(range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Se VI
13410-01-0
T
/L
2 U
Uranium, Natural
7440-61-1
T
p /L
Radium-226
13982-63-3
T
pCi/L
Radium-228
15262-20-1
T
Ci/L
Uranium-233
13968-55-3
T
/L
Uranium-234
13966-29-5
T
p /L
Uranium-236
13982-70-2
T
p /L
Dissolved Oxygen
DO
N
m /L
5
4.39
2.9
2.58
5.3
7.1
3
4.2
5.34
Temperature
TEMP
N
-
-
Deg C
15.6
14.7
24
19.97
15.1
11.8
14
27
22.52
pH
PH
N
6.5
8.5
02L
SU
6.6
6.6
6.4
6.59
6.3
6.7
4.8
5.7
5.47
Turbidity, field
TURB
N
NTU
4.4
0.9
53.9
149
200.1
104.6
8.4
9.9
29.1
,Specific Conductivity field
SC
NPS/cm
441
249.8
191.8
210
204.2
205
22.4
70.9
50
Oxidation Reduction Potential
ORP
N
mV
85.8
179.6
-33
198.6
241.2
163.8
-9.4
183.8
1 -96.1
GW Depth TOC
GW_DEPTH-TOC
N
I
I
ft
-
28.11
33.78
19.42
1 40.85
Notes:
pm = micron
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
mg/L = milligrams per liter
mV = millivolts
NTU - nephelometric turbidity units
pCi/L = picocuries per liter
SU = standard unit
J = laboratory estimated concentration
J- = estimated concentration, biased low
J+ = estimated concentration, biased high
U = results not detected at concentrations which equal the laboratory's method reporting limit
02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended
effective January 2015)
02L = North Carolina groundwater standards as specified in T15A NCAC 02L
D = dissolved
Deg C = degree Celsius
DHHS = North Carolina Department of Health and Human Services
DO = dissolved oxygen
GW = groundwater
GWQS = groundwater quality standard
IMAC = Interim Maximum Allow Concentration
N = normal
NS = no standard
T = total
TDS = total dissolved solids
TOC = total organic carbon
Page 6 of 8

Table 2-6 Background Groundwater Analytical Results - Rounds 1 through 4
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
MW-4
MW-413
MW-4D
MW-4D
Round 4
Round 1
Round 2
Round 4
12/11/2015
7/10/2015
9/30/2015
12/11/2015
N
N
N
N
MA-MW-4-4Q15-2
MW-4D
MA-MW-4D-NS-3015
MA-MW-4D-4Q15-2
Constituent
CAS RN
Fractio
n
Criteria Min
(range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
/L
100 U
100 U
100 U
100 U
Aluminum
7429-90-5
T
p /L
180
56 J
75 J
56 J
Antimony
7440-36-0
D
p /L
0.5 U
0.41 J
0.33 J
0.5 U
Antimony
7440-36-0
T
1
IMAC
/L
0.5 U
0.33 J
0.46 J
0.5 U
Arsenic
7440-38-2
D
/L
0.5 U
0.23 J+
0.5 U
0.5 U
Arsenic
7440-38-2
T
10
02L
Ea /L
0.5 U
0.33 J
0.5 U
0.5 U
Barium
7440-39-3
D
-
N /L
45
39
39
40
Barium
7440-39-3
T
700
02L
/L
50
40
41
42
Beryllium
7440-41-7
D
/L
0.2 U
0.2 U
0.2 U
0.2 U
Beryllium
7440-41-7
T
4
IMAC
u /L
0.2 U
0.2 U
0.2 U
0.2 U
Boron
7440-42-8
D
-
N /L
50 U
50 UJ
50 U
50 U
Boron
7440-42-8
T
700
02L
/L
50 U
50 U
50 U
50 U
Cadmium
7440-43-9
D
/L
0.08 U
0.031 J
0.08 U
0.08 U
Cadmium
7440-43-9
T
2
02L
N /L
0.08 U
0.08 U
0.08 U
0.08 U
Calcium
7440-70-2
T
-
N /L
4160
5710
5910
6240
Chromium
7440-47-3
D
/L
1.7 J+
0.64
2.8
1.3 J+
Chromium
7440-47-3
T
10
02L
/L
2.7
1.2 J+
11.3
1.2 J+
Cobalt
7440-48-4
D
-
p /L
0.5 U
0.5 U
0.22 J
0.5 U
Cobalt
7440-48-4
T
1
IMAC
N /L
0.5 U
0.5 U
0.3 J
0.5 U
Copper
7440-50-8
D
/L
2.4 J+
0.79 J+
0.78 J
6.6 J+
Copper
7440-50-8
T
1000
02L
/L
0.34 J
0.38 J
2.4
0.81 J
Iron
7439-89-6
D
-
N /L
50 U
50 U
27 J
50 U
Iron
7439-89-6
T
300
02L
p /L
250
77
210
88
Lead
7439-92-1
D
/L
0.18
0.067 J+
0.1 U
0.73
Lead
7439-92-1
T
15
02L
/L
0.12
0.078 J
0.073 J
0.065 J
Magnesium
7439-95-4
T
-
u /L
755
1310
1350
1320
Manganese
7439-96-5
D
-
N /L
5 U
5 U
8.8
5 U
Manganese
7439-96-5
T
50
02L
/L
4.7 J
4.1 J
15
4.8 J
Mercury
7439-97-6
D
/L
0.2 U
0.2 U
0.2 U
0.2 U
Mercury
7439-97-6
T
1
02L
N /L
0.2 U
0.2 U
0.2 U
0.2 U
Methane
74-82-8
N
-
p /L
1.4 J+
1.3 J+
1 J+
1.5 J+
Molybdenum
7439-98-7
D
/L
0.5 U
0.42 J+
1
0.29 J
Molybdenum
7439-98-7
T
/L
0.14 J
0.75 J+
0.93
0.34 J
Nickel
7440-02-0
D
p /L
1 0.22 J+
0.42 J
8.6
1 J+
Nickel
7440-02-0
T
100
02L
N /L
0.66
0.4 J
11.3
0.72
Potassium
7440-09-7
T
/L
5000 U
5000 U
5000 U
5000 U
Selenium
7782-49-2
D
/L
0.5 U
0.5 U
0.5 U
0.5 U
Selenium
7782-49-2
T
20
02L
Ea /L
0.5 U
0.5 U
0.5 U
0.5 U
Sodium
7440-23-5
T
-
N /L
4250 J
7640
7500
7370
Strontium
7440-24-6
D
/L
84
180
190
180
Strontium
7440-24-6
T
/L
100
180
190
190
Thallium
7440-28-0
D
-
Ea /L
0.1 U
0.049 J+
0.1 U
0.1 U
Thallium
7440-28-0
T
0.2
IMAC
N /L
0.1 U
0.1 U
0.1 U
0.1 U
Vanadium
7440-62-2
D
/L
0.92 J
2.6
2.5
2.7
Vanadium
7440-62-2
T
0.3
IMAC
/L
1.7
2.8
2.5 J+
2.9
Zinc
7440-66-6
D
-
u /L
15
4.1 J+
16
4.6 J
Zinc
7440-66-6
T
1000
02L
N /L
10 U
10 U
28 J+
2.8 J+
Total Dissolved Solids
TDS
N
500000
02L
/L
1 41000
82000 J+
67000
59000
Total Organic Carbon
TOC
N
/L
10600
1000 U
1000 U
1000 U
Total Suspended Solids
TSS
N
u /L
4700
3500
56500
5200 U
Alkalinity, CO3
ALK-CO3
N
N /L
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
/L
22400
31800
34800
35700
Alkalinity, lab
ALK-LAB
N
/L
22400
31800
34800
35700
Chloride
16887-00-6
N
250000
02L
p /L
2000 J-
1200
1800
1700
Nitrogen, NO2 plus NO3
NO2-NO3
N
-
N /L
15 J
12 J-
45
36
Sulfate
14808-79-8
N
250000
02L
/L
1 1000 U
1000 J
1700
1300
Sulfide
18496-25-8
N
/L
100 U
100 U
100 U
100 U
Arsenic
7440-38-2
T
10
02L
p /L
-
0.5 UJ
-
-
Chromium
7440-47-3
T
10
02L
N /L
1.29 J+
Iron
7439-89-6
T
300
02L
/L
99.8 J+
Manganese
7439-96-5
D
/L
2.56 J+
Manganese
7439-96-5
T
50
02L
N /L
4.05 J+
As(III)
7784-46-5
T
-
pg/L
1 UJ
As V
10103-60-3
T
/L
1 UJ
Chromium VI
18540-29-9
D
0.07
DHHS
/L
-
0.32
Chromium (VI)
18540-29-9
T
0.07
DHHS
u /L
2
0.8
Fe(II)
1345-25-1
T
-
N /L
-
40 UJ
Se IV
10102-18-8
T
I pg/L
2 U
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Page 7 of 8

Table 2-6 Background Groundwater Analytical Results - Rounds 1 through 4
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
MW-4
MW-413
MW-4D
MW-4D
Round 4
Round 1
Round 2
Round 4
12/11/2015
7/10/2015
9/30/2015
12/11/2015
N
N
N
N
MA-MW-4-4Q15-2
MW-4D
MA-MW-4D-NS-3015
MA-MW-4D-4Q15-2
Constituent
CAS RN
Fractio
n
Criteria Min
(range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Se VI
13410-01-0
T
/L
2 U
Uranium, Natural
7440-61-1
T
p /L
Radium-226
13982-63-3
T
pCi/L
Radium-228
15262-20-1
T
Ci/L
Uranium-233
13968-55-3
T
/L
Uranium-234
13966-29-5
T
p /L
Uranium-236
13982-70-2
T
p /L
-
-
-
Dissolved Oxygen
DO
N
m /L
5.38
4.3
8.14
Temperature
TEMP
N
-
-
Deg C
14.3
21
21.13
pH
PH
N
6.5
8.5
02L
SU
5.91
6.2
5.91
Turbidity, field
TURB
N
-
-
NTU
1.37
8.9
9.61
,Specific Conductivity field
SC
N
44
119.9
80
Oxidation Reduction Potential
ORP
N
qftv
254
159.3
98.2
GW Depth TOC
GW_DEPTH-TOC
N
38.5
39.31
Notes:
pm = micron
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
mg/L = milligrams per liter
mV = millivolts
NTU - nephelometric turbidity units
pCi/L = picocuries per liter
SU = standard unit
J = laboratory estimated concentration
J- = estimated concentration, biased low
J+ = estimated concentration, biased high
U = results not detected at concentrations which equal the laboratory's method reporting limit
02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended
effective January 2015)
02L = North Carolina groundwater standards as specified in T15A NCAC 02L
D = dissolved
Deg C = degree Celsius
DHHS = North Carolina Department of Health and Human Services
DO = dissolved oxygen
GW = groundwater
GWQS = groundwater quality standard
IMAC = Interim Maximum Allow Concentration
N = normal
NS = no standard
T = total
TDS = total dissolved solids
TOC = total organic carbon
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Page 8 of 8

Table 2-7 Groundwater Analytical Results Upgradient of Source Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
GWA-2D
GWA-2D
GWA-2S
GWA-2S
GWA-3D
GWA-3D
GWA-3S
GWA-3S
GWA-4D
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
7/16/2015
9/30/2015
7/16/2015
9/30/2015
7/19/2015
9/30/2015
7/19/2015
9/30/2015
7/18/2015
N
N
N
N
N
N
N
N
N
GWA-2D
MA-GWA-2D-NS-3Q15
GWA-2S
MA-GWA-2S-NS-3Q15
GWA-3D
MA-GWA-3D-NS-3Q15
GWA-3S
MA-GWA-3S-NS-3015
GWA-4D
Constituent
CAS RN
Fractio
n
Criteria
Min (range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
Ng/L
950
810
50
100 U
720
100 U
100 U
100 U
60 J
Aluminum
7429-90-5
T
/L
1100
800
77 J
100 U
910
100 U
66 J
100 U
650
Antimony
7440-36-0
D
Ng/L
4.1
-
0.15
0.5 U
7.5
0.5 U
0.5 U
0.5 U
0.43 J
Antimony
7440-36-0
T
1
IMAC
/L
4.1
2.7
0.15
0.5 U
6.2
0.5 U
0.5 U
0.5 U
0.31 J
Arsenic
7440-38-2
D
-
Ng/L
0.16 J
-
0.11
0.5 U
0.39 J
0.39 J
0.13 J
0.5 U
2.3
Arsenic
7440-38-2
T
10
02L
/L
0.35 J
0.18 J
0.11
0.5 U
0.47 J
0.52
0.16 J
0.18 J
2.9
Barium
7440-39-3
D
-
N /L
120
98
93
65
24
19
34
32
13
Barium
7440-39-3
T
700
02L
/L
140
160
100
60
26
20
38
33
20
Beryllium
7440-41-7
D
-
Ng/L
0.067
-
0.074 J
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Beryllium
7440-41-7
T
4
IMAC
/L
0.067
0.2 U
0.067
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Boron
7440-42-8
D
-
Ng/L
25
50 U
25
50 U
50 U
50 U
50 U
50 U
50 U
Boron
7440-42-8
T
700
02L
/L
25
50 U
25
50 U
50 U
50 U
50 U
26 J+
50 U
Cadmium
7440-43-9
D
-
Ng/L
0.024
-
0.028 J
0.08 U
0.13
0.08 U
0.033 J
0.08 U
0.08 U
Cadmium
7440-43-9
T
2
02L
/L
0.028 J
0.08 U
0.038 J
0.08 U
0.13
0.08 U
0.08 U
0.08 U
0.08 U
Calcium
7440-70-2
T
-
Ng/L
175000
193000
4500
2910
83800
21400
4670
4370
25600
Chromium
7440-47-3
D
/L
146
-
2.2
1.8
14.5
1.8
0.67 J+
0.48 J
1.2 J+
Chromium
7440-47-3
T
10
02L
Ng/L
182
163
2.3
1.4 J+
17.2
1.8
0.68
0.91
8
Cobalt
7440-48-4
D
/L
0.13
-
2.1
1.3
0.5 U
0.5 U
0.54
0.5 U
0.5 U
Cobalt
7440-48-4
T
1
IMAC
Ng/L
0.18 J
0.5 U
2.6
1
0.5 U
0.5 U
0.63
0.5 U
0.69
Copper
7440-50-8
D
/L
2.9
-
9.5
0.29 J
0.94 J
1 U
1.9
0.26 J
0.42 J+
Copper
7440-50-8
T
1000
02L
Ng/L
4.4
4.7
0.21
1 UJ
3.4
1 U
0.39 J
1 U
2.6
Iron
7439-89-6
D
/L
25
50 U
25
50 U
50 U
50 U
50 U
50 U
50 U
Iron
7439-89-6
T
300
02L
lJ/L
140
50 U
50
50 U
140
50 U
120
45 J
930
Lead
7439-92-1
D
/L
0.11
-
0.97
0.1 U
0.1 UJ
0.1 U
0.12 J+
0.1 U
0.066 J+
Lead
7439-92-1
T
15
02L
Ng/L
0.24
0.13
0.065 J
0.1 U
0.14
0.1 U
0.12
0.1 U
0.35
Magnesium
7439-95-4
T
/L
50
100 U
3340
2000
79.4 J
2200
1190
1090
3590
Manganese
7439-96-5
D
-
Ng/L
2.5
5 U
84
45
5 U
3.4 J
90
5 U
35
Manganese
7439-96-5
T
50
02L
/L
3.5 J
5 U
92
48
6
4 J
97
3.3 J
69
Mercury
7439-97-6
D
-
Ng/L
0.09
0.2 U
0.09
0.2 U
0.2 U
0.2 UJ
0.2 U
0.2 UJ
0.2 UJ
Mercury
7439-97-6
T
1
02L
/L
0.07
0.2 U
0.07
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Methane
74-82-8
N
Ng/L
2.3 J
2.5 J+
2.2 J
1.5 J+
1.7 J
0.91 J+
1.1 J
0.95 J+
0.67 J+
Molybdenum
7439-98-7
D
/L
8.4
-
0.094
0.5 U
410
32.1
0.34 J+
0.32 J
6.4
Molybdenum
7439-98-7
T
Ng/L
10.1 J-
8.6
0.094
0.5 U
474
32.6
0.4 J
0.34 J
7
Nickel
7440-02-0
D
/L
0.16
-
1.2
0.56
0.5 U
0.5 UJ
0.8
0.5 UJ
0.52
Nickel
7440-02-0
T
100
02L
Ng/L
0.71
0.23 J
1
0.47 J
0.22 J
0.18 J
0.74
0.28 J
3.4
Potassium
7440-09-7
T
/L
5960
6400
2500
5000 U
10400
5000 U
5000 U
5000 U
3670 J
Selenium
7782-49-2
D
-
Ng/L
3.8
-
0.24 J
0.24 J
0.38 J
0.5 U
0.5 U
0.5 U
0.58
Selenium
7782-49-2
T
20
02L
/L
5
4.3
0.32 J
0.5 U
0.4 J
0.5 U
0.5 U
0.5 U
0.62
Sodium
7440-23-5
T
-
Ng/L
88800
102000
2500
2700 J
16400
8410
8370
8020
21900
Strontium
7440-24-6
D
/L
1200
1000
25
17
220
94
47
47
95
Strontium
7440-24-6
T
Ng/L
1300
1400
27
15
230
96
49
47
97
Thallium
7440-28-0
D
/L
0.015
-
0.14 J+
0.088 J
0.1 U
0.1 U
0.1 U
0.1 U
0.1 U
Thallium
7440-28-0
T
0.2
IMAC
N /L
0.045 J
0.1 U
0.14
0.083 J
0.1 U
0.1 U
0.1 U
0.1 U
0.021 J
Vanadium
7440-62-2
D
/L
12
-
0.28
1 U
21
4.7
0.37 J
0.81 J
6.9
Vanadium
7440-62-2
T
0.3
IMAC
Ng/L
12.2
9.1
0.33 J
1 U
24.6
4.9
0.56 J
0.89 J
8.6
Zinc
7440-66-6
D
/L
2.5 J+
IOU
8.1 J
8.4 J
10 U
IOU
15
IOU
10 U
Zinc
7440-66-6
T
1000
02L
N /L
94
5 J
8.9 J+
4.3 J
3.8 J
IOU
7.3 J
IOU
33
Total Dissolved Solids
TDS
N
500000
02L
/L
650000
380000
57000
25000 U
260000
701000
76000
75000
176000
Total Organic Carbon
TOC
N
-
u /L
26600
25800 J+
740 J
1000 UJ
2200
1000 U
1000 U
1000 U
4000
Total Suspended Solids
TSS
N
/L
15200
3300 U
2500
2800 U
42000
2500 U
3100
2500 U
13700
Alkalinity, CO3
ALK-CO3
N
Ng/L
313000
43900
1000
5000 U
193000
5000 U
5000 U
5000 U
1000 J
Alkalinity, HCO3
ALK-HCO3
N
/L
1000
5000 U
7300
6900
22800
73100
28400
28200
86300
Alkalinity, lab
ALK-LAB
N
Ng/L
516000
45600
7300
6900
216000
73100
28400
28200
87300
Chloride
16887-00-6
N
250000
02L
/L
9100 J-
7800
940 J
920 J
3600
2300
2200
2500
5200
Nitrogen, NO2 plus NO3
NO2-NO3
N
-
lJ/L
14 J
20 U
17 J
30
160
180
290
350
120 J-
Sulfate
14808-79-8
N
250000
02L
/L
70700
85900
22400
14300
11800
6200
1600
1100
24200
Sulfide
18496-25-8
N
-
Ng/L
100
100 U
100
100 U
100 U
100 UJ
100 U
100 UJ
100 U
Arsenic
7440-38-2
T
10
02L
/L
-
-
-
-
-
-
-
-
-
Chromium
7440-47-3
T
10
02L
Ng/L
Iron
7439-89-6
T
300
02L
/L
Manganese
7439-96-5
D
-
Ng/L
Manganese
7439-96-5
T
50
02L
/L
As III
7784-46-5
T
-
Ng/L
As V
10103-60-3
T
/L
Chromium VI
18540-29-9
D
0.07
DHHS
Ng/L
Fe II
1345-25-1
T
/L
Se IV
10102-18-8
T
I
Ng/L
Se VI
13410-01-0
T
I
I
Pg/L
Page 1 of 10

Table 2-7 Groundwater Analytical Results Upgradient of Source Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
GWA-2D
GWA-21D
GWA-2S
GWA-2S
GWA-3D
GWA-3D
GWA-3S
GWA-3S
GWA-4D
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
7/16/2015
9/30/2015
7/16/2015
9/30/2015
7/19/2015
9/30/2015
7/19/2015
9/30/2015
7/18/2015
N
N
N
N
N
N
N
N
N
GWA-2D
MA-GWA-2D-NS-3Q15
GWA-2S
MA-GWA-2S-NS-3Q15
GWA-3D
MA-GWA-3D-NS-3Q15
GWA-3S
MA-GWA-3S-NS-3015
GWA-4D
Constituent
CAS RN
Fractio
n
Criteria
Min (range
onl
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Dissolved Oxygen
DO
N
m /L
1.6
1.8
6.6
7.86
4.5
5.19
4.14
6.56
0.91
Temperature
TEMP
N
-
-
Deg C
23.6
19.8
23.4
16.9
22.8
18.6
24.9
20.6
26.8
H
PH
N
6.5
8.5
02L
SU
11.9
12.02
5.4
9.6
11.5
6.77
5.68
7.49
8.67
Turbidity, field
TURB
N
NTU
7.5
9.39
3.7
6.01
7.2
8.82
2.74
5.35
41.63
Specific Conductivity field
Sc
NPS/cm
2593
2180
78.3
80
1002
167
77.1
70
301.8
Oxidation Reduction Potential
ORP
N
my
-97.9
35
50
61.2
-88.2
91.4
286.7
150.5
97.1
GW Depth TOC
GW_DEPTH-TOC
N
ft
31.32
25.5
6.8
9.5
Notes:
pm = micron
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
mg/L = milligrams per liter
my = millivolts
NTU - nephelometric turbidity units
pCi/L = picocuries per liter
SU = standard unit
J = laboratory estimated concentration
J- = estimated concentration, biased low
J+ = estimated concentration, biased high
U = results not detected at concentrations which equal the laboratory's method reporting limit
02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216
(amended effective January 2015)
02L = North Carolina groundwater standards as specified in T15A NCAC 02L
D = dissolved
Deg C = degree Celsius
DHHS = North Carolina Department of Health and Human Services
DO = dissolved oxygen
GW = groundwater
GWQS = groundwater quality standard
IMAC = Interim Maximum Allow Concentration
N = normal
NS = no standard
T = total
TDS = total dissolved solids
TOC = total organic carbon
Page 2 of 10

Table 2-7 Groundwater Analytical Results Upgradient of Source Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
GWA-4D
GWA-4S
GWA-4S
GWA-51D
GWA-5D
GWA-5S
GWA-5S
GWA-6D
GWA-6D
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
10/1/2015
7/18/2015
9/30/2015
7/19/2015
10/1/2015
7/20/2015
10/1/2015
7/17/2015
9/30/2015
N
N
N
N
N
N
N
N
N
MA-GWA-4D-NS-3Q15
GWA-4S
MA-GWA-4S-NS-3Q15
GWA-51D
MA-GWA-5D-NS-3Q15
GWA-5S
MA-GWA-5S-NS-3Q15
GWA-6D
MA-GWA-6D-NS-3Q15
Constituent
CAS RN
Fractio
n
Criteria
Min (range
onl
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
N /L
100 U
100 U
100 U
100 U
100 U
100 U
100 U
370
100 U
Aluminum
7429-90-5
T
/L
100 U
4800
150
84 J
100 U
13100 J+
980
1100
79 J
Antimony
7440-36-0
D
Ng/L
1.7
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
17.2
0.5 U
Antimony
7440-36-0
T
1
IMAC
/L
1.3
0.5 U
0.5 U
0.27 J
0.5 U
0.5 U
0.5 U
11.4
0.5 U
Arsenic
7440-38-2
D
-
IJ/L
1
0.5 U
0.5 U
0.2 J
0.13 J
0.14 J
0.14 J
0.59
0.19 J
Arsenic
7440-38-2
T
10
02L
/L
0.91
0.53
0.5 U
0.22 J
0.5 U
1.4
0.55
0.91
0.26 J
Barium
7440-39-3
D
-
N /L
16
38
38
17
17
26
21
41
40
Barium
7440-39-3
T
700
02L
/L
17
110
39
19
18
270
36
71
46
Beryllium
7440-41-7
D
-
lJ/L
0.2U
0.2U
0.2U
0.2U
0.2U
0.2U
0.2U
0.2U
0.2U
Beryllium
7440-41-7
T
4
IMAC
/L
0.2 U
0.39
0.2 U
0.2 U
0.2 U
0.19 J
0.071 J
0.2 U
0.2 U
Boron
7440-42-8
D
-
lJ/L
50 U
50 U
50 U
50 U
50 U
36 J
29 J
50 U
50 U
Boron
7440-42-8
T
700
02L
/L
50 U
50 U
50 UJ
50 U
50 U
50 UJ
34 J
50 U
50 U
Cadmium
7440-43-9
D
-
Ng/L
0.08 U
0.12
0.066 J
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
Cadmium
7440-43-9
T
2
02L
/L
0.08 U
0.13
0.052 J
0.08 U
0.08 U
0.028 J
0.08 U
0.08 U
0.08 U
Calcium
7440-70-2
T
-
N /L
32100
5260
3570
3090
100 U
4020
3080
78500
2720
Chromium
7440-47-3
D
/L
1.4
0.43 J+
0.71
0.73 J+
0.59
0.32 J
1.9
9.9
0.46 J
Chromium
7440-47-3
T
10
02L
u /L
2.1 J+
8.5
16.8
1.5
1.4 J+
4.6
3.5
17.9
0.85
Cobalt
7440-48-4
D
/L
0.5 U
3.5
1.8
0.16 J
0.5 U
0.94
0.17 J
0.5 U
0.19 J
Cobalt
7440-48-4
T
1
IMAC
Ng/L
0.13 J
6.9
2
0.21 J
0.5 U
2.4
0.52
0.95
0.32 J
Copper
7440-50-8
D
/L
8.1
4.9 J+
0.22 J
1.5
0.27 J
1.5 J+
0.41 J
1.8 J+
0.23 J
Copper
7440-50-8
T
1000
02L
IJ/L
60.7
17.5
1.1
1.9
0.56 J
1.7
1.4
4.6
0.74 J
Iron
7439-89-6
D
/L
50 U
50 U
54
50 U
50 U
50 U
50 U
50 U
50 U
Iron
7439-89-6
T
300
02L
N /L
90
8600
480
190
55
20500 J+
1400
660
67
Lead
7439-92-1
D
/L
0.1 U
0.46 J+
0.1 U
0.047 J+
0.1 U
0.077 J
0.1 U
0.1 U
0.1 U
Lead
7439-92-1
T
15
02L
Ng/L
0.081 J
1.9
0.055 J
0.13
0.046 J
2
0.61
0.59
0.064 J
Magnesium
7439-95-4
T
/L
5170
1460
958
858
100 U
2200
1020
605
840
Manganese
7439-96-5
D
-
Ng/L
2.6 J
1400
410
6.4
5 U
130
100
5 U
17
Manganese
7439-96-5
T
50
02L
/L
8.3
1700
390
7.4
5 U
590
130
14
31
Mercury
7439-97-6
D
-
Ng/L
0.2 U
0.2 UJ
0.2 UJ
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Mercury
7439-97-6
T
1
02L
/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Methane
74-82-8
N
N /L
1.6 J+
2.1 J+
10 UJ
10 U
0.85 J+
1.3 J
1.4 J+
2.4 J
0.78 J+
Molybdenum
7439-98-7
D
/L
6
1.1
0.37 J
0.79 J+
0.33 J
0.71
1.1
15.1
1.8
Molybdenum
7439-98-7
T
N /L
6.8
1.5
0.68
0.85
0.39 J
0.34 J
1.1
20.1
1.9
Nickel
7440-02-0
D
/L
0.72
1.2
2.9 J+
0.68
0.5 U
5.9
1.2
0.5 U
0.42 J
Nickel
7440-02-0
T
100
02L
Ng/L
1.2
2.6
10.6
0.7
0.21 J
4.4
1.2
0.98
0.56
Potassium
7440-09-7
T
/L
3420 J
2520 J
5000 U
5000 U
5000 U
4580 J
2840 J
27600
5000 U
Selenium
7782-49-2
D
-
IJ/L
0.35 J
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.82
0.5 U
Selenium
7782-49-2
T
20
02L
/L
0.35 J
0.5 U
0.5 U
0.5 U
0.5 U
0.73
0.25 J
1.1
0.5 U
Sodium
7440-23-5
T
-
N /L
9510
5730
5250
5150
5000 U
9820
7390
17700
5260
Strontium
7440-24-6
D
/L
110
51
43
84
86
81
99
790
530
Strontium
7440-24-6
T
Ng/L
120
56
40
87
91
170
110
1100
570
Thallium
7440-28-0
D
/L
0.1 U
0.1 U
0.1 U
0.1 U
0.1 U
0.1 U
0.1 U
0.019 J
0.1 U
Thallium
7440-28-0
T
0.2
IMAC
lJ/L
0.1 U
0.083 J
0.1 U
0.1 U
0.1 U
0.072 J
0.025 J
0.023 J
0.1 U
Vanadium
7440-62-2
D
/L
3.2
1 U
0.32 J
1.6
1.4
0.3 J
0.5 J
7.8
1.4
Vanadium
7440-62-2
T
0.3
IMAC
Ng/L
3.2
19.5
0.82 J
1.8
1.2
9.2
3.5
12.8
1.5
Zinc
7440-66-6
D
/L
23
10 U
3.9 J
12
3.4 J
18
4.7 J
10 U
10 U
Zinc
7440-66-6
T
1000
02L
N /L
44
27 J+
2.9 J
23
3.1 J
67
6.4 J
9.3 J
10 U
Total Dissolved Solids
TDS
N
500000
02L
/L
160000
77000
53000
69000 J+
61000
64000
63000
229000
139000
Total Organic Carbon
TOC
N
-
N /L
650 J
1000 U
1000 U
1000 U
2800
770 J
15600
2400
1000 U
Total Suspended Solids
TSS
N
/L
4400
397000
16600
5200
3200
176000
924000
7700
3500
Alkalinity, CO3
ALK-CO3
N
Ng/L
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
82500
5000 U
Alkalinity, HCO3
ALK-HCO3
N
/L
110000
22000
15600
15200
13000
13300
18600
5000 U
80700
Alkalinity, lab
ALK-LAB
N
Ng/L
110000
22000
15600
15200
13000
13300
18600
130000
80700
Chloride
16887-00-6
N
250000
02L
/L
4100
3700
4000
1900
1800
6600
2900 J+
7000
4000
Nitrogen, NO2 plus NO3
NO2-NO3
N
-
lJ/L
570
1400 J-
1600
640
690
230
710
110 J-
140
Sulfate
14808-79-8
N
250000
02L
/L
7600
1000 U
570 J
4000
3400
6200
3200 J+
57100
8500
Sulfide
18496-25-8
N
-
lJ/L
100 U
100 U
100 UJ
100 U
100 U
100 U
100 UJ
100 U
100 U
Arsenic
7440-38-2
T
10
02L
/L
-
-
-
-
-
-
-
-
-
Chromium
7440-47-3
T
10
02L
Ng/L
Iron
7439-89-6
T
300
02L
/L
Manganese
7439-96-5
D
-
Ng/L
Manganese
7439-96-5
T
50
02L
/L
As III
7784-46-5
T
-
Ng/L
As V
10103-60-3
T
/L
Chromium VI
18540-29-9
D
0.07
DHHS
Ng/L
Fe II
1345-25-1
T
/L
Se IV
10102-18-8
T
Ng/L
Se VI
13410-01-0
T
/L
Page 3 of 10

Table 2-7 Groundwater Analytical Results Upgradient of Source Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
GWA-4D
GWA-4S
GWA-4S
GWA-51D
GWA-5D
GWA-5S
GWA-5S
GWA-6D
GWA-6D
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
10/1/2015
7/18/2015
9/30/2015
7/19/2015
10/1/2015
7/20/2015
10/1/2015
7/17/2015
9/30/2015
N
N
N
N
N
N
N
N
N
MA-GWA-4D-NS-3Q15
GWA-4S
MA-GWA-4S-NS-3Q15
GWA-51D
MA-GWA-5D-NS-3Q15
GWA-5S
MA-GWA-5S-NS-3Q15
GWA-6D
MA-GWA-6D-NS-3Q15
Constituent
CAS RN
Fractio
n
Criteria
Min (range
oni
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Dissolved Oxygen
DO
N
m /L
3.72
5.44
6.81
4.7
4.49
5
4.54
3.3
3.16
Temperature
TEMP
N
Deg C
19.4
25.6
21.4
26.7
19.7
29
21.8
24.4
20.6
H
PH
N
6.5
8.5
02L
SU
7.87
6.05
5.34
6.4
6.42
6
6.42
11.3
7.84
Turbidity, field
TURB
N
-
-
NTU
7.98
152.4
8.89
7.9
4.81
135.3
14.5
7.3
9.3
Specific Conductivity field
Sc
N
P S/cm
260.3
104.2
60
66.8
80
74.5
100
912
280
Oxidation Reduction Potential
ORP
N
my
-3.3
163.7
151.1
137.3
124.1
176
112.1
-88.2
87.9
GW Depth TOC
GW DEPTH-TOC
N
ft
69.75
60.25
35.6
44.71
Notes:
pm = micron
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
mg/L = milligrams per liter
my = millivolts
NTU - nephelometric turbidity units
pCi/L = picocuries per liter
SU = standard unit
J = laboratory estimated concentration
J- = estimated concentration, biased low
J+ = estimated concentration, biased high
U = results not detected at concentrations which equal the laboratory's method reporting limit
02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216
(amended effective January 2015)
02L = North Carolina groundwater standards as specified in T15A NCAC 02L
D = dissolved
Deg C = degree Celsius
DHHS = North Carolina Department of Health and Human Services
DO = dissolved oxygen
GW = groundwater
GWQS = groundwater quality standard
IMAC = Interim Maximum Allow Concentration
N = normal
NS = no standard
T = total
TDS = total dissolved solids
TOC = total organic carbon
Page 4 of 10

Table 2-7 Groundwater Analytical Results Upgradient of Source Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
GWA-6S
GWA-6S
GWA-7D
GWA-7D
GWA-7S
GWA-7S
GWA-8D
GWA-8D
GWA-8S
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
7/17/2015
9/30/2015
7/16/2015
10/1/2015
7/16/2015
10/1/2015
7/20/2015
10/1/2015
7/21/2015
N
N
N
N
N
N
N
N
N
GWA-6S
MA-GWA-6S-NS-3Q15
GWA-7D
MA-GWA-7D-NS-3Q15
GWA-7S
MA-GWA-7S-NS-3Q15
GWA-8D
MA-GWA-8D-NS-3Q15
GWA-8S
Constituent
CAS RN
Fractio
n
Criteria
Min (range
onl
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
N /L
100 U
100 U
50
100 U
50
100 U
100 U
100 U
100 U
Aluminum
7429-90-5
T
/L
170
560
1400
59 J
7100
100 U
770
130
1200
Antimony
7440-36-0
D
Ng/L
0.52
0.5 U
0.15
0.5 U
0.15
0.5 U
0.5 U
0.19 J
0.5 U
Antimony
7440-36-0
T
1
IMAC
/L
0.79
0.5 U
0.15
0.5 U
0.15
0.5 U
0.59
0.2 J
0.5 U
Arsenic
7440-38-2
D
-
IJ/L
0.5 U
0.5 U
0.26 J
0.12 J
0.28 J
0.14 J
0.13 J
0.19 J
0.14 J
Arsenic
7440-38-2
T
10
02L
/L
0.12 J
0.13 J
0.85
0.26 J
2.4
0.17 J
0.2 J
0.18 J
0.2 J
Barium
7440-39-3
D
-
N /L
67
65
200
320
230
250
28
26
17
Barium
7440-39-3
T
700
02L
/L
72
76
230
320
290
270
38
27
33
Beryllium
7440-41-7
D
-
lJ/L
0.096 J
0.094 J
0.067
0.2 U
0.067
0.2 U
0.2 U
0.2 U
0.2 U
Beryllium
7440-41-7
T
4
IMAC
/L
0.15 J
0.2
0.067
0.2 U
0.16 J
0.2 U
0.2 U
0.2 U
0.2 U
Boron
7440-42-8
D
-
lJ/L
50 U
50 U
41 J
50 U
37 J
50 U
57
50 U
26 J
Boron
7440-42-8
T
700
02L
/L
50 U
50 UJ
45 J
50 UJ
34 J
50 UJ
42 J
50 U
50 U
Cadmium
7440-43-9
D
-
Ng/L
0.08 U
0.08 U
0.024
0.08 U
0.027 J
0.08 U
0.08 U
0.08 U
0.08 U
Cadmium
7440-43-9
T
2
02L
/L
0.08 U
0.08 U
0.024
0.08 U
0.024
0.08 U
0.08 U
0.08 U
0.08 U
Calcium
7440-70-2
T
-
lJ/L
3360
24900
8960
9570 J+
10700
12800 J+
7820
7160
6940
Chromium
7440-47-3
D
/L
0.42 J
0.37 J
4.7
4.9
0.55
1.3
0.3 J
0.33 J
1.3
Chromium
7440-47-3
T
10
02L
u /L
2
1
6.7
5.5
22.1
0.97 J+
1.4
1.3
2.8
Cobalt
7440-48-4
D
/L
0.62
0.3 J
0.54
0.13 J
3.8
3.3
0.21 J
0.5 U
0.27 J
Cobalt
7440-48-4
T
1
IMAC
Ng/L
0.78
0.54
0.99
0.2 J
8.4
3.2
0.38 J
0.29 J
0.77
Copper
7440-50-8
D
/L
0.57 J+
0.53 J
0.28 J
1.1
6.5
0.51 J
1.6 J+
12.8
0.88 J+
Copper
7440-50-8
T
1000
02L
N /L
1.9
1.1
1.7
0.23 J
21.5
0.23 J
0.97 J
1.8 J+
1 J
Iron
7439-89-6
D
/L
50 U
50 U
25
50 U
190
67
50 U
50 U
50 U
Iron
7439-89-6
T
300
02L
N /L
190
780
2200
110
12300
130
830
210
1500
Lead
7439-92-1
D
/L
0.1 U
0.1 U
0.071 J
0.17
0.82
0.12
0.14
1.3
0.094 J
Lead
7439-92-1
T
15
02L
Ng/L
0.4
0.98
1.1
0.12
3.5
0.1 U
0.21 J+
0.088 J
0.38
Magnesium
7439-95-4
T
/L
712
2830
12000
13900 J+
14800
17200 J+
1920
1980
1650
Manganese
7439-96-5
D
-
Ng/L
82
62
41
23
310
520
15
32
31
Manganese
7439-96-5
T
50
02L
/L
82
77
76
24
510
600
26
33
130
Mercury
7439-97-6
D
-
Ng/L
0.2 U
0.2 U
0.09
0.2 U
0.09
0.2 U
0.2 U
0.2 U
0.2 U
Mercury
7439-97-6
T
1
02L
/L
0.2 U
0.2 U
0.07
0.2 U
0.07
0.2 U
0.2 U
0.2 U
0.2 U
Methane
74-82-8
N
N /L
1.8 J
1.2 J+
0.63 J+
1.7 J+
3.9 J
1.9 J+
1.6 J
1.3 J+
1.4 J
Molybdenum
7439-98-7
D
/L
0.28 J
0.5 U
1.2
0.77
1.7
1.6
0.57
1.1
0.18 J
Molybdenum
7439-98-7
T
N /L
0.34 J
0.5 U
1.4
0.78
1.6
2
0.57
0.99
0.2 J
Nickel
7440-02-0
D
/L
0.84
0.59
5.9
4.3
5
6.7
0.81
0.83
0.93
Nickel
7440-02-0
T
100
02L
Ng/L
1
0.68
7
4.8
14.9
5.5
1.1
1.1
1.7
Potassium
7440-09-7
T
/L
5000 U
6940
6920
7190
5130
4760 J
2930 J
2720 J
5000 U
Selenium
7782-49-2
D
-
N /L
0.5 U
0.5 U
0.25 J
0.25 J
0.2
0.5 U
0.5 U
0.5 U
0.5 U
Selenium
7782-49-2
T
20
02L
/L
0.5 U
0.5 U
0.35 J
0.28 J
0.35 J
0.5 U
0.5 U
0.5 U
0.5 U
Sodium
7440-23-5
T
-
N /L
5820
14300
6400
6750 J+
7290
8360 J+
9550
8740
7260
Strontium
7440-24-6
D
/L
68
64
210
200
220
240
180
180
160
Strontium
7440-24-6
T
Ng/L
74
64
220
190
250
250
200
180
190
Thallium
7440-28-0
D
/L
0.1 U
0.1 U
0.015
0.1 U
0.015
0.1 U
0.1 U
0.1 U
0.1 U
Thallium
7440-28-0
T
0.2
IMAC
lJ/L
0.1 U
0.1 U
0.015
0.1 U
0.13
0.1 U
0.1 U
0.1 U
0.1 U
Vanadium
7440-62-2
D
/L
1 U
0.41 J
3
3.6
0.96 J
0.83 J
3.4
3.3
2.5
Vanadium
7440-62-2
T
0.3
IMAC
Ng/L
0.92 J
1.2
6.1
4.5 J+
23.7
1.2 J+
4.8
3.9
3.5
Zinc
7440-66-6
D
/L
31
11
7.2 J
7.7 J
6.5 J
10 U
11
10
5.7 J
Zinc
7440-66-6
T
1000
02L
N /L
31
11
21 J+
3.8 J
26 J+
10 UJ
9.9 J
17
7.1 J
Total Dissolved Solids
TDS
N
500000
02L
/L
50000
58000
148000
145000
197000
157000
101000
93000
72000
Total Organic Carbon
TOC
N
-
N /L
1000 U
1000 U
500
1000 UJ
560 J
1000 UJ
1000 U
1000 U
1000 U
Total Suspended Solids
TSS
N
/L
14700
5000
23500
2500 UJ
176000
4200 UJ
17700
57000
252000
Alkalinity, CO3
ALK-CO3
N
Ng/L
5000 U
5000 U
1000
5000 U
1000
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
/L
20600
19400
78000
82900
86300
93600
35700
39700
28300
Alkalinity, lab
ALK-LAB
N
Ng/L
20600
19400
78000
82900 J-
86300
93600 J-
35700
39700
28300
Chloride
16887-00-6
N
250000
02L
/L
3100
3500
3200
3000
3600
3800 J
3600
3300
4300
Nitrogen, NO2 plus NO3
NO2-NO3
N
-
lJ/L
120 J-
130
250 J-
290 J+
52 J-
98 J+
260
450
20 U
Sulfate
14808-79-8
N
250000
02L
/L
540 J
540 J
9200
9400
11300
13600
2000
1200
1600
Sulfide
18496-25-8
N
-
lJ/L
100 U
100 U
100
100 U
100
100 U
100 U
100 U
100 U
Arsenic
7440-38-2
T
10
02L
/L
Chromium
7440-47-3
T
10
02L
Ng/L
Iron
7439-89-6
T
300
02L
/L
Manganese
7439-96-5
D
-
Ng/L
Manganese
7439-96-5
T
50
02L
/L
As III
7784-46-5
T
-
Ng/L
As V
10103-60-3
T
/L
Chromium VI
18540-29-9
D
0.07
DHHS
I Ng/L
Fe II
1345-25-1
T
/L
Se IV
10102-18-8
T
Ng/L
Se VI
13410-01-0
T
/L
Page 5 of 10

Table 2-7 Groundwater Analytical Results Upgradient of Source Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
GWA-6S
GWA-6S
GWA-7D
GWA-7D
GWA-7S
GWA-7S
GWA-8D
GWA-8D
GWA-8S
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
7/17/2015
9/30/2015
7/16/2015
10/1/2015
7/16/2015
10/1/2015
7/20/2015
10/1/2015
7/21/2015
N
N
N
N
N
N
N
N
N
GWA-6S
MA-GWA-6S-NS-3Q15
GWA-7D
MA-GWA-7D-NS-3Q15
GWA-7S
MA-GWA-7S-NS-3Q15
GWA-8D
MA-GWA-8D-NS-3Q15
GWA-8S
Constituent
CAS RN
Fractio
n
Criteria
Min (range
oni
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Dissolved Oxygen
DO
N
m /L
6
5.44
4.2
3.35
6
0.48
5.2
5.31
6.6
Temperature
TEMP
N
Deg C
24.2
22.2
18.7
16.2
20.8
16.2
21.1
18.12
21.6
H
PH
N
6.5
8.5
02L
SU
5.9
5.87
6.4
6.45
6.5
9.27
6.4
6.2
6
Turbidity, field
TURB
N
-
-
NTU
2.4
6.68
8.6
3.67
70.4
5.47
10
9.41
9.6
Specific Conductivity field
Sc
N
P S/cm
59.1
90
194.9
256.9
213.6
245.8
103
100
80.1
Oxidation Reduction Potential
ORP
N
my
24
178.3
158.8
125.2
86
34.7
172
-94.6
188.1
GW Depth TOC
GW DEPTH-TOC
N
ft
44.38
14.78
17.53
37.77
Notes:
pm = micron
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
mg/L = milligrams per liter
my = millivolts
NTU - nephelometric turbidity units
pCi/L = picocuries per liter
SU = standard unit
J = laboratory estimated concentration
J- = estimated concentration, biased low
J+ = estimated concentration, biased high
U = results not detected at concentrations which equal the laboratory's method reporting limit
02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216
(amended effective January 2015)
02L = North Carolina groundwater standards as specified in T15A NCAC 02L
D = dissolved
Deg C = degree Celsius
DHHS = North Carolina Department of Health and Human Services
DO = dissolved oxygen
GW = groundwater
GWQS = groundwater quality standard
IMAC = Interim Maximum Allow Concentration
N = normal
NS = no standard
T = total
TDS = total dissolved solids
TOC = total organic carbon
Page 6 of 10

Table 2-7 Groundwater Analytical Results Upgradient of Source Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
GWA-8S
GWA-9BR
GWA-91BR
MW-11D
MW-11D
MW-11S
MW-11S
MW-12D
MW-12S
Round 2
Round 1
Round 2
Round 1
Round 1
Round 1
Round 1
Round 1
Round 1
10/1/2015
7/21/2015
9/28/2015
7/9/2015
7/15/2015
7/9/2015
7/15/2015
7/20/2015
7/20/2015
N
N
N
N
N
N
N
N
N
MA-GWA-8S-NS-3Q15
GWA-9BR
MA-GWA-9BR-NS-3Q1
MW-11D
MW-11D
MWAIIS
MW-11S
MW-12D
MW-12S
Constituent
CAS RN
Fractio
n
Criteria
Min (range
onl
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
N /L
100 U
100 U
100 U
100 U
100 U
100 U
100 U
Aluminum
7429-90-5
T
/L
560
200
69 J
830
160
1800
130
Antimony
7440-36-0
D
Ng/L
0.5 U
0.26 J
0.5 U
0.53
0.97
0.5 U
0.5 U
Antimony
7440-36-0
T
1
IMAC
/L
0.5 U
0.38 J
0.5 U
0.45 J
0.34 J
0.5 U
0.5 U
Arsenic
7440-38-2
D
-
IJ/L
0.5 U
0.25 J
0.5 U
1.7
0.66
0.5 U
0.5 U
Arsenic
7440-38-2
T
10
02L
/L
0.5 U
0.2 J
0.5 U
1.6
0.32 J
0.42 J
0.5 U
Barium
7440-39-3
D
-
N /L
18
20
19
38
40
17
39
Barium
7440-39-3
T
700
02L
/L
1 24
23
19
64
42
46
45
Beryllium
7440-41-7
D
-
N /L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Beryllium
7440-41-7
T
4
IMAC
/L
0.2 U
0.2 U
0.2 U
0.093 J
0.2 U
0.084 J
0.2 U
Boron
7440-42-8
D
-
lJ/L
50 U
88
50 U
50 U
50 U
50 U
50 U
Boron
7440-42-8
T
700
02L
/L
50 U
50 U
50 U
50 U
50 U
50 UJ
50 UJ
Cadmium
7440-43-9
D
-
Ng/L
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
Cadmium
7440-43-9
T
2
02L
/L
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
Calcium
7440-70-2
T
-
N /L
5970
20200
9790
3460
2110
3540
474
Chromium
7440-47-3
D
/L
0.96
2
0.73
4.7
5.4
0.56
0.78
Chromium
7440-47-3
T
10
02L
u /L
3.3
2.5
0.68 J+
7.6
5.3
3
0.96
Cobalt
7440-48-4
D
/L
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.45 J
1.6
Cobalt
7440-48-4
T
1
IMAC
Ng/L
0.4 J
0.5 U
0.5 U
0.57
0.5 U
2.7
2
Copper
7440-50-8
D
/L
1.9
3.3 J+
1 U
1 UJ
3.1 J+
0.47 J+
0.6 J+
Copper
7440-50-8
T
1000
02L
IJ/L
4.1
0.35 J
0.49 J+
2
1.3
2.9
0.5 J
Iron
7439-89-6
D
/L
50 U
50 U
50 U
50 U
50 U
50 U
50 U
Iron
7439-89-6
T
300
02L
lJ/L
830
180
82
1000
140
2900
190
Lead
7439-92-1
D
/L
0.1 U
0.41
0.1 U
0.1 U
0.1 U
0.1 U
0.1 U
Lead
7439-92-1
T
15
02L
Ng/L
0.24
0.11
0.052 J
1.3
0.11
1.3
0.13 J+
Magnesium
7439-95-4
T
/L
1500
3010
2910
1520
1230
1080
308
Manganese
7439-96-5
D
-
Ng/L
5 U
7.7
17
5 U
5 U
14
10
Manganese
7439-96-5
T
50
02L
/L
15
18
22
17
4.8 J
67
16
Mercury
7439-97-6
D
-
Ng/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Mercury
7439-97-6
T
1
02L
/L
0.2 U
0.2 U
0.2 U
0.076 J+
0.079 J+
0.2 U
0.2 U
Methane
74-82-8
N
N /L
1 J+
2.8 J
0.92 J+
10 J+
11.8 J+
10 U
0.81 J
Molybdenum
7439-98-7
D
/L
0.14 J
1.3
0.57
1.3
0.29 J
0.82
0.5 U
Molybdenum
7439-98-7
T
N /L
0.17 J
1.3
0.96
1.2
0.15 J
0.85
0.5 U
Nickel
7440-02-0
D
/L
0.21 J
0.21 J
0.21 J
0.5 U
1.1
1.3
0.65
Nickel
7440-02-0
T
100
02L
Ng/L
1.4
0.41 J
1.8
1.5
0.47 J
2.6
0.7
Potassium
7440-09-7
T
/L
5000 U
3800 J
5000 U
5000 U
5000 U
2580 J
5000 U
Selenium
7782-49-2
D
-
N /L
0.5 U
0.5 U
0.5 U
0.33 J+
0.29 J+
0.5 U
0.5 U
Selenium
7782-49-2
T
20
02L
/L
0.5 U
0.5 U
0.5 U
0.24 J
0.5 U
0.28 J
0.5 U
Sodium
7440-23-5
T
-
N /L
7620
7630
7420
6210
5360
5990
2520 J
Strontium
7440-24-6
D
/L
170
94
60
110
63
170
28
Strontium
7440-24-6
T
Ng/L
170
94
61
120
55
190
31
Thallium
7440-28-0
D
/L
0.1 U
0.1 U
0.027 J
0.1 U
0.1 U
0.1 U
0.038 J
Thallium
7440-28-0
T
0.2
IMAC
lJ/L
0.023 J
0.1 U
0.1 U
0.1 U
0.1 U
0.035 J
0.044 J
Vanadium
7440-62-2
D
/L
3.4
3.7
3.3
21.9
2.4 J+
0.48 J
1 U
Vanadium
7440-62-2
T
0.3
IMAC
Ng/L
5.5
3.9
3
23.8
2.5
4.6
0.51 J
Zinc
7440-66-6
D
/L
13
10 U
10 U
3.9 J
5.7 J
IOU
5.5 J
Zinc
7440-66-6
T
1000
02L
N /L
23
23
6 J
13
4.2 J
17
3.5 J
Total Dissolved Solids
TDS
N
500000
02L
/L
72000
116000
51000
79000
49000
72000
34000
Total Organic Carbon
TOC
N
-
N /L
1000 U
1000 U
1000 U
1000 U
8600
1000 U
1000 U
Total Suspended Solids
TSS
N
/L
67200
12200
2500 U
147000
8900
32000
8600
Alkalinity, CO3
ALK-CO3
N
Ng/L
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
/L
30800
55500
42300
19600
13300
19400
6300
Alkalinity, lab
ALK-LAB
N
Ng/L
30800
55500
42300
19600
13300
19400
6300
Chloride
16887-00-6
N
250000
02L
/L
4600
4500
4500
2000
2600
800 J
1000 J
Nitrogen, NO2 plus NO3
NO2-NO3
N
-
N /L
20 U
1800
1700
290
610
20 U
22
Sulfate
14808-79-8
N
250000
02L
/L
1000 U
4900
1100
1200
1000 U
4000
650 J
Sulfide
18496-25-8
N
-
lJ/L
100 U
100 U
100 UJ
100 U
100 U
100 U
100 U
Arsenic
7440-38-2
T
10
02L
/L
-
-
-
0.723 J+
0.353 J+
0.693 J+
0.5 UJ
Chromium
7440-47-3
T
10
02L
Ng/L
6.23 J+
6 J+
1.89 J+
1.04 J+
Iron
7439-89-6
T
300
02L
/L
299
69.5 J+
484
66.4 J+
Manganese
7439-96-5
D
-
Ng/L
2 U
2 U
11.5
11.6
Manganese
7439-96-5
T
50
02L
/L
11
2.6
36.1
15.9
As III
7784-46-5
T
-
Ng/L
0.899 J+
0.385 J+
0.5 UJ
0.5 UJ
As V
10103-60-3
T
/L
1 UJ
-
1 UJ
-
0.693 J+
0.5 UJ
Chromium VI
18540-29-9
D
0.07
DHHS
Ng/L
-
4.6
-
4
0.25
0.5
Fe II
1345-25-1
T
/L
30 U
-
30 U
-
30 U
30 U
Se IV
10102-18-8
T
Ng/L
2 U
2 U
2 U
2 U
Se VI
13410-01-0
1 T
/L
1
2 U
2 U
2 U
2 U
Page 7 of 10

Table 2-7 Groundwater Analytical Results Upgradient of Source Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
GWA-8S
GWA-9BR
GWA-91BR
MW-11D
MW-11D
MW-11S
MW-11S
MW-12D
MW-12S
Round 2
Round 1
Round 2
Round 1
Round 1
Round 1
Round 1
Round 1
Round 1
10/1/2015
7/21/2015
9/28/2015
7/9/2015
7/15/2015
7/9/2015
7/15/2015
7/20/2015
7/20/2015
N
N
N
N
N
N
N
N
N
MA-GWA-8S-NS-3Q15
GWA-9BR
MA-GWA-9BR-NS-3Q1
MW-11D
MW-11D
MW-11S
MW-11S
MW-12D
MW-12S
Constituent
CAS RN
Fractio
n
Criteria
Min (range
oni
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Dissolved Oxygen
DO
N
m /L
6.64
5.4
5.88
6.4
6
3.85
5.75
Temperature
TEMP
N
-
-
Deg C
19.54
19.3
19.19
21.2
38.1
24.1
23.7
H
PH
N
6.5
8.5
02L
SU
5.78
8.6
6.24
7.1
5.9
6.23
5.56
Turbidity, field
TURB
N
-
-
NTU
9.12
7.9
2.49
33.6
8.4
50.08
7.53
Specific Conductivity field
Sc
N
P S/cm
80
163.4
140
59.5
53.4
54.3
20.4
Oxidation Reduction Potential
ORP
N
my
-79.6
-19.5
-100
44.1
160.9
158.5
325.3
GW Depth TOC
GW_DEPTH-TOC
N
ft
35.44
3.96
Notes:
pm = micron
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
mg/L = milligrams per liter
my = millivolts
NTU - nephelometric turbidity units
pCi/L = picocuries per liter
SU = standard unit
J = laboratory estimated concentration
J- = estimated concentration, biased low
J+ = estimated concentration, biased high
U = results not detected at concentrations which equal the laboratory's method reporting limit
02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216
(amended effective January 2015)
02L = North Carolina groundwater standards as specified in T15A NCAC 02L
D = dissolved
Deg C = degree Celsius
DHHS = North Carolina Department of Health and Human Services
DO = dissolved oxygen
GW = groundwater
GWQS = groundwater quality standard
IMAC = Interim Maximum Allow Concentration
N = normal
NS = no standard
T = total
TDS = total dissolved solids
TOC = total organic carbon
Page 8 of 10

Table 2-7 Groundwater Analytical Results Upgradient of Source Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
MW-13D
MW-13S
Round 1
Round 1
7/19/2015
7/20/2015
N
N
MW-13D
MW-13S
Constituent
CAS RN
Fractio
n
Criteria
Min (range
onl
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
N /L
100 U
100 U
Aluminum
7429-90-5
T
/L
160
360
Antimony
7440-36-0
D
Ng/L
0.32 J
0.5 U
Antimony
7440-36-0
T
1
IMAC
/L
0.73
0.5 U
Arsenic
7440-38-2
D
-
lJ/L
0.5 U
0.5 U
Arsenic
7440-38-2
T
10
02L
/L
0.5 U
0.14 J
Barium
7440-39-3
D
-
N /L
44
35
Barium
7440-39-3
T
700
02L
/L
52
46
Beryllium
7440-41-7
D
-
lJ/L
0.2 U
0.2 U
Beryllium
7440-41-7
T
4
IMAC
/L
0.2 U
0.2 U
Boron
7440-42-8
D
-
lJ/L
50 U
50 U
Boron
7440-42-8
T
700
02L
/L
50 U
50 UJ
Cadmium
7440-43-9
D
-
Ng/L
0.08 U
0.08 U
Cadmium
7440-43-9
T
2
02L
/L
0.08 U
0.08 U
Calcium
7440-70-2
T
-
lJ/L
7410
6620
Chromium
7440-47-3
D
/L
1 J+
1
Chromium
7440-47-3
T
10
02L
u /L
4.9 J+
1.2
Cobalt
7440-48-4
D
/L
0.5 U
0.5 U
Cobalt
7440-48-4
T
1
IMAC
Ng/L
0.19 J
0.15 J
Copper
7440-50-8
D
/L
1.1
0.22 J+
Copper
7440-50-8
T
1000
02L
N /L
2.7 J+
0.49 J
Iron
7439-89-6
D
/L
50 U
50 U
Iron
7439-89-6
T
300
02L
lJ/L
240 J+
420
Lead
7439-92-1
D
/L
0.1 UJ
0.1 U
Lead
7439-92-1
T
15
02L
Ng/L
0.29
0.13 J+
Magnesium
7439-95-4
T
/L
2240
2030
Manganese
7439-96-5
D
-
Ng/L
5 U
5 U
Manganese
7439-96-5
T
50
02L
/L
8.6
14
Mercury
7439-97-6
D
-
Ng/L
0.2 U
0.2 U
Mercury
7439-97-6
T
1
02L
/L
0.2 U
0.2 U
Methane
74-82-8
N
lJ/L
1.6 J+
2 J
Molybdenum
7439-98-7
D
/L
0.6 J+
0.73
Molybdenum
7439-98-7
T
N /L
0.74
0.68
Nickel
7440-02-0
D
/L
0.5 U
0.5 U
Nickel
7440-02-0
T
100
02L
Ng/L
0.43 J+
0.24 J
Potassium
7440-09-7
T
/L
5000 U
5000 U
Selenium
7782-49-2
D
-
N /L
0.5 U
0.5 U
Selenium
7782-49-2
T
20
02L
/L
0.5 U
0.5 U
Sodium
7440-23-5
T
-
N /L
7360
7130
Strontium
7440-24-6
D
/L
66
62
Strontium
7440-24-6
T
Ng/L
71
68
Thallium
7440-28-0
D
/L
0.1 U
0.1 U
Thallium
7440-28-0
T
0.2
IMAC
N /L
0.1 U
0.1 U
Vanadium
7440-62-2
D
/L
4.5
4
Vanadium
7440-62-2
T
0.3
IMAC
Ng/L
5.9
4.8
Zinc
7440-66-6
D
/L
15
10 U
Zinc
7440-66-6
T
1000
02L
N /L
23 J+
3.2 J
Total Dissolved Solids
TDS
N
500000
02L
/L
90000
90000
Total Organic Carbon
TOC
N
-
N /L
1000 U
7700
Total Suspended Solids
TSS
N
/L
8700
14400
Alkalinity, CO3
ALK-CO3
N
Ng/L
5000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
/L
30800
26700
Alkalinity, lab
ALK-LAB
N
-
Ng/L
30800
26700
Chloride
16887-00-6
N
250000
02L
/L
4300
3800
Nitrogen, NO2 plus NO3
NO2-NO3
N
-
lJ/L
1700
1500
Sulfate
14808-79-8
N
250000
02L
/L
760 J
1000 U
Sulfide
18496-25-8
N
-
N /L
100 U
100 U
Arsenic
7440-38-2
T
10
02L
/L
-
0.5 UJ
Chromium
7440-47-3
T
10
02L
Ng/L
4.74 J+
Iron
7439-89-6
T
300
02L
/L
81.5 J+
Manganese
7439-96-5
D
-
Ng/L
2.23J+
Manganese
7439-96-5
T
50
02L
/L
3 J+
As III
7784-46-5
T
-
Ng/L
0.5 UJ
As V
10103-60-3
T
/L
0.5 UJ
Chromium VI
18540-29-9
D
0.07
DHHS
Ng/L
0.79
Fe II
1345-25-1
T
/L
30 U
Se IV
10102-18-8
T
Ng/L
2 U
Se VI
13410-01-0
1 T
I
I
pg/L
1
2 U
Page 9 of 10

Table 2-7 Groundwater Analytical Results Upgradient of Source Areas - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
MW-13D
MW-13S
Round 1
Round 1
7/19/2015
7/20/2015
N
N
MW-13D
MW-13S
Constituent
CAS RN
Fractio
n
Criteria
Min (range
onl
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Dissolved Oxygen
DO
N
m /L
4
5.1
Temperature
TEMP
N
-
-
Deg C
25.3
19.9
H
PH
N
6.5
8.5
02L
SU
6.6
6.3
Turbidity, field
TURB
N
NTU
9.5
9.1
Specific Conductivity field
Sc
N
P S/cm
95.2
88.8
Oxidation Reduction Potential
ORP
N
my
-4.2
25.9
GW Depth TOC
GW DEPTH -TO
N
ft
Notes:
pm = micron
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
mg/L = milligrams per liter
my = millivolts
NTU - nephelometric turbidity units
pCi/L = picocuries per liter
SU = standard unit
J = laboratory estimated concentration
J- = estimated concentration, biased low
J+ = estimated concentration, biased high
U = results not detected at concentrations which equal the laboratory's method reporting limit
02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216
(amended effective January 2015)
02L = North Carolina groundwater standards as specified in T15A NCAC 02L
D = dissolved
Deg C = degree Celsius
DHHS = North Carolina Department of Health and Human Services
DO = dissolved oxygen
GW = groundwater
GWQS = groundwater quality standard
IMAC = Interim Maximum Allow Concentration
N = normal
NS = no standard
T = total
TDS = total dissolved solids
TOC = total organic carbon
Page 10 of 10

Table 2-8 Groundwater Analytical Results Beneath and Adjacent to Ash Basin - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AB-3D
AB-3D
AB-4D
AB-4D
AB-4D
AB-4D
AB-513R
AB-5BR
AB-5D
Round 1
Round 2
Round 1
Round 2
Round 2
Round 2
Round 1
Round 2
Round 1
7/11/2015
9/30/2015
7/14/2015
10/1/2015
10/1/2015
10/1/2015
7/17/2015
10/1/2015
7/14/2015
N
N
N
N
FD
FD
N
N
N
AB-3D
MA-AB-3D-NS-3Q1
AB-4D
MA-AB-4D-NS-3Q15
MA-AB-4D-FD 0.1-3Q1
MA-AB-4D-FD-3Q15
AB-5BR
MA-AB-5BR-NS-3Q15
AB-5D
Constituent
CAS RN
Fractio
n
Criteria
Min (range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
/L
100 U
100 U
100 U
100 U
100 U
100 U
100 U
100 U
100 U
Aluminum
7429-90-5
T
/L
260
61 J
190
100 U
-
100 U
92 J
100 U
4700
Antimony
7440-36-0
D
/L
0.63
0.5 U
0.21 J
0.5 U
0.5 U
0.5 U
0.17 J
0.5 U
0.5 U
Antimony
7440-36-0
T
1
IMAC
/L
0.57
0.5 U
0.17 J
0.5 U
-
0.5 U
0.19 J
0.5 U
0.16 J
Arsenic
7440-38-2
D
/L
0.78 J+
0.13 J
0.39 J
0.22 J
0.27 J
0.24 J
1.5
0.52
1.2
Arsenic
7440-38-2
T
10
02L
/L
0.81 J+
0.16 J
0.43 J
0.25 J
-
0.24 J
1.7
0.66 J+
2.1 J+
Barium
7440-39-3
D
/L
150
130
69
74
74
74
280
290
280
Barium
7440-39-3
T
700
02L
/L
160
140
78
71
-
74
300
280
420
Beryllium
7440-41-7
D
/L
0.2 U
0.2 U
0.087 J
0.069 J
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Beryllium
7440-41-7
T
4
IMAC
/L
0.2 U
0.2 U
0.09 J
0.2 U
-
0.2 U
0.2 U
0.1 J
0.1 J
Boron
7440-42-8
D
/L
160 J+
160
360
430
420
430
50 U
50 U
33 J
Boron
7440-42-8
T
700
02L
/L
170
160
380
390
-
420
50 U
50 UJ
34 J
Cadmium
7440-43-9
D
/L
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
Cadmium
7440-43-9
T
2
02L
/L
0.08 U
0.08 U
0.08 UJ
0.08 U
-
0.08 U
0.08 U
0.08 U
0.08 UJ
Calcium
7440-70-2
T
-
u /L
37800
33900
11600
10800
-
10900
40400
37100
26600
Chromium
7440-47-3
D
/L
0.68 J+
0.4 J
0.21 J+
0.2 J
0.5 U
0.22 J
0.55
0.3 J
0.53 J+
Chromium
7440-47-3
T
10
02L
/L
1.6 J+
0.41 J+
0.71 J+
0.31 J
-
0.32 J
2
0.42 J+
3.4
Cobalt
7440-48-4
D
/L
0.45 J
0.15 J
0.36 J
0.38 J
0.37 J
0.34 J
8.2
4.3
8.9
Cobalt
7440-48-4
T
1
IMAC
/L
0.5 J
0.18 J
0.4 J
0.34 J
-
0.35 J
7.9
4.8
9.4
Copper
7440-50-8
D
/L
1 U
0.29 J
1 U
0.58 J
19.4
1.5
3.7 J+
1 U
1.4 J+
Copper
7440-50-8
T
1000
02L
/L
0.5 J+
0.43 J
0.54 J+
0.34 J
-
0.23 J
1 J
0.22 J+
1.3
Iron
7439-89-6
D
/L
110
27 J
1700
1800
1700
1800
660
550
4600
Iron
7439-89-6
T
300
02L
/L
450
95
1900
1700
-
1800
900
650
10900
Lead
7439-92-1
D
/L
0.063 J
0.1 U
0.1 U
0.1 U
0.74
0.1 U
0.44
0.1 U
0.31
Lead
7439-92-1
T
15
02L
/L
0.23 J+
0.085 J
0.16 J+
0.1 U
-
0.1 U
0.058 J+
0.1 U
0.82
Magnesium
7439-95-4
T
/L
16700
16600
5920
5840
-
5870
14300
14900
11400
Manganese
7439-96-5
D
/L
270
77
79
81
81
82
610
350
1700
Manganese
7439-96-5
T
50
02L
/L
260
76
85
80
-
79
650
340
1800
Mercury
7439-97-6
D
/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 UJ
0.2 U
Mercury
7439-97-6
T
1
02L
/L
0.2 U
0.2 U
0.2 U
0.2 U
-
0.2 U
0.2 U
0.2 U
0.2 U
Methane
74-82-8
N
-
N /L
1.2 J
1.4 J+
21.3
3.4 J+
-
8.4 J+
2.5 J
4 J+
18.8 J+
Molybdenum
7439-98-7
D
/L
0.83 J+
0.33 J
0.11 J
0.5 U
0.5 U
0.5 U
1.8
0.39 J
2.3
Molybdenum
7439-98-7
T
/L
0.77 J+
0.29 J
0.18 J+
0.5 U
-
0.5 U
2
0.49 J
2.3
Nickel
7440-02-0
D
/L
3.8
2.2
1.1
1
1
1
9.2
8 J+
7.3
Nickel
7440-02-0
T
100
02L
/L
4.1
2.1 J+
1.3
0.96
-
1.1
9.8
8.7
8.1
Potassium
7440-09-7
T
/L
7160
5630
4130 J
4250 J
-
4270 J
7740
7030
6920
Selenium
7782-49-2
D
/L
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.44 J
0.5 U
0.2 J
Selenium
7782-49-2
T
20
02L
/L
0.5 U
0.5 U
0.5 U
0.5 U
-
0.5 U
0.51
0.2 J
0.5 U
Sodium
7440-23-5
T
/L
19200
18000
9930
10200
-
10300
30500
18000
21100
Strontium
7440-24-6
D
/L
1100
1200
260
250
250
250
1600
1800
1600
Strontium
7440-24-6
T
/L
1200
1200
270
250
-
250
1700
1700
1700
Thallium
7440-28-0
D
/L
0.044 J
0.018 J
0.1 U
0.1 U
0.1 U
0.1 U
0.021 J
0.1 U
0.1 U
Thallium
7440-28-0
T
0.2
IMAC
/L
0.02 J
0.041 J
0.1 UJ
0.1 U
0.1 U
0.1 U
0.1 U
0.02 J+
Vanadium
7440-62-2
D
/L
1.5
2.2
1 U
1 U
1 U
1 U
0.44 J
0.35 J
0.52 J
Vanadium
7440-62-2
T
0.3
IMAC
/L
2.3
2.2 J+
0.52 J
1 U
-
1 U
0.76 J
0.31 J
3.4
Zinc
7440-66-6
D
/L
38
IOU
10 U
10 U
10 U
IOU
70
12
10 U
Zinc
7440-66-6
T
1000
02L
/L
29
2.9 J+
3.2 J
9.8 J
-
10 U
68
14
72
Total Dissolved Solids
TDS
N
500000
02L
/L
290000
273000
156000
143000
141000
352000
295000
240000
Total Organic Carbon
TOC
N
/L
38200
35300
1000 U
1000 U
1000 U
5000
1000 U
1200
Total Suspended Solids
TSS
N
/L
14900
2500 U
5600 U
2500 U
5000 U
4500
16700 U
77600
Alkalinity, CO3
ALK-CO3
N
/L
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
/L
104000
94300
38400
34600
33600
124000
109000
150000
Alkalinity, lab
ALK-LAB
N
/L
104000
94300
38400
34600
33600
124000
109000
150000
Chloride
16887-00-6
N
250000
02L
/L
4500
4700
8200
8500 J+
8400 J+
5100
2800
4400
Nitrogen, NO2 plus NO3
NO2-NO3
N
/L
20 U
49
20 UJ
20 U
15 J
20 U
20 UJ
20 UJ
Sulfate
14808-79-8
N
250000
02L
/L
90000
93600
33300
28900 J+
29400 J+
86400
85500
18800
Sulfide
18496-25-8
N
/L
100 U
100 U
100 U
100 UJ
100 UJ
100 U
100 UJ
100 U
Arsenic
7440-38-2
T
10
02L
/L
-
-
0.875 J+
-
-
-
-
-
Chromium
7440-47-3
T
10
02L
/L
3.61 J+
Iron
7439-89-6
T
300
02L
/L
1690 J+
Manganese
7439-96-5
D
/L
71.7 J+
Manganese
7439-96-5
T
50
02L
/L
85.3 J+
As III
7784-46-5
T
-
Pg/L
0.623 J+
As V
10103-60-3
T
/L
0.253 J+
Chromium VI
18540-29-9
D
0.07
DHHS
/L
0.02 U
Fe II
1345-25-1
T
/L
117 J+
Se IV
10102-18-8
T
/L
2 U
Page 1 of 12

Table 2-8 Groundwater Analytical Results Beneath and Adjacent to Ash Basin - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AB-3D
AB-3D
AB-4D
AB-4D
AB-4D
AB-4D
AB-5BR
AB-5BR
AB-5D
Round 1
Round 2
Round 1
Round 2
Round 2
Round 2
Round 1
Round 2
Round 1
7/11/2015
9/30/2015
7/14/2015
10/1/2015
10/1/2015
10/1/2015
7/17/2015
10/1/2015
7/14/2015
N
N
N
N
FD
FD
N
N
N
AB-3D
MA-AB-3D-NS-3Q1
AB-4D
MA-AB-4D-NS-3Q15
MA-AB-4D-FD 0.1-3Q1
MA-AB-4D-FD-3Q15
AB-5BR
MA-AB-5BR-NS-3Q15
AB-5D
Constituent
CAS RN
Fractio
n
Criteria
Min (range
onl
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Se VI
13410-01-0
T
/L
-
-
2 U
-
-
-
-
Dissolved Oxygen
DO
N
m /L
0.3
0.6
0.2
0.36
0.7
0.7
1.78
Temperature
TEMP
N
-
-
Deg C
28.4
20.7
21.9
25.06
25.7
19.1
28.2
H
PH
N
6.5
8.5
02L
SU
6.3
6.11
6.3
6.24
6.1
5.54
5.9
Turbidity, field
TURB
N
-
-
NTU
7.5
4.86
6.1
2.9
4
3.02
26.66
,Specific Conductivity field
Sc
NPS/cm
712
423.6
177.2
150
519
410
650
Oxidation Reduction Potential
ORP
N
mV
44.9
118.8
12.1
29.8
233
33
91.5
GW Depth TOC
GW DEPTH -TO
N
ft
-
17.95
1 16.15
13.75
Notes:
pm = micron
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
mg/L = milligrams per liter
mV = millivolts
NTU - nephelometric turbidity units
pCi/L = picocuries per liter
SU = standard unit
J = laboratory estimated concentration
J- = estimated concentration, biased low
J+ = estimated concentration, biased high
U = results not detected at concentrations which equal the laboratory's method reporting limit
02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216
(amended effective January 2015)
02L = North Carolina groundwater standards as specified in T15A NCAC 02L
D = dissolved
Deg C = degree Celsius
DHHS = North Carolina Department of Health and Human Services
DO = dissolved oxygen
GW = groundwater
GWQS = groundwater quality standard
IMAC = Interim Maximum Allow Concentration
N = normal
NS = no standard
T = total
TDS = total dissolved solids
TOC = total organic carbon
Page 2 of 12

Table 2-8 Groundwater Analytical Results Beneath and Adjacent to Ash Basin - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AB-5D
AB-6BR
AB-613R
AB-6D
AB-6D
AB-7D
AB-7D
AB-8D
AB-8D
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
10/1/2015
7/15/2015
10/1/2015
7/15/2015
10/1/2015
7/16/2015
9/30/2015
7/15/2015
9/28/2015
N
N
N
N
N
N
N
N
N
MA-AB-5D-NS-3Q15
AB-6BR
MA-AB-6BR-NS-3Q15
AB-6D
MA-AB-6D-NS-3Q15
AB-711)
MA-AB-7D-NS-3Q15
AB-8D
MA-AB-8D-NS-3Q15
Constituent
CAS RN
Fractio
n
Criteria
Min (range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
/L
100 U
100 J
350
100 U
100 U
700
100 U
100 U
100 U
Aluminum
7429-90-5
T
/L
140
340
340
200
65 J
2800
100 UJ
1800
83 J
Antimony
7440-36-0
D
/L
0.5 U
1.2
0.68
0.5 U
0.5 U
0.44 J
0.5 U
0.5 U
0.5 U
Antimony
7440-36-0
T
1
IMAC
/L
0.21 J
1.3
0.69
0.5 U
0.5 U
0.41 J
0.5 U
0.44 J
0.5 U
Arsenic
7440-38-2
D
/L
0.69
6.7
2
1.3 J+
0.42 J
2.3
0.51
0.61 J+
0.39 J
Arsenic
7440-38-2
T
10
02L
/L
0.86 J+
6.6
2
1.8 J+
0.54 J+
2.6
0.53
1.3 J+
0.31 J
Barium
7440-39-3
D
/L
360
44
160
160
160
70
190
70
110
Barium
7440-39-3
T
700
02L
/L
360
51
170
170
160
110
180
100
110
Beryllium
7440-41-7
D
/L
0.2 U
0.2 U
0.2 U
0.27
0.5
0.067
0.2 U
0.2 U
0.2 U
Beryllium
7440-41-7
T
4
IMAC
/L
0.2 U
0.2 U
0.2 U
0.3
0.51
0.067
0.2 U
0.11 J
0.2 U
Boron
7440-42-8
D
/L
26 J
93
31 J
5600
5500
25
40 J
50 UJ
50 U
Boron
7440-42-8
T
700
02L
/L
41 J+
93
43 J+
5500
5300
25
50 UJ
50 U
50 U
Cadmium
7440-43-9
D
/L
0.08 U
0.08 UJ
0.08 U
0.08 UJ
0.08 U
0.024
0.08 U
0.037 J+
0.08 U
Cadmium
7440-43-9
T
2
02L
/L
0.08 U
0.08 U
0.08 U
0.036 J
0.08 U
0.024
0.08 U
0.08 UJ
0.08 U
Calcium
7440-70-2
T
-
u /L
26800
34900
39500
68500
70200
34600
39500
57700
65600
Chromium
7440-47-3
D
/L
0.24 J
6
0.5 U
0.41 J+
0.19 J
1.5
0.4 J
0.26 J+
0.22 J
Chromium
7440-47-3
T
10
02L
/L
0.93 J+
7.4
1.4
1.2
0.34 J+
4.8
0.61 J+
5.9 J+
0.44 J+
Cobalt
7440-48-4
D
/L
8
0.5 U
0.22 J
2.1
1.9
0.13
1.1
0.2 J
0.25 J
Cobalt
7440-48-4
T
1
IMAC
/L
8.7
0.5 U
0.26 J
2.2
1.9
0.7
0.96
1.4
0.28 J
Copper
7440-50-8
D
/L
1 U
3
1 U
1 U
1 U
1.5
1 U
1 U
1 U
Copper
7440-50-8
T
1000
02L
/L
0.9 J+
1.3
0.36 J+
6.7
1.7 J+
3.7
1 UJ
4.3
1.2 J+
Iron
7439-89-6
D
/L
3200
50 U
120
5800
5900
25
540
50 U
50 U
Iron
7439-89-6
T
300
02L
/L
3400
240
26 J
5800
6000
2400
570 J+
1900
110
Lead
7439-92-1
D
/L
0.1 U
0.47
0.1 U
0.061 J
0.1 U
0.12
0.1 U
0.1 U
0.1 U
Lead
7439-92-1
T
15
02L
/L
0.14
0.33
0.1 U
0.11
0.1 U
0.38
0.1 U
1
0.14
Magnesium
7439-95-4
T
/L
11500
755
1180
8850
9280
4230
15400
5450
6790
Manganese
7439-96-5
D
/L
1400
5 U
9
550
600
2.5
280
360
520
Manganese
7439-96-5
T
50
02L
/L
1300
5.1
10
550
560
42
280
450
570
Mercury
7439-97-6
D
/L
0.2 UJ
0.2 U
0.2 UJ
0.2 U
0.2 UJ
0.09
0.2 U
0.2 U
0.2 U
Mercury
7439-97-6
T
1
02L
/L
0.2 U
0.2 UJ
0.2 U
0.2 UJ
0.2 U
0.07
0.2 U
0.2 UJ
0.2 U
Methane
74-82-8
N
-
N /L
6.6 J+
387
75.7
405
48
0.63 J+
1.8 J+
26.5
26.8
Molybdenum
7439-98-7
D
/L
0.72
13.6
5.4
0.77
0.38 J
14.3
7.8
5.2
3
Molybdenum
7439-98-7
T
/L
1
13.6
5.6
1.1
0.44 J
15.8
6.4
5.4
3.2
Nickel
7440-02-0
D
/L
6.8 J+
0.25 J
0.38 J+
54.3
53.3 J+
0.16
1.3
0.26 J
0.5 U
Nickel
7440-02-0
T
100
02L
/L
7.7
0.52
0.5 J
53.3
56.2
1.6
0.93
3.6 J+
0.26 J+
Potassium
7440-09-7
T
/L
5990
8420
32600
7610
6680
27200
7470
5200
5520
Selenium
7782-49-2
D
/L
0.5 U
2.3
0.46 J
0.5 U
0.5 U
1.5
0.5 U
0.5 U
0.5 U
Selenium
7782-49-2
T
20
02L
/L
0.21 J
2.7
0.44 J
0.5 U
0.5 U
1.8
0.5 U
0.5 U
0.5 U
Sodium
7440-23-5
T
/L
19100
39500
36200
13000
9580
40000
18900
15000
16300
Strontium
7440-24-6
D
/L
1700
1000
2600
3900
3800
990
1400
2200
2400
Strontium
7440-24-6
T
/L
1700
1100
2600
4200
3700
980
1200 J+
2200
2300
Thallium
7440-28-0
D
/L
0.1 U
0.1 U
0.1 U
0.1 U
0.1 U
0.015
0.1 U
0.1 U
0.1 U
Thallium
7440-28-0
T
0.2
IMAC
/L
0.1 U
0.1 UJ
0.1 U
0.019 J+
0.1 U
0.016 J
0.1 U
0.031 J+
0.1 U
Vanadium
7440-62-2
D
/L
0.51 J
6.9
2.8
0.44 J
1 U
50.2
0.58 J
1 U
1 U
Vanadium
7440-62-2
T
0.3
IMAC
/L
0.83 J
7.4
3
0.86 J
0.28 J
57.5
0.68 J
5.1
1 U
Zinc
7440-66-6
D
/L
3.5 J
10 UJ
10 U
15 J+
10 U
7.8 J
10 U
10 UJ
10 U
Zinc
7440-66-6
T
1000
02L
/L
19
10 U
10 U
9.9 J
2.6 J
8 J+
10 UJ
22
2.7 J
Total Dissolved Solids
TDS
N
500000
02L
/L
245000
281000
252000
361000
343000
274000
271000
322000
313000
Total Organic Carbon
TOC
N
/L
1200
9200
870 J
2900
1300
12000
1000 U
1200
1000
Total Suspended Solids
TSS
N
/L
5200 U
14500
2600 U
6900
5000 U
37700
5500 U
32200
2600
Alkalinity, CO3
ALK-CO3
N
/L
5000 U
5000 U
14800
5000 U
5000 U
33300
5000 U
5000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
/L
147000
5000 U
86100
214000
212000
138000
102000
95600
88700
Alkalinity, lab
ALK-LAB
N
/L
147000
5000 UJ
101000
214000
212000
171000
102000
95600
88700
Chloride
16887-00-6
N
250000
02L
/L
4300
12100
3100
4300
4300
7300 J
2100
3100
2800
Nitrogen, NO2 plus NO3
NO2-NO3
N
/L
20 UJ
10 J-
20 UJ
20 UJ
191
10 UJ
40 J+
20 UJ
20 UJ
Sulfate
14808-79-8
N
250000
02L
/L
21300
98600
63700
36800
33500
43700
-
124000
124000
Sulfide
18496-25-8
N
/L
100 UJ
100 U
100 UJ
100 U
100 UJ
100
100 U
100 U
180 J+
Arsenic
7440-38-2
T
10
02L
/L
-
-
-
-
-
-
-
-
-
Chromium
7440-47-3
T
10
02L
/L
Iron
7439-89-6
T
300
02L
/L
Manganese
7439-96-5
D
/L
Manganese
7439-96-5
T
50
02L
/L
As III
7784-46-5
T
/L
As V
10103-60-3
T
/L
Chromium VI
18540-29-9
D
0.07
DHHS
/L
Fe II
1345-25-1
T
/L
Se IV
10102-18-8
T
/L
Page 3 of 12

Table 2-8 Groundwater Analytical Results Beneath and Adjacent to Ash Basin - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AB-5D
AB-6BR
AB-6BR
AB-6D
AB-6D
AB-7D
AB-7D
AB-811)
AB-8D
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
10/1/2015
7/15/2015
10/1/2015
7/15/2015
10/1/2015
7/16/2015
9/30/2015
7/15/2015
9/28/2015
N
N
N
N
N
N
N
N
N
MA-AB-5D-NS-3Q15
AB-6BR
MA-AB-6BR-NS-3Q15
A13-6D
MA-AB-6D-NS-3Q15
AB-711)
MA-AB-7D-NS-3Q15
AB-811)
MA-AB-8D-NS-3Q15
Constituent
CAS RN
Fractio
n
Criteria
Min (range
onl
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Se VI
13410-01-0
T
/L
Dissolved Oxygen
DO
N
m /L
0.45
0.4
0.32
0.4
0.24
0.4
0.29
0.2
0.68
Temperature
TEMP
N
Deg C
19.7
26.2
17.5
21.5
17.6
24.5
20.9
24.7
19.8
H
PH
N
6.5
8.5
02L
SU
5.61
10.4
11.45
5.9
5.71
10.7
7.17
8.27
8.15
Turbidity, field
TURB
N
-
-
NTU
8.42
5.6
2.21
5.8
2.05
7.9
8.58
17.2
6.23
,Specific Conductivity field
Sc
NPS/cm
340
440
770
529
490
467
700
403.5
730
Oxidation Reduction Potential
ORP
N
mV
-12.9
-88.4
411.6
-30.3
-10.9
36.4
-84
109.1
-151.9
GW Depth TOC
GW DEPTH-TOC
N
ft
7.7
22.35
1 19.8
22.49
9.73
Notes:
pm = micron
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
mg/L = milligrams per liter
mV = millivolts
NTU - nephelometric turbidity units
pCi/L = picocuries per liter
SU = standard unit
J = laboratory estimated concentration
J- = estimated concentration, biased low
J+ = estimated concentration, biased high
U = results not detected at concentrations which equal the laboratory's method reporting limit
02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216
(amended effective January 2015)
02L = North Carolina groundwater standards as specified in T15A NCAC 02L
D = dissolved
Deg C = degree Celsius
DHHS = North Carolina Department of Health and Human Services
DO = dissolved oxygen
GW = groundwater
GWQS = groundwater quality standard
IMAC = Interim Maximum Allow Concentration
N = normal
NS = no standard
T = total
TDS = total dissolved solids
TOC = total organic carbon
Page 4 of 12

Table 2-8 Groundwater Analytical Results Beneath and Adjacent to Ash Basin - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AB-913R
AB-9BR
AB-9D
AB-9D
AB-9S
AB-9S
AB-10D
AB-10D
AB-11D
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
7/17/2015
9/30/2015
7/16/2015
9/29/2015
7/16/2015
9/29/2015
7/18/2015
9/28/2015
7/17/2015
N
N
N
N
N
N
N
N
N
AB-913R
MA-AB-9BR-NS-3Q15
AB-9D
MA-AB-9D-NS-3Q15
AB-9S
MA-AB-9S-NS-3Q15
AB-10D
MA-AB-10D-NS-3Q15
AB-11D
Constituent
CAS RN
Fractio
n
Criteria
Min (range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
/L
100 U
100 U
50
100 U
52 J
60 J
100 U
100 U
100 U
Aluminum
7429-90-5
T
/L
53 J
100 UJ
310
64 J+
210
66 J+
660
61 J
410
Antimony
7440-36-0
D
/L
0.38 J
0.28 J
0.24 J
0.5 U
0.15
0.5 U
0.5 U
0.5 U
0.5 U
Antimony
7440-36-0
T
1
IMAC
/L
0.3 J
0.24 J
0.23 J
0.5 U
0.15
0.5 U
0.5 U
0.5 U
0.5 U
Arsenic
7440-38-2
D
/L
1
0.8
0.77
0.8
0.86
0.72
0.52
0.39 J
0.15 J
Arsenic
7440-38-2
T
10
02L
/L
0.9
0.72
0.95
0.82
0.95
0.69
1.2
0.6 J+
0.31 J
Barium
7440-39-3
D
/L
90
99
170
260
22
21
390
410
8.5
Barium
7440-39-3
T
700
02L
/L
95
98
190
230
26
20
420
420
12
Beryllium
7440-41-7
D
/L
0.2 U
0.2 U
0.067
0.2 U
0.067
0.2 U
0.2 U
0.2 U
0.2 U
Beryllium
7440-41-7
T
4
IMAC
/L
0.2 U
0.2 U
0.067
0.2 U
0.067
0.2 U
0.077 J
0.2 U
0.2 U
Boron
7440-42-8
D
/L
50 U
50 U
25
43 J
25
41 J
1200
1400
30 J
Boron
7440-42-8
T
700
02L
/L
50 U
50 UJ
25 J+
50 UJ
25
50 UJ
1200
1300
26 J
Cadmium
7440-43-9
D
/L
0.08 U
0.035 J
0.024
0.08 U
0.024
0.08 U
0.037 J
0.08 U
0.08 U
Cadmium
7440-43-9
T
2
02L
/L
0.08 U
0.08 U
0.024
0.08 U
0.044 J
0.08 U
0.052 J
0.08 U
0.08 U
Calcium
7440-70-2
T
-
u /L
36500
36000
8050
15200
3960
4050
73000
75800
15700
Chromium
7440-47-3
D
/L
2.7
2.5
0.79
0.5 U
1.2
1.4
0.32 J+
0.32 J
0.23 J+
Chromium
7440-47-3
T
10
02L
/L
4.4
4.6
6.3
0.66 J+
4.2
1.2 J+
2.5
0.44 J+
1.8
Cobalt
7440-48-4
D
/L
0.5 U
0.5 U
26.3
5.6
1.8
3.4
5.6
6.7
0.15 J
Cobalt
7440-48-4
T
1
IMAC
/L
0.5 U
0.5 U
28.1
6.2
2.2
2.8
6.6
6.6
0.34 J
Copper
7440-50-8
D
/L
1.2 J+
0.33 J
4.7
1 U
3.8
0.62 J
3.8 J+
1 U
0.42 J+
Copper
7440-50-8
T
1000
02L
/L
0.45 J
0.41 J+
0.84 J
0.47 J+
0.66 J
0.29 J+
4.2
0.24 J+
1.2
Iron
7439-89-6
D
/L
50 U
50 U
65
260
49 J
1300
1300
1700
50 U
Iron
7439-89-6
T
300
02L
/L
79
50 UJ
370
270J+
230
1200 J+
4400
1800
540
Lead
7439-92-1
D
/L
0.17
0.069 J
0.62
0.1 U
0.43
0.085 J
0.14 J+
0.1 U
0.15 J+
Lead
7439-92-1
T
15
02L
/L
0.1 UJ
0.1 U
0.2
0.06 J
0.1
0.1 U
2.2
0.089 J+
0.58
Magnesium
7439-95-4
T
/L
6460
4990
7990
10800
4430
4830
15700
16000
4580
Manganese
7439-96-5
D
/L
5 J
14
220
100
110
180
2300
2600
34
Manganese
7439-96-5
T
50
02L
/L
16
14
220
110
110
170
2300
2700
41
Mercury
7439-97-6
D
/L
0.2 U
0.2 U
0.09
0.2 U
0.09
0.2 U
0.2 UJ
0.2 U
0.2 U
Mercury
7439-97-6
T
1
02L
/L
0.2 U
0.2 U
0.07
0.2 U
0.07
0.2 U
0.2 U
0.2 U
0.2 U
Methane
74-82-8
N
-
N /L
1.8 J
2.6 J+
1.3 J
1.9 J+
1.9 J
71.9
338
79
0.82 J
Molybdenum
7439-98-7
D
/L
10.6
12.7
3.1
4.1
0.34 J
0.17 J
1.4
0.96
4.1
Molybdenum
7439-98-7
T
/L
11.2
10.7
3.9
3.5
0.43 J
0.13 J
1.2
1.6
3.8
Nickel
7440-02-0
D
/L
0.66
1
59.9
18.2
1.7
2.3
22.6
24.7
0.66 J+
Nickel
7440-02-0
T
100
02L
/L
1.3
0.68
65.9
18.8
2.9
2
24.3
23.8
1.4
Potassium
7440-09-7
T
/L
15400
15800
11400
9740
2500
5000 U
6180
5050
5000 U
Selenium
7782-49-2
D
/L
0.49 J
0.56
0.62
0.5 U
0.3 J
0.26 J
0.5 U
0.5 U
0.5 U
Selenium
7782-49-2
T
20
02L
/L
0.48 J
0.49 J
0.78
0.5 U
0.39 J
0.25 J
0.5 U
0.5 U
0.5 U
Sodium
7440-23-5
T
/L
14600
13800
9290
9190
3170 J
3410 J
10400
11300
12200
Strontium
7440-24-6
D
/L
240
250
240
320
44
47
2700
2800
700
Strontium
7440-24-6
T
/L
260
240 J+
260
280 J+
47
45 J+
2800
2900
720
Thallium
7440-28-0
D
/L
0.039 J
0.08 J
0.1 J+
0.1 U
0.062 J+
0.043 J
0.037 J
0.1 U
0.1 UJ
Thallium
7440-28-0
T
0.2
IMAC
/L
0.033 J
0.032 J
0.022 J
0.1 U
0.039 J
0.026 J
0.056 J
0.1 U
0.1 U
Vanadium
7440-62-2
D
/L
2.4
1.6
1.3
0.31 J
0.32 J
0.69 J
0.72 J
0.31 J
0.88 J
Vanadium
7440-62-2
T
0.3
IMAC
/L
2.4
1.4
2.5
0.42 J
1
0.47 J
9.2
0.41 J
2.3
Zinc
7440-66-6
D
/L
7 J
10 U
3.8 J
10 U
4.5 J
10 U
5.1 J
10 U
10 U
Zinc
7440-66-6
T
1000
02L
/L
10 U
10 UJ
4.1 J+
10 U
4 J+
10 U
8.2 J
10 UJ
10 J
Total Dissolved Solids
TDS
N
500000
02L
/L
167000
187000
143000
156000
53000 J
25000 U
334000
309000
116000
Total Organic Carbon
TOC
N
/L
680 J
1000 U
660 J
1000 U
610 J
1000 U
2000
870 J+
1000 U
Total Suspended Solids
TSS
N
/L
14000
5500 UJ
5200
3100
15400
2500 U
93100
2700
193000
Alkalinity, CO3
ALK-CO3
N
/L
4900 J
5000 U
1000
5000 U
1000
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
/L
55900
47900
69800
102000
28100
29900
240000
277000
69700
Alkalinity, lab
ALK-LAB
N
/L
60800 J-
47900
69800
102000
28100
29900
240000
277000
69700
Chloride
16887-00-6
N
250000
02L
/L
4300
3700
3000
2300
2400
2700
5100
5000
4200
Nitrogen, NO2 plus NO3
NO2-NO3
N
/L
20 U
16 J+
22 J-
20 UJ
630 J-
550
20 UJ
13 J+
180 J-
Sulfate
14808-79-8
N
250000
02L
/L
47500
76600
12900
9200
4600
4000
11000
11900
7600
Sulfide
18496-25-8
N
/L
100 U
100 U
100
100 U
100
100 U
100 U
100 U
100 U
Arsenic
7440-38-2
T
10
02L
/L
-
-
-
-
-
-
-
-
-
Chromium
7440-47-3
T
10
02L
/L
Iron
7439-89-6
T
300
02L
/L
Man anese
7439-96-5
D
/L
Man anese
7439-96-5
T
50
02L
/L
As III
7784-46-5
T
/L
As V
10103-60-3
T
/L
Chromium VI
18540-29-9
D
0.07
DHHS
/L
Fe II
1345-25-1
T
/L
Se IV
10102-18-8
T
/L
Page 5 of 12

Table 2-8 Groundwater Analytical Results Beneath and Adjacent to Ash Basin - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AB-9BR
AB-9BR
AB-9D
AB-9D
AB-9S
AB-9S
AB-10D
AB-10D
AB-11D
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
7/17/2015
9/30/2015
7/16/2015
9/29/2015
7/16/2015
9/29/2015
7/18/2015
9/28/2015
7/17/2015
N
N
N
N
N
N
N
N
N
AB-913R
MA-AB-9BR-NS-3Q15
AB-9D
MA-AB-9D-NS-3Q15
AB-9S
MA-AB-9S-NS-3Q15
AB-10D
MA-AB-10D-NS-3Q15
AB-11D
Constituent
CAS RN
Fractio
n
Criteria
Min (range
onl
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Se VI
13410-01-0
T
/L
Dissolved Oxygen
DO
N
m /L
0.3
0.45
0.3
0.29
1.8
0.77
0.2
0.23
2.3
Temperature
TEMP
N
Deg C
19.6
19.3
21.5
23.3
22.3
21.9
21.6
17.7
19.6
H
PH
N
6.5
8.5
02L
SU
9.6
10.27
6.4
6.73
5.5
5.85
6.2
6.13
6.8
Turbidity, field
TURB
N
-
-
NTU
7
7.47
11.5
7.72
2.9
5.51
3.5
7.64
10
,Specific Conductivity field
Sc
NPS/cm
298
590
170
360
62.9
140
526.6
569.2
178
Oxidation Reduction Potential
ORP
N
mV
-106.4
-25.6
18.8
-9.9
179.2
121.5
59.6
13.6
195.4
GW Depth TOC
GW DEPTH-TOC
N
ft
7.79
1 10.96
8.9
13.75
Notes:
pm = micron
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
mg/L = milligrams per liter
mV = millivolts
NTU - nephelometric turbidity units
pCi/L = picocuries per liter
SU = standard unit
J = laboratory estimated concentration
J- = estimated concentration, biased low
J+ = estimated concentration, biased high
U = results not detected at concentrations which equal the laboratory's method reporting limit
02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216
(amended effective January 2015)
02L = North Carolina groundwater standards as specified in T15A NCAC 02L
D = dissolved
Deg C = degree Celsius
DHHS = North Carolina Department of Health and Human Services
DO = dissolved oxygen
GW = groundwater
GWQS = groundwater quality standard
IMAC = Interim Maximum Allow Concentration
N = normal
NS = no standard
T = total
TDS = total dissolved solids
TOC = total organic carbon
Page 6 of 12

Table 2-8 Groundwater Analytical Results Beneath and Adjacent to Ash Basin - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AB-11D
AB-11S
AB-11S
AB-12D
AB-12D
AB-13D
AB-13D
AB-14D
AB-14D
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
9/28/2015
7/18/2015
9/28/2015
7/8/2015
9/29/2015
7/11/2015
9/28/2015
7/12/2015
9/28/2015
N
N
N
N
N
N
N
N
N
MA-AB-11D-NS-3Q15
AB-11S
MA-AB-11S-NS-3Q15
AB-12D
MA-AB-12D-NS-3Q15
AB-13D
MA-AB-13D-NS-3Q15
AB-14D
MA-AB-14D-NS-3Q15
Constituent
CAS RN
Fractio
n
Criteria
Min (range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
/L
100 U
100 U
100 U
71 J
53 J
100 U
100 U
56 J
100 U
Aluminum
7429-90-5
T
/L
50 J
7300
100 U
140
160
200
77 J
740
97 J
Antimony
7440-36-0
D
/L
0.5 U
0.5 U
0.5 U
0.83
0.19 J
0.53
0.5 U
0.48 J
0.5 U
Antimony
7440-36-0
T
1
IMAC
/L
0.5 U
2.5 U
0.5 U
0.54
0.53
0.97
0.5 U
0.66
0.5 U
Arsenic
7440-38-2
D
/L
0.13 J
0.5 U
0.5 U
1.3
2.4
0.76
0.42 J
0.51
0.3 J
Arsenic
7440-38-2
T
10
02L
/L
0.16 J+
2.8
0.14 J+
1.3 J+
3 J+
0.85
0.54
0.86 J+
0.25 J
Barium
7440-39-3
D
/L
16
13
12
170
140
180
210
130
130
Barium
7440-39-3
T
700
02L
/L
16
110
13
180
140
200
220
150
130
Beryllium
7440-41-7
D
/L
0.2U
0.2U
0.2U
0.2U
0.2U
0.2U
0.2U
0.2U
0.2U
Beryllium
7440-41-7
T
4
IMAC
/L
0.2 U
0.71 J
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Boron
7440-42-8
D
/L
50 U
50 U
50 U
3500
2900
50 UJ
46 J
130 J+
150
Boron
7440-42-8
T
700
02L
/L
50 U
50 U
50 U
3500
2900
50 U
26 J
130
140
Cadmium
7440-43-9
D
/L
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.033 J
0.08 U
Cadmium
7440-43-9
T
2
02L
/L
0.08 U
0.4 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.074 J
0.033 J
Calcium
7440-70-2
T
-
u /L
18400
1820
939
270000
232000
43500
43900
12400
13000
Chromium
7440-47-3
D
/L
0.26 J
0.26 J+
0.27 J
1 J+
1.7
0.65 J+
0.24 J
0.62
1.3
Chromium
7440-47-3
T
10
02L
/L
0.46 J+
4.4
0.5 UJ
1.7 J+
2.5
6.8
1.1 J+
3.4 J+
1.8 J+
Cobalt
7440-48-4
D
/L
0.13 J
1
0.93
0.32 J
0.5 U
1.5
1.1
0.32 J
0.5 U
Cobalt
7440-48-4
T
1
IMAC
/L
0.17 J
4.4
0.96
0.35 J
0.18 J
2.4
1.3
0.59
0.13 J
Copper
7440-50-8
D
/L
0.28 J
7.2 J+
0.27 J
1.3
1 U
1 U
1 U
0.26 J
1 U
Copper
7440-50-8
T
1000
02L
/L
1.1 J+
3.3 J
1 UJ
4.9
2.4 J+
1.7 J+
0.57 J+
5.3
3.4
Iron
7439-89-6
D
/L
50 U
50 U
58
50 U
50 U
260
490
240
55
Iron
7439-89-6
T
300
02L
/L
77
5900
85
120
160
570
620
1100
160
Lead
7439-92-1
D
/L
0.1 U
0.72 J+
0.1 U
0.05 J+
0.1 U
0.1 U
0.1 U
0.1 U
0.1 U
Lead
7439-92-1
T
15
02L
/L
0.12 J+
10.2
0.1 UJ
0.057 J
0,11 J+
0.14 J+
0.1 UJ
0.34
0.075 J
Magnesium
7439-95-4
T
/L
3530
703
396
11400
9500
8420
9040
3750
3620
Manganese
7439-96-5
D
/L
19
67
98
130
130
180
220
66
27
Manganese
7439-96-5
T
50
02L
/L
23
210
110
130
140
200
240
80
30
Mercury
7439-97-6
D
/L
0.2 U
0.2 UJ
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Mercury
7439-97-6
T
1
02L
/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Methane
74-82-8
N
-
N /L
1.5 J+
17.3 J+
16.1
25.9
22.8
14 J-
1.9 J+
1.5 J
1.3 J+
Molybdenum
7439-98-7
D
/L
1.2
0.5 U
0.5 U
8.3
0.83
3.9
1.5
0.47 J
0.17 J
Molybdenum
7439-98-7
T
/L
1.3
2.5 U
0.5 U
7.8
4.9
6.5
1.8
0.62 J+
0.18 J
Nickel
7440-02-0
D
/L
0.69
0.6
0.34 J
1.5 J+
0.92
0.6
0.42 J
2.7
1.1
Nickel
7440-02-0
T
100
02L
/L
1.1
3.7
0.32 J
1.2
1.3
1.1
0.71
3.2
1.3
Potassium
7440-09-7
T
/L
5000 U
3290 J
3410 J
8040
8730
18900
5460
2930 J
5000 U
Selenium
7782-49-2
D
/L
0.5 U
0.5 U
0.5 U
0.61
0.5 U
0.5 U
0.5 U
0.5 U
0.35 J
Selenium
7782-49-2
T
20
02L
/L
0.5 U
2.5 U
0.5 U
0.52
0.26 J
0.41 J
0.5 U
0.35 J
0.3 J
Sodium
7440-23-5
T
/L
9100
6530
6710
106000
113000
12200
10400
9860
9270
Strontium
7440-24-6
D
/L
1100
35
35
19800
16300
620
720
290
330
Strontium
7440-24-6
T
/L
1200
130
36
18700
15500
710
750
330
330
Thallium
7440-28-0
D
/L
0.1 U
0.1 U
0.1 U
0.025 J
0.1 U
0.1 U
0.1 U
0.026 J
0.1 U
Thallium
7440-28-0
T
0.2
IMAC
/L
0.018 J
0.11 J
0.1 U
0.1 U
0.1 U
0.02 J
0.1 U
0.081 J
0.1 U
Vanadium
7440-62-2
D
/L
0.87 J
1 U
0.3 J
2
1.3
0.43 J
1 U
1.5
1.5
Vanadium
7440-62-2
T
0.3
IMAC
/L
1
20.8
1 U
2.5 J+
1.7
1.1
1 U
3.3
1.5
Zinc
7440-66-6
D
-
/L
10 U
4.9 J
10 U
4.9 J
10 U
5.6 J
10 U
9 J+
10 U
Zinc
7440-66-6
T
1000
02L
/L
3.5 J+
23
5.4 J+
7.2 J+
6.4 J+
27
3 J+
35 J+
10 U
Total Dissolved Solids
TDS
N
500000
02L
/L
78000
56000
53000
1530000
15000000
231000
202000
114000
119000
Total Organic Carbon
TOC
N
-
/L
14100 J+
690 J
1000 UJ
35700
29800 J+
830 J
1000 UJ
1900
640 J
Total Suspended Solids
TSS
N
/L
2700 U
486000
5000 U
5600 U
5500
52000
2600 U
39300
2500 U
Alkalinity, CO3
ALK-CO3
N
/L
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
/L
72000
16800
17600
95100
131000
126000
162000
36900
43000
Alkalinity, lab
ALK-LAB
N
/L
72000
16800
17600
95100
131000
126000 J+
162000
36900
43000
Chloride
16887-00-6
N
250000
02L
/L
2100
1800
2100
464000
375000
3400
2200
1800
2100
Nitrogen, NO2 plus NO3
NO2-NO3
N
/L
230
34 J-
98 J+
20 UJ
20 UJ
20 U
20 UJ
51
87
Sulfate
14808-79-8
N
250000
02L
/L
4000
1200
1000J
219000
188000
26800
14900
22800
24000
Sulfide
18496-25-8
N
/L
100 U
100 UJ
100 U
100 U
9500
100 U
100 U
100 U
130 J-
Arsenic
7440-38-2
T
10
02L
/L
-
-
-
1.76 J+
-
-
-
-
-
Chromium
7440-47-3
T
10
02L
/L
2.31 J+
Iron
7439-89-6
T
300
02L
/L
251
Manganese
7439-96-5
D
/L
144
Manganese
7439-96-5
T
50
02L
/L
155
As III
7784-46-5
T
/L
0.701 J+
As V
10103-60-3
T
/L
1.05 J+
Chromium VI
18540-29-9
D
0.07
DHHS
/L
0.031
Fe II
1345-25-1
T
/L
-
Se IV
10102-18-8
1 T
/L
0.986 J
Page 7 of 12

Table 2-8 Groundwater Analytical Results Beneath and Adjacent to Ash Basin - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AB-11D
AB-11S
AB-11S
AB-12D
AB-12D
AB-13D
AB-13D
AB-14D
AB-14D
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
9/28/2015
7/18/2015
9/28/2015
7/8/2015
9/29/2015
7/11/2015
9/28/2015
7/12/2015
9/28/2015
N
N
N
N
N
N
N
N
N
MA-AB-11D-NS-3Q15
AB-11S
MA-AB-11S-NS-3Q15
AB-12D
MA-AB-12D-NS-3Q15
AB-13D
MA-AB-13D-NS-3Q15
AB-14D
MA-AB-14D-NS-3Q15
Constituent
CAS RN
Fractio
n
Criteria
Min (range
onl
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Se VI
13410-01-0
T
/L
0.789 J
-
-
-
-
-
Dissolved Oxygen
DO
N
m /L
3.73
0.5
0.89
0.4
0.22
0.5
0.36
1.2
1
Temperature
TEMP
N
Deg C
17.8
26.8
18.3
25.5
20.2
30.6
19.8
20.4
18.5
H
PH
N
6.5
8.5
02L
SU
5.75
5.5
5.76
7.2
7.88
7.6
7.37
5.9
5.66
Turbidity, field
TURB
N
-
-
NTU
8.36
13.8
4.1
7.8
8.29
13.8
5.92
8.9
6.96
,Specific Conductivity field
Sc
NPS/cm
167.5
46.7
53200
2120
2020
562
360
149.6
156.9
Oxidation Reduction Potential
ORP
N
mV
116.1
235.4
140.9
10
-283.9
148.1
122.4
89.4
55.1
GW Depth TOC
GW DEPTH -TO
N
ft
6.4
8.92
11.08
28.22
16.22
Notes:
pm = micron
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
mg/L = milligrams per liter
mV = millivolts
NTU - nephelometric turbidity units
pCi/L = picocuries per liter
SU = standard unit
J = laboratory estimated concentration
J- = estimated concentration, biased low
J+ = estimated concentration, biased high
U = results not detected at concentrations which equal the laboratory's method reporting limit
02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216
(amended effective January 2015)
02L = North Carolina groundwater standards as specified in T15A NCAC 02L
D = dissolved
Deg C = degree Celsius
DHHS = North Carolina Department of Health and Human Services
DO = dissolved oxygen
GW = groundwater
GWQS = groundwater quality standard
IMAC = Interim Maximum Allow Concentration
N = normal
NS = no standard
T = total
TDS = total dissolved solids
TOC = total organic carbon
Page 8 of 12

Table 2-8 Groundwater Analytical Results Beneath and Adjacent to Ash Basin - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AB-15BR
AB-15BR
AB-15D
AB-15D
AB-16D
AB-16D
AB-16S
AB-16S
AB-17D
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
7/13/2015
9/29/2015
7/13/2015
9/29/2015
7/17/2015
9/30/2015
7/17/2015
9/30/2015
7/12/2015
N
N
N
N
N
N
N
N
N
AB-15BR
MA-A13-15BR-NS-3Q15
AB-15D
MA-AB-15D-NS-3Q15
AB-16D
MA-AB-16D-NS-3Q15
AB-16S
MA-AB-16S-NS-3Q15
AB-17D
Constituent
CAS RN
Fractio
n
Criteria
Min (range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
/L
100 U
100 U
100 U
100 U
100 U
100 U
100 U
100 U
100 U
Aluminum
7429-90-5
T
/L
100 U
72 J
280
100 U
180
100 U
961
100 U
870 J+
Antimony
7440-36-0
D
/L
0.26 J
0.5 U
0.5 U
0.5 U
-
0.5 U
0.5 U
0.5 U
0.38 J
Antimony
7440-36-0
T
1
IMAC
/L
0.16 J
0.5 U
0.18 J
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.64
Arsenic
7440-38-2
D
/L
0.4 J
0.16 J
0.28 J
0.13 J
-
1.1
0.66
0.31 J
0.47 J
Arsenic
7440-38-2
T
10
02L
/L
0.43 J
0.22 J
0.62
0.12 J
0.12 J
1.1
0.65
0.19 J
1.5
Barium
7440-39-3
D
/L
120
130
210
260
140
180
61
48
26
Barium
7440-39-3
T
700
02L
/L
130
120
210
240
150
180
60
47
33
Beryllium
7440-41-7
D
/L
0.2U
0.2U
0.2U
0.2U
-
0.2U
0.2U
0.2U
0.2U
Beryllium
7440-41-7
T
4
IMAC
/L
0.2U
0.2U
0.2U
0.2U
0.2U
0.2U
0.2U
0.2U
0.2U
Boron
7440-42-8
D
/L
50 U
50 U
56
26 J
50 U
50 U
46 J
28 J
27 J+
Boron
7440-42-8
T
700
02L
/L
50 U
50 U
53
50 U
50 U
50 U
44 J
29 J
50 U
Cadmium
7440-43-9
D
/L
0.08 U
0.08 U
0.08 U
0.08 U
-
0.08 U
0.08 U
0.08 U
0.08 U
Cadmium
7440-43-9
T
2
02L
/L
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
Calcium
7440-70-2
T
-
u /L
62100
59600
56300
58200
35200
27400
11300
5270
23200
Chromium
7440-47-3
D
/L
0.54
0.5 U
0.33 J
0.5 U
-
0.3 J
0.2 J+
0.5 U
5.6
Chromium
7440-47-3
T
10
02L
/L
1.3
0.33 J+
2.6
0.47 J+
1.5
0.31 J+
0.38 J
0.25 J+
7.8
Cobalt
7440-48-4
D
/L
0.5 U
0.5 U
0.42 J
0.5 U
-
1
27
29.8
0.36 J
Cobalt
7440-48-4
T
1
IMAC
/L
0.5 U
0.5 U
0.56
0.5 U
4.7
0.96
22.6
23.8
2.5
Copper
7440-50-8
D
/L
0.37 J
1 U
1 U
1 U
-
1 U
4.3 J+
0.73 J
0.23 J
Copper
7440-50-8
T
1000
02L
/L
0.36 J
1 U
1.1
0.42 J
2.7
0.48 J
0.78 J
1.8
3
Iron
7439-89-6
D
/L
1200
2000
2600
2200
1400
2500
8700
3200
50 U
Iron
7439-89-6
T
300
02L
/L
1300
2100
2700
2200
2100
2700
5600
3200
640 J-
Lead
7439-92-1
D
/L
0.1 U
0.065 J
0.1 U
0.1 U
-
0.1 U
0.11 J+
0.1 U
0.1 U
Lead
7439-92-1
T
15
02L
/L
0.1 U
0.1 U
0.1 J
0.1 U
0.17
0.1 U
0.075 J
0.1 U
0.23
Magnesium
7439-95-4
T
/L
6850
7270
7150
7780
9530
6960
12700
5020
3060
Manganese
7439-96-5
D
/L
280
290
230
240
310
290
1500
1100
7
Manganese
7439-96-5
T
50
02L
/L
270
270
200
230
290
280
1400
1000
31
Mercury
7439-97-6
D
/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Mercury
7439-97-6
T
1
02L
/L
0.12 J+
0.2 U
0.16 J+
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.11 J
Methane
74-82-8
N
-
N /L
9.6 J
91
25.8
25.1
2 J
3 J+
678
78.6
2.4 J
Molybdenum
7439-98-7
D
/L
1.2
1.2
0.97
1
-
2.1
0.5 U
0.5 U
3.8
Molybdenum
7439-98-7
T
/L
1.2
1.1
1.5
1.1
1.9
1.9
0.5 U
0.5 U
4.6
Nickel
7440-02-0
D
/L
0.36 J
0.5 U
0.68
0.5 U
-
1.8
7.5
10
0.92
Nickel
7440-02-0
T
100
02L
/L
0.36 J
0.54
1
0.3 J
4.3
1.7 J+
6.3
8.3
2
Potassium
7440-09-7
T
/L
4490 J
4350 J
5500
4580 J
7710
4840 J
5000 U
5000 U
10300
Selenium
7782-49-2
D
/L
0.5 U
0.5 U
0.5 U
0.5 U
-
0.5 U
0.5 U
0.5 U
0.5 U
Selenium
7782-49-2
T
20
02L
/L
0.5 U
0.5 U
0.5 U
0.5 U
0.87
0.5 U
0.21 J
0.5 U
0.38 J
Sodium
7440-23-5
T
/L
10900
11600
9370
9450
18000
17400
3860 J
6740
9900
Strontium
7440-24-6
D
/L
1100
1100
590
690
520
410
240
110
170
Strontium
7440-24-6
T
/L
1100
980
590
610
510
420
260
110
200
Thallium
7440-28-0
D
/L
0.1 U
0.1 U
0.1 U
0.1 U
-
0.1 U
0.025 J+
0.032 J
0.022 J
Thallium
7440-28-0
T
0.2
IMAC
/L
0.1 U
0.1 U
0.1 U
0.1 U
0.021 J
0.1 U
0.033 J
0.02 J
0.023 J
Vanadium
7440-62-2
D
/L
1 U
1 U
0.3 J
1 U
-
1 U
1 U
1 U
2.2
Vanadium
7440-62-2
T
0.3
IMAC
/L
1 U
1 U
1.4
1 U
0.56 J
1 UJ
1 U
1 U
7.1
Zinc
7440-66-6
D
/L
11
10 U
10 U
10 U
13
IOU
3.3 J
7.2 J
10 U
Zinc
7440-66-6
T
1000
02L
/L
9.4 J
6.4 J
10 U
10 U
20
10 UJ
2.6 J
7.2 J
8.8 J
Total Dissolved Solids
TDS
N
500000
02L
/L
290000
276000
272000
248000
247000
205000
94000
66000
124000
Total Organic Carbon
TOC
N
/L
1000 U
1000 U
940 J
1000 U
1700
780 J
3700
1500
770 J
Total Suspended Solids
TSS
N
/L
2700 U
7400
9600
6600
14900
2900
22200
2500 U
743000
Alkalinity, CO3
ALK-CO3
N
/L
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
/L
142000
140000
163000
170000
102000
98700
85300
46900
77500
Alkalinity, lab
ALK-LAB
N
/L
142000
140000 J-
163000 J-
170000 J-
102000 J-
98700
85300
46900
77500 J+
Chloride
16887-00-6
N
250000
02L
/L
4200
2600
3400
3000
5200
4200
2900
4400
2400
Nitrogen, NO2 plus NO3
NO2-NO3
N
/L
20 UJ
13 J+
20 UJ
11 J+
20 UJ
15 J
20 UJ
21
57
Sulfate
14808-79-8
N
250000
02L
/L
61900
73300
28400
31200
61900
35100
4300
2200
13600
Sulfide
18496-25-8
N
/L
100 U
100 U
100 U
100 U
100 UJ
100 U
100 U
100 U
100 U
Arsenic
7440-38-2
T
10
02L
/L
0.404 J+
-
0.73 J+
-
-
-
-
-
-
Chromium
7440-47-3
T
10
02L
/L
3.48 J+
1.62
Iron
7439-89-6
T
300
02L
/L
1520
2890
Manganese
7439-96-5
D
/L
274
229
Manganese
7439-96-5
T
50
02L
/L
300
228
As III
7784-46-5
T
/L
0.357 J+
0.407 J+
As V
10103-60-3
T
/L
0.5 UJ
0.323 J+
Chromium VI
18540-29-9
D
0.07
DHHS
/L
0.02 U
0.02 UJ
Fe II
1345-25-1
T
/L
90 J+
350 J+
Se IV
10102-18-8
T
/L
2 U
2 U
Page 9 of 12

Table 2-8 Groundwater Analytical Results Beneath and Adjacent to Ash Basin - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AB-15BR
AB-15BR
AB-15D
AB-15D
AB-16D
AB-16D
AB-16S
AB-16S
AB-17D
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
7/13/2015
9/29/2015
7/13/2015
9/29/2015
7/17/2015
9/30/2015
7/17/2015
9/30/2015
7/12/2015
N
N
N
N
N
N
N
N
N
AB-15BR
MA-AB-15BR-NS-3Q15
AB-15D
MA-AB-15D-NS-3Q15
AB-16D
MA-AB-16D-NS-3Q15
AB-16S
MA-AB-16S-NS-3Q15
AB-17D
Constituent
CAS RN
Fractio
n
Criteria
Min (range
onl
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Se VI
13410-01-0
T
/L
2 U
-
2 U
-
-
-
-
-
-
Dissolved Oxygen
DO
N
m /L
0.4
0.39
0.1
0.37
0.2
0.36
0.9
0.39
2.8
Temperature
TEMP
N
-
-
Deg C
19.3
20.2
22.8
19
27.5
19.4
27.3
21.1
21.2
H
PH
N
6.5
8.5
02L
SU
7.2
7.13
6.9
6.95
6.6
6.81
5.9
5.46
7.6
Turbidity, field
TURB
N
-
-
NTU
7.7
5.63
9.7
7.24
10
2.33
12.6
1.25
21.4
,Specific Conductivity field
Sc
NPS/cm
376.9
441.3
364.5
425.1
380.9
429.3
205.1
115.5
158.4
Oxidation Reduction Potential
ORP
N
mV
-105.4
-132.1
-78.1
-111.4
-17.4
-87.4
51.3
99.9
51.3
GW Depth TOC
GW DEPTH-TOC
N
ft
18.42
21.58
1 -
14.33
1 10.69
1 -
Notes:
pm = micron
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
mg/L = milligrams per liter
mV = millivolts
NTU - nephelometric turbidity units
pCi/L = picocuries per liter
SU = standard unit
J = laboratory estimated concentration
J- = estimated concentration, biased low
J+ = estimated concentration, biased high
U = results not detected at concentrations which equal the laboratory's method reporting limit
02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216
(amended effective January 2015)
02L = North Carolina groundwater standards as specified in T15A NCAC 02L
D = dissolved
Deg C = degree Celsius
DHHS = North Carolina Department of Health and Human Services
DO = dissolved oxygen
GW = groundwater
GWQS = groundwater quality standard
IMAC = Interim Maximum Allow Concentration
N = normal
NS = no standard
T = total
TDS = total dissolved solids
TOC = total organic carbon
Page 10 of 12

Table 2-8 Groundwater Analytical Results Beneath and Adjacent to Ash Basin - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AB-17D
AB-18D
AB-18D
AB-20D
AB-20D
AB-21D
AB-21D
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
10/1/2015
7/19/2015
9/28/2015
7/17/2015
9/29/2015
7/15/2015
9/30/2015
N
N
N
N
N
N
N
MA-AB-17D-NS-3Q15
AB-18D
MA-AB-18D-NS-3Q15
AB-20D
MA-AB-20D-NS-3Q15
AB-21D
MA-AB-21D-NS-3Q15
Constituent
CAS RN
Fractio
n
Criteria
Min (range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
/L
100 U
100 U
100 U
140
180
100 U
100 U
Aluminum
7429-90-5
T
/L
100 U
380
450
290
250
82 J
100 J
Antimony
7440-36-0
D
/L
0.5 U
0.5 U
0.5 U
0.3 J
0.32 J
0.5 U
0.5 U
Antimony
7440-36-0
T
1
IMAC
/L
0.16 J
0.22 J
0.5 U
0.32 J
0.4 J
0.5 U
0.5 U
Arsenic
7440-38-2
D
/L
0.2 J
2.5
1.1
0.22 J
0.49 J
0.2 J
0.24 J
Arsenic
7440-38-2
T
10
02L
/L
0.5 U
2.8
1.5
0.15 J
0.45 J
0.45 J+
0.21 J
Barium
7440-39-3
D
/L
28
36
41
51
46
190
170
Barium
7440-39-3
T
700
02L
/L
28
46
46
58
46
200
170
Beryllium
7440-41-7
D
/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Beryllium
7440-41-7
T
4
IMAC
/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Boron
7440-42-8
D
/L
50 U
50 U
50 U
50 U
28 J
50 UJ
50 U
Boron
7440-42-8
T
700
02L
/L
50 U
50 U
50 U
50 U
50 U
50 U
50 U
Cadmium
7440-43-9
D
/L
0.08 U
0.053 J
0.08 U
0.051 J
0.08 U
0.08 UJ
0.08 U
Cadmium
7440-43-9
T
2
02L
/L
0.08 U
0.057 J
0.08 U
0.08 U
0.08 U
0.037 J+
0.08 U
Calcium
7440-70-2
T
-
u /L
11200
16400
16300
23300
21000
21400
18500
Chromium
7440-47-3
D
/L
1
0.38 J+
0.21 J
0.6
0.6
0.43 J+
0.23 J
Chromium
7440-47-3
T
10
02L
/L
1.3 J+
1.4
0.89 J+
2
1.9
1.2
0.62 J+
Cobalt
7440-48-4
D
/L
0.66
0.7
0.39 J
0.5 U
0.5 U
6.1
3.8
Cobalt
7440-48-4
T
1
IMAC
/L
0.45 J
1
0.52
0.5 U
0.5 U
6.4
3.5
Copper
7440-50-8
D
/L
0.24 J
1.4
1 U
6.9
1 U
0.68 J
1 U
Copper
7440-50-8
T
1000
02L
/L
0.35 J
1.6
0.31 J
5.9
1.1
0.82 J
0.57 J+
Iron
7439-89-6
D
/L
50 U
46 J
65
50 U
50 U
1000
2800
Iron
7439-89-6
T
300
02L
/L
50 U
430
460
260
140
1200
2800
Lead
7439-92-1
D
/L
0.1 U
0.1 UJ
0.1 U
0.62
0.1 U
0.12
0.1 U
Lead
7439-92-1
T
15
02L
/L
0.1 U
0.46
0.18
0.091 J+
0.072 J
0.11
0.056 J
Magnesium
7439-95-4
T
/L
3540
3540
3590
2380
1560
12000
12000
Manganese
7439-96-5
D
/L
20
270
320
5 U
5 U
400
330
Manganese
7439-96-5
T
50
02L
/L
20
300
310
4.2 J
5 U
460
300
Mercury
7439-97-6
D
/L
0.2 U
0.1 J
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Mercury
7439-97-6
T
1
02L
/L
0.2 U
0.2 U
0.2 UJ
0.2 U
0.2 U
0.2 UJ
0.2 U
Methane
74-82-8
N
-
N /L
1.6 J+
2.3 J
1.8 J
4.1 J
4.3 J+
1.8 J+
1.6 J+
Molybdenum
7439-98-7
D
/L
0.9
4.7
4.1
5.3
7.3
1.7
1.8
Molybdenum
7439-98-7
T
/L
0.93
4.8
3.9
5.3
6.9
1.6
1.6
Nickel
7440-02-0
D
/L
1.2
2.2
1.6
0.49 J
0.39 J
5
3.1
Nickel
7440-02-0
T
100
02L
/L
1.2
2.6
1.9
0.61
0.98
5.3
3
Potassium
7440-09-7
T
/L
3830 J
3360 J
3150 J
6740
6540
4000 J
5120
Selenium
7782-49-2
D
/L
0.5 U
0.38 J
0.5 U
0.5 U
0.5 U
0.35 J
0.22 J
Selenium
7782-49-2
T
20
02L
/L
0.5 U
0.43 J
0.5 U
0.5 U
0.5 U
0.37 J
0.31 J
Sodium
7440-23-5
T
/L
8600
10700
10600
15600
15400
11100
11000
Strontium
7440-24-6
D
/L
120
200
230
490
460
560
540
Strontium
7440-24-6
T
/L
120
220
240
530
460
590
520
Thallium
7440-28-0
D
/L
0.026 J
0.1 U
0.1 U
0.064 J
0.1 U
0.04 J
0.1 U
Thallium
7440-28-0
T
0.2
IMAC
/L
0.1 U
0.031 J
0.016 J
0.1 U
0.1 U
0.062 J+
0.1 U
Vanadium
7440-62-2
D
/L
3.8
3.1
2.4
0.55 J
1
0.29 J
0.28 J
Vanadium
7440-62-2
T
0.3
IMAC
/L
3.5
4.2
2.9
1.1
1.2
0.74 J
0.41 J
Zinc
7440-66-6
D
/L
10 U
10 U
10 U
2.6 J
10 U
10 UJ
14
Zinc
7440-66-6
T
1000
02L
/L
10 U
5 J
3.4 J
5.4 J
10 U
10 U
10 U
Total Dissolved Solids
TDS
N
500000
02L
/L
110000
132000
113000
119000
108000
186000
181000
Total Organic Carbon
TOC
N
/L
1000 U
1000 U
1000 U
1600
7100
630 J
1000 U
Total Suspended Solids
TSS
N
/L
2600 U
15200 J+
11600
5200
2500 U
3400
4000
Alkalinity, CO3
ALK-CO3
N
/L
5000 U
5000 U
5000 U
5100
2900 J
5000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
/L
58700
71200
69700
55100
63200
114000
107000
Alkalinity, lab
ALK-LAB
N
/L
58700
71200
69700
60200
66200
114000
107000
Chloride
16887-00-6
N
250000
02L
/L
1800
3300
2900
1900
2900
4800
5800
Nitrogen, NO2 plus NO3
NO2-NO3
N
/L
72
29
20
20 U
20 U
20 UJ
20 UJ
Sulfate
14808-79-8
N
250000
02L
/L
4000
6000
5200
16300
19000
8300
12400
Sulfide
18496-25-8
N
/L
100 U
100 U
100 U
100 U
100 UJ
100 U
100 U
Arsenic
7440-38-2
T
10
02L
/L
-
-
-
-
-
-
-
Chromium
7440-47-3
T
10
02L
/L
Iron
7439-89-6
T
300
02L
/L
Man anese
7439-96-5
D
/L
Man anese
7439-96-5
T
50
02L
/L
As III
7784-46-5
T
/L
As V
10103-60-3
T
/L
Chromium VI
18540-29-9
D
0.07
DHHS
/L
Fe II
1345-25-1
T
/L
Se IV
10102-18-8
T
/L
Page 11 of 12

Table 2-8 Groundwater Analytical Results Beneath and Adjacent to Ash Basin - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AB-17D
AB-18D
AB-18D
AB-20D
AB-20D
AB-21D
AB-21D
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
10/1/2015
7/19/2015
9/28/2015
7/17/2015
9/29/2015
7/15/2015
9/30/2015
N
N
N
N
N
N
N
MA-AB-17D-NS-3Q15
AB-18D
MA-AB-18D-NS-3Q15
AB-20D
MA-AB-20D-NS-3Q15
AB-21D
MA-AB-21D-NS-3Q15
Constituent
CAS RN
Fractio
n
Criteria
Min (range
onl
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Se VI
13410-01-0
T
/L
Dissolved Oxygen
DO
N
m /L
2.15
0.4
0.24
0.8
0.81
1.79
0.13
Temperature
TEMP
N
Deg C
18.1
20.3
19.9
25.7
22.5
17.7
19.4
H
PH
N
6.5
8.5
02L
SU
6.74
6.5
6.47
9.2
11.24
5.91
6.21
Turbidity, field
TURB
N
-
NTU
2.52
45.6
13.4
9.6
15
3.09
3.63
,Specific Conductivity field
Sc
NPS/cm
145.6
195.4
63.1
187.2
500
266
90.7
Oxidation Reduction Potential
ORP
N
mV
134.6
81.1
34.9
31.2
1 73.7
49.5
-88.1
GW Depth TOC
GW DEPTH-TOC
N
ft
15.21
7.8
1 68.09
18.05
Notes:
pm = micron
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
mg/L = milligrams per liter
mV = millivolts
NTU - nephelometric turbidity units
pCi/L = picocuries per liter
SU = standard unit
J = laboratory estimated concentration
J- = estimated concentration, biased low
J+ = estimated concentration, biased high
U = results not detected at concentrations which equal the laboratory's method reporting limit
02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216
(amended effective January 2015)
02L = North Carolina groundwater standards as specified in T15A NCAC 02L
D = dissolved
Deg C = degree Celsius
DHHS = North Carolina Department of Health and Human Services
DO = dissolved oxygen
GW = groundwater
GWQS = groundwater quality standard
IMAC = Interim Maximum Allow Concentration
N = normal
NS = no standard
T = total
TDS = total dissolved solids
TOC = total organic carbon
Page 12 of 12

Table 2-9 Groundwater Analytical Results Beneath the Dry Ash Landfill (Phase 11) - Round 1 and Round 2
Corrective Action Plan 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AL-213R
AL-2BR
AL-2D
AL-2D
AL-2D
AL-2S
AL-2S
AL-2S
AL-3D
Round 1
Round 2
Round 1
Round 2
Round 2
Round 1
Round 2
Round 2
Round 1
7/18/2015
10/7/2015
7/18/2015
10/1/2015
10/1/2015
7/15/2015
10/1/2015
10/1/2015
7/15/2015
N
N
N
N
N
N
N
N
N
AL-213R
MA-AL-2BR-NS-3Q15
AL-2D
MA-AL-2D-SPC-3Q15
MA-AL-2D-NS-3Q15
AL-2S
MA-AL-2S-SPC-3Q15
MA-AL-2S-NS-3Q15
AL-3D
Constituent
CAS RN
TFranctio
Criteria
Min (range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
u /L
100 U
100 U
100 U
100 U
62 J
74 J
100 U
Aluminum
7429-90-5
T
/L
100 U
590
160
130
54500
230
210
Antimony
7440-36-0
D
/L
0.27 J
0.87
0.5 U
0.5 U
0.31 J
0.16 J
0.5 U
Antimony
7440-36-0
T
1
IMAC
/L
0.31 J
1.3
0.5 U
0.5 U
0.4 J
0.49 J
0.16 J
Arsenic
7440-38-2
D
/L
0.46 J
0.44 J
0.42 J
0.2 J
0.45 J+
0.29 J
0.46 J+
Arsenic
7440-38-2
T
10
02L
/L
0.7
0.76
0.55
0.26 J
1.2 J+
0.56
0.71 J+
Barium
7440-39-3
D
/L
140
130
180
120
38
46
140
Barium
7440-39-3
T
700
02L
/L
180
170
180
110
960
47
150
Beryllium
7440-41-7
D
/L
0.2 U
0.2 U
0.2 U
0.2 U
0.94
0.88
0.2 U
Beryllium
7440-41-7
T
4
IMAC
/L
0.2 U
0.2 U
0.2 U
0.087 J
0.96
0.81
0.2 U
Boron
7440-42-8
D
/L
2000
2100
6000
7700
7400
7900
4300
Boron
7440-42-8
T
700
02L
/L
2100
2000
6500
6500
6500
7100
4000
Cadmium
7440-43-9
D
/L
0.029 J
0.08 U
0.08 U
0.08 U
0.4 J+
0.39
0.08 U
Cadmium
7440-43-9
T
2
02L
/L
0.08 U
0.08 U
0.08 U
0.08 U
0.34
0.38
0.1
Calcium
7440-70-2
T
/L
55900
77300
114000
125000
240000
242000
112000
Chromium
7440-47-3
D
/L
16
2.5
0.34 J+
0.39 J
0.97 J+
1
0.29 J+
Chromium
7440-47-3
T
10
02L
/L
17.5
6.1
2.5
1
15.5
1.6
1.9
Cobalt
7440-48-4
D
/L
0.5 U
0.5 U
15.9
19.6
2.9
0.3 J
1.3
Cobalt
7440-48-4
T
1
IMAC
/L
0.15 J
0.56
15.8
20
4.4
0.38 J
1.3
Copper
7440-50-8
D
/L
1.5 J+
0.75 J
0.23 J+
0.49 J
0.67 J
11.5
1 U
Copper
7440-50-8
T
1000
02L
/L
1.1 J+
3.8
1.2 J+
0.29 J
2.7
14.7
0.36 J
Iron
7439-89-6
D
/L
50 U
50 U
2100
620
440
52
1400
Iron
7439-89-6
T
300
02L
/L
86
1100
3000
750
54000
280
1900
Lead
7439-92-1
D
/L
0.1 UJ
0.1 U
0.1 UJ
0.1 U
0.092 J
0.096 J
0.067 J
Lead
7439-92-1
T
15
02L
/L
0.051 J
0.57
0.1 U
0.053 J
2.4
0.32
0.27
Magnesium
7439-95-4
T
/L
13200
13200
32800
37000
71600
73500
31900
Manganese
7439-96-5
D
/L
5 U
6.8
8000
6600
380
50
600
Manganese
7439-96-5
T
50
02L
/L
5.6
44
8400
6100
1200
52
590
Mercury
7439-97-6
D
/L
0.31 J+
0.2 U
0.2 UJ
0.2 U
0.2 U
0.2 U
0.2 U
Mercury
7439-97-6
T
1
02L
/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 UJ
0.2 U
0.2 UJ
Methane
74-82-8
N
/L
2.6 J
2.7 J+
10.1
3.6 J+
3.3 J
1.7 J+
1.3 J
Molybdenum
7439-98-7
D
/L
38.3
28.8
5.5
2.8
0.54
0.1 J
1.8
Molybdenum
7439-98-7
T
/L
34.8
30.2
5.4
3.1
0.81
0.13 J
2
Nickel
7440-02-0
D
/L
0.94
0.76
18
33.1
5.3
0.99
4.6
Nickel
7440-02-0
T
100
02L
/L
5.5
2.4
17.1
34.1
10.7
1.2
4.6
Potassium
7440-09-7
T
/L
24600
20500
8000
8810
8610
8670
8210
Selenium
7782-49-2
D
/L
23.4
12.8
13
31.5
113
98.5
22.5
Selenium
7782-49-2
T
20
02L
/L
24
16.4
13.6
33.1
108
99.7
16.7
Sodium
7440-23-5
T
/L
23000
26000
36800
40800
62000
66800
27500
Strontium
7440-24-6
D
/L
1700
1900
5100
6100
3200
4000
1900
Strontium
7440-24-6
T
/L
2100
2300
5800
5800
3300
4000
2100
Thallium
7440-28-0
D
/L
0.075 J
0.03 J
0.018 J
0.1 U
0.025 J
0.1 U
0.1 U
Thallium
7440-28-0
T
0.2
IMAC
/L
0.047 J
0.038 J
0.1 U
0.1 U
0.067 J+
0.1 U
0.022 J+
Vanadium
7440-62-2
D
/L
4
4.3
1 U
1 U
0.58 J
0.57 J
0.31 J
Vanadium
7440-62-2
T
0.3
IMAC
/L
4.5
6.8
0.78 J
0.4 J
6.5
1.8
0.65 J
Zinc
7440-66-6
D
/L
10 U
10 U
7.1 J
18
20 J+
70
2.6 J+
Zinc
7440-66-6
T
1000
02L
/L
10 U
18
11
41
170
86
9.4 J
Total Dissolved Solids
TDS
N
500000
02L
I pg/L
376000
368000
761000
841000
1610000
1570000
692000
Total Organic Carbon
TOC
N
/L
7600
1700
770 J
1000 U
810 J
1000 U
610 J
Total Suspended Solids
TSS
N
/L
172000
28800
19000
6300
198000
17600
10000
Alkalinity, CO3
ALK-CO3
N
/L
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
/L
64400
66600
106000
89600
23100
19400
82900
Alkalinity, lab
ALK-LAB
N
/L
64400
66600
106000
89600
23100
19400
82900
Chloride
16887-00-6
N
250000
02L
/L
2500 J-
2700
3500
3200 J+
1400
2100 J+
2300
Nitrogen, NO2 plus NO3
NO2-NO3
N
/L
210 J-
91
120 J-
840
1400 J-
1700
18 J-
Sulfate
14808-79-8
N
250000
02L
/L
176000
212000
386000
472000 J+
979000
1050000 J+
402000
Sulfide
18496-25-8
N
/L
100 U
100 U
100 U
-
100 UJ
100 U
-
100 UJ
100 U
Arsenic
7440-38-2
T
10
02L
/L
-
0.665 J+
0.5 UJ
-
-
0.5 UJ
-
-
Chromium
7440-47-3
T
10
02L
/L
5.24 J
2.05
1.6
Iron
7439-89-6
T
300
02L
/L
1850 J
919
242
Manganese
7439-96-5
D
/L
9.22
6910
42.9
Manganese
7439-96-5
T
50
02L
/L
47.6 J
6930
43.8
As III
7784-46-5
T
/L
0.5 UJ
0.5 UJ
0.5 UJ
As V
10103-60-3
T
/L
0.665 J+
0.5 U
0.5 U
Chromium VI
18540-29-9
T
0.07
DHHS
/L
1.6
0.02 UJ
0.9 J
Fe II
1345-25-1
T
/L
16.1 J+
748
93.6
Se IV
10102-18-8
T
/L
2 U
2 UJ
2 UJ
Se VI
13410-01-0
T
/L
18.9 J+
42.1 J+
123 J+
Page 1 of 4

Table 2-9 Groundwater Analytical Results Beneath the Dry Ash Landfill (Phase 11) - Round 1 and Round 2
Corrective Action Plan 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AL-2BR
AL-2BR
AL-2D
AL-2D
AL-2D
AL-2S
AL-2S
AL-2S
AL-3D
Round 1
Round 2
Round 1
Round 2
Round 2
Round 1
Round 2
Round 2
Round 1
7/18/2015
10/7/2015
7/18/2015
10/1/2015
10/1/2015
7/15/2015
10/1/2015
10/1/2015
7/15/2015
N
N
N
N
N
N
N
N
N
AL-2BR
MA-AL-2BR-NS-3Q15
AL-2D
MA-AL-2D-SPC-3Q15
MA-AL-2D-NS-3Q15
AL-2S
MA-AL-2S-SPC-3Q15
MA-AL-2S-NS-3Q15
AL-3D
Constituent
CAS RN
Fractio
n
Criteria
Min (range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Dissolved Oxygen
DO
N
m /L
3.72
2.4
1.46
0.66
2.8
3.44
1.14
Temperature
TEMP
N
-
-
Deg C
30.9
22.9
23.8
20.7
29.4
21.2
26
H
PH
N
6.5
8.5
02L
SU
8.78
9.5
6.52
6.21
5.4
5.38
6.29
Turbidity, field
TURB
N
NTU
9.87
43.01
6.03
7.93
30.8
13.3
7.3
Specific Conductivity field
SC
NPS/Cm
737
645
1101
1084
1677
2770
1049
Oxidation Reduction Potential
ORP
N
my
140
-9.6
-10.2
-16.9
189.5
171.2
16.2
GW Depth TOC
W DEPTH -TO
N
ft
-
116.73
114.8
115.7
Notes:
pm = micron
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
mg/L = milligrams per liter
my = millivolts
NTU - nephelometric turbidity units
pCi/L = picocuries per liter
SU = standard unit
J = laboratory estimated concentration
J- = estimated concentration, biased low
J+ = estimated concentration, biased high
U = results not detected at concentrations which equal the laboratory's method reporting limit
02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216
(amended effective January 2015)
02L = North Carolina groundwater standards as specified in T15A NCAC 02L
D = dissolved
Deg C = degree Celsius
DHHS = North Carolina Department of Health and Human Services
DO = dissolved oxygen
GW = groundwater
GWQS = groundwater quality standard
IMAC = Interim Maximum Allow Concentration
N = normal
NS = no standard
T = total
TDS = total dissolved solids
TOC = total organic carbon
Page 2 of 4

Table 2-9 Groundwater Analytical Results Beneath the Dry Ash Landfill (Phase 11) - Round 1 and Round 2
Corrective Action Plan 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AL-31)
AL-413
AL-41)
Round 2
Round 1
Round 2
9/28/2015
7/20/2015
9/28/2015
N
N
N
MA-AL-3D-NS-3Q15
AL-4D
MA-AL-4D-NS-3Q15
Constituent
CAS RN
Fractio
n
Criteria
Min (range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
/L
100 U
100 U
100 U
Aluminum
7429-90-5
T
/L
57 J
310
54 J
Antimony
7440-36-0
D
/L
0.5 U
0.5 U
0.5 U
Antimony
7440-36-0
T
1
IMAC
/L
0.19 J
0.5 U
0.15 J
Arsenic
7440-38-2
D
/L
0.41 J
0.27 J
0.5 U
Arsenic
7440-38-2
T
10
02L
/L
0.53
0.43 J
0.15 J
Barium
7440-39-3
D
/L
140
230
93
Barium
7440-39-3
T
700
02L
/L
130
280
89
Beryllium
7440-41-7
D
/L
0.2 U
0.2 U
0.2 U
Beryllium
7440-41-7
T
4
IMAC
/L
0.2 U
0.19 J
0.2 U
Boron
7440-42-8
D
/L
4200
15100
20200
Boron
7440-42-8
T
700
02L
/L
3800
15200
20600
Cadmium
7440-43-9
D
/L
0.08 U
0.08 U
0.057 J
Cadmium
7440-43-9
T
2
02L
/L
0.08 U
0.028 J
0.053 J
Calcium
7440-70-2
T
/L
105000
73800
116000
Chromium
7440-47-3
D
/L
0.7
0.51
1.7
Chromium
7440-47-3
T
10
02L
/L
6.3 J+
2.3
36.7
Cobalt
7440-48-4
D
/L
1
6.2
2.2
Cobalt
7440-48-4
T
1
IMAC
/L
1.1
7.4
2.3
Copper
7440-50-8
D
/L
0.36 J
0.96 J+
0.27 J
Copper
7440-50-8
T
1000
02L
/L
0.43 J
0.66 J
1.1
Iron
7439-89-6
D
/L
1600
1700
120
Iron
7439-89-6
T
300
02L
/L
1700
3100
320
Lead
7439-92-1
D
/L
0.1 U
0.14
0.1 U
Lead
7439-92-1
T
15
02L
/L
0.097 J
0.27 J+
0.1 U
Magnesium
7439-95-4
T
/L
34800
30600
45700
Manganese
7439-96-5
D
/L
350
370
130
Manganese
7439-96-5
T
50
02L
/L
320
530
130
Mercury
7439-97-6
D
/L
0.2 U
0.2 U
0.2 U
Mercury
7439-97-6
T
1
02L
/L
0.2 U
0.2 U
0.2 U
Methane
74-82-8
N
/L
2 J+
1.7 J
1.4 J+
Molybdenum
7439-98-7
D
/L
3.1
1.7
1.3
Molybdenum
7439-98-7
T
/L
3
2.6
1.4
Nickel
7440-02-0
D
/L
3
6.5
17.5
Nickel
7440-02-0
T
100
02L
/L
5.1
6.9
25
Potassium
7440-09-7
T
/L
10600
7520
8620
Selenium
7782-49-2
D
/L
7.3
10.3
13.5
Selenium
7782-49-2
T
20
02L
/L
9.5
9
14
Sodium
7440-23-5
T
/L
29200
26000
30400
Strontium
7440-24-6
D
/L
2200
4100
5500
Strontium
7440-24-6
T
/L
2100
4500
5400
Thallium
7440-28-0
D
/L
0.023 J
0.1 U
0.025 J
Thallium
7440-28-0
T
0.2
IMAC
/L
0.029 J+
0.1 U
0.028 J+
Vanadium
7440-62-2
D
/L
1 U
1.7
1.2
Vanadium
7440-62-2
T
0.3
IMAC
/L
0.43 J
2.4
1.8
Zinc
7440-66-6
D
/L
14
11
17
Zinc
7440-66-6
T
1000
02L
/L
16
7 J
17
Total Dissolved Solids
TDS
N
500000
02L
/L
683000
582000
892000
Total Organic Carbon
TOC
N
/L
1000 U
790 J
1000 U
Total Suspended Solids
TSS
N
/L
4200
95700
3600
Alkalinity, CO3
ALK-CO3
N
/L
5000 U
5000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
/L
75700
33800
27700
Alkalinity, lab
ALK-LAB
N
/L
75700
33800
27700
Chloride
16887-00-6
N
250000
02L
/L
2900
1900
2200
Nitrogen, NO2 plus NO3
NO2-NO3
N
/L
22
360
930
Sulfate
14808-79-8
N
250000
02L
/L
397000
308000
512000
Sulfide
18496-25-8
N
/L
100 U
100 U
100 U
Arsenic
7440-38-2
T
10
02L
/L
-
-
-
Chromium
7440-47-3
T
10
02L
/L
Iron
7439-89-6
T
300
02L
/L
Manganese
7439-96-5
D
/L
Manganese
7439-96-5
T
50
02L
/L
As III
7784-46-5
T
/L
As V
10103-60-3
T
/L
Chromium VI
18540-29-9
T
0.07
DHHS
/L
Fe II
1345-25-1
T
/L
Se IV
10102-18-8
T
/L
Se VI
13410-01-0
T
/L
Page 3 of 4

Table 2-9 Groundwater Analytical Results Beneath the Dry Ash Landfill (Phase 11) — Round 1 and Round 2
Corrective Action Plan 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AL-31)
AL-413
AL-4D
Round 2
Round 1
Round 2
9/28/2015
7/20/2015
9/28/2015
N
N
N
MA-AL-3D-NS-3Q15
AL-4D
MA-AL-4D-NS-3Q15
Constituent
CAS RN
Fractio
n
Criteria
Min (range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Dissolved Oxygen
DO
N
m /L
0.32
1.98
2.86
Temperature
TEMP
N
-
-
Deg C
20.6
24.3
19.7
H
PH
N
6.5
8.5
02L
SU
6.62
6.06
5.91
Turbidity, field
TURB
N
NTU
4.81
21.32
6.19
Specific Conductivity field
Sc
N
S/cm
785
648
913
Oxidation Reduction Potential
ORP
N
my
179.8
51.9
103.6
GW Depth TOC)
;W_DEPTH-TOj
N
I
I
ft
124.55
1 -
107.05
Notes:
pm = micron
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
mg/L = milligrams per liter
my = millivolts
NTU - nephelometric turbidity units
pCi/L = picocuries per liter
SU = standard unit
J = laboratory estimated concentration
J- = estimated concentration, biased low
J+ = estimated concentration, biased high
U = results not detected at concentrations which equal the laboratory's method reporting limit
02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216
(amended effective January 2015)
02L = North Carolina groundwater standards as specified in T15A NCAC 02L
D = dissolved
Deg C = degree Celsius
DHHS = North Carolina Department of Health and Human Services
DO = dissolved oxygen
GW = groundwater
GWQS = groundwater quality standard
IMAC = Interim Maximum Allow Concentration
N = normal
NS = no standard
T = total
TDS = total dissolved solids
TOC = total organic carbon
Page 4 of 4

Table 2-10 Groundwater Analytical Results Downgradient and East of Ash Basin and Dry Ash Landfill (Phase 1) -Round land Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AL-1D
AL-1D
AL-1D
ALAS
ALAS
ALAS
MW-14BR
MW-14BR
MW-14D
Round 1
Round 2
Round 2
Round 1
Round 2
Round 2
Round 1
Round 2
Round 1
7/16/2015
9/28/2015
9/29/2015
7/16/2015
9/28/2015
9/29/2015
7/19/2015
9/30/2015
7/20/2015
N
N
N
N
N
N
N
N
N
AL-1D
MA-AL-ID-NS-3Q15
MA-AL-1D-SPC-3Q15
ALAS
MA-AL-1S-NS-3Q15
MA-AL-1S-SPC-3Q15
MW-14BR
MA-MW-14BR-NS-3Q1
MW-14D
Constituent
CAS RN
Fractio
n
Criteria
Min (range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
/L
50
100 U
1200
1200
100 U
100 U
100 U
Aluminum
7429-90-5
T
/L
951
120
2600
2000
290
160
230
Antimony
7440-36-0
D
/L
0.24 J
0.5 U
0.26 J
0.5 U
0.5 U
0.5 U
0.53
Antimony
7440-36-0
T
1
IMAC
/L
0.8
0.5 U
0.3 J
0.5 U
0.22 J
0.5 U
0.5 U
Arsenic
7440-38-2
D
/L
0.32 J
0.19 J
7.2
0.39 J
0.21 J
0.16 J
0.5 U
Arsenic
7440-38-2
T
10
02L
/L
0.56
0.14 J
2.7
0.46 J
0.27 J
0.25 J
0.5 U
Barium
7440-39-3
D
/L
650
790
220
290
16
24
32
Barium
7440-39-3
T
700
02L
/L
660
800
280
300
23
25
38
Beryllium
7440-41-7
D
/L
0.067
0.2 U
8.4
9.7
0.2 U
0.2 U
0.37
Beryllium
7440-41-7
T
4
IMAC
/L
0.067
0.2 U
9.9
7.7
0.2 U
0.2 U
0.42
Boron
7440-42-8
D
/L
1400
1500
4200
4900
42 J
36 J
2300
Boron
7440-42-8
T
700
02L
/L
1300
1500
4600
4700
29 J
30 J
2600
Cadmium
7440-43-9
D
/L
0.024
0.032 J
0.62
0.83
0.08 U
0.08 U
0.065 J
Cadmium
7440-43-9
T
2
02L
/L
0.035 J
0.028 J
0.7
0.68
0.08 U
0.08 U
0.042 J
Calcium
7440-70-2
T
-
N /L
76700
92000
63700 J-
65600
13400
14700
57800
Chromium
7440-47-3
D
/L
2.8 J+
0.72
13.8
0.47 J
1.9 J+
0.63
0.41 J
Chromium
7440-47-3
T
10
02L
/L
5
1.4
30.9
1.1
4.3
3.8
1.2
Cobalt
7440-48-4
D
/L
1
0.71
10.2
11.3
0.5 U
0.5 U
2.2
Cobalt
7440-48-4
T
1
IMAC
/L
1.3
0.63
11.8
10.2
0.24 J
0.19 J
2.4
Copper
7440-50-8
D
/L
0.58 J
1 U
1.5
0.7 J
1.7
0.64 J
2.2 J+
Copper
7440-50-8
T
1000
02L
/L
0.51 J
0.66 J
2.3
1.7
1.9
1.3 J+
2.2
Iron
7439-89-6
D
/L
25
31 J
71
50 U
50 U
50 U
47 J
Iron
7439-89-6
T
300
02L
/L
110
150
1300
510
320
260
340
Lead
7439-92-1
D
/L
0.058 J
0.1 U
0.23 J
0.099 J
0.079 J
0.061 J
0.056 J
Lead
7439-92-1
T
15
02L
/L
0.1
0.11
1.9
0.39
0.2 J+
0.15
0.18 J+
Magnesium
7439-95-4
T
/L
21400
21900
43500
47700
4750
6330
17000
Manganese
7439-96-5
D
/L
19
23
3500
3500
9.4
11
39
Manganese
7439-96-5
T
50
02L
/L
25
29
3600
3700
15
16
45
Mercury
7439-97-6
D
/L
0.09
0.2 U
0.09
0.2 U
0.12 J
0.2 U
0.2 U
Mercury
7439-97-6
T
1
02L
/L
0.07
0.2 U
0.094 J
0.14 J
0.2 U
0.2 U
0.2 U
Methane
74-82-8
N
/L
2 J
1.2 J+
20.9
19.2
1.2 J+
1.4 J+
2 J
Molybdenum
7439-98-7
D
/L
12.7
0.14 J
0.32 J
0.5 U
2.4
0.72
0.48 J
Molybdenum
7439-98-7
T
/L
6.6
0.2 J
2
0.5 U
2.8
0.74
0.44 J
Nickel
7440-02-0
D
/L
2.2
1.9
9.7
0.67
1.5
1.2
21
Nickel
7440-02-0
T
100
02L
/L
2.7
1.6
13.6
0.85
1.8
3.3
22.1
Potassium
7440-09-7
T
/L
32700
10100
24500
23200
5190
3890 J
5010
Selenium
7782-49-2
D
/L
0.3 J
0.5 U
10.5
0.27 J
1.2
1.5
3.6
Selenium
7782-49-2
T
20
02L
/L
0.49 J
0.5 U
1
0.88
1.3
1.4
3.2
Sodium
7440-23-5
T
/L
30300
30800
11900
12400
13500
13200
27200
Strontium
7440-24-6
D
/L
4400
5000
2900
3400
370
520
2000
Strontium
7440-24-6
T
/L
4500
5100
3200
3500
400
510
2200
Thallium
7440-28-0
D
/L
0.023 J+
0.1 U
0.16 J+
0.25
0.1 U
0.1 U
0.042 J
Thallium
7440-28-0
T
0.2
IMAC
/L
0.015
0.1 U
0.33
0.2
0.1 U
0.1 U
0.1 U
Vanadium
7440-62-2
D
/L
0.54 J
0.82 J
0.28
1 U
3.8
3.9
1 U
Vanadium
7440-62-2
T
0.3
IMAC
/L
1.9
0.82 J
8.5
1.3
4.3
4
1.3
Zinc
7440-66-6
D
/L
8.8 J
9.4 J
25
33
43
9.5 J
6.5 J
Zinc
7440-66-6
T
1000
02L
/L
6.3 J+
15 J+
30 J+
43
63
16
6.3 J
Total Dissolved Solids
TDS
N
500000
02L
/L
744000
906000
831000
1660000
141000
137000
427000
Total Organic Carbon
TOC
N
-
N /L
500
1000 U
500
1000 U
580 J
1000 UJ
1000 U
Total Suspended Solids
TSS
N
/L
18000
9100
238000
4500
20400
4800
3900
Alkalinity, CO3
ALK-CO3
N
/L
1000
5000 U
1000
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
/L
67600
28000
1000
5000 U
56500
59800
24400
Alkalinity, lab
ALK-LAB
N
/L
67600
28000
1000
5000 U
56500 J-
59800
24400
Chloride
16887-00-6
N
250000
02L
/L
222000
250000
260000
282000
10800
17200 J-
33700
Nitrogen, NO2 plus NO3
NO2-NO3
N
/L
27 J-
21
66 J-
191
130
210
97
Sulfate
14808-79-8
N
250000
02L
/L
17100
10800
62200
22900
12900
9300
207000
Sulfide
18496-25-8
N
/L
100
100 U
-
100
100 U
-
100 U
100 U
100 U
Arsenic
7440-38-2
T
10
02L
/L
-
-
0.5 UJ
-
-
0.5 UJ
-
-
0.397 J+
Chromium
7440-47-3
T
10
02L
/L
3.68
5.29
0.952
Iron
7439-89-6
T
300
02L
/L
235
1820
132
Manganese
7439-96-5
D
/L
24.6
4040
36
Manganese
7439-96-5
T
50
02L
/L
45.5
4610
41
As III
7784-46-5
T
/L
0.209 J
0.209 J
0.5 UJ
As V
10103-60-3
T
/L
0.5 U
0.5 U
0.397 J+
Chromium VI
18540-29-9
D
0.07
DHHS
/L
-
-
0.11
Chromium VI
18540-29-9
T
0.07
DHHS
/L
0.16
0.14
-
Fe II
1345-25-1
T
/L
119 J-
148 J-
30 U
Se IV
10102-18-8
T
/L
2 U
2 U
2 U
Se VI
13410- 11-0
T
/L
2 U
2 U
4.12
Page 1 of 4

Table 2-10 Groundwater Analytical Results Downgradient and East of Ash Basin and Dry Ash Landfill (Phase 1) -Round land Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AL-1D
AL-1D
AL-1D
ALAS
ALAS
ALAS
MW-14BR
MW-14BR
MW-14D
Round 1
Round 2
Round 2
Round 1
Round 2
Round 2
Round 1
Round 2
Round 1
7/16/2015
9/28/2015
9/29/2015
7/16/2015
9/28/2015
9/29/2015
7/19/2015
9/30/2015
7/20/2015
N
N
N
N
N
N
N
N
N
AL-1D
MA-AL-1D-NS-3Q15
MA-AL-1D-SPC-3Q15
ALAS
MA-AL-1S-NS-3Q15
MA-AL-1S-SPC-3Q15
MW-14BR
MA-MW-14BR-NS-3Q1
MW-14D
Constituent
CAS RN
Fractio
n
Criteria
Min (range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Uranium, Natural
7440-61-1
T
p /L
0.0838 J
Radium-226
13982-63-3
T
Ci/L
96.1 J
Radium-228
15262-20-1
T
Ci/L
3 U
Uranium-233
13968-55-3
T
/L
0.05 U
Uranium-234
13966-29-5
T
/L
0.05 U
Uranium-236
13982-70-2
T
/L
0.05 U
Dissolved Oxygen
DO
N
m /L
1 1.12
0.28
0.91
1.29
0.24
1.01
2.9
1.18
0.5
Temperature
TEMP
N
-
Deg C
25.9
19.8
20.8
26
21.3
23.3
21
18.7
19.9
H
PH
N
6.5
8.5
02L
SU
6.24
6.06
5.94
4.48
4.59
4.49
6.6
6.24
5.5
Turbidity, field
TURB
N
-
-
NTU
6.6
6.42
6.1
5.62
6.53
15.5
6.9
9.65
9.06
Specific Conductivity field
SC
NPS/Cm
1505
1480
1490
1749
1640
1660
219.6
71.9
570
Oxidation Reduction Potential
ORP
N
my
151.7
77
87.4
597
590.4
589.6
143.8
68
-5.5
GW Depth TOC
W DEPTH -TO
N
I
ft
45.35
1 44.92
1 -
39.8
39.71
-
-
Notes:
pm = micron
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
mg/L = milligrams per liter
my = millivolts
NTU - nephelometric turbidity units
pCi/L = picocuries per liter
SU = standard unit
J = laboratory estimated concentration
J- = estimated concentration, biased low
J+ = estimated concentration, biased high
U = results not detected at concentrations which equal the laboratory's method reporting limit
02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216
(amended effective January 2015)
02L = North Carolina groundwater standards as specified in T15A NCAC 02L
D = dissolved
Deg C = degree Celsius
DHHS = North Carolina Department of Health and Human Services
DO = dissolved oxygen
GW = groundwater
GWQS = groundwater quality standard
IMAC = Interim Maximum Allow Concentration
N = normal
NS = no standard
T = total
TDS = total dissolved solids
TOC = total organic carbon
Page 2 of 4

Table 2-10 Groundwater Analytical Results Downgradient and East of Ash Basin and Dry Ash Landfill (Phase 1) -Round land Round 2
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
MW-14D
MW-14S
MW-14S
Round 2
Round 1
Round 2
9/30/2015
7/20/2015
9/30/2015
N
N
N
MA-MW-14D-NS-3Q15
MW-14S
MA-MW-I4S-NS-3Q15
Constituent
CAS RN
Fractio
n
Criteria
Min (range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
N /L
100 U
130
150
Aluminum
7429-90-5
T
/L
100 U
240
480
Antimony
7440-36-0
D
/L
0.5 U
0.26 J
0.5 U
Antimony
7440-36-0
T
1
IMAC
/L
0.5 U
0.23 J
0.5 U
Arsenic
7440-38-2
D
/L
0.13 J
0.5 U
0.5 U
Arsenic
7440-38-2
T
10
02L
/L
0.5 U
0.5 U
0.5 U
Barium
7440-39-3
D
/L
33
23
25
Barium
7440-39-3
T
700
02L
/L
31
27
30
Beryllium
7440-41-7
D
/L
0.32
0.56
0.48
Beryllium
7440-41-7
T
4
IMAC
/L
0.26
0.57
0.44
Boron
7440-42-8
D
/L
2300
2500
2500
Boron
7440-42-8
T
700
02L
/L
2100
2700
2400
Cadmium
7440-43-9
D
/L
0.039 J
0.13
0.13
Cadmium
7440-43-9
T
2
02L
/L
0.08 U
0.12
0.088
Calcium
7440-70-2
T
-
N /L
52900
73200
72500
Chromium
7440-47-3
D
/L
0.47 J
0.64
0.94
Chromium
7440-47-3
T
10
02L
/L
0.3 J+
0.96
1.7 J+
Cobalt
7440-48-4
D
/L
1.9
8.5
6.4
Cobalt
7440-48-4
T
1
IMAC
/L
1.6
8.2
5.4
Copper
7440-50-8
D
/L
0.78 J
9
8.2
Copper
7440-50-8
T
1000
02L
/L
0.88 J+
8.9
7.7
Iron
7439-89-6
D
-
/L
160
50 U
50 U
Iron
7439-89-6
T
300
02L
/L
190
120
420
Lead
7439-92-1
D
/L
0.11
0.06 J
0.1 U
Lead
7439-92-1
T
15
02L
/L
0.1 U
0.067 J+
0.14
Magnesium
7439-95-4
T
/L
15700
30500
30200
Manganese
7439-96-5
D
/L
44
50
44
Manganese
7439-96-5
T
50
02L
/L
44
54
47
Mercury
7439-97-6
D
/L
0.2 U
0.2 U
0.2 U
Mercury
7439-97-6
T
1
02L
/L
0.2 U
0.2 U
0.2 U
Methane
74-82-8
N
/L
1.8 J+
1.3 J
1.5 J+
Molybdenum
7439-98-7
D
/L
0.71
0.41 J
0.28 J
Molybdenum
7439-98-7
T
/L
0.68
0.45 J
0.41 J
Nickel
7440-02-0
D
/L
20.1
43.5
45.7
Nickel
7440-02-0
T
100
02L
/L
16.5
44.8
38.6
Potassium
7440-09-7
T
/L
4940 J
5320
5460
Selenium
7782-49-2
D
/L
3.1
5.5
5.1
Selenium
7782-49-2
T
20
02L
/L
2.8
5
4.2
Sodium
7440-23-5
T
/L
27900
24200
25200
Strontium
7440-24-6
D
/L
2000
1800
1900
Strontium
7440-24-6
T
/L
1900
1900
1900
Thallium
7440-28-0
D
/L
0.1 U
0.066 J
0.056 J
Thallium
7440-28-0
T
0.2
IMAC
/L
0.1 U
0.07 J
0.048 J
Vanadium
7440-62-2
D
/L
0.38 J
1 U
1 U
Vanadium
7440-62-2
T
0.3
IMAC
/L
1 U
0.35 J
2
Zinc
7440-66-6
D
/L
16
101
28
Zinc
7440-66-6
T
1000
02L
/L
22
12
38
Total Dissolved Solids
TDS
N
500000
02L
/L
391000
552000
522000
Total Organic Carbon
TOC
N
/L
1000 UJ
510 J
1000 UJ
Total Suspended Solids
TSS
N
/L
5000 U
2500 U
7000
Alkalinity, CO3
ALK-CO3
N
/L
5000 U
5000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
/L
27000
15200
15900
Alkalinity, lab
ALK-LAB
N
/L
27000
15200
15900
Chloride
16887-00-6
N
250000
02L
/L
29800 J-
82700
89600 J-
Nitro en, NO2 plus NO3
NO2-NO3
N
/L
110 J+
130
140 J+
Sulfate
14808-79-8
N
250000
02L
/L
185000
223000
208000
Sulfide
18496-25-8
N
/L
100 U
100 U
100 U
Arsenic
7440-38-2
T
10
02L
/L
-
0.5 UJ
-
Chromium
7440-47-3
T
10
02L
/L
1.52 J+
Iron
7439-89-6
T
300
02L
/L
116
Manganese
7439-96-5
D
/L
44.3
Manganese
7439-96-5
T
50
02L
/L
57.9
As III
7784-46-5
T
/L
0.5 UJ
As V
10103-60-3
T
/L
0.5 UJ
Chromium VI
18540-29-9
D
0.07
DHHS
/L
0.32
Chromium VI
18540-29-9
T
0.07
DHHS
/L
-
Fe
IV
/L
30 UI
Se
10102-18-8
T
/L
2 U
Se VI
13410-01-0
T
/L
6.44
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Page 3 of 4

Table 2-10 Groundwater Analytical Results Downgradient and East of Ash Basin and Dry Ash Landfill (Phase 1) -Round land Round 2
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
MW-14D
MW-14S
MW-14S
Round 2
Round 1
Round 2
9/30/2015
7/20/2015
9/30/2015
N
N
N
MA-MW-14D-NS-3Q15
MW-14S
MA-MW-I4S-NS-3Q15
Constituent
CAS RN
Fractio
n
Criteria
Min (range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Uranium, Natural
7440-61-1
T
/L
0.107 J
Radium-226
13982-63-3
T
Ci/L
5.96
Radium-228
15262-20-1
T
Ci/L
3 U
Uranium-233
13968-55-3
T
/L
0.05 U
Uranium-234
13966-29-5
T
/L
0.05 U
Uranium-236
13982-70-2
T
/L
0.05 U
-
Dissolved Oxygen
DO
N
m /L
0.37
1.5
1.37
Temperature
TEMP
N
-
Deg C
17.3
21.3
17.9
H
PH
N
6.5
8.5
02L
SU
5.56
5.3
5.33
Turbidity, field
TURB
N
-
NTU
4.58
4.5
4.3
Specific Conductivity field
SC
NPS/Cm
560.6
744
786
Oxidation Reduction Potential
ORP
N
my
102.3
39.4
212.5
GW Depth TOC)
PW_DEPTH-TOj
N
I
ft
40.51
1 -
39.4
Notes:
pm = micron
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
mg/L = milligrams per liter
my = millivolts
NTU - nephelometric turbidity units
pCi/L = picocuries per liter
SU = standard unit
J = laboratory estimated concentration
J- = estimated concentration, biased low
J+ = estimated concentration, biased high
U = results not detected at concentrations which equal the laboratory's method reporting limit
02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216
(amended effective January 2015)
02L = North Carolina groundwater standards as specified in T15A NCAC 02L
D = dissolved
Deg C = degree Celsius
DHHS = North Carolina Department of Health and Human Services
DO = dissolved oxygen
GW = groundwater
GWQS = groundwater quality standard
IMAC = Interim Maximum Allow Concentration
N = normal
NS = no standard
T = total
TDS = total dissolved solids
TOC = total organic carbon
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Page 4 of 4

Table 2-11 Groundwater Analytical Results Downgradient and Southeast of Ash Basin - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AB-1BR
AB-1 BR
AB-1D
AB-1D
ABAS
ABAS
AB-2D
AB-2D
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
7/17/2015
9/28/2015
7/17/2015
9/28/2015
7/17/2015
9/28/2015
7/21/2015
9/29/2015
N
N
N
N
N
N
N
N
AB-1BR
MA-AB-1BR-NS-3Q15
AB-1D
MA-A13-1D-NS-3Q15
ABAS
MA-AB-1S-NS-3Q15
AB-2D
MA-AB-2D-NS-3Q15
Constituent
CAS RN
Fraction
Criteria
Min (range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
/L
100 U
100 U
100 U
100 U
1200
740
100 U
100 U
Aluminum
7429-90-5
T
/L
220
130
380
60 J
1300
900
1100
71 J
Antimony
7440-36-0
D
/L
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
Antimony
7440-36-0
T
1
IMAC
/L
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
Arsenic
7440-38-2
D
/L
0.17 J
0.18 J
0.5 U
0.15 J
4.5
3.6
0.5 U
0.14 J
Arsenic
7440-38-2
T
10
02L
/L
0.33 J
0.37 J
0.5 U
0.19 J
5.7
4.2
0.26 J
0.19 J+
Barium
7440-39-3
D
/L
18
28
420
380
97
100
82
52
Barium
7440-39-3
T
700
02L
/L
21
29
440
370
100
94
100
52
Beryllium
7440-41-7
D
/L
0.2 U
0.2 U
0.2 U
0.2 U
0.98
0.85
0.2 U
0.2 U
Beryllium
7440-41-7
T
4
IMAC
/L
0.2 U
0.2 U
0.2 U
0.2 U
1.3
0.83
0.2 U
0.2 U
Boron
7440-42-8
D
/L
120
240
370
470
5200
5400
380
380
Boron
7440-42-8
T
700
02L
/L
120
220
380
430
5200
4900
370
360
Cadmium
7440-43-9
D
/L
0.08 U
0.08 U
0.048 J
0.08 U
0.2
0.16
0.058 J
0.031 J
Cadmium
7440-43-9
T
2
02L
/L
0.08 U
0.08 U
0.04 J
0.08 U
0.26
0.14
0.065 J
0.047 J
Calcium
7440-70-2
T
-
N /L
22400
28600
72000
71400
96400
90800
57800
60000
Chromium
7440-47-3
D
/L
0.26 J+
0.48 J
0.25 J+
0.27 J
0.83 J+
0.31 J
0.3 J
0.53
Chromium
7440-47-3
T
10
02L
/L
0.51
0.96
1.1 J+
0.35 J
0.98
0.32 J
1.3
0.66 J+
Cobalt
7440-48-4
D
/L
0.39 J
0.28 J
4.4
1.7
22.8
26.5
0.68
0.46 J
Cobalt
7440-48-4
T
1
IMAC
/L
0.46 J
0.31 J
4.3
1.4
27.1
21.8
0.93
0.4 J
Copper
7440-50-8
D
/L
0.47 J+
1 U
0.55 J+
1 U
1 UJ
1 U
0.97 J+
0.5 J
Copper
7440-50-8
T
1000
02L
/L
0.73 J
0.48 J
1.2 J+
0.63 J
2.2
1 U
4.2
3.3
Iron
7439-89-6
D
/L
2500
4500
310
710
1800
6500
200
71
Iron
7439-89-6
T
300
1 02L
/L
2800
4900
950
770
2200
6100
1200
240
Lead
7439-92-1
D
/L
0.1 UJ
0.1 U
0.1 UJ
0.1 U
0.35 J+
0.16
0.057 J
0.065 J
Lead
7439-92-1
T
15
02L
/L
0.3
0.18
0.4
0.12
0.52
0.27
0.42
0.1
Magnesium
7439-95-4
T
/L
9870
12700
18500
19200
39500
37700
17200
16700
Manganese
7439-96-5
D
/L
270
210
170
140
7600
8800
390
54
Manganese
7439-96-5
T
50
02L
/L
260
220
180
150
8000
8900
440
52
Mercury
7439-97-6
D
/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Mercury
7439-97-6
T
1
02L
/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Methane
74-82-8
N
/L
14.8
8.9 J+
2.4 J+
1.9 J+
29.2
30.2
1.8 J
1.1 J+
Molybdenum
7439-98-7
D
/L
0.84
0.46 J
0.56
0.21 J
0.5 U
0.5 U
0.97
0.26 J
Molybdenum
7439-98-7
T
/L
0.86
0.59
0.59
0.18 J
0.5 U
0.5 U
1
0.21 J
Nickel
7440-02-0
D
N /L
0.29 J+
0.35 J
1.3 J+
1.7
2.6
1.7
1.6
0.94
Nickel
7440-02-0
T
100
02L
N /L
0.2 J
0.62
1.6
1.5
2.3
1.6
2.1
0.69
Potassium
7440-09-7
T
/L
4620 J
4340 J
6910
6820
6020
6130
6070
4580 J
Selenium
7782-49-2
D
/L
0.5 U
0.5 U
0.34 J
0.5 U
5.2
1.2
0.4 J
0.57
Selenium
7782-49-2
T
20
02L
/L
0.5 U
0.5 U
0.45 J
0.5 U
6.1
3.8
0.64
0.36 J
Sodium
7440-23-5
T
/L
14800
16500
21400
21400
7610
7980
14300
13900
Strontium
7440-24-6
D
/L
530
760
2100
2200
800
750
710
720
Strontium
7440-24-6
T
/L
550
750
2300
2100
860
710
790
680
Thallium
7440-28-0
D
/L
0.1 UJ
0.1 U
0.1 UJ
0.1 U
0.27 J+
0.31
0.017 J
0.1 U
Thallium
7440-28-0
T
0.2
IMAC
/L
0.1 U
0.1 U
0.1 U
0.1 U
0.28
0.24
0.025 J
0.1 U
Vanadium
7440-62-2
D
/L
1 U
1 U
1 U
0.65 J
1 U
1 U
0.52 J
0.69 J
Vanadium
7440-62-2
T
0.3
IMAC
/L
0.43 J
1 U
1.1
0.68 J
1 U
1 U
1.8
0.87 J
Zinc
7440-66-6
D
/L
10 U
IOU
5 J
11
22
17
5.6 J
10 U
Zinc
7440-66-6
T
1000
02L
/L
5 J
3.9 J
9.5 J
7.2 J
24
19
9.2 J
3.1 J+
Total Dissolved Solids
TDS
N
500000
02L
/L
190000
252000
541000
639000
781000
796000
365000
326000
Total Organic Carbon
TOC
N
-
u /L
1000 U
1000 U
1000 U
1000 U
9500
1000 U
23300
1000 UJ
Total Suspended Solids
TSS
N
N /L
41000
7200
15000
6000
6900
3800
111000
2500 U
Alkalinity, CO3
ALK-CO3
N
u /L
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
/L
56800
49100
26200
22100
4900 J
12000
58100
59400
Alkalinity, lab
ALK-LAB
N
/L
56800
49100
26200
22100
4900 J
12000
58100
59400
Chloride
16887-00-6
N
250000
02L
/L
28700
58000
201000 J+
173000
223000 J+
219000
4500
5000
Nitrogen, NO2 plus NO3
NO2-NO3
N
-
/L
20 UJ
20 U
20 UJ
20 U
20 UJ
23
20 J
75
Sulfate
14808-79-8
N
250000
02L
/L
37600
36400
32000
34700
142000J+
125000
178000
183000
Sulfide
18496-25-8
N
-
/L
100 U
100 UJ
100 U
100 UJ
100 U
100 UJ
100 U
100 U
Arsenic
7440-38-2
T
10
02L
/L
0.28 J+
-
0.5 UJ
-
0.324 J+
-
-
-
Chromium
7440-47-3
T
10
02L
/L
0.552 J
0.657 J+
0.836
Iron
7439-89-6
T
300
02L
/L
2800
552 J+
2240
Manganese
7439-96-5
D
/L
335
211
9520
Manganese
7439-96-5
T
50
02L
/L
337
197
9690
As III
7784-46-5
T
-
N /L
0.5 UJ
0.5 UJ
0.5 UJ
As V
10103-60-3
T
/L
0.28 J+
0.5 UJ
0.324 J+
Chromium VI
18540-29-9
D
0.07
DHHS
/L
0.02 UJ
0.02 U
0.02 U
Chromium VI
18540-29-9
T
0.07
DHHS
/L
-
-
Fe II
1345-25-1
T
/L
2540
330
1740
Se IV
10102-18-8
T
/L
2 U
2 U
2 U
Se VI
13410-01-0
T
/L
2 U
2 UJ
2 U
Page 1 of 6

Table 2-11 Groundwater Analytical Results Downgradient and Southeast of Ash Basin - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AB-1BR
AB-1 BR
AB-1D
AB-1D
ABAS
AB-1S
AB-2D
AB-2D
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
7/17/2015
9/28/2015
7/17/2015
9/28/2015
7/17/2015
9/28/2015
7/21/2015
9/29/2015
N
N
N
N
N
N
N
N
AB-1BR
MA-AB-1BR-NS-3Q15
AB-1D
MA-AB-1D-NS-3Q15
ABAS
MA-AB-1S-NS-3Q15
AB-2D
MA-AB-2D-NS-3Q15
Constituent
CAS RN
Fraction
Criteria
Min (range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Uranium, Natural
7440-61-1
T
/L
Radium-226
13982-63-3
T
Ci/L
Radium-228
15262-20-1
T
Ci/L
Uranium-233
13968-55-3
T
/L
Uranium-234
13966-29-5
T
/L
Uranium-236
13982-70-2
T
/L
-
-
-
-
-
-
-
-
Dissolved Oxygen
DO
N
m /L
0.76
0.17
1.16
0.26
1.37
0.12
1.67
0.16
Temperature
TEMP
N
-
-
Deg C
30.6
21.3
21.5
20.9
25.7
21.1
27.4
21.3
H
PH
N
6.5
8.5
02L
SU
6.69
6.66
5.95
8.31
5.29
8.62
6.12
9.36
Turbidity, field
TURB
N
NTU
29.8
5.25
13.92
5.15
7.77
5.33
15.26
4.63
Specific Conductivity field
Sc
N
P S/cm
338.6
156.6
694
721
1059
992
528
479.5
Oxidation Reduction Potential
ORP
N
mV
-95.7
-134.6
92.7
-361.5
144.6
-348.1
68.1
-397
GW Depth TOC
GW DEPTH-TOC
N
ft
-
4.55
-
8.71
-
12.23
-
16
Notes:
pm = micron
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
mg/L = milligrams per liter
mV = millivolts
NTU - nephelometric turbidity units
pCi/L = picocuries per liter
SU = standard unit
J = laboratory estimated concentration
J- = estimated concentration, biased low
J+ = estimated concentration, biased high
U = results not detected at concentrations which equal the laboratory's method reporting limit
02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216
(amended effective January 2015)
02L = North Carolina groundwater standards as specified in T15A NCAC 02L
D = dissolved
Deg C = degree Celsius
DHHS = North Carolina Department of Health and Human Services
DO = dissolved oxygen
GW = groundwater
GWQS = groundwater quality standard
IMAC = Interim Maximum Allow Concentration
N = normal
NS = no standard
T = total
TDS = total dissolved solids
TOC = total organic carbon
Page 2 of 6

Table 2-11 Groundwater Analytical Results Downgradient and Southeast of Ash Basin - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AB-2S
AB-2S
GWA-1BR
GWA-1BR
GWA-11
GWA-1D
GWAAS
GWAAS
MW-10D
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
7/18/2015
9/29/2015
7/19/2015
9/29/2015
7/19/2015
9/29/2015
7/21/2015
9/29/2015
7/14/2015
N
N
N
N
N
N
N
N
N
AB-2S
MA-AB-2S-NS-3Q15
GWA-1BR
MA-GWA-1BR-NS-3Q1
GWA-ID
MA-GWA-1D-NS-3Q15
GWAAS
MA-GWA-1S-NS-3Q15
MW-10D
Constituent
CAS RN
Fraction
Criteria
Min (range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
/L
140
100 U
100 U
100 U
100 U
100 U
100 U
100 U
100 U
Aluminum
7429-90-5
T
/L
630
100
170
110
150
290
2600
52 J
140
Antimony
7440-36-0
D
/L
-
0.5 U
0.5 U
0.5 U
0.16 J
0.3 J
0.19 J
0.16 J
0.75
Antimony
7440-36-0
T
1
IMAC
/L
0.22 J
0.5 U
0.16 J
0.5 U
0.92
0.86
0.26 J
0.19 J
0.66
Arsenic
7440-38-2
D
/L
-
1
0.14 J
0.13 J
0.54
0.29 J
0.13 J
0.14 J
0.23 J
Arsenic
7440-38-2
T
10
02L
/L
0.3 J
0.77 J+
0.31 J
0.3 J+
0.69
0.84 J+
0.22 J
0.25 J+
0.17 J
Barium
7440-39-3
D
/L
78
45
32
39
110
67
35
34
18
Barium
7440-39-3
T
700
02L
/L
92
46
36
39
140
80
87
34
21
Beryllium
7440-41-7
D
/L
-
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.34
0.41
0.2 U
Beryllium
7440-41-7
T
4
IMAC
/L
0.24
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.51
0.44
0.2 U
Boron
7440-42-8
D
/L
40 J
50 U
50 U
50 U
50 U
50 U
34 J
50 U
50 U
Boron
7440-42-8
T
700
02L
/L
37 J
50 U
50 U
50 U
50 U
50 U
50 U
50 U
50 U
Cadmium
7440-43-9
D
/L
-
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.029 J
0.032 J
0.077 J
Cadmium
7440-43-9
T
2
02L
/L
0.041 J
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.039 J
0.08 U
0.08 UJ
Calcium
7440-70-2
T
-
N /L
20700
3980
17900
17800
89000
82000
2920
1740
4120
Chromium
7440-47-3
D
/L
-
0.27 J
0.87 J+
2.4
3.3 J+
0.3 J
0.27 J
0.37 J
0.81 J+
Chromium
7440-47-3
T
10
02L
/L
1.2
0.21 J+
3.6
6.5
4
4.9
1.8
1.6 J+
0.98 J+
Cobalt
7440-48-4
D
/L
-
20.2
1.4
0.95
0.5 U
0.5 U
5.5
6.1
0.5 U
Cobalt
7440-48-4
T
1
IMAC
/L
3.1
15.4
1.7
0.88
0.16 J
1.3
5.5
5.1
0.5 U
Copper
7440-50-8
D
/L
-
1 U
1.7
0.37 J
3
1 U
0.91 J+
0.3 J
0.31 J+
Copper
7440-50-8
T
1000
02L
/L
1.2 J+
1 UJ
1.5
1.2 J+
0.78 J+
2.1 J+
0.98 J
0.58 J+
0.71 J
Iron
7439-89-6
D
/L
36 J
7700
160
200
50 U
50 U
150
1200
50 U
Iron
7439-89-6
T
300
02L
/L
470
7500
780
4300
140
470
3900
1300
170 J+
Lead
7439-92-1
D
/L
-
0.1 U
0.1 UJ
0.1 U
0.44 J+
0.1 U
0.15
0.1 U
0.073 J
Lead
7439-92-1
T
15
02L
/L
0.75
0.099 J
0.33
0.18
0.071 J
0.54
1.3
0.24
0.14 J+
Magnesium
7439-95-4
T
/L
3390
1280
5380
6290
6380
30300
737
494
716
Manganese
7439-96-5
D
/L
420
1800
45
17
5 U
37
480
470
3.8 J
Manganese
7439-96-5
T
50
02L
/L
330
1700
54
46
8.5
140
510
470
11
Mercury
7439-97-6
D
/L
0.2 UJ
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Mercury
7439-97-6
T
1
02L
/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Methane
74-82-8
N
/L
24
271
0.73 J
1.6 J+
34.9
55
10 U
1.2 J+
1.9 J+
Molybdenum
7439-98-7
D
/L
-
0.31 J
2.8
1.6
41.2
26.5
0.5 U
0.15 J
0.44 J
Molybdenum
7439-98-7
T
/L
0.53
0.16 J
3.7
2.1
45.1
23.4
0.11 J
0.18 J
0.35 J+
Nickel
7440-02-0
D
/L
-
1.7
3.6
2.2
0.28 J
1.4
1.2
1.9
0.37 J
Nickel
7440-02-0
T
100
02L
/L
1.2
1.3
4.5
2.1
0.7
5.4
2.4
3
0.54
Potassium
7440-09-7
T
/L
2810 J
5000 U
3550 J
2840 J
48000
12500
5000 U
5000 U
5000 U
Selenium
7782-49-2
D
/L
-
0.5 U
0.41 J
0.53
0.54
0.5 U
0.37 J
0.49 J
0.28 J
Selenium
7782-49-2
T
20
02L
/L
1.4
0.5 U
0.43 J
0.3 J
0.57
0.5 U
0.83
0.29 J
0.3 J
Sodium
7440-23-5
T
/L
4670 J
5000 U
10500
10700
27500
20600
9810
7830
6690
Strontium
7440-24-6
D
/L
89
24
250
300
1600
1100
58
44
98
Strontium
7440-24-6
T
/L
100
23
260
280
1900
1100
68
41
110
Thallium
7440-28-0
D
/L
-
0.07 J
0.1 U
0.1 U
0.1 U
0.1 U
0.02 J
0.1 U
0.06 J
Thallium
7440-28-0
T
0.2
IMAC
/L
0.059 J
0.068 J
0.1 U
0.1 U
0.016 J
0.1 U
0.023 J
0.1 U
0.1 UJ
Vanadium
7440-62-2
D
/L
-
1 U
2.5
3.9
8.4
0.32 J
0.3 J
1 U
3
Vanadium
7440-62-2
T
0.3
IMAC
/L
1.8
1 U
3.5
3.6
9.3
2.4
1.7
0.58 J
3.2
Zinc
7440-66-6
D
/L
9.7 J
16
11
10 U
10 U
1 o U
12
3.2 J
10 U
Zinc
7440-66-6
T
1000
02L
/L
9.8 J
17 J+
101
3.7 J+
10 U
3.9 J+
15
10 UJ
6.1 J
Total Dissolved Solids
TDS
N
500000
02L
/L
102000
25000 U
158000
142000
492000
389000
57000
25000 U
75000
Total Organic Carbon
TOC
N
/L
790 J
570 J+
1000 U
1000 UJ
3200
1000 UJ
600 J
1000 UJ
1000 U
Total Suspended Solids
TSS
N
/L
15600
5000 U
28400
11400
65600
157000
140000
9900
2600 J+
Alkalinity, CO3
ALK-CO3
N
/L
5000 U
5000 U
5000 U
5000 U
98800
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
/L
41000
21600
35700
35200
60200
151000
23000
14600
21600
Alkalinity, lab
ALK-LAB
N
/L
41000
21600
35700
35200
159000
151000
23000
14600
21600
Chloride
16887-00-6
N
250000
02L
/L
7800 J
3200
3500
3700
4500
2800
3000
3300
1300
Nitrogen, NO2 plus NO3
NO2-NO3
N
/L
790 J-
27
610
610
20 U
20 U
300
380
370 J-
Sulfate
14808-79-8
N
250000
02L
/L
19600J
9901
43800
59900
189000
228000
4000
3700
3500
Sulfide
18496-25-8
N
/L
100 U
100 U
100 U
100 U
100 U
100 U
100 U
100 U
100 U
Arsenic
7440-38-2
T
10
02L
/L
-
-
-
-
-
-
-
-
0.5 UJ
Chromium
7440-47-3
T
10
02L
/L
9.71 J+
Iron
7439-89-6
T
300
02L
/L
98.2 J+
Manganese
7439-96-5
D
/L
4.24 J+
Manganese
7439-96-5
T
50
02L
/L
15.7 J+
As III
7784-46-5
T
/L
0.5 UJ
As V
10103-60-3
T
/L
0.5 UJ
Chromium VI
18540-29-9
D
0.07
DHHS
/L
0.42
Chromium VI
18540-29-9
T
0.07
DHHS
/L
-
Fe II
1345-25-1
T
/L
30 UJ
Se IV
10102-18-8
T
pq/L
2 U
Se VI
13410-01-0
T
/L
2 U
Page 3 of 6

Table 2-11 Groundwater Analytical Results Downgradient and Southeast of Ash Basin - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
AB-2S
AB-2S
GWA-16R
GWA-1BR
GWA-1D
GWA-1D
GWAAS
GWAAS
MW-10D
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
Round 2
Round 1
7/18/2015
9/29/2015
7/19/2015
9/29/2015
7/19/2015
9/29/2015
7/21/2015
9/29/2015
7/14/2015
N
N
N
N
N
N
N
N
N
AB-2S
MA-AB-2S-NS-3Q15
GWA-1BR
MA-GWA-1BR-NS-3Q1
GWA-1D
MA-GWA-1D-NS-3Q15
GWAAS
MA-GWA-1S-NS-3Q15
MW-10D
Constituent
CAS RN
Fraction
Criteria
Min (range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Uranium, Natural
7440-61-1
T
/L
Radium-226
13982-63-3
T
Ci/L
Radium-228
15262-20-1
T
Ci/L
Uranium-233
13968-55-3
T
/L
Uranium-234
13966-29-5
T
/L
Uranium-236
13982-70-2
T
/L
Dissolved Oxygen
DO
N
m /L
1.5
0.22
3.61
4.6
0.66
0.16
3.52
2.69
3.7
Temperature
TEMP
N
-
Deg C
23.2
21.9
26.9
18.6
28.3
19.4
23.7
21.2
16.9
H
PH
N
6.5
8.5
02L
SU
5.9
5.83
6.39
6.51
11.24
8.79
5.51
5.31
6.4
Turbidity, field
TURB
N
-
-
NTU
9.2
6.7
8.68
6.14
8.97
65.8
20.15
7.36
8
Specific Conductivity field
Sc
N
P S/cm
160.9
20.6
217.9
235.3
1295
640
68.7
69.6
58.1
Oxidation Reduction Potential
ORP
N
mV
154.5
-0.4
81.3
26.5
-17.3
-113.2
207.2
116
-1.6
GW Depth TOC
GW DEPTH-TOC
N
ft
-
22.56
-
42.55
-
46
-
46.72
-
Notes:
pm = micron
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
mg/L = milligrams per liter
mV = millivolts
NTU - nephelometric turbidity units
pCi/L = picocuries per liter
SU = standard unit
J = laboratory estimated concentration
J- = estimated concentration, biased low
J+ = estimated concentration, biased high
U = results not detected at concentrations which equal the laboratory's method reporting limit
02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216
(amended effective January 2015)
02L = North Carolina groundwater standards as specified in T15A NCAC 02L
D = dissolved
Deg C = degree Celsius
DHHS = North Carolina Department of Health and Human Services
DO = dissolved oxygen
GW = groundwater
GWQS = groundwater quality standard
IMAC = Interim Maximum Allow Concentration
N = normal
NS = no standard
T = total
TDS = total dissolved solids
TOC = total organic carbon
Page 4 of 6

Table 2-11 Groundwater Analytical Results Downgradient and Southeast of Ash Basin - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
MW-10S
MW-6D
MW-7S
MW-7S
MW-8D
MW-8S
MW-9D
MW-9S
Round 1
Round 2
Round 1
Round 2
Round 2
Round 2
Round 2
Round 2
7/14/2015
9/30/2015
7/17/2015
9/29/2015
9/29/2015
9/29/2015
9/30/2015
9/29/2015
N
N
Mnd2
N
N
N
N
N
N
MW-10S
MA-MW-6D-NS-3Q15
MA-M
MW-7S
MA-MW-7S-NS-3Q15
MA-MW-8D-NS-3Q15
MA-MW-8S-NS-3Q15
MA-MW-9D-NS-3Q15
MA-MW-9S-NS-3015
Constituent
CAS RN
Fraction
Criteria
Min (range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
/L
100 U
100 U
100 U
2100
1700
100 U
100 U
100 U
100 U
Aluminum
7429-90-5
T
/L
140
140
100 U
4600
1700
85 J
100 U
90 J
100 U
Antimony
7440-36-0
D
/L
0.5 U
0.5 U
2.2
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
Antimony
7440-36-0
T
1
IMAC
/L
0.5 U
0.5 U
2
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
0.5 U
Arsenic
7440-38-2
D
/L
0.5 U
0.5 U
0.26 J
10.2
5.3
0.12 J
0.14 J
0.13 J
0.5 U
Arsenic
7440-38-2
T
10
02L
/L
0.5 U
0.5 U
0.21 J
10.4
7.3
0.12 J
0.33 J
0.13 J
0.15 J
Barium
7440-39-3
D
/L
38
150
32
81
62
15
130
110
250
Barium
7440-39-3
T
700
02L
/L
41
160
30
300
60
16
130
110
240
Beryllium
7440-41-7
D
/L
0.094 J
0.2 U
0.2 U
1.6
1.7
0.12 J
0.2 U
0.2 U
0.2 U
Beryllium
7440-41-7
T
4
IMAC
/L
0.11 J
0.2 U
0.2 U
1.6
1.3
0.12 J
0.2 U
0.2 U
0.2 U
Boron
7440-42-8
D
/L
50 U
83
45 J
5300
5700
250
230
460
26 J
Boron
7440-42-8
T
700
02L
/L
50 U
69
41 J
5300
5200
260
230
410
170 J+
Cadmium
7440-43-9
D
/L
0.056 J
0.062 J
0.028 J
0.33
0.38
0.08 U
0.08 U
0.14
0.032 J
Cadmium
7440-43-9
T
2
02L
/L
0.027 J+
0.06 J
0.08 U
0.32
0.33
0.08 U
0.041 J
0.12
0.051 J
Calcium
7440-70-2
T
-
N /L
133
23300
44200
83200
87200
80000
128000
61000
57700
Chromium
7440-47-3
D
/L
1.8 J+
0.26 J
1.1
18.7
0.42 J
0.45 J
0.33 J
0.31 J
0.29 J
Chromium
7440-47-3
T
10
02L
/L
2.7
0.53
0.45 J+
6.3
0.36 J+
0.5 J+
0.3 J+
0.38 J+
0.19 J+
Cobalt
7440-48-4
D
/L
0.5 U
0.5 U
0.5 U
56.4
54.3
0.35 J
1.3
1.3
0.5 U
Cobalt
7440-48-4
T
1
IMAC
/L
0.17 J
0.21 J
0.5 U
57.6
46.8
0.41 J
0.85
1.3
0.14 J
Copper
7440-50-8
D
/L
1.7 J+
1.9
0.29 J
1.1 J+
1.2
0.48 J
0.45 J
2
0.44 J
Copper
7440-50-8
T
1000
02L
/L
1 U
1.7 J+
0.85 J+
3
0.73 J+
0.88 J
0.32 J
2.5
0.32 J
Iron
7439-89-6
D
/L
50 U
110
50 U
110
50 U
740
82
56
50 U
Iron
7439-89-6
T
300
02L
/L
180
300
50 U
2200 J+
50 U
920
750
150
64
Lead
7439-92-1
D
/L
0.055 J
0.1 U
0.1 U
0.4 J+
0.52
0.17
0.1 U
0.11
0.046 J
Lead
7439-92-1
T
15
02L
/L
0.047 J+
0.22
0.1 U
2.9
0.36 J
0.28
0.1 U
0.2
0.088 J
Magnesium
7439-95-4
T
/L
1030
8790
4490
36400
35700
4870
24100
9760
13300
Manganese
7439-96-5
D
/L
8.7
9
5 U
5800
5200
120
4800
970
210
Manganese
7439-96-5
T
50
02L
/L
13
11
5 U
6000
5100
120
3800
910
300
Mercury
7439-97-6
D
/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Mercury
7439-97-6
T
1
02L
/L
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
0.2 U
Methane
74-82-8
N
/L
2.8 J
1.3 J+
0.78 J+
1.6 J+
8.4 J+
1.6 J+
55.6
1.8 J+
1.4 J+
Molybdenum
7439-98-7
D
/L
0.5 U
0.16 J
5.4
0.33 J
0.5 U
0.16 J
1.1
0.5 U
0.52
Molybdenum
7439-98-7
T
/L
0.11 J
0.17 J
4.4
0.19 J+
0.5 U
0.16 J
0.88
0.12 J
0.8
Nickel
7440-02-0
D
/L
2.5
0.93
0.49 J
13.1
1.9
0.49 J
1.4
4.8
0.34 J
Nickel
7440-02-0
T
100
02L
/L
2.6
0.96
0.5 UJ
5
1.9 J+
0.47 J+
1.2 J+
4.3
0.28 J+
Potassium
7440-09-7
T
/L
5000 U
3910 J
3540 J
4240 J
4130 J
2990 J
5620
3760 J
4860 J
Selenium
7782-49-2
D
/L
0.5 U
0.25 J
0.24 J
15.2
1.7
0.5 U
0.49 J
0.5 U
0.5 U
Selenium
7782-49-2
T
20
02L
/L
0.5 U
0.23 J
0.5 U
15
9.7
0.5 U
1
0.5 U
0.5 U
Sodium
7440-23-5
T
/L
5000 U
12800
9120
6780
6700
10500
13900
13100
28800
Strontium
7440-24-6
D
/L
3.7 J
840
670
600
620
1700
1400
1300
920
Strontium
7440-24-6
T
/L
4 J
850
660
640
610
1800
1400
1200
870
Thallium
7440-28-0
D
/L
0.029 J
0.1 U
0.043 J
0.32 J+
0.56
0.1 U
0.027 J
0.018 J
0.022 J
Thallium
7440-28-0
T
0.2
IMAC
/L
0.088 J+
0.1 U
0.1 U
0.37
0.4 J
0.1 U
0.024 J
0.1 U
0.029 J
Vanadium
7440-62-2
D
/L
1 U
0.33 J
0.29 J
1 U
1 U
1 U
1 U
0.46 J
1.8
Vanadium
7440-62-2
T
0.3
IMAC
/L
0.29 J
0.89 J
1 U
4.6
1 U
0.49 J+
0.98 J+
0.62 J
1.8
Zinc
7440-66-6
D
/L
3 J
7.7 J
6 J
30
24
10 U
10 U
12
10 U
Zinc
7440-66-6
T
1000
02L
/L
9.5 J
8.4 J
6.1 J
34 J+
22
10 UJ
10 UJ
6.8 J
10 U
Total Dissolved Solids
TDS
N
500000
02L
/L
25000 U
219000
227000
800000
916000
329000
471000
335000
346000
Total Organic Carbon
TOC
N
/L
1000 U
1000 U
1000 U
1000 U
1000 U
1000 U
1800
1000 UJ
540 J
Total Suspended Solids
TSS
N
/L
2800
8300
2500 U
98800
2500 U
12400
3300
5200
10800
Alkalinity, CO3
ALK-CO3
N
/L
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
/L
5400
31200
71300
5000 U
5000 U
117000
403000
33200
188000
Alkalinity, lab
ALK-LAB
N
/L
5400
31200
71300
5000 U
5000 U
117000
403000
33200
188000
Chloride
16887-00-6
N
250000
02L
/L
840 J
57500
6700
239000 J+
235000
6400
1800
6100 J-
10500
Nitrogen, NO2 plus NO3
NO2-NO3
N
/L
21 J-
40
79
550 J-
820
11 J
74
12 J+
2300
Sulfate
14808-79-8
N
250000
02L
/L
1000 U
7100
70500
153000J+
130000
107000
41700
173000
63100
Sulfide
18496-25-8
N
/L
100 U
100 U
100 UJ
100 U
100 UJ
100 U
100 U
100 U
100 U
Arsenic
7440-38-2
T
10
02L
/L
0.5 UJ
-
0.5 UJ
-
0.5 UJ
-
-
-
-
Chromium
7440-47-3
T
10
02L
/L
4.76 J+
0.796
0.596
Iron
7439-89-6
T
300
02L
/L
27.5 J+
7.59 J
86 J
Manganese
7439-96-5
D
/L
8.84 J+
0.397 J
7390
Manganese
7439-96-5
T
50
02L
/L
9.94 J+
4.12
7410
As III
7784-46-5
T
/L
0.5 UJ
0.209 J-
0.209 J-
As V
10103-60-3
T
/L
0.5 UJ
0.5 U
0.5 U
Chromium VI
18540-29-9
D
0.07
DHHS
/L
0.14
-
-
Chromium VI
18540-29-9
T
0.07
DHHS
/L
-
0.24
0.02 U
Fe II
1345-25-1
T
I pg/L
1 30 UJ
30 UJ
84.2 J-
Se IV
10102-18-8
T
I pg/L
2 U
2 UJ
2 U
Se VI
13410-01-0
T
/L
2 U
2 U
2 U
Page 5 of 6

Table 2-11 Groundwater Analytical Results Downgradient and Southeast of Ash Basin - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
MW-10S
MW-6D
MW-7S
MW-7S
MW-8D
MW-8S
MW-9D
MW-9S
Round 1
Round 2
Round 1
Round 2
Round 2
Round 2
Round 2
Round 2
7/14/2015
9/30/2015
7/17/2015
9/29/2015
9/29/2015
9/29/2015
9/30/2015
9/29/2015
N
N
Mnd2
N
N
N
N
N
N
MW-10S
MA-MW-6D-NS-3Q15
MA-M
MW-7S
MA-MW-7S-NS-3Q15
MA-MW-8D-NS-3Q15
MA-MW-8S-NS-3Q15
MA-MW-9D-NS-3Q15
MA-MW-9S-NS-3015
Constituent
CAS RN
Fraction
Criteria
Min (range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Uranium, Natural
7440-61-1
T
/L
1.67
Radium-226
13982-63-3
T
Ci/L
5.48 J
Radium-228
15262-20-1
T
Ci/L
2.23 J
Uranium-233
13968-55-3
T
/L
0.05 U
Uranium-234
13966-29-5
T
/L
0.05 U
Uranium-236
13982-70-2
T
/L
0.05 U
-
-
-
-
-
Dissolved Oxygen
DO
N
m /L
5.6
4.5
5.68
2.8
2.46
0.53
0.74
0.16
0.43
Temperature
TEMP
N
-
Deg C
19.1
24.9
22.04
20.5
23.76
24.07
23.33
18
21.5
H
PH
N
6.5
8.5
02L
SU
5.2
5.79
7.44
4.3
4.23
6.3
6.35
5.66
6.73
Turbidity, field
TURB
N
NTU
7.5
7.91
0.78
3.2
3.71
9.24
9.18
6.6
6.57
Specific Conductivity field
Sc
N
P S/cm
16.8
310
330
1098
1230
490
830
479
527.2
Oxidation Reduction Potential
ORP
N
my
4.5
-143.4
-87.8
312.6
-90.4
-141.9
-143.6
93.2
51.9
GW Depth TOC
GW DEPTH-TOC
N
ft
-
23.9
8.82
15.37
17.79
20.52
21.04
2.07
Notes:
pm = micron
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
mg/L = milligrams per liter
my = millivolts
NTU - nephelometric turbidity units
pCi/L = picocuries per liter
SU = standard unit
J = laboratory estimated concentration
J- = estimated concentration, biased low
J+ = estimated concentration, biased high
U = results not detected at concentrations which equal the laboratory's method reporting limit
02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216
(amended effective January 2015)
02L = North Carolina groundwater standards as specified in T15A NCAC 02L
D = dissolved
Deg C = degree Celsius
DHHS = North Carolina Department of Health and Human Services
DO = dissolved oxygen
GW = groundwater
GWQS = groundwater quality standard
IMAC = Interim Maximum Allow Concentration
N = normal
NS = no standard
T = total
TDS = total dissolved solids
TOC = total organic carbon
Page 6 of 6

Table 2-12 Constituents of Interest Evaluation
Corrective Action Plan Part 2
Marshall Steam Stations Ash Basin
Constituent:
Fraction:
Unit:
NC GW Criteria:
Criteria Source:
Turbidity, field
N
NTU
FOR SCREENING
pH
N
SU
8.5
02L
Arsenic
T
ug/I
10
02L
Iron
T
ug/I
300
02L
Manganese
T
ug/I
50
02L
Chromium (VI)
T
ug/I
0.07
DHHS
Antimony
T
ug/I
1
IMAC
Arsenic
T
ug/I
10
02L
Barium
T
ug/I
700
02L
Beryllium
T
ug/I
4
IMAC
Boron
T
ug/I
700
02L
Cadmium
T
ug/I
2
02L
Chromium
T
ug/I
10
02L
Cobalt
T
ug/I
1
IMAC
PPBC (Minimum (for ranges)):
PPBC:
-
10
6.5
8.5
-
5
-
467.1
-
48
-
2.8
-
2.5
-
5
-
157.3
-
1
-
100
No PPBC
-
11.3
-
2.5
Well
Matrix
Event
Date
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Fla
AB-10D
WG
Round 1
7/18/2015
3.5
6.2
1200
6.6
AB-10D
WG
Round 2
9/28/2015
7.64
6.13
1300
6.6
AB-10S
PW
Round 1
7/16/2015
20.8
410
20600
4.1
AB-10S
PW
Round 2
9/28/2015
8.36
568
27400
-
AB-10SL
PW
Round 1
7/10/2015
18.4
-
1.3
1330
9400
3.6
AB-10SL
PW
Round 2
9/28/2015
7.64
6.13
-
1330
9500
3.3
AB-11D
WG
Round 1
7/17/2015
10
-
-
-
AB-11D
WG
Round 2
9/28/2015
8.36
5.75
-
AB-11S
WG
Round 1
7/18/2015
13.8
5.5
4.4
AB-11S
WG
Round 2
9/28/2015
4.1
5.76
-
-
AB-12D
WG
Round 1
7/8/2015
7.8
-
155
3500
AB-12D
WG
Round 2
9/29/2015
8.29
2900
AB-12S
PW
Round 1
7/8/2015
3.5
152 J+
15600 J
7630 J
145
66600
AB-12S
PW
Round 2
9/29/2015
2.87
-
217
79100
AB-12S
PW
Round 2
10/1/2015
0.37
-
217
80300
AB-12SL
PW
Round 1
7/8/2015
7.3
3420 J+
7460
921
6380
780
3300
AB-12SL
PW
Round 2
9/29/2015
6.43
-
4000
730
3600
-
AB-13D
WG
Round 1
7/11/2015
13.8
-
-
-
2.4
AB-13D
WG
Round 2
9/28/2015
5.92
-
-
1.3
AB-13S
PW
Round 1
7/11/2015
7.7
21.8
591
1200
4.8
AB-13S
PW
Round 2
9/28/2015
4.08
21.7
549
1200
5.5
AB-14D
WG
Round 1
7/12/2015
8.9
5.9
-
-
-
-
AB-14D
WG
Round 2
9/28/2015
6.96
5.66
-
-
AB-14S
PW
Round 1
7/12/2015
9.8
6.4
799
10500
AB-14S
PW
Round 2
9/28/2015
8.34
6.36
752
11100
AB-15BR
WG
Round 1
7/13/2015
7.7
-
1520
300
AB-15BR
WG
Round 2
9/29/2015
5.63
-
AB-15D
WG
Round 1
7/13/2015
9.7
2890
228
AB-15D
WG
Round 2
9/29/2015
7.24
-
AB-15S
PW
Round 1
7/13/2015
6.1
511
3100
2.7
AB-15S
PW
Round 2
9/28/2015
4.85
638
3500
1.3
AB-15SL
PW
Round 1
7/13/2015
30.9
709 J+
17300
3630
864
930
6.1
AB-15SL
PW
Round 2
9/29/2015
8.81
-
560
-
8.5
AB-16D
WG
Round 1
7/17/2015
10
4.7
AB-16D
WG
Round 2
9/30/2015
2.33
-
AB-16S
WG
Round 1
7/17/2015
12.6
5.9
22.6
AB-16S
WG
Round 2
9/30/2015
1.25
5.46
23.8
AB-17D
WG
Round 1
7/12/2015
21.4
2.5
AB-17D
WG
Round 2
10/1/2015
2.52
-
AB-17S
PW
Round 1
7/14/2015
8.6
238
6000
AB-17S
PW
Round 2
9/30/2015
2.39
6.47
237
8300
AB-18D
WG
Round 1
7/19/2015
45.6
-
-
AB-18D
WG
Round 2
9/28/2015
13.4
6.47
-
-
AB-18S
PW
Round 1
7/14/2015
6.32
2060 J-
2100
AB-18S
PW
Round 2
9/28/2015
5.39
9.55
2490
2000
AB-1BR
WG
Round 1
7/17/2015
29.8
-
2800
337
-
-
AB-1 BR
WG
Round 2
9/28/2015
5.25
-
-
-
AB-1 D
WG
Round 1
7/17/2015
13.92
5.95
552 J+
197
4.3
AB-1 D
WG
Round 2
9/28/2015
5.15
-
1.4
AB-1S
WG
Round 1
7/17/2015
7.77
5.29
2240
9690
5200
27.1
AB-1S
WG
Round 2
9/28/2015
5.33
8.62
-
4900
21.8
AB-20D
WG
Round 1
7/17/2015
9.6
9.2
-
-
AB-20D
WG
Round 2
9/29/2015
15
11.24
-
-
-
AB-20S
PW
Round 1
7/16/2015
358.2
-
26.6
95.4
5.4
41700
5.3
71.6
423
AB-20S
PW
Round 2
9/29/2015
516
-
19.2
178
8.7
44500
3.7
618
477
AB-21D
WG
Round 1
7/15/2015
3.09
5.91
-
-
-
-
-
-
6.4
AB-21 D
WG
Round 2
9/30/2015
3.63
6.21
-
-
3.5
AB-21S
PW
Round 1
7/15/2015
3.22
5.9
439
1300
4.1
AB-21S
PW
Round 2
9/30/2015
6.66
556
1100
3.4
AB-21D
WG
Round 1
7/21/2015
15.26
6.12
-
-
-
AB-2D
WG
Round 2
9/29/2015
4.63
9.36
Page 1 of 8

Table 2-12 Constituents of Interest Evaluation
Corrective Action Plan Part 2
Marshall Steam Stations Ash Basin
Constituent:
Fraction:
Unit:
NC GW Criteria:
Criteria Source:
Turbidity, field
N
NTU
FOR SCREENING
pH
N
SU
8.5
02L
Arsenic
T
ug/I
10
02L
Iron
T
ug/I
300
02L
Manganese
T
ug/I
50
02L
Chromium (VI)
T
ug/I
0.07
DHHS
Antimony
T
ug/I
1
IMAC
Arsenic
T
ug/I
10
02L
Barium
T
ug/I
700
02L
Beryllium
T
ug/I
4
IMAC
Boron
T
ug/I
700
02L
Cadmium
T
ug/I
2
02L
Chromium
T
ug/I
10
02L
Cobalt
T
ug/I
1
IMAC
PPBC (Minimum (for ranges)):
PPBC:
-
10
6.5
8.5
-
5
-
467.1
-
48
-
2.8
-
2.5
-
5
-
157.3
-
1
-
100
No PPBC
-
11.3
-
2.5
Well
Matrix
Event
Date
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Fla
AB-2S
WG
Round 1
7/18/2015
9.2
5.9
3.1
AB-2S
WG
Round 2
9/29/2015
6.7
5.83
15.4
AB-31D
WG
Round 1
7/11/2015
7.5
6.3
-
AB-3D
WG
Round 2
9/30/2015
4.86
6.11
-
AB-3S
PW
Round 1
7/9/2015
1.3
4.3
13.5
AB-3S
PW
Round 2
9/29/2015
1.17
3.86
7.7
AB-41D
WG
Round 1
7/14/2015
6.1
6.3
1690 J+
85.3 J+
-
AB-4D
WG
Round 2
10/1/2015
2.9
6.24
AB-4S
PW
Round 1
7/14/2015
7.8
6
AB-4S
PW
Round 2
9/30/2015
5.99
6.35
AB-4SL
PW
Round 1
7/9/2015
7.7
-
678 J+
923
850
AB-4SL
PW
Round 1
7/15/2015
9.6
-
-
-
-
AB-4SL
PW
Round 2
9/30/2015
5.07
8.63
988
770
-
AB-5BR
WG
Round 1
7/17/2015
4
6.1
-
-
7.9
AB-5BR
WG
Round 2
10/1/2015
3.02
5.54
4.8
AB-5D
WG
Round 1
7/14/2015
26.66
5.9
9.4
AB-51D
WG
Round 2
10/1/2015
8.42
5.61
-
8.7
AB-5S
PW
Round 1
7/14/2015
6.16
2.84
-
23.5
1500
3.4
53.9
134
AB-5S
PW
Round 2
10/1/2015
2.91
2.52
-
12.2
18.9
1100 J+
3.3
25.5
130
AB-6BR
WG
Round 1
7/15/2015
5.6
10.4
1.3
-
-
-
-
AB-6BR
WG
Round 2
10/1/2015
2.21
11.45
-
-
-
AB-6D
WG
Round 1
7/15/2015
5.8
5.9
5500
2.2
AB-61D
WG
Round 2
10/1/2015
2.05
5.71
-
5300
1.9
AB-6S
PW
Round 1
7/15/2015
7.5
3180 J+
6200
-
AB-6S
PW
Round 2
10/1/2015
5.3
3170
6300
AB-71D
WG
Round 1
7/16/2015
7.9
10.7
-
-
AB-7D
WG
Round 2
9/30/2015
8.58
-
AB-8D
WG
Round 1
7/15/2015
17.2
1.4
AB-81D
WG
Round 2
9/28/2015
6.23
-
-
-
AB-8S
PW
Round 1
7/15/2015
2.6
3.8
103
790
45.5
AB-8S
PW
Round 2
9/28/2015
9.53
5.92
86.5
1500
57.9
AB-9BR
WG
Round 1
7/17/2015
7
9.6
-
-
-
AB-9BR
WG
Round 2
9/30/2015
7.47
10.27
-
AB-9D
WG
Round 1
7/16/2015
11.5
6.4
28.1
AB-91D
WG
Round 2
9/29/2015
7.72
6.2
AB-9S
WG
Round 1
7/16/2015
2.9
5.5
2.2
AB-9S
WG
Round 2
9/29/2015
5.51
5.85
-
2.8
AL-1D
WG
Round 1
7/16/2015
6.6
6.24
1300
1.3
AL-1D
WG
Round 2
9/28/2015
6.42
6.06
800
1500
-
AL-1D
WG
Round 2
9/29/2015
6.1
5.94
0.16
-
-
-
ALAS
WG
Round 1
7/16/2015
5.62
4.48
-
9.9
4600
30.9
11.8
ALAS
WG
Round 2
9/28/2015
6.53
4.59
-
7.7
4700
-
10.2
ALAS
WG
Round 2
9/29/2015
15.5
4.49
1820
4610
0.14
-
-
-
-
AL-2BR
WG
Round 1
7/18/2015
9.87
8.78
-
-
-
2100
17.5
AL-2BR
WG
Round 2
10/7/2015
43.01
9.5
1850 J
1.6
1.3
2000
-
-
AL-2D
WG
Round 1
7/18/2015
6.03
-
-
-
-
-
6500
15.8
AL-2D
WG
Round 2
10/1/2015
-
-
919
6930
-
-
AL-2D
WG
Round 2
10/1/2015
7.93
6.21
-
6500
-
20
AL-2S
WG
IRoundl
7/15/2015
30.8
5.4
-
960
6500
15.5
4.4
AL-2S
WG
Round 2
10/1/2015
-
-
0.9 J
-
-
-
-
AL-2S
WG
Round 2
10/1/2015
13.3
5.38
-
7100
-
AL-3D
WG
Round 1
7/15/2015
7.3
6.29
4000
1.3
AL-3D
WG
Round 2
9/28/2015
4.81
3800
1.1
AL-3S
PW
Round 1
7/16/2015
39.51
12.2
189
73400
6.3
-
4.1
AL-3S
PW
Round 2
9/29/2015
847
-
18.8
3850
79700
-
72.7
11.2
AL-41D
WG
Round 1
7/20/2015
21.32
6.06
-
-
15200
-
7.4
AL-4D
WG
Round 2
9/28/2015
6.19
5.91
20600
36.7
2.3
BG-11D
WG
Round 1
7/17/2015
8.2
6.2
51.7
3.3
BG-1D
WG
Round 2
9/29/2015
8.37
6.16
-
BG-1D
WG
Round 3
11/11/2015
-
-
1.3
1.2
BG-11D
WG
Round
12/11/2015
3.2
Page 2 of 8

Table 2-12 Constituents of Interest Evaluation
Corrective Action Plan Part 2
Marshall Steam Stations Ash Basin
Constituent:
Fraction:
Unit:
NC GW Criteria:
Criteria Source:
Turbidity, field
N
NTU
FOR SCREENING
pH
N
SU
8.5
02L
Arsenic
T
ug/I
10
02L
Iron
T
ug/I
300
02L
Manganese
T
ug/I
50
02L
Chromium (VI)
T
ug/I
0.07
DHHS
Antimony
T
ug/I
1
IMAC
Arsenic
T
ug/I
10
02L
Barium
T
ug/I
700
02L
Beryllium
T
ug/I
4
IMAC
Boron
T
ug/I
700
02L
Cadmium
T
ug/I
2
02L
Chromium
T
ug/I
10
02L
Cobalt
T
ug/I
1
IMAC
PPBC (Minimum (for ranges)):
PPBC:
-
10
6.5
8.5
-
5
-
467.1
-
48
-
2.8
-
2.5
-
5
-
157.3
-
1
-
100
No PPBC
-
11.3
-
2.5
Well
Matrix
Event
Date
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Fla
BG-1S
WG
Round 1
7/17/2015
7.7
6.1
153
1.2
BG-1S
WG
Round 2
9/29/2015
9.89
6.06
-
BG-1S
WG
Round 3
11/11/2015
9
6.3
3.4
BG-1S
WG
Round 4
12/11/2015
-
-
3.1
-
BG-2BR
WG
Round 1
7/18/2015
413.7
80.4
11.9
BG-2BR
JWG
Round 2
9/29/2015
9.97
-
-
BG-2BR
WG
Round 3
11/11/2015
9.4
6
BG-2BR
WG
Round 4
12/11/2015
1.14
-
7.6
BG-2S
WG
Round 1
7/19/2015
9.6
10.9
BG-2S
WG
Round 2
9/28/2015
12.2
-
BG-2S
WG
Round 3
11/13/2015
8.9
6.1
BG-2S
WG
Round 4
12/11/2015
7.9
6.3
-
BG-3D
WG
Round 1
7/20/2015
6.2
-
760
1.8
6G-3D
WG
Round 2
9/28/2015
8.38
-
820
-
BG-3D
WG
Round 3
11/11/2015
4.4
3.7
880
BG-31D
WG
Round 4
12/11/2015
0.9
-
1.9
820
-
-
BG-3S
WG
Round 1
7/18/2015
53.9
6.4
-
-
73.7
5
BG-3S
WG
Round 2
9/28/2015
149
-
-
750
56.7
3.8
BG-3S
WG
Round 3
11/13/2015
200.1
6.3
5.7
2.4
1100
183
10.8
BG-3S
WG
Round 4
12/21/2015
104.6
-
5.2
-
1300
356
17.8
GWA-1BR
WG
Round 1
7/19/2015
8.68
6.39
-
-
-
1.7
GWA-1BR
WG
Round 2
9/29/2015
6.14
-
GWA-1D
WG
Round 1
7/19/2015
8.97
11,24
-
GWA-1 D
WG
Round 2
9/29/2015
65.8
8.79
1.3
GWA-IS
WG
Round 1
7/21/2015
20.15
5.51
5.5
GWA-IS
WG
Round 2
9/29/2015
7.36
5.31
-
5.1
GWA-2D
WG
Round 1
7/16/2015
7.5
11.9
4.1
182
-
GWA-2D
WG
Round 2
9/30/2015
9.39
12.02
2.7
163
-
GWA-2S
WG
Round 1
7/16/2015
3.7
5.4
-
2.6
GWA-2S
WG
Round 2
9/30/2015
6.01
9.6
-
-
GWA-3D
WG
Round 1
7/19/2015
7.2
11.5
6.2
17.2
GWA-3D
JWG
Round 2
9/30/2015
8.82
-
-
GWA-3S
WG
Round 1
7/19/2015
2.74
5.68
GWA-3S
WG
Round 2
9/30/2015
5.35
GWA-4D
WG
Round 1
7/18/2015
41.63
8.67
GWA-4D
WG
Round 2
10/1/2015
7.98
-
1.3
-
GWA-4S
WG
Round 1
7/18/2015
152.4
6.05
-
6.9
GWA-4S
WG
Round 2
9/30/2015
8.89
5.34
16.8
2
GWA-5D
WG
Round 1
7/19/2015
7.9
6.4
-
-
GWA-5D
WG
Round 2
10/1/2015
4.81
6.42
-
GWA-5S
WG
Round 1
7/20/2015
135.3
6
2.4
GWA-5S
WG
Round 2
10/1/2015
14.5
6.42
-
-
GWA-6D
WG
Round 1
7/17/2015
7.3
11.3
11.4
17.9
GWA-61D
WG
Round 2
9/30/2015
9.3
-
-
GWA-6S
WG
Round 1
7/17/2015
2.4
5.9
GWA-6S
WG
Round 2
9/30/2015
6.68
5.87
6WA-7D
WG
Round 1
7/16/2015
8.6
6.4
GWA-7D
WG
Round 2
10/1/2015
3.67
6.45
-
-
GWA-7S
WG
Round 1
7/16/2015
70.4
22.1
8.4
GWA-7S
WG
Round 2
10/1/2015
5.47
9.27
-
3.2
GWA-8D
WG
Round 1
7/20/2015
10
6.4
-
GWA-8D
WG
Round 2
10/1/2015
9.41
6.2
GWA-8S
WG
Round 1
7/21/2015
9.6
6
GWA-8S
WG
Round 2
10/1/2015
9.12
5.78
GWA-9BR
WG
Round 1
7/21/20 55
7.9
8.6
GWA-9BR
WG
Round 2
9/28/2015
2.49
6.24
MS-10
WG
Round 4
12/21/2015
8.4
4.8
0.62
MW-10D
WG
Round 1
7/14/2015
8
6.4
MW-10S
WG
Round 1
7/14/2015
7.5
5.2
MW-11D
WG
Round 1
7/9/201151
33.6
MW-11S
WG
Round 1
7/9/2015
Page 3 of 8

Table 2-12 Constituents of Interest Evaluation
Corrective Action Plan Part 2
Marshall Steam Stations Ash Basin
Constituent:
Fraction:
Unit:
NC GW Criteria:
Criteria Source:
Turbidity, field
N
NTU
FOR SCREENING
pH
N
SU
8.5
02L
Arsenic
T
ug/I
10
02L
Iron
T
ug/I
300
02L
Manganese
T
ug/1
50
02L
Chromium (VI)
T
ug/I
0.07
DHHS
Antimony
T
ug/I
1
IMAC
Arsenic
T
ug/I
10
02L
Barium
T
ug/I
700
02L
Beryllium
T
ug/I
4
IMAC
Boron
T
ug/I
700
02L
Cadmium
T
ug/I
2
02L
Chromium
T
ug/I
10
02L
Cobalt
T
ug/I
1
[MAC
PPBC (Minimum (for ranges)):
PPBC:
-
10
6.5
8.5
-
5
-
467.1
-
48
-
2.8
-
2.5
-
5
-
157.3
-
1
-
100
No PPBC
-
11.3
-
2.5
Well
Matrix
Event
Date
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Fla
MW-12D
WG
Round 1
7/20/2015
50.08
6.23
484
2.7
MW-12S
WG
Round 1
7/20/2015
7.53
5.56
2
MW-13D
WG
Round 1
7/19/2015
9.5
-
MW-13S
WG
Round 1
7/20/2015
9.1
6.3
MW-14BR
WG
Round 1
7/19/2015
6.9
MW-14BR
WG
Round 2
9/30/2015
9.65
6.24
-
MW-14D
WG
Round 1
7/20/2015
9.06
5.5
2600
2.4
MW-14D
WG
Round 2
9/30/2015
4.58
5.56
2100
1.6
MW-14S
WG
Round 1
7/20/2015
4.5
5.3
57.9
2700
8.2
MW-14S
WG
Round 2
9/30/2015
4.3
5.33
2400
5.4
MW-4
WG
Round 1
7/10/2015
9.9
5.7
-
-
MW-4
WG
Round 2
9/30/2015
29.1
5.47
MW-4
WG
Round 4
12/11/2015
1.37
5.91
2
MW-4D
WG
Round 1
7/10/2015
8.9
6.2
MW-4D
WG
Round 2
9/30/2015
9.61
5.91
11.3
MW-4D
WG
Round 4
12/11/2015
-
-
0.8
-
MW-6D
WG
Round 2
9/30/2015
7.91
5.79
MW-7D
WG
Round 2
9/29/2015
0.78
-
0.24
2
-
MW-7S
WG
Round 1
7/17/2015
3.2
4.3
-
-
10.4
5300
57.6
MW-7S
WG
Round 2
9/29/2015
3.71
4.23
7410
5200
46.8
MW-8D
WG
Round 2
9/29/2015
9.24
6.3
-
-
MW-8S
WG
Round 2
9/29/2015
9.18
6.35
-
MW-9D
WG
lRound 2
9/30/2015
6.6
5.66
1.3
MW-9S
JWG
lRound 2
1 9/29/2015
6.57
-
OB-1
JWG
IRoundl
1 7/21/2015
8.8
5.6
Notes:
1. This table only shows concentrations of constituents that
exceed and regulatory standard or IMAC.
2. If a constituent does not have a regulatory criterion
(aluminum, molybdenum, strontium), it is not shown on this
table.
Orange indicates concentration greater than PPBC
Green indicates concentration less than PPBC
pg/L = micrograms per liter
SU = standard unit
J- = estimated concentration, biased low
J = laboratory estimated concentration
J+ = estimated concentration, biased high
U = results not detected at
02L = North Carolina groundwater standards as
specified in T15A NCAC 02L
IMAC = Interim Maximum Allow Concentration
N = normal
NTU = nephelometric turbidity unit
PPBC = Proposed Provisional Background Concentration
PW = porewater
T = total
WG = groundwater
Page 4 of 8

Table 2-12 Constituents of Interest Evaluation
Corrective Action Plan Part 2
Marshall Steam Stations Ash Basin
Constituent:
Fraction:
Unit:
NC GW Criteria:
Criteria Source:
Iron
T
ug/I
300
02L
Lead
T
ug/I
15
02L
Manganese
T
ug/I
50
02L
Nickel
T
ug/I
100
02L
Selenium
T
ug/I
20
02L
Thallium
T
ug/I
0.2
IMAC
Vanadium
T
ug/I
0.3
IMAC
Zinc
T
ug/I
1000
02L
Total Dissolved
Solids
N
ug/I
500000
02L
Chloride
N
ug/I
250000
02L
Sulfate
N
ug/I
250000
02L
PPBC (Minimum (for ranges)):
PPBC:
-
467.1
-
35.9
-
48
No PPBC
-
10
-
0.5
-
3.9
No PPBC
-
85400
-
3500
-
1460
Well
Matrix
Event
Date
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
AB-10D
WG
Round 1
7/18/2015
4400
2300
9.2
AB-10D
WG
Round 2
9/28/2015
1800
2700
0.41 J
-
-
AB-10S
PW
Round 1
7/16/2015
10200
1400
0.31
19.4
1430000
857000
AB-10S
PW
Round 2
9/28/2015
5100
1800
-
0.78 J
1060000
1190000
AB-10SL
PW
Round 1
7/10/2015
2100
620
0.26
12.7
1220000
670000
AB-10SL
PW
Round 2
9/28/2015
370
620
-
4.1
577000
650000
AB-11 D
WG
Round 1
7/17/2015
540
-
2.3
-
-
AB-11 D
WG
Round 2
9/28/2015
-
-
1
AB-11S
WG
Round 1
7/18/2015
5900
210
20.8
AB-11S
WG
Round 2
9/28/2015
-
110
-
-
AB-12D
WG
Round 1
7/8/2015
130
2.5 J+
1530000
464000
AB-12D
WG
Round 2
9/29/2015
140
1.7
15000000
375000
-
AB-12S
PW
Round 1
7/8/2015
13700
6400
1.1
11600000
3650000
923000
AB-12S
PW
Round 2
9/29/2015
20300
7600
0.44 J
10100000
3340000
1150000
AB-12S
PW
Round 2
10/1/2015
18000
7100
1.1 J+
10500000
3530000
1300000
AB-12SL
PW
Round 1
7/8/2015
11000
950
2.6
AB-12SL
PW
Round 2
9/29/2015
8100
830
0.78 J
AB-13D
WG
Round 1
7/11/2015
570
200
1.1
AB-13D
WG
Round 2
9/28/2015
620
240
-
-
AB-13S
PW
Round 1
7/11/2015
5400
320
1
24.1
AB-13S
PW
Round 2
9/28/2015
5300
380
0.71
6.1
AB-14D
WG
Round 1
7/12/2015
1100
80
-
3.3
AB-14D
WG
Round 2
9/28/2015
-
-
-
1.5
AB-14S
PW
Round 1
7/12/2015
57000
12400
0.24
17.9
1790000
1180000 J+
AB-14S
PW
Round 2
9/28/2015
55400
12800
-
1.2
2220000
1280000
AB-15BR
WG
Round 1
7/13/2015
1300
270
-
-
-
AB-15BR
WG
Round 2
9/29/2015
2100
270
-
AB-15D
WG
Round 1
7/13/2015
2700
200
1.4
AB-15D
WG
Round 2
9/29/2015
2200
230
-
-
AB-15S
PW
Round 1
7/13/2015
18600
2300
1.4
654000
AB-15S
PW
Round 2
9/28/2015
14100
2700
0.62 J
723000
AB-15SL
PW
Round 1
7/13/2015
15400
3100
1.6
AB-15SL
PW
Round 2
9/29/2015
12600
2800
0.58 J
AB-16D
WG
Round 1
7/17/2015
2100
290
0.56 J
AB-16D
WG
Round 2
9/30/2015
2700
280
-
AB-16S
WG
Round 1
7/17/2015
5600
1400
AB-16S
WG
Round 2
9/30/2015
3200
1000
-
AB-17D
WG
Round 1
7/12/2015
640 J-
-
7.1
AB-17D
WG
Round 2
10/1/2015
3.5
AB-17S
PW
Round 1
7/14/2015
72800 J-
17600
2.2
620000
AB-17S
PW
Round 2
9/30/2015
94300
18300
2
727000
275000
AB-18D
WG
Round 1
7/19/2015
430
300
4.2
-
-
AB-18D
WG
Round 2
9/28/2015
460
310
2.9
AB-18S
PW
Round 1
7/14/2015
4900
910
1.1
AB-18S
PW
Round 2
9/28/2015
5200
1100
0.62 J
AB-1 BR
WG
Round 1
7/17/2015
2800
260
0.43 J
AB-1 BR
WG
Round 2
9/28/2015
4900
220
-
AB-1 D
WG
Round 1
7/17/2015
950
180
1.1
541000
AB-1 D
WG
Round 2
9/28/2015
770
150
0.68 J
639000
AB-1S
WG
Round 1
7/17/2015
2200
8000
0.28
-
781000
AB-1S
WG
Round 2
9/28/2015
6100
8900
0.24
796000
AB-20D
WG
Round 1
7/17/2015
-
-
-
1.1
-
AB-20D
WG
Round 2
9/29/2015
-
-
-
1.2
-
AB-20S
IPW
Round 1
7/16/2015
12800
28.7
8400
310
454
14.8
157
5170000
3560000
AB-20S
PW
Round 2
9/29/2015
14000
45.3
8200
624
368
13.5
239
525000
3690000
AB-21 D
WG
Round 1
7/15/2015
1200
-
460
-
-
-
0.74 J
-
-
AB-21 D
WG
Round 2
9/30/2015
2800
300
0.41 J
-
-
AB-21S
PW
Round 1
7/15/2015
233000
3600
-
1090000
353000
AB-21S
PW
Round 2
9/30/20151
335000
4300
-
1130000
491000
AB-2D
WG
Round 1
7/21/20151
1200
440
1.8
-
-
AB-2D
JWG
Round 2
19/29/2015
-
152
1
1
0.87 J
Page 5 of 8

Table 2-12 Constituents of Interest Evaluation
Corrective Action Plan Part 2
Marshall Steam Stations Ash Basin
Constituent:
Fraction:
Unit:
NC CAW Criteria:
Criteria Source:
Iron
T
ug/I
300
02L
Lead
T
ug/I
15
02L
Manganese
T
ug/I
50
02L
Nickel
T
ug/I
100
02L
Selenium
T
ug/I
20
02L
Thallium
T
ug/I
0.2
IMAC
Vanadium
T
ug/I
0.3
IMAC
Zinc
T
ug/I
1000
02L
Total Dissolved
Solids
N
ug/I
500000
02L
Chloride
N
ug/I
250000
02L
Sulfate
N
ug/I
250000
02L
PPBC (Minimum (for ranges)):
PPBC:
-
467.1
-
35.9
-
48
No PPBC
-
10
-
0.5
-
3.9
No PPBC
-
85400
-
3500
-
1460
Well
Matrix
Event
Date
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
AB-2S
WG
Round 1
7/18/2015
470
330
1.8
AB-2S
WG
Round 2
9/29/2015
7500
1700
-
AB-3D
WG
Round 1
7/11/2015
450
260
2.3
AB-3D
WG
Round 2
9/30/2015
-
76
2.2 J+
-
-
AB-3S
PW
Round 1
7/9/2015
32600
580
2
0.84 J
660000
366000
AB-3S
IPW
Round 2
9/29/2015
18400
340
2.2
0.4 J
579000
382000
AB-4D
WG
Round 1
7/14/2015
1900
85
-
0.52 J
-
-
AB-4D
WG
Round 2
10/1/2015
1700
80
-
-
AB-4S
PW
Round 1
7/14/2015
-
-
0.75
1.1
AB-4S
PW
Round 2
9/30/2015
140
0.77
1.4
AB-4SL
PW
Round 1
7/9/2015
-
-
10.9
AB-4SL
PW
Round 1
7/15/2015
-
AB-4SL
PW
Round 2
9/30/2015
-
3.6
AB-5BR
WG
Round 1
7/17/2015
900
650
0.76 J
AB-5BR
WG
Round 2
10/1/2015
650
340
0.31 J
AB-5D
WG
Round 1
7/14/2015
10900
1800
3.4
AB-5D
WG
Round 2
10/1/2015
3400
1300
0.83 J
-
-
AB-5S
PW
Round 1
7/14/2015
2300000
19400
333
0.48 J
83
-
11100000
8850000
AB-5S
PW
Round 2
10/1/2015
2480000
20600
288
1.4
83.9
1200
11300000
7130000
AB-6BR
WG
Round 1
7/15/2015
-
-
-
-
7.4
-
-
-
AB-6BR
WG
Round 2
10/1/2015
-
-
3
AB-6D
WG
Round 1
7/15/2015
5800
550
0.86 J
AB-6D
WG
Round 2
10/1/2015
6000
560
-
AB-6S
PW
Round 1
7/15/2015
2500
1700
1.9
1250000
646000
AB-6S
PW
Round 2
10/1/2015
2400
1700
0.74 J
1210000
635000
AB-7D
WG
Round 1
7/16/2015
2400
-
57.5
AB-7D
WG
Round 2
9/30/2015
570 J+
280
0.68 J
AB-8D
WG
Round 1
7/15/2015
1900
450
5.1
AB-8D
WG
Round 2
9/28/2015
-
570
-
-
AB-8S
PW
Round 1
7/15/2015
47200
2600
0.65
1.5
628000
368000
AB-8S
PW
Round 2
9/28/2015
39200
4600
1.1
0.43 J
832000
486000
AB-9BR
WG
Round 1
7/17/2015
-
-
-
2.4
AB-9BR
WG
Round 2
9/30/2015
-
-
1.4
AB-9D
WG
Round 1
7/16/2015
370
220
2.5
AB-9D
WG
Round 2
9/29/2015
-
110
0.42 J
AB-9S
WG
Round 1
7/16/2015
-
110
1
AB-9S
WG
Round 2
9/29/2015
1200 J+
170
0.47 J
AL-1D
WG
Round 1
7/16/2015
-
-
1.9
744000
AL-1 D
WG
Round 2
9/28/2015
0.82 J
906000
AL-1 D
WG
Round 2
9/29/2015
-
-
AL-1S
WG
Round 1
7/16/2015
1300
3600
0.33
8.5
831000
260000
AL-1S
WG
Round 2
9/28/2015
510
3700
-
1.3
1660000
282000
AL-1S
WG
Round 2
9/29/2015
-
-
-
-
-
AL-2BR
WG
Round 1
7/18/2015
-
24
4.5
AL-2BR
WG
Round 2
10/7/2015
1100
-
6.8
-
AL-2D
WG
Round 1
7/18/2015
3000
8400
0.78 J
761000
386000
AL-2D
WG
Round 2
10/1/2015
-
-
-
-
AL-2D
JWG
Round 2
10/1/2015
750
6100
33.1
0.4 J
841000
472000 J+
AL-2S
WG
Round 1
7/15/2015
54000
1200
108
6.5
1610000
979000
AL-2S
WG
Round 2
10/1/2015
-
-
-
-
-
-
AL-2S
WG
Round 2
10/1/2015
-
52
99.7
1.8
1570000
1050000 J+
AL-3D
WG
Round 1
7/15/2015
1900
590
-
0.65 J
692000
402000
AL-3D
WG
Round 2
9/28/2015
1700
320
-
0.43 J
683000
397000
AL-3S
PW
Round 1
7/16/2015
5600
240
28.5
1.8
163
4810000
3160000
AL-3S
PW
Round 2
9/29/2015
60800
20.7
400
70.6
4.2
3260
3100000
3230000
AL-4D
WG
Round 1
7/20/2015
3100
-
530
-
-
2.4
582000
308000
AL-4D
WG
Round 2
9/28/2015
320
130
1.8
892000
512000
BG-1D
WG
Round 1
7/17/2015
310
54
3.5
-
-
BG-1D
WG
Round 2
9/29/2015
-
-
-
-
-
3.4
BG-1D
WG
Round 3
11/11/2015
350
-
3.1
6G-1D
WG
Round 4
12/11/20151
1000 J
75
1.4
Page 6 of 8

Table 2-12 Constituents of Interest Evaluation
Corrective Action Plan Part 2
Marshall Steam Stations Ash Basin
Constituent:
Fraction:
Unit:
NC GW Criteria:
Criteria Source:
Iron
T
ug/I
300
02L
Lead
T
ug/I
15
02L
Manganese
T
ug/I
50
02L
Nickel
T
ug/I
100
02L
Selenium
T
ug/I
20
02L
Thallium
T
ug/I
0.2
IMAC
Vanadium
T
ug/1
0.3
IMAC
Zinc
T
ug/I
1000
02L
Total Dissolved
Solids
N
ug/I
500000
02L
Chloride
N
ug/I
250000
02L
Sulfate
N
ug/I
250000
02L
PPBC (Minimum (for ranges)):
PPBC:
-
467.1
-
35.9
-
48
No PPBC
-
10
-
0.5
-
3.9
No PPBC
-
85400
-
3500
-
1460
Well
Matrix
Event
Date
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
BG-1S
WG
Round 1
7/17/2015
480
160
3.8
BG-1S
WG
Round 2
9/29/2015
-
130
2.8
BG-1S
WG
Round 3
11/11/2015
690
-
1.6
BG-1S
WG
Round 4
12/11/2015
-
-
0.93 J
BG-2BR
WG
Round 1
7/18/2015
18200
17.5
380
0.23 J
100
BG-2BR
WG
Round 2
9/29/2015
410
-
-
-
13.3
BG-2BR
WG
Round 3
11/11/2015
12.1
BG-2BR
WG
Round 4
12/11/2015
14.1
BG-2S
WG
Round 1
7/19/2015
44
6G-2S
WG
Round 2
9/28/2015
14.5
BG-2S
WG
Round 3
11/13/2015
360
17.8
BG-2S
WG
Round 4
12/11/2015
330
14
BG-3D
WG
Round 1
7/20/2015
21.9
9G-3D
WG
Round 2
9/28/2015
22.1
BG-3D
WG
Round 3
11/11/2015
21.9
9G-3D
WG
Round 4
12/11/2015
23.8
BG-3S
WG
Round 1
7/18/2015
3400
180
14.4
BG-3S
WG
Round 2
9/28/2015
4900
77
12.4
BG-3S
WG
Round 3
11/13/2015
9100
120
116
0.21
30.9
6G-3S
WG
Round 4
12/21/2015
16500
190
221
0.31
58.8
GWA-1BR
WG
Round 1
7/19/2015
780
54
-
-
3.5
5WA-1BR
WG
Round 2
9/29/2015
4300
-
3.6
GWA-1 D
WG
Round 1
7/19/2015
-
-
9.3
GWA-1 D
WG
Round 2
9/29/2015
470
140
2.4
GWA-1S
WG
Round 1
7/21/2015
3900
510
1.7
6WA-1S
WG
Round 2
9/29/2015
1300
470
0.58 J
GWA-2D
WG
Round 1
7/16/2015
-
-
12.2
650000
6WA-2D
WG
Round 2
9/30/2015
-
9.1
-
GWA-2S
WG
Round 1
7/16/2015
92
0.33 J
GWA-2S
WG
Round 2
9/30/2015
-
-
GWA-3D
WG
Round 1
7/19/2015
24.6
6WA-3D
WG
Round 2
9/30/2015
-
4.9
701000
GWA-3S
WG
Round 1
7/19/2015
97
0.56 J
-
GWA-3S
WG
Round 2
9/30/2015
-
0.89 J
GWA-4D
WG
Round 1
7/18/2015
930
69
8.6
GWA-4D
WG
Round 2
10/1/2015
-
-
3.2
GWA-4S
WG
Round 1
7/18/2015
8600
1700
19.5
5WA-4S
WG
Round 2
9/30/2015
480
390
0.82 J
GWA-5D
WG
Round 1
7/19/2015
-
-
1.8
6WA-5D
WG
Round 2
10/1/2015
-
-
1.2
GWA-5S
WG
Round 1
7/20/2015
20500 J+
590
9.2
GWA-5S
WG
Round 2
10/1/2015
1400
130
3.5
GWA-6D
WG
Round 1
7/17/2015
660
-
12.8
GWA-61)
WG
Round 2
9/30/2015
-
-
1.5
GWA-6S
WG
Round 1
7/17/2015
-
82
0.92 J
GWA-6S
WG
Round 2
9/30/2015
780
77
1.2
GWA-7D
WG
Round 1
7/16/2015
2200
76
6.1
GWA-7D
WG
Round 2
10/1/2015
-
-
4.5 J+
GWA-7S
WG
Round 1
7/16/2015
12300
510
23.7
6WA-7S
WG
Round 2
10/1/2015
-
600
1.2 J+
GWA-8D
WG
Round 1
7/20/2015
830
-
4.8
GWA-81)
WG
Round 2
10/1/2015
-
-
3.9
GWA-8S
WG
Round 1
7/21/2015
1500
130
3.5
GWA-8S
WG
Round 2
10/1/2015
830
-
5.5
GWA-9BR
WG
Round 1
7/21/2015
3.9
6WA-9BR
WG
Round 2
9/28/2015
3
MS-10
WG
Round 4
12/21/2015
420
1.5 J+
MW-10D
WG
lRoundl
7/14/2015
3.2
MW-10S
WG
IRoundl
7/14/2015
-
MW-11D
JWG
IRoundl
7/9/2015
1000
23.8
MW-11S
JWG
lRound 1
7/9/2015
2.5
Page 7 of 8

Table 2-12 Constituents of Interest Evaluation
Corrective Action Plan Part 2
Marshall Steam Stations Ash Basin
Constituent:
Fraction:
Unit:
NC GW Criteria:
Criteria Source:
Iron
T
ug/I
300
02L
Lead
T
ug/I
15
02L
Manganese
T
ug/I
50
02L
Nickel
T
ug/I
100
02L
Selenium
T
ug/I
20
02L
Thallium
T
ug/I
0.2
IMAC
Vanadium
T
ug/1
0.3
IMAC
Zinc
T
ug/I
1000
02L
Total Dissolved
Solids
N
ug/I
500000
02L
Chloride
N
ug/I
250000
02L
Sulfate
N
ug/I
250000
02L
PPBC (Minimum (for ranges)):
PPBC:
-
467.1
-
35.9
-
48
No PPBC
-
10
-
0.5
-
3.9
No PPBC
-
85400
-
3500
-
1460
Well
Matrix
Event
Date
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
Result Flag
MW-12D
WG
Round 1
7/20/2015
2900
67
4.6
MW-12S
WG
Round 1
7/20/2015
-
-
0.51 J
MW-13D
WG
Round 1
7/19/2015
5.9
MW-13S
WG
Round 1
7/20/2015
420
4.8
MW-14BR
WG
Round 1
7/19/2015
320
4.3
MW-14BR
WG
Round 2
9/30/2015
4
MW-14D
WG
Round 1
7/20/2015
340
1.3
MW-14D
WG
Round 2
9/30/2015
-
-
-
MW-14S
WG
Round 1
7/20/2015
-
54
0.35 J
552000
MW-14S
WG
Round 2
9/30/2015
420
-
2
522000
MW-4
WG
Round 1
7/10/2015
510
2.2 J
-
MW-4
WG
Round 2
9/30/2015
1400
3.9
MW-4
WG
Round 4
12/11/2015
1.7
MW-4D
WG
Round 1
7/10/2015
2.8
MW-4D
WG
Round 2
9/30/2015
2.5 J+
MW-4D
WG
Round 4
12/11/2015
2.9
MW-6D
WG
Round 2
9/30/2015
0.89 J
MW-7D
WG
Round 2
9/29/2015
-
MW-7S
WG
Round 1
7/17/2015
2200 J+
6000
0.37
4.6
800000
MW-7S
WG
Round 2
9/29/2015
-
5100
0.4 J
-
916000
MW-8D
WG
Round 2
9/29/2015
920
120
-
0.49 J+
-
MW-8S
WG
Round 2
9/29/2015
750
3800
0.98 J+
MW-9D
WG
Round 2
9/30/2015
-
910
0.62 J
MW-9S
JWG
Round 2
9/29/2015
300
1.8
OB-1
JWG
IRoundl
7/21/2015
-
-
Notes:
1. This table only shows concentrations of constituents that
exceed and regulatory standard or IMAC.
2. If a constituent does not have a regulatory criterion
(aluminum, molybdenum, strontium), it is not shown on this
table.
Orange indicates concentration greater than PPBC
Green indicates concentration less than PPBC
pg/L = micrograms per liter
SU = standard unit
J- = estimated concentration, biased low
J = laboratory estimated concentration
J+ = estimated concentration, biased high
U = results not detected at
02L = North Carolina groundwater standards as
specified in T15A NCAC 02L
IMAC = Interim Maximum Allow Concentration
N = normal
NTU = nephelometric turbidity unit
PPBC = Proposed Provisional Background Concentration
PW = porewater
T = total
WG = groundwater
Page 8 of 8

Table 2-13 Surface Water Sampling Analytical Results - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
SW-6
SW-6
SW-7
SW-8
SW-9
SW-10
SW-10
SW-11
MSWW002
MSWW002
Round 1
Round 2
Round 2
Round 2
Round 2
Round 2
Round 2
Round 2
Round 1
Round 2
7/20/2015
10/1/2015
10/1/2015
10/1/2015
10/21/2015
10/21/2015
10/21/2015
10/21/2015
7/21/2015
10/7/2015
N
N
N
N
N
N
FD
N
N
N
SW-6
MA-SW-6-NS-3Q15
MA-SW-7-NS-3Q15
MA-SW-8-NS-3Q15
MA-SW-9-NS-3Q15
MA-SW-10-NS-3Q15
MA-SW-10-FD-3Q15
MA-SW-11-NS-3Q15
MSWW002-S001
MA-MSWW002-S001-NS-3Q15
Constituent
CAS RN
Fractio
n
Criteria
Min (range
only)
02B Class B
Water Supply
Surface
Water Criteria
Unit
Aluminum
7429-90-5
D
/L
100 U
100 U
100 U
100 U
100 U
100 U
100 U
56 J
100 U
Aluminum
7429-90-5
T
87
/L
-
100 U
560
240
77 J
57 J
65 J
100 U
140
520
Antimony
7440-36-0
D
/L
0.5 U
0.5 U
0.5 U
0.5 U
0.25 J
0.4 J
-
0.3 J
0.32 J
0.21 J
Antimony
7440-36-0
T
5.6
/L
0.5 U
0.5 U
0.5 U
0.5 U
0.23 J
0.23 J
0.22 J
0.22 J
0.31 J
0.25 J
Arsenic
7440-38-2
D
150
/L
0.54
0.29 J
0.18 J
0.92
0.4 J
0.56
-
0.42 J
7.3
2
Arsenic
7440-38-2
T
10
/L
0.47 J
0.26 J
0.27 J
1.1
0.44 J
0.49 J
0.44 J
0.42 J
12.1
11.6
Barium
7440-39-3
D
/L
130
120
40
57
13
12
12
13
65
81
Barium
7440-39-3
T
1000
/L
140
110
44
60
14
13
14
14
72
91
Beryllium
7440-41-7
D
6.5
/L
0.2U
0.2U
0.2U
0.2U
0.2U
0.2U
-
0.2U
0.2U
0.2U
Beryllium
7440-41-7
T
/L
0.079J
0.2U
0.2U
0.2U
0.2U
0.2U
0.2U
0.2U
0.2U
0.191
Boron
7440-42-8
D
/L
2000
3900
50 U
530
68
90
86
99
6500
7000
Boron
7440-42-8
T
/L
2200
3500
50 U
520
65
78
83
95
6800
7000
Cadmium
7440-43-9
D
0.15
/L
0.08 U
0.041 J
0.08 U
0.08 U
0.08 U
0.16
-
0.08 U
0.08 U
0.033 J
Cadmium
7440-43-9
T
-
N /L
0.028 J
0.052 J
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.08 U
0.037 J
Calcium
7440-70-2
T
/L
54500
74100
4490
11600
4370
4480
4560
4750
83200
95100
Chromium
7440-47-3
D
11
/L
0.4 J
0.35 J
0.52
0.28 J
0.29 J
0.42 J
-
0.26 J
0.2 J
3
Chromium
7440-47-3
T
/L
0.37 J
0.41 J
0.64
0.8
0.31 J+
1.1 J+
0.27 J+
0.39 J+
0.26 J
0.47 J
Cobalt
7440-48-4
D
/L
4.7
24.9
0.28 J
3.2
0.5 U
0.21 J
-
0.5 U
0.49 J
1.6
Cobalt
7440-48-4
T
3
/L
4.5
24.6
0.35 J
3.5
0.5 U
0.5 U
0.5 U
0.5 U
0.71
2.4
Copper
7440-50-8
D
2.7
/L
1 UJ
0.38 J
0.33 J
0.41 J
1.6 J+
9.2
-
2.9 J+
0.8 J
6.3
Copper
7440-50-8
T
/L
1 U
1 U
0.8 J+
0.94 J+
0.98 J
1.4
0.86 J
1
0.89 J
1.2
Iron
7439-89-6
D
/L
2000
270
2100
30 J
50 U
50 U
26 J
50 U
50 U
Iron
7439-89-6
T
/L
-
2300
1100
4100
180
180
170
150
290
1100
Lead
7439-92-1
D
0.54
/L
0,047 J
0.1 U
0.1 U
0.054 J
0.25
0.8
-
0.23
0.1 U
0.88
Lead
7439-92-1
T
/L
0.053 J+
0.1 U
0.58
0.36
0.055 J
0.055 J
0.1 U
0.1 U
0.18
0.28
Magnesium
7439-95-4
T
/L
23800
43400
1260
4890
2190
2310
2360
2500
59900
65200
Manganese
7439-96-5
D
/L
630
1700
52
260
34
47
47
48
670
1400
Manganese
7439-96-5
T
/L
680
1600
57
270
100
97
100
93
760
1700
Mercury
7439-97-6
D
/L
-
0.2 U
0.2 U
0.2 U
-
-
-
-
-
-
Mercu
7439-97-6
T
0.012
/L
0.000439 J
0.2 U
0.2 U
0.2 U
0.000665 J+
0.000668 J+
0.00102 J+
0.000862 J+
0.0014
0.00647
Methane
74-82-8
N
/L
126
52
24.2
159
2 J+
2.6 J+
2.1 J+
3.1 J+
5 J
2 J+
Molybdenum
7439-98-7
D
/L
0.1 J
0.5 U
0.5 U
0.15 J
0.32 J
0.5
0.36 J
7.1
6.4
Molybdenum
7439-98-7
T
160
/L
0.14 J
0.5 U
0.5 U
0.26 J
0.28 J
0.34 J
0.29 J
0.35 J
7
7.2
Nickel
7440-02-0
D
16
/L
3
12.8
0.21 J
4.6
0.28 J
1
-
0.26 J
2.3
6.2
Nickel
7440-02-0
T
25
/L
2.9
12.7
0.22 J
5
0.24 J
0.57
0.23 J
0.32 J
2.6
5.4
Potassium
7440-09-7
T
/L
3540 J
5200
5000 U
4170 J
5000 U
5000 U
5000 U
5000 U
3490 J
4890 J
Selenium
7782-49-2
D
/L
0.27 J
1.6
0.5 U
0.43 J
0.5 U
0.5 U
-
0.5 U
1.9
1.1
Selenium
7782-49-2
T
5
/L
0.38 J
1.8
0.5 U
0.46 J
0.5 U
0.5 U
0.5 U
0.5 U
1.8
1.5
Sodium
7440-23-5
T
/L
27100
38300
7040
8690
4930 J
5020
4910 J
4990 J
8020
9210
Strontium
7440-24-6
D
/L
1700
1600
55
120
30
31
32
32
510
620
Strontium
7440-24-6
T
14000
/L
1800
1500
58
130
28
29
29
30
540
650
Thallium
7440-28-0
D
/L
0.024 J
0.04 J
0.1 U
0.12
0.1 U
0.19
-
0.026 J
0.14
0.078 J
Thallium
7440-28-0
T
0.24
/L
0.037 J
0.042 J
0.023 J
0.12
0.018 J+
0.027 J+
0.1 UJ
0.1 UJ
0.14
0.075 J
Vanadium
7440-62-2
D
/L
1 U
1 U
1.2
0.66 J
0.52 J
0.55 J
-
0.46 J
0.93 J
0.3 J
Vanadium
7440-62-2
T
/L
0.46 J
1 U
2.2
1.9
0.62 J
0.72 J
0.57 J
0.53 J
1.9
1.8
Zinc
7440-66-6
D
36
/L
10 U
8.5 J
10 U
7.3 J
10 U
6.7 J
7 J
11
10 U
8 J
Zinc
7440-66-6
T
/L
3.4 J
6.5 J
10 U
5.5 J
3.2 J
10 U
10 U
10 U
10 U
11
Total Dissolved Solids
TDS
N
500000
/L
466000
674000
84000
119000
59000
61000
60000
56000 J
860000
757000
Total Organic Carbon
TOC
N
/L
1500
13000
2600
5200
1900
4200
1900
2000
2300
1800
Total Suspended Solids
TSS
N
/L
12300
7800
12900
13000
2500 U
2500 U
5000 U
2500 U
5600
18100
Alkalinity, CO3
ALK-CO3
N
/L
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
/L
38400
37400
19400
29800
15700
15000
15100
15100
19000
18800
Alkalinity, lab
ALK-LAB
N
/L
38400
37400
19400 J-
29800 J-
15700 J+
15000 J+
15100 J+
15100 J+
19000
18800
Chloride
16887-00-6
N
230000
/L
81600
7900
3000
4000
6900
7800
7700
8100
214000
220000
Nitrogen, NO2 plus NO3
NO2-NO3
N
/L
20 U
25
98 J-
340 J-
180
180
180
180
190
180
Sulfate
14808-79-8
N
250000
/L
129000
376000 J+
7500
31700
4000
4400
4400
4600
123000
129000
Sulfide
18496-25-8
N
/L
100 U
100 UJ
100 U
100 U
100 U
100 U
100 U
100 U
100 U
100 U
Arsenic
7440-38-2
T
10
/L
1.12 J+
-
-
-
-
-
-
-
5.64 J+
-
Chromium
7440-47-3
T
/L
0.848 J+
0.54 J+
Iron
7439-89-6
T
/L
6420
242
Manganese
7439-96-5
D
/L
704
680
Manganese
7439-96-5
T
/L
709
737
As III
7784-46-5
T
/L
0.155 J+
0.833 J+
As V
10103-60-3
T
pgIL
0.961 J+
4.81 J+
Chromium VI
18540-29-9
D
/L
0.02 U
0.009 J
Fe II
1345-25-1
T
/L
490 J+
30 U
Se IV
10102-18-8
T
/L
2 U
1.7 J
Se VI
13410-01-0
T
/L
2 U
0.283 J
Page 1 of 2

Table 2-13 Surface Water Sampling Analytical Results - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
SW-6
SW-6
SW-7
SW-8
SW-9
SW-10
SW-10
SW-11
MSWW002
MSWW002
Round 1
Round 2
Round 2
Round 2
Round 2
Round 2
Round 2
Round 2
Round 1
Round 2
7/20/2015
10/1/2015
10/1/2015
10/1/2015
10/21/2015
10/21/2015
10/21/2015
10/21/2015
7/21/2015
10/7/2015
N
N
N
N
N
N
FD
N
N
N
SW-6
MA-SW-6-NS-3Q15
MA-SW-7-NS-3Q15
MA-SW-8-NS-3Q15
MA-SW-9-NS-3Q15
MA-SW-10-NS-3Q15
MA-SW-10-FD-3Q15
MA-SW-11-NS-3Q15
MSWW002-S001
MA-MSWW002-S001-NS-3Q15
Constituent
CAS RN
Fractio
n
Criteria
Min (range
only)
02B Class B
Water Supply
Surface
Water Criteria
Unit
Dissolved Oxygen
DO
N
m /L
1.4
1.5
5.67
1.17
6.08
7
Temperature
TEMP
N
-
-
Deg C
21.2
18.9
17.7
18A
28.5
17.7
H
PH
N
6
9
SU
6.18
6.44
6.59
6.81
6.65
6.4
Turbidity, field
TURB
N
-
-
NTU
7.84
6.02
26.4
19.3
4.08
51.9
Specific Conductivity field
Sc
NPS/cm
680
827
69.8
331.3
1060
1055
Oxidation Reduction Potential
ORP
N
my
-2.7
-36.5
21.6
-96.2
228
222.2
Notes:
pm = micron
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
mg/L = milligrams per liter
my = millivolts
NTU - nephelometric turbidity units
pCi/L = picocuries per liter
SU = standard unit
J = laboratory estimated concentration
J- = estimated concentration, biased low
J+ = estimated concentration, biased high
U = results not detected at concentrations which equal the laboratory's method reporting limit
02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216
(amended effective January 2015)
02L = North Carolina groundwater standards as specified in T15A NCAC 02L
D = dissolved
Deg C = degree Celsius
DHHS = North Carolina Department of Health and Human Services
DO = dissolved oxygen
GW = groundwater
GWQS = groundwater quality standard
IMAC = Interim Maximum Allow Concentration
N = normal
NS = no standard
T = total
TDS = total dissolved solids
TOC = total organic carbon
Page 2 of 2

Table 2-14 Areas of Wetness Sampling Analytical Results - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
MSSW001
MSSW001
S-2
S-2
Round 1
Round 2
Round 1
Round 2
7/21/2015
10/1/2015
7/18/2015
10/1/2015
N
N
N
N
MSSW001 S001
SSW001S001-NS
S-2
MA-S-2-NS-3015
Constituent
CAS RN
Fractio
n
Criteria
Min (range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Aluminum
7429-90-5
D
u /L
1 130
160
210
Aluminum
7429-90-5
T
/L
140
850
-
190
Antimony
7440-36-0
D
-
/L
0.5 U
0.24 J
0.5 U
0.5 U
Antimony
7440-36-0
T
1
IMAC
/L
0.5 U
0.22 J
0.86 J
0.5 U
Arsenic
7440-38-2
D
/L
2.7
0.89
1.3
1.3
Arsenic
7440-38-2
T
10
02L
/L
2.3
1.1
87.1
1.1
Barium
7440-39-3
D
/L
87
53
130
120
Barium
7440-39-3
T
700
02L
/L
95
58
990
120
Beryllium
7440-41-7
D
/L
0.13 J
0.2 U
0.074 J
0.3
Beryllium
7440-41-7
T
4
IMAC
/L
0.17 J
0.2 U
15.2
0.26
Boron
7440-42-8
D
-
/L
5600
41 J
5300
6900
Boron
7440-42-8
T
700
02L
/L
6000
43 J
4000
6100
Cadmium
7440-43-9
D
/L
0.2
0.038 J
0.08 U
0.4
Cadmium
7440-43-9
T
2
02L
/L
0.23
0.04 J
1.3
0.38
Calcium
7440-70-2
T
-
N /L
98400
29300
107000
153000
Chromium
7440-47-3
D
/L
0.3 J
0.47 J
0.2 J
0.32 J
Chromium
7440-47-3
T
10
02L
/L
0.34 J
1.3
85.7
0.5 U
Cobalt
7440-48-4
D
/L
81.9
0.14 J
25.6
54.7
Cobalt
7440-48-4
T
1
IMAC
/L
92
0.44 J
333
47.8
Copper
7440-50-8
D
-
/L
1.2
2.4
2.4 J+
2.8
Copper
7440-50-8
T
1000
02L
/L
0.75 J
3.8
112
0.6 J+
Iron
7439-89-6
D
/L
50 U
98
-
2100
Iron
7439-89-6
T
300
02L
/L
50 U
830
-
1800
Lead
7439-92-1
D
-
/L
0.41
0.81
0.53
0.4
Lead
7439-92-1
T
15
02L
/L
0.55
3
227
0.57
Magnesium
7439-95-4
T
/L
42600
3570
40900
66900
Manganese
7439-96-5
D
/L
7800
10
8700 J-
8500
Manganese
7439-96-5
T
50
02L
/L
8500
23
11600
7900
Mercury
7439-97-6
D
/L
-
0.2 U
-
0.2 U
Mercury
7439-97-6
T
1
02L
/L
0.0253
0.2 U
0.074
0.2 U
Methane
74-82-8
N
/L
1.2 J
1.5 J+
60.2
1.6 J+
Molybdenum
7439-98-7
D
/L
0.5 U
7.7
0.36 J
0.5 U
Molybdenum
7439-98-7
T
/L
0.11 J
7.1
4.2
0.5 U
Nickel
7440-02-0
D
/L
1.5
0.39 J
0.69
3.4
Nickel
7440-02-0
T
100
02L
/L
1.7
1
51
2.9
Potassium
7440-09-7
T
/L
5890
5330
25000 U
9880
Selenium
7782-49-2
D
-
/L
1.2
0.84
0.27 J
0.47 J
Selenium
7782-49-2
T
20
02L
/L
1.1
0.82
25.1
0.44 J
Sodium
7440-23-5
T
/L
7610
3860 J
25000 U
13500
Strontium
7440-24-6
D
/L
750
340
910
1400
Strontium
7440-24-6
T
/L
820
350
1100
1400
Thallium
7440-28-0
D
/L
0.59
0.065 J
0.024 J
1.1
Thallium
7440-28-0
T
0.2
IMAC
/L
0.6
0.073 J
8.6
1
Vanadium
7440-62-2
D
/L
1 U
1.6
1 U
1 U
Vanadium
7440-62-2
T
0.3
IMAC
/L
1 U
3.2
566
1 U
Zinc
7440-66-6
D
/L
16
10 U
14
14
Zinc
7440-66-6
T
1000
02L
/L
15
6.9 J
240
9.2 J
Total Dissolved Solids
TDS
N
500000
02L
/L
989000
154000
892000
1340000
Total Organic Carbon
TOC
N
/L
1000 U
2300
19900
2700
Total Suspended Solids
TSS
N
/L
2500 U
4500
20500000
7800 J
Alkalinity, CO3
ALK-CO3
N
/L
5000 U
5000 U
5000 U
5000 U
Alkalinity, HCO3
ALK-HCO3
N
/L
8800
26800
24600
3600 J
Alkalinity, lab
ALK-LAB
N
/L
8800
26800
24600
3600 J
Chloride
16887-00-6
N
250000
02L
/L
218000
3400
207000
370000
Nitrogen, NO2 plus NO3
NO2-NO3
N
/L
100
3700
20 U
78
Sulfate
14808-79-8
N
250000
02L
/L
140000
51400
130000
164000
Sulfide
18496-25-8
N
/L
100 U
100 U
100 U
100 U
As III
7784-46-5
T
/L
0.5 UJ
-
-
-
As V
10103-60-3
T
/L
0.5 UJ
Chromium VI
18540-29-9
D
0.07
DHHS
/L
0.12
Fe II
1345-25-1
T
/L
30 U
Se IV
10102-18-8
T
/L
2 U
Se VI
13410-01-01
T
I
I
I
pg/L
1 2 U
Page 1 of 2

Table 2-14 Areas of Wetness Sampling Analytical Results - Round 1 and Round 2
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Location:
Event:
Sample Date:
Sample Type Code:
Sample Name/ID:
MSSW001
MSSW001
S-2
S-2
Round 1
Round 2
Round 1
Round 2
7/21/2015
10/1/2015
7/18/2015
10/1/2015
N
N
N
N
MSSW001 S001
SSW001S001-NS
S-2
MA-S-2-NS-3015
Constituent
CAS RN
Fractio
n
Criteria
Min (range
only)
NCDEQ 02L
GWQS,
IMACs, DHHS
Criteria
Source
Unit
Dissolved Oxygen
DO
N
m /L
4.32
8.17
0.07
7.47
Temperature
TEMP
N
-
-
Deg C
20.9
20.07
25.7
19.85
H
PH
N
6.5
8.5
02L
SU
5.61
6.68
6.3
5.13
Turbidity, field
TURB
N
-
-
NTU
1.29
38.5
986
9.02
Specific Conductivity field
SC
N
J S/cm
1090
160
900
1500
Oxidation Reduction Potential
ORP
N
my
282
-90.1
-65
-70.8
Notes:
pm = micron
pg/L = micrograms per liter
pS/cm = microsiemens per centimeter
ft = feet
mg/L = milligrams per liter
my = millivolts
NTU - nephelometric turbidity units
pCi/L = picocuries per liter
SU = standard unit
J = laboratory estimated concentration
J- = estimated concentration, biased low
J+ = estimated concentration, biased high
U = results not detected at concentrations which equal the laboratory's method reporting limit
02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216
(amended effective January 2015)
02L = North Carolina groundwater standards as specified in T15A NCAC 02L
D = dissolved
Deg C = degree Celsius
DHHS = North Carolina Department of Health and Human Services
DO = dissolved oxygen
GW = groundwater
GWQS = groundwater quality standard
IMAC = Interim Maximum Allow Concentration
N = normal
NS = no standard
T = total
TDS = total dissolved solids
TOC = total organic carbon
Page 2 of 2

Table 9-1 Interim Monitoring Plan Sample Locations
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Well ID / Approximate Well Well Screen Length Top of screen Bottom of screen
Sampling Description Total Depth (ft) (ft. bgs) (ft. bgs) Sample Frequency
Location (ft. bgs)
GROUNDWATER WELLS
AB-1 BR
CSA Well
126.05
5
121.05
126.05
Quarterly
A13-1 D
CSA Well
97.86
5
92.86
97.86
Quarterly
AB-1S
CSA Well
23.65
15
8.65
23.65
Quarterly
AB-21D
CSA Well
99.4
5
94.4
99.4
Quarterly
AB-2S
CSA Well
34.7
15
19.7
34.7
Quarterly
AB-31D
CSA Well
137.89
5
132.89
137.89
Quarterly
AB-3S
CSA Well
23.5
15
8.5
23.5
Quarterly
AB-41D
CSA Well
79.81
5
74.81
79.81
Quarterly
AB-4S
CSA Well
23.58
15
8.58
23.58
Quarterly
AB-4SL
CSA Well
51.27
10
41.27
51.27
Quarterly
AB-5BR
CSA Well
112.78
5
107.78
112.78
Quarterly
AB-51D
CSA Well
86
5
81
86
Quarterly
AB-5S
CSA Well
21.4
15
6.4
21.4
Quarterly
AB-6BR
CSA Well
113.2
5
108.2
113.2
Quarterly
AB-61D
CSA Well
70
5
65
70
Quarterly
AB-6S
CSA Well
25.2
15
10.2
25.2
Quarterly
A13-71D
CSA Well
86.89
5
81.89
86.89
Quarterly
AB-7S
CSA Well
23.95
15
8.95
23.95
Quarterly
AB-81D
CSA Well
102.33
5
97.33
102.33
Quarterly
AB-8S
CSA Well
16.15
10
6.15
16.15
Quarterly
AB-91BR
CSA Well
86.6
5
81.6
86.6
Quarterly
AB-91D
CSA Well
56.05
5
51.05
56.05
Quarterly
AB-9S
CSA Well
16.2
10
6.2
16.2
Quarterly
AB-10D
CSA Well
79.42
5
74.42
79.42
Quarterly
AB-10S
CSA Well
27.13
15
12.13
27.13
Quarterly
AB-10SL
CSA Well
52.6
10
42.6
52.6
Quarterly
AB-11 D
CSA Well
85
5
80
85
Quarterly
AB-11S
CSA Well
18.9
10
8.9
18.9
Quarterly
AB-12D
CSA Well
69.95
5
64.95
69.95
Quarterly
AB-12S
CSA Well
16.55
10
6.55
16.55
Quarterly
AB-12SL
CSA Well
53
10
43
53
Quarterly
AB-13D
CSA Well
89.42
5
84.42
89.42
Quarterly
AB-13S
CSA Well
33
15
18
33
Quarterly
AB-14D
CSA Well
88
5
83
88
Quarterly
AB-14S
CSA Well
23.2
15
8.2
23.2
Quarterly
AB-15BR
CSA Well
114.89
5
109.89
114.89
Quarterly
AB-15D
CSA Well
72
5
67
72
Quarterly
AB-15S
CSA Well
23.69
15
8.69
23.69
Quarterly
AB-15SL
CSA Well
52.27
10
42.27
52.27
Quarterly
AB-16D
CSA Well
49.39
5
44.39
49.39
Quarterly
AB-16S
CSA Well
16.55
10
6.55
16.55
Quarterly
AB-17D
CSA Well
114.1
5
109.1
114.1
Quarterly
AB-17S
CSA Well
24.65
10
14.65
24.65
Quarterly
AB-18D
CSA Well
79.88
5
74.88
79.88
Quarterly
AB-18S
CSA Well
16.22
10
6.22
16.22
Quarterly
AB-20D
CSA Well
147.2
5
142.2
147.2
Quarterly
AB-20S
CSA Well
71.57
15
56.57
71.57
Quarterly
AB-21 D
CSA Well
67.52
5
62.52
67.52
Quarterly
AB-21S
CSA Well
31.33
15
16.33
31.33
Quarterly
AL-1 D
CSA Well
88.05
5
83.05
88.05
Quarterly
AL-1 S
CSA Well
50.3
15
35.3
50.3
Quarterly
AL-2BR
CSA Well
213.8
5
208.8
213.8
Quarterly
AL-21D
CSA Well
159.5
5
154.5
159.5
Quarterly
AL-2S
CSA Well
131.92
15
116.92
131.92
Quarterly
AL-31D
CSA Well
187.35
5
182.35
187.35
Quarterly
AL-3S
CSA Well
121.04
15
106.04
121.04
Quarterly
AL-41D
CSA Well
155.75
5
150.75
155.75
Quarterly
BG-1 D
Background/CSA Well
43.75
5
38.75
43.75
Quarterly
BG-IS
Background/CSA Well
18.45
10
8.45
18.45
Quarterly
BG-2BR
Background/CSA Well
58.3
5
53.3
58.3
Quarterly
BG-2S
Background/CSA Well
18.56
5
13.56
18.56
Quarterly
BG-3D
Background/CSA Well
67.53
10
57.53
67.53
Quarterly
BG-3S
Background/CSA Well
35.3
5
30.3
35.3
Quarterly
GWA-1BR
CSA Well
162
5
157
162
Quarterly
GWA-1 D
CSA Well
127
15
112
127
Quarterl
Page 1 of 2

Table 9-1 Interim Monitoring Plan Sample Locations
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
Well ID / Approximate Well
Sampling Description Total Depth
Location (ft. bgs)
Well Screen Length I Top of screen
(ft)
(ft. bgs)
Bottom of screen
(ft. bgs) Sample Frequency
GWA-IS
CSA Well
57.81
5
52.81
57.81
Quarterly
GWA-21D
CSA Well
85.98
15
70.98
85.98
Quarterly
GWA-2S
CSA Well
32.15
5
27.15
32.15
Quarterly
GWA-31D
CSA Well
44.55
10
34.55
44.55
Quarterly
GWA-3S
CSA Well
16.25
5
11.25
16.25
Quarterly
GWA-41D
CSA Well
88.6
15
73.6
88.6
Quarterly
GWA-4S
CSA Well
67.93
5
62.93
67.93
Quarterly
GWA-51D
CSA Well
51.35
10
41.35
51.35
Quarterl
GWA-5S
CSA Well
37.38
5
32.38
37.38
Quarterly
GWA-61D
CSA Well
109.91
10
99.91
109.91
Quarterly
GWA-6S
CSA Well
50.78
5
45.78
50.78
Quarterly
GWA-71D
CSA Well
33.08
10
23.08
33.08
Quarterly
GWA-7S
CSA Well
22.11
5
17.11
22.11
Quarterly
GWA-81D
CSA Well
64.15
15
49.15
64.15
Quarterly
GWA-8S
CSA Well
39.97
5
34.97
39.97
Quarterl
GWA-9BR
CSA Well
91.66
5
86.66
91.66
Quarterly
MS-10
Background/FGD
Residue Landfill Well
26.34
10
16.34
26.34
Quarterly
MW-4
Background/Compliance
Well
51.6
10
41.6
51.6
Quarterly
MW-41D
Background/Compliance
Well
64.12
5
59.12
64.12
Quarterly
MW-6S
Voluntary Well
24.88
10
14.88
24.88
Quarterly
MW-61D
Voluntary Well
87.34
5
82.34
87.34
Quarterly
MW-7S
Voluntary Well
20.53
5
15.53
20.53
Quarterly
MW-71D
Voluntary Well
66.48
5
61.48
66.48
Quarterly
MW-81D
Voluntary Well
97.43
10
87.43
97.43
Quarterly
MW-8S
Voluntary Well
27.14
5
22.14
27.14
Quarterly
MW-91D
Voluntary Well
94.95
10
84.95
94.95
Quarterly
MW-9S
Voluntary Well
30.8
5
25.8
30.8
Quarterly
MW-11 D
Compliance Well
93.32
5
88.32
93.32
Quarterly
MW-11S
Compliance Well
54.38
15
39.38
54.38
Quarterly
MW-12D
Compliance Well
98.59
5
93.59
98.59
Quarterly
MW-12S
Compliance Well
25.32
15
10.32
25.32
Quarterly
MW-13D
Compliance Well
48.61
5
43.61
48.61
Quarterly
MW-13S
Compliance Well
21.12
15
6.12
21.12
Quarterly
MW-14BR
CSA Well
110.84
5
105.84
110.84
Quarterly
MW-14D
Compliance Well
62.85
15
47.85
62.85
Quarterly
MW-14S
Compliance Well
47.13
10
37.13
47.13
Quarterly
ASH BASIN WATER
SW-1
Ash Basin Water
NA
NA
NA
NA
Quarterly
SW-2
Ash Basin Water
NA
NA
NA
NA
Quarterly
SW-3
Ash Basin Water
NA
NA
NA
NA
Quarterly
SW-4
Ash Basin Water
NA
NA
NA
NA
Quarterly
SW-5
Ash Basin Water
NA
NA
NA
NA
Quarterly
SURFACE WATER
SW-6
SW
NA
NA
NA
NA
Quarterly
SW-7
SW
NA
NA
NA
NA
Quarterly
SW-8
SW
NA
NA
NA
NA
Quarterly
SW-9
SW
NA
NA
NA
NA
Quarterly
SW-10
SW
NA
NA
NA
NA
Quarterly
SW-11
SW
NA
NA
NA
NA
Quarterly
NCDEQ WATER SAMPLING LOCATION
MSSW001 S001 SIP NA I NA I NA NA Quarterly
Page 2 of 2

Table 9-2 Sampling Parameters and Analytical Methods
Corrective Action Plan Part 2
Marshall Steam Station Ash Basin
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
Page 1 of 1

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